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 | ||
252b5132 RH |
544 | /* The size in bytes of an entry in the procedure linkage table. */ |
545 | ||
546 | #define PLT_ENTRY_SIZE 16 | |
547 | ||
548 | /* The first entry in an absolute procedure linkage table looks like | |
eac338cf PB |
549 | this. See the SVR4 ABI i386 supplement to see how this works. |
550 | Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */ | |
252b5132 | 551 | |
eac338cf | 552 | static const bfd_byte elf_i386_plt0_entry[12] = |
252b5132 RH |
553 | { |
554 | 0xff, 0x35, /* pushl contents of address */ | |
555 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
556 | 0xff, 0x25, /* jmp indirect */ | |
eac338cf | 557 | 0, 0, 0, 0 /* replaced with address of .got + 8. */ |
252b5132 RH |
558 | }; |
559 | ||
560 | /* Subsequent entries in an absolute procedure linkage table look like | |
561 | this. */ | |
562 | ||
563 | static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] = | |
564 | { | |
565 | 0xff, 0x25, /* jmp indirect */ | |
566 | 0, 0, 0, 0, /* replaced with address of this symbol in .got. */ | |
567 | 0x68, /* pushl immediate */ | |
568 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
569 | 0xe9, /* jmp relative */ | |
570 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
571 | }; | |
572 | ||
eac338cf PB |
573 | /* The first entry in a PIC procedure linkage table look like this. |
574 | Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */ | |
252b5132 | 575 | |
eac338cf | 576 | static const bfd_byte elf_i386_pic_plt0_entry[12] = |
252b5132 RH |
577 | { |
578 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
eac338cf | 579 | 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */ |
252b5132 RH |
580 | }; |
581 | ||
582 | /* Subsequent entries in a PIC procedure linkage table look like this. */ | |
583 | ||
584 | static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] = | |
585 | { | |
586 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
587 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
588 | 0x68, /* pushl immediate */ | |
589 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
590 | 0xe9, /* jmp relative */ | |
591 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
592 | }; | |
593 | ||
dd7e64d4 L |
594 | /* Entries in the GOT procedure linkage table look like this. */ |
595 | ||
596 | static const bfd_byte elf_i386_got_plt_entry[8] = | |
597 | { | |
598 | 0xff, 0x25, /* jmp indirect */ | |
599 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
600 | 0x66, 0x90 /* xchg %ax,%ax */ | |
601 | }; | |
602 | ||
603 | /* Entries in the PIC GOT procedure linkage table look like this. */ | |
604 | ||
605 | static const bfd_byte elf_i386_pic_got_plt_entry[8] = | |
606 | { | |
607 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
608 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
609 | 0x66, 0x90 /* xchg %ax,%ax */ | |
610 | }; | |
611 | ||
e41b3a13 JJ |
612 | /* .eh_frame covering the .plt section. */ |
613 | ||
614 | static const bfd_byte elf_i386_eh_frame_plt[] = | |
615 | { | |
616 | #define PLT_CIE_LENGTH 20 | |
617 | #define PLT_FDE_LENGTH 36 | |
618 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
619 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
620 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
621 | 0, 0, 0, 0, /* CIE ID */ | |
622 | 1, /* CIE version */ | |
623 | 'z', 'R', 0, /* Augmentation string */ | |
624 | 1, /* Code alignment factor */ | |
625 | 0x7c, /* Data alignment factor */ | |
626 | 8, /* Return address column */ | |
627 | 1, /* Augmentation size */ | |
628 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
629 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
630 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
631 | DW_CFA_nop, DW_CFA_nop, | |
632 | ||
633 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
634 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
635 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
636 | 0, 0, 0, 0, /* .plt size goes here */ | |
637 | 0, /* Augmentation size */ | |
638 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
639 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
640 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
641 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
642 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
643 | 11, /* Block length */ | |
644 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
645 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
646 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
28ede8be | 647 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, |
e41b3a13 JJ |
648 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop |
649 | }; | |
650 | ||
fff53dae L |
651 | /* .eh_frame covering the .plt.got section. */ |
652 | ||
653 | static const bfd_byte elf_i386_eh_frame_plt_got[] = | |
654 | { | |
655 | #define PLT_GOT_FDE_LENGTH 16 | |
656 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
657 | 0, 0, 0, 0, /* CIE ID */ | |
658 | 1, /* CIE version */ | |
659 | 'z', 'R', 0, /* Augmentation string */ | |
660 | 1, /* Code alignment factor */ | |
661 | 0x7c, /* Data alignment factor */ | |
662 | 8, /* Return address column */ | |
663 | 1, /* Augmentation size */ | |
664 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
665 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
666 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
667 | DW_CFA_nop, DW_CFA_nop, | |
668 | ||
669 | PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
670 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
671 | 0, 0, 0, 0, /* the start of .plt.got goes here */ | |
672 | 0, 0, 0, 0, /* .plt.got size goes here */ | |
673 | 0, /* Augmentation size */ | |
674 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
675 | }; | |
676 | ||
25e762b9 RM |
677 | struct elf_i386_plt_layout |
678 | { | |
679 | /* The first entry in an absolute procedure linkage table looks like this. */ | |
680 | const bfd_byte *plt0_entry; | |
681 | unsigned int plt0_entry_size; | |
682 | ||
683 | /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */ | |
684 | unsigned int plt0_got1_offset; | |
685 | unsigned int plt0_got2_offset; | |
686 | ||
687 | /* Later entries in an absolute procedure linkage table look like this. */ | |
688 | const bfd_byte *plt_entry; | |
689 | unsigned int plt_entry_size; | |
690 | ||
691 | /* Offsets into plt_entry that are to be replaced with... */ | |
692 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
693 | unsigned int plt_reloc_offset; /* ... offset into relocation table. */ | |
694 | unsigned int plt_plt_offset; /* ... offset to start of .plt. */ | |
695 | ||
696 | /* Offset into plt_entry where the initial value of the GOT entry points. */ | |
697 | unsigned int plt_lazy_offset; | |
698 | ||
699 | /* The first entry in a PIC procedure linkage table looks like this. */ | |
700 | const bfd_byte *pic_plt0_entry; | |
701 | ||
702 | /* Subsequent entries in a PIC procedure linkage table look like this. */ | |
703 | const bfd_byte *pic_plt_entry; | |
704 | ||
705 | /* .eh_frame covering the .plt section. */ | |
706 | const bfd_byte *eh_frame_plt; | |
707 | unsigned int eh_frame_plt_size; | |
fff53dae L |
708 | |
709 | /* .eh_frame covering the .plt.got section. */ | |
710 | const bfd_byte *eh_frame_plt_got; | |
711 | unsigned int eh_frame_plt_got_size; | |
25e762b9 RM |
712 | }; |
713 | ||
714 | #define GET_PLT_ENTRY_SIZE(abfd) \ | |
715 | get_elf_i386_backend_data (abfd)->plt->plt_entry_size | |
716 | ||
717 | /* These are the standard parameters. */ | |
718 | static const struct elf_i386_plt_layout elf_i386_plt = | |
719 | { | |
720 | elf_i386_plt0_entry, /* plt0_entry */ | |
721 | sizeof (elf_i386_plt0_entry), /* plt0_entry_size */ | |
722 | 2, /* plt0_got1_offset */ | |
723 | 8, /* plt0_got2_offset */ | |
724 | elf_i386_plt_entry, /* plt_entry */ | |
725 | PLT_ENTRY_SIZE, /* plt_entry_size */ | |
726 | 2, /* plt_got_offset */ | |
727 | 7, /* plt_reloc_offset */ | |
728 | 12, /* plt_plt_offset */ | |
729 | 6, /* plt_lazy_offset */ | |
730 | elf_i386_pic_plt0_entry, /* pic_plt0_entry */ | |
731 | elf_i386_pic_plt_entry, /* pic_plt_entry */ | |
732 | elf_i386_eh_frame_plt, /* eh_frame_plt */ | |
733 | sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */ | |
fff53dae L |
734 | elf_i386_eh_frame_plt_got, /* eh_frame_plt_got */ |
735 | sizeof (elf_i386_eh_frame_plt_got), /* eh_frame_plt_got_size */ | |
25e762b9 RM |
736 | }; |
737 | \f | |
738 | ||
eac338cf PB |
739 | /* On VxWorks, the .rel.plt.unloaded section has absolute relocations |
740 | for the PLTResolve stub and then for each PLT entry. */ | |
741 | #define PLTRESOLVE_RELOCS_SHLIB 0 | |
742 | #define PLTRESOLVE_RELOCS 2 | |
743 | #define PLT_NON_JUMP_SLOT_RELOCS 2 | |
744 | ||
23209a78 RM |
745 | /* Architecture-specific backend data for i386. */ |
746 | ||
747 | struct elf_i386_backend_data | |
748 | { | |
25e762b9 RM |
749 | /* Parameters describing PLT generation. */ |
750 | const struct elf_i386_plt_layout *plt; | |
751 | ||
23209a78 RM |
752 | /* Value used to fill the unused bytes of the first PLT entry. */ |
753 | bfd_byte plt0_pad_byte; | |
754 | ||
755 | /* True if the target system is VxWorks. */ | |
756 | int is_vxworks; | |
757 | }; | |
758 | ||
759 | #define get_elf_i386_backend_data(abfd) \ | |
760 | ((const struct elf_i386_backend_data *) \ | |
761 | get_elf_backend_data (abfd)->arch_data) | |
762 | ||
763 | /* These are the standard parameters. */ | |
764 | static const struct elf_i386_backend_data elf_i386_arch_bed = | |
765 | { | |
25e762b9 | 766 | &elf_i386_plt, /* plt */ |
23209a78 RM |
767 | 0, /* plt0_pad_byte */ |
768 | 0, /* is_vxworks */ | |
769 | }; | |
770 | ||
771 | #define elf_backend_arch_data &elf_i386_arch_bed | |
772 | ||
aec6b87e L |
773 | /* Is a undefined weak symbol which is resolved to 0. Reference to an |
774 | undefined weak symbol is resolved to 0 when building executable if | |
775 | it isn't dynamic and | |
776 | 1. Has non-GOT/non-PLT relocations in text section. Or | |
777 | 2. Has no GOT/PLT relocation. | |
778 | */ | |
e62b9723 | 779 | #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \ |
aec6b87e L |
780 | ((EH)->elf.root.type == bfd_link_hash_undefweak \ |
781 | && bfd_link_executable (INFO) \ | |
782 | && (elf_i386_hash_table (INFO)->interp == NULL \ | |
e62b9723 | 783 | || !(GOT_RELOC) \ |
aec6b87e L |
784 | || (EH)->has_non_got_reloc \ |
785 | || !(INFO)->dynamic_undefined_weak)) | |
786 | ||
252b5132 RH |
787 | /* i386 ELF linker hash entry. */ |
788 | ||
789 | struct elf_i386_link_hash_entry | |
790 | { | |
ebe50bae | 791 | struct elf_link_hash_entry elf; |
252b5132 | 792 | |
0c715baa | 793 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 794 | struct elf_dyn_relocs *dyn_relocs; |
13ae64f3 | 795 | |
37e55690 JJ |
796 | #define GOT_UNKNOWN 0 |
797 | #define GOT_NORMAL 1 | |
798 | #define GOT_TLS_GD 2 | |
799 | #define GOT_TLS_IE 4 | |
800 | #define GOT_TLS_IE_POS 5 | |
801 | #define GOT_TLS_IE_NEG 6 | |
802 | #define GOT_TLS_IE_BOTH 7 | |
67a4f2b7 AO |
803 | #define GOT_TLS_GDESC 8 |
804 | #define GOT_TLS_GD_BOTH_P(type) \ | |
805 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
806 | #define GOT_TLS_GD_P(type) \ | |
807 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
808 | #define GOT_TLS_GDESC_P(type) \ | |
809 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
810 | #define GOT_TLS_GD_ANY_P(type) \ | |
811 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
37e55690 | 812 | unsigned char tls_type; |
67a4f2b7 | 813 | |
d5597ebc L |
814 | /* Symbol is referenced by R_386_GOTOFF relocation. */ |
815 | unsigned int gotoff_ref : 1; | |
816 | ||
aec6b87e L |
817 | /* Symbol has GOT or PLT relocations. */ |
818 | unsigned int has_got_reloc : 1; | |
819 | ||
820 | /* Symbol has non-GOT/non-PLT relocations in text sections. */ | |
821 | unsigned int has_non_got_reloc : 1; | |
822 | ||
6eaa7fb5 L |
823 | /* 0: symbol isn't ___tls_get_addr. |
824 | 1: symbol is ___tls_get_addr. | |
825 | 2: symbol is unknown. */ | |
826 | unsigned int tls_get_addr : 2; | |
827 | ||
04ebc307 L |
828 | /* Reference count of C/C++ function pointer relocations in read-write |
829 | section which can be resolved at run-time. */ | |
830 | bfd_signed_vma func_pointer_refcount; | |
831 | ||
dd7e64d4 L |
832 | /* Information about the GOT PLT entry. Filled when there are both |
833 | GOT and PLT relocations against the same function. */ | |
834 | union gotplt_union plt_got; | |
835 | ||
67a4f2b7 AO |
836 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, |
837 | starting at the end of the jump table. */ | |
838 | bfd_vma tlsdesc_got; | |
13ae64f3 JJ |
839 | }; |
840 | ||
841 | #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent)) | |
842 | ||
843 | struct elf_i386_obj_tdata | |
844 | { | |
845 | struct elf_obj_tdata root; | |
846 | ||
847 | /* tls_type for each local got entry. */ | |
848 | char *local_got_tls_type; | |
67a4f2b7 AO |
849 | |
850 | /* GOTPLT entries for TLS descriptors. */ | |
851 | bfd_vma *local_tlsdesc_gotent; | |
252b5132 RH |
852 | }; |
853 | ||
13ae64f3 JJ |
854 | #define elf_i386_tdata(abfd) \ |
855 | ((struct elf_i386_obj_tdata *) (abfd)->tdata.any) | |
856 | ||
857 | #define elf_i386_local_got_tls_type(abfd) \ | |
858 | (elf_i386_tdata (abfd)->local_got_tls_type) | |
859 | ||
67a4f2b7 AO |
860 | #define elf_i386_local_tlsdesc_gotent(abfd) \ |
861 | (elf_i386_tdata (abfd)->local_tlsdesc_gotent) | |
862 | ||
0ffa91dd NC |
863 | #define is_i386_elf(bfd) \ |
864 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
865 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 866 | && elf_object_id (bfd) == I386_ELF_DATA) |
0ffa91dd | 867 | |
b34976b6 | 868 | static bfd_boolean |
55fd94b0 | 869 | elf_i386_mkobject (bfd *abfd) |
13ae64f3 | 870 | { |
0ffa91dd | 871 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata), |
4dfe6ac6 | 872 | I386_ELF_DATA); |
13ae64f3 | 873 | } |
cedb70c5 | 874 | |
252b5132 RH |
875 | /* i386 ELF linker hash table. */ |
876 | ||
877 | struct elf_i386_link_hash_table | |
878 | { | |
ebe50bae | 879 | struct elf_link_hash_table elf; |
252b5132 | 880 | |
6725bdbf | 881 | /* Short-cuts to get to dynamic linker sections. */ |
aec6b87e | 882 | asection *interp; |
e41b3a13 | 883 | asection *plt_eh_frame; |
dd7e64d4 | 884 | asection *plt_got; |
fff53dae | 885 | asection *plt_got_eh_frame; |
9635fe29 | 886 | |
4dfe6ac6 NC |
887 | union |
888 | { | |
13ae64f3 JJ |
889 | bfd_signed_vma refcount; |
890 | bfd_vma offset; | |
891 | } tls_ldm_got; | |
892 | ||
67a4f2b7 AO |
893 | /* The amount of space used by the reserved portion of the sgotplt |
894 | section, plus whatever space is used by the jump slots. */ | |
895 | bfd_vma sgotplt_jump_table_size; | |
896 | ||
87d72d41 AM |
897 | /* Small local sym cache. */ |
898 | struct sym_cache sym_cache; | |
9f03412a AO |
899 | |
900 | /* _TLS_MODULE_BASE_ symbol. */ | |
901 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
902 | |
903 | /* Used by local STT_GNU_IFUNC symbols. */ | |
904 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
905 | void * loc_hash_memory; |
906 | ||
907 | /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */ | |
908 | asection *srelplt2; | |
909 | ||
4dfe6ac6 NC |
910 | /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */ |
911 | bfd_vma next_tls_desc_index; | |
e1f98742 L |
912 | |
913 | /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */ | |
914 | bfd_vma next_jump_slot_index; | |
915 | ||
916 | /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */ | |
917 | bfd_vma next_irelative_index; | |
2df3368d L |
918 | |
919 | /* TRUE if there are dynamic relocs against IFUNC symbols that apply | |
920 | to read-only sections. */ | |
921 | bfd_boolean readonly_dynrelocs_against_ifunc; | |
6725bdbf | 922 | }; |
252b5132 RH |
923 | |
924 | /* Get the i386 ELF linker hash table from a link_info structure. */ | |
925 | ||
926 | #define elf_i386_hash_table(p) \ | |
4dfe6ac6 NC |
927 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
928 | == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL) | |
252b5132 | 929 | |
67a4f2b7 | 930 | #define elf_i386_compute_jump_table_size(htab) \ |
998d811a | 931 | ((htab)->elf.srelplt->reloc_count * 4) |
67a4f2b7 | 932 | |
252b5132 RH |
933 | /* Create an entry in an i386 ELF linker hash table. */ |
934 | ||
935 | static struct bfd_hash_entry * | |
eb4ff4d6 L |
936 | elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry, |
937 | struct bfd_hash_table *table, | |
938 | const char *string) | |
252b5132 | 939 | { |
252b5132 RH |
940 | /* Allocate the structure if it has not already been allocated by a |
941 | subclass. */ | |
ebe50bae AM |
942 | if (entry == NULL) |
943 | { | |
a50b1753 NC |
944 | entry = (struct bfd_hash_entry *) |
945 | bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry)); | |
ebe50bae AM |
946 | if (entry == NULL) |
947 | return entry; | |
948 | } | |
252b5132 RH |
949 | |
950 | /* Call the allocation method of the superclass. */ | |
ebe50bae AM |
951 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
952 | if (entry != NULL) | |
252b5132 | 953 | { |
ebe50bae AM |
954 | struct elf_i386_link_hash_entry *eh; |
955 | ||
956 | eh = (struct elf_i386_link_hash_entry *) entry; | |
957 | eh->dyn_relocs = NULL; | |
13ae64f3 | 958 | eh->tls_type = GOT_UNKNOWN; |
d5597ebc | 959 | eh->gotoff_ref = 0; |
aec6b87e L |
960 | eh->has_got_reloc = 0; |
961 | eh->has_non_got_reloc = 0; | |
6eaa7fb5 | 962 | eh->tls_get_addr = 2; |
04ebc307 | 963 | eh->func_pointer_refcount = 0; |
dd7e64d4 | 964 | eh->plt_got.offset = (bfd_vma) -1; |
67a4f2b7 | 965 | eh->tlsdesc_got = (bfd_vma) -1; |
252b5132 RH |
966 | } |
967 | ||
ebe50bae | 968 | return entry; |
252b5132 RH |
969 | } |
970 | ||
c25bc9fc L |
971 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
972 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
973 | as global symbol. We reuse indx and dynstr_index for local symbol | |
974 | hash since they aren't used by global symbols in this backend. */ | |
975 | ||
976 | static hashval_t | |
977 | elf_i386_local_htab_hash (const void *ptr) | |
978 | { | |
979 | struct elf_link_hash_entry *h | |
980 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 981 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
982 | } |
983 | ||
984 | /* Compare local hash entries. */ | |
985 | ||
986 | static int | |
987 | elf_i386_local_htab_eq (const void *ptr1, const void *ptr2) | |
988 | { | |
989 | struct elf_link_hash_entry *h1 | |
990 | = (struct elf_link_hash_entry *) ptr1; | |
991 | struct elf_link_hash_entry *h2 | |
992 | = (struct elf_link_hash_entry *) ptr2; | |
993 | ||
994 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
995 | } | |
996 | ||
997 | /* Find and/or create a hash entry for local symbol. */ | |
998 | ||
999 | static struct elf_link_hash_entry * | |
1000 | elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab, | |
1001 | bfd *abfd, const Elf_Internal_Rela *rel, | |
1002 | bfd_boolean create) | |
1003 | { | |
1004 | struct elf_i386_link_hash_entry e, *ret; | |
1005 | asection *sec = abfd->sections; | |
d2149d72 L |
1006 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
1007 | ELF32_R_SYM (rel->r_info)); | |
c25bc9fc L |
1008 | void **slot; |
1009 | ||
1010 | e.elf.indx = sec->id; | |
1011 | e.elf.dynstr_index = ELF32_R_SYM (rel->r_info); | |
1012 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, | |
1013 | create ? INSERT : NO_INSERT); | |
1014 | ||
1015 | if (!slot) | |
1016 | return NULL; | |
1017 | ||
1018 | if (*slot) | |
1019 | { | |
1020 | ret = (struct elf_i386_link_hash_entry *) *slot; | |
1021 | return &ret->elf; | |
1022 | } | |
1023 | ||
1024 | ret = (struct elf_i386_link_hash_entry *) | |
1025 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, | |
1026 | sizeof (struct elf_i386_link_hash_entry)); | |
1027 | if (ret) | |
1028 | { | |
1029 | memset (ret, 0, sizeof (*ret)); | |
1030 | ret->elf.indx = sec->id; | |
1031 | ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info); | |
1032 | ret->elf.dynindx = -1; | |
04ebc307 | 1033 | ret->func_pointer_refcount = 0; |
dd7e64d4 | 1034 | ret->plt_got.offset = (bfd_vma) -1; |
c25bc9fc L |
1035 | *slot = ret; |
1036 | } | |
1037 | return &ret->elf; | |
1038 | } | |
1039 | ||
68faa637 AM |
1040 | /* Destroy an i386 ELF linker hash table. */ |
1041 | ||
1042 | static void | |
d495ab0d | 1043 | elf_i386_link_hash_table_free (bfd *obfd) |
68faa637 AM |
1044 | { |
1045 | struct elf_i386_link_hash_table *htab | |
d495ab0d | 1046 | = (struct elf_i386_link_hash_table *) obfd->link.hash; |
68faa637 AM |
1047 | |
1048 | if (htab->loc_hash_table) | |
1049 | htab_delete (htab->loc_hash_table); | |
1050 | if (htab->loc_hash_memory) | |
1051 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
d495ab0d | 1052 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
1053 | } |
1054 | ||
252b5132 RH |
1055 | /* Create an i386 ELF linker hash table. */ |
1056 | ||
1057 | static struct bfd_link_hash_table * | |
55fd94b0 | 1058 | elf_i386_link_hash_table_create (bfd *abfd) |
252b5132 RH |
1059 | { |
1060 | struct elf_i386_link_hash_table *ret; | |
dc810e39 | 1061 | bfd_size_type amt = sizeof (struct elf_i386_link_hash_table); |
252b5132 | 1062 | |
7bf52ea2 | 1063 | ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt); |
ebe50bae | 1064 | if (ret == NULL) |
252b5132 RH |
1065 | return NULL; |
1066 | ||
eb4ff4d6 L |
1067 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
1068 | elf_i386_link_hash_newfunc, | |
4dfe6ac6 NC |
1069 | sizeof (struct elf_i386_link_hash_entry), |
1070 | I386_ELF_DATA)) | |
252b5132 | 1071 | { |
e2d34d7d | 1072 | free (ret); |
252b5132 RH |
1073 | return NULL; |
1074 | } | |
1075 | ||
c25bc9fc L |
1076 | ret->loc_hash_table = htab_try_create (1024, |
1077 | elf_i386_local_htab_hash, | |
1078 | elf_i386_local_htab_eq, | |
1079 | NULL); | |
1080 | ret->loc_hash_memory = objalloc_create (); | |
1081 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
1082 | { | |
d495ab0d | 1083 | elf_i386_link_hash_table_free (abfd); |
c25bc9fc L |
1084 | return NULL; |
1085 | } | |
d495ab0d | 1086 | ret->elf.root.hash_table_free = elf_i386_link_hash_table_free; |
c25bc9fc | 1087 | |
ebe50bae | 1088 | return &ret->elf.root; |
252b5132 RH |
1089 | } |
1090 | ||
6725bdbf AM |
1091 | /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and |
1092 | .rel.bss sections in DYNOBJ, and set up shortcuts to them in our | |
1093 | hash table. */ | |
1094 | ||
b34976b6 | 1095 | static bfd_boolean |
55fd94b0 | 1096 | elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
6725bdbf AM |
1097 | { |
1098 | struct elf_i386_link_hash_table *htab; | |
1099 | ||
6725bdbf | 1100 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 1101 | return FALSE; |
6725bdbf | 1102 | |
6de2ae4a | 1103 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1104 | if (htab == NULL) |
1105 | return FALSE; | |
1106 | ||
493f652c L |
1107 | /* Set the contents of the .interp section to the interpreter. */ |
1108 | if (bfd_link_executable (info) && !info->nointerp) | |
1109 | { | |
1110 | asection *s = bfd_get_linker_section (dynobj, ".interp"); | |
1111 | if (s == NULL) | |
1112 | abort (); | |
1113 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
1114 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1115 | htab->interp = s; | |
1116 | } | |
1117 | ||
23209a78 | 1118 | if (get_elf_i386_backend_data (dynobj)->is_vxworks |
6de2ae4a L |
1119 | && !elf_vxworks_create_dynamic_sections (dynobj, info, |
1120 | &htab->srelplt2)) | |
711de32c | 1121 | return FALSE; |
eac338cf | 1122 | |
e41b3a13 | 1123 | if (!info->no_ld_generated_unwind_info |
2fe0fd06 | 1124 | && htab->plt_eh_frame == NULL |
e4de50d4 | 1125 | && htab->elf.splt != NULL) |
e41b3a13 | 1126 | { |
bbf96e4e L |
1127 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
1128 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1129 | | SEC_LINKER_CREATED); | |
e41b3a13 | 1130 | htab->plt_eh_frame |
bbf96e4e | 1131 | = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags); |
e41b3a13 JJ |
1132 | if (htab->plt_eh_frame == NULL |
1133 | || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2)) | |
1134 | return FALSE; | |
e41b3a13 JJ |
1135 | } |
1136 | ||
b34976b6 | 1137 | return TRUE; |
6725bdbf AM |
1138 | } |
1139 | ||
ebe50bae AM |
1140 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
1141 | ||
51b64d56 | 1142 | static void |
fcfa13d2 | 1143 | elf_i386_copy_indirect_symbol (struct bfd_link_info *info, |
55fd94b0 AM |
1144 | struct elf_link_hash_entry *dir, |
1145 | struct elf_link_hash_entry *ind) | |
ebe50bae AM |
1146 | { |
1147 | struct elf_i386_link_hash_entry *edir, *eind; | |
1148 | ||
1149 | edir = (struct elf_i386_link_hash_entry *) dir; | |
1150 | eind = (struct elf_i386_link_hash_entry *) ind; | |
1151 | ||
bbd7ec4a | 1152 | if (eind->dyn_relocs != NULL) |
ebe50bae | 1153 | { |
bbd7ec4a AM |
1154 | if (edir->dyn_relocs != NULL) |
1155 | { | |
e03a8ed8 L |
1156 | struct elf_dyn_relocs **pp; |
1157 | struct elf_dyn_relocs *p; | |
bbd7ec4a | 1158 | |
fcfa13d2 | 1159 | /* Add reloc counts against the indirect sym to the direct sym |
bbd7ec4a AM |
1160 | list. Merge any entries against the same section. */ |
1161 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1162 | { | |
e03a8ed8 | 1163 | struct elf_dyn_relocs *q; |
bbd7ec4a AM |
1164 | |
1165 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1166 | if (q->sec == p->sec) | |
1167 | { | |
1168 | q->pc_count += p->pc_count; | |
1169 | q->count += p->count; | |
1170 | *pp = p->next; | |
1171 | break; | |
1172 | } | |
1173 | if (q == NULL) | |
1174 | pp = &p->next; | |
1175 | } | |
1176 | *pp = edir->dyn_relocs; | |
1177 | } | |
1178 | ||
ebe50bae AM |
1179 | edir->dyn_relocs = eind->dyn_relocs; |
1180 | eind->dyn_relocs = NULL; | |
1181 | } | |
ebe50bae | 1182 | |
cd67d266 JJ |
1183 | if (ind->root.type == bfd_link_hash_indirect |
1184 | && dir->got.refcount <= 0) | |
1185 | { | |
1186 | edir->tls_type = eind->tls_type; | |
1187 | eind->tls_type = GOT_UNKNOWN; | |
1188 | } | |
81848ca0 | 1189 | |
d5597ebc L |
1190 | /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will |
1191 | generate a R_386_COPY reloc. */ | |
1192 | edir->gotoff_ref |= eind->gotoff_ref; | |
1193 | ||
aec6b87e L |
1194 | edir->has_got_reloc |= eind->has_got_reloc; |
1195 | edir->has_non_got_reloc |= eind->has_non_got_reloc; | |
1196 | ||
81848ca0 AM |
1197 | if (ELIMINATE_COPY_RELOCS |
1198 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1199 | && dir->dynamic_adjusted) |
1200 | { | |
1201 | /* If called to transfer flags for a weakdef during processing | |
1202 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1203 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
e81830c5 AM |
1204 | if (dir->versioned != versioned_hidden) |
1205 | dir->ref_dynamic |= ind->ref_dynamic; | |
f5385ebf AM |
1206 | dir->ref_regular |= ind->ref_regular; |
1207 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1208 | dir->needs_plt |= ind->needs_plt; | |
1209 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1210 | } | |
81848ca0 | 1211 | else |
04ebc307 L |
1212 | { |
1213 | if (eind->func_pointer_refcount > 0) | |
1214 | { | |
1215 | edir->func_pointer_refcount += eind->func_pointer_refcount; | |
1216 | eind->func_pointer_refcount = 0; | |
1217 | } | |
1218 | ||
1219 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
1220 | } | |
ebe50bae AM |
1221 | } |
1222 | ||
142411ca L |
1223 | /* Return TRUE if the TLS access code sequence support transition |
1224 | from R_TYPE. */ | |
1225 | ||
1226 | static bfd_boolean | |
bedfd056 | 1227 | elf_i386_check_tls_transition (asection *sec, |
142411ca L |
1228 | bfd_byte *contents, |
1229 | Elf_Internal_Shdr *symtab_hdr, | |
1230 | struct elf_link_hash_entry **sym_hashes, | |
1231 | unsigned int r_type, | |
1232 | const Elf_Internal_Rela *rel, | |
1233 | const Elf_Internal_Rela *relend) | |
13ae64f3 | 1234 | { |
6eaa7fb5 | 1235 | unsigned int val, type, reg; |
142411ca L |
1236 | unsigned long r_symndx; |
1237 | struct elf_link_hash_entry *h; | |
1238 | bfd_vma offset; | |
6eaa7fb5 L |
1239 | bfd_byte *call; |
1240 | bfd_boolean indirect_call, tls_get_addr; | |
142411ca | 1241 | |
142411ca | 1242 | offset = rel->r_offset; |
13ae64f3 | 1243 | switch (r_type) |
142411ca L |
1244 | { |
1245 | case R_386_TLS_GD: | |
1246 | case R_386_TLS_LDM: | |
1247 | if (offset < 2 || (rel + 1) >= relend) | |
1248 | return FALSE; | |
1249 | ||
6eaa7fb5 L |
1250 | indirect_call = FALSE; |
1251 | call = contents + offset + 4; | |
1252 | val = *(call - 5); | |
1253 | type = *(call - 6); | |
142411ca L |
1254 | if (r_type == R_386_TLS_GD) |
1255 | { | |
09e8c3bf | 1256 | /* Check transition from GD access model. Only |
6eaa7fb5 L |
1257 | leal foo@tlsgd(,%ebx,1), %eax |
1258 | call ___tls_get_addr@PLT | |
1259 | or | |
1260 | leal foo@tlsgd(%ebx) %eax | |
1261 | call ___tls_get_addr@PLT | |
1262 | nop | |
1263 | or | |
1264 | leal foo@tlsgd(%reg), %eax | |
1265 | call *___tls_get_addr@GOT(%reg) | |
1266 | which may be converted to | |
1267 | addr32 call ___tls_get_addr | |
142411ca | 1268 | can transit to different access model. */ |
6eaa7fb5 L |
1269 | if ((offset + 10) > sec->size |
1270 | || (type != 0x8d && type != 0x04)) | |
142411ca L |
1271 | return FALSE; |
1272 | ||
142411ca L |
1273 | if (type == 0x04) |
1274 | { | |
6eaa7fb5 L |
1275 | /* leal foo@tlsgd(,%ebx,1), %eax |
1276 | call ___tls_get_addr@PLT */ | |
142411ca L |
1277 | if (offset < 3) |
1278 | return FALSE; | |
1279 | ||
6eaa7fb5 L |
1280 | if (*(call - 7) != 0x8d |
1281 | || val != 0x1d | |
1282 | || call[0] != 0xe8) | |
142411ca L |
1283 | return FALSE; |
1284 | } | |
1285 | else | |
1286 | { | |
6eaa7fb5 L |
1287 | /* This must be |
1288 | leal foo@tlsgd(%ebx), %eax | |
1289 | call ___tls_get_addr@PLT | |
1290 | nop | |
1291 | or | |
1292 | leal foo@tlsgd(%reg), %eax | |
1293 | call *___tls_get_addr@GOT(%reg) | |
1294 | which may be converted to | |
1295 | addr32 call ___tls_get_addr | |
1296 | ||
1297 | %eax can't be used as the GOT base register since it | |
1298 | is used to pass parameter to ___tls_get_addr. */ | |
1299 | reg = val & 7; | |
1300 | if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0) | |
142411ca L |
1301 | return FALSE; |
1302 | ||
6eaa7fb5 L |
1303 | indirect_call = call[0] == 0xff; |
1304 | if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90) | |
1305 | && !(call[0] == 0x67 && call[1] == 0xe8) | |
1306 | && !(indirect_call | |
1307 | && (call[1] & 0xf8) == 0x90 | |
1308 | && (call[1] & 0x7) == reg)) | |
142411ca L |
1309 | return FALSE; |
1310 | } | |
1311 | } | |
1312 | else | |
1313 | { | |
1314 | /* Check transition from LD access model. Only | |
6eaa7fb5 L |
1315 | leal foo@tlsldm(%ebx), %eax |
1316 | call ___tls_get_addr@PLT | |
1317 | or | |
1318 | leal foo@tlsldm(%reg), %eax | |
1319 | call *___tls_get_addr@GOT(%reg) | |
1320 | which may be converted to | |
1321 | addr32 call ___tls_get_addr | |
142411ca L |
1322 | can transit to different access model. */ |
1323 | if (type != 0x8d || (offset + 9) > sec->size) | |
1324 | return FALSE; | |
1325 | ||
6eaa7fb5 L |
1326 | /* %eax can't be used as the GOT base register since it is |
1327 | used to pass parameter to ___tls_get_addr. */ | |
1328 | reg = val & 7; | |
1329 | if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0) | |
142411ca | 1330 | return FALSE; |
142411ca | 1331 | |
6eaa7fb5 L |
1332 | indirect_call = call[0] == 0xff; |
1333 | if (!(reg == 3 && call[0] == 0xe8) | |
1334 | && !(call[0] == 0x67 && call[1] == 0xe8) | |
1335 | && !(indirect_call | |
1336 | && (call[1] & 0xf8) == 0x90 | |
1337 | && (call[1] & 0x7) == reg)) | |
1338 | return FALSE; | |
1339 | } | |
142411ca L |
1340 | |
1341 | r_symndx = ELF32_R_SYM (rel[1].r_info); | |
1342 | if (r_symndx < symtab_hdr->sh_info) | |
1343 | return FALSE; | |
1344 | ||
6eaa7fb5 | 1345 | tls_get_addr = FALSE; |
142411ca | 1346 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
6eaa7fb5 L |
1347 | if (h != NULL && h->root.root.string != NULL) |
1348 | { | |
1349 | struct elf_i386_link_hash_entry *eh | |
1350 | = (struct elf_i386_link_hash_entry *) h; | |
1351 | tls_get_addr = eh->tls_get_addr == 1; | |
1352 | if (eh->tls_get_addr > 1) | |
1353 | { | |
1354 | /* Use strncmp to check ___tls_get_addr since | |
1355 | ___tls_get_addr may be versioned. */ | |
1356 | if (strncmp (h->root.root.string, "___tls_get_addr", 15) | |
1357 | == 0) | |
1358 | { | |
1359 | eh->tls_get_addr = 1; | |
1360 | tls_get_addr = TRUE; | |
1361 | } | |
1362 | else | |
1363 | eh->tls_get_addr = 0; | |
1364 | } | |
1365 | } | |
1366 | ||
1367 | if (!tls_get_addr) | |
1368 | return FALSE; | |
1369 | else if (indirect_call) | |
1370 | return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X); | |
1371 | else | |
1372 | return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32 | |
1373 | || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); | |
142411ca L |
1374 | |
1375 | case R_386_TLS_IE: | |
1376 | /* Check transition from IE access model: | |
1377 | movl foo@indntpoff(%rip), %eax | |
1378 | movl foo@indntpoff(%rip), %reg | |
1379 | addl foo@indntpoff(%rip), %reg | |
1380 | */ | |
1381 | ||
1382 | if (offset < 1 || (offset + 4) > sec->size) | |
1383 | return FALSE; | |
1384 | ||
1385 | /* Check "movl foo@tpoff(%rip), %eax" first. */ | |
1386 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1387 | if (val == 0xa1) | |
1388 | return TRUE; | |
1389 | ||
1390 | if (offset < 2) | |
1391 | return FALSE; | |
1392 | ||
1393 | /* Check movl|addl foo@tpoff(%rip), %reg. */ | |
1394 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1395 | return ((type == 0x8b || type == 0x03) | |
1396 | && (val & 0xc7) == 0x05); | |
1397 | ||
1398 | case R_386_TLS_GOTIE: | |
1399 | case R_386_TLS_IE_32: | |
1400 | /* Check transition from {IE_32,GOTIE} access model: | |
1401 | subl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1402 | movl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1403 | addl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1404 | */ | |
1405 | ||
1406 | if (offset < 2 || (offset + 4) > sec->size) | |
1407 | return FALSE; | |
1408 | ||
1409 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1410 | if ((val & 0xc0) != 0x80 || (val & 7) == 4) | |
1411 | return FALSE; | |
1412 | ||
1413 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1414 | return type == 0x8b || type == 0x2b || type == 0x03; | |
1415 | ||
1416 | case R_386_TLS_GOTDESC: | |
1417 | /* Check transition from GDesc access model: | |
1418 | leal x@tlsdesc(%ebx), %eax | |
1419 | ||
1420 | Make sure it's a leal adding ebx to a 32-bit offset | |
1421 | into any register, although it's probably almost always | |
1422 | going to be eax. */ | |
1423 | ||
1424 | if (offset < 2 || (offset + 4) > sec->size) | |
1425 | return FALSE; | |
1426 | ||
1427 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1428 | return FALSE; | |
1429 | ||
1430 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1431 | return (val & 0xc7) == 0x83; | |
1432 | ||
1433 | case R_386_TLS_DESC_CALL: | |
1434 | /* Check transition from GDesc access model: | |
6eaa7fb5 | 1435 | call *x@tlsdesc(%eax) |
142411ca L |
1436 | */ |
1437 | if (offset + 2 <= sec->size) | |
1438 | { | |
6eaa7fb5 L |
1439 | /* Make sure that it's a call *x@tlsdesc(%eax). */ |
1440 | call = contents + offset; | |
1441 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1442 | } |
1443 | ||
1444 | return FALSE; | |
1445 | ||
1446 | default: | |
1447 | abort (); | |
1448 | } | |
1449 | } | |
1450 | ||
1451 | /* Return TRUE if the TLS access transition is OK or no transition | |
1452 | will be performed. Update R_TYPE if there is a transition. */ | |
1453 | ||
1454 | static bfd_boolean | |
1455 | elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd, | |
1456 | asection *sec, bfd_byte *contents, | |
1457 | Elf_Internal_Shdr *symtab_hdr, | |
1458 | struct elf_link_hash_entry **sym_hashes, | |
1459 | unsigned int *r_type, int tls_type, | |
1460 | const Elf_Internal_Rela *rel, | |
1461 | const Elf_Internal_Rela *relend, | |
4c544807 | 1462 | struct elf_link_hash_entry *h, |
bedfd056 L |
1463 | unsigned long r_symndx, |
1464 | bfd_boolean from_relocate_section) | |
142411ca L |
1465 | { |
1466 | unsigned int from_type = *r_type; | |
1467 | unsigned int to_type = from_type; | |
1468 | bfd_boolean check = TRUE; | |
1469 | ||
bb1cb422 L |
1470 | /* Skip TLS transition for functions. */ |
1471 | if (h != NULL | |
1472 | && (h->type == STT_FUNC | |
1473 | || h->type == STT_GNU_IFUNC)) | |
1474 | return TRUE; | |
1475 | ||
142411ca | 1476 | switch (from_type) |
13ae64f3 JJ |
1477 | { |
1478 | case R_386_TLS_GD: | |
67a4f2b7 AO |
1479 | case R_386_TLS_GOTDESC: |
1480 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 1481 | case R_386_TLS_IE_32: |
37e55690 JJ |
1482 | case R_386_TLS_IE: |
1483 | case R_386_TLS_GOTIE: | |
0e1862bb | 1484 | if (bfd_link_executable (info)) |
142411ca L |
1485 | { |
1486 | if (h == NULL) | |
1487 | to_type = R_386_TLS_LE_32; | |
1488 | else if (from_type != R_386_TLS_IE | |
1489 | && from_type != R_386_TLS_GOTIE) | |
1490 | to_type = R_386_TLS_IE_32; | |
1491 | } | |
1492 | ||
bedfd056 L |
1493 | /* When we are called from elf_i386_relocate_section, there may |
1494 | be additional transitions based on TLS_TYPE. */ | |
1495 | if (from_relocate_section) | |
142411ca L |
1496 | { |
1497 | unsigned int new_to_type = to_type; | |
1498 | ||
0e1862bb | 1499 | if (bfd_link_executable (info) |
142411ca L |
1500 | && h != NULL |
1501 | && h->dynindx == -1 | |
1502 | && (tls_type & GOT_TLS_IE)) | |
1503 | new_to_type = R_386_TLS_LE_32; | |
1504 | ||
1505 | if (to_type == R_386_TLS_GD | |
1506 | || to_type == R_386_TLS_GOTDESC | |
1507 | || to_type == R_386_TLS_DESC_CALL) | |
1508 | { | |
1509 | if (tls_type == GOT_TLS_IE_POS) | |
1510 | new_to_type = R_386_TLS_GOTIE; | |
1511 | else if (tls_type & GOT_TLS_IE) | |
1512 | new_to_type = R_386_TLS_IE_32; | |
1513 | } | |
1514 | ||
1515 | /* We checked the transition before when we were called from | |
1516 | elf_i386_check_relocs. We only want to check the new | |
1517 | transition which hasn't been checked before. */ | |
1518 | check = new_to_type != to_type && from_type == to_type; | |
1519 | to_type = new_to_type; | |
1520 | } | |
1521 | ||
1522 | break; | |
1523 | ||
13ae64f3 | 1524 | case R_386_TLS_LDM: |
0e1862bb | 1525 | if (bfd_link_executable (info)) |
142411ca L |
1526 | to_type = R_386_TLS_LE_32; |
1527 | break; | |
1528 | ||
1529 | default: | |
1530 | return TRUE; | |
1531 | } | |
1532 | ||
1533 | /* Return TRUE if there is no transition. */ | |
1534 | if (from_type == to_type) | |
1535 | return TRUE; | |
1536 | ||
1537 | /* Check if the transition can be performed. */ | |
1538 | if (check | |
bedfd056 | 1539 | && ! elf_i386_check_tls_transition (sec, contents, |
142411ca L |
1540 | symtab_hdr, sym_hashes, |
1541 | from_type, rel, relend)) | |
1542 | { | |
2f629d23 | 1543 | reloc_howto_type *from, *to; |
4c544807 | 1544 | const char *name; |
142411ca L |
1545 | |
1546 | from = elf_i386_rtype_to_howto (abfd, from_type); | |
1547 | to = elf_i386_rtype_to_howto (abfd, to_type); | |
1548 | ||
4c544807 L |
1549 | if (h) |
1550 | name = h->root.root.string; | |
1551 | else | |
1552 | { | |
4c544807 | 1553 | struct elf_i386_link_hash_table *htab; |
4dfe6ac6 | 1554 | |
4c544807 | 1555 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1556 | if (htab == NULL) |
1557 | name = "*unknown*"; | |
1558 | else | |
1559 | { | |
1560 | Elf_Internal_Sym *isym; | |
1561 | ||
1562 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1563 | abfd, r_symndx); | |
1564 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1565 | } | |
4c544807 L |
1566 | } |
1567 | ||
4eca0228 | 1568 | _bfd_error_handler |
695344c0 | 1569 | /* xgettext:c-format */ |
142411ca L |
1570 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " |
1571 | "in section `%A' failed"), | |
4c544807 | 1572 | abfd, sec, from->name, to->name, name, |
142411ca L |
1573 | (unsigned long) rel->r_offset); |
1574 | bfd_set_error (bfd_error_bad_value); | |
1575 | return FALSE; | |
13ae64f3 JJ |
1576 | } |
1577 | ||
142411ca L |
1578 | *r_type = to_type; |
1579 | return TRUE; | |
13ae64f3 JJ |
1580 | } |
1581 | ||
c175a657 L |
1582 | /* With the local symbol, foo, we convert |
1583 | mov foo@GOT[(%reg1)], %reg2 | |
1584 | to | |
1585 | lea foo[@GOTOFF(%reg1)], %reg2 | |
1586 | and convert | |
1587 | call/jmp *foo@GOT[(%reg)] | |
1588 | to | |
1589 | nop call foo/jmp foo nop | |
1590 | When PIC is false, convert | |
1591 | test %reg1, foo@GOT[(%reg2)] | |
1592 | to | |
1593 | test $foo, %reg1 | |
1594 | and convert | |
1595 | binop foo@GOT[(%reg1)], %reg2 | |
1596 | to | |
1597 | binop $foo, %reg2 | |
1598 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1599 | instructions. */ | |
1600 | ||
1601 | static | |
1602 | bfd_boolean | |
1603 | elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr, | |
1604 | bfd_byte *contents, | |
1605 | Elf_Internal_Rela *irel, | |
1606 | struct elf_link_hash_entry *h, | |
1607 | bfd_boolean *converted, | |
1608 | struct bfd_link_info *link_info) | |
1609 | { | |
1610 | struct elf_i386_link_hash_table *htab; | |
1611 | unsigned int opcode; | |
1612 | unsigned int modrm; | |
1613 | bfd_boolean baseless; | |
1614 | Elf_Internal_Sym *isym; | |
1615 | unsigned int addend; | |
1616 | unsigned int nop; | |
1617 | bfd_vma nop_offset; | |
1618 | bfd_boolean is_pic; | |
1619 | bfd_boolean to_reloc_32; | |
1620 | unsigned int r_type; | |
1621 | unsigned int r_symndx; | |
1622 | bfd_vma roff = irel->r_offset; | |
1623 | ||
1624 | if (roff < 2) | |
1625 | return TRUE; | |
1626 | ||
7d4d9709 | 1627 | /* Addend for R_386_GOT32X relocations must be 0. */ |
c175a657 L |
1628 | addend = bfd_get_32 (abfd, contents + roff); |
1629 | if (addend != 0) | |
1630 | return TRUE; | |
1631 | ||
1632 | htab = elf_i386_hash_table (link_info); | |
1633 | is_pic = bfd_link_pic (link_info); | |
1634 | ||
1635 | r_type = ELF32_R_TYPE (irel->r_info); | |
1636 | r_symndx = ELF32_R_SYM (irel->r_info); | |
1637 | ||
1638 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1639 | baseless = (modrm & 0xc7) == 0x5; | |
1640 | ||
7d4d9709 | 1641 | if (baseless && is_pic) |
c175a657 L |
1642 | { |
1643 | /* For PIC, disallow R_386_GOT32X without a base register | |
7d4d9709 | 1644 | since we don't know what the GOT base is. */ |
c175a657 L |
1645 | const char *name; |
1646 | ||
1647 | if (h == NULL) | |
1648 | { | |
1649 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, | |
1650 | r_symndx); | |
1651 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1652 | } | |
1653 | else | |
1654 | name = h->root.root.string; | |
1655 | ||
4eca0228 | 1656 | _bfd_error_handler |
695344c0 | 1657 | /* xgettext:c-format */ |
c175a657 L |
1658 | (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base register can not be used when making a shared object"), |
1659 | abfd, name); | |
1660 | return FALSE; | |
1661 | } | |
1662 | ||
1663 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1664 | ||
c175a657 L |
1665 | /* Convert to R_386_32 if PIC is false or there is no base |
1666 | register. */ | |
1667 | to_reloc_32 = !is_pic || baseless; | |
1668 | ||
7d4d9709 L |
1669 | /* Try to convert R_386_GOT32X. Get the symbol referred to by the |
1670 | reloc. */ | |
c175a657 L |
1671 | if (h == NULL) |
1672 | { | |
1673 | if (opcode == 0x0ff) | |
1674 | /* Convert "call/jmp *foo@GOT[(%reg)]". */ | |
1675 | goto convert_branch; | |
1676 | else | |
1677 | /* Convert "mov foo@GOT[(%reg1)], %reg2", | |
1678 | "test %reg1, foo@GOT(%reg2)" and | |
1679 | "binop foo@GOT[(%reg1)], %reg2". */ | |
1680 | goto convert_load; | |
1681 | } | |
1682 | ||
1683 | /* Undefined weak symbol is only bound locally in executable | |
1684 | and its reference is resolved as 0. */ | |
1685 | if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, TRUE, | |
1686 | elf_i386_hash_entry (h))) | |
1687 | { | |
1688 | if (opcode == 0xff) | |
1689 | { | |
1690 | /* No direct branch to 0 for PIC. */ | |
1691 | if (is_pic) | |
1692 | return TRUE; | |
1693 | else | |
1694 | goto convert_branch; | |
1695 | } | |
1696 | else | |
1697 | { | |
1698 | /* We can convert load of address 0 to R_386_32. */ | |
1699 | to_reloc_32 = TRUE; | |
1700 | goto convert_load; | |
1701 | } | |
1702 | } | |
1703 | ||
1704 | if (opcode == 0xff) | |
1705 | { | |
1706 | /* We have "call/jmp *foo@GOT[(%reg)]". */ | |
1707 | if ((h->root.type == bfd_link_hash_defined | |
1708 | || h->root.type == bfd_link_hash_defweak) | |
1709 | && SYMBOL_REFERENCES_LOCAL (link_info, h)) | |
1710 | { | |
1711 | /* The function is locally defined. */ | |
1712 | convert_branch: | |
1713 | /* Convert R_386_GOT32X to R_386_PC32. */ | |
1714 | if (modrm == 0x15 || (modrm & 0xf8) == 0x90) | |
1715 | { | |
6eaa7fb5 L |
1716 | struct elf_i386_link_hash_entry *eh |
1717 | = (struct elf_i386_link_hash_entry *) h; | |
1718 | ||
c175a657 L |
1719 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
1720 | is a nop prefix. */ | |
1721 | modrm = 0xe8; | |
6eaa7fb5 L |
1722 | /* To support TLS optimization, always use addr32 prefix |
1723 | for "call *___tls_get_addr@GOT(%reg)". */ | |
1724 | if (eh && eh->tls_get_addr == 1) | |
c175a657 | 1725 | { |
6eaa7fb5 L |
1726 | nop = 0x67; |
1727 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1728 | } |
1729 | else | |
6eaa7fb5 L |
1730 | { |
1731 | nop = link_info->call_nop_byte; | |
1732 | if (link_info->call_nop_as_suffix) | |
1733 | { | |
1734 | nop_offset = roff + 3; | |
1735 | irel->r_offset -= 1; | |
1736 | } | |
1737 | else | |
1738 | nop_offset = roff - 2; | |
1739 | } | |
c175a657 L |
1740 | } |
1741 | else | |
1742 | { | |
1743 | /* Convert to "jmp foo nop". */ | |
1744 | modrm = 0xe9; | |
1745 | nop = NOP_OPCODE; | |
1746 | nop_offset = roff + 3; | |
1747 | irel->r_offset -= 1; | |
1748 | } | |
1749 | ||
1750 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1751 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1752 | /* When converting to PC-relative relocation, we | |
1753 | need to adjust addend by -4. */ | |
1754 | bfd_put_32 (abfd, -4, contents + irel->r_offset); | |
1755 | irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32); | |
1756 | ||
1757 | *converted = TRUE; | |
1758 | } | |
1759 | } | |
1760 | else | |
1761 | { | |
1762 | /* We have "mov foo@GOT[(%re1g)], %reg2", | |
1763 | "test %reg1, foo@GOT(%reg2)" and | |
1764 | "binop foo@GOT[(%reg1)], %reg2". | |
1765 | ||
1766 | Avoid optimizing _DYNAMIC since ld.so may use its | |
1767 | link-time address. */ | |
1768 | if (h == htab->elf.hdynamic) | |
1769 | return TRUE; | |
1770 | ||
1771 | /* def_regular is set by an assignment in a linker script in | |
1772 | bfd_elf_record_link_assignment. */ | |
1773 | if ((h->def_regular | |
1774 | || h->root.type == bfd_link_hash_defined | |
1775 | || h->root.type == bfd_link_hash_defweak) | |
1776 | && SYMBOL_REFERENCES_LOCAL (link_info, h)) | |
1777 | { | |
1778 | convert_load: | |
1779 | if (opcode == 0x8b) | |
1780 | { | |
1781 | if (to_reloc_32) | |
1782 | { | |
1783 | /* Convert "mov foo@GOT[(%reg1)], %reg2" to | |
1784 | "mov $foo, %reg2" with R_386_32. */ | |
1785 | r_type = R_386_32; | |
1786 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1787 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1788 | opcode = 0xc7; | |
1789 | } | |
1790 | else | |
1791 | { | |
1792 | /* Convert "mov foo@GOT(%reg1), %reg2" to | |
1793 | "lea foo@GOTOFF(%reg1), %reg2". */ | |
1794 | r_type = R_386_GOTOFF; | |
1795 | opcode = 0x8d; | |
1796 | } | |
1797 | } | |
1798 | else | |
1799 | { | |
1800 | /* Only R_386_32 is supported. */ | |
1801 | if (!to_reloc_32) | |
1802 | return TRUE; | |
1803 | ||
1804 | if (opcode == 0x85) | |
1805 | { | |
1806 | /* Convert "test %reg1, foo@GOT(%reg2)" to | |
1807 | "test $foo, %reg1". */ | |
1808 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1809 | opcode = 0xf7; | |
1810 | } | |
1811 | else | |
1812 | { | |
1813 | /* Convert "binop foo@GOT(%reg1), %reg2" to | |
1814 | "binop $foo, %reg2". */ | |
1815 | modrm = (0xc0 | |
1816 | | (modrm & 0x38) >> 3 | |
1817 | | (opcode & 0x3c)); | |
1818 | opcode = 0x81; | |
1819 | } | |
1820 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1821 | r_type = R_386_32; | |
1822 | } | |
1823 | ||
1824 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1825 | irel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
1826 | ||
1827 | *converted = TRUE; | |
1828 | } | |
1829 | } | |
1830 | ||
1831 | return TRUE; | |
1832 | } | |
1833 | ||
c1d11331 L |
1834 | /* Rename some of the generic section flags to better document how they |
1835 | are used here. */ | |
c337a162 L |
1836 | #define need_convert_load sec_flg0 |
1837 | #define check_relocs_failed sec_flg1 | |
c1d11331 | 1838 | |
252b5132 | 1839 | /* Look through the relocs for a section during the first phase, and |
0ac8d2ca AM |
1840 | calculate needed space in the global offset table, procedure linkage |
1841 | table, and dynamic reloc sections. */ | |
252b5132 | 1842 | |
b34976b6 | 1843 | static bfd_boolean |
55fd94b0 AM |
1844 | elf_i386_check_relocs (bfd *abfd, |
1845 | struct bfd_link_info *info, | |
1846 | asection *sec, | |
1847 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1848 | { |
6725bdbf | 1849 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
1850 | Elf_Internal_Shdr *symtab_hdr; |
1851 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
1852 | const Elf_Internal_Rela *rel; |
1853 | const Elf_Internal_Rela *rel_end; | |
252b5132 | 1854 | asection *sreloc; |
bedfd056 | 1855 | bfd_byte *contents; |
dd7e64d4 | 1856 | bfd_boolean use_plt_got; |
252b5132 | 1857 | |
0e1862bb | 1858 | if (bfd_link_relocatable (info)) |
b34976b6 | 1859 | return TRUE; |
252b5132 | 1860 | |
081b1afe L |
1861 | /* Don't do anything special with non-loaded, non-alloced sections. |
1862 | In particular, any relocs in such sections should not affect GOT | |
1863 | and PLT reference counting (ie. we don't allow them to create GOT | |
1864 | or PLT entries), there's no possibility or desire to optimize TLS | |
1865 | relocs, and there's not much point in propagating relocs to shared | |
1866 | libs that the dynamic linker won't relocate. */ | |
1867 | if ((sec->flags & SEC_ALLOC) == 0) | |
1868 | return TRUE; | |
1869 | ||
0ffa91dd NC |
1870 | BFD_ASSERT (is_i386_elf (abfd)); |
1871 | ||
6725bdbf | 1872 | htab = elf_i386_hash_table (info); |
4dfe6ac6 | 1873 | if (htab == NULL) |
c337a162 L |
1874 | { |
1875 | sec->check_relocs_failed = 1; | |
1876 | return FALSE; | |
1877 | } | |
4dfe6ac6 | 1878 | |
bedfd056 L |
1879 | /* Get the section contents. */ |
1880 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1881 | contents = elf_section_data (sec)->this_hdr.contents; | |
1882 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1883 | { | |
1884 | sec->check_relocs_failed = 1; | |
1885 | return FALSE; | |
1886 | } | |
1887 | ||
dd7e64d4 L |
1888 | use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks |
1889 | && (get_elf_i386_backend_data (abfd) | |
1890 | == &elf_i386_arch_bed)); | |
1891 | ||
0ffa91dd | 1892 | symtab_hdr = &elf_symtab_hdr (abfd); |
252b5132 | 1893 | sym_hashes = elf_sym_hashes (abfd); |
252b5132 | 1894 | |
252b5132 RH |
1895 | sreloc = NULL; |
1896 | ||
1897 | rel_end = relocs + sec->reloc_count; | |
1898 | for (rel = relocs; rel < rel_end; rel++) | |
1899 | { | |
13ae64f3 | 1900 | unsigned int r_type; |
252b5132 RH |
1901 | unsigned long r_symndx; |
1902 | struct elf_link_hash_entry *h; | |
d5597ebc | 1903 | struct elf_i386_link_hash_entry *eh; |
4c544807 L |
1904 | Elf_Internal_Sym *isym; |
1905 | const char *name; | |
06a6a421 | 1906 | bfd_boolean size_reloc; |
252b5132 RH |
1907 | |
1908 | r_symndx = ELF32_R_SYM (rel->r_info); | |
13ae64f3 | 1909 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 1910 | |
d9bc7a44 | 1911 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
f5f31454 | 1912 | { |
695344c0 | 1913 | /* xgettext:c-format */ |
4eca0228 AM |
1914 | _bfd_error_handler (_("%B: bad symbol index: %d"), |
1915 | abfd, r_symndx); | |
c337a162 | 1916 | goto error_return; |
f5f31454 L |
1917 | } |
1918 | ||
252b5132 | 1919 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1920 | { |
1921 | /* A local symbol. */ | |
c2e61a4e L |
1922 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1923 | abfd, r_symndx); | |
1924 | if (isym == NULL) | |
c337a162 | 1925 | goto error_return; |
c25bc9fc L |
1926 | |
1927 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
c25bc9fc L |
1928 | if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
1929 | { | |
9fff0c39 | 1930 | h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE); |
c25bc9fc | 1931 | if (h == NULL) |
c337a162 | 1932 | goto error_return; |
6bbec505 | 1933 | |
c25bc9fc L |
1934 | /* Fake a STT_GNU_IFUNC symbol. */ |
1935 | h->type = STT_GNU_IFUNC; | |
1936 | h->def_regular = 1; | |
1937 | h->ref_regular = 1; | |
1938 | h->forced_local = 1; | |
1939 | h->root.type = bfd_link_hash_defined; | |
1940 | } | |
1941 | else | |
1942 | h = NULL; | |
1943 | } | |
252b5132 | 1944 | else |
71cb9464 | 1945 | { |
4c544807 | 1946 | isym = NULL; |
71cb9464 L |
1947 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1948 | while (h->root.type == bfd_link_hash_indirect | |
1949 | || h->root.type == bfd_link_hash_warning) | |
1950 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1951 | } |
cbe950e9 | 1952 | |
d5597ebc | 1953 | eh = (struct elf_i386_link_hash_entry *) h; |
c25bc9fc L |
1954 | if (h != NULL) |
1955 | { | |
cbe950e9 L |
1956 | switch (r_type) |
1957 | { | |
1958 | default: | |
1959 | break; | |
1960 | ||
d5597ebc L |
1961 | case R_386_GOTOFF: |
1962 | eh->gotoff_ref = 1; | |
1a0670f3 | 1963 | /* Fall through. */ |
cbe950e9 L |
1964 | case R_386_32: |
1965 | case R_386_PC32: | |
1966 | case R_386_PLT32: | |
1967 | case R_386_GOT32: | |
02a86693 | 1968 | case R_386_GOT32X: |
9d4057ee AM |
1969 | if (htab->elf.dynobj == NULL) |
1970 | htab->elf.dynobj = abfd; | |
466ee2af L |
1971 | /* Create the ifunc sections for static executables. */ |
1972 | if (h->type == STT_GNU_IFUNC | |
1973 | && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj, | |
1974 | info)) | |
c337a162 | 1975 | goto error_return; |
cbe950e9 L |
1976 | break; |
1977 | } | |
1978 | ||
ad1e85de L |
1979 | /* It is referenced by a non-shared object. */ |
1980 | h->ref_regular = 1; | |
61315175 | 1981 | h->root.non_ir_ref = 1; |
13a2df29 L |
1982 | |
1983 | if (h->type == STT_GNU_IFUNC) | |
1984 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
1985 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 1986 | } |
252b5132 | 1987 | |
bedfd056 | 1988 | if (! elf_i386_tls_transition (info, abfd, sec, contents, |
142411ca L |
1989 | symtab_hdr, sym_hashes, |
1990 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 1991 | rel, rel_end, h, r_symndx, FALSE)) |
c337a162 | 1992 | goto error_return; |
13ae64f3 JJ |
1993 | |
1994 | switch (r_type) | |
252b5132 | 1995 | { |
37e55690 JJ |
1996 | case R_386_TLS_LDM: |
1997 | htab->tls_ldm_got.refcount += 1; | |
1998 | goto create_got; | |
1999 | ||
2000 | case R_386_PLT32: | |
2001 | /* This symbol requires a procedure linkage table entry. We | |
2002 | actually build the entry in adjust_dynamic_symbol, | |
2003 | because this might be a case of linking PIC code which is | |
2004 | never referenced by a dynamic object, in which case we | |
2005 | don't need to generate a procedure linkage table entry | |
2006 | after all. */ | |
2007 | ||
2008 | /* If this is a local symbol, we resolve it directly without | |
2009 | creating a procedure linkage table entry. */ | |
2010 | if (h == NULL) | |
2011 | continue; | |
2012 | ||
aec6b87e | 2013 | eh->has_got_reloc = 1; |
f5385ebf | 2014 | h->needs_plt = 1; |
37e55690 JJ |
2015 | h->plt.refcount += 1; |
2016 | break; | |
2017 | ||
6a3e1bae | 2018 | case R_386_SIZE32: |
06a6a421 | 2019 | size_reloc = TRUE; |
6a3e1bae L |
2020 | goto do_size; |
2021 | ||
13ae64f3 | 2022 | case R_386_TLS_IE_32: |
37e55690 JJ |
2023 | case R_386_TLS_IE: |
2024 | case R_386_TLS_GOTIE: | |
0e1862bb | 2025 | if (!bfd_link_executable (info)) |
13ae64f3 | 2026 | info->flags |= DF_STATIC_TLS; |
37e55690 JJ |
2027 | /* Fall through */ |
2028 | ||
252b5132 | 2029 | case R_386_GOT32: |
02a86693 | 2030 | case R_386_GOT32X: |
13ae64f3 | 2031 | case R_386_TLS_GD: |
67a4f2b7 AO |
2032 | case R_386_TLS_GOTDESC: |
2033 | case R_386_TLS_DESC_CALL: | |
252b5132 | 2034 | /* This symbol requires a global offset table entry. */ |
13ae64f3 JJ |
2035 | { |
2036 | int tls_type, old_tls_type; | |
2037 | ||
2038 | switch (r_type) | |
2039 | { | |
2040 | default: | |
02a86693 L |
2041 | case R_386_GOT32: |
2042 | case R_386_GOT32X: | |
2043 | tls_type = GOT_NORMAL; | |
2044 | break; | |
13ae64f3 | 2045 | case R_386_TLS_GD: tls_type = GOT_TLS_GD; break; |
67a4f2b7 AO |
2046 | case R_386_TLS_GOTDESC: |
2047 | case R_386_TLS_DESC_CALL: | |
2048 | tls_type = GOT_TLS_GDESC; break; | |
37e55690 JJ |
2049 | case R_386_TLS_IE_32: |
2050 | if (ELF32_R_TYPE (rel->r_info) == r_type) | |
2051 | tls_type = GOT_TLS_IE_NEG; | |
2052 | else | |
ebcfb3c0 JJ |
2053 | /* If this is a GD->IE transition, we may use either of |
2054 | R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */ | |
37e55690 JJ |
2055 | tls_type = GOT_TLS_IE; |
2056 | break; | |
2057 | case R_386_TLS_IE: | |
2058 | case R_386_TLS_GOTIE: | |
2059 | tls_type = GOT_TLS_IE_POS; break; | |
13ae64f3 JJ |
2060 | } |
2061 | ||
2062 | if (h != NULL) | |
2063 | { | |
2064 | h->got.refcount += 1; | |
2065 | old_tls_type = elf_i386_hash_entry(h)->tls_type; | |
2066 | } | |
2067 | else | |
2068 | { | |
2069 | bfd_signed_vma *local_got_refcounts; | |
2070 | ||
2071 | /* This is a global offset table entry for a local symbol. */ | |
2072 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2073 | if (local_got_refcounts == NULL) | |
2074 | { | |
2075 | bfd_size_type size; | |
2076 | ||
2077 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
2078 | size *= (sizeof (bfd_signed_vma) |
2079 | + sizeof (bfd_vma) + sizeof(char)); | |
a50b1753 NC |
2080 | local_got_refcounts = (bfd_signed_vma *) |
2081 | bfd_zalloc (abfd, size); | |
13ae64f3 | 2082 | if (local_got_refcounts == NULL) |
c337a162 | 2083 | goto error_return; |
13ae64f3 | 2084 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
67a4f2b7 AO |
2085 | elf_i386_local_tlsdesc_gotent (abfd) |
2086 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); | |
13ae64f3 | 2087 | elf_i386_local_got_tls_type (abfd) |
67a4f2b7 | 2088 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
13ae64f3 JJ |
2089 | } |
2090 | local_got_refcounts[r_symndx] += 1; | |
2091 | old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx]; | |
2092 | } | |
2093 | ||
37e55690 JJ |
2094 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) |
2095 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
2096 | /* If a TLS symbol is accessed using IE at least once, |
2097 | there is no point to use dynamic model for it. */ | |
ebcfb3c0 | 2098 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN |
67a4f2b7 | 2099 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
37e55690 | 2100 | || (tls_type & GOT_TLS_IE) == 0)) |
13ae64f3 | 2101 | { |
67a4f2b7 | 2102 | if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type)) |
37e55690 | 2103 | tls_type = old_tls_type; |
67a4f2b7 AO |
2104 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2105 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2106 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
2107 | else |
2108 | { | |
09a24cbf | 2109 | if (h) |
4c544807 L |
2110 | name = h->root.root.string; |
2111 | else | |
2112 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
2113 | NULL); | |
4eca0228 | 2114 | _bfd_error_handler |
695344c0 | 2115 | /* xgettext:c-format */ |
d003868e | 2116 | (_("%B: `%s' accessed both as normal and " |
55fd94b0 | 2117 | "thread local symbol"), |
4c544807 | 2118 | abfd, name); |
68c4a57e | 2119 | bfd_set_error (bfd_error_bad_value); |
c337a162 | 2120 | goto error_return; |
13ae64f3 JJ |
2121 | } |
2122 | } | |
2123 | ||
2124 | if (old_tls_type != tls_type) | |
2125 | { | |
2126 | if (h != NULL) | |
2127 | elf_i386_hash_entry (h)->tls_type = tls_type; | |
2128 | else | |
2129 | elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
2130 | } | |
2131 | } | |
0ac8d2ca AM |
2132 | /* Fall through */ |
2133 | ||
2134 | case R_386_GOTOFF: | |
2135 | case R_386_GOTPC: | |
13ae64f3 | 2136 | create_got: |
6de2ae4a | 2137 | if (htab->elf.sgot == NULL) |
0ac8d2ca AM |
2138 | { |
2139 | if (htab->elf.dynobj == NULL) | |
2140 | htab->elf.dynobj = abfd; | |
6de2ae4a | 2141 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) |
c337a162 | 2142 | goto error_return; |
0ac8d2ca | 2143 | } |
37e55690 | 2144 | if (r_type != R_386_TLS_IE) |
aec6b87e L |
2145 | { |
2146 | if (eh != NULL) | |
2147 | eh->has_got_reloc = 1; | |
2148 | break; | |
2149 | } | |
37e55690 | 2150 | /* Fall through */ |
252b5132 | 2151 | |
37e55690 JJ |
2152 | case R_386_TLS_LE_32: |
2153 | case R_386_TLS_LE: | |
aec6b87e L |
2154 | if (eh != NULL) |
2155 | eh->has_got_reloc = 1; | |
0e1862bb | 2156 | if (bfd_link_executable (info)) |
37e55690 | 2157 | break; |
bffbf940 | 2158 | info->flags |= DF_STATIC_TLS; |
aec6b87e | 2159 | goto do_relocation; |
252b5132 RH |
2160 | |
2161 | case R_386_32: | |
2162 | case R_386_PC32: | |
aec6b87e L |
2163 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
2164 | eh->has_non_got_reloc = 1; | |
2165 | do_relocation: | |
bf52d7c7 L |
2166 | /* We are called after all symbols have been resolved. Only |
2167 | relocation against STT_GNU_IFUNC symbol must go through | |
2168 | PLT. */ | |
d1ed1c7d L |
2169 | if (h != NULL |
2170 | && (bfd_link_executable (info) | |
bf52d7c7 | 2171 | || h->type == STT_GNU_IFUNC)) |
6725bdbf | 2172 | { |
12d0ee4a | 2173 | /* If this reloc is in a read-only section, we might |
ebe50bae AM |
2174 | need a copy reloc. We can't check reliably at this |
2175 | stage whether the section is read-only, as input | |
2176 | sections have not yet been mapped to output sections. | |
2177 | Tentatively set the flag for now, and correct in | |
2178 | adjust_dynamic_symbol. */ | |
f5385ebf | 2179 | h->non_got_ref = 1; |
12d0ee4a | 2180 | |
233cc9c1 L |
2181 | /* We may need a .plt entry if the symbol is a function |
2182 | defined in a shared lib or is a STT_GNU_IFUNC function | |
2183 | referenced from the code or read-only section. */ | |
2184 | if (!h->def_regular | |
2185 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
2186 | h->plt.refcount += 1; | |
2187 | ||
4b627c18 L |
2188 | if (r_type == R_386_PC32) |
2189 | { | |
2190 | /* Since something like ".long foo - ." may be used | |
2191 | as pointer, make sure that PLT is used if foo is | |
2192 | a function defined in a shared library. */ | |
2193 | if ((sec->flags & SEC_CODE) == 0) | |
2194 | h->pointer_equality_needed = 1; | |
74437ea2 L |
2195 | else if (h->type == STT_GNU_IFUNC |
2196 | && bfd_link_pic (info)) | |
2197 | { | |
2198 | if (isym == NULL) | |
2199 | name = h->root.root.string; | |
2200 | else | |
2201 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
2202 | NULL); | |
4eca0228 | 2203 | _bfd_error_handler |
695344c0 | 2204 | /* xgettext:c-format */ |
74437ea2 L |
2205 | (_("%B: unsupported non-PIC call to IFUNC `%s'"), |
2206 | abfd, name); | |
2207 | bfd_set_error (bfd_error_bad_value); | |
2208 | goto error_return; | |
2209 | } | |
4b627c18 L |
2210 | } |
2211 | else | |
04ebc307 L |
2212 | { |
2213 | h->pointer_equality_needed = 1; | |
2214 | /* R_386_32 can be resolved at run-time. */ | |
2215 | if (r_type == R_386_32 | |
2216 | && (sec->flags & SEC_READONLY) == 0) | |
2217 | eh->func_pointer_refcount += 1; | |
2218 | } | |
6725bdbf | 2219 | } |
7843f00e | 2220 | |
06a6a421 | 2221 | size_reloc = FALSE; |
6a3e1bae | 2222 | do_size: |
252b5132 | 2223 | /* If we are creating a shared library, and this is a reloc |
f69da49f AM |
2224 | against a global symbol, or a non PC relative reloc |
2225 | against a local symbol, then we need to copy the reloc | |
2226 | into the shared library. However, if we are linking with | |
2227 | -Bsymbolic, we do not need to copy a reloc against a | |
2228 | global symbol which is defined in an object we are | |
2229 | including in the link (i.e., DEF_REGULAR is set). At | |
2230 | this point we have not seen all the input files, so it is | |
2231 | possible that DEF_REGULAR is not set now but will be set | |
1f655a09 L |
2232 | later (it is never cleared). In case of a weak definition, |
2233 | DEF_REGULAR may be cleared later by a strong definition in | |
ebe50bae | 2234 | a shared library. We account for that possibility below by |
1f655a09 L |
2235 | storing information in the relocs_copied field of the hash |
2236 | table entry. A similar situation occurs when creating | |
2237 | shared libraries and symbol visibility changes render the | |
12d0ee4a | 2238 | symbol local. |
56882138 | 2239 | |
12d0ee4a AM |
2240 | If on the other hand, we are creating an executable, we |
2241 | may need to keep relocations for symbols satisfied by a | |
2242 | dynamic library if we manage to avoid copy relocs for the | |
233cc9c1 L |
2243 | symbol. |
2244 | ||
2245 | Generate dynamic pointer relocation against STT_GNU_IFUNC | |
2246 | symbol in the non-code section. */ | |
081b1afe L |
2247 | if ((bfd_link_pic (info) |
2248 | && (r_type != R_386_PC32 | |
2249 | || (h != NULL | |
2250 | && (! (bfd_link_pie (info) | |
2251 | || SYMBOLIC_BIND (info, h)) | |
2252 | || h->root.type == bfd_link_hash_defweak | |
2253 | || !h->def_regular)))) | |
233cc9c1 L |
2254 | || (h != NULL |
2255 | && h->type == STT_GNU_IFUNC | |
2256 | && r_type == R_386_32 | |
2257 | && (sec->flags & SEC_CODE) == 0) | |
081b1afe L |
2258 | || (ELIMINATE_COPY_RELOCS |
2259 | && !bfd_link_pic (info) | |
2260 | && h != NULL | |
2261 | && (h->root.type == bfd_link_hash_defweak | |
2262 | || !h->def_regular))) | |
252b5132 | 2263 | { |
e03a8ed8 L |
2264 | struct elf_dyn_relocs *p; |
2265 | struct elf_dyn_relocs **head; | |
ec338859 | 2266 | |
12d0ee4a AM |
2267 | /* We must copy these reloc types into the output file. |
2268 | Create a reloc section in dynobj and make room for | |
2269 | this reloc. */ | |
252b5132 RH |
2270 | if (sreloc == NULL) |
2271 | { | |
0ac8d2ca AM |
2272 | if (htab->elf.dynobj == NULL) |
2273 | htab->elf.dynobj = abfd; | |
2274 | ||
83bac4b0 NC |
2275 | sreloc = _bfd_elf_make_dynamic_reloc_section |
2276 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE); | |
2277 | ||
252b5132 | 2278 | if (sreloc == NULL) |
c337a162 | 2279 | goto error_return; |
252b5132 RH |
2280 | } |
2281 | ||
0c715baa AM |
2282 | /* If this is a global symbol, we count the number of |
2283 | relocations we need for this symbol. */ | |
2284 | if (h != NULL) | |
252b5132 | 2285 | { |
d5597ebc | 2286 | head = &eh->dyn_relocs; |
0c715baa AM |
2287 | } |
2288 | else | |
2289 | { | |
ec338859 AM |
2290 | /* Track dynamic relocs needed for local syms too. |
2291 | We really need local syms available to do this | |
2292 | easily. Oh well. */ | |
87d72d41 | 2293 | void **vpp; |
ec338859 | 2294 | asection *s; |
87d72d41 AM |
2295 | |
2296 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2297 | abfd, r_symndx); | |
2298 | if (isym == NULL) | |
c337a162 | 2299 | goto error_return; |
87d72d41 AM |
2300 | |
2301 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
ec338859 | 2302 | if (s == NULL) |
87d72d41 | 2303 | s = sec; |
ec338859 | 2304 | |
e81d3500 | 2305 | vpp = &elf_section_data (s)->local_dynrel; |
e03a8ed8 | 2306 | head = (struct elf_dyn_relocs **)vpp; |
ec338859 AM |
2307 | } |
2308 | ||
2309 | p = *head; | |
2310 | if (p == NULL || p->sec != sec) | |
2311 | { | |
2312 | bfd_size_type amt = sizeof *p; | |
a50b1753 NC |
2313 | p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj, |
2314 | amt); | |
ec338859 | 2315 | if (p == NULL) |
c337a162 | 2316 | goto error_return; |
ec338859 AM |
2317 | p->next = *head; |
2318 | *head = p; | |
2319 | p->sec = sec; | |
2320 | p->count = 0; | |
2321 | p->pc_count = 0; | |
252b5132 | 2322 | } |
ec338859 AM |
2323 | |
2324 | p->count += 1; | |
06a6a421 L |
2325 | /* Count size relocation as PC-relative relocation. */ |
2326 | if (r_type == R_386_PC32 || size_reloc) | |
ec338859 | 2327 | p->pc_count += 1; |
252b5132 | 2328 | } |
252b5132 RH |
2329 | break; |
2330 | ||
2331 | /* This relocation describes the C++ object vtable hierarchy. | |
2332 | Reconstruct it for later use during GC. */ | |
2333 | case R_386_GNU_VTINHERIT: | |
d17e0c6e | 2334 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c337a162 | 2335 | goto error_return; |
252b5132 RH |
2336 | break; |
2337 | ||
2338 | /* This relocation describes which C++ vtable entries are actually | |
2339 | used. Record for later use during GC. */ | |
2340 | case R_386_GNU_VTENTRY: | |
c6aa130f MS |
2341 | BFD_ASSERT (h != NULL); |
2342 | if (h != NULL | |
2343 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) | |
c337a162 | 2344 | goto error_return; |
252b5132 RH |
2345 | break; |
2346 | ||
2347 | default: | |
2348 | break; | |
2349 | } | |
dd7e64d4 L |
2350 | |
2351 | if (use_plt_got | |
2352 | && h != NULL | |
2353 | && h->plt.refcount > 0 | |
8ded2ddc L |
2354 | && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
2355 | || h->got.refcount > 0) | |
dd7e64d4 L |
2356 | && htab->plt_got == NULL) |
2357 | { | |
2358 | /* Create the GOT procedure linkage table. */ | |
2359 | unsigned int plt_got_align; | |
2360 | const struct elf_backend_data *bed; | |
2361 | ||
2362 | bed = get_elf_backend_data (info->output_bfd); | |
2363 | BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8 | |
2364 | && (sizeof (elf_i386_got_plt_entry) | |
2365 | == sizeof (elf_i386_pic_got_plt_entry))); | |
2366 | plt_got_align = 3; | |
2367 | ||
2368 | if (htab->elf.dynobj == NULL) | |
2369 | htab->elf.dynobj = abfd; | |
2370 | htab->plt_got | |
2371 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
2372 | ".plt.got", | |
2373 | (bed->dynamic_sec_flags | |
2374 | | SEC_ALLOC | |
2375 | | SEC_CODE | |
2376 | | SEC_LOAD | |
2377 | | SEC_READONLY)); | |
2378 | if (htab->plt_got == NULL | |
2379 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
2380 | htab->plt_got, | |
2381 | plt_got_align)) | |
c337a162 | 2382 | goto error_return; |
fff53dae L |
2383 | |
2384 | if (!info->no_ld_generated_unwind_info | |
2385 | && htab->plt_got_eh_frame == NULL | |
2386 | && get_elf_i386_backend_data (abfd)->plt->eh_frame_plt_got != NULL) | |
2387 | { | |
2388 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | |
2389 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
2390 | | SEC_LINKER_CREATED); | |
2391 | htab->plt_got_eh_frame | |
2392 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
2393 | ".eh_frame", | |
2394 | flags); | |
2395 | if (htab->plt_got_eh_frame == NULL | |
2396 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
2397 | htab->plt_got_eh_frame, | |
52b232b3 | 2398 | 2)) |
fff53dae L |
2399 | goto error_return; |
2400 | } | |
dd7e64d4 | 2401 | } |
c1d11331 | 2402 | |
52bf37dd | 2403 | if (r_type == R_386_GOT32X |
c1d11331 | 2404 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
02a86693 | 2405 | sec->need_convert_load = 1; |
252b5132 RH |
2406 | } |
2407 | ||
bedfd056 L |
2408 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2409 | { | |
2410 | if (!info->keep_memory) | |
2411 | free (contents); | |
2412 | else | |
2413 | { | |
2414 | /* Cache the section contents for elf_link_input_bfd. */ | |
2415 | elf_section_data (sec)->this_hdr.contents = contents; | |
2416 | } | |
2417 | } | |
2418 | ||
b34976b6 | 2419 | return TRUE; |
c337a162 L |
2420 | |
2421 | error_return: | |
bedfd056 L |
2422 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2423 | free (contents); | |
c337a162 L |
2424 | sec->check_relocs_failed = 1; |
2425 | return FALSE; | |
252b5132 RH |
2426 | } |
2427 | ||
2428 | /* Return the section that should be marked against GC for a given | |
2429 | relocation. */ | |
2430 | ||
2431 | static asection * | |
55fd94b0 | 2432 | elf_i386_gc_mark_hook (asection *sec, |
07adf181 | 2433 | struct bfd_link_info *info, |
55fd94b0 AM |
2434 | Elf_Internal_Rela *rel, |
2435 | struct elf_link_hash_entry *h, | |
2436 | Elf_Internal_Sym *sym) | |
252b5132 RH |
2437 | { |
2438 | if (h != NULL) | |
07adf181 AM |
2439 | switch (ELF32_R_TYPE (rel->r_info)) |
2440 | { | |
2441 | case R_386_GNU_VTINHERIT: | |
2442 | case R_386_GNU_VTENTRY: | |
2443 | return NULL; | |
2444 | } | |
2445 | ||
2446 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
252b5132 RH |
2447 | } |
2448 | ||
aec6b87e L |
2449 | /* Remove undefined weak symbol from the dynamic symbol table if it |
2450 | is resolved to 0. */ | |
2451 | ||
2452 | static bfd_boolean | |
2453 | elf_i386_fixup_symbol (struct bfd_link_info *info, | |
2454 | struct elf_link_hash_entry *h) | |
2455 | { | |
2456 | if (h->dynindx != -1 | |
2457 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, | |
e62b9723 | 2458 | elf_i386_hash_entry (h)->has_got_reloc, |
aec6b87e L |
2459 | elf_i386_hash_entry (h))) |
2460 | { | |
2461 | h->dynindx = -1; | |
2462 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
2463 | h->dynstr_index); | |
2464 | } | |
2465 | return TRUE; | |
2466 | } | |
2467 | ||
252b5132 RH |
2468 | /* Adjust a symbol defined by a dynamic object and referenced by a |
2469 | regular object. The current definition is in some section of the | |
2470 | dynamic object, but we're not including those sections. We have to | |
2471 | change the definition to something the rest of the link can | |
2472 | understand. */ | |
2473 | ||
b34976b6 | 2474 | static bfd_boolean |
55fd94b0 AM |
2475 | elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info, |
2476 | struct elf_link_hash_entry *h) | |
252b5132 | 2477 | { |
6725bdbf | 2478 | struct elf_i386_link_hash_table *htab; |
5474d94f | 2479 | asection *s, *srel; |
5ca5bb35 L |
2480 | struct elf_i386_link_hash_entry *eh; |
2481 | struct elf_dyn_relocs *p; | |
252b5132 | 2482 | |
cbe950e9 L |
2483 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2484 | if (h->type == STT_GNU_IFUNC) | |
2485 | { | |
73bcf233 L |
2486 | /* All local STT_GNU_IFUNC references must be treate as local |
2487 | calls via local PLT. */ | |
5ca5bb35 L |
2488 | if (h->ref_regular |
2489 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2490 | { | |
73bcf233 | 2491 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2492 | struct elf_dyn_relocs **pp; |
2493 | ||
2494 | eh = (struct elf_i386_link_hash_entry *) h; | |
2495 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2496 | { | |
2497 | pc_count += p->pc_count; | |
2498 | p->count -= p->pc_count; | |
2499 | p->pc_count = 0; | |
73bcf233 | 2500 | count += p->count; |
5ca5bb35 L |
2501 | if (p->count == 0) |
2502 | *pp = p->next; | |
2503 | else | |
2504 | pp = &p->next; | |
2505 | } | |
2506 | ||
73bcf233 | 2507 | if (pc_count || count) |
5ca5bb35 | 2508 | { |
5ca5bb35 | 2509 | h->non_got_ref = 1; |
233cc9c1 L |
2510 | if (pc_count) |
2511 | { | |
2512 | /* Increment PLT reference count only for PC-relative | |
2513 | references. */ | |
2514 | h->needs_plt = 1; | |
2515 | if (h->plt.refcount <= 0) | |
2516 | h->plt.refcount = 1; | |
2517 | else | |
2518 | h->plt.refcount += 1; | |
2519 | } | |
5ca5bb35 L |
2520 | } |
2521 | } | |
2522 | ||
cbe950e9 L |
2523 | if (h->plt.refcount <= 0) |
2524 | { | |
2525 | h->plt.offset = (bfd_vma) -1; | |
2526 | h->needs_plt = 0; | |
2527 | } | |
2528 | return TRUE; | |
2529 | } | |
2530 | ||
252b5132 RH |
2531 | /* If this is a function, put it in the procedure linkage table. We |
2532 | will fill in the contents of the procedure linkage table later, | |
2533 | when we know the address of the .got section. */ | |
2534 | if (h->type == STT_FUNC | |
f5385ebf | 2535 | || h->needs_plt) |
252b5132 | 2536 | { |
6725bdbf | 2537 | if (h->plt.refcount <= 0 |
9c7a29a3 AM |
2538 | || SYMBOL_CALLS_LOCAL (info, h) |
2539 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2540 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
2541 | { |
2542 | /* This case can occur if we saw a PLT32 reloc in an input | |
dd5724d5 AM |
2543 | file, but the symbol was never referred to by a dynamic |
2544 | object, or if all references were garbage collected. In | |
2545 | such a case, we don't actually need to build a procedure | |
2546 | linkage table, and we can just do a PC32 reloc instead. */ | |
bbd7ec4a | 2547 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2548 | h->needs_plt = 0; |
252b5132 RH |
2549 | } |
2550 | ||
b34976b6 | 2551 | return TRUE; |
252b5132 | 2552 | } |
6725bdbf AM |
2553 | else |
2554 | /* It's possible that we incorrectly decided a .plt reloc was | |
2555 | needed for an R_386_PC32 reloc to a non-function sym in | |
2556 | check_relocs. We can't decide accurately between function and | |
2557 | non-function syms in check-relocs; Objects loaded later in | |
2558 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2559 | h->plt.offset = (bfd_vma) -1; |
252b5132 RH |
2560 | |
2561 | /* If this is a weak symbol, and there is a real definition, the | |
2562 | processor independent code will have arranged for us to see the | |
2563 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 2564 | if (h->u.weakdef != NULL) |
252b5132 | 2565 | { |
f6e332e6 AM |
2566 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2567 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2568 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2569 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
a23b6845 | 2570 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 2571 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 2572 | return TRUE; |
252b5132 RH |
2573 | } |
2574 | ||
2575 | /* This is a reference to a symbol defined by a dynamic object which | |
2576 | is not a function. */ | |
2577 | ||
2578 | /* If we are creating a shared library, we must presume that the | |
2579 | only references to the symbol are via the global offset table. | |
2580 | For such cases we need not do anything here; the relocations will | |
2581 | be handled correctly by relocate_section. */ | |
0e1862bb | 2582 | if (!bfd_link_executable (info)) |
b34976b6 | 2583 | return TRUE; |
252b5132 | 2584 | |
7843f00e | 2585 | /* If there are no references to this symbol that do not use the |
d5597ebc L |
2586 | GOT nor R_386_GOTOFF relocation, we don't need to generate a copy |
2587 | reloc. */ | |
2588 | eh = (struct elf_i386_link_hash_entry *) h; | |
2589 | if (!h->non_got_ref && !eh->gotoff_ref) | |
b34976b6 | 2590 | return TRUE; |
7843f00e | 2591 | |
8bd621d8 AM |
2592 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2593 | if (info->nocopyreloc) | |
2594 | { | |
f5385ebf | 2595 | h->non_got_ref = 0; |
b34976b6 | 2596 | return TRUE; |
8bd621d8 AM |
2597 | } |
2598 | ||
643796e3 | 2599 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
2600 | if (htab == NULL) |
2601 | return FALSE; | |
643796e3 | 2602 | |
d5597ebc L |
2603 | /* If there aren't any dynamic relocs in read-only sections nor |
2604 | R_386_GOTOFF relocation, then we can keep the dynamic relocs and | |
2605 | avoid the copy reloc. This doesn't work on VxWorks, where we can | |
2606 | not have dynamic relocations (other than copy and jump slot | |
2607 | relocations) in an executable. */ | |
23209a78 | 2608 | if (ELIMINATE_COPY_RELOCS |
d5597ebc | 2609 | && !eh->gotoff_ref |
23209a78 | 2610 | && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks) |
ebe50bae | 2611 | { |
a23b6845 AM |
2612 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2613 | { | |
2614 | s = p->sec->output_section; | |
2615 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2616 | break; | |
2617 | } | |
2618 | ||
a23b6845 AM |
2619 | if (p == NULL) |
2620 | { | |
f5385ebf | 2621 | h->non_got_ref = 0; |
a23b6845 AM |
2622 | return TRUE; |
2623 | } | |
ebe50bae AM |
2624 | } |
2625 | ||
252b5132 RH |
2626 | /* We must allocate the symbol in our .dynbss section, which will |
2627 | become part of the .bss section of the executable. There will be | |
2628 | an entry for this symbol in the .dynsym section. The dynamic | |
2629 | object will contain position independent code, so all references | |
2630 | from the dynamic object to this symbol will go through the global | |
2631 | offset table. The dynamic linker will use the .dynsym entry to | |
2632 | determine the address it must put in the global offset table, so | |
2633 | both the dynamic object and the regular object will refer to the | |
2634 | same memory location for the variable. */ | |
2635 | ||
252b5132 RH |
2636 | /* We must generate a R_386_COPY reloc to tell the dynamic linker to |
2637 | copy the initial value out of the dynamic object and into the | |
0ac8d2ca | 2638 | runtime process image. */ |
5474d94f AM |
2639 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
2640 | { | |
2641 | s = htab->elf.sdynrelro; | |
2642 | srel = htab->elf.sreldynrelro; | |
2643 | } | |
2644 | else | |
2645 | { | |
2646 | s = htab->elf.sdynbss; | |
2647 | srel = htab->elf.srelbss; | |
2648 | } | |
1d7e9d18 | 2649 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
252b5132 | 2650 | { |
5474d94f | 2651 | srel->size += sizeof (Elf32_External_Rel); |
f5385ebf | 2652 | h->needs_copy = 1; |
252b5132 RH |
2653 | } |
2654 | ||
6cabe1ea | 2655 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
252b5132 RH |
2656 | } |
2657 | ||
6725bdbf | 2658 | /* Allocate space in .plt, .got and associated reloc sections for |
0c715baa | 2659 | dynamic relocs. */ |
6725bdbf | 2660 | |
b34976b6 | 2661 | static bfd_boolean |
eb4ff4d6 | 2662 | elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
6725bdbf AM |
2663 | { |
2664 | struct bfd_link_info *info; | |
2665 | struct elf_i386_link_hash_table *htab; | |
5a15f56f | 2666 | struct elf_i386_link_hash_entry *eh; |
e03a8ed8 | 2667 | struct elf_dyn_relocs *p; |
25e762b9 | 2668 | unsigned plt_entry_size; |
aec6b87e | 2669 | bfd_boolean resolved_to_zero; |
6725bdbf | 2670 | |
e92d460e | 2671 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2672 | return TRUE; |
6725bdbf | 2673 | |
cbe950e9 | 2674 | eh = (struct elf_i386_link_hash_entry *) h; |
e92d460e | 2675 | |
6725bdbf AM |
2676 | info = (struct bfd_link_info *) inf; |
2677 | htab = elf_i386_hash_table (info); | |
4dfe6ac6 NC |
2678 | if (htab == NULL) |
2679 | return FALSE; | |
6725bdbf | 2680 | |
25e762b9 RM |
2681 | plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
2682 | ||
e62b9723 L |
2683 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
2684 | eh->has_got_reloc, | |
2685 | eh); | |
aec6b87e | 2686 | |
04ebc307 L |
2687 | /* Clear the reference count of function pointer relocations if |
2688 | symbol isn't a normal function. */ | |
2689 | if (h->type != STT_FUNC) | |
2690 | eh->func_pointer_refcount = 0; | |
2691 | ||
dd7e64d4 L |
2692 | /* We can't use the GOT PLT if pointer equality is needed since |
2693 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
2694 | linker won't update the GOT slot. We will get into an infinite | |
2695 | loop at run-time. */ | |
2696 | if (htab->plt_got != NULL | |
2697 | && h->type != STT_GNU_IFUNC | |
2698 | && !h->pointer_equality_needed | |
2699 | && h->plt.refcount > 0 | |
2700 | && h->got.refcount > 0) | |
2701 | { | |
2702 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
2703 | reloctions. */ | |
2704 | h->plt.offset = (bfd_vma) -1; | |
2705 | ||
2706 | /* Use the GOT PLT. */ | |
2707 | eh->plt_got.refcount = 1; | |
2708 | } | |
2709 | ||
cbe950e9 L |
2710 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2711 | here if it is defined and referenced in a non-shared object. */ | |
2712 | if (h->type == STT_GNU_IFUNC | |
2713 | && h->def_regular) | |
25e762b9 | 2714 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs, |
2df3368d L |
2715 | &htab->readonly_dynrelocs_against_ifunc, |
2716 | plt_entry_size, | |
233cc9c1 | 2717 | plt_entry_size, 4, TRUE); |
04ebc307 L |
2718 | /* Don't create the PLT entry if there are only function pointer |
2719 | relocations which can be resolved at run-time. */ | |
cbe950e9 | 2720 | else if (htab->elf.dynamic_sections_created |
04ebc307 L |
2721 | && (h->plt.refcount > eh->func_pointer_refcount |
2722 | || eh->plt_got.refcount > 0)) | |
6725bdbf | 2723 | { |
25070364 L |
2724 | bfd_boolean use_plt_got; |
2725 | ||
04ebc307 L |
2726 | /* Clear the reference count of function pointer relocations |
2727 | if PLT is used. */ | |
2728 | eh->func_pointer_refcount = 0; | |
2729 | ||
8ded2ddc | 2730 | if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
25070364 L |
2731 | { |
2732 | /* Don't use the regular PLT for DF_BIND_NOW. */ | |
2733 | h->plt.offset = (bfd_vma) -1; | |
2734 | ||
2735 | /* Use the GOT PLT. */ | |
2736 | h->got.refcount = 1; | |
2737 | eh->plt_got.refcount = 1; | |
2738 | } | |
2739 | ||
2740 | use_plt_got = eh->plt_got.refcount > 0; | |
dd7e64d4 | 2741 | |
5a15f56f AM |
2742 | /* Make sure this symbol is output as a dynamic symbol. |
2743 | Undefined weak syms won't yet be marked as dynamic. */ | |
2744 | if (h->dynindx == -1 | |
aec6b87e L |
2745 | && !h->forced_local |
2746 | && !resolved_to_zero) | |
5a15f56f | 2747 | { |
c152c796 | 2748 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2749 | return FALSE; |
5a15f56f AM |
2750 | } |
2751 | ||
0e1862bb | 2752 | if (bfd_link_pic (info) |
4e795f50 | 2753 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
ced53ee5 | 2754 | { |
6de2ae4a | 2755 | asection *s = htab->elf.splt; |
dd7e64d4 | 2756 | asection *got_s = htab->plt_got; |
6725bdbf | 2757 | |
7c1e8d3e L |
2758 | /* If this is the first .plt entry, make room for the special |
2759 | first entry. The .plt section is used by prelink to undo | |
2760 | prelinking for dynamic relocations. */ | |
2761 | if (s->size == 0) | |
2762 | s->size = plt_entry_size; | |
2763 | ||
dd7e64d4 L |
2764 | if (use_plt_got) |
2765 | eh->plt_got.offset = got_s->size; | |
2766 | else | |
7c1e8d3e | 2767 | h->plt.offset = s->size; |
6725bdbf | 2768 | |
ced53ee5 AM |
2769 | /* If this symbol is not defined in a regular file, and we are |
2770 | not generating a shared library, then set the symbol to this | |
2771 | location in the .plt. This is required to make function | |
2772 | pointers compare as equal between the normal executable and | |
2773 | the shared library. */ | |
0e1862bb | 2774 | if (! bfd_link_pic (info) |
f5385ebf | 2775 | && !h->def_regular) |
ced53ee5 | 2776 | { |
dd7e64d4 L |
2777 | if (use_plt_got) |
2778 | { | |
2779 | /* We need to make a call to the entry of the GOT PLT | |
2780 | instead of regular PLT entry. */ | |
2781 | h->root.u.def.section = got_s; | |
2782 | h->root.u.def.value = eh->plt_got.offset; | |
2783 | } | |
2784 | else | |
2785 | { | |
2786 | h->root.u.def.section = s; | |
2787 | h->root.u.def.value = h->plt.offset; | |
2788 | } | |
ced53ee5 | 2789 | } |
6725bdbf | 2790 | |
ced53ee5 | 2791 | /* Make room for this entry. */ |
dd7e64d4 L |
2792 | if (use_plt_got) |
2793 | got_s->size += sizeof (elf_i386_got_plt_entry); | |
2794 | else | |
2795 | { | |
2796 | s->size += plt_entry_size; | |
6725bdbf | 2797 | |
dd7e64d4 L |
2798 | /* We also need to make an entry in the .got.plt section, |
2799 | which will be placed in the .got section by the linker | |
2800 | script. */ | |
2801 | htab->elf.sgotplt->size += 4; | |
6725bdbf | 2802 | |
aec6b87e L |
2803 | /* There should be no PLT relocation against resolved |
2804 | undefined weak symbol in executable. */ | |
2805 | if (!resolved_to_zero) | |
2806 | { | |
2807 | /* We also need to make an entry in the .rel.plt | |
2808 | section. */ | |
2809 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); | |
2810 | htab->elf.srelplt->reloc_count++; | |
2811 | } | |
dd7e64d4 | 2812 | } |
eac338cf | 2813 | |
23209a78 | 2814 | if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks |
0e1862bb | 2815 | && !bfd_link_pic (info)) |
eac338cf PB |
2816 | { |
2817 | /* VxWorks has a second set of relocations for each PLT entry | |
2818 | in executables. They go in a separate relocation section, | |
2819 | which is processed by the kernel loader. */ | |
2820 | ||
2821 | /* There are two relocations for the initial PLT entry: an | |
2822 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an | |
2823 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
2824 | ||
25e762b9 | 2825 | if (h->plt.offset == plt_entry_size) |
eac338cf PB |
2826 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); |
2827 | ||
2828 | /* There are two extra relocations for each subsequent PLT entry: | |
2829 | an R_386_32 relocation for the GOT entry, and an R_386_32 | |
2830 | relocation for the PLT entry. */ | |
2831 | ||
2832 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); | |
2833 | } | |
6725bdbf | 2834 | } |
ced53ee5 AM |
2835 | else |
2836 | { | |
13f42277 | 2837 | eh->plt_got.offset = (bfd_vma) -1; |
51b64d56 | 2838 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2839 | h->needs_plt = 0; |
ced53ee5 | 2840 | } |
6725bdbf AM |
2841 | } |
2842 | else | |
2843 | { | |
13f42277 | 2844 | eh->plt_got.offset = (bfd_vma) -1; |
51b64d56 | 2845 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2846 | h->needs_plt = 0; |
6725bdbf AM |
2847 | } |
2848 | ||
67a4f2b7 AO |
2849 | eh->tlsdesc_got = (bfd_vma) -1; |
2850 | ||
37e55690 | 2851 | /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary, |
13ae64f3 JJ |
2852 | make it a R_386_TLS_LE_32 requiring no TLS entry. */ |
2853 | if (h->got.refcount > 0 | |
0e1862bb | 2854 | && bfd_link_executable (info) |
13ae64f3 | 2855 | && h->dynindx == -1 |
37e55690 | 2856 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE)) |
cedb70c5 | 2857 | h->got.offset = (bfd_vma) -1; |
13ae64f3 | 2858 | else if (h->got.refcount > 0) |
6725bdbf | 2859 | { |
0ac8d2ca | 2860 | asection *s; |
b34976b6 | 2861 | bfd_boolean dyn; |
13ae64f3 | 2862 | int tls_type = elf_i386_hash_entry(h)->tls_type; |
6725bdbf | 2863 | |
5a15f56f AM |
2864 | /* Make sure this symbol is output as a dynamic symbol. |
2865 | Undefined weak syms won't yet be marked as dynamic. */ | |
2866 | if (h->dynindx == -1 | |
aec6b87e L |
2867 | && !h->forced_local |
2868 | && !resolved_to_zero) | |
5a15f56f | 2869 | { |
c152c796 | 2870 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2871 | return FALSE; |
5a15f56f AM |
2872 | } |
2873 | ||
6de2ae4a | 2874 | s = htab->elf.sgot; |
67a4f2b7 AO |
2875 | if (GOT_TLS_GDESC_P (tls_type)) |
2876 | { | |
6de2ae4a | 2877 | eh->tlsdesc_got = htab->elf.sgotplt->size |
67a4f2b7 | 2878 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 2879 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
2880 | h->got.offset = (bfd_vma) -2; |
2881 | } | |
2882 | if (! GOT_TLS_GDESC_P (tls_type) | |
2883 | || GOT_TLS_GD_P (tls_type)) | |
2884 | { | |
2885 | h->got.offset = s->size; | |
2886 | s->size += 4; | |
2887 | /* R_386_TLS_GD needs 2 consecutive GOT slots. */ | |
2888 | if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH) | |
2889 | s->size += 4; | |
2890 | } | |
ebe50bae | 2891 | dyn = htab->elf.dynamic_sections_created; |
13ae64f3 | 2892 | /* R_386_TLS_IE_32 needs one dynamic relocation, |
37e55690 JJ |
2893 | R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation, |
2894 | (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we | |
2895 | need two), R_386_TLS_GD needs one if local symbol and two if | |
aec6b87e L |
2896 | global. No dynamic relocation against resolved undefined weak |
2897 | symbol in executable. */ | |
37e55690 | 2898 | if (tls_type == GOT_TLS_IE_BOTH) |
6de2ae4a | 2899 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 | 2900 | else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
37e55690 | 2901 | || (tls_type & GOT_TLS_IE)) |
6de2ae4a | 2902 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2903 | else if (GOT_TLS_GD_P (tls_type)) |
6de2ae4a | 2904 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 | 2905 | else if (! GOT_TLS_GDESC_P (tls_type) |
aec6b87e L |
2906 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
2907 | && !resolved_to_zero) | |
67a4f2b7 | 2908 | || h->root.type != bfd_link_hash_undefweak) |
0e1862bb | 2909 | && (bfd_link_pic (info) |
ef5aade5 | 2910 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
6de2ae4a | 2911 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2912 | if (GOT_TLS_GDESC_P (tls_type)) |
6de2ae4a | 2913 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
6725bdbf AM |
2914 | } |
2915 | else | |
51b64d56 | 2916 | h->got.offset = (bfd_vma) -1; |
6725bdbf | 2917 | |
5a15f56f | 2918 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2919 | return TRUE; |
5a15f56f | 2920 | |
0c715baa AM |
2921 | /* In the shared -Bsymbolic case, discard space allocated for |
2922 | dynamic pc-relative relocs against symbols which turn out to be | |
2923 | defined in regular objects. For the normal shared case, discard | |
0ac8d2ca AM |
2924 | space for pc-relative relocs that have become local due to symbol |
2925 | visibility changes. */ | |
0c715baa | 2926 | |
0e1862bb | 2927 | if (bfd_link_pic (info)) |
5a15f56f | 2928 | { |
09695f56 AM |
2929 | /* The only reloc that uses pc_count is R_386_PC32, which will |
2930 | appear on a call or on something like ".long foo - .". We | |
2931 | want calls to protected symbols to resolve directly to the | |
2932 | function rather than going via the plt. If people want | |
2933 | function pointer comparisons to work as expected then they | |
2934 | should avoid writing assembly like ".long foo - .". */ | |
2935 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
5a15f56f | 2936 | { |
e03a8ed8 | 2937 | struct elf_dyn_relocs **pp; |
0c715baa AM |
2938 | |
2939 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2940 | { | |
c3ce498c L |
2941 | p->count -= p->pc_count; |
2942 | p->pc_count = 0; | |
0c715baa AM |
2943 | if (p->count == 0) |
2944 | *pp = p->next; | |
2945 | else | |
2946 | pp = &p->next; | |
2947 | } | |
5a15f56f | 2948 | } |
4e795f50 | 2949 | |
23209a78 | 2950 | if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks) |
3348747a | 2951 | { |
e03a8ed8 | 2952 | struct elf_dyn_relocs **pp; |
3348747a NS |
2953 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
2954 | { | |
2955 | if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) | |
2956 | *pp = p->next; | |
2957 | else | |
2958 | pp = &p->next; | |
2959 | } | |
2960 | } | |
2961 | ||
4e795f50 | 2962 | /* Also discard relocs on undefined weak syms with non-default |
aec6b87e | 2963 | visibility or in PIE. */ |
22d606e9 | 2964 | if (eh->dyn_relocs != NULL |
c353e543 | 2965 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 | 2966 | { |
aec6b87e L |
2967 | /* Undefined weak symbol is never bound locally in shared |
2968 | library. */ | |
2969 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2970 | || resolved_to_zero) | |
2971 | { | |
2972 | if (h->non_got_ref) | |
2973 | { | |
2974 | /* Keep dynamic non-GOT/non-PLT relocation so that we | |
2975 | can branch to 0 without PLT. */ | |
2976 | struct elf_dyn_relocs **pp; | |
2977 | ||
2978 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2979 | if (p->pc_count == 0) | |
2980 | *pp = p->next; | |
2981 | else | |
2982 | { | |
2983 | /* Remove non-R_386_PC32 relocation. */ | |
2984 | p->count = p->pc_count; | |
2985 | pp = &p->next; | |
2986 | } | |
22d606e9 | 2987 | |
aec6b87e L |
2988 | if (eh->dyn_relocs != NULL) |
2989 | { | |
2990 | /* Make sure undefined weak symbols are output | |
2991 | as dynamic symbols in PIEs for dynamic non-GOT | |
2992 | non-PLT reloations. */ | |
2993 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2994 | return FALSE; | |
2995 | } | |
2996 | } | |
2997 | else | |
2998 | eh->dyn_relocs = NULL; | |
2999 | } | |
22d606e9 AM |
3000 | else if (h->dynindx == -1 |
3001 | && !h->forced_local) | |
3002 | { | |
3003 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
3004 | return FALSE; | |
3005 | } | |
3006 | } | |
0c715baa | 3007 | } |
a23b6845 | 3008 | else if (ELIMINATE_COPY_RELOCS) |
0c715baa AM |
3009 | { |
3010 | /* For the non-shared case, discard space for relocs against | |
3011 | symbols which turn out to need copy relocs or are not | |
04ebc307 L |
3012 | dynamic. Keep dynamic relocations for run-time function |
3013 | pointer initialization. */ | |
0c715baa | 3014 | |
aec6b87e L |
3015 | if ((!h->non_got_ref |
3016 | || eh->func_pointer_refcount > 0 | |
3017 | || (h->root.type == bfd_link_hash_undefweak | |
3018 | && !resolved_to_zero)) | |
f5385ebf AM |
3019 | && ((h->def_dynamic |
3020 | && !h->def_regular) | |
ebe50bae | 3021 | || (htab->elf.dynamic_sections_created |
0c715baa AM |
3022 | && (h->root.type == bfd_link_hash_undefweak |
3023 | || h->root.type == bfd_link_hash_undefined)))) | |
3024 | { | |
3025 | /* Make sure this symbol is output as a dynamic symbol. | |
3026 | Undefined weak syms won't yet be marked as dynamic. */ | |
3027 | if (h->dynindx == -1 | |
aec6b87e L |
3028 | && !h->forced_local |
3029 | && !resolved_to_zero) | |
0c715baa | 3030 | { |
c152c796 | 3031 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 3032 | return FALSE; |
0c715baa | 3033 | } |
5a15f56f | 3034 | |
0c715baa AM |
3035 | /* If that succeeded, we know we'll be keeping all the |
3036 | relocs. */ | |
3037 | if (h->dynindx != -1) | |
3038 | goto keep; | |
3039 | } | |
3040 | ||
3041 | eh->dyn_relocs = NULL; | |
04ebc307 | 3042 | eh->func_pointer_refcount = 0; |
0c715baa | 3043 | |
ec338859 | 3044 | keep: ; |
5a15f56f AM |
3045 | } |
3046 | ||
0c715baa AM |
3047 | /* Finally, allocate space. */ |
3048 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
12d0ee4a | 3049 | { |
e7c33416 NC |
3050 | asection *sreloc; |
3051 | ||
cbe950e9 | 3052 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
3053 | |
3054 | BFD_ASSERT (sreloc != NULL); | |
eea6121a | 3055 | sreloc->size += p->count * sizeof (Elf32_External_Rel); |
12d0ee4a AM |
3056 | } |
3057 | ||
b34976b6 | 3058 | return TRUE; |
6725bdbf AM |
3059 | } |
3060 | ||
c25bc9fc L |
3061 | /* Allocate space in .plt, .got and associated reloc sections for |
3062 | local dynamic relocs. */ | |
3063 | ||
3064 | static bfd_boolean | |
3065 | elf_i386_allocate_local_dynrelocs (void **slot, void *inf) | |
3066 | { | |
3067 | struct elf_link_hash_entry *h | |
3068 | = (struct elf_link_hash_entry *) *slot; | |
3069 | ||
3070 | if (h->type != STT_GNU_IFUNC | |
3071 | || !h->def_regular | |
3072 | || !h->ref_regular | |
3073 | || !h->forced_local | |
3074 | || h->root.type != bfd_link_hash_defined) | |
3075 | abort (); | |
3076 | ||
3077 | return elf_i386_allocate_dynrelocs (h, inf); | |
3078 | } | |
3079 | ||
0c715baa AM |
3080 | /* Find any dynamic relocs that apply to read-only sections. */ |
3081 | ||
b34976b6 | 3082 | static bfd_boolean |
eb4ff4d6 | 3083 | elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
0c715baa AM |
3084 | { |
3085 | struct elf_i386_link_hash_entry *eh; | |
e03a8ed8 | 3086 | struct elf_dyn_relocs *p; |
0c715baa | 3087 | |
aa715242 L |
3088 | /* Skip local IFUNC symbols. */ |
3089 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
3090 | return TRUE; | |
3091 | ||
0c715baa AM |
3092 | eh = (struct elf_i386_link_hash_entry *) h; |
3093 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
3094 | { | |
3095 | asection *s = p->sec->output_section; | |
3096 | ||
3097 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
3098 | { | |
3099 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
3100 | ||
3101 | info->flags |= DF_TEXTREL; | |
3102 | ||
0e1862bb | 3103 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd | 3104 | || info->error_textrel) |
695344c0 | 3105 | /* xgettext:c-format */ |
1952c5cd | 3106 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"), |
b70321a2 L |
3107 | p->sec->owner, h->root.root.string, |
3108 | p->sec); | |
3109 | ||
0c715baa | 3110 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 3111 | return FALSE; |
0c715baa AM |
3112 | } |
3113 | } | |
b34976b6 | 3114 | return TRUE; |
0c715baa AM |
3115 | } |
3116 | ||
c175a657 | 3117 | /* Convert load via the GOT slot to load immediate. */ |
daa67607 L |
3118 | |
3119 | static bfd_boolean | |
02a86693 | 3120 | elf_i386_convert_load (bfd *abfd, asection *sec, |
a6af384b | 3121 | struct bfd_link_info *link_info) |
daa67607 | 3122 | { |
c175a657 | 3123 | struct elf_i386_link_hash_table *htab; |
daa67607 L |
3124 | Elf_Internal_Shdr *symtab_hdr; |
3125 | Elf_Internal_Rela *internal_relocs; | |
3126 | Elf_Internal_Rela *irel, *irelend; | |
3127 | bfd_byte *contents; | |
c175a657 | 3128 | bfd_boolean changed; |
daa67607 L |
3129 | bfd_signed_vma *local_got_refcounts; |
3130 | ||
3131 | /* Don't even try to convert non-ELF outputs. */ | |
3132 | if (!is_elf_hash_table (link_info->hash)) | |
3133 | return FALSE; | |
3134 | ||
c1d11331 | 3135 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 3136 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
02a86693 | 3137 | || sec->need_convert_load == 0 |
c8831961 | 3138 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
3139 | return TRUE; |
3140 | ||
3141 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3142 | ||
3143 | /* Load the relocations for this section. */ | |
3144 | internal_relocs = (_bfd_elf_link_read_relocs | |
3145 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
3146 | link_info->keep_memory)); | |
3147 | if (internal_relocs == NULL) | |
3148 | return FALSE; | |
3149 | ||
c175a657 | 3150 | changed = FALSE; |
daa67607 | 3151 | htab = elf_i386_hash_table (link_info); |
daa67607 L |
3152 | local_got_refcounts = elf_local_got_refcounts (abfd); |
3153 | ||
3154 | /* Get the section contents. */ | |
3155 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
3156 | contents = elf_section_data (sec)->this_hdr.contents; | |
3157 | else | |
3158 | { | |
3159 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
3160 | goto error_return; | |
3161 | } | |
3162 | ||
3163 | irelend = internal_relocs + sec->reloc_count; | |
3164 | for (irel = internal_relocs; irel < irelend; irel++) | |
3165 | { | |
3166 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
c175a657 | 3167 | unsigned int r_symndx; |
daa67607 | 3168 | struct elf_link_hash_entry *h; |
c175a657 | 3169 | bfd_boolean converted; |
daa67607 | 3170 | |
7d4d9709 L |
3171 | /* Don't convert R_386_GOT32 since we can't tell if it is applied |
3172 | to "mov $foo@GOT, %reg" which isn't a load via GOT. */ | |
3173 | if (r_type != R_386_GOT32X) | |
daa67607 L |
3174 | continue; |
3175 | ||
c175a657 | 3176 | r_symndx = ELF32_R_SYM (irel->r_info); |
02a86693 | 3177 | if (r_symndx < symtab_hdr->sh_info) |
c175a657 L |
3178 | h = elf_i386_get_local_sym_hash (htab, sec->owner, |
3179 | (const Elf_Internal_Rela *) irel, | |
3180 | FALSE); | |
3181 | else | |
02a86693 | 3182 | { |
c175a657 L |
3183 | h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info]; |
3184 | while (h->root.type == bfd_link_hash_indirect | |
3185 | || h->root.type == bfd_link_hash_warning) | |
3186 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
daa67607 L |
3187 | } |
3188 | ||
02a86693 | 3189 | /* STT_GNU_IFUNC must keep GOT32 relocations. */ |
c175a657 | 3190 | if (h != NULL && h->type == STT_GNU_IFUNC) |
02a86693 L |
3191 | continue; |
3192 | ||
c175a657 L |
3193 | converted = FALSE; |
3194 | if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents, | |
3195 | irel, h, &converted, link_info)) | |
3196 | goto error_return; | |
bae420ef | 3197 | |
c175a657 | 3198 | if (converted) |
02a86693 | 3199 | { |
c175a657 L |
3200 | changed = converted; |
3201 | if (h) | |
02a86693 | 3202 | { |
c175a657 L |
3203 | if (h->got.refcount > 0) |
3204 | h->got.refcount -= 1; | |
02a86693 | 3205 | } |
c175a657 | 3206 | else |
02a86693 | 3207 | { |
c175a657 L |
3208 | if (local_got_refcounts != NULL |
3209 | && local_got_refcounts[r_symndx] > 0) | |
3210 | local_got_refcounts[r_symndx] -= 1; | |
02a86693 | 3211 | } |
daa67607 L |
3212 | } |
3213 | } | |
3214 | ||
3215 | if (contents != NULL | |
3216 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3217 | { | |
c175a657 | 3218 | if (!changed && !link_info->keep_memory) |
daa67607 L |
3219 | free (contents); |
3220 | else | |
3221 | { | |
3222 | /* Cache the section contents for elf_link_input_bfd. */ | |
3223 | elf_section_data (sec)->this_hdr.contents = contents; | |
3224 | } | |
3225 | } | |
3226 | ||
3227 | if (elf_section_data (sec)->relocs != internal_relocs) | |
3228 | { | |
c175a657 | 3229 | if (!changed) |
daa67607 L |
3230 | free (internal_relocs); |
3231 | else | |
3232 | elf_section_data (sec)->relocs = internal_relocs; | |
3233 | } | |
3234 | ||
3235 | return TRUE; | |
3236 | ||
3237 | error_return: | |
3238 | if (contents != NULL | |
3239 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3240 | free (contents); | |
3241 | if (internal_relocs != NULL | |
3242 | && elf_section_data (sec)->relocs != internal_relocs) | |
3243 | free (internal_relocs); | |
3244 | return FALSE; | |
3245 | } | |
3246 | ||
252b5132 RH |
3247 | /* Set the sizes of the dynamic sections. */ |
3248 | ||
b34976b6 | 3249 | static bfd_boolean |
23209a78 | 3250 | elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
252b5132 | 3251 | { |
6725bdbf | 3252 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
3253 | bfd *dynobj; |
3254 | asection *s; | |
b34976b6 | 3255 | bfd_boolean relocs; |
0c715baa | 3256 | bfd *ibfd; |
252b5132 | 3257 | |
6725bdbf | 3258 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
3259 | if (htab == NULL) |
3260 | return FALSE; | |
ebe50bae | 3261 | dynobj = htab->elf.dynobj; |
ffb2e45b AM |
3262 | if (dynobj == NULL) |
3263 | abort (); | |
252b5132 | 3264 | |
0c715baa AM |
3265 | /* Set up .got offsets for local syms, and space for local dynamic |
3266 | relocs. */ | |
c72f2fb2 | 3267 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
161d71a6 L |
3268 | { |
3269 | bfd_signed_vma *local_got; | |
3270 | bfd_signed_vma *end_local_got; | |
13ae64f3 | 3271 | char *local_tls_type; |
67a4f2b7 | 3272 | bfd_vma *local_tlsdesc_gotent; |
161d71a6 L |
3273 | bfd_size_type locsymcount; |
3274 | Elf_Internal_Shdr *symtab_hdr; | |
3275 | asection *srel; | |
6725bdbf | 3276 | |
0ffa91dd | 3277 | if (! is_i386_elf (ibfd)) |
161d71a6 | 3278 | continue; |
6725bdbf | 3279 | |
0c715baa AM |
3280 | for (s = ibfd->sections; s != NULL; s = s->next) |
3281 | { | |
e03a8ed8 | 3282 | struct elf_dyn_relocs *p; |
0c715baa | 3283 | |
02a86693 | 3284 | if (!elf_i386_convert_load (ibfd, s, info)) |
daa67607 L |
3285 | return FALSE; |
3286 | ||
e03a8ed8 | 3287 | for (p = ((struct elf_dyn_relocs *) |
e81d3500 | 3288 | elf_section_data (s)->local_dynrel); |
ec338859 AM |
3289 | p != NULL; |
3290 | p = p->next) | |
0c715baa | 3291 | { |
ec338859 AM |
3292 | if (!bfd_is_abs_section (p->sec) |
3293 | && bfd_is_abs_section (p->sec->output_section)) | |
3294 | { | |
3295 | /* Input section has been discarded, either because | |
3296 | it is a copy of a linkonce section or due to | |
3297 | linker script /DISCARD/, so we'll be discarding | |
3298 | the relocs too. */ | |
3299 | } | |
23209a78 | 3300 | else if (get_elf_i386_backend_data (output_bfd)->is_vxworks |
3348747a NS |
3301 | && strcmp (p->sec->output_section->name, |
3302 | ".tls_vars") == 0) | |
3303 | { | |
3304 | /* Relocations in vxworks .tls_vars sections are | |
3305 | handled specially by the loader. */ | |
3306 | } | |
248866a8 | 3307 | else if (p->count != 0) |
ec338859 AM |
3308 | { |
3309 | srel = elf_section_data (p->sec)->sreloc; | |
eea6121a | 3310 | srel->size += p->count * sizeof (Elf32_External_Rel); |
4b819e1f L |
3311 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
3312 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
3313 | { |
3314 | info->flags |= DF_TEXTREL; | |
0e1862bb | 3315 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd | 3316 | || info->error_textrel) |
695344c0 | 3317 | /* xgettext:c-format */ |
1952c5cd | 3318 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), |
b70321a2 | 3319 | p->sec->owner, p->sec); |
b70321a2 | 3320 | } |
ec338859 | 3321 | } |
0c715baa AM |
3322 | } |
3323 | } | |
3324 | ||
3325 | local_got = elf_local_got_refcounts (ibfd); | |
161d71a6 L |
3326 | if (!local_got) |
3327 | continue; | |
6725bdbf | 3328 | |
0ffa91dd | 3329 | symtab_hdr = &elf_symtab_hdr (ibfd); |
161d71a6 L |
3330 | locsymcount = symtab_hdr->sh_info; |
3331 | end_local_got = local_got + locsymcount; | |
13ae64f3 | 3332 | local_tls_type = elf_i386_local_got_tls_type (ibfd); |
67a4f2b7 | 3333 | local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd); |
6de2ae4a L |
3334 | s = htab->elf.sgot; |
3335 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
3336 | for (; local_got < end_local_got; |
3337 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
161d71a6 | 3338 | { |
67a4f2b7 | 3339 | *local_tlsdesc_gotent = (bfd_vma) -1; |
161d71a6 | 3340 | if (*local_got > 0) |
6725bdbf | 3341 | { |
67a4f2b7 AO |
3342 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
3343 | { | |
6de2ae4a | 3344 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
67a4f2b7 | 3345 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 3346 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
3347 | *local_got = (bfd_vma) -2; |
3348 | } | |
3349 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3350 | || GOT_TLS_GD_P (*local_tls_type)) | |
3351 | { | |
3352 | *local_got = s->size; | |
3353 | s->size += 4; | |
3354 | if (GOT_TLS_GD_P (*local_tls_type) | |
3355 | || *local_tls_type == GOT_TLS_IE_BOTH) | |
3356 | s->size += 4; | |
3357 | } | |
0e1862bb | 3358 | if (bfd_link_pic (info) |
67a4f2b7 | 3359 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
37e55690 JJ |
3360 | || (*local_tls_type & GOT_TLS_IE)) |
3361 | { | |
3362 | if (*local_tls_type == GOT_TLS_IE_BOTH) | |
eea6121a | 3363 | srel->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
3364 | else if (GOT_TLS_GD_P (*local_tls_type) |
3365 | || ! GOT_TLS_GDESC_P (*local_tls_type)) | |
eea6121a | 3366 | srel->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 3367 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
6de2ae4a | 3368 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
37e55690 | 3369 | } |
6725bdbf | 3370 | } |
161d71a6 L |
3371 | else |
3372 | *local_got = (bfd_vma) -1; | |
6725bdbf | 3373 | } |
252b5132 | 3374 | } |
6725bdbf | 3375 | |
13ae64f3 JJ |
3376 | if (htab->tls_ldm_got.refcount > 0) |
3377 | { | |
3378 | /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM | |
3379 | relocs. */ | |
6de2ae4a L |
3380 | htab->tls_ldm_got.offset = htab->elf.sgot->size; |
3381 | htab->elf.sgot->size += 8; | |
3382 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); | |
13ae64f3 JJ |
3383 | } |
3384 | else | |
3385 | htab->tls_ldm_got.offset = -1; | |
3386 | ||
0c715baa AM |
3387 | /* Allocate global sym .plt and .got entries, and space for global |
3388 | sym dynamic relocs. */ | |
eb4ff4d6 | 3389 | elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info); |
252b5132 | 3390 | |
c25bc9fc L |
3391 | /* Allocate .plt and .got entries, and space for local symbols. */ |
3392 | htab_traverse (htab->loc_hash_table, | |
3393 | elf_i386_allocate_local_dynrelocs, | |
3394 | info); | |
3395 | ||
67a4f2b7 AO |
3396 | /* For every jump slot reserved in the sgotplt, reloc_count is |
3397 | incremented. However, when we reserve space for TLS descriptors, | |
3398 | it's not incremented, so in order to compute the space reserved | |
3399 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 | 3400 | slot size. |
caa0075c | 3401 | |
e1f98742 L |
3402 | PR ld/13302: We start next_irelative_index at the end of .rela.plt |
3403 | so that R_386_IRELATIVE entries come last. */ | |
6de2ae4a | 3404 | if (htab->elf.srelplt) |
e1f98742 L |
3405 | { |
3406 | htab->next_tls_desc_index = htab->elf.srelplt->reloc_count; | |
3407 | htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4; | |
3408 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
3409 | } | |
3410 | else if (htab->elf.irelplt) | |
3411 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
3412 | ||
67a4f2b7 | 3413 | |
a7b16ceb L |
3414 | if (htab->elf.sgotplt) |
3415 | { | |
3416 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
9a2a56cc | 3417 | entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
3418 | if ((htab->elf.hgot == NULL |
3419 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
3420 | && (htab->elf.sgotplt->size |
3421 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
3422 | && (htab->elf.splt == NULL |
3423 | || htab->elf.splt->size == 0) | |
3424 | && (htab->elf.sgot == NULL | |
3425 | || htab->elf.sgot->size == 0) | |
3426 | && (htab->elf.iplt == NULL | |
3427 | || htab->elf.iplt->size == 0) | |
3428 | && (htab->elf.igotplt == NULL | |
3429 | || htab->elf.igotplt->size == 0)) | |
3430 | htab->elf.sgotplt->size = 0; | |
3431 | } | |
3432 | ||
fff53dae L |
3433 | if (_bfd_elf_eh_frame_present (info)) |
3434 | { | |
3435 | if (htab->plt_eh_frame != NULL | |
3436 | && htab->elf.splt != NULL | |
3437 | && htab->elf.splt->size != 0 | |
3438 | && !bfd_is_abs_section (htab->elf.splt->output_section)) | |
3439 | htab->plt_eh_frame->size | |
3440 | = get_elf_i386_backend_data (output_bfd)->plt->eh_frame_plt_size; | |
3441 | ||
3442 | if (htab->plt_got_eh_frame != NULL | |
3443 | && htab->plt_got != NULL | |
3444 | && htab->plt_got->size != 0 | |
3445 | && !bfd_is_abs_section (htab->plt_got->output_section)) | |
3446 | htab->plt_got_eh_frame->size | |
3447 | = get_elf_i386_backend_data (output_bfd)->plt->eh_frame_plt_got_size; | |
3448 | } | |
9a2a56cc | 3449 | |
5a15f56f AM |
3450 | /* We now have determined the sizes of the various dynamic sections. |
3451 | Allocate memory for them. */ | |
b34976b6 | 3452 | relocs = FALSE; |
252b5132 RH |
3453 | for (s = dynobj->sections; s != NULL; s = s->next) |
3454 | { | |
eac338cf PB |
3455 | bfd_boolean strip_section = TRUE; |
3456 | ||
252b5132 RH |
3457 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
3458 | continue; | |
3459 | ||
6de2ae4a | 3460 | if (s == htab->elf.splt |
9a2a56cc | 3461 | || s == htab->elf.sgot) |
252b5132 | 3462 | { |
6725bdbf AM |
3463 | /* Strip this section if we don't need it; see the |
3464 | comment below. */ | |
eac338cf PB |
3465 | /* We'd like to strip these sections if they aren't needed, but if |
3466 | we've exported dynamic symbols from them we must leave them. | |
3467 | It's too late to tell BFD to get rid of the symbols. */ | |
3468 | ||
7325306f | 3469 | if (htab->elf.hplt != NULL) |
eac338cf | 3470 | strip_section = FALSE; |
252b5132 | 3471 | } |
9a2a56cc AM |
3472 | else if (s == htab->elf.sgotplt |
3473 | || s == htab->elf.iplt | |
3474 | || s == htab->elf.igotplt | |
dd7e64d4 | 3475 | || s == htab->plt_got |
9a2a56cc | 3476 | || s == htab->plt_eh_frame |
fff53dae | 3477 | || s == htab->plt_got_eh_frame |
5474d94f AM |
3478 | || s == htab->elf.sdynbss |
3479 | || s == htab->elf.sdynrelro) | |
9a2a56cc AM |
3480 | { |
3481 | /* Strip these too. */ | |
3482 | } | |
0112cd26 | 3483 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel")) |
252b5132 | 3484 | { |
6de2ae4a L |
3485 | if (s->size != 0 |
3486 | && s != htab->elf.srelplt | |
3487 | && s != htab->srelplt2) | |
b34976b6 | 3488 | relocs = TRUE; |
252b5132 | 3489 | |
0ac8d2ca AM |
3490 | /* We use the reloc_count field as a counter if we need |
3491 | to copy relocs into the output file. */ | |
5ae0bfb6 | 3492 | s->reloc_count = 0; |
252b5132 | 3493 | } |
6725bdbf | 3494 | else |
252b5132 RH |
3495 | { |
3496 | /* It's not one of our sections, so don't allocate space. */ | |
3497 | continue; | |
3498 | } | |
3499 | ||
c456f082 | 3500 | if (s->size == 0) |
252b5132 | 3501 | { |
0ac8d2ca AM |
3502 | /* If we don't need this section, strip it from the |
3503 | output file. This is mostly to handle .rel.bss and | |
3504 | .rel.plt. We must create both sections in | |
3505 | create_dynamic_sections, because they must be created | |
3506 | before the linker maps input sections to output | |
3507 | sections. The linker does that before | |
3508 | adjust_dynamic_symbol is called, and it is that | |
3509 | function which decides whether anything needs to go | |
3510 | into these sections. */ | |
c456f082 AM |
3511 | if (strip_section) |
3512 | s->flags |= SEC_EXCLUDE; | |
252b5132 RH |
3513 | continue; |
3514 | } | |
3515 | ||
c456f082 AM |
3516 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3517 | continue; | |
3518 | ||
f69da49f AM |
3519 | /* Allocate memory for the section contents. We use bfd_zalloc |
3520 | here in case unused entries are not reclaimed before the | |
3521 | section's contents are written out. This should not happen, | |
3522 | but this way if it does, we get a R_386_NONE reloc instead | |
3523 | of garbage. */ | |
a50b1753 | 3524 | s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size); |
6725bdbf | 3525 | if (s->contents == NULL) |
b34976b6 | 3526 | return FALSE; |
252b5132 RH |
3527 | } |
3528 | ||
e41b3a13 | 3529 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3530 | && htab->plt_eh_frame->contents != NULL) |
3531 | { | |
f129e49f L |
3532 | memcpy (htab->plt_eh_frame->contents, |
3533 | get_elf_i386_backend_data (output_bfd)->plt->eh_frame_plt, | |
3534 | htab->plt_eh_frame->size); | |
9a2a56cc AM |
3535 | bfd_put_32 (dynobj, htab->elf.splt->size, |
3536 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
3537 | } | |
e41b3a13 | 3538 | |
fff53dae L |
3539 | if (htab->plt_got_eh_frame != NULL |
3540 | && htab->plt_got_eh_frame->contents != NULL) | |
3541 | { | |
3542 | memcpy (htab->plt_got_eh_frame->contents, | |
3543 | get_elf_i386_backend_data (output_bfd)->plt->eh_frame_plt_got, | |
3544 | htab->plt_got_eh_frame->size); | |
3545 | bfd_put_32 (dynobj, htab->plt_got->size, | |
3546 | (htab->plt_got_eh_frame->contents | |
3547 | + PLT_FDE_LEN_OFFSET)); | |
3548 | } | |
3549 | ||
ebe50bae | 3550 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
3551 | { |
3552 | /* Add some entries to the .dynamic section. We fill in the | |
3553 | values later, in elf_i386_finish_dynamic_sections, but we | |
3554 | must add the entries now so that we get the correct size for | |
3555 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
3556 | dynamic linker and used by the debugger. */ | |
dc810e39 | 3557 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3558 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3559 | |
0e1862bb | 3560 | if (bfd_link_executable (info)) |
252b5132 | 3561 | { |
dc810e39 | 3562 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3563 | return FALSE; |
252b5132 RH |
3564 | } |
3565 | ||
6de2ae4a | 3566 | if (htab->elf.splt->size != 0) |
252b5132 | 3567 | { |
7c1e8d3e L |
3568 | /* DT_PLTGOT is used by prelink even if there is no PLT |
3569 | relocation. */ | |
3570 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
b34976b6 | 3571 | return FALSE; |
7c1e8d3e L |
3572 | |
3573 | if (htab->elf.srelplt->size != 0) | |
3574 | { | |
3575 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
3576 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
3577 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
3578 | return FALSE; | |
3579 | } | |
252b5132 RH |
3580 | } |
3581 | ||
3582 | if (relocs) | |
3583 | { | |
dc810e39 AM |
3584 | if (!add_dynamic_entry (DT_REL, 0) |
3585 | || !add_dynamic_entry (DT_RELSZ, 0) | |
3586 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
b34976b6 | 3587 | return FALSE; |
252b5132 | 3588 | |
0c715baa AM |
3589 | /* If any dynamic relocs apply to a read-only section, |
3590 | then we need a DT_TEXTREL entry. */ | |
248866a8 | 3591 | if ((info->flags & DF_TEXTREL) == 0) |
eb4ff4d6 L |
3592 | elf_link_hash_traverse (&htab->elf, |
3593 | elf_i386_readonly_dynrelocs, info); | |
0c715baa AM |
3594 | |
3595 | if ((info->flags & DF_TEXTREL) != 0) | |
3596 | { | |
2df3368d | 3597 | if (htab->readonly_dynrelocs_against_ifunc) |
8efa2874 L |
3598 | { |
3599 | info->callbacks->einfo | |
3600 | (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n")); | |
3601 | bfd_set_error (bfd_error_bad_value); | |
3602 | return FALSE; | |
3603 | } | |
3604 | ||
0c715baa | 3605 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 3606 | return FALSE; |
0c715baa | 3607 | } |
252b5132 | 3608 | } |
23209a78 | 3609 | if (get_elf_i386_backend_data (output_bfd)->is_vxworks |
7a2b07ff NS |
3610 | && !elf_vxworks_add_dynamic_entries (output_bfd, info)) |
3611 | return FALSE; | |
252b5132 | 3612 | } |
dc810e39 | 3613 | #undef add_dynamic_entry |
252b5132 | 3614 | |
b34976b6 | 3615 | return TRUE; |
252b5132 RH |
3616 | } |
3617 | ||
67a4f2b7 AO |
3618 | static bfd_boolean |
3619 | elf_i386_always_size_sections (bfd *output_bfd, | |
3620 | struct bfd_link_info *info) | |
3621 | { | |
3622 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3623 | ||
3624 | if (tls_sec) | |
3625 | { | |
3626 | struct elf_link_hash_entry *tlsbase; | |
3627 | ||
3628 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3629 | "_TLS_MODULE_BASE_", | |
3630 | FALSE, FALSE, FALSE); | |
3631 | ||
3632 | if (tlsbase && tlsbase->type == STT_TLS) | |
3633 | { | |
4dfe6ac6 | 3634 | struct elf_i386_link_hash_table *htab; |
67a4f2b7 AO |
3635 | struct bfd_link_hash_entry *bh = NULL; |
3636 | const struct elf_backend_data *bed | |
3637 | = get_elf_backend_data (output_bfd); | |
3638 | ||
4dfe6ac6 NC |
3639 | htab = elf_i386_hash_table (info); |
3640 | if (htab == NULL) | |
3641 | return FALSE; | |
3642 | ||
67a4f2b7 AO |
3643 | if (!(_bfd_generic_link_add_one_symbol |
3644 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3645 | tls_sec, 0, NULL, FALSE, | |
3646 | bed->collect, &bh))) | |
3647 | return FALSE; | |
9f03412a | 3648 | |
4dfe6ac6 | 3649 | htab->tls_module_base = bh; |
9f03412a | 3650 | |
67a4f2b7 AO |
3651 | tlsbase = (struct elf_link_hash_entry *)bh; |
3652 | tlsbase->def_regular = 1; | |
3653 | tlsbase->other = STV_HIDDEN; | |
576fa883 | 3654 | tlsbase->root.linker_def = 1; |
67a4f2b7 AO |
3655 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
3656 | } | |
3657 | } | |
3658 | ||
3659 | return TRUE; | |
3660 | } | |
3661 | ||
38701953 AM |
3662 | /* Set the correct type for an x86 ELF section. We do this by the |
3663 | section name, which is a hack, but ought to work. */ | |
3664 | ||
b34976b6 | 3665 | static bfd_boolean |
55fd94b0 AM |
3666 | elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
3667 | Elf_Internal_Shdr *hdr, | |
3668 | asection *sec) | |
38701953 | 3669 | { |
91d6fa6a | 3670 | const char *name; |
38701953 AM |
3671 | |
3672 | name = bfd_get_section_name (abfd, sec); | |
3673 | ||
3674 | /* This is an ugly, but unfortunately necessary hack that is | |
3675 | needed when producing EFI binaries on x86. It tells | |
3676 | elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
3677 | containing ELF relocation info. We need this hack in order to | |
3678 | be able to generate ELF binaries that can be translated into | |
3679 | EFI applications (which are essentially COFF objects). Those | |
3680 | files contain a COFF ".reloc" section inside an ELFNN object, | |
3681 | which would normally cause BFD to segfault because it would | |
3682 | attempt to interpret this section as containing relocation | |
3683 | entries for section "oc". With this hack enabled, ".reloc" | |
3684 | will be treated as a normal data section, which will avoid the | |
3685 | segfault. However, you won't be able to create an ELFNN binary | |
3686 | with a section named "oc" that needs relocations, but that's | |
3687 | the kind of ugly side-effects you get when detecting section | |
3688 | types based on their names... In practice, this limitation is | |
3689 | unlikely to bite. */ | |
3690 | if (strcmp (name, ".reloc") == 0) | |
3691 | hdr->sh_type = SHT_PROGBITS; | |
3692 | ||
b34976b6 | 3693 | return TRUE; |
38701953 AM |
3694 | } |
3695 | ||
9f03412a AO |
3696 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
3697 | executables. Rather than setting it to the beginning of the TLS | |
3698 | section, we have to set it to the end. This function may be called | |
3699 | multiple times, it is idempotent. */ | |
3700 | ||
3701 | static void | |
eb4ff4d6 | 3702 | elf_i386_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 3703 | { |
4dfe6ac6 | 3704 | struct elf_i386_link_hash_table *htab; |
9f03412a AO |
3705 | struct bfd_link_hash_entry *base; |
3706 | ||
0e1862bb | 3707 | if (!bfd_link_executable (info)) |
9f03412a AO |
3708 | return; |
3709 | ||
4dfe6ac6 NC |
3710 | htab = elf_i386_hash_table (info); |
3711 | if (htab == NULL) | |
3712 | return; | |
9f03412a | 3713 | |
4dfe6ac6 NC |
3714 | base = htab->tls_module_base; |
3715 | if (base == NULL) | |
9f03412a AO |
3716 | return; |
3717 | ||
4dfe6ac6 | 3718 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
3719 | } |
3720 | ||
13ae64f3 JJ |
3721 | /* Return the base VMA address which should be subtracted from real addresses |
3722 | when resolving @dtpoff relocation. | |
3723 | This is PT_TLS segment p_vaddr. */ | |
3724 | ||
3725 | static bfd_vma | |
eb4ff4d6 | 3726 | elf_i386_dtpoff_base (struct bfd_link_info *info) |
13ae64f3 | 3727 | { |
e1918d23 AM |
3728 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3729 | if (elf_hash_table (info)->tls_sec == NULL) | |
6a30718d | 3730 | return 0; |
e1918d23 | 3731 | return elf_hash_table (info)->tls_sec->vma; |
13ae64f3 JJ |
3732 | } |
3733 | ||
3734 | /* Return the relocation value for @tpoff relocation | |
3735 | if STT_TLS virtual address is ADDRESS. */ | |
3736 | ||
3737 | static bfd_vma | |
eb4ff4d6 | 3738 | elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address) |
13ae64f3 | 3739 | { |
e1918d23 | 3740 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3741 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3742 | bfd_vma static_tls_size; | |
13ae64f3 | 3743 | |
e1918d23 AM |
3744 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3745 | if (htab->tls_sec == NULL) | |
6a30718d | 3746 | return 0; |
7dc98aea RO |
3747 | |
3748 | /* Consider special static TLS alignment requirements. */ | |
3749 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3750 | return static_tls_size + htab->tls_sec->vma - address; | |
13ae64f3 JJ |
3751 | } |
3752 | ||
252b5132 RH |
3753 | /* Relocate an i386 ELF section. */ |
3754 | ||
b34976b6 | 3755 | static bfd_boolean |
55fd94b0 AM |
3756 | elf_i386_relocate_section (bfd *output_bfd, |
3757 | struct bfd_link_info *info, | |
3758 | bfd *input_bfd, | |
3759 | asection *input_section, | |
3760 | bfd_byte *contents, | |
3761 | Elf_Internal_Rela *relocs, | |
3762 | Elf_Internal_Sym *local_syms, | |
3763 | asection **local_sections) | |
252b5132 | 3764 | { |
6725bdbf | 3765 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
3766 | Elf_Internal_Shdr *symtab_hdr; |
3767 | struct elf_link_hash_entry **sym_hashes; | |
3768 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3769 | bfd_vma *local_tlsdesc_gotents; |
252b5132 | 3770 | Elf_Internal_Rela *rel; |
60f2e42e | 3771 | Elf_Internal_Rela *wrel; |
252b5132 | 3772 | Elf_Internal_Rela *relend; |
3348747a | 3773 | bfd_boolean is_vxworks_tls; |
25e762b9 | 3774 | unsigned plt_entry_size; |
252b5132 | 3775 | |
0ffa91dd | 3776 | BFD_ASSERT (is_i386_elf (input_bfd)); |
6bbec505 | 3777 | |
c337a162 L |
3778 | /* Skip if check_relocs failed. */ |
3779 | if (input_section->check_relocs_failed) | |
3780 | return FALSE; | |
3781 | ||
6725bdbf | 3782 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
3783 | if (htab == NULL) |
3784 | return FALSE; | |
0ffa91dd | 3785 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
252b5132 RH |
3786 | sym_hashes = elf_sym_hashes (input_bfd); |
3787 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
67a4f2b7 | 3788 | local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd); |
3348747a NS |
3789 | /* We have to handle relocations in vxworks .tls_vars sections |
3790 | specially, because the dynamic loader is 'weird'. */ | |
23209a78 | 3791 | is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks |
0e1862bb | 3792 | && bfd_link_pic (info) |
3348747a NS |
3793 | && !strcmp (input_section->output_section->name, |
3794 | ".tls_vars")); | |
252b5132 | 3795 | |
eb4ff4d6 | 3796 | elf_i386_set_tls_module_base (info); |
9f03412a | 3797 | |
25e762b9 RM |
3798 | plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd); |
3799 | ||
60f2e42e | 3800 | rel = wrel = relocs; |
252b5132 | 3801 | relend = relocs + input_section->reloc_count; |
60f2e42e | 3802 | for (; rel < relend; wrel++, rel++) |
252b5132 | 3803 | { |
13ae64f3 | 3804 | unsigned int r_type; |
252b5132 RH |
3805 | reloc_howto_type *howto; |
3806 | unsigned long r_symndx; | |
3807 | struct elf_link_hash_entry *h; | |
dd7e64d4 | 3808 | struct elf_i386_link_hash_entry *eh; |
252b5132 RH |
3809 | Elf_Internal_Sym *sym; |
3810 | asection *sec; | |
dd7e64d4 | 3811 | bfd_vma off, offplt, plt_offset; |
252b5132 | 3812 | bfd_vma relocation; |
b34976b6 | 3813 | bfd_boolean unresolved_reloc; |
252b5132 | 3814 | bfd_reloc_status_type r; |
1b452ec6 | 3815 | unsigned int indx; |
13ae64f3 | 3816 | int tls_type; |
1788fc08 | 3817 | bfd_vma st_size; |
dd7e64d4 | 3818 | asection *resolved_plt; |
aec6b87e | 3819 | bfd_boolean resolved_to_zero; |
252b5132 RH |
3820 | |
3821 | r_type = ELF32_R_TYPE (rel->r_info); | |
55fd94b0 AM |
3822 | if (r_type == R_386_GNU_VTINHERIT |
3823 | || r_type == R_386_GNU_VTENTRY) | |
18954b29 L |
3824 | { |
3825 | if (wrel != rel) | |
3826 | *wrel = *rel; | |
3827 | continue; | |
3828 | } | |
dc47f327 | 3829 | |
55fd94b0 | 3830 | if ((indx = r_type) >= R_386_standard |
13ae64f3 JJ |
3831 | && ((indx = r_type - R_386_ext_offset) - R_386_standard |
3832 | >= R_386_ext - R_386_standard) | |
3833 | && ((indx = r_type - R_386_tls_offset) - R_386_ext | |
c74be520 | 3834 | >= R_386_ext2 - R_386_ext)) |
252b5132 | 3835 | { |
4eca0228 | 3836 | _bfd_error_handler |
695344c0 | 3837 | /* xgettext:c-format */ |
d003868e AM |
3838 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), |
3839 | input_bfd, input_section, r_type); | |
252b5132 | 3840 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 3841 | return FALSE; |
252b5132 | 3842 | } |
1b452ec6 | 3843 | howto = elf_howto_table + indx; |
252b5132 RH |
3844 | |
3845 | r_symndx = ELF32_R_SYM (rel->r_info); | |
252b5132 RH |
3846 | h = NULL; |
3847 | sym = NULL; | |
3848 | sec = NULL; | |
b34976b6 | 3849 | unresolved_reloc = FALSE; |
252b5132 RH |
3850 | if (r_symndx < symtab_hdr->sh_info) |
3851 | { | |
3852 | sym = local_syms + r_symndx; | |
3853 | sec = local_sections[r_symndx]; | |
3854 | relocation = (sec->output_section->vma | |
3855 | + sec->output_offset | |
3856 | + sym->st_value); | |
1788fc08 | 3857 | st_size = sym->st_size; |
ab96bf03 AM |
3858 | |
3859 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
3860 | && ((sec->flags & SEC_MERGE) != 0 | |
0e1862bb | 3861 | || (bfd_link_relocatable (info) |
ab96bf03 | 3862 | && sec->output_offset != 0))) |
f8df10f4 | 3863 | { |
f8df10f4 | 3864 | bfd_vma addend; |
4a335f3d | 3865 | bfd_byte *where = contents + rel->r_offset; |
f8df10f4 | 3866 | |
4a335f3d | 3867 | switch (howto->size) |
f8df10f4 | 3868 | { |
4a335f3d AM |
3869 | case 0: |
3870 | addend = bfd_get_8 (input_bfd, where); | |
3871 | if (howto->pc_relative) | |
3872 | { | |
3873 | addend = (addend ^ 0x80) - 0x80; | |
3874 | addend += 1; | |
3875 | } | |
3876 | break; | |
3877 | case 1: | |
3878 | addend = bfd_get_16 (input_bfd, where); | |
3879 | if (howto->pc_relative) | |
3880 | { | |
3881 | addend = (addend ^ 0x8000) - 0x8000; | |
3882 | addend += 2; | |
3883 | } | |
3884 | break; | |
3885 | case 2: | |
3886 | addend = bfd_get_32 (input_bfd, where); | |
3887 | if (howto->pc_relative) | |
3888 | { | |
3889 | addend = (addend ^ 0x80000000) - 0x80000000; | |
3890 | addend += 4; | |
3891 | } | |
3892 | break; | |
3893 | default: | |
3894 | abort (); | |
f8df10f4 JJ |
3895 | } |
3896 | ||
0e1862bb | 3897 | if (bfd_link_relocatable (info)) |
ab96bf03 AM |
3898 | addend += sec->output_offset; |
3899 | else | |
3900 | { | |
3901 | asection *msec = sec; | |
3902 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, | |
3903 | addend); | |
3904 | addend -= relocation; | |
3905 | addend += msec->output_section->vma + msec->output_offset; | |
3906 | } | |
4a335f3d AM |
3907 | |
3908 | switch (howto->size) | |
3909 | { | |
3910 | case 0: | |
16a10388 | 3911 | /* FIXME: overflow checks. */ |
4a335f3d AM |
3912 | if (howto->pc_relative) |
3913 | addend -= 1; | |
3914 | bfd_put_8 (input_bfd, addend, where); | |
4a335f3d AM |
3915 | break; |
3916 | case 1: | |
3917 | if (howto->pc_relative) | |
3918 | addend -= 2; | |
3919 | bfd_put_16 (input_bfd, addend, where); | |
4a335f3d AM |
3920 | break; |
3921 | case 2: | |
3922 | if (howto->pc_relative) | |
3923 | addend -= 4; | |
3924 | bfd_put_32 (input_bfd, addend, where); | |
3925 | break; | |
3926 | } | |
f8df10f4 | 3927 | } |
0e1862bb | 3928 | else if (!bfd_link_relocatable (info) |
1f85278f | 3929 | && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc L |
3930 | { |
3931 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
9fff0c39 L |
3932 | h = elf_i386_get_local_sym_hash (htab, input_bfd, rel, |
3933 | FALSE); | |
c25bc9fc L |
3934 | if (h == NULL) |
3935 | abort (); | |
3936 | ||
23209a78 | 3937 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
3938 | h->root.u.def.value = sym->st_value; |
3939 | h->root.u.def.section = sec; | |
3940 | } | |
252b5132 RH |
3941 | } |
3942 | else | |
3943 | { | |
3d540e93 | 3944 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 3945 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
ffb2e45b | 3946 | |
b2a8e766 AM |
3947 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3948 | r_symndx, symtab_hdr, sym_hashes, | |
3949 | h, sec, relocation, | |
62d887d4 | 3950 | unresolved_reloc, warned, ignored); |
1788fc08 | 3951 | st_size = h->size; |
252b5132 RH |
3952 | } |
3953 | ||
dbaa2011 | 3954 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
3955 | { |
3956 | _bfd_clear_contents (howto, input_bfd, input_section, | |
3957 | contents + rel->r_offset); | |
3958 | wrel->r_offset = rel->r_offset; | |
3959 | wrel->r_info = 0; | |
3960 | wrel->r_addend = 0; | |
3961 | ||
3962 | /* For ld -r, remove relocations in debug sections against | |
3963 | sections defined in discarded sections. Not done for | |
3964 | eh_frame editing code expects to be present. */ | |
3965 | if (bfd_link_relocatable (info) | |
3966 | && (input_section->flags & SEC_DEBUGGING)) | |
3967 | wrel--; | |
3968 | ||
3969 | continue; | |
3970 | } | |
9635fe29 | 3971 | |
0e1862bb | 3972 | if (bfd_link_relocatable (info)) |
2d5da473 L |
3973 | { |
3974 | if (wrel != rel) | |
3975 | *wrel = *rel; | |
3976 | continue; | |
3977 | } | |
ab96bf03 | 3978 | |
cbe950e9 L |
3979 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3980 | it here if it is defined in a non-shared object. */ | |
3981 | if (h != NULL | |
3982 | && h->type == STT_GNU_IFUNC | |
3983 | && h->def_regular) | |
3984 | { | |
3985 | asection *plt, *gotplt, *base_got; | |
3986 | bfd_vma plt_index; | |
4c544807 | 3987 | const char *name; |
cbe950e9 | 3988 | |
97dc35c8 L |
3989 | if ((input_section->flags & SEC_ALLOC) == 0) |
3990 | { | |
3991 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
3992 | sections because such sections are not SEC_ALLOC and | |
3993 | thus ld.so will not process them. */ | |
3994 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 3995 | continue; |
97dc35c8 L |
3996 | abort (); |
3997 | } | |
cbe950e9 L |
3998 | |
3999 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 4000 | if (htab->elf.splt != NULL) |
cbe950e9 | 4001 | { |
6de2ae4a L |
4002 | plt = htab->elf.splt; |
4003 | gotplt = htab->elf.sgotplt; | |
cbe950e9 L |
4004 | } |
4005 | else | |
4006 | { | |
6de2ae4a L |
4007 | plt = htab->elf.iplt; |
4008 | gotplt = htab->elf.igotplt; | |
cbe950e9 L |
4009 | } |
4010 | ||
cbe950e9 L |
4011 | switch (r_type) |
4012 | { | |
4013 | default: | |
233cc9c1 | 4014 | break; |
cbe950e9 L |
4015 | |
4016 | case R_386_GOT32: | |
02a86693 | 4017 | case R_386_GOT32X: |
6de2ae4a | 4018 | base_got = htab->elf.sgot; |
cbe950e9 L |
4019 | off = h->got.offset; |
4020 | ||
7afd84dc | 4021 | if (base_got == NULL) |
cbe950e9 L |
4022 | abort (); |
4023 | ||
7afd84dc | 4024 | if (off == (bfd_vma) -1) |
cbe950e9 | 4025 | { |
7afd84dc L |
4026 | /* We can't use h->got.offset here to save state, or |
4027 | even just remember the offset, as finish_dynamic_symbol | |
4028 | would use that as offset into .got. */ | |
6bbec505 | 4029 | |
233cc9c1 L |
4030 | if (h->plt.offset == (bfd_vma) -1) |
4031 | abort (); | |
4032 | ||
6de2ae4a | 4033 | if (htab->elf.splt != NULL) |
7afd84dc | 4034 | { |
25e762b9 | 4035 | plt_index = h->plt.offset / plt_entry_size - 1; |
7afd84dc | 4036 | off = (plt_index + 3) * 4; |
6de2ae4a | 4037 | base_got = htab->elf.sgotplt; |
7afd84dc | 4038 | } |
cbe950e9 L |
4039 | else |
4040 | { | |
25e762b9 | 4041 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 4042 | off = plt_index * 4; |
6de2ae4a | 4043 | base_got = htab->elf.igotplt; |
7afd84dc L |
4044 | } |
4045 | ||
4046 | if (h->dynindx == -1 | |
4047 | || h->forced_local | |
4048 | || info->symbolic) | |
4049 | { | |
4050 | /* This references the local defitionion. We must | |
4051 | initialize this entry in the global offset table. | |
4052 | Since the offset must always be a multiple of 8, | |
4053 | we use the least significant bit to record | |
4054 | whether we have initialized it already. | |
4055 | ||
4056 | When doing a dynamic link, we create a .rela.got | |
4057 | relocation entry to initialize the value. This | |
4058 | is done in the finish_dynamic_symbol routine. */ | |
4059 | if ((off & 1) != 0) | |
4060 | off &= ~1; | |
4061 | else | |
4062 | { | |
4063 | bfd_put_32 (output_bfd, relocation, | |
4064 | base_got->contents + off); | |
4065 | h->got.offset |= 1; | |
4066 | } | |
cbe950e9 | 4067 | } |
cbe950e9 | 4068 | |
7afd84dc | 4069 | relocation = off; |
7afd84dc L |
4070 | } |
4071 | else | |
ca8c86ef L |
4072 | relocation = (base_got->output_section->vma |
4073 | + base_got->output_offset + off | |
4074 | - gotplt->output_section->vma | |
4075 | - gotplt->output_offset); | |
4076 | ||
712ec279 L |
4077 | if ((*(contents + rel->r_offset - 1) & 0xc7) == 0x5) |
4078 | { | |
4079 | if (bfd_link_pic (info)) | |
4080 | goto disallow_got32; | |
4081 | ||
4082 | /* Add the GOT base if there is no base register. */ | |
4083 | relocation += (gotplt->output_section->vma | |
4084 | + gotplt->output_offset); | |
4085 | } | |
4086 | else if (htab->elf.splt == NULL) | |
4087 | { | |
4088 | /* Adjust for static executables. */ | |
4089 | relocation += gotplt->output_offset; | |
4090 | } | |
0018b0a3 | 4091 | |
cbe950e9 | 4092 | goto do_relocation; |
233cc9c1 L |
4093 | } |
4094 | ||
4095 | if (h->plt.offset == (bfd_vma) -1) | |
4096 | { | |
4097 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
4098 | if (r_type == R_386_32 | |
4099 | && (input_section->flags & SEC_CODE) == 0) | |
4100 | goto do_ifunc_pointer; | |
4101 | goto bad_ifunc_reloc; | |
4102 | } | |
4103 | ||
4104 | relocation = (plt->output_section->vma | |
4105 | + plt->output_offset + h->plt.offset); | |
4106 | ||
4107 | switch (r_type) | |
4108 | { | |
4109 | default: | |
4110 | bad_ifunc_reloc: | |
4111 | if (h->root.root.string) | |
4112 | name = h->root.root.string; | |
4113 | else | |
4114 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
4115 | NULL); | |
4eca0228 | 4116 | _bfd_error_handler |
695344c0 | 4117 | /* xgettext:c-format */ |
233cc9c1 L |
4118 | (_("%B: relocation %s against STT_GNU_IFUNC " |
4119 | "symbol `%s' isn't supported"), input_bfd, | |
4120 | howto->name, name); | |
4121 | bfd_set_error (bfd_error_bad_value); | |
4122 | return FALSE; | |
4123 | ||
4124 | case R_386_32: | |
4125 | /* Generate dynamic relcoation only when there is a | |
4126 | non-GOT reference in a shared object. */ | |
4127 | if ((bfd_link_pic (info) && h->non_got_ref) | |
4128 | || h->plt.offset == (bfd_vma) -1) | |
4129 | { | |
4130 | Elf_Internal_Rela outrel; | |
4131 | asection *sreloc; | |
4132 | bfd_vma offset; | |
4133 | ||
4134 | do_ifunc_pointer: | |
4135 | /* Need a dynamic relocation to get the real function | |
4136 | adddress. */ | |
4137 | offset = _bfd_elf_section_offset (output_bfd, | |
4138 | info, | |
4139 | input_section, | |
4140 | rel->r_offset); | |
4141 | if (offset == (bfd_vma) -1 | |
4142 | || offset == (bfd_vma) -2) | |
4143 | abort (); | |
4144 | ||
4145 | outrel.r_offset = (input_section->output_section->vma | |
4146 | + input_section->output_offset | |
4147 | + offset); | |
4148 | ||
4149 | if (h->dynindx == -1 | |
4150 | || h->forced_local | |
4151 | || bfd_link_executable (info)) | |
4152 | { | |
4153 | /* This symbol is resolved locally. */ | |
4154 | outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
4155 | bfd_put_32 (output_bfd, | |
4156 | (h->root.u.def.value | |
4157 | + h->root.u.def.section->output_section->vma | |
4158 | + h->root.u.def.section->output_offset), | |
4159 | contents + offset); | |
4160 | } | |
4161 | else | |
4162 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
4163 | ||
4164 | /* Dynamic relocations are stored in | |
4165 | 1. .rel.ifunc section in PIC object. | |
4166 | 2. .rel.got section in dynamic executable. | |
4167 | 3. .rel.iplt section in static executable. */ | |
4168 | if (bfd_link_pic (info)) | |
4169 | sreloc = htab->elf.irelifunc; | |
4170 | else if (htab->elf.splt != NULL) | |
4171 | sreloc = htab->elf.srelgot; | |
4172 | else | |
4173 | sreloc = htab->elf.irelplt; | |
4174 | elf_append_rel (output_bfd, sreloc, &outrel); | |
4175 | ||
4176 | /* If this reloc is against an external symbol, we | |
4177 | do not want to fiddle with the addend. Otherwise, | |
4178 | we need to include the symbol value so that it | |
4179 | becomes an addend for the dynamic reloc. For an | |
4180 | internal symbol, we have updated addend. */ | |
4181 | continue; | |
4182 | } | |
4183 | /* FALLTHROUGH */ | |
4184 | case R_386_PC32: | |
4185 | case R_386_PLT32: | |
4186 | goto do_relocation; | |
cbe950e9 L |
4187 | |
4188 | case R_386_GOTOFF: | |
4189 | relocation -= (gotplt->output_section->vma | |
4190 | + gotplt->output_offset); | |
4191 | goto do_relocation; | |
4192 | } | |
4193 | } | |
4194 | ||
04ebc307 | 4195 | eh = (struct elf_i386_link_hash_entry *) h; |
aec6b87e | 4196 | resolved_to_zero = (eh != NULL |
e62b9723 L |
4197 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
4198 | eh->has_got_reloc, | |
4199 | eh)); | |
aec6b87e | 4200 | |
252b5132 RH |
4201 | switch (r_type) |
4202 | { | |
02a86693 L |
4203 | case R_386_GOT32X: |
4204 | /* Avoid optimizing _DYNAMIC since ld.so may use its | |
4205 | link-time address. */ | |
4206 | if (h == htab->elf.hdynamic) | |
4207 | goto r_386_got32; | |
4208 | ||
4209 | if (bfd_link_pic (info)) | |
4210 | { | |
4211 | /* It is OK to convert mov to lea and convert indirect | |
4212 | branch to direct branch. It is OK to convert adc, | |
4213 | add, and, cmp, or, sbb, sub, test, xor only when PIC | |
4214 | is false. */ | |
02e2aef8 L |
4215 | unsigned int opcode, addend; |
4216 | addend = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
4217 | if (addend != 0) | |
4218 | goto r_386_got32; | |
4219 | opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
02a86693 L |
4220 | if (opcode != 0x8b && opcode != 0xff) |
4221 | goto r_386_got32; | |
4222 | } | |
4223 | ||
4224 | /* Resolve "mov GOT[(%reg)], %reg", | |
4225 | "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]" | |
4226 | and "binop foo@GOT[(%reg)], %reg". */ | |
4227 | if (h == NULL | |
4228 | || (h->plt.offset == (bfd_vma) -1 | |
4229 | && h->got.offset == (bfd_vma) -1) | |
4230 | || htab->elf.sgotplt == NULL) | |
4231 | abort (); | |
4232 | ||
4233 | offplt = (htab->elf.sgotplt->output_section->vma | |
4234 | + htab->elf.sgotplt->output_offset); | |
4235 | ||
4236 | /* It is relative to .got.plt section. */ | |
4237 | if (h->got.offset != (bfd_vma) -1) | |
32875eb1 L |
4238 | /* Use GOT entry. Mask off the least significant bit in |
4239 | GOT offset which may be set by R_386_GOT32 processing | |
4240 | below. */ | |
02a86693 L |
4241 | relocation = (htab->elf.sgot->output_section->vma |
4242 | + htab->elf.sgot->output_offset | |
32875eb1 | 4243 | + (h->got.offset & ~1) - offplt); |
02a86693 L |
4244 | else |
4245 | /* Use GOTPLT entry. */ | |
4246 | relocation = (h->plt.offset / plt_entry_size - 1 + 3) * 4; | |
4247 | ||
4248 | if (!bfd_link_pic (info)) | |
4249 | { | |
4250 | /* If not PIC, add the .got.plt section address for | |
a3718e9e | 4251 | baseless addressing. */ |
02a86693 | 4252 | unsigned int modrm; |
02e2aef8 | 4253 | modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
02a86693 L |
4254 | if ((modrm & 0xc7) == 0x5) |
4255 | relocation += offplt; | |
4256 | } | |
4257 | ||
4258 | unresolved_reloc = FALSE; | |
4259 | break; | |
4260 | ||
252b5132 | 4261 | case R_386_GOT32: |
02a86693 | 4262 | r_386_got32: |
252b5132 RH |
4263 | /* Relocation is to the entry for this symbol in the global |
4264 | offset table. */ | |
6de2ae4a | 4265 | if (htab->elf.sgot == NULL) |
ffb2e45b | 4266 | abort (); |
252b5132 RH |
4267 | |
4268 | if (h != NULL) | |
4269 | { | |
b34976b6 | 4270 | bfd_boolean dyn; |
252b5132 RH |
4271 | |
4272 | off = h->got.offset; | |
ebe50bae | 4273 | dyn = htab->elf.dynamic_sections_created; |
0e1862bb L |
4274 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
4275 | bfd_link_pic (info), | |
4276 | h) | |
4277 | || (bfd_link_pic (info) | |
586119b3 | 4278 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
ef5aade5 L |
4279 | || (ELF_ST_VISIBILITY (h->other) |
4280 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
4281 | { |
4282 | /* This is actually a static link, or it is a | |
4283 | -Bsymbolic link and the symbol is defined | |
4284 | locally, or the symbol was forced to be local | |
4285 | because of a version file. We must initialize | |
4286 | this entry in the global offset table. Since the | |
4287 | offset must always be a multiple of 4, we use the | |
4288 | least significant bit to record whether we have | |
4289 | initialized it already. | |
4290 | ||
4291 | When doing a dynamic link, we create a .rel.got | |
4292 | relocation entry to initialize the value. This | |
4293 | is done in the finish_dynamic_symbol routine. */ | |
4294 | if ((off & 1) != 0) | |
4295 | off &= ~1; | |
4296 | else | |
4297 | { | |
4298 | bfd_put_32 (output_bfd, relocation, | |
6de2ae4a | 4299 | htab->elf.sgot->contents + off); |
252b5132 RH |
4300 | h->got.offset |= 1; |
4301 | } | |
4302 | } | |
8c694914 | 4303 | else |
b34976b6 | 4304 | unresolved_reloc = FALSE; |
252b5132 RH |
4305 | } |
4306 | else | |
4307 | { | |
ffb2e45b AM |
4308 | if (local_got_offsets == NULL) |
4309 | abort (); | |
252b5132 RH |
4310 | |
4311 | off = local_got_offsets[r_symndx]; | |
4312 | ||
4313 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
4314 | the least significant bit to record whether we have |
4315 | already generated the necessary reloc. */ | |
252b5132 RH |
4316 | if ((off & 1) != 0) |
4317 | off &= ~1; | |
4318 | else | |
4319 | { | |
6725bdbf | 4320 | bfd_put_32 (output_bfd, relocation, |
6de2ae4a | 4321 | htab->elf.sgot->contents + off); |
252b5132 | 4322 | |
0e1862bb | 4323 | if (bfd_link_pic (info)) |
252b5132 | 4324 | { |
947216bf AM |
4325 | asection *s; |
4326 | Elf_Internal_Rela outrel; | |
252b5132 | 4327 | |
6de2ae4a | 4328 | s = htab->elf.srelgot; |
947216bf | 4329 | if (s == NULL) |
ffb2e45b | 4330 | abort (); |
252b5132 | 4331 | |
6de2ae4a L |
4332 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4333 | + htab->elf.sgot->output_offset | |
252b5132 RH |
4334 | + off); |
4335 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
59d6ffb2 | 4336 | elf_append_rel (output_bfd, s, &outrel); |
252b5132 RH |
4337 | } |
4338 | ||
4339 | local_got_offsets[r_symndx] |= 1; | |
4340 | } | |
252b5132 RH |
4341 | } |
4342 | ||
ffb2e45b AM |
4343 | if (off >= (bfd_vma) -2) |
4344 | abort (); | |
4345 | ||
74d7f0aa L |
4346 | relocation = (htab->elf.sgot->output_section->vma |
4347 | + htab->elf.sgot->output_offset + off); | |
4348 | if ((*(contents + rel->r_offset - 1) & 0xc7) == 0x5) | |
4349 | { | |
4350 | if (bfd_link_pic (info)) | |
4351 | { | |
4352 | /* For PIC, disallow R_386_GOT32 without a base | |
4353 | register since we don't know what the GOT base | |
4354 | is. */ | |
4355 | const char *name; | |
4356 | ||
712ec279 | 4357 | disallow_got32: |
74d7f0aa L |
4358 | if (h == NULL) |
4359 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
4360 | NULL); | |
4361 | else | |
4362 | name = h->root.root.string; | |
4363 | ||
4eca0228 | 4364 | _bfd_error_handler |
695344c0 | 4365 | /* xgettext:c-format */ |
712ec279 L |
4366 | (_("%B: direct GOT relocation %s against `%s' without base register can not be used when making a shared object"), |
4367 | input_bfd, howto->name, name); | |
74d7f0aa L |
4368 | bfd_set_error (bfd_error_bad_value); |
4369 | return FALSE; | |
4370 | } | |
4371 | } | |
4372 | else | |
4373 | { | |
4374 | /* Subtract the .got.plt section address only with a base | |
4375 | register. */ | |
4376 | relocation -= (htab->elf.sgotplt->output_section->vma | |
4377 | + htab->elf.sgotplt->output_offset); | |
4378 | } | |
4379 | ||
252b5132 RH |
4380 | break; |
4381 | ||
4382 | case R_386_GOTOFF: | |
4383 | /* Relocation is relative to the start of the global offset | |
4384 | table. */ | |
4385 | ||
3d949995 L |
4386 | /* Check to make sure it isn't a protected function or data |
4387 | symbol for shared library since it may not be local when | |
4388 | used as function address or with copy relocation. We also | |
e3c0e327 | 4389 | need to make sure that a symbol is referenced locally. */ |
0e1862bb | 4390 | if (!bfd_link_executable (info) && h) |
90f487df | 4391 | { |
41bed6dd L |
4392 | if (!h->def_regular) |
4393 | { | |
4394 | const char *v; | |
4395 | ||
4396 | switch (ELF_ST_VISIBILITY (h->other)) | |
4397 | { | |
4398 | case STV_HIDDEN: | |
4399 | v = _("hidden symbol"); | |
4400 | break; | |
4401 | case STV_INTERNAL: | |
4402 | v = _("internal symbol"); | |
4403 | break; | |
4404 | case STV_PROTECTED: | |
4405 | v = _("protected symbol"); | |
4406 | break; | |
4407 | default: | |
4408 | v = _("symbol"); | |
4409 | break; | |
4410 | } | |
4411 | ||
4eca0228 | 4412 | _bfd_error_handler |
695344c0 | 4413 | /* xgettext:c-format */ |
41bed6dd L |
4414 | (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"), |
4415 | input_bfd, v, h->root.root.string); | |
4416 | bfd_set_error (bfd_error_bad_value); | |
4417 | return FALSE; | |
4418 | } | |
d5597ebc | 4419 | else if (!SYMBOL_REFERENCES_LOCAL (info, h) |
3d949995 L |
4420 | && (h->type == STT_FUNC |
4421 | || h->type == STT_OBJECT) | |
41bed6dd L |
4422 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) |
4423 | { | |
4eca0228 | 4424 | _bfd_error_handler |
695344c0 | 4425 | /* xgettext:c-format */ |
3d949995 L |
4426 | (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"), |
4427 | input_bfd, | |
4428 | h->type == STT_FUNC ? "function" : "data", | |
4429 | h->root.root.string); | |
41bed6dd L |
4430 | bfd_set_error (bfd_error_bad_value); |
4431 | return FALSE; | |
4432 | } | |
90f487df L |
4433 | } |
4434 | ||
8c37241b JJ |
4435 | /* Note that sgot is not involved in this |
4436 | calculation. We always want the start of .got.plt. If we | |
4437 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
252b5132 RH |
4438 | permitted by the ABI, we might have to change this |
4439 | calculation. */ | |
6de2ae4a L |
4440 | relocation -= htab->elf.sgotplt->output_section->vma |
4441 | + htab->elf.sgotplt->output_offset; | |
252b5132 RH |
4442 | break; |
4443 | ||
4444 | case R_386_GOTPC: | |
4445 | /* Use global offset table as symbol value. */ | |
6de2ae4a L |
4446 | relocation = htab->elf.sgotplt->output_section->vma |
4447 | + htab->elf.sgotplt->output_offset; | |
b34976b6 | 4448 | unresolved_reloc = FALSE; |
252b5132 RH |
4449 | break; |
4450 | ||
4451 | case R_386_PLT32: | |
4452 | /* Relocation is to the entry for this symbol in the | |
4453 | procedure linkage table. */ | |
4454 | ||
dd5724d5 | 4455 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 4456 | without using the procedure linkage table. */ |
252b5132 RH |
4457 | if (h == NULL) |
4458 | break; | |
4459 | ||
dd7e64d4 L |
4460 | if ((h->plt.offset == (bfd_vma) -1 |
4461 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 4462 | || htab->elf.splt == NULL) |
252b5132 RH |
4463 | { |
4464 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
4465 | happens when statically linking PIC code, or when |
4466 | using -Bsymbolic. */ | |
252b5132 RH |
4467 | break; |
4468 | } | |
4469 | ||
dd7e64d4 L |
4470 | if (h->plt.offset != (bfd_vma) -1) |
4471 | { | |
4472 | resolved_plt = htab->elf.splt; | |
4473 | plt_offset = h->plt.offset; | |
4474 | } | |
4475 | else | |
4476 | { | |
4477 | resolved_plt = htab->plt_got; | |
4478 | plt_offset = eh->plt_got.offset; | |
4479 | } | |
4480 | ||
4481 | relocation = (resolved_plt->output_section->vma | |
4482 | + resolved_plt->output_offset | |
4483 | + plt_offset); | |
b34976b6 | 4484 | unresolved_reloc = FALSE; |
252b5132 RH |
4485 | break; |
4486 | ||
1788fc08 | 4487 | case R_386_SIZE32: |
1788fc08 L |
4488 | /* Set to symbol size. */ |
4489 | relocation = st_size; | |
4490 | /* Fall through. */ | |
4491 | ||
252b5132 RH |
4492 | case R_386_32: |
4493 | case R_386_PC32: | |
3348747a NS |
4494 | if ((input_section->flags & SEC_ALLOC) == 0 |
4495 | || is_vxworks_tls) | |
ec338859 AM |
4496 | break; |
4497 | ||
aec6b87e L |
4498 | /* Copy dynamic function pointer relocations. Don't generate |
4499 | dynamic relocations against resolved undefined weak symbols | |
4500 | in PIE, except for R_386_PC32. */ | |
0e1862bb | 4501 | if ((bfd_link_pic (info) |
ef5aade5 | 4502 | && (h == NULL |
aec6b87e L |
4503 | || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
4504 | && (!resolved_to_zero | |
4505 | || r_type == R_386_PC32)) | |
4506 | || h->root.type != bfd_link_hash_undefweak)) | |
1788fc08 | 4507 | && ((r_type != R_386_PC32 && r_type != R_386_SIZE32) |
f6c52c13 | 4508 | || !SYMBOL_CALLS_LOCAL (info, h))) |
a23b6845 | 4509 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 4510 | && !bfd_link_pic (info) |
12d0ee4a AM |
4511 | && h != NULL |
4512 | && h->dynindx != -1 | |
aec6b87e L |
4513 | && (!h->non_got_ref |
4514 | || eh->func_pointer_refcount > 0 | |
4515 | || (h->root.type == bfd_link_hash_undefweak | |
4516 | && !resolved_to_zero)) | |
bae420ef L |
4517 | && ((h->def_dynamic && !h->def_regular) |
4518 | /* Undefined weak symbol is bound locally when | |
4519 | PIC is false. */ | |
4520 | || h->root.type == bfd_link_hash_undefweak))) | |
252b5132 | 4521 | { |
947216bf | 4522 | Elf_Internal_Rela outrel; |
b34976b6 | 4523 | bfd_boolean skip, relocate; |
0c715baa | 4524 | asection *sreloc; |
252b5132 RH |
4525 | |
4526 | /* When generating a shared object, these relocations | |
4527 | are copied into the output file to be resolved at run | |
4528 | time. */ | |
4529 | ||
b34976b6 AM |
4530 | skip = FALSE; |
4531 | relocate = FALSE; | |
252b5132 | 4532 | |
c629eae0 JJ |
4533 | outrel.r_offset = |
4534 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
4535 | rel->r_offset); | |
4536 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 4537 | skip = TRUE; |
0bb2d96a | 4538 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 4539 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
4540 | outrel.r_offset += (input_section->output_section->vma |
4541 | + input_section->output_offset); | |
4542 | ||
4543 | if (skip) | |
0bb2d96a | 4544 | memset (&outrel, 0, sizeof outrel); |
5a15f56f AM |
4545 | else if (h != NULL |
4546 | && h->dynindx != -1 | |
4547 | && (r_type == R_386_PC32 | |
4e0c91e4 L |
4548 | || !(bfd_link_executable (info) |
4549 | || SYMBOLIC_BIND (info, h)) | |
f5385ebf | 4550 | || !h->def_regular)) |
0bb2d96a | 4551 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
4552 | else |
4553 | { | |
5a15f56f | 4554 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 4555 | relocate = TRUE; |
5a15f56f | 4556 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
252b5132 RH |
4557 | } |
4558 | ||
cbe950e9 | 4559 | sreloc = elf_section_data (input_section)->sreloc; |
e7c33416 | 4560 | |
62d78908 L |
4561 | if (sreloc == NULL || sreloc->contents == NULL) |
4562 | { | |
4563 | r = bfd_reloc_notsupported; | |
4564 | goto check_relocation_error; | |
4565 | } | |
0c715baa | 4566 | |
59d6ffb2 | 4567 | elf_append_rel (output_bfd, sreloc, &outrel); |
252b5132 RH |
4568 | |
4569 | /* If this reloc is against an external symbol, we do | |
4570 | not want to fiddle with the addend. Otherwise, we | |
4571 | need to include the symbol value so that it becomes | |
4572 | an addend for the dynamic reloc. */ | |
0f88be7a | 4573 | if (! relocate) |
252b5132 RH |
4574 | continue; |
4575 | } | |
252b5132 RH |
4576 | break; |
4577 | ||
37e55690 | 4578 | case R_386_TLS_IE: |
0e1862bb | 4579 | if (!bfd_link_executable (info)) |
37e55690 | 4580 | { |
947216bf | 4581 | Elf_Internal_Rela outrel; |
37e55690 | 4582 | asection *sreloc; |
37e55690 JJ |
4583 | |
4584 | outrel.r_offset = rel->r_offset | |
4585 | + input_section->output_section->vma | |
4586 | + input_section->output_offset; | |
4587 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
4588 | sreloc = elf_section_data (input_section)->sreloc; | |
4589 | if (sreloc == NULL) | |
4590 | abort (); | |
59d6ffb2 | 4591 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
4592 | } |
4593 | /* Fall through */ | |
4594 | ||
13ae64f3 | 4595 | case R_386_TLS_GD: |
67a4f2b7 AO |
4596 | case R_386_TLS_GOTDESC: |
4597 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 4598 | case R_386_TLS_IE_32: |
37e55690 | 4599 | case R_386_TLS_GOTIE: |
13ae64f3 JJ |
4600 | tls_type = GOT_UNKNOWN; |
4601 | if (h == NULL && local_got_offsets) | |
4602 | tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx]; | |
4603 | else if (h != NULL) | |
142411ca | 4604 | tls_type = elf_i386_hash_entry(h)->tls_type; |
37e55690 JJ |
4605 | if (tls_type == GOT_TLS_IE) |
4606 | tls_type = GOT_TLS_IE_NEG; | |
142411ca L |
4607 | |
4608 | if (! elf_i386_tls_transition (info, input_bfd, | |
4609 | input_section, contents, | |
4610 | symtab_hdr, sym_hashes, | |
4611 | &r_type, tls_type, rel, | |
bedfd056 | 4612 | relend, h, r_symndx, TRUE)) |
142411ca | 4613 | return FALSE; |
13ae64f3 JJ |
4614 | |
4615 | if (r_type == R_386_TLS_LE_32) | |
4616 | { | |
82e51918 | 4617 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 JJ |
4618 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
4619 | { | |
142411ca | 4620 | unsigned int type; |
13ae64f3 JJ |
4621 | bfd_vma roff; |
4622 | ||
4623 | /* GD->LE transition. */ | |
6eaa7fb5 | 4624 | type = *(contents + rel->r_offset - 2); |
13ae64f3 JJ |
4625 | if (type == 0x04) |
4626 | { | |
6eaa7fb5 L |
4627 | /* Change |
4628 | leal foo@tlsgd(,%ebx,1), %eax | |
4629 | call ___tls_get_addr@PLT | |
4630 | into: | |
4631 | movl %gs:0, %eax | |
4632 | subl $foo@tpoff, %eax | |
13ae64f3 | 4633 | (6 byte form of subl). */ |
142411ca | 4634 | roff = rel->r_offset + 5; |
13ae64f3 JJ |
4635 | } |
4636 | else | |
4637 | { | |
6eaa7fb5 L |
4638 | /* Change |
4639 | leal foo@tlsgd(%ebx), %eax | |
4640 | call ___tls_get_addr@PLT | |
4641 | nop | |
4642 | or | |
4643 | leal foo@tlsgd(%reg), %eax | |
4644 | call *___tls_get_addr@GOT(%reg) | |
4645 | which may be converted to | |
4646 | addr32 call ___tls_get_addr | |
4647 | into: | |
4648 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
142411ca | 4649 | (6 byte form of subl). */ |
142411ca | 4650 | roff = rel->r_offset + 6; |
13ae64f3 | 4651 | } |
6eaa7fb5 L |
4652 | memcpy (contents + roff - 8, |
4653 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
eb4ff4d6 | 4654 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
13ae64f3 | 4655 | contents + roff); |
6eaa7fb5 | 4656 | /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */ |
13ae64f3 | 4657 | rel++; |
60f2e42e | 4658 | wrel++; |
13ae64f3 JJ |
4659 | continue; |
4660 | } | |
67a4f2b7 AO |
4661 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
4662 | { | |
4663 | /* GDesc -> LE transition. | |
4664 | It's originally something like: | |
4665 | leal x@tlsdesc(%ebx), %eax | |
4666 | ||
4667 | leal x@ntpoff, %eax | |
4668 | ||
4669 | Registers other than %eax may be set up here. */ | |
4670 | ||
142411ca | 4671 | unsigned int val; |
67a4f2b7 AO |
4672 | bfd_vma roff; |
4673 | ||
67a4f2b7 | 4674 | roff = rel->r_offset; |
67a4f2b7 | 4675 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
4676 | |
4677 | /* Now modify the instruction as appropriate. */ | |
4678 | /* aoliva FIXME: remove the above and xor the byte | |
4679 | below with 0x86. */ | |
4680 | bfd_put_8 (output_bfd, val ^ 0x86, | |
4681 | contents + roff - 1); | |
eb4ff4d6 | 4682 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
67a4f2b7 AO |
4683 | contents + roff); |
4684 | continue; | |
4685 | } | |
4686 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
4687 | { | |
4688 | /* GDesc -> LE transition. | |
4689 | It's originally: | |
4690 | call *(%eax) | |
4691 | Turn it into: | |
142411ca | 4692 | xchg %ax,%ax */ |
67a4f2b7 | 4693 | |
67a4f2b7 | 4694 | bfd_vma roff; |
6bbec505 | 4695 | |
67a4f2b7 | 4696 | roff = rel->r_offset; |
10efb593 | 4697 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
4698 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4699 | continue; | |
4700 | } | |
37e55690 | 4701 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE) |
13ae64f3 | 4702 | { |
142411ca | 4703 | unsigned int val; |
13ae64f3 JJ |
4704 | |
4705 | /* IE->LE transition: | |
37e55690 JJ |
4706 | Originally it can be one of: |
4707 | movl foo, %eax | |
4708 | movl foo, %reg | |
4709 | addl foo, %reg | |
4710 | We change it into: | |
4711 | movl $foo, %eax | |
4712 | movl $foo, %reg | |
4713 | addl $foo, %reg. */ | |
37e55690 | 4714 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
37e55690 JJ |
4715 | if (val == 0xa1) |
4716 | { | |
4717 | /* movl foo, %eax. */ | |
55fd94b0 AM |
4718 | bfd_put_8 (output_bfd, 0xb8, |
4719 | contents + rel->r_offset - 1); | |
37e55690 | 4720 | } |
299bf759 | 4721 | else |
37e55690 | 4722 | { |
142411ca L |
4723 | unsigned int type; |
4724 | ||
55fd94b0 AM |
4725 | type = bfd_get_8 (input_bfd, |
4726 | contents + rel->r_offset - 2); | |
299bf759 | 4727 | switch (type) |
26e41594 | 4728 | { |
299bf759 L |
4729 | case 0x8b: |
4730 | /* movl */ | |
299bf759 L |
4731 | bfd_put_8 (output_bfd, 0xc7, |
4732 | contents + rel->r_offset - 2); | |
4733 | bfd_put_8 (output_bfd, | |
4734 | 0xc0 | ((val >> 3) & 7), | |
4735 | contents + rel->r_offset - 1); | |
4736 | break; | |
4737 | case 0x03: | |
4738 | /* addl */ | |
299bf759 L |
4739 | bfd_put_8 (output_bfd, 0x81, |
4740 | contents + rel->r_offset - 2); | |
4741 | bfd_put_8 (output_bfd, | |
4742 | 0xc0 | ((val >> 3) & 7), | |
4743 | contents + rel->r_offset - 1); | |
4744 | break; | |
4745 | default: | |
4746 | BFD_FAIL (); | |
4747 | break; | |
26e41594 | 4748 | } |
37e55690 | 4749 | } |
eb4ff4d6 | 4750 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
4751 | contents + rel->r_offset); |
4752 | continue; | |
4753 | } | |
4754 | else | |
4755 | { | |
4756 | unsigned int val, type; | |
4757 | ||
4758 | /* {IE_32,GOTIE}->LE transition: | |
4759 | Originally it can be one of: | |
13ae64f3 | 4760 | subl foo(%reg1), %reg2 |
13ae64f3 | 4761 | movl foo(%reg1), %reg2 |
37e55690 | 4762 | addl foo(%reg1), %reg2 |
13ae64f3 JJ |
4763 | We change it into: |
4764 | subl $foo, %reg2 | |
37e55690 JJ |
4765 | movl $foo, %reg2 (6 byte form) |
4766 | addl $foo, %reg2. */ | |
13ae64f3 JJ |
4767 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
4768 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
13ae64f3 JJ |
4769 | if (type == 0x8b) |
4770 | { | |
4771 | /* movl */ | |
13ae64f3 JJ |
4772 | bfd_put_8 (output_bfd, 0xc7, |
4773 | contents + rel->r_offset - 2); | |
4774 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4775 | contents + rel->r_offset - 1); | |
4776 | } | |
4777 | else if (type == 0x2b) | |
4778 | { | |
4779 | /* subl */ | |
13ae64f3 JJ |
4780 | bfd_put_8 (output_bfd, 0x81, |
4781 | contents + rel->r_offset - 2); | |
4782 | bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7), | |
4783 | contents + rel->r_offset - 1); | |
4784 | } | |
37e55690 JJ |
4785 | else if (type == 0x03) |
4786 | { | |
4787 | /* addl */ | |
4788 | bfd_put_8 (output_bfd, 0x81, | |
4789 | contents + rel->r_offset - 2); | |
4790 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4791 | contents + rel->r_offset - 1); | |
4792 | } | |
13ae64f3 JJ |
4793 | else |
4794 | BFD_FAIL (); | |
37e55690 | 4795 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE) |
eb4ff4d6 | 4796 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
4797 | contents + rel->r_offset); |
4798 | else | |
eb4ff4d6 | 4799 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
37e55690 | 4800 | contents + rel->r_offset); |
13ae64f3 JJ |
4801 | continue; |
4802 | } | |
4803 | } | |
4804 | ||
6de2ae4a | 4805 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
4806 | abort (); |
4807 | ||
4808 | if (h != NULL) | |
67a4f2b7 AO |
4809 | { |
4810 | off = h->got.offset; | |
4811 | offplt = elf_i386_hash_entry (h)->tlsdesc_got; | |
4812 | } | |
13ae64f3 JJ |
4813 | else |
4814 | { | |
4815 | if (local_got_offsets == NULL) | |
4816 | abort (); | |
4817 | ||
4818 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 4819 | offplt = local_tlsdesc_gotents[r_symndx]; |
13ae64f3 JJ |
4820 | } |
4821 | ||
4822 | if ((off & 1) != 0) | |
4823 | off &= ~1; | |
26e41594 | 4824 | else |
13ae64f3 | 4825 | { |
947216bf | 4826 | Elf_Internal_Rela outrel; |
91d6fa6a | 4827 | int dr_type; |
67a4f2b7 | 4828 | asection *sreloc; |
13ae64f3 | 4829 | |
6de2ae4a | 4830 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
4831 | abort (); |
4832 | ||
67a4f2b7 AO |
4833 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4834 | ||
4835 | if (GOT_TLS_GDESC_P (tls_type)) | |
4836 | { | |
59d6ffb2 | 4837 | bfd_byte *loc; |
67a4f2b7 AO |
4838 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC); |
4839 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8 | |
6de2ae4a L |
4840 | <= htab->elf.sgotplt->size); |
4841 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4842 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4843 | + offplt |
4844 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4845 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4846 | loc = sreloc->contents; |
5ae0bfb6 RS |
4847 | loc += (htab->next_tls_desc_index++ |
4848 | * sizeof (Elf32_External_Rel)); | |
67a4f2b7 | 4849 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
c3b02097 | 4850 | <= sreloc->contents + sreloc->size); |
67a4f2b7 AO |
4851 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
4852 | if (indx == 0) | |
4853 | { | |
4854 | BFD_ASSERT (! unresolved_reloc); | |
4855 | bfd_put_32 (output_bfd, | |
eb4ff4d6 | 4856 | relocation - elf_i386_dtpoff_base (info), |
6de2ae4a | 4857 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4858 | + htab->sgotplt_jump_table_size + 4); |
4859 | } | |
4860 | else | |
4861 | { | |
4862 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4863 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4864 | + htab->sgotplt_jump_table_size + 4); |
4865 | } | |
4866 | } | |
4867 | ||
6de2ae4a | 4868 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4869 | |
6de2ae4a L |
4870 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4871 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 | 4872 | |
67a4f2b7 | 4873 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 | 4874 | dr_type = R_386_TLS_DTPMOD32; |
67a4f2b7 AO |
4875 | else if (GOT_TLS_GDESC_P (tls_type)) |
4876 | goto dr_done; | |
37e55690 JJ |
4877 | else if (tls_type == GOT_TLS_IE_POS) |
4878 | dr_type = R_386_TLS_TPOFF; | |
13ae64f3 JJ |
4879 | else |
4880 | dr_type = R_386_TLS_TPOFF32; | |
67a4f2b7 | 4881 | |
37e55690 | 4882 | if (dr_type == R_386_TLS_TPOFF && indx == 0) |
eb4ff4d6 L |
4883 | bfd_put_32 (output_bfd, |
4884 | relocation - elf_i386_dtpoff_base (info), | |
6de2ae4a | 4885 | htab->elf.sgot->contents + off); |
37e55690 | 4886 | else if (dr_type == R_386_TLS_TPOFF32 && indx == 0) |
23209a78 | 4887 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 4888 | elf_i386_dtpoff_base (info) - relocation, |
6de2ae4a | 4889 | htab->elf.sgot->contents + off); |
67a4f2b7 | 4890 | else if (dr_type != R_386_TLS_DESC) |
c366c25e | 4891 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 4892 | htab->elf.sgot->contents + off); |
13ae64f3 | 4893 | outrel.r_info = ELF32_R_INFO (indx, dr_type); |
67a4f2b7 | 4894 | |
59d6ffb2 | 4895 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 | 4896 | |
67a4f2b7 | 4897 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 JJ |
4898 | { |
4899 | if (indx == 0) | |
4900 | { | |
82e51918 | 4901 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 | 4902 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 4903 | relocation - elf_i386_dtpoff_base (info), |
6de2ae4a | 4904 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4905 | } |
4906 | else | |
4907 | { | |
4908 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4909 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4910 | outrel.r_info = ELF32_R_INFO (indx, |
4911 | R_386_TLS_DTPOFF32); | |
4912 | outrel.r_offset += 4; | |
59d6ffb2 | 4913 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 JJ |
4914 | } |
4915 | } | |
37e55690 JJ |
4916 | else if (tls_type == GOT_TLS_IE_BOTH) |
4917 | { | |
4918 | bfd_put_32 (output_bfd, | |
eb4ff4d6 L |
4919 | (indx == 0 |
4920 | ? relocation - elf_i386_dtpoff_base (info) | |
4921 | : 0), | |
6de2ae4a | 4922 | htab->elf.sgot->contents + off + 4); |
37e55690 JJ |
4923 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); |
4924 | outrel.r_offset += 4; | |
59d6ffb2 | 4925 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 | 4926 | } |
13ae64f3 | 4927 | |
67a4f2b7 | 4928 | dr_done: |
13ae64f3 JJ |
4929 | if (h != NULL) |
4930 | h->got.offset |= 1; | |
4931 | else | |
4932 | local_got_offsets[r_symndx] |= 1; | |
4933 | } | |
4934 | ||
67a4f2b7 AO |
4935 | if (off >= (bfd_vma) -2 |
4936 | && ! GOT_TLS_GDESC_P (tls_type)) | |
13ae64f3 | 4937 | abort (); |
67a4f2b7 AO |
4938 | if (r_type == R_386_TLS_GOTDESC |
4939 | || r_type == R_386_TLS_DESC_CALL) | |
4940 | { | |
4941 | relocation = htab->sgotplt_jump_table_size + offplt; | |
4942 | unresolved_reloc = FALSE; | |
4943 | } | |
4944 | else if (r_type == ELF32_R_TYPE (rel->r_info)) | |
13ae64f3 | 4945 | { |
6de2ae4a L |
4946 | bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma |
4947 | + htab->elf.sgotplt->output_offset; | |
4948 | relocation = htab->elf.sgot->output_section->vma | |
4949 | + htab->elf.sgot->output_offset + off - g_o_t; | |
37e55690 JJ |
4950 | if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE) |
4951 | && tls_type == GOT_TLS_IE_BOTH) | |
4952 | relocation += 4; | |
4953 | if (r_type == R_386_TLS_IE) | |
8c37241b | 4954 | relocation += g_o_t; |
b34976b6 | 4955 | unresolved_reloc = FALSE; |
13ae64f3 | 4956 | } |
67a4f2b7 | 4957 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
13ae64f3 JJ |
4958 | { |
4959 | unsigned int val, type; | |
4960 | bfd_vma roff; | |
4961 | ||
4962 | /* GD->IE transition. */ | |
6eaa7fb5 L |
4963 | type = *(contents + rel->r_offset - 2); |
4964 | val = *(contents + rel->r_offset - 1); | |
13ae64f3 JJ |
4965 | if (type == 0x04) |
4966 | { | |
6eaa7fb5 L |
4967 | /* Change |
4968 | leal foo@tlsgd(,%ebx,1), %eax | |
4969 | call ___tls_get_addr@PLT | |
4970 | into: | |
4971 | movl %gs:0, %eax | |
4972 | subl $foo@gottpoff(%ebx), %eax. */ | |
13ae64f3 | 4973 | val >>= 3; |
142411ca | 4974 | roff = rel->r_offset - 3; |
13ae64f3 JJ |
4975 | } |
4976 | else | |
4977 | { | |
6eaa7fb5 L |
4978 | /* Change |
4979 | leal foo@tlsgd(%ebx), %eax | |
4980 | call ___tls_get_addr@PLT | |
4981 | nop | |
4982 | or | |
4983 | leal foo@tlsgd(%reg), %eax | |
4984 | call *___tls_get_addr@GOT(%reg) | |
4985 | which may be converted to | |
4986 | addr32 call ___tls_get_addr | |
4987 | into: | |
4988 | movl %gs:0, %eax; | |
4989 | subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 JJ |
4990 | roff = rel->r_offset - 2; |
4991 | } | |
4992 | memcpy (contents + roff, | |
4993 | "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12); | |
4994 | contents[roff + 7] = 0x80 | (val & 7); | |
37e55690 JJ |
4995 | /* If foo is used only with foo@gotntpoff(%reg) and |
4996 | foo@indntpoff, but not with foo@gottpoff(%reg), change | |
4997 | subl $foo@gottpoff(%reg), %eax | |
4998 | into: | |
4999 | addl $foo@gotntpoff(%reg), %eax. */ | |
ebcfb3c0 JJ |
5000 | if (tls_type == GOT_TLS_IE_POS) |
5001 | contents[roff + 6] = 0x03; | |
8c37241b | 5002 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5003 | htab->elf.sgot->output_section->vma |
5004 | + htab->elf.sgot->output_offset + off | |
5005 | - htab->elf.sgotplt->output_section->vma | |
5006 | - htab->elf.sgotplt->output_offset, | |
13ae64f3 | 5007 | contents + roff + 8); |
6eaa7fb5 | 5008 | /* Skip R_386_PLT32 and R_386_GOT32X. */ |
13ae64f3 | 5009 | rel++; |
60f2e42e | 5010 | wrel++; |
13ae64f3 JJ |
5011 | continue; |
5012 | } | |
67a4f2b7 AO |
5013 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
5014 | { | |
5015 | /* GDesc -> IE transition. | |
5016 | It's originally something like: | |
5017 | leal x@tlsdesc(%ebx), %eax | |
5018 | ||
5019 | Change it to: | |
142411ca | 5020 | movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax |
67a4f2b7 AO |
5021 | or: |
5022 | movl x@gottpoff(%ebx), %eax # before negl %eax | |
5023 | ||
5024 | Registers other than %eax may be set up here. */ | |
5025 | ||
67a4f2b7 AO |
5026 | bfd_vma roff; |
5027 | ||
5028 | /* First, make sure it's a leal adding ebx to a 32-bit | |
5029 | offset into any register, although it's probably | |
5030 | almost always going to be eax. */ | |
5031 | roff = rel->r_offset; | |
67a4f2b7 AO |
5032 | |
5033 | /* Now modify the instruction as appropriate. */ | |
5034 | /* To turn a leal into a movl in the form we use it, it | |
5035 | suffices to change the first byte from 0x8d to 0x8b. | |
5036 | aoliva FIXME: should we decide to keep the leal, all | |
5037 | we have to do is remove the statement below, and | |
5038 | adjust the relaxation of R_386_TLS_DESC_CALL. */ | |
5039 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
5040 | ||
5041 | if (tls_type == GOT_TLS_IE_BOTH) | |
5042 | off += 4; | |
5043 | ||
5044 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
5045 | htab->elf.sgot->output_section->vma |
5046 | + htab->elf.sgot->output_offset + off | |
5047 | - htab->elf.sgotplt->output_section->vma | |
5048 | - htab->elf.sgotplt->output_offset, | |
67a4f2b7 AO |
5049 | contents + roff); |
5050 | continue; | |
5051 | } | |
5052 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
5053 | { | |
5054 | /* GDesc -> IE transition. | |
5055 | It's originally: | |
5056 | call *(%eax) | |
5057 | ||
5058 | Change it to: | |
142411ca | 5059 | xchg %ax,%ax |
67a4f2b7 AO |
5060 | or |
5061 | negl %eax | |
5062 | depending on how we transformed the TLS_GOTDESC above. | |
5063 | */ | |
5064 | ||
67a4f2b7 AO |
5065 | bfd_vma roff; |
5066 | ||
67a4f2b7 | 5067 | roff = rel->r_offset; |
67a4f2b7 AO |
5068 | |
5069 | /* Now modify the instruction as appropriate. */ | |
5070 | if (tls_type != GOT_TLS_IE_NEG) | |
5071 | { | |
10efb593 L |
5072 | /* xchg %ax,%ax */ |
5073 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
5074 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
5075 | } | |
5076 | else | |
5077 | { | |
5078 | /* negl %eax */ | |
5079 | bfd_put_8 (output_bfd, 0xf7, contents + roff); | |
5080 | bfd_put_8 (output_bfd, 0xd8, contents + roff + 1); | |
5081 | } | |
5082 | ||
5083 | continue; | |
5084 | } | |
5085 | else | |
5086 | BFD_ASSERT (FALSE); | |
13ae64f3 JJ |
5087 | break; |
5088 | ||
5089 | case R_386_TLS_LDM: | |
142411ca L |
5090 | if (! elf_i386_tls_transition (info, input_bfd, |
5091 | input_section, contents, | |
5092 | symtab_hdr, sym_hashes, | |
5093 | &r_type, GOT_UNKNOWN, rel, | |
bedfd056 | 5094 | relend, h, r_symndx, TRUE)) |
142411ca | 5095 | return FALSE; |
13ae64f3 | 5096 | |
142411ca L |
5097 | if (r_type != R_386_TLS_LDM) |
5098 | { | |
6eaa7fb5 L |
5099 | /* LD->LE transition. Change |
5100 | leal foo@tlsldm(%ebx) %eax | |
5101 | call ___tls_get_addr@PLT | |
5102 | into: | |
5103 | movl %gs:0, %eax | |
5104 | nop | |
5105 | leal 0(%esi,1), %esi | |
5106 | or change | |
5107 | leal foo@tlsldm(%reg) %eax | |
5108 | call *___tls_get_addr@GOT(%reg) | |
5109 | which may be converted to | |
5110 | addr32 call ___tls_get_addr | |
5111 | into: | |
5112 | movl %gs:0, %eax | |
5113 | leal 0(%esi), %esi */ | |
142411ca | 5114 | BFD_ASSERT (r_type == R_386_TLS_LE_32); |
6eaa7fb5 L |
5115 | if (*(contents + rel->r_offset + 4) == 0xff |
5116 | || *(contents + rel->r_offset + 4) == 0x67) | |
5117 | memcpy (contents + rel->r_offset - 2, | |
5118 | "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12); | |
5119 | else | |
5120 | memcpy (contents + rel->r_offset - 2, | |
5121 | "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11); | |
a3fadc9a | 5122 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 | 5123 | rel++; |
60f2e42e | 5124 | wrel++; |
13ae64f3 JJ |
5125 | continue; |
5126 | } | |
5127 | ||
6de2ae4a | 5128 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
5129 | abort (); |
5130 | ||
5131 | off = htab->tls_ldm_got.offset; | |
5132 | if (off & 1) | |
5133 | off &= ~1; | |
5134 | else | |
5135 | { | |
947216bf | 5136 | Elf_Internal_Rela outrel; |
13ae64f3 | 5137 | |
6de2ae4a | 5138 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
5139 | abort (); |
5140 | ||
6de2ae4a L |
5141 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5142 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 JJ |
5143 | |
5144 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 5145 | htab->elf.sgot->contents + off); |
13ae64f3 | 5146 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 5147 | htab->elf.sgot->contents + off + 4); |
13ae64f3 | 5148 | outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32); |
59d6ffb2 | 5149 | elf_append_rel (output_bfd, htab->elf.srelgot, &outrel); |
13ae64f3 JJ |
5150 | htab->tls_ldm_got.offset |= 1; |
5151 | } | |
6de2ae4a L |
5152 | relocation = htab->elf.sgot->output_section->vma |
5153 | + htab->elf.sgot->output_offset + off | |
5154 | - htab->elf.sgotplt->output_section->vma | |
5155 | - htab->elf.sgotplt->output_offset; | |
b34976b6 | 5156 | unresolved_reloc = FALSE; |
13ae64f3 JJ |
5157 | break; |
5158 | ||
5159 | case R_386_TLS_LDO_32: | |
0e1862bb L |
5160 | if (!bfd_link_executable (info) |
5161 | || (input_section->flags & SEC_CODE) == 0) | |
eb4ff4d6 | 5162 | relocation -= elf_i386_dtpoff_base (info); |
13ae64f3 JJ |
5163 | else |
5164 | /* When converting LDO to LE, we must negate. */ | |
eb4ff4d6 | 5165 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
5166 | break; |
5167 | ||
5168 | case R_386_TLS_LE_32: | |
13ae64f3 | 5169 | case R_386_TLS_LE: |
0e1862bb | 5170 | if (!bfd_link_executable (info)) |
37e55690 | 5171 | { |
947216bf | 5172 | Elf_Internal_Rela outrel; |
37e55690 | 5173 | asection *sreloc; |
37e55690 JJ |
5174 | |
5175 | outrel.r_offset = rel->r_offset | |
5176 | + input_section->output_section->vma | |
5177 | + input_section->output_offset; | |
5178 | if (h != NULL && h->dynindx != -1) | |
5179 | indx = h->dynindx; | |
5180 | else | |
5181 | indx = 0; | |
5182 | if (r_type == R_386_TLS_LE_32) | |
5183 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32); | |
5184 | else | |
5185 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); | |
5186 | sreloc = elf_section_data (input_section)->sreloc; | |
5187 | if (sreloc == NULL) | |
5188 | abort (); | |
59d6ffb2 | 5189 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
5190 | if (indx) |
5191 | continue; | |
5192 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 5193 | relocation = elf_i386_dtpoff_base (info) - relocation; |
37e55690 | 5194 | else |
eb4ff4d6 | 5195 | relocation -= elf_i386_dtpoff_base (info); |
37e55690 JJ |
5196 | } |
5197 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 5198 | relocation = elf_i386_tpoff (info, relocation); |
37e55690 | 5199 | else |
eb4ff4d6 | 5200 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
5201 | break; |
5202 | ||
252b5132 RH |
5203 | default: |
5204 | break; | |
5205 | } | |
5206 | ||
239e1f3a AM |
5207 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
5208 | because such sections are not SEC_ALLOC and thus ld.so will | |
5209 | not process them. */ | |
8c694914 | 5210 | if (unresolved_reloc |
239e1f3a | 5211 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
5212 | && h->def_dynamic) |
5213 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
5214 | rel->r_offset) != (bfd_vma) -1) | |
6a30718d | 5215 | { |
4eca0228 | 5216 | _bfd_error_handler |
695344c0 | 5217 | /* xgettext:c-format */ |
843fe662 | 5218 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
5219 | input_bfd, |
5220 | input_section, | |
6a30718d | 5221 | (long) rel->r_offset, |
843fe662 | 5222 | howto->name, |
6a30718d | 5223 | h->root.root.string); |
b34976b6 | 5224 | return FALSE; |
6a30718d | 5225 | } |
83be169b | 5226 | |
cbe950e9 | 5227 | do_relocation: |
252b5132 RH |
5228 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
5229 | contents, rel->r_offset, | |
55fd94b0 | 5230 | relocation, 0); |
252b5132 | 5231 | |
62d78908 | 5232 | check_relocation_error: |
cf5c0c5b | 5233 | if (r != bfd_reloc_ok) |
252b5132 | 5234 | { |
cf5c0c5b | 5235 | const char *name; |
ffb2e45b | 5236 | |
cf5c0c5b AM |
5237 | if (h != NULL) |
5238 | name = h->root.root.string; | |
5239 | else | |
5240 | { | |
5241 | name = bfd_elf_string_from_elf_section (input_bfd, | |
5242 | symtab_hdr->sh_link, | |
5243 | sym->st_name); | |
5244 | if (name == NULL) | |
b34976b6 | 5245 | return FALSE; |
cf5c0c5b AM |
5246 | if (*name == '\0') |
5247 | name = bfd_section_name (input_bfd, sec); | |
5248 | } | |
ffb2e45b | 5249 | |
cf5c0c5b | 5250 | if (r == bfd_reloc_overflow) |
1a72702b AM |
5251 | (*info->callbacks->reloc_overflow) |
5252 | (info, (h ? &h->root : NULL), name, howto->name, | |
5253 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
cf5c0c5b AM |
5254 | else |
5255 | { | |
4eca0228 | 5256 | _bfd_error_handler |
695344c0 | 5257 | /* xgettext:c-format */ |
d003868e AM |
5258 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
5259 | input_bfd, input_section, | |
cf5c0c5b | 5260 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 5261 | return FALSE; |
cf5c0c5b | 5262 | } |
252b5132 | 5263 | } |
60f2e42e L |
5264 | |
5265 | if (wrel != rel) | |
5266 | *wrel = *rel; | |
5267 | } | |
5268 | ||
5269 | if (wrel != rel) | |
5270 | { | |
5271 | Elf_Internal_Shdr *rel_hdr; | |
5272 | size_t deleted = rel - wrel; | |
5273 | ||
5274 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
5275 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5276 | if (rel_hdr->sh_size == 0) | |
5277 | { | |
5278 | /* It is too late to remove an empty reloc section. Leave | |
5279 | one NONE reloc. | |
5280 | ??? What is wrong with an empty section??? */ | |
5281 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
5282 | deleted -= 1; | |
5283 | } | |
5284 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
5285 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5286 | input_section->reloc_count -= deleted; | |
252b5132 RH |
5287 | } |
5288 | ||
b34976b6 | 5289 | return TRUE; |
252b5132 RH |
5290 | } |
5291 | ||
5292 | /* Finish up dynamic symbol handling. We set the contents of various | |
5293 | dynamic sections here. */ | |
5294 | ||
b34976b6 | 5295 | static bfd_boolean |
55fd94b0 AM |
5296 | elf_i386_finish_dynamic_symbol (bfd *output_bfd, |
5297 | struct bfd_link_info *info, | |
5298 | struct elf_link_hash_entry *h, | |
5299 | Elf_Internal_Sym *sym) | |
252b5132 | 5300 | { |
6725bdbf | 5301 | struct elf_i386_link_hash_table *htab; |
25e762b9 RM |
5302 | unsigned plt_entry_size; |
5303 | const struct elf_i386_backend_data *abed; | |
dd7e64d4 | 5304 | struct elf_i386_link_hash_entry *eh; |
aec6b87e | 5305 | bfd_boolean local_undefweak; |
252b5132 | 5306 | |
6725bdbf | 5307 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
5308 | if (htab == NULL) |
5309 | return FALSE; | |
252b5132 | 5310 | |
25e762b9 RM |
5311 | abed = get_elf_i386_backend_data (output_bfd); |
5312 | plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd); | |
5313 | ||
dd7e64d4 L |
5314 | eh = (struct elf_i386_link_hash_entry *) h; |
5315 | ||
aec6b87e L |
5316 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
5317 | resolved undefined weak symbols in executable so that their | |
5318 | references have value 0 at run-time. */ | |
e62b9723 L |
5319 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
5320 | eh->has_got_reloc, | |
5321 | eh); | |
aec6b87e | 5322 | |
252b5132 RH |
5323 | if (h->plt.offset != (bfd_vma) -1) |
5324 | { | |
252b5132 RH |
5325 | bfd_vma plt_index; |
5326 | bfd_vma got_offset; | |
947216bf AM |
5327 | Elf_Internal_Rela rel; |
5328 | bfd_byte *loc; | |
cbe950e9 L |
5329 | asection *plt, *gotplt, *relplt; |
5330 | ||
5331 | /* When building a static executable, use .iplt, .igot.plt and | |
5332 | .rel.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 5333 | if (htab->elf.splt != NULL) |
cbe950e9 | 5334 | { |
6de2ae4a L |
5335 | plt = htab->elf.splt; |
5336 | gotplt = htab->elf.sgotplt; | |
5337 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
5338 | } |
5339 | else | |
5340 | { | |
6de2ae4a L |
5341 | plt = htab->elf.iplt; |
5342 | gotplt = htab->elf.igotplt; | |
5343 | relplt = htab->elf.irelplt; | |
cbe950e9 | 5344 | } |
252b5132 RH |
5345 | |
5346 | /* This symbol has an entry in the procedure linkage table. Set | |
5347 | it up. */ | |
5348 | ||
cbe950e9 | 5349 | if ((h->dynindx == -1 |
aec6b87e | 5350 | && !local_undefweak |
0e1862bb | 5351 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
5352 | && h->def_regular |
5353 | && h->type == STT_GNU_IFUNC)) | |
5354 | || plt == NULL | |
5355 | || gotplt == NULL | |
5356 | || relplt == NULL) | |
cec7f46a | 5357 | abort (); |
252b5132 RH |
5358 | |
5359 | /* Get the index in the procedure linkage table which | |
5360 | corresponds to this symbol. This is the index of this symbol | |
5361 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 5362 | first entry in the procedure linkage table is reserved. |
252b5132 | 5363 | |
cbe950e9 | 5364 | Get the offset into the .got table of the entry that |
252b5132 | 5365 | corresponds to this function. Each .got entry is 4 bytes. |
cbe950e9 | 5366 | The first three are reserved. |
6bbec505 | 5367 | |
cbe950e9 L |
5368 | For static executables, we don't reserve anything. */ |
5369 | ||
6de2ae4a | 5370 | if (plt == htab->elf.splt) |
cbe950e9 | 5371 | { |
e1f98742 L |
5372 | got_offset = h->plt.offset / plt_entry_size - 1; |
5373 | got_offset = (got_offset + 3) * 4; | |
cbe950e9 L |
5374 | } |
5375 | else | |
5376 | { | |
e1f98742 L |
5377 | got_offset = h->plt.offset / plt_entry_size; |
5378 | got_offset = got_offset * 4; | |
cbe950e9 | 5379 | } |
252b5132 RH |
5380 | |
5381 | /* Fill in the entry in the procedure linkage table. */ | |
0e1862bb | 5382 | if (! bfd_link_pic (info)) |
252b5132 | 5383 | { |
25e762b9 RM |
5384 | memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry, |
5385 | abed->plt->plt_entry_size); | |
252b5132 | 5386 | bfd_put_32 (output_bfd, |
cbe950e9 L |
5387 | (gotplt->output_section->vma |
5388 | + gotplt->output_offset | |
252b5132 | 5389 | + got_offset), |
25e762b9 RM |
5390 | plt->contents + h->plt.offset |
5391 | + abed->plt->plt_got_offset); | |
eac338cf | 5392 | |
25e762b9 | 5393 | if (abed->is_vxworks) |
eac338cf PB |
5394 | { |
5395 | int s, k, reloc_index; | |
5396 | ||
5397 | /* Create the R_386_32 relocation referencing the GOT | |
5398 | for this PLT entry. */ | |
5399 | ||
5400 | /* S: Current slot number (zero-based). */ | |
25e762b9 RM |
5401 | s = ((h->plt.offset - abed->plt->plt_entry_size) |
5402 | / abed->plt->plt_entry_size); | |
eac338cf | 5403 | /* K: Number of relocations for PLTResolve. */ |
0e1862bb | 5404 | if (bfd_link_pic (info)) |
eac338cf PB |
5405 | k = PLTRESOLVE_RELOCS_SHLIB; |
5406 | else | |
5407 | k = PLTRESOLVE_RELOCS; | |
5408 | /* Skip the PLTresolve relocations, and the relocations for | |
5409 | the other PLT slots. */ | |
5410 | reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS; | |
5411 | loc = (htab->srelplt2->contents + reloc_index | |
5412 | * sizeof (Elf32_External_Rel)); | |
5413 | ||
6de2ae4a L |
5414 | rel.r_offset = (htab->elf.splt->output_section->vma |
5415 | + htab->elf.splt->output_offset | |
eac338cf | 5416 | + h->plt.offset + 2), |
7325306f | 5417 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5418 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
5419 | ||
5420 | /* Create the R_386_32 relocation referencing the beginning of | |
5421 | the PLT for this GOT entry. */ | |
6de2ae4a L |
5422 | rel.r_offset = (htab->elf.sgotplt->output_section->vma |
5423 | + htab->elf.sgotplt->output_offset | |
eac338cf | 5424 | + got_offset); |
7325306f | 5425 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf | 5426 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
13ca3149 | 5427 | loc + sizeof (Elf32_External_Rel)); |
eac338cf | 5428 | } |
252b5132 RH |
5429 | } |
5430 | else | |
5431 | { | |
25e762b9 RM |
5432 | memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry, |
5433 | abed->plt->plt_entry_size); | |
252b5132 | 5434 | bfd_put_32 (output_bfd, got_offset, |
25e762b9 RM |
5435 | plt->contents + h->plt.offset |
5436 | + abed->plt->plt_got_offset); | |
252b5132 RH |
5437 | } |
5438 | ||
aec6b87e L |
5439 | /* Fill in the entry in the global offset table. Leave the entry |
5440 | as zero for undefined weak symbol in PIE. No PLT relocation | |
5441 | against undefined weak symbol in PIE. */ | |
5442 | if (!local_undefweak) | |
cbe950e9 | 5443 | { |
cbe950e9 | 5444 | bfd_put_32 (output_bfd, |
aec6b87e L |
5445 | (plt->output_section->vma |
5446 | + plt->output_offset | |
5447 | + h->plt.offset | |
5448 | + abed->plt->plt_lazy_offset), | |
cbe950e9 | 5449 | gotplt->contents + got_offset); |
252b5132 | 5450 | |
aec6b87e L |
5451 | /* Fill in the entry in the .rel.plt section. */ |
5452 | rel.r_offset = (gotplt->output_section->vma | |
5453 | + gotplt->output_offset | |
5454 | + got_offset); | |
5455 | if (h->dynindx == -1 | |
5456 | || ((bfd_link_executable (info) | |
5457 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
5458 | && h->def_regular | |
5459 | && h->type == STT_GNU_IFUNC)) | |
5460 | { | |
5461 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
5462 | R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend | |
5463 | in the .got.plt section. */ | |
5464 | bfd_put_32 (output_bfd, | |
5465 | (h->root.u.def.value | |
5466 | + h->root.u.def.section->output_section->vma | |
5467 | + h->root.u.def.section->output_offset), | |
5468 | gotplt->contents + got_offset); | |
5469 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
5470 | /* R_386_IRELATIVE comes last. */ | |
5471 | plt_index = htab->next_irelative_index--; | |
5472 | } | |
5473 | else | |
5474 | { | |
5475 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
5476 | plt_index = htab->next_jump_slot_index++; | |
5477 | } | |
5478 | ||
5479 | loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel); | |
5480 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
5481 | ||
5482 | /* Don't fill PLT entry for static executables. */ | |
5483 | if (plt == htab->elf.splt) | |
5484 | { | |
5485 | bfd_put_32 (output_bfd, | |
5486 | plt_index * sizeof (Elf32_External_Rel), | |
5487 | plt->contents + h->plt.offset | |
5488 | + abed->plt->plt_reloc_offset); | |
5489 | bfd_put_32 (output_bfd, - (h->plt.offset | |
5490 | + abed->plt->plt_plt_offset + 4), | |
5491 | plt->contents + h->plt.offset | |
5492 | + abed->plt->plt_plt_offset); | |
5493 | } | |
e1f98742 | 5494 | } |
dd7e64d4 L |
5495 | } |
5496 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
5497 | { | |
5498 | bfd_vma got_offset, plt_offset; | |
5499 | asection *plt, *got, *gotplt; | |
5500 | const bfd_byte *got_plt_entry; | |
5501 | ||
5502 | /* Offset of displacement of the indirect jump. */ | |
5503 | bfd_vma plt_got_offset = 2; | |
e1f98742 | 5504 | |
dd7e64d4 L |
5505 | /* Set the entry in the GOT procedure linkage table. */ |
5506 | plt = htab->plt_got; | |
5507 | got = htab->elf.sgot; | |
5508 | gotplt = htab->elf.sgotplt; | |
5509 | got_offset = h->got.offset; | |
5510 | ||
5511 | if (got_offset == (bfd_vma) -1 | |
5512 | || plt == NULL | |
5513 | || got == NULL | |
5514 | || gotplt == NULL) | |
5515 | abort (); | |
5516 | ||
5517 | /* Fill in the entry in the GOT procedure linkage table. */ | |
0e1862bb | 5518 | if (! bfd_link_pic (info)) |
252b5132 | 5519 | { |
dd7e64d4 L |
5520 | got_plt_entry = elf_i386_got_plt_entry; |
5521 | got_offset += got->output_section->vma + got->output_offset; | |
252b5132 | 5522 | } |
dd7e64d4 L |
5523 | else |
5524 | { | |
5525 | got_plt_entry = elf_i386_pic_got_plt_entry; | |
5526 | got_offset += (got->output_section->vma | |
5527 | + got->output_offset | |
5528 | - gotplt->output_section->vma | |
5529 | - gotplt->output_offset); | |
5530 | } | |
5531 | ||
5532 | plt_offset = eh->plt_got.offset; | |
5533 | memcpy (plt->contents + plt_offset, got_plt_entry, | |
5534 | sizeof (elf_i386_got_plt_entry)); | |
5535 | bfd_put_32 (output_bfd, got_offset, | |
5536 | plt->contents + plt_offset + plt_got_offset); | |
5537 | } | |
5538 | ||
aec6b87e L |
5539 | if (!local_undefweak |
5540 | && !h->def_regular | |
dd7e64d4 L |
5541 | && (h->plt.offset != (bfd_vma) -1 |
5542 | || eh->plt_got.offset != (bfd_vma) -1)) | |
5543 | { | |
5544 | /* Mark the symbol as undefined, rather than as defined in | |
5545 | the .plt section. Leave the value if there were any | |
5546 | relocations where pointer equality matters (this is a clue | |
5547 | for the dynamic linker, to make function pointer | |
5548 | comparisons work between an application and shared | |
5549 | library), otherwise set it to zero. If a function is only | |
5550 | called from a binary, there is no need to slow down | |
5551 | shared libraries because of that. */ | |
5552 | sym->st_shndx = SHN_UNDEF; | |
5553 | if (!h->pointer_equality_needed) | |
5554 | sym->st_value = 0; | |
252b5132 RH |
5555 | } |
5556 | ||
aec6b87e L |
5557 | /* Don't generate dynamic GOT relocation against undefined weak |
5558 | symbol in executable. */ | |
13ae64f3 | 5559 | if (h->got.offset != (bfd_vma) -1 |
67a4f2b7 | 5560 | && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type) |
aec6b87e L |
5561 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0 |
5562 | && !local_undefweak) | |
252b5132 | 5563 | { |
947216bf | 5564 | Elf_Internal_Rela rel; |
233cc9c1 | 5565 | asection *relgot = htab->elf.srelgot; |
252b5132 RH |
5566 | |
5567 | /* This symbol has an entry in the global offset table. Set it | |
5568 | up. */ | |
5569 | ||
6de2ae4a | 5570 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
ffb2e45b | 5571 | abort (); |
252b5132 | 5572 | |
6de2ae4a L |
5573 | rel.r_offset = (htab->elf.sgot->output_section->vma |
5574 | + htab->elf.sgot->output_offset | |
dc810e39 | 5575 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 5576 | |
dd5724d5 AM |
5577 | /* If this is a static link, or it is a -Bsymbolic link and the |
5578 | symbol is defined locally or was forced to be local because | |
5579 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
5580 | The entry in the global offset table will already have been |
5581 | initialized in the relocate_section function. */ | |
710ab287 | 5582 | if (h->def_regular |
0018b0a3 L |
5583 | && h->type == STT_GNU_IFUNC) |
5584 | { | |
233cc9c1 L |
5585 | if (h->plt.offset == (bfd_vma) -1) |
5586 | { | |
5587 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
5588 | if (htab->elf.splt == NULL) | |
5589 | { | |
5590 | /* use .rel[a].iplt section to store .got relocations | |
5591 | in static executable. */ | |
5592 | relgot = htab->elf.irelplt; | |
5593 | } | |
5594 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
5595 | { | |
5596 | bfd_put_32 (output_bfd, | |
5597 | (h->root.u.def.value | |
5598 | + h->root.u.def.section->output_section->vma | |
5599 | + h->root.u.def.section->output_offset), | |
5600 | htab->elf.sgot->contents + h->got.offset); | |
5601 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
5602 | } | |
5603 | else | |
5604 | goto do_glob_dat; | |
5605 | } | |
5606 | else if (bfd_link_pic (info)) | |
710ab287 L |
5607 | { |
5608 | /* Generate R_386_GLOB_DAT. */ | |
5609 | goto do_glob_dat; | |
5610 | } | |
5611 | else | |
5612 | { | |
cd2b2c10 L |
5613 | asection *plt; |
5614 | ||
710ab287 L |
5615 | if (!h->pointer_equality_needed) |
5616 | abort (); | |
5617 | ||
5618 | /* For non-shared object, we can't use .got.plt, which | |
5619 | contains the real function addres if we need pointer | |
5620 | equality. We load the GOT entry with the PLT entry. */ | |
cd2b2c10 | 5621 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
5622 | bfd_put_32 (output_bfd, |
5623 | (plt->output_section->vma | |
5624 | + plt->output_offset + h->plt.offset), | |
6de2ae4a | 5625 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
5626 | return TRUE; |
5627 | } | |
0018b0a3 | 5628 | } |
0e1862bb | 5629 | else if (bfd_link_pic (info) |
0018b0a3 | 5630 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
dd5724d5 | 5631 | { |
6725bdbf | 5632 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 AM |
5633 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
5634 | } | |
252b5132 RH |
5635 | else |
5636 | { | |
dd5724d5 | 5637 | BFD_ASSERT((h->got.offset & 1) == 0); |
710ab287 | 5638 | do_glob_dat: |
6725bdbf | 5639 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 5640 | htab->elf.sgot->contents + h->got.offset); |
252b5132 RH |
5641 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
5642 | } | |
5643 | ||
233cc9c1 | 5644 | elf_append_rel (output_bfd, relgot, &rel); |
252b5132 RH |
5645 | } |
5646 | ||
f5385ebf | 5647 | if (h->needs_copy) |
252b5132 | 5648 | { |
947216bf | 5649 | Elf_Internal_Rela rel; |
5474d94f | 5650 | asection *s; |
252b5132 RH |
5651 | |
5652 | /* This symbol needs a copy reloc. Set it up. */ | |
5653 | ||
ffb2e45b AM |
5654 | if (h->dynindx == -1 |
5655 | || (h->root.type != bfd_link_hash_defined | |
5656 | && h->root.type != bfd_link_hash_defweak) | |
5474d94f AM |
5657 | || htab->elf.srelbss == NULL |
5658 | || htab->elf.sreldynrelro == NULL) | |
ffb2e45b | 5659 | abort (); |
252b5132 RH |
5660 | |
5661 | rel.r_offset = (h->root.u.def.value | |
5662 | + h->root.u.def.section->output_section->vma | |
5663 | + h->root.u.def.section->output_offset); | |
5664 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
5474d94f AM |
5665 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
5666 | s = htab->elf.sreldynrelro; | |
5667 | else | |
5668 | s = htab->elf.srelbss; | |
5669 | elf_append_rel (output_bfd, s, &rel); | |
252b5132 RH |
5670 | } |
5671 | ||
b34976b6 | 5672 | return TRUE; |
252b5132 RH |
5673 | } |
5674 | ||
c25bc9fc L |
5675 | /* Finish up local dynamic symbol handling. We set the contents of |
5676 | various dynamic sections here. */ | |
5677 | ||
5678 | static bfd_boolean | |
5679 | elf_i386_finish_local_dynamic_symbol (void **slot, void *inf) | |
5680 | { | |
5681 | struct elf_link_hash_entry *h | |
5682 | = (struct elf_link_hash_entry *) *slot; | |
5683 | struct bfd_link_info *info | |
23209a78 | 5684 | = (struct bfd_link_info *) inf; |
c25bc9fc L |
5685 | |
5686 | return elf_i386_finish_dynamic_symbol (info->output_bfd, info, | |
5687 | h, NULL); | |
5688 | } | |
5689 | ||
aec6b87e L |
5690 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
5691 | here since undefined weak symbol may not be dynamic and may not be | |
5692 | called for elf_i386_finish_dynamic_symbol. */ | |
5693 | ||
5694 | static bfd_boolean | |
5695 | elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
5696 | void *inf) | |
5697 | { | |
5698 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
5699 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
5700 | ||
5701 | if (h->root.type != bfd_link_hash_undefweak | |
5702 | || h->dynindx != -1) | |
5703 | return TRUE; | |
5704 | ||
5705 | return elf_i386_finish_dynamic_symbol (info->output_bfd, | |
5706 | info, h, NULL); | |
5707 | } | |
5708 | ||
38701953 AM |
5709 | /* Used to decide how to sort relocs in an optimal manner for the |
5710 | dynamic linker, before writing them out. */ | |
5711 | ||
5712 | static enum elf_reloc_type_class | |
cae1fbbb | 5713 | elf_i386_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
5714 | const asection *rel_sec ATTRIBUTE_UNUSED, |
5715 | const Elf_Internal_Rela *rela) | |
38701953 | 5716 | { |
cae1fbbb L |
5717 | bfd *abfd = info->output_bfd; |
5718 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
5719 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
cae1fbbb | 5720 | |
d9e3b590 L |
5721 | if (htab->dynsym != NULL |
5722 | && htab->dynsym->contents != NULL) | |
5723 | { | |
5724 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
5725 | dynamic symbols. */ | |
5726 | unsigned long r_symndx = ELF32_R_SYM (rela->r_info); | |
c428ce9d L |
5727 | if (r_symndx != STN_UNDEF) |
5728 | { | |
5729 | Elf_Internal_Sym sym; | |
5730 | if (!bed->s->swap_symbol_in (abfd, | |
5731 | (htab->dynsym->contents | |
5732 | + r_symndx * sizeof (Elf32_External_Sym)), | |
5733 | 0, &sym)) | |
5734 | abort (); | |
d9e3b590 | 5735 | |
c428ce9d L |
5736 | if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
5737 | return reloc_class_ifunc; | |
5738 | } | |
d9e3b590 | 5739 | } |
cae1fbbb | 5740 | |
55fd94b0 | 5741 | switch (ELF32_R_TYPE (rela->r_info)) |
38701953 | 5742 | { |
c428ce9d L |
5743 | case R_386_IRELATIVE: |
5744 | return reloc_class_ifunc; | |
38701953 AM |
5745 | case R_386_RELATIVE: |
5746 | return reloc_class_relative; | |
5747 | case R_386_JUMP_SLOT: | |
5748 | return reloc_class_plt; | |
5749 | case R_386_COPY: | |
5750 | return reloc_class_copy; | |
5751 | default: | |
5752 | return reloc_class_normal; | |
5753 | } | |
5754 | } | |
5755 | ||
252b5132 RH |
5756 | /* Finish up the dynamic sections. */ |
5757 | ||
b34976b6 | 5758 | static bfd_boolean |
55fd94b0 AM |
5759 | elf_i386_finish_dynamic_sections (bfd *output_bfd, |
5760 | struct bfd_link_info *info) | |
252b5132 | 5761 | { |
6725bdbf | 5762 | struct elf_i386_link_hash_table *htab; |
252b5132 | 5763 | bfd *dynobj; |
252b5132 | 5764 | asection *sdyn; |
25e762b9 | 5765 | const struct elf_i386_backend_data *abed; |
252b5132 | 5766 | |
6725bdbf | 5767 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
5768 | if (htab == NULL) |
5769 | return FALSE; | |
5770 | ||
ebe50bae | 5771 | dynobj = htab->elf.dynobj; |
3d4d4302 | 5772 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
25e762b9 | 5773 | abed = get_elf_i386_backend_data (output_bfd); |
252b5132 | 5774 | |
ebe50bae | 5775 | if (htab->elf.dynamic_sections_created) |
252b5132 | 5776 | { |
252b5132 RH |
5777 | Elf32_External_Dyn *dyncon, *dynconend; |
5778 | ||
6de2ae4a | 5779 | if (sdyn == NULL || htab->elf.sgot == NULL) |
ffb2e45b | 5780 | abort (); |
252b5132 RH |
5781 | |
5782 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 5783 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
252b5132 RH |
5784 | for (; dyncon < dynconend; dyncon++) |
5785 | { | |
5786 | Elf_Internal_Dyn dyn; | |
51b64d56 | 5787 | asection *s; |
252b5132 RH |
5788 | |
5789 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
5790 | ||
5791 | switch (dyn.d_tag) | |
5792 | { | |
5793 | default: | |
25e762b9 RM |
5794 | if (abed->is_vxworks |
5795 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) | |
7a2b07ff | 5796 | break; |
0ac8d2ca | 5797 | continue; |
252b5132 RH |
5798 | |
5799 | case DT_PLTGOT: | |
6de2ae4a | 5800 | s = htab->elf.sgotplt; |
8c37241b | 5801 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
6725bdbf AM |
5802 | break; |
5803 | ||
252b5132 | 5804 | case DT_JMPREL: |
6de2ae4a | 5805 | s = htab->elf.srelplt; |
6348e046 | 5806 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
252b5132 RH |
5807 | break; |
5808 | ||
5809 | case DT_PLTRELSZ: | |
6de2ae4a | 5810 | s = htab->elf.srelplt; |
eea6121a | 5811 | dyn.d_un.d_val = s->size; |
252b5132 | 5812 | break; |
252b5132 | 5813 | } |
0ac8d2ca AM |
5814 | |
5815 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
252b5132 RH |
5816 | } |
5817 | ||
5818 | /* Fill in the first entry in the procedure linkage table. */ | |
6de2ae4a | 5819 | if (htab->elf.splt && htab->elf.splt->size > 0) |
252b5132 | 5820 | { |
0e1862bb | 5821 | if (bfd_link_pic (info)) |
eac338cf | 5822 | { |
25e762b9 RM |
5823 | memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry, |
5824 | abed->plt->plt0_entry_size); | |
5825 | memset (htab->elf.splt->contents + abed->plt->plt0_entry_size, | |
5826 | abed->plt0_pad_byte, | |
5827 | abed->plt->plt_entry_size - abed->plt->plt0_entry_size); | |
eac338cf | 5828 | } |
252b5132 RH |
5829 | else |
5830 | { | |
25e762b9 RM |
5831 | memcpy (htab->elf.splt->contents, abed->plt->plt0_entry, |
5832 | abed->plt->plt0_entry_size); | |
5833 | memset (htab->elf.splt->contents + abed->plt->plt0_entry_size, | |
5834 | abed->plt0_pad_byte, | |
5835 | abed->plt->plt_entry_size - abed->plt->plt0_entry_size); | |
252b5132 | 5836 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5837 | (htab->elf.sgotplt->output_section->vma |
5838 | + htab->elf.sgotplt->output_offset | |
6725bdbf | 5839 | + 4), |
25e762b9 RM |
5840 | htab->elf.splt->contents |
5841 | + abed->plt->plt0_got1_offset); | |
252b5132 | 5842 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5843 | (htab->elf.sgotplt->output_section->vma |
5844 | + htab->elf.sgotplt->output_offset | |
6725bdbf | 5845 | + 8), |
25e762b9 RM |
5846 | htab->elf.splt->contents |
5847 | + abed->plt->plt0_got2_offset); | |
eac338cf | 5848 | |
25e762b9 | 5849 | if (abed->is_vxworks) |
eac338cf PB |
5850 | { |
5851 | Elf_Internal_Rela rel; | |
7325306f | 5852 | |
eac338cf PB |
5853 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4. |
5854 | On IA32 we use REL relocations so the addend goes in | |
5855 | the PLT directly. */ | |
6de2ae4a L |
5856 | rel.r_offset = (htab->elf.splt->output_section->vma |
5857 | + htab->elf.splt->output_offset | |
25e762b9 | 5858 | + abed->plt->plt0_got1_offset); |
7325306f | 5859 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5860 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
5861 | htab->srelplt2->contents); | |
5862 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
6de2ae4a L |
5863 | rel.r_offset = (htab->elf.splt->output_section->vma |
5864 | + htab->elf.splt->output_offset | |
25e762b9 | 5865 | + abed->plt->plt0_got2_offset); |
7325306f | 5866 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5867 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
5868 | htab->srelplt2->contents + | |
5869 | sizeof (Elf32_External_Rel)); | |
5870 | } | |
252b5132 RH |
5871 | } |
5872 | ||
5873 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
5874 | really seem like the right value. */ | |
6de2ae4a | 5875 | elf_section_data (htab->elf.splt->output_section) |
6725bdbf | 5876 | ->this_hdr.sh_entsize = 4; |
eac338cf PB |
5877 | |
5878 | /* Correct the .rel.plt.unloaded relocations. */ | |
0e1862bb | 5879 | if (abed->is_vxworks && !bfd_link_pic (info)) |
eac338cf | 5880 | { |
25e762b9 RM |
5881 | int num_plts = (htab->elf.splt->size |
5882 | / abed->plt->plt_entry_size) - 1; | |
4c9b0de6 | 5883 | unsigned char *p; |
eac338cf PB |
5884 | |
5885 | p = htab->srelplt2->contents; | |
0e1862bb | 5886 | if (bfd_link_pic (info)) |
eac338cf PB |
5887 | p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel); |
5888 | else | |
5889 | p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel); | |
5890 | ||
5891 | for (; num_plts; num_plts--) | |
5892 | { | |
5893 | Elf_Internal_Rela rel; | |
5894 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 5895 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5896 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
5897 | p += sizeof (Elf32_External_Rel); | |
5898 | ||
5899 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 5900 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf PB |
5901 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
5902 | p += sizeof (Elf32_External_Rel); | |
5903 | } | |
5904 | } | |
252b5132 RH |
5905 | } |
5906 | } | |
5907 | ||
6de2ae4a | 5908 | if (htab->elf.sgotplt) |
252b5132 | 5909 | { |
56d4289c L |
5910 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
5911 | { | |
4eca0228 | 5912 | _bfd_error_handler |
56d4289c L |
5913 | (_("discarded output section: `%A'"), htab->elf.sgotplt); |
5914 | return FALSE; | |
5915 | } | |
5916 | ||
12d0ee4a | 5917 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 5918 | if (htab->elf.sgotplt->size > 0) |
12d0ee4a AM |
5919 | { |
5920 | bfd_put_32 (output_bfd, | |
55fd94b0 | 5921 | (sdyn == NULL ? 0 |
12d0ee4a | 5922 | : sdyn->output_section->vma + sdyn->output_offset), |
6de2ae4a L |
5923 | htab->elf.sgotplt->contents); |
5924 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4); | |
5925 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8); | |
12d0ee4a | 5926 | } |
252b5132 | 5927 | |
6de2ae4a | 5928 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4; |
12d0ee4a | 5929 | } |
8c37241b | 5930 | |
e41b3a13 | 5931 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
5932 | if (htab->plt_eh_frame != NULL |
5933 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
5934 | { |
5935 | if (htab->elf.splt != NULL | |
5936 | && htab->elf.splt->size != 0 | |
5937 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
5938 | && htab->elf.splt->output_section != NULL | |
5939 | && htab->plt_eh_frame->output_section != NULL) | |
5940 | { | |
5941 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
5942 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
5943 | + htab->plt_eh_frame->output_offset | |
5944 | + PLT_FDE_START_OFFSET; | |
5945 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5946 | htab->plt_eh_frame->contents | |
5947 | + PLT_FDE_START_OFFSET); | |
5948 | } | |
5949 | if (htab->plt_eh_frame->sec_info_type | |
dbaa2011 | 5950 | == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
5951 | { |
5952 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5953 | htab->plt_eh_frame, | |
5954 | htab->plt_eh_frame->contents)) | |
5955 | return FALSE; | |
5956 | } | |
5957 | } | |
5958 | ||
fff53dae L |
5959 | /* Adjust .eh_frame for .plt.got section. */ |
5960 | if (htab->plt_got_eh_frame != NULL | |
5961 | && htab->plt_got_eh_frame->contents != NULL) | |
5962 | { | |
5963 | if (htab->plt_got != NULL | |
5964 | && htab->plt_got->size != 0 | |
5965 | && (htab->plt_got->flags & SEC_EXCLUDE) == 0 | |
5966 | && htab->plt_got->output_section != NULL | |
5967 | && htab->plt_got_eh_frame->output_section != NULL) | |
5968 | { | |
5969 | bfd_vma plt_start = htab->plt_got->output_section->vma; | |
5970 | bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma | |
5971 | + htab->plt_got_eh_frame->output_offset | |
5972 | + PLT_FDE_START_OFFSET; | |
5973 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5974 | htab->plt_got_eh_frame->contents | |
5975 | + PLT_FDE_START_OFFSET); | |
5976 | } | |
5977 | if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
5978 | { | |
5979 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5980 | htab->plt_got_eh_frame, | |
5981 | htab->plt_got_eh_frame->contents)) | |
5982 | return FALSE; | |
5983 | } | |
5984 | } | |
5985 | ||
6de2ae4a L |
5986 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
5987 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4; | |
8c37241b | 5988 | |
aec6b87e L |
5989 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
5990 | if (bfd_link_pie (info)) | |
5991 | bfd_hash_traverse (&info->hash->table, | |
5992 | elf_i386_pie_finish_undefweak_symbol, | |
5993 | info); | |
5994 | ||
b34976b6 | 5995 | return TRUE; |
252b5132 RH |
5996 | } |
5997 | ||
233cc9c1 L |
5998 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
5999 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
6000 | It has to be done before elf_link_sort_relocs is called so that | |
6001 | dynamic relocations are properly sorted. */ | |
6002 | ||
6003 | static bfd_boolean | |
6004 | elf_i386_output_arch_local_syms | |
6005 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
6006 | struct bfd_link_info *info, | |
6007 | void *flaginfo ATTRIBUTE_UNUSED, | |
6008 | int (*func) (void *, const char *, | |
6009 | Elf_Internal_Sym *, | |
6010 | asection *, | |
6011 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
6012 | { | |
6013 | struct elf_i386_link_hash_table *htab = elf_i386_hash_table (info); | |
6014 | if (htab == NULL) | |
6015 | return FALSE; | |
6016 | ||
6017 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
6018 | htab_traverse (htab->loc_hash_table, | |
6019 | elf_i386_finish_local_dynamic_symbol, | |
6020 | info); | |
6021 | ||
6022 | return TRUE; | |
6023 | } | |
6024 | ||
3972882e | 6025 | /* Return an array of PLT entry symbol values. */ |
4c45e5c9 | 6026 | |
3972882e L |
6027 | static bfd_vma * |
6028 | elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt, | |
6029 | asection *relplt) | |
4c45e5c9 | 6030 | { |
3972882e L |
6031 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
6032 | arelent *p; | |
6033 | long count, i; | |
6034 | bfd_vma *plt_sym_val; | |
144bed8d | 6035 | bfd_vma plt_offset; |
3972882e L |
6036 | bfd_byte *plt_contents; |
6037 | const struct elf_i386_backend_data *bed | |
6038 | = get_elf_i386_backend_data (abfd); | |
6039 | Elf_Internal_Shdr *hdr; | |
6040 | ||
6041 | /* Get the .plt section contents. */ | |
6042 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
6043 | if (plt_contents == NULL) | |
6044 | return NULL; | |
6045 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
6046 | plt_contents, 0, plt->size)) | |
6047 | { | |
6048 | bad_return: | |
6049 | free (plt_contents); | |
6050 | return NULL; | |
6051 | } | |
144bed8d | 6052 | |
3972882e L |
6053 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
6054 | if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) | |
6055 | goto bad_return; | |
144bed8d | 6056 | |
3972882e L |
6057 | hdr = &elf_section_data (relplt)->this_hdr; |
6058 | count = relplt->size / hdr->sh_entsize; | |
6059 | ||
6060 | plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count); | |
6061 | if (plt_sym_val == NULL) | |
6062 | goto bad_return; | |
cca5b8b6 | 6063 | |
35181b3e | 6064 | for (i = 0; i < count; i++) |
3972882e | 6065 | plt_sym_val[i] = -1; |
cca5b8b6 | 6066 | |
3972882e L |
6067 | plt_offset = bed->plt->plt_entry_size; |
6068 | p = relplt->relocation; | |
6069 | for (i = 0; i < count; i++, p++) | |
144bed8d | 6070 | { |
3972882e L |
6071 | long reloc_index; |
6072 | ||
6f25f223 | 6073 | /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */ |
533d0af0 | 6074 | if (p->howto == NULL) |
6f25f223 | 6075 | continue; |
533d0af0 L |
6076 | |
6077 | if (p->howto->type != R_386_JUMP_SLOT | |
6078 | && p->howto->type != R_386_IRELATIVE) | |
3972882e L |
6079 | continue; |
6080 | ||
6081 | reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset | |
6082 | + bed->plt->plt_reloc_offset)); | |
6083 | reloc_index /= sizeof (Elf32_External_Rel); | |
ec1f73bb AM |
6084 | if (reloc_index < count) |
6085 | plt_sym_val[reloc_index] = plt->vma + plt_offset; | |
6086 | ||
144bed8d | 6087 | plt_offset += bed->plt->plt_entry_size; |
fca6ae69 L |
6088 | |
6089 | /* PR binutils/18437: Skip extra relocations in the .rel.plt | |
6090 | section. */ | |
6091 | if (plt_offset >= plt->size) | |
6092 | break; | |
144bed8d L |
6093 | } |
6094 | ||
3972882e L |
6095 | free (plt_contents); |
6096 | ||
6097 | return plt_sym_val; | |
6098 | } | |
6099 | ||
6100 | /* Similar to _bfd_elf_get_synthetic_symtab. */ | |
6101 | ||
6102 | static long | |
6103 | elf_i386_get_synthetic_symtab (bfd *abfd, | |
6104 | long symcount, | |
6105 | asymbol **syms, | |
6106 | long dynsymcount, | |
6107 | asymbol **dynsyms, | |
6108 | asymbol **ret) | |
6109 | { | |
6110 | asection *plt = bfd_get_section_by_name (abfd, ".plt"); | |
6111 | return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms, | |
6112 | dynsymcount, dynsyms, ret, | |
6113 | plt, | |
6114 | elf_i386_get_plt_sym_val); | |
4c45e5c9 JJ |
6115 | } |
6116 | ||
fdc90cb4 JJ |
6117 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
6118 | ||
6119 | static bfd_boolean | |
6120 | elf_i386_hash_symbol (struct elf_link_hash_entry *h) | |
6121 | { | |
6122 | if (h->plt.offset != (bfd_vma) -1 | |
6123 | && !h->def_regular | |
6124 | && !h->pointer_equality_needed) | |
6125 | return FALSE; | |
6126 | ||
6127 | return _bfd_elf_hash_symbol (h); | |
6128 | } | |
4c45e5c9 | 6129 | |
6d00b590 | 6130 | #define TARGET_LITTLE_SYM i386_elf32_vec |
252b5132 RH |
6131 | #define TARGET_LITTLE_NAME "elf32-i386" |
6132 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 6133 | #define ELF_TARGET_ID I386_ELF_DATA |
252b5132 RH |
6134 | #define ELF_MACHINE_CODE EM_386 |
6135 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
6136 | |
6137 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 6138 | #define elf_backend_can_refcount 1 |
252b5132 RH |
6139 | #define elf_backend_want_got_plt 1 |
6140 | #define elf_backend_plt_readonly 1 | |
6141 | #define elf_backend_want_plt_sym 0 | |
6142 | #define elf_backend_got_header_size 12 | |
e41b3a13 | 6143 | #define elf_backend_plt_alignment 4 |
64f52338 | 6144 | #define elf_backend_dtrel_excludes_plt 1 |
f7483970 | 6145 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 6146 | #define elf_backend_caches_rawsize 1 |
5474d94f | 6147 | #define elf_backend_want_dynrelro 1 |
252b5132 | 6148 | |
8c29f035 AM |
6149 | /* Support RELA for objdump of prelink objects. */ |
6150 | #define elf_info_to_howto elf_i386_info_to_howto_rel | |
dd5724d5 AM |
6151 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel |
6152 | ||
13ae64f3 | 6153 | #define bfd_elf32_mkobject elf_i386_mkobject |
13ae64f3 | 6154 | |
dd5724d5 AM |
6155 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
6156 | #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create | |
6157 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup | |
13285a1b | 6158 | #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup |
3972882e | 6159 | #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab |
dd5724d5 AM |
6160 | |
6161 | #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol | |
13285a1b | 6162 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
dd5724d5 | 6163 | #define elf_backend_check_relocs elf_i386_check_relocs |
0ac8d2ca | 6164 | #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol |
6725bdbf | 6165 | #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections |
0ac8d2ca | 6166 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
6167 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
6168 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
233cc9c1 | 6169 | #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms |
dd5724d5 | 6170 | #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook |
c5fccbec DJ |
6171 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
6172 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 6173 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca AM |
6174 | #define elf_backend_relocate_section elf_i386_relocate_section |
6175 | #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections | |
67a4f2b7 | 6176 | #define elf_backend_always_size_sections elf_i386_always_size_sections |
74541ad4 AM |
6177 | #define elf_backend_omit_section_dynsym \ |
6178 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
fdc90cb4 | 6179 | #define elf_backend_hash_symbol elf_i386_hash_symbol |
aec6b87e | 6180 | #define elf_backend_fixup_symbol elf_i386_fixup_symbol |
dd5724d5 | 6181 | |
252b5132 | 6182 | #include "elf32-target.h" |
2bc3c89a AM |
6183 | |
6184 | /* FreeBSD support. */ | |
6185 | ||
6186 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6187 | #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec |
2bc3c89a AM |
6188 | #undef TARGET_LITTLE_NAME |
6189 | #define TARGET_LITTLE_NAME "elf32-i386-freebsd" | |
d1036acb L |
6190 | #undef ELF_OSABI |
6191 | #define ELF_OSABI ELFOSABI_FREEBSD | |
2bc3c89a AM |
6192 | |
6193 | /* The kernel recognizes executables as valid only if they carry a | |
6194 | "FreeBSD" label in the ELF header. So we put this label on all | |
6195 | executables and (for simplicity) also all other object files. */ | |
6196 | ||
2bc3c89a | 6197 | static void |
d8045f23 | 6198 | elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info) |
2bc3c89a | 6199 | { |
78245035 | 6200 | _bfd_elf_post_process_headers (abfd, info); |
2bc3c89a | 6201 | |
2bc3c89a | 6202 | #ifdef OLD_FREEBSD_ABI_LABEL |
cf7363b4 L |
6203 | { |
6204 | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ | |
6205 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
6206 | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); | |
6207 | } | |
caf47ea6 | 6208 | #endif |
2bc3c89a AM |
6209 | } |
6210 | ||
6211 | #undef elf_backend_post_process_headers | |
d8045f23 | 6212 | #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers |
571fe01f NC |
6213 | #undef elf32_bed |
6214 | #define elf32_bed elf32_i386_fbsd_bed | |
2bc3c89a | 6215 | |
d8045f23 NC |
6216 | #undef elf_backend_add_symbol_hook |
6217 | ||
2bc3c89a | 6218 | #include "elf32-target.h" |
eac338cf | 6219 | |
a6cc6b3b RO |
6220 | /* Solaris 2. */ |
6221 | ||
6222 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6223 | #define TARGET_LITTLE_SYM i386_elf32_sol2_vec |
a6cc6b3b RO |
6224 | #undef TARGET_LITTLE_NAME |
6225 | #define TARGET_LITTLE_NAME "elf32-i386-sol2" | |
6226 | ||
914082d1 L |
6227 | #undef elf_backend_post_process_headers |
6228 | ||
a6cc6b3b RO |
6229 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE |
6230 | objects won't be recognized. */ | |
6231 | #undef ELF_OSABI | |
6232 | ||
6233 | #undef elf32_bed | |
6234 | #define elf32_bed elf32_i386_sol2_bed | |
6235 | ||
7dc98aea RO |
6236 | /* The 32-bit static TLS arena size is rounded to the nearest 8-byte |
6237 | boundary. */ | |
84865015 | 6238 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
6239 | #define elf_backend_static_tls_alignment 8 |
6240 | ||
a6cc6b3b RO |
6241 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
6242 | ||
6243 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
6244 | File, p.63. */ | |
84865015 | 6245 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
6246 | #define elf_backend_want_plt_sym 1 |
6247 | ||
84865015 NC |
6248 | #undef elf_backend_strtab_flags |
6249 | #define elf_backend_strtab_flags SHF_STRINGS | |
6250 | ||
5522f910 NC |
6251 | /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which |
6252 | has a type >= SHT_LOOS. Returns TRUE if these fields were initialised | |
6253 | FALSE otherwise. ISECTION is the best guess matching section from the | |
6254 | input bfd IBFD, but it might be NULL. */ | |
6255 | ||
84865015 | 6256 | static bfd_boolean |
5522f910 NC |
6257 | elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
6258 | bfd *obfd ATTRIBUTE_UNUSED, | |
6259 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
6260 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
6261 | { |
6262 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
5522f910 NC |
6263 | and sh_link fields of Solaris specific section types. */ |
6264 | return FALSE; | |
84865015 | 6265 | |
5522f910 | 6266 | /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13, |
84865015 NC |
6267 | Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation: |
6268 | ||
6269 | http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc | |
6270 | ||
6271 | The following values should be set: | |
6272 | ||
6273 | Type Link Info | |
6274 | ----------------------------------------------------------------------------- | |
6275 | SHT_SUNW_ancillary The section header index of 0 | |
6276 | [0x6fffffee] the associated string table. | |
6277 | ||
6278 | SHT_SUNW_capinfo The section header index of For a dynamic object, the | |
6279 | [0x6ffffff0] the associated symbol table. section header index of | |
6280 | the associated | |
6281 | SHT_SUNW_capchain table, | |
6282 | otherwise 0. | |
6283 | ||
6284 | SHT_SUNW_symsort The section header index of 0 | |
6285 | [0x6ffffff1] the associated symbol table. | |
6286 | ||
6287 | SHT_SUNW_tlssort The section header index of 0 | |
6288 | [0x6ffffff2] the associated symbol table. | |
6289 | ||
6290 | SHT_SUNW_LDYNSYM The section header index of One greater than the | |
6291 | [0x6ffffff3] the associated string table. symbol table index of the | |
6292 | This index is the same string last local symbol, | |
6293 | table used by the SHT_DYNSYM STB_LOCAL. Since | |
6294 | section. SHT_SUNW_LDYNSYM only | |
6295 | contains local symbols, | |
6296 | sh_info is equivalent to | |
6297 | the number of symbols in | |
6298 | the table. | |
6299 | ||
6300 | SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer | |
6301 | [0x6ffffff5] the section header index of to named strings, the | |
6302 | the associated section header index of | |
6303 | SHT_SUNW_capinfo table, the associated string | |
6304 | otherwise 0. table, otherwise 0. | |
6305 | ||
6306 | SHT_SUNW_move The section header index of 0 | |
6307 | [0x6ffffffa] the associated symbol table. | |
6308 | ||
6309 | SHT_SUNW_COMDAT 0 0 | |
6310 | [0x6ffffffb] | |
6311 | ||
6312 | SHT_SUNW_syminfo The section header index of The section header index | |
6313 | [0x6ffffffc] the associated symbol table. of the associated | |
6314 | .dynamic section. | |
6315 | ||
6316 | SHT_SUNW_verdef The section header index of The number of version | |
6317 | [0x6ffffffd] the associated string table. definitions within the | |
6318 | section. | |
6319 | ||
6320 | SHT_SUNW_verneed The section header index of The number of version | |
6321 | [0x6ffffffe] the associated string table. dependencies within the | |
6322 | section. | |
6323 | ||
6324 | SHT_SUNW_versym The section header index of 0 | |
6325 | [0x6fffffff] the associated symbol table. */ | |
84865015 NC |
6326 | } |
6327 | ||
5522f910 NC |
6328 | #undef elf_backend_copy_special_section_fields |
6329 | #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields | |
84865015 | 6330 | |
a6cc6b3b RO |
6331 | #include "elf32-target.h" |
6332 | ||
bf64a951 L |
6333 | /* Intel MCU support. */ |
6334 | ||
6335 | static bfd_boolean | |
6336 | elf32_iamcu_elf_object_p (bfd *abfd) | |
6337 | { | |
6338 | /* Set the right machine number for an IAMCU elf32 file. */ | |
6339 | bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu); | |
6340 | return TRUE; | |
6341 | } | |
6342 | ||
6343 | #undef TARGET_LITTLE_SYM | |
6344 | #define TARGET_LITTLE_SYM iamcu_elf32_vec | |
6345 | #undef TARGET_LITTLE_NAME | |
6346 | #define TARGET_LITTLE_NAME "elf32-iamcu" | |
84865015 | 6347 | #undef ELF_ARCH |
bf64a951 L |
6348 | #define ELF_ARCH bfd_arch_iamcu |
6349 | ||
6350 | #undef ELF_MACHINE_CODE | |
6351 | #define ELF_MACHINE_CODE EM_IAMCU | |
6352 | ||
6353 | #undef ELF_OSABI | |
6354 | ||
6355 | #undef elf32_bed | |
6356 | #define elf32_bed elf32_iamcu_bed | |
6357 | ||
6358 | #undef elf_backend_object_p | |
6359 | #define elf_backend_object_p elf32_iamcu_elf_object_p | |
6360 | ||
6361 | #undef elf_backend_static_tls_alignment | |
6362 | ||
6363 | #undef elf_backend_want_plt_sym | |
6364 | #define elf_backend_want_plt_sym 0 | |
6365 | ||
84865015 | 6366 | #undef elf_backend_strtab_flags |
5522f910 | 6367 | #undef elf_backend_copy_special_section_fields |
84865015 | 6368 | |
bf64a951 L |
6369 | #include "elf32-target.h" |
6370 | ||
6371 | /* Restore defaults. */ | |
6372 | #undef ELF_ARCH | |
6373 | #define ELF_ARCH bfd_arch_i386 | |
6374 | #undef ELF_MACHINE_CODE | |
6375 | #define ELF_MACHINE_CODE EM_386 | |
6376 | ||
a27e4371 RM |
6377 | /* Native Client support. */ |
6378 | ||
6379 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6380 | #define TARGET_LITTLE_SYM i386_elf32_nacl_vec |
a27e4371 RM |
6381 | #undef TARGET_LITTLE_NAME |
6382 | #define TARGET_LITTLE_NAME "elf32-i386-nacl" | |
6383 | #undef elf32_bed | |
6384 | #define elf32_bed elf32_i386_nacl_bed | |
6385 | ||
6386 | #undef ELF_MAXPAGESIZE | |
6387 | #define ELF_MAXPAGESIZE 0x10000 | |
6388 | ||
6389 | /* Restore defaults. */ | |
6390 | #undef ELF_OSABI | |
6391 | #undef elf_backend_want_plt_sym | |
6392 | #define elf_backend_want_plt_sym 0 | |
6393 | #undef elf_backend_post_process_headers | |
a27e4371 RM |
6394 | #undef elf_backend_static_tls_alignment |
6395 | ||
6396 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
6397 | ||
6398 | #undef elf_backend_plt_alignment | |
6399 | #define elf_backend_plt_alignment 5 | |
6400 | #define NACL_PLT_ENTRY_SIZE 64 | |
6401 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
6402 | ||
6403 | static const bfd_byte elf_i386_nacl_plt0_entry[] = | |
6404 | { | |
6405 | 0xff, 0x35, /* pushl contents of address */ | |
6406 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
6407 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
6408 | 0, 0, 0, 0, /* replaced with address of .got + 8. */ | |
6409 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
6410 | 0xff, 0xe1 /* jmp *%ecx */ | |
6411 | }; | |
6412 | ||
6413 | static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6414 | { | |
6415 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
6416 | 0, 0, 0, 0, /* replaced with GOT slot address. */ | |
6417 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
6418 | 0xff, 0xe1, /* jmp *%ecx */ | |
6419 | ||
6420 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6421 | 0x90, | |
6422 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6423 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6424 | ||
6425 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6426 | 0x68, /* pushl immediate */ | |
6427 | 0, 0, 0, 0, /* replaced with reloc offset. */ | |
6428 | 0xe9, /* jmp relative */ | |
6429 | 0, 0, 0, 0, /* replaced with offset to .plt. */ | |
6430 | ||
6431 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6432 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6433 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6434 | 0x90, 0x90 | |
6435 | }; | |
6436 | ||
6437 | static const bfd_byte | |
6438 | elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] = | |
6439 | { | |
6440 | 0xff, 0x73, 0x04, /* pushl 4(%ebx) */ | |
6441 | 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */ | |
6442 | 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */ | |
6443 | 0xff, 0xe1, /* jmp *%ecx */ | |
caa0075c RM |
6444 | |
6445 | /* This is expected to be the same size as elf_i386_nacl_plt0_entry, | |
6446 | so pad to that size with nop instructions. */ | |
6447 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 | |
a27e4371 RM |
6448 | }; |
6449 | ||
6450 | static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6451 | { | |
6452 | 0x8b, 0x8b, /* movl offset(%ebx), %ecx */ | |
6453 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
6454 | 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */ | |
6455 | 0xff, 0xe1, /* jmp *%ecx */ | |
6456 | ||
6457 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6458 | 0x90, | |
6459 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6460 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6461 | ||
6462 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6463 | 0x68, /* pushl immediate */ | |
6464 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
6465 | 0xe9, /* jmp relative */ | |
6466 | 0, 0, 0, 0, /* replaced with offset to start of .plt. */ | |
6467 | ||
6468 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6469 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6470 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6471 | 0x90, 0x90 | |
6472 | }; | |
6473 | ||
6474 | static const bfd_byte elf_i386_nacl_eh_frame_plt[] = | |
6475 | { | |
6476 | #if (PLT_CIE_LENGTH != 20 \ | |
6477 | || PLT_FDE_LENGTH != 36 \ | |
6478 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
6479 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
6480 | # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!" | |
6481 | #endif | |
6482 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
6483 | 0, 0, 0, 0, /* CIE ID */ | |
6484 | 1, /* CIE version */ | |
6485 | 'z', 'R', 0, /* Augmentation string */ | |
6486 | 1, /* Code alignment factor */ | |
6487 | 0x7c, /* Data alignment factor: -4 */ | |
6488 | 8, /* Return address column */ | |
6489 | 1, /* Augmentation size */ | |
6490 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
6491 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
6492 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
6493 | DW_CFA_nop, DW_CFA_nop, | |
6494 | ||
6495 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
6496 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
6497 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
6498 | 0, 0, 0, 0, /* .plt size goes here */ | |
6499 | 0, /* Augmentation size */ | |
6500 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
6501 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
6502 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
6503 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
6504 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
6505 | 13, /* Block length */ | |
6506 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
6507 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
6508 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
6509 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, | |
6510 | DW_CFA_nop, DW_CFA_nop | |
6511 | }; | |
6512 | ||
6513 | static const struct elf_i386_plt_layout elf_i386_nacl_plt = | |
6514 | { | |
6515 | elf_i386_nacl_plt0_entry, /* plt0_entry */ | |
6516 | sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */ | |
6517 | 2, /* plt0_got1_offset */ | |
6518 | 8, /* plt0_got2_offset */ | |
6519 | elf_i386_nacl_plt_entry, /* plt_entry */ | |
6520 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
6521 | 2, /* plt_got_offset */ | |
6522 | 33, /* plt_reloc_offset */ | |
6523 | 38, /* plt_plt_offset */ | |
6524 | 32, /* plt_lazy_offset */ | |
6525 | elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */ | |
6526 | elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */ | |
6527 | elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */ | |
6528 | sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */ | |
fff53dae L |
6529 | NULL, /* eh_frame_plt_got */ |
6530 | 0, /* eh_frame_plt_got_size */ | |
a27e4371 RM |
6531 | }; |
6532 | ||
6533 | static const struct elf_i386_backend_data elf_i386_nacl_arch_bed = | |
6534 | { | |
6535 | &elf_i386_nacl_plt, /* plt */ | |
6536 | 0x90, /* plt0_pad_byte: nop insn */ | |
6537 | 0, /* is_vxworks */ | |
6538 | }; | |
6539 | ||
64b384e1 RM |
6540 | static bfd_boolean |
6541 | elf32_i386_nacl_elf_object_p (bfd *abfd) | |
6542 | { | |
6543 | /* Set the right machine number for a NaCl i386 ELF32 file. */ | |
6544 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl); | |
6545 | return TRUE; | |
6546 | } | |
6547 | ||
a27e4371 RM |
6548 | #undef elf_backend_arch_data |
6549 | #define elf_backend_arch_data &elf_i386_nacl_arch_bed | |
6550 | ||
64b384e1 RM |
6551 | #undef elf_backend_object_p |
6552 | #define elf_backend_object_p elf32_i386_nacl_elf_object_p | |
5a68afcf RM |
6553 | #undef elf_backend_modify_segment_map |
6554 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
6555 | #undef elf_backend_modify_program_headers | |
6556 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
6557 | #undef elf_backend_final_write_processing |
6558 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 6559 | |
a27e4371 RM |
6560 | #include "elf32-target.h" |
6561 | ||
5a68afcf | 6562 | /* Restore defaults. */ |
64b384e1 | 6563 | #undef elf_backend_object_p |
5a68afcf RM |
6564 | #undef elf_backend_modify_segment_map |
6565 | #undef elf_backend_modify_program_headers | |
887badb3 | 6566 | #undef elf_backend_final_write_processing |
5a68afcf | 6567 | |
eac338cf PB |
6568 | /* VxWorks support. */ |
6569 | ||
6570 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6571 | #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec |
eac338cf PB |
6572 | #undef TARGET_LITTLE_NAME |
6573 | #define TARGET_LITTLE_NAME "elf32-i386-vxworks" | |
d1036acb | 6574 | #undef ELF_OSABI |
a27e4371 RM |
6575 | #undef elf_backend_plt_alignment |
6576 | #define elf_backend_plt_alignment 4 | |
eac338cf | 6577 | |
23209a78 RM |
6578 | static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed = |
6579 | { | |
25e762b9 | 6580 | &elf_i386_plt, /* plt */ |
23209a78 RM |
6581 | 0x90, /* plt0_pad_byte */ |
6582 | 1, /* is_vxworks */ | |
6583 | }; | |
eac338cf | 6584 | |
23209a78 RM |
6585 | #undef elf_backend_arch_data |
6586 | #define elf_backend_arch_data &elf_i386_vxworks_arch_bed | |
eac338cf | 6587 | |
13285a1b | 6588 | #undef elf_backend_relocs_compatible |
eac338cf PB |
6589 | #undef elf_backend_add_symbol_hook |
6590 | #define elf_backend_add_symbol_hook \ | |
6591 | elf_vxworks_add_symbol_hook | |
6592 | #undef elf_backend_link_output_symbol_hook | |
6593 | #define elf_backend_link_output_symbol_hook \ | |
9c72ff84 | 6594 | elf_vxworks_link_output_symbol_hook |
eac338cf PB |
6595 | #undef elf_backend_emit_relocs |
6596 | #define elf_backend_emit_relocs elf_vxworks_emit_relocs | |
6597 | #undef elf_backend_final_write_processing | |
6598 | #define elf_backend_final_write_processing \ | |
6599 | elf_vxworks_final_write_processing | |
7dc98aea | 6600 | #undef elf_backend_static_tls_alignment |
eac338cf PB |
6601 | |
6602 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so | |
6603 | define it. */ | |
6604 | #undef elf_backend_want_plt_sym | |
6605 | #define elf_backend_want_plt_sym 1 | |
6606 | ||
6607 | #undef elf32_bed | |
6608 | #define elf32_bed elf32_i386_vxworks_bed | |
6609 | ||
6610 | #include "elf32-target.h" |