Commit | Line | Data |
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252b5132 | 1 | /* Intel 80386/80486-specific support for 32-bit ELF |
6f2750fe | 2 | Copyright (C) 1993-2016 Free Software Foundation, Inc. |
252b5132 | 3 | |
571fe01f | 4 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 5 | |
571fe01f NC |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 8 | the Free Software Foundation; either version 3 of the License, or |
571fe01f | 9 | (at your option) any later version. |
252b5132 | 10 | |
571fe01f NC |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
252b5132 | 15 | |
571fe01f NC |
16 | You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
19 | MA 02110-1301, USA. */ | |
252b5132 | 20 | |
252b5132 | 21 | #include "sysdep.h" |
3db64b00 | 22 | #include "bfd.h" |
252b5132 RH |
23 | #include "bfdlink.h" |
24 | #include "libbfd.h" | |
25 | #include "elf-bfd.h" | |
5a68afcf | 26 | #include "elf-nacl.h" |
eac338cf | 27 | #include "elf-vxworks.h" |
142411ca | 28 | #include "bfd_stdint.h" |
c25bc9fc L |
29 | #include "objalloc.h" |
30 | #include "hashtab.h" | |
e41b3a13 | 31 | #include "dwarf2.h" |
02a86693 | 32 | #include "opcode/i386.h" |
252b5132 | 33 | |
55fd94b0 AM |
34 | /* 386 uses REL relocations instead of RELA. */ |
35 | #define USE_REL 1 | |
252b5132 RH |
36 | |
37 | #include "elf/i386.h" | |
38 | ||
39 | static reloc_howto_type elf_howto_table[]= | |
40 | { | |
6346d5ca | 41 | HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont, |
1b452ec6 | 42 | bfd_elf_generic_reloc, "R_386_NONE", |
b34976b6 AM |
43 | TRUE, 0x00000000, 0x00000000, FALSE), |
44 | HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 45 | bfd_elf_generic_reloc, "R_386_32", |
b34976b6 AM |
46 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
47 | HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 48 | bfd_elf_generic_reloc, "R_386_PC32", |
b34976b6 AM |
49 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
50 | HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 51 | bfd_elf_generic_reloc, "R_386_GOT32", |
b34976b6 AM |
52 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
53 | HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 54 | bfd_elf_generic_reloc, "R_386_PLT32", |
b34976b6 AM |
55 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
56 | HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 57 | bfd_elf_generic_reloc, "R_386_COPY", |
b34976b6 AM |
58 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
59 | HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 60 | bfd_elf_generic_reloc, "R_386_GLOB_DAT", |
b34976b6 AM |
61 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
62 | HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 63 | bfd_elf_generic_reloc, "R_386_JUMP_SLOT", |
b34976b6 AM |
64 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
65 | HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 66 | bfd_elf_generic_reloc, "R_386_RELATIVE", |
b34976b6 AM |
67 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
68 | HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 69 | bfd_elf_generic_reloc, "R_386_GOTOFF", |
b34976b6 AM |
70 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
71 | HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 72 | bfd_elf_generic_reloc, "R_386_GOTPC", |
b34976b6 | 73 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
1b452ec6 | 74 | |
dc47f327 AM |
75 | /* We have a gap in the reloc numbers here. |
76 | R_386_standard counts the number up to this point, and | |
77 | R_386_ext_offset is the value to subtract from a reloc type of | |
78 | R_386_16 thru R_386_PC8 to form an index into this table. */ | |
55fd94b0 AM |
79 | #define R_386_standard (R_386_GOTPC + 1) |
80 | #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard) | |
1b452ec6 | 81 | |
37e55690 | 82 | /* These relocs are a GNU extension. */ |
b34976b6 | 83 | HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
37e55690 | 84 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF", |
b34976b6 AM |
85 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
86 | HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 87 | bfd_elf_generic_reloc, "R_386_TLS_IE", |
b34976b6 AM |
88 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
89 | HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 90 | bfd_elf_generic_reloc, "R_386_TLS_GOTIE", |
b34976b6 AM |
91 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
92 | HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 93 | bfd_elf_generic_reloc, "R_386_TLS_LE", |
b34976b6 AM |
94 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
95 | HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 96 | bfd_elf_generic_reloc, "R_386_TLS_GD", |
b34976b6 AM |
97 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
98 | HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 99 | bfd_elf_generic_reloc, "R_386_TLS_LDM", |
b34976b6 AM |
100 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
101 | HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 102 | bfd_elf_generic_reloc, "R_386_16", |
b34976b6 | 103 | TRUE, 0xffff, 0xffff, FALSE), |
b0360d8c | 104 | HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
1b452ec6 | 105 | bfd_elf_generic_reloc, "R_386_PC16", |
b34976b6 AM |
106 | TRUE, 0xffff, 0xffff, TRUE), |
107 | HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 108 | bfd_elf_generic_reloc, "R_386_8", |
b34976b6 AM |
109 | TRUE, 0xff, 0xff, FALSE), |
110 | HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
1b452ec6 | 111 | bfd_elf_generic_reloc, "R_386_PC8", |
b34976b6 | 112 | TRUE, 0xff, 0xff, TRUE), |
dc47f327 | 113 | |
55fd94b0 AM |
114 | #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset) |
115 | #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext) | |
13ae64f3 | 116 | /* These are common with Solaris TLS implementation. */ |
b34976b6 | 117 | HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
13ae64f3 | 118 | bfd_elf_generic_reloc, "R_386_TLS_LDO_32", |
b34976b6 AM |
119 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
120 | HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 121 | bfd_elf_generic_reloc, "R_386_TLS_IE_32", |
b34976b6 AM |
122 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
123 | HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 124 | bfd_elf_generic_reloc, "R_386_TLS_LE_32", |
b34976b6 AM |
125 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
126 | HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 127 | bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32", |
b34976b6 AM |
128 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
129 | HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 130 | bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32", |
b34976b6 AM |
131 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
132 | HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 133 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF32", |
b34976b6 | 134 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
1788fc08 L |
135 | HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, |
136 | bfd_elf_generic_reloc, "R_386_SIZE32", | |
137 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
67a4f2b7 AO |
138 | HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
139 | bfd_elf_generic_reloc, "R_386_TLS_GOTDESC", | |
140 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
141 | HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
142 | bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL", | |
143 | FALSE, 0, 0, FALSE), | |
144 | HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
145 | bfd_elf_generic_reloc, "R_386_TLS_DESC", | |
146 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
cbe950e9 L |
147 | HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
148 | bfd_elf_generic_reloc, "R_386_IRELATIVE", | |
149 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
02a86693 L |
150 | HOWTO(R_386_GOT32X, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
151 | bfd_elf_generic_reloc, "R_386_GOT32X", | |
152 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
13ae64f3 JJ |
153 | |
154 | /* Another gap. */ | |
02a86693 | 155 | #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset) |
c74be520 | 156 | #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2) |
252b5132 RH |
157 | |
158 | /* GNU extension to record C++ vtable hierarchy. */ | |
252b5132 RH |
159 | HOWTO (R_386_GNU_VTINHERIT, /* type */ |
160 | 0, /* rightshift */ | |
161 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
162 | 0, /* bitsize */ | |
b34976b6 | 163 | FALSE, /* pc_relative */ |
252b5132 RH |
164 | 0, /* bitpos */ |
165 | complain_overflow_dont, /* complain_on_overflow */ | |
166 | NULL, /* special_function */ | |
167 | "R_386_GNU_VTINHERIT", /* name */ | |
b34976b6 | 168 | FALSE, /* partial_inplace */ |
252b5132 RH |
169 | 0, /* src_mask */ |
170 | 0, /* dst_mask */ | |
b34976b6 | 171 | FALSE), /* pcrel_offset */ |
252b5132 RH |
172 | |
173 | /* GNU extension to record C++ vtable member usage. */ | |
252b5132 RH |
174 | HOWTO (R_386_GNU_VTENTRY, /* type */ |
175 | 0, /* rightshift */ | |
176 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
177 | 0, /* bitsize */ | |
b34976b6 | 178 | FALSE, /* pc_relative */ |
252b5132 RH |
179 | 0, /* bitpos */ |
180 | complain_overflow_dont, /* complain_on_overflow */ | |
181 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
182 | "R_386_GNU_VTENTRY", /* name */ | |
b34976b6 | 183 | FALSE, /* partial_inplace */ |
252b5132 RH |
184 | 0, /* src_mask */ |
185 | 0, /* dst_mask */ | |
b34976b6 | 186 | FALSE) /* pcrel_offset */ |
dc47f327 | 187 | |
55fd94b0 | 188 | #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset) |
dc47f327 AM |
189 | |
190 | }; | |
191 | ||
252b5132 | 192 | #ifdef DEBUG_GEN_RELOC |
55fd94b0 AM |
193 | #define TRACE(str) \ |
194 | fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str) | |
252b5132 RH |
195 | #else |
196 | #define TRACE(str) | |
197 | #endif | |
198 | ||
199 | static reloc_howto_type * | |
55fd94b0 AM |
200 | elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
201 | bfd_reloc_code_real_type code) | |
252b5132 RH |
202 | { |
203 | switch (code) | |
204 | { | |
205 | case BFD_RELOC_NONE: | |
206 | TRACE ("BFD_RELOC_NONE"); | |
55fd94b0 | 207 | return &elf_howto_table[R_386_NONE]; |
252b5132 RH |
208 | |
209 | case BFD_RELOC_32: | |
210 | TRACE ("BFD_RELOC_32"); | |
55fd94b0 | 211 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
212 | |
213 | case BFD_RELOC_CTOR: | |
214 | TRACE ("BFD_RELOC_CTOR"); | |
55fd94b0 | 215 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
216 | |
217 | case BFD_RELOC_32_PCREL: | |
218 | TRACE ("BFD_RELOC_PC32"); | |
55fd94b0 | 219 | return &elf_howto_table[R_386_PC32]; |
252b5132 RH |
220 | |
221 | case BFD_RELOC_386_GOT32: | |
222 | TRACE ("BFD_RELOC_386_GOT32"); | |
55fd94b0 | 223 | return &elf_howto_table[R_386_GOT32]; |
252b5132 RH |
224 | |
225 | case BFD_RELOC_386_PLT32: | |
226 | TRACE ("BFD_RELOC_386_PLT32"); | |
55fd94b0 | 227 | return &elf_howto_table[R_386_PLT32]; |
252b5132 RH |
228 | |
229 | case BFD_RELOC_386_COPY: | |
230 | TRACE ("BFD_RELOC_386_COPY"); | |
55fd94b0 | 231 | return &elf_howto_table[R_386_COPY]; |
252b5132 RH |
232 | |
233 | case BFD_RELOC_386_GLOB_DAT: | |
234 | TRACE ("BFD_RELOC_386_GLOB_DAT"); | |
55fd94b0 | 235 | return &elf_howto_table[R_386_GLOB_DAT]; |
252b5132 RH |
236 | |
237 | case BFD_RELOC_386_JUMP_SLOT: | |
238 | TRACE ("BFD_RELOC_386_JUMP_SLOT"); | |
55fd94b0 | 239 | return &elf_howto_table[R_386_JUMP_SLOT]; |
252b5132 RH |
240 | |
241 | case BFD_RELOC_386_RELATIVE: | |
242 | TRACE ("BFD_RELOC_386_RELATIVE"); | |
55fd94b0 | 243 | return &elf_howto_table[R_386_RELATIVE]; |
252b5132 RH |
244 | |
245 | case BFD_RELOC_386_GOTOFF: | |
246 | TRACE ("BFD_RELOC_386_GOTOFF"); | |
55fd94b0 | 247 | return &elf_howto_table[R_386_GOTOFF]; |
252b5132 RH |
248 | |
249 | case BFD_RELOC_386_GOTPC: | |
250 | TRACE ("BFD_RELOC_386_GOTPC"); | |
55fd94b0 | 251 | return &elf_howto_table[R_386_GOTPC]; |
252b5132 | 252 | |
37e55690 JJ |
253 | /* These relocs are a GNU extension. */ |
254 | case BFD_RELOC_386_TLS_TPOFF: | |
255 | TRACE ("BFD_RELOC_386_TLS_TPOFF"); | |
55fd94b0 | 256 | return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset]; |
37e55690 JJ |
257 | |
258 | case BFD_RELOC_386_TLS_IE: | |
259 | TRACE ("BFD_RELOC_386_TLS_IE"); | |
55fd94b0 | 260 | return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset]; |
37e55690 JJ |
261 | |
262 | case BFD_RELOC_386_TLS_GOTIE: | |
263 | TRACE ("BFD_RELOC_386_TLS_GOTIE"); | |
55fd94b0 | 264 | return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset]; |
37e55690 | 265 | |
13ae64f3 JJ |
266 | case BFD_RELOC_386_TLS_LE: |
267 | TRACE ("BFD_RELOC_386_TLS_LE"); | |
55fd94b0 | 268 | return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset]; |
13ae64f3 JJ |
269 | |
270 | case BFD_RELOC_386_TLS_GD: | |
271 | TRACE ("BFD_RELOC_386_TLS_GD"); | |
55fd94b0 | 272 | return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset]; |
13ae64f3 JJ |
273 | |
274 | case BFD_RELOC_386_TLS_LDM: | |
275 | TRACE ("BFD_RELOC_386_TLS_LDM"); | |
55fd94b0 | 276 | return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset]; |
13ae64f3 | 277 | |
252b5132 RH |
278 | case BFD_RELOC_16: |
279 | TRACE ("BFD_RELOC_16"); | |
55fd94b0 | 280 | return &elf_howto_table[R_386_16 - R_386_ext_offset]; |
252b5132 RH |
281 | |
282 | case BFD_RELOC_16_PCREL: | |
283 | TRACE ("BFD_RELOC_16_PCREL"); | |
55fd94b0 | 284 | return &elf_howto_table[R_386_PC16 - R_386_ext_offset]; |
252b5132 RH |
285 | |
286 | case BFD_RELOC_8: | |
287 | TRACE ("BFD_RELOC_8"); | |
55fd94b0 | 288 | return &elf_howto_table[R_386_8 - R_386_ext_offset]; |
252b5132 RH |
289 | |
290 | case BFD_RELOC_8_PCREL: | |
291 | TRACE ("BFD_RELOC_8_PCREL"); | |
55fd94b0 | 292 | return &elf_howto_table[R_386_PC8 - R_386_ext_offset]; |
252b5132 | 293 | |
13ae64f3 JJ |
294 | /* Common with Sun TLS implementation. */ |
295 | case BFD_RELOC_386_TLS_LDO_32: | |
296 | TRACE ("BFD_RELOC_386_TLS_LDO_32"); | |
55fd94b0 | 297 | return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset]; |
13ae64f3 JJ |
298 | |
299 | case BFD_RELOC_386_TLS_IE_32: | |
300 | TRACE ("BFD_RELOC_386_TLS_IE_32"); | |
55fd94b0 | 301 | return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
302 | |
303 | case BFD_RELOC_386_TLS_LE_32: | |
304 | TRACE ("BFD_RELOC_386_TLS_LE_32"); | |
55fd94b0 | 305 | return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
306 | |
307 | case BFD_RELOC_386_TLS_DTPMOD32: | |
308 | TRACE ("BFD_RELOC_386_TLS_DTPMOD32"); | |
55fd94b0 | 309 | return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset]; |
13ae64f3 JJ |
310 | |
311 | case BFD_RELOC_386_TLS_DTPOFF32: | |
312 | TRACE ("BFD_RELOC_386_TLS_DTPOFF32"); | |
55fd94b0 | 313 | return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset]; |
13ae64f3 JJ |
314 | |
315 | case BFD_RELOC_386_TLS_TPOFF32: | |
316 | TRACE ("BFD_RELOC_386_TLS_TPOFF32"); | |
55fd94b0 | 317 | return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset]; |
13ae64f3 | 318 | |
1788fc08 L |
319 | case BFD_RELOC_SIZE32: |
320 | TRACE ("BFD_RELOC_SIZE32"); | |
321 | return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset]; | |
322 | ||
67a4f2b7 AO |
323 | case BFD_RELOC_386_TLS_GOTDESC: |
324 | TRACE ("BFD_RELOC_386_TLS_GOTDESC"); | |
325 | return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset]; | |
326 | ||
327 | case BFD_RELOC_386_TLS_DESC_CALL: | |
328 | TRACE ("BFD_RELOC_386_TLS_DESC_CALL"); | |
329 | return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset]; | |
330 | ||
331 | case BFD_RELOC_386_TLS_DESC: | |
332 | TRACE ("BFD_RELOC_386_TLS_DESC"); | |
333 | return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset]; | |
334 | ||
cbe950e9 L |
335 | case BFD_RELOC_386_IRELATIVE: |
336 | TRACE ("BFD_RELOC_386_IRELATIVE"); | |
2a750708 | 337 | return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset]; |
cbe950e9 | 338 | |
02a86693 L |
339 | case BFD_RELOC_386_GOT32X: |
340 | TRACE ("BFD_RELOC_386_GOT32X"); | |
341 | return &elf_howto_table[R_386_GOT32X - R_386_tls_offset]; | |
342 | ||
252b5132 RH |
343 | case BFD_RELOC_VTABLE_INHERIT: |
344 | TRACE ("BFD_RELOC_VTABLE_INHERIT"); | |
55fd94b0 | 345 | return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset]; |
252b5132 RH |
346 | |
347 | case BFD_RELOC_VTABLE_ENTRY: | |
348 | TRACE ("BFD_RELOC_VTABLE_ENTRY"); | |
55fd94b0 | 349 | return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset]; |
252b5132 RH |
350 | |
351 | default: | |
352 | break; | |
353 | } | |
354 | ||
355 | TRACE ("Unknown"); | |
356 | return 0; | |
357 | } | |
358 | ||
157090f7 AM |
359 | static reloc_howto_type * |
360 | elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
361 | const char *r_name) | |
362 | { | |
363 | unsigned int i; | |
364 | ||
365 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) | |
366 | if (elf_howto_table[i].name != NULL | |
367 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) | |
368 | return &elf_howto_table[i]; | |
369 | ||
370 | return NULL; | |
371 | } | |
372 | ||
142411ca L |
373 | static reloc_howto_type * |
374 | elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type) | |
252b5132 | 375 | { |
dc47f327 AM |
376 | unsigned int indx; |
377 | ||
378 | if ((indx = r_type) >= R_386_standard | |
379 | && ((indx = r_type - R_386_ext_offset) - R_386_standard | |
380 | >= R_386_ext - R_386_standard) | |
13ae64f3 | 381 | && ((indx = r_type - R_386_tls_offset) - R_386_ext |
c74be520 L |
382 | >= R_386_ext2 - R_386_ext) |
383 | && ((indx = r_type - R_386_vt_offset) - R_386_ext2 | |
384 | >= R_386_vt - R_386_ext2)) | |
252b5132 | 385 | { |
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 | ||
25e762b9 RM |
651 | struct elf_i386_plt_layout |
652 | { | |
653 | /* The first entry in an absolute procedure linkage table looks like this. */ | |
654 | const bfd_byte *plt0_entry; | |
655 | unsigned int plt0_entry_size; | |
656 | ||
657 | /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */ | |
658 | unsigned int plt0_got1_offset; | |
659 | unsigned int plt0_got2_offset; | |
660 | ||
661 | /* Later entries in an absolute procedure linkage table look like this. */ | |
662 | const bfd_byte *plt_entry; | |
663 | unsigned int plt_entry_size; | |
664 | ||
665 | /* Offsets into plt_entry that are to be replaced with... */ | |
666 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
667 | unsigned int plt_reloc_offset; /* ... offset into relocation table. */ | |
668 | unsigned int plt_plt_offset; /* ... offset to start of .plt. */ | |
669 | ||
670 | /* Offset into plt_entry where the initial value of the GOT entry points. */ | |
671 | unsigned int plt_lazy_offset; | |
672 | ||
673 | /* The first entry in a PIC procedure linkage table looks like this. */ | |
674 | const bfd_byte *pic_plt0_entry; | |
675 | ||
676 | /* Subsequent entries in a PIC procedure linkage table look like this. */ | |
677 | const bfd_byte *pic_plt_entry; | |
678 | ||
679 | /* .eh_frame covering the .plt section. */ | |
680 | const bfd_byte *eh_frame_plt; | |
681 | unsigned int eh_frame_plt_size; | |
682 | }; | |
683 | ||
684 | #define GET_PLT_ENTRY_SIZE(abfd) \ | |
685 | get_elf_i386_backend_data (abfd)->plt->plt_entry_size | |
686 | ||
687 | /* These are the standard parameters. */ | |
688 | static const struct elf_i386_plt_layout elf_i386_plt = | |
689 | { | |
690 | elf_i386_plt0_entry, /* plt0_entry */ | |
691 | sizeof (elf_i386_plt0_entry), /* plt0_entry_size */ | |
692 | 2, /* plt0_got1_offset */ | |
693 | 8, /* plt0_got2_offset */ | |
694 | elf_i386_plt_entry, /* plt_entry */ | |
695 | PLT_ENTRY_SIZE, /* plt_entry_size */ | |
696 | 2, /* plt_got_offset */ | |
697 | 7, /* plt_reloc_offset */ | |
698 | 12, /* plt_plt_offset */ | |
699 | 6, /* plt_lazy_offset */ | |
700 | elf_i386_pic_plt0_entry, /* pic_plt0_entry */ | |
701 | elf_i386_pic_plt_entry, /* pic_plt_entry */ | |
702 | elf_i386_eh_frame_plt, /* eh_frame_plt */ | |
703 | sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */ | |
704 | }; | |
705 | \f | |
706 | ||
eac338cf PB |
707 | /* On VxWorks, the .rel.plt.unloaded section has absolute relocations |
708 | for the PLTResolve stub and then for each PLT entry. */ | |
709 | #define PLTRESOLVE_RELOCS_SHLIB 0 | |
710 | #define PLTRESOLVE_RELOCS 2 | |
711 | #define PLT_NON_JUMP_SLOT_RELOCS 2 | |
712 | ||
23209a78 RM |
713 | /* Architecture-specific backend data for i386. */ |
714 | ||
715 | struct elf_i386_backend_data | |
716 | { | |
25e762b9 RM |
717 | /* Parameters describing PLT generation. */ |
718 | const struct elf_i386_plt_layout *plt; | |
719 | ||
23209a78 RM |
720 | /* Value used to fill the unused bytes of the first PLT entry. */ |
721 | bfd_byte plt0_pad_byte; | |
722 | ||
723 | /* True if the target system is VxWorks. */ | |
724 | int is_vxworks; | |
725 | }; | |
726 | ||
727 | #define get_elf_i386_backend_data(abfd) \ | |
728 | ((const struct elf_i386_backend_data *) \ | |
729 | get_elf_backend_data (abfd)->arch_data) | |
730 | ||
731 | /* These are the standard parameters. */ | |
732 | static const struct elf_i386_backend_data elf_i386_arch_bed = | |
733 | { | |
25e762b9 | 734 | &elf_i386_plt, /* plt */ |
23209a78 RM |
735 | 0, /* plt0_pad_byte */ |
736 | 0, /* is_vxworks */ | |
737 | }; | |
738 | ||
739 | #define elf_backend_arch_data &elf_i386_arch_bed | |
740 | ||
aec6b87e L |
741 | /* Is a undefined weak symbol which is resolved to 0. Reference to an |
742 | undefined weak symbol is resolved to 0 when building executable if | |
743 | it isn't dynamic and | |
744 | 1. Has non-GOT/non-PLT relocations in text section. Or | |
745 | 2. Has no GOT/PLT relocation. | |
746 | */ | |
e62b9723 | 747 | #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \ |
aec6b87e L |
748 | ((EH)->elf.root.type == bfd_link_hash_undefweak \ |
749 | && bfd_link_executable (INFO) \ | |
750 | && (elf_i386_hash_table (INFO)->interp == NULL \ | |
e62b9723 | 751 | || !(GOT_RELOC) \ |
aec6b87e L |
752 | || (EH)->has_non_got_reloc \ |
753 | || !(INFO)->dynamic_undefined_weak)) | |
754 | ||
252b5132 RH |
755 | /* i386 ELF linker hash entry. */ |
756 | ||
757 | struct elf_i386_link_hash_entry | |
758 | { | |
ebe50bae | 759 | struct elf_link_hash_entry elf; |
252b5132 | 760 | |
0c715baa | 761 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 762 | struct elf_dyn_relocs *dyn_relocs; |
13ae64f3 | 763 | |
37e55690 JJ |
764 | #define GOT_UNKNOWN 0 |
765 | #define GOT_NORMAL 1 | |
766 | #define GOT_TLS_GD 2 | |
767 | #define GOT_TLS_IE 4 | |
768 | #define GOT_TLS_IE_POS 5 | |
769 | #define GOT_TLS_IE_NEG 6 | |
770 | #define GOT_TLS_IE_BOTH 7 | |
67a4f2b7 AO |
771 | #define GOT_TLS_GDESC 8 |
772 | #define GOT_TLS_GD_BOTH_P(type) \ | |
773 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
774 | #define GOT_TLS_GD_P(type) \ | |
775 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
776 | #define GOT_TLS_GDESC_P(type) \ | |
777 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
778 | #define GOT_TLS_GD_ANY_P(type) \ | |
779 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
37e55690 | 780 | unsigned char tls_type; |
67a4f2b7 | 781 | |
d5597ebc L |
782 | /* Symbol is referenced by R_386_GOTOFF relocation. */ |
783 | unsigned int gotoff_ref : 1; | |
784 | ||
aec6b87e L |
785 | /* Symbol has GOT or PLT relocations. */ |
786 | unsigned int has_got_reloc : 1; | |
787 | ||
788 | /* Symbol has non-GOT/non-PLT relocations in text sections. */ | |
789 | unsigned int has_non_got_reloc : 1; | |
790 | ||
6eaa7fb5 L |
791 | /* 0: symbol isn't ___tls_get_addr. |
792 | 1: symbol is ___tls_get_addr. | |
793 | 2: symbol is unknown. */ | |
794 | unsigned int tls_get_addr : 2; | |
795 | ||
04ebc307 L |
796 | /* Reference count of C/C++ function pointer relocations in read-write |
797 | section which can be resolved at run-time. */ | |
798 | bfd_signed_vma func_pointer_refcount; | |
799 | ||
dd7e64d4 L |
800 | /* Information about the GOT PLT entry. Filled when there are both |
801 | GOT and PLT relocations against the same function. */ | |
802 | union gotplt_union plt_got; | |
803 | ||
67a4f2b7 AO |
804 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, |
805 | starting at the end of the jump table. */ | |
806 | bfd_vma tlsdesc_got; | |
13ae64f3 JJ |
807 | }; |
808 | ||
809 | #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent)) | |
810 | ||
811 | struct elf_i386_obj_tdata | |
812 | { | |
813 | struct elf_obj_tdata root; | |
814 | ||
815 | /* tls_type for each local got entry. */ | |
816 | char *local_got_tls_type; | |
67a4f2b7 AO |
817 | |
818 | /* GOTPLT entries for TLS descriptors. */ | |
819 | bfd_vma *local_tlsdesc_gotent; | |
252b5132 RH |
820 | }; |
821 | ||
13ae64f3 JJ |
822 | #define elf_i386_tdata(abfd) \ |
823 | ((struct elf_i386_obj_tdata *) (abfd)->tdata.any) | |
824 | ||
825 | #define elf_i386_local_got_tls_type(abfd) \ | |
826 | (elf_i386_tdata (abfd)->local_got_tls_type) | |
827 | ||
67a4f2b7 AO |
828 | #define elf_i386_local_tlsdesc_gotent(abfd) \ |
829 | (elf_i386_tdata (abfd)->local_tlsdesc_gotent) | |
830 | ||
0ffa91dd NC |
831 | #define is_i386_elf(bfd) \ |
832 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
833 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 834 | && elf_object_id (bfd) == I386_ELF_DATA) |
0ffa91dd | 835 | |
b34976b6 | 836 | static bfd_boolean |
55fd94b0 | 837 | elf_i386_mkobject (bfd *abfd) |
13ae64f3 | 838 | { |
0ffa91dd | 839 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata), |
4dfe6ac6 | 840 | I386_ELF_DATA); |
13ae64f3 | 841 | } |
cedb70c5 | 842 | |
252b5132 RH |
843 | /* i386 ELF linker hash table. */ |
844 | ||
845 | struct elf_i386_link_hash_table | |
846 | { | |
ebe50bae | 847 | struct elf_link_hash_table elf; |
252b5132 | 848 | |
6725bdbf | 849 | /* Short-cuts to get to dynamic linker sections. */ |
aec6b87e | 850 | asection *interp; |
e41b3a13 | 851 | asection *plt_eh_frame; |
dd7e64d4 | 852 | asection *plt_got; |
9635fe29 | 853 | |
4dfe6ac6 NC |
854 | union |
855 | { | |
13ae64f3 JJ |
856 | bfd_signed_vma refcount; |
857 | bfd_vma offset; | |
858 | } tls_ldm_got; | |
859 | ||
67a4f2b7 AO |
860 | /* The amount of space used by the reserved portion of the sgotplt |
861 | section, plus whatever space is used by the jump slots. */ | |
862 | bfd_vma sgotplt_jump_table_size; | |
863 | ||
87d72d41 AM |
864 | /* Small local sym cache. */ |
865 | struct sym_cache sym_cache; | |
9f03412a AO |
866 | |
867 | /* _TLS_MODULE_BASE_ symbol. */ | |
868 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
869 | |
870 | /* Used by local STT_GNU_IFUNC symbols. */ | |
871 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
872 | void * loc_hash_memory; |
873 | ||
874 | /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */ | |
875 | asection *srelplt2; | |
876 | ||
4dfe6ac6 NC |
877 | /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */ |
878 | bfd_vma next_tls_desc_index; | |
e1f98742 L |
879 | |
880 | /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */ | |
881 | bfd_vma next_jump_slot_index; | |
882 | ||
883 | /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */ | |
884 | bfd_vma next_irelative_index; | |
2df3368d L |
885 | |
886 | /* TRUE if there are dynamic relocs against IFUNC symbols that apply | |
887 | to read-only sections. */ | |
888 | bfd_boolean readonly_dynrelocs_against_ifunc; | |
6725bdbf | 889 | }; |
252b5132 RH |
890 | |
891 | /* Get the i386 ELF linker hash table from a link_info structure. */ | |
892 | ||
893 | #define elf_i386_hash_table(p) \ | |
4dfe6ac6 NC |
894 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
895 | == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL) | |
252b5132 | 896 | |
67a4f2b7 | 897 | #define elf_i386_compute_jump_table_size(htab) \ |
998d811a | 898 | ((htab)->elf.srelplt->reloc_count * 4) |
67a4f2b7 | 899 | |
252b5132 RH |
900 | /* Create an entry in an i386 ELF linker hash table. */ |
901 | ||
902 | static struct bfd_hash_entry * | |
eb4ff4d6 L |
903 | elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry, |
904 | struct bfd_hash_table *table, | |
905 | const char *string) | |
252b5132 | 906 | { |
252b5132 RH |
907 | /* Allocate the structure if it has not already been allocated by a |
908 | subclass. */ | |
ebe50bae AM |
909 | if (entry == NULL) |
910 | { | |
a50b1753 NC |
911 | entry = (struct bfd_hash_entry *) |
912 | bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry)); | |
ebe50bae AM |
913 | if (entry == NULL) |
914 | return entry; | |
915 | } | |
252b5132 RH |
916 | |
917 | /* Call the allocation method of the superclass. */ | |
ebe50bae AM |
918 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
919 | if (entry != NULL) | |
252b5132 | 920 | { |
ebe50bae AM |
921 | struct elf_i386_link_hash_entry *eh; |
922 | ||
923 | eh = (struct elf_i386_link_hash_entry *) entry; | |
924 | eh->dyn_relocs = NULL; | |
13ae64f3 | 925 | eh->tls_type = GOT_UNKNOWN; |
d5597ebc | 926 | eh->gotoff_ref = 0; |
aec6b87e L |
927 | eh->has_got_reloc = 0; |
928 | eh->has_non_got_reloc = 0; | |
6eaa7fb5 | 929 | eh->tls_get_addr = 2; |
04ebc307 | 930 | eh->func_pointer_refcount = 0; |
dd7e64d4 | 931 | eh->plt_got.offset = (bfd_vma) -1; |
67a4f2b7 | 932 | eh->tlsdesc_got = (bfd_vma) -1; |
252b5132 RH |
933 | } |
934 | ||
ebe50bae | 935 | return entry; |
252b5132 RH |
936 | } |
937 | ||
c25bc9fc L |
938 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
939 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
940 | as global symbol. We reuse indx and dynstr_index for local symbol | |
941 | hash since they aren't used by global symbols in this backend. */ | |
942 | ||
943 | static hashval_t | |
944 | elf_i386_local_htab_hash (const void *ptr) | |
945 | { | |
946 | struct elf_link_hash_entry *h | |
947 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 948 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
949 | } |
950 | ||
951 | /* Compare local hash entries. */ | |
952 | ||
953 | static int | |
954 | elf_i386_local_htab_eq (const void *ptr1, const void *ptr2) | |
955 | { | |
956 | struct elf_link_hash_entry *h1 | |
957 | = (struct elf_link_hash_entry *) ptr1; | |
958 | struct elf_link_hash_entry *h2 | |
959 | = (struct elf_link_hash_entry *) ptr2; | |
960 | ||
961 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
962 | } | |
963 | ||
964 | /* Find and/or create a hash entry for local symbol. */ | |
965 | ||
966 | static struct elf_link_hash_entry * | |
967 | elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab, | |
968 | bfd *abfd, const Elf_Internal_Rela *rel, | |
969 | bfd_boolean create) | |
970 | { | |
971 | struct elf_i386_link_hash_entry e, *ret; | |
972 | asection *sec = abfd->sections; | |
d2149d72 L |
973 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
974 | ELF32_R_SYM (rel->r_info)); | |
c25bc9fc L |
975 | void **slot; |
976 | ||
977 | e.elf.indx = sec->id; | |
978 | e.elf.dynstr_index = ELF32_R_SYM (rel->r_info); | |
979 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, | |
980 | create ? INSERT : NO_INSERT); | |
981 | ||
982 | if (!slot) | |
983 | return NULL; | |
984 | ||
985 | if (*slot) | |
986 | { | |
987 | ret = (struct elf_i386_link_hash_entry *) *slot; | |
988 | return &ret->elf; | |
989 | } | |
990 | ||
991 | ret = (struct elf_i386_link_hash_entry *) | |
992 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, | |
993 | sizeof (struct elf_i386_link_hash_entry)); | |
994 | if (ret) | |
995 | { | |
996 | memset (ret, 0, sizeof (*ret)); | |
997 | ret->elf.indx = sec->id; | |
998 | ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info); | |
999 | ret->elf.dynindx = -1; | |
04ebc307 | 1000 | ret->func_pointer_refcount = 0; |
dd7e64d4 | 1001 | ret->plt_got.offset = (bfd_vma) -1; |
c25bc9fc L |
1002 | *slot = ret; |
1003 | } | |
1004 | return &ret->elf; | |
1005 | } | |
1006 | ||
68faa637 AM |
1007 | /* Destroy an i386 ELF linker hash table. */ |
1008 | ||
1009 | static void | |
d495ab0d | 1010 | elf_i386_link_hash_table_free (bfd *obfd) |
68faa637 AM |
1011 | { |
1012 | struct elf_i386_link_hash_table *htab | |
d495ab0d | 1013 | = (struct elf_i386_link_hash_table *) obfd->link.hash; |
68faa637 AM |
1014 | |
1015 | if (htab->loc_hash_table) | |
1016 | htab_delete (htab->loc_hash_table); | |
1017 | if (htab->loc_hash_memory) | |
1018 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
d495ab0d | 1019 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
1020 | } |
1021 | ||
252b5132 RH |
1022 | /* Create an i386 ELF linker hash table. */ |
1023 | ||
1024 | static struct bfd_link_hash_table * | |
55fd94b0 | 1025 | elf_i386_link_hash_table_create (bfd *abfd) |
252b5132 RH |
1026 | { |
1027 | struct elf_i386_link_hash_table *ret; | |
dc810e39 | 1028 | bfd_size_type amt = sizeof (struct elf_i386_link_hash_table); |
252b5132 | 1029 | |
7bf52ea2 | 1030 | ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt); |
ebe50bae | 1031 | if (ret == NULL) |
252b5132 RH |
1032 | return NULL; |
1033 | ||
eb4ff4d6 L |
1034 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
1035 | elf_i386_link_hash_newfunc, | |
4dfe6ac6 NC |
1036 | sizeof (struct elf_i386_link_hash_entry), |
1037 | I386_ELF_DATA)) | |
252b5132 | 1038 | { |
e2d34d7d | 1039 | free (ret); |
252b5132 RH |
1040 | return NULL; |
1041 | } | |
1042 | ||
c25bc9fc L |
1043 | ret->loc_hash_table = htab_try_create (1024, |
1044 | elf_i386_local_htab_hash, | |
1045 | elf_i386_local_htab_eq, | |
1046 | NULL); | |
1047 | ret->loc_hash_memory = objalloc_create (); | |
1048 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
1049 | { | |
d495ab0d | 1050 | elf_i386_link_hash_table_free (abfd); |
c25bc9fc L |
1051 | return NULL; |
1052 | } | |
d495ab0d | 1053 | ret->elf.root.hash_table_free = elf_i386_link_hash_table_free; |
c25bc9fc | 1054 | |
ebe50bae | 1055 | return &ret->elf.root; |
252b5132 RH |
1056 | } |
1057 | ||
6725bdbf AM |
1058 | /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and |
1059 | .rel.bss sections in DYNOBJ, and set up shortcuts to them in our | |
1060 | hash table. */ | |
1061 | ||
b34976b6 | 1062 | static bfd_boolean |
55fd94b0 | 1063 | elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
6725bdbf AM |
1064 | { |
1065 | struct elf_i386_link_hash_table *htab; | |
1066 | ||
6725bdbf | 1067 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 1068 | return FALSE; |
6725bdbf | 1069 | |
6de2ae4a | 1070 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1071 | if (htab == NULL) |
1072 | return FALSE; | |
1073 | ||
493f652c L |
1074 | /* Set the contents of the .interp section to the interpreter. */ |
1075 | if (bfd_link_executable (info) && !info->nointerp) | |
1076 | { | |
1077 | asection *s = bfd_get_linker_section (dynobj, ".interp"); | |
1078 | if (s == NULL) | |
1079 | abort (); | |
1080 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
1081 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1082 | htab->interp = s; | |
1083 | } | |
1084 | ||
23209a78 | 1085 | if (get_elf_i386_backend_data (dynobj)->is_vxworks |
6de2ae4a L |
1086 | && !elf_vxworks_create_dynamic_sections (dynobj, info, |
1087 | &htab->srelplt2)) | |
711de32c | 1088 | return FALSE; |
eac338cf | 1089 | |
e41b3a13 | 1090 | if (!info->no_ld_generated_unwind_info |
2fe0fd06 | 1091 | && htab->plt_eh_frame == NULL |
e4de50d4 | 1092 | && htab->elf.splt != NULL) |
e41b3a13 | 1093 | { |
bbf96e4e L |
1094 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
1095 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1096 | | SEC_LINKER_CREATED); | |
e41b3a13 | 1097 | htab->plt_eh_frame |
bbf96e4e | 1098 | = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags); |
e41b3a13 JJ |
1099 | if (htab->plt_eh_frame == NULL |
1100 | || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2)) | |
1101 | return FALSE; | |
e41b3a13 JJ |
1102 | } |
1103 | ||
b34976b6 | 1104 | return TRUE; |
6725bdbf AM |
1105 | } |
1106 | ||
ebe50bae AM |
1107 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
1108 | ||
51b64d56 | 1109 | static void |
fcfa13d2 | 1110 | elf_i386_copy_indirect_symbol (struct bfd_link_info *info, |
55fd94b0 AM |
1111 | struct elf_link_hash_entry *dir, |
1112 | struct elf_link_hash_entry *ind) | |
ebe50bae AM |
1113 | { |
1114 | struct elf_i386_link_hash_entry *edir, *eind; | |
1115 | ||
1116 | edir = (struct elf_i386_link_hash_entry *) dir; | |
1117 | eind = (struct elf_i386_link_hash_entry *) ind; | |
1118 | ||
bbd7ec4a | 1119 | if (eind->dyn_relocs != NULL) |
ebe50bae | 1120 | { |
bbd7ec4a AM |
1121 | if (edir->dyn_relocs != NULL) |
1122 | { | |
e03a8ed8 L |
1123 | struct elf_dyn_relocs **pp; |
1124 | struct elf_dyn_relocs *p; | |
bbd7ec4a | 1125 | |
fcfa13d2 | 1126 | /* Add reloc counts against the indirect sym to the direct sym |
bbd7ec4a AM |
1127 | list. Merge any entries against the same section. */ |
1128 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1129 | { | |
e03a8ed8 | 1130 | struct elf_dyn_relocs *q; |
bbd7ec4a AM |
1131 | |
1132 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1133 | if (q->sec == p->sec) | |
1134 | { | |
1135 | q->pc_count += p->pc_count; | |
1136 | q->count += p->count; | |
1137 | *pp = p->next; | |
1138 | break; | |
1139 | } | |
1140 | if (q == NULL) | |
1141 | pp = &p->next; | |
1142 | } | |
1143 | *pp = edir->dyn_relocs; | |
1144 | } | |
1145 | ||
ebe50bae AM |
1146 | edir->dyn_relocs = eind->dyn_relocs; |
1147 | eind->dyn_relocs = NULL; | |
1148 | } | |
ebe50bae | 1149 | |
cd67d266 JJ |
1150 | if (ind->root.type == bfd_link_hash_indirect |
1151 | && dir->got.refcount <= 0) | |
1152 | { | |
1153 | edir->tls_type = eind->tls_type; | |
1154 | eind->tls_type = GOT_UNKNOWN; | |
1155 | } | |
81848ca0 | 1156 | |
d5597ebc L |
1157 | /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will |
1158 | generate a R_386_COPY reloc. */ | |
1159 | edir->gotoff_ref |= eind->gotoff_ref; | |
1160 | ||
aec6b87e L |
1161 | edir->has_got_reloc |= eind->has_got_reloc; |
1162 | edir->has_non_got_reloc |= eind->has_non_got_reloc; | |
1163 | ||
81848ca0 AM |
1164 | if (ELIMINATE_COPY_RELOCS |
1165 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1166 | && dir->dynamic_adjusted) |
1167 | { | |
1168 | /* If called to transfer flags for a weakdef during processing | |
1169 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1170 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
e81830c5 AM |
1171 | if (dir->versioned != versioned_hidden) |
1172 | dir->ref_dynamic |= ind->ref_dynamic; | |
f5385ebf AM |
1173 | dir->ref_regular |= ind->ref_regular; |
1174 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1175 | dir->needs_plt |= ind->needs_plt; | |
1176 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1177 | } | |
81848ca0 | 1178 | else |
04ebc307 L |
1179 | { |
1180 | if (eind->func_pointer_refcount > 0) | |
1181 | { | |
1182 | edir->func_pointer_refcount += eind->func_pointer_refcount; | |
1183 | eind->func_pointer_refcount = 0; | |
1184 | } | |
1185 | ||
1186 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
1187 | } | |
ebe50bae AM |
1188 | } |
1189 | ||
142411ca L |
1190 | /* Return TRUE if the TLS access code sequence support transition |
1191 | from R_TYPE. */ | |
1192 | ||
1193 | static bfd_boolean | |
bedfd056 | 1194 | elf_i386_check_tls_transition (asection *sec, |
142411ca L |
1195 | bfd_byte *contents, |
1196 | Elf_Internal_Shdr *symtab_hdr, | |
1197 | struct elf_link_hash_entry **sym_hashes, | |
1198 | unsigned int r_type, | |
1199 | const Elf_Internal_Rela *rel, | |
1200 | const Elf_Internal_Rela *relend) | |
13ae64f3 | 1201 | { |
6eaa7fb5 | 1202 | unsigned int val, type, reg; |
142411ca L |
1203 | unsigned long r_symndx; |
1204 | struct elf_link_hash_entry *h; | |
1205 | bfd_vma offset; | |
6eaa7fb5 L |
1206 | bfd_byte *call; |
1207 | bfd_boolean indirect_call, tls_get_addr; | |
142411ca | 1208 | |
142411ca | 1209 | offset = rel->r_offset; |
13ae64f3 | 1210 | switch (r_type) |
142411ca L |
1211 | { |
1212 | case R_386_TLS_GD: | |
1213 | case R_386_TLS_LDM: | |
1214 | if (offset < 2 || (rel + 1) >= relend) | |
1215 | return FALSE; | |
1216 | ||
6eaa7fb5 L |
1217 | indirect_call = FALSE; |
1218 | call = contents + offset + 4; | |
1219 | val = *(call - 5); | |
1220 | type = *(call - 6); | |
142411ca L |
1221 | if (r_type == R_386_TLS_GD) |
1222 | { | |
09e8c3bf | 1223 | /* Check transition from GD access model. Only |
6eaa7fb5 L |
1224 | leal foo@tlsgd(,%ebx,1), %eax |
1225 | call ___tls_get_addr@PLT | |
1226 | or | |
1227 | leal foo@tlsgd(%ebx) %eax | |
1228 | call ___tls_get_addr@PLT | |
1229 | nop | |
1230 | or | |
1231 | leal foo@tlsgd(%reg), %eax | |
1232 | call *___tls_get_addr@GOT(%reg) | |
1233 | which may be converted to | |
1234 | addr32 call ___tls_get_addr | |
142411ca | 1235 | can transit to different access model. */ |
6eaa7fb5 L |
1236 | if ((offset + 10) > sec->size |
1237 | || (type != 0x8d && type != 0x04)) | |
142411ca L |
1238 | return FALSE; |
1239 | ||
142411ca L |
1240 | if (type == 0x04) |
1241 | { | |
6eaa7fb5 L |
1242 | /* leal foo@tlsgd(,%ebx,1), %eax |
1243 | call ___tls_get_addr@PLT */ | |
142411ca L |
1244 | if (offset < 3) |
1245 | return FALSE; | |
1246 | ||
6eaa7fb5 L |
1247 | if (*(call - 7) != 0x8d |
1248 | || val != 0x1d | |
1249 | || call[0] != 0xe8) | |
142411ca L |
1250 | return FALSE; |
1251 | } | |
1252 | else | |
1253 | { | |
6eaa7fb5 L |
1254 | /* This must be |
1255 | leal foo@tlsgd(%ebx), %eax | |
1256 | call ___tls_get_addr@PLT | |
1257 | nop | |
1258 | or | |
1259 | leal foo@tlsgd(%reg), %eax | |
1260 | call *___tls_get_addr@GOT(%reg) | |
1261 | which may be converted to | |
1262 | addr32 call ___tls_get_addr | |
1263 | ||
1264 | %eax can't be used as the GOT base register since it | |
1265 | is used to pass parameter to ___tls_get_addr. */ | |
1266 | reg = val & 7; | |
1267 | if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0) | |
142411ca L |
1268 | return FALSE; |
1269 | ||
6eaa7fb5 L |
1270 | indirect_call = call[0] == 0xff; |
1271 | if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90) | |
1272 | && !(call[0] == 0x67 && call[1] == 0xe8) | |
1273 | && !(indirect_call | |
1274 | && (call[1] & 0xf8) == 0x90 | |
1275 | && (call[1] & 0x7) == reg)) | |
142411ca L |
1276 | return FALSE; |
1277 | } | |
1278 | } | |
1279 | else | |
1280 | { | |
1281 | /* Check transition from LD access model. Only | |
6eaa7fb5 L |
1282 | leal foo@tlsldm(%ebx), %eax |
1283 | call ___tls_get_addr@PLT | |
1284 | or | |
1285 | leal foo@tlsldm(%reg), %eax | |
1286 | call *___tls_get_addr@GOT(%reg) | |
1287 | which may be converted to | |
1288 | addr32 call ___tls_get_addr | |
142411ca L |
1289 | can transit to different access model. */ |
1290 | if (type != 0x8d || (offset + 9) > sec->size) | |
1291 | return FALSE; | |
1292 | ||
6eaa7fb5 L |
1293 | /* %eax can't be used as the GOT base register since it is |
1294 | used to pass parameter to ___tls_get_addr. */ | |
1295 | reg = val & 7; | |
1296 | if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0) | |
142411ca | 1297 | return FALSE; |
142411ca | 1298 | |
6eaa7fb5 L |
1299 | indirect_call = call[0] == 0xff; |
1300 | if (!(reg == 3 && call[0] == 0xe8) | |
1301 | && !(call[0] == 0x67 && call[1] == 0xe8) | |
1302 | && !(indirect_call | |
1303 | && (call[1] & 0xf8) == 0x90 | |
1304 | && (call[1] & 0x7) == reg)) | |
1305 | return FALSE; | |
1306 | } | |
142411ca L |
1307 | |
1308 | r_symndx = ELF32_R_SYM (rel[1].r_info); | |
1309 | if (r_symndx < symtab_hdr->sh_info) | |
1310 | return FALSE; | |
1311 | ||
6eaa7fb5 | 1312 | tls_get_addr = FALSE; |
142411ca | 1313 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
6eaa7fb5 L |
1314 | if (h != NULL && h->root.root.string != NULL) |
1315 | { | |
1316 | struct elf_i386_link_hash_entry *eh | |
1317 | = (struct elf_i386_link_hash_entry *) h; | |
1318 | tls_get_addr = eh->tls_get_addr == 1; | |
1319 | if (eh->tls_get_addr > 1) | |
1320 | { | |
1321 | /* Use strncmp to check ___tls_get_addr since | |
1322 | ___tls_get_addr may be versioned. */ | |
1323 | if (strncmp (h->root.root.string, "___tls_get_addr", 15) | |
1324 | == 0) | |
1325 | { | |
1326 | eh->tls_get_addr = 1; | |
1327 | tls_get_addr = TRUE; | |
1328 | } | |
1329 | else | |
1330 | eh->tls_get_addr = 0; | |
1331 | } | |
1332 | } | |
1333 | ||
1334 | if (!tls_get_addr) | |
1335 | return FALSE; | |
1336 | else if (indirect_call) | |
1337 | return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X); | |
1338 | else | |
1339 | return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32 | |
1340 | || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); | |
142411ca L |
1341 | |
1342 | case R_386_TLS_IE: | |
1343 | /* Check transition from IE access model: | |
1344 | movl foo@indntpoff(%rip), %eax | |
1345 | movl foo@indntpoff(%rip), %reg | |
1346 | addl foo@indntpoff(%rip), %reg | |
1347 | */ | |
1348 | ||
1349 | if (offset < 1 || (offset + 4) > sec->size) | |
1350 | return FALSE; | |
1351 | ||
1352 | /* Check "movl foo@tpoff(%rip), %eax" first. */ | |
1353 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1354 | if (val == 0xa1) | |
1355 | return TRUE; | |
1356 | ||
1357 | if (offset < 2) | |
1358 | return FALSE; | |
1359 | ||
1360 | /* Check movl|addl foo@tpoff(%rip), %reg. */ | |
1361 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1362 | return ((type == 0x8b || type == 0x03) | |
1363 | && (val & 0xc7) == 0x05); | |
1364 | ||
1365 | case R_386_TLS_GOTIE: | |
1366 | case R_386_TLS_IE_32: | |
1367 | /* Check transition from {IE_32,GOTIE} access model: | |
1368 | subl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1369 | movl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1370 | addl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1371 | */ | |
1372 | ||
1373 | if (offset < 2 || (offset + 4) > sec->size) | |
1374 | return FALSE; | |
1375 | ||
1376 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1377 | if ((val & 0xc0) != 0x80 || (val & 7) == 4) | |
1378 | return FALSE; | |
1379 | ||
1380 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1381 | return type == 0x8b || type == 0x2b || type == 0x03; | |
1382 | ||
1383 | case R_386_TLS_GOTDESC: | |
1384 | /* Check transition from GDesc access model: | |
1385 | leal x@tlsdesc(%ebx), %eax | |
1386 | ||
1387 | Make sure it's a leal adding ebx to a 32-bit offset | |
1388 | into any register, although it's probably almost always | |
1389 | going to be eax. */ | |
1390 | ||
1391 | if (offset < 2 || (offset + 4) > sec->size) | |
1392 | return FALSE; | |
1393 | ||
1394 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1395 | return FALSE; | |
1396 | ||
1397 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1398 | return (val & 0xc7) == 0x83; | |
1399 | ||
1400 | case R_386_TLS_DESC_CALL: | |
1401 | /* Check transition from GDesc access model: | |
6eaa7fb5 | 1402 | call *x@tlsdesc(%eax) |
142411ca L |
1403 | */ |
1404 | if (offset + 2 <= sec->size) | |
1405 | { | |
6eaa7fb5 L |
1406 | /* Make sure that it's a call *x@tlsdesc(%eax). */ |
1407 | call = contents + offset; | |
1408 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1409 | } |
1410 | ||
1411 | return FALSE; | |
1412 | ||
1413 | default: | |
1414 | abort (); | |
1415 | } | |
1416 | } | |
1417 | ||
1418 | /* Return TRUE if the TLS access transition is OK or no transition | |
1419 | will be performed. Update R_TYPE if there is a transition. */ | |
1420 | ||
1421 | static bfd_boolean | |
1422 | elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd, | |
1423 | asection *sec, bfd_byte *contents, | |
1424 | Elf_Internal_Shdr *symtab_hdr, | |
1425 | struct elf_link_hash_entry **sym_hashes, | |
1426 | unsigned int *r_type, int tls_type, | |
1427 | const Elf_Internal_Rela *rel, | |
1428 | const Elf_Internal_Rela *relend, | |
4c544807 | 1429 | struct elf_link_hash_entry *h, |
bedfd056 L |
1430 | unsigned long r_symndx, |
1431 | bfd_boolean from_relocate_section) | |
142411ca L |
1432 | { |
1433 | unsigned int from_type = *r_type; | |
1434 | unsigned int to_type = from_type; | |
1435 | bfd_boolean check = TRUE; | |
1436 | ||
bb1cb422 L |
1437 | /* Skip TLS transition for functions. */ |
1438 | if (h != NULL | |
1439 | && (h->type == STT_FUNC | |
1440 | || h->type == STT_GNU_IFUNC)) | |
1441 | return TRUE; | |
1442 | ||
142411ca | 1443 | switch (from_type) |
13ae64f3 JJ |
1444 | { |
1445 | case R_386_TLS_GD: | |
67a4f2b7 AO |
1446 | case R_386_TLS_GOTDESC: |
1447 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 1448 | case R_386_TLS_IE_32: |
37e55690 JJ |
1449 | case R_386_TLS_IE: |
1450 | case R_386_TLS_GOTIE: | |
0e1862bb | 1451 | if (bfd_link_executable (info)) |
142411ca L |
1452 | { |
1453 | if (h == NULL) | |
1454 | to_type = R_386_TLS_LE_32; | |
1455 | else if (from_type != R_386_TLS_IE | |
1456 | && from_type != R_386_TLS_GOTIE) | |
1457 | to_type = R_386_TLS_IE_32; | |
1458 | } | |
1459 | ||
bedfd056 L |
1460 | /* When we are called from elf_i386_relocate_section, there may |
1461 | be additional transitions based on TLS_TYPE. */ | |
1462 | if (from_relocate_section) | |
142411ca L |
1463 | { |
1464 | unsigned int new_to_type = to_type; | |
1465 | ||
0e1862bb | 1466 | if (bfd_link_executable (info) |
142411ca L |
1467 | && h != NULL |
1468 | && h->dynindx == -1 | |
1469 | && (tls_type & GOT_TLS_IE)) | |
1470 | new_to_type = R_386_TLS_LE_32; | |
1471 | ||
1472 | if (to_type == R_386_TLS_GD | |
1473 | || to_type == R_386_TLS_GOTDESC | |
1474 | || to_type == R_386_TLS_DESC_CALL) | |
1475 | { | |
1476 | if (tls_type == GOT_TLS_IE_POS) | |
1477 | new_to_type = R_386_TLS_GOTIE; | |
1478 | else if (tls_type & GOT_TLS_IE) | |
1479 | new_to_type = R_386_TLS_IE_32; | |
1480 | } | |
1481 | ||
1482 | /* We checked the transition before when we were called from | |
1483 | elf_i386_check_relocs. We only want to check the new | |
1484 | transition which hasn't been checked before. */ | |
1485 | check = new_to_type != to_type && from_type == to_type; | |
1486 | to_type = new_to_type; | |
1487 | } | |
1488 | ||
1489 | break; | |
1490 | ||
13ae64f3 | 1491 | case R_386_TLS_LDM: |
0e1862bb | 1492 | if (bfd_link_executable (info)) |
142411ca L |
1493 | to_type = R_386_TLS_LE_32; |
1494 | break; | |
1495 | ||
1496 | default: | |
1497 | return TRUE; | |
1498 | } | |
1499 | ||
1500 | /* Return TRUE if there is no transition. */ | |
1501 | if (from_type == to_type) | |
1502 | return TRUE; | |
1503 | ||
1504 | /* Check if the transition can be performed. */ | |
1505 | if (check | |
bedfd056 | 1506 | && ! elf_i386_check_tls_transition (sec, contents, |
142411ca L |
1507 | symtab_hdr, sym_hashes, |
1508 | from_type, rel, relend)) | |
1509 | { | |
2f629d23 | 1510 | reloc_howto_type *from, *to; |
4c544807 | 1511 | const char *name; |
142411ca L |
1512 | |
1513 | from = elf_i386_rtype_to_howto (abfd, from_type); | |
1514 | to = elf_i386_rtype_to_howto (abfd, to_type); | |
1515 | ||
4c544807 L |
1516 | if (h) |
1517 | name = h->root.root.string; | |
1518 | else | |
1519 | { | |
4c544807 | 1520 | struct elf_i386_link_hash_table *htab; |
4dfe6ac6 | 1521 | |
4c544807 | 1522 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1523 | if (htab == NULL) |
1524 | name = "*unknown*"; | |
1525 | else | |
1526 | { | |
1527 | Elf_Internal_Sym *isym; | |
1528 | ||
1529 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1530 | abfd, r_symndx); | |
1531 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1532 | } | |
4c544807 L |
1533 | } |
1534 | ||
4eca0228 | 1535 | _bfd_error_handler |
695344c0 | 1536 | /* xgettext:c-format */ |
142411ca L |
1537 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " |
1538 | "in section `%A' failed"), | |
4c544807 | 1539 | abfd, sec, from->name, to->name, name, |
142411ca L |
1540 | (unsigned long) rel->r_offset); |
1541 | bfd_set_error (bfd_error_bad_value); | |
1542 | return FALSE; | |
13ae64f3 JJ |
1543 | } |
1544 | ||
142411ca L |
1545 | *r_type = to_type; |
1546 | return TRUE; | |
13ae64f3 JJ |
1547 | } |
1548 | ||
c175a657 L |
1549 | /* With the local symbol, foo, we convert |
1550 | mov foo@GOT[(%reg1)], %reg2 | |
1551 | to | |
1552 | lea foo[@GOTOFF(%reg1)], %reg2 | |
1553 | and convert | |
1554 | call/jmp *foo@GOT[(%reg)] | |
1555 | to | |
1556 | nop call foo/jmp foo nop | |
1557 | When PIC is false, convert | |
1558 | test %reg1, foo@GOT[(%reg2)] | |
1559 | to | |
1560 | test $foo, %reg1 | |
1561 | and convert | |
1562 | binop foo@GOT[(%reg1)], %reg2 | |
1563 | to | |
1564 | binop $foo, %reg2 | |
1565 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1566 | instructions. */ | |
1567 | ||
1568 | static | |
1569 | bfd_boolean | |
1570 | elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr, | |
1571 | bfd_byte *contents, | |
1572 | Elf_Internal_Rela *irel, | |
1573 | struct elf_link_hash_entry *h, | |
1574 | bfd_boolean *converted, | |
1575 | struct bfd_link_info *link_info) | |
1576 | { | |
1577 | struct elf_i386_link_hash_table *htab; | |
1578 | unsigned int opcode; | |
1579 | unsigned int modrm; | |
1580 | bfd_boolean baseless; | |
1581 | Elf_Internal_Sym *isym; | |
1582 | unsigned int addend; | |
1583 | unsigned int nop; | |
1584 | bfd_vma nop_offset; | |
1585 | bfd_boolean is_pic; | |
1586 | bfd_boolean to_reloc_32; | |
1587 | unsigned int r_type; | |
1588 | unsigned int r_symndx; | |
1589 | bfd_vma roff = irel->r_offset; | |
1590 | ||
1591 | if (roff < 2) | |
1592 | return TRUE; | |
1593 | ||
7d4d9709 | 1594 | /* Addend for R_386_GOT32X relocations must be 0. */ |
c175a657 L |
1595 | addend = bfd_get_32 (abfd, contents + roff); |
1596 | if (addend != 0) | |
1597 | return TRUE; | |
1598 | ||
1599 | htab = elf_i386_hash_table (link_info); | |
1600 | is_pic = bfd_link_pic (link_info); | |
1601 | ||
1602 | r_type = ELF32_R_TYPE (irel->r_info); | |
1603 | r_symndx = ELF32_R_SYM (irel->r_info); | |
1604 | ||
1605 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1606 | baseless = (modrm & 0xc7) == 0x5; | |
1607 | ||
7d4d9709 | 1608 | if (baseless && is_pic) |
c175a657 L |
1609 | { |
1610 | /* For PIC, disallow R_386_GOT32X without a base register | |
7d4d9709 | 1611 | since we don't know what the GOT base is. */ |
c175a657 L |
1612 | const char *name; |
1613 | ||
1614 | if (h == NULL) | |
1615 | { | |
1616 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, | |
1617 | r_symndx); | |
1618 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1619 | } | |
1620 | else | |
1621 | name = h->root.root.string; | |
1622 | ||
4eca0228 | 1623 | _bfd_error_handler |
695344c0 | 1624 | /* xgettext:c-format */ |
c175a657 L |
1625 | (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base register can not be used when making a shared object"), |
1626 | abfd, name); | |
1627 | return FALSE; | |
1628 | } | |
1629 | ||
1630 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1631 | ||
c175a657 L |
1632 | /* Convert to R_386_32 if PIC is false or there is no base |
1633 | register. */ | |
1634 | to_reloc_32 = !is_pic || baseless; | |
1635 | ||
7d4d9709 L |
1636 | /* Try to convert R_386_GOT32X. Get the symbol referred to by the |
1637 | reloc. */ | |
c175a657 L |
1638 | if (h == NULL) |
1639 | { | |
1640 | if (opcode == 0x0ff) | |
1641 | /* Convert "call/jmp *foo@GOT[(%reg)]". */ | |
1642 | goto convert_branch; | |
1643 | else | |
1644 | /* Convert "mov foo@GOT[(%reg1)], %reg2", | |
1645 | "test %reg1, foo@GOT(%reg2)" and | |
1646 | "binop foo@GOT[(%reg1)], %reg2". */ | |
1647 | goto convert_load; | |
1648 | } | |
1649 | ||
1650 | /* Undefined weak symbol is only bound locally in executable | |
1651 | and its reference is resolved as 0. */ | |
1652 | if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, TRUE, | |
1653 | elf_i386_hash_entry (h))) | |
1654 | { | |
1655 | if (opcode == 0xff) | |
1656 | { | |
1657 | /* No direct branch to 0 for PIC. */ | |
1658 | if (is_pic) | |
1659 | return TRUE; | |
1660 | else | |
1661 | goto convert_branch; | |
1662 | } | |
1663 | else | |
1664 | { | |
1665 | /* We can convert load of address 0 to R_386_32. */ | |
1666 | to_reloc_32 = TRUE; | |
1667 | goto convert_load; | |
1668 | } | |
1669 | } | |
1670 | ||
1671 | if (opcode == 0xff) | |
1672 | { | |
1673 | /* We have "call/jmp *foo@GOT[(%reg)]". */ | |
1674 | if ((h->root.type == bfd_link_hash_defined | |
1675 | || h->root.type == bfd_link_hash_defweak) | |
1676 | && SYMBOL_REFERENCES_LOCAL (link_info, h)) | |
1677 | { | |
1678 | /* The function is locally defined. */ | |
1679 | convert_branch: | |
1680 | /* Convert R_386_GOT32X to R_386_PC32. */ | |
1681 | if (modrm == 0x15 || (modrm & 0xf8) == 0x90) | |
1682 | { | |
6eaa7fb5 L |
1683 | struct elf_i386_link_hash_entry *eh |
1684 | = (struct elf_i386_link_hash_entry *) h; | |
1685 | ||
c175a657 L |
1686 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
1687 | is a nop prefix. */ | |
1688 | modrm = 0xe8; | |
6eaa7fb5 L |
1689 | /* To support TLS optimization, always use addr32 prefix |
1690 | for "call *___tls_get_addr@GOT(%reg)". */ | |
1691 | if (eh && eh->tls_get_addr == 1) | |
c175a657 | 1692 | { |
6eaa7fb5 L |
1693 | nop = 0x67; |
1694 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1695 | } |
1696 | else | |
6eaa7fb5 L |
1697 | { |
1698 | nop = link_info->call_nop_byte; | |
1699 | if (link_info->call_nop_as_suffix) | |
1700 | { | |
1701 | nop_offset = roff + 3; | |
1702 | irel->r_offset -= 1; | |
1703 | } | |
1704 | else | |
1705 | nop_offset = roff - 2; | |
1706 | } | |
c175a657 L |
1707 | } |
1708 | else | |
1709 | { | |
1710 | /* Convert to "jmp foo nop". */ | |
1711 | modrm = 0xe9; | |
1712 | nop = NOP_OPCODE; | |
1713 | nop_offset = roff + 3; | |
1714 | irel->r_offset -= 1; | |
1715 | } | |
1716 | ||
1717 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1718 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1719 | /* When converting to PC-relative relocation, we | |
1720 | need to adjust addend by -4. */ | |
1721 | bfd_put_32 (abfd, -4, contents + irel->r_offset); | |
1722 | irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32); | |
1723 | ||
1724 | *converted = TRUE; | |
1725 | } | |
1726 | } | |
1727 | else | |
1728 | { | |
1729 | /* We have "mov foo@GOT[(%re1g)], %reg2", | |
1730 | "test %reg1, foo@GOT(%reg2)" and | |
1731 | "binop foo@GOT[(%reg1)], %reg2". | |
1732 | ||
1733 | Avoid optimizing _DYNAMIC since ld.so may use its | |
1734 | link-time address. */ | |
1735 | if (h == htab->elf.hdynamic) | |
1736 | return TRUE; | |
1737 | ||
1738 | /* def_regular is set by an assignment in a linker script in | |
1739 | bfd_elf_record_link_assignment. */ | |
1740 | if ((h->def_regular | |
1741 | || h->root.type == bfd_link_hash_defined | |
1742 | || h->root.type == bfd_link_hash_defweak) | |
1743 | && SYMBOL_REFERENCES_LOCAL (link_info, h)) | |
1744 | { | |
1745 | convert_load: | |
1746 | if (opcode == 0x8b) | |
1747 | { | |
1748 | if (to_reloc_32) | |
1749 | { | |
1750 | /* Convert "mov foo@GOT[(%reg1)], %reg2" to | |
1751 | "mov $foo, %reg2" with R_386_32. */ | |
1752 | r_type = R_386_32; | |
1753 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1754 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1755 | opcode = 0xc7; | |
1756 | } | |
1757 | else | |
1758 | { | |
1759 | /* Convert "mov foo@GOT(%reg1), %reg2" to | |
1760 | "lea foo@GOTOFF(%reg1), %reg2". */ | |
1761 | r_type = R_386_GOTOFF; | |
1762 | opcode = 0x8d; | |
1763 | } | |
1764 | } | |
1765 | else | |
1766 | { | |
1767 | /* Only R_386_32 is supported. */ | |
1768 | if (!to_reloc_32) | |
1769 | return TRUE; | |
1770 | ||
1771 | if (opcode == 0x85) | |
1772 | { | |
1773 | /* Convert "test %reg1, foo@GOT(%reg2)" to | |
1774 | "test $foo, %reg1". */ | |
1775 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1776 | opcode = 0xf7; | |
1777 | } | |
1778 | else | |
1779 | { | |
1780 | /* Convert "binop foo@GOT(%reg1), %reg2" to | |
1781 | "binop $foo, %reg2". */ | |
1782 | modrm = (0xc0 | |
1783 | | (modrm & 0x38) >> 3 | |
1784 | | (opcode & 0x3c)); | |
1785 | opcode = 0x81; | |
1786 | } | |
1787 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1788 | r_type = R_386_32; | |
1789 | } | |
1790 | ||
1791 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1792 | irel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
1793 | ||
1794 | *converted = TRUE; | |
1795 | } | |
1796 | } | |
1797 | ||
1798 | return TRUE; | |
1799 | } | |
1800 | ||
c1d11331 L |
1801 | /* Rename some of the generic section flags to better document how they |
1802 | are used here. */ | |
c337a162 L |
1803 | #define need_convert_load sec_flg0 |
1804 | #define check_relocs_failed sec_flg1 | |
c1d11331 | 1805 | |
252b5132 | 1806 | /* Look through the relocs for a section during the first phase, and |
0ac8d2ca AM |
1807 | calculate needed space in the global offset table, procedure linkage |
1808 | table, and dynamic reloc sections. */ | |
252b5132 | 1809 | |
b34976b6 | 1810 | static bfd_boolean |
55fd94b0 AM |
1811 | elf_i386_check_relocs (bfd *abfd, |
1812 | struct bfd_link_info *info, | |
1813 | asection *sec, | |
1814 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1815 | { |
6725bdbf | 1816 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
1817 | Elf_Internal_Shdr *symtab_hdr; |
1818 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
1819 | const Elf_Internal_Rela *rel; |
1820 | const Elf_Internal_Rela *rel_end; | |
252b5132 | 1821 | asection *sreloc; |
bedfd056 | 1822 | bfd_byte *contents; |
dd7e64d4 | 1823 | bfd_boolean use_plt_got; |
252b5132 | 1824 | |
0e1862bb | 1825 | if (bfd_link_relocatable (info)) |
b34976b6 | 1826 | return TRUE; |
252b5132 | 1827 | |
081b1afe L |
1828 | /* Don't do anything special with non-loaded, non-alloced sections. |
1829 | In particular, any relocs in such sections should not affect GOT | |
1830 | and PLT reference counting (ie. we don't allow them to create GOT | |
1831 | or PLT entries), there's no possibility or desire to optimize TLS | |
1832 | relocs, and there's not much point in propagating relocs to shared | |
1833 | libs that the dynamic linker won't relocate. */ | |
1834 | if ((sec->flags & SEC_ALLOC) == 0) | |
1835 | return TRUE; | |
1836 | ||
0ffa91dd NC |
1837 | BFD_ASSERT (is_i386_elf (abfd)); |
1838 | ||
6725bdbf | 1839 | htab = elf_i386_hash_table (info); |
4dfe6ac6 | 1840 | if (htab == NULL) |
c337a162 L |
1841 | { |
1842 | sec->check_relocs_failed = 1; | |
1843 | return FALSE; | |
1844 | } | |
4dfe6ac6 | 1845 | |
bedfd056 L |
1846 | /* Get the section contents. */ |
1847 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1848 | contents = elf_section_data (sec)->this_hdr.contents; | |
1849 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1850 | { | |
1851 | sec->check_relocs_failed = 1; | |
1852 | return FALSE; | |
1853 | } | |
1854 | ||
dd7e64d4 L |
1855 | use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks |
1856 | && (get_elf_i386_backend_data (abfd) | |
1857 | == &elf_i386_arch_bed)); | |
1858 | ||
0ffa91dd | 1859 | symtab_hdr = &elf_symtab_hdr (abfd); |
252b5132 | 1860 | sym_hashes = elf_sym_hashes (abfd); |
252b5132 | 1861 | |
252b5132 RH |
1862 | sreloc = NULL; |
1863 | ||
1864 | rel_end = relocs + sec->reloc_count; | |
1865 | for (rel = relocs; rel < rel_end; rel++) | |
1866 | { | |
13ae64f3 | 1867 | unsigned int r_type; |
252b5132 RH |
1868 | unsigned long r_symndx; |
1869 | struct elf_link_hash_entry *h; | |
d5597ebc | 1870 | struct elf_i386_link_hash_entry *eh; |
4c544807 L |
1871 | Elf_Internal_Sym *isym; |
1872 | const char *name; | |
06a6a421 | 1873 | bfd_boolean size_reloc; |
252b5132 RH |
1874 | |
1875 | r_symndx = ELF32_R_SYM (rel->r_info); | |
13ae64f3 | 1876 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 1877 | |
d9bc7a44 | 1878 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
f5f31454 | 1879 | { |
695344c0 | 1880 | /* xgettext:c-format */ |
4eca0228 AM |
1881 | _bfd_error_handler (_("%B: bad symbol index: %d"), |
1882 | abfd, r_symndx); | |
c337a162 | 1883 | goto error_return; |
f5f31454 L |
1884 | } |
1885 | ||
252b5132 | 1886 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1887 | { |
1888 | /* A local symbol. */ | |
c2e61a4e L |
1889 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1890 | abfd, r_symndx); | |
1891 | if (isym == NULL) | |
c337a162 | 1892 | goto error_return; |
c25bc9fc L |
1893 | |
1894 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
c25bc9fc L |
1895 | if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
1896 | { | |
9fff0c39 | 1897 | h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE); |
c25bc9fc | 1898 | if (h == NULL) |
c337a162 | 1899 | goto error_return; |
6bbec505 | 1900 | |
c25bc9fc L |
1901 | /* Fake a STT_GNU_IFUNC symbol. */ |
1902 | h->type = STT_GNU_IFUNC; | |
1903 | h->def_regular = 1; | |
1904 | h->ref_regular = 1; | |
1905 | h->forced_local = 1; | |
1906 | h->root.type = bfd_link_hash_defined; | |
1907 | } | |
1908 | else | |
1909 | h = NULL; | |
1910 | } | |
252b5132 | 1911 | else |
71cb9464 | 1912 | { |
4c544807 | 1913 | isym = NULL; |
71cb9464 L |
1914 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1915 | while (h->root.type == bfd_link_hash_indirect | |
1916 | || h->root.type == bfd_link_hash_warning) | |
1917 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1918 | } |
cbe950e9 | 1919 | |
d5597ebc | 1920 | eh = (struct elf_i386_link_hash_entry *) h; |
c25bc9fc L |
1921 | if (h != NULL) |
1922 | { | |
cbe950e9 L |
1923 | switch (r_type) |
1924 | { | |
1925 | default: | |
1926 | break; | |
1927 | ||
d5597ebc L |
1928 | case R_386_GOTOFF: |
1929 | eh->gotoff_ref = 1; | |
1a0670f3 | 1930 | /* Fall through. */ |
cbe950e9 L |
1931 | case R_386_32: |
1932 | case R_386_PC32: | |
1933 | case R_386_PLT32: | |
1934 | case R_386_GOT32: | |
02a86693 | 1935 | case R_386_GOT32X: |
9d4057ee AM |
1936 | if (htab->elf.dynobj == NULL) |
1937 | htab->elf.dynobj = abfd; | |
466ee2af L |
1938 | /* Create the ifunc sections for static executables. */ |
1939 | if (h->type == STT_GNU_IFUNC | |
1940 | && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj, | |
1941 | info)) | |
c337a162 | 1942 | goto error_return; |
cbe950e9 L |
1943 | break; |
1944 | } | |
1945 | ||
ad1e85de L |
1946 | /* It is referenced by a non-shared object. */ |
1947 | h->ref_regular = 1; | |
61315175 | 1948 | h->root.non_ir_ref = 1; |
13a2df29 L |
1949 | |
1950 | if (h->type == STT_GNU_IFUNC) | |
1951 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
1952 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 1953 | } |
252b5132 | 1954 | |
bedfd056 | 1955 | if (! elf_i386_tls_transition (info, abfd, sec, contents, |
142411ca L |
1956 | symtab_hdr, sym_hashes, |
1957 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 1958 | rel, rel_end, h, r_symndx, FALSE)) |
c337a162 | 1959 | goto error_return; |
13ae64f3 JJ |
1960 | |
1961 | switch (r_type) | |
252b5132 | 1962 | { |
37e55690 JJ |
1963 | case R_386_TLS_LDM: |
1964 | htab->tls_ldm_got.refcount += 1; | |
1965 | goto create_got; | |
1966 | ||
1967 | case R_386_PLT32: | |
1968 | /* This symbol requires a procedure linkage table entry. We | |
1969 | actually build the entry in adjust_dynamic_symbol, | |
1970 | because this might be a case of linking PIC code which is | |
1971 | never referenced by a dynamic object, in which case we | |
1972 | don't need to generate a procedure linkage table entry | |
1973 | after all. */ | |
1974 | ||
1975 | /* If this is a local symbol, we resolve it directly without | |
1976 | creating a procedure linkage table entry. */ | |
1977 | if (h == NULL) | |
1978 | continue; | |
1979 | ||
aec6b87e | 1980 | eh->has_got_reloc = 1; |
f5385ebf | 1981 | h->needs_plt = 1; |
37e55690 JJ |
1982 | h->plt.refcount += 1; |
1983 | break; | |
1984 | ||
6a3e1bae | 1985 | case R_386_SIZE32: |
06a6a421 | 1986 | size_reloc = TRUE; |
6a3e1bae L |
1987 | goto do_size; |
1988 | ||
13ae64f3 | 1989 | case R_386_TLS_IE_32: |
37e55690 JJ |
1990 | case R_386_TLS_IE: |
1991 | case R_386_TLS_GOTIE: | |
0e1862bb | 1992 | if (!bfd_link_executable (info)) |
13ae64f3 | 1993 | info->flags |= DF_STATIC_TLS; |
37e55690 JJ |
1994 | /* Fall through */ |
1995 | ||
252b5132 | 1996 | case R_386_GOT32: |
02a86693 | 1997 | case R_386_GOT32X: |
13ae64f3 | 1998 | case R_386_TLS_GD: |
67a4f2b7 AO |
1999 | case R_386_TLS_GOTDESC: |
2000 | case R_386_TLS_DESC_CALL: | |
252b5132 | 2001 | /* This symbol requires a global offset table entry. */ |
13ae64f3 JJ |
2002 | { |
2003 | int tls_type, old_tls_type; | |
2004 | ||
2005 | switch (r_type) | |
2006 | { | |
2007 | default: | |
02a86693 L |
2008 | case R_386_GOT32: |
2009 | case R_386_GOT32X: | |
2010 | tls_type = GOT_NORMAL; | |
2011 | break; | |
13ae64f3 | 2012 | case R_386_TLS_GD: tls_type = GOT_TLS_GD; break; |
67a4f2b7 AO |
2013 | case R_386_TLS_GOTDESC: |
2014 | case R_386_TLS_DESC_CALL: | |
2015 | tls_type = GOT_TLS_GDESC; break; | |
37e55690 JJ |
2016 | case R_386_TLS_IE_32: |
2017 | if (ELF32_R_TYPE (rel->r_info) == r_type) | |
2018 | tls_type = GOT_TLS_IE_NEG; | |
2019 | else | |
ebcfb3c0 JJ |
2020 | /* If this is a GD->IE transition, we may use either of |
2021 | R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */ | |
37e55690 JJ |
2022 | tls_type = GOT_TLS_IE; |
2023 | break; | |
2024 | case R_386_TLS_IE: | |
2025 | case R_386_TLS_GOTIE: | |
2026 | tls_type = GOT_TLS_IE_POS; break; | |
13ae64f3 JJ |
2027 | } |
2028 | ||
2029 | if (h != NULL) | |
2030 | { | |
2031 | h->got.refcount += 1; | |
2032 | old_tls_type = elf_i386_hash_entry(h)->tls_type; | |
2033 | } | |
2034 | else | |
2035 | { | |
2036 | bfd_signed_vma *local_got_refcounts; | |
2037 | ||
2038 | /* This is a global offset table entry for a local symbol. */ | |
2039 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2040 | if (local_got_refcounts == NULL) | |
2041 | { | |
2042 | bfd_size_type size; | |
2043 | ||
2044 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
2045 | size *= (sizeof (bfd_signed_vma) |
2046 | + sizeof (bfd_vma) + sizeof(char)); | |
a50b1753 NC |
2047 | local_got_refcounts = (bfd_signed_vma *) |
2048 | bfd_zalloc (abfd, size); | |
13ae64f3 | 2049 | if (local_got_refcounts == NULL) |
c337a162 | 2050 | goto error_return; |
13ae64f3 | 2051 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
67a4f2b7 AO |
2052 | elf_i386_local_tlsdesc_gotent (abfd) |
2053 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); | |
13ae64f3 | 2054 | elf_i386_local_got_tls_type (abfd) |
67a4f2b7 | 2055 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
13ae64f3 JJ |
2056 | } |
2057 | local_got_refcounts[r_symndx] += 1; | |
2058 | old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx]; | |
2059 | } | |
2060 | ||
37e55690 JJ |
2061 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) |
2062 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
2063 | /* If a TLS symbol is accessed using IE at least once, |
2064 | there is no point to use dynamic model for it. */ | |
ebcfb3c0 | 2065 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN |
67a4f2b7 | 2066 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
37e55690 | 2067 | || (tls_type & GOT_TLS_IE) == 0)) |
13ae64f3 | 2068 | { |
67a4f2b7 | 2069 | if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type)) |
37e55690 | 2070 | tls_type = old_tls_type; |
67a4f2b7 AO |
2071 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2072 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2073 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
2074 | else |
2075 | { | |
09a24cbf | 2076 | if (h) |
4c544807 L |
2077 | name = h->root.root.string; |
2078 | else | |
2079 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
2080 | NULL); | |
4eca0228 | 2081 | _bfd_error_handler |
695344c0 | 2082 | /* xgettext:c-format */ |
d003868e | 2083 | (_("%B: `%s' accessed both as normal and " |
55fd94b0 | 2084 | "thread local symbol"), |
4c544807 | 2085 | abfd, name); |
68c4a57e | 2086 | bfd_set_error (bfd_error_bad_value); |
c337a162 | 2087 | goto error_return; |
13ae64f3 JJ |
2088 | } |
2089 | } | |
2090 | ||
2091 | if (old_tls_type != tls_type) | |
2092 | { | |
2093 | if (h != NULL) | |
2094 | elf_i386_hash_entry (h)->tls_type = tls_type; | |
2095 | else | |
2096 | elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
2097 | } | |
2098 | } | |
0ac8d2ca AM |
2099 | /* Fall through */ |
2100 | ||
2101 | case R_386_GOTOFF: | |
2102 | case R_386_GOTPC: | |
13ae64f3 | 2103 | create_got: |
6de2ae4a | 2104 | if (htab->elf.sgot == NULL) |
0ac8d2ca AM |
2105 | { |
2106 | if (htab->elf.dynobj == NULL) | |
2107 | htab->elf.dynobj = abfd; | |
6de2ae4a | 2108 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) |
c337a162 | 2109 | goto error_return; |
0ac8d2ca | 2110 | } |
37e55690 | 2111 | if (r_type != R_386_TLS_IE) |
aec6b87e L |
2112 | { |
2113 | if (eh != NULL) | |
2114 | eh->has_got_reloc = 1; | |
2115 | break; | |
2116 | } | |
37e55690 | 2117 | /* Fall through */ |
252b5132 | 2118 | |
37e55690 JJ |
2119 | case R_386_TLS_LE_32: |
2120 | case R_386_TLS_LE: | |
aec6b87e L |
2121 | if (eh != NULL) |
2122 | eh->has_got_reloc = 1; | |
0e1862bb | 2123 | if (bfd_link_executable (info)) |
37e55690 | 2124 | break; |
bffbf940 | 2125 | info->flags |= DF_STATIC_TLS; |
aec6b87e | 2126 | goto do_relocation; |
252b5132 RH |
2127 | |
2128 | case R_386_32: | |
2129 | case R_386_PC32: | |
aec6b87e L |
2130 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
2131 | eh->has_non_got_reloc = 1; | |
2132 | do_relocation: | |
bf52d7c7 L |
2133 | /* We are called after all symbols have been resolved. Only |
2134 | relocation against STT_GNU_IFUNC symbol must go through | |
2135 | PLT. */ | |
d1ed1c7d L |
2136 | if (h != NULL |
2137 | && (bfd_link_executable (info) | |
bf52d7c7 | 2138 | || h->type == STT_GNU_IFUNC)) |
6725bdbf | 2139 | { |
12d0ee4a | 2140 | /* If this reloc is in a read-only section, we might |
ebe50bae AM |
2141 | need a copy reloc. We can't check reliably at this |
2142 | stage whether the section is read-only, as input | |
2143 | sections have not yet been mapped to output sections. | |
2144 | Tentatively set the flag for now, and correct in | |
2145 | adjust_dynamic_symbol. */ | |
f5385ebf | 2146 | h->non_got_ref = 1; |
12d0ee4a | 2147 | |
233cc9c1 L |
2148 | /* We may need a .plt entry if the symbol is a function |
2149 | defined in a shared lib or is a STT_GNU_IFUNC function | |
2150 | referenced from the code or read-only section. */ | |
2151 | if (!h->def_regular | |
2152 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
2153 | h->plt.refcount += 1; | |
2154 | ||
4b627c18 L |
2155 | if (r_type == R_386_PC32) |
2156 | { | |
2157 | /* Since something like ".long foo - ." may be used | |
2158 | as pointer, make sure that PLT is used if foo is | |
2159 | a function defined in a shared library. */ | |
2160 | if ((sec->flags & SEC_CODE) == 0) | |
2161 | h->pointer_equality_needed = 1; | |
74437ea2 L |
2162 | else if (h->type == STT_GNU_IFUNC |
2163 | && bfd_link_pic (info)) | |
2164 | { | |
2165 | if (isym == NULL) | |
2166 | name = h->root.root.string; | |
2167 | else | |
2168 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
2169 | NULL); | |
4eca0228 | 2170 | _bfd_error_handler |
695344c0 | 2171 | /* xgettext:c-format */ |
74437ea2 L |
2172 | (_("%B: unsupported non-PIC call to IFUNC `%s'"), |
2173 | abfd, name); | |
2174 | bfd_set_error (bfd_error_bad_value); | |
2175 | goto error_return; | |
2176 | } | |
4b627c18 L |
2177 | } |
2178 | else | |
04ebc307 L |
2179 | { |
2180 | h->pointer_equality_needed = 1; | |
2181 | /* R_386_32 can be resolved at run-time. */ | |
2182 | if (r_type == R_386_32 | |
2183 | && (sec->flags & SEC_READONLY) == 0) | |
2184 | eh->func_pointer_refcount += 1; | |
2185 | } | |
6725bdbf | 2186 | } |
7843f00e | 2187 | |
06a6a421 | 2188 | size_reloc = FALSE; |
6a3e1bae | 2189 | do_size: |
252b5132 | 2190 | /* If we are creating a shared library, and this is a reloc |
f69da49f AM |
2191 | against a global symbol, or a non PC relative reloc |
2192 | against a local symbol, then we need to copy the reloc | |
2193 | into the shared library. However, if we are linking with | |
2194 | -Bsymbolic, we do not need to copy a reloc against a | |
2195 | global symbol which is defined in an object we are | |
2196 | including in the link (i.e., DEF_REGULAR is set). At | |
2197 | this point we have not seen all the input files, so it is | |
2198 | possible that DEF_REGULAR is not set now but will be set | |
1f655a09 L |
2199 | later (it is never cleared). In case of a weak definition, |
2200 | DEF_REGULAR may be cleared later by a strong definition in | |
ebe50bae | 2201 | a shared library. We account for that possibility below by |
1f655a09 L |
2202 | storing information in the relocs_copied field of the hash |
2203 | table entry. A similar situation occurs when creating | |
2204 | shared libraries and symbol visibility changes render the | |
12d0ee4a | 2205 | symbol local. |
56882138 | 2206 | |
12d0ee4a AM |
2207 | If on the other hand, we are creating an executable, we |
2208 | may need to keep relocations for symbols satisfied by a | |
2209 | dynamic library if we manage to avoid copy relocs for the | |
233cc9c1 L |
2210 | symbol. |
2211 | ||
2212 | Generate dynamic pointer relocation against STT_GNU_IFUNC | |
2213 | symbol in the non-code section. */ | |
081b1afe L |
2214 | if ((bfd_link_pic (info) |
2215 | && (r_type != R_386_PC32 | |
2216 | || (h != NULL | |
2217 | && (! (bfd_link_pie (info) | |
2218 | || SYMBOLIC_BIND (info, h)) | |
2219 | || h->root.type == bfd_link_hash_defweak | |
2220 | || !h->def_regular)))) | |
233cc9c1 L |
2221 | || (h != NULL |
2222 | && h->type == STT_GNU_IFUNC | |
2223 | && r_type == R_386_32 | |
2224 | && (sec->flags & SEC_CODE) == 0) | |
081b1afe L |
2225 | || (ELIMINATE_COPY_RELOCS |
2226 | && !bfd_link_pic (info) | |
2227 | && h != NULL | |
2228 | && (h->root.type == bfd_link_hash_defweak | |
2229 | || !h->def_regular))) | |
252b5132 | 2230 | { |
e03a8ed8 L |
2231 | struct elf_dyn_relocs *p; |
2232 | struct elf_dyn_relocs **head; | |
ec338859 | 2233 | |
12d0ee4a AM |
2234 | /* We must copy these reloc types into the output file. |
2235 | Create a reloc section in dynobj and make room for | |
2236 | this reloc. */ | |
252b5132 RH |
2237 | if (sreloc == NULL) |
2238 | { | |
0ac8d2ca AM |
2239 | if (htab->elf.dynobj == NULL) |
2240 | htab->elf.dynobj = abfd; | |
2241 | ||
83bac4b0 NC |
2242 | sreloc = _bfd_elf_make_dynamic_reloc_section |
2243 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE); | |
2244 | ||
252b5132 | 2245 | if (sreloc == NULL) |
c337a162 | 2246 | goto error_return; |
252b5132 RH |
2247 | } |
2248 | ||
0c715baa AM |
2249 | /* If this is a global symbol, we count the number of |
2250 | relocations we need for this symbol. */ | |
2251 | if (h != NULL) | |
252b5132 | 2252 | { |
d5597ebc | 2253 | head = &eh->dyn_relocs; |
0c715baa AM |
2254 | } |
2255 | else | |
2256 | { | |
ec338859 AM |
2257 | /* Track dynamic relocs needed for local syms too. |
2258 | We really need local syms available to do this | |
2259 | easily. Oh well. */ | |
87d72d41 | 2260 | void **vpp; |
ec338859 | 2261 | asection *s; |
87d72d41 AM |
2262 | |
2263 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2264 | abfd, r_symndx); | |
2265 | if (isym == NULL) | |
c337a162 | 2266 | goto error_return; |
87d72d41 AM |
2267 | |
2268 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
ec338859 | 2269 | if (s == NULL) |
87d72d41 | 2270 | s = sec; |
ec338859 | 2271 | |
e81d3500 | 2272 | vpp = &elf_section_data (s)->local_dynrel; |
e03a8ed8 | 2273 | head = (struct elf_dyn_relocs **)vpp; |
ec338859 AM |
2274 | } |
2275 | ||
2276 | p = *head; | |
2277 | if (p == NULL || p->sec != sec) | |
2278 | { | |
2279 | bfd_size_type amt = sizeof *p; | |
a50b1753 NC |
2280 | p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj, |
2281 | amt); | |
ec338859 | 2282 | if (p == NULL) |
c337a162 | 2283 | goto error_return; |
ec338859 AM |
2284 | p->next = *head; |
2285 | *head = p; | |
2286 | p->sec = sec; | |
2287 | p->count = 0; | |
2288 | p->pc_count = 0; | |
252b5132 | 2289 | } |
ec338859 AM |
2290 | |
2291 | p->count += 1; | |
06a6a421 L |
2292 | /* Count size relocation as PC-relative relocation. */ |
2293 | if (r_type == R_386_PC32 || size_reloc) | |
ec338859 | 2294 | p->pc_count += 1; |
252b5132 | 2295 | } |
252b5132 RH |
2296 | break; |
2297 | ||
2298 | /* This relocation describes the C++ object vtable hierarchy. | |
2299 | Reconstruct it for later use during GC. */ | |
2300 | case R_386_GNU_VTINHERIT: | |
d17e0c6e | 2301 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c337a162 | 2302 | goto error_return; |
252b5132 RH |
2303 | break; |
2304 | ||
2305 | /* This relocation describes which C++ vtable entries are actually | |
2306 | used. Record for later use during GC. */ | |
2307 | case R_386_GNU_VTENTRY: | |
c6aa130f MS |
2308 | BFD_ASSERT (h != NULL); |
2309 | if (h != NULL | |
2310 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) | |
c337a162 | 2311 | goto error_return; |
252b5132 RH |
2312 | break; |
2313 | ||
2314 | default: | |
2315 | break; | |
2316 | } | |
dd7e64d4 L |
2317 | |
2318 | if (use_plt_got | |
2319 | && h != NULL | |
2320 | && h->plt.refcount > 0 | |
8ded2ddc L |
2321 | && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
2322 | || h->got.refcount > 0) | |
dd7e64d4 L |
2323 | && htab->plt_got == NULL) |
2324 | { | |
2325 | /* Create the GOT procedure linkage table. */ | |
2326 | unsigned int plt_got_align; | |
2327 | const struct elf_backend_data *bed; | |
2328 | ||
2329 | bed = get_elf_backend_data (info->output_bfd); | |
2330 | BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8 | |
2331 | && (sizeof (elf_i386_got_plt_entry) | |
2332 | == sizeof (elf_i386_pic_got_plt_entry))); | |
2333 | plt_got_align = 3; | |
2334 | ||
2335 | if (htab->elf.dynobj == NULL) | |
2336 | htab->elf.dynobj = abfd; | |
2337 | htab->plt_got | |
2338 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
2339 | ".plt.got", | |
2340 | (bed->dynamic_sec_flags | |
2341 | | SEC_ALLOC | |
2342 | | SEC_CODE | |
2343 | | SEC_LOAD | |
2344 | | SEC_READONLY)); | |
2345 | if (htab->plt_got == NULL | |
2346 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
2347 | htab->plt_got, | |
2348 | plt_got_align)) | |
c337a162 | 2349 | goto error_return; |
dd7e64d4 | 2350 | } |
c1d11331 | 2351 | |
52bf37dd | 2352 | if (r_type == R_386_GOT32X |
c1d11331 | 2353 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
02a86693 | 2354 | sec->need_convert_load = 1; |
252b5132 RH |
2355 | } |
2356 | ||
bedfd056 L |
2357 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2358 | { | |
2359 | if (!info->keep_memory) | |
2360 | free (contents); | |
2361 | else | |
2362 | { | |
2363 | /* Cache the section contents for elf_link_input_bfd. */ | |
2364 | elf_section_data (sec)->this_hdr.contents = contents; | |
2365 | } | |
2366 | } | |
2367 | ||
b34976b6 | 2368 | return TRUE; |
c337a162 L |
2369 | |
2370 | error_return: | |
bedfd056 L |
2371 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2372 | free (contents); | |
c337a162 L |
2373 | sec->check_relocs_failed = 1; |
2374 | return FALSE; | |
252b5132 RH |
2375 | } |
2376 | ||
2377 | /* Return the section that should be marked against GC for a given | |
2378 | relocation. */ | |
2379 | ||
2380 | static asection * | |
55fd94b0 | 2381 | elf_i386_gc_mark_hook (asection *sec, |
07adf181 | 2382 | struct bfd_link_info *info, |
55fd94b0 AM |
2383 | Elf_Internal_Rela *rel, |
2384 | struct elf_link_hash_entry *h, | |
2385 | Elf_Internal_Sym *sym) | |
252b5132 RH |
2386 | { |
2387 | if (h != NULL) | |
07adf181 AM |
2388 | switch (ELF32_R_TYPE (rel->r_info)) |
2389 | { | |
2390 | case R_386_GNU_VTINHERIT: | |
2391 | case R_386_GNU_VTENTRY: | |
2392 | return NULL; | |
2393 | } | |
2394 | ||
2395 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
252b5132 RH |
2396 | } |
2397 | ||
aec6b87e L |
2398 | /* Remove undefined weak symbol from the dynamic symbol table if it |
2399 | is resolved to 0. */ | |
2400 | ||
2401 | static bfd_boolean | |
2402 | elf_i386_fixup_symbol (struct bfd_link_info *info, | |
2403 | struct elf_link_hash_entry *h) | |
2404 | { | |
2405 | if (h->dynindx != -1 | |
2406 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, | |
e62b9723 | 2407 | elf_i386_hash_entry (h)->has_got_reloc, |
aec6b87e L |
2408 | elf_i386_hash_entry (h))) |
2409 | { | |
2410 | h->dynindx = -1; | |
2411 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
2412 | h->dynstr_index); | |
2413 | } | |
2414 | return TRUE; | |
2415 | } | |
2416 | ||
252b5132 RH |
2417 | /* Adjust a symbol defined by a dynamic object and referenced by a |
2418 | regular object. The current definition is in some section of the | |
2419 | dynamic object, but we're not including those sections. We have to | |
2420 | change the definition to something the rest of the link can | |
2421 | understand. */ | |
2422 | ||
b34976b6 | 2423 | static bfd_boolean |
55fd94b0 AM |
2424 | elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info, |
2425 | struct elf_link_hash_entry *h) | |
252b5132 | 2426 | { |
6725bdbf | 2427 | struct elf_i386_link_hash_table *htab; |
5474d94f | 2428 | asection *s, *srel; |
5ca5bb35 L |
2429 | struct elf_i386_link_hash_entry *eh; |
2430 | struct elf_dyn_relocs *p; | |
252b5132 | 2431 | |
cbe950e9 L |
2432 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2433 | if (h->type == STT_GNU_IFUNC) | |
2434 | { | |
73bcf233 L |
2435 | /* All local STT_GNU_IFUNC references must be treate as local |
2436 | calls via local PLT. */ | |
5ca5bb35 L |
2437 | if (h->ref_regular |
2438 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2439 | { | |
73bcf233 | 2440 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2441 | struct elf_dyn_relocs **pp; |
2442 | ||
2443 | eh = (struct elf_i386_link_hash_entry *) h; | |
2444 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2445 | { | |
2446 | pc_count += p->pc_count; | |
2447 | p->count -= p->pc_count; | |
2448 | p->pc_count = 0; | |
73bcf233 | 2449 | count += p->count; |
5ca5bb35 L |
2450 | if (p->count == 0) |
2451 | *pp = p->next; | |
2452 | else | |
2453 | pp = &p->next; | |
2454 | } | |
2455 | ||
73bcf233 | 2456 | if (pc_count || count) |
5ca5bb35 | 2457 | { |
5ca5bb35 | 2458 | h->non_got_ref = 1; |
233cc9c1 L |
2459 | if (pc_count) |
2460 | { | |
2461 | /* Increment PLT reference count only for PC-relative | |
2462 | references. */ | |
2463 | h->needs_plt = 1; | |
2464 | if (h->plt.refcount <= 0) | |
2465 | h->plt.refcount = 1; | |
2466 | else | |
2467 | h->plt.refcount += 1; | |
2468 | } | |
5ca5bb35 L |
2469 | } |
2470 | } | |
2471 | ||
cbe950e9 L |
2472 | if (h->plt.refcount <= 0) |
2473 | { | |
2474 | h->plt.offset = (bfd_vma) -1; | |
2475 | h->needs_plt = 0; | |
2476 | } | |
2477 | return TRUE; | |
2478 | } | |
2479 | ||
252b5132 RH |
2480 | /* If this is a function, put it in the procedure linkage table. We |
2481 | will fill in the contents of the procedure linkage table later, | |
2482 | when we know the address of the .got section. */ | |
2483 | if (h->type == STT_FUNC | |
f5385ebf | 2484 | || h->needs_plt) |
252b5132 | 2485 | { |
6725bdbf | 2486 | if (h->plt.refcount <= 0 |
9c7a29a3 AM |
2487 | || SYMBOL_CALLS_LOCAL (info, h) |
2488 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2489 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
2490 | { |
2491 | /* This case can occur if we saw a PLT32 reloc in an input | |
dd5724d5 AM |
2492 | file, but the symbol was never referred to by a dynamic |
2493 | object, or if all references were garbage collected. In | |
2494 | such a case, we don't actually need to build a procedure | |
2495 | linkage table, and we can just do a PC32 reloc instead. */ | |
bbd7ec4a | 2496 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2497 | h->needs_plt = 0; |
252b5132 RH |
2498 | } |
2499 | ||
b34976b6 | 2500 | return TRUE; |
252b5132 | 2501 | } |
6725bdbf AM |
2502 | else |
2503 | /* It's possible that we incorrectly decided a .plt reloc was | |
2504 | needed for an R_386_PC32 reloc to a non-function sym in | |
2505 | check_relocs. We can't decide accurately between function and | |
2506 | non-function syms in check-relocs; Objects loaded later in | |
2507 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2508 | h->plt.offset = (bfd_vma) -1; |
252b5132 RH |
2509 | |
2510 | /* If this is a weak symbol, and there is a real definition, the | |
2511 | processor independent code will have arranged for us to see the | |
2512 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 2513 | if (h->u.weakdef != NULL) |
252b5132 | 2514 | { |
f6e332e6 AM |
2515 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2516 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2517 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2518 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
a23b6845 | 2519 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 2520 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 2521 | return TRUE; |
252b5132 RH |
2522 | } |
2523 | ||
2524 | /* This is a reference to a symbol defined by a dynamic object which | |
2525 | is not a function. */ | |
2526 | ||
2527 | /* If we are creating a shared library, we must presume that the | |
2528 | only references to the symbol are via the global offset table. | |
2529 | For such cases we need not do anything here; the relocations will | |
2530 | be handled correctly by relocate_section. */ | |
0e1862bb | 2531 | if (!bfd_link_executable (info)) |
b34976b6 | 2532 | return TRUE; |
252b5132 | 2533 | |
7843f00e | 2534 | /* If there are no references to this symbol that do not use the |
d5597ebc L |
2535 | GOT nor R_386_GOTOFF relocation, we don't need to generate a copy |
2536 | reloc. */ | |
2537 | eh = (struct elf_i386_link_hash_entry *) h; | |
2538 | if (!h->non_got_ref && !eh->gotoff_ref) | |
b34976b6 | 2539 | return TRUE; |
7843f00e | 2540 | |
8bd621d8 AM |
2541 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2542 | if (info->nocopyreloc) | |
2543 | { | |
f5385ebf | 2544 | h->non_got_ref = 0; |
b34976b6 | 2545 | return TRUE; |
8bd621d8 AM |
2546 | } |
2547 | ||
643796e3 | 2548 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
2549 | if (htab == NULL) |
2550 | return FALSE; | |
643796e3 | 2551 | |
d5597ebc L |
2552 | /* If there aren't any dynamic relocs in read-only sections nor |
2553 | R_386_GOTOFF relocation, then we can keep the dynamic relocs and | |
2554 | avoid the copy reloc. This doesn't work on VxWorks, where we can | |
2555 | not have dynamic relocations (other than copy and jump slot | |
2556 | relocations) in an executable. */ | |
23209a78 | 2557 | if (ELIMINATE_COPY_RELOCS |
d5597ebc | 2558 | && !eh->gotoff_ref |
23209a78 | 2559 | && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks) |
ebe50bae | 2560 | { |
a23b6845 AM |
2561 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2562 | { | |
2563 | s = p->sec->output_section; | |
2564 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2565 | break; | |
2566 | } | |
2567 | ||
a23b6845 AM |
2568 | if (p == NULL) |
2569 | { | |
f5385ebf | 2570 | h->non_got_ref = 0; |
a23b6845 AM |
2571 | return TRUE; |
2572 | } | |
ebe50bae AM |
2573 | } |
2574 | ||
252b5132 RH |
2575 | /* We must allocate the symbol in our .dynbss section, which will |
2576 | become part of the .bss section of the executable. There will be | |
2577 | an entry for this symbol in the .dynsym section. The dynamic | |
2578 | object will contain position independent code, so all references | |
2579 | from the dynamic object to this symbol will go through the global | |
2580 | offset table. The dynamic linker will use the .dynsym entry to | |
2581 | determine the address it must put in the global offset table, so | |
2582 | both the dynamic object and the regular object will refer to the | |
2583 | same memory location for the variable. */ | |
2584 | ||
252b5132 RH |
2585 | /* We must generate a R_386_COPY reloc to tell the dynamic linker to |
2586 | copy the initial value out of the dynamic object and into the | |
0ac8d2ca | 2587 | runtime process image. */ |
5474d94f AM |
2588 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
2589 | { | |
2590 | s = htab->elf.sdynrelro; | |
2591 | srel = htab->elf.sreldynrelro; | |
2592 | } | |
2593 | else | |
2594 | { | |
2595 | s = htab->elf.sdynbss; | |
2596 | srel = htab->elf.srelbss; | |
2597 | } | |
1d7e9d18 | 2598 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
252b5132 | 2599 | { |
5474d94f | 2600 | srel->size += sizeof (Elf32_External_Rel); |
f5385ebf | 2601 | h->needs_copy = 1; |
252b5132 RH |
2602 | } |
2603 | ||
6cabe1ea | 2604 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
252b5132 RH |
2605 | } |
2606 | ||
6725bdbf | 2607 | /* Allocate space in .plt, .got and associated reloc sections for |
0c715baa | 2608 | dynamic relocs. */ |
6725bdbf | 2609 | |
b34976b6 | 2610 | static bfd_boolean |
eb4ff4d6 | 2611 | elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
6725bdbf AM |
2612 | { |
2613 | struct bfd_link_info *info; | |
2614 | struct elf_i386_link_hash_table *htab; | |
5a15f56f | 2615 | struct elf_i386_link_hash_entry *eh; |
e03a8ed8 | 2616 | struct elf_dyn_relocs *p; |
25e762b9 | 2617 | unsigned plt_entry_size; |
aec6b87e | 2618 | bfd_boolean resolved_to_zero; |
6725bdbf | 2619 | |
e92d460e | 2620 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2621 | return TRUE; |
6725bdbf | 2622 | |
cbe950e9 | 2623 | eh = (struct elf_i386_link_hash_entry *) h; |
e92d460e | 2624 | |
6725bdbf AM |
2625 | info = (struct bfd_link_info *) inf; |
2626 | htab = elf_i386_hash_table (info); | |
4dfe6ac6 NC |
2627 | if (htab == NULL) |
2628 | return FALSE; | |
6725bdbf | 2629 | |
25e762b9 RM |
2630 | plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
2631 | ||
e62b9723 L |
2632 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
2633 | eh->has_got_reloc, | |
2634 | eh); | |
aec6b87e | 2635 | |
04ebc307 L |
2636 | /* Clear the reference count of function pointer relocations if |
2637 | symbol isn't a normal function. */ | |
2638 | if (h->type != STT_FUNC) | |
2639 | eh->func_pointer_refcount = 0; | |
2640 | ||
dd7e64d4 L |
2641 | /* We can't use the GOT PLT if pointer equality is needed since |
2642 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
2643 | linker won't update the GOT slot. We will get into an infinite | |
2644 | loop at run-time. */ | |
2645 | if (htab->plt_got != NULL | |
2646 | && h->type != STT_GNU_IFUNC | |
2647 | && !h->pointer_equality_needed | |
2648 | && h->plt.refcount > 0 | |
2649 | && h->got.refcount > 0) | |
2650 | { | |
2651 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
2652 | reloctions. */ | |
2653 | h->plt.offset = (bfd_vma) -1; | |
2654 | ||
2655 | /* Use the GOT PLT. */ | |
2656 | eh->plt_got.refcount = 1; | |
2657 | } | |
2658 | ||
cbe950e9 L |
2659 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2660 | here if it is defined and referenced in a non-shared object. */ | |
2661 | if (h->type == STT_GNU_IFUNC | |
2662 | && h->def_regular) | |
25e762b9 | 2663 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs, |
2df3368d L |
2664 | &htab->readonly_dynrelocs_against_ifunc, |
2665 | plt_entry_size, | |
233cc9c1 | 2666 | plt_entry_size, 4, TRUE); |
04ebc307 L |
2667 | /* Don't create the PLT entry if there are only function pointer |
2668 | relocations which can be resolved at run-time. */ | |
cbe950e9 | 2669 | else if (htab->elf.dynamic_sections_created |
04ebc307 L |
2670 | && (h->plt.refcount > eh->func_pointer_refcount |
2671 | || eh->plt_got.refcount > 0)) | |
6725bdbf | 2672 | { |
25070364 L |
2673 | bfd_boolean use_plt_got; |
2674 | ||
04ebc307 L |
2675 | /* Clear the reference count of function pointer relocations |
2676 | if PLT is used. */ | |
2677 | eh->func_pointer_refcount = 0; | |
2678 | ||
8ded2ddc | 2679 | if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
25070364 L |
2680 | { |
2681 | /* Don't use the regular PLT for DF_BIND_NOW. */ | |
2682 | h->plt.offset = (bfd_vma) -1; | |
2683 | ||
2684 | /* Use the GOT PLT. */ | |
2685 | h->got.refcount = 1; | |
2686 | eh->plt_got.refcount = 1; | |
2687 | } | |
2688 | ||
2689 | use_plt_got = eh->plt_got.refcount > 0; | |
dd7e64d4 | 2690 | |
5a15f56f AM |
2691 | /* Make sure this symbol is output as a dynamic symbol. |
2692 | Undefined weak syms won't yet be marked as dynamic. */ | |
2693 | if (h->dynindx == -1 | |
aec6b87e L |
2694 | && !h->forced_local |
2695 | && !resolved_to_zero) | |
5a15f56f | 2696 | { |
c152c796 | 2697 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2698 | return FALSE; |
5a15f56f AM |
2699 | } |
2700 | ||
0e1862bb | 2701 | if (bfd_link_pic (info) |
4e795f50 | 2702 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
ced53ee5 | 2703 | { |
6de2ae4a | 2704 | asection *s = htab->elf.splt; |
dd7e64d4 | 2705 | asection *got_s = htab->plt_got; |
6725bdbf | 2706 | |
7c1e8d3e L |
2707 | /* If this is the first .plt entry, make room for the special |
2708 | first entry. The .plt section is used by prelink to undo | |
2709 | prelinking for dynamic relocations. */ | |
2710 | if (s->size == 0) | |
2711 | s->size = plt_entry_size; | |
2712 | ||
dd7e64d4 L |
2713 | if (use_plt_got) |
2714 | eh->plt_got.offset = got_s->size; | |
2715 | else | |
7c1e8d3e | 2716 | h->plt.offset = s->size; |
6725bdbf | 2717 | |
ced53ee5 AM |
2718 | /* If this symbol is not defined in a regular file, and we are |
2719 | not generating a shared library, then set the symbol to this | |
2720 | location in the .plt. This is required to make function | |
2721 | pointers compare as equal between the normal executable and | |
2722 | the shared library. */ | |
0e1862bb | 2723 | if (! bfd_link_pic (info) |
f5385ebf | 2724 | && !h->def_regular) |
ced53ee5 | 2725 | { |
dd7e64d4 L |
2726 | if (use_plt_got) |
2727 | { | |
2728 | /* We need to make a call to the entry of the GOT PLT | |
2729 | instead of regular PLT entry. */ | |
2730 | h->root.u.def.section = got_s; | |
2731 | h->root.u.def.value = eh->plt_got.offset; | |
2732 | } | |
2733 | else | |
2734 | { | |
2735 | h->root.u.def.section = s; | |
2736 | h->root.u.def.value = h->plt.offset; | |
2737 | } | |
ced53ee5 | 2738 | } |
6725bdbf | 2739 | |
ced53ee5 | 2740 | /* Make room for this entry. */ |
dd7e64d4 L |
2741 | if (use_plt_got) |
2742 | got_s->size += sizeof (elf_i386_got_plt_entry); | |
2743 | else | |
2744 | { | |
2745 | s->size += plt_entry_size; | |
6725bdbf | 2746 | |
dd7e64d4 L |
2747 | /* We also need to make an entry in the .got.plt section, |
2748 | which will be placed in the .got section by the linker | |
2749 | script. */ | |
2750 | htab->elf.sgotplt->size += 4; | |
6725bdbf | 2751 | |
aec6b87e L |
2752 | /* There should be no PLT relocation against resolved |
2753 | undefined weak symbol in executable. */ | |
2754 | if (!resolved_to_zero) | |
2755 | { | |
2756 | /* We also need to make an entry in the .rel.plt | |
2757 | section. */ | |
2758 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); | |
2759 | htab->elf.srelplt->reloc_count++; | |
2760 | } | |
dd7e64d4 | 2761 | } |
eac338cf | 2762 | |
23209a78 | 2763 | if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks |
0e1862bb | 2764 | && !bfd_link_pic (info)) |
eac338cf PB |
2765 | { |
2766 | /* VxWorks has a second set of relocations for each PLT entry | |
2767 | in executables. They go in a separate relocation section, | |
2768 | which is processed by the kernel loader. */ | |
2769 | ||
2770 | /* There are two relocations for the initial PLT entry: an | |
2771 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an | |
2772 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
2773 | ||
25e762b9 | 2774 | if (h->plt.offset == plt_entry_size) |
eac338cf PB |
2775 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); |
2776 | ||
2777 | /* There are two extra relocations for each subsequent PLT entry: | |
2778 | an R_386_32 relocation for the GOT entry, and an R_386_32 | |
2779 | relocation for the PLT entry. */ | |
2780 | ||
2781 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); | |
2782 | } | |
6725bdbf | 2783 | } |
ced53ee5 AM |
2784 | else |
2785 | { | |
13f42277 | 2786 | eh->plt_got.offset = (bfd_vma) -1; |
51b64d56 | 2787 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2788 | h->needs_plt = 0; |
ced53ee5 | 2789 | } |
6725bdbf AM |
2790 | } |
2791 | else | |
2792 | { | |
13f42277 | 2793 | eh->plt_got.offset = (bfd_vma) -1; |
51b64d56 | 2794 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2795 | h->needs_plt = 0; |
6725bdbf AM |
2796 | } |
2797 | ||
67a4f2b7 AO |
2798 | eh->tlsdesc_got = (bfd_vma) -1; |
2799 | ||
37e55690 | 2800 | /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary, |
13ae64f3 JJ |
2801 | make it a R_386_TLS_LE_32 requiring no TLS entry. */ |
2802 | if (h->got.refcount > 0 | |
0e1862bb | 2803 | && bfd_link_executable (info) |
13ae64f3 | 2804 | && h->dynindx == -1 |
37e55690 | 2805 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE)) |
cedb70c5 | 2806 | h->got.offset = (bfd_vma) -1; |
13ae64f3 | 2807 | else if (h->got.refcount > 0) |
6725bdbf | 2808 | { |
0ac8d2ca | 2809 | asection *s; |
b34976b6 | 2810 | bfd_boolean dyn; |
13ae64f3 | 2811 | int tls_type = elf_i386_hash_entry(h)->tls_type; |
6725bdbf | 2812 | |
5a15f56f AM |
2813 | /* Make sure this symbol is output as a dynamic symbol. |
2814 | Undefined weak syms won't yet be marked as dynamic. */ | |
2815 | if (h->dynindx == -1 | |
aec6b87e L |
2816 | && !h->forced_local |
2817 | && !resolved_to_zero) | |
5a15f56f | 2818 | { |
c152c796 | 2819 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2820 | return FALSE; |
5a15f56f AM |
2821 | } |
2822 | ||
6de2ae4a | 2823 | s = htab->elf.sgot; |
67a4f2b7 AO |
2824 | if (GOT_TLS_GDESC_P (tls_type)) |
2825 | { | |
6de2ae4a | 2826 | eh->tlsdesc_got = htab->elf.sgotplt->size |
67a4f2b7 | 2827 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 2828 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
2829 | h->got.offset = (bfd_vma) -2; |
2830 | } | |
2831 | if (! GOT_TLS_GDESC_P (tls_type) | |
2832 | || GOT_TLS_GD_P (tls_type)) | |
2833 | { | |
2834 | h->got.offset = s->size; | |
2835 | s->size += 4; | |
2836 | /* R_386_TLS_GD needs 2 consecutive GOT slots. */ | |
2837 | if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH) | |
2838 | s->size += 4; | |
2839 | } | |
ebe50bae | 2840 | dyn = htab->elf.dynamic_sections_created; |
13ae64f3 | 2841 | /* R_386_TLS_IE_32 needs one dynamic relocation, |
37e55690 JJ |
2842 | R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation, |
2843 | (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we | |
2844 | need two), R_386_TLS_GD needs one if local symbol and two if | |
aec6b87e L |
2845 | global. No dynamic relocation against resolved undefined weak |
2846 | symbol in executable. */ | |
37e55690 | 2847 | if (tls_type == GOT_TLS_IE_BOTH) |
6de2ae4a | 2848 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 | 2849 | else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
37e55690 | 2850 | || (tls_type & GOT_TLS_IE)) |
6de2ae4a | 2851 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2852 | else if (GOT_TLS_GD_P (tls_type)) |
6de2ae4a | 2853 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 | 2854 | else if (! GOT_TLS_GDESC_P (tls_type) |
aec6b87e L |
2855 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
2856 | && !resolved_to_zero) | |
67a4f2b7 | 2857 | || h->root.type != bfd_link_hash_undefweak) |
0e1862bb | 2858 | && (bfd_link_pic (info) |
ef5aade5 | 2859 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
6de2ae4a | 2860 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2861 | if (GOT_TLS_GDESC_P (tls_type)) |
6de2ae4a | 2862 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
6725bdbf AM |
2863 | } |
2864 | else | |
51b64d56 | 2865 | h->got.offset = (bfd_vma) -1; |
6725bdbf | 2866 | |
5a15f56f | 2867 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2868 | return TRUE; |
5a15f56f | 2869 | |
0c715baa AM |
2870 | /* In the shared -Bsymbolic case, discard space allocated for |
2871 | dynamic pc-relative relocs against symbols which turn out to be | |
2872 | defined in regular objects. For the normal shared case, discard | |
0ac8d2ca AM |
2873 | space for pc-relative relocs that have become local due to symbol |
2874 | visibility changes. */ | |
0c715baa | 2875 | |
0e1862bb | 2876 | if (bfd_link_pic (info)) |
5a15f56f | 2877 | { |
09695f56 AM |
2878 | /* The only reloc that uses pc_count is R_386_PC32, which will |
2879 | appear on a call or on something like ".long foo - .". We | |
2880 | want calls to protected symbols to resolve directly to the | |
2881 | function rather than going via the plt. If people want | |
2882 | function pointer comparisons to work as expected then they | |
2883 | should avoid writing assembly like ".long foo - .". */ | |
2884 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
5a15f56f | 2885 | { |
e03a8ed8 | 2886 | struct elf_dyn_relocs **pp; |
0c715baa AM |
2887 | |
2888 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2889 | { | |
c3ce498c L |
2890 | p->count -= p->pc_count; |
2891 | p->pc_count = 0; | |
0c715baa AM |
2892 | if (p->count == 0) |
2893 | *pp = p->next; | |
2894 | else | |
2895 | pp = &p->next; | |
2896 | } | |
5a15f56f | 2897 | } |
4e795f50 | 2898 | |
23209a78 | 2899 | if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks) |
3348747a | 2900 | { |
e03a8ed8 | 2901 | struct elf_dyn_relocs **pp; |
3348747a NS |
2902 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
2903 | { | |
2904 | if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) | |
2905 | *pp = p->next; | |
2906 | else | |
2907 | pp = &p->next; | |
2908 | } | |
2909 | } | |
2910 | ||
4e795f50 | 2911 | /* Also discard relocs on undefined weak syms with non-default |
aec6b87e | 2912 | visibility or in PIE. */ |
22d606e9 | 2913 | if (eh->dyn_relocs != NULL |
c353e543 | 2914 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 | 2915 | { |
aec6b87e L |
2916 | /* Undefined weak symbol is never bound locally in shared |
2917 | library. */ | |
2918 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2919 | || resolved_to_zero) | |
2920 | { | |
2921 | if (h->non_got_ref) | |
2922 | { | |
2923 | /* Keep dynamic non-GOT/non-PLT relocation so that we | |
2924 | can branch to 0 without PLT. */ | |
2925 | struct elf_dyn_relocs **pp; | |
2926 | ||
2927 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2928 | if (p->pc_count == 0) | |
2929 | *pp = p->next; | |
2930 | else | |
2931 | { | |
2932 | /* Remove non-R_386_PC32 relocation. */ | |
2933 | p->count = p->pc_count; | |
2934 | pp = &p->next; | |
2935 | } | |
22d606e9 | 2936 | |
aec6b87e L |
2937 | if (eh->dyn_relocs != NULL) |
2938 | { | |
2939 | /* Make sure undefined weak symbols are output | |
2940 | as dynamic symbols in PIEs for dynamic non-GOT | |
2941 | non-PLT reloations. */ | |
2942 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2943 | return FALSE; | |
2944 | } | |
2945 | } | |
2946 | else | |
2947 | eh->dyn_relocs = NULL; | |
2948 | } | |
22d606e9 AM |
2949 | else if (h->dynindx == -1 |
2950 | && !h->forced_local) | |
2951 | { | |
2952 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2953 | return FALSE; | |
2954 | } | |
2955 | } | |
0c715baa | 2956 | } |
a23b6845 | 2957 | else if (ELIMINATE_COPY_RELOCS) |
0c715baa AM |
2958 | { |
2959 | /* For the non-shared case, discard space for relocs against | |
2960 | symbols which turn out to need copy relocs or are not | |
04ebc307 L |
2961 | dynamic. Keep dynamic relocations for run-time function |
2962 | pointer initialization. */ | |
0c715baa | 2963 | |
aec6b87e L |
2964 | if ((!h->non_got_ref |
2965 | || eh->func_pointer_refcount > 0 | |
2966 | || (h->root.type == bfd_link_hash_undefweak | |
2967 | && !resolved_to_zero)) | |
f5385ebf AM |
2968 | && ((h->def_dynamic |
2969 | && !h->def_regular) | |
ebe50bae | 2970 | || (htab->elf.dynamic_sections_created |
0c715baa AM |
2971 | && (h->root.type == bfd_link_hash_undefweak |
2972 | || h->root.type == bfd_link_hash_undefined)))) | |
2973 | { | |
2974 | /* Make sure this symbol is output as a dynamic symbol. | |
2975 | Undefined weak syms won't yet be marked as dynamic. */ | |
2976 | if (h->dynindx == -1 | |
aec6b87e L |
2977 | && !h->forced_local |
2978 | && !resolved_to_zero) | |
0c715baa | 2979 | { |
c152c796 | 2980 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2981 | return FALSE; |
0c715baa | 2982 | } |
5a15f56f | 2983 | |
0c715baa AM |
2984 | /* If that succeeded, we know we'll be keeping all the |
2985 | relocs. */ | |
2986 | if (h->dynindx != -1) | |
2987 | goto keep; | |
2988 | } | |
2989 | ||
2990 | eh->dyn_relocs = NULL; | |
04ebc307 | 2991 | eh->func_pointer_refcount = 0; |
0c715baa | 2992 | |
ec338859 | 2993 | keep: ; |
5a15f56f AM |
2994 | } |
2995 | ||
0c715baa AM |
2996 | /* Finally, allocate space. */ |
2997 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
12d0ee4a | 2998 | { |
e7c33416 NC |
2999 | asection *sreloc; |
3000 | ||
cbe950e9 | 3001 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
3002 | |
3003 | BFD_ASSERT (sreloc != NULL); | |
eea6121a | 3004 | sreloc->size += p->count * sizeof (Elf32_External_Rel); |
12d0ee4a AM |
3005 | } |
3006 | ||
b34976b6 | 3007 | return TRUE; |
6725bdbf AM |
3008 | } |
3009 | ||
c25bc9fc L |
3010 | /* Allocate space in .plt, .got and associated reloc sections for |
3011 | local dynamic relocs. */ | |
3012 | ||
3013 | static bfd_boolean | |
3014 | elf_i386_allocate_local_dynrelocs (void **slot, void *inf) | |
3015 | { | |
3016 | struct elf_link_hash_entry *h | |
3017 | = (struct elf_link_hash_entry *) *slot; | |
3018 | ||
3019 | if (h->type != STT_GNU_IFUNC | |
3020 | || !h->def_regular | |
3021 | || !h->ref_regular | |
3022 | || !h->forced_local | |
3023 | || h->root.type != bfd_link_hash_defined) | |
3024 | abort (); | |
3025 | ||
3026 | return elf_i386_allocate_dynrelocs (h, inf); | |
3027 | } | |
3028 | ||
0c715baa AM |
3029 | /* Find any dynamic relocs that apply to read-only sections. */ |
3030 | ||
b34976b6 | 3031 | static bfd_boolean |
eb4ff4d6 | 3032 | elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
0c715baa AM |
3033 | { |
3034 | struct elf_i386_link_hash_entry *eh; | |
e03a8ed8 | 3035 | struct elf_dyn_relocs *p; |
0c715baa | 3036 | |
aa715242 L |
3037 | /* Skip local IFUNC symbols. */ |
3038 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
3039 | return TRUE; | |
3040 | ||
0c715baa AM |
3041 | eh = (struct elf_i386_link_hash_entry *) h; |
3042 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
3043 | { | |
3044 | asection *s = p->sec->output_section; | |
3045 | ||
3046 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
3047 | { | |
3048 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
3049 | ||
3050 | info->flags |= DF_TEXTREL; | |
3051 | ||
0e1862bb | 3052 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd | 3053 | || info->error_textrel) |
695344c0 | 3054 | /* xgettext:c-format */ |
1952c5cd | 3055 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"), |
b70321a2 L |
3056 | p->sec->owner, h->root.root.string, |
3057 | p->sec); | |
3058 | ||
0c715baa | 3059 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 3060 | return FALSE; |
0c715baa AM |
3061 | } |
3062 | } | |
b34976b6 | 3063 | return TRUE; |
0c715baa AM |
3064 | } |
3065 | ||
c175a657 | 3066 | /* Convert load via the GOT slot to load immediate. */ |
daa67607 L |
3067 | |
3068 | static bfd_boolean | |
02a86693 | 3069 | elf_i386_convert_load (bfd *abfd, asection *sec, |
a6af384b | 3070 | struct bfd_link_info *link_info) |
daa67607 | 3071 | { |
c175a657 | 3072 | struct elf_i386_link_hash_table *htab; |
daa67607 L |
3073 | Elf_Internal_Shdr *symtab_hdr; |
3074 | Elf_Internal_Rela *internal_relocs; | |
3075 | Elf_Internal_Rela *irel, *irelend; | |
3076 | bfd_byte *contents; | |
c175a657 | 3077 | bfd_boolean changed; |
daa67607 L |
3078 | bfd_signed_vma *local_got_refcounts; |
3079 | ||
3080 | /* Don't even try to convert non-ELF outputs. */ | |
3081 | if (!is_elf_hash_table (link_info->hash)) | |
3082 | return FALSE; | |
3083 | ||
c1d11331 | 3084 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 3085 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
02a86693 | 3086 | || sec->need_convert_load == 0 |
c8831961 | 3087 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
3088 | return TRUE; |
3089 | ||
3090 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3091 | ||
3092 | /* Load the relocations for this section. */ | |
3093 | internal_relocs = (_bfd_elf_link_read_relocs | |
3094 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
3095 | link_info->keep_memory)); | |
3096 | if (internal_relocs == NULL) | |
3097 | return FALSE; | |
3098 | ||
c175a657 | 3099 | changed = FALSE; |
daa67607 | 3100 | htab = elf_i386_hash_table (link_info); |
daa67607 L |
3101 | local_got_refcounts = elf_local_got_refcounts (abfd); |
3102 | ||
3103 | /* Get the section contents. */ | |
3104 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
3105 | contents = elf_section_data (sec)->this_hdr.contents; | |
3106 | else | |
3107 | { | |
3108 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
3109 | goto error_return; | |
3110 | } | |
3111 | ||
3112 | irelend = internal_relocs + sec->reloc_count; | |
3113 | for (irel = internal_relocs; irel < irelend; irel++) | |
3114 | { | |
3115 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
c175a657 | 3116 | unsigned int r_symndx; |
daa67607 | 3117 | struct elf_link_hash_entry *h; |
c175a657 | 3118 | bfd_boolean converted; |
daa67607 | 3119 | |
7d4d9709 L |
3120 | /* Don't convert R_386_GOT32 since we can't tell if it is applied |
3121 | to "mov $foo@GOT, %reg" which isn't a load via GOT. */ | |
3122 | if (r_type != R_386_GOT32X) | |
daa67607 L |
3123 | continue; |
3124 | ||
c175a657 | 3125 | r_symndx = ELF32_R_SYM (irel->r_info); |
02a86693 | 3126 | if (r_symndx < symtab_hdr->sh_info) |
c175a657 L |
3127 | h = elf_i386_get_local_sym_hash (htab, sec->owner, |
3128 | (const Elf_Internal_Rela *) irel, | |
3129 | FALSE); | |
3130 | else | |
02a86693 | 3131 | { |
c175a657 L |
3132 | h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info]; |
3133 | while (h->root.type == bfd_link_hash_indirect | |
3134 | || h->root.type == bfd_link_hash_warning) | |
3135 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
daa67607 L |
3136 | } |
3137 | ||
02a86693 | 3138 | /* STT_GNU_IFUNC must keep GOT32 relocations. */ |
c175a657 | 3139 | if (h != NULL && h->type == STT_GNU_IFUNC) |
02a86693 L |
3140 | continue; |
3141 | ||
c175a657 L |
3142 | converted = FALSE; |
3143 | if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents, | |
3144 | irel, h, &converted, link_info)) | |
3145 | goto error_return; | |
bae420ef | 3146 | |
c175a657 | 3147 | if (converted) |
02a86693 | 3148 | { |
c175a657 L |
3149 | changed = converted; |
3150 | if (h) | |
02a86693 | 3151 | { |
c175a657 L |
3152 | if (h->got.refcount > 0) |
3153 | h->got.refcount -= 1; | |
02a86693 | 3154 | } |
c175a657 | 3155 | else |
02a86693 | 3156 | { |
c175a657 L |
3157 | if (local_got_refcounts != NULL |
3158 | && local_got_refcounts[r_symndx] > 0) | |
3159 | local_got_refcounts[r_symndx] -= 1; | |
02a86693 | 3160 | } |
daa67607 L |
3161 | } |
3162 | } | |
3163 | ||
3164 | if (contents != NULL | |
3165 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3166 | { | |
c175a657 | 3167 | if (!changed && !link_info->keep_memory) |
daa67607 L |
3168 | free (contents); |
3169 | else | |
3170 | { | |
3171 | /* Cache the section contents for elf_link_input_bfd. */ | |
3172 | elf_section_data (sec)->this_hdr.contents = contents; | |
3173 | } | |
3174 | } | |
3175 | ||
3176 | if (elf_section_data (sec)->relocs != internal_relocs) | |
3177 | { | |
c175a657 | 3178 | if (!changed) |
daa67607 L |
3179 | free (internal_relocs); |
3180 | else | |
3181 | elf_section_data (sec)->relocs = internal_relocs; | |
3182 | } | |
3183 | ||
3184 | return TRUE; | |
3185 | ||
3186 | error_return: | |
3187 | if (contents != NULL | |
3188 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3189 | free (contents); | |
3190 | if (internal_relocs != NULL | |
3191 | && elf_section_data (sec)->relocs != internal_relocs) | |
3192 | free (internal_relocs); | |
3193 | return FALSE; | |
3194 | } | |
3195 | ||
252b5132 RH |
3196 | /* Set the sizes of the dynamic sections. */ |
3197 | ||
b34976b6 | 3198 | static bfd_boolean |
23209a78 | 3199 | elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
252b5132 | 3200 | { |
6725bdbf | 3201 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
3202 | bfd *dynobj; |
3203 | asection *s; | |
b34976b6 | 3204 | bfd_boolean relocs; |
0c715baa | 3205 | bfd *ibfd; |
252b5132 | 3206 | |
6725bdbf | 3207 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
3208 | if (htab == NULL) |
3209 | return FALSE; | |
ebe50bae | 3210 | dynobj = htab->elf.dynobj; |
ffb2e45b AM |
3211 | if (dynobj == NULL) |
3212 | abort (); | |
252b5132 | 3213 | |
0c715baa AM |
3214 | /* Set up .got offsets for local syms, and space for local dynamic |
3215 | relocs. */ | |
c72f2fb2 | 3216 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
161d71a6 L |
3217 | { |
3218 | bfd_signed_vma *local_got; | |
3219 | bfd_signed_vma *end_local_got; | |
13ae64f3 | 3220 | char *local_tls_type; |
67a4f2b7 | 3221 | bfd_vma *local_tlsdesc_gotent; |
161d71a6 L |
3222 | bfd_size_type locsymcount; |
3223 | Elf_Internal_Shdr *symtab_hdr; | |
3224 | asection *srel; | |
6725bdbf | 3225 | |
0ffa91dd | 3226 | if (! is_i386_elf (ibfd)) |
161d71a6 | 3227 | continue; |
6725bdbf | 3228 | |
0c715baa AM |
3229 | for (s = ibfd->sections; s != NULL; s = s->next) |
3230 | { | |
e03a8ed8 | 3231 | struct elf_dyn_relocs *p; |
0c715baa | 3232 | |
02a86693 | 3233 | if (!elf_i386_convert_load (ibfd, s, info)) |
daa67607 L |
3234 | return FALSE; |
3235 | ||
e03a8ed8 | 3236 | for (p = ((struct elf_dyn_relocs *) |
e81d3500 | 3237 | elf_section_data (s)->local_dynrel); |
ec338859 AM |
3238 | p != NULL; |
3239 | p = p->next) | |
0c715baa | 3240 | { |
ec338859 AM |
3241 | if (!bfd_is_abs_section (p->sec) |
3242 | && bfd_is_abs_section (p->sec->output_section)) | |
3243 | { | |
3244 | /* Input section has been discarded, either because | |
3245 | it is a copy of a linkonce section or due to | |
3246 | linker script /DISCARD/, so we'll be discarding | |
3247 | the relocs too. */ | |
3248 | } | |
23209a78 | 3249 | else if (get_elf_i386_backend_data (output_bfd)->is_vxworks |
3348747a NS |
3250 | && strcmp (p->sec->output_section->name, |
3251 | ".tls_vars") == 0) | |
3252 | { | |
3253 | /* Relocations in vxworks .tls_vars sections are | |
3254 | handled specially by the loader. */ | |
3255 | } | |
248866a8 | 3256 | else if (p->count != 0) |
ec338859 AM |
3257 | { |
3258 | srel = elf_section_data (p->sec)->sreloc; | |
eea6121a | 3259 | srel->size += p->count * sizeof (Elf32_External_Rel); |
4b819e1f L |
3260 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
3261 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
3262 | { |
3263 | info->flags |= DF_TEXTREL; | |
0e1862bb | 3264 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd | 3265 | || info->error_textrel) |
695344c0 | 3266 | /* xgettext:c-format */ |
1952c5cd | 3267 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), |
b70321a2 | 3268 | p->sec->owner, p->sec); |
b70321a2 | 3269 | } |
ec338859 | 3270 | } |
0c715baa AM |
3271 | } |
3272 | } | |
3273 | ||
3274 | local_got = elf_local_got_refcounts (ibfd); | |
161d71a6 L |
3275 | if (!local_got) |
3276 | continue; | |
6725bdbf | 3277 | |
0ffa91dd | 3278 | symtab_hdr = &elf_symtab_hdr (ibfd); |
161d71a6 L |
3279 | locsymcount = symtab_hdr->sh_info; |
3280 | end_local_got = local_got + locsymcount; | |
13ae64f3 | 3281 | local_tls_type = elf_i386_local_got_tls_type (ibfd); |
67a4f2b7 | 3282 | local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd); |
6de2ae4a L |
3283 | s = htab->elf.sgot; |
3284 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
3285 | for (; local_got < end_local_got; |
3286 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
161d71a6 | 3287 | { |
67a4f2b7 | 3288 | *local_tlsdesc_gotent = (bfd_vma) -1; |
161d71a6 | 3289 | if (*local_got > 0) |
6725bdbf | 3290 | { |
67a4f2b7 AO |
3291 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
3292 | { | |
6de2ae4a | 3293 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
67a4f2b7 | 3294 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 3295 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
3296 | *local_got = (bfd_vma) -2; |
3297 | } | |
3298 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3299 | || GOT_TLS_GD_P (*local_tls_type)) | |
3300 | { | |
3301 | *local_got = s->size; | |
3302 | s->size += 4; | |
3303 | if (GOT_TLS_GD_P (*local_tls_type) | |
3304 | || *local_tls_type == GOT_TLS_IE_BOTH) | |
3305 | s->size += 4; | |
3306 | } | |
0e1862bb | 3307 | if (bfd_link_pic (info) |
67a4f2b7 | 3308 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
37e55690 JJ |
3309 | || (*local_tls_type & GOT_TLS_IE)) |
3310 | { | |
3311 | if (*local_tls_type == GOT_TLS_IE_BOTH) | |
eea6121a | 3312 | srel->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
3313 | else if (GOT_TLS_GD_P (*local_tls_type) |
3314 | || ! GOT_TLS_GDESC_P (*local_tls_type)) | |
eea6121a | 3315 | srel->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 3316 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
6de2ae4a | 3317 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
37e55690 | 3318 | } |
6725bdbf | 3319 | } |
161d71a6 L |
3320 | else |
3321 | *local_got = (bfd_vma) -1; | |
6725bdbf | 3322 | } |
252b5132 | 3323 | } |
6725bdbf | 3324 | |
13ae64f3 JJ |
3325 | if (htab->tls_ldm_got.refcount > 0) |
3326 | { | |
3327 | /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM | |
3328 | relocs. */ | |
6de2ae4a L |
3329 | htab->tls_ldm_got.offset = htab->elf.sgot->size; |
3330 | htab->elf.sgot->size += 8; | |
3331 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); | |
13ae64f3 JJ |
3332 | } |
3333 | else | |
3334 | htab->tls_ldm_got.offset = -1; | |
3335 | ||
0c715baa AM |
3336 | /* Allocate global sym .plt and .got entries, and space for global |
3337 | sym dynamic relocs. */ | |
eb4ff4d6 | 3338 | elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info); |
252b5132 | 3339 | |
c25bc9fc L |
3340 | /* Allocate .plt and .got entries, and space for local symbols. */ |
3341 | htab_traverse (htab->loc_hash_table, | |
3342 | elf_i386_allocate_local_dynrelocs, | |
3343 | info); | |
3344 | ||
67a4f2b7 AO |
3345 | /* For every jump slot reserved in the sgotplt, reloc_count is |
3346 | incremented. However, when we reserve space for TLS descriptors, | |
3347 | it's not incremented, so in order to compute the space reserved | |
3348 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 | 3349 | slot size. |
caa0075c | 3350 | |
e1f98742 L |
3351 | PR ld/13302: We start next_irelative_index at the end of .rela.plt |
3352 | so that R_386_IRELATIVE entries come last. */ | |
6de2ae4a | 3353 | if (htab->elf.srelplt) |
e1f98742 L |
3354 | { |
3355 | htab->next_tls_desc_index = htab->elf.srelplt->reloc_count; | |
3356 | htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4; | |
3357 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
3358 | } | |
3359 | else if (htab->elf.irelplt) | |
3360 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
3361 | ||
67a4f2b7 | 3362 | |
a7b16ceb L |
3363 | if (htab->elf.sgotplt) |
3364 | { | |
3365 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
9a2a56cc | 3366 | entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
3367 | if ((htab->elf.hgot == NULL |
3368 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
3369 | && (htab->elf.sgotplt->size |
3370 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
3371 | && (htab->elf.splt == NULL |
3372 | || htab->elf.splt->size == 0) | |
3373 | && (htab->elf.sgot == NULL | |
3374 | || htab->elf.sgot->size == 0) | |
3375 | && (htab->elf.iplt == NULL | |
3376 | || htab->elf.iplt->size == 0) | |
3377 | && (htab->elf.igotplt == NULL | |
3378 | || htab->elf.igotplt->size == 0)) | |
3379 | htab->elf.sgotplt->size = 0; | |
3380 | } | |
3381 | ||
9a2a56cc AM |
3382 | |
3383 | if (htab->plt_eh_frame != NULL | |
3384 | && htab->elf.splt != NULL | |
3385 | && htab->elf.splt->size != 0 | |
3386 | && !bfd_is_abs_section (htab->elf.splt->output_section) | |
3387 | && _bfd_elf_eh_frame_present (info)) | |
3388 | htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt); | |
3389 | ||
5a15f56f AM |
3390 | /* We now have determined the sizes of the various dynamic sections. |
3391 | Allocate memory for them. */ | |
b34976b6 | 3392 | relocs = FALSE; |
252b5132 RH |
3393 | for (s = dynobj->sections; s != NULL; s = s->next) |
3394 | { | |
eac338cf PB |
3395 | bfd_boolean strip_section = TRUE; |
3396 | ||
252b5132 RH |
3397 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
3398 | continue; | |
3399 | ||
6de2ae4a | 3400 | if (s == htab->elf.splt |
9a2a56cc | 3401 | || s == htab->elf.sgot) |
252b5132 | 3402 | { |
6725bdbf AM |
3403 | /* Strip this section if we don't need it; see the |
3404 | comment below. */ | |
eac338cf PB |
3405 | /* We'd like to strip these sections if they aren't needed, but if |
3406 | we've exported dynamic symbols from them we must leave them. | |
3407 | It's too late to tell BFD to get rid of the symbols. */ | |
3408 | ||
7325306f | 3409 | if (htab->elf.hplt != NULL) |
eac338cf | 3410 | strip_section = FALSE; |
252b5132 | 3411 | } |
9a2a56cc AM |
3412 | else if (s == htab->elf.sgotplt |
3413 | || s == htab->elf.iplt | |
3414 | || s == htab->elf.igotplt | |
dd7e64d4 | 3415 | || s == htab->plt_got |
9a2a56cc | 3416 | || s == htab->plt_eh_frame |
5474d94f AM |
3417 | || s == htab->elf.sdynbss |
3418 | || s == htab->elf.sdynrelro) | |
9a2a56cc AM |
3419 | { |
3420 | /* Strip these too. */ | |
3421 | } | |
0112cd26 | 3422 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel")) |
252b5132 | 3423 | { |
6de2ae4a L |
3424 | if (s->size != 0 |
3425 | && s != htab->elf.srelplt | |
3426 | && s != htab->srelplt2) | |
b34976b6 | 3427 | relocs = TRUE; |
252b5132 | 3428 | |
0ac8d2ca AM |
3429 | /* We use the reloc_count field as a counter if we need |
3430 | to copy relocs into the output file. */ | |
5ae0bfb6 | 3431 | s->reloc_count = 0; |
252b5132 | 3432 | } |
6725bdbf | 3433 | else |
252b5132 RH |
3434 | { |
3435 | /* It's not one of our sections, so don't allocate space. */ | |
3436 | continue; | |
3437 | } | |
3438 | ||
c456f082 | 3439 | if (s->size == 0) |
252b5132 | 3440 | { |
0ac8d2ca AM |
3441 | /* If we don't need this section, strip it from the |
3442 | output file. This is mostly to handle .rel.bss and | |
3443 | .rel.plt. We must create both sections in | |
3444 | create_dynamic_sections, because they must be created | |
3445 | before the linker maps input sections to output | |
3446 | sections. The linker does that before | |
3447 | adjust_dynamic_symbol is called, and it is that | |
3448 | function which decides whether anything needs to go | |
3449 | into these sections. */ | |
c456f082 AM |
3450 | if (strip_section) |
3451 | s->flags |= SEC_EXCLUDE; | |
252b5132 RH |
3452 | continue; |
3453 | } | |
3454 | ||
c456f082 AM |
3455 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3456 | continue; | |
3457 | ||
f69da49f AM |
3458 | /* Allocate memory for the section contents. We use bfd_zalloc |
3459 | here in case unused entries are not reclaimed before the | |
3460 | section's contents are written out. This should not happen, | |
3461 | but this way if it does, we get a R_386_NONE reloc instead | |
3462 | of garbage. */ | |
a50b1753 | 3463 | s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size); |
6725bdbf | 3464 | if (s->contents == NULL) |
b34976b6 | 3465 | return FALSE; |
252b5132 RH |
3466 | } |
3467 | ||
e41b3a13 | 3468 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3469 | && htab->plt_eh_frame->contents != NULL) |
3470 | { | |
3471 | memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt, | |
3472 | sizeof (elf_i386_eh_frame_plt)); | |
3473 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
3474 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
3475 | } | |
e41b3a13 | 3476 | |
ebe50bae | 3477 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
3478 | { |
3479 | /* Add some entries to the .dynamic section. We fill in the | |
3480 | values later, in elf_i386_finish_dynamic_sections, but we | |
3481 | must add the entries now so that we get the correct size for | |
3482 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
3483 | dynamic linker and used by the debugger. */ | |
dc810e39 | 3484 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3485 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3486 | |
0e1862bb | 3487 | if (bfd_link_executable (info)) |
252b5132 | 3488 | { |
dc810e39 | 3489 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3490 | return FALSE; |
252b5132 RH |
3491 | } |
3492 | ||
6de2ae4a | 3493 | if (htab->elf.splt->size != 0) |
252b5132 | 3494 | { |
7c1e8d3e L |
3495 | /* DT_PLTGOT is used by prelink even if there is no PLT |
3496 | relocation. */ | |
3497 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
b34976b6 | 3498 | return FALSE; |
7c1e8d3e L |
3499 | |
3500 | if (htab->elf.srelplt->size != 0) | |
3501 | { | |
3502 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
3503 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
3504 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
3505 | return FALSE; | |
3506 | } | |
252b5132 RH |
3507 | } |
3508 | ||
3509 | if (relocs) | |
3510 | { | |
dc810e39 AM |
3511 | if (!add_dynamic_entry (DT_REL, 0) |
3512 | || !add_dynamic_entry (DT_RELSZ, 0) | |
3513 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
b34976b6 | 3514 | return FALSE; |
252b5132 | 3515 | |
0c715baa AM |
3516 | /* If any dynamic relocs apply to a read-only section, |
3517 | then we need a DT_TEXTREL entry. */ | |
248866a8 | 3518 | if ((info->flags & DF_TEXTREL) == 0) |
eb4ff4d6 L |
3519 | elf_link_hash_traverse (&htab->elf, |
3520 | elf_i386_readonly_dynrelocs, info); | |
0c715baa AM |
3521 | |
3522 | if ((info->flags & DF_TEXTREL) != 0) | |
3523 | { | |
2df3368d | 3524 | if (htab->readonly_dynrelocs_against_ifunc) |
8efa2874 L |
3525 | { |
3526 | info->callbacks->einfo | |
3527 | (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n")); | |
3528 | bfd_set_error (bfd_error_bad_value); | |
3529 | return FALSE; | |
3530 | } | |
3531 | ||
0c715baa | 3532 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 3533 | return FALSE; |
0c715baa | 3534 | } |
252b5132 | 3535 | } |
23209a78 | 3536 | if (get_elf_i386_backend_data (output_bfd)->is_vxworks |
7a2b07ff NS |
3537 | && !elf_vxworks_add_dynamic_entries (output_bfd, info)) |
3538 | return FALSE; | |
252b5132 | 3539 | } |
dc810e39 | 3540 | #undef add_dynamic_entry |
252b5132 | 3541 | |
b34976b6 | 3542 | return TRUE; |
252b5132 RH |
3543 | } |
3544 | ||
67a4f2b7 AO |
3545 | static bfd_boolean |
3546 | elf_i386_always_size_sections (bfd *output_bfd, | |
3547 | struct bfd_link_info *info) | |
3548 | { | |
3549 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3550 | ||
3551 | if (tls_sec) | |
3552 | { | |
3553 | struct elf_link_hash_entry *tlsbase; | |
3554 | ||
3555 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3556 | "_TLS_MODULE_BASE_", | |
3557 | FALSE, FALSE, FALSE); | |
3558 | ||
3559 | if (tlsbase && tlsbase->type == STT_TLS) | |
3560 | { | |
4dfe6ac6 | 3561 | struct elf_i386_link_hash_table *htab; |
67a4f2b7 AO |
3562 | struct bfd_link_hash_entry *bh = NULL; |
3563 | const struct elf_backend_data *bed | |
3564 | = get_elf_backend_data (output_bfd); | |
3565 | ||
4dfe6ac6 NC |
3566 | htab = elf_i386_hash_table (info); |
3567 | if (htab == NULL) | |
3568 | return FALSE; | |
3569 | ||
67a4f2b7 AO |
3570 | if (!(_bfd_generic_link_add_one_symbol |
3571 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3572 | tls_sec, 0, NULL, FALSE, | |
3573 | bed->collect, &bh))) | |
3574 | return FALSE; | |
9f03412a | 3575 | |
4dfe6ac6 | 3576 | htab->tls_module_base = bh; |
9f03412a | 3577 | |
67a4f2b7 AO |
3578 | tlsbase = (struct elf_link_hash_entry *)bh; |
3579 | tlsbase->def_regular = 1; | |
3580 | tlsbase->other = STV_HIDDEN; | |
576fa883 | 3581 | tlsbase->root.linker_def = 1; |
67a4f2b7 AO |
3582 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
3583 | } | |
3584 | } | |
3585 | ||
3586 | return TRUE; | |
3587 | } | |
3588 | ||
38701953 AM |
3589 | /* Set the correct type for an x86 ELF section. We do this by the |
3590 | section name, which is a hack, but ought to work. */ | |
3591 | ||
b34976b6 | 3592 | static bfd_boolean |
55fd94b0 AM |
3593 | elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
3594 | Elf_Internal_Shdr *hdr, | |
3595 | asection *sec) | |
38701953 | 3596 | { |
91d6fa6a | 3597 | const char *name; |
38701953 AM |
3598 | |
3599 | name = bfd_get_section_name (abfd, sec); | |
3600 | ||
3601 | /* This is an ugly, but unfortunately necessary hack that is | |
3602 | needed when producing EFI binaries on x86. It tells | |
3603 | elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
3604 | containing ELF relocation info. We need this hack in order to | |
3605 | be able to generate ELF binaries that can be translated into | |
3606 | EFI applications (which are essentially COFF objects). Those | |
3607 | files contain a COFF ".reloc" section inside an ELFNN object, | |
3608 | which would normally cause BFD to segfault because it would | |
3609 | attempt to interpret this section as containing relocation | |
3610 | entries for section "oc". With this hack enabled, ".reloc" | |
3611 | will be treated as a normal data section, which will avoid the | |
3612 | segfault. However, you won't be able to create an ELFNN binary | |
3613 | with a section named "oc" that needs relocations, but that's | |
3614 | the kind of ugly side-effects you get when detecting section | |
3615 | types based on their names... In practice, this limitation is | |
3616 | unlikely to bite. */ | |
3617 | if (strcmp (name, ".reloc") == 0) | |
3618 | hdr->sh_type = SHT_PROGBITS; | |
3619 | ||
b34976b6 | 3620 | return TRUE; |
38701953 AM |
3621 | } |
3622 | ||
9f03412a AO |
3623 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
3624 | executables. Rather than setting it to the beginning of the TLS | |
3625 | section, we have to set it to the end. This function may be called | |
3626 | multiple times, it is idempotent. */ | |
3627 | ||
3628 | static void | |
eb4ff4d6 | 3629 | elf_i386_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 3630 | { |
4dfe6ac6 | 3631 | struct elf_i386_link_hash_table *htab; |
9f03412a AO |
3632 | struct bfd_link_hash_entry *base; |
3633 | ||
0e1862bb | 3634 | if (!bfd_link_executable (info)) |
9f03412a AO |
3635 | return; |
3636 | ||
4dfe6ac6 NC |
3637 | htab = elf_i386_hash_table (info); |
3638 | if (htab == NULL) | |
3639 | return; | |
9f03412a | 3640 | |
4dfe6ac6 NC |
3641 | base = htab->tls_module_base; |
3642 | if (base == NULL) | |
9f03412a AO |
3643 | return; |
3644 | ||
4dfe6ac6 | 3645 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
3646 | } |
3647 | ||
13ae64f3 JJ |
3648 | /* Return the base VMA address which should be subtracted from real addresses |
3649 | when resolving @dtpoff relocation. | |
3650 | This is PT_TLS segment p_vaddr. */ | |
3651 | ||
3652 | static bfd_vma | |
eb4ff4d6 | 3653 | elf_i386_dtpoff_base (struct bfd_link_info *info) |
13ae64f3 | 3654 | { |
e1918d23 AM |
3655 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3656 | if (elf_hash_table (info)->tls_sec == NULL) | |
6a30718d | 3657 | return 0; |
e1918d23 | 3658 | return elf_hash_table (info)->tls_sec->vma; |
13ae64f3 JJ |
3659 | } |
3660 | ||
3661 | /* Return the relocation value for @tpoff relocation | |
3662 | if STT_TLS virtual address is ADDRESS. */ | |
3663 | ||
3664 | static bfd_vma | |
eb4ff4d6 | 3665 | elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address) |
13ae64f3 | 3666 | { |
e1918d23 | 3667 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3668 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3669 | bfd_vma static_tls_size; | |
13ae64f3 | 3670 | |
e1918d23 AM |
3671 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3672 | if (htab->tls_sec == NULL) | |
6a30718d | 3673 | return 0; |
7dc98aea RO |
3674 | |
3675 | /* Consider special static TLS alignment requirements. */ | |
3676 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3677 | return static_tls_size + htab->tls_sec->vma - address; | |
13ae64f3 JJ |
3678 | } |
3679 | ||
252b5132 RH |
3680 | /* Relocate an i386 ELF section. */ |
3681 | ||
b34976b6 | 3682 | static bfd_boolean |
55fd94b0 AM |
3683 | elf_i386_relocate_section (bfd *output_bfd, |
3684 | struct bfd_link_info *info, | |
3685 | bfd *input_bfd, | |
3686 | asection *input_section, | |
3687 | bfd_byte *contents, | |
3688 | Elf_Internal_Rela *relocs, | |
3689 | Elf_Internal_Sym *local_syms, | |
3690 | asection **local_sections) | |
252b5132 | 3691 | { |
6725bdbf | 3692 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
3693 | Elf_Internal_Shdr *symtab_hdr; |
3694 | struct elf_link_hash_entry **sym_hashes; | |
3695 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3696 | bfd_vma *local_tlsdesc_gotents; |
252b5132 | 3697 | Elf_Internal_Rela *rel; |
60f2e42e | 3698 | Elf_Internal_Rela *wrel; |
252b5132 | 3699 | Elf_Internal_Rela *relend; |
3348747a | 3700 | bfd_boolean is_vxworks_tls; |
25e762b9 | 3701 | unsigned plt_entry_size; |
252b5132 | 3702 | |
0ffa91dd | 3703 | BFD_ASSERT (is_i386_elf (input_bfd)); |
6bbec505 | 3704 | |
c337a162 L |
3705 | /* Skip if check_relocs failed. */ |
3706 | if (input_section->check_relocs_failed) | |
3707 | return FALSE; | |
3708 | ||
6725bdbf | 3709 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
3710 | if (htab == NULL) |
3711 | return FALSE; | |
0ffa91dd | 3712 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
252b5132 RH |
3713 | sym_hashes = elf_sym_hashes (input_bfd); |
3714 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
67a4f2b7 | 3715 | local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd); |
3348747a NS |
3716 | /* We have to handle relocations in vxworks .tls_vars sections |
3717 | specially, because the dynamic loader is 'weird'. */ | |
23209a78 | 3718 | is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks |
0e1862bb | 3719 | && bfd_link_pic (info) |
3348747a NS |
3720 | && !strcmp (input_section->output_section->name, |
3721 | ".tls_vars")); | |
252b5132 | 3722 | |
eb4ff4d6 | 3723 | elf_i386_set_tls_module_base (info); |
9f03412a | 3724 | |
25e762b9 RM |
3725 | plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd); |
3726 | ||
60f2e42e | 3727 | rel = wrel = relocs; |
252b5132 | 3728 | relend = relocs + input_section->reloc_count; |
60f2e42e | 3729 | for (; rel < relend; wrel++, rel++) |
252b5132 | 3730 | { |
13ae64f3 | 3731 | unsigned int r_type; |
252b5132 RH |
3732 | reloc_howto_type *howto; |
3733 | unsigned long r_symndx; | |
3734 | struct elf_link_hash_entry *h; | |
dd7e64d4 | 3735 | struct elf_i386_link_hash_entry *eh; |
252b5132 RH |
3736 | Elf_Internal_Sym *sym; |
3737 | asection *sec; | |
dd7e64d4 | 3738 | bfd_vma off, offplt, plt_offset; |
252b5132 | 3739 | bfd_vma relocation; |
b34976b6 | 3740 | bfd_boolean unresolved_reloc; |
252b5132 | 3741 | bfd_reloc_status_type r; |
1b452ec6 | 3742 | unsigned int indx; |
13ae64f3 | 3743 | int tls_type; |
1788fc08 | 3744 | bfd_vma st_size; |
dd7e64d4 | 3745 | asection *resolved_plt; |
aec6b87e | 3746 | bfd_boolean resolved_to_zero; |
252b5132 RH |
3747 | |
3748 | r_type = ELF32_R_TYPE (rel->r_info); | |
55fd94b0 AM |
3749 | if (r_type == R_386_GNU_VTINHERIT |
3750 | || r_type == R_386_GNU_VTENTRY) | |
18954b29 L |
3751 | { |
3752 | if (wrel != rel) | |
3753 | *wrel = *rel; | |
3754 | continue; | |
3755 | } | |
dc47f327 | 3756 | |
55fd94b0 | 3757 | if ((indx = r_type) >= R_386_standard |
13ae64f3 JJ |
3758 | && ((indx = r_type - R_386_ext_offset) - R_386_standard |
3759 | >= R_386_ext - R_386_standard) | |
3760 | && ((indx = r_type - R_386_tls_offset) - R_386_ext | |
c74be520 | 3761 | >= R_386_ext2 - R_386_ext)) |
252b5132 | 3762 | { |
4eca0228 | 3763 | _bfd_error_handler |
695344c0 | 3764 | /* xgettext:c-format */ |
d003868e AM |
3765 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), |
3766 | input_bfd, input_section, r_type); | |
252b5132 | 3767 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 3768 | return FALSE; |
252b5132 | 3769 | } |
1b452ec6 | 3770 | howto = elf_howto_table + indx; |
252b5132 RH |
3771 | |
3772 | r_symndx = ELF32_R_SYM (rel->r_info); | |
252b5132 RH |
3773 | h = NULL; |
3774 | sym = NULL; | |
3775 | sec = NULL; | |
b34976b6 | 3776 | unresolved_reloc = FALSE; |
252b5132 RH |
3777 | if (r_symndx < symtab_hdr->sh_info) |
3778 | { | |
3779 | sym = local_syms + r_symndx; | |
3780 | sec = local_sections[r_symndx]; | |
3781 | relocation = (sec->output_section->vma | |
3782 | + sec->output_offset | |
3783 | + sym->st_value); | |
1788fc08 | 3784 | st_size = sym->st_size; |
ab96bf03 AM |
3785 | |
3786 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
3787 | && ((sec->flags & SEC_MERGE) != 0 | |
0e1862bb | 3788 | || (bfd_link_relocatable (info) |
ab96bf03 | 3789 | && sec->output_offset != 0))) |
f8df10f4 | 3790 | { |
f8df10f4 | 3791 | bfd_vma addend; |
4a335f3d | 3792 | bfd_byte *where = contents + rel->r_offset; |
f8df10f4 | 3793 | |
4a335f3d | 3794 | switch (howto->size) |
f8df10f4 | 3795 | { |
4a335f3d AM |
3796 | case 0: |
3797 | addend = bfd_get_8 (input_bfd, where); | |
3798 | if (howto->pc_relative) | |
3799 | { | |
3800 | addend = (addend ^ 0x80) - 0x80; | |
3801 | addend += 1; | |
3802 | } | |
3803 | break; | |
3804 | case 1: | |
3805 | addend = bfd_get_16 (input_bfd, where); | |
3806 | if (howto->pc_relative) | |
3807 | { | |
3808 | addend = (addend ^ 0x8000) - 0x8000; | |
3809 | addend += 2; | |
3810 | } | |
3811 | break; | |
3812 | case 2: | |
3813 | addend = bfd_get_32 (input_bfd, where); | |
3814 | if (howto->pc_relative) | |
3815 | { | |
3816 | addend = (addend ^ 0x80000000) - 0x80000000; | |
3817 | addend += 4; | |
3818 | } | |
3819 | break; | |
3820 | default: | |
3821 | abort (); | |
f8df10f4 JJ |
3822 | } |
3823 | ||
0e1862bb | 3824 | if (bfd_link_relocatable (info)) |
ab96bf03 AM |
3825 | addend += sec->output_offset; |
3826 | else | |
3827 | { | |
3828 | asection *msec = sec; | |
3829 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, | |
3830 | addend); | |
3831 | addend -= relocation; | |
3832 | addend += msec->output_section->vma + msec->output_offset; | |
3833 | } | |
4a335f3d AM |
3834 | |
3835 | switch (howto->size) | |
3836 | { | |
3837 | case 0: | |
16a10388 | 3838 | /* FIXME: overflow checks. */ |
4a335f3d AM |
3839 | if (howto->pc_relative) |
3840 | addend -= 1; | |
3841 | bfd_put_8 (input_bfd, addend, where); | |
4a335f3d AM |
3842 | break; |
3843 | case 1: | |
3844 | if (howto->pc_relative) | |
3845 | addend -= 2; | |
3846 | bfd_put_16 (input_bfd, addend, where); | |
4a335f3d AM |
3847 | break; |
3848 | case 2: | |
3849 | if (howto->pc_relative) | |
3850 | addend -= 4; | |
3851 | bfd_put_32 (input_bfd, addend, where); | |
3852 | break; | |
3853 | } | |
f8df10f4 | 3854 | } |
0e1862bb | 3855 | else if (!bfd_link_relocatable (info) |
1f85278f | 3856 | && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc L |
3857 | { |
3858 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
9fff0c39 L |
3859 | h = elf_i386_get_local_sym_hash (htab, input_bfd, rel, |
3860 | FALSE); | |
c25bc9fc L |
3861 | if (h == NULL) |
3862 | abort (); | |
3863 | ||
23209a78 | 3864 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
3865 | h->root.u.def.value = sym->st_value; |
3866 | h->root.u.def.section = sec; | |
3867 | } | |
252b5132 RH |
3868 | } |
3869 | else | |
3870 | { | |
3d540e93 | 3871 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 3872 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
ffb2e45b | 3873 | |
b2a8e766 AM |
3874 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3875 | r_symndx, symtab_hdr, sym_hashes, | |
3876 | h, sec, relocation, | |
62d887d4 | 3877 | unresolved_reloc, warned, ignored); |
1788fc08 | 3878 | st_size = h->size; |
252b5132 RH |
3879 | } |
3880 | ||
dbaa2011 | 3881 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
3882 | { |
3883 | _bfd_clear_contents (howto, input_bfd, input_section, | |
3884 | contents + rel->r_offset); | |
3885 | wrel->r_offset = rel->r_offset; | |
3886 | wrel->r_info = 0; | |
3887 | wrel->r_addend = 0; | |
3888 | ||
3889 | /* For ld -r, remove relocations in debug sections against | |
3890 | sections defined in discarded sections. Not done for | |
3891 | eh_frame editing code expects to be present. */ | |
3892 | if (bfd_link_relocatable (info) | |
3893 | && (input_section->flags & SEC_DEBUGGING)) | |
3894 | wrel--; | |
3895 | ||
3896 | continue; | |
3897 | } | |
9635fe29 | 3898 | |
0e1862bb | 3899 | if (bfd_link_relocatable (info)) |
2d5da473 L |
3900 | { |
3901 | if (wrel != rel) | |
3902 | *wrel = *rel; | |
3903 | continue; | |
3904 | } | |
ab96bf03 | 3905 | |
cbe950e9 L |
3906 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3907 | it here if it is defined in a non-shared object. */ | |
3908 | if (h != NULL | |
3909 | && h->type == STT_GNU_IFUNC | |
3910 | && h->def_regular) | |
3911 | { | |
3912 | asection *plt, *gotplt, *base_got; | |
3913 | bfd_vma plt_index; | |
4c544807 | 3914 | const char *name; |
cbe950e9 | 3915 | |
97dc35c8 L |
3916 | if ((input_section->flags & SEC_ALLOC) == 0) |
3917 | { | |
3918 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
3919 | sections because such sections are not SEC_ALLOC and | |
3920 | thus ld.so will not process them. */ | |
3921 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 3922 | continue; |
97dc35c8 L |
3923 | abort (); |
3924 | } | |
cbe950e9 L |
3925 | |
3926 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 3927 | if (htab->elf.splt != NULL) |
cbe950e9 | 3928 | { |
6de2ae4a L |
3929 | plt = htab->elf.splt; |
3930 | gotplt = htab->elf.sgotplt; | |
cbe950e9 L |
3931 | } |
3932 | else | |
3933 | { | |
6de2ae4a L |
3934 | plt = htab->elf.iplt; |
3935 | gotplt = htab->elf.igotplt; | |
cbe950e9 L |
3936 | } |
3937 | ||
cbe950e9 L |
3938 | switch (r_type) |
3939 | { | |
3940 | default: | |
233cc9c1 | 3941 | break; |
cbe950e9 L |
3942 | |
3943 | case R_386_GOT32: | |
02a86693 | 3944 | case R_386_GOT32X: |
6de2ae4a | 3945 | base_got = htab->elf.sgot; |
cbe950e9 L |
3946 | off = h->got.offset; |
3947 | ||
7afd84dc | 3948 | if (base_got == NULL) |
cbe950e9 L |
3949 | abort (); |
3950 | ||
7afd84dc | 3951 | if (off == (bfd_vma) -1) |
cbe950e9 | 3952 | { |
7afd84dc L |
3953 | /* We can't use h->got.offset here to save state, or |
3954 | even just remember the offset, as finish_dynamic_symbol | |
3955 | would use that as offset into .got. */ | |
6bbec505 | 3956 | |
233cc9c1 L |
3957 | if (h->plt.offset == (bfd_vma) -1) |
3958 | abort (); | |
3959 | ||
6de2ae4a | 3960 | if (htab->elf.splt != NULL) |
7afd84dc | 3961 | { |
25e762b9 | 3962 | plt_index = h->plt.offset / plt_entry_size - 1; |
7afd84dc | 3963 | off = (plt_index + 3) * 4; |
6de2ae4a | 3964 | base_got = htab->elf.sgotplt; |
7afd84dc | 3965 | } |
cbe950e9 L |
3966 | else |
3967 | { | |
25e762b9 | 3968 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 3969 | off = plt_index * 4; |
6de2ae4a | 3970 | base_got = htab->elf.igotplt; |
7afd84dc L |
3971 | } |
3972 | ||
3973 | if (h->dynindx == -1 | |
3974 | || h->forced_local | |
3975 | || info->symbolic) | |
3976 | { | |
3977 | /* This references the local defitionion. We must | |
3978 | initialize this entry in the global offset table. | |
3979 | Since the offset must always be a multiple of 8, | |
3980 | we use the least significant bit to record | |
3981 | whether we have initialized it already. | |
3982 | ||
3983 | When doing a dynamic link, we create a .rela.got | |
3984 | relocation entry to initialize the value. This | |
3985 | is done in the finish_dynamic_symbol routine. */ | |
3986 | if ((off & 1) != 0) | |
3987 | off &= ~1; | |
3988 | else | |
3989 | { | |
3990 | bfd_put_32 (output_bfd, relocation, | |
3991 | base_got->contents + off); | |
3992 | h->got.offset |= 1; | |
3993 | } | |
cbe950e9 | 3994 | } |
cbe950e9 | 3995 | |
7afd84dc | 3996 | relocation = off; |
7afd84dc L |
3997 | } |
3998 | else | |
ca8c86ef L |
3999 | relocation = (base_got->output_section->vma |
4000 | + base_got->output_offset + off | |
4001 | - gotplt->output_section->vma | |
4002 | - gotplt->output_offset); | |
4003 | ||
712ec279 L |
4004 | if ((*(contents + rel->r_offset - 1) & 0xc7) == 0x5) |
4005 | { | |
4006 | if (bfd_link_pic (info)) | |
4007 | goto disallow_got32; | |
4008 | ||
4009 | /* Add the GOT base if there is no base register. */ | |
4010 | relocation += (gotplt->output_section->vma | |
4011 | + gotplt->output_offset); | |
4012 | } | |
4013 | else if (htab->elf.splt == NULL) | |
4014 | { | |
4015 | /* Adjust for static executables. */ | |
4016 | relocation += gotplt->output_offset; | |
4017 | } | |
0018b0a3 | 4018 | |
cbe950e9 | 4019 | goto do_relocation; |
233cc9c1 L |
4020 | } |
4021 | ||
4022 | if (h->plt.offset == (bfd_vma) -1) | |
4023 | { | |
4024 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
4025 | if (r_type == R_386_32 | |
4026 | && (input_section->flags & SEC_CODE) == 0) | |
4027 | goto do_ifunc_pointer; | |
4028 | goto bad_ifunc_reloc; | |
4029 | } | |
4030 | ||
4031 | relocation = (plt->output_section->vma | |
4032 | + plt->output_offset + h->plt.offset); | |
4033 | ||
4034 | switch (r_type) | |
4035 | { | |
4036 | default: | |
4037 | bad_ifunc_reloc: | |
4038 | if (h->root.root.string) | |
4039 | name = h->root.root.string; | |
4040 | else | |
4041 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
4042 | NULL); | |
4eca0228 | 4043 | _bfd_error_handler |
695344c0 | 4044 | /* xgettext:c-format */ |
233cc9c1 L |
4045 | (_("%B: relocation %s against STT_GNU_IFUNC " |
4046 | "symbol `%s' isn't supported"), input_bfd, | |
4047 | howto->name, name); | |
4048 | bfd_set_error (bfd_error_bad_value); | |
4049 | return FALSE; | |
4050 | ||
4051 | case R_386_32: | |
4052 | /* Generate dynamic relcoation only when there is a | |
4053 | non-GOT reference in a shared object. */ | |
4054 | if ((bfd_link_pic (info) && h->non_got_ref) | |
4055 | || h->plt.offset == (bfd_vma) -1) | |
4056 | { | |
4057 | Elf_Internal_Rela outrel; | |
4058 | asection *sreloc; | |
4059 | bfd_vma offset; | |
4060 | ||
4061 | do_ifunc_pointer: | |
4062 | /* Need a dynamic relocation to get the real function | |
4063 | adddress. */ | |
4064 | offset = _bfd_elf_section_offset (output_bfd, | |
4065 | info, | |
4066 | input_section, | |
4067 | rel->r_offset); | |
4068 | if (offset == (bfd_vma) -1 | |
4069 | || offset == (bfd_vma) -2) | |
4070 | abort (); | |
4071 | ||
4072 | outrel.r_offset = (input_section->output_section->vma | |
4073 | + input_section->output_offset | |
4074 | + offset); | |
4075 | ||
4076 | if (h->dynindx == -1 | |
4077 | || h->forced_local | |
4078 | || bfd_link_executable (info)) | |
4079 | { | |
4080 | /* This symbol is resolved locally. */ | |
4081 | outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
4082 | bfd_put_32 (output_bfd, | |
4083 | (h->root.u.def.value | |
4084 | + h->root.u.def.section->output_section->vma | |
4085 | + h->root.u.def.section->output_offset), | |
4086 | contents + offset); | |
4087 | } | |
4088 | else | |
4089 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
4090 | ||
4091 | /* Dynamic relocations are stored in | |
4092 | 1. .rel.ifunc section in PIC object. | |
4093 | 2. .rel.got section in dynamic executable. | |
4094 | 3. .rel.iplt section in static executable. */ | |
4095 | if (bfd_link_pic (info)) | |
4096 | sreloc = htab->elf.irelifunc; | |
4097 | else if (htab->elf.splt != NULL) | |
4098 | sreloc = htab->elf.srelgot; | |
4099 | else | |
4100 | sreloc = htab->elf.irelplt; | |
4101 | elf_append_rel (output_bfd, sreloc, &outrel); | |
4102 | ||
4103 | /* If this reloc is against an external symbol, we | |
4104 | do not want to fiddle with the addend. Otherwise, | |
4105 | we need to include the symbol value so that it | |
4106 | becomes an addend for the dynamic reloc. For an | |
4107 | internal symbol, we have updated addend. */ | |
4108 | continue; | |
4109 | } | |
4110 | /* FALLTHROUGH */ | |
4111 | case R_386_PC32: | |
4112 | case R_386_PLT32: | |
4113 | goto do_relocation; | |
cbe950e9 L |
4114 | |
4115 | case R_386_GOTOFF: | |
4116 | relocation -= (gotplt->output_section->vma | |
4117 | + gotplt->output_offset); | |
4118 | goto do_relocation; | |
4119 | } | |
4120 | } | |
4121 | ||
04ebc307 | 4122 | eh = (struct elf_i386_link_hash_entry *) h; |
aec6b87e | 4123 | resolved_to_zero = (eh != NULL |
e62b9723 L |
4124 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
4125 | eh->has_got_reloc, | |
4126 | eh)); | |
aec6b87e | 4127 | |
252b5132 RH |
4128 | switch (r_type) |
4129 | { | |
02a86693 L |
4130 | case R_386_GOT32X: |
4131 | /* Avoid optimizing _DYNAMIC since ld.so may use its | |
4132 | link-time address. */ | |
4133 | if (h == htab->elf.hdynamic) | |
4134 | goto r_386_got32; | |
4135 | ||
4136 | if (bfd_link_pic (info)) | |
4137 | { | |
4138 | /* It is OK to convert mov to lea and convert indirect | |
4139 | branch to direct branch. It is OK to convert adc, | |
4140 | add, and, cmp, or, sbb, sub, test, xor only when PIC | |
4141 | is false. */ | |
02e2aef8 L |
4142 | unsigned int opcode, addend; |
4143 | addend = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
4144 | if (addend != 0) | |
4145 | goto r_386_got32; | |
4146 | opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
02a86693 L |
4147 | if (opcode != 0x8b && opcode != 0xff) |
4148 | goto r_386_got32; | |
4149 | } | |
4150 | ||
4151 | /* Resolve "mov GOT[(%reg)], %reg", | |
4152 | "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]" | |
4153 | and "binop foo@GOT[(%reg)], %reg". */ | |
4154 | if (h == NULL | |
4155 | || (h->plt.offset == (bfd_vma) -1 | |
4156 | && h->got.offset == (bfd_vma) -1) | |
4157 | || htab->elf.sgotplt == NULL) | |
4158 | abort (); | |
4159 | ||
4160 | offplt = (htab->elf.sgotplt->output_section->vma | |
4161 | + htab->elf.sgotplt->output_offset); | |
4162 | ||
4163 | /* It is relative to .got.plt section. */ | |
4164 | if (h->got.offset != (bfd_vma) -1) | |
32875eb1 L |
4165 | /* Use GOT entry. Mask off the least significant bit in |
4166 | GOT offset which may be set by R_386_GOT32 processing | |
4167 | below. */ | |
02a86693 L |
4168 | relocation = (htab->elf.sgot->output_section->vma |
4169 | + htab->elf.sgot->output_offset | |
32875eb1 | 4170 | + (h->got.offset & ~1) - offplt); |
02a86693 L |
4171 | else |
4172 | /* Use GOTPLT entry. */ | |
4173 | relocation = (h->plt.offset / plt_entry_size - 1 + 3) * 4; | |
4174 | ||
4175 | if (!bfd_link_pic (info)) | |
4176 | { | |
4177 | /* If not PIC, add the .got.plt section address for | |
a3718e9e | 4178 | baseless addressing. */ |
02a86693 | 4179 | unsigned int modrm; |
02e2aef8 | 4180 | modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
02a86693 L |
4181 | if ((modrm & 0xc7) == 0x5) |
4182 | relocation += offplt; | |
4183 | } | |
4184 | ||
4185 | unresolved_reloc = FALSE; | |
4186 | break; | |
4187 | ||
252b5132 | 4188 | case R_386_GOT32: |
02a86693 | 4189 | r_386_got32: |
252b5132 RH |
4190 | /* Relocation is to the entry for this symbol in the global |
4191 | offset table. */ | |
6de2ae4a | 4192 | if (htab->elf.sgot == NULL) |
ffb2e45b | 4193 | abort (); |
252b5132 RH |
4194 | |
4195 | if (h != NULL) | |
4196 | { | |
b34976b6 | 4197 | bfd_boolean dyn; |
252b5132 RH |
4198 | |
4199 | off = h->got.offset; | |
ebe50bae | 4200 | dyn = htab->elf.dynamic_sections_created; |
0e1862bb L |
4201 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
4202 | bfd_link_pic (info), | |
4203 | h) | |
4204 | || (bfd_link_pic (info) | |
586119b3 | 4205 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
ef5aade5 L |
4206 | || (ELF_ST_VISIBILITY (h->other) |
4207 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
4208 | { |
4209 | /* This is actually a static link, or it is a | |
4210 | -Bsymbolic link and the symbol is defined | |
4211 | locally, or the symbol was forced to be local | |
4212 | because of a version file. We must initialize | |
4213 | this entry in the global offset table. Since the | |
4214 | offset must always be a multiple of 4, we use the | |
4215 | least significant bit to record whether we have | |
4216 | initialized it already. | |
4217 | ||
4218 | When doing a dynamic link, we create a .rel.got | |
4219 | relocation entry to initialize the value. This | |
4220 | is done in the finish_dynamic_symbol routine. */ | |
4221 | if ((off & 1) != 0) | |
4222 | off &= ~1; | |
4223 | else | |
4224 | { | |
4225 | bfd_put_32 (output_bfd, relocation, | |
6de2ae4a | 4226 | htab->elf.sgot->contents + off); |
252b5132 RH |
4227 | h->got.offset |= 1; |
4228 | } | |
4229 | } | |
8c694914 | 4230 | else |
b34976b6 | 4231 | unresolved_reloc = FALSE; |
252b5132 RH |
4232 | } |
4233 | else | |
4234 | { | |
ffb2e45b AM |
4235 | if (local_got_offsets == NULL) |
4236 | abort (); | |
252b5132 RH |
4237 | |
4238 | off = local_got_offsets[r_symndx]; | |
4239 | ||
4240 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
4241 | the least significant bit to record whether we have |
4242 | already generated the necessary reloc. */ | |
252b5132 RH |
4243 | if ((off & 1) != 0) |
4244 | off &= ~1; | |
4245 | else | |
4246 | { | |
6725bdbf | 4247 | bfd_put_32 (output_bfd, relocation, |
6de2ae4a | 4248 | htab->elf.sgot->contents + off); |
252b5132 | 4249 | |
0e1862bb | 4250 | if (bfd_link_pic (info)) |
252b5132 | 4251 | { |
947216bf AM |
4252 | asection *s; |
4253 | Elf_Internal_Rela outrel; | |
252b5132 | 4254 | |
6de2ae4a | 4255 | s = htab->elf.srelgot; |
947216bf | 4256 | if (s == NULL) |
ffb2e45b | 4257 | abort (); |
252b5132 | 4258 | |
6de2ae4a L |
4259 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4260 | + htab->elf.sgot->output_offset | |
252b5132 RH |
4261 | + off); |
4262 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
59d6ffb2 | 4263 | elf_append_rel (output_bfd, s, &outrel); |
252b5132 RH |
4264 | } |
4265 | ||
4266 | local_got_offsets[r_symndx] |= 1; | |
4267 | } | |
252b5132 RH |
4268 | } |
4269 | ||
ffb2e45b AM |
4270 | if (off >= (bfd_vma) -2) |
4271 | abort (); | |
4272 | ||
74d7f0aa L |
4273 | relocation = (htab->elf.sgot->output_section->vma |
4274 | + htab->elf.sgot->output_offset + off); | |
4275 | if ((*(contents + rel->r_offset - 1) & 0xc7) == 0x5) | |
4276 | { | |
4277 | if (bfd_link_pic (info)) | |
4278 | { | |
4279 | /* For PIC, disallow R_386_GOT32 without a base | |
4280 | register since we don't know what the GOT base | |
4281 | is. */ | |
4282 | const char *name; | |
4283 | ||
712ec279 | 4284 | disallow_got32: |
74d7f0aa L |
4285 | if (h == NULL) |
4286 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
4287 | NULL); | |
4288 | else | |
4289 | name = h->root.root.string; | |
4290 | ||
4eca0228 | 4291 | _bfd_error_handler |
695344c0 | 4292 | /* xgettext:c-format */ |
712ec279 L |
4293 | (_("%B: direct GOT relocation %s against `%s' without base register can not be used when making a shared object"), |
4294 | input_bfd, howto->name, name); | |
74d7f0aa L |
4295 | bfd_set_error (bfd_error_bad_value); |
4296 | return FALSE; | |
4297 | } | |
4298 | } | |
4299 | else | |
4300 | { | |
4301 | /* Subtract the .got.plt section address only with a base | |
4302 | register. */ | |
4303 | relocation -= (htab->elf.sgotplt->output_section->vma | |
4304 | + htab->elf.sgotplt->output_offset); | |
4305 | } | |
4306 | ||
252b5132 RH |
4307 | break; |
4308 | ||
4309 | case R_386_GOTOFF: | |
4310 | /* Relocation is relative to the start of the global offset | |
4311 | table. */ | |
4312 | ||
3d949995 L |
4313 | /* Check to make sure it isn't a protected function or data |
4314 | symbol for shared library since it may not be local when | |
4315 | used as function address or with copy relocation. We also | |
e3c0e327 | 4316 | need to make sure that a symbol is referenced locally. */ |
0e1862bb | 4317 | if (!bfd_link_executable (info) && h) |
90f487df | 4318 | { |
41bed6dd L |
4319 | if (!h->def_regular) |
4320 | { | |
4321 | const char *v; | |
4322 | ||
4323 | switch (ELF_ST_VISIBILITY (h->other)) | |
4324 | { | |
4325 | case STV_HIDDEN: | |
4326 | v = _("hidden symbol"); | |
4327 | break; | |
4328 | case STV_INTERNAL: | |
4329 | v = _("internal symbol"); | |
4330 | break; | |
4331 | case STV_PROTECTED: | |
4332 | v = _("protected symbol"); | |
4333 | break; | |
4334 | default: | |
4335 | v = _("symbol"); | |
4336 | break; | |
4337 | } | |
4338 | ||
4eca0228 | 4339 | _bfd_error_handler |
695344c0 | 4340 | /* xgettext:c-format */ |
41bed6dd L |
4341 | (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"), |
4342 | input_bfd, v, h->root.root.string); | |
4343 | bfd_set_error (bfd_error_bad_value); | |
4344 | return FALSE; | |
4345 | } | |
d5597ebc | 4346 | else if (!SYMBOL_REFERENCES_LOCAL (info, h) |
3d949995 L |
4347 | && (h->type == STT_FUNC |
4348 | || h->type == STT_OBJECT) | |
41bed6dd L |
4349 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) |
4350 | { | |
4eca0228 | 4351 | _bfd_error_handler |
695344c0 | 4352 | /* xgettext:c-format */ |
3d949995 L |
4353 | (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"), |
4354 | input_bfd, | |
4355 | h->type == STT_FUNC ? "function" : "data", | |
4356 | h->root.root.string); | |
41bed6dd L |
4357 | bfd_set_error (bfd_error_bad_value); |
4358 | return FALSE; | |
4359 | } | |
90f487df L |
4360 | } |
4361 | ||
8c37241b JJ |
4362 | /* Note that sgot is not involved in this |
4363 | calculation. We always want the start of .got.plt. If we | |
4364 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
252b5132 RH |
4365 | permitted by the ABI, we might have to change this |
4366 | calculation. */ | |
6de2ae4a L |
4367 | relocation -= htab->elf.sgotplt->output_section->vma |
4368 | + htab->elf.sgotplt->output_offset; | |
252b5132 RH |
4369 | break; |
4370 | ||
4371 | case R_386_GOTPC: | |
4372 | /* Use global offset table as symbol value. */ | |
6de2ae4a L |
4373 | relocation = htab->elf.sgotplt->output_section->vma |
4374 | + htab->elf.sgotplt->output_offset; | |
b34976b6 | 4375 | unresolved_reloc = FALSE; |
252b5132 RH |
4376 | break; |
4377 | ||
4378 | case R_386_PLT32: | |
4379 | /* Relocation is to the entry for this symbol in the | |
4380 | procedure linkage table. */ | |
4381 | ||
dd5724d5 | 4382 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 4383 | without using the procedure linkage table. */ |
252b5132 RH |
4384 | if (h == NULL) |
4385 | break; | |
4386 | ||
dd7e64d4 L |
4387 | if ((h->plt.offset == (bfd_vma) -1 |
4388 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 4389 | || htab->elf.splt == NULL) |
252b5132 RH |
4390 | { |
4391 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
4392 | happens when statically linking PIC code, or when |
4393 | using -Bsymbolic. */ | |
252b5132 RH |
4394 | break; |
4395 | } | |
4396 | ||
dd7e64d4 L |
4397 | if (h->plt.offset != (bfd_vma) -1) |
4398 | { | |
4399 | resolved_plt = htab->elf.splt; | |
4400 | plt_offset = h->plt.offset; | |
4401 | } | |
4402 | else | |
4403 | { | |
4404 | resolved_plt = htab->plt_got; | |
4405 | plt_offset = eh->plt_got.offset; | |
4406 | } | |
4407 | ||
4408 | relocation = (resolved_plt->output_section->vma | |
4409 | + resolved_plt->output_offset | |
4410 | + plt_offset); | |
b34976b6 | 4411 | unresolved_reloc = FALSE; |
252b5132 RH |
4412 | break; |
4413 | ||
1788fc08 | 4414 | case R_386_SIZE32: |
1788fc08 L |
4415 | /* Set to symbol size. */ |
4416 | relocation = st_size; | |
4417 | /* Fall through. */ | |
4418 | ||
252b5132 RH |
4419 | case R_386_32: |
4420 | case R_386_PC32: | |
3348747a NS |
4421 | if ((input_section->flags & SEC_ALLOC) == 0 |
4422 | || is_vxworks_tls) | |
ec338859 AM |
4423 | break; |
4424 | ||
aec6b87e L |
4425 | /* Copy dynamic function pointer relocations. Don't generate |
4426 | dynamic relocations against resolved undefined weak symbols | |
4427 | in PIE, except for R_386_PC32. */ | |
0e1862bb | 4428 | if ((bfd_link_pic (info) |
ef5aade5 | 4429 | && (h == NULL |
aec6b87e L |
4430 | || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
4431 | && (!resolved_to_zero | |
4432 | || r_type == R_386_PC32)) | |
4433 | || h->root.type != bfd_link_hash_undefweak)) | |
1788fc08 | 4434 | && ((r_type != R_386_PC32 && r_type != R_386_SIZE32) |
f6c52c13 | 4435 | || !SYMBOL_CALLS_LOCAL (info, h))) |
a23b6845 | 4436 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 4437 | && !bfd_link_pic (info) |
12d0ee4a AM |
4438 | && h != NULL |
4439 | && h->dynindx != -1 | |
aec6b87e L |
4440 | && (!h->non_got_ref |
4441 | || eh->func_pointer_refcount > 0 | |
4442 | || (h->root.type == bfd_link_hash_undefweak | |
4443 | && !resolved_to_zero)) | |
bae420ef L |
4444 | && ((h->def_dynamic && !h->def_regular) |
4445 | /* Undefined weak symbol is bound locally when | |
4446 | PIC is false. */ | |
4447 | || h->root.type == bfd_link_hash_undefweak))) | |
252b5132 | 4448 | { |
947216bf | 4449 | Elf_Internal_Rela outrel; |
b34976b6 | 4450 | bfd_boolean skip, relocate; |
0c715baa | 4451 | asection *sreloc; |
252b5132 RH |
4452 | |
4453 | /* When generating a shared object, these relocations | |
4454 | are copied into the output file to be resolved at run | |
4455 | time. */ | |
4456 | ||
b34976b6 AM |
4457 | skip = FALSE; |
4458 | relocate = FALSE; | |
252b5132 | 4459 | |
c629eae0 JJ |
4460 | outrel.r_offset = |
4461 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
4462 | rel->r_offset); | |
4463 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 4464 | skip = TRUE; |
0bb2d96a | 4465 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 4466 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
4467 | outrel.r_offset += (input_section->output_section->vma |
4468 | + input_section->output_offset); | |
4469 | ||
4470 | if (skip) | |
0bb2d96a | 4471 | memset (&outrel, 0, sizeof outrel); |
5a15f56f AM |
4472 | else if (h != NULL |
4473 | && h->dynindx != -1 | |
4474 | && (r_type == R_386_PC32 | |
4e0c91e4 L |
4475 | || !(bfd_link_executable (info) |
4476 | || SYMBOLIC_BIND (info, h)) | |
f5385ebf | 4477 | || !h->def_regular)) |
0bb2d96a | 4478 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
4479 | else |
4480 | { | |
5a15f56f | 4481 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 4482 | relocate = TRUE; |
5a15f56f | 4483 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
252b5132 RH |
4484 | } |
4485 | ||
cbe950e9 | 4486 | sreloc = elf_section_data (input_section)->sreloc; |
e7c33416 | 4487 | |
62d78908 L |
4488 | if (sreloc == NULL || sreloc->contents == NULL) |
4489 | { | |
4490 | r = bfd_reloc_notsupported; | |
4491 | goto check_relocation_error; | |
4492 | } | |
0c715baa | 4493 | |
59d6ffb2 | 4494 | elf_append_rel (output_bfd, sreloc, &outrel); |
252b5132 RH |
4495 | |
4496 | /* If this reloc is against an external symbol, we do | |
4497 | not want to fiddle with the addend. Otherwise, we | |
4498 | need to include the symbol value so that it becomes | |
4499 | an addend for the dynamic reloc. */ | |
0f88be7a | 4500 | if (! relocate) |
252b5132 RH |
4501 | continue; |
4502 | } | |
252b5132 RH |
4503 | break; |
4504 | ||
37e55690 | 4505 | case R_386_TLS_IE: |
0e1862bb | 4506 | if (!bfd_link_executable (info)) |
37e55690 | 4507 | { |
947216bf | 4508 | Elf_Internal_Rela outrel; |
37e55690 | 4509 | asection *sreloc; |
37e55690 JJ |
4510 | |
4511 | outrel.r_offset = rel->r_offset | |
4512 | + input_section->output_section->vma | |
4513 | + input_section->output_offset; | |
4514 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
4515 | sreloc = elf_section_data (input_section)->sreloc; | |
4516 | if (sreloc == NULL) | |
4517 | abort (); | |
59d6ffb2 | 4518 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
4519 | } |
4520 | /* Fall through */ | |
4521 | ||
13ae64f3 | 4522 | case R_386_TLS_GD: |
67a4f2b7 AO |
4523 | case R_386_TLS_GOTDESC: |
4524 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 4525 | case R_386_TLS_IE_32: |
37e55690 | 4526 | case R_386_TLS_GOTIE: |
13ae64f3 JJ |
4527 | tls_type = GOT_UNKNOWN; |
4528 | if (h == NULL && local_got_offsets) | |
4529 | tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx]; | |
4530 | else if (h != NULL) | |
142411ca | 4531 | tls_type = elf_i386_hash_entry(h)->tls_type; |
37e55690 JJ |
4532 | if (tls_type == GOT_TLS_IE) |
4533 | tls_type = GOT_TLS_IE_NEG; | |
142411ca L |
4534 | |
4535 | if (! elf_i386_tls_transition (info, input_bfd, | |
4536 | input_section, contents, | |
4537 | symtab_hdr, sym_hashes, | |
4538 | &r_type, tls_type, rel, | |
bedfd056 | 4539 | relend, h, r_symndx, TRUE)) |
142411ca | 4540 | return FALSE; |
13ae64f3 JJ |
4541 | |
4542 | if (r_type == R_386_TLS_LE_32) | |
4543 | { | |
82e51918 | 4544 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 JJ |
4545 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
4546 | { | |
142411ca | 4547 | unsigned int type; |
13ae64f3 JJ |
4548 | bfd_vma roff; |
4549 | ||
4550 | /* GD->LE transition. */ | |
6eaa7fb5 | 4551 | type = *(contents + rel->r_offset - 2); |
13ae64f3 JJ |
4552 | if (type == 0x04) |
4553 | { | |
6eaa7fb5 L |
4554 | /* Change |
4555 | leal foo@tlsgd(,%ebx,1), %eax | |
4556 | call ___tls_get_addr@PLT | |
4557 | into: | |
4558 | movl %gs:0, %eax | |
4559 | subl $foo@tpoff, %eax | |
13ae64f3 | 4560 | (6 byte form of subl). */ |
142411ca | 4561 | roff = rel->r_offset + 5; |
13ae64f3 JJ |
4562 | } |
4563 | else | |
4564 | { | |
6eaa7fb5 L |
4565 | /* Change |
4566 | leal foo@tlsgd(%ebx), %eax | |
4567 | call ___tls_get_addr@PLT | |
4568 | nop | |
4569 | or | |
4570 | leal foo@tlsgd(%reg), %eax | |
4571 | call *___tls_get_addr@GOT(%reg) | |
4572 | which may be converted to | |
4573 | addr32 call ___tls_get_addr | |
4574 | into: | |
4575 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
142411ca | 4576 | (6 byte form of subl). */ |
142411ca | 4577 | roff = rel->r_offset + 6; |
13ae64f3 | 4578 | } |
6eaa7fb5 L |
4579 | memcpy (contents + roff - 8, |
4580 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
eb4ff4d6 | 4581 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
13ae64f3 | 4582 | contents + roff); |
6eaa7fb5 | 4583 | /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */ |
13ae64f3 | 4584 | rel++; |
60f2e42e | 4585 | wrel++; |
13ae64f3 JJ |
4586 | continue; |
4587 | } | |
67a4f2b7 AO |
4588 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
4589 | { | |
4590 | /* GDesc -> LE transition. | |
4591 | It's originally something like: | |
4592 | leal x@tlsdesc(%ebx), %eax | |
4593 | ||
4594 | leal x@ntpoff, %eax | |
4595 | ||
4596 | Registers other than %eax may be set up here. */ | |
4597 | ||
142411ca | 4598 | unsigned int val; |
67a4f2b7 AO |
4599 | bfd_vma roff; |
4600 | ||
67a4f2b7 | 4601 | roff = rel->r_offset; |
67a4f2b7 | 4602 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
4603 | |
4604 | /* Now modify the instruction as appropriate. */ | |
4605 | /* aoliva FIXME: remove the above and xor the byte | |
4606 | below with 0x86. */ | |
4607 | bfd_put_8 (output_bfd, val ^ 0x86, | |
4608 | contents + roff - 1); | |
eb4ff4d6 | 4609 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
67a4f2b7 AO |
4610 | contents + roff); |
4611 | continue; | |
4612 | } | |
4613 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
4614 | { | |
4615 | /* GDesc -> LE transition. | |
4616 | It's originally: | |
4617 | call *(%eax) | |
4618 | Turn it into: | |
142411ca | 4619 | xchg %ax,%ax */ |
67a4f2b7 | 4620 | |
67a4f2b7 | 4621 | bfd_vma roff; |
6bbec505 | 4622 | |
67a4f2b7 | 4623 | roff = rel->r_offset; |
10efb593 | 4624 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
4625 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4626 | continue; | |
4627 | } | |
37e55690 | 4628 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE) |
13ae64f3 | 4629 | { |
142411ca | 4630 | unsigned int val; |
13ae64f3 JJ |
4631 | |
4632 | /* IE->LE transition: | |
37e55690 JJ |
4633 | Originally it can be one of: |
4634 | movl foo, %eax | |
4635 | movl foo, %reg | |
4636 | addl foo, %reg | |
4637 | We change it into: | |
4638 | movl $foo, %eax | |
4639 | movl $foo, %reg | |
4640 | addl $foo, %reg. */ | |
37e55690 | 4641 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
37e55690 JJ |
4642 | if (val == 0xa1) |
4643 | { | |
4644 | /* movl foo, %eax. */ | |
55fd94b0 AM |
4645 | bfd_put_8 (output_bfd, 0xb8, |
4646 | contents + rel->r_offset - 1); | |
37e55690 | 4647 | } |
299bf759 | 4648 | else |
37e55690 | 4649 | { |
142411ca L |
4650 | unsigned int type; |
4651 | ||
55fd94b0 AM |
4652 | type = bfd_get_8 (input_bfd, |
4653 | contents + rel->r_offset - 2); | |
299bf759 | 4654 | switch (type) |
26e41594 | 4655 | { |
299bf759 L |
4656 | case 0x8b: |
4657 | /* movl */ | |
299bf759 L |
4658 | bfd_put_8 (output_bfd, 0xc7, |
4659 | contents + rel->r_offset - 2); | |
4660 | bfd_put_8 (output_bfd, | |
4661 | 0xc0 | ((val >> 3) & 7), | |
4662 | contents + rel->r_offset - 1); | |
4663 | break; | |
4664 | case 0x03: | |
4665 | /* addl */ | |
299bf759 L |
4666 | bfd_put_8 (output_bfd, 0x81, |
4667 | contents + rel->r_offset - 2); | |
4668 | bfd_put_8 (output_bfd, | |
4669 | 0xc0 | ((val >> 3) & 7), | |
4670 | contents + rel->r_offset - 1); | |
4671 | break; | |
4672 | default: | |
4673 | BFD_FAIL (); | |
4674 | break; | |
26e41594 | 4675 | } |
37e55690 | 4676 | } |
eb4ff4d6 | 4677 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
4678 | contents + rel->r_offset); |
4679 | continue; | |
4680 | } | |
4681 | else | |
4682 | { | |
4683 | unsigned int val, type; | |
4684 | ||
4685 | /* {IE_32,GOTIE}->LE transition: | |
4686 | Originally it can be one of: | |
13ae64f3 | 4687 | subl foo(%reg1), %reg2 |
13ae64f3 | 4688 | movl foo(%reg1), %reg2 |
37e55690 | 4689 | addl foo(%reg1), %reg2 |
13ae64f3 JJ |
4690 | We change it into: |
4691 | subl $foo, %reg2 | |
37e55690 JJ |
4692 | movl $foo, %reg2 (6 byte form) |
4693 | addl $foo, %reg2. */ | |
13ae64f3 JJ |
4694 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
4695 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
13ae64f3 JJ |
4696 | if (type == 0x8b) |
4697 | { | |
4698 | /* movl */ | |
13ae64f3 JJ |
4699 | bfd_put_8 (output_bfd, 0xc7, |
4700 | contents + rel->r_offset - 2); | |
4701 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4702 | contents + rel->r_offset - 1); | |
4703 | } | |
4704 | else if (type == 0x2b) | |
4705 | { | |
4706 | /* subl */ | |
13ae64f3 JJ |
4707 | bfd_put_8 (output_bfd, 0x81, |
4708 | contents + rel->r_offset - 2); | |
4709 | bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7), | |
4710 | contents + rel->r_offset - 1); | |
4711 | } | |
37e55690 JJ |
4712 | else if (type == 0x03) |
4713 | { | |
4714 | /* addl */ | |
4715 | bfd_put_8 (output_bfd, 0x81, | |
4716 | contents + rel->r_offset - 2); | |
4717 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4718 | contents + rel->r_offset - 1); | |
4719 | } | |
13ae64f3 JJ |
4720 | else |
4721 | BFD_FAIL (); | |
37e55690 | 4722 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE) |
eb4ff4d6 | 4723 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
4724 | contents + rel->r_offset); |
4725 | else | |
eb4ff4d6 | 4726 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
37e55690 | 4727 | contents + rel->r_offset); |
13ae64f3 JJ |
4728 | continue; |
4729 | } | |
4730 | } | |
4731 | ||
6de2ae4a | 4732 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
4733 | abort (); |
4734 | ||
4735 | if (h != NULL) | |
67a4f2b7 AO |
4736 | { |
4737 | off = h->got.offset; | |
4738 | offplt = elf_i386_hash_entry (h)->tlsdesc_got; | |
4739 | } | |
13ae64f3 JJ |
4740 | else |
4741 | { | |
4742 | if (local_got_offsets == NULL) | |
4743 | abort (); | |
4744 | ||
4745 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 4746 | offplt = local_tlsdesc_gotents[r_symndx]; |
13ae64f3 JJ |
4747 | } |
4748 | ||
4749 | if ((off & 1) != 0) | |
4750 | off &= ~1; | |
26e41594 | 4751 | else |
13ae64f3 | 4752 | { |
947216bf | 4753 | Elf_Internal_Rela outrel; |
91d6fa6a | 4754 | int dr_type; |
67a4f2b7 | 4755 | asection *sreloc; |
13ae64f3 | 4756 | |
6de2ae4a | 4757 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
4758 | abort (); |
4759 | ||
67a4f2b7 AO |
4760 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4761 | ||
4762 | if (GOT_TLS_GDESC_P (tls_type)) | |
4763 | { | |
59d6ffb2 | 4764 | bfd_byte *loc; |
67a4f2b7 AO |
4765 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC); |
4766 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8 | |
6de2ae4a L |
4767 | <= htab->elf.sgotplt->size); |
4768 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4769 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4770 | + offplt |
4771 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4772 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4773 | loc = sreloc->contents; |
5ae0bfb6 RS |
4774 | loc += (htab->next_tls_desc_index++ |
4775 | * sizeof (Elf32_External_Rel)); | |
67a4f2b7 | 4776 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
c3b02097 | 4777 | <= sreloc->contents + sreloc->size); |
67a4f2b7 AO |
4778 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
4779 | if (indx == 0) | |
4780 | { | |
4781 | BFD_ASSERT (! unresolved_reloc); | |
4782 | bfd_put_32 (output_bfd, | |
eb4ff4d6 | 4783 | relocation - elf_i386_dtpoff_base (info), |
6de2ae4a | 4784 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4785 | + htab->sgotplt_jump_table_size + 4); |
4786 | } | |
4787 | else | |
4788 | { | |
4789 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4790 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4791 | + htab->sgotplt_jump_table_size + 4); |
4792 | } | |
4793 | } | |
4794 | ||
6de2ae4a | 4795 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4796 | |
6de2ae4a L |
4797 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4798 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 | 4799 | |
67a4f2b7 | 4800 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 | 4801 | dr_type = R_386_TLS_DTPMOD32; |
67a4f2b7 AO |
4802 | else if (GOT_TLS_GDESC_P (tls_type)) |
4803 | goto dr_done; | |
37e55690 JJ |
4804 | else if (tls_type == GOT_TLS_IE_POS) |
4805 | dr_type = R_386_TLS_TPOFF; | |
13ae64f3 JJ |
4806 | else |
4807 | dr_type = R_386_TLS_TPOFF32; | |
67a4f2b7 | 4808 | |
37e55690 | 4809 | if (dr_type == R_386_TLS_TPOFF && indx == 0) |
eb4ff4d6 L |
4810 | bfd_put_32 (output_bfd, |
4811 | relocation - elf_i386_dtpoff_base (info), | |
6de2ae4a | 4812 | htab->elf.sgot->contents + off); |
37e55690 | 4813 | else if (dr_type == R_386_TLS_TPOFF32 && indx == 0) |
23209a78 | 4814 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 4815 | elf_i386_dtpoff_base (info) - relocation, |
6de2ae4a | 4816 | htab->elf.sgot->contents + off); |
67a4f2b7 | 4817 | else if (dr_type != R_386_TLS_DESC) |
c366c25e | 4818 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 4819 | htab->elf.sgot->contents + off); |
13ae64f3 | 4820 | outrel.r_info = ELF32_R_INFO (indx, dr_type); |
67a4f2b7 | 4821 | |
59d6ffb2 | 4822 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 | 4823 | |
67a4f2b7 | 4824 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 JJ |
4825 | { |
4826 | if (indx == 0) | |
4827 | { | |
82e51918 | 4828 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 | 4829 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 4830 | relocation - elf_i386_dtpoff_base (info), |
6de2ae4a | 4831 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4832 | } |
4833 | else | |
4834 | { | |
4835 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4836 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4837 | outrel.r_info = ELF32_R_INFO (indx, |
4838 | R_386_TLS_DTPOFF32); | |
4839 | outrel.r_offset += 4; | |
59d6ffb2 | 4840 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 JJ |
4841 | } |
4842 | } | |
37e55690 JJ |
4843 | else if (tls_type == GOT_TLS_IE_BOTH) |
4844 | { | |
4845 | bfd_put_32 (output_bfd, | |
eb4ff4d6 L |
4846 | (indx == 0 |
4847 | ? relocation - elf_i386_dtpoff_base (info) | |
4848 | : 0), | |
6de2ae4a | 4849 | htab->elf.sgot->contents + off + 4); |
37e55690 JJ |
4850 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); |
4851 | outrel.r_offset += 4; | |
59d6ffb2 | 4852 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 | 4853 | } |
13ae64f3 | 4854 | |
67a4f2b7 | 4855 | dr_done: |
13ae64f3 JJ |
4856 | if (h != NULL) |
4857 | h->got.offset |= 1; | |
4858 | else | |
4859 | local_got_offsets[r_symndx] |= 1; | |
4860 | } | |
4861 | ||
67a4f2b7 AO |
4862 | if (off >= (bfd_vma) -2 |
4863 | && ! GOT_TLS_GDESC_P (tls_type)) | |
13ae64f3 | 4864 | abort (); |
67a4f2b7 AO |
4865 | if (r_type == R_386_TLS_GOTDESC |
4866 | || r_type == R_386_TLS_DESC_CALL) | |
4867 | { | |
4868 | relocation = htab->sgotplt_jump_table_size + offplt; | |
4869 | unresolved_reloc = FALSE; | |
4870 | } | |
4871 | else if (r_type == ELF32_R_TYPE (rel->r_info)) | |
13ae64f3 | 4872 | { |
6de2ae4a L |
4873 | bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma |
4874 | + htab->elf.sgotplt->output_offset; | |
4875 | relocation = htab->elf.sgot->output_section->vma | |
4876 | + htab->elf.sgot->output_offset + off - g_o_t; | |
37e55690 JJ |
4877 | if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE) |
4878 | && tls_type == GOT_TLS_IE_BOTH) | |
4879 | relocation += 4; | |
4880 | if (r_type == R_386_TLS_IE) | |
8c37241b | 4881 | relocation += g_o_t; |
b34976b6 | 4882 | unresolved_reloc = FALSE; |
13ae64f3 | 4883 | } |
67a4f2b7 | 4884 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
13ae64f3 JJ |
4885 | { |
4886 | unsigned int val, type; | |
4887 | bfd_vma roff; | |
4888 | ||
4889 | /* GD->IE transition. */ | |
6eaa7fb5 L |
4890 | type = *(contents + rel->r_offset - 2); |
4891 | val = *(contents + rel->r_offset - 1); | |
13ae64f3 JJ |
4892 | if (type == 0x04) |
4893 | { | |
6eaa7fb5 L |
4894 | /* Change |
4895 | leal foo@tlsgd(,%ebx,1), %eax | |
4896 | call ___tls_get_addr@PLT | |
4897 | into: | |
4898 | movl %gs:0, %eax | |
4899 | subl $foo@gottpoff(%ebx), %eax. */ | |
13ae64f3 | 4900 | val >>= 3; |
142411ca | 4901 | roff = rel->r_offset - 3; |
13ae64f3 JJ |
4902 | } |
4903 | else | |
4904 | { | |
6eaa7fb5 L |
4905 | /* Change |
4906 | leal foo@tlsgd(%ebx), %eax | |
4907 | call ___tls_get_addr@PLT | |
4908 | nop | |
4909 | or | |
4910 | leal foo@tlsgd(%reg), %eax | |
4911 | call *___tls_get_addr@GOT(%reg) | |
4912 | which may be converted to | |
4913 | addr32 call ___tls_get_addr | |
4914 | into: | |
4915 | movl %gs:0, %eax; | |
4916 | subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 JJ |
4917 | roff = rel->r_offset - 2; |
4918 | } | |
4919 | memcpy (contents + roff, | |
4920 | "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12); | |
4921 | contents[roff + 7] = 0x80 | (val & 7); | |
37e55690 JJ |
4922 | /* If foo is used only with foo@gotntpoff(%reg) and |
4923 | foo@indntpoff, but not with foo@gottpoff(%reg), change | |
4924 | subl $foo@gottpoff(%reg), %eax | |
4925 | into: | |
4926 | addl $foo@gotntpoff(%reg), %eax. */ | |
ebcfb3c0 JJ |
4927 | if (tls_type == GOT_TLS_IE_POS) |
4928 | contents[roff + 6] = 0x03; | |
8c37241b | 4929 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4930 | htab->elf.sgot->output_section->vma |
4931 | + htab->elf.sgot->output_offset + off | |
4932 | - htab->elf.sgotplt->output_section->vma | |
4933 | - htab->elf.sgotplt->output_offset, | |
13ae64f3 | 4934 | contents + roff + 8); |
6eaa7fb5 | 4935 | /* Skip R_386_PLT32 and R_386_GOT32X. */ |
13ae64f3 | 4936 | rel++; |
60f2e42e | 4937 | wrel++; |
13ae64f3 JJ |
4938 | continue; |
4939 | } | |
67a4f2b7 AO |
4940 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
4941 | { | |
4942 | /* GDesc -> IE transition. | |
4943 | It's originally something like: | |
4944 | leal x@tlsdesc(%ebx), %eax | |
4945 | ||
4946 | Change it to: | |
142411ca | 4947 | movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax |
67a4f2b7 AO |
4948 | or: |
4949 | movl x@gottpoff(%ebx), %eax # before negl %eax | |
4950 | ||
4951 | Registers other than %eax may be set up here. */ | |
4952 | ||
67a4f2b7 AO |
4953 | bfd_vma roff; |
4954 | ||
4955 | /* First, make sure it's a leal adding ebx to a 32-bit | |
4956 | offset into any register, although it's probably | |
4957 | almost always going to be eax. */ | |
4958 | roff = rel->r_offset; | |
67a4f2b7 AO |
4959 | |
4960 | /* Now modify the instruction as appropriate. */ | |
4961 | /* To turn a leal into a movl in the form we use it, it | |
4962 | suffices to change the first byte from 0x8d to 0x8b. | |
4963 | aoliva FIXME: should we decide to keep the leal, all | |
4964 | we have to do is remove the statement below, and | |
4965 | adjust the relaxation of R_386_TLS_DESC_CALL. */ | |
4966 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
4967 | ||
4968 | if (tls_type == GOT_TLS_IE_BOTH) | |
4969 | off += 4; | |
4970 | ||
4971 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4972 | htab->elf.sgot->output_section->vma |
4973 | + htab->elf.sgot->output_offset + off | |
4974 | - htab->elf.sgotplt->output_section->vma | |
4975 | - htab->elf.sgotplt->output_offset, | |
67a4f2b7 AO |
4976 | contents + roff); |
4977 | continue; | |
4978 | } | |
4979 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
4980 | { | |
4981 | /* GDesc -> IE transition. | |
4982 | It's originally: | |
4983 | call *(%eax) | |
4984 | ||
4985 | Change it to: | |
142411ca | 4986 | xchg %ax,%ax |
67a4f2b7 AO |
4987 | or |
4988 | negl %eax | |
4989 | depending on how we transformed the TLS_GOTDESC above. | |
4990 | */ | |
4991 | ||
67a4f2b7 AO |
4992 | bfd_vma roff; |
4993 | ||
67a4f2b7 | 4994 | roff = rel->r_offset; |
67a4f2b7 AO |
4995 | |
4996 | /* Now modify the instruction as appropriate. */ | |
4997 | if (tls_type != GOT_TLS_IE_NEG) | |
4998 | { | |
10efb593 L |
4999 | /* xchg %ax,%ax */ |
5000 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
5001 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
5002 | } | |
5003 | else | |
5004 | { | |
5005 | /* negl %eax */ | |
5006 | bfd_put_8 (output_bfd, 0xf7, contents + roff); | |
5007 | bfd_put_8 (output_bfd, 0xd8, contents + roff + 1); | |
5008 | } | |
5009 | ||
5010 | continue; | |
5011 | } | |
5012 | else | |
5013 | BFD_ASSERT (FALSE); | |
13ae64f3 JJ |
5014 | break; |
5015 | ||
5016 | case R_386_TLS_LDM: | |
142411ca L |
5017 | if (! elf_i386_tls_transition (info, input_bfd, |
5018 | input_section, contents, | |
5019 | symtab_hdr, sym_hashes, | |
5020 | &r_type, GOT_UNKNOWN, rel, | |
bedfd056 | 5021 | relend, h, r_symndx, TRUE)) |
142411ca | 5022 | return FALSE; |
13ae64f3 | 5023 | |
142411ca L |
5024 | if (r_type != R_386_TLS_LDM) |
5025 | { | |
6eaa7fb5 L |
5026 | /* LD->LE transition. Change |
5027 | leal foo@tlsldm(%ebx) %eax | |
5028 | call ___tls_get_addr@PLT | |
5029 | into: | |
5030 | movl %gs:0, %eax | |
5031 | nop | |
5032 | leal 0(%esi,1), %esi | |
5033 | or change | |
5034 | leal foo@tlsldm(%reg) %eax | |
5035 | call *___tls_get_addr@GOT(%reg) | |
5036 | which may be converted to | |
5037 | addr32 call ___tls_get_addr | |
5038 | into: | |
5039 | movl %gs:0, %eax | |
5040 | leal 0(%esi), %esi */ | |
142411ca | 5041 | BFD_ASSERT (r_type == R_386_TLS_LE_32); |
6eaa7fb5 L |
5042 | if (*(contents + rel->r_offset + 4) == 0xff |
5043 | || *(contents + rel->r_offset + 4) == 0x67) | |
5044 | memcpy (contents + rel->r_offset - 2, | |
5045 | "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12); | |
5046 | else | |
5047 | memcpy (contents + rel->r_offset - 2, | |
5048 | "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11); | |
a3fadc9a | 5049 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 | 5050 | rel++; |
60f2e42e | 5051 | wrel++; |
13ae64f3 JJ |
5052 | continue; |
5053 | } | |
5054 | ||
6de2ae4a | 5055 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
5056 | abort (); |
5057 | ||
5058 | off = htab->tls_ldm_got.offset; | |
5059 | if (off & 1) | |
5060 | off &= ~1; | |
5061 | else | |
5062 | { | |
947216bf | 5063 | Elf_Internal_Rela outrel; |
13ae64f3 | 5064 | |
6de2ae4a | 5065 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
5066 | abort (); |
5067 | ||
6de2ae4a L |
5068 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5069 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 JJ |
5070 | |
5071 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 5072 | htab->elf.sgot->contents + off); |
13ae64f3 | 5073 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 5074 | htab->elf.sgot->contents + off + 4); |
13ae64f3 | 5075 | outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32); |
59d6ffb2 | 5076 | elf_append_rel (output_bfd, htab->elf.srelgot, &outrel); |
13ae64f3 JJ |
5077 | htab->tls_ldm_got.offset |= 1; |
5078 | } | |
6de2ae4a L |
5079 | relocation = htab->elf.sgot->output_section->vma |
5080 | + htab->elf.sgot->output_offset + off | |
5081 | - htab->elf.sgotplt->output_section->vma | |
5082 | - htab->elf.sgotplt->output_offset; | |
b34976b6 | 5083 | unresolved_reloc = FALSE; |
13ae64f3 JJ |
5084 | break; |
5085 | ||
5086 | case R_386_TLS_LDO_32: | |
0e1862bb L |
5087 | if (!bfd_link_executable (info) |
5088 | || (input_section->flags & SEC_CODE) == 0) | |
eb4ff4d6 | 5089 | relocation -= elf_i386_dtpoff_base (info); |
13ae64f3 JJ |
5090 | else |
5091 | /* When converting LDO to LE, we must negate. */ | |
eb4ff4d6 | 5092 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
5093 | break; |
5094 | ||
5095 | case R_386_TLS_LE_32: | |
13ae64f3 | 5096 | case R_386_TLS_LE: |
0e1862bb | 5097 | if (!bfd_link_executable (info)) |
37e55690 | 5098 | { |
947216bf | 5099 | Elf_Internal_Rela outrel; |
37e55690 | 5100 | asection *sreloc; |
37e55690 JJ |
5101 | |
5102 | outrel.r_offset = rel->r_offset | |
5103 | + input_section->output_section->vma | |
5104 | + input_section->output_offset; | |
5105 | if (h != NULL && h->dynindx != -1) | |
5106 | indx = h->dynindx; | |
5107 | else | |
5108 | indx = 0; | |
5109 | if (r_type == R_386_TLS_LE_32) | |
5110 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32); | |
5111 | else | |
5112 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); | |
5113 | sreloc = elf_section_data (input_section)->sreloc; | |
5114 | if (sreloc == NULL) | |
5115 | abort (); | |
59d6ffb2 | 5116 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
5117 | if (indx) |
5118 | continue; | |
5119 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 5120 | relocation = elf_i386_dtpoff_base (info) - relocation; |
37e55690 | 5121 | else |
eb4ff4d6 | 5122 | relocation -= elf_i386_dtpoff_base (info); |
37e55690 JJ |
5123 | } |
5124 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 5125 | relocation = elf_i386_tpoff (info, relocation); |
37e55690 | 5126 | else |
eb4ff4d6 | 5127 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
5128 | break; |
5129 | ||
252b5132 RH |
5130 | default: |
5131 | break; | |
5132 | } | |
5133 | ||
239e1f3a AM |
5134 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
5135 | because such sections are not SEC_ALLOC and thus ld.so will | |
5136 | not process them. */ | |
8c694914 | 5137 | if (unresolved_reloc |
239e1f3a | 5138 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
5139 | && h->def_dynamic) |
5140 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
5141 | rel->r_offset) != (bfd_vma) -1) | |
6a30718d | 5142 | { |
4eca0228 | 5143 | _bfd_error_handler |
695344c0 | 5144 | /* xgettext:c-format */ |
843fe662 | 5145 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
5146 | input_bfd, |
5147 | input_section, | |
6a30718d | 5148 | (long) rel->r_offset, |
843fe662 | 5149 | howto->name, |
6a30718d | 5150 | h->root.root.string); |
b34976b6 | 5151 | return FALSE; |
6a30718d | 5152 | } |
83be169b | 5153 | |
cbe950e9 | 5154 | do_relocation: |
252b5132 RH |
5155 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
5156 | contents, rel->r_offset, | |
55fd94b0 | 5157 | relocation, 0); |
252b5132 | 5158 | |
62d78908 | 5159 | check_relocation_error: |
cf5c0c5b | 5160 | if (r != bfd_reloc_ok) |
252b5132 | 5161 | { |
cf5c0c5b | 5162 | const char *name; |
ffb2e45b | 5163 | |
cf5c0c5b AM |
5164 | if (h != NULL) |
5165 | name = h->root.root.string; | |
5166 | else | |
5167 | { | |
5168 | name = bfd_elf_string_from_elf_section (input_bfd, | |
5169 | symtab_hdr->sh_link, | |
5170 | sym->st_name); | |
5171 | if (name == NULL) | |
b34976b6 | 5172 | return FALSE; |
cf5c0c5b AM |
5173 | if (*name == '\0') |
5174 | name = bfd_section_name (input_bfd, sec); | |
5175 | } | |
ffb2e45b | 5176 | |
cf5c0c5b | 5177 | if (r == bfd_reloc_overflow) |
1a72702b AM |
5178 | (*info->callbacks->reloc_overflow) |
5179 | (info, (h ? &h->root : NULL), name, howto->name, | |
5180 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
cf5c0c5b AM |
5181 | else |
5182 | { | |
4eca0228 | 5183 | _bfd_error_handler |
695344c0 | 5184 | /* xgettext:c-format */ |
d003868e AM |
5185 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
5186 | input_bfd, input_section, | |
cf5c0c5b | 5187 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 5188 | return FALSE; |
cf5c0c5b | 5189 | } |
252b5132 | 5190 | } |
60f2e42e L |
5191 | |
5192 | if (wrel != rel) | |
5193 | *wrel = *rel; | |
5194 | } | |
5195 | ||
5196 | if (wrel != rel) | |
5197 | { | |
5198 | Elf_Internal_Shdr *rel_hdr; | |
5199 | size_t deleted = rel - wrel; | |
5200 | ||
5201 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
5202 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5203 | if (rel_hdr->sh_size == 0) | |
5204 | { | |
5205 | /* It is too late to remove an empty reloc section. Leave | |
5206 | one NONE reloc. | |
5207 | ??? What is wrong with an empty section??? */ | |
5208 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
5209 | deleted -= 1; | |
5210 | } | |
5211 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
5212 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5213 | input_section->reloc_count -= deleted; | |
252b5132 RH |
5214 | } |
5215 | ||
b34976b6 | 5216 | return TRUE; |
252b5132 RH |
5217 | } |
5218 | ||
5219 | /* Finish up dynamic symbol handling. We set the contents of various | |
5220 | dynamic sections here. */ | |
5221 | ||
b34976b6 | 5222 | static bfd_boolean |
55fd94b0 AM |
5223 | elf_i386_finish_dynamic_symbol (bfd *output_bfd, |
5224 | struct bfd_link_info *info, | |
5225 | struct elf_link_hash_entry *h, | |
5226 | Elf_Internal_Sym *sym) | |
252b5132 | 5227 | { |
6725bdbf | 5228 | struct elf_i386_link_hash_table *htab; |
25e762b9 RM |
5229 | unsigned plt_entry_size; |
5230 | const struct elf_i386_backend_data *abed; | |
dd7e64d4 | 5231 | struct elf_i386_link_hash_entry *eh; |
aec6b87e | 5232 | bfd_boolean local_undefweak; |
252b5132 | 5233 | |
6725bdbf | 5234 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
5235 | if (htab == NULL) |
5236 | return FALSE; | |
252b5132 | 5237 | |
25e762b9 RM |
5238 | abed = get_elf_i386_backend_data (output_bfd); |
5239 | plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd); | |
5240 | ||
dd7e64d4 L |
5241 | eh = (struct elf_i386_link_hash_entry *) h; |
5242 | ||
aec6b87e L |
5243 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
5244 | resolved undefined weak symbols in executable so that their | |
5245 | references have value 0 at run-time. */ | |
e62b9723 L |
5246 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
5247 | eh->has_got_reloc, | |
5248 | eh); | |
aec6b87e | 5249 | |
252b5132 RH |
5250 | if (h->plt.offset != (bfd_vma) -1) |
5251 | { | |
252b5132 RH |
5252 | bfd_vma plt_index; |
5253 | bfd_vma got_offset; | |
947216bf AM |
5254 | Elf_Internal_Rela rel; |
5255 | bfd_byte *loc; | |
cbe950e9 L |
5256 | asection *plt, *gotplt, *relplt; |
5257 | ||
5258 | /* When building a static executable, use .iplt, .igot.plt and | |
5259 | .rel.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 5260 | if (htab->elf.splt != NULL) |
cbe950e9 | 5261 | { |
6de2ae4a L |
5262 | plt = htab->elf.splt; |
5263 | gotplt = htab->elf.sgotplt; | |
5264 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
5265 | } |
5266 | else | |
5267 | { | |
6de2ae4a L |
5268 | plt = htab->elf.iplt; |
5269 | gotplt = htab->elf.igotplt; | |
5270 | relplt = htab->elf.irelplt; | |
cbe950e9 | 5271 | } |
252b5132 RH |
5272 | |
5273 | /* This symbol has an entry in the procedure linkage table. Set | |
5274 | it up. */ | |
5275 | ||
cbe950e9 | 5276 | if ((h->dynindx == -1 |
aec6b87e | 5277 | && !local_undefweak |
0e1862bb | 5278 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
5279 | && h->def_regular |
5280 | && h->type == STT_GNU_IFUNC)) | |
5281 | || plt == NULL | |
5282 | || gotplt == NULL | |
5283 | || relplt == NULL) | |
cec7f46a | 5284 | abort (); |
252b5132 RH |
5285 | |
5286 | /* Get the index in the procedure linkage table which | |
5287 | corresponds to this symbol. This is the index of this symbol | |
5288 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 5289 | first entry in the procedure linkage table is reserved. |
252b5132 | 5290 | |
cbe950e9 | 5291 | Get the offset into the .got table of the entry that |
252b5132 | 5292 | corresponds to this function. Each .got entry is 4 bytes. |
cbe950e9 | 5293 | The first three are reserved. |
6bbec505 | 5294 | |
cbe950e9 L |
5295 | For static executables, we don't reserve anything. */ |
5296 | ||
6de2ae4a | 5297 | if (plt == htab->elf.splt) |
cbe950e9 | 5298 | { |
e1f98742 L |
5299 | got_offset = h->plt.offset / plt_entry_size - 1; |
5300 | got_offset = (got_offset + 3) * 4; | |
cbe950e9 L |
5301 | } |
5302 | else | |
5303 | { | |
e1f98742 L |
5304 | got_offset = h->plt.offset / plt_entry_size; |
5305 | got_offset = got_offset * 4; | |
cbe950e9 | 5306 | } |
252b5132 RH |
5307 | |
5308 | /* Fill in the entry in the procedure linkage table. */ | |
0e1862bb | 5309 | if (! bfd_link_pic (info)) |
252b5132 | 5310 | { |
25e762b9 RM |
5311 | memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry, |
5312 | abed->plt->plt_entry_size); | |
252b5132 | 5313 | bfd_put_32 (output_bfd, |
cbe950e9 L |
5314 | (gotplt->output_section->vma |
5315 | + gotplt->output_offset | |
252b5132 | 5316 | + got_offset), |
25e762b9 RM |
5317 | plt->contents + h->plt.offset |
5318 | + abed->plt->plt_got_offset); | |
eac338cf | 5319 | |
25e762b9 | 5320 | if (abed->is_vxworks) |
eac338cf PB |
5321 | { |
5322 | int s, k, reloc_index; | |
5323 | ||
5324 | /* Create the R_386_32 relocation referencing the GOT | |
5325 | for this PLT entry. */ | |
5326 | ||
5327 | /* S: Current slot number (zero-based). */ | |
25e762b9 RM |
5328 | s = ((h->plt.offset - abed->plt->plt_entry_size) |
5329 | / abed->plt->plt_entry_size); | |
eac338cf | 5330 | /* K: Number of relocations for PLTResolve. */ |
0e1862bb | 5331 | if (bfd_link_pic (info)) |
eac338cf PB |
5332 | k = PLTRESOLVE_RELOCS_SHLIB; |
5333 | else | |
5334 | k = PLTRESOLVE_RELOCS; | |
5335 | /* Skip the PLTresolve relocations, and the relocations for | |
5336 | the other PLT slots. */ | |
5337 | reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS; | |
5338 | loc = (htab->srelplt2->contents + reloc_index | |
5339 | * sizeof (Elf32_External_Rel)); | |
5340 | ||
6de2ae4a L |
5341 | rel.r_offset = (htab->elf.splt->output_section->vma |
5342 | + htab->elf.splt->output_offset | |
eac338cf | 5343 | + h->plt.offset + 2), |
7325306f | 5344 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5345 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
5346 | ||
5347 | /* Create the R_386_32 relocation referencing the beginning of | |
5348 | the PLT for this GOT entry. */ | |
6de2ae4a L |
5349 | rel.r_offset = (htab->elf.sgotplt->output_section->vma |
5350 | + htab->elf.sgotplt->output_offset | |
eac338cf | 5351 | + got_offset); |
7325306f | 5352 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf | 5353 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
13ca3149 | 5354 | loc + sizeof (Elf32_External_Rel)); |
eac338cf | 5355 | } |
252b5132 RH |
5356 | } |
5357 | else | |
5358 | { | |
25e762b9 RM |
5359 | memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry, |
5360 | abed->plt->plt_entry_size); | |
252b5132 | 5361 | bfd_put_32 (output_bfd, got_offset, |
25e762b9 RM |
5362 | plt->contents + h->plt.offset |
5363 | + abed->plt->plt_got_offset); | |
252b5132 RH |
5364 | } |
5365 | ||
aec6b87e L |
5366 | /* Fill in the entry in the global offset table. Leave the entry |
5367 | as zero for undefined weak symbol in PIE. No PLT relocation | |
5368 | against undefined weak symbol in PIE. */ | |
5369 | if (!local_undefweak) | |
cbe950e9 | 5370 | { |
cbe950e9 | 5371 | bfd_put_32 (output_bfd, |
aec6b87e L |
5372 | (plt->output_section->vma |
5373 | + plt->output_offset | |
5374 | + h->plt.offset | |
5375 | + abed->plt->plt_lazy_offset), | |
cbe950e9 | 5376 | gotplt->contents + got_offset); |
252b5132 | 5377 | |
aec6b87e L |
5378 | /* Fill in the entry in the .rel.plt section. */ |
5379 | rel.r_offset = (gotplt->output_section->vma | |
5380 | + gotplt->output_offset | |
5381 | + got_offset); | |
5382 | if (h->dynindx == -1 | |
5383 | || ((bfd_link_executable (info) | |
5384 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
5385 | && h->def_regular | |
5386 | && h->type == STT_GNU_IFUNC)) | |
5387 | { | |
5388 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
5389 | R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend | |
5390 | in the .got.plt section. */ | |
5391 | bfd_put_32 (output_bfd, | |
5392 | (h->root.u.def.value | |
5393 | + h->root.u.def.section->output_section->vma | |
5394 | + h->root.u.def.section->output_offset), | |
5395 | gotplt->contents + got_offset); | |
5396 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
5397 | /* R_386_IRELATIVE comes last. */ | |
5398 | plt_index = htab->next_irelative_index--; | |
5399 | } | |
5400 | else | |
5401 | { | |
5402 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
5403 | plt_index = htab->next_jump_slot_index++; | |
5404 | } | |
5405 | ||
5406 | loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel); | |
5407 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
5408 | ||
5409 | /* Don't fill PLT entry for static executables. */ | |
5410 | if (plt == htab->elf.splt) | |
5411 | { | |
5412 | bfd_put_32 (output_bfd, | |
5413 | plt_index * sizeof (Elf32_External_Rel), | |
5414 | plt->contents + h->plt.offset | |
5415 | + abed->plt->plt_reloc_offset); | |
5416 | bfd_put_32 (output_bfd, - (h->plt.offset | |
5417 | + abed->plt->plt_plt_offset + 4), | |
5418 | plt->contents + h->plt.offset | |
5419 | + abed->plt->plt_plt_offset); | |
5420 | } | |
e1f98742 | 5421 | } |
dd7e64d4 L |
5422 | } |
5423 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
5424 | { | |
5425 | bfd_vma got_offset, plt_offset; | |
5426 | asection *plt, *got, *gotplt; | |
5427 | const bfd_byte *got_plt_entry; | |
5428 | ||
5429 | /* Offset of displacement of the indirect jump. */ | |
5430 | bfd_vma plt_got_offset = 2; | |
e1f98742 | 5431 | |
dd7e64d4 L |
5432 | /* Set the entry in the GOT procedure linkage table. */ |
5433 | plt = htab->plt_got; | |
5434 | got = htab->elf.sgot; | |
5435 | gotplt = htab->elf.sgotplt; | |
5436 | got_offset = h->got.offset; | |
5437 | ||
5438 | if (got_offset == (bfd_vma) -1 | |
5439 | || plt == NULL | |
5440 | || got == NULL | |
5441 | || gotplt == NULL) | |
5442 | abort (); | |
5443 | ||
5444 | /* Fill in the entry in the GOT procedure linkage table. */ | |
0e1862bb | 5445 | if (! bfd_link_pic (info)) |
252b5132 | 5446 | { |
dd7e64d4 L |
5447 | got_plt_entry = elf_i386_got_plt_entry; |
5448 | got_offset += got->output_section->vma + got->output_offset; | |
252b5132 | 5449 | } |
dd7e64d4 L |
5450 | else |
5451 | { | |
5452 | got_plt_entry = elf_i386_pic_got_plt_entry; | |
5453 | got_offset += (got->output_section->vma | |
5454 | + got->output_offset | |
5455 | - gotplt->output_section->vma | |
5456 | - gotplt->output_offset); | |
5457 | } | |
5458 | ||
5459 | plt_offset = eh->plt_got.offset; | |
5460 | memcpy (plt->contents + plt_offset, got_plt_entry, | |
5461 | sizeof (elf_i386_got_plt_entry)); | |
5462 | bfd_put_32 (output_bfd, got_offset, | |
5463 | plt->contents + plt_offset + plt_got_offset); | |
5464 | } | |
5465 | ||
aec6b87e L |
5466 | if (!local_undefweak |
5467 | && !h->def_regular | |
dd7e64d4 L |
5468 | && (h->plt.offset != (bfd_vma) -1 |
5469 | || eh->plt_got.offset != (bfd_vma) -1)) | |
5470 | { | |
5471 | /* Mark the symbol as undefined, rather than as defined in | |
5472 | the .plt section. Leave the value if there were any | |
5473 | relocations where pointer equality matters (this is a clue | |
5474 | for the dynamic linker, to make function pointer | |
5475 | comparisons work between an application and shared | |
5476 | library), otherwise set it to zero. If a function is only | |
5477 | called from a binary, there is no need to slow down | |
5478 | shared libraries because of that. */ | |
5479 | sym->st_shndx = SHN_UNDEF; | |
5480 | if (!h->pointer_equality_needed) | |
5481 | sym->st_value = 0; | |
252b5132 RH |
5482 | } |
5483 | ||
aec6b87e L |
5484 | /* Don't generate dynamic GOT relocation against undefined weak |
5485 | symbol in executable. */ | |
13ae64f3 | 5486 | if (h->got.offset != (bfd_vma) -1 |
67a4f2b7 | 5487 | && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type) |
aec6b87e L |
5488 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0 |
5489 | && !local_undefweak) | |
252b5132 | 5490 | { |
947216bf | 5491 | Elf_Internal_Rela rel; |
233cc9c1 | 5492 | asection *relgot = htab->elf.srelgot; |
252b5132 RH |
5493 | |
5494 | /* This symbol has an entry in the global offset table. Set it | |
5495 | up. */ | |
5496 | ||
6de2ae4a | 5497 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
ffb2e45b | 5498 | abort (); |
252b5132 | 5499 | |
6de2ae4a L |
5500 | rel.r_offset = (htab->elf.sgot->output_section->vma |
5501 | + htab->elf.sgot->output_offset | |
dc810e39 | 5502 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 5503 | |
dd5724d5 AM |
5504 | /* If this is a static link, or it is a -Bsymbolic link and the |
5505 | symbol is defined locally or was forced to be local because | |
5506 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
5507 | The entry in the global offset table will already have been |
5508 | initialized in the relocate_section function. */ | |
710ab287 | 5509 | if (h->def_regular |
0018b0a3 L |
5510 | && h->type == STT_GNU_IFUNC) |
5511 | { | |
233cc9c1 L |
5512 | if (h->plt.offset == (bfd_vma) -1) |
5513 | { | |
5514 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
5515 | if (htab->elf.splt == NULL) | |
5516 | { | |
5517 | /* use .rel[a].iplt section to store .got relocations | |
5518 | in static executable. */ | |
5519 | relgot = htab->elf.irelplt; | |
5520 | } | |
5521 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
5522 | { | |
5523 | bfd_put_32 (output_bfd, | |
5524 | (h->root.u.def.value | |
5525 | + h->root.u.def.section->output_section->vma | |
5526 | + h->root.u.def.section->output_offset), | |
5527 | htab->elf.sgot->contents + h->got.offset); | |
5528 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
5529 | } | |
5530 | else | |
5531 | goto do_glob_dat; | |
5532 | } | |
5533 | else if (bfd_link_pic (info)) | |
710ab287 L |
5534 | { |
5535 | /* Generate R_386_GLOB_DAT. */ | |
5536 | goto do_glob_dat; | |
5537 | } | |
5538 | else | |
5539 | { | |
cd2b2c10 L |
5540 | asection *plt; |
5541 | ||
710ab287 L |
5542 | if (!h->pointer_equality_needed) |
5543 | abort (); | |
5544 | ||
5545 | /* For non-shared object, we can't use .got.plt, which | |
5546 | contains the real function addres if we need pointer | |
5547 | equality. We load the GOT entry with the PLT entry. */ | |
cd2b2c10 | 5548 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
5549 | bfd_put_32 (output_bfd, |
5550 | (plt->output_section->vma | |
5551 | + plt->output_offset + h->plt.offset), | |
6de2ae4a | 5552 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
5553 | return TRUE; |
5554 | } | |
0018b0a3 | 5555 | } |
0e1862bb | 5556 | else if (bfd_link_pic (info) |
0018b0a3 | 5557 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
dd5724d5 | 5558 | { |
6725bdbf | 5559 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 AM |
5560 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
5561 | } | |
252b5132 RH |
5562 | else |
5563 | { | |
dd5724d5 | 5564 | BFD_ASSERT((h->got.offset & 1) == 0); |
710ab287 | 5565 | do_glob_dat: |
6725bdbf | 5566 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 5567 | htab->elf.sgot->contents + h->got.offset); |
252b5132 RH |
5568 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
5569 | } | |
5570 | ||
233cc9c1 | 5571 | elf_append_rel (output_bfd, relgot, &rel); |
252b5132 RH |
5572 | } |
5573 | ||
f5385ebf | 5574 | if (h->needs_copy) |
252b5132 | 5575 | { |
947216bf | 5576 | Elf_Internal_Rela rel; |
5474d94f | 5577 | asection *s; |
252b5132 RH |
5578 | |
5579 | /* This symbol needs a copy reloc. Set it up. */ | |
5580 | ||
ffb2e45b AM |
5581 | if (h->dynindx == -1 |
5582 | || (h->root.type != bfd_link_hash_defined | |
5583 | && h->root.type != bfd_link_hash_defweak) | |
5474d94f AM |
5584 | || htab->elf.srelbss == NULL |
5585 | || htab->elf.sreldynrelro == NULL) | |
ffb2e45b | 5586 | abort (); |
252b5132 RH |
5587 | |
5588 | rel.r_offset = (h->root.u.def.value | |
5589 | + h->root.u.def.section->output_section->vma | |
5590 | + h->root.u.def.section->output_offset); | |
5591 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
5474d94f AM |
5592 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
5593 | s = htab->elf.sreldynrelro; | |
5594 | else | |
5595 | s = htab->elf.srelbss; | |
5596 | elf_append_rel (output_bfd, s, &rel); | |
252b5132 RH |
5597 | } |
5598 | ||
b34976b6 | 5599 | return TRUE; |
252b5132 RH |
5600 | } |
5601 | ||
c25bc9fc L |
5602 | /* Finish up local dynamic symbol handling. We set the contents of |
5603 | various dynamic sections here. */ | |
5604 | ||
5605 | static bfd_boolean | |
5606 | elf_i386_finish_local_dynamic_symbol (void **slot, void *inf) | |
5607 | { | |
5608 | struct elf_link_hash_entry *h | |
5609 | = (struct elf_link_hash_entry *) *slot; | |
5610 | struct bfd_link_info *info | |
23209a78 | 5611 | = (struct bfd_link_info *) inf; |
c25bc9fc L |
5612 | |
5613 | return elf_i386_finish_dynamic_symbol (info->output_bfd, info, | |
5614 | h, NULL); | |
5615 | } | |
5616 | ||
aec6b87e L |
5617 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
5618 | here since undefined weak symbol may not be dynamic and may not be | |
5619 | called for elf_i386_finish_dynamic_symbol. */ | |
5620 | ||
5621 | static bfd_boolean | |
5622 | elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
5623 | void *inf) | |
5624 | { | |
5625 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
5626 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
5627 | ||
5628 | if (h->root.type != bfd_link_hash_undefweak | |
5629 | || h->dynindx != -1) | |
5630 | return TRUE; | |
5631 | ||
5632 | return elf_i386_finish_dynamic_symbol (info->output_bfd, | |
5633 | info, h, NULL); | |
5634 | } | |
5635 | ||
38701953 AM |
5636 | /* Used to decide how to sort relocs in an optimal manner for the |
5637 | dynamic linker, before writing them out. */ | |
5638 | ||
5639 | static enum elf_reloc_type_class | |
cae1fbbb | 5640 | elf_i386_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
5641 | const asection *rel_sec ATTRIBUTE_UNUSED, |
5642 | const Elf_Internal_Rela *rela) | |
38701953 | 5643 | { |
cae1fbbb L |
5644 | bfd *abfd = info->output_bfd; |
5645 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
5646 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
cae1fbbb | 5647 | |
d9e3b590 L |
5648 | if (htab->dynsym != NULL |
5649 | && htab->dynsym->contents != NULL) | |
5650 | { | |
5651 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
5652 | dynamic symbols. */ | |
5653 | unsigned long r_symndx = ELF32_R_SYM (rela->r_info); | |
c428ce9d L |
5654 | if (r_symndx != STN_UNDEF) |
5655 | { | |
5656 | Elf_Internal_Sym sym; | |
5657 | if (!bed->s->swap_symbol_in (abfd, | |
5658 | (htab->dynsym->contents | |
5659 | + r_symndx * sizeof (Elf32_External_Sym)), | |
5660 | 0, &sym)) | |
5661 | abort (); | |
d9e3b590 | 5662 | |
c428ce9d L |
5663 | if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
5664 | return reloc_class_ifunc; | |
5665 | } | |
d9e3b590 | 5666 | } |
cae1fbbb | 5667 | |
55fd94b0 | 5668 | switch (ELF32_R_TYPE (rela->r_info)) |
38701953 | 5669 | { |
c428ce9d L |
5670 | case R_386_IRELATIVE: |
5671 | return reloc_class_ifunc; | |
38701953 AM |
5672 | case R_386_RELATIVE: |
5673 | return reloc_class_relative; | |
5674 | case R_386_JUMP_SLOT: | |
5675 | return reloc_class_plt; | |
5676 | case R_386_COPY: | |
5677 | return reloc_class_copy; | |
5678 | default: | |
5679 | return reloc_class_normal; | |
5680 | } | |
5681 | } | |
5682 | ||
252b5132 RH |
5683 | /* Finish up the dynamic sections. */ |
5684 | ||
b34976b6 | 5685 | static bfd_boolean |
55fd94b0 AM |
5686 | elf_i386_finish_dynamic_sections (bfd *output_bfd, |
5687 | struct bfd_link_info *info) | |
252b5132 | 5688 | { |
6725bdbf | 5689 | struct elf_i386_link_hash_table *htab; |
252b5132 | 5690 | bfd *dynobj; |
252b5132 | 5691 | asection *sdyn; |
25e762b9 | 5692 | const struct elf_i386_backend_data *abed; |
252b5132 | 5693 | |
6725bdbf | 5694 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
5695 | if (htab == NULL) |
5696 | return FALSE; | |
5697 | ||
ebe50bae | 5698 | dynobj = htab->elf.dynobj; |
3d4d4302 | 5699 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
25e762b9 | 5700 | abed = get_elf_i386_backend_data (output_bfd); |
252b5132 | 5701 | |
ebe50bae | 5702 | if (htab->elf.dynamic_sections_created) |
252b5132 | 5703 | { |
252b5132 RH |
5704 | Elf32_External_Dyn *dyncon, *dynconend; |
5705 | ||
6de2ae4a | 5706 | if (sdyn == NULL || htab->elf.sgot == NULL) |
ffb2e45b | 5707 | abort (); |
252b5132 RH |
5708 | |
5709 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 5710 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
252b5132 RH |
5711 | for (; dyncon < dynconend; dyncon++) |
5712 | { | |
5713 | Elf_Internal_Dyn dyn; | |
51b64d56 | 5714 | asection *s; |
252b5132 RH |
5715 | |
5716 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
5717 | ||
5718 | switch (dyn.d_tag) | |
5719 | { | |
5720 | default: | |
25e762b9 RM |
5721 | if (abed->is_vxworks |
5722 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) | |
7a2b07ff | 5723 | break; |
0ac8d2ca | 5724 | continue; |
252b5132 RH |
5725 | |
5726 | case DT_PLTGOT: | |
6de2ae4a | 5727 | s = htab->elf.sgotplt; |
8c37241b | 5728 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
6725bdbf AM |
5729 | break; |
5730 | ||
252b5132 | 5731 | case DT_JMPREL: |
6de2ae4a | 5732 | s = htab->elf.srelplt; |
6348e046 | 5733 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
252b5132 RH |
5734 | break; |
5735 | ||
5736 | case DT_PLTRELSZ: | |
6de2ae4a | 5737 | s = htab->elf.srelplt; |
eea6121a | 5738 | dyn.d_un.d_val = s->size; |
252b5132 | 5739 | break; |
252b5132 | 5740 | } |
0ac8d2ca AM |
5741 | |
5742 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
252b5132 RH |
5743 | } |
5744 | ||
5745 | /* Fill in the first entry in the procedure linkage table. */ | |
6de2ae4a | 5746 | if (htab->elf.splt && htab->elf.splt->size > 0) |
252b5132 | 5747 | { |
0e1862bb | 5748 | if (bfd_link_pic (info)) |
eac338cf | 5749 | { |
25e762b9 RM |
5750 | memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry, |
5751 | abed->plt->plt0_entry_size); | |
5752 | memset (htab->elf.splt->contents + abed->plt->plt0_entry_size, | |
5753 | abed->plt0_pad_byte, | |
5754 | abed->plt->plt_entry_size - abed->plt->plt0_entry_size); | |
eac338cf | 5755 | } |
252b5132 RH |
5756 | else |
5757 | { | |
25e762b9 RM |
5758 | memcpy (htab->elf.splt->contents, abed->plt->plt0_entry, |
5759 | abed->plt->plt0_entry_size); | |
5760 | memset (htab->elf.splt->contents + abed->plt->plt0_entry_size, | |
5761 | abed->plt0_pad_byte, | |
5762 | abed->plt->plt_entry_size - abed->plt->plt0_entry_size); | |
252b5132 | 5763 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5764 | (htab->elf.sgotplt->output_section->vma |
5765 | + htab->elf.sgotplt->output_offset | |
6725bdbf | 5766 | + 4), |
25e762b9 RM |
5767 | htab->elf.splt->contents |
5768 | + abed->plt->plt0_got1_offset); | |
252b5132 | 5769 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5770 | (htab->elf.sgotplt->output_section->vma |
5771 | + htab->elf.sgotplt->output_offset | |
6725bdbf | 5772 | + 8), |
25e762b9 RM |
5773 | htab->elf.splt->contents |
5774 | + abed->plt->plt0_got2_offset); | |
eac338cf | 5775 | |
25e762b9 | 5776 | if (abed->is_vxworks) |
eac338cf PB |
5777 | { |
5778 | Elf_Internal_Rela rel; | |
7325306f | 5779 | |
eac338cf PB |
5780 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4. |
5781 | On IA32 we use REL relocations so the addend goes in | |
5782 | the PLT directly. */ | |
6de2ae4a L |
5783 | rel.r_offset = (htab->elf.splt->output_section->vma |
5784 | + htab->elf.splt->output_offset | |
25e762b9 | 5785 | + abed->plt->plt0_got1_offset); |
7325306f | 5786 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5787 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
5788 | htab->srelplt2->contents); | |
5789 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
6de2ae4a L |
5790 | rel.r_offset = (htab->elf.splt->output_section->vma |
5791 | + htab->elf.splt->output_offset | |
25e762b9 | 5792 | + abed->plt->plt0_got2_offset); |
7325306f | 5793 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5794 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
5795 | htab->srelplt2->contents + | |
5796 | sizeof (Elf32_External_Rel)); | |
5797 | } | |
252b5132 RH |
5798 | } |
5799 | ||
5800 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
5801 | really seem like the right value. */ | |
6de2ae4a | 5802 | elf_section_data (htab->elf.splt->output_section) |
6725bdbf | 5803 | ->this_hdr.sh_entsize = 4; |
eac338cf PB |
5804 | |
5805 | /* Correct the .rel.plt.unloaded relocations. */ | |
0e1862bb | 5806 | if (abed->is_vxworks && !bfd_link_pic (info)) |
eac338cf | 5807 | { |
25e762b9 RM |
5808 | int num_plts = (htab->elf.splt->size |
5809 | / abed->plt->plt_entry_size) - 1; | |
4c9b0de6 | 5810 | unsigned char *p; |
eac338cf PB |
5811 | |
5812 | p = htab->srelplt2->contents; | |
0e1862bb | 5813 | if (bfd_link_pic (info)) |
eac338cf PB |
5814 | p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel); |
5815 | else | |
5816 | p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel); | |
5817 | ||
5818 | for (; num_plts; num_plts--) | |
5819 | { | |
5820 | Elf_Internal_Rela rel; | |
5821 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 5822 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5823 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
5824 | p += sizeof (Elf32_External_Rel); | |
5825 | ||
5826 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 5827 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf PB |
5828 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
5829 | p += sizeof (Elf32_External_Rel); | |
5830 | } | |
5831 | } | |
252b5132 RH |
5832 | } |
5833 | } | |
5834 | ||
6de2ae4a | 5835 | if (htab->elf.sgotplt) |
252b5132 | 5836 | { |
56d4289c L |
5837 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
5838 | { | |
4eca0228 | 5839 | _bfd_error_handler |
56d4289c L |
5840 | (_("discarded output section: `%A'"), htab->elf.sgotplt); |
5841 | return FALSE; | |
5842 | } | |
5843 | ||
12d0ee4a | 5844 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 5845 | if (htab->elf.sgotplt->size > 0) |
12d0ee4a AM |
5846 | { |
5847 | bfd_put_32 (output_bfd, | |
55fd94b0 | 5848 | (sdyn == NULL ? 0 |
12d0ee4a | 5849 | : sdyn->output_section->vma + sdyn->output_offset), |
6de2ae4a L |
5850 | htab->elf.sgotplt->contents); |
5851 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4); | |
5852 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8); | |
12d0ee4a | 5853 | } |
252b5132 | 5854 | |
6de2ae4a | 5855 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4; |
12d0ee4a | 5856 | } |
8c37241b | 5857 | |
e41b3a13 | 5858 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
5859 | if (htab->plt_eh_frame != NULL |
5860 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
5861 | { |
5862 | if (htab->elf.splt != NULL | |
5863 | && htab->elf.splt->size != 0 | |
5864 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
5865 | && htab->elf.splt->output_section != NULL | |
5866 | && htab->plt_eh_frame->output_section != NULL) | |
5867 | { | |
5868 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
5869 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
5870 | + htab->plt_eh_frame->output_offset | |
5871 | + PLT_FDE_START_OFFSET; | |
5872 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5873 | htab->plt_eh_frame->contents | |
5874 | + PLT_FDE_START_OFFSET); | |
5875 | } | |
5876 | if (htab->plt_eh_frame->sec_info_type | |
dbaa2011 | 5877 | == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
5878 | { |
5879 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5880 | htab->plt_eh_frame, | |
5881 | htab->plt_eh_frame->contents)) | |
5882 | return FALSE; | |
5883 | } | |
5884 | } | |
5885 | ||
6de2ae4a L |
5886 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
5887 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4; | |
8c37241b | 5888 | |
aec6b87e L |
5889 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
5890 | if (bfd_link_pie (info)) | |
5891 | bfd_hash_traverse (&info->hash->table, | |
5892 | elf_i386_pie_finish_undefweak_symbol, | |
5893 | info); | |
5894 | ||
b34976b6 | 5895 | return TRUE; |
252b5132 RH |
5896 | } |
5897 | ||
233cc9c1 L |
5898 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
5899 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
5900 | It has to be done before elf_link_sort_relocs is called so that | |
5901 | dynamic relocations are properly sorted. */ | |
5902 | ||
5903 | static bfd_boolean | |
5904 | elf_i386_output_arch_local_syms | |
5905 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
5906 | struct bfd_link_info *info, | |
5907 | void *flaginfo ATTRIBUTE_UNUSED, | |
5908 | int (*func) (void *, const char *, | |
5909 | Elf_Internal_Sym *, | |
5910 | asection *, | |
5911 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
5912 | { | |
5913 | struct elf_i386_link_hash_table *htab = elf_i386_hash_table (info); | |
5914 | if (htab == NULL) | |
5915 | return FALSE; | |
5916 | ||
5917 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
5918 | htab_traverse (htab->loc_hash_table, | |
5919 | elf_i386_finish_local_dynamic_symbol, | |
5920 | info); | |
5921 | ||
5922 | return TRUE; | |
5923 | } | |
5924 | ||
3972882e | 5925 | /* Return an array of PLT entry symbol values. */ |
4c45e5c9 | 5926 | |
3972882e L |
5927 | static bfd_vma * |
5928 | elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt, | |
5929 | asection *relplt) | |
4c45e5c9 | 5930 | { |
3972882e L |
5931 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
5932 | arelent *p; | |
5933 | long count, i; | |
5934 | bfd_vma *plt_sym_val; | |
144bed8d | 5935 | bfd_vma plt_offset; |
3972882e L |
5936 | bfd_byte *plt_contents; |
5937 | const struct elf_i386_backend_data *bed | |
5938 | = get_elf_i386_backend_data (abfd); | |
5939 | Elf_Internal_Shdr *hdr; | |
5940 | ||
5941 | /* Get the .plt section contents. */ | |
5942 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
5943 | if (plt_contents == NULL) | |
5944 | return NULL; | |
5945 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
5946 | plt_contents, 0, plt->size)) | |
5947 | { | |
5948 | bad_return: | |
5949 | free (plt_contents); | |
5950 | return NULL; | |
5951 | } | |
144bed8d | 5952 | |
3972882e L |
5953 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
5954 | if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) | |
5955 | goto bad_return; | |
144bed8d | 5956 | |
3972882e L |
5957 | hdr = &elf_section_data (relplt)->this_hdr; |
5958 | count = relplt->size / hdr->sh_entsize; | |
5959 | ||
5960 | plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count); | |
5961 | if (plt_sym_val == NULL) | |
5962 | goto bad_return; | |
cca5b8b6 | 5963 | |
35181b3e | 5964 | for (i = 0; i < count; i++) |
3972882e | 5965 | plt_sym_val[i] = -1; |
cca5b8b6 | 5966 | |
3972882e L |
5967 | plt_offset = bed->plt->plt_entry_size; |
5968 | p = relplt->relocation; | |
5969 | for (i = 0; i < count; i++, p++) | |
144bed8d | 5970 | { |
3972882e L |
5971 | long reloc_index; |
5972 | ||
6f25f223 | 5973 | /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */ |
533d0af0 | 5974 | if (p->howto == NULL) |
6f25f223 | 5975 | continue; |
533d0af0 L |
5976 | |
5977 | if (p->howto->type != R_386_JUMP_SLOT | |
5978 | && p->howto->type != R_386_IRELATIVE) | |
3972882e L |
5979 | continue; |
5980 | ||
5981 | reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset | |
5982 | + bed->plt->plt_reloc_offset)); | |
5983 | reloc_index /= sizeof (Elf32_External_Rel); | |
ec1f73bb AM |
5984 | if (reloc_index < count) |
5985 | plt_sym_val[reloc_index] = plt->vma + plt_offset; | |
5986 | ||
144bed8d | 5987 | plt_offset += bed->plt->plt_entry_size; |
fca6ae69 L |
5988 | |
5989 | /* PR binutils/18437: Skip extra relocations in the .rel.plt | |
5990 | section. */ | |
5991 | if (plt_offset >= plt->size) | |
5992 | break; | |
144bed8d L |
5993 | } |
5994 | ||
3972882e L |
5995 | free (plt_contents); |
5996 | ||
5997 | return plt_sym_val; | |
5998 | } | |
5999 | ||
6000 | /* Similar to _bfd_elf_get_synthetic_symtab. */ | |
6001 | ||
6002 | static long | |
6003 | elf_i386_get_synthetic_symtab (bfd *abfd, | |
6004 | long symcount, | |
6005 | asymbol **syms, | |
6006 | long dynsymcount, | |
6007 | asymbol **dynsyms, | |
6008 | asymbol **ret) | |
6009 | { | |
6010 | asection *plt = bfd_get_section_by_name (abfd, ".plt"); | |
6011 | return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms, | |
6012 | dynsymcount, dynsyms, ret, | |
6013 | plt, | |
6014 | elf_i386_get_plt_sym_val); | |
4c45e5c9 JJ |
6015 | } |
6016 | ||
fdc90cb4 JJ |
6017 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
6018 | ||
6019 | static bfd_boolean | |
6020 | elf_i386_hash_symbol (struct elf_link_hash_entry *h) | |
6021 | { | |
6022 | if (h->plt.offset != (bfd_vma) -1 | |
6023 | && !h->def_regular | |
6024 | && !h->pointer_equality_needed) | |
6025 | return FALSE; | |
6026 | ||
6027 | return _bfd_elf_hash_symbol (h); | |
6028 | } | |
4c45e5c9 | 6029 | |
6d00b590 | 6030 | #define TARGET_LITTLE_SYM i386_elf32_vec |
252b5132 RH |
6031 | #define TARGET_LITTLE_NAME "elf32-i386" |
6032 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 6033 | #define ELF_TARGET_ID I386_ELF_DATA |
252b5132 RH |
6034 | #define ELF_MACHINE_CODE EM_386 |
6035 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
6036 | |
6037 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 6038 | #define elf_backend_can_refcount 1 |
252b5132 RH |
6039 | #define elf_backend_want_got_plt 1 |
6040 | #define elf_backend_plt_readonly 1 | |
6041 | #define elf_backend_want_plt_sym 0 | |
6042 | #define elf_backend_got_header_size 12 | |
e41b3a13 | 6043 | #define elf_backend_plt_alignment 4 |
64f52338 | 6044 | #define elf_backend_dtrel_excludes_plt 1 |
f7483970 | 6045 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 6046 | #define elf_backend_caches_rawsize 1 |
5474d94f | 6047 | #define elf_backend_want_dynrelro 1 |
252b5132 | 6048 | |
8c29f035 AM |
6049 | /* Support RELA for objdump of prelink objects. */ |
6050 | #define elf_info_to_howto elf_i386_info_to_howto_rel | |
dd5724d5 AM |
6051 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel |
6052 | ||
13ae64f3 | 6053 | #define bfd_elf32_mkobject elf_i386_mkobject |
13ae64f3 | 6054 | |
dd5724d5 AM |
6055 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
6056 | #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create | |
6057 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup | |
13285a1b | 6058 | #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup |
3972882e | 6059 | #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab |
dd5724d5 AM |
6060 | |
6061 | #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol | |
13285a1b | 6062 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
dd5724d5 | 6063 | #define elf_backend_check_relocs elf_i386_check_relocs |
0ac8d2ca | 6064 | #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol |
6725bdbf | 6065 | #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections |
0ac8d2ca | 6066 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
6067 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
6068 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
233cc9c1 | 6069 | #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms |
dd5724d5 | 6070 | #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook |
c5fccbec DJ |
6071 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
6072 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 6073 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca AM |
6074 | #define elf_backend_relocate_section elf_i386_relocate_section |
6075 | #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections | |
67a4f2b7 | 6076 | #define elf_backend_always_size_sections elf_i386_always_size_sections |
74541ad4 AM |
6077 | #define elf_backend_omit_section_dynsym \ |
6078 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
fdc90cb4 | 6079 | #define elf_backend_hash_symbol elf_i386_hash_symbol |
aec6b87e | 6080 | #define elf_backend_fixup_symbol elf_i386_fixup_symbol |
dd5724d5 | 6081 | |
252b5132 | 6082 | #include "elf32-target.h" |
2bc3c89a AM |
6083 | |
6084 | /* FreeBSD support. */ | |
6085 | ||
6086 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6087 | #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec |
2bc3c89a AM |
6088 | #undef TARGET_LITTLE_NAME |
6089 | #define TARGET_LITTLE_NAME "elf32-i386-freebsd" | |
d1036acb L |
6090 | #undef ELF_OSABI |
6091 | #define ELF_OSABI ELFOSABI_FREEBSD | |
2bc3c89a AM |
6092 | |
6093 | /* The kernel recognizes executables as valid only if they carry a | |
6094 | "FreeBSD" label in the ELF header. So we put this label on all | |
6095 | executables and (for simplicity) also all other object files. */ | |
6096 | ||
2bc3c89a | 6097 | static void |
d8045f23 | 6098 | elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info) |
2bc3c89a | 6099 | { |
78245035 | 6100 | _bfd_elf_post_process_headers (abfd, info); |
2bc3c89a | 6101 | |
2bc3c89a | 6102 | #ifdef OLD_FREEBSD_ABI_LABEL |
cf7363b4 L |
6103 | { |
6104 | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ | |
6105 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
6106 | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); | |
6107 | } | |
caf47ea6 | 6108 | #endif |
2bc3c89a AM |
6109 | } |
6110 | ||
6111 | #undef elf_backend_post_process_headers | |
d8045f23 | 6112 | #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers |
571fe01f NC |
6113 | #undef elf32_bed |
6114 | #define elf32_bed elf32_i386_fbsd_bed | |
2bc3c89a | 6115 | |
d8045f23 NC |
6116 | #undef elf_backend_add_symbol_hook |
6117 | ||
2bc3c89a | 6118 | #include "elf32-target.h" |
eac338cf | 6119 | |
a6cc6b3b RO |
6120 | /* Solaris 2. */ |
6121 | ||
6122 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6123 | #define TARGET_LITTLE_SYM i386_elf32_sol2_vec |
a6cc6b3b RO |
6124 | #undef TARGET_LITTLE_NAME |
6125 | #define TARGET_LITTLE_NAME "elf32-i386-sol2" | |
6126 | ||
914082d1 L |
6127 | #undef elf_backend_post_process_headers |
6128 | ||
a6cc6b3b RO |
6129 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE |
6130 | objects won't be recognized. */ | |
6131 | #undef ELF_OSABI | |
6132 | ||
6133 | #undef elf32_bed | |
6134 | #define elf32_bed elf32_i386_sol2_bed | |
6135 | ||
7dc98aea RO |
6136 | /* The 32-bit static TLS arena size is rounded to the nearest 8-byte |
6137 | boundary. */ | |
84865015 | 6138 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
6139 | #define elf_backend_static_tls_alignment 8 |
6140 | ||
a6cc6b3b RO |
6141 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
6142 | ||
6143 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
6144 | File, p.63. */ | |
84865015 | 6145 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
6146 | #define elf_backend_want_plt_sym 1 |
6147 | ||
84865015 NC |
6148 | #undef elf_backend_strtab_flags |
6149 | #define elf_backend_strtab_flags SHF_STRINGS | |
6150 | ||
5522f910 NC |
6151 | /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which |
6152 | has a type >= SHT_LOOS. Returns TRUE if these fields were initialised | |
6153 | FALSE otherwise. ISECTION is the best guess matching section from the | |
6154 | input bfd IBFD, but it might be NULL. */ | |
6155 | ||
84865015 | 6156 | static bfd_boolean |
5522f910 NC |
6157 | elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
6158 | bfd *obfd ATTRIBUTE_UNUSED, | |
6159 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
6160 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
6161 | { |
6162 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
5522f910 NC |
6163 | and sh_link fields of Solaris specific section types. */ |
6164 | return FALSE; | |
84865015 | 6165 | |
5522f910 | 6166 | /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13, |
84865015 NC |
6167 | Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation: |
6168 | ||
6169 | http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc | |
6170 | ||
6171 | The following values should be set: | |
6172 | ||
6173 | Type Link Info | |
6174 | ----------------------------------------------------------------------------- | |
6175 | SHT_SUNW_ancillary The section header index of 0 | |
6176 | [0x6fffffee] the associated string table. | |
6177 | ||
6178 | SHT_SUNW_capinfo The section header index of For a dynamic object, the | |
6179 | [0x6ffffff0] the associated symbol table. section header index of | |
6180 | the associated | |
6181 | SHT_SUNW_capchain table, | |
6182 | otherwise 0. | |
6183 | ||
6184 | SHT_SUNW_symsort The section header index of 0 | |
6185 | [0x6ffffff1] the associated symbol table. | |
6186 | ||
6187 | SHT_SUNW_tlssort The section header index of 0 | |
6188 | [0x6ffffff2] the associated symbol table. | |
6189 | ||
6190 | SHT_SUNW_LDYNSYM The section header index of One greater than the | |
6191 | [0x6ffffff3] the associated string table. symbol table index of the | |
6192 | This index is the same string last local symbol, | |
6193 | table used by the SHT_DYNSYM STB_LOCAL. Since | |
6194 | section. SHT_SUNW_LDYNSYM only | |
6195 | contains local symbols, | |
6196 | sh_info is equivalent to | |
6197 | the number of symbols in | |
6198 | the table. | |
6199 | ||
6200 | SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer | |
6201 | [0x6ffffff5] the section header index of to named strings, the | |
6202 | the associated section header index of | |
6203 | SHT_SUNW_capinfo table, the associated string | |
6204 | otherwise 0. table, otherwise 0. | |
6205 | ||
6206 | SHT_SUNW_move The section header index of 0 | |
6207 | [0x6ffffffa] the associated symbol table. | |
6208 | ||
6209 | SHT_SUNW_COMDAT 0 0 | |
6210 | [0x6ffffffb] | |
6211 | ||
6212 | SHT_SUNW_syminfo The section header index of The section header index | |
6213 | [0x6ffffffc] the associated symbol table. of the associated | |
6214 | .dynamic section. | |
6215 | ||
6216 | SHT_SUNW_verdef The section header index of The number of version | |
6217 | [0x6ffffffd] the associated string table. definitions within the | |
6218 | section. | |
6219 | ||
6220 | SHT_SUNW_verneed The section header index of The number of version | |
6221 | [0x6ffffffe] the associated string table. dependencies within the | |
6222 | section. | |
6223 | ||
6224 | SHT_SUNW_versym The section header index of 0 | |
6225 | [0x6fffffff] the associated symbol table. */ | |
84865015 NC |
6226 | } |
6227 | ||
5522f910 NC |
6228 | #undef elf_backend_copy_special_section_fields |
6229 | #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields | |
84865015 | 6230 | |
a6cc6b3b RO |
6231 | #include "elf32-target.h" |
6232 | ||
bf64a951 L |
6233 | /* Intel MCU support. */ |
6234 | ||
6235 | static bfd_boolean | |
6236 | elf32_iamcu_elf_object_p (bfd *abfd) | |
6237 | { | |
6238 | /* Set the right machine number for an IAMCU elf32 file. */ | |
6239 | bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu); | |
6240 | return TRUE; | |
6241 | } | |
6242 | ||
6243 | #undef TARGET_LITTLE_SYM | |
6244 | #define TARGET_LITTLE_SYM iamcu_elf32_vec | |
6245 | #undef TARGET_LITTLE_NAME | |
6246 | #define TARGET_LITTLE_NAME "elf32-iamcu" | |
84865015 | 6247 | #undef ELF_ARCH |
bf64a951 L |
6248 | #define ELF_ARCH bfd_arch_iamcu |
6249 | ||
6250 | #undef ELF_MACHINE_CODE | |
6251 | #define ELF_MACHINE_CODE EM_IAMCU | |
6252 | ||
6253 | #undef ELF_OSABI | |
6254 | ||
6255 | #undef elf32_bed | |
6256 | #define elf32_bed elf32_iamcu_bed | |
6257 | ||
6258 | #undef elf_backend_object_p | |
6259 | #define elf_backend_object_p elf32_iamcu_elf_object_p | |
6260 | ||
6261 | #undef elf_backend_static_tls_alignment | |
6262 | ||
6263 | #undef elf_backend_want_plt_sym | |
6264 | #define elf_backend_want_plt_sym 0 | |
6265 | ||
84865015 | 6266 | #undef elf_backend_strtab_flags |
5522f910 | 6267 | #undef elf_backend_copy_special_section_fields |
84865015 | 6268 | |
bf64a951 L |
6269 | #include "elf32-target.h" |
6270 | ||
6271 | /* Restore defaults. */ | |
6272 | #undef ELF_ARCH | |
6273 | #define ELF_ARCH bfd_arch_i386 | |
6274 | #undef ELF_MACHINE_CODE | |
6275 | #define ELF_MACHINE_CODE EM_386 | |
6276 | ||
a27e4371 RM |
6277 | /* Native Client support. */ |
6278 | ||
6279 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6280 | #define TARGET_LITTLE_SYM i386_elf32_nacl_vec |
a27e4371 RM |
6281 | #undef TARGET_LITTLE_NAME |
6282 | #define TARGET_LITTLE_NAME "elf32-i386-nacl" | |
6283 | #undef elf32_bed | |
6284 | #define elf32_bed elf32_i386_nacl_bed | |
6285 | ||
6286 | #undef ELF_MAXPAGESIZE | |
6287 | #define ELF_MAXPAGESIZE 0x10000 | |
6288 | ||
6289 | /* Restore defaults. */ | |
6290 | #undef ELF_OSABI | |
6291 | #undef elf_backend_want_plt_sym | |
6292 | #define elf_backend_want_plt_sym 0 | |
6293 | #undef elf_backend_post_process_headers | |
a27e4371 RM |
6294 | #undef elf_backend_static_tls_alignment |
6295 | ||
6296 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
6297 | ||
6298 | #undef elf_backend_plt_alignment | |
6299 | #define elf_backend_plt_alignment 5 | |
6300 | #define NACL_PLT_ENTRY_SIZE 64 | |
6301 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
6302 | ||
6303 | static const bfd_byte elf_i386_nacl_plt0_entry[] = | |
6304 | { | |
6305 | 0xff, 0x35, /* pushl contents of address */ | |
6306 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
6307 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
6308 | 0, 0, 0, 0, /* replaced with address of .got + 8. */ | |
6309 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
6310 | 0xff, 0xe1 /* jmp *%ecx */ | |
6311 | }; | |
6312 | ||
6313 | static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6314 | { | |
6315 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
6316 | 0, 0, 0, 0, /* replaced with GOT slot address. */ | |
6317 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
6318 | 0xff, 0xe1, /* jmp *%ecx */ | |
6319 | ||
6320 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6321 | 0x90, | |
6322 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6323 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6324 | ||
6325 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6326 | 0x68, /* pushl immediate */ | |
6327 | 0, 0, 0, 0, /* replaced with reloc offset. */ | |
6328 | 0xe9, /* jmp relative */ | |
6329 | 0, 0, 0, 0, /* replaced with offset to .plt. */ | |
6330 | ||
6331 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6332 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6333 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6334 | 0x90, 0x90 | |
6335 | }; | |
6336 | ||
6337 | static const bfd_byte | |
6338 | elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] = | |
6339 | { | |
6340 | 0xff, 0x73, 0x04, /* pushl 4(%ebx) */ | |
6341 | 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */ | |
6342 | 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */ | |
6343 | 0xff, 0xe1, /* jmp *%ecx */ | |
caa0075c RM |
6344 | |
6345 | /* This is expected to be the same size as elf_i386_nacl_plt0_entry, | |
6346 | so pad to that size with nop instructions. */ | |
6347 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 | |
a27e4371 RM |
6348 | }; |
6349 | ||
6350 | static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6351 | { | |
6352 | 0x8b, 0x8b, /* movl offset(%ebx), %ecx */ | |
6353 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
6354 | 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */ | |
6355 | 0xff, 0xe1, /* jmp *%ecx */ | |
6356 | ||
6357 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6358 | 0x90, | |
6359 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6360 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6361 | ||
6362 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6363 | 0x68, /* pushl immediate */ | |
6364 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
6365 | 0xe9, /* jmp relative */ | |
6366 | 0, 0, 0, 0, /* replaced with offset to start of .plt. */ | |
6367 | ||
6368 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6369 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6370 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6371 | 0x90, 0x90 | |
6372 | }; | |
6373 | ||
6374 | static const bfd_byte elf_i386_nacl_eh_frame_plt[] = | |
6375 | { | |
6376 | #if (PLT_CIE_LENGTH != 20 \ | |
6377 | || PLT_FDE_LENGTH != 36 \ | |
6378 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
6379 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
6380 | # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!" | |
6381 | #endif | |
6382 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
6383 | 0, 0, 0, 0, /* CIE ID */ | |
6384 | 1, /* CIE version */ | |
6385 | 'z', 'R', 0, /* Augmentation string */ | |
6386 | 1, /* Code alignment factor */ | |
6387 | 0x7c, /* Data alignment factor: -4 */ | |
6388 | 8, /* Return address column */ | |
6389 | 1, /* Augmentation size */ | |
6390 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
6391 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
6392 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
6393 | DW_CFA_nop, DW_CFA_nop, | |
6394 | ||
6395 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
6396 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
6397 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
6398 | 0, 0, 0, 0, /* .plt size goes here */ | |
6399 | 0, /* Augmentation size */ | |
6400 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
6401 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
6402 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
6403 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
6404 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
6405 | 13, /* Block length */ | |
6406 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
6407 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
6408 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
6409 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, | |
6410 | DW_CFA_nop, DW_CFA_nop | |
6411 | }; | |
6412 | ||
6413 | static const struct elf_i386_plt_layout elf_i386_nacl_plt = | |
6414 | { | |
6415 | elf_i386_nacl_plt0_entry, /* plt0_entry */ | |
6416 | sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */ | |
6417 | 2, /* plt0_got1_offset */ | |
6418 | 8, /* plt0_got2_offset */ | |
6419 | elf_i386_nacl_plt_entry, /* plt_entry */ | |
6420 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
6421 | 2, /* plt_got_offset */ | |
6422 | 33, /* plt_reloc_offset */ | |
6423 | 38, /* plt_plt_offset */ | |
6424 | 32, /* plt_lazy_offset */ | |
6425 | elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */ | |
6426 | elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */ | |
6427 | elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */ | |
6428 | sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */ | |
6429 | }; | |
6430 | ||
6431 | static const struct elf_i386_backend_data elf_i386_nacl_arch_bed = | |
6432 | { | |
6433 | &elf_i386_nacl_plt, /* plt */ | |
6434 | 0x90, /* plt0_pad_byte: nop insn */ | |
6435 | 0, /* is_vxworks */ | |
6436 | }; | |
6437 | ||
64b384e1 RM |
6438 | static bfd_boolean |
6439 | elf32_i386_nacl_elf_object_p (bfd *abfd) | |
6440 | { | |
6441 | /* Set the right machine number for a NaCl i386 ELF32 file. */ | |
6442 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl); | |
6443 | return TRUE; | |
6444 | } | |
6445 | ||
a27e4371 RM |
6446 | #undef elf_backend_arch_data |
6447 | #define elf_backend_arch_data &elf_i386_nacl_arch_bed | |
6448 | ||
64b384e1 RM |
6449 | #undef elf_backend_object_p |
6450 | #define elf_backend_object_p elf32_i386_nacl_elf_object_p | |
5a68afcf RM |
6451 | #undef elf_backend_modify_segment_map |
6452 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
6453 | #undef elf_backend_modify_program_headers | |
6454 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
6455 | #undef elf_backend_final_write_processing |
6456 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 6457 | |
a27e4371 RM |
6458 | #include "elf32-target.h" |
6459 | ||
5a68afcf | 6460 | /* Restore defaults. */ |
64b384e1 | 6461 | #undef elf_backend_object_p |
5a68afcf RM |
6462 | #undef elf_backend_modify_segment_map |
6463 | #undef elf_backend_modify_program_headers | |
887badb3 | 6464 | #undef elf_backend_final_write_processing |
5a68afcf | 6465 | |
eac338cf PB |
6466 | /* VxWorks support. */ |
6467 | ||
6468 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6469 | #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec |
eac338cf PB |
6470 | #undef TARGET_LITTLE_NAME |
6471 | #define TARGET_LITTLE_NAME "elf32-i386-vxworks" | |
d1036acb | 6472 | #undef ELF_OSABI |
a27e4371 RM |
6473 | #undef elf_backend_plt_alignment |
6474 | #define elf_backend_plt_alignment 4 | |
eac338cf | 6475 | |
23209a78 RM |
6476 | static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed = |
6477 | { | |
25e762b9 | 6478 | &elf_i386_plt, /* plt */ |
23209a78 RM |
6479 | 0x90, /* plt0_pad_byte */ |
6480 | 1, /* is_vxworks */ | |
6481 | }; | |
eac338cf | 6482 | |
23209a78 RM |
6483 | #undef elf_backend_arch_data |
6484 | #define elf_backend_arch_data &elf_i386_vxworks_arch_bed | |
eac338cf | 6485 | |
13285a1b | 6486 | #undef elf_backend_relocs_compatible |
eac338cf PB |
6487 | #undef elf_backend_add_symbol_hook |
6488 | #define elf_backend_add_symbol_hook \ | |
6489 | elf_vxworks_add_symbol_hook | |
6490 | #undef elf_backend_link_output_symbol_hook | |
6491 | #define elf_backend_link_output_symbol_hook \ | |
9c72ff84 | 6492 | elf_vxworks_link_output_symbol_hook |
eac338cf PB |
6493 | #undef elf_backend_emit_relocs |
6494 | #define elf_backend_emit_relocs elf_vxworks_emit_relocs | |
6495 | #undef elf_backend_final_write_processing | |
6496 | #define elf_backend_final_write_processing \ | |
6497 | elf_vxworks_final_write_processing | |
7dc98aea | 6498 | #undef elf_backend_static_tls_alignment |
eac338cf PB |
6499 | |
6500 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so | |
6501 | define it. */ | |
6502 | #undef elf_backend_want_plt_sym | |
6503 | #define elf_backend_want_plt_sym 1 | |
6504 | ||
6505 | #undef elf32_bed | |
6506 | #define elf32_bed elf32_i386_vxworks_bed | |
6507 | ||
6508 | #include "elf32-target.h" |