Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Intel 80386/80486-specific support for 32-bit ELF |
2571583a | 2 | Copyright (C) 1993-2017 Free Software Foundation, Inc. |
252b5132 | 3 | |
571fe01f | 4 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 5 | |
571fe01f NC |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 8 | the Free Software Foundation; either version 3 of the License, or |
571fe01f | 9 | (at your option) any later version. |
252b5132 | 10 | |
571fe01f NC |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
252b5132 | 15 | |
571fe01f NC |
16 | You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
19 | MA 02110-1301, USA. */ | |
252b5132 | 20 | |
0afcef53 | 21 | #include "elfxx-x86.h" |
5a68afcf | 22 | #include "elf-nacl.h" |
eac338cf | 23 | #include "elf-vxworks.h" |
e41b3a13 | 24 | #include "dwarf2.h" |
02a86693 | 25 | #include "opcode/i386.h" |
252b5132 | 26 | |
55fd94b0 AM |
27 | /* 386 uses REL relocations instead of RELA. */ |
28 | #define USE_REL 1 | |
252b5132 RH |
29 | |
30 | #include "elf/i386.h" | |
31 | ||
32 | static reloc_howto_type elf_howto_table[]= | |
33 | { | |
6346d5ca | 34 | HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont, |
1b452ec6 | 35 | bfd_elf_generic_reloc, "R_386_NONE", |
b34976b6 AM |
36 | TRUE, 0x00000000, 0x00000000, FALSE), |
37 | HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 38 | bfd_elf_generic_reloc, "R_386_32", |
b34976b6 AM |
39 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
40 | HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 41 | bfd_elf_generic_reloc, "R_386_PC32", |
b34976b6 AM |
42 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
43 | HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 44 | bfd_elf_generic_reloc, "R_386_GOT32", |
b34976b6 AM |
45 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
46 | HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 47 | bfd_elf_generic_reloc, "R_386_PLT32", |
b34976b6 AM |
48 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
49 | HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 50 | bfd_elf_generic_reloc, "R_386_COPY", |
b34976b6 AM |
51 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
52 | HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 53 | bfd_elf_generic_reloc, "R_386_GLOB_DAT", |
b34976b6 AM |
54 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
55 | HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 56 | bfd_elf_generic_reloc, "R_386_JUMP_SLOT", |
b34976b6 AM |
57 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
58 | HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 59 | bfd_elf_generic_reloc, "R_386_RELATIVE", |
b34976b6 AM |
60 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
61 | HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 62 | bfd_elf_generic_reloc, "R_386_GOTOFF", |
b34976b6 AM |
63 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
64 | HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 65 | bfd_elf_generic_reloc, "R_386_GOTPC", |
b34976b6 | 66 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
1b452ec6 | 67 | |
dc47f327 AM |
68 | /* We have a gap in the reloc numbers here. |
69 | R_386_standard counts the number up to this point, and | |
70 | R_386_ext_offset is the value to subtract from a reloc type of | |
71 | R_386_16 thru R_386_PC8 to form an index into this table. */ | |
55fd94b0 AM |
72 | #define R_386_standard (R_386_GOTPC + 1) |
73 | #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard) | |
1b452ec6 | 74 | |
37e55690 | 75 | /* These relocs are a GNU extension. */ |
b34976b6 | 76 | HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
37e55690 | 77 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF", |
b34976b6 AM |
78 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
79 | HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 80 | bfd_elf_generic_reloc, "R_386_TLS_IE", |
b34976b6 AM |
81 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
82 | HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 83 | bfd_elf_generic_reloc, "R_386_TLS_GOTIE", |
b34976b6 AM |
84 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
85 | HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 86 | bfd_elf_generic_reloc, "R_386_TLS_LE", |
b34976b6 AM |
87 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
88 | HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 89 | bfd_elf_generic_reloc, "R_386_TLS_GD", |
b34976b6 AM |
90 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
91 | HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 92 | bfd_elf_generic_reloc, "R_386_TLS_LDM", |
b34976b6 AM |
93 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
94 | HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 95 | bfd_elf_generic_reloc, "R_386_16", |
b34976b6 | 96 | TRUE, 0xffff, 0xffff, FALSE), |
b0360d8c | 97 | HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
1b452ec6 | 98 | bfd_elf_generic_reloc, "R_386_PC16", |
b34976b6 AM |
99 | TRUE, 0xffff, 0xffff, TRUE), |
100 | HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 101 | bfd_elf_generic_reloc, "R_386_8", |
b34976b6 AM |
102 | TRUE, 0xff, 0xff, FALSE), |
103 | HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
1b452ec6 | 104 | bfd_elf_generic_reloc, "R_386_PC8", |
b34976b6 | 105 | TRUE, 0xff, 0xff, TRUE), |
dc47f327 | 106 | |
55fd94b0 AM |
107 | #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset) |
108 | #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext) | |
13ae64f3 | 109 | /* These are common with Solaris TLS implementation. */ |
b34976b6 | 110 | HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
13ae64f3 | 111 | bfd_elf_generic_reloc, "R_386_TLS_LDO_32", |
b34976b6 AM |
112 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
113 | HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 114 | bfd_elf_generic_reloc, "R_386_TLS_IE_32", |
b34976b6 AM |
115 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
116 | HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 117 | bfd_elf_generic_reloc, "R_386_TLS_LE_32", |
b34976b6 AM |
118 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
119 | HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 120 | bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32", |
b34976b6 AM |
121 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
122 | HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 123 | bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32", |
b34976b6 AM |
124 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
125 | HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 126 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF32", |
b34976b6 | 127 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
1788fc08 L |
128 | HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, |
129 | bfd_elf_generic_reloc, "R_386_SIZE32", | |
130 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
67a4f2b7 AO |
131 | HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
132 | bfd_elf_generic_reloc, "R_386_TLS_GOTDESC", | |
133 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
134 | HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
135 | bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL", | |
136 | FALSE, 0, 0, FALSE), | |
137 | HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
138 | bfd_elf_generic_reloc, "R_386_TLS_DESC", | |
139 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
cbe950e9 L |
140 | HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
141 | bfd_elf_generic_reloc, "R_386_IRELATIVE", | |
142 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
02a86693 L |
143 | HOWTO(R_386_GOT32X, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
144 | bfd_elf_generic_reloc, "R_386_GOT32X", | |
145 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
13ae64f3 JJ |
146 | |
147 | /* Another gap. */ | |
02a86693 | 148 | #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset) |
c74be520 | 149 | #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2) |
252b5132 RH |
150 | |
151 | /* GNU extension to record C++ vtable hierarchy. */ | |
252b5132 RH |
152 | HOWTO (R_386_GNU_VTINHERIT, /* type */ |
153 | 0, /* rightshift */ | |
154 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
155 | 0, /* bitsize */ | |
b34976b6 | 156 | FALSE, /* pc_relative */ |
252b5132 RH |
157 | 0, /* bitpos */ |
158 | complain_overflow_dont, /* complain_on_overflow */ | |
159 | NULL, /* special_function */ | |
160 | "R_386_GNU_VTINHERIT", /* name */ | |
b34976b6 | 161 | FALSE, /* partial_inplace */ |
252b5132 RH |
162 | 0, /* src_mask */ |
163 | 0, /* dst_mask */ | |
b34976b6 | 164 | FALSE), /* pcrel_offset */ |
252b5132 RH |
165 | |
166 | /* GNU extension to record C++ vtable member usage. */ | |
252b5132 RH |
167 | HOWTO (R_386_GNU_VTENTRY, /* type */ |
168 | 0, /* rightshift */ | |
169 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
170 | 0, /* bitsize */ | |
b34976b6 | 171 | FALSE, /* pc_relative */ |
252b5132 RH |
172 | 0, /* bitpos */ |
173 | complain_overflow_dont, /* complain_on_overflow */ | |
174 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
175 | "R_386_GNU_VTENTRY", /* name */ | |
b34976b6 | 176 | FALSE, /* partial_inplace */ |
252b5132 RH |
177 | 0, /* src_mask */ |
178 | 0, /* dst_mask */ | |
b34976b6 | 179 | FALSE) /* pcrel_offset */ |
dc47f327 | 180 | |
55fd94b0 | 181 | #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset) |
dc47f327 AM |
182 | |
183 | }; | |
184 | ||
daf1c414 L |
185 | #define X86_PCREL_TYPE_P(TYPE) ((TYPE) == R_386_PC32) |
186 | ||
252b5132 | 187 | #ifdef DEBUG_GEN_RELOC |
55fd94b0 AM |
188 | #define TRACE(str) \ |
189 | fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str) | |
252b5132 RH |
190 | #else |
191 | #define TRACE(str) | |
192 | #endif | |
193 | ||
194 | static reloc_howto_type * | |
55fd94b0 AM |
195 | elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
196 | bfd_reloc_code_real_type code) | |
252b5132 RH |
197 | { |
198 | switch (code) | |
199 | { | |
200 | case BFD_RELOC_NONE: | |
201 | TRACE ("BFD_RELOC_NONE"); | |
55fd94b0 | 202 | return &elf_howto_table[R_386_NONE]; |
252b5132 RH |
203 | |
204 | case BFD_RELOC_32: | |
205 | TRACE ("BFD_RELOC_32"); | |
55fd94b0 | 206 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
207 | |
208 | case BFD_RELOC_CTOR: | |
209 | TRACE ("BFD_RELOC_CTOR"); | |
55fd94b0 | 210 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
211 | |
212 | case BFD_RELOC_32_PCREL: | |
213 | TRACE ("BFD_RELOC_PC32"); | |
55fd94b0 | 214 | return &elf_howto_table[R_386_PC32]; |
252b5132 RH |
215 | |
216 | case BFD_RELOC_386_GOT32: | |
217 | TRACE ("BFD_RELOC_386_GOT32"); | |
55fd94b0 | 218 | return &elf_howto_table[R_386_GOT32]; |
252b5132 RH |
219 | |
220 | case BFD_RELOC_386_PLT32: | |
221 | TRACE ("BFD_RELOC_386_PLT32"); | |
55fd94b0 | 222 | return &elf_howto_table[R_386_PLT32]; |
252b5132 RH |
223 | |
224 | case BFD_RELOC_386_COPY: | |
225 | TRACE ("BFD_RELOC_386_COPY"); | |
55fd94b0 | 226 | return &elf_howto_table[R_386_COPY]; |
252b5132 RH |
227 | |
228 | case BFD_RELOC_386_GLOB_DAT: | |
229 | TRACE ("BFD_RELOC_386_GLOB_DAT"); | |
55fd94b0 | 230 | return &elf_howto_table[R_386_GLOB_DAT]; |
252b5132 RH |
231 | |
232 | case BFD_RELOC_386_JUMP_SLOT: | |
233 | TRACE ("BFD_RELOC_386_JUMP_SLOT"); | |
55fd94b0 | 234 | return &elf_howto_table[R_386_JUMP_SLOT]; |
252b5132 RH |
235 | |
236 | case BFD_RELOC_386_RELATIVE: | |
237 | TRACE ("BFD_RELOC_386_RELATIVE"); | |
55fd94b0 | 238 | return &elf_howto_table[R_386_RELATIVE]; |
252b5132 RH |
239 | |
240 | case BFD_RELOC_386_GOTOFF: | |
241 | TRACE ("BFD_RELOC_386_GOTOFF"); | |
55fd94b0 | 242 | return &elf_howto_table[R_386_GOTOFF]; |
252b5132 RH |
243 | |
244 | case BFD_RELOC_386_GOTPC: | |
245 | TRACE ("BFD_RELOC_386_GOTPC"); | |
55fd94b0 | 246 | return &elf_howto_table[R_386_GOTPC]; |
252b5132 | 247 | |
37e55690 JJ |
248 | /* These relocs are a GNU extension. */ |
249 | case BFD_RELOC_386_TLS_TPOFF: | |
250 | TRACE ("BFD_RELOC_386_TLS_TPOFF"); | |
55fd94b0 | 251 | return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset]; |
37e55690 JJ |
252 | |
253 | case BFD_RELOC_386_TLS_IE: | |
254 | TRACE ("BFD_RELOC_386_TLS_IE"); | |
55fd94b0 | 255 | return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset]; |
37e55690 JJ |
256 | |
257 | case BFD_RELOC_386_TLS_GOTIE: | |
258 | TRACE ("BFD_RELOC_386_TLS_GOTIE"); | |
55fd94b0 | 259 | return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset]; |
37e55690 | 260 | |
13ae64f3 JJ |
261 | case BFD_RELOC_386_TLS_LE: |
262 | TRACE ("BFD_RELOC_386_TLS_LE"); | |
55fd94b0 | 263 | return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset]; |
13ae64f3 JJ |
264 | |
265 | case BFD_RELOC_386_TLS_GD: | |
266 | TRACE ("BFD_RELOC_386_TLS_GD"); | |
55fd94b0 | 267 | return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset]; |
13ae64f3 JJ |
268 | |
269 | case BFD_RELOC_386_TLS_LDM: | |
270 | TRACE ("BFD_RELOC_386_TLS_LDM"); | |
55fd94b0 | 271 | return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset]; |
13ae64f3 | 272 | |
252b5132 RH |
273 | case BFD_RELOC_16: |
274 | TRACE ("BFD_RELOC_16"); | |
55fd94b0 | 275 | return &elf_howto_table[R_386_16 - R_386_ext_offset]; |
252b5132 RH |
276 | |
277 | case BFD_RELOC_16_PCREL: | |
278 | TRACE ("BFD_RELOC_16_PCREL"); | |
55fd94b0 | 279 | return &elf_howto_table[R_386_PC16 - R_386_ext_offset]; |
252b5132 RH |
280 | |
281 | case BFD_RELOC_8: | |
282 | TRACE ("BFD_RELOC_8"); | |
55fd94b0 | 283 | return &elf_howto_table[R_386_8 - R_386_ext_offset]; |
252b5132 RH |
284 | |
285 | case BFD_RELOC_8_PCREL: | |
286 | TRACE ("BFD_RELOC_8_PCREL"); | |
55fd94b0 | 287 | return &elf_howto_table[R_386_PC8 - R_386_ext_offset]; |
252b5132 | 288 | |
13ae64f3 JJ |
289 | /* Common with Sun TLS implementation. */ |
290 | case BFD_RELOC_386_TLS_LDO_32: | |
291 | TRACE ("BFD_RELOC_386_TLS_LDO_32"); | |
55fd94b0 | 292 | return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset]; |
13ae64f3 JJ |
293 | |
294 | case BFD_RELOC_386_TLS_IE_32: | |
295 | TRACE ("BFD_RELOC_386_TLS_IE_32"); | |
55fd94b0 | 296 | return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
297 | |
298 | case BFD_RELOC_386_TLS_LE_32: | |
299 | TRACE ("BFD_RELOC_386_TLS_LE_32"); | |
55fd94b0 | 300 | return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
301 | |
302 | case BFD_RELOC_386_TLS_DTPMOD32: | |
303 | TRACE ("BFD_RELOC_386_TLS_DTPMOD32"); | |
55fd94b0 | 304 | return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset]; |
13ae64f3 JJ |
305 | |
306 | case BFD_RELOC_386_TLS_DTPOFF32: | |
307 | TRACE ("BFD_RELOC_386_TLS_DTPOFF32"); | |
55fd94b0 | 308 | return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset]; |
13ae64f3 JJ |
309 | |
310 | case BFD_RELOC_386_TLS_TPOFF32: | |
311 | TRACE ("BFD_RELOC_386_TLS_TPOFF32"); | |
55fd94b0 | 312 | return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset]; |
13ae64f3 | 313 | |
1788fc08 L |
314 | case BFD_RELOC_SIZE32: |
315 | TRACE ("BFD_RELOC_SIZE32"); | |
316 | return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset]; | |
317 | ||
67a4f2b7 AO |
318 | case BFD_RELOC_386_TLS_GOTDESC: |
319 | TRACE ("BFD_RELOC_386_TLS_GOTDESC"); | |
320 | return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset]; | |
321 | ||
322 | case BFD_RELOC_386_TLS_DESC_CALL: | |
323 | TRACE ("BFD_RELOC_386_TLS_DESC_CALL"); | |
324 | return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset]; | |
325 | ||
326 | case BFD_RELOC_386_TLS_DESC: | |
327 | TRACE ("BFD_RELOC_386_TLS_DESC"); | |
328 | return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset]; | |
329 | ||
cbe950e9 L |
330 | case BFD_RELOC_386_IRELATIVE: |
331 | TRACE ("BFD_RELOC_386_IRELATIVE"); | |
2a750708 | 332 | return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset]; |
cbe950e9 | 333 | |
02a86693 L |
334 | case BFD_RELOC_386_GOT32X: |
335 | TRACE ("BFD_RELOC_386_GOT32X"); | |
336 | return &elf_howto_table[R_386_GOT32X - R_386_tls_offset]; | |
337 | ||
252b5132 RH |
338 | case BFD_RELOC_VTABLE_INHERIT: |
339 | TRACE ("BFD_RELOC_VTABLE_INHERIT"); | |
55fd94b0 | 340 | return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset]; |
252b5132 RH |
341 | |
342 | case BFD_RELOC_VTABLE_ENTRY: | |
343 | TRACE ("BFD_RELOC_VTABLE_ENTRY"); | |
55fd94b0 | 344 | return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset]; |
252b5132 RH |
345 | |
346 | default: | |
347 | break; | |
348 | } | |
349 | ||
350 | TRACE ("Unknown"); | |
351 | return 0; | |
352 | } | |
353 | ||
157090f7 AM |
354 | static reloc_howto_type * |
355 | elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
356 | const char *r_name) | |
357 | { | |
358 | unsigned int i; | |
359 | ||
360 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) | |
361 | if (elf_howto_table[i].name != NULL | |
362 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) | |
363 | return &elf_howto_table[i]; | |
364 | ||
365 | return NULL; | |
366 | } | |
367 | ||
142411ca L |
368 | static reloc_howto_type * |
369 | elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type) | |
252b5132 | 370 | { |
dc47f327 AM |
371 | unsigned int indx; |
372 | ||
373 | if ((indx = r_type) >= R_386_standard | |
374 | && ((indx = r_type - R_386_ext_offset) - R_386_standard | |
375 | >= R_386_ext - R_386_standard) | |
13ae64f3 | 376 | && ((indx = r_type - R_386_tls_offset) - R_386_ext |
c74be520 L |
377 | >= R_386_ext2 - R_386_ext) |
378 | && ((indx = r_type - R_386_vt_offset) - R_386_ext2 | |
379 | >= R_386_vt - R_386_ext2)) | |
252b5132 | 380 | { |
695344c0 | 381 | /* xgettext:c-format */ |
4eca0228 AM |
382 | _bfd_error_handler (_("%B: invalid relocation type %d"), |
383 | abfd, (int) r_type); | |
55fd94b0 | 384 | indx = R_386_NONE; |
252b5132 | 385 | } |
06614111 NC |
386 | /* PR 17512: file: 0f67f69d. */ |
387 | if (elf_howto_table [indx].type != r_type) | |
388 | return NULL; | |
142411ca L |
389 | return &elf_howto_table[indx]; |
390 | } | |
391 | ||
392 | static void | |
393 | elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, | |
394 | arelent *cache_ptr, | |
395 | Elf_Internal_Rela *dst) | |
396 | { | |
397 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); | |
398 | cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type); | |
252b5132 RH |
399 | } |
400 | ||
401 | /* Return whether a symbol name implies a local label. The UnixWare | |
402 | 2.1 cc generates temporary symbols that start with .X, so we | |
403 | recognize them here. FIXME: do other SVR4 compilers also use .X?. | |
404 | If so, we should move the .X recognition into | |
405 | _bfd_elf_is_local_label_name. */ | |
406 | ||
b34976b6 | 407 | static bfd_boolean |
55fd94b0 | 408 | elf_i386_is_local_label_name (bfd *abfd, const char *name) |
252b5132 RH |
409 | { |
410 | if (name[0] == '.' && name[1] == 'X') | |
b34976b6 | 411 | return TRUE; |
252b5132 RH |
412 | |
413 | return _bfd_elf_is_local_label_name (abfd, name); | |
414 | } | |
415 | \f | |
38701953 | 416 | /* Support for core dump NOTE sections. */ |
61adc1a4 | 417 | |
b34976b6 | 418 | static bfd_boolean |
55fd94b0 | 419 | elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
38701953 AM |
420 | { |
421 | int offset; | |
eea6121a | 422 | size_t size; |
38701953 | 423 | |
61adc1a4 | 424 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 425 | { |
61adc1a4 NC |
426 | int pr_version = bfd_get_32 (abfd, note->descdata); |
427 | ||
428 | if (pr_version != 1) | |
429 | return FALSE; | |
430 | ||
431 | /* pr_cursig */ | |
228e534f | 432 | elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20); |
61adc1a4 NC |
433 | |
434 | /* pr_pid */ | |
228e534f | 435 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
61adc1a4 NC |
436 | |
437 | /* pr_reg */ | |
438 | offset = 28; | |
eea6121a | 439 | size = bfd_get_32 (abfd, note->descdata + 8); |
61adc1a4 NC |
440 | } |
441 | else | |
442 | { | |
443 | switch (note->descsz) | |
444 | { | |
445 | default: | |
446 | return FALSE; | |
38701953 | 447 | |
61adc1a4 NC |
448 | case 144: /* Linux/i386 */ |
449 | /* pr_cursig */ | |
228e534f | 450 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
38701953 | 451 | |
61adc1a4 | 452 | /* pr_pid */ |
228e534f | 453 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
38701953 | 454 | |
61adc1a4 NC |
455 | /* pr_reg */ |
456 | offset = 72; | |
eea6121a | 457 | size = 68; |
38701953 | 458 | |
61adc1a4 NC |
459 | break; |
460 | } | |
38701953 AM |
461 | } |
462 | ||
463 | /* Make a ".reg/999" section. */ | |
464 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 465 | size, note->descpos + offset); |
38701953 AM |
466 | } |
467 | ||
b34976b6 | 468 | static bfd_boolean |
55fd94b0 | 469 | elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
38701953 | 470 | { |
61adc1a4 | 471 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 472 | { |
61adc1a4 NC |
473 | int pr_version = bfd_get_32 (abfd, note->descdata); |
474 | ||
475 | if (pr_version != 1) | |
b34976b6 | 476 | return FALSE; |
38701953 | 477 | |
228e534f | 478 | elf_tdata (abfd)->core->program |
61adc1a4 | 479 | = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17); |
228e534f | 480 | elf_tdata (abfd)->core->command |
61adc1a4 NC |
481 | = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81); |
482 | } | |
483 | else | |
484 | { | |
485 | switch (note->descsz) | |
486 | { | |
487 | default: | |
488 | return FALSE; | |
489 | ||
490 | case 124: /* Linux/i386 elf_prpsinfo. */ | |
228e534f | 491 | elf_tdata (abfd)->core->pid |
261b8d08 | 492 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 493 | elf_tdata (abfd)->core->program |
61adc1a4 | 494 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 495 | elf_tdata (abfd)->core->command |
61adc1a4 NC |
496 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
497 | } | |
38701953 AM |
498 | } |
499 | ||
500 | /* Note that for some reason, a spurious space is tacked | |
501 | onto the end of the args in some (at least one anyway) | |
502 | implementations, so strip it off if it exists. */ | |
38701953 | 503 | { |
228e534f | 504 | char *command = elf_tdata (abfd)->core->command; |
38701953 AM |
505 | int n = strlen (command); |
506 | ||
507 | if (0 < n && command[n - 1] == ' ') | |
508 | command[n - 1] = '\0'; | |
509 | } | |
510 | ||
b34976b6 | 511 | return TRUE; |
38701953 AM |
512 | } |
513 | \f | |
514 | /* Functions for the i386 ELF linker. | |
515 | ||
516 | In order to gain some understanding of code in this file without | |
517 | knowing all the intricate details of the linker, note the | |
518 | following: | |
519 | ||
520 | Functions named elf_i386_* are called by external routines, other | |
521 | functions are only called locally. elf_i386_* functions appear | |
522 | in this file more or less in the order in which they are called | |
523 | from external routines. eg. elf_i386_check_relocs is called | |
524 | early in the link process, elf_i386_finish_dynamic_sections is | |
525 | one of the last functions. */ | |
526 | ||
f604c2a2 | 527 | /* The size in bytes of an entry in the lazy procedure linkage table. */ |
252b5132 | 528 | |
f604c2a2 | 529 | #define LAZY_PLT_ENTRY_SIZE 16 |
252b5132 | 530 | |
f604c2a2 L |
531 | /* The size in bytes of an entry in the non-lazy procedure linkage |
532 | table. */ | |
252b5132 | 533 | |
f604c2a2 L |
534 | #define NON_LAZY_PLT_ENTRY_SIZE 8 |
535 | ||
536 | /* The first entry in an absolute lazy procedure linkage table looks | |
537 | like this. See the SVR4 ABI i386 supplement to see how this works. | |
538 | Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */ | |
539 | ||
540 | static const bfd_byte elf_i386_lazy_plt0_entry[12] = | |
252b5132 RH |
541 | { |
542 | 0xff, 0x35, /* pushl contents of address */ | |
543 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
544 | 0xff, 0x25, /* jmp indirect */ | |
eac338cf | 545 | 0, 0, 0, 0 /* replaced with address of .got + 8. */ |
252b5132 RH |
546 | }; |
547 | ||
f604c2a2 L |
548 | /* Subsequent entries in an absolute lazy procedure linkage table look |
549 | like this. */ | |
252b5132 | 550 | |
f604c2a2 | 551 | static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
252b5132 RH |
552 | { |
553 | 0xff, 0x25, /* jmp indirect */ | |
554 | 0, 0, 0, 0, /* replaced with address of this symbol in .got. */ | |
555 | 0x68, /* pushl immediate */ | |
556 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
557 | 0xe9, /* jmp relative */ | |
558 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
559 | }; | |
560 | ||
f604c2a2 L |
561 | /* The first entry in a PIC lazy procedure linkage table look like |
562 | this. Will be padded to LAZY_PLT_ENTRY_SIZE with | |
563 | lazy_plt->plt0_pad_byte. */ | |
252b5132 | 564 | |
f604c2a2 | 565 | static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] = |
252b5132 RH |
566 | { |
567 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
eac338cf | 568 | 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */ |
252b5132 RH |
569 | }; |
570 | ||
f604c2a2 L |
571 | /* Subsequent entries in a PIC lazy procedure linkage table look like |
572 | this. */ | |
252b5132 | 573 | |
f604c2a2 | 574 | static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
252b5132 RH |
575 | { |
576 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
577 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
578 | 0x68, /* pushl immediate */ | |
579 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
580 | 0xe9, /* jmp relative */ | |
581 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
582 | }; | |
583 | ||
f604c2a2 | 584 | /* Entries in the non-lazy procedure linkage table look like this. */ |
dd7e64d4 | 585 | |
f604c2a2 | 586 | static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
dd7e64d4 L |
587 | { |
588 | 0xff, 0x25, /* jmp indirect */ | |
589 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
590 | 0x66, 0x90 /* xchg %ax,%ax */ | |
591 | }; | |
592 | ||
f604c2a2 L |
593 | /* Entries in the PIC non-lazy procedure linkage table look like |
594 | this. */ | |
dd7e64d4 | 595 | |
f604c2a2 | 596 | static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
dd7e64d4 L |
597 | { |
598 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
599 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
600 | 0x66, 0x90 /* xchg %ax,%ax */ | |
601 | }; | |
602 | ||
ee2fdd6f L |
603 | /* The first entry in an absolute IBT-enabled lazy procedure linkage |
604 | table looks like this. */ | |
605 | ||
606 | static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
607 | { | |
608 | 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */ | |
609 | 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */ | |
610 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ | |
611 | }; | |
612 | ||
613 | /* Subsequent entries for an absolute IBT-enabled lazy procedure linkage | |
614 | table look like this. Subsequent entries for a PIC IBT-enabled lazy | |
615 | procedure linkage table are the same. */ | |
616 | ||
617 | static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
618 | { | |
619 | 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */ | |
620 | 0x68, 0, 0, 0, 0, /* pushl immediate */ | |
621 | 0xe9, 0, 0, 0, 0, /* jmp relative */ | |
622 | 0x66, 0x90 /* xchg %ax,%ax */ | |
623 | }; | |
624 | ||
625 | /* The first entry in a PIC IBT-enabled lazy procedure linkage table | |
626 | look like. */ | |
627 | ||
628 | static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
629 | { | |
630 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
631 | 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */ | |
632 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ | |
633 | }; | |
634 | ||
635 | /* Entries for branches with IBT-enabled in the absolute non-lazey | |
636 | procedure linkage table look like this. They have the same size | |
637 | as the lazy PLT entry. */ | |
638 | ||
639 | static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
640 | { | |
641 | 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */ | |
642 | 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */ | |
643 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
644 | }; | |
645 | ||
646 | /* Entries for branches with IBT-enabled in the PIC non-lazey procedure | |
647 | linkage table look like this. They have the same size as the lazy | |
648 | PLT entry. */ | |
649 | ||
650 | static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
651 | { | |
652 | 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */ | |
653 | 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */ | |
654 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
655 | }; | |
656 | ||
f604c2a2 | 657 | /* .eh_frame covering the lazy .plt section. */ |
e41b3a13 | 658 | |
f604c2a2 | 659 | static const bfd_byte elf_i386_eh_frame_lazy_plt[] = |
e41b3a13 | 660 | { |
e41b3a13 JJ |
661 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ |
662 | 0, 0, 0, 0, /* CIE ID */ | |
663 | 1, /* CIE version */ | |
664 | 'z', 'R', 0, /* Augmentation string */ | |
665 | 1, /* Code alignment factor */ | |
666 | 0x7c, /* Data alignment factor */ | |
667 | 8, /* Return address column */ | |
668 | 1, /* Augmentation size */ | |
669 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
670 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
671 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
672 | DW_CFA_nop, DW_CFA_nop, | |
673 | ||
674 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
675 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
676 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
677 | 0, 0, 0, 0, /* .plt size goes here */ | |
678 | 0, /* Augmentation size */ | |
679 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
680 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
681 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
682 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
683 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
684 | 11, /* Block length */ | |
685 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
686 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
687 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
28ede8be | 688 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, |
e41b3a13 JJ |
689 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop |
690 | }; | |
691 | ||
ee2fdd6f L |
692 | /* .eh_frame covering the lazy .plt section with IBT-enabled. */ |
693 | ||
694 | static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] = | |
695 | { | |
696 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
697 | 0, 0, 0, 0, /* CIE ID */ | |
698 | 1, /* CIE version */ | |
699 | 'z', 'R', 0, /* Augmentation string */ | |
700 | 1, /* Code alignment factor */ | |
701 | 0x7c, /* Data alignment factor */ | |
702 | 8, /* Return address column */ | |
703 | 1, /* Augmentation size */ | |
704 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
705 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
706 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
707 | DW_CFA_nop, DW_CFA_nop, | |
708 | ||
709 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
710 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
711 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
712 | 0, 0, 0, 0, /* .plt size goes here */ | |
713 | 0, /* Augmentation size */ | |
714 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
715 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
716 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
717 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
718 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
719 | 11, /* Block length */ | |
720 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
721 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
722 | DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge, | |
723 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, | |
724 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
725 | }; | |
726 | ||
f604c2a2 | 727 | /* .eh_frame covering the non-lazy .plt section. */ |
fff53dae | 728 | |
f604c2a2 | 729 | static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] = |
fff53dae L |
730 | { |
731 | #define PLT_GOT_FDE_LENGTH 16 | |
732 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
733 | 0, 0, 0, 0, /* CIE ID */ | |
734 | 1, /* CIE version */ | |
735 | 'z', 'R', 0, /* Augmentation string */ | |
736 | 1, /* Code alignment factor */ | |
737 | 0x7c, /* Data alignment factor */ | |
738 | 8, /* Return address column */ | |
739 | 1, /* Augmentation size */ | |
740 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
741 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
742 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
743 | DW_CFA_nop, DW_CFA_nop, | |
744 | ||
745 | PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
746 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
f604c2a2 L |
747 | 0, 0, 0, 0, /* the start of non-lazy .plt goes here */ |
748 | 0, 0, 0, 0, /* non-lazy .plt size goes here */ | |
fff53dae L |
749 | 0, /* Augmentation size */ |
750 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
751 | }; | |
752 | ||
25e762b9 | 753 | /* These are the standard parameters. */ |
765e526c | 754 | static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt = |
25e762b9 | 755 | { |
f604c2a2 L |
756 | elf_i386_lazy_plt0_entry, /* plt0_entry */ |
757 | sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */ | |
f604c2a2 L |
758 | elf_i386_lazy_plt_entry, /* plt_entry */ |
759 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
765e526c L |
760 | 2, /* plt0_got1_offset */ |
761 | 8, /* plt0_got2_offset */ | |
762 | 0, /* plt0_got2_insn_end */ | |
25e762b9 RM |
763 | 2, /* plt_got_offset */ |
764 | 7, /* plt_reloc_offset */ | |
765 | 12, /* plt_plt_offset */ | |
765e526c L |
766 | 0, /* plt_got_insn_size */ |
767 | 0, /* plt_plt_insn_end */ | |
25e762b9 | 768 | 6, /* plt_lazy_offset */ |
f604c2a2 L |
769 | elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */ |
770 | elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */ | |
771 | elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */ | |
772 | sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */ | |
773 | }; | |
774 | ||
765e526c | 775 | static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt = |
f604c2a2 L |
776 | { |
777 | elf_i386_non_lazy_plt_entry, /* plt_entry */ | |
778 | elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */ | |
779 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
780 | 2, /* plt_got_offset */ | |
765e526c | 781 | 0, /* plt_got_insn_size */ |
f604c2a2 L |
782 | elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */ |
783 | sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
25e762b9 | 784 | }; |
ee2fdd6f | 785 | |
765e526c | 786 | static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt = |
ee2fdd6f L |
787 | { |
788 | elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */ | |
789 | sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */ | |
ee2fdd6f L |
790 | elf_i386_lazy_ibt_plt_entry, /* plt_entry */ |
791 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
765e526c L |
792 | 2, /* plt0_got1_offset */ |
793 | 8, /* plt0_got2_offset */ | |
794 | 0, /* plt0_got2_insn_end */ | |
ee2fdd6f L |
795 | 4+2, /* plt_got_offset */ |
796 | 4+1, /* plt_reloc_offset */ | |
797 | 4+6, /* plt_plt_offset */ | |
765e526c L |
798 | 0, /* plt_got_insn_size */ |
799 | 0, /* plt_plt_insn_end */ | |
ee2fdd6f L |
800 | 0, /* plt_lazy_offset */ |
801 | elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */ | |
802 | elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
803 | elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
804 | sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ | |
805 | }; | |
806 | ||
765e526c | 807 | static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt = |
ee2fdd6f L |
808 | { |
809 | elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */ | |
810 | elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */ | |
811 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
812 | 4+2, /* plt_got_offset */ | |
765e526c | 813 | 0, /* plt_got_insn_size */ |
ee2fdd6f L |
814 | elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */ |
815 | sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
816 | }; | |
25e762b9 RM |
817 | \f |
818 | ||
eac338cf PB |
819 | /* On VxWorks, the .rel.plt.unloaded section has absolute relocations |
820 | for the PLTResolve stub and then for each PLT entry. */ | |
821 | #define PLTRESOLVE_RELOCS_SHLIB 0 | |
822 | #define PLTRESOLVE_RELOCS 2 | |
823 | #define PLT_NON_JUMP_SLOT_RELOCS 2 | |
824 | ||
23209a78 RM |
825 | /* Architecture-specific backend data for i386. */ |
826 | ||
827 | struct elf_i386_backend_data | |
828 | { | |
829 | /* Value used to fill the unused bytes of the first PLT entry. */ | |
830 | bfd_byte plt0_pad_byte; | |
831 | ||
f604c2a2 L |
832 | /* Target system. */ |
833 | enum | |
834 | { | |
835 | is_normal, | |
836 | is_vxworks, | |
837 | is_nacl | |
838 | } os; | |
23209a78 RM |
839 | }; |
840 | ||
841 | #define get_elf_i386_backend_data(abfd) \ | |
842 | ((const struct elf_i386_backend_data *) \ | |
843 | get_elf_backend_data (abfd)->arch_data) | |
844 | ||
845 | /* These are the standard parameters. */ | |
846 | static const struct elf_i386_backend_data elf_i386_arch_bed = | |
847 | { | |
848 | 0, /* plt0_pad_byte */ | |
f604c2a2 | 849 | is_normal /* os */ |
23209a78 RM |
850 | }; |
851 | ||
852 | #define elf_backend_arch_data &elf_i386_arch_bed | |
853 | ||
142411ca L |
854 | /* Return TRUE if the TLS access code sequence support transition |
855 | from R_TYPE. */ | |
856 | ||
857 | static bfd_boolean | |
bedfd056 | 858 | elf_i386_check_tls_transition (asection *sec, |
142411ca L |
859 | bfd_byte *contents, |
860 | Elf_Internal_Shdr *symtab_hdr, | |
861 | struct elf_link_hash_entry **sym_hashes, | |
862 | unsigned int r_type, | |
863 | const Elf_Internal_Rela *rel, | |
864 | const Elf_Internal_Rela *relend) | |
13ae64f3 | 865 | { |
6eaa7fb5 | 866 | unsigned int val, type, reg; |
142411ca L |
867 | unsigned long r_symndx; |
868 | struct elf_link_hash_entry *h; | |
869 | bfd_vma offset; | |
6eaa7fb5 | 870 | bfd_byte *call; |
1d4af308 | 871 | bfd_boolean indirect_call; |
142411ca | 872 | |
142411ca | 873 | offset = rel->r_offset; |
13ae64f3 | 874 | switch (r_type) |
142411ca L |
875 | { |
876 | case R_386_TLS_GD: | |
877 | case R_386_TLS_LDM: | |
878 | if (offset < 2 || (rel + 1) >= relend) | |
879 | return FALSE; | |
880 | ||
6eaa7fb5 L |
881 | indirect_call = FALSE; |
882 | call = contents + offset + 4; | |
883 | val = *(call - 5); | |
884 | type = *(call - 6); | |
142411ca L |
885 | if (r_type == R_386_TLS_GD) |
886 | { | |
09e8c3bf | 887 | /* Check transition from GD access model. Only |
6eaa7fb5 L |
888 | leal foo@tlsgd(,%ebx,1), %eax |
889 | call ___tls_get_addr@PLT | |
890 | or | |
891 | leal foo@tlsgd(%ebx) %eax | |
892 | call ___tls_get_addr@PLT | |
893 | nop | |
894 | or | |
895 | leal foo@tlsgd(%reg), %eax | |
896 | call *___tls_get_addr@GOT(%reg) | |
897 | which may be converted to | |
898 | addr32 call ___tls_get_addr | |
142411ca | 899 | can transit to different access model. */ |
6eaa7fb5 L |
900 | if ((offset + 10) > sec->size |
901 | || (type != 0x8d && type != 0x04)) | |
142411ca L |
902 | return FALSE; |
903 | ||
142411ca L |
904 | if (type == 0x04) |
905 | { | |
6eaa7fb5 L |
906 | /* leal foo@tlsgd(,%ebx,1), %eax |
907 | call ___tls_get_addr@PLT */ | |
142411ca L |
908 | if (offset < 3) |
909 | return FALSE; | |
910 | ||
6eaa7fb5 L |
911 | if (*(call - 7) != 0x8d |
912 | || val != 0x1d | |
913 | || call[0] != 0xe8) | |
142411ca L |
914 | return FALSE; |
915 | } | |
916 | else | |
917 | { | |
6eaa7fb5 L |
918 | /* This must be |
919 | leal foo@tlsgd(%ebx), %eax | |
920 | call ___tls_get_addr@PLT | |
921 | nop | |
922 | or | |
923 | leal foo@tlsgd(%reg), %eax | |
924 | call *___tls_get_addr@GOT(%reg) | |
925 | which may be converted to | |
926 | addr32 call ___tls_get_addr | |
927 | ||
928 | %eax can't be used as the GOT base register since it | |
929 | is used to pass parameter to ___tls_get_addr. */ | |
930 | reg = val & 7; | |
931 | if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0) | |
142411ca L |
932 | return FALSE; |
933 | ||
6eaa7fb5 L |
934 | indirect_call = call[0] == 0xff; |
935 | if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90) | |
936 | && !(call[0] == 0x67 && call[1] == 0xe8) | |
937 | && !(indirect_call | |
938 | && (call[1] & 0xf8) == 0x90 | |
939 | && (call[1] & 0x7) == reg)) | |
142411ca L |
940 | return FALSE; |
941 | } | |
942 | } | |
943 | else | |
944 | { | |
945 | /* Check transition from LD access model. Only | |
6eaa7fb5 L |
946 | leal foo@tlsldm(%ebx), %eax |
947 | call ___tls_get_addr@PLT | |
948 | or | |
949 | leal foo@tlsldm(%reg), %eax | |
950 | call *___tls_get_addr@GOT(%reg) | |
951 | which may be converted to | |
952 | addr32 call ___tls_get_addr | |
142411ca L |
953 | can transit to different access model. */ |
954 | if (type != 0x8d || (offset + 9) > sec->size) | |
955 | return FALSE; | |
956 | ||
6eaa7fb5 L |
957 | /* %eax can't be used as the GOT base register since it is |
958 | used to pass parameter to ___tls_get_addr. */ | |
959 | reg = val & 7; | |
960 | if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0) | |
142411ca | 961 | return FALSE; |
142411ca | 962 | |
6eaa7fb5 L |
963 | indirect_call = call[0] == 0xff; |
964 | if (!(reg == 3 && call[0] == 0xe8) | |
965 | && !(call[0] == 0x67 && call[1] == 0xe8) | |
966 | && !(indirect_call | |
967 | && (call[1] & 0xf8) == 0x90 | |
968 | && (call[1] & 0x7) == reg)) | |
969 | return FALSE; | |
970 | } | |
142411ca L |
971 | |
972 | r_symndx = ELF32_R_SYM (rel[1].r_info); | |
973 | if (r_symndx < symtab_hdr->sh_info) | |
974 | return FALSE; | |
975 | ||
976 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1d4af308 | 977 | if (h == NULL |
0afcef53 | 978 | || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr) |
6eaa7fb5 L |
979 | return FALSE; |
980 | else if (indirect_call) | |
981 | return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X); | |
982 | else | |
983 | return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32 | |
984 | || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); | |
142411ca L |
985 | |
986 | case R_386_TLS_IE: | |
987 | /* Check transition from IE access model: | |
988 | movl foo@indntpoff(%rip), %eax | |
989 | movl foo@indntpoff(%rip), %reg | |
990 | addl foo@indntpoff(%rip), %reg | |
991 | */ | |
992 | ||
993 | if (offset < 1 || (offset + 4) > sec->size) | |
994 | return FALSE; | |
995 | ||
996 | /* Check "movl foo@tpoff(%rip), %eax" first. */ | |
997 | val = bfd_get_8 (abfd, contents + offset - 1); | |
998 | if (val == 0xa1) | |
999 | return TRUE; | |
1000 | ||
1001 | if (offset < 2) | |
1002 | return FALSE; | |
1003 | ||
1004 | /* Check movl|addl foo@tpoff(%rip), %reg. */ | |
1005 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1006 | return ((type == 0x8b || type == 0x03) | |
1007 | && (val & 0xc7) == 0x05); | |
1008 | ||
1009 | case R_386_TLS_GOTIE: | |
1010 | case R_386_TLS_IE_32: | |
1011 | /* Check transition from {IE_32,GOTIE} access model: | |
1012 | subl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1013 | movl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1014 | addl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1015 | */ | |
1016 | ||
1017 | if (offset < 2 || (offset + 4) > sec->size) | |
1018 | return FALSE; | |
1019 | ||
1020 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1021 | if ((val & 0xc0) != 0x80 || (val & 7) == 4) | |
1022 | return FALSE; | |
1023 | ||
1024 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1025 | return type == 0x8b || type == 0x2b || type == 0x03; | |
1026 | ||
1027 | case R_386_TLS_GOTDESC: | |
1028 | /* Check transition from GDesc access model: | |
1029 | leal x@tlsdesc(%ebx), %eax | |
1030 | ||
1031 | Make sure it's a leal adding ebx to a 32-bit offset | |
1032 | into any register, although it's probably almost always | |
1033 | going to be eax. */ | |
1034 | ||
1035 | if (offset < 2 || (offset + 4) > sec->size) | |
1036 | return FALSE; | |
1037 | ||
1038 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1039 | return FALSE; | |
1040 | ||
1041 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1042 | return (val & 0xc7) == 0x83; | |
1043 | ||
1044 | case R_386_TLS_DESC_CALL: | |
1045 | /* Check transition from GDesc access model: | |
6eaa7fb5 | 1046 | call *x@tlsdesc(%eax) |
142411ca L |
1047 | */ |
1048 | if (offset + 2 <= sec->size) | |
1049 | { | |
6eaa7fb5 L |
1050 | /* Make sure that it's a call *x@tlsdesc(%eax). */ |
1051 | call = contents + offset; | |
1052 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1053 | } |
1054 | ||
1055 | return FALSE; | |
1056 | ||
1057 | default: | |
1058 | abort (); | |
1059 | } | |
1060 | } | |
1061 | ||
1062 | /* Return TRUE if the TLS access transition is OK or no transition | |
1063 | will be performed. Update R_TYPE if there is a transition. */ | |
1064 | ||
1065 | static bfd_boolean | |
1066 | elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd, | |
1067 | asection *sec, bfd_byte *contents, | |
1068 | Elf_Internal_Shdr *symtab_hdr, | |
1069 | struct elf_link_hash_entry **sym_hashes, | |
1070 | unsigned int *r_type, int tls_type, | |
1071 | const Elf_Internal_Rela *rel, | |
1072 | const Elf_Internal_Rela *relend, | |
4c544807 | 1073 | struct elf_link_hash_entry *h, |
bedfd056 L |
1074 | unsigned long r_symndx, |
1075 | bfd_boolean from_relocate_section) | |
142411ca L |
1076 | { |
1077 | unsigned int from_type = *r_type; | |
1078 | unsigned int to_type = from_type; | |
1079 | bfd_boolean check = TRUE; | |
1080 | ||
bb1cb422 L |
1081 | /* Skip TLS transition for functions. */ |
1082 | if (h != NULL | |
1083 | && (h->type == STT_FUNC | |
1084 | || h->type == STT_GNU_IFUNC)) | |
1085 | return TRUE; | |
1086 | ||
142411ca | 1087 | switch (from_type) |
13ae64f3 JJ |
1088 | { |
1089 | case R_386_TLS_GD: | |
67a4f2b7 AO |
1090 | case R_386_TLS_GOTDESC: |
1091 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 1092 | case R_386_TLS_IE_32: |
37e55690 JJ |
1093 | case R_386_TLS_IE: |
1094 | case R_386_TLS_GOTIE: | |
0e1862bb | 1095 | if (bfd_link_executable (info)) |
142411ca L |
1096 | { |
1097 | if (h == NULL) | |
1098 | to_type = R_386_TLS_LE_32; | |
1099 | else if (from_type != R_386_TLS_IE | |
1100 | && from_type != R_386_TLS_GOTIE) | |
1101 | to_type = R_386_TLS_IE_32; | |
1102 | } | |
1103 | ||
bedfd056 L |
1104 | /* When we are called from elf_i386_relocate_section, there may |
1105 | be additional transitions based on TLS_TYPE. */ | |
1106 | if (from_relocate_section) | |
142411ca L |
1107 | { |
1108 | unsigned int new_to_type = to_type; | |
1109 | ||
51537393 | 1110 | if (TLS_TRANSITION_IE_TO_LE_P (info, h, tls_type)) |
142411ca L |
1111 | new_to_type = R_386_TLS_LE_32; |
1112 | ||
1113 | if (to_type == R_386_TLS_GD | |
1114 | || to_type == R_386_TLS_GOTDESC | |
1115 | || to_type == R_386_TLS_DESC_CALL) | |
1116 | { | |
1117 | if (tls_type == GOT_TLS_IE_POS) | |
1118 | new_to_type = R_386_TLS_GOTIE; | |
1119 | else if (tls_type & GOT_TLS_IE) | |
1120 | new_to_type = R_386_TLS_IE_32; | |
1121 | } | |
1122 | ||
1123 | /* We checked the transition before when we were called from | |
1124 | elf_i386_check_relocs. We only want to check the new | |
1125 | transition which hasn't been checked before. */ | |
1126 | check = new_to_type != to_type && from_type == to_type; | |
1127 | to_type = new_to_type; | |
1128 | } | |
1129 | ||
1130 | break; | |
1131 | ||
13ae64f3 | 1132 | case R_386_TLS_LDM: |
0e1862bb | 1133 | if (bfd_link_executable (info)) |
142411ca L |
1134 | to_type = R_386_TLS_LE_32; |
1135 | break; | |
1136 | ||
1137 | default: | |
1138 | return TRUE; | |
1139 | } | |
1140 | ||
1141 | /* Return TRUE if there is no transition. */ | |
1142 | if (from_type == to_type) | |
1143 | return TRUE; | |
1144 | ||
1145 | /* Check if the transition can be performed. */ | |
1146 | if (check | |
bedfd056 | 1147 | && ! elf_i386_check_tls_transition (sec, contents, |
142411ca L |
1148 | symtab_hdr, sym_hashes, |
1149 | from_type, rel, relend)) | |
1150 | { | |
2f629d23 | 1151 | reloc_howto_type *from, *to; |
4c544807 | 1152 | const char *name; |
142411ca L |
1153 | |
1154 | from = elf_i386_rtype_to_howto (abfd, from_type); | |
1155 | to = elf_i386_rtype_to_howto (abfd, to_type); | |
1156 | ||
4c544807 L |
1157 | if (h) |
1158 | name = h->root.root.string; | |
1159 | else | |
1160 | { | |
0afcef53 | 1161 | struct elf_x86_link_hash_table *htab; |
4dfe6ac6 | 1162 | |
0afcef53 | 1163 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 NC |
1164 | if (htab == NULL) |
1165 | name = "*unknown*"; | |
1166 | else | |
1167 | { | |
1168 | Elf_Internal_Sym *isym; | |
1169 | ||
1170 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1171 | abfd, r_symndx); | |
1172 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1173 | } | |
4c544807 L |
1174 | } |
1175 | ||
4eca0228 | 1176 | _bfd_error_handler |
695344c0 | 1177 | /* xgettext:c-format */ |
d42c267e | 1178 | (_("%B: TLS transition from %s to %s against `%s' at %#Lx " |
142411ca | 1179 | "in section `%A' failed"), |
c08bb8dd | 1180 | abfd, from->name, to->name, name, |
d42c267e | 1181 | rel->r_offset, sec); |
142411ca L |
1182 | bfd_set_error (bfd_error_bad_value); |
1183 | return FALSE; | |
13ae64f3 JJ |
1184 | } |
1185 | ||
142411ca L |
1186 | *r_type = to_type; |
1187 | return TRUE; | |
13ae64f3 JJ |
1188 | } |
1189 | ||
c175a657 L |
1190 | /* With the local symbol, foo, we convert |
1191 | mov foo@GOT[(%reg1)], %reg2 | |
1192 | to | |
1193 | lea foo[@GOTOFF(%reg1)], %reg2 | |
1194 | and convert | |
1195 | call/jmp *foo@GOT[(%reg)] | |
1196 | to | |
1197 | nop call foo/jmp foo nop | |
1198 | When PIC is false, convert | |
1199 | test %reg1, foo@GOT[(%reg2)] | |
1200 | to | |
1201 | test $foo, %reg1 | |
1202 | and convert | |
1203 | binop foo@GOT[(%reg1)], %reg2 | |
1204 | to | |
1205 | binop $foo, %reg2 | |
1206 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1207 | instructions. */ | |
1208 | ||
1209 | static | |
1210 | bfd_boolean | |
1211 | elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr, | |
1212 | bfd_byte *contents, | |
6999821f | 1213 | unsigned int *r_type_p, |
c175a657 L |
1214 | Elf_Internal_Rela *irel, |
1215 | struct elf_link_hash_entry *h, | |
5e5e02ae | 1216 | bfd_boolean *converted, |
c175a657 L |
1217 | struct bfd_link_info *link_info) |
1218 | { | |
0afcef53 | 1219 | struct elf_x86_link_hash_table *htab; |
c175a657 L |
1220 | unsigned int opcode; |
1221 | unsigned int modrm; | |
1222 | bfd_boolean baseless; | |
1223 | Elf_Internal_Sym *isym; | |
1224 | unsigned int addend; | |
1225 | unsigned int nop; | |
1226 | bfd_vma nop_offset; | |
1227 | bfd_boolean is_pic; | |
1228 | bfd_boolean to_reloc_32; | |
1229 | unsigned int r_type; | |
1230 | unsigned int r_symndx; | |
1231 | bfd_vma roff = irel->r_offset; | |
0a27fed7 L |
1232 | bfd_boolean local_ref; |
1233 | struct elf_x86_link_hash_entry *eh; | |
c175a657 L |
1234 | |
1235 | if (roff < 2) | |
1236 | return TRUE; | |
1237 | ||
7d4d9709 | 1238 | /* Addend for R_386_GOT32X relocations must be 0. */ |
c175a657 L |
1239 | addend = bfd_get_32 (abfd, contents + roff); |
1240 | if (addend != 0) | |
1241 | return TRUE; | |
1242 | ||
0afcef53 | 1243 | htab = elf_x86_hash_table (link_info, I386_ELF_DATA); |
c175a657 L |
1244 | is_pic = bfd_link_pic (link_info); |
1245 | ||
6999821f | 1246 | r_type = *r_type_p; |
c175a657 L |
1247 | r_symndx = ELF32_R_SYM (irel->r_info); |
1248 | ||
1249 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1250 | baseless = (modrm & 0xc7) == 0x5; | |
1251 | ||
7d4d9709 | 1252 | if (baseless && is_pic) |
c175a657 L |
1253 | { |
1254 | /* For PIC, disallow R_386_GOT32X without a base register | |
7d4d9709 | 1255 | since we don't know what the GOT base is. */ |
c175a657 L |
1256 | const char *name; |
1257 | ||
1258 | if (h == NULL) | |
1259 | { | |
1260 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, | |
1261 | r_symndx); | |
1262 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1263 | } | |
1264 | else | |
1265 | name = h->root.root.string; | |
1266 | ||
4eca0228 | 1267 | _bfd_error_handler |
695344c0 | 1268 | /* xgettext:c-format */ |
63a5468a AM |
1269 | (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base" |
1270 | " register can not be used when making a shared object"), | |
c175a657 L |
1271 | abfd, name); |
1272 | return FALSE; | |
1273 | } | |
1274 | ||
1275 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1276 | ||
c175a657 L |
1277 | /* Convert to R_386_32 if PIC is false or there is no base |
1278 | register. */ | |
1279 | to_reloc_32 = !is_pic || baseless; | |
1280 | ||
0a27fed7 L |
1281 | eh = elf_x86_hash_entry (h); |
1282 | ||
7d4d9709 L |
1283 | /* Try to convert R_386_GOT32X. Get the symbol referred to by the |
1284 | reloc. */ | |
c175a657 L |
1285 | if (h == NULL) |
1286 | { | |
1287 | if (opcode == 0x0ff) | |
1288 | /* Convert "call/jmp *foo@GOT[(%reg)]". */ | |
1289 | goto convert_branch; | |
1290 | else | |
1291 | /* Convert "mov foo@GOT[(%reg1)], %reg2", | |
1292 | "test %reg1, foo@GOT(%reg2)" and | |
1293 | "binop foo@GOT[(%reg1)], %reg2". */ | |
1294 | goto convert_load; | |
1295 | } | |
1296 | ||
0a27fed7 L |
1297 | /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */ |
1298 | local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h); | |
1299 | ||
c175a657 L |
1300 | /* Undefined weak symbol is only bound locally in executable |
1301 | and its reference is resolved as 0. */ | |
0a27fed7 L |
1302 | if (h->root.type == bfd_link_hash_undefweak |
1303 | && !eh->linker_def | |
1304 | && local_ref) | |
c175a657 L |
1305 | { |
1306 | if (opcode == 0xff) | |
1307 | { | |
1308 | /* No direct branch to 0 for PIC. */ | |
1309 | if (is_pic) | |
1310 | return TRUE; | |
1311 | else | |
1312 | goto convert_branch; | |
1313 | } | |
1314 | else | |
1315 | { | |
1316 | /* We can convert load of address 0 to R_386_32. */ | |
1317 | to_reloc_32 = TRUE; | |
1318 | goto convert_load; | |
1319 | } | |
1320 | } | |
1321 | ||
1322 | if (opcode == 0xff) | |
1323 | { | |
1324 | /* We have "call/jmp *foo@GOT[(%reg)]". */ | |
1325 | if ((h->root.type == bfd_link_hash_defined | |
1326 | || h->root.type == bfd_link_hash_defweak) | |
0a27fed7 | 1327 | && local_ref) |
c175a657 L |
1328 | { |
1329 | /* The function is locally defined. */ | |
1330 | convert_branch: | |
1331 | /* Convert R_386_GOT32X to R_386_PC32. */ | |
1332 | if (modrm == 0x15 || (modrm & 0xf8) == 0x90) | |
1333 | { | |
1334 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE | |
1335 | is a nop prefix. */ | |
1336 | modrm = 0xe8; | |
6eaa7fb5 L |
1337 | /* To support TLS optimization, always use addr32 prefix |
1338 | for "call *___tls_get_addr@GOT(%reg)". */ | |
1d4af308 | 1339 | if (eh && eh->tls_get_addr) |
c175a657 | 1340 | { |
6eaa7fb5 L |
1341 | nop = 0x67; |
1342 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1343 | } |
1344 | else | |
6eaa7fb5 L |
1345 | { |
1346 | nop = link_info->call_nop_byte; | |
1347 | if (link_info->call_nop_as_suffix) | |
1348 | { | |
1349 | nop_offset = roff + 3; | |
1350 | irel->r_offset -= 1; | |
1351 | } | |
1352 | else | |
1353 | nop_offset = roff - 2; | |
1354 | } | |
c175a657 L |
1355 | } |
1356 | else | |
1357 | { | |
1358 | /* Convert to "jmp foo nop". */ | |
1359 | modrm = 0xe9; | |
1360 | nop = NOP_OPCODE; | |
1361 | nop_offset = roff + 3; | |
1362 | irel->r_offset -= 1; | |
1363 | } | |
1364 | ||
1365 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1366 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1367 | /* When converting to PC-relative relocation, we | |
1368 | need to adjust addend by -4. */ | |
1369 | bfd_put_32 (abfd, -4, contents + irel->r_offset); | |
1370 | irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32); | |
6999821f | 1371 | *r_type_p = R_386_PC32; |
5e5e02ae | 1372 | *converted = TRUE; |
c175a657 L |
1373 | } |
1374 | } | |
1375 | else | |
1376 | { | |
1377 | /* We have "mov foo@GOT[(%re1g)], %reg2", | |
1378 | "test %reg1, foo@GOT(%reg2)" and | |
1379 | "binop foo@GOT[(%reg1)], %reg2". | |
1380 | ||
1381 | Avoid optimizing _DYNAMIC since ld.so may use its | |
1382 | link-time address. */ | |
1383 | if (h == htab->elf.hdynamic) | |
1384 | return TRUE; | |
1385 | ||
1386 | /* def_regular is set by an assignment in a linker script in | |
cbd0eecf L |
1387 | bfd_elf_record_link_assignment. start_stop is set on |
1388 | __start_SECNAME/__stop_SECNAME which mark section SECNAME. */ | |
1389 | if (h->start_stop | |
0a27fed7 | 1390 | || eh->linker_def |
cbd0eecf L |
1391 | || ((h->def_regular |
1392 | || h->root.type == bfd_link_hash_defined | |
1393 | || h->root.type == bfd_link_hash_defweak) | |
0a27fed7 | 1394 | && local_ref)) |
c175a657 L |
1395 | { |
1396 | convert_load: | |
1397 | if (opcode == 0x8b) | |
1398 | { | |
1399 | if (to_reloc_32) | |
1400 | { | |
1401 | /* Convert "mov foo@GOT[(%reg1)], %reg2" to | |
1402 | "mov $foo, %reg2" with R_386_32. */ | |
1403 | r_type = R_386_32; | |
1404 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1405 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1406 | opcode = 0xc7; | |
1407 | } | |
1408 | else | |
1409 | { | |
1410 | /* Convert "mov foo@GOT(%reg1), %reg2" to | |
1411 | "lea foo@GOTOFF(%reg1), %reg2". */ | |
1412 | r_type = R_386_GOTOFF; | |
1413 | opcode = 0x8d; | |
1414 | } | |
1415 | } | |
1416 | else | |
1417 | { | |
1418 | /* Only R_386_32 is supported. */ | |
1419 | if (!to_reloc_32) | |
1420 | return TRUE; | |
1421 | ||
1422 | if (opcode == 0x85) | |
1423 | { | |
1424 | /* Convert "test %reg1, foo@GOT(%reg2)" to | |
1425 | "test $foo, %reg1". */ | |
1426 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1427 | opcode = 0xf7; | |
1428 | } | |
1429 | else | |
1430 | { | |
1431 | /* Convert "binop foo@GOT(%reg1), %reg2" to | |
1432 | "binop $foo, %reg2". */ | |
1433 | modrm = (0xc0 | |
1434 | | (modrm & 0x38) >> 3 | |
1435 | | (opcode & 0x3c)); | |
1436 | opcode = 0x81; | |
1437 | } | |
1438 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1439 | r_type = R_386_32; | |
1440 | } | |
1441 | ||
1442 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1443 | irel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
6999821f | 1444 | *r_type_p = r_type; |
5e5e02ae | 1445 | *converted = TRUE; |
c175a657 L |
1446 | } |
1447 | } | |
1448 | ||
1449 | return TRUE; | |
1450 | } | |
1451 | ||
c1d11331 L |
1452 | /* Rename some of the generic section flags to better document how they |
1453 | are used here. */ | |
6999821f | 1454 | #define check_relocs_failed sec_flg0 |
c1d11331 | 1455 | |
252b5132 | 1456 | /* Look through the relocs for a section during the first phase, and |
0ac8d2ca AM |
1457 | calculate needed space in the global offset table, procedure linkage |
1458 | table, and dynamic reloc sections. */ | |
252b5132 | 1459 | |
b34976b6 | 1460 | static bfd_boolean |
55fd94b0 AM |
1461 | elf_i386_check_relocs (bfd *abfd, |
1462 | struct bfd_link_info *info, | |
1463 | asection *sec, | |
1464 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1465 | { |
0afcef53 | 1466 | struct elf_x86_link_hash_table *htab; |
252b5132 RH |
1467 | Elf_Internal_Shdr *symtab_hdr; |
1468 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
1469 | const Elf_Internal_Rela *rel; |
1470 | const Elf_Internal_Rela *rel_end; | |
252b5132 | 1471 | asection *sreloc; |
bedfd056 | 1472 | bfd_byte *contents; |
5e5e02ae | 1473 | bfd_boolean converted; |
252b5132 | 1474 | |
0e1862bb | 1475 | if (bfd_link_relocatable (info)) |
b34976b6 | 1476 | return TRUE; |
252b5132 | 1477 | |
081b1afe L |
1478 | /* Don't do anything special with non-loaded, non-alloced sections. |
1479 | In particular, any relocs in such sections should not affect GOT | |
1480 | and PLT reference counting (ie. we don't allow them to create GOT | |
1481 | or PLT entries), there's no possibility or desire to optimize TLS | |
1482 | relocs, and there's not much point in propagating relocs to shared | |
1483 | libs that the dynamic linker won't relocate. */ | |
1484 | if ((sec->flags & SEC_ALLOC) == 0) | |
1485 | return TRUE; | |
1486 | ||
0afcef53 | 1487 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 | 1488 | if (htab == NULL) |
c337a162 L |
1489 | { |
1490 | sec->check_relocs_failed = 1; | |
1491 | return FALSE; | |
1492 | } | |
4dfe6ac6 | 1493 | |
fe53b4a4 L |
1494 | BFD_ASSERT (is_x86_elf (abfd, htab)); |
1495 | ||
bedfd056 L |
1496 | /* Get the section contents. */ |
1497 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1498 | contents = elf_section_data (sec)->this_hdr.contents; | |
1499 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1500 | { | |
1501 | sec->check_relocs_failed = 1; | |
1502 | return FALSE; | |
1503 | } | |
1504 | ||
0ffa91dd | 1505 | symtab_hdr = &elf_symtab_hdr (abfd); |
252b5132 | 1506 | sym_hashes = elf_sym_hashes (abfd); |
252b5132 | 1507 | |
5e5e02ae L |
1508 | converted = FALSE; |
1509 | ||
252b5132 RH |
1510 | sreloc = NULL; |
1511 | ||
1512 | rel_end = relocs + sec->reloc_count; | |
1513 | for (rel = relocs; rel < rel_end; rel++) | |
1514 | { | |
13ae64f3 | 1515 | unsigned int r_type; |
d42c267e | 1516 | unsigned int r_symndx; |
252b5132 | 1517 | struct elf_link_hash_entry *h; |
0afcef53 | 1518 | struct elf_x86_link_hash_entry *eh; |
4c544807 L |
1519 | Elf_Internal_Sym *isym; |
1520 | const char *name; | |
06a6a421 | 1521 | bfd_boolean size_reloc; |
252b5132 RH |
1522 | |
1523 | r_symndx = ELF32_R_SYM (rel->r_info); | |
13ae64f3 | 1524 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 1525 | |
d9bc7a44 | 1526 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
f5f31454 | 1527 | { |
695344c0 | 1528 | /* xgettext:c-format */ |
4eca0228 AM |
1529 | _bfd_error_handler (_("%B: bad symbol index: %d"), |
1530 | abfd, r_symndx); | |
c337a162 | 1531 | goto error_return; |
f5f31454 L |
1532 | } |
1533 | ||
252b5132 | 1534 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1535 | { |
1536 | /* A local symbol. */ | |
c2e61a4e L |
1537 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1538 | abfd, r_symndx); | |
1539 | if (isym == NULL) | |
c337a162 | 1540 | goto error_return; |
c25bc9fc L |
1541 | |
1542 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
c25bc9fc L |
1543 | if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
1544 | { | |
0afcef53 | 1545 | h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE); |
c25bc9fc | 1546 | if (h == NULL) |
c337a162 | 1547 | goto error_return; |
6bbec505 | 1548 | |
c25bc9fc | 1549 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
1550 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
1551 | isym, NULL); | |
c25bc9fc L |
1552 | h->type = STT_GNU_IFUNC; |
1553 | h->def_regular = 1; | |
1554 | h->ref_regular = 1; | |
1555 | h->forced_local = 1; | |
1556 | h->root.type = bfd_link_hash_defined; | |
1557 | } | |
1558 | else | |
1559 | h = NULL; | |
1560 | } | |
252b5132 | 1561 | else |
71cb9464 | 1562 | { |
4c544807 | 1563 | isym = NULL; |
71cb9464 L |
1564 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1565 | while (h->root.type == bfd_link_hash_indirect | |
1566 | || h->root.type == bfd_link_hash_warning) | |
1567 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1568 | } |
cbe950e9 | 1569 | |
0afcef53 | 1570 | eh = (struct elf_x86_link_hash_entry *) h; |
c25bc9fc L |
1571 | if (h != NULL) |
1572 | { | |
f604c2a2 L |
1573 | if (r_type == R_386_GOTOFF) |
1574 | eh->gotoff_ref = 1; | |
cbe950e9 | 1575 | |
ad1e85de L |
1576 | /* It is referenced by a non-shared object. */ |
1577 | h->ref_regular = 1; | |
bc4e12de | 1578 | h->root.non_ir_ref_regular = 1; |
13a2df29 L |
1579 | |
1580 | if (h->type == STT_GNU_IFUNC) | |
1581 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
1582 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 1583 | } |
252b5132 | 1584 | |
6999821f L |
1585 | if (r_type == R_386_GOT32X |
1586 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
1587 | { | |
1588 | Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel; | |
1589 | if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents, | |
5e5e02ae L |
1590 | &r_type, irel, h, |
1591 | &converted, info)) | |
6999821f L |
1592 | goto error_return; |
1593 | } | |
1594 | ||
bedfd056 | 1595 | if (! elf_i386_tls_transition (info, abfd, sec, contents, |
142411ca L |
1596 | symtab_hdr, sym_hashes, |
1597 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 1598 | rel, rel_end, h, r_symndx, FALSE)) |
c337a162 | 1599 | goto error_return; |
13ae64f3 JJ |
1600 | |
1601 | switch (r_type) | |
252b5132 | 1602 | { |
37e55690 | 1603 | case R_386_TLS_LDM: |
0afcef53 | 1604 | htab->tls_ld_or_ldm_got.refcount += 1; |
37e55690 JJ |
1605 | goto create_got; |
1606 | ||
1607 | case R_386_PLT32: | |
1608 | /* This symbol requires a procedure linkage table entry. We | |
1609 | actually build the entry in adjust_dynamic_symbol, | |
1610 | because this might be a case of linking PIC code which is | |
1611 | never referenced by a dynamic object, in which case we | |
1612 | don't need to generate a procedure linkage table entry | |
1613 | after all. */ | |
1614 | ||
1615 | /* If this is a local symbol, we resolve it directly without | |
1616 | creating a procedure linkage table entry. */ | |
1617 | if (h == NULL) | |
1618 | continue; | |
1619 | ||
aec6b87e | 1620 | eh->has_got_reloc = 1; |
f5385ebf | 1621 | h->needs_plt = 1; |
37e55690 JJ |
1622 | h->plt.refcount += 1; |
1623 | break; | |
1624 | ||
6a3e1bae | 1625 | case R_386_SIZE32: |
06a6a421 | 1626 | size_reloc = TRUE; |
6a3e1bae L |
1627 | goto do_size; |
1628 | ||
13ae64f3 | 1629 | case R_386_TLS_IE_32: |
37e55690 JJ |
1630 | case R_386_TLS_IE: |
1631 | case R_386_TLS_GOTIE: | |
0e1862bb | 1632 | if (!bfd_link_executable (info)) |
13ae64f3 | 1633 | info->flags |= DF_STATIC_TLS; |
37e55690 JJ |
1634 | /* Fall through */ |
1635 | ||
252b5132 | 1636 | case R_386_GOT32: |
02a86693 | 1637 | case R_386_GOT32X: |
13ae64f3 | 1638 | case R_386_TLS_GD: |
67a4f2b7 AO |
1639 | case R_386_TLS_GOTDESC: |
1640 | case R_386_TLS_DESC_CALL: | |
252b5132 | 1641 | /* This symbol requires a global offset table entry. */ |
13ae64f3 JJ |
1642 | { |
1643 | int tls_type, old_tls_type; | |
1644 | ||
1645 | switch (r_type) | |
1646 | { | |
1647 | default: | |
02a86693 L |
1648 | case R_386_GOT32: |
1649 | case R_386_GOT32X: | |
1650 | tls_type = GOT_NORMAL; | |
1651 | break; | |
13ae64f3 | 1652 | case R_386_TLS_GD: tls_type = GOT_TLS_GD; break; |
67a4f2b7 AO |
1653 | case R_386_TLS_GOTDESC: |
1654 | case R_386_TLS_DESC_CALL: | |
1655 | tls_type = GOT_TLS_GDESC; break; | |
37e55690 JJ |
1656 | case R_386_TLS_IE_32: |
1657 | if (ELF32_R_TYPE (rel->r_info) == r_type) | |
1658 | tls_type = GOT_TLS_IE_NEG; | |
1659 | else | |
ebcfb3c0 JJ |
1660 | /* If this is a GD->IE transition, we may use either of |
1661 | R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */ | |
37e55690 JJ |
1662 | tls_type = GOT_TLS_IE; |
1663 | break; | |
1664 | case R_386_TLS_IE: | |
1665 | case R_386_TLS_GOTIE: | |
1666 | tls_type = GOT_TLS_IE_POS; break; | |
13ae64f3 JJ |
1667 | } |
1668 | ||
1669 | if (h != NULL) | |
1670 | { | |
1671 | h->got.refcount += 1; | |
0afcef53 | 1672 | old_tls_type = elf_x86_hash_entry (h)->tls_type; |
13ae64f3 JJ |
1673 | } |
1674 | else | |
1675 | { | |
1676 | bfd_signed_vma *local_got_refcounts; | |
1677 | ||
1678 | /* This is a global offset table entry for a local symbol. */ | |
1679 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1680 | if (local_got_refcounts == NULL) | |
1681 | { | |
1682 | bfd_size_type size; | |
1683 | ||
1684 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1685 | size *= (sizeof (bfd_signed_vma) |
1686 | + sizeof (bfd_vma) + sizeof(char)); | |
a50b1753 NC |
1687 | local_got_refcounts = (bfd_signed_vma *) |
1688 | bfd_zalloc (abfd, size); | |
13ae64f3 | 1689 | if (local_got_refcounts == NULL) |
c337a162 | 1690 | goto error_return; |
13ae64f3 | 1691 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
0afcef53 | 1692 | elf_x86_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 1693 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
0afcef53 | 1694 | elf_x86_local_got_tls_type (abfd) |
67a4f2b7 | 1695 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
13ae64f3 JJ |
1696 | } |
1697 | local_got_refcounts[r_symndx] += 1; | |
0afcef53 | 1698 | old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx]; |
13ae64f3 JJ |
1699 | } |
1700 | ||
37e55690 JJ |
1701 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) |
1702 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1703 | /* If a TLS symbol is accessed using IE at least once, |
1704 | there is no point to use dynamic model for it. */ | |
ebcfb3c0 | 1705 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN |
67a4f2b7 | 1706 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
37e55690 | 1707 | || (tls_type & GOT_TLS_IE) == 0)) |
13ae64f3 | 1708 | { |
67a4f2b7 | 1709 | if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type)) |
37e55690 | 1710 | tls_type = old_tls_type; |
67a4f2b7 AO |
1711 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1712 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1713 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1714 | else |
1715 | { | |
09a24cbf | 1716 | if (h) |
4c544807 L |
1717 | name = h->root.root.string; |
1718 | else | |
1719 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1720 | NULL); | |
4eca0228 | 1721 | _bfd_error_handler |
695344c0 | 1722 | /* xgettext:c-format */ |
d003868e | 1723 | (_("%B: `%s' accessed both as normal and " |
55fd94b0 | 1724 | "thread local symbol"), |
4c544807 | 1725 | abfd, name); |
68c4a57e | 1726 | bfd_set_error (bfd_error_bad_value); |
c337a162 | 1727 | goto error_return; |
13ae64f3 JJ |
1728 | } |
1729 | } | |
1730 | ||
1731 | if (old_tls_type != tls_type) | |
1732 | { | |
1733 | if (h != NULL) | |
0afcef53 | 1734 | elf_x86_hash_entry (h)->tls_type = tls_type; |
13ae64f3 | 1735 | else |
0afcef53 | 1736 | elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type; |
13ae64f3 JJ |
1737 | } |
1738 | } | |
0ac8d2ca AM |
1739 | /* Fall through */ |
1740 | ||
1741 | case R_386_GOTOFF: | |
1742 | case R_386_GOTPC: | |
13ae64f3 | 1743 | create_got: |
37e55690 | 1744 | if (r_type != R_386_TLS_IE) |
aec6b87e L |
1745 | { |
1746 | if (eh != NULL) | |
1747 | eh->has_got_reloc = 1; | |
1748 | break; | |
1749 | } | |
37e55690 | 1750 | /* Fall through */ |
252b5132 | 1751 | |
37e55690 JJ |
1752 | case R_386_TLS_LE_32: |
1753 | case R_386_TLS_LE: | |
aec6b87e L |
1754 | if (eh != NULL) |
1755 | eh->has_got_reloc = 1; | |
0e1862bb | 1756 | if (bfd_link_executable (info)) |
37e55690 | 1757 | break; |
bffbf940 | 1758 | info->flags |= DF_STATIC_TLS; |
aec6b87e | 1759 | goto do_relocation; |
252b5132 RH |
1760 | |
1761 | case R_386_32: | |
1762 | case R_386_PC32: | |
aec6b87e L |
1763 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
1764 | eh->has_non_got_reloc = 1; | |
1765 | do_relocation: | |
bf52d7c7 L |
1766 | /* We are called after all symbols have been resolved. Only |
1767 | relocation against STT_GNU_IFUNC symbol must go through | |
1768 | PLT. */ | |
d1ed1c7d L |
1769 | if (h != NULL |
1770 | && (bfd_link_executable (info) | |
bf52d7c7 | 1771 | || h->type == STT_GNU_IFUNC)) |
6725bdbf | 1772 | { |
12d0ee4a | 1773 | /* If this reloc is in a read-only section, we might |
ebe50bae AM |
1774 | need a copy reloc. We can't check reliably at this |
1775 | stage whether the section is read-only, as input | |
1776 | sections have not yet been mapped to output sections. | |
1777 | Tentatively set the flag for now, and correct in | |
1778 | adjust_dynamic_symbol. */ | |
f5385ebf | 1779 | h->non_got_ref = 1; |
12d0ee4a | 1780 | |
233cc9c1 L |
1781 | /* We may need a .plt entry if the symbol is a function |
1782 | defined in a shared lib or is a STT_GNU_IFUNC function | |
1783 | referenced from the code or read-only section. */ | |
34bb2571 L |
1784 | if (!h->def_regular |
1785 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
233cc9c1 L |
1786 | h->plt.refcount += 1; |
1787 | ||
4b627c18 L |
1788 | if (r_type == R_386_PC32) |
1789 | { | |
1790 | /* Since something like ".long foo - ." may be used | |
1791 | as pointer, make sure that PLT is used if foo is | |
1792 | a function defined in a shared library. */ | |
1793 | if ((sec->flags & SEC_CODE) == 0) | |
1794 | h->pointer_equality_needed = 1; | |
74437ea2 L |
1795 | else if (h->type == STT_GNU_IFUNC |
1796 | && bfd_link_pic (info)) | |
1797 | { | |
6322e5c5 L |
1798 | _bfd_error_handler |
1799 | /* xgettext:c-format */ | |
1800 | (_("%B: unsupported non-PIC call to IFUNC `%s'"), | |
1801 | abfd, h->root.root.string); | |
74437ea2 L |
1802 | bfd_set_error (bfd_error_bad_value); |
1803 | goto error_return; | |
1804 | } | |
4b627c18 L |
1805 | } |
1806 | else | |
04ebc307 L |
1807 | { |
1808 | h->pointer_equality_needed = 1; | |
1809 | /* R_386_32 can be resolved at run-time. */ | |
1810 | if (r_type == R_386_32 | |
1811 | && (sec->flags & SEC_READONLY) == 0) | |
1812 | eh->func_pointer_refcount += 1; | |
1813 | } | |
6725bdbf | 1814 | } |
7843f00e | 1815 | |
06a6a421 | 1816 | size_reloc = FALSE; |
6a3e1bae | 1817 | do_size: |
daf1c414 L |
1818 | if (NEED_DYNAMIC_RELOCATION_P (info, h, sec, r_type, |
1819 | R_386_32)) | |
252b5132 | 1820 | { |
e03a8ed8 L |
1821 | struct elf_dyn_relocs *p; |
1822 | struct elf_dyn_relocs **head; | |
ec338859 | 1823 | |
12d0ee4a AM |
1824 | /* We must copy these reloc types into the output file. |
1825 | Create a reloc section in dynobj and make room for | |
1826 | this reloc. */ | |
252b5132 RH |
1827 | if (sreloc == NULL) |
1828 | { | |
83bac4b0 NC |
1829 | sreloc = _bfd_elf_make_dynamic_reloc_section |
1830 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE); | |
1831 | ||
252b5132 | 1832 | if (sreloc == NULL) |
c337a162 | 1833 | goto error_return; |
252b5132 RH |
1834 | } |
1835 | ||
0c715baa AM |
1836 | /* If this is a global symbol, we count the number of |
1837 | relocations we need for this symbol. */ | |
1838 | if (h != NULL) | |
252b5132 | 1839 | { |
d5597ebc | 1840 | head = &eh->dyn_relocs; |
0c715baa AM |
1841 | } |
1842 | else | |
1843 | { | |
ec338859 AM |
1844 | /* Track dynamic relocs needed for local syms too. |
1845 | We really need local syms available to do this | |
1846 | easily. Oh well. */ | |
87d72d41 | 1847 | void **vpp; |
ec338859 | 1848 | asection *s; |
87d72d41 AM |
1849 | |
1850 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1851 | abfd, r_symndx); | |
1852 | if (isym == NULL) | |
c337a162 | 1853 | goto error_return; |
87d72d41 AM |
1854 | |
1855 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
ec338859 | 1856 | if (s == NULL) |
87d72d41 | 1857 | s = sec; |
ec338859 | 1858 | |
e81d3500 | 1859 | vpp = &elf_section_data (s)->local_dynrel; |
e03a8ed8 | 1860 | head = (struct elf_dyn_relocs **)vpp; |
ec338859 AM |
1861 | } |
1862 | ||
1863 | p = *head; | |
1864 | if (p == NULL || p->sec != sec) | |
1865 | { | |
1866 | bfd_size_type amt = sizeof *p; | |
a50b1753 NC |
1867 | p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj, |
1868 | amt); | |
ec338859 | 1869 | if (p == NULL) |
c337a162 | 1870 | goto error_return; |
ec338859 AM |
1871 | p->next = *head; |
1872 | *head = p; | |
1873 | p->sec = sec; | |
1874 | p->count = 0; | |
1875 | p->pc_count = 0; | |
252b5132 | 1876 | } |
ec338859 AM |
1877 | |
1878 | p->count += 1; | |
06a6a421 L |
1879 | /* Count size relocation as PC-relative relocation. */ |
1880 | if (r_type == R_386_PC32 || size_reloc) | |
ec338859 | 1881 | p->pc_count += 1; |
252b5132 | 1882 | } |
252b5132 RH |
1883 | break; |
1884 | ||
1885 | /* This relocation describes the C++ object vtable hierarchy. | |
1886 | Reconstruct it for later use during GC. */ | |
1887 | case R_386_GNU_VTINHERIT: | |
d17e0c6e | 1888 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c337a162 | 1889 | goto error_return; |
252b5132 RH |
1890 | break; |
1891 | ||
1892 | /* This relocation describes which C++ vtable entries are actually | |
1893 | used. Record for later use during GC. */ | |
1894 | case R_386_GNU_VTENTRY: | |
c6aa130f MS |
1895 | BFD_ASSERT (h != NULL); |
1896 | if (h != NULL | |
1897 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) | |
c337a162 | 1898 | goto error_return; |
252b5132 RH |
1899 | break; |
1900 | ||
1901 | default: | |
1902 | break; | |
1903 | } | |
1904 | } | |
1905 | ||
bedfd056 L |
1906 | if (elf_section_data (sec)->this_hdr.contents != contents) |
1907 | { | |
5e5e02ae | 1908 | if (!converted && !info->keep_memory) |
bedfd056 L |
1909 | free (contents); |
1910 | else | |
1911 | { | |
5e5e02ae L |
1912 | /* Cache the section contents for elf_link_input_bfd if any |
1913 | load is converted or --no-keep-memory isn't used. */ | |
bedfd056 L |
1914 | elf_section_data (sec)->this_hdr.contents = contents; |
1915 | } | |
1916 | } | |
1917 | ||
5e5e02ae L |
1918 | /* Cache relocations if any load is converted. */ |
1919 | if (elf_section_data (sec)->relocs != relocs && converted) | |
1920 | elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs; | |
1921 | ||
b34976b6 | 1922 | return TRUE; |
c337a162 L |
1923 | |
1924 | error_return: | |
bedfd056 L |
1925 | if (elf_section_data (sec)->this_hdr.contents != contents) |
1926 | free (contents); | |
c337a162 L |
1927 | sec->check_relocs_failed = 1; |
1928 | return FALSE; | |
252b5132 RH |
1929 | } |
1930 | ||
38701953 AM |
1931 | /* Set the correct type for an x86 ELF section. We do this by the |
1932 | section name, which is a hack, but ought to work. */ | |
1933 | ||
b34976b6 | 1934 | static bfd_boolean |
55fd94b0 AM |
1935 | elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
1936 | Elf_Internal_Shdr *hdr, | |
1937 | asection *sec) | |
38701953 | 1938 | { |
91d6fa6a | 1939 | const char *name; |
38701953 AM |
1940 | |
1941 | name = bfd_get_section_name (abfd, sec); | |
1942 | ||
1943 | /* This is an ugly, but unfortunately necessary hack that is | |
1944 | needed when producing EFI binaries on x86. It tells | |
1945 | elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
1946 | containing ELF relocation info. We need this hack in order to | |
1947 | be able to generate ELF binaries that can be translated into | |
1948 | EFI applications (which are essentially COFF objects). Those | |
1949 | files contain a COFF ".reloc" section inside an ELFNN object, | |
1950 | which would normally cause BFD to segfault because it would | |
1951 | attempt to interpret this section as containing relocation | |
1952 | entries for section "oc". With this hack enabled, ".reloc" | |
1953 | will be treated as a normal data section, which will avoid the | |
1954 | segfault. However, you won't be able to create an ELFNN binary | |
1955 | with a section named "oc" that needs relocations, but that's | |
1956 | the kind of ugly side-effects you get when detecting section | |
1957 | types based on their names... In practice, this limitation is | |
1958 | unlikely to bite. */ | |
1959 | if (strcmp (name, ".reloc") == 0) | |
1960 | hdr->sh_type = SHT_PROGBITS; | |
1961 | ||
b34976b6 | 1962 | return TRUE; |
38701953 AM |
1963 | } |
1964 | ||
13ae64f3 JJ |
1965 | /* Return the relocation value for @tpoff relocation |
1966 | if STT_TLS virtual address is ADDRESS. */ | |
1967 | ||
1968 | static bfd_vma | |
eb4ff4d6 | 1969 | elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address) |
13ae64f3 | 1970 | { |
e1918d23 | 1971 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
1972 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
1973 | bfd_vma static_tls_size; | |
13ae64f3 | 1974 | |
e1918d23 AM |
1975 | /* If tls_sec is NULL, we should have signalled an error already. */ |
1976 | if (htab->tls_sec == NULL) | |
6a30718d | 1977 | return 0; |
7dc98aea RO |
1978 | |
1979 | /* Consider special static TLS alignment requirements. */ | |
1980 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
1981 | return static_tls_size + htab->tls_sec->vma - address; | |
13ae64f3 JJ |
1982 | } |
1983 | ||
252b5132 RH |
1984 | /* Relocate an i386 ELF section. */ |
1985 | ||
b34976b6 | 1986 | static bfd_boolean |
55fd94b0 AM |
1987 | elf_i386_relocate_section (bfd *output_bfd, |
1988 | struct bfd_link_info *info, | |
1989 | bfd *input_bfd, | |
1990 | asection *input_section, | |
1991 | bfd_byte *contents, | |
1992 | Elf_Internal_Rela *relocs, | |
1993 | Elf_Internal_Sym *local_syms, | |
1994 | asection **local_sections) | |
252b5132 | 1995 | { |
0afcef53 | 1996 | struct elf_x86_link_hash_table *htab; |
252b5132 RH |
1997 | Elf_Internal_Shdr *symtab_hdr; |
1998 | struct elf_link_hash_entry **sym_hashes; | |
1999 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2000 | bfd_vma *local_tlsdesc_gotents; |
252b5132 | 2001 | Elf_Internal_Rela *rel; |
60f2e42e | 2002 | Elf_Internal_Rela *wrel; |
252b5132 | 2003 | Elf_Internal_Rela *relend; |
3348747a | 2004 | bfd_boolean is_vxworks_tls; |
25e762b9 | 2005 | unsigned plt_entry_size; |
252b5132 | 2006 | |
c337a162 L |
2007 | /* Skip if check_relocs failed. */ |
2008 | if (input_section->check_relocs_failed) | |
2009 | return FALSE; | |
2010 | ||
0afcef53 | 2011 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 NC |
2012 | if (htab == NULL) |
2013 | return FALSE; | |
fe53b4a4 L |
2014 | |
2015 | BFD_ASSERT (is_x86_elf (input_bfd, htab)); | |
2016 | ||
0ffa91dd | 2017 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
252b5132 RH |
2018 | sym_hashes = elf_sym_hashes (input_bfd); |
2019 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
0afcef53 | 2020 | local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd); |
3348747a NS |
2021 | /* We have to handle relocations in vxworks .tls_vars sections |
2022 | specially, because the dynamic loader is 'weird'. */ | |
9a742a90 | 2023 | is_vxworks_tls = (htab->is_vxworks |
0e1862bb | 2024 | && bfd_link_pic (info) |
3348747a NS |
2025 | && !strcmp (input_section->output_section->name, |
2026 | ".tls_vars")); | |
252b5132 | 2027 | |
0afcef53 | 2028 | _bfd_x86_elf_set_tls_module_base (info); |
9f03412a | 2029 | |
765e526c | 2030 | plt_entry_size = htab->plt.plt_entry_size; |
25e762b9 | 2031 | |
60f2e42e | 2032 | rel = wrel = relocs; |
252b5132 | 2033 | relend = relocs + input_section->reloc_count; |
60f2e42e | 2034 | for (; rel < relend; wrel++, rel++) |
252b5132 | 2035 | { |
419414ea | 2036 | unsigned int r_type, r_type_tls; |
252b5132 RH |
2037 | reloc_howto_type *howto; |
2038 | unsigned long r_symndx; | |
2039 | struct elf_link_hash_entry *h; | |
0afcef53 | 2040 | struct elf_x86_link_hash_entry *eh; |
252b5132 RH |
2041 | Elf_Internal_Sym *sym; |
2042 | asection *sec; | |
dd7e64d4 | 2043 | bfd_vma off, offplt, plt_offset; |
252b5132 | 2044 | bfd_vma relocation; |
b34976b6 | 2045 | bfd_boolean unresolved_reloc; |
252b5132 | 2046 | bfd_reloc_status_type r; |
1b452ec6 | 2047 | unsigned int indx; |
13ae64f3 | 2048 | int tls_type; |
1788fc08 | 2049 | bfd_vma st_size; |
dd7e64d4 | 2050 | asection *resolved_plt; |
aec6b87e | 2051 | bfd_boolean resolved_to_zero; |
e133d005 | 2052 | bfd_boolean relative_reloc; |
252b5132 RH |
2053 | |
2054 | r_type = ELF32_R_TYPE (rel->r_info); | |
55fd94b0 AM |
2055 | if (r_type == R_386_GNU_VTINHERIT |
2056 | || r_type == R_386_GNU_VTENTRY) | |
18954b29 L |
2057 | { |
2058 | if (wrel != rel) | |
2059 | *wrel = *rel; | |
2060 | continue; | |
2061 | } | |
dc47f327 | 2062 | |
55fd94b0 | 2063 | if ((indx = r_type) >= R_386_standard |
13ae64f3 JJ |
2064 | && ((indx = r_type - R_386_ext_offset) - R_386_standard |
2065 | >= R_386_ext - R_386_standard) | |
2066 | && ((indx = r_type - R_386_tls_offset) - R_386_ext | |
c74be520 | 2067 | >= R_386_ext2 - R_386_ext)) |
47aeb64c NC |
2068 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
2069 | ||
1b452ec6 | 2070 | howto = elf_howto_table + indx; |
252b5132 RH |
2071 | |
2072 | r_symndx = ELF32_R_SYM (rel->r_info); | |
252b5132 RH |
2073 | h = NULL; |
2074 | sym = NULL; | |
2075 | sec = NULL; | |
b34976b6 | 2076 | unresolved_reloc = FALSE; |
252b5132 RH |
2077 | if (r_symndx < symtab_hdr->sh_info) |
2078 | { | |
2079 | sym = local_syms + r_symndx; | |
2080 | sec = local_sections[r_symndx]; | |
2081 | relocation = (sec->output_section->vma | |
2082 | + sec->output_offset | |
2083 | + sym->st_value); | |
1788fc08 | 2084 | st_size = sym->st_size; |
ab96bf03 AM |
2085 | |
2086 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
2087 | && ((sec->flags & SEC_MERGE) != 0 | |
0e1862bb | 2088 | || (bfd_link_relocatable (info) |
ab96bf03 | 2089 | && sec->output_offset != 0))) |
f8df10f4 | 2090 | { |
f8df10f4 | 2091 | bfd_vma addend; |
4a335f3d | 2092 | bfd_byte *where = contents + rel->r_offset; |
f8df10f4 | 2093 | |
4a335f3d | 2094 | switch (howto->size) |
f8df10f4 | 2095 | { |
4a335f3d AM |
2096 | case 0: |
2097 | addend = bfd_get_8 (input_bfd, where); | |
2098 | if (howto->pc_relative) | |
2099 | { | |
2100 | addend = (addend ^ 0x80) - 0x80; | |
2101 | addend += 1; | |
2102 | } | |
2103 | break; | |
2104 | case 1: | |
2105 | addend = bfd_get_16 (input_bfd, where); | |
2106 | if (howto->pc_relative) | |
2107 | { | |
2108 | addend = (addend ^ 0x8000) - 0x8000; | |
2109 | addend += 2; | |
2110 | } | |
2111 | break; | |
2112 | case 2: | |
2113 | addend = bfd_get_32 (input_bfd, where); | |
2114 | if (howto->pc_relative) | |
2115 | { | |
2116 | addend = (addend ^ 0x80000000) - 0x80000000; | |
2117 | addend += 4; | |
2118 | } | |
2119 | break; | |
2120 | default: | |
2121 | abort (); | |
f8df10f4 JJ |
2122 | } |
2123 | ||
0e1862bb | 2124 | if (bfd_link_relocatable (info)) |
ab96bf03 AM |
2125 | addend += sec->output_offset; |
2126 | else | |
2127 | { | |
2128 | asection *msec = sec; | |
2129 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, | |
2130 | addend); | |
2131 | addend -= relocation; | |
2132 | addend += msec->output_section->vma + msec->output_offset; | |
2133 | } | |
4a335f3d AM |
2134 | |
2135 | switch (howto->size) | |
2136 | { | |
2137 | case 0: | |
16a10388 | 2138 | /* FIXME: overflow checks. */ |
4a335f3d AM |
2139 | if (howto->pc_relative) |
2140 | addend -= 1; | |
2141 | bfd_put_8 (input_bfd, addend, where); | |
4a335f3d AM |
2142 | break; |
2143 | case 1: | |
2144 | if (howto->pc_relative) | |
2145 | addend -= 2; | |
2146 | bfd_put_16 (input_bfd, addend, where); | |
4a335f3d AM |
2147 | break; |
2148 | case 2: | |
2149 | if (howto->pc_relative) | |
2150 | addend -= 4; | |
2151 | bfd_put_32 (input_bfd, addend, where); | |
2152 | break; | |
2153 | } | |
f8df10f4 | 2154 | } |
0e1862bb | 2155 | else if (!bfd_link_relocatable (info) |
1f85278f | 2156 | && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc L |
2157 | { |
2158 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0afcef53 L |
2159 | h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel, |
2160 | FALSE); | |
c25bc9fc L |
2161 | if (h == NULL) |
2162 | abort (); | |
2163 | ||
23209a78 | 2164 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
2165 | h->root.u.def.value = sym->st_value; |
2166 | h->root.u.def.section = sec; | |
2167 | } | |
252b5132 RH |
2168 | } |
2169 | else | |
2170 | { | |
3d540e93 | 2171 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 2172 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
ffb2e45b | 2173 | |
b2a8e766 AM |
2174 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2175 | r_symndx, symtab_hdr, sym_hashes, | |
2176 | h, sec, relocation, | |
62d887d4 | 2177 | unresolved_reloc, warned, ignored); |
1788fc08 | 2178 | st_size = h->size; |
252b5132 RH |
2179 | } |
2180 | ||
dbaa2011 | 2181 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
2182 | { |
2183 | _bfd_clear_contents (howto, input_bfd, input_section, | |
2184 | contents + rel->r_offset); | |
2185 | wrel->r_offset = rel->r_offset; | |
2186 | wrel->r_info = 0; | |
2187 | wrel->r_addend = 0; | |
2188 | ||
2189 | /* For ld -r, remove relocations in debug sections against | |
2190 | sections defined in discarded sections. Not done for | |
2191 | eh_frame editing code expects to be present. */ | |
2192 | if (bfd_link_relocatable (info) | |
2193 | && (input_section->flags & SEC_DEBUGGING)) | |
2194 | wrel--; | |
2195 | ||
2196 | continue; | |
2197 | } | |
9635fe29 | 2198 | |
0e1862bb | 2199 | if (bfd_link_relocatable (info)) |
2d5da473 L |
2200 | { |
2201 | if (wrel != rel) | |
2202 | *wrel = *rel; | |
2203 | continue; | |
2204 | } | |
ab96bf03 | 2205 | |
0afcef53 | 2206 | eh = (struct elf_x86_link_hash_entry *) h; |
ee2fdd6f | 2207 | |
cbe950e9 L |
2208 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
2209 | it here if it is defined in a non-shared object. */ | |
2210 | if (h != NULL | |
2211 | && h->type == STT_GNU_IFUNC | |
2212 | && h->def_regular) | |
2213 | { | |
ee2fdd6f | 2214 | asection *gotplt, *base_got; |
cbe950e9 | 2215 | bfd_vma plt_index; |
4c544807 | 2216 | const char *name; |
cbe950e9 | 2217 | |
97dc35c8 L |
2218 | if ((input_section->flags & SEC_ALLOC) == 0) |
2219 | { | |
2220 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
2221 | sections because such sections are not SEC_ALLOC and | |
2222 | thus ld.so will not process them. */ | |
2223 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 2224 | continue; |
97dc35c8 L |
2225 | abort (); |
2226 | } | |
cbe950e9 L |
2227 | |
2228 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 2229 | if (htab->elf.splt != NULL) |
cbe950e9 | 2230 | { |
ee2fdd6f L |
2231 | if (htab->plt_second != NULL) |
2232 | { | |
2233 | resolved_plt = htab->plt_second; | |
2234 | plt_offset = eh->plt_second.offset; | |
2235 | } | |
2236 | else | |
2237 | { | |
2238 | resolved_plt = htab->elf.splt; | |
2239 | plt_offset = h->plt.offset; | |
2240 | } | |
6de2ae4a | 2241 | gotplt = htab->elf.sgotplt; |
cbe950e9 L |
2242 | } |
2243 | else | |
2244 | { | |
ee2fdd6f L |
2245 | resolved_plt = htab->elf.iplt; |
2246 | plt_offset = h->plt.offset; | |
6de2ae4a | 2247 | gotplt = htab->elf.igotplt; |
cbe950e9 L |
2248 | } |
2249 | ||
cbe950e9 L |
2250 | switch (r_type) |
2251 | { | |
2252 | default: | |
233cc9c1 | 2253 | break; |
cbe950e9 L |
2254 | |
2255 | case R_386_GOT32: | |
02a86693 | 2256 | case R_386_GOT32X: |
6de2ae4a | 2257 | base_got = htab->elf.sgot; |
cbe950e9 L |
2258 | off = h->got.offset; |
2259 | ||
7afd84dc | 2260 | if (base_got == NULL) |
cbe950e9 L |
2261 | abort (); |
2262 | ||
7afd84dc | 2263 | if (off == (bfd_vma) -1) |
cbe950e9 | 2264 | { |
7afd84dc L |
2265 | /* We can't use h->got.offset here to save state, or |
2266 | even just remember the offset, as finish_dynamic_symbol | |
2267 | would use that as offset into .got. */ | |
6bbec505 | 2268 | |
233cc9c1 L |
2269 | if (h->plt.offset == (bfd_vma) -1) |
2270 | abort (); | |
2271 | ||
6de2ae4a | 2272 | if (htab->elf.splt != NULL) |
7afd84dc | 2273 | { |
f604c2a2 | 2274 | plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2275 | - htab->plt.has_plt0); |
7afd84dc | 2276 | off = (plt_index + 3) * 4; |
6de2ae4a | 2277 | base_got = htab->elf.sgotplt; |
7afd84dc | 2278 | } |
cbe950e9 L |
2279 | else |
2280 | { | |
25e762b9 | 2281 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 2282 | off = plt_index * 4; |
6de2ae4a | 2283 | base_got = htab->elf.igotplt; |
7afd84dc L |
2284 | } |
2285 | ||
2286 | if (h->dynindx == -1 | |
2287 | || h->forced_local | |
2288 | || info->symbolic) | |
2289 | { | |
2290 | /* This references the local defitionion. We must | |
2291 | initialize this entry in the global offset table. | |
2292 | Since the offset must always be a multiple of 8, | |
2293 | we use the least significant bit to record | |
2294 | whether we have initialized it already. | |
2295 | ||
2296 | When doing a dynamic link, we create a .rela.got | |
2297 | relocation entry to initialize the value. This | |
2298 | is done in the finish_dynamic_symbol routine. */ | |
2299 | if ((off & 1) != 0) | |
2300 | off &= ~1; | |
2301 | else | |
2302 | { | |
2303 | bfd_put_32 (output_bfd, relocation, | |
2304 | base_got->contents + off); | |
2305 | h->got.offset |= 1; | |
2306 | } | |
cbe950e9 | 2307 | } |
cbe950e9 | 2308 | |
7afd84dc | 2309 | relocation = off; |
7afd84dc L |
2310 | } |
2311 | else | |
ca8c86ef L |
2312 | relocation = (base_got->output_section->vma |
2313 | + base_got->output_offset + off | |
2314 | - gotplt->output_section->vma | |
2315 | - gotplt->output_offset); | |
2316 | ||
2a568401 L |
2317 | if (rel->r_offset > 1 |
2318 | && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5 | |
2319 | && *(contents + rel->r_offset - 2) != 0x8d) | |
712ec279 L |
2320 | { |
2321 | if (bfd_link_pic (info)) | |
2322 | goto disallow_got32; | |
2323 | ||
2324 | /* Add the GOT base if there is no base register. */ | |
2325 | relocation += (gotplt->output_section->vma | |
2326 | + gotplt->output_offset); | |
2327 | } | |
2328 | else if (htab->elf.splt == NULL) | |
2329 | { | |
2330 | /* Adjust for static executables. */ | |
2331 | relocation += gotplt->output_offset; | |
2332 | } | |
0018b0a3 | 2333 | |
cbe950e9 | 2334 | goto do_relocation; |
233cc9c1 L |
2335 | } |
2336 | ||
2337 | if (h->plt.offset == (bfd_vma) -1) | |
2338 | { | |
2339 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
2340 | if (r_type == R_386_32 | |
2341 | && (input_section->flags & SEC_CODE) == 0) | |
2342 | goto do_ifunc_pointer; | |
2343 | goto bad_ifunc_reloc; | |
2344 | } | |
2345 | ||
ee2fdd6f L |
2346 | relocation = (resolved_plt->output_section->vma |
2347 | + resolved_plt->output_offset + plt_offset); | |
233cc9c1 L |
2348 | |
2349 | switch (r_type) | |
2350 | { | |
2351 | default: | |
2352 | bad_ifunc_reloc: | |
2353 | if (h->root.root.string) | |
2354 | name = h->root.root.string; | |
2355 | else | |
2356 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
2357 | NULL); | |
4eca0228 | 2358 | _bfd_error_handler |
695344c0 | 2359 | /* xgettext:c-format */ |
233cc9c1 L |
2360 | (_("%B: relocation %s against STT_GNU_IFUNC " |
2361 | "symbol `%s' isn't supported"), input_bfd, | |
2362 | howto->name, name); | |
2363 | bfd_set_error (bfd_error_bad_value); | |
2364 | return FALSE; | |
2365 | ||
2366 | case R_386_32: | |
2367 | /* Generate dynamic relcoation only when there is a | |
2368 | non-GOT reference in a shared object. */ | |
2369 | if ((bfd_link_pic (info) && h->non_got_ref) | |
2370 | || h->plt.offset == (bfd_vma) -1) | |
2371 | { | |
2372 | Elf_Internal_Rela outrel; | |
2373 | asection *sreloc; | |
2374 | bfd_vma offset; | |
2375 | ||
2376 | do_ifunc_pointer: | |
2377 | /* Need a dynamic relocation to get the real function | |
2378 | adddress. */ | |
2379 | offset = _bfd_elf_section_offset (output_bfd, | |
2380 | info, | |
2381 | input_section, | |
2382 | rel->r_offset); | |
2383 | if (offset == (bfd_vma) -1 | |
2384 | || offset == (bfd_vma) -2) | |
2385 | abort (); | |
2386 | ||
2387 | outrel.r_offset = (input_section->output_section->vma | |
2388 | + input_section->output_offset | |
2389 | + offset); | |
2390 | ||
cf1070f1 | 2391 | if (POINTER_LOCAL_IFUNC_P (info, h)) |
233cc9c1 | 2392 | { |
6322e5c5 L |
2393 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
2394 | h->root.root.string, | |
2395 | h->root.u.def.section->owner); | |
2396 | ||
233cc9c1 L |
2397 | /* This symbol is resolved locally. */ |
2398 | outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
2399 | bfd_put_32 (output_bfd, | |
2400 | (h->root.u.def.value | |
2401 | + h->root.u.def.section->output_section->vma | |
2402 | + h->root.u.def.section->output_offset), | |
2403 | contents + offset); | |
2404 | } | |
2405 | else | |
2406 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
2407 | ||
2408 | /* Dynamic relocations are stored in | |
2409 | 1. .rel.ifunc section in PIC object. | |
2410 | 2. .rel.got section in dynamic executable. | |
2411 | 3. .rel.iplt section in static executable. */ | |
2412 | if (bfd_link_pic (info)) | |
2413 | sreloc = htab->elf.irelifunc; | |
2414 | else if (htab->elf.splt != NULL) | |
2415 | sreloc = htab->elf.srelgot; | |
2416 | else | |
2417 | sreloc = htab->elf.irelplt; | |
2418 | elf_append_rel (output_bfd, sreloc, &outrel); | |
2419 | ||
2420 | /* If this reloc is against an external symbol, we | |
2421 | do not want to fiddle with the addend. Otherwise, | |
2422 | we need to include the symbol value so that it | |
2423 | becomes an addend for the dynamic reloc. For an | |
2424 | internal symbol, we have updated addend. */ | |
2425 | continue; | |
2426 | } | |
2427 | /* FALLTHROUGH */ | |
2428 | case R_386_PC32: | |
2429 | case R_386_PLT32: | |
2430 | goto do_relocation; | |
cbe950e9 L |
2431 | |
2432 | case R_386_GOTOFF: | |
2433 | relocation -= (gotplt->output_section->vma | |
2434 | + gotplt->output_offset); | |
2435 | goto do_relocation; | |
2436 | } | |
2437 | } | |
2438 | ||
aec6b87e | 2439 | resolved_to_zero = (eh != NULL |
c5bce5c6 | 2440 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh)); |
aec6b87e | 2441 | |
252b5132 RH |
2442 | switch (r_type) |
2443 | { | |
02a86693 L |
2444 | case R_386_GOT32X: |
2445 | /* Avoid optimizing _DYNAMIC since ld.so may use its | |
2446 | link-time address. */ | |
2447 | if (h == htab->elf.hdynamic) | |
2448 | goto r_386_got32; | |
2449 | ||
2450 | if (bfd_link_pic (info)) | |
2451 | { | |
2452 | /* It is OK to convert mov to lea and convert indirect | |
2453 | branch to direct branch. It is OK to convert adc, | |
2454 | add, and, cmp, or, sbb, sub, test, xor only when PIC | |
2455 | is false. */ | |
02e2aef8 L |
2456 | unsigned int opcode, addend; |
2457 | addend = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2458 | if (addend != 0) | |
2459 | goto r_386_got32; | |
2460 | opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
02a86693 L |
2461 | if (opcode != 0x8b && opcode != 0xff) |
2462 | goto r_386_got32; | |
2463 | } | |
2464 | ||
2465 | /* Resolve "mov GOT[(%reg)], %reg", | |
2466 | "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]" | |
2467 | and "binop foo@GOT[(%reg)], %reg". */ | |
2468 | if (h == NULL | |
2469 | || (h->plt.offset == (bfd_vma) -1 | |
2470 | && h->got.offset == (bfd_vma) -1) | |
2471 | || htab->elf.sgotplt == NULL) | |
2472 | abort (); | |
2473 | ||
2474 | offplt = (htab->elf.sgotplt->output_section->vma | |
2475 | + htab->elf.sgotplt->output_offset); | |
2476 | ||
2477 | /* It is relative to .got.plt section. */ | |
2478 | if (h->got.offset != (bfd_vma) -1) | |
32875eb1 L |
2479 | /* Use GOT entry. Mask off the least significant bit in |
2480 | GOT offset which may be set by R_386_GOT32 processing | |
2481 | below. */ | |
02a86693 L |
2482 | relocation = (htab->elf.sgot->output_section->vma |
2483 | + htab->elf.sgot->output_offset | |
32875eb1 | 2484 | + (h->got.offset & ~1) - offplt); |
02a86693 L |
2485 | else |
2486 | /* Use GOTPLT entry. */ | |
f604c2a2 | 2487 | relocation = (h->plt.offset / plt_entry_size |
765e526c | 2488 | - htab->plt.has_plt0 + 3) * 4; |
02a86693 L |
2489 | |
2490 | if (!bfd_link_pic (info)) | |
2491 | { | |
2492 | /* If not PIC, add the .got.plt section address for | |
a3718e9e | 2493 | baseless addressing. */ |
02a86693 | 2494 | unsigned int modrm; |
02e2aef8 | 2495 | modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
02a86693 L |
2496 | if ((modrm & 0xc7) == 0x5) |
2497 | relocation += offplt; | |
2498 | } | |
2499 | ||
2500 | unresolved_reloc = FALSE; | |
2501 | break; | |
2502 | ||
252b5132 | 2503 | case R_386_GOT32: |
02a86693 | 2504 | r_386_got32: |
252b5132 RH |
2505 | /* Relocation is to the entry for this symbol in the global |
2506 | offset table. */ | |
6de2ae4a | 2507 | if (htab->elf.sgot == NULL) |
ffb2e45b | 2508 | abort (); |
252b5132 | 2509 | |
e133d005 | 2510 | relative_reloc = FALSE; |
252b5132 RH |
2511 | if (h != NULL) |
2512 | { | |
252b5132 | 2513 | off = h->got.offset; |
2eba97c2 | 2514 | if (RESOLVED_LOCALLY_P (info, h, htab)) |
252b5132 | 2515 | { |
2eba97c2 L |
2516 | /* We must initialize this entry in the global offset |
2517 | table. Since the offset must always be a multiple | |
2518 | of 4, we use the least significant bit to record | |
2519 | whether we have initialized it already. | |
252b5132 RH |
2520 | |
2521 | When doing a dynamic link, we create a .rel.got | |
2522 | relocation entry to initialize the value. This | |
2523 | is done in the finish_dynamic_symbol routine. */ | |
2524 | if ((off & 1) != 0) | |
2525 | off &= ~1; | |
2526 | else | |
2527 | { | |
2528 | bfd_put_32 (output_bfd, relocation, | |
6de2ae4a | 2529 | htab->elf.sgot->contents + off); |
252b5132 | 2530 | h->got.offset |= 1; |
e133d005 | 2531 | |
f70656b2 | 2532 | if (GENERATE_RELATIVE_RELOC_P (info, h)) |
e133d005 L |
2533 | { |
2534 | /* PR ld/21402: If this symbol isn't dynamic | |
0dc9a308 | 2535 | in PIC, generate R_386_RELATIVE here. */ |
e133d005 L |
2536 | eh->no_finish_dynamic_symbol = 1; |
2537 | relative_reloc = TRUE; | |
2538 | } | |
252b5132 RH |
2539 | } |
2540 | } | |
8c694914 | 2541 | else |
b34976b6 | 2542 | unresolved_reloc = FALSE; |
252b5132 RH |
2543 | } |
2544 | else | |
2545 | { | |
ffb2e45b AM |
2546 | if (local_got_offsets == NULL) |
2547 | abort (); | |
252b5132 RH |
2548 | |
2549 | off = local_got_offsets[r_symndx]; | |
2550 | ||
2551 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
2552 | the least significant bit to record whether we have |
2553 | already generated the necessary reloc. */ | |
252b5132 RH |
2554 | if ((off & 1) != 0) |
2555 | off &= ~1; | |
2556 | else | |
2557 | { | |
6725bdbf | 2558 | bfd_put_32 (output_bfd, relocation, |
6de2ae4a | 2559 | htab->elf.sgot->contents + off); |
e133d005 | 2560 | local_got_offsets[r_symndx] |= 1; |
252b5132 | 2561 | |
0e1862bb | 2562 | if (bfd_link_pic (info)) |
e133d005 | 2563 | relative_reloc = TRUE; |
252b5132 | 2564 | } |
252b5132 RH |
2565 | } |
2566 | ||
e133d005 L |
2567 | if (relative_reloc) |
2568 | { | |
2569 | asection *s; | |
2570 | Elf_Internal_Rela outrel; | |
2571 | ||
2572 | s = htab->elf.srelgot; | |
2573 | if (s == NULL) | |
2574 | abort (); | |
2575 | ||
2576 | outrel.r_offset = (htab->elf.sgot->output_section->vma | |
2577 | + htab->elf.sgot->output_offset | |
2578 | + off); | |
2579 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
2580 | elf_append_rel (output_bfd, s, &outrel); | |
2581 | } | |
2582 | ||
ffb2e45b AM |
2583 | if (off >= (bfd_vma) -2) |
2584 | abort (); | |
2585 | ||
74d7f0aa L |
2586 | relocation = (htab->elf.sgot->output_section->vma |
2587 | + htab->elf.sgot->output_offset + off); | |
2a568401 L |
2588 | if (rel->r_offset > 1 |
2589 | && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5 | |
2590 | && *(contents + rel->r_offset - 2) != 0x8d) | |
74d7f0aa L |
2591 | { |
2592 | if (bfd_link_pic (info)) | |
2593 | { | |
2594 | /* For PIC, disallow R_386_GOT32 without a base | |
2a568401 L |
2595 | register, except for "lea foo@GOT, %reg", since |
2596 | we don't know what the GOT base is. */ | |
74d7f0aa L |
2597 | const char *name; |
2598 | ||
712ec279 | 2599 | disallow_got32: |
a5def14f | 2600 | if (h == NULL || h->root.root.string == NULL) |
74d7f0aa L |
2601 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, |
2602 | NULL); | |
2603 | else | |
2604 | name = h->root.root.string; | |
2605 | ||
4eca0228 | 2606 | _bfd_error_handler |
695344c0 | 2607 | /* xgettext:c-format */ |
63a5468a AM |
2608 | (_("%B: direct GOT relocation %s against `%s'" |
2609 | " without base register can not be used" | |
2610 | " when making a shared object"), | |
712ec279 | 2611 | input_bfd, howto->name, name); |
74d7f0aa L |
2612 | bfd_set_error (bfd_error_bad_value); |
2613 | return FALSE; | |
2614 | } | |
2615 | } | |
2616 | else | |
2617 | { | |
2618 | /* Subtract the .got.plt section address only with a base | |
2619 | register. */ | |
2620 | relocation -= (htab->elf.sgotplt->output_section->vma | |
2621 | + htab->elf.sgotplt->output_offset); | |
2622 | } | |
2623 | ||
252b5132 RH |
2624 | break; |
2625 | ||
2626 | case R_386_GOTOFF: | |
2627 | /* Relocation is relative to the start of the global offset | |
2628 | table. */ | |
2629 | ||
3d949995 L |
2630 | /* Check to make sure it isn't a protected function or data |
2631 | symbol for shared library since it may not be local when | |
2632 | used as function address or with copy relocation. We also | |
e3c0e327 | 2633 | need to make sure that a symbol is referenced locally. */ |
0e1862bb | 2634 | if (!bfd_link_executable (info) && h) |
90f487df | 2635 | { |
41bed6dd L |
2636 | if (!h->def_regular) |
2637 | { | |
2638 | const char *v; | |
2639 | ||
2640 | switch (ELF_ST_VISIBILITY (h->other)) | |
2641 | { | |
2642 | case STV_HIDDEN: | |
2643 | v = _("hidden symbol"); | |
2644 | break; | |
2645 | case STV_INTERNAL: | |
2646 | v = _("internal symbol"); | |
2647 | break; | |
2648 | case STV_PROTECTED: | |
2649 | v = _("protected symbol"); | |
2650 | break; | |
2651 | default: | |
2652 | v = _("symbol"); | |
2653 | break; | |
2654 | } | |
2655 | ||
4eca0228 | 2656 | _bfd_error_handler |
695344c0 | 2657 | /* xgettext:c-format */ |
63a5468a AM |
2658 | (_("%B: relocation R_386_GOTOFF against undefined %s" |
2659 | " `%s' can not be used when making a shared object"), | |
41bed6dd L |
2660 | input_bfd, v, h->root.root.string); |
2661 | bfd_set_error (bfd_error_bad_value); | |
2662 | return FALSE; | |
2663 | } | |
6999821f | 2664 | else if (!SYMBOL_REFERENCES_LOCAL_P (info, h) |
3d949995 L |
2665 | && (h->type == STT_FUNC |
2666 | || h->type == STT_OBJECT) | |
41bed6dd L |
2667 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) |
2668 | { | |
4eca0228 | 2669 | _bfd_error_handler |
695344c0 | 2670 | /* xgettext:c-format */ |
63a5468a AM |
2671 | (_("%B: relocation R_386_GOTOFF against protected %s" |
2672 | " `%s' can not be used when making a shared object"), | |
3d949995 L |
2673 | input_bfd, |
2674 | h->type == STT_FUNC ? "function" : "data", | |
2675 | h->root.root.string); | |
41bed6dd L |
2676 | bfd_set_error (bfd_error_bad_value); |
2677 | return FALSE; | |
2678 | } | |
90f487df L |
2679 | } |
2680 | ||
8c37241b JJ |
2681 | /* Note that sgot is not involved in this |
2682 | calculation. We always want the start of .got.plt. If we | |
2683 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
252b5132 RH |
2684 | permitted by the ABI, we might have to change this |
2685 | calculation. */ | |
6de2ae4a L |
2686 | relocation -= htab->elf.sgotplt->output_section->vma |
2687 | + htab->elf.sgotplt->output_offset; | |
252b5132 RH |
2688 | break; |
2689 | ||
2690 | case R_386_GOTPC: | |
2691 | /* Use global offset table as symbol value. */ | |
6de2ae4a L |
2692 | relocation = htab->elf.sgotplt->output_section->vma |
2693 | + htab->elf.sgotplt->output_offset; | |
b34976b6 | 2694 | unresolved_reloc = FALSE; |
252b5132 RH |
2695 | break; |
2696 | ||
2697 | case R_386_PLT32: | |
2698 | /* Relocation is to the entry for this symbol in the | |
2699 | procedure linkage table. */ | |
2700 | ||
dd5724d5 | 2701 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 2702 | without using the procedure linkage table. */ |
252b5132 RH |
2703 | if (h == NULL) |
2704 | break; | |
2705 | ||
dd7e64d4 L |
2706 | if ((h->plt.offset == (bfd_vma) -1 |
2707 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 2708 | || htab->elf.splt == NULL) |
252b5132 RH |
2709 | { |
2710 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
2711 | happens when statically linking PIC code, or when |
2712 | using -Bsymbolic. */ | |
252b5132 RH |
2713 | break; |
2714 | } | |
2715 | ||
dd7e64d4 L |
2716 | if (h->plt.offset != (bfd_vma) -1) |
2717 | { | |
ee2fdd6f L |
2718 | if (htab->plt_second != NULL) |
2719 | { | |
2720 | resolved_plt = htab->plt_second; | |
2721 | plt_offset = eh->plt_second.offset; | |
2722 | } | |
2723 | else | |
2724 | { | |
2725 | resolved_plt = htab->elf.splt; | |
2726 | plt_offset = h->plt.offset; | |
2727 | } | |
dd7e64d4 L |
2728 | } |
2729 | else | |
2730 | { | |
2731 | resolved_plt = htab->plt_got; | |
2732 | plt_offset = eh->plt_got.offset; | |
2733 | } | |
2734 | ||
2735 | relocation = (resolved_plt->output_section->vma | |
2736 | + resolved_plt->output_offset | |
2737 | + plt_offset); | |
b34976b6 | 2738 | unresolved_reloc = FALSE; |
252b5132 RH |
2739 | break; |
2740 | ||
1788fc08 | 2741 | case R_386_SIZE32: |
1788fc08 L |
2742 | /* Set to symbol size. */ |
2743 | relocation = st_size; | |
2744 | /* Fall through. */ | |
2745 | ||
252b5132 RH |
2746 | case R_386_32: |
2747 | case R_386_PC32: | |
3348747a NS |
2748 | if ((input_section->flags & SEC_ALLOC) == 0 |
2749 | || is_vxworks_tls) | |
ec338859 AM |
2750 | break; |
2751 | ||
aec6b87e L |
2752 | /* Copy dynamic function pointer relocations. Don't generate |
2753 | dynamic relocations against resolved undefined weak symbols | |
2754 | in PIE, except for R_386_PC32. */ | |
0e1862bb | 2755 | if ((bfd_link_pic (info) |
ef5aade5 | 2756 | && (h == NULL |
aec6b87e L |
2757 | || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
2758 | && (!resolved_to_zero | |
2759 | || r_type == R_386_PC32)) | |
2760 | || h->root.type != bfd_link_hash_undefweak)) | |
1788fc08 | 2761 | && ((r_type != R_386_PC32 && r_type != R_386_SIZE32) |
f6c52c13 | 2762 | || !SYMBOL_CALLS_LOCAL (info, h))) |
a23b6845 | 2763 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 2764 | && !bfd_link_pic (info) |
12d0ee4a AM |
2765 | && h != NULL |
2766 | && h->dynindx != -1 | |
aec6b87e L |
2767 | && (!h->non_got_ref |
2768 | || eh->func_pointer_refcount > 0 | |
2769 | || (h->root.type == bfd_link_hash_undefweak | |
2770 | && !resolved_to_zero)) | |
bae420ef L |
2771 | && ((h->def_dynamic && !h->def_regular) |
2772 | /* Undefined weak symbol is bound locally when | |
2773 | PIC is false. */ | |
2774 | || h->root.type == bfd_link_hash_undefweak))) | |
252b5132 | 2775 | { |
947216bf | 2776 | Elf_Internal_Rela outrel; |
b34976b6 | 2777 | bfd_boolean skip, relocate; |
0c715baa | 2778 | asection *sreloc; |
252b5132 RH |
2779 | |
2780 | /* When generating a shared object, these relocations | |
2781 | are copied into the output file to be resolved at run | |
2782 | time. */ | |
2783 | ||
b34976b6 AM |
2784 | skip = FALSE; |
2785 | relocate = FALSE; | |
252b5132 | 2786 | |
c629eae0 JJ |
2787 | outrel.r_offset = |
2788 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2789 | rel->r_offset); | |
2790 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 2791 | skip = TRUE; |
0bb2d96a | 2792 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2793 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
2794 | outrel.r_offset += (input_section->output_section->vma |
2795 | + input_section->output_offset); | |
2796 | ||
2797 | if (skip) | |
0bb2d96a | 2798 | memset (&outrel, 0, sizeof outrel); |
5a15f56f AM |
2799 | else if (h != NULL |
2800 | && h->dynindx != -1 | |
2801 | && (r_type == R_386_PC32 | |
4e0c91e4 L |
2802 | || !(bfd_link_executable (info) |
2803 | || SYMBOLIC_BIND (info, h)) | |
f5385ebf | 2804 | || !h->def_regular)) |
0bb2d96a | 2805 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
2806 | else |
2807 | { | |
5a15f56f | 2808 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 2809 | relocate = TRUE; |
5a15f56f | 2810 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
252b5132 RH |
2811 | } |
2812 | ||
cbe950e9 | 2813 | sreloc = elf_section_data (input_section)->sreloc; |
e7c33416 | 2814 | |
62d78908 L |
2815 | if (sreloc == NULL || sreloc->contents == NULL) |
2816 | { | |
2817 | r = bfd_reloc_notsupported; | |
2818 | goto check_relocation_error; | |
2819 | } | |
0c715baa | 2820 | |
59d6ffb2 | 2821 | elf_append_rel (output_bfd, sreloc, &outrel); |
252b5132 RH |
2822 | |
2823 | /* If this reloc is against an external symbol, we do | |
2824 | not want to fiddle with the addend. Otherwise, we | |
2825 | need to include the symbol value so that it becomes | |
2826 | an addend for the dynamic reloc. */ | |
0f88be7a | 2827 | if (! relocate) |
252b5132 RH |
2828 | continue; |
2829 | } | |
252b5132 RH |
2830 | break; |
2831 | ||
37e55690 | 2832 | case R_386_TLS_IE: |
0e1862bb | 2833 | if (!bfd_link_executable (info)) |
37e55690 | 2834 | { |
947216bf | 2835 | Elf_Internal_Rela outrel; |
37e55690 | 2836 | asection *sreloc; |
37e55690 JJ |
2837 | |
2838 | outrel.r_offset = rel->r_offset | |
2839 | + input_section->output_section->vma | |
2840 | + input_section->output_offset; | |
2841 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
2842 | sreloc = elf_section_data (input_section)->sreloc; | |
2843 | if (sreloc == NULL) | |
2844 | abort (); | |
59d6ffb2 | 2845 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
2846 | } |
2847 | /* Fall through */ | |
2848 | ||
13ae64f3 | 2849 | case R_386_TLS_GD: |
67a4f2b7 AO |
2850 | case R_386_TLS_GOTDESC: |
2851 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 2852 | case R_386_TLS_IE_32: |
37e55690 | 2853 | case R_386_TLS_GOTIE: |
13ae64f3 JJ |
2854 | tls_type = GOT_UNKNOWN; |
2855 | if (h == NULL && local_got_offsets) | |
0afcef53 | 2856 | tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx]; |
13ae64f3 | 2857 | else if (h != NULL) |
0afcef53 | 2858 | tls_type = elf_x86_hash_entry(h)->tls_type; |
37e55690 JJ |
2859 | if (tls_type == GOT_TLS_IE) |
2860 | tls_type = GOT_TLS_IE_NEG; | |
142411ca | 2861 | |
419414ea | 2862 | r_type_tls = r_type; |
142411ca L |
2863 | if (! elf_i386_tls_transition (info, input_bfd, |
2864 | input_section, contents, | |
2865 | symtab_hdr, sym_hashes, | |
419414ea | 2866 | &r_type_tls, tls_type, rel, |
bedfd056 | 2867 | relend, h, r_symndx, TRUE)) |
142411ca | 2868 | return FALSE; |
13ae64f3 | 2869 | |
419414ea | 2870 | if (r_type_tls == R_386_TLS_LE_32) |
13ae64f3 | 2871 | { |
82e51918 | 2872 | BFD_ASSERT (! unresolved_reloc); |
419414ea | 2873 | if (r_type == R_386_TLS_GD) |
13ae64f3 | 2874 | { |
142411ca | 2875 | unsigned int type; |
13ae64f3 JJ |
2876 | bfd_vma roff; |
2877 | ||
2878 | /* GD->LE transition. */ | |
6eaa7fb5 | 2879 | type = *(contents + rel->r_offset - 2); |
13ae64f3 JJ |
2880 | if (type == 0x04) |
2881 | { | |
6eaa7fb5 L |
2882 | /* Change |
2883 | leal foo@tlsgd(,%ebx,1), %eax | |
2884 | call ___tls_get_addr@PLT | |
2885 | into: | |
2886 | movl %gs:0, %eax | |
2887 | subl $foo@tpoff, %eax | |
13ae64f3 | 2888 | (6 byte form of subl). */ |
142411ca | 2889 | roff = rel->r_offset + 5; |
13ae64f3 JJ |
2890 | } |
2891 | else | |
2892 | { | |
6eaa7fb5 L |
2893 | /* Change |
2894 | leal foo@tlsgd(%ebx), %eax | |
2895 | call ___tls_get_addr@PLT | |
2896 | nop | |
2897 | or | |
2898 | leal foo@tlsgd(%reg), %eax | |
2899 | call *___tls_get_addr@GOT(%reg) | |
2900 | which may be converted to | |
2901 | addr32 call ___tls_get_addr | |
2902 | into: | |
2903 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
142411ca | 2904 | (6 byte form of subl). */ |
142411ca | 2905 | roff = rel->r_offset + 6; |
13ae64f3 | 2906 | } |
6eaa7fb5 L |
2907 | memcpy (contents + roff - 8, |
2908 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
eb4ff4d6 | 2909 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
13ae64f3 | 2910 | contents + roff); |
6eaa7fb5 | 2911 | /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */ |
13ae64f3 | 2912 | rel++; |
60f2e42e | 2913 | wrel++; |
13ae64f3 JJ |
2914 | continue; |
2915 | } | |
419414ea | 2916 | else if (r_type == R_386_TLS_GOTDESC) |
67a4f2b7 AO |
2917 | { |
2918 | /* GDesc -> LE transition. | |
2919 | It's originally something like: | |
2920 | leal x@tlsdesc(%ebx), %eax | |
2921 | ||
2922 | leal x@ntpoff, %eax | |
2923 | ||
2924 | Registers other than %eax may be set up here. */ | |
2925 | ||
142411ca | 2926 | unsigned int val; |
67a4f2b7 AO |
2927 | bfd_vma roff; |
2928 | ||
67a4f2b7 | 2929 | roff = rel->r_offset; |
67a4f2b7 | 2930 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
2931 | |
2932 | /* Now modify the instruction as appropriate. */ | |
2933 | /* aoliva FIXME: remove the above and xor the byte | |
2934 | below with 0x86. */ | |
2935 | bfd_put_8 (output_bfd, val ^ 0x86, | |
2936 | contents + roff - 1); | |
eb4ff4d6 | 2937 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
67a4f2b7 AO |
2938 | contents + roff); |
2939 | continue; | |
2940 | } | |
419414ea | 2941 | else if (r_type == R_386_TLS_DESC_CALL) |
67a4f2b7 AO |
2942 | { |
2943 | /* GDesc -> LE transition. | |
2944 | It's originally: | |
2945 | call *(%eax) | |
2946 | Turn it into: | |
142411ca | 2947 | xchg %ax,%ax */ |
67a4f2b7 | 2948 | |
67a4f2b7 | 2949 | bfd_vma roff; |
6bbec505 | 2950 | |
67a4f2b7 | 2951 | roff = rel->r_offset; |
10efb593 | 2952 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
2953 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
2954 | continue; | |
2955 | } | |
419414ea | 2956 | else if (r_type == R_386_TLS_IE) |
13ae64f3 | 2957 | { |
142411ca | 2958 | unsigned int val; |
13ae64f3 JJ |
2959 | |
2960 | /* IE->LE transition: | |
37e55690 JJ |
2961 | Originally it can be one of: |
2962 | movl foo, %eax | |
2963 | movl foo, %reg | |
2964 | addl foo, %reg | |
2965 | We change it into: | |
2966 | movl $foo, %eax | |
2967 | movl $foo, %reg | |
2968 | addl $foo, %reg. */ | |
37e55690 | 2969 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
37e55690 JJ |
2970 | if (val == 0xa1) |
2971 | { | |
2972 | /* movl foo, %eax. */ | |
55fd94b0 AM |
2973 | bfd_put_8 (output_bfd, 0xb8, |
2974 | contents + rel->r_offset - 1); | |
37e55690 | 2975 | } |
299bf759 | 2976 | else |
37e55690 | 2977 | { |
142411ca L |
2978 | unsigned int type; |
2979 | ||
55fd94b0 AM |
2980 | type = bfd_get_8 (input_bfd, |
2981 | contents + rel->r_offset - 2); | |
299bf759 | 2982 | switch (type) |
26e41594 | 2983 | { |
299bf759 L |
2984 | case 0x8b: |
2985 | /* movl */ | |
299bf759 L |
2986 | bfd_put_8 (output_bfd, 0xc7, |
2987 | contents + rel->r_offset - 2); | |
2988 | bfd_put_8 (output_bfd, | |
2989 | 0xc0 | ((val >> 3) & 7), | |
2990 | contents + rel->r_offset - 1); | |
2991 | break; | |
2992 | case 0x03: | |
2993 | /* addl */ | |
299bf759 L |
2994 | bfd_put_8 (output_bfd, 0x81, |
2995 | contents + rel->r_offset - 2); | |
2996 | bfd_put_8 (output_bfd, | |
2997 | 0xc0 | ((val >> 3) & 7), | |
2998 | contents + rel->r_offset - 1); | |
2999 | break; | |
3000 | default: | |
3001 | BFD_FAIL (); | |
3002 | break; | |
26e41594 | 3003 | } |
37e55690 | 3004 | } |
eb4ff4d6 | 3005 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
3006 | contents + rel->r_offset); |
3007 | continue; | |
3008 | } | |
3009 | else | |
3010 | { | |
3011 | unsigned int val, type; | |
3012 | ||
3013 | /* {IE_32,GOTIE}->LE transition: | |
3014 | Originally it can be one of: | |
13ae64f3 | 3015 | subl foo(%reg1), %reg2 |
13ae64f3 | 3016 | movl foo(%reg1), %reg2 |
37e55690 | 3017 | addl foo(%reg1), %reg2 |
13ae64f3 JJ |
3018 | We change it into: |
3019 | subl $foo, %reg2 | |
37e55690 JJ |
3020 | movl $foo, %reg2 (6 byte form) |
3021 | addl $foo, %reg2. */ | |
13ae64f3 JJ |
3022 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
3023 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
13ae64f3 JJ |
3024 | if (type == 0x8b) |
3025 | { | |
3026 | /* movl */ | |
13ae64f3 JJ |
3027 | bfd_put_8 (output_bfd, 0xc7, |
3028 | contents + rel->r_offset - 2); | |
3029 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3030 | contents + rel->r_offset - 1); | |
3031 | } | |
3032 | else if (type == 0x2b) | |
3033 | { | |
3034 | /* subl */ | |
13ae64f3 JJ |
3035 | bfd_put_8 (output_bfd, 0x81, |
3036 | contents + rel->r_offset - 2); | |
3037 | bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7), | |
3038 | contents + rel->r_offset - 1); | |
3039 | } | |
37e55690 JJ |
3040 | else if (type == 0x03) |
3041 | { | |
3042 | /* addl */ | |
3043 | bfd_put_8 (output_bfd, 0x81, | |
3044 | contents + rel->r_offset - 2); | |
3045 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3046 | contents + rel->r_offset - 1); | |
3047 | } | |
13ae64f3 JJ |
3048 | else |
3049 | BFD_FAIL (); | |
419414ea | 3050 | if (r_type == R_386_TLS_GOTIE) |
eb4ff4d6 | 3051 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
3052 | contents + rel->r_offset); |
3053 | else | |
eb4ff4d6 | 3054 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
37e55690 | 3055 | contents + rel->r_offset); |
13ae64f3 JJ |
3056 | continue; |
3057 | } | |
3058 | } | |
3059 | ||
6de2ae4a | 3060 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
3061 | abort (); |
3062 | ||
3063 | if (h != NULL) | |
67a4f2b7 AO |
3064 | { |
3065 | off = h->got.offset; | |
0afcef53 | 3066 | offplt = elf_x86_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 3067 | } |
13ae64f3 JJ |
3068 | else |
3069 | { | |
3070 | if (local_got_offsets == NULL) | |
3071 | abort (); | |
3072 | ||
3073 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 3074 | offplt = local_tlsdesc_gotents[r_symndx]; |
13ae64f3 JJ |
3075 | } |
3076 | ||
3077 | if ((off & 1) != 0) | |
3078 | off &= ~1; | |
26e41594 | 3079 | else |
13ae64f3 | 3080 | { |
947216bf | 3081 | Elf_Internal_Rela outrel; |
91d6fa6a | 3082 | int dr_type; |
67a4f2b7 | 3083 | asection *sreloc; |
13ae64f3 | 3084 | |
6de2ae4a | 3085 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
3086 | abort (); |
3087 | ||
67a4f2b7 AO |
3088 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3089 | ||
3090 | if (GOT_TLS_GDESC_P (tls_type)) | |
3091 | { | |
59d6ffb2 | 3092 | bfd_byte *loc; |
67a4f2b7 AO |
3093 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC); |
3094 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8 | |
6de2ae4a L |
3095 | <= htab->elf.sgotplt->size); |
3096 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
3097 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3098 | + offplt |
3099 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 3100 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 3101 | loc = sreloc->contents; |
765e526c | 3102 | loc += (htab->next_tls_desc_index++ |
5ae0bfb6 | 3103 | * sizeof (Elf32_External_Rel)); |
67a4f2b7 | 3104 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
c3b02097 | 3105 | <= sreloc->contents + sreloc->size); |
67a4f2b7 AO |
3106 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
3107 | if (indx == 0) | |
3108 | { | |
3109 | BFD_ASSERT (! unresolved_reloc); | |
3110 | bfd_put_32 (output_bfd, | |
0afcef53 | 3111 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3112 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
3113 | + htab->sgotplt_jump_table_size + 4); |
3114 | } | |
3115 | else | |
3116 | { | |
3117 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 3118 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
3119 | + htab->sgotplt_jump_table_size + 4); |
3120 | } | |
3121 | } | |
3122 | ||
6de2ae4a | 3123 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 3124 | |
6de2ae4a L |
3125 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3126 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 | 3127 | |
67a4f2b7 | 3128 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 | 3129 | dr_type = R_386_TLS_DTPMOD32; |
67a4f2b7 AO |
3130 | else if (GOT_TLS_GDESC_P (tls_type)) |
3131 | goto dr_done; | |
37e55690 JJ |
3132 | else if (tls_type == GOT_TLS_IE_POS) |
3133 | dr_type = R_386_TLS_TPOFF; | |
13ae64f3 JJ |
3134 | else |
3135 | dr_type = R_386_TLS_TPOFF32; | |
67a4f2b7 | 3136 | |
37e55690 | 3137 | if (dr_type == R_386_TLS_TPOFF && indx == 0) |
eb4ff4d6 | 3138 | bfd_put_32 (output_bfd, |
0afcef53 | 3139 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3140 | htab->elf.sgot->contents + off); |
37e55690 | 3141 | else if (dr_type == R_386_TLS_TPOFF32 && indx == 0) |
23209a78 | 3142 | bfd_put_32 (output_bfd, |
0afcef53 | 3143 | _bfd_x86_elf_dtpoff_base (info) - relocation, |
6de2ae4a | 3144 | htab->elf.sgot->contents + off); |
67a4f2b7 | 3145 | else if (dr_type != R_386_TLS_DESC) |
c366c25e | 3146 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 3147 | htab->elf.sgot->contents + off); |
13ae64f3 | 3148 | outrel.r_info = ELF32_R_INFO (indx, dr_type); |
67a4f2b7 | 3149 | |
59d6ffb2 | 3150 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 | 3151 | |
67a4f2b7 | 3152 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 JJ |
3153 | { |
3154 | if (indx == 0) | |
3155 | { | |
82e51918 | 3156 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 | 3157 | bfd_put_32 (output_bfd, |
0afcef53 | 3158 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3159 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
3160 | } |
3161 | else | |
3162 | { | |
3163 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 3164 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
3165 | outrel.r_info = ELF32_R_INFO (indx, |
3166 | R_386_TLS_DTPOFF32); | |
3167 | outrel.r_offset += 4; | |
59d6ffb2 | 3168 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 JJ |
3169 | } |
3170 | } | |
37e55690 JJ |
3171 | else if (tls_type == GOT_TLS_IE_BOTH) |
3172 | { | |
3173 | bfd_put_32 (output_bfd, | |
eb4ff4d6 | 3174 | (indx == 0 |
0afcef53 | 3175 | ? relocation - _bfd_x86_elf_dtpoff_base (info) |
eb4ff4d6 | 3176 | : 0), |
6de2ae4a | 3177 | htab->elf.sgot->contents + off + 4); |
37e55690 JJ |
3178 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); |
3179 | outrel.r_offset += 4; | |
59d6ffb2 | 3180 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 | 3181 | } |
13ae64f3 | 3182 | |
67a4f2b7 | 3183 | dr_done: |
13ae64f3 JJ |
3184 | if (h != NULL) |
3185 | h->got.offset |= 1; | |
3186 | else | |
3187 | local_got_offsets[r_symndx] |= 1; | |
3188 | } | |
3189 | ||
67a4f2b7 AO |
3190 | if (off >= (bfd_vma) -2 |
3191 | && ! GOT_TLS_GDESC_P (tls_type)) | |
13ae64f3 | 3192 | abort (); |
419414ea L |
3193 | if (r_type_tls == R_386_TLS_GOTDESC |
3194 | || r_type_tls == R_386_TLS_DESC_CALL) | |
67a4f2b7 AO |
3195 | { |
3196 | relocation = htab->sgotplt_jump_table_size + offplt; | |
3197 | unresolved_reloc = FALSE; | |
3198 | } | |
419414ea | 3199 | else if (r_type_tls == r_type) |
13ae64f3 | 3200 | { |
6de2ae4a L |
3201 | bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma |
3202 | + htab->elf.sgotplt->output_offset; | |
3203 | relocation = htab->elf.sgot->output_section->vma | |
3204 | + htab->elf.sgot->output_offset + off - g_o_t; | |
37e55690 JJ |
3205 | if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE) |
3206 | && tls_type == GOT_TLS_IE_BOTH) | |
3207 | relocation += 4; | |
3208 | if (r_type == R_386_TLS_IE) | |
8c37241b | 3209 | relocation += g_o_t; |
b34976b6 | 3210 | unresolved_reloc = FALSE; |
13ae64f3 | 3211 | } |
419414ea | 3212 | else if (r_type == R_386_TLS_GD) |
13ae64f3 JJ |
3213 | { |
3214 | unsigned int val, type; | |
3215 | bfd_vma roff; | |
3216 | ||
3217 | /* GD->IE transition. */ | |
6eaa7fb5 L |
3218 | type = *(contents + rel->r_offset - 2); |
3219 | val = *(contents + rel->r_offset - 1); | |
13ae64f3 JJ |
3220 | if (type == 0x04) |
3221 | { | |
6eaa7fb5 L |
3222 | /* Change |
3223 | leal foo@tlsgd(,%ebx,1), %eax | |
3224 | call ___tls_get_addr@PLT | |
3225 | into: | |
3226 | movl %gs:0, %eax | |
3227 | subl $foo@gottpoff(%ebx), %eax. */ | |
13ae64f3 | 3228 | val >>= 3; |
142411ca | 3229 | roff = rel->r_offset - 3; |
13ae64f3 JJ |
3230 | } |
3231 | else | |
3232 | { | |
6eaa7fb5 L |
3233 | /* Change |
3234 | leal foo@tlsgd(%ebx), %eax | |
3235 | call ___tls_get_addr@PLT | |
3236 | nop | |
3237 | or | |
3238 | leal foo@tlsgd(%reg), %eax | |
3239 | call *___tls_get_addr@GOT(%reg) | |
3240 | which may be converted to | |
3241 | addr32 call ___tls_get_addr | |
3242 | into: | |
3243 | movl %gs:0, %eax; | |
3244 | subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 JJ |
3245 | roff = rel->r_offset - 2; |
3246 | } | |
3247 | memcpy (contents + roff, | |
3248 | "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12); | |
3249 | contents[roff + 7] = 0x80 | (val & 7); | |
37e55690 JJ |
3250 | /* If foo is used only with foo@gotntpoff(%reg) and |
3251 | foo@indntpoff, but not with foo@gottpoff(%reg), change | |
3252 | subl $foo@gottpoff(%reg), %eax | |
3253 | into: | |
3254 | addl $foo@gotntpoff(%reg), %eax. */ | |
ebcfb3c0 JJ |
3255 | if (tls_type == GOT_TLS_IE_POS) |
3256 | contents[roff + 6] = 0x03; | |
8c37241b | 3257 | bfd_put_32 (output_bfd, |
6de2ae4a L |
3258 | htab->elf.sgot->output_section->vma |
3259 | + htab->elf.sgot->output_offset + off | |
3260 | - htab->elf.sgotplt->output_section->vma | |
3261 | - htab->elf.sgotplt->output_offset, | |
13ae64f3 | 3262 | contents + roff + 8); |
6eaa7fb5 | 3263 | /* Skip R_386_PLT32 and R_386_GOT32X. */ |
13ae64f3 | 3264 | rel++; |
60f2e42e | 3265 | wrel++; |
13ae64f3 JJ |
3266 | continue; |
3267 | } | |
419414ea | 3268 | else if (r_type == R_386_TLS_GOTDESC) |
67a4f2b7 AO |
3269 | { |
3270 | /* GDesc -> IE transition. | |
3271 | It's originally something like: | |
3272 | leal x@tlsdesc(%ebx), %eax | |
3273 | ||
3274 | Change it to: | |
142411ca | 3275 | movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax |
67a4f2b7 AO |
3276 | or: |
3277 | movl x@gottpoff(%ebx), %eax # before negl %eax | |
3278 | ||
3279 | Registers other than %eax may be set up here. */ | |
3280 | ||
67a4f2b7 AO |
3281 | bfd_vma roff; |
3282 | ||
3283 | /* First, make sure it's a leal adding ebx to a 32-bit | |
3284 | offset into any register, although it's probably | |
3285 | almost always going to be eax. */ | |
3286 | roff = rel->r_offset; | |
67a4f2b7 AO |
3287 | |
3288 | /* Now modify the instruction as appropriate. */ | |
3289 | /* To turn a leal into a movl in the form we use it, it | |
3290 | suffices to change the first byte from 0x8d to 0x8b. | |
3291 | aoliva FIXME: should we decide to keep the leal, all | |
3292 | we have to do is remove the statement below, and | |
3293 | adjust the relaxation of R_386_TLS_DESC_CALL. */ | |
3294 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
3295 | ||
3296 | if (tls_type == GOT_TLS_IE_BOTH) | |
3297 | off += 4; | |
3298 | ||
3299 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
3300 | htab->elf.sgot->output_section->vma |
3301 | + htab->elf.sgot->output_offset + off | |
3302 | - htab->elf.sgotplt->output_section->vma | |
3303 | - htab->elf.sgotplt->output_offset, | |
67a4f2b7 AO |
3304 | contents + roff); |
3305 | continue; | |
3306 | } | |
419414ea | 3307 | else if (r_type == R_386_TLS_DESC_CALL) |
67a4f2b7 AO |
3308 | { |
3309 | /* GDesc -> IE transition. | |
3310 | It's originally: | |
3311 | call *(%eax) | |
3312 | ||
3313 | Change it to: | |
142411ca | 3314 | xchg %ax,%ax |
67a4f2b7 AO |
3315 | or |
3316 | negl %eax | |
3317 | depending on how we transformed the TLS_GOTDESC above. | |
3318 | */ | |
3319 | ||
67a4f2b7 AO |
3320 | bfd_vma roff; |
3321 | ||
67a4f2b7 | 3322 | roff = rel->r_offset; |
67a4f2b7 AO |
3323 | |
3324 | /* Now modify the instruction as appropriate. */ | |
3325 | if (tls_type != GOT_TLS_IE_NEG) | |
3326 | { | |
10efb593 L |
3327 | /* xchg %ax,%ax */ |
3328 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
3329 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3330 | } | |
3331 | else | |
3332 | { | |
3333 | /* negl %eax */ | |
3334 | bfd_put_8 (output_bfd, 0xf7, contents + roff); | |
3335 | bfd_put_8 (output_bfd, 0xd8, contents + roff + 1); | |
3336 | } | |
3337 | ||
3338 | continue; | |
3339 | } | |
3340 | else | |
3341 | BFD_ASSERT (FALSE); | |
13ae64f3 JJ |
3342 | break; |
3343 | ||
3344 | case R_386_TLS_LDM: | |
142411ca L |
3345 | if (! elf_i386_tls_transition (info, input_bfd, |
3346 | input_section, contents, | |
3347 | symtab_hdr, sym_hashes, | |
3348 | &r_type, GOT_UNKNOWN, rel, | |
bedfd056 | 3349 | relend, h, r_symndx, TRUE)) |
142411ca | 3350 | return FALSE; |
13ae64f3 | 3351 | |
142411ca L |
3352 | if (r_type != R_386_TLS_LDM) |
3353 | { | |
6eaa7fb5 L |
3354 | /* LD->LE transition. Change |
3355 | leal foo@tlsldm(%ebx) %eax | |
3356 | call ___tls_get_addr@PLT | |
3357 | into: | |
3358 | movl %gs:0, %eax | |
3359 | nop | |
3360 | leal 0(%esi,1), %esi | |
3361 | or change | |
3362 | leal foo@tlsldm(%reg) %eax | |
3363 | call *___tls_get_addr@GOT(%reg) | |
3364 | which may be converted to | |
3365 | addr32 call ___tls_get_addr | |
3366 | into: | |
3367 | movl %gs:0, %eax | |
3368 | leal 0(%esi), %esi */ | |
142411ca | 3369 | BFD_ASSERT (r_type == R_386_TLS_LE_32); |
6eaa7fb5 L |
3370 | if (*(contents + rel->r_offset + 4) == 0xff |
3371 | || *(contents + rel->r_offset + 4) == 0x67) | |
3372 | memcpy (contents + rel->r_offset - 2, | |
3373 | "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12); | |
3374 | else | |
3375 | memcpy (contents + rel->r_offset - 2, | |
3376 | "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11); | |
a3fadc9a | 3377 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 | 3378 | rel++; |
60f2e42e | 3379 | wrel++; |
13ae64f3 JJ |
3380 | continue; |
3381 | } | |
3382 | ||
6de2ae4a | 3383 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
3384 | abort (); |
3385 | ||
0afcef53 | 3386 | off = htab->tls_ld_or_ldm_got.offset; |
13ae64f3 JJ |
3387 | if (off & 1) |
3388 | off &= ~1; | |
3389 | else | |
3390 | { | |
947216bf | 3391 | Elf_Internal_Rela outrel; |
13ae64f3 | 3392 | |
6de2ae4a | 3393 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
3394 | abort (); |
3395 | ||
6de2ae4a L |
3396 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3397 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 JJ |
3398 | |
3399 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 3400 | htab->elf.sgot->contents + off); |
13ae64f3 | 3401 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 3402 | htab->elf.sgot->contents + off + 4); |
13ae64f3 | 3403 | outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32); |
59d6ffb2 | 3404 | elf_append_rel (output_bfd, htab->elf.srelgot, &outrel); |
0afcef53 | 3405 | htab->tls_ld_or_ldm_got.offset |= 1; |
13ae64f3 | 3406 | } |
6de2ae4a L |
3407 | relocation = htab->elf.sgot->output_section->vma |
3408 | + htab->elf.sgot->output_offset + off | |
3409 | - htab->elf.sgotplt->output_section->vma | |
3410 | - htab->elf.sgotplt->output_offset; | |
b34976b6 | 3411 | unresolved_reloc = FALSE; |
13ae64f3 JJ |
3412 | break; |
3413 | ||
3414 | case R_386_TLS_LDO_32: | |
0e1862bb L |
3415 | if (!bfd_link_executable (info) |
3416 | || (input_section->flags & SEC_CODE) == 0) | |
0afcef53 | 3417 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
13ae64f3 JJ |
3418 | else |
3419 | /* When converting LDO to LE, we must negate. */ | |
eb4ff4d6 | 3420 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
3421 | break; |
3422 | ||
3423 | case R_386_TLS_LE_32: | |
13ae64f3 | 3424 | case R_386_TLS_LE: |
0e1862bb | 3425 | if (!bfd_link_executable (info)) |
37e55690 | 3426 | { |
947216bf | 3427 | Elf_Internal_Rela outrel; |
37e55690 | 3428 | asection *sreloc; |
37e55690 JJ |
3429 | |
3430 | outrel.r_offset = rel->r_offset | |
3431 | + input_section->output_section->vma | |
3432 | + input_section->output_offset; | |
3433 | if (h != NULL && h->dynindx != -1) | |
3434 | indx = h->dynindx; | |
3435 | else | |
3436 | indx = 0; | |
3437 | if (r_type == R_386_TLS_LE_32) | |
3438 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32); | |
3439 | else | |
3440 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); | |
3441 | sreloc = elf_section_data (input_section)->sreloc; | |
3442 | if (sreloc == NULL) | |
3443 | abort (); | |
59d6ffb2 | 3444 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
3445 | if (indx) |
3446 | continue; | |
3447 | else if (r_type == R_386_TLS_LE_32) | |
0afcef53 | 3448 | relocation = _bfd_x86_elf_dtpoff_base (info) - relocation; |
37e55690 | 3449 | else |
0afcef53 | 3450 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
37e55690 JJ |
3451 | } |
3452 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 3453 | relocation = elf_i386_tpoff (info, relocation); |
37e55690 | 3454 | else |
eb4ff4d6 | 3455 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
3456 | break; |
3457 | ||
252b5132 RH |
3458 | default: |
3459 | break; | |
3460 | } | |
3461 | ||
239e1f3a AM |
3462 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3463 | because such sections are not SEC_ALLOC and thus ld.so will | |
3464 | not process them. */ | |
8c694914 | 3465 | if (unresolved_reloc |
239e1f3a | 3466 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
3467 | && h->def_dynamic) |
3468 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
3469 | rel->r_offset) != (bfd_vma) -1) | |
6a30718d | 3470 | { |
4eca0228 | 3471 | _bfd_error_handler |
695344c0 | 3472 | /* xgettext:c-format */ |
d42c267e | 3473 | (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
3474 | input_bfd, |
3475 | input_section, | |
d42c267e | 3476 | rel->r_offset, |
843fe662 | 3477 | howto->name, |
6a30718d | 3478 | h->root.root.string); |
b34976b6 | 3479 | return FALSE; |
6a30718d | 3480 | } |
83be169b | 3481 | |
cbe950e9 | 3482 | do_relocation: |
252b5132 RH |
3483 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
3484 | contents, rel->r_offset, | |
55fd94b0 | 3485 | relocation, 0); |
252b5132 | 3486 | |
62d78908 | 3487 | check_relocation_error: |
cf5c0c5b | 3488 | if (r != bfd_reloc_ok) |
252b5132 | 3489 | { |
cf5c0c5b | 3490 | const char *name; |
ffb2e45b | 3491 | |
cf5c0c5b AM |
3492 | if (h != NULL) |
3493 | name = h->root.root.string; | |
3494 | else | |
3495 | { | |
3496 | name = bfd_elf_string_from_elf_section (input_bfd, | |
3497 | symtab_hdr->sh_link, | |
3498 | sym->st_name); | |
3499 | if (name == NULL) | |
b34976b6 | 3500 | return FALSE; |
cf5c0c5b AM |
3501 | if (*name == '\0') |
3502 | name = bfd_section_name (input_bfd, sec); | |
3503 | } | |
ffb2e45b | 3504 | |
cf5c0c5b | 3505 | if (r == bfd_reloc_overflow) |
1a72702b AM |
3506 | (*info->callbacks->reloc_overflow) |
3507 | (info, (h ? &h->root : NULL), name, howto->name, | |
3508 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
cf5c0c5b AM |
3509 | else |
3510 | { | |
4eca0228 | 3511 | _bfd_error_handler |
695344c0 | 3512 | /* xgettext:c-format */ |
d42c267e | 3513 | (_("%B(%A+%#Lx): reloc against `%s': error %d"), |
d003868e | 3514 | input_bfd, input_section, |
d42c267e | 3515 | rel->r_offset, name, (int) r); |
b34976b6 | 3516 | return FALSE; |
cf5c0c5b | 3517 | } |
252b5132 | 3518 | } |
60f2e42e L |
3519 | |
3520 | if (wrel != rel) | |
3521 | *wrel = *rel; | |
3522 | } | |
3523 | ||
3524 | if (wrel != rel) | |
3525 | { | |
3526 | Elf_Internal_Shdr *rel_hdr; | |
3527 | size_t deleted = rel - wrel; | |
3528 | ||
3529 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
3530 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
3531 | if (rel_hdr->sh_size == 0) | |
3532 | { | |
3533 | /* It is too late to remove an empty reloc section. Leave | |
3534 | one NONE reloc. | |
3535 | ??? What is wrong with an empty section??? */ | |
3536 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
3537 | deleted -= 1; | |
3538 | } | |
3539 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
3540 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
3541 | input_section->reloc_count -= deleted; | |
252b5132 RH |
3542 | } |
3543 | ||
b34976b6 | 3544 | return TRUE; |
252b5132 RH |
3545 | } |
3546 | ||
3547 | /* Finish up dynamic symbol handling. We set the contents of various | |
3548 | dynamic sections here. */ | |
3549 | ||
b34976b6 | 3550 | static bfd_boolean |
55fd94b0 AM |
3551 | elf_i386_finish_dynamic_symbol (bfd *output_bfd, |
3552 | struct bfd_link_info *info, | |
3553 | struct elf_link_hash_entry *h, | |
3554 | Elf_Internal_Sym *sym) | |
252b5132 | 3555 | { |
0afcef53 | 3556 | struct elf_x86_link_hash_table *htab; |
25e762b9 | 3557 | unsigned plt_entry_size; |
0afcef53 | 3558 | struct elf_x86_link_hash_entry *eh; |
aec6b87e | 3559 | bfd_boolean local_undefweak; |
ee2fdd6f | 3560 | bfd_boolean use_plt_second; |
252b5132 | 3561 | |
0afcef53 | 3562 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 NC |
3563 | if (htab == NULL) |
3564 | return FALSE; | |
252b5132 | 3565 | |
765e526c | 3566 | plt_entry_size = htab->plt.plt_entry_size; |
25e762b9 | 3567 | |
ee2fdd6f L |
3568 | /* Use the second PLT section only if there is .plt section. */ |
3569 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
3570 | ||
0afcef53 | 3571 | eh = (struct elf_x86_link_hash_entry *) h; |
e133d005 L |
3572 | if (eh->no_finish_dynamic_symbol) |
3573 | abort (); | |
dd7e64d4 | 3574 | |
aec6b87e L |
3575 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
3576 | resolved undefined weak symbols in executable so that their | |
3577 | references have value 0 at run-time. */ | |
c5bce5c6 | 3578 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); |
aec6b87e | 3579 | |
252b5132 RH |
3580 | if (h->plt.offset != (bfd_vma) -1) |
3581 | { | |
ee2fdd6f | 3582 | bfd_vma plt_index, plt_offset; |
252b5132 | 3583 | bfd_vma got_offset; |
947216bf AM |
3584 | Elf_Internal_Rela rel; |
3585 | bfd_byte *loc; | |
ee2fdd6f | 3586 | asection *plt, *resolved_plt, *gotplt, *relplt; |
cbe950e9 L |
3587 | |
3588 | /* When building a static executable, use .iplt, .igot.plt and | |
3589 | .rel.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 3590 | if (htab->elf.splt != NULL) |
cbe950e9 | 3591 | { |
6de2ae4a L |
3592 | plt = htab->elf.splt; |
3593 | gotplt = htab->elf.sgotplt; | |
3594 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
3595 | } |
3596 | else | |
3597 | { | |
6de2ae4a L |
3598 | plt = htab->elf.iplt; |
3599 | gotplt = htab->elf.igotplt; | |
3600 | relplt = htab->elf.irelplt; | |
cbe950e9 | 3601 | } |
252b5132 RH |
3602 | |
3603 | /* This symbol has an entry in the procedure linkage table. Set | |
3604 | it up. */ | |
3605 | ||
cbe950e9 | 3606 | if ((h->dynindx == -1 |
aec6b87e | 3607 | && !local_undefweak |
0e1862bb | 3608 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
3609 | && h->def_regular |
3610 | && h->type == STT_GNU_IFUNC)) | |
3611 | || plt == NULL | |
3612 | || gotplt == NULL | |
3613 | || relplt == NULL) | |
cec7f46a | 3614 | abort (); |
252b5132 RH |
3615 | |
3616 | /* Get the index in the procedure linkage table which | |
3617 | corresponds to this symbol. This is the index of this symbol | |
3618 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 3619 | first entry in the procedure linkage table is reserved. |
252b5132 | 3620 | |
cbe950e9 | 3621 | Get the offset into the .got table of the entry that |
252b5132 | 3622 | corresponds to this function. Each .got entry is 4 bytes. |
cbe950e9 | 3623 | The first three are reserved. |
6bbec505 | 3624 | |
cbe950e9 L |
3625 | For static executables, we don't reserve anything. */ |
3626 | ||
6de2ae4a | 3627 | if (plt == htab->elf.splt) |
cbe950e9 | 3628 | { |
f604c2a2 | 3629 | got_offset = (h->plt.offset / plt_entry_size |
765e526c | 3630 | - htab->plt.has_plt0); |
e1f98742 | 3631 | got_offset = (got_offset + 3) * 4; |
cbe950e9 L |
3632 | } |
3633 | else | |
3634 | { | |
e1f98742 L |
3635 | got_offset = h->plt.offset / plt_entry_size; |
3636 | got_offset = got_offset * 4; | |
cbe950e9 | 3637 | } |
252b5132 | 3638 | |
f604c2a2 L |
3639 | /* Fill in the entry in the procedure linkage table and update |
3640 | the first slot. */ | |
765e526c | 3641 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, |
f604c2a2 | 3642 | plt_entry_size); |
ee2fdd6f L |
3643 | |
3644 | if (use_plt_second) | |
3645 | { | |
3646 | const bfd_byte *plt_entry; | |
3647 | if (bfd_link_pic (info)) | |
765e526c | 3648 | plt_entry = htab->non_lazy_plt->pic_plt_entry; |
ee2fdd6f | 3649 | else |
765e526c | 3650 | plt_entry = htab->non_lazy_plt->plt_entry; |
ee2fdd6f | 3651 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
765e526c | 3652 | plt_entry, htab->non_lazy_plt->plt_entry_size); |
ee2fdd6f L |
3653 | |
3654 | resolved_plt = htab->plt_second; | |
3655 | plt_offset = eh->plt_second.offset; | |
3656 | } | |
3657 | else | |
3658 | { | |
3659 | resolved_plt = plt; | |
3660 | plt_offset = h->plt.offset; | |
3661 | } | |
3662 | ||
0e1862bb | 3663 | if (! bfd_link_pic (info)) |
252b5132 | 3664 | { |
252b5132 | 3665 | bfd_put_32 (output_bfd, |
cbe950e9 L |
3666 | (gotplt->output_section->vma |
3667 | + gotplt->output_offset | |
252b5132 | 3668 | + got_offset), |
ee2fdd6f | 3669 | resolved_plt->contents + plt_offset |
765e526c | 3670 | + htab->plt.plt_got_offset); |
eac338cf | 3671 | |
9a742a90 | 3672 | if (htab->is_vxworks) |
eac338cf PB |
3673 | { |
3674 | int s, k, reloc_index; | |
3675 | ||
3676 | /* Create the R_386_32 relocation referencing the GOT | |
3677 | for this PLT entry. */ | |
3678 | ||
3679 | /* S: Current slot number (zero-based). */ | |
765e526c L |
3680 | s = ((h->plt.offset - htab->plt.plt_entry_size) |
3681 | / htab->plt.plt_entry_size); | |
eac338cf | 3682 | /* K: Number of relocations for PLTResolve. */ |
0e1862bb | 3683 | if (bfd_link_pic (info)) |
eac338cf PB |
3684 | k = PLTRESOLVE_RELOCS_SHLIB; |
3685 | else | |
3686 | k = PLTRESOLVE_RELOCS; | |
3687 | /* Skip the PLTresolve relocations, and the relocations for | |
3688 | the other PLT slots. */ | |
3689 | reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS; | |
765e526c | 3690 | loc = (htab->srelplt2->contents + reloc_index |
eac338cf PB |
3691 | * sizeof (Elf32_External_Rel)); |
3692 | ||
ee2fdd6f L |
3693 | rel.r_offset = (plt->output_section->vma |
3694 | + plt->output_offset | |
eac338cf | 3695 | + h->plt.offset + 2), |
7325306f | 3696 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
3697 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
3698 | ||
3699 | /* Create the R_386_32 relocation referencing the beginning of | |
3700 | the PLT for this GOT entry. */ | |
6de2ae4a L |
3701 | rel.r_offset = (htab->elf.sgotplt->output_section->vma |
3702 | + htab->elf.sgotplt->output_offset | |
eac338cf | 3703 | + got_offset); |
7325306f | 3704 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf | 3705 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
13ca3149 | 3706 | loc + sizeof (Elf32_External_Rel)); |
eac338cf | 3707 | } |
252b5132 RH |
3708 | } |
3709 | else | |
3710 | { | |
252b5132 | 3711 | bfd_put_32 (output_bfd, got_offset, |
ee2fdd6f | 3712 | resolved_plt->contents + plt_offset |
765e526c | 3713 | + htab->plt.plt_got_offset); |
252b5132 RH |
3714 | } |
3715 | ||
aec6b87e L |
3716 | /* Fill in the entry in the global offset table. Leave the entry |
3717 | as zero for undefined weak symbol in PIE. No PLT relocation | |
3718 | against undefined weak symbol in PIE. */ | |
3719 | if (!local_undefweak) | |
cbe950e9 | 3720 | { |
765e526c | 3721 | if (htab->plt.has_plt0) |
f604c2a2 L |
3722 | bfd_put_32 (output_bfd, |
3723 | (plt->output_section->vma | |
3724 | + plt->output_offset | |
3725 | + h->plt.offset | |
765e526c | 3726 | + htab->lazy_plt->plt_lazy_offset), |
f604c2a2 | 3727 | gotplt->contents + got_offset); |
252b5132 | 3728 | |
aec6b87e L |
3729 | /* Fill in the entry in the .rel.plt section. */ |
3730 | rel.r_offset = (gotplt->output_section->vma | |
3731 | + gotplt->output_offset | |
3732 | + got_offset); | |
cf1070f1 | 3733 | if (PLT_LOCAL_IFUNC_P (info, h)) |
aec6b87e | 3734 | { |
6322e5c5 L |
3735 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
3736 | h->root.root.string, | |
3737 | h->root.u.def.section->owner); | |
3738 | ||
aec6b87e L |
3739 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
3740 | R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend | |
3741 | in the .got.plt section. */ | |
3742 | bfd_put_32 (output_bfd, | |
3743 | (h->root.u.def.value | |
3744 | + h->root.u.def.section->output_section->vma | |
3745 | + h->root.u.def.section->output_offset), | |
3746 | gotplt->contents + got_offset); | |
3747 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
3748 | /* R_386_IRELATIVE comes last. */ | |
3749 | plt_index = htab->next_irelative_index--; | |
3750 | } | |
3751 | else | |
3752 | { | |
3753 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
3754 | plt_index = htab->next_jump_slot_index++; | |
3755 | } | |
3756 | ||
3757 | loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel); | |
3758 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
3759 | ||
f604c2a2 L |
3760 | /* Don't fill the second and third slots in PLT entry for |
3761 | static executables nor without PLT0. */ | |
765e526c | 3762 | if (plt == htab->elf.splt && htab->plt.has_plt0) |
aec6b87e L |
3763 | { |
3764 | bfd_put_32 (output_bfd, | |
3765 | plt_index * sizeof (Elf32_External_Rel), | |
3766 | plt->contents + h->plt.offset | |
765e526c | 3767 | + htab->lazy_plt->plt_reloc_offset); |
f604c2a2 L |
3768 | bfd_put_32 (output_bfd, |
3769 | - (h->plt.offset | |
765e526c | 3770 | + htab->lazy_plt->plt_plt_offset + 4), |
f604c2a2 | 3771 | (plt->contents + h->plt.offset |
765e526c | 3772 | + htab->lazy_plt->plt_plt_offset)); |
aec6b87e | 3773 | } |
e1f98742 | 3774 | } |
dd7e64d4 L |
3775 | } |
3776 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
3777 | { | |
3778 | bfd_vma got_offset, plt_offset; | |
3779 | asection *plt, *got, *gotplt; | |
3780 | const bfd_byte *got_plt_entry; | |
3781 | ||
dd7e64d4 L |
3782 | /* Set the entry in the GOT procedure linkage table. */ |
3783 | plt = htab->plt_got; | |
3784 | got = htab->elf.sgot; | |
3785 | gotplt = htab->elf.sgotplt; | |
3786 | got_offset = h->got.offset; | |
3787 | ||
3788 | if (got_offset == (bfd_vma) -1 | |
3789 | || plt == NULL | |
3790 | || got == NULL | |
3791 | || gotplt == NULL) | |
3792 | abort (); | |
3793 | ||
3794 | /* Fill in the entry in the GOT procedure linkage table. */ | |
0e1862bb | 3795 | if (! bfd_link_pic (info)) |
252b5132 | 3796 | { |
765e526c | 3797 | got_plt_entry = htab->non_lazy_plt->plt_entry; |
dd7e64d4 | 3798 | got_offset += got->output_section->vma + got->output_offset; |
252b5132 | 3799 | } |
dd7e64d4 L |
3800 | else |
3801 | { | |
765e526c | 3802 | got_plt_entry = htab->non_lazy_plt->pic_plt_entry; |
dd7e64d4 L |
3803 | got_offset += (got->output_section->vma |
3804 | + got->output_offset | |
3805 | - gotplt->output_section->vma | |
3806 | - gotplt->output_offset); | |
3807 | } | |
3808 | ||
3809 | plt_offset = eh->plt_got.offset; | |
3810 | memcpy (plt->contents + plt_offset, got_plt_entry, | |
765e526c | 3811 | htab->non_lazy_plt->plt_entry_size); |
dd7e64d4 | 3812 | bfd_put_32 (output_bfd, got_offset, |
f604c2a2 | 3813 | (plt->contents + plt_offset |
765e526c | 3814 | + htab->non_lazy_plt->plt_got_offset)); |
dd7e64d4 L |
3815 | } |
3816 | ||
aec6b87e L |
3817 | if (!local_undefweak |
3818 | && !h->def_regular | |
dd7e64d4 L |
3819 | && (h->plt.offset != (bfd_vma) -1 |
3820 | || eh->plt_got.offset != (bfd_vma) -1)) | |
3821 | { | |
3822 | /* Mark the symbol as undefined, rather than as defined in | |
3823 | the .plt section. Leave the value if there were any | |
3824 | relocations where pointer equality matters (this is a clue | |
3825 | for the dynamic linker, to make function pointer | |
3826 | comparisons work between an application and shared | |
3827 | library), otherwise set it to zero. If a function is only | |
3828 | called from a binary, there is no need to slow down | |
3829 | shared libraries because of that. */ | |
3830 | sym->st_shndx = SHN_UNDEF; | |
3831 | if (!h->pointer_equality_needed) | |
3832 | sym->st_value = 0; | |
252b5132 RH |
3833 | } |
3834 | ||
aec6b87e L |
3835 | /* Don't generate dynamic GOT relocation against undefined weak |
3836 | symbol in executable. */ | |
13ae64f3 | 3837 | if (h->got.offset != (bfd_vma) -1 |
0afcef53 L |
3838 | && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type) |
3839 | && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0 | |
aec6b87e | 3840 | && !local_undefweak) |
252b5132 | 3841 | { |
947216bf | 3842 | Elf_Internal_Rela rel; |
233cc9c1 | 3843 | asection *relgot = htab->elf.srelgot; |
252b5132 RH |
3844 | |
3845 | /* This symbol has an entry in the global offset table. Set it | |
3846 | up. */ | |
3847 | ||
6de2ae4a | 3848 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
ffb2e45b | 3849 | abort (); |
252b5132 | 3850 | |
6de2ae4a L |
3851 | rel.r_offset = (htab->elf.sgot->output_section->vma |
3852 | + htab->elf.sgot->output_offset | |
dc810e39 | 3853 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 3854 | |
dd5724d5 AM |
3855 | /* If this is a static link, or it is a -Bsymbolic link and the |
3856 | symbol is defined locally or was forced to be local because | |
3857 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
3858 | The entry in the global offset table will already have been |
3859 | initialized in the relocate_section function. */ | |
710ab287 | 3860 | if (h->def_regular |
0018b0a3 L |
3861 | && h->type == STT_GNU_IFUNC) |
3862 | { | |
233cc9c1 L |
3863 | if (h->plt.offset == (bfd_vma) -1) |
3864 | { | |
3865 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
3866 | if (htab->elf.splt == NULL) | |
3867 | { | |
3868 | /* use .rel[a].iplt section to store .got relocations | |
3869 | in static executable. */ | |
3870 | relgot = htab->elf.irelplt; | |
3871 | } | |
6999821f | 3872 | if (SYMBOL_REFERENCES_LOCAL_P (info, h)) |
233cc9c1 | 3873 | { |
6322e5c5 L |
3874 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
3875 | h->root.root.string, | |
3876 | h->root.u.def.section->owner); | |
3877 | ||
233cc9c1 L |
3878 | bfd_put_32 (output_bfd, |
3879 | (h->root.u.def.value | |
3880 | + h->root.u.def.section->output_section->vma | |
3881 | + h->root.u.def.section->output_offset), | |
3882 | htab->elf.sgot->contents + h->got.offset); | |
3883 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
3884 | } | |
3885 | else | |
3886 | goto do_glob_dat; | |
3887 | } | |
3888 | else if (bfd_link_pic (info)) | |
710ab287 L |
3889 | { |
3890 | /* Generate R_386_GLOB_DAT. */ | |
3891 | goto do_glob_dat; | |
3892 | } | |
3893 | else | |
3894 | { | |
cd2b2c10 | 3895 | asection *plt; |
ee2fdd6f | 3896 | bfd_vma plt_offset; |
cd2b2c10 | 3897 | |
710ab287 L |
3898 | if (!h->pointer_equality_needed) |
3899 | abort (); | |
3900 | ||
3901 | /* For non-shared object, we can't use .got.plt, which | |
3902 | contains the real function addres if we need pointer | |
3903 | equality. We load the GOT entry with the PLT entry. */ | |
ee2fdd6f L |
3904 | if (htab->plt_second != NULL) |
3905 | { | |
3906 | plt = htab->plt_second; | |
3907 | plt_offset = eh->plt_second.offset; | |
3908 | } | |
3909 | else | |
3910 | { | |
3911 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
3912 | plt_offset = h->plt.offset; | |
3913 | } | |
710ab287 L |
3914 | bfd_put_32 (output_bfd, |
3915 | (plt->output_section->vma | |
ee2fdd6f | 3916 | + plt->output_offset + plt_offset), |
6de2ae4a | 3917 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
3918 | return TRUE; |
3919 | } | |
0018b0a3 | 3920 | } |
0e1862bb | 3921 | else if (bfd_link_pic (info) |
6999821f | 3922 | && SYMBOL_REFERENCES_LOCAL_P (info, h)) |
dd5724d5 | 3923 | { |
6725bdbf | 3924 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 AM |
3925 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
3926 | } | |
252b5132 RH |
3927 | else |
3928 | { | |
dd5724d5 | 3929 | BFD_ASSERT((h->got.offset & 1) == 0); |
710ab287 | 3930 | do_glob_dat: |
6725bdbf | 3931 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 3932 | htab->elf.sgot->contents + h->got.offset); |
252b5132 RH |
3933 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
3934 | } | |
3935 | ||
233cc9c1 | 3936 | elf_append_rel (output_bfd, relgot, &rel); |
252b5132 RH |
3937 | } |
3938 | ||
f5385ebf | 3939 | if (h->needs_copy) |
252b5132 | 3940 | { |
947216bf | 3941 | Elf_Internal_Rela rel; |
5474d94f | 3942 | asection *s; |
252b5132 RH |
3943 | |
3944 | /* This symbol needs a copy reloc. Set it up. */ | |
3945 | ||
ffb2e45b AM |
3946 | if (h->dynindx == -1 |
3947 | || (h->root.type != bfd_link_hash_defined | |
3948 | && h->root.type != bfd_link_hash_defweak) | |
5474d94f AM |
3949 | || htab->elf.srelbss == NULL |
3950 | || htab->elf.sreldynrelro == NULL) | |
ffb2e45b | 3951 | abort (); |
252b5132 RH |
3952 | |
3953 | rel.r_offset = (h->root.u.def.value | |
3954 | + h->root.u.def.section->output_section->vma | |
3955 | + h->root.u.def.section->output_offset); | |
3956 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
afbf7e8e | 3957 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
3958 | s = htab->elf.sreldynrelro; |
3959 | else | |
3960 | s = htab->elf.srelbss; | |
3961 | elf_append_rel (output_bfd, s, &rel); | |
252b5132 RH |
3962 | } |
3963 | ||
b34976b6 | 3964 | return TRUE; |
252b5132 RH |
3965 | } |
3966 | ||
c25bc9fc L |
3967 | /* Finish up local dynamic symbol handling. We set the contents of |
3968 | various dynamic sections here. */ | |
3969 | ||
3970 | static bfd_boolean | |
3971 | elf_i386_finish_local_dynamic_symbol (void **slot, void *inf) | |
3972 | { | |
3973 | struct elf_link_hash_entry *h | |
3974 | = (struct elf_link_hash_entry *) *slot; | |
3975 | struct bfd_link_info *info | |
23209a78 | 3976 | = (struct bfd_link_info *) inf; |
c25bc9fc L |
3977 | |
3978 | return elf_i386_finish_dynamic_symbol (info->output_bfd, info, | |
3979 | h, NULL); | |
3980 | } | |
3981 | ||
aec6b87e L |
3982 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
3983 | here since undefined weak symbol may not be dynamic and may not be | |
3984 | called for elf_i386_finish_dynamic_symbol. */ | |
3985 | ||
3986 | static bfd_boolean | |
3987 | elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
3988 | void *inf) | |
3989 | { | |
3990 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
3991 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
3992 | ||
3993 | if (h->root.type != bfd_link_hash_undefweak | |
3994 | || h->dynindx != -1) | |
3995 | return TRUE; | |
3996 | ||
3997 | return elf_i386_finish_dynamic_symbol (info->output_bfd, | |
5f0f0847 | 3998 | info, h, NULL); |
aec6b87e L |
3999 | } |
4000 | ||
38701953 AM |
4001 | /* Used to decide how to sort relocs in an optimal manner for the |
4002 | dynamic linker, before writing them out. */ | |
4003 | ||
4004 | static enum elf_reloc_type_class | |
cae1fbbb | 4005 | elf_i386_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
4006 | const asection *rel_sec ATTRIBUTE_UNUSED, |
4007 | const Elf_Internal_Rela *rela) | |
38701953 | 4008 | { |
cae1fbbb L |
4009 | bfd *abfd = info->output_bfd; |
4010 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
4011 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
cae1fbbb | 4012 | |
d9e3b590 L |
4013 | if (htab->dynsym != NULL |
4014 | && htab->dynsym->contents != NULL) | |
4015 | { | |
4016 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
4017 | dynamic symbols. */ | |
4018 | unsigned long r_symndx = ELF32_R_SYM (rela->r_info); | |
c428ce9d L |
4019 | if (r_symndx != STN_UNDEF) |
4020 | { | |
4021 | Elf_Internal_Sym sym; | |
4022 | if (!bed->s->swap_symbol_in (abfd, | |
4023 | (htab->dynsym->contents | |
4024 | + r_symndx * sizeof (Elf32_External_Sym)), | |
4025 | 0, &sym)) | |
4026 | abort (); | |
d9e3b590 | 4027 | |
c428ce9d L |
4028 | if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
4029 | return reloc_class_ifunc; | |
4030 | } | |
d9e3b590 | 4031 | } |
cae1fbbb | 4032 | |
55fd94b0 | 4033 | switch (ELF32_R_TYPE (rela->r_info)) |
38701953 | 4034 | { |
c428ce9d L |
4035 | case R_386_IRELATIVE: |
4036 | return reloc_class_ifunc; | |
38701953 AM |
4037 | case R_386_RELATIVE: |
4038 | return reloc_class_relative; | |
4039 | case R_386_JUMP_SLOT: | |
4040 | return reloc_class_plt; | |
4041 | case R_386_COPY: | |
4042 | return reloc_class_copy; | |
4043 | default: | |
4044 | return reloc_class_normal; | |
4045 | } | |
4046 | } | |
4047 | ||
252b5132 RH |
4048 | /* Finish up the dynamic sections. */ |
4049 | ||
b34976b6 | 4050 | static bfd_boolean |
55fd94b0 AM |
4051 | elf_i386_finish_dynamic_sections (bfd *output_bfd, |
4052 | struct bfd_link_info *info) | |
252b5132 | 4053 | { |
0afcef53 | 4054 | struct elf_x86_link_hash_table *htab; |
252b5132 | 4055 | bfd *dynobj; |
252b5132 | 4056 | asection *sdyn; |
25e762b9 | 4057 | const struct elf_i386_backend_data *abed; |
252b5132 | 4058 | |
0afcef53 | 4059 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 NC |
4060 | if (htab == NULL) |
4061 | return FALSE; | |
4062 | ||
ebe50bae | 4063 | dynobj = htab->elf.dynobj; |
3d4d4302 | 4064 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
25e762b9 | 4065 | abed = get_elf_i386_backend_data (output_bfd); |
252b5132 | 4066 | |
ebe50bae | 4067 | if (htab->elf.dynamic_sections_created) |
252b5132 | 4068 | { |
252b5132 RH |
4069 | Elf32_External_Dyn *dyncon, *dynconend; |
4070 | ||
6de2ae4a | 4071 | if (sdyn == NULL || htab->elf.sgot == NULL) |
ffb2e45b | 4072 | abort (); |
252b5132 RH |
4073 | |
4074 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 4075 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
252b5132 RH |
4076 | for (; dyncon < dynconend; dyncon++) |
4077 | { | |
4078 | Elf_Internal_Dyn dyn; | |
51b64d56 | 4079 | asection *s; |
252b5132 RH |
4080 | |
4081 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
4082 | ||
4083 | switch (dyn.d_tag) | |
4084 | { | |
4085 | default: | |
9a742a90 | 4086 | if (htab->is_vxworks |
25e762b9 | 4087 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) |
7a2b07ff | 4088 | break; |
0ac8d2ca | 4089 | continue; |
252b5132 RH |
4090 | |
4091 | case DT_PLTGOT: | |
6de2ae4a | 4092 | s = htab->elf.sgotplt; |
8c37241b | 4093 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
6725bdbf AM |
4094 | break; |
4095 | ||
252b5132 | 4096 | case DT_JMPREL: |
6de2ae4a | 4097 | s = htab->elf.srelplt; |
6348e046 | 4098 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
252b5132 RH |
4099 | break; |
4100 | ||
4101 | case DT_PLTRELSZ: | |
6de2ae4a | 4102 | s = htab->elf.srelplt; |
eea6121a | 4103 | dyn.d_un.d_val = s->size; |
252b5132 | 4104 | break; |
252b5132 | 4105 | } |
0ac8d2ca AM |
4106 | |
4107 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
252b5132 RH |
4108 | } |
4109 | ||
6de2ae4a | 4110 | if (htab->elf.splt && htab->elf.splt->size > 0) |
252b5132 | 4111 | { |
1f78f649 L |
4112 | /* UnixWare sets the entsize of .plt to 4, although that doesn't |
4113 | really seem like the right value. */ | |
4114 | elf_section_data (htab->elf.splt->output_section) | |
4115 | ->this_hdr.sh_entsize = 4; | |
4116 | ||
765e526c | 4117 | if (htab->plt.has_plt0) |
252b5132 | 4118 | { |
f604c2a2 L |
4119 | /* Fill in the special first entry in the procedure linkage |
4120 | table. */ | |
765e526c L |
4121 | memcpy (htab->elf.splt->contents, htab->plt.plt0_entry, |
4122 | htab->lazy_plt->plt0_entry_size); | |
4123 | memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size, | |
25e762b9 | 4124 | abed->plt0_pad_byte, |
765e526c | 4125 | htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size); |
f604c2a2 | 4126 | if (!bfd_link_pic (info)) |
eac338cf | 4127 | { |
f604c2a2 L |
4128 | bfd_put_32 (output_bfd, |
4129 | (htab->elf.sgotplt->output_section->vma | |
4130 | + htab->elf.sgotplt->output_offset | |
4131 | + 4), | |
4132 | htab->elf.splt->contents | |
765e526c | 4133 | + htab->lazy_plt->plt0_got1_offset); |
f604c2a2 L |
4134 | bfd_put_32 (output_bfd, |
4135 | (htab->elf.sgotplt->output_section->vma | |
4136 | + htab->elf.sgotplt->output_offset | |
4137 | + 8), | |
4138 | htab->elf.splt->contents | |
765e526c | 4139 | + htab->lazy_plt->plt0_got2_offset); |
eac338cf | 4140 | |
9a742a90 | 4141 | if (htab->is_vxworks) |
1f78f649 | 4142 | { |
f604c2a2 L |
4143 | Elf_Internal_Rela rel; |
4144 | int num_plts = (htab->elf.splt->size | |
765e526c | 4145 | / htab->plt.plt_entry_size) - 1; |
f604c2a2 | 4146 | unsigned char *p; |
765e526c | 4147 | asection *srelplt2 = htab->srelplt2; |
f604c2a2 L |
4148 | |
4149 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ | |
4150 | + 4. On IA32 we use REL relocations so the | |
4151 | addend goes in the PLT directly. */ | |
4152 | rel.r_offset = (htab->elf.splt->output_section->vma | |
4153 | + htab->elf.splt->output_offset | |
765e526c | 4154 | + htab->lazy_plt->plt0_got1_offset); |
1f78f649 L |
4155 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, |
4156 | R_386_32); | |
f604c2a2 | 4157 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
0afcef53 | 4158 | srelplt2->contents); |
f604c2a2 L |
4159 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ |
4160 | + 8. */ | |
4161 | rel.r_offset = (htab->elf.splt->output_section->vma | |
4162 | + htab->elf.splt->output_offset | |
765e526c | 4163 | + htab->lazy_plt->plt0_got2_offset); |
f604c2a2 | 4164 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, |
1f78f649 | 4165 | R_386_32); |
f604c2a2 | 4166 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
0afcef53 | 4167 | srelplt2->contents + |
f604c2a2 L |
4168 | sizeof (Elf32_External_Rel)); |
4169 | /* Correct the .rel.plt.unloaded relocations. */ | |
0afcef53 | 4170 | p = srelplt2->contents; |
f604c2a2 L |
4171 | if (bfd_link_pic (info)) |
4172 | p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel); | |
4173 | else | |
4174 | p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel); | |
4175 | ||
4176 | for (; num_plts; num_plts--) | |
4177 | { | |
4178 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
4179 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, | |
4180 | R_386_32); | |
4181 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); | |
4182 | p += sizeof (Elf32_External_Rel); | |
4183 | ||
4184 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
4185 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, | |
4186 | R_386_32); | |
4187 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); | |
4188 | p += sizeof (Elf32_External_Rel); | |
4189 | } | |
1f78f649 | 4190 | } |
eac338cf PB |
4191 | } |
4192 | } | |
252b5132 | 4193 | } |
f604c2a2 L |
4194 | |
4195 | if (htab->plt_got != NULL && htab->plt_got->size > 0) | |
4196 | elf_section_data (htab->plt_got->output_section) | |
765e526c | 4197 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; |
ee2fdd6f L |
4198 | |
4199 | if (htab->plt_second != NULL && htab->plt_second->size > 0) | |
4200 | elf_section_data (htab->plt_second->output_section) | |
765e526c | 4201 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; |
252b5132 RH |
4202 | } |
4203 | ||
f604c2a2 L |
4204 | /* Fill in the first three entries in the global offset table. */ |
4205 | if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0) | |
252b5132 | 4206 | { |
56d4289c L |
4207 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
4208 | { | |
4eca0228 | 4209 | _bfd_error_handler |
56d4289c L |
4210 | (_("discarded output section: `%A'"), htab->elf.sgotplt); |
4211 | return FALSE; | |
4212 | } | |
4213 | ||
f604c2a2 L |
4214 | bfd_put_32 (output_bfd, |
4215 | (sdyn == NULL ? 0 | |
4216 | : sdyn->output_section->vma + sdyn->output_offset), | |
4217 | htab->elf.sgotplt->contents); | |
4218 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4); | |
4219 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8); | |
252b5132 | 4220 | |
6de2ae4a | 4221 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4; |
12d0ee4a | 4222 | } |
8c37241b | 4223 | |
e41b3a13 | 4224 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
4225 | if (htab->plt_eh_frame != NULL |
4226 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
4227 | { |
4228 | if (htab->elf.splt != NULL | |
4229 | && htab->elf.splt->size != 0 | |
4230 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
4231 | && htab->elf.splt->output_section != NULL | |
4232 | && htab->plt_eh_frame->output_section != NULL) | |
4233 | { | |
4234 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
4235 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
4236 | + htab->plt_eh_frame->output_offset | |
4237 | + PLT_FDE_START_OFFSET; | |
4238 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
4239 | htab->plt_eh_frame->contents | |
4240 | + PLT_FDE_START_OFFSET); | |
4241 | } | |
4242 | if (htab->plt_eh_frame->sec_info_type | |
dbaa2011 | 4243 | == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
4244 | { |
4245 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
4246 | htab->plt_eh_frame, | |
4247 | htab->plt_eh_frame->contents)) | |
4248 | return FALSE; | |
4249 | } | |
4250 | } | |
4251 | ||
fff53dae L |
4252 | /* Adjust .eh_frame for .plt.got section. */ |
4253 | if (htab->plt_got_eh_frame != NULL | |
4254 | && htab->plt_got_eh_frame->contents != NULL) | |
4255 | { | |
4256 | if (htab->plt_got != NULL | |
4257 | && htab->plt_got->size != 0 | |
4258 | && (htab->plt_got->flags & SEC_EXCLUDE) == 0 | |
4259 | && htab->plt_got->output_section != NULL | |
4260 | && htab->plt_got_eh_frame->output_section != NULL) | |
4261 | { | |
4262 | bfd_vma plt_start = htab->plt_got->output_section->vma; | |
4263 | bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma | |
4264 | + htab->plt_got_eh_frame->output_offset | |
4265 | + PLT_FDE_START_OFFSET; | |
4266 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
4267 | htab->plt_got_eh_frame->contents | |
4268 | + PLT_FDE_START_OFFSET); | |
4269 | } | |
4270 | if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
4271 | { | |
4272 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
4273 | htab->plt_got_eh_frame, | |
4274 | htab->plt_got_eh_frame->contents)) | |
4275 | return FALSE; | |
4276 | } | |
4277 | } | |
4278 | ||
ee2fdd6f L |
4279 | /* Adjust .eh_frame for the second PLT section. */ |
4280 | if (htab->plt_second_eh_frame != NULL | |
4281 | && htab->plt_second_eh_frame->contents != NULL) | |
4282 | { | |
4283 | if (htab->plt_second != NULL | |
4284 | && htab->plt_second->size != 0 | |
4285 | && (htab->plt_second->flags & SEC_EXCLUDE) == 0 | |
4286 | && htab->plt_second->output_section != NULL | |
4287 | && htab->plt_second_eh_frame->output_section != NULL) | |
4288 | { | |
4289 | bfd_vma plt_start = htab->plt_second->output_section->vma; | |
4290 | bfd_vma eh_frame_start | |
4291 | = (htab->plt_second_eh_frame->output_section->vma | |
4292 | + htab->plt_second_eh_frame->output_offset | |
4293 | + PLT_FDE_START_OFFSET); | |
4294 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
4295 | htab->plt_second_eh_frame->contents | |
4296 | + PLT_FDE_START_OFFSET); | |
4297 | } | |
4298 | if (htab->plt_second_eh_frame->sec_info_type | |
4299 | == SEC_INFO_TYPE_EH_FRAME) | |
4300 | { | |
4301 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
4302 | htab->plt_second_eh_frame, | |
4303 | htab->plt_second_eh_frame->contents)) | |
4304 | return FALSE; | |
4305 | } | |
4306 | } | |
4307 | ||
6de2ae4a L |
4308 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
4309 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4; | |
8c37241b | 4310 | |
aec6b87e L |
4311 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
4312 | if (bfd_link_pie (info)) | |
4313 | bfd_hash_traverse (&info->hash->table, | |
4314 | elf_i386_pie_finish_undefweak_symbol, | |
4315 | info); | |
4316 | ||
b34976b6 | 4317 | return TRUE; |
252b5132 RH |
4318 | } |
4319 | ||
233cc9c1 L |
4320 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
4321 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
4322 | It has to be done before elf_link_sort_relocs is called so that | |
4323 | dynamic relocations are properly sorted. */ | |
4324 | ||
4325 | static bfd_boolean | |
4326 | elf_i386_output_arch_local_syms | |
4327 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
4328 | struct bfd_link_info *info, | |
4329 | void *flaginfo ATTRIBUTE_UNUSED, | |
4330 | int (*func) (void *, const char *, | |
4331 | Elf_Internal_Sym *, | |
4332 | asection *, | |
4333 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
4334 | { | |
0afcef53 L |
4335 | struct elf_x86_link_hash_table *htab |
4336 | = elf_x86_hash_table (info, I386_ELF_DATA); | |
233cc9c1 L |
4337 | if (htab == NULL) |
4338 | return FALSE; | |
4339 | ||
4340 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
4341 | htab_traverse (htab->loc_hash_table, | |
4342 | elf_i386_finish_local_dynamic_symbol, | |
4343 | info); | |
4344 | ||
4345 | return TRUE; | |
4346 | } | |
4347 | ||
f604c2a2 | 4348 | /* Forward declaration. */ |
765e526c | 4349 | static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt; |
f604c2a2 L |
4350 | |
4351 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all | |
4352 | dynamic relocations. */ | |
4353 | ||
4354 | static long | |
4355 | elf_i386_get_synthetic_symtab (bfd *abfd, | |
4356 | long symcount ATTRIBUTE_UNUSED, | |
4357 | asymbol **syms ATTRIBUTE_UNUSED, | |
4358 | long dynsymcount, | |
4359 | asymbol **dynsyms, | |
4360 | asymbol **ret) | |
4361 | { | |
f493882d | 4362 | long count, i, n; |
f604c2a2 | 4363 | int j; |
f604c2a2 | 4364 | bfd_byte *plt_contents; |
f493882d | 4365 | long relsize; |
765e526c L |
4366 | const struct elf_x86_lazy_plt_layout *lazy_plt; |
4367 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
4368 | const struct elf_x86_lazy_plt_layout *lazy_ibt_plt; | |
4369 | const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt; | |
f604c2a2 L |
4370 | asection *plt; |
4371 | bfd_vma got_addr; | |
f493882d L |
4372 | enum elf_x86_plt_type plt_type; |
4373 | struct elf_x86_plt plts[] = | |
3972882e | 4374 | { |
f493882d L |
4375 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
4376 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
4377 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
4378 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } | |
f604c2a2 | 4379 | }; |
144bed8d | 4380 | |
f604c2a2 | 4381 | *ret = NULL; |
144bed8d | 4382 | |
f604c2a2 L |
4383 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
4384 | return 0; | |
3972882e | 4385 | |
f604c2a2 L |
4386 | if (dynsymcount <= 0) |
4387 | return 0; | |
cca5b8b6 | 4388 | |
f604c2a2 L |
4389 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
4390 | if (relsize <= 0) | |
4391 | return -1; | |
cca5b8b6 | 4392 | |
f604c2a2 L |
4393 | non_lazy_plt = NULL; |
4394 | /* Silence GCC 6. */ | |
4395 | lazy_plt = NULL; | |
ee2fdd6f L |
4396 | non_lazy_ibt_plt = NULL; |
4397 | lazy_ibt_plt = NULL; | |
f604c2a2 | 4398 | switch (get_elf_i386_backend_data (abfd)->os) |
144bed8d | 4399 | { |
f604c2a2 L |
4400 | case is_normal: |
4401 | non_lazy_plt = &elf_i386_non_lazy_plt; | |
ee2fdd6f L |
4402 | lazy_ibt_plt = &elf_i386_lazy_ibt_plt; |
4403 | non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt; | |
f604c2a2 L |
4404 | /* Fall through */ |
4405 | case is_vxworks: | |
4406 | lazy_plt = &elf_i386_lazy_plt; | |
4407 | break; | |
4408 | case is_nacl: | |
4409 | lazy_plt = &elf_i386_nacl_plt; | |
4410 | break; | |
4411 | } | |
4412 | ||
4413 | got_addr = 0; | |
3972882e | 4414 | |
f604c2a2 L |
4415 | count = 0; |
4416 | for (j = 0; plts[j].name != NULL; j++) | |
4417 | { | |
4418 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
90efb642 | 4419 | if (plt == NULL || plt->size == 0) |
6f25f223 | 4420 | continue; |
533d0af0 | 4421 | |
f604c2a2 L |
4422 | /* Get the PLT section contents. */ |
4423 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
4424 | if (plt_contents == NULL) | |
4425 | break; | |
4426 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
4427 | plt_contents, 0, plt->size)) | |
4428 | { | |
4429 | free (plt_contents); | |
4430 | break; | |
4431 | } | |
4432 | ||
4433 | /* Check what kind of PLT it is. */ | |
4434 | plt_type = plt_unknown; | |
90efb642 L |
4435 | if (plts[j].type == plt_unknown |
4436 | && (plt->size >= (lazy_plt->plt0_entry_size | |
4437 | + lazy_plt->plt_entry_size))) | |
f604c2a2 L |
4438 | { |
4439 | /* Match lazy PLT first. */ | |
4440 | if (memcmp (plt_contents, lazy_plt->plt0_entry, | |
4441 | lazy_plt->plt0_got1_offset) == 0) | |
ee2fdd6f L |
4442 | { |
4443 | /* The fist entry in the lazy IBT PLT is the same as the | |
4444 | normal lazy PLT. */ | |
4445 | if (lazy_ibt_plt != NULL | |
90efb642 | 4446 | && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size, |
ee2fdd6f L |
4447 | lazy_ibt_plt->plt_entry, |
4448 | lazy_ibt_plt->plt_got_offset) == 0)) | |
4449 | plt_type = plt_lazy | plt_second; | |
4450 | else | |
4451 | plt_type = plt_lazy; | |
4452 | } | |
f604c2a2 L |
4453 | else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry, |
4454 | lazy_plt->plt0_got1_offset) == 0) | |
ee2fdd6f L |
4455 | { |
4456 | /* The fist entry in the PIC lazy IBT PLT is the same as | |
4457 | the normal PIC lazy PLT. */ | |
4458 | if (lazy_ibt_plt != NULL | |
90efb642 | 4459 | && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size, |
ee2fdd6f L |
4460 | lazy_ibt_plt->pic_plt_entry, |
4461 | lazy_ibt_plt->plt_got_offset) == 0)) | |
4462 | plt_type = plt_lazy | plt_pic | plt_second; | |
4463 | else | |
4464 | plt_type = plt_lazy | plt_pic; | |
4465 | } | |
f604c2a2 L |
4466 | } |
4467 | ||
4468 | if (non_lazy_plt != NULL | |
90efb642 L |
4469 | && (plt_type == plt_unknown || plt_type == plt_non_lazy) |
4470 | && plt->size >= non_lazy_plt->plt_entry_size) | |
f604c2a2 L |
4471 | { |
4472 | /* Match non-lazy PLT. */ | |
4473 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
4474 | non_lazy_plt->plt_got_offset) == 0) | |
4475 | plt_type = plt_non_lazy; | |
4476 | else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry, | |
4477 | non_lazy_plt->plt_got_offset) == 0) | |
4478 | plt_type = plt_pic; | |
4479 | } | |
4480 | ||
ee2fdd6f | 4481 | if ((non_lazy_ibt_plt != NULL) |
90efb642 L |
4482 | && (plt_type == plt_unknown || plt_type == plt_second) |
4483 | && plt->size >= non_lazy_ibt_plt->plt_entry_size) | |
ee2fdd6f L |
4484 | { |
4485 | if (memcmp (plt_contents, | |
4486 | non_lazy_ibt_plt->plt_entry, | |
4487 | non_lazy_ibt_plt->plt_got_offset) == 0) | |
4488 | { | |
4489 | /* Match IBT PLT. */ | |
4490 | plt_type = plt_second; | |
4491 | non_lazy_plt = non_lazy_ibt_plt; | |
4492 | } | |
4493 | else if (memcmp (plt_contents, | |
4494 | non_lazy_ibt_plt->pic_plt_entry, | |
4495 | non_lazy_ibt_plt->plt_got_offset) == 0) | |
4496 | { | |
4497 | /* Match PIC IBT PLT. */ | |
4498 | plt_type = plt_second | plt_pic; | |
4499 | non_lazy_plt = non_lazy_ibt_plt; | |
4500 | } | |
4501 | } | |
4502 | ||
f604c2a2 | 4503 | if (plt_type == plt_unknown) |
37c0b6ee L |
4504 | { |
4505 | free (plt_contents); | |
4506 | continue; | |
4507 | } | |
3972882e | 4508 | |
f604c2a2 L |
4509 | plts[j].sec = plt; |
4510 | plts[j].type = plt_type; | |
ec1f73bb | 4511 | |
f604c2a2 L |
4512 | if ((plt_type & plt_lazy)) |
4513 | { | |
4514 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
4515 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
4516 | /* Skip PLT0 in lazy PLT. */ | |
4517 | i = 1; | |
4518 | } | |
4519 | else | |
4520 | { | |
4521 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
4522 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
4523 | i = 0; | |
4524 | } | |
fca6ae69 | 4525 | |
ee2fdd6f L |
4526 | /* Skip lazy PLT when the second PLT is used. */ |
4527 | if ((plt_type & (plt_lazy | plt_second)) | |
4528 | == (plt_lazy | plt_second)) | |
4529 | plts[j].count = 0; | |
4530 | else | |
4531 | { | |
4532 | n = plt->size / plts[j].plt_entry_size; | |
4533 | plts[j].count = n; | |
4534 | count += n - i; | |
4535 | } | |
f604c2a2 L |
4536 | |
4537 | plts[j].contents = plt_contents; | |
4538 | ||
4539 | /* The _GLOBAL_OFFSET_TABLE_ address is needed. */ | |
4540 | if ((plt_type & plt_pic)) | |
4541 | got_addr = (bfd_vma) -1; | |
144bed8d L |
4542 | } |
4543 | ||
f493882d L |
4544 | return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize, |
4545 | got_addr, plts, dynsyms, | |
4546 | ret); | |
4c45e5c9 JJ |
4547 | } |
4548 | ||
f604c2a2 L |
4549 | /* Set up i386 GNU properties. Return the first relocatable ELF input |
4550 | with GNU properties if found. Otherwise, return NULL. */ | |
4551 | ||
4552 | static bfd * | |
4553 | elf_i386_link_setup_gnu_properties (struct bfd_link_info *info) | |
4554 | { | |
1de031c8 | 4555 | struct elf_x86_init_table init_table; |
f604c2a2 | 4556 | |
1de031c8 L |
4557 | init_table.normal_target = FALSE; |
4558 | init_table.is_vxworks = FALSE; | |
f604c2a2 L |
4559 | switch (get_elf_i386_backend_data (info->output_bfd)->os) |
4560 | { | |
4561 | case is_normal: | |
1de031c8 L |
4562 | init_table.lazy_plt = &elf_i386_lazy_plt; |
4563 | init_table.non_lazy_plt = &elf_i386_non_lazy_plt; | |
4564 | init_table.lazy_ibt_plt = &elf_i386_lazy_ibt_plt; | |
4565 | init_table.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt; | |
4566 | init_table.normal_target = TRUE; | |
f604c2a2 L |
4567 | break; |
4568 | case is_vxworks: | |
1de031c8 L |
4569 | init_table.lazy_plt = &elf_i386_lazy_plt; |
4570 | init_table.non_lazy_plt = NULL; | |
4571 | init_table.lazy_ibt_plt = NULL; | |
4572 | init_table.non_lazy_ibt_plt = NULL; | |
4573 | init_table.is_vxworks = TRUE; | |
f604c2a2 L |
4574 | break; |
4575 | case is_nacl: | |
1de031c8 L |
4576 | init_table.lazy_plt = &elf_i386_nacl_plt; |
4577 | init_table.non_lazy_plt = NULL; | |
4578 | init_table.lazy_ibt_plt = NULL; | |
4579 | init_table.non_lazy_ibt_plt = NULL; | |
f604c2a2 L |
4580 | break; |
4581 | } | |
4582 | ||
1de031c8 L |
4583 | init_table.r_info = elf32_r_info; |
4584 | init_table.r_sym = elf32_r_sym; | |
7a382c1c | 4585 | |
1de031c8 | 4586 | return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table); |
f604c2a2 L |
4587 | } |
4588 | ||
6d00b590 | 4589 | #define TARGET_LITTLE_SYM i386_elf32_vec |
252b5132 RH |
4590 | #define TARGET_LITTLE_NAME "elf32-i386" |
4591 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 4592 | #define ELF_TARGET_ID I386_ELF_DATA |
252b5132 RH |
4593 | #define ELF_MACHINE_CODE EM_386 |
4594 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
4595 | |
4596 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 4597 | #define elf_backend_can_refcount 1 |
252b5132 RH |
4598 | #define elf_backend_want_got_plt 1 |
4599 | #define elf_backend_plt_readonly 1 | |
4600 | #define elf_backend_want_plt_sym 0 | |
4601 | #define elf_backend_got_header_size 12 | |
e41b3a13 | 4602 | #define elf_backend_plt_alignment 4 |
64f52338 | 4603 | #define elf_backend_dtrel_excludes_plt 1 |
f7483970 | 4604 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 4605 | #define elf_backend_caches_rawsize 1 |
5474d94f | 4606 | #define elf_backend_want_dynrelro 1 |
252b5132 | 4607 | |
8c29f035 AM |
4608 | /* Support RELA for objdump of prelink objects. */ |
4609 | #define elf_info_to_howto elf_i386_info_to_howto_rel | |
dd5724d5 AM |
4610 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel |
4611 | ||
dd5724d5 | 4612 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
dd5724d5 | 4613 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup |
13285a1b | 4614 | #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup |
3972882e | 4615 | #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab |
dd5724d5 | 4616 | |
13285a1b | 4617 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
dd5724d5 | 4618 | #define elf_backend_check_relocs elf_i386_check_relocs |
f604c2a2 | 4619 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
0ac8d2ca | 4620 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
4621 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
4622 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
233cc9c1 | 4623 | #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms |
c5fccbec DJ |
4624 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
4625 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 4626 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca | 4627 | #define elf_backend_relocate_section elf_i386_relocate_section |
f604c2a2 | 4628 | #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties |
dd5724d5 | 4629 | |
252b5132 | 4630 | #include "elf32-target.h" |
2bc3c89a AM |
4631 | |
4632 | /* FreeBSD support. */ | |
4633 | ||
4634 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 4635 | #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec |
2bc3c89a AM |
4636 | #undef TARGET_LITTLE_NAME |
4637 | #define TARGET_LITTLE_NAME "elf32-i386-freebsd" | |
d1036acb L |
4638 | #undef ELF_OSABI |
4639 | #define ELF_OSABI ELFOSABI_FREEBSD | |
2bc3c89a AM |
4640 | |
4641 | /* The kernel recognizes executables as valid only if they carry a | |
4642 | "FreeBSD" label in the ELF header. So we put this label on all | |
4643 | executables and (for simplicity) also all other object files. */ | |
4644 | ||
2bc3c89a | 4645 | static void |
d8045f23 | 4646 | elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info) |
2bc3c89a | 4647 | { |
78245035 | 4648 | _bfd_elf_post_process_headers (abfd, info); |
2bc3c89a | 4649 | |
2bc3c89a | 4650 | #ifdef OLD_FREEBSD_ABI_LABEL |
cf7363b4 L |
4651 | { |
4652 | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ | |
4653 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
4654 | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); | |
4655 | } | |
caf47ea6 | 4656 | #endif |
2bc3c89a AM |
4657 | } |
4658 | ||
4659 | #undef elf_backend_post_process_headers | |
d8045f23 | 4660 | #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers |
571fe01f NC |
4661 | #undef elf32_bed |
4662 | #define elf32_bed elf32_i386_fbsd_bed | |
2bc3c89a | 4663 | |
d8045f23 NC |
4664 | #undef elf_backend_add_symbol_hook |
4665 | ||
2bc3c89a | 4666 | #include "elf32-target.h" |
eac338cf | 4667 | |
a6cc6b3b RO |
4668 | /* Solaris 2. */ |
4669 | ||
4670 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 4671 | #define TARGET_LITTLE_SYM i386_elf32_sol2_vec |
a6cc6b3b RO |
4672 | #undef TARGET_LITTLE_NAME |
4673 | #define TARGET_LITTLE_NAME "elf32-i386-sol2" | |
4674 | ||
914082d1 L |
4675 | #undef elf_backend_post_process_headers |
4676 | ||
a6cc6b3b RO |
4677 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE |
4678 | objects won't be recognized. */ | |
4679 | #undef ELF_OSABI | |
4680 | ||
4681 | #undef elf32_bed | |
4682 | #define elf32_bed elf32_i386_sol2_bed | |
4683 | ||
7dc98aea RO |
4684 | /* The 32-bit static TLS arena size is rounded to the nearest 8-byte |
4685 | boundary. */ | |
84865015 | 4686 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
4687 | #define elf_backend_static_tls_alignment 8 |
4688 | ||
a6cc6b3b RO |
4689 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
4690 | ||
4691 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
4692 | File, p.63. */ | |
84865015 | 4693 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
4694 | #define elf_backend_want_plt_sym 1 |
4695 | ||
84865015 NC |
4696 | #undef elf_backend_strtab_flags |
4697 | #define elf_backend_strtab_flags SHF_STRINGS | |
4698 | ||
5522f910 NC |
4699 | /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which |
4700 | has a type >= SHT_LOOS. Returns TRUE if these fields were initialised | |
4701 | FALSE otherwise. ISECTION is the best guess matching section from the | |
4702 | input bfd IBFD, but it might be NULL. */ | |
4703 | ||
84865015 | 4704 | static bfd_boolean |
5522f910 NC |
4705 | elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
4706 | bfd *obfd ATTRIBUTE_UNUSED, | |
4707 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
4708 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
4709 | { |
4710 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
5522f910 NC |
4711 | and sh_link fields of Solaris specific section types. */ |
4712 | return FALSE; | |
84865015 | 4713 | |
5522f910 | 4714 | /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13, |
84865015 NC |
4715 | Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation: |
4716 | ||
4717 | http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc | |
4718 | ||
4719 | The following values should be set: | |
4720 | ||
4721 | Type Link Info | |
4722 | ----------------------------------------------------------------------------- | |
4723 | SHT_SUNW_ancillary The section header index of 0 | |
4724 | [0x6fffffee] the associated string table. | |
4725 | ||
4726 | SHT_SUNW_capinfo The section header index of For a dynamic object, the | |
4727 | [0x6ffffff0] the associated symbol table. section header index of | |
4728 | the associated | |
4729 | SHT_SUNW_capchain table, | |
4730 | otherwise 0. | |
4731 | ||
4732 | SHT_SUNW_symsort The section header index of 0 | |
4733 | [0x6ffffff1] the associated symbol table. | |
4734 | ||
4735 | SHT_SUNW_tlssort The section header index of 0 | |
4736 | [0x6ffffff2] the associated symbol table. | |
4737 | ||
4738 | SHT_SUNW_LDYNSYM The section header index of One greater than the | |
4739 | [0x6ffffff3] the associated string table. symbol table index of the | |
4740 | This index is the same string last local symbol, | |
4741 | table used by the SHT_DYNSYM STB_LOCAL. Since | |
4742 | section. SHT_SUNW_LDYNSYM only | |
4743 | contains local symbols, | |
4744 | sh_info is equivalent to | |
4745 | the number of symbols in | |
4746 | the table. | |
4747 | ||
4748 | SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer | |
4749 | [0x6ffffff5] the section header index of to named strings, the | |
4750 | the associated section header index of | |
4751 | SHT_SUNW_capinfo table, the associated string | |
4752 | otherwise 0. table, otherwise 0. | |
4753 | ||
4754 | SHT_SUNW_move The section header index of 0 | |
4755 | [0x6ffffffa] the associated symbol table. | |
4756 | ||
4757 | SHT_SUNW_COMDAT 0 0 | |
4758 | [0x6ffffffb] | |
4759 | ||
4760 | SHT_SUNW_syminfo The section header index of The section header index | |
4761 | [0x6ffffffc] the associated symbol table. of the associated | |
4762 | .dynamic section. | |
4763 | ||
4764 | SHT_SUNW_verdef The section header index of The number of version | |
4765 | [0x6ffffffd] the associated string table. definitions within the | |
4766 | section. | |
4767 | ||
4768 | SHT_SUNW_verneed The section header index of The number of version | |
4769 | [0x6ffffffe] the associated string table. dependencies within the | |
4770 | section. | |
4771 | ||
4772 | SHT_SUNW_versym The section header index of 0 | |
4773 | [0x6fffffff] the associated symbol table. */ | |
84865015 NC |
4774 | } |
4775 | ||
5522f910 NC |
4776 | #undef elf_backend_copy_special_section_fields |
4777 | #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields | |
84865015 | 4778 | |
a6cc6b3b RO |
4779 | #include "elf32-target.h" |
4780 | ||
bf64a951 L |
4781 | /* Intel MCU support. */ |
4782 | ||
4783 | static bfd_boolean | |
4784 | elf32_iamcu_elf_object_p (bfd *abfd) | |
4785 | { | |
4786 | /* Set the right machine number for an IAMCU elf32 file. */ | |
4787 | bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu); | |
4788 | return TRUE; | |
4789 | } | |
4790 | ||
4791 | #undef TARGET_LITTLE_SYM | |
4792 | #define TARGET_LITTLE_SYM iamcu_elf32_vec | |
4793 | #undef TARGET_LITTLE_NAME | |
4794 | #define TARGET_LITTLE_NAME "elf32-iamcu" | |
84865015 | 4795 | #undef ELF_ARCH |
bf64a951 L |
4796 | #define ELF_ARCH bfd_arch_iamcu |
4797 | ||
4798 | #undef ELF_MACHINE_CODE | |
4799 | #define ELF_MACHINE_CODE EM_IAMCU | |
4800 | ||
4801 | #undef ELF_OSABI | |
4802 | ||
4803 | #undef elf32_bed | |
4804 | #define elf32_bed elf32_iamcu_bed | |
4805 | ||
4806 | #undef elf_backend_object_p | |
4807 | #define elf_backend_object_p elf32_iamcu_elf_object_p | |
4808 | ||
4809 | #undef elf_backend_static_tls_alignment | |
4810 | ||
4811 | #undef elf_backend_want_plt_sym | |
4812 | #define elf_backend_want_plt_sym 0 | |
4813 | ||
84865015 | 4814 | #undef elf_backend_strtab_flags |
5522f910 | 4815 | #undef elf_backend_copy_special_section_fields |
84865015 | 4816 | |
bf64a951 L |
4817 | #include "elf32-target.h" |
4818 | ||
4819 | /* Restore defaults. */ | |
4820 | #undef ELF_ARCH | |
4821 | #define ELF_ARCH bfd_arch_i386 | |
4822 | #undef ELF_MACHINE_CODE | |
4823 | #define ELF_MACHINE_CODE EM_386 | |
4824 | ||
a27e4371 RM |
4825 | /* Native Client support. */ |
4826 | ||
4827 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 4828 | #define TARGET_LITTLE_SYM i386_elf32_nacl_vec |
a27e4371 RM |
4829 | #undef TARGET_LITTLE_NAME |
4830 | #define TARGET_LITTLE_NAME "elf32-i386-nacl" | |
4831 | #undef elf32_bed | |
4832 | #define elf32_bed elf32_i386_nacl_bed | |
4833 | ||
4834 | #undef ELF_MAXPAGESIZE | |
4835 | #define ELF_MAXPAGESIZE 0x10000 | |
4836 | ||
4837 | /* Restore defaults. */ | |
4838 | #undef ELF_OSABI | |
4839 | #undef elf_backend_want_plt_sym | |
4840 | #define elf_backend_want_plt_sym 0 | |
4841 | #undef elf_backend_post_process_headers | |
a27e4371 RM |
4842 | #undef elf_backend_static_tls_alignment |
4843 | ||
4844 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
4845 | ||
4846 | #undef elf_backend_plt_alignment | |
4847 | #define elf_backend_plt_alignment 5 | |
4848 | #define NACL_PLT_ENTRY_SIZE 64 | |
4849 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
4850 | ||
4851 | static const bfd_byte elf_i386_nacl_plt0_entry[] = | |
4852 | { | |
4853 | 0xff, 0x35, /* pushl contents of address */ | |
4854 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
4855 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
4856 | 0, 0, 0, 0, /* replaced with address of .got + 8. */ | |
4857 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
4858 | 0xff, 0xe1 /* jmp *%ecx */ | |
4859 | }; | |
4860 | ||
4861 | static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
4862 | { | |
4863 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
4864 | 0, 0, 0, 0, /* replaced with GOT slot address. */ | |
4865 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
4866 | 0xff, 0xe1, /* jmp *%ecx */ | |
4867 | ||
4868 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
4869 | 0x90, | |
4870 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4871 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4872 | ||
4873 | /* Lazy GOT entries point here (32-byte aligned). */ | |
4874 | 0x68, /* pushl immediate */ | |
4875 | 0, 0, 0, 0, /* replaced with reloc offset. */ | |
4876 | 0xe9, /* jmp relative */ | |
4877 | 0, 0, 0, 0, /* replaced with offset to .plt. */ | |
4878 | ||
4879 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
4880 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4881 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4882 | 0x90, 0x90 | |
4883 | }; | |
4884 | ||
4885 | static const bfd_byte | |
4886 | elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] = | |
4887 | { | |
4888 | 0xff, 0x73, 0x04, /* pushl 4(%ebx) */ | |
4889 | 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */ | |
4890 | 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */ | |
4891 | 0xff, 0xe1, /* jmp *%ecx */ | |
caa0075c RM |
4892 | |
4893 | /* This is expected to be the same size as elf_i386_nacl_plt0_entry, | |
4894 | so pad to that size with nop instructions. */ | |
4895 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 | |
a27e4371 RM |
4896 | }; |
4897 | ||
4898 | static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
4899 | { | |
4900 | 0x8b, 0x8b, /* movl offset(%ebx), %ecx */ | |
4901 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
4902 | 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */ | |
4903 | 0xff, 0xe1, /* jmp *%ecx */ | |
4904 | ||
4905 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
4906 | 0x90, | |
4907 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4908 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4909 | ||
4910 | /* Lazy GOT entries point here (32-byte aligned). */ | |
4911 | 0x68, /* pushl immediate */ | |
4912 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
4913 | 0xe9, /* jmp relative */ | |
4914 | 0, 0, 0, 0, /* replaced with offset to start of .plt. */ | |
4915 | ||
4916 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
4917 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4918 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4919 | 0x90, 0x90 | |
4920 | }; | |
4921 | ||
4922 | static const bfd_byte elf_i386_nacl_eh_frame_plt[] = | |
4923 | { | |
4924 | #if (PLT_CIE_LENGTH != 20 \ | |
4925 | || PLT_FDE_LENGTH != 36 \ | |
4926 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
4927 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
4928 | # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!" | |
4929 | #endif | |
4930 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
4931 | 0, 0, 0, 0, /* CIE ID */ | |
4932 | 1, /* CIE version */ | |
4933 | 'z', 'R', 0, /* Augmentation string */ | |
4934 | 1, /* Code alignment factor */ | |
4935 | 0x7c, /* Data alignment factor: -4 */ | |
4936 | 8, /* Return address column */ | |
4937 | 1, /* Augmentation size */ | |
4938 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
4939 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
4940 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
4941 | DW_CFA_nop, DW_CFA_nop, | |
4942 | ||
4943 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
4944 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
4945 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
4946 | 0, 0, 0, 0, /* .plt size goes here */ | |
4947 | 0, /* Augmentation size */ | |
4948 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
4949 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
4950 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
4951 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
4952 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
4953 | 13, /* Block length */ | |
4954 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
4955 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
4956 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
4957 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, | |
4958 | DW_CFA_nop, DW_CFA_nop | |
4959 | }; | |
4960 | ||
765e526c | 4961 | static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt = |
a27e4371 RM |
4962 | { |
4963 | elf_i386_nacl_plt0_entry, /* plt0_entry */ | |
4964 | sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */ | |
a27e4371 RM |
4965 | elf_i386_nacl_plt_entry, /* plt_entry */ |
4966 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
765e526c L |
4967 | 2, /* plt0_got1_offset */ |
4968 | 8, /* plt0_got2_offset */ | |
4969 | 0, /* plt0_got2_insn_end */ | |
a27e4371 RM |
4970 | 2, /* plt_got_offset */ |
4971 | 33, /* plt_reloc_offset */ | |
4972 | 38, /* plt_plt_offset */ | |
765e526c L |
4973 | 0, /* plt_got_insn_size */ |
4974 | 0, /* plt_plt_insn_end */ | |
a27e4371 RM |
4975 | 32, /* plt_lazy_offset */ |
4976 | elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */ | |
4977 | elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */ | |
4978 | elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */ | |
f604c2a2 | 4979 | sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */ |
a27e4371 RM |
4980 | }; |
4981 | ||
4982 | static const struct elf_i386_backend_data elf_i386_nacl_arch_bed = | |
4983 | { | |
f604c2a2 L |
4984 | 0x90, /* plt0_pad_byte: nop insn */ |
4985 | is_nacl /* os */ | |
a27e4371 RM |
4986 | }; |
4987 | ||
64b384e1 RM |
4988 | static bfd_boolean |
4989 | elf32_i386_nacl_elf_object_p (bfd *abfd) | |
4990 | { | |
4991 | /* Set the right machine number for a NaCl i386 ELF32 file. */ | |
4992 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl); | |
4993 | return TRUE; | |
4994 | } | |
4995 | ||
a27e4371 RM |
4996 | #undef elf_backend_arch_data |
4997 | #define elf_backend_arch_data &elf_i386_nacl_arch_bed | |
4998 | ||
64b384e1 RM |
4999 | #undef elf_backend_object_p |
5000 | #define elf_backend_object_p elf32_i386_nacl_elf_object_p | |
5a68afcf RM |
5001 | #undef elf_backend_modify_segment_map |
5002 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
5003 | #undef elf_backend_modify_program_headers | |
5004 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
5005 | #undef elf_backend_final_write_processing |
5006 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 5007 | |
a27e4371 RM |
5008 | #include "elf32-target.h" |
5009 | ||
5a68afcf | 5010 | /* Restore defaults. */ |
64b384e1 | 5011 | #undef elf_backend_object_p |
5a68afcf RM |
5012 | #undef elf_backend_modify_segment_map |
5013 | #undef elf_backend_modify_program_headers | |
887badb3 | 5014 | #undef elf_backend_final_write_processing |
5a68afcf | 5015 | |
eac338cf PB |
5016 | /* VxWorks support. */ |
5017 | ||
5018 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5019 | #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec |
eac338cf PB |
5020 | #undef TARGET_LITTLE_NAME |
5021 | #define TARGET_LITTLE_NAME "elf32-i386-vxworks" | |
d1036acb | 5022 | #undef ELF_OSABI |
1587442d L |
5023 | #undef ELF_MAXPAGESIZE |
5024 | #define ELF_MAXPAGESIZE 0x1000 | |
a27e4371 RM |
5025 | #undef elf_backend_plt_alignment |
5026 | #define elf_backend_plt_alignment 4 | |
eac338cf | 5027 | |
23209a78 RM |
5028 | static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed = |
5029 | { | |
5030 | 0x90, /* plt0_pad_byte */ | |
f604c2a2 | 5031 | is_vxworks /* os */ |
23209a78 | 5032 | }; |
eac338cf | 5033 | |
23209a78 RM |
5034 | #undef elf_backend_arch_data |
5035 | #define elf_backend_arch_data &elf_i386_vxworks_arch_bed | |
eac338cf | 5036 | |
13285a1b | 5037 | #undef elf_backend_relocs_compatible |
eac338cf PB |
5038 | #undef elf_backend_add_symbol_hook |
5039 | #define elf_backend_add_symbol_hook \ | |
5040 | elf_vxworks_add_symbol_hook | |
5041 | #undef elf_backend_link_output_symbol_hook | |
5042 | #define elf_backend_link_output_symbol_hook \ | |
9c72ff84 | 5043 | elf_vxworks_link_output_symbol_hook |
eac338cf PB |
5044 | #undef elf_backend_emit_relocs |
5045 | #define elf_backend_emit_relocs elf_vxworks_emit_relocs | |
5046 | #undef elf_backend_final_write_processing | |
5047 | #define elf_backend_final_write_processing \ | |
5048 | elf_vxworks_final_write_processing | |
7dc98aea | 5049 | #undef elf_backend_static_tls_alignment |
eac338cf PB |
5050 | |
5051 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so | |
5052 | define it. */ | |
5053 | #undef elf_backend_want_plt_sym | |
5054 | #define elf_backend_want_plt_sym 1 | |
5055 | ||
5056 | #undef elf32_bed | |
5057 | #define elf32_bed elf32_i386_vxworks_bed | |
5058 | ||
5059 | #include "elf32-target.h" |