Commit | Line | Data |
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252b5132 | 1 | /* Intel 80386/80486-specific support for 32-bit ELF |
6f2750fe | 2 | Copyright (C) 1993-2016 Free Software Foundation, Inc. |
252b5132 | 3 | |
571fe01f | 4 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 5 | |
571fe01f NC |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 8 | the Free Software Foundation; either version 3 of the License, or |
571fe01f | 9 | (at your option) any later version. |
252b5132 | 10 | |
571fe01f NC |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
252b5132 | 15 | |
571fe01f NC |
16 | You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
19 | MA 02110-1301, USA. */ | |
252b5132 | 20 | |
252b5132 | 21 | #include "sysdep.h" |
3db64b00 | 22 | #include "bfd.h" |
252b5132 RH |
23 | #include "bfdlink.h" |
24 | #include "libbfd.h" | |
25 | #include "elf-bfd.h" | |
5a68afcf | 26 | #include "elf-nacl.h" |
eac338cf | 27 | #include "elf-vxworks.h" |
142411ca | 28 | #include "bfd_stdint.h" |
c25bc9fc L |
29 | #include "objalloc.h" |
30 | #include "hashtab.h" | |
e41b3a13 | 31 | #include "dwarf2.h" |
02a86693 | 32 | #include "opcode/i386.h" |
252b5132 | 33 | |
55fd94b0 AM |
34 | /* 386 uses REL relocations instead of RELA. */ |
35 | #define USE_REL 1 | |
252b5132 RH |
36 | |
37 | #include "elf/i386.h" | |
38 | ||
39 | static reloc_howto_type elf_howto_table[]= | |
40 | { | |
6346d5ca | 41 | HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont, |
1b452ec6 | 42 | bfd_elf_generic_reloc, "R_386_NONE", |
b34976b6 AM |
43 | TRUE, 0x00000000, 0x00000000, FALSE), |
44 | HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 45 | bfd_elf_generic_reloc, "R_386_32", |
b34976b6 AM |
46 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
47 | HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 48 | bfd_elf_generic_reloc, "R_386_PC32", |
b34976b6 AM |
49 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
50 | HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 51 | bfd_elf_generic_reloc, "R_386_GOT32", |
b34976b6 AM |
52 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
53 | HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 54 | bfd_elf_generic_reloc, "R_386_PLT32", |
b34976b6 AM |
55 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
56 | HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 57 | bfd_elf_generic_reloc, "R_386_COPY", |
b34976b6 AM |
58 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
59 | HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 60 | bfd_elf_generic_reloc, "R_386_GLOB_DAT", |
b34976b6 AM |
61 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
62 | HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 63 | bfd_elf_generic_reloc, "R_386_JUMP_SLOT", |
b34976b6 AM |
64 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
65 | HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 66 | bfd_elf_generic_reloc, "R_386_RELATIVE", |
b34976b6 AM |
67 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
68 | HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 69 | bfd_elf_generic_reloc, "R_386_GOTOFF", |
b34976b6 AM |
70 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
71 | HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 72 | bfd_elf_generic_reloc, "R_386_GOTPC", |
b34976b6 | 73 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
1b452ec6 | 74 | |
dc47f327 AM |
75 | /* We have a gap in the reloc numbers here. |
76 | R_386_standard counts the number up to this point, and | |
77 | R_386_ext_offset is the value to subtract from a reloc type of | |
78 | R_386_16 thru R_386_PC8 to form an index into this table. */ | |
55fd94b0 AM |
79 | #define R_386_standard (R_386_GOTPC + 1) |
80 | #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard) | |
1b452ec6 | 81 | |
37e55690 | 82 | /* These relocs are a GNU extension. */ |
b34976b6 | 83 | HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
37e55690 | 84 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF", |
b34976b6 AM |
85 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
86 | HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 87 | bfd_elf_generic_reloc, "R_386_TLS_IE", |
b34976b6 AM |
88 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
89 | HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 90 | bfd_elf_generic_reloc, "R_386_TLS_GOTIE", |
b34976b6 AM |
91 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
92 | HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 93 | bfd_elf_generic_reloc, "R_386_TLS_LE", |
b34976b6 AM |
94 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
95 | HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 96 | bfd_elf_generic_reloc, "R_386_TLS_GD", |
b34976b6 AM |
97 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
98 | HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 99 | bfd_elf_generic_reloc, "R_386_TLS_LDM", |
b34976b6 AM |
100 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
101 | HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 102 | bfd_elf_generic_reloc, "R_386_16", |
b34976b6 | 103 | TRUE, 0xffff, 0xffff, FALSE), |
b0360d8c | 104 | HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
1b452ec6 | 105 | bfd_elf_generic_reloc, "R_386_PC16", |
b34976b6 AM |
106 | TRUE, 0xffff, 0xffff, TRUE), |
107 | HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 108 | bfd_elf_generic_reloc, "R_386_8", |
b34976b6 AM |
109 | TRUE, 0xff, 0xff, FALSE), |
110 | HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
1b452ec6 | 111 | bfd_elf_generic_reloc, "R_386_PC8", |
b34976b6 | 112 | TRUE, 0xff, 0xff, TRUE), |
dc47f327 | 113 | |
55fd94b0 AM |
114 | #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset) |
115 | #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext) | |
13ae64f3 | 116 | /* These are common with Solaris TLS implementation. */ |
b34976b6 | 117 | HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
13ae64f3 | 118 | bfd_elf_generic_reloc, "R_386_TLS_LDO_32", |
b34976b6 AM |
119 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
120 | HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 121 | bfd_elf_generic_reloc, "R_386_TLS_IE_32", |
b34976b6 AM |
122 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
123 | HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 124 | bfd_elf_generic_reloc, "R_386_TLS_LE_32", |
b34976b6 AM |
125 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
126 | HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 127 | bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32", |
b34976b6 AM |
128 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
129 | HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 130 | bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32", |
b34976b6 AM |
131 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
132 | HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 133 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF32", |
b34976b6 | 134 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
1788fc08 L |
135 | HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, |
136 | bfd_elf_generic_reloc, "R_386_SIZE32", | |
137 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
67a4f2b7 AO |
138 | HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
139 | bfd_elf_generic_reloc, "R_386_TLS_GOTDESC", | |
140 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
141 | HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
142 | bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL", | |
143 | FALSE, 0, 0, FALSE), | |
144 | HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
145 | bfd_elf_generic_reloc, "R_386_TLS_DESC", | |
146 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
cbe950e9 L |
147 | HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
148 | bfd_elf_generic_reloc, "R_386_IRELATIVE", | |
149 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
02a86693 L |
150 | HOWTO(R_386_GOT32X, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
151 | bfd_elf_generic_reloc, "R_386_GOT32X", | |
152 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
13ae64f3 JJ |
153 | |
154 | /* Another gap. */ | |
02a86693 | 155 | #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset) |
c74be520 | 156 | #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2) |
252b5132 RH |
157 | |
158 | /* GNU extension to record C++ vtable hierarchy. */ | |
252b5132 RH |
159 | HOWTO (R_386_GNU_VTINHERIT, /* type */ |
160 | 0, /* rightshift */ | |
161 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
162 | 0, /* bitsize */ | |
b34976b6 | 163 | FALSE, /* pc_relative */ |
252b5132 RH |
164 | 0, /* bitpos */ |
165 | complain_overflow_dont, /* complain_on_overflow */ | |
166 | NULL, /* special_function */ | |
167 | "R_386_GNU_VTINHERIT", /* name */ | |
b34976b6 | 168 | FALSE, /* partial_inplace */ |
252b5132 RH |
169 | 0, /* src_mask */ |
170 | 0, /* dst_mask */ | |
b34976b6 | 171 | FALSE), /* pcrel_offset */ |
252b5132 RH |
172 | |
173 | /* GNU extension to record C++ vtable member usage. */ | |
252b5132 RH |
174 | HOWTO (R_386_GNU_VTENTRY, /* type */ |
175 | 0, /* rightshift */ | |
176 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
177 | 0, /* bitsize */ | |
b34976b6 | 178 | FALSE, /* pc_relative */ |
252b5132 RH |
179 | 0, /* bitpos */ |
180 | complain_overflow_dont, /* complain_on_overflow */ | |
181 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
182 | "R_386_GNU_VTENTRY", /* name */ | |
b34976b6 | 183 | FALSE, /* partial_inplace */ |
252b5132 RH |
184 | 0, /* src_mask */ |
185 | 0, /* dst_mask */ | |
b34976b6 | 186 | FALSE) /* pcrel_offset */ |
dc47f327 | 187 | |
55fd94b0 | 188 | #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset) |
dc47f327 AM |
189 | |
190 | }; | |
191 | ||
252b5132 | 192 | #ifdef DEBUG_GEN_RELOC |
55fd94b0 AM |
193 | #define TRACE(str) \ |
194 | fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str) | |
252b5132 RH |
195 | #else |
196 | #define TRACE(str) | |
197 | #endif | |
198 | ||
199 | static reloc_howto_type * | |
55fd94b0 AM |
200 | elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
201 | bfd_reloc_code_real_type code) | |
252b5132 RH |
202 | { |
203 | switch (code) | |
204 | { | |
205 | case BFD_RELOC_NONE: | |
206 | TRACE ("BFD_RELOC_NONE"); | |
55fd94b0 | 207 | return &elf_howto_table[R_386_NONE]; |
252b5132 RH |
208 | |
209 | case BFD_RELOC_32: | |
210 | TRACE ("BFD_RELOC_32"); | |
55fd94b0 | 211 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
212 | |
213 | case BFD_RELOC_CTOR: | |
214 | TRACE ("BFD_RELOC_CTOR"); | |
55fd94b0 | 215 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
216 | |
217 | case BFD_RELOC_32_PCREL: | |
218 | TRACE ("BFD_RELOC_PC32"); | |
55fd94b0 | 219 | return &elf_howto_table[R_386_PC32]; |
252b5132 RH |
220 | |
221 | case BFD_RELOC_386_GOT32: | |
222 | TRACE ("BFD_RELOC_386_GOT32"); | |
55fd94b0 | 223 | return &elf_howto_table[R_386_GOT32]; |
252b5132 RH |
224 | |
225 | case BFD_RELOC_386_PLT32: | |
226 | TRACE ("BFD_RELOC_386_PLT32"); | |
55fd94b0 | 227 | return &elf_howto_table[R_386_PLT32]; |
252b5132 RH |
228 | |
229 | case BFD_RELOC_386_COPY: | |
230 | TRACE ("BFD_RELOC_386_COPY"); | |
55fd94b0 | 231 | return &elf_howto_table[R_386_COPY]; |
252b5132 RH |
232 | |
233 | case BFD_RELOC_386_GLOB_DAT: | |
234 | TRACE ("BFD_RELOC_386_GLOB_DAT"); | |
55fd94b0 | 235 | return &elf_howto_table[R_386_GLOB_DAT]; |
252b5132 RH |
236 | |
237 | case BFD_RELOC_386_JUMP_SLOT: | |
238 | TRACE ("BFD_RELOC_386_JUMP_SLOT"); | |
55fd94b0 | 239 | return &elf_howto_table[R_386_JUMP_SLOT]; |
252b5132 RH |
240 | |
241 | case BFD_RELOC_386_RELATIVE: | |
242 | TRACE ("BFD_RELOC_386_RELATIVE"); | |
55fd94b0 | 243 | return &elf_howto_table[R_386_RELATIVE]; |
252b5132 RH |
244 | |
245 | case BFD_RELOC_386_GOTOFF: | |
246 | TRACE ("BFD_RELOC_386_GOTOFF"); | |
55fd94b0 | 247 | return &elf_howto_table[R_386_GOTOFF]; |
252b5132 RH |
248 | |
249 | case BFD_RELOC_386_GOTPC: | |
250 | TRACE ("BFD_RELOC_386_GOTPC"); | |
55fd94b0 | 251 | return &elf_howto_table[R_386_GOTPC]; |
252b5132 | 252 | |
37e55690 JJ |
253 | /* These relocs are a GNU extension. */ |
254 | case BFD_RELOC_386_TLS_TPOFF: | |
255 | TRACE ("BFD_RELOC_386_TLS_TPOFF"); | |
55fd94b0 | 256 | return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset]; |
37e55690 JJ |
257 | |
258 | case BFD_RELOC_386_TLS_IE: | |
259 | TRACE ("BFD_RELOC_386_TLS_IE"); | |
55fd94b0 | 260 | return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset]; |
37e55690 JJ |
261 | |
262 | case BFD_RELOC_386_TLS_GOTIE: | |
263 | TRACE ("BFD_RELOC_386_TLS_GOTIE"); | |
55fd94b0 | 264 | return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset]; |
37e55690 | 265 | |
13ae64f3 JJ |
266 | case BFD_RELOC_386_TLS_LE: |
267 | TRACE ("BFD_RELOC_386_TLS_LE"); | |
55fd94b0 | 268 | return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset]; |
13ae64f3 JJ |
269 | |
270 | case BFD_RELOC_386_TLS_GD: | |
271 | TRACE ("BFD_RELOC_386_TLS_GD"); | |
55fd94b0 | 272 | return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset]; |
13ae64f3 JJ |
273 | |
274 | case BFD_RELOC_386_TLS_LDM: | |
275 | TRACE ("BFD_RELOC_386_TLS_LDM"); | |
55fd94b0 | 276 | return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset]; |
13ae64f3 | 277 | |
252b5132 RH |
278 | case BFD_RELOC_16: |
279 | TRACE ("BFD_RELOC_16"); | |
55fd94b0 | 280 | return &elf_howto_table[R_386_16 - R_386_ext_offset]; |
252b5132 RH |
281 | |
282 | case BFD_RELOC_16_PCREL: | |
283 | TRACE ("BFD_RELOC_16_PCREL"); | |
55fd94b0 | 284 | return &elf_howto_table[R_386_PC16 - R_386_ext_offset]; |
252b5132 RH |
285 | |
286 | case BFD_RELOC_8: | |
287 | TRACE ("BFD_RELOC_8"); | |
55fd94b0 | 288 | return &elf_howto_table[R_386_8 - R_386_ext_offset]; |
252b5132 RH |
289 | |
290 | case BFD_RELOC_8_PCREL: | |
291 | TRACE ("BFD_RELOC_8_PCREL"); | |
55fd94b0 | 292 | return &elf_howto_table[R_386_PC8 - R_386_ext_offset]; |
252b5132 | 293 | |
13ae64f3 JJ |
294 | /* Common with Sun TLS implementation. */ |
295 | case BFD_RELOC_386_TLS_LDO_32: | |
296 | TRACE ("BFD_RELOC_386_TLS_LDO_32"); | |
55fd94b0 | 297 | return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset]; |
13ae64f3 JJ |
298 | |
299 | case BFD_RELOC_386_TLS_IE_32: | |
300 | TRACE ("BFD_RELOC_386_TLS_IE_32"); | |
55fd94b0 | 301 | return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
302 | |
303 | case BFD_RELOC_386_TLS_LE_32: | |
304 | TRACE ("BFD_RELOC_386_TLS_LE_32"); | |
55fd94b0 | 305 | return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
306 | |
307 | case BFD_RELOC_386_TLS_DTPMOD32: | |
308 | TRACE ("BFD_RELOC_386_TLS_DTPMOD32"); | |
55fd94b0 | 309 | return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset]; |
13ae64f3 JJ |
310 | |
311 | case BFD_RELOC_386_TLS_DTPOFF32: | |
312 | TRACE ("BFD_RELOC_386_TLS_DTPOFF32"); | |
55fd94b0 | 313 | return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset]; |
13ae64f3 JJ |
314 | |
315 | case BFD_RELOC_386_TLS_TPOFF32: | |
316 | TRACE ("BFD_RELOC_386_TLS_TPOFF32"); | |
55fd94b0 | 317 | return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset]; |
13ae64f3 | 318 | |
1788fc08 L |
319 | case BFD_RELOC_SIZE32: |
320 | TRACE ("BFD_RELOC_SIZE32"); | |
321 | return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset]; | |
322 | ||
67a4f2b7 AO |
323 | case BFD_RELOC_386_TLS_GOTDESC: |
324 | TRACE ("BFD_RELOC_386_TLS_GOTDESC"); | |
325 | return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset]; | |
326 | ||
327 | case BFD_RELOC_386_TLS_DESC_CALL: | |
328 | TRACE ("BFD_RELOC_386_TLS_DESC_CALL"); | |
329 | return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset]; | |
330 | ||
331 | case BFD_RELOC_386_TLS_DESC: | |
332 | TRACE ("BFD_RELOC_386_TLS_DESC"); | |
333 | return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset]; | |
334 | ||
cbe950e9 L |
335 | case BFD_RELOC_386_IRELATIVE: |
336 | TRACE ("BFD_RELOC_386_IRELATIVE"); | |
2a750708 | 337 | return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset]; |
cbe950e9 | 338 | |
02a86693 L |
339 | case BFD_RELOC_386_GOT32X: |
340 | TRACE ("BFD_RELOC_386_GOT32X"); | |
341 | return &elf_howto_table[R_386_GOT32X - R_386_tls_offset]; | |
342 | ||
252b5132 RH |
343 | case BFD_RELOC_VTABLE_INHERIT: |
344 | TRACE ("BFD_RELOC_VTABLE_INHERIT"); | |
55fd94b0 | 345 | return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset]; |
252b5132 RH |
346 | |
347 | case BFD_RELOC_VTABLE_ENTRY: | |
348 | TRACE ("BFD_RELOC_VTABLE_ENTRY"); | |
55fd94b0 | 349 | return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset]; |
252b5132 RH |
350 | |
351 | default: | |
352 | break; | |
353 | } | |
354 | ||
355 | TRACE ("Unknown"); | |
356 | return 0; | |
357 | } | |
358 | ||
157090f7 AM |
359 | static reloc_howto_type * |
360 | elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
361 | const char *r_name) | |
362 | { | |
363 | unsigned int i; | |
364 | ||
365 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) | |
366 | if (elf_howto_table[i].name != NULL | |
367 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) | |
368 | return &elf_howto_table[i]; | |
369 | ||
370 | return NULL; | |
371 | } | |
372 | ||
142411ca L |
373 | static reloc_howto_type * |
374 | elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type) | |
252b5132 | 375 | { |
dc47f327 AM |
376 | unsigned int indx; |
377 | ||
378 | if ((indx = r_type) >= R_386_standard | |
379 | && ((indx = r_type - R_386_ext_offset) - R_386_standard | |
380 | >= R_386_ext - R_386_standard) | |
13ae64f3 | 381 | && ((indx = r_type - R_386_tls_offset) - R_386_ext |
c74be520 L |
382 | >= R_386_ext2 - R_386_ext) |
383 | && ((indx = r_type - R_386_vt_offset) - R_386_ext2 | |
384 | >= R_386_vt - R_386_ext2)) | |
252b5132 | 385 | { |
d003868e AM |
386 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), |
387 | abfd, (int) r_type); | |
55fd94b0 | 388 | indx = R_386_NONE; |
252b5132 | 389 | } |
06614111 NC |
390 | /* PR 17512: file: 0f67f69d. */ |
391 | if (elf_howto_table [indx].type != r_type) | |
392 | return NULL; | |
142411ca L |
393 | return &elf_howto_table[indx]; |
394 | } | |
395 | ||
396 | static void | |
397 | elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, | |
398 | arelent *cache_ptr, | |
399 | Elf_Internal_Rela *dst) | |
400 | { | |
401 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); | |
402 | cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type); | |
252b5132 RH |
403 | } |
404 | ||
405 | /* Return whether a symbol name implies a local label. The UnixWare | |
406 | 2.1 cc generates temporary symbols that start with .X, so we | |
407 | recognize them here. FIXME: do other SVR4 compilers also use .X?. | |
408 | If so, we should move the .X recognition into | |
409 | _bfd_elf_is_local_label_name. */ | |
410 | ||
b34976b6 | 411 | static bfd_boolean |
55fd94b0 | 412 | elf_i386_is_local_label_name (bfd *abfd, const char *name) |
252b5132 RH |
413 | { |
414 | if (name[0] == '.' && name[1] == 'X') | |
b34976b6 | 415 | return TRUE; |
252b5132 RH |
416 | |
417 | return _bfd_elf_is_local_label_name (abfd, name); | |
418 | } | |
419 | \f | |
38701953 | 420 | /* Support for core dump NOTE sections. */ |
61adc1a4 | 421 | |
b34976b6 | 422 | static bfd_boolean |
55fd94b0 | 423 | elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
38701953 AM |
424 | { |
425 | int offset; | |
eea6121a | 426 | size_t size; |
38701953 | 427 | |
61adc1a4 | 428 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 429 | { |
61adc1a4 NC |
430 | int pr_version = bfd_get_32 (abfd, note->descdata); |
431 | ||
432 | if (pr_version != 1) | |
433 | return FALSE; | |
434 | ||
435 | /* pr_cursig */ | |
228e534f | 436 | elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20); |
61adc1a4 NC |
437 | |
438 | /* pr_pid */ | |
228e534f | 439 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
61adc1a4 NC |
440 | |
441 | /* pr_reg */ | |
442 | offset = 28; | |
eea6121a | 443 | size = bfd_get_32 (abfd, note->descdata + 8); |
61adc1a4 NC |
444 | } |
445 | else | |
446 | { | |
447 | switch (note->descsz) | |
448 | { | |
449 | default: | |
450 | return FALSE; | |
38701953 | 451 | |
61adc1a4 NC |
452 | case 144: /* Linux/i386 */ |
453 | /* pr_cursig */ | |
228e534f | 454 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
38701953 | 455 | |
61adc1a4 | 456 | /* pr_pid */ |
228e534f | 457 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
38701953 | 458 | |
61adc1a4 NC |
459 | /* pr_reg */ |
460 | offset = 72; | |
eea6121a | 461 | size = 68; |
38701953 | 462 | |
61adc1a4 NC |
463 | break; |
464 | } | |
38701953 AM |
465 | } |
466 | ||
467 | /* Make a ".reg/999" section. */ | |
468 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 469 | size, note->descpos + offset); |
38701953 AM |
470 | } |
471 | ||
b34976b6 | 472 | static bfd_boolean |
55fd94b0 | 473 | elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
38701953 | 474 | { |
61adc1a4 | 475 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 476 | { |
61adc1a4 NC |
477 | int pr_version = bfd_get_32 (abfd, note->descdata); |
478 | ||
479 | if (pr_version != 1) | |
b34976b6 | 480 | return FALSE; |
38701953 | 481 | |
228e534f | 482 | elf_tdata (abfd)->core->program |
61adc1a4 | 483 | = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17); |
228e534f | 484 | elf_tdata (abfd)->core->command |
61adc1a4 NC |
485 | = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81); |
486 | } | |
487 | else | |
488 | { | |
489 | switch (note->descsz) | |
490 | { | |
491 | default: | |
492 | return FALSE; | |
493 | ||
494 | case 124: /* Linux/i386 elf_prpsinfo. */ | |
228e534f | 495 | elf_tdata (abfd)->core->pid |
261b8d08 | 496 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 497 | elf_tdata (abfd)->core->program |
61adc1a4 | 498 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 499 | elf_tdata (abfd)->core->command |
61adc1a4 NC |
500 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
501 | } | |
38701953 AM |
502 | } |
503 | ||
504 | /* Note that for some reason, a spurious space is tacked | |
505 | onto the end of the args in some (at least one anyway) | |
506 | implementations, so strip it off if it exists. */ | |
38701953 | 507 | { |
228e534f | 508 | char *command = elf_tdata (abfd)->core->command; |
38701953 AM |
509 | int n = strlen (command); |
510 | ||
511 | if (0 < n && command[n - 1] == ' ') | |
512 | command[n - 1] = '\0'; | |
513 | } | |
514 | ||
b34976b6 | 515 | return TRUE; |
38701953 AM |
516 | } |
517 | \f | |
518 | /* Functions for the i386 ELF linker. | |
519 | ||
520 | In order to gain some understanding of code in this file without | |
521 | knowing all the intricate details of the linker, note the | |
522 | following: | |
523 | ||
524 | Functions named elf_i386_* are called by external routines, other | |
525 | functions are only called locally. elf_i386_* functions appear | |
526 | in this file more or less in the order in which they are called | |
527 | from external routines. eg. elf_i386_check_relocs is called | |
528 | early in the link process, elf_i386_finish_dynamic_sections is | |
529 | one of the last functions. */ | |
530 | ||
252b5132 RH |
531 | |
532 | /* The name of the dynamic interpreter. This is put in the .interp | |
533 | section. */ | |
534 | ||
535 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
536 | ||
a23b6845 AM |
537 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
538 | copying dynamic variables from a shared lib into an app's dynbss | |
539 | section, and instead use a dynamic relocation to point into the | |
540 | shared lib. */ | |
541 | #define ELIMINATE_COPY_RELOCS 1 | |
542 | ||
252b5132 RH |
543 | /* The size in bytes of an entry in the procedure linkage table. */ |
544 | ||
545 | #define PLT_ENTRY_SIZE 16 | |
546 | ||
547 | /* The first entry in an absolute procedure linkage table looks like | |
eac338cf PB |
548 | this. See the SVR4 ABI i386 supplement to see how this works. |
549 | Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */ | |
252b5132 | 550 | |
eac338cf | 551 | static const bfd_byte elf_i386_plt0_entry[12] = |
252b5132 RH |
552 | { |
553 | 0xff, 0x35, /* pushl contents of address */ | |
554 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
555 | 0xff, 0x25, /* jmp indirect */ | |
eac338cf | 556 | 0, 0, 0, 0 /* replaced with address of .got + 8. */ |
252b5132 RH |
557 | }; |
558 | ||
559 | /* Subsequent entries in an absolute procedure linkage table look like | |
560 | this. */ | |
561 | ||
562 | static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] = | |
563 | { | |
564 | 0xff, 0x25, /* jmp indirect */ | |
565 | 0, 0, 0, 0, /* replaced with address of this symbol in .got. */ | |
566 | 0x68, /* pushl immediate */ | |
567 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
568 | 0xe9, /* jmp relative */ | |
569 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
570 | }; | |
571 | ||
eac338cf PB |
572 | /* The first entry in a PIC procedure linkage table look like this. |
573 | Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */ | |
252b5132 | 574 | |
eac338cf | 575 | static const bfd_byte elf_i386_pic_plt0_entry[12] = |
252b5132 RH |
576 | { |
577 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
eac338cf | 578 | 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */ |
252b5132 RH |
579 | }; |
580 | ||
581 | /* Subsequent entries in a PIC procedure linkage table look like this. */ | |
582 | ||
583 | static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] = | |
584 | { | |
585 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
586 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
587 | 0x68, /* pushl immediate */ | |
588 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
589 | 0xe9, /* jmp relative */ | |
590 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
591 | }; | |
592 | ||
dd7e64d4 L |
593 | /* Entries in the GOT procedure linkage table look like this. */ |
594 | ||
595 | static const bfd_byte elf_i386_got_plt_entry[8] = | |
596 | { | |
597 | 0xff, 0x25, /* jmp indirect */ | |
598 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
599 | 0x66, 0x90 /* xchg %ax,%ax */ | |
600 | }; | |
601 | ||
602 | /* Entries in the PIC GOT procedure linkage table look like this. */ | |
603 | ||
604 | static const bfd_byte elf_i386_pic_got_plt_entry[8] = | |
605 | { | |
606 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
607 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
608 | 0x66, 0x90 /* xchg %ax,%ax */ | |
609 | }; | |
610 | ||
e41b3a13 JJ |
611 | /* .eh_frame covering the .plt section. */ |
612 | ||
613 | static const bfd_byte elf_i386_eh_frame_plt[] = | |
614 | { | |
615 | #define PLT_CIE_LENGTH 20 | |
616 | #define PLT_FDE_LENGTH 36 | |
617 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
618 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
619 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
620 | 0, 0, 0, 0, /* CIE ID */ | |
621 | 1, /* CIE version */ | |
622 | 'z', 'R', 0, /* Augmentation string */ | |
623 | 1, /* Code alignment factor */ | |
624 | 0x7c, /* Data alignment factor */ | |
625 | 8, /* Return address column */ | |
626 | 1, /* Augmentation size */ | |
627 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
628 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
629 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
630 | DW_CFA_nop, DW_CFA_nop, | |
631 | ||
632 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
633 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
634 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
635 | 0, 0, 0, 0, /* .plt size goes here */ | |
636 | 0, /* Augmentation size */ | |
637 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
638 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
639 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
640 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
641 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
642 | 11, /* Block length */ | |
643 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
644 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
645 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
28ede8be | 646 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, |
e41b3a13 JJ |
647 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop |
648 | }; | |
649 | ||
25e762b9 RM |
650 | struct elf_i386_plt_layout |
651 | { | |
652 | /* The first entry in an absolute procedure linkage table looks like this. */ | |
653 | const bfd_byte *plt0_entry; | |
654 | unsigned int plt0_entry_size; | |
655 | ||
656 | /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */ | |
657 | unsigned int plt0_got1_offset; | |
658 | unsigned int plt0_got2_offset; | |
659 | ||
660 | /* Later entries in an absolute procedure linkage table look like this. */ | |
661 | const bfd_byte *plt_entry; | |
662 | unsigned int plt_entry_size; | |
663 | ||
664 | /* Offsets into plt_entry that are to be replaced with... */ | |
665 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
666 | unsigned int plt_reloc_offset; /* ... offset into relocation table. */ | |
667 | unsigned int plt_plt_offset; /* ... offset to start of .plt. */ | |
668 | ||
669 | /* Offset into plt_entry where the initial value of the GOT entry points. */ | |
670 | unsigned int plt_lazy_offset; | |
671 | ||
672 | /* The first entry in a PIC procedure linkage table looks like this. */ | |
673 | const bfd_byte *pic_plt0_entry; | |
674 | ||
675 | /* Subsequent entries in a PIC procedure linkage table look like this. */ | |
676 | const bfd_byte *pic_plt_entry; | |
677 | ||
678 | /* .eh_frame covering the .plt section. */ | |
679 | const bfd_byte *eh_frame_plt; | |
680 | unsigned int eh_frame_plt_size; | |
681 | }; | |
682 | ||
683 | #define GET_PLT_ENTRY_SIZE(abfd) \ | |
684 | get_elf_i386_backend_data (abfd)->plt->plt_entry_size | |
685 | ||
686 | /* These are the standard parameters. */ | |
687 | static const struct elf_i386_plt_layout elf_i386_plt = | |
688 | { | |
689 | elf_i386_plt0_entry, /* plt0_entry */ | |
690 | sizeof (elf_i386_plt0_entry), /* plt0_entry_size */ | |
691 | 2, /* plt0_got1_offset */ | |
692 | 8, /* plt0_got2_offset */ | |
693 | elf_i386_plt_entry, /* plt_entry */ | |
694 | PLT_ENTRY_SIZE, /* plt_entry_size */ | |
695 | 2, /* plt_got_offset */ | |
696 | 7, /* plt_reloc_offset */ | |
697 | 12, /* plt_plt_offset */ | |
698 | 6, /* plt_lazy_offset */ | |
699 | elf_i386_pic_plt0_entry, /* pic_plt0_entry */ | |
700 | elf_i386_pic_plt_entry, /* pic_plt_entry */ | |
701 | elf_i386_eh_frame_plt, /* eh_frame_plt */ | |
702 | sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */ | |
703 | }; | |
704 | \f | |
705 | ||
eac338cf PB |
706 | /* On VxWorks, the .rel.plt.unloaded section has absolute relocations |
707 | for the PLTResolve stub and then for each PLT entry. */ | |
708 | #define PLTRESOLVE_RELOCS_SHLIB 0 | |
709 | #define PLTRESOLVE_RELOCS 2 | |
710 | #define PLT_NON_JUMP_SLOT_RELOCS 2 | |
711 | ||
23209a78 RM |
712 | /* Architecture-specific backend data for i386. */ |
713 | ||
714 | struct elf_i386_backend_data | |
715 | { | |
25e762b9 RM |
716 | /* Parameters describing PLT generation. */ |
717 | const struct elf_i386_plt_layout *plt; | |
718 | ||
23209a78 RM |
719 | /* Value used to fill the unused bytes of the first PLT entry. */ |
720 | bfd_byte plt0_pad_byte; | |
721 | ||
722 | /* True if the target system is VxWorks. */ | |
723 | int is_vxworks; | |
724 | }; | |
725 | ||
726 | #define get_elf_i386_backend_data(abfd) \ | |
727 | ((const struct elf_i386_backend_data *) \ | |
728 | get_elf_backend_data (abfd)->arch_data) | |
729 | ||
730 | /* These are the standard parameters. */ | |
731 | static const struct elf_i386_backend_data elf_i386_arch_bed = | |
732 | { | |
25e762b9 | 733 | &elf_i386_plt, /* plt */ |
23209a78 RM |
734 | 0, /* plt0_pad_byte */ |
735 | 0, /* is_vxworks */ | |
736 | }; | |
737 | ||
738 | #define elf_backend_arch_data &elf_i386_arch_bed | |
739 | ||
aec6b87e L |
740 | /* Is a undefined weak symbol which is resolved to 0. Reference to an |
741 | undefined weak symbol is resolved to 0 when building executable if | |
742 | it isn't dynamic and | |
743 | 1. Has non-GOT/non-PLT relocations in text section. Or | |
744 | 2. Has no GOT/PLT relocation. | |
745 | */ | |
e62b9723 | 746 | #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \ |
aec6b87e L |
747 | ((EH)->elf.root.type == bfd_link_hash_undefweak \ |
748 | && bfd_link_executable (INFO) \ | |
749 | && (elf_i386_hash_table (INFO)->interp == NULL \ | |
e62b9723 | 750 | || !(GOT_RELOC) \ |
aec6b87e L |
751 | || (EH)->has_non_got_reloc \ |
752 | || !(INFO)->dynamic_undefined_weak)) | |
753 | ||
252b5132 RH |
754 | /* i386 ELF linker hash entry. */ |
755 | ||
756 | struct elf_i386_link_hash_entry | |
757 | { | |
ebe50bae | 758 | struct elf_link_hash_entry elf; |
252b5132 | 759 | |
0c715baa | 760 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 761 | struct elf_dyn_relocs *dyn_relocs; |
13ae64f3 | 762 | |
37e55690 JJ |
763 | #define GOT_UNKNOWN 0 |
764 | #define GOT_NORMAL 1 | |
765 | #define GOT_TLS_GD 2 | |
766 | #define GOT_TLS_IE 4 | |
767 | #define GOT_TLS_IE_POS 5 | |
768 | #define GOT_TLS_IE_NEG 6 | |
769 | #define GOT_TLS_IE_BOTH 7 | |
67a4f2b7 AO |
770 | #define GOT_TLS_GDESC 8 |
771 | #define GOT_TLS_GD_BOTH_P(type) \ | |
772 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
773 | #define GOT_TLS_GD_P(type) \ | |
774 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
775 | #define GOT_TLS_GDESC_P(type) \ | |
776 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
777 | #define GOT_TLS_GD_ANY_P(type) \ | |
778 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
37e55690 | 779 | unsigned char tls_type; |
67a4f2b7 | 780 | |
d5597ebc L |
781 | /* Symbol is referenced by R_386_GOTOFF relocation. */ |
782 | unsigned int gotoff_ref : 1; | |
783 | ||
aec6b87e L |
784 | /* Symbol has GOT or PLT relocations. */ |
785 | unsigned int has_got_reloc : 1; | |
786 | ||
787 | /* Symbol has non-GOT/non-PLT relocations in text sections. */ | |
788 | unsigned int has_non_got_reloc : 1; | |
789 | ||
6eaa7fb5 L |
790 | /* 0: symbol isn't ___tls_get_addr. |
791 | 1: symbol is ___tls_get_addr. | |
792 | 2: symbol is unknown. */ | |
793 | unsigned int tls_get_addr : 2; | |
794 | ||
04ebc307 L |
795 | /* Reference count of C/C++ function pointer relocations in read-write |
796 | section which can be resolved at run-time. */ | |
797 | bfd_signed_vma func_pointer_refcount; | |
798 | ||
dd7e64d4 L |
799 | /* Information about the GOT PLT entry. Filled when there are both |
800 | GOT and PLT relocations against the same function. */ | |
801 | union gotplt_union plt_got; | |
802 | ||
67a4f2b7 AO |
803 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, |
804 | starting at the end of the jump table. */ | |
805 | bfd_vma tlsdesc_got; | |
13ae64f3 JJ |
806 | }; |
807 | ||
808 | #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent)) | |
809 | ||
810 | struct elf_i386_obj_tdata | |
811 | { | |
812 | struct elf_obj_tdata root; | |
813 | ||
814 | /* tls_type for each local got entry. */ | |
815 | char *local_got_tls_type; | |
67a4f2b7 AO |
816 | |
817 | /* GOTPLT entries for TLS descriptors. */ | |
818 | bfd_vma *local_tlsdesc_gotent; | |
252b5132 RH |
819 | }; |
820 | ||
13ae64f3 JJ |
821 | #define elf_i386_tdata(abfd) \ |
822 | ((struct elf_i386_obj_tdata *) (abfd)->tdata.any) | |
823 | ||
824 | #define elf_i386_local_got_tls_type(abfd) \ | |
825 | (elf_i386_tdata (abfd)->local_got_tls_type) | |
826 | ||
67a4f2b7 AO |
827 | #define elf_i386_local_tlsdesc_gotent(abfd) \ |
828 | (elf_i386_tdata (abfd)->local_tlsdesc_gotent) | |
829 | ||
0ffa91dd NC |
830 | #define is_i386_elf(bfd) \ |
831 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
832 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 833 | && elf_object_id (bfd) == I386_ELF_DATA) |
0ffa91dd | 834 | |
b34976b6 | 835 | static bfd_boolean |
55fd94b0 | 836 | elf_i386_mkobject (bfd *abfd) |
13ae64f3 | 837 | { |
0ffa91dd | 838 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata), |
4dfe6ac6 | 839 | I386_ELF_DATA); |
13ae64f3 | 840 | } |
cedb70c5 | 841 | |
252b5132 RH |
842 | /* i386 ELF linker hash table. */ |
843 | ||
844 | struct elf_i386_link_hash_table | |
845 | { | |
ebe50bae | 846 | struct elf_link_hash_table elf; |
252b5132 | 847 | |
6725bdbf | 848 | /* Short-cuts to get to dynamic linker sections. */ |
aec6b87e | 849 | asection *interp; |
6725bdbf AM |
850 | asection *sdynbss; |
851 | asection *srelbss; | |
e41b3a13 | 852 | asection *plt_eh_frame; |
dd7e64d4 | 853 | asection *plt_got; |
9635fe29 | 854 | |
4dfe6ac6 NC |
855 | union |
856 | { | |
13ae64f3 JJ |
857 | bfd_signed_vma refcount; |
858 | bfd_vma offset; | |
859 | } tls_ldm_got; | |
860 | ||
67a4f2b7 AO |
861 | /* The amount of space used by the reserved portion of the sgotplt |
862 | section, plus whatever space is used by the jump slots. */ | |
863 | bfd_vma sgotplt_jump_table_size; | |
864 | ||
87d72d41 AM |
865 | /* Small local sym cache. */ |
866 | struct sym_cache sym_cache; | |
9f03412a AO |
867 | |
868 | /* _TLS_MODULE_BASE_ symbol. */ | |
869 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
870 | |
871 | /* Used by local STT_GNU_IFUNC symbols. */ | |
872 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
873 | void * loc_hash_memory; |
874 | ||
875 | /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */ | |
876 | asection *srelplt2; | |
877 | ||
4dfe6ac6 NC |
878 | /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */ |
879 | bfd_vma next_tls_desc_index; | |
e1f98742 L |
880 | |
881 | /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */ | |
882 | bfd_vma next_jump_slot_index; | |
883 | ||
884 | /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */ | |
885 | bfd_vma next_irelative_index; | |
2df3368d L |
886 | |
887 | /* TRUE if there are dynamic relocs against IFUNC symbols that apply | |
888 | to read-only sections. */ | |
889 | bfd_boolean readonly_dynrelocs_against_ifunc; | |
6725bdbf | 890 | }; |
252b5132 RH |
891 | |
892 | /* Get the i386 ELF linker hash table from a link_info structure. */ | |
893 | ||
894 | #define elf_i386_hash_table(p) \ | |
4dfe6ac6 NC |
895 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
896 | == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL) | |
252b5132 | 897 | |
67a4f2b7 | 898 | #define elf_i386_compute_jump_table_size(htab) \ |
998d811a | 899 | ((htab)->elf.srelplt->reloc_count * 4) |
67a4f2b7 | 900 | |
252b5132 RH |
901 | /* Create an entry in an i386 ELF linker hash table. */ |
902 | ||
903 | static struct bfd_hash_entry * | |
eb4ff4d6 L |
904 | elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry, |
905 | struct bfd_hash_table *table, | |
906 | const char *string) | |
252b5132 | 907 | { |
252b5132 RH |
908 | /* Allocate the structure if it has not already been allocated by a |
909 | subclass. */ | |
ebe50bae AM |
910 | if (entry == NULL) |
911 | { | |
a50b1753 NC |
912 | entry = (struct bfd_hash_entry *) |
913 | bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry)); | |
ebe50bae AM |
914 | if (entry == NULL) |
915 | return entry; | |
916 | } | |
252b5132 RH |
917 | |
918 | /* Call the allocation method of the superclass. */ | |
ebe50bae AM |
919 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
920 | if (entry != NULL) | |
252b5132 | 921 | { |
ebe50bae AM |
922 | struct elf_i386_link_hash_entry *eh; |
923 | ||
924 | eh = (struct elf_i386_link_hash_entry *) entry; | |
925 | eh->dyn_relocs = NULL; | |
13ae64f3 | 926 | eh->tls_type = GOT_UNKNOWN; |
d5597ebc | 927 | eh->gotoff_ref = 0; |
aec6b87e L |
928 | eh->has_got_reloc = 0; |
929 | eh->has_non_got_reloc = 0; | |
6eaa7fb5 | 930 | eh->tls_get_addr = 2; |
04ebc307 | 931 | eh->func_pointer_refcount = 0; |
dd7e64d4 | 932 | eh->plt_got.offset = (bfd_vma) -1; |
67a4f2b7 | 933 | eh->tlsdesc_got = (bfd_vma) -1; |
252b5132 RH |
934 | } |
935 | ||
ebe50bae | 936 | return entry; |
252b5132 RH |
937 | } |
938 | ||
c25bc9fc L |
939 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
940 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
941 | as global symbol. We reuse indx and dynstr_index for local symbol | |
942 | hash since they aren't used by global symbols in this backend. */ | |
943 | ||
944 | static hashval_t | |
945 | elf_i386_local_htab_hash (const void *ptr) | |
946 | { | |
947 | struct elf_link_hash_entry *h | |
948 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 949 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
950 | } |
951 | ||
952 | /* Compare local hash entries. */ | |
953 | ||
954 | static int | |
955 | elf_i386_local_htab_eq (const void *ptr1, const void *ptr2) | |
956 | { | |
957 | struct elf_link_hash_entry *h1 | |
958 | = (struct elf_link_hash_entry *) ptr1; | |
959 | struct elf_link_hash_entry *h2 | |
960 | = (struct elf_link_hash_entry *) ptr2; | |
961 | ||
962 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
963 | } | |
964 | ||
965 | /* Find and/or create a hash entry for local symbol. */ | |
966 | ||
967 | static struct elf_link_hash_entry * | |
968 | elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab, | |
969 | bfd *abfd, const Elf_Internal_Rela *rel, | |
970 | bfd_boolean create) | |
971 | { | |
972 | struct elf_i386_link_hash_entry e, *ret; | |
973 | asection *sec = abfd->sections; | |
d2149d72 L |
974 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
975 | ELF32_R_SYM (rel->r_info)); | |
c25bc9fc L |
976 | void **slot; |
977 | ||
978 | e.elf.indx = sec->id; | |
979 | e.elf.dynstr_index = ELF32_R_SYM (rel->r_info); | |
980 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, | |
981 | create ? INSERT : NO_INSERT); | |
982 | ||
983 | if (!slot) | |
984 | return NULL; | |
985 | ||
986 | if (*slot) | |
987 | { | |
988 | ret = (struct elf_i386_link_hash_entry *) *slot; | |
989 | return &ret->elf; | |
990 | } | |
991 | ||
992 | ret = (struct elf_i386_link_hash_entry *) | |
993 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, | |
994 | sizeof (struct elf_i386_link_hash_entry)); | |
995 | if (ret) | |
996 | { | |
997 | memset (ret, 0, sizeof (*ret)); | |
998 | ret->elf.indx = sec->id; | |
999 | ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info); | |
1000 | ret->elf.dynindx = -1; | |
04ebc307 | 1001 | ret->func_pointer_refcount = 0; |
dd7e64d4 | 1002 | ret->plt_got.offset = (bfd_vma) -1; |
c25bc9fc L |
1003 | *slot = ret; |
1004 | } | |
1005 | return &ret->elf; | |
1006 | } | |
1007 | ||
68faa637 AM |
1008 | /* Destroy an i386 ELF linker hash table. */ |
1009 | ||
1010 | static void | |
d495ab0d | 1011 | elf_i386_link_hash_table_free (bfd *obfd) |
68faa637 AM |
1012 | { |
1013 | struct elf_i386_link_hash_table *htab | |
d495ab0d | 1014 | = (struct elf_i386_link_hash_table *) obfd->link.hash; |
68faa637 AM |
1015 | |
1016 | if (htab->loc_hash_table) | |
1017 | htab_delete (htab->loc_hash_table); | |
1018 | if (htab->loc_hash_memory) | |
1019 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
d495ab0d | 1020 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
1021 | } |
1022 | ||
252b5132 RH |
1023 | /* Create an i386 ELF linker hash table. */ |
1024 | ||
1025 | static struct bfd_link_hash_table * | |
55fd94b0 | 1026 | elf_i386_link_hash_table_create (bfd *abfd) |
252b5132 RH |
1027 | { |
1028 | struct elf_i386_link_hash_table *ret; | |
dc810e39 | 1029 | bfd_size_type amt = sizeof (struct elf_i386_link_hash_table); |
252b5132 | 1030 | |
7bf52ea2 | 1031 | ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt); |
ebe50bae | 1032 | if (ret == NULL) |
252b5132 RH |
1033 | return NULL; |
1034 | ||
eb4ff4d6 L |
1035 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
1036 | elf_i386_link_hash_newfunc, | |
4dfe6ac6 NC |
1037 | sizeof (struct elf_i386_link_hash_entry), |
1038 | I386_ELF_DATA)) | |
252b5132 | 1039 | { |
e2d34d7d | 1040 | free (ret); |
252b5132 RH |
1041 | return NULL; |
1042 | } | |
1043 | ||
c25bc9fc L |
1044 | ret->loc_hash_table = htab_try_create (1024, |
1045 | elf_i386_local_htab_hash, | |
1046 | elf_i386_local_htab_eq, | |
1047 | NULL); | |
1048 | ret->loc_hash_memory = objalloc_create (); | |
1049 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
1050 | { | |
d495ab0d | 1051 | elf_i386_link_hash_table_free (abfd); |
c25bc9fc L |
1052 | return NULL; |
1053 | } | |
d495ab0d | 1054 | ret->elf.root.hash_table_free = elf_i386_link_hash_table_free; |
c25bc9fc | 1055 | |
ebe50bae | 1056 | return &ret->elf.root; |
252b5132 RH |
1057 | } |
1058 | ||
6725bdbf AM |
1059 | /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and |
1060 | .rel.bss sections in DYNOBJ, and set up shortcuts to them in our | |
1061 | hash table. */ | |
1062 | ||
b34976b6 | 1063 | static bfd_boolean |
55fd94b0 | 1064 | elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
6725bdbf AM |
1065 | { |
1066 | struct elf_i386_link_hash_table *htab; | |
1067 | ||
6725bdbf | 1068 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 1069 | return FALSE; |
6725bdbf | 1070 | |
6de2ae4a | 1071 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1072 | if (htab == NULL) |
1073 | return FALSE; | |
1074 | ||
493f652c L |
1075 | /* Set the contents of the .interp section to the interpreter. */ |
1076 | if (bfd_link_executable (info) && !info->nointerp) | |
1077 | { | |
1078 | asection *s = bfd_get_linker_section (dynobj, ".interp"); | |
1079 | if (s == NULL) | |
1080 | abort (); | |
1081 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
1082 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1083 | htab->interp = s; | |
1084 | } | |
1085 | ||
3d4d4302 | 1086 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
d5597ebc | 1087 | if (!htab->sdynbss) |
6725bdbf AM |
1088 | abort (); |
1089 | ||
0e1862bb | 1090 | if (bfd_link_executable (info)) |
d5597ebc L |
1091 | { |
1092 | /* Always allow copy relocs for building executables. */ | |
1093 | asection *s = bfd_get_linker_section (dynobj, ".rel.bss"); | |
1094 | if (s == NULL) | |
1095 | { | |
1096 | const struct elf_backend_data *bed = get_elf_backend_data (dynobj); | |
1097 | s = bfd_make_section_anyway_with_flags (dynobj, | |
1098 | ".rel.bss", | |
1099 | (bed->dynamic_sec_flags | |
1100 | | SEC_READONLY)); | |
1101 | if (s == NULL | |
1102 | || ! bfd_set_section_alignment (dynobj, s, | |
1103 | bed->s->log_file_align)) | |
1104 | return FALSE; | |
1105 | } | |
1106 | htab->srelbss = s; | |
1107 | } | |
1108 | ||
23209a78 | 1109 | if (get_elf_i386_backend_data (dynobj)->is_vxworks |
6de2ae4a L |
1110 | && !elf_vxworks_create_dynamic_sections (dynobj, info, |
1111 | &htab->srelplt2)) | |
711de32c | 1112 | return FALSE; |
eac338cf | 1113 | |
e41b3a13 | 1114 | if (!info->no_ld_generated_unwind_info |
2fe0fd06 | 1115 | && htab->plt_eh_frame == NULL |
e4de50d4 | 1116 | && htab->elf.splt != NULL) |
e41b3a13 | 1117 | { |
bbf96e4e L |
1118 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
1119 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1120 | | SEC_LINKER_CREATED); | |
e41b3a13 | 1121 | htab->plt_eh_frame |
bbf96e4e | 1122 | = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags); |
e41b3a13 JJ |
1123 | if (htab->plt_eh_frame == NULL |
1124 | || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2)) | |
1125 | return FALSE; | |
e41b3a13 JJ |
1126 | } |
1127 | ||
b34976b6 | 1128 | return TRUE; |
6725bdbf AM |
1129 | } |
1130 | ||
ebe50bae AM |
1131 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
1132 | ||
51b64d56 | 1133 | static void |
fcfa13d2 | 1134 | elf_i386_copy_indirect_symbol (struct bfd_link_info *info, |
55fd94b0 AM |
1135 | struct elf_link_hash_entry *dir, |
1136 | struct elf_link_hash_entry *ind) | |
ebe50bae AM |
1137 | { |
1138 | struct elf_i386_link_hash_entry *edir, *eind; | |
1139 | ||
1140 | edir = (struct elf_i386_link_hash_entry *) dir; | |
1141 | eind = (struct elf_i386_link_hash_entry *) ind; | |
1142 | ||
bbd7ec4a | 1143 | if (eind->dyn_relocs != NULL) |
ebe50bae | 1144 | { |
bbd7ec4a AM |
1145 | if (edir->dyn_relocs != NULL) |
1146 | { | |
e03a8ed8 L |
1147 | struct elf_dyn_relocs **pp; |
1148 | struct elf_dyn_relocs *p; | |
bbd7ec4a | 1149 | |
fcfa13d2 | 1150 | /* Add reloc counts against the indirect sym to the direct sym |
bbd7ec4a AM |
1151 | list. Merge any entries against the same section. */ |
1152 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1153 | { | |
e03a8ed8 | 1154 | struct elf_dyn_relocs *q; |
bbd7ec4a AM |
1155 | |
1156 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1157 | if (q->sec == p->sec) | |
1158 | { | |
1159 | q->pc_count += p->pc_count; | |
1160 | q->count += p->count; | |
1161 | *pp = p->next; | |
1162 | break; | |
1163 | } | |
1164 | if (q == NULL) | |
1165 | pp = &p->next; | |
1166 | } | |
1167 | *pp = edir->dyn_relocs; | |
1168 | } | |
1169 | ||
ebe50bae AM |
1170 | edir->dyn_relocs = eind->dyn_relocs; |
1171 | eind->dyn_relocs = NULL; | |
1172 | } | |
ebe50bae | 1173 | |
cd67d266 JJ |
1174 | if (ind->root.type == bfd_link_hash_indirect |
1175 | && dir->got.refcount <= 0) | |
1176 | { | |
1177 | edir->tls_type = eind->tls_type; | |
1178 | eind->tls_type = GOT_UNKNOWN; | |
1179 | } | |
81848ca0 | 1180 | |
d5597ebc L |
1181 | /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will |
1182 | generate a R_386_COPY reloc. */ | |
1183 | edir->gotoff_ref |= eind->gotoff_ref; | |
1184 | ||
aec6b87e L |
1185 | edir->has_got_reloc |= eind->has_got_reloc; |
1186 | edir->has_non_got_reloc |= eind->has_non_got_reloc; | |
1187 | ||
81848ca0 AM |
1188 | if (ELIMINATE_COPY_RELOCS |
1189 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1190 | && dir->dynamic_adjusted) |
1191 | { | |
1192 | /* If called to transfer flags for a weakdef during processing | |
1193 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1194 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
1195 | dir->ref_dynamic |= ind->ref_dynamic; | |
1196 | dir->ref_regular |= ind->ref_regular; | |
1197 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1198 | dir->needs_plt |= ind->needs_plt; | |
1199 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1200 | } | |
81848ca0 | 1201 | else |
04ebc307 L |
1202 | { |
1203 | if (eind->func_pointer_refcount > 0) | |
1204 | { | |
1205 | edir->func_pointer_refcount += eind->func_pointer_refcount; | |
1206 | eind->func_pointer_refcount = 0; | |
1207 | } | |
1208 | ||
1209 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
1210 | } | |
ebe50bae AM |
1211 | } |
1212 | ||
142411ca L |
1213 | /* Return TRUE if the TLS access code sequence support transition |
1214 | from R_TYPE. */ | |
1215 | ||
1216 | static bfd_boolean | |
bedfd056 | 1217 | elf_i386_check_tls_transition (asection *sec, |
142411ca L |
1218 | bfd_byte *contents, |
1219 | Elf_Internal_Shdr *symtab_hdr, | |
1220 | struct elf_link_hash_entry **sym_hashes, | |
1221 | unsigned int r_type, | |
1222 | const Elf_Internal_Rela *rel, | |
1223 | const Elf_Internal_Rela *relend) | |
13ae64f3 | 1224 | { |
6eaa7fb5 | 1225 | unsigned int val, type, reg; |
142411ca L |
1226 | unsigned long r_symndx; |
1227 | struct elf_link_hash_entry *h; | |
1228 | bfd_vma offset; | |
6eaa7fb5 L |
1229 | bfd_byte *call; |
1230 | bfd_boolean indirect_call, tls_get_addr; | |
142411ca | 1231 | |
142411ca | 1232 | offset = rel->r_offset; |
13ae64f3 | 1233 | switch (r_type) |
142411ca L |
1234 | { |
1235 | case R_386_TLS_GD: | |
1236 | case R_386_TLS_LDM: | |
1237 | if (offset < 2 || (rel + 1) >= relend) | |
1238 | return FALSE; | |
1239 | ||
6eaa7fb5 L |
1240 | indirect_call = FALSE; |
1241 | call = contents + offset + 4; | |
1242 | val = *(call - 5); | |
1243 | type = *(call - 6); | |
142411ca L |
1244 | if (r_type == R_386_TLS_GD) |
1245 | { | |
09e8c3bf | 1246 | /* Check transition from GD access model. Only |
6eaa7fb5 L |
1247 | leal foo@tlsgd(,%ebx,1), %eax |
1248 | call ___tls_get_addr@PLT | |
1249 | or | |
1250 | leal foo@tlsgd(%ebx) %eax | |
1251 | call ___tls_get_addr@PLT | |
1252 | nop | |
1253 | or | |
1254 | leal foo@tlsgd(%reg), %eax | |
1255 | call *___tls_get_addr@GOT(%reg) | |
1256 | which may be converted to | |
1257 | addr32 call ___tls_get_addr | |
142411ca | 1258 | can transit to different access model. */ |
6eaa7fb5 L |
1259 | if ((offset + 10) > sec->size |
1260 | || (type != 0x8d && type != 0x04)) | |
142411ca L |
1261 | return FALSE; |
1262 | ||
142411ca L |
1263 | if (type == 0x04) |
1264 | { | |
6eaa7fb5 L |
1265 | /* leal foo@tlsgd(,%ebx,1), %eax |
1266 | call ___tls_get_addr@PLT */ | |
142411ca L |
1267 | if (offset < 3) |
1268 | return FALSE; | |
1269 | ||
6eaa7fb5 L |
1270 | if (*(call - 7) != 0x8d |
1271 | || val != 0x1d | |
1272 | || call[0] != 0xe8) | |
142411ca L |
1273 | return FALSE; |
1274 | } | |
1275 | else | |
1276 | { | |
6eaa7fb5 L |
1277 | /* This must be |
1278 | leal foo@tlsgd(%ebx), %eax | |
1279 | call ___tls_get_addr@PLT | |
1280 | nop | |
1281 | or | |
1282 | leal foo@tlsgd(%reg), %eax | |
1283 | call *___tls_get_addr@GOT(%reg) | |
1284 | which may be converted to | |
1285 | addr32 call ___tls_get_addr | |
1286 | ||
1287 | %eax can't be used as the GOT base register since it | |
1288 | is used to pass parameter to ___tls_get_addr. */ | |
1289 | reg = val & 7; | |
1290 | if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0) | |
142411ca L |
1291 | return FALSE; |
1292 | ||
6eaa7fb5 L |
1293 | indirect_call = call[0] == 0xff; |
1294 | if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90) | |
1295 | && !(call[0] == 0x67 && call[1] == 0xe8) | |
1296 | && !(indirect_call | |
1297 | && (call[1] & 0xf8) == 0x90 | |
1298 | && (call[1] & 0x7) == reg)) | |
142411ca L |
1299 | return FALSE; |
1300 | } | |
1301 | } | |
1302 | else | |
1303 | { | |
1304 | /* Check transition from LD access model. Only | |
6eaa7fb5 L |
1305 | leal foo@tlsldm(%ebx), %eax |
1306 | call ___tls_get_addr@PLT | |
1307 | or | |
1308 | leal foo@tlsldm(%reg), %eax | |
1309 | call *___tls_get_addr@GOT(%reg) | |
1310 | which may be converted to | |
1311 | addr32 call ___tls_get_addr | |
142411ca L |
1312 | can transit to different access model. */ |
1313 | if (type != 0x8d || (offset + 9) > sec->size) | |
1314 | return FALSE; | |
1315 | ||
6eaa7fb5 L |
1316 | /* %eax can't be used as the GOT base register since it is |
1317 | used to pass parameter to ___tls_get_addr. */ | |
1318 | reg = val & 7; | |
1319 | if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0) | |
142411ca | 1320 | return FALSE; |
142411ca | 1321 | |
6eaa7fb5 L |
1322 | indirect_call = call[0] == 0xff; |
1323 | if (!(reg == 3 && call[0] == 0xe8) | |
1324 | && !(call[0] == 0x67 && call[1] == 0xe8) | |
1325 | && !(indirect_call | |
1326 | && (call[1] & 0xf8) == 0x90 | |
1327 | && (call[1] & 0x7) == reg)) | |
1328 | return FALSE; | |
1329 | } | |
142411ca L |
1330 | |
1331 | r_symndx = ELF32_R_SYM (rel[1].r_info); | |
1332 | if (r_symndx < symtab_hdr->sh_info) | |
1333 | return FALSE; | |
1334 | ||
6eaa7fb5 | 1335 | tls_get_addr = FALSE; |
142411ca | 1336 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
6eaa7fb5 L |
1337 | if (h != NULL && h->root.root.string != NULL) |
1338 | { | |
1339 | struct elf_i386_link_hash_entry *eh | |
1340 | = (struct elf_i386_link_hash_entry *) h; | |
1341 | tls_get_addr = eh->tls_get_addr == 1; | |
1342 | if (eh->tls_get_addr > 1) | |
1343 | { | |
1344 | /* Use strncmp to check ___tls_get_addr since | |
1345 | ___tls_get_addr may be versioned. */ | |
1346 | if (strncmp (h->root.root.string, "___tls_get_addr", 15) | |
1347 | == 0) | |
1348 | { | |
1349 | eh->tls_get_addr = 1; | |
1350 | tls_get_addr = TRUE; | |
1351 | } | |
1352 | else | |
1353 | eh->tls_get_addr = 0; | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | if (!tls_get_addr) | |
1358 | return FALSE; | |
1359 | else if (indirect_call) | |
1360 | return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X); | |
1361 | else | |
1362 | return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32 | |
1363 | || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); | |
142411ca L |
1364 | |
1365 | case R_386_TLS_IE: | |
1366 | /* Check transition from IE access model: | |
1367 | movl foo@indntpoff(%rip), %eax | |
1368 | movl foo@indntpoff(%rip), %reg | |
1369 | addl foo@indntpoff(%rip), %reg | |
1370 | */ | |
1371 | ||
1372 | if (offset < 1 || (offset + 4) > sec->size) | |
1373 | return FALSE; | |
1374 | ||
1375 | /* Check "movl foo@tpoff(%rip), %eax" first. */ | |
1376 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1377 | if (val == 0xa1) | |
1378 | return TRUE; | |
1379 | ||
1380 | if (offset < 2) | |
1381 | return FALSE; | |
1382 | ||
1383 | /* Check movl|addl foo@tpoff(%rip), %reg. */ | |
1384 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1385 | return ((type == 0x8b || type == 0x03) | |
1386 | && (val & 0xc7) == 0x05); | |
1387 | ||
1388 | case R_386_TLS_GOTIE: | |
1389 | case R_386_TLS_IE_32: | |
1390 | /* Check transition from {IE_32,GOTIE} access model: | |
1391 | subl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1392 | movl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1393 | addl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1394 | */ | |
1395 | ||
1396 | if (offset < 2 || (offset + 4) > sec->size) | |
1397 | return FALSE; | |
1398 | ||
1399 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1400 | if ((val & 0xc0) != 0x80 || (val & 7) == 4) | |
1401 | return FALSE; | |
1402 | ||
1403 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1404 | return type == 0x8b || type == 0x2b || type == 0x03; | |
1405 | ||
1406 | case R_386_TLS_GOTDESC: | |
1407 | /* Check transition from GDesc access model: | |
1408 | leal x@tlsdesc(%ebx), %eax | |
1409 | ||
1410 | Make sure it's a leal adding ebx to a 32-bit offset | |
1411 | into any register, although it's probably almost always | |
1412 | going to be eax. */ | |
1413 | ||
1414 | if (offset < 2 || (offset + 4) > sec->size) | |
1415 | return FALSE; | |
1416 | ||
1417 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1418 | return FALSE; | |
1419 | ||
1420 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1421 | return (val & 0xc7) == 0x83; | |
1422 | ||
1423 | case R_386_TLS_DESC_CALL: | |
1424 | /* Check transition from GDesc access model: | |
6eaa7fb5 | 1425 | call *x@tlsdesc(%eax) |
142411ca L |
1426 | */ |
1427 | if (offset + 2 <= sec->size) | |
1428 | { | |
6eaa7fb5 L |
1429 | /* Make sure that it's a call *x@tlsdesc(%eax). */ |
1430 | call = contents + offset; | |
1431 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1432 | } |
1433 | ||
1434 | return FALSE; | |
1435 | ||
1436 | default: | |
1437 | abort (); | |
1438 | } | |
1439 | } | |
1440 | ||
1441 | /* Return TRUE if the TLS access transition is OK or no transition | |
1442 | will be performed. Update R_TYPE if there is a transition. */ | |
1443 | ||
1444 | static bfd_boolean | |
1445 | elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd, | |
1446 | asection *sec, bfd_byte *contents, | |
1447 | Elf_Internal_Shdr *symtab_hdr, | |
1448 | struct elf_link_hash_entry **sym_hashes, | |
1449 | unsigned int *r_type, int tls_type, | |
1450 | const Elf_Internal_Rela *rel, | |
1451 | const Elf_Internal_Rela *relend, | |
4c544807 | 1452 | struct elf_link_hash_entry *h, |
bedfd056 L |
1453 | unsigned long r_symndx, |
1454 | bfd_boolean from_relocate_section) | |
142411ca L |
1455 | { |
1456 | unsigned int from_type = *r_type; | |
1457 | unsigned int to_type = from_type; | |
1458 | bfd_boolean check = TRUE; | |
1459 | ||
bb1cb422 L |
1460 | /* Skip TLS transition for functions. */ |
1461 | if (h != NULL | |
1462 | && (h->type == STT_FUNC | |
1463 | || h->type == STT_GNU_IFUNC)) | |
1464 | return TRUE; | |
1465 | ||
142411ca | 1466 | switch (from_type) |
13ae64f3 JJ |
1467 | { |
1468 | case R_386_TLS_GD: | |
67a4f2b7 AO |
1469 | case R_386_TLS_GOTDESC: |
1470 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 1471 | case R_386_TLS_IE_32: |
37e55690 JJ |
1472 | case R_386_TLS_IE: |
1473 | case R_386_TLS_GOTIE: | |
0e1862bb | 1474 | if (bfd_link_executable (info)) |
142411ca L |
1475 | { |
1476 | if (h == NULL) | |
1477 | to_type = R_386_TLS_LE_32; | |
1478 | else if (from_type != R_386_TLS_IE | |
1479 | && from_type != R_386_TLS_GOTIE) | |
1480 | to_type = R_386_TLS_IE_32; | |
1481 | } | |
1482 | ||
bedfd056 L |
1483 | /* When we are called from elf_i386_relocate_section, there may |
1484 | be additional transitions based on TLS_TYPE. */ | |
1485 | if (from_relocate_section) | |
142411ca L |
1486 | { |
1487 | unsigned int new_to_type = to_type; | |
1488 | ||
0e1862bb | 1489 | if (bfd_link_executable (info) |
142411ca L |
1490 | && h != NULL |
1491 | && h->dynindx == -1 | |
1492 | && (tls_type & GOT_TLS_IE)) | |
1493 | new_to_type = R_386_TLS_LE_32; | |
1494 | ||
1495 | if (to_type == R_386_TLS_GD | |
1496 | || to_type == R_386_TLS_GOTDESC | |
1497 | || to_type == R_386_TLS_DESC_CALL) | |
1498 | { | |
1499 | if (tls_type == GOT_TLS_IE_POS) | |
1500 | new_to_type = R_386_TLS_GOTIE; | |
1501 | else if (tls_type & GOT_TLS_IE) | |
1502 | new_to_type = R_386_TLS_IE_32; | |
1503 | } | |
1504 | ||
1505 | /* We checked the transition before when we were called from | |
1506 | elf_i386_check_relocs. We only want to check the new | |
1507 | transition which hasn't been checked before. */ | |
1508 | check = new_to_type != to_type && from_type == to_type; | |
1509 | to_type = new_to_type; | |
1510 | } | |
1511 | ||
1512 | break; | |
1513 | ||
13ae64f3 | 1514 | case R_386_TLS_LDM: |
0e1862bb | 1515 | if (bfd_link_executable (info)) |
142411ca L |
1516 | to_type = R_386_TLS_LE_32; |
1517 | break; | |
1518 | ||
1519 | default: | |
1520 | return TRUE; | |
1521 | } | |
1522 | ||
1523 | /* Return TRUE if there is no transition. */ | |
1524 | if (from_type == to_type) | |
1525 | return TRUE; | |
1526 | ||
1527 | /* Check if the transition can be performed. */ | |
1528 | if (check | |
bedfd056 | 1529 | && ! elf_i386_check_tls_transition (sec, contents, |
142411ca L |
1530 | symtab_hdr, sym_hashes, |
1531 | from_type, rel, relend)) | |
1532 | { | |
2f629d23 | 1533 | reloc_howto_type *from, *to; |
4c544807 | 1534 | const char *name; |
142411ca L |
1535 | |
1536 | from = elf_i386_rtype_to_howto (abfd, from_type); | |
1537 | to = elf_i386_rtype_to_howto (abfd, to_type); | |
1538 | ||
4c544807 L |
1539 | if (h) |
1540 | name = h->root.root.string; | |
1541 | else | |
1542 | { | |
4c544807 | 1543 | struct elf_i386_link_hash_table *htab; |
4dfe6ac6 | 1544 | |
4c544807 | 1545 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1546 | if (htab == NULL) |
1547 | name = "*unknown*"; | |
1548 | else | |
1549 | { | |
1550 | Elf_Internal_Sym *isym; | |
1551 | ||
1552 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1553 | abfd, r_symndx); | |
1554 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1555 | } | |
4c544807 L |
1556 | } |
1557 | ||
142411ca L |
1558 | (*_bfd_error_handler) |
1559 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1560 | "in section `%A' failed"), | |
4c544807 | 1561 | abfd, sec, from->name, to->name, name, |
142411ca L |
1562 | (unsigned long) rel->r_offset); |
1563 | bfd_set_error (bfd_error_bad_value); | |
1564 | return FALSE; | |
13ae64f3 JJ |
1565 | } |
1566 | ||
142411ca L |
1567 | *r_type = to_type; |
1568 | return TRUE; | |
13ae64f3 JJ |
1569 | } |
1570 | ||
c175a657 L |
1571 | /* With the local symbol, foo, we convert |
1572 | mov foo@GOT[(%reg1)], %reg2 | |
1573 | to | |
1574 | lea foo[@GOTOFF(%reg1)], %reg2 | |
1575 | and convert | |
1576 | call/jmp *foo@GOT[(%reg)] | |
1577 | to | |
1578 | nop call foo/jmp foo nop | |
1579 | When PIC is false, convert | |
1580 | test %reg1, foo@GOT[(%reg2)] | |
1581 | to | |
1582 | test $foo, %reg1 | |
1583 | and convert | |
1584 | binop foo@GOT[(%reg1)], %reg2 | |
1585 | to | |
1586 | binop $foo, %reg2 | |
1587 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1588 | instructions. */ | |
1589 | ||
1590 | static | |
1591 | bfd_boolean | |
1592 | elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr, | |
1593 | bfd_byte *contents, | |
1594 | Elf_Internal_Rela *irel, | |
1595 | struct elf_link_hash_entry *h, | |
1596 | bfd_boolean *converted, | |
1597 | struct bfd_link_info *link_info) | |
1598 | { | |
1599 | struct elf_i386_link_hash_table *htab; | |
1600 | unsigned int opcode; | |
1601 | unsigned int modrm; | |
1602 | bfd_boolean baseless; | |
1603 | Elf_Internal_Sym *isym; | |
1604 | unsigned int addend; | |
1605 | unsigned int nop; | |
1606 | bfd_vma nop_offset; | |
1607 | bfd_boolean is_pic; | |
1608 | bfd_boolean to_reloc_32; | |
1609 | unsigned int r_type; | |
1610 | unsigned int r_symndx; | |
1611 | bfd_vma roff = irel->r_offset; | |
1612 | ||
1613 | if (roff < 2) | |
1614 | return TRUE; | |
1615 | ||
7d4d9709 | 1616 | /* Addend for R_386_GOT32X relocations must be 0. */ |
c175a657 L |
1617 | addend = bfd_get_32 (abfd, contents + roff); |
1618 | if (addend != 0) | |
1619 | return TRUE; | |
1620 | ||
1621 | htab = elf_i386_hash_table (link_info); | |
1622 | is_pic = bfd_link_pic (link_info); | |
1623 | ||
1624 | r_type = ELF32_R_TYPE (irel->r_info); | |
1625 | r_symndx = ELF32_R_SYM (irel->r_info); | |
1626 | ||
1627 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1628 | baseless = (modrm & 0xc7) == 0x5; | |
1629 | ||
7d4d9709 | 1630 | if (baseless && is_pic) |
c175a657 L |
1631 | { |
1632 | /* For PIC, disallow R_386_GOT32X without a base register | |
7d4d9709 | 1633 | since we don't know what the GOT base is. */ |
c175a657 L |
1634 | const char *name; |
1635 | ||
1636 | if (h == NULL) | |
1637 | { | |
1638 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, | |
1639 | r_symndx); | |
1640 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1641 | } | |
1642 | else | |
1643 | name = h->root.root.string; | |
1644 | ||
1645 | (*_bfd_error_handler) | |
1646 | (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base register can not be used when making a shared object"), | |
1647 | abfd, name); | |
1648 | return FALSE; | |
1649 | } | |
1650 | ||
1651 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1652 | ||
c175a657 L |
1653 | /* Convert to R_386_32 if PIC is false or there is no base |
1654 | register. */ | |
1655 | to_reloc_32 = !is_pic || baseless; | |
1656 | ||
7d4d9709 L |
1657 | /* Try to convert R_386_GOT32X. Get the symbol referred to by the |
1658 | reloc. */ | |
c175a657 L |
1659 | if (h == NULL) |
1660 | { | |
1661 | if (opcode == 0x0ff) | |
1662 | /* Convert "call/jmp *foo@GOT[(%reg)]". */ | |
1663 | goto convert_branch; | |
1664 | else | |
1665 | /* Convert "mov foo@GOT[(%reg1)], %reg2", | |
1666 | "test %reg1, foo@GOT(%reg2)" and | |
1667 | "binop foo@GOT[(%reg1)], %reg2". */ | |
1668 | goto convert_load; | |
1669 | } | |
1670 | ||
1671 | /* Undefined weak symbol is only bound locally in executable | |
1672 | and its reference is resolved as 0. */ | |
1673 | if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, TRUE, | |
1674 | elf_i386_hash_entry (h))) | |
1675 | { | |
1676 | if (opcode == 0xff) | |
1677 | { | |
1678 | /* No direct branch to 0 for PIC. */ | |
1679 | if (is_pic) | |
1680 | return TRUE; | |
1681 | else | |
1682 | goto convert_branch; | |
1683 | } | |
1684 | else | |
1685 | { | |
1686 | /* We can convert load of address 0 to R_386_32. */ | |
1687 | to_reloc_32 = TRUE; | |
1688 | goto convert_load; | |
1689 | } | |
1690 | } | |
1691 | ||
1692 | if (opcode == 0xff) | |
1693 | { | |
1694 | /* We have "call/jmp *foo@GOT[(%reg)]". */ | |
1695 | if ((h->root.type == bfd_link_hash_defined | |
1696 | || h->root.type == bfd_link_hash_defweak) | |
1697 | && SYMBOL_REFERENCES_LOCAL (link_info, h)) | |
1698 | { | |
1699 | /* The function is locally defined. */ | |
1700 | convert_branch: | |
1701 | /* Convert R_386_GOT32X to R_386_PC32. */ | |
1702 | if (modrm == 0x15 || (modrm & 0xf8) == 0x90) | |
1703 | { | |
6eaa7fb5 L |
1704 | struct elf_i386_link_hash_entry *eh |
1705 | = (struct elf_i386_link_hash_entry *) h; | |
1706 | ||
c175a657 L |
1707 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
1708 | is a nop prefix. */ | |
1709 | modrm = 0xe8; | |
6eaa7fb5 L |
1710 | /* To support TLS optimization, always use addr32 prefix |
1711 | for "call *___tls_get_addr@GOT(%reg)". */ | |
1712 | if (eh && eh->tls_get_addr == 1) | |
c175a657 | 1713 | { |
6eaa7fb5 L |
1714 | nop = 0x67; |
1715 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1716 | } |
1717 | else | |
6eaa7fb5 L |
1718 | { |
1719 | nop = link_info->call_nop_byte; | |
1720 | if (link_info->call_nop_as_suffix) | |
1721 | { | |
1722 | nop_offset = roff + 3; | |
1723 | irel->r_offset -= 1; | |
1724 | } | |
1725 | else | |
1726 | nop_offset = roff - 2; | |
1727 | } | |
c175a657 L |
1728 | } |
1729 | else | |
1730 | { | |
1731 | /* Convert to "jmp foo nop". */ | |
1732 | modrm = 0xe9; | |
1733 | nop = NOP_OPCODE; | |
1734 | nop_offset = roff + 3; | |
1735 | irel->r_offset -= 1; | |
1736 | } | |
1737 | ||
1738 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1739 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1740 | /* When converting to PC-relative relocation, we | |
1741 | need to adjust addend by -4. */ | |
1742 | bfd_put_32 (abfd, -4, contents + irel->r_offset); | |
1743 | irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32); | |
1744 | ||
1745 | *converted = TRUE; | |
1746 | } | |
1747 | } | |
1748 | else | |
1749 | { | |
1750 | /* We have "mov foo@GOT[(%re1g)], %reg2", | |
1751 | "test %reg1, foo@GOT(%reg2)" and | |
1752 | "binop foo@GOT[(%reg1)], %reg2". | |
1753 | ||
1754 | Avoid optimizing _DYNAMIC since ld.so may use its | |
1755 | link-time address. */ | |
1756 | if (h == htab->elf.hdynamic) | |
1757 | return TRUE; | |
1758 | ||
1759 | /* def_regular is set by an assignment in a linker script in | |
1760 | bfd_elf_record_link_assignment. */ | |
1761 | if ((h->def_regular | |
1762 | || h->root.type == bfd_link_hash_defined | |
1763 | || h->root.type == bfd_link_hash_defweak) | |
1764 | && SYMBOL_REFERENCES_LOCAL (link_info, h)) | |
1765 | { | |
1766 | convert_load: | |
1767 | if (opcode == 0x8b) | |
1768 | { | |
1769 | if (to_reloc_32) | |
1770 | { | |
1771 | /* Convert "mov foo@GOT[(%reg1)], %reg2" to | |
1772 | "mov $foo, %reg2" with R_386_32. */ | |
1773 | r_type = R_386_32; | |
1774 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1775 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1776 | opcode = 0xc7; | |
1777 | } | |
1778 | else | |
1779 | { | |
1780 | /* Convert "mov foo@GOT(%reg1), %reg2" to | |
1781 | "lea foo@GOTOFF(%reg1), %reg2". */ | |
1782 | r_type = R_386_GOTOFF; | |
1783 | opcode = 0x8d; | |
1784 | } | |
1785 | } | |
1786 | else | |
1787 | { | |
1788 | /* Only R_386_32 is supported. */ | |
1789 | if (!to_reloc_32) | |
1790 | return TRUE; | |
1791 | ||
1792 | if (opcode == 0x85) | |
1793 | { | |
1794 | /* Convert "test %reg1, foo@GOT(%reg2)" to | |
1795 | "test $foo, %reg1". */ | |
1796 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1797 | opcode = 0xf7; | |
1798 | } | |
1799 | else | |
1800 | { | |
1801 | /* Convert "binop foo@GOT(%reg1), %reg2" to | |
1802 | "binop $foo, %reg2". */ | |
1803 | modrm = (0xc0 | |
1804 | | (modrm & 0x38) >> 3 | |
1805 | | (opcode & 0x3c)); | |
1806 | opcode = 0x81; | |
1807 | } | |
1808 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1809 | r_type = R_386_32; | |
1810 | } | |
1811 | ||
1812 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1813 | irel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
1814 | ||
1815 | *converted = TRUE; | |
1816 | } | |
1817 | } | |
1818 | ||
1819 | return TRUE; | |
1820 | } | |
1821 | ||
c1d11331 L |
1822 | /* Rename some of the generic section flags to better document how they |
1823 | are used here. */ | |
c337a162 L |
1824 | #define need_convert_load sec_flg0 |
1825 | #define check_relocs_failed sec_flg1 | |
c1d11331 | 1826 | |
252b5132 | 1827 | /* Look through the relocs for a section during the first phase, and |
0ac8d2ca AM |
1828 | calculate needed space in the global offset table, procedure linkage |
1829 | table, and dynamic reloc sections. */ | |
252b5132 | 1830 | |
b34976b6 | 1831 | static bfd_boolean |
55fd94b0 AM |
1832 | elf_i386_check_relocs (bfd *abfd, |
1833 | struct bfd_link_info *info, | |
1834 | asection *sec, | |
1835 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1836 | { |
6725bdbf | 1837 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
1838 | Elf_Internal_Shdr *symtab_hdr; |
1839 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
1840 | const Elf_Internal_Rela *rel; |
1841 | const Elf_Internal_Rela *rel_end; | |
252b5132 | 1842 | asection *sreloc; |
bedfd056 | 1843 | bfd_byte *contents; |
dd7e64d4 | 1844 | bfd_boolean use_plt_got; |
252b5132 | 1845 | |
0e1862bb | 1846 | if (bfd_link_relocatable (info)) |
b34976b6 | 1847 | return TRUE; |
252b5132 | 1848 | |
081b1afe L |
1849 | /* Don't do anything special with non-loaded, non-alloced sections. |
1850 | In particular, any relocs in such sections should not affect GOT | |
1851 | and PLT reference counting (ie. we don't allow them to create GOT | |
1852 | or PLT entries), there's no possibility or desire to optimize TLS | |
1853 | relocs, and there's not much point in propagating relocs to shared | |
1854 | libs that the dynamic linker won't relocate. */ | |
1855 | if ((sec->flags & SEC_ALLOC) == 0) | |
1856 | return TRUE; | |
1857 | ||
0ffa91dd NC |
1858 | BFD_ASSERT (is_i386_elf (abfd)); |
1859 | ||
6725bdbf | 1860 | htab = elf_i386_hash_table (info); |
4dfe6ac6 | 1861 | if (htab == NULL) |
c337a162 L |
1862 | { |
1863 | sec->check_relocs_failed = 1; | |
1864 | return FALSE; | |
1865 | } | |
4dfe6ac6 | 1866 | |
bedfd056 L |
1867 | /* Get the section contents. */ |
1868 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1869 | contents = elf_section_data (sec)->this_hdr.contents; | |
1870 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1871 | { | |
1872 | sec->check_relocs_failed = 1; | |
1873 | return FALSE; | |
1874 | } | |
1875 | ||
dd7e64d4 L |
1876 | use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks |
1877 | && (get_elf_i386_backend_data (abfd) | |
1878 | == &elf_i386_arch_bed)); | |
1879 | ||
0ffa91dd | 1880 | symtab_hdr = &elf_symtab_hdr (abfd); |
252b5132 | 1881 | sym_hashes = elf_sym_hashes (abfd); |
252b5132 | 1882 | |
252b5132 RH |
1883 | sreloc = NULL; |
1884 | ||
1885 | rel_end = relocs + sec->reloc_count; | |
1886 | for (rel = relocs; rel < rel_end; rel++) | |
1887 | { | |
13ae64f3 | 1888 | unsigned int r_type; |
252b5132 RH |
1889 | unsigned long r_symndx; |
1890 | struct elf_link_hash_entry *h; | |
d5597ebc | 1891 | struct elf_i386_link_hash_entry *eh; |
4c544807 L |
1892 | Elf_Internal_Sym *isym; |
1893 | const char *name; | |
06a6a421 | 1894 | bfd_boolean size_reloc; |
252b5132 RH |
1895 | |
1896 | r_symndx = ELF32_R_SYM (rel->r_info); | |
13ae64f3 | 1897 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 1898 | |
d9bc7a44 | 1899 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
f5f31454 | 1900 | { |
d003868e AM |
1901 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1902 | abfd, | |
8f615d07 | 1903 | r_symndx); |
c337a162 | 1904 | goto error_return; |
f5f31454 L |
1905 | } |
1906 | ||
252b5132 | 1907 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1908 | { |
1909 | /* A local symbol. */ | |
c2e61a4e L |
1910 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1911 | abfd, r_symndx); | |
1912 | if (isym == NULL) | |
c337a162 | 1913 | goto error_return; |
c25bc9fc L |
1914 | |
1915 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
c25bc9fc L |
1916 | if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
1917 | { | |
9fff0c39 | 1918 | h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE); |
c25bc9fc | 1919 | if (h == NULL) |
c337a162 | 1920 | goto error_return; |
6bbec505 | 1921 | |
c25bc9fc L |
1922 | /* Fake a STT_GNU_IFUNC symbol. */ |
1923 | h->type = STT_GNU_IFUNC; | |
1924 | h->def_regular = 1; | |
1925 | h->ref_regular = 1; | |
1926 | h->forced_local = 1; | |
1927 | h->root.type = bfd_link_hash_defined; | |
1928 | } | |
1929 | else | |
1930 | h = NULL; | |
1931 | } | |
252b5132 | 1932 | else |
71cb9464 | 1933 | { |
4c544807 | 1934 | isym = NULL; |
71cb9464 L |
1935 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1936 | while (h->root.type == bfd_link_hash_indirect | |
1937 | || h->root.type == bfd_link_hash_warning) | |
1938 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1939 | } |
cbe950e9 | 1940 | |
d5597ebc | 1941 | eh = (struct elf_i386_link_hash_entry *) h; |
c25bc9fc L |
1942 | if (h != NULL) |
1943 | { | |
cbe950e9 L |
1944 | switch (r_type) |
1945 | { | |
1946 | default: | |
1947 | break; | |
1948 | ||
d5597ebc L |
1949 | case R_386_GOTOFF: |
1950 | eh->gotoff_ref = 1; | |
cbe950e9 L |
1951 | case R_386_32: |
1952 | case R_386_PC32: | |
1953 | case R_386_PLT32: | |
1954 | case R_386_GOT32: | |
02a86693 | 1955 | case R_386_GOT32X: |
9d4057ee AM |
1956 | if (htab->elf.dynobj == NULL) |
1957 | htab->elf.dynobj = abfd; | |
466ee2af L |
1958 | /* Create the ifunc sections for static executables. */ |
1959 | if (h->type == STT_GNU_IFUNC | |
1960 | && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj, | |
1961 | info)) | |
c337a162 | 1962 | goto error_return; |
cbe950e9 L |
1963 | break; |
1964 | } | |
1965 | ||
ad1e85de L |
1966 | /* It is referenced by a non-shared object. */ |
1967 | h->ref_regular = 1; | |
61315175 | 1968 | h->root.non_ir_ref = 1; |
13a2df29 L |
1969 | |
1970 | if (h->type == STT_GNU_IFUNC) | |
1971 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
1972 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 1973 | } |
252b5132 | 1974 | |
bedfd056 | 1975 | if (! elf_i386_tls_transition (info, abfd, sec, contents, |
142411ca L |
1976 | symtab_hdr, sym_hashes, |
1977 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 1978 | rel, rel_end, h, r_symndx, FALSE)) |
c337a162 | 1979 | goto error_return; |
13ae64f3 JJ |
1980 | |
1981 | switch (r_type) | |
252b5132 | 1982 | { |
37e55690 JJ |
1983 | case R_386_TLS_LDM: |
1984 | htab->tls_ldm_got.refcount += 1; | |
1985 | goto create_got; | |
1986 | ||
1987 | case R_386_PLT32: | |
1988 | /* This symbol requires a procedure linkage table entry. We | |
1989 | actually build the entry in adjust_dynamic_symbol, | |
1990 | because this might be a case of linking PIC code which is | |
1991 | never referenced by a dynamic object, in which case we | |
1992 | don't need to generate a procedure linkage table entry | |
1993 | after all. */ | |
1994 | ||
1995 | /* If this is a local symbol, we resolve it directly without | |
1996 | creating a procedure linkage table entry. */ | |
1997 | if (h == NULL) | |
1998 | continue; | |
1999 | ||
aec6b87e | 2000 | eh->has_got_reloc = 1; |
f5385ebf | 2001 | h->needs_plt = 1; |
37e55690 JJ |
2002 | h->plt.refcount += 1; |
2003 | break; | |
2004 | ||
6a3e1bae | 2005 | case R_386_SIZE32: |
06a6a421 | 2006 | size_reloc = TRUE; |
6a3e1bae L |
2007 | goto do_size; |
2008 | ||
13ae64f3 | 2009 | case R_386_TLS_IE_32: |
37e55690 JJ |
2010 | case R_386_TLS_IE: |
2011 | case R_386_TLS_GOTIE: | |
0e1862bb | 2012 | if (!bfd_link_executable (info)) |
13ae64f3 | 2013 | info->flags |= DF_STATIC_TLS; |
37e55690 JJ |
2014 | /* Fall through */ |
2015 | ||
252b5132 | 2016 | case R_386_GOT32: |
02a86693 | 2017 | case R_386_GOT32X: |
13ae64f3 | 2018 | case R_386_TLS_GD: |
67a4f2b7 AO |
2019 | case R_386_TLS_GOTDESC: |
2020 | case R_386_TLS_DESC_CALL: | |
252b5132 | 2021 | /* This symbol requires a global offset table entry. */ |
13ae64f3 JJ |
2022 | { |
2023 | int tls_type, old_tls_type; | |
2024 | ||
2025 | switch (r_type) | |
2026 | { | |
2027 | default: | |
02a86693 L |
2028 | case R_386_GOT32: |
2029 | case R_386_GOT32X: | |
2030 | tls_type = GOT_NORMAL; | |
2031 | break; | |
13ae64f3 | 2032 | case R_386_TLS_GD: tls_type = GOT_TLS_GD; break; |
67a4f2b7 AO |
2033 | case R_386_TLS_GOTDESC: |
2034 | case R_386_TLS_DESC_CALL: | |
2035 | tls_type = GOT_TLS_GDESC; break; | |
37e55690 JJ |
2036 | case R_386_TLS_IE_32: |
2037 | if (ELF32_R_TYPE (rel->r_info) == r_type) | |
2038 | tls_type = GOT_TLS_IE_NEG; | |
2039 | else | |
ebcfb3c0 JJ |
2040 | /* If this is a GD->IE transition, we may use either of |
2041 | R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */ | |
37e55690 JJ |
2042 | tls_type = GOT_TLS_IE; |
2043 | break; | |
2044 | case R_386_TLS_IE: | |
2045 | case R_386_TLS_GOTIE: | |
2046 | tls_type = GOT_TLS_IE_POS; break; | |
13ae64f3 JJ |
2047 | } |
2048 | ||
2049 | if (h != NULL) | |
2050 | { | |
2051 | h->got.refcount += 1; | |
2052 | old_tls_type = elf_i386_hash_entry(h)->tls_type; | |
2053 | } | |
2054 | else | |
2055 | { | |
2056 | bfd_signed_vma *local_got_refcounts; | |
2057 | ||
2058 | /* This is a global offset table entry for a local symbol. */ | |
2059 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2060 | if (local_got_refcounts == NULL) | |
2061 | { | |
2062 | bfd_size_type size; | |
2063 | ||
2064 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
2065 | size *= (sizeof (bfd_signed_vma) |
2066 | + sizeof (bfd_vma) + sizeof(char)); | |
a50b1753 NC |
2067 | local_got_refcounts = (bfd_signed_vma *) |
2068 | bfd_zalloc (abfd, size); | |
13ae64f3 | 2069 | if (local_got_refcounts == NULL) |
c337a162 | 2070 | goto error_return; |
13ae64f3 | 2071 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
67a4f2b7 AO |
2072 | elf_i386_local_tlsdesc_gotent (abfd) |
2073 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); | |
13ae64f3 | 2074 | elf_i386_local_got_tls_type (abfd) |
67a4f2b7 | 2075 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
13ae64f3 JJ |
2076 | } |
2077 | local_got_refcounts[r_symndx] += 1; | |
2078 | old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx]; | |
2079 | } | |
2080 | ||
37e55690 JJ |
2081 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) |
2082 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
2083 | /* If a TLS symbol is accessed using IE at least once, |
2084 | there is no point to use dynamic model for it. */ | |
ebcfb3c0 | 2085 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN |
67a4f2b7 | 2086 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
37e55690 | 2087 | || (tls_type & GOT_TLS_IE) == 0)) |
13ae64f3 | 2088 | { |
67a4f2b7 | 2089 | if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type)) |
37e55690 | 2090 | tls_type = old_tls_type; |
67a4f2b7 AO |
2091 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2092 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2093 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
2094 | else |
2095 | { | |
09a24cbf | 2096 | if (h) |
4c544807 L |
2097 | name = h->root.root.string; |
2098 | else | |
2099 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
2100 | NULL); | |
13ae64f3 | 2101 | (*_bfd_error_handler) |
d003868e | 2102 | (_("%B: `%s' accessed both as normal and " |
55fd94b0 | 2103 | "thread local symbol"), |
4c544807 | 2104 | abfd, name); |
68c4a57e | 2105 | bfd_set_error (bfd_error_bad_value); |
c337a162 | 2106 | goto error_return; |
13ae64f3 JJ |
2107 | } |
2108 | } | |
2109 | ||
2110 | if (old_tls_type != tls_type) | |
2111 | { | |
2112 | if (h != NULL) | |
2113 | elf_i386_hash_entry (h)->tls_type = tls_type; | |
2114 | else | |
2115 | elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
2116 | } | |
2117 | } | |
0ac8d2ca AM |
2118 | /* Fall through */ |
2119 | ||
2120 | case R_386_GOTOFF: | |
2121 | case R_386_GOTPC: | |
13ae64f3 | 2122 | create_got: |
6de2ae4a | 2123 | if (htab->elf.sgot == NULL) |
0ac8d2ca AM |
2124 | { |
2125 | if (htab->elf.dynobj == NULL) | |
2126 | htab->elf.dynobj = abfd; | |
6de2ae4a | 2127 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) |
c337a162 | 2128 | goto error_return; |
0ac8d2ca | 2129 | } |
37e55690 | 2130 | if (r_type != R_386_TLS_IE) |
aec6b87e L |
2131 | { |
2132 | if (eh != NULL) | |
2133 | eh->has_got_reloc = 1; | |
2134 | break; | |
2135 | } | |
37e55690 | 2136 | /* Fall through */ |
252b5132 | 2137 | |
37e55690 JJ |
2138 | case R_386_TLS_LE_32: |
2139 | case R_386_TLS_LE: | |
aec6b87e L |
2140 | if (eh != NULL) |
2141 | eh->has_got_reloc = 1; | |
0e1862bb | 2142 | if (bfd_link_executable (info)) |
37e55690 | 2143 | break; |
bffbf940 | 2144 | info->flags |= DF_STATIC_TLS; |
aec6b87e | 2145 | goto do_relocation; |
252b5132 RH |
2146 | |
2147 | case R_386_32: | |
2148 | case R_386_PC32: | |
aec6b87e L |
2149 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
2150 | eh->has_non_got_reloc = 1; | |
2151 | do_relocation: | |
bf52d7c7 L |
2152 | /* We are called after all symbols have been resolved. Only |
2153 | relocation against STT_GNU_IFUNC symbol must go through | |
2154 | PLT. */ | |
d1ed1c7d L |
2155 | if (h != NULL |
2156 | && (bfd_link_executable (info) | |
bf52d7c7 | 2157 | || h->type == STT_GNU_IFUNC)) |
6725bdbf | 2158 | { |
12d0ee4a | 2159 | /* If this reloc is in a read-only section, we might |
ebe50bae AM |
2160 | need a copy reloc. We can't check reliably at this |
2161 | stage whether the section is read-only, as input | |
2162 | sections have not yet been mapped to output sections. | |
2163 | Tentatively set the flag for now, and correct in | |
2164 | adjust_dynamic_symbol. */ | |
f5385ebf | 2165 | h->non_got_ref = 1; |
12d0ee4a | 2166 | |
233cc9c1 L |
2167 | /* We may need a .plt entry if the symbol is a function |
2168 | defined in a shared lib or is a STT_GNU_IFUNC function | |
2169 | referenced from the code or read-only section. */ | |
2170 | if (!h->def_regular | |
2171 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
2172 | h->plt.refcount += 1; | |
2173 | ||
4b627c18 L |
2174 | if (r_type == R_386_PC32) |
2175 | { | |
2176 | /* Since something like ".long foo - ." may be used | |
2177 | as pointer, make sure that PLT is used if foo is | |
2178 | a function defined in a shared library. */ | |
2179 | if ((sec->flags & SEC_CODE) == 0) | |
2180 | h->pointer_equality_needed = 1; | |
74437ea2 L |
2181 | else if (h->type == STT_GNU_IFUNC |
2182 | && bfd_link_pic (info)) | |
2183 | { | |
2184 | if (isym == NULL) | |
2185 | name = h->root.root.string; | |
2186 | else | |
2187 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
2188 | NULL); | |
2189 | (*_bfd_error_handler) | |
2190 | (_("%B: unsupported non-PIC call to IFUNC `%s'"), | |
2191 | abfd, name); | |
2192 | bfd_set_error (bfd_error_bad_value); | |
2193 | goto error_return; | |
2194 | } | |
4b627c18 L |
2195 | } |
2196 | else | |
04ebc307 L |
2197 | { |
2198 | h->pointer_equality_needed = 1; | |
2199 | /* R_386_32 can be resolved at run-time. */ | |
2200 | if (r_type == R_386_32 | |
2201 | && (sec->flags & SEC_READONLY) == 0) | |
2202 | eh->func_pointer_refcount += 1; | |
2203 | } | |
6725bdbf | 2204 | } |
7843f00e | 2205 | |
06a6a421 | 2206 | size_reloc = FALSE; |
6a3e1bae | 2207 | do_size: |
252b5132 | 2208 | /* If we are creating a shared library, and this is a reloc |
f69da49f AM |
2209 | against a global symbol, or a non PC relative reloc |
2210 | against a local symbol, then we need to copy the reloc | |
2211 | into the shared library. However, if we are linking with | |
2212 | -Bsymbolic, we do not need to copy a reloc against a | |
2213 | global symbol which is defined in an object we are | |
2214 | including in the link (i.e., DEF_REGULAR is set). At | |
2215 | this point we have not seen all the input files, so it is | |
2216 | possible that DEF_REGULAR is not set now but will be set | |
1f655a09 L |
2217 | later (it is never cleared). In case of a weak definition, |
2218 | DEF_REGULAR may be cleared later by a strong definition in | |
ebe50bae | 2219 | a shared library. We account for that possibility below by |
1f655a09 L |
2220 | storing information in the relocs_copied field of the hash |
2221 | table entry. A similar situation occurs when creating | |
2222 | shared libraries and symbol visibility changes render the | |
12d0ee4a | 2223 | symbol local. |
56882138 | 2224 | |
12d0ee4a AM |
2225 | If on the other hand, we are creating an executable, we |
2226 | may need to keep relocations for symbols satisfied by a | |
2227 | dynamic library if we manage to avoid copy relocs for the | |
233cc9c1 L |
2228 | symbol. |
2229 | ||
2230 | Generate dynamic pointer relocation against STT_GNU_IFUNC | |
2231 | symbol in the non-code section. */ | |
081b1afe L |
2232 | if ((bfd_link_pic (info) |
2233 | && (r_type != R_386_PC32 | |
2234 | || (h != NULL | |
2235 | && (! (bfd_link_pie (info) | |
2236 | || SYMBOLIC_BIND (info, h)) | |
2237 | || h->root.type == bfd_link_hash_defweak | |
2238 | || !h->def_regular)))) | |
233cc9c1 L |
2239 | || (h != NULL |
2240 | && h->type == STT_GNU_IFUNC | |
2241 | && r_type == R_386_32 | |
2242 | && (sec->flags & SEC_CODE) == 0) | |
081b1afe L |
2243 | || (ELIMINATE_COPY_RELOCS |
2244 | && !bfd_link_pic (info) | |
2245 | && h != NULL | |
2246 | && (h->root.type == bfd_link_hash_defweak | |
2247 | || !h->def_regular))) | |
252b5132 | 2248 | { |
e03a8ed8 L |
2249 | struct elf_dyn_relocs *p; |
2250 | struct elf_dyn_relocs **head; | |
ec338859 | 2251 | |
12d0ee4a AM |
2252 | /* We must copy these reloc types into the output file. |
2253 | Create a reloc section in dynobj and make room for | |
2254 | this reloc. */ | |
252b5132 RH |
2255 | if (sreloc == NULL) |
2256 | { | |
0ac8d2ca AM |
2257 | if (htab->elf.dynobj == NULL) |
2258 | htab->elf.dynobj = abfd; | |
2259 | ||
83bac4b0 NC |
2260 | sreloc = _bfd_elf_make_dynamic_reloc_section |
2261 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE); | |
2262 | ||
252b5132 | 2263 | if (sreloc == NULL) |
c337a162 | 2264 | goto error_return; |
252b5132 RH |
2265 | } |
2266 | ||
0c715baa AM |
2267 | /* If this is a global symbol, we count the number of |
2268 | relocations we need for this symbol. */ | |
2269 | if (h != NULL) | |
252b5132 | 2270 | { |
d5597ebc | 2271 | head = &eh->dyn_relocs; |
0c715baa AM |
2272 | } |
2273 | else | |
2274 | { | |
ec338859 AM |
2275 | /* Track dynamic relocs needed for local syms too. |
2276 | We really need local syms available to do this | |
2277 | easily. Oh well. */ | |
87d72d41 | 2278 | void **vpp; |
ec338859 | 2279 | asection *s; |
87d72d41 AM |
2280 | |
2281 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2282 | abfd, r_symndx); | |
2283 | if (isym == NULL) | |
c337a162 | 2284 | goto error_return; |
87d72d41 AM |
2285 | |
2286 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
ec338859 | 2287 | if (s == NULL) |
87d72d41 | 2288 | s = sec; |
ec338859 | 2289 | |
e81d3500 | 2290 | vpp = &elf_section_data (s)->local_dynrel; |
e03a8ed8 | 2291 | head = (struct elf_dyn_relocs **)vpp; |
ec338859 AM |
2292 | } |
2293 | ||
2294 | p = *head; | |
2295 | if (p == NULL || p->sec != sec) | |
2296 | { | |
2297 | bfd_size_type amt = sizeof *p; | |
a50b1753 NC |
2298 | p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj, |
2299 | amt); | |
ec338859 | 2300 | if (p == NULL) |
c337a162 | 2301 | goto error_return; |
ec338859 AM |
2302 | p->next = *head; |
2303 | *head = p; | |
2304 | p->sec = sec; | |
2305 | p->count = 0; | |
2306 | p->pc_count = 0; | |
252b5132 | 2307 | } |
ec338859 AM |
2308 | |
2309 | p->count += 1; | |
06a6a421 L |
2310 | /* Count size relocation as PC-relative relocation. */ |
2311 | if (r_type == R_386_PC32 || size_reloc) | |
ec338859 | 2312 | p->pc_count += 1; |
252b5132 | 2313 | } |
252b5132 RH |
2314 | break; |
2315 | ||
2316 | /* This relocation describes the C++ object vtable hierarchy. | |
2317 | Reconstruct it for later use during GC. */ | |
2318 | case R_386_GNU_VTINHERIT: | |
d17e0c6e | 2319 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c337a162 | 2320 | goto error_return; |
252b5132 RH |
2321 | break; |
2322 | ||
2323 | /* This relocation describes which C++ vtable entries are actually | |
2324 | used. Record for later use during GC. */ | |
2325 | case R_386_GNU_VTENTRY: | |
c6aa130f MS |
2326 | BFD_ASSERT (h != NULL); |
2327 | if (h != NULL | |
2328 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) | |
c337a162 | 2329 | goto error_return; |
252b5132 RH |
2330 | break; |
2331 | ||
2332 | default: | |
2333 | break; | |
2334 | } | |
dd7e64d4 L |
2335 | |
2336 | if (use_plt_got | |
2337 | && h != NULL | |
2338 | && h->plt.refcount > 0 | |
8ded2ddc L |
2339 | && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
2340 | || h->got.refcount > 0) | |
dd7e64d4 L |
2341 | && htab->plt_got == NULL) |
2342 | { | |
2343 | /* Create the GOT procedure linkage table. */ | |
2344 | unsigned int plt_got_align; | |
2345 | const struct elf_backend_data *bed; | |
2346 | ||
2347 | bed = get_elf_backend_data (info->output_bfd); | |
2348 | BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8 | |
2349 | && (sizeof (elf_i386_got_plt_entry) | |
2350 | == sizeof (elf_i386_pic_got_plt_entry))); | |
2351 | plt_got_align = 3; | |
2352 | ||
2353 | if (htab->elf.dynobj == NULL) | |
2354 | htab->elf.dynobj = abfd; | |
2355 | htab->plt_got | |
2356 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
2357 | ".plt.got", | |
2358 | (bed->dynamic_sec_flags | |
2359 | | SEC_ALLOC | |
2360 | | SEC_CODE | |
2361 | | SEC_LOAD | |
2362 | | SEC_READONLY)); | |
2363 | if (htab->plt_got == NULL | |
2364 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
2365 | htab->plt_got, | |
2366 | plt_got_align)) | |
c337a162 | 2367 | goto error_return; |
dd7e64d4 | 2368 | } |
c1d11331 | 2369 | |
52bf37dd | 2370 | if (r_type == R_386_GOT32X |
c1d11331 | 2371 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
02a86693 | 2372 | sec->need_convert_load = 1; |
252b5132 RH |
2373 | } |
2374 | ||
bedfd056 L |
2375 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2376 | { | |
2377 | if (!info->keep_memory) | |
2378 | free (contents); | |
2379 | else | |
2380 | { | |
2381 | /* Cache the section contents for elf_link_input_bfd. */ | |
2382 | elf_section_data (sec)->this_hdr.contents = contents; | |
2383 | } | |
2384 | } | |
2385 | ||
b34976b6 | 2386 | return TRUE; |
c337a162 L |
2387 | |
2388 | error_return: | |
bedfd056 L |
2389 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2390 | free (contents); | |
c337a162 L |
2391 | sec->check_relocs_failed = 1; |
2392 | return FALSE; | |
252b5132 RH |
2393 | } |
2394 | ||
2395 | /* Return the section that should be marked against GC for a given | |
2396 | relocation. */ | |
2397 | ||
2398 | static asection * | |
55fd94b0 | 2399 | elf_i386_gc_mark_hook (asection *sec, |
07adf181 | 2400 | struct bfd_link_info *info, |
55fd94b0 AM |
2401 | Elf_Internal_Rela *rel, |
2402 | struct elf_link_hash_entry *h, | |
2403 | Elf_Internal_Sym *sym) | |
252b5132 RH |
2404 | { |
2405 | if (h != NULL) | |
07adf181 AM |
2406 | switch (ELF32_R_TYPE (rel->r_info)) |
2407 | { | |
2408 | case R_386_GNU_VTINHERIT: | |
2409 | case R_386_GNU_VTENTRY: | |
2410 | return NULL; | |
2411 | } | |
2412 | ||
2413 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
252b5132 RH |
2414 | } |
2415 | ||
aec6b87e L |
2416 | /* Remove undefined weak symbol from the dynamic symbol table if it |
2417 | is resolved to 0. */ | |
2418 | ||
2419 | static bfd_boolean | |
2420 | elf_i386_fixup_symbol (struct bfd_link_info *info, | |
2421 | struct elf_link_hash_entry *h) | |
2422 | { | |
2423 | if (h->dynindx != -1 | |
2424 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, | |
e62b9723 | 2425 | elf_i386_hash_entry (h)->has_got_reloc, |
aec6b87e L |
2426 | elf_i386_hash_entry (h))) |
2427 | { | |
2428 | h->dynindx = -1; | |
2429 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
2430 | h->dynstr_index); | |
2431 | } | |
2432 | return TRUE; | |
2433 | } | |
2434 | ||
252b5132 RH |
2435 | /* Adjust a symbol defined by a dynamic object and referenced by a |
2436 | regular object. The current definition is in some section of the | |
2437 | dynamic object, but we're not including those sections. We have to | |
2438 | change the definition to something the rest of the link can | |
2439 | understand. */ | |
2440 | ||
b34976b6 | 2441 | static bfd_boolean |
55fd94b0 AM |
2442 | elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info, |
2443 | struct elf_link_hash_entry *h) | |
252b5132 | 2444 | { |
6725bdbf | 2445 | struct elf_i386_link_hash_table *htab; |
252b5132 | 2446 | asection *s; |
5ca5bb35 L |
2447 | struct elf_i386_link_hash_entry *eh; |
2448 | struct elf_dyn_relocs *p; | |
252b5132 | 2449 | |
cbe950e9 L |
2450 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2451 | if (h->type == STT_GNU_IFUNC) | |
2452 | { | |
73bcf233 L |
2453 | /* All local STT_GNU_IFUNC references must be treate as local |
2454 | calls via local PLT. */ | |
5ca5bb35 L |
2455 | if (h->ref_regular |
2456 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2457 | { | |
73bcf233 | 2458 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2459 | struct elf_dyn_relocs **pp; |
2460 | ||
2461 | eh = (struct elf_i386_link_hash_entry *) h; | |
2462 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2463 | { | |
2464 | pc_count += p->pc_count; | |
2465 | p->count -= p->pc_count; | |
2466 | p->pc_count = 0; | |
73bcf233 | 2467 | count += p->count; |
5ca5bb35 L |
2468 | if (p->count == 0) |
2469 | *pp = p->next; | |
2470 | else | |
2471 | pp = &p->next; | |
2472 | } | |
2473 | ||
73bcf233 | 2474 | if (pc_count || count) |
5ca5bb35 | 2475 | { |
5ca5bb35 | 2476 | h->non_got_ref = 1; |
233cc9c1 L |
2477 | if (pc_count) |
2478 | { | |
2479 | /* Increment PLT reference count only for PC-relative | |
2480 | references. */ | |
2481 | h->needs_plt = 1; | |
2482 | if (h->plt.refcount <= 0) | |
2483 | h->plt.refcount = 1; | |
2484 | else | |
2485 | h->plt.refcount += 1; | |
2486 | } | |
5ca5bb35 L |
2487 | } |
2488 | } | |
2489 | ||
cbe950e9 L |
2490 | if (h->plt.refcount <= 0) |
2491 | { | |
2492 | h->plt.offset = (bfd_vma) -1; | |
2493 | h->needs_plt = 0; | |
2494 | } | |
2495 | return TRUE; | |
2496 | } | |
2497 | ||
252b5132 RH |
2498 | /* If this is a function, put it in the procedure linkage table. We |
2499 | will fill in the contents of the procedure linkage table later, | |
2500 | when we know the address of the .got section. */ | |
2501 | if (h->type == STT_FUNC | |
f5385ebf | 2502 | || h->needs_plt) |
252b5132 | 2503 | { |
6725bdbf | 2504 | if (h->plt.refcount <= 0 |
9c7a29a3 AM |
2505 | || SYMBOL_CALLS_LOCAL (info, h) |
2506 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2507 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
2508 | { |
2509 | /* This case can occur if we saw a PLT32 reloc in an input | |
dd5724d5 AM |
2510 | file, but the symbol was never referred to by a dynamic |
2511 | object, or if all references were garbage collected. In | |
2512 | such a case, we don't actually need to build a procedure | |
2513 | linkage table, and we can just do a PC32 reloc instead. */ | |
bbd7ec4a | 2514 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2515 | h->needs_plt = 0; |
252b5132 RH |
2516 | } |
2517 | ||
b34976b6 | 2518 | return TRUE; |
252b5132 | 2519 | } |
6725bdbf AM |
2520 | else |
2521 | /* It's possible that we incorrectly decided a .plt reloc was | |
2522 | needed for an R_386_PC32 reloc to a non-function sym in | |
2523 | check_relocs. We can't decide accurately between function and | |
2524 | non-function syms in check-relocs; Objects loaded later in | |
2525 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2526 | h->plt.offset = (bfd_vma) -1; |
252b5132 RH |
2527 | |
2528 | /* If this is a weak symbol, and there is a real definition, the | |
2529 | processor independent code will have arranged for us to see the | |
2530 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 2531 | if (h->u.weakdef != NULL) |
252b5132 | 2532 | { |
f6e332e6 AM |
2533 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2534 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2535 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2536 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
a23b6845 | 2537 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 2538 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 2539 | return TRUE; |
252b5132 RH |
2540 | } |
2541 | ||
2542 | /* This is a reference to a symbol defined by a dynamic object which | |
2543 | is not a function. */ | |
2544 | ||
2545 | /* If we are creating a shared library, we must presume that the | |
2546 | only references to the symbol are via the global offset table. | |
2547 | For such cases we need not do anything here; the relocations will | |
2548 | be handled correctly by relocate_section. */ | |
0e1862bb | 2549 | if (!bfd_link_executable (info)) |
b34976b6 | 2550 | return TRUE; |
252b5132 | 2551 | |
7843f00e | 2552 | /* If there are no references to this symbol that do not use the |
d5597ebc L |
2553 | GOT nor R_386_GOTOFF relocation, we don't need to generate a copy |
2554 | reloc. */ | |
2555 | eh = (struct elf_i386_link_hash_entry *) h; | |
2556 | if (!h->non_got_ref && !eh->gotoff_ref) | |
b34976b6 | 2557 | return TRUE; |
7843f00e | 2558 | |
8bd621d8 AM |
2559 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2560 | if (info->nocopyreloc) | |
2561 | { | |
f5385ebf | 2562 | h->non_got_ref = 0; |
b34976b6 | 2563 | return TRUE; |
8bd621d8 AM |
2564 | } |
2565 | ||
643796e3 | 2566 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
2567 | if (htab == NULL) |
2568 | return FALSE; | |
643796e3 | 2569 | |
d5597ebc L |
2570 | /* If there aren't any dynamic relocs in read-only sections nor |
2571 | R_386_GOTOFF relocation, then we can keep the dynamic relocs and | |
2572 | avoid the copy reloc. This doesn't work on VxWorks, where we can | |
2573 | not have dynamic relocations (other than copy and jump slot | |
2574 | relocations) in an executable. */ | |
23209a78 | 2575 | if (ELIMINATE_COPY_RELOCS |
d5597ebc | 2576 | && !eh->gotoff_ref |
23209a78 | 2577 | && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks) |
ebe50bae | 2578 | { |
a23b6845 AM |
2579 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2580 | { | |
2581 | s = p->sec->output_section; | |
2582 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2583 | break; | |
2584 | } | |
2585 | ||
a23b6845 AM |
2586 | if (p == NULL) |
2587 | { | |
f5385ebf | 2588 | h->non_got_ref = 0; |
a23b6845 AM |
2589 | return TRUE; |
2590 | } | |
ebe50bae AM |
2591 | } |
2592 | ||
252b5132 RH |
2593 | /* We must allocate the symbol in our .dynbss section, which will |
2594 | become part of the .bss section of the executable. There will be | |
2595 | an entry for this symbol in the .dynsym section. The dynamic | |
2596 | object will contain position independent code, so all references | |
2597 | from the dynamic object to this symbol will go through the global | |
2598 | offset table. The dynamic linker will use the .dynsym entry to | |
2599 | determine the address it must put in the global offset table, so | |
2600 | both the dynamic object and the regular object will refer to the | |
2601 | same memory location for the variable. */ | |
2602 | ||
252b5132 RH |
2603 | /* We must generate a R_386_COPY reloc to tell the dynamic linker to |
2604 | copy the initial value out of the dynamic object and into the | |
0ac8d2ca | 2605 | runtime process image. */ |
1d7e9d18 | 2606 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
252b5132 | 2607 | { |
eea6121a | 2608 | htab->srelbss->size += sizeof (Elf32_External_Rel); |
f5385ebf | 2609 | h->needs_copy = 1; |
252b5132 RH |
2610 | } |
2611 | ||
0ac8d2ca | 2612 | s = htab->sdynbss; |
252b5132 | 2613 | |
6cabe1ea | 2614 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
252b5132 RH |
2615 | } |
2616 | ||
6725bdbf | 2617 | /* Allocate space in .plt, .got and associated reloc sections for |
0c715baa | 2618 | dynamic relocs. */ |
6725bdbf | 2619 | |
b34976b6 | 2620 | static bfd_boolean |
eb4ff4d6 | 2621 | elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
6725bdbf AM |
2622 | { |
2623 | struct bfd_link_info *info; | |
2624 | struct elf_i386_link_hash_table *htab; | |
5a15f56f | 2625 | struct elf_i386_link_hash_entry *eh; |
e03a8ed8 | 2626 | struct elf_dyn_relocs *p; |
25e762b9 | 2627 | unsigned plt_entry_size; |
aec6b87e | 2628 | bfd_boolean resolved_to_zero; |
6725bdbf | 2629 | |
e92d460e | 2630 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2631 | return TRUE; |
6725bdbf | 2632 | |
cbe950e9 | 2633 | eh = (struct elf_i386_link_hash_entry *) h; |
e92d460e | 2634 | |
6725bdbf AM |
2635 | info = (struct bfd_link_info *) inf; |
2636 | htab = elf_i386_hash_table (info); | |
4dfe6ac6 NC |
2637 | if (htab == NULL) |
2638 | return FALSE; | |
6725bdbf | 2639 | |
25e762b9 RM |
2640 | plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
2641 | ||
e62b9723 L |
2642 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
2643 | eh->has_got_reloc, | |
2644 | eh); | |
aec6b87e | 2645 | |
04ebc307 L |
2646 | /* Clear the reference count of function pointer relocations if |
2647 | symbol isn't a normal function. */ | |
2648 | if (h->type != STT_FUNC) | |
2649 | eh->func_pointer_refcount = 0; | |
2650 | ||
dd7e64d4 L |
2651 | /* We can't use the GOT PLT if pointer equality is needed since |
2652 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
2653 | linker won't update the GOT slot. We will get into an infinite | |
2654 | loop at run-time. */ | |
2655 | if (htab->plt_got != NULL | |
2656 | && h->type != STT_GNU_IFUNC | |
2657 | && !h->pointer_equality_needed | |
2658 | && h->plt.refcount > 0 | |
2659 | && h->got.refcount > 0) | |
2660 | { | |
2661 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
2662 | reloctions. */ | |
2663 | h->plt.offset = (bfd_vma) -1; | |
2664 | ||
2665 | /* Use the GOT PLT. */ | |
2666 | eh->plt_got.refcount = 1; | |
2667 | } | |
2668 | ||
cbe950e9 L |
2669 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2670 | here if it is defined and referenced in a non-shared object. */ | |
2671 | if (h->type == STT_GNU_IFUNC | |
2672 | && h->def_regular) | |
25e762b9 | 2673 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs, |
2df3368d L |
2674 | &htab->readonly_dynrelocs_against_ifunc, |
2675 | plt_entry_size, | |
233cc9c1 | 2676 | plt_entry_size, 4, TRUE); |
04ebc307 L |
2677 | /* Don't create the PLT entry if there are only function pointer |
2678 | relocations which can be resolved at run-time. */ | |
cbe950e9 | 2679 | else if (htab->elf.dynamic_sections_created |
04ebc307 L |
2680 | && (h->plt.refcount > eh->func_pointer_refcount |
2681 | || eh->plt_got.refcount > 0)) | |
6725bdbf | 2682 | { |
25070364 L |
2683 | bfd_boolean use_plt_got; |
2684 | ||
04ebc307 L |
2685 | /* Clear the reference count of function pointer relocations |
2686 | if PLT is used. */ | |
2687 | eh->func_pointer_refcount = 0; | |
2688 | ||
8ded2ddc | 2689 | if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
25070364 L |
2690 | { |
2691 | /* Don't use the regular PLT for DF_BIND_NOW. */ | |
2692 | h->plt.offset = (bfd_vma) -1; | |
2693 | ||
2694 | /* Use the GOT PLT. */ | |
2695 | h->got.refcount = 1; | |
2696 | eh->plt_got.refcount = 1; | |
2697 | } | |
2698 | ||
2699 | use_plt_got = eh->plt_got.refcount > 0; | |
dd7e64d4 | 2700 | |
5a15f56f AM |
2701 | /* Make sure this symbol is output as a dynamic symbol. |
2702 | Undefined weak syms won't yet be marked as dynamic. */ | |
2703 | if (h->dynindx == -1 | |
aec6b87e L |
2704 | && !h->forced_local |
2705 | && !resolved_to_zero) | |
5a15f56f | 2706 | { |
c152c796 | 2707 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2708 | return FALSE; |
5a15f56f AM |
2709 | } |
2710 | ||
0e1862bb | 2711 | if (bfd_link_pic (info) |
4e795f50 | 2712 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
ced53ee5 | 2713 | { |
6de2ae4a | 2714 | asection *s = htab->elf.splt; |
dd7e64d4 | 2715 | asection *got_s = htab->plt_got; |
6725bdbf | 2716 | |
7c1e8d3e L |
2717 | /* If this is the first .plt entry, make room for the special |
2718 | first entry. The .plt section is used by prelink to undo | |
2719 | prelinking for dynamic relocations. */ | |
2720 | if (s->size == 0) | |
2721 | s->size = plt_entry_size; | |
2722 | ||
dd7e64d4 L |
2723 | if (use_plt_got) |
2724 | eh->plt_got.offset = got_s->size; | |
2725 | else | |
7c1e8d3e | 2726 | h->plt.offset = s->size; |
6725bdbf | 2727 | |
ced53ee5 AM |
2728 | /* If this symbol is not defined in a regular file, and we are |
2729 | not generating a shared library, then set the symbol to this | |
2730 | location in the .plt. This is required to make function | |
2731 | pointers compare as equal between the normal executable and | |
2732 | the shared library. */ | |
0e1862bb | 2733 | if (! bfd_link_pic (info) |
f5385ebf | 2734 | && !h->def_regular) |
ced53ee5 | 2735 | { |
dd7e64d4 L |
2736 | if (use_plt_got) |
2737 | { | |
2738 | /* We need to make a call to the entry of the GOT PLT | |
2739 | instead of regular PLT entry. */ | |
2740 | h->root.u.def.section = got_s; | |
2741 | h->root.u.def.value = eh->plt_got.offset; | |
2742 | } | |
2743 | else | |
2744 | { | |
2745 | h->root.u.def.section = s; | |
2746 | h->root.u.def.value = h->plt.offset; | |
2747 | } | |
ced53ee5 | 2748 | } |
6725bdbf | 2749 | |
ced53ee5 | 2750 | /* Make room for this entry. */ |
dd7e64d4 L |
2751 | if (use_plt_got) |
2752 | got_s->size += sizeof (elf_i386_got_plt_entry); | |
2753 | else | |
2754 | { | |
2755 | s->size += plt_entry_size; | |
6725bdbf | 2756 | |
dd7e64d4 L |
2757 | /* We also need to make an entry in the .got.plt section, |
2758 | which will be placed in the .got section by the linker | |
2759 | script. */ | |
2760 | htab->elf.sgotplt->size += 4; | |
6725bdbf | 2761 | |
aec6b87e L |
2762 | /* There should be no PLT relocation against resolved |
2763 | undefined weak symbol in executable. */ | |
2764 | if (!resolved_to_zero) | |
2765 | { | |
2766 | /* We also need to make an entry in the .rel.plt | |
2767 | section. */ | |
2768 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); | |
2769 | htab->elf.srelplt->reloc_count++; | |
2770 | } | |
dd7e64d4 | 2771 | } |
eac338cf | 2772 | |
23209a78 | 2773 | if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks |
0e1862bb | 2774 | && !bfd_link_pic (info)) |
eac338cf PB |
2775 | { |
2776 | /* VxWorks has a second set of relocations for each PLT entry | |
2777 | in executables. They go in a separate relocation section, | |
2778 | which is processed by the kernel loader. */ | |
2779 | ||
2780 | /* There are two relocations for the initial PLT entry: an | |
2781 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an | |
2782 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
2783 | ||
25e762b9 | 2784 | if (h->plt.offset == plt_entry_size) |
eac338cf PB |
2785 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); |
2786 | ||
2787 | /* There are two extra relocations for each subsequent PLT entry: | |
2788 | an R_386_32 relocation for the GOT entry, and an R_386_32 | |
2789 | relocation for the PLT entry. */ | |
2790 | ||
2791 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); | |
2792 | } | |
6725bdbf | 2793 | } |
ced53ee5 AM |
2794 | else |
2795 | { | |
13f42277 | 2796 | eh->plt_got.offset = (bfd_vma) -1; |
51b64d56 | 2797 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2798 | h->needs_plt = 0; |
ced53ee5 | 2799 | } |
6725bdbf AM |
2800 | } |
2801 | else | |
2802 | { | |
13f42277 | 2803 | eh->plt_got.offset = (bfd_vma) -1; |
51b64d56 | 2804 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2805 | h->needs_plt = 0; |
6725bdbf AM |
2806 | } |
2807 | ||
67a4f2b7 AO |
2808 | eh->tlsdesc_got = (bfd_vma) -1; |
2809 | ||
37e55690 | 2810 | /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary, |
13ae64f3 JJ |
2811 | make it a R_386_TLS_LE_32 requiring no TLS entry. */ |
2812 | if (h->got.refcount > 0 | |
0e1862bb | 2813 | && bfd_link_executable (info) |
13ae64f3 | 2814 | && h->dynindx == -1 |
37e55690 | 2815 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE)) |
cedb70c5 | 2816 | h->got.offset = (bfd_vma) -1; |
13ae64f3 | 2817 | else if (h->got.refcount > 0) |
6725bdbf | 2818 | { |
0ac8d2ca | 2819 | asection *s; |
b34976b6 | 2820 | bfd_boolean dyn; |
13ae64f3 | 2821 | int tls_type = elf_i386_hash_entry(h)->tls_type; |
6725bdbf | 2822 | |
5a15f56f AM |
2823 | /* Make sure this symbol is output as a dynamic symbol. |
2824 | Undefined weak syms won't yet be marked as dynamic. */ | |
2825 | if (h->dynindx == -1 | |
aec6b87e L |
2826 | && !h->forced_local |
2827 | && !resolved_to_zero) | |
5a15f56f | 2828 | { |
c152c796 | 2829 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2830 | return FALSE; |
5a15f56f AM |
2831 | } |
2832 | ||
6de2ae4a | 2833 | s = htab->elf.sgot; |
67a4f2b7 AO |
2834 | if (GOT_TLS_GDESC_P (tls_type)) |
2835 | { | |
6de2ae4a | 2836 | eh->tlsdesc_got = htab->elf.sgotplt->size |
67a4f2b7 | 2837 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 2838 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
2839 | h->got.offset = (bfd_vma) -2; |
2840 | } | |
2841 | if (! GOT_TLS_GDESC_P (tls_type) | |
2842 | || GOT_TLS_GD_P (tls_type)) | |
2843 | { | |
2844 | h->got.offset = s->size; | |
2845 | s->size += 4; | |
2846 | /* R_386_TLS_GD needs 2 consecutive GOT slots. */ | |
2847 | if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH) | |
2848 | s->size += 4; | |
2849 | } | |
ebe50bae | 2850 | dyn = htab->elf.dynamic_sections_created; |
13ae64f3 | 2851 | /* R_386_TLS_IE_32 needs one dynamic relocation, |
37e55690 JJ |
2852 | R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation, |
2853 | (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we | |
2854 | need two), R_386_TLS_GD needs one if local symbol and two if | |
aec6b87e L |
2855 | global. No dynamic relocation against resolved undefined weak |
2856 | symbol in executable. */ | |
37e55690 | 2857 | if (tls_type == GOT_TLS_IE_BOTH) |
6de2ae4a | 2858 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 | 2859 | else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
37e55690 | 2860 | || (tls_type & GOT_TLS_IE)) |
6de2ae4a | 2861 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2862 | else if (GOT_TLS_GD_P (tls_type)) |
6de2ae4a | 2863 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 | 2864 | else if (! GOT_TLS_GDESC_P (tls_type) |
aec6b87e L |
2865 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
2866 | && !resolved_to_zero) | |
67a4f2b7 | 2867 | || h->root.type != bfd_link_hash_undefweak) |
0e1862bb | 2868 | && (bfd_link_pic (info) |
ef5aade5 | 2869 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
6de2ae4a | 2870 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2871 | if (GOT_TLS_GDESC_P (tls_type)) |
6de2ae4a | 2872 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
6725bdbf AM |
2873 | } |
2874 | else | |
51b64d56 | 2875 | h->got.offset = (bfd_vma) -1; |
6725bdbf | 2876 | |
5a15f56f | 2877 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2878 | return TRUE; |
5a15f56f | 2879 | |
0c715baa AM |
2880 | /* In the shared -Bsymbolic case, discard space allocated for |
2881 | dynamic pc-relative relocs against symbols which turn out to be | |
2882 | defined in regular objects. For the normal shared case, discard | |
0ac8d2ca AM |
2883 | space for pc-relative relocs that have become local due to symbol |
2884 | visibility changes. */ | |
0c715baa | 2885 | |
0e1862bb | 2886 | if (bfd_link_pic (info)) |
5a15f56f | 2887 | { |
09695f56 AM |
2888 | /* The only reloc that uses pc_count is R_386_PC32, which will |
2889 | appear on a call or on something like ".long foo - .". We | |
2890 | want calls to protected symbols to resolve directly to the | |
2891 | function rather than going via the plt. If people want | |
2892 | function pointer comparisons to work as expected then they | |
2893 | should avoid writing assembly like ".long foo - .". */ | |
2894 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
5a15f56f | 2895 | { |
e03a8ed8 | 2896 | struct elf_dyn_relocs **pp; |
0c715baa AM |
2897 | |
2898 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2899 | { | |
c3ce498c L |
2900 | p->count -= p->pc_count; |
2901 | p->pc_count = 0; | |
0c715baa AM |
2902 | if (p->count == 0) |
2903 | *pp = p->next; | |
2904 | else | |
2905 | pp = &p->next; | |
2906 | } | |
5a15f56f | 2907 | } |
4e795f50 | 2908 | |
23209a78 | 2909 | if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks) |
3348747a | 2910 | { |
e03a8ed8 | 2911 | struct elf_dyn_relocs **pp; |
3348747a NS |
2912 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
2913 | { | |
2914 | if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) | |
2915 | *pp = p->next; | |
2916 | else | |
2917 | pp = &p->next; | |
2918 | } | |
2919 | } | |
2920 | ||
4e795f50 | 2921 | /* Also discard relocs on undefined weak syms with non-default |
aec6b87e | 2922 | visibility or in PIE. */ |
22d606e9 | 2923 | if (eh->dyn_relocs != NULL |
c353e543 | 2924 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 | 2925 | { |
aec6b87e L |
2926 | /* Undefined weak symbol is never bound locally in shared |
2927 | library. */ | |
2928 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2929 | || resolved_to_zero) | |
2930 | { | |
2931 | if (h->non_got_ref) | |
2932 | { | |
2933 | /* Keep dynamic non-GOT/non-PLT relocation so that we | |
2934 | can branch to 0 without PLT. */ | |
2935 | struct elf_dyn_relocs **pp; | |
2936 | ||
2937 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2938 | if (p->pc_count == 0) | |
2939 | *pp = p->next; | |
2940 | else | |
2941 | { | |
2942 | /* Remove non-R_386_PC32 relocation. */ | |
2943 | p->count = p->pc_count; | |
2944 | pp = &p->next; | |
2945 | } | |
22d606e9 | 2946 | |
aec6b87e L |
2947 | if (eh->dyn_relocs != NULL) |
2948 | { | |
2949 | /* Make sure undefined weak symbols are output | |
2950 | as dynamic symbols in PIEs for dynamic non-GOT | |
2951 | non-PLT reloations. */ | |
2952 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2953 | return FALSE; | |
2954 | } | |
2955 | } | |
2956 | else | |
2957 | eh->dyn_relocs = NULL; | |
2958 | } | |
22d606e9 AM |
2959 | else if (h->dynindx == -1 |
2960 | && !h->forced_local) | |
2961 | { | |
2962 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2963 | return FALSE; | |
2964 | } | |
2965 | } | |
0c715baa | 2966 | } |
a23b6845 | 2967 | else if (ELIMINATE_COPY_RELOCS) |
0c715baa AM |
2968 | { |
2969 | /* For the non-shared case, discard space for relocs against | |
2970 | symbols which turn out to need copy relocs or are not | |
04ebc307 L |
2971 | dynamic. Keep dynamic relocations for run-time function |
2972 | pointer initialization. */ | |
0c715baa | 2973 | |
aec6b87e L |
2974 | if ((!h->non_got_ref |
2975 | || eh->func_pointer_refcount > 0 | |
2976 | || (h->root.type == bfd_link_hash_undefweak | |
2977 | && !resolved_to_zero)) | |
f5385ebf AM |
2978 | && ((h->def_dynamic |
2979 | && !h->def_regular) | |
ebe50bae | 2980 | || (htab->elf.dynamic_sections_created |
0c715baa AM |
2981 | && (h->root.type == bfd_link_hash_undefweak |
2982 | || h->root.type == bfd_link_hash_undefined)))) | |
2983 | { | |
2984 | /* Make sure this symbol is output as a dynamic symbol. | |
2985 | Undefined weak syms won't yet be marked as dynamic. */ | |
2986 | if (h->dynindx == -1 | |
aec6b87e L |
2987 | && !h->forced_local |
2988 | && !resolved_to_zero) | |
0c715baa | 2989 | { |
c152c796 | 2990 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2991 | return FALSE; |
0c715baa | 2992 | } |
5a15f56f | 2993 | |
0c715baa AM |
2994 | /* If that succeeded, we know we'll be keeping all the |
2995 | relocs. */ | |
2996 | if (h->dynindx != -1) | |
2997 | goto keep; | |
2998 | } | |
2999 | ||
3000 | eh->dyn_relocs = NULL; | |
04ebc307 | 3001 | eh->func_pointer_refcount = 0; |
0c715baa | 3002 | |
ec338859 | 3003 | keep: ; |
5a15f56f AM |
3004 | } |
3005 | ||
0c715baa AM |
3006 | /* Finally, allocate space. */ |
3007 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
12d0ee4a | 3008 | { |
e7c33416 NC |
3009 | asection *sreloc; |
3010 | ||
cbe950e9 | 3011 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
3012 | |
3013 | BFD_ASSERT (sreloc != NULL); | |
eea6121a | 3014 | sreloc->size += p->count * sizeof (Elf32_External_Rel); |
12d0ee4a AM |
3015 | } |
3016 | ||
b34976b6 | 3017 | return TRUE; |
6725bdbf AM |
3018 | } |
3019 | ||
c25bc9fc L |
3020 | /* Allocate space in .plt, .got and associated reloc sections for |
3021 | local dynamic relocs. */ | |
3022 | ||
3023 | static bfd_boolean | |
3024 | elf_i386_allocate_local_dynrelocs (void **slot, void *inf) | |
3025 | { | |
3026 | struct elf_link_hash_entry *h | |
3027 | = (struct elf_link_hash_entry *) *slot; | |
3028 | ||
3029 | if (h->type != STT_GNU_IFUNC | |
3030 | || !h->def_regular | |
3031 | || !h->ref_regular | |
3032 | || !h->forced_local | |
3033 | || h->root.type != bfd_link_hash_defined) | |
3034 | abort (); | |
3035 | ||
3036 | return elf_i386_allocate_dynrelocs (h, inf); | |
3037 | } | |
3038 | ||
0c715baa AM |
3039 | /* Find any dynamic relocs that apply to read-only sections. */ |
3040 | ||
b34976b6 | 3041 | static bfd_boolean |
eb4ff4d6 | 3042 | elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
0c715baa AM |
3043 | { |
3044 | struct elf_i386_link_hash_entry *eh; | |
e03a8ed8 | 3045 | struct elf_dyn_relocs *p; |
0c715baa | 3046 | |
aa715242 L |
3047 | /* Skip local IFUNC symbols. */ |
3048 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
3049 | return TRUE; | |
3050 | ||
0c715baa AM |
3051 | eh = (struct elf_i386_link_hash_entry *) h; |
3052 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
3053 | { | |
3054 | asection *s = p->sec->output_section; | |
3055 | ||
3056 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
3057 | { | |
3058 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
3059 | ||
3060 | info->flags |= DF_TEXTREL; | |
3061 | ||
0e1862bb | 3062 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd L |
3063 | || info->error_textrel) |
3064 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"), | |
b70321a2 L |
3065 | p->sec->owner, h->root.root.string, |
3066 | p->sec); | |
3067 | ||
0c715baa | 3068 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 3069 | return FALSE; |
0c715baa AM |
3070 | } |
3071 | } | |
b34976b6 | 3072 | return TRUE; |
0c715baa AM |
3073 | } |
3074 | ||
c175a657 | 3075 | /* Convert load via the GOT slot to load immediate. */ |
daa67607 L |
3076 | |
3077 | static bfd_boolean | |
02a86693 | 3078 | elf_i386_convert_load (bfd *abfd, asection *sec, |
a6af384b | 3079 | struct bfd_link_info *link_info) |
daa67607 | 3080 | { |
c175a657 | 3081 | struct elf_i386_link_hash_table *htab; |
daa67607 L |
3082 | Elf_Internal_Shdr *symtab_hdr; |
3083 | Elf_Internal_Rela *internal_relocs; | |
3084 | Elf_Internal_Rela *irel, *irelend; | |
3085 | bfd_byte *contents; | |
c175a657 | 3086 | bfd_boolean changed; |
daa67607 L |
3087 | bfd_signed_vma *local_got_refcounts; |
3088 | ||
3089 | /* Don't even try to convert non-ELF outputs. */ | |
3090 | if (!is_elf_hash_table (link_info->hash)) | |
3091 | return FALSE; | |
3092 | ||
c1d11331 | 3093 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 3094 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
02a86693 | 3095 | || sec->need_convert_load == 0 |
c8831961 | 3096 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
3097 | return TRUE; |
3098 | ||
3099 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3100 | ||
3101 | /* Load the relocations for this section. */ | |
3102 | internal_relocs = (_bfd_elf_link_read_relocs | |
3103 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
3104 | link_info->keep_memory)); | |
3105 | if (internal_relocs == NULL) | |
3106 | return FALSE; | |
3107 | ||
c175a657 | 3108 | changed = FALSE; |
daa67607 | 3109 | htab = elf_i386_hash_table (link_info); |
daa67607 L |
3110 | local_got_refcounts = elf_local_got_refcounts (abfd); |
3111 | ||
3112 | /* Get the section contents. */ | |
3113 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
3114 | contents = elf_section_data (sec)->this_hdr.contents; | |
3115 | else | |
3116 | { | |
3117 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
3118 | goto error_return; | |
3119 | } | |
3120 | ||
3121 | irelend = internal_relocs + sec->reloc_count; | |
3122 | for (irel = internal_relocs; irel < irelend; irel++) | |
3123 | { | |
3124 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
c175a657 | 3125 | unsigned int r_symndx; |
daa67607 | 3126 | struct elf_link_hash_entry *h; |
c175a657 | 3127 | bfd_boolean converted; |
daa67607 | 3128 | |
7d4d9709 L |
3129 | /* Don't convert R_386_GOT32 since we can't tell if it is applied |
3130 | to "mov $foo@GOT, %reg" which isn't a load via GOT. */ | |
3131 | if (r_type != R_386_GOT32X) | |
daa67607 L |
3132 | continue; |
3133 | ||
c175a657 | 3134 | r_symndx = ELF32_R_SYM (irel->r_info); |
02a86693 | 3135 | if (r_symndx < symtab_hdr->sh_info) |
c175a657 L |
3136 | h = elf_i386_get_local_sym_hash (htab, sec->owner, |
3137 | (const Elf_Internal_Rela *) irel, | |
3138 | FALSE); | |
3139 | else | |
02a86693 | 3140 | { |
c175a657 L |
3141 | h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info]; |
3142 | while (h->root.type == bfd_link_hash_indirect | |
3143 | || h->root.type == bfd_link_hash_warning) | |
3144 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
daa67607 L |
3145 | } |
3146 | ||
02a86693 | 3147 | /* STT_GNU_IFUNC must keep GOT32 relocations. */ |
c175a657 | 3148 | if (h != NULL && h->type == STT_GNU_IFUNC) |
02a86693 L |
3149 | continue; |
3150 | ||
c175a657 L |
3151 | converted = FALSE; |
3152 | if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents, | |
3153 | irel, h, &converted, link_info)) | |
3154 | goto error_return; | |
bae420ef | 3155 | |
c175a657 | 3156 | if (converted) |
02a86693 | 3157 | { |
c175a657 L |
3158 | changed = converted; |
3159 | if (h) | |
02a86693 | 3160 | { |
c175a657 L |
3161 | if (h->got.refcount > 0) |
3162 | h->got.refcount -= 1; | |
02a86693 | 3163 | } |
c175a657 | 3164 | else |
02a86693 | 3165 | { |
c175a657 L |
3166 | if (local_got_refcounts != NULL |
3167 | && local_got_refcounts[r_symndx] > 0) | |
3168 | local_got_refcounts[r_symndx] -= 1; | |
02a86693 | 3169 | } |
daa67607 L |
3170 | } |
3171 | } | |
3172 | ||
3173 | if (contents != NULL | |
3174 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3175 | { | |
c175a657 | 3176 | if (!changed && !link_info->keep_memory) |
daa67607 L |
3177 | free (contents); |
3178 | else | |
3179 | { | |
3180 | /* Cache the section contents for elf_link_input_bfd. */ | |
3181 | elf_section_data (sec)->this_hdr.contents = contents; | |
3182 | } | |
3183 | } | |
3184 | ||
3185 | if (elf_section_data (sec)->relocs != internal_relocs) | |
3186 | { | |
c175a657 | 3187 | if (!changed) |
daa67607 L |
3188 | free (internal_relocs); |
3189 | else | |
3190 | elf_section_data (sec)->relocs = internal_relocs; | |
3191 | } | |
3192 | ||
3193 | return TRUE; | |
3194 | ||
3195 | error_return: | |
3196 | if (contents != NULL | |
3197 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3198 | free (contents); | |
3199 | if (internal_relocs != NULL | |
3200 | && elf_section_data (sec)->relocs != internal_relocs) | |
3201 | free (internal_relocs); | |
3202 | return FALSE; | |
3203 | } | |
3204 | ||
252b5132 RH |
3205 | /* Set the sizes of the dynamic sections. */ |
3206 | ||
b34976b6 | 3207 | static bfd_boolean |
23209a78 | 3208 | elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
252b5132 | 3209 | { |
6725bdbf | 3210 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
3211 | bfd *dynobj; |
3212 | asection *s; | |
b34976b6 | 3213 | bfd_boolean relocs; |
0c715baa | 3214 | bfd *ibfd; |
252b5132 | 3215 | |
6725bdbf | 3216 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
3217 | if (htab == NULL) |
3218 | return FALSE; | |
ebe50bae | 3219 | dynobj = htab->elf.dynobj; |
ffb2e45b AM |
3220 | if (dynobj == NULL) |
3221 | abort (); | |
252b5132 | 3222 | |
0c715baa AM |
3223 | /* Set up .got offsets for local syms, and space for local dynamic |
3224 | relocs. */ | |
c72f2fb2 | 3225 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
161d71a6 L |
3226 | { |
3227 | bfd_signed_vma *local_got; | |
3228 | bfd_signed_vma *end_local_got; | |
13ae64f3 | 3229 | char *local_tls_type; |
67a4f2b7 | 3230 | bfd_vma *local_tlsdesc_gotent; |
161d71a6 L |
3231 | bfd_size_type locsymcount; |
3232 | Elf_Internal_Shdr *symtab_hdr; | |
3233 | asection *srel; | |
6725bdbf | 3234 | |
0ffa91dd | 3235 | if (! is_i386_elf (ibfd)) |
161d71a6 | 3236 | continue; |
6725bdbf | 3237 | |
0c715baa AM |
3238 | for (s = ibfd->sections; s != NULL; s = s->next) |
3239 | { | |
e03a8ed8 | 3240 | struct elf_dyn_relocs *p; |
0c715baa | 3241 | |
02a86693 | 3242 | if (!elf_i386_convert_load (ibfd, s, info)) |
daa67607 L |
3243 | return FALSE; |
3244 | ||
e03a8ed8 | 3245 | for (p = ((struct elf_dyn_relocs *) |
e81d3500 | 3246 | elf_section_data (s)->local_dynrel); |
ec338859 AM |
3247 | p != NULL; |
3248 | p = p->next) | |
0c715baa | 3249 | { |
ec338859 AM |
3250 | if (!bfd_is_abs_section (p->sec) |
3251 | && bfd_is_abs_section (p->sec->output_section)) | |
3252 | { | |
3253 | /* Input section has been discarded, either because | |
3254 | it is a copy of a linkonce section or due to | |
3255 | linker script /DISCARD/, so we'll be discarding | |
3256 | the relocs too. */ | |
3257 | } | |
23209a78 | 3258 | else if (get_elf_i386_backend_data (output_bfd)->is_vxworks |
3348747a NS |
3259 | && strcmp (p->sec->output_section->name, |
3260 | ".tls_vars") == 0) | |
3261 | { | |
3262 | /* Relocations in vxworks .tls_vars sections are | |
3263 | handled specially by the loader. */ | |
3264 | } | |
248866a8 | 3265 | else if (p->count != 0) |
ec338859 AM |
3266 | { |
3267 | srel = elf_section_data (p->sec)->sreloc; | |
eea6121a | 3268 | srel->size += p->count * sizeof (Elf32_External_Rel); |
4b819e1f L |
3269 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
3270 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
3271 | { |
3272 | info->flags |= DF_TEXTREL; | |
0e1862bb | 3273 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd L |
3274 | || info->error_textrel) |
3275 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), | |
b70321a2 | 3276 | p->sec->owner, p->sec); |
b70321a2 | 3277 | } |
ec338859 | 3278 | } |
0c715baa AM |
3279 | } |
3280 | } | |
3281 | ||
3282 | local_got = elf_local_got_refcounts (ibfd); | |
161d71a6 L |
3283 | if (!local_got) |
3284 | continue; | |
6725bdbf | 3285 | |
0ffa91dd | 3286 | symtab_hdr = &elf_symtab_hdr (ibfd); |
161d71a6 L |
3287 | locsymcount = symtab_hdr->sh_info; |
3288 | end_local_got = local_got + locsymcount; | |
13ae64f3 | 3289 | local_tls_type = elf_i386_local_got_tls_type (ibfd); |
67a4f2b7 | 3290 | local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd); |
6de2ae4a L |
3291 | s = htab->elf.sgot; |
3292 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
3293 | for (; local_got < end_local_got; |
3294 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
161d71a6 | 3295 | { |
67a4f2b7 | 3296 | *local_tlsdesc_gotent = (bfd_vma) -1; |
161d71a6 | 3297 | if (*local_got > 0) |
6725bdbf | 3298 | { |
67a4f2b7 AO |
3299 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
3300 | { | |
6de2ae4a | 3301 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
67a4f2b7 | 3302 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 3303 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
3304 | *local_got = (bfd_vma) -2; |
3305 | } | |
3306 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3307 | || GOT_TLS_GD_P (*local_tls_type)) | |
3308 | { | |
3309 | *local_got = s->size; | |
3310 | s->size += 4; | |
3311 | if (GOT_TLS_GD_P (*local_tls_type) | |
3312 | || *local_tls_type == GOT_TLS_IE_BOTH) | |
3313 | s->size += 4; | |
3314 | } | |
0e1862bb | 3315 | if (bfd_link_pic (info) |
67a4f2b7 | 3316 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
37e55690 JJ |
3317 | || (*local_tls_type & GOT_TLS_IE)) |
3318 | { | |
3319 | if (*local_tls_type == GOT_TLS_IE_BOTH) | |
eea6121a | 3320 | srel->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
3321 | else if (GOT_TLS_GD_P (*local_tls_type) |
3322 | || ! GOT_TLS_GDESC_P (*local_tls_type)) | |
eea6121a | 3323 | srel->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 3324 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
6de2ae4a | 3325 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
37e55690 | 3326 | } |
6725bdbf | 3327 | } |
161d71a6 L |
3328 | else |
3329 | *local_got = (bfd_vma) -1; | |
6725bdbf | 3330 | } |
252b5132 | 3331 | } |
6725bdbf | 3332 | |
13ae64f3 JJ |
3333 | if (htab->tls_ldm_got.refcount > 0) |
3334 | { | |
3335 | /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM | |
3336 | relocs. */ | |
6de2ae4a L |
3337 | htab->tls_ldm_got.offset = htab->elf.sgot->size; |
3338 | htab->elf.sgot->size += 8; | |
3339 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); | |
13ae64f3 JJ |
3340 | } |
3341 | else | |
3342 | htab->tls_ldm_got.offset = -1; | |
3343 | ||
0c715baa AM |
3344 | /* Allocate global sym .plt and .got entries, and space for global |
3345 | sym dynamic relocs. */ | |
eb4ff4d6 | 3346 | elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info); |
252b5132 | 3347 | |
c25bc9fc L |
3348 | /* Allocate .plt and .got entries, and space for local symbols. */ |
3349 | htab_traverse (htab->loc_hash_table, | |
3350 | elf_i386_allocate_local_dynrelocs, | |
3351 | info); | |
3352 | ||
67a4f2b7 AO |
3353 | /* For every jump slot reserved in the sgotplt, reloc_count is |
3354 | incremented. However, when we reserve space for TLS descriptors, | |
3355 | it's not incremented, so in order to compute the space reserved | |
3356 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 | 3357 | slot size. |
caa0075c | 3358 | |
e1f98742 L |
3359 | PR ld/13302: We start next_irelative_index at the end of .rela.plt |
3360 | so that R_386_IRELATIVE entries come last. */ | |
6de2ae4a | 3361 | if (htab->elf.srelplt) |
e1f98742 L |
3362 | { |
3363 | htab->next_tls_desc_index = htab->elf.srelplt->reloc_count; | |
3364 | htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4; | |
3365 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
3366 | } | |
3367 | else if (htab->elf.irelplt) | |
3368 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
3369 | ||
67a4f2b7 | 3370 | |
a7b16ceb L |
3371 | if (htab->elf.sgotplt) |
3372 | { | |
3373 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
9a2a56cc | 3374 | entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
3375 | if ((htab->elf.hgot == NULL |
3376 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
3377 | && (htab->elf.sgotplt->size |
3378 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
3379 | && (htab->elf.splt == NULL |
3380 | || htab->elf.splt->size == 0) | |
3381 | && (htab->elf.sgot == NULL | |
3382 | || htab->elf.sgot->size == 0) | |
3383 | && (htab->elf.iplt == NULL | |
3384 | || htab->elf.iplt->size == 0) | |
3385 | && (htab->elf.igotplt == NULL | |
3386 | || htab->elf.igotplt->size == 0)) | |
3387 | htab->elf.sgotplt->size = 0; | |
3388 | } | |
3389 | ||
9a2a56cc AM |
3390 | |
3391 | if (htab->plt_eh_frame != NULL | |
3392 | && htab->elf.splt != NULL | |
3393 | && htab->elf.splt->size != 0 | |
3394 | && !bfd_is_abs_section (htab->elf.splt->output_section) | |
3395 | && _bfd_elf_eh_frame_present (info)) | |
3396 | htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt); | |
3397 | ||
5a15f56f AM |
3398 | /* We now have determined the sizes of the various dynamic sections. |
3399 | Allocate memory for them. */ | |
b34976b6 | 3400 | relocs = FALSE; |
252b5132 RH |
3401 | for (s = dynobj->sections; s != NULL; s = s->next) |
3402 | { | |
eac338cf PB |
3403 | bfd_boolean strip_section = TRUE; |
3404 | ||
252b5132 RH |
3405 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
3406 | continue; | |
3407 | ||
6de2ae4a | 3408 | if (s == htab->elf.splt |
9a2a56cc | 3409 | || s == htab->elf.sgot) |
252b5132 | 3410 | { |
6725bdbf AM |
3411 | /* Strip this section if we don't need it; see the |
3412 | comment below. */ | |
eac338cf PB |
3413 | /* We'd like to strip these sections if they aren't needed, but if |
3414 | we've exported dynamic symbols from them we must leave them. | |
3415 | It's too late to tell BFD to get rid of the symbols. */ | |
3416 | ||
7325306f | 3417 | if (htab->elf.hplt != NULL) |
eac338cf | 3418 | strip_section = FALSE; |
252b5132 | 3419 | } |
9a2a56cc AM |
3420 | else if (s == htab->elf.sgotplt |
3421 | || s == htab->elf.iplt | |
3422 | || s == htab->elf.igotplt | |
dd7e64d4 | 3423 | || s == htab->plt_got |
9a2a56cc AM |
3424 | || s == htab->plt_eh_frame |
3425 | || s == htab->sdynbss) | |
3426 | { | |
3427 | /* Strip these too. */ | |
3428 | } | |
0112cd26 | 3429 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel")) |
252b5132 | 3430 | { |
6de2ae4a L |
3431 | if (s->size != 0 |
3432 | && s != htab->elf.srelplt | |
3433 | && s != htab->srelplt2) | |
b34976b6 | 3434 | relocs = TRUE; |
252b5132 | 3435 | |
0ac8d2ca AM |
3436 | /* We use the reloc_count field as a counter if we need |
3437 | to copy relocs into the output file. */ | |
5ae0bfb6 | 3438 | s->reloc_count = 0; |
252b5132 | 3439 | } |
6725bdbf | 3440 | else |
252b5132 RH |
3441 | { |
3442 | /* It's not one of our sections, so don't allocate space. */ | |
3443 | continue; | |
3444 | } | |
3445 | ||
c456f082 | 3446 | if (s->size == 0) |
252b5132 | 3447 | { |
0ac8d2ca AM |
3448 | /* If we don't need this section, strip it from the |
3449 | output file. This is mostly to handle .rel.bss and | |
3450 | .rel.plt. We must create both sections in | |
3451 | create_dynamic_sections, because they must be created | |
3452 | before the linker maps input sections to output | |
3453 | sections. The linker does that before | |
3454 | adjust_dynamic_symbol is called, and it is that | |
3455 | function which decides whether anything needs to go | |
3456 | into these sections. */ | |
c456f082 AM |
3457 | if (strip_section) |
3458 | s->flags |= SEC_EXCLUDE; | |
252b5132 RH |
3459 | continue; |
3460 | } | |
3461 | ||
c456f082 AM |
3462 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3463 | continue; | |
3464 | ||
f69da49f AM |
3465 | /* Allocate memory for the section contents. We use bfd_zalloc |
3466 | here in case unused entries are not reclaimed before the | |
3467 | section's contents are written out. This should not happen, | |
3468 | but this way if it does, we get a R_386_NONE reloc instead | |
3469 | of garbage. */ | |
a50b1753 | 3470 | s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size); |
6725bdbf | 3471 | if (s->contents == NULL) |
b34976b6 | 3472 | return FALSE; |
252b5132 RH |
3473 | } |
3474 | ||
e41b3a13 | 3475 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3476 | && htab->plt_eh_frame->contents != NULL) |
3477 | { | |
3478 | memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt, | |
3479 | sizeof (elf_i386_eh_frame_plt)); | |
3480 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
3481 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
3482 | } | |
e41b3a13 | 3483 | |
ebe50bae | 3484 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
3485 | { |
3486 | /* Add some entries to the .dynamic section. We fill in the | |
3487 | values later, in elf_i386_finish_dynamic_sections, but we | |
3488 | must add the entries now so that we get the correct size for | |
3489 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
3490 | dynamic linker and used by the debugger. */ | |
dc810e39 | 3491 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3492 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3493 | |
0e1862bb | 3494 | if (bfd_link_executable (info)) |
252b5132 | 3495 | { |
dc810e39 | 3496 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3497 | return FALSE; |
252b5132 RH |
3498 | } |
3499 | ||
6de2ae4a | 3500 | if (htab->elf.splt->size != 0) |
252b5132 | 3501 | { |
7c1e8d3e L |
3502 | /* DT_PLTGOT is used by prelink even if there is no PLT |
3503 | relocation. */ | |
3504 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
b34976b6 | 3505 | return FALSE; |
7c1e8d3e L |
3506 | |
3507 | if (htab->elf.srelplt->size != 0) | |
3508 | { | |
3509 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
3510 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
3511 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
3512 | return FALSE; | |
3513 | } | |
252b5132 RH |
3514 | } |
3515 | ||
3516 | if (relocs) | |
3517 | { | |
dc810e39 AM |
3518 | if (!add_dynamic_entry (DT_REL, 0) |
3519 | || !add_dynamic_entry (DT_RELSZ, 0) | |
3520 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
b34976b6 | 3521 | return FALSE; |
252b5132 | 3522 | |
0c715baa AM |
3523 | /* If any dynamic relocs apply to a read-only section, |
3524 | then we need a DT_TEXTREL entry. */ | |
248866a8 | 3525 | if ((info->flags & DF_TEXTREL) == 0) |
eb4ff4d6 L |
3526 | elf_link_hash_traverse (&htab->elf, |
3527 | elf_i386_readonly_dynrelocs, info); | |
0c715baa AM |
3528 | |
3529 | if ((info->flags & DF_TEXTREL) != 0) | |
3530 | { | |
2df3368d | 3531 | if (htab->readonly_dynrelocs_against_ifunc) |
8efa2874 L |
3532 | { |
3533 | info->callbacks->einfo | |
3534 | (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n")); | |
3535 | bfd_set_error (bfd_error_bad_value); | |
3536 | return FALSE; | |
3537 | } | |
3538 | ||
0c715baa | 3539 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 3540 | return FALSE; |
0c715baa | 3541 | } |
252b5132 | 3542 | } |
23209a78 | 3543 | if (get_elf_i386_backend_data (output_bfd)->is_vxworks |
7a2b07ff NS |
3544 | && !elf_vxworks_add_dynamic_entries (output_bfd, info)) |
3545 | return FALSE; | |
252b5132 | 3546 | } |
dc810e39 | 3547 | #undef add_dynamic_entry |
252b5132 | 3548 | |
b34976b6 | 3549 | return TRUE; |
252b5132 RH |
3550 | } |
3551 | ||
67a4f2b7 AO |
3552 | static bfd_boolean |
3553 | elf_i386_always_size_sections (bfd *output_bfd, | |
3554 | struct bfd_link_info *info) | |
3555 | { | |
3556 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3557 | ||
3558 | if (tls_sec) | |
3559 | { | |
3560 | struct elf_link_hash_entry *tlsbase; | |
3561 | ||
3562 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3563 | "_TLS_MODULE_BASE_", | |
3564 | FALSE, FALSE, FALSE); | |
3565 | ||
3566 | if (tlsbase && tlsbase->type == STT_TLS) | |
3567 | { | |
4dfe6ac6 | 3568 | struct elf_i386_link_hash_table *htab; |
67a4f2b7 AO |
3569 | struct bfd_link_hash_entry *bh = NULL; |
3570 | const struct elf_backend_data *bed | |
3571 | = get_elf_backend_data (output_bfd); | |
3572 | ||
4dfe6ac6 NC |
3573 | htab = elf_i386_hash_table (info); |
3574 | if (htab == NULL) | |
3575 | return FALSE; | |
3576 | ||
67a4f2b7 AO |
3577 | if (!(_bfd_generic_link_add_one_symbol |
3578 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3579 | tls_sec, 0, NULL, FALSE, | |
3580 | bed->collect, &bh))) | |
3581 | return FALSE; | |
9f03412a | 3582 | |
4dfe6ac6 | 3583 | htab->tls_module_base = bh; |
9f03412a | 3584 | |
67a4f2b7 AO |
3585 | tlsbase = (struct elf_link_hash_entry *)bh; |
3586 | tlsbase->def_regular = 1; | |
3587 | tlsbase->other = STV_HIDDEN; | |
576fa883 | 3588 | tlsbase->root.linker_def = 1; |
67a4f2b7 AO |
3589 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
3590 | } | |
3591 | } | |
3592 | ||
3593 | return TRUE; | |
3594 | } | |
3595 | ||
38701953 AM |
3596 | /* Set the correct type for an x86 ELF section. We do this by the |
3597 | section name, which is a hack, but ought to work. */ | |
3598 | ||
b34976b6 | 3599 | static bfd_boolean |
55fd94b0 AM |
3600 | elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
3601 | Elf_Internal_Shdr *hdr, | |
3602 | asection *sec) | |
38701953 | 3603 | { |
91d6fa6a | 3604 | const char *name; |
38701953 AM |
3605 | |
3606 | name = bfd_get_section_name (abfd, sec); | |
3607 | ||
3608 | /* This is an ugly, but unfortunately necessary hack that is | |
3609 | needed when producing EFI binaries on x86. It tells | |
3610 | elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
3611 | containing ELF relocation info. We need this hack in order to | |
3612 | be able to generate ELF binaries that can be translated into | |
3613 | EFI applications (which are essentially COFF objects). Those | |
3614 | files contain a COFF ".reloc" section inside an ELFNN object, | |
3615 | which would normally cause BFD to segfault because it would | |
3616 | attempt to interpret this section as containing relocation | |
3617 | entries for section "oc". With this hack enabled, ".reloc" | |
3618 | will be treated as a normal data section, which will avoid the | |
3619 | segfault. However, you won't be able to create an ELFNN binary | |
3620 | with a section named "oc" that needs relocations, but that's | |
3621 | the kind of ugly side-effects you get when detecting section | |
3622 | types based on their names... In practice, this limitation is | |
3623 | unlikely to bite. */ | |
3624 | if (strcmp (name, ".reloc") == 0) | |
3625 | hdr->sh_type = SHT_PROGBITS; | |
3626 | ||
b34976b6 | 3627 | return TRUE; |
38701953 AM |
3628 | } |
3629 | ||
9f03412a AO |
3630 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
3631 | executables. Rather than setting it to the beginning of the TLS | |
3632 | section, we have to set it to the end. This function may be called | |
3633 | multiple times, it is idempotent. */ | |
3634 | ||
3635 | static void | |
eb4ff4d6 | 3636 | elf_i386_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 3637 | { |
4dfe6ac6 | 3638 | struct elf_i386_link_hash_table *htab; |
9f03412a AO |
3639 | struct bfd_link_hash_entry *base; |
3640 | ||
0e1862bb | 3641 | if (!bfd_link_executable (info)) |
9f03412a AO |
3642 | return; |
3643 | ||
4dfe6ac6 NC |
3644 | htab = elf_i386_hash_table (info); |
3645 | if (htab == NULL) | |
3646 | return; | |
9f03412a | 3647 | |
4dfe6ac6 NC |
3648 | base = htab->tls_module_base; |
3649 | if (base == NULL) | |
9f03412a AO |
3650 | return; |
3651 | ||
4dfe6ac6 | 3652 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
3653 | } |
3654 | ||
13ae64f3 JJ |
3655 | /* Return the base VMA address which should be subtracted from real addresses |
3656 | when resolving @dtpoff relocation. | |
3657 | This is PT_TLS segment p_vaddr. */ | |
3658 | ||
3659 | static bfd_vma | |
eb4ff4d6 | 3660 | elf_i386_dtpoff_base (struct bfd_link_info *info) |
13ae64f3 | 3661 | { |
e1918d23 AM |
3662 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3663 | if (elf_hash_table (info)->tls_sec == NULL) | |
6a30718d | 3664 | return 0; |
e1918d23 | 3665 | return elf_hash_table (info)->tls_sec->vma; |
13ae64f3 JJ |
3666 | } |
3667 | ||
3668 | /* Return the relocation value for @tpoff relocation | |
3669 | if STT_TLS virtual address is ADDRESS. */ | |
3670 | ||
3671 | static bfd_vma | |
eb4ff4d6 | 3672 | elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address) |
13ae64f3 | 3673 | { |
e1918d23 | 3674 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3675 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3676 | bfd_vma static_tls_size; | |
13ae64f3 | 3677 | |
e1918d23 AM |
3678 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3679 | if (htab->tls_sec == NULL) | |
6a30718d | 3680 | return 0; |
7dc98aea RO |
3681 | |
3682 | /* Consider special static TLS alignment requirements. */ | |
3683 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3684 | return static_tls_size + htab->tls_sec->vma - address; | |
13ae64f3 JJ |
3685 | } |
3686 | ||
252b5132 RH |
3687 | /* Relocate an i386 ELF section. */ |
3688 | ||
b34976b6 | 3689 | static bfd_boolean |
55fd94b0 AM |
3690 | elf_i386_relocate_section (bfd *output_bfd, |
3691 | struct bfd_link_info *info, | |
3692 | bfd *input_bfd, | |
3693 | asection *input_section, | |
3694 | bfd_byte *contents, | |
3695 | Elf_Internal_Rela *relocs, | |
3696 | Elf_Internal_Sym *local_syms, | |
3697 | asection **local_sections) | |
252b5132 | 3698 | { |
6725bdbf | 3699 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
3700 | Elf_Internal_Shdr *symtab_hdr; |
3701 | struct elf_link_hash_entry **sym_hashes; | |
3702 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3703 | bfd_vma *local_tlsdesc_gotents; |
252b5132 | 3704 | Elf_Internal_Rela *rel; |
60f2e42e | 3705 | Elf_Internal_Rela *wrel; |
252b5132 | 3706 | Elf_Internal_Rela *relend; |
3348747a | 3707 | bfd_boolean is_vxworks_tls; |
25e762b9 | 3708 | unsigned plt_entry_size; |
252b5132 | 3709 | |
0ffa91dd | 3710 | BFD_ASSERT (is_i386_elf (input_bfd)); |
6bbec505 | 3711 | |
c337a162 L |
3712 | /* Skip if check_relocs failed. */ |
3713 | if (input_section->check_relocs_failed) | |
3714 | return FALSE; | |
3715 | ||
6725bdbf | 3716 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
3717 | if (htab == NULL) |
3718 | return FALSE; | |
0ffa91dd | 3719 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
252b5132 RH |
3720 | sym_hashes = elf_sym_hashes (input_bfd); |
3721 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
67a4f2b7 | 3722 | local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd); |
3348747a NS |
3723 | /* We have to handle relocations in vxworks .tls_vars sections |
3724 | specially, because the dynamic loader is 'weird'. */ | |
23209a78 | 3725 | is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks |
0e1862bb | 3726 | && bfd_link_pic (info) |
3348747a NS |
3727 | && !strcmp (input_section->output_section->name, |
3728 | ".tls_vars")); | |
252b5132 | 3729 | |
eb4ff4d6 | 3730 | elf_i386_set_tls_module_base (info); |
9f03412a | 3731 | |
25e762b9 RM |
3732 | plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd); |
3733 | ||
60f2e42e | 3734 | rel = wrel = relocs; |
252b5132 | 3735 | relend = relocs + input_section->reloc_count; |
60f2e42e | 3736 | for (; rel < relend; wrel++, rel++) |
252b5132 | 3737 | { |
13ae64f3 | 3738 | unsigned int r_type; |
252b5132 RH |
3739 | reloc_howto_type *howto; |
3740 | unsigned long r_symndx; | |
3741 | struct elf_link_hash_entry *h; | |
dd7e64d4 | 3742 | struct elf_i386_link_hash_entry *eh; |
252b5132 RH |
3743 | Elf_Internal_Sym *sym; |
3744 | asection *sec; | |
dd7e64d4 | 3745 | bfd_vma off, offplt, plt_offset; |
252b5132 | 3746 | bfd_vma relocation; |
b34976b6 | 3747 | bfd_boolean unresolved_reloc; |
252b5132 | 3748 | bfd_reloc_status_type r; |
1b452ec6 | 3749 | unsigned int indx; |
13ae64f3 | 3750 | int tls_type; |
1788fc08 | 3751 | bfd_vma st_size; |
dd7e64d4 | 3752 | asection *resolved_plt; |
aec6b87e | 3753 | bfd_boolean resolved_to_zero; |
252b5132 RH |
3754 | |
3755 | r_type = ELF32_R_TYPE (rel->r_info); | |
55fd94b0 AM |
3756 | if (r_type == R_386_GNU_VTINHERIT |
3757 | || r_type == R_386_GNU_VTENTRY) | |
18954b29 L |
3758 | { |
3759 | if (wrel != rel) | |
3760 | *wrel = *rel; | |
3761 | continue; | |
3762 | } | |
dc47f327 | 3763 | |
55fd94b0 | 3764 | if ((indx = r_type) >= R_386_standard |
13ae64f3 JJ |
3765 | && ((indx = r_type - R_386_ext_offset) - R_386_standard |
3766 | >= R_386_ext - R_386_standard) | |
3767 | && ((indx = r_type - R_386_tls_offset) - R_386_ext | |
c74be520 | 3768 | >= R_386_ext2 - R_386_ext)) |
252b5132 | 3769 | { |
6ba842b6 | 3770 | (*_bfd_error_handler) |
d003868e AM |
3771 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), |
3772 | input_bfd, input_section, r_type); | |
252b5132 | 3773 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 3774 | return FALSE; |
252b5132 | 3775 | } |
1b452ec6 | 3776 | howto = elf_howto_table + indx; |
252b5132 RH |
3777 | |
3778 | r_symndx = ELF32_R_SYM (rel->r_info); | |
252b5132 RH |
3779 | h = NULL; |
3780 | sym = NULL; | |
3781 | sec = NULL; | |
b34976b6 | 3782 | unresolved_reloc = FALSE; |
252b5132 RH |
3783 | if (r_symndx < symtab_hdr->sh_info) |
3784 | { | |
3785 | sym = local_syms + r_symndx; | |
3786 | sec = local_sections[r_symndx]; | |
3787 | relocation = (sec->output_section->vma | |
3788 | + sec->output_offset | |
3789 | + sym->st_value); | |
1788fc08 | 3790 | st_size = sym->st_size; |
ab96bf03 AM |
3791 | |
3792 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
3793 | && ((sec->flags & SEC_MERGE) != 0 | |
0e1862bb | 3794 | || (bfd_link_relocatable (info) |
ab96bf03 | 3795 | && sec->output_offset != 0))) |
f8df10f4 | 3796 | { |
f8df10f4 | 3797 | bfd_vma addend; |
4a335f3d | 3798 | bfd_byte *where = contents + rel->r_offset; |
f8df10f4 | 3799 | |
4a335f3d | 3800 | switch (howto->size) |
f8df10f4 | 3801 | { |
4a335f3d AM |
3802 | case 0: |
3803 | addend = bfd_get_8 (input_bfd, where); | |
3804 | if (howto->pc_relative) | |
3805 | { | |
3806 | addend = (addend ^ 0x80) - 0x80; | |
3807 | addend += 1; | |
3808 | } | |
3809 | break; | |
3810 | case 1: | |
3811 | addend = bfd_get_16 (input_bfd, where); | |
3812 | if (howto->pc_relative) | |
3813 | { | |
3814 | addend = (addend ^ 0x8000) - 0x8000; | |
3815 | addend += 2; | |
3816 | } | |
3817 | break; | |
3818 | case 2: | |
3819 | addend = bfd_get_32 (input_bfd, where); | |
3820 | if (howto->pc_relative) | |
3821 | { | |
3822 | addend = (addend ^ 0x80000000) - 0x80000000; | |
3823 | addend += 4; | |
3824 | } | |
3825 | break; | |
3826 | default: | |
3827 | abort (); | |
f8df10f4 JJ |
3828 | } |
3829 | ||
0e1862bb | 3830 | if (bfd_link_relocatable (info)) |
ab96bf03 AM |
3831 | addend += sec->output_offset; |
3832 | else | |
3833 | { | |
3834 | asection *msec = sec; | |
3835 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, | |
3836 | addend); | |
3837 | addend -= relocation; | |
3838 | addend += msec->output_section->vma + msec->output_offset; | |
3839 | } | |
4a335f3d AM |
3840 | |
3841 | switch (howto->size) | |
3842 | { | |
3843 | case 0: | |
16a10388 | 3844 | /* FIXME: overflow checks. */ |
4a335f3d AM |
3845 | if (howto->pc_relative) |
3846 | addend -= 1; | |
3847 | bfd_put_8 (input_bfd, addend, where); | |
4a335f3d AM |
3848 | break; |
3849 | case 1: | |
3850 | if (howto->pc_relative) | |
3851 | addend -= 2; | |
3852 | bfd_put_16 (input_bfd, addend, where); | |
4a335f3d AM |
3853 | break; |
3854 | case 2: | |
3855 | if (howto->pc_relative) | |
3856 | addend -= 4; | |
3857 | bfd_put_32 (input_bfd, addend, where); | |
3858 | break; | |
3859 | } | |
f8df10f4 | 3860 | } |
0e1862bb | 3861 | else if (!bfd_link_relocatable (info) |
1f85278f | 3862 | && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc L |
3863 | { |
3864 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
9fff0c39 L |
3865 | h = elf_i386_get_local_sym_hash (htab, input_bfd, rel, |
3866 | FALSE); | |
c25bc9fc L |
3867 | if (h == NULL) |
3868 | abort (); | |
3869 | ||
23209a78 | 3870 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
3871 | h->root.u.def.value = sym->st_value; |
3872 | h->root.u.def.section = sec; | |
3873 | } | |
252b5132 RH |
3874 | } |
3875 | else | |
3876 | { | |
3d540e93 | 3877 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 3878 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
ffb2e45b | 3879 | |
b2a8e766 AM |
3880 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3881 | r_symndx, symtab_hdr, sym_hashes, | |
3882 | h, sec, relocation, | |
62d887d4 | 3883 | unresolved_reloc, warned, ignored); |
1788fc08 | 3884 | st_size = h->size; |
252b5132 RH |
3885 | } |
3886 | ||
dbaa2011 | 3887 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
3888 | { |
3889 | _bfd_clear_contents (howto, input_bfd, input_section, | |
3890 | contents + rel->r_offset); | |
3891 | wrel->r_offset = rel->r_offset; | |
3892 | wrel->r_info = 0; | |
3893 | wrel->r_addend = 0; | |
3894 | ||
3895 | /* For ld -r, remove relocations in debug sections against | |
3896 | sections defined in discarded sections. Not done for | |
3897 | eh_frame editing code expects to be present. */ | |
3898 | if (bfd_link_relocatable (info) | |
3899 | && (input_section->flags & SEC_DEBUGGING)) | |
3900 | wrel--; | |
3901 | ||
3902 | continue; | |
3903 | } | |
9635fe29 | 3904 | |
0e1862bb | 3905 | if (bfd_link_relocatable (info)) |
2d5da473 L |
3906 | { |
3907 | if (wrel != rel) | |
3908 | *wrel = *rel; | |
3909 | continue; | |
3910 | } | |
ab96bf03 | 3911 | |
cbe950e9 L |
3912 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3913 | it here if it is defined in a non-shared object. */ | |
3914 | if (h != NULL | |
3915 | && h->type == STT_GNU_IFUNC | |
3916 | && h->def_regular) | |
3917 | { | |
3918 | asection *plt, *gotplt, *base_got; | |
3919 | bfd_vma plt_index; | |
4c544807 | 3920 | const char *name; |
cbe950e9 | 3921 | |
97dc35c8 L |
3922 | if ((input_section->flags & SEC_ALLOC) == 0) |
3923 | { | |
3924 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
3925 | sections because such sections are not SEC_ALLOC and | |
3926 | thus ld.so will not process them. */ | |
3927 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 3928 | continue; |
97dc35c8 L |
3929 | abort (); |
3930 | } | |
cbe950e9 L |
3931 | |
3932 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 3933 | if (htab->elf.splt != NULL) |
cbe950e9 | 3934 | { |
6de2ae4a L |
3935 | plt = htab->elf.splt; |
3936 | gotplt = htab->elf.sgotplt; | |
cbe950e9 L |
3937 | } |
3938 | else | |
3939 | { | |
6de2ae4a L |
3940 | plt = htab->elf.iplt; |
3941 | gotplt = htab->elf.igotplt; | |
cbe950e9 L |
3942 | } |
3943 | ||
cbe950e9 L |
3944 | switch (r_type) |
3945 | { | |
3946 | default: | |
233cc9c1 | 3947 | break; |
cbe950e9 L |
3948 | |
3949 | case R_386_GOT32: | |
02a86693 | 3950 | case R_386_GOT32X: |
6de2ae4a | 3951 | base_got = htab->elf.sgot; |
cbe950e9 L |
3952 | off = h->got.offset; |
3953 | ||
7afd84dc | 3954 | if (base_got == NULL) |
cbe950e9 L |
3955 | abort (); |
3956 | ||
7afd84dc | 3957 | if (off == (bfd_vma) -1) |
cbe950e9 | 3958 | { |
7afd84dc L |
3959 | /* We can't use h->got.offset here to save state, or |
3960 | even just remember the offset, as finish_dynamic_symbol | |
3961 | would use that as offset into .got. */ | |
6bbec505 | 3962 | |
233cc9c1 L |
3963 | if (h->plt.offset == (bfd_vma) -1) |
3964 | abort (); | |
3965 | ||
6de2ae4a | 3966 | if (htab->elf.splt != NULL) |
7afd84dc | 3967 | { |
25e762b9 | 3968 | plt_index = h->plt.offset / plt_entry_size - 1; |
7afd84dc | 3969 | off = (plt_index + 3) * 4; |
6de2ae4a | 3970 | base_got = htab->elf.sgotplt; |
7afd84dc | 3971 | } |
cbe950e9 L |
3972 | else |
3973 | { | |
25e762b9 | 3974 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 3975 | off = plt_index * 4; |
6de2ae4a | 3976 | base_got = htab->elf.igotplt; |
7afd84dc L |
3977 | } |
3978 | ||
3979 | if (h->dynindx == -1 | |
3980 | || h->forced_local | |
3981 | || info->symbolic) | |
3982 | { | |
3983 | /* This references the local defitionion. We must | |
3984 | initialize this entry in the global offset table. | |
3985 | Since the offset must always be a multiple of 8, | |
3986 | we use the least significant bit to record | |
3987 | whether we have initialized it already. | |
3988 | ||
3989 | When doing a dynamic link, we create a .rela.got | |
3990 | relocation entry to initialize the value. This | |
3991 | is done in the finish_dynamic_symbol routine. */ | |
3992 | if ((off & 1) != 0) | |
3993 | off &= ~1; | |
3994 | else | |
3995 | { | |
3996 | bfd_put_32 (output_bfd, relocation, | |
3997 | base_got->contents + off); | |
3998 | h->got.offset |= 1; | |
3999 | } | |
cbe950e9 | 4000 | } |
cbe950e9 | 4001 | |
7afd84dc | 4002 | relocation = off; |
7afd84dc L |
4003 | } |
4004 | else | |
ca8c86ef L |
4005 | relocation = (base_got->output_section->vma |
4006 | + base_got->output_offset + off | |
4007 | - gotplt->output_section->vma | |
4008 | - gotplt->output_offset); | |
4009 | ||
712ec279 L |
4010 | if ((*(contents + rel->r_offset - 1) & 0xc7) == 0x5) |
4011 | { | |
4012 | if (bfd_link_pic (info)) | |
4013 | goto disallow_got32; | |
4014 | ||
4015 | /* Add the GOT base if there is no base register. */ | |
4016 | relocation += (gotplt->output_section->vma | |
4017 | + gotplt->output_offset); | |
4018 | } | |
4019 | else if (htab->elf.splt == NULL) | |
4020 | { | |
4021 | /* Adjust for static executables. */ | |
4022 | relocation += gotplt->output_offset; | |
4023 | } | |
0018b0a3 | 4024 | |
cbe950e9 | 4025 | goto do_relocation; |
233cc9c1 L |
4026 | } |
4027 | ||
4028 | if (h->plt.offset == (bfd_vma) -1) | |
4029 | { | |
4030 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
4031 | if (r_type == R_386_32 | |
4032 | && (input_section->flags & SEC_CODE) == 0) | |
4033 | goto do_ifunc_pointer; | |
4034 | goto bad_ifunc_reloc; | |
4035 | } | |
4036 | ||
4037 | relocation = (plt->output_section->vma | |
4038 | + plt->output_offset + h->plt.offset); | |
4039 | ||
4040 | switch (r_type) | |
4041 | { | |
4042 | default: | |
4043 | bad_ifunc_reloc: | |
4044 | if (h->root.root.string) | |
4045 | name = h->root.root.string; | |
4046 | else | |
4047 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
4048 | NULL); | |
4049 | (*_bfd_error_handler) | |
4050 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
4051 | "symbol `%s' isn't supported"), input_bfd, | |
4052 | howto->name, name); | |
4053 | bfd_set_error (bfd_error_bad_value); | |
4054 | return FALSE; | |
4055 | ||
4056 | case R_386_32: | |
4057 | /* Generate dynamic relcoation only when there is a | |
4058 | non-GOT reference in a shared object. */ | |
4059 | if ((bfd_link_pic (info) && h->non_got_ref) | |
4060 | || h->plt.offset == (bfd_vma) -1) | |
4061 | { | |
4062 | Elf_Internal_Rela outrel; | |
4063 | asection *sreloc; | |
4064 | bfd_vma offset; | |
4065 | ||
4066 | do_ifunc_pointer: | |
4067 | /* Need a dynamic relocation to get the real function | |
4068 | adddress. */ | |
4069 | offset = _bfd_elf_section_offset (output_bfd, | |
4070 | info, | |
4071 | input_section, | |
4072 | rel->r_offset); | |
4073 | if (offset == (bfd_vma) -1 | |
4074 | || offset == (bfd_vma) -2) | |
4075 | abort (); | |
4076 | ||
4077 | outrel.r_offset = (input_section->output_section->vma | |
4078 | + input_section->output_offset | |
4079 | + offset); | |
4080 | ||
4081 | if (h->dynindx == -1 | |
4082 | || h->forced_local | |
4083 | || bfd_link_executable (info)) | |
4084 | { | |
4085 | /* This symbol is resolved locally. */ | |
4086 | outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
4087 | bfd_put_32 (output_bfd, | |
4088 | (h->root.u.def.value | |
4089 | + h->root.u.def.section->output_section->vma | |
4090 | + h->root.u.def.section->output_offset), | |
4091 | contents + offset); | |
4092 | } | |
4093 | else | |
4094 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
4095 | ||
4096 | /* Dynamic relocations are stored in | |
4097 | 1. .rel.ifunc section in PIC object. | |
4098 | 2. .rel.got section in dynamic executable. | |
4099 | 3. .rel.iplt section in static executable. */ | |
4100 | if (bfd_link_pic (info)) | |
4101 | sreloc = htab->elf.irelifunc; | |
4102 | else if (htab->elf.splt != NULL) | |
4103 | sreloc = htab->elf.srelgot; | |
4104 | else | |
4105 | sreloc = htab->elf.irelplt; | |
4106 | elf_append_rel (output_bfd, sreloc, &outrel); | |
4107 | ||
4108 | /* If this reloc is against an external symbol, we | |
4109 | do not want to fiddle with the addend. Otherwise, | |
4110 | we need to include the symbol value so that it | |
4111 | becomes an addend for the dynamic reloc. For an | |
4112 | internal symbol, we have updated addend. */ | |
4113 | continue; | |
4114 | } | |
4115 | /* FALLTHROUGH */ | |
4116 | case R_386_PC32: | |
4117 | case R_386_PLT32: | |
4118 | goto do_relocation; | |
cbe950e9 L |
4119 | |
4120 | case R_386_GOTOFF: | |
4121 | relocation -= (gotplt->output_section->vma | |
4122 | + gotplt->output_offset); | |
4123 | goto do_relocation; | |
4124 | } | |
4125 | } | |
4126 | ||
04ebc307 | 4127 | eh = (struct elf_i386_link_hash_entry *) h; |
aec6b87e | 4128 | resolved_to_zero = (eh != NULL |
e62b9723 L |
4129 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
4130 | eh->has_got_reloc, | |
4131 | eh)); | |
aec6b87e | 4132 | |
252b5132 RH |
4133 | switch (r_type) |
4134 | { | |
02a86693 L |
4135 | case R_386_GOT32X: |
4136 | /* Avoid optimizing _DYNAMIC since ld.so may use its | |
4137 | link-time address. */ | |
4138 | if (h == htab->elf.hdynamic) | |
4139 | goto r_386_got32; | |
4140 | ||
4141 | if (bfd_link_pic (info)) | |
4142 | { | |
4143 | /* It is OK to convert mov to lea and convert indirect | |
4144 | branch to direct branch. It is OK to convert adc, | |
4145 | add, and, cmp, or, sbb, sub, test, xor only when PIC | |
4146 | is false. */ | |
02e2aef8 L |
4147 | unsigned int opcode, addend; |
4148 | addend = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
4149 | if (addend != 0) | |
4150 | goto r_386_got32; | |
4151 | opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
02a86693 L |
4152 | if (opcode != 0x8b && opcode != 0xff) |
4153 | goto r_386_got32; | |
4154 | } | |
4155 | ||
4156 | /* Resolve "mov GOT[(%reg)], %reg", | |
4157 | "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]" | |
4158 | and "binop foo@GOT[(%reg)], %reg". */ | |
4159 | if (h == NULL | |
4160 | || (h->plt.offset == (bfd_vma) -1 | |
4161 | && h->got.offset == (bfd_vma) -1) | |
4162 | || htab->elf.sgotplt == NULL) | |
4163 | abort (); | |
4164 | ||
4165 | offplt = (htab->elf.sgotplt->output_section->vma | |
4166 | + htab->elf.sgotplt->output_offset); | |
4167 | ||
4168 | /* It is relative to .got.plt section. */ | |
4169 | if (h->got.offset != (bfd_vma) -1) | |
32875eb1 L |
4170 | /* Use GOT entry. Mask off the least significant bit in |
4171 | GOT offset which may be set by R_386_GOT32 processing | |
4172 | below. */ | |
02a86693 L |
4173 | relocation = (htab->elf.sgot->output_section->vma |
4174 | + htab->elf.sgot->output_offset | |
32875eb1 | 4175 | + (h->got.offset & ~1) - offplt); |
02a86693 L |
4176 | else |
4177 | /* Use GOTPLT entry. */ | |
4178 | relocation = (h->plt.offset / plt_entry_size - 1 + 3) * 4; | |
4179 | ||
4180 | if (!bfd_link_pic (info)) | |
4181 | { | |
4182 | /* If not PIC, add the .got.plt section address for | |
a3718e9e | 4183 | baseless addressing. */ |
02a86693 | 4184 | unsigned int modrm; |
02e2aef8 | 4185 | modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
02a86693 L |
4186 | if ((modrm & 0xc7) == 0x5) |
4187 | relocation += offplt; | |
4188 | } | |
4189 | ||
4190 | unresolved_reloc = FALSE; | |
4191 | break; | |
4192 | ||
252b5132 | 4193 | case R_386_GOT32: |
02a86693 | 4194 | r_386_got32: |
252b5132 RH |
4195 | /* Relocation is to the entry for this symbol in the global |
4196 | offset table. */ | |
6de2ae4a | 4197 | if (htab->elf.sgot == NULL) |
ffb2e45b | 4198 | abort (); |
252b5132 RH |
4199 | |
4200 | if (h != NULL) | |
4201 | { | |
b34976b6 | 4202 | bfd_boolean dyn; |
252b5132 RH |
4203 | |
4204 | off = h->got.offset; | |
ebe50bae | 4205 | dyn = htab->elf.dynamic_sections_created; |
0e1862bb L |
4206 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
4207 | bfd_link_pic (info), | |
4208 | h) | |
4209 | || (bfd_link_pic (info) | |
586119b3 | 4210 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
ef5aade5 L |
4211 | || (ELF_ST_VISIBILITY (h->other) |
4212 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
4213 | { |
4214 | /* This is actually a static link, or it is a | |
4215 | -Bsymbolic link and the symbol is defined | |
4216 | locally, or the symbol was forced to be local | |
4217 | because of a version file. We must initialize | |
4218 | this entry in the global offset table. Since the | |
4219 | offset must always be a multiple of 4, we use the | |
4220 | least significant bit to record whether we have | |
4221 | initialized it already. | |
4222 | ||
4223 | When doing a dynamic link, we create a .rel.got | |
4224 | relocation entry to initialize the value. This | |
4225 | is done in the finish_dynamic_symbol routine. */ | |
4226 | if ((off & 1) != 0) | |
4227 | off &= ~1; | |
4228 | else | |
4229 | { | |
4230 | bfd_put_32 (output_bfd, relocation, | |
6de2ae4a | 4231 | htab->elf.sgot->contents + off); |
252b5132 RH |
4232 | h->got.offset |= 1; |
4233 | } | |
4234 | } | |
8c694914 | 4235 | else |
b34976b6 | 4236 | unresolved_reloc = FALSE; |
252b5132 RH |
4237 | } |
4238 | else | |
4239 | { | |
ffb2e45b AM |
4240 | if (local_got_offsets == NULL) |
4241 | abort (); | |
252b5132 RH |
4242 | |
4243 | off = local_got_offsets[r_symndx]; | |
4244 | ||
4245 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
4246 | the least significant bit to record whether we have |
4247 | already generated the necessary reloc. */ | |
252b5132 RH |
4248 | if ((off & 1) != 0) |
4249 | off &= ~1; | |
4250 | else | |
4251 | { | |
6725bdbf | 4252 | bfd_put_32 (output_bfd, relocation, |
6de2ae4a | 4253 | htab->elf.sgot->contents + off); |
252b5132 | 4254 | |
0e1862bb | 4255 | if (bfd_link_pic (info)) |
252b5132 | 4256 | { |
947216bf AM |
4257 | asection *s; |
4258 | Elf_Internal_Rela outrel; | |
252b5132 | 4259 | |
6de2ae4a | 4260 | s = htab->elf.srelgot; |
947216bf | 4261 | if (s == NULL) |
ffb2e45b | 4262 | abort (); |
252b5132 | 4263 | |
6de2ae4a L |
4264 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4265 | + htab->elf.sgot->output_offset | |
252b5132 RH |
4266 | + off); |
4267 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
59d6ffb2 | 4268 | elf_append_rel (output_bfd, s, &outrel); |
252b5132 RH |
4269 | } |
4270 | ||
4271 | local_got_offsets[r_symndx] |= 1; | |
4272 | } | |
252b5132 RH |
4273 | } |
4274 | ||
ffb2e45b AM |
4275 | if (off >= (bfd_vma) -2) |
4276 | abort (); | |
4277 | ||
74d7f0aa L |
4278 | relocation = (htab->elf.sgot->output_section->vma |
4279 | + htab->elf.sgot->output_offset + off); | |
4280 | if ((*(contents + rel->r_offset - 1) & 0xc7) == 0x5) | |
4281 | { | |
4282 | if (bfd_link_pic (info)) | |
4283 | { | |
4284 | /* For PIC, disallow R_386_GOT32 without a base | |
4285 | register since we don't know what the GOT base | |
4286 | is. */ | |
4287 | const char *name; | |
4288 | ||
712ec279 | 4289 | disallow_got32: |
74d7f0aa L |
4290 | if (h == NULL) |
4291 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
4292 | NULL); | |
4293 | else | |
4294 | name = h->root.root.string; | |
4295 | ||
4296 | (*_bfd_error_handler) | |
712ec279 L |
4297 | (_("%B: direct GOT relocation %s against `%s' without base register can not be used when making a shared object"), |
4298 | input_bfd, howto->name, name); | |
74d7f0aa L |
4299 | bfd_set_error (bfd_error_bad_value); |
4300 | return FALSE; | |
4301 | } | |
4302 | } | |
4303 | else | |
4304 | { | |
4305 | /* Subtract the .got.plt section address only with a base | |
4306 | register. */ | |
4307 | relocation -= (htab->elf.sgotplt->output_section->vma | |
4308 | + htab->elf.sgotplt->output_offset); | |
4309 | } | |
4310 | ||
252b5132 RH |
4311 | break; |
4312 | ||
4313 | case R_386_GOTOFF: | |
4314 | /* Relocation is relative to the start of the global offset | |
4315 | table. */ | |
4316 | ||
3d949995 L |
4317 | /* Check to make sure it isn't a protected function or data |
4318 | symbol for shared library since it may not be local when | |
4319 | used as function address or with copy relocation. We also | |
e3c0e327 | 4320 | need to make sure that a symbol is referenced locally. */ |
0e1862bb | 4321 | if (!bfd_link_executable (info) && h) |
90f487df | 4322 | { |
41bed6dd L |
4323 | if (!h->def_regular) |
4324 | { | |
4325 | const char *v; | |
4326 | ||
4327 | switch (ELF_ST_VISIBILITY (h->other)) | |
4328 | { | |
4329 | case STV_HIDDEN: | |
4330 | v = _("hidden symbol"); | |
4331 | break; | |
4332 | case STV_INTERNAL: | |
4333 | v = _("internal symbol"); | |
4334 | break; | |
4335 | case STV_PROTECTED: | |
4336 | v = _("protected symbol"); | |
4337 | break; | |
4338 | default: | |
4339 | v = _("symbol"); | |
4340 | break; | |
4341 | } | |
4342 | ||
4343 | (*_bfd_error_handler) | |
4344 | (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"), | |
4345 | input_bfd, v, h->root.root.string); | |
4346 | bfd_set_error (bfd_error_bad_value); | |
4347 | return FALSE; | |
4348 | } | |
d5597ebc | 4349 | else if (!SYMBOL_REFERENCES_LOCAL (info, h) |
3d949995 L |
4350 | && (h->type == STT_FUNC |
4351 | || h->type == STT_OBJECT) | |
41bed6dd L |
4352 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) |
4353 | { | |
4354 | (*_bfd_error_handler) | |
3d949995 L |
4355 | (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"), |
4356 | input_bfd, | |
4357 | h->type == STT_FUNC ? "function" : "data", | |
4358 | h->root.root.string); | |
41bed6dd L |
4359 | bfd_set_error (bfd_error_bad_value); |
4360 | return FALSE; | |
4361 | } | |
90f487df L |
4362 | } |
4363 | ||
8c37241b JJ |
4364 | /* Note that sgot is not involved in this |
4365 | calculation. We always want the start of .got.plt. If we | |
4366 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
252b5132 RH |
4367 | permitted by the ABI, we might have to change this |
4368 | calculation. */ | |
6de2ae4a L |
4369 | relocation -= htab->elf.sgotplt->output_section->vma |
4370 | + htab->elf.sgotplt->output_offset; | |
252b5132 RH |
4371 | break; |
4372 | ||
4373 | case R_386_GOTPC: | |
4374 | /* Use global offset table as symbol value. */ | |
6de2ae4a L |
4375 | relocation = htab->elf.sgotplt->output_section->vma |
4376 | + htab->elf.sgotplt->output_offset; | |
b34976b6 | 4377 | unresolved_reloc = FALSE; |
252b5132 RH |
4378 | break; |
4379 | ||
4380 | case R_386_PLT32: | |
4381 | /* Relocation is to the entry for this symbol in the | |
4382 | procedure linkage table. */ | |
4383 | ||
dd5724d5 | 4384 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 4385 | without using the procedure linkage table. */ |
252b5132 RH |
4386 | if (h == NULL) |
4387 | break; | |
4388 | ||
dd7e64d4 L |
4389 | if ((h->plt.offset == (bfd_vma) -1 |
4390 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 4391 | || htab->elf.splt == NULL) |
252b5132 RH |
4392 | { |
4393 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
4394 | happens when statically linking PIC code, or when |
4395 | using -Bsymbolic. */ | |
252b5132 RH |
4396 | break; |
4397 | } | |
4398 | ||
dd7e64d4 L |
4399 | if (h->plt.offset != (bfd_vma) -1) |
4400 | { | |
4401 | resolved_plt = htab->elf.splt; | |
4402 | plt_offset = h->plt.offset; | |
4403 | } | |
4404 | else | |
4405 | { | |
4406 | resolved_plt = htab->plt_got; | |
4407 | plt_offset = eh->plt_got.offset; | |
4408 | } | |
4409 | ||
4410 | relocation = (resolved_plt->output_section->vma | |
4411 | + resolved_plt->output_offset | |
4412 | + plt_offset); | |
b34976b6 | 4413 | unresolved_reloc = FALSE; |
252b5132 RH |
4414 | break; |
4415 | ||
1788fc08 | 4416 | case R_386_SIZE32: |
1788fc08 L |
4417 | /* Set to symbol size. */ |
4418 | relocation = st_size; | |
4419 | /* Fall through. */ | |
4420 | ||
252b5132 RH |
4421 | case R_386_32: |
4422 | case R_386_PC32: | |
3348747a NS |
4423 | if ((input_section->flags & SEC_ALLOC) == 0 |
4424 | || is_vxworks_tls) | |
ec338859 AM |
4425 | break; |
4426 | ||
aec6b87e L |
4427 | /* Copy dynamic function pointer relocations. Don't generate |
4428 | dynamic relocations against resolved undefined weak symbols | |
4429 | in PIE, except for R_386_PC32. */ | |
0e1862bb | 4430 | if ((bfd_link_pic (info) |
ef5aade5 | 4431 | && (h == NULL |
aec6b87e L |
4432 | || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
4433 | && (!resolved_to_zero | |
4434 | || r_type == R_386_PC32)) | |
4435 | || h->root.type != bfd_link_hash_undefweak)) | |
1788fc08 | 4436 | && ((r_type != R_386_PC32 && r_type != R_386_SIZE32) |
f6c52c13 | 4437 | || !SYMBOL_CALLS_LOCAL (info, h))) |
a23b6845 | 4438 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 4439 | && !bfd_link_pic (info) |
12d0ee4a AM |
4440 | && h != NULL |
4441 | && h->dynindx != -1 | |
aec6b87e L |
4442 | && (!h->non_got_ref |
4443 | || eh->func_pointer_refcount > 0 | |
4444 | || (h->root.type == bfd_link_hash_undefweak | |
4445 | && !resolved_to_zero)) | |
bae420ef L |
4446 | && ((h->def_dynamic && !h->def_regular) |
4447 | /* Undefined weak symbol is bound locally when | |
4448 | PIC is false. */ | |
4449 | || h->root.type == bfd_link_hash_undefweak))) | |
252b5132 | 4450 | { |
947216bf | 4451 | Elf_Internal_Rela outrel; |
b34976b6 | 4452 | bfd_boolean skip, relocate; |
0c715baa | 4453 | asection *sreloc; |
252b5132 RH |
4454 | |
4455 | /* When generating a shared object, these relocations | |
4456 | are copied into the output file to be resolved at run | |
4457 | time. */ | |
4458 | ||
b34976b6 AM |
4459 | skip = FALSE; |
4460 | relocate = FALSE; | |
252b5132 | 4461 | |
c629eae0 JJ |
4462 | outrel.r_offset = |
4463 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
4464 | rel->r_offset); | |
4465 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 4466 | skip = TRUE; |
0bb2d96a | 4467 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 4468 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
4469 | outrel.r_offset += (input_section->output_section->vma |
4470 | + input_section->output_offset); | |
4471 | ||
4472 | if (skip) | |
0bb2d96a | 4473 | memset (&outrel, 0, sizeof outrel); |
5a15f56f AM |
4474 | else if (h != NULL |
4475 | && h->dynindx != -1 | |
4476 | && (r_type == R_386_PC32 | |
4e0c91e4 L |
4477 | || !(bfd_link_executable (info) |
4478 | || SYMBOLIC_BIND (info, h)) | |
f5385ebf | 4479 | || !h->def_regular)) |
0bb2d96a | 4480 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
4481 | else |
4482 | { | |
5a15f56f | 4483 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 4484 | relocate = TRUE; |
5a15f56f | 4485 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
252b5132 RH |
4486 | } |
4487 | ||
cbe950e9 | 4488 | sreloc = elf_section_data (input_section)->sreloc; |
e7c33416 | 4489 | |
62d78908 L |
4490 | if (sreloc == NULL || sreloc->contents == NULL) |
4491 | { | |
4492 | r = bfd_reloc_notsupported; | |
4493 | goto check_relocation_error; | |
4494 | } | |
0c715baa | 4495 | |
59d6ffb2 | 4496 | elf_append_rel (output_bfd, sreloc, &outrel); |
252b5132 RH |
4497 | |
4498 | /* If this reloc is against an external symbol, we do | |
4499 | not want to fiddle with the addend. Otherwise, we | |
4500 | need to include the symbol value so that it becomes | |
4501 | an addend for the dynamic reloc. */ | |
0f88be7a | 4502 | if (! relocate) |
252b5132 RH |
4503 | continue; |
4504 | } | |
252b5132 RH |
4505 | break; |
4506 | ||
37e55690 | 4507 | case R_386_TLS_IE: |
0e1862bb | 4508 | if (!bfd_link_executable (info)) |
37e55690 | 4509 | { |
947216bf | 4510 | Elf_Internal_Rela outrel; |
37e55690 | 4511 | asection *sreloc; |
37e55690 JJ |
4512 | |
4513 | outrel.r_offset = rel->r_offset | |
4514 | + input_section->output_section->vma | |
4515 | + input_section->output_offset; | |
4516 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
4517 | sreloc = elf_section_data (input_section)->sreloc; | |
4518 | if (sreloc == NULL) | |
4519 | abort (); | |
59d6ffb2 | 4520 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
4521 | } |
4522 | /* Fall through */ | |
4523 | ||
13ae64f3 | 4524 | case R_386_TLS_GD: |
67a4f2b7 AO |
4525 | case R_386_TLS_GOTDESC: |
4526 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 4527 | case R_386_TLS_IE_32: |
37e55690 | 4528 | case R_386_TLS_GOTIE: |
13ae64f3 JJ |
4529 | tls_type = GOT_UNKNOWN; |
4530 | if (h == NULL && local_got_offsets) | |
4531 | tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx]; | |
4532 | else if (h != NULL) | |
142411ca | 4533 | tls_type = elf_i386_hash_entry(h)->tls_type; |
37e55690 JJ |
4534 | if (tls_type == GOT_TLS_IE) |
4535 | tls_type = GOT_TLS_IE_NEG; | |
142411ca L |
4536 | |
4537 | if (! elf_i386_tls_transition (info, input_bfd, | |
4538 | input_section, contents, | |
4539 | symtab_hdr, sym_hashes, | |
4540 | &r_type, tls_type, rel, | |
bedfd056 | 4541 | relend, h, r_symndx, TRUE)) |
142411ca | 4542 | return FALSE; |
13ae64f3 JJ |
4543 | |
4544 | if (r_type == R_386_TLS_LE_32) | |
4545 | { | |
82e51918 | 4546 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 JJ |
4547 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
4548 | { | |
142411ca | 4549 | unsigned int type; |
13ae64f3 JJ |
4550 | bfd_vma roff; |
4551 | ||
4552 | /* GD->LE transition. */ | |
6eaa7fb5 | 4553 | type = *(contents + rel->r_offset - 2); |
13ae64f3 JJ |
4554 | if (type == 0x04) |
4555 | { | |
6eaa7fb5 L |
4556 | /* Change |
4557 | leal foo@tlsgd(,%ebx,1), %eax | |
4558 | call ___tls_get_addr@PLT | |
4559 | into: | |
4560 | movl %gs:0, %eax | |
4561 | subl $foo@tpoff, %eax | |
13ae64f3 | 4562 | (6 byte form of subl). */ |
142411ca | 4563 | roff = rel->r_offset + 5; |
13ae64f3 JJ |
4564 | } |
4565 | else | |
4566 | { | |
6eaa7fb5 L |
4567 | /* Change |
4568 | leal foo@tlsgd(%ebx), %eax | |
4569 | call ___tls_get_addr@PLT | |
4570 | nop | |
4571 | or | |
4572 | leal foo@tlsgd(%reg), %eax | |
4573 | call *___tls_get_addr@GOT(%reg) | |
4574 | which may be converted to | |
4575 | addr32 call ___tls_get_addr | |
4576 | into: | |
4577 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
142411ca | 4578 | (6 byte form of subl). */ |
142411ca | 4579 | roff = rel->r_offset + 6; |
13ae64f3 | 4580 | } |
6eaa7fb5 L |
4581 | memcpy (contents + roff - 8, |
4582 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
eb4ff4d6 | 4583 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
13ae64f3 | 4584 | contents + roff); |
6eaa7fb5 | 4585 | /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */ |
13ae64f3 | 4586 | rel++; |
60f2e42e | 4587 | wrel++; |
13ae64f3 JJ |
4588 | continue; |
4589 | } | |
67a4f2b7 AO |
4590 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
4591 | { | |
4592 | /* GDesc -> LE transition. | |
4593 | It's originally something like: | |
4594 | leal x@tlsdesc(%ebx), %eax | |
4595 | ||
4596 | leal x@ntpoff, %eax | |
4597 | ||
4598 | Registers other than %eax may be set up here. */ | |
4599 | ||
142411ca | 4600 | unsigned int val; |
67a4f2b7 AO |
4601 | bfd_vma roff; |
4602 | ||
67a4f2b7 | 4603 | roff = rel->r_offset; |
67a4f2b7 | 4604 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
4605 | |
4606 | /* Now modify the instruction as appropriate. */ | |
4607 | /* aoliva FIXME: remove the above and xor the byte | |
4608 | below with 0x86. */ | |
4609 | bfd_put_8 (output_bfd, val ^ 0x86, | |
4610 | contents + roff - 1); | |
eb4ff4d6 | 4611 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
67a4f2b7 AO |
4612 | contents + roff); |
4613 | continue; | |
4614 | } | |
4615 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
4616 | { | |
4617 | /* GDesc -> LE transition. | |
4618 | It's originally: | |
4619 | call *(%eax) | |
4620 | Turn it into: | |
142411ca | 4621 | xchg %ax,%ax */ |
67a4f2b7 | 4622 | |
67a4f2b7 | 4623 | bfd_vma roff; |
6bbec505 | 4624 | |
67a4f2b7 | 4625 | roff = rel->r_offset; |
10efb593 | 4626 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
4627 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4628 | continue; | |
4629 | } | |
37e55690 | 4630 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE) |
13ae64f3 | 4631 | { |
142411ca | 4632 | unsigned int val; |
13ae64f3 JJ |
4633 | |
4634 | /* IE->LE transition: | |
37e55690 JJ |
4635 | Originally it can be one of: |
4636 | movl foo, %eax | |
4637 | movl foo, %reg | |
4638 | addl foo, %reg | |
4639 | We change it into: | |
4640 | movl $foo, %eax | |
4641 | movl $foo, %reg | |
4642 | addl $foo, %reg. */ | |
37e55690 | 4643 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
37e55690 JJ |
4644 | if (val == 0xa1) |
4645 | { | |
4646 | /* movl foo, %eax. */ | |
55fd94b0 AM |
4647 | bfd_put_8 (output_bfd, 0xb8, |
4648 | contents + rel->r_offset - 1); | |
37e55690 | 4649 | } |
299bf759 | 4650 | else |
37e55690 | 4651 | { |
142411ca L |
4652 | unsigned int type; |
4653 | ||
55fd94b0 AM |
4654 | type = bfd_get_8 (input_bfd, |
4655 | contents + rel->r_offset - 2); | |
299bf759 | 4656 | switch (type) |
26e41594 | 4657 | { |
299bf759 L |
4658 | case 0x8b: |
4659 | /* movl */ | |
299bf759 L |
4660 | bfd_put_8 (output_bfd, 0xc7, |
4661 | contents + rel->r_offset - 2); | |
4662 | bfd_put_8 (output_bfd, | |
4663 | 0xc0 | ((val >> 3) & 7), | |
4664 | contents + rel->r_offset - 1); | |
4665 | break; | |
4666 | case 0x03: | |
4667 | /* addl */ | |
299bf759 L |
4668 | bfd_put_8 (output_bfd, 0x81, |
4669 | contents + rel->r_offset - 2); | |
4670 | bfd_put_8 (output_bfd, | |
4671 | 0xc0 | ((val >> 3) & 7), | |
4672 | contents + rel->r_offset - 1); | |
4673 | break; | |
4674 | default: | |
4675 | BFD_FAIL (); | |
4676 | break; | |
26e41594 | 4677 | } |
37e55690 | 4678 | } |
eb4ff4d6 | 4679 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
4680 | contents + rel->r_offset); |
4681 | continue; | |
4682 | } | |
4683 | else | |
4684 | { | |
4685 | unsigned int val, type; | |
4686 | ||
4687 | /* {IE_32,GOTIE}->LE transition: | |
4688 | Originally it can be one of: | |
13ae64f3 | 4689 | subl foo(%reg1), %reg2 |
13ae64f3 | 4690 | movl foo(%reg1), %reg2 |
37e55690 | 4691 | addl foo(%reg1), %reg2 |
13ae64f3 JJ |
4692 | We change it into: |
4693 | subl $foo, %reg2 | |
37e55690 JJ |
4694 | movl $foo, %reg2 (6 byte form) |
4695 | addl $foo, %reg2. */ | |
13ae64f3 JJ |
4696 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
4697 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
13ae64f3 JJ |
4698 | if (type == 0x8b) |
4699 | { | |
4700 | /* movl */ | |
13ae64f3 JJ |
4701 | bfd_put_8 (output_bfd, 0xc7, |
4702 | contents + rel->r_offset - 2); | |
4703 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4704 | contents + rel->r_offset - 1); | |
4705 | } | |
4706 | else if (type == 0x2b) | |
4707 | { | |
4708 | /* subl */ | |
13ae64f3 JJ |
4709 | bfd_put_8 (output_bfd, 0x81, |
4710 | contents + rel->r_offset - 2); | |
4711 | bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7), | |
4712 | contents + rel->r_offset - 1); | |
4713 | } | |
37e55690 JJ |
4714 | else if (type == 0x03) |
4715 | { | |
4716 | /* addl */ | |
4717 | bfd_put_8 (output_bfd, 0x81, | |
4718 | contents + rel->r_offset - 2); | |
4719 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4720 | contents + rel->r_offset - 1); | |
4721 | } | |
13ae64f3 JJ |
4722 | else |
4723 | BFD_FAIL (); | |
37e55690 | 4724 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE) |
eb4ff4d6 | 4725 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
4726 | contents + rel->r_offset); |
4727 | else | |
eb4ff4d6 | 4728 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
37e55690 | 4729 | contents + rel->r_offset); |
13ae64f3 JJ |
4730 | continue; |
4731 | } | |
4732 | } | |
4733 | ||
6de2ae4a | 4734 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
4735 | abort (); |
4736 | ||
4737 | if (h != NULL) | |
67a4f2b7 AO |
4738 | { |
4739 | off = h->got.offset; | |
4740 | offplt = elf_i386_hash_entry (h)->tlsdesc_got; | |
4741 | } | |
13ae64f3 JJ |
4742 | else |
4743 | { | |
4744 | if (local_got_offsets == NULL) | |
4745 | abort (); | |
4746 | ||
4747 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 4748 | offplt = local_tlsdesc_gotents[r_symndx]; |
13ae64f3 JJ |
4749 | } |
4750 | ||
4751 | if ((off & 1) != 0) | |
4752 | off &= ~1; | |
26e41594 | 4753 | else |
13ae64f3 | 4754 | { |
947216bf | 4755 | Elf_Internal_Rela outrel; |
91d6fa6a | 4756 | int dr_type; |
67a4f2b7 | 4757 | asection *sreloc; |
13ae64f3 | 4758 | |
6de2ae4a | 4759 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
4760 | abort (); |
4761 | ||
67a4f2b7 AO |
4762 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4763 | ||
4764 | if (GOT_TLS_GDESC_P (tls_type)) | |
4765 | { | |
59d6ffb2 | 4766 | bfd_byte *loc; |
67a4f2b7 AO |
4767 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC); |
4768 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8 | |
6de2ae4a L |
4769 | <= htab->elf.sgotplt->size); |
4770 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4771 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4772 | + offplt |
4773 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4774 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4775 | loc = sreloc->contents; |
5ae0bfb6 RS |
4776 | loc += (htab->next_tls_desc_index++ |
4777 | * sizeof (Elf32_External_Rel)); | |
67a4f2b7 | 4778 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
c3b02097 | 4779 | <= sreloc->contents + sreloc->size); |
67a4f2b7 AO |
4780 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
4781 | if (indx == 0) | |
4782 | { | |
4783 | BFD_ASSERT (! unresolved_reloc); | |
4784 | bfd_put_32 (output_bfd, | |
eb4ff4d6 | 4785 | relocation - elf_i386_dtpoff_base (info), |
6de2ae4a | 4786 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4787 | + htab->sgotplt_jump_table_size + 4); |
4788 | } | |
4789 | else | |
4790 | { | |
4791 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4792 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4793 | + htab->sgotplt_jump_table_size + 4); |
4794 | } | |
4795 | } | |
4796 | ||
6de2ae4a | 4797 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4798 | |
6de2ae4a L |
4799 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4800 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 | 4801 | |
67a4f2b7 | 4802 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 | 4803 | dr_type = R_386_TLS_DTPMOD32; |
67a4f2b7 AO |
4804 | else if (GOT_TLS_GDESC_P (tls_type)) |
4805 | goto dr_done; | |
37e55690 JJ |
4806 | else if (tls_type == GOT_TLS_IE_POS) |
4807 | dr_type = R_386_TLS_TPOFF; | |
13ae64f3 JJ |
4808 | else |
4809 | dr_type = R_386_TLS_TPOFF32; | |
67a4f2b7 | 4810 | |
37e55690 | 4811 | if (dr_type == R_386_TLS_TPOFF && indx == 0) |
eb4ff4d6 L |
4812 | bfd_put_32 (output_bfd, |
4813 | relocation - elf_i386_dtpoff_base (info), | |
6de2ae4a | 4814 | htab->elf.sgot->contents + off); |
37e55690 | 4815 | else if (dr_type == R_386_TLS_TPOFF32 && indx == 0) |
23209a78 | 4816 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 4817 | elf_i386_dtpoff_base (info) - relocation, |
6de2ae4a | 4818 | htab->elf.sgot->contents + off); |
67a4f2b7 | 4819 | else if (dr_type != R_386_TLS_DESC) |
c366c25e | 4820 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 4821 | htab->elf.sgot->contents + off); |
13ae64f3 | 4822 | outrel.r_info = ELF32_R_INFO (indx, dr_type); |
67a4f2b7 | 4823 | |
59d6ffb2 | 4824 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 | 4825 | |
67a4f2b7 | 4826 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 JJ |
4827 | { |
4828 | if (indx == 0) | |
4829 | { | |
82e51918 | 4830 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 | 4831 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 4832 | relocation - elf_i386_dtpoff_base (info), |
6de2ae4a | 4833 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4834 | } |
4835 | else | |
4836 | { | |
4837 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4838 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4839 | outrel.r_info = ELF32_R_INFO (indx, |
4840 | R_386_TLS_DTPOFF32); | |
4841 | outrel.r_offset += 4; | |
59d6ffb2 | 4842 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 JJ |
4843 | } |
4844 | } | |
37e55690 JJ |
4845 | else if (tls_type == GOT_TLS_IE_BOTH) |
4846 | { | |
4847 | bfd_put_32 (output_bfd, | |
eb4ff4d6 L |
4848 | (indx == 0 |
4849 | ? relocation - elf_i386_dtpoff_base (info) | |
4850 | : 0), | |
6de2ae4a | 4851 | htab->elf.sgot->contents + off + 4); |
37e55690 JJ |
4852 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); |
4853 | outrel.r_offset += 4; | |
59d6ffb2 | 4854 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 | 4855 | } |
13ae64f3 | 4856 | |
67a4f2b7 | 4857 | dr_done: |
13ae64f3 JJ |
4858 | if (h != NULL) |
4859 | h->got.offset |= 1; | |
4860 | else | |
4861 | local_got_offsets[r_symndx] |= 1; | |
4862 | } | |
4863 | ||
67a4f2b7 AO |
4864 | if (off >= (bfd_vma) -2 |
4865 | && ! GOT_TLS_GDESC_P (tls_type)) | |
13ae64f3 | 4866 | abort (); |
67a4f2b7 AO |
4867 | if (r_type == R_386_TLS_GOTDESC |
4868 | || r_type == R_386_TLS_DESC_CALL) | |
4869 | { | |
4870 | relocation = htab->sgotplt_jump_table_size + offplt; | |
4871 | unresolved_reloc = FALSE; | |
4872 | } | |
4873 | else if (r_type == ELF32_R_TYPE (rel->r_info)) | |
13ae64f3 | 4874 | { |
6de2ae4a L |
4875 | bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma |
4876 | + htab->elf.sgotplt->output_offset; | |
4877 | relocation = htab->elf.sgot->output_section->vma | |
4878 | + htab->elf.sgot->output_offset + off - g_o_t; | |
37e55690 JJ |
4879 | if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE) |
4880 | && tls_type == GOT_TLS_IE_BOTH) | |
4881 | relocation += 4; | |
4882 | if (r_type == R_386_TLS_IE) | |
8c37241b | 4883 | relocation += g_o_t; |
b34976b6 | 4884 | unresolved_reloc = FALSE; |
13ae64f3 | 4885 | } |
67a4f2b7 | 4886 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
13ae64f3 JJ |
4887 | { |
4888 | unsigned int val, type; | |
4889 | bfd_vma roff; | |
4890 | ||
4891 | /* GD->IE transition. */ | |
6eaa7fb5 L |
4892 | type = *(contents + rel->r_offset - 2); |
4893 | val = *(contents + rel->r_offset - 1); | |
13ae64f3 JJ |
4894 | if (type == 0x04) |
4895 | { | |
6eaa7fb5 L |
4896 | /* Change |
4897 | leal foo@tlsgd(,%ebx,1), %eax | |
4898 | call ___tls_get_addr@PLT | |
4899 | into: | |
4900 | movl %gs:0, %eax | |
4901 | subl $foo@gottpoff(%ebx), %eax. */ | |
13ae64f3 | 4902 | val >>= 3; |
142411ca | 4903 | roff = rel->r_offset - 3; |
13ae64f3 JJ |
4904 | } |
4905 | else | |
4906 | { | |
6eaa7fb5 L |
4907 | /* Change |
4908 | leal foo@tlsgd(%ebx), %eax | |
4909 | call ___tls_get_addr@PLT | |
4910 | nop | |
4911 | or | |
4912 | leal foo@tlsgd(%reg), %eax | |
4913 | call *___tls_get_addr@GOT(%reg) | |
4914 | which may be converted to | |
4915 | addr32 call ___tls_get_addr | |
4916 | into: | |
4917 | movl %gs:0, %eax; | |
4918 | subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 JJ |
4919 | roff = rel->r_offset - 2; |
4920 | } | |
4921 | memcpy (contents + roff, | |
4922 | "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12); | |
4923 | contents[roff + 7] = 0x80 | (val & 7); | |
37e55690 JJ |
4924 | /* If foo is used only with foo@gotntpoff(%reg) and |
4925 | foo@indntpoff, but not with foo@gottpoff(%reg), change | |
4926 | subl $foo@gottpoff(%reg), %eax | |
4927 | into: | |
4928 | addl $foo@gotntpoff(%reg), %eax. */ | |
ebcfb3c0 JJ |
4929 | if (tls_type == GOT_TLS_IE_POS) |
4930 | contents[roff + 6] = 0x03; | |
8c37241b | 4931 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4932 | htab->elf.sgot->output_section->vma |
4933 | + htab->elf.sgot->output_offset + off | |
4934 | - htab->elf.sgotplt->output_section->vma | |
4935 | - htab->elf.sgotplt->output_offset, | |
13ae64f3 | 4936 | contents + roff + 8); |
6eaa7fb5 | 4937 | /* Skip R_386_PLT32 and R_386_GOT32X. */ |
13ae64f3 | 4938 | rel++; |
60f2e42e | 4939 | wrel++; |
13ae64f3 JJ |
4940 | continue; |
4941 | } | |
67a4f2b7 AO |
4942 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
4943 | { | |
4944 | /* GDesc -> IE transition. | |
4945 | It's originally something like: | |
4946 | leal x@tlsdesc(%ebx), %eax | |
4947 | ||
4948 | Change it to: | |
142411ca | 4949 | movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax |
67a4f2b7 AO |
4950 | or: |
4951 | movl x@gottpoff(%ebx), %eax # before negl %eax | |
4952 | ||
4953 | Registers other than %eax may be set up here. */ | |
4954 | ||
67a4f2b7 AO |
4955 | bfd_vma roff; |
4956 | ||
4957 | /* First, make sure it's a leal adding ebx to a 32-bit | |
4958 | offset into any register, although it's probably | |
4959 | almost always going to be eax. */ | |
4960 | roff = rel->r_offset; | |
67a4f2b7 AO |
4961 | |
4962 | /* Now modify the instruction as appropriate. */ | |
4963 | /* To turn a leal into a movl in the form we use it, it | |
4964 | suffices to change the first byte from 0x8d to 0x8b. | |
4965 | aoliva FIXME: should we decide to keep the leal, all | |
4966 | we have to do is remove the statement below, and | |
4967 | adjust the relaxation of R_386_TLS_DESC_CALL. */ | |
4968 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
4969 | ||
4970 | if (tls_type == GOT_TLS_IE_BOTH) | |
4971 | off += 4; | |
4972 | ||
4973 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4974 | htab->elf.sgot->output_section->vma |
4975 | + htab->elf.sgot->output_offset + off | |
4976 | - htab->elf.sgotplt->output_section->vma | |
4977 | - htab->elf.sgotplt->output_offset, | |
67a4f2b7 AO |
4978 | contents + roff); |
4979 | continue; | |
4980 | } | |
4981 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
4982 | { | |
4983 | /* GDesc -> IE transition. | |
4984 | It's originally: | |
4985 | call *(%eax) | |
4986 | ||
4987 | Change it to: | |
142411ca | 4988 | xchg %ax,%ax |
67a4f2b7 AO |
4989 | or |
4990 | negl %eax | |
4991 | depending on how we transformed the TLS_GOTDESC above. | |
4992 | */ | |
4993 | ||
67a4f2b7 AO |
4994 | bfd_vma roff; |
4995 | ||
67a4f2b7 | 4996 | roff = rel->r_offset; |
67a4f2b7 AO |
4997 | |
4998 | /* Now modify the instruction as appropriate. */ | |
4999 | if (tls_type != GOT_TLS_IE_NEG) | |
5000 | { | |
10efb593 L |
5001 | /* xchg %ax,%ax */ |
5002 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
5003 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
5004 | } | |
5005 | else | |
5006 | { | |
5007 | /* negl %eax */ | |
5008 | bfd_put_8 (output_bfd, 0xf7, contents + roff); | |
5009 | bfd_put_8 (output_bfd, 0xd8, contents + roff + 1); | |
5010 | } | |
5011 | ||
5012 | continue; | |
5013 | } | |
5014 | else | |
5015 | BFD_ASSERT (FALSE); | |
13ae64f3 JJ |
5016 | break; |
5017 | ||
5018 | case R_386_TLS_LDM: | |
142411ca L |
5019 | if (! elf_i386_tls_transition (info, input_bfd, |
5020 | input_section, contents, | |
5021 | symtab_hdr, sym_hashes, | |
5022 | &r_type, GOT_UNKNOWN, rel, | |
bedfd056 | 5023 | relend, h, r_symndx, TRUE)) |
142411ca | 5024 | return FALSE; |
13ae64f3 | 5025 | |
142411ca L |
5026 | if (r_type != R_386_TLS_LDM) |
5027 | { | |
6eaa7fb5 L |
5028 | /* LD->LE transition. Change |
5029 | leal foo@tlsldm(%ebx) %eax | |
5030 | call ___tls_get_addr@PLT | |
5031 | into: | |
5032 | movl %gs:0, %eax | |
5033 | nop | |
5034 | leal 0(%esi,1), %esi | |
5035 | or change | |
5036 | leal foo@tlsldm(%reg) %eax | |
5037 | call *___tls_get_addr@GOT(%reg) | |
5038 | which may be converted to | |
5039 | addr32 call ___tls_get_addr | |
5040 | into: | |
5041 | movl %gs:0, %eax | |
5042 | leal 0(%esi), %esi */ | |
142411ca | 5043 | BFD_ASSERT (r_type == R_386_TLS_LE_32); |
6eaa7fb5 L |
5044 | if (*(contents + rel->r_offset + 4) == 0xff |
5045 | || *(contents + rel->r_offset + 4) == 0x67) | |
5046 | memcpy (contents + rel->r_offset - 2, | |
5047 | "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12); | |
5048 | else | |
5049 | memcpy (contents + rel->r_offset - 2, | |
5050 | "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11); | |
a3fadc9a | 5051 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 | 5052 | rel++; |
60f2e42e | 5053 | wrel++; |
13ae64f3 JJ |
5054 | continue; |
5055 | } | |
5056 | ||
6de2ae4a | 5057 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
5058 | abort (); |
5059 | ||
5060 | off = htab->tls_ldm_got.offset; | |
5061 | if (off & 1) | |
5062 | off &= ~1; | |
5063 | else | |
5064 | { | |
947216bf | 5065 | Elf_Internal_Rela outrel; |
13ae64f3 | 5066 | |
6de2ae4a | 5067 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
5068 | abort (); |
5069 | ||
6de2ae4a L |
5070 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5071 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 JJ |
5072 | |
5073 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 5074 | htab->elf.sgot->contents + off); |
13ae64f3 | 5075 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 5076 | htab->elf.sgot->contents + off + 4); |
13ae64f3 | 5077 | outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32); |
59d6ffb2 | 5078 | elf_append_rel (output_bfd, htab->elf.srelgot, &outrel); |
13ae64f3 JJ |
5079 | htab->tls_ldm_got.offset |= 1; |
5080 | } | |
6de2ae4a L |
5081 | relocation = htab->elf.sgot->output_section->vma |
5082 | + htab->elf.sgot->output_offset + off | |
5083 | - htab->elf.sgotplt->output_section->vma | |
5084 | - htab->elf.sgotplt->output_offset; | |
b34976b6 | 5085 | unresolved_reloc = FALSE; |
13ae64f3 JJ |
5086 | break; |
5087 | ||
5088 | case R_386_TLS_LDO_32: | |
0e1862bb L |
5089 | if (!bfd_link_executable (info) |
5090 | || (input_section->flags & SEC_CODE) == 0) | |
eb4ff4d6 | 5091 | relocation -= elf_i386_dtpoff_base (info); |
13ae64f3 JJ |
5092 | else |
5093 | /* When converting LDO to LE, we must negate. */ | |
eb4ff4d6 | 5094 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
5095 | break; |
5096 | ||
5097 | case R_386_TLS_LE_32: | |
13ae64f3 | 5098 | case R_386_TLS_LE: |
0e1862bb | 5099 | if (!bfd_link_executable (info)) |
37e55690 | 5100 | { |
947216bf | 5101 | Elf_Internal_Rela outrel; |
37e55690 | 5102 | asection *sreloc; |
37e55690 JJ |
5103 | |
5104 | outrel.r_offset = rel->r_offset | |
5105 | + input_section->output_section->vma | |
5106 | + input_section->output_offset; | |
5107 | if (h != NULL && h->dynindx != -1) | |
5108 | indx = h->dynindx; | |
5109 | else | |
5110 | indx = 0; | |
5111 | if (r_type == R_386_TLS_LE_32) | |
5112 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32); | |
5113 | else | |
5114 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); | |
5115 | sreloc = elf_section_data (input_section)->sreloc; | |
5116 | if (sreloc == NULL) | |
5117 | abort (); | |
59d6ffb2 | 5118 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
5119 | if (indx) |
5120 | continue; | |
5121 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 5122 | relocation = elf_i386_dtpoff_base (info) - relocation; |
37e55690 | 5123 | else |
eb4ff4d6 | 5124 | relocation -= elf_i386_dtpoff_base (info); |
37e55690 JJ |
5125 | } |
5126 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 5127 | relocation = elf_i386_tpoff (info, relocation); |
37e55690 | 5128 | else |
eb4ff4d6 | 5129 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
5130 | break; |
5131 | ||
252b5132 RH |
5132 | default: |
5133 | break; | |
5134 | } | |
5135 | ||
239e1f3a AM |
5136 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
5137 | because such sections are not SEC_ALLOC and thus ld.so will | |
5138 | not process them. */ | |
8c694914 | 5139 | if (unresolved_reloc |
239e1f3a | 5140 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
5141 | && h->def_dynamic) |
5142 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
5143 | rel->r_offset) != (bfd_vma) -1) | |
6a30718d JJ |
5144 | { |
5145 | (*_bfd_error_handler) | |
843fe662 | 5146 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
5147 | input_bfd, |
5148 | input_section, | |
6a30718d | 5149 | (long) rel->r_offset, |
843fe662 | 5150 | howto->name, |
6a30718d | 5151 | h->root.root.string); |
b34976b6 | 5152 | return FALSE; |
6a30718d | 5153 | } |
83be169b | 5154 | |
cbe950e9 | 5155 | do_relocation: |
252b5132 RH |
5156 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
5157 | contents, rel->r_offset, | |
55fd94b0 | 5158 | relocation, 0); |
252b5132 | 5159 | |
62d78908 | 5160 | check_relocation_error: |
cf5c0c5b | 5161 | if (r != bfd_reloc_ok) |
252b5132 | 5162 | { |
cf5c0c5b | 5163 | const char *name; |
ffb2e45b | 5164 | |
cf5c0c5b AM |
5165 | if (h != NULL) |
5166 | name = h->root.root.string; | |
5167 | else | |
5168 | { | |
5169 | name = bfd_elf_string_from_elf_section (input_bfd, | |
5170 | symtab_hdr->sh_link, | |
5171 | sym->st_name); | |
5172 | if (name == NULL) | |
b34976b6 | 5173 | return FALSE; |
cf5c0c5b AM |
5174 | if (*name == '\0') |
5175 | name = bfd_section_name (input_bfd, sec); | |
5176 | } | |
ffb2e45b | 5177 | |
cf5c0c5b | 5178 | if (r == bfd_reloc_overflow) |
1a72702b AM |
5179 | (*info->callbacks->reloc_overflow) |
5180 | (info, (h ? &h->root : NULL), name, howto->name, | |
5181 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
cf5c0c5b AM |
5182 | else |
5183 | { | |
5184 | (*_bfd_error_handler) | |
d003868e AM |
5185 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
5186 | input_bfd, input_section, | |
cf5c0c5b | 5187 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 5188 | return FALSE; |
cf5c0c5b | 5189 | } |
252b5132 | 5190 | } |
60f2e42e L |
5191 | |
5192 | if (wrel != rel) | |
5193 | *wrel = *rel; | |
5194 | } | |
5195 | ||
5196 | if (wrel != rel) | |
5197 | { | |
5198 | Elf_Internal_Shdr *rel_hdr; | |
5199 | size_t deleted = rel - wrel; | |
5200 | ||
5201 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
5202 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5203 | if (rel_hdr->sh_size == 0) | |
5204 | { | |
5205 | /* It is too late to remove an empty reloc section. Leave | |
5206 | one NONE reloc. | |
5207 | ??? What is wrong with an empty section??? */ | |
5208 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
5209 | deleted -= 1; | |
5210 | } | |
5211 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
5212 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5213 | input_section->reloc_count -= deleted; | |
252b5132 RH |
5214 | } |
5215 | ||
b34976b6 | 5216 | return TRUE; |
252b5132 RH |
5217 | } |
5218 | ||
5219 | /* Finish up dynamic symbol handling. We set the contents of various | |
5220 | dynamic sections here. */ | |
5221 | ||
b34976b6 | 5222 | static bfd_boolean |
55fd94b0 AM |
5223 | elf_i386_finish_dynamic_symbol (bfd *output_bfd, |
5224 | struct bfd_link_info *info, | |
5225 | struct elf_link_hash_entry *h, | |
5226 | Elf_Internal_Sym *sym) | |
252b5132 | 5227 | { |
6725bdbf | 5228 | struct elf_i386_link_hash_table *htab; |
25e762b9 RM |
5229 | unsigned plt_entry_size; |
5230 | const struct elf_i386_backend_data *abed; | |
dd7e64d4 | 5231 | struct elf_i386_link_hash_entry *eh; |
aec6b87e | 5232 | bfd_boolean local_undefweak; |
252b5132 | 5233 | |
6725bdbf | 5234 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
5235 | if (htab == NULL) |
5236 | return FALSE; | |
252b5132 | 5237 | |
25e762b9 RM |
5238 | abed = get_elf_i386_backend_data (output_bfd); |
5239 | plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd); | |
5240 | ||
dd7e64d4 L |
5241 | eh = (struct elf_i386_link_hash_entry *) h; |
5242 | ||
aec6b87e L |
5243 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
5244 | resolved undefined weak symbols in executable so that their | |
5245 | references have value 0 at run-time. */ | |
e62b9723 L |
5246 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
5247 | eh->has_got_reloc, | |
5248 | eh); | |
aec6b87e | 5249 | |
252b5132 RH |
5250 | if (h->plt.offset != (bfd_vma) -1) |
5251 | { | |
252b5132 RH |
5252 | bfd_vma plt_index; |
5253 | bfd_vma got_offset; | |
947216bf AM |
5254 | Elf_Internal_Rela rel; |
5255 | bfd_byte *loc; | |
cbe950e9 L |
5256 | asection *plt, *gotplt, *relplt; |
5257 | ||
5258 | /* When building a static executable, use .iplt, .igot.plt and | |
5259 | .rel.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 5260 | if (htab->elf.splt != NULL) |
cbe950e9 | 5261 | { |
6de2ae4a L |
5262 | plt = htab->elf.splt; |
5263 | gotplt = htab->elf.sgotplt; | |
5264 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
5265 | } |
5266 | else | |
5267 | { | |
6de2ae4a L |
5268 | plt = htab->elf.iplt; |
5269 | gotplt = htab->elf.igotplt; | |
5270 | relplt = htab->elf.irelplt; | |
cbe950e9 | 5271 | } |
252b5132 RH |
5272 | |
5273 | /* This symbol has an entry in the procedure linkage table. Set | |
5274 | it up. */ | |
5275 | ||
cbe950e9 | 5276 | if ((h->dynindx == -1 |
aec6b87e | 5277 | && !local_undefweak |
0e1862bb | 5278 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
5279 | && h->def_regular |
5280 | && h->type == STT_GNU_IFUNC)) | |
5281 | || plt == NULL | |
5282 | || gotplt == NULL | |
5283 | || relplt == NULL) | |
cec7f46a | 5284 | abort (); |
252b5132 RH |
5285 | |
5286 | /* Get the index in the procedure linkage table which | |
5287 | corresponds to this symbol. This is the index of this symbol | |
5288 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 5289 | first entry in the procedure linkage table is reserved. |
252b5132 | 5290 | |
cbe950e9 | 5291 | Get the offset into the .got table of the entry that |
252b5132 | 5292 | corresponds to this function. Each .got entry is 4 bytes. |
cbe950e9 | 5293 | The first three are reserved. |
6bbec505 | 5294 | |
cbe950e9 L |
5295 | For static executables, we don't reserve anything. */ |
5296 | ||
6de2ae4a | 5297 | if (plt == htab->elf.splt) |
cbe950e9 | 5298 | { |
e1f98742 L |
5299 | got_offset = h->plt.offset / plt_entry_size - 1; |
5300 | got_offset = (got_offset + 3) * 4; | |
cbe950e9 L |
5301 | } |
5302 | else | |
5303 | { | |
e1f98742 L |
5304 | got_offset = h->plt.offset / plt_entry_size; |
5305 | got_offset = got_offset * 4; | |
cbe950e9 | 5306 | } |
252b5132 RH |
5307 | |
5308 | /* Fill in the entry in the procedure linkage table. */ | |
0e1862bb | 5309 | if (! bfd_link_pic (info)) |
252b5132 | 5310 | { |
25e762b9 RM |
5311 | memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry, |
5312 | abed->plt->plt_entry_size); | |
252b5132 | 5313 | bfd_put_32 (output_bfd, |
cbe950e9 L |
5314 | (gotplt->output_section->vma |
5315 | + gotplt->output_offset | |
252b5132 | 5316 | + got_offset), |
25e762b9 RM |
5317 | plt->contents + h->plt.offset |
5318 | + abed->plt->plt_got_offset); | |
eac338cf | 5319 | |
25e762b9 | 5320 | if (abed->is_vxworks) |
eac338cf PB |
5321 | { |
5322 | int s, k, reloc_index; | |
5323 | ||
5324 | /* Create the R_386_32 relocation referencing the GOT | |
5325 | for this PLT entry. */ | |
5326 | ||
5327 | /* S: Current slot number (zero-based). */ | |
25e762b9 RM |
5328 | s = ((h->plt.offset - abed->plt->plt_entry_size) |
5329 | / abed->plt->plt_entry_size); | |
eac338cf | 5330 | /* K: Number of relocations for PLTResolve. */ |
0e1862bb | 5331 | if (bfd_link_pic (info)) |
eac338cf PB |
5332 | k = PLTRESOLVE_RELOCS_SHLIB; |
5333 | else | |
5334 | k = PLTRESOLVE_RELOCS; | |
5335 | /* Skip the PLTresolve relocations, and the relocations for | |
5336 | the other PLT slots. */ | |
5337 | reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS; | |
5338 | loc = (htab->srelplt2->contents + reloc_index | |
5339 | * sizeof (Elf32_External_Rel)); | |
5340 | ||
6de2ae4a L |
5341 | rel.r_offset = (htab->elf.splt->output_section->vma |
5342 | + htab->elf.splt->output_offset | |
eac338cf | 5343 | + h->plt.offset + 2), |
7325306f | 5344 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5345 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
5346 | ||
5347 | /* Create the R_386_32 relocation referencing the beginning of | |
5348 | the PLT for this GOT entry. */ | |
6de2ae4a L |
5349 | rel.r_offset = (htab->elf.sgotplt->output_section->vma |
5350 | + htab->elf.sgotplt->output_offset | |
eac338cf | 5351 | + got_offset); |
7325306f | 5352 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf | 5353 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
13ca3149 | 5354 | loc + sizeof (Elf32_External_Rel)); |
eac338cf | 5355 | } |
252b5132 RH |
5356 | } |
5357 | else | |
5358 | { | |
25e762b9 RM |
5359 | memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry, |
5360 | abed->plt->plt_entry_size); | |
252b5132 | 5361 | bfd_put_32 (output_bfd, got_offset, |
25e762b9 RM |
5362 | plt->contents + h->plt.offset |
5363 | + abed->plt->plt_got_offset); | |
252b5132 RH |
5364 | } |
5365 | ||
aec6b87e L |
5366 | /* Fill in the entry in the global offset table. Leave the entry |
5367 | as zero for undefined weak symbol in PIE. No PLT relocation | |
5368 | against undefined weak symbol in PIE. */ | |
5369 | if (!local_undefweak) | |
cbe950e9 | 5370 | { |
cbe950e9 | 5371 | bfd_put_32 (output_bfd, |
aec6b87e L |
5372 | (plt->output_section->vma |
5373 | + plt->output_offset | |
5374 | + h->plt.offset | |
5375 | + abed->plt->plt_lazy_offset), | |
cbe950e9 | 5376 | gotplt->contents + got_offset); |
252b5132 | 5377 | |
aec6b87e L |
5378 | /* Fill in the entry in the .rel.plt section. */ |
5379 | rel.r_offset = (gotplt->output_section->vma | |
5380 | + gotplt->output_offset | |
5381 | + got_offset); | |
5382 | if (h->dynindx == -1 | |
5383 | || ((bfd_link_executable (info) | |
5384 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
5385 | && h->def_regular | |
5386 | && h->type == STT_GNU_IFUNC)) | |
5387 | { | |
5388 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
5389 | R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend | |
5390 | in the .got.plt section. */ | |
5391 | bfd_put_32 (output_bfd, | |
5392 | (h->root.u.def.value | |
5393 | + h->root.u.def.section->output_section->vma | |
5394 | + h->root.u.def.section->output_offset), | |
5395 | gotplt->contents + got_offset); | |
5396 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
5397 | /* R_386_IRELATIVE comes last. */ | |
5398 | plt_index = htab->next_irelative_index--; | |
5399 | } | |
5400 | else | |
5401 | { | |
5402 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
5403 | plt_index = htab->next_jump_slot_index++; | |
5404 | } | |
5405 | ||
5406 | loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel); | |
5407 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
5408 | ||
5409 | /* Don't fill PLT entry for static executables. */ | |
5410 | if (plt == htab->elf.splt) | |
5411 | { | |
5412 | bfd_put_32 (output_bfd, | |
5413 | plt_index * sizeof (Elf32_External_Rel), | |
5414 | plt->contents + h->plt.offset | |
5415 | + abed->plt->plt_reloc_offset); | |
5416 | bfd_put_32 (output_bfd, - (h->plt.offset | |
5417 | + abed->plt->plt_plt_offset + 4), | |
5418 | plt->contents + h->plt.offset | |
5419 | + abed->plt->plt_plt_offset); | |
5420 | } | |
e1f98742 | 5421 | } |
dd7e64d4 L |
5422 | } |
5423 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
5424 | { | |
5425 | bfd_vma got_offset, plt_offset; | |
5426 | asection *plt, *got, *gotplt; | |
5427 | const bfd_byte *got_plt_entry; | |
5428 | ||
5429 | /* Offset of displacement of the indirect jump. */ | |
5430 | bfd_vma plt_got_offset = 2; | |
e1f98742 | 5431 | |
dd7e64d4 L |
5432 | /* Set the entry in the GOT procedure linkage table. */ |
5433 | plt = htab->plt_got; | |
5434 | got = htab->elf.sgot; | |
5435 | gotplt = htab->elf.sgotplt; | |
5436 | got_offset = h->got.offset; | |
5437 | ||
5438 | if (got_offset == (bfd_vma) -1 | |
5439 | || plt == NULL | |
5440 | || got == NULL | |
5441 | || gotplt == NULL) | |
5442 | abort (); | |
5443 | ||
5444 | /* Fill in the entry in the GOT procedure linkage table. */ | |
0e1862bb | 5445 | if (! bfd_link_pic (info)) |
252b5132 | 5446 | { |
dd7e64d4 L |
5447 | got_plt_entry = elf_i386_got_plt_entry; |
5448 | got_offset += got->output_section->vma + got->output_offset; | |
252b5132 | 5449 | } |
dd7e64d4 L |
5450 | else |
5451 | { | |
5452 | got_plt_entry = elf_i386_pic_got_plt_entry; | |
5453 | got_offset += (got->output_section->vma | |
5454 | + got->output_offset | |
5455 | - gotplt->output_section->vma | |
5456 | - gotplt->output_offset); | |
5457 | } | |
5458 | ||
5459 | plt_offset = eh->plt_got.offset; | |
5460 | memcpy (plt->contents + plt_offset, got_plt_entry, | |
5461 | sizeof (elf_i386_got_plt_entry)); | |
5462 | bfd_put_32 (output_bfd, got_offset, | |
5463 | plt->contents + plt_offset + plt_got_offset); | |
5464 | } | |
5465 | ||
aec6b87e L |
5466 | if (!local_undefweak |
5467 | && !h->def_regular | |
dd7e64d4 L |
5468 | && (h->plt.offset != (bfd_vma) -1 |
5469 | || eh->plt_got.offset != (bfd_vma) -1)) | |
5470 | { | |
5471 | /* Mark the symbol as undefined, rather than as defined in | |
5472 | the .plt section. Leave the value if there were any | |
5473 | relocations where pointer equality matters (this is a clue | |
5474 | for the dynamic linker, to make function pointer | |
5475 | comparisons work between an application and shared | |
5476 | library), otherwise set it to zero. If a function is only | |
5477 | called from a binary, there is no need to slow down | |
5478 | shared libraries because of that. */ | |
5479 | sym->st_shndx = SHN_UNDEF; | |
5480 | if (!h->pointer_equality_needed) | |
5481 | sym->st_value = 0; | |
252b5132 RH |
5482 | } |
5483 | ||
aec6b87e L |
5484 | /* Don't generate dynamic GOT relocation against undefined weak |
5485 | symbol in executable. */ | |
13ae64f3 | 5486 | if (h->got.offset != (bfd_vma) -1 |
67a4f2b7 | 5487 | && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type) |
aec6b87e L |
5488 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0 |
5489 | && !local_undefweak) | |
252b5132 | 5490 | { |
947216bf | 5491 | Elf_Internal_Rela rel; |
233cc9c1 | 5492 | asection *relgot = htab->elf.srelgot; |
252b5132 RH |
5493 | |
5494 | /* This symbol has an entry in the global offset table. Set it | |
5495 | up. */ | |
5496 | ||
6de2ae4a | 5497 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
ffb2e45b | 5498 | abort (); |
252b5132 | 5499 | |
6de2ae4a L |
5500 | rel.r_offset = (htab->elf.sgot->output_section->vma |
5501 | + htab->elf.sgot->output_offset | |
dc810e39 | 5502 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 5503 | |
dd5724d5 AM |
5504 | /* If this is a static link, or it is a -Bsymbolic link and the |
5505 | symbol is defined locally or was forced to be local because | |
5506 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
5507 | The entry in the global offset table will already have been |
5508 | initialized in the relocate_section function. */ | |
710ab287 | 5509 | if (h->def_regular |
0018b0a3 L |
5510 | && h->type == STT_GNU_IFUNC) |
5511 | { | |
233cc9c1 L |
5512 | if (h->plt.offset == (bfd_vma) -1) |
5513 | { | |
5514 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
5515 | if (htab->elf.splt == NULL) | |
5516 | { | |
5517 | /* use .rel[a].iplt section to store .got relocations | |
5518 | in static executable. */ | |
5519 | relgot = htab->elf.irelplt; | |
5520 | } | |
5521 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
5522 | { | |
5523 | bfd_put_32 (output_bfd, | |
5524 | (h->root.u.def.value | |
5525 | + h->root.u.def.section->output_section->vma | |
5526 | + h->root.u.def.section->output_offset), | |
5527 | htab->elf.sgot->contents + h->got.offset); | |
5528 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
5529 | } | |
5530 | else | |
5531 | goto do_glob_dat; | |
5532 | } | |
5533 | else if (bfd_link_pic (info)) | |
710ab287 L |
5534 | { |
5535 | /* Generate R_386_GLOB_DAT. */ | |
5536 | goto do_glob_dat; | |
5537 | } | |
5538 | else | |
5539 | { | |
cd2b2c10 L |
5540 | asection *plt; |
5541 | ||
710ab287 L |
5542 | if (!h->pointer_equality_needed) |
5543 | abort (); | |
5544 | ||
5545 | /* For non-shared object, we can't use .got.plt, which | |
5546 | contains the real function addres if we need pointer | |
5547 | equality. We load the GOT entry with the PLT entry. */ | |
cd2b2c10 | 5548 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
5549 | bfd_put_32 (output_bfd, |
5550 | (plt->output_section->vma | |
5551 | + plt->output_offset + h->plt.offset), | |
6de2ae4a | 5552 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
5553 | return TRUE; |
5554 | } | |
0018b0a3 | 5555 | } |
0e1862bb | 5556 | else if (bfd_link_pic (info) |
0018b0a3 | 5557 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
dd5724d5 | 5558 | { |
6725bdbf | 5559 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 AM |
5560 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
5561 | } | |
252b5132 RH |
5562 | else |
5563 | { | |
dd5724d5 | 5564 | BFD_ASSERT((h->got.offset & 1) == 0); |
710ab287 | 5565 | do_glob_dat: |
6725bdbf | 5566 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 5567 | htab->elf.sgot->contents + h->got.offset); |
252b5132 RH |
5568 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
5569 | } | |
5570 | ||
233cc9c1 | 5571 | elf_append_rel (output_bfd, relgot, &rel); |
252b5132 RH |
5572 | } |
5573 | ||
f5385ebf | 5574 | if (h->needs_copy) |
252b5132 | 5575 | { |
947216bf | 5576 | Elf_Internal_Rela rel; |
252b5132 RH |
5577 | |
5578 | /* This symbol needs a copy reloc. Set it up. */ | |
5579 | ||
ffb2e45b AM |
5580 | if (h->dynindx == -1 |
5581 | || (h->root.type != bfd_link_hash_defined | |
5582 | && h->root.type != bfd_link_hash_defweak) | |
5583 | || htab->srelbss == NULL) | |
5584 | abort (); | |
252b5132 RH |
5585 | |
5586 | rel.r_offset = (h->root.u.def.value | |
5587 | + h->root.u.def.section->output_section->vma | |
5588 | + h->root.u.def.section->output_offset); | |
5589 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
59d6ffb2 | 5590 | elf_append_rel (output_bfd, htab->srelbss, &rel); |
252b5132 RH |
5591 | } |
5592 | ||
b34976b6 | 5593 | return TRUE; |
252b5132 RH |
5594 | } |
5595 | ||
c25bc9fc L |
5596 | /* Finish up local dynamic symbol handling. We set the contents of |
5597 | various dynamic sections here. */ | |
5598 | ||
5599 | static bfd_boolean | |
5600 | elf_i386_finish_local_dynamic_symbol (void **slot, void *inf) | |
5601 | { | |
5602 | struct elf_link_hash_entry *h | |
5603 | = (struct elf_link_hash_entry *) *slot; | |
5604 | struct bfd_link_info *info | |
23209a78 | 5605 | = (struct bfd_link_info *) inf; |
c25bc9fc L |
5606 | |
5607 | return elf_i386_finish_dynamic_symbol (info->output_bfd, info, | |
5608 | h, NULL); | |
5609 | } | |
5610 | ||
aec6b87e L |
5611 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
5612 | here since undefined weak symbol may not be dynamic and may not be | |
5613 | called for elf_i386_finish_dynamic_symbol. */ | |
5614 | ||
5615 | static bfd_boolean | |
5616 | elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
5617 | void *inf) | |
5618 | { | |
5619 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
5620 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
5621 | ||
5622 | if (h->root.type != bfd_link_hash_undefweak | |
5623 | || h->dynindx != -1) | |
5624 | return TRUE; | |
5625 | ||
5626 | return elf_i386_finish_dynamic_symbol (info->output_bfd, | |
5627 | info, h, NULL); | |
5628 | } | |
5629 | ||
38701953 AM |
5630 | /* Used to decide how to sort relocs in an optimal manner for the |
5631 | dynamic linker, before writing them out. */ | |
5632 | ||
5633 | static enum elf_reloc_type_class | |
cae1fbbb | 5634 | elf_i386_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
5635 | const asection *rel_sec ATTRIBUTE_UNUSED, |
5636 | const Elf_Internal_Rela *rela) | |
38701953 | 5637 | { |
cae1fbbb L |
5638 | bfd *abfd = info->output_bfd; |
5639 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
5640 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
cae1fbbb | 5641 | |
d9e3b590 L |
5642 | if (htab->dynsym != NULL |
5643 | && htab->dynsym->contents != NULL) | |
5644 | { | |
5645 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
5646 | dynamic symbols. */ | |
5647 | unsigned long r_symndx = ELF32_R_SYM (rela->r_info); | |
c428ce9d L |
5648 | if (r_symndx != STN_UNDEF) |
5649 | { | |
5650 | Elf_Internal_Sym sym; | |
5651 | if (!bed->s->swap_symbol_in (abfd, | |
5652 | (htab->dynsym->contents | |
5653 | + r_symndx * sizeof (Elf32_External_Sym)), | |
5654 | 0, &sym)) | |
5655 | abort (); | |
d9e3b590 | 5656 | |
c428ce9d L |
5657 | if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
5658 | return reloc_class_ifunc; | |
5659 | } | |
d9e3b590 | 5660 | } |
cae1fbbb | 5661 | |
55fd94b0 | 5662 | switch (ELF32_R_TYPE (rela->r_info)) |
38701953 | 5663 | { |
c428ce9d L |
5664 | case R_386_IRELATIVE: |
5665 | return reloc_class_ifunc; | |
38701953 AM |
5666 | case R_386_RELATIVE: |
5667 | return reloc_class_relative; | |
5668 | case R_386_JUMP_SLOT: | |
5669 | return reloc_class_plt; | |
5670 | case R_386_COPY: | |
5671 | return reloc_class_copy; | |
5672 | default: | |
5673 | return reloc_class_normal; | |
5674 | } | |
5675 | } | |
5676 | ||
252b5132 RH |
5677 | /* Finish up the dynamic sections. */ |
5678 | ||
b34976b6 | 5679 | static bfd_boolean |
55fd94b0 AM |
5680 | elf_i386_finish_dynamic_sections (bfd *output_bfd, |
5681 | struct bfd_link_info *info) | |
252b5132 | 5682 | { |
6725bdbf | 5683 | struct elf_i386_link_hash_table *htab; |
252b5132 | 5684 | bfd *dynobj; |
252b5132 | 5685 | asection *sdyn; |
25e762b9 | 5686 | const struct elf_i386_backend_data *abed; |
252b5132 | 5687 | |
6725bdbf | 5688 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
5689 | if (htab == NULL) |
5690 | return FALSE; | |
5691 | ||
ebe50bae | 5692 | dynobj = htab->elf.dynobj; |
3d4d4302 | 5693 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
25e762b9 | 5694 | abed = get_elf_i386_backend_data (output_bfd); |
252b5132 | 5695 | |
ebe50bae | 5696 | if (htab->elf.dynamic_sections_created) |
252b5132 | 5697 | { |
252b5132 RH |
5698 | Elf32_External_Dyn *dyncon, *dynconend; |
5699 | ||
6de2ae4a | 5700 | if (sdyn == NULL || htab->elf.sgot == NULL) |
ffb2e45b | 5701 | abort (); |
252b5132 RH |
5702 | |
5703 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 5704 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
252b5132 RH |
5705 | for (; dyncon < dynconend; dyncon++) |
5706 | { | |
5707 | Elf_Internal_Dyn dyn; | |
51b64d56 | 5708 | asection *s; |
252b5132 RH |
5709 | |
5710 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
5711 | ||
5712 | switch (dyn.d_tag) | |
5713 | { | |
5714 | default: | |
25e762b9 RM |
5715 | if (abed->is_vxworks |
5716 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) | |
7a2b07ff | 5717 | break; |
0ac8d2ca | 5718 | continue; |
252b5132 RH |
5719 | |
5720 | case DT_PLTGOT: | |
6de2ae4a | 5721 | s = htab->elf.sgotplt; |
8c37241b | 5722 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
6725bdbf AM |
5723 | break; |
5724 | ||
252b5132 | 5725 | case DT_JMPREL: |
6de2ae4a | 5726 | s = htab->elf.srelplt; |
6348e046 | 5727 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
252b5132 RH |
5728 | break; |
5729 | ||
5730 | case DT_PLTRELSZ: | |
6de2ae4a | 5731 | s = htab->elf.srelplt; |
eea6121a | 5732 | dyn.d_un.d_val = s->size; |
252b5132 RH |
5733 | break; |
5734 | ||
5735 | case DT_RELSZ: | |
5736 | /* My reading of the SVR4 ABI indicates that the | |
5737 | procedure linkage table relocs (DT_JMPREL) should be | |
5738 | included in the overall relocs (DT_REL). This is | |
5739 | what Solaris does. However, UnixWare can not handle | |
5740 | that case. Therefore, we override the DT_RELSZ entry | |
6348e046 | 5741 | here to make it not include the JMPREL relocs. */ |
6de2ae4a | 5742 | s = htab->elf.srelplt; |
6348e046 AM |
5743 | if (s == NULL) |
5744 | continue; | |
eea6121a | 5745 | dyn.d_un.d_val -= s->size; |
6348e046 AM |
5746 | break; |
5747 | ||
5748 | case DT_REL: | |
5749 | /* We may not be using the standard ELF linker script. | |
5750 | If .rel.plt is the first .rel section, we adjust | |
5751 | DT_REL to not include it. */ | |
6de2ae4a | 5752 | s = htab->elf.srelplt; |
6348e046 AM |
5753 | if (s == NULL) |
5754 | continue; | |
5755 | if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset) | |
5756 | continue; | |
eea6121a | 5757 | dyn.d_un.d_ptr += s->size; |
252b5132 RH |
5758 | break; |
5759 | } | |
0ac8d2ca AM |
5760 | |
5761 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
252b5132 RH |
5762 | } |
5763 | ||
5764 | /* Fill in the first entry in the procedure linkage table. */ | |
6de2ae4a | 5765 | if (htab->elf.splt && htab->elf.splt->size > 0) |
252b5132 | 5766 | { |
0e1862bb | 5767 | if (bfd_link_pic (info)) |
eac338cf | 5768 | { |
25e762b9 RM |
5769 | memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry, |
5770 | abed->plt->plt0_entry_size); | |
5771 | memset (htab->elf.splt->contents + abed->plt->plt0_entry_size, | |
5772 | abed->plt0_pad_byte, | |
5773 | abed->plt->plt_entry_size - abed->plt->plt0_entry_size); | |
eac338cf | 5774 | } |
252b5132 RH |
5775 | else |
5776 | { | |
25e762b9 RM |
5777 | memcpy (htab->elf.splt->contents, abed->plt->plt0_entry, |
5778 | abed->plt->plt0_entry_size); | |
5779 | memset (htab->elf.splt->contents + abed->plt->plt0_entry_size, | |
5780 | abed->plt0_pad_byte, | |
5781 | abed->plt->plt_entry_size - abed->plt->plt0_entry_size); | |
252b5132 | 5782 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5783 | (htab->elf.sgotplt->output_section->vma |
5784 | + htab->elf.sgotplt->output_offset | |
6725bdbf | 5785 | + 4), |
25e762b9 RM |
5786 | htab->elf.splt->contents |
5787 | + abed->plt->plt0_got1_offset); | |
252b5132 | 5788 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5789 | (htab->elf.sgotplt->output_section->vma |
5790 | + htab->elf.sgotplt->output_offset | |
6725bdbf | 5791 | + 8), |
25e762b9 RM |
5792 | htab->elf.splt->contents |
5793 | + abed->plt->plt0_got2_offset); | |
eac338cf | 5794 | |
25e762b9 | 5795 | if (abed->is_vxworks) |
eac338cf PB |
5796 | { |
5797 | Elf_Internal_Rela rel; | |
7325306f | 5798 | |
eac338cf PB |
5799 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4. |
5800 | On IA32 we use REL relocations so the addend goes in | |
5801 | the PLT directly. */ | |
6de2ae4a L |
5802 | rel.r_offset = (htab->elf.splt->output_section->vma |
5803 | + htab->elf.splt->output_offset | |
25e762b9 | 5804 | + abed->plt->plt0_got1_offset); |
7325306f | 5805 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5806 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
5807 | htab->srelplt2->contents); | |
5808 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
6de2ae4a L |
5809 | rel.r_offset = (htab->elf.splt->output_section->vma |
5810 | + htab->elf.splt->output_offset | |
25e762b9 | 5811 | + abed->plt->plt0_got2_offset); |
7325306f | 5812 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5813 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
5814 | htab->srelplt2->contents + | |
5815 | sizeof (Elf32_External_Rel)); | |
5816 | } | |
252b5132 RH |
5817 | } |
5818 | ||
5819 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
5820 | really seem like the right value. */ | |
6de2ae4a | 5821 | elf_section_data (htab->elf.splt->output_section) |
6725bdbf | 5822 | ->this_hdr.sh_entsize = 4; |
eac338cf PB |
5823 | |
5824 | /* Correct the .rel.plt.unloaded relocations. */ | |
0e1862bb | 5825 | if (abed->is_vxworks && !bfd_link_pic (info)) |
eac338cf | 5826 | { |
25e762b9 RM |
5827 | int num_plts = (htab->elf.splt->size |
5828 | / abed->plt->plt_entry_size) - 1; | |
4c9b0de6 | 5829 | unsigned char *p; |
eac338cf PB |
5830 | |
5831 | p = htab->srelplt2->contents; | |
0e1862bb | 5832 | if (bfd_link_pic (info)) |
eac338cf PB |
5833 | p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel); |
5834 | else | |
5835 | p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel); | |
5836 | ||
5837 | for (; num_plts; num_plts--) | |
5838 | { | |
5839 | Elf_Internal_Rela rel; | |
5840 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 5841 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5842 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
5843 | p += sizeof (Elf32_External_Rel); | |
5844 | ||
5845 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 5846 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf PB |
5847 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
5848 | p += sizeof (Elf32_External_Rel); | |
5849 | } | |
5850 | } | |
252b5132 RH |
5851 | } |
5852 | } | |
5853 | ||
6de2ae4a | 5854 | if (htab->elf.sgotplt) |
252b5132 | 5855 | { |
56d4289c L |
5856 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
5857 | { | |
5858 | (*_bfd_error_handler) | |
5859 | (_("discarded output section: `%A'"), htab->elf.sgotplt); | |
5860 | return FALSE; | |
5861 | } | |
5862 | ||
12d0ee4a | 5863 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 5864 | if (htab->elf.sgotplt->size > 0) |
12d0ee4a AM |
5865 | { |
5866 | bfd_put_32 (output_bfd, | |
55fd94b0 | 5867 | (sdyn == NULL ? 0 |
12d0ee4a | 5868 | : sdyn->output_section->vma + sdyn->output_offset), |
6de2ae4a L |
5869 | htab->elf.sgotplt->contents); |
5870 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4); | |
5871 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8); | |
12d0ee4a | 5872 | } |
252b5132 | 5873 | |
6de2ae4a | 5874 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4; |
12d0ee4a | 5875 | } |
8c37241b | 5876 | |
e41b3a13 | 5877 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
5878 | if (htab->plt_eh_frame != NULL |
5879 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
5880 | { |
5881 | if (htab->elf.splt != NULL | |
5882 | && htab->elf.splt->size != 0 | |
5883 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
5884 | && htab->elf.splt->output_section != NULL | |
5885 | && htab->plt_eh_frame->output_section != NULL) | |
5886 | { | |
5887 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
5888 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
5889 | + htab->plt_eh_frame->output_offset | |
5890 | + PLT_FDE_START_OFFSET; | |
5891 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5892 | htab->plt_eh_frame->contents | |
5893 | + PLT_FDE_START_OFFSET); | |
5894 | } | |
5895 | if (htab->plt_eh_frame->sec_info_type | |
dbaa2011 | 5896 | == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
5897 | { |
5898 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5899 | htab->plt_eh_frame, | |
5900 | htab->plt_eh_frame->contents)) | |
5901 | return FALSE; | |
5902 | } | |
5903 | } | |
5904 | ||
6de2ae4a L |
5905 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
5906 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4; | |
8c37241b | 5907 | |
aec6b87e L |
5908 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
5909 | if (bfd_link_pie (info)) | |
5910 | bfd_hash_traverse (&info->hash->table, | |
5911 | elf_i386_pie_finish_undefweak_symbol, | |
5912 | info); | |
5913 | ||
b34976b6 | 5914 | return TRUE; |
252b5132 RH |
5915 | } |
5916 | ||
233cc9c1 L |
5917 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
5918 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
5919 | It has to be done before elf_link_sort_relocs is called so that | |
5920 | dynamic relocations are properly sorted. */ | |
5921 | ||
5922 | static bfd_boolean | |
5923 | elf_i386_output_arch_local_syms | |
5924 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
5925 | struct bfd_link_info *info, | |
5926 | void *flaginfo ATTRIBUTE_UNUSED, | |
5927 | int (*func) (void *, const char *, | |
5928 | Elf_Internal_Sym *, | |
5929 | asection *, | |
5930 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
5931 | { | |
5932 | struct elf_i386_link_hash_table *htab = elf_i386_hash_table (info); | |
5933 | if (htab == NULL) | |
5934 | return FALSE; | |
5935 | ||
5936 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
5937 | htab_traverse (htab->loc_hash_table, | |
5938 | elf_i386_finish_local_dynamic_symbol, | |
5939 | info); | |
5940 | ||
5941 | return TRUE; | |
5942 | } | |
5943 | ||
3972882e | 5944 | /* Return an array of PLT entry symbol values. */ |
4c45e5c9 | 5945 | |
3972882e L |
5946 | static bfd_vma * |
5947 | elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt, | |
5948 | asection *relplt) | |
4c45e5c9 | 5949 | { |
3972882e L |
5950 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
5951 | arelent *p; | |
5952 | long count, i; | |
5953 | bfd_vma *plt_sym_val; | |
144bed8d | 5954 | bfd_vma plt_offset; |
3972882e L |
5955 | bfd_byte *plt_contents; |
5956 | const struct elf_i386_backend_data *bed | |
5957 | = get_elf_i386_backend_data (abfd); | |
5958 | Elf_Internal_Shdr *hdr; | |
5959 | ||
5960 | /* Get the .plt section contents. */ | |
5961 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
5962 | if (plt_contents == NULL) | |
5963 | return NULL; | |
5964 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
5965 | plt_contents, 0, plt->size)) | |
5966 | { | |
5967 | bad_return: | |
5968 | free (plt_contents); | |
5969 | return NULL; | |
5970 | } | |
144bed8d | 5971 | |
3972882e L |
5972 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
5973 | if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) | |
5974 | goto bad_return; | |
144bed8d | 5975 | |
3972882e L |
5976 | hdr = &elf_section_data (relplt)->this_hdr; |
5977 | count = relplt->size / hdr->sh_entsize; | |
5978 | ||
5979 | plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count); | |
5980 | if (plt_sym_val == NULL) | |
5981 | goto bad_return; | |
cca5b8b6 | 5982 | |
35181b3e | 5983 | for (i = 0; i < count; i++) |
3972882e | 5984 | plt_sym_val[i] = -1; |
cca5b8b6 | 5985 | |
3972882e L |
5986 | plt_offset = bed->plt->plt_entry_size; |
5987 | p = relplt->relocation; | |
5988 | for (i = 0; i < count; i++, p++) | |
144bed8d | 5989 | { |
3972882e L |
5990 | long reloc_index; |
5991 | ||
6f25f223 | 5992 | /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */ |
533d0af0 | 5993 | if (p->howto == NULL) |
6f25f223 | 5994 | continue; |
533d0af0 L |
5995 | |
5996 | if (p->howto->type != R_386_JUMP_SLOT | |
5997 | && p->howto->type != R_386_IRELATIVE) | |
3972882e L |
5998 | continue; |
5999 | ||
6000 | reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset | |
6001 | + bed->plt->plt_reloc_offset)); | |
6002 | reloc_index /= sizeof (Elf32_External_Rel); | |
ec1f73bb AM |
6003 | if (reloc_index < count) |
6004 | plt_sym_val[reloc_index] = plt->vma + plt_offset; | |
6005 | ||
144bed8d | 6006 | plt_offset += bed->plt->plt_entry_size; |
fca6ae69 L |
6007 | |
6008 | /* PR binutils/18437: Skip extra relocations in the .rel.plt | |
6009 | section. */ | |
6010 | if (plt_offset >= plt->size) | |
6011 | break; | |
144bed8d L |
6012 | } |
6013 | ||
3972882e L |
6014 | free (plt_contents); |
6015 | ||
6016 | return plt_sym_val; | |
6017 | } | |
6018 | ||
6019 | /* Similar to _bfd_elf_get_synthetic_symtab. */ | |
6020 | ||
6021 | static long | |
6022 | elf_i386_get_synthetic_symtab (bfd *abfd, | |
6023 | long symcount, | |
6024 | asymbol **syms, | |
6025 | long dynsymcount, | |
6026 | asymbol **dynsyms, | |
6027 | asymbol **ret) | |
6028 | { | |
6029 | asection *plt = bfd_get_section_by_name (abfd, ".plt"); | |
6030 | return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms, | |
6031 | dynsymcount, dynsyms, ret, | |
6032 | plt, | |
6033 | elf_i386_get_plt_sym_val); | |
4c45e5c9 JJ |
6034 | } |
6035 | ||
fdc90cb4 JJ |
6036 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
6037 | ||
6038 | static bfd_boolean | |
6039 | elf_i386_hash_symbol (struct elf_link_hash_entry *h) | |
6040 | { | |
6041 | if (h->plt.offset != (bfd_vma) -1 | |
6042 | && !h->def_regular | |
6043 | && !h->pointer_equality_needed) | |
6044 | return FALSE; | |
6045 | ||
6046 | return _bfd_elf_hash_symbol (h); | |
6047 | } | |
4c45e5c9 | 6048 | |
6d00b590 | 6049 | #define TARGET_LITTLE_SYM i386_elf32_vec |
252b5132 RH |
6050 | #define TARGET_LITTLE_NAME "elf32-i386" |
6051 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 6052 | #define ELF_TARGET_ID I386_ELF_DATA |
252b5132 RH |
6053 | #define ELF_MACHINE_CODE EM_386 |
6054 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
6055 | |
6056 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 6057 | #define elf_backend_can_refcount 1 |
252b5132 RH |
6058 | #define elf_backend_want_got_plt 1 |
6059 | #define elf_backend_plt_readonly 1 | |
6060 | #define elf_backend_want_plt_sym 0 | |
6061 | #define elf_backend_got_header_size 12 | |
e41b3a13 | 6062 | #define elf_backend_plt_alignment 4 |
f7483970 | 6063 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 6064 | #define elf_backend_caches_rawsize 1 |
252b5132 | 6065 | |
8c29f035 AM |
6066 | /* Support RELA for objdump of prelink objects. */ |
6067 | #define elf_info_to_howto elf_i386_info_to_howto_rel | |
dd5724d5 AM |
6068 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel |
6069 | ||
13ae64f3 | 6070 | #define bfd_elf32_mkobject elf_i386_mkobject |
13ae64f3 | 6071 | |
dd5724d5 AM |
6072 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
6073 | #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create | |
6074 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup | |
13285a1b | 6075 | #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup |
3972882e | 6076 | #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab |
dd5724d5 AM |
6077 | |
6078 | #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol | |
13285a1b | 6079 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
dd5724d5 | 6080 | #define elf_backend_check_relocs elf_i386_check_relocs |
0ac8d2ca | 6081 | #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol |
6725bdbf | 6082 | #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections |
0ac8d2ca | 6083 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
6084 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
6085 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
233cc9c1 | 6086 | #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms |
dd5724d5 | 6087 | #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook |
c5fccbec DJ |
6088 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
6089 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 6090 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca AM |
6091 | #define elf_backend_relocate_section elf_i386_relocate_section |
6092 | #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections | |
67a4f2b7 | 6093 | #define elf_backend_always_size_sections elf_i386_always_size_sections |
74541ad4 AM |
6094 | #define elf_backend_omit_section_dynsym \ |
6095 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
fdc90cb4 | 6096 | #define elf_backend_hash_symbol elf_i386_hash_symbol |
aec6b87e | 6097 | #define elf_backend_fixup_symbol elf_i386_fixup_symbol |
dd5724d5 | 6098 | |
252b5132 | 6099 | #include "elf32-target.h" |
2bc3c89a AM |
6100 | |
6101 | /* FreeBSD support. */ | |
6102 | ||
6103 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6104 | #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec |
2bc3c89a AM |
6105 | #undef TARGET_LITTLE_NAME |
6106 | #define TARGET_LITTLE_NAME "elf32-i386-freebsd" | |
d1036acb L |
6107 | #undef ELF_OSABI |
6108 | #define ELF_OSABI ELFOSABI_FREEBSD | |
2bc3c89a AM |
6109 | |
6110 | /* The kernel recognizes executables as valid only if they carry a | |
6111 | "FreeBSD" label in the ELF header. So we put this label on all | |
6112 | executables and (for simplicity) also all other object files. */ | |
6113 | ||
2bc3c89a | 6114 | static void |
d8045f23 | 6115 | elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info) |
2bc3c89a | 6116 | { |
78245035 | 6117 | _bfd_elf_post_process_headers (abfd, info); |
2bc3c89a | 6118 | |
2bc3c89a | 6119 | #ifdef OLD_FREEBSD_ABI_LABEL |
cf7363b4 L |
6120 | { |
6121 | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ | |
6122 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
6123 | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); | |
6124 | } | |
caf47ea6 | 6125 | #endif |
2bc3c89a AM |
6126 | } |
6127 | ||
6128 | #undef elf_backend_post_process_headers | |
d8045f23 | 6129 | #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers |
571fe01f NC |
6130 | #undef elf32_bed |
6131 | #define elf32_bed elf32_i386_fbsd_bed | |
2bc3c89a | 6132 | |
d8045f23 NC |
6133 | #undef elf_backend_add_symbol_hook |
6134 | ||
2bc3c89a | 6135 | #include "elf32-target.h" |
eac338cf | 6136 | |
a6cc6b3b RO |
6137 | /* Solaris 2. */ |
6138 | ||
6139 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6140 | #define TARGET_LITTLE_SYM i386_elf32_sol2_vec |
a6cc6b3b RO |
6141 | #undef TARGET_LITTLE_NAME |
6142 | #define TARGET_LITTLE_NAME "elf32-i386-sol2" | |
6143 | ||
914082d1 L |
6144 | #undef elf_backend_post_process_headers |
6145 | ||
a6cc6b3b RO |
6146 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE |
6147 | objects won't be recognized. */ | |
6148 | #undef ELF_OSABI | |
6149 | ||
6150 | #undef elf32_bed | |
6151 | #define elf32_bed elf32_i386_sol2_bed | |
6152 | ||
7dc98aea RO |
6153 | /* The 32-bit static TLS arena size is rounded to the nearest 8-byte |
6154 | boundary. */ | |
84865015 | 6155 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
6156 | #define elf_backend_static_tls_alignment 8 |
6157 | ||
a6cc6b3b RO |
6158 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
6159 | ||
6160 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
6161 | File, p.63. */ | |
84865015 | 6162 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
6163 | #define elf_backend_want_plt_sym 1 |
6164 | ||
84865015 NC |
6165 | #undef elf_backend_strtab_flags |
6166 | #define elf_backend_strtab_flags SHF_STRINGS | |
6167 | ||
5522f910 NC |
6168 | /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which |
6169 | has a type >= SHT_LOOS. Returns TRUE if these fields were initialised | |
6170 | FALSE otherwise. ISECTION is the best guess matching section from the | |
6171 | input bfd IBFD, but it might be NULL. */ | |
6172 | ||
84865015 | 6173 | static bfd_boolean |
5522f910 NC |
6174 | elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
6175 | bfd *obfd ATTRIBUTE_UNUSED, | |
6176 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
6177 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
6178 | { |
6179 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
5522f910 NC |
6180 | and sh_link fields of Solaris specific section types. */ |
6181 | return FALSE; | |
84865015 | 6182 | |
5522f910 | 6183 | /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13, |
84865015 NC |
6184 | Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation: |
6185 | ||
6186 | http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc | |
6187 | ||
6188 | The following values should be set: | |
6189 | ||
6190 | Type Link Info | |
6191 | ----------------------------------------------------------------------------- | |
6192 | SHT_SUNW_ancillary The section header index of 0 | |
6193 | [0x6fffffee] the associated string table. | |
6194 | ||
6195 | SHT_SUNW_capinfo The section header index of For a dynamic object, the | |
6196 | [0x6ffffff0] the associated symbol table. section header index of | |
6197 | the associated | |
6198 | SHT_SUNW_capchain table, | |
6199 | otherwise 0. | |
6200 | ||
6201 | SHT_SUNW_symsort The section header index of 0 | |
6202 | [0x6ffffff1] the associated symbol table. | |
6203 | ||
6204 | SHT_SUNW_tlssort The section header index of 0 | |
6205 | [0x6ffffff2] the associated symbol table. | |
6206 | ||
6207 | SHT_SUNW_LDYNSYM The section header index of One greater than the | |
6208 | [0x6ffffff3] the associated string table. symbol table index of the | |
6209 | This index is the same string last local symbol, | |
6210 | table used by the SHT_DYNSYM STB_LOCAL. Since | |
6211 | section. SHT_SUNW_LDYNSYM only | |
6212 | contains local symbols, | |
6213 | sh_info is equivalent to | |
6214 | the number of symbols in | |
6215 | the table. | |
6216 | ||
6217 | SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer | |
6218 | [0x6ffffff5] the section header index of to named strings, the | |
6219 | the associated section header index of | |
6220 | SHT_SUNW_capinfo table, the associated string | |
6221 | otherwise 0. table, otherwise 0. | |
6222 | ||
6223 | SHT_SUNW_move The section header index of 0 | |
6224 | [0x6ffffffa] the associated symbol table. | |
6225 | ||
6226 | SHT_SUNW_COMDAT 0 0 | |
6227 | [0x6ffffffb] | |
6228 | ||
6229 | SHT_SUNW_syminfo The section header index of The section header index | |
6230 | [0x6ffffffc] the associated symbol table. of the associated | |
6231 | .dynamic section. | |
6232 | ||
6233 | SHT_SUNW_verdef The section header index of The number of version | |
6234 | [0x6ffffffd] the associated string table. definitions within the | |
6235 | section. | |
6236 | ||
6237 | SHT_SUNW_verneed The section header index of The number of version | |
6238 | [0x6ffffffe] the associated string table. dependencies within the | |
6239 | section. | |
6240 | ||
6241 | SHT_SUNW_versym The section header index of 0 | |
6242 | [0x6fffffff] the associated symbol table. */ | |
84865015 NC |
6243 | } |
6244 | ||
5522f910 NC |
6245 | #undef elf_backend_copy_special_section_fields |
6246 | #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields | |
84865015 | 6247 | |
a6cc6b3b RO |
6248 | #include "elf32-target.h" |
6249 | ||
bf64a951 L |
6250 | /* Intel MCU support. */ |
6251 | ||
6252 | static bfd_boolean | |
6253 | elf32_iamcu_elf_object_p (bfd *abfd) | |
6254 | { | |
6255 | /* Set the right machine number for an IAMCU elf32 file. */ | |
6256 | bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu); | |
6257 | return TRUE; | |
6258 | } | |
6259 | ||
6260 | #undef TARGET_LITTLE_SYM | |
6261 | #define TARGET_LITTLE_SYM iamcu_elf32_vec | |
6262 | #undef TARGET_LITTLE_NAME | |
6263 | #define TARGET_LITTLE_NAME "elf32-iamcu" | |
84865015 | 6264 | #undef ELF_ARCH |
bf64a951 L |
6265 | #define ELF_ARCH bfd_arch_iamcu |
6266 | ||
6267 | #undef ELF_MACHINE_CODE | |
6268 | #define ELF_MACHINE_CODE EM_IAMCU | |
6269 | ||
6270 | #undef ELF_OSABI | |
6271 | ||
6272 | #undef elf32_bed | |
6273 | #define elf32_bed elf32_iamcu_bed | |
6274 | ||
6275 | #undef elf_backend_object_p | |
6276 | #define elf_backend_object_p elf32_iamcu_elf_object_p | |
6277 | ||
6278 | #undef elf_backend_static_tls_alignment | |
6279 | ||
6280 | #undef elf_backend_want_plt_sym | |
6281 | #define elf_backend_want_plt_sym 0 | |
6282 | ||
84865015 | 6283 | #undef elf_backend_strtab_flags |
5522f910 | 6284 | #undef elf_backend_copy_special_section_fields |
84865015 | 6285 | |
bf64a951 L |
6286 | #include "elf32-target.h" |
6287 | ||
6288 | /* Restore defaults. */ | |
6289 | #undef ELF_ARCH | |
6290 | #define ELF_ARCH bfd_arch_i386 | |
6291 | #undef ELF_MACHINE_CODE | |
6292 | #define ELF_MACHINE_CODE EM_386 | |
6293 | ||
a27e4371 RM |
6294 | /* Native Client support. */ |
6295 | ||
6296 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6297 | #define TARGET_LITTLE_SYM i386_elf32_nacl_vec |
a27e4371 RM |
6298 | #undef TARGET_LITTLE_NAME |
6299 | #define TARGET_LITTLE_NAME "elf32-i386-nacl" | |
6300 | #undef elf32_bed | |
6301 | #define elf32_bed elf32_i386_nacl_bed | |
6302 | ||
6303 | #undef ELF_MAXPAGESIZE | |
6304 | #define ELF_MAXPAGESIZE 0x10000 | |
6305 | ||
6306 | /* Restore defaults. */ | |
6307 | #undef ELF_OSABI | |
6308 | #undef elf_backend_want_plt_sym | |
6309 | #define elf_backend_want_plt_sym 0 | |
6310 | #undef elf_backend_post_process_headers | |
a27e4371 RM |
6311 | #undef elf_backend_static_tls_alignment |
6312 | ||
6313 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
6314 | ||
6315 | #undef elf_backend_plt_alignment | |
6316 | #define elf_backend_plt_alignment 5 | |
6317 | #define NACL_PLT_ENTRY_SIZE 64 | |
6318 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
6319 | ||
6320 | static const bfd_byte elf_i386_nacl_plt0_entry[] = | |
6321 | { | |
6322 | 0xff, 0x35, /* pushl contents of address */ | |
6323 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
6324 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
6325 | 0, 0, 0, 0, /* replaced with address of .got + 8. */ | |
6326 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
6327 | 0xff, 0xe1 /* jmp *%ecx */ | |
6328 | }; | |
6329 | ||
6330 | static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6331 | { | |
6332 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
6333 | 0, 0, 0, 0, /* replaced with GOT slot address. */ | |
6334 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
6335 | 0xff, 0xe1, /* jmp *%ecx */ | |
6336 | ||
6337 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6338 | 0x90, | |
6339 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6340 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6341 | ||
6342 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6343 | 0x68, /* pushl immediate */ | |
6344 | 0, 0, 0, 0, /* replaced with reloc offset. */ | |
6345 | 0xe9, /* jmp relative */ | |
6346 | 0, 0, 0, 0, /* replaced with offset to .plt. */ | |
6347 | ||
6348 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6349 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6350 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6351 | 0x90, 0x90 | |
6352 | }; | |
6353 | ||
6354 | static const bfd_byte | |
6355 | elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] = | |
6356 | { | |
6357 | 0xff, 0x73, 0x04, /* pushl 4(%ebx) */ | |
6358 | 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */ | |
6359 | 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */ | |
6360 | 0xff, 0xe1, /* jmp *%ecx */ | |
caa0075c RM |
6361 | |
6362 | /* This is expected to be the same size as elf_i386_nacl_plt0_entry, | |
6363 | so pad to that size with nop instructions. */ | |
6364 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 | |
a27e4371 RM |
6365 | }; |
6366 | ||
6367 | static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6368 | { | |
6369 | 0x8b, 0x8b, /* movl offset(%ebx), %ecx */ | |
6370 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
6371 | 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */ | |
6372 | 0xff, 0xe1, /* jmp *%ecx */ | |
6373 | ||
6374 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6375 | 0x90, | |
6376 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6377 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6378 | ||
6379 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6380 | 0x68, /* pushl immediate */ | |
6381 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
6382 | 0xe9, /* jmp relative */ | |
6383 | 0, 0, 0, 0, /* replaced with offset to start of .plt. */ | |
6384 | ||
6385 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6386 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6387 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6388 | 0x90, 0x90 | |
6389 | }; | |
6390 | ||
6391 | static const bfd_byte elf_i386_nacl_eh_frame_plt[] = | |
6392 | { | |
6393 | #if (PLT_CIE_LENGTH != 20 \ | |
6394 | || PLT_FDE_LENGTH != 36 \ | |
6395 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
6396 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
6397 | # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!" | |
6398 | #endif | |
6399 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
6400 | 0, 0, 0, 0, /* CIE ID */ | |
6401 | 1, /* CIE version */ | |
6402 | 'z', 'R', 0, /* Augmentation string */ | |
6403 | 1, /* Code alignment factor */ | |
6404 | 0x7c, /* Data alignment factor: -4 */ | |
6405 | 8, /* Return address column */ | |
6406 | 1, /* Augmentation size */ | |
6407 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
6408 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
6409 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
6410 | DW_CFA_nop, DW_CFA_nop, | |
6411 | ||
6412 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
6413 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
6414 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
6415 | 0, 0, 0, 0, /* .plt size goes here */ | |
6416 | 0, /* Augmentation size */ | |
6417 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
6418 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
6419 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
6420 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
6421 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
6422 | 13, /* Block length */ | |
6423 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
6424 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
6425 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
6426 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, | |
6427 | DW_CFA_nop, DW_CFA_nop | |
6428 | }; | |
6429 | ||
6430 | static const struct elf_i386_plt_layout elf_i386_nacl_plt = | |
6431 | { | |
6432 | elf_i386_nacl_plt0_entry, /* plt0_entry */ | |
6433 | sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */ | |
6434 | 2, /* plt0_got1_offset */ | |
6435 | 8, /* plt0_got2_offset */ | |
6436 | elf_i386_nacl_plt_entry, /* plt_entry */ | |
6437 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
6438 | 2, /* plt_got_offset */ | |
6439 | 33, /* plt_reloc_offset */ | |
6440 | 38, /* plt_plt_offset */ | |
6441 | 32, /* plt_lazy_offset */ | |
6442 | elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */ | |
6443 | elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */ | |
6444 | elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */ | |
6445 | sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */ | |
6446 | }; | |
6447 | ||
6448 | static const struct elf_i386_backend_data elf_i386_nacl_arch_bed = | |
6449 | { | |
6450 | &elf_i386_nacl_plt, /* plt */ | |
6451 | 0x90, /* plt0_pad_byte: nop insn */ | |
6452 | 0, /* is_vxworks */ | |
6453 | }; | |
6454 | ||
64b384e1 RM |
6455 | static bfd_boolean |
6456 | elf32_i386_nacl_elf_object_p (bfd *abfd) | |
6457 | { | |
6458 | /* Set the right machine number for a NaCl i386 ELF32 file. */ | |
6459 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl); | |
6460 | return TRUE; | |
6461 | } | |
6462 | ||
a27e4371 RM |
6463 | #undef elf_backend_arch_data |
6464 | #define elf_backend_arch_data &elf_i386_nacl_arch_bed | |
6465 | ||
64b384e1 RM |
6466 | #undef elf_backend_object_p |
6467 | #define elf_backend_object_p elf32_i386_nacl_elf_object_p | |
5a68afcf RM |
6468 | #undef elf_backend_modify_segment_map |
6469 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
6470 | #undef elf_backend_modify_program_headers | |
6471 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
6472 | #undef elf_backend_final_write_processing |
6473 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 6474 | |
a27e4371 RM |
6475 | #include "elf32-target.h" |
6476 | ||
5a68afcf | 6477 | /* Restore defaults. */ |
64b384e1 | 6478 | #undef elf_backend_object_p |
5a68afcf RM |
6479 | #undef elf_backend_modify_segment_map |
6480 | #undef elf_backend_modify_program_headers | |
887badb3 | 6481 | #undef elf_backend_final_write_processing |
5a68afcf | 6482 | |
eac338cf PB |
6483 | /* VxWorks support. */ |
6484 | ||
6485 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6486 | #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec |
eac338cf PB |
6487 | #undef TARGET_LITTLE_NAME |
6488 | #define TARGET_LITTLE_NAME "elf32-i386-vxworks" | |
d1036acb | 6489 | #undef ELF_OSABI |
a27e4371 RM |
6490 | #undef elf_backend_plt_alignment |
6491 | #define elf_backend_plt_alignment 4 | |
eac338cf | 6492 | |
23209a78 RM |
6493 | static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed = |
6494 | { | |
25e762b9 | 6495 | &elf_i386_plt, /* plt */ |
23209a78 RM |
6496 | 0x90, /* plt0_pad_byte */ |
6497 | 1, /* is_vxworks */ | |
6498 | }; | |
eac338cf | 6499 | |
23209a78 RM |
6500 | #undef elf_backend_arch_data |
6501 | #define elf_backend_arch_data &elf_i386_vxworks_arch_bed | |
eac338cf | 6502 | |
13285a1b | 6503 | #undef elf_backend_relocs_compatible |
eac338cf PB |
6504 | #undef elf_backend_add_symbol_hook |
6505 | #define elf_backend_add_symbol_hook \ | |
6506 | elf_vxworks_add_symbol_hook | |
6507 | #undef elf_backend_link_output_symbol_hook | |
6508 | #define elf_backend_link_output_symbol_hook \ | |
9c72ff84 | 6509 | elf_vxworks_link_output_symbol_hook |
eac338cf PB |
6510 | #undef elf_backend_emit_relocs |
6511 | #define elf_backend_emit_relocs elf_vxworks_emit_relocs | |
6512 | #undef elf_backend_final_write_processing | |
6513 | #define elf_backend_final_write_processing \ | |
6514 | elf_vxworks_final_write_processing | |
7dc98aea | 6515 | #undef elf_backend_static_tls_alignment |
eac338cf PB |
6516 | |
6517 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so | |
6518 | define it. */ | |
6519 | #undef elf_backend_want_plt_sym | |
6520 | #define elf_backend_want_plt_sym 1 | |
6521 | ||
6522 | #undef elf32_bed | |
6523 | #define elf32_bed elf32_i386_vxworks_bed | |
6524 | ||
6525 | #include "elf32-target.h" |