Commit | Line | Data |
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351f65ca | 1 | /* X86-64 specific support for ELF |
250d07de | 2 | Copyright (C) 2000-2021 Free Software Foundation, Inc. |
8d88c4ca NC |
3 | Contributed by Jan Hubicka <jh@suse.cz>. |
4 | ||
ae9a127f | 5 | This file is part of BFD, the Binary File Descriptor library. |
8d88c4ca | 6 | |
ae9a127f NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
ae9a127f | 10 | (at your option) any later version. |
8d88c4ca | 11 | |
ae9a127f NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
8d88c4ca | 16 | |
ae9a127f NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
8d88c4ca | 21 | |
0afcef53 | 22 | #include "elfxx-x86.h" |
e41b3a13 | 23 | #include "dwarf2.h" |
d7921315 | 24 | #include "libiberty.h" |
8d88c4ca | 25 | |
56ceb5b5 | 26 | #include "opcode/i386.h" |
8d88c4ca NC |
27 | #include "elf/x86-64.h" |
28 | ||
8fd79e71 L |
29 | #ifdef CORE_HEADER |
30 | #include <stdarg.h> | |
31 | #include CORE_HEADER | |
32 | #endif | |
33 | ||
8d88c4ca NC |
34 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
35 | #define MINUS_ONE (~ (bfd_vma) 0) | |
36 | ||
351f65ca L |
37 | /* Since both 32-bit and 64-bit x86-64 encode relocation type in the |
38 | identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get | |
39 | relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE | |
40 | since they are the same. */ | |
41 | ||
8d88c4ca | 42 | /* The relocation "howto" table. Order of fields: |
7b81dfbb AJ |
43 | type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow, |
44 | special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */ | |
70256ad8 AJ |
45 | static reloc_howto_type x86_64_elf_howto_table[] = |
46 | { | |
0a1b45a2 | 47 | HOWTO(R_X86_64_NONE, 0, 3, 0, false, 0, complain_overflow_dont, |
17c6c3b9 | 48 | bfd_elf_generic_reloc, "R_X86_64_NONE", false, 0, 0x00000000, |
0a1b45a2 | 49 | false), |
4c398cc0 | 50 | HOWTO(R_X86_64_64, 0, 4, 64, false, 0, complain_overflow_dont, |
17c6c3b9 | 51 | bfd_elf_generic_reloc, "R_X86_64_64", false, 0, MINUS_ONE, |
0a1b45a2 AM |
52 | false), |
53 | HOWTO(R_X86_64_PC32, 0, 2, 32, true, 0, complain_overflow_signed, | |
17c6c3b9 | 54 | bfd_elf_generic_reloc, "R_X86_64_PC32", false, 0, 0xffffffff, |
0a1b45a2 AM |
55 | true), |
56 | HOWTO(R_X86_64_GOT32, 0, 2, 32, false, 0, complain_overflow_signed, | |
17c6c3b9 | 57 | bfd_elf_generic_reloc, "R_X86_64_GOT32", false, 0, 0xffffffff, |
0a1b45a2 AM |
58 | false), |
59 | HOWTO(R_X86_64_PLT32, 0, 2, 32, true, 0, complain_overflow_signed, | |
17c6c3b9 | 60 | bfd_elf_generic_reloc, "R_X86_64_PLT32", false, 0, 0xffffffff, |
0a1b45a2 AM |
61 | true), |
62 | HOWTO(R_X86_64_COPY, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
17c6c3b9 | 63 | bfd_elf_generic_reloc, "R_X86_64_COPY", false, 0, 0xffffffff, |
0a1b45a2 | 64 | false), |
4c398cc0 | 65 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, false, 0, complain_overflow_dont, |
17c6c3b9 JB |
66 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", false, 0, MINUS_ONE, |
67 | false), | |
4c398cc0 | 68 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, false, 0, complain_overflow_dont, |
17c6c3b9 JB |
69 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", false, 0, MINUS_ONE, |
70 | false), | |
4c398cc0 | 71 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, false, 0, complain_overflow_dont, |
17c6c3b9 JB |
72 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", false, 0, MINUS_ONE, |
73 | false), | |
0a1b45a2 | 74 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, true, 0, complain_overflow_signed, |
17c6c3b9 JB |
75 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", false, 0, 0xffffffff, |
76 | true), | |
0a1b45a2 | 77 | HOWTO(R_X86_64_32, 0, 2, 32, false, 0, complain_overflow_unsigned, |
17c6c3b9 | 78 | bfd_elf_generic_reloc, "R_X86_64_32", false, 0, 0xffffffff, |
0a1b45a2 AM |
79 | false), |
80 | HOWTO(R_X86_64_32S, 0, 2, 32, false, 0, complain_overflow_signed, | |
17c6c3b9 | 81 | bfd_elf_generic_reloc, "R_X86_64_32S", false, 0, 0xffffffff, |
0a1b45a2 AM |
82 | false), |
83 | HOWTO(R_X86_64_16, 0, 1, 16, false, 0, complain_overflow_bitfield, | |
17c6c3b9 | 84 | bfd_elf_generic_reloc, "R_X86_64_16", false, 0, 0xffff, false), |
1273b2f8 | 85 | HOWTO(R_X86_64_PC16, 0, 1, 16, true, 0, complain_overflow_bitfield, |
17c6c3b9 | 86 | bfd_elf_generic_reloc, "R_X86_64_PC16", false, 0, 0xffff, true), |
0a1b45a2 | 87 | HOWTO(R_X86_64_8, 0, 0, 8, false, 0, complain_overflow_bitfield, |
17c6c3b9 | 88 | bfd_elf_generic_reloc, "R_X86_64_8", false, 0, 0xff, false), |
0a1b45a2 | 89 | HOWTO(R_X86_64_PC8, 0, 0, 8, true, 0, complain_overflow_signed, |
17c6c3b9 | 90 | bfd_elf_generic_reloc, "R_X86_64_PC8", false, 0, 0xff, true), |
4c398cc0 | 91 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, false, 0, complain_overflow_dont, |
17c6c3b9 JB |
92 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", false, 0, MINUS_ONE, |
93 | false), | |
4c398cc0 | 94 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, false, 0, complain_overflow_dont, |
17c6c3b9 JB |
95 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", false, 0, MINUS_ONE, |
96 | false), | |
4c398cc0 | 97 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, false, 0, complain_overflow_dont, |
17c6c3b9 JB |
98 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", false, 0, MINUS_ONE, |
99 | false), | |
0a1b45a2 | 100 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, true, 0, complain_overflow_signed, |
17c6c3b9 JB |
101 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", false, 0, 0xffffffff, |
102 | true), | |
0a1b45a2 | 103 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, true, 0, complain_overflow_signed, |
17c6c3b9 JB |
104 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", false, 0, 0xffffffff, |
105 | true), | |
0a1b45a2 | 106 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, false, 0, complain_overflow_signed, |
17c6c3b9 JB |
107 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", false, 0, 0xffffffff, |
108 | false), | |
0a1b45a2 | 109 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, true, 0, complain_overflow_signed, |
17c6c3b9 JB |
110 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", false, 0, 0xffffffff, |
111 | true), | |
0a1b45a2 | 112 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, false, 0, complain_overflow_signed, |
17c6c3b9 JB |
113 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", false, 0, 0xffffffff, |
114 | false), | |
4c398cc0 | 115 | HOWTO(R_X86_64_PC64, 0, 4, 64, true, 0, complain_overflow_dont, |
17c6c3b9 | 116 | bfd_elf_generic_reloc, "R_X86_64_PC64", false, 0, MINUS_ONE, |
0a1b45a2 | 117 | true), |
4c398cc0 | 118 | HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, false, 0, complain_overflow_dont, |
17c6c3b9 JB |
119 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", false, 0, MINUS_ONE, |
120 | false), | |
0a1b45a2 | 121 | HOWTO(R_X86_64_GOTPC32, 0, 2, 32, true, 0, complain_overflow_signed, |
17c6c3b9 JB |
122 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", false, 0, 0xffffffff, |
123 | true), | |
0a1b45a2 | 124 | HOWTO(R_X86_64_GOT64, 0, 4, 64, false, 0, complain_overflow_signed, |
17c6c3b9 | 125 | bfd_elf_generic_reloc, "R_X86_64_GOT64", false, 0, MINUS_ONE, |
0a1b45a2 AM |
126 | false), |
127 | HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, true, 0, complain_overflow_signed, | |
17c6c3b9 JB |
128 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", false, 0, MINUS_ONE, |
129 | true), | |
0a1b45a2 | 130 | HOWTO(R_X86_64_GOTPC64, 0, 4, 64, true, 0, complain_overflow_signed, |
17c6c3b9 JB |
131 | bfd_elf_generic_reloc, "R_X86_64_GOTPC64", false, 0, MINUS_ONE, |
132 | true), | |
0a1b45a2 | 133 | HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, false, 0, complain_overflow_signed, |
17c6c3b9 JB |
134 | bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", false, 0, MINUS_ONE, |
135 | false), | |
0a1b45a2 | 136 | HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, false, 0, complain_overflow_signed, |
17c6c3b9 JB |
137 | bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", false, 0, MINUS_ONE, |
138 | false), | |
0a1b45a2 | 139 | HOWTO(R_X86_64_SIZE32, 0, 2, 32, false, 0, complain_overflow_unsigned, |
17c6c3b9 | 140 | bfd_elf_generic_reloc, "R_X86_64_SIZE32", false, 0, 0xffffffff, |
0a1b45a2 | 141 | false), |
4c398cc0 | 142 | HOWTO(R_X86_64_SIZE64, 0, 4, 64, false, 0, complain_overflow_dont, |
17c6c3b9 | 143 | bfd_elf_generic_reloc, "R_X86_64_SIZE64", false, 0, MINUS_ONE, |
0a1b45a2 AM |
144 | false), |
145 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, true, 0, | |
67a4f2b7 | 146 | complain_overflow_bitfield, bfd_elf_generic_reloc, |
17c6c3b9 | 147 | "R_X86_64_GOTPC32_TLSDESC", false, 0, 0xffffffff, true), |
c21346c5 | 148 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 3, 0, false, 0, |
67a4f2b7 AO |
149 | complain_overflow_dont, bfd_elf_generic_reloc, |
150 | "R_X86_64_TLSDESC_CALL", | |
0a1b45a2 AM |
151 | false, 0, 0, false), |
152 | HOWTO(R_X86_64_TLSDESC, 0, 4, 64, false, 0, | |
4c398cc0 | 153 | complain_overflow_dont, bfd_elf_generic_reloc, |
17c6c3b9 | 154 | "R_X86_64_TLSDESC", false, 0, MINUS_ONE, false), |
4c398cc0 | 155 | HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, false, 0, complain_overflow_dont, |
17c6c3b9 JB |
156 | bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", false, 0, MINUS_ONE, |
157 | false), | |
4c398cc0 | 158 | HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, false, 0, complain_overflow_dont, |
17c6c3b9 JB |
159 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", false, 0, MINUS_ONE, |
160 | false), | |
0a1b45a2 | 161 | HOWTO(R_X86_64_PC32_BND, 0, 2, 32, true, 0, complain_overflow_signed, |
17c6c3b9 | 162 | bfd_elf_generic_reloc, "R_X86_64_PC32_BND", false, 0, 0xffffffff, |
0a1b45a2 AM |
163 | true), |
164 | HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, true, 0, complain_overflow_signed, | |
17c6c3b9 | 165 | bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", false, 0, 0xffffffff, |
0a1b45a2 AM |
166 | true), |
167 | HOWTO(R_X86_64_GOTPCRELX, 0, 2, 32, true, 0, complain_overflow_signed, | |
17c6c3b9 JB |
168 | bfd_elf_generic_reloc, "R_X86_64_GOTPCRELX", false, 0, 0xffffffff, |
169 | true), | |
0a1b45a2 | 170 | HOWTO(R_X86_64_REX_GOTPCRELX, 0, 2, 32, true, 0, complain_overflow_signed, |
17c6c3b9 JB |
171 | bfd_elf_generic_reloc, "R_X86_64_REX_GOTPCRELX", false, 0, 0xffffffff, |
172 | true), | |
fe4770f4 | 173 | |
a33d77bc JB |
174 | /* We have a gap in the reloc numbers here. |
175 | R_X86_64_standard counts the number up to this point, and | |
176 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
177 | R_X86_64_GNU_VT* to form an index into this table. */ | |
56ceb5b5 | 178 | #define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1) |
a33d77bc JB |
179 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
180 | ||
fe4770f4 | 181 | /* GNU extension to record C++ vtable hierarchy. */ |
0a1b45a2 AM |
182 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, false, 0, complain_overflow_dont, |
183 | NULL, "R_X86_64_GNU_VTINHERIT", false, 0, 0, false), | |
fe4770f4 AJ |
184 | |
185 | /* GNU extension to record C++ vtable member usage. */ | |
0a1b45a2 AM |
186 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, false, 0, complain_overflow_dont, |
187 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", false, 0, 0, | |
188 | false), | |
d7921315 L |
189 | |
190 | /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */ | |
0a1b45a2 | 191 | HOWTO(R_X86_64_32, 0, 2, 32, false, 0, complain_overflow_bitfield, |
17c6c3b9 | 192 | bfd_elf_generic_reloc, "R_X86_64_32", false, 0, 0xffffffff, |
0a1b45a2 | 193 | false) |
8d88c4ca NC |
194 | }; |
195 | ||
daf1c414 | 196 | #define X86_PCREL_TYPE_P(TYPE) \ |
d8045f23 NC |
197 | ( ((TYPE) == R_X86_64_PC8) \ |
198 | || ((TYPE) == R_X86_64_PC16) \ | |
199 | || ((TYPE) == R_X86_64_PC32) \ | |
c3320543 | 200 | || ((TYPE) == R_X86_64_PC32_BND) \ |
d8045f23 NC |
201 | || ((TYPE) == R_X86_64_PC64)) |
202 | ||
aebcc8ff L |
203 | #define X86_SIZE_TYPE_P(TYPE) \ |
204 | ((TYPE) == R_X86_64_SIZE32 || (TYPE) == R_X86_64_SIZE64) | |
205 | ||
8d88c4ca | 206 | /* Map BFD relocs to the x86_64 elf relocs. */ |
70256ad8 AJ |
207 | struct elf_reloc_map |
208 | { | |
8d88c4ca NC |
209 | bfd_reloc_code_real_type bfd_reloc_val; |
210 | unsigned char elf_reloc_val; | |
211 | }; | |
212 | ||
dc810e39 | 213 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 214 | { |
70256ad8 AJ |
215 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
216 | { BFD_RELOC_64, R_X86_64_64, }, | |
217 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
218 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
219 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
220 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
221 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
222 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
223 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
224 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
225 | { BFD_RELOC_32, R_X86_64_32, }, | |
226 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
227 | { BFD_RELOC_16, R_X86_64_16, }, | |
228 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
229 | { BFD_RELOC_8, R_X86_64_8, }, | |
230 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
231 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
232 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
233 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
234 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
235 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
236 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
237 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
238 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
239 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
240 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
241 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
242 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
243 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
244 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
245 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
246 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
1788fc08 L |
247 | { BFD_RELOC_SIZE32, R_X86_64_SIZE32, }, |
248 | { BFD_RELOC_SIZE64, R_X86_64_SIZE64, }, | |
67a4f2b7 AO |
249 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
250 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
251 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
cbe950e9 | 252 | { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, }, |
56ceb5b5 L |
253 | { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND, }, |
254 | { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND, }, | |
255 | { BFD_RELOC_X86_64_GOTPCRELX, R_X86_64_GOTPCRELX, }, | |
256 | { BFD_RELOC_X86_64_REX_GOTPCRELX, R_X86_64_REX_GOTPCRELX, }, | |
fe4770f4 AJ |
257 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
258 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
259 | }; |
260 | ||
67a4f2b7 | 261 | static reloc_howto_type * |
351f65ca | 262 | elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) |
67a4f2b7 AO |
263 | { |
264 | unsigned i; | |
265 | ||
d7921315 L |
266 | if (r_type == (unsigned int) R_X86_64_32) |
267 | { | |
268 | if (ABI_64_P (abfd)) | |
269 | i = r_type; | |
270 | else | |
271 | i = ARRAY_SIZE (x86_64_elf_howto_table) - 1; | |
272 | } | |
273 | else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
274 | || r_type >= (unsigned int) R_X86_64_max) | |
67a4f2b7 AO |
275 | { |
276 | if (r_type >= (unsigned int) R_X86_64_standard) | |
277 | { | |
695344c0 | 278 | /* xgettext:c-format */ |
0aa13fee AM |
279 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
280 | abfd, r_type); | |
f3185997 NC |
281 | bfd_set_error (bfd_error_bad_value); |
282 | return NULL; | |
67a4f2b7 AO |
283 | } |
284 | i = r_type; | |
285 | } | |
286 | else | |
287 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
288 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
289 | return &x86_64_elf_howto_table[i]; | |
290 | } | |
8d88c4ca NC |
291 | |
292 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
293 | static reloc_howto_type * | |
351f65ca L |
294 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
295 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
296 | { |
297 | unsigned int i; | |
27482721 | 298 | |
8d88c4ca NC |
299 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
300 | i++) | |
301 | { | |
302 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
303 | return elf_x86_64_rtype_to_howto (abfd, |
304 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca | 305 | } |
5860e3f8 | 306 | return NULL; |
8d88c4ca NC |
307 | } |
308 | ||
157090f7 | 309 | static reloc_howto_type * |
d7921315 | 310 | elf_x86_64_reloc_name_lookup (bfd *abfd, |
351f65ca | 311 | const char *r_name) |
157090f7 AM |
312 | { |
313 | unsigned int i; | |
314 | ||
d7921315 L |
315 | if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0) |
316 | { | |
317 | /* Get x32 R_X86_64_32. */ | |
318 | reloc_howto_type *reloc | |
319 | = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1]; | |
320 | BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32); | |
321 | return reloc; | |
322 | } | |
323 | ||
324 | for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++) | |
157090f7 AM |
325 | if (x86_64_elf_howto_table[i].name != NULL |
326 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
327 | return &x86_64_elf_howto_table[i]; | |
328 | ||
329 | return NULL; | |
330 | } | |
331 | ||
8d88c4ca | 332 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 333 | |
0a1b45a2 | 334 | static bool |
f3185997 | 335 | elf_x86_64_info_to_howto (bfd *abfd, arelent *cache_ptr, |
351f65ca | 336 | Elf_Internal_Rela *dst) |
8d88c4ca | 337 | { |
67a4f2b7 | 338 | unsigned r_type; |
8d88c4ca | 339 | |
351f65ca L |
340 | r_type = ELF32_R_TYPE (dst->r_info); |
341 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); | |
f3185997 | 342 | if (cache_ptr->howto == NULL) |
0a1b45a2 | 343 | return false; |
262c0a87 | 344 | BFD_ASSERT (r_type == cache_ptr->howto->type || cache_ptr->howto->type == R_X86_64_NONE); |
0a1b45a2 | 345 | return true; |
8d88c4ca | 346 | } |
70256ad8 | 347 | \f |
3bab7989 | 348 | /* Support for core dump NOTE sections. */ |
0a1b45a2 | 349 | static bool |
351f65ca | 350 | elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
351 | { |
352 | int offset; | |
eea6121a | 353 | size_t size; |
3bab7989 ML |
354 | |
355 | switch (note->descsz) | |
356 | { | |
357 | default: | |
0a1b45a2 | 358 | return false; |
3bab7989 | 359 | |
bcd823f1 L |
360 | case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */ |
361 | /* pr_cursig */ | |
228e534f | 362 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
bcd823f1 L |
363 | |
364 | /* pr_pid */ | |
228e534f | 365 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
bcd823f1 L |
366 | |
367 | /* pr_reg */ | |
368 | offset = 72; | |
369 | size = 216; | |
370 | ||
371 | break; | |
372 | ||
3bab7989 ML |
373 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ |
374 | /* pr_cursig */ | |
228e534f | 375 | elf_tdata (abfd)->core->signal |
3bab7989 ML |
376 | = bfd_get_16 (abfd, note->descdata + 12); |
377 | ||
378 | /* pr_pid */ | |
228e534f | 379 | elf_tdata (abfd)->core->lwpid |
3bab7989 ML |
380 | = bfd_get_32 (abfd, note->descdata + 32); |
381 | ||
382 | /* pr_reg */ | |
383 | offset = 112; | |
eea6121a | 384 | size = 216; |
3bab7989 ML |
385 | |
386 | break; | |
387 | } | |
388 | ||
389 | /* Make a ".reg/999" section. */ | |
390 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 391 | size, note->descpos + offset); |
3bab7989 ML |
392 | } |
393 | ||
0a1b45a2 | 394 | static bool |
351f65ca | 395 | elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
396 | { |
397 | switch (note->descsz) | |
398 | { | |
399 | default: | |
0a1b45a2 | 400 | return false; |
3bab7989 | 401 | |
bcd823f1 | 402 | case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */ |
228e534f | 403 | elf_tdata (abfd)->core->pid |
bcd823f1 | 404 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 405 | elf_tdata (abfd)->core->program |
bcd823f1 | 406 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 407 | elf_tdata (abfd)->core->command |
bcd823f1 L |
408 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
409 | break; | |
410 | ||
3bab7989 | 411 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ |
228e534f | 412 | elf_tdata (abfd)->core->pid |
261b8d08 | 413 | = bfd_get_32 (abfd, note->descdata + 24); |
228e534f | 414 | elf_tdata (abfd)->core->program |
3bab7989 | 415 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
228e534f | 416 | elf_tdata (abfd)->core->command |
3bab7989 ML |
417 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
418 | } | |
419 | ||
420 | /* Note that for some reason, a spurious space is tacked | |
421 | onto the end of the args in some (at least one anyway) | |
422 | implementations, so strip it off if it exists. */ | |
423 | ||
424 | { | |
228e534f | 425 | char *command = elf_tdata (abfd)->core->command; |
3bab7989 ML |
426 | int n = strlen (command); |
427 | ||
428 | if (0 < n && command[n - 1] == ' ') | |
429 | command[n - 1] = '\0'; | |
430 | } | |
431 | ||
0a1b45a2 | 432 | return true; |
3bab7989 | 433 | } |
8fd79e71 L |
434 | |
435 | #ifdef CORE_HEADER | |
602f1657 AM |
436 | # if GCC_VERSION >= 8000 |
437 | # pragma GCC diagnostic push | |
438 | # pragma GCC diagnostic ignored "-Wstringop-truncation" | |
439 | # endif | |
8fd79e71 L |
440 | static char * |
441 | elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz, | |
442 | int note_type, ...) | |
443 | { | |
444 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8fd79e71 L |
445 | va_list ap; |
446 | const char *fname, *psargs; | |
447 | long pid; | |
448 | int cursig; | |
449 | const void *gregs; | |
450 | ||
451 | switch (note_type) | |
452 | { | |
453 | default: | |
454 | return NULL; | |
455 | ||
456 | case NT_PRPSINFO: | |
457 | va_start (ap, note_type); | |
458 | fname = va_arg (ap, const char *); | |
459 | psargs = va_arg (ap, const char *); | |
460 | va_end (ap); | |
461 | ||
462 | if (bed->s->elfclass == ELFCLASS32) | |
463 | { | |
464 | prpsinfo32_t data; | |
465 | memset (&data, 0, sizeof (data)); | |
466 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
467 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
468 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
469 | &data, sizeof (data)); | |
8fd79e71 L |
470 | } |
471 | else | |
472 | { | |
b1bd052d | 473 | prpsinfo64_t data; |
8fd79e71 L |
474 | memset (&data, 0, sizeof (data)); |
475 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
476 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
477 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
478 | &data, sizeof (data)); | |
8fd79e71 | 479 | } |
e85c6a70 | 480 | /* NOTREACHED */ |
8fd79e71 L |
481 | |
482 | case NT_PRSTATUS: | |
483 | va_start (ap, note_type); | |
484 | pid = va_arg (ap, long); | |
485 | cursig = va_arg (ap, int); | |
486 | gregs = va_arg (ap, const void *); | |
487 | va_end (ap); | |
488 | ||
489 | if (bed->s->elfclass == ELFCLASS32) | |
490 | { | |
491 | if (bed->elf_machine_code == EM_X86_64) | |
492 | { | |
493 | prstatusx32_t prstat; | |
494 | memset (&prstat, 0, sizeof (prstat)); | |
495 | prstat.pr_pid = pid; | |
496 | prstat.pr_cursig = cursig; | |
497 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
498 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
499 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
500 | } |
501 | else | |
502 | { | |
503 | prstatus32_t prstat; | |
504 | memset (&prstat, 0, sizeof (prstat)); | |
505 | prstat.pr_pid = pid; | |
506 | prstat.pr_cursig = cursig; | |
507 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
508 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
509 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
510 | } |
511 | } | |
512 | else | |
513 | { | |
b1bd052d | 514 | prstatus64_t prstat; |
8fd79e71 L |
515 | memset (&prstat, 0, sizeof (prstat)); |
516 | prstat.pr_pid = pid; | |
517 | prstat.pr_cursig = cursig; | |
518 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
519 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
520 | &prstat, sizeof (prstat)); | |
8fd79e71 | 521 | } |
8fd79e71 | 522 | } |
e85c6a70 | 523 | /* NOTREACHED */ |
8fd79e71 | 524 | } |
602f1657 AM |
525 | # if GCC_VERSION >= 8000 |
526 | # pragma GCC diagnostic pop | |
527 | # endif | |
8fd79e71 | 528 | #endif |
3bab7989 | 529 | \f |
407443a3 | 530 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 531 | |
70256ad8 AJ |
532 | /* The size in bytes of an entry in the global offset table. */ |
533 | ||
534 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 535 | |
38b12349 | 536 | /* The size in bytes of an entry in the lazy procedure linkage table. */ |
8d88c4ca | 537 | |
38b12349 | 538 | #define LAZY_PLT_ENTRY_SIZE 16 |
70256ad8 | 539 | |
38b12349 L |
540 | /* The size in bytes of an entry in the non-lazy procedure linkage |
541 | table. */ | |
70256ad8 | 542 | |
38b12349 L |
543 | #define NON_LAZY_PLT_ENTRY_SIZE 8 |
544 | ||
545 | /* The first entry in a lazy procedure linkage table looks like this. | |
546 | See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this | |
547 | works. */ | |
548 | ||
549 | static const bfd_byte elf_x86_64_lazy_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
70256ad8 | 550 | { |
653165cc AJ |
551 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
552 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 553 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
554 | }; |
555 | ||
38b12349 | 556 | /* Subsequent entries in a lazy procedure linkage table look like this. */ |
70256ad8 | 557 | |
38b12349 | 558 | static const bfd_byte elf_x86_64_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
70256ad8 | 559 | { |
653165cc | 560 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 561 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 562 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
563 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
564 | 0xe9, /* jmp relative */ | |
565 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
566 | }; | |
567 | ||
38b12349 | 568 | /* The first entry in a lazy procedure linkage table with BND prefix |
0ff2b86e L |
569 | like this. */ |
570 | ||
38b12349 | 571 | static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 572 | { |
07d6d2b8 | 573 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
0ff2b86e | 574 | 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */ |
07d6d2b8 | 575 | 0x0f, 0x1f, 0 /* nopl (%rax) */ |
0ff2b86e L |
576 | }; |
577 | ||
38b12349 L |
578 | /* Subsequent entries for branches with BND prefx in a lazy procedure |
579 | linkage table look like this. */ | |
0ff2b86e | 580 | |
38b12349 | 581 | static const bfd_byte elf_x86_64_lazy_bnd_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 582 | { |
07d6d2b8 AM |
583 | 0x68, 0, 0, 0, 0, /* pushq immediate */ |
584 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
585 | 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */ | |
0ff2b86e L |
586 | }; |
587 | ||
ee2fdd6f L |
588 | /* The first entry in the IBT-enabled lazy procedure linkage table is the |
589 | the same as the lazy PLT with BND prefix so that bound registers are | |
590 | preserved when control is passed to dynamic linker. Subsequent | |
591 | entries for a IBT-enabled lazy procedure linkage table look like | |
592 | this. */ | |
593 | ||
594 | static const bfd_byte elf_x86_64_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
595 | { | |
07d6d2b8 AM |
596 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
597 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
598 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
599 | 0x90 /* nop */ | |
ee2fdd6f L |
600 | }; |
601 | ||
602 | /* The first entry in the x32 IBT-enabled lazy procedure linkage table | |
de194d85 | 603 | is the same as the normal lazy PLT. Subsequent entries for an |
ee2fdd6f L |
604 | x32 IBT-enabled lazy procedure linkage table look like this. */ |
605 | ||
606 | static const bfd_byte elf_x32_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
607 | { | |
07d6d2b8 AM |
608 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
609 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
610 | 0xe9, 0, 0, 0, 0, /* jmpq relative */ | |
611 | 0x66, 0x90 /* xchg %ax,%ax */ | |
ee2fdd6f L |
612 | }; |
613 | ||
38b12349 | 614 | /* Entries in the non-lazey procedure linkage table look like this. */ |
0ff2b86e | 615 | |
38b12349 | 616 | static const bfd_byte elf_x86_64_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 617 | { |
07d6d2b8 AM |
618 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
619 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
620 | 0x66, 0x90 /* xchg %ax,%ax */ | |
0ff2b86e L |
621 | }; |
622 | ||
38b12349 L |
623 | /* Entries for branches with BND prefix in the non-lazey procedure |
624 | linkage table look like this. */ | |
0ff2b86e | 625 | |
38b12349 | 626 | static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 627 | { |
07d6d2b8 AM |
628 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ |
629 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
630 | 0x90 /* nop */ | |
0ff2b86e L |
631 | }; |
632 | ||
ee2fdd6f L |
633 | /* Entries for branches with IBT-enabled in the non-lazey procedure |
634 | linkage table look like this. They have the same size as the lazy | |
635 | PLT entry. */ | |
636 | ||
637 | static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
638 | { | |
07d6d2b8 AM |
639 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
640 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ | |
ee2fdd6f | 641 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
07d6d2b8 | 642 | 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */ |
ee2fdd6f L |
643 | }; |
644 | ||
645 | /* Entries for branches with IBT-enabled in the x32 non-lazey procedure | |
646 | linkage table look like this. They have the same size as the lazy | |
647 | PLT entry. */ | |
648 | ||
649 | static const bfd_byte elf_x32_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
650 | { | |
07d6d2b8 AM |
651 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
652 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ | |
ee2fdd6f L |
653 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
654 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
655 | }; | |
656 | ||
92e68c1d L |
657 | /* The TLSDESC entry in a lazy procedure linkage table. */ |
658 | static const bfd_byte elf_x86_64_tlsdesc_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
659 | { | |
660 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
661 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
662 | 0xff, 0x25, 16, 0, 0, 0 /* jmpq *GOT+TDG(%rip) */ | |
663 | }; | |
664 | ||
38b12349 | 665 | /* .eh_frame covering the lazy .plt section. */ |
e41b3a13 | 666 | |
38b12349 | 667 | static const bfd_byte elf_x86_64_eh_frame_lazy_plt[] = |
e41b3a13 | 668 | { |
e41b3a13 JJ |
669 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ |
670 | 0, 0, 0, 0, /* CIE ID */ | |
671 | 1, /* CIE version */ | |
672 | 'z', 'R', 0, /* Augmentation string */ | |
673 | 1, /* Code alignment factor */ | |
674 | 0x78, /* Data alignment factor */ | |
675 | 16, /* Return address column */ | |
676 | 1, /* Augmentation size */ | |
677 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
678 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
679 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
680 | DW_CFA_nop, DW_CFA_nop, | |
681 | ||
682 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
683 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
684 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
685 | 0, 0, 0, 0, /* .plt size goes here */ | |
686 | 0, /* Augmentation size */ | |
687 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
688 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
689 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
690 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
691 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
692 | 11, /* Block length */ | |
693 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
694 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
695 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
696 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
697 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
698 | }; | |
699 | ||
38b12349 | 700 | /* .eh_frame covering the lazy BND .plt section. */ |
9e659176 | 701 | |
38b12349 | 702 | static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt[] = |
9e659176 L |
703 | { |
704 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
705 | 0, 0, 0, 0, /* CIE ID */ | |
706 | 1, /* CIE version */ | |
707 | 'z', 'R', 0, /* Augmentation string */ | |
708 | 1, /* Code alignment factor */ | |
709 | 0x78, /* Data alignment factor */ | |
710 | 16, /* Return address column */ | |
711 | 1, /* Augmentation size */ | |
712 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
713 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
714 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
715 | DW_CFA_nop, DW_CFA_nop, | |
716 | ||
717 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
718 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
719 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
720 | 0, 0, 0, 0, /* .plt size goes here */ | |
721 | 0, /* Augmentation size */ | |
722 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
723 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
724 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
725 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
726 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
727 | 11, /* Block length */ | |
728 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
729 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
730 | DW_OP_lit15, DW_OP_and, DW_OP_lit5, DW_OP_ge, | |
731 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
732 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
733 | }; | |
734 | ||
ee2fdd6f L |
735 | /* .eh_frame covering the lazy .plt section with IBT-enabled. */ |
736 | ||
737 | static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt[] = | |
738 | { | |
739 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
740 | 0, 0, 0, 0, /* CIE ID */ | |
741 | 1, /* CIE version */ | |
742 | 'z', 'R', 0, /* Augmentation string */ | |
743 | 1, /* Code alignment factor */ | |
744 | 0x78, /* Data alignment factor */ | |
745 | 16, /* Return address column */ | |
746 | 1, /* Augmentation size */ | |
747 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
748 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
749 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
750 | DW_CFA_nop, DW_CFA_nop, | |
751 | ||
752 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
753 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
754 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
755 | 0, 0, 0, 0, /* .plt size goes here */ | |
756 | 0, /* Augmentation size */ | |
757 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
758 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
759 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
760 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
761 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
762 | 11, /* Block length */ | |
763 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
764 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
765 | DW_OP_lit15, DW_OP_and, DW_OP_lit10, DW_OP_ge, | |
766 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
767 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
768 | }; | |
769 | ||
770 | /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */ | |
771 | ||
772 | static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt[] = | |
773 | { | |
774 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
775 | 0, 0, 0, 0, /* CIE ID */ | |
776 | 1, /* CIE version */ | |
777 | 'z', 'R', 0, /* Augmentation string */ | |
778 | 1, /* Code alignment factor */ | |
779 | 0x78, /* Data alignment factor */ | |
780 | 16, /* Return address column */ | |
781 | 1, /* Augmentation size */ | |
782 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
783 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
784 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
785 | DW_CFA_nop, DW_CFA_nop, | |
786 | ||
787 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
788 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
789 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
790 | 0, 0, 0, 0, /* .plt size goes here */ | |
791 | 0, /* Augmentation size */ | |
792 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
793 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
794 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
795 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
796 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
797 | 11, /* Block length */ | |
798 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
799 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
800 | DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge, | |
801 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
802 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
803 | }; | |
804 | ||
38b12349 | 805 | /* .eh_frame covering the non-lazy .plt section. */ |
fff53dae | 806 | |
38b12349 | 807 | static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt[] = |
fff53dae L |
808 | { |
809 | #define PLT_GOT_FDE_LENGTH 20 | |
810 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
811 | 0, 0, 0, 0, /* CIE ID */ | |
812 | 1, /* CIE version */ | |
813 | 'z', 'R', 0, /* Augmentation string */ | |
814 | 1, /* Code alignment factor */ | |
815 | 0x78, /* Data alignment factor */ | |
816 | 16, /* Return address column */ | |
817 | 1, /* Augmentation size */ | |
818 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
819 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
820 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
821 | DW_CFA_nop, DW_CFA_nop, | |
822 | ||
823 | PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
824 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
38b12349 L |
825 | 0, 0, 0, 0, /* the start of non-lazy .plt goes here */ |
826 | 0, 0, 0, 0, /* non-lazy .plt size goes here */ | |
fff53dae L |
827 | 0, /* Augmentation size */ |
828 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, | |
829 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
830 | }; | |
831 | ||
eed180f8 | 832 | /* These are the standard parameters. */ |
765e526c | 833 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt = |
eed180f8 | 834 | { |
07d6d2b8 AM |
835 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ |
836 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
837 | elf_x86_64_lazy_plt_entry, /* plt_entry */ | |
838 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
839 | elf_x86_64_tlsdesc_plt_entry, /* plt_tlsdesc_entry */ |
840 | LAZY_PLT_ENTRY_SIZE, /* plt_tlsdesc_entry_size */ | |
841 | 6, /* plt_tlsdesc_got1_offset */ | |
842 | 12, /* plt_tlsdesc_got2_offset */ | |
843 | 10, /* plt_tlsdesc_got1_insn_end */ | |
844 | 16, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
845 | 2, /* plt0_got1_offset */ |
846 | 8, /* plt0_got2_offset */ | |
847 | 12, /* plt0_got2_insn_end */ | |
848 | 2, /* plt_got_offset */ | |
849 | 7, /* plt_reloc_offset */ | |
850 | 12, /* plt_plt_offset */ | |
851 | 6, /* plt_got_insn_size */ | |
852 | LAZY_PLT_ENTRY_SIZE, /* plt_plt_insn_end */ | |
853 | 6, /* plt_lazy_offset */ | |
854 | elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */ | |
855 | elf_x86_64_lazy_plt_entry, /* pic_plt_entry */ | |
856 | elf_x86_64_eh_frame_lazy_plt, /* eh_frame_plt */ | |
38b12349 L |
857 | sizeof (elf_x86_64_eh_frame_lazy_plt) /* eh_frame_plt_size */ |
858 | }; | |
859 | ||
765e526c | 860 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_plt = |
38b12349 | 861 | { |
07d6d2b8 AM |
862 | elf_x86_64_non_lazy_plt_entry, /* plt_entry */ |
863 | elf_x86_64_non_lazy_plt_entry, /* pic_plt_entry */ | |
864 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
865 | 2, /* plt_got_offset */ | |
866 | 6, /* plt_got_insn_size */ | |
867 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
38b12349 | 868 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
eed180f8 RM |
869 | }; |
870 | ||
765e526c | 871 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_bnd_plt = |
0ff2b86e | 872 | { |
07d6d2b8 AM |
873 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ |
874 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
875 | elf_x86_64_lazy_bnd_plt_entry, /* plt_entry */ | |
876 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
877 | elf_x86_64_tlsdesc_plt_entry, /* plt_tlsdesc_entry */ |
878 | LAZY_PLT_ENTRY_SIZE, /* plt_tlsdesc_entry_size */ | |
879 | 6, /* plt_tlsdesc_got1_offset */ | |
880 | 12, /* plt_tlsdesc_got2_offset */ | |
881 | 10, /* plt_tlsdesc_got1_insn_end */ | |
882 | 16, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
883 | 2, /* plt0_got1_offset */ |
884 | 1+8, /* plt0_got2_offset */ | |
885 | 1+12, /* plt0_got2_insn_end */ | |
886 | 1+2, /* plt_got_offset */ | |
887 | 1, /* plt_reloc_offset */ | |
888 | 7, /* plt_plt_offset */ | |
889 | 1+6, /* plt_got_insn_size */ | |
890 | 11, /* plt_plt_insn_end */ | |
891 | 0, /* plt_lazy_offset */ | |
892 | elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */ | |
893 | elf_x86_64_lazy_bnd_plt_entry, /* pic_plt_entry */ | |
894 | elf_x86_64_eh_frame_lazy_bnd_plt, /* eh_frame_plt */ | |
38b12349 L |
895 | sizeof (elf_x86_64_eh_frame_lazy_bnd_plt) /* eh_frame_plt_size */ |
896 | }; | |
897 | ||
765e526c | 898 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt = |
38b12349 | 899 | { |
07d6d2b8 AM |
900 | elf_x86_64_non_lazy_bnd_plt_entry, /* plt_entry */ |
901 | elf_x86_64_non_lazy_bnd_plt_entry, /* pic_plt_entry */ | |
902 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
903 | 1+2, /* plt_got_offset */ | |
904 | 1+6, /* plt_got_insn_size */ | |
905 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
38b12349 L |
906 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
907 | }; | |
908 | ||
765e526c | 909 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt = |
ee2fdd6f | 910 | { |
07d6d2b8 AM |
911 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ |
912 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
913 | elf_x86_64_lazy_ibt_plt_entry, /* plt_entry */ | |
914 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
915 | elf_x86_64_tlsdesc_plt_entry, /* plt_tlsdesc_entry */ |
916 | LAZY_PLT_ENTRY_SIZE, /* plt_tlsdesc_entry_size */ | |
917 | 6, /* plt_tlsdesc_got1_offset */ | |
918 | 12, /* plt_tlsdesc_got2_offset */ | |
919 | 10, /* plt_tlsdesc_got1_insn_end */ | |
920 | 16, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
921 | 2, /* plt0_got1_offset */ |
922 | 1+8, /* plt0_got2_offset */ | |
923 | 1+12, /* plt0_got2_insn_end */ | |
924 | 4+1+2, /* plt_got_offset */ | |
925 | 4+1, /* plt_reloc_offset */ | |
926 | 4+1+6, /* plt_plt_offset */ | |
927 | 4+1+6, /* plt_got_insn_size */ | |
928 | 4+1+5+5, /* plt_plt_insn_end */ | |
929 | 0, /* plt_lazy_offset */ | |
930 | elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */ | |
931 | elf_x86_64_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
932 | elf_x86_64_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
933 | sizeof (elf_x86_64_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ |
934 | }; | |
935 | ||
765e526c | 936 | static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt = |
ee2fdd6f | 937 | { |
07d6d2b8 AM |
938 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ |
939 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
940 | elf_x32_lazy_ibt_plt_entry, /* plt_entry */ | |
941 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
942 | elf_x86_64_tlsdesc_plt_entry, /* plt_tlsdesc_entry */ |
943 | LAZY_PLT_ENTRY_SIZE, /* plt_tlsdesc_entry_size */ | |
944 | 6, /* plt_tlsdesc_got1_offset */ | |
945 | 12, /* plt_tlsdesc_got2_offset */ | |
946 | 10, /* plt_tlsdesc_got1_insn_end */ | |
947 | 16, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
948 | 2, /* plt0_got1_offset */ |
949 | 8, /* plt0_got2_offset */ | |
950 | 12, /* plt0_got2_insn_end */ | |
951 | 4+2, /* plt_got_offset */ | |
952 | 4+1, /* plt_reloc_offset */ | |
953 | 4+6, /* plt_plt_offset */ | |
954 | 4+6, /* plt_got_insn_size */ | |
955 | 4+5+5, /* plt_plt_insn_end */ | |
956 | 0, /* plt_lazy_offset */ | |
957 | elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */ | |
958 | elf_x32_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
959 | elf_x32_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
960 | sizeof (elf_x32_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ |
961 | }; | |
962 | ||
765e526c | 963 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt = |
ee2fdd6f | 964 | { |
07d6d2b8 AM |
965 | elf_x86_64_non_lazy_ibt_plt_entry, /* plt_entry */ |
966 | elf_x86_64_non_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
967 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
968 | 4+1+2, /* plt_got_offset */ | |
969 | 4+1+6, /* plt_got_insn_size */ | |
970 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
971 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
972 | }; | |
973 | ||
765e526c | 974 | static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt = |
ee2fdd6f | 975 | { |
07d6d2b8 AM |
976 | elf_x32_non_lazy_ibt_plt_entry, /* plt_entry */ |
977 | elf_x32_non_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
978 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
979 | 4+2, /* plt_got_offset */ | |
980 | 4+6, /* plt_got_insn_size */ | |
981 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
982 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
983 | }; | |
984 | ||
eed180f8 | 985 | |
0a1b45a2 | 986 | static bool |
27482721 | 987 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 988 | { |
8d88c4ca NC |
989 | /* Set the right machine number for an x86-64 elf64 file. */ |
990 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
0a1b45a2 | 991 | return true; |
8d88c4ca NC |
992 | } |
993 | ||
0a1b45a2 | 994 | static bool |
8059fb19 RM |
995 | elf32_x86_64_elf_object_p (bfd *abfd) |
996 | { | |
997 | /* Set the right machine number for an x86-64 elf32 file. */ | |
998 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
0a1b45a2 | 999 | return true; |
8059fb19 RM |
1000 | } |
1001 | ||
142411ca L |
1002 | /* Return TRUE if the TLS access code sequence support transition |
1003 | from R_TYPE. */ | |
1004 | ||
0a1b45a2 | 1005 | static bool |
351f65ca L |
1006 | elf_x86_64_check_tls_transition (bfd *abfd, |
1007 | struct bfd_link_info *info, | |
1008 | asection *sec, | |
1009 | bfd_byte *contents, | |
1010 | Elf_Internal_Shdr *symtab_hdr, | |
1011 | struct elf_link_hash_entry **sym_hashes, | |
1012 | unsigned int r_type, | |
1013 | const Elf_Internal_Rela *rel, | |
1014 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1015 | { |
142411ca L |
1016 | unsigned int val; |
1017 | unsigned long r_symndx; | |
0a1b45a2 | 1018 | bool largepic = false; |
142411ca L |
1019 | struct elf_link_hash_entry *h; |
1020 | bfd_vma offset; | |
0afcef53 | 1021 | struct elf_x86_link_hash_table *htab; |
e2cbcd91 | 1022 | bfd_byte *call; |
0a1b45a2 | 1023 | bool indirect_call; |
142411ca | 1024 | |
0afcef53 | 1025 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
142411ca | 1026 | offset = rel->r_offset; |
bffbf940 | 1027 | switch (r_type) |
142411ca L |
1028 | { |
1029 | case R_X86_64_TLSGD: | |
1030 | case R_X86_64_TLSLD: | |
1031 | if ((rel + 1) >= relend) | |
0a1b45a2 | 1032 | return false; |
142411ca L |
1033 | |
1034 | if (r_type == R_X86_64_TLSGD) | |
1035 | { | |
52bc799a | 1036 | /* Check transition from GD access model. For 64bit, only |
142411ca | 1037 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
e2cbcd91 L |
1038 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1039 | or | |
1040 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
1041 | .byte 0x66; rex64 | |
1042 | call *__tls_get_addr@GOTPCREL(%rip) | |
1043 | which may be converted to | |
1044 | addr32 call __tls_get_addr | |
52bc799a L |
1045 | can transit to different access model. For 32bit, only |
1046 | leaq foo@tlsgd(%rip), %rdi | |
e2cbcd91 L |
1047 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1048 | or | |
1049 | leaq foo@tlsgd(%rip), %rdi | |
1050 | .byte 0x66; rex64 | |
1051 | call *__tls_get_addr@GOTPCREL(%rip) | |
1052 | which may be converted to | |
1053 | addr32 call __tls_get_addr | |
1054 | can transit to different access model. For largepic, | |
5c98a14e | 1055 | we also support: |
07d6d2b8 AM |
1056 | leaq foo@tlsgd(%rip), %rdi |
1057 | movabsq $__tls_get_addr@pltoff, %rax | |
1058 | addq $r15, %rax | |
1059 | call *%rax | |
e2cbcd91 | 1060 | or |
07d6d2b8 AM |
1061 | leaq foo@tlsgd(%rip), %rdi |
1062 | movabsq $__tls_get_addr@pltoff, %rax | |
1063 | addq $rbx, %rax | |
1064 | call *%rax */ | |
142411ca | 1065 | |
fa289a5f AM |
1066 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; |
1067 | ||
5c98a14e | 1068 | if ((offset + 12) > sec->size) |
0a1b45a2 | 1069 | return false; |
52bc799a | 1070 | |
e2cbcd91 L |
1071 | call = contents + offset + 4; |
1072 | if (call[0] != 0x66 | |
1073 | || !((call[1] == 0x48 | |
1074 | && call[2] == 0xff | |
1075 | && call[3] == 0x15) | |
1076 | || (call[1] == 0x48 | |
1077 | && call[2] == 0x67 | |
1078 | && call[3] == 0xe8) | |
1079 | || (call[1] == 0x66 | |
1080 | && call[2] == 0x48 | |
1081 | && call[3] == 0xe8))) | |
5c98a14e JJ |
1082 | { |
1083 | if (!ABI_64_P (abfd) | |
1084 | || (offset + 19) > sec->size | |
1085 | || offset < 3 | |
e2cbcd91 L |
1086 | || memcmp (call - 7, leaq + 1, 3) != 0 |
1087 | || memcmp (call, "\x48\xb8", 2) != 0 | |
1088 | || call[11] != 0x01 | |
1089 | || call[13] != 0xff | |
1090 | || call[14] != 0xd0 | |
1091 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1092 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
0a1b45a2 AM |
1093 | return false; |
1094 | largepic = true; | |
5c98a14e JJ |
1095 | } |
1096 | else if (ABI_64_P (abfd)) | |
52bc799a | 1097 | { |
52bc799a | 1098 | if (offset < 4 |
fa289a5f | 1099 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
0a1b45a2 | 1100 | return false; |
52bc799a L |
1101 | } |
1102 | else | |
1103 | { | |
52bc799a | 1104 | if (offset < 3 |
fa289a5f | 1105 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
0a1b45a2 | 1106 | return false; |
52bc799a | 1107 | } |
e2cbcd91 | 1108 | indirect_call = call[2] == 0xff; |
142411ca L |
1109 | } |
1110 | else | |
1111 | { | |
1112 | /* Check transition from LD access model. Only | |
1113 | leaq foo@tlsld(%rip), %rdi; | |
e2cbcd91 | 1114 | call __tls_get_addr@PLT |
07d6d2b8 | 1115 | or |
e2cbcd91 L |
1116 | leaq foo@tlsld(%rip), %rdi; |
1117 | call *__tls_get_addr@GOTPCREL(%rip) | |
1118 | which may be converted to | |
1119 | addr32 call __tls_get_addr | |
5c98a14e JJ |
1120 | can transit to different access model. For largepic |
1121 | we also support: | |
07d6d2b8 AM |
1122 | leaq foo@tlsld(%rip), %rdi |
1123 | movabsq $__tls_get_addr@pltoff, %rax | |
1124 | addq $r15, %rax | |
1125 | call *%rax | |
e2cbcd91 | 1126 | or |
07d6d2b8 AM |
1127 | leaq foo@tlsld(%rip), %rdi |
1128 | movabsq $__tls_get_addr@pltoff, %rax | |
1129 | addq $rbx, %rax | |
1130 | call *%rax */ | |
142411ca | 1131 | |
fa289a5f | 1132 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1133 | |
1134 | if (offset < 3 || (offset + 9) > sec->size) | |
0a1b45a2 | 1135 | return false; |
142411ca | 1136 | |
5c98a14e | 1137 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
0a1b45a2 | 1138 | return false; |
5c98a14e | 1139 | |
e2cbcd91 L |
1140 | call = contents + offset + 4; |
1141 | if (!(call[0] == 0xe8 | |
1142 | || (call[0] == 0xff && call[1] == 0x15) | |
1143 | || (call[0] == 0x67 && call[1] == 0xe8))) | |
5c98a14e JJ |
1144 | { |
1145 | if (!ABI_64_P (abfd) | |
1146 | || (offset + 19) > sec->size | |
e2cbcd91 L |
1147 | || memcmp (call, "\x48\xb8", 2) != 0 |
1148 | || call[11] != 0x01 | |
1149 | || call[13] != 0xff | |
1150 | || call[14] != 0xd0 | |
1151 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1152 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
0a1b45a2 AM |
1153 | return false; |
1154 | largepic = true; | |
5c98a14e | 1155 | } |
e2cbcd91 | 1156 | indirect_call = call[0] == 0xff; |
142411ca L |
1157 | } |
1158 | ||
351f65ca | 1159 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca | 1160 | if (r_symndx < symtab_hdr->sh_info) |
0a1b45a2 | 1161 | return false; |
142411ca L |
1162 | |
1163 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1d4af308 | 1164 | if (h == NULL |
0afcef53 | 1165 | || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr) |
0a1b45a2 | 1166 | return false; |
e2cbcd91 | 1167 | else |
78984959 L |
1168 | { |
1169 | r_type = (ELF32_R_TYPE (rel[1].r_info) | |
1170 | & ~R_X86_64_converted_reloc_bit); | |
1171 | if (largepic) | |
1172 | return r_type == R_X86_64_PLTOFF64; | |
1173 | else if (indirect_call) | |
1174 | return r_type == R_X86_64_GOTPCRELX; | |
1175 | else | |
1176 | return (r_type == R_X86_64_PC32 || r_type == R_X86_64_PLT32); | |
1177 | } | |
142411ca L |
1178 | |
1179 | case R_X86_64_GOTTPOFF: | |
1180 | /* Check transition from IE access model: | |
4a4c5f25 L |
1181 | mov foo@gottpoff(%rip), %reg |
1182 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1183 | */ |
1184 | ||
4a4c5f25 L |
1185 | /* Check REX prefix first. */ |
1186 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1187 | { | |
1188 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1189 | if (val != 0x48 && val != 0x4c) | |
1190 | { | |
1191 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1192 | if (ABI_64_P (abfd)) | |
0a1b45a2 | 1193 | return false; |
4a4c5f25 L |
1194 | } |
1195 | } | |
1196 | else | |
1197 | { | |
1198 | /* X32 may not have any REX prefix. */ | |
1199 | if (ABI_64_P (abfd)) | |
0a1b45a2 | 1200 | return false; |
4a4c5f25 | 1201 | if (offset < 2 || (offset + 3) > sec->size) |
0a1b45a2 | 1202 | return false; |
4a4c5f25 | 1203 | } |
142411ca L |
1204 | |
1205 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1206 | if (val != 0x8b && val != 0x03) | |
0a1b45a2 | 1207 | return false; |
142411ca L |
1208 | |
1209 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1210 | return (val & 0xc7) == 5; | |
1211 | ||
1212 | case R_X86_64_GOTPC32_TLSDESC: | |
1213 | /* Check transition from GDesc access model: | |
14470f07 L |
1214 | leaq x@tlsdesc(%rip), %rax <--- LP64 mode. |
1215 | rex leal x@tlsdesc(%rip), %eax <--- X32 mode. | |
142411ca L |
1216 | |
1217 | Make sure it's a leaq adding rip to a 32-bit offset | |
1218 | into any register, although it's probably almost always | |
1219 | going to be rax. */ | |
1220 | ||
1221 | if (offset < 3 || (offset + 4) > sec->size) | |
0a1b45a2 | 1222 | return false; |
142411ca L |
1223 | |
1224 | val = bfd_get_8 (abfd, contents + offset - 3); | |
14470f07 L |
1225 | val &= 0xfb; |
1226 | if (val != 0x48 && (ABI_64_P (abfd) || val != 0x40)) | |
0a1b45a2 | 1227 | return false; |
142411ca L |
1228 | |
1229 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
0a1b45a2 | 1230 | return false; |
142411ca L |
1231 | |
1232 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1233 | return (val & 0xc7) == 0x05; | |
1234 | ||
1235 | case R_X86_64_TLSDESC_CALL: | |
1236 | /* Check transition from GDesc access model: | |
14470f07 L |
1237 | call *x@tlsdesc(%rax) <--- LP64 mode. |
1238 | call *x@tlsdesc(%eax) <--- X32 mode. | |
142411ca L |
1239 | */ |
1240 | if (offset + 2 <= sec->size) | |
1241 | { | |
14470f07 | 1242 | unsigned int prefix; |
e2cbcd91 | 1243 | call = contents + offset; |
14470f07 L |
1244 | prefix = 0; |
1245 | if (!ABI_64_P (abfd)) | |
1246 | { | |
1247 | /* Check for call *x@tlsdesc(%eax). */ | |
1248 | if (call[0] == 0x67) | |
1249 | { | |
1250 | prefix = 1; | |
1251 | if (offset + 3 > sec->size) | |
0a1b45a2 | 1252 | return false; |
14470f07 L |
1253 | } |
1254 | } | |
1255 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
1256 | return call[prefix] == 0xff && call[1 + prefix] == 0x10; | |
142411ca L |
1257 | } |
1258 | ||
0a1b45a2 | 1259 | return false; |
142411ca L |
1260 | |
1261 | default: | |
1262 | abort (); | |
1263 | } | |
1264 | } | |
1265 | ||
1266 | /* Return TRUE if the TLS access transition is OK or no transition | |
1267 | will be performed. Update R_TYPE if there is a transition. */ | |
1268 | ||
0a1b45a2 | 1269 | static bool |
351f65ca L |
1270 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1271 | asection *sec, bfd_byte *contents, | |
1272 | Elf_Internal_Shdr *symtab_hdr, | |
1273 | struct elf_link_hash_entry **sym_hashes, | |
1274 | unsigned int *r_type, int tls_type, | |
1275 | const Elf_Internal_Rela *rel, | |
1276 | const Elf_Internal_Rela *relend, | |
1277 | struct elf_link_hash_entry *h, | |
bedfd056 | 1278 | unsigned long r_symndx, |
0a1b45a2 | 1279 | bool from_relocate_section) |
142411ca L |
1280 | { |
1281 | unsigned int from_type = *r_type; | |
1282 | unsigned int to_type = from_type; | |
0a1b45a2 | 1283 | bool check = true; |
142411ca | 1284 | |
bb1cb422 L |
1285 | /* Skip TLS transition for functions. */ |
1286 | if (h != NULL | |
1287 | && (h->type == STT_FUNC | |
1288 | || h->type == STT_GNU_IFUNC)) | |
0a1b45a2 | 1289 | return true; |
bb1cb422 | 1290 | |
142411ca | 1291 | switch (from_type) |
bffbf940 JJ |
1292 | { |
1293 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1294 | case R_X86_64_GOTPC32_TLSDESC: |
1295 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1296 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1297 | if (bfd_link_executable (info)) |
142411ca L |
1298 | { |
1299 | if (h == NULL) | |
1300 | to_type = R_X86_64_TPOFF32; | |
1301 | else | |
1302 | to_type = R_X86_64_GOTTPOFF; | |
1303 | } | |
1304 | ||
bedfd056 L |
1305 | /* When we are called from elf_x86_64_relocate_section, there may |
1306 | be additional transitions based on TLS_TYPE. */ | |
1307 | if (from_relocate_section) | |
142411ca L |
1308 | { |
1309 | unsigned int new_to_type = to_type; | |
1310 | ||
51537393 | 1311 | if (TLS_TRANSITION_IE_TO_LE_P (info, h, tls_type)) |
142411ca L |
1312 | new_to_type = R_X86_64_TPOFF32; |
1313 | ||
1314 | if (to_type == R_X86_64_TLSGD | |
1315 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1316 | || to_type == R_X86_64_TLSDESC_CALL) | |
1317 | { | |
1318 | if (tls_type == GOT_TLS_IE) | |
1319 | new_to_type = R_X86_64_GOTTPOFF; | |
1320 | } | |
1321 | ||
1322 | /* We checked the transition before when we were called from | |
351f65ca | 1323 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1324 | transition which hasn't been checked before. */ |
1325 | check = new_to_type != to_type && from_type == to_type; | |
1326 | to_type = new_to_type; | |
1327 | } | |
1328 | ||
1329 | break; | |
1330 | ||
bffbf940 | 1331 | case R_X86_64_TLSLD: |
0e1862bb | 1332 | if (bfd_link_executable (info)) |
142411ca L |
1333 | to_type = R_X86_64_TPOFF32; |
1334 | break; | |
1335 | ||
1336 | default: | |
0a1b45a2 | 1337 | return true; |
bffbf940 JJ |
1338 | } |
1339 | ||
142411ca L |
1340 | /* Return TRUE if there is no transition. */ |
1341 | if (from_type == to_type) | |
0a1b45a2 | 1342 | return true; |
142411ca L |
1343 | |
1344 | /* Check if the transition can be performed. */ | |
1345 | if (check | |
351f65ca L |
1346 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1347 | symtab_hdr, sym_hashes, | |
1348 | from_type, rel, relend)) | |
142411ca | 1349 | { |
2f629d23 | 1350 | reloc_howto_type *from, *to; |
4c544807 | 1351 | const char *name; |
142411ca | 1352 | |
351f65ca L |
1353 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1354 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1355 | |
f3185997 | 1356 | if (from == NULL || to == NULL) |
0a1b45a2 | 1357 | return false; |
f3185997 | 1358 | |
4c544807 L |
1359 | if (h) |
1360 | name = h->root.root.string; | |
1361 | else | |
1362 | { | |
0afcef53 | 1363 | struct elf_x86_link_hash_table *htab; |
4dfe6ac6 | 1364 | |
0afcef53 | 1365 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
1366 | if (htab == NULL) |
1367 | name = "*unknown*"; | |
1368 | else | |
1369 | { | |
1370 | Elf_Internal_Sym *isym; | |
1371 | ||
f1dfbfdb | 1372 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, |
4dfe6ac6 NC |
1373 | abfd, r_symndx); |
1374 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1375 | } | |
4c544807 L |
1376 | } |
1377 | ||
4eca0228 | 1378 | _bfd_error_handler |
695344c0 | 1379 | /* xgettext:c-format */ |
2dcf00ce AM |
1380 | (_("%pB: TLS transition from %s to %s against `%s' at %#" PRIx64 |
1381 | " in section `%pA' failed"), | |
1382 | abfd, from->name, to->name, name, (uint64_t) rel->r_offset, sec); | |
142411ca | 1383 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 1384 | return false; |
142411ca L |
1385 | } |
1386 | ||
1387 | *r_type = to_type; | |
0a1b45a2 | 1388 | return true; |
bffbf940 JJ |
1389 | } |
1390 | ||
c1d11331 L |
1391 | /* Rename some of the generic section flags to better document how they |
1392 | are used here. */ | |
6999821f | 1393 | #define check_relocs_failed sec_flg0 |
338c190a | 1394 | |
0a1b45a2 | 1395 | static bool |
aab921ad L |
1396 | elf_x86_64_need_pic (struct bfd_link_info *info, |
1397 | bfd *input_bfd, asection *sec, | |
338c190a L |
1398 | struct elf_link_hash_entry *h, |
1399 | Elf_Internal_Shdr *symtab_hdr, | |
1400 | Elf_Internal_Sym *isym, | |
1401 | reloc_howto_type *howto) | |
1402 | { | |
1403 | const char *v = ""; | |
1404 | const char *und = ""; | |
1405 | const char *pic = ""; | |
aab921ad | 1406 | const char *object; |
338c190a L |
1407 | |
1408 | const char *name; | |
1409 | if (h) | |
1410 | { | |
1411 | name = h->root.root.string; | |
1412 | switch (ELF_ST_VISIBILITY (h->other)) | |
1413 | { | |
1414 | case STV_HIDDEN: | |
1415 | v = _("hidden symbol "); | |
1416 | break; | |
1417 | case STV_INTERNAL: | |
1418 | v = _("internal symbol "); | |
1419 | break; | |
1420 | case STV_PROTECTED: | |
1421 | v = _("protected symbol "); | |
1422 | break; | |
1423 | default: | |
0afcef53 | 1424 | if (((struct elf_x86_link_hash_entry *) h)->def_protected) |
a5b4ee94 L |
1425 | v = _("protected symbol "); |
1426 | else | |
1427 | v = _("symbol "); | |
9a7f0679 | 1428 | pic = NULL; |
338c190a L |
1429 | break; |
1430 | } | |
1431 | ||
83924b38 | 1432 | if (!SYMBOL_DEFINED_NON_SHARED_P (h) && !h->def_dynamic) |
338c190a L |
1433 | und = _("undefined "); |
1434 | } | |
1435 | else | |
1436 | { | |
1437 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL); | |
9a7f0679 | 1438 | pic = NULL; |
338c190a L |
1439 | } |
1440 | ||
aab921ad | 1441 | if (bfd_link_dll (info)) |
9a7f0679 L |
1442 | { |
1443 | object = _("a shared object"); | |
1444 | if (!pic) | |
1445 | pic = _("; recompile with -fPIC"); | |
1446 | } | |
aab921ad | 1447 | else |
9a7f0679 L |
1448 | { |
1449 | if (bfd_link_pie (info)) | |
1450 | object = _("a PIE object"); | |
1451 | else | |
1452 | object = _("a PDE object"); | |
1453 | if (!pic) | |
1454 | pic = _("; recompile with -fPIE"); | |
1455 | } | |
aab921ad | 1456 | |
695344c0 | 1457 | /* xgettext:c-format */ |
871b3ab2 | 1458 | _bfd_error_handler (_("%pB: relocation %s against %s%s`%s' can " |
aab921ad L |
1459 | "not be used when making %s%s"), |
1460 | input_bfd, howto->name, und, v, name, | |
1461 | object, pic); | |
338c190a L |
1462 | bfd_set_error (bfd_error_bad_value); |
1463 | sec->check_relocs_failed = 1; | |
0a1b45a2 | 1464 | return false; |
338c190a | 1465 | } |
c1d11331 | 1466 | |
c175a657 L |
1467 | /* With the local symbol, foo, we convert |
1468 | mov foo@GOTPCREL(%rip), %reg | |
1469 | to | |
1470 | lea foo(%rip), %reg | |
1471 | and convert | |
1472 | call/jmp *foo@GOTPCREL(%rip) | |
1473 | to | |
1474 | nop call foo/jmp foo nop | |
1475 | When PIC is false, convert | |
1476 | test %reg, foo@GOTPCREL(%rip) | |
1477 | to | |
1478 | test $foo, %reg | |
1479 | and convert | |
1480 | binop foo@GOTPCREL(%rip), %reg | |
1481 | to | |
1482 | binop $foo, %reg | |
1483 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1484 | instructions. */ | |
1485 | ||
0a1b45a2 | 1486 | static bool |
8b43e456 | 1487 | elf_x86_64_convert_load_reloc (bfd *abfd, |
c175a657 | 1488 | bfd_byte *contents, |
6999821f | 1489 | unsigned int *r_type_p, |
c175a657 L |
1490 | Elf_Internal_Rela *irel, |
1491 | struct elf_link_hash_entry *h, | |
0a1b45a2 | 1492 | bool *converted, |
c175a657 L |
1493 | struct bfd_link_info *link_info) |
1494 | { | |
0afcef53 | 1495 | struct elf_x86_link_hash_table *htab; |
0a1b45a2 AM |
1496 | bool is_pic; |
1497 | bool no_overflow; | |
1498 | bool relocx; | |
1499 | bool to_reloc_pc32; | |
1500 | bool abs_symbol; | |
1501 | bool local_ref; | |
c175a657 | 1502 | asection *tsec; |
c175a657 L |
1503 | bfd_signed_vma raddend; |
1504 | unsigned int opcode; | |
1505 | unsigned int modrm; | |
6999821f | 1506 | unsigned int r_type = *r_type_p; |
c175a657 | 1507 | unsigned int r_symndx; |
c175a657 | 1508 | bfd_vma roff = irel->r_offset; |
382aae06 | 1509 | bfd_vma abs_relocation; |
c175a657 L |
1510 | |
1511 | if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2)) | |
0a1b45a2 | 1512 | return true; |
c175a657 L |
1513 | |
1514 | raddend = irel->r_addend; | |
1515 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
1516 | if (raddend != -4) | |
0a1b45a2 | 1517 | return true; |
c175a657 | 1518 | |
0afcef53 | 1519 | htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA); |
c175a657 L |
1520 | is_pic = bfd_link_pic (link_info); |
1521 | ||
1522 | relocx = (r_type == R_X86_64_GOTPCRELX | |
1523 | || r_type == R_X86_64_REX_GOTPCRELX); | |
1524 | ||
8b43e456 L |
1525 | /* TRUE if --no-relax is used. */ |
1526 | no_overflow = link_info->disable_target_specific_optimizations > 1; | |
c175a657 L |
1527 | |
1528 | r_symndx = htab->r_sym (irel->r_info); | |
1529 | ||
1530 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1531 | ||
1532 | /* Convert mov to lea since it has been done for a while. */ | |
1533 | if (opcode != 0x8b) | |
1534 | { | |
1535 | /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX | |
1536 | for call, jmp or one of adc, add, and, cmp, or, sbb, sub, | |
1537 | test, xor instructions. */ | |
1538 | if (!relocx) | |
0a1b45a2 | 1539 | return true; |
c175a657 L |
1540 | } |
1541 | ||
1542 | /* We convert only to R_X86_64_PC32: | |
1543 | 1. Branch. | |
1544 | 2. R_X86_64_GOTPCREL since we can't modify REX byte. | |
8b43e456 | 1545 | 3. no_overflow is true. |
c175a657 L |
1546 | 4. PIC. |
1547 | */ | |
1548 | to_reloc_pc32 = (opcode == 0xff | |
1549 | || !relocx | |
8b43e456 | 1550 | || no_overflow |
c175a657 L |
1551 | || is_pic); |
1552 | ||
0a1b45a2 | 1553 | abs_symbol = false; |
382aae06 L |
1554 | abs_relocation = 0; |
1555 | ||
c175a657 L |
1556 | /* Get the symbol referred to by the reloc. */ |
1557 | if (h == NULL) | |
1558 | { | |
1559 | Elf_Internal_Sym *isym | |
f1dfbfdb | 1560 | = bfd_sym_from_r_symndx (&htab->elf.sym_cache, abfd, r_symndx); |
c175a657 L |
1561 | |
1562 | /* Skip relocation against undefined symbols. */ | |
1563 | if (isym->st_shndx == SHN_UNDEF) | |
0a1b45a2 | 1564 | return true; |
c175a657 | 1565 | |
0a1b45a2 | 1566 | local_ref = true; |
c175a657 | 1567 | if (isym->st_shndx == SHN_ABS) |
382aae06 L |
1568 | { |
1569 | tsec = bfd_abs_section_ptr; | |
0a1b45a2 | 1570 | abs_symbol = true; |
382aae06 L |
1571 | abs_relocation = isym->st_value; |
1572 | } | |
c175a657 L |
1573 | else if (isym->st_shndx == SHN_COMMON) |
1574 | tsec = bfd_com_section_ptr; | |
1575 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
1576 | tsec = &_bfd_elf_large_com_section; | |
1577 | else | |
1578 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c175a657 L |
1579 | } |
1580 | else | |
1581 | { | |
1582 | /* Undefined weak symbol is only bound locally in executable | |
1583 | and its reference is resolved as 0 without relocation | |
1584 | overflow. We can only perform this optimization for | |
1585 | GOTPCRELX relocations since we need to modify REX byte. | |
1586 | It is OK convert mov with R_X86_64_GOTPCREL to | |
1587 | R_X86_64_PC32. */ | |
0a27fed7 L |
1588 | struct elf_x86_link_hash_entry *eh = elf_x86_hash_entry (h); |
1589 | ||
382aae06 L |
1590 | abs_symbol = ABS_SYMBOL_P (h); |
1591 | abs_relocation = h->root.u.def.value; | |
1592 | ||
0a27fed7 L |
1593 | /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */ |
1594 | local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h); | |
c175a657 | 1595 | if ((relocx || opcode == 0x8b) |
0a27fed7 L |
1596 | && (h->root.type == bfd_link_hash_undefweak |
1597 | && !eh->linker_def | |
1598 | && local_ref)) | |
c175a657 L |
1599 | { |
1600 | if (opcode == 0xff) | |
1601 | { | |
1602 | /* Skip for branch instructions since R_X86_64_PC32 | |
1603 | may overflow. */ | |
8b43e456 | 1604 | if (no_overflow) |
0a1b45a2 | 1605 | return true; |
c175a657 L |
1606 | } |
1607 | else if (relocx) | |
1608 | { | |
1609 | /* For non-branch instructions, we can convert to | |
1610 | R_X86_64_32/R_X86_64_32S since we know if there | |
1611 | is a REX byte. */ | |
0a1b45a2 | 1612 | to_reloc_pc32 = false; |
c175a657 L |
1613 | } |
1614 | ||
1615 | /* Since we don't know the current PC when PIC is true, | |
1616 | we can't convert to R_X86_64_PC32. */ | |
1617 | if (to_reloc_pc32 && is_pic) | |
0a1b45a2 | 1618 | return true; |
c175a657 L |
1619 | |
1620 | goto convert; | |
1621 | } | |
1622 | /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since | |
1623 | ld.so may use its link-time address. */ | |
cbd0eecf | 1624 | else if (h->start_stop |
0a27fed7 | 1625 | || eh->linker_def |
cbd0eecf L |
1626 | || ((h->def_regular |
1627 | || h->root.type == bfd_link_hash_defined | |
1628 | || h->root.type == bfd_link_hash_defweak) | |
1629 | && h != htab->elf.hdynamic | |
0a27fed7 | 1630 | && local_ref)) |
c175a657 L |
1631 | { |
1632 | /* bfd_link_hash_new or bfd_link_hash_undefined is | |
1633 | set by an assignment in a linker script in | |
cbd0eecf L |
1634 | bfd_elf_record_link_assignment. start_stop is set |
1635 | on __start_SECNAME/__stop_SECNAME which mark section | |
1636 | SECNAME. */ | |
1637 | if (h->start_stop | |
0a27fed7 | 1638 | || eh->linker_def |
cbd0eecf L |
1639 | || (h->def_regular |
1640 | && (h->root.type == bfd_link_hash_new | |
1641 | || h->root.type == bfd_link_hash_undefined | |
1642 | || ((h->root.type == bfd_link_hash_defined | |
1643 | || h->root.type == bfd_link_hash_defweak) | |
1644 | && h->root.u.def.section == bfd_und_section_ptr)))) | |
c175a657 L |
1645 | { |
1646 | /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */ | |
8b43e456 | 1647 | if (no_overflow) |
0a1b45a2 | 1648 | return true; |
c175a657 L |
1649 | goto convert; |
1650 | } | |
1651 | tsec = h->root.u.def.section; | |
c175a657 L |
1652 | } |
1653 | else | |
0a1b45a2 | 1654 | return true; |
c175a657 L |
1655 | } |
1656 | ||
2168b268 L |
1657 | /* Don't convert GOTPCREL relocation against large section. */ |
1658 | if (elf_section_data (tsec) != NULL | |
1659 | && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0) | |
0a1b45a2 | 1660 | return true; |
2168b268 | 1661 | |
8b43e456 L |
1662 | /* Skip since R_X86_64_PC32/R_X86_64_32/R_X86_64_32S may overflow. */ |
1663 | if (no_overflow) | |
0a1b45a2 | 1664 | return true; |
c175a657 | 1665 | |
dc1e8a47 | 1666 | convert: |
c175a657 L |
1667 | if (opcode == 0xff) |
1668 | { | |
1669 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
1670 | unsigned int nop; | |
1671 | unsigned int disp; | |
1672 | bfd_vma nop_offset; | |
1673 | ||
1674 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
1675 | R_X86_64_PC32. */ | |
1676 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1677 | if (modrm == 0x25) | |
1678 | { | |
1679 | /* Convert to "jmp foo nop". */ | |
1680 | modrm = 0xe9; | |
1681 | nop = NOP_OPCODE; | |
1682 | nop_offset = irel->r_offset + 3; | |
1683 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1684 | irel->r_offset -= 1; | |
1685 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1686 | } | |
1687 | else | |
1688 | { | |
0afcef53 L |
1689 | struct elf_x86_link_hash_entry *eh |
1690 | = (struct elf_x86_link_hash_entry *) h; | |
e2cbcd91 | 1691 | |
c175a657 L |
1692 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
1693 | is a nop prefix. */ | |
1694 | modrm = 0xe8; | |
e2cbcd91 L |
1695 | /* To support TLS optimization, always use addr32 prefix for |
1696 | "call *__tls_get_addr@GOTPCREL(%rip)". */ | |
1d4af308 | 1697 | if (eh && eh->tls_get_addr) |
c175a657 | 1698 | { |
e2cbcd91 L |
1699 | nop = 0x67; |
1700 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1701 | } |
1702 | else | |
e2cbcd91 | 1703 | { |
5b9c07b2 L |
1704 | nop = htab->params->call_nop_byte; |
1705 | if (htab->params->call_nop_as_suffix) | |
e2cbcd91 L |
1706 | { |
1707 | nop_offset = irel->r_offset + 3; | |
1708 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1709 | irel->r_offset -= 1; | |
1710 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1711 | } | |
1712 | else | |
1713 | nop_offset = irel->r_offset - 2; | |
1714 | } | |
c175a657 L |
1715 | } |
1716 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1717 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1718 | r_type = R_X86_64_PC32; | |
1719 | } | |
1720 | else | |
1721 | { | |
1722 | unsigned int rex; | |
1723 | unsigned int rex_mask = REX_R; | |
1724 | ||
1725 | if (r_type == R_X86_64_REX_GOTPCRELX) | |
1726 | rex = bfd_get_8 (abfd, contents + roff - 3); | |
1727 | else | |
1728 | rex = 0; | |
1729 | ||
1730 | if (opcode == 0x8b) | |
1731 | { | |
7e45e7a9 | 1732 | if (abs_symbol && local_ref && relocx) |
0a1b45a2 | 1733 | to_reloc_pc32 = false; |
382aae06 | 1734 | |
c175a657 L |
1735 | if (to_reloc_pc32) |
1736 | { | |
1737 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1738 | "lea foo(%rip), %reg". */ | |
1739 | opcode = 0x8d; | |
1740 | r_type = R_X86_64_PC32; | |
1741 | } | |
1742 | else | |
1743 | { | |
1744 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1745 | "mov $foo, %reg". */ | |
1746 | opcode = 0xc7; | |
1747 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1748 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1749 | if ((rex & REX_W) != 0 | |
1750 | && ABI_64_P (link_info->output_bfd)) | |
1751 | { | |
1752 | /* Keep the REX_W bit in REX byte for LP64. */ | |
1753 | r_type = R_X86_64_32S; | |
1754 | goto rewrite_modrm_rex; | |
1755 | } | |
1756 | else | |
1757 | { | |
1758 | /* If the REX_W bit in REX byte isn't needed, | |
1759 | use R_X86_64_32 and clear the W bit to avoid | |
1760 | sign-extend imm32 to imm64. */ | |
1761 | r_type = R_X86_64_32; | |
1762 | /* Clear the W bit in REX byte. */ | |
1763 | rex_mask |= REX_W; | |
1764 | goto rewrite_modrm_rex; | |
1765 | } | |
1766 | } | |
1767 | } | |
1768 | else | |
1769 | { | |
1770 | /* R_X86_64_PC32 isn't supported. */ | |
1771 | if (to_reloc_pc32) | |
0a1b45a2 | 1772 | return true; |
c175a657 L |
1773 | |
1774 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1775 | if (opcode == 0x85) | |
1776 | { | |
1777 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
1778 | "test $foo, %reg". */ | |
1779 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1780 | opcode = 0xf7; | |
1781 | } | |
1782 | else | |
1783 | { | |
1784 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
1785 | "binop $foo, %reg". */ | |
1786 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
1787 | opcode = 0x81; | |
1788 | } | |
1789 | ||
1790 | /* Use R_X86_64_32 with 32-bit operand to avoid relocation | |
1791 | overflow when sign-extending imm32 to imm64. */ | |
1792 | r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32; | |
1793 | ||
dc1e8a47 | 1794 | rewrite_modrm_rex: |
382aae06 L |
1795 | if (abs_relocation) |
1796 | { | |
1797 | /* Check if R_X86_64_32S/R_X86_64_32 fits. */ | |
1798 | if (r_type == R_X86_64_32S) | |
1799 | { | |
1800 | if ((abs_relocation + 0x80000000) > 0xffffffff) | |
0a1b45a2 | 1801 | return true; |
382aae06 L |
1802 | } |
1803 | else | |
1804 | { | |
1805 | if (abs_relocation > 0xffffffff) | |
0a1b45a2 | 1806 | return true; |
382aae06 L |
1807 | } |
1808 | } | |
1809 | ||
c175a657 L |
1810 | bfd_put_8 (abfd, modrm, contents + roff - 1); |
1811 | ||
1812 | if (rex) | |
1813 | { | |
1814 | /* Move the R bit to the B bit in REX byte. */ | |
1815 | rex = (rex & ~rex_mask) | (rex & REX_R) >> 2; | |
1816 | bfd_put_8 (abfd, rex, contents + roff - 3); | |
1817 | } | |
1818 | ||
1819 | /* No addend for R_X86_64_32/R_X86_64_32S relocations. */ | |
1820 | irel->r_addend = 0; | |
1821 | } | |
1822 | ||
1823 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1824 | } | |
1825 | ||
6999821f | 1826 | *r_type_p = r_type; |
78984959 L |
1827 | irel->r_info = htab->r_info (r_symndx, |
1828 | r_type | R_X86_64_converted_reloc_bit); | |
c175a657 | 1829 | |
0a1b45a2 | 1830 | *converted = true; |
c175a657 | 1831 | |
0a1b45a2 | 1832 | return true; |
c175a657 L |
1833 | } |
1834 | ||
70256ad8 | 1835 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1836 | calculate needed space in the global offset table, procedure |
1837 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1838 | |
0a1b45a2 | 1839 | static bool |
351f65ca L |
1840 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1841 | asection *sec, | |
1842 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1843 | { |
0afcef53 | 1844 | struct elf_x86_link_hash_table *htab; |
70256ad8 AJ |
1845 | Elf_Internal_Shdr *symtab_hdr; |
1846 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1847 | const Elf_Internal_Rela *rel; |
1848 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 1849 | asection *sreloc; |
bedfd056 | 1850 | bfd_byte *contents; |
0a1b45a2 | 1851 | bool converted; |
70256ad8 | 1852 | |
0e1862bb | 1853 | if (bfd_link_relocatable (info)) |
0a1b45a2 | 1854 | return true; |
70256ad8 | 1855 | |
0afcef53 | 1856 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 | 1857 | if (htab == NULL) |
afd9acee L |
1858 | { |
1859 | sec->check_relocs_failed = 1; | |
0a1b45a2 | 1860 | return false; |
afd9acee | 1861 | } |
4dfe6ac6 | 1862 | |
fe53b4a4 L |
1863 | BFD_ASSERT (is_x86_elf (abfd, htab)); |
1864 | ||
bedfd056 L |
1865 | /* Get the section contents. */ |
1866 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1867 | contents = elf_section_data (sec)->this_hdr.contents; | |
1868 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1869 | { | |
1870 | sec->check_relocs_failed = 1; | |
0a1b45a2 | 1871 | return false; |
bedfd056 L |
1872 | } |
1873 | ||
0ffa91dd | 1874 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1875 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1876 | |
0a1b45a2 | 1877 | converted = false; |
5e5e02ae | 1878 | |
c434dee6 | 1879 | sreloc = NULL; |
cbe950e9 | 1880 | |
70256ad8 AJ |
1881 | rel_end = relocs + sec->reloc_count; |
1882 | for (rel = relocs; rel < rel_end; rel++) | |
1883 | { | |
bffbf940 | 1884 | unsigned int r_type; |
d42c267e | 1885 | unsigned int r_symndx; |
70256ad8 | 1886 | struct elf_link_hash_entry *h; |
0afcef53 | 1887 | struct elf_x86_link_hash_entry *eh; |
4c544807 L |
1888 | Elf_Internal_Sym *isym; |
1889 | const char *name; | |
0a1b45a2 AM |
1890 | bool size_reloc; |
1891 | bool converted_reloc; | |
1892 | bool no_dynreloc; | |
70256ad8 | 1893 | |
351f65ca L |
1894 | r_symndx = htab->r_sym (rel->r_info); |
1895 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1896 | |
1897 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1898 | { | |
695344c0 | 1899 | /* xgettext:c-format */ |
871b3ab2 | 1900 | _bfd_error_handler (_("%pB: bad symbol index: %d"), |
4eca0228 | 1901 | abfd, r_symndx); |
afd9acee | 1902 | goto error_return; |
c434dee6 AJ |
1903 | } |
1904 | ||
70256ad8 | 1905 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1906 | { |
1907 | /* A local symbol. */ | |
f1dfbfdb | 1908 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, |
c2e61a4e L |
1909 | abfd, r_symndx); |
1910 | if (isym == NULL) | |
afd9acee | 1911 | goto error_return; |
c25bc9fc L |
1912 | |
1913 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1914 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1915 | { |
0afcef53 | 1916 | h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, |
0a1b45a2 | 1917 | true); |
c25bc9fc | 1918 | if (h == NULL) |
afd9acee | 1919 | goto error_return; |
6bbec505 | 1920 | |
c25bc9fc | 1921 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
1922 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
1923 | isym, NULL); | |
c25bc9fc L |
1924 | h->type = STT_GNU_IFUNC; |
1925 | h->def_regular = 1; | |
1926 | h->ref_regular = 1; | |
1927 | h->forced_local = 1; | |
1928 | h->root.type = bfd_link_hash_defined; | |
1929 | } | |
1930 | else | |
1931 | h = NULL; | |
1932 | } | |
70256ad8 | 1933 | else |
71cb9464 | 1934 | { |
4c544807 | 1935 | isym = NULL; |
71cb9464 L |
1936 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1937 | while (h->root.type == bfd_link_hash_indirect | |
1938 | || h->root.type == bfd_link_hash_warning) | |
1939 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1940 | } |
cbe950e9 | 1941 | |
d1534d16 L |
1942 | /* Check invalid x32 relocations. */ |
1943 | if (!ABI_64_P (abfd)) | |
1944 | switch (r_type) | |
1945 | { | |
1946 | default: | |
1947 | break; | |
1948 | ||
d1534d16 L |
1949 | case R_X86_64_DTPOFF64: |
1950 | case R_X86_64_TPOFF64: | |
1951 | case R_X86_64_PC64: | |
1952 | case R_X86_64_GOTOFF64: | |
1953 | case R_X86_64_GOT64: | |
1954 | case R_X86_64_GOTPCREL64: | |
1955 | case R_X86_64_GOTPC64: | |
1956 | case R_X86_64_GOTPLT64: | |
1957 | case R_X86_64_PLTOFF64: | |
1958 | { | |
1959 | if (h) | |
1960 | name = h->root.root.string; | |
1961 | else | |
1962 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1963 | NULL); | |
4eca0228 | 1964 | _bfd_error_handler |
695344c0 | 1965 | /* xgettext:c-format */ |
871b3ab2 | 1966 | (_("%pB: relocation %s against symbol `%s' isn't " |
d1534d16 L |
1967 | "supported in x32 mode"), abfd, |
1968 | x86_64_elf_howto_table[r_type].name, name); | |
1969 | bfd_set_error (bfd_error_bad_value); | |
afd9acee | 1970 | goto error_return; |
d1534d16 L |
1971 | } |
1972 | break; | |
1973 | } | |
1974 | ||
c25bc9fc L |
1975 | if (h != NULL) |
1976 | { | |
ad1e85de L |
1977 | /* It is referenced by a non-shared object. */ |
1978 | h->ref_regular = 1; | |
71cb9464 | 1979 | } |
70256ad8 | 1980 | |
0a1b45a2 | 1981 | converted_reloc = false; |
6999821f L |
1982 | if ((r_type == R_X86_64_GOTPCREL |
1983 | || r_type == R_X86_64_GOTPCRELX | |
1984 | || r_type == R_X86_64_REX_GOTPCRELX) | |
1985 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
1986 | { | |
1987 | Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel; | |
1988 | if (!elf_x86_64_convert_load_reloc (abfd, contents, &r_type, | |
1989 | irel, h, &converted_reloc, | |
1990 | info)) | |
1991 | goto error_return; | |
5e5e02ae L |
1992 | |
1993 | if (converted_reloc) | |
0a1b45a2 | 1994 | converted = true; |
6999821f L |
1995 | } |
1996 | ||
382aae06 L |
1997 | if (!_bfd_elf_x86_valid_reloc_p (sec, info, htab, rel, h, isym, |
1998 | symtab_hdr, &no_dynreloc)) | |
0a1b45a2 | 1999 | return false; |
382aae06 | 2000 | |
bedfd056 | 2001 | if (! elf_x86_64_tls_transition (info, abfd, sec, contents, |
351f65ca L |
2002 | symtab_hdr, sym_hashes, |
2003 | &r_type, GOT_UNKNOWN, | |
0a1b45a2 | 2004 | rel, rel_end, h, r_symndx, false)) |
afd9acee | 2005 | goto error_return; |
142411ca | 2006 | |
cd048363 L |
2007 | /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */ |
2008 | if (h == htab->elf.hgot) | |
0a1b45a2 | 2009 | htab->got_referenced = true; |
cd048363 | 2010 | |
0afcef53 | 2011 | eh = (struct elf_x86_link_hash_entry *) h; |
bffbf940 | 2012 | switch (r_type) |
70256ad8 | 2013 | { |
bffbf940 | 2014 | case R_X86_64_TLSLD: |
0f09b4d8 | 2015 | htab->tls_ld_or_ldm_got.refcount = 1; |
bffbf940 JJ |
2016 | goto create_got; |
2017 | ||
2018 | case R_X86_64_TPOFF32: | |
0e1862bb | 2019 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
aab921ad | 2020 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2021 | &x86_64_elf_howto_table[r_type]); |
aec6b87e | 2022 | if (eh != NULL) |
98b273dc | 2023 | eh->zero_undefweak &= 0x2; |
bffbf940 | 2024 | break; |
c434dee6 | 2025 | |
bffbf940 | 2026 | case R_X86_64_GOTTPOFF: |
0e1862bb | 2027 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
2028 | info->flags |= DF_STATIC_TLS; |
2029 | /* Fall through */ | |
70256ad8 | 2030 | |
bffbf940 JJ |
2031 | case R_X86_64_GOT32: |
2032 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
2033 | case R_X86_64_GOTPCRELX: |
2034 | case R_X86_64_REX_GOTPCRELX: | |
bffbf940 | 2035 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
2036 | case R_X86_64_GOT64: |
2037 | case R_X86_64_GOTPCREL64: | |
2038 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
2039 | case R_X86_64_GOTPC32_TLSDESC: |
2040 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
2041 | /* This symbol requires a global offset table entry. */ |
2042 | { | |
2043 | int tls_type, old_tls_type; | |
2044 | ||
2045 | switch (r_type) | |
2046 | { | |
382aae06 L |
2047 | default: |
2048 | tls_type = GOT_NORMAL; | |
2049 | if (h) | |
2050 | { | |
2051 | if (ABS_SYMBOL_P (h)) | |
2052 | tls_type = GOT_ABS; | |
2053 | } | |
2054 | else if (isym->st_shndx == SHN_ABS) | |
2055 | tls_type = GOT_ABS; | |
2056 | break; | |
2057 | case R_X86_64_TLSGD: | |
2058 | tls_type = GOT_TLS_GD; | |
2059 | break; | |
2060 | case R_X86_64_GOTTPOFF: | |
2061 | tls_type = GOT_TLS_IE; | |
2062 | break; | |
67a4f2b7 AO |
2063 | case R_X86_64_GOTPC32_TLSDESC: |
2064 | case R_X86_64_TLSDESC_CALL: | |
382aae06 L |
2065 | tls_type = GOT_TLS_GDESC; |
2066 | break; | |
bffbf940 JJ |
2067 | } |
2068 | ||
2069 | if (h != NULL) | |
2070 | { | |
0f09b4d8 | 2071 | h->got.refcount = 1; |
aec6b87e | 2072 | old_tls_type = eh->tls_type; |
bffbf940 JJ |
2073 | } |
2074 | else | |
2075 | { | |
2076 | bfd_signed_vma *local_got_refcounts; | |
2077 | ||
2078 | /* This is a global offset table entry for a local symbol. */ | |
2079 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2080 | if (local_got_refcounts == NULL) | |
2081 | { | |
2082 | bfd_size_type size; | |
2083 | ||
2084 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
2085 | size *= sizeof (bfd_signed_vma) |
2086 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
2087 | local_got_refcounts = ((bfd_signed_vma *) |
2088 | bfd_zalloc (abfd, size)); | |
2089 | if (local_got_refcounts == NULL) | |
afd9acee | 2090 | goto error_return; |
bffbf940 | 2091 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
0afcef53 | 2092 | elf_x86_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 2093 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
0afcef53 | 2094 | elf_x86_local_got_tls_type (abfd) |
67a4f2b7 | 2095 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 | 2096 | } |
0f09b4d8 | 2097 | local_got_refcounts[r_symndx] = 1; |
bffbf940 | 2098 | old_tls_type |
0afcef53 | 2099 | = elf_x86_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
2100 | } |
2101 | ||
2102 | /* If a TLS symbol is accessed using IE at least once, | |
2103 | there is no point to use dynamic model for it. */ | |
2104 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
2105 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
2106 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 2107 | { |
67a4f2b7 | 2108 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 2109 | tls_type = old_tls_type; |
67a4f2b7 AO |
2110 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2111 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2112 | tls_type |= old_tls_type; | |
bffbf940 JJ |
2113 | else |
2114 | { | |
09a24cbf | 2115 | if (h) |
4c544807 L |
2116 | name = h->root.root.string; |
2117 | else | |
2118 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
2119 | isym, NULL); | |
4eca0228 | 2120 | _bfd_error_handler |
695344c0 | 2121 | /* xgettext:c-format */ |
871b3ab2 | 2122 | (_("%pB: '%s' accessed both as normal and" |
63a5468a | 2123 | " thread local symbol"), |
4c544807 | 2124 | abfd, name); |
68c4a57e | 2125 | bfd_set_error (bfd_error_bad_value); |
afd9acee | 2126 | goto error_return; |
bffbf940 JJ |
2127 | } |
2128 | } | |
2129 | ||
2130 | if (old_tls_type != tls_type) | |
2131 | { | |
aec6b87e L |
2132 | if (eh != NULL) |
2133 | eh->tls_type = tls_type; | |
bffbf940 | 2134 | else |
0afcef53 | 2135 | elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
2136 | } |
2137 | } | |
c434dee6 AJ |
2138 | /* Fall through */ |
2139 | ||
d6ab8113 JB |
2140 | case R_X86_64_GOTOFF64: |
2141 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2142 | case R_X86_64_GOTPC64: |
bffbf940 | 2143 | create_got: |
aec6b87e | 2144 | if (eh != NULL) |
98b273dc | 2145 | eh->zero_undefweak &= 0x2; |
70256ad8 AJ |
2146 | break; |
2147 | ||
2148 | case R_X86_64_PLT32: | |
c3320543 | 2149 | case R_X86_64_PLT32_BND: |
70256ad8 | 2150 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
2151 | actually build the entry in adjust_dynamic_symbol, |
2152 | because this might be a case of linking PIC code which is | |
2153 | never referenced by a dynamic object, in which case we | |
2154 | don't need to generate a procedure linkage table entry | |
2155 | after all. */ | |
70256ad8 AJ |
2156 | |
2157 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 2158 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
2159 | if (h == NULL) |
2160 | continue; | |
2161 | ||
98b273dc | 2162 | eh->zero_undefweak &= 0x2; |
f5385ebf | 2163 | h->needs_plt = 1; |
79b0c981 | 2164 | h->plt.refcount = 1; |
70256ad8 AJ |
2165 | break; |
2166 | ||
7b81dfbb AJ |
2167 | case R_X86_64_PLTOFF64: |
2168 | /* This tries to form the 'address' of a function relative | |
2169 | to GOT. For global symbols we need a PLT entry. */ | |
2170 | if (h != NULL) | |
2171 | { | |
2172 | h->needs_plt = 1; | |
79b0c981 | 2173 | h->plt.refcount = 1; |
7b81dfbb AJ |
2174 | } |
2175 | goto create_got; | |
2176 | ||
6a3e1bae L |
2177 | case R_X86_64_SIZE32: |
2178 | case R_X86_64_SIZE64: | |
0a1b45a2 | 2179 | size_reloc = true; |
6a3e1bae L |
2180 | goto do_size; |
2181 | ||
248775ba L |
2182 | case R_X86_64_32: |
2183 | if (!ABI_64_P (abfd)) | |
2184 | goto pointer; | |
1a0670f3 | 2185 | /* Fall through. */ |
cc78d0af AJ |
2186 | case R_X86_64_8: |
2187 | case R_X86_64_16: | |
70256ad8 | 2188 | case R_X86_64_32S: |
338c190a L |
2189 | /* Check relocation overflow as these relocs may lead to |
2190 | run-time relocation overflow. Don't error out for | |
1b71fb54 | 2191 | sections we don't care about, such as debug sections or |
338c190a | 2192 | when relocation overflow check is disabled. */ |
5b9c07b2 | 2193 | if (!htab->params->no_reloc_overflow_check |
6999821f | 2194 | && !converted_reloc |
338c190a L |
2195 | && (bfd_link_pic (info) |
2196 | || (bfd_link_executable (info) | |
2197 | && h != NULL | |
2198 | && !h->def_regular | |
2199 | && h->def_dynamic | |
081b1afe | 2200 | && (sec->flags & SEC_READONLY) == 0))) |
aab921ad | 2201 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2202 | &x86_64_elf_howto_table[r_type]); |
1b71fb54 AJ |
2203 | /* Fall through. */ |
2204 | ||
81e8046d L |
2205 | case R_X86_64_PC8: |
2206 | case R_X86_64_PC16: | |
2207 | case R_X86_64_PC32: | |
2208 | case R_X86_64_PC32_BND: | |
d6ab8113 | 2209 | case R_X86_64_PC64: |
1b71fb54 | 2210 | case R_X86_64_64: |
dc1e8a47 | 2211 | pointer: |
aec6b87e | 2212 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
98b273dc | 2213 | eh->zero_undefweak |= 0x2; |
bf52d7c7 L |
2214 | /* We are called after all symbols have been resolved. Only |
2215 | relocation against STT_GNU_IFUNC symbol must go through | |
2216 | PLT. */ | |
d1ed1c7d L |
2217 | if (h != NULL |
2218 | && (bfd_link_executable (info) | |
bf52d7c7 | 2219 | || h->type == STT_GNU_IFUNC)) |
c434dee6 | 2220 | { |
0a1b45a2 | 2221 | bool func_pointer_ref = false; |
233cc9c1 | 2222 | |
5db4f0d3 L |
2223 | if (r_type == R_X86_64_PC32) |
2224 | { | |
2225 | /* Since something like ".long foo - ." may be used | |
2226 | as pointer, make sure that PLT is used if foo is | |
2227 | a function defined in a shared library. */ | |
2228 | if ((sec->flags & SEC_CODE) == 0) | |
451875b4 L |
2229 | { |
2230 | h->pointer_equality_needed = 1; | |
2231 | if (bfd_link_pie (info) | |
2232 | && h->type == STT_FUNC | |
2233 | && !h->def_regular | |
2234 | && h->def_dynamic) | |
2235 | { | |
2236 | h->needs_plt = 1; | |
2237 | h->plt.refcount = 1; | |
2238 | } | |
2239 | } | |
5db4f0d3 L |
2240 | } |
2241 | else if (r_type != R_X86_64_PC32_BND | |
2242 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
2243 | { |
2244 | h->pointer_equality_needed = 1; | |
2245 | /* At run-time, R_X86_64_64 can be resolved for both | |
2246 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
2247 | can only be resolved for x32. */ | |
2248 | if ((sec->flags & SEC_READONLY) == 0 | |
2249 | && (r_type == R_X86_64_64 | |
2250 | || (!ABI_64_P (abfd) | |
2251 | && (r_type == R_X86_64_32 | |
2252 | || r_type == R_X86_64_32S)))) | |
0a1b45a2 | 2253 | func_pointer_ref = true; |
79b0c981 L |
2254 | } |
2255 | ||
2256 | if (!func_pointer_ref) | |
2257 | { | |
2258 | /* If this reloc is in a read-only section, we might | |
2259 | need a copy reloc. We can't check reliably at this | |
2260 | stage whether the section is read-only, as input | |
2261 | sections have not yet been mapped to output sections. | |
2262 | Tentatively set the flag for now, and correct in | |
2263 | adjust_dynamic_symbol. */ | |
2264 | h->non_got_ref = 1; | |
2265 | ||
2266 | /* We may need a .plt entry if the symbol is a function | |
2267 | defined in a shared lib or is a function referenced | |
2268 | from the code or read-only section. */ | |
2269 | if (!h->def_regular | |
2270 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
2271 | h->plt.refcount = 1; | |
04ebc307 | 2272 | } |
c434dee6 | 2273 | } |
70256ad8 | 2274 | |
0a1b45a2 | 2275 | size_reloc = false; |
dc1e8a47 | 2276 | do_size: |
382aae06 | 2277 | if (!no_dynreloc |
0a1b45a2 | 2278 | && NEED_DYNAMIC_RELOCATION_P (info, true, h, sec, r_type, |
382aae06 | 2279 | htab->pointer_r_type)) |
70256ad8 | 2280 | { |
e03a8ed8 L |
2281 | struct elf_dyn_relocs *p; |
2282 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2283 | |
2284 | /* We must copy these reloc types into the output file. | |
2285 | Create a reloc section in dynobj and make room for | |
2286 | this reloc. */ | |
70256ad8 AJ |
2287 | if (sreloc == NULL) |
2288 | { | |
83bac4b0 | 2289 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 | 2290 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
0a1b45a2 | 2291 | abfd, /*rela?*/ true); |
70256ad8 | 2292 | |
70256ad8 | 2293 | if (sreloc == NULL) |
afd9acee | 2294 | goto error_return; |
70256ad8 AJ |
2295 | } |
2296 | ||
c434dee6 AJ |
2297 | /* If this is a global symbol, we count the number of |
2298 | relocations we need for this symbol. */ | |
2299 | if (h != NULL) | |
190eb1dd | 2300 | head = &h->dyn_relocs; |
c434dee6 AJ |
2301 | else |
2302 | { | |
2303 | /* Track dynamic relocs needed for local syms too. | |
2304 | We really need local syms available to do this | |
2305 | easily. Oh well. */ | |
c434dee6 | 2306 | asection *s; |
87d72d41 | 2307 | void **vpp; |
87d72d41 | 2308 | |
f1dfbfdb | 2309 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, |
87d72d41 AM |
2310 | abfd, r_symndx); |
2311 | if (isym == NULL) | |
afd9acee | 2312 | goto error_return; |
87d72d41 AM |
2313 | |
2314 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2315 | if (s == NULL) |
87d72d41 | 2316 | s = sec; |
70256ad8 | 2317 | |
e81d3500 DD |
2318 | /* Beware of type punned pointers vs strict aliasing |
2319 | rules. */ | |
2320 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2321 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2322 | } |
70256ad8 | 2323 | |
c434dee6 AJ |
2324 | p = *head; |
2325 | if (p == NULL || p->sec != sec) | |
2326 | { | |
986f0783 | 2327 | size_t amt = sizeof *p; |
d8045f23 | 2328 | |
e03a8ed8 | 2329 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2330 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2331 | if (p == NULL) |
afd9acee | 2332 | goto error_return; |
c434dee6 AJ |
2333 | p->next = *head; |
2334 | *head = p; | |
2335 | p->sec = sec; | |
2336 | p->count = 0; | |
2337 | p->pc_count = 0; | |
70256ad8 | 2338 | } |
c434dee6 AJ |
2339 | |
2340 | p->count += 1; | |
06a6a421 | 2341 | /* Count size relocation as PC-relative relocation. */ |
daf1c414 | 2342 | if (X86_PCREL_TYPE_P (r_type) || size_reloc) |
c434dee6 | 2343 | p->pc_count += 1; |
70256ad8 AJ |
2344 | } |
2345 | break; | |
fe4770f4 AJ |
2346 | |
2347 | /* This relocation describes the C++ object vtable hierarchy. | |
2348 | Reconstruct it for later use during GC. */ | |
2349 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2350 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
afd9acee | 2351 | goto error_return; |
fe4770f4 AJ |
2352 | break; |
2353 | ||
2354 | /* This relocation describes which C++ vtable entries are actually | |
2355 | used. Record for later use during GC. */ | |
2356 | case R_X86_64_GNU_VTENTRY: | |
a0ea3a14 | 2357 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
afd9acee | 2358 | goto error_return; |
fe4770f4 | 2359 | break; |
c434dee6 AJ |
2360 | |
2361 | default: | |
2362 | break; | |
70256ad8 AJ |
2363 | } |
2364 | } | |
2365 | ||
bedfd056 L |
2366 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2367 | { | |
5e5e02ae | 2368 | if (!converted && !info->keep_memory) |
bedfd056 L |
2369 | free (contents); |
2370 | else | |
2371 | { | |
5e5e02ae L |
2372 | /* Cache the section contents for elf_link_input_bfd if any |
2373 | load is converted or --no-keep-memory isn't used. */ | |
bedfd056 L |
2374 | elf_section_data (sec)->this_hdr.contents = contents; |
2375 | } | |
2376 | } | |
2377 | ||
5e5e02ae L |
2378 | /* Cache relocations if any load is converted. */ |
2379 | if (elf_section_data (sec)->relocs != relocs && converted) | |
2380 | elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs; | |
2381 | ||
0a1b45a2 | 2382 | return true; |
afd9acee | 2383 | |
dc1e8a47 | 2384 | error_return: |
bedfd056 L |
2385 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2386 | free (contents); | |
afd9acee | 2387 | sec->check_relocs_failed = 1; |
0a1b45a2 | 2388 | return false; |
70256ad8 AJ |
2389 | } |
2390 | ||
bffbf940 JJ |
2391 | /* Return the relocation value for @tpoff relocation |
2392 | if STT_TLS virtual address is ADDRESS. */ | |
2393 | ||
2394 | static bfd_vma | |
351f65ca | 2395 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 2396 | { |
e1918d23 | 2397 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
2398 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
2399 | bfd_vma static_tls_size; | |
bffbf940 JJ |
2400 | |
2401 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 2402 | if (htab->tls_sec == NULL) |
bffbf940 | 2403 | return 0; |
7dc98aea RO |
2404 | |
2405 | /* Consider special static TLS alignment requirements. */ | |
2406 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
2407 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
2408 | } |
2409 | ||
8d88c4ca NC |
2410 | /* Relocate an x86_64 ELF section. */ |
2411 | ||
0f684201 | 2412 | static int |
351f65ca L |
2413 | elf_x86_64_relocate_section (bfd *output_bfd, |
2414 | struct bfd_link_info *info, | |
2415 | bfd *input_bfd, | |
2416 | asection *input_section, | |
2417 | bfd_byte *contents, | |
2418 | Elf_Internal_Rela *relocs, | |
2419 | Elf_Internal_Sym *local_syms, | |
2420 | asection **local_sections) | |
8d88c4ca | 2421 | { |
0afcef53 | 2422 | struct elf_x86_link_hash_table *htab; |
8d88c4ca NC |
2423 | Elf_Internal_Shdr *symtab_hdr; |
2424 | struct elf_link_hash_entry **sym_hashes; | |
2425 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2426 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 2427 | Elf_Internal_Rela *rel; |
60f2e42e | 2428 | Elf_Internal_Rela *wrel; |
8d88c4ca | 2429 | Elf_Internal_Rela *relend; |
38b12349 | 2430 | unsigned int plt_entry_size; |
0a1b45a2 | 2431 | bool status; |
8d88c4ca | 2432 | |
338c190a L |
2433 | /* Skip if check_relocs failed. */ |
2434 | if (input_section->check_relocs_failed) | |
0a1b45a2 | 2435 | return false; |
338c190a | 2436 | |
0afcef53 | 2437 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 | 2438 | if (htab == NULL) |
0a1b45a2 | 2439 | return false; |
fe53b4a4 | 2440 | |
7af5d5c4 AM |
2441 | if (!is_x86_elf (input_bfd, htab)) |
2442 | { | |
2443 | bfd_set_error (bfd_error_wrong_format); | |
0a1b45a2 | 2444 | return false; |
7af5d5c4 | 2445 | } |
fe53b4a4 | 2446 | |
765e526c | 2447 | plt_entry_size = htab->plt.plt_entry_size; |
0ffa91dd | 2448 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
2449 | sym_hashes = elf_sym_hashes (input_bfd); |
2450 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
0afcef53 | 2451 | local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 2452 | |
0afcef53 | 2453 | _bfd_x86_elf_set_tls_module_base (info); |
9f03412a | 2454 | |
0a1b45a2 | 2455 | status = true; |
60f2e42e | 2456 | rel = wrel = relocs; |
8d88c4ca | 2457 | relend = relocs + input_section->reloc_count; |
60f2e42e | 2458 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 2459 | { |
419414ea | 2460 | unsigned int r_type, r_type_tls; |
8d88c4ca NC |
2461 | reloc_howto_type *howto; |
2462 | unsigned long r_symndx; | |
2463 | struct elf_link_hash_entry *h; | |
0afcef53 | 2464 | struct elf_x86_link_hash_entry *eh; |
8d88c4ca NC |
2465 | Elf_Internal_Sym *sym; |
2466 | asection *sec; | |
0ff2b86e | 2467 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 2468 | bfd_vma relocation; |
0a1b45a2 | 2469 | bool unresolved_reloc; |
8d88c4ca | 2470 | bfd_reloc_status_type r; |
bffbf940 | 2471 | int tls_type; |
0ff2b86e | 2472 | asection *base_got, *resolved_plt; |
1788fc08 | 2473 | bfd_vma st_size; |
0a1b45a2 AM |
2474 | bool resolved_to_zero; |
2475 | bool relative_reloc; | |
2476 | bool converted_reloc; | |
2477 | bool need_copy_reloc_in_pie; | |
2478 | bool no_copyreloc_p; | |
8d88c4ca | 2479 | |
351f65ca | 2480 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
2481 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
2482 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
2483 | { |
2484 | if (wrel != rel) | |
2485 | *wrel = *rel; | |
2486 | continue; | |
2487 | } | |
8d88c4ca | 2488 | |
b638b5d5 | 2489 | r_symndx = htab->r_sym (rel->r_info); |
78984959 | 2490 | converted_reloc = (r_type & R_X86_64_converted_reloc_bit) != 0; |
b638b5d5 L |
2491 | if (converted_reloc) |
2492 | { | |
2493 | r_type &= ~R_X86_64_converted_reloc_bit; | |
2494 | rel->r_info = htab->r_info (r_symndx, r_type); | |
2495 | } | |
78984959 | 2496 | |
76268e02 L |
2497 | howto = elf_x86_64_rtype_to_howto (input_bfd, r_type); |
2498 | if (howto == NULL) | |
47aeb64c | 2499 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
8d88c4ca | 2500 | |
8d88c4ca NC |
2501 | h = NULL; |
2502 | sym = NULL; | |
2503 | sec = NULL; | |
0a1b45a2 | 2504 | unresolved_reloc = false; |
8d88c4ca | 2505 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
2506 | { |
2507 | sym = local_syms + r_symndx; | |
2508 | sec = local_sections[r_symndx]; | |
c434dee6 | 2509 | |
c25bc9fc L |
2510 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
2511 | &sec, rel); | |
1788fc08 | 2512 | st_size = sym->st_size; |
c25bc9fc L |
2513 | |
2514 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 2515 | if (!bfd_link_relocatable (info) |
351f65ca | 2516 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 2517 | { |
0afcef53 | 2518 | h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, |
0a1b45a2 | 2519 | rel, false); |
c25bc9fc L |
2520 | if (h == NULL) |
2521 | abort (); | |
2522 | ||
eed180f8 | 2523 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
2524 | h->root.u.def.value = sym->st_value; |
2525 | h->root.u.def.section = sec; | |
2526 | } | |
8da6118f | 2527 | } |
8d88c4ca | 2528 | else |
8da6118f | 2529 | { |
0a1b45a2 AM |
2530 | bool warned ATTRIBUTE_UNUSED; |
2531 | bool ignored ATTRIBUTE_UNUSED; | |
c434dee6 | 2532 | |
b2a8e766 AM |
2533 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2534 | r_symndx, symtab_hdr, sym_hashes, | |
2535 | h, sec, relocation, | |
62d887d4 | 2536 | unresolved_reloc, warned, ignored); |
1788fc08 | 2537 | st_size = h->size; |
8da6118f | 2538 | } |
ab96bf03 | 2539 | |
dbaa2011 | 2540 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
2541 | { |
2542 | _bfd_clear_contents (howto, input_bfd, input_section, | |
0930cb30 | 2543 | contents, rel->r_offset); |
60f2e42e L |
2544 | wrel->r_offset = rel->r_offset; |
2545 | wrel->r_info = 0; | |
2546 | wrel->r_addend = 0; | |
2547 | ||
2548 | /* For ld -r, remove relocations in debug sections against | |
2549 | sections defined in discarded sections. Not done for | |
2550 | eh_frame editing code expects to be present. */ | |
2551 | if (bfd_link_relocatable (info) | |
2552 | && (input_section->flags & SEC_DEBUGGING)) | |
2553 | wrel--; | |
2554 | ||
2555 | continue; | |
2556 | } | |
ab96bf03 | 2557 | |
0e1862bb | 2558 | if (bfd_link_relocatable (info)) |
2d5da473 L |
2559 | { |
2560 | if (wrel != rel) | |
2561 | *wrel = *rel; | |
2562 | continue; | |
2563 | } | |
ab96bf03 | 2564 | |
1788fc08 | 2565 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 2566 | { |
1788fc08 L |
2567 | if (r_type == R_X86_64_64) |
2568 | { | |
2569 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
2570 | zero-extend it to 64bit if addend is zero. */ | |
2571 | r_type = R_X86_64_32; | |
2572 | memset (contents + rel->r_offset + 4, 0, 4); | |
2573 | } | |
2574 | else if (r_type == R_X86_64_SIZE64) | |
2575 | { | |
2576 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
2577 | zero-extend it to 64bit if addend is zero. */ | |
2578 | r_type = R_X86_64_SIZE32; | |
2579 | memset (contents + rel->r_offset + 4, 0, 4); | |
2580 | } | |
64d25c44 L |
2581 | } |
2582 | ||
0afcef53 | 2583 | eh = (struct elf_x86_link_hash_entry *) h; |
0ff2b86e | 2584 | |
cbe950e9 L |
2585 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
2586 | it here if it is defined in a non-shared object. */ | |
2587 | if (h != NULL | |
2588 | && h->type == STT_GNU_IFUNC | |
2589 | && h->def_regular) | |
2590 | { | |
cbe950e9 | 2591 | bfd_vma plt_index; |
4c544807 | 2592 | const char *name; |
cbe950e9 | 2593 | |
97dc35c8 L |
2594 | if ((input_section->flags & SEC_ALLOC) == 0) |
2595 | { | |
347a8774 L |
2596 | /* If this is a SHT_NOTE section without SHF_ALLOC, treat |
2597 | STT_GNU_IFUNC symbol as STT_FUNC. */ | |
2598 | if (elf_section_type (input_section) == SHT_NOTE) | |
2599 | goto skip_ifunc; | |
97dc35c8 L |
2600 | /* Dynamic relocs are not propagated for SEC_DEBUGGING |
2601 | sections because such sections are not SEC_ALLOC and | |
2602 | thus ld.so will not process them. */ | |
2603 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 2604 | continue; |
97dc35c8 L |
2605 | abort (); |
2606 | } | |
233cc9c1 L |
2607 | |
2608 | switch (r_type) | |
2609 | { | |
2610 | default: | |
2611 | break; | |
2612 | ||
2613 | case R_X86_64_GOTPCREL: | |
2614 | case R_X86_64_GOTPCRELX: | |
2615 | case R_X86_64_REX_GOTPCRELX: | |
2616 | case R_X86_64_GOTPCREL64: | |
2617 | base_got = htab->elf.sgot; | |
2618 | off = h->got.offset; | |
2619 | ||
2620 | if (base_got == NULL) | |
2621 | abort (); | |
2622 | ||
2623 | if (off == (bfd_vma) -1) | |
2624 | { | |
2625 | /* We can't use h->got.offset here to save state, or | |
2626 | even just remember the offset, as finish_dynamic_symbol | |
2627 | would use that as offset into .got. */ | |
2628 | ||
2629 | if (h->plt.offset == (bfd_vma) -1) | |
2630 | abort (); | |
2631 | ||
2632 | if (htab->elf.splt != NULL) | |
2633 | { | |
38b12349 | 2634 | plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2635 | - htab->plt.has_plt0); |
233cc9c1 L |
2636 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
2637 | base_got = htab->elf.sgotplt; | |
2638 | } | |
2639 | else | |
2640 | { | |
2641 | plt_index = h->plt.offset / plt_entry_size; | |
2642 | off = plt_index * GOT_ENTRY_SIZE; | |
2643 | base_got = htab->elf.igotplt; | |
2644 | } | |
2645 | ||
2646 | if (h->dynindx == -1 | |
2647 | || h->forced_local | |
2648 | || info->symbolic) | |
2649 | { | |
2650 | /* This references the local defitionion. We must | |
2651 | initialize this entry in the global offset table. | |
2652 | Since the offset must always be a multiple of 8, | |
2653 | we use the least significant bit to record | |
2654 | whether we have initialized it already. | |
2655 | ||
2656 | When doing a dynamic link, we create a .rela.got | |
2657 | relocation entry to initialize the value. This | |
2658 | is done in the finish_dynamic_symbol routine. */ | |
2659 | if ((off & 1) != 0) | |
2660 | off &= ~1; | |
2661 | else | |
2662 | { | |
2663 | bfd_put_64 (output_bfd, relocation, | |
2664 | base_got->contents + off); | |
2665 | /* Note that this is harmless for the GOTPLT64 | |
2666 | case, as -1 | 1 still is -1. */ | |
2667 | h->got.offset |= 1; | |
2668 | } | |
2669 | } | |
2670 | } | |
2671 | ||
2672 | relocation = (base_got->output_section->vma | |
2673 | + base_got->output_offset + off); | |
2674 | ||
2675 | goto do_relocation; | |
2676 | } | |
2677 | ||
2678 | if (h->plt.offset == (bfd_vma) -1) | |
2679 | { | |
2680 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
2681 | if (r_type == htab->pointer_r_type | |
2682 | && (input_section->flags & SEC_CODE) == 0) | |
2683 | goto do_ifunc_pointer; | |
2684 | goto bad_ifunc_reloc; | |
2685 | } | |
cbe950e9 L |
2686 | |
2687 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
2688 | if (htab->elf.splt != NULL) |
2689 | { | |
f2c29a16 | 2690 | if (htab->plt_second != NULL) |
0ff2b86e | 2691 | { |
f2c29a16 L |
2692 | resolved_plt = htab->plt_second; |
2693 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
2694 | } |
2695 | else | |
2696 | { | |
2697 | resolved_plt = htab->elf.splt; | |
2698 | plt_offset = h->plt.offset; | |
2699 | } | |
2700 | } | |
2701 | else | |
2702 | { | |
2703 | resolved_plt = htab->elf.iplt; | |
2704 | plt_offset = h->plt.offset; | |
2705 | } | |
2706 | ||
2707 | relocation = (resolved_plt->output_section->vma | |
2708 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
2709 | |
2710 | switch (r_type) | |
2711 | { | |
2712 | default: | |
dc1e8a47 | 2713 | bad_ifunc_reloc: |
4c544807 L |
2714 | if (h->root.root.string) |
2715 | name = h->root.root.string; | |
2716 | else | |
2717 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
2718 | NULL); | |
4eca0228 | 2719 | _bfd_error_handler |
695344c0 | 2720 | /* xgettext:c-format */ |
871b3ab2 | 2721 | (_("%pB: relocation %s against STT_GNU_IFUNC " |
233cc9c1 L |
2722 | "symbol `%s' isn't supported"), input_bfd, |
2723 | howto->name, name); | |
cbe950e9 | 2724 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 2725 | return false; |
cbe950e9 L |
2726 | |
2727 | case R_X86_64_32S: | |
0e1862bb | 2728 | if (bfd_link_pic (info)) |
cbe950e9 | 2729 | abort (); |
710ab287 L |
2730 | goto do_relocation; |
2731 | ||
248775ba L |
2732 | case R_X86_64_32: |
2733 | if (ABI_64_P (output_bfd)) | |
2734 | goto do_relocation; | |
17672001 | 2735 | /* FALLTHROUGH */ |
eed180f8 | 2736 | case R_X86_64_64: |
dc1e8a47 | 2737 | do_ifunc_pointer: |
710ab287 L |
2738 | if (rel->r_addend != 0) |
2739 | { | |
4c544807 L |
2740 | if (h->root.root.string) |
2741 | name = h->root.root.string; | |
2742 | else | |
2743 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
2744 | sym, NULL); | |
4eca0228 | 2745 | _bfd_error_handler |
695344c0 | 2746 | /* xgettext:c-format */ |
871b3ab2 | 2747 | (_("%pB: relocation %s against STT_GNU_IFUNC " |
2dcf00ce AM |
2748 | "symbol `%s' has non-zero addend: %" PRId64), |
2749 | input_bfd, howto->name, name, (int64_t) rel->r_addend); | |
710ab287 | 2750 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 2751 | return false; |
710ab287 L |
2752 | } |
2753 | ||
2754 | /* Generate dynamic relcoation only when there is a | |
233cc9c1 L |
2755 | non-GOT reference in a shared object or there is no |
2756 | PLT. */ | |
2757 | if ((bfd_link_pic (info) && h->non_got_ref) | |
2758 | || h->plt.offset == (bfd_vma) -1) | |
710ab287 L |
2759 | { |
2760 | Elf_Internal_Rela outrel; | |
710ab287 L |
2761 | asection *sreloc; |
2762 | ||
c25bc9fc L |
2763 | /* Need a dynamic relocation to get the real function |
2764 | address. */ | |
710ab287 L |
2765 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
2766 | info, | |
2767 | input_section, | |
2768 | rel->r_offset); | |
2769 | if (outrel.r_offset == (bfd_vma) -1 | |
2770 | || outrel.r_offset == (bfd_vma) -2) | |
2771 | abort (); | |
2772 | ||
2773 | outrel.r_offset += (input_section->output_section->vma | |
2774 | + input_section->output_offset); | |
2775 | ||
cf1070f1 | 2776 | if (POINTER_LOCAL_IFUNC_P (info, h)) |
710ab287 | 2777 | { |
871b3ab2 | 2778 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
2779 | h->root.root.string, |
2780 | h->root.u.def.section->owner); | |
2781 | ||
710ab287 | 2782 | /* This symbol is resolved locally. */ |
56b8aada L |
2783 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
2784 | outrel.r_addend = (h->root.u.def.value | |
2785 | + h->root.u.def.section->output_section->vma | |
2786 | + h->root.u.def.section->output_offset); | |
68b00778 L |
2787 | |
2788 | if (htab->params->report_relative_reloc) | |
2789 | _bfd_x86_elf_link_report_relative_reloc | |
2790 | (info, input_section, h, sym, | |
2791 | "R_X86_64_IRELATIVE", &outrel); | |
710ab287 L |
2792 | } |
2793 | else | |
2794 | { | |
351f65ca | 2795 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
2796 | outrel.r_addend = 0; |
2797 | } | |
2798 | ||
233cc9c1 L |
2799 | /* Dynamic relocations are stored in |
2800 | 1. .rela.ifunc section in PIC object. | |
2801 | 2. .rela.got section in dynamic executable. | |
2802 | 3. .rela.iplt section in static executable. */ | |
2803 | if (bfd_link_pic (info)) | |
2804 | sreloc = htab->elf.irelifunc; | |
2805 | else if (htab->elf.splt != NULL) | |
2806 | sreloc = htab->elf.srelgot; | |
2807 | else | |
2808 | sreloc = htab->elf.irelplt; | |
351f65ca | 2809 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
2810 | |
2811 | /* If this reloc is against an external symbol, we | |
2812 | do not want to fiddle with the addend. Otherwise, | |
2813 | we need to include the symbol value so that it | |
2814 | becomes an addend for the dynamic reloc. For an | |
2815 | internal symbol, we have updated addend. */ | |
56b8aada | 2816 | continue; |
710ab287 | 2817 | } |
17672001 | 2818 | /* FALLTHROUGH */ |
cbe950e9 | 2819 | case R_X86_64_PC32: |
c3320543 | 2820 | case R_X86_64_PC32_BND: |
cbe950e9 L |
2821 | case R_X86_64_PC64: |
2822 | case R_X86_64_PLT32: | |
c3320543 | 2823 | case R_X86_64_PLT32_BND: |
cbe950e9 | 2824 | goto do_relocation; |
cbe950e9 L |
2825 | } |
2826 | } | |
2827 | ||
dc1e8a47 | 2828 | skip_ifunc: |
aec6b87e | 2829 | resolved_to_zero = (eh != NULL |
c5bce5c6 | 2830 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh)); |
aec6b87e | 2831 | |
70256ad8 AJ |
2832 | /* When generating a shared object, the relocations handled here are |
2833 | copied into the output file to be resolved at run time. */ | |
2834 | switch (r_type) | |
2835 | { | |
2836 | case R_X86_64_GOT32: | |
7b81dfbb | 2837 | case R_X86_64_GOT64: |
70256ad8 AJ |
2838 | /* Relocation is to the entry for this symbol in the global |
2839 | offset table. */ | |
70256ad8 | 2840 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
2841 | case R_X86_64_GOTPCRELX: |
2842 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
2843 | case R_X86_64_GOTPCREL64: |
2844 | /* Use global offset table entry as symbol value. */ | |
2845 | case R_X86_64_GOTPLT64: | |
de194d85 | 2846 | /* This is obsolete and treated the same as GOT64. */ |
6de2ae4a | 2847 | base_got = htab->elf.sgot; |
7b81dfbb | 2848 | |
6de2ae4a | 2849 | if (htab->elf.sgot == NULL) |
c434dee6 | 2850 | abort (); |
053579d7 | 2851 | |
0a1b45a2 | 2852 | relative_reloc = false; |
51e0a107 | 2853 | if (h != NULL) |
70256ad8 | 2854 | { |
c434dee6 | 2855 | off = h->got.offset; |
7b81dfbb | 2856 | if (h->needs_plt |
eed180f8 | 2857 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
2858 | && off == (bfd_vma)-1) |
2859 | { | |
2860 | /* We can't use h->got.offset here to save | |
2861 | state, or even just remember the offset, as | |
2862 | finish_dynamic_symbol would use that as offset into | |
2863 | .got. */ | |
38b12349 | 2864 | bfd_vma plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2865 | - htab->plt.has_plt0); |
7b81dfbb | 2866 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 2867 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
2868 | } |
2869 | ||
2eba97c2 | 2870 | if (RESOLVED_LOCALLY_P (info, h, htab)) |
51e0a107 | 2871 | { |
2eba97c2 L |
2872 | /* We must initialize this entry in the global offset |
2873 | table. Since the offset must always be a multiple | |
2874 | of 8, we use the least significant bit to record | |
2875 | whether we have initialized it already. | |
51e0a107 JH |
2876 | |
2877 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
2878 | relocation entry to initialize the value. This is |
2879 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
2880 | if ((off & 1) != 0) |
2881 | off &= ~1; | |
2882 | else | |
2883 | { | |
2884 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
2885 | base_got->contents + off); |
2886 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 2887 | as -1 | 1 still is -1. */ |
51e0a107 | 2888 | h->got.offset |= 1; |
9e9821dd | 2889 | |
f70656b2 | 2890 | if (GENERATE_RELATIVE_RELOC_P (info, h)) |
9e9821dd L |
2891 | { |
2892 | /* If this symbol isn't dynamic in PIC, | |
2893 | generate R_X86_64_RELATIVE here. */ | |
2894 | eh->no_finish_dynamic_symbol = 1; | |
0a1b45a2 | 2895 | relative_reloc = true; |
9e9821dd | 2896 | } |
51e0a107 JH |
2897 | } |
2898 | } | |
053579d7 | 2899 | else |
0a1b45a2 | 2900 | unresolved_reloc = false; |
70256ad8 | 2901 | } |
51e0a107 JH |
2902 | else |
2903 | { | |
c434dee6 AJ |
2904 | if (local_got_offsets == NULL) |
2905 | abort (); | |
51e0a107 JH |
2906 | |
2907 | off = local_got_offsets[r_symndx]; | |
2908 | ||
2909 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
2910 | the least significant bit to record whether we have |
2911 | already generated the necessary reloc. */ | |
51e0a107 JH |
2912 | if ((off & 1) != 0) |
2913 | off &= ~1; | |
2914 | else | |
2915 | { | |
c434dee6 | 2916 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 2917 | base_got->contents + off); |
9e9821dd | 2918 | local_got_offsets[r_symndx] |= 1; |
51e0a107 | 2919 | |
382aae06 L |
2920 | /* NB: GOTPCREL relocations against local absolute |
2921 | symbol store relocation value in the GOT slot | |
2922 | without relative relocation. */ | |
2923 | if (bfd_link_pic (info) | |
2924 | && !(sym->st_shndx == SHN_ABS | |
2925 | && (r_type == R_X86_64_GOTPCREL | |
2926 | || r_type == R_X86_64_GOTPCRELX | |
2927 | || r_type == R_X86_64_REX_GOTPCRELX))) | |
0a1b45a2 | 2928 | relative_reloc = true; |
51e0a107 | 2929 | } |
51e0a107 | 2930 | } |
6a2bda3f | 2931 | |
9e9821dd L |
2932 | if (relative_reloc) |
2933 | { | |
2934 | asection *s; | |
2935 | Elf_Internal_Rela outrel; | |
2936 | ||
2937 | /* We need to generate a R_X86_64_RELATIVE reloc | |
2938 | for the dynamic linker. */ | |
2939 | s = htab->elf.srelgot; | |
2940 | if (s == NULL) | |
2941 | abort (); | |
2942 | ||
2943 | outrel.r_offset = (base_got->output_section->vma | |
2944 | + base_got->output_offset | |
2945 | + off); | |
2946 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); | |
2947 | outrel.r_addend = relocation; | |
68b00778 L |
2948 | |
2949 | if (htab->params->report_relative_reloc) | |
2950 | _bfd_x86_elf_link_report_relative_reloc | |
2951 | (info, input_section, h, sym, "R_X86_64_RELATIVE", | |
2952 | &outrel); | |
2953 | ||
9e9821dd L |
2954 | elf_append_rela (output_bfd, s, &outrel); |
2955 | } | |
2956 | ||
c434dee6 AJ |
2957 | if (off >= (bfd_vma) -2) |
2958 | abort (); | |
2959 | ||
7b81dfbb AJ |
2960 | relocation = base_got->output_section->vma |
2961 | + base_got->output_offset + off; | |
56ceb5b5 L |
2962 | if (r_type != R_X86_64_GOTPCREL |
2963 | && r_type != R_X86_64_GOTPCRELX | |
2964 | && r_type != R_X86_64_REX_GOTPCRELX | |
2965 | && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
2966 | relocation -= htab->elf.sgotplt->output_section->vma |
2967 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 2968 | |
70256ad8 AJ |
2969 | break; |
2970 | ||
d6ab8113 JB |
2971 | case R_X86_64_GOTOFF64: |
2972 | /* Relocation is relative to the start of the global offset | |
2973 | table. */ | |
2974 | ||
3d949995 L |
2975 | /* Check to make sure it isn't a protected function or data |
2976 | symbol for shared library since it may not be local when | |
e3c0e327 L |
2977 | used as function address or with copy relocation. We also |
2978 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 2979 | if (bfd_link_pic (info) && h) |
d6ab8113 | 2980 | { |
e3c0e327 L |
2981 | if (!h->def_regular) |
2982 | { | |
2983 | const char *v; | |
2984 | ||
2985 | switch (ELF_ST_VISIBILITY (h->other)) | |
2986 | { | |
2987 | case STV_HIDDEN: | |
2988 | v = _("hidden symbol"); | |
2989 | break; | |
2990 | case STV_INTERNAL: | |
2991 | v = _("internal symbol"); | |
2992 | break; | |
2993 | case STV_PROTECTED: | |
2994 | v = _("protected symbol"); | |
2995 | break; | |
2996 | default: | |
2997 | v = _("symbol"); | |
2998 | break; | |
2999 | } | |
3000 | ||
4eca0228 | 3001 | _bfd_error_handler |
695344c0 | 3002 | /* xgettext:c-format */ |
871b3ab2 | 3003 | (_("%pB: relocation R_X86_64_GOTOFF64 against undefined %s" |
63a5468a | 3004 | " `%s' can not be used when making a shared object"), |
e3c0e327 L |
3005 | input_bfd, v, h->root.root.string); |
3006 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 3007 | return false; |
e3c0e327 | 3008 | } |
0e1862bb | 3009 | else if (!bfd_link_executable (info) |
6999821f | 3010 | && !SYMBOL_REFERENCES_LOCAL_P (info, h) |
e3c0e327 L |
3011 | && (h->type == STT_FUNC |
3012 | || h->type == STT_OBJECT) | |
3013 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
3014 | { | |
4eca0228 | 3015 | _bfd_error_handler |
da0d12d2 | 3016 | /* xgettext:c-format */ |
871b3ab2 | 3017 | (_("%pB: relocation R_X86_64_GOTOFF64 against protected %s" |
63a5468a | 3018 | " `%s' can not be used when making a shared object"), |
e3c0e327 L |
3019 | input_bfd, |
3020 | h->type == STT_FUNC ? "function" : "data", | |
3021 | h->root.root.string); | |
3022 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 3023 | return false; |
e3c0e327 | 3024 | } |
d6ab8113 JB |
3025 | } |
3026 | ||
3027 | /* Note that sgot is not involved in this | |
3028 | calculation. We always want the start of .got.plt. If we | |
3029 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
3030 | permitted by the ABI, we might have to change this | |
3031 | calculation. */ | |
6de2ae4a L |
3032 | relocation -= htab->elf.sgotplt->output_section->vma |
3033 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3034 | break; |
3035 | ||
3036 | case R_X86_64_GOTPC32: | |
7b81dfbb | 3037 | case R_X86_64_GOTPC64: |
d6ab8113 | 3038 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
3039 | relocation = htab->elf.sgotplt->output_section->vma |
3040 | + htab->elf.sgotplt->output_offset; | |
0a1b45a2 | 3041 | unresolved_reloc = false; |
d6ab8113 | 3042 | break; |
7b81dfbb AJ |
3043 | |
3044 | case R_X86_64_PLTOFF64: | |
3045 | /* Relocation is PLT entry relative to GOT. For local | |
3046 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 3047 | if (h != NULL |
7b81dfbb | 3048 | /* See PLT32 handling. */ |
9d734efa L |
3049 | && (h->plt.offset != (bfd_vma) -1 |
3050 | || eh->plt_got.offset != (bfd_vma) -1) | |
6de2ae4a | 3051 | && htab->elf.splt != NULL) |
7b81dfbb | 3052 | { |
9d734efa L |
3053 | if (eh->plt_got.offset != (bfd_vma) -1) |
3054 | { | |
3055 | /* Use the GOT PLT. */ | |
3056 | resolved_plt = htab->plt_got; | |
3057 | plt_offset = eh->plt_got.offset; | |
3058 | } | |
f2c29a16 | 3059 | else if (htab->plt_second != NULL) |
0ff2b86e | 3060 | { |
f2c29a16 L |
3061 | resolved_plt = htab->plt_second; |
3062 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
3063 | } |
3064 | else | |
3065 | { | |
3066 | resolved_plt = htab->elf.splt; | |
3067 | plt_offset = h->plt.offset; | |
3068 | } | |
3069 | ||
3070 | relocation = (resolved_plt->output_section->vma | |
3071 | + resolved_plt->output_offset | |
3072 | + plt_offset); | |
0a1b45a2 | 3073 | unresolved_reloc = false; |
7b81dfbb AJ |
3074 | } |
3075 | ||
6de2ae4a L |
3076 | relocation -= htab->elf.sgotplt->output_section->vma |
3077 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 3078 | break; |
d6ab8113 | 3079 | |
70256ad8 | 3080 | case R_X86_64_PLT32: |
c3320543 | 3081 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
3082 | /* Relocation is to the entry for this symbol in the |
3083 | procedure linkage table. */ | |
3084 | ||
3085 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 3086 | without using the procedure linkage table. */ |
70256ad8 AJ |
3087 | if (h == NULL) |
3088 | break; | |
3089 | ||
dd7e64d4 L |
3090 | if ((h->plt.offset == (bfd_vma) -1 |
3091 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 3092 | || htab->elf.splt == NULL) |
70256ad8 AJ |
3093 | { |
3094 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
3095 | happens when statically linking PIC code, or when |
3096 | using -Bsymbolic. */ | |
70256ad8 AJ |
3097 | break; |
3098 | } | |
3099 | ||
dc1e8a47 | 3100 | use_plt: |
dd7e64d4 | 3101 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 3102 | { |
f2c29a16 | 3103 | if (htab->plt_second != NULL) |
dd7e64d4 | 3104 | { |
f2c29a16 L |
3105 | resolved_plt = htab->plt_second; |
3106 | plt_offset = eh->plt_second.offset; | |
dd7e64d4 L |
3107 | } |
3108 | else | |
3109 | { | |
3110 | resolved_plt = htab->elf.splt; | |
3111 | plt_offset = h->plt.offset; | |
3112 | } | |
0ff2b86e L |
3113 | } |
3114 | else | |
3115 | { | |
dd7e64d4 L |
3116 | /* Use the GOT PLT. */ |
3117 | resolved_plt = htab->plt_got; | |
3118 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
3119 | } |
3120 | ||
3121 | relocation = (resolved_plt->output_section->vma | |
3122 | + resolved_plt->output_offset | |
3123 | + plt_offset); | |
0a1b45a2 | 3124 | unresolved_reloc = false; |
70256ad8 AJ |
3125 | break; |
3126 | ||
1788fc08 L |
3127 | case R_X86_64_SIZE32: |
3128 | case R_X86_64_SIZE64: | |
1788fc08 L |
3129 | /* Set to symbol size. */ |
3130 | relocation = st_size; | |
3131 | goto direct; | |
3132 | ||
fd8ab9e5 AJ |
3133 | case R_X86_64_PC8: |
3134 | case R_X86_64_PC16: | |
3135 | case R_X86_64_PC32: | |
c3320543 | 3136 | case R_X86_64_PC32_BND: |
81e8046d L |
3137 | /* Don't complain about -fPIC if the symbol is undefined when |
3138 | building executable unless it is unresolved weak symbol, | |
3139 | references a dynamic definition in PIE or -z nocopyreloc | |
3140 | is used. */ | |
3141 | no_copyreloc_p | |
3142 | = (info->nocopyreloc | |
3143 | || (h != NULL | |
3144 | && !h->root.linker_def | |
3145 | && !h->root.ldscript_def | |
3146 | && eh->def_protected | |
3147 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))); | |
3148 | ||
3149 | if ((input_section->flags & SEC_ALLOC) != 0 | |
3150 | && (input_section->flags & SEC_READONLY) != 0 | |
3151 | && h != NULL | |
3152 | && ((bfd_link_executable (info) | |
3153 | && ((h->root.type == bfd_link_hash_undefweak | |
3154 | && (eh == NULL | |
3155 | || !UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, | |
3156 | eh))) | |
3157 | || (bfd_link_pie (info) | |
3158 | && !SYMBOL_DEFINED_NON_SHARED_P (h) | |
3159 | && h->def_dynamic) | |
3160 | || (no_copyreloc_p | |
3161 | && h->def_dynamic | |
3162 | && !(h->root.u.def.section->flags & SEC_CODE)))) | |
3163 | || bfd_link_dll (info))) | |
3164 | { | |
0a1b45a2 | 3165 | bool fail = false; |
81e8046d L |
3166 | if (SYMBOL_REFERENCES_LOCAL_P (info, h)) |
3167 | { | |
3168 | /* Symbol is referenced locally. Make sure it is | |
3169 | defined locally. */ | |
3170 | fail = !SYMBOL_DEFINED_NON_SHARED_P (h); | |
3171 | } | |
3172 | else if (bfd_link_pie (info)) | |
3173 | { | |
3174 | /* We can only use PC-relative relocations in PIE | |
3175 | from non-code sections. */ | |
3176 | if (h->type == STT_FUNC | |
3177 | && (sec->flags & SEC_CODE) != 0) | |
0a1b45a2 | 3178 | fail = true; |
81e8046d L |
3179 | } |
3180 | else if (no_copyreloc_p || bfd_link_dll (info)) | |
3181 | { | |
3182 | /* Symbol doesn't need copy reloc and isn't | |
3183 | referenced locally. Don't allow PC-relative | |
3184 | relocations against default and protected | |
3185 | symbols since address of protected function | |
3186 | and location of protected data may not be in | |
3187 | the shared object. */ | |
3188 | fail = (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3189 | || ELF_ST_VISIBILITY (h->other) == STV_PROTECTED); | |
3190 | } | |
3191 | ||
3192 | if (fail) | |
3193 | return elf_x86_64_need_pic (info, input_bfd, input_section, | |
3194 | h, NULL, NULL, howto); | |
3195 | } | |
451875b4 L |
3196 | /* Since x86-64 has PC-relative PLT, we can use PLT in PIE |
3197 | as function address. */ | |
81e8046d L |
3198 | else if (h != NULL |
3199 | && (input_section->flags & SEC_CODE) == 0 | |
3200 | && bfd_link_pie (info) | |
3201 | && h->type == STT_FUNC | |
3202 | && !h->def_regular | |
3203 | && h->def_dynamic) | |
451875b4 | 3204 | goto use_plt; |
6610a52d L |
3205 | /* Fall through. */ |
3206 | ||
70256ad8 AJ |
3207 | case R_X86_64_8: |
3208 | case R_X86_64_16: | |
3209 | case R_X86_64_32: | |
d6ab8113 | 3210 | case R_X86_64_PC64: |
6b3db546 | 3211 | case R_X86_64_64: |
80643fbc | 3212 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 3213 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 3214 | |
dc1e8a47 | 3215 | direct: |
b1e24c02 | 3216 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
3217 | break; |
3218 | ||
aebcc8ff L |
3219 | need_copy_reloc_in_pie = (bfd_link_pie (info) |
3220 | && h != NULL | |
3221 | && (h->needs_copy | |
3222 | || eh->needs_copy | |
3223 | || (h->root.type | |
3224 | == bfd_link_hash_undefined)) | |
3225 | && (X86_PCREL_TYPE_P (r_type) | |
3226 | || X86_SIZE_TYPE_P (r_type))); | |
3227 | ||
382aae06 | 3228 | if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type, sec, |
aebcc8ff | 3229 | need_copy_reloc_in_pie, |
0a1b45a2 | 3230 | resolved_to_zero, false)) |
70256ad8 AJ |
3231 | { |
3232 | Elf_Internal_Rela outrel; | |
0a1b45a2 | 3233 | bool skip, relocate; |
c434dee6 | 3234 | asection *sreloc; |
68b00778 | 3235 | const char *relative_reloc_name = NULL; |
70256ad8 AJ |
3236 | |
3237 | /* When generating a shared object, these relocations | |
3238 | are copied into the output file to be resolved at run | |
407443a3 | 3239 | time. */ |
0a1b45a2 AM |
3240 | skip = false; |
3241 | relocate = false; | |
70256ad8 | 3242 | |
c629eae0 JJ |
3243 | outrel.r_offset = |
3244 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 3245 | rel->r_offset); |
c629eae0 | 3246 | if (outrel.r_offset == (bfd_vma) -1) |
0a1b45a2 | 3247 | skip = true; |
0fb19cbc | 3248 | else if (outrel.r_offset == (bfd_vma) -2) |
0a1b45a2 | 3249 | skip = true, relocate = true; |
70256ad8 AJ |
3250 | |
3251 | outrel.r_offset += (input_section->output_section->vma | |
3252 | + input_section->output_offset); | |
3253 | ||
3254 | if (skip) | |
0bb2d96a | 3255 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 3256 | |
e74399c4 | 3257 | else if (COPY_INPUT_RELOC_P (info, h, r_type)) |
70256ad8 | 3258 | { |
351f65ca | 3259 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 3260 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
3261 | } |
3262 | else | |
3263 | { | |
4c10bbaa L |
3264 | /* This symbol is local, or marked to become local. |
3265 | When relocation overflow check is disabled, we | |
3266 | convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
3267 | if (r_type == htab->pointer_r_type | |
3268 | || (r_type == R_X86_64_32 | |
5b9c07b2 | 3269 | && htab->params->no_reloc_overflow_check)) |
607c0e09 | 3270 | { |
0a1b45a2 | 3271 | relocate = true; |
351f65ca | 3272 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 | 3273 | outrel.r_addend = relocation + rel->r_addend; |
68b00778 | 3274 | relative_reloc_name = "R_X86_64_RELATIVE"; |
607c0e09 | 3275 | } |
64d25c44 L |
3276 | else if (r_type == R_X86_64_64 |
3277 | && !ABI_64_P (output_bfd)) | |
3278 | { | |
0a1b45a2 | 3279 | relocate = true; |
64d25c44 L |
3280 | outrel.r_info = htab->r_info (0, |
3281 | R_X86_64_RELATIVE64); | |
3282 | outrel.r_addend = relocation + rel->r_addend; | |
68b00778 | 3283 | relative_reloc_name = "R_X86_64_RELATIVE64"; |
8cf0d2dd L |
3284 | /* Check addend overflow. */ |
3285 | if ((outrel.r_addend & 0x80000000) | |
3286 | != (rel->r_addend & 0x80000000)) | |
3287 | { | |
3288 | const char *name; | |
268a8d3a | 3289 | int addend = rel->r_addend; |
8cf0d2dd L |
3290 | if (h && h->root.root.string) |
3291 | name = h->root.root.string; | |
3292 | else | |
3293 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3294 | sym, NULL); | |
d42c267e AM |
3295 | _bfd_error_handler |
3296 | /* xgettext:c-format */ | |
871b3ab2 | 3297 | (_("%pB: addend %s%#x in relocation %s against " |
2dcf00ce AM |
3298 | "symbol `%s' at %#" PRIx64 |
3299 | " in section `%pA' is out of range"), | |
d42c267e | 3300 | input_bfd, addend < 0 ? "-" : "", addend, |
2dcf00ce AM |
3301 | howto->name, name, (uint64_t) rel->r_offset, |
3302 | input_section); | |
8cf0d2dd | 3303 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 3304 | return false; |
8cf0d2dd | 3305 | } |
64d25c44 | 3306 | } |
607c0e09 AS |
3307 | else |
3308 | { | |
3309 | long sindx; | |
3310 | ||
8517fae7 | 3311 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
3312 | sindx = 0; |
3313 | else if (sec == NULL || sec->owner == NULL) | |
3314 | { | |
3315 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 3316 | return false; |
607c0e09 AS |
3317 | } |
3318 | else | |
3319 | { | |
3320 | asection *osec; | |
3321 | ||
74541ad4 AM |
3322 | /* We are turning this relocation into one |
3323 | against a section symbol. It would be | |
3324 | proper to subtract the symbol's value, | |
3325 | osec->vma, from the emitted reloc addend, | |
3326 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
3327 | osec = sec->output_section; |
3328 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
3329 | if (sindx == 0) |
3330 | { | |
3331 | asection *oi = htab->elf.text_index_section; | |
3332 | sindx = elf_section_data (oi)->dynindx; | |
3333 | } | |
3334 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
3335 | } |
3336 | ||
351f65ca | 3337 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
3338 | outrel.r_addend = relocation + rel->r_addend; |
3339 | } | |
70256ad8 AJ |
3340 | } |
3341 | ||
cbe950e9 | 3342 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 3343 | |
62d78908 L |
3344 | if (sreloc == NULL || sreloc->contents == NULL) |
3345 | { | |
3346 | r = bfd_reloc_notsupported; | |
3347 | goto check_relocation_error; | |
3348 | } | |
c434dee6 | 3349 | |
68b00778 L |
3350 | if (relative_reloc_name |
3351 | && htab->params->report_relative_reloc) | |
3352 | _bfd_x86_elf_link_report_relative_reloc | |
3353 | (info, input_section, h, sym, relative_reloc_name, | |
3354 | &outrel); | |
3355 | ||
351f65ca | 3356 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
3357 | |
3358 | /* If this reloc is against an external symbol, we do | |
3359 | not want to fiddle with the addend. Otherwise, we | |
3360 | need to include the symbol value so that it becomes | |
3361 | an addend for the dynamic reloc. */ | |
0f88be7a | 3362 | if (! relocate) |
70256ad8 AJ |
3363 | continue; |
3364 | } | |
3365 | ||
3366 | break; | |
3367 | ||
bffbf940 | 3368 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
3369 | case R_X86_64_GOTPC32_TLSDESC: |
3370 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 3371 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
3372 | tls_type = GOT_UNKNOWN; |
3373 | if (h == NULL && local_got_offsets) | |
0afcef53 | 3374 | tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 3375 | else if (h != NULL) |
0afcef53 | 3376 | tls_type = elf_x86_hash_entry (h)->tls_type; |
142411ca | 3377 | |
419414ea | 3378 | r_type_tls = r_type; |
351f65ca L |
3379 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3380 | input_section, contents, | |
3381 | symtab_hdr, sym_hashes, | |
419414ea | 3382 | &r_type_tls, tls_type, rel, |
0a1b45a2 AM |
3383 | relend, h, r_symndx, true)) |
3384 | return false; | |
bffbf940 | 3385 | |
419414ea | 3386 | if (r_type_tls == R_X86_64_TPOFF32) |
bffbf940 | 3387 | { |
142411ca L |
3388 | bfd_vma roff = rel->r_offset; |
3389 | ||
bffbf940 | 3390 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 3391 | |
419414ea | 3392 | if (r_type == R_X86_64_TLSGD) |
bffbf940 | 3393 | { |
52bc799a | 3394 | /* GD->LE transition. For 64bit, change |
e2cbcd91 L |
3395 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3396 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3397 | or | |
3398 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3399 | .byte 0x66; rex64 | |
3400 | call *__tls_get_addr@GOTPCREL(%rip) | |
3401 | which may be converted to | |
3402 | addr32 call __tls_get_addr | |
52bc799a | 3403 | into: |
e2cbcd91 L |
3404 | movq %fs:0, %rax |
3405 | leaq foo@tpoff(%rax), %rax | |
52bc799a | 3406 | For 32bit, change |
e2cbcd91 L |
3407 | leaq foo@tlsgd(%rip), %rdi |
3408 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3409 | or | |
3410 | leaq foo@tlsgd(%rip), %rdi | |
3411 | .byte 0x66; rex64 | |
3412 | call *__tls_get_addr@GOTPCREL(%rip) | |
3413 | which may be converted to | |
3414 | addr32 call __tls_get_addr | |
52bc799a | 3415 | into: |
e2cbcd91 L |
3416 | movl %fs:0, %eax |
3417 | leaq foo@tpoff(%rax), %rax | |
5c98a14e | 3418 | For largepic, change: |
e2cbcd91 L |
3419 | leaq foo@tlsgd(%rip), %rdi |
3420 | movabsq $__tls_get_addr@pltoff, %rax | |
3421 | addq %r15, %rax | |
3422 | call *%rax | |
5c98a14e | 3423 | into: |
e2cbcd91 L |
3424 | movq %fs:0, %rax |
3425 | leaq foo@tpoff(%rax), %rax | |
3426 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 3427 | int largepic = 0; |
e2cbcd91 | 3428 | if (ABI_64_P (output_bfd)) |
5c98a14e | 3429 | { |
e2cbcd91 L |
3430 | if (contents[roff + 5] == 0xb8) |
3431 | { | |
418d4036 L |
3432 | if (roff < 3 |
3433 | || (roff - 3 + 22) > input_section->size) | |
3434 | { | |
dc1e8a47 | 3435 | corrupt_input: |
418d4036 L |
3436 | info->callbacks->einfo |
3437 | (_("%F%P: corrupt input: %pB\n"), | |
3438 | input_bfd); | |
0a1b45a2 | 3439 | return false; |
418d4036 | 3440 | } |
e2cbcd91 L |
3441 | memcpy (contents + roff - 3, |
3442 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
3443 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
3444 | largepic = 1; | |
3445 | } | |
3446 | else | |
418d4036 L |
3447 | { |
3448 | if (roff < 4 | |
3449 | || (roff - 4 + 16) > input_section->size) | |
3450 | goto corrupt_input; | |
3451 | memcpy (contents + roff - 4, | |
3452 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3453 | 16); | |
3454 | } | |
5c98a14e | 3455 | } |
52bc799a | 3456 | else |
418d4036 L |
3457 | { |
3458 | if (roff < 3 | |
3459 | || (roff - 3 + 15) > input_section->size) | |
3460 | goto corrupt_input; | |
3461 | memcpy (contents + roff - 3, | |
3462 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3463 | 15); | |
3464 | } | |
eb4ff4d6 | 3465 | bfd_put_32 (output_bfd, |
351f65ca | 3466 | elf_x86_64_tpoff (info, relocation), |
5c98a14e | 3467 | contents + roff + 8 + largepic); |
e2cbcd91 L |
3468 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, |
3469 | R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */ | |
bffbf940 | 3470 | rel++; |
60f2e42e | 3471 | wrel++; |
bffbf940 JJ |
3472 | continue; |
3473 | } | |
419414ea | 3474 | else if (r_type == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
3475 | { |
3476 | /* GDesc -> LE transition. | |
3477 | It's originally something like: | |
14470f07 L |
3478 | leaq x@tlsdesc(%rip), %rax <--- LP64 mode. |
3479 | rex leal x@tlsdesc(%rip), %eax <--- X32 mode. | |
67a4f2b7 AO |
3480 | |
3481 | Change it to: | |
14470f07 L |
3482 | movq $x@tpoff, %rax <--- LP64 mode. |
3483 | rex movl $x@tpoff, %eax <--- X32 mode. | |
3484 | */ | |
67a4f2b7 | 3485 | |
c9736ba0 | 3486 | unsigned int val, type; |
67a4f2b7 | 3487 | |
418d4036 L |
3488 | if (roff < 3) |
3489 | goto corrupt_input; | |
67a4f2b7 | 3490 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 3491 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
14470f07 L |
3492 | bfd_put_8 (output_bfd, |
3493 | (type & 0x48) | ((type >> 2) & 1), | |
67a4f2b7 AO |
3494 | contents + roff - 3); |
3495 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
3496 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3497 | contents + roff - 1); | |
eb4ff4d6 | 3498 | bfd_put_32 (output_bfd, |
351f65ca | 3499 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
3500 | contents + roff); |
3501 | continue; | |
3502 | } | |
419414ea | 3503 | else if (r_type == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
3504 | { |
3505 | /* GDesc -> LE transition. | |
3506 | It's originally: | |
14470f07 L |
3507 | call *(%rax) <--- LP64 mode. |
3508 | call *(%eax) <--- X32 mode. | |
67a4f2b7 | 3509 | Turn it into: |
14470f07 L |
3510 | xchg %ax,%ax <-- LP64 mode. |
3511 | nopl (%rax) <-- X32 mode. | |
3512 | */ | |
3513 | unsigned int prefix = 0; | |
3514 | if (!ABI_64_P (input_bfd)) | |
3515 | { | |
3516 | /* Check for call *x@tlsdesc(%eax). */ | |
3517 | if (contents[roff] == 0x67) | |
3518 | prefix = 1; | |
3519 | } | |
3520 | if (prefix) | |
3521 | { | |
3522 | bfd_put_8 (output_bfd, 0x0f, contents + roff); | |
3523 | bfd_put_8 (output_bfd, 0x1f, contents + roff + 1); | |
3524 | bfd_put_8 (output_bfd, 0x00, contents + roff + 2); | |
3525 | } | |
3526 | else | |
3527 | { | |
3528 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
3529 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
3530 | } | |
67a4f2b7 AO |
3531 | continue; |
3532 | } | |
419414ea | 3533 | else if (r_type == R_X86_64_GOTTPOFF) |
bffbf940 | 3534 | { |
bffbf940 | 3535 | /* IE->LE transition: |
cf61b747 | 3536 | For 64bit, originally it can be one of: |
bffbf940 JJ |
3537 | movq foo@gottpoff(%rip), %reg |
3538 | addq foo@gottpoff(%rip), %reg | |
3539 | We change it into: | |
3540 | movq $foo, %reg | |
3541 | leaq foo(%reg), %reg | |
cf61b747 L |
3542 | addq $foo, %reg. |
3543 | For 32bit, originally it can be one of: | |
3544 | movq foo@gottpoff(%rip), %reg | |
3545 | addl foo@gottpoff(%rip), %reg | |
3546 | We change it into: | |
3547 | movq $foo, %reg | |
3548 | leal foo(%reg), %reg | |
3549 | addl $foo, %reg. */ | |
142411ca L |
3550 | |
3551 | unsigned int val, type, reg; | |
3552 | ||
cf61b747 L |
3553 | if (roff >= 3) |
3554 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
3555 | else | |
418d4036 L |
3556 | { |
3557 | if (roff < 2) | |
3558 | goto corrupt_input; | |
3559 | val = 0; | |
3560 | } | |
142411ca L |
3561 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
3562 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 3563 | reg >>= 3; |
bffbf940 JJ |
3564 | if (type == 0x8b) |
3565 | { | |
3566 | /* movq */ | |
3567 | if (val == 0x4c) | |
418d4036 L |
3568 | { |
3569 | if (roff < 3) | |
3570 | goto corrupt_input; | |
3571 | bfd_put_8 (output_bfd, 0x49, | |
3572 | contents + roff - 3); | |
3573 | } | |
4a4c5f25 | 3574 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
418d4036 L |
3575 | { |
3576 | if (roff < 3) | |
3577 | goto corrupt_input; | |
3578 | bfd_put_8 (output_bfd, 0x41, | |
3579 | contents + roff - 3); | |
3580 | } | |
bffbf940 | 3581 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 3582 | contents + roff - 2); |
bffbf940 | 3583 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3584 | contents + roff - 1); |
bffbf940 JJ |
3585 | } |
3586 | else if (reg == 4) | |
3587 | { | |
cf61b747 L |
3588 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
3589 | is special */ | |
bffbf940 | 3590 | if (val == 0x4c) |
418d4036 L |
3591 | { |
3592 | if (roff < 3) | |
3593 | goto corrupt_input; | |
3594 | bfd_put_8 (output_bfd, 0x49, | |
3595 | contents + roff - 3); | |
3596 | } | |
4a4c5f25 | 3597 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
418d4036 L |
3598 | { |
3599 | if (roff < 3) | |
3600 | goto corrupt_input; | |
3601 | bfd_put_8 (output_bfd, 0x41, | |
3602 | contents + roff - 3); | |
3603 | } | |
bffbf940 | 3604 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 3605 | contents + roff - 2); |
bffbf940 | 3606 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3607 | contents + roff - 1); |
bffbf940 JJ |
3608 | } |
3609 | else | |
3610 | { | |
cf61b747 | 3611 | /* addq/addl -> leaq/leal */ |
bffbf940 | 3612 | if (val == 0x4c) |
418d4036 L |
3613 | { |
3614 | if (roff < 3) | |
3615 | goto corrupt_input; | |
3616 | bfd_put_8 (output_bfd, 0x4d, | |
3617 | contents + roff - 3); | |
3618 | } | |
4a4c5f25 | 3619 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
418d4036 L |
3620 | { |
3621 | if (roff < 3) | |
3622 | goto corrupt_input; | |
3623 | bfd_put_8 (output_bfd, 0x45, | |
3624 | contents + roff - 3); | |
3625 | } | |
bffbf940 | 3626 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 3627 | contents + roff - 2); |
bffbf940 | 3628 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 3629 | contents + roff - 1); |
bffbf940 | 3630 | } |
eb4ff4d6 | 3631 | bfd_put_32 (output_bfd, |
351f65ca | 3632 | elf_x86_64_tpoff (info, relocation), |
142411ca | 3633 | contents + roff); |
bffbf940 JJ |
3634 | continue; |
3635 | } | |
142411ca | 3636 | else |
0a1b45a2 | 3637 | BFD_ASSERT (false); |
bffbf940 JJ |
3638 | } |
3639 | ||
6de2ae4a | 3640 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3641 | abort (); |
3642 | ||
3643 | if (h != NULL) | |
67a4f2b7 AO |
3644 | { |
3645 | off = h->got.offset; | |
0afcef53 | 3646 | offplt = elf_x86_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 3647 | } |
bffbf940 JJ |
3648 | else |
3649 | { | |
3650 | if (local_got_offsets == NULL) | |
3651 | abort (); | |
3652 | ||
3653 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 3654 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
3655 | } |
3656 | ||
3657 | if ((off & 1) != 0) | |
3658 | off &= ~1; | |
26e41594 | 3659 | else |
bffbf940 JJ |
3660 | { |
3661 | Elf_Internal_Rela outrel; | |
bffbf940 | 3662 | int dr_type, indx; |
67a4f2b7 | 3663 | asection *sreloc; |
bffbf940 | 3664 | |
6de2ae4a | 3665 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3666 | abort (); |
3667 | ||
67a4f2b7 AO |
3668 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3669 | ||
3670 | if (GOT_TLS_GDESC_P (tls_type)) | |
3671 | { | |
351f65ca | 3672 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 3673 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
3674 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
3675 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
3676 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3677 | + offplt |
3678 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 3679 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 3680 | if (indx == 0) |
0afcef53 | 3681 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
67a4f2b7 AO |
3682 | else |
3683 | outrel.r_addend = 0; | |
351f65ca | 3684 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
3685 | } |
3686 | ||
6de2ae4a | 3687 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 3688 | |
6de2ae4a L |
3689 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3690 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 3691 | |
67a4f2b7 | 3692 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 3693 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
3694 | else if (GOT_TLS_GDESC_P (tls_type)) |
3695 | goto dr_done; | |
bffbf940 JJ |
3696 | else |
3697 | dr_type = R_X86_64_TPOFF64; | |
3698 | ||
6de2ae4a | 3699 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 3700 | outrel.r_addend = 0; |
67a4f2b7 AO |
3701 | if ((dr_type == R_X86_64_TPOFF64 |
3702 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
0afcef53 | 3703 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
351f65ca | 3704 | outrel.r_info = htab->r_info (indx, dr_type); |
bffbf940 | 3705 | |
351f65ca | 3706 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 3707 | |
67a4f2b7 | 3708 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
3709 | { |
3710 | if (indx == 0) | |
3711 | { | |
d40d037c | 3712 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 3713 | bfd_put_64 (output_bfd, |
0afcef53 | 3714 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3715 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
3716 | } |
3717 | else | |
3718 | { | |
3719 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3720 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 3721 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
3722 | R_X86_64_DTPOFF64); |
3723 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 3724 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 3725 | &outrel); |
bffbf940 JJ |
3726 | } |
3727 | } | |
3728 | ||
67a4f2b7 | 3729 | dr_done: |
bffbf940 JJ |
3730 | if (h != NULL) |
3731 | h->got.offset |= 1; | |
3732 | else | |
3733 | local_got_offsets[r_symndx] |= 1; | |
3734 | } | |
3735 | ||
67a4f2b7 AO |
3736 | if (off >= (bfd_vma) -2 |
3737 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 3738 | abort (); |
419414ea | 3739 | if (r_type_tls == r_type) |
bffbf940 | 3740 | { |
67a4f2b7 AO |
3741 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
3742 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
3743 | relocation = htab->elf.sgotplt->output_section->vma |
3744 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3745 | + offplt + htab->sgotplt_jump_table_size; |
3746 | else | |
6de2ae4a L |
3747 | relocation = htab->elf.sgot->output_section->vma |
3748 | + htab->elf.sgot->output_offset + off; | |
0a1b45a2 | 3749 | unresolved_reloc = false; |
bffbf940 | 3750 | } |
142411ca | 3751 | else |
67a4f2b7 | 3752 | { |
142411ca | 3753 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 3754 | |
419414ea | 3755 | if (r_type == R_X86_64_TLSGD) |
142411ca | 3756 | { |
52bc799a | 3757 | /* GD->IE transition. For 64bit, change |
e2cbcd91 L |
3758 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3759 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3760 | or | |
3761 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3762 | .byte 0x66; rex64 | |
3763 | call *__tls_get_addr@GOTPCREL(%rip | |
3764 | which may be converted to | |
3765 | addr32 call __tls_get_addr | |
52bc799a | 3766 | into: |
e2cbcd91 L |
3767 | movq %fs:0, %rax |
3768 | addq foo@gottpoff(%rip), %rax | |
52bc799a | 3769 | For 32bit, change |
e2cbcd91 L |
3770 | leaq foo@tlsgd(%rip), %rdi |
3771 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3772 | or | |
3773 | leaq foo@tlsgd(%rip), %rdi | |
3774 | .byte 0x66; rex64; | |
3775 | call *__tls_get_addr@GOTPCREL(%rip) | |
3776 | which may be converted to | |
3777 | addr32 call __tls_get_addr | |
52bc799a | 3778 | into: |
e2cbcd91 L |
3779 | movl %fs:0, %eax |
3780 | addq foo@gottpoff(%rip), %rax | |
5c98a14e | 3781 | For largepic, change: |
e2cbcd91 L |
3782 | leaq foo@tlsgd(%rip), %rdi |
3783 | movabsq $__tls_get_addr@pltoff, %rax | |
3784 | addq %r15, %rax | |
3785 | call *%rax | |
5c98a14e | 3786 | into: |
e2cbcd91 L |
3787 | movq %fs:0, %rax |
3788 | addq foo@gottpoff(%rax), %rax | |
3789 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 3790 | int largepic = 0; |
e2cbcd91 | 3791 | if (ABI_64_P (output_bfd)) |
5c98a14e | 3792 | { |
e2cbcd91 L |
3793 | if (contents[roff + 5] == 0xb8) |
3794 | { | |
418d4036 L |
3795 | if (roff < 3 |
3796 | || (roff - 3 + 22) > input_section->size) | |
3797 | goto corrupt_input; | |
e2cbcd91 L |
3798 | memcpy (contents + roff - 3, |
3799 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
3800 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
3801 | largepic = 1; | |
3802 | } | |
3803 | else | |
418d4036 L |
3804 | { |
3805 | if (roff < 4 | |
3806 | || (roff - 4 + 16) > input_section->size) | |
3807 | goto corrupt_input; | |
3808 | memcpy (contents + roff - 4, | |
3809 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3810 | 16); | |
3811 | } | |
5c98a14e | 3812 | } |
52bc799a | 3813 | else |
418d4036 L |
3814 | { |
3815 | if (roff < 3 | |
3816 | || (roff - 3 + 15) > input_section->size) | |
3817 | goto corrupt_input; | |
3818 | memcpy (contents + roff - 3, | |
3819 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3820 | 15); | |
3821 | } | |
142411ca | 3822 | |
6de2ae4a L |
3823 | relocation = (htab->elf.sgot->output_section->vma |
3824 | + htab->elf.sgot->output_offset + off | |
142411ca | 3825 | - roff |
5c98a14e | 3826 | - largepic |
142411ca L |
3827 | - input_section->output_section->vma |
3828 | - input_section->output_offset | |
3829 | - 12); | |
3830 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
3831 | contents + roff + 8 + largepic); |
3832 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 3833 | rel++; |
60f2e42e | 3834 | wrel++; |
142411ca L |
3835 | continue; |
3836 | } | |
419414ea | 3837 | else if (r_type == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
3838 | { |
3839 | /* GDesc -> IE transition. | |
3840 | It's originally something like: | |
14470f07 L |
3841 | leaq x@tlsdesc(%rip), %rax <--- LP64 mode. |
3842 | rex leal x@tlsdesc(%rip), %eax <--- X32 mode. | |
67a4f2b7 | 3843 | |
142411ca | 3844 | Change it to: |
14470f07 L |
3845 | # before xchg %ax,%ax in LP64 mode. |
3846 | movq x@gottpoff(%rip), %rax | |
3847 | # before nopl (%rax) in X32 mode. | |
3848 | rex movl x@gottpoff(%rip), %eax | |
3849 | */ | |
67a4f2b7 | 3850 | |
142411ca | 3851 | /* Now modify the instruction as appropriate. To |
14470f07 | 3852 | turn a lea into a mov in the form we use it, it |
142411ca L |
3853 | suffices to change the second byte from 0x8d to |
3854 | 0x8b. */ | |
418d4036 L |
3855 | if (roff < 2) |
3856 | goto corrupt_input; | |
142411ca L |
3857 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); |
3858 | ||
3859 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
3860 | htab->elf.sgot->output_section->vma |
3861 | + htab->elf.sgot->output_offset + off | |
142411ca L |
3862 | - rel->r_offset |
3863 | - input_section->output_section->vma | |
3864 | - input_section->output_offset | |
3865 | - 4, | |
3866 | contents + roff); | |
3867 | continue; | |
3868 | } | |
419414ea | 3869 | else if (r_type == R_X86_64_TLSDESC_CALL) |
142411ca L |
3870 | { |
3871 | /* GDesc -> IE transition. | |
3872 | It's originally: | |
14470f07 L |
3873 | call *(%rax) <--- LP64 mode. |
3874 | call *(%eax) <--- X32 mode. | |
142411ca L |
3875 | |
3876 | Change it to: | |
14470f07 L |
3877 | xchg %ax, %ax <-- LP64 mode. |
3878 | nopl (%rax) <-- X32 mode. | |
3879 | */ | |
142411ca | 3880 | |
14470f07 L |
3881 | unsigned int prefix = 0; |
3882 | if (!ABI_64_P (input_bfd)) | |
3883 | { | |
3884 | /* Check for call *x@tlsdesc(%eax). */ | |
3885 | if (contents[roff] == 0x67) | |
3886 | prefix = 1; | |
3887 | } | |
3888 | if (prefix) | |
3889 | { | |
3890 | bfd_put_8 (output_bfd, 0x0f, contents + roff); | |
3891 | bfd_put_8 (output_bfd, 0x1f, contents + roff + 1); | |
3892 | bfd_put_8 (output_bfd, 0x00, contents + roff + 2); | |
3893 | } | |
3894 | else | |
3895 | { | |
3896 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
3897 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
3898 | } | |
142411ca L |
3899 | continue; |
3900 | } | |
3901 | else | |
0a1b45a2 | 3902 | BFD_ASSERT (false); |
67a4f2b7 | 3903 | } |
bffbf940 JJ |
3904 | break; |
3905 | ||
3906 | case R_X86_64_TLSLD: | |
351f65ca L |
3907 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3908 | input_section, contents, | |
3909 | symtab_hdr, sym_hashes, | |
bedfd056 | 3910 | &r_type, GOT_UNKNOWN, rel, |
0a1b45a2 AM |
3911 | relend, h, r_symndx, true)) |
3912 | return false; | |
a3fadc9a | 3913 | |
142411ca L |
3914 | if (r_type != R_X86_64_TLSLD) |
3915 | { | |
bffbf940 | 3916 | /* LD->LE transition: |
e2cbcd91 L |
3917 | leaq foo@tlsld(%rip), %rdi |
3918 | call __tls_get_addr@PLT | |
3919 | For 64bit, we change it into: | |
3920 | .word 0x6666; .byte 0x66; movq %fs:0, %rax | |
3921 | For 32bit, we change it into: | |
3922 | nopl 0x0(%rax); movl %fs:0, %eax | |
3923 | Or | |
3924 | leaq foo@tlsld(%rip), %rdi; | |
3925 | call *__tls_get_addr@GOTPCREL(%rip) | |
3926 | which may be converted to | |
3927 | addr32 call __tls_get_addr | |
52bc799a | 3928 | For 64bit, we change it into: |
e2cbcd91 | 3929 | .word 0x6666; .word 0x6666; movq %fs:0, %rax |
52bc799a | 3930 | For 32bit, we change it into: |
e2cbcd91 | 3931 | nopw 0x0(%rax); movl %fs:0, %eax |
5c98a14e | 3932 | For largepic, change: |
e2cbcd91 L |
3933 | leaq foo@tlsgd(%rip), %rdi |
3934 | movabsq $__tls_get_addr@pltoff, %rax | |
3935 | addq %rbx, %rax | |
3936 | call *%rax | |
3937 | into | |
3938 | data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
3939 | movq %fs:0, %eax */ | |
142411ca L |
3940 | |
3941 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
e2cbcd91 L |
3942 | if (ABI_64_P (output_bfd)) |
3943 | { | |
418d4036 L |
3944 | if ((rel->r_offset + 5) >= input_section->size) |
3945 | goto corrupt_input; | |
e2cbcd91 | 3946 | if (contents[rel->r_offset + 5] == 0xb8) |
418d4036 L |
3947 | { |
3948 | if (rel->r_offset < 3 | |
3949 | || (rel->r_offset - 3 + 22) > input_section->size) | |
3950 | goto corrupt_input; | |
3951 | memcpy (contents + rel->r_offset - 3, | |
3952 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
3953 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
3954 | } | |
e2cbcd91 L |
3955 | else if (contents[rel->r_offset + 4] == 0xff |
3956 | || contents[rel->r_offset + 4] == 0x67) | |
418d4036 L |
3957 | { |
3958 | if (rel->r_offset < 3 | |
3959 | || (rel->r_offset - 3 + 13) > input_section->size) | |
3960 | goto corrupt_input; | |
3961 | memcpy (contents + rel->r_offset - 3, | |
3962 | "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", | |
3963 | 13); | |
3964 | ||
3965 | } | |
e2cbcd91 | 3966 | else |
418d4036 L |
3967 | { |
3968 | if (rel->r_offset < 3 | |
3969 | || (rel->r_offset - 3 + 12) > input_section->size) | |
3970 | goto corrupt_input; | |
3971 | memcpy (contents + rel->r_offset - 3, | |
3972 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
3973 | } | |
e2cbcd91 | 3974 | } |
52bc799a | 3975 | else |
e2cbcd91 | 3976 | { |
418d4036 L |
3977 | if ((rel->r_offset + 4) >= input_section->size) |
3978 | goto corrupt_input; | |
e2cbcd91 | 3979 | if (contents[rel->r_offset + 4] == 0xff) |
418d4036 L |
3980 | { |
3981 | if (rel->r_offset < 3 | |
3982 | || (rel->r_offset - 3 + 13) > input_section->size) | |
3983 | goto corrupt_input; | |
3984 | memcpy (contents + rel->r_offset - 3, | |
3985 | "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", | |
3986 | 13); | |
3987 | } | |
e2cbcd91 | 3988 | else |
418d4036 L |
3989 | { |
3990 | if (rel->r_offset < 3 | |
3991 | || (rel->r_offset - 3 + 12) > input_section->size) | |
3992 | goto corrupt_input; | |
3993 | memcpy (contents + rel->r_offset - 3, | |
3994 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
3995 | } | |
e2cbcd91 L |
3996 | } |
3997 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX | |
3998 | and R_X86_64_PLTOFF64. */ | |
bffbf940 | 3999 | rel++; |
60f2e42e | 4000 | wrel++; |
bffbf940 JJ |
4001 | continue; |
4002 | } | |
4003 | ||
6de2ae4a | 4004 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
4005 | abort (); |
4006 | ||
0afcef53 | 4007 | off = htab->tls_ld_or_ldm_got.offset; |
bffbf940 JJ |
4008 | if (off & 1) |
4009 | off &= ~1; | |
4010 | else | |
4011 | { | |
4012 | Elf_Internal_Rela outrel; | |
bffbf940 | 4013 | |
6de2ae4a | 4014 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
4015 | abort (); |
4016 | ||
6de2ae4a L |
4017 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4018 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
4019 | |
4020 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 4021 | htab->elf.sgot->contents + off); |
bffbf940 | 4022 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 4023 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 4024 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 4025 | outrel.r_addend = 0; |
351f65ca | 4026 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 4027 | &outrel); |
0afcef53 | 4028 | htab->tls_ld_or_ldm_got.offset |= 1; |
bffbf940 | 4029 | } |
6de2ae4a L |
4030 | relocation = htab->elf.sgot->output_section->vma |
4031 | + htab->elf.sgot->output_offset + off; | |
0a1b45a2 | 4032 | unresolved_reloc = false; |
bffbf940 JJ |
4033 | break; |
4034 | ||
4035 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
4036 | if (!bfd_link_executable (info) |
4037 | || (input_section->flags & SEC_CODE) == 0) | |
0afcef53 | 4038 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
bffbf940 | 4039 | else |
351f65ca | 4040 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
4041 | break; |
4042 | ||
4043 | case R_X86_64_TPOFF32: | |
6769d501 | 4044 | case R_X86_64_TPOFF64: |
0e1862bb | 4045 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 4046 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
4047 | break; |
4048 | ||
a69ed7f7 L |
4049 | case R_X86_64_DTPOFF64: |
4050 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
0afcef53 | 4051 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
a69ed7f7 L |
4052 | break; |
4053 | ||
70256ad8 AJ |
4054 | default: |
4055 | break; | |
4056 | } | |
8d88c4ca | 4057 | |
239e1f3a AM |
4058 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
4059 | because such sections are not SEC_ALLOC and thus ld.so will | |
4060 | not process them. */ | |
c434dee6 | 4061 | if (unresolved_reloc |
239e1f3a | 4062 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
4063 | && h->def_dynamic) |
4064 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
4065 | rel->r_offset) != (bfd_vma) -1) | |
a040981f | 4066 | { |
7073b5b9 L |
4067 | switch (r_type) |
4068 | { | |
4069 | case R_X86_64_32S: | |
a5b4ee94 L |
4070 | sec = h->root.u.def.section; |
4071 | if ((info->nocopyreloc | |
4072 | || (eh->def_protected | |
4073 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
4074 | && !(h->root.u.def.section->flags & SEC_CODE)) |
4075 | return elf_x86_64_need_pic (info, input_bfd, input_section, | |
4076 | h, NULL, NULL, howto); | |
4077 | /* Fall through. */ | |
4078 | ||
4079 | default: | |
4080 | _bfd_error_handler | |
4081 | /* xgettext:c-format */ | |
2dcf00ce AM |
4082 | (_("%pB(%pA+%#" PRIx64 "): " |
4083 | "unresolvable %s relocation against symbol `%s'"), | |
7073b5b9 L |
4084 | input_bfd, |
4085 | input_section, | |
2dcf00ce | 4086 | (uint64_t) rel->r_offset, |
7073b5b9 L |
4087 | howto->name, |
4088 | h->root.root.string); | |
0a1b45a2 | 4089 | return false; |
7073b5b9 | 4090 | } |
a040981f | 4091 | } |
c434dee6 | 4092 | |
dc1e8a47 | 4093 | do_relocation: |
8d88c4ca | 4094 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
4095 | contents, rel->r_offset, |
4096 | relocation, rel->r_addend); | |
8d88c4ca | 4097 | |
dc1e8a47 | 4098 | check_relocation_error: |
8d88c4ca | 4099 | if (r != bfd_reloc_ok) |
8da6118f | 4100 | { |
c434dee6 AJ |
4101 | const char *name; |
4102 | ||
4103 | if (h != NULL) | |
4104 | name = h->root.root.string; | |
4105 | else | |
8da6118f | 4106 | { |
c434dee6 AJ |
4107 | name = bfd_elf_string_from_elf_section (input_bfd, |
4108 | symtab_hdr->sh_link, | |
4109 | sym->st_name); | |
4110 | if (name == NULL) | |
0a1b45a2 | 4111 | return false; |
c434dee6 | 4112 | if (*name == '\0') |
fd361982 | 4113 | name = bfd_section_name (sec); |
c434dee6 AJ |
4114 | } |
4115 | ||
4116 | if (r == bfd_reloc_overflow) | |
8b43e456 | 4117 | { |
78984959 | 4118 | if (converted_reloc) |
8b43e456 L |
4119 | { |
4120 | info->callbacks->einfo | |
1a2f1b54 L |
4121 | ("%X%H:", input_bfd, input_section, rel->r_offset); |
4122 | info->callbacks->einfo | |
4123 | (_(" failed to convert GOTPCREL relocation against " | |
4124 | "'%s'; relink with --no-relax\n"), | |
4125 | name); | |
0a1b45a2 | 4126 | status = false; |
1a2f1b54 | 4127 | continue; |
8b43e456 L |
4128 | } |
4129 | (*info->callbacks->reloc_overflow) | |
4130 | (info, (h ? &h->root : NULL), name, howto->name, | |
4131 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
4132 | } | |
c434dee6 AJ |
4133 | else |
4134 | { | |
4eca0228 | 4135 | _bfd_error_handler |
695344c0 | 4136 | /* xgettext:c-format */ |
2dcf00ce | 4137 | (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"), |
d003868e | 4138 | input_bfd, input_section, |
2dcf00ce | 4139 | (uint64_t) rel->r_offset, name, (int) r); |
0a1b45a2 | 4140 | return false; |
8da6118f KH |
4141 | } |
4142 | } | |
60f2e42e L |
4143 | |
4144 | if (wrel != rel) | |
4145 | *wrel = *rel; | |
4146 | } | |
4147 | ||
4148 | if (wrel != rel) | |
4149 | { | |
4150 | Elf_Internal_Shdr *rel_hdr; | |
4151 | size_t deleted = rel - wrel; | |
4152 | ||
4153 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
4154 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
4155 | if (rel_hdr->sh_size == 0) | |
4156 | { | |
4157 | /* It is too late to remove an empty reloc section. Leave | |
4158 | one NONE reloc. | |
4159 | ??? What is wrong with an empty section??? */ | |
4160 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
4161 | deleted -= 1; | |
4162 | } | |
4163 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
4164 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
4165 | input_section->reloc_count -= deleted; | |
8d88c4ca | 4166 | } |
70256ad8 | 4167 | |
1a2f1b54 | 4168 | return status; |
70256ad8 AJ |
4169 | } |
4170 | ||
4171 | /* Finish up dynamic symbol handling. We set the contents of various | |
4172 | dynamic sections here. */ | |
4173 | ||
0a1b45a2 | 4174 | static bool |
351f65ca L |
4175 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
4176 | struct bfd_link_info *info, | |
4177 | struct elf_link_hash_entry *h, | |
aec6b87e | 4178 | Elf_Internal_Sym *sym) |
70256ad8 | 4179 | { |
0afcef53 | 4180 | struct elf_x86_link_hash_table *htab; |
0a1b45a2 | 4181 | bool use_plt_second; |
0afcef53 | 4182 | struct elf_x86_link_hash_entry *eh; |
0a1b45a2 | 4183 | bool local_undefweak; |
70256ad8 | 4184 | |
0afcef53 | 4185 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 | 4186 | if (htab == NULL) |
0a1b45a2 | 4187 | return false; |
70256ad8 | 4188 | |
f2c29a16 L |
4189 | /* Use the second PLT section only if there is .plt section. */ |
4190 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
0ff2b86e | 4191 | |
0afcef53 | 4192 | eh = (struct elf_x86_link_hash_entry *) h; |
9e9821dd L |
4193 | if (eh->no_finish_dynamic_symbol) |
4194 | abort (); | |
dd7e64d4 | 4195 | |
aec6b87e L |
4196 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
4197 | resolved undefined weak symbols in executable so that their | |
4198 | references have value 0 at run-time. */ | |
c5bce5c6 | 4199 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); |
aec6b87e | 4200 | |
70256ad8 AJ |
4201 | if (h->plt.offset != (bfd_vma) -1) |
4202 | { | |
70256ad8 | 4203 | bfd_vma plt_index; |
38b12349 | 4204 | bfd_vma got_offset, plt_offset; |
70256ad8 | 4205 | Elf_Internal_Rela rela; |
947216bf | 4206 | bfd_byte *loc; |
0ff2b86e | 4207 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 4208 | const struct elf_backend_data *bed; |
5974eba6 | 4209 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
4210 | |
4211 | /* When building a static executable, use .iplt, .igot.plt and | |
4212 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 4213 | if (htab->elf.splt != NULL) |
cbe950e9 | 4214 | { |
6de2ae4a L |
4215 | plt = htab->elf.splt; |
4216 | gotplt = htab->elf.sgotplt; | |
4217 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
4218 | } |
4219 | else | |
4220 | { | |
6de2ae4a L |
4221 | plt = htab->elf.iplt; |
4222 | gotplt = htab->elf.igotplt; | |
4223 | relplt = htab->elf.irelplt; | |
cbe950e9 | 4224 | } |
70256ad8 | 4225 | |
f3180fa9 | 4226 | VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak) |
70256ad8 AJ |
4227 | |
4228 | /* Get the index in the procedure linkage table which | |
4229 | corresponds to this symbol. This is the index of this symbol | |
4230 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 4231 | first entry in the procedure linkage table is reserved. |
6bbec505 | 4232 | |
cbe950e9 | 4233 | Get the offset into the .got table of the entry that |
407443a3 | 4234 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
4235 | bytes. The first three are reserved for the dynamic linker. |
4236 | ||
4237 | For static executables, we don't reserve anything. */ | |
4238 | ||
6de2ae4a | 4239 | if (plt == htab->elf.splt) |
cbe950e9 | 4240 | { |
765e526c L |
4241 | got_offset = (h->plt.offset / htab->plt.plt_entry_size |
4242 | - htab->plt.has_plt0); | |
e1f98742 | 4243 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
4244 | } |
4245 | else | |
4246 | { | |
765e526c | 4247 | got_offset = h->plt.offset / htab->plt.plt_entry_size; |
e1f98742 | 4248 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 4249 | } |
70256ad8 | 4250 | |
38b12349 | 4251 | /* Fill in the entry in the procedure linkage table. */ |
765e526c L |
4252 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, |
4253 | htab->plt.plt_entry_size); | |
f2c29a16 | 4254 | if (use_plt_second) |
0ff2b86e | 4255 | { |
f2c29a16 | 4256 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
765e526c L |
4257 | htab->non_lazy_plt->plt_entry, |
4258 | htab->non_lazy_plt->plt_entry_size); | |
0ff2b86e | 4259 | |
f2c29a16 L |
4260 | resolved_plt = htab->plt_second; |
4261 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
4262 | } |
4263 | else | |
4264 | { | |
0ff2b86e L |
4265 | resolved_plt = plt; |
4266 | plt_offset = h->plt.offset; | |
4267 | } | |
eed180f8 RM |
4268 | |
4269 | /* Insert the relocation positions of the plt section. */ | |
4270 | ||
4271 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
4272 | subtracting the size of that instruction. */ | |
ab7fede8 L |
4273 | plt_got_pcrel_offset = (gotplt->output_section->vma |
4274 | + gotplt->output_offset | |
4275 | + got_offset | |
4276 | - resolved_plt->output_section->vma | |
4277 | - resolved_plt->output_offset | |
4278 | - plt_offset | |
765e526c | 4279 | - htab->plt.plt_got_insn_size); |
ab7fede8 L |
4280 | |
4281 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 4282 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
695344c0 | 4283 | /* xgettext:c-format */ |
871b3ab2 | 4284 | info->callbacks->einfo (_("%F%pB: PC-relative offset overflow in PLT entry for `%s'\n"), |
ab7fede8 L |
4285 | output_bfd, h->root.root.string); |
4286 | ||
4287 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
38b12349 | 4288 | (resolved_plt->contents + plt_offset |
765e526c | 4289 | + htab->plt.plt_got_offset)); |
cbe950e9 | 4290 | |
653165cc | 4291 | /* Fill in the entry in the global offset table, initially this |
aec6b87e L |
4292 | points to the second part of the PLT entry. Leave the entry |
4293 | as zero for undefined weak symbol in PIE. No PLT relocation | |
4294 | against undefined weak symbol in PIE. */ | |
4295 | if (!local_undefweak) | |
cbe950e9 | 4296 | { |
765e526c | 4297 | if (htab->plt.has_plt0) |
38b12349 L |
4298 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4299 | + plt->output_offset | |
4300 | + h->plt.offset | |
765e526c | 4301 | + htab->lazy_plt->plt_lazy_offset), |
38b12349 | 4302 | gotplt->contents + got_offset); |
aec6b87e L |
4303 | |
4304 | /* Fill in the entry in the .rela.plt section. */ | |
4305 | rela.r_offset = (gotplt->output_section->vma | |
4306 | + gotplt->output_offset | |
4307 | + got_offset); | |
cf1070f1 | 4308 | if (PLT_LOCAL_IFUNC_P (info, h)) |
aec6b87e | 4309 | { |
871b3ab2 | 4310 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
4311 | h->root.root.string, |
4312 | h->root.u.def.section->owner); | |
4313 | ||
aec6b87e L |
4314 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
4315 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
4316 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); | |
4317 | rela.r_addend = (h->root.u.def.value | |
4318 | + h->root.u.def.section->output_section->vma | |
4319 | + h->root.u.def.section->output_offset); | |
68b00778 L |
4320 | |
4321 | if (htab->params->report_relative_reloc) | |
4322 | _bfd_x86_elf_link_report_relative_reloc | |
4323 | (info, relplt, h, sym, "R_X86_64_IRELATIVE", &rela); | |
4324 | ||
aec6b87e L |
4325 | /* R_X86_64_IRELATIVE comes last. */ |
4326 | plt_index = htab->next_irelative_index--; | |
4327 | } | |
4328 | else | |
4329 | { | |
4330 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); | |
4331 | rela.r_addend = 0; | |
4332 | plt_index = htab->next_jump_slot_index++; | |
4333 | } | |
e1f98742 | 4334 | |
38b12349 L |
4335 | /* Don't fill the second and third slots in PLT entry for |
4336 | static executables nor without PLT0. */ | |
765e526c | 4337 | if (plt == htab->elf.splt && htab->plt.has_plt0) |
aec6b87e | 4338 | { |
38b12349 | 4339 | bfd_vma plt0_offset |
765e526c | 4340 | = h->plt.offset + htab->lazy_plt->plt_plt_insn_end; |
aec6b87e L |
4341 | |
4342 | /* Put relocation index. */ | |
4343 | bfd_put_32 (output_bfd, plt_index, | |
4344 | (plt->contents + h->plt.offset | |
765e526c | 4345 | + htab->lazy_plt->plt_reloc_offset)); |
aec6b87e L |
4346 | |
4347 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
4348 | check relocation index for overflow since branch displacement | |
4349 | will overflow first. */ | |
4350 | if (plt0_offset > 0x80000000) | |
695344c0 | 4351 | /* xgettext:c-format */ |
871b3ab2 | 4352 | info->callbacks->einfo (_("%F%pB: branch displacement overflow in PLT entry for `%s'\n"), |
aec6b87e L |
4353 | output_bfd, h->root.root.string); |
4354 | bfd_put_32 (output_bfd, - plt0_offset, | |
38b12349 | 4355 | (plt->contents + h->plt.offset |
765e526c | 4356 | + htab->lazy_plt->plt_plt_offset)); |
aec6b87e | 4357 | } |
351f65ca | 4358 | |
aec6b87e L |
4359 | bed = get_elf_backend_data (output_bfd); |
4360 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
4361 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
4362 | } | |
dd7e64d4 L |
4363 | } |
4364 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
4365 | { | |
38b12349 | 4366 | bfd_vma got_offset, plt_offset; |
dd7e64d4 | 4367 | asection *plt, *got; |
0a1b45a2 | 4368 | bool got_after_plt; |
dd7e64d4 | 4369 | int32_t got_pcrel_offset; |
dd7e64d4 L |
4370 | |
4371 | /* Set the entry in the GOT procedure linkage table. */ | |
4372 | plt = htab->plt_got; | |
4373 | got = htab->elf.sgot; | |
4374 | got_offset = h->got.offset; | |
4375 | ||
4376 | if (got_offset == (bfd_vma) -1 | |
e492d2f8 | 4377 | || (h->type == STT_GNU_IFUNC && h->def_regular) |
dd7e64d4 L |
4378 | || plt == NULL |
4379 | || got == NULL) | |
4380 | abort (); | |
70256ad8 | 4381 | |
38b12349 | 4382 | /* Use the non-lazy PLT entry template for the GOT PLT since they |
dd7e64d4 | 4383 | are the identical. */ |
dd7e64d4 L |
4384 | /* Fill in the entry in the GOT procedure linkage table. */ |
4385 | plt_offset = eh->plt_got.offset; | |
4386 | memcpy (plt->contents + plt_offset, | |
765e526c L |
4387 | htab->non_lazy_plt->plt_entry, |
4388 | htab->non_lazy_plt->plt_entry_size); | |
dd7e64d4 L |
4389 | |
4390 | /* Put offset the PC-relative instruction referring to the GOT | |
4391 | entry, subtracting the size of that instruction. */ | |
4392 | got_pcrel_offset = (got->output_section->vma | |
4393 | + got->output_offset | |
4394 | + got_offset | |
4395 | - plt->output_section->vma | |
4396 | - plt->output_offset | |
4397 | - plt_offset | |
765e526c | 4398 | - htab->non_lazy_plt->plt_got_insn_size); |
dd7e64d4 L |
4399 | |
4400 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
4401 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
4402 | if ((got_after_plt && got_pcrel_offset < 0) | |
4403 | || (!got_after_plt && got_pcrel_offset > 0)) | |
695344c0 | 4404 | /* xgettext:c-format */ |
871b3ab2 | 4405 | info->callbacks->einfo (_("%F%pB: PC-relative offset overflow in GOT PLT entry for `%s'\n"), |
dd7e64d4 L |
4406 | output_bfd, h->root.root.string); |
4407 | ||
4408 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
38b12349 | 4409 | (plt->contents + plt_offset |
765e526c | 4410 | + htab->non_lazy_plt->plt_got_offset)); |
dd7e64d4 L |
4411 | } |
4412 | ||
aec6b87e L |
4413 | if (!local_undefweak |
4414 | && !h->def_regular | |
dd7e64d4 L |
4415 | && (h->plt.offset != (bfd_vma) -1 |
4416 | || eh->plt_got.offset != (bfd_vma) -1)) | |
4417 | { | |
4418 | /* Mark the symbol as undefined, rather than as defined in | |
4419 | the .plt section. Leave the value if there were any | |
4420 | relocations where pointer equality matters (this is a clue | |
4421 | for the dynamic linker, to make function pointer | |
4422 | comparisons work between an application and shared | |
4423 | library), otherwise set it to zero. If a function is only | |
4424 | called from a binary, there is no need to slow down | |
4425 | shared libraries because of that. */ | |
4426 | sym->st_shndx = SHN_UNDEF; | |
4427 | if (!h->pointer_equality_needed) | |
4428 | sym->st_value = 0; | |
70256ad8 AJ |
4429 | } |
4430 | ||
4ec09950 L |
4431 | _bfd_x86_elf_link_fixup_ifunc_symbol (info, htab, h, sym); |
4432 | ||
aec6b87e L |
4433 | /* Don't generate dynamic GOT relocation against undefined weak |
4434 | symbol in executable. */ | |
bffbf940 | 4435 | if (h->got.offset != (bfd_vma) -1 |
0afcef53 L |
4436 | && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h)->tls_type) |
4437 | && elf_x86_hash_entry (h)->tls_type != GOT_TLS_IE | |
aec6b87e | 4438 | && !local_undefweak) |
053579d7 | 4439 | { |
053579d7 | 4440 | Elf_Internal_Rela rela; |
233cc9c1 | 4441 | asection *relgot = htab->elf.srelgot; |
68b00778 | 4442 | const char *relative_reloc_name = NULL; |
053579d7 AJ |
4443 | |
4444 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 4445 | up. */ |
6de2ae4a | 4446 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 4447 | abort (); |
053579d7 | 4448 | |
6de2ae4a L |
4449 | rela.r_offset = (htab->elf.sgot->output_section->vma |
4450 | + htab->elf.sgot->output_offset | |
dc810e39 | 4451 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
4452 | |
4453 | /* If this is a static link, or it is a -Bsymbolic link and the | |
4454 | symbol is defined locally or was forced to be local because | |
4455 | of a version file, we just want to emit a RELATIVE reloc. | |
4456 | The entry in the global offset table will already have been | |
4457 | initialized in the relocate_section function. */ | |
710ab287 | 4458 | if (h->def_regular |
0018b0a3 L |
4459 | && h->type == STT_GNU_IFUNC) |
4460 | { | |
233cc9c1 L |
4461 | if (h->plt.offset == (bfd_vma) -1) |
4462 | { | |
4463 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
4464 | if (htab->elf.splt == NULL) | |
4465 | { | |
4466 | /* use .rel[a].iplt section to store .got relocations | |
4467 | in static executable. */ | |
4468 | relgot = htab->elf.irelplt; | |
4469 | } | |
6999821f | 4470 | if (SYMBOL_REFERENCES_LOCAL_P (info, h)) |
233cc9c1 | 4471 | { |
871b3ab2 | 4472 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
4473 | h->root.root.string, |
4474 | h->root.u.def.section->owner); | |
4475 | ||
233cc9c1 L |
4476 | rela.r_info = htab->r_info (0, |
4477 | R_X86_64_IRELATIVE); | |
4478 | rela.r_addend = (h->root.u.def.value | |
4479 | + h->root.u.def.section->output_section->vma | |
4480 | + h->root.u.def.section->output_offset); | |
68b00778 | 4481 | relative_reloc_name = "R_X86_64_IRELATIVE"; |
233cc9c1 L |
4482 | } |
4483 | else | |
4484 | goto do_glob_dat; | |
4485 | } | |
4486 | else if (bfd_link_pic (info)) | |
710ab287 L |
4487 | { |
4488 | /* Generate R_X86_64_GLOB_DAT. */ | |
4489 | goto do_glob_dat; | |
4490 | } | |
4491 | else | |
4492 | { | |
90d60710 | 4493 | asection *plt; |
aab82f4c | 4494 | bfd_vma plt_offset; |
90d60710 | 4495 | |
710ab287 L |
4496 | if (!h->pointer_equality_needed) |
4497 | abort (); | |
4498 | ||
4499 | /* For non-shared object, we can't use .got.plt, which | |
4500 | contains the real function addres if we need pointer | |
4501 | equality. We load the GOT entry with the PLT entry. */ | |
f2c29a16 | 4502 | if (htab->plt_second != NULL) |
aab82f4c | 4503 | { |
f2c29a16 L |
4504 | plt = htab->plt_second; |
4505 | plt_offset = eh->plt_second.offset; | |
aab82f4c L |
4506 | } |
4507 | else | |
4508 | { | |
4509 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
4510 | plt_offset = h->plt.offset; | |
4511 | } | |
710ab287 L |
4512 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4513 | + plt->output_offset | |
aab82f4c | 4514 | + plt_offset), |
6de2ae4a | 4515 | htab->elf.sgot->contents + h->got.offset); |
0a1b45a2 | 4516 | return true; |
710ab287 | 4517 | } |
0018b0a3 | 4518 | } |
0e1862bb | 4519 | else if (bfd_link_pic (info) |
6999821f | 4520 | && SYMBOL_REFERENCES_LOCAL_P (info, h)) |
053579d7 | 4521 | { |
83924b38 | 4522 | if (!SYMBOL_DEFINED_NON_SHARED_P (h)) |
0a1b45a2 | 4523 | return false; |
cc78d0af | 4524 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 4525 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
4526 | rela.r_addend = (h->root.u.def.value |
4527 | + h->root.u.def.section->output_section->vma | |
4528 | + h->root.u.def.section->output_offset); | |
68b00778 | 4529 | relative_reloc_name = "R_X86_64_RELATIVE"; |
053579d7 AJ |
4530 | } |
4531 | else | |
4532 | { | |
4533 | BFD_ASSERT((h->got.offset & 1) == 0); | |
dc1e8a47 | 4534 | do_glob_dat: |
c434dee6 | 4535 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4536 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 4537 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
4538 | rela.r_addend = 0; |
4539 | } | |
4540 | ||
68b00778 L |
4541 | if (relative_reloc_name != NULL |
4542 | && htab->params->report_relative_reloc) | |
4543 | _bfd_x86_elf_link_report_relative_reloc | |
4544 | (info, relgot, h, sym, relative_reloc_name, &rela); | |
4545 | ||
233cc9c1 | 4546 | elf_append_rela (output_bfd, relgot, &rela); |
053579d7 AJ |
4547 | } |
4548 | ||
f5385ebf | 4549 | if (h->needs_copy) |
70256ad8 | 4550 | { |
70256ad8 | 4551 | Elf_Internal_Rela rela; |
5474d94f | 4552 | asection *s; |
70256ad8 AJ |
4553 | |
4554 | /* This symbol needs a copy reloc. Set it up. */ | |
ff38b4cc | 4555 | VERIFY_COPY_RELOC (h, htab) |
70256ad8 AJ |
4556 | |
4557 | rela.r_offset = (h->root.u.def.value | |
4558 | + h->root.u.def.section->output_section->vma | |
4559 | + h->root.u.def.section->output_offset); | |
351f65ca | 4560 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 4561 | rela.r_addend = 0; |
afbf7e8e | 4562 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
4563 | s = htab->elf.sreldynrelro; |
4564 | else | |
4565 | s = htab->elf.srelbss; | |
4566 | elf_append_rela (output_bfd, s, &rela); | |
70256ad8 AJ |
4567 | } |
4568 | ||
0a1b45a2 | 4569 | return true; |
70256ad8 AJ |
4570 | } |
4571 | ||
c25bc9fc L |
4572 | /* Finish up local dynamic symbol handling. We set the contents of |
4573 | various dynamic sections here. */ | |
4574 | ||
1201fda6 | 4575 | static int |
351f65ca | 4576 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
4577 | { |
4578 | struct elf_link_hash_entry *h | |
4579 | = (struct elf_link_hash_entry *) *slot; | |
4580 | struct bfd_link_info *info | |
eed180f8 | 4581 | = (struct bfd_link_info *) inf; |
c25bc9fc | 4582 | |
351f65ca | 4583 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
5f0f0847 | 4584 | info, h, NULL); |
c25bc9fc L |
4585 | } |
4586 | ||
aec6b87e L |
4587 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
4588 | here since undefined weak symbol may not be dynamic and may not be | |
4589 | called for elf_x86_64_finish_dynamic_symbol. */ | |
4590 | ||
0a1b45a2 | 4591 | static bool |
aec6b87e L |
4592 | elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, |
4593 | void *inf) | |
4594 | { | |
4595 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
4596 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
4597 | ||
4598 | if (h->root.type != bfd_link_hash_undefweak | |
4599 | || h->dynindx != -1) | |
0a1b45a2 | 4600 | return true; |
aec6b87e L |
4601 | |
4602 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, | |
5f0f0847 | 4603 | info, h, NULL); |
aec6b87e L |
4604 | } |
4605 | ||
c434dee6 AJ |
4606 | /* Used to decide how to sort relocs in an optimal manner for the |
4607 | dynamic linker, before writing them out. */ | |
4608 | ||
4609 | static enum elf_reloc_type_class | |
cae1fbbb | 4610 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
4611 | const asection *rel_sec ATTRIBUTE_UNUSED, |
4612 | const Elf_Internal_Rela *rela) | |
c434dee6 | 4613 | { |
cae1fbbb L |
4614 | bfd *abfd = info->output_bfd; |
4615 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
0afcef53 L |
4616 | struct elf_x86_link_hash_table *htab |
4617 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
cae1fbbb | 4618 | |
d9e3b590 L |
4619 | if (htab->elf.dynsym != NULL |
4620 | && htab->elf.dynsym->contents != NULL) | |
4621 | { | |
4622 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
07d6d2b8 | 4623 | dynamic symbols. */ |
d9e3b590 | 4624 | unsigned long r_symndx = htab->r_sym (rela->r_info); |
897463b1 L |
4625 | if (r_symndx != STN_UNDEF) |
4626 | { | |
4627 | Elf_Internal_Sym sym; | |
4628 | if (!bed->s->swap_symbol_in (abfd, | |
4629 | (htab->elf.dynsym->contents | |
4630 | + r_symndx * bed->s->sizeof_sym), | |
4631 | 0, &sym)) | |
4632 | abort (); | |
d9e3b590 | 4633 | |
897463b1 L |
4634 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
4635 | return reloc_class_ifunc; | |
4636 | } | |
d9e3b590 | 4637 | } |
cae1fbbb | 4638 | |
351f65ca | 4639 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 | 4640 | { |
c428ce9d L |
4641 | case R_X86_64_IRELATIVE: |
4642 | return reloc_class_ifunc; | |
c434dee6 | 4643 | case R_X86_64_RELATIVE: |
1da80baa | 4644 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
4645 | return reloc_class_relative; |
4646 | case R_X86_64_JUMP_SLOT: | |
4647 | return reloc_class_plt; | |
4648 | case R_X86_64_COPY: | |
4649 | return reloc_class_copy; | |
4650 | default: | |
4651 | return reloc_class_normal; | |
4652 | } | |
4653 | } | |
4654 | ||
70256ad8 AJ |
4655 | /* Finish up the dynamic sections. */ |
4656 | ||
0a1b45a2 | 4657 | static bool |
351f65ca L |
4658 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
4659 | struct bfd_link_info *info) | |
70256ad8 | 4660 | { |
0afcef53 | 4661 | struct elf_x86_link_hash_table *htab; |
70256ad8 | 4662 | |
9577f60b | 4663 | htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info); |
4dfe6ac6 | 4664 | if (htab == NULL) |
0a1b45a2 | 4665 | return false; |
4dfe6ac6 | 4666 | |
9577f60b | 4667 | if (! htab->elf.dynamic_sections_created) |
0a1b45a2 | 4668 | return true; |
70256ad8 | 4669 | |
9577f60b | 4670 | if (htab->elf.splt && htab->elf.splt->size > 0) |
e41b3a13 | 4671 | { |
9577f60b L |
4672 | elf_section_data (htab->elf.splt->output_section) |
4673 | ->this_hdr.sh_entsize = htab->plt.plt_entry_size; | |
e41b3a13 | 4674 | |
9577f60b | 4675 | if (htab->plt.has_plt0) |
fff53dae | 4676 | { |
9577f60b L |
4677 | /* Fill in the special first entry in the procedure linkage |
4678 | table. */ | |
4679 | memcpy (htab->elf.splt->contents, | |
4680 | htab->lazy_plt->plt0_entry, | |
4681 | htab->lazy_plt->plt0_entry_size); | |
4682 | /* Add offset for pushq GOT+8(%rip), since the instruction | |
4683 | uses 6 bytes subtract this value. */ | |
4684 | bfd_put_32 (output_bfd, | |
4685 | (htab->elf.sgotplt->output_section->vma | |
4686 | + htab->elf.sgotplt->output_offset | |
4687 | + 8 | |
4688 | - htab->elf.splt->output_section->vma | |
4689 | - htab->elf.splt->output_offset | |
4690 | - 6), | |
4691 | (htab->elf.splt->contents | |
4692 | + htab->lazy_plt->plt0_got1_offset)); | |
4693 | /* Add offset for the PC-relative instruction accessing | |
4694 | GOT+16, subtracting the offset to the end of that | |
4695 | instruction. */ | |
4696 | bfd_put_32 (output_bfd, | |
4697 | (htab->elf.sgotplt->output_section->vma | |
4698 | + htab->elf.sgotplt->output_offset | |
4699 | + 16 | |
4700 | - htab->elf.splt->output_section->vma | |
4701 | - htab->elf.splt->output_offset | |
4702 | - htab->lazy_plt->plt0_got2_insn_end), | |
4703 | (htab->elf.splt->contents | |
4704 | + htab->lazy_plt->plt0_got2_offset)); | |
fff53dae | 4705 | } |
fff53dae | 4706 | |
9bcc30e4 | 4707 | if (htab->elf.tlsdesc_plt) |
8361ed4d | 4708 | { |
9577f60b | 4709 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
9bcc30e4 | 4710 | htab->elf.sgot->contents + htab->elf.tlsdesc_got); |
9577f60b | 4711 | |
9bcc30e4 | 4712 | memcpy (htab->elf.splt->contents + htab->elf.tlsdesc_plt, |
92e68c1d L |
4713 | htab->lazy_plt->plt_tlsdesc_entry, |
4714 | htab->lazy_plt->plt_tlsdesc_entry_size); | |
9577f60b | 4715 | |
bf54968b L |
4716 | /* Add offset for pushq GOT+8(%rip), since ENDBR64 uses 4 |
4717 | bytes and the instruction uses 6 bytes, subtract these | |
4718 | values. */ | |
9577f60b L |
4719 | bfd_put_32 (output_bfd, |
4720 | (htab->elf.sgotplt->output_section->vma | |
4721 | + htab->elf.sgotplt->output_offset | |
4722 | + 8 | |
4723 | - htab->elf.splt->output_section->vma | |
4724 | - htab->elf.splt->output_offset | |
9bcc30e4 | 4725 | - htab->elf.tlsdesc_plt |
92e68c1d | 4726 | - htab->lazy_plt->plt_tlsdesc_got1_insn_end), |
9577f60b | 4727 | (htab->elf.splt->contents |
9bcc30e4 | 4728 | + htab->elf.tlsdesc_plt |
92e68c1d | 4729 | + htab->lazy_plt->plt_tlsdesc_got1_offset)); |
bf54968b L |
4730 | /* Add offset for indirect branch via GOT+TDG, where TDG |
4731 | stands for htab->tlsdesc_got, subtracting the offset | |
4732 | to the end of that instruction. */ | |
9577f60b L |
4733 | bfd_put_32 (output_bfd, |
4734 | (htab->elf.sgot->output_section->vma | |
4735 | + htab->elf.sgot->output_offset | |
9bcc30e4 | 4736 | + htab->elf.tlsdesc_got |
9577f60b L |
4737 | - htab->elf.splt->output_section->vma |
4738 | - htab->elf.splt->output_offset | |
9bcc30e4 | 4739 | - htab->elf.tlsdesc_plt |
92e68c1d | 4740 | - htab->lazy_plt->plt_tlsdesc_got2_insn_end), |
9577f60b | 4741 | (htab->elf.splt->contents |
9bcc30e4 | 4742 | + htab->elf.tlsdesc_plt |
92e68c1d | 4743 | + htab->lazy_plt->plt_tlsdesc_got2_offset)); |
8361ed4d L |
4744 | } |
4745 | } | |
4746 | ||
aec6b87e L |
4747 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
4748 | if (bfd_link_pie (info)) | |
4749 | bfd_hash_traverse (&info->hash->table, | |
4750 | elf_x86_64_pie_finish_undefweak_symbol, | |
4751 | info); | |
4752 | ||
0a1b45a2 | 4753 | return true; |
8d88c4ca NC |
4754 | } |
4755 | ||
233cc9c1 L |
4756 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
4757 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
4758 | It has to be done before elf_link_sort_relocs is called so that | |
4759 | dynamic relocations are properly sorted. */ | |
4760 | ||
0a1b45a2 | 4761 | static bool |
233cc9c1 L |
4762 | elf_x86_64_output_arch_local_syms |
4763 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
4764 | struct bfd_link_info *info, | |
4765 | void *flaginfo ATTRIBUTE_UNUSED, | |
4766 | int (*func) (void *, const char *, | |
4767 | Elf_Internal_Sym *, | |
4768 | asection *, | |
4769 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
4770 | { | |
0afcef53 L |
4771 | struct elf_x86_link_hash_table *htab |
4772 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
233cc9c1 | 4773 | if (htab == NULL) |
0a1b45a2 | 4774 | return false; |
233cc9c1 L |
4775 | |
4776 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
4777 | htab_traverse (htab->loc_hash_table, | |
4778 | elf_x86_64_finish_local_dynamic_symbol, | |
4779 | info); | |
4780 | ||
0a1b45a2 | 4781 | return true; |
233cc9c1 L |
4782 | } |
4783 | ||
38b12349 L |
4784 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all |
4785 | dynamic relocations. */ | |
4786 | ||
4787 | static long | |
4788 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
4789 | long symcount ATTRIBUTE_UNUSED, | |
4790 | asymbol **syms ATTRIBUTE_UNUSED, | |
4791 | long dynsymcount, | |
4792 | asymbol **dynsyms, | |
4793 | asymbol **ret) | |
4794 | { | |
f493882d | 4795 | long count, i, n; |
38b12349 | 4796 | int j; |
38b12349 | 4797 | bfd_byte *plt_contents; |
f493882d | 4798 | long relsize; |
765e526c L |
4799 | const struct elf_x86_lazy_plt_layout *lazy_plt; |
4800 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
4801 | const struct elf_x86_lazy_plt_layout *lazy_bnd_plt; | |
4802 | const struct elf_x86_non_lazy_plt_layout *non_lazy_bnd_plt; | |
4803 | const struct elf_x86_lazy_plt_layout *lazy_ibt_plt; | |
4804 | const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt; | |
38b12349 | 4805 | asection *plt; |
f493882d L |
4806 | enum elf_x86_plt_type plt_type; |
4807 | struct elf_x86_plt plts[] = | |
144bed8d | 4808 | { |
38b12349 L |
4809 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
4810 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
f2c29a16 L |
4811 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, |
4812 | { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
dd9e66ee | 4813 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } |
38b12349 | 4814 | }; |
144bed8d | 4815 | |
38b12349 | 4816 | *ret = NULL; |
144bed8d | 4817 | |
38b12349 L |
4818 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
4819 | return 0; | |
144bed8d | 4820 | |
38b12349 L |
4821 | if (dynsymcount <= 0) |
4822 | return 0; | |
cca5b8b6 | 4823 | |
38b12349 L |
4824 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
4825 | if (relsize <= 0) | |
4826 | return -1; | |
4827 | ||
bbd19b19 L |
4828 | lazy_plt = &elf_x86_64_lazy_plt; |
4829 | non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
4830 | lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt; | |
4831 | non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt; | |
4832 | if (ABI_64_P (abfd)) | |
144bed8d | 4833 | { |
bbd19b19 L |
4834 | lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; |
4835 | non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
38b12349 L |
4836 | } |
4837 | else | |
4838 | { | |
bbd19b19 L |
4839 | lazy_ibt_plt = &elf_x32_lazy_ibt_plt; |
4840 | non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
38b12349 | 4841 | } |
144bed8d | 4842 | |
38b12349 L |
4843 | count = 0; |
4844 | for (j = 0; plts[j].name != NULL; j++) | |
4845 | { | |
4846 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
90efb642 | 4847 | if (plt == NULL || plt->size == 0) |
6f25f223 | 4848 | continue; |
533d0af0 | 4849 | |
38b12349 | 4850 | /* Get the PLT section contents. */ |
b5f386d5 | 4851 | if (!bfd_malloc_and_get_section (abfd, plt, &plt_contents)) |
38b12349 | 4852 | break; |
144bed8d | 4853 | |
38b12349 L |
4854 | /* Check what kind of PLT it is. */ |
4855 | plt_type = plt_unknown; | |
90efb642 L |
4856 | if (plts[j].type == plt_unknown |
4857 | && (plt->size >= (lazy_plt->plt_entry_size | |
4858 | + lazy_plt->plt_entry_size))) | |
144bed8d | 4859 | { |
38b12349 L |
4860 | /* Match lazy PLT first. Need to check the first two |
4861 | instructions. */ | |
4862 | if ((memcmp (plt_contents, lazy_plt->plt0_entry, | |
4863 | lazy_plt->plt0_got1_offset) == 0) | |
4864 | && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6, | |
4865 | 2) == 0)) | |
4866 | plt_type = plt_lazy; | |
4867 | else if (lazy_bnd_plt != NULL | |
4868 | && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry, | |
4869 | lazy_bnd_plt->plt0_got1_offset) == 0) | |
4870 | && (memcmp (plt_contents + 6, | |
4871 | lazy_bnd_plt->plt0_entry + 6, 3) == 0)) | |
ec1f73bb | 4872 | { |
f2c29a16 | 4873 | plt_type = plt_lazy | plt_second; |
ee2fdd6f L |
4874 | /* The fist entry in the lazy IBT PLT is the same as the |
4875 | lazy BND PLT. */ | |
4876 | if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size, | |
4877 | lazy_ibt_plt->plt_entry, | |
4878 | lazy_ibt_plt->plt_got_offset) == 0)) | |
4879 | lazy_plt = lazy_ibt_plt; | |
4880 | else | |
4881 | lazy_plt = lazy_bnd_plt; | |
ec1f73bb | 4882 | } |
144bed8d | 4883 | } |
fca6ae69 | 4884 | |
38b12349 | 4885 | if (non_lazy_plt != NULL |
90efb642 L |
4886 | && (plt_type == plt_unknown || plt_type == plt_non_lazy) |
4887 | && plt->size >= non_lazy_plt->plt_entry_size) | |
38b12349 L |
4888 | { |
4889 | /* Match non-lazy PLT. */ | |
4890 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
4891 | non_lazy_plt->plt_got_offset) == 0) | |
4892 | plt_type = plt_non_lazy; | |
4893 | } | |
4894 | ||
ee2fdd6f | 4895 | if (plt_type == plt_unknown || plt_type == plt_second) |
38b12349 | 4896 | { |
ee2fdd6f | 4897 | if (non_lazy_bnd_plt != NULL |
90efb642 | 4898 | && plt->size >= non_lazy_bnd_plt->plt_entry_size |
ee2fdd6f L |
4899 | && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry, |
4900 | non_lazy_bnd_plt->plt_got_offset) == 0)) | |
38b12349 | 4901 | { |
ee2fdd6f | 4902 | /* Match BND PLT. */ |
f2c29a16 | 4903 | plt_type = plt_second; |
38b12349 L |
4904 | non_lazy_plt = non_lazy_bnd_plt; |
4905 | } | |
ee2fdd6f | 4906 | else if (non_lazy_ibt_plt != NULL |
90efb642 | 4907 | && plt->size >= non_lazy_ibt_plt->plt_entry_size |
ee2fdd6f L |
4908 | && (memcmp (plt_contents, |
4909 | non_lazy_ibt_plt->plt_entry, | |
4910 | non_lazy_ibt_plt->plt_got_offset) == 0)) | |
4911 | { | |
4912 | /* Match IBT PLT. */ | |
4913 | plt_type = plt_second; | |
4914 | non_lazy_plt = non_lazy_ibt_plt; | |
4915 | } | |
38b12349 L |
4916 | } |
4917 | ||
4918 | if (plt_type == plt_unknown) | |
37c0b6ee L |
4919 | { |
4920 | free (plt_contents); | |
4921 | continue; | |
4922 | } | |
38b12349 L |
4923 | |
4924 | plts[j].sec = plt; | |
4925 | plts[j].type = plt_type; | |
4926 | ||
4927 | if ((plt_type & plt_lazy)) | |
4928 | { | |
4929 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
4930 | plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size; | |
4931 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
4932 | /* Skip PLT0 in lazy PLT. */ | |
4933 | i = 1; | |
4934 | } | |
4935 | else | |
4936 | { | |
4937 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
4938 | plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size; | |
4939 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
4940 | i = 0; | |
4941 | } | |
4942 | ||
f2c29a16 L |
4943 | /* Skip lazy PLT when the second PLT is used. */ |
4944 | if (plt_type == (plt_lazy | plt_second)) | |
38b12349 L |
4945 | plts[j].count = 0; |
4946 | else | |
4947 | { | |
4948 | n = plt->size / plts[j].plt_entry_size; | |
4949 | plts[j].count = n; | |
4950 | count += n - i; | |
4951 | } | |
4952 | ||
4953 | plts[j].contents = plt_contents; | |
144bed8d L |
4954 | } |
4955 | ||
f493882d L |
4956 | return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize, |
4957 | (bfd_vma) 0, plts, dynsyms, | |
4958 | ret); | |
0ff2b86e L |
4959 | } |
4960 | ||
d2b2c203 DJ |
4961 | /* Handle an x86-64 specific section when reading an object file. This |
4962 | is called when elfcode.h finds a section with an unknown type. */ | |
4963 | ||
0a1b45a2 | 4964 | static bool |
0c723101 L |
4965 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
4966 | const char *name, int shindex) | |
d2b2c203 DJ |
4967 | { |
4968 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
0a1b45a2 | 4969 | return false; |
d2b2c203 | 4970 | |
6dc132d9 | 4971 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
0a1b45a2 | 4972 | return false; |
d2b2c203 | 4973 | |
0a1b45a2 | 4974 | return true; |
d2b2c203 DJ |
4975 | } |
4976 | ||
3b22753a L |
4977 | /* Hook called by the linker routine which adds symbols from an object |
4978 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
4979 | of .bss. */ | |
4980 | ||
0a1b45a2 | 4981 | static bool |
351f65ca | 4982 | elf_x86_64_add_symbol_hook (bfd *abfd, |
a43942db | 4983 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
351f65ca L |
4984 | Elf_Internal_Sym *sym, |
4985 | const char **namep ATTRIBUTE_UNUSED, | |
4986 | flagword *flagsp ATTRIBUTE_UNUSED, | |
4987 | asection **secp, | |
4988 | bfd_vma *valp) | |
3b22753a L |
4989 | { |
4990 | asection *lcomm; | |
4991 | ||
4992 | switch (sym->st_shndx) | |
4993 | { | |
4994 | case SHN_X86_64_LCOMMON: | |
4995 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
4996 | if (lcomm == NULL) | |
4997 | { | |
4998 | lcomm = bfd_make_section_with_flags (abfd, | |
4999 | "LARGE_COMMON", | |
5000 | (SEC_ALLOC | |
5001 | | SEC_IS_COMMON | |
5002 | | SEC_LINKER_CREATED)); | |
5003 | if (lcomm == NULL) | |
0a1b45a2 | 5004 | return false; |
3b22753a L |
5005 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; |
5006 | } | |
5007 | *secp = lcomm; | |
5008 | *valp = sym->st_size; | |
0a1b45a2 | 5009 | return true; |
3b22753a | 5010 | } |
d8045f23 | 5011 | |
0a1b45a2 | 5012 | return true; |
3b22753a L |
5013 | } |
5014 | ||
5015 | ||
5016 | /* Given a BFD section, try to locate the corresponding ELF section | |
5017 | index. */ | |
5018 | ||
0a1b45a2 | 5019 | static bool |
351f65ca L |
5020 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
5021 | asection *sec, int *index_return) | |
3b22753a L |
5022 | { |
5023 | if (sec == &_bfd_elf_large_com_section) | |
5024 | { | |
91d6fa6a | 5025 | *index_return = SHN_X86_64_LCOMMON; |
0a1b45a2 | 5026 | return true; |
3b22753a | 5027 | } |
0a1b45a2 | 5028 | return false; |
3b22753a L |
5029 | } |
5030 | ||
5031 | /* Process a symbol. */ | |
5032 | ||
5033 | static void | |
351f65ca L |
5034 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
5035 | asymbol *asym) | |
3b22753a L |
5036 | { |
5037 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
5038 | ||
5039 | switch (elfsym->internal_elf_sym.st_shndx) | |
5040 | { | |
5041 | case SHN_X86_64_LCOMMON: | |
5042 | asym->section = &_bfd_elf_large_com_section; | |
5043 | asym->value = elfsym->internal_elf_sym.st_size; | |
5044 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
5045 | asym->flags &= ~BSF_GLOBAL; | |
5046 | break; | |
5047 | } | |
5048 | } | |
5049 | ||
0a1b45a2 | 5050 | static bool |
351f65ca | 5051 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
5052 | { |
5053 | return (sym->st_shndx == SHN_COMMON | |
5054 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
5055 | } | |
5056 | ||
5057 | static unsigned int | |
351f65ca | 5058 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
5059 | { |
5060 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
5061 | return SHN_COMMON; | |
5062 | else | |
5063 | return SHN_X86_64_LCOMMON; | |
5064 | } | |
5065 | ||
5066 | static asection * | |
351f65ca | 5067 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
5068 | { |
5069 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
5070 | return bfd_com_section_ptr; | |
5071 | else | |
5072 | return &_bfd_elf_large_com_section; | |
5073 | } | |
5074 | ||
0a1b45a2 | 5075 | static bool |
5d13b3b3 AM |
5076 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
5077 | const Elf_Internal_Sym *sym, | |
351f65ca | 5078 | asection **psec, |
0a1b45a2 AM |
5079 | bool newdef, |
5080 | bool olddef, | |
351f65ca | 5081 | bfd *oldbfd, |
5d13b3b3 | 5082 | const asection *oldsec) |
3b22753a L |
5083 | { |
5084 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
5085 | normal common symbol. We turn the large common symbol into a |
5086 | normal one. */ | |
5d13b3b3 | 5087 | if (!olddef |
3b22753a | 5088 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
5089 | && !newdef |
5090 | && bfd_is_com_section (*psec) | |
5091 | && oldsec != *psec) | |
3b22753a | 5092 | { |
00492999 | 5093 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 5094 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
5095 | { |
5096 | h->root.u.c.p->section | |
5097 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
5098 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
5099 | } | |
5100 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
5101 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
5102 | *psec = bfd_com_section_ptr; | |
3b22753a L |
5103 | } |
5104 | ||
0a1b45a2 | 5105 | return true; |
3b22753a L |
5106 | } |
5107 | ||
5108 | static int | |
351f65ca L |
5109 | elf_x86_64_additional_program_headers (bfd *abfd, |
5110 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
5111 | { |
5112 | asection *s; | |
9a2e389a | 5113 | int count = 0; |
3b22753a L |
5114 | |
5115 | /* Check to see if we need a large readonly segment. */ | |
5116 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
5117 | if (s && (s->flags & SEC_LOAD)) | |
5118 | count++; | |
5119 | ||
5120 | /* Check to see if we need a large data segment. Since .lbss sections | |
5121 | is placed right after the .bss section, there should be no need for | |
5122 | a large data segment just because of .lbss. */ | |
5123 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
5124 | if (s && (s->flags & SEC_LOAD)) | |
5125 | count++; | |
5126 | ||
5127 | return count; | |
5128 | } | |
5129 | ||
c543bf9a L |
5130 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
5131 | ||
0a1b45a2 | 5132 | static bool |
c543bf9a L |
5133 | elf_x86_64_relocs_compatible (const bfd_target *input, |
5134 | const bfd_target *output) | |
5135 | { | |
5136 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
5137 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
5138 | && _bfd_elf_relocs_compatible (input, output)); | |
5139 | } | |
5140 | ||
38b12349 L |
5141 | /* Set up x86-64 GNU properties. Return the first relocatable ELF input |
5142 | with GNU properties if found. Otherwise, return NULL. */ | |
5143 | ||
5144 | static bfd * | |
5145 | elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info) | |
5146 | { | |
1de031c8 | 5147 | struct elf_x86_init_table init_table; |
bbd19b19 L |
5148 | const struct elf_backend_data *bed; |
5149 | struct elf_x86_link_hash_table *htab; | |
ee2fdd6f | 5150 | |
78984959 L |
5151 | if ((int) R_X86_64_standard >= (int) R_X86_64_converted_reloc_bit |
5152 | || (int) R_X86_64_max <= (int) R_X86_64_converted_reloc_bit | |
5153 | || ((int) (R_X86_64_GNU_VTINHERIT | R_X86_64_converted_reloc_bit) | |
5154 | != (int) R_X86_64_GNU_VTINHERIT) | |
5155 | || ((int) (R_X86_64_GNU_VTENTRY | R_X86_64_converted_reloc_bit) | |
5156 | != (int) R_X86_64_GNU_VTENTRY)) | |
5157 | abort (); | |
5158 | ||
851b6fa1 L |
5159 | /* This is unused for x86-64. */ |
5160 | init_table.plt0_pad_byte = 0x90; | |
5161 | ||
bbd19b19 L |
5162 | bed = get_elf_backend_data (info->output_bfd); |
5163 | htab = elf_x86_hash_table (info, bed->target_id); | |
5164 | if (!htab) | |
5165 | abort (); | |
5166 | if (htab->params->bndplt) | |
73784fa5 | 5167 | { |
bbd19b19 L |
5168 | init_table.lazy_plt = &elf_x86_64_lazy_bnd_plt; |
5169 | init_table.non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt; | |
5170 | } | |
5171 | else | |
5172 | { | |
5173 | init_table.lazy_plt = &elf_x86_64_lazy_plt; | |
5174 | init_table.non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
5175 | } | |
38b12349 | 5176 | |
bbd19b19 L |
5177 | if (ABI_64_P (info->output_bfd)) |
5178 | { | |
5179 | init_table.lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; | |
5180 | init_table.non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
38b12349 L |
5181 | } |
5182 | else | |
5183 | { | |
bbd19b19 L |
5184 | init_table.lazy_ibt_plt = &elf_x32_lazy_ibt_plt; |
5185 | init_table.non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
38b12349 L |
5186 | } |
5187 | ||
7a382c1c L |
5188 | if (ABI_64_P (info->output_bfd)) |
5189 | { | |
1de031c8 L |
5190 | init_table.r_info = elf64_r_info; |
5191 | init_table.r_sym = elf64_r_sym; | |
7a382c1c L |
5192 | } |
5193 | else | |
5194 | { | |
1de031c8 L |
5195 | init_table.r_info = elf32_r_info; |
5196 | init_table.r_sym = elf32_r_sym; | |
7a382c1c L |
5197 | } |
5198 | ||
1de031c8 | 5199 | return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table); |
38b12349 L |
5200 | } |
5201 | ||
9a2e389a | 5202 | static const struct bfd_elf_special_section |
46bed679 | 5203 | elf_x86_64_special_sections[]= |
3b22753a | 5204 | { |
0112cd26 NC |
5205 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
5206 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
5207 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
07d6d2b8 | 5208 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
0112cd26 NC |
5209 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
5210 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
07d6d2b8 | 5211 | { NULL, 0, 0, 0, 0 } |
3b22753a L |
5212 | }; |
5213 | ||
6d00b590 | 5214 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
5215 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
5216 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 5217 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 5218 | #define ELF_MACHINE_CODE EM_X86_64 |
f6aec96d L |
5219 | #if DEFAULT_LD_Z_SEPARATE_CODE |
5220 | # define ELF_MAXPAGESIZE 0x1000 | |
5221 | #else | |
5222 | # define ELF_MAXPAGESIZE 0x200000 | |
5223 | #endif | |
2043964e | 5224 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 5225 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
5226 | |
5227 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 5228 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
5229 | #define elf_backend_want_got_plt 1 |
5230 | #define elf_backend_plt_readonly 1 | |
5231 | #define elf_backend_want_plt_sym 0 | |
5232 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 5233 | #define elf_backend_rela_normal 1 |
07d6d2b8 | 5234 | #define elf_backend_plt_alignment 4 |
f7483970 | 5235 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 5236 | #define elf_backend_caches_rawsize 1 |
64f52338 | 5237 | #define elf_backend_dtrel_excludes_plt 1 |
5474d94f | 5238 | #define elf_backend_want_dynrelro 1 |
70256ad8 | 5239 | |
351f65ca | 5240 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 5241 | |
351f65ca | 5242 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 5243 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 5244 | elf_x86_64_reloc_name_lookup |
70256ad8 | 5245 | |
c543bf9a | 5246 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca | 5247 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
38b12349 | 5248 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
351f65ca L |
5249 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections |
5250 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
233cc9c1 | 5251 | #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms |
351f65ca L |
5252 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus |
5253 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
5254 | #ifdef CORE_HEADER |
5255 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
5256 | #endif | |
351f65ca L |
5257 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
5258 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
74541ad4 | 5259 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 5260 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
0ff2b86e | 5261 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 5262 | |
d2b2c203 | 5263 | #define elf_backend_section_from_shdr \ |
351f65ca | 5264 | elf_x86_64_section_from_shdr |
d2b2c203 | 5265 | |
3b22753a | 5266 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 5267 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 5268 | #define elf_backend_add_symbol_hook \ |
351f65ca | 5269 | elf_x86_64_add_symbol_hook |
3b22753a | 5270 | #define elf_backend_symbol_processing \ |
351f65ca | 5271 | elf_x86_64_symbol_processing |
3b22753a | 5272 | #define elf_backend_common_section_index \ |
351f65ca | 5273 | elf_x86_64_common_section_index |
3b22753a | 5274 | #define elf_backend_common_section \ |
351f65ca | 5275 | elf_x86_64_common_section |
3b22753a | 5276 | #define elf_backend_common_definition \ |
351f65ca | 5277 | elf_x86_64_common_definition |
3b22753a | 5278 | #define elf_backend_merge_symbol \ |
351f65ca | 5279 | elf_x86_64_merge_symbol |
3b22753a | 5280 | #define elf_backend_special_sections \ |
351f65ca | 5281 | elf_x86_64_special_sections |
3b22753a | 5282 | #define elf_backend_additional_program_headers \ |
351f65ca | 5283 | elf_x86_64_additional_program_headers |
38b12349 | 5284 | #define elf_backend_setup_gnu_properties \ |
9f857535 L |
5285 | elf_x86_64_link_setup_gnu_properties |
5286 | #define elf_backend_hide_symbol \ | |
5287 | _bfd_x86_elf_hide_symbol | |
3b22753a | 5288 | |
8f56f7a2 L |
5289 | #undef elf64_bed |
5290 | #define elf64_bed elf64_x86_64_bed | |
5291 | ||
8d88c4ca | 5292 | #include "elf64-target.h" |
9d7cbccd | 5293 | |
6036f486 ES |
5294 | /* CloudABI support. */ |
5295 | ||
07d6d2b8 | 5296 | #undef TARGET_LITTLE_SYM |
6036f486 | 5297 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec |
07d6d2b8 | 5298 | #undef TARGET_LITTLE_NAME |
6036f486 ES |
5299 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" |
5300 | ||
5301 | #undef ELF_OSABI | |
5302 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
5303 | ||
07d6d2b8 | 5304 | #undef elf64_bed |
6036f486 ES |
5305 | #define elf64_bed elf64_x86_64_cloudabi_bed |
5306 | ||
5307 | #include "elf64-target.h" | |
5308 | ||
9d7cbccd NC |
5309 | /* FreeBSD support. */ |
5310 | ||
07d6d2b8 | 5311 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5312 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
07d6d2b8 | 5313 | #undef TARGET_LITTLE_NAME |
9d7cbccd NC |
5314 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" |
5315 | ||
d1036acb L |
5316 | #undef ELF_OSABI |
5317 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 5318 | |
07d6d2b8 | 5319 | #undef elf64_bed |
9d7cbccd NC |
5320 | #define elf64_bed elf64_x86_64_fbsd_bed |
5321 | ||
5322 | #include "elf64-target.h" | |
8a9036a4 | 5323 | |
a6cc6b3b RO |
5324 | /* Solaris 2 support. */ |
5325 | ||
5326 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5327 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
5328 | #undef TARGET_LITTLE_NAME |
5329 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
5330 | ||
90c14f0c L |
5331 | #undef ELF_TARGET_OS |
5332 | #define ELF_TARGET_OS is_solaris | |
3b4c3844 | 5333 | |
a6cc6b3b RO |
5334 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE |
5335 | objects won't be recognized. */ | |
5336 | #undef ELF_OSABI | |
5337 | ||
5338 | #undef elf64_bed | |
5339 | #define elf64_bed elf64_x86_64_sol2_bed | |
5340 | ||
7dc98aea RO |
5341 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
5342 | boundary. */ | |
84865015 | 5343 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
5344 | #define elf_backend_static_tls_alignment 16 |
5345 | ||
a6cc6b3b RO |
5346 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
5347 | ||
5348 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
5349 | File, p.63. */ | |
84865015 | 5350 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
5351 | #define elf_backend_want_plt_sym 1 |
5352 | ||
84865015 NC |
5353 | #undef elf_backend_strtab_flags |
5354 | #define elf_backend_strtab_flags SHF_STRINGS | |
5355 | ||
0a1b45a2 | 5356 | static bool |
5522f910 NC |
5357 | elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
5358 | bfd *obfd ATTRIBUTE_UNUSED, | |
5359 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
5360 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
5361 | { |
5362 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
5363 | and sh_link fields of Solaris specific section types. */ | |
0a1b45a2 | 5364 | return false; |
84865015 NC |
5365 | } |
5366 | ||
5522f910 NC |
5367 | #undef elf_backend_copy_special_section_fields |
5368 | #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields | |
84865015 | 5369 | |
a6cc6b3b RO |
5370 | #include "elf64-target.h" |
5371 | ||
8059fb19 RM |
5372 | /* Restore defaults. */ |
5373 | #undef ELF_OSABI | |
5374 | #undef elf_backend_static_tls_alignment | |
5375 | #undef elf_backend_want_plt_sym | |
5376 | #define elf_backend_want_plt_sym 0 | |
84865015 | 5377 | #undef elf_backend_strtab_flags |
5522f910 | 5378 | #undef elf_backend_copy_special_section_fields |
8059fb19 | 5379 | |
8a9036a4 L |
5380 | /* Intel L1OM support. */ |
5381 | ||
0a1b45a2 | 5382 | static bool |
8a9036a4 L |
5383 | elf64_l1om_elf_object_p (bfd *abfd) |
5384 | { | |
5385 | /* Set the right machine number for an L1OM elf64 file. */ | |
5386 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
0a1b45a2 | 5387 | return true; |
8a9036a4 L |
5388 | } |
5389 | ||
5390 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5391 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
5392 | #undef TARGET_LITTLE_NAME |
5393 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
5394 | #undef ELF_ARCH | |
5395 | #define ELF_ARCH bfd_arch_l1om | |
5396 | ||
5397 | #undef ELF_MACHINE_CODE | |
5398 | #define ELF_MACHINE_CODE EM_L1OM | |
5399 | ||
5400 | #undef ELF_OSABI | |
5401 | ||
5402 | #undef elf64_bed | |
5403 | #define elf64_bed elf64_l1om_bed | |
5404 | ||
5405 | #undef elf_backend_object_p | |
5406 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
5407 | ||
8059fb19 RM |
5408 | /* Restore defaults. */ |
5409 | #undef ELF_MAXPAGESIZE | |
5410 | #undef ELF_MINPAGESIZE | |
5411 | #undef ELF_COMMONPAGESIZE | |
f6aec96d L |
5412 | #if DEFAULT_LD_Z_SEPARATE_CODE |
5413 | # define ELF_MAXPAGESIZE 0x1000 | |
5414 | #else | |
5415 | # define ELF_MAXPAGESIZE 0x200000 | |
5416 | #endif | |
8059fb19 RM |
5417 | #define ELF_MINPAGESIZE 0x1000 |
5418 | #define ELF_COMMONPAGESIZE 0x1000 | |
5419 | #undef elf_backend_plt_alignment | |
5420 | #define elf_backend_plt_alignment 4 | |
90c14f0c | 5421 | #undef ELF_TARGET_OS |
1a0c107f | 5422 | |
8a9036a4 L |
5423 | #include "elf64-target.h" |
5424 | ||
5425 | /* FreeBSD L1OM support. */ | |
5426 | ||
5427 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5428 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
5429 | #undef TARGET_LITTLE_NAME |
5430 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
5431 | ||
5432 | #undef ELF_OSABI | |
5433 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5434 | ||
5435 | #undef elf64_bed | |
5436 | #define elf64_bed elf64_l1om_fbsd_bed | |
5437 | ||
8a9036a4 | 5438 | #include "elf64-target.h" |
351f65ca | 5439 | |
7a9068fe L |
5440 | /* Intel K1OM support. */ |
5441 | ||
0a1b45a2 | 5442 | static bool |
7a9068fe L |
5443 | elf64_k1om_elf_object_p (bfd *abfd) |
5444 | { | |
5445 | /* Set the right machine number for an K1OM elf64 file. */ | |
5446 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
0a1b45a2 | 5447 | return true; |
7a9068fe L |
5448 | } |
5449 | ||
5450 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5451 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
5452 | #undef TARGET_LITTLE_NAME |
5453 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
5454 | #undef ELF_ARCH | |
5455 | #define ELF_ARCH bfd_arch_k1om | |
5456 | ||
5457 | #undef ELF_MACHINE_CODE | |
5458 | #define ELF_MACHINE_CODE EM_K1OM | |
5459 | ||
5460 | #undef ELF_OSABI | |
5461 | ||
5462 | #undef elf64_bed | |
5463 | #define elf64_bed elf64_k1om_bed | |
5464 | ||
5465 | #undef elf_backend_object_p | |
5466 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
5467 | ||
7a9068fe L |
5468 | #include "elf64-target.h" |
5469 | ||
5470 | /* FreeBSD K1OM support. */ | |
5471 | ||
5472 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5473 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
5474 | #undef TARGET_LITTLE_NAME |
5475 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
5476 | ||
5477 | #undef ELF_OSABI | |
5478 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5479 | ||
5480 | #undef elf64_bed | |
5481 | #define elf64_bed elf64_k1om_fbsd_bed | |
5482 | ||
5483 | #include "elf64-target.h" | |
5484 | ||
351f65ca L |
5485 | /* 32bit x86-64 support. */ |
5486 | ||
351f65ca | 5487 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5488 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
5489 | #undef TARGET_LITTLE_NAME |
5490 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 5491 | #undef elf32_bed |
bbd19b19 | 5492 | #define elf32_bed elf32_x86_64_bed |
351f65ca L |
5493 | |
5494 | #undef ELF_ARCH | |
5495 | #define ELF_ARCH bfd_arch_i386 | |
5496 | ||
5497 | #undef ELF_MACHINE_CODE | |
5498 | #define ELF_MACHINE_CODE EM_X86_64 | |
5499 | ||
351f65ca L |
5500 | #undef ELF_OSABI |
5501 | ||
bbd19b19 L |
5502 | #define bfd_elf32_bfd_reloc_type_lookup \ |
5503 | elf_x86_64_reloc_type_lookup | |
5504 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
5505 | elf_x86_64_reloc_name_lookup | |
5506 | #define bfd_elf32_get_synthetic_symtab \ | |
5507 | elf_x86_64_get_synthetic_symtab | |
5508 | ||
351f65ca L |
5509 | #undef elf_backend_object_p |
5510 | #define elf_backend_object_p \ | |
5511 | elf32_x86_64_elf_object_p | |
5512 | ||
5513 | #undef elf_backend_bfd_from_remote_memory | |
5514 | #define elf_backend_bfd_from_remote_memory \ | |
5515 | _bfd_elf32_bfd_from_remote_memory | |
5516 | ||
5517 | #undef elf_backend_size_info | |
5518 | #define elf_backend_size_info \ | |
5519 | _bfd_elf32_size_info | |
5520 | ||
5521 | #include "elf32-target.h" |