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351f65ca | 1 | /* X86-64 specific support for ELF |
fd67aa11 | 2 | Copyright (C) 2000-2024 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" |
cf0e0a0b | 25 | #include "sframe.h" |
8d88c4ca | 26 | |
56ceb5b5 | 27 | #include "opcode/i386.h" |
8d88c4ca | 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 | { | |
c94cb026 | 47 | HOWTO(R_X86_64_NONE, 0, 0, 0, false, 0, complain_overflow_dont, |
17c6c3b9 | 48 | bfd_elf_generic_reloc, "R_X86_64_NONE", false, 0, 0x00000000, |
0a1b45a2 | 49 | false), |
c94cb026 | 50 | HOWTO(R_X86_64_64, 0, 8, 64, false, 0, complain_overflow_dont, |
17c6c3b9 | 51 | bfd_elf_generic_reloc, "R_X86_64_64", false, 0, MINUS_ONE, |
0a1b45a2 | 52 | false), |
c94cb026 | 53 | HOWTO(R_X86_64_PC32, 0, 4, 32, true, 0, complain_overflow_signed, |
17c6c3b9 | 54 | bfd_elf_generic_reloc, "R_X86_64_PC32", false, 0, 0xffffffff, |
0a1b45a2 | 55 | true), |
c94cb026 | 56 | HOWTO(R_X86_64_GOT32, 0, 4, 32, false, 0, complain_overflow_signed, |
17c6c3b9 | 57 | bfd_elf_generic_reloc, "R_X86_64_GOT32", false, 0, 0xffffffff, |
0a1b45a2 | 58 | false), |
c94cb026 | 59 | HOWTO(R_X86_64_PLT32, 0, 4, 32, true, 0, complain_overflow_signed, |
17c6c3b9 | 60 | bfd_elf_generic_reloc, "R_X86_64_PLT32", false, 0, 0xffffffff, |
0a1b45a2 | 61 | true), |
c94cb026 | 62 | HOWTO(R_X86_64_COPY, 0, 4, 32, false, 0, complain_overflow_bitfield, |
17c6c3b9 | 63 | bfd_elf_generic_reloc, "R_X86_64_COPY", false, 0, 0xffffffff, |
0a1b45a2 | 64 | false), |
c94cb026 | 65 | HOWTO(R_X86_64_GLOB_DAT, 0, 8, 64, false, 0, complain_overflow_dont, |
17c6c3b9 JB |
66 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", false, 0, MINUS_ONE, |
67 | false), | |
c94cb026 | 68 | HOWTO(R_X86_64_JUMP_SLOT, 0, 8, 64, false, 0, complain_overflow_dont, |
17c6c3b9 JB |
69 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", false, 0, MINUS_ONE, |
70 | false), | |
c94cb026 | 71 | HOWTO(R_X86_64_RELATIVE, 0, 8, 64, false, 0, complain_overflow_dont, |
17c6c3b9 JB |
72 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", false, 0, MINUS_ONE, |
73 | false), | |
c94cb026 | 74 | HOWTO(R_X86_64_GOTPCREL, 0, 4, 32, true, 0, complain_overflow_signed, |
17c6c3b9 JB |
75 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", false, 0, 0xffffffff, |
76 | true), | |
c94cb026 | 77 | HOWTO(R_X86_64_32, 0, 4, 32, false, 0, complain_overflow_unsigned, |
17c6c3b9 | 78 | bfd_elf_generic_reloc, "R_X86_64_32", false, 0, 0xffffffff, |
0a1b45a2 | 79 | false), |
c94cb026 | 80 | HOWTO(R_X86_64_32S, 0, 4, 32, false, 0, complain_overflow_signed, |
17c6c3b9 | 81 | bfd_elf_generic_reloc, "R_X86_64_32S", false, 0, 0xffffffff, |
0a1b45a2 | 82 | false), |
c94cb026 | 83 | HOWTO(R_X86_64_16, 0, 2, 16, false, 0, complain_overflow_bitfield, |
17c6c3b9 | 84 | bfd_elf_generic_reloc, "R_X86_64_16", false, 0, 0xffff, false), |
c94cb026 | 85 | HOWTO(R_X86_64_PC16, 0, 2, 16, true, 0, complain_overflow_bitfield, |
17c6c3b9 | 86 | bfd_elf_generic_reloc, "R_X86_64_PC16", false, 0, 0xffff, true), |
c94cb026 | 87 | HOWTO(R_X86_64_8, 0, 1, 8, false, 0, complain_overflow_bitfield, |
17c6c3b9 | 88 | bfd_elf_generic_reloc, "R_X86_64_8", false, 0, 0xff, false), |
c94cb026 | 89 | HOWTO(R_X86_64_PC8, 0, 1, 8, true, 0, complain_overflow_signed, |
17c6c3b9 | 90 | bfd_elf_generic_reloc, "R_X86_64_PC8", false, 0, 0xff, true), |
c94cb026 | 91 | HOWTO(R_X86_64_DTPMOD64, 0, 8, 64, false, 0, complain_overflow_dont, |
17c6c3b9 JB |
92 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", false, 0, MINUS_ONE, |
93 | false), | |
c94cb026 | 94 | HOWTO(R_X86_64_DTPOFF64, 0, 8, 64, false, 0, complain_overflow_dont, |
17c6c3b9 JB |
95 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", false, 0, MINUS_ONE, |
96 | false), | |
c94cb026 | 97 | HOWTO(R_X86_64_TPOFF64, 0, 8, 64, false, 0, complain_overflow_dont, |
17c6c3b9 JB |
98 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", false, 0, MINUS_ONE, |
99 | false), | |
c94cb026 | 100 | HOWTO(R_X86_64_TLSGD, 0, 4, 32, true, 0, complain_overflow_signed, |
17c6c3b9 JB |
101 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", false, 0, 0xffffffff, |
102 | true), | |
c94cb026 | 103 | HOWTO(R_X86_64_TLSLD, 0, 4, 32, true, 0, complain_overflow_signed, |
17c6c3b9 JB |
104 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", false, 0, 0xffffffff, |
105 | true), | |
c94cb026 | 106 | HOWTO(R_X86_64_DTPOFF32, 0, 4, 32, false, 0, complain_overflow_signed, |
17c6c3b9 JB |
107 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", false, 0, 0xffffffff, |
108 | false), | |
c94cb026 | 109 | HOWTO(R_X86_64_GOTTPOFF, 0, 4, 32, true, 0, complain_overflow_signed, |
17c6c3b9 JB |
110 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", false, 0, 0xffffffff, |
111 | true), | |
c94cb026 | 112 | HOWTO(R_X86_64_TPOFF32, 0, 4, 32, false, 0, complain_overflow_signed, |
17c6c3b9 JB |
113 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", false, 0, 0xffffffff, |
114 | false), | |
c94cb026 | 115 | HOWTO(R_X86_64_PC64, 0, 8, 64, true, 0, complain_overflow_dont, |
17c6c3b9 | 116 | bfd_elf_generic_reloc, "R_X86_64_PC64", false, 0, MINUS_ONE, |
0a1b45a2 | 117 | true), |
c94cb026 | 118 | HOWTO(R_X86_64_GOTOFF64, 0, 8, 64, false, 0, complain_overflow_dont, |
17c6c3b9 JB |
119 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", false, 0, MINUS_ONE, |
120 | false), | |
c94cb026 | 121 | HOWTO(R_X86_64_GOTPC32, 0, 4, 32, true, 0, complain_overflow_signed, |
17c6c3b9 JB |
122 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", false, 0, 0xffffffff, |
123 | true), | |
c94cb026 | 124 | HOWTO(R_X86_64_GOT64, 0, 8, 64, false, 0, complain_overflow_signed, |
17c6c3b9 | 125 | bfd_elf_generic_reloc, "R_X86_64_GOT64", false, 0, MINUS_ONE, |
0a1b45a2 | 126 | false), |
c94cb026 | 127 | HOWTO(R_X86_64_GOTPCREL64, 0, 8, 64, true, 0, complain_overflow_signed, |
17c6c3b9 JB |
128 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", false, 0, MINUS_ONE, |
129 | true), | |
c94cb026 | 130 | HOWTO(R_X86_64_GOTPC64, 0, 8, 64, true, 0, complain_overflow_signed, |
17c6c3b9 JB |
131 | bfd_elf_generic_reloc, "R_X86_64_GOTPC64", false, 0, MINUS_ONE, |
132 | true), | |
c94cb026 | 133 | HOWTO(R_X86_64_GOTPLT64, 0, 8, 64, false, 0, complain_overflow_signed, |
17c6c3b9 JB |
134 | bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", false, 0, MINUS_ONE, |
135 | false), | |
c94cb026 | 136 | HOWTO(R_X86_64_PLTOFF64, 0, 8, 64, false, 0, complain_overflow_signed, |
17c6c3b9 JB |
137 | bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", false, 0, MINUS_ONE, |
138 | false), | |
c94cb026 | 139 | HOWTO(R_X86_64_SIZE32, 0, 4, 32, false, 0, complain_overflow_unsigned, |
17c6c3b9 | 140 | bfd_elf_generic_reloc, "R_X86_64_SIZE32", false, 0, 0xffffffff, |
0a1b45a2 | 141 | false), |
c94cb026 | 142 | HOWTO(R_X86_64_SIZE64, 0, 8, 64, false, 0, complain_overflow_dont, |
17c6c3b9 | 143 | bfd_elf_generic_reloc, "R_X86_64_SIZE64", false, 0, MINUS_ONE, |
0a1b45a2 | 144 | false), |
c94cb026 | 145 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 4, 32, true, 0, |
67a4f2b7 | 146 | complain_overflow_bitfield, bfd_elf_generic_reloc, |
17c6c3b9 | 147 | "R_X86_64_GOTPC32_TLSDESC", false, 0, 0xffffffff, true), |
c94cb026 | 148 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, false, 0, |
67a4f2b7 AO |
149 | complain_overflow_dont, bfd_elf_generic_reloc, |
150 | "R_X86_64_TLSDESC_CALL", | |
0a1b45a2 | 151 | false, 0, 0, false), |
c94cb026 | 152 | HOWTO(R_X86_64_TLSDESC, 0, 8, 64, false, 0, |
4c398cc0 | 153 | complain_overflow_dont, bfd_elf_generic_reloc, |
17c6c3b9 | 154 | "R_X86_64_TLSDESC", false, 0, MINUS_ONE, false), |
c94cb026 | 155 | HOWTO(R_X86_64_IRELATIVE, 0, 8, 64, false, 0, complain_overflow_dont, |
17c6c3b9 JB |
156 | bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", false, 0, MINUS_ONE, |
157 | false), | |
c94cb026 | 158 | HOWTO(R_X86_64_RELATIVE64, 0, 8, 64, false, 0, complain_overflow_dont, |
17c6c3b9 JB |
159 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", false, 0, MINUS_ONE, |
160 | false), | |
c94cb026 | 161 | HOWTO(R_X86_64_PC32_BND, 0, 4, 32, true, 0, complain_overflow_signed, |
17c6c3b9 | 162 | bfd_elf_generic_reloc, "R_X86_64_PC32_BND", false, 0, 0xffffffff, |
0a1b45a2 | 163 | true), |
c94cb026 | 164 | HOWTO(R_X86_64_PLT32_BND, 0, 4, 32, true, 0, complain_overflow_signed, |
17c6c3b9 | 165 | bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", false, 0, 0xffffffff, |
0a1b45a2 | 166 | true), |
c94cb026 | 167 | HOWTO(R_X86_64_GOTPCRELX, 0, 4, 32, true, 0, complain_overflow_signed, |
17c6c3b9 JB |
168 | bfd_elf_generic_reloc, "R_X86_64_GOTPCRELX", false, 0, 0xffffffff, |
169 | true), | |
c94cb026 | 170 | HOWTO(R_X86_64_REX_GOTPCRELX, 0, 4, 32, true, 0, complain_overflow_signed, |
17c6c3b9 JB |
171 | bfd_elf_generic_reloc, "R_X86_64_REX_GOTPCRELX", false, 0, 0xffffffff, |
172 | true), | |
3d5a60de L |
173 | HOWTO(R_X86_64_CODE_4_GOTPCRELX, 0, 4, 32, true, 0, complain_overflow_signed, |
174 | bfd_elf_generic_reloc, "R_X86_64_CODE_4_GOTPCRELX", false, 0, 0xffffffff, | |
175 | true), | |
a533c8df L |
176 | HOWTO(R_X86_64_CODE_4_GOTTPOFF, 0, 4, 32, true, 0, complain_overflow_signed, |
177 | bfd_elf_generic_reloc, "R_X86_64_CODE_4_GOTTPOFF", false, 0, 0xffffffff, | |
178 | true), | |
179 | HOWTO(R_X86_64_CODE_4_GOTPC32_TLSDESC, 0, 4, 32, true, 0, | |
180 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
181 | "R_X86_64_CODE_4_GOTPC32_TLSDESC", false, 0, 0xffffffff, true), | |
5bc71c2a L |
182 | HOWTO(R_X86_64_CODE_5_GOTPCRELX, 0, 4, 32, true, 0, |
183 | complain_overflow_signed, bfd_elf_generic_reloc, | |
184 | "R_X86_64_CODE_5_GOTPCRELX", false, 0, 0xffffffff, true), | |
185 | HOWTO(R_X86_64_CODE_5_GOTTPOFF, 0, 4, 32, true, 0, | |
186 | complain_overflow_signed, bfd_elf_generic_reloc, | |
187 | "R_X86_64_CODE_5_GOTTPOFF", false, 0, 0xffffffff, true), | |
188 | HOWTO(R_X86_64_CODE_5_GOTPC32_TLSDESC, 0, 4, 32, true, 0, | |
189 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
190 | "R_X86_64_CODE_5_GOTPC32_TLSDESC", false, 0, 0xffffffff, true), | |
191 | HOWTO(R_X86_64_CODE_6_GOTPCRELX, 0, 4, 32, true, 0, | |
192 | complain_overflow_signed, bfd_elf_generic_reloc, | |
193 | "R_X86_64_CODE_6_GOTPCRELX", false, 0, 0xffffffff, true), | |
194 | HOWTO(R_X86_64_CODE_6_GOTTPOFF, 0, 4, 32, true, 0, | |
195 | complain_overflow_signed, bfd_elf_generic_reloc, | |
196 | "R_X86_64_CODE_6_GOTTPOFF", false, 0, 0xffffffff, true), | |
197 | HOWTO(R_X86_64_CODE_6_GOTPC32_TLSDESC, 0, 4, 32, true, 0, | |
198 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
199 | "R_X86_64_CODE_6_GOTPC32_TLSDESC", false, 0, 0xffffffff, true), | |
fe4770f4 | 200 | |
a33d77bc JB |
201 | /* We have a gap in the reloc numbers here. |
202 | R_X86_64_standard counts the number up to this point, and | |
203 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
204 | R_X86_64_GNU_VT* to form an index into this table. */ | |
5bc71c2a | 205 | #define R_X86_64_standard (R_X86_64_CODE_6_GOTPC32_TLSDESC + 1) |
a33d77bc JB |
206 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
207 | ||
fe4770f4 | 208 | /* GNU extension to record C++ vtable hierarchy. */ |
c94cb026 | 209 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 8, 0, false, 0, complain_overflow_dont, |
0a1b45a2 | 210 | NULL, "R_X86_64_GNU_VTINHERIT", false, 0, 0, false), |
fe4770f4 AJ |
211 | |
212 | /* GNU extension to record C++ vtable member usage. */ | |
c94cb026 | 213 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 8, 0, false, 0, complain_overflow_dont, |
0a1b45a2 AM |
214 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", false, 0, 0, |
215 | false), | |
d7921315 L |
216 | |
217 | /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */ | |
c94cb026 | 218 | HOWTO(R_X86_64_32, 0, 4, 32, false, 0, complain_overflow_bitfield, |
17c6c3b9 | 219 | bfd_elf_generic_reloc, "R_X86_64_32", false, 0, 0xffffffff, |
0a1b45a2 | 220 | false) |
8d88c4ca NC |
221 | }; |
222 | ||
223 | /* Map BFD relocs to the x86_64 elf relocs. */ | |
70256ad8 AJ |
224 | struct elf_reloc_map |
225 | { | |
8d88c4ca NC |
226 | bfd_reloc_code_real_type bfd_reloc_val; |
227 | unsigned char elf_reloc_val; | |
228 | }; | |
229 | ||
dc810e39 | 230 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 231 | { |
70256ad8 AJ |
232 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
233 | { BFD_RELOC_64, R_X86_64_64, }, | |
234 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
235 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
236 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
237 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
238 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
239 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
240 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
241 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
242 | { BFD_RELOC_32, R_X86_64_32, }, | |
243 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
244 | { BFD_RELOC_16, R_X86_64_16, }, | |
245 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
246 | { BFD_RELOC_8, R_X86_64_8, }, | |
247 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
248 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
249 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
250 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
251 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
252 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
253 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
254 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
255 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
256 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
257 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
258 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
259 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
260 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
261 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
262 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
263 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
1788fc08 L |
264 | { BFD_RELOC_SIZE32, R_X86_64_SIZE32, }, |
265 | { BFD_RELOC_SIZE64, R_X86_64_SIZE64, }, | |
67a4f2b7 AO |
266 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
267 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
268 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
cbe950e9 | 269 | { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, }, |
56ceb5b5 L |
270 | { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND, }, |
271 | { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND, }, | |
272 | { BFD_RELOC_X86_64_GOTPCRELX, R_X86_64_GOTPCRELX, }, | |
273 | { BFD_RELOC_X86_64_REX_GOTPCRELX, R_X86_64_REX_GOTPCRELX, }, | |
3d5a60de | 274 | { BFD_RELOC_X86_64_CODE_4_GOTPCRELX, R_X86_64_CODE_4_GOTPCRELX, }, |
a533c8df L |
275 | { BFD_RELOC_X86_64_CODE_4_GOTTPOFF, R_X86_64_CODE_4_GOTTPOFF, }, |
276 | { BFD_RELOC_X86_64_CODE_4_GOTPC32_TLSDESC, R_X86_64_CODE_4_GOTPC32_TLSDESC, }, | |
5bc71c2a L |
277 | { BFD_RELOC_X86_64_CODE_5_GOTPCRELX, R_X86_64_CODE_5_GOTPCRELX, }, |
278 | { BFD_RELOC_X86_64_CODE_5_GOTTPOFF, R_X86_64_CODE_5_GOTTPOFF, }, | |
279 | { BFD_RELOC_X86_64_CODE_5_GOTPC32_TLSDESC, R_X86_64_CODE_5_GOTPC32_TLSDESC, }, | |
280 | { BFD_RELOC_X86_64_CODE_6_GOTPCRELX, R_X86_64_CODE_6_GOTPCRELX, }, | |
281 | { BFD_RELOC_X86_64_CODE_6_GOTTPOFF, R_X86_64_CODE_6_GOTTPOFF, }, | |
282 | { BFD_RELOC_X86_64_CODE_6_GOTPC32_TLSDESC, R_X86_64_CODE_6_GOTPC32_TLSDESC, }, | |
fe4770f4 AJ |
283 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
284 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
285 | }; |
286 | ||
67a4f2b7 | 287 | static reloc_howto_type * |
351f65ca | 288 | elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) |
67a4f2b7 AO |
289 | { |
290 | unsigned i; | |
291 | ||
d7921315 L |
292 | if (r_type == (unsigned int) R_X86_64_32) |
293 | { | |
294 | if (ABI_64_P (abfd)) | |
295 | i = r_type; | |
296 | else | |
297 | i = ARRAY_SIZE (x86_64_elf_howto_table) - 1; | |
298 | } | |
299 | else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
300 | || r_type >= (unsigned int) R_X86_64_max) | |
67a4f2b7 AO |
301 | { |
302 | if (r_type >= (unsigned int) R_X86_64_standard) | |
303 | { | |
695344c0 | 304 | /* xgettext:c-format */ |
0aa13fee AM |
305 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
306 | abfd, r_type); | |
f3185997 NC |
307 | bfd_set_error (bfd_error_bad_value); |
308 | return NULL; | |
67a4f2b7 AO |
309 | } |
310 | i = r_type; | |
311 | } | |
312 | else | |
313 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
314 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
315 | return &x86_64_elf_howto_table[i]; | |
316 | } | |
8d88c4ca NC |
317 | |
318 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
319 | static reloc_howto_type * | |
351f65ca L |
320 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
321 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
322 | { |
323 | unsigned int i; | |
27482721 | 324 | |
8d88c4ca NC |
325 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
326 | i++) | |
327 | { | |
328 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
329 | return elf_x86_64_rtype_to_howto (abfd, |
330 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca | 331 | } |
5860e3f8 | 332 | return NULL; |
8d88c4ca NC |
333 | } |
334 | ||
157090f7 | 335 | static reloc_howto_type * |
d7921315 | 336 | elf_x86_64_reloc_name_lookup (bfd *abfd, |
351f65ca | 337 | const char *r_name) |
157090f7 AM |
338 | { |
339 | unsigned int i; | |
340 | ||
d7921315 L |
341 | if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0) |
342 | { | |
343 | /* Get x32 R_X86_64_32. */ | |
344 | reloc_howto_type *reloc | |
345 | = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1]; | |
346 | BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32); | |
347 | return reloc; | |
348 | } | |
349 | ||
350 | for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++) | |
157090f7 AM |
351 | if (x86_64_elf_howto_table[i].name != NULL |
352 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
353 | return &x86_64_elf_howto_table[i]; | |
354 | ||
355 | return NULL; | |
356 | } | |
357 | ||
8d88c4ca | 358 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 359 | |
0a1b45a2 | 360 | static bool |
f3185997 | 361 | elf_x86_64_info_to_howto (bfd *abfd, arelent *cache_ptr, |
351f65ca | 362 | Elf_Internal_Rela *dst) |
8d88c4ca | 363 | { |
67a4f2b7 | 364 | unsigned r_type; |
8d88c4ca | 365 | |
351f65ca L |
366 | r_type = ELF32_R_TYPE (dst->r_info); |
367 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); | |
f3185997 | 368 | if (cache_ptr->howto == NULL) |
0a1b45a2 | 369 | return false; |
262c0a87 | 370 | BFD_ASSERT (r_type == cache_ptr->howto->type || cache_ptr->howto->type == R_X86_64_NONE); |
0a1b45a2 | 371 | return true; |
8d88c4ca | 372 | } |
70256ad8 | 373 | \f |
3bab7989 | 374 | /* Support for core dump NOTE sections. */ |
0a1b45a2 | 375 | static bool |
351f65ca | 376 | elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
377 | { |
378 | int offset; | |
eea6121a | 379 | size_t size; |
3bab7989 ML |
380 | |
381 | switch (note->descsz) | |
382 | { | |
383 | default: | |
0a1b45a2 | 384 | return false; |
3bab7989 | 385 | |
bcd823f1 L |
386 | case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */ |
387 | /* pr_cursig */ | |
228e534f | 388 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
bcd823f1 L |
389 | |
390 | /* pr_pid */ | |
228e534f | 391 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
bcd823f1 L |
392 | |
393 | /* pr_reg */ | |
394 | offset = 72; | |
395 | size = 216; | |
396 | ||
397 | break; | |
398 | ||
3bab7989 ML |
399 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ |
400 | /* pr_cursig */ | |
228e534f | 401 | elf_tdata (abfd)->core->signal |
3bab7989 ML |
402 | = bfd_get_16 (abfd, note->descdata + 12); |
403 | ||
404 | /* pr_pid */ | |
228e534f | 405 | elf_tdata (abfd)->core->lwpid |
3bab7989 ML |
406 | = bfd_get_32 (abfd, note->descdata + 32); |
407 | ||
408 | /* pr_reg */ | |
409 | offset = 112; | |
eea6121a | 410 | size = 216; |
3bab7989 ML |
411 | |
412 | break; | |
413 | } | |
414 | ||
415 | /* Make a ".reg/999" section. */ | |
416 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 417 | size, note->descpos + offset); |
3bab7989 ML |
418 | } |
419 | ||
0a1b45a2 | 420 | static bool |
351f65ca | 421 | elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
422 | { |
423 | switch (note->descsz) | |
424 | { | |
425 | default: | |
0a1b45a2 | 426 | return false; |
3bab7989 | 427 | |
c3846307 FW |
428 | case 124: |
429 | /* sizeof (struct elf_external_linux_prpsinfo32_ugid16). */ | |
228e534f | 430 | elf_tdata (abfd)->core->pid |
bcd823f1 | 431 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 432 | elf_tdata (abfd)->core->program |
bcd823f1 | 433 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 434 | elf_tdata (abfd)->core->command |
bcd823f1 L |
435 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
436 | break; | |
437 | ||
c3846307 FW |
438 | case 128: |
439 | /* sizeof (struct elf_external_linux_prpsinfo32_ugid32). */ | |
440 | elf_tdata (abfd)->core->pid | |
441 | = bfd_get_32 (abfd, note->descdata + 12); | |
442 | elf_tdata (abfd)->core->program | |
443 | = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); | |
444 | elf_tdata (abfd)->core->command | |
445 | = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); | |
446 | break; | |
447 | ||
448 | case 136: | |
449 | /* sizeof (struct elf_prpsinfo) on Linux/x86_64. */ | |
228e534f | 450 | elf_tdata (abfd)->core->pid |
261b8d08 | 451 | = bfd_get_32 (abfd, note->descdata + 24); |
228e534f | 452 | elf_tdata (abfd)->core->program |
3bab7989 | 453 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
228e534f | 454 | elf_tdata (abfd)->core->command |
3bab7989 ML |
455 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
456 | } | |
457 | ||
458 | /* Note that for some reason, a spurious space is tacked | |
459 | onto the end of the args in some (at least one anyway) | |
460 | implementations, so strip it off if it exists. */ | |
461 | ||
462 | { | |
228e534f | 463 | char *command = elf_tdata (abfd)->core->command; |
3bab7989 ML |
464 | int n = strlen (command); |
465 | ||
466 | if (0 < n && command[n - 1] == ' ') | |
467 | command[n - 1] = '\0'; | |
468 | } | |
469 | ||
0a1b45a2 | 470 | return true; |
3bab7989 | 471 | } |
8fd79e71 L |
472 | |
473 | #ifdef CORE_HEADER | |
602f1657 AM |
474 | # if GCC_VERSION >= 8000 |
475 | # pragma GCC diagnostic push | |
476 | # pragma GCC diagnostic ignored "-Wstringop-truncation" | |
477 | # endif | |
8fd79e71 L |
478 | static char * |
479 | elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz, | |
480 | int note_type, ...) | |
481 | { | |
482 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8fd79e71 L |
483 | va_list ap; |
484 | const char *fname, *psargs; | |
485 | long pid; | |
486 | int cursig; | |
487 | const void *gregs; | |
488 | ||
489 | switch (note_type) | |
490 | { | |
491 | default: | |
492 | return NULL; | |
493 | ||
494 | case NT_PRPSINFO: | |
495 | va_start (ap, note_type); | |
496 | fname = va_arg (ap, const char *); | |
497 | psargs = va_arg (ap, const char *); | |
498 | va_end (ap); | |
499 | ||
500 | if (bed->s->elfclass == ELFCLASS32) | |
501 | { | |
502 | prpsinfo32_t data; | |
503 | memset (&data, 0, sizeof (data)); | |
504 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
505 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
506 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
507 | &data, sizeof (data)); | |
8fd79e71 L |
508 | } |
509 | else | |
510 | { | |
b1bd052d | 511 | prpsinfo64_t data; |
8fd79e71 L |
512 | memset (&data, 0, sizeof (data)); |
513 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
514 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
515 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
516 | &data, sizeof (data)); | |
8fd79e71 | 517 | } |
e85c6a70 | 518 | /* NOTREACHED */ |
8fd79e71 L |
519 | |
520 | case NT_PRSTATUS: | |
521 | va_start (ap, note_type); | |
522 | pid = va_arg (ap, long); | |
523 | cursig = va_arg (ap, int); | |
524 | gregs = va_arg (ap, const void *); | |
525 | va_end (ap); | |
526 | ||
527 | if (bed->s->elfclass == ELFCLASS32) | |
528 | { | |
529 | if (bed->elf_machine_code == EM_X86_64) | |
530 | { | |
531 | prstatusx32_t prstat; | |
532 | memset (&prstat, 0, sizeof (prstat)); | |
533 | prstat.pr_pid = pid; | |
534 | prstat.pr_cursig = cursig; | |
535 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
536 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
537 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
538 | } |
539 | else | |
540 | { | |
541 | prstatus32_t prstat; | |
542 | memset (&prstat, 0, sizeof (prstat)); | |
543 | prstat.pr_pid = pid; | |
544 | prstat.pr_cursig = cursig; | |
545 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
546 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
547 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
548 | } |
549 | } | |
550 | else | |
551 | { | |
b1bd052d | 552 | prstatus64_t prstat; |
8fd79e71 L |
553 | memset (&prstat, 0, sizeof (prstat)); |
554 | prstat.pr_pid = pid; | |
555 | prstat.pr_cursig = cursig; | |
556 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
557 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
558 | &prstat, sizeof (prstat)); | |
8fd79e71 | 559 | } |
8fd79e71 | 560 | } |
e85c6a70 | 561 | /* NOTREACHED */ |
8fd79e71 | 562 | } |
602f1657 AM |
563 | # if GCC_VERSION >= 8000 |
564 | # pragma GCC diagnostic pop | |
565 | # endif | |
8fd79e71 | 566 | #endif |
3bab7989 | 567 | \f |
407443a3 | 568 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 569 | |
70256ad8 AJ |
570 | /* The size in bytes of an entry in the global offset table. */ |
571 | ||
572 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 573 | |
38b12349 | 574 | /* The size in bytes of an entry in the lazy procedure linkage table. */ |
8d88c4ca | 575 | |
38b12349 | 576 | #define LAZY_PLT_ENTRY_SIZE 16 |
70256ad8 | 577 | |
38b12349 L |
578 | /* The size in bytes of an entry in the non-lazy procedure linkage |
579 | table. */ | |
70256ad8 | 580 | |
38b12349 L |
581 | #define NON_LAZY_PLT_ENTRY_SIZE 8 |
582 | ||
583 | /* The first entry in a lazy procedure linkage table looks like this. | |
584 | See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this | |
585 | works. */ | |
586 | ||
587 | static const bfd_byte elf_x86_64_lazy_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
70256ad8 | 588 | { |
653165cc AJ |
589 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
590 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 591 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
592 | }; |
593 | ||
38b12349 | 594 | /* Subsequent entries in a lazy procedure linkage table look like this. */ |
70256ad8 | 595 | |
38b12349 | 596 | static const bfd_byte elf_x86_64_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
70256ad8 | 597 | { |
653165cc | 598 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 599 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 600 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
601 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
602 | 0xe9, /* jmp relative */ | |
603 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
604 | }; | |
605 | ||
38b12349 | 606 | /* The first entry in a lazy procedure linkage table with BND prefix |
0ff2b86e L |
607 | like this. */ |
608 | ||
38b12349 | 609 | static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 610 | { |
07d6d2b8 | 611 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
0ff2b86e | 612 | 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */ |
07d6d2b8 | 613 | 0x0f, 0x1f, 0 /* nopl (%rax) */ |
0ff2b86e L |
614 | }; |
615 | ||
38b12349 L |
616 | /* Subsequent entries for branches with BND prefx in a lazy procedure |
617 | linkage table look like this. */ | |
0ff2b86e | 618 | |
38b12349 | 619 | static const bfd_byte elf_x86_64_lazy_bnd_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 620 | { |
07d6d2b8 AM |
621 | 0x68, 0, 0, 0, 0, /* pushq immediate */ |
622 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
623 | 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */ | |
0ff2b86e L |
624 | }; |
625 | ||
ee2fdd6f L |
626 | /* The first entry in the IBT-enabled lazy procedure linkage table is the |
627 | the same as the lazy PLT with BND prefix so that bound registers are | |
628 | preserved when control is passed to dynamic linker. Subsequent | |
629 | entries for a IBT-enabled lazy procedure linkage table look like | |
630 | this. */ | |
631 | ||
632 | static const bfd_byte elf_x86_64_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
633 | { | |
07d6d2b8 AM |
634 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
635 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
636 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
637 | 0x90 /* nop */ | |
ee2fdd6f L |
638 | }; |
639 | ||
640 | /* The first entry in the x32 IBT-enabled lazy procedure linkage table | |
de194d85 | 641 | is the same as the normal lazy PLT. Subsequent entries for an |
ee2fdd6f L |
642 | x32 IBT-enabled lazy procedure linkage table look like this. */ |
643 | ||
644 | static const bfd_byte elf_x32_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
645 | { | |
07d6d2b8 AM |
646 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
647 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
648 | 0xe9, 0, 0, 0, 0, /* jmpq relative */ | |
649 | 0x66, 0x90 /* xchg %ax,%ax */ | |
ee2fdd6f L |
650 | }; |
651 | ||
38b12349 | 652 | /* Entries in the non-lazey procedure linkage table look like this. */ |
0ff2b86e | 653 | |
38b12349 | 654 | static const bfd_byte elf_x86_64_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 655 | { |
07d6d2b8 AM |
656 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
657 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
658 | 0x66, 0x90 /* xchg %ax,%ax */ | |
0ff2b86e L |
659 | }; |
660 | ||
38b12349 L |
661 | /* Entries for branches with BND prefix in the non-lazey procedure |
662 | linkage table look like this. */ | |
0ff2b86e | 663 | |
38b12349 | 664 | static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 665 | { |
07d6d2b8 AM |
666 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ |
667 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
668 | 0x90 /* nop */ | |
0ff2b86e L |
669 | }; |
670 | ||
ee2fdd6f L |
671 | /* Entries for branches with IBT-enabled in the non-lazey procedure |
672 | linkage table look like this. They have the same size as the lazy | |
673 | PLT entry. */ | |
674 | ||
675 | static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
676 | { | |
07d6d2b8 AM |
677 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
678 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ | |
ee2fdd6f | 679 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
07d6d2b8 | 680 | 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */ |
ee2fdd6f L |
681 | }; |
682 | ||
683 | /* Entries for branches with IBT-enabled in the x32 non-lazey procedure | |
684 | linkage table look like this. They have the same size as the lazy | |
685 | PLT entry. */ | |
686 | ||
687 | static const bfd_byte elf_x32_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
688 | { | |
07d6d2b8 AM |
689 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
690 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ | |
ee2fdd6f L |
691 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
692 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
693 | }; | |
694 | ||
92e68c1d L |
695 | /* The TLSDESC entry in a lazy procedure linkage table. */ |
696 | static const bfd_byte elf_x86_64_tlsdesc_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
697 | { | |
698 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
699 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
700 | 0xff, 0x25, 16, 0, 0, 0 /* jmpq *GOT+TDG(%rip) */ | |
701 | }; | |
702 | ||
38b12349 | 703 | /* .eh_frame covering the lazy .plt section. */ |
e41b3a13 | 704 | |
38b12349 | 705 | static const bfd_byte elf_x86_64_eh_frame_lazy_plt[] = |
e41b3a13 | 706 | { |
e41b3a13 JJ |
707 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ |
708 | 0, 0, 0, 0, /* CIE ID */ | |
709 | 1, /* CIE version */ | |
710 | 'z', 'R', 0, /* Augmentation string */ | |
711 | 1, /* Code alignment factor */ | |
712 | 0x78, /* Data alignment factor */ | |
713 | 16, /* Return address column */ | |
714 | 1, /* Augmentation size */ | |
715 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
716 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
717 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
718 | DW_CFA_nop, DW_CFA_nop, | |
719 | ||
720 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
721 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
722 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
723 | 0, 0, 0, 0, /* .plt size goes here */ | |
724 | 0, /* Augmentation size */ | |
725 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
726 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
727 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
728 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
729 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
730 | 11, /* Block length */ | |
731 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
732 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
733 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
734 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
735 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
736 | }; | |
737 | ||
38b12349 | 738 | /* .eh_frame covering the lazy BND .plt section. */ |
9e659176 | 739 | |
38b12349 | 740 | static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt[] = |
9e659176 L |
741 | { |
742 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
743 | 0, 0, 0, 0, /* CIE ID */ | |
744 | 1, /* CIE version */ | |
745 | 'z', 'R', 0, /* Augmentation string */ | |
746 | 1, /* Code alignment factor */ | |
747 | 0x78, /* Data alignment factor */ | |
748 | 16, /* Return address column */ | |
749 | 1, /* Augmentation size */ | |
750 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
751 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
752 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
753 | DW_CFA_nop, DW_CFA_nop, | |
754 | ||
755 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
756 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
757 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
758 | 0, 0, 0, 0, /* .plt size goes here */ | |
759 | 0, /* Augmentation size */ | |
760 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
761 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
762 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
763 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
764 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
765 | 11, /* Block length */ | |
766 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
767 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
768 | DW_OP_lit15, DW_OP_and, DW_OP_lit5, DW_OP_ge, | |
769 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
770 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
771 | }; | |
772 | ||
ee2fdd6f L |
773 | /* .eh_frame covering the lazy .plt section with IBT-enabled. */ |
774 | ||
775 | static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt[] = | |
776 | { | |
777 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
778 | 0, 0, 0, 0, /* CIE ID */ | |
779 | 1, /* CIE version */ | |
780 | 'z', 'R', 0, /* Augmentation string */ | |
781 | 1, /* Code alignment factor */ | |
782 | 0x78, /* Data alignment factor */ | |
783 | 16, /* Return address column */ | |
784 | 1, /* Augmentation size */ | |
785 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
786 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
787 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
788 | DW_CFA_nop, DW_CFA_nop, | |
789 | ||
790 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
791 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
792 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
793 | 0, 0, 0, 0, /* .plt size goes here */ | |
794 | 0, /* Augmentation size */ | |
795 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
796 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
797 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
798 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
799 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
800 | 11, /* Block length */ | |
801 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
802 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
803 | DW_OP_lit15, DW_OP_and, DW_OP_lit10, DW_OP_ge, | |
804 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
805 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
806 | }; | |
807 | ||
808 | /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */ | |
809 | ||
810 | static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt[] = | |
811 | { | |
812 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
813 | 0, 0, 0, 0, /* CIE ID */ | |
814 | 1, /* CIE version */ | |
815 | 'z', 'R', 0, /* Augmentation string */ | |
816 | 1, /* Code alignment factor */ | |
817 | 0x78, /* Data alignment factor */ | |
818 | 16, /* Return address column */ | |
819 | 1, /* Augmentation size */ | |
820 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
821 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
822 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
823 | DW_CFA_nop, DW_CFA_nop, | |
824 | ||
825 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
826 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
827 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
828 | 0, 0, 0, 0, /* .plt size goes here */ | |
829 | 0, /* Augmentation size */ | |
830 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
831 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
832 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
833 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
834 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
835 | 11, /* Block length */ | |
836 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
837 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
838 | DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge, | |
839 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
840 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
841 | }; | |
842 | ||
38b12349 | 843 | /* .eh_frame covering the non-lazy .plt section. */ |
fff53dae | 844 | |
38b12349 | 845 | static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt[] = |
fff53dae L |
846 | { |
847 | #define PLT_GOT_FDE_LENGTH 20 | |
848 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
849 | 0, 0, 0, 0, /* CIE ID */ | |
850 | 1, /* CIE version */ | |
851 | 'z', 'R', 0, /* Augmentation string */ | |
852 | 1, /* Code alignment factor */ | |
853 | 0x78, /* Data alignment factor */ | |
854 | 16, /* Return address column */ | |
855 | 1, /* Augmentation size */ | |
856 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
857 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
858 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
859 | DW_CFA_nop, DW_CFA_nop, | |
860 | ||
861 | PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
862 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
38b12349 L |
863 | 0, 0, 0, 0, /* the start of non-lazy .plt goes here */ |
864 | 0, 0, 0, 0, /* non-lazy .plt size goes here */ | |
fff53dae L |
865 | 0, /* Augmentation size */ |
866 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, | |
867 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
868 | }; | |
869 | ||
cf0e0a0b IB |
870 | static const sframe_frame_row_entry elf_x86_64_sframe_null_fre = |
871 | { | |
872 | 0, | |
8c078abd IB |
873 | {16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* 12 bytes. */ |
874 | SFRAME_V1_FRE_INFO (SFRAME_BASE_REG_SP, 1, SFRAME_FRE_OFFSET_1B) /* FRE info. */ | |
cf0e0a0b IB |
875 | }; |
876 | ||
877 | /* .sframe FRE covering the .plt section entry. */ | |
878 | static const sframe_frame_row_entry elf_x86_64_sframe_plt0_fre1 = | |
879 | { | |
880 | 0, /* SFrame FRE start address. */ | |
8c078abd IB |
881 | {16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* 12 bytes. */ |
882 | SFRAME_V1_FRE_INFO (SFRAME_BASE_REG_SP, 1, SFRAME_FRE_OFFSET_1B) /* FRE info. */ | |
cf0e0a0b IB |
883 | }; |
884 | ||
885 | /* .sframe FRE covering the .plt section entry. */ | |
886 | static const sframe_frame_row_entry elf_x86_64_sframe_plt0_fre2 = | |
887 | { | |
888 | 6, /* SFrame FRE start address. */ | |
8c078abd IB |
889 | {24, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* 12 bytes. */ |
890 | SFRAME_V1_FRE_INFO (SFRAME_BASE_REG_SP, 1, SFRAME_FRE_OFFSET_1B) /* FRE info. */ | |
cf0e0a0b IB |
891 | }; |
892 | ||
893 | /* .sframe FRE covering the .plt section entry. */ | |
894 | static const sframe_frame_row_entry elf_x86_64_sframe_pltn_fre1 = | |
895 | { | |
896 | 0, /* SFrame FRE start address. */ | |
8c078abd IB |
897 | {8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* 12 bytes. */ |
898 | SFRAME_V1_FRE_INFO (SFRAME_BASE_REG_SP, 1, SFRAME_FRE_OFFSET_1B) /* FRE info. */ | |
cf0e0a0b IB |
899 | }; |
900 | ||
901 | /* .sframe FRE covering the .plt section entry. */ | |
902 | static const sframe_frame_row_entry elf_x86_64_sframe_pltn_fre2 = | |
903 | { | |
904 | 11, /* SFrame FRE start address. */ | |
8c078abd IB |
905 | {16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* 12 bytes. */ |
906 | SFRAME_V1_FRE_INFO (SFRAME_BASE_REG_SP, 1, SFRAME_FRE_OFFSET_1B) /* FRE info. */ | |
cf0e0a0b IB |
907 | }; |
908 | ||
909 | /* .sframe FRE covering the second .plt section entry. */ | |
910 | static const sframe_frame_row_entry elf_x86_64_sframe_sec_pltn_fre1 = | |
911 | { | |
912 | 0, /* SFrame FRE start address. */ | |
8c078abd IB |
913 | {8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* 12 bytes. */ |
914 | SFRAME_V1_FRE_INFO (SFRAME_BASE_REG_SP, 1, SFRAME_FRE_OFFSET_1B) /* FRE info. */ | |
cf0e0a0b IB |
915 | }; |
916 | ||
917 | /* SFrame helper object for non-lazy PLT. Also used for IBT enabled PLT. */ | |
918 | static const struct elf_x86_sframe_plt elf_x86_64_sframe_non_lazy_plt = | |
919 | { | |
920 | LAZY_PLT_ENTRY_SIZE, | |
921 | 2, /* Number of FREs for PLT0. */ | |
922 | /* Array of SFrame FREs for plt0. */ | |
923 | { &elf_x86_64_sframe_plt0_fre1, &elf_x86_64_sframe_plt0_fre2 }, | |
924 | LAZY_PLT_ENTRY_SIZE, | |
925 | 1, /* Number of FREs for PLTn. */ | |
926 | /* Array of SFrame FREs for plt. */ | |
927 | { &elf_x86_64_sframe_sec_pltn_fre1, &elf_x86_64_sframe_null_fre }, | |
928 | 0, | |
929 | 0, /* There is no second PLT necessary. */ | |
930 | { &elf_x86_64_sframe_null_fre } | |
931 | }; | |
932 | ||
933 | /* SFrame helper object for lazy PLT. Also used for IBT enabled PLT. */ | |
934 | static const struct elf_x86_sframe_plt elf_x86_64_sframe_plt = | |
935 | { | |
936 | LAZY_PLT_ENTRY_SIZE, | |
937 | 2, /* Number of FREs for PLT0. */ | |
938 | /* Array of SFrame FREs for plt0. */ | |
939 | { &elf_x86_64_sframe_plt0_fre1, &elf_x86_64_sframe_plt0_fre2 }, | |
940 | LAZY_PLT_ENTRY_SIZE, | |
941 | 2, /* Number of FREs for PLTn. */ | |
942 | /* Array of SFrame FREs for plt. */ | |
943 | { &elf_x86_64_sframe_pltn_fre1, &elf_x86_64_sframe_pltn_fre2 }, | |
944 | NON_LAZY_PLT_ENTRY_SIZE, | |
945 | 1, /* Number of FREs for PLTn for second PLT. */ | |
53d8d3f0 | 946 | /* FREs for second plt (stack trace info for .plt.got is |
cf0e0a0b IB |
947 | identical). Used when IBT or non-lazy PLT is in effect. */ |
948 | { &elf_x86_64_sframe_sec_pltn_fre1 } | |
949 | }; | |
950 | ||
eed180f8 | 951 | /* These are the standard parameters. */ |
765e526c | 952 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt = |
eed180f8 | 953 | { |
07d6d2b8 AM |
954 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ |
955 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
956 | elf_x86_64_lazy_plt_entry, /* plt_entry */ | |
957 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
958 | elf_x86_64_tlsdesc_plt_entry, /* plt_tlsdesc_entry */ |
959 | LAZY_PLT_ENTRY_SIZE, /* plt_tlsdesc_entry_size */ | |
960 | 6, /* plt_tlsdesc_got1_offset */ | |
961 | 12, /* plt_tlsdesc_got2_offset */ | |
962 | 10, /* plt_tlsdesc_got1_insn_end */ | |
963 | 16, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
964 | 2, /* plt0_got1_offset */ |
965 | 8, /* plt0_got2_offset */ | |
966 | 12, /* plt0_got2_insn_end */ | |
967 | 2, /* plt_got_offset */ | |
968 | 7, /* plt_reloc_offset */ | |
969 | 12, /* plt_plt_offset */ | |
970 | 6, /* plt_got_insn_size */ | |
971 | LAZY_PLT_ENTRY_SIZE, /* plt_plt_insn_end */ | |
972 | 6, /* plt_lazy_offset */ | |
973 | elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */ | |
974 | elf_x86_64_lazy_plt_entry, /* pic_plt_entry */ | |
975 | elf_x86_64_eh_frame_lazy_plt, /* eh_frame_plt */ | |
38b12349 L |
976 | sizeof (elf_x86_64_eh_frame_lazy_plt) /* eh_frame_plt_size */ |
977 | }; | |
978 | ||
765e526c | 979 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_plt = |
38b12349 | 980 | { |
07d6d2b8 AM |
981 | elf_x86_64_non_lazy_plt_entry, /* plt_entry */ |
982 | elf_x86_64_non_lazy_plt_entry, /* pic_plt_entry */ | |
983 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
984 | 2, /* plt_got_offset */ | |
985 | 6, /* plt_got_insn_size */ | |
986 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
38b12349 | 987 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
eed180f8 RM |
988 | }; |
989 | ||
765e526c | 990 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_bnd_plt = |
0ff2b86e | 991 | { |
07d6d2b8 AM |
992 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ |
993 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
994 | elf_x86_64_lazy_bnd_plt_entry, /* plt_entry */ | |
995 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
996 | elf_x86_64_tlsdesc_plt_entry, /* plt_tlsdesc_entry */ |
997 | LAZY_PLT_ENTRY_SIZE, /* plt_tlsdesc_entry_size */ | |
998 | 6, /* plt_tlsdesc_got1_offset */ | |
999 | 12, /* plt_tlsdesc_got2_offset */ | |
1000 | 10, /* plt_tlsdesc_got1_insn_end */ | |
1001 | 16, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
1002 | 2, /* plt0_got1_offset */ |
1003 | 1+8, /* plt0_got2_offset */ | |
1004 | 1+12, /* plt0_got2_insn_end */ | |
1005 | 1+2, /* plt_got_offset */ | |
1006 | 1, /* plt_reloc_offset */ | |
1007 | 7, /* plt_plt_offset */ | |
1008 | 1+6, /* plt_got_insn_size */ | |
1009 | 11, /* plt_plt_insn_end */ | |
1010 | 0, /* plt_lazy_offset */ | |
1011 | elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */ | |
1012 | elf_x86_64_lazy_bnd_plt_entry, /* pic_plt_entry */ | |
1013 | elf_x86_64_eh_frame_lazy_bnd_plt, /* eh_frame_plt */ | |
38b12349 L |
1014 | sizeof (elf_x86_64_eh_frame_lazy_bnd_plt) /* eh_frame_plt_size */ |
1015 | }; | |
1016 | ||
765e526c | 1017 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt = |
38b12349 | 1018 | { |
07d6d2b8 AM |
1019 | elf_x86_64_non_lazy_bnd_plt_entry, /* plt_entry */ |
1020 | elf_x86_64_non_lazy_bnd_plt_entry, /* pic_plt_entry */ | |
1021 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
1022 | 1+2, /* plt_got_offset */ | |
1023 | 1+6, /* plt_got_insn_size */ | |
1024 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
38b12349 L |
1025 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
1026 | }; | |
1027 | ||
765e526c | 1028 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt = |
ee2fdd6f | 1029 | { |
07d6d2b8 AM |
1030 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ |
1031 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
1032 | elf_x86_64_lazy_ibt_plt_entry, /* plt_entry */ | |
1033 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
1034 | elf_x86_64_tlsdesc_plt_entry, /* plt_tlsdesc_entry */ |
1035 | LAZY_PLT_ENTRY_SIZE, /* plt_tlsdesc_entry_size */ | |
1036 | 6, /* plt_tlsdesc_got1_offset */ | |
1037 | 12, /* plt_tlsdesc_got2_offset */ | |
1038 | 10, /* plt_tlsdesc_got1_insn_end */ | |
1039 | 16, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
1040 | 2, /* plt0_got1_offset */ |
1041 | 1+8, /* plt0_got2_offset */ | |
1042 | 1+12, /* plt0_got2_insn_end */ | |
1043 | 4+1+2, /* plt_got_offset */ | |
1044 | 4+1, /* plt_reloc_offset */ | |
1045 | 4+1+6, /* plt_plt_offset */ | |
1046 | 4+1+6, /* plt_got_insn_size */ | |
1047 | 4+1+5+5, /* plt_plt_insn_end */ | |
1048 | 0, /* plt_lazy_offset */ | |
1049 | elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */ | |
1050 | elf_x86_64_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
1051 | elf_x86_64_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
1052 | sizeof (elf_x86_64_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ |
1053 | }; | |
1054 | ||
765e526c | 1055 | static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt = |
ee2fdd6f | 1056 | { |
07d6d2b8 AM |
1057 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ |
1058 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
1059 | elf_x32_lazy_ibt_plt_entry, /* plt_entry */ | |
1060 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
1061 | elf_x86_64_tlsdesc_plt_entry, /* plt_tlsdesc_entry */ |
1062 | LAZY_PLT_ENTRY_SIZE, /* plt_tlsdesc_entry_size */ | |
1063 | 6, /* plt_tlsdesc_got1_offset */ | |
1064 | 12, /* plt_tlsdesc_got2_offset */ | |
1065 | 10, /* plt_tlsdesc_got1_insn_end */ | |
1066 | 16, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
1067 | 2, /* plt0_got1_offset */ |
1068 | 8, /* plt0_got2_offset */ | |
1069 | 12, /* plt0_got2_insn_end */ | |
1070 | 4+2, /* plt_got_offset */ | |
1071 | 4+1, /* plt_reloc_offset */ | |
1072 | 4+6, /* plt_plt_offset */ | |
1073 | 4+6, /* plt_got_insn_size */ | |
1074 | 4+5+5, /* plt_plt_insn_end */ | |
1075 | 0, /* plt_lazy_offset */ | |
1076 | elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */ | |
1077 | elf_x32_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
1078 | elf_x32_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
1079 | sizeof (elf_x32_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ |
1080 | }; | |
1081 | ||
765e526c | 1082 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt = |
ee2fdd6f | 1083 | { |
07d6d2b8 AM |
1084 | elf_x86_64_non_lazy_ibt_plt_entry, /* plt_entry */ |
1085 | elf_x86_64_non_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
1086 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
1087 | 4+1+2, /* plt_got_offset */ | |
1088 | 4+1+6, /* plt_got_insn_size */ | |
1089 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
1090 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
1091 | }; | |
1092 | ||
765e526c | 1093 | static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt = |
ee2fdd6f | 1094 | { |
07d6d2b8 AM |
1095 | elf_x32_non_lazy_ibt_plt_entry, /* plt_entry */ |
1096 | elf_x32_non_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
1097 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
1098 | 4+2, /* plt_got_offset */ | |
1099 | 4+6, /* plt_got_insn_size */ | |
1100 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
1101 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
1102 | }; | |
1103 | ||
0a1b45a2 | 1104 | static bool |
27482721 | 1105 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 1106 | { |
8d88c4ca NC |
1107 | /* Set the right machine number for an x86-64 elf64 file. */ |
1108 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
0a1b45a2 | 1109 | return true; |
8d88c4ca NC |
1110 | } |
1111 | ||
0a1b45a2 | 1112 | static bool |
8059fb19 RM |
1113 | elf32_x86_64_elf_object_p (bfd *abfd) |
1114 | { | |
1115 | /* Set the right machine number for an x86-64 elf32 file. */ | |
1116 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
0a1b45a2 | 1117 | return true; |
8059fb19 RM |
1118 | } |
1119 | ||
142411ca L |
1120 | /* Return TRUE if the TLS access code sequence support transition |
1121 | from R_TYPE. */ | |
1122 | ||
0a1b45a2 | 1123 | static bool |
351f65ca L |
1124 | elf_x86_64_check_tls_transition (bfd *abfd, |
1125 | struct bfd_link_info *info, | |
1126 | asection *sec, | |
1127 | bfd_byte *contents, | |
1128 | Elf_Internal_Shdr *symtab_hdr, | |
1129 | struct elf_link_hash_entry **sym_hashes, | |
1130 | unsigned int r_type, | |
1131 | const Elf_Internal_Rela *rel, | |
1132 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1133 | { |
142411ca L |
1134 | unsigned int val; |
1135 | unsigned long r_symndx; | |
0a1b45a2 | 1136 | bool largepic = false; |
142411ca L |
1137 | struct elf_link_hash_entry *h; |
1138 | bfd_vma offset; | |
0afcef53 | 1139 | struct elf_x86_link_hash_table *htab; |
e2cbcd91 | 1140 | bfd_byte *call; |
0a1b45a2 | 1141 | bool indirect_call; |
142411ca | 1142 | |
0afcef53 | 1143 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
142411ca | 1144 | offset = rel->r_offset; |
bffbf940 | 1145 | switch (r_type) |
142411ca L |
1146 | { |
1147 | case R_X86_64_TLSGD: | |
1148 | case R_X86_64_TLSLD: | |
1149 | if ((rel + 1) >= relend) | |
0a1b45a2 | 1150 | return false; |
142411ca L |
1151 | |
1152 | if (r_type == R_X86_64_TLSGD) | |
1153 | { | |
52bc799a | 1154 | /* Check transition from GD access model. For 64bit, only |
142411ca | 1155 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
e2cbcd91 L |
1156 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1157 | or | |
1158 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
1159 | .byte 0x66; rex64 | |
1160 | call *__tls_get_addr@GOTPCREL(%rip) | |
1161 | which may be converted to | |
1162 | addr32 call __tls_get_addr | |
52bc799a L |
1163 | can transit to different access model. For 32bit, only |
1164 | leaq foo@tlsgd(%rip), %rdi | |
e2cbcd91 L |
1165 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1166 | or | |
1167 | leaq foo@tlsgd(%rip), %rdi | |
1168 | .byte 0x66; rex64 | |
1169 | call *__tls_get_addr@GOTPCREL(%rip) | |
1170 | which may be converted to | |
1171 | addr32 call __tls_get_addr | |
1172 | can transit to different access model. For largepic, | |
5c98a14e | 1173 | we also support: |
07d6d2b8 AM |
1174 | leaq foo@tlsgd(%rip), %rdi |
1175 | movabsq $__tls_get_addr@pltoff, %rax | |
1176 | addq $r15, %rax | |
1177 | call *%rax | |
e2cbcd91 | 1178 | or |
07d6d2b8 AM |
1179 | leaq foo@tlsgd(%rip), %rdi |
1180 | movabsq $__tls_get_addr@pltoff, %rax | |
1181 | addq $rbx, %rax | |
1182 | call *%rax */ | |
142411ca | 1183 | |
fa289a5f AM |
1184 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; |
1185 | ||
5c98a14e | 1186 | if ((offset + 12) > sec->size) |
0a1b45a2 | 1187 | return false; |
52bc799a | 1188 | |
e2cbcd91 L |
1189 | call = contents + offset + 4; |
1190 | if (call[0] != 0x66 | |
1191 | || !((call[1] == 0x48 | |
1192 | && call[2] == 0xff | |
1193 | && call[3] == 0x15) | |
1194 | || (call[1] == 0x48 | |
1195 | && call[2] == 0x67 | |
1196 | && call[3] == 0xe8) | |
1197 | || (call[1] == 0x66 | |
1198 | && call[2] == 0x48 | |
1199 | && call[3] == 0xe8))) | |
5c98a14e JJ |
1200 | { |
1201 | if (!ABI_64_P (abfd) | |
1202 | || (offset + 19) > sec->size | |
1203 | || offset < 3 | |
e2cbcd91 L |
1204 | || memcmp (call - 7, leaq + 1, 3) != 0 |
1205 | || memcmp (call, "\x48\xb8", 2) != 0 | |
1206 | || call[11] != 0x01 | |
1207 | || call[13] != 0xff | |
1208 | || call[14] != 0xd0 | |
1209 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1210 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
0a1b45a2 AM |
1211 | return false; |
1212 | largepic = true; | |
5c98a14e JJ |
1213 | } |
1214 | else if (ABI_64_P (abfd)) | |
52bc799a | 1215 | { |
52bc799a | 1216 | if (offset < 4 |
fa289a5f | 1217 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
0a1b45a2 | 1218 | return false; |
52bc799a L |
1219 | } |
1220 | else | |
1221 | { | |
52bc799a | 1222 | if (offset < 3 |
fa289a5f | 1223 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
0a1b45a2 | 1224 | return false; |
52bc799a | 1225 | } |
e2cbcd91 | 1226 | indirect_call = call[2] == 0xff; |
142411ca L |
1227 | } |
1228 | else | |
1229 | { | |
1230 | /* Check transition from LD access model. Only | |
1231 | leaq foo@tlsld(%rip), %rdi; | |
e2cbcd91 | 1232 | call __tls_get_addr@PLT |
07d6d2b8 | 1233 | or |
e2cbcd91 L |
1234 | leaq foo@tlsld(%rip), %rdi; |
1235 | call *__tls_get_addr@GOTPCREL(%rip) | |
1236 | which may be converted to | |
1237 | addr32 call __tls_get_addr | |
5c98a14e JJ |
1238 | can transit to different access model. For largepic |
1239 | we also support: | |
07d6d2b8 AM |
1240 | leaq foo@tlsld(%rip), %rdi |
1241 | movabsq $__tls_get_addr@pltoff, %rax | |
1242 | addq $r15, %rax | |
1243 | call *%rax | |
e2cbcd91 | 1244 | or |
07d6d2b8 AM |
1245 | leaq foo@tlsld(%rip), %rdi |
1246 | movabsq $__tls_get_addr@pltoff, %rax | |
1247 | addq $rbx, %rax | |
1248 | call *%rax */ | |
142411ca | 1249 | |
fa289a5f | 1250 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1251 | |
1252 | if (offset < 3 || (offset + 9) > sec->size) | |
0a1b45a2 | 1253 | return false; |
142411ca | 1254 | |
5c98a14e | 1255 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
0a1b45a2 | 1256 | return false; |
5c98a14e | 1257 | |
e2cbcd91 L |
1258 | call = contents + offset + 4; |
1259 | if (!(call[0] == 0xe8 | |
1260 | || (call[0] == 0xff && call[1] == 0x15) | |
1261 | || (call[0] == 0x67 && call[1] == 0xe8))) | |
5c98a14e JJ |
1262 | { |
1263 | if (!ABI_64_P (abfd) | |
1264 | || (offset + 19) > sec->size | |
e2cbcd91 L |
1265 | || memcmp (call, "\x48\xb8", 2) != 0 |
1266 | || call[11] != 0x01 | |
1267 | || call[13] != 0xff | |
1268 | || call[14] != 0xd0 | |
1269 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1270 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
0a1b45a2 AM |
1271 | return false; |
1272 | largepic = true; | |
5c98a14e | 1273 | } |
e2cbcd91 | 1274 | indirect_call = call[0] == 0xff; |
142411ca L |
1275 | } |
1276 | ||
351f65ca | 1277 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca | 1278 | if (r_symndx < symtab_hdr->sh_info) |
0a1b45a2 | 1279 | return false; |
142411ca L |
1280 | |
1281 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1d4af308 | 1282 | if (h == NULL |
0afcef53 | 1283 | || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr) |
0a1b45a2 | 1284 | return false; |
e2cbcd91 | 1285 | else |
78984959 L |
1286 | { |
1287 | r_type = (ELF32_R_TYPE (rel[1].r_info) | |
1288 | & ~R_X86_64_converted_reloc_bit); | |
1289 | if (largepic) | |
1290 | return r_type == R_X86_64_PLTOFF64; | |
1291 | else if (indirect_call) | |
d58854b6 | 1292 | return (r_type == R_X86_64_GOTPCRELX || r_type == R_X86_64_GOTPCREL); |
78984959 L |
1293 | else |
1294 | return (r_type == R_X86_64_PC32 || r_type == R_X86_64_PLT32); | |
1295 | } | |
142411ca | 1296 | |
a533c8df L |
1297 | case R_X86_64_CODE_4_GOTTPOFF: |
1298 | /* Check transition from IE access model: | |
1299 | mov foo@gottpoff(%rip), %reg | |
1300 | add foo@gottpoff(%rip), %reg | |
1301 | where reg is one of r16 to r31. */ | |
1302 | ||
1303 | if (offset < 4 | |
1304 | || (offset + 4) > sec->size | |
1305 | || contents[offset - 4] != 0xd5) | |
1306 | return false; | |
1307 | ||
1308 | goto check_gottpoff; | |
1309 | ||
5bc71c2a L |
1310 | case R_X86_64_CODE_6_GOTTPOFF: |
1311 | /* Check transition from IE access model: | |
1312 | add %reg1, foo@gottpoff(%rip), %reg2 | |
1313 | where reg1/reg2 are one of r16 to r31. */ | |
1314 | ||
1315 | if (offset < 6 | |
1316 | || (offset + 4) > sec->size | |
1317 | || contents[offset - 6] != 0x62) | |
1318 | return false; | |
1319 | ||
1320 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1321 | if (val != 0x01 && val != 0x03) | |
1322 | return false; | |
1323 | ||
1324 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1325 | return (val & 0xc7) == 5; | |
1326 | ||
142411ca L |
1327 | case R_X86_64_GOTTPOFF: |
1328 | /* Check transition from IE access model: | |
4a4c5f25 L |
1329 | mov foo@gottpoff(%rip), %reg |
1330 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1331 | */ |
1332 | ||
4a4c5f25 L |
1333 | /* Check REX prefix first. */ |
1334 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1335 | { | |
1336 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1337 | if (val != 0x48 && val != 0x4c) | |
1338 | { | |
1339 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1340 | if (ABI_64_P (abfd)) | |
0a1b45a2 | 1341 | return false; |
4a4c5f25 L |
1342 | } |
1343 | } | |
1344 | else | |
1345 | { | |
1346 | /* X32 may not have any REX prefix. */ | |
1347 | if (ABI_64_P (abfd)) | |
0a1b45a2 | 1348 | return false; |
4a4c5f25 | 1349 | if (offset < 2 || (offset + 3) > sec->size) |
0a1b45a2 | 1350 | return false; |
4a4c5f25 | 1351 | } |
142411ca | 1352 | |
a533c8df | 1353 | check_gottpoff: |
142411ca L |
1354 | val = bfd_get_8 (abfd, contents + offset - 2); |
1355 | if (val != 0x8b && val != 0x03) | |
0a1b45a2 | 1356 | return false; |
142411ca L |
1357 | |
1358 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1359 | return (val & 0xc7) == 5; | |
1360 | ||
a533c8df L |
1361 | case R_X86_64_CODE_4_GOTPC32_TLSDESC: |
1362 | /* Check transition from GDesc access model: | |
1363 | lea x@tlsdesc(%rip), %reg | |
1364 | where reg is one of r16 to r31. */ | |
1365 | ||
1366 | if (offset < 4 | |
1367 | || (offset + 4) > sec->size | |
1368 | || contents[offset - 4] != 0xd5) | |
1369 | return false; | |
1370 | ||
1371 | goto check_tlsdesc; | |
1372 | ||
142411ca L |
1373 | case R_X86_64_GOTPC32_TLSDESC: |
1374 | /* Check transition from GDesc access model: | |
14470f07 L |
1375 | leaq x@tlsdesc(%rip), %rax <--- LP64 mode. |
1376 | rex leal x@tlsdesc(%rip), %eax <--- X32 mode. | |
142411ca L |
1377 | |
1378 | Make sure it's a leaq adding rip to a 32-bit offset | |
1379 | into any register, although it's probably almost always | |
1380 | going to be rax. */ | |
1381 | ||
1382 | if (offset < 3 || (offset + 4) > sec->size) | |
0a1b45a2 | 1383 | return false; |
142411ca L |
1384 | |
1385 | val = bfd_get_8 (abfd, contents + offset - 3); | |
14470f07 L |
1386 | val &= 0xfb; |
1387 | if (val != 0x48 && (ABI_64_P (abfd) || val != 0x40)) | |
0a1b45a2 | 1388 | return false; |
142411ca | 1389 | |
a533c8df | 1390 | check_tlsdesc: |
142411ca | 1391 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) |
0a1b45a2 | 1392 | return false; |
142411ca L |
1393 | |
1394 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1395 | return (val & 0xc7) == 0x05; | |
1396 | ||
1397 | case R_X86_64_TLSDESC_CALL: | |
1398 | /* Check transition from GDesc access model: | |
14470f07 L |
1399 | call *x@tlsdesc(%rax) <--- LP64 mode. |
1400 | call *x@tlsdesc(%eax) <--- X32 mode. | |
142411ca L |
1401 | */ |
1402 | if (offset + 2 <= sec->size) | |
1403 | { | |
14470f07 | 1404 | unsigned int prefix; |
e2cbcd91 | 1405 | call = contents + offset; |
14470f07 L |
1406 | prefix = 0; |
1407 | if (!ABI_64_P (abfd)) | |
1408 | { | |
1409 | /* Check for call *x@tlsdesc(%eax). */ | |
1410 | if (call[0] == 0x67) | |
1411 | { | |
1412 | prefix = 1; | |
1413 | if (offset + 3 > sec->size) | |
0a1b45a2 | 1414 | return false; |
14470f07 L |
1415 | } |
1416 | } | |
1417 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
1418 | return call[prefix] == 0xff && call[1 + prefix] == 0x10; | |
142411ca L |
1419 | } |
1420 | ||
0a1b45a2 | 1421 | return false; |
142411ca L |
1422 | |
1423 | default: | |
1424 | abort (); | |
1425 | } | |
1426 | } | |
1427 | ||
1428 | /* Return TRUE if the TLS access transition is OK or no transition | |
1429 | will be performed. Update R_TYPE if there is a transition. */ | |
1430 | ||
0a1b45a2 | 1431 | static bool |
351f65ca L |
1432 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1433 | asection *sec, bfd_byte *contents, | |
1434 | Elf_Internal_Shdr *symtab_hdr, | |
1435 | struct elf_link_hash_entry **sym_hashes, | |
1436 | unsigned int *r_type, int tls_type, | |
1437 | const Elf_Internal_Rela *rel, | |
1438 | const Elf_Internal_Rela *relend, | |
1439 | struct elf_link_hash_entry *h, | |
bedfd056 | 1440 | unsigned long r_symndx, |
0a1b45a2 | 1441 | bool from_relocate_section) |
142411ca L |
1442 | { |
1443 | unsigned int from_type = *r_type; | |
1444 | unsigned int to_type = from_type; | |
0a1b45a2 | 1445 | bool check = true; |
142411ca | 1446 | |
bb1cb422 L |
1447 | /* Skip TLS transition for functions. */ |
1448 | if (h != NULL | |
1449 | && (h->type == STT_FUNC | |
1450 | || h->type == STT_GNU_IFUNC)) | |
0a1b45a2 | 1451 | return true; |
bb1cb422 | 1452 | |
142411ca | 1453 | switch (from_type) |
bffbf940 JJ |
1454 | { |
1455 | case R_X86_64_TLSGD: | |
67a4f2b7 | 1456 | case R_X86_64_GOTPC32_TLSDESC: |
a533c8df | 1457 | case R_X86_64_CODE_4_GOTPC32_TLSDESC: |
67a4f2b7 | 1458 | case R_X86_64_TLSDESC_CALL: |
bffbf940 | 1459 | case R_X86_64_GOTTPOFF: |
a533c8df | 1460 | case R_X86_64_CODE_4_GOTTPOFF: |
5bc71c2a | 1461 | case R_X86_64_CODE_6_GOTTPOFF: |
0e1862bb | 1462 | if (bfd_link_executable (info)) |
142411ca L |
1463 | { |
1464 | if (h == NULL) | |
1465 | to_type = R_X86_64_TPOFF32; | |
1466 | else | |
1467 | to_type = R_X86_64_GOTTPOFF; | |
1468 | } | |
1469 | ||
bedfd056 L |
1470 | /* When we are called from elf_x86_64_relocate_section, there may |
1471 | be additional transitions based on TLS_TYPE. */ | |
1472 | if (from_relocate_section) | |
142411ca L |
1473 | { |
1474 | unsigned int new_to_type = to_type; | |
1475 | ||
51537393 | 1476 | if (TLS_TRANSITION_IE_TO_LE_P (info, h, tls_type)) |
142411ca L |
1477 | new_to_type = R_X86_64_TPOFF32; |
1478 | ||
1479 | if (to_type == R_X86_64_TLSGD | |
1480 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
a533c8df | 1481 | || to_type == R_X86_64_CODE_4_GOTPC32_TLSDESC |
142411ca L |
1482 | || to_type == R_X86_64_TLSDESC_CALL) |
1483 | { | |
1484 | if (tls_type == GOT_TLS_IE) | |
1485 | new_to_type = R_X86_64_GOTTPOFF; | |
1486 | } | |
1487 | ||
1488 | /* We checked the transition before when we were called from | |
3747999c | 1489 | elf_x86_64_scan_relocs. We only want to check the new |
142411ca L |
1490 | transition which hasn't been checked before. */ |
1491 | check = new_to_type != to_type && from_type == to_type; | |
1492 | to_type = new_to_type; | |
1493 | } | |
1494 | ||
1495 | break; | |
1496 | ||
bffbf940 | 1497 | case R_X86_64_TLSLD: |
0e1862bb | 1498 | if (bfd_link_executable (info)) |
142411ca L |
1499 | to_type = R_X86_64_TPOFF32; |
1500 | break; | |
1501 | ||
1502 | default: | |
0a1b45a2 | 1503 | return true; |
bffbf940 JJ |
1504 | } |
1505 | ||
142411ca | 1506 | /* Return TRUE if there is no transition. */ |
a533c8df L |
1507 | if (from_type == to_type |
1508 | || (from_type == R_X86_64_CODE_4_GOTTPOFF | |
5bc71c2a L |
1509 | && to_type == R_X86_64_GOTTPOFF) |
1510 | || (from_type == R_X86_64_CODE_6_GOTTPOFF | |
a533c8df | 1511 | && to_type == R_X86_64_GOTTPOFF)) |
0a1b45a2 | 1512 | return true; |
142411ca L |
1513 | |
1514 | /* Check if the transition can be performed. */ | |
1515 | if (check | |
351f65ca L |
1516 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1517 | symtab_hdr, sym_hashes, | |
1518 | from_type, rel, relend)) | |
142411ca | 1519 | { |
2f629d23 | 1520 | reloc_howto_type *from, *to; |
4c544807 | 1521 | const char *name; |
142411ca | 1522 | |
351f65ca L |
1523 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1524 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1525 | |
f3185997 | 1526 | if (from == NULL || to == NULL) |
0a1b45a2 | 1527 | return false; |
f3185997 | 1528 | |
4c544807 L |
1529 | if (h) |
1530 | name = h->root.root.string; | |
1531 | else | |
1532 | { | |
0afcef53 | 1533 | struct elf_x86_link_hash_table *htab; |
4dfe6ac6 | 1534 | |
0afcef53 | 1535 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
1536 | if (htab == NULL) |
1537 | name = "*unknown*"; | |
1538 | else | |
1539 | { | |
1540 | Elf_Internal_Sym *isym; | |
1541 | ||
f1dfbfdb | 1542 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, |
4dfe6ac6 NC |
1543 | abfd, r_symndx); |
1544 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1545 | } | |
4c544807 L |
1546 | } |
1547 | ||
4eca0228 | 1548 | _bfd_error_handler |
695344c0 | 1549 | /* xgettext:c-format */ |
2dcf00ce AM |
1550 | (_("%pB: TLS transition from %s to %s against `%s' at %#" PRIx64 |
1551 | " in section `%pA' failed"), | |
1552 | abfd, from->name, to->name, name, (uint64_t) rel->r_offset, sec); | |
142411ca | 1553 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 1554 | return false; |
142411ca L |
1555 | } |
1556 | ||
1557 | *r_type = to_type; | |
0a1b45a2 | 1558 | return true; |
bffbf940 JJ |
1559 | } |
1560 | ||
0a1b45a2 | 1561 | static bool |
aab921ad L |
1562 | elf_x86_64_need_pic (struct bfd_link_info *info, |
1563 | bfd *input_bfd, asection *sec, | |
338c190a L |
1564 | struct elf_link_hash_entry *h, |
1565 | Elf_Internal_Shdr *symtab_hdr, | |
1566 | Elf_Internal_Sym *isym, | |
1567 | reloc_howto_type *howto) | |
1568 | { | |
1569 | const char *v = ""; | |
1570 | const char *und = ""; | |
1571 | const char *pic = ""; | |
aab921ad | 1572 | const char *object; |
338c190a L |
1573 | |
1574 | const char *name; | |
1575 | if (h) | |
1576 | { | |
1577 | name = h->root.root.string; | |
1578 | switch (ELF_ST_VISIBILITY (h->other)) | |
1579 | { | |
1580 | case STV_HIDDEN: | |
1581 | v = _("hidden symbol "); | |
1582 | break; | |
1583 | case STV_INTERNAL: | |
1584 | v = _("internal symbol "); | |
1585 | break; | |
1586 | case STV_PROTECTED: | |
1587 | v = _("protected symbol "); | |
1588 | break; | |
1589 | default: | |
0afcef53 | 1590 | if (((struct elf_x86_link_hash_entry *) h)->def_protected) |
a5b4ee94 L |
1591 | v = _("protected symbol "); |
1592 | else | |
1593 | v = _("symbol "); | |
9a7f0679 | 1594 | pic = NULL; |
338c190a L |
1595 | break; |
1596 | } | |
1597 | ||
83924b38 | 1598 | if (!SYMBOL_DEFINED_NON_SHARED_P (h) && !h->def_dynamic) |
338c190a L |
1599 | und = _("undefined "); |
1600 | } | |
1601 | else | |
1602 | { | |
1603 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL); | |
9a7f0679 | 1604 | pic = NULL; |
338c190a L |
1605 | } |
1606 | ||
aab921ad | 1607 | if (bfd_link_dll (info)) |
9a7f0679 L |
1608 | { |
1609 | object = _("a shared object"); | |
1610 | if (!pic) | |
1611 | pic = _("; recompile with -fPIC"); | |
1612 | } | |
aab921ad | 1613 | else |
9a7f0679 L |
1614 | { |
1615 | if (bfd_link_pie (info)) | |
1616 | object = _("a PIE object"); | |
1617 | else | |
1618 | object = _("a PDE object"); | |
1619 | if (!pic) | |
1620 | pic = _("; recompile with -fPIE"); | |
1621 | } | |
aab921ad | 1622 | |
695344c0 | 1623 | /* xgettext:c-format */ |
871b3ab2 | 1624 | _bfd_error_handler (_("%pB: relocation %s against %s%s`%s' can " |
aab921ad L |
1625 | "not be used when making %s%s"), |
1626 | input_bfd, howto->name, und, v, name, | |
1627 | object, pic); | |
338c190a L |
1628 | bfd_set_error (bfd_error_bad_value); |
1629 | sec->check_relocs_failed = 1; | |
0a1b45a2 | 1630 | return false; |
338c190a | 1631 | } |
c1d11331 | 1632 | |
c175a657 L |
1633 | /* With the local symbol, foo, we convert |
1634 | mov foo@GOTPCREL(%rip), %reg | |
1635 | to | |
1636 | lea foo(%rip), %reg | |
1637 | and convert | |
1638 | call/jmp *foo@GOTPCREL(%rip) | |
1639 | to | |
1640 | nop call foo/jmp foo nop | |
1641 | When PIC is false, convert | |
1642 | test %reg, foo@GOTPCREL(%rip) | |
1643 | to | |
1644 | test $foo, %reg | |
1645 | and convert | |
1646 | binop foo@GOTPCREL(%rip), %reg | |
1647 | to | |
1648 | binop $foo, %reg | |
1649 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1650 | instructions. */ | |
1651 | ||
0a1b45a2 | 1652 | static bool |
8b43e456 | 1653 | elf_x86_64_convert_load_reloc (bfd *abfd, |
c175a657 | 1654 | bfd_byte *contents, |
6999821f | 1655 | unsigned int *r_type_p, |
c175a657 L |
1656 | Elf_Internal_Rela *irel, |
1657 | struct elf_link_hash_entry *h, | |
0a1b45a2 | 1658 | bool *converted, |
c175a657 L |
1659 | struct bfd_link_info *link_info) |
1660 | { | |
0afcef53 | 1661 | struct elf_x86_link_hash_table *htab; |
0a1b45a2 AM |
1662 | bool is_pic; |
1663 | bool no_overflow; | |
1664 | bool relocx; | |
1665 | bool to_reloc_pc32; | |
1666 | bool abs_symbol; | |
1667 | bool local_ref; | |
c175a657 | 1668 | asection *tsec; |
c175a657 L |
1669 | bfd_signed_vma raddend; |
1670 | unsigned int opcode; | |
1671 | unsigned int modrm; | |
6999821f | 1672 | unsigned int r_type = *r_type_p; |
c175a657 | 1673 | unsigned int r_symndx; |
c175a657 | 1674 | bfd_vma roff = irel->r_offset; |
382aae06 | 1675 | bfd_vma abs_relocation; |
c175a657 | 1676 | |
3d5a60de L |
1677 | if (roff < (r_type == R_X86_64_CODE_4_GOTPCRELX |
1678 | ? 4 : (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2))) | |
0a1b45a2 | 1679 | return true; |
c175a657 L |
1680 | |
1681 | raddend = irel->r_addend; | |
1682 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
1683 | if (raddend != -4) | |
0a1b45a2 | 1684 | return true; |
c175a657 | 1685 | |
0afcef53 | 1686 | htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA); |
c175a657 L |
1687 | is_pic = bfd_link_pic (link_info); |
1688 | ||
3d5a60de L |
1689 | if (r_type == R_X86_64_CODE_4_GOTPCRELX) |
1690 | { | |
1691 | /* Skip if this isn't a REX2 instruction. */ | |
1692 | opcode = bfd_get_8 (abfd, contents + roff - 4); | |
1693 | if (opcode != 0xd5) | |
1694 | return true; | |
1695 | ||
1696 | relocx = true; | |
1697 | } | |
1698 | else | |
1699 | relocx = (r_type == R_X86_64_GOTPCRELX | |
1700 | || r_type == R_X86_64_REX_GOTPCRELX); | |
c175a657 | 1701 | |
8b43e456 L |
1702 | /* TRUE if --no-relax is used. */ |
1703 | no_overflow = link_info->disable_target_specific_optimizations > 1; | |
c175a657 L |
1704 | |
1705 | r_symndx = htab->r_sym (irel->r_info); | |
1706 | ||
1707 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1708 | ||
1709 | /* Convert mov to lea since it has been done for a while. */ | |
1710 | if (opcode != 0x8b) | |
1711 | { | |
3d5a60de L |
1712 | /* Only convert R_X86_64_GOTPCRELX, R_X86_64_REX_GOTPCRELX |
1713 | and R_X86_64_CODE_4_GOTPCRELX for call, jmp or one of adc, | |
1714 | add, and, cmp, or, sbb, sub, test, xor instructions. */ | |
c175a657 | 1715 | if (!relocx) |
0a1b45a2 | 1716 | return true; |
c175a657 L |
1717 | } |
1718 | ||
1719 | /* We convert only to R_X86_64_PC32: | |
1720 | 1. Branch. | |
1721 | 2. R_X86_64_GOTPCREL since we can't modify REX byte. | |
8b43e456 | 1722 | 3. no_overflow is true. |
c175a657 L |
1723 | 4. PIC. |
1724 | */ | |
1725 | to_reloc_pc32 = (opcode == 0xff | |
1726 | || !relocx | |
8b43e456 | 1727 | || no_overflow |
c175a657 L |
1728 | || is_pic); |
1729 | ||
0a1b45a2 | 1730 | abs_symbol = false; |
382aae06 L |
1731 | abs_relocation = 0; |
1732 | ||
c175a657 L |
1733 | /* Get the symbol referred to by the reloc. */ |
1734 | if (h == NULL) | |
1735 | { | |
1736 | Elf_Internal_Sym *isym | |
f1dfbfdb | 1737 | = bfd_sym_from_r_symndx (&htab->elf.sym_cache, abfd, r_symndx); |
c175a657 L |
1738 | |
1739 | /* Skip relocation against undefined symbols. */ | |
1740 | if (isym->st_shndx == SHN_UNDEF) | |
0a1b45a2 | 1741 | return true; |
c175a657 | 1742 | |
0a1b45a2 | 1743 | local_ref = true; |
c175a657 | 1744 | if (isym->st_shndx == SHN_ABS) |
382aae06 L |
1745 | { |
1746 | tsec = bfd_abs_section_ptr; | |
0a1b45a2 | 1747 | abs_symbol = true; |
382aae06 L |
1748 | abs_relocation = isym->st_value; |
1749 | } | |
c175a657 L |
1750 | else if (isym->st_shndx == SHN_COMMON) |
1751 | tsec = bfd_com_section_ptr; | |
1752 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
1753 | tsec = &_bfd_elf_large_com_section; | |
1754 | else | |
1755 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c175a657 L |
1756 | } |
1757 | else | |
1758 | { | |
1759 | /* Undefined weak symbol is only bound locally in executable | |
1760 | and its reference is resolved as 0 without relocation | |
1761 | overflow. We can only perform this optimization for | |
1762 | GOTPCRELX relocations since we need to modify REX byte. | |
1763 | It is OK convert mov with R_X86_64_GOTPCREL to | |
1764 | R_X86_64_PC32. */ | |
0a27fed7 L |
1765 | struct elf_x86_link_hash_entry *eh = elf_x86_hash_entry (h); |
1766 | ||
382aae06 L |
1767 | abs_symbol = ABS_SYMBOL_P (h); |
1768 | abs_relocation = h->root.u.def.value; | |
1769 | ||
0a27fed7 L |
1770 | /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */ |
1771 | local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h); | |
c175a657 | 1772 | if ((relocx || opcode == 0x8b) |
0a27fed7 L |
1773 | && (h->root.type == bfd_link_hash_undefweak |
1774 | && !eh->linker_def | |
1775 | && local_ref)) | |
c175a657 L |
1776 | { |
1777 | if (opcode == 0xff) | |
1778 | { | |
1779 | /* Skip for branch instructions since R_X86_64_PC32 | |
1780 | may overflow. */ | |
8b43e456 | 1781 | if (no_overflow) |
0a1b45a2 | 1782 | return true; |
c175a657 L |
1783 | } |
1784 | else if (relocx) | |
1785 | { | |
1786 | /* For non-branch instructions, we can convert to | |
1787 | R_X86_64_32/R_X86_64_32S since we know if there | |
1788 | is a REX byte. */ | |
0a1b45a2 | 1789 | to_reloc_pc32 = false; |
c175a657 L |
1790 | } |
1791 | ||
1792 | /* Since we don't know the current PC when PIC is true, | |
1793 | we can't convert to R_X86_64_PC32. */ | |
1794 | if (to_reloc_pc32 && is_pic) | |
0a1b45a2 | 1795 | return true; |
c175a657 L |
1796 | |
1797 | goto convert; | |
1798 | } | |
1799 | /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since | |
1800 | ld.so may use its link-time address. */ | |
cbd0eecf | 1801 | else if (h->start_stop |
0a27fed7 | 1802 | || eh->linker_def |
cbd0eecf L |
1803 | || ((h->def_regular |
1804 | || h->root.type == bfd_link_hash_defined | |
1805 | || h->root.type == bfd_link_hash_defweak) | |
1806 | && h != htab->elf.hdynamic | |
0a27fed7 | 1807 | && local_ref)) |
c175a657 L |
1808 | { |
1809 | /* bfd_link_hash_new or bfd_link_hash_undefined is | |
1810 | set by an assignment in a linker script in | |
cbd0eecf L |
1811 | bfd_elf_record_link_assignment. start_stop is set |
1812 | on __start_SECNAME/__stop_SECNAME which mark section | |
1813 | SECNAME. */ | |
1814 | if (h->start_stop | |
0a27fed7 | 1815 | || eh->linker_def |
cbd0eecf L |
1816 | || (h->def_regular |
1817 | && (h->root.type == bfd_link_hash_new | |
1818 | || h->root.type == bfd_link_hash_undefined | |
1819 | || ((h->root.type == bfd_link_hash_defined | |
1820 | || h->root.type == bfd_link_hash_defweak) | |
1821 | && h->root.u.def.section == bfd_und_section_ptr)))) | |
c175a657 L |
1822 | { |
1823 | /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */ | |
8b43e456 | 1824 | if (no_overflow) |
0a1b45a2 | 1825 | return true; |
c175a657 L |
1826 | goto convert; |
1827 | } | |
1828 | tsec = h->root.u.def.section; | |
c175a657 L |
1829 | } |
1830 | else | |
0a1b45a2 | 1831 | return true; |
c175a657 L |
1832 | } |
1833 | ||
2168b268 L |
1834 | /* Don't convert GOTPCREL relocation against large section. */ |
1835 | if (elf_section_data (tsec) != NULL | |
1836 | && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0) | |
0a1b45a2 | 1837 | return true; |
2168b268 | 1838 | |
8b43e456 L |
1839 | /* Skip since R_X86_64_PC32/R_X86_64_32/R_X86_64_32S may overflow. */ |
1840 | if (no_overflow) | |
0a1b45a2 | 1841 | return true; |
c175a657 | 1842 | |
dc1e8a47 | 1843 | convert: |
c175a657 L |
1844 | if (opcode == 0xff) |
1845 | { | |
1846 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
1847 | unsigned int nop; | |
1848 | unsigned int disp; | |
1849 | bfd_vma nop_offset; | |
1850 | ||
1851 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
1852 | R_X86_64_PC32. */ | |
1853 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1854 | if (modrm == 0x25) | |
1855 | { | |
1856 | /* Convert to "jmp foo nop". */ | |
1857 | modrm = 0xe9; | |
1858 | nop = NOP_OPCODE; | |
1859 | nop_offset = irel->r_offset + 3; | |
1860 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1861 | irel->r_offset -= 1; | |
1862 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1863 | } | |
1864 | else | |
1865 | { | |
0afcef53 L |
1866 | struct elf_x86_link_hash_entry *eh |
1867 | = (struct elf_x86_link_hash_entry *) h; | |
e2cbcd91 | 1868 | |
c175a657 L |
1869 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
1870 | is a nop prefix. */ | |
1871 | modrm = 0xe8; | |
e2cbcd91 L |
1872 | /* To support TLS optimization, always use addr32 prefix for |
1873 | "call *__tls_get_addr@GOTPCREL(%rip)". */ | |
1d4af308 | 1874 | if (eh && eh->tls_get_addr) |
c175a657 | 1875 | { |
e2cbcd91 L |
1876 | nop = 0x67; |
1877 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1878 | } |
1879 | else | |
e2cbcd91 | 1880 | { |
5b9c07b2 L |
1881 | nop = htab->params->call_nop_byte; |
1882 | if (htab->params->call_nop_as_suffix) | |
e2cbcd91 L |
1883 | { |
1884 | nop_offset = irel->r_offset + 3; | |
1885 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1886 | irel->r_offset -= 1; | |
1887 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1888 | } | |
1889 | else | |
1890 | nop_offset = irel->r_offset - 2; | |
1891 | } | |
c175a657 L |
1892 | } |
1893 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1894 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1895 | r_type = R_X86_64_PC32; | |
1896 | } | |
1897 | else | |
1898 | { | |
3d5a60de | 1899 | unsigned int rex = 0; |
c175a657 | 1900 | unsigned int rex_mask = REX_R; |
3d5a60de L |
1901 | unsigned int rex2 = 0; |
1902 | unsigned int rex2_mask = REX_R | REX_R << 4; | |
1903 | bool rex_w = false; | |
c175a657 | 1904 | |
3d5a60de L |
1905 | if (r_type == R_X86_64_CODE_4_GOTPCRELX) |
1906 | { | |
1907 | rex2 = bfd_get_8 (abfd, contents + roff - 3); | |
1908 | rex_w = (rex2 & REX_W) != 0; | |
1909 | } | |
1910 | else if (r_type == R_X86_64_REX_GOTPCRELX) | |
1911 | { | |
1912 | rex = bfd_get_8 (abfd, contents + roff - 3); | |
1913 | rex_w = (rex & REX_W) != 0; | |
1914 | } | |
c175a657 L |
1915 | |
1916 | if (opcode == 0x8b) | |
1917 | { | |
7e45e7a9 | 1918 | if (abs_symbol && local_ref && relocx) |
0a1b45a2 | 1919 | to_reloc_pc32 = false; |
382aae06 | 1920 | |
c175a657 L |
1921 | if (to_reloc_pc32) |
1922 | { | |
1923 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1924 | "lea foo(%rip), %reg". */ | |
1925 | opcode = 0x8d; | |
1926 | r_type = R_X86_64_PC32; | |
1927 | } | |
1928 | else | |
1929 | { | |
1930 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1931 | "mov $foo, %reg". */ | |
1932 | opcode = 0xc7; | |
1933 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1934 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
3d5a60de | 1935 | if (rex_w && ABI_64_P (link_info->output_bfd)) |
c175a657 L |
1936 | { |
1937 | /* Keep the REX_W bit in REX byte for LP64. */ | |
1938 | r_type = R_X86_64_32S; | |
1939 | goto rewrite_modrm_rex; | |
1940 | } | |
1941 | else | |
1942 | { | |
1943 | /* If the REX_W bit in REX byte isn't needed, | |
1944 | use R_X86_64_32 and clear the W bit to avoid | |
1945 | sign-extend imm32 to imm64. */ | |
1946 | r_type = R_X86_64_32; | |
3d5a60de | 1947 | /* Clear the W bit in REX byte and REX2 payload. */ |
c175a657 | 1948 | rex_mask |= REX_W; |
3d5a60de | 1949 | rex2_mask |= REX_W; |
c175a657 L |
1950 | goto rewrite_modrm_rex; |
1951 | } | |
1952 | } | |
1953 | } | |
1954 | else | |
1955 | { | |
1956 | /* R_X86_64_PC32 isn't supported. */ | |
1957 | if (to_reloc_pc32) | |
0a1b45a2 | 1958 | return true; |
c175a657 L |
1959 | |
1960 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1961 | if (opcode == 0x85) | |
1962 | { | |
1963 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
1964 | "test $foo, %reg". */ | |
1965 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1966 | opcode = 0xf7; | |
1967 | } | |
1968 | else | |
1969 | { | |
1970 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
1971 | "binop $foo, %reg". */ | |
1972 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
1973 | opcode = 0x81; | |
1974 | } | |
1975 | ||
1976 | /* Use R_X86_64_32 with 32-bit operand to avoid relocation | |
1977 | overflow when sign-extending imm32 to imm64. */ | |
3d5a60de | 1978 | r_type = rex_w ? R_X86_64_32S : R_X86_64_32; |
c175a657 | 1979 | |
dc1e8a47 | 1980 | rewrite_modrm_rex: |
382aae06 L |
1981 | if (abs_relocation) |
1982 | { | |
1983 | /* Check if R_X86_64_32S/R_X86_64_32 fits. */ | |
1984 | if (r_type == R_X86_64_32S) | |
1985 | { | |
1986 | if ((abs_relocation + 0x80000000) > 0xffffffff) | |
0a1b45a2 | 1987 | return true; |
382aae06 L |
1988 | } |
1989 | else | |
1990 | { | |
1991 | if (abs_relocation > 0xffffffff) | |
0a1b45a2 | 1992 | return true; |
382aae06 L |
1993 | } |
1994 | } | |
1995 | ||
c175a657 L |
1996 | bfd_put_8 (abfd, modrm, contents + roff - 1); |
1997 | ||
1998 | if (rex) | |
1999 | { | |
2000 | /* Move the R bit to the B bit in REX byte. */ | |
2001 | rex = (rex & ~rex_mask) | (rex & REX_R) >> 2; | |
2002 | bfd_put_8 (abfd, rex, contents + roff - 3); | |
2003 | } | |
3d5a60de L |
2004 | else if (rex2) |
2005 | { | |
2006 | /* Move the R bits to the B bits in REX2 payload byte. */ | |
2007 | rex2 = ((rex2 & ~rex2_mask) | |
2008 | | (rex2 & (REX_R | REX_R << 4)) >> 2); | |
2009 | bfd_put_8 (abfd, rex2, contents + roff - 3); | |
2010 | } | |
c175a657 L |
2011 | |
2012 | /* No addend for R_X86_64_32/R_X86_64_32S relocations. */ | |
2013 | irel->r_addend = 0; | |
2014 | } | |
2015 | ||
2016 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
2017 | } | |
2018 | ||
6999821f | 2019 | *r_type_p = r_type; |
78984959 L |
2020 | irel->r_info = htab->r_info (r_symndx, |
2021 | r_type | R_X86_64_converted_reloc_bit); | |
c175a657 | 2022 | |
0a1b45a2 | 2023 | *converted = true; |
c175a657 | 2024 | |
0a1b45a2 | 2025 | return true; |
c175a657 L |
2026 | } |
2027 | ||
70256ad8 | 2028 | /* Look through the relocs for a section during the first phase, and |
3747999c L |
2029 | calculate needed space in the global offset table, and procedure |
2030 | linkage table. */ | |
70256ad8 | 2031 | |
0a1b45a2 | 2032 | static bool |
3747999c L |
2033 | elf_x86_64_scan_relocs (bfd *abfd, struct bfd_link_info *info, |
2034 | asection *sec, | |
2035 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 2036 | { |
0afcef53 | 2037 | struct elf_x86_link_hash_table *htab; |
70256ad8 AJ |
2038 | Elf_Internal_Shdr *symtab_hdr; |
2039 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
2040 | const Elf_Internal_Rela *rel; |
2041 | const Elf_Internal_Rela *rel_end; | |
bedfd056 | 2042 | bfd_byte *contents; |
0a1b45a2 | 2043 | bool converted; |
70256ad8 | 2044 | |
0e1862bb | 2045 | if (bfd_link_relocatable (info)) |
0a1b45a2 | 2046 | return true; |
70256ad8 | 2047 | |
0afcef53 | 2048 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 | 2049 | if (htab == NULL) |
afd9acee L |
2050 | { |
2051 | sec->check_relocs_failed = 1; | |
0a1b45a2 | 2052 | return false; |
afd9acee | 2053 | } |
4dfe6ac6 | 2054 | |
fe53b4a4 L |
2055 | BFD_ASSERT (is_x86_elf (abfd, htab)); |
2056 | ||
bedfd056 L |
2057 | /* Get the section contents. */ |
2058 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2059 | contents = elf_section_data (sec)->this_hdr.contents; | |
2060 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2061 | { | |
2062 | sec->check_relocs_failed = 1; | |
0a1b45a2 | 2063 | return false; |
bedfd056 L |
2064 | } |
2065 | ||
0ffa91dd | 2066 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 2067 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 2068 | |
0a1b45a2 | 2069 | converted = false; |
5e5e02ae | 2070 | |
70256ad8 AJ |
2071 | rel_end = relocs + sec->reloc_count; |
2072 | for (rel = relocs; rel < rel_end; rel++) | |
2073 | { | |
bffbf940 | 2074 | unsigned int r_type; |
d42c267e | 2075 | unsigned int r_symndx; |
70256ad8 | 2076 | struct elf_link_hash_entry *h; |
0afcef53 | 2077 | struct elf_x86_link_hash_entry *eh; |
4c544807 L |
2078 | Elf_Internal_Sym *isym; |
2079 | const char *name; | |
0a1b45a2 AM |
2080 | bool size_reloc; |
2081 | bool converted_reloc; | |
2082 | bool no_dynreloc; | |
70256ad8 | 2083 | |
351f65ca L |
2084 | r_symndx = htab->r_sym (rel->r_info); |
2085 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 | 2086 | |
2e93abb8 L |
2087 | /* Don't check R_X86_64_NONE. */ |
2088 | if (r_type == R_X86_64_NONE) | |
2089 | continue; | |
2090 | ||
c434dee6 AJ |
2091 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
2092 | { | |
695344c0 | 2093 | /* xgettext:c-format */ |
871b3ab2 | 2094 | _bfd_error_handler (_("%pB: bad symbol index: %d"), |
4eca0228 | 2095 | abfd, r_symndx); |
afd9acee | 2096 | goto error_return; |
c434dee6 AJ |
2097 | } |
2098 | ||
70256ad8 | 2099 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
2100 | { |
2101 | /* A local symbol. */ | |
f1dfbfdb | 2102 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, |
c2e61a4e L |
2103 | abfd, r_symndx); |
2104 | if (isym == NULL) | |
afd9acee | 2105 | goto error_return; |
c25bc9fc L |
2106 | |
2107 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 2108 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 2109 | { |
0afcef53 | 2110 | h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, |
0a1b45a2 | 2111 | true); |
c25bc9fc | 2112 | if (h == NULL) |
afd9acee | 2113 | goto error_return; |
6bbec505 | 2114 | |
c25bc9fc | 2115 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
2116 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
2117 | isym, NULL); | |
c25bc9fc L |
2118 | h->type = STT_GNU_IFUNC; |
2119 | h->def_regular = 1; | |
2120 | h->ref_regular = 1; | |
2121 | h->forced_local = 1; | |
2122 | h->root.type = bfd_link_hash_defined; | |
2123 | } | |
2124 | else | |
2125 | h = NULL; | |
2126 | } | |
70256ad8 | 2127 | else |
71cb9464 | 2128 | { |
4c544807 | 2129 | isym = NULL; |
71cb9464 L |
2130 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
2131 | while (h->root.type == bfd_link_hash_indirect | |
2132 | || h->root.type == bfd_link_hash_warning) | |
2133 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 2134 | } |
cbe950e9 | 2135 | |
d1534d16 L |
2136 | /* Check invalid x32 relocations. */ |
2137 | if (!ABI_64_P (abfd)) | |
2138 | switch (r_type) | |
2139 | { | |
2140 | default: | |
2141 | break; | |
2142 | ||
d1534d16 L |
2143 | case R_X86_64_DTPOFF64: |
2144 | case R_X86_64_TPOFF64: | |
2145 | case R_X86_64_PC64: | |
2146 | case R_X86_64_GOTOFF64: | |
2147 | case R_X86_64_GOT64: | |
2148 | case R_X86_64_GOTPCREL64: | |
2149 | case R_X86_64_GOTPC64: | |
2150 | case R_X86_64_GOTPLT64: | |
2151 | case R_X86_64_PLTOFF64: | |
2152 | { | |
2153 | if (h) | |
2154 | name = h->root.root.string; | |
2155 | else | |
2156 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
2157 | NULL); | |
4eca0228 | 2158 | _bfd_error_handler |
695344c0 | 2159 | /* xgettext:c-format */ |
871b3ab2 | 2160 | (_("%pB: relocation %s against symbol `%s' isn't " |
d1534d16 L |
2161 | "supported in x32 mode"), abfd, |
2162 | x86_64_elf_howto_table[r_type].name, name); | |
2163 | bfd_set_error (bfd_error_bad_value); | |
afd9acee | 2164 | goto error_return; |
d1534d16 L |
2165 | } |
2166 | break; | |
2167 | } | |
2168 | ||
6f365fda L |
2169 | eh = (struct elf_x86_link_hash_entry *) h; |
2170 | ||
c25bc9fc L |
2171 | if (h != NULL) |
2172 | { | |
ad1e85de L |
2173 | /* It is referenced by a non-shared object. */ |
2174 | h->ref_regular = 1; | |
71cb9464 | 2175 | } |
70256ad8 | 2176 | |
0a1b45a2 | 2177 | converted_reloc = false; |
6999821f L |
2178 | if ((r_type == R_X86_64_GOTPCREL |
2179 | || r_type == R_X86_64_GOTPCRELX | |
3d5a60de L |
2180 | || r_type == R_X86_64_REX_GOTPCRELX |
2181 | || r_type == R_X86_64_CODE_4_GOTPCRELX) | |
6999821f L |
2182 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
2183 | { | |
2184 | Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel; | |
2185 | if (!elf_x86_64_convert_load_reloc (abfd, contents, &r_type, | |
2186 | irel, h, &converted_reloc, | |
2187 | info)) | |
2188 | goto error_return; | |
5e5e02ae L |
2189 | |
2190 | if (converted_reloc) | |
0a1b45a2 | 2191 | converted = true; |
6999821f L |
2192 | } |
2193 | ||
382aae06 L |
2194 | if (!_bfd_elf_x86_valid_reloc_p (sec, info, htab, rel, h, isym, |
2195 | symtab_hdr, &no_dynreloc)) | |
0a1b45a2 | 2196 | return false; |
382aae06 | 2197 | |
bedfd056 | 2198 | if (! elf_x86_64_tls_transition (info, abfd, sec, contents, |
351f65ca L |
2199 | symtab_hdr, sym_hashes, |
2200 | &r_type, GOT_UNKNOWN, | |
0a1b45a2 | 2201 | rel, rel_end, h, r_symndx, false)) |
afd9acee | 2202 | goto error_return; |
142411ca | 2203 | |
cd048363 L |
2204 | /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */ |
2205 | if (h == htab->elf.hgot) | |
0a1b45a2 | 2206 | htab->got_referenced = true; |
cd048363 | 2207 | |
bffbf940 | 2208 | switch (r_type) |
70256ad8 | 2209 | { |
bffbf940 | 2210 | case R_X86_64_TLSLD: |
0f09b4d8 | 2211 | htab->tls_ld_or_ldm_got.refcount = 1; |
bffbf940 JJ |
2212 | goto create_got; |
2213 | ||
2214 | case R_X86_64_TPOFF32: | |
0e1862bb | 2215 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
aab921ad | 2216 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2217 | &x86_64_elf_howto_table[r_type]); |
aec6b87e | 2218 | if (eh != NULL) |
98b273dc | 2219 | eh->zero_undefweak &= 0x2; |
bffbf940 | 2220 | break; |
c434dee6 | 2221 | |
bffbf940 | 2222 | case R_X86_64_GOTTPOFF: |
a533c8df | 2223 | case R_X86_64_CODE_4_GOTTPOFF: |
5bc71c2a | 2224 | case R_X86_64_CODE_6_GOTTPOFF: |
0e1862bb | 2225 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
2226 | info->flags |= DF_STATIC_TLS; |
2227 | /* Fall through */ | |
70256ad8 | 2228 | |
bffbf940 JJ |
2229 | case R_X86_64_GOT32: |
2230 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
2231 | case R_X86_64_GOTPCRELX: |
2232 | case R_X86_64_REX_GOTPCRELX: | |
3d5a60de | 2233 | case R_X86_64_CODE_4_GOTPCRELX: |
bffbf940 | 2234 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
2235 | case R_X86_64_GOT64: |
2236 | case R_X86_64_GOTPCREL64: | |
2237 | case R_X86_64_GOTPLT64: | |
67a4f2b7 | 2238 | case R_X86_64_GOTPC32_TLSDESC: |
a533c8df | 2239 | case R_X86_64_CODE_4_GOTPC32_TLSDESC: |
67a4f2b7 | 2240 | case R_X86_64_TLSDESC_CALL: |
bffbf940 JJ |
2241 | /* This symbol requires a global offset table entry. */ |
2242 | { | |
2243 | int tls_type, old_tls_type; | |
2244 | ||
2245 | switch (r_type) | |
2246 | { | |
382aae06 L |
2247 | default: |
2248 | tls_type = GOT_NORMAL; | |
2249 | if (h) | |
2250 | { | |
2251 | if (ABS_SYMBOL_P (h)) | |
2252 | tls_type = GOT_ABS; | |
2253 | } | |
2254 | else if (isym->st_shndx == SHN_ABS) | |
2255 | tls_type = GOT_ABS; | |
2256 | break; | |
2257 | case R_X86_64_TLSGD: | |
2258 | tls_type = GOT_TLS_GD; | |
2259 | break; | |
2260 | case R_X86_64_GOTTPOFF: | |
a533c8df | 2261 | case R_X86_64_CODE_4_GOTTPOFF: |
5bc71c2a | 2262 | case R_X86_64_CODE_6_GOTTPOFF: |
382aae06 L |
2263 | tls_type = GOT_TLS_IE; |
2264 | break; | |
67a4f2b7 | 2265 | case R_X86_64_GOTPC32_TLSDESC: |
a533c8df | 2266 | case R_X86_64_CODE_4_GOTPC32_TLSDESC: |
67a4f2b7 | 2267 | case R_X86_64_TLSDESC_CALL: |
382aae06 L |
2268 | tls_type = GOT_TLS_GDESC; |
2269 | break; | |
bffbf940 JJ |
2270 | } |
2271 | ||
2272 | if (h != NULL) | |
2273 | { | |
0f09b4d8 | 2274 | h->got.refcount = 1; |
aec6b87e | 2275 | old_tls_type = eh->tls_type; |
bffbf940 JJ |
2276 | } |
2277 | else | |
2278 | { | |
2279 | bfd_signed_vma *local_got_refcounts; | |
2280 | ||
bbdeb108 L |
2281 | if (!elf_x86_allocate_local_got_info (abfd, |
2282 | symtab_hdr->sh_info)) | |
2283 | goto error_return; | |
2284 | ||
bffbf940 JJ |
2285 | /* This is a global offset table entry for a local symbol. */ |
2286 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
0f09b4d8 | 2287 | local_got_refcounts[r_symndx] = 1; |
bffbf940 | 2288 | old_tls_type |
0afcef53 | 2289 | = elf_x86_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
2290 | } |
2291 | ||
2292 | /* If a TLS symbol is accessed using IE at least once, | |
2293 | there is no point to use dynamic model for it. */ | |
2294 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
2295 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
2296 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 2297 | { |
67a4f2b7 | 2298 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 2299 | tls_type = old_tls_type; |
67a4f2b7 AO |
2300 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2301 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2302 | tls_type |= old_tls_type; | |
bffbf940 JJ |
2303 | else |
2304 | { | |
09a24cbf | 2305 | if (h) |
4c544807 L |
2306 | name = h->root.root.string; |
2307 | else | |
2308 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
2309 | isym, NULL); | |
4eca0228 | 2310 | _bfd_error_handler |
695344c0 | 2311 | /* xgettext:c-format */ |
871b3ab2 | 2312 | (_("%pB: '%s' accessed both as normal and" |
63a5468a | 2313 | " thread local symbol"), |
4c544807 | 2314 | abfd, name); |
68c4a57e | 2315 | bfd_set_error (bfd_error_bad_value); |
afd9acee | 2316 | goto error_return; |
bffbf940 JJ |
2317 | } |
2318 | } | |
2319 | ||
2320 | if (old_tls_type != tls_type) | |
2321 | { | |
aec6b87e L |
2322 | if (eh != NULL) |
2323 | eh->tls_type = tls_type; | |
bffbf940 | 2324 | else |
0afcef53 | 2325 | elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
2326 | } |
2327 | } | |
c434dee6 AJ |
2328 | /* Fall through */ |
2329 | ||
d6ab8113 JB |
2330 | case R_X86_64_GOTOFF64: |
2331 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2332 | case R_X86_64_GOTPC64: |
bffbf940 | 2333 | create_got: |
aec6b87e | 2334 | if (eh != NULL) |
98b273dc | 2335 | eh->zero_undefweak &= 0x2; |
70256ad8 AJ |
2336 | break; |
2337 | ||
2338 | case R_X86_64_PLT32: | |
2339 | /* This symbol requires a procedure linkage table entry. We | |
407443a3 AJ |
2340 | actually build the entry in adjust_dynamic_symbol, |
2341 | because this might be a case of linking PIC code which is | |
2342 | never referenced by a dynamic object, in which case we | |
2343 | don't need to generate a procedure linkage table entry | |
2344 | after all. */ | |
70256ad8 AJ |
2345 | |
2346 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 2347 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
2348 | if (h == NULL) |
2349 | continue; | |
2350 | ||
98b273dc | 2351 | eh->zero_undefweak &= 0x2; |
f5385ebf | 2352 | h->needs_plt = 1; |
79b0c981 | 2353 | h->plt.refcount = 1; |
70256ad8 AJ |
2354 | break; |
2355 | ||
7b81dfbb AJ |
2356 | case R_X86_64_PLTOFF64: |
2357 | /* This tries to form the 'address' of a function relative | |
2358 | to GOT. For global symbols we need a PLT entry. */ | |
2359 | if (h != NULL) | |
2360 | { | |
2361 | h->needs_plt = 1; | |
79b0c981 | 2362 | h->plt.refcount = 1; |
7b81dfbb AJ |
2363 | } |
2364 | goto create_got; | |
2365 | ||
6a3e1bae L |
2366 | case R_X86_64_SIZE32: |
2367 | case R_X86_64_SIZE64: | |
0a1b45a2 | 2368 | size_reloc = true; |
6a3e1bae L |
2369 | goto do_size; |
2370 | ||
248775ba L |
2371 | case R_X86_64_32: |
2372 | if (!ABI_64_P (abfd)) | |
2373 | goto pointer; | |
1a0670f3 | 2374 | /* Fall through. */ |
cc78d0af AJ |
2375 | case R_X86_64_8: |
2376 | case R_X86_64_16: | |
70256ad8 | 2377 | case R_X86_64_32S: |
338c190a L |
2378 | /* Check relocation overflow as these relocs may lead to |
2379 | run-time relocation overflow. Don't error out for | |
1b71fb54 | 2380 | sections we don't care about, such as debug sections or |
338c190a | 2381 | when relocation overflow check is disabled. */ |
5b9c07b2 | 2382 | if (!htab->params->no_reloc_overflow_check |
6999821f | 2383 | && !converted_reloc |
338c190a L |
2384 | && (bfd_link_pic (info) |
2385 | || (bfd_link_executable (info) | |
2386 | && h != NULL | |
2387 | && !h->def_regular | |
2388 | && h->def_dynamic | |
081b1afe | 2389 | && (sec->flags & SEC_READONLY) == 0))) |
aab921ad | 2390 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2391 | &x86_64_elf_howto_table[r_type]); |
1b71fb54 AJ |
2392 | /* Fall through. */ |
2393 | ||
81e8046d L |
2394 | case R_X86_64_PC8: |
2395 | case R_X86_64_PC16: | |
2396 | case R_X86_64_PC32: | |
d6ab8113 | 2397 | case R_X86_64_PC64: |
1b71fb54 | 2398 | case R_X86_64_64: |
dc1e8a47 | 2399 | pointer: |
aec6b87e | 2400 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
98b273dc | 2401 | eh->zero_undefweak |= 0x2; |
bf52d7c7 L |
2402 | /* We are called after all symbols have been resolved. Only |
2403 | relocation against STT_GNU_IFUNC symbol must go through | |
2404 | PLT. */ | |
d1ed1c7d L |
2405 | if (h != NULL |
2406 | && (bfd_link_executable (info) | |
bf52d7c7 | 2407 | || h->type == STT_GNU_IFUNC)) |
c434dee6 | 2408 | { |
0a1b45a2 | 2409 | bool func_pointer_ref = false; |
233cc9c1 | 2410 | |
5db4f0d3 L |
2411 | if (r_type == R_X86_64_PC32) |
2412 | { | |
2413 | /* Since something like ".long foo - ." may be used | |
2414 | as pointer, make sure that PLT is used if foo is | |
2415 | a function defined in a shared library. */ | |
2416 | if ((sec->flags & SEC_CODE) == 0) | |
451875b4 L |
2417 | { |
2418 | h->pointer_equality_needed = 1; | |
2419 | if (bfd_link_pie (info) | |
2420 | && h->type == STT_FUNC | |
2421 | && !h->def_regular | |
2422 | && h->def_dynamic) | |
2423 | { | |
2424 | h->needs_plt = 1; | |
2425 | h->plt.refcount = 1; | |
2426 | } | |
2427 | } | |
5db4f0d3 | 2428 | } |
8ad93045 | 2429 | else if (r_type != R_X86_64_PC64) |
04ebc307 | 2430 | { |
04ebc307 L |
2431 | /* At run-time, R_X86_64_64 can be resolved for both |
2432 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
68c4956b L |
2433 | can only be resolved for x32. Function pointer |
2434 | reference doesn't need PLT for pointer equality. */ | |
04ebc307 L |
2435 | if ((sec->flags & SEC_READONLY) == 0 |
2436 | && (r_type == R_X86_64_64 | |
2437 | || (!ABI_64_P (abfd) | |
2438 | && (r_type == R_X86_64_32 | |
2439 | || r_type == R_X86_64_32S)))) | |
0a1b45a2 | 2440 | func_pointer_ref = true; |
98a1627f L |
2441 | |
2442 | /* IFUNC symbol needs pointer equality in PDE so that | |
2443 | function pointer reference will be resolved to its | |
2444 | PLT entry directly. */ | |
2445 | if (!func_pointer_ref | |
2446 | || (bfd_link_pde (info) | |
2447 | && h->type == STT_GNU_IFUNC)) | |
68c4956b | 2448 | h->pointer_equality_needed = 1; |
ebb191ad L |
2449 | } |
2450 | ||
79b0c981 L |
2451 | if (!func_pointer_ref) |
2452 | { | |
2453 | /* If this reloc is in a read-only section, we might | |
2454 | need a copy reloc. We can't check reliably at this | |
2455 | stage whether the section is read-only, as input | |
2456 | sections have not yet been mapped to output sections. | |
2457 | Tentatively set the flag for now, and correct in | |
2458 | adjust_dynamic_symbol. */ | |
2459 | h->non_got_ref = 1; | |
2460 | ||
6f365fda L |
2461 | if (!elf_has_indirect_extern_access (sec->owner)) |
2462 | eh->non_got_ref_without_indirect_extern_access = 1; | |
2463 | ||
79b0c981 L |
2464 | /* We may need a .plt entry if the symbol is a function |
2465 | defined in a shared lib or is a function referenced | |
2466 | from the code or read-only section. */ | |
2467 | if (!h->def_regular | |
2468 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
2469 | h->plt.refcount = 1; | |
68c4956b | 2470 | |
2c43d202 L |
2471 | if (htab->elf.target_os != is_solaris |
2472 | && h->pointer_equality_needed | |
68c4956b L |
2473 | && h->type == STT_FUNC |
2474 | && eh->def_protected | |
bd073612 | 2475 | && !SYMBOL_DEFINED_NON_SHARED_P (h) |
f6386577 | 2476 | && h->def_dynamic) |
68c4956b L |
2477 | { |
2478 | /* Disallow non-canonical reference to canonical | |
2479 | protected function. */ | |
2480 | _bfd_error_handler | |
2481 | /* xgettext:c-format */ | |
2482 | (_("%pB: non-canonical reference to canonical " | |
2483 | "protected function `%s' in %pB"), | |
2484 | abfd, h->root.root.string, | |
2485 | h->root.u.def.section->owner); | |
2486 | bfd_set_error (bfd_error_bad_value); | |
2487 | goto error_return; | |
2488 | } | |
04ebc307 | 2489 | } |
c434dee6 | 2490 | } |
70256ad8 | 2491 | |
0a1b45a2 | 2492 | size_reloc = false; |
dc1e8a47 | 2493 | do_size: |
382aae06 | 2494 | if (!no_dynreloc |
831083d3 L |
2495 | && NEED_DYNAMIC_RELOCATION_P (true, info, true, h, sec, |
2496 | r_type, | |
382aae06 | 2497 | htab->pointer_r_type)) |
70256ad8 | 2498 | { |
e03a8ed8 L |
2499 | struct elf_dyn_relocs *p; |
2500 | struct elf_dyn_relocs **head; | |
c434dee6 | 2501 | |
c434dee6 AJ |
2502 | /* If this is a global symbol, we count the number of |
2503 | relocations we need for this symbol. */ | |
2504 | if (h != NULL) | |
190eb1dd | 2505 | head = &h->dyn_relocs; |
c434dee6 AJ |
2506 | else |
2507 | { | |
2508 | /* Track dynamic relocs needed for local syms too. | |
2509 | We really need local syms available to do this | |
2510 | easily. Oh well. */ | |
c434dee6 | 2511 | asection *s; |
87d72d41 | 2512 | void **vpp; |
87d72d41 | 2513 | |
f1dfbfdb | 2514 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, |
87d72d41 AM |
2515 | abfd, r_symndx); |
2516 | if (isym == NULL) | |
afd9acee | 2517 | goto error_return; |
87d72d41 AM |
2518 | |
2519 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2520 | if (s == NULL) |
87d72d41 | 2521 | s = sec; |
70256ad8 | 2522 | |
e81d3500 DD |
2523 | /* Beware of type punned pointers vs strict aliasing |
2524 | rules. */ | |
2525 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2526 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2527 | } |
70256ad8 | 2528 | |
c434dee6 AJ |
2529 | p = *head; |
2530 | if (p == NULL || p->sec != sec) | |
2531 | { | |
986f0783 | 2532 | size_t amt = sizeof *p; |
d8045f23 | 2533 | |
e03a8ed8 | 2534 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2535 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2536 | if (p == NULL) |
afd9acee | 2537 | goto error_return; |
c434dee6 AJ |
2538 | p->next = *head; |
2539 | *head = p; | |
2540 | p->sec = sec; | |
2541 | p->count = 0; | |
2542 | p->pc_count = 0; | |
70256ad8 | 2543 | } |
c434dee6 AJ |
2544 | |
2545 | p->count += 1; | |
06a6a421 | 2546 | /* Count size relocation as PC-relative relocation. */ |
831083d3 | 2547 | if (X86_PCREL_TYPE_P (true, r_type) || size_reloc) |
c434dee6 | 2548 | p->pc_count += 1; |
70256ad8 AJ |
2549 | } |
2550 | break; | |
fe4770f4 | 2551 | |
5bc71c2a L |
2552 | case R_X86_64_CODE_5_GOTPCRELX: |
2553 | case R_X86_64_CODE_5_GOTTPOFF: | |
2554 | case R_X86_64_CODE_5_GOTPC32_TLSDESC: | |
2555 | case R_X86_64_CODE_6_GOTPCRELX: | |
2556 | case R_X86_64_CODE_6_GOTPC32_TLSDESC: | |
2557 | { | |
2558 | /* These relocations are added only for completeness and | |
2559 | aren't be used. */ | |
2560 | if (h) | |
2561 | name = h->root.root.string; | |
2562 | else | |
2563 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
2564 | NULL); | |
2565 | _bfd_error_handler | |
2566 | /* xgettext:c-format */ | |
2567 | (_("%pB: unsupported relocation %s against symbol `%s'"), | |
2568 | abfd, x86_64_elf_howto_table[r_type].name, name); | |
2569 | } | |
2570 | break; | |
2571 | ||
fe4770f4 AJ |
2572 | /* This relocation describes the C++ object vtable hierarchy. |
2573 | Reconstruct it for later use during GC. */ | |
2574 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2575 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
afd9acee | 2576 | goto error_return; |
fe4770f4 AJ |
2577 | break; |
2578 | ||
2579 | /* This relocation describes which C++ vtable entries are actually | |
2580 | used. Record for later use during GC. */ | |
2581 | case R_X86_64_GNU_VTENTRY: | |
a0ea3a14 | 2582 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
afd9acee | 2583 | goto error_return; |
fe4770f4 | 2584 | break; |
c434dee6 AJ |
2585 | |
2586 | default: | |
2587 | break; | |
70256ad8 AJ |
2588 | } |
2589 | } | |
2590 | ||
bedfd056 L |
2591 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2592 | { | |
a8dde0a2 | 2593 | if (!converted && !_bfd_link_keep_memory (info)) |
bedfd056 L |
2594 | free (contents); |
2595 | else | |
2596 | { | |
5e5e02ae L |
2597 | /* Cache the section contents for elf_link_input_bfd if any |
2598 | load is converted or --no-keep-memory isn't used. */ | |
bedfd056 | 2599 | elf_section_data (sec)->this_hdr.contents = contents; |
a8dde0a2 | 2600 | info->cache_size += sec->size; |
bedfd056 L |
2601 | } |
2602 | } | |
2603 | ||
5e5e02ae L |
2604 | /* Cache relocations if any load is converted. */ |
2605 | if (elf_section_data (sec)->relocs != relocs && converted) | |
2606 | elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs; | |
2607 | ||
0a1b45a2 | 2608 | return true; |
afd9acee | 2609 | |
dc1e8a47 | 2610 | error_return: |
bedfd056 L |
2611 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2612 | free (contents); | |
afd9acee | 2613 | sec->check_relocs_failed = 1; |
0a1b45a2 | 2614 | return false; |
70256ad8 AJ |
2615 | } |
2616 | ||
3747999c | 2617 | static bool |
af969b14 | 2618 | elf_x86_64_early_size_sections (bfd *output_bfd, struct bfd_link_info *info) |
3747999c L |
2619 | { |
2620 | bfd *abfd; | |
2621 | ||
2622 | /* Scan relocations after rel_from_abs has been set on __ehdr_start. */ | |
2623 | for (abfd = info->input_bfds; | |
2624 | abfd != (bfd *) NULL; | |
2625 | abfd = abfd->link.next) | |
2626 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
2627 | && !_bfd_elf_link_iterate_on_relocs (abfd, info, | |
2628 | elf_x86_64_scan_relocs)) | |
2629 | return false; | |
2630 | ||
af969b14 | 2631 | return _bfd_x86_elf_early_size_sections (output_bfd, info); |
3747999c L |
2632 | } |
2633 | ||
bffbf940 JJ |
2634 | /* Return the relocation value for @tpoff relocation |
2635 | if STT_TLS virtual address is ADDRESS. */ | |
2636 | ||
2637 | static bfd_vma | |
351f65ca | 2638 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 2639 | { |
e1918d23 | 2640 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
2641 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
2642 | bfd_vma static_tls_size; | |
bffbf940 JJ |
2643 | |
2644 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 2645 | if (htab->tls_sec == NULL) |
bffbf940 | 2646 | return 0; |
7dc98aea RO |
2647 | |
2648 | /* Consider special static TLS alignment requirements. */ | |
2649 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
2650 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
2651 | } |
2652 | ||
8d88c4ca NC |
2653 | /* Relocate an x86_64 ELF section. */ |
2654 | ||
0f684201 | 2655 | static int |
351f65ca L |
2656 | elf_x86_64_relocate_section (bfd *output_bfd, |
2657 | struct bfd_link_info *info, | |
2658 | bfd *input_bfd, | |
2659 | asection *input_section, | |
2660 | bfd_byte *contents, | |
2661 | Elf_Internal_Rela *relocs, | |
2662 | Elf_Internal_Sym *local_syms, | |
2663 | asection **local_sections) | |
8d88c4ca | 2664 | { |
0afcef53 | 2665 | struct elf_x86_link_hash_table *htab; |
8d88c4ca NC |
2666 | Elf_Internal_Shdr *symtab_hdr; |
2667 | struct elf_link_hash_entry **sym_hashes; | |
2668 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2669 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 2670 | Elf_Internal_Rela *rel; |
60f2e42e | 2671 | Elf_Internal_Rela *wrel; |
8d88c4ca | 2672 | Elf_Internal_Rela *relend; |
38b12349 | 2673 | unsigned int plt_entry_size; |
0a1b45a2 | 2674 | bool status; |
8d88c4ca | 2675 | |
3747999c | 2676 | /* Skip if check_relocs or scan_relocs failed. */ |
338c190a | 2677 | if (input_section->check_relocs_failed) |
0a1b45a2 | 2678 | return false; |
338c190a | 2679 | |
0afcef53 | 2680 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 | 2681 | if (htab == NULL) |
0a1b45a2 | 2682 | return false; |
fe53b4a4 | 2683 | |
7af5d5c4 AM |
2684 | if (!is_x86_elf (input_bfd, htab)) |
2685 | { | |
2686 | bfd_set_error (bfd_error_wrong_format); | |
0a1b45a2 | 2687 | return false; |
7af5d5c4 | 2688 | } |
fe53b4a4 | 2689 | |
765e526c | 2690 | plt_entry_size = htab->plt.plt_entry_size; |
0ffa91dd | 2691 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
2692 | sym_hashes = elf_sym_hashes (input_bfd); |
2693 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
0afcef53 | 2694 | local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 2695 | |
0afcef53 | 2696 | _bfd_x86_elf_set_tls_module_base (info); |
9f03412a | 2697 | |
0a1b45a2 | 2698 | status = true; |
60f2e42e | 2699 | rel = wrel = relocs; |
8d88c4ca | 2700 | relend = relocs + input_section->reloc_count; |
60f2e42e | 2701 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 2702 | { |
419414ea | 2703 | unsigned int r_type, r_type_tls; |
8d88c4ca NC |
2704 | reloc_howto_type *howto; |
2705 | unsigned long r_symndx; | |
2706 | struct elf_link_hash_entry *h; | |
0afcef53 | 2707 | struct elf_x86_link_hash_entry *eh; |
8d88c4ca NC |
2708 | Elf_Internal_Sym *sym; |
2709 | asection *sec; | |
0ff2b86e | 2710 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 2711 | bfd_vma relocation; |
0a1b45a2 | 2712 | bool unresolved_reloc; |
8d88c4ca | 2713 | bfd_reloc_status_type r; |
bffbf940 | 2714 | int tls_type; |
0ff2b86e | 2715 | asection *base_got, *resolved_plt; |
1788fc08 | 2716 | bfd_vma st_size; |
0a1b45a2 AM |
2717 | bool resolved_to_zero; |
2718 | bool relative_reloc; | |
2719 | bool converted_reloc; | |
2720 | bool need_copy_reloc_in_pie; | |
2721 | bool no_copyreloc_p; | |
8d88c4ca | 2722 | |
351f65ca | 2723 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
2724 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
2725 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
2726 | { |
2727 | if (wrel != rel) | |
2728 | *wrel = *rel; | |
2729 | continue; | |
2730 | } | |
8d88c4ca | 2731 | |
b638b5d5 | 2732 | r_symndx = htab->r_sym (rel->r_info); |
78984959 | 2733 | converted_reloc = (r_type & R_X86_64_converted_reloc_bit) != 0; |
b638b5d5 L |
2734 | if (converted_reloc) |
2735 | { | |
2736 | r_type &= ~R_X86_64_converted_reloc_bit; | |
2737 | rel->r_info = htab->r_info (r_symndx, r_type); | |
2738 | } | |
78984959 | 2739 | |
76268e02 L |
2740 | howto = elf_x86_64_rtype_to_howto (input_bfd, r_type); |
2741 | if (howto == NULL) | |
47aeb64c | 2742 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
8d88c4ca | 2743 | |
8d88c4ca NC |
2744 | h = NULL; |
2745 | sym = NULL; | |
2746 | sec = NULL; | |
0a1b45a2 | 2747 | unresolved_reloc = false; |
8d88c4ca | 2748 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
2749 | { |
2750 | sym = local_syms + r_symndx; | |
2751 | sec = local_sections[r_symndx]; | |
c434dee6 | 2752 | |
c25bc9fc L |
2753 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
2754 | &sec, rel); | |
1788fc08 | 2755 | st_size = sym->st_size; |
c25bc9fc L |
2756 | |
2757 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 2758 | if (!bfd_link_relocatable (info) |
351f65ca | 2759 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 2760 | { |
0afcef53 | 2761 | h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, |
0a1b45a2 | 2762 | rel, false); |
c25bc9fc L |
2763 | if (h == NULL) |
2764 | abort (); | |
2765 | ||
eed180f8 | 2766 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
2767 | h->root.u.def.value = sym->st_value; |
2768 | h->root.u.def.section = sec; | |
2769 | } | |
8da6118f | 2770 | } |
8d88c4ca | 2771 | else |
8da6118f | 2772 | { |
0a1b45a2 AM |
2773 | bool warned ATTRIBUTE_UNUSED; |
2774 | bool ignored ATTRIBUTE_UNUSED; | |
c434dee6 | 2775 | |
b2a8e766 AM |
2776 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2777 | r_symndx, symtab_hdr, sym_hashes, | |
2778 | h, sec, relocation, | |
62d887d4 | 2779 | unresolved_reloc, warned, ignored); |
1788fc08 | 2780 | st_size = h->size; |
8da6118f | 2781 | } |
ab96bf03 | 2782 | |
dbaa2011 | 2783 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
2784 | { |
2785 | _bfd_clear_contents (howto, input_bfd, input_section, | |
0930cb30 | 2786 | contents, rel->r_offset); |
60f2e42e L |
2787 | wrel->r_offset = rel->r_offset; |
2788 | wrel->r_info = 0; | |
2789 | wrel->r_addend = 0; | |
2790 | ||
2791 | /* For ld -r, remove relocations in debug sections against | |
2792 | sections defined in discarded sections. Not done for | |
2793 | eh_frame editing code expects to be present. */ | |
2794 | if (bfd_link_relocatable (info) | |
2795 | && (input_section->flags & SEC_DEBUGGING)) | |
2796 | wrel--; | |
2797 | ||
2798 | continue; | |
2799 | } | |
ab96bf03 | 2800 | |
0e1862bb | 2801 | if (bfd_link_relocatable (info)) |
2d5da473 L |
2802 | { |
2803 | if (wrel != rel) | |
2804 | *wrel = *rel; | |
2805 | continue; | |
2806 | } | |
ab96bf03 | 2807 | |
1788fc08 | 2808 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 2809 | { |
1788fc08 L |
2810 | if (r_type == R_X86_64_64) |
2811 | { | |
2812 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
2813 | zero-extend it to 64bit if addend is zero. */ | |
2814 | r_type = R_X86_64_32; | |
2815 | memset (contents + rel->r_offset + 4, 0, 4); | |
2816 | } | |
2817 | else if (r_type == R_X86_64_SIZE64) | |
2818 | { | |
2819 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
2820 | zero-extend it to 64bit if addend is zero. */ | |
2821 | r_type = R_X86_64_SIZE32; | |
2822 | memset (contents + rel->r_offset + 4, 0, 4); | |
2823 | } | |
64d25c44 L |
2824 | } |
2825 | ||
0afcef53 | 2826 | eh = (struct elf_x86_link_hash_entry *) h; |
0ff2b86e | 2827 | |
cbe950e9 L |
2828 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
2829 | it here if it is defined in a non-shared object. */ | |
2830 | if (h != NULL | |
2831 | && h->type == STT_GNU_IFUNC | |
2832 | && h->def_regular) | |
2833 | { | |
cbe950e9 | 2834 | bfd_vma plt_index; |
4c544807 | 2835 | const char *name; |
cbe950e9 | 2836 | |
97dc35c8 L |
2837 | if ((input_section->flags & SEC_ALLOC) == 0) |
2838 | { | |
347a8774 L |
2839 | /* If this is a SHT_NOTE section without SHF_ALLOC, treat |
2840 | STT_GNU_IFUNC symbol as STT_FUNC. */ | |
2841 | if (elf_section_type (input_section) == SHT_NOTE) | |
2842 | goto skip_ifunc; | |
97dc35c8 L |
2843 | /* Dynamic relocs are not propagated for SEC_DEBUGGING |
2844 | sections because such sections are not SEC_ALLOC and | |
2845 | thus ld.so will not process them. */ | |
2846 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 2847 | continue; |
97dc35c8 L |
2848 | abort (); |
2849 | } | |
233cc9c1 L |
2850 | |
2851 | switch (r_type) | |
2852 | { | |
2853 | default: | |
2854 | break; | |
2855 | ||
2856 | case R_X86_64_GOTPCREL: | |
2857 | case R_X86_64_GOTPCRELX: | |
2858 | case R_X86_64_REX_GOTPCRELX: | |
3d5a60de | 2859 | case R_X86_64_CODE_4_GOTPCRELX: |
233cc9c1 L |
2860 | case R_X86_64_GOTPCREL64: |
2861 | base_got = htab->elf.sgot; | |
2862 | off = h->got.offset; | |
2863 | ||
2864 | if (base_got == NULL) | |
2865 | abort (); | |
2866 | ||
2867 | if (off == (bfd_vma) -1) | |
2868 | { | |
2869 | /* We can't use h->got.offset here to save state, or | |
2870 | even just remember the offset, as finish_dynamic_symbol | |
2871 | would use that as offset into .got. */ | |
2872 | ||
2873 | if (h->plt.offset == (bfd_vma) -1) | |
2874 | abort (); | |
2875 | ||
2876 | if (htab->elf.splt != NULL) | |
2877 | { | |
38b12349 | 2878 | plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2879 | - htab->plt.has_plt0); |
233cc9c1 L |
2880 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
2881 | base_got = htab->elf.sgotplt; | |
2882 | } | |
2883 | else | |
2884 | { | |
2885 | plt_index = h->plt.offset / plt_entry_size; | |
2886 | off = plt_index * GOT_ENTRY_SIZE; | |
2887 | base_got = htab->elf.igotplt; | |
2888 | } | |
2889 | ||
2890 | if (h->dynindx == -1 | |
2891 | || h->forced_local | |
2892 | || info->symbolic) | |
2893 | { | |
2894 | /* This references the local defitionion. We must | |
2895 | initialize this entry in the global offset table. | |
2896 | Since the offset must always be a multiple of 8, | |
2897 | we use the least significant bit to record | |
2898 | whether we have initialized it already. | |
2899 | ||
2900 | When doing a dynamic link, we create a .rela.got | |
2901 | relocation entry to initialize the value. This | |
2902 | is done in the finish_dynamic_symbol routine. */ | |
2903 | if ((off & 1) != 0) | |
2904 | off &= ~1; | |
2905 | else | |
2906 | { | |
2907 | bfd_put_64 (output_bfd, relocation, | |
2908 | base_got->contents + off); | |
2909 | /* Note that this is harmless for the GOTPLT64 | |
2910 | case, as -1 | 1 still is -1. */ | |
2911 | h->got.offset |= 1; | |
2912 | } | |
2913 | } | |
2914 | } | |
2915 | ||
2916 | relocation = (base_got->output_section->vma | |
2917 | + base_got->output_offset + off); | |
2918 | ||
2919 | goto do_relocation; | |
2920 | } | |
2921 | ||
2922 | if (h->plt.offset == (bfd_vma) -1) | |
2923 | { | |
2924 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
2925 | if (r_type == htab->pointer_r_type | |
2926 | && (input_section->flags & SEC_CODE) == 0) | |
2927 | goto do_ifunc_pointer; | |
2928 | goto bad_ifunc_reloc; | |
2929 | } | |
cbe950e9 L |
2930 | |
2931 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
2932 | if (htab->elf.splt != NULL) |
2933 | { | |
f2c29a16 | 2934 | if (htab->plt_second != NULL) |
0ff2b86e | 2935 | { |
f2c29a16 L |
2936 | resolved_plt = htab->plt_second; |
2937 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
2938 | } |
2939 | else | |
2940 | { | |
2941 | resolved_plt = htab->elf.splt; | |
2942 | plt_offset = h->plt.offset; | |
2943 | } | |
2944 | } | |
2945 | else | |
2946 | { | |
2947 | resolved_plt = htab->elf.iplt; | |
2948 | plt_offset = h->plt.offset; | |
2949 | } | |
2950 | ||
2951 | relocation = (resolved_plt->output_section->vma | |
2952 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
2953 | |
2954 | switch (r_type) | |
2955 | { | |
2956 | default: | |
dc1e8a47 | 2957 | bad_ifunc_reloc: |
4c544807 L |
2958 | if (h->root.root.string) |
2959 | name = h->root.root.string; | |
2960 | else | |
2961 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
2962 | NULL); | |
4eca0228 | 2963 | _bfd_error_handler |
695344c0 | 2964 | /* xgettext:c-format */ |
871b3ab2 | 2965 | (_("%pB: relocation %s against STT_GNU_IFUNC " |
233cc9c1 L |
2966 | "symbol `%s' isn't supported"), input_bfd, |
2967 | howto->name, name); | |
cbe950e9 | 2968 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 2969 | return false; |
cbe950e9 L |
2970 | |
2971 | case R_X86_64_32S: | |
0e1862bb | 2972 | if (bfd_link_pic (info)) |
cbe950e9 | 2973 | abort (); |
710ab287 L |
2974 | goto do_relocation; |
2975 | ||
248775ba L |
2976 | case R_X86_64_32: |
2977 | if (ABI_64_P (output_bfd)) | |
2978 | goto do_relocation; | |
17672001 | 2979 | /* FALLTHROUGH */ |
eed180f8 | 2980 | case R_X86_64_64: |
dc1e8a47 | 2981 | do_ifunc_pointer: |
710ab287 L |
2982 | if (rel->r_addend != 0) |
2983 | { | |
4c544807 L |
2984 | if (h->root.root.string) |
2985 | name = h->root.root.string; | |
2986 | else | |
2987 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
2988 | sym, NULL); | |
4eca0228 | 2989 | _bfd_error_handler |
695344c0 | 2990 | /* xgettext:c-format */ |
871b3ab2 | 2991 | (_("%pB: relocation %s against STT_GNU_IFUNC " |
2dcf00ce AM |
2992 | "symbol `%s' has non-zero addend: %" PRId64), |
2993 | input_bfd, howto->name, name, (int64_t) rel->r_addend); | |
710ab287 | 2994 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 2995 | return false; |
710ab287 L |
2996 | } |
2997 | ||
2998 | /* Generate dynamic relcoation only when there is a | |
233cc9c1 L |
2999 | non-GOT reference in a shared object or there is no |
3000 | PLT. */ | |
3001 | if ((bfd_link_pic (info) && h->non_got_ref) | |
3002 | || h->plt.offset == (bfd_vma) -1) | |
710ab287 L |
3003 | { |
3004 | Elf_Internal_Rela outrel; | |
710ab287 L |
3005 | asection *sreloc; |
3006 | ||
c25bc9fc L |
3007 | /* Need a dynamic relocation to get the real function |
3008 | address. */ | |
710ab287 L |
3009 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
3010 | info, | |
3011 | input_section, | |
3012 | rel->r_offset); | |
3013 | if (outrel.r_offset == (bfd_vma) -1 | |
3014 | || outrel.r_offset == (bfd_vma) -2) | |
3015 | abort (); | |
3016 | ||
3017 | outrel.r_offset += (input_section->output_section->vma | |
3018 | + input_section->output_offset); | |
3019 | ||
cf1070f1 | 3020 | if (POINTER_LOCAL_IFUNC_P (info, h)) |
710ab287 | 3021 | { |
871b3ab2 | 3022 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
3023 | h->root.root.string, |
3024 | h->root.u.def.section->owner); | |
3025 | ||
710ab287 | 3026 | /* This symbol is resolved locally. */ |
56b8aada L |
3027 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
3028 | outrel.r_addend = (h->root.u.def.value | |
3029 | + h->root.u.def.section->output_section->vma | |
3030 | + h->root.u.def.section->output_offset); | |
68b00778 L |
3031 | |
3032 | if (htab->params->report_relative_reloc) | |
3033 | _bfd_x86_elf_link_report_relative_reloc | |
3034 | (info, input_section, h, sym, | |
3035 | "R_X86_64_IRELATIVE", &outrel); | |
710ab287 L |
3036 | } |
3037 | else | |
3038 | { | |
351f65ca | 3039 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
3040 | outrel.r_addend = 0; |
3041 | } | |
3042 | ||
233cc9c1 L |
3043 | /* Dynamic relocations are stored in |
3044 | 1. .rela.ifunc section in PIC object. | |
3045 | 2. .rela.got section in dynamic executable. | |
3046 | 3. .rela.iplt section in static executable. */ | |
3047 | if (bfd_link_pic (info)) | |
3048 | sreloc = htab->elf.irelifunc; | |
3049 | else if (htab->elf.splt != NULL) | |
3050 | sreloc = htab->elf.srelgot; | |
3051 | else | |
3052 | sreloc = htab->elf.irelplt; | |
351f65ca | 3053 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
3054 | |
3055 | /* If this reloc is against an external symbol, we | |
3056 | do not want to fiddle with the addend. Otherwise, | |
3057 | we need to include the symbol value so that it | |
3058 | becomes an addend for the dynamic reloc. For an | |
3059 | internal symbol, we have updated addend. */ | |
56b8aada | 3060 | continue; |
710ab287 | 3061 | } |
17672001 | 3062 | /* FALLTHROUGH */ |
cbe950e9 L |
3063 | case R_X86_64_PC32: |
3064 | case R_X86_64_PC64: | |
3065 | case R_X86_64_PLT32: | |
3066 | goto do_relocation; | |
cbe950e9 L |
3067 | } |
3068 | } | |
3069 | ||
dc1e8a47 | 3070 | skip_ifunc: |
aec6b87e | 3071 | resolved_to_zero = (eh != NULL |
c5bce5c6 | 3072 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh)); |
aec6b87e | 3073 | |
70256ad8 AJ |
3074 | /* When generating a shared object, the relocations handled here are |
3075 | copied into the output file to be resolved at run time. */ | |
3076 | switch (r_type) | |
3077 | { | |
3078 | case R_X86_64_GOT32: | |
7b81dfbb | 3079 | case R_X86_64_GOT64: |
70256ad8 AJ |
3080 | /* Relocation is to the entry for this symbol in the global |
3081 | offset table. */ | |
70256ad8 | 3082 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
3083 | case R_X86_64_GOTPCRELX: |
3084 | case R_X86_64_REX_GOTPCRELX: | |
3d5a60de | 3085 | case R_X86_64_CODE_4_GOTPCRELX: |
7b81dfbb AJ |
3086 | case R_X86_64_GOTPCREL64: |
3087 | /* Use global offset table entry as symbol value. */ | |
3088 | case R_X86_64_GOTPLT64: | |
de194d85 | 3089 | /* This is obsolete and treated the same as GOT64. */ |
6de2ae4a | 3090 | base_got = htab->elf.sgot; |
7b81dfbb | 3091 | |
6de2ae4a | 3092 | if (htab->elf.sgot == NULL) |
c434dee6 | 3093 | abort (); |
053579d7 | 3094 | |
0a1b45a2 | 3095 | relative_reloc = false; |
51e0a107 | 3096 | if (h != NULL) |
70256ad8 | 3097 | { |
c434dee6 | 3098 | off = h->got.offset; |
7b81dfbb | 3099 | if (h->needs_plt |
eed180f8 | 3100 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
3101 | && off == (bfd_vma)-1) |
3102 | { | |
3103 | /* We can't use h->got.offset here to save | |
3104 | state, or even just remember the offset, as | |
3105 | finish_dynamic_symbol would use that as offset into | |
3106 | .got. */ | |
38b12349 | 3107 | bfd_vma plt_index = (h->plt.offset / plt_entry_size |
765e526c | 3108 | - htab->plt.has_plt0); |
7b81dfbb | 3109 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 3110 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
3111 | } |
3112 | ||
2eba97c2 | 3113 | if (RESOLVED_LOCALLY_P (info, h, htab)) |
51e0a107 | 3114 | { |
2eba97c2 L |
3115 | /* We must initialize this entry in the global offset |
3116 | table. Since the offset must always be a multiple | |
3117 | of 8, we use the least significant bit to record | |
3118 | whether we have initialized it already. | |
51e0a107 JH |
3119 | |
3120 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
3121 | relocation entry to initialize the value. This is |
3122 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
3123 | if ((off & 1) != 0) |
3124 | off &= ~1; | |
3125 | else | |
3126 | { | |
3127 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
3128 | base_got->contents + off); |
3129 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 3130 | as -1 | 1 still is -1. */ |
51e0a107 | 3131 | h->got.offset |= 1; |
9e9821dd | 3132 | |
5af6f000 L |
3133 | /* NB: Don't generate relative relocation here if |
3134 | it has been generated by DT_RELR. */ | |
3135 | if (!info->enable_dt_relr | |
3136 | && GENERATE_RELATIVE_RELOC_P (info, h)) | |
9e9821dd L |
3137 | { |
3138 | /* If this symbol isn't dynamic in PIC, | |
3139 | generate R_X86_64_RELATIVE here. */ | |
3140 | eh->no_finish_dynamic_symbol = 1; | |
0a1b45a2 | 3141 | relative_reloc = true; |
9e9821dd | 3142 | } |
51e0a107 JH |
3143 | } |
3144 | } | |
053579d7 | 3145 | else |
0a1b45a2 | 3146 | unresolved_reloc = false; |
70256ad8 | 3147 | } |
51e0a107 JH |
3148 | else |
3149 | { | |
c434dee6 AJ |
3150 | if (local_got_offsets == NULL) |
3151 | abort (); | |
51e0a107 JH |
3152 | |
3153 | off = local_got_offsets[r_symndx]; | |
3154 | ||
3155 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
3156 | the least significant bit to record whether we have |
3157 | already generated the necessary reloc. */ | |
51e0a107 JH |
3158 | if ((off & 1) != 0) |
3159 | off &= ~1; | |
3160 | else | |
3161 | { | |
c434dee6 | 3162 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 3163 | base_got->contents + off); |
9e9821dd | 3164 | local_got_offsets[r_symndx] |= 1; |
51e0a107 | 3165 | |
382aae06 L |
3166 | /* NB: GOTPCREL relocations against local absolute |
3167 | symbol store relocation value in the GOT slot | |
5af6f000 L |
3168 | without relative relocation. Don't generate |
3169 | relative relocation here if it has been generated | |
3170 | by DT_RELR. */ | |
3171 | if (!info->enable_dt_relr | |
3172 | && bfd_link_pic (info) | |
382aae06 L |
3173 | && !(sym->st_shndx == SHN_ABS |
3174 | && (r_type == R_X86_64_GOTPCREL | |
3175 | || r_type == R_X86_64_GOTPCRELX | |
3d5a60de L |
3176 | || r_type == R_X86_64_REX_GOTPCRELX |
3177 | || r_type == R_X86_64_CODE_4_GOTPCRELX))) | |
0a1b45a2 | 3178 | relative_reloc = true; |
51e0a107 | 3179 | } |
51e0a107 | 3180 | } |
6a2bda3f | 3181 | |
9e9821dd L |
3182 | if (relative_reloc) |
3183 | { | |
3184 | asection *s; | |
3185 | Elf_Internal_Rela outrel; | |
3186 | ||
3187 | /* We need to generate a R_X86_64_RELATIVE reloc | |
3188 | for the dynamic linker. */ | |
3189 | s = htab->elf.srelgot; | |
3190 | if (s == NULL) | |
3191 | abort (); | |
3192 | ||
3193 | outrel.r_offset = (base_got->output_section->vma | |
3194 | + base_got->output_offset | |
3195 | + off); | |
3196 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); | |
3197 | outrel.r_addend = relocation; | |
68b00778 L |
3198 | |
3199 | if (htab->params->report_relative_reloc) | |
3200 | _bfd_x86_elf_link_report_relative_reloc | |
3201 | (info, input_section, h, sym, "R_X86_64_RELATIVE", | |
3202 | &outrel); | |
3203 | ||
9e9821dd L |
3204 | elf_append_rela (output_bfd, s, &outrel); |
3205 | } | |
3206 | ||
c434dee6 AJ |
3207 | if (off >= (bfd_vma) -2) |
3208 | abort (); | |
3209 | ||
7b81dfbb AJ |
3210 | relocation = base_got->output_section->vma |
3211 | + base_got->output_offset + off; | |
56ceb5b5 L |
3212 | if (r_type != R_X86_64_GOTPCREL |
3213 | && r_type != R_X86_64_GOTPCRELX | |
3214 | && r_type != R_X86_64_REX_GOTPCRELX | |
3d5a60de | 3215 | && r_type != R_X86_64_CODE_4_GOTPCRELX |
56ceb5b5 | 3216 | && r_type != R_X86_64_GOTPCREL64) |
6de2ae4a L |
3217 | relocation -= htab->elf.sgotplt->output_section->vma |
3218 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 3219 | |
70256ad8 AJ |
3220 | break; |
3221 | ||
d6ab8113 JB |
3222 | case R_X86_64_GOTOFF64: |
3223 | /* Relocation is relative to the start of the global offset | |
3224 | table. */ | |
3225 | ||
3d949995 L |
3226 | /* Check to make sure it isn't a protected function or data |
3227 | symbol for shared library since it may not be local when | |
e3c0e327 L |
3228 | used as function address or with copy relocation. We also |
3229 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 3230 | if (bfd_link_pic (info) && h) |
d6ab8113 | 3231 | { |
e3c0e327 L |
3232 | if (!h->def_regular) |
3233 | { | |
3234 | const char *v; | |
3235 | ||
3236 | switch (ELF_ST_VISIBILITY (h->other)) | |
3237 | { | |
3238 | case STV_HIDDEN: | |
3239 | v = _("hidden symbol"); | |
3240 | break; | |
3241 | case STV_INTERNAL: | |
3242 | v = _("internal symbol"); | |
3243 | break; | |
3244 | case STV_PROTECTED: | |
3245 | v = _("protected symbol"); | |
3246 | break; | |
3247 | default: | |
3248 | v = _("symbol"); | |
3249 | break; | |
3250 | } | |
3251 | ||
4eca0228 | 3252 | _bfd_error_handler |
695344c0 | 3253 | /* xgettext:c-format */ |
871b3ab2 | 3254 | (_("%pB: relocation R_X86_64_GOTOFF64 against undefined %s" |
63a5468a | 3255 | " `%s' can not be used when making a shared object"), |
e3c0e327 L |
3256 | input_bfd, v, h->root.root.string); |
3257 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 3258 | return false; |
e3c0e327 | 3259 | } |
0e1862bb | 3260 | else if (!bfd_link_executable (info) |
6999821f | 3261 | && !SYMBOL_REFERENCES_LOCAL_P (info, h) |
e3c0e327 L |
3262 | && (h->type == STT_FUNC |
3263 | || h->type == STT_OBJECT) | |
3264 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
3265 | { | |
4eca0228 | 3266 | _bfd_error_handler |
da0d12d2 | 3267 | /* xgettext:c-format */ |
871b3ab2 | 3268 | (_("%pB: relocation R_X86_64_GOTOFF64 against protected %s" |
63a5468a | 3269 | " `%s' can not be used when making a shared object"), |
e3c0e327 L |
3270 | input_bfd, |
3271 | h->type == STT_FUNC ? "function" : "data", | |
3272 | h->root.root.string); | |
3273 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 3274 | return false; |
e3c0e327 | 3275 | } |
d6ab8113 JB |
3276 | } |
3277 | ||
3278 | /* Note that sgot is not involved in this | |
3279 | calculation. We always want the start of .got.plt. If we | |
3280 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
3281 | permitted by the ABI, we might have to change this | |
3282 | calculation. */ | |
6de2ae4a L |
3283 | relocation -= htab->elf.sgotplt->output_section->vma |
3284 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3285 | break; |
3286 | ||
3287 | case R_X86_64_GOTPC32: | |
7b81dfbb | 3288 | case R_X86_64_GOTPC64: |
d6ab8113 | 3289 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
3290 | relocation = htab->elf.sgotplt->output_section->vma |
3291 | + htab->elf.sgotplt->output_offset; | |
0a1b45a2 | 3292 | unresolved_reloc = false; |
d6ab8113 | 3293 | break; |
7b81dfbb AJ |
3294 | |
3295 | case R_X86_64_PLTOFF64: | |
3296 | /* Relocation is PLT entry relative to GOT. For local | |
3297 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 3298 | if (h != NULL |
7b81dfbb | 3299 | /* See PLT32 handling. */ |
9d734efa L |
3300 | && (h->plt.offset != (bfd_vma) -1 |
3301 | || eh->plt_got.offset != (bfd_vma) -1) | |
6de2ae4a | 3302 | && htab->elf.splt != NULL) |
7b81dfbb | 3303 | { |
9d734efa L |
3304 | if (eh->plt_got.offset != (bfd_vma) -1) |
3305 | { | |
3306 | /* Use the GOT PLT. */ | |
3307 | resolved_plt = htab->plt_got; | |
3308 | plt_offset = eh->plt_got.offset; | |
3309 | } | |
f2c29a16 | 3310 | else if (htab->plt_second != NULL) |
0ff2b86e | 3311 | { |
f2c29a16 L |
3312 | resolved_plt = htab->plt_second; |
3313 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
3314 | } |
3315 | else | |
3316 | { | |
3317 | resolved_plt = htab->elf.splt; | |
3318 | plt_offset = h->plt.offset; | |
3319 | } | |
3320 | ||
3321 | relocation = (resolved_plt->output_section->vma | |
3322 | + resolved_plt->output_offset | |
3323 | + plt_offset); | |
0a1b45a2 | 3324 | unresolved_reloc = false; |
7b81dfbb AJ |
3325 | } |
3326 | ||
6de2ae4a L |
3327 | relocation -= htab->elf.sgotplt->output_section->vma |
3328 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 3329 | break; |
d6ab8113 | 3330 | |
70256ad8 AJ |
3331 | case R_X86_64_PLT32: |
3332 | /* Relocation is to the entry for this symbol in the | |
3333 | procedure linkage table. */ | |
3334 | ||
3335 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 3336 | without using the procedure linkage table. */ |
70256ad8 AJ |
3337 | if (h == NULL) |
3338 | break; | |
3339 | ||
dd7e64d4 L |
3340 | if ((h->plt.offset == (bfd_vma) -1 |
3341 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 3342 | || htab->elf.splt == NULL) |
70256ad8 AJ |
3343 | { |
3344 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
3345 | happens when statically linking PIC code, or when |
3346 | using -Bsymbolic. */ | |
70256ad8 AJ |
3347 | break; |
3348 | } | |
3349 | ||
dc1e8a47 | 3350 | use_plt: |
dd7e64d4 | 3351 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 3352 | { |
f2c29a16 | 3353 | if (htab->plt_second != NULL) |
dd7e64d4 | 3354 | { |
f2c29a16 L |
3355 | resolved_plt = htab->plt_second; |
3356 | plt_offset = eh->plt_second.offset; | |
dd7e64d4 L |
3357 | } |
3358 | else | |
3359 | { | |
3360 | resolved_plt = htab->elf.splt; | |
3361 | plt_offset = h->plt.offset; | |
3362 | } | |
0ff2b86e L |
3363 | } |
3364 | else | |
3365 | { | |
dd7e64d4 L |
3366 | /* Use the GOT PLT. */ |
3367 | resolved_plt = htab->plt_got; | |
3368 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
3369 | } |
3370 | ||
3371 | relocation = (resolved_plt->output_section->vma | |
3372 | + resolved_plt->output_offset | |
3373 | + plt_offset); | |
0a1b45a2 | 3374 | unresolved_reloc = false; |
70256ad8 AJ |
3375 | break; |
3376 | ||
1788fc08 L |
3377 | case R_X86_64_SIZE32: |
3378 | case R_X86_64_SIZE64: | |
1788fc08 L |
3379 | /* Set to symbol size. */ |
3380 | relocation = st_size; | |
3381 | goto direct; | |
3382 | ||
fd8ab9e5 AJ |
3383 | case R_X86_64_PC8: |
3384 | case R_X86_64_PC16: | |
3385 | case R_X86_64_PC32: | |
81e8046d L |
3386 | /* Don't complain about -fPIC if the symbol is undefined when |
3387 | building executable unless it is unresolved weak symbol, | |
3388 | references a dynamic definition in PIE or -z nocopyreloc | |
3389 | is used. */ | |
3390 | no_copyreloc_p | |
3391 | = (info->nocopyreloc | |
3392 | || (h != NULL | |
3393 | && !h->root.linker_def | |
3394 | && !h->root.ldscript_def | |
f6386577 | 3395 | && eh->def_protected)); |
81e8046d L |
3396 | |
3397 | if ((input_section->flags & SEC_ALLOC) != 0 | |
3398 | && (input_section->flags & SEC_READONLY) != 0 | |
3399 | && h != NULL | |
3400 | && ((bfd_link_executable (info) | |
3401 | && ((h->root.type == bfd_link_hash_undefweak | |
3402 | && (eh == NULL | |
3403 | || !UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, | |
3404 | eh))) | |
3405 | || (bfd_link_pie (info) | |
3406 | && !SYMBOL_DEFINED_NON_SHARED_P (h) | |
3407 | && h->def_dynamic) | |
3408 | || (no_copyreloc_p | |
3409 | && h->def_dynamic | |
3410 | && !(h->root.u.def.section->flags & SEC_CODE)))) | |
661b504d L |
3411 | || (bfd_link_pie (info) |
3412 | && h->root.type == bfd_link_hash_undefweak) | |
81e8046d L |
3413 | || bfd_link_dll (info))) |
3414 | { | |
0a1b45a2 | 3415 | bool fail = false; |
81e8046d L |
3416 | if (SYMBOL_REFERENCES_LOCAL_P (info, h)) |
3417 | { | |
3418 | /* Symbol is referenced locally. Make sure it is | |
3419 | defined locally. */ | |
3420 | fail = !SYMBOL_DEFINED_NON_SHARED_P (h); | |
3421 | } | |
3422 | else if (bfd_link_pie (info)) | |
3423 | { | |
3424 | /* We can only use PC-relative relocations in PIE | |
3425 | from non-code sections. */ | |
661b504d L |
3426 | if (h->root.type == bfd_link_hash_undefweak |
3427 | || (h->type == STT_FUNC | |
3428 | && (sec->flags & SEC_CODE) != 0)) | |
0a1b45a2 | 3429 | fail = true; |
81e8046d L |
3430 | } |
3431 | else if (no_copyreloc_p || bfd_link_dll (info)) | |
3432 | { | |
3433 | /* Symbol doesn't need copy reloc and isn't | |
3434 | referenced locally. Don't allow PC-relative | |
3435 | relocations against default and protected | |
3436 | symbols since address of protected function | |
3437 | and location of protected data may not be in | |
3438 | the shared object. */ | |
3439 | fail = (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3440 | || ELF_ST_VISIBILITY (h->other) == STV_PROTECTED); | |
3441 | } | |
3442 | ||
3443 | if (fail) | |
3444 | return elf_x86_64_need_pic (info, input_bfd, input_section, | |
3445 | h, NULL, NULL, howto); | |
3446 | } | |
451875b4 L |
3447 | /* Since x86-64 has PC-relative PLT, we can use PLT in PIE |
3448 | as function address. */ | |
81e8046d L |
3449 | else if (h != NULL |
3450 | && (input_section->flags & SEC_CODE) == 0 | |
3451 | && bfd_link_pie (info) | |
3452 | && h->type == STT_FUNC | |
3453 | && !h->def_regular | |
3454 | && h->def_dynamic) | |
451875b4 | 3455 | goto use_plt; |
6610a52d L |
3456 | /* Fall through. */ |
3457 | ||
70256ad8 AJ |
3458 | case R_X86_64_8: |
3459 | case R_X86_64_16: | |
3460 | case R_X86_64_32: | |
d6ab8113 | 3461 | case R_X86_64_PC64: |
6b3db546 | 3462 | case R_X86_64_64: |
80643fbc | 3463 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 3464 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 3465 | |
dc1e8a47 | 3466 | direct: |
b1e24c02 | 3467 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
3468 | break; |
3469 | ||
aebcc8ff L |
3470 | need_copy_reloc_in_pie = (bfd_link_pie (info) |
3471 | && h != NULL | |
3472 | && (h->needs_copy | |
3473 | || eh->needs_copy | |
3474 | || (h->root.type | |
3475 | == bfd_link_hash_undefined)) | |
831083d3 L |
3476 | && (X86_PCREL_TYPE_P (true, r_type) |
3477 | || X86_SIZE_TYPE_P (true, | |
3478 | r_type))); | |
aebcc8ff | 3479 | |
831083d3 | 3480 | if (GENERATE_DYNAMIC_RELOCATION_P (true, info, eh, r_type, sec, |
aebcc8ff | 3481 | need_copy_reloc_in_pie, |
0a1b45a2 | 3482 | resolved_to_zero, false)) |
70256ad8 AJ |
3483 | { |
3484 | Elf_Internal_Rela outrel; | |
0a1b45a2 | 3485 | bool skip, relocate; |
5af6f000 | 3486 | bool generate_dynamic_reloc = true; |
c434dee6 | 3487 | asection *sreloc; |
68b00778 | 3488 | const char *relative_reloc_name = NULL; |
70256ad8 AJ |
3489 | |
3490 | /* When generating a shared object, these relocations | |
3491 | are copied into the output file to be resolved at run | |
407443a3 | 3492 | time. */ |
0a1b45a2 AM |
3493 | skip = false; |
3494 | relocate = false; | |
70256ad8 | 3495 | |
c629eae0 JJ |
3496 | outrel.r_offset = |
3497 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 3498 | rel->r_offset); |
c629eae0 | 3499 | if (outrel.r_offset == (bfd_vma) -1) |
0a1b45a2 | 3500 | skip = true; |
0fb19cbc | 3501 | else if (outrel.r_offset == (bfd_vma) -2) |
0a1b45a2 | 3502 | skip = true, relocate = true; |
70256ad8 AJ |
3503 | |
3504 | outrel.r_offset += (input_section->output_section->vma | |
3505 | + input_section->output_offset); | |
3506 | ||
3507 | if (skip) | |
0bb2d96a | 3508 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 3509 | |
831083d3 | 3510 | else if (COPY_INPUT_RELOC_P (true, info, h, r_type)) |
70256ad8 | 3511 | { |
351f65ca | 3512 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 3513 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
3514 | } |
3515 | else | |
3516 | { | |
4c10bbaa L |
3517 | /* This symbol is local, or marked to become local. |
3518 | When relocation overflow check is disabled, we | |
3519 | convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
3520 | if (r_type == htab->pointer_r_type | |
3521 | || (r_type == R_X86_64_32 | |
5b9c07b2 | 3522 | && htab->params->no_reloc_overflow_check)) |
607c0e09 | 3523 | { |
0a1b45a2 | 3524 | relocate = true; |
5af6f000 L |
3525 | /* NB: Don't generate relative relocation here if |
3526 | it has been generated by DT_RELR. */ | |
3527 | if (info->enable_dt_relr) | |
3528 | generate_dynamic_reloc = false; | |
3529 | else | |
3530 | { | |
3531 | outrel.r_info = | |
3532 | htab->r_info (0, R_X86_64_RELATIVE); | |
3533 | outrel.r_addend = relocation + rel->r_addend; | |
3534 | relative_reloc_name = "R_X86_64_RELATIVE"; | |
3535 | } | |
607c0e09 | 3536 | } |
64d25c44 L |
3537 | else if (r_type == R_X86_64_64 |
3538 | && !ABI_64_P (output_bfd)) | |
3539 | { | |
0a1b45a2 | 3540 | relocate = true; |
64d25c44 L |
3541 | outrel.r_info = htab->r_info (0, |
3542 | R_X86_64_RELATIVE64); | |
3543 | outrel.r_addend = relocation + rel->r_addend; | |
68b00778 | 3544 | relative_reloc_name = "R_X86_64_RELATIVE64"; |
8cf0d2dd L |
3545 | /* Check addend overflow. */ |
3546 | if ((outrel.r_addend & 0x80000000) | |
3547 | != (rel->r_addend & 0x80000000)) | |
3548 | { | |
3549 | const char *name; | |
268a8d3a | 3550 | int addend = rel->r_addend; |
8cf0d2dd L |
3551 | if (h && h->root.root.string) |
3552 | name = h->root.root.string; | |
3553 | else | |
3554 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3555 | sym, NULL); | |
d42c267e AM |
3556 | _bfd_error_handler |
3557 | /* xgettext:c-format */ | |
871b3ab2 | 3558 | (_("%pB: addend %s%#x in relocation %s against " |
2dcf00ce AM |
3559 | "symbol `%s' at %#" PRIx64 |
3560 | " in section `%pA' is out of range"), | |
d42c267e | 3561 | input_bfd, addend < 0 ? "-" : "", addend, |
2dcf00ce AM |
3562 | howto->name, name, (uint64_t) rel->r_offset, |
3563 | input_section); | |
8cf0d2dd | 3564 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 3565 | return false; |
8cf0d2dd | 3566 | } |
64d25c44 | 3567 | } |
607c0e09 AS |
3568 | else |
3569 | { | |
3570 | long sindx; | |
3571 | ||
8517fae7 | 3572 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
3573 | sindx = 0; |
3574 | else if (sec == NULL || sec->owner == NULL) | |
3575 | { | |
3576 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 3577 | return false; |
607c0e09 AS |
3578 | } |
3579 | else | |
3580 | { | |
3581 | asection *osec; | |
3582 | ||
74541ad4 AM |
3583 | /* We are turning this relocation into one |
3584 | against a section symbol. It would be | |
3585 | proper to subtract the symbol's value, | |
3586 | osec->vma, from the emitted reloc addend, | |
3587 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
3588 | osec = sec->output_section; |
3589 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
3590 | if (sindx == 0) |
3591 | { | |
3592 | asection *oi = htab->elf.text_index_section; | |
3593 | sindx = elf_section_data (oi)->dynindx; | |
3594 | } | |
3595 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
3596 | } |
3597 | ||
351f65ca | 3598 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
3599 | outrel.r_addend = relocation + rel->r_addend; |
3600 | } | |
70256ad8 AJ |
3601 | } |
3602 | ||
5af6f000 | 3603 | if (generate_dynamic_reloc) |
62d78908 | 3604 | { |
5af6f000 | 3605 | sreloc = elf_section_data (input_section)->sreloc; |
c434dee6 | 3606 | |
5af6f000 L |
3607 | if (sreloc == NULL || sreloc->contents == NULL) |
3608 | { | |
3609 | r = bfd_reloc_notsupported; | |
3610 | goto check_relocation_error; | |
3611 | } | |
68b00778 | 3612 | |
5af6f000 L |
3613 | if (relative_reloc_name |
3614 | && htab->params->report_relative_reloc) | |
3615 | _bfd_x86_elf_link_report_relative_reloc | |
3616 | (info, input_section, h, sym, | |
3617 | relative_reloc_name, &outrel); | |
3618 | ||
3619 | elf_append_rela (output_bfd, sreloc, &outrel); | |
3620 | } | |
70256ad8 AJ |
3621 | |
3622 | /* If this reloc is against an external symbol, we do | |
3623 | not want to fiddle with the addend. Otherwise, we | |
3624 | need to include the symbol value so that it becomes | |
3625 | an addend for the dynamic reloc. */ | |
0f88be7a | 3626 | if (! relocate) |
70256ad8 AJ |
3627 | continue; |
3628 | } | |
3629 | ||
3630 | break; | |
3631 | ||
bffbf940 | 3632 | case R_X86_64_TLSGD: |
67a4f2b7 | 3633 | case R_X86_64_GOTPC32_TLSDESC: |
a533c8df | 3634 | case R_X86_64_CODE_4_GOTPC32_TLSDESC: |
67a4f2b7 | 3635 | case R_X86_64_TLSDESC_CALL: |
bffbf940 | 3636 | case R_X86_64_GOTTPOFF: |
a533c8df | 3637 | case R_X86_64_CODE_4_GOTTPOFF: |
5bc71c2a | 3638 | case R_X86_64_CODE_6_GOTTPOFF: |
bffbf940 JJ |
3639 | tls_type = GOT_UNKNOWN; |
3640 | if (h == NULL && local_got_offsets) | |
0afcef53 | 3641 | tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 3642 | else if (h != NULL) |
0afcef53 | 3643 | tls_type = elf_x86_hash_entry (h)->tls_type; |
142411ca | 3644 | |
419414ea | 3645 | r_type_tls = r_type; |
351f65ca L |
3646 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3647 | input_section, contents, | |
3648 | symtab_hdr, sym_hashes, | |
419414ea | 3649 | &r_type_tls, tls_type, rel, |
0a1b45a2 AM |
3650 | relend, h, r_symndx, true)) |
3651 | return false; | |
bffbf940 | 3652 | |
419414ea | 3653 | if (r_type_tls == R_X86_64_TPOFF32) |
bffbf940 | 3654 | { |
142411ca L |
3655 | bfd_vma roff = rel->r_offset; |
3656 | ||
74d39f70 NC |
3657 | if (roff >= input_section->size) |
3658 | goto corrupt_input; | |
3659 | ||
bffbf940 | 3660 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 3661 | |
419414ea | 3662 | if (r_type == R_X86_64_TLSGD) |
bffbf940 | 3663 | { |
52bc799a | 3664 | /* GD->LE transition. For 64bit, change |
e2cbcd91 L |
3665 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3666 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3667 | or | |
3668 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3669 | .byte 0x66; rex64 | |
3670 | call *__tls_get_addr@GOTPCREL(%rip) | |
3671 | which may be converted to | |
3672 | addr32 call __tls_get_addr | |
52bc799a | 3673 | into: |
e2cbcd91 L |
3674 | movq %fs:0, %rax |
3675 | leaq foo@tpoff(%rax), %rax | |
52bc799a | 3676 | For 32bit, change |
e2cbcd91 L |
3677 | leaq foo@tlsgd(%rip), %rdi |
3678 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3679 | or | |
3680 | leaq foo@tlsgd(%rip), %rdi | |
3681 | .byte 0x66; rex64 | |
3682 | call *__tls_get_addr@GOTPCREL(%rip) | |
3683 | which may be converted to | |
3684 | addr32 call __tls_get_addr | |
52bc799a | 3685 | into: |
e2cbcd91 L |
3686 | movl %fs:0, %eax |
3687 | leaq foo@tpoff(%rax), %rax | |
5c98a14e | 3688 | For largepic, change: |
e2cbcd91 L |
3689 | leaq foo@tlsgd(%rip), %rdi |
3690 | movabsq $__tls_get_addr@pltoff, %rax | |
3691 | addq %r15, %rax | |
3692 | call *%rax | |
5c98a14e | 3693 | into: |
e2cbcd91 L |
3694 | movq %fs:0, %rax |
3695 | leaq foo@tpoff(%rax), %rax | |
3696 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 3697 | int largepic = 0; |
e2cbcd91 | 3698 | if (ABI_64_P (output_bfd)) |
5c98a14e | 3699 | { |
74d39f70 NC |
3700 | if (roff + 5 >= input_section->size) |
3701 | goto corrupt_input; | |
e2cbcd91 L |
3702 | if (contents[roff + 5] == 0xb8) |
3703 | { | |
418d4036 L |
3704 | if (roff < 3 |
3705 | || (roff - 3 + 22) > input_section->size) | |
3706 | { | |
dc1e8a47 | 3707 | corrupt_input: |
418d4036 L |
3708 | info->callbacks->einfo |
3709 | (_("%F%P: corrupt input: %pB\n"), | |
3710 | input_bfd); | |
0a1b45a2 | 3711 | return false; |
418d4036 | 3712 | } |
e2cbcd91 L |
3713 | memcpy (contents + roff - 3, |
3714 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
3715 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
3716 | largepic = 1; | |
3717 | } | |
3718 | else | |
418d4036 L |
3719 | { |
3720 | if (roff < 4 | |
3721 | || (roff - 4 + 16) > input_section->size) | |
3722 | goto corrupt_input; | |
3723 | memcpy (contents + roff - 4, | |
3724 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3725 | 16); | |
3726 | } | |
5c98a14e | 3727 | } |
52bc799a | 3728 | else |
418d4036 L |
3729 | { |
3730 | if (roff < 3 | |
3731 | || (roff - 3 + 15) > input_section->size) | |
3732 | goto corrupt_input; | |
3733 | memcpy (contents + roff - 3, | |
3734 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3735 | 15); | |
3736 | } | |
74d39f70 NC |
3737 | |
3738 | if (roff + 8 + largepic >= input_section->size) | |
3739 | goto corrupt_input; | |
3740 | ||
eb4ff4d6 | 3741 | bfd_put_32 (output_bfd, |
351f65ca | 3742 | elf_x86_64_tpoff (info, relocation), |
5c98a14e | 3743 | contents + roff + 8 + largepic); |
e2cbcd91 L |
3744 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, |
3745 | R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */ | |
bffbf940 | 3746 | rel++; |
60f2e42e | 3747 | wrel++; |
bffbf940 JJ |
3748 | continue; |
3749 | } | |
419414ea | 3750 | else if (r_type == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
3751 | { |
3752 | /* GDesc -> LE transition. | |
3753 | It's originally something like: | |
14470f07 L |
3754 | leaq x@tlsdesc(%rip), %rax <--- LP64 mode. |
3755 | rex leal x@tlsdesc(%rip), %eax <--- X32 mode. | |
67a4f2b7 AO |
3756 | |
3757 | Change it to: | |
14470f07 L |
3758 | movq $x@tpoff, %rax <--- LP64 mode. |
3759 | rex movl $x@tpoff, %eax <--- X32 mode. | |
3760 | */ | |
67a4f2b7 | 3761 | |
c9736ba0 | 3762 | unsigned int val, type; |
67a4f2b7 | 3763 | |
418d4036 L |
3764 | if (roff < 3) |
3765 | goto corrupt_input; | |
67a4f2b7 | 3766 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 3767 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
14470f07 L |
3768 | bfd_put_8 (output_bfd, |
3769 | (type & 0x48) | ((type >> 2) & 1), | |
67a4f2b7 AO |
3770 | contents + roff - 3); |
3771 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
3772 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3773 | contents + roff - 1); | |
eb4ff4d6 | 3774 | bfd_put_32 (output_bfd, |
351f65ca | 3775 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
3776 | contents + roff); |
3777 | continue; | |
3778 | } | |
a533c8df L |
3779 | else if (r_type == R_X86_64_CODE_4_GOTPC32_TLSDESC) |
3780 | { | |
3781 | /* GDesc -> LE transition. | |
3782 | It's originally something like: | |
3783 | lea x@tlsdesc(%rip), %reg | |
3784 | ||
3785 | Change it to: | |
3786 | mov $x@tpoff, %reg | |
3787 | where reg is one of r16 to r31. */ | |
3788 | ||
3789 | unsigned int val, rex2; | |
3790 | unsigned int rex2_mask = REX_R | REX_R << 4; | |
3791 | ||
3792 | if (roff < 4) | |
3793 | goto corrupt_input; | |
3794 | rex2 = bfd_get_8 (input_bfd, contents + roff - 3); | |
3795 | val = bfd_get_8 (input_bfd, contents + roff - 1); | |
3796 | /* Move the R bits to the B bits in REX2 payload | |
3797 | byte. */ | |
3798 | bfd_put_8 (output_bfd, | |
3799 | ((rex2 & ~rex2_mask) | |
3800 | | (rex2 & rex2_mask) >> 2), | |
3801 | contents + roff - 3); | |
3802 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
3803 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3804 | contents + roff - 1); | |
3805 | bfd_put_32 (output_bfd, | |
3806 | elf_x86_64_tpoff (info, relocation), | |
3807 | contents + roff); | |
3808 | continue; | |
3809 | } | |
419414ea | 3810 | else if (r_type == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
3811 | { |
3812 | /* GDesc -> LE transition. | |
3813 | It's originally: | |
14470f07 L |
3814 | call *(%rax) <--- LP64 mode. |
3815 | call *(%eax) <--- X32 mode. | |
67a4f2b7 | 3816 | Turn it into: |
14470f07 L |
3817 | xchg %ax,%ax <-- LP64 mode. |
3818 | nopl (%rax) <-- X32 mode. | |
3819 | */ | |
3820 | unsigned int prefix = 0; | |
3821 | if (!ABI_64_P (input_bfd)) | |
3822 | { | |
3823 | /* Check for call *x@tlsdesc(%eax). */ | |
3824 | if (contents[roff] == 0x67) | |
3825 | prefix = 1; | |
3826 | } | |
3827 | if (prefix) | |
3828 | { | |
74d39f70 NC |
3829 | if (roff + 2 >= input_section->size) |
3830 | goto corrupt_input; | |
3831 | ||
14470f07 L |
3832 | bfd_put_8 (output_bfd, 0x0f, contents + roff); |
3833 | bfd_put_8 (output_bfd, 0x1f, contents + roff + 1); | |
3834 | bfd_put_8 (output_bfd, 0x00, contents + roff + 2); | |
3835 | } | |
3836 | else | |
3837 | { | |
74d39f70 NC |
3838 | if (roff + 1 >= input_section->size) |
3839 | goto corrupt_input; | |
3840 | ||
14470f07 L |
3841 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
3842 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
3843 | } | |
67a4f2b7 AO |
3844 | continue; |
3845 | } | |
419414ea | 3846 | else if (r_type == R_X86_64_GOTTPOFF) |
bffbf940 | 3847 | { |
bffbf940 | 3848 | /* IE->LE transition: |
cf61b747 | 3849 | For 64bit, originally it can be one of: |
bffbf940 JJ |
3850 | movq foo@gottpoff(%rip), %reg |
3851 | addq foo@gottpoff(%rip), %reg | |
3852 | We change it into: | |
3853 | movq $foo, %reg | |
3854 | leaq foo(%reg), %reg | |
cf61b747 L |
3855 | addq $foo, %reg. |
3856 | For 32bit, originally it can be one of: | |
3857 | movq foo@gottpoff(%rip), %reg | |
3858 | addl foo@gottpoff(%rip), %reg | |
3859 | We change it into: | |
3860 | movq $foo, %reg | |
3861 | leal foo(%reg), %reg | |
3862 | addl $foo, %reg. */ | |
142411ca L |
3863 | |
3864 | unsigned int val, type, reg; | |
3865 | ||
cf61b747 L |
3866 | if (roff >= 3) |
3867 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
3868 | else | |
418d4036 L |
3869 | { |
3870 | if (roff < 2) | |
3871 | goto corrupt_input; | |
3872 | val = 0; | |
3873 | } | |
142411ca L |
3874 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
3875 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 3876 | reg >>= 3; |
bffbf940 JJ |
3877 | if (type == 0x8b) |
3878 | { | |
3879 | /* movq */ | |
3880 | if (val == 0x4c) | |
418d4036 L |
3881 | { |
3882 | if (roff < 3) | |
3883 | goto corrupt_input; | |
3884 | bfd_put_8 (output_bfd, 0x49, | |
3885 | contents + roff - 3); | |
3886 | } | |
4a4c5f25 | 3887 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
418d4036 L |
3888 | { |
3889 | if (roff < 3) | |
3890 | goto corrupt_input; | |
3891 | bfd_put_8 (output_bfd, 0x41, | |
3892 | contents + roff - 3); | |
3893 | } | |
bffbf940 | 3894 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 3895 | contents + roff - 2); |
bffbf940 | 3896 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3897 | contents + roff - 1); |
bffbf940 JJ |
3898 | } |
3899 | else if (reg == 4) | |
3900 | { | |
cf61b747 L |
3901 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
3902 | is special */ | |
bffbf940 | 3903 | if (val == 0x4c) |
418d4036 L |
3904 | { |
3905 | if (roff < 3) | |
3906 | goto corrupt_input; | |
3907 | bfd_put_8 (output_bfd, 0x49, | |
3908 | contents + roff - 3); | |
3909 | } | |
4a4c5f25 | 3910 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
418d4036 L |
3911 | { |
3912 | if (roff < 3) | |
3913 | goto corrupt_input; | |
3914 | bfd_put_8 (output_bfd, 0x41, | |
3915 | contents + roff - 3); | |
3916 | } | |
bffbf940 | 3917 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 3918 | contents + roff - 2); |
bffbf940 | 3919 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3920 | contents + roff - 1); |
bffbf940 JJ |
3921 | } |
3922 | else | |
3923 | { | |
cf61b747 | 3924 | /* addq/addl -> leaq/leal */ |
bffbf940 | 3925 | if (val == 0x4c) |
418d4036 L |
3926 | { |
3927 | if (roff < 3) | |
3928 | goto corrupt_input; | |
3929 | bfd_put_8 (output_bfd, 0x4d, | |
3930 | contents + roff - 3); | |
3931 | } | |
4a4c5f25 | 3932 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
418d4036 L |
3933 | { |
3934 | if (roff < 3) | |
3935 | goto corrupt_input; | |
3936 | bfd_put_8 (output_bfd, 0x45, | |
3937 | contents + roff - 3); | |
3938 | } | |
bffbf940 | 3939 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 3940 | contents + roff - 2); |
bffbf940 | 3941 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 3942 | contents + roff - 1); |
bffbf940 | 3943 | } |
eb4ff4d6 | 3944 | bfd_put_32 (output_bfd, |
351f65ca | 3945 | elf_x86_64_tpoff (info, relocation), |
142411ca | 3946 | contents + roff); |
bffbf940 JJ |
3947 | continue; |
3948 | } | |
a533c8df L |
3949 | else if (r_type == R_X86_64_CODE_4_GOTTPOFF) |
3950 | { | |
3951 | /* IE->LE transition: | |
3952 | Originally it can be one of: | |
3953 | mov foo@gottpoff(%rip), %reg | |
3954 | add foo@gottpoff(%rip), %reg | |
3955 | We change it into: | |
3956 | mov $foo@tpoff, %reg | |
3957 | add $foo@tpoff, %reg | |
3958 | where reg is one of r16 to r31. */ | |
3959 | ||
3960 | unsigned int rex2, type, reg; | |
3961 | unsigned int rex2_mask = REX_R | REX_R << 4; | |
3962 | ||
3963 | if (roff < 4) | |
3964 | goto corrupt_input; | |
3965 | ||
3966 | rex2 = bfd_get_8 (input_bfd, contents + roff - 3); | |
3967 | type = bfd_get_8 (input_bfd, contents + roff - 2); | |
3968 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
3969 | reg >>= 3; | |
3970 | /* Move the R bits to the B bits in REX2 payload | |
3971 | byte. */ | |
3972 | if (type == 0x8b) | |
3973 | type = 0xc7; | |
3974 | else | |
3975 | type = 0x81; | |
3976 | bfd_put_8 (output_bfd, | |
3977 | ((rex2 & ~rex2_mask) | |
3978 | | (rex2 & rex2_mask) >> 2), | |
3979 | contents + roff - 3); | |
3980 | bfd_put_8 (output_bfd, type, | |
3981 | contents + roff - 2); | |
3982 | bfd_put_8 (output_bfd, 0xc0 | reg, | |
3983 | contents + roff - 1); | |
3984 | bfd_put_32 (output_bfd, | |
3985 | elf_x86_64_tpoff (info, relocation), | |
3986 | contents + roff); | |
3987 | continue; | |
3988 | } | |
5bc71c2a L |
3989 | else if (r_type == R_X86_64_CODE_6_GOTTPOFF) |
3990 | { | |
3991 | /* IE->LE transition: | |
3992 | Originally it is | |
3993 | add %reg1, foo@gottpoff(%rip), %reg2 | |
3994 | or | |
3995 | add foo@gottpoff(%rip), %reg1, %reg2 | |
3996 | We change it into: | |
3997 | add $foo@tpoff, %reg1, %reg2 | |
3998 | */ | |
3999 | unsigned int reg, byte1; | |
4000 | unsigned int updated_byte1; | |
4001 | ||
4002 | if (roff < 6) | |
4003 | goto corrupt_input; | |
4004 | ||
4005 | /* Move the R bits to the B bits in EVEX payload | |
4006 | byte 1. */ | |
4007 | byte1 = bfd_get_8 (input_bfd, contents + roff - 5); | |
4008 | updated_byte1 = byte1; | |
4009 | ||
4010 | /* Set the R bits since they is inverted. */ | |
4011 | updated_byte1 |= 1 << 7 | 1 << 4; | |
4012 | ||
4013 | /* Update the B bits from the R bits. */ | |
4014 | if ((byte1 & (1 << 7)) == 0) | |
4015 | updated_byte1 &= ~(1 << 5); | |
4016 | if ((byte1 & (1 << 4)) == 0) | |
4017 | updated_byte1 |= 1 << 3; | |
4018 | ||
4019 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
4020 | reg >>= 3; | |
4021 | ||
4022 | bfd_put_8 (output_bfd, updated_byte1, | |
4023 | contents + roff - 5); | |
4024 | bfd_put_8 (output_bfd, 0x81, | |
4025 | contents + roff - 2); | |
4026 | bfd_put_8 (output_bfd, 0xc0 | reg, | |
4027 | contents + roff - 1); | |
4028 | bfd_put_32 (output_bfd, | |
4029 | elf_x86_64_tpoff (info, relocation), | |
4030 | contents + roff); | |
4031 | continue; | |
4032 | } | |
142411ca | 4033 | else |
0a1b45a2 | 4034 | BFD_ASSERT (false); |
bffbf940 JJ |
4035 | } |
4036 | ||
6de2ae4a | 4037 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
4038 | abort (); |
4039 | ||
4040 | if (h != NULL) | |
67a4f2b7 AO |
4041 | { |
4042 | off = h->got.offset; | |
0afcef53 | 4043 | offplt = elf_x86_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 4044 | } |
bffbf940 JJ |
4045 | else |
4046 | { | |
4047 | if (local_got_offsets == NULL) | |
4048 | abort (); | |
4049 | ||
4050 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 4051 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
4052 | } |
4053 | ||
4054 | if ((off & 1) != 0) | |
4055 | off &= ~1; | |
26e41594 | 4056 | else |
bffbf940 JJ |
4057 | { |
4058 | Elf_Internal_Rela outrel; | |
bffbf940 | 4059 | int dr_type, indx; |
67a4f2b7 | 4060 | asection *sreloc; |
bffbf940 | 4061 | |
6de2ae4a | 4062 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
4063 | abort (); |
4064 | ||
67a4f2b7 AO |
4065 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4066 | ||
4067 | if (GOT_TLS_GDESC_P (tls_type)) | |
4068 | { | |
351f65ca | 4069 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 4070 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
4071 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
4072 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4073 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4074 | + offplt |
4075 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4076 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4077 | if (indx == 0) |
0afcef53 | 4078 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
67a4f2b7 AO |
4079 | else |
4080 | outrel.r_addend = 0; | |
351f65ca | 4081 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
4082 | } |
4083 | ||
6de2ae4a | 4084 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4085 | |
6de2ae4a L |
4086 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4087 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 4088 | |
67a4f2b7 | 4089 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 4090 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
4091 | else if (GOT_TLS_GDESC_P (tls_type)) |
4092 | goto dr_done; | |
bffbf940 JJ |
4093 | else |
4094 | dr_type = R_X86_64_TPOFF64; | |
4095 | ||
6de2ae4a | 4096 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 4097 | outrel.r_addend = 0; |
67a4f2b7 AO |
4098 | if ((dr_type == R_X86_64_TPOFF64 |
4099 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
0afcef53 | 4100 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
351f65ca | 4101 | outrel.r_info = htab->r_info (indx, dr_type); |
bffbf940 | 4102 | |
351f65ca | 4103 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 4104 | |
67a4f2b7 | 4105 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
4106 | { |
4107 | if (indx == 0) | |
4108 | { | |
d40d037c | 4109 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 4110 | bfd_put_64 (output_bfd, |
0afcef53 | 4111 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 4112 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
4113 | } |
4114 | else | |
4115 | { | |
4116 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 4117 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 4118 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
4119 | R_X86_64_DTPOFF64); |
4120 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 4121 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 4122 | &outrel); |
bffbf940 JJ |
4123 | } |
4124 | } | |
4125 | ||
67a4f2b7 | 4126 | dr_done: |
bffbf940 JJ |
4127 | if (h != NULL) |
4128 | h->got.offset |= 1; | |
4129 | else | |
4130 | local_got_offsets[r_symndx] |= 1; | |
4131 | } | |
4132 | ||
67a4f2b7 AO |
4133 | if (off >= (bfd_vma) -2 |
4134 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 4135 | abort (); |
419414ea | 4136 | if (r_type_tls == r_type) |
bffbf940 | 4137 | { |
67a4f2b7 | 4138 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
a533c8df | 4139 | || r_type == R_X86_64_CODE_4_GOTPC32_TLSDESC |
67a4f2b7 | 4140 | || r_type == R_X86_64_TLSDESC_CALL) |
6de2ae4a L |
4141 | relocation = htab->elf.sgotplt->output_section->vma |
4142 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4143 | + offplt + htab->sgotplt_jump_table_size; |
4144 | else | |
6de2ae4a L |
4145 | relocation = htab->elf.sgot->output_section->vma |
4146 | + htab->elf.sgot->output_offset + off; | |
0a1b45a2 | 4147 | unresolved_reloc = false; |
bffbf940 | 4148 | } |
142411ca | 4149 | else |
67a4f2b7 | 4150 | { |
142411ca | 4151 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 4152 | |
419414ea | 4153 | if (r_type == R_X86_64_TLSGD) |
142411ca | 4154 | { |
52bc799a | 4155 | /* GD->IE transition. For 64bit, change |
e2cbcd91 L |
4156 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
4157 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
4158 | or | |
4159 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
4160 | .byte 0x66; rex64 | |
4161 | call *__tls_get_addr@GOTPCREL(%rip | |
4162 | which may be converted to | |
4163 | addr32 call __tls_get_addr | |
52bc799a | 4164 | into: |
e2cbcd91 L |
4165 | movq %fs:0, %rax |
4166 | addq foo@gottpoff(%rip), %rax | |
52bc799a | 4167 | For 32bit, change |
e2cbcd91 L |
4168 | leaq foo@tlsgd(%rip), %rdi |
4169 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
4170 | or | |
4171 | leaq foo@tlsgd(%rip), %rdi | |
4172 | .byte 0x66; rex64; | |
4173 | call *__tls_get_addr@GOTPCREL(%rip) | |
4174 | which may be converted to | |
4175 | addr32 call __tls_get_addr | |
52bc799a | 4176 | into: |
e2cbcd91 L |
4177 | movl %fs:0, %eax |
4178 | addq foo@gottpoff(%rip), %rax | |
5c98a14e | 4179 | For largepic, change: |
e2cbcd91 L |
4180 | leaq foo@tlsgd(%rip), %rdi |
4181 | movabsq $__tls_get_addr@pltoff, %rax | |
4182 | addq %r15, %rax | |
4183 | call *%rax | |
5c98a14e | 4184 | into: |
e2cbcd91 L |
4185 | movq %fs:0, %rax |
4186 | addq foo@gottpoff(%rax), %rax | |
4187 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 4188 | int largepic = 0; |
e2cbcd91 | 4189 | if (ABI_64_P (output_bfd)) |
5c98a14e | 4190 | { |
e2cbcd91 L |
4191 | if (contents[roff + 5] == 0xb8) |
4192 | { | |
418d4036 L |
4193 | if (roff < 3 |
4194 | || (roff - 3 + 22) > input_section->size) | |
4195 | goto corrupt_input; | |
e2cbcd91 L |
4196 | memcpy (contents + roff - 3, |
4197 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
4198 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
4199 | largepic = 1; | |
4200 | } | |
4201 | else | |
418d4036 L |
4202 | { |
4203 | if (roff < 4 | |
4204 | || (roff - 4 + 16) > input_section->size) | |
4205 | goto corrupt_input; | |
4206 | memcpy (contents + roff - 4, | |
4207 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
4208 | 16); | |
4209 | } | |
5c98a14e | 4210 | } |
52bc799a | 4211 | else |
418d4036 L |
4212 | { |
4213 | if (roff < 3 | |
4214 | || (roff - 3 + 15) > input_section->size) | |
4215 | goto corrupt_input; | |
4216 | memcpy (contents + roff - 3, | |
4217 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
4218 | 15); | |
4219 | } | |
142411ca | 4220 | |
6de2ae4a L |
4221 | relocation = (htab->elf.sgot->output_section->vma |
4222 | + htab->elf.sgot->output_offset + off | |
142411ca | 4223 | - roff |
5c98a14e | 4224 | - largepic |
142411ca L |
4225 | - input_section->output_section->vma |
4226 | - input_section->output_offset | |
4227 | - 12); | |
4228 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
4229 | contents + roff + 8 + largepic); |
4230 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 4231 | rel++; |
60f2e42e | 4232 | wrel++; |
142411ca L |
4233 | continue; |
4234 | } | |
a533c8df L |
4235 | else if (r_type == R_X86_64_GOTPC32_TLSDESC |
4236 | || r_type == R_X86_64_CODE_4_GOTPC32_TLSDESC) | |
142411ca L |
4237 | { |
4238 | /* GDesc -> IE transition. | |
4239 | It's originally something like: | |
14470f07 L |
4240 | leaq x@tlsdesc(%rip), %rax <--- LP64 mode. |
4241 | rex leal x@tlsdesc(%rip), %eax <--- X32 mode. | |
67a4f2b7 | 4242 | |
142411ca | 4243 | Change it to: |
14470f07 L |
4244 | # before xchg %ax,%ax in LP64 mode. |
4245 | movq x@gottpoff(%rip), %rax | |
4246 | # before nopl (%rax) in X32 mode. | |
4247 | rex movl x@gottpoff(%rip), %eax | |
4248 | */ | |
67a4f2b7 | 4249 | |
142411ca | 4250 | /* Now modify the instruction as appropriate. To |
14470f07 | 4251 | turn a lea into a mov in the form we use it, it |
142411ca L |
4252 | suffices to change the second byte from 0x8d to |
4253 | 0x8b. */ | |
418d4036 L |
4254 | if (roff < 2) |
4255 | goto corrupt_input; | |
142411ca L |
4256 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); |
4257 | ||
4258 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4259 | htab->elf.sgot->output_section->vma |
4260 | + htab->elf.sgot->output_offset + off | |
142411ca L |
4261 | - rel->r_offset |
4262 | - input_section->output_section->vma | |
4263 | - input_section->output_offset | |
4264 | - 4, | |
4265 | contents + roff); | |
4266 | continue; | |
4267 | } | |
419414ea | 4268 | else if (r_type == R_X86_64_TLSDESC_CALL) |
142411ca L |
4269 | { |
4270 | /* GDesc -> IE transition. | |
4271 | It's originally: | |
14470f07 L |
4272 | call *(%rax) <--- LP64 mode. |
4273 | call *(%eax) <--- X32 mode. | |
142411ca L |
4274 | |
4275 | Change it to: | |
14470f07 L |
4276 | xchg %ax, %ax <-- LP64 mode. |
4277 | nopl (%rax) <-- X32 mode. | |
4278 | */ | |
142411ca | 4279 | |
14470f07 L |
4280 | unsigned int prefix = 0; |
4281 | if (!ABI_64_P (input_bfd)) | |
4282 | { | |
4283 | /* Check for call *x@tlsdesc(%eax). */ | |
4284 | if (contents[roff] == 0x67) | |
4285 | prefix = 1; | |
4286 | } | |
4287 | if (prefix) | |
4288 | { | |
4289 | bfd_put_8 (output_bfd, 0x0f, contents + roff); | |
4290 | bfd_put_8 (output_bfd, 0x1f, contents + roff + 1); | |
4291 | bfd_put_8 (output_bfd, 0x00, contents + roff + 2); | |
4292 | } | |
4293 | else | |
4294 | { | |
4295 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
4296 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
4297 | } | |
142411ca L |
4298 | continue; |
4299 | } | |
4300 | else | |
0a1b45a2 | 4301 | BFD_ASSERT (false); |
67a4f2b7 | 4302 | } |
bffbf940 JJ |
4303 | break; |
4304 | ||
4305 | case R_X86_64_TLSLD: | |
351f65ca L |
4306 | if (! elf_x86_64_tls_transition (info, input_bfd, |
4307 | input_section, contents, | |
4308 | symtab_hdr, sym_hashes, | |
bedfd056 | 4309 | &r_type, GOT_UNKNOWN, rel, |
0a1b45a2 AM |
4310 | relend, h, r_symndx, true)) |
4311 | return false; | |
a3fadc9a | 4312 | |
142411ca L |
4313 | if (r_type != R_X86_64_TLSLD) |
4314 | { | |
bffbf940 | 4315 | /* LD->LE transition: |
e2cbcd91 L |
4316 | leaq foo@tlsld(%rip), %rdi |
4317 | call __tls_get_addr@PLT | |
4318 | For 64bit, we change it into: | |
4319 | .word 0x6666; .byte 0x66; movq %fs:0, %rax | |
4320 | For 32bit, we change it into: | |
4321 | nopl 0x0(%rax); movl %fs:0, %eax | |
4322 | Or | |
4323 | leaq foo@tlsld(%rip), %rdi; | |
4324 | call *__tls_get_addr@GOTPCREL(%rip) | |
4325 | which may be converted to | |
4326 | addr32 call __tls_get_addr | |
52bc799a | 4327 | For 64bit, we change it into: |
e2cbcd91 | 4328 | .word 0x6666; .word 0x6666; movq %fs:0, %rax |
52bc799a | 4329 | For 32bit, we change it into: |
e2cbcd91 | 4330 | nopw 0x0(%rax); movl %fs:0, %eax |
5c98a14e | 4331 | For largepic, change: |
e2cbcd91 L |
4332 | leaq foo@tlsgd(%rip), %rdi |
4333 | movabsq $__tls_get_addr@pltoff, %rax | |
4334 | addq %rbx, %rax | |
4335 | call *%rax | |
4336 | into | |
4337 | data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
4338 | movq %fs:0, %eax */ | |
142411ca L |
4339 | |
4340 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
e2cbcd91 L |
4341 | if (ABI_64_P (output_bfd)) |
4342 | { | |
418d4036 L |
4343 | if ((rel->r_offset + 5) >= input_section->size) |
4344 | goto corrupt_input; | |
e2cbcd91 | 4345 | if (contents[rel->r_offset + 5] == 0xb8) |
418d4036 L |
4346 | { |
4347 | if (rel->r_offset < 3 | |
4348 | || (rel->r_offset - 3 + 22) > input_section->size) | |
4349 | goto corrupt_input; | |
4350 | memcpy (contents + rel->r_offset - 3, | |
4351 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
4352 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
4353 | } | |
e2cbcd91 L |
4354 | else if (contents[rel->r_offset + 4] == 0xff |
4355 | || contents[rel->r_offset + 4] == 0x67) | |
418d4036 L |
4356 | { |
4357 | if (rel->r_offset < 3 | |
4358 | || (rel->r_offset - 3 + 13) > input_section->size) | |
4359 | goto corrupt_input; | |
4360 | memcpy (contents + rel->r_offset - 3, | |
4361 | "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", | |
4362 | 13); | |
4363 | ||
4364 | } | |
e2cbcd91 | 4365 | else |
418d4036 L |
4366 | { |
4367 | if (rel->r_offset < 3 | |
4368 | || (rel->r_offset - 3 + 12) > input_section->size) | |
4369 | goto corrupt_input; | |
4370 | memcpy (contents + rel->r_offset - 3, | |
4371 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
4372 | } | |
e2cbcd91 | 4373 | } |
52bc799a | 4374 | else |
e2cbcd91 | 4375 | { |
418d4036 L |
4376 | if ((rel->r_offset + 4) >= input_section->size) |
4377 | goto corrupt_input; | |
e2cbcd91 | 4378 | if (contents[rel->r_offset + 4] == 0xff) |
418d4036 L |
4379 | { |
4380 | if (rel->r_offset < 3 | |
4381 | || (rel->r_offset - 3 + 13) > input_section->size) | |
4382 | goto corrupt_input; | |
4383 | memcpy (contents + rel->r_offset - 3, | |
4384 | "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", | |
4385 | 13); | |
4386 | } | |
e2cbcd91 | 4387 | else |
418d4036 L |
4388 | { |
4389 | if (rel->r_offset < 3 | |
4390 | || (rel->r_offset - 3 + 12) > input_section->size) | |
4391 | goto corrupt_input; | |
4392 | memcpy (contents + rel->r_offset - 3, | |
4393 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
4394 | } | |
e2cbcd91 L |
4395 | } |
4396 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX | |
4397 | and R_X86_64_PLTOFF64. */ | |
bffbf940 | 4398 | rel++; |
60f2e42e | 4399 | wrel++; |
bffbf940 JJ |
4400 | continue; |
4401 | } | |
4402 | ||
6de2ae4a | 4403 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
4404 | abort (); |
4405 | ||
0afcef53 | 4406 | off = htab->tls_ld_or_ldm_got.offset; |
bffbf940 JJ |
4407 | if (off & 1) |
4408 | off &= ~1; | |
4409 | else | |
4410 | { | |
4411 | Elf_Internal_Rela outrel; | |
bffbf940 | 4412 | |
6de2ae4a | 4413 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
4414 | abort (); |
4415 | ||
6de2ae4a L |
4416 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4417 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
4418 | |
4419 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 4420 | htab->elf.sgot->contents + off); |
bffbf940 | 4421 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 4422 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 4423 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 4424 | outrel.r_addend = 0; |
351f65ca | 4425 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 4426 | &outrel); |
0afcef53 | 4427 | htab->tls_ld_or_ldm_got.offset |= 1; |
bffbf940 | 4428 | } |
6de2ae4a L |
4429 | relocation = htab->elf.sgot->output_section->vma |
4430 | + htab->elf.sgot->output_offset + off; | |
0a1b45a2 | 4431 | unresolved_reloc = false; |
bffbf940 JJ |
4432 | break; |
4433 | ||
4434 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
4435 | if (!bfd_link_executable (info) |
4436 | || (input_section->flags & SEC_CODE) == 0) | |
0afcef53 | 4437 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
bffbf940 | 4438 | else |
351f65ca | 4439 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
4440 | break; |
4441 | ||
4442 | case R_X86_64_TPOFF32: | |
6769d501 | 4443 | case R_X86_64_TPOFF64: |
0e1862bb | 4444 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 4445 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
4446 | break; |
4447 | ||
a69ed7f7 L |
4448 | case R_X86_64_DTPOFF64: |
4449 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
0afcef53 | 4450 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
a69ed7f7 L |
4451 | break; |
4452 | ||
70256ad8 AJ |
4453 | default: |
4454 | break; | |
4455 | } | |
8d88c4ca | 4456 | |
239e1f3a AM |
4457 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
4458 | because such sections are not SEC_ALLOC and thus ld.so will | |
4459 | not process them. */ | |
c434dee6 | 4460 | if (unresolved_reloc |
239e1f3a | 4461 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
4462 | && h->def_dynamic) |
4463 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
4464 | rel->r_offset) != (bfd_vma) -1) | |
a040981f | 4465 | { |
7073b5b9 L |
4466 | switch (r_type) |
4467 | { | |
4468 | case R_X86_64_32S: | |
a5b4ee94 | 4469 | sec = h->root.u.def.section; |
f6386577 | 4470 | if ((info->nocopyreloc || eh->def_protected) |
7073b5b9 L |
4471 | && !(h->root.u.def.section->flags & SEC_CODE)) |
4472 | return elf_x86_64_need_pic (info, input_bfd, input_section, | |
4473 | h, NULL, NULL, howto); | |
4474 | /* Fall through. */ | |
4475 | ||
4476 | default: | |
4477 | _bfd_error_handler | |
4478 | /* xgettext:c-format */ | |
2dcf00ce AM |
4479 | (_("%pB(%pA+%#" PRIx64 "): " |
4480 | "unresolvable %s relocation against symbol `%s'"), | |
7073b5b9 L |
4481 | input_bfd, |
4482 | input_section, | |
2dcf00ce | 4483 | (uint64_t) rel->r_offset, |
7073b5b9 L |
4484 | howto->name, |
4485 | h->root.root.string); | |
0a1b45a2 | 4486 | return false; |
7073b5b9 | 4487 | } |
a040981f | 4488 | } |
c434dee6 | 4489 | |
dc1e8a47 | 4490 | do_relocation: |
8d88c4ca | 4491 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
4492 | contents, rel->r_offset, |
4493 | relocation, rel->r_addend); | |
8d88c4ca | 4494 | |
dc1e8a47 | 4495 | check_relocation_error: |
8d88c4ca | 4496 | if (r != bfd_reloc_ok) |
8da6118f | 4497 | { |
c434dee6 AJ |
4498 | const char *name; |
4499 | ||
4500 | if (h != NULL) | |
4501 | name = h->root.root.string; | |
4502 | else | |
8da6118f | 4503 | { |
c434dee6 AJ |
4504 | name = bfd_elf_string_from_elf_section (input_bfd, |
4505 | symtab_hdr->sh_link, | |
4506 | sym->st_name); | |
4507 | if (name == NULL) | |
0a1b45a2 | 4508 | return false; |
c434dee6 | 4509 | if (*name == '\0') |
fd361982 | 4510 | name = bfd_section_name (sec); |
c434dee6 AJ |
4511 | } |
4512 | ||
4513 | if (r == bfd_reloc_overflow) | |
8b43e456 | 4514 | { |
78984959 | 4515 | if (converted_reloc) |
8b43e456 L |
4516 | { |
4517 | info->callbacks->einfo | |
1a2f1b54 L |
4518 | ("%X%H:", input_bfd, input_section, rel->r_offset); |
4519 | info->callbacks->einfo | |
4520 | (_(" failed to convert GOTPCREL relocation against " | |
4521 | "'%s'; relink with --no-relax\n"), | |
4522 | name); | |
0a1b45a2 | 4523 | status = false; |
1a2f1b54 | 4524 | continue; |
8b43e456 L |
4525 | } |
4526 | (*info->callbacks->reloc_overflow) | |
4527 | (info, (h ? &h->root : NULL), name, howto->name, | |
4528 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
4529 | } | |
c434dee6 AJ |
4530 | else |
4531 | { | |
4eca0228 | 4532 | _bfd_error_handler |
695344c0 | 4533 | /* xgettext:c-format */ |
2dcf00ce | 4534 | (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"), |
d003868e | 4535 | input_bfd, input_section, |
2dcf00ce | 4536 | (uint64_t) rel->r_offset, name, (int) r); |
0a1b45a2 | 4537 | return false; |
8da6118f KH |
4538 | } |
4539 | } | |
60f2e42e L |
4540 | |
4541 | if (wrel != rel) | |
4542 | *wrel = *rel; | |
4543 | } | |
4544 | ||
4545 | if (wrel != rel) | |
4546 | { | |
4547 | Elf_Internal_Shdr *rel_hdr; | |
4548 | size_t deleted = rel - wrel; | |
4549 | ||
4550 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
4551 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
4552 | if (rel_hdr->sh_size == 0) | |
4553 | { | |
4554 | /* It is too late to remove an empty reloc section. Leave | |
4555 | one NONE reloc. | |
4556 | ??? What is wrong with an empty section??? */ | |
4557 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
4558 | deleted -= 1; | |
4559 | } | |
4560 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
4561 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
4562 | input_section->reloc_count -= deleted; | |
8d88c4ca | 4563 | } |
70256ad8 | 4564 | |
1a2f1b54 | 4565 | return status; |
70256ad8 AJ |
4566 | } |
4567 | ||
4568 | /* Finish up dynamic symbol handling. We set the contents of various | |
4569 | dynamic sections here. */ | |
4570 | ||
0a1b45a2 | 4571 | static bool |
351f65ca L |
4572 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
4573 | struct bfd_link_info *info, | |
4574 | struct elf_link_hash_entry *h, | |
aec6b87e | 4575 | Elf_Internal_Sym *sym) |
70256ad8 | 4576 | { |
0afcef53 | 4577 | struct elf_x86_link_hash_table *htab; |
0a1b45a2 | 4578 | bool use_plt_second; |
0afcef53 | 4579 | struct elf_x86_link_hash_entry *eh; |
0a1b45a2 | 4580 | bool local_undefweak; |
70256ad8 | 4581 | |
0afcef53 | 4582 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
70256ad8 | 4583 | |
f2c29a16 L |
4584 | /* Use the second PLT section only if there is .plt section. */ |
4585 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
0ff2b86e | 4586 | |
0afcef53 | 4587 | eh = (struct elf_x86_link_hash_entry *) h; |
9e9821dd L |
4588 | if (eh->no_finish_dynamic_symbol) |
4589 | abort (); | |
dd7e64d4 | 4590 | |
aec6b87e L |
4591 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
4592 | resolved undefined weak symbols in executable so that their | |
4593 | references have value 0 at run-time. */ | |
c5bce5c6 | 4594 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); |
aec6b87e | 4595 | |
70256ad8 AJ |
4596 | if (h->plt.offset != (bfd_vma) -1) |
4597 | { | |
70256ad8 | 4598 | bfd_vma plt_index; |
38b12349 | 4599 | bfd_vma got_offset, plt_offset; |
70256ad8 | 4600 | Elf_Internal_Rela rela; |
947216bf | 4601 | bfd_byte *loc; |
0ff2b86e | 4602 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 4603 | const struct elf_backend_data *bed; |
5974eba6 | 4604 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
4605 | |
4606 | /* When building a static executable, use .iplt, .igot.plt and | |
4607 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 4608 | if (htab->elf.splt != NULL) |
cbe950e9 | 4609 | { |
6de2ae4a L |
4610 | plt = htab->elf.splt; |
4611 | gotplt = htab->elf.sgotplt; | |
4612 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
4613 | } |
4614 | else | |
4615 | { | |
6de2ae4a L |
4616 | plt = htab->elf.iplt; |
4617 | gotplt = htab->elf.igotplt; | |
4618 | relplt = htab->elf.irelplt; | |
cbe950e9 | 4619 | } |
70256ad8 | 4620 | |
f3180fa9 | 4621 | VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak) |
70256ad8 AJ |
4622 | |
4623 | /* Get the index in the procedure linkage table which | |
4624 | corresponds to this symbol. This is the index of this symbol | |
4625 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 4626 | first entry in the procedure linkage table is reserved. |
6bbec505 | 4627 | |
cbe950e9 | 4628 | Get the offset into the .got table of the entry that |
407443a3 | 4629 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
4630 | bytes. The first three are reserved for the dynamic linker. |
4631 | ||
4632 | For static executables, we don't reserve anything. */ | |
4633 | ||
6de2ae4a | 4634 | if (plt == htab->elf.splt) |
cbe950e9 | 4635 | { |
765e526c L |
4636 | got_offset = (h->plt.offset / htab->plt.plt_entry_size |
4637 | - htab->plt.has_plt0); | |
e1f98742 | 4638 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
4639 | } |
4640 | else | |
4641 | { | |
765e526c | 4642 | got_offset = h->plt.offset / htab->plt.plt_entry_size; |
e1f98742 | 4643 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 4644 | } |
70256ad8 | 4645 | |
38b12349 | 4646 | /* Fill in the entry in the procedure linkage table. */ |
765e526c L |
4647 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, |
4648 | htab->plt.plt_entry_size); | |
f2c29a16 | 4649 | if (use_plt_second) |
0ff2b86e | 4650 | { |
f2c29a16 | 4651 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
765e526c L |
4652 | htab->non_lazy_plt->plt_entry, |
4653 | htab->non_lazy_plt->plt_entry_size); | |
0ff2b86e | 4654 | |
f2c29a16 L |
4655 | resolved_plt = htab->plt_second; |
4656 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
4657 | } |
4658 | else | |
4659 | { | |
0ff2b86e L |
4660 | resolved_plt = plt; |
4661 | plt_offset = h->plt.offset; | |
4662 | } | |
eed180f8 RM |
4663 | |
4664 | /* Insert the relocation positions of the plt section. */ | |
4665 | ||
4666 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
4667 | subtracting the size of that instruction. */ | |
ab7fede8 L |
4668 | plt_got_pcrel_offset = (gotplt->output_section->vma |
4669 | + gotplt->output_offset | |
4670 | + got_offset | |
4671 | - resolved_plt->output_section->vma | |
4672 | - resolved_plt->output_offset | |
4673 | - plt_offset | |
765e526c | 4674 | - htab->plt.plt_got_insn_size); |
ab7fede8 L |
4675 | |
4676 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 4677 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
695344c0 | 4678 | /* xgettext:c-format */ |
871b3ab2 | 4679 | info->callbacks->einfo (_("%F%pB: PC-relative offset overflow in PLT entry for `%s'\n"), |
ab7fede8 L |
4680 | output_bfd, h->root.root.string); |
4681 | ||
4682 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
38b12349 | 4683 | (resolved_plt->contents + plt_offset |
765e526c | 4684 | + htab->plt.plt_got_offset)); |
cbe950e9 | 4685 | |
653165cc | 4686 | /* Fill in the entry in the global offset table, initially this |
aec6b87e L |
4687 | points to the second part of the PLT entry. Leave the entry |
4688 | as zero for undefined weak symbol in PIE. No PLT relocation | |
4689 | against undefined weak symbol in PIE. */ | |
4690 | if (!local_undefweak) | |
cbe950e9 | 4691 | { |
765e526c | 4692 | if (htab->plt.has_plt0) |
38b12349 L |
4693 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4694 | + plt->output_offset | |
4695 | + h->plt.offset | |
765e526c | 4696 | + htab->lazy_plt->plt_lazy_offset), |
38b12349 | 4697 | gotplt->contents + got_offset); |
aec6b87e L |
4698 | |
4699 | /* Fill in the entry in the .rela.plt section. */ | |
4700 | rela.r_offset = (gotplt->output_section->vma | |
4701 | + gotplt->output_offset | |
4702 | + got_offset); | |
cf1070f1 | 4703 | if (PLT_LOCAL_IFUNC_P (info, h)) |
aec6b87e | 4704 | { |
871b3ab2 | 4705 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
4706 | h->root.root.string, |
4707 | h->root.u.def.section->owner); | |
4708 | ||
aec6b87e L |
4709 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
4710 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
4711 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); | |
4712 | rela.r_addend = (h->root.u.def.value | |
4713 | + h->root.u.def.section->output_section->vma | |
4714 | + h->root.u.def.section->output_offset); | |
68b00778 L |
4715 | |
4716 | if (htab->params->report_relative_reloc) | |
4717 | _bfd_x86_elf_link_report_relative_reloc | |
4718 | (info, relplt, h, sym, "R_X86_64_IRELATIVE", &rela); | |
4719 | ||
aec6b87e L |
4720 | /* R_X86_64_IRELATIVE comes last. */ |
4721 | plt_index = htab->next_irelative_index--; | |
4722 | } | |
4723 | else | |
4724 | { | |
4725 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); | |
832ca732 L |
4726 | if (htab->params->mark_plt) |
4727 | rela.r_addend = (resolved_plt->output_section->vma | |
4728 | + plt_offset | |
4729 | + htab->plt.plt_indirect_branch_offset); | |
4730 | else | |
4731 | rela.r_addend = 0; | |
aec6b87e L |
4732 | plt_index = htab->next_jump_slot_index++; |
4733 | } | |
e1f98742 | 4734 | |
38b12349 L |
4735 | /* Don't fill the second and third slots in PLT entry for |
4736 | static executables nor without PLT0. */ | |
765e526c | 4737 | if (plt == htab->elf.splt && htab->plt.has_plt0) |
aec6b87e | 4738 | { |
38b12349 | 4739 | bfd_vma plt0_offset |
765e526c | 4740 | = h->plt.offset + htab->lazy_plt->plt_plt_insn_end; |
aec6b87e L |
4741 | |
4742 | /* Put relocation index. */ | |
4743 | bfd_put_32 (output_bfd, plt_index, | |
4744 | (plt->contents + h->plt.offset | |
765e526c | 4745 | + htab->lazy_plt->plt_reloc_offset)); |
aec6b87e L |
4746 | |
4747 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
4748 | check relocation index for overflow since branch displacement | |
4749 | will overflow first. */ | |
4750 | if (plt0_offset > 0x80000000) | |
695344c0 | 4751 | /* xgettext:c-format */ |
871b3ab2 | 4752 | info->callbacks->einfo (_("%F%pB: branch displacement overflow in PLT entry for `%s'\n"), |
aec6b87e L |
4753 | output_bfd, h->root.root.string); |
4754 | bfd_put_32 (output_bfd, - plt0_offset, | |
38b12349 | 4755 | (plt->contents + h->plt.offset |
765e526c | 4756 | + htab->lazy_plt->plt_plt_offset)); |
aec6b87e | 4757 | } |
351f65ca | 4758 | |
aec6b87e L |
4759 | bed = get_elf_backend_data (output_bfd); |
4760 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
4761 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
4762 | } | |
dd7e64d4 L |
4763 | } |
4764 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
4765 | { | |
38b12349 | 4766 | bfd_vma got_offset, plt_offset; |
dd7e64d4 | 4767 | asection *plt, *got; |
0a1b45a2 | 4768 | bool got_after_plt; |
dd7e64d4 | 4769 | int32_t got_pcrel_offset; |
dd7e64d4 L |
4770 | |
4771 | /* Set the entry in the GOT procedure linkage table. */ | |
4772 | plt = htab->plt_got; | |
4773 | got = htab->elf.sgot; | |
4774 | got_offset = h->got.offset; | |
4775 | ||
4776 | if (got_offset == (bfd_vma) -1 | |
e492d2f8 | 4777 | || (h->type == STT_GNU_IFUNC && h->def_regular) |
dd7e64d4 L |
4778 | || plt == NULL |
4779 | || got == NULL) | |
4780 | abort (); | |
70256ad8 | 4781 | |
38b12349 | 4782 | /* Use the non-lazy PLT entry template for the GOT PLT since they |
dd7e64d4 | 4783 | are the identical. */ |
dd7e64d4 L |
4784 | /* Fill in the entry in the GOT procedure linkage table. */ |
4785 | plt_offset = eh->plt_got.offset; | |
4786 | memcpy (plt->contents + plt_offset, | |
765e526c L |
4787 | htab->non_lazy_plt->plt_entry, |
4788 | htab->non_lazy_plt->plt_entry_size); | |
dd7e64d4 L |
4789 | |
4790 | /* Put offset the PC-relative instruction referring to the GOT | |
4791 | entry, subtracting the size of that instruction. */ | |
4792 | got_pcrel_offset = (got->output_section->vma | |
4793 | + got->output_offset | |
4794 | + got_offset | |
4795 | - plt->output_section->vma | |
4796 | - plt->output_offset | |
4797 | - plt_offset | |
765e526c | 4798 | - htab->non_lazy_plt->plt_got_insn_size); |
dd7e64d4 L |
4799 | |
4800 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
4801 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
4802 | if ((got_after_plt && got_pcrel_offset < 0) | |
4803 | || (!got_after_plt && got_pcrel_offset > 0)) | |
695344c0 | 4804 | /* xgettext:c-format */ |
871b3ab2 | 4805 | info->callbacks->einfo (_("%F%pB: PC-relative offset overflow in GOT PLT entry for `%s'\n"), |
dd7e64d4 L |
4806 | output_bfd, h->root.root.string); |
4807 | ||
4808 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
38b12349 | 4809 | (plt->contents + plt_offset |
765e526c | 4810 | + htab->non_lazy_plt->plt_got_offset)); |
dd7e64d4 L |
4811 | } |
4812 | ||
aec6b87e L |
4813 | if (!local_undefweak |
4814 | && !h->def_regular | |
dd7e64d4 L |
4815 | && (h->plt.offset != (bfd_vma) -1 |
4816 | || eh->plt_got.offset != (bfd_vma) -1)) | |
4817 | { | |
4818 | /* Mark the symbol as undefined, rather than as defined in | |
4819 | the .plt section. Leave the value if there were any | |
4820 | relocations where pointer equality matters (this is a clue | |
4821 | for the dynamic linker, to make function pointer | |
4822 | comparisons work between an application and shared | |
4823 | library), otherwise set it to zero. If a function is only | |
4824 | called from a binary, there is no need to slow down | |
4825 | shared libraries because of that. */ | |
4826 | sym->st_shndx = SHN_UNDEF; | |
4827 | if (!h->pointer_equality_needed) | |
4828 | sym->st_value = 0; | |
70256ad8 AJ |
4829 | } |
4830 | ||
4ec09950 L |
4831 | _bfd_x86_elf_link_fixup_ifunc_symbol (info, htab, h, sym); |
4832 | ||
aec6b87e L |
4833 | /* Don't generate dynamic GOT relocation against undefined weak |
4834 | symbol in executable. */ | |
bffbf940 | 4835 | if (h->got.offset != (bfd_vma) -1 |
0afcef53 L |
4836 | && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h)->tls_type) |
4837 | && elf_x86_hash_entry (h)->tls_type != GOT_TLS_IE | |
aec6b87e | 4838 | && !local_undefweak) |
053579d7 | 4839 | { |
053579d7 | 4840 | Elf_Internal_Rela rela; |
233cc9c1 | 4841 | asection *relgot = htab->elf.srelgot; |
68b00778 | 4842 | const char *relative_reloc_name = NULL; |
5af6f000 | 4843 | bool generate_dynamic_reloc = true; |
053579d7 AJ |
4844 | |
4845 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 4846 | up. */ |
6de2ae4a | 4847 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 4848 | abort (); |
053579d7 | 4849 | |
6de2ae4a L |
4850 | rela.r_offset = (htab->elf.sgot->output_section->vma |
4851 | + htab->elf.sgot->output_offset | |
dc810e39 | 4852 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
4853 | |
4854 | /* If this is a static link, or it is a -Bsymbolic link and the | |
4855 | symbol is defined locally or was forced to be local because | |
4856 | of a version file, we just want to emit a RELATIVE reloc. | |
4857 | The entry in the global offset table will already have been | |
4858 | initialized in the relocate_section function. */ | |
710ab287 | 4859 | if (h->def_regular |
0018b0a3 L |
4860 | && h->type == STT_GNU_IFUNC) |
4861 | { | |
233cc9c1 L |
4862 | if (h->plt.offset == (bfd_vma) -1) |
4863 | { | |
4864 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
4865 | if (htab->elf.splt == NULL) | |
4866 | { | |
4867 | /* use .rel[a].iplt section to store .got relocations | |
4868 | in static executable. */ | |
4869 | relgot = htab->elf.irelplt; | |
4870 | } | |
6999821f | 4871 | if (SYMBOL_REFERENCES_LOCAL_P (info, h)) |
233cc9c1 | 4872 | { |
871b3ab2 | 4873 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
4874 | h->root.root.string, |
4875 | h->root.u.def.section->owner); | |
4876 | ||
233cc9c1 L |
4877 | rela.r_info = htab->r_info (0, |
4878 | R_X86_64_IRELATIVE); | |
4879 | rela.r_addend = (h->root.u.def.value | |
4880 | + h->root.u.def.section->output_section->vma | |
4881 | + h->root.u.def.section->output_offset); | |
68b00778 | 4882 | relative_reloc_name = "R_X86_64_IRELATIVE"; |
233cc9c1 L |
4883 | } |
4884 | else | |
4885 | goto do_glob_dat; | |
4886 | } | |
4887 | else if (bfd_link_pic (info)) | |
710ab287 L |
4888 | { |
4889 | /* Generate R_X86_64_GLOB_DAT. */ | |
4890 | goto do_glob_dat; | |
4891 | } | |
4892 | else | |
4893 | { | |
90d60710 | 4894 | asection *plt; |
aab82f4c | 4895 | bfd_vma plt_offset; |
90d60710 | 4896 | |
710ab287 L |
4897 | if (!h->pointer_equality_needed) |
4898 | abort (); | |
4899 | ||
4900 | /* For non-shared object, we can't use .got.plt, which | |
4901 | contains the real function addres if we need pointer | |
4902 | equality. We load the GOT entry with the PLT entry. */ | |
f2c29a16 | 4903 | if (htab->plt_second != NULL) |
aab82f4c | 4904 | { |
f2c29a16 L |
4905 | plt = htab->plt_second; |
4906 | plt_offset = eh->plt_second.offset; | |
aab82f4c L |
4907 | } |
4908 | else | |
4909 | { | |
4910 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
4911 | plt_offset = h->plt.offset; | |
4912 | } | |
710ab287 L |
4913 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4914 | + plt->output_offset | |
aab82f4c | 4915 | + plt_offset), |
6de2ae4a | 4916 | htab->elf.sgot->contents + h->got.offset); |
0a1b45a2 | 4917 | return true; |
710ab287 | 4918 | } |
0018b0a3 | 4919 | } |
0e1862bb | 4920 | else if (bfd_link_pic (info) |
6999821f | 4921 | && SYMBOL_REFERENCES_LOCAL_P (info, h)) |
053579d7 | 4922 | { |
313f04b6 AM |
4923 | if (!SYMBOL_DEFINED_NON_SHARED_P (h)) |
4924 | return false; | |
cc78d0af | 4925 | BFD_ASSERT((h->got.offset & 1) != 0); |
5af6f000 L |
4926 | if (info->enable_dt_relr) |
4927 | generate_dynamic_reloc = false; | |
4928 | else | |
4929 | { | |
4930 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); | |
4931 | rela.r_addend = (h->root.u.def.value | |
4932 | + h->root.u.def.section->output_section->vma | |
4933 | + h->root.u.def.section->output_offset); | |
4934 | relative_reloc_name = "R_X86_64_RELATIVE"; | |
4935 | } | |
053579d7 AJ |
4936 | } |
4937 | else | |
4938 | { | |
4939 | BFD_ASSERT((h->got.offset & 1) == 0); | |
dc1e8a47 | 4940 | do_glob_dat: |
c434dee6 | 4941 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4942 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 4943 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
4944 | rela.r_addend = 0; |
4945 | } | |
4946 | ||
5af6f000 L |
4947 | if (generate_dynamic_reloc) |
4948 | { | |
4949 | if (relative_reloc_name != NULL | |
4950 | && htab->params->report_relative_reloc) | |
4951 | _bfd_x86_elf_link_report_relative_reloc | |
4952 | (info, relgot, h, sym, relative_reloc_name, &rela); | |
68b00778 | 4953 | |
5af6f000 L |
4954 | elf_append_rela (output_bfd, relgot, &rela); |
4955 | } | |
053579d7 AJ |
4956 | } |
4957 | ||
f5385ebf | 4958 | if (h->needs_copy) |
70256ad8 | 4959 | { |
70256ad8 | 4960 | Elf_Internal_Rela rela; |
5474d94f | 4961 | asection *s; |
70256ad8 AJ |
4962 | |
4963 | /* This symbol needs a copy reloc. Set it up. */ | |
ff38b4cc | 4964 | VERIFY_COPY_RELOC (h, htab) |
70256ad8 AJ |
4965 | |
4966 | rela.r_offset = (h->root.u.def.value | |
4967 | + h->root.u.def.section->output_section->vma | |
4968 | + h->root.u.def.section->output_offset); | |
351f65ca | 4969 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 4970 | rela.r_addend = 0; |
afbf7e8e | 4971 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
4972 | s = htab->elf.sreldynrelro; |
4973 | else | |
4974 | s = htab->elf.srelbss; | |
4975 | elf_append_rela (output_bfd, s, &rela); | |
70256ad8 AJ |
4976 | } |
4977 | ||
0a1b45a2 | 4978 | return true; |
70256ad8 AJ |
4979 | } |
4980 | ||
c25bc9fc L |
4981 | /* Finish up local dynamic symbol handling. We set the contents of |
4982 | various dynamic sections here. */ | |
4983 | ||
1201fda6 | 4984 | static int |
351f65ca | 4985 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
4986 | { |
4987 | struct elf_link_hash_entry *h | |
4988 | = (struct elf_link_hash_entry *) *slot; | |
4989 | struct bfd_link_info *info | |
eed180f8 | 4990 | = (struct bfd_link_info *) inf; |
c25bc9fc | 4991 | |
351f65ca | 4992 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
5f0f0847 | 4993 | info, h, NULL); |
c25bc9fc L |
4994 | } |
4995 | ||
aec6b87e L |
4996 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
4997 | here since undefined weak symbol may not be dynamic and may not be | |
4998 | called for elf_x86_64_finish_dynamic_symbol. */ | |
4999 | ||
0a1b45a2 | 5000 | static bool |
aec6b87e L |
5001 | elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, |
5002 | void *inf) | |
5003 | { | |
5004 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
5005 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
5006 | ||
5007 | if (h->root.type != bfd_link_hash_undefweak | |
5008 | || h->dynindx != -1) | |
0a1b45a2 | 5009 | return true; |
aec6b87e L |
5010 | |
5011 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, | |
5f0f0847 | 5012 | info, h, NULL); |
aec6b87e L |
5013 | } |
5014 | ||
c434dee6 AJ |
5015 | /* Used to decide how to sort relocs in an optimal manner for the |
5016 | dynamic linker, before writing them out. */ | |
5017 | ||
5018 | static enum elf_reloc_type_class | |
cae1fbbb | 5019 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
5020 | const asection *rel_sec ATTRIBUTE_UNUSED, |
5021 | const Elf_Internal_Rela *rela) | |
c434dee6 | 5022 | { |
cae1fbbb L |
5023 | bfd *abfd = info->output_bfd; |
5024 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
0afcef53 L |
5025 | struct elf_x86_link_hash_table *htab |
5026 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
cae1fbbb | 5027 | |
d9e3b590 L |
5028 | if (htab->elf.dynsym != NULL |
5029 | && htab->elf.dynsym->contents != NULL) | |
5030 | { | |
5031 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
07d6d2b8 | 5032 | dynamic symbols. */ |
d9e3b590 | 5033 | unsigned long r_symndx = htab->r_sym (rela->r_info); |
897463b1 L |
5034 | if (r_symndx != STN_UNDEF) |
5035 | { | |
5036 | Elf_Internal_Sym sym; | |
5037 | if (!bed->s->swap_symbol_in (abfd, | |
5038 | (htab->elf.dynsym->contents | |
5039 | + r_symndx * bed->s->sizeof_sym), | |
5040 | 0, &sym)) | |
5041 | abort (); | |
d9e3b590 | 5042 | |
897463b1 L |
5043 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
5044 | return reloc_class_ifunc; | |
5045 | } | |
d9e3b590 | 5046 | } |
cae1fbbb | 5047 | |
351f65ca | 5048 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 | 5049 | { |
c428ce9d L |
5050 | case R_X86_64_IRELATIVE: |
5051 | return reloc_class_ifunc; | |
c434dee6 | 5052 | case R_X86_64_RELATIVE: |
1da80baa | 5053 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
5054 | return reloc_class_relative; |
5055 | case R_X86_64_JUMP_SLOT: | |
5056 | return reloc_class_plt; | |
5057 | case R_X86_64_COPY: | |
5058 | return reloc_class_copy; | |
5059 | default: | |
5060 | return reloc_class_normal; | |
5061 | } | |
5062 | } | |
5063 | ||
70256ad8 AJ |
5064 | /* Finish up the dynamic sections. */ |
5065 | ||
0a1b45a2 | 5066 | static bool |
351f65ca L |
5067 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
5068 | struct bfd_link_info *info) | |
70256ad8 | 5069 | { |
0afcef53 | 5070 | struct elf_x86_link_hash_table *htab; |
70256ad8 | 5071 | |
9577f60b | 5072 | htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info); |
4dfe6ac6 | 5073 | if (htab == NULL) |
0a1b45a2 | 5074 | return false; |
4dfe6ac6 | 5075 | |
9577f60b | 5076 | if (! htab->elf.dynamic_sections_created) |
0a1b45a2 | 5077 | return true; |
70256ad8 | 5078 | |
9577f60b | 5079 | if (htab->elf.splt && htab->elf.splt->size > 0) |
e41b3a13 | 5080 | { |
7c80aab9 L |
5081 | if (bfd_is_abs_section (htab->elf.splt->output_section)) |
5082 | { | |
5083 | info->callbacks->einfo | |
5084 | (_("%F%P: discarded output section: `%pA'\n"), | |
5085 | htab->elf.splt); | |
5086 | return false; | |
5087 | } | |
5088 | ||
9577f60b L |
5089 | elf_section_data (htab->elf.splt->output_section) |
5090 | ->this_hdr.sh_entsize = htab->plt.plt_entry_size; | |
e41b3a13 | 5091 | |
9577f60b | 5092 | if (htab->plt.has_plt0) |
fff53dae | 5093 | { |
9577f60b L |
5094 | /* Fill in the special first entry in the procedure linkage |
5095 | table. */ | |
5096 | memcpy (htab->elf.splt->contents, | |
5097 | htab->lazy_plt->plt0_entry, | |
5098 | htab->lazy_plt->plt0_entry_size); | |
5099 | /* Add offset for pushq GOT+8(%rip), since the instruction | |
5100 | uses 6 bytes subtract this value. */ | |
5101 | bfd_put_32 (output_bfd, | |
5102 | (htab->elf.sgotplt->output_section->vma | |
5103 | + htab->elf.sgotplt->output_offset | |
5104 | + 8 | |
5105 | - htab->elf.splt->output_section->vma | |
5106 | - htab->elf.splt->output_offset | |
5107 | - 6), | |
5108 | (htab->elf.splt->contents | |
5109 | + htab->lazy_plt->plt0_got1_offset)); | |
5110 | /* Add offset for the PC-relative instruction accessing | |
5111 | GOT+16, subtracting the offset to the end of that | |
5112 | instruction. */ | |
5113 | bfd_put_32 (output_bfd, | |
5114 | (htab->elf.sgotplt->output_section->vma | |
5115 | + htab->elf.sgotplt->output_offset | |
5116 | + 16 | |
5117 | - htab->elf.splt->output_section->vma | |
5118 | - htab->elf.splt->output_offset | |
5119 | - htab->lazy_plt->plt0_got2_insn_end), | |
5120 | (htab->elf.splt->contents | |
5121 | + htab->lazy_plt->plt0_got2_offset)); | |
fff53dae | 5122 | } |
fff53dae | 5123 | |
9bcc30e4 | 5124 | if (htab->elf.tlsdesc_plt) |
8361ed4d | 5125 | { |
9577f60b | 5126 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
9bcc30e4 | 5127 | htab->elf.sgot->contents + htab->elf.tlsdesc_got); |
9577f60b | 5128 | |
9bcc30e4 | 5129 | memcpy (htab->elf.splt->contents + htab->elf.tlsdesc_plt, |
92e68c1d L |
5130 | htab->lazy_plt->plt_tlsdesc_entry, |
5131 | htab->lazy_plt->plt_tlsdesc_entry_size); | |
9577f60b | 5132 | |
bf54968b L |
5133 | /* Add offset for pushq GOT+8(%rip), since ENDBR64 uses 4 |
5134 | bytes and the instruction uses 6 bytes, subtract these | |
5135 | values. */ | |
9577f60b L |
5136 | bfd_put_32 (output_bfd, |
5137 | (htab->elf.sgotplt->output_section->vma | |
5138 | + htab->elf.sgotplt->output_offset | |
5139 | + 8 | |
5140 | - htab->elf.splt->output_section->vma | |
5141 | - htab->elf.splt->output_offset | |
9bcc30e4 | 5142 | - htab->elf.tlsdesc_plt |
92e68c1d | 5143 | - htab->lazy_plt->plt_tlsdesc_got1_insn_end), |
9577f60b | 5144 | (htab->elf.splt->contents |
9bcc30e4 | 5145 | + htab->elf.tlsdesc_plt |
92e68c1d | 5146 | + htab->lazy_plt->plt_tlsdesc_got1_offset)); |
bf54968b L |
5147 | /* Add offset for indirect branch via GOT+TDG, where TDG |
5148 | stands for htab->tlsdesc_got, subtracting the offset | |
5149 | to the end of that instruction. */ | |
9577f60b L |
5150 | bfd_put_32 (output_bfd, |
5151 | (htab->elf.sgot->output_section->vma | |
5152 | + htab->elf.sgot->output_offset | |
9bcc30e4 | 5153 | + htab->elf.tlsdesc_got |
9577f60b L |
5154 | - htab->elf.splt->output_section->vma |
5155 | - htab->elf.splt->output_offset | |
9bcc30e4 | 5156 | - htab->elf.tlsdesc_plt |
92e68c1d | 5157 | - htab->lazy_plt->plt_tlsdesc_got2_insn_end), |
9577f60b | 5158 | (htab->elf.splt->contents |
9bcc30e4 | 5159 | + htab->elf.tlsdesc_plt |
92e68c1d | 5160 | + htab->lazy_plt->plt_tlsdesc_got2_offset)); |
8361ed4d L |
5161 | } |
5162 | } | |
5163 | ||
aec6b87e L |
5164 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
5165 | if (bfd_link_pie (info)) | |
5166 | bfd_hash_traverse (&info->hash->table, | |
5167 | elf_x86_64_pie_finish_undefweak_symbol, | |
5168 | info); | |
5169 | ||
0a1b45a2 | 5170 | return true; |
8d88c4ca NC |
5171 | } |
5172 | ||
233cc9c1 L |
5173 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
5174 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
5175 | It has to be done before elf_link_sort_relocs is called so that | |
5176 | dynamic relocations are properly sorted. */ | |
5177 | ||
0a1b45a2 | 5178 | static bool |
233cc9c1 L |
5179 | elf_x86_64_output_arch_local_syms |
5180 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
5181 | struct bfd_link_info *info, | |
5182 | void *flaginfo ATTRIBUTE_UNUSED, | |
5183 | int (*func) (void *, const char *, | |
5184 | Elf_Internal_Sym *, | |
5185 | asection *, | |
5186 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
5187 | { | |
0afcef53 L |
5188 | struct elf_x86_link_hash_table *htab |
5189 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
233cc9c1 | 5190 | if (htab == NULL) |
0a1b45a2 | 5191 | return false; |
233cc9c1 L |
5192 | |
5193 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
5194 | htab_traverse (htab->loc_hash_table, | |
5195 | elf_x86_64_finish_local_dynamic_symbol, | |
5196 | info); | |
5197 | ||
0a1b45a2 | 5198 | return true; |
233cc9c1 L |
5199 | } |
5200 | ||
38b12349 L |
5201 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all |
5202 | dynamic relocations. */ | |
5203 | ||
5204 | static long | |
5205 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
5206 | long symcount ATTRIBUTE_UNUSED, | |
5207 | asymbol **syms ATTRIBUTE_UNUSED, | |
5208 | long dynsymcount, | |
5209 | asymbol **dynsyms, | |
5210 | asymbol **ret) | |
5211 | { | |
f493882d | 5212 | long count, i, n; |
38b12349 | 5213 | int j; |
38b12349 | 5214 | bfd_byte *plt_contents; |
f493882d | 5215 | long relsize; |
765e526c L |
5216 | const struct elf_x86_lazy_plt_layout *lazy_plt; |
5217 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
5218 | const struct elf_x86_lazy_plt_layout *lazy_bnd_plt; | |
5219 | const struct elf_x86_non_lazy_plt_layout *non_lazy_bnd_plt; | |
5220 | const struct elf_x86_lazy_plt_layout *lazy_ibt_plt; | |
5221 | const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt; | |
e9c11d58 L |
5222 | const struct elf_x86_lazy_plt_layout *x32_lazy_ibt_plt; |
5223 | const struct elf_x86_non_lazy_plt_layout *x32_non_lazy_ibt_plt; | |
38b12349 | 5224 | asection *plt; |
f493882d L |
5225 | enum elf_x86_plt_type plt_type; |
5226 | struct elf_x86_plt plts[] = | |
144bed8d | 5227 | { |
38b12349 L |
5228 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
5229 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
f2c29a16 L |
5230 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, |
5231 | { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
dd9e66ee | 5232 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } |
38b12349 | 5233 | }; |
144bed8d | 5234 | |
38b12349 | 5235 | *ret = NULL; |
144bed8d | 5236 | |
38b12349 L |
5237 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
5238 | return 0; | |
144bed8d | 5239 | |
38b12349 L |
5240 | if (dynsymcount <= 0) |
5241 | return 0; | |
cca5b8b6 | 5242 | |
38b12349 L |
5243 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
5244 | if (relsize <= 0) | |
5245 | return -1; | |
5246 | ||
bbd19b19 L |
5247 | lazy_plt = &elf_x86_64_lazy_plt; |
5248 | non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
5249 | lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt; | |
5250 | non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt; | |
5251 | if (ABI_64_P (abfd)) | |
144bed8d | 5252 | { |
bbd19b19 L |
5253 | lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; |
5254 | non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
e9c11d58 L |
5255 | x32_lazy_ibt_plt = &elf_x32_lazy_ibt_plt; |
5256 | x32_non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
38b12349 L |
5257 | } |
5258 | else | |
5259 | { | |
bbd19b19 L |
5260 | lazy_ibt_plt = &elf_x32_lazy_ibt_plt; |
5261 | non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
e9c11d58 L |
5262 | x32_lazy_ibt_plt = NULL; |
5263 | x32_non_lazy_ibt_plt = NULL; | |
38b12349 | 5264 | } |
144bed8d | 5265 | |
38b12349 L |
5266 | count = 0; |
5267 | for (j = 0; plts[j].name != NULL; j++) | |
5268 | { | |
5269 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
81ff113f AM |
5270 | if (plt == NULL |
5271 | || plt->size == 0 | |
5272 | || (plt->flags & SEC_HAS_CONTENTS) == 0) | |
6f25f223 | 5273 | continue; |
533d0af0 | 5274 | |
38b12349 | 5275 | /* Get the PLT section contents. */ |
b5f386d5 | 5276 | if (!bfd_malloc_and_get_section (abfd, plt, &plt_contents)) |
38b12349 | 5277 | break; |
144bed8d | 5278 | |
38b12349 L |
5279 | /* Check what kind of PLT it is. */ |
5280 | plt_type = plt_unknown; | |
90efb642 L |
5281 | if (plts[j].type == plt_unknown |
5282 | && (plt->size >= (lazy_plt->plt_entry_size | |
5283 | + lazy_plt->plt_entry_size))) | |
144bed8d | 5284 | { |
38b12349 L |
5285 | /* Match lazy PLT first. Need to check the first two |
5286 | instructions. */ | |
5287 | if ((memcmp (plt_contents, lazy_plt->plt0_entry, | |
5288 | lazy_plt->plt0_got1_offset) == 0) | |
5289 | && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6, | |
5290 | 2) == 0)) | |
e9c11d58 L |
5291 | { |
5292 | if (x32_lazy_ibt_plt != NULL | |
5293 | && (memcmp (plt_contents | |
5294 | + x32_lazy_ibt_plt->plt_entry_size, | |
5295 | x32_lazy_ibt_plt->plt_entry, | |
5296 | x32_lazy_ibt_plt->plt_got_offset) == 0)) | |
5297 | { | |
5298 | /* The fist entry in the x32 lazy IBT PLT is the same | |
5299 | as the lazy PLT. */ | |
5300 | plt_type = plt_lazy | plt_second; | |
5301 | lazy_plt = x32_lazy_ibt_plt; | |
5302 | } | |
5303 | else | |
5304 | plt_type = plt_lazy; | |
5305 | } | |
38b12349 L |
5306 | else if (lazy_bnd_plt != NULL |
5307 | && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry, | |
5308 | lazy_bnd_plt->plt0_got1_offset) == 0) | |
5309 | && (memcmp (plt_contents + 6, | |
5310 | lazy_bnd_plt->plt0_entry + 6, 3) == 0)) | |
ec1f73bb | 5311 | { |
f2c29a16 | 5312 | plt_type = plt_lazy | plt_second; |
ee2fdd6f L |
5313 | /* The fist entry in the lazy IBT PLT is the same as the |
5314 | lazy BND PLT. */ | |
5315 | if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size, | |
5316 | lazy_ibt_plt->plt_entry, | |
5317 | lazy_ibt_plt->plt_got_offset) == 0)) | |
5318 | lazy_plt = lazy_ibt_plt; | |
5319 | else | |
5320 | lazy_plt = lazy_bnd_plt; | |
ec1f73bb | 5321 | } |
144bed8d | 5322 | } |
fca6ae69 | 5323 | |
38b12349 | 5324 | if (non_lazy_plt != NULL |
90efb642 L |
5325 | && (plt_type == plt_unknown || plt_type == plt_non_lazy) |
5326 | && plt->size >= non_lazy_plt->plt_entry_size) | |
38b12349 L |
5327 | { |
5328 | /* Match non-lazy PLT. */ | |
5329 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
5330 | non_lazy_plt->plt_got_offset) == 0) | |
5331 | plt_type = plt_non_lazy; | |
5332 | } | |
5333 | ||
ee2fdd6f | 5334 | if (plt_type == plt_unknown || plt_type == plt_second) |
38b12349 | 5335 | { |
ee2fdd6f | 5336 | if (non_lazy_bnd_plt != NULL |
90efb642 | 5337 | && plt->size >= non_lazy_bnd_plt->plt_entry_size |
ee2fdd6f L |
5338 | && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry, |
5339 | non_lazy_bnd_plt->plt_got_offset) == 0)) | |
38b12349 | 5340 | { |
ee2fdd6f | 5341 | /* Match BND PLT. */ |
f2c29a16 | 5342 | plt_type = plt_second; |
38b12349 L |
5343 | non_lazy_plt = non_lazy_bnd_plt; |
5344 | } | |
ee2fdd6f | 5345 | else if (non_lazy_ibt_plt != NULL |
90efb642 | 5346 | && plt->size >= non_lazy_ibt_plt->plt_entry_size |
ee2fdd6f L |
5347 | && (memcmp (plt_contents, |
5348 | non_lazy_ibt_plt->plt_entry, | |
5349 | non_lazy_ibt_plt->plt_got_offset) == 0)) | |
5350 | { | |
5351 | /* Match IBT PLT. */ | |
5352 | plt_type = plt_second; | |
5353 | non_lazy_plt = non_lazy_ibt_plt; | |
5354 | } | |
e9c11d58 L |
5355 | else if (x32_non_lazy_ibt_plt != NULL |
5356 | && plt->size >= x32_non_lazy_ibt_plt->plt_entry_size | |
5357 | && (memcmp (plt_contents, | |
5358 | x32_non_lazy_ibt_plt->plt_entry, | |
5359 | x32_non_lazy_ibt_plt->plt_got_offset) == 0)) | |
5360 | { | |
5361 | /* Match x32 IBT PLT. */ | |
5362 | plt_type = plt_second; | |
5363 | non_lazy_plt = x32_non_lazy_ibt_plt; | |
5364 | } | |
38b12349 L |
5365 | } |
5366 | ||
5367 | if (plt_type == plt_unknown) | |
37c0b6ee L |
5368 | { |
5369 | free (plt_contents); | |
5370 | continue; | |
5371 | } | |
38b12349 L |
5372 | |
5373 | plts[j].sec = plt; | |
5374 | plts[j].type = plt_type; | |
5375 | ||
5376 | if ((plt_type & plt_lazy)) | |
5377 | { | |
5378 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
5379 | plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size; | |
5380 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
5381 | /* Skip PLT0 in lazy PLT. */ | |
5382 | i = 1; | |
5383 | } | |
5384 | else | |
5385 | { | |
5386 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
5387 | plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size; | |
5388 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
5389 | i = 0; | |
5390 | } | |
5391 | ||
f2c29a16 L |
5392 | /* Skip lazy PLT when the second PLT is used. */ |
5393 | if (plt_type == (plt_lazy | plt_second)) | |
38b12349 L |
5394 | plts[j].count = 0; |
5395 | else | |
5396 | { | |
5397 | n = plt->size / plts[j].plt_entry_size; | |
5398 | plts[j].count = n; | |
5399 | count += n - i; | |
5400 | } | |
5401 | ||
5402 | plts[j].contents = plt_contents; | |
144bed8d L |
5403 | } |
5404 | ||
f493882d L |
5405 | return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize, |
5406 | (bfd_vma) 0, plts, dynsyms, | |
5407 | ret); | |
0ff2b86e L |
5408 | } |
5409 | ||
d2b2c203 DJ |
5410 | /* Handle an x86-64 specific section when reading an object file. This |
5411 | is called when elfcode.h finds a section with an unknown type. */ | |
5412 | ||
0a1b45a2 | 5413 | static bool |
0c723101 L |
5414 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
5415 | const char *name, int shindex) | |
d2b2c203 DJ |
5416 | { |
5417 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
0a1b45a2 | 5418 | return false; |
d2b2c203 | 5419 | |
6dc132d9 | 5420 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
0a1b45a2 | 5421 | return false; |
d2b2c203 | 5422 | |
0a1b45a2 | 5423 | return true; |
d2b2c203 DJ |
5424 | } |
5425 | ||
3b22753a L |
5426 | /* Hook called by the linker routine which adds symbols from an object |
5427 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
5428 | of .bss. */ | |
5429 | ||
0a1b45a2 | 5430 | static bool |
351f65ca | 5431 | elf_x86_64_add_symbol_hook (bfd *abfd, |
a43942db | 5432 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
351f65ca L |
5433 | Elf_Internal_Sym *sym, |
5434 | const char **namep ATTRIBUTE_UNUSED, | |
5435 | flagword *flagsp ATTRIBUTE_UNUSED, | |
5436 | asection **secp, | |
5437 | bfd_vma *valp) | |
3b22753a L |
5438 | { |
5439 | asection *lcomm; | |
5440 | ||
5441 | switch (sym->st_shndx) | |
5442 | { | |
5443 | case SHN_X86_64_LCOMMON: | |
5444 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
5445 | if (lcomm == NULL) | |
5446 | { | |
5447 | lcomm = bfd_make_section_with_flags (abfd, | |
5448 | "LARGE_COMMON", | |
5449 | (SEC_ALLOC | |
5450 | | SEC_IS_COMMON | |
5451 | | SEC_LINKER_CREATED)); | |
5452 | if (lcomm == NULL) | |
0a1b45a2 | 5453 | return false; |
3b22753a L |
5454 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; |
5455 | } | |
5456 | *secp = lcomm; | |
5457 | *valp = sym->st_size; | |
0a1b45a2 | 5458 | return true; |
3b22753a | 5459 | } |
d8045f23 | 5460 | |
0a1b45a2 | 5461 | return true; |
3b22753a L |
5462 | } |
5463 | ||
5464 | ||
5465 | /* Given a BFD section, try to locate the corresponding ELF section | |
5466 | index. */ | |
5467 | ||
0a1b45a2 | 5468 | static bool |
351f65ca L |
5469 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
5470 | asection *sec, int *index_return) | |
3b22753a L |
5471 | { |
5472 | if (sec == &_bfd_elf_large_com_section) | |
5473 | { | |
91d6fa6a | 5474 | *index_return = SHN_X86_64_LCOMMON; |
0a1b45a2 | 5475 | return true; |
3b22753a | 5476 | } |
0a1b45a2 | 5477 | return false; |
3b22753a L |
5478 | } |
5479 | ||
5480 | /* Process a symbol. */ | |
5481 | ||
5482 | static void | |
351f65ca L |
5483 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
5484 | asymbol *asym) | |
3b22753a L |
5485 | { |
5486 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
5487 | ||
5488 | switch (elfsym->internal_elf_sym.st_shndx) | |
5489 | { | |
5490 | case SHN_X86_64_LCOMMON: | |
5491 | asym->section = &_bfd_elf_large_com_section; | |
5492 | asym->value = elfsym->internal_elf_sym.st_size; | |
5493 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
5494 | asym->flags &= ~BSF_GLOBAL; | |
5495 | break; | |
5496 | } | |
5497 | } | |
5498 | ||
0a1b45a2 | 5499 | static bool |
351f65ca | 5500 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
5501 | { |
5502 | return (sym->st_shndx == SHN_COMMON | |
5503 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
5504 | } | |
5505 | ||
5506 | static unsigned int | |
351f65ca | 5507 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
5508 | { |
5509 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
5510 | return SHN_COMMON; | |
5511 | else | |
5512 | return SHN_X86_64_LCOMMON; | |
5513 | } | |
5514 | ||
5515 | static asection * | |
351f65ca | 5516 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
5517 | { |
5518 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
5519 | return bfd_com_section_ptr; | |
5520 | else | |
5521 | return &_bfd_elf_large_com_section; | |
5522 | } | |
5523 | ||
0a1b45a2 | 5524 | static bool |
5d13b3b3 AM |
5525 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
5526 | const Elf_Internal_Sym *sym, | |
351f65ca | 5527 | asection **psec, |
0a1b45a2 AM |
5528 | bool newdef, |
5529 | bool olddef, | |
351f65ca | 5530 | bfd *oldbfd, |
5d13b3b3 | 5531 | const asection *oldsec) |
3b22753a L |
5532 | { |
5533 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
5534 | normal common symbol. We turn the large common symbol into a |
5535 | normal one. */ | |
5d13b3b3 | 5536 | if (!olddef |
3b22753a | 5537 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
5538 | && !newdef |
5539 | && bfd_is_com_section (*psec) | |
5540 | && oldsec != *psec) | |
3b22753a | 5541 | { |
00492999 | 5542 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 5543 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
5544 | { |
5545 | h->root.u.c.p->section | |
5546 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
5547 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
5548 | } | |
5549 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
5550 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
5551 | *psec = bfd_com_section_ptr; | |
3b22753a L |
5552 | } |
5553 | ||
0a1b45a2 | 5554 | return true; |
3b22753a L |
5555 | } |
5556 | ||
b5c37946 SJ |
5557 | static bool |
5558 | elf_x86_64_section_flags (const Elf_Internal_Shdr *hdr) | |
5559 | { | |
5560 | if ((hdr->sh_flags & SHF_X86_64_LARGE) != 0) | |
5561 | hdr->bfd_section->flags |= SEC_ELF_LARGE; | |
5562 | ||
5563 | return true; | |
5564 | } | |
5565 | ||
5566 | static bool | |
5567 | elf_x86_64_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, | |
5568 | Elf_Internal_Shdr *hdr, asection *sec) | |
5569 | { | |
5570 | if (sec->flags & SEC_ELF_LARGE) | |
5571 | hdr->sh_flags |= SHF_X86_64_LARGE; | |
5572 | ||
5573 | return true; | |
5574 | } | |
5575 | ||
5576 | static bool | |
5577 | elf_x86_64_copy_private_section_data (bfd *ibfd, asection *isec, | |
5578 | bfd *obfd, asection *osec) | |
5579 | { | |
5580 | if (!_bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec)) | |
5581 | return false; | |
5582 | ||
5583 | /* objcopy --set-section-flags without "large" drops SHF_X86_64_LARGE. */ | |
5584 | if (ibfd != obfd) | |
5585 | elf_section_flags (osec) &= ~SHF_X86_64_LARGE; | |
5586 | ||
5587 | return true; | |
5588 | } | |
5589 | ||
3b22753a | 5590 | static int |
351f65ca L |
5591 | elf_x86_64_additional_program_headers (bfd *abfd, |
5592 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
5593 | { |
5594 | asection *s; | |
9a2e389a | 5595 | int count = 0; |
3b22753a L |
5596 | |
5597 | /* Check to see if we need a large readonly segment. */ | |
5598 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
5599 | if (s && (s->flags & SEC_LOAD)) | |
5600 | count++; | |
5601 | ||
5602 | /* Check to see if we need a large data segment. Since .lbss sections | |
5603 | is placed right after the .bss section, there should be no need for | |
5604 | a large data segment just because of .lbss. */ | |
5605 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
5606 | if (s && (s->flags & SEC_LOAD)) | |
5607 | count++; | |
5608 | ||
5609 | return count; | |
5610 | } | |
5611 | ||
c543bf9a L |
5612 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
5613 | ||
0a1b45a2 | 5614 | static bool |
c543bf9a L |
5615 | elf_x86_64_relocs_compatible (const bfd_target *input, |
5616 | const bfd_target *output) | |
5617 | { | |
5618 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
5619 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
5620 | && _bfd_elf_relocs_compatible (input, output)); | |
5621 | } | |
5622 | ||
38b12349 L |
5623 | /* Set up x86-64 GNU properties. Return the first relocatable ELF input |
5624 | with GNU properties if found. Otherwise, return NULL. */ | |
5625 | ||
5626 | static bfd * | |
5627 | elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info) | |
5628 | { | |
1de031c8 | 5629 | struct elf_x86_init_table init_table; |
bbd19b19 L |
5630 | const struct elf_backend_data *bed; |
5631 | struct elf_x86_link_hash_table *htab; | |
ee2fdd6f | 5632 | |
78984959 L |
5633 | if ((int) R_X86_64_standard >= (int) R_X86_64_converted_reloc_bit |
5634 | || (int) R_X86_64_max <= (int) R_X86_64_converted_reloc_bit | |
5635 | || ((int) (R_X86_64_GNU_VTINHERIT | R_X86_64_converted_reloc_bit) | |
5636 | != (int) R_X86_64_GNU_VTINHERIT) | |
5637 | || ((int) (R_X86_64_GNU_VTENTRY | R_X86_64_converted_reloc_bit) | |
5638 | != (int) R_X86_64_GNU_VTENTRY)) | |
5639 | abort (); | |
5640 | ||
851b6fa1 L |
5641 | /* This is unused for x86-64. */ |
5642 | init_table.plt0_pad_byte = 0x90; | |
5643 | ||
bbd19b19 L |
5644 | bed = get_elf_backend_data (info->output_bfd); |
5645 | htab = elf_x86_hash_table (info, bed->target_id); | |
5646 | if (!htab) | |
5647 | abort (); | |
8ad93045 ML |
5648 | |
5649 | init_table.lazy_plt = &elf_x86_64_lazy_plt; | |
5650 | init_table.non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
38b12349 | 5651 | |
e9c11d58 L |
5652 | init_table.lazy_ibt_plt = &elf_x32_lazy_ibt_plt; |
5653 | init_table.non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
38b12349 | 5654 | |
cf0e0a0b IB |
5655 | if (ABI_64_P (info->output_bfd)) |
5656 | { | |
5657 | init_table.sframe_lazy_plt = &elf_x86_64_sframe_plt; | |
5658 | init_table.sframe_non_lazy_plt = &elf_x86_64_sframe_non_lazy_plt; | |
5659 | init_table.sframe_lazy_ibt_plt = &elf_x86_64_sframe_plt; | |
5660 | init_table.sframe_non_lazy_ibt_plt = &elf_x86_64_sframe_non_lazy_plt; | |
5661 | } | |
5662 | else | |
5663 | { | |
5664 | /* SFrame is not supported for non AMD64. */ | |
5665 | init_table.sframe_lazy_plt = NULL; | |
5666 | init_table.sframe_non_lazy_plt = NULL; | |
5667 | } | |
5668 | ||
7a382c1c L |
5669 | if (ABI_64_P (info->output_bfd)) |
5670 | { | |
1de031c8 L |
5671 | init_table.r_info = elf64_r_info; |
5672 | init_table.r_sym = elf64_r_sym; | |
7a382c1c L |
5673 | } |
5674 | else | |
5675 | { | |
1de031c8 L |
5676 | init_table.r_info = elf32_r_info; |
5677 | init_table.r_sym = elf32_r_sym; | |
7a382c1c L |
5678 | } |
5679 | ||
1de031c8 | 5680 | return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table); |
38b12349 L |
5681 | } |
5682 | ||
91673042 L |
5683 | static void |
5684 | elf_x86_64_add_glibc_version_dependency | |
5685 | (struct elf_find_verdep_info *rinfo) | |
5686 | { | |
5687 | unsigned int i = 0; | |
5688 | const char *version[3] = { NULL, NULL, NULL }; | |
5689 | struct elf_x86_link_hash_table *htab; | |
5690 | ||
5691 | if (rinfo->info->enable_dt_relr) | |
5692 | { | |
5693 | version[i] = "GLIBC_ABI_DT_RELR"; | |
5694 | i++; | |
5695 | } | |
5696 | ||
5697 | htab = elf_x86_hash_table (rinfo->info, X86_64_ELF_DATA); | |
5698 | if (htab != NULL && htab->params->mark_plt) | |
5699 | { | |
5700 | version[i] = "GLIBC_2.36"; | |
5701 | i++; | |
5702 | } | |
5703 | ||
5704 | if (i != 0) | |
5705 | _bfd_elf_link_add_glibc_version_dependency (rinfo, version); | |
5706 | } | |
5707 | ||
9a2e389a | 5708 | static const struct bfd_elf_special_section |
46bed679 | 5709 | elf_x86_64_special_sections[]= |
3b22753a | 5710 | { |
0112cd26 NC |
5711 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
5712 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
5713 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
07d6d2b8 | 5714 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
0112cd26 NC |
5715 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
5716 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
07d6d2b8 | 5717 | { NULL, 0, 0, 0, 0 } |
3b22753a L |
5718 | }; |
5719 | ||
6d00b590 | 5720 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
5721 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
5722 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 5723 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 5724 | #define ELF_MACHINE_CODE EM_X86_64 |
a2267dbf | 5725 | #define ELF_MAXPAGESIZE 0x1000 |
24718e3b | 5726 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
5727 | |
5728 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 5729 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
5730 | #define elf_backend_want_got_plt 1 |
5731 | #define elf_backend_plt_readonly 1 | |
5732 | #define elf_backend_want_plt_sym 0 | |
5733 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 5734 | #define elf_backend_rela_normal 1 |
07d6d2b8 | 5735 | #define elf_backend_plt_alignment 4 |
bedfd056 | 5736 | #define elf_backend_caches_rawsize 1 |
64f52338 | 5737 | #define elf_backend_dtrel_excludes_plt 1 |
5474d94f | 5738 | #define elf_backend_want_dynrelro 1 |
70256ad8 | 5739 | |
351f65ca | 5740 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 5741 | |
b5c37946 SJ |
5742 | #define bfd_elf64_bfd_copy_private_section_data \ |
5743 | elf_x86_64_copy_private_section_data | |
351f65ca | 5744 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 5745 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 5746 | elf_x86_64_reloc_name_lookup |
70256ad8 | 5747 | |
c543bf9a | 5748 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
af969b14 | 5749 | #define elf_backend_early_size_sections elf_x86_64_early_size_sections |
38b12349 | 5750 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
351f65ca L |
5751 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections |
5752 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
233cc9c1 | 5753 | #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms |
351f65ca L |
5754 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus |
5755 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
5756 | #ifdef CORE_HEADER |
5757 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
5758 | #endif | |
351f65ca L |
5759 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
5760 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
74541ad4 | 5761 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 5762 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
0ff2b86e | 5763 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 5764 | |
d2b2c203 | 5765 | #define elf_backend_section_from_shdr \ |
351f65ca | 5766 | elf_x86_64_section_from_shdr |
d2b2c203 | 5767 | |
3b22753a | 5768 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 5769 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 5770 | #define elf_backend_add_symbol_hook \ |
351f65ca | 5771 | elf_x86_64_add_symbol_hook |
3b22753a | 5772 | #define elf_backend_symbol_processing \ |
351f65ca | 5773 | elf_x86_64_symbol_processing |
3b22753a | 5774 | #define elf_backend_common_section_index \ |
351f65ca | 5775 | elf_x86_64_common_section_index |
3b22753a | 5776 | #define elf_backend_common_section \ |
351f65ca | 5777 | elf_x86_64_common_section |
3b22753a | 5778 | #define elf_backend_common_definition \ |
351f65ca | 5779 | elf_x86_64_common_definition |
3b22753a | 5780 | #define elf_backend_merge_symbol \ |
351f65ca | 5781 | elf_x86_64_merge_symbol |
3b22753a | 5782 | #define elf_backend_special_sections \ |
351f65ca | 5783 | elf_x86_64_special_sections |
b5c37946 SJ |
5784 | #define elf_backend_section_flags elf_x86_64_section_flags |
5785 | #define elf_backend_fake_sections elf_x86_64_fake_sections | |
3b22753a | 5786 | #define elf_backend_additional_program_headers \ |
351f65ca | 5787 | elf_x86_64_additional_program_headers |
38b12349 | 5788 | #define elf_backend_setup_gnu_properties \ |
9f857535 L |
5789 | elf_x86_64_link_setup_gnu_properties |
5790 | #define elf_backend_hide_symbol \ | |
5791 | _bfd_x86_elf_hide_symbol | |
91673042 L |
5792 | #define elf_backend_add_glibc_version_dependency \ |
5793 | elf_x86_64_add_glibc_version_dependency | |
3b22753a | 5794 | |
8f56f7a2 L |
5795 | #undef elf64_bed |
5796 | #define elf64_bed elf64_x86_64_bed | |
5797 | ||
8d88c4ca | 5798 | #include "elf64-target.h" |
9d7cbccd | 5799 | |
6036f486 ES |
5800 | /* CloudABI support. */ |
5801 | ||
07d6d2b8 | 5802 | #undef TARGET_LITTLE_SYM |
6036f486 | 5803 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec |
07d6d2b8 | 5804 | #undef TARGET_LITTLE_NAME |
6036f486 ES |
5805 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" |
5806 | ||
5807 | #undef ELF_OSABI | |
5808 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
5809 | ||
07d6d2b8 | 5810 | #undef elf64_bed |
6036f486 ES |
5811 | #define elf64_bed elf64_x86_64_cloudabi_bed |
5812 | ||
5813 | #include "elf64-target.h" | |
5814 | ||
9d7cbccd NC |
5815 | /* FreeBSD support. */ |
5816 | ||
07d6d2b8 | 5817 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5818 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
07d6d2b8 | 5819 | #undef TARGET_LITTLE_NAME |
9d7cbccd NC |
5820 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" |
5821 | ||
d1036acb L |
5822 | #undef ELF_OSABI |
5823 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 5824 | |
07d6d2b8 | 5825 | #undef elf64_bed |
9d7cbccd NC |
5826 | #define elf64_bed elf64_x86_64_fbsd_bed |
5827 | ||
5828 | #include "elf64-target.h" | |
8a9036a4 | 5829 | |
a6cc6b3b RO |
5830 | /* Solaris 2 support. */ |
5831 | ||
5832 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5833 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
5834 | #undef TARGET_LITTLE_NAME |
5835 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
5836 | ||
90c14f0c L |
5837 | #undef ELF_TARGET_OS |
5838 | #define ELF_TARGET_OS is_solaris | |
3b4c3844 | 5839 | |
a6cc6b3b RO |
5840 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE |
5841 | objects won't be recognized. */ | |
5842 | #undef ELF_OSABI | |
5843 | ||
5844 | #undef elf64_bed | |
5845 | #define elf64_bed elf64_x86_64_sol2_bed | |
5846 | ||
7dc98aea RO |
5847 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
5848 | boundary. */ | |
84865015 | 5849 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
5850 | #define elf_backend_static_tls_alignment 16 |
5851 | ||
a6cc6b3b RO |
5852 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
5853 | ||
5854 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
5855 | File, p.63. */ | |
84865015 | 5856 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
5857 | #define elf_backend_want_plt_sym 1 |
5858 | ||
84865015 NC |
5859 | #undef elf_backend_strtab_flags |
5860 | #define elf_backend_strtab_flags SHF_STRINGS | |
5861 | ||
0a1b45a2 | 5862 | static bool |
5522f910 NC |
5863 | elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
5864 | bfd *obfd ATTRIBUTE_UNUSED, | |
5865 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
5866 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
5867 | { |
5868 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
5869 | and sh_link fields of Solaris specific section types. */ | |
0a1b45a2 | 5870 | return false; |
84865015 NC |
5871 | } |
5872 | ||
5522f910 NC |
5873 | #undef elf_backend_copy_special_section_fields |
5874 | #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields | |
84865015 | 5875 | |
a6cc6b3b RO |
5876 | #include "elf64-target.h" |
5877 | ||
8059fb19 RM |
5878 | /* Restore defaults. */ |
5879 | #undef ELF_OSABI | |
5880 | #undef elf_backend_static_tls_alignment | |
5881 | #undef elf_backend_want_plt_sym | |
5882 | #define elf_backend_want_plt_sym 0 | |
84865015 | 5883 | #undef elf_backend_strtab_flags |
5522f910 | 5884 | #undef elf_backend_copy_special_section_fields |
8059fb19 | 5885 | |
351f65ca L |
5886 | /* 32bit x86-64 support. */ |
5887 | ||
351f65ca | 5888 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5889 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
5890 | #undef TARGET_LITTLE_NAME |
5891 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 5892 | #undef elf32_bed |
bbd19b19 | 5893 | #define elf32_bed elf32_x86_64_bed |
351f65ca L |
5894 | |
5895 | #undef ELF_ARCH | |
5896 | #define ELF_ARCH bfd_arch_i386 | |
5897 | ||
5898 | #undef ELF_MACHINE_CODE | |
5899 | #define ELF_MACHINE_CODE EM_X86_64 | |
5900 | ||
801a7eab | 5901 | #undef ELF_TARGET_OS |
351f65ca L |
5902 | #undef ELF_OSABI |
5903 | ||
b5c37946 SJ |
5904 | #define bfd_elf32_bfd_copy_private_section_data \ |
5905 | elf_x86_64_copy_private_section_data | |
bbd19b19 L |
5906 | #define bfd_elf32_bfd_reloc_type_lookup \ |
5907 | elf_x86_64_reloc_type_lookup | |
5908 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
5909 | elf_x86_64_reloc_name_lookup | |
5910 | #define bfd_elf32_get_synthetic_symtab \ | |
5911 | elf_x86_64_get_synthetic_symtab | |
5912 | ||
351f65ca L |
5913 | #undef elf_backend_object_p |
5914 | #define elf_backend_object_p \ | |
5915 | elf32_x86_64_elf_object_p | |
5916 | ||
5917 | #undef elf_backend_bfd_from_remote_memory | |
5918 | #define elf_backend_bfd_from_remote_memory \ | |
5919 | _bfd_elf32_bfd_from_remote_memory | |
5920 | ||
5921 | #undef elf_backend_size_info | |
5922 | #define elf_backend_size_info \ | |
5923 | _bfd_elf32_size_info | |
5924 | ||
5925 | #include "elf32-target.h" |