Commit | Line | Data |
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351f65ca | 1 | /* X86-64 specific support for ELF |
250d07de | 2 | Copyright (C) 2000-2021 Free Software Foundation, Inc. |
8d88c4ca NC |
3 | Contributed by Jan Hubicka <jh@suse.cz>. |
4 | ||
ae9a127f | 5 | This file is part of BFD, the Binary File Descriptor library. |
8d88c4ca | 6 | |
ae9a127f NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
ae9a127f | 10 | (at your option) any later version. |
8d88c4ca | 11 | |
ae9a127f NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
8d88c4ca | 16 | |
ae9a127f NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
8d88c4ca | 21 | |
0afcef53 | 22 | #include "elfxx-x86.h" |
e41b3a13 | 23 | #include "dwarf2.h" |
d7921315 | 24 | #include "libiberty.h" |
8d88c4ca | 25 | |
56ceb5b5 | 26 | #include "opcode/i386.h" |
8d88c4ca NC |
27 | #include "elf/x86-64.h" |
28 | ||
8fd79e71 L |
29 | #ifdef CORE_HEADER |
30 | #include <stdarg.h> | |
31 | #include CORE_HEADER | |
32 | #endif | |
33 | ||
8d88c4ca NC |
34 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
35 | #define MINUS_ONE (~ (bfd_vma) 0) | |
36 | ||
351f65ca L |
37 | /* Since both 32-bit and 64-bit x86-64 encode relocation type in the |
38 | identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get | |
39 | relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE | |
40 | since they are the same. */ | |
41 | ||
8d88c4ca | 42 | /* The relocation "howto" table. Order of fields: |
7b81dfbb AJ |
43 | type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow, |
44 | special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */ | |
70256ad8 AJ |
45 | static reloc_howto_type x86_64_elf_howto_table[] = |
46 | { | |
0a1b45a2 AM |
47 | HOWTO(R_X86_64_NONE, 0, 3, 0, false, 0, complain_overflow_dont, |
48 | bfd_elf_generic_reloc, "R_X86_64_NONE", false, 0x00000000, 0x00000000, | |
49 | false), | |
50 | HOWTO(R_X86_64_64, 0, 4, 64, false, 0, complain_overflow_bitfield, | |
51 | bfd_elf_generic_reloc, "R_X86_64_64", false, MINUS_ONE, MINUS_ONE, | |
52 | false), | |
53 | HOWTO(R_X86_64_PC32, 0, 2, 32, true, 0, complain_overflow_signed, | |
54 | bfd_elf_generic_reloc, "R_X86_64_PC32", false, 0xffffffff, 0xffffffff, | |
55 | true), | |
56 | HOWTO(R_X86_64_GOT32, 0, 2, 32, false, 0, complain_overflow_signed, | |
57 | bfd_elf_generic_reloc, "R_X86_64_GOT32", false, 0xffffffff, 0xffffffff, | |
58 | false), | |
59 | HOWTO(R_X86_64_PLT32, 0, 2, 32, true, 0, complain_overflow_signed, | |
60 | bfd_elf_generic_reloc, "R_X86_64_PLT32", false, 0xffffffff, 0xffffffff, | |
61 | true), | |
62 | HOWTO(R_X86_64_COPY, 0, 2, 32, false, 0, complain_overflow_bitfield, | |
63 | bfd_elf_generic_reloc, "R_X86_64_COPY", false, 0xffffffff, 0xffffffff, | |
64 | false), | |
65 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, false, 0, complain_overflow_bitfield, | |
66 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", false, MINUS_ONE, | |
67 | MINUS_ONE, false), | |
68 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, false, 0, complain_overflow_bitfield, | |
69 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", false, MINUS_ONE, | |
70 | MINUS_ONE, false), | |
71 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, false, 0, complain_overflow_bitfield, | |
72 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", false, MINUS_ONE, | |
73 | MINUS_ONE, false), | |
74 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, true, 0, complain_overflow_signed, | |
75 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", false, 0xffffffff, | |
76 | 0xffffffff, true), | |
77 | HOWTO(R_X86_64_32, 0, 2, 32, false, 0, complain_overflow_unsigned, | |
78 | bfd_elf_generic_reloc, "R_X86_64_32", false, 0xffffffff, 0xffffffff, | |
79 | false), | |
80 | HOWTO(R_X86_64_32S, 0, 2, 32, false, 0, complain_overflow_signed, | |
81 | bfd_elf_generic_reloc, "R_X86_64_32S", false, 0xffffffff, 0xffffffff, | |
82 | false), | |
83 | HOWTO(R_X86_64_16, 0, 1, 16, false, 0, complain_overflow_bitfield, | |
84 | bfd_elf_generic_reloc, "R_X86_64_16", false, 0xffff, 0xffff, false), | |
85 | HOWTO(R_X86_64_PC16,0, 1, 16, true, 0, complain_overflow_bitfield, | |
86 | bfd_elf_generic_reloc, "R_X86_64_PC16", false, 0xffff, 0xffff, true), | |
87 | HOWTO(R_X86_64_8, 0, 0, 8, false, 0, complain_overflow_bitfield, | |
88 | bfd_elf_generic_reloc, "R_X86_64_8", false, 0xff, 0xff, false), | |
89 | HOWTO(R_X86_64_PC8, 0, 0, 8, true, 0, complain_overflow_signed, | |
90 | bfd_elf_generic_reloc, "R_X86_64_PC8", false, 0xff, 0xff, true), | |
91 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, false, 0, complain_overflow_bitfield, | |
92 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", false, MINUS_ONE, | |
93 | MINUS_ONE, false), | |
94 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, false, 0, complain_overflow_bitfield, | |
95 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", false, MINUS_ONE, | |
96 | MINUS_ONE, false), | |
97 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, false, 0, complain_overflow_bitfield, | |
98 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", false, MINUS_ONE, | |
99 | MINUS_ONE, false), | |
100 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, true, 0, complain_overflow_signed, | |
101 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", false, 0xffffffff, | |
102 | 0xffffffff, true), | |
103 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, true, 0, complain_overflow_signed, | |
104 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", false, 0xffffffff, | |
105 | 0xffffffff, true), | |
106 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, false, 0, complain_overflow_signed, | |
107 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", false, 0xffffffff, | |
108 | 0xffffffff, false), | |
109 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, true, 0, complain_overflow_signed, | |
110 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", false, 0xffffffff, | |
111 | 0xffffffff, true), | |
112 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, false, 0, complain_overflow_signed, | |
113 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", false, 0xffffffff, | |
114 | 0xffffffff, false), | |
115 | HOWTO(R_X86_64_PC64, 0, 4, 64, true, 0, complain_overflow_bitfield, | |
116 | bfd_elf_generic_reloc, "R_X86_64_PC64", false, MINUS_ONE, MINUS_ONE, | |
117 | true), | |
118 | HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, false, 0, complain_overflow_bitfield, | |
d6ab8113 | 119 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", |
0a1b45a2 AM |
120 | false, MINUS_ONE, MINUS_ONE, false), |
121 | HOWTO(R_X86_64_GOTPC32, 0, 2, 32, true, 0, complain_overflow_signed, | |
d6ab8113 | 122 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", |
0a1b45a2 AM |
123 | false, 0xffffffff, 0xffffffff, true), |
124 | HOWTO(R_X86_64_GOT64, 0, 4, 64, false, 0, complain_overflow_signed, | |
125 | bfd_elf_generic_reloc, "R_X86_64_GOT64", false, MINUS_ONE, MINUS_ONE, | |
126 | false), | |
127 | HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, true, 0, complain_overflow_signed, | |
128 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", false, MINUS_ONE, | |
129 | MINUS_ONE, true), | |
130 | HOWTO(R_X86_64_GOTPC64, 0, 4, 64, true, 0, complain_overflow_signed, | |
7b81dfbb | 131 | bfd_elf_generic_reloc, "R_X86_64_GOTPC64", |
0a1b45a2 AM |
132 | false, MINUS_ONE, MINUS_ONE, true), |
133 | HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, false, 0, complain_overflow_signed, | |
134 | bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", false, MINUS_ONE, | |
135 | MINUS_ONE, false), | |
136 | HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, false, 0, complain_overflow_signed, | |
137 | bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", false, MINUS_ONE, | |
138 | MINUS_ONE, false), | |
139 | HOWTO(R_X86_64_SIZE32, 0, 2, 32, false, 0, complain_overflow_unsigned, | |
140 | bfd_elf_generic_reloc, "R_X86_64_SIZE32", false, 0xffffffff, 0xffffffff, | |
141 | false), | |
142 | HOWTO(R_X86_64_SIZE64, 0, 4, 64, false, 0, complain_overflow_unsigned, | |
143 | bfd_elf_generic_reloc, "R_X86_64_SIZE64", false, MINUS_ONE, MINUS_ONE, | |
144 | false), | |
145 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, true, 0, | |
67a4f2b7 AO |
146 | complain_overflow_bitfield, bfd_elf_generic_reloc, |
147 | "R_X86_64_GOTPC32_TLSDESC", | |
0a1b45a2 AM |
148 | false, 0xffffffff, 0xffffffff, true), |
149 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, false, 0, | |
67a4f2b7 AO |
150 | complain_overflow_dont, bfd_elf_generic_reloc, |
151 | "R_X86_64_TLSDESC_CALL", | |
0a1b45a2 AM |
152 | false, 0, 0, false), |
153 | HOWTO(R_X86_64_TLSDESC, 0, 4, 64, false, 0, | |
67a4f2b7 AO |
154 | complain_overflow_bitfield, bfd_elf_generic_reloc, |
155 | "R_X86_64_TLSDESC", | |
0a1b45a2 AM |
156 | false, MINUS_ONE, MINUS_ONE, false), |
157 | HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, false, 0, complain_overflow_bitfield, | |
158 | bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", false, MINUS_ONE, | |
159 | MINUS_ONE, false), | |
160 | HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, false, 0, complain_overflow_bitfield, | |
161 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", false, MINUS_ONE, | |
162 | MINUS_ONE, false), | |
163 | HOWTO(R_X86_64_PC32_BND, 0, 2, 32, true, 0, complain_overflow_signed, | |
164 | bfd_elf_generic_reloc, "R_X86_64_PC32_BND", false, 0xffffffff, 0xffffffff, | |
165 | true), | |
166 | HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, true, 0, complain_overflow_signed, | |
167 | bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", false, 0xffffffff, 0xffffffff, | |
168 | true), | |
169 | HOWTO(R_X86_64_GOTPCRELX, 0, 2, 32, true, 0, complain_overflow_signed, | |
170 | bfd_elf_generic_reloc, "R_X86_64_GOTPCRELX", false, 0xffffffff, | |
171 | 0xffffffff, true), | |
172 | HOWTO(R_X86_64_REX_GOTPCRELX, 0, 2, 32, true, 0, complain_overflow_signed, | |
173 | bfd_elf_generic_reloc, "R_X86_64_REX_GOTPCRELX", false, 0xffffffff, | |
174 | 0xffffffff, true), | |
fe4770f4 | 175 | |
a33d77bc JB |
176 | /* We have a gap in the reloc numbers here. |
177 | R_X86_64_standard counts the number up to this point, and | |
178 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
179 | R_X86_64_GNU_VT* to form an index into this table. */ | |
56ceb5b5 | 180 | #define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1) |
a33d77bc JB |
181 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
182 | ||
fe4770f4 | 183 | /* GNU extension to record C++ vtable hierarchy. */ |
0a1b45a2 AM |
184 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, false, 0, complain_overflow_dont, |
185 | NULL, "R_X86_64_GNU_VTINHERIT", false, 0, 0, false), | |
fe4770f4 AJ |
186 | |
187 | /* GNU extension to record C++ vtable member usage. */ | |
0a1b45a2 AM |
188 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, false, 0, complain_overflow_dont, |
189 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", false, 0, 0, | |
190 | false), | |
d7921315 L |
191 | |
192 | /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */ | |
0a1b45a2 AM |
193 | HOWTO(R_X86_64_32, 0, 2, 32, false, 0, complain_overflow_bitfield, |
194 | bfd_elf_generic_reloc, "R_X86_64_32", false, 0xffffffff, 0xffffffff, | |
195 | false) | |
8d88c4ca NC |
196 | }; |
197 | ||
daf1c414 | 198 | #define X86_PCREL_TYPE_P(TYPE) \ |
d8045f23 NC |
199 | ( ((TYPE) == R_X86_64_PC8) \ |
200 | || ((TYPE) == R_X86_64_PC16) \ | |
201 | || ((TYPE) == R_X86_64_PC32) \ | |
c3320543 | 202 | || ((TYPE) == R_X86_64_PC32_BND) \ |
d8045f23 NC |
203 | || ((TYPE) == R_X86_64_PC64)) |
204 | ||
aebcc8ff L |
205 | #define X86_SIZE_TYPE_P(TYPE) \ |
206 | ((TYPE) == R_X86_64_SIZE32 || (TYPE) == R_X86_64_SIZE64) | |
207 | ||
8d88c4ca | 208 | /* Map BFD relocs to the x86_64 elf relocs. */ |
70256ad8 AJ |
209 | struct elf_reloc_map |
210 | { | |
8d88c4ca NC |
211 | bfd_reloc_code_real_type bfd_reloc_val; |
212 | unsigned char elf_reloc_val; | |
213 | }; | |
214 | ||
dc810e39 | 215 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 216 | { |
70256ad8 AJ |
217 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
218 | { BFD_RELOC_64, R_X86_64_64, }, | |
219 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
220 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
221 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
222 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
223 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
224 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
225 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
226 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
227 | { BFD_RELOC_32, R_X86_64_32, }, | |
228 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
229 | { BFD_RELOC_16, R_X86_64_16, }, | |
230 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
231 | { BFD_RELOC_8, R_X86_64_8, }, | |
232 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
233 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
234 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
235 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
236 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
237 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
238 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
239 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
240 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
241 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
242 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
243 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
244 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
245 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
246 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
247 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
248 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
1788fc08 L |
249 | { BFD_RELOC_SIZE32, R_X86_64_SIZE32, }, |
250 | { BFD_RELOC_SIZE64, R_X86_64_SIZE64, }, | |
67a4f2b7 AO |
251 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
252 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
253 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
cbe950e9 | 254 | { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, }, |
56ceb5b5 L |
255 | { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND, }, |
256 | { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND, }, | |
257 | { BFD_RELOC_X86_64_GOTPCRELX, R_X86_64_GOTPCRELX, }, | |
258 | { BFD_RELOC_X86_64_REX_GOTPCRELX, R_X86_64_REX_GOTPCRELX, }, | |
fe4770f4 AJ |
259 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
260 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
261 | }; |
262 | ||
67a4f2b7 | 263 | static reloc_howto_type * |
351f65ca | 264 | elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) |
67a4f2b7 AO |
265 | { |
266 | unsigned i; | |
267 | ||
d7921315 L |
268 | if (r_type == (unsigned int) R_X86_64_32) |
269 | { | |
270 | if (ABI_64_P (abfd)) | |
271 | i = r_type; | |
272 | else | |
273 | i = ARRAY_SIZE (x86_64_elf_howto_table) - 1; | |
274 | } | |
275 | else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
276 | || r_type >= (unsigned int) R_X86_64_max) | |
67a4f2b7 AO |
277 | { |
278 | if (r_type >= (unsigned int) R_X86_64_standard) | |
279 | { | |
695344c0 | 280 | /* xgettext:c-format */ |
0aa13fee AM |
281 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
282 | abfd, r_type); | |
f3185997 NC |
283 | bfd_set_error (bfd_error_bad_value); |
284 | return NULL; | |
67a4f2b7 AO |
285 | } |
286 | i = r_type; | |
287 | } | |
288 | else | |
289 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
290 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
291 | return &x86_64_elf_howto_table[i]; | |
292 | } | |
8d88c4ca NC |
293 | |
294 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
295 | static reloc_howto_type * | |
351f65ca L |
296 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
297 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
298 | { |
299 | unsigned int i; | |
27482721 | 300 | |
8d88c4ca NC |
301 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
302 | i++) | |
303 | { | |
304 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
305 | return elf_x86_64_rtype_to_howto (abfd, |
306 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca | 307 | } |
5860e3f8 | 308 | return NULL; |
8d88c4ca NC |
309 | } |
310 | ||
157090f7 | 311 | static reloc_howto_type * |
d7921315 | 312 | elf_x86_64_reloc_name_lookup (bfd *abfd, |
351f65ca | 313 | const char *r_name) |
157090f7 AM |
314 | { |
315 | unsigned int i; | |
316 | ||
d7921315 L |
317 | if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0) |
318 | { | |
319 | /* Get x32 R_X86_64_32. */ | |
320 | reloc_howto_type *reloc | |
321 | = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1]; | |
322 | BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32); | |
323 | return reloc; | |
324 | } | |
325 | ||
326 | for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++) | |
157090f7 AM |
327 | if (x86_64_elf_howto_table[i].name != NULL |
328 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
329 | return &x86_64_elf_howto_table[i]; | |
330 | ||
331 | return NULL; | |
332 | } | |
333 | ||
8d88c4ca | 334 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 335 | |
0a1b45a2 | 336 | static bool |
f3185997 | 337 | elf_x86_64_info_to_howto (bfd *abfd, arelent *cache_ptr, |
351f65ca | 338 | Elf_Internal_Rela *dst) |
8d88c4ca | 339 | { |
67a4f2b7 | 340 | unsigned r_type; |
8d88c4ca | 341 | |
351f65ca L |
342 | r_type = ELF32_R_TYPE (dst->r_info); |
343 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); | |
f3185997 | 344 | if (cache_ptr->howto == NULL) |
0a1b45a2 | 345 | return false; |
262c0a87 | 346 | BFD_ASSERT (r_type == cache_ptr->howto->type || cache_ptr->howto->type == R_X86_64_NONE); |
0a1b45a2 | 347 | return true; |
8d88c4ca | 348 | } |
70256ad8 | 349 | \f |
3bab7989 | 350 | /* Support for core dump NOTE sections. */ |
0a1b45a2 | 351 | static bool |
351f65ca | 352 | elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
353 | { |
354 | int offset; | |
eea6121a | 355 | size_t size; |
3bab7989 ML |
356 | |
357 | switch (note->descsz) | |
358 | { | |
359 | default: | |
0a1b45a2 | 360 | return false; |
3bab7989 | 361 | |
bcd823f1 L |
362 | case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */ |
363 | /* pr_cursig */ | |
228e534f | 364 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
bcd823f1 L |
365 | |
366 | /* pr_pid */ | |
228e534f | 367 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
bcd823f1 L |
368 | |
369 | /* pr_reg */ | |
370 | offset = 72; | |
371 | size = 216; | |
372 | ||
373 | break; | |
374 | ||
3bab7989 ML |
375 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ |
376 | /* pr_cursig */ | |
228e534f | 377 | elf_tdata (abfd)->core->signal |
3bab7989 ML |
378 | = bfd_get_16 (abfd, note->descdata + 12); |
379 | ||
380 | /* pr_pid */ | |
228e534f | 381 | elf_tdata (abfd)->core->lwpid |
3bab7989 ML |
382 | = bfd_get_32 (abfd, note->descdata + 32); |
383 | ||
384 | /* pr_reg */ | |
385 | offset = 112; | |
eea6121a | 386 | size = 216; |
3bab7989 ML |
387 | |
388 | break; | |
389 | } | |
390 | ||
391 | /* Make a ".reg/999" section. */ | |
392 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 393 | size, note->descpos + offset); |
3bab7989 ML |
394 | } |
395 | ||
0a1b45a2 | 396 | static bool |
351f65ca | 397 | elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
398 | { |
399 | switch (note->descsz) | |
400 | { | |
401 | default: | |
0a1b45a2 | 402 | return false; |
3bab7989 | 403 | |
bcd823f1 | 404 | case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */ |
228e534f | 405 | elf_tdata (abfd)->core->pid |
bcd823f1 | 406 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 407 | elf_tdata (abfd)->core->program |
bcd823f1 | 408 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 409 | elf_tdata (abfd)->core->command |
bcd823f1 L |
410 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
411 | break; | |
412 | ||
3bab7989 | 413 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ |
228e534f | 414 | elf_tdata (abfd)->core->pid |
261b8d08 | 415 | = bfd_get_32 (abfd, note->descdata + 24); |
228e534f | 416 | elf_tdata (abfd)->core->program |
3bab7989 | 417 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
228e534f | 418 | elf_tdata (abfd)->core->command |
3bab7989 ML |
419 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
420 | } | |
421 | ||
422 | /* Note that for some reason, a spurious space is tacked | |
423 | onto the end of the args in some (at least one anyway) | |
424 | implementations, so strip it off if it exists. */ | |
425 | ||
426 | { | |
228e534f | 427 | char *command = elf_tdata (abfd)->core->command; |
3bab7989 ML |
428 | int n = strlen (command); |
429 | ||
430 | if (0 < n && command[n - 1] == ' ') | |
431 | command[n - 1] = '\0'; | |
432 | } | |
433 | ||
0a1b45a2 | 434 | return true; |
3bab7989 | 435 | } |
8fd79e71 L |
436 | |
437 | #ifdef CORE_HEADER | |
602f1657 AM |
438 | # if GCC_VERSION >= 8000 |
439 | # pragma GCC diagnostic push | |
440 | # pragma GCC diagnostic ignored "-Wstringop-truncation" | |
441 | # endif | |
8fd79e71 L |
442 | static char * |
443 | elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz, | |
444 | int note_type, ...) | |
445 | { | |
446 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8fd79e71 L |
447 | va_list ap; |
448 | const char *fname, *psargs; | |
449 | long pid; | |
450 | int cursig; | |
451 | const void *gregs; | |
452 | ||
453 | switch (note_type) | |
454 | { | |
455 | default: | |
456 | return NULL; | |
457 | ||
458 | case NT_PRPSINFO: | |
459 | va_start (ap, note_type); | |
460 | fname = va_arg (ap, const char *); | |
461 | psargs = va_arg (ap, const char *); | |
462 | va_end (ap); | |
463 | ||
464 | if (bed->s->elfclass == ELFCLASS32) | |
465 | { | |
466 | prpsinfo32_t data; | |
467 | memset (&data, 0, sizeof (data)); | |
468 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
469 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
470 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
471 | &data, sizeof (data)); | |
8fd79e71 L |
472 | } |
473 | else | |
474 | { | |
b1bd052d | 475 | prpsinfo64_t data; |
8fd79e71 L |
476 | memset (&data, 0, sizeof (data)); |
477 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
478 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
479 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
480 | &data, sizeof (data)); | |
8fd79e71 | 481 | } |
e85c6a70 | 482 | /* NOTREACHED */ |
8fd79e71 L |
483 | |
484 | case NT_PRSTATUS: | |
485 | va_start (ap, note_type); | |
486 | pid = va_arg (ap, long); | |
487 | cursig = va_arg (ap, int); | |
488 | gregs = va_arg (ap, const void *); | |
489 | va_end (ap); | |
490 | ||
491 | if (bed->s->elfclass == ELFCLASS32) | |
492 | { | |
493 | if (bed->elf_machine_code == EM_X86_64) | |
494 | { | |
495 | prstatusx32_t prstat; | |
496 | memset (&prstat, 0, sizeof (prstat)); | |
497 | prstat.pr_pid = pid; | |
498 | prstat.pr_cursig = cursig; | |
499 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
500 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
501 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
502 | } |
503 | else | |
504 | { | |
505 | prstatus32_t prstat; | |
506 | memset (&prstat, 0, sizeof (prstat)); | |
507 | prstat.pr_pid = pid; | |
508 | prstat.pr_cursig = cursig; | |
509 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
510 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
511 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
512 | } |
513 | } | |
514 | else | |
515 | { | |
b1bd052d | 516 | prstatus64_t prstat; |
8fd79e71 L |
517 | memset (&prstat, 0, sizeof (prstat)); |
518 | prstat.pr_pid = pid; | |
519 | prstat.pr_cursig = cursig; | |
520 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
521 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
522 | &prstat, sizeof (prstat)); | |
8fd79e71 | 523 | } |
8fd79e71 | 524 | } |
e85c6a70 | 525 | /* NOTREACHED */ |
8fd79e71 | 526 | } |
602f1657 AM |
527 | # if GCC_VERSION >= 8000 |
528 | # pragma GCC diagnostic pop | |
529 | # endif | |
8fd79e71 | 530 | #endif |
3bab7989 | 531 | \f |
407443a3 | 532 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 533 | |
70256ad8 AJ |
534 | /* The size in bytes of an entry in the global offset table. */ |
535 | ||
536 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 537 | |
38b12349 | 538 | /* The size in bytes of an entry in the lazy procedure linkage table. */ |
8d88c4ca | 539 | |
38b12349 | 540 | #define LAZY_PLT_ENTRY_SIZE 16 |
70256ad8 | 541 | |
38b12349 L |
542 | /* The size in bytes of an entry in the non-lazy procedure linkage |
543 | table. */ | |
70256ad8 | 544 | |
38b12349 L |
545 | #define NON_LAZY_PLT_ENTRY_SIZE 8 |
546 | ||
547 | /* The first entry in a lazy procedure linkage table looks like this. | |
548 | See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this | |
549 | works. */ | |
550 | ||
551 | static const bfd_byte elf_x86_64_lazy_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
70256ad8 | 552 | { |
653165cc AJ |
553 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
554 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 555 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
556 | }; |
557 | ||
38b12349 | 558 | /* Subsequent entries in a lazy procedure linkage table look like this. */ |
70256ad8 | 559 | |
38b12349 | 560 | static const bfd_byte elf_x86_64_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
70256ad8 | 561 | { |
653165cc | 562 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 563 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 564 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
565 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
566 | 0xe9, /* jmp relative */ | |
567 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
568 | }; | |
569 | ||
38b12349 | 570 | /* The first entry in a lazy procedure linkage table with BND prefix |
0ff2b86e L |
571 | like this. */ |
572 | ||
38b12349 | 573 | static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 574 | { |
07d6d2b8 | 575 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
0ff2b86e | 576 | 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */ |
07d6d2b8 | 577 | 0x0f, 0x1f, 0 /* nopl (%rax) */ |
0ff2b86e L |
578 | }; |
579 | ||
38b12349 L |
580 | /* Subsequent entries for branches with BND prefx in a lazy procedure |
581 | linkage table look like this. */ | |
0ff2b86e | 582 | |
38b12349 | 583 | static const bfd_byte elf_x86_64_lazy_bnd_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 584 | { |
07d6d2b8 AM |
585 | 0x68, 0, 0, 0, 0, /* pushq immediate */ |
586 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
587 | 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */ | |
0ff2b86e L |
588 | }; |
589 | ||
ee2fdd6f L |
590 | /* The first entry in the IBT-enabled lazy procedure linkage table is the |
591 | the same as the lazy PLT with BND prefix so that bound registers are | |
592 | preserved when control is passed to dynamic linker. Subsequent | |
593 | entries for a IBT-enabled lazy procedure linkage table look like | |
594 | this. */ | |
595 | ||
596 | static const bfd_byte elf_x86_64_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
597 | { | |
07d6d2b8 AM |
598 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
599 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
600 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
601 | 0x90 /* nop */ | |
ee2fdd6f L |
602 | }; |
603 | ||
604 | /* The first entry in the x32 IBT-enabled lazy procedure linkage table | |
de194d85 | 605 | is the same as the normal lazy PLT. Subsequent entries for an |
ee2fdd6f L |
606 | x32 IBT-enabled lazy procedure linkage table look like this. */ |
607 | ||
608 | static const bfd_byte elf_x32_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
609 | { | |
07d6d2b8 AM |
610 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
611 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
612 | 0xe9, 0, 0, 0, 0, /* jmpq relative */ | |
613 | 0x66, 0x90 /* xchg %ax,%ax */ | |
ee2fdd6f L |
614 | }; |
615 | ||
38b12349 | 616 | /* Entries in the non-lazey procedure linkage table look like this. */ |
0ff2b86e | 617 | |
38b12349 | 618 | static const bfd_byte elf_x86_64_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 619 | { |
07d6d2b8 AM |
620 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
621 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
622 | 0x66, 0x90 /* xchg %ax,%ax */ | |
0ff2b86e L |
623 | }; |
624 | ||
38b12349 L |
625 | /* Entries for branches with BND prefix in the non-lazey procedure |
626 | linkage table look like this. */ | |
0ff2b86e | 627 | |
38b12349 | 628 | static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 629 | { |
07d6d2b8 AM |
630 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ |
631 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
632 | 0x90 /* nop */ | |
0ff2b86e L |
633 | }; |
634 | ||
ee2fdd6f L |
635 | /* Entries for branches with IBT-enabled in the non-lazey procedure |
636 | linkage table look like this. They have the same size as the lazy | |
637 | PLT entry. */ | |
638 | ||
639 | static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
640 | { | |
07d6d2b8 AM |
641 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
642 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ | |
ee2fdd6f | 643 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
07d6d2b8 | 644 | 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */ |
ee2fdd6f L |
645 | }; |
646 | ||
647 | /* Entries for branches with IBT-enabled in the x32 non-lazey procedure | |
648 | linkage table look like this. They have the same size as the lazy | |
649 | PLT entry. */ | |
650 | ||
651 | static const bfd_byte elf_x32_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
652 | { | |
07d6d2b8 AM |
653 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
654 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ | |
ee2fdd6f L |
655 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
656 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
657 | }; | |
658 | ||
92e68c1d L |
659 | /* The TLSDESC entry in a lazy procedure linkage table. */ |
660 | static const bfd_byte elf_x86_64_tlsdesc_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
661 | { | |
662 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
663 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
664 | 0xff, 0x25, 16, 0, 0, 0 /* jmpq *GOT+TDG(%rip) */ | |
665 | }; | |
666 | ||
38b12349 | 667 | /* .eh_frame covering the lazy .plt section. */ |
e41b3a13 | 668 | |
38b12349 | 669 | static const bfd_byte elf_x86_64_eh_frame_lazy_plt[] = |
e41b3a13 | 670 | { |
e41b3a13 JJ |
671 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ |
672 | 0, 0, 0, 0, /* CIE ID */ | |
673 | 1, /* CIE version */ | |
674 | 'z', 'R', 0, /* Augmentation string */ | |
675 | 1, /* Code alignment factor */ | |
676 | 0x78, /* Data alignment factor */ | |
677 | 16, /* Return address column */ | |
678 | 1, /* Augmentation size */ | |
679 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
680 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
681 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
682 | DW_CFA_nop, DW_CFA_nop, | |
683 | ||
684 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
685 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
686 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
687 | 0, 0, 0, 0, /* .plt size goes here */ | |
688 | 0, /* Augmentation size */ | |
689 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
690 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
691 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
692 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
693 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
694 | 11, /* Block length */ | |
695 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
696 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
697 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
698 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
699 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
700 | }; | |
701 | ||
38b12349 | 702 | /* .eh_frame covering the lazy BND .plt section. */ |
9e659176 | 703 | |
38b12349 | 704 | static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt[] = |
9e659176 L |
705 | { |
706 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
707 | 0, 0, 0, 0, /* CIE ID */ | |
708 | 1, /* CIE version */ | |
709 | 'z', 'R', 0, /* Augmentation string */ | |
710 | 1, /* Code alignment factor */ | |
711 | 0x78, /* Data alignment factor */ | |
712 | 16, /* Return address column */ | |
713 | 1, /* Augmentation size */ | |
714 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
715 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
716 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
717 | DW_CFA_nop, DW_CFA_nop, | |
718 | ||
719 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
720 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
721 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
722 | 0, 0, 0, 0, /* .plt size goes here */ | |
723 | 0, /* Augmentation size */ | |
724 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
725 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
726 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
727 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
728 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
729 | 11, /* Block length */ | |
730 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
731 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
732 | DW_OP_lit15, DW_OP_and, DW_OP_lit5, DW_OP_ge, | |
733 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
734 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
735 | }; | |
736 | ||
ee2fdd6f L |
737 | /* .eh_frame covering the lazy .plt section with IBT-enabled. */ |
738 | ||
739 | static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt[] = | |
740 | { | |
741 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
742 | 0, 0, 0, 0, /* CIE ID */ | |
743 | 1, /* CIE version */ | |
744 | 'z', 'R', 0, /* Augmentation string */ | |
745 | 1, /* Code alignment factor */ | |
746 | 0x78, /* Data alignment factor */ | |
747 | 16, /* Return address column */ | |
748 | 1, /* Augmentation size */ | |
749 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
750 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
751 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
752 | DW_CFA_nop, DW_CFA_nop, | |
753 | ||
754 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
755 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
756 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
757 | 0, 0, 0, 0, /* .plt size goes here */ | |
758 | 0, /* Augmentation size */ | |
759 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
760 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
761 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
762 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
763 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
764 | 11, /* Block length */ | |
765 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
766 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
767 | DW_OP_lit15, DW_OP_and, DW_OP_lit10, DW_OP_ge, | |
768 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
769 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
770 | }; | |
771 | ||
772 | /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */ | |
773 | ||
774 | static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt[] = | |
775 | { | |
776 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
777 | 0, 0, 0, 0, /* CIE ID */ | |
778 | 1, /* CIE version */ | |
779 | 'z', 'R', 0, /* Augmentation string */ | |
780 | 1, /* Code alignment factor */ | |
781 | 0x78, /* Data alignment factor */ | |
782 | 16, /* Return address column */ | |
783 | 1, /* Augmentation size */ | |
784 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
785 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
786 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
787 | DW_CFA_nop, DW_CFA_nop, | |
788 | ||
789 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
790 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
791 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
792 | 0, 0, 0, 0, /* .plt size goes here */ | |
793 | 0, /* Augmentation size */ | |
794 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
795 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
796 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
797 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
798 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
799 | 11, /* Block length */ | |
800 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
801 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
802 | DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge, | |
803 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
804 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
805 | }; | |
806 | ||
38b12349 | 807 | /* .eh_frame covering the non-lazy .plt section. */ |
fff53dae | 808 | |
38b12349 | 809 | static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt[] = |
fff53dae L |
810 | { |
811 | #define PLT_GOT_FDE_LENGTH 20 | |
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_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
826 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
38b12349 L |
827 | 0, 0, 0, 0, /* the start of non-lazy .plt goes here */ |
828 | 0, 0, 0, 0, /* non-lazy .plt size goes here */ | |
fff53dae L |
829 | 0, /* Augmentation size */ |
830 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, | |
831 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
832 | }; | |
833 | ||
eed180f8 | 834 | /* These are the standard parameters. */ |
765e526c | 835 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt = |
eed180f8 | 836 | { |
07d6d2b8 AM |
837 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ |
838 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
839 | elf_x86_64_lazy_plt_entry, /* plt_entry */ | |
840 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
841 | elf_x86_64_tlsdesc_plt_entry, /* plt_tlsdesc_entry */ |
842 | LAZY_PLT_ENTRY_SIZE, /* plt_tlsdesc_entry_size */ | |
843 | 6, /* plt_tlsdesc_got1_offset */ | |
844 | 12, /* plt_tlsdesc_got2_offset */ | |
845 | 10, /* plt_tlsdesc_got1_insn_end */ | |
846 | 16, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
847 | 2, /* plt0_got1_offset */ |
848 | 8, /* plt0_got2_offset */ | |
849 | 12, /* plt0_got2_insn_end */ | |
850 | 2, /* plt_got_offset */ | |
851 | 7, /* plt_reloc_offset */ | |
852 | 12, /* plt_plt_offset */ | |
853 | 6, /* plt_got_insn_size */ | |
854 | LAZY_PLT_ENTRY_SIZE, /* plt_plt_insn_end */ | |
855 | 6, /* plt_lazy_offset */ | |
856 | elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */ | |
857 | elf_x86_64_lazy_plt_entry, /* pic_plt_entry */ | |
858 | elf_x86_64_eh_frame_lazy_plt, /* eh_frame_plt */ | |
38b12349 L |
859 | sizeof (elf_x86_64_eh_frame_lazy_plt) /* eh_frame_plt_size */ |
860 | }; | |
861 | ||
765e526c | 862 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_plt = |
38b12349 | 863 | { |
07d6d2b8 AM |
864 | elf_x86_64_non_lazy_plt_entry, /* plt_entry */ |
865 | elf_x86_64_non_lazy_plt_entry, /* pic_plt_entry */ | |
866 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
867 | 2, /* plt_got_offset */ | |
868 | 6, /* plt_got_insn_size */ | |
869 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
38b12349 | 870 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
eed180f8 RM |
871 | }; |
872 | ||
765e526c | 873 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_bnd_plt = |
0ff2b86e | 874 | { |
07d6d2b8 AM |
875 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ |
876 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
877 | elf_x86_64_lazy_bnd_plt_entry, /* plt_entry */ | |
878 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
879 | elf_x86_64_tlsdesc_plt_entry, /* plt_tlsdesc_entry */ |
880 | LAZY_PLT_ENTRY_SIZE, /* plt_tlsdesc_entry_size */ | |
881 | 6, /* plt_tlsdesc_got1_offset */ | |
882 | 12, /* plt_tlsdesc_got2_offset */ | |
883 | 10, /* plt_tlsdesc_got1_insn_end */ | |
884 | 16, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
885 | 2, /* plt0_got1_offset */ |
886 | 1+8, /* plt0_got2_offset */ | |
887 | 1+12, /* plt0_got2_insn_end */ | |
888 | 1+2, /* plt_got_offset */ | |
889 | 1, /* plt_reloc_offset */ | |
890 | 7, /* plt_plt_offset */ | |
891 | 1+6, /* plt_got_insn_size */ | |
892 | 11, /* plt_plt_insn_end */ | |
893 | 0, /* plt_lazy_offset */ | |
894 | elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */ | |
895 | elf_x86_64_lazy_bnd_plt_entry, /* pic_plt_entry */ | |
896 | elf_x86_64_eh_frame_lazy_bnd_plt, /* eh_frame_plt */ | |
38b12349 L |
897 | sizeof (elf_x86_64_eh_frame_lazy_bnd_plt) /* eh_frame_plt_size */ |
898 | }; | |
899 | ||
765e526c | 900 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt = |
38b12349 | 901 | { |
07d6d2b8 AM |
902 | elf_x86_64_non_lazy_bnd_plt_entry, /* plt_entry */ |
903 | elf_x86_64_non_lazy_bnd_plt_entry, /* pic_plt_entry */ | |
904 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
905 | 1+2, /* plt_got_offset */ | |
906 | 1+6, /* plt_got_insn_size */ | |
907 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
38b12349 L |
908 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
909 | }; | |
910 | ||
765e526c | 911 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt = |
ee2fdd6f | 912 | { |
07d6d2b8 AM |
913 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ |
914 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
915 | elf_x86_64_lazy_ibt_plt_entry, /* plt_entry */ | |
916 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
917 | elf_x86_64_tlsdesc_plt_entry, /* plt_tlsdesc_entry */ |
918 | LAZY_PLT_ENTRY_SIZE, /* plt_tlsdesc_entry_size */ | |
919 | 6, /* plt_tlsdesc_got1_offset */ | |
920 | 12, /* plt_tlsdesc_got2_offset */ | |
921 | 10, /* plt_tlsdesc_got1_insn_end */ | |
922 | 16, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
923 | 2, /* plt0_got1_offset */ |
924 | 1+8, /* plt0_got2_offset */ | |
925 | 1+12, /* plt0_got2_insn_end */ | |
926 | 4+1+2, /* plt_got_offset */ | |
927 | 4+1, /* plt_reloc_offset */ | |
928 | 4+1+6, /* plt_plt_offset */ | |
929 | 4+1+6, /* plt_got_insn_size */ | |
930 | 4+1+5+5, /* plt_plt_insn_end */ | |
931 | 0, /* plt_lazy_offset */ | |
932 | elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */ | |
933 | elf_x86_64_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
934 | elf_x86_64_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
935 | sizeof (elf_x86_64_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ |
936 | }; | |
937 | ||
765e526c | 938 | static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt = |
ee2fdd6f | 939 | { |
07d6d2b8 AM |
940 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ |
941 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
942 | elf_x32_lazy_ibt_plt_entry, /* plt_entry */ | |
943 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
944 | elf_x86_64_tlsdesc_plt_entry, /* plt_tlsdesc_entry */ |
945 | LAZY_PLT_ENTRY_SIZE, /* plt_tlsdesc_entry_size */ | |
946 | 6, /* plt_tlsdesc_got1_offset */ | |
947 | 12, /* plt_tlsdesc_got2_offset */ | |
948 | 10, /* plt_tlsdesc_got1_insn_end */ | |
949 | 16, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
950 | 2, /* plt0_got1_offset */ |
951 | 8, /* plt0_got2_offset */ | |
952 | 12, /* plt0_got2_insn_end */ | |
953 | 4+2, /* plt_got_offset */ | |
954 | 4+1, /* plt_reloc_offset */ | |
955 | 4+6, /* plt_plt_offset */ | |
956 | 4+6, /* plt_got_insn_size */ | |
957 | 4+5+5, /* plt_plt_insn_end */ | |
958 | 0, /* plt_lazy_offset */ | |
959 | elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */ | |
960 | elf_x32_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
961 | elf_x32_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
962 | sizeof (elf_x32_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ |
963 | }; | |
964 | ||
765e526c | 965 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt = |
ee2fdd6f | 966 | { |
07d6d2b8 AM |
967 | elf_x86_64_non_lazy_ibt_plt_entry, /* plt_entry */ |
968 | elf_x86_64_non_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
969 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
970 | 4+1+2, /* plt_got_offset */ | |
971 | 4+1+6, /* plt_got_insn_size */ | |
972 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
973 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
974 | }; | |
975 | ||
765e526c | 976 | static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt = |
ee2fdd6f | 977 | { |
07d6d2b8 AM |
978 | elf_x32_non_lazy_ibt_plt_entry, /* plt_entry */ |
979 | elf_x32_non_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
980 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
981 | 4+2, /* plt_got_offset */ | |
982 | 4+6, /* plt_got_insn_size */ | |
983 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
984 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
985 | }; | |
986 | ||
eed180f8 | 987 | |
0a1b45a2 | 988 | static bool |
27482721 | 989 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 990 | { |
8d88c4ca NC |
991 | /* Set the right machine number for an x86-64 elf64 file. */ |
992 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
0a1b45a2 | 993 | return true; |
8d88c4ca NC |
994 | } |
995 | ||
0a1b45a2 | 996 | static bool |
8059fb19 RM |
997 | elf32_x86_64_elf_object_p (bfd *abfd) |
998 | { | |
999 | /* Set the right machine number for an x86-64 elf32 file. */ | |
1000 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
0a1b45a2 | 1001 | return true; |
8059fb19 RM |
1002 | } |
1003 | ||
142411ca L |
1004 | /* Return TRUE if the TLS access code sequence support transition |
1005 | from R_TYPE. */ | |
1006 | ||
0a1b45a2 | 1007 | static bool |
351f65ca L |
1008 | elf_x86_64_check_tls_transition (bfd *abfd, |
1009 | struct bfd_link_info *info, | |
1010 | asection *sec, | |
1011 | bfd_byte *contents, | |
1012 | Elf_Internal_Shdr *symtab_hdr, | |
1013 | struct elf_link_hash_entry **sym_hashes, | |
1014 | unsigned int r_type, | |
1015 | const Elf_Internal_Rela *rel, | |
1016 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1017 | { |
142411ca L |
1018 | unsigned int val; |
1019 | unsigned long r_symndx; | |
0a1b45a2 | 1020 | bool largepic = false; |
142411ca L |
1021 | struct elf_link_hash_entry *h; |
1022 | bfd_vma offset; | |
0afcef53 | 1023 | struct elf_x86_link_hash_table *htab; |
e2cbcd91 | 1024 | bfd_byte *call; |
0a1b45a2 | 1025 | bool indirect_call; |
142411ca | 1026 | |
0afcef53 | 1027 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
142411ca | 1028 | offset = rel->r_offset; |
bffbf940 | 1029 | switch (r_type) |
142411ca L |
1030 | { |
1031 | case R_X86_64_TLSGD: | |
1032 | case R_X86_64_TLSLD: | |
1033 | if ((rel + 1) >= relend) | |
0a1b45a2 | 1034 | return false; |
142411ca L |
1035 | |
1036 | if (r_type == R_X86_64_TLSGD) | |
1037 | { | |
52bc799a | 1038 | /* Check transition from GD access model. For 64bit, only |
142411ca | 1039 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
e2cbcd91 L |
1040 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1041 | or | |
1042 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
1043 | .byte 0x66; rex64 | |
1044 | call *__tls_get_addr@GOTPCREL(%rip) | |
1045 | which may be converted to | |
1046 | addr32 call __tls_get_addr | |
52bc799a L |
1047 | can transit to different access model. For 32bit, only |
1048 | leaq foo@tlsgd(%rip), %rdi | |
e2cbcd91 L |
1049 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1050 | or | |
1051 | leaq foo@tlsgd(%rip), %rdi | |
1052 | .byte 0x66; rex64 | |
1053 | call *__tls_get_addr@GOTPCREL(%rip) | |
1054 | which may be converted to | |
1055 | addr32 call __tls_get_addr | |
1056 | can transit to different access model. For largepic, | |
5c98a14e | 1057 | we also support: |
07d6d2b8 AM |
1058 | leaq foo@tlsgd(%rip), %rdi |
1059 | movabsq $__tls_get_addr@pltoff, %rax | |
1060 | addq $r15, %rax | |
1061 | call *%rax | |
e2cbcd91 | 1062 | or |
07d6d2b8 AM |
1063 | leaq foo@tlsgd(%rip), %rdi |
1064 | movabsq $__tls_get_addr@pltoff, %rax | |
1065 | addq $rbx, %rax | |
1066 | call *%rax */ | |
142411ca | 1067 | |
fa289a5f AM |
1068 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; |
1069 | ||
5c98a14e | 1070 | if ((offset + 12) > sec->size) |
0a1b45a2 | 1071 | return false; |
52bc799a | 1072 | |
e2cbcd91 L |
1073 | call = contents + offset + 4; |
1074 | if (call[0] != 0x66 | |
1075 | || !((call[1] == 0x48 | |
1076 | && call[2] == 0xff | |
1077 | && call[3] == 0x15) | |
1078 | || (call[1] == 0x48 | |
1079 | && call[2] == 0x67 | |
1080 | && call[3] == 0xe8) | |
1081 | || (call[1] == 0x66 | |
1082 | && call[2] == 0x48 | |
1083 | && call[3] == 0xe8))) | |
5c98a14e JJ |
1084 | { |
1085 | if (!ABI_64_P (abfd) | |
1086 | || (offset + 19) > sec->size | |
1087 | || offset < 3 | |
e2cbcd91 L |
1088 | || memcmp (call - 7, leaq + 1, 3) != 0 |
1089 | || memcmp (call, "\x48\xb8", 2) != 0 | |
1090 | || call[11] != 0x01 | |
1091 | || call[13] != 0xff | |
1092 | || call[14] != 0xd0 | |
1093 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1094 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
0a1b45a2 AM |
1095 | return false; |
1096 | largepic = true; | |
5c98a14e JJ |
1097 | } |
1098 | else if (ABI_64_P (abfd)) | |
52bc799a | 1099 | { |
52bc799a | 1100 | if (offset < 4 |
fa289a5f | 1101 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
0a1b45a2 | 1102 | return false; |
52bc799a L |
1103 | } |
1104 | else | |
1105 | { | |
52bc799a | 1106 | if (offset < 3 |
fa289a5f | 1107 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
0a1b45a2 | 1108 | return false; |
52bc799a | 1109 | } |
e2cbcd91 | 1110 | indirect_call = call[2] == 0xff; |
142411ca L |
1111 | } |
1112 | else | |
1113 | { | |
1114 | /* Check transition from LD access model. Only | |
1115 | leaq foo@tlsld(%rip), %rdi; | |
e2cbcd91 | 1116 | call __tls_get_addr@PLT |
07d6d2b8 | 1117 | or |
e2cbcd91 L |
1118 | leaq foo@tlsld(%rip), %rdi; |
1119 | call *__tls_get_addr@GOTPCREL(%rip) | |
1120 | which may be converted to | |
1121 | addr32 call __tls_get_addr | |
5c98a14e JJ |
1122 | can transit to different access model. For largepic |
1123 | we also support: | |
07d6d2b8 AM |
1124 | leaq foo@tlsld(%rip), %rdi |
1125 | movabsq $__tls_get_addr@pltoff, %rax | |
1126 | addq $r15, %rax | |
1127 | call *%rax | |
e2cbcd91 | 1128 | or |
07d6d2b8 AM |
1129 | leaq foo@tlsld(%rip), %rdi |
1130 | movabsq $__tls_get_addr@pltoff, %rax | |
1131 | addq $rbx, %rax | |
1132 | call *%rax */ | |
142411ca | 1133 | |
fa289a5f | 1134 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1135 | |
1136 | if (offset < 3 || (offset + 9) > sec->size) | |
0a1b45a2 | 1137 | return false; |
142411ca | 1138 | |
5c98a14e | 1139 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
0a1b45a2 | 1140 | return false; |
5c98a14e | 1141 | |
e2cbcd91 L |
1142 | call = contents + offset + 4; |
1143 | if (!(call[0] == 0xe8 | |
1144 | || (call[0] == 0xff && call[1] == 0x15) | |
1145 | || (call[0] == 0x67 && call[1] == 0xe8))) | |
5c98a14e JJ |
1146 | { |
1147 | if (!ABI_64_P (abfd) | |
1148 | || (offset + 19) > sec->size | |
e2cbcd91 L |
1149 | || memcmp (call, "\x48\xb8", 2) != 0 |
1150 | || call[11] != 0x01 | |
1151 | || call[13] != 0xff | |
1152 | || call[14] != 0xd0 | |
1153 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1154 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
0a1b45a2 AM |
1155 | return false; |
1156 | largepic = true; | |
5c98a14e | 1157 | } |
e2cbcd91 | 1158 | indirect_call = call[0] == 0xff; |
142411ca L |
1159 | } |
1160 | ||
351f65ca | 1161 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca | 1162 | if (r_symndx < symtab_hdr->sh_info) |
0a1b45a2 | 1163 | return false; |
142411ca L |
1164 | |
1165 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1d4af308 | 1166 | if (h == NULL |
0afcef53 | 1167 | || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr) |
0a1b45a2 | 1168 | return false; |
e2cbcd91 | 1169 | else |
78984959 L |
1170 | { |
1171 | r_type = (ELF32_R_TYPE (rel[1].r_info) | |
1172 | & ~R_X86_64_converted_reloc_bit); | |
1173 | if (largepic) | |
1174 | return r_type == R_X86_64_PLTOFF64; | |
1175 | else if (indirect_call) | |
1176 | return r_type == R_X86_64_GOTPCRELX; | |
1177 | else | |
1178 | return (r_type == R_X86_64_PC32 || r_type == R_X86_64_PLT32); | |
1179 | } | |
142411ca L |
1180 | |
1181 | case R_X86_64_GOTTPOFF: | |
1182 | /* Check transition from IE access model: | |
4a4c5f25 L |
1183 | mov foo@gottpoff(%rip), %reg |
1184 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1185 | */ |
1186 | ||
4a4c5f25 L |
1187 | /* Check REX prefix first. */ |
1188 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1189 | { | |
1190 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1191 | if (val != 0x48 && val != 0x4c) | |
1192 | { | |
1193 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1194 | if (ABI_64_P (abfd)) | |
0a1b45a2 | 1195 | return false; |
4a4c5f25 L |
1196 | } |
1197 | } | |
1198 | else | |
1199 | { | |
1200 | /* X32 may not have any REX prefix. */ | |
1201 | if (ABI_64_P (abfd)) | |
0a1b45a2 | 1202 | return false; |
4a4c5f25 | 1203 | if (offset < 2 || (offset + 3) > sec->size) |
0a1b45a2 | 1204 | return false; |
4a4c5f25 | 1205 | } |
142411ca L |
1206 | |
1207 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1208 | if (val != 0x8b && val != 0x03) | |
0a1b45a2 | 1209 | return false; |
142411ca L |
1210 | |
1211 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1212 | return (val & 0xc7) == 5; | |
1213 | ||
1214 | case R_X86_64_GOTPC32_TLSDESC: | |
1215 | /* Check transition from GDesc access model: | |
14470f07 L |
1216 | leaq x@tlsdesc(%rip), %rax <--- LP64 mode. |
1217 | rex leal x@tlsdesc(%rip), %eax <--- X32 mode. | |
142411ca L |
1218 | |
1219 | Make sure it's a leaq adding rip to a 32-bit offset | |
1220 | into any register, although it's probably almost always | |
1221 | going to be rax. */ | |
1222 | ||
1223 | if (offset < 3 || (offset + 4) > sec->size) | |
0a1b45a2 | 1224 | return false; |
142411ca L |
1225 | |
1226 | val = bfd_get_8 (abfd, contents + offset - 3); | |
14470f07 L |
1227 | val &= 0xfb; |
1228 | if (val != 0x48 && (ABI_64_P (abfd) || val != 0x40)) | |
0a1b45a2 | 1229 | return false; |
142411ca L |
1230 | |
1231 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
0a1b45a2 | 1232 | return false; |
142411ca L |
1233 | |
1234 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1235 | return (val & 0xc7) == 0x05; | |
1236 | ||
1237 | case R_X86_64_TLSDESC_CALL: | |
1238 | /* Check transition from GDesc access model: | |
14470f07 L |
1239 | call *x@tlsdesc(%rax) <--- LP64 mode. |
1240 | call *x@tlsdesc(%eax) <--- X32 mode. | |
142411ca L |
1241 | */ |
1242 | if (offset + 2 <= sec->size) | |
1243 | { | |
14470f07 | 1244 | unsigned int prefix; |
e2cbcd91 | 1245 | call = contents + offset; |
14470f07 L |
1246 | prefix = 0; |
1247 | if (!ABI_64_P (abfd)) | |
1248 | { | |
1249 | /* Check for call *x@tlsdesc(%eax). */ | |
1250 | if (call[0] == 0x67) | |
1251 | { | |
1252 | prefix = 1; | |
1253 | if (offset + 3 > sec->size) | |
0a1b45a2 | 1254 | return false; |
14470f07 L |
1255 | } |
1256 | } | |
1257 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
1258 | return call[prefix] == 0xff && call[1 + prefix] == 0x10; | |
142411ca L |
1259 | } |
1260 | ||
0a1b45a2 | 1261 | return false; |
142411ca L |
1262 | |
1263 | default: | |
1264 | abort (); | |
1265 | } | |
1266 | } | |
1267 | ||
1268 | /* Return TRUE if the TLS access transition is OK or no transition | |
1269 | will be performed. Update R_TYPE if there is a transition. */ | |
1270 | ||
0a1b45a2 | 1271 | static bool |
351f65ca L |
1272 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1273 | asection *sec, bfd_byte *contents, | |
1274 | Elf_Internal_Shdr *symtab_hdr, | |
1275 | struct elf_link_hash_entry **sym_hashes, | |
1276 | unsigned int *r_type, int tls_type, | |
1277 | const Elf_Internal_Rela *rel, | |
1278 | const Elf_Internal_Rela *relend, | |
1279 | struct elf_link_hash_entry *h, | |
bedfd056 | 1280 | unsigned long r_symndx, |
0a1b45a2 | 1281 | bool from_relocate_section) |
142411ca L |
1282 | { |
1283 | unsigned int from_type = *r_type; | |
1284 | unsigned int to_type = from_type; | |
0a1b45a2 | 1285 | bool check = true; |
142411ca | 1286 | |
bb1cb422 L |
1287 | /* Skip TLS transition for functions. */ |
1288 | if (h != NULL | |
1289 | && (h->type == STT_FUNC | |
1290 | || h->type == STT_GNU_IFUNC)) | |
0a1b45a2 | 1291 | return true; |
bb1cb422 | 1292 | |
142411ca | 1293 | switch (from_type) |
bffbf940 JJ |
1294 | { |
1295 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1296 | case R_X86_64_GOTPC32_TLSDESC: |
1297 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1298 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1299 | if (bfd_link_executable (info)) |
142411ca L |
1300 | { |
1301 | if (h == NULL) | |
1302 | to_type = R_X86_64_TPOFF32; | |
1303 | else | |
1304 | to_type = R_X86_64_GOTTPOFF; | |
1305 | } | |
1306 | ||
bedfd056 L |
1307 | /* When we are called from elf_x86_64_relocate_section, there may |
1308 | be additional transitions based on TLS_TYPE. */ | |
1309 | if (from_relocate_section) | |
142411ca L |
1310 | { |
1311 | unsigned int new_to_type = to_type; | |
1312 | ||
51537393 | 1313 | if (TLS_TRANSITION_IE_TO_LE_P (info, h, tls_type)) |
142411ca L |
1314 | new_to_type = R_X86_64_TPOFF32; |
1315 | ||
1316 | if (to_type == R_X86_64_TLSGD | |
1317 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1318 | || to_type == R_X86_64_TLSDESC_CALL) | |
1319 | { | |
1320 | if (tls_type == GOT_TLS_IE) | |
1321 | new_to_type = R_X86_64_GOTTPOFF; | |
1322 | } | |
1323 | ||
1324 | /* We checked the transition before when we were called from | |
351f65ca | 1325 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1326 | transition which hasn't been checked before. */ |
1327 | check = new_to_type != to_type && from_type == to_type; | |
1328 | to_type = new_to_type; | |
1329 | } | |
1330 | ||
1331 | break; | |
1332 | ||
bffbf940 | 1333 | case R_X86_64_TLSLD: |
0e1862bb | 1334 | if (bfd_link_executable (info)) |
142411ca L |
1335 | to_type = R_X86_64_TPOFF32; |
1336 | break; | |
1337 | ||
1338 | default: | |
0a1b45a2 | 1339 | return true; |
bffbf940 JJ |
1340 | } |
1341 | ||
142411ca L |
1342 | /* Return TRUE if there is no transition. */ |
1343 | if (from_type == to_type) | |
0a1b45a2 | 1344 | return true; |
142411ca L |
1345 | |
1346 | /* Check if the transition can be performed. */ | |
1347 | if (check | |
351f65ca L |
1348 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1349 | symtab_hdr, sym_hashes, | |
1350 | from_type, rel, relend)) | |
142411ca | 1351 | { |
2f629d23 | 1352 | reloc_howto_type *from, *to; |
4c544807 | 1353 | const char *name; |
142411ca | 1354 | |
351f65ca L |
1355 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1356 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1357 | |
f3185997 | 1358 | if (from == NULL || to == NULL) |
0a1b45a2 | 1359 | return false; |
f3185997 | 1360 | |
4c544807 L |
1361 | if (h) |
1362 | name = h->root.root.string; | |
1363 | else | |
1364 | { | |
0afcef53 | 1365 | struct elf_x86_link_hash_table *htab; |
4dfe6ac6 | 1366 | |
0afcef53 | 1367 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
1368 | if (htab == NULL) |
1369 | name = "*unknown*"; | |
1370 | else | |
1371 | { | |
1372 | Elf_Internal_Sym *isym; | |
1373 | ||
f1dfbfdb | 1374 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, |
4dfe6ac6 NC |
1375 | abfd, r_symndx); |
1376 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1377 | } | |
4c544807 L |
1378 | } |
1379 | ||
4eca0228 | 1380 | _bfd_error_handler |
695344c0 | 1381 | /* xgettext:c-format */ |
2dcf00ce AM |
1382 | (_("%pB: TLS transition from %s to %s against `%s' at %#" PRIx64 |
1383 | " in section `%pA' failed"), | |
1384 | abfd, from->name, to->name, name, (uint64_t) rel->r_offset, sec); | |
142411ca | 1385 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 1386 | return false; |
142411ca L |
1387 | } |
1388 | ||
1389 | *r_type = to_type; | |
0a1b45a2 | 1390 | return true; |
bffbf940 JJ |
1391 | } |
1392 | ||
c1d11331 L |
1393 | /* Rename some of the generic section flags to better document how they |
1394 | are used here. */ | |
6999821f | 1395 | #define check_relocs_failed sec_flg0 |
338c190a | 1396 | |
0a1b45a2 | 1397 | static bool |
aab921ad L |
1398 | elf_x86_64_need_pic (struct bfd_link_info *info, |
1399 | bfd *input_bfd, asection *sec, | |
338c190a L |
1400 | struct elf_link_hash_entry *h, |
1401 | Elf_Internal_Shdr *symtab_hdr, | |
1402 | Elf_Internal_Sym *isym, | |
1403 | reloc_howto_type *howto) | |
1404 | { | |
1405 | const char *v = ""; | |
1406 | const char *und = ""; | |
1407 | const char *pic = ""; | |
aab921ad | 1408 | const char *object; |
338c190a L |
1409 | |
1410 | const char *name; | |
1411 | if (h) | |
1412 | { | |
1413 | name = h->root.root.string; | |
1414 | switch (ELF_ST_VISIBILITY (h->other)) | |
1415 | { | |
1416 | case STV_HIDDEN: | |
1417 | v = _("hidden symbol "); | |
1418 | break; | |
1419 | case STV_INTERNAL: | |
1420 | v = _("internal symbol "); | |
1421 | break; | |
1422 | case STV_PROTECTED: | |
1423 | v = _("protected symbol "); | |
1424 | break; | |
1425 | default: | |
0afcef53 | 1426 | if (((struct elf_x86_link_hash_entry *) h)->def_protected) |
a5b4ee94 L |
1427 | v = _("protected symbol "); |
1428 | else | |
1429 | v = _("symbol "); | |
9a7f0679 | 1430 | pic = NULL; |
338c190a L |
1431 | break; |
1432 | } | |
1433 | ||
83924b38 | 1434 | if (!SYMBOL_DEFINED_NON_SHARED_P (h) && !h->def_dynamic) |
338c190a L |
1435 | und = _("undefined "); |
1436 | } | |
1437 | else | |
1438 | { | |
1439 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL); | |
9a7f0679 | 1440 | pic = NULL; |
338c190a L |
1441 | } |
1442 | ||
aab921ad | 1443 | if (bfd_link_dll (info)) |
9a7f0679 L |
1444 | { |
1445 | object = _("a shared object"); | |
1446 | if (!pic) | |
1447 | pic = _("; recompile with -fPIC"); | |
1448 | } | |
aab921ad | 1449 | else |
9a7f0679 L |
1450 | { |
1451 | if (bfd_link_pie (info)) | |
1452 | object = _("a PIE object"); | |
1453 | else | |
1454 | object = _("a PDE object"); | |
1455 | if (!pic) | |
1456 | pic = _("; recompile with -fPIE"); | |
1457 | } | |
aab921ad | 1458 | |
695344c0 | 1459 | /* xgettext:c-format */ |
871b3ab2 | 1460 | _bfd_error_handler (_("%pB: relocation %s against %s%s`%s' can " |
aab921ad L |
1461 | "not be used when making %s%s"), |
1462 | input_bfd, howto->name, und, v, name, | |
1463 | object, pic); | |
338c190a L |
1464 | bfd_set_error (bfd_error_bad_value); |
1465 | sec->check_relocs_failed = 1; | |
0a1b45a2 | 1466 | return false; |
338c190a | 1467 | } |
c1d11331 | 1468 | |
c175a657 L |
1469 | /* With the local symbol, foo, we convert |
1470 | mov foo@GOTPCREL(%rip), %reg | |
1471 | to | |
1472 | lea foo(%rip), %reg | |
1473 | and convert | |
1474 | call/jmp *foo@GOTPCREL(%rip) | |
1475 | to | |
1476 | nop call foo/jmp foo nop | |
1477 | When PIC is false, convert | |
1478 | test %reg, foo@GOTPCREL(%rip) | |
1479 | to | |
1480 | test $foo, %reg | |
1481 | and convert | |
1482 | binop foo@GOTPCREL(%rip), %reg | |
1483 | to | |
1484 | binop $foo, %reg | |
1485 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1486 | instructions. */ | |
1487 | ||
0a1b45a2 | 1488 | static bool |
8b43e456 | 1489 | elf_x86_64_convert_load_reloc (bfd *abfd, |
c175a657 | 1490 | bfd_byte *contents, |
6999821f | 1491 | unsigned int *r_type_p, |
c175a657 L |
1492 | Elf_Internal_Rela *irel, |
1493 | struct elf_link_hash_entry *h, | |
0a1b45a2 | 1494 | bool *converted, |
c175a657 L |
1495 | struct bfd_link_info *link_info) |
1496 | { | |
0afcef53 | 1497 | struct elf_x86_link_hash_table *htab; |
0a1b45a2 AM |
1498 | bool is_pic; |
1499 | bool no_overflow; | |
1500 | bool relocx; | |
1501 | bool to_reloc_pc32; | |
1502 | bool abs_symbol; | |
1503 | bool local_ref; | |
c175a657 | 1504 | asection *tsec; |
c175a657 L |
1505 | bfd_signed_vma raddend; |
1506 | unsigned int opcode; | |
1507 | unsigned int modrm; | |
6999821f | 1508 | unsigned int r_type = *r_type_p; |
c175a657 | 1509 | unsigned int r_symndx; |
c175a657 | 1510 | bfd_vma roff = irel->r_offset; |
382aae06 | 1511 | bfd_vma abs_relocation; |
c175a657 L |
1512 | |
1513 | if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2)) | |
0a1b45a2 | 1514 | return true; |
c175a657 L |
1515 | |
1516 | raddend = irel->r_addend; | |
1517 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
1518 | if (raddend != -4) | |
0a1b45a2 | 1519 | return true; |
c175a657 | 1520 | |
0afcef53 | 1521 | htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA); |
c175a657 L |
1522 | is_pic = bfd_link_pic (link_info); |
1523 | ||
1524 | relocx = (r_type == R_X86_64_GOTPCRELX | |
1525 | || r_type == R_X86_64_REX_GOTPCRELX); | |
1526 | ||
8b43e456 L |
1527 | /* TRUE if --no-relax is used. */ |
1528 | no_overflow = link_info->disable_target_specific_optimizations > 1; | |
c175a657 L |
1529 | |
1530 | r_symndx = htab->r_sym (irel->r_info); | |
1531 | ||
1532 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1533 | ||
1534 | /* Convert mov to lea since it has been done for a while. */ | |
1535 | if (opcode != 0x8b) | |
1536 | { | |
1537 | /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX | |
1538 | for call, jmp or one of adc, add, and, cmp, or, sbb, sub, | |
1539 | test, xor instructions. */ | |
1540 | if (!relocx) | |
0a1b45a2 | 1541 | return true; |
c175a657 L |
1542 | } |
1543 | ||
1544 | /* We convert only to R_X86_64_PC32: | |
1545 | 1. Branch. | |
1546 | 2. R_X86_64_GOTPCREL since we can't modify REX byte. | |
8b43e456 | 1547 | 3. no_overflow is true. |
c175a657 L |
1548 | 4. PIC. |
1549 | */ | |
1550 | to_reloc_pc32 = (opcode == 0xff | |
1551 | || !relocx | |
8b43e456 | 1552 | || no_overflow |
c175a657 L |
1553 | || is_pic); |
1554 | ||
0a1b45a2 | 1555 | abs_symbol = false; |
382aae06 L |
1556 | abs_relocation = 0; |
1557 | ||
c175a657 L |
1558 | /* Get the symbol referred to by the reloc. */ |
1559 | if (h == NULL) | |
1560 | { | |
1561 | Elf_Internal_Sym *isym | |
f1dfbfdb | 1562 | = bfd_sym_from_r_symndx (&htab->elf.sym_cache, abfd, r_symndx); |
c175a657 L |
1563 | |
1564 | /* Skip relocation against undefined symbols. */ | |
1565 | if (isym->st_shndx == SHN_UNDEF) | |
0a1b45a2 | 1566 | return true; |
c175a657 | 1567 | |
0a1b45a2 | 1568 | local_ref = true; |
c175a657 | 1569 | if (isym->st_shndx == SHN_ABS) |
382aae06 L |
1570 | { |
1571 | tsec = bfd_abs_section_ptr; | |
0a1b45a2 | 1572 | abs_symbol = true; |
382aae06 L |
1573 | abs_relocation = isym->st_value; |
1574 | } | |
c175a657 L |
1575 | else if (isym->st_shndx == SHN_COMMON) |
1576 | tsec = bfd_com_section_ptr; | |
1577 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
1578 | tsec = &_bfd_elf_large_com_section; | |
1579 | else | |
1580 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c175a657 L |
1581 | } |
1582 | else | |
1583 | { | |
1584 | /* Undefined weak symbol is only bound locally in executable | |
1585 | and its reference is resolved as 0 without relocation | |
1586 | overflow. We can only perform this optimization for | |
1587 | GOTPCRELX relocations since we need to modify REX byte. | |
1588 | It is OK convert mov with R_X86_64_GOTPCREL to | |
1589 | R_X86_64_PC32. */ | |
0a27fed7 L |
1590 | struct elf_x86_link_hash_entry *eh = elf_x86_hash_entry (h); |
1591 | ||
382aae06 L |
1592 | abs_symbol = ABS_SYMBOL_P (h); |
1593 | abs_relocation = h->root.u.def.value; | |
1594 | ||
0a27fed7 L |
1595 | /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */ |
1596 | local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h); | |
c175a657 | 1597 | if ((relocx || opcode == 0x8b) |
0a27fed7 L |
1598 | && (h->root.type == bfd_link_hash_undefweak |
1599 | && !eh->linker_def | |
1600 | && local_ref)) | |
c175a657 L |
1601 | { |
1602 | if (opcode == 0xff) | |
1603 | { | |
1604 | /* Skip for branch instructions since R_X86_64_PC32 | |
1605 | may overflow. */ | |
8b43e456 | 1606 | if (no_overflow) |
0a1b45a2 | 1607 | return true; |
c175a657 L |
1608 | } |
1609 | else if (relocx) | |
1610 | { | |
1611 | /* For non-branch instructions, we can convert to | |
1612 | R_X86_64_32/R_X86_64_32S since we know if there | |
1613 | is a REX byte. */ | |
0a1b45a2 | 1614 | to_reloc_pc32 = false; |
c175a657 L |
1615 | } |
1616 | ||
1617 | /* Since we don't know the current PC when PIC is true, | |
1618 | we can't convert to R_X86_64_PC32. */ | |
1619 | if (to_reloc_pc32 && is_pic) | |
0a1b45a2 | 1620 | return true; |
c175a657 L |
1621 | |
1622 | goto convert; | |
1623 | } | |
1624 | /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since | |
1625 | ld.so may use its link-time address. */ | |
cbd0eecf | 1626 | else if (h->start_stop |
0a27fed7 | 1627 | || eh->linker_def |
cbd0eecf L |
1628 | || ((h->def_regular |
1629 | || h->root.type == bfd_link_hash_defined | |
1630 | || h->root.type == bfd_link_hash_defweak) | |
1631 | && h != htab->elf.hdynamic | |
0a27fed7 | 1632 | && local_ref)) |
c175a657 L |
1633 | { |
1634 | /* bfd_link_hash_new or bfd_link_hash_undefined is | |
1635 | set by an assignment in a linker script in | |
cbd0eecf L |
1636 | bfd_elf_record_link_assignment. start_stop is set |
1637 | on __start_SECNAME/__stop_SECNAME which mark section | |
1638 | SECNAME. */ | |
1639 | if (h->start_stop | |
0a27fed7 | 1640 | || eh->linker_def |
cbd0eecf L |
1641 | || (h->def_regular |
1642 | && (h->root.type == bfd_link_hash_new | |
1643 | || h->root.type == bfd_link_hash_undefined | |
1644 | || ((h->root.type == bfd_link_hash_defined | |
1645 | || h->root.type == bfd_link_hash_defweak) | |
1646 | && h->root.u.def.section == bfd_und_section_ptr)))) | |
c175a657 L |
1647 | { |
1648 | /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */ | |
8b43e456 | 1649 | if (no_overflow) |
0a1b45a2 | 1650 | return true; |
c175a657 L |
1651 | goto convert; |
1652 | } | |
1653 | tsec = h->root.u.def.section; | |
c175a657 L |
1654 | } |
1655 | else | |
0a1b45a2 | 1656 | return true; |
c175a657 L |
1657 | } |
1658 | ||
2168b268 L |
1659 | /* Don't convert GOTPCREL relocation against large section. */ |
1660 | if (elf_section_data (tsec) != NULL | |
1661 | && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0) | |
0a1b45a2 | 1662 | return true; |
2168b268 | 1663 | |
8b43e456 L |
1664 | /* Skip since R_X86_64_PC32/R_X86_64_32/R_X86_64_32S may overflow. */ |
1665 | if (no_overflow) | |
0a1b45a2 | 1666 | return true; |
c175a657 | 1667 | |
dc1e8a47 | 1668 | convert: |
c175a657 L |
1669 | if (opcode == 0xff) |
1670 | { | |
1671 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
1672 | unsigned int nop; | |
1673 | unsigned int disp; | |
1674 | bfd_vma nop_offset; | |
1675 | ||
1676 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
1677 | R_X86_64_PC32. */ | |
1678 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1679 | if (modrm == 0x25) | |
1680 | { | |
1681 | /* Convert to "jmp foo nop". */ | |
1682 | modrm = 0xe9; | |
1683 | nop = NOP_OPCODE; | |
1684 | nop_offset = irel->r_offset + 3; | |
1685 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1686 | irel->r_offset -= 1; | |
1687 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1688 | } | |
1689 | else | |
1690 | { | |
0afcef53 L |
1691 | struct elf_x86_link_hash_entry *eh |
1692 | = (struct elf_x86_link_hash_entry *) h; | |
e2cbcd91 | 1693 | |
c175a657 L |
1694 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
1695 | is a nop prefix. */ | |
1696 | modrm = 0xe8; | |
e2cbcd91 L |
1697 | /* To support TLS optimization, always use addr32 prefix for |
1698 | "call *__tls_get_addr@GOTPCREL(%rip)". */ | |
1d4af308 | 1699 | if (eh && eh->tls_get_addr) |
c175a657 | 1700 | { |
e2cbcd91 L |
1701 | nop = 0x67; |
1702 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1703 | } |
1704 | else | |
e2cbcd91 | 1705 | { |
5b9c07b2 L |
1706 | nop = htab->params->call_nop_byte; |
1707 | if (htab->params->call_nop_as_suffix) | |
e2cbcd91 L |
1708 | { |
1709 | nop_offset = irel->r_offset + 3; | |
1710 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1711 | irel->r_offset -= 1; | |
1712 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1713 | } | |
1714 | else | |
1715 | nop_offset = irel->r_offset - 2; | |
1716 | } | |
c175a657 L |
1717 | } |
1718 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1719 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1720 | r_type = R_X86_64_PC32; | |
1721 | } | |
1722 | else | |
1723 | { | |
1724 | unsigned int rex; | |
1725 | unsigned int rex_mask = REX_R; | |
1726 | ||
1727 | if (r_type == R_X86_64_REX_GOTPCRELX) | |
1728 | rex = bfd_get_8 (abfd, contents + roff - 3); | |
1729 | else | |
1730 | rex = 0; | |
1731 | ||
1732 | if (opcode == 0x8b) | |
1733 | { | |
7e45e7a9 | 1734 | if (abs_symbol && local_ref && relocx) |
0a1b45a2 | 1735 | to_reloc_pc32 = false; |
382aae06 | 1736 | |
c175a657 L |
1737 | if (to_reloc_pc32) |
1738 | { | |
1739 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1740 | "lea foo(%rip), %reg". */ | |
1741 | opcode = 0x8d; | |
1742 | r_type = R_X86_64_PC32; | |
1743 | } | |
1744 | else | |
1745 | { | |
1746 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1747 | "mov $foo, %reg". */ | |
1748 | opcode = 0xc7; | |
1749 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1750 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1751 | if ((rex & REX_W) != 0 | |
1752 | && ABI_64_P (link_info->output_bfd)) | |
1753 | { | |
1754 | /* Keep the REX_W bit in REX byte for LP64. */ | |
1755 | r_type = R_X86_64_32S; | |
1756 | goto rewrite_modrm_rex; | |
1757 | } | |
1758 | else | |
1759 | { | |
1760 | /* If the REX_W bit in REX byte isn't needed, | |
1761 | use R_X86_64_32 and clear the W bit to avoid | |
1762 | sign-extend imm32 to imm64. */ | |
1763 | r_type = R_X86_64_32; | |
1764 | /* Clear the W bit in REX byte. */ | |
1765 | rex_mask |= REX_W; | |
1766 | goto rewrite_modrm_rex; | |
1767 | } | |
1768 | } | |
1769 | } | |
1770 | else | |
1771 | { | |
1772 | /* R_X86_64_PC32 isn't supported. */ | |
1773 | if (to_reloc_pc32) | |
0a1b45a2 | 1774 | return true; |
c175a657 L |
1775 | |
1776 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1777 | if (opcode == 0x85) | |
1778 | { | |
1779 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
1780 | "test $foo, %reg". */ | |
1781 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1782 | opcode = 0xf7; | |
1783 | } | |
1784 | else | |
1785 | { | |
1786 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
1787 | "binop $foo, %reg". */ | |
1788 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
1789 | opcode = 0x81; | |
1790 | } | |
1791 | ||
1792 | /* Use R_X86_64_32 with 32-bit operand to avoid relocation | |
1793 | overflow when sign-extending imm32 to imm64. */ | |
1794 | r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32; | |
1795 | ||
dc1e8a47 | 1796 | rewrite_modrm_rex: |
382aae06 L |
1797 | if (abs_relocation) |
1798 | { | |
1799 | /* Check if R_X86_64_32S/R_X86_64_32 fits. */ | |
1800 | if (r_type == R_X86_64_32S) | |
1801 | { | |
1802 | if ((abs_relocation + 0x80000000) > 0xffffffff) | |
0a1b45a2 | 1803 | return true; |
382aae06 L |
1804 | } |
1805 | else | |
1806 | { | |
1807 | if (abs_relocation > 0xffffffff) | |
0a1b45a2 | 1808 | return true; |
382aae06 L |
1809 | } |
1810 | } | |
1811 | ||
c175a657 L |
1812 | bfd_put_8 (abfd, modrm, contents + roff - 1); |
1813 | ||
1814 | if (rex) | |
1815 | { | |
1816 | /* Move the R bit to the B bit in REX byte. */ | |
1817 | rex = (rex & ~rex_mask) | (rex & REX_R) >> 2; | |
1818 | bfd_put_8 (abfd, rex, contents + roff - 3); | |
1819 | } | |
1820 | ||
1821 | /* No addend for R_X86_64_32/R_X86_64_32S relocations. */ | |
1822 | irel->r_addend = 0; | |
1823 | } | |
1824 | ||
1825 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1826 | } | |
1827 | ||
6999821f | 1828 | *r_type_p = r_type; |
78984959 L |
1829 | irel->r_info = htab->r_info (r_symndx, |
1830 | r_type | R_X86_64_converted_reloc_bit); | |
c175a657 | 1831 | |
0a1b45a2 | 1832 | *converted = true; |
c175a657 | 1833 | |
0a1b45a2 | 1834 | return true; |
c175a657 L |
1835 | } |
1836 | ||
70256ad8 | 1837 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1838 | calculate needed space in the global offset table, procedure |
1839 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1840 | |
0a1b45a2 | 1841 | static bool |
351f65ca L |
1842 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1843 | asection *sec, | |
1844 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1845 | { |
0afcef53 | 1846 | struct elf_x86_link_hash_table *htab; |
70256ad8 AJ |
1847 | Elf_Internal_Shdr *symtab_hdr; |
1848 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1849 | const Elf_Internal_Rela *rel; |
1850 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 1851 | asection *sreloc; |
bedfd056 | 1852 | bfd_byte *contents; |
0a1b45a2 | 1853 | bool converted; |
70256ad8 | 1854 | |
0e1862bb | 1855 | if (bfd_link_relocatable (info)) |
0a1b45a2 | 1856 | return true; |
70256ad8 | 1857 | |
0afcef53 | 1858 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 | 1859 | if (htab == NULL) |
afd9acee L |
1860 | { |
1861 | sec->check_relocs_failed = 1; | |
0a1b45a2 | 1862 | return false; |
afd9acee | 1863 | } |
4dfe6ac6 | 1864 | |
fe53b4a4 L |
1865 | BFD_ASSERT (is_x86_elf (abfd, htab)); |
1866 | ||
bedfd056 L |
1867 | /* Get the section contents. */ |
1868 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1869 | contents = elf_section_data (sec)->this_hdr.contents; | |
1870 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1871 | { | |
1872 | sec->check_relocs_failed = 1; | |
0a1b45a2 | 1873 | return false; |
bedfd056 L |
1874 | } |
1875 | ||
0ffa91dd | 1876 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1877 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1878 | |
0a1b45a2 | 1879 | converted = false; |
5e5e02ae | 1880 | |
c434dee6 | 1881 | sreloc = NULL; |
cbe950e9 | 1882 | |
70256ad8 AJ |
1883 | rel_end = relocs + sec->reloc_count; |
1884 | for (rel = relocs; rel < rel_end; rel++) | |
1885 | { | |
bffbf940 | 1886 | unsigned int r_type; |
d42c267e | 1887 | unsigned int r_symndx; |
70256ad8 | 1888 | struct elf_link_hash_entry *h; |
0afcef53 | 1889 | struct elf_x86_link_hash_entry *eh; |
4c544807 L |
1890 | Elf_Internal_Sym *isym; |
1891 | const char *name; | |
0a1b45a2 AM |
1892 | bool size_reloc; |
1893 | bool converted_reloc; | |
1894 | bool no_dynreloc; | |
70256ad8 | 1895 | |
351f65ca L |
1896 | r_symndx = htab->r_sym (rel->r_info); |
1897 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1898 | |
1899 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1900 | { | |
695344c0 | 1901 | /* xgettext:c-format */ |
871b3ab2 | 1902 | _bfd_error_handler (_("%pB: bad symbol index: %d"), |
4eca0228 | 1903 | abfd, r_symndx); |
afd9acee | 1904 | goto error_return; |
c434dee6 AJ |
1905 | } |
1906 | ||
70256ad8 | 1907 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1908 | { |
1909 | /* A local symbol. */ | |
f1dfbfdb | 1910 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, |
c2e61a4e L |
1911 | abfd, r_symndx); |
1912 | if (isym == NULL) | |
afd9acee | 1913 | goto error_return; |
c25bc9fc L |
1914 | |
1915 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1916 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1917 | { |
0afcef53 | 1918 | h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, |
0a1b45a2 | 1919 | true); |
c25bc9fc | 1920 | if (h == NULL) |
afd9acee | 1921 | goto error_return; |
6bbec505 | 1922 | |
c25bc9fc | 1923 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
1924 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
1925 | isym, NULL); | |
c25bc9fc L |
1926 | h->type = STT_GNU_IFUNC; |
1927 | h->def_regular = 1; | |
1928 | h->ref_regular = 1; | |
1929 | h->forced_local = 1; | |
1930 | h->root.type = bfd_link_hash_defined; | |
1931 | } | |
1932 | else | |
1933 | h = NULL; | |
1934 | } | |
70256ad8 | 1935 | else |
71cb9464 | 1936 | { |
4c544807 | 1937 | isym = NULL; |
71cb9464 L |
1938 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1939 | while (h->root.type == bfd_link_hash_indirect | |
1940 | || h->root.type == bfd_link_hash_warning) | |
1941 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1942 | } |
cbe950e9 | 1943 | |
d1534d16 L |
1944 | /* Check invalid x32 relocations. */ |
1945 | if (!ABI_64_P (abfd)) | |
1946 | switch (r_type) | |
1947 | { | |
1948 | default: | |
1949 | break; | |
1950 | ||
d1534d16 L |
1951 | case R_X86_64_DTPOFF64: |
1952 | case R_X86_64_TPOFF64: | |
1953 | case R_X86_64_PC64: | |
1954 | case R_X86_64_GOTOFF64: | |
1955 | case R_X86_64_GOT64: | |
1956 | case R_X86_64_GOTPCREL64: | |
1957 | case R_X86_64_GOTPC64: | |
1958 | case R_X86_64_GOTPLT64: | |
1959 | case R_X86_64_PLTOFF64: | |
1960 | { | |
1961 | if (h) | |
1962 | name = h->root.root.string; | |
1963 | else | |
1964 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1965 | NULL); | |
4eca0228 | 1966 | _bfd_error_handler |
695344c0 | 1967 | /* xgettext:c-format */ |
871b3ab2 | 1968 | (_("%pB: relocation %s against symbol `%s' isn't " |
d1534d16 L |
1969 | "supported in x32 mode"), abfd, |
1970 | x86_64_elf_howto_table[r_type].name, name); | |
1971 | bfd_set_error (bfd_error_bad_value); | |
afd9acee | 1972 | goto error_return; |
d1534d16 L |
1973 | } |
1974 | break; | |
1975 | } | |
1976 | ||
c25bc9fc L |
1977 | if (h != NULL) |
1978 | { | |
ad1e85de L |
1979 | /* It is referenced by a non-shared object. */ |
1980 | h->ref_regular = 1; | |
71cb9464 | 1981 | } |
70256ad8 | 1982 | |
0a1b45a2 | 1983 | converted_reloc = false; |
6999821f L |
1984 | if ((r_type == R_X86_64_GOTPCREL |
1985 | || r_type == R_X86_64_GOTPCRELX | |
1986 | || r_type == R_X86_64_REX_GOTPCRELX) | |
1987 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
1988 | { | |
1989 | Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel; | |
1990 | if (!elf_x86_64_convert_load_reloc (abfd, contents, &r_type, | |
1991 | irel, h, &converted_reloc, | |
1992 | info)) | |
1993 | goto error_return; | |
5e5e02ae L |
1994 | |
1995 | if (converted_reloc) | |
0a1b45a2 | 1996 | converted = true; |
6999821f L |
1997 | } |
1998 | ||
382aae06 L |
1999 | if (!_bfd_elf_x86_valid_reloc_p (sec, info, htab, rel, h, isym, |
2000 | symtab_hdr, &no_dynreloc)) | |
0a1b45a2 | 2001 | return false; |
382aae06 | 2002 | |
bedfd056 | 2003 | if (! elf_x86_64_tls_transition (info, abfd, sec, contents, |
351f65ca L |
2004 | symtab_hdr, sym_hashes, |
2005 | &r_type, GOT_UNKNOWN, | |
0a1b45a2 | 2006 | rel, rel_end, h, r_symndx, false)) |
afd9acee | 2007 | goto error_return; |
142411ca | 2008 | |
cd048363 L |
2009 | /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */ |
2010 | if (h == htab->elf.hgot) | |
0a1b45a2 | 2011 | htab->got_referenced = true; |
cd048363 | 2012 | |
0afcef53 | 2013 | eh = (struct elf_x86_link_hash_entry *) h; |
bffbf940 | 2014 | switch (r_type) |
70256ad8 | 2015 | { |
bffbf940 | 2016 | case R_X86_64_TLSLD: |
0f09b4d8 | 2017 | htab->tls_ld_or_ldm_got.refcount = 1; |
bffbf940 JJ |
2018 | goto create_got; |
2019 | ||
2020 | case R_X86_64_TPOFF32: | |
0e1862bb | 2021 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
aab921ad | 2022 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2023 | &x86_64_elf_howto_table[r_type]); |
aec6b87e | 2024 | if (eh != NULL) |
98b273dc | 2025 | eh->zero_undefweak &= 0x2; |
bffbf940 | 2026 | break; |
c434dee6 | 2027 | |
bffbf940 | 2028 | case R_X86_64_GOTTPOFF: |
0e1862bb | 2029 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
2030 | info->flags |= DF_STATIC_TLS; |
2031 | /* Fall through */ | |
70256ad8 | 2032 | |
bffbf940 JJ |
2033 | case R_X86_64_GOT32: |
2034 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
2035 | case R_X86_64_GOTPCRELX: |
2036 | case R_X86_64_REX_GOTPCRELX: | |
bffbf940 | 2037 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
2038 | case R_X86_64_GOT64: |
2039 | case R_X86_64_GOTPCREL64: | |
2040 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
2041 | case R_X86_64_GOTPC32_TLSDESC: |
2042 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
2043 | /* This symbol requires a global offset table entry. */ |
2044 | { | |
2045 | int tls_type, old_tls_type; | |
2046 | ||
2047 | switch (r_type) | |
2048 | { | |
382aae06 L |
2049 | default: |
2050 | tls_type = GOT_NORMAL; | |
2051 | if (h) | |
2052 | { | |
2053 | if (ABS_SYMBOL_P (h)) | |
2054 | tls_type = GOT_ABS; | |
2055 | } | |
2056 | else if (isym->st_shndx == SHN_ABS) | |
2057 | tls_type = GOT_ABS; | |
2058 | break; | |
2059 | case R_X86_64_TLSGD: | |
2060 | tls_type = GOT_TLS_GD; | |
2061 | break; | |
2062 | case R_X86_64_GOTTPOFF: | |
2063 | tls_type = GOT_TLS_IE; | |
2064 | break; | |
67a4f2b7 AO |
2065 | case R_X86_64_GOTPC32_TLSDESC: |
2066 | case R_X86_64_TLSDESC_CALL: | |
382aae06 L |
2067 | tls_type = GOT_TLS_GDESC; |
2068 | break; | |
bffbf940 JJ |
2069 | } |
2070 | ||
2071 | if (h != NULL) | |
2072 | { | |
0f09b4d8 | 2073 | h->got.refcount = 1; |
aec6b87e | 2074 | old_tls_type = eh->tls_type; |
bffbf940 JJ |
2075 | } |
2076 | else | |
2077 | { | |
2078 | bfd_signed_vma *local_got_refcounts; | |
2079 | ||
2080 | /* This is a global offset table entry for a local symbol. */ | |
2081 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2082 | if (local_got_refcounts == NULL) | |
2083 | { | |
2084 | bfd_size_type size; | |
2085 | ||
2086 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
2087 | size *= sizeof (bfd_signed_vma) |
2088 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
2089 | local_got_refcounts = ((bfd_signed_vma *) |
2090 | bfd_zalloc (abfd, size)); | |
2091 | if (local_got_refcounts == NULL) | |
afd9acee | 2092 | goto error_return; |
bffbf940 | 2093 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
0afcef53 | 2094 | elf_x86_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 2095 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
0afcef53 | 2096 | elf_x86_local_got_tls_type (abfd) |
67a4f2b7 | 2097 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 | 2098 | } |
0f09b4d8 | 2099 | local_got_refcounts[r_symndx] = 1; |
bffbf940 | 2100 | old_tls_type |
0afcef53 | 2101 | = elf_x86_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
2102 | } |
2103 | ||
2104 | /* If a TLS symbol is accessed using IE at least once, | |
2105 | there is no point to use dynamic model for it. */ | |
2106 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
2107 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
2108 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 2109 | { |
67a4f2b7 | 2110 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 2111 | tls_type = old_tls_type; |
67a4f2b7 AO |
2112 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2113 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2114 | tls_type |= old_tls_type; | |
bffbf940 JJ |
2115 | else |
2116 | { | |
09a24cbf | 2117 | if (h) |
4c544807 L |
2118 | name = h->root.root.string; |
2119 | else | |
2120 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
2121 | isym, NULL); | |
4eca0228 | 2122 | _bfd_error_handler |
695344c0 | 2123 | /* xgettext:c-format */ |
871b3ab2 | 2124 | (_("%pB: '%s' accessed both as normal and" |
63a5468a | 2125 | " thread local symbol"), |
4c544807 | 2126 | abfd, name); |
68c4a57e | 2127 | bfd_set_error (bfd_error_bad_value); |
afd9acee | 2128 | goto error_return; |
bffbf940 JJ |
2129 | } |
2130 | } | |
2131 | ||
2132 | if (old_tls_type != tls_type) | |
2133 | { | |
aec6b87e L |
2134 | if (eh != NULL) |
2135 | eh->tls_type = tls_type; | |
bffbf940 | 2136 | else |
0afcef53 | 2137 | elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
2138 | } |
2139 | } | |
c434dee6 AJ |
2140 | /* Fall through */ |
2141 | ||
d6ab8113 JB |
2142 | case R_X86_64_GOTOFF64: |
2143 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2144 | case R_X86_64_GOTPC64: |
bffbf940 | 2145 | create_got: |
aec6b87e | 2146 | if (eh != NULL) |
98b273dc | 2147 | eh->zero_undefweak &= 0x2; |
70256ad8 AJ |
2148 | break; |
2149 | ||
2150 | case R_X86_64_PLT32: | |
c3320543 | 2151 | case R_X86_64_PLT32_BND: |
70256ad8 | 2152 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
2153 | actually build the entry in adjust_dynamic_symbol, |
2154 | because this might be a case of linking PIC code which is | |
2155 | never referenced by a dynamic object, in which case we | |
2156 | don't need to generate a procedure linkage table entry | |
2157 | after all. */ | |
70256ad8 AJ |
2158 | |
2159 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 2160 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
2161 | if (h == NULL) |
2162 | continue; | |
2163 | ||
98b273dc | 2164 | eh->zero_undefweak &= 0x2; |
f5385ebf | 2165 | h->needs_plt = 1; |
79b0c981 | 2166 | h->plt.refcount = 1; |
70256ad8 AJ |
2167 | break; |
2168 | ||
7b81dfbb AJ |
2169 | case R_X86_64_PLTOFF64: |
2170 | /* This tries to form the 'address' of a function relative | |
2171 | to GOT. For global symbols we need a PLT entry. */ | |
2172 | if (h != NULL) | |
2173 | { | |
2174 | h->needs_plt = 1; | |
79b0c981 | 2175 | h->plt.refcount = 1; |
7b81dfbb AJ |
2176 | } |
2177 | goto create_got; | |
2178 | ||
6a3e1bae L |
2179 | case R_X86_64_SIZE32: |
2180 | case R_X86_64_SIZE64: | |
0a1b45a2 | 2181 | size_reloc = true; |
6a3e1bae L |
2182 | goto do_size; |
2183 | ||
248775ba L |
2184 | case R_X86_64_32: |
2185 | if (!ABI_64_P (abfd)) | |
2186 | goto pointer; | |
1a0670f3 | 2187 | /* Fall through. */ |
cc78d0af AJ |
2188 | case R_X86_64_8: |
2189 | case R_X86_64_16: | |
70256ad8 | 2190 | case R_X86_64_32S: |
338c190a L |
2191 | /* Check relocation overflow as these relocs may lead to |
2192 | run-time relocation overflow. Don't error out for | |
1b71fb54 | 2193 | sections we don't care about, such as debug sections or |
338c190a | 2194 | when relocation overflow check is disabled. */ |
5b9c07b2 | 2195 | if (!htab->params->no_reloc_overflow_check |
6999821f | 2196 | && !converted_reloc |
338c190a L |
2197 | && (bfd_link_pic (info) |
2198 | || (bfd_link_executable (info) | |
2199 | && h != NULL | |
2200 | && !h->def_regular | |
2201 | && h->def_dynamic | |
081b1afe | 2202 | && (sec->flags & SEC_READONLY) == 0))) |
aab921ad | 2203 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2204 | &x86_64_elf_howto_table[r_type]); |
1b71fb54 AJ |
2205 | /* Fall through. */ |
2206 | ||
81e8046d L |
2207 | case R_X86_64_PC8: |
2208 | case R_X86_64_PC16: | |
2209 | case R_X86_64_PC32: | |
2210 | case R_X86_64_PC32_BND: | |
d6ab8113 | 2211 | case R_X86_64_PC64: |
1b71fb54 | 2212 | case R_X86_64_64: |
dc1e8a47 | 2213 | pointer: |
aec6b87e | 2214 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
98b273dc | 2215 | eh->zero_undefweak |= 0x2; |
bf52d7c7 L |
2216 | /* We are called after all symbols have been resolved. Only |
2217 | relocation against STT_GNU_IFUNC symbol must go through | |
2218 | PLT. */ | |
d1ed1c7d L |
2219 | if (h != NULL |
2220 | && (bfd_link_executable (info) | |
bf52d7c7 | 2221 | || h->type == STT_GNU_IFUNC)) |
c434dee6 | 2222 | { |
0a1b45a2 | 2223 | bool func_pointer_ref = false; |
233cc9c1 | 2224 | |
5db4f0d3 L |
2225 | if (r_type == R_X86_64_PC32) |
2226 | { | |
2227 | /* Since something like ".long foo - ." may be used | |
2228 | as pointer, make sure that PLT is used if foo is | |
2229 | a function defined in a shared library. */ | |
2230 | if ((sec->flags & SEC_CODE) == 0) | |
451875b4 L |
2231 | { |
2232 | h->pointer_equality_needed = 1; | |
2233 | if (bfd_link_pie (info) | |
2234 | && h->type == STT_FUNC | |
2235 | && !h->def_regular | |
2236 | && h->def_dynamic) | |
2237 | { | |
2238 | h->needs_plt = 1; | |
2239 | h->plt.refcount = 1; | |
2240 | } | |
2241 | } | |
5db4f0d3 L |
2242 | } |
2243 | else if (r_type != R_X86_64_PC32_BND | |
2244 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
2245 | { |
2246 | h->pointer_equality_needed = 1; | |
2247 | /* At run-time, R_X86_64_64 can be resolved for both | |
2248 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
2249 | can only be resolved for x32. */ | |
2250 | if ((sec->flags & SEC_READONLY) == 0 | |
2251 | && (r_type == R_X86_64_64 | |
2252 | || (!ABI_64_P (abfd) | |
2253 | && (r_type == R_X86_64_32 | |
2254 | || r_type == R_X86_64_32S)))) | |
0a1b45a2 | 2255 | func_pointer_ref = true; |
79b0c981 L |
2256 | } |
2257 | ||
2258 | if (!func_pointer_ref) | |
2259 | { | |
2260 | /* If this reloc is in a read-only section, we might | |
2261 | need a copy reloc. We can't check reliably at this | |
2262 | stage whether the section is read-only, as input | |
2263 | sections have not yet been mapped to output sections. | |
2264 | Tentatively set the flag for now, and correct in | |
2265 | adjust_dynamic_symbol. */ | |
2266 | h->non_got_ref = 1; | |
2267 | ||
2268 | /* We may need a .plt entry if the symbol is a function | |
2269 | defined in a shared lib or is a function referenced | |
2270 | from the code or read-only section. */ | |
2271 | if (!h->def_regular | |
2272 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
2273 | h->plt.refcount = 1; | |
04ebc307 | 2274 | } |
c434dee6 | 2275 | } |
70256ad8 | 2276 | |
0a1b45a2 | 2277 | size_reloc = false; |
dc1e8a47 | 2278 | do_size: |
382aae06 | 2279 | if (!no_dynreloc |
0a1b45a2 | 2280 | && NEED_DYNAMIC_RELOCATION_P (info, true, h, sec, r_type, |
382aae06 | 2281 | htab->pointer_r_type)) |
70256ad8 | 2282 | { |
e03a8ed8 L |
2283 | struct elf_dyn_relocs *p; |
2284 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2285 | |
2286 | /* We must copy these reloc types into the output file. | |
2287 | Create a reloc section in dynobj and make room for | |
2288 | this reloc. */ | |
70256ad8 AJ |
2289 | if (sreloc == NULL) |
2290 | { | |
83bac4b0 | 2291 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 | 2292 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
0a1b45a2 | 2293 | abfd, /*rela?*/ true); |
70256ad8 | 2294 | |
70256ad8 | 2295 | if (sreloc == NULL) |
afd9acee | 2296 | goto error_return; |
70256ad8 AJ |
2297 | } |
2298 | ||
c434dee6 AJ |
2299 | /* If this is a global symbol, we count the number of |
2300 | relocations we need for this symbol. */ | |
2301 | if (h != NULL) | |
190eb1dd | 2302 | head = &h->dyn_relocs; |
c434dee6 AJ |
2303 | else |
2304 | { | |
2305 | /* Track dynamic relocs needed for local syms too. | |
2306 | We really need local syms available to do this | |
2307 | easily. Oh well. */ | |
c434dee6 | 2308 | asection *s; |
87d72d41 | 2309 | void **vpp; |
87d72d41 | 2310 | |
f1dfbfdb | 2311 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, |
87d72d41 AM |
2312 | abfd, r_symndx); |
2313 | if (isym == NULL) | |
afd9acee | 2314 | goto error_return; |
87d72d41 AM |
2315 | |
2316 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2317 | if (s == NULL) |
87d72d41 | 2318 | s = sec; |
70256ad8 | 2319 | |
e81d3500 DD |
2320 | /* Beware of type punned pointers vs strict aliasing |
2321 | rules. */ | |
2322 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2323 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2324 | } |
70256ad8 | 2325 | |
c434dee6 AJ |
2326 | p = *head; |
2327 | if (p == NULL || p->sec != sec) | |
2328 | { | |
986f0783 | 2329 | size_t amt = sizeof *p; |
d8045f23 | 2330 | |
e03a8ed8 | 2331 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2332 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2333 | if (p == NULL) |
afd9acee | 2334 | goto error_return; |
c434dee6 AJ |
2335 | p->next = *head; |
2336 | *head = p; | |
2337 | p->sec = sec; | |
2338 | p->count = 0; | |
2339 | p->pc_count = 0; | |
70256ad8 | 2340 | } |
c434dee6 AJ |
2341 | |
2342 | p->count += 1; | |
06a6a421 | 2343 | /* Count size relocation as PC-relative relocation. */ |
daf1c414 | 2344 | if (X86_PCREL_TYPE_P (r_type) || size_reloc) |
c434dee6 | 2345 | p->pc_count += 1; |
70256ad8 AJ |
2346 | } |
2347 | break; | |
fe4770f4 AJ |
2348 | |
2349 | /* This relocation describes the C++ object vtable hierarchy. | |
2350 | Reconstruct it for later use during GC. */ | |
2351 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2352 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
afd9acee | 2353 | goto error_return; |
fe4770f4 AJ |
2354 | break; |
2355 | ||
2356 | /* This relocation describes which C++ vtable entries are actually | |
2357 | used. Record for later use during GC. */ | |
2358 | case R_X86_64_GNU_VTENTRY: | |
a0ea3a14 | 2359 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
afd9acee | 2360 | goto error_return; |
fe4770f4 | 2361 | break; |
c434dee6 AJ |
2362 | |
2363 | default: | |
2364 | break; | |
70256ad8 AJ |
2365 | } |
2366 | } | |
2367 | ||
bedfd056 L |
2368 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2369 | { | |
5e5e02ae | 2370 | if (!converted && !info->keep_memory) |
bedfd056 L |
2371 | free (contents); |
2372 | else | |
2373 | { | |
5e5e02ae L |
2374 | /* Cache the section contents for elf_link_input_bfd if any |
2375 | load is converted or --no-keep-memory isn't used. */ | |
bedfd056 L |
2376 | elf_section_data (sec)->this_hdr.contents = contents; |
2377 | } | |
2378 | } | |
2379 | ||
5e5e02ae L |
2380 | /* Cache relocations if any load is converted. */ |
2381 | if (elf_section_data (sec)->relocs != relocs && converted) | |
2382 | elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs; | |
2383 | ||
0a1b45a2 | 2384 | return true; |
afd9acee | 2385 | |
dc1e8a47 | 2386 | error_return: |
bedfd056 L |
2387 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2388 | free (contents); | |
afd9acee | 2389 | sec->check_relocs_failed = 1; |
0a1b45a2 | 2390 | return false; |
70256ad8 AJ |
2391 | } |
2392 | ||
bffbf940 JJ |
2393 | /* Return the relocation value for @tpoff relocation |
2394 | if STT_TLS virtual address is ADDRESS. */ | |
2395 | ||
2396 | static bfd_vma | |
351f65ca | 2397 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 2398 | { |
e1918d23 | 2399 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
2400 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
2401 | bfd_vma static_tls_size; | |
bffbf940 JJ |
2402 | |
2403 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 2404 | if (htab->tls_sec == NULL) |
bffbf940 | 2405 | return 0; |
7dc98aea RO |
2406 | |
2407 | /* Consider special static TLS alignment requirements. */ | |
2408 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
2409 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
2410 | } |
2411 | ||
8d88c4ca NC |
2412 | /* Relocate an x86_64 ELF section. */ |
2413 | ||
0f684201 | 2414 | static int |
351f65ca L |
2415 | elf_x86_64_relocate_section (bfd *output_bfd, |
2416 | struct bfd_link_info *info, | |
2417 | bfd *input_bfd, | |
2418 | asection *input_section, | |
2419 | bfd_byte *contents, | |
2420 | Elf_Internal_Rela *relocs, | |
2421 | Elf_Internal_Sym *local_syms, | |
2422 | asection **local_sections) | |
8d88c4ca | 2423 | { |
0afcef53 | 2424 | struct elf_x86_link_hash_table *htab; |
8d88c4ca NC |
2425 | Elf_Internal_Shdr *symtab_hdr; |
2426 | struct elf_link_hash_entry **sym_hashes; | |
2427 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2428 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 2429 | Elf_Internal_Rela *rel; |
60f2e42e | 2430 | Elf_Internal_Rela *wrel; |
8d88c4ca | 2431 | Elf_Internal_Rela *relend; |
38b12349 | 2432 | unsigned int plt_entry_size; |
0a1b45a2 | 2433 | bool status; |
8d88c4ca | 2434 | |
338c190a L |
2435 | /* Skip if check_relocs failed. */ |
2436 | if (input_section->check_relocs_failed) | |
0a1b45a2 | 2437 | return false; |
338c190a | 2438 | |
0afcef53 | 2439 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 | 2440 | if (htab == NULL) |
0a1b45a2 | 2441 | return false; |
fe53b4a4 | 2442 | |
7af5d5c4 AM |
2443 | if (!is_x86_elf (input_bfd, htab)) |
2444 | { | |
2445 | bfd_set_error (bfd_error_wrong_format); | |
0a1b45a2 | 2446 | return false; |
7af5d5c4 | 2447 | } |
fe53b4a4 | 2448 | |
765e526c | 2449 | plt_entry_size = htab->plt.plt_entry_size; |
0ffa91dd | 2450 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
2451 | sym_hashes = elf_sym_hashes (input_bfd); |
2452 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
0afcef53 | 2453 | local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 2454 | |
0afcef53 | 2455 | _bfd_x86_elf_set_tls_module_base (info); |
9f03412a | 2456 | |
0a1b45a2 | 2457 | status = true; |
60f2e42e | 2458 | rel = wrel = relocs; |
8d88c4ca | 2459 | relend = relocs + input_section->reloc_count; |
60f2e42e | 2460 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 2461 | { |
419414ea | 2462 | unsigned int r_type, r_type_tls; |
8d88c4ca NC |
2463 | reloc_howto_type *howto; |
2464 | unsigned long r_symndx; | |
2465 | struct elf_link_hash_entry *h; | |
0afcef53 | 2466 | struct elf_x86_link_hash_entry *eh; |
8d88c4ca NC |
2467 | Elf_Internal_Sym *sym; |
2468 | asection *sec; | |
0ff2b86e | 2469 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 2470 | bfd_vma relocation; |
0a1b45a2 | 2471 | bool unresolved_reloc; |
8d88c4ca | 2472 | bfd_reloc_status_type r; |
bffbf940 | 2473 | int tls_type; |
0ff2b86e | 2474 | asection *base_got, *resolved_plt; |
1788fc08 | 2475 | bfd_vma st_size; |
0a1b45a2 AM |
2476 | bool resolved_to_zero; |
2477 | bool relative_reloc; | |
2478 | bool converted_reloc; | |
2479 | bool need_copy_reloc_in_pie; | |
2480 | bool no_copyreloc_p; | |
8d88c4ca | 2481 | |
351f65ca | 2482 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
2483 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
2484 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
2485 | { |
2486 | if (wrel != rel) | |
2487 | *wrel = *rel; | |
2488 | continue; | |
2489 | } | |
8d88c4ca | 2490 | |
b638b5d5 | 2491 | r_symndx = htab->r_sym (rel->r_info); |
78984959 | 2492 | converted_reloc = (r_type & R_X86_64_converted_reloc_bit) != 0; |
b638b5d5 L |
2493 | if (converted_reloc) |
2494 | { | |
2495 | r_type &= ~R_X86_64_converted_reloc_bit; | |
2496 | rel->r_info = htab->r_info (r_symndx, r_type); | |
2497 | } | |
78984959 | 2498 | |
76268e02 L |
2499 | howto = elf_x86_64_rtype_to_howto (input_bfd, r_type); |
2500 | if (howto == NULL) | |
47aeb64c | 2501 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
8d88c4ca | 2502 | |
8d88c4ca NC |
2503 | h = NULL; |
2504 | sym = NULL; | |
2505 | sec = NULL; | |
0a1b45a2 | 2506 | unresolved_reloc = false; |
8d88c4ca | 2507 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
2508 | { |
2509 | sym = local_syms + r_symndx; | |
2510 | sec = local_sections[r_symndx]; | |
c434dee6 | 2511 | |
c25bc9fc L |
2512 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
2513 | &sec, rel); | |
1788fc08 | 2514 | st_size = sym->st_size; |
c25bc9fc L |
2515 | |
2516 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 2517 | if (!bfd_link_relocatable (info) |
351f65ca | 2518 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 2519 | { |
0afcef53 | 2520 | h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, |
0a1b45a2 | 2521 | rel, false); |
c25bc9fc L |
2522 | if (h == NULL) |
2523 | abort (); | |
2524 | ||
eed180f8 | 2525 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
2526 | h->root.u.def.value = sym->st_value; |
2527 | h->root.u.def.section = sec; | |
2528 | } | |
8da6118f | 2529 | } |
8d88c4ca | 2530 | else |
8da6118f | 2531 | { |
0a1b45a2 AM |
2532 | bool warned ATTRIBUTE_UNUSED; |
2533 | bool ignored ATTRIBUTE_UNUSED; | |
c434dee6 | 2534 | |
b2a8e766 AM |
2535 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2536 | r_symndx, symtab_hdr, sym_hashes, | |
2537 | h, sec, relocation, | |
62d887d4 | 2538 | unresolved_reloc, warned, ignored); |
1788fc08 | 2539 | st_size = h->size; |
8da6118f | 2540 | } |
ab96bf03 | 2541 | |
dbaa2011 | 2542 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
2543 | { |
2544 | _bfd_clear_contents (howto, input_bfd, input_section, | |
0930cb30 | 2545 | contents, rel->r_offset); |
60f2e42e L |
2546 | wrel->r_offset = rel->r_offset; |
2547 | wrel->r_info = 0; | |
2548 | wrel->r_addend = 0; | |
2549 | ||
2550 | /* For ld -r, remove relocations in debug sections against | |
2551 | sections defined in discarded sections. Not done for | |
2552 | eh_frame editing code expects to be present. */ | |
2553 | if (bfd_link_relocatable (info) | |
2554 | && (input_section->flags & SEC_DEBUGGING)) | |
2555 | wrel--; | |
2556 | ||
2557 | continue; | |
2558 | } | |
ab96bf03 | 2559 | |
0e1862bb | 2560 | if (bfd_link_relocatable (info)) |
2d5da473 L |
2561 | { |
2562 | if (wrel != rel) | |
2563 | *wrel = *rel; | |
2564 | continue; | |
2565 | } | |
ab96bf03 | 2566 | |
1788fc08 | 2567 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 2568 | { |
1788fc08 L |
2569 | if (r_type == R_X86_64_64) |
2570 | { | |
2571 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
2572 | zero-extend it to 64bit if addend is zero. */ | |
2573 | r_type = R_X86_64_32; | |
2574 | memset (contents + rel->r_offset + 4, 0, 4); | |
2575 | } | |
2576 | else if (r_type == R_X86_64_SIZE64) | |
2577 | { | |
2578 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
2579 | zero-extend it to 64bit if addend is zero. */ | |
2580 | r_type = R_X86_64_SIZE32; | |
2581 | memset (contents + rel->r_offset + 4, 0, 4); | |
2582 | } | |
64d25c44 L |
2583 | } |
2584 | ||
0afcef53 | 2585 | eh = (struct elf_x86_link_hash_entry *) h; |
0ff2b86e | 2586 | |
cbe950e9 L |
2587 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
2588 | it here if it is defined in a non-shared object. */ | |
2589 | if (h != NULL | |
2590 | && h->type == STT_GNU_IFUNC | |
2591 | && h->def_regular) | |
2592 | { | |
cbe950e9 | 2593 | bfd_vma plt_index; |
4c544807 | 2594 | const char *name; |
cbe950e9 | 2595 | |
97dc35c8 L |
2596 | if ((input_section->flags & SEC_ALLOC) == 0) |
2597 | { | |
347a8774 L |
2598 | /* If this is a SHT_NOTE section without SHF_ALLOC, treat |
2599 | STT_GNU_IFUNC symbol as STT_FUNC. */ | |
2600 | if (elf_section_type (input_section) == SHT_NOTE) | |
2601 | goto skip_ifunc; | |
97dc35c8 L |
2602 | /* Dynamic relocs are not propagated for SEC_DEBUGGING |
2603 | sections because such sections are not SEC_ALLOC and | |
2604 | thus ld.so will not process them. */ | |
2605 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 2606 | continue; |
97dc35c8 L |
2607 | abort (); |
2608 | } | |
233cc9c1 L |
2609 | |
2610 | switch (r_type) | |
2611 | { | |
2612 | default: | |
2613 | break; | |
2614 | ||
2615 | case R_X86_64_GOTPCREL: | |
2616 | case R_X86_64_GOTPCRELX: | |
2617 | case R_X86_64_REX_GOTPCRELX: | |
2618 | case R_X86_64_GOTPCREL64: | |
2619 | base_got = htab->elf.sgot; | |
2620 | off = h->got.offset; | |
2621 | ||
2622 | if (base_got == NULL) | |
2623 | abort (); | |
2624 | ||
2625 | if (off == (bfd_vma) -1) | |
2626 | { | |
2627 | /* We can't use h->got.offset here to save state, or | |
2628 | even just remember the offset, as finish_dynamic_symbol | |
2629 | would use that as offset into .got. */ | |
2630 | ||
2631 | if (h->plt.offset == (bfd_vma) -1) | |
2632 | abort (); | |
2633 | ||
2634 | if (htab->elf.splt != NULL) | |
2635 | { | |
38b12349 | 2636 | plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2637 | - htab->plt.has_plt0); |
233cc9c1 L |
2638 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
2639 | base_got = htab->elf.sgotplt; | |
2640 | } | |
2641 | else | |
2642 | { | |
2643 | plt_index = h->plt.offset / plt_entry_size; | |
2644 | off = plt_index * GOT_ENTRY_SIZE; | |
2645 | base_got = htab->elf.igotplt; | |
2646 | } | |
2647 | ||
2648 | if (h->dynindx == -1 | |
2649 | || h->forced_local | |
2650 | || info->symbolic) | |
2651 | { | |
2652 | /* This references the local defitionion. We must | |
2653 | initialize this entry in the global offset table. | |
2654 | Since the offset must always be a multiple of 8, | |
2655 | we use the least significant bit to record | |
2656 | whether we have initialized it already. | |
2657 | ||
2658 | When doing a dynamic link, we create a .rela.got | |
2659 | relocation entry to initialize the value. This | |
2660 | is done in the finish_dynamic_symbol routine. */ | |
2661 | if ((off & 1) != 0) | |
2662 | off &= ~1; | |
2663 | else | |
2664 | { | |
2665 | bfd_put_64 (output_bfd, relocation, | |
2666 | base_got->contents + off); | |
2667 | /* Note that this is harmless for the GOTPLT64 | |
2668 | case, as -1 | 1 still is -1. */ | |
2669 | h->got.offset |= 1; | |
2670 | } | |
2671 | } | |
2672 | } | |
2673 | ||
2674 | relocation = (base_got->output_section->vma | |
2675 | + base_got->output_offset + off); | |
2676 | ||
2677 | goto do_relocation; | |
2678 | } | |
2679 | ||
2680 | if (h->plt.offset == (bfd_vma) -1) | |
2681 | { | |
2682 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
2683 | if (r_type == htab->pointer_r_type | |
2684 | && (input_section->flags & SEC_CODE) == 0) | |
2685 | goto do_ifunc_pointer; | |
2686 | goto bad_ifunc_reloc; | |
2687 | } | |
cbe950e9 L |
2688 | |
2689 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
2690 | if (htab->elf.splt != NULL) |
2691 | { | |
f2c29a16 | 2692 | if (htab->plt_second != NULL) |
0ff2b86e | 2693 | { |
f2c29a16 L |
2694 | resolved_plt = htab->plt_second; |
2695 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
2696 | } |
2697 | else | |
2698 | { | |
2699 | resolved_plt = htab->elf.splt; | |
2700 | plt_offset = h->plt.offset; | |
2701 | } | |
2702 | } | |
2703 | else | |
2704 | { | |
2705 | resolved_plt = htab->elf.iplt; | |
2706 | plt_offset = h->plt.offset; | |
2707 | } | |
2708 | ||
2709 | relocation = (resolved_plt->output_section->vma | |
2710 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
2711 | |
2712 | switch (r_type) | |
2713 | { | |
2714 | default: | |
dc1e8a47 | 2715 | bad_ifunc_reloc: |
4c544807 L |
2716 | if (h->root.root.string) |
2717 | name = h->root.root.string; | |
2718 | else | |
2719 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
2720 | NULL); | |
4eca0228 | 2721 | _bfd_error_handler |
695344c0 | 2722 | /* xgettext:c-format */ |
871b3ab2 | 2723 | (_("%pB: relocation %s against STT_GNU_IFUNC " |
233cc9c1 L |
2724 | "symbol `%s' isn't supported"), input_bfd, |
2725 | howto->name, name); | |
cbe950e9 | 2726 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 2727 | return false; |
cbe950e9 L |
2728 | |
2729 | case R_X86_64_32S: | |
0e1862bb | 2730 | if (bfd_link_pic (info)) |
cbe950e9 | 2731 | abort (); |
710ab287 L |
2732 | goto do_relocation; |
2733 | ||
248775ba L |
2734 | case R_X86_64_32: |
2735 | if (ABI_64_P (output_bfd)) | |
2736 | goto do_relocation; | |
17672001 | 2737 | /* FALLTHROUGH */ |
eed180f8 | 2738 | case R_X86_64_64: |
dc1e8a47 | 2739 | do_ifunc_pointer: |
710ab287 L |
2740 | if (rel->r_addend != 0) |
2741 | { | |
4c544807 L |
2742 | if (h->root.root.string) |
2743 | name = h->root.root.string; | |
2744 | else | |
2745 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
2746 | sym, NULL); | |
4eca0228 | 2747 | _bfd_error_handler |
695344c0 | 2748 | /* xgettext:c-format */ |
871b3ab2 | 2749 | (_("%pB: relocation %s against STT_GNU_IFUNC " |
2dcf00ce AM |
2750 | "symbol `%s' has non-zero addend: %" PRId64), |
2751 | input_bfd, howto->name, name, (int64_t) rel->r_addend); | |
710ab287 | 2752 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 2753 | return false; |
710ab287 L |
2754 | } |
2755 | ||
2756 | /* Generate dynamic relcoation only when there is a | |
233cc9c1 L |
2757 | non-GOT reference in a shared object or there is no |
2758 | PLT. */ | |
2759 | if ((bfd_link_pic (info) && h->non_got_ref) | |
2760 | || h->plt.offset == (bfd_vma) -1) | |
710ab287 L |
2761 | { |
2762 | Elf_Internal_Rela outrel; | |
710ab287 L |
2763 | asection *sreloc; |
2764 | ||
c25bc9fc L |
2765 | /* Need a dynamic relocation to get the real function |
2766 | address. */ | |
710ab287 L |
2767 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
2768 | info, | |
2769 | input_section, | |
2770 | rel->r_offset); | |
2771 | if (outrel.r_offset == (bfd_vma) -1 | |
2772 | || outrel.r_offset == (bfd_vma) -2) | |
2773 | abort (); | |
2774 | ||
2775 | outrel.r_offset += (input_section->output_section->vma | |
2776 | + input_section->output_offset); | |
2777 | ||
cf1070f1 | 2778 | if (POINTER_LOCAL_IFUNC_P (info, h)) |
710ab287 | 2779 | { |
871b3ab2 | 2780 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
2781 | h->root.root.string, |
2782 | h->root.u.def.section->owner); | |
2783 | ||
710ab287 | 2784 | /* This symbol is resolved locally. */ |
56b8aada L |
2785 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
2786 | outrel.r_addend = (h->root.u.def.value | |
2787 | + h->root.u.def.section->output_section->vma | |
2788 | + h->root.u.def.section->output_offset); | |
68b00778 L |
2789 | |
2790 | if (htab->params->report_relative_reloc) | |
2791 | _bfd_x86_elf_link_report_relative_reloc | |
2792 | (info, input_section, h, sym, | |
2793 | "R_X86_64_IRELATIVE", &outrel); | |
710ab287 L |
2794 | } |
2795 | else | |
2796 | { | |
351f65ca | 2797 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
2798 | outrel.r_addend = 0; |
2799 | } | |
2800 | ||
233cc9c1 L |
2801 | /* Dynamic relocations are stored in |
2802 | 1. .rela.ifunc section in PIC object. | |
2803 | 2. .rela.got section in dynamic executable. | |
2804 | 3. .rela.iplt section in static executable. */ | |
2805 | if (bfd_link_pic (info)) | |
2806 | sreloc = htab->elf.irelifunc; | |
2807 | else if (htab->elf.splt != NULL) | |
2808 | sreloc = htab->elf.srelgot; | |
2809 | else | |
2810 | sreloc = htab->elf.irelplt; | |
351f65ca | 2811 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
2812 | |
2813 | /* If this reloc is against an external symbol, we | |
2814 | do not want to fiddle with the addend. Otherwise, | |
2815 | we need to include the symbol value so that it | |
2816 | becomes an addend for the dynamic reloc. For an | |
2817 | internal symbol, we have updated addend. */ | |
56b8aada | 2818 | continue; |
710ab287 | 2819 | } |
17672001 | 2820 | /* FALLTHROUGH */ |
cbe950e9 | 2821 | case R_X86_64_PC32: |
c3320543 | 2822 | case R_X86_64_PC32_BND: |
cbe950e9 L |
2823 | case R_X86_64_PC64: |
2824 | case R_X86_64_PLT32: | |
c3320543 | 2825 | case R_X86_64_PLT32_BND: |
cbe950e9 | 2826 | goto do_relocation; |
cbe950e9 L |
2827 | } |
2828 | } | |
2829 | ||
dc1e8a47 | 2830 | skip_ifunc: |
aec6b87e | 2831 | resolved_to_zero = (eh != NULL |
c5bce5c6 | 2832 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh)); |
aec6b87e | 2833 | |
70256ad8 AJ |
2834 | /* When generating a shared object, the relocations handled here are |
2835 | copied into the output file to be resolved at run time. */ | |
2836 | switch (r_type) | |
2837 | { | |
2838 | case R_X86_64_GOT32: | |
7b81dfbb | 2839 | case R_X86_64_GOT64: |
70256ad8 AJ |
2840 | /* Relocation is to the entry for this symbol in the global |
2841 | offset table. */ | |
70256ad8 | 2842 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
2843 | case R_X86_64_GOTPCRELX: |
2844 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
2845 | case R_X86_64_GOTPCREL64: |
2846 | /* Use global offset table entry as symbol value. */ | |
2847 | case R_X86_64_GOTPLT64: | |
de194d85 | 2848 | /* This is obsolete and treated the same as GOT64. */ |
6de2ae4a | 2849 | base_got = htab->elf.sgot; |
7b81dfbb | 2850 | |
6de2ae4a | 2851 | if (htab->elf.sgot == NULL) |
c434dee6 | 2852 | abort (); |
053579d7 | 2853 | |
0a1b45a2 | 2854 | relative_reloc = false; |
51e0a107 | 2855 | if (h != NULL) |
70256ad8 | 2856 | { |
c434dee6 | 2857 | off = h->got.offset; |
7b81dfbb | 2858 | if (h->needs_plt |
eed180f8 | 2859 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
2860 | && off == (bfd_vma)-1) |
2861 | { | |
2862 | /* We can't use h->got.offset here to save | |
2863 | state, or even just remember the offset, as | |
2864 | finish_dynamic_symbol would use that as offset into | |
2865 | .got. */ | |
38b12349 | 2866 | bfd_vma plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2867 | - htab->plt.has_plt0); |
7b81dfbb | 2868 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 2869 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
2870 | } |
2871 | ||
2eba97c2 | 2872 | if (RESOLVED_LOCALLY_P (info, h, htab)) |
51e0a107 | 2873 | { |
2eba97c2 L |
2874 | /* We must initialize this entry in the global offset |
2875 | table. Since the offset must always be a multiple | |
2876 | of 8, we use the least significant bit to record | |
2877 | whether we have initialized it already. | |
51e0a107 JH |
2878 | |
2879 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
2880 | relocation entry to initialize the value. This is |
2881 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
2882 | if ((off & 1) != 0) |
2883 | off &= ~1; | |
2884 | else | |
2885 | { | |
2886 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
2887 | base_got->contents + off); |
2888 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 2889 | as -1 | 1 still is -1. */ |
51e0a107 | 2890 | h->got.offset |= 1; |
9e9821dd | 2891 | |
f70656b2 | 2892 | if (GENERATE_RELATIVE_RELOC_P (info, h)) |
9e9821dd L |
2893 | { |
2894 | /* If this symbol isn't dynamic in PIC, | |
2895 | generate R_X86_64_RELATIVE here. */ | |
2896 | eh->no_finish_dynamic_symbol = 1; | |
0a1b45a2 | 2897 | relative_reloc = true; |
9e9821dd | 2898 | } |
51e0a107 JH |
2899 | } |
2900 | } | |
053579d7 | 2901 | else |
0a1b45a2 | 2902 | unresolved_reloc = false; |
70256ad8 | 2903 | } |
51e0a107 JH |
2904 | else |
2905 | { | |
c434dee6 AJ |
2906 | if (local_got_offsets == NULL) |
2907 | abort (); | |
51e0a107 JH |
2908 | |
2909 | off = local_got_offsets[r_symndx]; | |
2910 | ||
2911 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
2912 | the least significant bit to record whether we have |
2913 | already generated the necessary reloc. */ | |
51e0a107 JH |
2914 | if ((off & 1) != 0) |
2915 | off &= ~1; | |
2916 | else | |
2917 | { | |
c434dee6 | 2918 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 2919 | base_got->contents + off); |
9e9821dd | 2920 | local_got_offsets[r_symndx] |= 1; |
51e0a107 | 2921 | |
382aae06 L |
2922 | /* NB: GOTPCREL relocations against local absolute |
2923 | symbol store relocation value in the GOT slot | |
2924 | without relative relocation. */ | |
2925 | if (bfd_link_pic (info) | |
2926 | && !(sym->st_shndx == SHN_ABS | |
2927 | && (r_type == R_X86_64_GOTPCREL | |
2928 | || r_type == R_X86_64_GOTPCRELX | |
2929 | || r_type == R_X86_64_REX_GOTPCRELX))) | |
0a1b45a2 | 2930 | relative_reloc = true; |
51e0a107 | 2931 | } |
51e0a107 | 2932 | } |
6a2bda3f | 2933 | |
9e9821dd L |
2934 | if (relative_reloc) |
2935 | { | |
2936 | asection *s; | |
2937 | Elf_Internal_Rela outrel; | |
2938 | ||
2939 | /* We need to generate a R_X86_64_RELATIVE reloc | |
2940 | for the dynamic linker. */ | |
2941 | s = htab->elf.srelgot; | |
2942 | if (s == NULL) | |
2943 | abort (); | |
2944 | ||
2945 | outrel.r_offset = (base_got->output_section->vma | |
2946 | + base_got->output_offset | |
2947 | + off); | |
2948 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); | |
2949 | outrel.r_addend = relocation; | |
68b00778 L |
2950 | |
2951 | if (htab->params->report_relative_reloc) | |
2952 | _bfd_x86_elf_link_report_relative_reloc | |
2953 | (info, input_section, h, sym, "R_X86_64_RELATIVE", | |
2954 | &outrel); | |
2955 | ||
9e9821dd L |
2956 | elf_append_rela (output_bfd, s, &outrel); |
2957 | } | |
2958 | ||
c434dee6 AJ |
2959 | if (off >= (bfd_vma) -2) |
2960 | abort (); | |
2961 | ||
7b81dfbb AJ |
2962 | relocation = base_got->output_section->vma |
2963 | + base_got->output_offset + off; | |
56ceb5b5 L |
2964 | if (r_type != R_X86_64_GOTPCREL |
2965 | && r_type != R_X86_64_GOTPCRELX | |
2966 | && r_type != R_X86_64_REX_GOTPCRELX | |
2967 | && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
2968 | relocation -= htab->elf.sgotplt->output_section->vma |
2969 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 2970 | |
70256ad8 AJ |
2971 | break; |
2972 | ||
d6ab8113 JB |
2973 | case R_X86_64_GOTOFF64: |
2974 | /* Relocation is relative to the start of the global offset | |
2975 | table. */ | |
2976 | ||
3d949995 L |
2977 | /* Check to make sure it isn't a protected function or data |
2978 | symbol for shared library since it may not be local when | |
e3c0e327 L |
2979 | used as function address or with copy relocation. We also |
2980 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 2981 | if (bfd_link_pic (info) && h) |
d6ab8113 | 2982 | { |
e3c0e327 L |
2983 | if (!h->def_regular) |
2984 | { | |
2985 | const char *v; | |
2986 | ||
2987 | switch (ELF_ST_VISIBILITY (h->other)) | |
2988 | { | |
2989 | case STV_HIDDEN: | |
2990 | v = _("hidden symbol"); | |
2991 | break; | |
2992 | case STV_INTERNAL: | |
2993 | v = _("internal symbol"); | |
2994 | break; | |
2995 | case STV_PROTECTED: | |
2996 | v = _("protected symbol"); | |
2997 | break; | |
2998 | default: | |
2999 | v = _("symbol"); | |
3000 | break; | |
3001 | } | |
3002 | ||
4eca0228 | 3003 | _bfd_error_handler |
695344c0 | 3004 | /* xgettext:c-format */ |
871b3ab2 | 3005 | (_("%pB: relocation R_X86_64_GOTOFF64 against undefined %s" |
63a5468a | 3006 | " `%s' can not be used when making a shared object"), |
e3c0e327 L |
3007 | input_bfd, v, h->root.root.string); |
3008 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 3009 | return false; |
e3c0e327 | 3010 | } |
0e1862bb | 3011 | else if (!bfd_link_executable (info) |
6999821f | 3012 | && !SYMBOL_REFERENCES_LOCAL_P (info, h) |
e3c0e327 L |
3013 | && (h->type == STT_FUNC |
3014 | || h->type == STT_OBJECT) | |
3015 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
3016 | { | |
4eca0228 | 3017 | _bfd_error_handler |
da0d12d2 | 3018 | /* xgettext:c-format */ |
871b3ab2 | 3019 | (_("%pB: relocation R_X86_64_GOTOFF64 against protected %s" |
63a5468a | 3020 | " `%s' can not be used when making a shared object"), |
e3c0e327 L |
3021 | input_bfd, |
3022 | h->type == STT_FUNC ? "function" : "data", | |
3023 | h->root.root.string); | |
3024 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 3025 | return false; |
e3c0e327 | 3026 | } |
d6ab8113 JB |
3027 | } |
3028 | ||
3029 | /* Note that sgot is not involved in this | |
3030 | calculation. We always want the start of .got.plt. If we | |
3031 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
3032 | permitted by the ABI, we might have to change this | |
3033 | calculation. */ | |
6de2ae4a L |
3034 | relocation -= htab->elf.sgotplt->output_section->vma |
3035 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3036 | break; |
3037 | ||
3038 | case R_X86_64_GOTPC32: | |
7b81dfbb | 3039 | case R_X86_64_GOTPC64: |
d6ab8113 | 3040 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
3041 | relocation = htab->elf.sgotplt->output_section->vma |
3042 | + htab->elf.sgotplt->output_offset; | |
0a1b45a2 | 3043 | unresolved_reloc = false; |
d6ab8113 | 3044 | break; |
7b81dfbb AJ |
3045 | |
3046 | case R_X86_64_PLTOFF64: | |
3047 | /* Relocation is PLT entry relative to GOT. For local | |
3048 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 3049 | if (h != NULL |
7b81dfbb | 3050 | /* See PLT32 handling. */ |
9d734efa L |
3051 | && (h->plt.offset != (bfd_vma) -1 |
3052 | || eh->plt_got.offset != (bfd_vma) -1) | |
6de2ae4a | 3053 | && htab->elf.splt != NULL) |
7b81dfbb | 3054 | { |
9d734efa L |
3055 | if (eh->plt_got.offset != (bfd_vma) -1) |
3056 | { | |
3057 | /* Use the GOT PLT. */ | |
3058 | resolved_plt = htab->plt_got; | |
3059 | plt_offset = eh->plt_got.offset; | |
3060 | } | |
f2c29a16 | 3061 | else if (htab->plt_second != NULL) |
0ff2b86e | 3062 | { |
f2c29a16 L |
3063 | resolved_plt = htab->plt_second; |
3064 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
3065 | } |
3066 | else | |
3067 | { | |
3068 | resolved_plt = htab->elf.splt; | |
3069 | plt_offset = h->plt.offset; | |
3070 | } | |
3071 | ||
3072 | relocation = (resolved_plt->output_section->vma | |
3073 | + resolved_plt->output_offset | |
3074 | + plt_offset); | |
0a1b45a2 | 3075 | unresolved_reloc = false; |
7b81dfbb AJ |
3076 | } |
3077 | ||
6de2ae4a L |
3078 | relocation -= htab->elf.sgotplt->output_section->vma |
3079 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 3080 | break; |
d6ab8113 | 3081 | |
70256ad8 | 3082 | case R_X86_64_PLT32: |
c3320543 | 3083 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
3084 | /* Relocation is to the entry for this symbol in the |
3085 | procedure linkage table. */ | |
3086 | ||
3087 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 3088 | without using the procedure linkage table. */ |
70256ad8 AJ |
3089 | if (h == NULL) |
3090 | break; | |
3091 | ||
dd7e64d4 L |
3092 | if ((h->plt.offset == (bfd_vma) -1 |
3093 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 3094 | || htab->elf.splt == NULL) |
70256ad8 AJ |
3095 | { |
3096 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
3097 | happens when statically linking PIC code, or when |
3098 | using -Bsymbolic. */ | |
70256ad8 AJ |
3099 | break; |
3100 | } | |
3101 | ||
dc1e8a47 | 3102 | use_plt: |
dd7e64d4 | 3103 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 3104 | { |
f2c29a16 | 3105 | if (htab->plt_second != NULL) |
dd7e64d4 | 3106 | { |
f2c29a16 L |
3107 | resolved_plt = htab->plt_second; |
3108 | plt_offset = eh->plt_second.offset; | |
dd7e64d4 L |
3109 | } |
3110 | else | |
3111 | { | |
3112 | resolved_plt = htab->elf.splt; | |
3113 | plt_offset = h->plt.offset; | |
3114 | } | |
0ff2b86e L |
3115 | } |
3116 | else | |
3117 | { | |
dd7e64d4 L |
3118 | /* Use the GOT PLT. */ |
3119 | resolved_plt = htab->plt_got; | |
3120 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
3121 | } |
3122 | ||
3123 | relocation = (resolved_plt->output_section->vma | |
3124 | + resolved_plt->output_offset | |
3125 | + plt_offset); | |
0a1b45a2 | 3126 | unresolved_reloc = false; |
70256ad8 AJ |
3127 | break; |
3128 | ||
1788fc08 L |
3129 | case R_X86_64_SIZE32: |
3130 | case R_X86_64_SIZE64: | |
1788fc08 L |
3131 | /* Set to symbol size. */ |
3132 | relocation = st_size; | |
3133 | goto direct; | |
3134 | ||
fd8ab9e5 AJ |
3135 | case R_X86_64_PC8: |
3136 | case R_X86_64_PC16: | |
3137 | case R_X86_64_PC32: | |
c3320543 | 3138 | case R_X86_64_PC32_BND: |
81e8046d L |
3139 | /* Don't complain about -fPIC if the symbol is undefined when |
3140 | building executable unless it is unresolved weak symbol, | |
3141 | references a dynamic definition in PIE or -z nocopyreloc | |
3142 | is used. */ | |
3143 | no_copyreloc_p | |
3144 | = (info->nocopyreloc | |
3145 | || (h != NULL | |
3146 | && !h->root.linker_def | |
3147 | && !h->root.ldscript_def | |
3148 | && eh->def_protected | |
3149 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))); | |
3150 | ||
3151 | if ((input_section->flags & SEC_ALLOC) != 0 | |
3152 | && (input_section->flags & SEC_READONLY) != 0 | |
3153 | && h != NULL | |
3154 | && ((bfd_link_executable (info) | |
3155 | && ((h->root.type == bfd_link_hash_undefweak | |
3156 | && (eh == NULL | |
3157 | || !UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, | |
3158 | eh))) | |
3159 | || (bfd_link_pie (info) | |
3160 | && !SYMBOL_DEFINED_NON_SHARED_P (h) | |
3161 | && h->def_dynamic) | |
3162 | || (no_copyreloc_p | |
3163 | && h->def_dynamic | |
3164 | && !(h->root.u.def.section->flags & SEC_CODE)))) | |
3165 | || bfd_link_dll (info))) | |
3166 | { | |
0a1b45a2 | 3167 | bool fail = false; |
81e8046d L |
3168 | if (SYMBOL_REFERENCES_LOCAL_P (info, h)) |
3169 | { | |
3170 | /* Symbol is referenced locally. Make sure it is | |
3171 | defined locally. */ | |
3172 | fail = !SYMBOL_DEFINED_NON_SHARED_P (h); | |
3173 | } | |
3174 | else if (bfd_link_pie (info)) | |
3175 | { | |
3176 | /* We can only use PC-relative relocations in PIE | |
3177 | from non-code sections. */ | |
3178 | if (h->type == STT_FUNC | |
3179 | && (sec->flags & SEC_CODE) != 0) | |
0a1b45a2 | 3180 | fail = true; |
81e8046d L |
3181 | } |
3182 | else if (no_copyreloc_p || bfd_link_dll (info)) | |
3183 | { | |
3184 | /* Symbol doesn't need copy reloc and isn't | |
3185 | referenced locally. Don't allow PC-relative | |
3186 | relocations against default and protected | |
3187 | symbols since address of protected function | |
3188 | and location of protected data may not be in | |
3189 | the shared object. */ | |
3190 | fail = (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3191 | || ELF_ST_VISIBILITY (h->other) == STV_PROTECTED); | |
3192 | } | |
3193 | ||
3194 | if (fail) | |
3195 | return elf_x86_64_need_pic (info, input_bfd, input_section, | |
3196 | h, NULL, NULL, howto); | |
3197 | } | |
451875b4 L |
3198 | /* Since x86-64 has PC-relative PLT, we can use PLT in PIE |
3199 | as function address. */ | |
81e8046d L |
3200 | else if (h != NULL |
3201 | && (input_section->flags & SEC_CODE) == 0 | |
3202 | && bfd_link_pie (info) | |
3203 | && h->type == STT_FUNC | |
3204 | && !h->def_regular | |
3205 | && h->def_dynamic) | |
451875b4 | 3206 | goto use_plt; |
6610a52d L |
3207 | /* Fall through. */ |
3208 | ||
70256ad8 AJ |
3209 | case R_X86_64_8: |
3210 | case R_X86_64_16: | |
3211 | case R_X86_64_32: | |
d6ab8113 | 3212 | case R_X86_64_PC64: |
6b3db546 | 3213 | case R_X86_64_64: |
80643fbc | 3214 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 3215 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 3216 | |
dc1e8a47 | 3217 | direct: |
b1e24c02 | 3218 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
3219 | break; |
3220 | ||
aebcc8ff L |
3221 | need_copy_reloc_in_pie = (bfd_link_pie (info) |
3222 | && h != NULL | |
3223 | && (h->needs_copy | |
3224 | || eh->needs_copy | |
3225 | || (h->root.type | |
3226 | == bfd_link_hash_undefined)) | |
3227 | && (X86_PCREL_TYPE_P (r_type) | |
3228 | || X86_SIZE_TYPE_P (r_type))); | |
3229 | ||
382aae06 | 3230 | if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type, sec, |
aebcc8ff | 3231 | need_copy_reloc_in_pie, |
0a1b45a2 | 3232 | resolved_to_zero, false)) |
70256ad8 AJ |
3233 | { |
3234 | Elf_Internal_Rela outrel; | |
0a1b45a2 | 3235 | bool skip, relocate; |
c434dee6 | 3236 | asection *sreloc; |
68b00778 | 3237 | const char *relative_reloc_name = NULL; |
70256ad8 AJ |
3238 | |
3239 | /* When generating a shared object, these relocations | |
3240 | are copied into the output file to be resolved at run | |
407443a3 | 3241 | time. */ |
0a1b45a2 AM |
3242 | skip = false; |
3243 | relocate = false; | |
70256ad8 | 3244 | |
c629eae0 JJ |
3245 | outrel.r_offset = |
3246 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 3247 | rel->r_offset); |
c629eae0 | 3248 | if (outrel.r_offset == (bfd_vma) -1) |
0a1b45a2 | 3249 | skip = true; |
0fb19cbc | 3250 | else if (outrel.r_offset == (bfd_vma) -2) |
0a1b45a2 | 3251 | skip = true, relocate = true; |
70256ad8 AJ |
3252 | |
3253 | outrel.r_offset += (input_section->output_section->vma | |
3254 | + input_section->output_offset); | |
3255 | ||
3256 | if (skip) | |
0bb2d96a | 3257 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 3258 | |
e74399c4 | 3259 | else if (COPY_INPUT_RELOC_P (info, h, r_type)) |
70256ad8 | 3260 | { |
351f65ca | 3261 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 3262 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
3263 | } |
3264 | else | |
3265 | { | |
4c10bbaa L |
3266 | /* This symbol is local, or marked to become local. |
3267 | When relocation overflow check is disabled, we | |
3268 | convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
3269 | if (r_type == htab->pointer_r_type | |
3270 | || (r_type == R_X86_64_32 | |
5b9c07b2 | 3271 | && htab->params->no_reloc_overflow_check)) |
607c0e09 | 3272 | { |
0a1b45a2 | 3273 | relocate = true; |
351f65ca | 3274 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 | 3275 | outrel.r_addend = relocation + rel->r_addend; |
68b00778 | 3276 | relative_reloc_name = "R_X86_64_RELATIVE"; |
607c0e09 | 3277 | } |
64d25c44 L |
3278 | else if (r_type == R_X86_64_64 |
3279 | && !ABI_64_P (output_bfd)) | |
3280 | { | |
0a1b45a2 | 3281 | relocate = true; |
64d25c44 L |
3282 | outrel.r_info = htab->r_info (0, |
3283 | R_X86_64_RELATIVE64); | |
3284 | outrel.r_addend = relocation + rel->r_addend; | |
68b00778 | 3285 | relative_reloc_name = "R_X86_64_RELATIVE64"; |
8cf0d2dd L |
3286 | /* Check addend overflow. */ |
3287 | if ((outrel.r_addend & 0x80000000) | |
3288 | != (rel->r_addend & 0x80000000)) | |
3289 | { | |
3290 | const char *name; | |
268a8d3a | 3291 | int addend = rel->r_addend; |
8cf0d2dd L |
3292 | if (h && h->root.root.string) |
3293 | name = h->root.root.string; | |
3294 | else | |
3295 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3296 | sym, NULL); | |
d42c267e AM |
3297 | _bfd_error_handler |
3298 | /* xgettext:c-format */ | |
871b3ab2 | 3299 | (_("%pB: addend %s%#x in relocation %s against " |
2dcf00ce AM |
3300 | "symbol `%s' at %#" PRIx64 |
3301 | " in section `%pA' is out of range"), | |
d42c267e | 3302 | input_bfd, addend < 0 ? "-" : "", addend, |
2dcf00ce AM |
3303 | howto->name, name, (uint64_t) rel->r_offset, |
3304 | input_section); | |
8cf0d2dd | 3305 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 3306 | return false; |
8cf0d2dd | 3307 | } |
64d25c44 | 3308 | } |
607c0e09 AS |
3309 | else |
3310 | { | |
3311 | long sindx; | |
3312 | ||
8517fae7 | 3313 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
3314 | sindx = 0; |
3315 | else if (sec == NULL || sec->owner == NULL) | |
3316 | { | |
3317 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 3318 | return false; |
607c0e09 AS |
3319 | } |
3320 | else | |
3321 | { | |
3322 | asection *osec; | |
3323 | ||
74541ad4 AM |
3324 | /* We are turning this relocation into one |
3325 | against a section symbol. It would be | |
3326 | proper to subtract the symbol's value, | |
3327 | osec->vma, from the emitted reloc addend, | |
3328 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
3329 | osec = sec->output_section; |
3330 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
3331 | if (sindx == 0) |
3332 | { | |
3333 | asection *oi = htab->elf.text_index_section; | |
3334 | sindx = elf_section_data (oi)->dynindx; | |
3335 | } | |
3336 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
3337 | } |
3338 | ||
351f65ca | 3339 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
3340 | outrel.r_addend = relocation + rel->r_addend; |
3341 | } | |
70256ad8 AJ |
3342 | } |
3343 | ||
cbe950e9 | 3344 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 3345 | |
62d78908 L |
3346 | if (sreloc == NULL || sreloc->contents == NULL) |
3347 | { | |
3348 | r = bfd_reloc_notsupported; | |
3349 | goto check_relocation_error; | |
3350 | } | |
c434dee6 | 3351 | |
68b00778 L |
3352 | if (relative_reloc_name |
3353 | && htab->params->report_relative_reloc) | |
3354 | _bfd_x86_elf_link_report_relative_reloc | |
3355 | (info, input_section, h, sym, relative_reloc_name, | |
3356 | &outrel); | |
3357 | ||
351f65ca | 3358 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
3359 | |
3360 | /* If this reloc is against an external symbol, we do | |
3361 | not want to fiddle with the addend. Otherwise, we | |
3362 | need to include the symbol value so that it becomes | |
3363 | an addend for the dynamic reloc. */ | |
0f88be7a | 3364 | if (! relocate) |
70256ad8 AJ |
3365 | continue; |
3366 | } | |
3367 | ||
3368 | break; | |
3369 | ||
bffbf940 | 3370 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
3371 | case R_X86_64_GOTPC32_TLSDESC: |
3372 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 3373 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
3374 | tls_type = GOT_UNKNOWN; |
3375 | if (h == NULL && local_got_offsets) | |
0afcef53 | 3376 | tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 3377 | else if (h != NULL) |
0afcef53 | 3378 | tls_type = elf_x86_hash_entry (h)->tls_type; |
142411ca | 3379 | |
419414ea | 3380 | r_type_tls = r_type; |
351f65ca L |
3381 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3382 | input_section, contents, | |
3383 | symtab_hdr, sym_hashes, | |
419414ea | 3384 | &r_type_tls, tls_type, rel, |
0a1b45a2 AM |
3385 | relend, h, r_symndx, true)) |
3386 | return false; | |
bffbf940 | 3387 | |
419414ea | 3388 | if (r_type_tls == R_X86_64_TPOFF32) |
bffbf940 | 3389 | { |
142411ca L |
3390 | bfd_vma roff = rel->r_offset; |
3391 | ||
bffbf940 | 3392 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 3393 | |
419414ea | 3394 | if (r_type == R_X86_64_TLSGD) |
bffbf940 | 3395 | { |
52bc799a | 3396 | /* GD->LE transition. For 64bit, change |
e2cbcd91 L |
3397 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3398 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3399 | or | |
3400 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3401 | .byte 0x66; rex64 | |
3402 | call *__tls_get_addr@GOTPCREL(%rip) | |
3403 | which may be converted to | |
3404 | addr32 call __tls_get_addr | |
52bc799a | 3405 | into: |
e2cbcd91 L |
3406 | movq %fs:0, %rax |
3407 | leaq foo@tpoff(%rax), %rax | |
52bc799a | 3408 | For 32bit, change |
e2cbcd91 L |
3409 | leaq foo@tlsgd(%rip), %rdi |
3410 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3411 | or | |
3412 | leaq foo@tlsgd(%rip), %rdi | |
3413 | .byte 0x66; rex64 | |
3414 | call *__tls_get_addr@GOTPCREL(%rip) | |
3415 | which may be converted to | |
3416 | addr32 call __tls_get_addr | |
52bc799a | 3417 | into: |
e2cbcd91 L |
3418 | movl %fs:0, %eax |
3419 | leaq foo@tpoff(%rax), %rax | |
5c98a14e | 3420 | For largepic, change: |
e2cbcd91 L |
3421 | leaq foo@tlsgd(%rip), %rdi |
3422 | movabsq $__tls_get_addr@pltoff, %rax | |
3423 | addq %r15, %rax | |
3424 | call *%rax | |
5c98a14e | 3425 | into: |
e2cbcd91 L |
3426 | movq %fs:0, %rax |
3427 | leaq foo@tpoff(%rax), %rax | |
3428 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 3429 | int largepic = 0; |
e2cbcd91 | 3430 | if (ABI_64_P (output_bfd)) |
5c98a14e | 3431 | { |
e2cbcd91 L |
3432 | if (contents[roff + 5] == 0xb8) |
3433 | { | |
418d4036 L |
3434 | if (roff < 3 |
3435 | || (roff - 3 + 22) > input_section->size) | |
3436 | { | |
dc1e8a47 | 3437 | corrupt_input: |
418d4036 L |
3438 | info->callbacks->einfo |
3439 | (_("%F%P: corrupt input: %pB\n"), | |
3440 | input_bfd); | |
0a1b45a2 | 3441 | return false; |
418d4036 | 3442 | } |
e2cbcd91 L |
3443 | memcpy (contents + roff - 3, |
3444 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
3445 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
3446 | largepic = 1; | |
3447 | } | |
3448 | else | |
418d4036 L |
3449 | { |
3450 | if (roff < 4 | |
3451 | || (roff - 4 + 16) > input_section->size) | |
3452 | goto corrupt_input; | |
3453 | memcpy (contents + roff - 4, | |
3454 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3455 | 16); | |
3456 | } | |
5c98a14e | 3457 | } |
52bc799a | 3458 | else |
418d4036 L |
3459 | { |
3460 | if (roff < 3 | |
3461 | || (roff - 3 + 15) > input_section->size) | |
3462 | goto corrupt_input; | |
3463 | memcpy (contents + roff - 3, | |
3464 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3465 | 15); | |
3466 | } | |
eb4ff4d6 | 3467 | bfd_put_32 (output_bfd, |
351f65ca | 3468 | elf_x86_64_tpoff (info, relocation), |
5c98a14e | 3469 | contents + roff + 8 + largepic); |
e2cbcd91 L |
3470 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, |
3471 | R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */ | |
bffbf940 | 3472 | rel++; |
60f2e42e | 3473 | wrel++; |
bffbf940 JJ |
3474 | continue; |
3475 | } | |
419414ea | 3476 | else if (r_type == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
3477 | { |
3478 | /* GDesc -> LE transition. | |
3479 | It's originally something like: | |
14470f07 L |
3480 | leaq x@tlsdesc(%rip), %rax <--- LP64 mode. |
3481 | rex leal x@tlsdesc(%rip), %eax <--- X32 mode. | |
67a4f2b7 AO |
3482 | |
3483 | Change it to: | |
14470f07 L |
3484 | movq $x@tpoff, %rax <--- LP64 mode. |
3485 | rex movl $x@tpoff, %eax <--- X32 mode. | |
3486 | */ | |
67a4f2b7 | 3487 | |
c9736ba0 | 3488 | unsigned int val, type; |
67a4f2b7 | 3489 | |
418d4036 L |
3490 | if (roff < 3) |
3491 | goto corrupt_input; | |
67a4f2b7 | 3492 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 3493 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
14470f07 L |
3494 | bfd_put_8 (output_bfd, |
3495 | (type & 0x48) | ((type >> 2) & 1), | |
67a4f2b7 AO |
3496 | contents + roff - 3); |
3497 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
3498 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3499 | contents + roff - 1); | |
eb4ff4d6 | 3500 | bfd_put_32 (output_bfd, |
351f65ca | 3501 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
3502 | contents + roff); |
3503 | continue; | |
3504 | } | |
419414ea | 3505 | else if (r_type == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
3506 | { |
3507 | /* GDesc -> LE transition. | |
3508 | It's originally: | |
14470f07 L |
3509 | call *(%rax) <--- LP64 mode. |
3510 | call *(%eax) <--- X32 mode. | |
67a4f2b7 | 3511 | Turn it into: |
14470f07 L |
3512 | xchg %ax,%ax <-- LP64 mode. |
3513 | nopl (%rax) <-- X32 mode. | |
3514 | */ | |
3515 | unsigned int prefix = 0; | |
3516 | if (!ABI_64_P (input_bfd)) | |
3517 | { | |
3518 | /* Check for call *x@tlsdesc(%eax). */ | |
3519 | if (contents[roff] == 0x67) | |
3520 | prefix = 1; | |
3521 | } | |
3522 | if (prefix) | |
3523 | { | |
3524 | bfd_put_8 (output_bfd, 0x0f, contents + roff); | |
3525 | bfd_put_8 (output_bfd, 0x1f, contents + roff + 1); | |
3526 | bfd_put_8 (output_bfd, 0x00, contents + roff + 2); | |
3527 | } | |
3528 | else | |
3529 | { | |
3530 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
3531 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
3532 | } | |
67a4f2b7 AO |
3533 | continue; |
3534 | } | |
419414ea | 3535 | else if (r_type == R_X86_64_GOTTPOFF) |
bffbf940 | 3536 | { |
bffbf940 | 3537 | /* IE->LE transition: |
cf61b747 | 3538 | For 64bit, originally it can be one of: |
bffbf940 JJ |
3539 | movq foo@gottpoff(%rip), %reg |
3540 | addq foo@gottpoff(%rip), %reg | |
3541 | We change it into: | |
3542 | movq $foo, %reg | |
3543 | leaq foo(%reg), %reg | |
cf61b747 L |
3544 | addq $foo, %reg. |
3545 | For 32bit, originally it can be one of: | |
3546 | movq foo@gottpoff(%rip), %reg | |
3547 | addl foo@gottpoff(%rip), %reg | |
3548 | We change it into: | |
3549 | movq $foo, %reg | |
3550 | leal foo(%reg), %reg | |
3551 | addl $foo, %reg. */ | |
142411ca L |
3552 | |
3553 | unsigned int val, type, reg; | |
3554 | ||
cf61b747 L |
3555 | if (roff >= 3) |
3556 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
3557 | else | |
418d4036 L |
3558 | { |
3559 | if (roff < 2) | |
3560 | goto corrupt_input; | |
3561 | val = 0; | |
3562 | } | |
142411ca L |
3563 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
3564 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 3565 | reg >>= 3; |
bffbf940 JJ |
3566 | if (type == 0x8b) |
3567 | { | |
3568 | /* movq */ | |
3569 | if (val == 0x4c) | |
418d4036 L |
3570 | { |
3571 | if (roff < 3) | |
3572 | goto corrupt_input; | |
3573 | bfd_put_8 (output_bfd, 0x49, | |
3574 | contents + roff - 3); | |
3575 | } | |
4a4c5f25 | 3576 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
418d4036 L |
3577 | { |
3578 | if (roff < 3) | |
3579 | goto corrupt_input; | |
3580 | bfd_put_8 (output_bfd, 0x41, | |
3581 | contents + roff - 3); | |
3582 | } | |
bffbf940 | 3583 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 3584 | contents + roff - 2); |
bffbf940 | 3585 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3586 | contents + roff - 1); |
bffbf940 JJ |
3587 | } |
3588 | else if (reg == 4) | |
3589 | { | |
cf61b747 L |
3590 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
3591 | is special */ | |
bffbf940 | 3592 | if (val == 0x4c) |
418d4036 L |
3593 | { |
3594 | if (roff < 3) | |
3595 | goto corrupt_input; | |
3596 | bfd_put_8 (output_bfd, 0x49, | |
3597 | contents + roff - 3); | |
3598 | } | |
4a4c5f25 | 3599 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
418d4036 L |
3600 | { |
3601 | if (roff < 3) | |
3602 | goto corrupt_input; | |
3603 | bfd_put_8 (output_bfd, 0x41, | |
3604 | contents + roff - 3); | |
3605 | } | |
bffbf940 | 3606 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 3607 | contents + roff - 2); |
bffbf940 | 3608 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3609 | contents + roff - 1); |
bffbf940 JJ |
3610 | } |
3611 | else | |
3612 | { | |
cf61b747 | 3613 | /* addq/addl -> leaq/leal */ |
bffbf940 | 3614 | if (val == 0x4c) |
418d4036 L |
3615 | { |
3616 | if (roff < 3) | |
3617 | goto corrupt_input; | |
3618 | bfd_put_8 (output_bfd, 0x4d, | |
3619 | contents + roff - 3); | |
3620 | } | |
4a4c5f25 | 3621 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
418d4036 L |
3622 | { |
3623 | if (roff < 3) | |
3624 | goto corrupt_input; | |
3625 | bfd_put_8 (output_bfd, 0x45, | |
3626 | contents + roff - 3); | |
3627 | } | |
bffbf940 | 3628 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 3629 | contents + roff - 2); |
bffbf940 | 3630 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 3631 | contents + roff - 1); |
bffbf940 | 3632 | } |
eb4ff4d6 | 3633 | bfd_put_32 (output_bfd, |
351f65ca | 3634 | elf_x86_64_tpoff (info, relocation), |
142411ca | 3635 | contents + roff); |
bffbf940 JJ |
3636 | continue; |
3637 | } | |
142411ca | 3638 | else |
0a1b45a2 | 3639 | BFD_ASSERT (false); |
bffbf940 JJ |
3640 | } |
3641 | ||
6de2ae4a | 3642 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3643 | abort (); |
3644 | ||
3645 | if (h != NULL) | |
67a4f2b7 AO |
3646 | { |
3647 | off = h->got.offset; | |
0afcef53 | 3648 | offplt = elf_x86_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 3649 | } |
bffbf940 JJ |
3650 | else |
3651 | { | |
3652 | if (local_got_offsets == NULL) | |
3653 | abort (); | |
3654 | ||
3655 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 3656 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
3657 | } |
3658 | ||
3659 | if ((off & 1) != 0) | |
3660 | off &= ~1; | |
26e41594 | 3661 | else |
bffbf940 JJ |
3662 | { |
3663 | Elf_Internal_Rela outrel; | |
bffbf940 | 3664 | int dr_type, indx; |
67a4f2b7 | 3665 | asection *sreloc; |
bffbf940 | 3666 | |
6de2ae4a | 3667 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3668 | abort (); |
3669 | ||
67a4f2b7 AO |
3670 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3671 | ||
3672 | if (GOT_TLS_GDESC_P (tls_type)) | |
3673 | { | |
351f65ca | 3674 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 3675 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
3676 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
3677 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
3678 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3679 | + offplt |
3680 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 3681 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 3682 | if (indx == 0) |
0afcef53 | 3683 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
67a4f2b7 AO |
3684 | else |
3685 | outrel.r_addend = 0; | |
351f65ca | 3686 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
3687 | } |
3688 | ||
6de2ae4a | 3689 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 3690 | |
6de2ae4a L |
3691 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3692 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 3693 | |
67a4f2b7 | 3694 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 3695 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
3696 | else if (GOT_TLS_GDESC_P (tls_type)) |
3697 | goto dr_done; | |
bffbf940 JJ |
3698 | else |
3699 | dr_type = R_X86_64_TPOFF64; | |
3700 | ||
6de2ae4a | 3701 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 3702 | outrel.r_addend = 0; |
67a4f2b7 AO |
3703 | if ((dr_type == R_X86_64_TPOFF64 |
3704 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
0afcef53 | 3705 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
351f65ca | 3706 | outrel.r_info = htab->r_info (indx, dr_type); |
bffbf940 | 3707 | |
351f65ca | 3708 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 3709 | |
67a4f2b7 | 3710 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
3711 | { |
3712 | if (indx == 0) | |
3713 | { | |
d40d037c | 3714 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 3715 | bfd_put_64 (output_bfd, |
0afcef53 | 3716 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3717 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
3718 | } |
3719 | else | |
3720 | { | |
3721 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3722 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 3723 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
3724 | R_X86_64_DTPOFF64); |
3725 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 3726 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 3727 | &outrel); |
bffbf940 JJ |
3728 | } |
3729 | } | |
3730 | ||
67a4f2b7 | 3731 | dr_done: |
bffbf940 JJ |
3732 | if (h != NULL) |
3733 | h->got.offset |= 1; | |
3734 | else | |
3735 | local_got_offsets[r_symndx] |= 1; | |
3736 | } | |
3737 | ||
67a4f2b7 AO |
3738 | if (off >= (bfd_vma) -2 |
3739 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 3740 | abort (); |
419414ea | 3741 | if (r_type_tls == r_type) |
bffbf940 | 3742 | { |
67a4f2b7 AO |
3743 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
3744 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
3745 | relocation = htab->elf.sgotplt->output_section->vma |
3746 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3747 | + offplt + htab->sgotplt_jump_table_size; |
3748 | else | |
6de2ae4a L |
3749 | relocation = htab->elf.sgot->output_section->vma |
3750 | + htab->elf.sgot->output_offset + off; | |
0a1b45a2 | 3751 | unresolved_reloc = false; |
bffbf940 | 3752 | } |
142411ca | 3753 | else |
67a4f2b7 | 3754 | { |
142411ca | 3755 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 3756 | |
419414ea | 3757 | if (r_type == R_X86_64_TLSGD) |
142411ca | 3758 | { |
52bc799a | 3759 | /* GD->IE transition. For 64bit, change |
e2cbcd91 L |
3760 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3761 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3762 | or | |
3763 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3764 | .byte 0x66; rex64 | |
3765 | call *__tls_get_addr@GOTPCREL(%rip | |
3766 | which may be converted to | |
3767 | addr32 call __tls_get_addr | |
52bc799a | 3768 | into: |
e2cbcd91 L |
3769 | movq %fs:0, %rax |
3770 | addq foo@gottpoff(%rip), %rax | |
52bc799a | 3771 | For 32bit, change |
e2cbcd91 L |
3772 | leaq foo@tlsgd(%rip), %rdi |
3773 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3774 | or | |
3775 | leaq foo@tlsgd(%rip), %rdi | |
3776 | .byte 0x66; rex64; | |
3777 | call *__tls_get_addr@GOTPCREL(%rip) | |
3778 | which may be converted to | |
3779 | addr32 call __tls_get_addr | |
52bc799a | 3780 | into: |
e2cbcd91 L |
3781 | movl %fs:0, %eax |
3782 | addq foo@gottpoff(%rip), %rax | |
5c98a14e | 3783 | For largepic, change: |
e2cbcd91 L |
3784 | leaq foo@tlsgd(%rip), %rdi |
3785 | movabsq $__tls_get_addr@pltoff, %rax | |
3786 | addq %r15, %rax | |
3787 | call *%rax | |
5c98a14e | 3788 | into: |
e2cbcd91 L |
3789 | movq %fs:0, %rax |
3790 | addq foo@gottpoff(%rax), %rax | |
3791 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 3792 | int largepic = 0; |
e2cbcd91 | 3793 | if (ABI_64_P (output_bfd)) |
5c98a14e | 3794 | { |
e2cbcd91 L |
3795 | if (contents[roff + 5] == 0xb8) |
3796 | { | |
418d4036 L |
3797 | if (roff < 3 |
3798 | || (roff - 3 + 22) > input_section->size) | |
3799 | goto corrupt_input; | |
e2cbcd91 L |
3800 | memcpy (contents + roff - 3, |
3801 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
3802 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
3803 | largepic = 1; | |
3804 | } | |
3805 | else | |
418d4036 L |
3806 | { |
3807 | if (roff < 4 | |
3808 | || (roff - 4 + 16) > input_section->size) | |
3809 | goto corrupt_input; | |
3810 | memcpy (contents + roff - 4, | |
3811 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3812 | 16); | |
3813 | } | |
5c98a14e | 3814 | } |
52bc799a | 3815 | else |
418d4036 L |
3816 | { |
3817 | if (roff < 3 | |
3818 | || (roff - 3 + 15) > input_section->size) | |
3819 | goto corrupt_input; | |
3820 | memcpy (contents + roff - 3, | |
3821 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3822 | 15); | |
3823 | } | |
142411ca | 3824 | |
6de2ae4a L |
3825 | relocation = (htab->elf.sgot->output_section->vma |
3826 | + htab->elf.sgot->output_offset + off | |
142411ca | 3827 | - roff |
5c98a14e | 3828 | - largepic |
142411ca L |
3829 | - input_section->output_section->vma |
3830 | - input_section->output_offset | |
3831 | - 12); | |
3832 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
3833 | contents + roff + 8 + largepic); |
3834 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 3835 | rel++; |
60f2e42e | 3836 | wrel++; |
142411ca L |
3837 | continue; |
3838 | } | |
419414ea | 3839 | else if (r_type == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
3840 | { |
3841 | /* GDesc -> IE transition. | |
3842 | It's originally something like: | |
14470f07 L |
3843 | leaq x@tlsdesc(%rip), %rax <--- LP64 mode. |
3844 | rex leal x@tlsdesc(%rip), %eax <--- X32 mode. | |
67a4f2b7 | 3845 | |
142411ca | 3846 | Change it to: |
14470f07 L |
3847 | # before xchg %ax,%ax in LP64 mode. |
3848 | movq x@gottpoff(%rip), %rax | |
3849 | # before nopl (%rax) in X32 mode. | |
3850 | rex movl x@gottpoff(%rip), %eax | |
3851 | */ | |
67a4f2b7 | 3852 | |
142411ca | 3853 | /* Now modify the instruction as appropriate. To |
14470f07 | 3854 | turn a lea into a mov in the form we use it, it |
142411ca L |
3855 | suffices to change the second byte from 0x8d to |
3856 | 0x8b. */ | |
418d4036 L |
3857 | if (roff < 2) |
3858 | goto corrupt_input; | |
142411ca L |
3859 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); |
3860 | ||
3861 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
3862 | htab->elf.sgot->output_section->vma |
3863 | + htab->elf.sgot->output_offset + off | |
142411ca L |
3864 | - rel->r_offset |
3865 | - input_section->output_section->vma | |
3866 | - input_section->output_offset | |
3867 | - 4, | |
3868 | contents + roff); | |
3869 | continue; | |
3870 | } | |
419414ea | 3871 | else if (r_type == R_X86_64_TLSDESC_CALL) |
142411ca L |
3872 | { |
3873 | /* GDesc -> IE transition. | |
3874 | It's originally: | |
14470f07 L |
3875 | call *(%rax) <--- LP64 mode. |
3876 | call *(%eax) <--- X32 mode. | |
142411ca L |
3877 | |
3878 | Change it to: | |
14470f07 L |
3879 | xchg %ax, %ax <-- LP64 mode. |
3880 | nopl (%rax) <-- X32 mode. | |
3881 | */ | |
142411ca | 3882 | |
14470f07 L |
3883 | unsigned int prefix = 0; |
3884 | if (!ABI_64_P (input_bfd)) | |
3885 | { | |
3886 | /* Check for call *x@tlsdesc(%eax). */ | |
3887 | if (contents[roff] == 0x67) | |
3888 | prefix = 1; | |
3889 | } | |
3890 | if (prefix) | |
3891 | { | |
3892 | bfd_put_8 (output_bfd, 0x0f, contents + roff); | |
3893 | bfd_put_8 (output_bfd, 0x1f, contents + roff + 1); | |
3894 | bfd_put_8 (output_bfd, 0x00, contents + roff + 2); | |
3895 | } | |
3896 | else | |
3897 | { | |
3898 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
3899 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
3900 | } | |
142411ca L |
3901 | continue; |
3902 | } | |
3903 | else | |
0a1b45a2 | 3904 | BFD_ASSERT (false); |
67a4f2b7 | 3905 | } |
bffbf940 JJ |
3906 | break; |
3907 | ||
3908 | case R_X86_64_TLSLD: | |
351f65ca L |
3909 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3910 | input_section, contents, | |
3911 | symtab_hdr, sym_hashes, | |
bedfd056 | 3912 | &r_type, GOT_UNKNOWN, rel, |
0a1b45a2 AM |
3913 | relend, h, r_symndx, true)) |
3914 | return false; | |
a3fadc9a | 3915 | |
142411ca L |
3916 | if (r_type != R_X86_64_TLSLD) |
3917 | { | |
bffbf940 | 3918 | /* LD->LE transition: |
e2cbcd91 L |
3919 | leaq foo@tlsld(%rip), %rdi |
3920 | call __tls_get_addr@PLT | |
3921 | For 64bit, we change it into: | |
3922 | .word 0x6666; .byte 0x66; movq %fs:0, %rax | |
3923 | For 32bit, we change it into: | |
3924 | nopl 0x0(%rax); movl %fs:0, %eax | |
3925 | Or | |
3926 | leaq foo@tlsld(%rip), %rdi; | |
3927 | call *__tls_get_addr@GOTPCREL(%rip) | |
3928 | which may be converted to | |
3929 | addr32 call __tls_get_addr | |
52bc799a | 3930 | For 64bit, we change it into: |
e2cbcd91 | 3931 | .word 0x6666; .word 0x6666; movq %fs:0, %rax |
52bc799a | 3932 | For 32bit, we change it into: |
e2cbcd91 | 3933 | nopw 0x0(%rax); movl %fs:0, %eax |
5c98a14e | 3934 | For largepic, change: |
e2cbcd91 L |
3935 | leaq foo@tlsgd(%rip), %rdi |
3936 | movabsq $__tls_get_addr@pltoff, %rax | |
3937 | addq %rbx, %rax | |
3938 | call *%rax | |
3939 | into | |
3940 | data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
3941 | movq %fs:0, %eax */ | |
142411ca L |
3942 | |
3943 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
e2cbcd91 L |
3944 | if (ABI_64_P (output_bfd)) |
3945 | { | |
418d4036 L |
3946 | if ((rel->r_offset + 5) >= input_section->size) |
3947 | goto corrupt_input; | |
e2cbcd91 | 3948 | if (contents[rel->r_offset + 5] == 0xb8) |
418d4036 L |
3949 | { |
3950 | if (rel->r_offset < 3 | |
3951 | || (rel->r_offset - 3 + 22) > input_section->size) | |
3952 | goto corrupt_input; | |
3953 | memcpy (contents + rel->r_offset - 3, | |
3954 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
3955 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
3956 | } | |
e2cbcd91 L |
3957 | else if (contents[rel->r_offset + 4] == 0xff |
3958 | || contents[rel->r_offset + 4] == 0x67) | |
418d4036 L |
3959 | { |
3960 | if (rel->r_offset < 3 | |
3961 | || (rel->r_offset - 3 + 13) > input_section->size) | |
3962 | goto corrupt_input; | |
3963 | memcpy (contents + rel->r_offset - 3, | |
3964 | "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", | |
3965 | 13); | |
3966 | ||
3967 | } | |
e2cbcd91 | 3968 | else |
418d4036 L |
3969 | { |
3970 | if (rel->r_offset < 3 | |
3971 | || (rel->r_offset - 3 + 12) > input_section->size) | |
3972 | goto corrupt_input; | |
3973 | memcpy (contents + rel->r_offset - 3, | |
3974 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
3975 | } | |
e2cbcd91 | 3976 | } |
52bc799a | 3977 | else |
e2cbcd91 | 3978 | { |
418d4036 L |
3979 | if ((rel->r_offset + 4) >= input_section->size) |
3980 | goto corrupt_input; | |
e2cbcd91 | 3981 | if (contents[rel->r_offset + 4] == 0xff) |
418d4036 L |
3982 | { |
3983 | if (rel->r_offset < 3 | |
3984 | || (rel->r_offset - 3 + 13) > input_section->size) | |
3985 | goto corrupt_input; | |
3986 | memcpy (contents + rel->r_offset - 3, | |
3987 | "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", | |
3988 | 13); | |
3989 | } | |
e2cbcd91 | 3990 | else |
418d4036 L |
3991 | { |
3992 | if (rel->r_offset < 3 | |
3993 | || (rel->r_offset - 3 + 12) > input_section->size) | |
3994 | goto corrupt_input; | |
3995 | memcpy (contents + rel->r_offset - 3, | |
3996 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
3997 | } | |
e2cbcd91 L |
3998 | } |
3999 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX | |
4000 | and R_X86_64_PLTOFF64. */ | |
bffbf940 | 4001 | rel++; |
60f2e42e | 4002 | wrel++; |
bffbf940 JJ |
4003 | continue; |
4004 | } | |
4005 | ||
6de2ae4a | 4006 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
4007 | abort (); |
4008 | ||
0afcef53 | 4009 | off = htab->tls_ld_or_ldm_got.offset; |
bffbf940 JJ |
4010 | if (off & 1) |
4011 | off &= ~1; | |
4012 | else | |
4013 | { | |
4014 | Elf_Internal_Rela outrel; | |
bffbf940 | 4015 | |
6de2ae4a | 4016 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
4017 | abort (); |
4018 | ||
6de2ae4a L |
4019 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4020 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
4021 | |
4022 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 4023 | htab->elf.sgot->contents + off); |
bffbf940 | 4024 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 4025 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 4026 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 4027 | outrel.r_addend = 0; |
351f65ca | 4028 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 4029 | &outrel); |
0afcef53 | 4030 | htab->tls_ld_or_ldm_got.offset |= 1; |
bffbf940 | 4031 | } |
6de2ae4a L |
4032 | relocation = htab->elf.sgot->output_section->vma |
4033 | + htab->elf.sgot->output_offset + off; | |
0a1b45a2 | 4034 | unresolved_reloc = false; |
bffbf940 JJ |
4035 | break; |
4036 | ||
4037 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
4038 | if (!bfd_link_executable (info) |
4039 | || (input_section->flags & SEC_CODE) == 0) | |
0afcef53 | 4040 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
bffbf940 | 4041 | else |
351f65ca | 4042 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
4043 | break; |
4044 | ||
4045 | case R_X86_64_TPOFF32: | |
6769d501 | 4046 | case R_X86_64_TPOFF64: |
0e1862bb | 4047 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 4048 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
4049 | break; |
4050 | ||
a69ed7f7 L |
4051 | case R_X86_64_DTPOFF64: |
4052 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
0afcef53 | 4053 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
a69ed7f7 L |
4054 | break; |
4055 | ||
70256ad8 AJ |
4056 | default: |
4057 | break; | |
4058 | } | |
8d88c4ca | 4059 | |
239e1f3a AM |
4060 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
4061 | because such sections are not SEC_ALLOC and thus ld.so will | |
4062 | not process them. */ | |
c434dee6 | 4063 | if (unresolved_reloc |
239e1f3a | 4064 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
4065 | && h->def_dynamic) |
4066 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
4067 | rel->r_offset) != (bfd_vma) -1) | |
a040981f | 4068 | { |
7073b5b9 L |
4069 | switch (r_type) |
4070 | { | |
4071 | case R_X86_64_32S: | |
a5b4ee94 L |
4072 | sec = h->root.u.def.section; |
4073 | if ((info->nocopyreloc | |
4074 | || (eh->def_protected | |
4075 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
4076 | && !(h->root.u.def.section->flags & SEC_CODE)) |
4077 | return elf_x86_64_need_pic (info, input_bfd, input_section, | |
4078 | h, NULL, NULL, howto); | |
4079 | /* Fall through. */ | |
4080 | ||
4081 | default: | |
4082 | _bfd_error_handler | |
4083 | /* xgettext:c-format */ | |
2dcf00ce AM |
4084 | (_("%pB(%pA+%#" PRIx64 "): " |
4085 | "unresolvable %s relocation against symbol `%s'"), | |
7073b5b9 L |
4086 | input_bfd, |
4087 | input_section, | |
2dcf00ce | 4088 | (uint64_t) rel->r_offset, |
7073b5b9 L |
4089 | howto->name, |
4090 | h->root.root.string); | |
0a1b45a2 | 4091 | return false; |
7073b5b9 | 4092 | } |
a040981f | 4093 | } |
c434dee6 | 4094 | |
dc1e8a47 | 4095 | do_relocation: |
8d88c4ca | 4096 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
4097 | contents, rel->r_offset, |
4098 | relocation, rel->r_addend); | |
8d88c4ca | 4099 | |
dc1e8a47 | 4100 | check_relocation_error: |
8d88c4ca | 4101 | if (r != bfd_reloc_ok) |
8da6118f | 4102 | { |
c434dee6 AJ |
4103 | const char *name; |
4104 | ||
4105 | if (h != NULL) | |
4106 | name = h->root.root.string; | |
4107 | else | |
8da6118f | 4108 | { |
c434dee6 AJ |
4109 | name = bfd_elf_string_from_elf_section (input_bfd, |
4110 | symtab_hdr->sh_link, | |
4111 | sym->st_name); | |
4112 | if (name == NULL) | |
0a1b45a2 | 4113 | return false; |
c434dee6 | 4114 | if (*name == '\0') |
fd361982 | 4115 | name = bfd_section_name (sec); |
c434dee6 AJ |
4116 | } |
4117 | ||
4118 | if (r == bfd_reloc_overflow) | |
8b43e456 | 4119 | { |
78984959 | 4120 | if (converted_reloc) |
8b43e456 L |
4121 | { |
4122 | info->callbacks->einfo | |
1a2f1b54 L |
4123 | ("%X%H:", input_bfd, input_section, rel->r_offset); |
4124 | info->callbacks->einfo | |
4125 | (_(" failed to convert GOTPCREL relocation against " | |
4126 | "'%s'; relink with --no-relax\n"), | |
4127 | name); | |
0a1b45a2 | 4128 | status = false; |
1a2f1b54 | 4129 | continue; |
8b43e456 L |
4130 | } |
4131 | (*info->callbacks->reloc_overflow) | |
4132 | (info, (h ? &h->root : NULL), name, howto->name, | |
4133 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
4134 | } | |
c434dee6 AJ |
4135 | else |
4136 | { | |
4eca0228 | 4137 | _bfd_error_handler |
695344c0 | 4138 | /* xgettext:c-format */ |
2dcf00ce | 4139 | (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"), |
d003868e | 4140 | input_bfd, input_section, |
2dcf00ce | 4141 | (uint64_t) rel->r_offset, name, (int) r); |
0a1b45a2 | 4142 | return false; |
8da6118f KH |
4143 | } |
4144 | } | |
60f2e42e L |
4145 | |
4146 | if (wrel != rel) | |
4147 | *wrel = *rel; | |
4148 | } | |
4149 | ||
4150 | if (wrel != rel) | |
4151 | { | |
4152 | Elf_Internal_Shdr *rel_hdr; | |
4153 | size_t deleted = rel - wrel; | |
4154 | ||
4155 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
4156 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
4157 | if (rel_hdr->sh_size == 0) | |
4158 | { | |
4159 | /* It is too late to remove an empty reloc section. Leave | |
4160 | one NONE reloc. | |
4161 | ??? What is wrong with an empty section??? */ | |
4162 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
4163 | deleted -= 1; | |
4164 | } | |
4165 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
4166 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
4167 | input_section->reloc_count -= deleted; | |
8d88c4ca | 4168 | } |
70256ad8 | 4169 | |
1a2f1b54 | 4170 | return status; |
70256ad8 AJ |
4171 | } |
4172 | ||
4173 | /* Finish up dynamic symbol handling. We set the contents of various | |
4174 | dynamic sections here. */ | |
4175 | ||
0a1b45a2 | 4176 | static bool |
351f65ca L |
4177 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
4178 | struct bfd_link_info *info, | |
4179 | struct elf_link_hash_entry *h, | |
aec6b87e | 4180 | Elf_Internal_Sym *sym) |
70256ad8 | 4181 | { |
0afcef53 | 4182 | struct elf_x86_link_hash_table *htab; |
0a1b45a2 | 4183 | bool use_plt_second; |
0afcef53 | 4184 | struct elf_x86_link_hash_entry *eh; |
0a1b45a2 | 4185 | bool local_undefweak; |
70256ad8 | 4186 | |
0afcef53 | 4187 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 | 4188 | if (htab == NULL) |
0a1b45a2 | 4189 | return false; |
70256ad8 | 4190 | |
f2c29a16 L |
4191 | /* Use the second PLT section only if there is .plt section. */ |
4192 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
0ff2b86e | 4193 | |
0afcef53 | 4194 | eh = (struct elf_x86_link_hash_entry *) h; |
9e9821dd L |
4195 | if (eh->no_finish_dynamic_symbol) |
4196 | abort (); | |
dd7e64d4 | 4197 | |
aec6b87e L |
4198 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
4199 | resolved undefined weak symbols in executable so that their | |
4200 | references have value 0 at run-time. */ | |
c5bce5c6 | 4201 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); |
aec6b87e | 4202 | |
70256ad8 AJ |
4203 | if (h->plt.offset != (bfd_vma) -1) |
4204 | { | |
70256ad8 | 4205 | bfd_vma plt_index; |
38b12349 | 4206 | bfd_vma got_offset, plt_offset; |
70256ad8 | 4207 | Elf_Internal_Rela rela; |
947216bf | 4208 | bfd_byte *loc; |
0ff2b86e | 4209 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 4210 | const struct elf_backend_data *bed; |
5974eba6 | 4211 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
4212 | |
4213 | /* When building a static executable, use .iplt, .igot.plt and | |
4214 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 4215 | if (htab->elf.splt != NULL) |
cbe950e9 | 4216 | { |
6de2ae4a L |
4217 | plt = htab->elf.splt; |
4218 | gotplt = htab->elf.sgotplt; | |
4219 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
4220 | } |
4221 | else | |
4222 | { | |
6de2ae4a L |
4223 | plt = htab->elf.iplt; |
4224 | gotplt = htab->elf.igotplt; | |
4225 | relplt = htab->elf.irelplt; | |
cbe950e9 | 4226 | } |
70256ad8 | 4227 | |
f3180fa9 | 4228 | VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak) |
70256ad8 AJ |
4229 | |
4230 | /* Get the index in the procedure linkage table which | |
4231 | corresponds to this symbol. This is the index of this symbol | |
4232 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 4233 | first entry in the procedure linkage table is reserved. |
6bbec505 | 4234 | |
cbe950e9 | 4235 | Get the offset into the .got table of the entry that |
407443a3 | 4236 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
4237 | bytes. The first three are reserved for the dynamic linker. |
4238 | ||
4239 | For static executables, we don't reserve anything. */ | |
4240 | ||
6de2ae4a | 4241 | if (plt == htab->elf.splt) |
cbe950e9 | 4242 | { |
765e526c L |
4243 | got_offset = (h->plt.offset / htab->plt.plt_entry_size |
4244 | - htab->plt.has_plt0); | |
e1f98742 | 4245 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
4246 | } |
4247 | else | |
4248 | { | |
765e526c | 4249 | got_offset = h->plt.offset / htab->plt.plt_entry_size; |
e1f98742 | 4250 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 4251 | } |
70256ad8 | 4252 | |
38b12349 | 4253 | /* Fill in the entry in the procedure linkage table. */ |
765e526c L |
4254 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, |
4255 | htab->plt.plt_entry_size); | |
f2c29a16 | 4256 | if (use_plt_second) |
0ff2b86e | 4257 | { |
f2c29a16 | 4258 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
765e526c L |
4259 | htab->non_lazy_plt->plt_entry, |
4260 | htab->non_lazy_plt->plt_entry_size); | |
0ff2b86e | 4261 | |
f2c29a16 L |
4262 | resolved_plt = htab->plt_second; |
4263 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
4264 | } |
4265 | else | |
4266 | { | |
0ff2b86e L |
4267 | resolved_plt = plt; |
4268 | plt_offset = h->plt.offset; | |
4269 | } | |
eed180f8 RM |
4270 | |
4271 | /* Insert the relocation positions of the plt section. */ | |
4272 | ||
4273 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
4274 | subtracting the size of that instruction. */ | |
ab7fede8 L |
4275 | plt_got_pcrel_offset = (gotplt->output_section->vma |
4276 | + gotplt->output_offset | |
4277 | + got_offset | |
4278 | - resolved_plt->output_section->vma | |
4279 | - resolved_plt->output_offset | |
4280 | - plt_offset | |
765e526c | 4281 | - htab->plt.plt_got_insn_size); |
ab7fede8 L |
4282 | |
4283 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 4284 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
695344c0 | 4285 | /* xgettext:c-format */ |
871b3ab2 | 4286 | info->callbacks->einfo (_("%F%pB: PC-relative offset overflow in PLT entry for `%s'\n"), |
ab7fede8 L |
4287 | output_bfd, h->root.root.string); |
4288 | ||
4289 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
38b12349 | 4290 | (resolved_plt->contents + plt_offset |
765e526c | 4291 | + htab->plt.plt_got_offset)); |
cbe950e9 | 4292 | |
653165cc | 4293 | /* Fill in the entry in the global offset table, initially this |
aec6b87e L |
4294 | points to the second part of the PLT entry. Leave the entry |
4295 | as zero for undefined weak symbol in PIE. No PLT relocation | |
4296 | against undefined weak symbol in PIE. */ | |
4297 | if (!local_undefweak) | |
cbe950e9 | 4298 | { |
765e526c | 4299 | if (htab->plt.has_plt0) |
38b12349 L |
4300 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4301 | + plt->output_offset | |
4302 | + h->plt.offset | |
765e526c | 4303 | + htab->lazy_plt->plt_lazy_offset), |
38b12349 | 4304 | gotplt->contents + got_offset); |
aec6b87e L |
4305 | |
4306 | /* Fill in the entry in the .rela.plt section. */ | |
4307 | rela.r_offset = (gotplt->output_section->vma | |
4308 | + gotplt->output_offset | |
4309 | + got_offset); | |
cf1070f1 | 4310 | if (PLT_LOCAL_IFUNC_P (info, h)) |
aec6b87e | 4311 | { |
871b3ab2 | 4312 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
4313 | h->root.root.string, |
4314 | h->root.u.def.section->owner); | |
4315 | ||
aec6b87e L |
4316 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
4317 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
4318 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); | |
4319 | rela.r_addend = (h->root.u.def.value | |
4320 | + h->root.u.def.section->output_section->vma | |
4321 | + h->root.u.def.section->output_offset); | |
68b00778 L |
4322 | |
4323 | if (htab->params->report_relative_reloc) | |
4324 | _bfd_x86_elf_link_report_relative_reloc | |
4325 | (info, relplt, h, sym, "R_X86_64_IRELATIVE", &rela); | |
4326 | ||
aec6b87e L |
4327 | /* R_X86_64_IRELATIVE comes last. */ |
4328 | plt_index = htab->next_irelative_index--; | |
4329 | } | |
4330 | else | |
4331 | { | |
4332 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); | |
4333 | rela.r_addend = 0; | |
4334 | plt_index = htab->next_jump_slot_index++; | |
4335 | } | |
e1f98742 | 4336 | |
38b12349 L |
4337 | /* Don't fill the second and third slots in PLT entry for |
4338 | static executables nor without PLT0. */ | |
765e526c | 4339 | if (plt == htab->elf.splt && htab->plt.has_plt0) |
aec6b87e | 4340 | { |
38b12349 | 4341 | bfd_vma plt0_offset |
765e526c | 4342 | = h->plt.offset + htab->lazy_plt->plt_plt_insn_end; |
aec6b87e L |
4343 | |
4344 | /* Put relocation index. */ | |
4345 | bfd_put_32 (output_bfd, plt_index, | |
4346 | (plt->contents + h->plt.offset | |
765e526c | 4347 | + htab->lazy_plt->plt_reloc_offset)); |
aec6b87e L |
4348 | |
4349 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
4350 | check relocation index for overflow since branch displacement | |
4351 | will overflow first. */ | |
4352 | if (plt0_offset > 0x80000000) | |
695344c0 | 4353 | /* xgettext:c-format */ |
871b3ab2 | 4354 | info->callbacks->einfo (_("%F%pB: branch displacement overflow in PLT entry for `%s'\n"), |
aec6b87e L |
4355 | output_bfd, h->root.root.string); |
4356 | bfd_put_32 (output_bfd, - plt0_offset, | |
38b12349 | 4357 | (plt->contents + h->plt.offset |
765e526c | 4358 | + htab->lazy_plt->plt_plt_offset)); |
aec6b87e | 4359 | } |
351f65ca | 4360 | |
aec6b87e L |
4361 | bed = get_elf_backend_data (output_bfd); |
4362 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
4363 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
4364 | } | |
dd7e64d4 L |
4365 | } |
4366 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
4367 | { | |
38b12349 | 4368 | bfd_vma got_offset, plt_offset; |
dd7e64d4 | 4369 | asection *plt, *got; |
0a1b45a2 | 4370 | bool got_after_plt; |
dd7e64d4 | 4371 | int32_t got_pcrel_offset; |
dd7e64d4 L |
4372 | |
4373 | /* Set the entry in the GOT procedure linkage table. */ | |
4374 | plt = htab->plt_got; | |
4375 | got = htab->elf.sgot; | |
4376 | got_offset = h->got.offset; | |
4377 | ||
4378 | if (got_offset == (bfd_vma) -1 | |
e492d2f8 | 4379 | || (h->type == STT_GNU_IFUNC && h->def_regular) |
dd7e64d4 L |
4380 | || plt == NULL |
4381 | || got == NULL) | |
4382 | abort (); | |
70256ad8 | 4383 | |
38b12349 | 4384 | /* Use the non-lazy PLT entry template for the GOT PLT since they |
dd7e64d4 | 4385 | are the identical. */ |
dd7e64d4 L |
4386 | /* Fill in the entry in the GOT procedure linkage table. */ |
4387 | plt_offset = eh->plt_got.offset; | |
4388 | memcpy (plt->contents + plt_offset, | |
765e526c L |
4389 | htab->non_lazy_plt->plt_entry, |
4390 | htab->non_lazy_plt->plt_entry_size); | |
dd7e64d4 L |
4391 | |
4392 | /* Put offset the PC-relative instruction referring to the GOT | |
4393 | entry, subtracting the size of that instruction. */ | |
4394 | got_pcrel_offset = (got->output_section->vma | |
4395 | + got->output_offset | |
4396 | + got_offset | |
4397 | - plt->output_section->vma | |
4398 | - plt->output_offset | |
4399 | - plt_offset | |
765e526c | 4400 | - htab->non_lazy_plt->plt_got_insn_size); |
dd7e64d4 L |
4401 | |
4402 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
4403 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
4404 | if ((got_after_plt && got_pcrel_offset < 0) | |
4405 | || (!got_after_plt && got_pcrel_offset > 0)) | |
695344c0 | 4406 | /* xgettext:c-format */ |
871b3ab2 | 4407 | info->callbacks->einfo (_("%F%pB: PC-relative offset overflow in GOT PLT entry for `%s'\n"), |
dd7e64d4 L |
4408 | output_bfd, h->root.root.string); |
4409 | ||
4410 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
38b12349 | 4411 | (plt->contents + plt_offset |
765e526c | 4412 | + htab->non_lazy_plt->plt_got_offset)); |
dd7e64d4 L |
4413 | } |
4414 | ||
aec6b87e L |
4415 | if (!local_undefweak |
4416 | && !h->def_regular | |
dd7e64d4 L |
4417 | && (h->plt.offset != (bfd_vma) -1 |
4418 | || eh->plt_got.offset != (bfd_vma) -1)) | |
4419 | { | |
4420 | /* Mark the symbol as undefined, rather than as defined in | |
4421 | the .plt section. Leave the value if there were any | |
4422 | relocations where pointer equality matters (this is a clue | |
4423 | for the dynamic linker, to make function pointer | |
4424 | comparisons work between an application and shared | |
4425 | library), otherwise set it to zero. If a function is only | |
4426 | called from a binary, there is no need to slow down | |
4427 | shared libraries because of that. */ | |
4428 | sym->st_shndx = SHN_UNDEF; | |
4429 | if (!h->pointer_equality_needed) | |
4430 | sym->st_value = 0; | |
70256ad8 AJ |
4431 | } |
4432 | ||
4ec09950 L |
4433 | _bfd_x86_elf_link_fixup_ifunc_symbol (info, htab, h, sym); |
4434 | ||
aec6b87e L |
4435 | /* Don't generate dynamic GOT relocation against undefined weak |
4436 | symbol in executable. */ | |
bffbf940 | 4437 | if (h->got.offset != (bfd_vma) -1 |
0afcef53 L |
4438 | && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h)->tls_type) |
4439 | && elf_x86_hash_entry (h)->tls_type != GOT_TLS_IE | |
aec6b87e | 4440 | && !local_undefweak) |
053579d7 | 4441 | { |
053579d7 | 4442 | Elf_Internal_Rela rela; |
233cc9c1 | 4443 | asection *relgot = htab->elf.srelgot; |
68b00778 | 4444 | const char *relative_reloc_name = NULL; |
053579d7 AJ |
4445 | |
4446 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 4447 | up. */ |
6de2ae4a | 4448 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 4449 | abort (); |
053579d7 | 4450 | |
6de2ae4a L |
4451 | rela.r_offset = (htab->elf.sgot->output_section->vma |
4452 | + htab->elf.sgot->output_offset | |
dc810e39 | 4453 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
4454 | |
4455 | /* If this is a static link, or it is a -Bsymbolic link and the | |
4456 | symbol is defined locally or was forced to be local because | |
4457 | of a version file, we just want to emit a RELATIVE reloc. | |
4458 | The entry in the global offset table will already have been | |
4459 | initialized in the relocate_section function. */ | |
710ab287 | 4460 | if (h->def_regular |
0018b0a3 L |
4461 | && h->type == STT_GNU_IFUNC) |
4462 | { | |
233cc9c1 L |
4463 | if (h->plt.offset == (bfd_vma) -1) |
4464 | { | |
4465 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
4466 | if (htab->elf.splt == NULL) | |
4467 | { | |
4468 | /* use .rel[a].iplt section to store .got relocations | |
4469 | in static executable. */ | |
4470 | relgot = htab->elf.irelplt; | |
4471 | } | |
6999821f | 4472 | if (SYMBOL_REFERENCES_LOCAL_P (info, h)) |
233cc9c1 | 4473 | { |
871b3ab2 | 4474 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
4475 | h->root.root.string, |
4476 | h->root.u.def.section->owner); | |
4477 | ||
233cc9c1 L |
4478 | rela.r_info = htab->r_info (0, |
4479 | R_X86_64_IRELATIVE); | |
4480 | rela.r_addend = (h->root.u.def.value | |
4481 | + h->root.u.def.section->output_section->vma | |
4482 | + h->root.u.def.section->output_offset); | |
68b00778 | 4483 | relative_reloc_name = "R_X86_64_IRELATIVE"; |
233cc9c1 L |
4484 | } |
4485 | else | |
4486 | goto do_glob_dat; | |
4487 | } | |
4488 | else if (bfd_link_pic (info)) | |
710ab287 L |
4489 | { |
4490 | /* Generate R_X86_64_GLOB_DAT. */ | |
4491 | goto do_glob_dat; | |
4492 | } | |
4493 | else | |
4494 | { | |
90d60710 | 4495 | asection *plt; |
aab82f4c | 4496 | bfd_vma plt_offset; |
90d60710 | 4497 | |
710ab287 L |
4498 | if (!h->pointer_equality_needed) |
4499 | abort (); | |
4500 | ||
4501 | /* For non-shared object, we can't use .got.plt, which | |
4502 | contains the real function addres if we need pointer | |
4503 | equality. We load the GOT entry with the PLT entry. */ | |
f2c29a16 | 4504 | if (htab->plt_second != NULL) |
aab82f4c | 4505 | { |
f2c29a16 L |
4506 | plt = htab->plt_second; |
4507 | plt_offset = eh->plt_second.offset; | |
aab82f4c L |
4508 | } |
4509 | else | |
4510 | { | |
4511 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
4512 | plt_offset = h->plt.offset; | |
4513 | } | |
710ab287 L |
4514 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4515 | + plt->output_offset | |
aab82f4c | 4516 | + plt_offset), |
6de2ae4a | 4517 | htab->elf.sgot->contents + h->got.offset); |
0a1b45a2 | 4518 | return true; |
710ab287 | 4519 | } |
0018b0a3 | 4520 | } |
0e1862bb | 4521 | else if (bfd_link_pic (info) |
6999821f | 4522 | && SYMBOL_REFERENCES_LOCAL_P (info, h)) |
053579d7 | 4523 | { |
83924b38 | 4524 | if (!SYMBOL_DEFINED_NON_SHARED_P (h)) |
0a1b45a2 | 4525 | return false; |
cc78d0af | 4526 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 4527 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
4528 | rela.r_addend = (h->root.u.def.value |
4529 | + h->root.u.def.section->output_section->vma | |
4530 | + h->root.u.def.section->output_offset); | |
68b00778 | 4531 | relative_reloc_name = "R_X86_64_RELATIVE"; |
053579d7 AJ |
4532 | } |
4533 | else | |
4534 | { | |
4535 | BFD_ASSERT((h->got.offset & 1) == 0); | |
dc1e8a47 | 4536 | do_glob_dat: |
c434dee6 | 4537 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4538 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 4539 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
4540 | rela.r_addend = 0; |
4541 | } | |
4542 | ||
68b00778 L |
4543 | if (relative_reloc_name != NULL |
4544 | && htab->params->report_relative_reloc) | |
4545 | _bfd_x86_elf_link_report_relative_reloc | |
4546 | (info, relgot, h, sym, relative_reloc_name, &rela); | |
4547 | ||
233cc9c1 | 4548 | elf_append_rela (output_bfd, relgot, &rela); |
053579d7 AJ |
4549 | } |
4550 | ||
f5385ebf | 4551 | if (h->needs_copy) |
70256ad8 | 4552 | { |
70256ad8 | 4553 | Elf_Internal_Rela rela; |
5474d94f | 4554 | asection *s; |
70256ad8 AJ |
4555 | |
4556 | /* This symbol needs a copy reloc. Set it up. */ | |
ff38b4cc | 4557 | VERIFY_COPY_RELOC (h, htab) |
70256ad8 AJ |
4558 | |
4559 | rela.r_offset = (h->root.u.def.value | |
4560 | + h->root.u.def.section->output_section->vma | |
4561 | + h->root.u.def.section->output_offset); | |
351f65ca | 4562 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 4563 | rela.r_addend = 0; |
afbf7e8e | 4564 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
4565 | s = htab->elf.sreldynrelro; |
4566 | else | |
4567 | s = htab->elf.srelbss; | |
4568 | elf_append_rela (output_bfd, s, &rela); | |
70256ad8 AJ |
4569 | } |
4570 | ||
0a1b45a2 | 4571 | return true; |
70256ad8 AJ |
4572 | } |
4573 | ||
c25bc9fc L |
4574 | /* Finish up local dynamic symbol handling. We set the contents of |
4575 | various dynamic sections here. */ | |
4576 | ||
1201fda6 | 4577 | static int |
351f65ca | 4578 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
4579 | { |
4580 | struct elf_link_hash_entry *h | |
4581 | = (struct elf_link_hash_entry *) *slot; | |
4582 | struct bfd_link_info *info | |
eed180f8 | 4583 | = (struct bfd_link_info *) inf; |
c25bc9fc | 4584 | |
351f65ca | 4585 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
5f0f0847 | 4586 | info, h, NULL); |
c25bc9fc L |
4587 | } |
4588 | ||
aec6b87e L |
4589 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
4590 | here since undefined weak symbol may not be dynamic and may not be | |
4591 | called for elf_x86_64_finish_dynamic_symbol. */ | |
4592 | ||
0a1b45a2 | 4593 | static bool |
aec6b87e L |
4594 | elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, |
4595 | void *inf) | |
4596 | { | |
4597 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
4598 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
4599 | ||
4600 | if (h->root.type != bfd_link_hash_undefweak | |
4601 | || h->dynindx != -1) | |
0a1b45a2 | 4602 | return true; |
aec6b87e L |
4603 | |
4604 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, | |
5f0f0847 | 4605 | info, h, NULL); |
aec6b87e L |
4606 | } |
4607 | ||
c434dee6 AJ |
4608 | /* Used to decide how to sort relocs in an optimal manner for the |
4609 | dynamic linker, before writing them out. */ | |
4610 | ||
4611 | static enum elf_reloc_type_class | |
cae1fbbb | 4612 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
4613 | const asection *rel_sec ATTRIBUTE_UNUSED, |
4614 | const Elf_Internal_Rela *rela) | |
c434dee6 | 4615 | { |
cae1fbbb L |
4616 | bfd *abfd = info->output_bfd; |
4617 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
0afcef53 L |
4618 | struct elf_x86_link_hash_table *htab |
4619 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
cae1fbbb | 4620 | |
d9e3b590 L |
4621 | if (htab->elf.dynsym != NULL |
4622 | && htab->elf.dynsym->contents != NULL) | |
4623 | { | |
4624 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
07d6d2b8 | 4625 | dynamic symbols. */ |
d9e3b590 | 4626 | unsigned long r_symndx = htab->r_sym (rela->r_info); |
897463b1 L |
4627 | if (r_symndx != STN_UNDEF) |
4628 | { | |
4629 | Elf_Internal_Sym sym; | |
4630 | if (!bed->s->swap_symbol_in (abfd, | |
4631 | (htab->elf.dynsym->contents | |
4632 | + r_symndx * bed->s->sizeof_sym), | |
4633 | 0, &sym)) | |
4634 | abort (); | |
d9e3b590 | 4635 | |
897463b1 L |
4636 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
4637 | return reloc_class_ifunc; | |
4638 | } | |
d9e3b590 | 4639 | } |
cae1fbbb | 4640 | |
351f65ca | 4641 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 | 4642 | { |
c428ce9d L |
4643 | case R_X86_64_IRELATIVE: |
4644 | return reloc_class_ifunc; | |
c434dee6 | 4645 | case R_X86_64_RELATIVE: |
1da80baa | 4646 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
4647 | return reloc_class_relative; |
4648 | case R_X86_64_JUMP_SLOT: | |
4649 | return reloc_class_plt; | |
4650 | case R_X86_64_COPY: | |
4651 | return reloc_class_copy; | |
4652 | default: | |
4653 | return reloc_class_normal; | |
4654 | } | |
4655 | } | |
4656 | ||
70256ad8 AJ |
4657 | /* Finish up the dynamic sections. */ |
4658 | ||
0a1b45a2 | 4659 | static bool |
351f65ca L |
4660 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
4661 | struct bfd_link_info *info) | |
70256ad8 | 4662 | { |
0afcef53 | 4663 | struct elf_x86_link_hash_table *htab; |
70256ad8 | 4664 | |
9577f60b | 4665 | htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info); |
4dfe6ac6 | 4666 | if (htab == NULL) |
0a1b45a2 | 4667 | return false; |
4dfe6ac6 | 4668 | |
9577f60b | 4669 | if (! htab->elf.dynamic_sections_created) |
0a1b45a2 | 4670 | return true; |
70256ad8 | 4671 | |
9577f60b | 4672 | if (htab->elf.splt && htab->elf.splt->size > 0) |
e41b3a13 | 4673 | { |
9577f60b L |
4674 | elf_section_data (htab->elf.splt->output_section) |
4675 | ->this_hdr.sh_entsize = htab->plt.plt_entry_size; | |
e41b3a13 | 4676 | |
9577f60b | 4677 | if (htab->plt.has_plt0) |
fff53dae | 4678 | { |
9577f60b L |
4679 | /* Fill in the special first entry in the procedure linkage |
4680 | table. */ | |
4681 | memcpy (htab->elf.splt->contents, | |
4682 | htab->lazy_plt->plt0_entry, | |
4683 | htab->lazy_plt->plt0_entry_size); | |
4684 | /* Add offset for pushq GOT+8(%rip), since the instruction | |
4685 | uses 6 bytes subtract this value. */ | |
4686 | bfd_put_32 (output_bfd, | |
4687 | (htab->elf.sgotplt->output_section->vma | |
4688 | + htab->elf.sgotplt->output_offset | |
4689 | + 8 | |
4690 | - htab->elf.splt->output_section->vma | |
4691 | - htab->elf.splt->output_offset | |
4692 | - 6), | |
4693 | (htab->elf.splt->contents | |
4694 | + htab->lazy_plt->plt0_got1_offset)); | |
4695 | /* Add offset for the PC-relative instruction accessing | |
4696 | GOT+16, subtracting the offset to the end of that | |
4697 | instruction. */ | |
4698 | bfd_put_32 (output_bfd, | |
4699 | (htab->elf.sgotplt->output_section->vma | |
4700 | + htab->elf.sgotplt->output_offset | |
4701 | + 16 | |
4702 | - htab->elf.splt->output_section->vma | |
4703 | - htab->elf.splt->output_offset | |
4704 | - htab->lazy_plt->plt0_got2_insn_end), | |
4705 | (htab->elf.splt->contents | |
4706 | + htab->lazy_plt->plt0_got2_offset)); | |
fff53dae | 4707 | } |
fff53dae | 4708 | |
9bcc30e4 | 4709 | if (htab->elf.tlsdesc_plt) |
8361ed4d | 4710 | { |
9577f60b | 4711 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
9bcc30e4 | 4712 | htab->elf.sgot->contents + htab->elf.tlsdesc_got); |
9577f60b | 4713 | |
9bcc30e4 | 4714 | memcpy (htab->elf.splt->contents + htab->elf.tlsdesc_plt, |
92e68c1d L |
4715 | htab->lazy_plt->plt_tlsdesc_entry, |
4716 | htab->lazy_plt->plt_tlsdesc_entry_size); | |
9577f60b | 4717 | |
bf54968b L |
4718 | /* Add offset for pushq GOT+8(%rip), since ENDBR64 uses 4 |
4719 | bytes and the instruction uses 6 bytes, subtract these | |
4720 | values. */ | |
9577f60b L |
4721 | bfd_put_32 (output_bfd, |
4722 | (htab->elf.sgotplt->output_section->vma | |
4723 | + htab->elf.sgotplt->output_offset | |
4724 | + 8 | |
4725 | - htab->elf.splt->output_section->vma | |
4726 | - htab->elf.splt->output_offset | |
9bcc30e4 | 4727 | - htab->elf.tlsdesc_plt |
92e68c1d | 4728 | - htab->lazy_plt->plt_tlsdesc_got1_insn_end), |
9577f60b | 4729 | (htab->elf.splt->contents |
9bcc30e4 | 4730 | + htab->elf.tlsdesc_plt |
92e68c1d | 4731 | + htab->lazy_plt->plt_tlsdesc_got1_offset)); |
bf54968b L |
4732 | /* Add offset for indirect branch via GOT+TDG, where TDG |
4733 | stands for htab->tlsdesc_got, subtracting the offset | |
4734 | to the end of that instruction. */ | |
9577f60b L |
4735 | bfd_put_32 (output_bfd, |
4736 | (htab->elf.sgot->output_section->vma | |
4737 | + htab->elf.sgot->output_offset | |
9bcc30e4 | 4738 | + htab->elf.tlsdesc_got |
9577f60b L |
4739 | - htab->elf.splt->output_section->vma |
4740 | - htab->elf.splt->output_offset | |
9bcc30e4 | 4741 | - htab->elf.tlsdesc_plt |
92e68c1d | 4742 | - htab->lazy_plt->plt_tlsdesc_got2_insn_end), |
9577f60b | 4743 | (htab->elf.splt->contents |
9bcc30e4 | 4744 | + htab->elf.tlsdesc_plt |
92e68c1d | 4745 | + htab->lazy_plt->plt_tlsdesc_got2_offset)); |
8361ed4d L |
4746 | } |
4747 | } | |
4748 | ||
aec6b87e L |
4749 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
4750 | if (bfd_link_pie (info)) | |
4751 | bfd_hash_traverse (&info->hash->table, | |
4752 | elf_x86_64_pie_finish_undefweak_symbol, | |
4753 | info); | |
4754 | ||
0a1b45a2 | 4755 | return true; |
8d88c4ca NC |
4756 | } |
4757 | ||
233cc9c1 L |
4758 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
4759 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
4760 | It has to be done before elf_link_sort_relocs is called so that | |
4761 | dynamic relocations are properly sorted. */ | |
4762 | ||
0a1b45a2 | 4763 | static bool |
233cc9c1 L |
4764 | elf_x86_64_output_arch_local_syms |
4765 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
4766 | struct bfd_link_info *info, | |
4767 | void *flaginfo ATTRIBUTE_UNUSED, | |
4768 | int (*func) (void *, const char *, | |
4769 | Elf_Internal_Sym *, | |
4770 | asection *, | |
4771 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
4772 | { | |
0afcef53 L |
4773 | struct elf_x86_link_hash_table *htab |
4774 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
233cc9c1 | 4775 | if (htab == NULL) |
0a1b45a2 | 4776 | return false; |
233cc9c1 L |
4777 | |
4778 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
4779 | htab_traverse (htab->loc_hash_table, | |
4780 | elf_x86_64_finish_local_dynamic_symbol, | |
4781 | info); | |
4782 | ||
0a1b45a2 | 4783 | return true; |
233cc9c1 L |
4784 | } |
4785 | ||
38b12349 L |
4786 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all |
4787 | dynamic relocations. */ | |
4788 | ||
4789 | static long | |
4790 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
4791 | long symcount ATTRIBUTE_UNUSED, | |
4792 | asymbol **syms ATTRIBUTE_UNUSED, | |
4793 | long dynsymcount, | |
4794 | asymbol **dynsyms, | |
4795 | asymbol **ret) | |
4796 | { | |
f493882d | 4797 | long count, i, n; |
38b12349 | 4798 | int j; |
38b12349 | 4799 | bfd_byte *plt_contents; |
f493882d | 4800 | long relsize; |
765e526c L |
4801 | const struct elf_x86_lazy_plt_layout *lazy_plt; |
4802 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
4803 | const struct elf_x86_lazy_plt_layout *lazy_bnd_plt; | |
4804 | const struct elf_x86_non_lazy_plt_layout *non_lazy_bnd_plt; | |
4805 | const struct elf_x86_lazy_plt_layout *lazy_ibt_plt; | |
4806 | const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt; | |
38b12349 | 4807 | asection *plt; |
f493882d L |
4808 | enum elf_x86_plt_type plt_type; |
4809 | struct elf_x86_plt plts[] = | |
144bed8d | 4810 | { |
38b12349 L |
4811 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
4812 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
f2c29a16 L |
4813 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, |
4814 | { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
dd9e66ee | 4815 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } |
38b12349 | 4816 | }; |
144bed8d | 4817 | |
38b12349 | 4818 | *ret = NULL; |
144bed8d | 4819 | |
38b12349 L |
4820 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
4821 | return 0; | |
144bed8d | 4822 | |
38b12349 L |
4823 | if (dynsymcount <= 0) |
4824 | return 0; | |
cca5b8b6 | 4825 | |
38b12349 L |
4826 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
4827 | if (relsize <= 0) | |
4828 | return -1; | |
4829 | ||
bbd19b19 L |
4830 | lazy_plt = &elf_x86_64_lazy_plt; |
4831 | non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
4832 | lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt; | |
4833 | non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt; | |
4834 | if (ABI_64_P (abfd)) | |
144bed8d | 4835 | { |
bbd19b19 L |
4836 | lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; |
4837 | non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
38b12349 L |
4838 | } |
4839 | else | |
4840 | { | |
bbd19b19 L |
4841 | lazy_ibt_plt = &elf_x32_lazy_ibt_plt; |
4842 | non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
38b12349 | 4843 | } |
144bed8d | 4844 | |
38b12349 L |
4845 | count = 0; |
4846 | for (j = 0; plts[j].name != NULL; j++) | |
4847 | { | |
4848 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
90efb642 | 4849 | if (plt == NULL || plt->size == 0) |
6f25f223 | 4850 | continue; |
533d0af0 | 4851 | |
38b12349 | 4852 | /* Get the PLT section contents. */ |
b5f386d5 | 4853 | if (!bfd_malloc_and_get_section (abfd, plt, &plt_contents)) |
38b12349 | 4854 | break; |
144bed8d | 4855 | |
38b12349 L |
4856 | /* Check what kind of PLT it is. */ |
4857 | plt_type = plt_unknown; | |
90efb642 L |
4858 | if (plts[j].type == plt_unknown |
4859 | && (plt->size >= (lazy_plt->plt_entry_size | |
4860 | + lazy_plt->plt_entry_size))) | |
144bed8d | 4861 | { |
38b12349 L |
4862 | /* Match lazy PLT first. Need to check the first two |
4863 | instructions. */ | |
4864 | if ((memcmp (plt_contents, lazy_plt->plt0_entry, | |
4865 | lazy_plt->plt0_got1_offset) == 0) | |
4866 | && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6, | |
4867 | 2) == 0)) | |
4868 | plt_type = plt_lazy; | |
4869 | else if (lazy_bnd_plt != NULL | |
4870 | && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry, | |
4871 | lazy_bnd_plt->plt0_got1_offset) == 0) | |
4872 | && (memcmp (plt_contents + 6, | |
4873 | lazy_bnd_plt->plt0_entry + 6, 3) == 0)) | |
ec1f73bb | 4874 | { |
f2c29a16 | 4875 | plt_type = plt_lazy | plt_second; |
ee2fdd6f L |
4876 | /* The fist entry in the lazy IBT PLT is the same as the |
4877 | lazy BND PLT. */ | |
4878 | if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size, | |
4879 | lazy_ibt_plt->plt_entry, | |
4880 | lazy_ibt_plt->plt_got_offset) == 0)) | |
4881 | lazy_plt = lazy_ibt_plt; | |
4882 | else | |
4883 | lazy_plt = lazy_bnd_plt; | |
ec1f73bb | 4884 | } |
144bed8d | 4885 | } |
fca6ae69 | 4886 | |
38b12349 | 4887 | if (non_lazy_plt != NULL |
90efb642 L |
4888 | && (plt_type == plt_unknown || plt_type == plt_non_lazy) |
4889 | && plt->size >= non_lazy_plt->plt_entry_size) | |
38b12349 L |
4890 | { |
4891 | /* Match non-lazy PLT. */ | |
4892 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
4893 | non_lazy_plt->plt_got_offset) == 0) | |
4894 | plt_type = plt_non_lazy; | |
4895 | } | |
4896 | ||
ee2fdd6f | 4897 | if (plt_type == plt_unknown || plt_type == plt_second) |
38b12349 | 4898 | { |
ee2fdd6f | 4899 | if (non_lazy_bnd_plt != NULL |
90efb642 | 4900 | && plt->size >= non_lazy_bnd_plt->plt_entry_size |
ee2fdd6f L |
4901 | && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry, |
4902 | non_lazy_bnd_plt->plt_got_offset) == 0)) | |
38b12349 | 4903 | { |
ee2fdd6f | 4904 | /* Match BND PLT. */ |
f2c29a16 | 4905 | plt_type = plt_second; |
38b12349 L |
4906 | non_lazy_plt = non_lazy_bnd_plt; |
4907 | } | |
ee2fdd6f | 4908 | else if (non_lazy_ibt_plt != NULL |
90efb642 | 4909 | && plt->size >= non_lazy_ibt_plt->plt_entry_size |
ee2fdd6f L |
4910 | && (memcmp (plt_contents, |
4911 | non_lazy_ibt_plt->plt_entry, | |
4912 | non_lazy_ibt_plt->plt_got_offset) == 0)) | |
4913 | { | |
4914 | /* Match IBT PLT. */ | |
4915 | plt_type = plt_second; | |
4916 | non_lazy_plt = non_lazy_ibt_plt; | |
4917 | } | |
38b12349 L |
4918 | } |
4919 | ||
4920 | if (plt_type == plt_unknown) | |
37c0b6ee L |
4921 | { |
4922 | free (plt_contents); | |
4923 | continue; | |
4924 | } | |
38b12349 L |
4925 | |
4926 | plts[j].sec = plt; | |
4927 | plts[j].type = plt_type; | |
4928 | ||
4929 | if ((plt_type & plt_lazy)) | |
4930 | { | |
4931 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
4932 | plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size; | |
4933 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
4934 | /* Skip PLT0 in lazy PLT. */ | |
4935 | i = 1; | |
4936 | } | |
4937 | else | |
4938 | { | |
4939 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
4940 | plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size; | |
4941 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
4942 | i = 0; | |
4943 | } | |
4944 | ||
f2c29a16 L |
4945 | /* Skip lazy PLT when the second PLT is used. */ |
4946 | if (plt_type == (plt_lazy | plt_second)) | |
38b12349 L |
4947 | plts[j].count = 0; |
4948 | else | |
4949 | { | |
4950 | n = plt->size / plts[j].plt_entry_size; | |
4951 | plts[j].count = n; | |
4952 | count += n - i; | |
4953 | } | |
4954 | ||
4955 | plts[j].contents = plt_contents; | |
144bed8d L |
4956 | } |
4957 | ||
f493882d L |
4958 | return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize, |
4959 | (bfd_vma) 0, plts, dynsyms, | |
4960 | ret); | |
0ff2b86e L |
4961 | } |
4962 | ||
d2b2c203 DJ |
4963 | /* Handle an x86-64 specific section when reading an object file. This |
4964 | is called when elfcode.h finds a section with an unknown type. */ | |
4965 | ||
0a1b45a2 | 4966 | static bool |
0c723101 L |
4967 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
4968 | const char *name, int shindex) | |
d2b2c203 DJ |
4969 | { |
4970 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
0a1b45a2 | 4971 | return false; |
d2b2c203 | 4972 | |
6dc132d9 | 4973 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
0a1b45a2 | 4974 | return false; |
d2b2c203 | 4975 | |
0a1b45a2 | 4976 | return true; |
d2b2c203 DJ |
4977 | } |
4978 | ||
3b22753a L |
4979 | /* Hook called by the linker routine which adds symbols from an object |
4980 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
4981 | of .bss. */ | |
4982 | ||
0a1b45a2 | 4983 | static bool |
351f65ca | 4984 | elf_x86_64_add_symbol_hook (bfd *abfd, |
a43942db | 4985 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
351f65ca L |
4986 | Elf_Internal_Sym *sym, |
4987 | const char **namep ATTRIBUTE_UNUSED, | |
4988 | flagword *flagsp ATTRIBUTE_UNUSED, | |
4989 | asection **secp, | |
4990 | bfd_vma *valp) | |
3b22753a L |
4991 | { |
4992 | asection *lcomm; | |
4993 | ||
4994 | switch (sym->st_shndx) | |
4995 | { | |
4996 | case SHN_X86_64_LCOMMON: | |
4997 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
4998 | if (lcomm == NULL) | |
4999 | { | |
5000 | lcomm = bfd_make_section_with_flags (abfd, | |
5001 | "LARGE_COMMON", | |
5002 | (SEC_ALLOC | |
5003 | | SEC_IS_COMMON | |
5004 | | SEC_LINKER_CREATED)); | |
5005 | if (lcomm == NULL) | |
0a1b45a2 | 5006 | return false; |
3b22753a L |
5007 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; |
5008 | } | |
5009 | *secp = lcomm; | |
5010 | *valp = sym->st_size; | |
0a1b45a2 | 5011 | return true; |
3b22753a | 5012 | } |
d8045f23 | 5013 | |
0a1b45a2 | 5014 | return true; |
3b22753a L |
5015 | } |
5016 | ||
5017 | ||
5018 | /* Given a BFD section, try to locate the corresponding ELF section | |
5019 | index. */ | |
5020 | ||
0a1b45a2 | 5021 | static bool |
351f65ca L |
5022 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
5023 | asection *sec, int *index_return) | |
3b22753a L |
5024 | { |
5025 | if (sec == &_bfd_elf_large_com_section) | |
5026 | { | |
91d6fa6a | 5027 | *index_return = SHN_X86_64_LCOMMON; |
0a1b45a2 | 5028 | return true; |
3b22753a | 5029 | } |
0a1b45a2 | 5030 | return false; |
3b22753a L |
5031 | } |
5032 | ||
5033 | /* Process a symbol. */ | |
5034 | ||
5035 | static void | |
351f65ca L |
5036 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
5037 | asymbol *asym) | |
3b22753a L |
5038 | { |
5039 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
5040 | ||
5041 | switch (elfsym->internal_elf_sym.st_shndx) | |
5042 | { | |
5043 | case SHN_X86_64_LCOMMON: | |
5044 | asym->section = &_bfd_elf_large_com_section; | |
5045 | asym->value = elfsym->internal_elf_sym.st_size; | |
5046 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
5047 | asym->flags &= ~BSF_GLOBAL; | |
5048 | break; | |
5049 | } | |
5050 | } | |
5051 | ||
0a1b45a2 | 5052 | static bool |
351f65ca | 5053 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
5054 | { |
5055 | return (sym->st_shndx == SHN_COMMON | |
5056 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
5057 | } | |
5058 | ||
5059 | static unsigned int | |
351f65ca | 5060 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
5061 | { |
5062 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
5063 | return SHN_COMMON; | |
5064 | else | |
5065 | return SHN_X86_64_LCOMMON; | |
5066 | } | |
5067 | ||
5068 | static asection * | |
351f65ca | 5069 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
5070 | { |
5071 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
5072 | return bfd_com_section_ptr; | |
5073 | else | |
5074 | return &_bfd_elf_large_com_section; | |
5075 | } | |
5076 | ||
0a1b45a2 | 5077 | static bool |
5d13b3b3 AM |
5078 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
5079 | const Elf_Internal_Sym *sym, | |
351f65ca | 5080 | asection **psec, |
0a1b45a2 AM |
5081 | bool newdef, |
5082 | bool olddef, | |
351f65ca | 5083 | bfd *oldbfd, |
5d13b3b3 | 5084 | const asection *oldsec) |
3b22753a L |
5085 | { |
5086 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
5087 | normal common symbol. We turn the large common symbol into a |
5088 | normal one. */ | |
5d13b3b3 | 5089 | if (!olddef |
3b22753a | 5090 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
5091 | && !newdef |
5092 | && bfd_is_com_section (*psec) | |
5093 | && oldsec != *psec) | |
3b22753a | 5094 | { |
00492999 | 5095 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 5096 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
5097 | { |
5098 | h->root.u.c.p->section | |
5099 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
5100 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
5101 | } | |
5102 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
5103 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
5104 | *psec = bfd_com_section_ptr; | |
3b22753a L |
5105 | } |
5106 | ||
0a1b45a2 | 5107 | return true; |
3b22753a L |
5108 | } |
5109 | ||
5110 | static int | |
351f65ca L |
5111 | elf_x86_64_additional_program_headers (bfd *abfd, |
5112 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
5113 | { |
5114 | asection *s; | |
9a2e389a | 5115 | int count = 0; |
3b22753a L |
5116 | |
5117 | /* Check to see if we need a large readonly segment. */ | |
5118 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
5119 | if (s && (s->flags & SEC_LOAD)) | |
5120 | count++; | |
5121 | ||
5122 | /* Check to see if we need a large data segment. Since .lbss sections | |
5123 | is placed right after the .bss section, there should be no need for | |
5124 | a large data segment just because of .lbss. */ | |
5125 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
5126 | if (s && (s->flags & SEC_LOAD)) | |
5127 | count++; | |
5128 | ||
5129 | return count; | |
5130 | } | |
5131 | ||
c543bf9a L |
5132 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
5133 | ||
0a1b45a2 | 5134 | static bool |
c543bf9a L |
5135 | elf_x86_64_relocs_compatible (const bfd_target *input, |
5136 | const bfd_target *output) | |
5137 | { | |
5138 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
5139 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
5140 | && _bfd_elf_relocs_compatible (input, output)); | |
5141 | } | |
5142 | ||
38b12349 L |
5143 | /* Set up x86-64 GNU properties. Return the first relocatable ELF input |
5144 | with GNU properties if found. Otherwise, return NULL. */ | |
5145 | ||
5146 | static bfd * | |
5147 | elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info) | |
5148 | { | |
1de031c8 | 5149 | struct elf_x86_init_table init_table; |
bbd19b19 L |
5150 | const struct elf_backend_data *bed; |
5151 | struct elf_x86_link_hash_table *htab; | |
ee2fdd6f | 5152 | |
78984959 L |
5153 | if ((int) R_X86_64_standard >= (int) R_X86_64_converted_reloc_bit |
5154 | || (int) R_X86_64_max <= (int) R_X86_64_converted_reloc_bit | |
5155 | || ((int) (R_X86_64_GNU_VTINHERIT | R_X86_64_converted_reloc_bit) | |
5156 | != (int) R_X86_64_GNU_VTINHERIT) | |
5157 | || ((int) (R_X86_64_GNU_VTENTRY | R_X86_64_converted_reloc_bit) | |
5158 | != (int) R_X86_64_GNU_VTENTRY)) | |
5159 | abort (); | |
5160 | ||
851b6fa1 L |
5161 | /* This is unused for x86-64. */ |
5162 | init_table.plt0_pad_byte = 0x90; | |
5163 | ||
bbd19b19 L |
5164 | bed = get_elf_backend_data (info->output_bfd); |
5165 | htab = elf_x86_hash_table (info, bed->target_id); | |
5166 | if (!htab) | |
5167 | abort (); | |
5168 | if (htab->params->bndplt) | |
73784fa5 | 5169 | { |
bbd19b19 L |
5170 | init_table.lazy_plt = &elf_x86_64_lazy_bnd_plt; |
5171 | init_table.non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt; | |
5172 | } | |
5173 | else | |
5174 | { | |
5175 | init_table.lazy_plt = &elf_x86_64_lazy_plt; | |
5176 | init_table.non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
5177 | } | |
38b12349 | 5178 | |
bbd19b19 L |
5179 | if (ABI_64_P (info->output_bfd)) |
5180 | { | |
5181 | init_table.lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; | |
5182 | init_table.non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
38b12349 L |
5183 | } |
5184 | else | |
5185 | { | |
bbd19b19 L |
5186 | init_table.lazy_ibt_plt = &elf_x32_lazy_ibt_plt; |
5187 | init_table.non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
38b12349 L |
5188 | } |
5189 | ||
7a382c1c L |
5190 | if (ABI_64_P (info->output_bfd)) |
5191 | { | |
1de031c8 L |
5192 | init_table.r_info = elf64_r_info; |
5193 | init_table.r_sym = elf64_r_sym; | |
7a382c1c L |
5194 | } |
5195 | else | |
5196 | { | |
1de031c8 L |
5197 | init_table.r_info = elf32_r_info; |
5198 | init_table.r_sym = elf32_r_sym; | |
7a382c1c L |
5199 | } |
5200 | ||
1de031c8 | 5201 | return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table); |
38b12349 L |
5202 | } |
5203 | ||
9a2e389a | 5204 | static const struct bfd_elf_special_section |
46bed679 | 5205 | elf_x86_64_special_sections[]= |
3b22753a | 5206 | { |
0112cd26 NC |
5207 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
5208 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
5209 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
07d6d2b8 | 5210 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
0112cd26 NC |
5211 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
5212 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
07d6d2b8 | 5213 | { NULL, 0, 0, 0, 0 } |
3b22753a L |
5214 | }; |
5215 | ||
6d00b590 | 5216 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
5217 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
5218 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 5219 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 5220 | #define ELF_MACHINE_CODE EM_X86_64 |
f6aec96d L |
5221 | #if DEFAULT_LD_Z_SEPARATE_CODE |
5222 | # define ELF_MAXPAGESIZE 0x1000 | |
5223 | #else | |
5224 | # define ELF_MAXPAGESIZE 0x200000 | |
5225 | #endif | |
2043964e | 5226 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 5227 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
5228 | |
5229 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 5230 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
5231 | #define elf_backend_want_got_plt 1 |
5232 | #define elf_backend_plt_readonly 1 | |
5233 | #define elf_backend_want_plt_sym 0 | |
5234 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 5235 | #define elf_backend_rela_normal 1 |
07d6d2b8 | 5236 | #define elf_backend_plt_alignment 4 |
f7483970 | 5237 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 5238 | #define elf_backend_caches_rawsize 1 |
64f52338 | 5239 | #define elf_backend_dtrel_excludes_plt 1 |
5474d94f | 5240 | #define elf_backend_want_dynrelro 1 |
70256ad8 | 5241 | |
351f65ca | 5242 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 5243 | |
351f65ca | 5244 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 5245 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 5246 | elf_x86_64_reloc_name_lookup |
70256ad8 | 5247 | |
c543bf9a | 5248 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca | 5249 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
38b12349 | 5250 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
351f65ca L |
5251 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections |
5252 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
233cc9c1 | 5253 | #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms |
351f65ca L |
5254 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus |
5255 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
5256 | #ifdef CORE_HEADER |
5257 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
5258 | #endif | |
351f65ca L |
5259 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
5260 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
74541ad4 | 5261 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 5262 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
0ff2b86e | 5263 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 5264 | |
d2b2c203 | 5265 | #define elf_backend_section_from_shdr \ |
351f65ca | 5266 | elf_x86_64_section_from_shdr |
d2b2c203 | 5267 | |
3b22753a | 5268 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 5269 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 5270 | #define elf_backend_add_symbol_hook \ |
351f65ca | 5271 | elf_x86_64_add_symbol_hook |
3b22753a | 5272 | #define elf_backend_symbol_processing \ |
351f65ca | 5273 | elf_x86_64_symbol_processing |
3b22753a | 5274 | #define elf_backend_common_section_index \ |
351f65ca | 5275 | elf_x86_64_common_section_index |
3b22753a | 5276 | #define elf_backend_common_section \ |
351f65ca | 5277 | elf_x86_64_common_section |
3b22753a | 5278 | #define elf_backend_common_definition \ |
351f65ca | 5279 | elf_x86_64_common_definition |
3b22753a | 5280 | #define elf_backend_merge_symbol \ |
351f65ca | 5281 | elf_x86_64_merge_symbol |
3b22753a | 5282 | #define elf_backend_special_sections \ |
351f65ca | 5283 | elf_x86_64_special_sections |
3b22753a | 5284 | #define elf_backend_additional_program_headers \ |
351f65ca | 5285 | elf_x86_64_additional_program_headers |
38b12349 | 5286 | #define elf_backend_setup_gnu_properties \ |
9f857535 L |
5287 | elf_x86_64_link_setup_gnu_properties |
5288 | #define elf_backend_hide_symbol \ | |
5289 | _bfd_x86_elf_hide_symbol | |
3b22753a | 5290 | |
8f56f7a2 L |
5291 | #undef elf64_bed |
5292 | #define elf64_bed elf64_x86_64_bed | |
5293 | ||
8d88c4ca | 5294 | #include "elf64-target.h" |
9d7cbccd | 5295 | |
6036f486 ES |
5296 | /* CloudABI support. */ |
5297 | ||
07d6d2b8 | 5298 | #undef TARGET_LITTLE_SYM |
6036f486 | 5299 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec |
07d6d2b8 | 5300 | #undef TARGET_LITTLE_NAME |
6036f486 ES |
5301 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" |
5302 | ||
5303 | #undef ELF_OSABI | |
5304 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
5305 | ||
07d6d2b8 | 5306 | #undef elf64_bed |
6036f486 ES |
5307 | #define elf64_bed elf64_x86_64_cloudabi_bed |
5308 | ||
5309 | #include "elf64-target.h" | |
5310 | ||
9d7cbccd NC |
5311 | /* FreeBSD support. */ |
5312 | ||
07d6d2b8 | 5313 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5314 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
07d6d2b8 | 5315 | #undef TARGET_LITTLE_NAME |
9d7cbccd NC |
5316 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" |
5317 | ||
d1036acb L |
5318 | #undef ELF_OSABI |
5319 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 5320 | |
07d6d2b8 | 5321 | #undef elf64_bed |
9d7cbccd NC |
5322 | #define elf64_bed elf64_x86_64_fbsd_bed |
5323 | ||
5324 | #include "elf64-target.h" | |
8a9036a4 | 5325 | |
a6cc6b3b RO |
5326 | /* Solaris 2 support. */ |
5327 | ||
5328 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5329 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
5330 | #undef TARGET_LITTLE_NAME |
5331 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
5332 | ||
90c14f0c L |
5333 | #undef ELF_TARGET_OS |
5334 | #define ELF_TARGET_OS is_solaris | |
3b4c3844 | 5335 | |
a6cc6b3b RO |
5336 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE |
5337 | objects won't be recognized. */ | |
5338 | #undef ELF_OSABI | |
5339 | ||
5340 | #undef elf64_bed | |
5341 | #define elf64_bed elf64_x86_64_sol2_bed | |
5342 | ||
7dc98aea RO |
5343 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
5344 | boundary. */ | |
84865015 | 5345 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
5346 | #define elf_backend_static_tls_alignment 16 |
5347 | ||
a6cc6b3b RO |
5348 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
5349 | ||
5350 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
5351 | File, p.63. */ | |
84865015 | 5352 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
5353 | #define elf_backend_want_plt_sym 1 |
5354 | ||
84865015 NC |
5355 | #undef elf_backend_strtab_flags |
5356 | #define elf_backend_strtab_flags SHF_STRINGS | |
5357 | ||
0a1b45a2 | 5358 | static bool |
5522f910 NC |
5359 | elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
5360 | bfd *obfd ATTRIBUTE_UNUSED, | |
5361 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
5362 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
5363 | { |
5364 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
5365 | and sh_link fields of Solaris specific section types. */ | |
0a1b45a2 | 5366 | return false; |
84865015 NC |
5367 | } |
5368 | ||
5522f910 NC |
5369 | #undef elf_backend_copy_special_section_fields |
5370 | #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields | |
84865015 | 5371 | |
a6cc6b3b RO |
5372 | #include "elf64-target.h" |
5373 | ||
8059fb19 RM |
5374 | /* Restore defaults. */ |
5375 | #undef ELF_OSABI | |
5376 | #undef elf_backend_static_tls_alignment | |
5377 | #undef elf_backend_want_plt_sym | |
5378 | #define elf_backend_want_plt_sym 0 | |
84865015 | 5379 | #undef elf_backend_strtab_flags |
5522f910 | 5380 | #undef elf_backend_copy_special_section_fields |
8059fb19 | 5381 | |
8a9036a4 L |
5382 | /* Intel L1OM support. */ |
5383 | ||
0a1b45a2 | 5384 | static bool |
8a9036a4 L |
5385 | elf64_l1om_elf_object_p (bfd *abfd) |
5386 | { | |
5387 | /* Set the right machine number for an L1OM elf64 file. */ | |
5388 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
0a1b45a2 | 5389 | return true; |
8a9036a4 L |
5390 | } |
5391 | ||
5392 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5393 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
5394 | #undef TARGET_LITTLE_NAME |
5395 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
5396 | #undef ELF_ARCH | |
5397 | #define ELF_ARCH bfd_arch_l1om | |
5398 | ||
5399 | #undef ELF_MACHINE_CODE | |
5400 | #define ELF_MACHINE_CODE EM_L1OM | |
5401 | ||
5402 | #undef ELF_OSABI | |
5403 | ||
5404 | #undef elf64_bed | |
5405 | #define elf64_bed elf64_l1om_bed | |
5406 | ||
5407 | #undef elf_backend_object_p | |
5408 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
5409 | ||
8059fb19 RM |
5410 | /* Restore defaults. */ |
5411 | #undef ELF_MAXPAGESIZE | |
5412 | #undef ELF_MINPAGESIZE | |
5413 | #undef ELF_COMMONPAGESIZE | |
f6aec96d L |
5414 | #if DEFAULT_LD_Z_SEPARATE_CODE |
5415 | # define ELF_MAXPAGESIZE 0x1000 | |
5416 | #else | |
5417 | # define ELF_MAXPAGESIZE 0x200000 | |
5418 | #endif | |
8059fb19 RM |
5419 | #define ELF_MINPAGESIZE 0x1000 |
5420 | #define ELF_COMMONPAGESIZE 0x1000 | |
5421 | #undef elf_backend_plt_alignment | |
5422 | #define elf_backend_plt_alignment 4 | |
90c14f0c | 5423 | #undef ELF_TARGET_OS |
1a0c107f | 5424 | |
8a9036a4 L |
5425 | #include "elf64-target.h" |
5426 | ||
5427 | /* FreeBSD L1OM support. */ | |
5428 | ||
5429 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5430 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
5431 | #undef TARGET_LITTLE_NAME |
5432 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
5433 | ||
5434 | #undef ELF_OSABI | |
5435 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5436 | ||
5437 | #undef elf64_bed | |
5438 | #define elf64_bed elf64_l1om_fbsd_bed | |
5439 | ||
8a9036a4 | 5440 | #include "elf64-target.h" |
351f65ca | 5441 | |
7a9068fe L |
5442 | /* Intel K1OM support. */ |
5443 | ||
0a1b45a2 | 5444 | static bool |
7a9068fe L |
5445 | elf64_k1om_elf_object_p (bfd *abfd) |
5446 | { | |
5447 | /* Set the right machine number for an K1OM elf64 file. */ | |
5448 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
0a1b45a2 | 5449 | return true; |
7a9068fe L |
5450 | } |
5451 | ||
5452 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5453 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
5454 | #undef TARGET_LITTLE_NAME |
5455 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
5456 | #undef ELF_ARCH | |
5457 | #define ELF_ARCH bfd_arch_k1om | |
5458 | ||
5459 | #undef ELF_MACHINE_CODE | |
5460 | #define ELF_MACHINE_CODE EM_K1OM | |
5461 | ||
5462 | #undef ELF_OSABI | |
5463 | ||
5464 | #undef elf64_bed | |
5465 | #define elf64_bed elf64_k1om_bed | |
5466 | ||
5467 | #undef elf_backend_object_p | |
5468 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
5469 | ||
7a9068fe L |
5470 | #include "elf64-target.h" |
5471 | ||
5472 | /* FreeBSD K1OM support. */ | |
5473 | ||
5474 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5475 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
5476 | #undef TARGET_LITTLE_NAME |
5477 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
5478 | ||
5479 | #undef ELF_OSABI | |
5480 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5481 | ||
5482 | #undef elf64_bed | |
5483 | #define elf64_bed elf64_k1om_fbsd_bed | |
5484 | ||
5485 | #include "elf64-target.h" | |
5486 | ||
351f65ca L |
5487 | /* 32bit x86-64 support. */ |
5488 | ||
351f65ca | 5489 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5490 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
5491 | #undef TARGET_LITTLE_NAME |
5492 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 5493 | #undef elf32_bed |
bbd19b19 | 5494 | #define elf32_bed elf32_x86_64_bed |
351f65ca L |
5495 | |
5496 | #undef ELF_ARCH | |
5497 | #define ELF_ARCH bfd_arch_i386 | |
5498 | ||
5499 | #undef ELF_MACHINE_CODE | |
5500 | #define ELF_MACHINE_CODE EM_X86_64 | |
5501 | ||
351f65ca L |
5502 | #undef ELF_OSABI |
5503 | ||
bbd19b19 L |
5504 | #define bfd_elf32_bfd_reloc_type_lookup \ |
5505 | elf_x86_64_reloc_type_lookup | |
5506 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
5507 | elf_x86_64_reloc_name_lookup | |
5508 | #define bfd_elf32_get_synthetic_symtab \ | |
5509 | elf_x86_64_get_synthetic_symtab | |
5510 | ||
351f65ca L |
5511 | #undef elf_backend_object_p |
5512 | #define elf_backend_object_p \ | |
5513 | elf32_x86_64_elf_object_p | |
5514 | ||
5515 | #undef elf_backend_bfd_from_remote_memory | |
5516 | #define elf_backend_bfd_from_remote_memory \ | |
5517 | _bfd_elf32_bfd_from_remote_memory | |
5518 | ||
5519 | #undef elf_backend_size_info | |
5520 | #define elf_backend_size_info \ | |
5521 | _bfd_elf32_size_info | |
5522 | ||
5523 | #include "elf32-target.h" |