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351f65ca | 1 | /* X86-64 specific support for ELF |
219d1afa | 2 | Copyright (C) 2000-2018 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" |
5a68afcf | 23 | #include "elf-nacl.h" |
e41b3a13 | 24 | #include "dwarf2.h" |
d7921315 | 25 | #include "libiberty.h" |
8d88c4ca | 26 | |
56ceb5b5 | 27 | #include "opcode/i386.h" |
8d88c4ca NC |
28 | #include "elf/x86-64.h" |
29 | ||
8fd79e71 L |
30 | #ifdef CORE_HEADER |
31 | #include <stdarg.h> | |
32 | #include CORE_HEADER | |
33 | #endif | |
34 | ||
8d88c4ca NC |
35 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
36 | #define MINUS_ONE (~ (bfd_vma) 0) | |
37 | ||
351f65ca L |
38 | /* Since both 32-bit and 64-bit x86-64 encode relocation type in the |
39 | identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get | |
40 | relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE | |
41 | since they are the same. */ | |
42 | ||
8d88c4ca | 43 | /* The relocation "howto" table. Order of fields: |
7b81dfbb AJ |
44 | type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow, |
45 | special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */ | |
70256ad8 AJ |
46 | static reloc_howto_type x86_64_elf_howto_table[] = |
47 | { | |
6346d5ca | 48 | HOWTO(R_X86_64_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont, |
b34976b6 AM |
49 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, |
50 | FALSE), | |
51 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
52 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, | |
53 | FALSE), | |
54 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
55 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, | |
56 | TRUE), | |
57 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
58 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, | |
59 | FALSE), | |
60 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
61 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, | |
62 | TRUE), | |
63 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
64 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, | |
65 | FALSE), | |
66 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
67 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, | |
68 | MINUS_ONE, FALSE), | |
69 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
70 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, | |
71 | MINUS_ONE, FALSE), | |
72 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
73 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, | |
74 | MINUS_ONE, FALSE), | |
75 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
76 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, | |
77 | 0xffffffff, TRUE), | |
78 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, | |
79 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
80 | FALSE), | |
81 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
82 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, | |
83 | FALSE), | |
84 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
85 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), | |
b0360d8c | 86 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
b34976b6 | 87 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), |
ac2aa337 | 88 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
b34976b6 AM |
89 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), |
90 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
91 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), | |
92 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
93 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, | |
94 | MINUS_ONE, FALSE), | |
95 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
96 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, | |
97 | MINUS_ONE, FALSE), | |
98 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
99 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, | |
100 | MINUS_ONE, FALSE), | |
101 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
102 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, | |
103 | 0xffffffff, TRUE), | |
104 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
105 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, | |
106 | 0xffffffff, TRUE), | |
ac2aa337 | 107 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
b34976b6 AM |
108 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, |
109 | 0xffffffff, FALSE), | |
110 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
111 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, | |
112 | 0xffffffff, TRUE), | |
113 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
114 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, | |
115 | 0xffffffff, FALSE), | |
d6ab8113 JB |
116 | HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
117 | bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE, | |
118 | TRUE), | |
119 | HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
120 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", | |
121 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
122 | HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
123 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", | |
124 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
7b81dfbb AJ |
125 | HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, |
126 | bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE, | |
127 | FALSE), | |
128 | HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
129 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE, | |
130 | MINUS_ONE, TRUE), | |
131 | HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
132 | bfd_elf_generic_reloc, "R_X86_64_GOTPC64", | |
133 | FALSE, MINUS_ONE, MINUS_ONE, TRUE), | |
134 | HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
135 | bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE, | |
136 | MINUS_ONE, FALSE), | |
137 | HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
138 | bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE, | |
139 | MINUS_ONE, FALSE), | |
1788fc08 L |
140 | HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, |
141 | bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff, | |
142 | FALSE), | |
143 | HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned, | |
144 | bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE, | |
145 | FALSE), | |
67a4f2b7 AO |
146 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0, |
147 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
148 | "R_X86_64_GOTPC32_TLSDESC", | |
149 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
150 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0, | |
151 | complain_overflow_dont, bfd_elf_generic_reloc, | |
152 | "R_X86_64_TLSDESC_CALL", | |
153 | FALSE, 0, 0, FALSE), | |
154 | HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0, | |
155 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
156 | "R_X86_64_TLSDESC", | |
157 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
cbe950e9 L |
158 | HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
159 | bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE, | |
160 | MINUS_ONE, FALSE), | |
64d25c44 L |
161 | HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
162 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE, | |
163 | MINUS_ONE, FALSE), | |
c3320543 L |
164 | HOWTO(R_X86_64_PC32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
165 | bfd_elf_generic_reloc, "R_X86_64_PC32_BND", FALSE, 0xffffffff, 0xffffffff, | |
166 | TRUE), | |
167 | HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
168 | bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", FALSE, 0xffffffff, 0xffffffff, | |
169 | TRUE), | |
56ceb5b5 L |
170 | HOWTO(R_X86_64_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
171 | bfd_elf_generic_reloc, "R_X86_64_GOTPCRELX", FALSE, 0xffffffff, | |
172 | 0xffffffff, TRUE), | |
173 | HOWTO(R_X86_64_REX_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
174 | bfd_elf_generic_reloc, "R_X86_64_REX_GOTPCRELX", FALSE, 0xffffffff, | |
175 | 0xffffffff, TRUE), | |
fe4770f4 | 176 | |
a33d77bc JB |
177 | /* We have a gap in the reloc numbers here. |
178 | R_X86_64_standard counts the number up to this point, and | |
179 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
180 | R_X86_64_GNU_VT* to form an index into this table. */ | |
56ceb5b5 | 181 | #define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1) |
a33d77bc JB |
182 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
183 | ||
fe4770f4 | 184 | /* GNU extension to record C++ vtable hierarchy. */ |
b34976b6 AM |
185 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
186 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
187 | |
188 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
189 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
190 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
d7921315 L |
191 | FALSE), |
192 | ||
193 | /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */ | |
194 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
195 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
196 | FALSE) | |
8d88c4ca NC |
197 | }; |
198 | ||
78984959 L |
199 | /* Set if a relocation is converted from a GOTPCREL relocation. */ |
200 | #define R_X86_64_converted_reloc_bit (1 << 7) | |
201 | ||
daf1c414 | 202 | #define X86_PCREL_TYPE_P(TYPE) \ |
d8045f23 NC |
203 | ( ((TYPE) == R_X86_64_PC8) \ |
204 | || ((TYPE) == R_X86_64_PC16) \ | |
205 | || ((TYPE) == R_X86_64_PC32) \ | |
c3320543 | 206 | || ((TYPE) == R_X86_64_PC32_BND) \ |
d8045f23 NC |
207 | || ((TYPE) == R_X86_64_PC64)) |
208 | ||
aebcc8ff L |
209 | #define X86_SIZE_TYPE_P(TYPE) \ |
210 | ((TYPE) == R_X86_64_SIZE32 || (TYPE) == R_X86_64_SIZE64) | |
211 | ||
8d88c4ca | 212 | /* Map BFD relocs to the x86_64 elf relocs. */ |
70256ad8 AJ |
213 | struct elf_reloc_map |
214 | { | |
8d88c4ca NC |
215 | bfd_reloc_code_real_type bfd_reloc_val; |
216 | unsigned char elf_reloc_val; | |
217 | }; | |
218 | ||
dc810e39 | 219 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 220 | { |
70256ad8 AJ |
221 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
222 | { BFD_RELOC_64, R_X86_64_64, }, | |
223 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
224 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
225 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
226 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
227 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
228 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
229 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
230 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
231 | { BFD_RELOC_32, R_X86_64_32, }, | |
232 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
233 | { BFD_RELOC_16, R_X86_64_16, }, | |
234 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
235 | { BFD_RELOC_8, R_X86_64_8, }, | |
236 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
237 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
238 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
239 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
240 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
241 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
242 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
243 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
244 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
245 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
246 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
247 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
248 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
249 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
250 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
251 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
252 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
1788fc08 L |
253 | { BFD_RELOC_SIZE32, R_X86_64_SIZE32, }, |
254 | { BFD_RELOC_SIZE64, R_X86_64_SIZE64, }, | |
67a4f2b7 AO |
255 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
256 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
257 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
cbe950e9 | 258 | { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, }, |
56ceb5b5 L |
259 | { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND, }, |
260 | { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND, }, | |
261 | { BFD_RELOC_X86_64_GOTPCRELX, R_X86_64_GOTPCRELX, }, | |
262 | { BFD_RELOC_X86_64_REX_GOTPCRELX, R_X86_64_REX_GOTPCRELX, }, | |
fe4770f4 AJ |
263 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
264 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
265 | }; |
266 | ||
67a4f2b7 | 267 | static reloc_howto_type * |
351f65ca | 268 | elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) |
67a4f2b7 AO |
269 | { |
270 | unsigned i; | |
271 | ||
d7921315 L |
272 | if (r_type == (unsigned int) R_X86_64_32) |
273 | { | |
274 | if (ABI_64_P (abfd)) | |
275 | i = r_type; | |
276 | else | |
277 | i = ARRAY_SIZE (x86_64_elf_howto_table) - 1; | |
278 | } | |
279 | else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
280 | || r_type >= (unsigned int) R_X86_64_max) | |
67a4f2b7 AO |
281 | { |
282 | if (r_type >= (unsigned int) R_X86_64_standard) | |
283 | { | |
695344c0 | 284 | /* xgettext:c-format */ |
0aa13fee AM |
285 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
286 | abfd, r_type); | |
f3185997 NC |
287 | bfd_set_error (bfd_error_bad_value); |
288 | return NULL; | |
67a4f2b7 AO |
289 | } |
290 | i = r_type; | |
291 | } | |
292 | else | |
293 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
294 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
295 | return &x86_64_elf_howto_table[i]; | |
296 | } | |
8d88c4ca NC |
297 | |
298 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
299 | static reloc_howto_type * | |
351f65ca L |
300 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
301 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
302 | { |
303 | unsigned int i; | |
27482721 | 304 | |
8d88c4ca NC |
305 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
306 | i++) | |
307 | { | |
308 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
309 | return elf_x86_64_rtype_to_howto (abfd, |
310 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca | 311 | } |
5860e3f8 | 312 | return NULL; |
8d88c4ca NC |
313 | } |
314 | ||
157090f7 | 315 | static reloc_howto_type * |
d7921315 | 316 | elf_x86_64_reloc_name_lookup (bfd *abfd, |
351f65ca | 317 | const char *r_name) |
157090f7 AM |
318 | { |
319 | unsigned int i; | |
320 | ||
d7921315 L |
321 | if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0) |
322 | { | |
323 | /* Get x32 R_X86_64_32. */ | |
324 | reloc_howto_type *reloc | |
325 | = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1]; | |
326 | BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32); | |
327 | return reloc; | |
328 | } | |
329 | ||
330 | for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++) | |
157090f7 AM |
331 | if (x86_64_elf_howto_table[i].name != NULL |
332 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
333 | return &x86_64_elf_howto_table[i]; | |
334 | ||
335 | return NULL; | |
336 | } | |
337 | ||
8d88c4ca | 338 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 339 | |
f3185997 NC |
340 | static bfd_boolean |
341 | elf_x86_64_info_to_howto (bfd *abfd, arelent *cache_ptr, | |
351f65ca | 342 | Elf_Internal_Rela *dst) |
8d88c4ca | 343 | { |
67a4f2b7 | 344 | unsigned r_type; |
8d88c4ca | 345 | |
351f65ca L |
346 | r_type = ELF32_R_TYPE (dst->r_info); |
347 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); | |
f3185997 NC |
348 | if (cache_ptr->howto == NULL) |
349 | return FALSE; | |
262c0a87 | 350 | BFD_ASSERT (r_type == cache_ptr->howto->type || cache_ptr->howto->type == R_X86_64_NONE); |
f3185997 | 351 | return TRUE; |
8d88c4ca | 352 | } |
70256ad8 | 353 | \f |
3bab7989 | 354 | /* Support for core dump NOTE sections. */ |
b34976b6 | 355 | static bfd_boolean |
351f65ca | 356 | elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
357 | { |
358 | int offset; | |
eea6121a | 359 | size_t size; |
3bab7989 ML |
360 | |
361 | switch (note->descsz) | |
362 | { | |
363 | default: | |
b34976b6 | 364 | return FALSE; |
3bab7989 | 365 | |
bcd823f1 L |
366 | case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */ |
367 | /* pr_cursig */ | |
228e534f | 368 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
bcd823f1 L |
369 | |
370 | /* pr_pid */ | |
228e534f | 371 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
bcd823f1 L |
372 | |
373 | /* pr_reg */ | |
374 | offset = 72; | |
375 | size = 216; | |
376 | ||
377 | break; | |
378 | ||
3bab7989 ML |
379 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ |
380 | /* pr_cursig */ | |
228e534f | 381 | elf_tdata (abfd)->core->signal |
3bab7989 ML |
382 | = bfd_get_16 (abfd, note->descdata + 12); |
383 | ||
384 | /* pr_pid */ | |
228e534f | 385 | elf_tdata (abfd)->core->lwpid |
3bab7989 ML |
386 | = bfd_get_32 (abfd, note->descdata + 32); |
387 | ||
388 | /* pr_reg */ | |
389 | offset = 112; | |
eea6121a | 390 | size = 216; |
3bab7989 ML |
391 | |
392 | break; | |
393 | } | |
394 | ||
395 | /* Make a ".reg/999" section. */ | |
396 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 397 | size, note->descpos + offset); |
3bab7989 ML |
398 | } |
399 | ||
b34976b6 | 400 | static bfd_boolean |
351f65ca | 401 | elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
402 | { |
403 | switch (note->descsz) | |
404 | { | |
405 | default: | |
b34976b6 | 406 | return FALSE; |
3bab7989 | 407 | |
bcd823f1 | 408 | case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */ |
228e534f | 409 | elf_tdata (abfd)->core->pid |
bcd823f1 | 410 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 411 | elf_tdata (abfd)->core->program |
bcd823f1 | 412 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 413 | elf_tdata (abfd)->core->command |
bcd823f1 L |
414 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
415 | break; | |
416 | ||
3bab7989 | 417 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ |
228e534f | 418 | elf_tdata (abfd)->core->pid |
261b8d08 | 419 | = bfd_get_32 (abfd, note->descdata + 24); |
228e534f | 420 | elf_tdata (abfd)->core->program |
3bab7989 | 421 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
228e534f | 422 | elf_tdata (abfd)->core->command |
3bab7989 ML |
423 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
424 | } | |
425 | ||
426 | /* Note that for some reason, a spurious space is tacked | |
427 | onto the end of the args in some (at least one anyway) | |
428 | implementations, so strip it off if it exists. */ | |
429 | ||
430 | { | |
228e534f | 431 | char *command = elf_tdata (abfd)->core->command; |
3bab7989 ML |
432 | int n = strlen (command); |
433 | ||
434 | if (0 < n && command[n - 1] == ' ') | |
435 | command[n - 1] = '\0'; | |
436 | } | |
437 | ||
b34976b6 | 438 | return TRUE; |
3bab7989 | 439 | } |
8fd79e71 L |
440 | |
441 | #ifdef CORE_HEADER | |
602f1657 AM |
442 | # if GCC_VERSION >= 8000 |
443 | # pragma GCC diagnostic push | |
444 | # pragma GCC diagnostic ignored "-Wstringop-truncation" | |
445 | # endif | |
8fd79e71 L |
446 | static char * |
447 | elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz, | |
448 | int note_type, ...) | |
449 | { | |
450 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8fd79e71 L |
451 | va_list ap; |
452 | const char *fname, *psargs; | |
453 | long pid; | |
454 | int cursig; | |
455 | const void *gregs; | |
456 | ||
457 | switch (note_type) | |
458 | { | |
459 | default: | |
460 | return NULL; | |
461 | ||
462 | case NT_PRPSINFO: | |
463 | va_start (ap, note_type); | |
464 | fname = va_arg (ap, const char *); | |
465 | psargs = va_arg (ap, const char *); | |
466 | va_end (ap); | |
467 | ||
468 | if (bed->s->elfclass == ELFCLASS32) | |
469 | { | |
470 | prpsinfo32_t data; | |
471 | memset (&data, 0, sizeof (data)); | |
472 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
473 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
474 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
475 | &data, sizeof (data)); | |
8fd79e71 L |
476 | } |
477 | else | |
478 | { | |
b1bd052d | 479 | prpsinfo64_t data; |
8fd79e71 L |
480 | memset (&data, 0, sizeof (data)); |
481 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
482 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
483 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
484 | &data, sizeof (data)); | |
8fd79e71 | 485 | } |
e85c6a70 | 486 | /* NOTREACHED */ |
8fd79e71 L |
487 | |
488 | case NT_PRSTATUS: | |
489 | va_start (ap, note_type); | |
490 | pid = va_arg (ap, long); | |
491 | cursig = va_arg (ap, int); | |
492 | gregs = va_arg (ap, const void *); | |
493 | va_end (ap); | |
494 | ||
495 | if (bed->s->elfclass == ELFCLASS32) | |
496 | { | |
497 | if (bed->elf_machine_code == EM_X86_64) | |
498 | { | |
499 | prstatusx32_t prstat; | |
500 | memset (&prstat, 0, sizeof (prstat)); | |
501 | prstat.pr_pid = pid; | |
502 | prstat.pr_cursig = cursig; | |
503 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
504 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
505 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
506 | } |
507 | else | |
508 | { | |
509 | prstatus32_t prstat; | |
510 | memset (&prstat, 0, sizeof (prstat)); | |
511 | prstat.pr_pid = pid; | |
512 | prstat.pr_cursig = cursig; | |
513 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
514 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
515 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
516 | } |
517 | } | |
518 | else | |
519 | { | |
b1bd052d | 520 | prstatus64_t prstat; |
8fd79e71 L |
521 | memset (&prstat, 0, sizeof (prstat)); |
522 | prstat.pr_pid = pid; | |
523 | prstat.pr_cursig = cursig; | |
524 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
525 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
526 | &prstat, sizeof (prstat)); | |
8fd79e71 | 527 | } |
8fd79e71 | 528 | } |
e85c6a70 | 529 | /* NOTREACHED */ |
8fd79e71 | 530 | } |
602f1657 AM |
531 | # if GCC_VERSION >= 8000 |
532 | # pragma GCC diagnostic pop | |
533 | # endif | |
8fd79e71 | 534 | #endif |
3bab7989 | 535 | \f |
407443a3 | 536 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 537 | |
70256ad8 AJ |
538 | /* The size in bytes of an entry in the global offset table. */ |
539 | ||
540 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 541 | |
38b12349 | 542 | /* The size in bytes of an entry in the lazy procedure linkage table. */ |
8d88c4ca | 543 | |
38b12349 | 544 | #define LAZY_PLT_ENTRY_SIZE 16 |
70256ad8 | 545 | |
38b12349 L |
546 | /* The size in bytes of an entry in the non-lazy procedure linkage |
547 | table. */ | |
70256ad8 | 548 | |
38b12349 L |
549 | #define NON_LAZY_PLT_ENTRY_SIZE 8 |
550 | ||
551 | /* The first entry in a lazy procedure linkage table looks like this. | |
552 | See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this | |
553 | works. */ | |
554 | ||
555 | static const bfd_byte elf_x86_64_lazy_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
70256ad8 | 556 | { |
653165cc AJ |
557 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
558 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 559 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
560 | }; |
561 | ||
38b12349 | 562 | /* Subsequent entries in a lazy procedure linkage table look like this. */ |
70256ad8 | 563 | |
38b12349 | 564 | static const bfd_byte elf_x86_64_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
70256ad8 | 565 | { |
653165cc | 566 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 567 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 568 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
569 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
570 | 0xe9, /* jmp relative */ | |
571 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
572 | }; | |
573 | ||
38b12349 | 574 | /* The first entry in a lazy procedure linkage table with BND prefix |
0ff2b86e L |
575 | like this. */ |
576 | ||
38b12349 | 577 | static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 578 | { |
07d6d2b8 | 579 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
0ff2b86e | 580 | 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */ |
07d6d2b8 | 581 | 0x0f, 0x1f, 0 /* nopl (%rax) */ |
0ff2b86e L |
582 | }; |
583 | ||
38b12349 L |
584 | /* Subsequent entries for branches with BND prefx in a lazy procedure |
585 | linkage table look like this. */ | |
0ff2b86e | 586 | |
38b12349 | 587 | static const bfd_byte elf_x86_64_lazy_bnd_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 588 | { |
07d6d2b8 AM |
589 | 0x68, 0, 0, 0, 0, /* pushq immediate */ |
590 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
591 | 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */ | |
0ff2b86e L |
592 | }; |
593 | ||
ee2fdd6f L |
594 | /* The first entry in the IBT-enabled lazy procedure linkage table is the |
595 | the same as the lazy PLT with BND prefix so that bound registers are | |
596 | preserved when control is passed to dynamic linker. Subsequent | |
597 | entries for a IBT-enabled lazy procedure linkage table look like | |
598 | this. */ | |
599 | ||
600 | static const bfd_byte elf_x86_64_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
601 | { | |
07d6d2b8 AM |
602 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
603 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
604 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
605 | 0x90 /* nop */ | |
ee2fdd6f L |
606 | }; |
607 | ||
608 | /* The first entry in the x32 IBT-enabled lazy procedure linkage table | |
de194d85 | 609 | is the same as the normal lazy PLT. Subsequent entries for an |
ee2fdd6f L |
610 | x32 IBT-enabled lazy procedure linkage table look like this. */ |
611 | ||
612 | static const bfd_byte elf_x32_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
613 | { | |
07d6d2b8 AM |
614 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
615 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
616 | 0xe9, 0, 0, 0, 0, /* jmpq relative */ | |
617 | 0x66, 0x90 /* xchg %ax,%ax */ | |
ee2fdd6f L |
618 | }; |
619 | ||
38b12349 | 620 | /* Entries in the non-lazey procedure linkage table look like this. */ |
0ff2b86e | 621 | |
38b12349 | 622 | static const bfd_byte elf_x86_64_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 623 | { |
07d6d2b8 AM |
624 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
625 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
626 | 0x66, 0x90 /* xchg %ax,%ax */ | |
0ff2b86e L |
627 | }; |
628 | ||
38b12349 L |
629 | /* Entries for branches with BND prefix in the non-lazey procedure |
630 | linkage table look like this. */ | |
0ff2b86e | 631 | |
38b12349 | 632 | static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 633 | { |
07d6d2b8 AM |
634 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ |
635 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
636 | 0x90 /* nop */ | |
0ff2b86e L |
637 | }; |
638 | ||
ee2fdd6f L |
639 | /* Entries for branches with IBT-enabled in the non-lazey procedure |
640 | linkage table look like this. They have the same size as the lazy | |
641 | PLT entry. */ | |
642 | ||
643 | static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
644 | { | |
07d6d2b8 AM |
645 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
646 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ | |
ee2fdd6f | 647 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
07d6d2b8 | 648 | 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */ |
ee2fdd6f L |
649 | }; |
650 | ||
651 | /* Entries for branches with IBT-enabled in the x32 non-lazey procedure | |
652 | linkage table look like this. They have the same size as the lazy | |
653 | PLT entry. */ | |
654 | ||
655 | static const bfd_byte elf_x32_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
656 | { | |
07d6d2b8 AM |
657 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
658 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ | |
ee2fdd6f L |
659 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
660 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
661 | }; | |
662 | ||
38b12349 | 663 | /* .eh_frame covering the lazy .plt section. */ |
e41b3a13 | 664 | |
38b12349 | 665 | static const bfd_byte elf_x86_64_eh_frame_lazy_plt[] = |
e41b3a13 | 666 | { |
e41b3a13 JJ |
667 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ |
668 | 0, 0, 0, 0, /* CIE ID */ | |
669 | 1, /* CIE version */ | |
670 | 'z', 'R', 0, /* Augmentation string */ | |
671 | 1, /* Code alignment factor */ | |
672 | 0x78, /* Data alignment factor */ | |
673 | 16, /* Return address column */ | |
674 | 1, /* Augmentation size */ | |
675 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
676 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
677 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
678 | DW_CFA_nop, DW_CFA_nop, | |
679 | ||
680 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
681 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
682 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
683 | 0, 0, 0, 0, /* .plt size goes here */ | |
684 | 0, /* Augmentation size */ | |
685 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
686 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
687 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
688 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
689 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
690 | 11, /* Block length */ | |
691 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
692 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
693 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
694 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
695 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
696 | }; | |
697 | ||
38b12349 | 698 | /* .eh_frame covering the lazy BND .plt section. */ |
9e659176 | 699 | |
38b12349 | 700 | static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt[] = |
9e659176 L |
701 | { |
702 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
703 | 0, 0, 0, 0, /* CIE ID */ | |
704 | 1, /* CIE version */ | |
705 | 'z', 'R', 0, /* Augmentation string */ | |
706 | 1, /* Code alignment factor */ | |
707 | 0x78, /* Data alignment factor */ | |
708 | 16, /* Return address column */ | |
709 | 1, /* Augmentation size */ | |
710 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
711 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
712 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
713 | DW_CFA_nop, DW_CFA_nop, | |
714 | ||
715 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
716 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
717 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
718 | 0, 0, 0, 0, /* .plt size goes here */ | |
719 | 0, /* Augmentation size */ | |
720 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
721 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
722 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
723 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
724 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
725 | 11, /* Block length */ | |
726 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
727 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
728 | DW_OP_lit15, DW_OP_and, DW_OP_lit5, DW_OP_ge, | |
729 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
730 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
731 | }; | |
732 | ||
ee2fdd6f L |
733 | /* .eh_frame covering the lazy .plt section with IBT-enabled. */ |
734 | ||
735 | static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt[] = | |
736 | { | |
737 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
738 | 0, 0, 0, 0, /* CIE ID */ | |
739 | 1, /* CIE version */ | |
740 | 'z', 'R', 0, /* Augmentation string */ | |
741 | 1, /* Code alignment factor */ | |
742 | 0x78, /* Data alignment factor */ | |
743 | 16, /* Return address column */ | |
744 | 1, /* Augmentation size */ | |
745 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
746 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
747 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
748 | DW_CFA_nop, DW_CFA_nop, | |
749 | ||
750 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
751 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
752 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
753 | 0, 0, 0, 0, /* .plt size goes here */ | |
754 | 0, /* Augmentation size */ | |
755 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
756 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
757 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
758 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
759 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
760 | 11, /* Block length */ | |
761 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
762 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
763 | DW_OP_lit15, DW_OP_and, DW_OP_lit10, DW_OP_ge, | |
764 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
765 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
766 | }; | |
767 | ||
768 | /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */ | |
769 | ||
770 | static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt[] = | |
771 | { | |
772 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
773 | 0, 0, 0, 0, /* CIE ID */ | |
774 | 1, /* CIE version */ | |
775 | 'z', 'R', 0, /* Augmentation string */ | |
776 | 1, /* Code alignment factor */ | |
777 | 0x78, /* Data alignment factor */ | |
778 | 16, /* Return address column */ | |
779 | 1, /* Augmentation size */ | |
780 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
781 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
782 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
783 | DW_CFA_nop, DW_CFA_nop, | |
784 | ||
785 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
786 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
787 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
788 | 0, 0, 0, 0, /* .plt size goes here */ | |
789 | 0, /* Augmentation size */ | |
790 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
791 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
792 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
793 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
794 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
795 | 11, /* Block length */ | |
796 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
797 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
798 | DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge, | |
799 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
800 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
801 | }; | |
802 | ||
38b12349 | 803 | /* .eh_frame covering the non-lazy .plt section. */ |
fff53dae | 804 | |
38b12349 | 805 | static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt[] = |
fff53dae L |
806 | { |
807 | #define PLT_GOT_FDE_LENGTH 20 | |
808 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
809 | 0, 0, 0, 0, /* CIE ID */ | |
810 | 1, /* CIE version */ | |
811 | 'z', 'R', 0, /* Augmentation string */ | |
812 | 1, /* Code alignment factor */ | |
813 | 0x78, /* Data alignment factor */ | |
814 | 16, /* Return address column */ | |
815 | 1, /* Augmentation size */ | |
816 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
817 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
818 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
819 | DW_CFA_nop, DW_CFA_nop, | |
820 | ||
821 | PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
822 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
38b12349 L |
823 | 0, 0, 0, 0, /* the start of non-lazy .plt goes here */ |
824 | 0, 0, 0, 0, /* non-lazy .plt size goes here */ | |
fff53dae L |
825 | 0, /* Augmentation size */ |
826 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, | |
827 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
828 | }; | |
829 | ||
eed180f8 | 830 | /* These are the standard parameters. */ |
765e526c | 831 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt = |
eed180f8 | 832 | { |
07d6d2b8 AM |
833 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ |
834 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
835 | elf_x86_64_lazy_plt_entry, /* plt_entry */ | |
836 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
837 | 2, /* plt0_got1_offset */ | |
838 | 8, /* plt0_got2_offset */ | |
839 | 12, /* plt0_got2_insn_end */ | |
840 | 2, /* plt_got_offset */ | |
841 | 7, /* plt_reloc_offset */ | |
842 | 12, /* plt_plt_offset */ | |
843 | 6, /* plt_got_insn_size */ | |
844 | LAZY_PLT_ENTRY_SIZE, /* plt_plt_insn_end */ | |
845 | 6, /* plt_lazy_offset */ | |
846 | elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */ | |
847 | elf_x86_64_lazy_plt_entry, /* pic_plt_entry */ | |
848 | elf_x86_64_eh_frame_lazy_plt, /* eh_frame_plt */ | |
38b12349 L |
849 | sizeof (elf_x86_64_eh_frame_lazy_plt) /* eh_frame_plt_size */ |
850 | }; | |
851 | ||
765e526c | 852 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_plt = |
38b12349 | 853 | { |
07d6d2b8 AM |
854 | elf_x86_64_non_lazy_plt_entry, /* plt_entry */ |
855 | elf_x86_64_non_lazy_plt_entry, /* pic_plt_entry */ | |
856 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
857 | 2, /* plt_got_offset */ | |
858 | 6, /* plt_got_insn_size */ | |
859 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
38b12349 | 860 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
eed180f8 RM |
861 | }; |
862 | ||
765e526c | 863 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_bnd_plt = |
0ff2b86e | 864 | { |
07d6d2b8 AM |
865 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ |
866 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
867 | elf_x86_64_lazy_bnd_plt_entry, /* plt_entry */ | |
868 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
869 | 2, /* plt0_got1_offset */ | |
870 | 1+8, /* plt0_got2_offset */ | |
871 | 1+12, /* plt0_got2_insn_end */ | |
872 | 1+2, /* plt_got_offset */ | |
873 | 1, /* plt_reloc_offset */ | |
874 | 7, /* plt_plt_offset */ | |
875 | 1+6, /* plt_got_insn_size */ | |
876 | 11, /* plt_plt_insn_end */ | |
877 | 0, /* plt_lazy_offset */ | |
878 | elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */ | |
879 | elf_x86_64_lazy_bnd_plt_entry, /* pic_plt_entry */ | |
880 | elf_x86_64_eh_frame_lazy_bnd_plt, /* eh_frame_plt */ | |
38b12349 L |
881 | sizeof (elf_x86_64_eh_frame_lazy_bnd_plt) /* eh_frame_plt_size */ |
882 | }; | |
883 | ||
765e526c | 884 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt = |
38b12349 | 885 | { |
07d6d2b8 AM |
886 | elf_x86_64_non_lazy_bnd_plt_entry, /* plt_entry */ |
887 | elf_x86_64_non_lazy_bnd_plt_entry, /* pic_plt_entry */ | |
888 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
889 | 1+2, /* plt_got_offset */ | |
890 | 1+6, /* plt_got_insn_size */ | |
891 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
38b12349 L |
892 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
893 | }; | |
894 | ||
765e526c | 895 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt = |
ee2fdd6f | 896 | { |
07d6d2b8 AM |
897 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ |
898 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
899 | elf_x86_64_lazy_ibt_plt_entry, /* plt_entry */ | |
900 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
901 | 2, /* plt0_got1_offset */ | |
902 | 1+8, /* plt0_got2_offset */ | |
903 | 1+12, /* plt0_got2_insn_end */ | |
904 | 4+1+2, /* plt_got_offset */ | |
905 | 4+1, /* plt_reloc_offset */ | |
906 | 4+1+6, /* plt_plt_offset */ | |
907 | 4+1+6, /* plt_got_insn_size */ | |
908 | 4+1+5+5, /* plt_plt_insn_end */ | |
909 | 0, /* plt_lazy_offset */ | |
910 | elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */ | |
911 | elf_x86_64_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
912 | elf_x86_64_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
913 | sizeof (elf_x86_64_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ |
914 | }; | |
915 | ||
765e526c | 916 | static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt = |
ee2fdd6f | 917 | { |
07d6d2b8 AM |
918 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ |
919 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
920 | elf_x32_lazy_ibt_plt_entry, /* plt_entry */ | |
921 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
922 | 2, /* plt0_got1_offset */ | |
923 | 8, /* plt0_got2_offset */ | |
924 | 12, /* plt0_got2_insn_end */ | |
925 | 4+2, /* plt_got_offset */ | |
926 | 4+1, /* plt_reloc_offset */ | |
927 | 4+6, /* plt_plt_offset */ | |
928 | 4+6, /* plt_got_insn_size */ | |
929 | 4+5+5, /* plt_plt_insn_end */ | |
930 | 0, /* plt_lazy_offset */ | |
931 | elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */ | |
932 | elf_x32_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
933 | elf_x32_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
934 | sizeof (elf_x32_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ |
935 | }; | |
936 | ||
765e526c | 937 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt = |
ee2fdd6f | 938 | { |
07d6d2b8 AM |
939 | elf_x86_64_non_lazy_ibt_plt_entry, /* plt_entry */ |
940 | elf_x86_64_non_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
941 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
942 | 4+1+2, /* plt_got_offset */ | |
943 | 4+1+6, /* plt_got_insn_size */ | |
944 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
945 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
946 | }; | |
947 | ||
765e526c | 948 | static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt = |
ee2fdd6f | 949 | { |
07d6d2b8 AM |
950 | elf_x32_non_lazy_ibt_plt_entry, /* plt_entry */ |
951 | elf_x32_non_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
952 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
953 | 4+2, /* plt_got_offset */ | |
954 | 4+6, /* plt_got_insn_size */ | |
955 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
956 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
957 | }; | |
958 | ||
851b6fa1 | 959 | static const struct elf_x86_backend_data elf_x86_64_arch_bed = |
38b12349 | 960 | { |
07d6d2b8 | 961 | is_normal /* os */ |
0ff2b86e L |
962 | }; |
963 | ||
eed180f8 RM |
964 | #define elf_backend_arch_data &elf_x86_64_arch_bed |
965 | ||
b34976b6 | 966 | static bfd_boolean |
27482721 | 967 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 968 | { |
8d88c4ca NC |
969 | /* Set the right machine number for an x86-64 elf64 file. */ |
970 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 971 | return TRUE; |
8d88c4ca NC |
972 | } |
973 | ||
8059fb19 RM |
974 | static bfd_boolean |
975 | elf32_x86_64_elf_object_p (bfd *abfd) | |
976 | { | |
977 | /* Set the right machine number for an x86-64 elf32 file. */ | |
978 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
979 | return TRUE; | |
980 | } | |
981 | ||
142411ca L |
982 | /* Return TRUE if the TLS access code sequence support transition |
983 | from R_TYPE. */ | |
984 | ||
985 | static bfd_boolean | |
351f65ca L |
986 | elf_x86_64_check_tls_transition (bfd *abfd, |
987 | struct bfd_link_info *info, | |
988 | asection *sec, | |
989 | bfd_byte *contents, | |
990 | Elf_Internal_Shdr *symtab_hdr, | |
991 | struct elf_link_hash_entry **sym_hashes, | |
992 | unsigned int r_type, | |
993 | const Elf_Internal_Rela *rel, | |
994 | const Elf_Internal_Rela *relend) | |
bffbf940 | 995 | { |
142411ca L |
996 | unsigned int val; |
997 | unsigned long r_symndx; | |
5c98a14e | 998 | bfd_boolean largepic = FALSE; |
142411ca L |
999 | struct elf_link_hash_entry *h; |
1000 | bfd_vma offset; | |
0afcef53 | 1001 | struct elf_x86_link_hash_table *htab; |
e2cbcd91 | 1002 | bfd_byte *call; |
1d4af308 | 1003 | bfd_boolean indirect_call; |
142411ca | 1004 | |
0afcef53 | 1005 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
142411ca | 1006 | offset = rel->r_offset; |
bffbf940 | 1007 | switch (r_type) |
142411ca L |
1008 | { |
1009 | case R_X86_64_TLSGD: | |
1010 | case R_X86_64_TLSLD: | |
1011 | if ((rel + 1) >= relend) | |
1012 | return FALSE; | |
1013 | ||
1014 | if (r_type == R_X86_64_TLSGD) | |
1015 | { | |
52bc799a | 1016 | /* Check transition from GD access model. For 64bit, only |
142411ca | 1017 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
e2cbcd91 L |
1018 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1019 | or | |
1020 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
1021 | .byte 0x66; rex64 | |
1022 | call *__tls_get_addr@GOTPCREL(%rip) | |
1023 | which may be converted to | |
1024 | addr32 call __tls_get_addr | |
52bc799a L |
1025 | can transit to different access model. For 32bit, only |
1026 | leaq foo@tlsgd(%rip), %rdi | |
e2cbcd91 L |
1027 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1028 | or | |
1029 | leaq foo@tlsgd(%rip), %rdi | |
1030 | .byte 0x66; rex64 | |
1031 | call *__tls_get_addr@GOTPCREL(%rip) | |
1032 | which may be converted to | |
1033 | addr32 call __tls_get_addr | |
1034 | can transit to different access model. For largepic, | |
5c98a14e | 1035 | we also support: |
07d6d2b8 AM |
1036 | leaq foo@tlsgd(%rip), %rdi |
1037 | movabsq $__tls_get_addr@pltoff, %rax | |
1038 | addq $r15, %rax | |
1039 | call *%rax | |
e2cbcd91 | 1040 | or |
07d6d2b8 AM |
1041 | leaq foo@tlsgd(%rip), %rdi |
1042 | movabsq $__tls_get_addr@pltoff, %rax | |
1043 | addq $rbx, %rax | |
1044 | call *%rax */ | |
142411ca | 1045 | |
fa289a5f AM |
1046 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; |
1047 | ||
5c98a14e | 1048 | if ((offset + 12) > sec->size) |
142411ca | 1049 | return FALSE; |
52bc799a | 1050 | |
e2cbcd91 L |
1051 | call = contents + offset + 4; |
1052 | if (call[0] != 0x66 | |
1053 | || !((call[1] == 0x48 | |
1054 | && call[2] == 0xff | |
1055 | && call[3] == 0x15) | |
1056 | || (call[1] == 0x48 | |
1057 | && call[2] == 0x67 | |
1058 | && call[3] == 0xe8) | |
1059 | || (call[1] == 0x66 | |
1060 | && call[2] == 0x48 | |
1061 | && call[3] == 0xe8))) | |
5c98a14e JJ |
1062 | { |
1063 | if (!ABI_64_P (abfd) | |
1064 | || (offset + 19) > sec->size | |
1065 | || offset < 3 | |
e2cbcd91 L |
1066 | || memcmp (call - 7, leaq + 1, 3) != 0 |
1067 | || memcmp (call, "\x48\xb8", 2) != 0 | |
1068 | || call[11] != 0x01 | |
1069 | || call[13] != 0xff | |
1070 | || call[14] != 0xd0 | |
1071 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1072 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1073 | return FALSE; |
1074 | largepic = TRUE; | |
1075 | } | |
1076 | else if (ABI_64_P (abfd)) | |
52bc799a | 1077 | { |
52bc799a | 1078 | if (offset < 4 |
fa289a5f | 1079 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1080 | return FALSE; |
1081 | } | |
1082 | else | |
1083 | { | |
52bc799a | 1084 | if (offset < 3 |
fa289a5f | 1085 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1086 | return FALSE; |
1087 | } | |
e2cbcd91 | 1088 | indirect_call = call[2] == 0xff; |
142411ca L |
1089 | } |
1090 | else | |
1091 | { | |
1092 | /* Check transition from LD access model. Only | |
1093 | leaq foo@tlsld(%rip), %rdi; | |
e2cbcd91 | 1094 | call __tls_get_addr@PLT |
07d6d2b8 | 1095 | or |
e2cbcd91 L |
1096 | leaq foo@tlsld(%rip), %rdi; |
1097 | call *__tls_get_addr@GOTPCREL(%rip) | |
1098 | which may be converted to | |
1099 | addr32 call __tls_get_addr | |
5c98a14e JJ |
1100 | can transit to different access model. For largepic |
1101 | we also support: | |
07d6d2b8 AM |
1102 | leaq foo@tlsld(%rip), %rdi |
1103 | movabsq $__tls_get_addr@pltoff, %rax | |
1104 | addq $r15, %rax | |
1105 | call *%rax | |
e2cbcd91 | 1106 | or |
07d6d2b8 AM |
1107 | leaq foo@tlsld(%rip), %rdi |
1108 | movabsq $__tls_get_addr@pltoff, %rax | |
1109 | addq $rbx, %rax | |
1110 | call *%rax */ | |
142411ca | 1111 | |
fa289a5f | 1112 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1113 | |
1114 | if (offset < 3 || (offset + 9) > sec->size) | |
1115 | return FALSE; | |
1116 | ||
5c98a14e | 1117 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
142411ca | 1118 | return FALSE; |
5c98a14e | 1119 | |
e2cbcd91 L |
1120 | call = contents + offset + 4; |
1121 | if (!(call[0] == 0xe8 | |
1122 | || (call[0] == 0xff && call[1] == 0x15) | |
1123 | || (call[0] == 0x67 && call[1] == 0xe8))) | |
5c98a14e JJ |
1124 | { |
1125 | if (!ABI_64_P (abfd) | |
1126 | || (offset + 19) > sec->size | |
e2cbcd91 L |
1127 | || memcmp (call, "\x48\xb8", 2) != 0 |
1128 | || call[11] != 0x01 | |
1129 | || call[13] != 0xff | |
1130 | || call[14] != 0xd0 | |
1131 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1132 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1133 | return FALSE; |
1134 | largepic = TRUE; | |
1135 | } | |
e2cbcd91 | 1136 | indirect_call = call[0] == 0xff; |
142411ca L |
1137 | } |
1138 | ||
351f65ca | 1139 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1140 | if (r_symndx < symtab_hdr->sh_info) |
1141 | return FALSE; | |
1142 | ||
1143 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1d4af308 | 1144 | if (h == NULL |
0afcef53 | 1145 | || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr) |
e2cbcd91 | 1146 | return FALSE; |
e2cbcd91 | 1147 | else |
78984959 L |
1148 | { |
1149 | r_type = (ELF32_R_TYPE (rel[1].r_info) | |
1150 | & ~R_X86_64_converted_reloc_bit); | |
1151 | if (largepic) | |
1152 | return r_type == R_X86_64_PLTOFF64; | |
1153 | else if (indirect_call) | |
1154 | return r_type == R_X86_64_GOTPCRELX; | |
1155 | else | |
1156 | return (r_type == R_X86_64_PC32 || r_type == R_X86_64_PLT32); | |
1157 | } | |
142411ca L |
1158 | |
1159 | case R_X86_64_GOTTPOFF: | |
1160 | /* Check transition from IE access model: | |
4a4c5f25 L |
1161 | mov foo@gottpoff(%rip), %reg |
1162 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1163 | */ |
1164 | ||
4a4c5f25 L |
1165 | /* Check REX prefix first. */ |
1166 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1167 | { | |
1168 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1169 | if (val != 0x48 && val != 0x4c) | |
1170 | { | |
1171 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1172 | if (ABI_64_P (abfd)) | |
1173 | return FALSE; | |
1174 | } | |
1175 | } | |
1176 | else | |
1177 | { | |
1178 | /* X32 may not have any REX prefix. */ | |
1179 | if (ABI_64_P (abfd)) | |
1180 | return FALSE; | |
1181 | if (offset < 2 || (offset + 3) > sec->size) | |
1182 | return FALSE; | |
1183 | } | |
142411ca L |
1184 | |
1185 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1186 | if (val != 0x8b && val != 0x03) | |
1187 | return FALSE; | |
1188 | ||
1189 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1190 | return (val & 0xc7) == 5; | |
1191 | ||
1192 | case R_X86_64_GOTPC32_TLSDESC: | |
1193 | /* Check transition from GDesc access model: | |
1194 | leaq x@tlsdesc(%rip), %rax | |
1195 | ||
1196 | Make sure it's a leaq adding rip to a 32-bit offset | |
1197 | into any register, although it's probably almost always | |
1198 | going to be rax. */ | |
1199 | ||
1200 | if (offset < 3 || (offset + 4) > sec->size) | |
1201 | return FALSE; | |
1202 | ||
1203 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1204 | if ((val & 0xfb) != 0x48) | |
1205 | return FALSE; | |
1206 | ||
1207 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1208 | return FALSE; | |
1209 | ||
1210 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1211 | return (val & 0xc7) == 0x05; | |
1212 | ||
1213 | case R_X86_64_TLSDESC_CALL: | |
1214 | /* Check transition from GDesc access model: | |
1215 | call *x@tlsdesc(%rax) | |
1216 | */ | |
1217 | if (offset + 2 <= sec->size) | |
1218 | { | |
1219 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
e2cbcd91 L |
1220 | call = contents + offset; |
1221 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1222 | } |
1223 | ||
1224 | return FALSE; | |
1225 | ||
1226 | default: | |
1227 | abort (); | |
1228 | } | |
1229 | } | |
1230 | ||
1231 | /* Return TRUE if the TLS access transition is OK or no transition | |
1232 | will be performed. Update R_TYPE if there is a transition. */ | |
1233 | ||
1234 | static bfd_boolean | |
351f65ca L |
1235 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1236 | asection *sec, bfd_byte *contents, | |
1237 | Elf_Internal_Shdr *symtab_hdr, | |
1238 | struct elf_link_hash_entry **sym_hashes, | |
1239 | unsigned int *r_type, int tls_type, | |
1240 | const Elf_Internal_Rela *rel, | |
1241 | const Elf_Internal_Rela *relend, | |
1242 | struct elf_link_hash_entry *h, | |
bedfd056 L |
1243 | unsigned long r_symndx, |
1244 | bfd_boolean from_relocate_section) | |
142411ca L |
1245 | { |
1246 | unsigned int from_type = *r_type; | |
1247 | unsigned int to_type = from_type; | |
1248 | bfd_boolean check = TRUE; | |
1249 | ||
bb1cb422 L |
1250 | /* Skip TLS transition for functions. */ |
1251 | if (h != NULL | |
1252 | && (h->type == STT_FUNC | |
1253 | || h->type == STT_GNU_IFUNC)) | |
1254 | return TRUE; | |
1255 | ||
142411ca | 1256 | switch (from_type) |
bffbf940 JJ |
1257 | { |
1258 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1259 | case R_X86_64_GOTPC32_TLSDESC: |
1260 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1261 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1262 | if (bfd_link_executable (info)) |
142411ca L |
1263 | { |
1264 | if (h == NULL) | |
1265 | to_type = R_X86_64_TPOFF32; | |
1266 | else | |
1267 | to_type = R_X86_64_GOTTPOFF; | |
1268 | } | |
1269 | ||
bedfd056 L |
1270 | /* When we are called from elf_x86_64_relocate_section, there may |
1271 | be additional transitions based on TLS_TYPE. */ | |
1272 | if (from_relocate_section) | |
142411ca L |
1273 | { |
1274 | unsigned int new_to_type = to_type; | |
1275 | ||
51537393 | 1276 | if (TLS_TRANSITION_IE_TO_LE_P (info, h, tls_type)) |
142411ca L |
1277 | new_to_type = R_X86_64_TPOFF32; |
1278 | ||
1279 | if (to_type == R_X86_64_TLSGD | |
1280 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1281 | || to_type == R_X86_64_TLSDESC_CALL) | |
1282 | { | |
1283 | if (tls_type == GOT_TLS_IE) | |
1284 | new_to_type = R_X86_64_GOTTPOFF; | |
1285 | } | |
1286 | ||
1287 | /* We checked the transition before when we were called from | |
351f65ca | 1288 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1289 | transition which hasn't been checked before. */ |
1290 | check = new_to_type != to_type && from_type == to_type; | |
1291 | to_type = new_to_type; | |
1292 | } | |
1293 | ||
1294 | break; | |
1295 | ||
bffbf940 | 1296 | case R_X86_64_TLSLD: |
0e1862bb | 1297 | if (bfd_link_executable (info)) |
142411ca L |
1298 | to_type = R_X86_64_TPOFF32; |
1299 | break; | |
1300 | ||
1301 | default: | |
1302 | return TRUE; | |
bffbf940 JJ |
1303 | } |
1304 | ||
142411ca L |
1305 | /* Return TRUE if there is no transition. */ |
1306 | if (from_type == to_type) | |
1307 | return TRUE; | |
1308 | ||
1309 | /* Check if the transition can be performed. */ | |
1310 | if (check | |
351f65ca L |
1311 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1312 | symtab_hdr, sym_hashes, | |
1313 | from_type, rel, relend)) | |
142411ca | 1314 | { |
2f629d23 | 1315 | reloc_howto_type *from, *to; |
4c544807 | 1316 | const char *name; |
142411ca | 1317 | |
351f65ca L |
1318 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1319 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1320 | |
f3185997 NC |
1321 | if (from == NULL || to == NULL) |
1322 | return FALSE; | |
1323 | ||
4c544807 L |
1324 | if (h) |
1325 | name = h->root.root.string; | |
1326 | else | |
1327 | { | |
0afcef53 | 1328 | struct elf_x86_link_hash_table *htab; |
4dfe6ac6 | 1329 | |
0afcef53 | 1330 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
1331 | if (htab == NULL) |
1332 | name = "*unknown*"; | |
1333 | else | |
1334 | { | |
1335 | Elf_Internal_Sym *isym; | |
1336 | ||
1337 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1338 | abfd, r_symndx); | |
1339 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1340 | } | |
4c544807 L |
1341 | } |
1342 | ||
4eca0228 | 1343 | _bfd_error_handler |
695344c0 | 1344 | /* xgettext:c-format */ |
2dcf00ce AM |
1345 | (_("%pB: TLS transition from %s to %s against `%s' at %#" PRIx64 |
1346 | " in section `%pA' failed"), | |
1347 | abfd, from->name, to->name, name, (uint64_t) rel->r_offset, sec); | |
142411ca L |
1348 | bfd_set_error (bfd_error_bad_value); |
1349 | return FALSE; | |
1350 | } | |
1351 | ||
1352 | *r_type = to_type; | |
1353 | return TRUE; | |
bffbf940 JJ |
1354 | } |
1355 | ||
c1d11331 L |
1356 | /* Rename some of the generic section flags to better document how they |
1357 | are used here. */ | |
6999821f | 1358 | #define check_relocs_failed sec_flg0 |
338c190a L |
1359 | |
1360 | static bfd_boolean | |
aab921ad L |
1361 | elf_x86_64_need_pic (struct bfd_link_info *info, |
1362 | bfd *input_bfd, asection *sec, | |
338c190a L |
1363 | struct elf_link_hash_entry *h, |
1364 | Elf_Internal_Shdr *symtab_hdr, | |
1365 | Elf_Internal_Sym *isym, | |
1366 | reloc_howto_type *howto) | |
1367 | { | |
1368 | const char *v = ""; | |
1369 | const char *und = ""; | |
1370 | const char *pic = ""; | |
aab921ad | 1371 | const char *object; |
338c190a L |
1372 | |
1373 | const char *name; | |
1374 | if (h) | |
1375 | { | |
1376 | name = h->root.root.string; | |
1377 | switch (ELF_ST_VISIBILITY (h->other)) | |
1378 | { | |
1379 | case STV_HIDDEN: | |
1380 | v = _("hidden symbol "); | |
1381 | break; | |
1382 | case STV_INTERNAL: | |
1383 | v = _("internal symbol "); | |
1384 | break; | |
1385 | case STV_PROTECTED: | |
1386 | v = _("protected symbol "); | |
1387 | break; | |
1388 | default: | |
0afcef53 | 1389 | if (((struct elf_x86_link_hash_entry *) h)->def_protected) |
a5b4ee94 L |
1390 | v = _("protected symbol "); |
1391 | else | |
1392 | v = _("symbol "); | |
338c190a L |
1393 | pic = _("; recompile with -fPIC"); |
1394 | break; | |
1395 | } | |
1396 | ||
1397 | if (!h->def_regular && !h->def_dynamic) | |
1398 | und = _("undefined "); | |
1399 | } | |
1400 | else | |
1401 | { | |
1402 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL); | |
1403 | pic = _("; recompile with -fPIC"); | |
1404 | } | |
1405 | ||
aab921ad L |
1406 | if (bfd_link_dll (info)) |
1407 | object = _("a shared object"); | |
1408 | else if (bfd_link_pie (info)) | |
1409 | object = _("a PIE object"); | |
1410 | else | |
1411 | object = _("a PDE object"); | |
1412 | ||
695344c0 | 1413 | /* xgettext:c-format */ |
871b3ab2 | 1414 | _bfd_error_handler (_("%pB: relocation %s against %s%s`%s' can " |
aab921ad L |
1415 | "not be used when making %s%s"), |
1416 | input_bfd, howto->name, und, v, name, | |
1417 | object, pic); | |
338c190a L |
1418 | bfd_set_error (bfd_error_bad_value); |
1419 | sec->check_relocs_failed = 1; | |
1420 | return FALSE; | |
1421 | } | |
c1d11331 | 1422 | |
c175a657 L |
1423 | /* With the local symbol, foo, we convert |
1424 | mov foo@GOTPCREL(%rip), %reg | |
1425 | to | |
1426 | lea foo(%rip), %reg | |
1427 | and convert | |
1428 | call/jmp *foo@GOTPCREL(%rip) | |
1429 | to | |
1430 | nop call foo/jmp foo nop | |
1431 | When PIC is false, convert | |
1432 | test %reg, foo@GOTPCREL(%rip) | |
1433 | to | |
1434 | test $foo, %reg | |
1435 | and convert | |
1436 | binop foo@GOTPCREL(%rip), %reg | |
1437 | to | |
1438 | binop $foo, %reg | |
1439 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1440 | instructions. */ | |
1441 | ||
1442 | static bfd_boolean | |
8b43e456 | 1443 | elf_x86_64_convert_load_reloc (bfd *abfd, |
c175a657 | 1444 | bfd_byte *contents, |
6999821f | 1445 | unsigned int *r_type_p, |
c175a657 L |
1446 | Elf_Internal_Rela *irel, |
1447 | struct elf_link_hash_entry *h, | |
1448 | bfd_boolean *converted, | |
1449 | struct bfd_link_info *link_info) | |
1450 | { | |
0afcef53 | 1451 | struct elf_x86_link_hash_table *htab; |
c175a657 | 1452 | bfd_boolean is_pic; |
8b43e456 | 1453 | bfd_boolean no_overflow; |
c175a657 L |
1454 | bfd_boolean relocx; |
1455 | bfd_boolean to_reloc_pc32; | |
1456 | asection *tsec; | |
c175a657 L |
1457 | bfd_signed_vma raddend; |
1458 | unsigned int opcode; | |
1459 | unsigned int modrm; | |
6999821f | 1460 | unsigned int r_type = *r_type_p; |
c175a657 | 1461 | unsigned int r_symndx; |
c175a657 L |
1462 | bfd_vma roff = irel->r_offset; |
1463 | ||
1464 | if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2)) | |
1465 | return TRUE; | |
1466 | ||
1467 | raddend = irel->r_addend; | |
1468 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
1469 | if (raddend != -4) | |
1470 | return TRUE; | |
1471 | ||
0afcef53 | 1472 | htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA); |
c175a657 L |
1473 | is_pic = bfd_link_pic (link_info); |
1474 | ||
1475 | relocx = (r_type == R_X86_64_GOTPCRELX | |
1476 | || r_type == R_X86_64_REX_GOTPCRELX); | |
1477 | ||
8b43e456 L |
1478 | /* TRUE if --no-relax is used. */ |
1479 | no_overflow = link_info->disable_target_specific_optimizations > 1; | |
c175a657 L |
1480 | |
1481 | r_symndx = htab->r_sym (irel->r_info); | |
1482 | ||
1483 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1484 | ||
1485 | /* Convert mov to lea since it has been done for a while. */ | |
1486 | if (opcode != 0x8b) | |
1487 | { | |
1488 | /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX | |
1489 | for call, jmp or one of adc, add, and, cmp, or, sbb, sub, | |
1490 | test, xor instructions. */ | |
1491 | if (!relocx) | |
1492 | return TRUE; | |
1493 | } | |
1494 | ||
1495 | /* We convert only to R_X86_64_PC32: | |
1496 | 1. Branch. | |
1497 | 2. R_X86_64_GOTPCREL since we can't modify REX byte. | |
8b43e456 | 1498 | 3. no_overflow is true. |
c175a657 L |
1499 | 4. PIC. |
1500 | */ | |
1501 | to_reloc_pc32 = (opcode == 0xff | |
1502 | || !relocx | |
8b43e456 | 1503 | || no_overflow |
c175a657 L |
1504 | || is_pic); |
1505 | ||
1506 | /* Get the symbol referred to by the reloc. */ | |
1507 | if (h == NULL) | |
1508 | { | |
1509 | Elf_Internal_Sym *isym | |
1510 | = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx); | |
1511 | ||
1512 | /* Skip relocation against undefined symbols. */ | |
1513 | if (isym->st_shndx == SHN_UNDEF) | |
1514 | return TRUE; | |
1515 | ||
c175a657 L |
1516 | if (isym->st_shndx == SHN_ABS) |
1517 | tsec = bfd_abs_section_ptr; | |
1518 | else if (isym->st_shndx == SHN_COMMON) | |
1519 | tsec = bfd_com_section_ptr; | |
1520 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
1521 | tsec = &_bfd_elf_large_com_section; | |
1522 | else | |
1523 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c175a657 L |
1524 | } |
1525 | else | |
1526 | { | |
1527 | /* Undefined weak symbol is only bound locally in executable | |
1528 | and its reference is resolved as 0 without relocation | |
1529 | overflow. We can only perform this optimization for | |
1530 | GOTPCRELX relocations since we need to modify REX byte. | |
1531 | It is OK convert mov with R_X86_64_GOTPCREL to | |
1532 | R_X86_64_PC32. */ | |
0a27fed7 L |
1533 | bfd_boolean local_ref; |
1534 | struct elf_x86_link_hash_entry *eh = elf_x86_hash_entry (h); | |
1535 | ||
1536 | /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */ | |
1537 | local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h); | |
c175a657 | 1538 | if ((relocx || opcode == 0x8b) |
0a27fed7 L |
1539 | && (h->root.type == bfd_link_hash_undefweak |
1540 | && !eh->linker_def | |
1541 | && local_ref)) | |
c175a657 L |
1542 | { |
1543 | if (opcode == 0xff) | |
1544 | { | |
1545 | /* Skip for branch instructions since R_X86_64_PC32 | |
1546 | may overflow. */ | |
8b43e456 | 1547 | if (no_overflow) |
c175a657 L |
1548 | return TRUE; |
1549 | } | |
1550 | else if (relocx) | |
1551 | { | |
1552 | /* For non-branch instructions, we can convert to | |
1553 | R_X86_64_32/R_X86_64_32S since we know if there | |
1554 | is a REX byte. */ | |
1555 | to_reloc_pc32 = FALSE; | |
1556 | } | |
1557 | ||
1558 | /* Since we don't know the current PC when PIC is true, | |
1559 | we can't convert to R_X86_64_PC32. */ | |
1560 | if (to_reloc_pc32 && is_pic) | |
1561 | return TRUE; | |
1562 | ||
1563 | goto convert; | |
1564 | } | |
1565 | /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since | |
1566 | ld.so may use its link-time address. */ | |
cbd0eecf | 1567 | else if (h->start_stop |
0a27fed7 | 1568 | || eh->linker_def |
cbd0eecf L |
1569 | || ((h->def_regular |
1570 | || h->root.type == bfd_link_hash_defined | |
1571 | || h->root.type == bfd_link_hash_defweak) | |
1572 | && h != htab->elf.hdynamic | |
0a27fed7 | 1573 | && local_ref)) |
c175a657 L |
1574 | { |
1575 | /* bfd_link_hash_new or bfd_link_hash_undefined is | |
1576 | set by an assignment in a linker script in | |
cbd0eecf L |
1577 | bfd_elf_record_link_assignment. start_stop is set |
1578 | on __start_SECNAME/__stop_SECNAME which mark section | |
1579 | SECNAME. */ | |
1580 | if (h->start_stop | |
0a27fed7 | 1581 | || eh->linker_def |
cbd0eecf L |
1582 | || (h->def_regular |
1583 | && (h->root.type == bfd_link_hash_new | |
1584 | || h->root.type == bfd_link_hash_undefined | |
1585 | || ((h->root.type == bfd_link_hash_defined | |
1586 | || h->root.type == bfd_link_hash_defweak) | |
1587 | && h->root.u.def.section == bfd_und_section_ptr)))) | |
c175a657 L |
1588 | { |
1589 | /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */ | |
8b43e456 | 1590 | if (no_overflow) |
c175a657 L |
1591 | return TRUE; |
1592 | goto convert; | |
1593 | } | |
1594 | tsec = h->root.u.def.section; | |
c175a657 L |
1595 | } |
1596 | else | |
1597 | return TRUE; | |
1598 | } | |
1599 | ||
2168b268 L |
1600 | /* Don't convert GOTPCREL relocation against large section. */ |
1601 | if (elf_section_data (tsec) != NULL | |
1602 | && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0) | |
1603 | return TRUE; | |
1604 | ||
8b43e456 L |
1605 | /* Skip since R_X86_64_PC32/R_X86_64_32/R_X86_64_32S may overflow. */ |
1606 | if (no_overflow) | |
1607 | return TRUE; | |
c175a657 | 1608 | |
dc089072 | 1609 | convert: |
c175a657 L |
1610 | if (opcode == 0xff) |
1611 | { | |
1612 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
1613 | unsigned int nop; | |
1614 | unsigned int disp; | |
1615 | bfd_vma nop_offset; | |
1616 | ||
1617 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
1618 | R_X86_64_PC32. */ | |
1619 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1620 | if (modrm == 0x25) | |
1621 | { | |
1622 | /* Convert to "jmp foo nop". */ | |
1623 | modrm = 0xe9; | |
1624 | nop = NOP_OPCODE; | |
1625 | nop_offset = irel->r_offset + 3; | |
1626 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1627 | irel->r_offset -= 1; | |
1628 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1629 | } | |
1630 | else | |
1631 | { | |
0afcef53 L |
1632 | struct elf_x86_link_hash_entry *eh |
1633 | = (struct elf_x86_link_hash_entry *) h; | |
e2cbcd91 | 1634 | |
c175a657 L |
1635 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
1636 | is a nop prefix. */ | |
1637 | modrm = 0xe8; | |
e2cbcd91 L |
1638 | /* To support TLS optimization, always use addr32 prefix for |
1639 | "call *__tls_get_addr@GOTPCREL(%rip)". */ | |
1d4af308 | 1640 | if (eh && eh->tls_get_addr) |
c175a657 | 1641 | { |
e2cbcd91 L |
1642 | nop = 0x67; |
1643 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1644 | } |
1645 | else | |
e2cbcd91 L |
1646 | { |
1647 | nop = link_info->call_nop_byte; | |
1648 | if (link_info->call_nop_as_suffix) | |
1649 | { | |
1650 | nop_offset = irel->r_offset + 3; | |
1651 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1652 | irel->r_offset -= 1; | |
1653 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1654 | } | |
1655 | else | |
1656 | nop_offset = irel->r_offset - 2; | |
1657 | } | |
c175a657 L |
1658 | } |
1659 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1660 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1661 | r_type = R_X86_64_PC32; | |
1662 | } | |
1663 | else | |
1664 | { | |
1665 | unsigned int rex; | |
1666 | unsigned int rex_mask = REX_R; | |
1667 | ||
1668 | if (r_type == R_X86_64_REX_GOTPCRELX) | |
1669 | rex = bfd_get_8 (abfd, contents + roff - 3); | |
1670 | else | |
1671 | rex = 0; | |
1672 | ||
1673 | if (opcode == 0x8b) | |
1674 | { | |
1675 | if (to_reloc_pc32) | |
1676 | { | |
1677 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1678 | "lea foo(%rip), %reg". */ | |
1679 | opcode = 0x8d; | |
1680 | r_type = R_X86_64_PC32; | |
1681 | } | |
1682 | else | |
1683 | { | |
1684 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1685 | "mov $foo, %reg". */ | |
1686 | opcode = 0xc7; | |
1687 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1688 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1689 | if ((rex & REX_W) != 0 | |
1690 | && ABI_64_P (link_info->output_bfd)) | |
1691 | { | |
1692 | /* Keep the REX_W bit in REX byte for LP64. */ | |
1693 | r_type = R_X86_64_32S; | |
1694 | goto rewrite_modrm_rex; | |
1695 | } | |
1696 | else | |
1697 | { | |
1698 | /* If the REX_W bit in REX byte isn't needed, | |
1699 | use R_X86_64_32 and clear the W bit to avoid | |
1700 | sign-extend imm32 to imm64. */ | |
1701 | r_type = R_X86_64_32; | |
1702 | /* Clear the W bit in REX byte. */ | |
1703 | rex_mask |= REX_W; | |
1704 | goto rewrite_modrm_rex; | |
1705 | } | |
1706 | } | |
1707 | } | |
1708 | else | |
1709 | { | |
1710 | /* R_X86_64_PC32 isn't supported. */ | |
1711 | if (to_reloc_pc32) | |
1712 | return TRUE; | |
1713 | ||
1714 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1715 | if (opcode == 0x85) | |
1716 | { | |
1717 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
1718 | "test $foo, %reg". */ | |
1719 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1720 | opcode = 0xf7; | |
1721 | } | |
1722 | else | |
1723 | { | |
1724 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
1725 | "binop $foo, %reg". */ | |
1726 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
1727 | opcode = 0x81; | |
1728 | } | |
1729 | ||
1730 | /* Use R_X86_64_32 with 32-bit operand to avoid relocation | |
1731 | overflow when sign-extending imm32 to imm64. */ | |
1732 | r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32; | |
1733 | ||
1734 | rewrite_modrm_rex: | |
1735 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1736 | ||
1737 | if (rex) | |
1738 | { | |
1739 | /* Move the R bit to the B bit in REX byte. */ | |
1740 | rex = (rex & ~rex_mask) | (rex & REX_R) >> 2; | |
1741 | bfd_put_8 (abfd, rex, contents + roff - 3); | |
1742 | } | |
1743 | ||
1744 | /* No addend for R_X86_64_32/R_X86_64_32S relocations. */ | |
1745 | irel->r_addend = 0; | |
1746 | } | |
1747 | ||
1748 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1749 | } | |
1750 | ||
6999821f | 1751 | *r_type_p = r_type; |
78984959 L |
1752 | irel->r_info = htab->r_info (r_symndx, |
1753 | r_type | R_X86_64_converted_reloc_bit); | |
c175a657 L |
1754 | |
1755 | *converted = TRUE; | |
1756 | ||
1757 | return TRUE; | |
1758 | } | |
1759 | ||
70256ad8 | 1760 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1761 | calculate needed space in the global offset table, procedure |
1762 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1763 | |
b34976b6 | 1764 | static bfd_boolean |
351f65ca L |
1765 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1766 | asection *sec, | |
1767 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1768 | { |
0afcef53 | 1769 | struct elf_x86_link_hash_table *htab; |
70256ad8 AJ |
1770 | Elf_Internal_Shdr *symtab_hdr; |
1771 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1772 | const Elf_Internal_Rela *rel; |
1773 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 1774 | asection *sreloc; |
bedfd056 | 1775 | bfd_byte *contents; |
5e5e02ae | 1776 | bfd_boolean converted; |
70256ad8 | 1777 | |
0e1862bb | 1778 | if (bfd_link_relocatable (info)) |
b34976b6 | 1779 | return TRUE; |
70256ad8 | 1780 | |
081b1afe L |
1781 | /* Don't do anything special with non-loaded, non-alloced sections. |
1782 | In particular, any relocs in such sections should not affect GOT | |
1783 | and PLT reference counting (ie. we don't allow them to create GOT | |
1784 | or PLT entries), there's no possibility or desire to optimize TLS | |
1785 | relocs, and there's not much point in propagating relocs to shared | |
1786 | libs that the dynamic linker won't relocate. */ | |
1787 | if ((sec->flags & SEC_ALLOC) == 0) | |
1788 | return TRUE; | |
1789 | ||
0afcef53 | 1790 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 | 1791 | if (htab == NULL) |
afd9acee L |
1792 | { |
1793 | sec->check_relocs_failed = 1; | |
1794 | return FALSE; | |
1795 | } | |
4dfe6ac6 | 1796 | |
fe53b4a4 L |
1797 | BFD_ASSERT (is_x86_elf (abfd, htab)); |
1798 | ||
bedfd056 L |
1799 | /* Get the section contents. */ |
1800 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1801 | contents = elf_section_data (sec)->this_hdr.contents; | |
1802 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1803 | { | |
1804 | sec->check_relocs_failed = 1; | |
1805 | return FALSE; | |
1806 | } | |
1807 | ||
0ffa91dd | 1808 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1809 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1810 | |
5e5e02ae L |
1811 | converted = FALSE; |
1812 | ||
c434dee6 | 1813 | sreloc = NULL; |
cbe950e9 | 1814 | |
70256ad8 AJ |
1815 | rel_end = relocs + sec->reloc_count; |
1816 | for (rel = relocs; rel < rel_end; rel++) | |
1817 | { | |
bffbf940 | 1818 | unsigned int r_type; |
d42c267e | 1819 | unsigned int r_symndx; |
70256ad8 | 1820 | struct elf_link_hash_entry *h; |
0afcef53 | 1821 | struct elf_x86_link_hash_entry *eh; |
4c544807 L |
1822 | Elf_Internal_Sym *isym; |
1823 | const char *name; | |
06a6a421 | 1824 | bfd_boolean size_reloc; |
6999821f | 1825 | bfd_boolean converted_reloc; |
70256ad8 | 1826 | |
351f65ca L |
1827 | r_symndx = htab->r_sym (rel->r_info); |
1828 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1829 | |
1830 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1831 | { | |
695344c0 | 1832 | /* xgettext:c-format */ |
871b3ab2 | 1833 | _bfd_error_handler (_("%pB: bad symbol index: %d"), |
4eca0228 | 1834 | abfd, r_symndx); |
afd9acee | 1835 | goto error_return; |
c434dee6 AJ |
1836 | } |
1837 | ||
70256ad8 | 1838 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1839 | { |
1840 | /* A local symbol. */ | |
c2e61a4e L |
1841 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1842 | abfd, r_symndx); | |
1843 | if (isym == NULL) | |
afd9acee | 1844 | goto error_return; |
c25bc9fc L |
1845 | |
1846 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1847 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1848 | { |
0afcef53 L |
1849 | h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, |
1850 | TRUE); | |
c25bc9fc | 1851 | if (h == NULL) |
afd9acee | 1852 | goto error_return; |
6bbec505 | 1853 | |
c25bc9fc | 1854 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
1855 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
1856 | isym, NULL); | |
c25bc9fc L |
1857 | h->type = STT_GNU_IFUNC; |
1858 | h->def_regular = 1; | |
1859 | h->ref_regular = 1; | |
1860 | h->forced_local = 1; | |
1861 | h->root.type = bfd_link_hash_defined; | |
1862 | } | |
1863 | else | |
1864 | h = NULL; | |
1865 | } | |
70256ad8 | 1866 | else |
71cb9464 | 1867 | { |
4c544807 | 1868 | isym = NULL; |
71cb9464 L |
1869 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1870 | while (h->root.type == bfd_link_hash_indirect | |
1871 | || h->root.type == bfd_link_hash_warning) | |
1872 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1873 | } |
cbe950e9 | 1874 | |
d1534d16 L |
1875 | /* Check invalid x32 relocations. */ |
1876 | if (!ABI_64_P (abfd)) | |
1877 | switch (r_type) | |
1878 | { | |
1879 | default: | |
1880 | break; | |
1881 | ||
d1534d16 L |
1882 | case R_X86_64_DTPOFF64: |
1883 | case R_X86_64_TPOFF64: | |
1884 | case R_X86_64_PC64: | |
1885 | case R_X86_64_GOTOFF64: | |
1886 | case R_X86_64_GOT64: | |
1887 | case R_X86_64_GOTPCREL64: | |
1888 | case R_X86_64_GOTPC64: | |
1889 | case R_X86_64_GOTPLT64: | |
1890 | case R_X86_64_PLTOFF64: | |
1891 | { | |
1892 | if (h) | |
1893 | name = h->root.root.string; | |
1894 | else | |
1895 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1896 | NULL); | |
4eca0228 | 1897 | _bfd_error_handler |
695344c0 | 1898 | /* xgettext:c-format */ |
871b3ab2 | 1899 | (_("%pB: relocation %s against symbol `%s' isn't " |
d1534d16 L |
1900 | "supported in x32 mode"), abfd, |
1901 | x86_64_elf_howto_table[r_type].name, name); | |
1902 | bfd_set_error (bfd_error_bad_value); | |
afd9acee | 1903 | goto error_return; |
d1534d16 L |
1904 | } |
1905 | break; | |
1906 | } | |
1907 | ||
c25bc9fc L |
1908 | if (h != NULL) |
1909 | { | |
ad1e85de L |
1910 | /* It is referenced by a non-shared object. */ |
1911 | h->ref_regular = 1; | |
13a2df29 L |
1912 | |
1913 | if (h->type == STT_GNU_IFUNC) | |
1914 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
1915 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 1916 | } |
70256ad8 | 1917 | |
6999821f L |
1918 | converted_reloc = FALSE; |
1919 | if ((r_type == R_X86_64_GOTPCREL | |
1920 | || r_type == R_X86_64_GOTPCRELX | |
1921 | || r_type == R_X86_64_REX_GOTPCRELX) | |
1922 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
1923 | { | |
1924 | Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel; | |
1925 | if (!elf_x86_64_convert_load_reloc (abfd, contents, &r_type, | |
1926 | irel, h, &converted_reloc, | |
1927 | info)) | |
1928 | goto error_return; | |
5e5e02ae L |
1929 | |
1930 | if (converted_reloc) | |
1931 | converted = TRUE; | |
6999821f L |
1932 | } |
1933 | ||
bedfd056 | 1934 | if (! elf_x86_64_tls_transition (info, abfd, sec, contents, |
351f65ca L |
1935 | symtab_hdr, sym_hashes, |
1936 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 1937 | rel, rel_end, h, r_symndx, FALSE)) |
afd9acee | 1938 | goto error_return; |
142411ca | 1939 | |
cd048363 L |
1940 | /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */ |
1941 | if (h == htab->elf.hgot) | |
1942 | htab->got_referenced = TRUE; | |
1943 | ||
0afcef53 | 1944 | eh = (struct elf_x86_link_hash_entry *) h; |
bffbf940 | 1945 | switch (r_type) |
70256ad8 | 1946 | { |
bffbf940 | 1947 | case R_X86_64_TLSLD: |
0f09b4d8 | 1948 | htab->tls_ld_or_ldm_got.refcount = 1; |
bffbf940 JJ |
1949 | goto create_got; |
1950 | ||
1951 | case R_X86_64_TPOFF32: | |
0e1862bb | 1952 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
aab921ad | 1953 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 1954 | &x86_64_elf_howto_table[r_type]); |
aec6b87e | 1955 | if (eh != NULL) |
98b273dc | 1956 | eh->zero_undefweak &= 0x2; |
bffbf940 | 1957 | break; |
c434dee6 | 1958 | |
bffbf940 | 1959 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1960 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
1961 | info->flags |= DF_STATIC_TLS; |
1962 | /* Fall through */ | |
70256ad8 | 1963 | |
bffbf940 JJ |
1964 | case R_X86_64_GOT32: |
1965 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
1966 | case R_X86_64_GOTPCRELX: |
1967 | case R_X86_64_REX_GOTPCRELX: | |
bffbf940 | 1968 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
1969 | case R_X86_64_GOT64: |
1970 | case R_X86_64_GOTPCREL64: | |
1971 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
1972 | case R_X86_64_GOTPC32_TLSDESC: |
1973 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
1974 | /* This symbol requires a global offset table entry. */ |
1975 | { | |
1976 | int tls_type, old_tls_type; | |
1977 | ||
1978 | switch (r_type) | |
1979 | { | |
1980 | default: tls_type = GOT_NORMAL; break; | |
1981 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
1982 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
1983 | case R_X86_64_GOTPC32_TLSDESC: |
1984 | case R_X86_64_TLSDESC_CALL: | |
1985 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
1986 | } |
1987 | ||
1988 | if (h != NULL) | |
1989 | { | |
0f09b4d8 | 1990 | h->got.refcount = 1; |
aec6b87e | 1991 | old_tls_type = eh->tls_type; |
bffbf940 JJ |
1992 | } |
1993 | else | |
1994 | { | |
1995 | bfd_signed_vma *local_got_refcounts; | |
1996 | ||
1997 | /* This is a global offset table entry for a local symbol. */ | |
1998 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1999 | if (local_got_refcounts == NULL) | |
2000 | { | |
2001 | bfd_size_type size; | |
2002 | ||
2003 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
2004 | size *= sizeof (bfd_signed_vma) |
2005 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
2006 | local_got_refcounts = ((bfd_signed_vma *) |
2007 | bfd_zalloc (abfd, size)); | |
2008 | if (local_got_refcounts == NULL) | |
afd9acee | 2009 | goto error_return; |
bffbf940 | 2010 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
0afcef53 | 2011 | elf_x86_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 2012 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
0afcef53 | 2013 | elf_x86_local_got_tls_type (abfd) |
67a4f2b7 | 2014 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 | 2015 | } |
0f09b4d8 | 2016 | local_got_refcounts[r_symndx] = 1; |
bffbf940 | 2017 | old_tls_type |
0afcef53 | 2018 | = elf_x86_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
2019 | } |
2020 | ||
2021 | /* If a TLS symbol is accessed using IE at least once, | |
2022 | there is no point to use dynamic model for it. */ | |
2023 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
2024 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
2025 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 2026 | { |
67a4f2b7 | 2027 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 2028 | tls_type = old_tls_type; |
67a4f2b7 AO |
2029 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2030 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2031 | tls_type |= old_tls_type; | |
bffbf940 JJ |
2032 | else |
2033 | { | |
09a24cbf | 2034 | if (h) |
4c544807 L |
2035 | name = h->root.root.string; |
2036 | else | |
2037 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
2038 | isym, NULL); | |
4eca0228 | 2039 | _bfd_error_handler |
695344c0 | 2040 | /* xgettext:c-format */ |
871b3ab2 | 2041 | (_("%pB: '%s' accessed both as normal and" |
63a5468a | 2042 | " thread local symbol"), |
4c544807 | 2043 | abfd, name); |
68c4a57e | 2044 | bfd_set_error (bfd_error_bad_value); |
afd9acee | 2045 | goto error_return; |
bffbf940 JJ |
2046 | } |
2047 | } | |
2048 | ||
2049 | if (old_tls_type != tls_type) | |
2050 | { | |
aec6b87e L |
2051 | if (eh != NULL) |
2052 | eh->tls_type = tls_type; | |
bffbf940 | 2053 | else |
0afcef53 | 2054 | elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
2055 | } |
2056 | } | |
c434dee6 AJ |
2057 | /* Fall through */ |
2058 | ||
d6ab8113 JB |
2059 | case R_X86_64_GOTOFF64: |
2060 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2061 | case R_X86_64_GOTPC64: |
bffbf940 | 2062 | create_got: |
aec6b87e | 2063 | if (eh != NULL) |
98b273dc | 2064 | eh->zero_undefweak &= 0x2; |
70256ad8 AJ |
2065 | break; |
2066 | ||
2067 | case R_X86_64_PLT32: | |
c3320543 | 2068 | case R_X86_64_PLT32_BND: |
70256ad8 | 2069 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
2070 | actually build the entry in adjust_dynamic_symbol, |
2071 | because this might be a case of linking PIC code which is | |
2072 | never referenced by a dynamic object, in which case we | |
2073 | don't need to generate a procedure linkage table entry | |
2074 | after all. */ | |
70256ad8 AJ |
2075 | |
2076 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 2077 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
2078 | if (h == NULL) |
2079 | continue; | |
2080 | ||
98b273dc | 2081 | eh->zero_undefweak &= 0x2; |
f5385ebf | 2082 | h->needs_plt = 1; |
79b0c981 | 2083 | h->plt.refcount = 1; |
70256ad8 AJ |
2084 | break; |
2085 | ||
7b81dfbb AJ |
2086 | case R_X86_64_PLTOFF64: |
2087 | /* This tries to form the 'address' of a function relative | |
2088 | to GOT. For global symbols we need a PLT entry. */ | |
2089 | if (h != NULL) | |
2090 | { | |
2091 | h->needs_plt = 1; | |
79b0c981 | 2092 | h->plt.refcount = 1; |
7b81dfbb AJ |
2093 | } |
2094 | goto create_got; | |
2095 | ||
6a3e1bae L |
2096 | case R_X86_64_SIZE32: |
2097 | case R_X86_64_SIZE64: | |
06a6a421 | 2098 | size_reloc = TRUE; |
6a3e1bae L |
2099 | goto do_size; |
2100 | ||
248775ba L |
2101 | case R_X86_64_32: |
2102 | if (!ABI_64_P (abfd)) | |
2103 | goto pointer; | |
1a0670f3 | 2104 | /* Fall through. */ |
cc78d0af AJ |
2105 | case R_X86_64_8: |
2106 | case R_X86_64_16: | |
70256ad8 | 2107 | case R_X86_64_32S: |
338c190a L |
2108 | /* Check relocation overflow as these relocs may lead to |
2109 | run-time relocation overflow. Don't error out for | |
1b71fb54 | 2110 | sections we don't care about, such as debug sections or |
338c190a | 2111 | when relocation overflow check is disabled. */ |
4c10bbaa | 2112 | if (!info->no_reloc_overflow_check |
6999821f | 2113 | && !converted_reloc |
338c190a L |
2114 | && (bfd_link_pic (info) |
2115 | || (bfd_link_executable (info) | |
2116 | && h != NULL | |
2117 | && !h->def_regular | |
2118 | && h->def_dynamic | |
081b1afe | 2119 | && (sec->flags & SEC_READONLY) == 0))) |
aab921ad | 2120 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2121 | &x86_64_elf_howto_table[r_type]); |
1b71fb54 AJ |
2122 | /* Fall through. */ |
2123 | ||
c434dee6 AJ |
2124 | case R_X86_64_PC8: |
2125 | case R_X86_64_PC16: | |
70256ad8 | 2126 | case R_X86_64_PC32: |
c3320543 | 2127 | case R_X86_64_PC32_BND: |
d6ab8113 | 2128 | case R_X86_64_PC64: |
1b71fb54 | 2129 | case R_X86_64_64: |
248775ba | 2130 | pointer: |
aec6b87e | 2131 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
98b273dc | 2132 | eh->zero_undefweak |= 0x2; |
bf52d7c7 L |
2133 | /* We are called after all symbols have been resolved. Only |
2134 | relocation against STT_GNU_IFUNC symbol must go through | |
2135 | PLT. */ | |
d1ed1c7d L |
2136 | if (h != NULL |
2137 | && (bfd_link_executable (info) | |
bf52d7c7 | 2138 | || h->type == STT_GNU_IFUNC)) |
c434dee6 | 2139 | { |
79b0c981 | 2140 | bfd_boolean func_pointer_ref = FALSE; |
233cc9c1 | 2141 | |
5db4f0d3 L |
2142 | if (r_type == R_X86_64_PC32) |
2143 | { | |
2144 | /* Since something like ".long foo - ." may be used | |
2145 | as pointer, make sure that PLT is used if foo is | |
2146 | a function defined in a shared library. */ | |
2147 | if ((sec->flags & SEC_CODE) == 0) | |
451875b4 L |
2148 | { |
2149 | h->pointer_equality_needed = 1; | |
2150 | if (bfd_link_pie (info) | |
2151 | && h->type == STT_FUNC | |
2152 | && !h->def_regular | |
2153 | && h->def_dynamic) | |
2154 | { | |
2155 | h->needs_plt = 1; | |
2156 | h->plt.refcount = 1; | |
2157 | } | |
2158 | } | |
5db4f0d3 L |
2159 | } |
2160 | else if (r_type != R_X86_64_PC32_BND | |
2161 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
2162 | { |
2163 | h->pointer_equality_needed = 1; | |
2164 | /* At run-time, R_X86_64_64 can be resolved for both | |
2165 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
2166 | can only be resolved for x32. */ | |
2167 | if ((sec->flags & SEC_READONLY) == 0 | |
2168 | && (r_type == R_X86_64_64 | |
2169 | || (!ABI_64_P (abfd) | |
2170 | && (r_type == R_X86_64_32 | |
2171 | || r_type == R_X86_64_32S)))) | |
79b0c981 L |
2172 | func_pointer_ref = TRUE; |
2173 | } | |
2174 | ||
2175 | if (!func_pointer_ref) | |
2176 | { | |
2177 | /* If this reloc is in a read-only section, we might | |
2178 | need a copy reloc. We can't check reliably at this | |
2179 | stage whether the section is read-only, as input | |
2180 | sections have not yet been mapped to output sections. | |
2181 | Tentatively set the flag for now, and correct in | |
2182 | adjust_dynamic_symbol. */ | |
2183 | h->non_got_ref = 1; | |
2184 | ||
2185 | /* We may need a .plt entry if the symbol is a function | |
2186 | defined in a shared lib or is a function referenced | |
2187 | from the code or read-only section. */ | |
2188 | if (!h->def_regular | |
2189 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
2190 | h->plt.refcount = 1; | |
04ebc307 | 2191 | } |
c434dee6 | 2192 | } |
70256ad8 | 2193 | |
06a6a421 | 2194 | size_reloc = FALSE; |
6a3e1bae | 2195 | do_size: |
451875b4 | 2196 | if (NEED_DYNAMIC_RELOCATION_P (info, TRUE, h, sec, r_type, |
daf1c414 | 2197 | htab->pointer_r_type)) |
70256ad8 | 2198 | { |
e03a8ed8 L |
2199 | struct elf_dyn_relocs *p; |
2200 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2201 | |
2202 | /* We must copy these reloc types into the output file. | |
2203 | Create a reloc section in dynobj and make room for | |
2204 | this reloc. */ | |
70256ad8 AJ |
2205 | if (sreloc == NULL) |
2206 | { | |
83bac4b0 | 2207 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
2208 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
2209 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 2210 | |
70256ad8 | 2211 | if (sreloc == NULL) |
afd9acee | 2212 | goto error_return; |
70256ad8 AJ |
2213 | } |
2214 | ||
c434dee6 AJ |
2215 | /* If this is a global symbol, we count the number of |
2216 | relocations we need for this symbol. */ | |
2217 | if (h != NULL) | |
aec6b87e | 2218 | head = &eh->dyn_relocs; |
c434dee6 AJ |
2219 | else |
2220 | { | |
2221 | /* Track dynamic relocs needed for local syms too. | |
2222 | We really need local syms available to do this | |
2223 | easily. Oh well. */ | |
c434dee6 | 2224 | asection *s; |
87d72d41 | 2225 | void **vpp; |
87d72d41 AM |
2226 | |
2227 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2228 | abfd, r_symndx); | |
2229 | if (isym == NULL) | |
afd9acee | 2230 | goto error_return; |
87d72d41 AM |
2231 | |
2232 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2233 | if (s == NULL) |
87d72d41 | 2234 | s = sec; |
70256ad8 | 2235 | |
e81d3500 DD |
2236 | /* Beware of type punned pointers vs strict aliasing |
2237 | rules. */ | |
2238 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2239 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2240 | } |
70256ad8 | 2241 | |
c434dee6 AJ |
2242 | p = *head; |
2243 | if (p == NULL || p->sec != sec) | |
2244 | { | |
2245 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 2246 | |
e03a8ed8 | 2247 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2248 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2249 | if (p == NULL) |
afd9acee | 2250 | goto error_return; |
c434dee6 AJ |
2251 | p->next = *head; |
2252 | *head = p; | |
2253 | p->sec = sec; | |
2254 | p->count = 0; | |
2255 | p->pc_count = 0; | |
70256ad8 | 2256 | } |
c434dee6 AJ |
2257 | |
2258 | p->count += 1; | |
06a6a421 | 2259 | /* Count size relocation as PC-relative relocation. */ |
daf1c414 | 2260 | if (X86_PCREL_TYPE_P (r_type) || size_reloc) |
c434dee6 | 2261 | p->pc_count += 1; |
70256ad8 AJ |
2262 | } |
2263 | break; | |
fe4770f4 AJ |
2264 | |
2265 | /* This relocation describes the C++ object vtable hierarchy. | |
2266 | Reconstruct it for later use during GC. */ | |
2267 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2268 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
afd9acee | 2269 | goto error_return; |
fe4770f4 AJ |
2270 | break; |
2271 | ||
2272 | /* This relocation describes which C++ vtable entries are actually | |
2273 | used. Record for later use during GC. */ | |
2274 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
2275 | BFD_ASSERT (h != NULL); |
2276 | if (h != NULL | |
2277 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
afd9acee | 2278 | goto error_return; |
fe4770f4 | 2279 | break; |
c434dee6 AJ |
2280 | |
2281 | default: | |
2282 | break; | |
70256ad8 AJ |
2283 | } |
2284 | } | |
2285 | ||
bedfd056 L |
2286 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2287 | { | |
5e5e02ae | 2288 | if (!converted && !info->keep_memory) |
bedfd056 L |
2289 | free (contents); |
2290 | else | |
2291 | { | |
5e5e02ae L |
2292 | /* Cache the section contents for elf_link_input_bfd if any |
2293 | load is converted or --no-keep-memory isn't used. */ | |
bedfd056 L |
2294 | elf_section_data (sec)->this_hdr.contents = contents; |
2295 | } | |
2296 | } | |
2297 | ||
5e5e02ae L |
2298 | /* Cache relocations if any load is converted. */ |
2299 | if (elf_section_data (sec)->relocs != relocs && converted) | |
2300 | elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs; | |
2301 | ||
b34976b6 | 2302 | return TRUE; |
afd9acee L |
2303 | |
2304 | error_return: | |
bedfd056 L |
2305 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2306 | free (contents); | |
afd9acee L |
2307 | sec->check_relocs_failed = 1; |
2308 | return FALSE; | |
70256ad8 AJ |
2309 | } |
2310 | ||
bffbf940 JJ |
2311 | /* Return the relocation value for @tpoff relocation |
2312 | if STT_TLS virtual address is ADDRESS. */ | |
2313 | ||
2314 | static bfd_vma | |
351f65ca | 2315 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 2316 | { |
e1918d23 | 2317 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
2318 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
2319 | bfd_vma static_tls_size; | |
bffbf940 JJ |
2320 | |
2321 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 2322 | if (htab->tls_sec == NULL) |
bffbf940 | 2323 | return 0; |
7dc98aea RO |
2324 | |
2325 | /* Consider special static TLS alignment requirements. */ | |
2326 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
2327 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
2328 | } |
2329 | ||
8d88c4ca NC |
2330 | /* Relocate an x86_64 ELF section. */ |
2331 | ||
b34976b6 | 2332 | static bfd_boolean |
351f65ca L |
2333 | elf_x86_64_relocate_section (bfd *output_bfd, |
2334 | struct bfd_link_info *info, | |
2335 | bfd *input_bfd, | |
2336 | asection *input_section, | |
2337 | bfd_byte *contents, | |
2338 | Elf_Internal_Rela *relocs, | |
2339 | Elf_Internal_Sym *local_syms, | |
2340 | asection **local_sections) | |
8d88c4ca | 2341 | { |
0afcef53 | 2342 | struct elf_x86_link_hash_table *htab; |
8d88c4ca NC |
2343 | Elf_Internal_Shdr *symtab_hdr; |
2344 | struct elf_link_hash_entry **sym_hashes; | |
2345 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2346 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 2347 | Elf_Internal_Rela *rel; |
60f2e42e | 2348 | Elf_Internal_Rela *wrel; |
8d88c4ca | 2349 | Elf_Internal_Rela *relend; |
38b12349 | 2350 | unsigned int plt_entry_size; |
8d88c4ca | 2351 | |
338c190a L |
2352 | /* Skip if check_relocs failed. */ |
2353 | if (input_section->check_relocs_failed) | |
2354 | return FALSE; | |
2355 | ||
0afcef53 | 2356 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
2357 | if (htab == NULL) |
2358 | return FALSE; | |
fe53b4a4 L |
2359 | |
2360 | BFD_ASSERT (is_x86_elf (input_bfd, htab)); | |
2361 | ||
765e526c | 2362 | plt_entry_size = htab->plt.plt_entry_size; |
0ffa91dd | 2363 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
2364 | sym_hashes = elf_sym_hashes (input_bfd); |
2365 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
0afcef53 | 2366 | local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 2367 | |
0afcef53 | 2368 | _bfd_x86_elf_set_tls_module_base (info); |
9f03412a | 2369 | |
60f2e42e | 2370 | rel = wrel = relocs; |
8d88c4ca | 2371 | relend = relocs + input_section->reloc_count; |
60f2e42e | 2372 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 2373 | { |
419414ea | 2374 | unsigned int r_type, r_type_tls; |
8d88c4ca NC |
2375 | reloc_howto_type *howto; |
2376 | unsigned long r_symndx; | |
2377 | struct elf_link_hash_entry *h; | |
0afcef53 | 2378 | struct elf_x86_link_hash_entry *eh; |
8d88c4ca NC |
2379 | Elf_Internal_Sym *sym; |
2380 | asection *sec; | |
0ff2b86e | 2381 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 2382 | bfd_vma relocation; |
b34976b6 | 2383 | bfd_boolean unresolved_reloc; |
8d88c4ca | 2384 | bfd_reloc_status_type r; |
bffbf940 | 2385 | int tls_type; |
0ff2b86e | 2386 | asection *base_got, *resolved_plt; |
1788fc08 | 2387 | bfd_vma st_size; |
aec6b87e | 2388 | bfd_boolean resolved_to_zero; |
9e9821dd | 2389 | bfd_boolean relative_reloc; |
78984959 | 2390 | bfd_boolean converted_reloc; |
aebcc8ff | 2391 | bfd_boolean need_copy_reloc_in_pie; |
8d88c4ca | 2392 | |
351f65ca | 2393 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
2394 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
2395 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
2396 | { |
2397 | if (wrel != rel) | |
2398 | *wrel = *rel; | |
2399 | continue; | |
2400 | } | |
8d88c4ca | 2401 | |
78984959 L |
2402 | converted_reloc = (r_type & R_X86_64_converted_reloc_bit) != 0; |
2403 | r_type &= ~R_X86_64_converted_reloc_bit; | |
2404 | ||
9911c0fc | 2405 | if (r_type >= (int) R_X86_64_standard) |
47aeb64c | 2406 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
8d88c4ca | 2407 | |
d7921315 | 2408 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 2409 | || ABI_64_P (output_bfd)) |
d7921315 L |
2410 | howto = x86_64_elf_howto_table + r_type; |
2411 | else | |
2412 | howto = (x86_64_elf_howto_table | |
2413 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 2414 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
2415 | h = NULL; |
2416 | sym = NULL; | |
2417 | sec = NULL; | |
b34976b6 | 2418 | unresolved_reloc = FALSE; |
8d88c4ca | 2419 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
2420 | { |
2421 | sym = local_syms + r_symndx; | |
2422 | sec = local_sections[r_symndx]; | |
c434dee6 | 2423 | |
c25bc9fc L |
2424 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
2425 | &sec, rel); | |
1788fc08 | 2426 | st_size = sym->st_size; |
c25bc9fc L |
2427 | |
2428 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 2429 | if (!bfd_link_relocatable (info) |
351f65ca | 2430 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 2431 | { |
0afcef53 L |
2432 | h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, |
2433 | rel, FALSE); | |
c25bc9fc L |
2434 | if (h == NULL) |
2435 | abort (); | |
2436 | ||
eed180f8 | 2437 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
2438 | h->root.u.def.value = sym->st_value; |
2439 | h->root.u.def.section = sec; | |
2440 | } | |
8da6118f | 2441 | } |
8d88c4ca | 2442 | else |
8da6118f | 2443 | { |
c9736ba0 | 2444 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 2445 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
c434dee6 | 2446 | |
b2a8e766 AM |
2447 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2448 | r_symndx, symtab_hdr, sym_hashes, | |
2449 | h, sec, relocation, | |
62d887d4 | 2450 | unresolved_reloc, warned, ignored); |
1788fc08 | 2451 | st_size = h->size; |
8da6118f | 2452 | } |
ab96bf03 | 2453 | |
dbaa2011 | 2454 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
2455 | { |
2456 | _bfd_clear_contents (howto, input_bfd, input_section, | |
2457 | contents + rel->r_offset); | |
2458 | wrel->r_offset = rel->r_offset; | |
2459 | wrel->r_info = 0; | |
2460 | wrel->r_addend = 0; | |
2461 | ||
2462 | /* For ld -r, remove relocations in debug sections against | |
2463 | sections defined in discarded sections. Not done for | |
2464 | eh_frame editing code expects to be present. */ | |
2465 | if (bfd_link_relocatable (info) | |
2466 | && (input_section->flags & SEC_DEBUGGING)) | |
2467 | wrel--; | |
2468 | ||
2469 | continue; | |
2470 | } | |
ab96bf03 | 2471 | |
0e1862bb | 2472 | if (bfd_link_relocatable (info)) |
2d5da473 L |
2473 | { |
2474 | if (wrel != rel) | |
2475 | *wrel = *rel; | |
2476 | continue; | |
2477 | } | |
ab96bf03 | 2478 | |
1788fc08 | 2479 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 2480 | { |
1788fc08 L |
2481 | if (r_type == R_X86_64_64) |
2482 | { | |
2483 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
2484 | zero-extend it to 64bit if addend is zero. */ | |
2485 | r_type = R_X86_64_32; | |
2486 | memset (contents + rel->r_offset + 4, 0, 4); | |
2487 | } | |
2488 | else if (r_type == R_X86_64_SIZE64) | |
2489 | { | |
2490 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
2491 | zero-extend it to 64bit if addend is zero. */ | |
2492 | r_type = R_X86_64_SIZE32; | |
2493 | memset (contents + rel->r_offset + 4, 0, 4); | |
2494 | } | |
64d25c44 L |
2495 | } |
2496 | ||
0afcef53 | 2497 | eh = (struct elf_x86_link_hash_entry *) h; |
0ff2b86e | 2498 | |
cbe950e9 L |
2499 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
2500 | it here if it is defined in a non-shared object. */ | |
2501 | if (h != NULL | |
2502 | && h->type == STT_GNU_IFUNC | |
2503 | && h->def_regular) | |
2504 | { | |
cbe950e9 | 2505 | bfd_vma plt_index; |
4c544807 | 2506 | const char *name; |
cbe950e9 | 2507 | |
97dc35c8 L |
2508 | if ((input_section->flags & SEC_ALLOC) == 0) |
2509 | { | |
347a8774 L |
2510 | /* If this is a SHT_NOTE section without SHF_ALLOC, treat |
2511 | STT_GNU_IFUNC symbol as STT_FUNC. */ | |
2512 | if (elf_section_type (input_section) == SHT_NOTE) | |
2513 | goto skip_ifunc; | |
97dc35c8 L |
2514 | /* Dynamic relocs are not propagated for SEC_DEBUGGING |
2515 | sections because such sections are not SEC_ALLOC and | |
2516 | thus ld.so will not process them. */ | |
2517 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 2518 | continue; |
97dc35c8 L |
2519 | abort (); |
2520 | } | |
233cc9c1 L |
2521 | |
2522 | switch (r_type) | |
2523 | { | |
2524 | default: | |
2525 | break; | |
2526 | ||
2527 | case R_X86_64_GOTPCREL: | |
2528 | case R_X86_64_GOTPCRELX: | |
2529 | case R_X86_64_REX_GOTPCRELX: | |
2530 | case R_X86_64_GOTPCREL64: | |
2531 | base_got = htab->elf.sgot; | |
2532 | off = h->got.offset; | |
2533 | ||
2534 | if (base_got == NULL) | |
2535 | abort (); | |
2536 | ||
2537 | if (off == (bfd_vma) -1) | |
2538 | { | |
2539 | /* We can't use h->got.offset here to save state, or | |
2540 | even just remember the offset, as finish_dynamic_symbol | |
2541 | would use that as offset into .got. */ | |
2542 | ||
2543 | if (h->plt.offset == (bfd_vma) -1) | |
2544 | abort (); | |
2545 | ||
2546 | if (htab->elf.splt != NULL) | |
2547 | { | |
38b12349 | 2548 | plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2549 | - htab->plt.has_plt0); |
233cc9c1 L |
2550 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
2551 | base_got = htab->elf.sgotplt; | |
2552 | } | |
2553 | else | |
2554 | { | |
2555 | plt_index = h->plt.offset / plt_entry_size; | |
2556 | off = plt_index * GOT_ENTRY_SIZE; | |
2557 | base_got = htab->elf.igotplt; | |
2558 | } | |
2559 | ||
2560 | if (h->dynindx == -1 | |
2561 | || h->forced_local | |
2562 | || info->symbolic) | |
2563 | { | |
2564 | /* This references the local defitionion. We must | |
2565 | initialize this entry in the global offset table. | |
2566 | Since the offset must always be a multiple of 8, | |
2567 | we use the least significant bit to record | |
2568 | whether we have initialized it already. | |
2569 | ||
2570 | When doing a dynamic link, we create a .rela.got | |
2571 | relocation entry to initialize the value. This | |
2572 | is done in the finish_dynamic_symbol routine. */ | |
2573 | if ((off & 1) != 0) | |
2574 | off &= ~1; | |
2575 | else | |
2576 | { | |
2577 | bfd_put_64 (output_bfd, relocation, | |
2578 | base_got->contents + off); | |
2579 | /* Note that this is harmless for the GOTPLT64 | |
2580 | case, as -1 | 1 still is -1. */ | |
2581 | h->got.offset |= 1; | |
2582 | } | |
2583 | } | |
2584 | } | |
2585 | ||
2586 | relocation = (base_got->output_section->vma | |
2587 | + base_got->output_offset + off); | |
2588 | ||
2589 | goto do_relocation; | |
2590 | } | |
2591 | ||
2592 | if (h->plt.offset == (bfd_vma) -1) | |
2593 | { | |
2594 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
2595 | if (r_type == htab->pointer_r_type | |
2596 | && (input_section->flags & SEC_CODE) == 0) | |
2597 | goto do_ifunc_pointer; | |
2598 | goto bad_ifunc_reloc; | |
2599 | } | |
cbe950e9 L |
2600 | |
2601 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
2602 | if (htab->elf.splt != NULL) |
2603 | { | |
f2c29a16 | 2604 | if (htab->plt_second != NULL) |
0ff2b86e | 2605 | { |
f2c29a16 L |
2606 | resolved_plt = htab->plt_second; |
2607 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
2608 | } |
2609 | else | |
2610 | { | |
2611 | resolved_plt = htab->elf.splt; | |
2612 | plt_offset = h->plt.offset; | |
2613 | } | |
2614 | } | |
2615 | else | |
2616 | { | |
2617 | resolved_plt = htab->elf.iplt; | |
2618 | plt_offset = h->plt.offset; | |
2619 | } | |
2620 | ||
2621 | relocation = (resolved_plt->output_section->vma | |
2622 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
2623 | |
2624 | switch (r_type) | |
2625 | { | |
2626 | default: | |
233cc9c1 | 2627 | bad_ifunc_reloc: |
4c544807 L |
2628 | if (h->root.root.string) |
2629 | name = h->root.root.string; | |
2630 | else | |
2631 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
2632 | NULL); | |
4eca0228 | 2633 | _bfd_error_handler |
695344c0 | 2634 | /* xgettext:c-format */ |
871b3ab2 | 2635 | (_("%pB: relocation %s against STT_GNU_IFUNC " |
233cc9c1 L |
2636 | "symbol `%s' isn't supported"), input_bfd, |
2637 | howto->name, name); | |
cbe950e9 L |
2638 | bfd_set_error (bfd_error_bad_value); |
2639 | return FALSE; | |
2640 | ||
2641 | case R_X86_64_32S: | |
0e1862bb | 2642 | if (bfd_link_pic (info)) |
cbe950e9 | 2643 | abort (); |
710ab287 L |
2644 | goto do_relocation; |
2645 | ||
248775ba L |
2646 | case R_X86_64_32: |
2647 | if (ABI_64_P (output_bfd)) | |
2648 | goto do_relocation; | |
17672001 | 2649 | /* FALLTHROUGH */ |
eed180f8 | 2650 | case R_X86_64_64: |
233cc9c1 | 2651 | do_ifunc_pointer: |
710ab287 L |
2652 | if (rel->r_addend != 0) |
2653 | { | |
4c544807 L |
2654 | if (h->root.root.string) |
2655 | name = h->root.root.string; | |
2656 | else | |
2657 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
2658 | sym, NULL); | |
4eca0228 | 2659 | _bfd_error_handler |
695344c0 | 2660 | /* xgettext:c-format */ |
871b3ab2 | 2661 | (_("%pB: relocation %s against STT_GNU_IFUNC " |
2dcf00ce AM |
2662 | "symbol `%s' has non-zero addend: %" PRId64), |
2663 | input_bfd, howto->name, name, (int64_t) rel->r_addend); | |
710ab287 L |
2664 | bfd_set_error (bfd_error_bad_value); |
2665 | return FALSE; | |
2666 | } | |
2667 | ||
2668 | /* Generate dynamic relcoation only when there is a | |
233cc9c1 L |
2669 | non-GOT reference in a shared object or there is no |
2670 | PLT. */ | |
2671 | if ((bfd_link_pic (info) && h->non_got_ref) | |
2672 | || h->plt.offset == (bfd_vma) -1) | |
710ab287 L |
2673 | { |
2674 | Elf_Internal_Rela outrel; | |
710ab287 L |
2675 | asection *sreloc; |
2676 | ||
c25bc9fc L |
2677 | /* Need a dynamic relocation to get the real function |
2678 | address. */ | |
710ab287 L |
2679 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
2680 | info, | |
2681 | input_section, | |
2682 | rel->r_offset); | |
2683 | if (outrel.r_offset == (bfd_vma) -1 | |
2684 | || outrel.r_offset == (bfd_vma) -2) | |
2685 | abort (); | |
2686 | ||
2687 | outrel.r_offset += (input_section->output_section->vma | |
2688 | + input_section->output_offset); | |
2689 | ||
cf1070f1 | 2690 | if (POINTER_LOCAL_IFUNC_P (info, h)) |
710ab287 | 2691 | { |
871b3ab2 | 2692 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
2693 | h->root.root.string, |
2694 | h->root.u.def.section->owner); | |
2695 | ||
710ab287 | 2696 | /* This symbol is resolved locally. */ |
56b8aada L |
2697 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
2698 | outrel.r_addend = (h->root.u.def.value | |
2699 | + h->root.u.def.section->output_section->vma | |
2700 | + h->root.u.def.section->output_offset); | |
710ab287 L |
2701 | } |
2702 | else | |
2703 | { | |
351f65ca | 2704 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
2705 | outrel.r_addend = 0; |
2706 | } | |
2707 | ||
233cc9c1 L |
2708 | /* Dynamic relocations are stored in |
2709 | 1. .rela.ifunc section in PIC object. | |
2710 | 2. .rela.got section in dynamic executable. | |
2711 | 3. .rela.iplt section in static executable. */ | |
2712 | if (bfd_link_pic (info)) | |
2713 | sreloc = htab->elf.irelifunc; | |
2714 | else if (htab->elf.splt != NULL) | |
2715 | sreloc = htab->elf.srelgot; | |
2716 | else | |
2717 | sreloc = htab->elf.irelplt; | |
351f65ca | 2718 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
2719 | |
2720 | /* If this reloc is against an external symbol, we | |
2721 | do not want to fiddle with the addend. Otherwise, | |
2722 | we need to include the symbol value so that it | |
2723 | becomes an addend for the dynamic reloc. For an | |
2724 | internal symbol, we have updated addend. */ | |
56b8aada | 2725 | continue; |
710ab287 | 2726 | } |
17672001 | 2727 | /* FALLTHROUGH */ |
cbe950e9 | 2728 | case R_X86_64_PC32: |
c3320543 | 2729 | case R_X86_64_PC32_BND: |
cbe950e9 L |
2730 | case R_X86_64_PC64: |
2731 | case R_X86_64_PLT32: | |
c3320543 | 2732 | case R_X86_64_PLT32_BND: |
cbe950e9 | 2733 | goto do_relocation; |
cbe950e9 L |
2734 | } |
2735 | } | |
2736 | ||
347a8774 | 2737 | skip_ifunc: |
aec6b87e | 2738 | resolved_to_zero = (eh != NULL |
c5bce5c6 | 2739 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh)); |
aec6b87e | 2740 | |
70256ad8 AJ |
2741 | /* When generating a shared object, the relocations handled here are |
2742 | copied into the output file to be resolved at run time. */ | |
2743 | switch (r_type) | |
2744 | { | |
2745 | case R_X86_64_GOT32: | |
7b81dfbb | 2746 | case R_X86_64_GOT64: |
70256ad8 AJ |
2747 | /* Relocation is to the entry for this symbol in the global |
2748 | offset table. */ | |
70256ad8 | 2749 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
2750 | case R_X86_64_GOTPCRELX: |
2751 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
2752 | case R_X86_64_GOTPCREL64: |
2753 | /* Use global offset table entry as symbol value. */ | |
2754 | case R_X86_64_GOTPLT64: | |
de194d85 | 2755 | /* This is obsolete and treated the same as GOT64. */ |
6de2ae4a | 2756 | base_got = htab->elf.sgot; |
7b81dfbb | 2757 | |
6de2ae4a | 2758 | if (htab->elf.sgot == NULL) |
c434dee6 | 2759 | abort (); |
053579d7 | 2760 | |
9e9821dd | 2761 | relative_reloc = FALSE; |
51e0a107 | 2762 | if (h != NULL) |
70256ad8 | 2763 | { |
c434dee6 | 2764 | off = h->got.offset; |
7b81dfbb | 2765 | if (h->needs_plt |
eed180f8 | 2766 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
2767 | && off == (bfd_vma)-1) |
2768 | { | |
2769 | /* We can't use h->got.offset here to save | |
2770 | state, or even just remember the offset, as | |
2771 | finish_dynamic_symbol would use that as offset into | |
2772 | .got. */ | |
38b12349 | 2773 | bfd_vma plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2774 | - htab->plt.has_plt0); |
7b81dfbb | 2775 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 2776 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
2777 | } |
2778 | ||
2eba97c2 | 2779 | if (RESOLVED_LOCALLY_P (info, h, htab)) |
51e0a107 | 2780 | { |
2eba97c2 L |
2781 | /* We must initialize this entry in the global offset |
2782 | table. Since the offset must always be a multiple | |
2783 | of 8, we use the least significant bit to record | |
2784 | whether we have initialized it already. | |
51e0a107 JH |
2785 | |
2786 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
2787 | relocation entry to initialize the value. This is |
2788 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
2789 | if ((off & 1) != 0) |
2790 | off &= ~1; | |
2791 | else | |
2792 | { | |
2793 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
2794 | base_got->contents + off); |
2795 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 2796 | as -1 | 1 still is -1. */ |
51e0a107 | 2797 | h->got.offset |= 1; |
9e9821dd | 2798 | |
f70656b2 | 2799 | if (GENERATE_RELATIVE_RELOC_P (info, h)) |
9e9821dd L |
2800 | { |
2801 | /* If this symbol isn't dynamic in PIC, | |
2802 | generate R_X86_64_RELATIVE here. */ | |
2803 | eh->no_finish_dynamic_symbol = 1; | |
2804 | relative_reloc = TRUE; | |
2805 | } | |
51e0a107 JH |
2806 | } |
2807 | } | |
053579d7 | 2808 | else |
b34976b6 | 2809 | unresolved_reloc = FALSE; |
70256ad8 | 2810 | } |
51e0a107 JH |
2811 | else |
2812 | { | |
c434dee6 AJ |
2813 | if (local_got_offsets == NULL) |
2814 | abort (); | |
51e0a107 JH |
2815 | |
2816 | off = local_got_offsets[r_symndx]; | |
2817 | ||
2818 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
2819 | the least significant bit to record whether we have |
2820 | already generated the necessary reloc. */ | |
51e0a107 JH |
2821 | if ((off & 1) != 0) |
2822 | off &= ~1; | |
2823 | else | |
2824 | { | |
c434dee6 | 2825 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 2826 | base_got->contents + off); |
9e9821dd | 2827 | local_got_offsets[r_symndx] |= 1; |
51e0a107 | 2828 | |
0e1862bb | 2829 | if (bfd_link_pic (info)) |
9e9821dd | 2830 | relative_reloc = TRUE; |
51e0a107 | 2831 | } |
51e0a107 | 2832 | } |
6a2bda3f | 2833 | |
9e9821dd L |
2834 | if (relative_reloc) |
2835 | { | |
2836 | asection *s; | |
2837 | Elf_Internal_Rela outrel; | |
2838 | ||
2839 | /* We need to generate a R_X86_64_RELATIVE reloc | |
2840 | for the dynamic linker. */ | |
2841 | s = htab->elf.srelgot; | |
2842 | if (s == NULL) | |
2843 | abort (); | |
2844 | ||
2845 | outrel.r_offset = (base_got->output_section->vma | |
2846 | + base_got->output_offset | |
2847 | + off); | |
2848 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); | |
2849 | outrel.r_addend = relocation; | |
2850 | elf_append_rela (output_bfd, s, &outrel); | |
2851 | } | |
2852 | ||
c434dee6 AJ |
2853 | if (off >= (bfd_vma) -2) |
2854 | abort (); | |
2855 | ||
7b81dfbb AJ |
2856 | relocation = base_got->output_section->vma |
2857 | + base_got->output_offset + off; | |
56ceb5b5 L |
2858 | if (r_type != R_X86_64_GOTPCREL |
2859 | && r_type != R_X86_64_GOTPCRELX | |
2860 | && r_type != R_X86_64_REX_GOTPCRELX | |
2861 | && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
2862 | relocation -= htab->elf.sgotplt->output_section->vma |
2863 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 2864 | |
70256ad8 AJ |
2865 | break; |
2866 | ||
d6ab8113 JB |
2867 | case R_X86_64_GOTOFF64: |
2868 | /* Relocation is relative to the start of the global offset | |
2869 | table. */ | |
2870 | ||
3d949995 L |
2871 | /* Check to make sure it isn't a protected function or data |
2872 | symbol for shared library since it may not be local when | |
e3c0e327 L |
2873 | used as function address or with copy relocation. We also |
2874 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 2875 | if (bfd_link_pic (info) && h) |
d6ab8113 | 2876 | { |
e3c0e327 L |
2877 | if (!h->def_regular) |
2878 | { | |
2879 | const char *v; | |
2880 | ||
2881 | switch (ELF_ST_VISIBILITY (h->other)) | |
2882 | { | |
2883 | case STV_HIDDEN: | |
2884 | v = _("hidden symbol"); | |
2885 | break; | |
2886 | case STV_INTERNAL: | |
2887 | v = _("internal symbol"); | |
2888 | break; | |
2889 | case STV_PROTECTED: | |
2890 | v = _("protected symbol"); | |
2891 | break; | |
2892 | default: | |
2893 | v = _("symbol"); | |
2894 | break; | |
2895 | } | |
2896 | ||
4eca0228 | 2897 | _bfd_error_handler |
695344c0 | 2898 | /* xgettext:c-format */ |
871b3ab2 | 2899 | (_("%pB: relocation R_X86_64_GOTOFF64 against undefined %s" |
63a5468a | 2900 | " `%s' can not be used when making a shared object"), |
e3c0e327 L |
2901 | input_bfd, v, h->root.root.string); |
2902 | bfd_set_error (bfd_error_bad_value); | |
2903 | return FALSE; | |
2904 | } | |
0e1862bb | 2905 | else if (!bfd_link_executable (info) |
6999821f | 2906 | && !SYMBOL_REFERENCES_LOCAL_P (info, h) |
e3c0e327 L |
2907 | && (h->type == STT_FUNC |
2908 | || h->type == STT_OBJECT) | |
2909 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
2910 | { | |
4eca0228 | 2911 | _bfd_error_handler |
695344c0 | 2912 | /* xgettext:c-format */ |
871b3ab2 | 2913 | (_("%pB: relocation R_X86_64_GOTOFF64 against protected %s" |
63a5468a | 2914 | " `%s' can not be used when making a shared object"), |
e3c0e327 L |
2915 | input_bfd, |
2916 | h->type == STT_FUNC ? "function" : "data", | |
2917 | h->root.root.string); | |
2918 | bfd_set_error (bfd_error_bad_value); | |
d6ab8113 | 2919 | return FALSE; |
e3c0e327 | 2920 | } |
d6ab8113 JB |
2921 | } |
2922 | ||
2923 | /* Note that sgot is not involved in this | |
2924 | calculation. We always want the start of .got.plt. If we | |
2925 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
2926 | permitted by the ABI, we might have to change this | |
2927 | calculation. */ | |
6de2ae4a L |
2928 | relocation -= htab->elf.sgotplt->output_section->vma |
2929 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
2930 | break; |
2931 | ||
2932 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2933 | case R_X86_64_GOTPC64: |
d6ab8113 | 2934 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
2935 | relocation = htab->elf.sgotplt->output_section->vma |
2936 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
2937 | unresolved_reloc = FALSE; |
2938 | break; | |
7b81dfbb AJ |
2939 | |
2940 | case R_X86_64_PLTOFF64: | |
2941 | /* Relocation is PLT entry relative to GOT. For local | |
2942 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 2943 | if (h != NULL |
7b81dfbb | 2944 | /* See PLT32 handling. */ |
9d734efa L |
2945 | && (h->plt.offset != (bfd_vma) -1 |
2946 | || eh->plt_got.offset != (bfd_vma) -1) | |
6de2ae4a | 2947 | && htab->elf.splt != NULL) |
7b81dfbb | 2948 | { |
9d734efa L |
2949 | if (eh->plt_got.offset != (bfd_vma) -1) |
2950 | { | |
2951 | /* Use the GOT PLT. */ | |
2952 | resolved_plt = htab->plt_got; | |
2953 | plt_offset = eh->plt_got.offset; | |
2954 | } | |
f2c29a16 | 2955 | else if (htab->plt_second != NULL) |
0ff2b86e | 2956 | { |
f2c29a16 L |
2957 | resolved_plt = htab->plt_second; |
2958 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
2959 | } |
2960 | else | |
2961 | { | |
2962 | resolved_plt = htab->elf.splt; | |
2963 | plt_offset = h->plt.offset; | |
2964 | } | |
2965 | ||
2966 | relocation = (resolved_plt->output_section->vma | |
2967 | + resolved_plt->output_offset | |
2968 | + plt_offset); | |
7b81dfbb AJ |
2969 | unresolved_reloc = FALSE; |
2970 | } | |
2971 | ||
6de2ae4a L |
2972 | relocation -= htab->elf.sgotplt->output_section->vma |
2973 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 2974 | break; |
d6ab8113 | 2975 | |
70256ad8 | 2976 | case R_X86_64_PLT32: |
c3320543 | 2977 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
2978 | /* Relocation is to the entry for this symbol in the |
2979 | procedure linkage table. */ | |
2980 | ||
2981 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 2982 | without using the procedure linkage table. */ |
70256ad8 AJ |
2983 | if (h == NULL) |
2984 | break; | |
2985 | ||
dd7e64d4 L |
2986 | if ((h->plt.offset == (bfd_vma) -1 |
2987 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 2988 | || htab->elf.splt == NULL) |
70256ad8 AJ |
2989 | { |
2990 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
2991 | happens when statically linking PIC code, or when |
2992 | using -Bsymbolic. */ | |
70256ad8 AJ |
2993 | break; |
2994 | } | |
2995 | ||
451875b4 | 2996 | use_plt: |
dd7e64d4 | 2997 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 2998 | { |
f2c29a16 | 2999 | if (htab->plt_second != NULL) |
dd7e64d4 | 3000 | { |
f2c29a16 L |
3001 | resolved_plt = htab->plt_second; |
3002 | plt_offset = eh->plt_second.offset; | |
dd7e64d4 L |
3003 | } |
3004 | else | |
3005 | { | |
3006 | resolved_plt = htab->elf.splt; | |
3007 | plt_offset = h->plt.offset; | |
3008 | } | |
0ff2b86e L |
3009 | } |
3010 | else | |
3011 | { | |
dd7e64d4 L |
3012 | /* Use the GOT PLT. */ |
3013 | resolved_plt = htab->plt_got; | |
3014 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
3015 | } |
3016 | ||
3017 | relocation = (resolved_plt->output_section->vma | |
3018 | + resolved_plt->output_offset | |
3019 | + plt_offset); | |
b34976b6 | 3020 | unresolved_reloc = FALSE; |
70256ad8 AJ |
3021 | break; |
3022 | ||
1788fc08 L |
3023 | case R_X86_64_SIZE32: |
3024 | case R_X86_64_SIZE64: | |
1788fc08 L |
3025 | /* Set to symbol size. */ |
3026 | relocation = st_size; | |
3027 | goto direct; | |
3028 | ||
fd8ab9e5 AJ |
3029 | case R_X86_64_PC8: |
3030 | case R_X86_64_PC16: | |
3031 | case R_X86_64_PC32: | |
c3320543 | 3032 | case R_X86_64_PC32_BND: |
6333bc0d | 3033 | /* Don't complain about -fPIC if the symbol is undefined when |
bd7ab16b L |
3034 | building executable unless it is unresolved weak symbol, |
3035 | references a dynamic definition in PIE or -z nocopyreloc | |
3036 | is used. */ | |
07d6d2b8 | 3037 | if ((input_section->flags & SEC_ALLOC) != 0 |
90f487df | 3038 | && (input_section->flags & SEC_READONLY) != 0 |
6333bc0d | 3039 | && h != NULL |
aec6b87e | 3040 | && ((bfd_link_executable (info) |
7073b5b9 L |
3041 | && ((h->root.type == bfd_link_hash_undefweak |
3042 | && !resolved_to_zero) | |
bd7ab16b L |
3043 | || (bfd_link_pie (info) |
3044 | && !h->def_regular | |
3045 | && h->def_dynamic) | |
a5b4ee94 L |
3046 | || ((info->nocopyreloc |
3047 | || (eh->def_protected | |
3048 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
3049 | && h->def_dynamic |
3050 | && !(h->root.u.def.section->flags & SEC_CODE)))) | |
c5bb8910 | 3051 | || bfd_link_dll (info))) |
6610a52d | 3052 | { |
41bed6dd | 3053 | bfd_boolean fail = FALSE; |
6999821f | 3054 | if (SYMBOL_REFERENCES_LOCAL_P (info, h)) |
41bed6dd L |
3055 | { |
3056 | /* Symbol is referenced locally. Make sure it is | |
bd7ab16b L |
3057 | defined locally. */ |
3058 | fail = !(h->def_regular || ELF_COMMON_DEF_P (h)); | |
41bed6dd | 3059 | } |
aec6b87e | 3060 | else if (!(bfd_link_pie (info) |
bc696fd5 | 3061 | && (h->needs_copy || eh->needs_copy))) |
41bed6dd | 3062 | { |
9a926d55 | 3063 | /* Symbol doesn't need copy reloc and isn't referenced |
bd7ab16b L |
3064 | locally. Address of protected function may not be |
3065 | reachable at run-time. */ | |
3066 | fail = (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3067 | || (ELF_ST_VISIBILITY (h->other) == STV_PROTECTED | |
3068 | && h->type == STT_FUNC)); | |
41bed6dd L |
3069 | } |
3070 | ||
3071 | if (fail) | |
aab921ad | 3072 | return elf_x86_64_need_pic (info, input_bfd, input_section, |
338c190a | 3073 | h, NULL, NULL, howto); |
6610a52d | 3074 | } |
451875b4 L |
3075 | /* Since x86-64 has PC-relative PLT, we can use PLT in PIE |
3076 | as function address. */ | |
3077 | else if (h != NULL | |
3078 | && (input_section->flags & SEC_CODE) == 0 | |
3079 | && bfd_link_pie (info) | |
3080 | && h->type == STT_FUNC | |
3081 | && !h->def_regular | |
3082 | && h->def_dynamic) | |
3083 | goto use_plt; | |
6610a52d L |
3084 | /* Fall through. */ |
3085 | ||
70256ad8 AJ |
3086 | case R_X86_64_8: |
3087 | case R_X86_64_16: | |
3088 | case R_X86_64_32: | |
d6ab8113 | 3089 | case R_X86_64_PC64: |
6b3db546 | 3090 | case R_X86_64_64: |
80643fbc | 3091 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 3092 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 3093 | |
1788fc08 | 3094 | direct: |
b1e24c02 | 3095 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
3096 | break; |
3097 | ||
aebcc8ff L |
3098 | need_copy_reloc_in_pie = (bfd_link_pie (info) |
3099 | && h != NULL | |
3100 | && (h->needs_copy | |
3101 | || eh->needs_copy | |
3102 | || (h->root.type | |
3103 | == bfd_link_hash_undefined)) | |
3104 | && (X86_PCREL_TYPE_P (r_type) | |
3105 | || X86_SIZE_TYPE_P (r_type))); | |
3106 | ||
3107 | if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type, | |
3108 | need_copy_reloc_in_pie, | |
3109 | resolved_to_zero, FALSE)) | |
70256ad8 AJ |
3110 | { |
3111 | Elf_Internal_Rela outrel; | |
b34976b6 | 3112 | bfd_boolean skip, relocate; |
c434dee6 | 3113 | asection *sreloc; |
70256ad8 AJ |
3114 | |
3115 | /* When generating a shared object, these relocations | |
3116 | are copied into the output file to be resolved at run | |
407443a3 | 3117 | time. */ |
b34976b6 AM |
3118 | skip = FALSE; |
3119 | relocate = FALSE; | |
70256ad8 | 3120 | |
c629eae0 JJ |
3121 | outrel.r_offset = |
3122 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 3123 | rel->r_offset); |
c629eae0 | 3124 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 3125 | skip = TRUE; |
0fb19cbc | 3126 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 3127 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
3128 | |
3129 | outrel.r_offset += (input_section->output_section->vma | |
3130 | + input_section->output_offset); | |
3131 | ||
3132 | if (skip) | |
0bb2d96a | 3133 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 3134 | |
e74399c4 | 3135 | else if (COPY_INPUT_RELOC_P (info, h, r_type)) |
70256ad8 | 3136 | { |
351f65ca | 3137 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 3138 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
3139 | } |
3140 | else | |
3141 | { | |
4c10bbaa L |
3142 | /* This symbol is local, or marked to become local. |
3143 | When relocation overflow check is disabled, we | |
3144 | convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
3145 | if (r_type == htab->pointer_r_type | |
3146 | || (r_type == R_X86_64_32 | |
3147 | && info->no_reloc_overflow_check)) | |
607c0e09 | 3148 | { |
b34976b6 | 3149 | relocate = TRUE; |
351f65ca | 3150 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
3151 | outrel.r_addend = relocation + rel->r_addend; |
3152 | } | |
64d25c44 L |
3153 | else if (r_type == R_X86_64_64 |
3154 | && !ABI_64_P (output_bfd)) | |
3155 | { | |
3156 | relocate = TRUE; | |
3157 | outrel.r_info = htab->r_info (0, | |
3158 | R_X86_64_RELATIVE64); | |
3159 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
3160 | /* Check addend overflow. */ |
3161 | if ((outrel.r_addend & 0x80000000) | |
3162 | != (rel->r_addend & 0x80000000)) | |
3163 | { | |
3164 | const char *name; | |
268a8d3a | 3165 | int addend = rel->r_addend; |
8cf0d2dd L |
3166 | if (h && h->root.root.string) |
3167 | name = h->root.root.string; | |
3168 | else | |
3169 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3170 | sym, NULL); | |
d42c267e AM |
3171 | _bfd_error_handler |
3172 | /* xgettext:c-format */ | |
871b3ab2 | 3173 | (_("%pB: addend %s%#x in relocation %s against " |
2dcf00ce AM |
3174 | "symbol `%s' at %#" PRIx64 |
3175 | " in section `%pA' is out of range"), | |
d42c267e | 3176 | input_bfd, addend < 0 ? "-" : "", addend, |
2dcf00ce AM |
3177 | howto->name, name, (uint64_t) rel->r_offset, |
3178 | input_section); | |
8cf0d2dd L |
3179 | bfd_set_error (bfd_error_bad_value); |
3180 | return FALSE; | |
3181 | } | |
64d25c44 | 3182 | } |
607c0e09 AS |
3183 | else |
3184 | { | |
3185 | long sindx; | |
3186 | ||
8517fae7 | 3187 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
3188 | sindx = 0; |
3189 | else if (sec == NULL || sec->owner == NULL) | |
3190 | { | |
3191 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3192 | return FALSE; |
607c0e09 AS |
3193 | } |
3194 | else | |
3195 | { | |
3196 | asection *osec; | |
3197 | ||
74541ad4 AM |
3198 | /* We are turning this relocation into one |
3199 | against a section symbol. It would be | |
3200 | proper to subtract the symbol's value, | |
3201 | osec->vma, from the emitted reloc addend, | |
3202 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
3203 | osec = sec->output_section; |
3204 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
3205 | if (sindx == 0) |
3206 | { | |
3207 | asection *oi = htab->elf.text_index_section; | |
3208 | sindx = elf_section_data (oi)->dynindx; | |
3209 | } | |
3210 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
3211 | } |
3212 | ||
351f65ca | 3213 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
3214 | outrel.r_addend = relocation + rel->r_addend; |
3215 | } | |
70256ad8 AJ |
3216 | } |
3217 | ||
cbe950e9 | 3218 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 3219 | |
62d78908 L |
3220 | if (sreloc == NULL || sreloc->contents == NULL) |
3221 | { | |
3222 | r = bfd_reloc_notsupported; | |
3223 | goto check_relocation_error; | |
3224 | } | |
c434dee6 | 3225 | |
351f65ca | 3226 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
3227 | |
3228 | /* If this reloc is against an external symbol, we do | |
3229 | not want to fiddle with the addend. Otherwise, we | |
3230 | need to include the symbol value so that it becomes | |
3231 | an addend for the dynamic reloc. */ | |
0f88be7a | 3232 | if (! relocate) |
70256ad8 AJ |
3233 | continue; |
3234 | } | |
3235 | ||
3236 | break; | |
3237 | ||
bffbf940 | 3238 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
3239 | case R_X86_64_GOTPC32_TLSDESC: |
3240 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 3241 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
3242 | tls_type = GOT_UNKNOWN; |
3243 | if (h == NULL && local_got_offsets) | |
0afcef53 | 3244 | tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 3245 | else if (h != NULL) |
0afcef53 | 3246 | tls_type = elf_x86_hash_entry (h)->tls_type; |
142411ca | 3247 | |
419414ea | 3248 | r_type_tls = r_type; |
351f65ca L |
3249 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3250 | input_section, contents, | |
3251 | symtab_hdr, sym_hashes, | |
419414ea | 3252 | &r_type_tls, tls_type, rel, |
bedfd056 | 3253 | relend, h, r_symndx, TRUE)) |
534a31f6 | 3254 | return FALSE; |
bffbf940 | 3255 | |
419414ea | 3256 | if (r_type_tls == R_X86_64_TPOFF32) |
bffbf940 | 3257 | { |
142411ca L |
3258 | bfd_vma roff = rel->r_offset; |
3259 | ||
bffbf940 | 3260 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 3261 | |
419414ea | 3262 | if (r_type == R_X86_64_TLSGD) |
bffbf940 | 3263 | { |
52bc799a | 3264 | /* GD->LE transition. For 64bit, change |
e2cbcd91 L |
3265 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3266 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3267 | or | |
3268 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3269 | .byte 0x66; rex64 | |
3270 | call *__tls_get_addr@GOTPCREL(%rip) | |
3271 | which may be converted to | |
3272 | addr32 call __tls_get_addr | |
52bc799a | 3273 | into: |
e2cbcd91 L |
3274 | movq %fs:0, %rax |
3275 | leaq foo@tpoff(%rax), %rax | |
52bc799a | 3276 | For 32bit, change |
e2cbcd91 L |
3277 | leaq foo@tlsgd(%rip), %rdi |
3278 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3279 | or | |
3280 | leaq foo@tlsgd(%rip), %rdi | |
3281 | .byte 0x66; rex64 | |
3282 | call *__tls_get_addr@GOTPCREL(%rip) | |
3283 | which may be converted to | |
3284 | addr32 call __tls_get_addr | |
52bc799a | 3285 | into: |
e2cbcd91 L |
3286 | movl %fs:0, %eax |
3287 | leaq foo@tpoff(%rax), %rax | |
5c98a14e | 3288 | For largepic, change: |
e2cbcd91 L |
3289 | leaq foo@tlsgd(%rip), %rdi |
3290 | movabsq $__tls_get_addr@pltoff, %rax | |
3291 | addq %r15, %rax | |
3292 | call *%rax | |
5c98a14e | 3293 | into: |
e2cbcd91 L |
3294 | movq %fs:0, %rax |
3295 | leaq foo@tpoff(%rax), %rax | |
3296 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 3297 | int largepic = 0; |
e2cbcd91 | 3298 | if (ABI_64_P (output_bfd)) |
5c98a14e | 3299 | { |
e2cbcd91 L |
3300 | if (contents[roff + 5] == 0xb8) |
3301 | { | |
3302 | memcpy (contents + roff - 3, | |
3303 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
3304 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
3305 | largepic = 1; | |
3306 | } | |
3307 | else | |
3308 | memcpy (contents + roff - 4, | |
3309 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3310 | 16); | |
5c98a14e | 3311 | } |
52bc799a L |
3312 | else |
3313 | memcpy (contents + roff - 3, | |
3314 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3315 | 15); | |
eb4ff4d6 | 3316 | bfd_put_32 (output_bfd, |
351f65ca | 3317 | elf_x86_64_tpoff (info, relocation), |
5c98a14e | 3318 | contents + roff + 8 + largepic); |
e2cbcd91 L |
3319 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, |
3320 | R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */ | |
bffbf940 | 3321 | rel++; |
60f2e42e | 3322 | wrel++; |
bffbf940 JJ |
3323 | continue; |
3324 | } | |
419414ea | 3325 | else if (r_type == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
3326 | { |
3327 | /* GDesc -> LE transition. | |
3328 | It's originally something like: | |
3329 | leaq x@tlsdesc(%rip), %rax | |
3330 | ||
3331 | Change it to: | |
c9736ba0 | 3332 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 3333 | |
c9736ba0 | 3334 | unsigned int val, type; |
67a4f2b7 | 3335 | |
67a4f2b7 | 3336 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 3337 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
3338 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
3339 | contents + roff - 3); | |
3340 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
3341 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3342 | contents + roff - 1); | |
eb4ff4d6 | 3343 | bfd_put_32 (output_bfd, |
351f65ca | 3344 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
3345 | contents + roff); |
3346 | continue; | |
3347 | } | |
419414ea | 3348 | else if (r_type == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
3349 | { |
3350 | /* GDesc -> LE transition. | |
3351 | It's originally: | |
3352 | call *(%rax) | |
3353 | Turn it into: | |
142411ca | 3354 | xchg %ax,%ax. */ |
10efb593 | 3355 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
3356 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3357 | continue; | |
3358 | } | |
419414ea | 3359 | else if (r_type == R_X86_64_GOTTPOFF) |
bffbf940 | 3360 | { |
bffbf940 | 3361 | /* IE->LE transition: |
cf61b747 | 3362 | For 64bit, originally it can be one of: |
bffbf940 JJ |
3363 | movq foo@gottpoff(%rip), %reg |
3364 | addq foo@gottpoff(%rip), %reg | |
3365 | We change it into: | |
3366 | movq $foo, %reg | |
3367 | leaq foo(%reg), %reg | |
cf61b747 L |
3368 | addq $foo, %reg. |
3369 | For 32bit, originally it can be one of: | |
3370 | movq foo@gottpoff(%rip), %reg | |
3371 | addl foo@gottpoff(%rip), %reg | |
3372 | We change it into: | |
3373 | movq $foo, %reg | |
3374 | leal foo(%reg), %reg | |
3375 | addl $foo, %reg. */ | |
142411ca L |
3376 | |
3377 | unsigned int val, type, reg; | |
3378 | ||
cf61b747 L |
3379 | if (roff >= 3) |
3380 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
3381 | else | |
3382 | val = 0; | |
142411ca L |
3383 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
3384 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 3385 | reg >>= 3; |
bffbf940 JJ |
3386 | if (type == 0x8b) |
3387 | { | |
3388 | /* movq */ | |
3389 | if (val == 0x4c) | |
3390 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3391 | contents + roff - 3); |
4a4c5f25 L |
3392 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3393 | bfd_put_8 (output_bfd, 0x41, | |
3394 | contents + roff - 3); | |
bffbf940 | 3395 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 3396 | contents + roff - 2); |
bffbf940 | 3397 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3398 | contents + roff - 1); |
bffbf940 JJ |
3399 | } |
3400 | else if (reg == 4) | |
3401 | { | |
cf61b747 L |
3402 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
3403 | is special */ | |
bffbf940 JJ |
3404 | if (val == 0x4c) |
3405 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3406 | contents + roff - 3); |
4a4c5f25 L |
3407 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3408 | bfd_put_8 (output_bfd, 0x41, | |
3409 | contents + roff - 3); | |
bffbf940 | 3410 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 3411 | contents + roff - 2); |
bffbf940 | 3412 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3413 | contents + roff - 1); |
bffbf940 JJ |
3414 | } |
3415 | else | |
3416 | { | |
cf61b747 | 3417 | /* addq/addl -> leaq/leal */ |
bffbf940 JJ |
3418 | if (val == 0x4c) |
3419 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 3420 | contents + roff - 3); |
4a4c5f25 L |
3421 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3422 | bfd_put_8 (output_bfd, 0x45, | |
3423 | contents + roff - 3); | |
bffbf940 | 3424 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 3425 | contents + roff - 2); |
bffbf940 | 3426 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 3427 | contents + roff - 1); |
bffbf940 | 3428 | } |
eb4ff4d6 | 3429 | bfd_put_32 (output_bfd, |
351f65ca | 3430 | elf_x86_64_tpoff (info, relocation), |
142411ca | 3431 | contents + roff); |
bffbf940 JJ |
3432 | continue; |
3433 | } | |
142411ca L |
3434 | else |
3435 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
3436 | } |
3437 | ||
6de2ae4a | 3438 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3439 | abort (); |
3440 | ||
3441 | if (h != NULL) | |
67a4f2b7 AO |
3442 | { |
3443 | off = h->got.offset; | |
0afcef53 | 3444 | offplt = elf_x86_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 3445 | } |
bffbf940 JJ |
3446 | else |
3447 | { | |
3448 | if (local_got_offsets == NULL) | |
3449 | abort (); | |
3450 | ||
3451 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 3452 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
3453 | } |
3454 | ||
3455 | if ((off & 1) != 0) | |
3456 | off &= ~1; | |
26e41594 | 3457 | else |
bffbf940 JJ |
3458 | { |
3459 | Elf_Internal_Rela outrel; | |
bffbf940 | 3460 | int dr_type, indx; |
67a4f2b7 | 3461 | asection *sreloc; |
bffbf940 | 3462 | |
6de2ae4a | 3463 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3464 | abort (); |
3465 | ||
67a4f2b7 AO |
3466 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3467 | ||
3468 | if (GOT_TLS_GDESC_P (tls_type)) | |
3469 | { | |
351f65ca | 3470 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 3471 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
3472 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
3473 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
3474 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3475 | + offplt |
3476 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 3477 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 3478 | if (indx == 0) |
0afcef53 | 3479 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
67a4f2b7 AO |
3480 | else |
3481 | outrel.r_addend = 0; | |
351f65ca | 3482 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
3483 | } |
3484 | ||
6de2ae4a | 3485 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 3486 | |
6de2ae4a L |
3487 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3488 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 3489 | |
67a4f2b7 | 3490 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 3491 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
3492 | else if (GOT_TLS_GDESC_P (tls_type)) |
3493 | goto dr_done; | |
bffbf940 JJ |
3494 | else |
3495 | dr_type = R_X86_64_TPOFF64; | |
3496 | ||
6de2ae4a | 3497 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 3498 | outrel.r_addend = 0; |
67a4f2b7 AO |
3499 | if ((dr_type == R_X86_64_TPOFF64 |
3500 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
0afcef53 | 3501 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
351f65ca | 3502 | outrel.r_info = htab->r_info (indx, dr_type); |
bffbf940 | 3503 | |
351f65ca | 3504 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 3505 | |
67a4f2b7 | 3506 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
3507 | { |
3508 | if (indx == 0) | |
3509 | { | |
d40d037c | 3510 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 3511 | bfd_put_64 (output_bfd, |
0afcef53 | 3512 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3513 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
3514 | } |
3515 | else | |
3516 | { | |
3517 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3518 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 3519 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
3520 | R_X86_64_DTPOFF64); |
3521 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 3522 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 3523 | &outrel); |
bffbf940 JJ |
3524 | } |
3525 | } | |
3526 | ||
67a4f2b7 | 3527 | dr_done: |
bffbf940 JJ |
3528 | if (h != NULL) |
3529 | h->got.offset |= 1; | |
3530 | else | |
3531 | local_got_offsets[r_symndx] |= 1; | |
3532 | } | |
3533 | ||
67a4f2b7 AO |
3534 | if (off >= (bfd_vma) -2 |
3535 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 3536 | abort (); |
419414ea | 3537 | if (r_type_tls == r_type) |
bffbf940 | 3538 | { |
67a4f2b7 AO |
3539 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
3540 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
3541 | relocation = htab->elf.sgotplt->output_section->vma |
3542 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3543 | + offplt + htab->sgotplt_jump_table_size; |
3544 | else | |
6de2ae4a L |
3545 | relocation = htab->elf.sgot->output_section->vma |
3546 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3547 | unresolved_reloc = FALSE; |
bffbf940 | 3548 | } |
142411ca | 3549 | else |
67a4f2b7 | 3550 | { |
142411ca | 3551 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 3552 | |
419414ea | 3553 | if (r_type == R_X86_64_TLSGD) |
142411ca | 3554 | { |
52bc799a | 3555 | /* GD->IE transition. For 64bit, change |
e2cbcd91 L |
3556 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3557 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3558 | or | |
3559 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3560 | .byte 0x66; rex64 | |
3561 | call *__tls_get_addr@GOTPCREL(%rip | |
3562 | which may be converted to | |
3563 | addr32 call __tls_get_addr | |
52bc799a | 3564 | into: |
e2cbcd91 L |
3565 | movq %fs:0, %rax |
3566 | addq foo@gottpoff(%rip), %rax | |
52bc799a | 3567 | For 32bit, change |
e2cbcd91 L |
3568 | leaq foo@tlsgd(%rip), %rdi |
3569 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3570 | or | |
3571 | leaq foo@tlsgd(%rip), %rdi | |
3572 | .byte 0x66; rex64; | |
3573 | call *__tls_get_addr@GOTPCREL(%rip) | |
3574 | which may be converted to | |
3575 | addr32 call __tls_get_addr | |
52bc799a | 3576 | into: |
e2cbcd91 L |
3577 | movl %fs:0, %eax |
3578 | addq foo@gottpoff(%rip), %rax | |
5c98a14e | 3579 | For largepic, change: |
e2cbcd91 L |
3580 | leaq foo@tlsgd(%rip), %rdi |
3581 | movabsq $__tls_get_addr@pltoff, %rax | |
3582 | addq %r15, %rax | |
3583 | call *%rax | |
5c98a14e | 3584 | into: |
e2cbcd91 L |
3585 | movq %fs:0, %rax |
3586 | addq foo@gottpoff(%rax), %rax | |
3587 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 3588 | int largepic = 0; |
e2cbcd91 | 3589 | if (ABI_64_P (output_bfd)) |
5c98a14e | 3590 | { |
e2cbcd91 L |
3591 | if (contents[roff + 5] == 0xb8) |
3592 | { | |
3593 | memcpy (contents + roff - 3, | |
3594 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
3595 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
3596 | largepic = 1; | |
3597 | } | |
3598 | else | |
3599 | memcpy (contents + roff - 4, | |
3600 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3601 | 16); | |
5c98a14e | 3602 | } |
52bc799a L |
3603 | else |
3604 | memcpy (contents + roff - 3, | |
3605 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3606 | 15); | |
142411ca | 3607 | |
6de2ae4a L |
3608 | relocation = (htab->elf.sgot->output_section->vma |
3609 | + htab->elf.sgot->output_offset + off | |
142411ca | 3610 | - roff |
5c98a14e | 3611 | - largepic |
142411ca L |
3612 | - input_section->output_section->vma |
3613 | - input_section->output_offset | |
3614 | - 12); | |
3615 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
3616 | contents + roff + 8 + largepic); |
3617 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 3618 | rel++; |
60f2e42e | 3619 | wrel++; |
142411ca L |
3620 | continue; |
3621 | } | |
419414ea | 3622 | else if (r_type == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
3623 | { |
3624 | /* GDesc -> IE transition. | |
3625 | It's originally something like: | |
3626 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 3627 | |
142411ca | 3628 | Change it to: |
c9736ba0 | 3629 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 3630 | |
142411ca L |
3631 | /* Now modify the instruction as appropriate. To |
3632 | turn a leaq into a movq in the form we use it, it | |
3633 | suffices to change the second byte from 0x8d to | |
3634 | 0x8b. */ | |
3635 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
3636 | ||
3637 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
3638 | htab->elf.sgot->output_section->vma |
3639 | + htab->elf.sgot->output_offset + off | |
142411ca L |
3640 | - rel->r_offset |
3641 | - input_section->output_section->vma | |
3642 | - input_section->output_offset | |
3643 | - 4, | |
3644 | contents + roff); | |
3645 | continue; | |
3646 | } | |
419414ea | 3647 | else if (r_type == R_X86_64_TLSDESC_CALL) |
142411ca L |
3648 | { |
3649 | /* GDesc -> IE transition. | |
3650 | It's originally: | |
3651 | call *(%rax) | |
3652 | ||
3653 | Change it to: | |
c9736ba0 | 3654 | xchg %ax, %ax. */ |
142411ca | 3655 | |
142411ca L |
3656 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
3657 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
3658 | continue; | |
3659 | } | |
3660 | else | |
3661 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 3662 | } |
bffbf940 JJ |
3663 | break; |
3664 | ||
3665 | case R_X86_64_TLSLD: | |
351f65ca L |
3666 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3667 | input_section, contents, | |
3668 | symtab_hdr, sym_hashes, | |
bedfd056 L |
3669 | &r_type, GOT_UNKNOWN, rel, |
3670 | relend, h, r_symndx, TRUE)) | |
142411ca | 3671 | return FALSE; |
a3fadc9a | 3672 | |
142411ca L |
3673 | if (r_type != R_X86_64_TLSLD) |
3674 | { | |
bffbf940 | 3675 | /* LD->LE transition: |
e2cbcd91 L |
3676 | leaq foo@tlsld(%rip), %rdi |
3677 | call __tls_get_addr@PLT | |
3678 | For 64bit, we change it into: | |
3679 | .word 0x6666; .byte 0x66; movq %fs:0, %rax | |
3680 | For 32bit, we change it into: | |
3681 | nopl 0x0(%rax); movl %fs:0, %eax | |
3682 | Or | |
3683 | leaq foo@tlsld(%rip), %rdi; | |
3684 | call *__tls_get_addr@GOTPCREL(%rip) | |
3685 | which may be converted to | |
3686 | addr32 call __tls_get_addr | |
52bc799a | 3687 | For 64bit, we change it into: |
e2cbcd91 | 3688 | .word 0x6666; .word 0x6666; movq %fs:0, %rax |
52bc799a | 3689 | For 32bit, we change it into: |
e2cbcd91 | 3690 | nopw 0x0(%rax); movl %fs:0, %eax |
5c98a14e | 3691 | For largepic, change: |
e2cbcd91 L |
3692 | leaq foo@tlsgd(%rip), %rdi |
3693 | movabsq $__tls_get_addr@pltoff, %rax | |
3694 | addq %rbx, %rax | |
3695 | call *%rax | |
3696 | into | |
3697 | data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
3698 | movq %fs:0, %eax */ | |
142411ca L |
3699 | |
3700 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
e2cbcd91 L |
3701 | if (ABI_64_P (output_bfd)) |
3702 | { | |
3703 | if (contents[rel->r_offset + 5] == 0xb8) | |
3704 | memcpy (contents + rel->r_offset - 3, | |
3705 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
3706 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
3707 | else if (contents[rel->r_offset + 4] == 0xff | |
3708 | || contents[rel->r_offset + 4] == 0x67) | |
3709 | memcpy (contents + rel->r_offset - 3, | |
3710 | "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", | |
3711 | 13); | |
3712 | else | |
3713 | memcpy (contents + rel->r_offset - 3, | |
3714 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
3715 | } | |
52bc799a | 3716 | else |
e2cbcd91 L |
3717 | { |
3718 | if (contents[rel->r_offset + 4] == 0xff) | |
3719 | memcpy (contents + rel->r_offset - 3, | |
3720 | "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", | |
3721 | 13); | |
3722 | else | |
3723 | memcpy (contents + rel->r_offset - 3, | |
3724 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
3725 | } | |
3726 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX | |
3727 | and R_X86_64_PLTOFF64. */ | |
bffbf940 | 3728 | rel++; |
60f2e42e | 3729 | wrel++; |
bffbf940 JJ |
3730 | continue; |
3731 | } | |
3732 | ||
6de2ae4a | 3733 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3734 | abort (); |
3735 | ||
0afcef53 | 3736 | off = htab->tls_ld_or_ldm_got.offset; |
bffbf940 JJ |
3737 | if (off & 1) |
3738 | off &= ~1; | |
3739 | else | |
3740 | { | |
3741 | Elf_Internal_Rela outrel; | |
bffbf940 | 3742 | |
6de2ae4a | 3743 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3744 | abort (); |
3745 | ||
6de2ae4a L |
3746 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3747 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
3748 | |
3749 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3750 | htab->elf.sgot->contents + off); |
bffbf940 | 3751 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 3752 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 3753 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 3754 | outrel.r_addend = 0; |
351f65ca | 3755 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 3756 | &outrel); |
0afcef53 | 3757 | htab->tls_ld_or_ldm_got.offset |= 1; |
bffbf940 | 3758 | } |
6de2ae4a L |
3759 | relocation = htab->elf.sgot->output_section->vma |
3760 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3761 | unresolved_reloc = FALSE; |
bffbf940 JJ |
3762 | break; |
3763 | ||
3764 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
3765 | if (!bfd_link_executable (info) |
3766 | || (input_section->flags & SEC_CODE) == 0) | |
0afcef53 | 3767 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
bffbf940 | 3768 | else |
351f65ca | 3769 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
3770 | break; |
3771 | ||
3772 | case R_X86_64_TPOFF32: | |
6769d501 | 3773 | case R_X86_64_TPOFF64: |
0e1862bb | 3774 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 3775 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
3776 | break; |
3777 | ||
a69ed7f7 L |
3778 | case R_X86_64_DTPOFF64: |
3779 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
0afcef53 | 3780 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
a69ed7f7 L |
3781 | break; |
3782 | ||
70256ad8 AJ |
3783 | default: |
3784 | break; | |
3785 | } | |
8d88c4ca | 3786 | |
239e1f3a AM |
3787 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3788 | because such sections are not SEC_ALLOC and thus ld.so will | |
3789 | not process them. */ | |
c434dee6 | 3790 | if (unresolved_reloc |
239e1f3a | 3791 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
3792 | && h->def_dynamic) |
3793 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
3794 | rel->r_offset) != (bfd_vma) -1) | |
a040981f | 3795 | { |
7073b5b9 L |
3796 | switch (r_type) |
3797 | { | |
3798 | case R_X86_64_32S: | |
a5b4ee94 L |
3799 | sec = h->root.u.def.section; |
3800 | if ((info->nocopyreloc | |
3801 | || (eh->def_protected | |
3802 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
3803 | && !(h->root.u.def.section->flags & SEC_CODE)) |
3804 | return elf_x86_64_need_pic (info, input_bfd, input_section, | |
3805 | h, NULL, NULL, howto); | |
3806 | /* Fall through. */ | |
3807 | ||
3808 | default: | |
3809 | _bfd_error_handler | |
3810 | /* xgettext:c-format */ | |
2dcf00ce AM |
3811 | (_("%pB(%pA+%#" PRIx64 "): " |
3812 | "unresolvable %s relocation against symbol `%s'"), | |
7073b5b9 L |
3813 | input_bfd, |
3814 | input_section, | |
2dcf00ce | 3815 | (uint64_t) rel->r_offset, |
7073b5b9 L |
3816 | howto->name, |
3817 | h->root.root.string); | |
3818 | return FALSE; | |
3819 | } | |
a040981f | 3820 | } |
c434dee6 | 3821 | |
cbe950e9 | 3822 | do_relocation: |
8d88c4ca | 3823 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
3824 | contents, rel->r_offset, |
3825 | relocation, rel->r_addend); | |
8d88c4ca | 3826 | |
62d78908 | 3827 | check_relocation_error: |
8d88c4ca | 3828 | if (r != bfd_reloc_ok) |
8da6118f | 3829 | { |
c434dee6 AJ |
3830 | const char *name; |
3831 | ||
3832 | if (h != NULL) | |
3833 | name = h->root.root.string; | |
3834 | else | |
8da6118f | 3835 | { |
c434dee6 AJ |
3836 | name = bfd_elf_string_from_elf_section (input_bfd, |
3837 | symtab_hdr->sh_link, | |
3838 | sym->st_name); | |
3839 | if (name == NULL) | |
b34976b6 | 3840 | return FALSE; |
c434dee6 AJ |
3841 | if (*name == '\0') |
3842 | name = bfd_section_name (input_bfd, sec); | |
3843 | } | |
3844 | ||
3845 | if (r == bfd_reloc_overflow) | |
8b43e456 | 3846 | { |
78984959 | 3847 | if (converted_reloc) |
8b43e456 L |
3848 | { |
3849 | info->callbacks->einfo | |
3850 | (_("%F%P: failed to convert GOTPCREL relocation; relink with --no-relax\n")); | |
3851 | return FALSE; | |
3852 | } | |
3853 | (*info->callbacks->reloc_overflow) | |
3854 | (info, (h ? &h->root : NULL), name, howto->name, | |
3855 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
3856 | } | |
c434dee6 AJ |
3857 | else |
3858 | { | |
4eca0228 | 3859 | _bfd_error_handler |
695344c0 | 3860 | /* xgettext:c-format */ |
2dcf00ce | 3861 | (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"), |
d003868e | 3862 | input_bfd, input_section, |
2dcf00ce | 3863 | (uint64_t) rel->r_offset, name, (int) r); |
b34976b6 | 3864 | return FALSE; |
8da6118f KH |
3865 | } |
3866 | } | |
60f2e42e L |
3867 | |
3868 | if (wrel != rel) | |
3869 | *wrel = *rel; | |
3870 | } | |
3871 | ||
3872 | if (wrel != rel) | |
3873 | { | |
3874 | Elf_Internal_Shdr *rel_hdr; | |
3875 | size_t deleted = rel - wrel; | |
3876 | ||
3877 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
3878 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
3879 | if (rel_hdr->sh_size == 0) | |
3880 | { | |
3881 | /* It is too late to remove an empty reloc section. Leave | |
3882 | one NONE reloc. | |
3883 | ??? What is wrong with an empty section??? */ | |
3884 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
3885 | deleted -= 1; | |
3886 | } | |
3887 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
3888 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
3889 | input_section->reloc_count -= deleted; | |
8d88c4ca | 3890 | } |
70256ad8 | 3891 | |
b34976b6 | 3892 | return TRUE; |
70256ad8 AJ |
3893 | } |
3894 | ||
3895 | /* Finish up dynamic symbol handling. We set the contents of various | |
3896 | dynamic sections here. */ | |
3897 | ||
b34976b6 | 3898 | static bfd_boolean |
351f65ca L |
3899 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
3900 | struct bfd_link_info *info, | |
3901 | struct elf_link_hash_entry *h, | |
aec6b87e | 3902 | Elf_Internal_Sym *sym) |
70256ad8 | 3903 | { |
0afcef53 | 3904 | struct elf_x86_link_hash_table *htab; |
f2c29a16 | 3905 | bfd_boolean use_plt_second; |
0afcef53 | 3906 | struct elf_x86_link_hash_entry *eh; |
aec6b87e | 3907 | bfd_boolean local_undefweak; |
70256ad8 | 3908 | |
0afcef53 | 3909 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
3910 | if (htab == NULL) |
3911 | return FALSE; | |
70256ad8 | 3912 | |
f2c29a16 L |
3913 | /* Use the second PLT section only if there is .plt section. */ |
3914 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
0ff2b86e | 3915 | |
0afcef53 | 3916 | eh = (struct elf_x86_link_hash_entry *) h; |
9e9821dd L |
3917 | if (eh->no_finish_dynamic_symbol) |
3918 | abort (); | |
dd7e64d4 | 3919 | |
aec6b87e L |
3920 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
3921 | resolved undefined weak symbols in executable so that their | |
3922 | references have value 0 at run-time. */ | |
c5bce5c6 | 3923 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); |
aec6b87e | 3924 | |
70256ad8 AJ |
3925 | if (h->plt.offset != (bfd_vma) -1) |
3926 | { | |
70256ad8 | 3927 | bfd_vma plt_index; |
38b12349 | 3928 | bfd_vma got_offset, plt_offset; |
70256ad8 | 3929 | Elf_Internal_Rela rela; |
947216bf | 3930 | bfd_byte *loc; |
0ff2b86e | 3931 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 3932 | const struct elf_backend_data *bed; |
5974eba6 | 3933 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
3934 | |
3935 | /* When building a static executable, use .iplt, .igot.plt and | |
3936 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 3937 | if (htab->elf.splt != NULL) |
cbe950e9 | 3938 | { |
6de2ae4a L |
3939 | plt = htab->elf.splt; |
3940 | gotplt = htab->elf.sgotplt; | |
3941 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
3942 | } |
3943 | else | |
3944 | { | |
6de2ae4a L |
3945 | plt = htab->elf.iplt; |
3946 | gotplt = htab->elf.igotplt; | |
3947 | relplt = htab->elf.irelplt; | |
cbe950e9 | 3948 | } |
70256ad8 | 3949 | |
f3180fa9 | 3950 | VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak) |
70256ad8 AJ |
3951 | |
3952 | /* Get the index in the procedure linkage table which | |
3953 | corresponds to this symbol. This is the index of this symbol | |
3954 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 3955 | first entry in the procedure linkage table is reserved. |
6bbec505 | 3956 | |
cbe950e9 | 3957 | Get the offset into the .got table of the entry that |
407443a3 | 3958 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
3959 | bytes. The first three are reserved for the dynamic linker. |
3960 | ||
3961 | For static executables, we don't reserve anything. */ | |
3962 | ||
6de2ae4a | 3963 | if (plt == htab->elf.splt) |
cbe950e9 | 3964 | { |
765e526c L |
3965 | got_offset = (h->plt.offset / htab->plt.plt_entry_size |
3966 | - htab->plt.has_plt0); | |
e1f98742 | 3967 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
3968 | } |
3969 | else | |
3970 | { | |
765e526c | 3971 | got_offset = h->plt.offset / htab->plt.plt_entry_size; |
e1f98742 | 3972 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 3973 | } |
70256ad8 | 3974 | |
38b12349 | 3975 | /* Fill in the entry in the procedure linkage table. */ |
765e526c L |
3976 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, |
3977 | htab->plt.plt_entry_size); | |
f2c29a16 | 3978 | if (use_plt_second) |
0ff2b86e | 3979 | { |
f2c29a16 | 3980 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
765e526c L |
3981 | htab->non_lazy_plt->plt_entry, |
3982 | htab->non_lazy_plt->plt_entry_size); | |
0ff2b86e | 3983 | |
f2c29a16 L |
3984 | resolved_plt = htab->plt_second; |
3985 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
3986 | } |
3987 | else | |
3988 | { | |
0ff2b86e L |
3989 | resolved_plt = plt; |
3990 | plt_offset = h->plt.offset; | |
3991 | } | |
eed180f8 RM |
3992 | |
3993 | /* Insert the relocation positions of the plt section. */ | |
3994 | ||
3995 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
3996 | subtracting the size of that instruction. */ | |
ab7fede8 L |
3997 | plt_got_pcrel_offset = (gotplt->output_section->vma |
3998 | + gotplt->output_offset | |
3999 | + got_offset | |
4000 | - resolved_plt->output_section->vma | |
4001 | - resolved_plt->output_offset | |
4002 | - plt_offset | |
765e526c | 4003 | - htab->plt.plt_got_insn_size); |
ab7fede8 L |
4004 | |
4005 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 4006 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
695344c0 | 4007 | /* xgettext:c-format */ |
871b3ab2 | 4008 | info->callbacks->einfo (_("%F%pB: PC-relative offset overflow in PLT entry for `%s'\n"), |
ab7fede8 L |
4009 | output_bfd, h->root.root.string); |
4010 | ||
4011 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
38b12349 | 4012 | (resolved_plt->contents + plt_offset |
765e526c | 4013 | + htab->plt.plt_got_offset)); |
cbe950e9 | 4014 | |
653165cc | 4015 | /* Fill in the entry in the global offset table, initially this |
aec6b87e L |
4016 | points to the second part of the PLT entry. Leave the entry |
4017 | as zero for undefined weak symbol in PIE. No PLT relocation | |
4018 | against undefined weak symbol in PIE. */ | |
4019 | if (!local_undefweak) | |
cbe950e9 | 4020 | { |
765e526c | 4021 | if (htab->plt.has_plt0) |
38b12349 L |
4022 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4023 | + plt->output_offset | |
4024 | + h->plt.offset | |
765e526c | 4025 | + htab->lazy_plt->plt_lazy_offset), |
38b12349 | 4026 | gotplt->contents + got_offset); |
aec6b87e L |
4027 | |
4028 | /* Fill in the entry in the .rela.plt section. */ | |
4029 | rela.r_offset = (gotplt->output_section->vma | |
4030 | + gotplt->output_offset | |
4031 | + got_offset); | |
cf1070f1 | 4032 | if (PLT_LOCAL_IFUNC_P (info, h)) |
aec6b87e | 4033 | { |
871b3ab2 | 4034 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
4035 | h->root.root.string, |
4036 | h->root.u.def.section->owner); | |
4037 | ||
aec6b87e L |
4038 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
4039 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
4040 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); | |
4041 | rela.r_addend = (h->root.u.def.value | |
4042 | + h->root.u.def.section->output_section->vma | |
4043 | + h->root.u.def.section->output_offset); | |
4044 | /* R_X86_64_IRELATIVE comes last. */ | |
4045 | plt_index = htab->next_irelative_index--; | |
4046 | } | |
4047 | else | |
4048 | { | |
4049 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); | |
4050 | rela.r_addend = 0; | |
4051 | plt_index = htab->next_jump_slot_index++; | |
4052 | } | |
e1f98742 | 4053 | |
38b12349 L |
4054 | /* Don't fill the second and third slots in PLT entry for |
4055 | static executables nor without PLT0. */ | |
765e526c | 4056 | if (plt == htab->elf.splt && htab->plt.has_plt0) |
aec6b87e | 4057 | { |
38b12349 | 4058 | bfd_vma plt0_offset |
765e526c | 4059 | = h->plt.offset + htab->lazy_plt->plt_plt_insn_end; |
aec6b87e L |
4060 | |
4061 | /* Put relocation index. */ | |
4062 | bfd_put_32 (output_bfd, plt_index, | |
4063 | (plt->contents + h->plt.offset | |
765e526c | 4064 | + htab->lazy_plt->plt_reloc_offset)); |
aec6b87e L |
4065 | |
4066 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
4067 | check relocation index for overflow since branch displacement | |
4068 | will overflow first. */ | |
4069 | if (plt0_offset > 0x80000000) | |
695344c0 | 4070 | /* xgettext:c-format */ |
871b3ab2 | 4071 | info->callbacks->einfo (_("%F%pB: branch displacement overflow in PLT entry for `%s'\n"), |
aec6b87e L |
4072 | output_bfd, h->root.root.string); |
4073 | bfd_put_32 (output_bfd, - plt0_offset, | |
38b12349 | 4074 | (plt->contents + h->plt.offset |
765e526c | 4075 | + htab->lazy_plt->plt_plt_offset)); |
aec6b87e | 4076 | } |
351f65ca | 4077 | |
aec6b87e L |
4078 | bed = get_elf_backend_data (output_bfd); |
4079 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
4080 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
4081 | } | |
dd7e64d4 L |
4082 | } |
4083 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
4084 | { | |
38b12349 | 4085 | bfd_vma got_offset, plt_offset; |
dd7e64d4 L |
4086 | asection *plt, *got; |
4087 | bfd_boolean got_after_plt; | |
4088 | int32_t got_pcrel_offset; | |
dd7e64d4 L |
4089 | |
4090 | /* Set the entry in the GOT procedure linkage table. */ | |
4091 | plt = htab->plt_got; | |
4092 | got = htab->elf.sgot; | |
4093 | got_offset = h->got.offset; | |
4094 | ||
4095 | if (got_offset == (bfd_vma) -1 | |
e492d2f8 | 4096 | || (h->type == STT_GNU_IFUNC && h->def_regular) |
dd7e64d4 L |
4097 | || plt == NULL |
4098 | || got == NULL) | |
4099 | abort (); | |
70256ad8 | 4100 | |
38b12349 | 4101 | /* Use the non-lazy PLT entry template for the GOT PLT since they |
dd7e64d4 | 4102 | are the identical. */ |
dd7e64d4 L |
4103 | /* Fill in the entry in the GOT procedure linkage table. */ |
4104 | plt_offset = eh->plt_got.offset; | |
4105 | memcpy (plt->contents + plt_offset, | |
765e526c L |
4106 | htab->non_lazy_plt->plt_entry, |
4107 | htab->non_lazy_plt->plt_entry_size); | |
dd7e64d4 L |
4108 | |
4109 | /* Put offset the PC-relative instruction referring to the GOT | |
4110 | entry, subtracting the size of that instruction. */ | |
4111 | got_pcrel_offset = (got->output_section->vma | |
4112 | + got->output_offset | |
4113 | + got_offset | |
4114 | - plt->output_section->vma | |
4115 | - plt->output_offset | |
4116 | - plt_offset | |
765e526c | 4117 | - htab->non_lazy_plt->plt_got_insn_size); |
dd7e64d4 L |
4118 | |
4119 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
4120 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
4121 | if ((got_after_plt && got_pcrel_offset < 0) | |
4122 | || (!got_after_plt && got_pcrel_offset > 0)) | |
695344c0 | 4123 | /* xgettext:c-format */ |
871b3ab2 | 4124 | info->callbacks->einfo (_("%F%pB: PC-relative offset overflow in GOT PLT entry for `%s'\n"), |
dd7e64d4 L |
4125 | output_bfd, h->root.root.string); |
4126 | ||
4127 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
38b12349 | 4128 | (plt->contents + plt_offset |
765e526c | 4129 | + htab->non_lazy_plt->plt_got_offset)); |
dd7e64d4 L |
4130 | } |
4131 | ||
aec6b87e L |
4132 | if (!local_undefweak |
4133 | && !h->def_regular | |
dd7e64d4 L |
4134 | && (h->plt.offset != (bfd_vma) -1 |
4135 | || eh->plt_got.offset != (bfd_vma) -1)) | |
4136 | { | |
4137 | /* Mark the symbol as undefined, rather than as defined in | |
4138 | the .plt section. Leave the value if there were any | |
4139 | relocations where pointer equality matters (this is a clue | |
4140 | for the dynamic linker, to make function pointer | |
4141 | comparisons work between an application and shared | |
4142 | library), otherwise set it to zero. If a function is only | |
4143 | called from a binary, there is no need to slow down | |
4144 | shared libraries because of that. */ | |
4145 | sym->st_shndx = SHN_UNDEF; | |
4146 | if (!h->pointer_equality_needed) | |
4147 | sym->st_value = 0; | |
70256ad8 AJ |
4148 | } |
4149 | ||
aec6b87e L |
4150 | /* Don't generate dynamic GOT relocation against undefined weak |
4151 | symbol in executable. */ | |
bffbf940 | 4152 | if (h->got.offset != (bfd_vma) -1 |
0afcef53 L |
4153 | && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h)->tls_type) |
4154 | && elf_x86_hash_entry (h)->tls_type != GOT_TLS_IE | |
aec6b87e | 4155 | && !local_undefweak) |
053579d7 | 4156 | { |
053579d7 | 4157 | Elf_Internal_Rela rela; |
233cc9c1 | 4158 | asection *relgot = htab->elf.srelgot; |
053579d7 AJ |
4159 | |
4160 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 4161 | up. */ |
6de2ae4a | 4162 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 4163 | abort (); |
053579d7 | 4164 | |
6de2ae4a L |
4165 | rela.r_offset = (htab->elf.sgot->output_section->vma |
4166 | + htab->elf.sgot->output_offset | |
dc810e39 | 4167 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
4168 | |
4169 | /* If this is a static link, or it is a -Bsymbolic link and the | |
4170 | symbol is defined locally or was forced to be local because | |
4171 | of a version file, we just want to emit a RELATIVE reloc. | |
4172 | The entry in the global offset table will already have been | |
4173 | initialized in the relocate_section function. */ | |
710ab287 | 4174 | if (h->def_regular |
0018b0a3 L |
4175 | && h->type == STT_GNU_IFUNC) |
4176 | { | |
233cc9c1 L |
4177 | if (h->plt.offset == (bfd_vma) -1) |
4178 | { | |
4179 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
4180 | if (htab->elf.splt == NULL) | |
4181 | { | |
4182 | /* use .rel[a].iplt section to store .got relocations | |
4183 | in static executable. */ | |
4184 | relgot = htab->elf.irelplt; | |
4185 | } | |
6999821f | 4186 | if (SYMBOL_REFERENCES_LOCAL_P (info, h)) |
233cc9c1 | 4187 | { |
871b3ab2 | 4188 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
4189 | h->root.root.string, |
4190 | h->root.u.def.section->owner); | |
4191 | ||
233cc9c1 L |
4192 | rela.r_info = htab->r_info (0, |
4193 | R_X86_64_IRELATIVE); | |
4194 | rela.r_addend = (h->root.u.def.value | |
4195 | + h->root.u.def.section->output_section->vma | |
4196 | + h->root.u.def.section->output_offset); | |
4197 | } | |
4198 | else | |
4199 | goto do_glob_dat; | |
4200 | } | |
4201 | else if (bfd_link_pic (info)) | |
710ab287 L |
4202 | { |
4203 | /* Generate R_X86_64_GLOB_DAT. */ | |
4204 | goto do_glob_dat; | |
4205 | } | |
4206 | else | |
4207 | { | |
90d60710 | 4208 | asection *plt; |
aab82f4c | 4209 | bfd_vma plt_offset; |
90d60710 | 4210 | |
710ab287 L |
4211 | if (!h->pointer_equality_needed) |
4212 | abort (); | |
4213 | ||
4214 | /* For non-shared object, we can't use .got.plt, which | |
4215 | contains the real function addres if we need pointer | |
4216 | equality. We load the GOT entry with the PLT entry. */ | |
f2c29a16 | 4217 | if (htab->plt_second != NULL) |
aab82f4c | 4218 | { |
f2c29a16 L |
4219 | plt = htab->plt_second; |
4220 | plt_offset = eh->plt_second.offset; | |
aab82f4c L |
4221 | } |
4222 | else | |
4223 | { | |
4224 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
4225 | plt_offset = h->plt.offset; | |
4226 | } | |
710ab287 L |
4227 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4228 | + plt->output_offset | |
aab82f4c | 4229 | + plt_offset), |
6de2ae4a | 4230 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
4231 | return TRUE; |
4232 | } | |
0018b0a3 | 4233 | } |
0e1862bb | 4234 | else if (bfd_link_pic (info) |
6999821f | 4235 | && SYMBOL_REFERENCES_LOCAL_P (info, h)) |
053579d7 | 4236 | { |
ad71ce8d | 4237 | if (!(h->def_regular || ELF_COMMON_DEF_P (h))) |
41bed6dd | 4238 | return FALSE; |
cc78d0af | 4239 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 4240 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
4241 | rela.r_addend = (h->root.u.def.value |
4242 | + h->root.u.def.section->output_section->vma | |
4243 | + h->root.u.def.section->output_offset); | |
4244 | } | |
4245 | else | |
4246 | { | |
4247 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 4248 | do_glob_dat: |
c434dee6 | 4249 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4250 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 4251 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
4252 | rela.r_addend = 0; |
4253 | } | |
4254 | ||
233cc9c1 | 4255 | elf_append_rela (output_bfd, relgot, &rela); |
053579d7 AJ |
4256 | } |
4257 | ||
f5385ebf | 4258 | if (h->needs_copy) |
70256ad8 | 4259 | { |
70256ad8 | 4260 | Elf_Internal_Rela rela; |
5474d94f | 4261 | asection *s; |
70256ad8 AJ |
4262 | |
4263 | /* This symbol needs a copy reloc. Set it up. */ | |
ff38b4cc | 4264 | VERIFY_COPY_RELOC (h, htab) |
70256ad8 AJ |
4265 | |
4266 | rela.r_offset = (h->root.u.def.value | |
4267 | + h->root.u.def.section->output_section->vma | |
4268 | + h->root.u.def.section->output_offset); | |
351f65ca | 4269 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 4270 | rela.r_addend = 0; |
afbf7e8e | 4271 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
4272 | s = htab->elf.sreldynrelro; |
4273 | else | |
4274 | s = htab->elf.srelbss; | |
4275 | elf_append_rela (output_bfd, s, &rela); | |
70256ad8 AJ |
4276 | } |
4277 | ||
b34976b6 | 4278 | return TRUE; |
70256ad8 AJ |
4279 | } |
4280 | ||
c25bc9fc L |
4281 | /* Finish up local dynamic symbol handling. We set the contents of |
4282 | various dynamic sections here. */ | |
4283 | ||
4284 | static bfd_boolean | |
351f65ca | 4285 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
4286 | { |
4287 | struct elf_link_hash_entry *h | |
4288 | = (struct elf_link_hash_entry *) *slot; | |
4289 | struct bfd_link_info *info | |
eed180f8 | 4290 | = (struct bfd_link_info *) inf; |
c25bc9fc | 4291 | |
351f65ca | 4292 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
5f0f0847 | 4293 | info, h, NULL); |
c25bc9fc L |
4294 | } |
4295 | ||
aec6b87e L |
4296 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
4297 | here since undefined weak symbol may not be dynamic and may not be | |
4298 | called for elf_x86_64_finish_dynamic_symbol. */ | |
4299 | ||
4300 | static bfd_boolean | |
4301 | elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
4302 | void *inf) | |
4303 | { | |
4304 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
4305 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
4306 | ||
4307 | if (h->root.type != bfd_link_hash_undefweak | |
4308 | || h->dynindx != -1) | |
4309 | return TRUE; | |
4310 | ||
4311 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, | |
5f0f0847 | 4312 | info, h, NULL); |
aec6b87e L |
4313 | } |
4314 | ||
c434dee6 AJ |
4315 | /* Used to decide how to sort relocs in an optimal manner for the |
4316 | dynamic linker, before writing them out. */ | |
4317 | ||
4318 | static enum elf_reloc_type_class | |
cae1fbbb | 4319 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
4320 | const asection *rel_sec ATTRIBUTE_UNUSED, |
4321 | const Elf_Internal_Rela *rela) | |
c434dee6 | 4322 | { |
cae1fbbb L |
4323 | bfd *abfd = info->output_bfd; |
4324 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
0afcef53 L |
4325 | struct elf_x86_link_hash_table *htab |
4326 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
cae1fbbb | 4327 | |
d9e3b590 L |
4328 | if (htab->elf.dynsym != NULL |
4329 | && htab->elf.dynsym->contents != NULL) | |
4330 | { | |
4331 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
07d6d2b8 | 4332 | dynamic symbols. */ |
d9e3b590 | 4333 | unsigned long r_symndx = htab->r_sym (rela->r_info); |
897463b1 L |
4334 | if (r_symndx != STN_UNDEF) |
4335 | { | |
4336 | Elf_Internal_Sym sym; | |
4337 | if (!bed->s->swap_symbol_in (abfd, | |
4338 | (htab->elf.dynsym->contents | |
4339 | + r_symndx * bed->s->sizeof_sym), | |
4340 | 0, &sym)) | |
4341 | abort (); | |
d9e3b590 | 4342 | |
897463b1 L |
4343 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
4344 | return reloc_class_ifunc; | |
4345 | } | |
d9e3b590 | 4346 | } |
cae1fbbb | 4347 | |
351f65ca | 4348 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 | 4349 | { |
c428ce9d L |
4350 | case R_X86_64_IRELATIVE: |
4351 | return reloc_class_ifunc; | |
c434dee6 | 4352 | case R_X86_64_RELATIVE: |
1da80baa | 4353 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
4354 | return reloc_class_relative; |
4355 | case R_X86_64_JUMP_SLOT: | |
4356 | return reloc_class_plt; | |
4357 | case R_X86_64_COPY: | |
4358 | return reloc_class_copy; | |
4359 | default: | |
4360 | return reloc_class_normal; | |
4361 | } | |
4362 | } | |
4363 | ||
70256ad8 AJ |
4364 | /* Finish up the dynamic sections. */ |
4365 | ||
b34976b6 | 4366 | static bfd_boolean |
351f65ca L |
4367 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
4368 | struct bfd_link_info *info) | |
70256ad8 | 4369 | { |
0afcef53 | 4370 | struct elf_x86_link_hash_table *htab; |
70256ad8 | 4371 | |
9577f60b | 4372 | htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info); |
4dfe6ac6 NC |
4373 | if (htab == NULL) |
4374 | return FALSE; | |
4375 | ||
9577f60b L |
4376 | if (! htab->elf.dynamic_sections_created) |
4377 | return TRUE; | |
70256ad8 | 4378 | |
9577f60b | 4379 | if (htab->elf.splt && htab->elf.splt->size > 0) |
e41b3a13 | 4380 | { |
9577f60b L |
4381 | elf_section_data (htab->elf.splt->output_section) |
4382 | ->this_hdr.sh_entsize = htab->plt.plt_entry_size; | |
e41b3a13 | 4383 | |
9577f60b | 4384 | if (htab->plt.has_plt0) |
fff53dae | 4385 | { |
9577f60b L |
4386 | /* Fill in the special first entry in the procedure linkage |
4387 | table. */ | |
4388 | memcpy (htab->elf.splt->contents, | |
4389 | htab->lazy_plt->plt0_entry, | |
4390 | htab->lazy_plt->plt0_entry_size); | |
4391 | /* Add offset for pushq GOT+8(%rip), since the instruction | |
4392 | uses 6 bytes subtract this value. */ | |
4393 | bfd_put_32 (output_bfd, | |
4394 | (htab->elf.sgotplt->output_section->vma | |
4395 | + htab->elf.sgotplt->output_offset | |
4396 | + 8 | |
4397 | - htab->elf.splt->output_section->vma | |
4398 | - htab->elf.splt->output_offset | |
4399 | - 6), | |
4400 | (htab->elf.splt->contents | |
4401 | + htab->lazy_plt->plt0_got1_offset)); | |
4402 | /* Add offset for the PC-relative instruction accessing | |
4403 | GOT+16, subtracting the offset to the end of that | |
4404 | instruction. */ | |
4405 | bfd_put_32 (output_bfd, | |
4406 | (htab->elf.sgotplt->output_section->vma | |
4407 | + htab->elf.sgotplt->output_offset | |
4408 | + 16 | |
4409 | - htab->elf.splt->output_section->vma | |
4410 | - htab->elf.splt->output_offset | |
4411 | - htab->lazy_plt->plt0_got2_insn_end), | |
4412 | (htab->elf.splt->contents | |
4413 | + htab->lazy_plt->plt0_got2_offset)); | |
fff53dae | 4414 | } |
fff53dae | 4415 | |
9577f60b | 4416 | if (htab->tlsdesc_plt) |
8361ed4d | 4417 | { |
bf54968b L |
4418 | /* The TLSDESC entry in a lazy procedure linkage table. */ |
4419 | static const bfd_byte tlsdesc_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
4420 | { | |
4421 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
4422 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
4423 | 0xff, 0x25, 16, 0, 0, 0 /* jmpq *GOT+TDG(%rip) */ | |
4424 | }; | |
4425 | ||
9577f60b L |
4426 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
4427 | htab->elf.sgot->contents + htab->tlsdesc_got); | |
4428 | ||
4429 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, | |
bf54968b | 4430 | tlsdesc_plt_entry, LAZY_PLT_ENTRY_SIZE); |
9577f60b | 4431 | |
bf54968b L |
4432 | /* Add offset for pushq GOT+8(%rip), since ENDBR64 uses 4 |
4433 | bytes and the instruction uses 6 bytes, subtract these | |
4434 | values. */ | |
9577f60b L |
4435 | bfd_put_32 (output_bfd, |
4436 | (htab->elf.sgotplt->output_section->vma | |
4437 | + htab->elf.sgotplt->output_offset | |
4438 | + 8 | |
4439 | - htab->elf.splt->output_section->vma | |
4440 | - htab->elf.splt->output_offset | |
4441 | - htab->tlsdesc_plt | |
bf54968b | 4442 | - 4 - 6), |
9577f60b L |
4443 | (htab->elf.splt->contents |
4444 | + htab->tlsdesc_plt | |
bf54968b L |
4445 | + 4 + 2)); |
4446 | /* Add offset for indirect branch via GOT+TDG, where TDG | |
4447 | stands for htab->tlsdesc_got, subtracting the offset | |
4448 | to the end of that instruction. */ | |
9577f60b L |
4449 | bfd_put_32 (output_bfd, |
4450 | (htab->elf.sgot->output_section->vma | |
4451 | + htab->elf.sgot->output_offset | |
4452 | + htab->tlsdesc_got | |
4453 | - htab->elf.splt->output_section->vma | |
4454 | - htab->elf.splt->output_offset | |
4455 | - htab->tlsdesc_plt | |
bf54968b | 4456 | - 4 - 6 - 6), |
9577f60b | 4457 | (htab->elf.splt->contents |
bf54968b | 4458 | + htab->tlsdesc_plt + 4 + 6 + 2)); |
8361ed4d L |
4459 | } |
4460 | } | |
4461 | ||
aec6b87e L |
4462 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
4463 | if (bfd_link_pie (info)) | |
4464 | bfd_hash_traverse (&info->hash->table, | |
4465 | elf_x86_64_pie_finish_undefweak_symbol, | |
4466 | info); | |
4467 | ||
b34976b6 | 4468 | return TRUE; |
8d88c4ca NC |
4469 | } |
4470 | ||
233cc9c1 L |
4471 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
4472 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
4473 | It has to be done before elf_link_sort_relocs is called so that | |
4474 | dynamic relocations are properly sorted. */ | |
4475 | ||
4476 | static bfd_boolean | |
4477 | elf_x86_64_output_arch_local_syms | |
4478 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
4479 | struct bfd_link_info *info, | |
4480 | void *flaginfo ATTRIBUTE_UNUSED, | |
4481 | int (*func) (void *, const char *, | |
4482 | Elf_Internal_Sym *, | |
4483 | asection *, | |
4484 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
4485 | { | |
0afcef53 L |
4486 | struct elf_x86_link_hash_table *htab |
4487 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
233cc9c1 L |
4488 | if (htab == NULL) |
4489 | return FALSE; | |
4490 | ||
4491 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
4492 | htab_traverse (htab->loc_hash_table, | |
4493 | elf_x86_64_finish_local_dynamic_symbol, | |
4494 | info); | |
4495 | ||
4496 | return TRUE; | |
4497 | } | |
4498 | ||
38b12349 | 4499 | /* Forward declaration. */ |
765e526c | 4500 | static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt; |
38b12349 L |
4501 | |
4502 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all | |
4503 | dynamic relocations. */ | |
4504 | ||
4505 | static long | |
4506 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
4507 | long symcount ATTRIBUTE_UNUSED, | |
4508 | asymbol **syms ATTRIBUTE_UNUSED, | |
4509 | long dynsymcount, | |
4510 | asymbol **dynsyms, | |
4511 | asymbol **ret) | |
4512 | { | |
f493882d | 4513 | long count, i, n; |
38b12349 | 4514 | int j; |
38b12349 | 4515 | bfd_byte *plt_contents; |
f493882d | 4516 | long relsize; |
765e526c L |
4517 | const struct elf_x86_lazy_plt_layout *lazy_plt; |
4518 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
4519 | const struct elf_x86_lazy_plt_layout *lazy_bnd_plt; | |
4520 | const struct elf_x86_non_lazy_plt_layout *non_lazy_bnd_plt; | |
4521 | const struct elf_x86_lazy_plt_layout *lazy_ibt_plt; | |
4522 | const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt; | |
38b12349 | 4523 | asection *plt; |
f493882d L |
4524 | enum elf_x86_plt_type plt_type; |
4525 | struct elf_x86_plt plts[] = | |
144bed8d | 4526 | { |
38b12349 L |
4527 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
4528 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
f2c29a16 L |
4529 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, |
4530 | { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
dd9e66ee | 4531 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } |
38b12349 | 4532 | }; |
144bed8d | 4533 | |
38b12349 | 4534 | *ret = NULL; |
144bed8d | 4535 | |
38b12349 L |
4536 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
4537 | return 0; | |
144bed8d | 4538 | |
38b12349 L |
4539 | if (dynsymcount <= 0) |
4540 | return 0; | |
cca5b8b6 | 4541 | |
38b12349 L |
4542 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
4543 | if (relsize <= 0) | |
4544 | return -1; | |
4545 | ||
3b4c3844 | 4546 | if (get_elf_x86_backend_data (abfd)->target_os != is_nacl) |
144bed8d | 4547 | { |
38b12349 L |
4548 | lazy_plt = &elf_x86_64_lazy_plt; |
4549 | non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
4550 | lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt; | |
4551 | non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt; | |
ee2fdd6f L |
4552 | if (ABI_64_P (abfd)) |
4553 | { | |
4554 | lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; | |
4555 | non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
4556 | } | |
4557 | else | |
4558 | { | |
4559 | lazy_ibt_plt = &elf_x32_lazy_ibt_plt; | |
4560 | non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
4561 | } | |
38b12349 L |
4562 | } |
4563 | else | |
4564 | { | |
4565 | lazy_plt = &elf_x86_64_nacl_plt; | |
4566 | non_lazy_plt = NULL; | |
4567 | lazy_bnd_plt = NULL; | |
4568 | non_lazy_bnd_plt = NULL; | |
ee2fdd6f L |
4569 | lazy_ibt_plt = NULL; |
4570 | non_lazy_ibt_plt = NULL; | |
38b12349 | 4571 | } |
144bed8d | 4572 | |
38b12349 L |
4573 | count = 0; |
4574 | for (j = 0; plts[j].name != NULL; j++) | |
4575 | { | |
4576 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
90efb642 | 4577 | if (plt == NULL || plt->size == 0) |
6f25f223 | 4578 | continue; |
533d0af0 | 4579 | |
38b12349 L |
4580 | /* Get the PLT section contents. */ |
4581 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
4582 | if (plt_contents == NULL) | |
4583 | break; | |
4584 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
4585 | plt_contents, 0, plt->size)) | |
4586 | { | |
4587 | free (plt_contents); | |
4588 | break; | |
4589 | } | |
144bed8d | 4590 | |
38b12349 L |
4591 | /* Check what kind of PLT it is. */ |
4592 | plt_type = plt_unknown; | |
90efb642 L |
4593 | if (plts[j].type == plt_unknown |
4594 | && (plt->size >= (lazy_plt->plt_entry_size | |
4595 | + lazy_plt->plt_entry_size))) | |
144bed8d | 4596 | { |
38b12349 L |
4597 | /* Match lazy PLT first. Need to check the first two |
4598 | instructions. */ | |
4599 | if ((memcmp (plt_contents, lazy_plt->plt0_entry, | |
4600 | lazy_plt->plt0_got1_offset) == 0) | |
4601 | && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6, | |
4602 | 2) == 0)) | |
4603 | plt_type = plt_lazy; | |
4604 | else if (lazy_bnd_plt != NULL | |
4605 | && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry, | |
4606 | lazy_bnd_plt->plt0_got1_offset) == 0) | |
4607 | && (memcmp (plt_contents + 6, | |
4608 | lazy_bnd_plt->plt0_entry + 6, 3) == 0)) | |
ec1f73bb | 4609 | { |
f2c29a16 | 4610 | plt_type = plt_lazy | plt_second; |
ee2fdd6f L |
4611 | /* The fist entry in the lazy IBT PLT is the same as the |
4612 | lazy BND PLT. */ | |
4613 | if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size, | |
4614 | lazy_ibt_plt->plt_entry, | |
4615 | lazy_ibt_plt->plt_got_offset) == 0)) | |
4616 | lazy_plt = lazy_ibt_plt; | |
4617 | else | |
4618 | lazy_plt = lazy_bnd_plt; | |
ec1f73bb | 4619 | } |
144bed8d | 4620 | } |
fca6ae69 | 4621 | |
38b12349 | 4622 | if (non_lazy_plt != NULL |
90efb642 L |
4623 | && (plt_type == plt_unknown || plt_type == plt_non_lazy) |
4624 | && plt->size >= non_lazy_plt->plt_entry_size) | |
38b12349 L |
4625 | { |
4626 | /* Match non-lazy PLT. */ | |
4627 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
4628 | non_lazy_plt->plt_got_offset) == 0) | |
4629 | plt_type = plt_non_lazy; | |
4630 | } | |
4631 | ||
ee2fdd6f | 4632 | if (plt_type == plt_unknown || plt_type == plt_second) |
38b12349 | 4633 | { |
ee2fdd6f | 4634 | if (non_lazy_bnd_plt != NULL |
90efb642 | 4635 | && plt->size >= non_lazy_bnd_plt->plt_entry_size |
ee2fdd6f L |
4636 | && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry, |
4637 | non_lazy_bnd_plt->plt_got_offset) == 0)) | |
38b12349 | 4638 | { |
ee2fdd6f | 4639 | /* Match BND PLT. */ |
f2c29a16 | 4640 | plt_type = plt_second; |
38b12349 L |
4641 | non_lazy_plt = non_lazy_bnd_plt; |
4642 | } | |
ee2fdd6f | 4643 | else if (non_lazy_ibt_plt != NULL |
90efb642 | 4644 | && plt->size >= non_lazy_ibt_plt->plt_entry_size |
ee2fdd6f L |
4645 | && (memcmp (plt_contents, |
4646 | non_lazy_ibt_plt->plt_entry, | |
4647 | non_lazy_ibt_plt->plt_got_offset) == 0)) | |
4648 | { | |
4649 | /* Match IBT PLT. */ | |
4650 | plt_type = plt_second; | |
4651 | non_lazy_plt = non_lazy_ibt_plt; | |
4652 | } | |
38b12349 L |
4653 | } |
4654 | ||
4655 | if (plt_type == plt_unknown) | |
37c0b6ee L |
4656 | { |
4657 | free (plt_contents); | |
4658 | continue; | |
4659 | } | |
38b12349 L |
4660 | |
4661 | plts[j].sec = plt; | |
4662 | plts[j].type = plt_type; | |
4663 | ||
4664 | if ((plt_type & plt_lazy)) | |
4665 | { | |
4666 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
4667 | plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size; | |
4668 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
4669 | /* Skip PLT0 in lazy PLT. */ | |
4670 | i = 1; | |
4671 | } | |
4672 | else | |
4673 | { | |
4674 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
4675 | plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size; | |
4676 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
4677 | i = 0; | |
4678 | } | |
4679 | ||
f2c29a16 L |
4680 | /* Skip lazy PLT when the second PLT is used. */ |
4681 | if (plt_type == (plt_lazy | plt_second)) | |
38b12349 L |
4682 | plts[j].count = 0; |
4683 | else | |
4684 | { | |
4685 | n = plt->size / plts[j].plt_entry_size; | |
4686 | plts[j].count = n; | |
4687 | count += n - i; | |
4688 | } | |
4689 | ||
4690 | plts[j].contents = plt_contents; | |
144bed8d L |
4691 | } |
4692 | ||
f493882d L |
4693 | return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize, |
4694 | (bfd_vma) 0, plts, dynsyms, | |
4695 | ret); | |
0ff2b86e L |
4696 | } |
4697 | ||
d2b2c203 DJ |
4698 | /* Handle an x86-64 specific section when reading an object file. This |
4699 | is called when elfcode.h finds a section with an unknown type. */ | |
4700 | ||
4701 | static bfd_boolean | |
0c723101 L |
4702 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
4703 | const char *name, int shindex) | |
d2b2c203 DJ |
4704 | { |
4705 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
4706 | return FALSE; | |
4707 | ||
6dc132d9 | 4708 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
4709 | return FALSE; |
4710 | ||
4711 | return TRUE; | |
4712 | } | |
4713 | ||
3b22753a L |
4714 | /* Hook called by the linker routine which adds symbols from an object |
4715 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
4716 | of .bss. */ | |
4717 | ||
4718 | static bfd_boolean | |
351f65ca | 4719 | elf_x86_64_add_symbol_hook (bfd *abfd, |
a43942db | 4720 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
351f65ca L |
4721 | Elf_Internal_Sym *sym, |
4722 | const char **namep ATTRIBUTE_UNUSED, | |
4723 | flagword *flagsp ATTRIBUTE_UNUSED, | |
4724 | asection **secp, | |
4725 | bfd_vma *valp) | |
3b22753a L |
4726 | { |
4727 | asection *lcomm; | |
4728 | ||
4729 | switch (sym->st_shndx) | |
4730 | { | |
4731 | case SHN_X86_64_LCOMMON: | |
4732 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
4733 | if (lcomm == NULL) | |
4734 | { | |
4735 | lcomm = bfd_make_section_with_flags (abfd, | |
4736 | "LARGE_COMMON", | |
4737 | (SEC_ALLOC | |
4738 | | SEC_IS_COMMON | |
4739 | | SEC_LINKER_CREATED)); | |
4740 | if (lcomm == NULL) | |
4741 | return FALSE; | |
4742 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
4743 | } | |
4744 | *secp = lcomm; | |
4745 | *valp = sym->st_size; | |
c35bdf6e | 4746 | return TRUE; |
3b22753a | 4747 | } |
d8045f23 | 4748 | |
3b22753a L |
4749 | return TRUE; |
4750 | } | |
4751 | ||
4752 | ||
4753 | /* Given a BFD section, try to locate the corresponding ELF section | |
4754 | index. */ | |
4755 | ||
4756 | static bfd_boolean | |
351f65ca L |
4757 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
4758 | asection *sec, int *index_return) | |
3b22753a L |
4759 | { |
4760 | if (sec == &_bfd_elf_large_com_section) | |
4761 | { | |
91d6fa6a | 4762 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
4763 | return TRUE; |
4764 | } | |
4765 | return FALSE; | |
4766 | } | |
4767 | ||
4768 | /* Process a symbol. */ | |
4769 | ||
4770 | static void | |
351f65ca L |
4771 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
4772 | asymbol *asym) | |
3b22753a L |
4773 | { |
4774 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
4775 | ||
4776 | switch (elfsym->internal_elf_sym.st_shndx) | |
4777 | { | |
4778 | case SHN_X86_64_LCOMMON: | |
4779 | asym->section = &_bfd_elf_large_com_section; | |
4780 | asym->value = elfsym->internal_elf_sym.st_size; | |
4781 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
4782 | asym->flags &= ~BSF_GLOBAL; | |
4783 | break; | |
4784 | } | |
4785 | } | |
4786 | ||
4787 | static bfd_boolean | |
351f65ca | 4788 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
4789 | { |
4790 | return (sym->st_shndx == SHN_COMMON | |
4791 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
4792 | } | |
4793 | ||
4794 | static unsigned int | |
351f65ca | 4795 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
4796 | { |
4797 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
4798 | return SHN_COMMON; | |
4799 | else | |
4800 | return SHN_X86_64_LCOMMON; | |
4801 | } | |
4802 | ||
4803 | static asection * | |
351f65ca | 4804 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
4805 | { |
4806 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
4807 | return bfd_com_section_ptr; | |
4808 | else | |
4809 | return &_bfd_elf_large_com_section; | |
4810 | } | |
4811 | ||
4812 | static bfd_boolean | |
5d13b3b3 AM |
4813 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
4814 | const Elf_Internal_Sym *sym, | |
351f65ca | 4815 | asection **psec, |
5d13b3b3 AM |
4816 | bfd_boolean newdef, |
4817 | bfd_boolean olddef, | |
351f65ca | 4818 | bfd *oldbfd, |
5d13b3b3 | 4819 | const asection *oldsec) |
3b22753a L |
4820 | { |
4821 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
4822 | normal common symbol. We turn the large common symbol into a |
4823 | normal one. */ | |
5d13b3b3 | 4824 | if (!olddef |
3b22753a | 4825 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
4826 | && !newdef |
4827 | && bfd_is_com_section (*psec) | |
4828 | && oldsec != *psec) | |
3b22753a | 4829 | { |
00492999 | 4830 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 4831 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
4832 | { |
4833 | h->root.u.c.p->section | |
4834 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
4835 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
4836 | } | |
4837 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
4838 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
4839 | *psec = bfd_com_section_ptr; | |
3b22753a L |
4840 | } |
4841 | ||
4842 | return TRUE; | |
4843 | } | |
4844 | ||
4845 | static int | |
351f65ca L |
4846 | elf_x86_64_additional_program_headers (bfd *abfd, |
4847 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
4848 | { |
4849 | asection *s; | |
9a2e389a | 4850 | int count = 0; |
3b22753a L |
4851 | |
4852 | /* Check to see if we need a large readonly segment. */ | |
4853 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
4854 | if (s && (s->flags & SEC_LOAD)) | |
4855 | count++; | |
4856 | ||
4857 | /* Check to see if we need a large data segment. Since .lbss sections | |
4858 | is placed right after the .bss section, there should be no need for | |
4859 | a large data segment just because of .lbss. */ | |
4860 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
4861 | if (s && (s->flags & SEC_LOAD)) | |
4862 | count++; | |
4863 | ||
4864 | return count; | |
4865 | } | |
4866 | ||
c543bf9a L |
4867 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
4868 | ||
4869 | static bfd_boolean | |
4870 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
4871 | const bfd_target *output) | |
4872 | { | |
4873 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
4874 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
4875 | && _bfd_elf_relocs_compatible (input, output)); | |
4876 | } | |
4877 | ||
38b12349 L |
4878 | /* Set up x86-64 GNU properties. Return the first relocatable ELF input |
4879 | with GNU properties if found. Otherwise, return NULL. */ | |
4880 | ||
4881 | static bfd * | |
4882 | elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info) | |
4883 | { | |
1de031c8 | 4884 | struct elf_x86_init_table init_table; |
ee2fdd6f | 4885 | |
78984959 L |
4886 | if ((int) R_X86_64_standard >= (int) R_X86_64_converted_reloc_bit |
4887 | || (int) R_X86_64_max <= (int) R_X86_64_converted_reloc_bit | |
4888 | || ((int) (R_X86_64_GNU_VTINHERIT | R_X86_64_converted_reloc_bit) | |
4889 | != (int) R_X86_64_GNU_VTINHERIT) | |
4890 | || ((int) (R_X86_64_GNU_VTENTRY | R_X86_64_converted_reloc_bit) | |
4891 | != (int) R_X86_64_GNU_VTENTRY)) | |
4892 | abort (); | |
4893 | ||
851b6fa1 L |
4894 | /* This is unused for x86-64. */ |
4895 | init_table.plt0_pad_byte = 0x90; | |
4896 | ||
3b4c3844 | 4897 | if (get_elf_x86_backend_data (info->output_bfd)->target_os != is_nacl) |
73784fa5 | 4898 | { |
a6798bab | 4899 | if (info->bndplt) |
ee2fdd6f | 4900 | { |
1de031c8 L |
4901 | init_table.lazy_plt = &elf_x86_64_lazy_bnd_plt; |
4902 | init_table.non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt; | |
ee2fdd6f L |
4903 | } |
4904 | else | |
4905 | { | |
1de031c8 L |
4906 | init_table.lazy_plt = &elf_x86_64_lazy_plt; |
4907 | init_table.non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
ee2fdd6f | 4908 | } |
38b12349 | 4909 | |
a6798bab | 4910 | if (ABI_64_P (info->output_bfd)) |
38b12349 | 4911 | { |
1de031c8 L |
4912 | init_table.lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; |
4913 | init_table.non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
38b12349 L |
4914 | } |
4915 | else | |
4916 | { | |
1de031c8 L |
4917 | init_table.lazy_ibt_plt = &elf_x32_lazy_ibt_plt; |
4918 | init_table.non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
38b12349 | 4919 | } |
38b12349 L |
4920 | } |
4921 | else | |
4922 | { | |
1de031c8 L |
4923 | init_table.lazy_plt = &elf_x86_64_nacl_plt; |
4924 | init_table.non_lazy_plt = NULL; | |
4925 | init_table.lazy_ibt_plt = NULL; | |
4926 | init_table.non_lazy_ibt_plt = NULL; | |
38b12349 L |
4927 | } |
4928 | ||
7a382c1c L |
4929 | if (ABI_64_P (info->output_bfd)) |
4930 | { | |
1de031c8 L |
4931 | init_table.r_info = elf64_r_info; |
4932 | init_table.r_sym = elf64_r_sym; | |
7a382c1c L |
4933 | } |
4934 | else | |
4935 | { | |
1de031c8 L |
4936 | init_table.r_info = elf32_r_info; |
4937 | init_table.r_sym = elf32_r_sym; | |
7a382c1c L |
4938 | } |
4939 | ||
1de031c8 | 4940 | return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table); |
38b12349 L |
4941 | } |
4942 | ||
9a2e389a | 4943 | static const struct bfd_elf_special_section |
46bed679 | 4944 | elf_x86_64_special_sections[]= |
3b22753a | 4945 | { |
0112cd26 NC |
4946 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
4947 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
4948 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
07d6d2b8 | 4949 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
0112cd26 NC |
4950 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
4951 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
07d6d2b8 | 4952 | { NULL, 0, 0, 0, 0 } |
3b22753a L |
4953 | }; |
4954 | ||
6d00b590 | 4955 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
4956 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
4957 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 4958 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 4959 | #define ELF_MACHINE_CODE EM_X86_64 |
f6aec96d L |
4960 | #if DEFAULT_LD_Z_SEPARATE_CODE |
4961 | # define ELF_MAXPAGESIZE 0x1000 | |
4962 | #else | |
4963 | # define ELF_MAXPAGESIZE 0x200000 | |
4964 | #endif | |
2043964e | 4965 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 4966 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
4967 | |
4968 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 4969 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
4970 | #define elf_backend_want_got_plt 1 |
4971 | #define elf_backend_plt_readonly 1 | |
4972 | #define elf_backend_want_plt_sym 0 | |
4973 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 4974 | #define elf_backend_rela_normal 1 |
07d6d2b8 | 4975 | #define elf_backend_plt_alignment 4 |
f7483970 | 4976 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 4977 | #define elf_backend_caches_rawsize 1 |
64f52338 | 4978 | #define elf_backend_dtrel_excludes_plt 1 |
5474d94f | 4979 | #define elf_backend_want_dynrelro 1 |
70256ad8 | 4980 | |
351f65ca | 4981 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 4982 | |
351f65ca | 4983 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 4984 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 4985 | elf_x86_64_reloc_name_lookup |
70256ad8 | 4986 | |
c543bf9a | 4987 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca | 4988 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
38b12349 | 4989 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
351f65ca L |
4990 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections |
4991 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
233cc9c1 | 4992 | #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms |
351f65ca L |
4993 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus |
4994 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
4995 | #ifdef CORE_HEADER |
4996 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
4997 | #endif | |
351f65ca L |
4998 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
4999 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
74541ad4 | 5000 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 5001 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
0ff2b86e | 5002 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 5003 | |
d2b2c203 | 5004 | #define elf_backend_section_from_shdr \ |
351f65ca | 5005 | elf_x86_64_section_from_shdr |
d2b2c203 | 5006 | |
3b22753a | 5007 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 5008 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 5009 | #define elf_backend_add_symbol_hook \ |
351f65ca | 5010 | elf_x86_64_add_symbol_hook |
3b22753a | 5011 | #define elf_backend_symbol_processing \ |
351f65ca | 5012 | elf_x86_64_symbol_processing |
3b22753a | 5013 | #define elf_backend_common_section_index \ |
351f65ca | 5014 | elf_x86_64_common_section_index |
3b22753a | 5015 | #define elf_backend_common_section \ |
351f65ca | 5016 | elf_x86_64_common_section |
3b22753a | 5017 | #define elf_backend_common_definition \ |
351f65ca | 5018 | elf_x86_64_common_definition |
3b22753a | 5019 | #define elf_backend_merge_symbol \ |
351f65ca | 5020 | elf_x86_64_merge_symbol |
3b22753a | 5021 | #define elf_backend_special_sections \ |
351f65ca | 5022 | elf_x86_64_special_sections |
3b22753a | 5023 | #define elf_backend_additional_program_headers \ |
351f65ca | 5024 | elf_x86_64_additional_program_headers |
38b12349 | 5025 | #define elf_backend_setup_gnu_properties \ |
9f857535 L |
5026 | elf_x86_64_link_setup_gnu_properties |
5027 | #define elf_backend_hide_symbol \ | |
5028 | _bfd_x86_elf_hide_symbol | |
3b22753a | 5029 | |
8f56f7a2 L |
5030 | #undef elf64_bed |
5031 | #define elf64_bed elf64_x86_64_bed | |
5032 | ||
8d88c4ca | 5033 | #include "elf64-target.h" |
9d7cbccd | 5034 | |
6036f486 ES |
5035 | /* CloudABI support. */ |
5036 | ||
07d6d2b8 | 5037 | #undef TARGET_LITTLE_SYM |
6036f486 | 5038 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec |
07d6d2b8 | 5039 | #undef TARGET_LITTLE_NAME |
6036f486 ES |
5040 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" |
5041 | ||
5042 | #undef ELF_OSABI | |
5043 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
5044 | ||
07d6d2b8 | 5045 | #undef elf64_bed |
6036f486 ES |
5046 | #define elf64_bed elf64_x86_64_cloudabi_bed |
5047 | ||
5048 | #include "elf64-target.h" | |
5049 | ||
9d7cbccd NC |
5050 | /* FreeBSD support. */ |
5051 | ||
07d6d2b8 | 5052 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5053 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
07d6d2b8 | 5054 | #undef TARGET_LITTLE_NAME |
9d7cbccd NC |
5055 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" |
5056 | ||
d1036acb L |
5057 | #undef ELF_OSABI |
5058 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 5059 | |
07d6d2b8 | 5060 | #undef elf64_bed |
9d7cbccd NC |
5061 | #define elf64_bed elf64_x86_64_fbsd_bed |
5062 | ||
5063 | #include "elf64-target.h" | |
8a9036a4 | 5064 | |
a6cc6b3b RO |
5065 | /* Solaris 2 support. */ |
5066 | ||
5067 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5068 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
5069 | #undef TARGET_LITTLE_NAME |
5070 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
5071 | ||
3b4c3844 L |
5072 | static const struct elf_x86_backend_data elf_x86_64_solaris_arch_bed = |
5073 | { | |
5074 | is_solaris /* os */ | |
5075 | }; | |
5076 | ||
5077 | #undef elf_backend_arch_data | |
5078 | #define elf_backend_arch_data &elf_x86_64_solaris_arch_bed | |
5079 | ||
a6cc6b3b RO |
5080 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE |
5081 | objects won't be recognized. */ | |
5082 | #undef ELF_OSABI | |
5083 | ||
5084 | #undef elf64_bed | |
5085 | #define elf64_bed elf64_x86_64_sol2_bed | |
5086 | ||
7dc98aea RO |
5087 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
5088 | boundary. */ | |
84865015 | 5089 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
5090 | #define elf_backend_static_tls_alignment 16 |
5091 | ||
a6cc6b3b RO |
5092 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
5093 | ||
5094 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
5095 | File, p.63. */ | |
84865015 | 5096 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
5097 | #define elf_backend_want_plt_sym 1 |
5098 | ||
84865015 NC |
5099 | #undef elf_backend_strtab_flags |
5100 | #define elf_backend_strtab_flags SHF_STRINGS | |
5101 | ||
5102 | static bfd_boolean | |
5522f910 NC |
5103 | elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
5104 | bfd *obfd ATTRIBUTE_UNUSED, | |
5105 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
5106 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
5107 | { |
5108 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
5109 | and sh_link fields of Solaris specific section types. */ | |
5110 | return FALSE; | |
5111 | } | |
5112 | ||
5522f910 NC |
5113 | #undef elf_backend_copy_special_section_fields |
5114 | #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields | |
84865015 | 5115 | |
a6cc6b3b RO |
5116 | #include "elf64-target.h" |
5117 | ||
8059fb19 RM |
5118 | /* Native Client support. */ |
5119 | ||
64b384e1 RM |
5120 | static bfd_boolean |
5121 | elf64_x86_64_nacl_elf_object_p (bfd *abfd) | |
5122 | { | |
5123 | /* Set the right machine number for a NaCl x86-64 ELF64 file. */ | |
5124 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl); | |
5125 | return TRUE; | |
5126 | } | |
5127 | ||
8059fb19 | 5128 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5129 | #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec |
8059fb19 RM |
5130 | #undef TARGET_LITTLE_NAME |
5131 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
5132 | #undef elf64_bed | |
5133 | #define elf64_bed elf64_x86_64_nacl_bed | |
5134 | ||
5135 | #undef ELF_MAXPAGESIZE | |
5136 | #undef ELF_MINPAGESIZE | |
5137 | #undef ELF_COMMONPAGESIZE | |
5138 | #define ELF_MAXPAGESIZE 0x10000 | |
5139 | #define ELF_MINPAGESIZE 0x10000 | |
5140 | #define ELF_COMMONPAGESIZE 0x10000 | |
5141 | ||
5142 | /* Restore defaults. */ | |
5143 | #undef ELF_OSABI | |
5144 | #undef elf_backend_static_tls_alignment | |
5145 | #undef elf_backend_want_plt_sym | |
5146 | #define elf_backend_want_plt_sym 0 | |
84865015 | 5147 | #undef elf_backend_strtab_flags |
5522f910 | 5148 | #undef elf_backend_copy_special_section_fields |
8059fb19 RM |
5149 | |
5150 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
5151 | ||
5152 | #undef elf_backend_plt_alignment | |
5153 | #define elf_backend_plt_alignment 5 | |
5154 | #define NACL_PLT_ENTRY_SIZE 64 | |
5155 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
5156 | ||
5157 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
5158 | { | |
07d6d2b8 | 5159 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
8059fb19 | 5160 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ |
07d6d2b8 AM |
5161 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ |
5162 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5163 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
8059fb19 | 5164 | |
ea2d813e | 5165 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
70cc877f | 5166 | 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */ |
ea2d813e RM |
5167 | |
5168 | /* 32 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 5169 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 5170 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 5171 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 5172 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
07d6d2b8 AM |
5173 | 0x66, /* excess data16 prefix */ |
5174 | 0x90 /* nop */ | |
8059fb19 RM |
5175 | }; |
5176 | ||
5177 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
5178 | { | |
5179 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
07d6d2b8 AM |
5180 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ |
5181 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5182 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
8059fb19 RM |
5183 | |
5184 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
3ddf1bdd | 5185 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
5186 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
5187 | ||
5188 | /* Lazy GOT entries point here (32-byte aligned). */ | |
07d6d2b8 AM |
5189 | 0x68, /* pushq immediate */ |
5190 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
5191 | 0xe9, /* jmp relative */ | |
5192 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
8059fb19 | 5193 | |
07d6d2b8 | 5194 | /* 22 bytes of nop to pad out to the standard size. */ |
3ddf1bdd | 5195 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 5196 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
07d6d2b8 | 5197 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ |
8059fb19 RM |
5198 | }; |
5199 | ||
5200 | /* .eh_frame covering the .plt section. */ | |
5201 | ||
5202 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
5203 | { | |
07d6d2b8 AM |
5204 | #if (PLT_CIE_LENGTH != 20 \ |
5205 | || PLT_FDE_LENGTH != 36 \ | |
5206 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
8059fb19 | 5207 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) |
851b6fa1 | 5208 | # error "Need elf_x86_backend_data parameters for eh_frame_plt offsets!" |
8059fb19 RM |
5209 | #endif |
5210 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
5211 | 0, 0, 0, 0, /* CIE ID */ | |
5212 | 1, /* CIE version */ | |
07d6d2b8 | 5213 | 'z', 'R', 0, /* Augmentation string */ |
8059fb19 | 5214 | 1, /* Code alignment factor */ |
07d6d2b8 | 5215 | 0x78, /* Data alignment factor */ |
8059fb19 RM |
5216 | 16, /* Return address column */ |
5217 | 1, /* Augmentation size */ | |
5218 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
5219 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
5220 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
5221 | DW_CFA_nop, DW_CFA_nop, | |
5222 | ||
5223 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
5224 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
5225 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
5226 | 0, 0, 0, 0, /* .plt size goes here */ | |
5227 | 0, /* Augmentation size */ | |
5228 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
5229 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
5230 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
5231 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
5232 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
5233 | 13, /* Block length */ | |
5234 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
5235 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
5236 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
5237 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
5238 | DW_CFA_nop, DW_CFA_nop | |
5239 | }; | |
5240 | ||
765e526c | 5241 | static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt = |
8059fb19 | 5242 | { |
07d6d2b8 AM |
5243 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ |
5244 | NACL_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
5245 | elf_x86_64_nacl_plt_entry, /* plt_entry */ | |
5246 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
5247 | 2, /* plt0_got1_offset */ | |
5248 | 9, /* plt0_got2_offset */ | |
5249 | 13, /* plt0_got2_insn_end */ | |
5250 | 3, /* plt_got_offset */ | |
5251 | 33, /* plt_reloc_offset */ | |
5252 | 38, /* plt_plt_offset */ | |
5253 | 7, /* plt_got_insn_size */ | |
5254 | 42, /* plt_plt_insn_end */ | |
5255 | 32, /* plt_lazy_offset */ | |
5256 | elf_x86_64_nacl_plt0_entry, /* pic_plt0_entry */ | |
5257 | elf_x86_64_nacl_plt_entry, /* pic_plt_entry */ | |
5258 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ | |
38b12349 L |
5259 | sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */ |
5260 | }; | |
5261 | ||
851b6fa1 | 5262 | static const struct elf_x86_backend_data elf_x86_64_nacl_arch_bed = |
38b12349 | 5263 | { |
07d6d2b8 | 5264 | is_nacl /* os */ |
8059fb19 RM |
5265 | }; |
5266 | ||
5267 | #undef elf_backend_arch_data | |
5268 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
5269 | ||
64b384e1 RM |
5270 | #undef elf_backend_object_p |
5271 | #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p | |
5a68afcf RM |
5272 | #undef elf_backend_modify_segment_map |
5273 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
5274 | #undef elf_backend_modify_program_headers | |
5275 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
5276 | #undef elf_backend_final_write_processing |
5277 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 5278 | |
8059fb19 RM |
5279 | #include "elf64-target.h" |
5280 | ||
5281 | /* Native Client x32 support. */ | |
5282 | ||
64b384e1 RM |
5283 | static bfd_boolean |
5284 | elf32_x86_64_nacl_elf_object_p (bfd *abfd) | |
5285 | { | |
5286 | /* Set the right machine number for a NaCl x86-64 ELF32 file. */ | |
5287 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl); | |
5288 | return TRUE; | |
5289 | } | |
5290 | ||
07d6d2b8 | 5291 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5292 | #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec |
07d6d2b8 | 5293 | #undef TARGET_LITTLE_NAME |
8059fb19 RM |
5294 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" |
5295 | #undef elf32_bed | |
5296 | #define elf32_bed elf32_x86_64_nacl_bed | |
5297 | ||
8059fb19 RM |
5298 | #define bfd_elf32_bfd_reloc_type_lookup \ |
5299 | elf_x86_64_reloc_type_lookup | |
5300 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
5301 | elf_x86_64_reloc_name_lookup | |
b7365e5d L |
5302 | #define bfd_elf32_get_synthetic_symtab \ |
5303 | elf_x86_64_get_synthetic_symtab | |
8059fb19 RM |
5304 | |
5305 | #undef elf_backend_object_p | |
5306 | #define elf_backend_object_p \ | |
64b384e1 | 5307 | elf32_x86_64_nacl_elf_object_p |
8059fb19 RM |
5308 | |
5309 | #undef elf_backend_bfd_from_remote_memory | |
5310 | #define elf_backend_bfd_from_remote_memory \ | |
5311 | _bfd_elf32_bfd_from_remote_memory | |
5312 | ||
5313 | #undef elf_backend_size_info | |
5314 | #define elf_backend_size_info \ | |
5315 | _bfd_elf32_size_info | |
5316 | ||
8f56f7a2 L |
5317 | #undef elf32_bed |
5318 | #define elf32_bed elf32_x86_64_bed | |
5319 | ||
8059fb19 RM |
5320 | #include "elf32-target.h" |
5321 | ||
5322 | /* Restore defaults. */ | |
5a68afcf | 5323 | #undef elf_backend_object_p |
8059fb19 | 5324 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
5325 | #undef elf_backend_bfd_from_remote_memory |
5326 | #undef elf_backend_size_info | |
5327 | #undef elf_backend_modify_segment_map | |
5328 | #undef elf_backend_modify_program_headers | |
887badb3 | 5329 | #undef elf_backend_final_write_processing |
8059fb19 | 5330 | |
8a9036a4 L |
5331 | /* Intel L1OM support. */ |
5332 | ||
5333 | static bfd_boolean | |
5334 | elf64_l1om_elf_object_p (bfd *abfd) | |
5335 | { | |
5336 | /* Set the right machine number for an L1OM elf64 file. */ | |
5337 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
5338 | return TRUE; | |
5339 | } | |
5340 | ||
5341 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5342 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
5343 | #undef TARGET_LITTLE_NAME |
5344 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
5345 | #undef ELF_ARCH | |
5346 | #define ELF_ARCH bfd_arch_l1om | |
5347 | ||
5348 | #undef ELF_MACHINE_CODE | |
5349 | #define ELF_MACHINE_CODE EM_L1OM | |
5350 | ||
5351 | #undef ELF_OSABI | |
5352 | ||
5353 | #undef elf64_bed | |
5354 | #define elf64_bed elf64_l1om_bed | |
5355 | ||
5356 | #undef elf_backend_object_p | |
5357 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
5358 | ||
8059fb19 RM |
5359 | /* Restore defaults. */ |
5360 | #undef ELF_MAXPAGESIZE | |
5361 | #undef ELF_MINPAGESIZE | |
5362 | #undef ELF_COMMONPAGESIZE | |
f6aec96d L |
5363 | #if DEFAULT_LD_Z_SEPARATE_CODE |
5364 | # define ELF_MAXPAGESIZE 0x1000 | |
5365 | #else | |
5366 | # define ELF_MAXPAGESIZE 0x200000 | |
5367 | #endif | |
8059fb19 RM |
5368 | #define ELF_MINPAGESIZE 0x1000 |
5369 | #define ELF_COMMONPAGESIZE 0x1000 | |
5370 | #undef elf_backend_plt_alignment | |
5371 | #define elf_backend_plt_alignment 4 | |
5372 | #undef elf_backend_arch_data | |
5373 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 5374 | |
8a9036a4 L |
5375 | #include "elf64-target.h" |
5376 | ||
5377 | /* FreeBSD L1OM support. */ | |
5378 | ||
5379 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5380 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
5381 | #undef TARGET_LITTLE_NAME |
5382 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
5383 | ||
5384 | #undef ELF_OSABI | |
5385 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5386 | ||
5387 | #undef elf64_bed | |
5388 | #define elf64_bed elf64_l1om_fbsd_bed | |
5389 | ||
8a9036a4 | 5390 | #include "elf64-target.h" |
351f65ca | 5391 | |
7a9068fe L |
5392 | /* Intel K1OM support. */ |
5393 | ||
5394 | static bfd_boolean | |
5395 | elf64_k1om_elf_object_p (bfd *abfd) | |
5396 | { | |
5397 | /* Set the right machine number for an K1OM elf64 file. */ | |
5398 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
5399 | return TRUE; | |
5400 | } | |
5401 | ||
5402 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5403 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
5404 | #undef TARGET_LITTLE_NAME |
5405 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
5406 | #undef ELF_ARCH | |
5407 | #define ELF_ARCH bfd_arch_k1om | |
5408 | ||
5409 | #undef ELF_MACHINE_CODE | |
5410 | #define ELF_MACHINE_CODE EM_K1OM | |
5411 | ||
5412 | #undef ELF_OSABI | |
5413 | ||
5414 | #undef elf64_bed | |
5415 | #define elf64_bed elf64_k1om_bed | |
5416 | ||
5417 | #undef elf_backend_object_p | |
5418 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
5419 | ||
5420 | #undef elf_backend_static_tls_alignment | |
5421 | ||
5422 | #undef elf_backend_want_plt_sym | |
5423 | #define elf_backend_want_plt_sym 0 | |
5424 | ||
5425 | #include "elf64-target.h" | |
5426 | ||
5427 | /* FreeBSD K1OM support. */ | |
5428 | ||
5429 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5430 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
5431 | #undef TARGET_LITTLE_NAME |
5432 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
5433 | ||
5434 | #undef ELF_OSABI | |
5435 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5436 | ||
5437 | #undef elf64_bed | |
5438 | #define elf64_bed elf64_k1om_fbsd_bed | |
5439 | ||
5440 | #include "elf64-target.h" | |
5441 | ||
351f65ca L |
5442 | /* 32bit x86-64 support. */ |
5443 | ||
351f65ca | 5444 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5445 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
5446 | #undef TARGET_LITTLE_NAME |
5447 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 5448 | #undef elf32_bed |
351f65ca L |
5449 | |
5450 | #undef ELF_ARCH | |
5451 | #define ELF_ARCH bfd_arch_i386 | |
5452 | ||
5453 | #undef ELF_MACHINE_CODE | |
5454 | #define ELF_MACHINE_CODE EM_X86_64 | |
5455 | ||
351f65ca L |
5456 | #undef ELF_OSABI |
5457 | ||
351f65ca L |
5458 | #undef elf_backend_object_p |
5459 | #define elf_backend_object_p \ | |
5460 | elf32_x86_64_elf_object_p | |
5461 | ||
5462 | #undef elf_backend_bfd_from_remote_memory | |
5463 | #define elf_backend_bfd_from_remote_memory \ | |
5464 | _bfd_elf32_bfd_from_remote_memory | |
5465 | ||
5466 | #undef elf_backend_size_info | |
5467 | #define elf_backend_size_info \ | |
5468 | _bfd_elf32_size_info | |
5469 | ||
5470 | #include "elf32-target.h" |