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351f65ca | 1 | /* X86-64 specific support for ELF |
2571583a | 2 | Copyright (C) 2000-2017 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 | ||
d8045f23 NC |
199 | #define IS_X86_64_PCREL_TYPE(TYPE) \ |
200 | ( ((TYPE) == R_X86_64_PC8) \ | |
201 | || ((TYPE) == R_X86_64_PC16) \ | |
202 | || ((TYPE) == R_X86_64_PC32) \ | |
c3320543 | 203 | || ((TYPE) == R_X86_64_PC32_BND) \ |
d8045f23 NC |
204 | || ((TYPE) == R_X86_64_PC64)) |
205 | ||
8d88c4ca | 206 | /* Map BFD relocs to the x86_64 elf relocs. */ |
70256ad8 AJ |
207 | struct elf_reloc_map |
208 | { | |
8d88c4ca NC |
209 | bfd_reloc_code_real_type bfd_reloc_val; |
210 | unsigned char elf_reloc_val; | |
211 | }; | |
212 | ||
dc810e39 | 213 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 214 | { |
70256ad8 AJ |
215 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
216 | { BFD_RELOC_64, R_X86_64_64, }, | |
217 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
218 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
219 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
220 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
221 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
222 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
223 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
224 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
225 | { BFD_RELOC_32, R_X86_64_32, }, | |
226 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
227 | { BFD_RELOC_16, R_X86_64_16, }, | |
228 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
229 | { BFD_RELOC_8, R_X86_64_8, }, | |
230 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
231 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
232 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
233 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
234 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
235 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
236 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
237 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
238 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
239 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
240 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
241 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
242 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
243 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
244 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
245 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
246 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
1788fc08 L |
247 | { BFD_RELOC_SIZE32, R_X86_64_SIZE32, }, |
248 | { BFD_RELOC_SIZE64, R_X86_64_SIZE64, }, | |
67a4f2b7 AO |
249 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
250 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
251 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
cbe950e9 | 252 | { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, }, |
56ceb5b5 L |
253 | { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND, }, |
254 | { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND, }, | |
255 | { BFD_RELOC_X86_64_GOTPCRELX, R_X86_64_GOTPCRELX, }, | |
256 | { BFD_RELOC_X86_64_REX_GOTPCRELX, R_X86_64_REX_GOTPCRELX, }, | |
fe4770f4 AJ |
257 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
258 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
259 | }; |
260 | ||
67a4f2b7 | 261 | static reloc_howto_type * |
351f65ca | 262 | elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) |
67a4f2b7 AO |
263 | { |
264 | unsigned i; | |
265 | ||
d7921315 L |
266 | if (r_type == (unsigned int) R_X86_64_32) |
267 | { | |
268 | if (ABI_64_P (abfd)) | |
269 | i = r_type; | |
270 | else | |
271 | i = ARRAY_SIZE (x86_64_elf_howto_table) - 1; | |
272 | } | |
273 | else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
274 | || r_type >= (unsigned int) R_X86_64_max) | |
67a4f2b7 AO |
275 | { |
276 | if (r_type >= (unsigned int) R_X86_64_standard) | |
277 | { | |
695344c0 | 278 | /* xgettext:c-format */ |
4eca0228 AM |
279 | _bfd_error_handler (_("%B: invalid relocation type %d"), |
280 | abfd, (int) r_type); | |
67a4f2b7 AO |
281 | r_type = R_X86_64_NONE; |
282 | } | |
283 | i = r_type; | |
284 | } | |
285 | else | |
286 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
287 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
288 | return &x86_64_elf_howto_table[i]; | |
289 | } | |
8d88c4ca NC |
290 | |
291 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
292 | static reloc_howto_type * | |
351f65ca L |
293 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
294 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
295 | { |
296 | unsigned int i; | |
27482721 | 297 | |
8d88c4ca NC |
298 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
299 | i++) | |
300 | { | |
301 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
302 | return elf_x86_64_rtype_to_howto (abfd, |
303 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca | 304 | } |
5860e3f8 | 305 | return NULL; |
8d88c4ca NC |
306 | } |
307 | ||
157090f7 | 308 | static reloc_howto_type * |
d7921315 | 309 | elf_x86_64_reloc_name_lookup (bfd *abfd, |
351f65ca | 310 | const char *r_name) |
157090f7 AM |
311 | { |
312 | unsigned int i; | |
313 | ||
d7921315 L |
314 | if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0) |
315 | { | |
316 | /* Get x32 R_X86_64_32. */ | |
317 | reloc_howto_type *reloc | |
318 | = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1]; | |
319 | BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32); | |
320 | return reloc; | |
321 | } | |
322 | ||
323 | for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++) | |
157090f7 AM |
324 | if (x86_64_elf_howto_table[i].name != NULL |
325 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
326 | return &x86_64_elf_howto_table[i]; | |
327 | ||
328 | return NULL; | |
329 | } | |
330 | ||
8d88c4ca | 331 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 332 | |
8d88c4ca | 333 | static void |
351f65ca L |
334 | elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
335 | Elf_Internal_Rela *dst) | |
8d88c4ca | 336 | { |
67a4f2b7 | 337 | unsigned r_type; |
8d88c4ca | 338 | |
351f65ca L |
339 | r_type = ELF32_R_TYPE (dst->r_info); |
340 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); | |
8d88c4ca NC |
341 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
342 | } | |
70256ad8 | 343 | \f |
3bab7989 | 344 | /* Support for core dump NOTE sections. */ |
b34976b6 | 345 | static bfd_boolean |
351f65ca | 346 | elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
347 | { |
348 | int offset; | |
eea6121a | 349 | size_t size; |
3bab7989 ML |
350 | |
351 | switch (note->descsz) | |
352 | { | |
353 | default: | |
b34976b6 | 354 | return FALSE; |
3bab7989 | 355 | |
bcd823f1 L |
356 | case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */ |
357 | /* pr_cursig */ | |
228e534f | 358 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
bcd823f1 L |
359 | |
360 | /* pr_pid */ | |
228e534f | 361 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
bcd823f1 L |
362 | |
363 | /* pr_reg */ | |
364 | offset = 72; | |
365 | size = 216; | |
366 | ||
367 | break; | |
368 | ||
3bab7989 ML |
369 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ |
370 | /* pr_cursig */ | |
228e534f | 371 | elf_tdata (abfd)->core->signal |
3bab7989 ML |
372 | = bfd_get_16 (abfd, note->descdata + 12); |
373 | ||
374 | /* pr_pid */ | |
228e534f | 375 | elf_tdata (abfd)->core->lwpid |
3bab7989 ML |
376 | = bfd_get_32 (abfd, note->descdata + 32); |
377 | ||
378 | /* pr_reg */ | |
379 | offset = 112; | |
eea6121a | 380 | size = 216; |
3bab7989 ML |
381 | |
382 | break; | |
383 | } | |
384 | ||
385 | /* Make a ".reg/999" section. */ | |
386 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 387 | size, note->descpos + offset); |
3bab7989 ML |
388 | } |
389 | ||
b34976b6 | 390 | static bfd_boolean |
351f65ca | 391 | elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
392 | { |
393 | switch (note->descsz) | |
394 | { | |
395 | default: | |
b34976b6 | 396 | return FALSE; |
3bab7989 | 397 | |
bcd823f1 | 398 | case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */ |
228e534f | 399 | elf_tdata (abfd)->core->pid |
bcd823f1 | 400 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 401 | elf_tdata (abfd)->core->program |
bcd823f1 | 402 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 403 | elf_tdata (abfd)->core->command |
bcd823f1 L |
404 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
405 | break; | |
406 | ||
3bab7989 | 407 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ |
228e534f | 408 | elf_tdata (abfd)->core->pid |
261b8d08 | 409 | = bfd_get_32 (abfd, note->descdata + 24); |
228e534f | 410 | elf_tdata (abfd)->core->program |
3bab7989 | 411 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
228e534f | 412 | elf_tdata (abfd)->core->command |
3bab7989 ML |
413 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
414 | } | |
415 | ||
416 | /* Note that for some reason, a spurious space is tacked | |
417 | onto the end of the args in some (at least one anyway) | |
418 | implementations, so strip it off if it exists. */ | |
419 | ||
420 | { | |
228e534f | 421 | char *command = elf_tdata (abfd)->core->command; |
3bab7989 ML |
422 | int n = strlen (command); |
423 | ||
424 | if (0 < n && command[n - 1] == ' ') | |
425 | command[n - 1] = '\0'; | |
426 | } | |
427 | ||
b34976b6 | 428 | return TRUE; |
3bab7989 | 429 | } |
8fd79e71 L |
430 | |
431 | #ifdef CORE_HEADER | |
432 | static char * | |
433 | elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz, | |
434 | int note_type, ...) | |
435 | { | |
436 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8fd79e71 L |
437 | va_list ap; |
438 | const char *fname, *psargs; | |
439 | long pid; | |
440 | int cursig; | |
441 | const void *gregs; | |
442 | ||
443 | switch (note_type) | |
444 | { | |
445 | default: | |
446 | return NULL; | |
447 | ||
448 | case NT_PRPSINFO: | |
449 | va_start (ap, note_type); | |
450 | fname = va_arg (ap, const char *); | |
451 | psargs = va_arg (ap, const char *); | |
452 | va_end (ap); | |
453 | ||
454 | if (bed->s->elfclass == ELFCLASS32) | |
455 | { | |
456 | prpsinfo32_t data; | |
457 | memset (&data, 0, sizeof (data)); | |
458 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
459 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
460 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
461 | &data, sizeof (data)); | |
8fd79e71 L |
462 | } |
463 | else | |
464 | { | |
b1bd052d | 465 | prpsinfo64_t data; |
8fd79e71 L |
466 | memset (&data, 0, sizeof (data)); |
467 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
468 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
469 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
470 | &data, sizeof (data)); | |
8fd79e71 | 471 | } |
e85c6a70 | 472 | /* NOTREACHED */ |
8fd79e71 L |
473 | |
474 | case NT_PRSTATUS: | |
475 | va_start (ap, note_type); | |
476 | pid = va_arg (ap, long); | |
477 | cursig = va_arg (ap, int); | |
478 | gregs = va_arg (ap, const void *); | |
479 | va_end (ap); | |
480 | ||
481 | if (bed->s->elfclass == ELFCLASS32) | |
482 | { | |
483 | if (bed->elf_machine_code == EM_X86_64) | |
484 | { | |
485 | prstatusx32_t prstat; | |
486 | memset (&prstat, 0, sizeof (prstat)); | |
487 | prstat.pr_pid = pid; | |
488 | prstat.pr_cursig = cursig; | |
489 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
490 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
491 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
492 | } |
493 | else | |
494 | { | |
495 | prstatus32_t prstat; | |
496 | memset (&prstat, 0, sizeof (prstat)); | |
497 | prstat.pr_pid = pid; | |
498 | prstat.pr_cursig = cursig; | |
499 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
500 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
501 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
502 | } |
503 | } | |
504 | else | |
505 | { | |
b1bd052d | 506 | prstatus64_t prstat; |
8fd79e71 L |
507 | memset (&prstat, 0, sizeof (prstat)); |
508 | prstat.pr_pid = pid; | |
509 | prstat.pr_cursig = cursig; | |
510 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
511 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
512 | &prstat, sizeof (prstat)); | |
8fd79e71 | 513 | } |
8fd79e71 | 514 | } |
e85c6a70 | 515 | /* NOTREACHED */ |
8fd79e71 L |
516 | } |
517 | #endif | |
3bab7989 | 518 | \f |
407443a3 | 519 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 520 | |
70256ad8 AJ |
521 | /* The size in bytes of an entry in the global offset table. */ |
522 | ||
523 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 524 | |
38b12349 | 525 | /* The size in bytes of an entry in the lazy procedure linkage table. */ |
8d88c4ca | 526 | |
38b12349 | 527 | #define LAZY_PLT_ENTRY_SIZE 16 |
70256ad8 | 528 | |
38b12349 L |
529 | /* The size in bytes of an entry in the non-lazy procedure linkage |
530 | table. */ | |
70256ad8 | 531 | |
38b12349 L |
532 | #define NON_LAZY_PLT_ENTRY_SIZE 8 |
533 | ||
534 | /* The first entry in a lazy procedure linkage table looks like this. | |
535 | See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this | |
536 | works. */ | |
537 | ||
538 | static const bfd_byte elf_x86_64_lazy_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
70256ad8 | 539 | { |
653165cc AJ |
540 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
541 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 542 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
543 | }; |
544 | ||
38b12349 | 545 | /* Subsequent entries in a lazy procedure linkage table look like this. */ |
70256ad8 | 546 | |
38b12349 | 547 | static const bfd_byte elf_x86_64_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
70256ad8 | 548 | { |
653165cc | 549 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 550 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 551 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
552 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
553 | 0xe9, /* jmp relative */ | |
554 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
555 | }; | |
556 | ||
38b12349 | 557 | /* The first entry in a lazy procedure linkage table with BND prefix |
0ff2b86e L |
558 | like this. */ |
559 | ||
38b12349 | 560 | static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e L |
561 | { |
562 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
563 | 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */ | |
564 | 0x0f, 0x1f, 0 /* nopl (%rax) */ | |
565 | }; | |
566 | ||
38b12349 L |
567 | /* Subsequent entries for branches with BND prefx in a lazy procedure |
568 | linkage table look like this. */ | |
0ff2b86e | 569 | |
38b12349 | 570 | static const bfd_byte elf_x86_64_lazy_bnd_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e L |
571 | { |
572 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
573 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
574 | 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */ | |
575 | }; | |
576 | ||
ee2fdd6f L |
577 | /* The first entry in the IBT-enabled lazy procedure linkage table is the |
578 | the same as the lazy PLT with BND prefix so that bound registers are | |
579 | preserved when control is passed to dynamic linker. Subsequent | |
580 | entries for a IBT-enabled lazy procedure linkage table look like | |
581 | this. */ | |
582 | ||
583 | static const bfd_byte elf_x86_64_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
584 | { | |
585 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
586 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
587 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
588 | 0x90 /* nop */ | |
589 | }; | |
590 | ||
591 | /* The first entry in the x32 IBT-enabled lazy procedure linkage table | |
de194d85 | 592 | is the same as the normal lazy PLT. Subsequent entries for an |
ee2fdd6f L |
593 | x32 IBT-enabled lazy procedure linkage table look like this. */ |
594 | ||
595 | static const bfd_byte elf_x32_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
596 | { | |
597 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
598 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
599 | 0xe9, 0, 0, 0, 0, /* jmpq relative */ | |
600 | 0x66, 0x90 /* xchg %ax,%ax */ | |
601 | }; | |
602 | ||
38b12349 | 603 | /* Entries in the non-lazey procedure linkage table look like this. */ |
0ff2b86e | 604 | |
38b12349 | 605 | static const bfd_byte elf_x86_64_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 606 | { |
38b12349 L |
607 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
608 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
609 | 0x66, 0x90 /* xchg %ax,%ax */ | |
0ff2b86e L |
610 | }; |
611 | ||
38b12349 L |
612 | /* Entries for branches with BND prefix in the non-lazey procedure |
613 | linkage table look like this. */ | |
0ff2b86e | 614 | |
38b12349 | 615 | static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 616 | { |
38b12349 L |
617 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ |
618 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
619 | 0x90 /* nop */ | |
0ff2b86e L |
620 | }; |
621 | ||
ee2fdd6f L |
622 | /* Entries for branches with IBT-enabled in the non-lazey procedure |
623 | linkage table look like this. They have the same size as the lazy | |
624 | PLT entry. */ | |
625 | ||
626 | static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
627 | { | |
628 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
629 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ | |
630 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
631 | 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */ | |
632 | }; | |
633 | ||
634 | /* Entries for branches with IBT-enabled in the x32 non-lazey procedure | |
635 | linkage table look like this. They have the same size as the lazy | |
636 | PLT entry. */ | |
637 | ||
638 | static const bfd_byte elf_x32_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
639 | { | |
640 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
641 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ | |
642 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
643 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
644 | }; | |
645 | ||
38b12349 | 646 | /* .eh_frame covering the lazy .plt section. */ |
e41b3a13 | 647 | |
38b12349 | 648 | static const bfd_byte elf_x86_64_eh_frame_lazy_plt[] = |
e41b3a13 JJ |
649 | { |
650 | #define PLT_CIE_LENGTH 20 | |
651 | #define PLT_FDE_LENGTH 36 | |
652 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
653 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
654 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
655 | 0, 0, 0, 0, /* CIE ID */ | |
656 | 1, /* CIE version */ | |
657 | 'z', 'R', 0, /* Augmentation string */ | |
658 | 1, /* Code alignment factor */ | |
659 | 0x78, /* Data alignment factor */ | |
660 | 16, /* Return address column */ | |
661 | 1, /* Augmentation size */ | |
662 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
663 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
664 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
665 | DW_CFA_nop, DW_CFA_nop, | |
666 | ||
667 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
668 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
669 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
670 | 0, 0, 0, 0, /* .plt size goes here */ | |
671 | 0, /* Augmentation size */ | |
672 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
673 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
674 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
675 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
676 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
677 | 11, /* Block length */ | |
678 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
679 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
680 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
681 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
682 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
683 | }; | |
684 | ||
38b12349 | 685 | /* .eh_frame covering the lazy BND .plt section. */ |
9e659176 | 686 | |
38b12349 | 687 | static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt[] = |
9e659176 L |
688 | { |
689 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
690 | 0, 0, 0, 0, /* CIE ID */ | |
691 | 1, /* CIE version */ | |
692 | 'z', 'R', 0, /* Augmentation string */ | |
693 | 1, /* Code alignment factor */ | |
694 | 0x78, /* Data alignment factor */ | |
695 | 16, /* Return address column */ | |
696 | 1, /* Augmentation size */ | |
697 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
698 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
699 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
700 | DW_CFA_nop, DW_CFA_nop, | |
701 | ||
702 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
703 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
704 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
705 | 0, 0, 0, 0, /* .plt size goes here */ | |
706 | 0, /* Augmentation size */ | |
707 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
708 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
709 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
710 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
711 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
712 | 11, /* Block length */ | |
713 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
714 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
715 | DW_OP_lit15, DW_OP_and, DW_OP_lit5, DW_OP_ge, | |
716 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
717 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
718 | }; | |
719 | ||
ee2fdd6f L |
720 | /* .eh_frame covering the lazy .plt section with IBT-enabled. */ |
721 | ||
722 | static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt[] = | |
723 | { | |
724 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
725 | 0, 0, 0, 0, /* CIE ID */ | |
726 | 1, /* CIE version */ | |
727 | 'z', 'R', 0, /* Augmentation string */ | |
728 | 1, /* Code alignment factor */ | |
729 | 0x78, /* Data alignment factor */ | |
730 | 16, /* Return address column */ | |
731 | 1, /* Augmentation size */ | |
732 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
733 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
734 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
735 | DW_CFA_nop, DW_CFA_nop, | |
736 | ||
737 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
738 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
739 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
740 | 0, 0, 0, 0, /* .plt size goes here */ | |
741 | 0, /* Augmentation size */ | |
742 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
743 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
744 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
745 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
746 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
747 | 11, /* Block length */ | |
748 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
749 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
750 | DW_OP_lit15, DW_OP_and, DW_OP_lit10, DW_OP_ge, | |
751 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
752 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
753 | }; | |
754 | ||
755 | /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */ | |
756 | ||
757 | static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt[] = | |
758 | { | |
759 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
760 | 0, 0, 0, 0, /* CIE ID */ | |
761 | 1, /* CIE version */ | |
762 | 'z', 'R', 0, /* Augmentation string */ | |
763 | 1, /* Code alignment factor */ | |
764 | 0x78, /* Data alignment factor */ | |
765 | 16, /* Return address column */ | |
766 | 1, /* Augmentation size */ | |
767 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
768 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
769 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
770 | DW_CFA_nop, DW_CFA_nop, | |
771 | ||
772 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
773 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
774 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
775 | 0, 0, 0, 0, /* .plt size goes here */ | |
776 | 0, /* Augmentation size */ | |
777 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
778 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
779 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
780 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
781 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
782 | 11, /* Block length */ | |
783 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
784 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
785 | DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge, | |
786 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
787 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
788 | }; | |
789 | ||
38b12349 | 790 | /* .eh_frame covering the non-lazy .plt section. */ |
fff53dae | 791 | |
38b12349 | 792 | static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt[] = |
fff53dae L |
793 | { |
794 | #define PLT_GOT_FDE_LENGTH 20 | |
795 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
796 | 0, 0, 0, 0, /* CIE ID */ | |
797 | 1, /* CIE version */ | |
798 | 'z', 'R', 0, /* Augmentation string */ | |
799 | 1, /* Code alignment factor */ | |
800 | 0x78, /* Data alignment factor */ | |
801 | 16, /* Return address column */ | |
802 | 1, /* Augmentation size */ | |
803 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
804 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
805 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
806 | DW_CFA_nop, DW_CFA_nop, | |
807 | ||
808 | PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
809 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
38b12349 L |
810 | 0, 0, 0, 0, /* the start of non-lazy .plt goes here */ |
811 | 0, 0, 0, 0, /* non-lazy .plt size goes here */ | |
fff53dae L |
812 | 0, /* Augmentation size */ |
813 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, | |
814 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
815 | }; | |
816 | ||
38b12349 L |
817 | /* Architecture-specific backend data for x86-64. */ |
818 | ||
819 | struct elf_x86_64_backend_data | |
820 | { | |
821 | /* Target system. */ | |
822 | enum | |
823 | { | |
824 | is_normal, | |
825 | is_nacl | |
826 | } os; | |
eed180f8 RM |
827 | }; |
828 | ||
f8222080 L |
829 | #define get_elf_x86_64_arch_data(bed) \ |
830 | ((const struct elf_x86_64_backend_data *) (bed)->arch_data) | |
831 | ||
eed180f8 | 832 | #define get_elf_x86_64_backend_data(abfd) \ |
f8222080 | 833 | get_elf_x86_64_arch_data (get_elf_backend_data (abfd)) |
eed180f8 | 834 | |
eed180f8 | 835 | /* These are the standard parameters. */ |
765e526c | 836 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt = |
eed180f8 | 837 | { |
38b12349 | 838 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ |
765e526c | 839 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
38b12349 L |
840 | elf_x86_64_lazy_plt_entry, /* plt_entry */ |
841 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
eed180f8 RM |
842 | 2, /* plt0_got1_offset */ |
843 | 8, /* plt0_got2_offset */ | |
844 | 12, /* plt0_got2_insn_end */ | |
845 | 2, /* plt_got_offset */ | |
846 | 7, /* plt_reloc_offset */ | |
847 | 12, /* plt_plt_offset */ | |
848 | 6, /* plt_got_insn_size */ | |
38b12349 | 849 | LAZY_PLT_ENTRY_SIZE, /* plt_plt_insn_end */ |
eed180f8 | 850 | 6, /* plt_lazy_offset */ |
765e526c L |
851 | NULL, /* pic_plt0_entry */ |
852 | NULL, /* pic_plt_entry */ | |
38b12349 L |
853 | elf_x86_64_eh_frame_lazy_plt, /* eh_frame_plt */ |
854 | sizeof (elf_x86_64_eh_frame_lazy_plt) /* eh_frame_plt_size */ | |
855 | }; | |
856 | ||
765e526c | 857 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_plt = |
38b12349 L |
858 | { |
859 | elf_x86_64_non_lazy_plt_entry, /* plt_entry */ | |
765e526c | 860 | NULL, /* pic_plt_entry */ |
38b12349 L |
861 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
862 | 2, /* plt_got_offset */ | |
863 | 6, /* plt_got_insn_size */ | |
864 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
865 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
eed180f8 RM |
866 | }; |
867 | ||
765e526c | 868 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_bnd_plt = |
0ff2b86e | 869 | { |
38b12349 | 870 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ |
765e526c | 871 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
38b12349 L |
872 | elf_x86_64_lazy_bnd_plt_entry, /* plt_entry */ |
873 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
0ff2b86e L |
874 | 2, /* plt0_got1_offset */ |
875 | 1+8, /* plt0_got2_offset */ | |
876 | 1+12, /* plt0_got2_insn_end */ | |
877 | 1+2, /* plt_got_offset */ | |
878 | 1, /* plt_reloc_offset */ | |
879 | 7, /* plt_plt_offset */ | |
880 | 1+6, /* plt_got_insn_size */ | |
881 | 11, /* plt_plt_insn_end */ | |
882 | 0, /* plt_lazy_offset */ | |
765e526c L |
883 | NULL, /* pic_plt0_entry */ |
884 | NULL, /* pic_plt_entry */ | |
38b12349 L |
885 | elf_x86_64_eh_frame_lazy_bnd_plt, /* eh_frame_plt */ |
886 | sizeof (elf_x86_64_eh_frame_lazy_bnd_plt) /* eh_frame_plt_size */ | |
887 | }; | |
888 | ||
765e526c | 889 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt = |
38b12349 L |
890 | { |
891 | elf_x86_64_non_lazy_bnd_plt_entry, /* plt_entry */ | |
765e526c | 892 | NULL, /* pic_plt_entry */ |
38b12349 L |
893 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
894 | 1+2, /* plt_got_offset */ | |
895 | 1+6, /* plt_got_insn_size */ | |
896 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
897 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
898 | }; | |
899 | ||
765e526c | 900 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt = |
ee2fdd6f L |
901 | { |
902 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ | |
765e526c | 903 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
ee2fdd6f L |
904 | elf_x86_64_lazy_ibt_plt_entry, /* plt_entry */ |
905 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
906 | 2, /* plt0_got1_offset */ | |
907 | 1+8, /* plt0_got2_offset */ | |
908 | 1+12, /* plt0_got2_insn_end */ | |
909 | 4+1+2, /* plt_got_offset */ | |
910 | 4+1, /* plt_reloc_offset */ | |
911 | 4+1+6, /* plt_plt_offset */ | |
912 | 4+1+6, /* plt_got_insn_size */ | |
913 | 4+1+5+5, /* plt_plt_insn_end */ | |
914 | 0, /* plt_lazy_offset */ | |
765e526c L |
915 | NULL, /* pic_plt0_entry */ |
916 | NULL, /* pic_plt_entry */ | |
ee2fdd6f L |
917 | elf_x86_64_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ |
918 | sizeof (elf_x86_64_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ | |
919 | }; | |
920 | ||
765e526c | 921 | static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt = |
ee2fdd6f L |
922 | { |
923 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ | |
765e526c | 924 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
ee2fdd6f L |
925 | elf_x32_lazy_ibt_plt_entry, /* plt_entry */ |
926 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
927 | 2, /* plt0_got1_offset */ | |
928 | 8, /* plt0_got2_offset */ | |
929 | 12, /* plt0_got2_insn_end */ | |
930 | 4+2, /* plt_got_offset */ | |
931 | 4+1, /* plt_reloc_offset */ | |
932 | 4+6, /* plt_plt_offset */ | |
933 | 4+6, /* plt_got_insn_size */ | |
934 | 4+5+5, /* plt_plt_insn_end */ | |
935 | 0, /* plt_lazy_offset */ | |
765e526c L |
936 | NULL, /* pic_plt0_entry */ |
937 | NULL, /* pic_plt_entry */ | |
ee2fdd6f L |
938 | elf_x32_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ |
939 | sizeof (elf_x32_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ | |
940 | }; | |
941 | ||
765e526c | 942 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt = |
ee2fdd6f L |
943 | { |
944 | elf_x86_64_non_lazy_ibt_plt_entry, /* plt_entry */ | |
765e526c | 945 | NULL, /* pic_plt_entry */ |
ee2fdd6f L |
946 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
947 | 4+1+2, /* plt_got_offset */ | |
948 | 4+1+6, /* plt_got_insn_size */ | |
949 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
950 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
951 | }; | |
952 | ||
765e526c | 953 | static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt = |
ee2fdd6f L |
954 | { |
955 | elf_x32_non_lazy_ibt_plt_entry, /* plt_entry */ | |
765e526c | 956 | NULL, /* pic_plt_entry */ |
ee2fdd6f L |
957 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
958 | 4+2, /* plt_got_offset */ | |
959 | 4+6, /* plt_got_insn_size */ | |
960 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
961 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
962 | }; | |
963 | ||
38b12349 L |
964 | static const struct elf_x86_64_backend_data elf_x86_64_arch_bed = |
965 | { | |
966 | is_normal /* os */ | |
0ff2b86e L |
967 | }; |
968 | ||
eed180f8 RM |
969 | #define elf_backend_arch_data &elf_x86_64_arch_bed |
970 | ||
0afcef53 | 971 | /* Values in tls_type of x86 ELF linker hash entry. */ |
bffbf940 | 972 | #define GOT_TLS_IE 3 |
67a4f2b7 AO |
973 | #define GOT_TLS_GDESC 4 |
974 | #define GOT_TLS_GD_BOTH_P(type) \ | |
975 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
976 | #define GOT_TLS_GD_P(type) \ | |
977 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
978 | #define GOT_TLS_GDESC_P(type) \ | |
979 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
980 | #define GOT_TLS_GD_ANY_P(type) \ | |
981 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
bffbf940 | 982 | |
0ffa91dd NC |
983 | #define is_x86_64_elf(bfd) \ |
984 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
985 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 986 | && elf_object_id (bfd) == X86_64_ELF_DATA) |
0ffa91dd NC |
987 | |
988 | static bfd_boolean | |
351f65ca | 989 | elf_x86_64_mkobject (bfd *abfd) |
0ffa91dd | 990 | { |
0afcef53 | 991 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_obj_tdata), |
4dfe6ac6 | 992 | X86_64_ELF_DATA); |
0ffa91dd NC |
993 | } |
994 | ||
0afcef53 L |
995 | #define elf_x86_64_compute_jump_table_size(htab) \ |
996 | ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE) | |
68faa637 | 997 | |
b34976b6 | 998 | static bfd_boolean |
27482721 | 999 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 1000 | { |
8d88c4ca NC |
1001 | /* Set the right machine number for an x86-64 elf64 file. */ |
1002 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 1003 | return TRUE; |
8d88c4ca NC |
1004 | } |
1005 | ||
8059fb19 RM |
1006 | static bfd_boolean |
1007 | elf32_x86_64_elf_object_p (bfd *abfd) | |
1008 | { | |
1009 | /* Set the right machine number for an x86-64 elf32 file. */ | |
1010 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
1011 | return TRUE; | |
1012 | } | |
1013 | ||
142411ca L |
1014 | /* Return TRUE if the TLS access code sequence support transition |
1015 | from R_TYPE. */ | |
1016 | ||
1017 | static bfd_boolean | |
351f65ca L |
1018 | elf_x86_64_check_tls_transition (bfd *abfd, |
1019 | struct bfd_link_info *info, | |
1020 | asection *sec, | |
1021 | bfd_byte *contents, | |
1022 | Elf_Internal_Shdr *symtab_hdr, | |
1023 | struct elf_link_hash_entry **sym_hashes, | |
1024 | unsigned int r_type, | |
1025 | const Elf_Internal_Rela *rel, | |
1026 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1027 | { |
142411ca L |
1028 | unsigned int val; |
1029 | unsigned long r_symndx; | |
5c98a14e | 1030 | bfd_boolean largepic = FALSE; |
142411ca L |
1031 | struct elf_link_hash_entry *h; |
1032 | bfd_vma offset; | |
0afcef53 | 1033 | struct elf_x86_link_hash_table *htab; |
e2cbcd91 | 1034 | bfd_byte *call; |
1d4af308 | 1035 | bfd_boolean indirect_call; |
142411ca | 1036 | |
0afcef53 | 1037 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
142411ca | 1038 | offset = rel->r_offset; |
bffbf940 | 1039 | switch (r_type) |
142411ca L |
1040 | { |
1041 | case R_X86_64_TLSGD: | |
1042 | case R_X86_64_TLSLD: | |
1043 | if ((rel + 1) >= relend) | |
1044 | return FALSE; | |
1045 | ||
1046 | if (r_type == R_X86_64_TLSGD) | |
1047 | { | |
52bc799a | 1048 | /* Check transition from GD access model. For 64bit, only |
142411ca | 1049 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
e2cbcd91 L |
1050 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1051 | or | |
1052 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
1053 | .byte 0x66; rex64 | |
1054 | call *__tls_get_addr@GOTPCREL(%rip) | |
1055 | which may be converted to | |
1056 | addr32 call __tls_get_addr | |
52bc799a L |
1057 | can transit to different access model. For 32bit, only |
1058 | leaq foo@tlsgd(%rip), %rdi | |
e2cbcd91 L |
1059 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1060 | or | |
1061 | leaq foo@tlsgd(%rip), %rdi | |
1062 | .byte 0x66; rex64 | |
1063 | call *__tls_get_addr@GOTPCREL(%rip) | |
1064 | which may be converted to | |
1065 | addr32 call __tls_get_addr | |
1066 | can transit to different access model. For largepic, | |
5c98a14e | 1067 | we also support: |
e2cbcd91 L |
1068 | leaq foo@tlsgd(%rip), %rdi |
1069 | movabsq $__tls_get_addr@pltoff, %rax | |
1070 | addq $r15, %rax | |
1071 | call *%rax | |
1072 | or | |
5c98a14e JJ |
1073 | leaq foo@tlsgd(%rip), %rdi |
1074 | movabsq $__tls_get_addr@pltoff, %rax | |
1075 | addq $rbx, %rax | |
e2cbcd91 | 1076 | call *%rax */ |
142411ca | 1077 | |
fa289a5f AM |
1078 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; |
1079 | ||
5c98a14e | 1080 | if ((offset + 12) > sec->size) |
142411ca | 1081 | return FALSE; |
52bc799a | 1082 | |
e2cbcd91 L |
1083 | call = contents + offset + 4; |
1084 | if (call[0] != 0x66 | |
1085 | || !((call[1] == 0x48 | |
1086 | && call[2] == 0xff | |
1087 | && call[3] == 0x15) | |
1088 | || (call[1] == 0x48 | |
1089 | && call[2] == 0x67 | |
1090 | && call[3] == 0xe8) | |
1091 | || (call[1] == 0x66 | |
1092 | && call[2] == 0x48 | |
1093 | && call[3] == 0xe8))) | |
5c98a14e JJ |
1094 | { |
1095 | if (!ABI_64_P (abfd) | |
1096 | || (offset + 19) > sec->size | |
1097 | || offset < 3 | |
e2cbcd91 L |
1098 | || memcmp (call - 7, leaq + 1, 3) != 0 |
1099 | || memcmp (call, "\x48\xb8", 2) != 0 | |
1100 | || call[11] != 0x01 | |
1101 | || call[13] != 0xff | |
1102 | || call[14] != 0xd0 | |
1103 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1104 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1105 | return FALSE; |
1106 | largepic = TRUE; | |
1107 | } | |
1108 | else if (ABI_64_P (abfd)) | |
52bc799a | 1109 | { |
52bc799a | 1110 | if (offset < 4 |
fa289a5f | 1111 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1112 | return FALSE; |
1113 | } | |
1114 | else | |
1115 | { | |
52bc799a | 1116 | if (offset < 3 |
fa289a5f | 1117 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1118 | return FALSE; |
1119 | } | |
e2cbcd91 | 1120 | indirect_call = call[2] == 0xff; |
142411ca L |
1121 | } |
1122 | else | |
1123 | { | |
1124 | /* Check transition from LD access model. Only | |
1125 | leaq foo@tlsld(%rip), %rdi; | |
e2cbcd91 L |
1126 | call __tls_get_addr@PLT |
1127 | or | |
1128 | leaq foo@tlsld(%rip), %rdi; | |
1129 | call *__tls_get_addr@GOTPCREL(%rip) | |
1130 | which may be converted to | |
1131 | addr32 call __tls_get_addr | |
5c98a14e JJ |
1132 | can transit to different access model. For largepic |
1133 | we also support: | |
e2cbcd91 L |
1134 | leaq foo@tlsld(%rip), %rdi |
1135 | movabsq $__tls_get_addr@pltoff, %rax | |
1136 | addq $r15, %rax | |
1137 | call *%rax | |
1138 | or | |
5c98a14e JJ |
1139 | leaq foo@tlsld(%rip), %rdi |
1140 | movabsq $__tls_get_addr@pltoff, %rax | |
1141 | addq $rbx, %rax | |
e2cbcd91 | 1142 | call *%rax */ |
142411ca | 1143 | |
fa289a5f | 1144 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1145 | |
1146 | if (offset < 3 || (offset + 9) > sec->size) | |
1147 | return FALSE; | |
1148 | ||
5c98a14e | 1149 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
142411ca | 1150 | return FALSE; |
5c98a14e | 1151 | |
e2cbcd91 L |
1152 | call = contents + offset + 4; |
1153 | if (!(call[0] == 0xe8 | |
1154 | || (call[0] == 0xff && call[1] == 0x15) | |
1155 | || (call[0] == 0x67 && call[1] == 0xe8))) | |
5c98a14e JJ |
1156 | { |
1157 | if (!ABI_64_P (abfd) | |
1158 | || (offset + 19) > sec->size | |
e2cbcd91 L |
1159 | || memcmp (call, "\x48\xb8", 2) != 0 |
1160 | || call[11] != 0x01 | |
1161 | || call[13] != 0xff | |
1162 | || call[14] != 0xd0 | |
1163 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1164 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1165 | return FALSE; |
1166 | largepic = TRUE; | |
1167 | } | |
e2cbcd91 | 1168 | indirect_call = call[0] == 0xff; |
142411ca L |
1169 | } |
1170 | ||
351f65ca | 1171 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1172 | if (r_symndx < symtab_hdr->sh_info) |
1173 | return FALSE; | |
1174 | ||
1175 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1d4af308 | 1176 | if (h == NULL |
0afcef53 | 1177 | || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr) |
e2cbcd91 L |
1178 | return FALSE; |
1179 | else if (largepic) | |
1180 | return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64; | |
1181 | else if (indirect_call) | |
1182 | return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_GOTPCRELX; | |
1183 | else | |
1184 | return (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32 | |
1185 | || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
142411ca L |
1186 | |
1187 | case R_X86_64_GOTTPOFF: | |
1188 | /* Check transition from IE access model: | |
4a4c5f25 L |
1189 | mov foo@gottpoff(%rip), %reg |
1190 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1191 | */ |
1192 | ||
4a4c5f25 L |
1193 | /* Check REX prefix first. */ |
1194 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1195 | { | |
1196 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1197 | if (val != 0x48 && val != 0x4c) | |
1198 | { | |
1199 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1200 | if (ABI_64_P (abfd)) | |
1201 | return FALSE; | |
1202 | } | |
1203 | } | |
1204 | else | |
1205 | { | |
1206 | /* X32 may not have any REX prefix. */ | |
1207 | if (ABI_64_P (abfd)) | |
1208 | return FALSE; | |
1209 | if (offset < 2 || (offset + 3) > sec->size) | |
1210 | return FALSE; | |
1211 | } | |
142411ca L |
1212 | |
1213 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1214 | if (val != 0x8b && val != 0x03) | |
1215 | return FALSE; | |
1216 | ||
1217 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1218 | return (val & 0xc7) == 5; | |
1219 | ||
1220 | case R_X86_64_GOTPC32_TLSDESC: | |
1221 | /* Check transition from GDesc access model: | |
1222 | leaq x@tlsdesc(%rip), %rax | |
1223 | ||
1224 | Make sure it's a leaq adding rip to a 32-bit offset | |
1225 | into any register, although it's probably almost always | |
1226 | going to be rax. */ | |
1227 | ||
1228 | if (offset < 3 || (offset + 4) > sec->size) | |
1229 | return FALSE; | |
1230 | ||
1231 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1232 | if ((val & 0xfb) != 0x48) | |
1233 | return FALSE; | |
1234 | ||
1235 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1236 | return FALSE; | |
1237 | ||
1238 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1239 | return (val & 0xc7) == 0x05; | |
1240 | ||
1241 | case R_X86_64_TLSDESC_CALL: | |
1242 | /* Check transition from GDesc access model: | |
1243 | call *x@tlsdesc(%rax) | |
1244 | */ | |
1245 | if (offset + 2 <= sec->size) | |
1246 | { | |
1247 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
e2cbcd91 L |
1248 | call = contents + offset; |
1249 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1250 | } |
1251 | ||
1252 | return FALSE; | |
1253 | ||
1254 | default: | |
1255 | abort (); | |
1256 | } | |
1257 | } | |
1258 | ||
1259 | /* Return TRUE if the TLS access transition is OK or no transition | |
1260 | will be performed. Update R_TYPE if there is a transition. */ | |
1261 | ||
1262 | static bfd_boolean | |
351f65ca L |
1263 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1264 | asection *sec, bfd_byte *contents, | |
1265 | Elf_Internal_Shdr *symtab_hdr, | |
1266 | struct elf_link_hash_entry **sym_hashes, | |
1267 | unsigned int *r_type, int tls_type, | |
1268 | const Elf_Internal_Rela *rel, | |
1269 | const Elf_Internal_Rela *relend, | |
1270 | struct elf_link_hash_entry *h, | |
bedfd056 L |
1271 | unsigned long r_symndx, |
1272 | bfd_boolean from_relocate_section) | |
142411ca L |
1273 | { |
1274 | unsigned int from_type = *r_type; | |
1275 | unsigned int to_type = from_type; | |
1276 | bfd_boolean check = TRUE; | |
1277 | ||
bb1cb422 L |
1278 | /* Skip TLS transition for functions. */ |
1279 | if (h != NULL | |
1280 | && (h->type == STT_FUNC | |
1281 | || h->type == STT_GNU_IFUNC)) | |
1282 | return TRUE; | |
1283 | ||
142411ca | 1284 | switch (from_type) |
bffbf940 JJ |
1285 | { |
1286 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1287 | case R_X86_64_GOTPC32_TLSDESC: |
1288 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1289 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1290 | if (bfd_link_executable (info)) |
142411ca L |
1291 | { |
1292 | if (h == NULL) | |
1293 | to_type = R_X86_64_TPOFF32; | |
1294 | else | |
1295 | to_type = R_X86_64_GOTTPOFF; | |
1296 | } | |
1297 | ||
bedfd056 L |
1298 | /* When we are called from elf_x86_64_relocate_section, there may |
1299 | be additional transitions based on TLS_TYPE. */ | |
1300 | if (from_relocate_section) | |
142411ca L |
1301 | { |
1302 | unsigned int new_to_type = to_type; | |
1303 | ||
0e1862bb | 1304 | if (bfd_link_executable (info) |
142411ca L |
1305 | && h != NULL |
1306 | && h->dynindx == -1 | |
1307 | && tls_type == GOT_TLS_IE) | |
1308 | new_to_type = R_X86_64_TPOFF32; | |
1309 | ||
1310 | if (to_type == R_X86_64_TLSGD | |
1311 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1312 | || to_type == R_X86_64_TLSDESC_CALL) | |
1313 | { | |
1314 | if (tls_type == GOT_TLS_IE) | |
1315 | new_to_type = R_X86_64_GOTTPOFF; | |
1316 | } | |
1317 | ||
1318 | /* We checked the transition before when we were called from | |
351f65ca | 1319 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1320 | transition which hasn't been checked before. */ |
1321 | check = new_to_type != to_type && from_type == to_type; | |
1322 | to_type = new_to_type; | |
1323 | } | |
1324 | ||
1325 | break; | |
1326 | ||
bffbf940 | 1327 | case R_X86_64_TLSLD: |
0e1862bb | 1328 | if (bfd_link_executable (info)) |
142411ca L |
1329 | to_type = R_X86_64_TPOFF32; |
1330 | break; | |
1331 | ||
1332 | default: | |
1333 | return TRUE; | |
bffbf940 JJ |
1334 | } |
1335 | ||
142411ca L |
1336 | /* Return TRUE if there is no transition. */ |
1337 | if (from_type == to_type) | |
1338 | return TRUE; | |
1339 | ||
1340 | /* Check if the transition can be performed. */ | |
1341 | if (check | |
351f65ca L |
1342 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1343 | symtab_hdr, sym_hashes, | |
1344 | from_type, rel, relend)) | |
142411ca | 1345 | { |
2f629d23 | 1346 | reloc_howto_type *from, *to; |
4c544807 | 1347 | const char *name; |
142411ca | 1348 | |
351f65ca L |
1349 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1350 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1351 | |
4c544807 L |
1352 | if (h) |
1353 | name = h->root.root.string; | |
1354 | else | |
1355 | { | |
0afcef53 | 1356 | struct elf_x86_link_hash_table *htab; |
4dfe6ac6 | 1357 | |
0afcef53 | 1358 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
1359 | if (htab == NULL) |
1360 | name = "*unknown*"; | |
1361 | else | |
1362 | { | |
1363 | Elf_Internal_Sym *isym; | |
1364 | ||
1365 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1366 | abfd, r_symndx); | |
1367 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1368 | } | |
4c544807 L |
1369 | } |
1370 | ||
4eca0228 | 1371 | _bfd_error_handler |
695344c0 | 1372 | /* xgettext:c-format */ |
d42c267e | 1373 | (_("%B: TLS transition from %s to %s against `%s' at %#Lx " |
142411ca | 1374 | "in section `%A' failed"), |
d42c267e | 1375 | abfd, from->name, to->name, name, rel->r_offset, sec); |
142411ca L |
1376 | bfd_set_error (bfd_error_bad_value); |
1377 | return FALSE; | |
1378 | } | |
1379 | ||
1380 | *r_type = to_type; | |
1381 | return TRUE; | |
bffbf940 JJ |
1382 | } |
1383 | ||
c1d11331 L |
1384 | /* Rename some of the generic section flags to better document how they |
1385 | are used here. */ | |
338c190a L |
1386 | #define need_convert_load sec_flg0 |
1387 | #define check_relocs_failed sec_flg1 | |
1388 | ||
1389 | static bfd_boolean | |
aab921ad L |
1390 | elf_x86_64_need_pic (struct bfd_link_info *info, |
1391 | bfd *input_bfd, asection *sec, | |
338c190a L |
1392 | struct elf_link_hash_entry *h, |
1393 | Elf_Internal_Shdr *symtab_hdr, | |
1394 | Elf_Internal_Sym *isym, | |
1395 | reloc_howto_type *howto) | |
1396 | { | |
1397 | const char *v = ""; | |
1398 | const char *und = ""; | |
1399 | const char *pic = ""; | |
aab921ad | 1400 | const char *object; |
338c190a L |
1401 | |
1402 | const char *name; | |
1403 | if (h) | |
1404 | { | |
1405 | name = h->root.root.string; | |
1406 | switch (ELF_ST_VISIBILITY (h->other)) | |
1407 | { | |
1408 | case STV_HIDDEN: | |
1409 | v = _("hidden symbol "); | |
1410 | break; | |
1411 | case STV_INTERNAL: | |
1412 | v = _("internal symbol "); | |
1413 | break; | |
1414 | case STV_PROTECTED: | |
1415 | v = _("protected symbol "); | |
1416 | break; | |
1417 | default: | |
0afcef53 | 1418 | if (((struct elf_x86_link_hash_entry *) h)->def_protected) |
a5b4ee94 L |
1419 | v = _("protected symbol "); |
1420 | else | |
1421 | v = _("symbol "); | |
338c190a L |
1422 | pic = _("; recompile with -fPIC"); |
1423 | break; | |
1424 | } | |
1425 | ||
1426 | if (!h->def_regular && !h->def_dynamic) | |
1427 | und = _("undefined "); | |
1428 | } | |
1429 | else | |
1430 | { | |
1431 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL); | |
1432 | pic = _("; recompile with -fPIC"); | |
1433 | } | |
1434 | ||
aab921ad L |
1435 | if (bfd_link_dll (info)) |
1436 | object = _("a shared object"); | |
1437 | else if (bfd_link_pie (info)) | |
1438 | object = _("a PIE object"); | |
1439 | else | |
1440 | object = _("a PDE object"); | |
1441 | ||
695344c0 | 1442 | /* xgettext:c-format */ |
4eca0228 | 1443 | _bfd_error_handler (_("%B: relocation %s against %s%s`%s' can " |
aab921ad L |
1444 | "not be used when making %s%s"), |
1445 | input_bfd, howto->name, und, v, name, | |
1446 | object, pic); | |
338c190a L |
1447 | bfd_set_error (bfd_error_bad_value); |
1448 | sec->check_relocs_failed = 1; | |
1449 | return FALSE; | |
1450 | } | |
c1d11331 | 1451 | |
c175a657 L |
1452 | /* With the local symbol, foo, we convert |
1453 | mov foo@GOTPCREL(%rip), %reg | |
1454 | to | |
1455 | lea foo(%rip), %reg | |
1456 | and convert | |
1457 | call/jmp *foo@GOTPCREL(%rip) | |
1458 | to | |
1459 | nop call foo/jmp foo nop | |
1460 | When PIC is false, convert | |
1461 | test %reg, foo@GOTPCREL(%rip) | |
1462 | to | |
1463 | test $foo, %reg | |
1464 | and convert | |
1465 | binop foo@GOTPCREL(%rip), %reg | |
1466 | to | |
1467 | binop $foo, %reg | |
1468 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1469 | instructions. */ | |
1470 | ||
1471 | static bfd_boolean | |
1472 | elf_x86_64_convert_load_reloc (bfd *abfd, asection *sec, | |
1473 | bfd_byte *contents, | |
1474 | Elf_Internal_Rela *irel, | |
1475 | struct elf_link_hash_entry *h, | |
1476 | bfd_boolean *converted, | |
1477 | struct bfd_link_info *link_info) | |
1478 | { | |
0afcef53 | 1479 | struct elf_x86_link_hash_table *htab; |
c175a657 L |
1480 | bfd_boolean is_pic; |
1481 | bfd_boolean require_reloc_pc32; | |
1482 | bfd_boolean relocx; | |
1483 | bfd_boolean to_reloc_pc32; | |
1484 | asection *tsec; | |
1485 | char symtype; | |
1486 | bfd_signed_vma raddend; | |
1487 | unsigned int opcode; | |
1488 | unsigned int modrm; | |
1489 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
1490 | unsigned int r_symndx; | |
1491 | bfd_vma toff; | |
1492 | bfd_vma roff = irel->r_offset; | |
1493 | ||
1494 | if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2)) | |
1495 | return TRUE; | |
1496 | ||
1497 | raddend = irel->r_addend; | |
1498 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
1499 | if (raddend != -4) | |
1500 | return TRUE; | |
1501 | ||
0afcef53 | 1502 | htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA); |
c175a657 L |
1503 | is_pic = bfd_link_pic (link_info); |
1504 | ||
1505 | relocx = (r_type == R_X86_64_GOTPCRELX | |
1506 | || r_type == R_X86_64_REX_GOTPCRELX); | |
1507 | ||
1508 | /* TRUE if we can convert only to R_X86_64_PC32. Enable it for | |
1509 | --no-relax. */ | |
1510 | require_reloc_pc32 | |
1511 | = link_info->disable_target_specific_optimizations > 1; | |
1512 | ||
1513 | r_symndx = htab->r_sym (irel->r_info); | |
1514 | ||
1515 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1516 | ||
1517 | /* Convert mov to lea since it has been done for a while. */ | |
1518 | if (opcode != 0x8b) | |
1519 | { | |
1520 | /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX | |
1521 | for call, jmp or one of adc, add, and, cmp, or, sbb, sub, | |
1522 | test, xor instructions. */ | |
1523 | if (!relocx) | |
1524 | return TRUE; | |
1525 | } | |
1526 | ||
1527 | /* We convert only to R_X86_64_PC32: | |
1528 | 1. Branch. | |
1529 | 2. R_X86_64_GOTPCREL since we can't modify REX byte. | |
1530 | 3. require_reloc_pc32 is true. | |
1531 | 4. PIC. | |
1532 | */ | |
1533 | to_reloc_pc32 = (opcode == 0xff | |
1534 | || !relocx | |
1535 | || require_reloc_pc32 | |
1536 | || is_pic); | |
1537 | ||
1538 | /* Get the symbol referred to by the reloc. */ | |
1539 | if (h == NULL) | |
1540 | { | |
1541 | Elf_Internal_Sym *isym | |
1542 | = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx); | |
1543 | ||
1544 | /* Skip relocation against undefined symbols. */ | |
1545 | if (isym->st_shndx == SHN_UNDEF) | |
1546 | return TRUE; | |
1547 | ||
1548 | symtype = ELF_ST_TYPE (isym->st_info); | |
1549 | ||
1550 | if (isym->st_shndx == SHN_ABS) | |
1551 | tsec = bfd_abs_section_ptr; | |
1552 | else if (isym->st_shndx == SHN_COMMON) | |
1553 | tsec = bfd_com_section_ptr; | |
1554 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
1555 | tsec = &_bfd_elf_large_com_section; | |
1556 | else | |
1557 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1558 | ||
1559 | toff = isym->st_value; | |
1560 | } | |
1561 | else | |
1562 | { | |
1563 | /* Undefined weak symbol is only bound locally in executable | |
1564 | and its reference is resolved as 0 without relocation | |
1565 | overflow. We can only perform this optimization for | |
1566 | GOTPCRELX relocations since we need to modify REX byte. | |
1567 | It is OK convert mov with R_X86_64_GOTPCREL to | |
1568 | R_X86_64_PC32. */ | |
1569 | if ((relocx || opcode == 0x8b) | |
1570 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, | |
0afcef53 | 1571 | X86_64_ELF_DATA, |
c175a657 | 1572 | TRUE, |
0afcef53 | 1573 | elf_x86_hash_entry (h))) |
c175a657 L |
1574 | { |
1575 | if (opcode == 0xff) | |
1576 | { | |
1577 | /* Skip for branch instructions since R_X86_64_PC32 | |
1578 | may overflow. */ | |
1579 | if (require_reloc_pc32) | |
1580 | return TRUE; | |
1581 | } | |
1582 | else if (relocx) | |
1583 | { | |
1584 | /* For non-branch instructions, we can convert to | |
1585 | R_X86_64_32/R_X86_64_32S since we know if there | |
1586 | is a REX byte. */ | |
1587 | to_reloc_pc32 = FALSE; | |
1588 | } | |
1589 | ||
1590 | /* Since we don't know the current PC when PIC is true, | |
1591 | we can't convert to R_X86_64_PC32. */ | |
1592 | if (to_reloc_pc32 && is_pic) | |
1593 | return TRUE; | |
1594 | ||
1595 | goto convert; | |
1596 | } | |
1597 | /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since | |
1598 | ld.so may use its link-time address. */ | |
cbd0eecf L |
1599 | else if (h->start_stop |
1600 | || ((h->def_regular | |
1601 | || h->root.type == bfd_link_hash_defined | |
1602 | || h->root.type == bfd_link_hash_defweak) | |
1603 | && h != htab->elf.hdynamic | |
1604 | && SYMBOL_REFERENCES_LOCAL (link_info, h))) | |
c175a657 L |
1605 | { |
1606 | /* bfd_link_hash_new or bfd_link_hash_undefined is | |
1607 | set by an assignment in a linker script in | |
cbd0eecf L |
1608 | bfd_elf_record_link_assignment. start_stop is set |
1609 | on __start_SECNAME/__stop_SECNAME which mark section | |
1610 | SECNAME. */ | |
1611 | if (h->start_stop | |
1612 | || (h->def_regular | |
1613 | && (h->root.type == bfd_link_hash_new | |
1614 | || h->root.type == bfd_link_hash_undefined | |
1615 | || ((h->root.type == bfd_link_hash_defined | |
1616 | || h->root.type == bfd_link_hash_defweak) | |
1617 | && h->root.u.def.section == bfd_und_section_ptr)))) | |
c175a657 L |
1618 | { |
1619 | /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */ | |
1620 | if (require_reloc_pc32) | |
1621 | return TRUE; | |
1622 | goto convert; | |
1623 | } | |
1624 | tsec = h->root.u.def.section; | |
1625 | toff = h->root.u.def.value; | |
1626 | symtype = h->type; | |
1627 | } | |
1628 | else | |
1629 | return TRUE; | |
1630 | } | |
1631 | ||
2168b268 L |
1632 | /* Don't convert GOTPCREL relocation against large section. */ |
1633 | if (elf_section_data (tsec) != NULL | |
1634 | && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0) | |
1635 | return TRUE; | |
1636 | ||
c175a657 L |
1637 | /* We can only estimate relocation overflow for R_X86_64_PC32. */ |
1638 | if (!to_reloc_pc32) | |
1639 | goto convert; | |
1640 | ||
1641 | if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE) | |
1642 | { | |
1643 | /* At this stage in linking, no SEC_MERGE symbol has been | |
1644 | adjusted, so all references to such symbols need to be | |
1645 | passed through _bfd_merged_section_offset. (Later, in | |
1646 | relocate_section, all SEC_MERGE symbols *except* for | |
1647 | section symbols have been adjusted.) | |
1648 | ||
1649 | gas may reduce relocations against symbols in SEC_MERGE | |
1650 | sections to a relocation against the section symbol when | |
1651 | the original addend was zero. When the reloc is against | |
1652 | a section symbol we should include the addend in the | |
1653 | offset passed to _bfd_merged_section_offset, since the | |
1654 | location of interest is the original symbol. On the | |
1655 | other hand, an access to "sym+addend" where "sym" is not | |
1656 | a section symbol should not include the addend; Such an | |
1657 | access is presumed to be an offset from "sym"; The | |
1658 | location of interest is just "sym". */ | |
1659 | if (symtype == STT_SECTION) | |
1660 | toff += raddend; | |
1661 | ||
1662 | toff = _bfd_merged_section_offset (abfd, &tsec, | |
1663 | elf_section_data (tsec)->sec_info, | |
1664 | toff); | |
1665 | ||
1666 | if (symtype != STT_SECTION) | |
1667 | toff += raddend; | |
1668 | } | |
1669 | else | |
1670 | toff += raddend; | |
1671 | ||
1672 | /* Don't convert if R_X86_64_PC32 relocation overflows. */ | |
1673 | if (tsec->output_section == sec->output_section) | |
1674 | { | |
1675 | if ((toff - roff + 0x80000000) > 0xffffffff) | |
1676 | return TRUE; | |
1677 | } | |
1678 | else | |
1679 | { | |
1680 | bfd_signed_vma distance; | |
1681 | ||
1682 | /* At this point, we don't know the load addresses of TSEC | |
1683 | section nor SEC section. We estimate the distrance between | |
1684 | SEC and TSEC. We store the estimated distances in the | |
1685 | compressed_size field of the output section, which is only | |
1686 | used to decompress the compressed input section. */ | |
1687 | if (sec->output_section->compressed_size == 0) | |
1688 | { | |
1689 | asection *asect; | |
1690 | bfd_size_type size = 0; | |
1691 | for (asect = link_info->output_bfd->sections; | |
1692 | asect != NULL; | |
1693 | asect = asect->next) | |
1694 | /* Skip debug sections since compressed_size is used to | |
1695 | compress debug sections. */ | |
1696 | if ((asect->flags & SEC_DEBUGGING) == 0) | |
1697 | { | |
1698 | asection *i; | |
1699 | for (i = asect->map_head.s; | |
1700 | i != NULL; | |
1701 | i = i->map_head.s) | |
1702 | { | |
1703 | size = align_power (size, i->alignment_power); | |
1704 | size += i->size; | |
1705 | } | |
1706 | asect->compressed_size = size; | |
1707 | } | |
1708 | } | |
1709 | ||
1710 | /* Don't convert GOTPCREL relocations if TSEC isn't placed | |
1711 | after SEC. */ | |
1712 | distance = (tsec->output_section->compressed_size | |
1713 | - sec->output_section->compressed_size); | |
1714 | if (distance < 0) | |
1715 | return TRUE; | |
1716 | ||
1717 | /* Take PT_GNU_RELRO segment into account by adding | |
1718 | maxpagesize. */ | |
1719 | if ((toff + distance + get_elf_backend_data (abfd)->maxpagesize | |
1720 | - roff + 0x80000000) > 0xffffffff) | |
1721 | return TRUE; | |
1722 | } | |
1723 | ||
1724 | convert: | |
1725 | if (opcode == 0xff) | |
1726 | { | |
1727 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
1728 | unsigned int nop; | |
1729 | unsigned int disp; | |
1730 | bfd_vma nop_offset; | |
1731 | ||
1732 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
1733 | R_X86_64_PC32. */ | |
1734 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1735 | if (modrm == 0x25) | |
1736 | { | |
1737 | /* Convert to "jmp foo nop". */ | |
1738 | modrm = 0xe9; | |
1739 | nop = NOP_OPCODE; | |
1740 | nop_offset = irel->r_offset + 3; | |
1741 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1742 | irel->r_offset -= 1; | |
1743 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1744 | } | |
1745 | else | |
1746 | { | |
0afcef53 L |
1747 | struct elf_x86_link_hash_entry *eh |
1748 | = (struct elf_x86_link_hash_entry *) h; | |
e2cbcd91 | 1749 | |
c175a657 L |
1750 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
1751 | is a nop prefix. */ | |
1752 | modrm = 0xe8; | |
e2cbcd91 L |
1753 | /* To support TLS optimization, always use addr32 prefix for |
1754 | "call *__tls_get_addr@GOTPCREL(%rip)". */ | |
1d4af308 | 1755 | if (eh && eh->tls_get_addr) |
c175a657 | 1756 | { |
e2cbcd91 L |
1757 | nop = 0x67; |
1758 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1759 | } |
1760 | else | |
e2cbcd91 L |
1761 | { |
1762 | nop = link_info->call_nop_byte; | |
1763 | if (link_info->call_nop_as_suffix) | |
1764 | { | |
1765 | nop_offset = irel->r_offset + 3; | |
1766 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1767 | irel->r_offset -= 1; | |
1768 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1769 | } | |
1770 | else | |
1771 | nop_offset = irel->r_offset - 2; | |
1772 | } | |
c175a657 L |
1773 | } |
1774 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1775 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1776 | r_type = R_X86_64_PC32; | |
1777 | } | |
1778 | else | |
1779 | { | |
1780 | unsigned int rex; | |
1781 | unsigned int rex_mask = REX_R; | |
1782 | ||
1783 | if (r_type == R_X86_64_REX_GOTPCRELX) | |
1784 | rex = bfd_get_8 (abfd, contents + roff - 3); | |
1785 | else | |
1786 | rex = 0; | |
1787 | ||
1788 | if (opcode == 0x8b) | |
1789 | { | |
1790 | if (to_reloc_pc32) | |
1791 | { | |
1792 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1793 | "lea foo(%rip), %reg". */ | |
1794 | opcode = 0x8d; | |
1795 | r_type = R_X86_64_PC32; | |
1796 | } | |
1797 | else | |
1798 | { | |
1799 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1800 | "mov $foo, %reg". */ | |
1801 | opcode = 0xc7; | |
1802 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1803 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1804 | if ((rex & REX_W) != 0 | |
1805 | && ABI_64_P (link_info->output_bfd)) | |
1806 | { | |
1807 | /* Keep the REX_W bit in REX byte for LP64. */ | |
1808 | r_type = R_X86_64_32S; | |
1809 | goto rewrite_modrm_rex; | |
1810 | } | |
1811 | else | |
1812 | { | |
1813 | /* If the REX_W bit in REX byte isn't needed, | |
1814 | use R_X86_64_32 and clear the W bit to avoid | |
1815 | sign-extend imm32 to imm64. */ | |
1816 | r_type = R_X86_64_32; | |
1817 | /* Clear the W bit in REX byte. */ | |
1818 | rex_mask |= REX_W; | |
1819 | goto rewrite_modrm_rex; | |
1820 | } | |
1821 | } | |
1822 | } | |
1823 | else | |
1824 | { | |
1825 | /* R_X86_64_PC32 isn't supported. */ | |
1826 | if (to_reloc_pc32) | |
1827 | return TRUE; | |
1828 | ||
1829 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1830 | if (opcode == 0x85) | |
1831 | { | |
1832 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
1833 | "test $foo, %reg". */ | |
1834 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1835 | opcode = 0xf7; | |
1836 | } | |
1837 | else | |
1838 | { | |
1839 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
1840 | "binop $foo, %reg". */ | |
1841 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
1842 | opcode = 0x81; | |
1843 | } | |
1844 | ||
1845 | /* Use R_X86_64_32 with 32-bit operand to avoid relocation | |
1846 | overflow when sign-extending imm32 to imm64. */ | |
1847 | r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32; | |
1848 | ||
1849 | rewrite_modrm_rex: | |
1850 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1851 | ||
1852 | if (rex) | |
1853 | { | |
1854 | /* Move the R bit to the B bit in REX byte. */ | |
1855 | rex = (rex & ~rex_mask) | (rex & REX_R) >> 2; | |
1856 | bfd_put_8 (abfd, rex, contents + roff - 3); | |
1857 | } | |
1858 | ||
1859 | /* No addend for R_X86_64_32/R_X86_64_32S relocations. */ | |
1860 | irel->r_addend = 0; | |
1861 | } | |
1862 | ||
1863 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1864 | } | |
1865 | ||
1866 | irel->r_info = htab->r_info (r_symndx, r_type); | |
1867 | ||
1868 | *converted = TRUE; | |
1869 | ||
1870 | return TRUE; | |
1871 | } | |
1872 | ||
70256ad8 | 1873 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1874 | calculate needed space in the global offset table, procedure |
1875 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1876 | |
b34976b6 | 1877 | static bfd_boolean |
351f65ca L |
1878 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1879 | asection *sec, | |
1880 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1881 | { |
0afcef53 | 1882 | struct elf_x86_link_hash_table *htab; |
70256ad8 AJ |
1883 | Elf_Internal_Shdr *symtab_hdr; |
1884 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1885 | const Elf_Internal_Rela *rel; |
1886 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 1887 | asection *sreloc; |
bedfd056 | 1888 | bfd_byte *contents; |
70256ad8 | 1889 | |
0e1862bb | 1890 | if (bfd_link_relocatable (info)) |
b34976b6 | 1891 | return TRUE; |
70256ad8 | 1892 | |
081b1afe L |
1893 | /* Don't do anything special with non-loaded, non-alloced sections. |
1894 | In particular, any relocs in such sections should not affect GOT | |
1895 | and PLT reference counting (ie. we don't allow them to create GOT | |
1896 | or PLT entries), there's no possibility or desire to optimize TLS | |
1897 | relocs, and there's not much point in propagating relocs to shared | |
1898 | libs that the dynamic linker won't relocate. */ | |
1899 | if ((sec->flags & SEC_ALLOC) == 0) | |
1900 | return TRUE; | |
1901 | ||
0ffa91dd NC |
1902 | BFD_ASSERT (is_x86_64_elf (abfd)); |
1903 | ||
0afcef53 | 1904 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 | 1905 | if (htab == NULL) |
afd9acee L |
1906 | { |
1907 | sec->check_relocs_failed = 1; | |
1908 | return FALSE; | |
1909 | } | |
4dfe6ac6 | 1910 | |
bedfd056 L |
1911 | /* Get the section contents. */ |
1912 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1913 | contents = elf_section_data (sec)->this_hdr.contents; | |
1914 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1915 | { | |
1916 | sec->check_relocs_failed = 1; | |
1917 | return FALSE; | |
1918 | } | |
1919 | ||
0ffa91dd | 1920 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1921 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1922 | |
c434dee6 | 1923 | sreloc = NULL; |
cbe950e9 | 1924 | |
70256ad8 AJ |
1925 | rel_end = relocs + sec->reloc_count; |
1926 | for (rel = relocs; rel < rel_end; rel++) | |
1927 | { | |
bffbf940 | 1928 | unsigned int r_type; |
d42c267e | 1929 | unsigned int r_symndx; |
70256ad8 | 1930 | struct elf_link_hash_entry *h; |
0afcef53 | 1931 | struct elf_x86_link_hash_entry *eh; |
4c544807 L |
1932 | Elf_Internal_Sym *isym; |
1933 | const char *name; | |
06a6a421 | 1934 | bfd_boolean size_reloc; |
70256ad8 | 1935 | |
351f65ca L |
1936 | r_symndx = htab->r_sym (rel->r_info); |
1937 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1938 | |
1939 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1940 | { | |
695344c0 | 1941 | /* xgettext:c-format */ |
4eca0228 AM |
1942 | _bfd_error_handler (_("%B: bad symbol index: %d"), |
1943 | abfd, r_symndx); | |
afd9acee | 1944 | goto error_return; |
c434dee6 AJ |
1945 | } |
1946 | ||
70256ad8 | 1947 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1948 | { |
1949 | /* A local symbol. */ | |
c2e61a4e L |
1950 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1951 | abfd, r_symndx); | |
1952 | if (isym == NULL) | |
afd9acee | 1953 | goto error_return; |
c25bc9fc L |
1954 | |
1955 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1956 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1957 | { |
0afcef53 L |
1958 | h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, |
1959 | TRUE); | |
c25bc9fc | 1960 | if (h == NULL) |
afd9acee | 1961 | goto error_return; |
6bbec505 | 1962 | |
c25bc9fc | 1963 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
1964 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
1965 | isym, NULL); | |
c25bc9fc L |
1966 | h->type = STT_GNU_IFUNC; |
1967 | h->def_regular = 1; | |
1968 | h->ref_regular = 1; | |
1969 | h->forced_local = 1; | |
1970 | h->root.type = bfd_link_hash_defined; | |
1971 | } | |
1972 | else | |
1973 | h = NULL; | |
1974 | } | |
70256ad8 | 1975 | else |
71cb9464 | 1976 | { |
4c544807 | 1977 | isym = NULL; |
71cb9464 L |
1978 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1979 | while (h->root.type == bfd_link_hash_indirect | |
1980 | || h->root.type == bfd_link_hash_warning) | |
1981 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1982 | } |
cbe950e9 | 1983 | |
d1534d16 L |
1984 | /* Check invalid x32 relocations. */ |
1985 | if (!ABI_64_P (abfd)) | |
1986 | switch (r_type) | |
1987 | { | |
1988 | default: | |
1989 | break; | |
1990 | ||
d1534d16 L |
1991 | case R_X86_64_DTPOFF64: |
1992 | case R_X86_64_TPOFF64: | |
1993 | case R_X86_64_PC64: | |
1994 | case R_X86_64_GOTOFF64: | |
1995 | case R_X86_64_GOT64: | |
1996 | case R_X86_64_GOTPCREL64: | |
1997 | case R_X86_64_GOTPC64: | |
1998 | case R_X86_64_GOTPLT64: | |
1999 | case R_X86_64_PLTOFF64: | |
2000 | { | |
2001 | if (h) | |
2002 | name = h->root.root.string; | |
2003 | else | |
2004 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
2005 | NULL); | |
4eca0228 | 2006 | _bfd_error_handler |
695344c0 | 2007 | /* xgettext:c-format */ |
d1534d16 L |
2008 | (_("%B: relocation %s against symbol `%s' isn't " |
2009 | "supported in x32 mode"), abfd, | |
2010 | x86_64_elf_howto_table[r_type].name, name); | |
2011 | bfd_set_error (bfd_error_bad_value); | |
afd9acee | 2012 | goto error_return; |
d1534d16 L |
2013 | } |
2014 | break; | |
2015 | } | |
2016 | ||
c25bc9fc L |
2017 | if (h != NULL) |
2018 | { | |
ad1e85de L |
2019 | /* It is referenced by a non-shared object. */ |
2020 | h->ref_regular = 1; | |
bc4e12de | 2021 | h->root.non_ir_ref_regular = 1; |
13a2df29 L |
2022 | |
2023 | if (h->type == STT_GNU_IFUNC) | |
2024 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
2025 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 2026 | } |
70256ad8 | 2027 | |
bedfd056 | 2028 | if (! elf_x86_64_tls_transition (info, abfd, sec, contents, |
351f65ca L |
2029 | symtab_hdr, sym_hashes, |
2030 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 2031 | rel, rel_end, h, r_symndx, FALSE)) |
afd9acee | 2032 | goto error_return; |
142411ca | 2033 | |
0afcef53 | 2034 | eh = (struct elf_x86_link_hash_entry *) h; |
bffbf940 | 2035 | switch (r_type) |
70256ad8 | 2036 | { |
bffbf940 | 2037 | case R_X86_64_TLSLD: |
0afcef53 | 2038 | htab->tls_ld_or_ldm_got.refcount += 1; |
bffbf940 JJ |
2039 | goto create_got; |
2040 | ||
2041 | case R_X86_64_TPOFF32: | |
0e1862bb | 2042 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
aab921ad | 2043 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2044 | &x86_64_elf_howto_table[r_type]); |
aec6b87e L |
2045 | if (eh != NULL) |
2046 | eh->has_got_reloc = 1; | |
bffbf940 | 2047 | break; |
c434dee6 | 2048 | |
bffbf940 | 2049 | case R_X86_64_GOTTPOFF: |
0e1862bb | 2050 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
2051 | info->flags |= DF_STATIC_TLS; |
2052 | /* Fall through */ | |
70256ad8 | 2053 | |
bffbf940 JJ |
2054 | case R_X86_64_GOT32: |
2055 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
2056 | case R_X86_64_GOTPCRELX: |
2057 | case R_X86_64_REX_GOTPCRELX: | |
bffbf940 | 2058 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
2059 | case R_X86_64_GOT64: |
2060 | case R_X86_64_GOTPCREL64: | |
2061 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
2062 | case R_X86_64_GOTPC32_TLSDESC: |
2063 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
2064 | /* This symbol requires a global offset table entry. */ |
2065 | { | |
2066 | int tls_type, old_tls_type; | |
2067 | ||
2068 | switch (r_type) | |
2069 | { | |
2070 | default: tls_type = GOT_NORMAL; break; | |
2071 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
2072 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
2073 | case R_X86_64_GOTPC32_TLSDESC: |
2074 | case R_X86_64_TLSDESC_CALL: | |
2075 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
2076 | } |
2077 | ||
2078 | if (h != NULL) | |
2079 | { | |
2080 | h->got.refcount += 1; | |
aec6b87e | 2081 | old_tls_type = eh->tls_type; |
bffbf940 JJ |
2082 | } |
2083 | else | |
2084 | { | |
2085 | bfd_signed_vma *local_got_refcounts; | |
2086 | ||
2087 | /* This is a global offset table entry for a local symbol. */ | |
2088 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2089 | if (local_got_refcounts == NULL) | |
2090 | { | |
2091 | bfd_size_type size; | |
2092 | ||
2093 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
2094 | size *= sizeof (bfd_signed_vma) |
2095 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
2096 | local_got_refcounts = ((bfd_signed_vma *) |
2097 | bfd_zalloc (abfd, size)); | |
2098 | if (local_got_refcounts == NULL) | |
afd9acee | 2099 | goto error_return; |
bffbf940 | 2100 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
0afcef53 | 2101 | elf_x86_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 2102 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
0afcef53 | 2103 | elf_x86_local_got_tls_type (abfd) |
67a4f2b7 | 2104 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
2105 | } |
2106 | local_got_refcounts[r_symndx] += 1; | |
2107 | old_tls_type | |
0afcef53 | 2108 | = elf_x86_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
2109 | } |
2110 | ||
2111 | /* If a TLS symbol is accessed using IE at least once, | |
2112 | there is no point to use dynamic model for it. */ | |
2113 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
2114 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
2115 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 2116 | { |
67a4f2b7 | 2117 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 2118 | tls_type = old_tls_type; |
67a4f2b7 AO |
2119 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2120 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2121 | tls_type |= old_tls_type; | |
bffbf940 JJ |
2122 | else |
2123 | { | |
09a24cbf | 2124 | if (h) |
4c544807 L |
2125 | name = h->root.root.string; |
2126 | else | |
2127 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
2128 | isym, NULL); | |
4eca0228 | 2129 | _bfd_error_handler |
695344c0 | 2130 | /* xgettext:c-format */ |
63a5468a AM |
2131 | (_("%B: '%s' accessed both as normal and" |
2132 | " thread local symbol"), | |
4c544807 | 2133 | abfd, name); |
68c4a57e | 2134 | bfd_set_error (bfd_error_bad_value); |
afd9acee | 2135 | goto error_return; |
bffbf940 JJ |
2136 | } |
2137 | } | |
2138 | ||
2139 | if (old_tls_type != tls_type) | |
2140 | { | |
aec6b87e L |
2141 | if (eh != NULL) |
2142 | eh->tls_type = tls_type; | |
bffbf940 | 2143 | else |
0afcef53 | 2144 | elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
2145 | } |
2146 | } | |
c434dee6 AJ |
2147 | /* Fall through */ |
2148 | ||
d6ab8113 JB |
2149 | case R_X86_64_GOTOFF64: |
2150 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2151 | case R_X86_64_GOTPC64: |
bffbf940 | 2152 | create_got: |
aec6b87e L |
2153 | if (eh != NULL) |
2154 | eh->has_got_reloc = 1; | |
70256ad8 AJ |
2155 | break; |
2156 | ||
2157 | case R_X86_64_PLT32: | |
c3320543 | 2158 | case R_X86_64_PLT32_BND: |
70256ad8 | 2159 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
2160 | actually build the entry in adjust_dynamic_symbol, |
2161 | because this might be a case of linking PIC code which is | |
2162 | never referenced by a dynamic object, in which case we | |
2163 | don't need to generate a procedure linkage table entry | |
2164 | after all. */ | |
70256ad8 AJ |
2165 | |
2166 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 2167 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
2168 | if (h == NULL) |
2169 | continue; | |
2170 | ||
aec6b87e | 2171 | eh->has_got_reloc = 1; |
f5385ebf | 2172 | h->needs_plt = 1; |
51b64d56 | 2173 | h->plt.refcount += 1; |
70256ad8 AJ |
2174 | break; |
2175 | ||
7b81dfbb AJ |
2176 | case R_X86_64_PLTOFF64: |
2177 | /* This tries to form the 'address' of a function relative | |
2178 | to GOT. For global symbols we need a PLT entry. */ | |
2179 | if (h != NULL) | |
2180 | { | |
2181 | h->needs_plt = 1; | |
2182 | h->plt.refcount += 1; | |
2183 | } | |
2184 | goto create_got; | |
2185 | ||
6a3e1bae L |
2186 | case R_X86_64_SIZE32: |
2187 | case R_X86_64_SIZE64: | |
06a6a421 | 2188 | size_reloc = TRUE; |
6a3e1bae L |
2189 | goto do_size; |
2190 | ||
248775ba L |
2191 | case R_X86_64_32: |
2192 | if (!ABI_64_P (abfd)) | |
2193 | goto pointer; | |
1a0670f3 | 2194 | /* Fall through. */ |
cc78d0af AJ |
2195 | case R_X86_64_8: |
2196 | case R_X86_64_16: | |
70256ad8 | 2197 | case R_X86_64_32S: |
338c190a L |
2198 | /* Check relocation overflow as these relocs may lead to |
2199 | run-time relocation overflow. Don't error out for | |
1b71fb54 | 2200 | sections we don't care about, such as debug sections or |
338c190a | 2201 | when relocation overflow check is disabled. */ |
4c10bbaa | 2202 | if (!info->no_reloc_overflow_check |
338c190a L |
2203 | && (bfd_link_pic (info) |
2204 | || (bfd_link_executable (info) | |
2205 | && h != NULL | |
2206 | && !h->def_regular | |
2207 | && h->def_dynamic | |
081b1afe | 2208 | && (sec->flags & SEC_READONLY) == 0))) |
aab921ad | 2209 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2210 | &x86_64_elf_howto_table[r_type]); |
1b71fb54 AJ |
2211 | /* Fall through. */ |
2212 | ||
c434dee6 AJ |
2213 | case R_X86_64_PC8: |
2214 | case R_X86_64_PC16: | |
70256ad8 | 2215 | case R_X86_64_PC32: |
c3320543 | 2216 | case R_X86_64_PC32_BND: |
d6ab8113 | 2217 | case R_X86_64_PC64: |
1b71fb54 | 2218 | case R_X86_64_64: |
248775ba | 2219 | pointer: |
aec6b87e L |
2220 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
2221 | eh->has_non_got_reloc = 1; | |
bf52d7c7 L |
2222 | /* We are called after all symbols have been resolved. Only |
2223 | relocation against STT_GNU_IFUNC symbol must go through | |
2224 | PLT. */ | |
d1ed1c7d L |
2225 | if (h != NULL |
2226 | && (bfd_link_executable (info) | |
bf52d7c7 | 2227 | || h->type == STT_GNU_IFUNC)) |
c434dee6 AJ |
2228 | { |
2229 | /* If this reloc is in a read-only section, we might | |
2230 | need a copy reloc. We can't check reliably at this | |
2231 | stage whether the section is read-only, as input | |
2232 | sections have not yet been mapped to output sections. | |
2233 | Tentatively set the flag for now, and correct in | |
2234 | adjust_dynamic_symbol. */ | |
f5385ebf | 2235 | h->non_got_ref = 1; |
c434dee6 | 2236 | |
233cc9c1 L |
2237 | /* We may need a .plt entry if the symbol is a function |
2238 | defined in a shared lib or is a STT_GNU_IFUNC function | |
2239 | referenced from the code or read-only section. */ | |
34bb2571 L |
2240 | if (!h->def_regular |
2241 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
233cc9c1 L |
2242 | h->plt.refcount += 1; |
2243 | ||
5db4f0d3 L |
2244 | if (r_type == R_X86_64_PC32) |
2245 | { | |
2246 | /* Since something like ".long foo - ." may be used | |
2247 | as pointer, make sure that PLT is used if foo is | |
2248 | a function defined in a shared library. */ | |
2249 | if ((sec->flags & SEC_CODE) == 0) | |
2250 | h->pointer_equality_needed = 1; | |
2251 | } | |
2252 | else if (r_type != R_X86_64_PC32_BND | |
2253 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
2254 | { |
2255 | h->pointer_equality_needed = 1; | |
2256 | /* At run-time, R_X86_64_64 can be resolved for both | |
2257 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
2258 | can only be resolved for x32. */ | |
2259 | if ((sec->flags & SEC_READONLY) == 0 | |
2260 | && (r_type == R_X86_64_64 | |
2261 | || (!ABI_64_P (abfd) | |
2262 | && (r_type == R_X86_64_32 | |
2263 | || r_type == R_X86_64_32S)))) | |
aec6b87e | 2264 | eh->func_pointer_refcount += 1; |
04ebc307 | 2265 | } |
c434dee6 | 2266 | } |
70256ad8 | 2267 | |
06a6a421 | 2268 | size_reloc = FALSE; |
6a3e1bae | 2269 | do_size: |
70256ad8 AJ |
2270 | /* If we are creating a shared library, and this is a reloc |
2271 | against a global symbol, or a non PC relative reloc | |
2272 | against a local symbol, then we need to copy the reloc | |
2273 | into the shared library. However, if we are linking with | |
2274 | -Bsymbolic, we do not need to copy a reloc against a | |
2275 | global symbol which is defined in an object we are | |
407443a3 | 2276 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
2277 | this point we have not seen all the input files, so it is |
2278 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
2279 | later (it is never cleared). In case of a weak definition, |
2280 | DEF_REGULAR may be cleared later by a strong definition in | |
2281 | a shared library. We account for that possibility below by | |
2282 | storing information in the relocs_copied field of the hash | |
2283 | table entry. A similar situation occurs when creating | |
2284 | shared libraries and symbol visibility changes render the | |
31c0ebfe | 2285 | symbol local. |
c434dee6 AJ |
2286 | |
2287 | If on the other hand, we are creating an executable, we | |
2288 | may need to keep relocations for symbols satisfied by a | |
2289 | dynamic library if we manage to avoid copy relocs for the | |
233cc9c1 L |
2290 | symbol. |
2291 | ||
2292 | Generate dynamic pointer relocation against STT_GNU_IFUNC | |
2293 | symbol in the non-code section. */ | |
081b1afe L |
2294 | if ((bfd_link_pic (info) |
2295 | && (! IS_X86_64_PCREL_TYPE (r_type) | |
2296 | || (h != NULL | |
2297 | && (! (bfd_link_pie (info) | |
2298 | || SYMBOLIC_BIND (info, h)) | |
2299 | || h->root.type == bfd_link_hash_defweak | |
2300 | || !h->def_regular)))) | |
233cc9c1 L |
2301 | || (h != NULL |
2302 | && h->type == STT_GNU_IFUNC | |
2303 | && r_type == htab->pointer_r_type | |
2304 | && (sec->flags & SEC_CODE) == 0) | |
081b1afe L |
2305 | || (ELIMINATE_COPY_RELOCS |
2306 | && !bfd_link_pic (info) | |
2307 | && h != NULL | |
2308 | && (h->root.type == bfd_link_hash_defweak | |
2309 | || !h->def_regular))) | |
70256ad8 | 2310 | { |
e03a8ed8 L |
2311 | struct elf_dyn_relocs *p; |
2312 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2313 | |
2314 | /* We must copy these reloc types into the output file. | |
2315 | Create a reloc section in dynobj and make room for | |
2316 | this reloc. */ | |
70256ad8 AJ |
2317 | if (sreloc == NULL) |
2318 | { | |
83bac4b0 | 2319 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
2320 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
2321 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 2322 | |
70256ad8 | 2323 | if (sreloc == NULL) |
afd9acee | 2324 | goto error_return; |
70256ad8 AJ |
2325 | } |
2326 | ||
c434dee6 AJ |
2327 | /* If this is a global symbol, we count the number of |
2328 | relocations we need for this symbol. */ | |
2329 | if (h != NULL) | |
aec6b87e | 2330 | head = &eh->dyn_relocs; |
c434dee6 AJ |
2331 | else |
2332 | { | |
2333 | /* Track dynamic relocs needed for local syms too. | |
2334 | We really need local syms available to do this | |
2335 | easily. Oh well. */ | |
c434dee6 | 2336 | asection *s; |
87d72d41 | 2337 | void **vpp; |
87d72d41 AM |
2338 | |
2339 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2340 | abfd, r_symndx); | |
2341 | if (isym == NULL) | |
afd9acee | 2342 | goto error_return; |
87d72d41 AM |
2343 | |
2344 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2345 | if (s == NULL) |
87d72d41 | 2346 | s = sec; |
70256ad8 | 2347 | |
e81d3500 DD |
2348 | /* Beware of type punned pointers vs strict aliasing |
2349 | rules. */ | |
2350 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2351 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2352 | } |
70256ad8 | 2353 | |
c434dee6 AJ |
2354 | p = *head; |
2355 | if (p == NULL || p->sec != sec) | |
2356 | { | |
2357 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 2358 | |
e03a8ed8 | 2359 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2360 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2361 | if (p == NULL) |
afd9acee | 2362 | goto error_return; |
c434dee6 AJ |
2363 | p->next = *head; |
2364 | *head = p; | |
2365 | p->sec = sec; | |
2366 | p->count = 0; | |
2367 | p->pc_count = 0; | |
70256ad8 | 2368 | } |
c434dee6 AJ |
2369 | |
2370 | p->count += 1; | |
06a6a421 L |
2371 | /* Count size relocation as PC-relative relocation. */ |
2372 | if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc) | |
c434dee6 | 2373 | p->pc_count += 1; |
70256ad8 AJ |
2374 | } |
2375 | break; | |
fe4770f4 AJ |
2376 | |
2377 | /* This relocation describes the C++ object vtable hierarchy. | |
2378 | Reconstruct it for later use during GC. */ | |
2379 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2380 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
afd9acee | 2381 | goto error_return; |
fe4770f4 AJ |
2382 | break; |
2383 | ||
2384 | /* This relocation describes which C++ vtable entries are actually | |
2385 | used. Record for later use during GC. */ | |
2386 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
2387 | BFD_ASSERT (h != NULL); |
2388 | if (h != NULL | |
2389 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
afd9acee | 2390 | goto error_return; |
fe4770f4 | 2391 | break; |
c434dee6 AJ |
2392 | |
2393 | default: | |
2394 | break; | |
70256ad8 | 2395 | } |
dd7e64d4 | 2396 | |
56ceb5b5 L |
2397 | if ((r_type == R_X86_64_GOTPCREL |
2398 | || r_type == R_X86_64_GOTPCRELX | |
2399 | || r_type == R_X86_64_REX_GOTPCRELX) | |
c1d11331 | 2400 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
56ceb5b5 | 2401 | sec->need_convert_load = 1; |
70256ad8 AJ |
2402 | } |
2403 | ||
bedfd056 L |
2404 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2405 | { | |
2406 | if (!info->keep_memory) | |
2407 | free (contents); | |
2408 | else | |
2409 | { | |
2410 | /* Cache the section contents for elf_link_input_bfd. */ | |
2411 | elf_section_data (sec)->this_hdr.contents = contents; | |
2412 | } | |
2413 | } | |
2414 | ||
b34976b6 | 2415 | return TRUE; |
afd9acee L |
2416 | |
2417 | error_return: | |
bedfd056 L |
2418 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2419 | free (contents); | |
afd9acee L |
2420 | sec->check_relocs_failed = 1; |
2421 | return FALSE; | |
70256ad8 AJ |
2422 | } |
2423 | ||
2424 | /* Return the section that should be marked against GC for a given | |
407443a3 | 2425 | relocation. */ |
70256ad8 AJ |
2426 | |
2427 | static asection * | |
351f65ca L |
2428 | elf_x86_64_gc_mark_hook (asection *sec, |
2429 | struct bfd_link_info *info, | |
2430 | Elf_Internal_Rela *rel, | |
2431 | struct elf_link_hash_entry *h, | |
2432 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
2433 | { |
2434 | if (h != NULL) | |
351f65ca | 2435 | switch (ELF32_R_TYPE (rel->r_info)) |
07adf181 AM |
2436 | { |
2437 | case R_X86_64_GNU_VTINHERIT: | |
2438 | case R_X86_64_GNU_VTENTRY: | |
2439 | return NULL; | |
2440 | } | |
2441 | ||
2442 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
2443 | } |
2444 | ||
70256ad8 AJ |
2445 | /* Adjust a symbol defined by a dynamic object and referenced by a |
2446 | regular object. The current definition is in some section of the | |
2447 | dynamic object, but we're not including those sections. We have to | |
2448 | change the definition to something the rest of the link can | |
407443a3 | 2449 | understand. */ |
70256ad8 | 2450 | |
b34976b6 | 2451 | static bfd_boolean |
351f65ca L |
2452 | elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
2453 | struct elf_link_hash_entry *h) | |
70256ad8 | 2454 | { |
0afcef53 | 2455 | struct elf_x86_link_hash_table *htab; |
5474d94f | 2456 | asection *s, *srel; |
0afcef53 | 2457 | struct elf_x86_link_hash_entry *eh; |
5ca5bb35 | 2458 | struct elf_dyn_relocs *p; |
70256ad8 | 2459 | |
cbe950e9 L |
2460 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2461 | if (h->type == STT_GNU_IFUNC) | |
2462 | { | |
73bcf233 L |
2463 | /* All local STT_GNU_IFUNC references must be treate as local |
2464 | calls via local PLT. */ | |
5ca5bb35 L |
2465 | if (h->ref_regular |
2466 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2467 | { | |
73bcf233 | 2468 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2469 | struct elf_dyn_relocs **pp; |
2470 | ||
0afcef53 | 2471 | eh = (struct elf_x86_link_hash_entry *) h; |
5ca5bb35 L |
2472 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
2473 | { | |
2474 | pc_count += p->pc_count; | |
2475 | p->count -= p->pc_count; | |
2476 | p->pc_count = 0; | |
73bcf233 | 2477 | count += p->count; |
5ca5bb35 L |
2478 | if (p->count == 0) |
2479 | *pp = p->next; | |
2480 | else | |
2481 | pp = &p->next; | |
2482 | } | |
2483 | ||
73bcf233 | 2484 | if (pc_count || count) |
5ca5bb35 | 2485 | { |
5ca5bb35 | 2486 | h->non_got_ref = 1; |
233cc9c1 L |
2487 | if (pc_count) |
2488 | { | |
2489 | /* Increment PLT reference count only for PC-relative | |
2490 | references. */ | |
2491 | h->needs_plt = 1; | |
2492 | if (h->plt.refcount <= 0) | |
2493 | h->plt.refcount = 1; | |
2494 | else | |
2495 | h->plt.refcount += 1; | |
2496 | } | |
5ca5bb35 L |
2497 | } |
2498 | } | |
2499 | ||
cbe950e9 L |
2500 | if (h->plt.refcount <= 0) |
2501 | { | |
2502 | h->plt.offset = (bfd_vma) -1; | |
2503 | h->needs_plt = 0; | |
2504 | } | |
2505 | return TRUE; | |
2506 | } | |
2507 | ||
70256ad8 AJ |
2508 | /* If this is a function, put it in the procedure linkage table. We |
2509 | will fill in the contents of the procedure linkage table later, | |
2510 | when we know the address of the .got section. */ | |
2511 | if (h->type == STT_FUNC | |
f5385ebf | 2512 | || h->needs_plt) |
70256ad8 | 2513 | { |
c434dee6 | 2514 | if (h->plt.refcount <= 0 |
27482721 AJ |
2515 | || SYMBOL_CALLS_LOCAL (info, h) |
2516 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2517 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 2518 | { |
70256ad8 AJ |
2519 | /* This case can occur if we saw a PLT32 reloc in an input |
2520 | file, but the symbol was never referred to by a dynamic | |
2521 | object, or if all references were garbage collected. In | |
2522 | such a case, we don't actually need to build a procedure | |
2523 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 2524 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2525 | h->needs_plt = 0; |
70256ad8 AJ |
2526 | } |
2527 | ||
b34976b6 | 2528 | return TRUE; |
70256ad8 | 2529 | } |
bbd7ec4a | 2530 | else |
c434dee6 AJ |
2531 | /* It's possible that we incorrectly decided a .plt reloc was |
2532 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
2533 | check_relocs. We can't decide accurately between function and | |
2534 | non-function syms in check-relocs; Objects loaded later in | |
2535 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2536 | h->plt.offset = (bfd_vma) -1; |
70256ad8 | 2537 | |
0afcef53 | 2538 | eh = (struct elf_x86_link_hash_entry *) h; |
a5b4ee94 | 2539 | |
70256ad8 AJ |
2540 | /* If this is a weak symbol, and there is a real definition, the |
2541 | processor independent code will have arranged for us to see the | |
407443a3 | 2542 | real definition first, and we can just use the same value. */ |
f6e332e6 | 2543 | if (h->u.weakdef != NULL) |
70256ad8 | 2544 | { |
f6e332e6 AM |
2545 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2546 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2547 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2548 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
a5b4ee94 L |
2549 | if (ELIMINATE_COPY_RELOCS |
2550 | || info->nocopyreloc | |
2551 | || SYMBOL_NO_COPYRELOC (info, eh)) | |
bc696fd5 | 2552 | { |
bc696fd5 L |
2553 | h->non_got_ref = h->u.weakdef->non_got_ref; |
2554 | eh->needs_copy = h->u.weakdef->needs_copy; | |
2555 | } | |
b34976b6 | 2556 | return TRUE; |
70256ad8 AJ |
2557 | } |
2558 | ||
2559 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 2560 | is not a function. */ |
70256ad8 AJ |
2561 | |
2562 | /* If we are creating a shared library, we must presume that the | |
2563 | only references to the symbol are via the global offset table. | |
2564 | For such cases we need not do anything here; the relocations will | |
407443a3 | 2565 | be handled correctly by relocate_section. */ |
0e1862bb | 2566 | if (!bfd_link_executable (info)) |
b34976b6 | 2567 | return TRUE; |
70256ad8 AJ |
2568 | |
2569 | /* If there are no references to this symbol that do not use the | |
2570 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 2571 | if (!h->non_got_ref) |
b34976b6 | 2572 | return TRUE; |
70256ad8 | 2573 | |
c434dee6 | 2574 | /* If -z nocopyreloc was given, we won't generate them either. */ |
a5b4ee94 | 2575 | if (info->nocopyreloc || SYMBOL_NO_COPYRELOC (info, eh)) |
c434dee6 | 2576 | { |
f5385ebf | 2577 | h->non_got_ref = 0; |
b34976b6 | 2578 | return TRUE; |
c434dee6 AJ |
2579 | } |
2580 | ||
31c0ebfe | 2581 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 2582 | { |
0afcef53 | 2583 | eh = (struct elf_x86_link_hash_entry *) h; |
d40d037c AJ |
2584 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2585 | { | |
2586 | s = p->sec->output_section; | |
2587 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2588 | break; | |
2589 | } | |
2590 | ||
2591 | /* If we didn't find any dynamic relocs in read-only sections, then | |
2592 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
2593 | if (p == NULL) | |
2594 | { | |
f5385ebf | 2595 | h->non_got_ref = 0; |
d40d037c AJ |
2596 | return TRUE; |
2597 | } | |
c434dee6 AJ |
2598 | } |
2599 | ||
70256ad8 | 2600 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 2601 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
2602 | an entry for this symbol in the .dynsym section. The dynamic |
2603 | object will contain position independent code, so all references | |
2604 | from the dynamic object to this symbol will go through the global | |
2605 | offset table. The dynamic linker will use the .dynsym entry to | |
2606 | determine the address it must put in the global offset table, so | |
2607 | both the dynamic object and the regular object will refer to the | |
2608 | same memory location for the variable. */ | |
2609 | ||
0afcef53 | 2610 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
2611 | if (htab == NULL) |
2612 | return FALSE; | |
70256ad8 AJ |
2613 | |
2614 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
2615 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 2616 | runtime process image. */ |
5474d94f AM |
2617 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
2618 | { | |
2619 | s = htab->elf.sdynrelro; | |
2620 | srel = htab->elf.sreldynrelro; | |
2621 | } | |
2622 | else | |
2623 | { | |
2624 | s = htab->elf.sdynbss; | |
2625 | srel = htab->elf.srelbss; | |
2626 | } | |
1d7e9d18 | 2627 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
70256ad8 | 2628 | { |
351f65ca L |
2629 | const struct elf_backend_data *bed; |
2630 | bed = get_elf_backend_data (info->output_bfd); | |
5474d94f | 2631 | srel->size += bed->s->sizeof_rela; |
f5385ebf | 2632 | h->needs_copy = 1; |
70256ad8 AJ |
2633 | } |
2634 | ||
6cabe1ea | 2635 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
70256ad8 AJ |
2636 | } |
2637 | ||
c434dee6 AJ |
2638 | /* Allocate space in .plt, .got and associated reloc sections for |
2639 | dynamic relocs. */ | |
2640 | ||
b34976b6 | 2641 | static bfd_boolean |
351f65ca | 2642 | elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
2643 | { |
2644 | struct bfd_link_info *info; | |
0afcef53 L |
2645 | struct elf_x86_link_hash_table *htab; |
2646 | struct elf_x86_link_hash_entry *eh; | |
e03a8ed8 | 2647 | struct elf_dyn_relocs *p; |
351f65ca | 2648 | const struct elf_backend_data *bed; |
eed180f8 | 2649 | unsigned int plt_entry_size; |
aec6b87e | 2650 | bfd_boolean resolved_to_zero; |
c434dee6 | 2651 | |
e92d460e | 2652 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2653 | return TRUE; |
c434dee6 | 2654 | |
0afcef53 | 2655 | eh = (struct elf_x86_link_hash_entry *) h; |
e92d460e | 2656 | |
c434dee6 | 2657 | info = (struct bfd_link_info *) inf; |
0afcef53 | 2658 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
2659 | if (htab == NULL) |
2660 | return FALSE; | |
351f65ca | 2661 | bed = get_elf_backend_data (info->output_bfd); |
0afcef53 | 2662 | |
765e526c | 2663 | plt_entry_size = htab->plt.plt_entry_size; |
c434dee6 | 2664 | |
e62b9723 | 2665 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
0afcef53 | 2666 | X86_64_ELF_DATA, |
e62b9723 L |
2667 | eh->has_got_reloc, |
2668 | eh); | |
aec6b87e | 2669 | |
dd7e64d4 L |
2670 | /* We can't use the GOT PLT if pointer equality is needed since |
2671 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
2672 | linker won't update the GOT slot. We will get into an infinite | |
2673 | loop at run-time. */ | |
2674 | if (htab->plt_got != NULL | |
2675 | && h->type != STT_GNU_IFUNC | |
2676 | && !h->pointer_equality_needed | |
2677 | && h->plt.refcount > 0 | |
2678 | && h->got.refcount > 0) | |
2679 | { | |
2680 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
2681 | reloctions. */ | |
2682 | h->plt.offset = (bfd_vma) -1; | |
2683 | ||
2684 | /* Use the GOT PLT. */ | |
2685 | eh->plt_got.refcount = 1; | |
2686 | } | |
2687 | ||
04ebc307 L |
2688 | /* Clear the reference count of function pointer relocations if |
2689 | symbol isn't a normal function. */ | |
2690 | if (h->type != STT_FUNC) | |
2691 | eh->func_pointer_refcount = 0; | |
2692 | ||
cbe950e9 L |
2693 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2694 | here if it is defined and referenced in a non-shared object. */ | |
2695 | if (h->type == STT_GNU_IFUNC | |
2696 | && h->def_regular) | |
0ff2b86e L |
2697 | { |
2698 | if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, | |
2699 | &eh->dyn_relocs, | |
2df3368d | 2700 | &htab->readonly_dynrelocs_against_ifunc, |
0ff2b86e | 2701 | plt_entry_size, |
765e526c | 2702 | (htab->plt.has_plt0 |
38b12349 | 2703 | * plt_entry_size), |
233cc9c1 | 2704 | GOT_ENTRY_SIZE, TRUE)) |
0ff2b86e | 2705 | { |
f2c29a16 | 2706 | asection *s = htab->plt_second; |
0ff2b86e L |
2707 | if (h->plt.offset != (bfd_vma) -1 && s != NULL) |
2708 | { | |
f2c29a16 L |
2709 | /* Use the second PLT section if it is created. */ |
2710 | eh->plt_second.offset = s->size; | |
0ff2b86e | 2711 | |
f2c29a16 | 2712 | /* Make room for this entry in the second PLT section. */ |
765e526c | 2713 | s->size += htab->non_lazy_plt->plt_entry_size; |
0ff2b86e L |
2714 | } |
2715 | ||
2716 | return TRUE; | |
2717 | } | |
2718 | else | |
2719 | return FALSE; | |
2720 | } | |
04ebc307 L |
2721 | /* Don't create the PLT entry if there are only function pointer |
2722 | relocations which can be resolved at run-time. */ | |
cbe950e9 | 2723 | else if (htab->elf.dynamic_sections_created |
04ebc307 L |
2724 | && (h->plt.refcount > eh->func_pointer_refcount |
2725 | || eh->plt_got.refcount > 0)) | |
c434dee6 | 2726 | { |
dc2be3d2 | 2727 | bfd_boolean use_plt_got = eh->plt_got.refcount > 0; |
25070364 | 2728 | |
04ebc307 L |
2729 | /* Clear the reference count of function pointer relocations |
2730 | if PLT is used. */ | |
2731 | eh->func_pointer_refcount = 0; | |
2732 | ||
c434dee6 AJ |
2733 | /* Make sure this symbol is output as a dynamic symbol. |
2734 | Undefined weak syms won't yet be marked as dynamic. */ | |
2735 | if (h->dynindx == -1 | |
aec6b87e | 2736 | && !h->forced_local |
9e9821dd L |
2737 | && !resolved_to_zero |
2738 | && h->root.type == bfd_link_hash_undefweak) | |
c434dee6 | 2739 | { |
c152c796 | 2740 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2741 | return FALSE; |
c434dee6 AJ |
2742 | } |
2743 | ||
0e1862bb | 2744 | if (bfd_link_pic (info) |
27482721 | 2745 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
c434dee6 | 2746 | { |
6de2ae4a | 2747 | asection *s = htab->elf.splt; |
f2c29a16 | 2748 | asection *second_s = htab->plt_second; |
dd7e64d4 | 2749 | asection *got_s = htab->plt_got; |
c434dee6 | 2750 | |
7c1e8d3e L |
2751 | /* If this is the first .plt entry, make room for the special |
2752 | first entry. The .plt section is used by prelink to undo | |
2753 | prelinking for dynamic relocations. */ | |
2754 | if (s->size == 0) | |
765e526c | 2755 | s->size = htab->plt.has_plt0 * plt_entry_size; |
7c1e8d3e | 2756 | |
dd7e64d4 L |
2757 | if (use_plt_got) |
2758 | eh->plt_got.offset = got_s->size; | |
2759 | else | |
2760 | { | |
2761 | h->plt.offset = s->size; | |
f2c29a16 L |
2762 | if (second_s) |
2763 | eh->plt_second.offset = second_s->size; | |
dd7e64d4 | 2764 | } |
c434dee6 AJ |
2765 | |
2766 | /* If this symbol is not defined in a regular file, and we are | |
2767 | not generating a shared library, then set the symbol to this | |
2768 | location in the .plt. This is required to make function | |
2769 | pointers compare as equal between the normal executable and | |
2770 | the shared library. */ | |
0e1862bb | 2771 | if (! bfd_link_pic (info) |
f5385ebf | 2772 | && !h->def_regular) |
c434dee6 | 2773 | { |
dd7e64d4 | 2774 | if (use_plt_got) |
0ff2b86e | 2775 | { |
dd7e64d4 L |
2776 | /* We need to make a call to the entry of the GOT PLT |
2777 | instead of regular PLT entry. */ | |
2778 | h->root.u.def.section = got_s; | |
2779 | h->root.u.def.value = eh->plt_got.offset; | |
0ff2b86e L |
2780 | } |
2781 | else | |
2782 | { | |
f2c29a16 | 2783 | if (second_s) |
dd7e64d4 | 2784 | { |
f2c29a16 L |
2785 | /* We need to make a call to the entry of the |
2786 | second PLT instead of regular PLT entry. */ | |
2787 | h->root.u.def.section = second_s; | |
2788 | h->root.u.def.value = eh->plt_second.offset; | |
dd7e64d4 L |
2789 | } |
2790 | else | |
2791 | { | |
2792 | h->root.u.def.section = s; | |
2793 | h->root.u.def.value = h->plt.offset; | |
2794 | } | |
0ff2b86e | 2795 | } |
c434dee6 AJ |
2796 | } |
2797 | ||
2798 | /* Make room for this entry. */ | |
dd7e64d4 | 2799 | if (use_plt_got) |
765e526c | 2800 | got_s->size += htab->non_lazy_plt->plt_entry_size; |
dd7e64d4 L |
2801 | else |
2802 | { | |
2803 | s->size += plt_entry_size; | |
f2c29a16 | 2804 | if (second_s) |
765e526c | 2805 | second_s->size += htab->non_lazy_plt->plt_entry_size; |
c434dee6 | 2806 | |
dd7e64d4 L |
2807 | /* We also need to make an entry in the .got.plt section, |
2808 | which will be placed in the .got section by the linker | |
2809 | script. */ | |
2810 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; | |
c434dee6 | 2811 | |
aec6b87e L |
2812 | /* There should be no PLT relocation against resolved |
2813 | undefined weak symbol in executable. */ | |
2814 | if (!resolved_to_zero) | |
2815 | { | |
2816 | /* We also need to make an entry in the .rela.plt | |
2817 | section. */ | |
2818 | htab->elf.srelplt->size += bed->s->sizeof_rela; | |
2819 | htab->elf.srelplt->reloc_count++; | |
2820 | } | |
dd7e64d4 | 2821 | } |
c434dee6 AJ |
2822 | } |
2823 | else | |
2824 | { | |
13f42277 | 2825 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 2826 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2827 | h->needs_plt = 0; |
c434dee6 AJ |
2828 | } |
2829 | } | |
2830 | else | |
2831 | { | |
13f42277 | 2832 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 2833 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2834 | h->needs_plt = 0; |
c434dee6 AJ |
2835 | } |
2836 | ||
67a4f2b7 AO |
2837 | eh->tlsdesc_got = (bfd_vma) -1; |
2838 | ||
bffbf940 JJ |
2839 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
2840 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
2841 | if (h->got.refcount > 0 | |
0e1862bb | 2842 | && bfd_link_executable (info) |
bffbf940 | 2843 | && h->dynindx == -1 |
0afcef53 | 2844 | && elf_x86_hash_entry (h)->tls_type == GOT_TLS_IE) |
d8045f23 NC |
2845 | { |
2846 | h->got.offset = (bfd_vma) -1; | |
2847 | } | |
bffbf940 | 2848 | else if (h->got.refcount > 0) |
c434dee6 AJ |
2849 | { |
2850 | asection *s; | |
b34976b6 | 2851 | bfd_boolean dyn; |
0afcef53 | 2852 | int tls_type = elf_x86_hash_entry (h)->tls_type; |
c434dee6 AJ |
2853 | |
2854 | /* Make sure this symbol is output as a dynamic symbol. | |
2855 | Undefined weak syms won't yet be marked as dynamic. */ | |
2856 | if (h->dynindx == -1 | |
aec6b87e | 2857 | && !h->forced_local |
9e9821dd L |
2858 | && !resolved_to_zero |
2859 | && h->root.type == bfd_link_hash_undefweak) | |
c434dee6 | 2860 | { |
c152c796 | 2861 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2862 | return FALSE; |
c434dee6 AJ |
2863 | } |
2864 | ||
67a4f2b7 AO |
2865 | if (GOT_TLS_GDESC_P (tls_type)) |
2866 | { | |
6de2ae4a | 2867 | eh->tlsdesc_got = htab->elf.sgotplt->size |
351f65ca | 2868 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2869 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2870 | h->got.offset = (bfd_vma) -2; |
2871 | } | |
2872 | if (! GOT_TLS_GDESC_P (tls_type) | |
2873 | || GOT_TLS_GD_P (tls_type)) | |
2874 | { | |
6de2ae4a | 2875 | s = htab->elf.sgot; |
67a4f2b7 AO |
2876 | h->got.offset = s->size; |
2877 | s->size += GOT_ENTRY_SIZE; | |
2878 | if (GOT_TLS_GD_P (tls_type)) | |
2879 | s->size += GOT_ENTRY_SIZE; | |
2880 | } | |
c434dee6 | 2881 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 | 2882 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
aec6b87e L |
2883 | and two if global. R_X86_64_GOTTPOFF needs one dynamic |
2884 | relocation. No dynamic relocation against resolved undefined | |
2885 | weak symbol in executable. */ | |
67a4f2b7 | 2886 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 2887 | || tls_type == GOT_TLS_IE) |
351f65ca | 2888 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 | 2889 | else if (GOT_TLS_GD_P (tls_type)) |
351f65ca | 2890 | htab->elf.srelgot->size += 2 * bed->s->sizeof_rela; |
67a4f2b7 | 2891 | else if (! GOT_TLS_GDESC_P (tls_type) |
aec6b87e L |
2892 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
2893 | && !resolved_to_zero) | |
67a4f2b7 | 2894 | || h->root.type != bfd_link_hash_undefweak) |
0e1862bb | 2895 | && (bfd_link_pic (info) |
27482721 | 2896 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
351f65ca | 2897 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2898 | if (GOT_TLS_GDESC_P (tls_type)) |
2899 | { | |
351f65ca | 2900 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2901 | htab->tlsdesc_plt = (bfd_vma) -1; |
2902 | } | |
c434dee6 AJ |
2903 | } |
2904 | else | |
2905 | h->got.offset = (bfd_vma) -1; | |
2906 | ||
c434dee6 | 2907 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2908 | return TRUE; |
c434dee6 AJ |
2909 | |
2910 | /* In the shared -Bsymbolic case, discard space allocated for | |
2911 | dynamic pc-relative relocs against symbols which turn out to be | |
2912 | defined in regular objects. For the normal shared case, discard | |
2913 | space for pc-relative relocs that have become local due to symbol | |
2914 | visibility changes. */ | |
2915 | ||
0e1862bb | 2916 | if (bfd_link_pic (info)) |
c434dee6 | 2917 | { |
27482721 AJ |
2918 | /* Relocs that use pc_count are those that appear on a call |
2919 | insn, or certain REL relocs that can generated via assembly. | |
2920 | We want calls to protected symbols to resolve directly to the | |
2921 | function rather than going via the plt. If people want | |
2922 | function pointer comparisons to work as expected then they | |
2923 | should avoid writing weird assembly. */ | |
2924 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 2925 | { |
e03a8ed8 | 2926 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
2927 | |
2928 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2929 | { | |
c3ce498c L |
2930 | p->count -= p->pc_count; |
2931 | p->pc_count = 0; | |
c434dee6 AJ |
2932 | if (p->count == 0) |
2933 | *pp = p->next; | |
2934 | else | |
2935 | pp = &p->next; | |
2936 | } | |
2937 | } | |
4e795f50 AM |
2938 | |
2939 | /* Also discard relocs on undefined weak syms with non-default | |
aec6b87e | 2940 | visibility or in PIE. */ |
31c0ebfe | 2941 | if (eh->dyn_relocs != NULL) |
22d606e9 | 2942 | { |
31c0ebfe L |
2943 | if (h->root.type == bfd_link_hash_undefweak) |
2944 | { | |
aec6b87e L |
2945 | /* Undefined weak symbol is never bound locally in shared |
2946 | library. */ | |
2947 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2948 | || resolved_to_zero) | |
31c0ebfe | 2949 | eh->dyn_relocs = NULL; |
31c0ebfe L |
2950 | else if (h->dynindx == -1 |
2951 | && ! h->forced_local | |
2952 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2953 | return FALSE; | |
2954 | } | |
9d1d54d5 L |
2955 | /* For PIE, discard space for pc-relative relocs against |
2956 | symbols which turn out to need copy relocs. */ | |
0e1862bb | 2957 | else if (bfd_link_executable (info) |
bc696fd5 | 2958 | && (h->needs_copy || eh->needs_copy) |
31c0ebfe L |
2959 | && h->def_dynamic |
2960 | && !h->def_regular) | |
9d1d54d5 L |
2961 | { |
2962 | struct elf_dyn_relocs **pp; | |
2963 | ||
2964 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2965 | { | |
2966 | if (p->pc_count != 0) | |
2967 | *pp = p->next; | |
2968 | else | |
2969 | pp = &p->next; | |
2970 | } | |
2971 | } | |
22d606e9 | 2972 | } |
d8045f23 | 2973 | } |
d40d037c | 2974 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
2975 | { |
2976 | /* For the non-shared case, discard space for relocs against | |
2977 | symbols which turn out to need copy relocs or are not | |
04ebc307 L |
2978 | dynamic. Keep dynamic relocations for run-time function |
2979 | pointer initialization. */ | |
c434dee6 | 2980 | |
aec6b87e L |
2981 | if ((!h->non_got_ref |
2982 | || eh->func_pointer_refcount > 0 | |
2983 | || (h->root.type == bfd_link_hash_undefweak | |
2984 | && !resolved_to_zero)) | |
f5385ebf AM |
2985 | && ((h->def_dynamic |
2986 | && !h->def_regular) | |
c434dee6 AJ |
2987 | || (htab->elf.dynamic_sections_created |
2988 | && (h->root.type == bfd_link_hash_undefweak | |
2989 | || h->root.type == bfd_link_hash_undefined)))) | |
2990 | { | |
2991 | /* Make sure this symbol is output as a dynamic symbol. | |
2992 | Undefined weak syms won't yet be marked as dynamic. */ | |
2993 | if (h->dynindx == -1 | |
d8045f23 | 2994 | && ! h->forced_local |
aec6b87e | 2995 | && ! resolved_to_zero |
9e9821dd | 2996 | && h->root.type == bfd_link_hash_undefweak |
d8045f23 NC |
2997 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
2998 | return FALSE; | |
c434dee6 AJ |
2999 | |
3000 | /* If that succeeded, we know we'll be keeping all the | |
3001 | relocs. */ | |
3002 | if (h->dynindx != -1) | |
3003 | goto keep; | |
3004 | } | |
3005 | ||
3006 | eh->dyn_relocs = NULL; | |
04ebc307 | 3007 | eh->func_pointer_refcount = 0; |
c434dee6 AJ |
3008 | |
3009 | keep: ; | |
3010 | } | |
3011 | ||
3012 | /* Finally, allocate space. */ | |
3013 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
3014 | { | |
e7c33416 NC |
3015 | asection * sreloc; |
3016 | ||
cbe950e9 | 3017 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
3018 | |
3019 | BFD_ASSERT (sreloc != NULL); | |
3020 | ||
351f65ca | 3021 | sreloc->size += p->count * bed->s->sizeof_rela; |
c434dee6 AJ |
3022 | } |
3023 | ||
b34976b6 | 3024 | return TRUE; |
c434dee6 AJ |
3025 | } |
3026 | ||
c25bc9fc L |
3027 | /* Allocate space in .plt, .got and associated reloc sections for |
3028 | local dynamic relocs. */ | |
3029 | ||
3030 | static bfd_boolean | |
351f65ca | 3031 | elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf) |
c25bc9fc L |
3032 | { |
3033 | struct elf_link_hash_entry *h | |
3034 | = (struct elf_link_hash_entry *) *slot; | |
3035 | ||
3036 | if (h->type != STT_GNU_IFUNC | |
3037 | || !h->def_regular | |
3038 | || !h->ref_regular | |
3039 | || !h->forced_local | |
3040 | || h->root.type != bfd_link_hash_defined) | |
3041 | abort (); | |
3042 | ||
351f65ca | 3043 | return elf_x86_64_allocate_dynrelocs (h, inf); |
c25bc9fc L |
3044 | } |
3045 | ||
c175a657 | 3046 | /* Convert load via the GOT slot to load immediate. */ |
daa67607 L |
3047 | |
3048 | static bfd_boolean | |
56ceb5b5 L |
3049 | elf_x86_64_convert_load (bfd *abfd, asection *sec, |
3050 | struct bfd_link_info *link_info) | |
daa67607 L |
3051 | { |
3052 | Elf_Internal_Shdr *symtab_hdr; | |
3053 | Elf_Internal_Rela *internal_relocs; | |
3054 | Elf_Internal_Rela *irel, *irelend; | |
3055 | bfd_byte *contents; | |
0afcef53 | 3056 | struct elf_x86_link_hash_table *htab; |
c175a657 | 3057 | bfd_boolean changed; |
daa67607 L |
3058 | bfd_signed_vma *local_got_refcounts; |
3059 | ||
3060 | /* Don't even try to convert non-ELF outputs. */ | |
3061 | if (!is_elf_hash_table (link_info->hash)) | |
3062 | return FALSE; | |
3063 | ||
c1d11331 | 3064 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 3065 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
56ceb5b5 | 3066 | || sec->need_convert_load == 0 |
c8831961 | 3067 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
3068 | return TRUE; |
3069 | ||
3070 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3071 | ||
3072 | /* Load the relocations for this section. */ | |
3073 | internal_relocs = (_bfd_elf_link_read_relocs | |
3074 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
3075 | link_info->keep_memory)); | |
3076 | if (internal_relocs == NULL) | |
3077 | return FALSE; | |
3078 | ||
c175a657 | 3079 | changed = FALSE; |
0afcef53 | 3080 | htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA); |
daa67607 L |
3081 | local_got_refcounts = elf_local_got_refcounts (abfd); |
3082 | ||
3083 | /* Get the section contents. */ | |
3084 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
3085 | contents = elf_section_data (sec)->this_hdr.contents; | |
3086 | else | |
3087 | { | |
3088 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
3089 | goto error_return; | |
3090 | } | |
3091 | ||
3092 | irelend = internal_relocs + sec->reloc_count; | |
3093 | for (irel = internal_relocs; irel < irelend; irel++) | |
3094 | { | |
3095 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
c175a657 | 3096 | unsigned int r_symndx; |
daa67607 | 3097 | struct elf_link_hash_entry *h; |
c175a657 | 3098 | bfd_boolean converted; |
59cab532 | 3099 | |
c175a657 L |
3100 | if (r_type != R_X86_64_GOTPCRELX |
3101 | && r_type != R_X86_64_REX_GOTPCRELX | |
3102 | && r_type != R_X86_64_GOTPCREL) | |
dfc87947 L |
3103 | continue; |
3104 | ||
c175a657 | 3105 | r_symndx = htab->r_sym (irel->r_info); |
daa67607 | 3106 | if (r_symndx < symtab_hdr->sh_info) |
0afcef53 L |
3107 | h = _bfd_elf_x86_get_local_sym_hash (htab, sec->owner, |
3108 | (const Elf_Internal_Rela *) irel, | |
3109 | FALSE); | |
59cab532 L |
3110 | else |
3111 | { | |
c175a657 | 3112 | h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info]; |
59cab532 L |
3113 | while (h->root.type == bfd_link_hash_indirect |
3114 | || h->root.type == bfd_link_hash_warning) | |
3115 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
59cab532 L |
3116 | } |
3117 | ||
c175a657 L |
3118 | /* STT_GNU_IFUNC must keep GOTPCREL relocations. */ |
3119 | if (h != NULL && h->type == STT_GNU_IFUNC) | |
3120 | continue; | |
daa67607 | 3121 | |
c175a657 L |
3122 | converted = FALSE; |
3123 | if (!elf_x86_64_convert_load_reloc (abfd, sec, contents, irel, h, | |
3124 | &converted, link_info)) | |
3125 | goto error_return; | |
56ceb5b5 | 3126 | |
c175a657 | 3127 | if (converted) |
56ceb5b5 | 3128 | { |
c175a657 L |
3129 | changed = converted; |
3130 | if (h) | |
56ceb5b5 | 3131 | { |
c175a657 L |
3132 | if (h->got.refcount > 0) |
3133 | h->got.refcount -= 1; | |
56ceb5b5 L |
3134 | } |
3135 | else | |
3136 | { | |
c175a657 L |
3137 | if (local_got_refcounts != NULL |
3138 | && local_got_refcounts[r_symndx] > 0) | |
3139 | local_got_refcounts[r_symndx] -= 1; | |
56ceb5b5 | 3140 | } |
daa67607 L |
3141 | } |
3142 | } | |
3143 | ||
3144 | if (contents != NULL | |
3145 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3146 | { | |
c175a657 | 3147 | if (!changed && !link_info->keep_memory) |
daa67607 L |
3148 | free (contents); |
3149 | else | |
3150 | { | |
3151 | /* Cache the section contents for elf_link_input_bfd. */ | |
3152 | elf_section_data (sec)->this_hdr.contents = contents; | |
3153 | } | |
3154 | } | |
3155 | ||
3156 | if (elf_section_data (sec)->relocs != internal_relocs) | |
3157 | { | |
c175a657 | 3158 | if (!changed) |
daa67607 L |
3159 | free (internal_relocs); |
3160 | else | |
3161 | elf_section_data (sec)->relocs = internal_relocs; | |
3162 | } | |
3163 | ||
3164 | return TRUE; | |
3165 | ||
3166 | error_return: | |
3167 | if (contents != NULL | |
3168 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3169 | free (contents); | |
3170 | if (internal_relocs != NULL | |
3171 | && elf_section_data (sec)->relocs != internal_relocs) | |
3172 | free (internal_relocs); | |
3173 | return FALSE; | |
3174 | } | |
3175 | ||
70256ad8 AJ |
3176 | /* Set the sizes of the dynamic sections. */ |
3177 | ||
b34976b6 | 3178 | static bfd_boolean |
351f65ca L |
3179 | elf_x86_64_size_dynamic_sections (bfd *output_bfd, |
3180 | struct bfd_link_info *info) | |
70256ad8 | 3181 | { |
0afcef53 | 3182 | struct elf_x86_link_hash_table *htab; |
70256ad8 AJ |
3183 | bfd *dynobj; |
3184 | asection *s; | |
b34976b6 | 3185 | bfd_boolean relocs; |
c434dee6 | 3186 | bfd *ibfd; |
351f65ca | 3187 | const struct elf_backend_data *bed; |
70256ad8 | 3188 | |
0afcef53 | 3189 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
3190 | if (htab == NULL) |
3191 | return FALSE; | |
351f65ca | 3192 | bed = get_elf_backend_data (output_bfd); |
4dfe6ac6 | 3193 | |
c434dee6 AJ |
3194 | dynobj = htab->elf.dynobj; |
3195 | if (dynobj == NULL) | |
3196 | abort (); | |
70256ad8 | 3197 | |
c434dee6 AJ |
3198 | /* Set up .got offsets for local syms, and space for local dynamic |
3199 | relocs. */ | |
c72f2fb2 | 3200 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
70256ad8 | 3201 | { |
c434dee6 AJ |
3202 | bfd_signed_vma *local_got; |
3203 | bfd_signed_vma *end_local_got; | |
bffbf940 | 3204 | char *local_tls_type; |
67a4f2b7 | 3205 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
3206 | bfd_size_type locsymcount; |
3207 | Elf_Internal_Shdr *symtab_hdr; | |
3208 | asection *srel; | |
70256ad8 | 3209 | |
0ffa91dd | 3210 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
3211 | continue; |
3212 | ||
c434dee6 | 3213 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 3214 | { |
e03a8ed8 | 3215 | struct elf_dyn_relocs *p; |
c434dee6 | 3216 | |
56ceb5b5 | 3217 | if (!elf_x86_64_convert_load (ibfd, s, info)) |
daa67607 L |
3218 | return FALSE; |
3219 | ||
e03a8ed8 | 3220 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 3221 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
3222 | p != NULL; |
3223 | p = p->next) | |
70256ad8 | 3224 | { |
c434dee6 AJ |
3225 | if (!bfd_is_abs_section (p->sec) |
3226 | && bfd_is_abs_section (p->sec->output_section)) | |
3227 | { | |
3228 | /* Input section has been discarded, either because | |
3229 | it is a copy of a linkonce section or due to | |
3230 | linker script /DISCARD/, so we'll be discarding | |
3231 | the relocs too. */ | |
3232 | } | |
3233 | else if (p->count != 0) | |
3234 | { | |
3235 | srel = elf_section_data (p->sec)->sreloc; | |
351f65ca | 3236 | srel->size += p->count * bed->s->sizeof_rela; |
4b819e1f L |
3237 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
3238 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
3239 | { |
3240 | info->flags |= DF_TEXTREL; | |
0e1862bb | 3241 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd | 3242 | || info->error_textrel) |
695344c0 | 3243 | /* xgettext:c-format */ |
1952c5cd | 3244 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), |
b70321a2 | 3245 | p->sec->owner, p->sec); |
b70321a2 | 3246 | } |
c434dee6 | 3247 | } |
70256ad8 AJ |
3248 | } |
3249 | } | |
c434dee6 AJ |
3250 | |
3251 | local_got = elf_local_got_refcounts (ibfd); | |
3252 | if (!local_got) | |
3253 | continue; | |
3254 | ||
0ffa91dd | 3255 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
3256 | locsymcount = symtab_hdr->sh_info; |
3257 | end_local_got = local_got + locsymcount; | |
0afcef53 L |
3258 | local_tls_type = elf_x86_local_got_tls_type (ibfd); |
3259 | local_tlsdesc_gotent = elf_x86_local_tlsdesc_gotent (ibfd); | |
6de2ae4a L |
3260 | s = htab->elf.sgot; |
3261 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
3262 | for (; local_got < end_local_got; |
3263 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 3264 | { |
67a4f2b7 | 3265 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 3266 | if (*local_got > 0) |
70256ad8 | 3267 | { |
67a4f2b7 AO |
3268 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
3269 | { | |
6de2ae4a | 3270 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
351f65ca | 3271 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 3272 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
3273 | *local_got = (bfd_vma) -2; |
3274 | } | |
3275 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3276 | || GOT_TLS_GD_P (*local_tls_type)) | |
3277 | { | |
3278 | *local_got = s->size; | |
3279 | s->size += GOT_ENTRY_SIZE; | |
3280 | if (GOT_TLS_GD_P (*local_tls_type)) | |
3281 | s->size += GOT_ENTRY_SIZE; | |
3282 | } | |
0e1862bb | 3283 | if (bfd_link_pic (info) |
67a4f2b7 | 3284 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 3285 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
3286 | { |
3287 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
3288 | { | |
6de2ae4a | 3289 | htab->elf.srelplt->size |
351f65ca | 3290 | += bed->s->sizeof_rela; |
67a4f2b7 AO |
3291 | htab->tlsdesc_plt = (bfd_vma) -1; |
3292 | } | |
3293 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3294 | || GOT_TLS_GD_P (*local_tls_type)) | |
351f65ca | 3295 | srel->size += bed->s->sizeof_rela; |
67a4f2b7 | 3296 | } |
70256ad8 AJ |
3297 | } |
3298 | else | |
c434dee6 AJ |
3299 | *local_got = (bfd_vma) -1; |
3300 | } | |
3301 | } | |
70256ad8 | 3302 | |
0afcef53 | 3303 | if (htab->tls_ld_or_ldm_got.refcount > 0) |
bffbf940 JJ |
3304 | { |
3305 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
3306 | relocs. */ | |
0afcef53 | 3307 | htab->tls_ld_or_ldm_got.offset = htab->elf.sgot->size; |
6de2ae4a | 3308 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; |
351f65ca | 3309 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
bffbf940 JJ |
3310 | } |
3311 | else | |
0afcef53 | 3312 | htab->tls_ld_or_ldm_got.offset = -1; |
bffbf940 | 3313 | |
c434dee6 AJ |
3314 | /* Allocate global sym .plt and .got entries, and space for global |
3315 | sym dynamic relocs. */ | |
351f65ca | 3316 | elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs, |
eb4ff4d6 | 3317 | info); |
c434dee6 | 3318 | |
c25bc9fc L |
3319 | /* Allocate .plt and .got entries, and space for local symbols. */ |
3320 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 3321 | elf_x86_64_allocate_local_dynrelocs, |
c25bc9fc L |
3322 | info); |
3323 | ||
67a4f2b7 AO |
3324 | /* For every jump slot reserved in the sgotplt, reloc_count is |
3325 | incremented. However, when we reserve space for TLS descriptors, | |
3326 | it's not incremented, so in order to compute the space reserved | |
3327 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 L |
3328 | slot size. |
3329 | ||
3330 | PR ld/13302: We start next_irelative_index at the end of .rela.plt | |
3331 | so that R_X86_64_IRELATIVE entries come last. */ | |
6de2ae4a | 3332 | if (htab->elf.srelplt) |
e1f98742 L |
3333 | { |
3334 | htab->sgotplt_jump_table_size | |
3335 | = elf_x86_64_compute_jump_table_size (htab); | |
3336 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
3337 | } | |
3338 | else if (htab->elf.irelplt) | |
3339 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
67a4f2b7 AO |
3340 | |
3341 | if (htab->tlsdesc_plt) | |
3342 | { | |
3343 | /* If we're not using lazy TLS relocations, don't generate the | |
3344 | PLT and GOT entries they require. */ | |
3345 | if ((info->flags & DF_BIND_NOW)) | |
3346 | htab->tlsdesc_plt = 0; | |
3347 | else | |
3348 | { | |
6de2ae4a L |
3349 | htab->tlsdesc_got = htab->elf.sgot->size; |
3350 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
3351 | /* Reserve room for the initial entry. |
3352 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a | 3353 | if (htab->elf.splt->size == 0) |
765e526c | 3354 | htab->elf.splt->size = htab->plt.plt_entry_size; |
6de2ae4a | 3355 | htab->tlsdesc_plt = htab->elf.splt->size; |
765e526c | 3356 | htab->elf.splt->size += htab->plt.plt_entry_size; |
67a4f2b7 AO |
3357 | } |
3358 | } | |
3359 | ||
a7b16ceb L |
3360 | if (htab->elf.sgotplt) |
3361 | { | |
3362 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
eed180f8 | 3363 | entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
3364 | if ((htab->elf.hgot == NULL |
3365 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
3366 | && (htab->elf.sgotplt->size |
3367 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
3368 | && (htab->elf.splt == NULL |
3369 | || htab->elf.splt->size == 0) | |
3370 | && (htab->elf.sgot == NULL | |
3371 | || htab->elf.sgot->size == 0) | |
3372 | && (htab->elf.iplt == NULL | |
3373 | || htab->elf.iplt->size == 0) | |
3374 | && (htab->elf.igotplt == NULL | |
3375 | || htab->elf.igotplt->size == 0)) | |
3376 | htab->elf.sgotplt->size = 0; | |
3377 | } | |
3378 | ||
fff53dae | 3379 | if (_bfd_elf_eh_frame_present (info)) |
9a2a56cc | 3380 | { |
fff53dae L |
3381 | if (htab->plt_eh_frame != NULL |
3382 | && htab->elf.splt != NULL | |
3383 | && htab->elf.splt->size != 0 | |
3384 | && !bfd_is_abs_section (htab->elf.splt->output_section)) | |
765e526c | 3385 | htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size; |
fff53dae L |
3386 | |
3387 | if (htab->plt_got_eh_frame != NULL | |
3388 | && htab->plt_got != NULL | |
3389 | && htab->plt_got->size != 0 | |
3390 | && !bfd_is_abs_section (htab->plt_got->output_section)) | |
38b12349 | 3391 | htab->plt_got_eh_frame->size |
765e526c | 3392 | = htab->non_lazy_plt->eh_frame_plt_size; |
8361ed4d | 3393 | |
f2c29a16 | 3394 | /* Unwind info for the second PLT and .plt.got sections are |
8361ed4d | 3395 | identical. */ |
f2c29a16 L |
3396 | if (htab->plt_second_eh_frame != NULL |
3397 | && htab->plt_second != NULL | |
3398 | && htab->plt_second->size != 0 | |
3399 | && !bfd_is_abs_section (htab->plt_second->output_section)) | |
3400 | htab->plt_second_eh_frame->size | |
765e526c | 3401 | = htab->non_lazy_plt->eh_frame_plt_size; |
9a2a56cc AM |
3402 | } |
3403 | ||
c434dee6 AJ |
3404 | /* We now have determined the sizes of the various dynamic sections. |
3405 | Allocate memory for them. */ | |
b34976b6 | 3406 | relocs = FALSE; |
c434dee6 AJ |
3407 | for (s = dynobj->sections; s != NULL; s = s->next) |
3408 | { | |
3409 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3410 | continue; | |
3411 | ||
6de2ae4a L |
3412 | if (s == htab->elf.splt |
3413 | || s == htab->elf.sgot | |
3414 | || s == htab->elf.sgotplt | |
3415 | || s == htab->elf.iplt | |
3416 | || s == htab->elf.igotplt | |
f2c29a16 | 3417 | || s == htab->plt_second |
dd7e64d4 | 3418 | || s == htab->plt_got |
9a2a56cc | 3419 | || s == htab->plt_eh_frame |
fff53dae | 3420 | || s == htab->plt_got_eh_frame |
f2c29a16 | 3421 | || s == htab->plt_second_eh_frame |
5474d94f AM |
3422 | || s == htab->elf.sdynbss |
3423 | || s == htab->elf.sdynrelro) | |
c434dee6 AJ |
3424 | { |
3425 | /* Strip this section if we don't need it; see the | |
3426 | comment below. */ | |
3427 | } | |
0112cd26 | 3428 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 3429 | { |
6de2ae4a | 3430 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 3431 | relocs = TRUE; |
c434dee6 AJ |
3432 | |
3433 | /* We use the reloc_count field as a counter if we need | |
3434 | to copy relocs into the output file. */ | |
6de2ae4a | 3435 | if (s != htab->elf.srelplt) |
67a4f2b7 | 3436 | s->reloc_count = 0; |
70256ad8 | 3437 | } |
c434dee6 | 3438 | else |
70256ad8 AJ |
3439 | { |
3440 | /* It's not one of our sections, so don't allocate space. */ | |
3441 | continue; | |
3442 | } | |
3443 | ||
eea6121a | 3444 | if (s->size == 0) |
70256ad8 | 3445 | { |
c434dee6 AJ |
3446 | /* If we don't need this section, strip it from the |
3447 | output file. This is mostly to handle .rela.bss and | |
3448 | .rela.plt. We must create both sections in | |
3449 | create_dynamic_sections, because they must be created | |
3450 | before the linker maps input sections to output | |
3451 | sections. The linker does that before | |
3452 | adjust_dynamic_symbol is called, and it is that | |
3453 | function which decides whether anything needs to go | |
3454 | into these sections. */ | |
3455 | ||
8423293d | 3456 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
3457 | continue; |
3458 | } | |
3459 | ||
c456f082 AM |
3460 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3461 | continue; | |
3462 | ||
70256ad8 AJ |
3463 | /* Allocate memory for the section contents. We use bfd_zalloc |
3464 | here in case unused entries are not reclaimed before the | |
3465 | section's contents are written out. This should not happen, | |
3466 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
3467 | of garbage. */ | |
eea6121a | 3468 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 3469 | if (s->contents == NULL) |
b34976b6 | 3470 | return FALSE; |
70256ad8 AJ |
3471 | } |
3472 | ||
e41b3a13 | 3473 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3474 | && htab->plt_eh_frame->contents != NULL) |
3475 | { | |
9a2a56cc | 3476 | memcpy (htab->plt_eh_frame->contents, |
765e526c | 3477 | htab->plt.eh_frame_plt, htab->plt_eh_frame->size); |
9a2a56cc AM |
3478 | bfd_put_32 (dynobj, htab->elf.splt->size, |
3479 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
3480 | } | |
e41b3a13 | 3481 | |
fff53dae L |
3482 | if (htab->plt_got_eh_frame != NULL |
3483 | && htab->plt_got_eh_frame->contents != NULL) | |
3484 | { | |
fff53dae | 3485 | memcpy (htab->plt_got_eh_frame->contents, |
765e526c | 3486 | htab->non_lazy_plt->eh_frame_plt, |
fff53dae L |
3487 | htab->plt_got_eh_frame->size); |
3488 | bfd_put_32 (dynobj, htab->plt_got->size, | |
3489 | (htab->plt_got_eh_frame->contents | |
3490 | + PLT_FDE_LEN_OFFSET)); | |
3491 | } | |
3492 | ||
f2c29a16 L |
3493 | if (htab->plt_second_eh_frame != NULL |
3494 | && htab->plt_second_eh_frame->contents != NULL) | |
8361ed4d | 3495 | { |
f2c29a16 | 3496 | memcpy (htab->plt_second_eh_frame->contents, |
765e526c | 3497 | htab->non_lazy_plt->eh_frame_plt, |
f2c29a16 L |
3498 | htab->plt_second_eh_frame->size); |
3499 | bfd_put_32 (dynobj, htab->plt_second->size, | |
3500 | (htab->plt_second_eh_frame->contents | |
8361ed4d L |
3501 | + PLT_FDE_LEN_OFFSET)); |
3502 | } | |
3503 | ||
c434dee6 | 3504 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
3505 | { |
3506 | /* Add some entries to the .dynamic section. We fill in the | |
351f65ca | 3507 | values later, in elf_x86_64_finish_dynamic_sections, but we |
70256ad8 | 3508 | must add the entries now so that we get the correct size for |
407443a3 | 3509 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 3510 | dynamic linker and used by the debugger. */ |
dc810e39 | 3511 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3512 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3513 | |
0e1862bb | 3514 | if (bfd_link_executable (info)) |
70256ad8 | 3515 | { |
dc810e39 | 3516 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3517 | return FALSE; |
70256ad8 AJ |
3518 | } |
3519 | ||
6de2ae4a | 3520 | if (htab->elf.splt->size != 0) |
70256ad8 | 3521 | { |
7c1e8d3e L |
3522 | /* DT_PLTGOT is used by prelink even if there is no PLT |
3523 | relocation. */ | |
3524 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
b34976b6 | 3525 | return FALSE; |
97d343d4 | 3526 | } |
67a4f2b7 | 3527 | |
97d343d4 L |
3528 | if (htab->elf.srelplt->size != 0) |
3529 | { | |
3530 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
3531 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
3532 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
67a4f2b7 | 3533 | return FALSE; |
70256ad8 AJ |
3534 | } |
3535 | ||
97d343d4 L |
3536 | if (htab->tlsdesc_plt |
3537 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
3538 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
3539 | return FALSE; | |
3540 | ||
70256ad8 AJ |
3541 | if (relocs) |
3542 | { | |
dc810e39 AM |
3543 | if (!add_dynamic_entry (DT_RELA, 0) |
3544 | || !add_dynamic_entry (DT_RELASZ, 0) | |
351f65ca | 3545 | || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela)) |
b34976b6 | 3546 | return FALSE; |
70256ad8 | 3547 | |
c434dee6 AJ |
3548 | /* If any dynamic relocs apply to a read-only section, |
3549 | then we need a DT_TEXTREL entry. */ | |
3550 | if ((info->flags & DF_TEXTREL) == 0) | |
eed180f8 | 3551 | elf_link_hash_traverse (&htab->elf, |
0afcef53 | 3552 | _bfd_x86_elf_readonly_dynrelocs, |
eb4ff4d6 | 3553 | info); |
c434dee6 AJ |
3554 | |
3555 | if ((info->flags & DF_TEXTREL) != 0) | |
3556 | { | |
2df3368d | 3557 | if (htab->readonly_dynrelocs_against_ifunc) |
8efa2874 L |
3558 | { |
3559 | info->callbacks->einfo | |
3560 | (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n")); | |
3561 | bfd_set_error (bfd_error_bad_value); | |
3562 | return FALSE; | |
3563 | } | |
3564 | ||
c434dee6 | 3565 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 3566 | return FALSE; |
c434dee6 | 3567 | } |
70256ad8 AJ |
3568 | } |
3569 | } | |
dc810e39 | 3570 | #undef add_dynamic_entry |
70256ad8 | 3571 | |
b34976b6 | 3572 | return TRUE; |
70256ad8 AJ |
3573 | } |
3574 | ||
bffbf940 JJ |
3575 | /* Return the relocation value for @tpoff relocation |
3576 | if STT_TLS virtual address is ADDRESS. */ | |
3577 | ||
3578 | static bfd_vma | |
351f65ca | 3579 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 3580 | { |
e1918d23 | 3581 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3582 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3583 | bfd_vma static_tls_size; | |
bffbf940 JJ |
3584 | |
3585 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 3586 | if (htab->tls_sec == NULL) |
bffbf940 | 3587 | return 0; |
7dc98aea RO |
3588 | |
3589 | /* Consider special static TLS alignment requirements. */ | |
3590 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3591 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
3592 | } |
3593 | ||
90f487df L |
3594 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
3595 | branch? */ | |
3596 | ||
3597 | static bfd_boolean | |
3598 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
3599 | { | |
3600 | /* Opcode Instruction | |
3601 | 0xe8 call | |
3602 | 0xe9 jump | |
3603 | 0x0f 0x8x conditional jump */ | |
3604 | return ((offset > 0 | |
3605 | && (contents [offset - 1] == 0xe8 | |
3606 | || contents [offset - 1] == 0xe9)) | |
3607 | || (offset > 1 | |
3608 | && contents [offset - 2] == 0x0f | |
3609 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
3610 | } | |
3611 | ||
8d88c4ca NC |
3612 | /* Relocate an x86_64 ELF section. */ |
3613 | ||
b34976b6 | 3614 | static bfd_boolean |
351f65ca L |
3615 | elf_x86_64_relocate_section (bfd *output_bfd, |
3616 | struct bfd_link_info *info, | |
3617 | bfd *input_bfd, | |
3618 | asection *input_section, | |
3619 | bfd_byte *contents, | |
3620 | Elf_Internal_Rela *relocs, | |
3621 | Elf_Internal_Sym *local_syms, | |
3622 | asection **local_sections) | |
8d88c4ca | 3623 | { |
0afcef53 | 3624 | struct elf_x86_link_hash_table *htab; |
8d88c4ca NC |
3625 | Elf_Internal_Shdr *symtab_hdr; |
3626 | struct elf_link_hash_entry **sym_hashes; | |
3627 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3628 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 3629 | Elf_Internal_Rela *rel; |
60f2e42e | 3630 | Elf_Internal_Rela *wrel; |
8d88c4ca | 3631 | Elf_Internal_Rela *relend; |
38b12349 | 3632 | unsigned int plt_entry_size; |
8d88c4ca | 3633 | |
0ffa91dd NC |
3634 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
3635 | ||
338c190a L |
3636 | /* Skip if check_relocs failed. */ |
3637 | if (input_section->check_relocs_failed) | |
3638 | return FALSE; | |
3639 | ||
0afcef53 | 3640 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
3641 | if (htab == NULL) |
3642 | return FALSE; | |
765e526c | 3643 | plt_entry_size = htab->plt.plt_entry_size; |
0ffa91dd | 3644 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
3645 | sym_hashes = elf_sym_hashes (input_bfd); |
3646 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
0afcef53 | 3647 | local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 3648 | |
0afcef53 | 3649 | _bfd_x86_elf_set_tls_module_base (info); |
9f03412a | 3650 | |
60f2e42e | 3651 | rel = wrel = relocs; |
8d88c4ca | 3652 | relend = relocs + input_section->reloc_count; |
60f2e42e | 3653 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 3654 | { |
bffbf940 | 3655 | unsigned int r_type; |
8d88c4ca NC |
3656 | reloc_howto_type *howto; |
3657 | unsigned long r_symndx; | |
3658 | struct elf_link_hash_entry *h; | |
0afcef53 | 3659 | struct elf_x86_link_hash_entry *eh; |
8d88c4ca NC |
3660 | Elf_Internal_Sym *sym; |
3661 | asection *sec; | |
0ff2b86e | 3662 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 3663 | bfd_vma relocation; |
b34976b6 | 3664 | bfd_boolean unresolved_reloc; |
8d88c4ca | 3665 | bfd_reloc_status_type r; |
bffbf940 | 3666 | int tls_type; |
0ff2b86e | 3667 | asection *base_got, *resolved_plt; |
1788fc08 | 3668 | bfd_vma st_size; |
aec6b87e | 3669 | bfd_boolean resolved_to_zero; |
9e9821dd | 3670 | bfd_boolean relative_reloc; |
8d88c4ca | 3671 | |
351f65ca | 3672 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
3673 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
3674 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
3675 | { |
3676 | if (wrel != rel) | |
3677 | *wrel = *rel; | |
3678 | continue; | |
3679 | } | |
8d88c4ca | 3680 | |
9911c0fc | 3681 | if (r_type >= (int) R_X86_64_standard) |
47aeb64c | 3682 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
8d88c4ca | 3683 | |
d7921315 | 3684 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 3685 | || ABI_64_P (output_bfd)) |
d7921315 L |
3686 | howto = x86_64_elf_howto_table + r_type; |
3687 | else | |
3688 | howto = (x86_64_elf_howto_table | |
3689 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 3690 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
3691 | h = NULL; |
3692 | sym = NULL; | |
3693 | sec = NULL; | |
b34976b6 | 3694 | unresolved_reloc = FALSE; |
8d88c4ca | 3695 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
3696 | { |
3697 | sym = local_syms + r_symndx; | |
3698 | sec = local_sections[r_symndx]; | |
c434dee6 | 3699 | |
c25bc9fc L |
3700 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
3701 | &sec, rel); | |
1788fc08 | 3702 | st_size = sym->st_size; |
c25bc9fc L |
3703 | |
3704 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 3705 | if (!bfd_link_relocatable (info) |
351f65ca | 3706 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 3707 | { |
0afcef53 L |
3708 | h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, |
3709 | rel, FALSE); | |
c25bc9fc L |
3710 | if (h == NULL) |
3711 | abort (); | |
3712 | ||
eed180f8 | 3713 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
3714 | h->root.u.def.value = sym->st_value; |
3715 | h->root.u.def.section = sec; | |
3716 | } | |
8da6118f | 3717 | } |
8d88c4ca | 3718 | else |
8da6118f | 3719 | { |
c9736ba0 | 3720 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 3721 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
c434dee6 | 3722 | |
b2a8e766 AM |
3723 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3724 | r_symndx, symtab_hdr, sym_hashes, | |
3725 | h, sec, relocation, | |
62d887d4 | 3726 | unresolved_reloc, warned, ignored); |
1788fc08 | 3727 | st_size = h->size; |
8da6118f | 3728 | } |
ab96bf03 | 3729 | |
dbaa2011 | 3730 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
3731 | { |
3732 | _bfd_clear_contents (howto, input_bfd, input_section, | |
3733 | contents + rel->r_offset); | |
3734 | wrel->r_offset = rel->r_offset; | |
3735 | wrel->r_info = 0; | |
3736 | wrel->r_addend = 0; | |
3737 | ||
3738 | /* For ld -r, remove relocations in debug sections against | |
3739 | sections defined in discarded sections. Not done for | |
3740 | eh_frame editing code expects to be present. */ | |
3741 | if (bfd_link_relocatable (info) | |
3742 | && (input_section->flags & SEC_DEBUGGING)) | |
3743 | wrel--; | |
3744 | ||
3745 | continue; | |
3746 | } | |
ab96bf03 | 3747 | |
0e1862bb | 3748 | if (bfd_link_relocatable (info)) |
2d5da473 L |
3749 | { |
3750 | if (wrel != rel) | |
3751 | *wrel = *rel; | |
3752 | continue; | |
3753 | } | |
ab96bf03 | 3754 | |
1788fc08 | 3755 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 3756 | { |
1788fc08 L |
3757 | if (r_type == R_X86_64_64) |
3758 | { | |
3759 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
3760 | zero-extend it to 64bit if addend is zero. */ | |
3761 | r_type = R_X86_64_32; | |
3762 | memset (contents + rel->r_offset + 4, 0, 4); | |
3763 | } | |
3764 | else if (r_type == R_X86_64_SIZE64) | |
3765 | { | |
3766 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
3767 | zero-extend it to 64bit if addend is zero. */ | |
3768 | r_type = R_X86_64_SIZE32; | |
3769 | memset (contents + rel->r_offset + 4, 0, 4); | |
3770 | } | |
64d25c44 L |
3771 | } |
3772 | ||
0afcef53 | 3773 | eh = (struct elf_x86_link_hash_entry *) h; |
0ff2b86e | 3774 | |
cbe950e9 L |
3775 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3776 | it here if it is defined in a non-shared object. */ | |
3777 | if (h != NULL | |
3778 | && h->type == STT_GNU_IFUNC | |
3779 | && h->def_regular) | |
3780 | { | |
cbe950e9 | 3781 | bfd_vma plt_index; |
4c544807 | 3782 | const char *name; |
cbe950e9 | 3783 | |
97dc35c8 L |
3784 | if ((input_section->flags & SEC_ALLOC) == 0) |
3785 | { | |
3786 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
3787 | sections because such sections are not SEC_ALLOC and | |
3788 | thus ld.so will not process them. */ | |
3789 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 3790 | continue; |
97dc35c8 L |
3791 | abort (); |
3792 | } | |
233cc9c1 L |
3793 | |
3794 | switch (r_type) | |
3795 | { | |
3796 | default: | |
3797 | break; | |
3798 | ||
3799 | case R_X86_64_GOTPCREL: | |
3800 | case R_X86_64_GOTPCRELX: | |
3801 | case R_X86_64_REX_GOTPCRELX: | |
3802 | case R_X86_64_GOTPCREL64: | |
3803 | base_got = htab->elf.sgot; | |
3804 | off = h->got.offset; | |
3805 | ||
3806 | if (base_got == NULL) | |
3807 | abort (); | |
3808 | ||
3809 | if (off == (bfd_vma) -1) | |
3810 | { | |
3811 | /* We can't use h->got.offset here to save state, or | |
3812 | even just remember the offset, as finish_dynamic_symbol | |
3813 | would use that as offset into .got. */ | |
3814 | ||
3815 | if (h->plt.offset == (bfd_vma) -1) | |
3816 | abort (); | |
3817 | ||
3818 | if (htab->elf.splt != NULL) | |
3819 | { | |
38b12349 | 3820 | plt_index = (h->plt.offset / plt_entry_size |
765e526c | 3821 | - htab->plt.has_plt0); |
233cc9c1 L |
3822 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
3823 | base_got = htab->elf.sgotplt; | |
3824 | } | |
3825 | else | |
3826 | { | |
3827 | plt_index = h->plt.offset / plt_entry_size; | |
3828 | off = plt_index * GOT_ENTRY_SIZE; | |
3829 | base_got = htab->elf.igotplt; | |
3830 | } | |
3831 | ||
3832 | if (h->dynindx == -1 | |
3833 | || h->forced_local | |
3834 | || info->symbolic) | |
3835 | { | |
3836 | /* This references the local defitionion. We must | |
3837 | initialize this entry in the global offset table. | |
3838 | Since the offset must always be a multiple of 8, | |
3839 | we use the least significant bit to record | |
3840 | whether we have initialized it already. | |
3841 | ||
3842 | When doing a dynamic link, we create a .rela.got | |
3843 | relocation entry to initialize the value. This | |
3844 | is done in the finish_dynamic_symbol routine. */ | |
3845 | if ((off & 1) != 0) | |
3846 | off &= ~1; | |
3847 | else | |
3848 | { | |
3849 | bfd_put_64 (output_bfd, relocation, | |
3850 | base_got->contents + off); | |
3851 | /* Note that this is harmless for the GOTPLT64 | |
3852 | case, as -1 | 1 still is -1. */ | |
3853 | h->got.offset |= 1; | |
3854 | } | |
3855 | } | |
3856 | } | |
3857 | ||
3858 | relocation = (base_got->output_section->vma | |
3859 | + base_got->output_offset + off); | |
3860 | ||
3861 | goto do_relocation; | |
3862 | } | |
3863 | ||
3864 | if (h->plt.offset == (bfd_vma) -1) | |
3865 | { | |
3866 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
3867 | if (r_type == htab->pointer_r_type | |
3868 | && (input_section->flags & SEC_CODE) == 0) | |
3869 | goto do_ifunc_pointer; | |
3870 | goto bad_ifunc_reloc; | |
3871 | } | |
cbe950e9 L |
3872 | |
3873 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
3874 | if (htab->elf.splt != NULL) |
3875 | { | |
f2c29a16 | 3876 | if (htab->plt_second != NULL) |
0ff2b86e | 3877 | { |
f2c29a16 L |
3878 | resolved_plt = htab->plt_second; |
3879 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
3880 | } |
3881 | else | |
3882 | { | |
3883 | resolved_plt = htab->elf.splt; | |
3884 | plt_offset = h->plt.offset; | |
3885 | } | |
3886 | } | |
3887 | else | |
3888 | { | |
3889 | resolved_plt = htab->elf.iplt; | |
3890 | plt_offset = h->plt.offset; | |
3891 | } | |
3892 | ||
3893 | relocation = (resolved_plt->output_section->vma | |
3894 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
3895 | |
3896 | switch (r_type) | |
3897 | { | |
3898 | default: | |
233cc9c1 | 3899 | bad_ifunc_reloc: |
4c544807 L |
3900 | if (h->root.root.string) |
3901 | name = h->root.root.string; | |
3902 | else | |
3903 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
3904 | NULL); | |
4eca0228 | 3905 | _bfd_error_handler |
695344c0 | 3906 | /* xgettext:c-format */ |
cbe950e9 | 3907 | (_("%B: relocation %s against STT_GNU_IFUNC " |
233cc9c1 L |
3908 | "symbol `%s' isn't supported"), input_bfd, |
3909 | howto->name, name); | |
cbe950e9 L |
3910 | bfd_set_error (bfd_error_bad_value); |
3911 | return FALSE; | |
3912 | ||
3913 | case R_X86_64_32S: | |
0e1862bb | 3914 | if (bfd_link_pic (info)) |
cbe950e9 | 3915 | abort (); |
710ab287 L |
3916 | goto do_relocation; |
3917 | ||
248775ba L |
3918 | case R_X86_64_32: |
3919 | if (ABI_64_P (output_bfd)) | |
3920 | goto do_relocation; | |
17672001 | 3921 | /* FALLTHROUGH */ |
eed180f8 | 3922 | case R_X86_64_64: |
233cc9c1 | 3923 | do_ifunc_pointer: |
710ab287 L |
3924 | if (rel->r_addend != 0) |
3925 | { | |
4c544807 L |
3926 | if (h->root.root.string) |
3927 | name = h->root.root.string; | |
3928 | else | |
3929 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3930 | sym, NULL); | |
4eca0228 | 3931 | _bfd_error_handler |
695344c0 | 3932 | /* xgettext:c-format */ |
710ab287 | 3933 | (_("%B: relocation %s against STT_GNU_IFUNC " |
d42c267e | 3934 | "symbol `%s' has non-zero addend: %Ld"), |
ef77d6af | 3935 | input_bfd, howto->name, name, rel->r_addend); |
710ab287 L |
3936 | bfd_set_error (bfd_error_bad_value); |
3937 | return FALSE; | |
3938 | } | |
3939 | ||
3940 | /* Generate dynamic relcoation only when there is a | |
233cc9c1 L |
3941 | non-GOT reference in a shared object or there is no |
3942 | PLT. */ | |
3943 | if ((bfd_link_pic (info) && h->non_got_ref) | |
3944 | || h->plt.offset == (bfd_vma) -1) | |
710ab287 L |
3945 | { |
3946 | Elf_Internal_Rela outrel; | |
710ab287 L |
3947 | asection *sreloc; |
3948 | ||
c25bc9fc L |
3949 | /* Need a dynamic relocation to get the real function |
3950 | address. */ | |
710ab287 L |
3951 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
3952 | info, | |
3953 | input_section, | |
3954 | rel->r_offset); | |
3955 | if (outrel.r_offset == (bfd_vma) -1 | |
3956 | || outrel.r_offset == (bfd_vma) -2) | |
3957 | abort (); | |
3958 | ||
3959 | outrel.r_offset += (input_section->output_section->vma | |
3960 | + input_section->output_offset); | |
3961 | ||
3962 | if (h->dynindx == -1 | |
44c4ea11 | 3963 | || h->forced_local |
0e1862bb | 3964 | || bfd_link_executable (info)) |
710ab287 | 3965 | { |
6322e5c5 L |
3966 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
3967 | h->root.root.string, | |
3968 | h->root.u.def.section->owner); | |
3969 | ||
710ab287 | 3970 | /* This symbol is resolved locally. */ |
56b8aada L |
3971 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
3972 | outrel.r_addend = (h->root.u.def.value | |
3973 | + h->root.u.def.section->output_section->vma | |
3974 | + h->root.u.def.section->output_offset); | |
710ab287 L |
3975 | } |
3976 | else | |
3977 | { | |
351f65ca | 3978 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
3979 | outrel.r_addend = 0; |
3980 | } | |
3981 | ||
233cc9c1 L |
3982 | /* Dynamic relocations are stored in |
3983 | 1. .rela.ifunc section in PIC object. | |
3984 | 2. .rela.got section in dynamic executable. | |
3985 | 3. .rela.iplt section in static executable. */ | |
3986 | if (bfd_link_pic (info)) | |
3987 | sreloc = htab->elf.irelifunc; | |
3988 | else if (htab->elf.splt != NULL) | |
3989 | sreloc = htab->elf.srelgot; | |
3990 | else | |
3991 | sreloc = htab->elf.irelplt; | |
351f65ca | 3992 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
3993 | |
3994 | /* If this reloc is against an external symbol, we | |
3995 | do not want to fiddle with the addend. Otherwise, | |
3996 | we need to include the symbol value so that it | |
3997 | becomes an addend for the dynamic reloc. For an | |
3998 | internal symbol, we have updated addend. */ | |
56b8aada | 3999 | continue; |
710ab287 | 4000 | } |
17672001 | 4001 | /* FALLTHROUGH */ |
cbe950e9 | 4002 | case R_X86_64_PC32: |
c3320543 | 4003 | case R_X86_64_PC32_BND: |
cbe950e9 L |
4004 | case R_X86_64_PC64: |
4005 | case R_X86_64_PLT32: | |
c3320543 | 4006 | case R_X86_64_PLT32_BND: |
cbe950e9 | 4007 | goto do_relocation; |
cbe950e9 L |
4008 | } |
4009 | } | |
4010 | ||
aec6b87e | 4011 | resolved_to_zero = (eh != NULL |
e62b9723 | 4012 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
0afcef53 | 4013 | X86_64_ELF_DATA, |
e62b9723 L |
4014 | eh->has_got_reloc, |
4015 | eh)); | |
aec6b87e | 4016 | |
70256ad8 AJ |
4017 | /* When generating a shared object, the relocations handled here are |
4018 | copied into the output file to be resolved at run time. */ | |
4019 | switch (r_type) | |
4020 | { | |
4021 | case R_X86_64_GOT32: | |
7b81dfbb | 4022 | case R_X86_64_GOT64: |
70256ad8 AJ |
4023 | /* Relocation is to the entry for this symbol in the global |
4024 | offset table. */ | |
70256ad8 | 4025 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
4026 | case R_X86_64_GOTPCRELX: |
4027 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
4028 | case R_X86_64_GOTPCREL64: |
4029 | /* Use global offset table entry as symbol value. */ | |
4030 | case R_X86_64_GOTPLT64: | |
de194d85 | 4031 | /* This is obsolete and treated the same as GOT64. */ |
6de2ae4a | 4032 | base_got = htab->elf.sgot; |
7b81dfbb | 4033 | |
6de2ae4a | 4034 | if (htab->elf.sgot == NULL) |
c434dee6 | 4035 | abort (); |
053579d7 | 4036 | |
9e9821dd | 4037 | relative_reloc = FALSE; |
51e0a107 | 4038 | if (h != NULL) |
70256ad8 | 4039 | { |
b34976b6 | 4040 | bfd_boolean dyn; |
c434dee6 AJ |
4041 | |
4042 | off = h->got.offset; | |
7b81dfbb | 4043 | if (h->needs_plt |
eed180f8 | 4044 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
4045 | && off == (bfd_vma)-1) |
4046 | { | |
4047 | /* We can't use h->got.offset here to save | |
4048 | state, or even just remember the offset, as | |
4049 | finish_dynamic_symbol would use that as offset into | |
4050 | .got. */ | |
38b12349 | 4051 | bfd_vma plt_index = (h->plt.offset / plt_entry_size |
765e526c | 4052 | - htab->plt.has_plt0); |
7b81dfbb | 4053 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 4054 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
4055 | } |
4056 | ||
c434dee6 | 4057 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 4058 | |
0e1862bb L |
4059 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
4060 | || (bfd_link_pic (info) | |
27482721 | 4061 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
4062 | || (ELF_ST_VISIBILITY (h->other) |
4063 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
4064 | { |
4065 | /* This is actually a static link, or it is a -Bsymbolic | |
4066 | link and the symbol is defined locally, or the symbol | |
407443a3 | 4067 | was forced to be local because of a version file. We |
51e0a107 JH |
4068 | must initialize this entry in the global offset table. |
4069 | Since the offset must always be a multiple of 8, we | |
4070 | use the least significant bit to record whether we | |
4071 | have initialized it already. | |
4072 | ||
4073 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
4074 | relocation entry to initialize the value. This is |
4075 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
4076 | if ((off & 1) != 0) |
4077 | off &= ~1; | |
4078 | else | |
4079 | { | |
4080 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
4081 | base_got->contents + off); |
4082 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 4083 | as -1 | 1 still is -1. */ |
51e0a107 | 4084 | h->got.offset |= 1; |
9e9821dd L |
4085 | |
4086 | if (h->dynindx == -1 | |
4087 | && !h->forced_local | |
4088 | && h->root.type != bfd_link_hash_undefweak | |
4089 | && bfd_link_pic (info)) | |
4090 | { | |
4091 | /* If this symbol isn't dynamic in PIC, | |
4092 | generate R_X86_64_RELATIVE here. */ | |
4093 | eh->no_finish_dynamic_symbol = 1; | |
4094 | relative_reloc = TRUE; | |
4095 | } | |
51e0a107 JH |
4096 | } |
4097 | } | |
053579d7 | 4098 | else |
b34976b6 | 4099 | unresolved_reloc = FALSE; |
70256ad8 | 4100 | } |
51e0a107 JH |
4101 | else |
4102 | { | |
c434dee6 AJ |
4103 | if (local_got_offsets == NULL) |
4104 | abort (); | |
51e0a107 JH |
4105 | |
4106 | off = local_got_offsets[r_symndx]; | |
4107 | ||
4108 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
4109 | the least significant bit to record whether we have |
4110 | already generated the necessary reloc. */ | |
51e0a107 JH |
4111 | if ((off & 1) != 0) |
4112 | off &= ~1; | |
4113 | else | |
4114 | { | |
c434dee6 | 4115 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 4116 | base_got->contents + off); |
9e9821dd | 4117 | local_got_offsets[r_symndx] |= 1; |
51e0a107 | 4118 | |
0e1862bb | 4119 | if (bfd_link_pic (info)) |
9e9821dd | 4120 | relative_reloc = TRUE; |
51e0a107 | 4121 | } |
51e0a107 | 4122 | } |
6a2bda3f | 4123 | |
9e9821dd L |
4124 | if (relative_reloc) |
4125 | { | |
4126 | asection *s; | |
4127 | Elf_Internal_Rela outrel; | |
4128 | ||
4129 | /* We need to generate a R_X86_64_RELATIVE reloc | |
4130 | for the dynamic linker. */ | |
4131 | s = htab->elf.srelgot; | |
4132 | if (s == NULL) | |
4133 | abort (); | |
4134 | ||
4135 | outrel.r_offset = (base_got->output_section->vma | |
4136 | + base_got->output_offset | |
4137 | + off); | |
4138 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); | |
4139 | outrel.r_addend = relocation; | |
4140 | elf_append_rela (output_bfd, s, &outrel); | |
4141 | } | |
4142 | ||
c434dee6 AJ |
4143 | if (off >= (bfd_vma) -2) |
4144 | abort (); | |
4145 | ||
7b81dfbb AJ |
4146 | relocation = base_got->output_section->vma |
4147 | + base_got->output_offset + off; | |
56ceb5b5 L |
4148 | if (r_type != R_X86_64_GOTPCREL |
4149 | && r_type != R_X86_64_GOTPCRELX | |
4150 | && r_type != R_X86_64_REX_GOTPCRELX | |
4151 | && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
4152 | relocation -= htab->elf.sgotplt->output_section->vma |
4153 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 4154 | |
70256ad8 AJ |
4155 | break; |
4156 | ||
d6ab8113 JB |
4157 | case R_X86_64_GOTOFF64: |
4158 | /* Relocation is relative to the start of the global offset | |
4159 | table. */ | |
4160 | ||
3d949995 L |
4161 | /* Check to make sure it isn't a protected function or data |
4162 | symbol for shared library since it may not be local when | |
e3c0e327 L |
4163 | used as function address or with copy relocation. We also |
4164 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 4165 | if (bfd_link_pic (info) && h) |
d6ab8113 | 4166 | { |
e3c0e327 L |
4167 | if (!h->def_regular) |
4168 | { | |
4169 | const char *v; | |
4170 | ||
4171 | switch (ELF_ST_VISIBILITY (h->other)) | |
4172 | { | |
4173 | case STV_HIDDEN: | |
4174 | v = _("hidden symbol"); | |
4175 | break; | |
4176 | case STV_INTERNAL: | |
4177 | v = _("internal symbol"); | |
4178 | break; | |
4179 | case STV_PROTECTED: | |
4180 | v = _("protected symbol"); | |
4181 | break; | |
4182 | default: | |
4183 | v = _("symbol"); | |
4184 | break; | |
4185 | } | |
4186 | ||
4eca0228 | 4187 | _bfd_error_handler |
695344c0 | 4188 | /* xgettext:c-format */ |
63a5468a AM |
4189 | (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s" |
4190 | " `%s' can not be used when making a shared object"), | |
e3c0e327 L |
4191 | input_bfd, v, h->root.root.string); |
4192 | bfd_set_error (bfd_error_bad_value); | |
4193 | return FALSE; | |
4194 | } | |
0e1862bb | 4195 | else if (!bfd_link_executable (info) |
e3c0e327 L |
4196 | && !SYMBOL_REFERENCES_LOCAL (info, h) |
4197 | && (h->type == STT_FUNC | |
4198 | || h->type == STT_OBJECT) | |
4199 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
4200 | { | |
4eca0228 | 4201 | _bfd_error_handler |
695344c0 | 4202 | /* xgettext:c-format */ |
63a5468a AM |
4203 | (_("%B: relocation R_X86_64_GOTOFF64 against protected %s" |
4204 | " `%s' can not be used when making a shared object"), | |
e3c0e327 L |
4205 | input_bfd, |
4206 | h->type == STT_FUNC ? "function" : "data", | |
4207 | h->root.root.string); | |
4208 | bfd_set_error (bfd_error_bad_value); | |
d6ab8113 | 4209 | return FALSE; |
e3c0e327 | 4210 | } |
d6ab8113 JB |
4211 | } |
4212 | ||
4213 | /* Note that sgot is not involved in this | |
4214 | calculation. We always want the start of .got.plt. If we | |
4215 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
4216 | permitted by the ABI, we might have to change this | |
4217 | calculation. */ | |
6de2ae4a L |
4218 | relocation -= htab->elf.sgotplt->output_section->vma |
4219 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4220 | break; |
4221 | ||
4222 | case R_X86_64_GOTPC32: | |
7b81dfbb | 4223 | case R_X86_64_GOTPC64: |
d6ab8113 | 4224 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
4225 | relocation = htab->elf.sgotplt->output_section->vma |
4226 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4227 | unresolved_reloc = FALSE; |
4228 | break; | |
7b81dfbb AJ |
4229 | |
4230 | case R_X86_64_PLTOFF64: | |
4231 | /* Relocation is PLT entry relative to GOT. For local | |
4232 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 4233 | if (h != NULL |
7b81dfbb | 4234 | /* See PLT32 handling. */ |
9d734efa L |
4235 | && (h->plt.offset != (bfd_vma) -1 |
4236 | || eh->plt_got.offset != (bfd_vma) -1) | |
6de2ae4a | 4237 | && htab->elf.splt != NULL) |
7b81dfbb | 4238 | { |
9d734efa L |
4239 | if (eh->plt_got.offset != (bfd_vma) -1) |
4240 | { | |
4241 | /* Use the GOT PLT. */ | |
4242 | resolved_plt = htab->plt_got; | |
4243 | plt_offset = eh->plt_got.offset; | |
4244 | } | |
f2c29a16 | 4245 | else if (htab->plt_second != NULL) |
0ff2b86e | 4246 | { |
f2c29a16 L |
4247 | resolved_plt = htab->plt_second; |
4248 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
4249 | } |
4250 | else | |
4251 | { | |
4252 | resolved_plt = htab->elf.splt; | |
4253 | plt_offset = h->plt.offset; | |
4254 | } | |
4255 | ||
4256 | relocation = (resolved_plt->output_section->vma | |
4257 | + resolved_plt->output_offset | |
4258 | + plt_offset); | |
7b81dfbb AJ |
4259 | unresolved_reloc = FALSE; |
4260 | } | |
4261 | ||
6de2ae4a L |
4262 | relocation -= htab->elf.sgotplt->output_section->vma |
4263 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 4264 | break; |
d6ab8113 | 4265 | |
70256ad8 | 4266 | case R_X86_64_PLT32: |
c3320543 | 4267 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
4268 | /* Relocation is to the entry for this symbol in the |
4269 | procedure linkage table. */ | |
4270 | ||
4271 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 4272 | without using the procedure linkage table. */ |
70256ad8 AJ |
4273 | if (h == NULL) |
4274 | break; | |
4275 | ||
dd7e64d4 L |
4276 | if ((h->plt.offset == (bfd_vma) -1 |
4277 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 4278 | || htab->elf.splt == NULL) |
70256ad8 AJ |
4279 | { |
4280 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
4281 | happens when statically linking PIC code, or when |
4282 | using -Bsymbolic. */ | |
70256ad8 AJ |
4283 | break; |
4284 | } | |
4285 | ||
dd7e64d4 | 4286 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 4287 | { |
f2c29a16 | 4288 | if (htab->plt_second != NULL) |
dd7e64d4 | 4289 | { |
f2c29a16 L |
4290 | resolved_plt = htab->plt_second; |
4291 | plt_offset = eh->plt_second.offset; | |
dd7e64d4 L |
4292 | } |
4293 | else | |
4294 | { | |
4295 | resolved_plt = htab->elf.splt; | |
4296 | plt_offset = h->plt.offset; | |
4297 | } | |
0ff2b86e L |
4298 | } |
4299 | else | |
4300 | { | |
dd7e64d4 L |
4301 | /* Use the GOT PLT. */ |
4302 | resolved_plt = htab->plt_got; | |
4303 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
4304 | } |
4305 | ||
4306 | relocation = (resolved_plt->output_section->vma | |
4307 | + resolved_plt->output_offset | |
4308 | + plt_offset); | |
b34976b6 | 4309 | unresolved_reloc = FALSE; |
70256ad8 AJ |
4310 | break; |
4311 | ||
1788fc08 L |
4312 | case R_X86_64_SIZE32: |
4313 | case R_X86_64_SIZE64: | |
1788fc08 L |
4314 | /* Set to symbol size. */ |
4315 | relocation = st_size; | |
4316 | goto direct; | |
4317 | ||
fd8ab9e5 AJ |
4318 | case R_X86_64_PC8: |
4319 | case R_X86_64_PC16: | |
4320 | case R_X86_64_PC32: | |
c3320543 | 4321 | case R_X86_64_PC32_BND: |
6333bc0d | 4322 | /* Don't complain about -fPIC if the symbol is undefined when |
7073b5b9 L |
4323 | building executable unless it is unresolved weak symbol or |
4324 | -z nocopyreloc is used. */ | |
aec6b87e | 4325 | if ((input_section->flags & SEC_ALLOC) != 0 |
90f487df | 4326 | && (input_section->flags & SEC_READONLY) != 0 |
6333bc0d | 4327 | && h != NULL |
aec6b87e | 4328 | && ((bfd_link_executable (info) |
7073b5b9 L |
4329 | && ((h->root.type == bfd_link_hash_undefweak |
4330 | && !resolved_to_zero) | |
a5b4ee94 L |
4331 | || ((info->nocopyreloc |
4332 | || (eh->def_protected | |
4333 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
4334 | && h->def_dynamic |
4335 | && !(h->root.u.def.section->flags & SEC_CODE)))) | |
c5bb8910 | 4336 | || bfd_link_dll (info))) |
6610a52d | 4337 | { |
41bed6dd L |
4338 | bfd_boolean fail = FALSE; |
4339 | bfd_boolean branch | |
c3320543 L |
4340 | = ((r_type == R_X86_64_PC32 |
4341 | || r_type == R_X86_64_PC32_BND) | |
41bed6dd L |
4342 | && is_32bit_relative_branch (contents, rel->r_offset)); |
4343 | ||
4344 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
4345 | { | |
4346 | /* Symbol is referenced locally. Make sure it is | |
4347 | defined locally or for a branch. */ | |
8170f769 L |
4348 | fail = (!(h->def_regular || ELF_COMMON_DEF_P (h)) |
4349 | && !branch); | |
41bed6dd | 4350 | } |
aec6b87e | 4351 | else if (!(bfd_link_pie (info) |
bc696fd5 | 4352 | && (h->needs_copy || eh->needs_copy))) |
41bed6dd | 4353 | { |
9a926d55 L |
4354 | /* Symbol doesn't need copy reloc and isn't referenced |
4355 | locally. We only allow branch to symbol with | |
4356 | non-default visibility. */ | |
41bed6dd L |
4357 | fail = (!branch |
4358 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
4359 | } | |
4360 | ||
4361 | if (fail) | |
aab921ad | 4362 | return elf_x86_64_need_pic (info, input_bfd, input_section, |
338c190a | 4363 | h, NULL, NULL, howto); |
6610a52d L |
4364 | } |
4365 | /* Fall through. */ | |
4366 | ||
70256ad8 AJ |
4367 | case R_X86_64_8: |
4368 | case R_X86_64_16: | |
4369 | case R_X86_64_32: | |
d6ab8113 | 4370 | case R_X86_64_PC64: |
6b3db546 | 4371 | case R_X86_64_64: |
80643fbc | 4372 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 4373 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 4374 | |
1788fc08 | 4375 | direct: |
b1e24c02 | 4376 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
4377 | break; |
4378 | ||
9a926d55 | 4379 | /* Don't copy a pc-relative relocation into the output file |
6333bc0d | 4380 | if the symbol needs copy reloc or the symbol is undefined |
04ebc307 | 4381 | when building executable. Copy dynamic function pointer |
aec6b87e L |
4382 | relocations. Don't generate dynamic relocations against |
4383 | resolved undefined weak symbols in PIE. */ | |
0e1862bb | 4384 | if ((bfd_link_pic (info) |
aec6b87e | 4385 | && !(bfd_link_pie (info) |
fd9edc90 | 4386 | && h != NULL |
6333bc0d L |
4387 | && (h->needs_copy |
4388 | || eh->needs_copy | |
4389 | || h->root.type == bfd_link_hash_undefined) | |
d8457a04 L |
4390 | && (IS_X86_64_PCREL_TYPE (r_type) |
4391 | || r_type == R_X86_64_SIZE32 | |
4392 | || r_type == R_X86_64_SIZE64)) | |
4bc6e03a | 4393 | && (h == NULL |
aec6b87e L |
4394 | || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
4395 | && !resolved_to_zero) | |
4396 | || h->root.type != bfd_link_hash_undefweak)) | |
1788fc08 L |
4397 | && ((! IS_X86_64_PCREL_TYPE (r_type) |
4398 | && r_type != R_X86_64_SIZE32 | |
4399 | && r_type != R_X86_64_SIZE64) | |
d8045f23 | 4400 | || ! SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c | 4401 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 4402 | && !bfd_link_pic (info) |
c434dee6 AJ |
4403 | && h != NULL |
4404 | && h->dynindx != -1 | |
aec6b87e L |
4405 | && (!h->non_got_ref |
4406 | || eh->func_pointer_refcount > 0 | |
4407 | || (h->root.type == bfd_link_hash_undefweak | |
4408 | && !resolved_to_zero)) | |
bae420ef L |
4409 | && ((h->def_dynamic && !h->def_regular) |
4410 | /* Undefined weak symbol is bound locally when | |
4411 | PIC is false. */ | |
0f88be7a | 4412 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
4413 | { |
4414 | Elf_Internal_Rela outrel; | |
b34976b6 | 4415 | bfd_boolean skip, relocate; |
c434dee6 | 4416 | asection *sreloc; |
70256ad8 AJ |
4417 | |
4418 | /* When generating a shared object, these relocations | |
4419 | are copied into the output file to be resolved at run | |
407443a3 | 4420 | time. */ |
b34976b6 AM |
4421 | skip = FALSE; |
4422 | relocate = FALSE; | |
70256ad8 | 4423 | |
c629eae0 JJ |
4424 | outrel.r_offset = |
4425 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 4426 | rel->r_offset); |
c629eae0 | 4427 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 4428 | skip = TRUE; |
0fb19cbc | 4429 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 4430 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
4431 | |
4432 | outrel.r_offset += (input_section->output_section->vma | |
4433 | + input_section->output_offset); | |
4434 | ||
4435 | if (skip) | |
0bb2d96a | 4436 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 4437 | |
fd8ab9e5 AJ |
4438 | /* h->dynindx may be -1 if this symbol was marked to |
4439 | become local. */ | |
4440 | else if (h != NULL | |
c434dee6 | 4441 | && h->dynindx != -1 |
d8045f23 | 4442 | && (IS_X86_64_PCREL_TYPE (r_type) |
4e0c91e4 L |
4443 | || !(bfd_link_executable (info) |
4444 | || SYMBOLIC_BIND (info, h)) | |
d8045f23 | 4445 | || ! h->def_regular)) |
70256ad8 | 4446 | { |
351f65ca | 4447 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 4448 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
4449 | } |
4450 | else | |
4451 | { | |
4c10bbaa L |
4452 | /* This symbol is local, or marked to become local. |
4453 | When relocation overflow check is disabled, we | |
4454 | convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
4455 | if (r_type == htab->pointer_r_type | |
4456 | || (r_type == R_X86_64_32 | |
4457 | && info->no_reloc_overflow_check)) | |
607c0e09 | 4458 | { |
b34976b6 | 4459 | relocate = TRUE; |
351f65ca | 4460 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
4461 | outrel.r_addend = relocation + rel->r_addend; |
4462 | } | |
64d25c44 L |
4463 | else if (r_type == R_X86_64_64 |
4464 | && !ABI_64_P (output_bfd)) | |
4465 | { | |
4466 | relocate = TRUE; | |
4467 | outrel.r_info = htab->r_info (0, | |
4468 | R_X86_64_RELATIVE64); | |
4469 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
4470 | /* Check addend overflow. */ |
4471 | if ((outrel.r_addend & 0x80000000) | |
4472 | != (rel->r_addend & 0x80000000)) | |
4473 | { | |
4474 | const char *name; | |
268a8d3a | 4475 | int addend = rel->r_addend; |
8cf0d2dd L |
4476 | if (h && h->root.root.string) |
4477 | name = h->root.root.string; | |
4478 | else | |
4479 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
4480 | sym, NULL); | |
d42c267e AM |
4481 | _bfd_error_handler |
4482 | /* xgettext:c-format */ | |
4483 | (_("%B: addend %s%#x in relocation %s against " | |
4484 | "symbol `%s' at %#Lx in section `%A' is " | |
4485 | "out of range"), | |
4486 | input_bfd, addend < 0 ? "-" : "", addend, | |
4487 | howto->name, name, rel->r_offset, input_section); | |
8cf0d2dd L |
4488 | bfd_set_error (bfd_error_bad_value); |
4489 | return FALSE; | |
4490 | } | |
64d25c44 | 4491 | } |
607c0e09 AS |
4492 | else |
4493 | { | |
4494 | long sindx; | |
4495 | ||
8517fae7 | 4496 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
4497 | sindx = 0; |
4498 | else if (sec == NULL || sec->owner == NULL) | |
4499 | { | |
4500 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 4501 | return FALSE; |
607c0e09 AS |
4502 | } |
4503 | else | |
4504 | { | |
4505 | asection *osec; | |
4506 | ||
74541ad4 AM |
4507 | /* We are turning this relocation into one |
4508 | against a section symbol. It would be | |
4509 | proper to subtract the symbol's value, | |
4510 | osec->vma, from the emitted reloc addend, | |
4511 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
4512 | osec = sec->output_section; |
4513 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
4514 | if (sindx == 0) |
4515 | { | |
4516 | asection *oi = htab->elf.text_index_section; | |
4517 | sindx = elf_section_data (oi)->dynindx; | |
4518 | } | |
4519 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
4520 | } |
4521 | ||
351f65ca | 4522 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
4523 | outrel.r_addend = relocation + rel->r_addend; |
4524 | } | |
70256ad8 AJ |
4525 | } |
4526 | ||
cbe950e9 | 4527 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 4528 | |
62d78908 L |
4529 | if (sreloc == NULL || sreloc->contents == NULL) |
4530 | { | |
4531 | r = bfd_reloc_notsupported; | |
4532 | goto check_relocation_error; | |
4533 | } | |
c434dee6 | 4534 | |
351f65ca | 4535 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
4536 | |
4537 | /* If this reloc is against an external symbol, we do | |
4538 | not want to fiddle with the addend. Otherwise, we | |
4539 | need to include the symbol value so that it becomes | |
4540 | an addend for the dynamic reloc. */ | |
0f88be7a | 4541 | if (! relocate) |
70256ad8 AJ |
4542 | continue; |
4543 | } | |
4544 | ||
4545 | break; | |
4546 | ||
bffbf940 | 4547 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
4548 | case R_X86_64_GOTPC32_TLSDESC: |
4549 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 4550 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
4551 | tls_type = GOT_UNKNOWN; |
4552 | if (h == NULL && local_got_offsets) | |
0afcef53 | 4553 | tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 4554 | else if (h != NULL) |
0afcef53 | 4555 | tls_type = elf_x86_hash_entry (h)->tls_type; |
142411ca | 4556 | |
351f65ca L |
4557 | if (! elf_x86_64_tls_transition (info, input_bfd, |
4558 | input_section, contents, | |
4559 | symtab_hdr, sym_hashes, | |
4560 | &r_type, tls_type, rel, | |
bedfd056 | 4561 | relend, h, r_symndx, TRUE)) |
534a31f6 | 4562 | return FALSE; |
bffbf940 JJ |
4563 | |
4564 | if (r_type == R_X86_64_TPOFF32) | |
4565 | { | |
142411ca L |
4566 | bfd_vma roff = rel->r_offset; |
4567 | ||
bffbf940 | 4568 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 4569 | |
351f65ca | 4570 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 4571 | { |
52bc799a | 4572 | /* GD->LE transition. For 64bit, change |
e2cbcd91 L |
4573 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
4574 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
4575 | or | |
4576 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
4577 | .byte 0x66; rex64 | |
4578 | call *__tls_get_addr@GOTPCREL(%rip) | |
4579 | which may be converted to | |
4580 | addr32 call __tls_get_addr | |
52bc799a | 4581 | into: |
e2cbcd91 L |
4582 | movq %fs:0, %rax |
4583 | leaq foo@tpoff(%rax), %rax | |
52bc799a | 4584 | For 32bit, change |
e2cbcd91 L |
4585 | leaq foo@tlsgd(%rip), %rdi |
4586 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
4587 | or | |
4588 | leaq foo@tlsgd(%rip), %rdi | |
4589 | .byte 0x66; rex64 | |
4590 | call *__tls_get_addr@GOTPCREL(%rip) | |
4591 | which may be converted to | |
4592 | addr32 call __tls_get_addr | |
52bc799a | 4593 | into: |
e2cbcd91 L |
4594 | movl %fs:0, %eax |
4595 | leaq foo@tpoff(%rax), %rax | |
5c98a14e | 4596 | For largepic, change: |
e2cbcd91 L |
4597 | leaq foo@tlsgd(%rip), %rdi |
4598 | movabsq $__tls_get_addr@pltoff, %rax | |
4599 | addq %r15, %rax | |
4600 | call *%rax | |
5c98a14e | 4601 | into: |
e2cbcd91 L |
4602 | movq %fs:0, %rax |
4603 | leaq foo@tpoff(%rax), %rax | |
4604 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 4605 | int largepic = 0; |
e2cbcd91 | 4606 | if (ABI_64_P (output_bfd)) |
5c98a14e | 4607 | { |
e2cbcd91 L |
4608 | if (contents[roff + 5] == 0xb8) |
4609 | { | |
4610 | memcpy (contents + roff - 3, | |
4611 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
4612 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
4613 | largepic = 1; | |
4614 | } | |
4615 | else | |
4616 | memcpy (contents + roff - 4, | |
4617 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
4618 | 16); | |
5c98a14e | 4619 | } |
52bc799a L |
4620 | else |
4621 | memcpy (contents + roff - 3, | |
4622 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
4623 | 15); | |
eb4ff4d6 | 4624 | bfd_put_32 (output_bfd, |
351f65ca | 4625 | elf_x86_64_tpoff (info, relocation), |
5c98a14e | 4626 | contents + roff + 8 + largepic); |
e2cbcd91 L |
4627 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, |
4628 | R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */ | |
bffbf940 | 4629 | rel++; |
60f2e42e | 4630 | wrel++; |
bffbf940 JJ |
4631 | continue; |
4632 | } | |
351f65ca | 4633 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
4634 | { |
4635 | /* GDesc -> LE transition. | |
4636 | It's originally something like: | |
4637 | leaq x@tlsdesc(%rip), %rax | |
4638 | ||
4639 | Change it to: | |
c9736ba0 | 4640 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 4641 | |
c9736ba0 | 4642 | unsigned int val, type; |
67a4f2b7 | 4643 | |
67a4f2b7 | 4644 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 4645 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
4646 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
4647 | contents + roff - 3); | |
4648 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
4649 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4650 | contents + roff - 1); | |
eb4ff4d6 | 4651 | bfd_put_32 (output_bfd, |
351f65ca | 4652 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
4653 | contents + roff); |
4654 | continue; | |
4655 | } | |
351f65ca | 4656 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
4657 | { |
4658 | /* GDesc -> LE transition. | |
4659 | It's originally: | |
4660 | call *(%rax) | |
4661 | Turn it into: | |
142411ca | 4662 | xchg %ax,%ax. */ |
10efb593 | 4663 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
4664 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4665 | continue; | |
4666 | } | |
351f65ca | 4667 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 4668 | { |
bffbf940 | 4669 | /* IE->LE transition: |
cf61b747 | 4670 | For 64bit, originally it can be one of: |
bffbf940 JJ |
4671 | movq foo@gottpoff(%rip), %reg |
4672 | addq foo@gottpoff(%rip), %reg | |
4673 | We change it into: | |
4674 | movq $foo, %reg | |
4675 | leaq foo(%reg), %reg | |
cf61b747 L |
4676 | addq $foo, %reg. |
4677 | For 32bit, originally it can be one of: | |
4678 | movq foo@gottpoff(%rip), %reg | |
4679 | addl foo@gottpoff(%rip), %reg | |
4680 | We change it into: | |
4681 | movq $foo, %reg | |
4682 | leal foo(%reg), %reg | |
4683 | addl $foo, %reg. */ | |
142411ca L |
4684 | |
4685 | unsigned int val, type, reg; | |
4686 | ||
cf61b747 L |
4687 | if (roff >= 3) |
4688 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
4689 | else | |
4690 | val = 0; | |
142411ca L |
4691 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
4692 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 4693 | reg >>= 3; |
bffbf940 JJ |
4694 | if (type == 0x8b) |
4695 | { | |
4696 | /* movq */ | |
4697 | if (val == 0x4c) | |
4698 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 4699 | contents + roff - 3); |
4a4c5f25 L |
4700 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4701 | bfd_put_8 (output_bfd, 0x41, | |
4702 | contents + roff - 3); | |
bffbf940 | 4703 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 4704 | contents + roff - 2); |
bffbf940 | 4705 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 4706 | contents + roff - 1); |
bffbf940 JJ |
4707 | } |
4708 | else if (reg == 4) | |
4709 | { | |
cf61b747 L |
4710 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
4711 | is special */ | |
bffbf940 JJ |
4712 | if (val == 0x4c) |
4713 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 4714 | contents + roff - 3); |
4a4c5f25 L |
4715 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4716 | bfd_put_8 (output_bfd, 0x41, | |
4717 | contents + roff - 3); | |
bffbf940 | 4718 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 4719 | contents + roff - 2); |
bffbf940 | 4720 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 4721 | contents + roff - 1); |
bffbf940 JJ |
4722 | } |
4723 | else | |
4724 | { | |
cf61b747 | 4725 | /* addq/addl -> leaq/leal */ |
bffbf940 JJ |
4726 | if (val == 0x4c) |
4727 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 4728 | contents + roff - 3); |
4a4c5f25 L |
4729 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4730 | bfd_put_8 (output_bfd, 0x45, | |
4731 | contents + roff - 3); | |
bffbf940 | 4732 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 4733 | contents + roff - 2); |
bffbf940 | 4734 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 4735 | contents + roff - 1); |
bffbf940 | 4736 | } |
eb4ff4d6 | 4737 | bfd_put_32 (output_bfd, |
351f65ca | 4738 | elf_x86_64_tpoff (info, relocation), |
142411ca | 4739 | contents + roff); |
bffbf940 JJ |
4740 | continue; |
4741 | } | |
142411ca L |
4742 | else |
4743 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
4744 | } |
4745 | ||
6de2ae4a | 4746 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
4747 | abort (); |
4748 | ||
4749 | if (h != NULL) | |
67a4f2b7 AO |
4750 | { |
4751 | off = h->got.offset; | |
0afcef53 | 4752 | offplt = elf_x86_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 4753 | } |
bffbf940 JJ |
4754 | else |
4755 | { | |
4756 | if (local_got_offsets == NULL) | |
4757 | abort (); | |
4758 | ||
4759 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 4760 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
4761 | } |
4762 | ||
4763 | if ((off & 1) != 0) | |
4764 | off &= ~1; | |
26e41594 | 4765 | else |
bffbf940 JJ |
4766 | { |
4767 | Elf_Internal_Rela outrel; | |
bffbf940 | 4768 | int dr_type, indx; |
67a4f2b7 | 4769 | asection *sreloc; |
bffbf940 | 4770 | |
6de2ae4a | 4771 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
4772 | abort (); |
4773 | ||
67a4f2b7 AO |
4774 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4775 | ||
4776 | if (GOT_TLS_GDESC_P (tls_type)) | |
4777 | { | |
351f65ca | 4778 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 4779 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
4780 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
4781 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4782 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4783 | + offplt |
4784 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4785 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4786 | if (indx == 0) |
0afcef53 | 4787 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
67a4f2b7 AO |
4788 | else |
4789 | outrel.r_addend = 0; | |
351f65ca | 4790 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
4791 | } |
4792 | ||
6de2ae4a | 4793 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4794 | |
6de2ae4a L |
4795 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4796 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 4797 | |
67a4f2b7 | 4798 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 4799 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
4800 | else if (GOT_TLS_GDESC_P (tls_type)) |
4801 | goto dr_done; | |
bffbf940 JJ |
4802 | else |
4803 | dr_type = R_X86_64_TPOFF64; | |
4804 | ||
6de2ae4a | 4805 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 4806 | outrel.r_addend = 0; |
67a4f2b7 AO |
4807 | if ((dr_type == R_X86_64_TPOFF64 |
4808 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
0afcef53 | 4809 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
351f65ca | 4810 | outrel.r_info = htab->r_info (indx, dr_type); |
bffbf940 | 4811 | |
351f65ca | 4812 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 4813 | |
67a4f2b7 | 4814 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
4815 | { |
4816 | if (indx == 0) | |
4817 | { | |
d40d037c | 4818 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 4819 | bfd_put_64 (output_bfd, |
0afcef53 | 4820 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 4821 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
4822 | } |
4823 | else | |
4824 | { | |
4825 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 4826 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 4827 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
4828 | R_X86_64_DTPOFF64); |
4829 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 4830 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 4831 | &outrel); |
bffbf940 JJ |
4832 | } |
4833 | } | |
4834 | ||
67a4f2b7 | 4835 | dr_done: |
bffbf940 JJ |
4836 | if (h != NULL) |
4837 | h->got.offset |= 1; | |
4838 | else | |
4839 | local_got_offsets[r_symndx] |= 1; | |
4840 | } | |
4841 | ||
67a4f2b7 AO |
4842 | if (off >= (bfd_vma) -2 |
4843 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 4844 | abort (); |
351f65ca | 4845 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 4846 | { |
67a4f2b7 AO |
4847 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
4848 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
4849 | relocation = htab->elf.sgotplt->output_section->vma |
4850 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4851 | + offplt + htab->sgotplt_jump_table_size; |
4852 | else | |
6de2ae4a L |
4853 | relocation = htab->elf.sgot->output_section->vma |
4854 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 4855 | unresolved_reloc = FALSE; |
bffbf940 | 4856 | } |
142411ca | 4857 | else |
67a4f2b7 | 4858 | { |
142411ca | 4859 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 4860 | |
351f65ca | 4861 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 4862 | { |
52bc799a | 4863 | /* GD->IE transition. For 64bit, change |
e2cbcd91 L |
4864 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
4865 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
4866 | or | |
4867 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
4868 | .byte 0x66; rex64 | |
4869 | call *__tls_get_addr@GOTPCREL(%rip | |
4870 | which may be converted to | |
4871 | addr32 call __tls_get_addr | |
52bc799a | 4872 | into: |
e2cbcd91 L |
4873 | movq %fs:0, %rax |
4874 | addq foo@gottpoff(%rip), %rax | |
52bc799a | 4875 | For 32bit, change |
e2cbcd91 L |
4876 | leaq foo@tlsgd(%rip), %rdi |
4877 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
4878 | or | |
4879 | leaq foo@tlsgd(%rip), %rdi | |
4880 | .byte 0x66; rex64; | |
4881 | call *__tls_get_addr@GOTPCREL(%rip) | |
4882 | which may be converted to | |
4883 | addr32 call __tls_get_addr | |
52bc799a | 4884 | into: |
e2cbcd91 L |
4885 | movl %fs:0, %eax |
4886 | addq foo@gottpoff(%rip), %rax | |
5c98a14e | 4887 | For largepic, change: |
e2cbcd91 L |
4888 | leaq foo@tlsgd(%rip), %rdi |
4889 | movabsq $__tls_get_addr@pltoff, %rax | |
4890 | addq %r15, %rax | |
4891 | call *%rax | |
5c98a14e | 4892 | into: |
e2cbcd91 L |
4893 | movq %fs:0, %rax |
4894 | addq foo@gottpoff(%rax), %rax | |
4895 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 4896 | int largepic = 0; |
e2cbcd91 | 4897 | if (ABI_64_P (output_bfd)) |
5c98a14e | 4898 | { |
e2cbcd91 L |
4899 | if (contents[roff + 5] == 0xb8) |
4900 | { | |
4901 | memcpy (contents + roff - 3, | |
4902 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
4903 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
4904 | largepic = 1; | |
4905 | } | |
4906 | else | |
4907 | memcpy (contents + roff - 4, | |
4908 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
4909 | 16); | |
5c98a14e | 4910 | } |
52bc799a L |
4911 | else |
4912 | memcpy (contents + roff - 3, | |
4913 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
4914 | 15); | |
142411ca | 4915 | |
6de2ae4a L |
4916 | relocation = (htab->elf.sgot->output_section->vma |
4917 | + htab->elf.sgot->output_offset + off | |
142411ca | 4918 | - roff |
5c98a14e | 4919 | - largepic |
142411ca L |
4920 | - input_section->output_section->vma |
4921 | - input_section->output_offset | |
4922 | - 12); | |
4923 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
4924 | contents + roff + 8 + largepic); |
4925 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 4926 | rel++; |
60f2e42e | 4927 | wrel++; |
142411ca L |
4928 | continue; |
4929 | } | |
351f65ca | 4930 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
4931 | { |
4932 | /* GDesc -> IE transition. | |
4933 | It's originally something like: | |
4934 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 4935 | |
142411ca | 4936 | Change it to: |
c9736ba0 | 4937 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 4938 | |
142411ca L |
4939 | /* Now modify the instruction as appropriate. To |
4940 | turn a leaq into a movq in the form we use it, it | |
4941 | suffices to change the second byte from 0x8d to | |
4942 | 0x8b. */ | |
4943 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
4944 | ||
4945 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4946 | htab->elf.sgot->output_section->vma |
4947 | + htab->elf.sgot->output_offset + off | |
142411ca L |
4948 | - rel->r_offset |
4949 | - input_section->output_section->vma | |
4950 | - input_section->output_offset | |
4951 | - 4, | |
4952 | contents + roff); | |
4953 | continue; | |
4954 | } | |
351f65ca | 4955 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
4956 | { |
4957 | /* GDesc -> IE transition. | |
4958 | It's originally: | |
4959 | call *(%rax) | |
4960 | ||
4961 | Change it to: | |
c9736ba0 | 4962 | xchg %ax, %ax. */ |
142411ca | 4963 | |
142411ca L |
4964 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
4965 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
4966 | continue; | |
4967 | } | |
4968 | else | |
4969 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 4970 | } |
bffbf940 JJ |
4971 | break; |
4972 | ||
4973 | case R_X86_64_TLSLD: | |
351f65ca L |
4974 | if (! elf_x86_64_tls_transition (info, input_bfd, |
4975 | input_section, contents, | |
4976 | symtab_hdr, sym_hashes, | |
bedfd056 L |
4977 | &r_type, GOT_UNKNOWN, rel, |
4978 | relend, h, r_symndx, TRUE)) | |
142411ca | 4979 | return FALSE; |
a3fadc9a | 4980 | |
142411ca L |
4981 | if (r_type != R_X86_64_TLSLD) |
4982 | { | |
bffbf940 | 4983 | /* LD->LE transition: |
e2cbcd91 L |
4984 | leaq foo@tlsld(%rip), %rdi |
4985 | call __tls_get_addr@PLT | |
4986 | For 64bit, we change it into: | |
4987 | .word 0x6666; .byte 0x66; movq %fs:0, %rax | |
4988 | For 32bit, we change it into: | |
4989 | nopl 0x0(%rax); movl %fs:0, %eax | |
4990 | Or | |
4991 | leaq foo@tlsld(%rip), %rdi; | |
4992 | call *__tls_get_addr@GOTPCREL(%rip) | |
4993 | which may be converted to | |
4994 | addr32 call __tls_get_addr | |
52bc799a | 4995 | For 64bit, we change it into: |
e2cbcd91 | 4996 | .word 0x6666; .word 0x6666; movq %fs:0, %rax |
52bc799a | 4997 | For 32bit, we change it into: |
e2cbcd91 | 4998 | nopw 0x0(%rax); movl %fs:0, %eax |
5c98a14e | 4999 | For largepic, change: |
e2cbcd91 L |
5000 | leaq foo@tlsgd(%rip), %rdi |
5001 | movabsq $__tls_get_addr@pltoff, %rax | |
5002 | addq %rbx, %rax | |
5003 | call *%rax | |
5004 | into | |
5005 | data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
5006 | movq %fs:0, %eax */ | |
142411ca L |
5007 | |
5008 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
e2cbcd91 L |
5009 | if (ABI_64_P (output_bfd)) |
5010 | { | |
5011 | if (contents[rel->r_offset + 5] == 0xb8) | |
5012 | memcpy (contents + rel->r_offset - 3, | |
5013 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
5014 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
5015 | else if (contents[rel->r_offset + 4] == 0xff | |
5016 | || contents[rel->r_offset + 4] == 0x67) | |
5017 | memcpy (contents + rel->r_offset - 3, | |
5018 | "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", | |
5019 | 13); | |
5020 | else | |
5021 | memcpy (contents + rel->r_offset - 3, | |
5022 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
5023 | } | |
52bc799a | 5024 | else |
e2cbcd91 L |
5025 | { |
5026 | if (contents[rel->r_offset + 4] == 0xff) | |
5027 | memcpy (contents + rel->r_offset - 3, | |
5028 | "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", | |
5029 | 13); | |
5030 | else | |
5031 | memcpy (contents + rel->r_offset - 3, | |
5032 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
5033 | } | |
5034 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX | |
5035 | and R_X86_64_PLTOFF64. */ | |
bffbf940 | 5036 | rel++; |
60f2e42e | 5037 | wrel++; |
bffbf940 JJ |
5038 | continue; |
5039 | } | |
5040 | ||
6de2ae4a | 5041 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
5042 | abort (); |
5043 | ||
0afcef53 | 5044 | off = htab->tls_ld_or_ldm_got.offset; |
bffbf940 JJ |
5045 | if (off & 1) |
5046 | off &= ~1; | |
5047 | else | |
5048 | { | |
5049 | Elf_Internal_Rela outrel; | |
bffbf940 | 5050 | |
6de2ae4a | 5051 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
5052 | abort (); |
5053 | ||
6de2ae4a L |
5054 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5055 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
5056 | |
5057 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5058 | htab->elf.sgot->contents + off); |
bffbf940 | 5059 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 5060 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5061 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 5062 | outrel.r_addend = 0; |
351f65ca | 5063 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 5064 | &outrel); |
0afcef53 | 5065 | htab->tls_ld_or_ldm_got.offset |= 1; |
bffbf940 | 5066 | } |
6de2ae4a L |
5067 | relocation = htab->elf.sgot->output_section->vma |
5068 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5069 | unresolved_reloc = FALSE; |
bffbf940 JJ |
5070 | break; |
5071 | ||
5072 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
5073 | if (!bfd_link_executable (info) |
5074 | || (input_section->flags & SEC_CODE) == 0) | |
0afcef53 | 5075 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
bffbf940 | 5076 | else |
351f65ca | 5077 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5078 | break; |
5079 | ||
5080 | case R_X86_64_TPOFF32: | |
6769d501 | 5081 | case R_X86_64_TPOFF64: |
0e1862bb | 5082 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 5083 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5084 | break; |
5085 | ||
a69ed7f7 L |
5086 | case R_X86_64_DTPOFF64: |
5087 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
0afcef53 | 5088 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
a69ed7f7 L |
5089 | break; |
5090 | ||
70256ad8 AJ |
5091 | default: |
5092 | break; | |
5093 | } | |
8d88c4ca | 5094 | |
239e1f3a AM |
5095 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
5096 | because such sections are not SEC_ALLOC and thus ld.so will | |
5097 | not process them. */ | |
c434dee6 | 5098 | if (unresolved_reloc |
239e1f3a | 5099 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
5100 | && h->def_dynamic) |
5101 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
5102 | rel->r_offset) != (bfd_vma) -1) | |
a040981f | 5103 | { |
7073b5b9 L |
5104 | switch (r_type) |
5105 | { | |
5106 | case R_X86_64_32S: | |
a5b4ee94 L |
5107 | sec = h->root.u.def.section; |
5108 | if ((info->nocopyreloc | |
5109 | || (eh->def_protected | |
5110 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
5111 | && !(h->root.u.def.section->flags & SEC_CODE)) |
5112 | return elf_x86_64_need_pic (info, input_bfd, input_section, | |
5113 | h, NULL, NULL, howto); | |
5114 | /* Fall through. */ | |
5115 | ||
5116 | default: | |
5117 | _bfd_error_handler | |
5118 | /* xgettext:c-format */ | |
5119 | (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"), | |
5120 | input_bfd, | |
5121 | input_section, | |
5122 | rel->r_offset, | |
5123 | howto->name, | |
5124 | h->root.root.string); | |
5125 | return FALSE; | |
5126 | } | |
a040981f | 5127 | } |
c434dee6 | 5128 | |
cbe950e9 | 5129 | do_relocation: |
8d88c4ca | 5130 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
5131 | contents, rel->r_offset, |
5132 | relocation, rel->r_addend); | |
8d88c4ca | 5133 | |
62d78908 | 5134 | check_relocation_error: |
8d88c4ca | 5135 | if (r != bfd_reloc_ok) |
8da6118f | 5136 | { |
c434dee6 AJ |
5137 | const char *name; |
5138 | ||
5139 | if (h != NULL) | |
5140 | name = h->root.root.string; | |
5141 | else | |
8da6118f | 5142 | { |
c434dee6 AJ |
5143 | name = bfd_elf_string_from_elf_section (input_bfd, |
5144 | symtab_hdr->sh_link, | |
5145 | sym->st_name); | |
5146 | if (name == NULL) | |
b34976b6 | 5147 | return FALSE; |
c434dee6 AJ |
5148 | if (*name == '\0') |
5149 | name = bfd_section_name (input_bfd, sec); | |
5150 | } | |
5151 | ||
5152 | if (r == bfd_reloc_overflow) | |
1a72702b AM |
5153 | (*info->callbacks->reloc_overflow) |
5154 | (info, (h ? &h->root : NULL), name, howto->name, | |
5155 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
c434dee6 AJ |
5156 | else |
5157 | { | |
4eca0228 | 5158 | _bfd_error_handler |
695344c0 | 5159 | /* xgettext:c-format */ |
d42c267e | 5160 | (_("%B(%A+%#Lx): reloc against `%s': error %d"), |
d003868e | 5161 | input_bfd, input_section, |
d42c267e | 5162 | rel->r_offset, name, (int) r); |
b34976b6 | 5163 | return FALSE; |
8da6118f KH |
5164 | } |
5165 | } | |
60f2e42e L |
5166 | |
5167 | if (wrel != rel) | |
5168 | *wrel = *rel; | |
5169 | } | |
5170 | ||
5171 | if (wrel != rel) | |
5172 | { | |
5173 | Elf_Internal_Shdr *rel_hdr; | |
5174 | size_t deleted = rel - wrel; | |
5175 | ||
5176 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
5177 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5178 | if (rel_hdr->sh_size == 0) | |
5179 | { | |
5180 | /* It is too late to remove an empty reloc section. Leave | |
5181 | one NONE reloc. | |
5182 | ??? What is wrong with an empty section??? */ | |
5183 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
5184 | deleted -= 1; | |
5185 | } | |
5186 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
5187 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5188 | input_section->reloc_count -= deleted; | |
8d88c4ca | 5189 | } |
70256ad8 | 5190 | |
b34976b6 | 5191 | return TRUE; |
70256ad8 AJ |
5192 | } |
5193 | ||
5194 | /* Finish up dynamic symbol handling. We set the contents of various | |
5195 | dynamic sections here. */ | |
5196 | ||
b34976b6 | 5197 | static bfd_boolean |
351f65ca L |
5198 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
5199 | struct bfd_link_info *info, | |
5200 | struct elf_link_hash_entry *h, | |
aec6b87e | 5201 | Elf_Internal_Sym *sym) |
70256ad8 | 5202 | { |
0afcef53 | 5203 | struct elf_x86_link_hash_table *htab; |
f2c29a16 | 5204 | bfd_boolean use_plt_second; |
0afcef53 | 5205 | struct elf_x86_link_hash_entry *eh; |
aec6b87e | 5206 | bfd_boolean local_undefweak; |
70256ad8 | 5207 | |
0afcef53 | 5208 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
5209 | if (htab == NULL) |
5210 | return FALSE; | |
70256ad8 | 5211 | |
f2c29a16 L |
5212 | /* Use the second PLT section only if there is .plt section. */ |
5213 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
0ff2b86e | 5214 | |
0afcef53 | 5215 | eh = (struct elf_x86_link_hash_entry *) h; |
9e9821dd L |
5216 | if (eh->no_finish_dynamic_symbol) |
5217 | abort (); | |
dd7e64d4 | 5218 | |
aec6b87e L |
5219 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
5220 | resolved undefined weak symbols in executable so that their | |
5221 | references have value 0 at run-time. */ | |
e62b9723 | 5222 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
0afcef53 | 5223 | X86_64_ELF_DATA, |
e62b9723 L |
5224 | eh->has_got_reloc, |
5225 | eh); | |
aec6b87e | 5226 | |
70256ad8 AJ |
5227 | if (h->plt.offset != (bfd_vma) -1) |
5228 | { | |
70256ad8 | 5229 | bfd_vma plt_index; |
38b12349 | 5230 | bfd_vma got_offset, plt_offset; |
70256ad8 | 5231 | Elf_Internal_Rela rela; |
947216bf | 5232 | bfd_byte *loc; |
0ff2b86e | 5233 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 5234 | const struct elf_backend_data *bed; |
5974eba6 | 5235 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
5236 | |
5237 | /* When building a static executable, use .iplt, .igot.plt and | |
5238 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 5239 | if (htab->elf.splt != NULL) |
cbe950e9 | 5240 | { |
6de2ae4a L |
5241 | plt = htab->elf.splt; |
5242 | gotplt = htab->elf.sgotplt; | |
5243 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
5244 | } |
5245 | else | |
5246 | { | |
6de2ae4a L |
5247 | plt = htab->elf.iplt; |
5248 | gotplt = htab->elf.igotplt; | |
5249 | relplt = htab->elf.irelplt; | |
cbe950e9 | 5250 | } |
70256ad8 AJ |
5251 | |
5252 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 5253 | it up. */ |
cbe950e9 | 5254 | if ((h->dynindx == -1 |
aec6b87e | 5255 | && !local_undefweak |
0e1862bb | 5256 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
5257 | && h->def_regular |
5258 | && h->type == STT_GNU_IFUNC)) | |
5259 | || plt == NULL | |
5260 | || gotplt == NULL | |
5261 | || relplt == NULL) | |
cec7f46a | 5262 | abort (); |
70256ad8 AJ |
5263 | |
5264 | /* Get the index in the procedure linkage table which | |
5265 | corresponds to this symbol. This is the index of this symbol | |
5266 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 5267 | first entry in the procedure linkage table is reserved. |
6bbec505 | 5268 | |
cbe950e9 | 5269 | Get the offset into the .got table of the entry that |
407443a3 | 5270 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
5271 | bytes. The first three are reserved for the dynamic linker. |
5272 | ||
5273 | For static executables, we don't reserve anything. */ | |
5274 | ||
6de2ae4a | 5275 | if (plt == htab->elf.splt) |
cbe950e9 | 5276 | { |
765e526c L |
5277 | got_offset = (h->plt.offset / htab->plt.plt_entry_size |
5278 | - htab->plt.has_plt0); | |
e1f98742 | 5279 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
5280 | } |
5281 | else | |
5282 | { | |
765e526c | 5283 | got_offset = h->plt.offset / htab->plt.plt_entry_size; |
e1f98742 | 5284 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 5285 | } |
70256ad8 | 5286 | |
38b12349 | 5287 | /* Fill in the entry in the procedure linkage table. */ |
765e526c L |
5288 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, |
5289 | htab->plt.plt_entry_size); | |
f2c29a16 | 5290 | if (use_plt_second) |
0ff2b86e | 5291 | { |
f2c29a16 | 5292 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
765e526c L |
5293 | htab->non_lazy_plt->plt_entry, |
5294 | htab->non_lazy_plt->plt_entry_size); | |
0ff2b86e | 5295 | |
f2c29a16 L |
5296 | resolved_plt = htab->plt_second; |
5297 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
5298 | } |
5299 | else | |
5300 | { | |
0ff2b86e L |
5301 | resolved_plt = plt; |
5302 | plt_offset = h->plt.offset; | |
5303 | } | |
eed180f8 RM |
5304 | |
5305 | /* Insert the relocation positions of the plt section. */ | |
5306 | ||
5307 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
5308 | subtracting the size of that instruction. */ | |
ab7fede8 L |
5309 | plt_got_pcrel_offset = (gotplt->output_section->vma |
5310 | + gotplt->output_offset | |
5311 | + got_offset | |
5312 | - resolved_plt->output_section->vma | |
5313 | - resolved_plt->output_offset | |
5314 | - plt_offset | |
765e526c | 5315 | - htab->plt.plt_got_insn_size); |
ab7fede8 L |
5316 | |
5317 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 5318 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
695344c0 | 5319 | /* xgettext:c-format */ |
ab7fede8 L |
5320 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"), |
5321 | output_bfd, h->root.root.string); | |
5322 | ||
5323 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
38b12349 | 5324 | (resolved_plt->contents + plt_offset |
765e526c | 5325 | + htab->plt.plt_got_offset)); |
cbe950e9 | 5326 | |
653165cc | 5327 | /* Fill in the entry in the global offset table, initially this |
aec6b87e L |
5328 | points to the second part of the PLT entry. Leave the entry |
5329 | as zero for undefined weak symbol in PIE. No PLT relocation | |
5330 | against undefined weak symbol in PIE. */ | |
5331 | if (!local_undefweak) | |
cbe950e9 | 5332 | { |
765e526c | 5333 | if (htab->plt.has_plt0) |
38b12349 L |
5334 | bfd_put_64 (output_bfd, (plt->output_section->vma |
5335 | + plt->output_offset | |
5336 | + h->plt.offset | |
765e526c | 5337 | + htab->lazy_plt->plt_lazy_offset), |
38b12349 | 5338 | gotplt->contents + got_offset); |
aec6b87e L |
5339 | |
5340 | /* Fill in the entry in the .rela.plt section. */ | |
5341 | rela.r_offset = (gotplt->output_section->vma | |
5342 | + gotplt->output_offset | |
5343 | + got_offset); | |
5344 | if (h->dynindx == -1 | |
5345 | || ((bfd_link_executable (info) | |
5346 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
5347 | && h->def_regular | |
5348 | && h->type == STT_GNU_IFUNC)) | |
5349 | { | |
6322e5c5 L |
5350 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
5351 | h->root.root.string, | |
5352 | h->root.u.def.section->owner); | |
5353 | ||
aec6b87e L |
5354 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
5355 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
5356 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); | |
5357 | rela.r_addend = (h->root.u.def.value | |
5358 | + h->root.u.def.section->output_section->vma | |
5359 | + h->root.u.def.section->output_offset); | |
5360 | /* R_X86_64_IRELATIVE comes last. */ | |
5361 | plt_index = htab->next_irelative_index--; | |
5362 | } | |
5363 | else | |
5364 | { | |
5365 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); | |
5366 | rela.r_addend = 0; | |
5367 | plt_index = htab->next_jump_slot_index++; | |
5368 | } | |
e1f98742 | 5369 | |
38b12349 L |
5370 | /* Don't fill the second and third slots in PLT entry for |
5371 | static executables nor without PLT0. */ | |
765e526c | 5372 | if (plt == htab->elf.splt && htab->plt.has_plt0) |
aec6b87e | 5373 | { |
38b12349 | 5374 | bfd_vma plt0_offset |
765e526c | 5375 | = h->plt.offset + htab->lazy_plt->plt_plt_insn_end; |
aec6b87e L |
5376 | |
5377 | /* Put relocation index. */ | |
5378 | bfd_put_32 (output_bfd, plt_index, | |
5379 | (plt->contents + h->plt.offset | |
765e526c | 5380 | + htab->lazy_plt->plt_reloc_offset)); |
aec6b87e L |
5381 | |
5382 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
5383 | check relocation index for overflow since branch displacement | |
5384 | will overflow first. */ | |
5385 | if (plt0_offset > 0x80000000) | |
695344c0 | 5386 | /* xgettext:c-format */ |
aec6b87e L |
5387 | info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"), |
5388 | output_bfd, h->root.root.string); | |
5389 | bfd_put_32 (output_bfd, - plt0_offset, | |
38b12349 | 5390 | (plt->contents + h->plt.offset |
765e526c | 5391 | + htab->lazy_plt->plt_plt_offset)); |
aec6b87e | 5392 | } |
351f65ca | 5393 | |
aec6b87e L |
5394 | bed = get_elf_backend_data (output_bfd); |
5395 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
5396 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
5397 | } | |
dd7e64d4 L |
5398 | } |
5399 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
5400 | { | |
38b12349 | 5401 | bfd_vma got_offset, plt_offset; |
dd7e64d4 L |
5402 | asection *plt, *got; |
5403 | bfd_boolean got_after_plt; | |
5404 | int32_t got_pcrel_offset; | |
dd7e64d4 L |
5405 | |
5406 | /* Set the entry in the GOT procedure linkage table. */ | |
5407 | plt = htab->plt_got; | |
5408 | got = htab->elf.sgot; | |
5409 | got_offset = h->got.offset; | |
5410 | ||
5411 | if (got_offset == (bfd_vma) -1 | |
e492d2f8 | 5412 | || (h->type == STT_GNU_IFUNC && h->def_regular) |
dd7e64d4 L |
5413 | || plt == NULL |
5414 | || got == NULL) | |
5415 | abort (); | |
70256ad8 | 5416 | |
38b12349 | 5417 | /* Use the non-lazy PLT entry template for the GOT PLT since they |
dd7e64d4 | 5418 | are the identical. */ |
dd7e64d4 L |
5419 | /* Fill in the entry in the GOT procedure linkage table. */ |
5420 | plt_offset = eh->plt_got.offset; | |
5421 | memcpy (plt->contents + plt_offset, | |
765e526c L |
5422 | htab->non_lazy_plt->plt_entry, |
5423 | htab->non_lazy_plt->plt_entry_size); | |
dd7e64d4 L |
5424 | |
5425 | /* Put offset the PC-relative instruction referring to the GOT | |
5426 | entry, subtracting the size of that instruction. */ | |
5427 | got_pcrel_offset = (got->output_section->vma | |
5428 | + got->output_offset | |
5429 | + got_offset | |
5430 | - plt->output_section->vma | |
5431 | - plt->output_offset | |
5432 | - plt_offset | |
765e526c | 5433 | - htab->non_lazy_plt->plt_got_insn_size); |
dd7e64d4 L |
5434 | |
5435 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
5436 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
5437 | if ((got_after_plt && got_pcrel_offset < 0) | |
5438 | || (!got_after_plt && got_pcrel_offset > 0)) | |
695344c0 | 5439 | /* xgettext:c-format */ |
dd7e64d4 L |
5440 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"), |
5441 | output_bfd, h->root.root.string); | |
5442 | ||
5443 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
38b12349 | 5444 | (plt->contents + plt_offset |
765e526c | 5445 | + htab->non_lazy_plt->plt_got_offset)); |
dd7e64d4 L |
5446 | } |
5447 | ||
aec6b87e L |
5448 | if (!local_undefweak |
5449 | && !h->def_regular | |
dd7e64d4 L |
5450 | && (h->plt.offset != (bfd_vma) -1 |
5451 | || eh->plt_got.offset != (bfd_vma) -1)) | |
5452 | { | |
5453 | /* Mark the symbol as undefined, rather than as defined in | |
5454 | the .plt section. Leave the value if there were any | |
5455 | relocations where pointer equality matters (this is a clue | |
5456 | for the dynamic linker, to make function pointer | |
5457 | comparisons work between an application and shared | |
5458 | library), otherwise set it to zero. If a function is only | |
5459 | called from a binary, there is no need to slow down | |
5460 | shared libraries because of that. */ | |
5461 | sym->st_shndx = SHN_UNDEF; | |
5462 | if (!h->pointer_equality_needed) | |
5463 | sym->st_value = 0; | |
70256ad8 AJ |
5464 | } |
5465 | ||
aec6b87e L |
5466 | /* Don't generate dynamic GOT relocation against undefined weak |
5467 | symbol in executable. */ | |
bffbf940 | 5468 | if (h->got.offset != (bfd_vma) -1 |
0afcef53 L |
5469 | && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h)->tls_type) |
5470 | && elf_x86_hash_entry (h)->tls_type != GOT_TLS_IE | |
aec6b87e | 5471 | && !local_undefweak) |
053579d7 | 5472 | { |
053579d7 | 5473 | Elf_Internal_Rela rela; |
233cc9c1 | 5474 | asection *relgot = htab->elf.srelgot; |
053579d7 AJ |
5475 | |
5476 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 5477 | up. */ |
6de2ae4a | 5478 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 5479 | abort (); |
053579d7 | 5480 | |
6de2ae4a L |
5481 | rela.r_offset = (htab->elf.sgot->output_section->vma |
5482 | + htab->elf.sgot->output_offset | |
dc810e39 | 5483 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
5484 | |
5485 | /* If this is a static link, or it is a -Bsymbolic link and the | |
5486 | symbol is defined locally or was forced to be local because | |
5487 | of a version file, we just want to emit a RELATIVE reloc. | |
5488 | The entry in the global offset table will already have been | |
5489 | initialized in the relocate_section function. */ | |
710ab287 | 5490 | if (h->def_regular |
0018b0a3 L |
5491 | && h->type == STT_GNU_IFUNC) |
5492 | { | |
233cc9c1 L |
5493 | if (h->plt.offset == (bfd_vma) -1) |
5494 | { | |
5495 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
5496 | if (htab->elf.splt == NULL) | |
5497 | { | |
5498 | /* use .rel[a].iplt section to store .got relocations | |
5499 | in static executable. */ | |
5500 | relgot = htab->elf.irelplt; | |
5501 | } | |
5502 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
5503 | { | |
6322e5c5 L |
5504 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
5505 | output_bfd, | |
5506 | h->root.root.string, | |
5507 | h->root.u.def.section->owner); | |
5508 | ||
233cc9c1 L |
5509 | rela.r_info = htab->r_info (0, |
5510 | R_X86_64_IRELATIVE); | |
5511 | rela.r_addend = (h->root.u.def.value | |
5512 | + h->root.u.def.section->output_section->vma | |
5513 | + h->root.u.def.section->output_offset); | |
5514 | } | |
5515 | else | |
5516 | goto do_glob_dat; | |
5517 | } | |
5518 | else if (bfd_link_pic (info)) | |
710ab287 L |
5519 | { |
5520 | /* Generate R_X86_64_GLOB_DAT. */ | |
5521 | goto do_glob_dat; | |
5522 | } | |
5523 | else | |
5524 | { | |
90d60710 | 5525 | asection *plt; |
aab82f4c | 5526 | bfd_vma plt_offset; |
90d60710 | 5527 | |
710ab287 L |
5528 | if (!h->pointer_equality_needed) |
5529 | abort (); | |
5530 | ||
5531 | /* For non-shared object, we can't use .got.plt, which | |
5532 | contains the real function addres if we need pointer | |
5533 | equality. We load the GOT entry with the PLT entry. */ | |
f2c29a16 | 5534 | if (htab->plt_second != NULL) |
aab82f4c | 5535 | { |
f2c29a16 L |
5536 | plt = htab->plt_second; |
5537 | plt_offset = eh->plt_second.offset; | |
aab82f4c L |
5538 | } |
5539 | else | |
5540 | { | |
5541 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
5542 | plt_offset = h->plt.offset; | |
5543 | } | |
710ab287 L |
5544 | bfd_put_64 (output_bfd, (plt->output_section->vma |
5545 | + plt->output_offset | |
aab82f4c | 5546 | + plt_offset), |
6de2ae4a | 5547 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
5548 | return TRUE; |
5549 | } | |
0018b0a3 | 5550 | } |
0e1862bb | 5551 | else if (bfd_link_pic (info) |
0018b0a3 | 5552 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
053579d7 | 5553 | { |
41bed6dd L |
5554 | if (!h->def_regular) |
5555 | return FALSE; | |
cc78d0af | 5556 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 5557 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
5558 | rela.r_addend = (h->root.u.def.value |
5559 | + h->root.u.def.section->output_section->vma | |
5560 | + h->root.u.def.section->output_offset); | |
5561 | } | |
5562 | else | |
5563 | { | |
5564 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 5565 | do_glob_dat: |
c434dee6 | 5566 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 5567 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 5568 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
5569 | rela.r_addend = 0; |
5570 | } | |
5571 | ||
233cc9c1 | 5572 | elf_append_rela (output_bfd, relgot, &rela); |
053579d7 AJ |
5573 | } |
5574 | ||
f5385ebf | 5575 | if (h->needs_copy) |
70256ad8 | 5576 | { |
70256ad8 | 5577 | Elf_Internal_Rela rela; |
5474d94f | 5578 | asection *s; |
70256ad8 AJ |
5579 | |
5580 | /* This symbol needs a copy reloc. Set it up. */ | |
5581 | ||
c434dee6 AJ |
5582 | if (h->dynindx == -1 |
5583 | || (h->root.type != bfd_link_hash_defined | |
5584 | && h->root.type != bfd_link_hash_defweak) | |
5474d94f AM |
5585 | || htab->elf.srelbss == NULL |
5586 | || htab->elf.sreldynrelro == NULL) | |
c434dee6 | 5587 | abort (); |
70256ad8 AJ |
5588 | |
5589 | rela.r_offset = (h->root.u.def.value | |
5590 | + h->root.u.def.section->output_section->vma | |
5591 | + h->root.u.def.section->output_offset); | |
351f65ca | 5592 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 5593 | rela.r_addend = 0; |
afbf7e8e | 5594 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
5595 | s = htab->elf.sreldynrelro; |
5596 | else | |
5597 | s = htab->elf.srelbss; | |
5598 | elf_append_rela (output_bfd, s, &rela); | |
70256ad8 AJ |
5599 | } |
5600 | ||
b34976b6 | 5601 | return TRUE; |
70256ad8 AJ |
5602 | } |
5603 | ||
c25bc9fc L |
5604 | /* Finish up local dynamic symbol handling. We set the contents of |
5605 | various dynamic sections here. */ | |
5606 | ||
5607 | static bfd_boolean | |
351f65ca | 5608 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
5609 | { |
5610 | struct elf_link_hash_entry *h | |
5611 | = (struct elf_link_hash_entry *) *slot; | |
5612 | struct bfd_link_info *info | |
eed180f8 | 5613 | = (struct bfd_link_info *) inf; |
c25bc9fc | 5614 | |
351f65ca | 5615 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
5f0f0847 | 5616 | info, h, NULL); |
c25bc9fc L |
5617 | } |
5618 | ||
aec6b87e L |
5619 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
5620 | here since undefined weak symbol may not be dynamic and may not be | |
5621 | called for elf_x86_64_finish_dynamic_symbol. */ | |
5622 | ||
5623 | static bfd_boolean | |
5624 | elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
5625 | void *inf) | |
5626 | { | |
5627 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
5628 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
5629 | ||
5630 | if (h->root.type != bfd_link_hash_undefweak | |
5631 | || h->dynindx != -1) | |
5632 | return TRUE; | |
5633 | ||
5634 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, | |
5f0f0847 | 5635 | info, h, NULL); |
aec6b87e L |
5636 | } |
5637 | ||
c434dee6 AJ |
5638 | /* Used to decide how to sort relocs in an optimal manner for the |
5639 | dynamic linker, before writing them out. */ | |
5640 | ||
5641 | static enum elf_reloc_type_class | |
cae1fbbb | 5642 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
5643 | const asection *rel_sec ATTRIBUTE_UNUSED, |
5644 | const Elf_Internal_Rela *rela) | |
c434dee6 | 5645 | { |
cae1fbbb L |
5646 | bfd *abfd = info->output_bfd; |
5647 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
0afcef53 L |
5648 | struct elf_x86_link_hash_table *htab |
5649 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
cae1fbbb | 5650 | |
d9e3b590 L |
5651 | if (htab->elf.dynsym != NULL |
5652 | && htab->elf.dynsym->contents != NULL) | |
5653 | { | |
5654 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
5655 | dynamic symbols. */ | |
5656 | unsigned long r_symndx = htab->r_sym (rela->r_info); | |
897463b1 L |
5657 | if (r_symndx != STN_UNDEF) |
5658 | { | |
5659 | Elf_Internal_Sym sym; | |
5660 | if (!bed->s->swap_symbol_in (abfd, | |
5661 | (htab->elf.dynsym->contents | |
5662 | + r_symndx * bed->s->sizeof_sym), | |
5663 | 0, &sym)) | |
5664 | abort (); | |
d9e3b590 | 5665 | |
897463b1 L |
5666 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
5667 | return reloc_class_ifunc; | |
5668 | } | |
d9e3b590 | 5669 | } |
cae1fbbb | 5670 | |
351f65ca | 5671 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 | 5672 | { |
c428ce9d L |
5673 | case R_X86_64_IRELATIVE: |
5674 | return reloc_class_ifunc; | |
c434dee6 | 5675 | case R_X86_64_RELATIVE: |
1da80baa | 5676 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
5677 | return reloc_class_relative; |
5678 | case R_X86_64_JUMP_SLOT: | |
5679 | return reloc_class_plt; | |
5680 | case R_X86_64_COPY: | |
5681 | return reloc_class_copy; | |
5682 | default: | |
5683 | return reloc_class_normal; | |
5684 | } | |
5685 | } | |
5686 | ||
70256ad8 AJ |
5687 | /* Finish up the dynamic sections. */ |
5688 | ||
b34976b6 | 5689 | static bfd_boolean |
351f65ca L |
5690 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
5691 | struct bfd_link_info *info) | |
70256ad8 | 5692 | { |
0afcef53 | 5693 | struct elf_x86_link_hash_table *htab; |
70256ad8 AJ |
5694 | bfd *dynobj; |
5695 | asection *sdyn; | |
70256ad8 | 5696 | |
0afcef53 | 5697 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
5698 | if (htab == NULL) |
5699 | return FALSE; | |
5700 | ||
c434dee6 | 5701 | dynobj = htab->elf.dynobj; |
3d4d4302 | 5702 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
70256ad8 | 5703 | |
c434dee6 | 5704 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 5705 | { |
82e96e07 L |
5706 | bfd_byte *dyncon, *dynconend; |
5707 | const struct elf_backend_data *bed; | |
5708 | bfd_size_type sizeof_dyn; | |
70256ad8 | 5709 | |
6de2ae4a | 5710 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 5711 | abort (); |
70256ad8 | 5712 | |
82e96e07 L |
5713 | bed = get_elf_backend_data (dynobj); |
5714 | sizeof_dyn = bed->s->sizeof_dyn; | |
5715 | dyncon = sdyn->contents; | |
5716 | dynconend = sdyn->contents + sdyn->size; | |
5717 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
5718 | { |
5719 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
5720 | asection *s; |
5721 | ||
82e96e07 | 5722 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
5723 | |
5724 | switch (dyn.d_tag) | |
5725 | { | |
5726 | default: | |
053579d7 | 5727 | continue; |
70256ad8 AJ |
5728 | |
5729 | case DT_PLTGOT: | |
6de2ae4a | 5730 | s = htab->elf.sgotplt; |
8c37241b | 5731 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 5732 | break; |
70256ad8 AJ |
5733 | |
5734 | case DT_JMPREL: | |
6de2ae4a | 5735 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 5736 | break; |
70256ad8 | 5737 | |
c434dee6 | 5738 | case DT_PLTRELSZ: |
6de2ae4a | 5739 | s = htab->elf.srelplt->output_section; |
eea6121a | 5740 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
5741 | break; |
5742 | ||
67a4f2b7 | 5743 | case DT_TLSDESC_PLT: |
6de2ae4a | 5744 | s = htab->elf.splt; |
67a4f2b7 AO |
5745 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
5746 | + htab->tlsdesc_plt; | |
5747 | break; | |
5748 | ||
5749 | case DT_TLSDESC_GOT: | |
6de2ae4a | 5750 | s = htab->elf.sgot; |
67a4f2b7 AO |
5751 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
5752 | + htab->tlsdesc_got; | |
5753 | break; | |
70256ad8 | 5754 | } |
c434dee6 | 5755 | |
82e96e07 | 5756 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
5757 | } |
5758 | ||
6de2ae4a | 5759 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 5760 | { |
eed180f8 | 5761 | elf_section_data (htab->elf.splt->output_section) |
765e526c | 5762 | ->this_hdr.sh_entsize = htab->plt.plt_entry_size; |
67a4f2b7 | 5763 | |
765e526c | 5764 | if (htab->plt.has_plt0) |
67a4f2b7 | 5765 | { |
38b12349 L |
5766 | /* Fill in the special first entry in the procedure linkage |
5767 | table. */ | |
5768 | memcpy (htab->elf.splt->contents, | |
765e526c L |
5769 | htab->lazy_plt->plt0_entry, |
5770 | htab->lazy_plt->plt0_entry_size); | |
38b12349 L |
5771 | /* Add offset for pushq GOT+8(%rip), since the instruction |
5772 | uses 6 bytes subtract this value. */ | |
67a4f2b7 | 5773 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5774 | (htab->elf.sgotplt->output_section->vma |
5775 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 5776 | + 8 |
6de2ae4a L |
5777 | - htab->elf.splt->output_section->vma |
5778 | - htab->elf.splt->output_offset | |
67a4f2b7 | 5779 | - 6), |
38b12349 | 5780 | (htab->elf.splt->contents |
765e526c | 5781 | + htab->lazy_plt->plt0_got1_offset)); |
38b12349 L |
5782 | /* Add offset for the PC-relative instruction accessing |
5783 | GOT+16, subtracting the offset to the end of that | |
5784 | instruction. */ | |
67a4f2b7 | 5785 | bfd_put_32 (output_bfd, |
38b12349 L |
5786 | (htab->elf.sgotplt->output_section->vma |
5787 | + htab->elf.sgotplt->output_offset | |
5788 | + 16 | |
6de2ae4a L |
5789 | - htab->elf.splt->output_section->vma |
5790 | - htab->elf.splt->output_offset | |
765e526c | 5791 | - htab->lazy_plt->plt0_got2_insn_end), |
38b12349 | 5792 | (htab->elf.splt->contents |
765e526c | 5793 | + htab->lazy_plt->plt0_got2_offset)); |
38b12349 L |
5794 | |
5795 | if (htab->tlsdesc_plt) | |
5796 | { | |
5797 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
5798 | htab->elf.sgot->contents + htab->tlsdesc_got); | |
5799 | ||
5800 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, | |
765e526c L |
5801 | htab->lazy_plt->plt0_entry, |
5802 | htab->lazy_plt->plt0_entry_size); | |
38b12349 L |
5803 | |
5804 | /* Add offset for pushq GOT+8(%rip), since the | |
5805 | instruction uses 6 bytes subtract this value. */ | |
5806 | bfd_put_32 (output_bfd, | |
5807 | (htab->elf.sgotplt->output_section->vma | |
5808 | + htab->elf.sgotplt->output_offset | |
5809 | + 8 | |
5810 | - htab->elf.splt->output_section->vma | |
5811 | - htab->elf.splt->output_offset | |
5812 | - htab->tlsdesc_plt | |
5813 | - 6), | |
5814 | (htab->elf.splt->contents | |
5815 | + htab->tlsdesc_plt | |
765e526c | 5816 | + htab->lazy_plt->plt0_got1_offset)); |
38b12349 L |
5817 | /* Add offset for the PC-relative instruction accessing |
5818 | GOT+TDG, where TDG stands for htab->tlsdesc_got, | |
5819 | subtracting the offset to the end of that | |
5820 | instruction. */ | |
5821 | bfd_put_32 (output_bfd, | |
5822 | (htab->elf.sgot->output_section->vma | |
5823 | + htab->elf.sgot->output_offset | |
5824 | + htab->tlsdesc_got | |
5825 | - htab->elf.splt->output_section->vma | |
5826 | - htab->elf.splt->output_offset | |
5827 | - htab->tlsdesc_plt | |
765e526c | 5828 | - htab->lazy_plt->plt0_got2_insn_end), |
38b12349 L |
5829 | (htab->elf.splt->contents |
5830 | + htab->tlsdesc_plt | |
765e526c | 5831 | + htab->lazy_plt->plt0_got2_offset)); |
38b12349 | 5832 | } |
67a4f2b7 | 5833 | } |
70256ad8 | 5834 | } |
70256ad8 | 5835 | |
0afcef53 L |
5836 | if (htab->plt_got != NULL && htab->plt_got->size > 0) |
5837 | elf_section_data (htab->plt_got->output_section) | |
765e526c | 5838 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; |
38b12349 | 5839 | |
0afcef53 L |
5840 | if (htab->plt_second != NULL && htab->plt_second->size > 0) |
5841 | elf_section_data (htab->plt_second->output_section) | |
765e526c | 5842 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; |
0afcef53 | 5843 | } |
0ff2b86e | 5844 | |
38b12349 L |
5845 | /* GOT is always created in setup_gnu_properties. But it may not be |
5846 | needed. */ | |
5847 | if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0) | |
70256ad8 | 5848 | { |
56d4289c L |
5849 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
5850 | { | |
4eca0228 | 5851 | _bfd_error_handler |
56d4289c L |
5852 | (_("discarded output section: `%A'"), htab->elf.sgotplt); |
5853 | return FALSE; | |
5854 | } | |
5855 | ||
38b12349 L |
5856 | /* Set the first entry in the global offset table to the address of |
5857 | the dynamic section. */ | |
5858 | if (sdyn == NULL) | |
5859 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); | |
5860 | else | |
5861 | bfd_put_64 (output_bfd, | |
5862 | sdyn->output_section->vma + sdyn->output_offset, | |
5863 | htab->elf.sgotplt->contents); | |
5864 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ | |
5865 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
5866 | htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); | |
5867 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
5868 | htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
5869 | ||
5870 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize | |
5871 | = GOT_ENTRY_SIZE; | |
c434dee6 | 5872 | } |
70256ad8 | 5873 | |
e41b3a13 | 5874 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
5875 | if (htab->plt_eh_frame != NULL |
5876 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
5877 | { |
5878 | if (htab->elf.splt != NULL | |
5879 | && htab->elf.splt->size != 0 | |
5880 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
5881 | && htab->elf.splt->output_section != NULL | |
5882 | && htab->plt_eh_frame->output_section != NULL) | |
5883 | { | |
5884 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
5885 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
5886 | + htab->plt_eh_frame->output_offset | |
5887 | + PLT_FDE_START_OFFSET; | |
5888 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5889 | htab->plt_eh_frame->contents | |
5890 | + PLT_FDE_START_OFFSET); | |
5891 | } | |
dbaa2011 | 5892 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
5893 | { |
5894 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5895 | htab->plt_eh_frame, | |
5896 | htab->plt_eh_frame->contents)) | |
5897 | return FALSE; | |
5898 | } | |
5899 | } | |
5900 | ||
fff53dae L |
5901 | /* Adjust .eh_frame for .plt.got section. */ |
5902 | if (htab->plt_got_eh_frame != NULL | |
5903 | && htab->plt_got_eh_frame->contents != NULL) | |
5904 | { | |
5905 | if (htab->plt_got != NULL | |
5906 | && htab->plt_got->size != 0 | |
5907 | && (htab->plt_got->flags & SEC_EXCLUDE) == 0 | |
5908 | && htab->plt_got->output_section != NULL | |
5909 | && htab->plt_got_eh_frame->output_section != NULL) | |
5910 | { | |
5911 | bfd_vma plt_start = htab->plt_got->output_section->vma; | |
5912 | bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma | |
5913 | + htab->plt_got_eh_frame->output_offset | |
5914 | + PLT_FDE_START_OFFSET; | |
5915 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5916 | htab->plt_got_eh_frame->contents | |
5917 | + PLT_FDE_START_OFFSET); | |
5918 | } | |
5919 | if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
5920 | { | |
5921 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5922 | htab->plt_got_eh_frame, | |
5923 | htab->plt_got_eh_frame->contents)) | |
5924 | return FALSE; | |
5925 | } | |
5926 | } | |
5927 | ||
f2c29a16 L |
5928 | /* Adjust .eh_frame for the second PLT section. */ |
5929 | if (htab->plt_second_eh_frame != NULL | |
5930 | && htab->plt_second_eh_frame->contents != NULL) | |
8361ed4d | 5931 | { |
f2c29a16 L |
5932 | if (htab->plt_second != NULL |
5933 | && htab->plt_second->size != 0 | |
5934 | && (htab->plt_second->flags & SEC_EXCLUDE) == 0 | |
5935 | && htab->plt_second->output_section != NULL | |
5936 | && htab->plt_second_eh_frame->output_section != NULL) | |
8361ed4d | 5937 | { |
f2c29a16 L |
5938 | bfd_vma plt_start = htab->plt_second->output_section->vma; |
5939 | bfd_vma eh_frame_start | |
5940 | = (htab->plt_second_eh_frame->output_section->vma | |
5941 | + htab->plt_second_eh_frame->output_offset | |
5942 | + PLT_FDE_START_OFFSET); | |
8361ed4d | 5943 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, |
f2c29a16 | 5944 | htab->plt_second_eh_frame->contents |
8361ed4d L |
5945 | + PLT_FDE_START_OFFSET); |
5946 | } | |
f2c29a16 L |
5947 | if (htab->plt_second_eh_frame->sec_info_type |
5948 | == SEC_INFO_TYPE_EH_FRAME) | |
8361ed4d L |
5949 | { |
5950 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
f2c29a16 L |
5951 | htab->plt_second_eh_frame, |
5952 | htab->plt_second_eh_frame->contents)) | |
8361ed4d L |
5953 | return FALSE; |
5954 | } | |
5955 | } | |
5956 | ||
6de2ae4a L |
5957 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
5958 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
5959 | = GOT_ENTRY_SIZE; |
5960 | ||
aec6b87e L |
5961 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
5962 | if (bfd_link_pie (info)) | |
5963 | bfd_hash_traverse (&info->hash->table, | |
5964 | elf_x86_64_pie_finish_undefweak_symbol, | |
5965 | info); | |
5966 | ||
b34976b6 | 5967 | return TRUE; |
8d88c4ca NC |
5968 | } |
5969 | ||
233cc9c1 L |
5970 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
5971 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
5972 | It has to be done before elf_link_sort_relocs is called so that | |
5973 | dynamic relocations are properly sorted. */ | |
5974 | ||
5975 | static bfd_boolean | |
5976 | elf_x86_64_output_arch_local_syms | |
5977 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
5978 | struct bfd_link_info *info, | |
5979 | void *flaginfo ATTRIBUTE_UNUSED, | |
5980 | int (*func) (void *, const char *, | |
5981 | Elf_Internal_Sym *, | |
5982 | asection *, | |
5983 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
5984 | { | |
0afcef53 L |
5985 | struct elf_x86_link_hash_table *htab |
5986 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
233cc9c1 L |
5987 | if (htab == NULL) |
5988 | return FALSE; | |
5989 | ||
5990 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
5991 | htab_traverse (htab->loc_hash_table, | |
5992 | elf_x86_64_finish_local_dynamic_symbol, | |
5993 | info); | |
5994 | ||
5995 | return TRUE; | |
5996 | } | |
5997 | ||
38b12349 | 5998 | /* Forward declaration. */ |
765e526c | 5999 | static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt; |
38b12349 L |
6000 | |
6001 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all | |
6002 | dynamic relocations. */ | |
6003 | ||
6004 | static long | |
6005 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
6006 | long symcount ATTRIBUTE_UNUSED, | |
6007 | asymbol **syms ATTRIBUTE_UNUSED, | |
6008 | long dynsymcount, | |
6009 | asymbol **dynsyms, | |
6010 | asymbol **ret) | |
6011 | { | |
f493882d | 6012 | long count, i, n; |
38b12349 | 6013 | int j; |
38b12349 | 6014 | bfd_byte *plt_contents; |
f493882d | 6015 | long relsize; |
765e526c L |
6016 | const struct elf_x86_lazy_plt_layout *lazy_plt; |
6017 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
6018 | const struct elf_x86_lazy_plt_layout *lazy_bnd_plt; | |
6019 | const struct elf_x86_non_lazy_plt_layout *non_lazy_bnd_plt; | |
6020 | const struct elf_x86_lazy_plt_layout *lazy_ibt_plt; | |
6021 | const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt; | |
38b12349 | 6022 | asection *plt; |
f493882d L |
6023 | enum elf_x86_plt_type plt_type; |
6024 | struct elf_x86_plt plts[] = | |
144bed8d | 6025 | { |
38b12349 L |
6026 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
6027 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
f2c29a16 L |
6028 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, |
6029 | { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
dd9e66ee | 6030 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } |
38b12349 | 6031 | }; |
144bed8d | 6032 | |
38b12349 | 6033 | *ret = NULL; |
144bed8d | 6034 | |
38b12349 L |
6035 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
6036 | return 0; | |
144bed8d | 6037 | |
38b12349 L |
6038 | if (dynsymcount <= 0) |
6039 | return 0; | |
cca5b8b6 | 6040 | |
38b12349 L |
6041 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
6042 | if (relsize <= 0) | |
6043 | return -1; | |
6044 | ||
38b12349 | 6045 | if (get_elf_x86_64_backend_data (abfd)->os == is_normal) |
144bed8d | 6046 | { |
38b12349 L |
6047 | lazy_plt = &elf_x86_64_lazy_plt; |
6048 | non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
6049 | lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt; | |
6050 | non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt; | |
ee2fdd6f L |
6051 | if (ABI_64_P (abfd)) |
6052 | { | |
6053 | lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; | |
6054 | non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
6055 | } | |
6056 | else | |
6057 | { | |
6058 | lazy_ibt_plt = &elf_x32_lazy_ibt_plt; | |
6059 | non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
6060 | } | |
38b12349 L |
6061 | } |
6062 | else | |
6063 | { | |
6064 | lazy_plt = &elf_x86_64_nacl_plt; | |
6065 | non_lazy_plt = NULL; | |
6066 | lazy_bnd_plt = NULL; | |
6067 | non_lazy_bnd_plt = NULL; | |
ee2fdd6f L |
6068 | lazy_ibt_plt = NULL; |
6069 | non_lazy_ibt_plt = NULL; | |
38b12349 | 6070 | } |
144bed8d | 6071 | |
38b12349 L |
6072 | count = 0; |
6073 | for (j = 0; plts[j].name != NULL; j++) | |
6074 | { | |
6075 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
90efb642 | 6076 | if (plt == NULL || plt->size == 0) |
6f25f223 | 6077 | continue; |
533d0af0 | 6078 | |
38b12349 L |
6079 | /* Get the PLT section contents. */ |
6080 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
6081 | if (plt_contents == NULL) | |
6082 | break; | |
6083 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
6084 | plt_contents, 0, plt->size)) | |
6085 | { | |
6086 | free (plt_contents); | |
6087 | break; | |
6088 | } | |
144bed8d | 6089 | |
38b12349 L |
6090 | /* Check what kind of PLT it is. */ |
6091 | plt_type = plt_unknown; | |
90efb642 L |
6092 | if (plts[j].type == plt_unknown |
6093 | && (plt->size >= (lazy_plt->plt_entry_size | |
6094 | + lazy_plt->plt_entry_size))) | |
144bed8d | 6095 | { |
38b12349 L |
6096 | /* Match lazy PLT first. Need to check the first two |
6097 | instructions. */ | |
6098 | if ((memcmp (plt_contents, lazy_plt->plt0_entry, | |
6099 | lazy_plt->plt0_got1_offset) == 0) | |
6100 | && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6, | |
6101 | 2) == 0)) | |
6102 | plt_type = plt_lazy; | |
6103 | else if (lazy_bnd_plt != NULL | |
6104 | && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry, | |
6105 | lazy_bnd_plt->plt0_got1_offset) == 0) | |
6106 | && (memcmp (plt_contents + 6, | |
6107 | lazy_bnd_plt->plt0_entry + 6, 3) == 0)) | |
ec1f73bb | 6108 | { |
f2c29a16 | 6109 | plt_type = plt_lazy | plt_second; |
ee2fdd6f L |
6110 | /* The fist entry in the lazy IBT PLT is the same as the |
6111 | lazy BND PLT. */ | |
6112 | if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size, | |
6113 | lazy_ibt_plt->plt_entry, | |
6114 | lazy_ibt_plt->plt_got_offset) == 0)) | |
6115 | lazy_plt = lazy_ibt_plt; | |
6116 | else | |
6117 | lazy_plt = lazy_bnd_plt; | |
ec1f73bb | 6118 | } |
144bed8d | 6119 | } |
fca6ae69 | 6120 | |
38b12349 | 6121 | if (non_lazy_plt != NULL |
90efb642 L |
6122 | && (plt_type == plt_unknown || plt_type == plt_non_lazy) |
6123 | && plt->size >= non_lazy_plt->plt_entry_size) | |
38b12349 L |
6124 | { |
6125 | /* Match non-lazy PLT. */ | |
6126 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
6127 | non_lazy_plt->plt_got_offset) == 0) | |
6128 | plt_type = plt_non_lazy; | |
6129 | } | |
6130 | ||
ee2fdd6f | 6131 | if (plt_type == plt_unknown || plt_type == plt_second) |
38b12349 | 6132 | { |
ee2fdd6f | 6133 | if (non_lazy_bnd_plt != NULL |
90efb642 | 6134 | && plt->size >= non_lazy_bnd_plt->plt_entry_size |
ee2fdd6f L |
6135 | && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry, |
6136 | non_lazy_bnd_plt->plt_got_offset) == 0)) | |
38b12349 | 6137 | { |
ee2fdd6f | 6138 | /* Match BND PLT. */ |
f2c29a16 | 6139 | plt_type = plt_second; |
38b12349 L |
6140 | non_lazy_plt = non_lazy_bnd_plt; |
6141 | } | |
ee2fdd6f | 6142 | else if (non_lazy_ibt_plt != NULL |
90efb642 | 6143 | && plt->size >= non_lazy_ibt_plt->plt_entry_size |
ee2fdd6f L |
6144 | && (memcmp (plt_contents, |
6145 | non_lazy_ibt_plt->plt_entry, | |
6146 | non_lazy_ibt_plt->plt_got_offset) == 0)) | |
6147 | { | |
6148 | /* Match IBT PLT. */ | |
6149 | plt_type = plt_second; | |
6150 | non_lazy_plt = non_lazy_ibt_plt; | |
6151 | } | |
38b12349 L |
6152 | } |
6153 | ||
6154 | if (plt_type == plt_unknown) | |
37c0b6ee L |
6155 | { |
6156 | free (plt_contents); | |
6157 | continue; | |
6158 | } | |
38b12349 L |
6159 | |
6160 | plts[j].sec = plt; | |
6161 | plts[j].type = plt_type; | |
6162 | ||
6163 | if ((plt_type & plt_lazy)) | |
6164 | { | |
6165 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
6166 | plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size; | |
6167 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
6168 | /* Skip PLT0 in lazy PLT. */ | |
6169 | i = 1; | |
6170 | } | |
6171 | else | |
6172 | { | |
6173 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
6174 | plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size; | |
6175 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
6176 | i = 0; | |
6177 | } | |
6178 | ||
f2c29a16 L |
6179 | /* Skip lazy PLT when the second PLT is used. */ |
6180 | if (plt_type == (plt_lazy | plt_second)) | |
38b12349 L |
6181 | plts[j].count = 0; |
6182 | else | |
6183 | { | |
6184 | n = plt->size / plts[j].plt_entry_size; | |
6185 | plts[j].count = n; | |
6186 | count += n - i; | |
6187 | } | |
6188 | ||
6189 | plts[j].contents = plt_contents; | |
144bed8d L |
6190 | } |
6191 | ||
f493882d L |
6192 | return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize, |
6193 | (bfd_vma) 0, plts, dynsyms, | |
6194 | ret); | |
0ff2b86e L |
6195 | } |
6196 | ||
d2b2c203 DJ |
6197 | /* Handle an x86-64 specific section when reading an object file. This |
6198 | is called when elfcode.h finds a section with an unknown type. */ | |
6199 | ||
6200 | static bfd_boolean | |
0c723101 L |
6201 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
6202 | const char *name, int shindex) | |
d2b2c203 DJ |
6203 | { |
6204 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
6205 | return FALSE; | |
6206 | ||
6dc132d9 | 6207 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
6208 | return FALSE; |
6209 | ||
6210 | return TRUE; | |
6211 | } | |
6212 | ||
3b22753a L |
6213 | /* Hook called by the linker routine which adds symbols from an object |
6214 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
6215 | of .bss. */ | |
6216 | ||
6217 | static bfd_boolean | |
351f65ca | 6218 | elf_x86_64_add_symbol_hook (bfd *abfd, |
a43942db | 6219 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
351f65ca L |
6220 | Elf_Internal_Sym *sym, |
6221 | const char **namep ATTRIBUTE_UNUSED, | |
6222 | flagword *flagsp ATTRIBUTE_UNUSED, | |
6223 | asection **secp, | |
6224 | bfd_vma *valp) | |
3b22753a L |
6225 | { |
6226 | asection *lcomm; | |
6227 | ||
6228 | switch (sym->st_shndx) | |
6229 | { | |
6230 | case SHN_X86_64_LCOMMON: | |
6231 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
6232 | if (lcomm == NULL) | |
6233 | { | |
6234 | lcomm = bfd_make_section_with_flags (abfd, | |
6235 | "LARGE_COMMON", | |
6236 | (SEC_ALLOC | |
6237 | | SEC_IS_COMMON | |
6238 | | SEC_LINKER_CREATED)); | |
6239 | if (lcomm == NULL) | |
6240 | return FALSE; | |
6241 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
6242 | } | |
6243 | *secp = lcomm; | |
6244 | *valp = sym->st_size; | |
c35bdf6e | 6245 | return TRUE; |
3b22753a | 6246 | } |
d8045f23 | 6247 | |
3b22753a L |
6248 | return TRUE; |
6249 | } | |
6250 | ||
6251 | ||
6252 | /* Given a BFD section, try to locate the corresponding ELF section | |
6253 | index. */ | |
6254 | ||
6255 | static bfd_boolean | |
351f65ca L |
6256 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
6257 | asection *sec, int *index_return) | |
3b22753a L |
6258 | { |
6259 | if (sec == &_bfd_elf_large_com_section) | |
6260 | { | |
91d6fa6a | 6261 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
6262 | return TRUE; |
6263 | } | |
6264 | return FALSE; | |
6265 | } | |
6266 | ||
6267 | /* Process a symbol. */ | |
6268 | ||
6269 | static void | |
351f65ca L |
6270 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
6271 | asymbol *asym) | |
3b22753a L |
6272 | { |
6273 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
6274 | ||
6275 | switch (elfsym->internal_elf_sym.st_shndx) | |
6276 | { | |
6277 | case SHN_X86_64_LCOMMON: | |
6278 | asym->section = &_bfd_elf_large_com_section; | |
6279 | asym->value = elfsym->internal_elf_sym.st_size; | |
6280 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
6281 | asym->flags &= ~BSF_GLOBAL; | |
6282 | break; | |
6283 | } | |
6284 | } | |
6285 | ||
6286 | static bfd_boolean | |
351f65ca | 6287 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
6288 | { |
6289 | return (sym->st_shndx == SHN_COMMON | |
6290 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
6291 | } | |
6292 | ||
6293 | static unsigned int | |
351f65ca | 6294 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
6295 | { |
6296 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
6297 | return SHN_COMMON; | |
6298 | else | |
6299 | return SHN_X86_64_LCOMMON; | |
6300 | } | |
6301 | ||
6302 | static asection * | |
351f65ca | 6303 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
6304 | { |
6305 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
6306 | return bfd_com_section_ptr; | |
6307 | else | |
6308 | return &_bfd_elf_large_com_section; | |
6309 | } | |
6310 | ||
6311 | static bfd_boolean | |
5d13b3b3 AM |
6312 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
6313 | const Elf_Internal_Sym *sym, | |
351f65ca | 6314 | asection **psec, |
5d13b3b3 AM |
6315 | bfd_boolean newdef, |
6316 | bfd_boolean olddef, | |
351f65ca | 6317 | bfd *oldbfd, |
5d13b3b3 | 6318 | const asection *oldsec) |
3b22753a L |
6319 | { |
6320 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
6321 | normal common symbol. We turn the large common symbol into a |
6322 | normal one. */ | |
5d13b3b3 | 6323 | if (!olddef |
3b22753a | 6324 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
6325 | && !newdef |
6326 | && bfd_is_com_section (*psec) | |
6327 | && oldsec != *psec) | |
3b22753a | 6328 | { |
00492999 | 6329 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 6330 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
6331 | { |
6332 | h->root.u.c.p->section | |
6333 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
6334 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
6335 | } | |
6336 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
6337 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
6338 | *psec = bfd_com_section_ptr; | |
3b22753a L |
6339 | } |
6340 | ||
6341 | return TRUE; | |
6342 | } | |
6343 | ||
6344 | static int | |
351f65ca L |
6345 | elf_x86_64_additional_program_headers (bfd *abfd, |
6346 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
6347 | { |
6348 | asection *s; | |
9a2e389a | 6349 | int count = 0; |
3b22753a L |
6350 | |
6351 | /* Check to see if we need a large readonly segment. */ | |
6352 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
6353 | if (s && (s->flags & SEC_LOAD)) | |
6354 | count++; | |
6355 | ||
6356 | /* Check to see if we need a large data segment. Since .lbss sections | |
6357 | is placed right after the .bss section, there should be no need for | |
6358 | a large data segment just because of .lbss. */ | |
6359 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
6360 | if (s && (s->flags & SEC_LOAD)) | |
6361 | count++; | |
6362 | ||
6363 | return count; | |
6364 | } | |
6365 | ||
c543bf9a L |
6366 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
6367 | ||
6368 | static bfd_boolean | |
6369 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
6370 | const bfd_target *output) | |
6371 | { | |
6372 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
6373 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
6374 | && _bfd_elf_relocs_compatible (input, output)); | |
6375 | } | |
6376 | ||
38b12349 L |
6377 | /* Set up x86-64 GNU properties. Return the first relocatable ELF input |
6378 | with GNU properties if found. Otherwise, return NULL. */ | |
6379 | ||
6380 | static bfd * | |
6381 | elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info) | |
6382 | { | |
6383 | bfd_boolean normal_target; | |
6384 | bfd_boolean lazy_plt; | |
6385 | asection *sec, *pltsec; | |
6386 | bfd *dynobj; | |
ee2fdd6f L |
6387 | bfd_boolean use_ibt_plt; |
6388 | unsigned int plt_alignment, features; | |
0afcef53 | 6389 | struct elf_x86_link_hash_table *htab; |
ee2fdd6f | 6390 | bfd *pbfd; |
73784fa5 L |
6391 | bfd *ebfd = NULL; |
6392 | elf_property *prop; | |
ee2fdd6f L |
6393 | |
6394 | features = 0; | |
6395 | if (info->ibt) | |
6396 | features = GNU_PROPERTY_X86_FEATURE_1_IBT; | |
48580982 L |
6397 | if (info->shstk) |
6398 | features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK; | |
ee2fdd6f | 6399 | |
73784fa5 L |
6400 | /* Find a normal input file with GNU property note. */ |
6401 | for (pbfd = info->input_bfds; | |
6402 | pbfd != NULL; | |
6403 | pbfd = pbfd->link.next) | |
6404 | if (bfd_get_flavour (pbfd) == bfd_target_elf_flavour | |
6405 | && bfd_count_sections (pbfd) != 0) | |
6406 | { | |
6407 | ebfd = pbfd; | |
6408 | ||
6409 | if (elf_properties (pbfd) != NULL) | |
6410 | break; | |
6411 | } | |
ee2fdd6f | 6412 | |
a5b4ee94 | 6413 | if (ebfd != NULL && features) |
73784fa5 | 6414 | { |
a5b4ee94 L |
6415 | /* If features is set, add GNU_PROPERTY_X86_FEATURE_1_IBT and |
6416 | GNU_PROPERTY_X86_FEATURE_1_SHSTK. */ | |
6417 | prop = _bfd_elf_get_property (ebfd, | |
6418 | GNU_PROPERTY_X86_FEATURE_1_AND, | |
6419 | 4); | |
6420 | prop->u.number |= features; | |
6421 | prop->pr_kind = property_number; | |
6422 | ||
6423 | /* Create the GNU property note section if needed. */ | |
6424 | if (pbfd == NULL) | |
ee2fdd6f | 6425 | { |
a5b4ee94 L |
6426 | sec = bfd_make_section_with_flags (ebfd, |
6427 | NOTE_GNU_PROPERTY_SECTION_NAME, | |
6428 | (SEC_ALLOC | |
6429 | | SEC_LOAD | |
6430 | | SEC_IN_MEMORY | |
6431 | | SEC_READONLY | |
6432 | | SEC_HAS_CONTENTS | |
6433 | | SEC_DATA)); | |
6434 | if (sec == NULL) | |
6435 | info->callbacks->einfo (_("%F: failed to create GNU property section\n")); | |
73784fa5 | 6436 | |
a5b4ee94 L |
6437 | if (!bfd_set_section_alignment (ebfd, sec, |
6438 | ABI_64_P (ebfd) ? 3 : 2)) | |
6439 | { | |
5d8763a3 | 6440 | error_alignment: |
a5b4ee94 L |
6441 | info->callbacks->einfo (_("%F%A: failed to align section\n"), |
6442 | sec); | |
73784fa5 | 6443 | } |
73784fa5 | 6444 | |
a5b4ee94 L |
6445 | elf_section_type (sec) = SHT_NOTE; |
6446 | } | |
ee2fdd6f L |
6447 | } |
6448 | ||
6449 | pbfd = _bfd_elf_link_setup_gnu_properties (info); | |
38b12349 L |
6450 | |
6451 | if (bfd_link_relocatable (info)) | |
6452 | return pbfd; | |
6453 | ||
0afcef53 | 6454 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
38b12349 L |
6455 | if (htab == NULL) |
6456 | return pbfd; | |
6457 | ||
ee2fdd6f L |
6458 | use_ibt_plt = info->ibtplt || info->ibt; |
6459 | if (!use_ibt_plt && pbfd != NULL) | |
6460 | { | |
6461 | /* Check if GNU_PROPERTY_X86_FEATURE_1_IBT is on. */ | |
6462 | elf_property_list *p; | |
6463 | ||
6464 | /* The property list is sorted in order of type. */ | |
6465 | for (p = elf_properties (pbfd); p; p = p->next) | |
6466 | { | |
6467 | if (GNU_PROPERTY_X86_FEATURE_1_AND == p->property.pr_type) | |
6468 | { | |
6469 | use_ibt_plt = !!(p->property.u.number | |
6470 | & GNU_PROPERTY_X86_FEATURE_1_IBT); | |
6471 | break; | |
6472 | } | |
6473 | else if (GNU_PROPERTY_X86_FEATURE_1_AND < p->property.pr_type) | |
6474 | break; | |
6475 | } | |
6476 | } | |
6477 | ||
38b12349 L |
6478 | dynobj = htab->elf.dynobj; |
6479 | ||
6480 | /* Set htab->elf.dynobj here so that there is no need to check and | |
6481 | set it in check_relocs. */ | |
6482 | if (dynobj == NULL) | |
6483 | { | |
ee2fdd6f L |
6484 | if (pbfd != NULL) |
6485 | { | |
6486 | htab->elf.dynobj = pbfd; | |
6487 | dynobj = pbfd; | |
6488 | } | |
6489 | else | |
6490 | { | |
6491 | bfd *abfd; | |
6492 | ||
6493 | /* Find a normal input file to hold linker created | |
6494 | sections. */ | |
6495 | for (abfd = info->input_bfds; | |
6496 | abfd != NULL; | |
6497 | abfd = abfd->link.next) | |
b7a18930 NC |
6498 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour |
6499 | && (abfd->flags | |
6500 | & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0) | |
ee2fdd6f L |
6501 | { |
6502 | htab->elf.dynobj = abfd; | |
6503 | dynobj = abfd; | |
6504 | break; | |
6505 | } | |
6506 | } | |
38b12349 L |
6507 | } |
6508 | ||
6509 | /* Even when lazy binding is disabled by "-z now", the PLT0 entry may | |
6510 | still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for | |
6511 | canonical function address. */ | |
765e526c | 6512 | htab->plt.has_plt0 = 1; |
38b12349 L |
6513 | |
6514 | if (get_elf_x86_64_backend_data (info->output_bfd)->os | |
6515 | == is_normal) | |
6516 | { | |
ee2fdd6f L |
6517 | if (use_ibt_plt) |
6518 | { | |
6519 | if (ABI_64_P (dynobj)) | |
6520 | { | |
765e526c | 6521 | htab->lazy_plt |
0afcef53 | 6522 | = &elf_x86_64_lazy_ibt_plt; |
765e526c | 6523 | htab->non_lazy_plt |
0afcef53 | 6524 | = &elf_x86_64_non_lazy_ibt_plt; |
ee2fdd6f L |
6525 | } |
6526 | else | |
6527 | { | |
765e526c | 6528 | htab->lazy_plt |
0afcef53 | 6529 | = &elf_x32_lazy_ibt_plt; |
765e526c | 6530 | htab->non_lazy_plt |
0afcef53 | 6531 | = &elf_x32_non_lazy_ibt_plt; |
ee2fdd6f L |
6532 | } |
6533 | } | |
6534 | else if (info->bndplt) | |
38b12349 | 6535 | { |
765e526c L |
6536 | htab->lazy_plt = &elf_x86_64_lazy_bnd_plt; |
6537 | htab->non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt; | |
38b12349 L |
6538 | } |
6539 | else | |
6540 | { | |
765e526c L |
6541 | htab->lazy_plt = &elf_x86_64_lazy_plt; |
6542 | htab->non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
38b12349 L |
6543 | } |
6544 | normal_target = TRUE; | |
6545 | } | |
6546 | else | |
6547 | { | |
765e526c L |
6548 | htab->lazy_plt = &elf_x86_64_nacl_plt; |
6549 | htab->non_lazy_plt = NULL; | |
38b12349 L |
6550 | normal_target = FALSE; |
6551 | } | |
6552 | ||
6553 | pltsec = htab->elf.splt; | |
6554 | ||
6555 | /* If the non-lazy PLT is available, use it for all PLT entries if | |
6556 | there are no PLT0 or no .plt section. */ | |
765e526c L |
6557 | if (htab->non_lazy_plt != NULL |
6558 | && (!htab->plt.has_plt0 || pltsec == NULL)) | |
38b12349 L |
6559 | { |
6560 | lazy_plt = FALSE; | |
765e526c L |
6561 | htab->plt.plt_entry = htab->non_lazy_plt->plt_entry; |
6562 | htab->plt.plt_entry_size = htab->non_lazy_plt->plt_entry_size; | |
6563 | htab->plt.plt_got_offset = htab->non_lazy_plt->plt_got_offset; | |
6564 | htab->plt.plt_got_insn_size | |
6565 | = htab->non_lazy_plt->plt_got_insn_size; | |
6566 | htab->plt.eh_frame_plt_size | |
6567 | = htab->non_lazy_plt->eh_frame_plt_size; | |
6568 | htab->plt.eh_frame_plt = htab->non_lazy_plt->eh_frame_plt; | |
38b12349 L |
6569 | } |
6570 | else | |
6571 | { | |
6572 | lazy_plt = TRUE; | |
765e526c L |
6573 | htab->plt.plt_entry = htab->lazy_plt->plt_entry; |
6574 | htab->plt.plt_entry_size = htab->lazy_plt->plt_entry_size; | |
6575 | htab->plt.plt_got_offset = htab->lazy_plt->plt_got_offset; | |
6576 | htab->plt.plt_got_insn_size | |
6577 | = htab->lazy_plt->plt_got_insn_size; | |
6578 | htab->plt.eh_frame_plt_size | |
6579 | = htab->lazy_plt->eh_frame_plt_size; | |
6580 | htab->plt.eh_frame_plt = htab->lazy_plt->eh_frame_plt; | |
38b12349 L |
6581 | } |
6582 | ||
765e526c L |
6583 | /* This is unused for x86-64. */ |
6584 | htab->plt.plt0_entry = NULL; | |
6585 | ||
38b12349 L |
6586 | /* Return if there are no normal input files. */ |
6587 | if (dynobj == NULL) | |
6588 | return pbfd; | |
6589 | ||
6590 | /* Since create_dynamic_sections isn't always called, but GOT | |
6591 | relocations need GOT relocations, create them here so that we | |
6592 | don't need to do it in check_relocs. */ | |
6593 | if (htab->elf.sgot == NULL | |
6594 | && !_bfd_elf_create_got_section (dynobj, info)) | |
6595 | info->callbacks->einfo (_("%F: failed to create GOT sections\n")); | |
6596 | ||
6597 | /* Align .got and .got.plt sections to their entry size. Do it here | |
6598 | instead of in create_dynamic_sections so that they are always | |
6599 | properly aligned even if create_dynamic_sections isn't called. */ | |
6600 | sec = htab->elf.sgot; | |
6601 | if (!bfd_set_section_alignment (dynobj, sec, 3)) | |
5d8763a3 | 6602 | goto error_alignment; |
38b12349 L |
6603 | |
6604 | sec = htab->elf.sgotplt; | |
6605 | if (!bfd_set_section_alignment (dynobj, sec, 3)) | |
6606 | goto error_alignment; | |
6607 | ||
6608 | /* Create the ifunc sections here so that check_relocs can be | |
6609 | simplified. */ | |
6610 | if (!_bfd_elf_create_ifunc_sections (dynobj, info)) | |
6611 | info->callbacks->einfo (_("%F: failed to create ifunc sections\n")); | |
6612 | ||
765e526c | 6613 | plt_alignment = bfd_log2 (htab->plt.plt_entry_size); |
38b12349 L |
6614 | |
6615 | if (pltsec != NULL) | |
6616 | { | |
6617 | /* Whe creating executable, set the contents of the .interp | |
6618 | section to the interpreter. */ | |
6619 | if (bfd_link_executable (info) && !info->nointerp) | |
6620 | { | |
6621 | asection *s = bfd_get_linker_section (dynobj, ".interp"); | |
6622 | if (s == NULL) | |
6623 | abort (); | |
6624 | s->size = htab->dynamic_interpreter_size; | |
6625 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
6626 | htab->interp = s; | |
6627 | } | |
6628 | ||
6629 | /* Don't change PLT section alignment for NaCl since it uses | |
6630 | 64-byte PLT entry and sets PLT section alignment to 32 | |
6631 | bytes. Don't create additional PLT sections for NaCl. */ | |
6632 | if (normal_target) | |
6633 | { | |
6634 | const struct elf_backend_data *bed | |
6635 | = get_elf_backend_data (dynobj); | |
6636 | flagword pltflags = (bed->dynamic_sec_flags | |
6637 | | SEC_ALLOC | |
6638 | | SEC_CODE | |
6639 | | SEC_LOAD | |
6640 | | SEC_READONLY); | |
6641 | unsigned int non_lazy_plt_alignment | |
765e526c | 6642 | = bfd_log2 (htab->non_lazy_plt->plt_entry_size); |
38b12349 L |
6643 | |
6644 | sec = pltsec; | |
6645 | if (!bfd_set_section_alignment (sec->owner, sec, | |
6646 | plt_alignment)) | |
6647 | goto error_alignment; | |
6648 | ||
6649 | /* Create the GOT procedure linkage table. */ | |
6650 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
6651 | ".plt.got", | |
6652 | pltflags); | |
6653 | if (sec == NULL) | |
6654 | info->callbacks->einfo (_("%F: failed to create GOT PLT section\n")); | |
6655 | ||
6656 | if (!bfd_set_section_alignment (dynobj, sec, | |
6657 | non_lazy_plt_alignment)) | |
6658 | goto error_alignment; | |
6659 | ||
6660 | htab->plt_got = sec; | |
6661 | ||
ee2fdd6f | 6662 | if (lazy_plt) |
38b12349 | 6663 | { |
ee2fdd6f L |
6664 | sec = NULL; |
6665 | ||
6666 | if (use_ibt_plt) | |
6667 | { | |
6668 | /* Create the second PLT for Intel IBT support. IBT | |
6669 | PLT is supported only for non-NaCl target and is | |
6670 | is needed only for lazy binding. */ | |
6671 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
6672 | ".plt.sec", | |
6673 | pltflags); | |
6674 | if (sec == NULL) | |
6675 | info->callbacks->einfo (_("%F: failed to create IBT-enabled PLT section\n")); | |
6676 | ||
6677 | if (!bfd_set_section_alignment (dynobj, sec, | |
6678 | plt_alignment)) | |
6679 | goto error_alignment; | |
6680 | } | |
6681 | else if (info->bndplt && ABI_64_P (dynobj)) | |
6682 | { | |
6683 | /* Create the second PLT for Intel MPX support. MPX | |
6684 | PLT is supported only for non-NaCl target in 64-bit | |
6685 | mode and is needed only for lazy binding. */ | |
6686 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
6687 | ".plt.sec", | |
6688 | pltflags); | |
6689 | if (sec == NULL) | |
6690 | info->callbacks->einfo (_("%F: failed to create BND PLT section\n")); | |
6691 | ||
6692 | if (!bfd_set_section_alignment (dynobj, sec, | |
6693 | non_lazy_plt_alignment)) | |
6694 | goto error_alignment; | |
6695 | } | |
38b12349 | 6696 | |
f2c29a16 | 6697 | htab->plt_second = sec; |
38b12349 L |
6698 | } |
6699 | } | |
6700 | ||
6701 | if (!info->no_ld_generated_unwind_info) | |
6702 | { | |
6703 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | |
6704 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
6705 | | SEC_LINKER_CREATED); | |
6706 | ||
6707 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
6708 | ".eh_frame", | |
6709 | flags); | |
6710 | if (sec == NULL) | |
6711 | info->callbacks->einfo (_("%F: failed to create PLT .eh_frame section\n")); | |
6712 | ||
6713 | if (!bfd_set_section_alignment (dynobj, sec, | |
6714 | ABI_64_P (dynobj) ? 3 : 2)) | |
6715 | goto error_alignment; | |
6716 | ||
6717 | htab->plt_eh_frame = sec; | |
6718 | ||
6719 | if (htab->plt_got != NULL) | |
6720 | { | |
6721 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
6722 | ".eh_frame", | |
6723 | flags); | |
6724 | if (sec == NULL) | |
6725 | info->callbacks->einfo (_("%F: failed to create GOT PLT .eh_frame section\n")); | |
6726 | ||
6727 | if (!bfd_set_section_alignment (dynobj, sec, | |
6728 | ABI_64_P (dynobj) ? 3 : 2)) | |
6729 | goto error_alignment; | |
6730 | ||
6731 | htab->plt_got_eh_frame = sec; | |
6732 | } | |
6733 | ||
f2c29a16 | 6734 | if (htab->plt_second != NULL) |
38b12349 L |
6735 | { |
6736 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
6737 | ".eh_frame", | |
6738 | flags); | |
6739 | if (sec == NULL) | |
6740 | info->callbacks->einfo (_("%F: failed to create BND PLT .eh_frame section\n")); | |
6741 | ||
6742 | if (!bfd_set_section_alignment (dynobj, sec, 3)) | |
6743 | goto error_alignment; | |
6744 | ||
f2c29a16 | 6745 | htab->plt_second_eh_frame = sec; |
38b12349 L |
6746 | } |
6747 | } | |
6748 | } | |
6749 | ||
6750 | if (normal_target) | |
6751 | { | |
6752 | /* The .iplt section is used for IFUNC symbols in static | |
6753 | executables. */ | |
6754 | sec = htab->elf.iplt; | |
6755 | if (sec != NULL | |
6756 | && !bfd_set_section_alignment (sec->owner, sec, | |
6757 | plt_alignment)) | |
6758 | goto error_alignment; | |
6759 | } | |
6760 | ||
6761 | return pbfd; | |
6762 | } | |
6763 | ||
9a2e389a | 6764 | static const struct bfd_elf_special_section |
46bed679 | 6765 | elf_x86_64_special_sections[]= |
3b22753a | 6766 | { |
0112cd26 NC |
6767 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
6768 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
6769 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
6770 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
6771 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
6772 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
6773 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
6774 | }; |
6775 | ||
6d00b590 | 6776 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
6777 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
6778 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 6779 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 6780 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 6781 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 6782 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 6783 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
6784 | |
6785 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 6786 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
6787 | #define elf_backend_want_got_plt 1 |
6788 | #define elf_backend_plt_readonly 1 | |
6789 | #define elf_backend_want_plt_sym 0 | |
6790 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 6791 | #define elf_backend_rela_normal 1 |
e41b3a13 | 6792 | #define elf_backend_plt_alignment 4 |
f7483970 | 6793 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 6794 | #define elf_backend_caches_rawsize 1 |
64f52338 | 6795 | #define elf_backend_dtrel_excludes_plt 1 |
5474d94f | 6796 | #define elf_backend_want_dynrelro 1 |
70256ad8 | 6797 | |
351f65ca | 6798 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 6799 | |
351f65ca | 6800 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 6801 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 6802 | elf_x86_64_reloc_name_lookup |
70256ad8 | 6803 | |
351f65ca | 6804 | #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol |
c543bf9a | 6805 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca | 6806 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
38b12349 | 6807 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
351f65ca L |
6808 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections |
6809 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
233cc9c1 | 6810 | #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms |
351f65ca | 6811 | #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook |
351f65ca L |
6812 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus |
6813 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
6814 | #ifdef CORE_HEADER |
6815 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
6816 | #endif | |
351f65ca L |
6817 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
6818 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
6819 | #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections | |
74541ad4 | 6820 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 6821 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
351f65ca | 6822 | #define bfd_elf64_mkobject elf_x86_64_mkobject |
0ff2b86e | 6823 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 6824 | |
d2b2c203 | 6825 | #define elf_backend_section_from_shdr \ |
351f65ca | 6826 | elf_x86_64_section_from_shdr |
d2b2c203 | 6827 | |
3b22753a | 6828 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 6829 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 6830 | #define elf_backend_add_symbol_hook \ |
351f65ca | 6831 | elf_x86_64_add_symbol_hook |
3b22753a | 6832 | #define elf_backend_symbol_processing \ |
351f65ca | 6833 | elf_x86_64_symbol_processing |
3b22753a | 6834 | #define elf_backend_common_section_index \ |
351f65ca | 6835 | elf_x86_64_common_section_index |
3b22753a | 6836 | #define elf_backend_common_section \ |
351f65ca | 6837 | elf_x86_64_common_section |
3b22753a | 6838 | #define elf_backend_common_definition \ |
351f65ca | 6839 | elf_x86_64_common_definition |
3b22753a | 6840 | #define elf_backend_merge_symbol \ |
351f65ca | 6841 | elf_x86_64_merge_symbol |
3b22753a | 6842 | #define elf_backend_special_sections \ |
351f65ca | 6843 | elf_x86_64_special_sections |
3b22753a | 6844 | #define elf_backend_additional_program_headers \ |
351f65ca | 6845 | elf_x86_64_additional_program_headers |
38b12349 L |
6846 | #define elf_backend_setup_gnu_properties \ |
6847 | elf_x86_64_link_setup_gnu_properties | |
3b22753a | 6848 | |
8d88c4ca | 6849 | #include "elf64-target.h" |
9d7cbccd | 6850 | |
6036f486 ES |
6851 | /* CloudABI support. */ |
6852 | ||
6853 | #undef TARGET_LITTLE_SYM | |
6854 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec | |
6855 | #undef TARGET_LITTLE_NAME | |
6856 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" | |
6857 | ||
6858 | #undef ELF_OSABI | |
6859 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
6860 | ||
6861 | #undef elf64_bed | |
6862 | #define elf64_bed elf64_x86_64_cloudabi_bed | |
6863 | ||
6864 | #include "elf64-target.h" | |
6865 | ||
9d7cbccd NC |
6866 | /* FreeBSD support. */ |
6867 | ||
6868 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6869 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
9d7cbccd NC |
6870 | #undef TARGET_LITTLE_NAME |
6871 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
6872 | ||
d1036acb L |
6873 | #undef ELF_OSABI |
6874 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 6875 | |
9d7cbccd NC |
6876 | #undef elf64_bed |
6877 | #define elf64_bed elf64_x86_64_fbsd_bed | |
6878 | ||
6879 | #include "elf64-target.h" | |
8a9036a4 | 6880 | |
a6cc6b3b RO |
6881 | /* Solaris 2 support. */ |
6882 | ||
6883 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6884 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
6885 | #undef TARGET_LITTLE_NAME |
6886 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
6887 | ||
6888 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
6889 | objects won't be recognized. */ | |
6890 | #undef ELF_OSABI | |
6891 | ||
6892 | #undef elf64_bed | |
6893 | #define elf64_bed elf64_x86_64_sol2_bed | |
6894 | ||
7dc98aea RO |
6895 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
6896 | boundary. */ | |
84865015 | 6897 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
6898 | #define elf_backend_static_tls_alignment 16 |
6899 | ||
a6cc6b3b RO |
6900 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
6901 | ||
6902 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
6903 | File, p.63. */ | |
84865015 | 6904 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
6905 | #define elf_backend_want_plt_sym 1 |
6906 | ||
84865015 NC |
6907 | #undef elf_backend_strtab_flags |
6908 | #define elf_backend_strtab_flags SHF_STRINGS | |
6909 | ||
6910 | static bfd_boolean | |
5522f910 NC |
6911 | elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
6912 | bfd *obfd ATTRIBUTE_UNUSED, | |
6913 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
6914 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
6915 | { |
6916 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
6917 | and sh_link fields of Solaris specific section types. */ | |
6918 | return FALSE; | |
6919 | } | |
6920 | ||
5522f910 NC |
6921 | #undef elf_backend_copy_special_section_fields |
6922 | #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields | |
84865015 | 6923 | |
a6cc6b3b RO |
6924 | #include "elf64-target.h" |
6925 | ||
8059fb19 RM |
6926 | /* Native Client support. */ |
6927 | ||
64b384e1 RM |
6928 | static bfd_boolean |
6929 | elf64_x86_64_nacl_elf_object_p (bfd *abfd) | |
6930 | { | |
6931 | /* Set the right machine number for a NaCl x86-64 ELF64 file. */ | |
6932 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl); | |
6933 | return TRUE; | |
6934 | } | |
6935 | ||
8059fb19 | 6936 | #undef TARGET_LITTLE_SYM |
6d00b590 | 6937 | #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec |
8059fb19 RM |
6938 | #undef TARGET_LITTLE_NAME |
6939 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
6940 | #undef elf64_bed | |
6941 | #define elf64_bed elf64_x86_64_nacl_bed | |
6942 | ||
6943 | #undef ELF_MAXPAGESIZE | |
6944 | #undef ELF_MINPAGESIZE | |
6945 | #undef ELF_COMMONPAGESIZE | |
6946 | #define ELF_MAXPAGESIZE 0x10000 | |
6947 | #define ELF_MINPAGESIZE 0x10000 | |
6948 | #define ELF_COMMONPAGESIZE 0x10000 | |
6949 | ||
6950 | /* Restore defaults. */ | |
6951 | #undef ELF_OSABI | |
6952 | #undef elf_backend_static_tls_alignment | |
6953 | #undef elf_backend_want_plt_sym | |
6954 | #define elf_backend_want_plt_sym 0 | |
84865015 | 6955 | #undef elf_backend_strtab_flags |
5522f910 | 6956 | #undef elf_backend_copy_special_section_fields |
8059fb19 RM |
6957 | |
6958 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
6959 | ||
6960 | #undef elf_backend_plt_alignment | |
6961 | #define elf_backend_plt_alignment 5 | |
6962 | #define NACL_PLT_ENTRY_SIZE 64 | |
6963 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
6964 | ||
6965 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
6966 | { | |
6967 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
6968 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ | |
6969 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
6970 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
6971 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
6972 | ||
ea2d813e | 6973 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
70cc877f | 6974 | 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */ |
ea2d813e RM |
6975 | |
6976 | /* 32 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 6977 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 6978 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 6979 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 6980 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 6981 | 0x66, /* excess data16 prefix */ |
ea2d813e | 6982 | 0x90 /* nop */ |
8059fb19 RM |
6983 | }; |
6984 | ||
6985 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6986 | { | |
6987 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
6988 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
6989 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
6990 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
6991 | ||
6992 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
3ddf1bdd | 6993 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
6994 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
6995 | ||
6996 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6997 | 0x68, /* pushq immediate */ | |
6998 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
6999 | 0xe9, /* jmp relative */ | |
7000 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
7001 | ||
7002 | /* 22 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 7003 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
7004 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
7005 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ | |
7006 | }; | |
7007 | ||
7008 | /* .eh_frame covering the .plt section. */ | |
7009 | ||
7010 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
7011 | { | |
7012 | #if (PLT_CIE_LENGTH != 20 \ | |
7013 | || PLT_FDE_LENGTH != 36 \ | |
7014 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
7015 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
7016 | # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!" | |
7017 | #endif | |
7018 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
7019 | 0, 0, 0, 0, /* CIE ID */ | |
7020 | 1, /* CIE version */ | |
7021 | 'z', 'R', 0, /* Augmentation string */ | |
7022 | 1, /* Code alignment factor */ | |
7023 | 0x78, /* Data alignment factor */ | |
7024 | 16, /* Return address column */ | |
7025 | 1, /* Augmentation size */ | |
7026 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
7027 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
7028 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
7029 | DW_CFA_nop, DW_CFA_nop, | |
7030 | ||
7031 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
7032 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
7033 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
7034 | 0, 0, 0, 0, /* .plt size goes here */ | |
7035 | 0, /* Augmentation size */ | |
7036 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
7037 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
7038 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
7039 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
7040 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
7041 | 13, /* Block length */ | |
7042 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
7043 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
7044 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
7045 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
7046 | DW_CFA_nop, DW_CFA_nop | |
7047 | }; | |
7048 | ||
765e526c | 7049 | static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt = |
8059fb19 RM |
7050 | { |
7051 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ | |
765e526c | 7052 | NACL_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
8059fb19 RM |
7053 | elf_x86_64_nacl_plt_entry, /* plt_entry */ |
7054 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
7055 | 2, /* plt0_got1_offset */ | |
7056 | 9, /* plt0_got2_offset */ | |
7057 | 13, /* plt0_got2_insn_end */ | |
7058 | 3, /* plt_got_offset */ | |
7059 | 33, /* plt_reloc_offset */ | |
7060 | 38, /* plt_plt_offset */ | |
7061 | 7, /* plt_got_insn_size */ | |
7062 | 42, /* plt_plt_insn_end */ | |
7063 | 32, /* plt_lazy_offset */ | |
765e526c L |
7064 | NULL, /* pic_plt0_entry */ |
7065 | NULL, /* pic_plt_entry */ | |
8059fb19 | 7066 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ |
38b12349 L |
7067 | sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */ |
7068 | }; | |
7069 | ||
7070 | static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed = | |
7071 | { | |
7072 | is_nacl /* os */ | |
8059fb19 RM |
7073 | }; |
7074 | ||
7075 | #undef elf_backend_arch_data | |
7076 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
7077 | ||
64b384e1 RM |
7078 | #undef elf_backend_object_p |
7079 | #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p | |
5a68afcf RM |
7080 | #undef elf_backend_modify_segment_map |
7081 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
7082 | #undef elf_backend_modify_program_headers | |
7083 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
7084 | #undef elf_backend_final_write_processing |
7085 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 7086 | |
8059fb19 RM |
7087 | #include "elf64-target.h" |
7088 | ||
7089 | /* Native Client x32 support. */ | |
7090 | ||
64b384e1 RM |
7091 | static bfd_boolean |
7092 | elf32_x86_64_nacl_elf_object_p (bfd *abfd) | |
7093 | { | |
7094 | /* Set the right machine number for a NaCl x86-64 ELF32 file. */ | |
7095 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl); | |
7096 | return TRUE; | |
7097 | } | |
7098 | ||
8059fb19 | 7099 | #undef TARGET_LITTLE_SYM |
6d00b590 | 7100 | #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec |
8059fb19 RM |
7101 | #undef TARGET_LITTLE_NAME |
7102 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" | |
7103 | #undef elf32_bed | |
7104 | #define elf32_bed elf32_x86_64_nacl_bed | |
7105 | ||
8059fb19 RM |
7106 | #define bfd_elf32_bfd_reloc_type_lookup \ |
7107 | elf_x86_64_reloc_type_lookup | |
7108 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
7109 | elf_x86_64_reloc_name_lookup | |
7110 | #define bfd_elf32_mkobject \ | |
7111 | elf_x86_64_mkobject | |
b7365e5d L |
7112 | #define bfd_elf32_get_synthetic_symtab \ |
7113 | elf_x86_64_get_synthetic_symtab | |
8059fb19 RM |
7114 | |
7115 | #undef elf_backend_object_p | |
7116 | #define elf_backend_object_p \ | |
64b384e1 | 7117 | elf32_x86_64_nacl_elf_object_p |
8059fb19 RM |
7118 | |
7119 | #undef elf_backend_bfd_from_remote_memory | |
7120 | #define elf_backend_bfd_from_remote_memory \ | |
7121 | _bfd_elf32_bfd_from_remote_memory | |
7122 | ||
7123 | #undef elf_backend_size_info | |
7124 | #define elf_backend_size_info \ | |
7125 | _bfd_elf32_size_info | |
7126 | ||
7127 | #include "elf32-target.h" | |
7128 | ||
7129 | /* Restore defaults. */ | |
5a68afcf | 7130 | #undef elf_backend_object_p |
8059fb19 | 7131 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
7132 | #undef elf_backend_bfd_from_remote_memory |
7133 | #undef elf_backend_size_info | |
7134 | #undef elf_backend_modify_segment_map | |
7135 | #undef elf_backend_modify_program_headers | |
887badb3 | 7136 | #undef elf_backend_final_write_processing |
8059fb19 | 7137 | |
8a9036a4 L |
7138 | /* Intel L1OM support. */ |
7139 | ||
7140 | static bfd_boolean | |
7141 | elf64_l1om_elf_object_p (bfd *abfd) | |
7142 | { | |
7143 | /* Set the right machine number for an L1OM elf64 file. */ | |
7144 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
7145 | return TRUE; | |
7146 | } | |
7147 | ||
7148 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7149 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
7150 | #undef TARGET_LITTLE_NAME |
7151 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
7152 | #undef ELF_ARCH | |
7153 | #define ELF_ARCH bfd_arch_l1om | |
7154 | ||
7155 | #undef ELF_MACHINE_CODE | |
7156 | #define ELF_MACHINE_CODE EM_L1OM | |
7157 | ||
7158 | #undef ELF_OSABI | |
7159 | ||
7160 | #undef elf64_bed | |
7161 | #define elf64_bed elf64_l1om_bed | |
7162 | ||
7163 | #undef elf_backend_object_p | |
7164 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
7165 | ||
8059fb19 RM |
7166 | /* Restore defaults. */ |
7167 | #undef ELF_MAXPAGESIZE | |
7168 | #undef ELF_MINPAGESIZE | |
7169 | #undef ELF_COMMONPAGESIZE | |
7170 | #define ELF_MAXPAGESIZE 0x200000 | |
7171 | #define ELF_MINPAGESIZE 0x1000 | |
7172 | #define ELF_COMMONPAGESIZE 0x1000 | |
7173 | #undef elf_backend_plt_alignment | |
7174 | #define elf_backend_plt_alignment 4 | |
7175 | #undef elf_backend_arch_data | |
7176 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 7177 | |
8a9036a4 L |
7178 | #include "elf64-target.h" |
7179 | ||
7180 | /* FreeBSD L1OM support. */ | |
7181 | ||
7182 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7183 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
7184 | #undef TARGET_LITTLE_NAME |
7185 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
7186 | ||
7187 | #undef ELF_OSABI | |
7188 | #define ELF_OSABI ELFOSABI_FREEBSD | |
7189 | ||
7190 | #undef elf64_bed | |
7191 | #define elf64_bed elf64_l1om_fbsd_bed | |
7192 | ||
8a9036a4 | 7193 | #include "elf64-target.h" |
351f65ca | 7194 | |
7a9068fe L |
7195 | /* Intel K1OM support. */ |
7196 | ||
7197 | static bfd_boolean | |
7198 | elf64_k1om_elf_object_p (bfd *abfd) | |
7199 | { | |
7200 | /* Set the right machine number for an K1OM elf64 file. */ | |
7201 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
7202 | return TRUE; | |
7203 | } | |
7204 | ||
7205 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7206 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
7207 | #undef TARGET_LITTLE_NAME |
7208 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
7209 | #undef ELF_ARCH | |
7210 | #define ELF_ARCH bfd_arch_k1om | |
7211 | ||
7212 | #undef ELF_MACHINE_CODE | |
7213 | #define ELF_MACHINE_CODE EM_K1OM | |
7214 | ||
7215 | #undef ELF_OSABI | |
7216 | ||
7217 | #undef elf64_bed | |
7218 | #define elf64_bed elf64_k1om_bed | |
7219 | ||
7220 | #undef elf_backend_object_p | |
7221 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
7222 | ||
7223 | #undef elf_backend_static_tls_alignment | |
7224 | ||
7225 | #undef elf_backend_want_plt_sym | |
7226 | #define elf_backend_want_plt_sym 0 | |
7227 | ||
7228 | #include "elf64-target.h" | |
7229 | ||
7230 | /* FreeBSD K1OM support. */ | |
7231 | ||
7232 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7233 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
7234 | #undef TARGET_LITTLE_NAME |
7235 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
7236 | ||
7237 | #undef ELF_OSABI | |
7238 | #define ELF_OSABI ELFOSABI_FREEBSD | |
7239 | ||
7240 | #undef elf64_bed | |
7241 | #define elf64_bed elf64_k1om_fbsd_bed | |
7242 | ||
7243 | #include "elf64-target.h" | |
7244 | ||
351f65ca L |
7245 | /* 32bit x86-64 support. */ |
7246 | ||
351f65ca | 7247 | #undef TARGET_LITTLE_SYM |
6d00b590 | 7248 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
7249 | #undef TARGET_LITTLE_NAME |
7250 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 7251 | #undef elf32_bed |
351f65ca L |
7252 | |
7253 | #undef ELF_ARCH | |
7254 | #define ELF_ARCH bfd_arch_i386 | |
7255 | ||
7256 | #undef ELF_MACHINE_CODE | |
7257 | #define ELF_MACHINE_CODE EM_X86_64 | |
7258 | ||
351f65ca L |
7259 | #undef ELF_OSABI |
7260 | ||
351f65ca L |
7261 | #undef elf_backend_object_p |
7262 | #define elf_backend_object_p \ | |
7263 | elf32_x86_64_elf_object_p | |
7264 | ||
7265 | #undef elf_backend_bfd_from_remote_memory | |
7266 | #define elf_backend_bfd_from_remote_memory \ | |
7267 | _bfd_elf32_bfd_from_remote_memory | |
7268 | ||
7269 | #undef elf_backend_size_info | |
7270 | #define elf_backend_size_info \ | |
7271 | _bfd_elf32_size_info | |
7272 | ||
7273 | #include "elf32-target.h" |