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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 | |
8d88c4ca | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
c434dee6 | 24 | #include "bfdlink.h" |
8d88c4ca NC |
25 | #include "libbfd.h" |
26 | #include "elf-bfd.h" | |
5a68afcf | 27 | #include "elf-nacl.h" |
142411ca | 28 | #include "bfd_stdint.h" |
c25bc9fc L |
29 | #include "objalloc.h" |
30 | #include "hashtab.h" | |
e41b3a13 | 31 | #include "dwarf2.h" |
d7921315 | 32 | #include "libiberty.h" |
8d88c4ca | 33 | |
56ceb5b5 | 34 | #include "opcode/i386.h" |
8d88c4ca NC |
35 | #include "elf/x86-64.h" |
36 | ||
8fd79e71 L |
37 | #ifdef CORE_HEADER |
38 | #include <stdarg.h> | |
39 | #include CORE_HEADER | |
40 | #endif | |
41 | ||
8d88c4ca NC |
42 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
43 | #define MINUS_ONE (~ (bfd_vma) 0) | |
44 | ||
351f65ca L |
45 | /* Since both 32-bit and 64-bit x86-64 encode relocation type in the |
46 | identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get | |
47 | relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE | |
48 | since they are the same. */ | |
49 | ||
50 | #define ABI_64_P(abfd) \ | |
51 | (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64) | |
52 | ||
8d88c4ca | 53 | /* The relocation "howto" table. Order of fields: |
7b81dfbb AJ |
54 | type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow, |
55 | special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */ | |
70256ad8 AJ |
56 | static reloc_howto_type x86_64_elf_howto_table[] = |
57 | { | |
6346d5ca | 58 | HOWTO(R_X86_64_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont, |
b34976b6 AM |
59 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, |
60 | FALSE), | |
61 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
62 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, | |
63 | FALSE), | |
64 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
65 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, | |
66 | TRUE), | |
67 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
68 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, | |
69 | FALSE), | |
70 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
71 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, | |
72 | TRUE), | |
73 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
74 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, | |
75 | FALSE), | |
76 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
77 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, | |
78 | MINUS_ONE, FALSE), | |
79 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
80 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, | |
81 | MINUS_ONE, FALSE), | |
82 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
83 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, | |
84 | MINUS_ONE, FALSE), | |
85 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
86 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, | |
87 | 0xffffffff, TRUE), | |
88 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, | |
89 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
90 | FALSE), | |
91 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
92 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, | |
93 | FALSE), | |
94 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
95 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), | |
b0360d8c | 96 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
b34976b6 | 97 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), |
ac2aa337 | 98 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
b34976b6 AM |
99 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), |
100 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
101 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), | |
102 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
103 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, | |
104 | MINUS_ONE, FALSE), | |
105 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
106 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, | |
107 | MINUS_ONE, FALSE), | |
108 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
109 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, | |
110 | MINUS_ONE, FALSE), | |
111 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
112 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, | |
113 | 0xffffffff, TRUE), | |
114 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
115 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, | |
116 | 0xffffffff, TRUE), | |
ac2aa337 | 117 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
b34976b6 AM |
118 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, |
119 | 0xffffffff, FALSE), | |
120 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
121 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, | |
122 | 0xffffffff, TRUE), | |
123 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
124 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, | |
125 | 0xffffffff, FALSE), | |
d6ab8113 JB |
126 | HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
127 | bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE, | |
128 | TRUE), | |
129 | HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
130 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", | |
131 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
132 | HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
133 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", | |
134 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
7b81dfbb AJ |
135 | HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, |
136 | bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE, | |
137 | FALSE), | |
138 | HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
139 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE, | |
140 | MINUS_ONE, TRUE), | |
141 | HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
142 | bfd_elf_generic_reloc, "R_X86_64_GOTPC64", | |
143 | FALSE, MINUS_ONE, MINUS_ONE, TRUE), | |
144 | HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
145 | bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE, | |
146 | MINUS_ONE, FALSE), | |
147 | HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
148 | bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE, | |
149 | MINUS_ONE, FALSE), | |
1788fc08 L |
150 | HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, |
151 | bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff, | |
152 | FALSE), | |
153 | HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned, | |
154 | bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE, | |
155 | FALSE), | |
67a4f2b7 AO |
156 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0, |
157 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
158 | "R_X86_64_GOTPC32_TLSDESC", | |
159 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
160 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0, | |
161 | complain_overflow_dont, bfd_elf_generic_reloc, | |
162 | "R_X86_64_TLSDESC_CALL", | |
163 | FALSE, 0, 0, FALSE), | |
164 | HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0, | |
165 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
166 | "R_X86_64_TLSDESC", | |
167 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
cbe950e9 L |
168 | HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
169 | bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE, | |
170 | MINUS_ONE, FALSE), | |
64d25c44 L |
171 | HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
172 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE, | |
173 | MINUS_ONE, FALSE), | |
c3320543 L |
174 | HOWTO(R_X86_64_PC32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
175 | bfd_elf_generic_reloc, "R_X86_64_PC32_BND", FALSE, 0xffffffff, 0xffffffff, | |
176 | TRUE), | |
177 | HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
178 | bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", FALSE, 0xffffffff, 0xffffffff, | |
179 | TRUE), | |
56ceb5b5 L |
180 | HOWTO(R_X86_64_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
181 | bfd_elf_generic_reloc, "R_X86_64_GOTPCRELX", FALSE, 0xffffffff, | |
182 | 0xffffffff, TRUE), | |
183 | HOWTO(R_X86_64_REX_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
184 | bfd_elf_generic_reloc, "R_X86_64_REX_GOTPCRELX", FALSE, 0xffffffff, | |
185 | 0xffffffff, TRUE), | |
fe4770f4 | 186 | |
a33d77bc JB |
187 | /* We have a gap in the reloc numbers here. |
188 | R_X86_64_standard counts the number up to this point, and | |
189 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
190 | R_X86_64_GNU_VT* to form an index into this table. */ | |
56ceb5b5 | 191 | #define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1) |
a33d77bc JB |
192 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
193 | ||
fe4770f4 | 194 | /* GNU extension to record C++ vtable hierarchy. */ |
b34976b6 AM |
195 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
196 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
197 | |
198 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
199 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
200 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
d7921315 L |
201 | FALSE), |
202 | ||
203 | /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */ | |
204 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
205 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
206 | FALSE) | |
8d88c4ca NC |
207 | }; |
208 | ||
d8045f23 NC |
209 | #define IS_X86_64_PCREL_TYPE(TYPE) \ |
210 | ( ((TYPE) == R_X86_64_PC8) \ | |
211 | || ((TYPE) == R_X86_64_PC16) \ | |
212 | || ((TYPE) == R_X86_64_PC32) \ | |
c3320543 | 213 | || ((TYPE) == R_X86_64_PC32_BND) \ |
d8045f23 NC |
214 | || ((TYPE) == R_X86_64_PC64)) |
215 | ||
8d88c4ca | 216 | /* Map BFD relocs to the x86_64 elf relocs. */ |
70256ad8 AJ |
217 | struct elf_reloc_map |
218 | { | |
8d88c4ca NC |
219 | bfd_reloc_code_real_type bfd_reloc_val; |
220 | unsigned char elf_reloc_val; | |
221 | }; | |
222 | ||
dc810e39 | 223 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 224 | { |
70256ad8 AJ |
225 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
226 | { BFD_RELOC_64, R_X86_64_64, }, | |
227 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
228 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
229 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
230 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
231 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
232 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
233 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
234 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
235 | { BFD_RELOC_32, R_X86_64_32, }, | |
236 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
237 | { BFD_RELOC_16, R_X86_64_16, }, | |
238 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
239 | { BFD_RELOC_8, R_X86_64_8, }, | |
240 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
241 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
242 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
243 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
244 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
245 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
246 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
247 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
248 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
249 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
250 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
251 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
252 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
253 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
254 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
255 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
256 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
1788fc08 L |
257 | { BFD_RELOC_SIZE32, R_X86_64_SIZE32, }, |
258 | { BFD_RELOC_SIZE64, R_X86_64_SIZE64, }, | |
67a4f2b7 AO |
259 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
260 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
261 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
cbe950e9 | 262 | { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, }, |
56ceb5b5 L |
263 | { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND, }, |
264 | { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND, }, | |
265 | { BFD_RELOC_X86_64_GOTPCRELX, R_X86_64_GOTPCRELX, }, | |
266 | { BFD_RELOC_X86_64_REX_GOTPCRELX, R_X86_64_REX_GOTPCRELX, }, | |
fe4770f4 AJ |
267 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
268 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
269 | }; |
270 | ||
67a4f2b7 | 271 | static reloc_howto_type * |
351f65ca | 272 | elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) |
67a4f2b7 AO |
273 | { |
274 | unsigned i; | |
275 | ||
d7921315 L |
276 | if (r_type == (unsigned int) R_X86_64_32) |
277 | { | |
278 | if (ABI_64_P (abfd)) | |
279 | i = r_type; | |
280 | else | |
281 | i = ARRAY_SIZE (x86_64_elf_howto_table) - 1; | |
282 | } | |
283 | else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
284 | || r_type >= (unsigned int) R_X86_64_max) | |
67a4f2b7 AO |
285 | { |
286 | if (r_type >= (unsigned int) R_X86_64_standard) | |
287 | { | |
695344c0 | 288 | /* xgettext:c-format */ |
4eca0228 AM |
289 | _bfd_error_handler (_("%B: invalid relocation type %d"), |
290 | abfd, (int) r_type); | |
67a4f2b7 AO |
291 | r_type = R_X86_64_NONE; |
292 | } | |
293 | i = r_type; | |
294 | } | |
295 | else | |
296 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
297 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
298 | return &x86_64_elf_howto_table[i]; | |
299 | } | |
8d88c4ca NC |
300 | |
301 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
302 | static reloc_howto_type * | |
351f65ca L |
303 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
304 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
305 | { |
306 | unsigned int i; | |
27482721 | 307 | |
8d88c4ca NC |
308 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
309 | i++) | |
310 | { | |
311 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
312 | return elf_x86_64_rtype_to_howto (abfd, |
313 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca | 314 | } |
5860e3f8 | 315 | return NULL; |
8d88c4ca NC |
316 | } |
317 | ||
157090f7 | 318 | static reloc_howto_type * |
d7921315 | 319 | elf_x86_64_reloc_name_lookup (bfd *abfd, |
351f65ca | 320 | const char *r_name) |
157090f7 AM |
321 | { |
322 | unsigned int i; | |
323 | ||
d7921315 L |
324 | if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0) |
325 | { | |
326 | /* Get x32 R_X86_64_32. */ | |
327 | reloc_howto_type *reloc | |
328 | = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1]; | |
329 | BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32); | |
330 | return reloc; | |
331 | } | |
332 | ||
333 | for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++) | |
157090f7 AM |
334 | if (x86_64_elf_howto_table[i].name != NULL |
335 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
336 | return &x86_64_elf_howto_table[i]; | |
337 | ||
338 | return NULL; | |
339 | } | |
340 | ||
8d88c4ca | 341 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 342 | |
8d88c4ca | 343 | static void |
351f65ca L |
344 | elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
345 | Elf_Internal_Rela *dst) | |
8d88c4ca | 346 | { |
67a4f2b7 | 347 | unsigned r_type; |
8d88c4ca | 348 | |
351f65ca L |
349 | r_type = ELF32_R_TYPE (dst->r_info); |
350 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); | |
8d88c4ca NC |
351 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
352 | } | |
70256ad8 | 353 | \f |
3bab7989 | 354 | /* Support for core dump NOTE sections. */ |
b34976b6 | 355 | static bfd_boolean |
351f65ca | 356 | elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
357 | { |
358 | int offset; | |
eea6121a | 359 | size_t size; |
3bab7989 ML |
360 | |
361 | switch (note->descsz) | |
362 | { | |
363 | default: | |
b34976b6 | 364 | return FALSE; |
3bab7989 | 365 | |
bcd823f1 L |
366 | case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */ |
367 | /* pr_cursig */ | |
228e534f | 368 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
bcd823f1 L |
369 | |
370 | /* pr_pid */ | |
228e534f | 371 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
bcd823f1 L |
372 | |
373 | /* pr_reg */ | |
374 | offset = 72; | |
375 | size = 216; | |
376 | ||
377 | break; | |
378 | ||
3bab7989 ML |
379 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ |
380 | /* pr_cursig */ | |
228e534f | 381 | elf_tdata (abfd)->core->signal |
3bab7989 ML |
382 | = bfd_get_16 (abfd, note->descdata + 12); |
383 | ||
384 | /* pr_pid */ | |
228e534f | 385 | elf_tdata (abfd)->core->lwpid |
3bab7989 ML |
386 | = bfd_get_32 (abfd, note->descdata + 32); |
387 | ||
388 | /* pr_reg */ | |
389 | offset = 112; | |
eea6121a | 390 | size = 216; |
3bab7989 ML |
391 | |
392 | break; | |
393 | } | |
394 | ||
395 | /* Make a ".reg/999" section. */ | |
396 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 397 | size, note->descpos + offset); |
3bab7989 ML |
398 | } |
399 | ||
b34976b6 | 400 | static bfd_boolean |
351f65ca | 401 | elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
402 | { |
403 | switch (note->descsz) | |
404 | { | |
405 | default: | |
b34976b6 | 406 | return FALSE; |
3bab7989 | 407 | |
bcd823f1 | 408 | case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */ |
228e534f | 409 | elf_tdata (abfd)->core->pid |
bcd823f1 | 410 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 411 | elf_tdata (abfd)->core->program |
bcd823f1 | 412 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 413 | elf_tdata (abfd)->core->command |
bcd823f1 L |
414 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
415 | break; | |
416 | ||
3bab7989 | 417 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ |
228e534f | 418 | elf_tdata (abfd)->core->pid |
261b8d08 | 419 | = bfd_get_32 (abfd, note->descdata + 24); |
228e534f | 420 | elf_tdata (abfd)->core->program |
3bab7989 | 421 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
228e534f | 422 | elf_tdata (abfd)->core->command |
3bab7989 ML |
423 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
424 | } | |
425 | ||
426 | /* Note that for some reason, a spurious space is tacked | |
427 | onto the end of the args in some (at least one anyway) | |
428 | implementations, so strip it off if it exists. */ | |
429 | ||
430 | { | |
228e534f | 431 | char *command = elf_tdata (abfd)->core->command; |
3bab7989 ML |
432 | int n = strlen (command); |
433 | ||
434 | if (0 < n && command[n - 1] == ' ') | |
435 | command[n - 1] = '\0'; | |
436 | } | |
437 | ||
b34976b6 | 438 | return TRUE; |
3bab7989 | 439 | } |
8fd79e71 L |
440 | |
441 | #ifdef CORE_HEADER | |
442 | static char * | |
443 | elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz, | |
444 | int note_type, ...) | |
445 | { | |
446 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8fd79e71 L |
447 | va_list ap; |
448 | const char *fname, *psargs; | |
449 | long pid; | |
450 | int cursig; | |
451 | const void *gregs; | |
452 | ||
453 | switch (note_type) | |
454 | { | |
455 | default: | |
456 | return NULL; | |
457 | ||
458 | case NT_PRPSINFO: | |
459 | va_start (ap, note_type); | |
460 | fname = va_arg (ap, const char *); | |
461 | psargs = va_arg (ap, const char *); | |
462 | va_end (ap); | |
463 | ||
464 | if (bed->s->elfclass == ELFCLASS32) | |
465 | { | |
466 | prpsinfo32_t data; | |
467 | memset (&data, 0, sizeof (data)); | |
468 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
469 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
470 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
471 | &data, sizeof (data)); | |
8fd79e71 L |
472 | } |
473 | else | |
474 | { | |
b1bd052d | 475 | prpsinfo64_t data; |
8fd79e71 L |
476 | memset (&data, 0, sizeof (data)); |
477 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
478 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
479 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
480 | &data, sizeof (data)); | |
8fd79e71 | 481 | } |
e85c6a70 | 482 | /* NOTREACHED */ |
8fd79e71 L |
483 | |
484 | case NT_PRSTATUS: | |
485 | va_start (ap, note_type); | |
486 | pid = va_arg (ap, long); | |
487 | cursig = va_arg (ap, int); | |
488 | gregs = va_arg (ap, const void *); | |
489 | va_end (ap); | |
490 | ||
491 | if (bed->s->elfclass == ELFCLASS32) | |
492 | { | |
493 | if (bed->elf_machine_code == EM_X86_64) | |
494 | { | |
495 | prstatusx32_t prstat; | |
496 | memset (&prstat, 0, sizeof (prstat)); | |
497 | prstat.pr_pid = pid; | |
498 | prstat.pr_cursig = cursig; | |
499 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
500 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
501 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
502 | } |
503 | else | |
504 | { | |
505 | prstatus32_t prstat; | |
506 | memset (&prstat, 0, sizeof (prstat)); | |
507 | prstat.pr_pid = pid; | |
508 | prstat.pr_cursig = cursig; | |
509 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
510 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
511 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
512 | } |
513 | } | |
514 | else | |
515 | { | |
b1bd052d | 516 | prstatus64_t prstat; |
8fd79e71 L |
517 | memset (&prstat, 0, sizeof (prstat)); |
518 | prstat.pr_pid = pid; | |
519 | prstat.pr_cursig = cursig; | |
520 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
521 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
522 | &prstat, sizeof (prstat)); | |
8fd79e71 | 523 | } |
8fd79e71 | 524 | } |
e85c6a70 | 525 | /* NOTREACHED */ |
8fd79e71 L |
526 | } |
527 | #endif | |
3bab7989 | 528 | \f |
407443a3 | 529 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 530 | |
407443a3 | 531 | /* The name of the dynamic interpreter. This is put in the .interp |
70256ad8 AJ |
532 | section. */ |
533 | ||
351f65ca | 534 | #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
eec9dd95 | 535 | #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1" |
70256ad8 | 536 | |
d40d037c AJ |
537 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
538 | copying dynamic variables from a shared lib into an app's dynbss | |
539 | section, and instead use a dynamic relocation to point into the | |
540 | shared lib. */ | |
541 | #define ELIMINATE_COPY_RELOCS 1 | |
542 | ||
70256ad8 AJ |
543 | /* The size in bytes of an entry in the global offset table. */ |
544 | ||
545 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 546 | |
70256ad8 | 547 | /* The size in bytes of an entry in the procedure linkage table. */ |
8d88c4ca | 548 | |
70256ad8 AJ |
549 | #define PLT_ENTRY_SIZE 16 |
550 | ||
551 | /* The first entry in a procedure linkage table looks like this. See the | |
552 | SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */ | |
553 | ||
351f65ca | 554 | static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] = |
70256ad8 | 555 | { |
653165cc AJ |
556 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
557 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 558 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
559 | }; |
560 | ||
561 | /* Subsequent entries in a procedure linkage table look like this. */ | |
562 | ||
351f65ca | 563 | static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] = |
70256ad8 | 564 | { |
653165cc | 565 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 566 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 567 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
568 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
569 | 0xe9, /* jmp relative */ | |
570 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
571 | }; | |
572 | ||
0ff2b86e L |
573 | /* The first entry in a procedure linkage table with BND relocations |
574 | like this. */ | |
575 | ||
576 | static const bfd_byte elf_x86_64_bnd_plt0_entry[PLT_ENTRY_SIZE] = | |
577 | { | |
578 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
579 | 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */ | |
580 | 0x0f, 0x1f, 0 /* nopl (%rax) */ | |
581 | }; | |
582 | ||
583 | /* Subsequent entries for legacy branches in a procedure linkage table | |
584 | with BND relocations look like this. */ | |
585 | ||
586 | static const bfd_byte elf_x86_64_legacy_plt_entry[PLT_ENTRY_SIZE] = | |
587 | { | |
588 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
589 | 0xe9, 0, 0, 0, 0, /* jmpq relative */ | |
590 | 0x66, 0x0f, 0x1f, 0x44, 0, 0 /* nopw (%rax,%rax,1) */ | |
591 | }; | |
592 | ||
593 | /* Subsequent entries for branches with BND prefx in a procedure linkage | |
594 | table with BND relocations look like this. */ | |
595 | ||
596 | static const bfd_byte elf_x86_64_bnd_plt_entry[PLT_ENTRY_SIZE] = | |
597 | { | |
598 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
599 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
600 | 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */ | |
601 | }; | |
602 | ||
603 | /* Entries for legacy branches in the second procedure linkage table | |
604 | look like this. */ | |
605 | ||
606 | static const bfd_byte elf_x86_64_legacy_plt2_entry[8] = | |
607 | { | |
608 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ | |
609 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
610 | 0x66, 0x90 /* xchg %ax,%ax */ | |
611 | }; | |
612 | ||
613 | /* Entries for branches with BND prefix in the second procedure linkage | |
614 | table look like this. */ | |
615 | ||
616 | static const bfd_byte elf_x86_64_bnd_plt2_entry[8] = | |
617 | { | |
618 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ | |
619 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
620 | 0x90 /* nop */ | |
621 | }; | |
622 | ||
e41b3a13 JJ |
623 | /* .eh_frame covering the .plt section. */ |
624 | ||
625 | static const bfd_byte elf_x86_64_eh_frame_plt[] = | |
626 | { | |
627 | #define PLT_CIE_LENGTH 20 | |
628 | #define PLT_FDE_LENGTH 36 | |
629 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
630 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
631 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
632 | 0, 0, 0, 0, /* CIE ID */ | |
633 | 1, /* CIE version */ | |
634 | 'z', 'R', 0, /* Augmentation string */ | |
635 | 1, /* Code alignment factor */ | |
636 | 0x78, /* Data alignment factor */ | |
637 | 16, /* Return address column */ | |
638 | 1, /* Augmentation size */ | |
639 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
640 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
641 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
642 | DW_CFA_nop, DW_CFA_nop, | |
643 | ||
644 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
645 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
646 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
647 | 0, 0, 0, 0, /* .plt size goes here */ | |
648 | 0, /* Augmentation size */ | |
649 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
650 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
651 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
652 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
653 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
654 | 11, /* Block length */ | |
655 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
656 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
657 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
658 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
659 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
660 | }; | |
661 | ||
9e659176 L |
662 | /* .eh_frame covering the BND .plt section. */ |
663 | ||
664 | static const bfd_byte elf_x86_64_eh_frame_bnd_plt[] = | |
665 | { | |
666 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
667 | 0, 0, 0, 0, /* CIE ID */ | |
668 | 1, /* CIE version */ | |
669 | 'z', 'R', 0, /* Augmentation string */ | |
670 | 1, /* Code alignment factor */ | |
671 | 0x78, /* Data alignment factor */ | |
672 | 16, /* Return address column */ | |
673 | 1, /* Augmentation size */ | |
674 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
675 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
676 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
677 | DW_CFA_nop, DW_CFA_nop, | |
678 | ||
679 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
680 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
681 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
682 | 0, 0, 0, 0, /* .plt size goes here */ | |
683 | 0, /* Augmentation size */ | |
684 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
685 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
686 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
687 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
688 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
689 | 11, /* Block length */ | |
690 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
691 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
692 | DW_OP_lit15, DW_OP_and, DW_OP_lit5, DW_OP_ge, | |
693 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
694 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
695 | }; | |
696 | ||
fff53dae L |
697 | /* .eh_frame covering the .plt.got section. */ |
698 | ||
699 | static const bfd_byte elf_x86_64_eh_frame_plt_got[] = | |
700 | { | |
701 | #define PLT_GOT_FDE_LENGTH 20 | |
702 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
703 | 0, 0, 0, 0, /* CIE ID */ | |
704 | 1, /* CIE version */ | |
705 | 'z', 'R', 0, /* Augmentation string */ | |
706 | 1, /* Code alignment factor */ | |
707 | 0x78, /* Data alignment factor */ | |
708 | 16, /* Return address column */ | |
709 | 1, /* Augmentation size */ | |
710 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
711 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
712 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
713 | DW_CFA_nop, DW_CFA_nop, | |
714 | ||
715 | PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
716 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
717 | 0, 0, 0, 0, /* the start of .plt.got goes here */ | |
718 | 0, 0, 0, 0, /* .plt.got size goes here */ | |
719 | 0, /* Augmentation size */ | |
720 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, | |
721 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
722 | }; | |
723 | ||
eed180f8 RM |
724 | /* Architecture-specific backend data for x86-64. */ |
725 | ||
726 | struct elf_x86_64_backend_data | |
727 | { | |
728 | /* Templates for the initial PLT entry and for subsequent entries. */ | |
729 | const bfd_byte *plt0_entry; | |
730 | const bfd_byte *plt_entry; | |
731 | unsigned int plt_entry_size; /* Size of each PLT entry. */ | |
732 | ||
733 | /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */ | |
734 | unsigned int plt0_got1_offset; | |
735 | unsigned int plt0_got2_offset; | |
736 | ||
737 | /* Offset of the end of the PC-relative instruction containing | |
738 | plt0_got2_offset. */ | |
739 | unsigned int plt0_got2_insn_end; | |
740 | ||
741 | /* Offsets into plt_entry that are to be replaced with... */ | |
742 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
743 | unsigned int plt_reloc_offset; /* ... offset into relocation table. */ | |
744 | unsigned int plt_plt_offset; /* ... offset to start of .plt. */ | |
745 | ||
746 | /* Length of the PC-relative instruction containing plt_got_offset. */ | |
747 | unsigned int plt_got_insn_size; | |
748 | ||
749 | /* Offset of the end of the PC-relative jump to plt0_entry. */ | |
750 | unsigned int plt_plt_insn_end; | |
751 | ||
752 | /* Offset into plt_entry where the initial value of the GOT entry points. */ | |
753 | unsigned int plt_lazy_offset; | |
754 | ||
755 | /* .eh_frame covering the .plt section. */ | |
756 | const bfd_byte *eh_frame_plt; | |
757 | unsigned int eh_frame_plt_size; | |
fff53dae L |
758 | |
759 | /* .eh_frame covering the .plt.got section. */ | |
760 | const bfd_byte *eh_frame_plt_got; | |
761 | unsigned int eh_frame_plt_got_size; | |
eed180f8 RM |
762 | }; |
763 | ||
f8222080 L |
764 | #define get_elf_x86_64_arch_data(bed) \ |
765 | ((const struct elf_x86_64_backend_data *) (bed)->arch_data) | |
766 | ||
eed180f8 | 767 | #define get_elf_x86_64_backend_data(abfd) \ |
f8222080 | 768 | get_elf_x86_64_arch_data (get_elf_backend_data (abfd)) |
eed180f8 RM |
769 | |
770 | #define GET_PLT_ENTRY_SIZE(abfd) \ | |
771 | get_elf_x86_64_backend_data (abfd)->plt_entry_size | |
772 | ||
773 | /* These are the standard parameters. */ | |
774 | static const struct elf_x86_64_backend_data elf_x86_64_arch_bed = | |
775 | { | |
776 | elf_x86_64_plt0_entry, /* plt0_entry */ | |
777 | elf_x86_64_plt_entry, /* plt_entry */ | |
778 | sizeof (elf_x86_64_plt_entry), /* plt_entry_size */ | |
779 | 2, /* plt0_got1_offset */ | |
780 | 8, /* plt0_got2_offset */ | |
781 | 12, /* plt0_got2_insn_end */ | |
782 | 2, /* plt_got_offset */ | |
783 | 7, /* plt_reloc_offset */ | |
784 | 12, /* plt_plt_offset */ | |
785 | 6, /* plt_got_insn_size */ | |
786 | PLT_ENTRY_SIZE, /* plt_plt_insn_end */ | |
787 | 6, /* plt_lazy_offset */ | |
788 | elf_x86_64_eh_frame_plt, /* eh_frame_plt */ | |
789 | sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */ | |
fff53dae L |
790 | elf_x86_64_eh_frame_plt_got, /* eh_frame_plt_got */ |
791 | sizeof (elf_x86_64_eh_frame_plt_got), /* eh_frame_plt_got_size */ | |
eed180f8 RM |
792 | }; |
793 | ||
0ff2b86e L |
794 | static const struct elf_x86_64_backend_data elf_x86_64_bnd_arch_bed = |
795 | { | |
796 | elf_x86_64_bnd_plt0_entry, /* plt0_entry */ | |
797 | elf_x86_64_bnd_plt_entry, /* plt_entry */ | |
798 | sizeof (elf_x86_64_bnd_plt_entry), /* plt_entry_size */ | |
799 | 2, /* plt0_got1_offset */ | |
800 | 1+8, /* plt0_got2_offset */ | |
801 | 1+12, /* plt0_got2_insn_end */ | |
802 | 1+2, /* plt_got_offset */ | |
803 | 1, /* plt_reloc_offset */ | |
804 | 7, /* plt_plt_offset */ | |
805 | 1+6, /* plt_got_insn_size */ | |
806 | 11, /* plt_plt_insn_end */ | |
807 | 0, /* plt_lazy_offset */ | |
9e659176 L |
808 | elf_x86_64_eh_frame_bnd_plt, /* eh_frame_plt */ |
809 | sizeof (elf_x86_64_eh_frame_bnd_plt), /* eh_frame_plt_size */ | |
810 | elf_x86_64_eh_frame_plt_got, /* eh_frame_plt_got */ | |
811 | sizeof (elf_x86_64_eh_frame_plt_got), /* eh_frame_plt_got_size */ | |
0ff2b86e L |
812 | }; |
813 | ||
eed180f8 RM |
814 | #define elf_backend_arch_data &elf_x86_64_arch_bed |
815 | ||
aec6b87e L |
816 | /* Is a undefined weak symbol which is resolved to 0. Reference to an |
817 | undefined weak symbol is resolved to 0 when building executable if | |
818 | it isn't dynamic and | |
819 | 1. Has non-GOT/non-PLT relocations in text section. Or | |
820 | 2. Has no GOT/PLT relocation. | |
821 | */ | |
e62b9723 | 822 | #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \ |
aec6b87e L |
823 | ((EH)->elf.root.type == bfd_link_hash_undefweak \ |
824 | && bfd_link_executable (INFO) \ | |
825 | && (elf_x86_64_hash_table (INFO)->interp == NULL \ | |
e62b9723 | 826 | || !(GOT_RELOC) \ |
aec6b87e L |
827 | || (EH)->has_non_got_reloc \ |
828 | || !(INFO)->dynamic_undefined_weak)) | |
829 | ||
70256ad8 AJ |
830 | /* x86-64 ELF linker hash entry. */ |
831 | ||
351f65ca | 832 | struct elf_x86_64_link_hash_entry |
70256ad8 | 833 | { |
c434dee6 | 834 | struct elf_link_hash_entry elf; |
70256ad8 | 835 | |
c434dee6 | 836 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 837 | struct elf_dyn_relocs *dyn_relocs; |
bffbf940 JJ |
838 | |
839 | #define GOT_UNKNOWN 0 | |
840 | #define GOT_NORMAL 1 | |
841 | #define GOT_TLS_GD 2 | |
842 | #define GOT_TLS_IE 3 | |
67a4f2b7 AO |
843 | #define GOT_TLS_GDESC 4 |
844 | #define GOT_TLS_GD_BOTH_P(type) \ | |
845 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
846 | #define GOT_TLS_GD_P(type) \ | |
847 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
848 | #define GOT_TLS_GDESC_P(type) \ | |
849 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
850 | #define GOT_TLS_GD_ANY_P(type) \ | |
851 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
bffbf940 | 852 | unsigned char tls_type; |
67a4f2b7 | 853 | |
bc696fd5 L |
854 | /* TRUE if a weak symbol with a real definition needs a copy reloc. |
855 | When there is a weak symbol with a real definition, the processor | |
856 | independent code will have arranged for us to see the real | |
857 | definition first. We need to copy the needs_copy bit from the | |
858 | real definition and check it when allowing copy reloc in PIE. */ | |
859 | unsigned int needs_copy : 1; | |
860 | ||
0ff2b86e | 861 | /* TRUE if symbol has at least one BND relocation. */ |
bc696fd5 | 862 | unsigned int has_bnd_reloc : 1; |
0ff2b86e | 863 | |
aec6b87e L |
864 | /* TRUE if symbol has GOT or PLT relocations. */ |
865 | unsigned int has_got_reloc : 1; | |
866 | ||
867 | /* TRUE if symbol has non-GOT/non-PLT relocations in text sections. */ | |
868 | unsigned int has_non_got_reloc : 1; | |
869 | ||
e2cbcd91 L |
870 | /* 0: symbol isn't __tls_get_addr. |
871 | 1: symbol is __tls_get_addr. | |
872 | 2: symbol is unknown. */ | |
873 | unsigned int tls_get_addr : 2; | |
874 | ||
04ebc307 L |
875 | /* Reference count of C/C++ function pointer relocations in read-write |
876 | section which can be resolved at run-time. */ | |
877 | bfd_signed_vma func_pointer_refcount; | |
878 | ||
dd7e64d4 L |
879 | /* Information about the GOT PLT entry. Filled when there are both |
880 | GOT and PLT relocations against the same function. */ | |
881 | union gotplt_union plt_got; | |
882 | ||
0ff2b86e L |
883 | /* Information about the second PLT entry. Filled when has_bnd_reloc is |
884 | set. */ | |
885 | union gotplt_union plt_bnd; | |
886 | ||
67a4f2b7 AO |
887 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, |
888 | starting at the end of the jump table. */ | |
889 | bfd_vma tlsdesc_got; | |
bffbf940 JJ |
890 | }; |
891 | ||
351f65ca L |
892 | #define elf_x86_64_hash_entry(ent) \ |
893 | ((struct elf_x86_64_link_hash_entry *)(ent)) | |
bffbf940 | 894 | |
351f65ca | 895 | struct elf_x86_64_obj_tdata |
bffbf940 JJ |
896 | { |
897 | struct elf_obj_tdata root; | |
898 | ||
899 | /* tls_type for each local got entry. */ | |
900 | char *local_got_tls_type; | |
67a4f2b7 AO |
901 | |
902 | /* GOTPLT entries for TLS descriptors. */ | |
903 | bfd_vma *local_tlsdesc_gotent; | |
70256ad8 AJ |
904 | }; |
905 | ||
351f65ca L |
906 | #define elf_x86_64_tdata(abfd) \ |
907 | ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any) | |
bffbf940 | 908 | |
351f65ca L |
909 | #define elf_x86_64_local_got_tls_type(abfd) \ |
910 | (elf_x86_64_tdata (abfd)->local_got_tls_type) | |
bffbf940 | 911 | |
351f65ca L |
912 | #define elf_x86_64_local_tlsdesc_gotent(abfd) \ |
913 | (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent) | |
bffbf940 | 914 | |
0ffa91dd NC |
915 | #define is_x86_64_elf(bfd) \ |
916 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
917 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 918 | && elf_object_id (bfd) == X86_64_ELF_DATA) |
0ffa91dd NC |
919 | |
920 | static bfd_boolean | |
351f65ca | 921 | elf_x86_64_mkobject (bfd *abfd) |
0ffa91dd | 922 | { |
351f65ca | 923 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata), |
4dfe6ac6 | 924 | X86_64_ELF_DATA); |
0ffa91dd NC |
925 | } |
926 | ||
c434dee6 | 927 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 928 | |
351f65ca | 929 | struct elf_x86_64_link_hash_table |
407443a3 | 930 | { |
c434dee6 | 931 | struct elf_link_hash_table elf; |
70256ad8 | 932 | |
c434dee6 | 933 | /* Short-cuts to get to dynamic linker sections. */ |
aec6b87e | 934 | asection *interp; |
e41b3a13 | 935 | asection *plt_eh_frame; |
0ff2b86e | 936 | asection *plt_bnd; |
8361ed4d | 937 | asection *plt_bnd_eh_frame; |
dd7e64d4 | 938 | asection *plt_got; |
fff53dae | 939 | asection *plt_got_eh_frame; |
70256ad8 | 940 | |
4dfe6ac6 NC |
941 | union |
942 | { | |
bffbf940 JJ |
943 | bfd_signed_vma refcount; |
944 | bfd_vma offset; | |
945 | } tls_ld_got; | |
946 | ||
67a4f2b7 AO |
947 | /* The amount of space used by the jump slots in the GOT. */ |
948 | bfd_vma sgotplt_jump_table_size; | |
949 | ||
87d72d41 AM |
950 | /* Small local sym cache. */ |
951 | struct sym_cache sym_cache; | |
9f03412a | 952 | |
351f65ca L |
953 | bfd_vma (*r_info) (bfd_vma, bfd_vma); |
954 | bfd_vma (*r_sym) (bfd_vma); | |
248775ba | 955 | unsigned int pointer_r_type; |
351f65ca L |
956 | const char *dynamic_interpreter; |
957 | int dynamic_interpreter_size; | |
958 | ||
9f03412a AO |
959 | /* _TLS_MODULE_BASE_ symbol. */ |
960 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
961 | |
962 | /* Used by local STT_GNU_IFUNC symbols. */ | |
963 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
964 | void * loc_hash_memory; |
965 | ||
966 | /* The offset into splt of the PLT entry for the TLS descriptor | |
967 | resolver. Special values are 0, if not necessary (or not found | |
968 | to be necessary yet), and -1 if needed but not determined | |
969 | yet. */ | |
970 | bfd_vma tlsdesc_plt; | |
971 | /* The offset into sgot of the GOT entry used by the PLT entry | |
972 | above. */ | |
973 | bfd_vma tlsdesc_got; | |
e1f98742 L |
974 | |
975 | /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */ | |
976 | bfd_vma next_jump_slot_index; | |
977 | /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */ | |
978 | bfd_vma next_irelative_index; | |
2df3368d L |
979 | |
980 | /* TRUE if there are dynamic relocs against IFUNC symbols that apply | |
981 | to read-only sections. */ | |
982 | bfd_boolean readonly_dynrelocs_against_ifunc; | |
c434dee6 | 983 | }; |
70256ad8 AJ |
984 | |
985 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca | 986 | |
351f65ca | 987 | #define elf_x86_64_hash_table(p) \ |
4dfe6ac6 | 988 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
351f65ca | 989 | == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL) |
8d88c4ca | 990 | |
351f65ca | 991 | #define elf_x86_64_compute_jump_table_size(htab) \ |
6de2ae4a | 992 | ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE) |
67a4f2b7 | 993 | |
407443a3 | 994 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
995 | |
996 | static struct bfd_hash_entry * | |
351f65ca L |
997 | elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry, |
998 | struct bfd_hash_table *table, | |
999 | const char *string) | |
70256ad8 | 1000 | { |
70256ad8 | 1001 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
1002 | subclass. */ |
1003 | if (entry == NULL) | |
1004 | { | |
a50b1753 | 1005 | entry = (struct bfd_hash_entry *) |
eed180f8 RM |
1006 | bfd_hash_allocate (table, |
1007 | sizeof (struct elf_x86_64_link_hash_entry)); | |
c434dee6 AJ |
1008 | if (entry == NULL) |
1009 | return entry; | |
1010 | } | |
70256ad8 AJ |
1011 | |
1012 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
1013 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
1014 | if (entry != NULL) | |
70256ad8 | 1015 | { |
351f65ca | 1016 | struct elf_x86_64_link_hash_entry *eh; |
c434dee6 | 1017 | |
351f65ca | 1018 | eh = (struct elf_x86_64_link_hash_entry *) entry; |
c434dee6 | 1019 | eh->dyn_relocs = NULL; |
bffbf940 | 1020 | eh->tls_type = GOT_UNKNOWN; |
bc696fd5 L |
1021 | eh->needs_copy = 0; |
1022 | eh->has_bnd_reloc = 0; | |
aec6b87e L |
1023 | eh->has_got_reloc = 0; |
1024 | eh->has_non_got_reloc = 0; | |
e2cbcd91 | 1025 | eh->tls_get_addr = 2; |
04ebc307 | 1026 | eh->func_pointer_refcount = 0; |
0ff2b86e | 1027 | eh->plt_bnd.offset = (bfd_vma) -1; |
dd7e64d4 | 1028 | eh->plt_got.offset = (bfd_vma) -1; |
67a4f2b7 | 1029 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
1030 | } |
1031 | ||
c434dee6 | 1032 | return entry; |
70256ad8 AJ |
1033 | } |
1034 | ||
c25bc9fc L |
1035 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
1036 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
1037 | as global symbol. We reuse indx and dynstr_index for local symbol | |
1038 | hash since they aren't used by global symbols in this backend. */ | |
1039 | ||
1040 | static hashval_t | |
351f65ca | 1041 | elf_x86_64_local_htab_hash (const void *ptr) |
c25bc9fc L |
1042 | { |
1043 | struct elf_link_hash_entry *h | |
1044 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 1045 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
1046 | } |
1047 | ||
1048 | /* Compare local hash entries. */ | |
1049 | ||
1050 | static int | |
351f65ca | 1051 | elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2) |
c25bc9fc L |
1052 | { |
1053 | struct elf_link_hash_entry *h1 | |
1054 | = (struct elf_link_hash_entry *) ptr1; | |
1055 | struct elf_link_hash_entry *h2 | |
1056 | = (struct elf_link_hash_entry *) ptr2; | |
1057 | ||
1058 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
1059 | } | |
1060 | ||
1061 | /* Find and/or create a hash entry for local symbol. */ | |
1062 | ||
1063 | static struct elf_link_hash_entry * | |
351f65ca L |
1064 | elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab, |
1065 | bfd *abfd, const Elf_Internal_Rela *rel, | |
1066 | bfd_boolean create) | |
c25bc9fc | 1067 | { |
351f65ca | 1068 | struct elf_x86_64_link_hash_entry e, *ret; |
c25bc9fc | 1069 | asection *sec = abfd->sections; |
d2149d72 | 1070 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
351f65ca | 1071 | htab->r_sym (rel->r_info)); |
c25bc9fc L |
1072 | void **slot; |
1073 | ||
1074 | e.elf.indx = sec->id; | |
351f65ca | 1075 | e.elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc L |
1076 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, |
1077 | create ? INSERT : NO_INSERT); | |
1078 | ||
1079 | if (!slot) | |
1080 | return NULL; | |
1081 | ||
1082 | if (*slot) | |
1083 | { | |
351f65ca | 1084 | ret = (struct elf_x86_64_link_hash_entry *) *slot; |
c25bc9fc L |
1085 | return &ret->elf; |
1086 | } | |
1087 | ||
351f65ca | 1088 | ret = (struct elf_x86_64_link_hash_entry *) |
c25bc9fc | 1089 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, |
351f65ca | 1090 | sizeof (struct elf_x86_64_link_hash_entry)); |
c25bc9fc L |
1091 | if (ret) |
1092 | { | |
1093 | memset (ret, 0, sizeof (*ret)); | |
1094 | ret->elf.indx = sec->id; | |
351f65ca | 1095 | ret->elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc | 1096 | ret->elf.dynindx = -1; |
04ebc307 | 1097 | ret->func_pointer_refcount = 0; |
dd7e64d4 | 1098 | ret->plt_got.offset = (bfd_vma) -1; |
c25bc9fc L |
1099 | *slot = ret; |
1100 | } | |
1101 | return &ret->elf; | |
1102 | } | |
1103 | ||
68faa637 AM |
1104 | /* Destroy an X86-64 ELF linker hash table. */ |
1105 | ||
1106 | static void | |
d495ab0d | 1107 | elf_x86_64_link_hash_table_free (bfd *obfd) |
68faa637 AM |
1108 | { |
1109 | struct elf_x86_64_link_hash_table *htab | |
d495ab0d | 1110 | = (struct elf_x86_64_link_hash_table *) obfd->link.hash; |
68faa637 AM |
1111 | |
1112 | if (htab->loc_hash_table) | |
1113 | htab_delete (htab->loc_hash_table); | |
1114 | if (htab->loc_hash_memory) | |
1115 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
d495ab0d | 1116 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
1117 | } |
1118 | ||
8d88c4ca NC |
1119 | /* Create an X86-64 ELF linker hash table. */ |
1120 | ||
1121 | static struct bfd_link_hash_table * | |
351f65ca | 1122 | elf_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca | 1123 | { |
351f65ca L |
1124 | struct elf_x86_64_link_hash_table *ret; |
1125 | bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table); | |
8d88c4ca | 1126 | |
7bf52ea2 | 1127 | ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt); |
c434dee6 | 1128 | if (ret == NULL) |
8d88c4ca NC |
1129 | return NULL; |
1130 | ||
eb4ff4d6 | 1131 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
351f65ca L |
1132 | elf_x86_64_link_hash_newfunc, |
1133 | sizeof (struct elf_x86_64_link_hash_entry), | |
4dfe6ac6 | 1134 | X86_64_ELF_DATA)) |
8d88c4ca | 1135 | { |
e2d34d7d | 1136 | free (ret); |
8d88c4ca NC |
1137 | return NULL; |
1138 | } | |
1139 | ||
351f65ca L |
1140 | if (ABI_64_P (abfd)) |
1141 | { | |
1142 | ret->r_info = elf64_r_info; | |
1143 | ret->r_sym = elf64_r_sym; | |
248775ba | 1144 | ret->pointer_r_type = R_X86_64_64; |
351f65ca L |
1145 | ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; |
1146 | ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; | |
1147 | } | |
1148 | else | |
1149 | { | |
1150 | ret->r_info = elf32_r_info; | |
1151 | ret->r_sym = elf32_r_sym; | |
248775ba | 1152 | ret->pointer_r_type = R_X86_64_32; |
351f65ca L |
1153 | ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; |
1154 | ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER; | |
1155 | } | |
1156 | ||
c25bc9fc | 1157 | ret->loc_hash_table = htab_try_create (1024, |
351f65ca L |
1158 | elf_x86_64_local_htab_hash, |
1159 | elf_x86_64_local_htab_eq, | |
c25bc9fc L |
1160 | NULL); |
1161 | ret->loc_hash_memory = objalloc_create (); | |
1162 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
1163 | { | |
d495ab0d | 1164 | elf_x86_64_link_hash_table_free (abfd); |
c25bc9fc L |
1165 | return NULL; |
1166 | } | |
d495ab0d | 1167 | ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free; |
c25bc9fc | 1168 | |
c434dee6 AJ |
1169 | return &ret->elf.root; |
1170 | } | |
1171 | ||
c434dee6 AJ |
1172 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
1173 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
1174 | hash table. */ | |
1175 | ||
b34976b6 | 1176 | static bfd_boolean |
351f65ca L |
1177 | elf_x86_64_create_dynamic_sections (bfd *dynobj, |
1178 | struct bfd_link_info *info) | |
c434dee6 | 1179 | { |
351f65ca | 1180 | struct elf_x86_64_link_hash_table *htab; |
c434dee6 | 1181 | |
c434dee6 | 1182 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 1183 | return FALSE; |
c434dee6 | 1184 | |
351f65ca | 1185 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1186 | if (htab == NULL) |
1187 | return FALSE; | |
1188 | ||
493f652c L |
1189 | /* Set the contents of the .interp section to the interpreter. */ |
1190 | if (bfd_link_executable (info) && !info->nointerp) | |
1191 | { | |
1192 | asection *s = bfd_get_linker_section (dynobj, ".interp"); | |
1193 | if (s == NULL) | |
1194 | abort (); | |
1195 | s->size = htab->dynamic_interpreter_size; | |
1196 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
1197 | htab->interp = s; | |
1198 | } | |
1199 | ||
e41b3a13 | 1200 | if (!info->no_ld_generated_unwind_info |
2fe0fd06 | 1201 | && htab->plt_eh_frame == NULL |
e4de50d4 | 1202 | && htab->elf.splt != NULL) |
e41b3a13 | 1203 | { |
bbf96e4e L |
1204 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
1205 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1206 | | SEC_LINKER_CREATED); | |
e41b3a13 | 1207 | htab->plt_eh_frame |
bbf96e4e | 1208 | = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags); |
e41b3a13 | 1209 | if (htab->plt_eh_frame == NULL |
52b232b3 L |
1210 | || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, |
1211 | ABI_64_P (dynobj) ? 3 : 2)) | |
e41b3a13 | 1212 | return FALSE; |
e41b3a13 | 1213 | } |
37567a2c L |
1214 | |
1215 | /* Align .got section to its entry size. */ | |
1216 | if (htab->elf.sgot != NULL | |
1217 | && !bfd_set_section_alignment (dynobj, htab->elf.sgot, 3)) | |
1218 | return FALSE; | |
1219 | ||
1220 | /* Align .got.plt section to its entry size. */ | |
1221 | if (htab->elf.sgotplt != NULL | |
1222 | && !bfd_set_section_alignment (dynobj, htab->elf.sgotplt, 3)) | |
1223 | return FALSE; | |
1224 | ||
b34976b6 | 1225 | return TRUE; |
c434dee6 AJ |
1226 | } |
1227 | ||
1228 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
1229 | ||
1230 | static void | |
351f65ca L |
1231 | elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
1232 | struct elf_link_hash_entry *dir, | |
1233 | struct elf_link_hash_entry *ind) | |
c434dee6 | 1234 | { |
351f65ca | 1235 | struct elf_x86_64_link_hash_entry *edir, *eind; |
c434dee6 | 1236 | |
351f65ca L |
1237 | edir = (struct elf_x86_64_link_hash_entry *) dir; |
1238 | eind = (struct elf_x86_64_link_hash_entry *) ind; | |
c434dee6 | 1239 | |
e81830c5 AM |
1240 | edir->has_bnd_reloc |= eind->has_bnd_reloc; |
1241 | edir->has_got_reloc |= eind->has_got_reloc; | |
1242 | edir->has_non_got_reloc |= eind->has_non_got_reloc; | |
aec6b87e | 1243 | |
c434dee6 AJ |
1244 | if (eind->dyn_relocs != NULL) |
1245 | { | |
1246 | if (edir->dyn_relocs != NULL) | |
1247 | { | |
e03a8ed8 L |
1248 | struct elf_dyn_relocs **pp; |
1249 | struct elf_dyn_relocs *p; | |
c434dee6 | 1250 | |
fcfa13d2 | 1251 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
1252 | list. Merge any entries against the same section. */ |
1253 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1254 | { | |
e03a8ed8 | 1255 | struct elf_dyn_relocs *q; |
c434dee6 AJ |
1256 | |
1257 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1258 | if (q->sec == p->sec) | |
1259 | { | |
1260 | q->pc_count += p->pc_count; | |
1261 | q->count += p->count; | |
1262 | *pp = p->next; | |
1263 | break; | |
1264 | } | |
1265 | if (q == NULL) | |
1266 | pp = &p->next; | |
1267 | } | |
1268 | *pp = edir->dyn_relocs; | |
1269 | } | |
1270 | ||
1271 | edir->dyn_relocs = eind->dyn_relocs; | |
1272 | eind->dyn_relocs = NULL; | |
1273 | } | |
1274 | ||
bffbf940 JJ |
1275 | if (ind->root.type == bfd_link_hash_indirect |
1276 | && dir->got.refcount <= 0) | |
1277 | { | |
1278 | edir->tls_type = eind->tls_type; | |
1279 | eind->tls_type = GOT_UNKNOWN; | |
1280 | } | |
1281 | ||
d40d037c AJ |
1282 | if (ELIMINATE_COPY_RELOCS |
1283 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1284 | && dir->dynamic_adjusted) |
1285 | { | |
1286 | /* If called to transfer flags for a weakdef during processing | |
1287 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1288 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
e81830c5 AM |
1289 | if (dir->versioned != versioned_hidden) |
1290 | dir->ref_dynamic |= ind->ref_dynamic; | |
f5385ebf AM |
1291 | dir->ref_regular |= ind->ref_regular; |
1292 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1293 | dir->needs_plt |= ind->needs_plt; | |
1294 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1295 | } | |
d40d037c | 1296 | else |
04ebc307 L |
1297 | { |
1298 | if (eind->func_pointer_refcount > 0) | |
1299 | { | |
1300 | edir->func_pointer_refcount += eind->func_pointer_refcount; | |
1301 | eind->func_pointer_refcount = 0; | |
1302 | } | |
1303 | ||
1304 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
1305 | } | |
8d88c4ca NC |
1306 | } |
1307 | ||
b34976b6 | 1308 | static bfd_boolean |
27482721 | 1309 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 1310 | { |
8d88c4ca NC |
1311 | /* Set the right machine number for an x86-64 elf64 file. */ |
1312 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 1313 | return TRUE; |
8d88c4ca NC |
1314 | } |
1315 | ||
8059fb19 RM |
1316 | static bfd_boolean |
1317 | elf32_x86_64_elf_object_p (bfd *abfd) | |
1318 | { | |
1319 | /* Set the right machine number for an x86-64 elf32 file. */ | |
1320 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
1321 | return TRUE; | |
1322 | } | |
1323 | ||
142411ca L |
1324 | /* Return TRUE if the TLS access code sequence support transition |
1325 | from R_TYPE. */ | |
1326 | ||
1327 | static bfd_boolean | |
351f65ca L |
1328 | elf_x86_64_check_tls_transition (bfd *abfd, |
1329 | struct bfd_link_info *info, | |
1330 | asection *sec, | |
1331 | bfd_byte *contents, | |
1332 | Elf_Internal_Shdr *symtab_hdr, | |
1333 | struct elf_link_hash_entry **sym_hashes, | |
1334 | unsigned int r_type, | |
1335 | const Elf_Internal_Rela *rel, | |
1336 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1337 | { |
142411ca L |
1338 | unsigned int val; |
1339 | unsigned long r_symndx; | |
5c98a14e | 1340 | bfd_boolean largepic = FALSE; |
142411ca L |
1341 | struct elf_link_hash_entry *h; |
1342 | bfd_vma offset; | |
351f65ca | 1343 | struct elf_x86_64_link_hash_table *htab; |
e2cbcd91 L |
1344 | bfd_byte *call; |
1345 | bfd_boolean indirect_call, tls_get_addr; | |
142411ca | 1346 | |
351f65ca | 1347 | htab = elf_x86_64_hash_table (info); |
142411ca | 1348 | offset = rel->r_offset; |
bffbf940 | 1349 | switch (r_type) |
142411ca L |
1350 | { |
1351 | case R_X86_64_TLSGD: | |
1352 | case R_X86_64_TLSLD: | |
1353 | if ((rel + 1) >= relend) | |
1354 | return FALSE; | |
1355 | ||
1356 | if (r_type == R_X86_64_TLSGD) | |
1357 | { | |
52bc799a | 1358 | /* Check transition from GD access model. For 64bit, only |
142411ca | 1359 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
e2cbcd91 L |
1360 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1361 | or | |
1362 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
1363 | .byte 0x66; rex64 | |
1364 | call *__tls_get_addr@GOTPCREL(%rip) | |
1365 | which may be converted to | |
1366 | addr32 call __tls_get_addr | |
52bc799a L |
1367 | can transit to different access model. For 32bit, only |
1368 | leaq foo@tlsgd(%rip), %rdi | |
e2cbcd91 L |
1369 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1370 | or | |
1371 | leaq foo@tlsgd(%rip), %rdi | |
1372 | .byte 0x66; rex64 | |
1373 | call *__tls_get_addr@GOTPCREL(%rip) | |
1374 | which may be converted to | |
1375 | addr32 call __tls_get_addr | |
1376 | can transit to different access model. For largepic, | |
5c98a14e | 1377 | we also support: |
e2cbcd91 L |
1378 | leaq foo@tlsgd(%rip), %rdi |
1379 | movabsq $__tls_get_addr@pltoff, %rax | |
1380 | addq $r15, %rax | |
1381 | call *%rax | |
1382 | or | |
5c98a14e JJ |
1383 | leaq foo@tlsgd(%rip), %rdi |
1384 | movabsq $__tls_get_addr@pltoff, %rax | |
1385 | addq $rbx, %rax | |
e2cbcd91 | 1386 | call *%rax */ |
142411ca | 1387 | |
fa289a5f AM |
1388 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; |
1389 | ||
5c98a14e | 1390 | if ((offset + 12) > sec->size) |
142411ca | 1391 | return FALSE; |
52bc799a | 1392 | |
e2cbcd91 L |
1393 | call = contents + offset + 4; |
1394 | if (call[0] != 0x66 | |
1395 | || !((call[1] == 0x48 | |
1396 | && call[2] == 0xff | |
1397 | && call[3] == 0x15) | |
1398 | || (call[1] == 0x48 | |
1399 | && call[2] == 0x67 | |
1400 | && call[3] == 0xe8) | |
1401 | || (call[1] == 0x66 | |
1402 | && call[2] == 0x48 | |
1403 | && call[3] == 0xe8))) | |
5c98a14e JJ |
1404 | { |
1405 | if (!ABI_64_P (abfd) | |
1406 | || (offset + 19) > sec->size | |
1407 | || offset < 3 | |
e2cbcd91 L |
1408 | || memcmp (call - 7, leaq + 1, 3) != 0 |
1409 | || memcmp (call, "\x48\xb8", 2) != 0 | |
1410 | || call[11] != 0x01 | |
1411 | || call[13] != 0xff | |
1412 | || call[14] != 0xd0 | |
1413 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1414 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1415 | return FALSE; |
1416 | largepic = TRUE; | |
1417 | } | |
1418 | else if (ABI_64_P (abfd)) | |
52bc799a | 1419 | { |
52bc799a | 1420 | if (offset < 4 |
fa289a5f | 1421 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1422 | return FALSE; |
1423 | } | |
1424 | else | |
1425 | { | |
52bc799a | 1426 | if (offset < 3 |
fa289a5f | 1427 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1428 | return FALSE; |
1429 | } | |
e2cbcd91 | 1430 | indirect_call = call[2] == 0xff; |
142411ca L |
1431 | } |
1432 | else | |
1433 | { | |
1434 | /* Check transition from LD access model. Only | |
1435 | leaq foo@tlsld(%rip), %rdi; | |
e2cbcd91 L |
1436 | call __tls_get_addr@PLT |
1437 | or | |
1438 | leaq foo@tlsld(%rip), %rdi; | |
1439 | call *__tls_get_addr@GOTPCREL(%rip) | |
1440 | which may be converted to | |
1441 | addr32 call __tls_get_addr | |
5c98a14e JJ |
1442 | can transit to different access model. For largepic |
1443 | we also support: | |
e2cbcd91 L |
1444 | leaq foo@tlsld(%rip), %rdi |
1445 | movabsq $__tls_get_addr@pltoff, %rax | |
1446 | addq $r15, %rax | |
1447 | call *%rax | |
1448 | or | |
5c98a14e JJ |
1449 | leaq foo@tlsld(%rip), %rdi |
1450 | movabsq $__tls_get_addr@pltoff, %rax | |
1451 | addq $rbx, %rax | |
e2cbcd91 | 1452 | call *%rax */ |
142411ca | 1453 | |
fa289a5f | 1454 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1455 | |
1456 | if (offset < 3 || (offset + 9) > sec->size) | |
1457 | return FALSE; | |
1458 | ||
5c98a14e | 1459 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
142411ca | 1460 | return FALSE; |
5c98a14e | 1461 | |
e2cbcd91 L |
1462 | call = contents + offset + 4; |
1463 | if (!(call[0] == 0xe8 | |
1464 | || (call[0] == 0xff && call[1] == 0x15) | |
1465 | || (call[0] == 0x67 && call[1] == 0xe8))) | |
5c98a14e JJ |
1466 | { |
1467 | if (!ABI_64_P (abfd) | |
1468 | || (offset + 19) > sec->size | |
e2cbcd91 L |
1469 | || memcmp (call, "\x48\xb8", 2) != 0 |
1470 | || call[11] != 0x01 | |
1471 | || call[13] != 0xff | |
1472 | || call[14] != 0xd0 | |
1473 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1474 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1475 | return FALSE; |
1476 | largepic = TRUE; | |
1477 | } | |
e2cbcd91 | 1478 | indirect_call = call[0] == 0xff; |
142411ca L |
1479 | } |
1480 | ||
351f65ca | 1481 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1482 | if (r_symndx < symtab_hdr->sh_info) |
1483 | return FALSE; | |
1484 | ||
e2cbcd91 | 1485 | tls_get_addr = FALSE; |
142411ca | 1486 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
e2cbcd91 L |
1487 | if (h != NULL && h->root.root.string != NULL) |
1488 | { | |
1489 | struct elf_x86_64_link_hash_entry *eh | |
1490 | = (struct elf_x86_64_link_hash_entry *) h; | |
1491 | tls_get_addr = eh->tls_get_addr == 1; | |
1492 | if (eh->tls_get_addr > 1) | |
1493 | { | |
1494 | /* Use strncmp to check __tls_get_addr since | |
1495 | __tls_get_addr may be versioned. */ | |
1496 | if (strncmp (h->root.root.string, "__tls_get_addr", 14) | |
1497 | == 0) | |
1498 | { | |
1499 | eh->tls_get_addr = 1; | |
1500 | tls_get_addr = TRUE; | |
1501 | } | |
1502 | else | |
1503 | eh->tls_get_addr = 0; | |
1504 | } | |
1505 | } | |
1506 | ||
1507 | if (!tls_get_addr) | |
1508 | return FALSE; | |
1509 | else if (largepic) | |
1510 | return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64; | |
1511 | else if (indirect_call) | |
1512 | return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_GOTPCRELX; | |
1513 | else | |
1514 | return (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32 | |
1515 | || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
142411ca L |
1516 | |
1517 | case R_X86_64_GOTTPOFF: | |
1518 | /* Check transition from IE access model: | |
4a4c5f25 L |
1519 | mov foo@gottpoff(%rip), %reg |
1520 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1521 | */ |
1522 | ||
4a4c5f25 L |
1523 | /* Check REX prefix first. */ |
1524 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1525 | { | |
1526 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1527 | if (val != 0x48 && val != 0x4c) | |
1528 | { | |
1529 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1530 | if (ABI_64_P (abfd)) | |
1531 | return FALSE; | |
1532 | } | |
1533 | } | |
1534 | else | |
1535 | { | |
1536 | /* X32 may not have any REX prefix. */ | |
1537 | if (ABI_64_P (abfd)) | |
1538 | return FALSE; | |
1539 | if (offset < 2 || (offset + 3) > sec->size) | |
1540 | return FALSE; | |
1541 | } | |
142411ca L |
1542 | |
1543 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1544 | if (val != 0x8b && val != 0x03) | |
1545 | return FALSE; | |
1546 | ||
1547 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1548 | return (val & 0xc7) == 5; | |
1549 | ||
1550 | case R_X86_64_GOTPC32_TLSDESC: | |
1551 | /* Check transition from GDesc access model: | |
1552 | leaq x@tlsdesc(%rip), %rax | |
1553 | ||
1554 | Make sure it's a leaq adding rip to a 32-bit offset | |
1555 | into any register, although it's probably almost always | |
1556 | going to be rax. */ | |
1557 | ||
1558 | if (offset < 3 || (offset + 4) > sec->size) | |
1559 | return FALSE; | |
1560 | ||
1561 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1562 | if ((val & 0xfb) != 0x48) | |
1563 | return FALSE; | |
1564 | ||
1565 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1566 | return FALSE; | |
1567 | ||
1568 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1569 | return (val & 0xc7) == 0x05; | |
1570 | ||
1571 | case R_X86_64_TLSDESC_CALL: | |
1572 | /* Check transition from GDesc access model: | |
1573 | call *x@tlsdesc(%rax) | |
1574 | */ | |
1575 | if (offset + 2 <= sec->size) | |
1576 | { | |
1577 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
e2cbcd91 L |
1578 | call = contents + offset; |
1579 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1580 | } |
1581 | ||
1582 | return FALSE; | |
1583 | ||
1584 | default: | |
1585 | abort (); | |
1586 | } | |
1587 | } | |
1588 | ||
1589 | /* Return TRUE if the TLS access transition is OK or no transition | |
1590 | will be performed. Update R_TYPE if there is a transition. */ | |
1591 | ||
1592 | static bfd_boolean | |
351f65ca L |
1593 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1594 | asection *sec, bfd_byte *contents, | |
1595 | Elf_Internal_Shdr *symtab_hdr, | |
1596 | struct elf_link_hash_entry **sym_hashes, | |
1597 | unsigned int *r_type, int tls_type, | |
1598 | const Elf_Internal_Rela *rel, | |
1599 | const Elf_Internal_Rela *relend, | |
1600 | struct elf_link_hash_entry *h, | |
bedfd056 L |
1601 | unsigned long r_symndx, |
1602 | bfd_boolean from_relocate_section) | |
142411ca L |
1603 | { |
1604 | unsigned int from_type = *r_type; | |
1605 | unsigned int to_type = from_type; | |
1606 | bfd_boolean check = TRUE; | |
1607 | ||
bb1cb422 L |
1608 | /* Skip TLS transition for functions. */ |
1609 | if (h != NULL | |
1610 | && (h->type == STT_FUNC | |
1611 | || h->type == STT_GNU_IFUNC)) | |
1612 | return TRUE; | |
1613 | ||
142411ca | 1614 | switch (from_type) |
bffbf940 JJ |
1615 | { |
1616 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1617 | case R_X86_64_GOTPC32_TLSDESC: |
1618 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1619 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1620 | if (bfd_link_executable (info)) |
142411ca L |
1621 | { |
1622 | if (h == NULL) | |
1623 | to_type = R_X86_64_TPOFF32; | |
1624 | else | |
1625 | to_type = R_X86_64_GOTTPOFF; | |
1626 | } | |
1627 | ||
bedfd056 L |
1628 | /* When we are called from elf_x86_64_relocate_section, there may |
1629 | be additional transitions based on TLS_TYPE. */ | |
1630 | if (from_relocate_section) | |
142411ca L |
1631 | { |
1632 | unsigned int new_to_type = to_type; | |
1633 | ||
0e1862bb | 1634 | if (bfd_link_executable (info) |
142411ca L |
1635 | && h != NULL |
1636 | && h->dynindx == -1 | |
1637 | && tls_type == GOT_TLS_IE) | |
1638 | new_to_type = R_X86_64_TPOFF32; | |
1639 | ||
1640 | if (to_type == R_X86_64_TLSGD | |
1641 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1642 | || to_type == R_X86_64_TLSDESC_CALL) | |
1643 | { | |
1644 | if (tls_type == GOT_TLS_IE) | |
1645 | new_to_type = R_X86_64_GOTTPOFF; | |
1646 | } | |
1647 | ||
1648 | /* We checked the transition before when we were called from | |
351f65ca | 1649 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1650 | transition which hasn't been checked before. */ |
1651 | check = new_to_type != to_type && from_type == to_type; | |
1652 | to_type = new_to_type; | |
1653 | } | |
1654 | ||
1655 | break; | |
1656 | ||
bffbf940 | 1657 | case R_X86_64_TLSLD: |
0e1862bb | 1658 | if (bfd_link_executable (info)) |
142411ca L |
1659 | to_type = R_X86_64_TPOFF32; |
1660 | break; | |
1661 | ||
1662 | default: | |
1663 | return TRUE; | |
bffbf940 JJ |
1664 | } |
1665 | ||
142411ca L |
1666 | /* Return TRUE if there is no transition. */ |
1667 | if (from_type == to_type) | |
1668 | return TRUE; | |
1669 | ||
1670 | /* Check if the transition can be performed. */ | |
1671 | if (check | |
351f65ca L |
1672 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1673 | symtab_hdr, sym_hashes, | |
1674 | from_type, rel, relend)) | |
142411ca | 1675 | { |
2f629d23 | 1676 | reloc_howto_type *from, *to; |
4c544807 | 1677 | const char *name; |
142411ca | 1678 | |
351f65ca L |
1679 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1680 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1681 | |
4c544807 L |
1682 | if (h) |
1683 | name = h->root.root.string; | |
1684 | else | |
1685 | { | |
351f65ca | 1686 | struct elf_x86_64_link_hash_table *htab; |
4dfe6ac6 | 1687 | |
351f65ca | 1688 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1689 | if (htab == NULL) |
1690 | name = "*unknown*"; | |
1691 | else | |
1692 | { | |
1693 | Elf_Internal_Sym *isym; | |
1694 | ||
1695 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1696 | abfd, r_symndx); | |
1697 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1698 | } | |
4c544807 L |
1699 | } |
1700 | ||
4eca0228 | 1701 | _bfd_error_handler |
695344c0 | 1702 | /* xgettext:c-format */ |
142411ca L |
1703 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " |
1704 | "in section `%A' failed"), | |
4c544807 | 1705 | abfd, sec, from->name, to->name, name, |
142411ca L |
1706 | (unsigned long) rel->r_offset); |
1707 | bfd_set_error (bfd_error_bad_value); | |
1708 | return FALSE; | |
1709 | } | |
1710 | ||
1711 | *r_type = to_type; | |
1712 | return TRUE; | |
bffbf940 JJ |
1713 | } |
1714 | ||
c1d11331 L |
1715 | /* Rename some of the generic section flags to better document how they |
1716 | are used here. */ | |
338c190a L |
1717 | #define need_convert_load sec_flg0 |
1718 | #define check_relocs_failed sec_flg1 | |
1719 | ||
1720 | static bfd_boolean | |
1721 | elf_x86_64_need_pic (bfd *input_bfd, asection *sec, | |
1722 | struct elf_link_hash_entry *h, | |
1723 | Elf_Internal_Shdr *symtab_hdr, | |
1724 | Elf_Internal_Sym *isym, | |
1725 | reloc_howto_type *howto) | |
1726 | { | |
1727 | const char *v = ""; | |
1728 | const char *und = ""; | |
1729 | const char *pic = ""; | |
1730 | ||
1731 | const char *name; | |
1732 | if (h) | |
1733 | { | |
1734 | name = h->root.root.string; | |
1735 | switch (ELF_ST_VISIBILITY (h->other)) | |
1736 | { | |
1737 | case STV_HIDDEN: | |
1738 | v = _("hidden symbol "); | |
1739 | break; | |
1740 | case STV_INTERNAL: | |
1741 | v = _("internal symbol "); | |
1742 | break; | |
1743 | case STV_PROTECTED: | |
1744 | v = _("protected symbol "); | |
1745 | break; | |
1746 | default: | |
1747 | v = _("symbol "); | |
1748 | pic = _("; recompile with -fPIC"); | |
1749 | break; | |
1750 | } | |
1751 | ||
1752 | if (!h->def_regular && !h->def_dynamic) | |
1753 | und = _("undefined "); | |
1754 | } | |
1755 | else | |
1756 | { | |
1757 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL); | |
1758 | pic = _("; recompile with -fPIC"); | |
1759 | } | |
1760 | ||
695344c0 | 1761 | /* xgettext:c-format */ |
4eca0228 AM |
1762 | _bfd_error_handler (_("%B: relocation %s against %s%s`%s' can " |
1763 | "not be used when making a shared object%s"), | |
1764 | input_bfd, howto->name, und, v, name, pic); | |
338c190a L |
1765 | bfd_set_error (bfd_error_bad_value); |
1766 | sec->check_relocs_failed = 1; | |
1767 | return FALSE; | |
1768 | } | |
c1d11331 | 1769 | |
c175a657 L |
1770 | /* With the local symbol, foo, we convert |
1771 | mov foo@GOTPCREL(%rip), %reg | |
1772 | to | |
1773 | lea foo(%rip), %reg | |
1774 | and convert | |
1775 | call/jmp *foo@GOTPCREL(%rip) | |
1776 | to | |
1777 | nop call foo/jmp foo nop | |
1778 | When PIC is false, convert | |
1779 | test %reg, foo@GOTPCREL(%rip) | |
1780 | to | |
1781 | test $foo, %reg | |
1782 | and convert | |
1783 | binop foo@GOTPCREL(%rip), %reg | |
1784 | to | |
1785 | binop $foo, %reg | |
1786 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1787 | instructions. */ | |
1788 | ||
1789 | static bfd_boolean | |
1790 | elf_x86_64_convert_load_reloc (bfd *abfd, asection *sec, | |
1791 | bfd_byte *contents, | |
1792 | Elf_Internal_Rela *irel, | |
1793 | struct elf_link_hash_entry *h, | |
1794 | bfd_boolean *converted, | |
1795 | struct bfd_link_info *link_info) | |
1796 | { | |
1797 | struct elf_x86_64_link_hash_table *htab; | |
1798 | bfd_boolean is_pic; | |
1799 | bfd_boolean require_reloc_pc32; | |
1800 | bfd_boolean relocx; | |
1801 | bfd_boolean to_reloc_pc32; | |
1802 | asection *tsec; | |
1803 | char symtype; | |
1804 | bfd_signed_vma raddend; | |
1805 | unsigned int opcode; | |
1806 | unsigned int modrm; | |
1807 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
1808 | unsigned int r_symndx; | |
1809 | bfd_vma toff; | |
1810 | bfd_vma roff = irel->r_offset; | |
1811 | ||
1812 | if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2)) | |
1813 | return TRUE; | |
1814 | ||
1815 | raddend = irel->r_addend; | |
1816 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
1817 | if (raddend != -4) | |
1818 | return TRUE; | |
1819 | ||
1820 | htab = elf_x86_64_hash_table (link_info); | |
1821 | is_pic = bfd_link_pic (link_info); | |
1822 | ||
1823 | relocx = (r_type == R_X86_64_GOTPCRELX | |
1824 | || r_type == R_X86_64_REX_GOTPCRELX); | |
1825 | ||
1826 | /* TRUE if we can convert only to R_X86_64_PC32. Enable it for | |
1827 | --no-relax. */ | |
1828 | require_reloc_pc32 | |
1829 | = link_info->disable_target_specific_optimizations > 1; | |
1830 | ||
1831 | r_symndx = htab->r_sym (irel->r_info); | |
1832 | ||
1833 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1834 | ||
1835 | /* Convert mov to lea since it has been done for a while. */ | |
1836 | if (opcode != 0x8b) | |
1837 | { | |
1838 | /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX | |
1839 | for call, jmp or one of adc, add, and, cmp, or, sbb, sub, | |
1840 | test, xor instructions. */ | |
1841 | if (!relocx) | |
1842 | return TRUE; | |
1843 | } | |
1844 | ||
1845 | /* We convert only to R_X86_64_PC32: | |
1846 | 1. Branch. | |
1847 | 2. R_X86_64_GOTPCREL since we can't modify REX byte. | |
1848 | 3. require_reloc_pc32 is true. | |
1849 | 4. PIC. | |
1850 | */ | |
1851 | to_reloc_pc32 = (opcode == 0xff | |
1852 | || !relocx | |
1853 | || require_reloc_pc32 | |
1854 | || is_pic); | |
1855 | ||
1856 | /* Get the symbol referred to by the reloc. */ | |
1857 | if (h == NULL) | |
1858 | { | |
1859 | Elf_Internal_Sym *isym | |
1860 | = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx); | |
1861 | ||
1862 | /* Skip relocation against undefined symbols. */ | |
1863 | if (isym->st_shndx == SHN_UNDEF) | |
1864 | return TRUE; | |
1865 | ||
1866 | symtype = ELF_ST_TYPE (isym->st_info); | |
1867 | ||
1868 | if (isym->st_shndx == SHN_ABS) | |
1869 | tsec = bfd_abs_section_ptr; | |
1870 | else if (isym->st_shndx == SHN_COMMON) | |
1871 | tsec = bfd_com_section_ptr; | |
1872 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
1873 | tsec = &_bfd_elf_large_com_section; | |
1874 | else | |
1875 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1876 | ||
1877 | toff = isym->st_value; | |
1878 | } | |
1879 | else | |
1880 | { | |
1881 | /* Undefined weak symbol is only bound locally in executable | |
1882 | and its reference is resolved as 0 without relocation | |
1883 | overflow. We can only perform this optimization for | |
1884 | GOTPCRELX relocations since we need to modify REX byte. | |
1885 | It is OK convert mov with R_X86_64_GOTPCREL to | |
1886 | R_X86_64_PC32. */ | |
1887 | if ((relocx || opcode == 0x8b) | |
1888 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, | |
1889 | TRUE, | |
1890 | elf_x86_64_hash_entry (h))) | |
1891 | { | |
1892 | if (opcode == 0xff) | |
1893 | { | |
1894 | /* Skip for branch instructions since R_X86_64_PC32 | |
1895 | may overflow. */ | |
1896 | if (require_reloc_pc32) | |
1897 | return TRUE; | |
1898 | } | |
1899 | else if (relocx) | |
1900 | { | |
1901 | /* For non-branch instructions, we can convert to | |
1902 | R_X86_64_32/R_X86_64_32S since we know if there | |
1903 | is a REX byte. */ | |
1904 | to_reloc_pc32 = FALSE; | |
1905 | } | |
1906 | ||
1907 | /* Since we don't know the current PC when PIC is true, | |
1908 | we can't convert to R_X86_64_PC32. */ | |
1909 | if (to_reloc_pc32 && is_pic) | |
1910 | return TRUE; | |
1911 | ||
1912 | goto convert; | |
1913 | } | |
1914 | /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since | |
1915 | ld.so may use its link-time address. */ | |
1916 | else if ((h->def_regular | |
1917 | || h->root.type == bfd_link_hash_defined | |
1918 | || h->root.type == bfd_link_hash_defweak) | |
1919 | && h != htab->elf.hdynamic | |
1920 | && SYMBOL_REFERENCES_LOCAL (link_info, h)) | |
1921 | { | |
1922 | /* bfd_link_hash_new or bfd_link_hash_undefined is | |
1923 | set by an assignment in a linker script in | |
1924 | bfd_elf_record_link_assignment. */ | |
1925 | if (h->def_regular | |
1926 | && (h->root.type == bfd_link_hash_new | |
f02cb058 AM |
1927 | || h->root.type == bfd_link_hash_undefined |
1928 | || ((h->root.type == bfd_link_hash_defined | |
1929 | || h->root.type == bfd_link_hash_defweak) | |
1930 | && h->root.u.def.section == bfd_und_section_ptr))) | |
c175a657 L |
1931 | { |
1932 | /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */ | |
1933 | if (require_reloc_pc32) | |
1934 | return TRUE; | |
1935 | goto convert; | |
1936 | } | |
1937 | tsec = h->root.u.def.section; | |
1938 | toff = h->root.u.def.value; | |
1939 | symtype = h->type; | |
1940 | } | |
1941 | else | |
1942 | return TRUE; | |
1943 | } | |
1944 | ||
2168b268 L |
1945 | /* Don't convert GOTPCREL relocation against large section. */ |
1946 | if (elf_section_data (tsec) != NULL | |
1947 | && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0) | |
1948 | return TRUE; | |
1949 | ||
c175a657 L |
1950 | /* We can only estimate relocation overflow for R_X86_64_PC32. */ |
1951 | if (!to_reloc_pc32) | |
1952 | goto convert; | |
1953 | ||
1954 | if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE) | |
1955 | { | |
1956 | /* At this stage in linking, no SEC_MERGE symbol has been | |
1957 | adjusted, so all references to such symbols need to be | |
1958 | passed through _bfd_merged_section_offset. (Later, in | |
1959 | relocate_section, all SEC_MERGE symbols *except* for | |
1960 | section symbols have been adjusted.) | |
1961 | ||
1962 | gas may reduce relocations against symbols in SEC_MERGE | |
1963 | sections to a relocation against the section symbol when | |
1964 | the original addend was zero. When the reloc is against | |
1965 | a section symbol we should include the addend in the | |
1966 | offset passed to _bfd_merged_section_offset, since the | |
1967 | location of interest is the original symbol. On the | |
1968 | other hand, an access to "sym+addend" where "sym" is not | |
1969 | a section symbol should not include the addend; Such an | |
1970 | access is presumed to be an offset from "sym"; The | |
1971 | location of interest is just "sym". */ | |
1972 | if (symtype == STT_SECTION) | |
1973 | toff += raddend; | |
1974 | ||
1975 | toff = _bfd_merged_section_offset (abfd, &tsec, | |
1976 | elf_section_data (tsec)->sec_info, | |
1977 | toff); | |
1978 | ||
1979 | if (symtype != STT_SECTION) | |
1980 | toff += raddend; | |
1981 | } | |
1982 | else | |
1983 | toff += raddend; | |
1984 | ||
1985 | /* Don't convert if R_X86_64_PC32 relocation overflows. */ | |
1986 | if (tsec->output_section == sec->output_section) | |
1987 | { | |
1988 | if ((toff - roff + 0x80000000) > 0xffffffff) | |
1989 | return TRUE; | |
1990 | } | |
1991 | else | |
1992 | { | |
1993 | bfd_signed_vma distance; | |
1994 | ||
1995 | /* At this point, we don't know the load addresses of TSEC | |
1996 | section nor SEC section. We estimate the distrance between | |
1997 | SEC and TSEC. We store the estimated distances in the | |
1998 | compressed_size field of the output section, which is only | |
1999 | used to decompress the compressed input section. */ | |
2000 | if (sec->output_section->compressed_size == 0) | |
2001 | { | |
2002 | asection *asect; | |
2003 | bfd_size_type size = 0; | |
2004 | for (asect = link_info->output_bfd->sections; | |
2005 | asect != NULL; | |
2006 | asect = asect->next) | |
2007 | /* Skip debug sections since compressed_size is used to | |
2008 | compress debug sections. */ | |
2009 | if ((asect->flags & SEC_DEBUGGING) == 0) | |
2010 | { | |
2011 | asection *i; | |
2012 | for (i = asect->map_head.s; | |
2013 | i != NULL; | |
2014 | i = i->map_head.s) | |
2015 | { | |
2016 | size = align_power (size, i->alignment_power); | |
2017 | size += i->size; | |
2018 | } | |
2019 | asect->compressed_size = size; | |
2020 | } | |
2021 | } | |
2022 | ||
2023 | /* Don't convert GOTPCREL relocations if TSEC isn't placed | |
2024 | after SEC. */ | |
2025 | distance = (tsec->output_section->compressed_size | |
2026 | - sec->output_section->compressed_size); | |
2027 | if (distance < 0) | |
2028 | return TRUE; | |
2029 | ||
2030 | /* Take PT_GNU_RELRO segment into account by adding | |
2031 | maxpagesize. */ | |
2032 | if ((toff + distance + get_elf_backend_data (abfd)->maxpagesize | |
2033 | - roff + 0x80000000) > 0xffffffff) | |
2034 | return TRUE; | |
2035 | } | |
2036 | ||
2037 | convert: | |
2038 | if (opcode == 0xff) | |
2039 | { | |
2040 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
2041 | unsigned int nop; | |
2042 | unsigned int disp; | |
2043 | bfd_vma nop_offset; | |
2044 | ||
2045 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
2046 | R_X86_64_PC32. */ | |
2047 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
2048 | if (modrm == 0x25) | |
2049 | { | |
2050 | /* Convert to "jmp foo nop". */ | |
2051 | modrm = 0xe9; | |
2052 | nop = NOP_OPCODE; | |
2053 | nop_offset = irel->r_offset + 3; | |
2054 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
2055 | irel->r_offset -= 1; | |
2056 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
2057 | } | |
2058 | else | |
2059 | { | |
e2cbcd91 L |
2060 | struct elf_x86_64_link_hash_entry *eh |
2061 | = (struct elf_x86_64_link_hash_entry *) h; | |
2062 | ||
c175a657 L |
2063 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
2064 | is a nop prefix. */ | |
2065 | modrm = 0xe8; | |
e2cbcd91 L |
2066 | /* To support TLS optimization, always use addr32 prefix for |
2067 | "call *__tls_get_addr@GOTPCREL(%rip)". */ | |
2068 | if (eh && eh->tls_get_addr == 1) | |
c175a657 | 2069 | { |
e2cbcd91 L |
2070 | nop = 0x67; |
2071 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
2072 | } |
2073 | else | |
e2cbcd91 L |
2074 | { |
2075 | nop = link_info->call_nop_byte; | |
2076 | if (link_info->call_nop_as_suffix) | |
2077 | { | |
2078 | nop_offset = irel->r_offset + 3; | |
2079 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
2080 | irel->r_offset -= 1; | |
2081 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
2082 | } | |
2083 | else | |
2084 | nop_offset = irel->r_offset - 2; | |
2085 | } | |
c175a657 L |
2086 | } |
2087 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
2088 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
2089 | r_type = R_X86_64_PC32; | |
2090 | } | |
2091 | else | |
2092 | { | |
2093 | unsigned int rex; | |
2094 | unsigned int rex_mask = REX_R; | |
2095 | ||
2096 | if (r_type == R_X86_64_REX_GOTPCRELX) | |
2097 | rex = bfd_get_8 (abfd, contents + roff - 3); | |
2098 | else | |
2099 | rex = 0; | |
2100 | ||
2101 | if (opcode == 0x8b) | |
2102 | { | |
2103 | if (to_reloc_pc32) | |
2104 | { | |
2105 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
2106 | "lea foo(%rip), %reg". */ | |
2107 | opcode = 0x8d; | |
2108 | r_type = R_X86_64_PC32; | |
2109 | } | |
2110 | else | |
2111 | { | |
2112 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
2113 | "mov $foo, %reg". */ | |
2114 | opcode = 0xc7; | |
2115 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
2116 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
2117 | if ((rex & REX_W) != 0 | |
2118 | && ABI_64_P (link_info->output_bfd)) | |
2119 | { | |
2120 | /* Keep the REX_W bit in REX byte for LP64. */ | |
2121 | r_type = R_X86_64_32S; | |
2122 | goto rewrite_modrm_rex; | |
2123 | } | |
2124 | else | |
2125 | { | |
2126 | /* If the REX_W bit in REX byte isn't needed, | |
2127 | use R_X86_64_32 and clear the W bit to avoid | |
2128 | sign-extend imm32 to imm64. */ | |
2129 | r_type = R_X86_64_32; | |
2130 | /* Clear the W bit in REX byte. */ | |
2131 | rex_mask |= REX_W; | |
2132 | goto rewrite_modrm_rex; | |
2133 | } | |
2134 | } | |
2135 | } | |
2136 | else | |
2137 | { | |
2138 | /* R_X86_64_PC32 isn't supported. */ | |
2139 | if (to_reloc_pc32) | |
2140 | return TRUE; | |
2141 | ||
2142 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
2143 | if (opcode == 0x85) | |
2144 | { | |
2145 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
2146 | "test $foo, %reg". */ | |
2147 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
2148 | opcode = 0xf7; | |
2149 | } | |
2150 | else | |
2151 | { | |
2152 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
2153 | "binop $foo, %reg". */ | |
2154 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
2155 | opcode = 0x81; | |
2156 | } | |
2157 | ||
2158 | /* Use R_X86_64_32 with 32-bit operand to avoid relocation | |
2159 | overflow when sign-extending imm32 to imm64. */ | |
2160 | r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32; | |
2161 | ||
2162 | rewrite_modrm_rex: | |
2163 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
2164 | ||
2165 | if (rex) | |
2166 | { | |
2167 | /* Move the R bit to the B bit in REX byte. */ | |
2168 | rex = (rex & ~rex_mask) | (rex & REX_R) >> 2; | |
2169 | bfd_put_8 (abfd, rex, contents + roff - 3); | |
2170 | } | |
2171 | ||
2172 | /* No addend for R_X86_64_32/R_X86_64_32S relocations. */ | |
2173 | irel->r_addend = 0; | |
2174 | } | |
2175 | ||
2176 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
2177 | } | |
2178 | ||
2179 | irel->r_info = htab->r_info (r_symndx, r_type); | |
2180 | ||
2181 | *converted = TRUE; | |
2182 | ||
2183 | return TRUE; | |
2184 | } | |
2185 | ||
70256ad8 | 2186 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
2187 | calculate needed space in the global offset table, procedure |
2188 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 2189 | |
b34976b6 | 2190 | static bfd_boolean |
351f65ca L |
2191 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
2192 | asection *sec, | |
2193 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 2194 | { |
351f65ca | 2195 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2196 | Elf_Internal_Shdr *symtab_hdr; |
2197 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
2198 | const Elf_Internal_Rela *rel; |
2199 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 2200 | asection *sreloc; |
bedfd056 | 2201 | bfd_byte *contents; |
dd7e64d4 | 2202 | bfd_boolean use_plt_got; |
70256ad8 | 2203 | |
0e1862bb | 2204 | if (bfd_link_relocatable (info)) |
b34976b6 | 2205 | return TRUE; |
70256ad8 | 2206 | |
081b1afe L |
2207 | /* Don't do anything special with non-loaded, non-alloced sections. |
2208 | In particular, any relocs in such sections should not affect GOT | |
2209 | and PLT reference counting (ie. we don't allow them to create GOT | |
2210 | or PLT entries), there's no possibility or desire to optimize TLS | |
2211 | relocs, and there's not much point in propagating relocs to shared | |
2212 | libs that the dynamic linker won't relocate. */ | |
2213 | if ((sec->flags & SEC_ALLOC) == 0) | |
2214 | return TRUE; | |
2215 | ||
0ffa91dd NC |
2216 | BFD_ASSERT (is_x86_64_elf (abfd)); |
2217 | ||
351f65ca | 2218 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 | 2219 | if (htab == NULL) |
afd9acee L |
2220 | { |
2221 | sec->check_relocs_failed = 1; | |
2222 | return FALSE; | |
2223 | } | |
4dfe6ac6 | 2224 | |
bedfd056 L |
2225 | /* Get the section contents. */ |
2226 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2227 | contents = elf_section_data (sec)->this_hdr.contents; | |
2228 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2229 | { | |
2230 | sec->check_relocs_failed = 1; | |
2231 | return FALSE; | |
2232 | } | |
2233 | ||
dd7e64d4 L |
2234 | use_plt_got = get_elf_x86_64_backend_data (abfd) == &elf_x86_64_arch_bed; |
2235 | ||
0ffa91dd | 2236 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 2237 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 2238 | |
c434dee6 | 2239 | sreloc = NULL; |
cbe950e9 | 2240 | |
70256ad8 AJ |
2241 | rel_end = relocs + sec->reloc_count; |
2242 | for (rel = relocs; rel < rel_end; rel++) | |
2243 | { | |
bffbf940 | 2244 | unsigned int r_type; |
70256ad8 AJ |
2245 | unsigned long r_symndx; |
2246 | struct elf_link_hash_entry *h; | |
aec6b87e | 2247 | struct elf_x86_64_link_hash_entry *eh; |
4c544807 L |
2248 | Elf_Internal_Sym *isym; |
2249 | const char *name; | |
06a6a421 | 2250 | bfd_boolean size_reloc; |
70256ad8 | 2251 | |
351f65ca L |
2252 | r_symndx = htab->r_sym (rel->r_info); |
2253 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
2254 | |
2255 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
2256 | { | |
695344c0 | 2257 | /* xgettext:c-format */ |
4eca0228 AM |
2258 | _bfd_error_handler (_("%B: bad symbol index: %d"), |
2259 | abfd, r_symndx); | |
afd9acee | 2260 | goto error_return; |
c434dee6 AJ |
2261 | } |
2262 | ||
70256ad8 | 2263 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
2264 | { |
2265 | /* A local symbol. */ | |
c2e61a4e L |
2266 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
2267 | abfd, r_symndx); | |
2268 | if (isym == NULL) | |
afd9acee | 2269 | goto error_return; |
c25bc9fc L |
2270 | |
2271 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 2272 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 2273 | { |
351f65ca L |
2274 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, |
2275 | TRUE); | |
c25bc9fc | 2276 | if (h == NULL) |
afd9acee | 2277 | goto error_return; |
6bbec505 | 2278 | |
c25bc9fc L |
2279 | /* Fake a STT_GNU_IFUNC symbol. */ |
2280 | h->type = STT_GNU_IFUNC; | |
2281 | h->def_regular = 1; | |
2282 | h->ref_regular = 1; | |
2283 | h->forced_local = 1; | |
2284 | h->root.type = bfd_link_hash_defined; | |
2285 | } | |
2286 | else | |
2287 | h = NULL; | |
2288 | } | |
70256ad8 | 2289 | else |
71cb9464 | 2290 | { |
4c544807 | 2291 | isym = NULL; |
71cb9464 L |
2292 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
2293 | while (h->root.type == bfd_link_hash_indirect | |
2294 | || h->root.type == bfd_link_hash_warning) | |
2295 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 2296 | } |
cbe950e9 | 2297 | |
d1534d16 L |
2298 | /* Check invalid x32 relocations. */ |
2299 | if (!ABI_64_P (abfd)) | |
2300 | switch (r_type) | |
2301 | { | |
2302 | default: | |
2303 | break; | |
2304 | ||
d1534d16 L |
2305 | case R_X86_64_DTPOFF64: |
2306 | case R_X86_64_TPOFF64: | |
2307 | case R_X86_64_PC64: | |
2308 | case R_X86_64_GOTOFF64: | |
2309 | case R_X86_64_GOT64: | |
2310 | case R_X86_64_GOTPCREL64: | |
2311 | case R_X86_64_GOTPC64: | |
2312 | case R_X86_64_GOTPLT64: | |
2313 | case R_X86_64_PLTOFF64: | |
2314 | { | |
2315 | if (h) | |
2316 | name = h->root.root.string; | |
2317 | else | |
2318 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
2319 | NULL); | |
4eca0228 | 2320 | _bfd_error_handler |
695344c0 | 2321 | /* xgettext:c-format */ |
d1534d16 L |
2322 | (_("%B: relocation %s against symbol `%s' isn't " |
2323 | "supported in x32 mode"), abfd, | |
2324 | x86_64_elf_howto_table[r_type].name, name); | |
2325 | bfd_set_error (bfd_error_bad_value); | |
afd9acee | 2326 | goto error_return; |
d1534d16 L |
2327 | } |
2328 | break; | |
2329 | } | |
2330 | ||
c25bc9fc L |
2331 | if (h != NULL) |
2332 | { | |
cbe950e9 L |
2333 | switch (r_type) |
2334 | { | |
2335 | default: | |
2336 | break; | |
2337 | ||
0ff2b86e L |
2338 | case R_X86_64_PC32_BND: |
2339 | case R_X86_64_PLT32_BND: | |
d258b828 IZ |
2340 | case R_X86_64_PC32: |
2341 | case R_X86_64_PLT32: | |
2342 | case R_X86_64_32: | |
2343 | case R_X86_64_64: | |
0ff2b86e L |
2344 | /* MPX PLT is supported only if elf_x86_64_arch_bed |
2345 | is used in 64-bit mode. */ | |
2346 | if (ABI_64_P (abfd) | |
8361ed4d L |
2347 | && info->bndplt |
2348 | && (get_elf_x86_64_backend_data (abfd) | |
2349 | == &elf_x86_64_arch_bed)) | |
0ff2b86e | 2350 | { |
bc696fd5 | 2351 | elf_x86_64_hash_entry (h)->has_bnd_reloc = 1; |
0ff2b86e L |
2352 | |
2353 | /* Create the second PLT for Intel MPX support. */ | |
2354 | if (htab->plt_bnd == NULL) | |
2355 | { | |
0ff2b86e L |
2356 | const struct elf_backend_data *bed; |
2357 | ||
2358 | bed = get_elf_backend_data (info->output_bfd); | |
6db50b4c L |
2359 | BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry) == 8 |
2360 | && (sizeof (elf_x86_64_bnd_plt2_entry) | |
2361 | == sizeof (elf_x86_64_legacy_plt2_entry))); | |
0ff2b86e L |
2362 | |
2363 | if (htab->elf.dynobj == NULL) | |
2364 | htab->elf.dynobj = abfd; | |
2365 | htab->plt_bnd | |
2366 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
2367 | ".plt.bnd", | |
2368 | (bed->dynamic_sec_flags | |
2369 | | SEC_ALLOC | |
2370 | | SEC_CODE | |
2371 | | SEC_LOAD | |
2372 | | SEC_READONLY)); | |
2373 | if (htab->plt_bnd == NULL | |
2374 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
2375 | htab->plt_bnd, | |
8361ed4d L |
2376 | 3)) |
2377 | goto error_return; | |
2378 | } | |
2379 | ||
2380 | if (!info->no_ld_generated_unwind_info | |
2381 | && htab->plt_bnd_eh_frame == NULL) | |
2382 | { | |
2383 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | |
2384 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
2385 | | SEC_LINKER_CREATED); | |
2386 | htab->plt_bnd_eh_frame | |
2387 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
2388 | ".eh_frame", | |
2389 | flags); | |
2390 | if (htab->plt_bnd_eh_frame == NULL | |
2391 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
2392 | htab->plt_bnd_eh_frame, | |
2393 | 3)) | |
afd9acee | 2394 | goto error_return; |
0ff2b86e L |
2395 | } |
2396 | } | |
1a0670f3 | 2397 | /* Fall through. */ |
0ff2b86e | 2398 | |
cbe950e9 | 2399 | case R_X86_64_32S: |
cbe950e9 | 2400 | case R_X86_64_PC64: |
cbe950e9 | 2401 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
2402 | case R_X86_64_GOTPCRELX: |
2403 | case R_X86_64_REX_GOTPCRELX: | |
cbe950e9 | 2404 | case R_X86_64_GOTPCREL64: |
9d4057ee AM |
2405 | if (htab->elf.dynobj == NULL) |
2406 | htab->elf.dynobj = abfd; | |
466ee2af L |
2407 | /* Create the ifunc sections for static executables. */ |
2408 | if (h->type == STT_GNU_IFUNC | |
2409 | && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj, | |
2410 | info)) | |
afd9acee | 2411 | goto error_return; |
cbe950e9 L |
2412 | break; |
2413 | } | |
2414 | ||
ad1e85de L |
2415 | /* It is referenced by a non-shared object. */ |
2416 | h->ref_regular = 1; | |
61315175 | 2417 | h->root.non_ir_ref = 1; |
13a2df29 L |
2418 | |
2419 | if (h->type == STT_GNU_IFUNC) | |
2420 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
2421 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 2422 | } |
70256ad8 | 2423 | |
bedfd056 | 2424 | if (! elf_x86_64_tls_transition (info, abfd, sec, contents, |
351f65ca L |
2425 | symtab_hdr, sym_hashes, |
2426 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 2427 | rel, rel_end, h, r_symndx, FALSE)) |
afd9acee | 2428 | goto error_return; |
142411ca | 2429 | |
aec6b87e | 2430 | eh = (struct elf_x86_64_link_hash_entry *) h; |
bffbf940 | 2431 | switch (r_type) |
70256ad8 | 2432 | { |
bffbf940 JJ |
2433 | case R_X86_64_TLSLD: |
2434 | htab->tls_ld_got.refcount += 1; | |
2435 | goto create_got; | |
2436 | ||
2437 | case R_X86_64_TPOFF32: | |
0e1862bb | 2438 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
338c190a L |
2439 | return elf_x86_64_need_pic (abfd, sec, h, symtab_hdr, isym, |
2440 | &x86_64_elf_howto_table[r_type]); | |
aec6b87e L |
2441 | if (eh != NULL) |
2442 | eh->has_got_reloc = 1; | |
bffbf940 | 2443 | break; |
c434dee6 | 2444 | |
bffbf940 | 2445 | case R_X86_64_GOTTPOFF: |
0e1862bb | 2446 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
2447 | info->flags |= DF_STATIC_TLS; |
2448 | /* Fall through */ | |
70256ad8 | 2449 | |
bffbf940 JJ |
2450 | case R_X86_64_GOT32: |
2451 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
2452 | case R_X86_64_GOTPCRELX: |
2453 | case R_X86_64_REX_GOTPCRELX: | |
bffbf940 | 2454 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
2455 | case R_X86_64_GOT64: |
2456 | case R_X86_64_GOTPCREL64: | |
2457 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
2458 | case R_X86_64_GOTPC32_TLSDESC: |
2459 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
2460 | /* This symbol requires a global offset table entry. */ |
2461 | { | |
2462 | int tls_type, old_tls_type; | |
2463 | ||
2464 | switch (r_type) | |
2465 | { | |
2466 | default: tls_type = GOT_NORMAL; break; | |
2467 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
2468 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
2469 | case R_X86_64_GOTPC32_TLSDESC: |
2470 | case R_X86_64_TLSDESC_CALL: | |
2471 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
2472 | } |
2473 | ||
2474 | if (h != NULL) | |
2475 | { | |
2476 | h->got.refcount += 1; | |
aec6b87e | 2477 | old_tls_type = eh->tls_type; |
bffbf940 JJ |
2478 | } |
2479 | else | |
2480 | { | |
2481 | bfd_signed_vma *local_got_refcounts; | |
2482 | ||
2483 | /* This is a global offset table entry for a local symbol. */ | |
2484 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2485 | if (local_got_refcounts == NULL) | |
2486 | { | |
2487 | bfd_size_type size; | |
2488 | ||
2489 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
2490 | size *= sizeof (bfd_signed_vma) |
2491 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
2492 | local_got_refcounts = ((bfd_signed_vma *) |
2493 | bfd_zalloc (abfd, size)); | |
2494 | if (local_got_refcounts == NULL) | |
afd9acee | 2495 | goto error_return; |
bffbf940 | 2496 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
351f65ca | 2497 | elf_x86_64_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 2498 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
351f65ca | 2499 | elf_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 2500 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
2501 | } |
2502 | local_got_refcounts[r_symndx] += 1; | |
2503 | old_tls_type | |
351f65ca | 2504 | = elf_x86_64_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
2505 | } |
2506 | ||
2507 | /* If a TLS symbol is accessed using IE at least once, | |
2508 | there is no point to use dynamic model for it. */ | |
2509 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
2510 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
2511 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 2512 | { |
67a4f2b7 | 2513 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 2514 | tls_type = old_tls_type; |
67a4f2b7 AO |
2515 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2516 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2517 | tls_type |= old_tls_type; | |
bffbf940 JJ |
2518 | else |
2519 | { | |
09a24cbf | 2520 | if (h) |
4c544807 L |
2521 | name = h->root.root.string; |
2522 | else | |
2523 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
2524 | isym, NULL); | |
4eca0228 | 2525 | _bfd_error_handler |
695344c0 | 2526 | /* xgettext:c-format */ |
1f7a4e42 | 2527 | (_("%B: '%s' accessed both as normal and thread local symbol"), |
4c544807 | 2528 | abfd, name); |
68c4a57e | 2529 | bfd_set_error (bfd_error_bad_value); |
afd9acee | 2530 | goto error_return; |
bffbf940 JJ |
2531 | } |
2532 | } | |
2533 | ||
2534 | if (old_tls_type != tls_type) | |
2535 | { | |
aec6b87e L |
2536 | if (eh != NULL) |
2537 | eh->tls_type = tls_type; | |
bffbf940 | 2538 | else |
351f65ca | 2539 | elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
2540 | } |
2541 | } | |
c434dee6 AJ |
2542 | /* Fall through */ |
2543 | ||
d6ab8113 JB |
2544 | case R_X86_64_GOTOFF64: |
2545 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2546 | case R_X86_64_GOTPC64: |
bffbf940 | 2547 | create_got: |
aec6b87e L |
2548 | if (eh != NULL) |
2549 | eh->has_got_reloc = 1; | |
6de2ae4a | 2550 | if (htab->elf.sgot == NULL) |
c434dee6 AJ |
2551 | { |
2552 | if (htab->elf.dynobj == NULL) | |
2553 | htab->elf.dynobj = abfd; | |
6de2ae4a L |
2554 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, |
2555 | info)) | |
afd9acee | 2556 | goto error_return; |
c434dee6 | 2557 | } |
70256ad8 AJ |
2558 | break; |
2559 | ||
2560 | case R_X86_64_PLT32: | |
c3320543 | 2561 | case R_X86_64_PLT32_BND: |
70256ad8 | 2562 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
2563 | actually build the entry in adjust_dynamic_symbol, |
2564 | because this might be a case of linking PIC code which is | |
2565 | never referenced by a dynamic object, in which case we | |
2566 | don't need to generate a procedure linkage table entry | |
2567 | after all. */ | |
70256ad8 AJ |
2568 | |
2569 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 2570 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
2571 | if (h == NULL) |
2572 | continue; | |
2573 | ||
aec6b87e | 2574 | eh->has_got_reloc = 1; |
f5385ebf | 2575 | h->needs_plt = 1; |
51b64d56 | 2576 | h->plt.refcount += 1; |
70256ad8 AJ |
2577 | break; |
2578 | ||
7b81dfbb AJ |
2579 | case R_X86_64_PLTOFF64: |
2580 | /* This tries to form the 'address' of a function relative | |
2581 | to GOT. For global symbols we need a PLT entry. */ | |
2582 | if (h != NULL) | |
2583 | { | |
2584 | h->needs_plt = 1; | |
2585 | h->plt.refcount += 1; | |
2586 | } | |
2587 | goto create_got; | |
2588 | ||
6a3e1bae L |
2589 | case R_X86_64_SIZE32: |
2590 | case R_X86_64_SIZE64: | |
06a6a421 | 2591 | size_reloc = TRUE; |
6a3e1bae L |
2592 | goto do_size; |
2593 | ||
248775ba L |
2594 | case R_X86_64_32: |
2595 | if (!ABI_64_P (abfd)) | |
2596 | goto pointer; | |
1a0670f3 | 2597 | /* Fall through. */ |
cc78d0af AJ |
2598 | case R_X86_64_8: |
2599 | case R_X86_64_16: | |
70256ad8 | 2600 | case R_X86_64_32S: |
338c190a L |
2601 | /* Check relocation overflow as these relocs may lead to |
2602 | run-time relocation overflow. Don't error out for | |
1b71fb54 | 2603 | sections we don't care about, such as debug sections or |
338c190a | 2604 | when relocation overflow check is disabled. */ |
4c10bbaa | 2605 | if (!info->no_reloc_overflow_check |
338c190a L |
2606 | && (bfd_link_pic (info) |
2607 | || (bfd_link_executable (info) | |
2608 | && h != NULL | |
2609 | && !h->def_regular | |
2610 | && h->def_dynamic | |
081b1afe | 2611 | && (sec->flags & SEC_READONLY) == 0))) |
338c190a L |
2612 | return elf_x86_64_need_pic (abfd, sec, h, symtab_hdr, isym, |
2613 | &x86_64_elf_howto_table[r_type]); | |
1b71fb54 AJ |
2614 | /* Fall through. */ |
2615 | ||
c434dee6 AJ |
2616 | case R_X86_64_PC8: |
2617 | case R_X86_64_PC16: | |
70256ad8 | 2618 | case R_X86_64_PC32: |
c3320543 | 2619 | case R_X86_64_PC32_BND: |
d6ab8113 | 2620 | case R_X86_64_PC64: |
1b71fb54 | 2621 | case R_X86_64_64: |
248775ba | 2622 | pointer: |
aec6b87e L |
2623 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
2624 | eh->has_non_got_reloc = 1; | |
bf52d7c7 L |
2625 | /* We are called after all symbols have been resolved. Only |
2626 | relocation against STT_GNU_IFUNC symbol must go through | |
2627 | PLT. */ | |
d1ed1c7d L |
2628 | if (h != NULL |
2629 | && (bfd_link_executable (info) | |
bf52d7c7 | 2630 | || h->type == STT_GNU_IFUNC)) |
c434dee6 AJ |
2631 | { |
2632 | /* If this reloc is in a read-only section, we might | |
2633 | need a copy reloc. We can't check reliably at this | |
2634 | stage whether the section is read-only, as input | |
2635 | sections have not yet been mapped to output sections. | |
2636 | Tentatively set the flag for now, and correct in | |
2637 | adjust_dynamic_symbol. */ | |
f5385ebf | 2638 | h->non_got_ref = 1; |
c434dee6 | 2639 | |
233cc9c1 L |
2640 | /* We may need a .plt entry if the symbol is a function |
2641 | defined in a shared lib or is a STT_GNU_IFUNC function | |
2642 | referenced from the code or read-only section. */ | |
2643 | if (!h->def_regular | |
2644 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
2645 | h->plt.refcount += 1; | |
2646 | ||
5db4f0d3 L |
2647 | if (r_type == R_X86_64_PC32) |
2648 | { | |
2649 | /* Since something like ".long foo - ." may be used | |
2650 | as pointer, make sure that PLT is used if foo is | |
2651 | a function defined in a shared library. */ | |
2652 | if ((sec->flags & SEC_CODE) == 0) | |
2653 | h->pointer_equality_needed = 1; | |
2654 | } | |
2655 | else if (r_type != R_X86_64_PC32_BND | |
2656 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
2657 | { |
2658 | h->pointer_equality_needed = 1; | |
2659 | /* At run-time, R_X86_64_64 can be resolved for both | |
2660 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
2661 | can only be resolved for x32. */ | |
2662 | if ((sec->flags & SEC_READONLY) == 0 | |
2663 | && (r_type == R_X86_64_64 | |
2664 | || (!ABI_64_P (abfd) | |
2665 | && (r_type == R_X86_64_32 | |
2666 | || r_type == R_X86_64_32S)))) | |
aec6b87e | 2667 | eh->func_pointer_refcount += 1; |
04ebc307 | 2668 | } |
c434dee6 | 2669 | } |
70256ad8 | 2670 | |
06a6a421 | 2671 | size_reloc = FALSE; |
6a3e1bae | 2672 | do_size: |
70256ad8 AJ |
2673 | /* If we are creating a shared library, and this is a reloc |
2674 | against a global symbol, or a non PC relative reloc | |
2675 | against a local symbol, then we need to copy the reloc | |
2676 | into the shared library. However, if we are linking with | |
2677 | -Bsymbolic, we do not need to copy a reloc against a | |
2678 | global symbol which is defined in an object we are | |
407443a3 | 2679 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
2680 | this point we have not seen all the input files, so it is |
2681 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
2682 | later (it is never cleared). In case of a weak definition, |
2683 | DEF_REGULAR may be cleared later by a strong definition in | |
2684 | a shared library. We account for that possibility below by | |
2685 | storing information in the relocs_copied field of the hash | |
2686 | table entry. A similar situation occurs when creating | |
2687 | shared libraries and symbol visibility changes render the | |
31c0ebfe | 2688 | symbol local. |
c434dee6 AJ |
2689 | |
2690 | If on the other hand, we are creating an executable, we | |
2691 | may need to keep relocations for symbols satisfied by a | |
2692 | dynamic library if we manage to avoid copy relocs for the | |
233cc9c1 L |
2693 | symbol. |
2694 | ||
2695 | Generate dynamic pointer relocation against STT_GNU_IFUNC | |
2696 | symbol in the non-code section. */ | |
081b1afe L |
2697 | if ((bfd_link_pic (info) |
2698 | && (! IS_X86_64_PCREL_TYPE (r_type) | |
2699 | || (h != NULL | |
2700 | && (! (bfd_link_pie (info) | |
2701 | || SYMBOLIC_BIND (info, h)) | |
2702 | || h->root.type == bfd_link_hash_defweak | |
2703 | || !h->def_regular)))) | |
233cc9c1 L |
2704 | || (h != NULL |
2705 | && h->type == STT_GNU_IFUNC | |
2706 | && r_type == htab->pointer_r_type | |
2707 | && (sec->flags & SEC_CODE) == 0) | |
081b1afe L |
2708 | || (ELIMINATE_COPY_RELOCS |
2709 | && !bfd_link_pic (info) | |
2710 | && h != NULL | |
2711 | && (h->root.type == bfd_link_hash_defweak | |
2712 | || !h->def_regular))) | |
70256ad8 | 2713 | { |
e03a8ed8 L |
2714 | struct elf_dyn_relocs *p; |
2715 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2716 | |
2717 | /* We must copy these reloc types into the output file. | |
2718 | Create a reloc section in dynobj and make room for | |
2719 | this reloc. */ | |
70256ad8 AJ |
2720 | if (sreloc == NULL) |
2721 | { | |
c434dee6 AJ |
2722 | if (htab->elf.dynobj == NULL) |
2723 | htab->elf.dynobj = abfd; | |
2724 | ||
83bac4b0 | 2725 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
2726 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
2727 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 2728 | |
70256ad8 | 2729 | if (sreloc == NULL) |
afd9acee | 2730 | goto error_return; |
70256ad8 AJ |
2731 | } |
2732 | ||
c434dee6 AJ |
2733 | /* If this is a global symbol, we count the number of |
2734 | relocations we need for this symbol. */ | |
2735 | if (h != NULL) | |
aec6b87e | 2736 | head = &eh->dyn_relocs; |
c434dee6 AJ |
2737 | else |
2738 | { | |
2739 | /* Track dynamic relocs needed for local syms too. | |
2740 | We really need local syms available to do this | |
2741 | easily. Oh well. */ | |
c434dee6 | 2742 | asection *s; |
87d72d41 | 2743 | void **vpp; |
87d72d41 AM |
2744 | |
2745 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2746 | abfd, r_symndx); | |
2747 | if (isym == NULL) | |
afd9acee | 2748 | goto error_return; |
87d72d41 AM |
2749 | |
2750 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2751 | if (s == NULL) |
87d72d41 | 2752 | s = sec; |
70256ad8 | 2753 | |
e81d3500 DD |
2754 | /* Beware of type punned pointers vs strict aliasing |
2755 | rules. */ | |
2756 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2757 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2758 | } |
70256ad8 | 2759 | |
c434dee6 AJ |
2760 | p = *head; |
2761 | if (p == NULL || p->sec != sec) | |
2762 | { | |
2763 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 2764 | |
e03a8ed8 | 2765 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2766 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2767 | if (p == NULL) |
afd9acee | 2768 | goto error_return; |
c434dee6 AJ |
2769 | p->next = *head; |
2770 | *head = p; | |
2771 | p->sec = sec; | |
2772 | p->count = 0; | |
2773 | p->pc_count = 0; | |
70256ad8 | 2774 | } |
c434dee6 AJ |
2775 | |
2776 | p->count += 1; | |
06a6a421 L |
2777 | /* Count size relocation as PC-relative relocation. */ |
2778 | if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc) | |
c434dee6 | 2779 | p->pc_count += 1; |
70256ad8 AJ |
2780 | } |
2781 | break; | |
fe4770f4 AJ |
2782 | |
2783 | /* This relocation describes the C++ object vtable hierarchy. | |
2784 | Reconstruct it for later use during GC. */ | |
2785 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2786 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
afd9acee | 2787 | goto error_return; |
fe4770f4 AJ |
2788 | break; |
2789 | ||
2790 | /* This relocation describes which C++ vtable entries are actually | |
2791 | used. Record for later use during GC. */ | |
2792 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
2793 | BFD_ASSERT (h != NULL); |
2794 | if (h != NULL | |
2795 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
afd9acee | 2796 | goto error_return; |
fe4770f4 | 2797 | break; |
c434dee6 AJ |
2798 | |
2799 | default: | |
2800 | break; | |
70256ad8 | 2801 | } |
dd7e64d4 L |
2802 | |
2803 | if (use_plt_got | |
2804 | && h != NULL | |
2805 | && h->plt.refcount > 0 | |
8ded2ddc L |
2806 | && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
2807 | || h->got.refcount > 0) | |
dd7e64d4 L |
2808 | && htab->plt_got == NULL) |
2809 | { | |
2810 | /* Create the GOT procedure linkage table. */ | |
2811 | unsigned int plt_got_align; | |
2812 | const struct elf_backend_data *bed; | |
2813 | ||
2814 | bed = get_elf_backend_data (info->output_bfd); | |
2815 | BFD_ASSERT (sizeof (elf_x86_64_legacy_plt2_entry) == 8 | |
2816 | && (sizeof (elf_x86_64_bnd_plt2_entry) | |
2817 | == sizeof (elf_x86_64_legacy_plt2_entry))); | |
2818 | plt_got_align = 3; | |
2819 | ||
2820 | if (htab->elf.dynobj == NULL) | |
2821 | htab->elf.dynobj = abfd; | |
2822 | htab->plt_got | |
2823 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
2824 | ".plt.got", | |
2825 | (bed->dynamic_sec_flags | |
2826 | | SEC_ALLOC | |
2827 | | SEC_CODE | |
2828 | | SEC_LOAD | |
2829 | | SEC_READONLY)); | |
2830 | if (htab->plt_got == NULL | |
2831 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
2832 | htab->plt_got, | |
2833 | plt_got_align)) | |
afd9acee | 2834 | goto error_return; |
fff53dae L |
2835 | |
2836 | if (!info->no_ld_generated_unwind_info | |
2837 | && htab->plt_got_eh_frame == NULL | |
2838 | && get_elf_x86_64_backend_data (abfd)->eh_frame_plt_got != NULL) | |
2839 | { | |
2840 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | |
2841 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
2842 | | SEC_LINKER_CREATED); | |
2843 | htab->plt_got_eh_frame | |
2844 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
2845 | ".eh_frame", | |
2846 | flags); | |
2847 | if (htab->plt_got_eh_frame == NULL | |
2848 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
2849 | htab->plt_got_eh_frame, | |
52b232b3 | 2850 | ABI_64_P (htab->elf.dynobj) ? 3 : 2)) |
fff53dae L |
2851 | goto error_return; |
2852 | } | |
dd7e64d4 | 2853 | } |
c1d11331 | 2854 | |
56ceb5b5 L |
2855 | if ((r_type == R_X86_64_GOTPCREL |
2856 | || r_type == R_X86_64_GOTPCRELX | |
2857 | || r_type == R_X86_64_REX_GOTPCRELX) | |
c1d11331 | 2858 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
56ceb5b5 | 2859 | sec->need_convert_load = 1; |
70256ad8 AJ |
2860 | } |
2861 | ||
bedfd056 L |
2862 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2863 | { | |
2864 | if (!info->keep_memory) | |
2865 | free (contents); | |
2866 | else | |
2867 | { | |
2868 | /* Cache the section contents for elf_link_input_bfd. */ | |
2869 | elf_section_data (sec)->this_hdr.contents = contents; | |
2870 | } | |
2871 | } | |
2872 | ||
b34976b6 | 2873 | return TRUE; |
afd9acee L |
2874 | |
2875 | error_return: | |
bedfd056 L |
2876 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2877 | free (contents); | |
afd9acee L |
2878 | sec->check_relocs_failed = 1; |
2879 | return FALSE; | |
70256ad8 AJ |
2880 | } |
2881 | ||
2882 | /* Return the section that should be marked against GC for a given | |
407443a3 | 2883 | relocation. */ |
70256ad8 AJ |
2884 | |
2885 | static asection * | |
351f65ca L |
2886 | elf_x86_64_gc_mark_hook (asection *sec, |
2887 | struct bfd_link_info *info, | |
2888 | Elf_Internal_Rela *rel, | |
2889 | struct elf_link_hash_entry *h, | |
2890 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
2891 | { |
2892 | if (h != NULL) | |
351f65ca | 2893 | switch (ELF32_R_TYPE (rel->r_info)) |
07adf181 AM |
2894 | { |
2895 | case R_X86_64_GNU_VTINHERIT: | |
2896 | case R_X86_64_GNU_VTENTRY: | |
2897 | return NULL; | |
2898 | } | |
2899 | ||
2900 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
2901 | } |
2902 | ||
aec6b87e L |
2903 | /* Remove undefined weak symbol from the dynamic symbol table if it |
2904 | is resolved to 0. */ | |
2905 | ||
2906 | static bfd_boolean | |
2907 | elf_x86_64_fixup_symbol (struct bfd_link_info *info, | |
2908 | struct elf_link_hash_entry *h) | |
2909 | { | |
2910 | if (h->dynindx != -1 | |
2911 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, | |
e62b9723 | 2912 | elf_x86_64_hash_entry (h)->has_got_reloc, |
aec6b87e L |
2913 | elf_x86_64_hash_entry (h))) |
2914 | { | |
2915 | h->dynindx = -1; | |
2916 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
2917 | h->dynstr_index); | |
2918 | } | |
2919 | return TRUE; | |
2920 | } | |
2921 | ||
70256ad8 AJ |
2922 | /* Adjust a symbol defined by a dynamic object and referenced by a |
2923 | regular object. The current definition is in some section of the | |
2924 | dynamic object, but we're not including those sections. We have to | |
2925 | change the definition to something the rest of the link can | |
407443a3 | 2926 | understand. */ |
70256ad8 | 2927 | |
b34976b6 | 2928 | static bfd_boolean |
351f65ca L |
2929 | elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
2930 | struct elf_link_hash_entry *h) | |
70256ad8 | 2931 | { |
351f65ca | 2932 | struct elf_x86_64_link_hash_table *htab; |
5474d94f | 2933 | asection *s, *srel; |
5ca5bb35 L |
2934 | struct elf_x86_64_link_hash_entry *eh; |
2935 | struct elf_dyn_relocs *p; | |
70256ad8 | 2936 | |
cbe950e9 L |
2937 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2938 | if (h->type == STT_GNU_IFUNC) | |
2939 | { | |
73bcf233 L |
2940 | /* All local STT_GNU_IFUNC references must be treate as local |
2941 | calls via local PLT. */ | |
5ca5bb35 L |
2942 | if (h->ref_regular |
2943 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2944 | { | |
73bcf233 | 2945 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2946 | struct elf_dyn_relocs **pp; |
2947 | ||
2948 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2949 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2950 | { | |
2951 | pc_count += p->pc_count; | |
2952 | p->count -= p->pc_count; | |
2953 | p->pc_count = 0; | |
73bcf233 | 2954 | count += p->count; |
5ca5bb35 L |
2955 | if (p->count == 0) |
2956 | *pp = p->next; | |
2957 | else | |
2958 | pp = &p->next; | |
2959 | } | |
2960 | ||
73bcf233 | 2961 | if (pc_count || count) |
5ca5bb35 | 2962 | { |
5ca5bb35 | 2963 | h->non_got_ref = 1; |
233cc9c1 L |
2964 | if (pc_count) |
2965 | { | |
2966 | /* Increment PLT reference count only for PC-relative | |
2967 | references. */ | |
2968 | h->needs_plt = 1; | |
2969 | if (h->plt.refcount <= 0) | |
2970 | h->plt.refcount = 1; | |
2971 | else | |
2972 | h->plt.refcount += 1; | |
2973 | } | |
5ca5bb35 L |
2974 | } |
2975 | } | |
2976 | ||
cbe950e9 L |
2977 | if (h->plt.refcount <= 0) |
2978 | { | |
2979 | h->plt.offset = (bfd_vma) -1; | |
2980 | h->needs_plt = 0; | |
2981 | } | |
2982 | return TRUE; | |
2983 | } | |
2984 | ||
70256ad8 AJ |
2985 | /* If this is a function, put it in the procedure linkage table. We |
2986 | will fill in the contents of the procedure linkage table later, | |
2987 | when we know the address of the .got section. */ | |
2988 | if (h->type == STT_FUNC | |
f5385ebf | 2989 | || h->needs_plt) |
70256ad8 | 2990 | { |
c434dee6 | 2991 | if (h->plt.refcount <= 0 |
27482721 AJ |
2992 | || SYMBOL_CALLS_LOCAL (info, h) |
2993 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2994 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 2995 | { |
70256ad8 AJ |
2996 | /* This case can occur if we saw a PLT32 reloc in an input |
2997 | file, but the symbol was never referred to by a dynamic | |
2998 | object, or if all references were garbage collected. In | |
2999 | such a case, we don't actually need to build a procedure | |
3000 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 3001 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 3002 | h->needs_plt = 0; |
70256ad8 AJ |
3003 | } |
3004 | ||
b34976b6 | 3005 | return TRUE; |
70256ad8 | 3006 | } |
bbd7ec4a | 3007 | else |
c434dee6 AJ |
3008 | /* It's possible that we incorrectly decided a .plt reloc was |
3009 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
3010 | check_relocs. We can't decide accurately between function and | |
3011 | non-function syms in check-relocs; Objects loaded later in | |
3012 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 3013 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
3014 | |
3015 | /* If this is a weak symbol, and there is a real definition, the | |
3016 | processor independent code will have arranged for us to see the | |
407443a3 | 3017 | real definition first, and we can just use the same value. */ |
f6e332e6 | 3018 | if (h->u.weakdef != NULL) |
70256ad8 | 3019 | { |
f6e332e6 AM |
3020 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
3021 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
3022 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
3023 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 3024 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
bc696fd5 L |
3025 | { |
3026 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
3027 | h->non_got_ref = h->u.weakdef->non_got_ref; | |
3028 | eh->needs_copy = h->u.weakdef->needs_copy; | |
3029 | } | |
b34976b6 | 3030 | return TRUE; |
70256ad8 AJ |
3031 | } |
3032 | ||
3033 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 3034 | is not a function. */ |
70256ad8 AJ |
3035 | |
3036 | /* If we are creating a shared library, we must presume that the | |
3037 | only references to the symbol are via the global offset table. | |
3038 | For such cases we need not do anything here; the relocations will | |
407443a3 | 3039 | be handled correctly by relocate_section. */ |
0e1862bb | 3040 | if (!bfd_link_executable (info)) |
b34976b6 | 3041 | return TRUE; |
70256ad8 AJ |
3042 | |
3043 | /* If there are no references to this symbol that do not use the | |
3044 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 3045 | if (!h->non_got_ref) |
b34976b6 | 3046 | return TRUE; |
70256ad8 | 3047 | |
c434dee6 AJ |
3048 | /* If -z nocopyreloc was given, we won't generate them either. */ |
3049 | if (info->nocopyreloc) | |
3050 | { | |
f5385ebf | 3051 | h->non_got_ref = 0; |
b34976b6 | 3052 | return TRUE; |
c434dee6 AJ |
3053 | } |
3054 | ||
31c0ebfe | 3055 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 3056 | { |
351f65ca | 3057 | eh = (struct elf_x86_64_link_hash_entry *) h; |
d40d037c AJ |
3058 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
3059 | { | |
3060 | s = p->sec->output_section; | |
3061 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
3062 | break; | |
3063 | } | |
3064 | ||
3065 | /* If we didn't find any dynamic relocs in read-only sections, then | |
3066 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
3067 | if (p == NULL) | |
3068 | { | |
f5385ebf | 3069 | h->non_got_ref = 0; |
d40d037c AJ |
3070 | return TRUE; |
3071 | } | |
c434dee6 AJ |
3072 | } |
3073 | ||
70256ad8 | 3074 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 3075 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
3076 | an entry for this symbol in the .dynsym section. The dynamic |
3077 | object will contain position independent code, so all references | |
3078 | from the dynamic object to this symbol will go through the global | |
3079 | offset table. The dynamic linker will use the .dynsym entry to | |
3080 | determine the address it must put in the global offset table, so | |
3081 | both the dynamic object and the regular object will refer to the | |
3082 | same memory location for the variable. */ | |
3083 | ||
351f65ca | 3084 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3085 | if (htab == NULL) |
3086 | return FALSE; | |
70256ad8 AJ |
3087 | |
3088 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
3089 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 3090 | runtime process image. */ |
5474d94f AM |
3091 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
3092 | { | |
3093 | s = htab->elf.sdynrelro; | |
3094 | srel = htab->elf.sreldynrelro; | |
3095 | } | |
3096 | else | |
3097 | { | |
3098 | s = htab->elf.sdynbss; | |
3099 | srel = htab->elf.srelbss; | |
3100 | } | |
1d7e9d18 | 3101 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
70256ad8 | 3102 | { |
351f65ca L |
3103 | const struct elf_backend_data *bed; |
3104 | bed = get_elf_backend_data (info->output_bfd); | |
5474d94f | 3105 | srel->size += bed->s->sizeof_rela; |
f5385ebf | 3106 | h->needs_copy = 1; |
70256ad8 AJ |
3107 | } |
3108 | ||
6cabe1ea | 3109 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
70256ad8 AJ |
3110 | } |
3111 | ||
c434dee6 AJ |
3112 | /* Allocate space in .plt, .got and associated reloc sections for |
3113 | dynamic relocs. */ | |
3114 | ||
b34976b6 | 3115 | static bfd_boolean |
351f65ca | 3116 | elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
3117 | { |
3118 | struct bfd_link_info *info; | |
351f65ca L |
3119 | struct elf_x86_64_link_hash_table *htab; |
3120 | struct elf_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 3121 | struct elf_dyn_relocs *p; |
351f65ca | 3122 | const struct elf_backend_data *bed; |
eed180f8 | 3123 | unsigned int plt_entry_size; |
aec6b87e | 3124 | bfd_boolean resolved_to_zero; |
c434dee6 | 3125 | |
e92d460e | 3126 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 3127 | return TRUE; |
c434dee6 | 3128 | |
351f65ca | 3129 | eh = (struct elf_x86_64_link_hash_entry *) h; |
e92d460e | 3130 | |
c434dee6 | 3131 | info = (struct bfd_link_info *) inf; |
351f65ca | 3132 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3133 | if (htab == NULL) |
3134 | return FALSE; | |
351f65ca | 3135 | bed = get_elf_backend_data (info->output_bfd); |
eed180f8 | 3136 | plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
c434dee6 | 3137 | |
e62b9723 L |
3138 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
3139 | eh->has_got_reloc, | |
3140 | eh); | |
aec6b87e | 3141 | |
dd7e64d4 L |
3142 | /* We can't use the GOT PLT if pointer equality is needed since |
3143 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
3144 | linker won't update the GOT slot. We will get into an infinite | |
3145 | loop at run-time. */ | |
3146 | if (htab->plt_got != NULL | |
3147 | && h->type != STT_GNU_IFUNC | |
3148 | && !h->pointer_equality_needed | |
3149 | && h->plt.refcount > 0 | |
3150 | && h->got.refcount > 0) | |
3151 | { | |
3152 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
3153 | reloctions. */ | |
3154 | h->plt.offset = (bfd_vma) -1; | |
3155 | ||
3156 | /* Use the GOT PLT. */ | |
3157 | eh->plt_got.refcount = 1; | |
3158 | } | |
3159 | ||
04ebc307 L |
3160 | /* Clear the reference count of function pointer relocations if |
3161 | symbol isn't a normal function. */ | |
3162 | if (h->type != STT_FUNC) | |
3163 | eh->func_pointer_refcount = 0; | |
3164 | ||
cbe950e9 L |
3165 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
3166 | here if it is defined and referenced in a non-shared object. */ | |
3167 | if (h->type == STT_GNU_IFUNC | |
3168 | && h->def_regular) | |
0ff2b86e L |
3169 | { |
3170 | if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, | |
3171 | &eh->dyn_relocs, | |
2df3368d | 3172 | &htab->readonly_dynrelocs_against_ifunc, |
0ff2b86e L |
3173 | plt_entry_size, |
3174 | plt_entry_size, | |
233cc9c1 | 3175 | GOT_ENTRY_SIZE, TRUE)) |
0ff2b86e L |
3176 | { |
3177 | asection *s = htab->plt_bnd; | |
3178 | if (h->plt.offset != (bfd_vma) -1 && s != NULL) | |
3179 | { | |
3180 | /* Use the .plt.bnd section if it is created. */ | |
3181 | eh->plt_bnd.offset = s->size; | |
3182 | ||
3183 | /* Make room for this entry in the .plt.bnd section. */ | |
3184 | s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
3185 | } | |
3186 | ||
3187 | return TRUE; | |
3188 | } | |
3189 | else | |
3190 | return FALSE; | |
3191 | } | |
04ebc307 L |
3192 | /* Don't create the PLT entry if there are only function pointer |
3193 | relocations which can be resolved at run-time. */ | |
cbe950e9 | 3194 | else if (htab->elf.dynamic_sections_created |
04ebc307 L |
3195 | && (h->plt.refcount > eh->func_pointer_refcount |
3196 | || eh->plt_got.refcount > 0)) | |
c434dee6 | 3197 | { |
25070364 L |
3198 | bfd_boolean use_plt_got; |
3199 | ||
04ebc307 L |
3200 | /* Clear the reference count of function pointer relocations |
3201 | if PLT is used. */ | |
3202 | eh->func_pointer_refcount = 0; | |
3203 | ||
8ded2ddc | 3204 | if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
25070364 L |
3205 | { |
3206 | /* Don't use the regular PLT for DF_BIND_NOW. */ | |
3207 | h->plt.offset = (bfd_vma) -1; | |
3208 | ||
3209 | /* Use the GOT PLT. */ | |
3210 | h->got.refcount = 1; | |
3211 | eh->plt_got.refcount = 1; | |
3212 | } | |
3213 | ||
3214 | use_plt_got = eh->plt_got.refcount > 0; | |
dd7e64d4 | 3215 | |
c434dee6 AJ |
3216 | /* Make sure this symbol is output as a dynamic symbol. |
3217 | Undefined weak syms won't yet be marked as dynamic. */ | |
3218 | if (h->dynindx == -1 | |
aec6b87e L |
3219 | && !h->forced_local |
3220 | && !resolved_to_zero) | |
c434dee6 | 3221 | { |
c152c796 | 3222 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 3223 | return FALSE; |
c434dee6 AJ |
3224 | } |
3225 | ||
0e1862bb | 3226 | if (bfd_link_pic (info) |
27482721 | 3227 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
c434dee6 | 3228 | { |
6de2ae4a | 3229 | asection *s = htab->elf.splt; |
0ff2b86e | 3230 | asection *bnd_s = htab->plt_bnd; |
dd7e64d4 | 3231 | asection *got_s = htab->plt_got; |
c434dee6 | 3232 | |
7c1e8d3e L |
3233 | /* If this is the first .plt entry, make room for the special |
3234 | first entry. The .plt section is used by prelink to undo | |
3235 | prelinking for dynamic relocations. */ | |
3236 | if (s->size == 0) | |
3237 | s->size = plt_entry_size; | |
3238 | ||
dd7e64d4 L |
3239 | if (use_plt_got) |
3240 | eh->plt_got.offset = got_s->size; | |
3241 | else | |
3242 | { | |
3243 | h->plt.offset = s->size; | |
3244 | if (bnd_s) | |
3245 | eh->plt_bnd.offset = bnd_s->size; | |
3246 | } | |
c434dee6 AJ |
3247 | |
3248 | /* If this symbol is not defined in a regular file, and we are | |
3249 | not generating a shared library, then set the symbol to this | |
3250 | location in the .plt. This is required to make function | |
3251 | pointers compare as equal between the normal executable and | |
3252 | the shared library. */ | |
0e1862bb | 3253 | if (! bfd_link_pic (info) |
f5385ebf | 3254 | && !h->def_regular) |
c434dee6 | 3255 | { |
dd7e64d4 | 3256 | if (use_plt_got) |
0ff2b86e | 3257 | { |
dd7e64d4 L |
3258 | /* We need to make a call to the entry of the GOT PLT |
3259 | instead of regular PLT entry. */ | |
3260 | h->root.u.def.section = got_s; | |
3261 | h->root.u.def.value = eh->plt_got.offset; | |
0ff2b86e L |
3262 | } |
3263 | else | |
3264 | { | |
dd7e64d4 L |
3265 | if (bnd_s) |
3266 | { | |
3267 | /* We need to make a call to the entry of the second | |
3268 | PLT instead of regular PLT entry. */ | |
3269 | h->root.u.def.section = bnd_s; | |
3270 | h->root.u.def.value = eh->plt_bnd.offset; | |
3271 | } | |
3272 | else | |
3273 | { | |
3274 | h->root.u.def.section = s; | |
3275 | h->root.u.def.value = h->plt.offset; | |
3276 | } | |
0ff2b86e | 3277 | } |
c434dee6 AJ |
3278 | } |
3279 | ||
3280 | /* Make room for this entry. */ | |
dd7e64d4 L |
3281 | if (use_plt_got) |
3282 | got_s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
3283 | else | |
3284 | { | |
3285 | s->size += plt_entry_size; | |
3286 | if (bnd_s) | |
3287 | bnd_s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
c434dee6 | 3288 | |
dd7e64d4 L |
3289 | /* We also need to make an entry in the .got.plt section, |
3290 | which will be placed in the .got section by the linker | |
3291 | script. */ | |
3292 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; | |
c434dee6 | 3293 | |
aec6b87e L |
3294 | /* There should be no PLT relocation against resolved |
3295 | undefined weak symbol in executable. */ | |
3296 | if (!resolved_to_zero) | |
3297 | { | |
3298 | /* We also need to make an entry in the .rela.plt | |
3299 | section. */ | |
3300 | htab->elf.srelplt->size += bed->s->sizeof_rela; | |
3301 | htab->elf.srelplt->reloc_count++; | |
3302 | } | |
dd7e64d4 | 3303 | } |
c434dee6 AJ |
3304 | } |
3305 | else | |
3306 | { | |
13f42277 | 3307 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 3308 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 3309 | h->needs_plt = 0; |
c434dee6 AJ |
3310 | } |
3311 | } | |
3312 | else | |
3313 | { | |
13f42277 | 3314 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 3315 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 3316 | h->needs_plt = 0; |
c434dee6 AJ |
3317 | } |
3318 | ||
67a4f2b7 AO |
3319 | eh->tlsdesc_got = (bfd_vma) -1; |
3320 | ||
bffbf940 JJ |
3321 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
3322 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
3323 | if (h->got.refcount > 0 | |
0e1862bb | 3324 | && bfd_link_executable (info) |
bffbf940 | 3325 | && h->dynindx == -1 |
351f65ca | 3326 | && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) |
d8045f23 NC |
3327 | { |
3328 | h->got.offset = (bfd_vma) -1; | |
3329 | } | |
bffbf940 | 3330 | else if (h->got.refcount > 0) |
c434dee6 AJ |
3331 | { |
3332 | asection *s; | |
b34976b6 | 3333 | bfd_boolean dyn; |
351f65ca | 3334 | int tls_type = elf_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
3335 | |
3336 | /* Make sure this symbol is output as a dynamic symbol. | |
3337 | Undefined weak syms won't yet be marked as dynamic. */ | |
3338 | if (h->dynindx == -1 | |
aec6b87e L |
3339 | && !h->forced_local |
3340 | && !resolved_to_zero) | |
c434dee6 | 3341 | { |
c152c796 | 3342 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 3343 | return FALSE; |
c434dee6 AJ |
3344 | } |
3345 | ||
67a4f2b7 AO |
3346 | if (GOT_TLS_GDESC_P (tls_type)) |
3347 | { | |
6de2ae4a | 3348 | eh->tlsdesc_got = htab->elf.sgotplt->size |
351f65ca | 3349 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 3350 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
3351 | h->got.offset = (bfd_vma) -2; |
3352 | } | |
3353 | if (! GOT_TLS_GDESC_P (tls_type) | |
3354 | || GOT_TLS_GD_P (tls_type)) | |
3355 | { | |
6de2ae4a | 3356 | s = htab->elf.sgot; |
67a4f2b7 AO |
3357 | h->got.offset = s->size; |
3358 | s->size += GOT_ENTRY_SIZE; | |
3359 | if (GOT_TLS_GD_P (tls_type)) | |
3360 | s->size += GOT_ENTRY_SIZE; | |
3361 | } | |
c434dee6 | 3362 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 | 3363 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
aec6b87e L |
3364 | and two if global. R_X86_64_GOTTPOFF needs one dynamic |
3365 | relocation. No dynamic relocation against resolved undefined | |
3366 | weak symbol in executable. */ | |
67a4f2b7 | 3367 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 3368 | || tls_type == GOT_TLS_IE) |
351f65ca | 3369 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 | 3370 | else if (GOT_TLS_GD_P (tls_type)) |
351f65ca | 3371 | htab->elf.srelgot->size += 2 * bed->s->sizeof_rela; |
67a4f2b7 | 3372 | else if (! GOT_TLS_GDESC_P (tls_type) |
aec6b87e L |
3373 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
3374 | && !resolved_to_zero) | |
67a4f2b7 | 3375 | || h->root.type != bfd_link_hash_undefweak) |
0e1862bb | 3376 | && (bfd_link_pic (info) |
27482721 | 3377 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
351f65ca | 3378 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
3379 | if (GOT_TLS_GDESC_P (tls_type)) |
3380 | { | |
351f65ca | 3381 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
3382 | htab->tlsdesc_plt = (bfd_vma) -1; |
3383 | } | |
c434dee6 AJ |
3384 | } |
3385 | else | |
3386 | h->got.offset = (bfd_vma) -1; | |
3387 | ||
c434dee6 | 3388 | if (eh->dyn_relocs == NULL) |
b34976b6 | 3389 | return TRUE; |
c434dee6 AJ |
3390 | |
3391 | /* In the shared -Bsymbolic case, discard space allocated for | |
3392 | dynamic pc-relative relocs against symbols which turn out to be | |
3393 | defined in regular objects. For the normal shared case, discard | |
3394 | space for pc-relative relocs that have become local due to symbol | |
3395 | visibility changes. */ | |
3396 | ||
0e1862bb | 3397 | if (bfd_link_pic (info)) |
c434dee6 | 3398 | { |
27482721 AJ |
3399 | /* Relocs that use pc_count are those that appear on a call |
3400 | insn, or certain REL relocs that can generated via assembly. | |
3401 | We want calls to protected symbols to resolve directly to the | |
3402 | function rather than going via the plt. If people want | |
3403 | function pointer comparisons to work as expected then they | |
3404 | should avoid writing weird assembly. */ | |
3405 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 3406 | { |
e03a8ed8 | 3407 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
3408 | |
3409 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
3410 | { | |
c3ce498c L |
3411 | p->count -= p->pc_count; |
3412 | p->pc_count = 0; | |
c434dee6 AJ |
3413 | if (p->count == 0) |
3414 | *pp = p->next; | |
3415 | else | |
3416 | pp = &p->next; | |
3417 | } | |
3418 | } | |
4e795f50 AM |
3419 | |
3420 | /* Also discard relocs on undefined weak syms with non-default | |
aec6b87e | 3421 | visibility or in PIE. */ |
31c0ebfe | 3422 | if (eh->dyn_relocs != NULL) |
22d606e9 | 3423 | { |
31c0ebfe L |
3424 | if (h->root.type == bfd_link_hash_undefweak) |
3425 | { | |
aec6b87e L |
3426 | /* Undefined weak symbol is never bound locally in shared |
3427 | library. */ | |
3428 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
3429 | || resolved_to_zero) | |
31c0ebfe | 3430 | eh->dyn_relocs = NULL; |
31c0ebfe L |
3431 | else if (h->dynindx == -1 |
3432 | && ! h->forced_local | |
3433 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
3434 | return FALSE; | |
3435 | } | |
9d1d54d5 L |
3436 | /* For PIE, discard space for pc-relative relocs against |
3437 | symbols which turn out to need copy relocs. */ | |
0e1862bb | 3438 | else if (bfd_link_executable (info) |
bc696fd5 | 3439 | && (h->needs_copy || eh->needs_copy) |
31c0ebfe L |
3440 | && h->def_dynamic |
3441 | && !h->def_regular) | |
9d1d54d5 L |
3442 | { |
3443 | struct elf_dyn_relocs **pp; | |
3444 | ||
3445 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
3446 | { | |
3447 | if (p->pc_count != 0) | |
3448 | *pp = p->next; | |
3449 | else | |
3450 | pp = &p->next; | |
3451 | } | |
3452 | } | |
22d606e9 | 3453 | } |
d8045f23 | 3454 | } |
d40d037c | 3455 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
3456 | { |
3457 | /* For the non-shared case, discard space for relocs against | |
3458 | symbols which turn out to need copy relocs or are not | |
04ebc307 L |
3459 | dynamic. Keep dynamic relocations for run-time function |
3460 | pointer initialization. */ | |
c434dee6 | 3461 | |
aec6b87e L |
3462 | if ((!h->non_got_ref |
3463 | || eh->func_pointer_refcount > 0 | |
3464 | || (h->root.type == bfd_link_hash_undefweak | |
3465 | && !resolved_to_zero)) | |
f5385ebf AM |
3466 | && ((h->def_dynamic |
3467 | && !h->def_regular) | |
c434dee6 AJ |
3468 | || (htab->elf.dynamic_sections_created |
3469 | && (h->root.type == bfd_link_hash_undefweak | |
3470 | || h->root.type == bfd_link_hash_undefined)))) | |
3471 | { | |
3472 | /* Make sure this symbol is output as a dynamic symbol. | |
3473 | Undefined weak syms won't yet be marked as dynamic. */ | |
3474 | if (h->dynindx == -1 | |
d8045f23 | 3475 | && ! h->forced_local |
aec6b87e | 3476 | && ! resolved_to_zero |
d8045f23 NC |
3477 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
3478 | return FALSE; | |
c434dee6 AJ |
3479 | |
3480 | /* If that succeeded, we know we'll be keeping all the | |
3481 | relocs. */ | |
3482 | if (h->dynindx != -1) | |
3483 | goto keep; | |
3484 | } | |
3485 | ||
3486 | eh->dyn_relocs = NULL; | |
04ebc307 | 3487 | eh->func_pointer_refcount = 0; |
c434dee6 AJ |
3488 | |
3489 | keep: ; | |
3490 | } | |
3491 | ||
3492 | /* Finally, allocate space. */ | |
3493 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
3494 | { | |
e7c33416 NC |
3495 | asection * sreloc; |
3496 | ||
cbe950e9 | 3497 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
3498 | |
3499 | BFD_ASSERT (sreloc != NULL); | |
3500 | ||
351f65ca | 3501 | sreloc->size += p->count * bed->s->sizeof_rela; |
c434dee6 AJ |
3502 | } |
3503 | ||
b34976b6 | 3504 | return TRUE; |
c434dee6 AJ |
3505 | } |
3506 | ||
c25bc9fc L |
3507 | /* Allocate space in .plt, .got and associated reloc sections for |
3508 | local dynamic relocs. */ | |
3509 | ||
3510 | static bfd_boolean | |
351f65ca | 3511 | elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf) |
c25bc9fc L |
3512 | { |
3513 | struct elf_link_hash_entry *h | |
3514 | = (struct elf_link_hash_entry *) *slot; | |
3515 | ||
3516 | if (h->type != STT_GNU_IFUNC | |
3517 | || !h->def_regular | |
3518 | || !h->ref_regular | |
3519 | || !h->forced_local | |
3520 | || h->root.type != bfd_link_hash_defined) | |
3521 | abort (); | |
3522 | ||
351f65ca | 3523 | return elf_x86_64_allocate_dynrelocs (h, inf); |
c25bc9fc L |
3524 | } |
3525 | ||
c434dee6 AJ |
3526 | /* Find any dynamic relocs that apply to read-only sections. */ |
3527 | ||
b34976b6 | 3528 | static bfd_boolean |
351f65ca L |
3529 | elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h, |
3530 | void * inf) | |
c434dee6 | 3531 | { |
351f65ca | 3532 | struct elf_x86_64_link_hash_entry *eh; |
e03a8ed8 | 3533 | struct elf_dyn_relocs *p; |
c434dee6 | 3534 | |
aa715242 L |
3535 | /* Skip local IFUNC symbols. */ |
3536 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
3537 | return TRUE; | |
3538 | ||
351f65ca | 3539 | eh = (struct elf_x86_64_link_hash_entry *) h; |
c434dee6 AJ |
3540 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
3541 | { | |
3542 | asection *s = p->sec->output_section; | |
3543 | ||
3544 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
3545 | { | |
3546 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
3547 | ||
3548 | info->flags |= DF_TEXTREL; | |
3549 | ||
0e1862bb | 3550 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd | 3551 | || info->error_textrel) |
695344c0 | 3552 | /* xgettext:c-format */ |
1952c5cd | 3553 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"), |
b70321a2 L |
3554 | p->sec->owner, h->root.root.string, |
3555 | p->sec); | |
3556 | ||
c434dee6 | 3557 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 3558 | return FALSE; |
c434dee6 AJ |
3559 | } |
3560 | } | |
b34976b6 | 3561 | return TRUE; |
c434dee6 AJ |
3562 | } |
3563 | ||
c175a657 | 3564 | /* Convert load via the GOT slot to load immediate. */ |
daa67607 L |
3565 | |
3566 | static bfd_boolean | |
56ceb5b5 L |
3567 | elf_x86_64_convert_load (bfd *abfd, asection *sec, |
3568 | struct bfd_link_info *link_info) | |
daa67607 L |
3569 | { |
3570 | Elf_Internal_Shdr *symtab_hdr; | |
3571 | Elf_Internal_Rela *internal_relocs; | |
3572 | Elf_Internal_Rela *irel, *irelend; | |
3573 | bfd_byte *contents; | |
3574 | struct elf_x86_64_link_hash_table *htab; | |
c175a657 | 3575 | bfd_boolean changed; |
daa67607 L |
3576 | bfd_signed_vma *local_got_refcounts; |
3577 | ||
3578 | /* Don't even try to convert non-ELF outputs. */ | |
3579 | if (!is_elf_hash_table (link_info->hash)) | |
3580 | return FALSE; | |
3581 | ||
c1d11331 | 3582 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 3583 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
56ceb5b5 | 3584 | || sec->need_convert_load == 0 |
c8831961 | 3585 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
3586 | return TRUE; |
3587 | ||
3588 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3589 | ||
3590 | /* Load the relocations for this section. */ | |
3591 | internal_relocs = (_bfd_elf_link_read_relocs | |
3592 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
3593 | link_info->keep_memory)); | |
3594 | if (internal_relocs == NULL) | |
3595 | return FALSE; | |
3596 | ||
c175a657 | 3597 | changed = FALSE; |
daa67607 | 3598 | htab = elf_x86_64_hash_table (link_info); |
daa67607 L |
3599 | local_got_refcounts = elf_local_got_refcounts (abfd); |
3600 | ||
3601 | /* Get the section contents. */ | |
3602 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
3603 | contents = elf_section_data (sec)->this_hdr.contents; | |
3604 | else | |
3605 | { | |
3606 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
3607 | goto error_return; | |
3608 | } | |
3609 | ||
3610 | irelend = internal_relocs + sec->reloc_count; | |
3611 | for (irel = internal_relocs; irel < irelend; irel++) | |
3612 | { | |
3613 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
c175a657 | 3614 | unsigned int r_symndx; |
daa67607 | 3615 | struct elf_link_hash_entry *h; |
c175a657 | 3616 | bfd_boolean converted; |
59cab532 | 3617 | |
c175a657 L |
3618 | if (r_type != R_X86_64_GOTPCRELX |
3619 | && r_type != R_X86_64_REX_GOTPCRELX | |
3620 | && r_type != R_X86_64_GOTPCREL) | |
dfc87947 L |
3621 | continue; |
3622 | ||
c175a657 | 3623 | r_symndx = htab->r_sym (irel->r_info); |
daa67607 | 3624 | if (r_symndx < symtab_hdr->sh_info) |
c175a657 L |
3625 | h = elf_x86_64_get_local_sym_hash (htab, sec->owner, |
3626 | (const Elf_Internal_Rela *) irel, | |
3627 | FALSE); | |
59cab532 L |
3628 | else |
3629 | { | |
c175a657 | 3630 | h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info]; |
59cab532 L |
3631 | while (h->root.type == bfd_link_hash_indirect |
3632 | || h->root.type == bfd_link_hash_warning) | |
3633 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
59cab532 L |
3634 | } |
3635 | ||
c175a657 L |
3636 | /* STT_GNU_IFUNC must keep GOTPCREL relocations. */ |
3637 | if (h != NULL && h->type == STT_GNU_IFUNC) | |
3638 | continue; | |
daa67607 | 3639 | |
c175a657 L |
3640 | converted = FALSE; |
3641 | if (!elf_x86_64_convert_load_reloc (abfd, sec, contents, irel, h, | |
3642 | &converted, link_info)) | |
3643 | goto error_return; | |
56ceb5b5 | 3644 | |
c175a657 | 3645 | if (converted) |
56ceb5b5 | 3646 | { |
c175a657 L |
3647 | changed = converted; |
3648 | if (h) | |
56ceb5b5 | 3649 | { |
c175a657 L |
3650 | if (h->got.refcount > 0) |
3651 | h->got.refcount -= 1; | |
56ceb5b5 L |
3652 | } |
3653 | else | |
3654 | { | |
c175a657 L |
3655 | if (local_got_refcounts != NULL |
3656 | && local_got_refcounts[r_symndx] > 0) | |
3657 | local_got_refcounts[r_symndx] -= 1; | |
56ceb5b5 | 3658 | } |
daa67607 L |
3659 | } |
3660 | } | |
3661 | ||
3662 | if (contents != NULL | |
3663 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3664 | { | |
c175a657 | 3665 | if (!changed && !link_info->keep_memory) |
daa67607 L |
3666 | free (contents); |
3667 | else | |
3668 | { | |
3669 | /* Cache the section contents for elf_link_input_bfd. */ | |
3670 | elf_section_data (sec)->this_hdr.contents = contents; | |
3671 | } | |
3672 | } | |
3673 | ||
3674 | if (elf_section_data (sec)->relocs != internal_relocs) | |
3675 | { | |
c175a657 | 3676 | if (!changed) |
daa67607 L |
3677 | free (internal_relocs); |
3678 | else | |
3679 | elf_section_data (sec)->relocs = internal_relocs; | |
3680 | } | |
3681 | ||
3682 | return TRUE; | |
3683 | ||
3684 | error_return: | |
3685 | if (contents != NULL | |
3686 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3687 | free (contents); | |
3688 | if (internal_relocs != NULL | |
3689 | && elf_section_data (sec)->relocs != internal_relocs) | |
3690 | free (internal_relocs); | |
3691 | return FALSE; | |
3692 | } | |
3693 | ||
70256ad8 AJ |
3694 | /* Set the sizes of the dynamic sections. */ |
3695 | ||
b34976b6 | 3696 | static bfd_boolean |
351f65ca L |
3697 | elf_x86_64_size_dynamic_sections (bfd *output_bfd, |
3698 | struct bfd_link_info *info) | |
70256ad8 | 3699 | { |
351f65ca | 3700 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
3701 | bfd *dynobj; |
3702 | asection *s; | |
b34976b6 | 3703 | bfd_boolean relocs; |
c434dee6 | 3704 | bfd *ibfd; |
351f65ca | 3705 | const struct elf_backend_data *bed; |
8361ed4d | 3706 | const struct elf_x86_64_backend_data *arch_data; |
70256ad8 | 3707 | |
351f65ca | 3708 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3709 | if (htab == NULL) |
3710 | return FALSE; | |
351f65ca | 3711 | bed = get_elf_backend_data (output_bfd); |
4dfe6ac6 | 3712 | |
c434dee6 AJ |
3713 | dynobj = htab->elf.dynobj; |
3714 | if (dynobj == NULL) | |
3715 | abort (); | |
70256ad8 | 3716 | |
c434dee6 AJ |
3717 | /* Set up .got offsets for local syms, and space for local dynamic |
3718 | relocs. */ | |
c72f2fb2 | 3719 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
70256ad8 | 3720 | { |
c434dee6 AJ |
3721 | bfd_signed_vma *local_got; |
3722 | bfd_signed_vma *end_local_got; | |
bffbf940 | 3723 | char *local_tls_type; |
67a4f2b7 | 3724 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
3725 | bfd_size_type locsymcount; |
3726 | Elf_Internal_Shdr *symtab_hdr; | |
3727 | asection *srel; | |
70256ad8 | 3728 | |
0ffa91dd | 3729 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
3730 | continue; |
3731 | ||
c434dee6 | 3732 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 3733 | { |
e03a8ed8 | 3734 | struct elf_dyn_relocs *p; |
c434dee6 | 3735 | |
56ceb5b5 | 3736 | if (!elf_x86_64_convert_load (ibfd, s, info)) |
daa67607 L |
3737 | return FALSE; |
3738 | ||
e03a8ed8 | 3739 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 3740 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
3741 | p != NULL; |
3742 | p = p->next) | |
70256ad8 | 3743 | { |
c434dee6 AJ |
3744 | if (!bfd_is_abs_section (p->sec) |
3745 | && bfd_is_abs_section (p->sec->output_section)) | |
3746 | { | |
3747 | /* Input section has been discarded, either because | |
3748 | it is a copy of a linkonce section or due to | |
3749 | linker script /DISCARD/, so we'll be discarding | |
3750 | the relocs too. */ | |
3751 | } | |
3752 | else if (p->count != 0) | |
3753 | { | |
3754 | srel = elf_section_data (p->sec)->sreloc; | |
351f65ca | 3755 | srel->size += p->count * bed->s->sizeof_rela; |
4b819e1f L |
3756 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
3757 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
3758 | { |
3759 | info->flags |= DF_TEXTREL; | |
0e1862bb | 3760 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd | 3761 | || info->error_textrel) |
695344c0 | 3762 | /* xgettext:c-format */ |
1952c5cd | 3763 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), |
b70321a2 | 3764 | p->sec->owner, p->sec); |
b70321a2 | 3765 | } |
c434dee6 | 3766 | } |
70256ad8 AJ |
3767 | } |
3768 | } | |
c434dee6 AJ |
3769 | |
3770 | local_got = elf_local_got_refcounts (ibfd); | |
3771 | if (!local_got) | |
3772 | continue; | |
3773 | ||
0ffa91dd | 3774 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
3775 | locsymcount = symtab_hdr->sh_info; |
3776 | end_local_got = local_got + locsymcount; | |
351f65ca L |
3777 | local_tls_type = elf_x86_64_local_got_tls_type (ibfd); |
3778 | local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd); | |
6de2ae4a L |
3779 | s = htab->elf.sgot; |
3780 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
3781 | for (; local_got < end_local_got; |
3782 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 3783 | { |
67a4f2b7 | 3784 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 3785 | if (*local_got > 0) |
70256ad8 | 3786 | { |
67a4f2b7 AO |
3787 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
3788 | { | |
6de2ae4a | 3789 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
351f65ca | 3790 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 3791 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
3792 | *local_got = (bfd_vma) -2; |
3793 | } | |
3794 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3795 | || GOT_TLS_GD_P (*local_tls_type)) | |
3796 | { | |
3797 | *local_got = s->size; | |
3798 | s->size += GOT_ENTRY_SIZE; | |
3799 | if (GOT_TLS_GD_P (*local_tls_type)) | |
3800 | s->size += GOT_ENTRY_SIZE; | |
3801 | } | |
0e1862bb | 3802 | if (bfd_link_pic (info) |
67a4f2b7 | 3803 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 3804 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
3805 | { |
3806 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
3807 | { | |
6de2ae4a | 3808 | htab->elf.srelplt->size |
351f65ca | 3809 | += bed->s->sizeof_rela; |
67a4f2b7 AO |
3810 | htab->tlsdesc_plt = (bfd_vma) -1; |
3811 | } | |
3812 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3813 | || GOT_TLS_GD_P (*local_tls_type)) | |
351f65ca | 3814 | srel->size += bed->s->sizeof_rela; |
67a4f2b7 | 3815 | } |
70256ad8 AJ |
3816 | } |
3817 | else | |
c434dee6 AJ |
3818 | *local_got = (bfd_vma) -1; |
3819 | } | |
3820 | } | |
70256ad8 | 3821 | |
bffbf940 JJ |
3822 | if (htab->tls_ld_got.refcount > 0) |
3823 | { | |
3824 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
3825 | relocs. */ | |
6de2ae4a L |
3826 | htab->tls_ld_got.offset = htab->elf.sgot->size; |
3827 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; | |
351f65ca | 3828 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
bffbf940 JJ |
3829 | } |
3830 | else | |
3831 | htab->tls_ld_got.offset = -1; | |
3832 | ||
c434dee6 AJ |
3833 | /* Allocate global sym .plt and .got entries, and space for global |
3834 | sym dynamic relocs. */ | |
351f65ca | 3835 | elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs, |
eb4ff4d6 | 3836 | info); |
c434dee6 | 3837 | |
c25bc9fc L |
3838 | /* Allocate .plt and .got entries, and space for local symbols. */ |
3839 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 3840 | elf_x86_64_allocate_local_dynrelocs, |
c25bc9fc L |
3841 | info); |
3842 | ||
67a4f2b7 AO |
3843 | /* For every jump slot reserved in the sgotplt, reloc_count is |
3844 | incremented. However, when we reserve space for TLS descriptors, | |
3845 | it's not incremented, so in order to compute the space reserved | |
3846 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 L |
3847 | slot size. |
3848 | ||
3849 | PR ld/13302: We start next_irelative_index at the end of .rela.plt | |
3850 | so that R_X86_64_IRELATIVE entries come last. */ | |
6de2ae4a | 3851 | if (htab->elf.srelplt) |
e1f98742 L |
3852 | { |
3853 | htab->sgotplt_jump_table_size | |
3854 | = elf_x86_64_compute_jump_table_size (htab); | |
3855 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
3856 | } | |
3857 | else if (htab->elf.irelplt) | |
3858 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
67a4f2b7 AO |
3859 | |
3860 | if (htab->tlsdesc_plt) | |
3861 | { | |
3862 | /* If we're not using lazy TLS relocations, don't generate the | |
3863 | PLT and GOT entries they require. */ | |
3864 | if ((info->flags & DF_BIND_NOW)) | |
3865 | htab->tlsdesc_plt = 0; | |
3866 | else | |
3867 | { | |
6de2ae4a L |
3868 | htab->tlsdesc_got = htab->elf.sgot->size; |
3869 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
3870 | /* Reserve room for the initial entry. |
3871 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a | 3872 | if (htab->elf.splt->size == 0) |
eed180f8 | 3873 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
6de2ae4a | 3874 | htab->tlsdesc_plt = htab->elf.splt->size; |
eed180f8 | 3875 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
67a4f2b7 AO |
3876 | } |
3877 | } | |
3878 | ||
a7b16ceb L |
3879 | if (htab->elf.sgotplt) |
3880 | { | |
3881 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
eed180f8 | 3882 | entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
3883 | if ((htab->elf.hgot == NULL |
3884 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
3885 | && (htab->elf.sgotplt->size |
3886 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
3887 | && (htab->elf.splt == NULL |
3888 | || htab->elf.splt->size == 0) | |
3889 | && (htab->elf.sgot == NULL | |
3890 | || htab->elf.sgot->size == 0) | |
3891 | && (htab->elf.iplt == NULL | |
3892 | || htab->elf.iplt->size == 0) | |
3893 | && (htab->elf.igotplt == NULL | |
3894 | || htab->elf.igotplt->size == 0)) | |
3895 | htab->elf.sgotplt->size = 0; | |
3896 | } | |
3897 | ||
8361ed4d L |
3898 | arch_data = (htab->plt_bnd != NULL |
3899 | ? &elf_x86_64_bnd_arch_bed | |
3900 | : get_elf_x86_64_arch_data (bed)); | |
3901 | ||
fff53dae | 3902 | if (_bfd_elf_eh_frame_present (info)) |
9a2a56cc | 3903 | { |
fff53dae L |
3904 | if (htab->plt_eh_frame != NULL |
3905 | && htab->elf.splt != NULL | |
3906 | && htab->elf.splt->size != 0 | |
3907 | && !bfd_is_abs_section (htab->elf.splt->output_section)) | |
8361ed4d | 3908 | htab->plt_eh_frame->size = arch_data->eh_frame_plt_size; |
fff53dae L |
3909 | |
3910 | if (htab->plt_got_eh_frame != NULL | |
3911 | && htab->plt_got != NULL | |
3912 | && htab->plt_got->size != 0 | |
3913 | && !bfd_is_abs_section (htab->plt_got->output_section)) | |
8361ed4d L |
3914 | htab->plt_got_eh_frame->size = arch_data->eh_frame_plt_got_size; |
3915 | ||
3916 | /* Unwind info for .plt.bnd and .plt.got sections are | |
3917 | identical. */ | |
3918 | if (htab->plt_bnd_eh_frame != NULL | |
3919 | && htab->plt_bnd != NULL | |
3920 | && htab->plt_bnd->size != 0 | |
3921 | && !bfd_is_abs_section (htab->plt_bnd->output_section)) | |
3922 | htab->plt_bnd_eh_frame->size = arch_data->eh_frame_plt_got_size; | |
9a2a56cc AM |
3923 | } |
3924 | ||
c434dee6 AJ |
3925 | /* We now have determined the sizes of the various dynamic sections. |
3926 | Allocate memory for them. */ | |
b34976b6 | 3927 | relocs = FALSE; |
c434dee6 AJ |
3928 | for (s = dynobj->sections; s != NULL; s = s->next) |
3929 | { | |
3930 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3931 | continue; | |
3932 | ||
6de2ae4a L |
3933 | if (s == htab->elf.splt |
3934 | || s == htab->elf.sgot | |
3935 | || s == htab->elf.sgotplt | |
3936 | || s == htab->elf.iplt | |
3937 | || s == htab->elf.igotplt | |
0ff2b86e | 3938 | || s == htab->plt_bnd |
dd7e64d4 | 3939 | || s == htab->plt_got |
9a2a56cc | 3940 | || s == htab->plt_eh_frame |
fff53dae | 3941 | || s == htab->plt_got_eh_frame |
8361ed4d | 3942 | || s == htab->plt_bnd_eh_frame |
5474d94f AM |
3943 | || s == htab->elf.sdynbss |
3944 | || s == htab->elf.sdynrelro) | |
c434dee6 AJ |
3945 | { |
3946 | /* Strip this section if we don't need it; see the | |
3947 | comment below. */ | |
3948 | } | |
0112cd26 | 3949 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 3950 | { |
6de2ae4a | 3951 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 3952 | relocs = TRUE; |
c434dee6 AJ |
3953 | |
3954 | /* We use the reloc_count field as a counter if we need | |
3955 | to copy relocs into the output file. */ | |
6de2ae4a | 3956 | if (s != htab->elf.srelplt) |
67a4f2b7 | 3957 | s->reloc_count = 0; |
70256ad8 | 3958 | } |
c434dee6 | 3959 | else |
70256ad8 AJ |
3960 | { |
3961 | /* It's not one of our sections, so don't allocate space. */ | |
3962 | continue; | |
3963 | } | |
3964 | ||
eea6121a | 3965 | if (s->size == 0) |
70256ad8 | 3966 | { |
c434dee6 AJ |
3967 | /* If we don't need this section, strip it from the |
3968 | output file. This is mostly to handle .rela.bss and | |
3969 | .rela.plt. We must create both sections in | |
3970 | create_dynamic_sections, because they must be created | |
3971 | before the linker maps input sections to output | |
3972 | sections. The linker does that before | |
3973 | adjust_dynamic_symbol is called, and it is that | |
3974 | function which decides whether anything needs to go | |
3975 | into these sections. */ | |
3976 | ||
8423293d | 3977 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
3978 | continue; |
3979 | } | |
3980 | ||
c456f082 AM |
3981 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3982 | continue; | |
3983 | ||
70256ad8 AJ |
3984 | /* Allocate memory for the section contents. We use bfd_zalloc |
3985 | here in case unused entries are not reclaimed before the | |
3986 | section's contents are written out. This should not happen, | |
3987 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
3988 | of garbage. */ | |
eea6121a | 3989 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 3990 | if (s->contents == NULL) |
b34976b6 | 3991 | return FALSE; |
70256ad8 AJ |
3992 | } |
3993 | ||
e41b3a13 | 3994 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3995 | && htab->plt_eh_frame->contents != NULL) |
3996 | { | |
9a2a56cc AM |
3997 | memcpy (htab->plt_eh_frame->contents, |
3998 | arch_data->eh_frame_plt, htab->plt_eh_frame->size); | |
3999 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
4000 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
4001 | } | |
e41b3a13 | 4002 | |
fff53dae L |
4003 | if (htab->plt_got_eh_frame != NULL |
4004 | && htab->plt_got_eh_frame->contents != NULL) | |
4005 | { | |
fff53dae L |
4006 | memcpy (htab->plt_got_eh_frame->contents, |
4007 | arch_data->eh_frame_plt_got, | |
4008 | htab->plt_got_eh_frame->size); | |
4009 | bfd_put_32 (dynobj, htab->plt_got->size, | |
4010 | (htab->plt_got_eh_frame->contents | |
4011 | + PLT_FDE_LEN_OFFSET)); | |
4012 | } | |
4013 | ||
8361ed4d L |
4014 | if (htab->plt_bnd_eh_frame != NULL |
4015 | && htab->plt_bnd_eh_frame->contents != NULL) | |
4016 | { | |
4017 | memcpy (htab->plt_bnd_eh_frame->contents, | |
4018 | arch_data->eh_frame_plt_got, | |
4019 | htab->plt_bnd_eh_frame->size); | |
4020 | bfd_put_32 (dynobj, htab->plt_bnd->size, | |
4021 | (htab->plt_bnd_eh_frame->contents | |
4022 | + PLT_FDE_LEN_OFFSET)); | |
4023 | } | |
4024 | ||
c434dee6 | 4025 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
4026 | { |
4027 | /* Add some entries to the .dynamic section. We fill in the | |
351f65ca | 4028 | values later, in elf_x86_64_finish_dynamic_sections, but we |
70256ad8 | 4029 | must add the entries now so that we get the correct size for |
407443a3 | 4030 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 4031 | dynamic linker and used by the debugger. */ |
dc810e39 | 4032 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 4033 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 4034 | |
0e1862bb | 4035 | if (bfd_link_executable (info)) |
70256ad8 | 4036 | { |
dc810e39 | 4037 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 4038 | return FALSE; |
70256ad8 AJ |
4039 | } |
4040 | ||
6de2ae4a | 4041 | if (htab->elf.splt->size != 0) |
70256ad8 | 4042 | { |
7c1e8d3e L |
4043 | /* DT_PLTGOT is used by prelink even if there is no PLT |
4044 | relocation. */ | |
4045 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
b34976b6 | 4046 | return FALSE; |
67a4f2b7 | 4047 | |
7c1e8d3e L |
4048 | if (htab->elf.srelplt->size != 0) |
4049 | { | |
4050 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
4051 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
4052 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
4053 | return FALSE; | |
4054 | } | |
4055 | ||
67a4f2b7 AO |
4056 | if (htab->tlsdesc_plt |
4057 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
4058 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
4059 | return FALSE; | |
70256ad8 AJ |
4060 | } |
4061 | ||
4062 | if (relocs) | |
4063 | { | |
dc810e39 AM |
4064 | if (!add_dynamic_entry (DT_RELA, 0) |
4065 | || !add_dynamic_entry (DT_RELASZ, 0) | |
351f65ca | 4066 | || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela)) |
b34976b6 | 4067 | return FALSE; |
70256ad8 | 4068 | |
c434dee6 AJ |
4069 | /* If any dynamic relocs apply to a read-only section, |
4070 | then we need a DT_TEXTREL entry. */ | |
4071 | if ((info->flags & DF_TEXTREL) == 0) | |
eed180f8 | 4072 | elf_link_hash_traverse (&htab->elf, |
351f65ca | 4073 | elf_x86_64_readonly_dynrelocs, |
eb4ff4d6 | 4074 | info); |
c434dee6 AJ |
4075 | |
4076 | if ((info->flags & DF_TEXTREL) != 0) | |
4077 | { | |
2df3368d | 4078 | if (htab->readonly_dynrelocs_against_ifunc) |
8efa2874 L |
4079 | { |
4080 | info->callbacks->einfo | |
4081 | (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n")); | |
4082 | bfd_set_error (bfd_error_bad_value); | |
4083 | return FALSE; | |
4084 | } | |
4085 | ||
c434dee6 | 4086 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 4087 | return FALSE; |
c434dee6 | 4088 | } |
70256ad8 AJ |
4089 | } |
4090 | } | |
dc810e39 | 4091 | #undef add_dynamic_entry |
70256ad8 | 4092 | |
b34976b6 | 4093 | return TRUE; |
70256ad8 AJ |
4094 | } |
4095 | ||
67a4f2b7 | 4096 | static bfd_boolean |
351f65ca L |
4097 | elf_x86_64_always_size_sections (bfd *output_bfd, |
4098 | struct bfd_link_info *info) | |
67a4f2b7 AO |
4099 | { |
4100 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
4101 | ||
4102 | if (tls_sec) | |
4103 | { | |
4104 | struct elf_link_hash_entry *tlsbase; | |
4105 | ||
4106 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
4107 | "_TLS_MODULE_BASE_", | |
4108 | FALSE, FALSE, FALSE); | |
4109 | ||
4110 | if (tlsbase && tlsbase->type == STT_TLS) | |
4111 | { | |
351f65ca | 4112 | struct elf_x86_64_link_hash_table *htab; |
67a4f2b7 AO |
4113 | struct bfd_link_hash_entry *bh = NULL; |
4114 | const struct elf_backend_data *bed | |
4115 | = get_elf_backend_data (output_bfd); | |
4116 | ||
351f65ca | 4117 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4118 | if (htab == NULL) |
4119 | return FALSE; | |
4120 | ||
67a4f2b7 AO |
4121 | if (!(_bfd_generic_link_add_one_symbol |
4122 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
4123 | tls_sec, 0, NULL, FALSE, | |
4124 | bed->collect, &bh))) | |
4125 | return FALSE; | |
9f03412a | 4126 | |
4dfe6ac6 | 4127 | htab->tls_module_base = bh; |
9f03412a | 4128 | |
67a4f2b7 AO |
4129 | tlsbase = (struct elf_link_hash_entry *)bh; |
4130 | tlsbase->def_regular = 1; | |
4131 | tlsbase->other = STV_HIDDEN; | |
576fa883 | 4132 | tlsbase->root.linker_def = 1; |
67a4f2b7 AO |
4133 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
4134 | } | |
4135 | } | |
4136 | ||
4137 | return TRUE; | |
4138 | } | |
4139 | ||
9f03412a AO |
4140 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
4141 | executables. Rather than setting it to the beginning of the TLS | |
4142 | section, we have to set it to the end. This function may be called | |
4143 | multiple times, it is idempotent. */ | |
4144 | ||
4145 | static void | |
351f65ca | 4146 | elf_x86_64_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 4147 | { |
351f65ca | 4148 | struct elf_x86_64_link_hash_table *htab; |
9f03412a AO |
4149 | struct bfd_link_hash_entry *base; |
4150 | ||
0e1862bb | 4151 | if (!bfd_link_executable (info)) |
9f03412a AO |
4152 | return; |
4153 | ||
351f65ca | 4154 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4155 | if (htab == NULL) |
4156 | return; | |
9f03412a | 4157 | |
4dfe6ac6 NC |
4158 | base = htab->tls_module_base; |
4159 | if (base == NULL) | |
9f03412a AO |
4160 | return; |
4161 | ||
4dfe6ac6 | 4162 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
4163 | } |
4164 | ||
bffbf940 JJ |
4165 | /* Return the base VMA address which should be subtracted from real addresses |
4166 | when resolving @dtpoff relocation. | |
4167 | This is PT_TLS segment p_vaddr. */ | |
4168 | ||
4169 | static bfd_vma | |
351f65ca | 4170 | elf_x86_64_dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 4171 | { |
e1918d23 AM |
4172 | /* If tls_sec is NULL, we should have signalled an error already. */ |
4173 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 4174 | return 0; |
e1918d23 | 4175 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
4176 | } |
4177 | ||
4178 | /* Return the relocation value for @tpoff relocation | |
4179 | if STT_TLS virtual address is ADDRESS. */ | |
4180 | ||
4181 | static bfd_vma | |
351f65ca | 4182 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 4183 | { |
e1918d23 | 4184 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
4185 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
4186 | bfd_vma static_tls_size; | |
bffbf940 JJ |
4187 | |
4188 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 4189 | if (htab->tls_sec == NULL) |
bffbf940 | 4190 | return 0; |
7dc98aea RO |
4191 | |
4192 | /* Consider special static TLS alignment requirements. */ | |
4193 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
4194 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
4195 | } |
4196 | ||
90f487df L |
4197 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
4198 | branch? */ | |
4199 | ||
4200 | static bfd_boolean | |
4201 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
4202 | { | |
4203 | /* Opcode Instruction | |
4204 | 0xe8 call | |
4205 | 0xe9 jump | |
4206 | 0x0f 0x8x conditional jump */ | |
4207 | return ((offset > 0 | |
4208 | && (contents [offset - 1] == 0xe8 | |
4209 | || contents [offset - 1] == 0xe9)) | |
4210 | || (offset > 1 | |
4211 | && contents [offset - 2] == 0x0f | |
4212 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
4213 | } | |
4214 | ||
8d88c4ca NC |
4215 | /* Relocate an x86_64 ELF section. */ |
4216 | ||
b34976b6 | 4217 | static bfd_boolean |
351f65ca L |
4218 | elf_x86_64_relocate_section (bfd *output_bfd, |
4219 | struct bfd_link_info *info, | |
4220 | bfd *input_bfd, | |
4221 | asection *input_section, | |
4222 | bfd_byte *contents, | |
4223 | Elf_Internal_Rela *relocs, | |
4224 | Elf_Internal_Sym *local_syms, | |
4225 | asection **local_sections) | |
8d88c4ca | 4226 | { |
351f65ca | 4227 | struct elf_x86_64_link_hash_table *htab; |
8d88c4ca NC |
4228 | Elf_Internal_Shdr *symtab_hdr; |
4229 | struct elf_link_hash_entry **sym_hashes; | |
4230 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 4231 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 4232 | Elf_Internal_Rela *rel; |
60f2e42e | 4233 | Elf_Internal_Rela *wrel; |
8d88c4ca | 4234 | Elf_Internal_Rela *relend; |
eed180f8 | 4235 | const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
8d88c4ca | 4236 | |
0ffa91dd NC |
4237 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
4238 | ||
338c190a L |
4239 | /* Skip if check_relocs failed. */ |
4240 | if (input_section->check_relocs_failed) | |
4241 | return FALSE; | |
4242 | ||
351f65ca | 4243 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4244 | if (htab == NULL) |
4245 | return FALSE; | |
0ffa91dd | 4246 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
4247 | sym_hashes = elf_sym_hashes (input_bfd); |
4248 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
351f65ca | 4249 | local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 4250 | |
351f65ca | 4251 | elf_x86_64_set_tls_module_base (info); |
9f03412a | 4252 | |
60f2e42e | 4253 | rel = wrel = relocs; |
8d88c4ca | 4254 | relend = relocs + input_section->reloc_count; |
60f2e42e | 4255 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 4256 | { |
bffbf940 | 4257 | unsigned int r_type; |
8d88c4ca NC |
4258 | reloc_howto_type *howto; |
4259 | unsigned long r_symndx; | |
4260 | struct elf_link_hash_entry *h; | |
0ff2b86e | 4261 | struct elf_x86_64_link_hash_entry *eh; |
8d88c4ca NC |
4262 | Elf_Internal_Sym *sym; |
4263 | asection *sec; | |
0ff2b86e | 4264 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 4265 | bfd_vma relocation; |
b34976b6 | 4266 | bfd_boolean unresolved_reloc; |
8d88c4ca | 4267 | bfd_reloc_status_type r; |
bffbf940 | 4268 | int tls_type; |
0ff2b86e | 4269 | asection *base_got, *resolved_plt; |
1788fc08 | 4270 | bfd_vma st_size; |
aec6b87e | 4271 | bfd_boolean resolved_to_zero; |
8d88c4ca | 4272 | |
351f65ca | 4273 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
4274 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
4275 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
4276 | { |
4277 | if (wrel != rel) | |
4278 | *wrel = *rel; | |
4279 | continue; | |
4280 | } | |
8d88c4ca | 4281 | |
9911c0fc | 4282 | if (r_type >= (int) R_X86_64_standard) |
8da6118f | 4283 | { |
4eca0228 | 4284 | _bfd_error_handler |
695344c0 | 4285 | /* xgettext:c-format */ |
9911c0fc L |
4286 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), |
4287 | input_bfd, input_section, r_type); | |
8da6118f | 4288 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 4289 | return FALSE; |
8da6118f | 4290 | } |
8d88c4ca | 4291 | |
d7921315 | 4292 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 4293 | || ABI_64_P (output_bfd)) |
d7921315 L |
4294 | howto = x86_64_elf_howto_table + r_type; |
4295 | else | |
4296 | howto = (x86_64_elf_howto_table | |
4297 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 4298 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
4299 | h = NULL; |
4300 | sym = NULL; | |
4301 | sec = NULL; | |
b34976b6 | 4302 | unresolved_reloc = FALSE; |
8d88c4ca | 4303 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
4304 | { |
4305 | sym = local_syms + r_symndx; | |
4306 | sec = local_sections[r_symndx]; | |
c434dee6 | 4307 | |
c25bc9fc L |
4308 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
4309 | &sec, rel); | |
1788fc08 | 4310 | st_size = sym->st_size; |
c25bc9fc L |
4311 | |
4312 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 4313 | if (!bfd_link_relocatable (info) |
351f65ca | 4314 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 4315 | { |
351f65ca L |
4316 | h = elf_x86_64_get_local_sym_hash (htab, input_bfd, |
4317 | rel, FALSE); | |
c25bc9fc L |
4318 | if (h == NULL) |
4319 | abort (); | |
4320 | ||
eed180f8 | 4321 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
4322 | h->root.u.def.value = sym->st_value; |
4323 | h->root.u.def.section = sec; | |
4324 | } | |
8da6118f | 4325 | } |
8d88c4ca | 4326 | else |
8da6118f | 4327 | { |
c9736ba0 | 4328 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 4329 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
c434dee6 | 4330 | |
b2a8e766 AM |
4331 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
4332 | r_symndx, symtab_hdr, sym_hashes, | |
4333 | h, sec, relocation, | |
62d887d4 | 4334 | unresolved_reloc, warned, ignored); |
1788fc08 | 4335 | st_size = h->size; |
8da6118f | 4336 | } |
ab96bf03 | 4337 | |
dbaa2011 | 4338 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
4339 | { |
4340 | _bfd_clear_contents (howto, input_bfd, input_section, | |
4341 | contents + rel->r_offset); | |
4342 | wrel->r_offset = rel->r_offset; | |
4343 | wrel->r_info = 0; | |
4344 | wrel->r_addend = 0; | |
4345 | ||
4346 | /* For ld -r, remove relocations in debug sections against | |
4347 | sections defined in discarded sections. Not done for | |
4348 | eh_frame editing code expects to be present. */ | |
4349 | if (bfd_link_relocatable (info) | |
4350 | && (input_section->flags & SEC_DEBUGGING)) | |
4351 | wrel--; | |
4352 | ||
4353 | continue; | |
4354 | } | |
ab96bf03 | 4355 | |
0e1862bb | 4356 | if (bfd_link_relocatable (info)) |
2d5da473 L |
4357 | { |
4358 | if (wrel != rel) | |
4359 | *wrel = *rel; | |
4360 | continue; | |
4361 | } | |
ab96bf03 | 4362 | |
1788fc08 | 4363 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 4364 | { |
1788fc08 L |
4365 | if (r_type == R_X86_64_64) |
4366 | { | |
4367 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
4368 | zero-extend it to 64bit if addend is zero. */ | |
4369 | r_type = R_X86_64_32; | |
4370 | memset (contents + rel->r_offset + 4, 0, 4); | |
4371 | } | |
4372 | else if (r_type == R_X86_64_SIZE64) | |
4373 | { | |
4374 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
4375 | zero-extend it to 64bit if addend is zero. */ | |
4376 | r_type = R_X86_64_SIZE32; | |
4377 | memset (contents + rel->r_offset + 4, 0, 4); | |
4378 | } | |
64d25c44 L |
4379 | } |
4380 | ||
0ff2b86e L |
4381 | eh = (struct elf_x86_64_link_hash_entry *) h; |
4382 | ||
cbe950e9 L |
4383 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
4384 | it here if it is defined in a non-shared object. */ | |
4385 | if (h != NULL | |
4386 | && h->type == STT_GNU_IFUNC | |
4387 | && h->def_regular) | |
4388 | { | |
cbe950e9 | 4389 | bfd_vma plt_index; |
4c544807 | 4390 | const char *name; |
cbe950e9 | 4391 | |
97dc35c8 L |
4392 | if ((input_section->flags & SEC_ALLOC) == 0) |
4393 | { | |
4394 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
4395 | sections because such sections are not SEC_ALLOC and | |
4396 | thus ld.so will not process them. */ | |
4397 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 4398 | continue; |
97dc35c8 L |
4399 | abort (); |
4400 | } | |
233cc9c1 L |
4401 | |
4402 | switch (r_type) | |
4403 | { | |
4404 | default: | |
4405 | break; | |
4406 | ||
4407 | case R_X86_64_GOTPCREL: | |
4408 | case R_X86_64_GOTPCRELX: | |
4409 | case R_X86_64_REX_GOTPCRELX: | |
4410 | case R_X86_64_GOTPCREL64: | |
4411 | base_got = htab->elf.sgot; | |
4412 | off = h->got.offset; | |
4413 | ||
4414 | if (base_got == NULL) | |
4415 | abort (); | |
4416 | ||
4417 | if (off == (bfd_vma) -1) | |
4418 | { | |
4419 | /* We can't use h->got.offset here to save state, or | |
4420 | even just remember the offset, as finish_dynamic_symbol | |
4421 | would use that as offset into .got. */ | |
4422 | ||
4423 | if (h->plt.offset == (bfd_vma) -1) | |
4424 | abort (); | |
4425 | ||
4426 | if (htab->elf.splt != NULL) | |
4427 | { | |
4428 | plt_index = h->plt.offset / plt_entry_size - 1; | |
4429 | off = (plt_index + 3) * GOT_ENTRY_SIZE; | |
4430 | base_got = htab->elf.sgotplt; | |
4431 | } | |
4432 | else | |
4433 | { | |
4434 | plt_index = h->plt.offset / plt_entry_size; | |
4435 | off = plt_index * GOT_ENTRY_SIZE; | |
4436 | base_got = htab->elf.igotplt; | |
4437 | } | |
4438 | ||
4439 | if (h->dynindx == -1 | |
4440 | || h->forced_local | |
4441 | || info->symbolic) | |
4442 | { | |
4443 | /* This references the local defitionion. We must | |
4444 | initialize this entry in the global offset table. | |
4445 | Since the offset must always be a multiple of 8, | |
4446 | we use the least significant bit to record | |
4447 | whether we have initialized it already. | |
4448 | ||
4449 | When doing a dynamic link, we create a .rela.got | |
4450 | relocation entry to initialize the value. This | |
4451 | is done in the finish_dynamic_symbol routine. */ | |
4452 | if ((off & 1) != 0) | |
4453 | off &= ~1; | |
4454 | else | |
4455 | { | |
4456 | bfd_put_64 (output_bfd, relocation, | |
4457 | base_got->contents + off); | |
4458 | /* Note that this is harmless for the GOTPLT64 | |
4459 | case, as -1 | 1 still is -1. */ | |
4460 | h->got.offset |= 1; | |
4461 | } | |
4462 | } | |
4463 | } | |
4464 | ||
4465 | relocation = (base_got->output_section->vma | |
4466 | + base_got->output_offset + off); | |
4467 | ||
4468 | goto do_relocation; | |
4469 | } | |
4470 | ||
4471 | if (h->plt.offset == (bfd_vma) -1) | |
4472 | { | |
4473 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
4474 | if (r_type == htab->pointer_r_type | |
4475 | && (input_section->flags & SEC_CODE) == 0) | |
4476 | goto do_ifunc_pointer; | |
4477 | goto bad_ifunc_reloc; | |
4478 | } | |
cbe950e9 L |
4479 | |
4480 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
4481 | if (htab->elf.splt != NULL) |
4482 | { | |
4483 | if (htab->plt_bnd != NULL) | |
4484 | { | |
4485 | resolved_plt = htab->plt_bnd; | |
4486 | plt_offset = eh->plt_bnd.offset; | |
4487 | } | |
4488 | else | |
4489 | { | |
4490 | resolved_plt = htab->elf.splt; | |
4491 | plt_offset = h->plt.offset; | |
4492 | } | |
4493 | } | |
4494 | else | |
4495 | { | |
4496 | resolved_plt = htab->elf.iplt; | |
4497 | plt_offset = h->plt.offset; | |
4498 | } | |
4499 | ||
4500 | relocation = (resolved_plt->output_section->vma | |
4501 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
4502 | |
4503 | switch (r_type) | |
4504 | { | |
4505 | default: | |
233cc9c1 | 4506 | bad_ifunc_reloc: |
4c544807 L |
4507 | if (h->root.root.string) |
4508 | name = h->root.root.string; | |
4509 | else | |
4510 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
4511 | NULL); | |
4eca0228 | 4512 | _bfd_error_handler |
695344c0 | 4513 | /* xgettext:c-format */ |
cbe950e9 | 4514 | (_("%B: relocation %s against STT_GNU_IFUNC " |
233cc9c1 L |
4515 | "symbol `%s' isn't supported"), input_bfd, |
4516 | howto->name, name); | |
cbe950e9 L |
4517 | bfd_set_error (bfd_error_bad_value); |
4518 | return FALSE; | |
4519 | ||
4520 | case R_X86_64_32S: | |
0e1862bb | 4521 | if (bfd_link_pic (info)) |
cbe950e9 | 4522 | abort (); |
710ab287 L |
4523 | goto do_relocation; |
4524 | ||
248775ba L |
4525 | case R_X86_64_32: |
4526 | if (ABI_64_P (output_bfd)) | |
4527 | goto do_relocation; | |
17672001 | 4528 | /* FALLTHROUGH */ |
eed180f8 | 4529 | case R_X86_64_64: |
233cc9c1 | 4530 | do_ifunc_pointer: |
710ab287 L |
4531 | if (rel->r_addend != 0) |
4532 | { | |
4c544807 L |
4533 | if (h->root.root.string) |
4534 | name = h->root.root.string; | |
4535 | else | |
4536 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
4537 | sym, NULL); | |
4eca0228 | 4538 | _bfd_error_handler |
695344c0 | 4539 | /* xgettext:c-format */ |
710ab287 L |
4540 | (_("%B: relocation %s against STT_GNU_IFUNC " |
4541 | "symbol `%s' has non-zero addend: %d"), | |
ef77d6af | 4542 | input_bfd, howto->name, name, rel->r_addend); |
710ab287 L |
4543 | bfd_set_error (bfd_error_bad_value); |
4544 | return FALSE; | |
4545 | } | |
4546 | ||
4547 | /* Generate dynamic relcoation only when there is a | |
233cc9c1 L |
4548 | non-GOT reference in a shared object or there is no |
4549 | PLT. */ | |
4550 | if ((bfd_link_pic (info) && h->non_got_ref) | |
4551 | || h->plt.offset == (bfd_vma) -1) | |
710ab287 L |
4552 | { |
4553 | Elf_Internal_Rela outrel; | |
710ab287 L |
4554 | asection *sreloc; |
4555 | ||
c25bc9fc L |
4556 | /* Need a dynamic relocation to get the real function |
4557 | address. */ | |
710ab287 L |
4558 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
4559 | info, | |
4560 | input_section, | |
4561 | rel->r_offset); | |
4562 | if (outrel.r_offset == (bfd_vma) -1 | |
4563 | || outrel.r_offset == (bfd_vma) -2) | |
4564 | abort (); | |
4565 | ||
4566 | outrel.r_offset += (input_section->output_section->vma | |
4567 | + input_section->output_offset); | |
4568 | ||
4569 | if (h->dynindx == -1 | |
44c4ea11 | 4570 | || h->forced_local |
0e1862bb | 4571 | || bfd_link_executable (info)) |
710ab287 L |
4572 | { |
4573 | /* This symbol is resolved locally. */ | |
56b8aada L |
4574 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
4575 | outrel.r_addend = (h->root.u.def.value | |
4576 | + h->root.u.def.section->output_section->vma | |
4577 | + h->root.u.def.section->output_offset); | |
710ab287 L |
4578 | } |
4579 | else | |
4580 | { | |
351f65ca | 4581 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
4582 | outrel.r_addend = 0; |
4583 | } | |
4584 | ||
233cc9c1 L |
4585 | /* Dynamic relocations are stored in |
4586 | 1. .rela.ifunc section in PIC object. | |
4587 | 2. .rela.got section in dynamic executable. | |
4588 | 3. .rela.iplt section in static executable. */ | |
4589 | if (bfd_link_pic (info)) | |
4590 | sreloc = htab->elf.irelifunc; | |
4591 | else if (htab->elf.splt != NULL) | |
4592 | sreloc = htab->elf.srelgot; | |
4593 | else | |
4594 | sreloc = htab->elf.irelplt; | |
351f65ca | 4595 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
4596 | |
4597 | /* If this reloc is against an external symbol, we | |
4598 | do not want to fiddle with the addend. Otherwise, | |
4599 | we need to include the symbol value so that it | |
4600 | becomes an addend for the dynamic reloc. For an | |
4601 | internal symbol, we have updated addend. */ | |
56b8aada | 4602 | continue; |
710ab287 | 4603 | } |
17672001 | 4604 | /* FALLTHROUGH */ |
cbe950e9 | 4605 | case R_X86_64_PC32: |
c3320543 | 4606 | case R_X86_64_PC32_BND: |
cbe950e9 L |
4607 | case R_X86_64_PC64: |
4608 | case R_X86_64_PLT32: | |
c3320543 | 4609 | case R_X86_64_PLT32_BND: |
cbe950e9 | 4610 | goto do_relocation; |
cbe950e9 L |
4611 | } |
4612 | } | |
4613 | ||
aec6b87e | 4614 | resolved_to_zero = (eh != NULL |
e62b9723 L |
4615 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
4616 | eh->has_got_reloc, | |
4617 | eh)); | |
aec6b87e | 4618 | |
70256ad8 AJ |
4619 | /* When generating a shared object, the relocations handled here are |
4620 | copied into the output file to be resolved at run time. */ | |
4621 | switch (r_type) | |
4622 | { | |
4623 | case R_X86_64_GOT32: | |
7b81dfbb | 4624 | case R_X86_64_GOT64: |
70256ad8 AJ |
4625 | /* Relocation is to the entry for this symbol in the global |
4626 | offset table. */ | |
70256ad8 | 4627 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
4628 | case R_X86_64_GOTPCRELX: |
4629 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
4630 | case R_X86_64_GOTPCREL64: |
4631 | /* Use global offset table entry as symbol value. */ | |
4632 | case R_X86_64_GOTPLT64: | |
553d1284 | 4633 | /* This is obsolete and treated the the same as GOT64. */ |
6de2ae4a | 4634 | base_got = htab->elf.sgot; |
7b81dfbb | 4635 | |
6de2ae4a | 4636 | if (htab->elf.sgot == NULL) |
c434dee6 | 4637 | abort (); |
053579d7 | 4638 | |
51e0a107 | 4639 | if (h != NULL) |
70256ad8 | 4640 | { |
b34976b6 | 4641 | bfd_boolean dyn; |
c434dee6 AJ |
4642 | |
4643 | off = h->got.offset; | |
7b81dfbb | 4644 | if (h->needs_plt |
eed180f8 | 4645 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
4646 | && off == (bfd_vma)-1) |
4647 | { | |
4648 | /* We can't use h->got.offset here to save | |
4649 | state, or even just remember the offset, as | |
4650 | finish_dynamic_symbol would use that as offset into | |
4651 | .got. */ | |
eed180f8 | 4652 | bfd_vma plt_index = h->plt.offset / plt_entry_size - 1; |
7b81dfbb | 4653 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 4654 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
4655 | } |
4656 | ||
c434dee6 | 4657 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 4658 | |
0e1862bb L |
4659 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
4660 | || (bfd_link_pic (info) | |
27482721 | 4661 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
4662 | || (ELF_ST_VISIBILITY (h->other) |
4663 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
4664 | { |
4665 | /* This is actually a static link, or it is a -Bsymbolic | |
4666 | link and the symbol is defined locally, or the symbol | |
407443a3 | 4667 | was forced to be local because of a version file. We |
51e0a107 JH |
4668 | must initialize this entry in the global offset table. |
4669 | Since the offset must always be a multiple of 8, we | |
4670 | use the least significant bit to record whether we | |
4671 | have initialized it already. | |
4672 | ||
4673 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
4674 | relocation entry to initialize the value. This is |
4675 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
4676 | if ((off & 1) != 0) |
4677 | off &= ~1; | |
4678 | else | |
4679 | { | |
4680 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
4681 | base_got->contents + off); |
4682 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 4683 | as -1 | 1 still is -1. */ |
51e0a107 JH |
4684 | h->got.offset |= 1; |
4685 | } | |
4686 | } | |
053579d7 | 4687 | else |
b34976b6 | 4688 | unresolved_reloc = FALSE; |
70256ad8 | 4689 | } |
51e0a107 JH |
4690 | else |
4691 | { | |
c434dee6 AJ |
4692 | if (local_got_offsets == NULL) |
4693 | abort (); | |
51e0a107 JH |
4694 | |
4695 | off = local_got_offsets[r_symndx]; | |
4696 | ||
4697 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
4698 | the least significant bit to record whether we have |
4699 | already generated the necessary reloc. */ | |
51e0a107 JH |
4700 | if ((off & 1) != 0) |
4701 | off &= ~1; | |
4702 | else | |
4703 | { | |
c434dee6 | 4704 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 4705 | base_got->contents + off); |
51e0a107 | 4706 | |
0e1862bb | 4707 | if (bfd_link_pic (info)) |
51e0a107 | 4708 | { |
947216bf | 4709 | asection *s; |
51e0a107 | 4710 | Elf_Internal_Rela outrel; |
70256ad8 | 4711 | |
51e0a107 JH |
4712 | /* We need to generate a R_X86_64_RELATIVE reloc |
4713 | for the dynamic linker. */ | |
6de2ae4a | 4714 | s = htab->elf.srelgot; |
947216bf | 4715 | if (s == NULL) |
c434dee6 | 4716 | abort (); |
51e0a107 | 4717 | |
7b81dfbb AJ |
4718 | outrel.r_offset = (base_got->output_section->vma |
4719 | + base_got->output_offset | |
51e0a107 | 4720 | + off); |
351f65ca | 4721 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
51e0a107 | 4722 | outrel.r_addend = relocation; |
351f65ca | 4723 | elf_append_rela (output_bfd, s, &outrel); |
51e0a107 JH |
4724 | } |
4725 | ||
4726 | local_got_offsets[r_symndx] |= 1; | |
4727 | } | |
51e0a107 | 4728 | } |
6a2bda3f | 4729 | |
c434dee6 AJ |
4730 | if (off >= (bfd_vma) -2) |
4731 | abort (); | |
4732 | ||
7b81dfbb AJ |
4733 | relocation = base_got->output_section->vma |
4734 | + base_got->output_offset + off; | |
56ceb5b5 L |
4735 | if (r_type != R_X86_64_GOTPCREL |
4736 | && r_type != R_X86_64_GOTPCRELX | |
4737 | && r_type != R_X86_64_REX_GOTPCRELX | |
4738 | && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
4739 | relocation -= htab->elf.sgotplt->output_section->vma |
4740 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 4741 | |
70256ad8 AJ |
4742 | break; |
4743 | ||
d6ab8113 JB |
4744 | case R_X86_64_GOTOFF64: |
4745 | /* Relocation is relative to the start of the global offset | |
4746 | table. */ | |
4747 | ||
3d949995 L |
4748 | /* Check to make sure it isn't a protected function or data |
4749 | symbol for shared library since it may not be local when | |
e3c0e327 L |
4750 | used as function address or with copy relocation. We also |
4751 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 4752 | if (bfd_link_pic (info) && h) |
d6ab8113 | 4753 | { |
e3c0e327 L |
4754 | if (!h->def_regular) |
4755 | { | |
4756 | const char *v; | |
4757 | ||
4758 | switch (ELF_ST_VISIBILITY (h->other)) | |
4759 | { | |
4760 | case STV_HIDDEN: | |
4761 | v = _("hidden symbol"); | |
4762 | break; | |
4763 | case STV_INTERNAL: | |
4764 | v = _("internal symbol"); | |
4765 | break; | |
4766 | case STV_PROTECTED: | |
4767 | v = _("protected symbol"); | |
4768 | break; | |
4769 | default: | |
4770 | v = _("symbol"); | |
4771 | break; | |
4772 | } | |
4773 | ||
4eca0228 | 4774 | _bfd_error_handler |
695344c0 | 4775 | /* xgettext:c-format */ |
e3c0e327 L |
4776 | (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s `%s' can not be used when making a shared object"), |
4777 | input_bfd, v, h->root.root.string); | |
4778 | bfd_set_error (bfd_error_bad_value); | |
4779 | return FALSE; | |
4780 | } | |
0e1862bb | 4781 | else if (!bfd_link_executable (info) |
e3c0e327 L |
4782 | && !SYMBOL_REFERENCES_LOCAL (info, h) |
4783 | && (h->type == STT_FUNC | |
4784 | || h->type == STT_OBJECT) | |
4785 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
4786 | { | |
4eca0228 | 4787 | _bfd_error_handler |
695344c0 | 4788 | /* xgettext:c-format */ |
e3c0e327 L |
4789 | (_("%B: relocation R_X86_64_GOTOFF64 against protected %s `%s' can not be used when making a shared object"), |
4790 | input_bfd, | |
4791 | h->type == STT_FUNC ? "function" : "data", | |
4792 | h->root.root.string); | |
4793 | bfd_set_error (bfd_error_bad_value); | |
d6ab8113 | 4794 | return FALSE; |
e3c0e327 | 4795 | } |
d6ab8113 JB |
4796 | } |
4797 | ||
4798 | /* Note that sgot is not involved in this | |
4799 | calculation. We always want the start of .got.plt. If we | |
4800 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
4801 | permitted by the ABI, we might have to change this | |
4802 | calculation. */ | |
6de2ae4a L |
4803 | relocation -= htab->elf.sgotplt->output_section->vma |
4804 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4805 | break; |
4806 | ||
4807 | case R_X86_64_GOTPC32: | |
7b81dfbb | 4808 | case R_X86_64_GOTPC64: |
d6ab8113 | 4809 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
4810 | relocation = htab->elf.sgotplt->output_section->vma |
4811 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4812 | unresolved_reloc = FALSE; |
4813 | break; | |
7b81dfbb AJ |
4814 | |
4815 | case R_X86_64_PLTOFF64: | |
4816 | /* Relocation is PLT entry relative to GOT. For local | |
4817 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 4818 | if (h != NULL |
7b81dfbb | 4819 | /* See PLT32 handling. */ |
9d734efa L |
4820 | && (h->plt.offset != (bfd_vma) -1 |
4821 | || eh->plt_got.offset != (bfd_vma) -1) | |
6de2ae4a | 4822 | && htab->elf.splt != NULL) |
7b81dfbb | 4823 | { |
9d734efa L |
4824 | if (eh->plt_got.offset != (bfd_vma) -1) |
4825 | { | |
4826 | /* Use the GOT PLT. */ | |
4827 | resolved_plt = htab->plt_got; | |
4828 | plt_offset = eh->plt_got.offset; | |
4829 | } | |
4830 | else if (htab->plt_bnd != NULL) | |
0ff2b86e L |
4831 | { |
4832 | resolved_plt = htab->plt_bnd; | |
4833 | plt_offset = eh->plt_bnd.offset; | |
4834 | } | |
4835 | else | |
4836 | { | |
4837 | resolved_plt = htab->elf.splt; | |
4838 | plt_offset = h->plt.offset; | |
4839 | } | |
4840 | ||
4841 | relocation = (resolved_plt->output_section->vma | |
4842 | + resolved_plt->output_offset | |
4843 | + plt_offset); | |
7b81dfbb AJ |
4844 | unresolved_reloc = FALSE; |
4845 | } | |
4846 | ||
6de2ae4a L |
4847 | relocation -= htab->elf.sgotplt->output_section->vma |
4848 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 4849 | break; |
d6ab8113 | 4850 | |
70256ad8 | 4851 | case R_X86_64_PLT32: |
c3320543 | 4852 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
4853 | /* Relocation is to the entry for this symbol in the |
4854 | procedure linkage table. */ | |
4855 | ||
4856 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 4857 | without using the procedure linkage table. */ |
70256ad8 AJ |
4858 | if (h == NULL) |
4859 | break; | |
4860 | ||
dd7e64d4 L |
4861 | if ((h->plt.offset == (bfd_vma) -1 |
4862 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 4863 | || htab->elf.splt == NULL) |
70256ad8 AJ |
4864 | { |
4865 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
4866 | happens when statically linking PIC code, or when |
4867 | using -Bsymbolic. */ | |
70256ad8 AJ |
4868 | break; |
4869 | } | |
4870 | ||
dd7e64d4 | 4871 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 4872 | { |
dd7e64d4 L |
4873 | if (htab->plt_bnd != NULL) |
4874 | { | |
4875 | resolved_plt = htab->plt_bnd; | |
4876 | plt_offset = eh->plt_bnd.offset; | |
4877 | } | |
4878 | else | |
4879 | { | |
4880 | resolved_plt = htab->elf.splt; | |
4881 | plt_offset = h->plt.offset; | |
4882 | } | |
0ff2b86e L |
4883 | } |
4884 | else | |
4885 | { | |
dd7e64d4 L |
4886 | /* Use the GOT PLT. */ |
4887 | resolved_plt = htab->plt_got; | |
4888 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
4889 | } |
4890 | ||
4891 | relocation = (resolved_plt->output_section->vma | |
4892 | + resolved_plt->output_offset | |
4893 | + plt_offset); | |
b34976b6 | 4894 | unresolved_reloc = FALSE; |
70256ad8 AJ |
4895 | break; |
4896 | ||
1788fc08 L |
4897 | case R_X86_64_SIZE32: |
4898 | case R_X86_64_SIZE64: | |
1788fc08 L |
4899 | /* Set to symbol size. */ |
4900 | relocation = st_size; | |
4901 | goto direct; | |
4902 | ||
fd8ab9e5 AJ |
4903 | case R_X86_64_PC8: |
4904 | case R_X86_64_PC16: | |
4905 | case R_X86_64_PC32: | |
c3320543 | 4906 | case R_X86_64_PC32_BND: |
6333bc0d | 4907 | /* Don't complain about -fPIC if the symbol is undefined when |
aec6b87e L |
4908 | building executable unless it is unresolved weak symbol. */ |
4909 | if ((input_section->flags & SEC_ALLOC) != 0 | |
90f487df | 4910 | && (input_section->flags & SEC_READONLY) != 0 |
6333bc0d | 4911 | && h != NULL |
aec6b87e L |
4912 | && ((bfd_link_executable (info) |
4913 | && h->root.type == bfd_link_hash_undefweak | |
4914 | && !resolved_to_zero) | |
4915 | || (bfd_link_pic (info) | |
4916 | && !(bfd_link_pie (info) | |
4917 | && h->root.type == bfd_link_hash_undefined)))) | |
6610a52d | 4918 | { |
41bed6dd L |
4919 | bfd_boolean fail = FALSE; |
4920 | bfd_boolean branch | |
c3320543 L |
4921 | = ((r_type == R_X86_64_PC32 |
4922 | || r_type == R_X86_64_PC32_BND) | |
41bed6dd L |
4923 | && is_32bit_relative_branch (contents, rel->r_offset)); |
4924 | ||
4925 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
4926 | { | |
4927 | /* Symbol is referenced locally. Make sure it is | |
4928 | defined locally or for a branch. */ | |
4929 | fail = !h->def_regular && !branch; | |
4930 | } | |
aec6b87e | 4931 | else if (!(bfd_link_pie (info) |
bc696fd5 | 4932 | && (h->needs_copy || eh->needs_copy))) |
41bed6dd | 4933 | { |
9a926d55 L |
4934 | /* Symbol doesn't need copy reloc and isn't referenced |
4935 | locally. We only allow branch to symbol with | |
4936 | non-default visibility. */ | |
41bed6dd L |
4937 | fail = (!branch |
4938 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
4939 | } | |
4940 | ||
4941 | if (fail) | |
338c190a L |
4942 | return elf_x86_64_need_pic (input_bfd, input_section, |
4943 | h, NULL, NULL, howto); | |
6610a52d L |
4944 | } |
4945 | /* Fall through. */ | |
4946 | ||
70256ad8 AJ |
4947 | case R_X86_64_8: |
4948 | case R_X86_64_16: | |
4949 | case R_X86_64_32: | |
d6ab8113 | 4950 | case R_X86_64_PC64: |
6b3db546 | 4951 | case R_X86_64_64: |
80643fbc | 4952 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 4953 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 4954 | |
1788fc08 | 4955 | direct: |
b1e24c02 | 4956 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
4957 | break; |
4958 | ||
9a926d55 | 4959 | /* Don't copy a pc-relative relocation into the output file |
6333bc0d | 4960 | if the symbol needs copy reloc or the symbol is undefined |
04ebc307 | 4961 | when building executable. Copy dynamic function pointer |
aec6b87e L |
4962 | relocations. Don't generate dynamic relocations against |
4963 | resolved undefined weak symbols in PIE. */ | |
0e1862bb | 4964 | if ((bfd_link_pic (info) |
aec6b87e | 4965 | && !(bfd_link_pie (info) |
fd9edc90 | 4966 | && h != NULL |
6333bc0d L |
4967 | && (h->needs_copy |
4968 | || eh->needs_copy | |
4969 | || h->root.type == bfd_link_hash_undefined) | |
d8457a04 L |
4970 | && (IS_X86_64_PCREL_TYPE (r_type) |
4971 | || r_type == R_X86_64_SIZE32 | |
4972 | || r_type == R_X86_64_SIZE64)) | |
4bc6e03a | 4973 | && (h == NULL |
aec6b87e L |
4974 | || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
4975 | && !resolved_to_zero) | |
4976 | || h->root.type != bfd_link_hash_undefweak)) | |
1788fc08 L |
4977 | && ((! IS_X86_64_PCREL_TYPE (r_type) |
4978 | && r_type != R_X86_64_SIZE32 | |
4979 | && r_type != R_X86_64_SIZE64) | |
d8045f23 | 4980 | || ! SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c | 4981 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 4982 | && !bfd_link_pic (info) |
c434dee6 AJ |
4983 | && h != NULL |
4984 | && h->dynindx != -1 | |
aec6b87e L |
4985 | && (!h->non_got_ref |
4986 | || eh->func_pointer_refcount > 0 | |
4987 | || (h->root.type == bfd_link_hash_undefweak | |
4988 | && !resolved_to_zero)) | |
bae420ef L |
4989 | && ((h->def_dynamic && !h->def_regular) |
4990 | /* Undefined weak symbol is bound locally when | |
4991 | PIC is false. */ | |
0f88be7a | 4992 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
4993 | { |
4994 | Elf_Internal_Rela outrel; | |
b34976b6 | 4995 | bfd_boolean skip, relocate; |
c434dee6 | 4996 | asection *sreloc; |
70256ad8 AJ |
4997 | |
4998 | /* When generating a shared object, these relocations | |
4999 | are copied into the output file to be resolved at run | |
407443a3 | 5000 | time. */ |
b34976b6 AM |
5001 | skip = FALSE; |
5002 | relocate = FALSE; | |
70256ad8 | 5003 | |
c629eae0 JJ |
5004 | outrel.r_offset = |
5005 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 5006 | rel->r_offset); |
c629eae0 | 5007 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 5008 | skip = TRUE; |
0fb19cbc | 5009 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 5010 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
5011 | |
5012 | outrel.r_offset += (input_section->output_section->vma | |
5013 | + input_section->output_offset); | |
5014 | ||
5015 | if (skip) | |
0bb2d96a | 5016 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 5017 | |
fd8ab9e5 AJ |
5018 | /* h->dynindx may be -1 if this symbol was marked to |
5019 | become local. */ | |
5020 | else if (h != NULL | |
c434dee6 | 5021 | && h->dynindx != -1 |
d8045f23 | 5022 | && (IS_X86_64_PCREL_TYPE (r_type) |
4e0c91e4 L |
5023 | || !(bfd_link_executable (info) |
5024 | || SYMBOLIC_BIND (info, h)) | |
d8045f23 | 5025 | || ! h->def_regular)) |
70256ad8 | 5026 | { |
351f65ca | 5027 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 5028 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
5029 | } |
5030 | else | |
5031 | { | |
4c10bbaa L |
5032 | /* This symbol is local, or marked to become local. |
5033 | When relocation overflow check is disabled, we | |
5034 | convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
5035 | if (r_type == htab->pointer_r_type | |
5036 | || (r_type == R_X86_64_32 | |
5037 | && info->no_reloc_overflow_check)) | |
607c0e09 | 5038 | { |
b34976b6 | 5039 | relocate = TRUE; |
351f65ca | 5040 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
5041 | outrel.r_addend = relocation + rel->r_addend; |
5042 | } | |
64d25c44 L |
5043 | else if (r_type == R_X86_64_64 |
5044 | && !ABI_64_P (output_bfd)) | |
5045 | { | |
5046 | relocate = TRUE; | |
5047 | outrel.r_info = htab->r_info (0, | |
5048 | R_X86_64_RELATIVE64); | |
5049 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
5050 | /* Check addend overflow. */ |
5051 | if ((outrel.r_addend & 0x80000000) | |
5052 | != (rel->r_addend & 0x80000000)) | |
5053 | { | |
5054 | const char *name; | |
268a8d3a | 5055 | int addend = rel->r_addend; |
8cf0d2dd L |
5056 | if (h && h->root.root.string) |
5057 | name = h->root.root.string; | |
5058 | else | |
5059 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
5060 | sym, NULL); | |
6f2c9068 | 5061 | if (addend < 0) |
4eca0228 | 5062 | _bfd_error_handler |
695344c0 | 5063 | /* xgettext:c-format */ |
268a8d3a | 5064 | (_("%B: addend -0x%x in relocation %s against " |
6f2c9068 L |
5065 | "symbol `%s' at 0x%lx in section `%A' is " |
5066 | "out of range"), | |
5067 | input_bfd, input_section, addend, | |
ef77d6af L |
5068 | howto->name, name, |
5069 | (unsigned long) rel->r_offset); | |
6f2c9068 | 5070 | else |
4eca0228 | 5071 | _bfd_error_handler |
695344c0 | 5072 | /* xgettext:c-format */ |
268a8d3a | 5073 | (_("%B: addend 0x%x in relocation %s against " |
6f2c9068 L |
5074 | "symbol `%s' at 0x%lx in section `%A' is " |
5075 | "out of range"), | |
5076 | input_bfd, input_section, addend, | |
ef77d6af L |
5077 | howto->name, name, |
5078 | (unsigned long) rel->r_offset); | |
8cf0d2dd L |
5079 | bfd_set_error (bfd_error_bad_value); |
5080 | return FALSE; | |
5081 | } | |
64d25c44 | 5082 | } |
607c0e09 AS |
5083 | else |
5084 | { | |
5085 | long sindx; | |
5086 | ||
8517fae7 | 5087 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
5088 | sindx = 0; |
5089 | else if (sec == NULL || sec->owner == NULL) | |
5090 | { | |
5091 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 5092 | return FALSE; |
607c0e09 AS |
5093 | } |
5094 | else | |
5095 | { | |
5096 | asection *osec; | |
5097 | ||
74541ad4 AM |
5098 | /* We are turning this relocation into one |
5099 | against a section symbol. It would be | |
5100 | proper to subtract the symbol's value, | |
5101 | osec->vma, from the emitted reloc addend, | |
5102 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
5103 | osec = sec->output_section; |
5104 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
5105 | if (sindx == 0) |
5106 | { | |
5107 | asection *oi = htab->elf.text_index_section; | |
5108 | sindx = elf_section_data (oi)->dynindx; | |
5109 | } | |
5110 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
5111 | } |
5112 | ||
351f65ca | 5113 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
5114 | outrel.r_addend = relocation + rel->r_addend; |
5115 | } | |
70256ad8 AJ |
5116 | } |
5117 | ||
cbe950e9 | 5118 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 5119 | |
62d78908 L |
5120 | if (sreloc == NULL || sreloc->contents == NULL) |
5121 | { | |
5122 | r = bfd_reloc_notsupported; | |
5123 | goto check_relocation_error; | |
5124 | } | |
c434dee6 | 5125 | |
351f65ca | 5126 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
5127 | |
5128 | /* If this reloc is against an external symbol, we do | |
5129 | not want to fiddle with the addend. Otherwise, we | |
5130 | need to include the symbol value so that it becomes | |
5131 | an addend for the dynamic reloc. */ | |
0f88be7a | 5132 | if (! relocate) |
70256ad8 AJ |
5133 | continue; |
5134 | } | |
5135 | ||
5136 | break; | |
5137 | ||
bffbf940 | 5138 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
5139 | case R_X86_64_GOTPC32_TLSDESC: |
5140 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 5141 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
5142 | tls_type = GOT_UNKNOWN; |
5143 | if (h == NULL && local_got_offsets) | |
351f65ca | 5144 | tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 5145 | else if (h != NULL) |
351f65ca | 5146 | tls_type = elf_x86_64_hash_entry (h)->tls_type; |
142411ca | 5147 | |
351f65ca L |
5148 | if (! elf_x86_64_tls_transition (info, input_bfd, |
5149 | input_section, contents, | |
5150 | symtab_hdr, sym_hashes, | |
5151 | &r_type, tls_type, rel, | |
bedfd056 | 5152 | relend, h, r_symndx, TRUE)) |
534a31f6 | 5153 | return FALSE; |
bffbf940 JJ |
5154 | |
5155 | if (r_type == R_X86_64_TPOFF32) | |
5156 | { | |
142411ca L |
5157 | bfd_vma roff = rel->r_offset; |
5158 | ||
bffbf940 | 5159 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 5160 | |
351f65ca | 5161 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 5162 | { |
52bc799a | 5163 | /* GD->LE transition. For 64bit, change |
e2cbcd91 L |
5164 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
5165 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5166 | or | |
5167 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
5168 | .byte 0x66; rex64 | |
5169 | call *__tls_get_addr@GOTPCREL(%rip) | |
5170 | which may be converted to | |
5171 | addr32 call __tls_get_addr | |
52bc799a | 5172 | into: |
e2cbcd91 L |
5173 | movq %fs:0, %rax |
5174 | leaq foo@tpoff(%rax), %rax | |
52bc799a | 5175 | For 32bit, change |
e2cbcd91 L |
5176 | leaq foo@tlsgd(%rip), %rdi |
5177 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5178 | or | |
5179 | leaq foo@tlsgd(%rip), %rdi | |
5180 | .byte 0x66; rex64 | |
5181 | call *__tls_get_addr@GOTPCREL(%rip) | |
5182 | which may be converted to | |
5183 | addr32 call __tls_get_addr | |
52bc799a | 5184 | into: |
e2cbcd91 L |
5185 | movl %fs:0, %eax |
5186 | leaq foo@tpoff(%rax), %rax | |
5c98a14e | 5187 | For largepic, change: |
e2cbcd91 L |
5188 | leaq foo@tlsgd(%rip), %rdi |
5189 | movabsq $__tls_get_addr@pltoff, %rax | |
5190 | addq %r15, %rax | |
5191 | call *%rax | |
5c98a14e | 5192 | into: |
e2cbcd91 L |
5193 | movq %fs:0, %rax |
5194 | leaq foo@tpoff(%rax), %rax | |
5195 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 5196 | int largepic = 0; |
e2cbcd91 | 5197 | if (ABI_64_P (output_bfd)) |
5c98a14e | 5198 | { |
e2cbcd91 L |
5199 | if (contents[roff + 5] == 0xb8) |
5200 | { | |
5201 | memcpy (contents + roff - 3, | |
5202 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
5203 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
5204 | largepic = 1; | |
5205 | } | |
5206 | else | |
5207 | memcpy (contents + roff - 4, | |
5208 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
5209 | 16); | |
5c98a14e | 5210 | } |
52bc799a L |
5211 | else |
5212 | memcpy (contents + roff - 3, | |
5213 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
5214 | 15); | |
eb4ff4d6 | 5215 | bfd_put_32 (output_bfd, |
351f65ca | 5216 | elf_x86_64_tpoff (info, relocation), |
5c98a14e | 5217 | contents + roff + 8 + largepic); |
e2cbcd91 L |
5218 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, |
5219 | R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */ | |
bffbf940 | 5220 | rel++; |
60f2e42e | 5221 | wrel++; |
bffbf940 JJ |
5222 | continue; |
5223 | } | |
351f65ca | 5224 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
5225 | { |
5226 | /* GDesc -> LE transition. | |
5227 | It's originally something like: | |
5228 | leaq x@tlsdesc(%rip), %rax | |
5229 | ||
5230 | Change it to: | |
c9736ba0 | 5231 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 5232 | |
c9736ba0 | 5233 | unsigned int val, type; |
67a4f2b7 | 5234 | |
67a4f2b7 | 5235 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 5236 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
5237 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
5238 | contents + roff - 3); | |
5239 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
5240 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
5241 | contents + roff - 1); | |
eb4ff4d6 | 5242 | bfd_put_32 (output_bfd, |
351f65ca | 5243 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
5244 | contents + roff); |
5245 | continue; | |
5246 | } | |
351f65ca | 5247 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
5248 | { |
5249 | /* GDesc -> LE transition. | |
5250 | It's originally: | |
5251 | call *(%rax) | |
5252 | Turn it into: | |
142411ca | 5253 | xchg %ax,%ax. */ |
10efb593 | 5254 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
5255 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
5256 | continue; | |
5257 | } | |
351f65ca | 5258 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 5259 | { |
bffbf940 | 5260 | /* IE->LE transition: |
cf61b747 | 5261 | For 64bit, originally it can be one of: |
bffbf940 JJ |
5262 | movq foo@gottpoff(%rip), %reg |
5263 | addq foo@gottpoff(%rip), %reg | |
5264 | We change it into: | |
5265 | movq $foo, %reg | |
5266 | leaq foo(%reg), %reg | |
cf61b747 L |
5267 | addq $foo, %reg. |
5268 | For 32bit, originally it can be one of: | |
5269 | movq foo@gottpoff(%rip), %reg | |
5270 | addl foo@gottpoff(%rip), %reg | |
5271 | We change it into: | |
5272 | movq $foo, %reg | |
5273 | leal foo(%reg), %reg | |
5274 | addl $foo, %reg. */ | |
142411ca L |
5275 | |
5276 | unsigned int val, type, reg; | |
5277 | ||
cf61b747 L |
5278 | if (roff >= 3) |
5279 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
5280 | else | |
5281 | val = 0; | |
142411ca L |
5282 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
5283 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 5284 | reg >>= 3; |
bffbf940 JJ |
5285 | if (type == 0x8b) |
5286 | { | |
5287 | /* movq */ | |
5288 | if (val == 0x4c) | |
5289 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 5290 | contents + roff - 3); |
4a4c5f25 L |
5291 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5292 | bfd_put_8 (output_bfd, 0x41, | |
5293 | contents + roff - 3); | |
bffbf940 | 5294 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 5295 | contents + roff - 2); |
bffbf940 | 5296 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 5297 | contents + roff - 1); |
bffbf940 JJ |
5298 | } |
5299 | else if (reg == 4) | |
5300 | { | |
cf61b747 L |
5301 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
5302 | is special */ | |
bffbf940 JJ |
5303 | if (val == 0x4c) |
5304 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 5305 | contents + roff - 3); |
4a4c5f25 L |
5306 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5307 | bfd_put_8 (output_bfd, 0x41, | |
5308 | contents + roff - 3); | |
bffbf940 | 5309 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 5310 | contents + roff - 2); |
bffbf940 | 5311 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 5312 | contents + roff - 1); |
bffbf940 JJ |
5313 | } |
5314 | else | |
5315 | { | |
cf61b747 | 5316 | /* addq/addl -> leaq/leal */ |
bffbf940 JJ |
5317 | if (val == 0x4c) |
5318 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 5319 | contents + roff - 3); |
4a4c5f25 L |
5320 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5321 | bfd_put_8 (output_bfd, 0x45, | |
5322 | contents + roff - 3); | |
bffbf940 | 5323 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 5324 | contents + roff - 2); |
bffbf940 | 5325 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 5326 | contents + roff - 1); |
bffbf940 | 5327 | } |
eb4ff4d6 | 5328 | bfd_put_32 (output_bfd, |
351f65ca | 5329 | elf_x86_64_tpoff (info, relocation), |
142411ca | 5330 | contents + roff); |
bffbf940 JJ |
5331 | continue; |
5332 | } | |
142411ca L |
5333 | else |
5334 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
5335 | } |
5336 | ||
6de2ae4a | 5337 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
5338 | abort (); |
5339 | ||
5340 | if (h != NULL) | |
67a4f2b7 AO |
5341 | { |
5342 | off = h->got.offset; | |
351f65ca | 5343 | offplt = elf_x86_64_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 5344 | } |
bffbf940 JJ |
5345 | else |
5346 | { | |
5347 | if (local_got_offsets == NULL) | |
5348 | abort (); | |
5349 | ||
5350 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 5351 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
5352 | } |
5353 | ||
5354 | if ((off & 1) != 0) | |
5355 | off &= ~1; | |
26e41594 | 5356 | else |
bffbf940 JJ |
5357 | { |
5358 | Elf_Internal_Rela outrel; | |
bffbf940 | 5359 | int dr_type, indx; |
67a4f2b7 | 5360 | asection *sreloc; |
bffbf940 | 5361 | |
6de2ae4a | 5362 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
5363 | abort (); |
5364 | ||
67a4f2b7 AO |
5365 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
5366 | ||
5367 | if (GOT_TLS_GDESC_P (tls_type)) | |
5368 | { | |
351f65ca | 5369 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 5370 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
5371 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
5372 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
5373 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
5374 | + offplt |
5375 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 5376 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 5377 | if (indx == 0) |
351f65ca | 5378 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
67a4f2b7 AO |
5379 | else |
5380 | outrel.r_addend = 0; | |
351f65ca | 5381 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
5382 | } |
5383 | ||
6de2ae4a | 5384 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 5385 | |
6de2ae4a L |
5386 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5387 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 5388 | |
67a4f2b7 | 5389 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 5390 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
5391 | else if (GOT_TLS_GDESC_P (tls_type)) |
5392 | goto dr_done; | |
bffbf940 JJ |
5393 | else |
5394 | dr_type = R_X86_64_TPOFF64; | |
5395 | ||
6de2ae4a | 5396 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 5397 | outrel.r_addend = 0; |
67a4f2b7 AO |
5398 | if ((dr_type == R_X86_64_TPOFF64 |
5399 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
351f65ca L |
5400 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
5401 | outrel.r_info = htab->r_info (indx, dr_type); | |
bffbf940 | 5402 | |
351f65ca | 5403 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 5404 | |
67a4f2b7 | 5405 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
5406 | { |
5407 | if (indx == 0) | |
5408 | { | |
d40d037c | 5409 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 5410 | bfd_put_64 (output_bfd, |
351f65ca | 5411 | relocation - elf_x86_64_dtpoff_base (info), |
6de2ae4a | 5412 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
5413 | } |
5414 | else | |
5415 | { | |
5416 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5417 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5418 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
5419 | R_X86_64_DTPOFF64); |
5420 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 5421 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 5422 | &outrel); |
bffbf940 JJ |
5423 | } |
5424 | } | |
5425 | ||
67a4f2b7 | 5426 | dr_done: |
bffbf940 JJ |
5427 | if (h != NULL) |
5428 | h->got.offset |= 1; | |
5429 | else | |
5430 | local_got_offsets[r_symndx] |= 1; | |
5431 | } | |
5432 | ||
67a4f2b7 AO |
5433 | if (off >= (bfd_vma) -2 |
5434 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 5435 | abort (); |
351f65ca | 5436 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 5437 | { |
67a4f2b7 AO |
5438 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
5439 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
5440 | relocation = htab->elf.sgotplt->output_section->vma |
5441 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
5442 | + offplt + htab->sgotplt_jump_table_size; |
5443 | else | |
6de2ae4a L |
5444 | relocation = htab->elf.sgot->output_section->vma |
5445 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5446 | unresolved_reloc = FALSE; |
bffbf940 | 5447 | } |
142411ca | 5448 | else |
67a4f2b7 | 5449 | { |
142411ca | 5450 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 5451 | |
351f65ca | 5452 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 5453 | { |
52bc799a | 5454 | /* GD->IE transition. For 64bit, change |
e2cbcd91 L |
5455 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
5456 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5457 | or | |
5458 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
5459 | .byte 0x66; rex64 | |
5460 | call *__tls_get_addr@GOTPCREL(%rip | |
5461 | which may be converted to | |
5462 | addr32 call __tls_get_addr | |
52bc799a | 5463 | into: |
e2cbcd91 L |
5464 | movq %fs:0, %rax |
5465 | addq foo@gottpoff(%rip), %rax | |
52bc799a | 5466 | For 32bit, change |
e2cbcd91 L |
5467 | leaq foo@tlsgd(%rip), %rdi |
5468 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5469 | or | |
5470 | leaq foo@tlsgd(%rip), %rdi | |
5471 | .byte 0x66; rex64; | |
5472 | call *__tls_get_addr@GOTPCREL(%rip) | |
5473 | which may be converted to | |
5474 | addr32 call __tls_get_addr | |
52bc799a | 5475 | into: |
e2cbcd91 L |
5476 | movl %fs:0, %eax |
5477 | addq foo@gottpoff(%rip), %rax | |
5c98a14e | 5478 | For largepic, change: |
e2cbcd91 L |
5479 | leaq foo@tlsgd(%rip), %rdi |
5480 | movabsq $__tls_get_addr@pltoff, %rax | |
5481 | addq %r15, %rax | |
5482 | call *%rax | |
5c98a14e | 5483 | into: |
e2cbcd91 L |
5484 | movq %fs:0, %rax |
5485 | addq foo@gottpoff(%rax), %rax | |
5486 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 5487 | int largepic = 0; |
e2cbcd91 | 5488 | if (ABI_64_P (output_bfd)) |
5c98a14e | 5489 | { |
e2cbcd91 L |
5490 | if (contents[roff + 5] == 0xb8) |
5491 | { | |
5492 | memcpy (contents + roff - 3, | |
5493 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
5494 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
5495 | largepic = 1; | |
5496 | } | |
5497 | else | |
5498 | memcpy (contents + roff - 4, | |
5499 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
5500 | 16); | |
5c98a14e | 5501 | } |
52bc799a L |
5502 | else |
5503 | memcpy (contents + roff - 3, | |
5504 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
5505 | 15); | |
142411ca | 5506 | |
6de2ae4a L |
5507 | relocation = (htab->elf.sgot->output_section->vma |
5508 | + htab->elf.sgot->output_offset + off | |
142411ca | 5509 | - roff |
5c98a14e | 5510 | - largepic |
142411ca L |
5511 | - input_section->output_section->vma |
5512 | - input_section->output_offset | |
5513 | - 12); | |
5514 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
5515 | contents + roff + 8 + largepic); |
5516 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 5517 | rel++; |
60f2e42e | 5518 | wrel++; |
142411ca L |
5519 | continue; |
5520 | } | |
351f65ca | 5521 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
5522 | { |
5523 | /* GDesc -> IE transition. | |
5524 | It's originally something like: | |
5525 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 5526 | |
142411ca | 5527 | Change it to: |
c9736ba0 | 5528 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 5529 | |
142411ca L |
5530 | /* Now modify the instruction as appropriate. To |
5531 | turn a leaq into a movq in the form we use it, it | |
5532 | suffices to change the second byte from 0x8d to | |
5533 | 0x8b. */ | |
5534 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
5535 | ||
5536 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
5537 | htab->elf.sgot->output_section->vma |
5538 | + htab->elf.sgot->output_offset + off | |
142411ca L |
5539 | - rel->r_offset |
5540 | - input_section->output_section->vma | |
5541 | - input_section->output_offset | |
5542 | - 4, | |
5543 | contents + roff); | |
5544 | continue; | |
5545 | } | |
351f65ca | 5546 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
5547 | { |
5548 | /* GDesc -> IE transition. | |
5549 | It's originally: | |
5550 | call *(%rax) | |
5551 | ||
5552 | Change it to: | |
c9736ba0 | 5553 | xchg %ax, %ax. */ |
142411ca | 5554 | |
142411ca L |
5555 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
5556 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
5557 | continue; | |
5558 | } | |
5559 | else | |
5560 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 5561 | } |
bffbf940 JJ |
5562 | break; |
5563 | ||
5564 | case R_X86_64_TLSLD: | |
351f65ca L |
5565 | if (! elf_x86_64_tls_transition (info, input_bfd, |
5566 | input_section, contents, | |
5567 | symtab_hdr, sym_hashes, | |
bedfd056 L |
5568 | &r_type, GOT_UNKNOWN, rel, |
5569 | relend, h, r_symndx, TRUE)) | |
142411ca | 5570 | return FALSE; |
a3fadc9a | 5571 | |
142411ca L |
5572 | if (r_type != R_X86_64_TLSLD) |
5573 | { | |
bffbf940 | 5574 | /* LD->LE transition: |
e2cbcd91 L |
5575 | leaq foo@tlsld(%rip), %rdi |
5576 | call __tls_get_addr@PLT | |
5577 | For 64bit, we change it into: | |
5578 | .word 0x6666; .byte 0x66; movq %fs:0, %rax | |
5579 | For 32bit, we change it into: | |
5580 | nopl 0x0(%rax); movl %fs:0, %eax | |
5581 | Or | |
5582 | leaq foo@tlsld(%rip), %rdi; | |
5583 | call *__tls_get_addr@GOTPCREL(%rip) | |
5584 | which may be converted to | |
5585 | addr32 call __tls_get_addr | |
52bc799a | 5586 | For 64bit, we change it into: |
e2cbcd91 | 5587 | .word 0x6666; .word 0x6666; movq %fs:0, %rax |
52bc799a | 5588 | For 32bit, we change it into: |
e2cbcd91 | 5589 | nopw 0x0(%rax); movl %fs:0, %eax |
5c98a14e | 5590 | For largepic, change: |
e2cbcd91 L |
5591 | leaq foo@tlsgd(%rip), %rdi |
5592 | movabsq $__tls_get_addr@pltoff, %rax | |
5593 | addq %rbx, %rax | |
5594 | call *%rax | |
5595 | into | |
5596 | data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
5597 | movq %fs:0, %eax */ | |
142411ca L |
5598 | |
5599 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
e2cbcd91 L |
5600 | if (ABI_64_P (output_bfd)) |
5601 | { | |
5602 | if (contents[rel->r_offset + 5] == 0xb8) | |
5603 | memcpy (contents + rel->r_offset - 3, | |
5604 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
5605 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
5606 | else if (contents[rel->r_offset + 4] == 0xff | |
5607 | || contents[rel->r_offset + 4] == 0x67) | |
5608 | memcpy (contents + rel->r_offset - 3, | |
5609 | "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", | |
5610 | 13); | |
5611 | else | |
5612 | memcpy (contents + rel->r_offset - 3, | |
5613 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
5614 | } | |
52bc799a | 5615 | else |
e2cbcd91 L |
5616 | { |
5617 | if (contents[rel->r_offset + 4] == 0xff) | |
5618 | memcpy (contents + rel->r_offset - 3, | |
5619 | "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", | |
5620 | 13); | |
5621 | else | |
5622 | memcpy (contents + rel->r_offset - 3, | |
5623 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
5624 | } | |
5625 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX | |
5626 | and R_X86_64_PLTOFF64. */ | |
bffbf940 | 5627 | rel++; |
60f2e42e | 5628 | wrel++; |
bffbf940 JJ |
5629 | continue; |
5630 | } | |
5631 | ||
6de2ae4a | 5632 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
5633 | abort (); |
5634 | ||
5635 | off = htab->tls_ld_got.offset; | |
5636 | if (off & 1) | |
5637 | off &= ~1; | |
5638 | else | |
5639 | { | |
5640 | Elf_Internal_Rela outrel; | |
bffbf940 | 5641 | |
6de2ae4a | 5642 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
5643 | abort (); |
5644 | ||
6de2ae4a L |
5645 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5646 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
5647 | |
5648 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5649 | htab->elf.sgot->contents + off); |
bffbf940 | 5650 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 5651 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5652 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 5653 | outrel.r_addend = 0; |
351f65ca | 5654 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 5655 | &outrel); |
bffbf940 JJ |
5656 | htab->tls_ld_got.offset |= 1; |
5657 | } | |
6de2ae4a L |
5658 | relocation = htab->elf.sgot->output_section->vma |
5659 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5660 | unresolved_reloc = FALSE; |
bffbf940 JJ |
5661 | break; |
5662 | ||
5663 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
5664 | if (!bfd_link_executable (info) |
5665 | || (input_section->flags & SEC_CODE) == 0) | |
351f65ca | 5666 | relocation -= elf_x86_64_dtpoff_base (info); |
bffbf940 | 5667 | else |
351f65ca | 5668 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5669 | break; |
5670 | ||
5671 | case R_X86_64_TPOFF32: | |
6769d501 | 5672 | case R_X86_64_TPOFF64: |
0e1862bb | 5673 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 5674 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5675 | break; |
5676 | ||
a69ed7f7 L |
5677 | case R_X86_64_DTPOFF64: |
5678 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
5679 | relocation -= elf_x86_64_dtpoff_base (info); | |
5680 | break; | |
5681 | ||
70256ad8 AJ |
5682 | default: |
5683 | break; | |
5684 | } | |
8d88c4ca | 5685 | |
239e1f3a AM |
5686 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
5687 | because such sections are not SEC_ALLOC and thus ld.so will | |
5688 | not process them. */ | |
c434dee6 | 5689 | if (unresolved_reloc |
239e1f3a | 5690 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
5691 | && h->def_dynamic) |
5692 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
5693 | rel->r_offset) != (bfd_vma) -1) | |
a040981f | 5694 | { |
4eca0228 | 5695 | _bfd_error_handler |
695344c0 | 5696 | /* xgettext:c-format */ |
a040981f L |
5697 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
5698 | input_bfd, | |
5699 | input_section, | |
5700 | (long) rel->r_offset, | |
5701 | howto->name, | |
5702 | h->root.root.string); | |
5703 | return FALSE; | |
5704 | } | |
c434dee6 | 5705 | |
cbe950e9 | 5706 | do_relocation: |
8d88c4ca | 5707 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
5708 | contents, rel->r_offset, |
5709 | relocation, rel->r_addend); | |
8d88c4ca | 5710 | |
62d78908 | 5711 | check_relocation_error: |
8d88c4ca | 5712 | if (r != bfd_reloc_ok) |
8da6118f | 5713 | { |
c434dee6 AJ |
5714 | const char *name; |
5715 | ||
5716 | if (h != NULL) | |
5717 | name = h->root.root.string; | |
5718 | else | |
8da6118f | 5719 | { |
c434dee6 AJ |
5720 | name = bfd_elf_string_from_elf_section (input_bfd, |
5721 | symtab_hdr->sh_link, | |
5722 | sym->st_name); | |
5723 | if (name == NULL) | |
b34976b6 | 5724 | return FALSE; |
c434dee6 AJ |
5725 | if (*name == '\0') |
5726 | name = bfd_section_name (input_bfd, sec); | |
5727 | } | |
5728 | ||
5729 | if (r == bfd_reloc_overflow) | |
1a72702b AM |
5730 | (*info->callbacks->reloc_overflow) |
5731 | (info, (h ? &h->root : NULL), name, howto->name, | |
5732 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
c434dee6 AJ |
5733 | else |
5734 | { | |
4eca0228 | 5735 | _bfd_error_handler |
695344c0 | 5736 | /* xgettext:c-format */ |
bb95161d | 5737 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
d003868e | 5738 | input_bfd, input_section, |
c434dee6 | 5739 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 5740 | return FALSE; |
8da6118f KH |
5741 | } |
5742 | } | |
60f2e42e L |
5743 | |
5744 | if (wrel != rel) | |
5745 | *wrel = *rel; | |
5746 | } | |
5747 | ||
5748 | if (wrel != rel) | |
5749 | { | |
5750 | Elf_Internal_Shdr *rel_hdr; | |
5751 | size_t deleted = rel - wrel; | |
5752 | ||
5753 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
5754 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5755 | if (rel_hdr->sh_size == 0) | |
5756 | { | |
5757 | /* It is too late to remove an empty reloc section. Leave | |
5758 | one NONE reloc. | |
5759 | ??? What is wrong with an empty section??? */ | |
5760 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
5761 | deleted -= 1; | |
5762 | } | |
5763 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
5764 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5765 | input_section->reloc_count -= deleted; | |
8d88c4ca | 5766 | } |
70256ad8 | 5767 | |
b34976b6 | 5768 | return TRUE; |
70256ad8 AJ |
5769 | } |
5770 | ||
5771 | /* Finish up dynamic symbol handling. We set the contents of various | |
5772 | dynamic sections here. */ | |
5773 | ||
b34976b6 | 5774 | static bfd_boolean |
351f65ca L |
5775 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
5776 | struct bfd_link_info *info, | |
5777 | struct elf_link_hash_entry *h, | |
aec6b87e | 5778 | Elf_Internal_Sym *sym) |
70256ad8 | 5779 | { |
351f65ca | 5780 | struct elf_x86_64_link_hash_table *htab; |
0ff2b86e L |
5781 | const struct elf_x86_64_backend_data *abed; |
5782 | bfd_boolean use_plt_bnd; | |
dd7e64d4 | 5783 | struct elf_x86_64_link_hash_entry *eh; |
aec6b87e | 5784 | bfd_boolean local_undefweak; |
70256ad8 | 5785 | |
351f65ca | 5786 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
5787 | if (htab == NULL) |
5788 | return FALSE; | |
70256ad8 | 5789 | |
0ff2b86e L |
5790 | /* Use MPX backend data in case of BND relocation. Use .plt_bnd |
5791 | section only if there is .plt section. */ | |
5792 | use_plt_bnd = htab->elf.splt != NULL && htab->plt_bnd != NULL; | |
5793 | abed = (use_plt_bnd | |
5794 | ? &elf_x86_64_bnd_arch_bed | |
5795 | : get_elf_x86_64_backend_data (output_bfd)); | |
5796 | ||
dd7e64d4 L |
5797 | eh = (struct elf_x86_64_link_hash_entry *) h; |
5798 | ||
aec6b87e L |
5799 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
5800 | resolved undefined weak symbols in executable so that their | |
5801 | references have value 0 at run-time. */ | |
e62b9723 L |
5802 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
5803 | eh->has_got_reloc, | |
5804 | eh); | |
aec6b87e | 5805 | |
70256ad8 AJ |
5806 | if (h->plt.offset != (bfd_vma) -1) |
5807 | { | |
70256ad8 | 5808 | bfd_vma plt_index; |
0ff2b86e L |
5809 | bfd_vma got_offset, plt_offset, plt_plt_offset, plt_got_offset; |
5810 | bfd_vma plt_plt_insn_end, plt_got_insn_size; | |
70256ad8 | 5811 | Elf_Internal_Rela rela; |
947216bf | 5812 | bfd_byte *loc; |
0ff2b86e | 5813 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 5814 | const struct elf_backend_data *bed; |
5974eba6 | 5815 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
5816 | |
5817 | /* When building a static executable, use .iplt, .igot.plt and | |
5818 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 5819 | if (htab->elf.splt != NULL) |
cbe950e9 | 5820 | { |
6de2ae4a L |
5821 | plt = htab->elf.splt; |
5822 | gotplt = htab->elf.sgotplt; | |
5823 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
5824 | } |
5825 | else | |
5826 | { | |
6de2ae4a L |
5827 | plt = htab->elf.iplt; |
5828 | gotplt = htab->elf.igotplt; | |
5829 | relplt = htab->elf.irelplt; | |
cbe950e9 | 5830 | } |
70256ad8 AJ |
5831 | |
5832 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 5833 | it up. */ |
cbe950e9 | 5834 | if ((h->dynindx == -1 |
aec6b87e | 5835 | && !local_undefweak |
0e1862bb | 5836 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
5837 | && h->def_regular |
5838 | && h->type == STT_GNU_IFUNC)) | |
5839 | || plt == NULL | |
5840 | || gotplt == NULL | |
5841 | || relplt == NULL) | |
cec7f46a | 5842 | abort (); |
70256ad8 AJ |
5843 | |
5844 | /* Get the index in the procedure linkage table which | |
5845 | corresponds to this symbol. This is the index of this symbol | |
5846 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 5847 | first entry in the procedure linkage table is reserved. |
6bbec505 | 5848 | |
cbe950e9 | 5849 | Get the offset into the .got table of the entry that |
407443a3 | 5850 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
5851 | bytes. The first three are reserved for the dynamic linker. |
5852 | ||
5853 | For static executables, we don't reserve anything. */ | |
5854 | ||
6de2ae4a | 5855 | if (plt == htab->elf.splt) |
cbe950e9 | 5856 | { |
eed180f8 | 5857 | got_offset = h->plt.offset / abed->plt_entry_size - 1; |
e1f98742 | 5858 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
5859 | } |
5860 | else | |
5861 | { | |
eed180f8 | 5862 | got_offset = h->plt.offset / abed->plt_entry_size; |
e1f98742 | 5863 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 5864 | } |
70256ad8 | 5865 | |
0ff2b86e L |
5866 | plt_plt_insn_end = abed->plt_plt_insn_end; |
5867 | plt_plt_offset = abed->plt_plt_offset; | |
5868 | plt_got_insn_size = abed->plt_got_insn_size; | |
5869 | plt_got_offset = abed->plt_got_offset; | |
5870 | if (use_plt_bnd) | |
5871 | { | |
5872 | /* Use the second PLT with BND relocations. */ | |
5873 | const bfd_byte *plt_entry, *plt2_entry; | |
0ff2b86e L |
5874 | |
5875 | if (eh->has_bnd_reloc) | |
5876 | { | |
5877 | plt_entry = elf_x86_64_bnd_plt_entry; | |
5878 | plt2_entry = elf_x86_64_bnd_plt2_entry; | |
5879 | } | |
5880 | else | |
5881 | { | |
5882 | plt_entry = elf_x86_64_legacy_plt_entry; | |
5883 | plt2_entry = elf_x86_64_legacy_plt2_entry; | |
5884 | ||
5885 | /* Subtract 1 since there is no BND prefix. */ | |
5886 | plt_plt_insn_end -= 1; | |
5887 | plt_plt_offset -= 1; | |
5888 | plt_got_insn_size -= 1; | |
5889 | plt_got_offset -= 1; | |
5890 | } | |
5891 | ||
5892 | BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry) | |
5893 | == sizeof (elf_x86_64_legacy_plt_entry)); | |
5894 | ||
5895 | /* Fill in the entry in the procedure linkage table. */ | |
5896 | memcpy (plt->contents + h->plt.offset, | |
5897 | plt_entry, sizeof (elf_x86_64_legacy_plt_entry)); | |
5898 | /* Fill in the entry in the second PLT. */ | |
5899 | memcpy (htab->plt_bnd->contents + eh->plt_bnd.offset, | |
5900 | plt2_entry, sizeof (elf_x86_64_legacy_plt2_entry)); | |
5901 | ||
5902 | resolved_plt = htab->plt_bnd; | |
5903 | plt_offset = eh->plt_bnd.offset; | |
5904 | } | |
5905 | else | |
5906 | { | |
5907 | /* Fill in the entry in the procedure linkage table. */ | |
5908 | memcpy (plt->contents + h->plt.offset, abed->plt_entry, | |
5909 | abed->plt_entry_size); | |
5910 | ||
5911 | resolved_plt = plt; | |
5912 | plt_offset = h->plt.offset; | |
5913 | } | |
eed180f8 RM |
5914 | |
5915 | /* Insert the relocation positions of the plt section. */ | |
5916 | ||
5917 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
5918 | subtracting the size of that instruction. */ | |
ab7fede8 L |
5919 | plt_got_pcrel_offset = (gotplt->output_section->vma |
5920 | + gotplt->output_offset | |
5921 | + got_offset | |
5922 | - resolved_plt->output_section->vma | |
5923 | - resolved_plt->output_offset | |
5924 | - plt_offset | |
5925 | - plt_got_insn_size); | |
5926 | ||
5927 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 5928 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
695344c0 | 5929 | /* xgettext:c-format */ |
ab7fede8 L |
5930 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"), |
5931 | output_bfd, h->root.root.string); | |
5932 | ||
5933 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
0ff2b86e | 5934 | resolved_plt->contents + plt_offset + plt_got_offset); |
cbe950e9 | 5935 | |
653165cc | 5936 | /* Fill in the entry in the global offset table, initially this |
aec6b87e L |
5937 | points to the second part of the PLT entry. Leave the entry |
5938 | as zero for undefined weak symbol in PIE. No PLT relocation | |
5939 | against undefined weak symbol in PIE. */ | |
5940 | if (!local_undefweak) | |
cbe950e9 | 5941 | { |
aec6b87e L |
5942 | bfd_put_64 (output_bfd, (plt->output_section->vma |
5943 | + plt->output_offset | |
5944 | + h->plt.offset | |
5945 | + abed->plt_lazy_offset), | |
5946 | gotplt->contents + got_offset); | |
5947 | ||
5948 | /* Fill in the entry in the .rela.plt section. */ | |
5949 | rela.r_offset = (gotplt->output_section->vma | |
5950 | + gotplt->output_offset | |
5951 | + got_offset); | |
5952 | if (h->dynindx == -1 | |
5953 | || ((bfd_link_executable (info) | |
5954 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
5955 | && h->def_regular | |
5956 | && h->type == STT_GNU_IFUNC)) | |
5957 | { | |
5958 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
5959 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
5960 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); | |
5961 | rela.r_addend = (h->root.u.def.value | |
5962 | + h->root.u.def.section->output_section->vma | |
5963 | + h->root.u.def.section->output_offset); | |
5964 | /* R_X86_64_IRELATIVE comes last. */ | |
5965 | plt_index = htab->next_irelative_index--; | |
5966 | } | |
5967 | else | |
5968 | { | |
5969 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); | |
5970 | rela.r_addend = 0; | |
5971 | plt_index = htab->next_jump_slot_index++; | |
5972 | } | |
e1f98742 | 5973 | |
aec6b87e L |
5974 | /* Don't fill PLT entry for static executables. */ |
5975 | if (plt == htab->elf.splt) | |
5976 | { | |
5977 | bfd_vma plt0_offset = h->plt.offset + plt_plt_insn_end; | |
5978 | ||
5979 | /* Put relocation index. */ | |
5980 | bfd_put_32 (output_bfd, plt_index, | |
5981 | (plt->contents + h->plt.offset | |
5982 | + abed->plt_reloc_offset)); | |
5983 | ||
5984 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
5985 | check relocation index for overflow since branch displacement | |
5986 | will overflow first. */ | |
5987 | if (plt0_offset > 0x80000000) | |
695344c0 | 5988 | /* xgettext:c-format */ |
aec6b87e L |
5989 | info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"), |
5990 | output_bfd, h->root.root.string); | |
5991 | bfd_put_32 (output_bfd, - plt0_offset, | |
5992 | plt->contents + h->plt.offset + plt_plt_offset); | |
5993 | } | |
351f65ca | 5994 | |
aec6b87e L |
5995 | bed = get_elf_backend_data (output_bfd); |
5996 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
5997 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
5998 | } | |
dd7e64d4 L |
5999 | } |
6000 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
6001 | { | |
6002 | bfd_vma got_offset, plt_offset, plt_got_offset, plt_got_insn_size; | |
6003 | asection *plt, *got; | |
6004 | bfd_boolean got_after_plt; | |
6005 | int32_t got_pcrel_offset; | |
6006 | const bfd_byte *got_plt_entry; | |
6007 | ||
6008 | /* Set the entry in the GOT procedure linkage table. */ | |
6009 | plt = htab->plt_got; | |
6010 | got = htab->elf.sgot; | |
6011 | got_offset = h->got.offset; | |
6012 | ||
6013 | if (got_offset == (bfd_vma) -1 | |
6014 | || h->type == STT_GNU_IFUNC | |
6015 | || plt == NULL | |
6016 | || got == NULL) | |
6017 | abort (); | |
70256ad8 | 6018 | |
dd7e64d4 L |
6019 | /* Use the second PLT entry template for the GOT PLT since they |
6020 | are the identical. */ | |
6021 | plt_got_insn_size = elf_x86_64_bnd_arch_bed.plt_got_insn_size; | |
6022 | plt_got_offset = elf_x86_64_bnd_arch_bed.plt_got_offset; | |
6023 | if (eh->has_bnd_reloc) | |
6024 | got_plt_entry = elf_x86_64_bnd_plt2_entry; | |
6025 | else | |
70256ad8 | 6026 | { |
dd7e64d4 L |
6027 | got_plt_entry = elf_x86_64_legacy_plt2_entry; |
6028 | ||
6029 | /* Subtract 1 since there is no BND prefix. */ | |
6030 | plt_got_insn_size -= 1; | |
6031 | plt_got_offset -= 1; | |
70256ad8 | 6032 | } |
dd7e64d4 L |
6033 | |
6034 | /* Fill in the entry in the GOT procedure linkage table. */ | |
6035 | plt_offset = eh->plt_got.offset; | |
6036 | memcpy (plt->contents + plt_offset, | |
6037 | got_plt_entry, sizeof (elf_x86_64_legacy_plt2_entry)); | |
6038 | ||
6039 | /* Put offset the PC-relative instruction referring to the GOT | |
6040 | entry, subtracting the size of that instruction. */ | |
6041 | got_pcrel_offset = (got->output_section->vma | |
6042 | + got->output_offset | |
6043 | + got_offset | |
6044 | - plt->output_section->vma | |
6045 | - plt->output_offset | |
6046 | - plt_offset | |
6047 | - plt_got_insn_size); | |
6048 | ||
6049 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
6050 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
6051 | if ((got_after_plt && got_pcrel_offset < 0) | |
6052 | || (!got_after_plt && got_pcrel_offset > 0)) | |
695344c0 | 6053 | /* xgettext:c-format */ |
dd7e64d4 L |
6054 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"), |
6055 | output_bfd, h->root.root.string); | |
6056 | ||
6057 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
6058 | plt->contents + plt_offset + plt_got_offset); | |
6059 | } | |
6060 | ||
aec6b87e L |
6061 | if (!local_undefweak |
6062 | && !h->def_regular | |
dd7e64d4 L |
6063 | && (h->plt.offset != (bfd_vma) -1 |
6064 | || eh->plt_got.offset != (bfd_vma) -1)) | |
6065 | { | |
6066 | /* Mark the symbol as undefined, rather than as defined in | |
6067 | the .plt section. Leave the value if there were any | |
6068 | relocations where pointer equality matters (this is a clue | |
6069 | for the dynamic linker, to make function pointer | |
6070 | comparisons work between an application and shared | |
6071 | library), otherwise set it to zero. If a function is only | |
6072 | called from a binary, there is no need to slow down | |
6073 | shared libraries because of that. */ | |
6074 | sym->st_shndx = SHN_UNDEF; | |
6075 | if (!h->pointer_equality_needed) | |
6076 | sym->st_value = 0; | |
70256ad8 AJ |
6077 | } |
6078 | ||
aec6b87e L |
6079 | /* Don't generate dynamic GOT relocation against undefined weak |
6080 | symbol in executable. */ | |
bffbf940 | 6081 | if (h->got.offset != (bfd_vma) -1 |
351f65ca | 6082 | && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type) |
aec6b87e L |
6083 | && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE |
6084 | && !local_undefweak) | |
053579d7 | 6085 | { |
053579d7 | 6086 | Elf_Internal_Rela rela; |
233cc9c1 | 6087 | asection *relgot = htab->elf.srelgot; |
053579d7 AJ |
6088 | |
6089 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 6090 | up. */ |
6de2ae4a | 6091 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 6092 | abort (); |
053579d7 | 6093 | |
6de2ae4a L |
6094 | rela.r_offset = (htab->elf.sgot->output_section->vma |
6095 | + htab->elf.sgot->output_offset | |
dc810e39 | 6096 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
6097 | |
6098 | /* If this is a static link, or it is a -Bsymbolic link and the | |
6099 | symbol is defined locally or was forced to be local because | |
6100 | of a version file, we just want to emit a RELATIVE reloc. | |
6101 | The entry in the global offset table will already have been | |
6102 | initialized in the relocate_section function. */ | |
710ab287 | 6103 | if (h->def_regular |
0018b0a3 L |
6104 | && h->type == STT_GNU_IFUNC) |
6105 | { | |
233cc9c1 L |
6106 | if (h->plt.offset == (bfd_vma) -1) |
6107 | { | |
6108 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
6109 | if (htab->elf.splt == NULL) | |
6110 | { | |
6111 | /* use .rel[a].iplt section to store .got relocations | |
6112 | in static executable. */ | |
6113 | relgot = htab->elf.irelplt; | |
6114 | } | |
6115 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
6116 | { | |
6117 | rela.r_info = htab->r_info (0, | |
6118 | R_X86_64_IRELATIVE); | |
6119 | rela.r_addend = (h->root.u.def.value | |
6120 | + h->root.u.def.section->output_section->vma | |
6121 | + h->root.u.def.section->output_offset); | |
6122 | } | |
6123 | else | |
6124 | goto do_glob_dat; | |
6125 | } | |
6126 | else if (bfd_link_pic (info)) | |
710ab287 L |
6127 | { |
6128 | /* Generate R_X86_64_GLOB_DAT. */ | |
6129 | goto do_glob_dat; | |
6130 | } | |
6131 | else | |
6132 | { | |
90d60710 L |
6133 | asection *plt; |
6134 | ||
710ab287 L |
6135 | if (!h->pointer_equality_needed) |
6136 | abort (); | |
6137 | ||
6138 | /* For non-shared object, we can't use .got.plt, which | |
6139 | contains the real function addres if we need pointer | |
6140 | equality. We load the GOT entry with the PLT entry. */ | |
90d60710 | 6141 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
6142 | bfd_put_64 (output_bfd, (plt->output_section->vma |
6143 | + plt->output_offset | |
6144 | + h->plt.offset), | |
6de2ae4a | 6145 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
6146 | return TRUE; |
6147 | } | |
0018b0a3 | 6148 | } |
0e1862bb | 6149 | else if (bfd_link_pic (info) |
0018b0a3 | 6150 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
053579d7 | 6151 | { |
41bed6dd L |
6152 | if (!h->def_regular) |
6153 | return FALSE; | |
cc78d0af | 6154 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 6155 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
6156 | rela.r_addend = (h->root.u.def.value |
6157 | + h->root.u.def.section->output_section->vma | |
6158 | + h->root.u.def.section->output_offset); | |
6159 | } | |
6160 | else | |
6161 | { | |
6162 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 6163 | do_glob_dat: |
c434dee6 | 6164 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 6165 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 6166 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
6167 | rela.r_addend = 0; |
6168 | } | |
6169 | ||
233cc9c1 | 6170 | elf_append_rela (output_bfd, relgot, &rela); |
053579d7 AJ |
6171 | } |
6172 | ||
f5385ebf | 6173 | if (h->needs_copy) |
70256ad8 | 6174 | { |
70256ad8 | 6175 | Elf_Internal_Rela rela; |
5474d94f | 6176 | asection *s; |
70256ad8 AJ |
6177 | |
6178 | /* This symbol needs a copy reloc. Set it up. */ | |
6179 | ||
c434dee6 AJ |
6180 | if (h->dynindx == -1 |
6181 | || (h->root.type != bfd_link_hash_defined | |
6182 | && h->root.type != bfd_link_hash_defweak) | |
5474d94f AM |
6183 | || htab->elf.srelbss == NULL |
6184 | || htab->elf.sreldynrelro == NULL) | |
c434dee6 | 6185 | abort (); |
70256ad8 AJ |
6186 | |
6187 | rela.r_offset = (h->root.u.def.value | |
6188 | + h->root.u.def.section->output_section->vma | |
6189 | + h->root.u.def.section->output_offset); | |
351f65ca | 6190 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 6191 | rela.r_addend = 0; |
afbf7e8e | 6192 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
6193 | s = htab->elf.sreldynrelro; |
6194 | else | |
6195 | s = htab->elf.srelbss; | |
6196 | elf_append_rela (output_bfd, s, &rela); | |
70256ad8 AJ |
6197 | } |
6198 | ||
b34976b6 | 6199 | return TRUE; |
70256ad8 AJ |
6200 | } |
6201 | ||
c25bc9fc L |
6202 | /* Finish up local dynamic symbol handling. We set the contents of |
6203 | various dynamic sections here. */ | |
6204 | ||
6205 | static bfd_boolean | |
351f65ca | 6206 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
6207 | { |
6208 | struct elf_link_hash_entry *h | |
6209 | = (struct elf_link_hash_entry *) *slot; | |
6210 | struct bfd_link_info *info | |
eed180f8 | 6211 | = (struct bfd_link_info *) inf; |
c25bc9fc | 6212 | |
351f65ca | 6213 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
c25bc9fc L |
6214 | info, h, NULL); |
6215 | } | |
6216 | ||
aec6b87e L |
6217 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
6218 | here since undefined weak symbol may not be dynamic and may not be | |
6219 | called for elf_x86_64_finish_dynamic_symbol. */ | |
6220 | ||
6221 | static bfd_boolean | |
6222 | elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
6223 | void *inf) | |
6224 | { | |
6225 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
6226 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
6227 | ||
6228 | if (h->root.type != bfd_link_hash_undefweak | |
6229 | || h->dynindx != -1) | |
6230 | return TRUE; | |
6231 | ||
6232 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, | |
6233 | info, h, NULL); | |
6234 | } | |
6235 | ||
c434dee6 AJ |
6236 | /* Used to decide how to sort relocs in an optimal manner for the |
6237 | dynamic linker, before writing them out. */ | |
6238 | ||
6239 | static enum elf_reloc_type_class | |
cae1fbbb | 6240 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
6241 | const asection *rel_sec ATTRIBUTE_UNUSED, |
6242 | const Elf_Internal_Rela *rela) | |
c434dee6 | 6243 | { |
cae1fbbb L |
6244 | bfd *abfd = info->output_bfd; |
6245 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
6246 | struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info); | |
cae1fbbb | 6247 | |
d9e3b590 L |
6248 | if (htab->elf.dynsym != NULL |
6249 | && htab->elf.dynsym->contents != NULL) | |
6250 | { | |
6251 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
6252 | dynamic symbols. */ | |
6253 | unsigned long r_symndx = htab->r_sym (rela->r_info); | |
897463b1 L |
6254 | if (r_symndx != STN_UNDEF) |
6255 | { | |
6256 | Elf_Internal_Sym sym; | |
6257 | if (!bed->s->swap_symbol_in (abfd, | |
6258 | (htab->elf.dynsym->contents | |
6259 | + r_symndx * bed->s->sizeof_sym), | |
6260 | 0, &sym)) | |
6261 | abort (); | |
d9e3b590 | 6262 | |
897463b1 L |
6263 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
6264 | return reloc_class_ifunc; | |
6265 | } | |
d9e3b590 | 6266 | } |
cae1fbbb | 6267 | |
351f65ca | 6268 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 | 6269 | { |
c428ce9d L |
6270 | case R_X86_64_IRELATIVE: |
6271 | return reloc_class_ifunc; | |
c434dee6 | 6272 | case R_X86_64_RELATIVE: |
1da80baa | 6273 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
6274 | return reloc_class_relative; |
6275 | case R_X86_64_JUMP_SLOT: | |
6276 | return reloc_class_plt; | |
6277 | case R_X86_64_COPY: | |
6278 | return reloc_class_copy; | |
6279 | default: | |
6280 | return reloc_class_normal; | |
6281 | } | |
6282 | } | |
6283 | ||
70256ad8 AJ |
6284 | /* Finish up the dynamic sections. */ |
6285 | ||
b34976b6 | 6286 | static bfd_boolean |
351f65ca L |
6287 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
6288 | struct bfd_link_info *info) | |
70256ad8 | 6289 | { |
351f65ca | 6290 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
6291 | bfd *dynobj; |
6292 | asection *sdyn; | |
0ff2b86e | 6293 | const struct elf_x86_64_backend_data *abed; |
70256ad8 | 6294 | |
351f65ca | 6295 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
6296 | if (htab == NULL) |
6297 | return FALSE; | |
6298 | ||
0ff2b86e L |
6299 | /* Use MPX backend data in case of BND relocation. Use .plt_bnd |
6300 | section only if there is .plt section. */ | |
6301 | abed = (htab->elf.splt != NULL && htab->plt_bnd != NULL | |
6302 | ? &elf_x86_64_bnd_arch_bed | |
6303 | : get_elf_x86_64_backend_data (output_bfd)); | |
6304 | ||
c434dee6 | 6305 | dynobj = htab->elf.dynobj; |
3d4d4302 | 6306 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
70256ad8 | 6307 | |
c434dee6 | 6308 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 6309 | { |
82e96e07 L |
6310 | bfd_byte *dyncon, *dynconend; |
6311 | const struct elf_backend_data *bed; | |
6312 | bfd_size_type sizeof_dyn; | |
70256ad8 | 6313 | |
6de2ae4a | 6314 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 6315 | abort (); |
70256ad8 | 6316 | |
82e96e07 L |
6317 | bed = get_elf_backend_data (dynobj); |
6318 | sizeof_dyn = bed->s->sizeof_dyn; | |
6319 | dyncon = sdyn->contents; | |
6320 | dynconend = sdyn->contents + sdyn->size; | |
6321 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
6322 | { |
6323 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
6324 | asection *s; |
6325 | ||
82e96e07 | 6326 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
6327 | |
6328 | switch (dyn.d_tag) | |
6329 | { | |
6330 | default: | |
053579d7 | 6331 | continue; |
70256ad8 AJ |
6332 | |
6333 | case DT_PLTGOT: | |
6de2ae4a | 6334 | s = htab->elf.sgotplt; |
8c37241b | 6335 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 6336 | break; |
70256ad8 AJ |
6337 | |
6338 | case DT_JMPREL: | |
6de2ae4a | 6339 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 6340 | break; |
70256ad8 | 6341 | |
c434dee6 | 6342 | case DT_PLTRELSZ: |
6de2ae4a | 6343 | s = htab->elf.srelplt->output_section; |
eea6121a | 6344 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
6345 | break; |
6346 | ||
67a4f2b7 | 6347 | case DT_TLSDESC_PLT: |
6de2ae4a | 6348 | s = htab->elf.splt; |
67a4f2b7 AO |
6349 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
6350 | + htab->tlsdesc_plt; | |
6351 | break; | |
6352 | ||
6353 | case DT_TLSDESC_GOT: | |
6de2ae4a | 6354 | s = htab->elf.sgot; |
67a4f2b7 AO |
6355 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
6356 | + htab->tlsdesc_got; | |
6357 | break; | |
70256ad8 | 6358 | } |
c434dee6 | 6359 | |
82e96e07 | 6360 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
6361 | } |
6362 | ||
c434dee6 | 6363 | /* Fill in the special first entry in the procedure linkage table. */ |
6de2ae4a | 6364 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 6365 | { |
653165cc | 6366 | /* Fill in the first entry in the procedure linkage table. */ |
eed180f8 RM |
6367 | memcpy (htab->elf.splt->contents, |
6368 | abed->plt0_entry, abed->plt_entry_size); | |
653165cc AJ |
6369 | /* Add offset for pushq GOT+8(%rip), since the instruction |
6370 | uses 6 bytes subtract this value. */ | |
6371 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
6372 | (htab->elf.sgotplt->output_section->vma |
6373 | + htab->elf.sgotplt->output_offset | |
653165cc | 6374 | + 8 |
6de2ae4a L |
6375 | - htab->elf.splt->output_section->vma |
6376 | - htab->elf.splt->output_offset | |
653165cc | 6377 | - 6), |
eed180f8 RM |
6378 | htab->elf.splt->contents + abed->plt0_got1_offset); |
6379 | /* Add offset for the PC-relative instruction accessing GOT+16, | |
6380 | subtracting the offset to the end of that instruction. */ | |
653165cc | 6381 | bfd_put_32 (output_bfd, |
6de2ae4a L |
6382 | (htab->elf.sgotplt->output_section->vma |
6383 | + htab->elf.sgotplt->output_offset | |
653165cc | 6384 | + 16 |
6de2ae4a L |
6385 | - htab->elf.splt->output_section->vma |
6386 | - htab->elf.splt->output_offset | |
eed180f8 RM |
6387 | - abed->plt0_got2_insn_end), |
6388 | htab->elf.splt->contents + abed->plt0_got2_offset); | |
653165cc | 6389 | |
eed180f8 RM |
6390 | elf_section_data (htab->elf.splt->output_section) |
6391 | ->this_hdr.sh_entsize = abed->plt_entry_size; | |
67a4f2b7 AO |
6392 | |
6393 | if (htab->tlsdesc_plt) | |
6394 | { | |
6395 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6de2ae4a | 6396 | htab->elf.sgot->contents + htab->tlsdesc_got); |
67a4f2b7 | 6397 | |
6de2ae4a | 6398 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, |
eed180f8 | 6399 | abed->plt0_entry, abed->plt_entry_size); |
67a4f2b7 AO |
6400 | |
6401 | /* Add offset for pushq GOT+8(%rip), since the | |
6402 | instruction uses 6 bytes subtract this value. */ | |
6403 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
6404 | (htab->elf.sgotplt->output_section->vma |
6405 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 6406 | + 8 |
6de2ae4a L |
6407 | - htab->elf.splt->output_section->vma |
6408 | - htab->elf.splt->output_offset | |
67a4f2b7 AO |
6409 | - htab->tlsdesc_plt |
6410 | - 6), | |
eed180f8 RM |
6411 | htab->elf.splt->contents |
6412 | + htab->tlsdesc_plt + abed->plt0_got1_offset); | |
6413 | /* Add offset for the PC-relative instruction accessing GOT+TDG, | |
6414 | where TGD stands for htab->tlsdesc_got, subtracting the offset | |
6415 | to the end of that instruction. */ | |
67a4f2b7 | 6416 | bfd_put_32 (output_bfd, |
6de2ae4a L |
6417 | (htab->elf.sgot->output_section->vma |
6418 | + htab->elf.sgot->output_offset | |
67a4f2b7 | 6419 | + htab->tlsdesc_got |
6de2ae4a L |
6420 | - htab->elf.splt->output_section->vma |
6421 | - htab->elf.splt->output_offset | |
67a4f2b7 | 6422 | - htab->tlsdesc_plt |
eed180f8 RM |
6423 | - abed->plt0_got2_insn_end), |
6424 | htab->elf.splt->contents | |
6425 | + htab->tlsdesc_plt + abed->plt0_got2_offset); | |
67a4f2b7 | 6426 | } |
70256ad8 | 6427 | } |
70256ad8 AJ |
6428 | } |
6429 | ||
0ff2b86e L |
6430 | if (htab->plt_bnd != NULL) |
6431 | elf_section_data (htab->plt_bnd->output_section) | |
6432 | ->this_hdr.sh_entsize = sizeof (elf_x86_64_bnd_plt2_entry); | |
6433 | ||
6de2ae4a | 6434 | if (htab->elf.sgotplt) |
70256ad8 | 6435 | { |
56d4289c L |
6436 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
6437 | { | |
4eca0228 | 6438 | _bfd_error_handler |
56d4289c L |
6439 | (_("discarded output section: `%A'"), htab->elf.sgotplt); |
6440 | return FALSE; | |
6441 | } | |
6442 | ||
c434dee6 | 6443 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 6444 | if (htab->elf.sgotplt->size > 0) |
c434dee6 AJ |
6445 | { |
6446 | /* Set the first entry in the global offset table to the address of | |
6447 | the dynamic section. */ | |
6448 | if (sdyn == NULL) | |
6de2ae4a | 6449 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); |
c434dee6 AJ |
6450 | else |
6451 | bfd_put_64 (output_bfd, | |
6452 | sdyn->output_section->vma + sdyn->output_offset, | |
6de2ae4a | 6453 | htab->elf.sgotplt->contents); |
c434dee6 | 6454 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
6de2ae4a L |
6455 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); |
6456 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
c434dee6 | 6457 | } |
70256ad8 | 6458 | |
6de2ae4a | 6459 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = |
c434dee6 AJ |
6460 | GOT_ENTRY_SIZE; |
6461 | } | |
70256ad8 | 6462 | |
e41b3a13 | 6463 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
6464 | if (htab->plt_eh_frame != NULL |
6465 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
6466 | { |
6467 | if (htab->elf.splt != NULL | |
6468 | && htab->elf.splt->size != 0 | |
6469 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
6470 | && htab->elf.splt->output_section != NULL | |
6471 | && htab->plt_eh_frame->output_section != NULL) | |
6472 | { | |
6473 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
6474 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
6475 | + htab->plt_eh_frame->output_offset | |
6476 | + PLT_FDE_START_OFFSET; | |
6477 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
6478 | htab->plt_eh_frame->contents | |
6479 | + PLT_FDE_START_OFFSET); | |
6480 | } | |
dbaa2011 | 6481 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
6482 | { |
6483 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
6484 | htab->plt_eh_frame, | |
6485 | htab->plt_eh_frame->contents)) | |
6486 | return FALSE; | |
6487 | } | |
6488 | } | |
6489 | ||
fff53dae L |
6490 | /* Adjust .eh_frame for .plt.got section. */ |
6491 | if (htab->plt_got_eh_frame != NULL | |
6492 | && htab->plt_got_eh_frame->contents != NULL) | |
6493 | { | |
6494 | if (htab->plt_got != NULL | |
6495 | && htab->plt_got->size != 0 | |
6496 | && (htab->plt_got->flags & SEC_EXCLUDE) == 0 | |
6497 | && htab->plt_got->output_section != NULL | |
6498 | && htab->plt_got_eh_frame->output_section != NULL) | |
6499 | { | |
6500 | bfd_vma plt_start = htab->plt_got->output_section->vma; | |
6501 | bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma | |
6502 | + htab->plt_got_eh_frame->output_offset | |
6503 | + PLT_FDE_START_OFFSET; | |
6504 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
6505 | htab->plt_got_eh_frame->contents | |
6506 | + PLT_FDE_START_OFFSET); | |
6507 | } | |
6508 | if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
6509 | { | |
6510 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
6511 | htab->plt_got_eh_frame, | |
6512 | htab->plt_got_eh_frame->contents)) | |
6513 | return FALSE; | |
6514 | } | |
6515 | } | |
6516 | ||
8361ed4d L |
6517 | /* Adjust .eh_frame for .plt.bnd section. */ |
6518 | if (htab->plt_bnd_eh_frame != NULL | |
6519 | && htab->plt_bnd_eh_frame->contents != NULL) | |
6520 | { | |
6521 | if (htab->plt_bnd != NULL | |
6522 | && htab->plt_bnd->size != 0 | |
6523 | && (htab->plt_bnd->flags & SEC_EXCLUDE) == 0 | |
6524 | && htab->plt_bnd->output_section != NULL | |
6525 | && htab->plt_bnd_eh_frame->output_section != NULL) | |
6526 | { | |
6527 | bfd_vma plt_start = htab->plt_bnd->output_section->vma; | |
6528 | bfd_vma eh_frame_start = htab->plt_bnd_eh_frame->output_section->vma | |
6529 | + htab->plt_bnd_eh_frame->output_offset | |
6530 | + PLT_FDE_START_OFFSET; | |
6531 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
6532 | htab->plt_bnd_eh_frame->contents | |
6533 | + PLT_FDE_START_OFFSET); | |
6534 | } | |
6535 | if (htab->plt_bnd_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
6536 | { | |
6537 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
6538 | htab->plt_bnd_eh_frame, | |
6539 | htab->plt_bnd_eh_frame->contents)) | |
6540 | return FALSE; | |
6541 | } | |
6542 | } | |
6543 | ||
6de2ae4a L |
6544 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
6545 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
6546 | = GOT_ENTRY_SIZE; |
6547 | ||
aec6b87e L |
6548 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
6549 | if (bfd_link_pie (info)) | |
6550 | bfd_hash_traverse (&info->hash->table, | |
6551 | elf_x86_64_pie_finish_undefweak_symbol, | |
6552 | info); | |
6553 | ||
b34976b6 | 6554 | return TRUE; |
8d88c4ca NC |
6555 | } |
6556 | ||
233cc9c1 L |
6557 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
6558 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
6559 | It has to be done before elf_link_sort_relocs is called so that | |
6560 | dynamic relocations are properly sorted. */ | |
6561 | ||
6562 | static bfd_boolean | |
6563 | elf_x86_64_output_arch_local_syms | |
6564 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
6565 | struct bfd_link_info *info, | |
6566 | void *flaginfo ATTRIBUTE_UNUSED, | |
6567 | int (*func) (void *, const char *, | |
6568 | Elf_Internal_Sym *, | |
6569 | asection *, | |
6570 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
6571 | { | |
6572 | struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info); | |
6573 | if (htab == NULL) | |
6574 | return FALSE; | |
6575 | ||
6576 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
6577 | htab_traverse (htab->loc_hash_table, | |
6578 | elf_x86_64_finish_local_dynamic_symbol, | |
6579 | info); | |
6580 | ||
6581 | return TRUE; | |
6582 | } | |
6583 | ||
3972882e | 6584 | /* Return an array of PLT entry symbol values. */ |
4c45e5c9 | 6585 | |
3972882e L |
6586 | static bfd_vma * |
6587 | elf_x86_64_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt, | |
6588 | asection *relplt) | |
4c45e5c9 | 6589 | { |
3972882e L |
6590 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
6591 | arelent *p; | |
6592 | long count, i; | |
6593 | bfd_vma *plt_sym_val; | |
144bed8d | 6594 | bfd_vma plt_offset; |
3972882e L |
6595 | bfd_byte *plt_contents; |
6596 | const struct elf_x86_64_backend_data *bed; | |
6597 | Elf_Internal_Shdr *hdr; | |
6598 | asection *plt_bnd; | |
144bed8d | 6599 | |
3972882e L |
6600 | /* Get the .plt section contents. PLT passed down may point to the |
6601 | .plt.bnd section. Make sure that PLT always points to the .plt | |
6602 | section. */ | |
6603 | plt_bnd = bfd_get_section_by_name (abfd, ".plt.bnd"); | |
6604 | if (plt_bnd) | |
6605 | { | |
6606 | if (plt != plt_bnd) | |
6607 | abort (); | |
6608 | plt = bfd_get_section_by_name (abfd, ".plt"); | |
6609 | if (plt == NULL) | |
6610 | abort (); | |
6611 | bed = &elf_x86_64_bnd_arch_bed; | |
6612 | } | |
6613 | else | |
6614 | bed = get_elf_x86_64_backend_data (abfd); | |
cca5b8b6 | 6615 | |
3972882e L |
6616 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); |
6617 | if (plt_contents == NULL) | |
6618 | return NULL; | |
6619 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
6620 | plt_contents, 0, plt->size)) | |
144bed8d | 6621 | { |
3972882e L |
6622 | bad_return: |
6623 | free (plt_contents); | |
6624 | return NULL; | |
144bed8d L |
6625 | } |
6626 | ||
3972882e L |
6627 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
6628 | if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) | |
6629 | goto bad_return; | |
144bed8d | 6630 | |
3972882e L |
6631 | hdr = &elf_section_data (relplt)->this_hdr; |
6632 | count = relplt->size / hdr->sh_entsize; | |
144bed8d | 6633 | |
3972882e L |
6634 | plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count); |
6635 | if (plt_sym_val == NULL) | |
6636 | goto bad_return; | |
cca5b8b6 | 6637 | |
35181b3e | 6638 | for (i = 0; i < count; i++) |
3972882e | 6639 | plt_sym_val[i] = -1; |
cca5b8b6 | 6640 | |
3972882e L |
6641 | plt_offset = bed->plt_entry_size; |
6642 | p = relplt->relocation; | |
6643 | for (i = 0; i < count; i++, p++) | |
144bed8d | 6644 | { |
3972882e | 6645 | long reloc_index; |
144bed8d | 6646 | |
6f25f223 | 6647 | /* Skip unknown relocation. */ |
533d0af0 | 6648 | if (p->howto == NULL) |
6f25f223 | 6649 | continue; |
533d0af0 | 6650 | |
3972882e L |
6651 | if (p->howto->type != R_X86_64_JUMP_SLOT |
6652 | && p->howto->type != R_X86_64_IRELATIVE) | |
6653 | continue; | |
144bed8d | 6654 | |
3972882e L |
6655 | reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset |
6656 | + bed->plt_reloc_offset)); | |
ec1f73bb | 6657 | if (reloc_index < count) |
144bed8d | 6658 | { |
ec1f73bb AM |
6659 | if (plt_bnd) |
6660 | { | |
6661 | /* This is the index in .plt section. */ | |
6662 | long plt_index = plt_offset / bed->plt_entry_size; | |
6663 | /* Store VMA + the offset in .plt.bnd section. */ | |
6664 | plt_sym_val[reloc_index] = | |
6665 | (plt_bnd->vma | |
6666 | + (plt_index - 1) * sizeof (elf_x86_64_legacy_plt2_entry)); | |
6667 | } | |
6668 | else | |
6669 | plt_sym_val[reloc_index] = plt->vma + plt_offset; | |
144bed8d L |
6670 | } |
6671 | plt_offset += bed->plt_entry_size; | |
fca6ae69 L |
6672 | |
6673 | /* PR binutils/18437: Skip extra relocations in the .rela.plt | |
6674 | section. */ | |
6675 | if (plt_offset >= plt->size) | |
6676 | break; | |
144bed8d L |
6677 | } |
6678 | ||
3972882e L |
6679 | free (plt_contents); |
6680 | ||
6681 | return plt_sym_val; | |
4c45e5c9 | 6682 | } |
8df9fc9d | 6683 | |
0ff2b86e L |
6684 | /* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section |
6685 | support. */ | |
6686 | ||
6687 | static long | |
6688 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
6689 | long symcount, | |
6690 | asymbol **syms, | |
6691 | long dynsymcount, | |
6692 | asymbol **dynsyms, | |
6693 | asymbol **ret) | |
6694 | { | |
3972882e L |
6695 | /* Pass the .plt.bnd section to _bfd_elf_ifunc_get_synthetic_symtab |
6696 | as PLT if it exists. */ | |
6697 | asection *plt = bfd_get_section_by_name (abfd, ".plt.bnd"); | |
0ff2b86e | 6698 | if (plt == NULL) |
3972882e L |
6699 | plt = bfd_get_section_by_name (abfd, ".plt"); |
6700 | return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms, | |
6701 | dynsymcount, dynsyms, ret, | |
6702 | plt, | |
6703 | elf_x86_64_get_plt_sym_val); | |
0ff2b86e L |
6704 | } |
6705 | ||
d2b2c203 DJ |
6706 | /* Handle an x86-64 specific section when reading an object file. This |
6707 | is called when elfcode.h finds a section with an unknown type. */ | |
6708 | ||
6709 | static bfd_boolean | |
0c723101 L |
6710 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
6711 | const char *name, int shindex) | |
d2b2c203 DJ |
6712 | { |
6713 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
6714 | return FALSE; | |
6715 | ||
6dc132d9 | 6716 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
6717 | return FALSE; |
6718 | ||
6719 | return TRUE; | |
6720 | } | |
6721 | ||
3b22753a L |
6722 | /* Hook called by the linker routine which adds symbols from an object |
6723 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
6724 | of .bss. */ | |
6725 | ||
6726 | static bfd_boolean | |
351f65ca | 6727 | elf_x86_64_add_symbol_hook (bfd *abfd, |
a43942db | 6728 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
351f65ca L |
6729 | Elf_Internal_Sym *sym, |
6730 | const char **namep ATTRIBUTE_UNUSED, | |
6731 | flagword *flagsp ATTRIBUTE_UNUSED, | |
6732 | asection **secp, | |
6733 | bfd_vma *valp) | |
3b22753a L |
6734 | { |
6735 | asection *lcomm; | |
6736 | ||
6737 | switch (sym->st_shndx) | |
6738 | { | |
6739 | case SHN_X86_64_LCOMMON: | |
6740 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
6741 | if (lcomm == NULL) | |
6742 | { | |
6743 | lcomm = bfd_make_section_with_flags (abfd, | |
6744 | "LARGE_COMMON", | |
6745 | (SEC_ALLOC | |
6746 | | SEC_IS_COMMON | |
6747 | | SEC_LINKER_CREATED)); | |
6748 | if (lcomm == NULL) | |
6749 | return FALSE; | |
6750 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
6751 | } | |
6752 | *secp = lcomm; | |
6753 | *valp = sym->st_size; | |
c35bdf6e | 6754 | return TRUE; |
3b22753a | 6755 | } |
d8045f23 | 6756 | |
3b22753a L |
6757 | return TRUE; |
6758 | } | |
6759 | ||
6760 | ||
6761 | /* Given a BFD section, try to locate the corresponding ELF section | |
6762 | index. */ | |
6763 | ||
6764 | static bfd_boolean | |
351f65ca L |
6765 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
6766 | asection *sec, int *index_return) | |
3b22753a L |
6767 | { |
6768 | if (sec == &_bfd_elf_large_com_section) | |
6769 | { | |
91d6fa6a | 6770 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
6771 | return TRUE; |
6772 | } | |
6773 | return FALSE; | |
6774 | } | |
6775 | ||
6776 | /* Process a symbol. */ | |
6777 | ||
6778 | static void | |
351f65ca L |
6779 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
6780 | asymbol *asym) | |
3b22753a L |
6781 | { |
6782 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
6783 | ||
6784 | switch (elfsym->internal_elf_sym.st_shndx) | |
6785 | { | |
6786 | case SHN_X86_64_LCOMMON: | |
6787 | asym->section = &_bfd_elf_large_com_section; | |
6788 | asym->value = elfsym->internal_elf_sym.st_size; | |
6789 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
6790 | asym->flags &= ~BSF_GLOBAL; | |
6791 | break; | |
6792 | } | |
6793 | } | |
6794 | ||
6795 | static bfd_boolean | |
351f65ca | 6796 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
6797 | { |
6798 | return (sym->st_shndx == SHN_COMMON | |
6799 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
6800 | } | |
6801 | ||
6802 | static unsigned int | |
351f65ca | 6803 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
6804 | { |
6805 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
6806 | return SHN_COMMON; | |
6807 | else | |
6808 | return SHN_X86_64_LCOMMON; | |
6809 | } | |
6810 | ||
6811 | static asection * | |
351f65ca | 6812 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
6813 | { |
6814 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
6815 | return bfd_com_section_ptr; | |
6816 | else | |
6817 | return &_bfd_elf_large_com_section; | |
6818 | } | |
6819 | ||
6820 | static bfd_boolean | |
5d13b3b3 AM |
6821 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
6822 | const Elf_Internal_Sym *sym, | |
351f65ca | 6823 | asection **psec, |
5d13b3b3 AM |
6824 | bfd_boolean newdef, |
6825 | bfd_boolean olddef, | |
351f65ca | 6826 | bfd *oldbfd, |
5d13b3b3 | 6827 | const asection *oldsec) |
3b22753a L |
6828 | { |
6829 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
6830 | normal common symbol. We turn the large common symbol into a |
6831 | normal one. */ | |
5d13b3b3 | 6832 | if (!olddef |
3b22753a | 6833 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
6834 | && !newdef |
6835 | && bfd_is_com_section (*psec) | |
6836 | && oldsec != *psec) | |
3b22753a | 6837 | { |
00492999 | 6838 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 6839 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
6840 | { |
6841 | h->root.u.c.p->section | |
6842 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
6843 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
6844 | } | |
6845 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
6846 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
6847 | *psec = bfd_com_section_ptr; | |
3b22753a L |
6848 | } |
6849 | ||
6850 | return TRUE; | |
6851 | } | |
6852 | ||
6853 | static int | |
351f65ca L |
6854 | elf_x86_64_additional_program_headers (bfd *abfd, |
6855 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
6856 | { |
6857 | asection *s; | |
9a2e389a | 6858 | int count = 0; |
3b22753a L |
6859 | |
6860 | /* Check to see if we need a large readonly segment. */ | |
6861 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
6862 | if (s && (s->flags & SEC_LOAD)) | |
6863 | count++; | |
6864 | ||
6865 | /* Check to see if we need a large data segment. Since .lbss sections | |
6866 | is placed right after the .bss section, there should be no need for | |
6867 | a large data segment just because of .lbss. */ | |
6868 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
6869 | if (s && (s->flags & SEC_LOAD)) | |
6870 | count++; | |
6871 | ||
6872 | return count; | |
6873 | } | |
6874 | ||
fdc90cb4 JJ |
6875 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
6876 | ||
6877 | static bfd_boolean | |
351f65ca | 6878 | elf_x86_64_hash_symbol (struct elf_link_hash_entry *h) |
fdc90cb4 JJ |
6879 | { |
6880 | if (h->plt.offset != (bfd_vma) -1 | |
6881 | && !h->def_regular | |
6882 | && !h->pointer_equality_needed) | |
6883 | return FALSE; | |
6884 | ||
6885 | return _bfd_elf_hash_symbol (h); | |
6886 | } | |
6887 | ||
c543bf9a L |
6888 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
6889 | ||
6890 | static bfd_boolean | |
6891 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
6892 | const bfd_target *output) | |
6893 | { | |
6894 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
6895 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
6896 | && _bfd_elf_relocs_compatible (input, output)); | |
6897 | } | |
6898 | ||
9a2e389a | 6899 | static const struct bfd_elf_special_section |
351f65ca | 6900 | elf_x86_64_special_sections[]= |
3b22753a | 6901 | { |
0112cd26 NC |
6902 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
6903 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
6904 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
6905 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
6906 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
6907 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
6908 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
6909 | }; |
6910 | ||
6d00b590 | 6911 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
6912 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
6913 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 6914 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 6915 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 6916 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 6917 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 6918 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
6919 | |
6920 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 6921 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
6922 | #define elf_backend_want_got_plt 1 |
6923 | #define elf_backend_plt_readonly 1 | |
6924 | #define elf_backend_want_plt_sym 0 | |
6925 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 6926 | #define elf_backend_rela_normal 1 |
e41b3a13 | 6927 | #define elf_backend_plt_alignment 4 |
f7483970 | 6928 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 6929 | #define elf_backend_caches_rawsize 1 |
64f52338 | 6930 | #define elf_backend_dtrel_excludes_plt 1 |
5474d94f | 6931 | #define elf_backend_want_dynrelro 1 |
70256ad8 | 6932 | |
351f65ca | 6933 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 6934 | |
70256ad8 | 6935 | #define bfd_elf64_bfd_link_hash_table_create \ |
351f65ca | 6936 | elf_x86_64_link_hash_table_create |
351f65ca | 6937 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 6938 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 6939 | elf_x86_64_reloc_name_lookup |
70256ad8 | 6940 | |
351f65ca | 6941 | #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol |
c543bf9a | 6942 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca L |
6943 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
6944 | #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol | |
6945 | #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections | |
6946 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections | |
6947 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
233cc9c1 | 6948 | #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms |
351f65ca | 6949 | #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook |
351f65ca L |
6950 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus |
6951 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
6952 | #ifdef CORE_HEADER |
6953 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
6954 | #endif | |
351f65ca L |
6955 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
6956 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
6957 | #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections | |
6958 | #define elf_backend_always_size_sections elf_x86_64_always_size_sections | |
74541ad4 | 6959 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 6960 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
351f65ca | 6961 | #define bfd_elf64_mkobject elf_x86_64_mkobject |
0ff2b86e | 6962 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 6963 | |
d2b2c203 | 6964 | #define elf_backend_section_from_shdr \ |
351f65ca | 6965 | elf_x86_64_section_from_shdr |
d2b2c203 | 6966 | |
3b22753a | 6967 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 6968 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 6969 | #define elf_backend_add_symbol_hook \ |
351f65ca | 6970 | elf_x86_64_add_symbol_hook |
3b22753a | 6971 | #define elf_backend_symbol_processing \ |
351f65ca | 6972 | elf_x86_64_symbol_processing |
3b22753a | 6973 | #define elf_backend_common_section_index \ |
351f65ca | 6974 | elf_x86_64_common_section_index |
3b22753a | 6975 | #define elf_backend_common_section \ |
351f65ca | 6976 | elf_x86_64_common_section |
3b22753a | 6977 | #define elf_backend_common_definition \ |
351f65ca | 6978 | elf_x86_64_common_definition |
3b22753a | 6979 | #define elf_backend_merge_symbol \ |
351f65ca | 6980 | elf_x86_64_merge_symbol |
3b22753a | 6981 | #define elf_backend_special_sections \ |
351f65ca | 6982 | elf_x86_64_special_sections |
3b22753a | 6983 | #define elf_backend_additional_program_headers \ |
351f65ca | 6984 | elf_x86_64_additional_program_headers |
fdc90cb4 | 6985 | #define elf_backend_hash_symbol \ |
351f65ca | 6986 | elf_x86_64_hash_symbol |
8f79b794 L |
6987 | #define elf_backend_omit_section_dynsym \ |
6988 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
aec6b87e L |
6989 | #define elf_backend_fixup_symbol \ |
6990 | elf_x86_64_fixup_symbol | |
3b22753a | 6991 | |
8d88c4ca | 6992 | #include "elf64-target.h" |
9d7cbccd | 6993 | |
6036f486 ES |
6994 | /* CloudABI support. */ |
6995 | ||
6996 | #undef TARGET_LITTLE_SYM | |
6997 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec | |
6998 | #undef TARGET_LITTLE_NAME | |
6999 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" | |
7000 | ||
7001 | #undef ELF_OSABI | |
7002 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
7003 | ||
7004 | #undef elf64_bed | |
7005 | #define elf64_bed elf64_x86_64_cloudabi_bed | |
7006 | ||
7007 | #include "elf64-target.h" | |
7008 | ||
9d7cbccd NC |
7009 | /* FreeBSD support. */ |
7010 | ||
7011 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7012 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
9d7cbccd NC |
7013 | #undef TARGET_LITTLE_NAME |
7014 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
7015 | ||
d1036acb L |
7016 | #undef ELF_OSABI |
7017 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 7018 | |
9d7cbccd NC |
7019 | #undef elf64_bed |
7020 | #define elf64_bed elf64_x86_64_fbsd_bed | |
7021 | ||
7022 | #include "elf64-target.h" | |
8a9036a4 | 7023 | |
a6cc6b3b RO |
7024 | /* Solaris 2 support. */ |
7025 | ||
7026 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7027 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
7028 | #undef TARGET_LITTLE_NAME |
7029 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
7030 | ||
7031 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
7032 | objects won't be recognized. */ | |
7033 | #undef ELF_OSABI | |
7034 | ||
7035 | #undef elf64_bed | |
7036 | #define elf64_bed elf64_x86_64_sol2_bed | |
7037 | ||
7dc98aea RO |
7038 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
7039 | boundary. */ | |
84865015 | 7040 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
7041 | #define elf_backend_static_tls_alignment 16 |
7042 | ||
a6cc6b3b RO |
7043 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
7044 | ||
7045 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
7046 | File, p.63. */ | |
84865015 | 7047 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
7048 | #define elf_backend_want_plt_sym 1 |
7049 | ||
84865015 NC |
7050 | #undef elf_backend_strtab_flags |
7051 | #define elf_backend_strtab_flags SHF_STRINGS | |
7052 | ||
7053 | static bfd_boolean | |
5522f910 NC |
7054 | elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
7055 | bfd *obfd ATTRIBUTE_UNUSED, | |
7056 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
7057 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
7058 | { |
7059 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
7060 | and sh_link fields of Solaris specific section types. */ | |
7061 | return FALSE; | |
7062 | } | |
7063 | ||
5522f910 NC |
7064 | #undef elf_backend_copy_special_section_fields |
7065 | #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields | |
84865015 | 7066 | |
a6cc6b3b RO |
7067 | #include "elf64-target.h" |
7068 | ||
8059fb19 RM |
7069 | /* Native Client support. */ |
7070 | ||
64b384e1 RM |
7071 | static bfd_boolean |
7072 | elf64_x86_64_nacl_elf_object_p (bfd *abfd) | |
7073 | { | |
7074 | /* Set the right machine number for a NaCl x86-64 ELF64 file. */ | |
7075 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl); | |
7076 | return TRUE; | |
7077 | } | |
7078 | ||
8059fb19 | 7079 | #undef TARGET_LITTLE_SYM |
6d00b590 | 7080 | #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec |
8059fb19 RM |
7081 | #undef TARGET_LITTLE_NAME |
7082 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
7083 | #undef elf64_bed | |
7084 | #define elf64_bed elf64_x86_64_nacl_bed | |
7085 | ||
7086 | #undef ELF_MAXPAGESIZE | |
7087 | #undef ELF_MINPAGESIZE | |
7088 | #undef ELF_COMMONPAGESIZE | |
7089 | #define ELF_MAXPAGESIZE 0x10000 | |
7090 | #define ELF_MINPAGESIZE 0x10000 | |
7091 | #define ELF_COMMONPAGESIZE 0x10000 | |
7092 | ||
7093 | /* Restore defaults. */ | |
7094 | #undef ELF_OSABI | |
7095 | #undef elf_backend_static_tls_alignment | |
7096 | #undef elf_backend_want_plt_sym | |
7097 | #define elf_backend_want_plt_sym 0 | |
84865015 | 7098 | #undef elf_backend_strtab_flags |
5522f910 | 7099 | #undef elf_backend_copy_special_section_fields |
8059fb19 RM |
7100 | |
7101 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
7102 | ||
7103 | #undef elf_backend_plt_alignment | |
7104 | #define elf_backend_plt_alignment 5 | |
7105 | #define NACL_PLT_ENTRY_SIZE 64 | |
7106 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
7107 | ||
7108 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
7109 | { | |
7110 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
7111 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ | |
7112 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
7113 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
7114 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
7115 | ||
ea2d813e | 7116 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
70cc877f | 7117 | 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */ |
ea2d813e RM |
7118 | |
7119 | /* 32 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 7120 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 7121 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 7122 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 7123 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 7124 | 0x66, /* excess data16 prefix */ |
ea2d813e | 7125 | 0x90 /* nop */ |
8059fb19 RM |
7126 | }; |
7127 | ||
7128 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
7129 | { | |
7130 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
7131 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
7132 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
7133 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
7134 | ||
7135 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
3ddf1bdd | 7136 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
7137 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
7138 | ||
7139 | /* Lazy GOT entries point here (32-byte aligned). */ | |
7140 | 0x68, /* pushq immediate */ | |
7141 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
7142 | 0xe9, /* jmp relative */ | |
7143 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
7144 | ||
7145 | /* 22 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 7146 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
7147 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
7148 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ | |
7149 | }; | |
7150 | ||
7151 | /* .eh_frame covering the .plt section. */ | |
7152 | ||
7153 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
7154 | { | |
7155 | #if (PLT_CIE_LENGTH != 20 \ | |
7156 | || PLT_FDE_LENGTH != 36 \ | |
7157 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
7158 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
7159 | # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!" | |
7160 | #endif | |
7161 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
7162 | 0, 0, 0, 0, /* CIE ID */ | |
7163 | 1, /* CIE version */ | |
7164 | 'z', 'R', 0, /* Augmentation string */ | |
7165 | 1, /* Code alignment factor */ | |
7166 | 0x78, /* Data alignment factor */ | |
7167 | 16, /* Return address column */ | |
7168 | 1, /* Augmentation size */ | |
7169 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
7170 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
7171 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
7172 | DW_CFA_nop, DW_CFA_nop, | |
7173 | ||
7174 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
7175 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
7176 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
7177 | 0, 0, 0, 0, /* .plt size goes here */ | |
7178 | 0, /* Augmentation size */ | |
7179 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
7180 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
7181 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
7182 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
7183 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
7184 | 13, /* Block length */ | |
7185 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
7186 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
7187 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
7188 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
7189 | DW_CFA_nop, DW_CFA_nop | |
7190 | }; | |
7191 | ||
7192 | static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed = | |
7193 | { | |
7194 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ | |
7195 | elf_x86_64_nacl_plt_entry, /* plt_entry */ | |
7196 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
7197 | 2, /* plt0_got1_offset */ | |
7198 | 9, /* plt0_got2_offset */ | |
7199 | 13, /* plt0_got2_insn_end */ | |
7200 | 3, /* plt_got_offset */ | |
7201 | 33, /* plt_reloc_offset */ | |
7202 | 38, /* plt_plt_offset */ | |
7203 | 7, /* plt_got_insn_size */ | |
7204 | 42, /* plt_plt_insn_end */ | |
7205 | 32, /* plt_lazy_offset */ | |
7206 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ | |
7207 | sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */ | |
fff53dae L |
7208 | NULL, /* eh_frame_plt_got */ |
7209 | 0, /* eh_frame_plt_got_size */ | |
8059fb19 RM |
7210 | }; |
7211 | ||
7212 | #undef elf_backend_arch_data | |
7213 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
7214 | ||
64b384e1 RM |
7215 | #undef elf_backend_object_p |
7216 | #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p | |
5a68afcf RM |
7217 | #undef elf_backend_modify_segment_map |
7218 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
7219 | #undef elf_backend_modify_program_headers | |
7220 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
7221 | #undef elf_backend_final_write_processing |
7222 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 7223 | |
8059fb19 RM |
7224 | #include "elf64-target.h" |
7225 | ||
7226 | /* Native Client x32 support. */ | |
7227 | ||
64b384e1 RM |
7228 | static bfd_boolean |
7229 | elf32_x86_64_nacl_elf_object_p (bfd *abfd) | |
7230 | { | |
7231 | /* Set the right machine number for a NaCl x86-64 ELF32 file. */ | |
7232 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl); | |
7233 | return TRUE; | |
7234 | } | |
7235 | ||
8059fb19 | 7236 | #undef TARGET_LITTLE_SYM |
6d00b590 | 7237 | #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec |
8059fb19 RM |
7238 | #undef TARGET_LITTLE_NAME |
7239 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" | |
7240 | #undef elf32_bed | |
7241 | #define elf32_bed elf32_x86_64_nacl_bed | |
7242 | ||
7243 | #define bfd_elf32_bfd_link_hash_table_create \ | |
7244 | elf_x86_64_link_hash_table_create | |
8059fb19 RM |
7245 | #define bfd_elf32_bfd_reloc_type_lookup \ |
7246 | elf_x86_64_reloc_type_lookup | |
7247 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
7248 | elf_x86_64_reloc_name_lookup | |
7249 | #define bfd_elf32_mkobject \ | |
7250 | elf_x86_64_mkobject | |
b7365e5d L |
7251 | #define bfd_elf32_get_synthetic_symtab \ |
7252 | elf_x86_64_get_synthetic_symtab | |
8059fb19 RM |
7253 | |
7254 | #undef elf_backend_object_p | |
7255 | #define elf_backend_object_p \ | |
64b384e1 | 7256 | elf32_x86_64_nacl_elf_object_p |
8059fb19 RM |
7257 | |
7258 | #undef elf_backend_bfd_from_remote_memory | |
7259 | #define elf_backend_bfd_from_remote_memory \ | |
7260 | _bfd_elf32_bfd_from_remote_memory | |
7261 | ||
7262 | #undef elf_backend_size_info | |
7263 | #define elf_backend_size_info \ | |
7264 | _bfd_elf32_size_info | |
7265 | ||
7266 | #include "elf32-target.h" | |
7267 | ||
7268 | /* Restore defaults. */ | |
5a68afcf | 7269 | #undef elf_backend_object_p |
8059fb19 | 7270 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
7271 | #undef elf_backend_bfd_from_remote_memory |
7272 | #undef elf_backend_size_info | |
7273 | #undef elf_backend_modify_segment_map | |
7274 | #undef elf_backend_modify_program_headers | |
887badb3 | 7275 | #undef elf_backend_final_write_processing |
8059fb19 | 7276 | |
8a9036a4 L |
7277 | /* Intel L1OM support. */ |
7278 | ||
7279 | static bfd_boolean | |
7280 | elf64_l1om_elf_object_p (bfd *abfd) | |
7281 | { | |
7282 | /* Set the right machine number for an L1OM elf64 file. */ | |
7283 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
7284 | return TRUE; | |
7285 | } | |
7286 | ||
7287 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7288 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
7289 | #undef TARGET_LITTLE_NAME |
7290 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
7291 | #undef ELF_ARCH | |
7292 | #define ELF_ARCH bfd_arch_l1om | |
7293 | ||
7294 | #undef ELF_MACHINE_CODE | |
7295 | #define ELF_MACHINE_CODE EM_L1OM | |
7296 | ||
7297 | #undef ELF_OSABI | |
7298 | ||
7299 | #undef elf64_bed | |
7300 | #define elf64_bed elf64_l1om_bed | |
7301 | ||
7302 | #undef elf_backend_object_p | |
7303 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
7304 | ||
8059fb19 RM |
7305 | /* Restore defaults. */ |
7306 | #undef ELF_MAXPAGESIZE | |
7307 | #undef ELF_MINPAGESIZE | |
7308 | #undef ELF_COMMONPAGESIZE | |
7309 | #define ELF_MAXPAGESIZE 0x200000 | |
7310 | #define ELF_MINPAGESIZE 0x1000 | |
7311 | #define ELF_COMMONPAGESIZE 0x1000 | |
7312 | #undef elf_backend_plt_alignment | |
7313 | #define elf_backend_plt_alignment 4 | |
7314 | #undef elf_backend_arch_data | |
7315 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 7316 | |
8a9036a4 L |
7317 | #include "elf64-target.h" |
7318 | ||
7319 | /* FreeBSD L1OM support. */ | |
7320 | ||
7321 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7322 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
7323 | #undef TARGET_LITTLE_NAME |
7324 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
7325 | ||
7326 | #undef ELF_OSABI | |
7327 | #define ELF_OSABI ELFOSABI_FREEBSD | |
7328 | ||
7329 | #undef elf64_bed | |
7330 | #define elf64_bed elf64_l1om_fbsd_bed | |
7331 | ||
8a9036a4 | 7332 | #include "elf64-target.h" |
351f65ca | 7333 | |
7a9068fe L |
7334 | /* Intel K1OM support. */ |
7335 | ||
7336 | static bfd_boolean | |
7337 | elf64_k1om_elf_object_p (bfd *abfd) | |
7338 | { | |
7339 | /* Set the right machine number for an K1OM elf64 file. */ | |
7340 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
7341 | return TRUE; | |
7342 | } | |
7343 | ||
7344 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7345 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
7346 | #undef TARGET_LITTLE_NAME |
7347 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
7348 | #undef ELF_ARCH | |
7349 | #define ELF_ARCH bfd_arch_k1om | |
7350 | ||
7351 | #undef ELF_MACHINE_CODE | |
7352 | #define ELF_MACHINE_CODE EM_K1OM | |
7353 | ||
7354 | #undef ELF_OSABI | |
7355 | ||
7356 | #undef elf64_bed | |
7357 | #define elf64_bed elf64_k1om_bed | |
7358 | ||
7359 | #undef elf_backend_object_p | |
7360 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
7361 | ||
7362 | #undef elf_backend_static_tls_alignment | |
7363 | ||
7364 | #undef elf_backend_want_plt_sym | |
7365 | #define elf_backend_want_plt_sym 0 | |
7366 | ||
7367 | #include "elf64-target.h" | |
7368 | ||
7369 | /* FreeBSD K1OM support. */ | |
7370 | ||
7371 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7372 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
7373 | #undef TARGET_LITTLE_NAME |
7374 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
7375 | ||
7376 | #undef ELF_OSABI | |
7377 | #define ELF_OSABI ELFOSABI_FREEBSD | |
7378 | ||
7379 | #undef elf64_bed | |
7380 | #define elf64_bed elf64_k1om_fbsd_bed | |
7381 | ||
7382 | #include "elf64-target.h" | |
7383 | ||
351f65ca L |
7384 | /* 32bit x86-64 support. */ |
7385 | ||
351f65ca | 7386 | #undef TARGET_LITTLE_SYM |
6d00b590 | 7387 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
7388 | #undef TARGET_LITTLE_NAME |
7389 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 7390 | #undef elf32_bed |
351f65ca L |
7391 | |
7392 | #undef ELF_ARCH | |
7393 | #define ELF_ARCH bfd_arch_i386 | |
7394 | ||
7395 | #undef ELF_MACHINE_CODE | |
7396 | #define ELF_MACHINE_CODE EM_X86_64 | |
7397 | ||
351f65ca L |
7398 | #undef ELF_OSABI |
7399 | ||
351f65ca L |
7400 | #undef elf_backend_object_p |
7401 | #define elf_backend_object_p \ | |
7402 | elf32_x86_64_elf_object_p | |
7403 | ||
7404 | #undef elf_backend_bfd_from_remote_memory | |
7405 | #define elf_backend_bfd_from_remote_memory \ | |
7406 | _bfd_elf32_bfd_from_remote_memory | |
7407 | ||
7408 | #undef elf_backend_size_info | |
7409 | #define elf_backend_size_info \ | |
7410 | _bfd_elf32_size_info | |
7411 | ||
7412 | #include "elf32-target.h" |