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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 | |
38b12349 | 547 | /* The size in bytes of an entry in the lazy procedure linkage table. */ |
8d88c4ca | 548 | |
38b12349 | 549 | #define LAZY_PLT_ENTRY_SIZE 16 |
70256ad8 | 550 | |
38b12349 L |
551 | /* The size in bytes of an entry in the non-lazy procedure linkage |
552 | table. */ | |
70256ad8 | 553 | |
38b12349 L |
554 | #define NON_LAZY_PLT_ENTRY_SIZE 8 |
555 | ||
556 | /* The first entry in a lazy procedure linkage table looks like this. | |
557 | See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this | |
558 | works. */ | |
559 | ||
560 | static const bfd_byte elf_x86_64_lazy_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
70256ad8 | 561 | { |
653165cc AJ |
562 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
563 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 564 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
565 | }; |
566 | ||
38b12349 | 567 | /* Subsequent entries in a lazy procedure linkage table look like this. */ |
70256ad8 | 568 | |
38b12349 | 569 | static const bfd_byte elf_x86_64_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
70256ad8 | 570 | { |
653165cc | 571 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 572 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 573 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
574 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
575 | 0xe9, /* jmp relative */ | |
576 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
577 | }; | |
578 | ||
38b12349 | 579 | /* The first entry in a lazy procedure linkage table with BND prefix |
0ff2b86e L |
580 | like this. */ |
581 | ||
38b12349 | 582 | static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e L |
583 | { |
584 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
585 | 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */ | |
586 | 0x0f, 0x1f, 0 /* nopl (%rax) */ | |
587 | }; | |
588 | ||
38b12349 L |
589 | /* Subsequent entries for branches with BND prefx in a lazy procedure |
590 | linkage table look like this. */ | |
0ff2b86e | 591 | |
38b12349 | 592 | static const bfd_byte elf_x86_64_lazy_bnd_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e L |
593 | { |
594 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
595 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
596 | 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */ | |
597 | }; | |
598 | ||
ee2fdd6f L |
599 | /* The first entry in the IBT-enabled lazy procedure linkage table is the |
600 | the same as the lazy PLT with BND prefix so that bound registers are | |
601 | preserved when control is passed to dynamic linker. Subsequent | |
602 | entries for a IBT-enabled lazy procedure linkage table look like | |
603 | this. */ | |
604 | ||
605 | static const bfd_byte elf_x86_64_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
606 | { | |
607 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
608 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
609 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
610 | 0x90 /* nop */ | |
611 | }; | |
612 | ||
613 | /* The first entry in the x32 IBT-enabled lazy procedure linkage table | |
de194d85 | 614 | is the same as the normal lazy PLT. Subsequent entries for an |
ee2fdd6f L |
615 | x32 IBT-enabled lazy procedure linkage table look like this. */ |
616 | ||
617 | static const bfd_byte elf_x32_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
618 | { | |
619 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
620 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
621 | 0xe9, 0, 0, 0, 0, /* jmpq relative */ | |
622 | 0x66, 0x90 /* xchg %ax,%ax */ | |
623 | }; | |
624 | ||
38b12349 | 625 | /* Entries in the non-lazey procedure linkage table look like this. */ |
0ff2b86e | 626 | |
38b12349 | 627 | static const bfd_byte elf_x86_64_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 628 | { |
38b12349 L |
629 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
630 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
631 | 0x66, 0x90 /* xchg %ax,%ax */ | |
0ff2b86e L |
632 | }; |
633 | ||
38b12349 L |
634 | /* Entries for branches with BND prefix in the non-lazey procedure |
635 | linkage table look like this. */ | |
0ff2b86e | 636 | |
38b12349 | 637 | static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 638 | { |
38b12349 L |
639 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ |
640 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
641 | 0x90 /* nop */ | |
0ff2b86e L |
642 | }; |
643 | ||
ee2fdd6f L |
644 | /* Entries for branches with IBT-enabled in the non-lazey procedure |
645 | linkage table look like this. They have the same size as the lazy | |
646 | PLT entry. */ | |
647 | ||
648 | static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
649 | { | |
650 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
651 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ | |
652 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
653 | 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */ | |
654 | }; | |
655 | ||
656 | /* Entries for branches with IBT-enabled in the x32 non-lazey procedure | |
657 | linkage table look like this. They have the same size as the lazy | |
658 | PLT entry. */ | |
659 | ||
660 | static const bfd_byte elf_x32_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
661 | { | |
662 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
663 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ | |
664 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
665 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
666 | }; | |
667 | ||
38b12349 | 668 | /* .eh_frame covering the lazy .plt section. */ |
e41b3a13 | 669 | |
38b12349 | 670 | static const bfd_byte elf_x86_64_eh_frame_lazy_plt[] = |
e41b3a13 JJ |
671 | { |
672 | #define PLT_CIE_LENGTH 20 | |
673 | #define PLT_FDE_LENGTH 36 | |
674 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
675 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
676 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
677 | 0, 0, 0, 0, /* CIE ID */ | |
678 | 1, /* CIE version */ | |
679 | 'z', 'R', 0, /* Augmentation string */ | |
680 | 1, /* Code alignment factor */ | |
681 | 0x78, /* Data alignment factor */ | |
682 | 16, /* Return address column */ | |
683 | 1, /* Augmentation size */ | |
684 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
685 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
686 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
687 | DW_CFA_nop, DW_CFA_nop, | |
688 | ||
689 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
690 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
691 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
692 | 0, 0, 0, 0, /* .plt size goes here */ | |
693 | 0, /* Augmentation size */ | |
694 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
695 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
696 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
697 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
698 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
699 | 11, /* Block length */ | |
700 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
701 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
702 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
703 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
704 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
705 | }; | |
706 | ||
38b12349 | 707 | /* .eh_frame covering the lazy BND .plt section. */ |
9e659176 | 708 | |
38b12349 | 709 | static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt[] = |
9e659176 L |
710 | { |
711 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
712 | 0, 0, 0, 0, /* CIE ID */ | |
713 | 1, /* CIE version */ | |
714 | 'z', 'R', 0, /* Augmentation string */ | |
715 | 1, /* Code alignment factor */ | |
716 | 0x78, /* Data alignment factor */ | |
717 | 16, /* Return address column */ | |
718 | 1, /* Augmentation size */ | |
719 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
720 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
721 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
722 | DW_CFA_nop, DW_CFA_nop, | |
723 | ||
724 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
725 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
726 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
727 | 0, 0, 0, 0, /* .plt size goes here */ | |
728 | 0, /* Augmentation size */ | |
729 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
730 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
731 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
732 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
733 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
734 | 11, /* Block length */ | |
735 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
736 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
737 | DW_OP_lit15, DW_OP_and, DW_OP_lit5, DW_OP_ge, | |
738 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
739 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
740 | }; | |
741 | ||
ee2fdd6f L |
742 | /* .eh_frame covering the lazy .plt section with IBT-enabled. */ |
743 | ||
744 | static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt[] = | |
745 | { | |
746 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
747 | 0, 0, 0, 0, /* CIE ID */ | |
748 | 1, /* CIE version */ | |
749 | 'z', 'R', 0, /* Augmentation string */ | |
750 | 1, /* Code alignment factor */ | |
751 | 0x78, /* Data alignment factor */ | |
752 | 16, /* Return address column */ | |
753 | 1, /* Augmentation size */ | |
754 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
755 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
756 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
757 | DW_CFA_nop, DW_CFA_nop, | |
758 | ||
759 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
760 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
761 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
762 | 0, 0, 0, 0, /* .plt size goes here */ | |
763 | 0, /* Augmentation size */ | |
764 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
765 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
766 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
767 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
768 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
769 | 11, /* Block length */ | |
770 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
771 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
772 | DW_OP_lit15, DW_OP_and, DW_OP_lit10, DW_OP_ge, | |
773 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
774 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
775 | }; | |
776 | ||
777 | /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */ | |
778 | ||
779 | static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt[] = | |
780 | { | |
781 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
782 | 0, 0, 0, 0, /* CIE ID */ | |
783 | 1, /* CIE version */ | |
784 | 'z', 'R', 0, /* Augmentation string */ | |
785 | 1, /* Code alignment factor */ | |
786 | 0x78, /* Data alignment factor */ | |
787 | 16, /* Return address column */ | |
788 | 1, /* Augmentation size */ | |
789 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
790 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
791 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
792 | DW_CFA_nop, DW_CFA_nop, | |
793 | ||
794 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
795 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
796 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
797 | 0, 0, 0, 0, /* .plt size goes here */ | |
798 | 0, /* Augmentation size */ | |
799 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
800 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
801 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
802 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
803 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
804 | 11, /* Block length */ | |
805 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
806 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
807 | DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge, | |
808 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
809 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
810 | }; | |
811 | ||
38b12349 | 812 | /* .eh_frame covering the non-lazy .plt section. */ |
fff53dae | 813 | |
38b12349 | 814 | static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt[] = |
fff53dae L |
815 | { |
816 | #define PLT_GOT_FDE_LENGTH 20 | |
817 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
818 | 0, 0, 0, 0, /* CIE ID */ | |
819 | 1, /* CIE version */ | |
820 | 'z', 'R', 0, /* Augmentation string */ | |
821 | 1, /* Code alignment factor */ | |
822 | 0x78, /* Data alignment factor */ | |
823 | 16, /* Return address column */ | |
824 | 1, /* Augmentation size */ | |
825 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
826 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
827 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
828 | DW_CFA_nop, DW_CFA_nop, | |
829 | ||
830 | PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
831 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
38b12349 L |
832 | 0, 0, 0, 0, /* the start of non-lazy .plt goes here */ |
833 | 0, 0, 0, 0, /* non-lazy .plt size goes here */ | |
fff53dae L |
834 | 0, /* Augmentation size */ |
835 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, | |
836 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
837 | }; | |
838 | ||
38b12349 | 839 | struct elf_x86_64_lazy_plt_layout |
eed180f8 RM |
840 | { |
841 | /* Templates for the initial PLT entry and for subsequent entries. */ | |
842 | const bfd_byte *plt0_entry; | |
843 | const bfd_byte *plt_entry; | |
844 | unsigned int plt_entry_size; /* Size of each PLT entry. */ | |
845 | ||
846 | /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */ | |
847 | unsigned int plt0_got1_offset; | |
848 | unsigned int plt0_got2_offset; | |
849 | ||
850 | /* Offset of the end of the PC-relative instruction containing | |
851 | plt0_got2_offset. */ | |
852 | unsigned int plt0_got2_insn_end; | |
853 | ||
854 | /* Offsets into plt_entry that are to be replaced with... */ | |
855 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
856 | unsigned int plt_reloc_offset; /* ... offset into relocation table. */ | |
857 | unsigned int plt_plt_offset; /* ... offset to start of .plt. */ | |
858 | ||
859 | /* Length of the PC-relative instruction containing plt_got_offset. */ | |
860 | unsigned int plt_got_insn_size; | |
861 | ||
862 | /* Offset of the end of the PC-relative jump to plt0_entry. */ | |
863 | unsigned int plt_plt_insn_end; | |
864 | ||
865 | /* Offset into plt_entry where the initial value of the GOT entry points. */ | |
866 | unsigned int plt_lazy_offset; | |
867 | ||
38b12349 L |
868 | /* .eh_frame covering the lazy .plt section. */ |
869 | const bfd_byte *eh_frame_plt; | |
870 | unsigned int eh_frame_plt_size; | |
871 | }; | |
872 | ||
873 | struct elf_x86_64_non_lazy_plt_layout | |
874 | { | |
875 | /* Template for the lazy PLT entries. */ | |
876 | const bfd_byte *plt_entry; | |
877 | unsigned int plt_entry_size; /* Size of each PLT entry. */ | |
878 | ||
879 | /* Offsets into plt_entry that are to be replaced with... */ | |
880 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
881 | ||
882 | /* Length of the PC-relative instruction containing plt_got_offset. */ | |
883 | unsigned int plt_got_insn_size; | |
884 | ||
885 | /* .eh_frame covering the non-lazy .plt section. */ | |
886 | const bfd_byte *eh_frame_plt; | |
887 | unsigned int eh_frame_plt_size; | |
888 | }; | |
889 | ||
890 | struct elf_x86_64_plt_layout | |
891 | { | |
892 | /* Template for the PLT entries. */ | |
893 | const bfd_byte *plt_entry; | |
894 | unsigned int plt_entry_size; /* Size of each PLT entry. */ | |
895 | ||
896 | /* 1 has PLT0. */ | |
897 | unsigned int has_plt0; | |
898 | ||
899 | /* Offsets into plt_entry that are to be replaced with... */ | |
900 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
901 | ||
902 | /* Length of the PC-relative instruction containing plt_got_offset. */ | |
903 | unsigned int plt_got_insn_size; | |
904 | ||
eed180f8 RM |
905 | /* .eh_frame covering the .plt section. */ |
906 | const bfd_byte *eh_frame_plt; | |
907 | unsigned int eh_frame_plt_size; | |
38b12349 | 908 | }; |
fff53dae | 909 | |
38b12349 L |
910 | /* Architecture-specific backend data for x86-64. */ |
911 | ||
912 | struct elf_x86_64_backend_data | |
913 | { | |
914 | /* Target system. */ | |
915 | enum | |
916 | { | |
917 | is_normal, | |
918 | is_nacl | |
919 | } os; | |
eed180f8 RM |
920 | }; |
921 | ||
f8222080 L |
922 | #define get_elf_x86_64_arch_data(bed) \ |
923 | ((const struct elf_x86_64_backend_data *) (bed)->arch_data) | |
924 | ||
eed180f8 | 925 | #define get_elf_x86_64_backend_data(abfd) \ |
f8222080 | 926 | get_elf_x86_64_arch_data (get_elf_backend_data (abfd)) |
eed180f8 | 927 | |
eed180f8 | 928 | /* These are the standard parameters. */ |
38b12349 | 929 | static const struct elf_x86_64_lazy_plt_layout elf_x86_64_lazy_plt = |
eed180f8 | 930 | { |
38b12349 L |
931 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ |
932 | elf_x86_64_lazy_plt_entry, /* plt_entry */ | |
933 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
eed180f8 RM |
934 | 2, /* plt0_got1_offset */ |
935 | 8, /* plt0_got2_offset */ | |
936 | 12, /* plt0_got2_insn_end */ | |
937 | 2, /* plt_got_offset */ | |
938 | 7, /* plt_reloc_offset */ | |
939 | 12, /* plt_plt_offset */ | |
940 | 6, /* plt_got_insn_size */ | |
38b12349 | 941 | LAZY_PLT_ENTRY_SIZE, /* plt_plt_insn_end */ |
eed180f8 | 942 | 6, /* plt_lazy_offset */ |
38b12349 L |
943 | elf_x86_64_eh_frame_lazy_plt, /* eh_frame_plt */ |
944 | sizeof (elf_x86_64_eh_frame_lazy_plt) /* eh_frame_plt_size */ | |
945 | }; | |
946 | ||
947 | static const struct elf_x86_64_non_lazy_plt_layout elf_x86_64_non_lazy_plt = | |
948 | { | |
949 | elf_x86_64_non_lazy_plt_entry, /* plt_entry */ | |
950 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
951 | 2, /* plt_got_offset */ | |
952 | 6, /* plt_got_insn_size */ | |
953 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
954 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
eed180f8 RM |
955 | }; |
956 | ||
38b12349 | 957 | static const struct elf_x86_64_lazy_plt_layout elf_x86_64_lazy_bnd_plt = |
0ff2b86e | 958 | { |
38b12349 L |
959 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ |
960 | elf_x86_64_lazy_bnd_plt_entry, /* plt_entry */ | |
961 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
0ff2b86e L |
962 | 2, /* plt0_got1_offset */ |
963 | 1+8, /* plt0_got2_offset */ | |
964 | 1+12, /* plt0_got2_insn_end */ | |
965 | 1+2, /* plt_got_offset */ | |
966 | 1, /* plt_reloc_offset */ | |
967 | 7, /* plt_plt_offset */ | |
968 | 1+6, /* plt_got_insn_size */ | |
969 | 11, /* plt_plt_insn_end */ | |
970 | 0, /* plt_lazy_offset */ | |
38b12349 L |
971 | elf_x86_64_eh_frame_lazy_bnd_plt, /* eh_frame_plt */ |
972 | sizeof (elf_x86_64_eh_frame_lazy_bnd_plt) /* eh_frame_plt_size */ | |
973 | }; | |
974 | ||
975 | static const struct elf_x86_64_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt = | |
976 | { | |
977 | elf_x86_64_non_lazy_bnd_plt_entry, /* plt_entry */ | |
978 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
979 | 1+2, /* plt_got_offset */ | |
980 | 1+6, /* plt_got_insn_size */ | |
981 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
982 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
983 | }; | |
984 | ||
ee2fdd6f L |
985 | static const struct elf_x86_64_lazy_plt_layout elf_x86_64_lazy_ibt_plt = |
986 | { | |
987 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ | |
988 | elf_x86_64_lazy_ibt_plt_entry, /* plt_entry */ | |
989 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
990 | 2, /* plt0_got1_offset */ | |
991 | 1+8, /* plt0_got2_offset */ | |
992 | 1+12, /* plt0_got2_insn_end */ | |
993 | 4+1+2, /* plt_got_offset */ | |
994 | 4+1, /* plt_reloc_offset */ | |
995 | 4+1+6, /* plt_plt_offset */ | |
996 | 4+1+6, /* plt_got_insn_size */ | |
997 | 4+1+5+5, /* plt_plt_insn_end */ | |
998 | 0, /* plt_lazy_offset */ | |
999 | elf_x86_64_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
1000 | sizeof (elf_x86_64_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ | |
1001 | }; | |
1002 | ||
1003 | static const struct elf_x86_64_lazy_plt_layout elf_x32_lazy_ibt_plt = | |
1004 | { | |
1005 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ | |
1006 | elf_x32_lazy_ibt_plt_entry, /* plt_entry */ | |
1007 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
1008 | 2, /* plt0_got1_offset */ | |
1009 | 8, /* plt0_got2_offset */ | |
1010 | 12, /* plt0_got2_insn_end */ | |
1011 | 4+2, /* plt_got_offset */ | |
1012 | 4+1, /* plt_reloc_offset */ | |
1013 | 4+6, /* plt_plt_offset */ | |
1014 | 4+6, /* plt_got_insn_size */ | |
1015 | 4+5+5, /* plt_plt_insn_end */ | |
1016 | 0, /* plt_lazy_offset */ | |
1017 | elf_x32_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
1018 | sizeof (elf_x32_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ | |
1019 | }; | |
1020 | ||
1021 | static const struct elf_x86_64_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt = | |
1022 | { | |
1023 | elf_x86_64_non_lazy_ibt_plt_entry, /* plt_entry */ | |
1024 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
1025 | 4+1+2, /* plt_got_offset */ | |
1026 | 4+1+6, /* plt_got_insn_size */ | |
1027 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
1028 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
1029 | }; | |
1030 | ||
1031 | static const struct elf_x86_64_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt = | |
1032 | { | |
1033 | elf_x32_non_lazy_ibt_plt_entry, /* plt_entry */ | |
1034 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
1035 | 4+2, /* plt_got_offset */ | |
1036 | 4+6, /* plt_got_insn_size */ | |
1037 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
1038 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
1039 | }; | |
1040 | ||
38b12349 L |
1041 | static const struct elf_x86_64_backend_data elf_x86_64_arch_bed = |
1042 | { | |
1043 | is_normal /* os */ | |
0ff2b86e L |
1044 | }; |
1045 | ||
eed180f8 RM |
1046 | #define elf_backend_arch_data &elf_x86_64_arch_bed |
1047 | ||
aec6b87e L |
1048 | /* Is a undefined weak symbol which is resolved to 0. Reference to an |
1049 | undefined weak symbol is resolved to 0 when building executable if | |
1050 | it isn't dynamic and | |
1051 | 1. Has non-GOT/non-PLT relocations in text section. Or | |
1052 | 2. Has no GOT/PLT relocation. | |
84da4cf8 | 1053 | Local undefined weak symbol is always resolved to 0. |
aec6b87e | 1054 | */ |
e62b9723 | 1055 | #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \ |
aec6b87e | 1056 | ((EH)->elf.root.type == bfd_link_hash_undefweak \ |
84da4cf8 L |
1057 | && ((EH)->elf.forced_local \ |
1058 | || (bfd_link_executable (INFO) \ | |
1059 | && (elf_x86_64_hash_table (INFO)->interp == NULL \ | |
1060 | || !(GOT_RELOC) \ | |
1061 | || (EH)->has_non_got_reloc \ | |
1062 | || !(INFO)->dynamic_undefined_weak)))) | |
aec6b87e | 1063 | |
a5b4ee94 L |
1064 | /* Should copy relocation be generated for a symbol. Don't generate |
1065 | copy relocation against a protected symbol defined in a shared | |
1066 | object with GNU_PROPERTY_NO_COPY_ON_PROTECTED. */ | |
1067 | #define SYMBOL_NO_COPYRELOC(INFO, EH) \ | |
1068 | ((EH)->def_protected \ | |
1069 | && ((EH)->elf.root.type == bfd_link_hash_defined \ | |
1070 | || (EH)->elf.root.type == bfd_link_hash_defweak) \ | |
1071 | && elf_has_no_copy_on_protected ((EH)->elf.root.u.def.section->owner) \ | |
1072 | && ((EH)->elf.root.u.def.section->owner->flags & DYNAMIC) != 0 \ | |
1073 | && ((EH)->elf.root.u.def.section->flags & SEC_CODE) == 0) | |
1074 | ||
70256ad8 AJ |
1075 | /* x86-64 ELF linker hash entry. */ |
1076 | ||
351f65ca | 1077 | struct elf_x86_64_link_hash_entry |
70256ad8 | 1078 | { |
c434dee6 | 1079 | struct elf_link_hash_entry elf; |
70256ad8 | 1080 | |
c434dee6 | 1081 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 1082 | struct elf_dyn_relocs *dyn_relocs; |
bffbf940 JJ |
1083 | |
1084 | #define GOT_UNKNOWN 0 | |
1085 | #define GOT_NORMAL 1 | |
1086 | #define GOT_TLS_GD 2 | |
1087 | #define GOT_TLS_IE 3 | |
67a4f2b7 AO |
1088 | #define GOT_TLS_GDESC 4 |
1089 | #define GOT_TLS_GD_BOTH_P(type) \ | |
1090 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
1091 | #define GOT_TLS_GD_P(type) \ | |
1092 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
1093 | #define GOT_TLS_GDESC_P(type) \ | |
1094 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
1095 | #define GOT_TLS_GD_ANY_P(type) \ | |
1096 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
bffbf940 | 1097 | unsigned char tls_type; |
67a4f2b7 | 1098 | |
bc696fd5 L |
1099 | /* TRUE if a weak symbol with a real definition needs a copy reloc. |
1100 | When there is a weak symbol with a real definition, the processor | |
1101 | independent code will have arranged for us to see the real | |
1102 | definition first. We need to copy the needs_copy bit from the | |
1103 | real definition and check it when allowing copy reloc in PIE. */ | |
1104 | unsigned int needs_copy : 1; | |
1105 | ||
aec6b87e L |
1106 | /* TRUE if symbol has GOT or PLT relocations. */ |
1107 | unsigned int has_got_reloc : 1; | |
1108 | ||
1109 | /* TRUE if symbol has non-GOT/non-PLT relocations in text sections. */ | |
1110 | unsigned int has_non_got_reloc : 1; | |
1111 | ||
9e9821dd L |
1112 | /* Don't call finish_dynamic_symbol on this symbol. */ |
1113 | unsigned int no_finish_dynamic_symbol : 1; | |
1114 | ||
5fdda9d6 | 1115 | /* TRUE if symbol is __tls_get_addr. */ |
1d4af308 | 1116 | unsigned int tls_get_addr : 1; |
e2cbcd91 | 1117 | |
a5b4ee94 L |
1118 | /* TRUE if symbol is defined as a protected symbol. */ |
1119 | unsigned int def_protected : 1; | |
1120 | ||
04ebc307 L |
1121 | /* Reference count of C/C++ function pointer relocations in read-write |
1122 | section which can be resolved at run-time. */ | |
1123 | bfd_signed_vma func_pointer_refcount; | |
1124 | ||
dd7e64d4 L |
1125 | /* Information about the GOT PLT entry. Filled when there are both |
1126 | GOT and PLT relocations against the same function. */ | |
1127 | union gotplt_union plt_got; | |
1128 | ||
f2c29a16 L |
1129 | /* Information about the second PLT entry. */ |
1130 | union gotplt_union plt_second; | |
0ff2b86e | 1131 | |
67a4f2b7 AO |
1132 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, |
1133 | starting at the end of the jump table. */ | |
1134 | bfd_vma tlsdesc_got; | |
bffbf940 JJ |
1135 | }; |
1136 | ||
351f65ca L |
1137 | #define elf_x86_64_hash_entry(ent) \ |
1138 | ((struct elf_x86_64_link_hash_entry *)(ent)) | |
bffbf940 | 1139 | |
351f65ca | 1140 | struct elf_x86_64_obj_tdata |
bffbf940 JJ |
1141 | { |
1142 | struct elf_obj_tdata root; | |
1143 | ||
1144 | /* tls_type for each local got entry. */ | |
1145 | char *local_got_tls_type; | |
67a4f2b7 AO |
1146 | |
1147 | /* GOTPLT entries for TLS descriptors. */ | |
1148 | bfd_vma *local_tlsdesc_gotent; | |
70256ad8 AJ |
1149 | }; |
1150 | ||
351f65ca L |
1151 | #define elf_x86_64_tdata(abfd) \ |
1152 | ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any) | |
bffbf940 | 1153 | |
351f65ca L |
1154 | #define elf_x86_64_local_got_tls_type(abfd) \ |
1155 | (elf_x86_64_tdata (abfd)->local_got_tls_type) | |
bffbf940 | 1156 | |
351f65ca L |
1157 | #define elf_x86_64_local_tlsdesc_gotent(abfd) \ |
1158 | (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent) | |
bffbf940 | 1159 | |
0ffa91dd NC |
1160 | #define is_x86_64_elf(bfd) \ |
1161 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
1162 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 1163 | && elf_object_id (bfd) == X86_64_ELF_DATA) |
0ffa91dd NC |
1164 | |
1165 | static bfd_boolean | |
351f65ca | 1166 | elf_x86_64_mkobject (bfd *abfd) |
0ffa91dd | 1167 | { |
351f65ca | 1168 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata), |
4dfe6ac6 | 1169 | X86_64_ELF_DATA); |
0ffa91dd NC |
1170 | } |
1171 | ||
c434dee6 | 1172 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 1173 | |
351f65ca | 1174 | struct elf_x86_64_link_hash_table |
407443a3 | 1175 | { |
c434dee6 | 1176 | struct elf_link_hash_table elf; |
70256ad8 | 1177 | |
c434dee6 | 1178 | /* Short-cuts to get to dynamic linker sections. */ |
aec6b87e | 1179 | asection *interp; |
e41b3a13 | 1180 | asection *plt_eh_frame; |
f2c29a16 L |
1181 | asection *plt_second; |
1182 | asection *plt_second_eh_frame; | |
dd7e64d4 | 1183 | asection *plt_got; |
fff53dae | 1184 | asection *plt_got_eh_frame; |
70256ad8 | 1185 | |
38b12349 L |
1186 | /* Parameters describing PLT generation, lazy or non-lazy. */ |
1187 | struct elf_x86_64_plt_layout plt; | |
1188 | ||
1189 | /* Parameters describing lazy PLT generation. */ | |
1190 | const struct elf_x86_64_lazy_plt_layout *lazy_plt; | |
1191 | ||
1192 | /* Parameters describing non-lazy PLT generation. */ | |
1193 | const struct elf_x86_64_non_lazy_plt_layout *non_lazy_plt; | |
1194 | ||
4dfe6ac6 NC |
1195 | union |
1196 | { | |
bffbf940 JJ |
1197 | bfd_signed_vma refcount; |
1198 | bfd_vma offset; | |
1199 | } tls_ld_got; | |
1200 | ||
67a4f2b7 AO |
1201 | /* The amount of space used by the jump slots in the GOT. */ |
1202 | bfd_vma sgotplt_jump_table_size; | |
1203 | ||
87d72d41 AM |
1204 | /* Small local sym cache. */ |
1205 | struct sym_cache sym_cache; | |
9f03412a | 1206 | |
351f65ca L |
1207 | bfd_vma (*r_info) (bfd_vma, bfd_vma); |
1208 | bfd_vma (*r_sym) (bfd_vma); | |
248775ba | 1209 | unsigned int pointer_r_type; |
351f65ca L |
1210 | const char *dynamic_interpreter; |
1211 | int dynamic_interpreter_size; | |
1212 | ||
9f03412a AO |
1213 | /* _TLS_MODULE_BASE_ symbol. */ |
1214 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
1215 | |
1216 | /* Used by local STT_GNU_IFUNC symbols. */ | |
1217 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
1218 | void * loc_hash_memory; |
1219 | ||
1220 | /* The offset into splt of the PLT entry for the TLS descriptor | |
1221 | resolver. Special values are 0, if not necessary (or not found | |
1222 | to be necessary yet), and -1 if needed but not determined | |
1223 | yet. */ | |
1224 | bfd_vma tlsdesc_plt; | |
1225 | /* The offset into sgot of the GOT entry used by the PLT entry | |
1226 | above. */ | |
1227 | bfd_vma tlsdesc_got; | |
e1f98742 L |
1228 | |
1229 | /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */ | |
1230 | bfd_vma next_jump_slot_index; | |
1231 | /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */ | |
1232 | bfd_vma next_irelative_index; | |
2df3368d L |
1233 | |
1234 | /* TRUE if there are dynamic relocs against IFUNC symbols that apply | |
1235 | to read-only sections. */ | |
1236 | bfd_boolean readonly_dynrelocs_against_ifunc; | |
c434dee6 | 1237 | }; |
70256ad8 AJ |
1238 | |
1239 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca | 1240 | |
351f65ca | 1241 | #define elf_x86_64_hash_table(p) \ |
4dfe6ac6 | 1242 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
351f65ca | 1243 | == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL) |
8d88c4ca | 1244 | |
351f65ca | 1245 | #define elf_x86_64_compute_jump_table_size(htab) \ |
6de2ae4a | 1246 | ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE) |
67a4f2b7 | 1247 | |
407443a3 | 1248 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
1249 | |
1250 | static struct bfd_hash_entry * | |
351f65ca L |
1251 | elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry, |
1252 | struct bfd_hash_table *table, | |
1253 | const char *string) | |
70256ad8 | 1254 | { |
70256ad8 | 1255 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
1256 | subclass. */ |
1257 | if (entry == NULL) | |
1258 | { | |
a50b1753 | 1259 | entry = (struct bfd_hash_entry *) |
eed180f8 RM |
1260 | bfd_hash_allocate (table, |
1261 | sizeof (struct elf_x86_64_link_hash_entry)); | |
c434dee6 AJ |
1262 | if (entry == NULL) |
1263 | return entry; | |
1264 | } | |
70256ad8 AJ |
1265 | |
1266 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
1267 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
1268 | if (entry != NULL) | |
70256ad8 | 1269 | { |
351f65ca | 1270 | struct elf_x86_64_link_hash_entry *eh; |
c434dee6 | 1271 | |
351f65ca | 1272 | eh = (struct elf_x86_64_link_hash_entry *) entry; |
c434dee6 | 1273 | eh->dyn_relocs = NULL; |
bffbf940 | 1274 | eh->tls_type = GOT_UNKNOWN; |
bc696fd5 | 1275 | eh->needs_copy = 0; |
aec6b87e L |
1276 | eh->has_got_reloc = 0; |
1277 | eh->has_non_got_reloc = 0; | |
9e9821dd | 1278 | eh->no_finish_dynamic_symbol = 0; |
1d4af308 | 1279 | eh->tls_get_addr = 0; |
04ebc307 | 1280 | eh->func_pointer_refcount = 0; |
f2c29a16 | 1281 | eh->plt_second.offset = (bfd_vma) -1; |
dd7e64d4 | 1282 | eh->plt_got.offset = (bfd_vma) -1; |
67a4f2b7 | 1283 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
1284 | } |
1285 | ||
c434dee6 | 1286 | return entry; |
70256ad8 AJ |
1287 | } |
1288 | ||
c25bc9fc L |
1289 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
1290 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
1291 | as global symbol. We reuse indx and dynstr_index for local symbol | |
1292 | hash since they aren't used by global symbols in this backend. */ | |
1293 | ||
1294 | static hashval_t | |
351f65ca | 1295 | elf_x86_64_local_htab_hash (const void *ptr) |
c25bc9fc L |
1296 | { |
1297 | struct elf_link_hash_entry *h | |
1298 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 1299 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
1300 | } |
1301 | ||
1302 | /* Compare local hash entries. */ | |
1303 | ||
1304 | static int | |
351f65ca | 1305 | elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2) |
c25bc9fc L |
1306 | { |
1307 | struct elf_link_hash_entry *h1 | |
1308 | = (struct elf_link_hash_entry *) ptr1; | |
1309 | struct elf_link_hash_entry *h2 | |
1310 | = (struct elf_link_hash_entry *) ptr2; | |
1311 | ||
1312 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
1313 | } | |
1314 | ||
1315 | /* Find and/or create a hash entry for local symbol. */ | |
1316 | ||
1317 | static struct elf_link_hash_entry * | |
351f65ca L |
1318 | elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab, |
1319 | bfd *abfd, const Elf_Internal_Rela *rel, | |
1320 | bfd_boolean create) | |
c25bc9fc | 1321 | { |
351f65ca | 1322 | struct elf_x86_64_link_hash_entry e, *ret; |
c25bc9fc | 1323 | asection *sec = abfd->sections; |
d2149d72 | 1324 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
351f65ca | 1325 | htab->r_sym (rel->r_info)); |
c25bc9fc L |
1326 | void **slot; |
1327 | ||
1328 | e.elf.indx = sec->id; | |
351f65ca | 1329 | e.elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc L |
1330 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, |
1331 | create ? INSERT : NO_INSERT); | |
1332 | ||
1333 | if (!slot) | |
1334 | return NULL; | |
1335 | ||
1336 | if (*slot) | |
1337 | { | |
351f65ca | 1338 | ret = (struct elf_x86_64_link_hash_entry *) *slot; |
c25bc9fc L |
1339 | return &ret->elf; |
1340 | } | |
1341 | ||
351f65ca | 1342 | ret = (struct elf_x86_64_link_hash_entry *) |
c25bc9fc | 1343 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, |
351f65ca | 1344 | sizeof (struct elf_x86_64_link_hash_entry)); |
c25bc9fc L |
1345 | if (ret) |
1346 | { | |
1347 | memset (ret, 0, sizeof (*ret)); | |
1348 | ret->elf.indx = sec->id; | |
351f65ca | 1349 | ret->elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc | 1350 | ret->elf.dynindx = -1; |
04ebc307 | 1351 | ret->func_pointer_refcount = 0; |
dd7e64d4 | 1352 | ret->plt_got.offset = (bfd_vma) -1; |
c25bc9fc L |
1353 | *slot = ret; |
1354 | } | |
1355 | return &ret->elf; | |
1356 | } | |
1357 | ||
68faa637 AM |
1358 | /* Destroy an X86-64 ELF linker hash table. */ |
1359 | ||
1360 | static void | |
d495ab0d | 1361 | elf_x86_64_link_hash_table_free (bfd *obfd) |
68faa637 AM |
1362 | { |
1363 | struct elf_x86_64_link_hash_table *htab | |
d495ab0d | 1364 | = (struct elf_x86_64_link_hash_table *) obfd->link.hash; |
68faa637 AM |
1365 | |
1366 | if (htab->loc_hash_table) | |
1367 | htab_delete (htab->loc_hash_table); | |
1368 | if (htab->loc_hash_memory) | |
1369 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
d495ab0d | 1370 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
1371 | } |
1372 | ||
8d88c4ca NC |
1373 | /* Create an X86-64 ELF linker hash table. */ |
1374 | ||
1375 | static struct bfd_link_hash_table * | |
351f65ca | 1376 | elf_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca | 1377 | { |
351f65ca L |
1378 | struct elf_x86_64_link_hash_table *ret; |
1379 | bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table); | |
8d88c4ca | 1380 | |
7bf52ea2 | 1381 | ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt); |
c434dee6 | 1382 | if (ret == NULL) |
8d88c4ca NC |
1383 | return NULL; |
1384 | ||
eb4ff4d6 | 1385 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
351f65ca L |
1386 | elf_x86_64_link_hash_newfunc, |
1387 | sizeof (struct elf_x86_64_link_hash_entry), | |
4dfe6ac6 | 1388 | X86_64_ELF_DATA)) |
8d88c4ca | 1389 | { |
e2d34d7d | 1390 | free (ret); |
8d88c4ca NC |
1391 | return NULL; |
1392 | } | |
1393 | ||
351f65ca L |
1394 | if (ABI_64_P (abfd)) |
1395 | { | |
1396 | ret->r_info = elf64_r_info; | |
1397 | ret->r_sym = elf64_r_sym; | |
248775ba | 1398 | ret->pointer_r_type = R_X86_64_64; |
351f65ca L |
1399 | ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; |
1400 | ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; | |
1401 | } | |
1402 | else | |
1403 | { | |
1404 | ret->r_info = elf32_r_info; | |
1405 | ret->r_sym = elf32_r_sym; | |
248775ba | 1406 | ret->pointer_r_type = R_X86_64_32; |
351f65ca L |
1407 | ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; |
1408 | ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER; | |
1409 | } | |
1410 | ||
c25bc9fc | 1411 | ret->loc_hash_table = htab_try_create (1024, |
351f65ca L |
1412 | elf_x86_64_local_htab_hash, |
1413 | elf_x86_64_local_htab_eq, | |
c25bc9fc L |
1414 | NULL); |
1415 | ret->loc_hash_memory = objalloc_create (); | |
1416 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
1417 | { | |
d495ab0d | 1418 | elf_x86_64_link_hash_table_free (abfd); |
c25bc9fc L |
1419 | return NULL; |
1420 | } | |
d495ab0d | 1421 | ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free; |
c25bc9fc | 1422 | |
c434dee6 AJ |
1423 | return &ret->elf.root; |
1424 | } | |
1425 | ||
c434dee6 AJ |
1426 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
1427 | ||
1428 | static void | |
351f65ca L |
1429 | elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
1430 | struct elf_link_hash_entry *dir, | |
1431 | struct elf_link_hash_entry *ind) | |
c434dee6 | 1432 | { |
351f65ca | 1433 | struct elf_x86_64_link_hash_entry *edir, *eind; |
c434dee6 | 1434 | |
351f65ca L |
1435 | edir = (struct elf_x86_64_link_hash_entry *) dir; |
1436 | eind = (struct elf_x86_64_link_hash_entry *) ind; | |
c434dee6 | 1437 | |
e81830c5 AM |
1438 | edir->has_got_reloc |= eind->has_got_reloc; |
1439 | edir->has_non_got_reloc |= eind->has_non_got_reloc; | |
aec6b87e | 1440 | |
c434dee6 AJ |
1441 | if (eind->dyn_relocs != NULL) |
1442 | { | |
1443 | if (edir->dyn_relocs != NULL) | |
1444 | { | |
e03a8ed8 L |
1445 | struct elf_dyn_relocs **pp; |
1446 | struct elf_dyn_relocs *p; | |
c434dee6 | 1447 | |
fcfa13d2 | 1448 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
1449 | list. Merge any entries against the same section. */ |
1450 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1451 | { | |
e03a8ed8 | 1452 | struct elf_dyn_relocs *q; |
c434dee6 AJ |
1453 | |
1454 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1455 | if (q->sec == p->sec) | |
1456 | { | |
1457 | q->pc_count += p->pc_count; | |
1458 | q->count += p->count; | |
1459 | *pp = p->next; | |
1460 | break; | |
1461 | } | |
1462 | if (q == NULL) | |
1463 | pp = &p->next; | |
1464 | } | |
1465 | *pp = edir->dyn_relocs; | |
1466 | } | |
1467 | ||
1468 | edir->dyn_relocs = eind->dyn_relocs; | |
1469 | eind->dyn_relocs = NULL; | |
1470 | } | |
1471 | ||
bffbf940 JJ |
1472 | if (ind->root.type == bfd_link_hash_indirect |
1473 | && dir->got.refcount <= 0) | |
1474 | { | |
1475 | edir->tls_type = eind->tls_type; | |
1476 | eind->tls_type = GOT_UNKNOWN; | |
1477 | } | |
1478 | ||
d40d037c AJ |
1479 | if (ELIMINATE_COPY_RELOCS |
1480 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1481 | && dir->dynamic_adjusted) |
1482 | { | |
1483 | /* If called to transfer flags for a weakdef during processing | |
1484 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1485 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
e81830c5 AM |
1486 | if (dir->versioned != versioned_hidden) |
1487 | dir->ref_dynamic |= ind->ref_dynamic; | |
f5385ebf AM |
1488 | dir->ref_regular |= ind->ref_regular; |
1489 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1490 | dir->needs_plt |= ind->needs_plt; | |
1491 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1492 | } | |
d40d037c | 1493 | else |
04ebc307 L |
1494 | { |
1495 | if (eind->func_pointer_refcount > 0) | |
1496 | { | |
1497 | edir->func_pointer_refcount += eind->func_pointer_refcount; | |
1498 | eind->func_pointer_refcount = 0; | |
1499 | } | |
1500 | ||
1501 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
1502 | } | |
8d88c4ca NC |
1503 | } |
1504 | ||
b34976b6 | 1505 | static bfd_boolean |
27482721 | 1506 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 1507 | { |
8d88c4ca NC |
1508 | /* Set the right machine number for an x86-64 elf64 file. */ |
1509 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 1510 | return TRUE; |
8d88c4ca NC |
1511 | } |
1512 | ||
8059fb19 RM |
1513 | static bfd_boolean |
1514 | elf32_x86_64_elf_object_p (bfd *abfd) | |
1515 | { | |
1516 | /* Set the right machine number for an x86-64 elf32 file. */ | |
1517 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
1518 | return TRUE; | |
1519 | } | |
1520 | ||
142411ca L |
1521 | /* Return TRUE if the TLS access code sequence support transition |
1522 | from R_TYPE. */ | |
1523 | ||
1524 | static bfd_boolean | |
351f65ca L |
1525 | elf_x86_64_check_tls_transition (bfd *abfd, |
1526 | struct bfd_link_info *info, | |
1527 | asection *sec, | |
1528 | bfd_byte *contents, | |
1529 | Elf_Internal_Shdr *symtab_hdr, | |
1530 | struct elf_link_hash_entry **sym_hashes, | |
1531 | unsigned int r_type, | |
1532 | const Elf_Internal_Rela *rel, | |
1533 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1534 | { |
142411ca L |
1535 | unsigned int val; |
1536 | unsigned long r_symndx; | |
5c98a14e | 1537 | bfd_boolean largepic = FALSE; |
142411ca L |
1538 | struct elf_link_hash_entry *h; |
1539 | bfd_vma offset; | |
351f65ca | 1540 | struct elf_x86_64_link_hash_table *htab; |
e2cbcd91 | 1541 | bfd_byte *call; |
1d4af308 | 1542 | bfd_boolean indirect_call; |
142411ca | 1543 | |
351f65ca | 1544 | htab = elf_x86_64_hash_table (info); |
142411ca | 1545 | offset = rel->r_offset; |
bffbf940 | 1546 | switch (r_type) |
142411ca L |
1547 | { |
1548 | case R_X86_64_TLSGD: | |
1549 | case R_X86_64_TLSLD: | |
1550 | if ((rel + 1) >= relend) | |
1551 | return FALSE; | |
1552 | ||
1553 | if (r_type == R_X86_64_TLSGD) | |
1554 | { | |
52bc799a | 1555 | /* Check transition from GD access model. For 64bit, only |
142411ca | 1556 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
e2cbcd91 L |
1557 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1558 | or | |
1559 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
1560 | .byte 0x66; rex64 | |
1561 | call *__tls_get_addr@GOTPCREL(%rip) | |
1562 | which may be converted to | |
1563 | addr32 call __tls_get_addr | |
52bc799a L |
1564 | can transit to different access model. For 32bit, only |
1565 | leaq foo@tlsgd(%rip), %rdi | |
e2cbcd91 L |
1566 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1567 | or | |
1568 | leaq foo@tlsgd(%rip), %rdi | |
1569 | .byte 0x66; rex64 | |
1570 | call *__tls_get_addr@GOTPCREL(%rip) | |
1571 | which may be converted to | |
1572 | addr32 call __tls_get_addr | |
1573 | can transit to different access model. For largepic, | |
5c98a14e | 1574 | we also support: |
e2cbcd91 L |
1575 | leaq foo@tlsgd(%rip), %rdi |
1576 | movabsq $__tls_get_addr@pltoff, %rax | |
1577 | addq $r15, %rax | |
1578 | call *%rax | |
1579 | or | |
5c98a14e JJ |
1580 | leaq foo@tlsgd(%rip), %rdi |
1581 | movabsq $__tls_get_addr@pltoff, %rax | |
1582 | addq $rbx, %rax | |
e2cbcd91 | 1583 | call *%rax */ |
142411ca | 1584 | |
fa289a5f AM |
1585 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; |
1586 | ||
5c98a14e | 1587 | if ((offset + 12) > sec->size) |
142411ca | 1588 | return FALSE; |
52bc799a | 1589 | |
e2cbcd91 L |
1590 | call = contents + offset + 4; |
1591 | if (call[0] != 0x66 | |
1592 | || !((call[1] == 0x48 | |
1593 | && call[2] == 0xff | |
1594 | && call[3] == 0x15) | |
1595 | || (call[1] == 0x48 | |
1596 | && call[2] == 0x67 | |
1597 | && call[3] == 0xe8) | |
1598 | || (call[1] == 0x66 | |
1599 | && call[2] == 0x48 | |
1600 | && call[3] == 0xe8))) | |
5c98a14e JJ |
1601 | { |
1602 | if (!ABI_64_P (abfd) | |
1603 | || (offset + 19) > sec->size | |
1604 | || offset < 3 | |
e2cbcd91 L |
1605 | || memcmp (call - 7, leaq + 1, 3) != 0 |
1606 | || memcmp (call, "\x48\xb8", 2) != 0 | |
1607 | || call[11] != 0x01 | |
1608 | || call[13] != 0xff | |
1609 | || call[14] != 0xd0 | |
1610 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1611 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1612 | return FALSE; |
1613 | largepic = TRUE; | |
1614 | } | |
1615 | else if (ABI_64_P (abfd)) | |
52bc799a | 1616 | { |
52bc799a | 1617 | if (offset < 4 |
fa289a5f | 1618 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1619 | return FALSE; |
1620 | } | |
1621 | else | |
1622 | { | |
52bc799a | 1623 | if (offset < 3 |
fa289a5f | 1624 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1625 | return FALSE; |
1626 | } | |
e2cbcd91 | 1627 | indirect_call = call[2] == 0xff; |
142411ca L |
1628 | } |
1629 | else | |
1630 | { | |
1631 | /* Check transition from LD access model. Only | |
1632 | leaq foo@tlsld(%rip), %rdi; | |
e2cbcd91 L |
1633 | call __tls_get_addr@PLT |
1634 | or | |
1635 | leaq foo@tlsld(%rip), %rdi; | |
1636 | call *__tls_get_addr@GOTPCREL(%rip) | |
1637 | which may be converted to | |
1638 | addr32 call __tls_get_addr | |
5c98a14e JJ |
1639 | can transit to different access model. For largepic |
1640 | we also support: | |
e2cbcd91 L |
1641 | leaq foo@tlsld(%rip), %rdi |
1642 | movabsq $__tls_get_addr@pltoff, %rax | |
1643 | addq $r15, %rax | |
1644 | call *%rax | |
1645 | or | |
5c98a14e JJ |
1646 | leaq foo@tlsld(%rip), %rdi |
1647 | movabsq $__tls_get_addr@pltoff, %rax | |
1648 | addq $rbx, %rax | |
e2cbcd91 | 1649 | call *%rax */ |
142411ca | 1650 | |
fa289a5f | 1651 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1652 | |
1653 | if (offset < 3 || (offset + 9) > sec->size) | |
1654 | return FALSE; | |
1655 | ||
5c98a14e | 1656 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
142411ca | 1657 | return FALSE; |
5c98a14e | 1658 | |
e2cbcd91 L |
1659 | call = contents + offset + 4; |
1660 | if (!(call[0] == 0xe8 | |
1661 | || (call[0] == 0xff && call[1] == 0x15) | |
1662 | || (call[0] == 0x67 && call[1] == 0xe8))) | |
5c98a14e JJ |
1663 | { |
1664 | if (!ABI_64_P (abfd) | |
1665 | || (offset + 19) > sec->size | |
e2cbcd91 L |
1666 | || memcmp (call, "\x48\xb8", 2) != 0 |
1667 | || call[11] != 0x01 | |
1668 | || call[13] != 0xff | |
1669 | || call[14] != 0xd0 | |
1670 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1671 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1672 | return FALSE; |
1673 | largepic = TRUE; | |
1674 | } | |
e2cbcd91 | 1675 | indirect_call = call[0] == 0xff; |
142411ca L |
1676 | } |
1677 | ||
351f65ca | 1678 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1679 | if (r_symndx < symtab_hdr->sh_info) |
1680 | return FALSE; | |
1681 | ||
1682 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1d4af308 L |
1683 | if (h == NULL |
1684 | || !((struct elf_x86_64_link_hash_entry *) h)->tls_get_addr) | |
e2cbcd91 L |
1685 | return FALSE; |
1686 | else if (largepic) | |
1687 | return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64; | |
1688 | else if (indirect_call) | |
1689 | return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_GOTPCRELX; | |
1690 | else | |
1691 | return (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32 | |
1692 | || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
142411ca L |
1693 | |
1694 | case R_X86_64_GOTTPOFF: | |
1695 | /* Check transition from IE access model: | |
4a4c5f25 L |
1696 | mov foo@gottpoff(%rip), %reg |
1697 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1698 | */ |
1699 | ||
4a4c5f25 L |
1700 | /* Check REX prefix first. */ |
1701 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1702 | { | |
1703 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1704 | if (val != 0x48 && val != 0x4c) | |
1705 | { | |
1706 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1707 | if (ABI_64_P (abfd)) | |
1708 | return FALSE; | |
1709 | } | |
1710 | } | |
1711 | else | |
1712 | { | |
1713 | /* X32 may not have any REX prefix. */ | |
1714 | if (ABI_64_P (abfd)) | |
1715 | return FALSE; | |
1716 | if (offset < 2 || (offset + 3) > sec->size) | |
1717 | return FALSE; | |
1718 | } | |
142411ca L |
1719 | |
1720 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1721 | if (val != 0x8b && val != 0x03) | |
1722 | return FALSE; | |
1723 | ||
1724 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1725 | return (val & 0xc7) == 5; | |
1726 | ||
1727 | case R_X86_64_GOTPC32_TLSDESC: | |
1728 | /* Check transition from GDesc access model: | |
1729 | leaq x@tlsdesc(%rip), %rax | |
1730 | ||
1731 | Make sure it's a leaq adding rip to a 32-bit offset | |
1732 | into any register, although it's probably almost always | |
1733 | going to be rax. */ | |
1734 | ||
1735 | if (offset < 3 || (offset + 4) > sec->size) | |
1736 | return FALSE; | |
1737 | ||
1738 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1739 | if ((val & 0xfb) != 0x48) | |
1740 | return FALSE; | |
1741 | ||
1742 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1743 | return FALSE; | |
1744 | ||
1745 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1746 | return (val & 0xc7) == 0x05; | |
1747 | ||
1748 | case R_X86_64_TLSDESC_CALL: | |
1749 | /* Check transition from GDesc access model: | |
1750 | call *x@tlsdesc(%rax) | |
1751 | */ | |
1752 | if (offset + 2 <= sec->size) | |
1753 | { | |
1754 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
e2cbcd91 L |
1755 | call = contents + offset; |
1756 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1757 | } |
1758 | ||
1759 | return FALSE; | |
1760 | ||
1761 | default: | |
1762 | abort (); | |
1763 | } | |
1764 | } | |
1765 | ||
1766 | /* Return TRUE if the TLS access transition is OK or no transition | |
1767 | will be performed. Update R_TYPE if there is a transition. */ | |
1768 | ||
1769 | static bfd_boolean | |
351f65ca L |
1770 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1771 | asection *sec, bfd_byte *contents, | |
1772 | Elf_Internal_Shdr *symtab_hdr, | |
1773 | struct elf_link_hash_entry **sym_hashes, | |
1774 | unsigned int *r_type, int tls_type, | |
1775 | const Elf_Internal_Rela *rel, | |
1776 | const Elf_Internal_Rela *relend, | |
1777 | struct elf_link_hash_entry *h, | |
bedfd056 L |
1778 | unsigned long r_symndx, |
1779 | bfd_boolean from_relocate_section) | |
142411ca L |
1780 | { |
1781 | unsigned int from_type = *r_type; | |
1782 | unsigned int to_type = from_type; | |
1783 | bfd_boolean check = TRUE; | |
1784 | ||
bb1cb422 L |
1785 | /* Skip TLS transition for functions. */ |
1786 | if (h != NULL | |
1787 | && (h->type == STT_FUNC | |
1788 | || h->type == STT_GNU_IFUNC)) | |
1789 | return TRUE; | |
1790 | ||
142411ca | 1791 | switch (from_type) |
bffbf940 JJ |
1792 | { |
1793 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1794 | case R_X86_64_GOTPC32_TLSDESC: |
1795 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1796 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1797 | if (bfd_link_executable (info)) |
142411ca L |
1798 | { |
1799 | if (h == NULL) | |
1800 | to_type = R_X86_64_TPOFF32; | |
1801 | else | |
1802 | to_type = R_X86_64_GOTTPOFF; | |
1803 | } | |
1804 | ||
bedfd056 L |
1805 | /* When we are called from elf_x86_64_relocate_section, there may |
1806 | be additional transitions based on TLS_TYPE. */ | |
1807 | if (from_relocate_section) | |
142411ca L |
1808 | { |
1809 | unsigned int new_to_type = to_type; | |
1810 | ||
0e1862bb | 1811 | if (bfd_link_executable (info) |
142411ca L |
1812 | && h != NULL |
1813 | && h->dynindx == -1 | |
1814 | && tls_type == GOT_TLS_IE) | |
1815 | new_to_type = R_X86_64_TPOFF32; | |
1816 | ||
1817 | if (to_type == R_X86_64_TLSGD | |
1818 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1819 | || to_type == R_X86_64_TLSDESC_CALL) | |
1820 | { | |
1821 | if (tls_type == GOT_TLS_IE) | |
1822 | new_to_type = R_X86_64_GOTTPOFF; | |
1823 | } | |
1824 | ||
1825 | /* We checked the transition before when we were called from | |
351f65ca | 1826 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1827 | transition which hasn't been checked before. */ |
1828 | check = new_to_type != to_type && from_type == to_type; | |
1829 | to_type = new_to_type; | |
1830 | } | |
1831 | ||
1832 | break; | |
1833 | ||
bffbf940 | 1834 | case R_X86_64_TLSLD: |
0e1862bb | 1835 | if (bfd_link_executable (info)) |
142411ca L |
1836 | to_type = R_X86_64_TPOFF32; |
1837 | break; | |
1838 | ||
1839 | default: | |
1840 | return TRUE; | |
bffbf940 JJ |
1841 | } |
1842 | ||
142411ca L |
1843 | /* Return TRUE if there is no transition. */ |
1844 | if (from_type == to_type) | |
1845 | return TRUE; | |
1846 | ||
1847 | /* Check if the transition can be performed. */ | |
1848 | if (check | |
351f65ca L |
1849 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1850 | symtab_hdr, sym_hashes, | |
1851 | from_type, rel, relend)) | |
142411ca | 1852 | { |
2f629d23 | 1853 | reloc_howto_type *from, *to; |
4c544807 | 1854 | const char *name; |
142411ca | 1855 | |
351f65ca L |
1856 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1857 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1858 | |
4c544807 L |
1859 | if (h) |
1860 | name = h->root.root.string; | |
1861 | else | |
1862 | { | |
351f65ca | 1863 | struct elf_x86_64_link_hash_table *htab; |
4dfe6ac6 | 1864 | |
351f65ca | 1865 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1866 | if (htab == NULL) |
1867 | name = "*unknown*"; | |
1868 | else | |
1869 | { | |
1870 | Elf_Internal_Sym *isym; | |
1871 | ||
1872 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1873 | abfd, r_symndx); | |
1874 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1875 | } | |
4c544807 L |
1876 | } |
1877 | ||
4eca0228 | 1878 | _bfd_error_handler |
695344c0 | 1879 | /* xgettext:c-format */ |
d42c267e | 1880 | (_("%B: TLS transition from %s to %s against `%s' at %#Lx " |
142411ca | 1881 | "in section `%A' failed"), |
d42c267e | 1882 | abfd, from->name, to->name, name, rel->r_offset, sec); |
142411ca L |
1883 | bfd_set_error (bfd_error_bad_value); |
1884 | return FALSE; | |
1885 | } | |
1886 | ||
1887 | *r_type = to_type; | |
1888 | return TRUE; | |
bffbf940 JJ |
1889 | } |
1890 | ||
c1d11331 L |
1891 | /* Rename some of the generic section flags to better document how they |
1892 | are used here. */ | |
338c190a L |
1893 | #define need_convert_load sec_flg0 |
1894 | #define check_relocs_failed sec_flg1 | |
1895 | ||
1896 | static bfd_boolean | |
aab921ad L |
1897 | elf_x86_64_need_pic (struct bfd_link_info *info, |
1898 | bfd *input_bfd, asection *sec, | |
338c190a L |
1899 | struct elf_link_hash_entry *h, |
1900 | Elf_Internal_Shdr *symtab_hdr, | |
1901 | Elf_Internal_Sym *isym, | |
1902 | reloc_howto_type *howto) | |
1903 | { | |
1904 | const char *v = ""; | |
1905 | const char *und = ""; | |
1906 | const char *pic = ""; | |
aab921ad | 1907 | const char *object; |
338c190a L |
1908 | |
1909 | const char *name; | |
1910 | if (h) | |
1911 | { | |
1912 | name = h->root.root.string; | |
1913 | switch (ELF_ST_VISIBILITY (h->other)) | |
1914 | { | |
1915 | case STV_HIDDEN: | |
1916 | v = _("hidden symbol "); | |
1917 | break; | |
1918 | case STV_INTERNAL: | |
1919 | v = _("internal symbol "); | |
1920 | break; | |
1921 | case STV_PROTECTED: | |
1922 | v = _("protected symbol "); | |
1923 | break; | |
1924 | default: | |
a5b4ee94 L |
1925 | if (((struct elf_x86_64_link_hash_entry *) h)->def_protected) |
1926 | v = _("protected symbol "); | |
1927 | else | |
1928 | v = _("symbol "); | |
338c190a L |
1929 | pic = _("; recompile with -fPIC"); |
1930 | break; | |
1931 | } | |
1932 | ||
1933 | if (!h->def_regular && !h->def_dynamic) | |
1934 | und = _("undefined "); | |
1935 | } | |
1936 | else | |
1937 | { | |
1938 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL); | |
1939 | pic = _("; recompile with -fPIC"); | |
1940 | } | |
1941 | ||
aab921ad L |
1942 | if (bfd_link_dll (info)) |
1943 | object = _("a shared object"); | |
1944 | else if (bfd_link_pie (info)) | |
1945 | object = _("a PIE object"); | |
1946 | else | |
1947 | object = _("a PDE object"); | |
1948 | ||
695344c0 | 1949 | /* xgettext:c-format */ |
4eca0228 | 1950 | _bfd_error_handler (_("%B: relocation %s against %s%s`%s' can " |
aab921ad L |
1951 | "not be used when making %s%s"), |
1952 | input_bfd, howto->name, und, v, name, | |
1953 | object, pic); | |
338c190a L |
1954 | bfd_set_error (bfd_error_bad_value); |
1955 | sec->check_relocs_failed = 1; | |
1956 | return FALSE; | |
1957 | } | |
c1d11331 | 1958 | |
c175a657 L |
1959 | /* With the local symbol, foo, we convert |
1960 | mov foo@GOTPCREL(%rip), %reg | |
1961 | to | |
1962 | lea foo(%rip), %reg | |
1963 | and convert | |
1964 | call/jmp *foo@GOTPCREL(%rip) | |
1965 | to | |
1966 | nop call foo/jmp foo nop | |
1967 | When PIC is false, convert | |
1968 | test %reg, foo@GOTPCREL(%rip) | |
1969 | to | |
1970 | test $foo, %reg | |
1971 | and convert | |
1972 | binop foo@GOTPCREL(%rip), %reg | |
1973 | to | |
1974 | binop $foo, %reg | |
1975 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1976 | instructions. */ | |
1977 | ||
1978 | static bfd_boolean | |
1979 | elf_x86_64_convert_load_reloc (bfd *abfd, asection *sec, | |
1980 | bfd_byte *contents, | |
1981 | Elf_Internal_Rela *irel, | |
1982 | struct elf_link_hash_entry *h, | |
1983 | bfd_boolean *converted, | |
1984 | struct bfd_link_info *link_info) | |
1985 | { | |
1986 | struct elf_x86_64_link_hash_table *htab; | |
1987 | bfd_boolean is_pic; | |
1988 | bfd_boolean require_reloc_pc32; | |
1989 | bfd_boolean relocx; | |
1990 | bfd_boolean to_reloc_pc32; | |
1991 | asection *tsec; | |
1992 | char symtype; | |
1993 | bfd_signed_vma raddend; | |
1994 | unsigned int opcode; | |
1995 | unsigned int modrm; | |
1996 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
1997 | unsigned int r_symndx; | |
1998 | bfd_vma toff; | |
1999 | bfd_vma roff = irel->r_offset; | |
2000 | ||
2001 | if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2)) | |
2002 | return TRUE; | |
2003 | ||
2004 | raddend = irel->r_addend; | |
2005 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
2006 | if (raddend != -4) | |
2007 | return TRUE; | |
2008 | ||
2009 | htab = elf_x86_64_hash_table (link_info); | |
2010 | is_pic = bfd_link_pic (link_info); | |
2011 | ||
2012 | relocx = (r_type == R_X86_64_GOTPCRELX | |
2013 | || r_type == R_X86_64_REX_GOTPCRELX); | |
2014 | ||
2015 | /* TRUE if we can convert only to R_X86_64_PC32. Enable it for | |
2016 | --no-relax. */ | |
2017 | require_reloc_pc32 | |
2018 | = link_info->disable_target_specific_optimizations > 1; | |
2019 | ||
2020 | r_symndx = htab->r_sym (irel->r_info); | |
2021 | ||
2022 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
2023 | ||
2024 | /* Convert mov to lea since it has been done for a while. */ | |
2025 | if (opcode != 0x8b) | |
2026 | { | |
2027 | /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX | |
2028 | for call, jmp or one of adc, add, and, cmp, or, sbb, sub, | |
2029 | test, xor instructions. */ | |
2030 | if (!relocx) | |
2031 | return TRUE; | |
2032 | } | |
2033 | ||
2034 | /* We convert only to R_X86_64_PC32: | |
2035 | 1. Branch. | |
2036 | 2. R_X86_64_GOTPCREL since we can't modify REX byte. | |
2037 | 3. require_reloc_pc32 is true. | |
2038 | 4. PIC. | |
2039 | */ | |
2040 | to_reloc_pc32 = (opcode == 0xff | |
2041 | || !relocx | |
2042 | || require_reloc_pc32 | |
2043 | || is_pic); | |
2044 | ||
2045 | /* Get the symbol referred to by the reloc. */ | |
2046 | if (h == NULL) | |
2047 | { | |
2048 | Elf_Internal_Sym *isym | |
2049 | = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx); | |
2050 | ||
2051 | /* Skip relocation against undefined symbols. */ | |
2052 | if (isym->st_shndx == SHN_UNDEF) | |
2053 | return TRUE; | |
2054 | ||
2055 | symtype = ELF_ST_TYPE (isym->st_info); | |
2056 | ||
2057 | if (isym->st_shndx == SHN_ABS) | |
2058 | tsec = bfd_abs_section_ptr; | |
2059 | else if (isym->st_shndx == SHN_COMMON) | |
2060 | tsec = bfd_com_section_ptr; | |
2061 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
2062 | tsec = &_bfd_elf_large_com_section; | |
2063 | else | |
2064 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
2065 | ||
2066 | toff = isym->st_value; | |
2067 | } | |
2068 | else | |
2069 | { | |
2070 | /* Undefined weak symbol is only bound locally in executable | |
2071 | and its reference is resolved as 0 without relocation | |
2072 | overflow. We can only perform this optimization for | |
2073 | GOTPCRELX relocations since we need to modify REX byte. | |
2074 | It is OK convert mov with R_X86_64_GOTPCREL to | |
2075 | R_X86_64_PC32. */ | |
2076 | if ((relocx || opcode == 0x8b) | |
2077 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, | |
2078 | TRUE, | |
2079 | elf_x86_64_hash_entry (h))) | |
2080 | { | |
2081 | if (opcode == 0xff) | |
2082 | { | |
2083 | /* Skip for branch instructions since R_X86_64_PC32 | |
2084 | may overflow. */ | |
2085 | if (require_reloc_pc32) | |
2086 | return TRUE; | |
2087 | } | |
2088 | else if (relocx) | |
2089 | { | |
2090 | /* For non-branch instructions, we can convert to | |
2091 | R_X86_64_32/R_X86_64_32S since we know if there | |
2092 | is a REX byte. */ | |
2093 | to_reloc_pc32 = FALSE; | |
2094 | } | |
2095 | ||
2096 | /* Since we don't know the current PC when PIC is true, | |
2097 | we can't convert to R_X86_64_PC32. */ | |
2098 | if (to_reloc_pc32 && is_pic) | |
2099 | return TRUE; | |
2100 | ||
2101 | goto convert; | |
2102 | } | |
2103 | /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since | |
2104 | ld.so may use its link-time address. */ | |
cbd0eecf L |
2105 | else if (h->start_stop |
2106 | || ((h->def_regular | |
2107 | || h->root.type == bfd_link_hash_defined | |
2108 | || h->root.type == bfd_link_hash_defweak) | |
2109 | && h != htab->elf.hdynamic | |
2110 | && SYMBOL_REFERENCES_LOCAL (link_info, h))) | |
c175a657 L |
2111 | { |
2112 | /* bfd_link_hash_new or bfd_link_hash_undefined is | |
2113 | set by an assignment in a linker script in | |
cbd0eecf L |
2114 | bfd_elf_record_link_assignment. start_stop is set |
2115 | on __start_SECNAME/__stop_SECNAME which mark section | |
2116 | SECNAME. */ | |
2117 | if (h->start_stop | |
2118 | || (h->def_regular | |
2119 | && (h->root.type == bfd_link_hash_new | |
2120 | || h->root.type == bfd_link_hash_undefined | |
2121 | || ((h->root.type == bfd_link_hash_defined | |
2122 | || h->root.type == bfd_link_hash_defweak) | |
2123 | && h->root.u.def.section == bfd_und_section_ptr)))) | |
c175a657 L |
2124 | { |
2125 | /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */ | |
2126 | if (require_reloc_pc32) | |
2127 | return TRUE; | |
2128 | goto convert; | |
2129 | } | |
2130 | tsec = h->root.u.def.section; | |
2131 | toff = h->root.u.def.value; | |
2132 | symtype = h->type; | |
2133 | } | |
2134 | else | |
2135 | return TRUE; | |
2136 | } | |
2137 | ||
2168b268 L |
2138 | /* Don't convert GOTPCREL relocation against large section. */ |
2139 | if (elf_section_data (tsec) != NULL | |
2140 | && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0) | |
2141 | return TRUE; | |
2142 | ||
c175a657 L |
2143 | /* We can only estimate relocation overflow for R_X86_64_PC32. */ |
2144 | if (!to_reloc_pc32) | |
2145 | goto convert; | |
2146 | ||
2147 | if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE) | |
2148 | { | |
2149 | /* At this stage in linking, no SEC_MERGE symbol has been | |
2150 | adjusted, so all references to such symbols need to be | |
2151 | passed through _bfd_merged_section_offset. (Later, in | |
2152 | relocate_section, all SEC_MERGE symbols *except* for | |
2153 | section symbols have been adjusted.) | |
2154 | ||
2155 | gas may reduce relocations against symbols in SEC_MERGE | |
2156 | sections to a relocation against the section symbol when | |
2157 | the original addend was zero. When the reloc is against | |
2158 | a section symbol we should include the addend in the | |
2159 | offset passed to _bfd_merged_section_offset, since the | |
2160 | location of interest is the original symbol. On the | |
2161 | other hand, an access to "sym+addend" where "sym" is not | |
2162 | a section symbol should not include the addend; Such an | |
2163 | access is presumed to be an offset from "sym"; The | |
2164 | location of interest is just "sym". */ | |
2165 | if (symtype == STT_SECTION) | |
2166 | toff += raddend; | |
2167 | ||
2168 | toff = _bfd_merged_section_offset (abfd, &tsec, | |
2169 | elf_section_data (tsec)->sec_info, | |
2170 | toff); | |
2171 | ||
2172 | if (symtype != STT_SECTION) | |
2173 | toff += raddend; | |
2174 | } | |
2175 | else | |
2176 | toff += raddend; | |
2177 | ||
2178 | /* Don't convert if R_X86_64_PC32 relocation overflows. */ | |
2179 | if (tsec->output_section == sec->output_section) | |
2180 | { | |
2181 | if ((toff - roff + 0x80000000) > 0xffffffff) | |
2182 | return TRUE; | |
2183 | } | |
2184 | else | |
2185 | { | |
2186 | bfd_signed_vma distance; | |
2187 | ||
2188 | /* At this point, we don't know the load addresses of TSEC | |
2189 | section nor SEC section. We estimate the distrance between | |
2190 | SEC and TSEC. We store the estimated distances in the | |
2191 | compressed_size field of the output section, which is only | |
2192 | used to decompress the compressed input section. */ | |
2193 | if (sec->output_section->compressed_size == 0) | |
2194 | { | |
2195 | asection *asect; | |
2196 | bfd_size_type size = 0; | |
2197 | for (asect = link_info->output_bfd->sections; | |
2198 | asect != NULL; | |
2199 | asect = asect->next) | |
2200 | /* Skip debug sections since compressed_size is used to | |
2201 | compress debug sections. */ | |
2202 | if ((asect->flags & SEC_DEBUGGING) == 0) | |
2203 | { | |
2204 | asection *i; | |
2205 | for (i = asect->map_head.s; | |
2206 | i != NULL; | |
2207 | i = i->map_head.s) | |
2208 | { | |
2209 | size = align_power (size, i->alignment_power); | |
2210 | size += i->size; | |
2211 | } | |
2212 | asect->compressed_size = size; | |
2213 | } | |
2214 | } | |
2215 | ||
2216 | /* Don't convert GOTPCREL relocations if TSEC isn't placed | |
2217 | after SEC. */ | |
2218 | distance = (tsec->output_section->compressed_size | |
2219 | - sec->output_section->compressed_size); | |
2220 | if (distance < 0) | |
2221 | return TRUE; | |
2222 | ||
2223 | /* Take PT_GNU_RELRO segment into account by adding | |
2224 | maxpagesize. */ | |
2225 | if ((toff + distance + get_elf_backend_data (abfd)->maxpagesize | |
2226 | - roff + 0x80000000) > 0xffffffff) | |
2227 | return TRUE; | |
2228 | } | |
2229 | ||
2230 | convert: | |
2231 | if (opcode == 0xff) | |
2232 | { | |
2233 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
2234 | unsigned int nop; | |
2235 | unsigned int disp; | |
2236 | bfd_vma nop_offset; | |
2237 | ||
2238 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
2239 | R_X86_64_PC32. */ | |
2240 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
2241 | if (modrm == 0x25) | |
2242 | { | |
2243 | /* Convert to "jmp foo nop". */ | |
2244 | modrm = 0xe9; | |
2245 | nop = NOP_OPCODE; | |
2246 | nop_offset = irel->r_offset + 3; | |
2247 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
2248 | irel->r_offset -= 1; | |
2249 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
2250 | } | |
2251 | else | |
2252 | { | |
e2cbcd91 L |
2253 | struct elf_x86_64_link_hash_entry *eh |
2254 | = (struct elf_x86_64_link_hash_entry *) h; | |
2255 | ||
c175a657 L |
2256 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
2257 | is a nop prefix. */ | |
2258 | modrm = 0xe8; | |
e2cbcd91 L |
2259 | /* To support TLS optimization, always use addr32 prefix for |
2260 | "call *__tls_get_addr@GOTPCREL(%rip)". */ | |
1d4af308 | 2261 | if (eh && eh->tls_get_addr) |
c175a657 | 2262 | { |
e2cbcd91 L |
2263 | nop = 0x67; |
2264 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
2265 | } |
2266 | else | |
e2cbcd91 L |
2267 | { |
2268 | nop = link_info->call_nop_byte; | |
2269 | if (link_info->call_nop_as_suffix) | |
2270 | { | |
2271 | nop_offset = irel->r_offset + 3; | |
2272 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
2273 | irel->r_offset -= 1; | |
2274 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
2275 | } | |
2276 | else | |
2277 | nop_offset = irel->r_offset - 2; | |
2278 | } | |
c175a657 L |
2279 | } |
2280 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
2281 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
2282 | r_type = R_X86_64_PC32; | |
2283 | } | |
2284 | else | |
2285 | { | |
2286 | unsigned int rex; | |
2287 | unsigned int rex_mask = REX_R; | |
2288 | ||
2289 | if (r_type == R_X86_64_REX_GOTPCRELX) | |
2290 | rex = bfd_get_8 (abfd, contents + roff - 3); | |
2291 | else | |
2292 | rex = 0; | |
2293 | ||
2294 | if (opcode == 0x8b) | |
2295 | { | |
2296 | if (to_reloc_pc32) | |
2297 | { | |
2298 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
2299 | "lea foo(%rip), %reg". */ | |
2300 | opcode = 0x8d; | |
2301 | r_type = R_X86_64_PC32; | |
2302 | } | |
2303 | else | |
2304 | { | |
2305 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
2306 | "mov $foo, %reg". */ | |
2307 | opcode = 0xc7; | |
2308 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
2309 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
2310 | if ((rex & REX_W) != 0 | |
2311 | && ABI_64_P (link_info->output_bfd)) | |
2312 | { | |
2313 | /* Keep the REX_W bit in REX byte for LP64. */ | |
2314 | r_type = R_X86_64_32S; | |
2315 | goto rewrite_modrm_rex; | |
2316 | } | |
2317 | else | |
2318 | { | |
2319 | /* If the REX_W bit in REX byte isn't needed, | |
2320 | use R_X86_64_32 and clear the W bit to avoid | |
2321 | sign-extend imm32 to imm64. */ | |
2322 | r_type = R_X86_64_32; | |
2323 | /* Clear the W bit in REX byte. */ | |
2324 | rex_mask |= REX_W; | |
2325 | goto rewrite_modrm_rex; | |
2326 | } | |
2327 | } | |
2328 | } | |
2329 | else | |
2330 | { | |
2331 | /* R_X86_64_PC32 isn't supported. */ | |
2332 | if (to_reloc_pc32) | |
2333 | return TRUE; | |
2334 | ||
2335 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
2336 | if (opcode == 0x85) | |
2337 | { | |
2338 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
2339 | "test $foo, %reg". */ | |
2340 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
2341 | opcode = 0xf7; | |
2342 | } | |
2343 | else | |
2344 | { | |
2345 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
2346 | "binop $foo, %reg". */ | |
2347 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
2348 | opcode = 0x81; | |
2349 | } | |
2350 | ||
2351 | /* Use R_X86_64_32 with 32-bit operand to avoid relocation | |
2352 | overflow when sign-extending imm32 to imm64. */ | |
2353 | r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32; | |
2354 | ||
2355 | rewrite_modrm_rex: | |
2356 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
2357 | ||
2358 | if (rex) | |
2359 | { | |
2360 | /* Move the R bit to the B bit in REX byte. */ | |
2361 | rex = (rex & ~rex_mask) | (rex & REX_R) >> 2; | |
2362 | bfd_put_8 (abfd, rex, contents + roff - 3); | |
2363 | } | |
2364 | ||
2365 | /* No addend for R_X86_64_32/R_X86_64_32S relocations. */ | |
2366 | irel->r_addend = 0; | |
2367 | } | |
2368 | ||
2369 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
2370 | } | |
2371 | ||
2372 | irel->r_info = htab->r_info (r_symndx, r_type); | |
2373 | ||
2374 | *converted = TRUE; | |
2375 | ||
2376 | return TRUE; | |
2377 | } | |
2378 | ||
70256ad8 | 2379 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
2380 | calculate needed space in the global offset table, procedure |
2381 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 2382 | |
b34976b6 | 2383 | static bfd_boolean |
351f65ca L |
2384 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
2385 | asection *sec, | |
2386 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 2387 | { |
351f65ca | 2388 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2389 | Elf_Internal_Shdr *symtab_hdr; |
2390 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
2391 | const Elf_Internal_Rela *rel; |
2392 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 2393 | asection *sreloc; |
bedfd056 | 2394 | bfd_byte *contents; |
70256ad8 | 2395 | |
0e1862bb | 2396 | if (bfd_link_relocatable (info)) |
b34976b6 | 2397 | return TRUE; |
70256ad8 | 2398 | |
081b1afe L |
2399 | /* Don't do anything special with non-loaded, non-alloced sections. |
2400 | In particular, any relocs in such sections should not affect GOT | |
2401 | and PLT reference counting (ie. we don't allow them to create GOT | |
2402 | or PLT entries), there's no possibility or desire to optimize TLS | |
2403 | relocs, and there's not much point in propagating relocs to shared | |
2404 | libs that the dynamic linker won't relocate. */ | |
2405 | if ((sec->flags & SEC_ALLOC) == 0) | |
2406 | return TRUE; | |
2407 | ||
0ffa91dd NC |
2408 | BFD_ASSERT (is_x86_64_elf (abfd)); |
2409 | ||
351f65ca | 2410 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 | 2411 | if (htab == NULL) |
afd9acee L |
2412 | { |
2413 | sec->check_relocs_failed = 1; | |
2414 | return FALSE; | |
2415 | } | |
4dfe6ac6 | 2416 | |
bedfd056 L |
2417 | /* Get the section contents. */ |
2418 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2419 | contents = elf_section_data (sec)->this_hdr.contents; | |
2420 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2421 | { | |
2422 | sec->check_relocs_failed = 1; | |
2423 | return FALSE; | |
2424 | } | |
2425 | ||
0ffa91dd | 2426 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 2427 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 2428 | |
c434dee6 | 2429 | sreloc = NULL; |
cbe950e9 | 2430 | |
70256ad8 AJ |
2431 | rel_end = relocs + sec->reloc_count; |
2432 | for (rel = relocs; rel < rel_end; rel++) | |
2433 | { | |
bffbf940 | 2434 | unsigned int r_type; |
d42c267e | 2435 | unsigned int r_symndx; |
70256ad8 | 2436 | struct elf_link_hash_entry *h; |
aec6b87e | 2437 | struct elf_x86_64_link_hash_entry *eh; |
4c544807 L |
2438 | Elf_Internal_Sym *isym; |
2439 | const char *name; | |
06a6a421 | 2440 | bfd_boolean size_reloc; |
70256ad8 | 2441 | |
351f65ca L |
2442 | r_symndx = htab->r_sym (rel->r_info); |
2443 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
2444 | |
2445 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
2446 | { | |
695344c0 | 2447 | /* xgettext:c-format */ |
4eca0228 AM |
2448 | _bfd_error_handler (_("%B: bad symbol index: %d"), |
2449 | abfd, r_symndx); | |
afd9acee | 2450 | goto error_return; |
c434dee6 AJ |
2451 | } |
2452 | ||
70256ad8 | 2453 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
2454 | { |
2455 | /* A local symbol. */ | |
c2e61a4e L |
2456 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
2457 | abfd, r_symndx); | |
2458 | if (isym == NULL) | |
afd9acee | 2459 | goto error_return; |
c25bc9fc L |
2460 | |
2461 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 2462 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 2463 | { |
351f65ca L |
2464 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, |
2465 | TRUE); | |
c25bc9fc | 2466 | if (h == NULL) |
afd9acee | 2467 | goto error_return; |
6bbec505 | 2468 | |
c25bc9fc | 2469 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
2470 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
2471 | isym, NULL); | |
c25bc9fc L |
2472 | h->type = STT_GNU_IFUNC; |
2473 | h->def_regular = 1; | |
2474 | h->ref_regular = 1; | |
2475 | h->forced_local = 1; | |
2476 | h->root.type = bfd_link_hash_defined; | |
2477 | } | |
2478 | else | |
2479 | h = NULL; | |
2480 | } | |
70256ad8 | 2481 | else |
71cb9464 | 2482 | { |
4c544807 | 2483 | isym = NULL; |
71cb9464 L |
2484 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
2485 | while (h->root.type == bfd_link_hash_indirect | |
2486 | || h->root.type == bfd_link_hash_warning) | |
2487 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 2488 | } |
cbe950e9 | 2489 | |
d1534d16 L |
2490 | /* Check invalid x32 relocations. */ |
2491 | if (!ABI_64_P (abfd)) | |
2492 | switch (r_type) | |
2493 | { | |
2494 | default: | |
2495 | break; | |
2496 | ||
d1534d16 L |
2497 | case R_X86_64_DTPOFF64: |
2498 | case R_X86_64_TPOFF64: | |
2499 | case R_X86_64_PC64: | |
2500 | case R_X86_64_GOTOFF64: | |
2501 | case R_X86_64_GOT64: | |
2502 | case R_X86_64_GOTPCREL64: | |
2503 | case R_X86_64_GOTPC64: | |
2504 | case R_X86_64_GOTPLT64: | |
2505 | case R_X86_64_PLTOFF64: | |
2506 | { | |
2507 | if (h) | |
2508 | name = h->root.root.string; | |
2509 | else | |
2510 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
2511 | NULL); | |
4eca0228 | 2512 | _bfd_error_handler |
695344c0 | 2513 | /* xgettext:c-format */ |
d1534d16 L |
2514 | (_("%B: relocation %s against symbol `%s' isn't " |
2515 | "supported in x32 mode"), abfd, | |
2516 | x86_64_elf_howto_table[r_type].name, name); | |
2517 | bfd_set_error (bfd_error_bad_value); | |
afd9acee | 2518 | goto error_return; |
d1534d16 L |
2519 | } |
2520 | break; | |
2521 | } | |
2522 | ||
c25bc9fc L |
2523 | if (h != NULL) |
2524 | { | |
ad1e85de L |
2525 | /* It is referenced by a non-shared object. */ |
2526 | h->ref_regular = 1; | |
bc4e12de | 2527 | h->root.non_ir_ref_regular = 1; |
13a2df29 L |
2528 | |
2529 | if (h->type == STT_GNU_IFUNC) | |
2530 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
2531 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 2532 | } |
70256ad8 | 2533 | |
bedfd056 | 2534 | if (! elf_x86_64_tls_transition (info, abfd, sec, contents, |
351f65ca L |
2535 | symtab_hdr, sym_hashes, |
2536 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 2537 | rel, rel_end, h, r_symndx, FALSE)) |
afd9acee | 2538 | goto error_return; |
142411ca | 2539 | |
aec6b87e | 2540 | eh = (struct elf_x86_64_link_hash_entry *) h; |
bffbf940 | 2541 | switch (r_type) |
70256ad8 | 2542 | { |
bffbf940 JJ |
2543 | case R_X86_64_TLSLD: |
2544 | htab->tls_ld_got.refcount += 1; | |
2545 | goto create_got; | |
2546 | ||
2547 | case R_X86_64_TPOFF32: | |
0e1862bb | 2548 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
aab921ad | 2549 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2550 | &x86_64_elf_howto_table[r_type]); |
aec6b87e L |
2551 | if (eh != NULL) |
2552 | eh->has_got_reloc = 1; | |
bffbf940 | 2553 | break; |
c434dee6 | 2554 | |
bffbf940 | 2555 | case R_X86_64_GOTTPOFF: |
0e1862bb | 2556 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
2557 | info->flags |= DF_STATIC_TLS; |
2558 | /* Fall through */ | |
70256ad8 | 2559 | |
bffbf940 JJ |
2560 | case R_X86_64_GOT32: |
2561 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
2562 | case R_X86_64_GOTPCRELX: |
2563 | case R_X86_64_REX_GOTPCRELX: | |
bffbf940 | 2564 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
2565 | case R_X86_64_GOT64: |
2566 | case R_X86_64_GOTPCREL64: | |
2567 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
2568 | case R_X86_64_GOTPC32_TLSDESC: |
2569 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
2570 | /* This symbol requires a global offset table entry. */ |
2571 | { | |
2572 | int tls_type, old_tls_type; | |
2573 | ||
2574 | switch (r_type) | |
2575 | { | |
2576 | default: tls_type = GOT_NORMAL; break; | |
2577 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
2578 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
2579 | case R_X86_64_GOTPC32_TLSDESC: |
2580 | case R_X86_64_TLSDESC_CALL: | |
2581 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
2582 | } |
2583 | ||
2584 | if (h != NULL) | |
2585 | { | |
2586 | h->got.refcount += 1; | |
aec6b87e | 2587 | old_tls_type = eh->tls_type; |
bffbf940 JJ |
2588 | } |
2589 | else | |
2590 | { | |
2591 | bfd_signed_vma *local_got_refcounts; | |
2592 | ||
2593 | /* This is a global offset table entry for a local symbol. */ | |
2594 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2595 | if (local_got_refcounts == NULL) | |
2596 | { | |
2597 | bfd_size_type size; | |
2598 | ||
2599 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
2600 | size *= sizeof (bfd_signed_vma) |
2601 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
2602 | local_got_refcounts = ((bfd_signed_vma *) |
2603 | bfd_zalloc (abfd, size)); | |
2604 | if (local_got_refcounts == NULL) | |
afd9acee | 2605 | goto error_return; |
bffbf940 | 2606 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
351f65ca | 2607 | elf_x86_64_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 2608 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
351f65ca | 2609 | elf_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 2610 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
2611 | } |
2612 | local_got_refcounts[r_symndx] += 1; | |
2613 | old_tls_type | |
351f65ca | 2614 | = elf_x86_64_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
2615 | } |
2616 | ||
2617 | /* If a TLS symbol is accessed using IE at least once, | |
2618 | there is no point to use dynamic model for it. */ | |
2619 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
2620 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
2621 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 2622 | { |
67a4f2b7 | 2623 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 2624 | tls_type = old_tls_type; |
67a4f2b7 AO |
2625 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2626 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2627 | tls_type |= old_tls_type; | |
bffbf940 JJ |
2628 | else |
2629 | { | |
09a24cbf | 2630 | if (h) |
4c544807 L |
2631 | name = h->root.root.string; |
2632 | else | |
2633 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
2634 | isym, NULL); | |
4eca0228 | 2635 | _bfd_error_handler |
695344c0 | 2636 | /* xgettext:c-format */ |
63a5468a AM |
2637 | (_("%B: '%s' accessed both as normal and" |
2638 | " thread local symbol"), | |
4c544807 | 2639 | abfd, name); |
68c4a57e | 2640 | bfd_set_error (bfd_error_bad_value); |
afd9acee | 2641 | goto error_return; |
bffbf940 JJ |
2642 | } |
2643 | } | |
2644 | ||
2645 | if (old_tls_type != tls_type) | |
2646 | { | |
aec6b87e L |
2647 | if (eh != NULL) |
2648 | eh->tls_type = tls_type; | |
bffbf940 | 2649 | else |
351f65ca | 2650 | elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
2651 | } |
2652 | } | |
c434dee6 AJ |
2653 | /* Fall through */ |
2654 | ||
d6ab8113 JB |
2655 | case R_X86_64_GOTOFF64: |
2656 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2657 | case R_X86_64_GOTPC64: |
bffbf940 | 2658 | create_got: |
aec6b87e L |
2659 | if (eh != NULL) |
2660 | eh->has_got_reloc = 1; | |
70256ad8 AJ |
2661 | break; |
2662 | ||
2663 | case R_X86_64_PLT32: | |
c3320543 | 2664 | case R_X86_64_PLT32_BND: |
70256ad8 | 2665 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
2666 | actually build the entry in adjust_dynamic_symbol, |
2667 | because this might be a case of linking PIC code which is | |
2668 | never referenced by a dynamic object, in which case we | |
2669 | don't need to generate a procedure linkage table entry | |
2670 | after all. */ | |
70256ad8 AJ |
2671 | |
2672 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 2673 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
2674 | if (h == NULL) |
2675 | continue; | |
2676 | ||
aec6b87e | 2677 | eh->has_got_reloc = 1; |
f5385ebf | 2678 | h->needs_plt = 1; |
51b64d56 | 2679 | h->plt.refcount += 1; |
70256ad8 AJ |
2680 | break; |
2681 | ||
7b81dfbb AJ |
2682 | case R_X86_64_PLTOFF64: |
2683 | /* This tries to form the 'address' of a function relative | |
2684 | to GOT. For global symbols we need a PLT entry. */ | |
2685 | if (h != NULL) | |
2686 | { | |
2687 | h->needs_plt = 1; | |
2688 | h->plt.refcount += 1; | |
2689 | } | |
2690 | goto create_got; | |
2691 | ||
6a3e1bae L |
2692 | case R_X86_64_SIZE32: |
2693 | case R_X86_64_SIZE64: | |
06a6a421 | 2694 | size_reloc = TRUE; |
6a3e1bae L |
2695 | goto do_size; |
2696 | ||
248775ba L |
2697 | case R_X86_64_32: |
2698 | if (!ABI_64_P (abfd)) | |
2699 | goto pointer; | |
1a0670f3 | 2700 | /* Fall through. */ |
cc78d0af AJ |
2701 | case R_X86_64_8: |
2702 | case R_X86_64_16: | |
70256ad8 | 2703 | case R_X86_64_32S: |
338c190a L |
2704 | /* Check relocation overflow as these relocs may lead to |
2705 | run-time relocation overflow. Don't error out for | |
1b71fb54 | 2706 | sections we don't care about, such as debug sections or |
338c190a | 2707 | when relocation overflow check is disabled. */ |
4c10bbaa | 2708 | if (!info->no_reloc_overflow_check |
338c190a L |
2709 | && (bfd_link_pic (info) |
2710 | || (bfd_link_executable (info) | |
2711 | && h != NULL | |
2712 | && !h->def_regular | |
2713 | && h->def_dynamic | |
081b1afe | 2714 | && (sec->flags & SEC_READONLY) == 0))) |
aab921ad | 2715 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2716 | &x86_64_elf_howto_table[r_type]); |
1b71fb54 AJ |
2717 | /* Fall through. */ |
2718 | ||
c434dee6 AJ |
2719 | case R_X86_64_PC8: |
2720 | case R_X86_64_PC16: | |
70256ad8 | 2721 | case R_X86_64_PC32: |
c3320543 | 2722 | case R_X86_64_PC32_BND: |
d6ab8113 | 2723 | case R_X86_64_PC64: |
1b71fb54 | 2724 | case R_X86_64_64: |
248775ba | 2725 | pointer: |
aec6b87e L |
2726 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
2727 | eh->has_non_got_reloc = 1; | |
bf52d7c7 L |
2728 | /* We are called after all symbols have been resolved. Only |
2729 | relocation against STT_GNU_IFUNC symbol must go through | |
2730 | PLT. */ | |
d1ed1c7d L |
2731 | if (h != NULL |
2732 | && (bfd_link_executable (info) | |
bf52d7c7 | 2733 | || h->type == STT_GNU_IFUNC)) |
c434dee6 AJ |
2734 | { |
2735 | /* If this reloc is in a read-only section, we might | |
2736 | need a copy reloc. We can't check reliably at this | |
2737 | stage whether the section is read-only, as input | |
2738 | sections have not yet been mapped to output sections. | |
2739 | Tentatively set the flag for now, and correct in | |
2740 | adjust_dynamic_symbol. */ | |
f5385ebf | 2741 | h->non_got_ref = 1; |
c434dee6 | 2742 | |
233cc9c1 L |
2743 | /* We may need a .plt entry if the symbol is a function |
2744 | defined in a shared lib or is a STT_GNU_IFUNC function | |
2745 | referenced from the code or read-only section. */ | |
34bb2571 L |
2746 | if (!h->def_regular |
2747 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
233cc9c1 L |
2748 | h->plt.refcount += 1; |
2749 | ||
5db4f0d3 L |
2750 | if (r_type == R_X86_64_PC32) |
2751 | { | |
2752 | /* Since something like ".long foo - ." may be used | |
2753 | as pointer, make sure that PLT is used if foo is | |
2754 | a function defined in a shared library. */ | |
2755 | if ((sec->flags & SEC_CODE) == 0) | |
2756 | h->pointer_equality_needed = 1; | |
2757 | } | |
2758 | else if (r_type != R_X86_64_PC32_BND | |
2759 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
2760 | { |
2761 | h->pointer_equality_needed = 1; | |
2762 | /* At run-time, R_X86_64_64 can be resolved for both | |
2763 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
2764 | can only be resolved for x32. */ | |
2765 | if ((sec->flags & SEC_READONLY) == 0 | |
2766 | && (r_type == R_X86_64_64 | |
2767 | || (!ABI_64_P (abfd) | |
2768 | && (r_type == R_X86_64_32 | |
2769 | || r_type == R_X86_64_32S)))) | |
aec6b87e | 2770 | eh->func_pointer_refcount += 1; |
04ebc307 | 2771 | } |
c434dee6 | 2772 | } |
70256ad8 | 2773 | |
06a6a421 | 2774 | size_reloc = FALSE; |
6a3e1bae | 2775 | do_size: |
70256ad8 AJ |
2776 | /* If we are creating a shared library, and this is a reloc |
2777 | against a global symbol, or a non PC relative reloc | |
2778 | against a local symbol, then we need to copy the reloc | |
2779 | into the shared library. However, if we are linking with | |
2780 | -Bsymbolic, we do not need to copy a reloc against a | |
2781 | global symbol which is defined in an object we are | |
407443a3 | 2782 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
2783 | this point we have not seen all the input files, so it is |
2784 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
2785 | later (it is never cleared). In case of a weak definition, |
2786 | DEF_REGULAR may be cleared later by a strong definition in | |
2787 | a shared library. We account for that possibility below by | |
2788 | storing information in the relocs_copied field of the hash | |
2789 | table entry. A similar situation occurs when creating | |
2790 | shared libraries and symbol visibility changes render the | |
31c0ebfe | 2791 | symbol local. |
c434dee6 AJ |
2792 | |
2793 | If on the other hand, we are creating an executable, we | |
2794 | may need to keep relocations for symbols satisfied by a | |
2795 | dynamic library if we manage to avoid copy relocs for the | |
233cc9c1 L |
2796 | symbol. |
2797 | ||
2798 | Generate dynamic pointer relocation against STT_GNU_IFUNC | |
2799 | symbol in the non-code section. */ | |
081b1afe L |
2800 | if ((bfd_link_pic (info) |
2801 | && (! IS_X86_64_PCREL_TYPE (r_type) | |
2802 | || (h != NULL | |
2803 | && (! (bfd_link_pie (info) | |
2804 | || SYMBOLIC_BIND (info, h)) | |
2805 | || h->root.type == bfd_link_hash_defweak | |
2806 | || !h->def_regular)))) | |
233cc9c1 L |
2807 | || (h != NULL |
2808 | && h->type == STT_GNU_IFUNC | |
2809 | && r_type == htab->pointer_r_type | |
2810 | && (sec->flags & SEC_CODE) == 0) | |
081b1afe L |
2811 | || (ELIMINATE_COPY_RELOCS |
2812 | && !bfd_link_pic (info) | |
2813 | && h != NULL | |
2814 | && (h->root.type == bfd_link_hash_defweak | |
2815 | || !h->def_regular))) | |
70256ad8 | 2816 | { |
e03a8ed8 L |
2817 | struct elf_dyn_relocs *p; |
2818 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2819 | |
2820 | /* We must copy these reloc types into the output file. | |
2821 | Create a reloc section in dynobj and make room for | |
2822 | this reloc. */ | |
70256ad8 AJ |
2823 | if (sreloc == NULL) |
2824 | { | |
83bac4b0 | 2825 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
2826 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
2827 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 2828 | |
70256ad8 | 2829 | if (sreloc == NULL) |
afd9acee | 2830 | goto error_return; |
70256ad8 AJ |
2831 | } |
2832 | ||
c434dee6 AJ |
2833 | /* If this is a global symbol, we count the number of |
2834 | relocations we need for this symbol. */ | |
2835 | if (h != NULL) | |
aec6b87e | 2836 | head = &eh->dyn_relocs; |
c434dee6 AJ |
2837 | else |
2838 | { | |
2839 | /* Track dynamic relocs needed for local syms too. | |
2840 | We really need local syms available to do this | |
2841 | easily. Oh well. */ | |
c434dee6 | 2842 | asection *s; |
87d72d41 | 2843 | void **vpp; |
87d72d41 AM |
2844 | |
2845 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2846 | abfd, r_symndx); | |
2847 | if (isym == NULL) | |
afd9acee | 2848 | goto error_return; |
87d72d41 AM |
2849 | |
2850 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2851 | if (s == NULL) |
87d72d41 | 2852 | s = sec; |
70256ad8 | 2853 | |
e81d3500 DD |
2854 | /* Beware of type punned pointers vs strict aliasing |
2855 | rules. */ | |
2856 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2857 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2858 | } |
70256ad8 | 2859 | |
c434dee6 AJ |
2860 | p = *head; |
2861 | if (p == NULL || p->sec != sec) | |
2862 | { | |
2863 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 2864 | |
e03a8ed8 | 2865 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2866 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2867 | if (p == NULL) |
afd9acee | 2868 | goto error_return; |
c434dee6 AJ |
2869 | p->next = *head; |
2870 | *head = p; | |
2871 | p->sec = sec; | |
2872 | p->count = 0; | |
2873 | p->pc_count = 0; | |
70256ad8 | 2874 | } |
c434dee6 AJ |
2875 | |
2876 | p->count += 1; | |
06a6a421 L |
2877 | /* Count size relocation as PC-relative relocation. */ |
2878 | if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc) | |
c434dee6 | 2879 | p->pc_count += 1; |
70256ad8 AJ |
2880 | } |
2881 | break; | |
fe4770f4 AJ |
2882 | |
2883 | /* This relocation describes the C++ object vtable hierarchy. | |
2884 | Reconstruct it for later use during GC. */ | |
2885 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2886 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
afd9acee | 2887 | goto error_return; |
fe4770f4 AJ |
2888 | break; |
2889 | ||
2890 | /* This relocation describes which C++ vtable entries are actually | |
2891 | used. Record for later use during GC. */ | |
2892 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
2893 | BFD_ASSERT (h != NULL); |
2894 | if (h != NULL | |
2895 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
afd9acee | 2896 | goto error_return; |
fe4770f4 | 2897 | break; |
c434dee6 AJ |
2898 | |
2899 | default: | |
2900 | break; | |
70256ad8 | 2901 | } |
dd7e64d4 | 2902 | |
56ceb5b5 L |
2903 | if ((r_type == R_X86_64_GOTPCREL |
2904 | || r_type == R_X86_64_GOTPCRELX | |
2905 | || r_type == R_X86_64_REX_GOTPCRELX) | |
c1d11331 | 2906 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
56ceb5b5 | 2907 | sec->need_convert_load = 1; |
70256ad8 AJ |
2908 | } |
2909 | ||
bedfd056 L |
2910 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2911 | { | |
2912 | if (!info->keep_memory) | |
2913 | free (contents); | |
2914 | else | |
2915 | { | |
2916 | /* Cache the section contents for elf_link_input_bfd. */ | |
2917 | elf_section_data (sec)->this_hdr.contents = contents; | |
2918 | } | |
2919 | } | |
2920 | ||
b34976b6 | 2921 | return TRUE; |
afd9acee L |
2922 | |
2923 | error_return: | |
bedfd056 L |
2924 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2925 | free (contents); | |
afd9acee L |
2926 | sec->check_relocs_failed = 1; |
2927 | return FALSE; | |
70256ad8 AJ |
2928 | } |
2929 | ||
2930 | /* Return the section that should be marked against GC for a given | |
407443a3 | 2931 | relocation. */ |
70256ad8 AJ |
2932 | |
2933 | static asection * | |
351f65ca L |
2934 | elf_x86_64_gc_mark_hook (asection *sec, |
2935 | struct bfd_link_info *info, | |
2936 | Elf_Internal_Rela *rel, | |
2937 | struct elf_link_hash_entry *h, | |
2938 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
2939 | { |
2940 | if (h != NULL) | |
351f65ca | 2941 | switch (ELF32_R_TYPE (rel->r_info)) |
07adf181 AM |
2942 | { |
2943 | case R_X86_64_GNU_VTINHERIT: | |
2944 | case R_X86_64_GNU_VTENTRY: | |
2945 | return NULL; | |
2946 | } | |
2947 | ||
2948 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
2949 | } |
2950 | ||
aec6b87e L |
2951 | /* Remove undefined weak symbol from the dynamic symbol table if it |
2952 | is resolved to 0. */ | |
2953 | ||
2954 | static bfd_boolean | |
2955 | elf_x86_64_fixup_symbol (struct bfd_link_info *info, | |
2956 | struct elf_link_hash_entry *h) | |
2957 | { | |
2958 | if (h->dynindx != -1 | |
2959 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, | |
e62b9723 | 2960 | elf_x86_64_hash_entry (h)->has_got_reloc, |
aec6b87e L |
2961 | elf_x86_64_hash_entry (h))) |
2962 | { | |
2963 | h->dynindx = -1; | |
2964 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
2965 | h->dynstr_index); | |
2966 | } | |
2967 | return TRUE; | |
2968 | } | |
2969 | ||
70256ad8 AJ |
2970 | /* Adjust a symbol defined by a dynamic object and referenced by a |
2971 | regular object. The current definition is in some section of the | |
2972 | dynamic object, but we're not including those sections. We have to | |
2973 | change the definition to something the rest of the link can | |
407443a3 | 2974 | understand. */ |
70256ad8 | 2975 | |
b34976b6 | 2976 | static bfd_boolean |
351f65ca L |
2977 | elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
2978 | struct elf_link_hash_entry *h) | |
70256ad8 | 2979 | { |
351f65ca | 2980 | struct elf_x86_64_link_hash_table *htab; |
5474d94f | 2981 | asection *s, *srel; |
5ca5bb35 L |
2982 | struct elf_x86_64_link_hash_entry *eh; |
2983 | struct elf_dyn_relocs *p; | |
70256ad8 | 2984 | |
cbe950e9 L |
2985 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2986 | if (h->type == STT_GNU_IFUNC) | |
2987 | { | |
73bcf233 L |
2988 | /* All local STT_GNU_IFUNC references must be treate as local |
2989 | calls via local PLT. */ | |
5ca5bb35 L |
2990 | if (h->ref_regular |
2991 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2992 | { | |
73bcf233 | 2993 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2994 | struct elf_dyn_relocs **pp; |
2995 | ||
2996 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2997 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2998 | { | |
2999 | pc_count += p->pc_count; | |
3000 | p->count -= p->pc_count; | |
3001 | p->pc_count = 0; | |
73bcf233 | 3002 | count += p->count; |
5ca5bb35 L |
3003 | if (p->count == 0) |
3004 | *pp = p->next; | |
3005 | else | |
3006 | pp = &p->next; | |
3007 | } | |
3008 | ||
73bcf233 | 3009 | if (pc_count || count) |
5ca5bb35 | 3010 | { |
5ca5bb35 | 3011 | h->non_got_ref = 1; |
233cc9c1 L |
3012 | if (pc_count) |
3013 | { | |
3014 | /* Increment PLT reference count only for PC-relative | |
3015 | references. */ | |
3016 | h->needs_plt = 1; | |
3017 | if (h->plt.refcount <= 0) | |
3018 | h->plt.refcount = 1; | |
3019 | else | |
3020 | h->plt.refcount += 1; | |
3021 | } | |
5ca5bb35 L |
3022 | } |
3023 | } | |
3024 | ||
cbe950e9 L |
3025 | if (h->plt.refcount <= 0) |
3026 | { | |
3027 | h->plt.offset = (bfd_vma) -1; | |
3028 | h->needs_plt = 0; | |
3029 | } | |
3030 | return TRUE; | |
3031 | } | |
3032 | ||
70256ad8 AJ |
3033 | /* If this is a function, put it in the procedure linkage table. We |
3034 | will fill in the contents of the procedure linkage table later, | |
3035 | when we know the address of the .got section. */ | |
3036 | if (h->type == STT_FUNC | |
f5385ebf | 3037 | || h->needs_plt) |
70256ad8 | 3038 | { |
c434dee6 | 3039 | if (h->plt.refcount <= 0 |
27482721 AJ |
3040 | || SYMBOL_CALLS_LOCAL (info, h) |
3041 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
3042 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 3043 | { |
70256ad8 AJ |
3044 | /* This case can occur if we saw a PLT32 reloc in an input |
3045 | file, but the symbol was never referred to by a dynamic | |
3046 | object, or if all references were garbage collected. In | |
3047 | such a case, we don't actually need to build a procedure | |
3048 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 3049 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 3050 | h->needs_plt = 0; |
70256ad8 AJ |
3051 | } |
3052 | ||
b34976b6 | 3053 | return TRUE; |
70256ad8 | 3054 | } |
bbd7ec4a | 3055 | else |
c434dee6 AJ |
3056 | /* It's possible that we incorrectly decided a .plt reloc was |
3057 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
3058 | check_relocs. We can't decide accurately between function and | |
3059 | non-function syms in check-relocs; Objects loaded later in | |
3060 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 3061 | h->plt.offset = (bfd_vma) -1; |
70256ad8 | 3062 | |
a5b4ee94 L |
3063 | eh = (struct elf_x86_64_link_hash_entry *) h; |
3064 | ||
70256ad8 AJ |
3065 | /* If this is a weak symbol, and there is a real definition, the |
3066 | processor independent code will have arranged for us to see the | |
407443a3 | 3067 | real definition first, and we can just use the same value. */ |
f6e332e6 | 3068 | if (h->u.weakdef != NULL) |
70256ad8 | 3069 | { |
f6e332e6 AM |
3070 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
3071 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
3072 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
3073 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
a5b4ee94 L |
3074 | if (ELIMINATE_COPY_RELOCS |
3075 | || info->nocopyreloc | |
3076 | || SYMBOL_NO_COPYRELOC (info, eh)) | |
bc696fd5 | 3077 | { |
bc696fd5 L |
3078 | h->non_got_ref = h->u.weakdef->non_got_ref; |
3079 | eh->needs_copy = h->u.weakdef->needs_copy; | |
3080 | } | |
b34976b6 | 3081 | return TRUE; |
70256ad8 AJ |
3082 | } |
3083 | ||
3084 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 3085 | is not a function. */ |
70256ad8 AJ |
3086 | |
3087 | /* If we are creating a shared library, we must presume that the | |
3088 | only references to the symbol are via the global offset table. | |
3089 | For such cases we need not do anything here; the relocations will | |
407443a3 | 3090 | be handled correctly by relocate_section. */ |
0e1862bb | 3091 | if (!bfd_link_executable (info)) |
b34976b6 | 3092 | return TRUE; |
70256ad8 AJ |
3093 | |
3094 | /* If there are no references to this symbol that do not use the | |
3095 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 3096 | if (!h->non_got_ref) |
b34976b6 | 3097 | return TRUE; |
70256ad8 | 3098 | |
c434dee6 | 3099 | /* If -z nocopyreloc was given, we won't generate them either. */ |
a5b4ee94 | 3100 | if (info->nocopyreloc || SYMBOL_NO_COPYRELOC (info, eh)) |
c434dee6 | 3101 | { |
f5385ebf | 3102 | h->non_got_ref = 0; |
b34976b6 | 3103 | return TRUE; |
c434dee6 AJ |
3104 | } |
3105 | ||
31c0ebfe | 3106 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 3107 | { |
351f65ca | 3108 | eh = (struct elf_x86_64_link_hash_entry *) h; |
d40d037c AJ |
3109 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
3110 | { | |
3111 | s = p->sec->output_section; | |
3112 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
3113 | break; | |
3114 | } | |
3115 | ||
3116 | /* If we didn't find any dynamic relocs in read-only sections, then | |
3117 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
3118 | if (p == NULL) | |
3119 | { | |
f5385ebf | 3120 | h->non_got_ref = 0; |
d40d037c AJ |
3121 | return TRUE; |
3122 | } | |
c434dee6 AJ |
3123 | } |
3124 | ||
70256ad8 | 3125 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 3126 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
3127 | an entry for this symbol in the .dynsym section. The dynamic |
3128 | object will contain position independent code, so all references | |
3129 | from the dynamic object to this symbol will go through the global | |
3130 | offset table. The dynamic linker will use the .dynsym entry to | |
3131 | determine the address it must put in the global offset table, so | |
3132 | both the dynamic object and the regular object will refer to the | |
3133 | same memory location for the variable. */ | |
3134 | ||
351f65ca | 3135 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3136 | if (htab == NULL) |
3137 | return FALSE; | |
70256ad8 AJ |
3138 | |
3139 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
3140 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 3141 | runtime process image. */ |
5474d94f AM |
3142 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
3143 | { | |
3144 | s = htab->elf.sdynrelro; | |
3145 | srel = htab->elf.sreldynrelro; | |
3146 | } | |
3147 | else | |
3148 | { | |
3149 | s = htab->elf.sdynbss; | |
3150 | srel = htab->elf.srelbss; | |
3151 | } | |
1d7e9d18 | 3152 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
70256ad8 | 3153 | { |
351f65ca L |
3154 | const struct elf_backend_data *bed; |
3155 | bed = get_elf_backend_data (info->output_bfd); | |
5474d94f | 3156 | srel->size += bed->s->sizeof_rela; |
f5385ebf | 3157 | h->needs_copy = 1; |
70256ad8 AJ |
3158 | } |
3159 | ||
6cabe1ea | 3160 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
70256ad8 AJ |
3161 | } |
3162 | ||
c434dee6 AJ |
3163 | /* Allocate space in .plt, .got and associated reloc sections for |
3164 | dynamic relocs. */ | |
3165 | ||
b34976b6 | 3166 | static bfd_boolean |
351f65ca | 3167 | elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
3168 | { |
3169 | struct bfd_link_info *info; | |
351f65ca L |
3170 | struct elf_x86_64_link_hash_table *htab; |
3171 | struct elf_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 3172 | struct elf_dyn_relocs *p; |
351f65ca | 3173 | const struct elf_backend_data *bed; |
eed180f8 | 3174 | unsigned int plt_entry_size; |
aec6b87e | 3175 | bfd_boolean resolved_to_zero; |
c434dee6 | 3176 | |
e92d460e | 3177 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 3178 | return TRUE; |
c434dee6 | 3179 | |
351f65ca | 3180 | eh = (struct elf_x86_64_link_hash_entry *) h; |
e92d460e | 3181 | |
c434dee6 | 3182 | info = (struct bfd_link_info *) inf; |
351f65ca | 3183 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3184 | if (htab == NULL) |
3185 | return FALSE; | |
351f65ca | 3186 | bed = get_elf_backend_data (info->output_bfd); |
38b12349 | 3187 | plt_entry_size = htab->plt.plt_entry_size; |
c434dee6 | 3188 | |
e62b9723 L |
3189 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
3190 | eh->has_got_reloc, | |
3191 | eh); | |
aec6b87e | 3192 | |
dd7e64d4 L |
3193 | /* We can't use the GOT PLT if pointer equality is needed since |
3194 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
3195 | linker won't update the GOT slot. We will get into an infinite | |
3196 | loop at run-time. */ | |
3197 | if (htab->plt_got != NULL | |
3198 | && h->type != STT_GNU_IFUNC | |
3199 | && !h->pointer_equality_needed | |
3200 | && h->plt.refcount > 0 | |
3201 | && h->got.refcount > 0) | |
3202 | { | |
3203 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
3204 | reloctions. */ | |
3205 | h->plt.offset = (bfd_vma) -1; | |
3206 | ||
3207 | /* Use the GOT PLT. */ | |
3208 | eh->plt_got.refcount = 1; | |
3209 | } | |
3210 | ||
04ebc307 L |
3211 | /* Clear the reference count of function pointer relocations if |
3212 | symbol isn't a normal function. */ | |
3213 | if (h->type != STT_FUNC) | |
3214 | eh->func_pointer_refcount = 0; | |
3215 | ||
cbe950e9 L |
3216 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
3217 | here if it is defined and referenced in a non-shared object. */ | |
3218 | if (h->type == STT_GNU_IFUNC | |
3219 | && h->def_regular) | |
0ff2b86e L |
3220 | { |
3221 | if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, | |
3222 | &eh->dyn_relocs, | |
2df3368d | 3223 | &htab->readonly_dynrelocs_against_ifunc, |
0ff2b86e | 3224 | plt_entry_size, |
38b12349 L |
3225 | (htab->plt.has_plt0 |
3226 | * plt_entry_size), | |
233cc9c1 | 3227 | GOT_ENTRY_SIZE, TRUE)) |
0ff2b86e | 3228 | { |
f2c29a16 | 3229 | asection *s = htab->plt_second; |
0ff2b86e L |
3230 | if (h->plt.offset != (bfd_vma) -1 && s != NULL) |
3231 | { | |
f2c29a16 L |
3232 | /* Use the second PLT section if it is created. */ |
3233 | eh->plt_second.offset = s->size; | |
0ff2b86e | 3234 | |
f2c29a16 | 3235 | /* Make room for this entry in the second PLT section. */ |
38b12349 | 3236 | s->size += htab->non_lazy_plt->plt_entry_size; |
0ff2b86e L |
3237 | } |
3238 | ||
3239 | return TRUE; | |
3240 | } | |
3241 | else | |
3242 | return FALSE; | |
3243 | } | |
04ebc307 L |
3244 | /* Don't create the PLT entry if there are only function pointer |
3245 | relocations which can be resolved at run-time. */ | |
cbe950e9 | 3246 | else if (htab->elf.dynamic_sections_created |
04ebc307 L |
3247 | && (h->plt.refcount > eh->func_pointer_refcount |
3248 | || eh->plt_got.refcount > 0)) | |
c434dee6 | 3249 | { |
dc2be3d2 | 3250 | bfd_boolean use_plt_got = eh->plt_got.refcount > 0; |
25070364 | 3251 | |
04ebc307 L |
3252 | /* Clear the reference count of function pointer relocations |
3253 | if PLT is used. */ | |
3254 | eh->func_pointer_refcount = 0; | |
3255 | ||
c434dee6 AJ |
3256 | /* Make sure this symbol is output as a dynamic symbol. |
3257 | Undefined weak syms won't yet be marked as dynamic. */ | |
3258 | if (h->dynindx == -1 | |
aec6b87e | 3259 | && !h->forced_local |
9e9821dd L |
3260 | && !resolved_to_zero |
3261 | && h->root.type == bfd_link_hash_undefweak) | |
c434dee6 | 3262 | { |
c152c796 | 3263 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 3264 | return FALSE; |
c434dee6 AJ |
3265 | } |
3266 | ||
0e1862bb | 3267 | if (bfd_link_pic (info) |
27482721 | 3268 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
c434dee6 | 3269 | { |
6de2ae4a | 3270 | asection *s = htab->elf.splt; |
f2c29a16 | 3271 | asection *second_s = htab->plt_second; |
dd7e64d4 | 3272 | asection *got_s = htab->plt_got; |
c434dee6 | 3273 | |
7c1e8d3e L |
3274 | /* If this is the first .plt entry, make room for the special |
3275 | first entry. The .plt section is used by prelink to undo | |
3276 | prelinking for dynamic relocations. */ | |
3277 | if (s->size == 0) | |
38b12349 | 3278 | s->size = htab->plt.has_plt0 * plt_entry_size; |
7c1e8d3e | 3279 | |
dd7e64d4 L |
3280 | if (use_plt_got) |
3281 | eh->plt_got.offset = got_s->size; | |
3282 | else | |
3283 | { | |
3284 | h->plt.offset = s->size; | |
f2c29a16 L |
3285 | if (second_s) |
3286 | eh->plt_second.offset = second_s->size; | |
dd7e64d4 | 3287 | } |
c434dee6 AJ |
3288 | |
3289 | /* If this symbol is not defined in a regular file, and we are | |
3290 | not generating a shared library, then set the symbol to this | |
3291 | location in the .plt. This is required to make function | |
3292 | pointers compare as equal between the normal executable and | |
3293 | the shared library. */ | |
0e1862bb | 3294 | if (! bfd_link_pic (info) |
f5385ebf | 3295 | && !h->def_regular) |
c434dee6 | 3296 | { |
dd7e64d4 | 3297 | if (use_plt_got) |
0ff2b86e | 3298 | { |
dd7e64d4 L |
3299 | /* We need to make a call to the entry of the GOT PLT |
3300 | instead of regular PLT entry. */ | |
3301 | h->root.u.def.section = got_s; | |
3302 | h->root.u.def.value = eh->plt_got.offset; | |
0ff2b86e L |
3303 | } |
3304 | else | |
3305 | { | |
f2c29a16 | 3306 | if (second_s) |
dd7e64d4 | 3307 | { |
f2c29a16 L |
3308 | /* We need to make a call to the entry of the |
3309 | second PLT instead of regular PLT entry. */ | |
3310 | h->root.u.def.section = second_s; | |
3311 | h->root.u.def.value = eh->plt_second.offset; | |
dd7e64d4 L |
3312 | } |
3313 | else | |
3314 | { | |
3315 | h->root.u.def.section = s; | |
3316 | h->root.u.def.value = h->plt.offset; | |
3317 | } | |
0ff2b86e | 3318 | } |
c434dee6 AJ |
3319 | } |
3320 | ||
3321 | /* Make room for this entry. */ | |
dd7e64d4 | 3322 | if (use_plt_got) |
38b12349 | 3323 | got_s->size += htab->non_lazy_plt->plt_entry_size; |
dd7e64d4 L |
3324 | else |
3325 | { | |
3326 | s->size += plt_entry_size; | |
f2c29a16 L |
3327 | if (second_s) |
3328 | second_s->size += htab->non_lazy_plt->plt_entry_size; | |
c434dee6 | 3329 | |
dd7e64d4 L |
3330 | /* We also need to make an entry in the .got.plt section, |
3331 | which will be placed in the .got section by the linker | |
3332 | script. */ | |
3333 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; | |
c434dee6 | 3334 | |
aec6b87e L |
3335 | /* There should be no PLT relocation against resolved |
3336 | undefined weak symbol in executable. */ | |
3337 | if (!resolved_to_zero) | |
3338 | { | |
3339 | /* We also need to make an entry in the .rela.plt | |
3340 | section. */ | |
3341 | htab->elf.srelplt->size += bed->s->sizeof_rela; | |
3342 | htab->elf.srelplt->reloc_count++; | |
3343 | } | |
dd7e64d4 | 3344 | } |
c434dee6 AJ |
3345 | } |
3346 | else | |
3347 | { | |
13f42277 | 3348 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 3349 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 3350 | h->needs_plt = 0; |
c434dee6 AJ |
3351 | } |
3352 | } | |
3353 | else | |
3354 | { | |
13f42277 | 3355 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 3356 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 3357 | h->needs_plt = 0; |
c434dee6 AJ |
3358 | } |
3359 | ||
67a4f2b7 AO |
3360 | eh->tlsdesc_got = (bfd_vma) -1; |
3361 | ||
bffbf940 JJ |
3362 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
3363 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
3364 | if (h->got.refcount > 0 | |
0e1862bb | 3365 | && bfd_link_executable (info) |
bffbf940 | 3366 | && h->dynindx == -1 |
351f65ca | 3367 | && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) |
d8045f23 NC |
3368 | { |
3369 | h->got.offset = (bfd_vma) -1; | |
3370 | } | |
bffbf940 | 3371 | else if (h->got.refcount > 0) |
c434dee6 AJ |
3372 | { |
3373 | asection *s; | |
b34976b6 | 3374 | bfd_boolean dyn; |
351f65ca | 3375 | int tls_type = elf_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
3376 | |
3377 | /* Make sure this symbol is output as a dynamic symbol. | |
3378 | Undefined weak syms won't yet be marked as dynamic. */ | |
3379 | if (h->dynindx == -1 | |
aec6b87e | 3380 | && !h->forced_local |
9e9821dd L |
3381 | && !resolved_to_zero |
3382 | && h->root.type == bfd_link_hash_undefweak) | |
c434dee6 | 3383 | { |
c152c796 | 3384 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 3385 | return FALSE; |
c434dee6 AJ |
3386 | } |
3387 | ||
67a4f2b7 AO |
3388 | if (GOT_TLS_GDESC_P (tls_type)) |
3389 | { | |
6de2ae4a | 3390 | eh->tlsdesc_got = htab->elf.sgotplt->size |
351f65ca | 3391 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 3392 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
3393 | h->got.offset = (bfd_vma) -2; |
3394 | } | |
3395 | if (! GOT_TLS_GDESC_P (tls_type) | |
3396 | || GOT_TLS_GD_P (tls_type)) | |
3397 | { | |
6de2ae4a | 3398 | s = htab->elf.sgot; |
67a4f2b7 AO |
3399 | h->got.offset = s->size; |
3400 | s->size += GOT_ENTRY_SIZE; | |
3401 | if (GOT_TLS_GD_P (tls_type)) | |
3402 | s->size += GOT_ENTRY_SIZE; | |
3403 | } | |
c434dee6 | 3404 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 | 3405 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
aec6b87e L |
3406 | and two if global. R_X86_64_GOTTPOFF needs one dynamic |
3407 | relocation. No dynamic relocation against resolved undefined | |
3408 | weak symbol in executable. */ | |
67a4f2b7 | 3409 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 3410 | || tls_type == GOT_TLS_IE) |
351f65ca | 3411 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 | 3412 | else if (GOT_TLS_GD_P (tls_type)) |
351f65ca | 3413 | htab->elf.srelgot->size += 2 * bed->s->sizeof_rela; |
67a4f2b7 | 3414 | else if (! GOT_TLS_GDESC_P (tls_type) |
aec6b87e L |
3415 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
3416 | && !resolved_to_zero) | |
67a4f2b7 | 3417 | || h->root.type != bfd_link_hash_undefweak) |
0e1862bb | 3418 | && (bfd_link_pic (info) |
27482721 | 3419 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
351f65ca | 3420 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
3421 | if (GOT_TLS_GDESC_P (tls_type)) |
3422 | { | |
351f65ca | 3423 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
3424 | htab->tlsdesc_plt = (bfd_vma) -1; |
3425 | } | |
c434dee6 AJ |
3426 | } |
3427 | else | |
3428 | h->got.offset = (bfd_vma) -1; | |
3429 | ||
c434dee6 | 3430 | if (eh->dyn_relocs == NULL) |
b34976b6 | 3431 | return TRUE; |
c434dee6 AJ |
3432 | |
3433 | /* In the shared -Bsymbolic case, discard space allocated for | |
3434 | dynamic pc-relative relocs against symbols which turn out to be | |
3435 | defined in regular objects. For the normal shared case, discard | |
3436 | space for pc-relative relocs that have become local due to symbol | |
3437 | visibility changes. */ | |
3438 | ||
0e1862bb | 3439 | if (bfd_link_pic (info)) |
c434dee6 | 3440 | { |
27482721 AJ |
3441 | /* Relocs that use pc_count are those that appear on a call |
3442 | insn, or certain REL relocs that can generated via assembly. | |
3443 | We want calls to protected symbols to resolve directly to the | |
3444 | function rather than going via the plt. If people want | |
3445 | function pointer comparisons to work as expected then they | |
3446 | should avoid writing weird assembly. */ | |
3447 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 3448 | { |
e03a8ed8 | 3449 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
3450 | |
3451 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
3452 | { | |
c3ce498c L |
3453 | p->count -= p->pc_count; |
3454 | p->pc_count = 0; | |
c434dee6 AJ |
3455 | if (p->count == 0) |
3456 | *pp = p->next; | |
3457 | else | |
3458 | pp = &p->next; | |
3459 | } | |
3460 | } | |
4e795f50 AM |
3461 | |
3462 | /* Also discard relocs on undefined weak syms with non-default | |
aec6b87e | 3463 | visibility or in PIE. */ |
31c0ebfe | 3464 | if (eh->dyn_relocs != NULL) |
22d606e9 | 3465 | { |
31c0ebfe L |
3466 | if (h->root.type == bfd_link_hash_undefweak) |
3467 | { | |
aec6b87e L |
3468 | /* Undefined weak symbol is never bound locally in shared |
3469 | library. */ | |
3470 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
3471 | || resolved_to_zero) | |
31c0ebfe | 3472 | eh->dyn_relocs = NULL; |
31c0ebfe L |
3473 | else if (h->dynindx == -1 |
3474 | && ! h->forced_local | |
3475 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
3476 | return FALSE; | |
3477 | } | |
9d1d54d5 L |
3478 | /* For PIE, discard space for pc-relative relocs against |
3479 | symbols which turn out to need copy relocs. */ | |
0e1862bb | 3480 | else if (bfd_link_executable (info) |
bc696fd5 | 3481 | && (h->needs_copy || eh->needs_copy) |
31c0ebfe L |
3482 | && h->def_dynamic |
3483 | && !h->def_regular) | |
9d1d54d5 L |
3484 | { |
3485 | struct elf_dyn_relocs **pp; | |
3486 | ||
3487 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
3488 | { | |
3489 | if (p->pc_count != 0) | |
3490 | *pp = p->next; | |
3491 | else | |
3492 | pp = &p->next; | |
3493 | } | |
3494 | } | |
22d606e9 | 3495 | } |
d8045f23 | 3496 | } |
d40d037c | 3497 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
3498 | { |
3499 | /* For the non-shared case, discard space for relocs against | |
3500 | symbols which turn out to need copy relocs or are not | |
04ebc307 L |
3501 | dynamic. Keep dynamic relocations for run-time function |
3502 | pointer initialization. */ | |
c434dee6 | 3503 | |
aec6b87e L |
3504 | if ((!h->non_got_ref |
3505 | || eh->func_pointer_refcount > 0 | |
3506 | || (h->root.type == bfd_link_hash_undefweak | |
3507 | && !resolved_to_zero)) | |
f5385ebf AM |
3508 | && ((h->def_dynamic |
3509 | && !h->def_regular) | |
c434dee6 AJ |
3510 | || (htab->elf.dynamic_sections_created |
3511 | && (h->root.type == bfd_link_hash_undefweak | |
3512 | || h->root.type == bfd_link_hash_undefined)))) | |
3513 | { | |
3514 | /* Make sure this symbol is output as a dynamic symbol. | |
3515 | Undefined weak syms won't yet be marked as dynamic. */ | |
3516 | if (h->dynindx == -1 | |
d8045f23 | 3517 | && ! h->forced_local |
aec6b87e | 3518 | && ! resolved_to_zero |
9e9821dd | 3519 | && h->root.type == bfd_link_hash_undefweak |
d8045f23 NC |
3520 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
3521 | return FALSE; | |
c434dee6 AJ |
3522 | |
3523 | /* If that succeeded, we know we'll be keeping all the | |
3524 | relocs. */ | |
3525 | if (h->dynindx != -1) | |
3526 | goto keep; | |
3527 | } | |
3528 | ||
3529 | eh->dyn_relocs = NULL; | |
04ebc307 | 3530 | eh->func_pointer_refcount = 0; |
c434dee6 AJ |
3531 | |
3532 | keep: ; | |
3533 | } | |
3534 | ||
3535 | /* Finally, allocate space. */ | |
3536 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
3537 | { | |
e7c33416 NC |
3538 | asection * sreloc; |
3539 | ||
cbe950e9 | 3540 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
3541 | |
3542 | BFD_ASSERT (sreloc != NULL); | |
3543 | ||
351f65ca | 3544 | sreloc->size += p->count * bed->s->sizeof_rela; |
c434dee6 AJ |
3545 | } |
3546 | ||
b34976b6 | 3547 | return TRUE; |
c434dee6 AJ |
3548 | } |
3549 | ||
c25bc9fc L |
3550 | /* Allocate space in .plt, .got and associated reloc sections for |
3551 | local dynamic relocs. */ | |
3552 | ||
3553 | static bfd_boolean | |
351f65ca | 3554 | elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf) |
c25bc9fc L |
3555 | { |
3556 | struct elf_link_hash_entry *h | |
3557 | = (struct elf_link_hash_entry *) *slot; | |
3558 | ||
3559 | if (h->type != STT_GNU_IFUNC | |
3560 | || !h->def_regular | |
3561 | || !h->ref_regular | |
3562 | || !h->forced_local | |
3563 | || h->root.type != bfd_link_hash_defined) | |
3564 | abort (); | |
3565 | ||
351f65ca | 3566 | return elf_x86_64_allocate_dynrelocs (h, inf); |
c25bc9fc L |
3567 | } |
3568 | ||
c434dee6 AJ |
3569 | /* Find any dynamic relocs that apply to read-only sections. */ |
3570 | ||
b34976b6 | 3571 | static bfd_boolean |
351f65ca L |
3572 | elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h, |
3573 | void * inf) | |
c434dee6 | 3574 | { |
351f65ca | 3575 | struct elf_x86_64_link_hash_entry *eh; |
e03a8ed8 | 3576 | struct elf_dyn_relocs *p; |
c434dee6 | 3577 | |
aa715242 L |
3578 | /* Skip local IFUNC symbols. */ |
3579 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
3580 | return TRUE; | |
3581 | ||
351f65ca | 3582 | eh = (struct elf_x86_64_link_hash_entry *) h; |
c434dee6 AJ |
3583 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
3584 | { | |
3585 | asection *s = p->sec->output_section; | |
3586 | ||
3587 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
3588 | { | |
3589 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
3590 | ||
3591 | info->flags |= DF_TEXTREL; | |
3592 | ||
0e1862bb | 3593 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd | 3594 | || info->error_textrel) |
695344c0 | 3595 | /* xgettext:c-format */ |
1952c5cd | 3596 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"), |
b70321a2 L |
3597 | p->sec->owner, h->root.root.string, |
3598 | p->sec); | |
3599 | ||
c434dee6 | 3600 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 3601 | return FALSE; |
c434dee6 AJ |
3602 | } |
3603 | } | |
b34976b6 | 3604 | return TRUE; |
c434dee6 AJ |
3605 | } |
3606 | ||
c175a657 | 3607 | /* Convert load via the GOT slot to load immediate. */ |
daa67607 L |
3608 | |
3609 | static bfd_boolean | |
56ceb5b5 L |
3610 | elf_x86_64_convert_load (bfd *abfd, asection *sec, |
3611 | struct bfd_link_info *link_info) | |
daa67607 L |
3612 | { |
3613 | Elf_Internal_Shdr *symtab_hdr; | |
3614 | Elf_Internal_Rela *internal_relocs; | |
3615 | Elf_Internal_Rela *irel, *irelend; | |
3616 | bfd_byte *contents; | |
3617 | struct elf_x86_64_link_hash_table *htab; | |
c175a657 | 3618 | bfd_boolean changed; |
daa67607 L |
3619 | bfd_signed_vma *local_got_refcounts; |
3620 | ||
3621 | /* Don't even try to convert non-ELF outputs. */ | |
3622 | if (!is_elf_hash_table (link_info->hash)) | |
3623 | return FALSE; | |
3624 | ||
c1d11331 | 3625 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 3626 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
56ceb5b5 | 3627 | || sec->need_convert_load == 0 |
c8831961 | 3628 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
3629 | return TRUE; |
3630 | ||
3631 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3632 | ||
3633 | /* Load the relocations for this section. */ | |
3634 | internal_relocs = (_bfd_elf_link_read_relocs | |
3635 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
3636 | link_info->keep_memory)); | |
3637 | if (internal_relocs == NULL) | |
3638 | return FALSE; | |
3639 | ||
c175a657 | 3640 | changed = FALSE; |
daa67607 | 3641 | htab = elf_x86_64_hash_table (link_info); |
daa67607 L |
3642 | local_got_refcounts = elf_local_got_refcounts (abfd); |
3643 | ||
3644 | /* Get the section contents. */ | |
3645 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
3646 | contents = elf_section_data (sec)->this_hdr.contents; | |
3647 | else | |
3648 | { | |
3649 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
3650 | goto error_return; | |
3651 | } | |
3652 | ||
3653 | irelend = internal_relocs + sec->reloc_count; | |
3654 | for (irel = internal_relocs; irel < irelend; irel++) | |
3655 | { | |
3656 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
c175a657 | 3657 | unsigned int r_symndx; |
daa67607 | 3658 | struct elf_link_hash_entry *h; |
c175a657 | 3659 | bfd_boolean converted; |
59cab532 | 3660 | |
c175a657 L |
3661 | if (r_type != R_X86_64_GOTPCRELX |
3662 | && r_type != R_X86_64_REX_GOTPCRELX | |
3663 | && r_type != R_X86_64_GOTPCREL) | |
dfc87947 L |
3664 | continue; |
3665 | ||
c175a657 | 3666 | r_symndx = htab->r_sym (irel->r_info); |
daa67607 | 3667 | if (r_symndx < symtab_hdr->sh_info) |
c175a657 L |
3668 | h = elf_x86_64_get_local_sym_hash (htab, sec->owner, |
3669 | (const Elf_Internal_Rela *) irel, | |
3670 | FALSE); | |
59cab532 L |
3671 | else |
3672 | { | |
c175a657 | 3673 | h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info]; |
59cab532 L |
3674 | while (h->root.type == bfd_link_hash_indirect |
3675 | || h->root.type == bfd_link_hash_warning) | |
3676 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
59cab532 L |
3677 | } |
3678 | ||
c175a657 L |
3679 | /* STT_GNU_IFUNC must keep GOTPCREL relocations. */ |
3680 | if (h != NULL && h->type == STT_GNU_IFUNC) | |
3681 | continue; | |
daa67607 | 3682 | |
c175a657 L |
3683 | converted = FALSE; |
3684 | if (!elf_x86_64_convert_load_reloc (abfd, sec, contents, irel, h, | |
3685 | &converted, link_info)) | |
3686 | goto error_return; | |
56ceb5b5 | 3687 | |
c175a657 | 3688 | if (converted) |
56ceb5b5 | 3689 | { |
c175a657 L |
3690 | changed = converted; |
3691 | if (h) | |
56ceb5b5 | 3692 | { |
c175a657 L |
3693 | if (h->got.refcount > 0) |
3694 | h->got.refcount -= 1; | |
56ceb5b5 L |
3695 | } |
3696 | else | |
3697 | { | |
c175a657 L |
3698 | if (local_got_refcounts != NULL |
3699 | && local_got_refcounts[r_symndx] > 0) | |
3700 | local_got_refcounts[r_symndx] -= 1; | |
56ceb5b5 | 3701 | } |
daa67607 L |
3702 | } |
3703 | } | |
3704 | ||
3705 | if (contents != NULL | |
3706 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3707 | { | |
c175a657 | 3708 | if (!changed && !link_info->keep_memory) |
daa67607 L |
3709 | free (contents); |
3710 | else | |
3711 | { | |
3712 | /* Cache the section contents for elf_link_input_bfd. */ | |
3713 | elf_section_data (sec)->this_hdr.contents = contents; | |
3714 | } | |
3715 | } | |
3716 | ||
3717 | if (elf_section_data (sec)->relocs != internal_relocs) | |
3718 | { | |
c175a657 | 3719 | if (!changed) |
daa67607 L |
3720 | free (internal_relocs); |
3721 | else | |
3722 | elf_section_data (sec)->relocs = internal_relocs; | |
3723 | } | |
3724 | ||
3725 | return TRUE; | |
3726 | ||
3727 | error_return: | |
3728 | if (contents != NULL | |
3729 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3730 | free (contents); | |
3731 | if (internal_relocs != NULL | |
3732 | && elf_section_data (sec)->relocs != internal_relocs) | |
3733 | free (internal_relocs); | |
3734 | return FALSE; | |
3735 | } | |
3736 | ||
70256ad8 AJ |
3737 | /* Set the sizes of the dynamic sections. */ |
3738 | ||
b34976b6 | 3739 | static bfd_boolean |
351f65ca L |
3740 | elf_x86_64_size_dynamic_sections (bfd *output_bfd, |
3741 | struct bfd_link_info *info) | |
70256ad8 | 3742 | { |
351f65ca | 3743 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
3744 | bfd *dynobj; |
3745 | asection *s; | |
b34976b6 | 3746 | bfd_boolean relocs; |
c434dee6 | 3747 | bfd *ibfd; |
351f65ca | 3748 | const struct elf_backend_data *bed; |
70256ad8 | 3749 | |
351f65ca | 3750 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3751 | if (htab == NULL) |
3752 | return FALSE; | |
351f65ca | 3753 | bed = get_elf_backend_data (output_bfd); |
4dfe6ac6 | 3754 | |
c434dee6 AJ |
3755 | dynobj = htab->elf.dynobj; |
3756 | if (dynobj == NULL) | |
3757 | abort (); | |
70256ad8 | 3758 | |
c434dee6 AJ |
3759 | /* Set up .got offsets for local syms, and space for local dynamic |
3760 | relocs. */ | |
c72f2fb2 | 3761 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
70256ad8 | 3762 | { |
c434dee6 AJ |
3763 | bfd_signed_vma *local_got; |
3764 | bfd_signed_vma *end_local_got; | |
bffbf940 | 3765 | char *local_tls_type; |
67a4f2b7 | 3766 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
3767 | bfd_size_type locsymcount; |
3768 | Elf_Internal_Shdr *symtab_hdr; | |
3769 | asection *srel; | |
70256ad8 | 3770 | |
0ffa91dd | 3771 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
3772 | continue; |
3773 | ||
c434dee6 | 3774 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 3775 | { |
e03a8ed8 | 3776 | struct elf_dyn_relocs *p; |
c434dee6 | 3777 | |
56ceb5b5 | 3778 | if (!elf_x86_64_convert_load (ibfd, s, info)) |
daa67607 L |
3779 | return FALSE; |
3780 | ||
e03a8ed8 | 3781 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 3782 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
3783 | p != NULL; |
3784 | p = p->next) | |
70256ad8 | 3785 | { |
c434dee6 AJ |
3786 | if (!bfd_is_abs_section (p->sec) |
3787 | && bfd_is_abs_section (p->sec->output_section)) | |
3788 | { | |
3789 | /* Input section has been discarded, either because | |
3790 | it is a copy of a linkonce section or due to | |
3791 | linker script /DISCARD/, so we'll be discarding | |
3792 | the relocs too. */ | |
3793 | } | |
3794 | else if (p->count != 0) | |
3795 | { | |
3796 | srel = elf_section_data (p->sec)->sreloc; | |
351f65ca | 3797 | srel->size += p->count * bed->s->sizeof_rela; |
4b819e1f L |
3798 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
3799 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
3800 | { |
3801 | info->flags |= DF_TEXTREL; | |
0e1862bb | 3802 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd | 3803 | || info->error_textrel) |
695344c0 | 3804 | /* xgettext:c-format */ |
1952c5cd | 3805 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), |
b70321a2 | 3806 | p->sec->owner, p->sec); |
b70321a2 | 3807 | } |
c434dee6 | 3808 | } |
70256ad8 AJ |
3809 | } |
3810 | } | |
c434dee6 AJ |
3811 | |
3812 | local_got = elf_local_got_refcounts (ibfd); | |
3813 | if (!local_got) | |
3814 | continue; | |
3815 | ||
0ffa91dd | 3816 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
3817 | locsymcount = symtab_hdr->sh_info; |
3818 | end_local_got = local_got + locsymcount; | |
351f65ca L |
3819 | local_tls_type = elf_x86_64_local_got_tls_type (ibfd); |
3820 | local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd); | |
6de2ae4a L |
3821 | s = htab->elf.sgot; |
3822 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
3823 | for (; local_got < end_local_got; |
3824 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 3825 | { |
67a4f2b7 | 3826 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 3827 | if (*local_got > 0) |
70256ad8 | 3828 | { |
67a4f2b7 AO |
3829 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
3830 | { | |
6de2ae4a | 3831 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
351f65ca | 3832 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 3833 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
3834 | *local_got = (bfd_vma) -2; |
3835 | } | |
3836 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3837 | || GOT_TLS_GD_P (*local_tls_type)) | |
3838 | { | |
3839 | *local_got = s->size; | |
3840 | s->size += GOT_ENTRY_SIZE; | |
3841 | if (GOT_TLS_GD_P (*local_tls_type)) | |
3842 | s->size += GOT_ENTRY_SIZE; | |
3843 | } | |
0e1862bb | 3844 | if (bfd_link_pic (info) |
67a4f2b7 | 3845 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 3846 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
3847 | { |
3848 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
3849 | { | |
6de2ae4a | 3850 | htab->elf.srelplt->size |
351f65ca | 3851 | += bed->s->sizeof_rela; |
67a4f2b7 AO |
3852 | htab->tlsdesc_plt = (bfd_vma) -1; |
3853 | } | |
3854 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3855 | || GOT_TLS_GD_P (*local_tls_type)) | |
351f65ca | 3856 | srel->size += bed->s->sizeof_rela; |
67a4f2b7 | 3857 | } |
70256ad8 AJ |
3858 | } |
3859 | else | |
c434dee6 AJ |
3860 | *local_got = (bfd_vma) -1; |
3861 | } | |
3862 | } | |
70256ad8 | 3863 | |
bffbf940 JJ |
3864 | if (htab->tls_ld_got.refcount > 0) |
3865 | { | |
3866 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
3867 | relocs. */ | |
6de2ae4a L |
3868 | htab->tls_ld_got.offset = htab->elf.sgot->size; |
3869 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; | |
351f65ca | 3870 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
bffbf940 JJ |
3871 | } |
3872 | else | |
3873 | htab->tls_ld_got.offset = -1; | |
3874 | ||
c434dee6 AJ |
3875 | /* Allocate global sym .plt and .got entries, and space for global |
3876 | sym dynamic relocs. */ | |
351f65ca | 3877 | elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs, |
eb4ff4d6 | 3878 | info); |
c434dee6 | 3879 | |
c25bc9fc L |
3880 | /* Allocate .plt and .got entries, and space for local symbols. */ |
3881 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 3882 | elf_x86_64_allocate_local_dynrelocs, |
c25bc9fc L |
3883 | info); |
3884 | ||
67a4f2b7 AO |
3885 | /* For every jump slot reserved in the sgotplt, reloc_count is |
3886 | incremented. However, when we reserve space for TLS descriptors, | |
3887 | it's not incremented, so in order to compute the space reserved | |
3888 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 L |
3889 | slot size. |
3890 | ||
3891 | PR ld/13302: We start next_irelative_index at the end of .rela.plt | |
3892 | so that R_X86_64_IRELATIVE entries come last. */ | |
6de2ae4a | 3893 | if (htab->elf.srelplt) |
e1f98742 L |
3894 | { |
3895 | htab->sgotplt_jump_table_size | |
3896 | = elf_x86_64_compute_jump_table_size (htab); | |
3897 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
3898 | } | |
3899 | else if (htab->elf.irelplt) | |
3900 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
67a4f2b7 AO |
3901 | |
3902 | if (htab->tlsdesc_plt) | |
3903 | { | |
3904 | /* If we're not using lazy TLS relocations, don't generate the | |
3905 | PLT and GOT entries they require. */ | |
3906 | if ((info->flags & DF_BIND_NOW)) | |
3907 | htab->tlsdesc_plt = 0; | |
3908 | else | |
3909 | { | |
6de2ae4a L |
3910 | htab->tlsdesc_got = htab->elf.sgot->size; |
3911 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
3912 | /* Reserve room for the initial entry. |
3913 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a | 3914 | if (htab->elf.splt->size == 0) |
38b12349 | 3915 | htab->elf.splt->size = htab->plt.plt_entry_size; |
6de2ae4a | 3916 | htab->tlsdesc_plt = htab->elf.splt->size; |
38b12349 | 3917 | htab->elf.splt->size += htab->plt.plt_entry_size; |
67a4f2b7 AO |
3918 | } |
3919 | } | |
3920 | ||
a7b16ceb L |
3921 | if (htab->elf.sgotplt) |
3922 | { | |
3923 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
eed180f8 | 3924 | entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
3925 | if ((htab->elf.hgot == NULL |
3926 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
3927 | && (htab->elf.sgotplt->size |
3928 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
3929 | && (htab->elf.splt == NULL |
3930 | || htab->elf.splt->size == 0) | |
3931 | && (htab->elf.sgot == NULL | |
3932 | || htab->elf.sgot->size == 0) | |
3933 | && (htab->elf.iplt == NULL | |
3934 | || htab->elf.iplt->size == 0) | |
3935 | && (htab->elf.igotplt == NULL | |
3936 | || htab->elf.igotplt->size == 0)) | |
3937 | htab->elf.sgotplt->size = 0; | |
3938 | } | |
3939 | ||
fff53dae | 3940 | if (_bfd_elf_eh_frame_present (info)) |
9a2a56cc | 3941 | { |
fff53dae L |
3942 | if (htab->plt_eh_frame != NULL |
3943 | && htab->elf.splt != NULL | |
3944 | && htab->elf.splt->size != 0 | |
3945 | && !bfd_is_abs_section (htab->elf.splt->output_section)) | |
38b12349 | 3946 | htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size; |
fff53dae L |
3947 | |
3948 | if (htab->plt_got_eh_frame != NULL | |
3949 | && htab->plt_got != NULL | |
3950 | && htab->plt_got->size != 0 | |
3951 | && !bfd_is_abs_section (htab->plt_got->output_section)) | |
38b12349 L |
3952 | htab->plt_got_eh_frame->size |
3953 | = htab->non_lazy_plt->eh_frame_plt_size; | |
8361ed4d | 3954 | |
f2c29a16 | 3955 | /* Unwind info for the second PLT and .plt.got sections are |
8361ed4d | 3956 | identical. */ |
f2c29a16 L |
3957 | if (htab->plt_second_eh_frame != NULL |
3958 | && htab->plt_second != NULL | |
3959 | && htab->plt_second->size != 0 | |
3960 | && !bfd_is_abs_section (htab->plt_second->output_section)) | |
3961 | htab->plt_second_eh_frame->size | |
38b12349 | 3962 | = htab->non_lazy_plt->eh_frame_plt_size; |
9a2a56cc AM |
3963 | } |
3964 | ||
c434dee6 AJ |
3965 | /* We now have determined the sizes of the various dynamic sections. |
3966 | Allocate memory for them. */ | |
b34976b6 | 3967 | relocs = FALSE; |
c434dee6 AJ |
3968 | for (s = dynobj->sections; s != NULL; s = s->next) |
3969 | { | |
3970 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3971 | continue; | |
3972 | ||
6de2ae4a L |
3973 | if (s == htab->elf.splt |
3974 | || s == htab->elf.sgot | |
3975 | || s == htab->elf.sgotplt | |
3976 | || s == htab->elf.iplt | |
3977 | || s == htab->elf.igotplt | |
f2c29a16 | 3978 | || s == htab->plt_second |
dd7e64d4 | 3979 | || s == htab->plt_got |
9a2a56cc | 3980 | || s == htab->plt_eh_frame |
fff53dae | 3981 | || s == htab->plt_got_eh_frame |
f2c29a16 | 3982 | || s == htab->plt_second_eh_frame |
5474d94f AM |
3983 | || s == htab->elf.sdynbss |
3984 | || s == htab->elf.sdynrelro) | |
c434dee6 AJ |
3985 | { |
3986 | /* Strip this section if we don't need it; see the | |
3987 | comment below. */ | |
3988 | } | |
0112cd26 | 3989 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 3990 | { |
6de2ae4a | 3991 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 3992 | relocs = TRUE; |
c434dee6 AJ |
3993 | |
3994 | /* We use the reloc_count field as a counter if we need | |
3995 | to copy relocs into the output file. */ | |
6de2ae4a | 3996 | if (s != htab->elf.srelplt) |
67a4f2b7 | 3997 | s->reloc_count = 0; |
70256ad8 | 3998 | } |
c434dee6 | 3999 | else |
70256ad8 AJ |
4000 | { |
4001 | /* It's not one of our sections, so don't allocate space. */ | |
4002 | continue; | |
4003 | } | |
4004 | ||
eea6121a | 4005 | if (s->size == 0) |
70256ad8 | 4006 | { |
c434dee6 AJ |
4007 | /* If we don't need this section, strip it from the |
4008 | output file. This is mostly to handle .rela.bss and | |
4009 | .rela.plt. We must create both sections in | |
4010 | create_dynamic_sections, because they must be created | |
4011 | before the linker maps input sections to output | |
4012 | sections. The linker does that before | |
4013 | adjust_dynamic_symbol is called, and it is that | |
4014 | function which decides whether anything needs to go | |
4015 | into these sections. */ | |
4016 | ||
8423293d | 4017 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
4018 | continue; |
4019 | } | |
4020 | ||
c456f082 AM |
4021 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
4022 | continue; | |
4023 | ||
70256ad8 AJ |
4024 | /* Allocate memory for the section contents. We use bfd_zalloc |
4025 | here in case unused entries are not reclaimed before the | |
4026 | section's contents are written out. This should not happen, | |
4027 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
4028 | of garbage. */ | |
eea6121a | 4029 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 4030 | if (s->contents == NULL) |
b34976b6 | 4031 | return FALSE; |
70256ad8 AJ |
4032 | } |
4033 | ||
e41b3a13 | 4034 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
4035 | && htab->plt_eh_frame->contents != NULL) |
4036 | { | |
9a2a56cc | 4037 | memcpy (htab->plt_eh_frame->contents, |
38b12349 | 4038 | htab->plt.eh_frame_plt, htab->plt_eh_frame->size); |
9a2a56cc AM |
4039 | bfd_put_32 (dynobj, htab->elf.splt->size, |
4040 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
4041 | } | |
e41b3a13 | 4042 | |
fff53dae L |
4043 | if (htab->plt_got_eh_frame != NULL |
4044 | && htab->plt_got_eh_frame->contents != NULL) | |
4045 | { | |
fff53dae | 4046 | memcpy (htab->plt_got_eh_frame->contents, |
38b12349 | 4047 | htab->non_lazy_plt->eh_frame_plt, |
fff53dae L |
4048 | htab->plt_got_eh_frame->size); |
4049 | bfd_put_32 (dynobj, htab->plt_got->size, | |
4050 | (htab->plt_got_eh_frame->contents | |
4051 | + PLT_FDE_LEN_OFFSET)); | |
4052 | } | |
4053 | ||
f2c29a16 L |
4054 | if (htab->plt_second_eh_frame != NULL |
4055 | && htab->plt_second_eh_frame->contents != NULL) | |
8361ed4d | 4056 | { |
f2c29a16 | 4057 | memcpy (htab->plt_second_eh_frame->contents, |
38b12349 | 4058 | htab->non_lazy_plt->eh_frame_plt, |
f2c29a16 L |
4059 | htab->plt_second_eh_frame->size); |
4060 | bfd_put_32 (dynobj, htab->plt_second->size, | |
4061 | (htab->plt_second_eh_frame->contents | |
8361ed4d L |
4062 | + PLT_FDE_LEN_OFFSET)); |
4063 | } | |
4064 | ||
c434dee6 | 4065 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
4066 | { |
4067 | /* Add some entries to the .dynamic section. We fill in the | |
351f65ca | 4068 | values later, in elf_x86_64_finish_dynamic_sections, but we |
70256ad8 | 4069 | must add the entries now so that we get the correct size for |
407443a3 | 4070 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 4071 | dynamic linker and used by the debugger. */ |
dc810e39 | 4072 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 4073 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 4074 | |
0e1862bb | 4075 | if (bfd_link_executable (info)) |
70256ad8 | 4076 | { |
dc810e39 | 4077 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 4078 | return FALSE; |
70256ad8 AJ |
4079 | } |
4080 | ||
6de2ae4a | 4081 | if (htab->elf.splt->size != 0) |
70256ad8 | 4082 | { |
7c1e8d3e L |
4083 | /* DT_PLTGOT is used by prelink even if there is no PLT |
4084 | relocation. */ | |
4085 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
b34976b6 | 4086 | return FALSE; |
97d343d4 | 4087 | } |
67a4f2b7 | 4088 | |
97d343d4 L |
4089 | if (htab->elf.srelplt->size != 0) |
4090 | { | |
4091 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
4092 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
4093 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
67a4f2b7 | 4094 | return FALSE; |
70256ad8 AJ |
4095 | } |
4096 | ||
97d343d4 L |
4097 | if (htab->tlsdesc_plt |
4098 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
4099 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
4100 | return FALSE; | |
4101 | ||
70256ad8 AJ |
4102 | if (relocs) |
4103 | { | |
dc810e39 AM |
4104 | if (!add_dynamic_entry (DT_RELA, 0) |
4105 | || !add_dynamic_entry (DT_RELASZ, 0) | |
351f65ca | 4106 | || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela)) |
b34976b6 | 4107 | return FALSE; |
70256ad8 | 4108 | |
c434dee6 AJ |
4109 | /* If any dynamic relocs apply to a read-only section, |
4110 | then we need a DT_TEXTREL entry. */ | |
4111 | if ((info->flags & DF_TEXTREL) == 0) | |
eed180f8 | 4112 | elf_link_hash_traverse (&htab->elf, |
351f65ca | 4113 | elf_x86_64_readonly_dynrelocs, |
eb4ff4d6 | 4114 | info); |
c434dee6 AJ |
4115 | |
4116 | if ((info->flags & DF_TEXTREL) != 0) | |
4117 | { | |
2df3368d | 4118 | if (htab->readonly_dynrelocs_against_ifunc) |
8efa2874 L |
4119 | { |
4120 | info->callbacks->einfo | |
4121 | (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n")); | |
4122 | bfd_set_error (bfd_error_bad_value); | |
4123 | return FALSE; | |
4124 | } | |
4125 | ||
c434dee6 | 4126 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 4127 | return FALSE; |
c434dee6 | 4128 | } |
70256ad8 AJ |
4129 | } |
4130 | } | |
dc810e39 | 4131 | #undef add_dynamic_entry |
70256ad8 | 4132 | |
b34976b6 | 4133 | return TRUE; |
70256ad8 AJ |
4134 | } |
4135 | ||
67a4f2b7 | 4136 | static bfd_boolean |
351f65ca L |
4137 | elf_x86_64_always_size_sections (bfd *output_bfd, |
4138 | struct bfd_link_info *info) | |
67a4f2b7 AO |
4139 | { |
4140 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
4141 | ||
4142 | if (tls_sec) | |
4143 | { | |
4144 | struct elf_link_hash_entry *tlsbase; | |
4145 | ||
4146 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
4147 | "_TLS_MODULE_BASE_", | |
4148 | FALSE, FALSE, FALSE); | |
4149 | ||
4150 | if (tlsbase && tlsbase->type == STT_TLS) | |
4151 | { | |
351f65ca | 4152 | struct elf_x86_64_link_hash_table *htab; |
67a4f2b7 AO |
4153 | struct bfd_link_hash_entry *bh = NULL; |
4154 | const struct elf_backend_data *bed | |
4155 | = get_elf_backend_data (output_bfd); | |
4156 | ||
351f65ca | 4157 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4158 | if (htab == NULL) |
4159 | return FALSE; | |
4160 | ||
67a4f2b7 AO |
4161 | if (!(_bfd_generic_link_add_one_symbol |
4162 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
4163 | tls_sec, 0, NULL, FALSE, | |
4164 | bed->collect, &bh))) | |
4165 | return FALSE; | |
9f03412a | 4166 | |
4dfe6ac6 | 4167 | htab->tls_module_base = bh; |
9f03412a | 4168 | |
67a4f2b7 AO |
4169 | tlsbase = (struct elf_link_hash_entry *)bh; |
4170 | tlsbase->def_regular = 1; | |
4171 | tlsbase->other = STV_HIDDEN; | |
576fa883 | 4172 | tlsbase->root.linker_def = 1; |
67a4f2b7 AO |
4173 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
4174 | } | |
4175 | } | |
4176 | ||
4177 | return TRUE; | |
4178 | } | |
4179 | ||
9f03412a AO |
4180 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
4181 | executables. Rather than setting it to the beginning of the TLS | |
4182 | section, we have to set it to the end. This function may be called | |
4183 | multiple times, it is idempotent. */ | |
4184 | ||
4185 | static void | |
351f65ca | 4186 | elf_x86_64_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 4187 | { |
351f65ca | 4188 | struct elf_x86_64_link_hash_table *htab; |
9f03412a AO |
4189 | struct bfd_link_hash_entry *base; |
4190 | ||
0e1862bb | 4191 | if (!bfd_link_executable (info)) |
9f03412a AO |
4192 | return; |
4193 | ||
351f65ca | 4194 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4195 | if (htab == NULL) |
4196 | return; | |
9f03412a | 4197 | |
4dfe6ac6 NC |
4198 | base = htab->tls_module_base; |
4199 | if (base == NULL) | |
9f03412a AO |
4200 | return; |
4201 | ||
4dfe6ac6 | 4202 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
4203 | } |
4204 | ||
bffbf940 JJ |
4205 | /* Return the base VMA address which should be subtracted from real addresses |
4206 | when resolving @dtpoff relocation. | |
4207 | This is PT_TLS segment p_vaddr. */ | |
4208 | ||
4209 | static bfd_vma | |
351f65ca | 4210 | elf_x86_64_dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 4211 | { |
e1918d23 AM |
4212 | /* If tls_sec is NULL, we should have signalled an error already. */ |
4213 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 4214 | return 0; |
e1918d23 | 4215 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
4216 | } |
4217 | ||
4218 | /* Return the relocation value for @tpoff relocation | |
4219 | if STT_TLS virtual address is ADDRESS. */ | |
4220 | ||
4221 | static bfd_vma | |
351f65ca | 4222 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 4223 | { |
e1918d23 | 4224 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
4225 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
4226 | bfd_vma static_tls_size; | |
bffbf940 JJ |
4227 | |
4228 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 4229 | if (htab->tls_sec == NULL) |
bffbf940 | 4230 | return 0; |
7dc98aea RO |
4231 | |
4232 | /* Consider special static TLS alignment requirements. */ | |
4233 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
4234 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
4235 | } |
4236 | ||
90f487df L |
4237 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
4238 | branch? */ | |
4239 | ||
4240 | static bfd_boolean | |
4241 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
4242 | { | |
4243 | /* Opcode Instruction | |
4244 | 0xe8 call | |
4245 | 0xe9 jump | |
4246 | 0x0f 0x8x conditional jump */ | |
4247 | return ((offset > 0 | |
4248 | && (contents [offset - 1] == 0xe8 | |
4249 | || contents [offset - 1] == 0xe9)) | |
4250 | || (offset > 1 | |
4251 | && contents [offset - 2] == 0x0f | |
4252 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
4253 | } | |
4254 | ||
8d88c4ca NC |
4255 | /* Relocate an x86_64 ELF section. */ |
4256 | ||
b34976b6 | 4257 | static bfd_boolean |
351f65ca L |
4258 | elf_x86_64_relocate_section (bfd *output_bfd, |
4259 | struct bfd_link_info *info, | |
4260 | bfd *input_bfd, | |
4261 | asection *input_section, | |
4262 | bfd_byte *contents, | |
4263 | Elf_Internal_Rela *relocs, | |
4264 | Elf_Internal_Sym *local_syms, | |
4265 | asection **local_sections) | |
8d88c4ca | 4266 | { |
351f65ca | 4267 | struct elf_x86_64_link_hash_table *htab; |
8d88c4ca NC |
4268 | Elf_Internal_Shdr *symtab_hdr; |
4269 | struct elf_link_hash_entry **sym_hashes; | |
4270 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 4271 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 4272 | Elf_Internal_Rela *rel; |
60f2e42e | 4273 | Elf_Internal_Rela *wrel; |
8d88c4ca | 4274 | Elf_Internal_Rela *relend; |
38b12349 | 4275 | unsigned int plt_entry_size; |
8d88c4ca | 4276 | |
0ffa91dd NC |
4277 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
4278 | ||
338c190a L |
4279 | /* Skip if check_relocs failed. */ |
4280 | if (input_section->check_relocs_failed) | |
4281 | return FALSE; | |
4282 | ||
351f65ca | 4283 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4284 | if (htab == NULL) |
4285 | return FALSE; | |
38b12349 | 4286 | plt_entry_size = htab->plt.plt_entry_size; |
0ffa91dd | 4287 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
4288 | sym_hashes = elf_sym_hashes (input_bfd); |
4289 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
351f65ca | 4290 | local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 4291 | |
351f65ca | 4292 | elf_x86_64_set_tls_module_base (info); |
9f03412a | 4293 | |
60f2e42e | 4294 | rel = wrel = relocs; |
8d88c4ca | 4295 | relend = relocs + input_section->reloc_count; |
60f2e42e | 4296 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 4297 | { |
bffbf940 | 4298 | unsigned int r_type; |
8d88c4ca NC |
4299 | reloc_howto_type *howto; |
4300 | unsigned long r_symndx; | |
4301 | struct elf_link_hash_entry *h; | |
0ff2b86e | 4302 | struct elf_x86_64_link_hash_entry *eh; |
8d88c4ca NC |
4303 | Elf_Internal_Sym *sym; |
4304 | asection *sec; | |
0ff2b86e | 4305 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 4306 | bfd_vma relocation; |
b34976b6 | 4307 | bfd_boolean unresolved_reloc; |
8d88c4ca | 4308 | bfd_reloc_status_type r; |
bffbf940 | 4309 | int tls_type; |
0ff2b86e | 4310 | asection *base_got, *resolved_plt; |
1788fc08 | 4311 | bfd_vma st_size; |
aec6b87e | 4312 | bfd_boolean resolved_to_zero; |
9e9821dd | 4313 | bfd_boolean relative_reloc; |
8d88c4ca | 4314 | |
351f65ca | 4315 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
4316 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
4317 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
4318 | { |
4319 | if (wrel != rel) | |
4320 | *wrel = *rel; | |
4321 | continue; | |
4322 | } | |
8d88c4ca | 4323 | |
9911c0fc | 4324 | if (r_type >= (int) R_X86_64_standard) |
47aeb64c | 4325 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
8d88c4ca | 4326 | |
d7921315 | 4327 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 4328 | || ABI_64_P (output_bfd)) |
d7921315 L |
4329 | howto = x86_64_elf_howto_table + r_type; |
4330 | else | |
4331 | howto = (x86_64_elf_howto_table | |
4332 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 4333 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
4334 | h = NULL; |
4335 | sym = NULL; | |
4336 | sec = NULL; | |
b34976b6 | 4337 | unresolved_reloc = FALSE; |
8d88c4ca | 4338 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
4339 | { |
4340 | sym = local_syms + r_symndx; | |
4341 | sec = local_sections[r_symndx]; | |
c434dee6 | 4342 | |
c25bc9fc L |
4343 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
4344 | &sec, rel); | |
1788fc08 | 4345 | st_size = sym->st_size; |
c25bc9fc L |
4346 | |
4347 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 4348 | if (!bfd_link_relocatable (info) |
351f65ca | 4349 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 4350 | { |
351f65ca L |
4351 | h = elf_x86_64_get_local_sym_hash (htab, input_bfd, |
4352 | rel, FALSE); | |
c25bc9fc L |
4353 | if (h == NULL) |
4354 | abort (); | |
4355 | ||
eed180f8 | 4356 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
4357 | h->root.u.def.value = sym->st_value; |
4358 | h->root.u.def.section = sec; | |
4359 | } | |
8da6118f | 4360 | } |
8d88c4ca | 4361 | else |
8da6118f | 4362 | { |
c9736ba0 | 4363 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 4364 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
c434dee6 | 4365 | |
b2a8e766 AM |
4366 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
4367 | r_symndx, symtab_hdr, sym_hashes, | |
4368 | h, sec, relocation, | |
62d887d4 | 4369 | unresolved_reloc, warned, ignored); |
1788fc08 | 4370 | st_size = h->size; |
8da6118f | 4371 | } |
ab96bf03 | 4372 | |
dbaa2011 | 4373 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
4374 | { |
4375 | _bfd_clear_contents (howto, input_bfd, input_section, | |
4376 | contents + rel->r_offset); | |
4377 | wrel->r_offset = rel->r_offset; | |
4378 | wrel->r_info = 0; | |
4379 | wrel->r_addend = 0; | |
4380 | ||
4381 | /* For ld -r, remove relocations in debug sections against | |
4382 | sections defined in discarded sections. Not done for | |
4383 | eh_frame editing code expects to be present. */ | |
4384 | if (bfd_link_relocatable (info) | |
4385 | && (input_section->flags & SEC_DEBUGGING)) | |
4386 | wrel--; | |
4387 | ||
4388 | continue; | |
4389 | } | |
ab96bf03 | 4390 | |
0e1862bb | 4391 | if (bfd_link_relocatable (info)) |
2d5da473 L |
4392 | { |
4393 | if (wrel != rel) | |
4394 | *wrel = *rel; | |
4395 | continue; | |
4396 | } | |
ab96bf03 | 4397 | |
1788fc08 | 4398 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 4399 | { |
1788fc08 L |
4400 | if (r_type == R_X86_64_64) |
4401 | { | |
4402 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
4403 | zero-extend it to 64bit if addend is zero. */ | |
4404 | r_type = R_X86_64_32; | |
4405 | memset (contents + rel->r_offset + 4, 0, 4); | |
4406 | } | |
4407 | else if (r_type == R_X86_64_SIZE64) | |
4408 | { | |
4409 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
4410 | zero-extend it to 64bit if addend is zero. */ | |
4411 | r_type = R_X86_64_SIZE32; | |
4412 | memset (contents + rel->r_offset + 4, 0, 4); | |
4413 | } | |
64d25c44 L |
4414 | } |
4415 | ||
0ff2b86e L |
4416 | eh = (struct elf_x86_64_link_hash_entry *) h; |
4417 | ||
cbe950e9 L |
4418 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
4419 | it here if it is defined in a non-shared object. */ | |
4420 | if (h != NULL | |
4421 | && h->type == STT_GNU_IFUNC | |
4422 | && h->def_regular) | |
4423 | { | |
cbe950e9 | 4424 | bfd_vma plt_index; |
4c544807 | 4425 | const char *name; |
cbe950e9 | 4426 | |
97dc35c8 L |
4427 | if ((input_section->flags & SEC_ALLOC) == 0) |
4428 | { | |
4429 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
4430 | sections because such sections are not SEC_ALLOC and | |
4431 | thus ld.so will not process them. */ | |
4432 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 4433 | continue; |
97dc35c8 L |
4434 | abort (); |
4435 | } | |
233cc9c1 L |
4436 | |
4437 | switch (r_type) | |
4438 | { | |
4439 | default: | |
4440 | break; | |
4441 | ||
4442 | case R_X86_64_GOTPCREL: | |
4443 | case R_X86_64_GOTPCRELX: | |
4444 | case R_X86_64_REX_GOTPCRELX: | |
4445 | case R_X86_64_GOTPCREL64: | |
4446 | base_got = htab->elf.sgot; | |
4447 | off = h->got.offset; | |
4448 | ||
4449 | if (base_got == NULL) | |
4450 | abort (); | |
4451 | ||
4452 | if (off == (bfd_vma) -1) | |
4453 | { | |
4454 | /* We can't use h->got.offset here to save state, or | |
4455 | even just remember the offset, as finish_dynamic_symbol | |
4456 | would use that as offset into .got. */ | |
4457 | ||
4458 | if (h->plt.offset == (bfd_vma) -1) | |
4459 | abort (); | |
4460 | ||
4461 | if (htab->elf.splt != NULL) | |
4462 | { | |
38b12349 L |
4463 | plt_index = (h->plt.offset / plt_entry_size |
4464 | - htab->plt.has_plt0); | |
233cc9c1 L |
4465 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
4466 | base_got = htab->elf.sgotplt; | |
4467 | } | |
4468 | else | |
4469 | { | |
4470 | plt_index = h->plt.offset / plt_entry_size; | |
4471 | off = plt_index * GOT_ENTRY_SIZE; | |
4472 | base_got = htab->elf.igotplt; | |
4473 | } | |
4474 | ||
4475 | if (h->dynindx == -1 | |
4476 | || h->forced_local | |
4477 | || info->symbolic) | |
4478 | { | |
4479 | /* This references the local defitionion. We must | |
4480 | initialize this entry in the global offset table. | |
4481 | Since the offset must always be a multiple of 8, | |
4482 | we use the least significant bit to record | |
4483 | whether we have initialized it already. | |
4484 | ||
4485 | When doing a dynamic link, we create a .rela.got | |
4486 | relocation entry to initialize the value. This | |
4487 | is done in the finish_dynamic_symbol routine. */ | |
4488 | if ((off & 1) != 0) | |
4489 | off &= ~1; | |
4490 | else | |
4491 | { | |
4492 | bfd_put_64 (output_bfd, relocation, | |
4493 | base_got->contents + off); | |
4494 | /* Note that this is harmless for the GOTPLT64 | |
4495 | case, as -1 | 1 still is -1. */ | |
4496 | h->got.offset |= 1; | |
4497 | } | |
4498 | } | |
4499 | } | |
4500 | ||
4501 | relocation = (base_got->output_section->vma | |
4502 | + base_got->output_offset + off); | |
4503 | ||
4504 | goto do_relocation; | |
4505 | } | |
4506 | ||
4507 | if (h->plt.offset == (bfd_vma) -1) | |
4508 | { | |
4509 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
4510 | if (r_type == htab->pointer_r_type | |
4511 | && (input_section->flags & SEC_CODE) == 0) | |
4512 | goto do_ifunc_pointer; | |
4513 | goto bad_ifunc_reloc; | |
4514 | } | |
cbe950e9 L |
4515 | |
4516 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
4517 | if (htab->elf.splt != NULL) |
4518 | { | |
f2c29a16 | 4519 | if (htab->plt_second != NULL) |
0ff2b86e | 4520 | { |
f2c29a16 L |
4521 | resolved_plt = htab->plt_second; |
4522 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
4523 | } |
4524 | else | |
4525 | { | |
4526 | resolved_plt = htab->elf.splt; | |
4527 | plt_offset = h->plt.offset; | |
4528 | } | |
4529 | } | |
4530 | else | |
4531 | { | |
4532 | resolved_plt = htab->elf.iplt; | |
4533 | plt_offset = h->plt.offset; | |
4534 | } | |
4535 | ||
4536 | relocation = (resolved_plt->output_section->vma | |
4537 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
4538 | |
4539 | switch (r_type) | |
4540 | { | |
4541 | default: | |
233cc9c1 | 4542 | bad_ifunc_reloc: |
4c544807 L |
4543 | if (h->root.root.string) |
4544 | name = h->root.root.string; | |
4545 | else | |
4546 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
4547 | NULL); | |
4eca0228 | 4548 | _bfd_error_handler |
695344c0 | 4549 | /* xgettext:c-format */ |
cbe950e9 | 4550 | (_("%B: relocation %s against STT_GNU_IFUNC " |
233cc9c1 L |
4551 | "symbol `%s' isn't supported"), input_bfd, |
4552 | howto->name, name); | |
cbe950e9 L |
4553 | bfd_set_error (bfd_error_bad_value); |
4554 | return FALSE; | |
4555 | ||
4556 | case R_X86_64_32S: | |
0e1862bb | 4557 | if (bfd_link_pic (info)) |
cbe950e9 | 4558 | abort (); |
710ab287 L |
4559 | goto do_relocation; |
4560 | ||
248775ba L |
4561 | case R_X86_64_32: |
4562 | if (ABI_64_P (output_bfd)) | |
4563 | goto do_relocation; | |
17672001 | 4564 | /* FALLTHROUGH */ |
eed180f8 | 4565 | case R_X86_64_64: |
233cc9c1 | 4566 | do_ifunc_pointer: |
710ab287 L |
4567 | if (rel->r_addend != 0) |
4568 | { | |
4c544807 L |
4569 | if (h->root.root.string) |
4570 | name = h->root.root.string; | |
4571 | else | |
4572 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
4573 | sym, NULL); | |
4eca0228 | 4574 | _bfd_error_handler |
695344c0 | 4575 | /* xgettext:c-format */ |
710ab287 | 4576 | (_("%B: relocation %s against STT_GNU_IFUNC " |
d42c267e | 4577 | "symbol `%s' has non-zero addend: %Ld"), |
ef77d6af | 4578 | input_bfd, howto->name, name, rel->r_addend); |
710ab287 L |
4579 | bfd_set_error (bfd_error_bad_value); |
4580 | return FALSE; | |
4581 | } | |
4582 | ||
4583 | /* Generate dynamic relcoation only when there is a | |
233cc9c1 L |
4584 | non-GOT reference in a shared object or there is no |
4585 | PLT. */ | |
4586 | if ((bfd_link_pic (info) && h->non_got_ref) | |
4587 | || h->plt.offset == (bfd_vma) -1) | |
710ab287 L |
4588 | { |
4589 | Elf_Internal_Rela outrel; | |
710ab287 L |
4590 | asection *sreloc; |
4591 | ||
c25bc9fc L |
4592 | /* Need a dynamic relocation to get the real function |
4593 | address. */ | |
710ab287 L |
4594 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
4595 | info, | |
4596 | input_section, | |
4597 | rel->r_offset); | |
4598 | if (outrel.r_offset == (bfd_vma) -1 | |
4599 | || outrel.r_offset == (bfd_vma) -2) | |
4600 | abort (); | |
4601 | ||
4602 | outrel.r_offset += (input_section->output_section->vma | |
4603 | + input_section->output_offset); | |
4604 | ||
4605 | if (h->dynindx == -1 | |
44c4ea11 | 4606 | || h->forced_local |
0e1862bb | 4607 | || bfd_link_executable (info)) |
710ab287 | 4608 | { |
6322e5c5 L |
4609 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
4610 | h->root.root.string, | |
4611 | h->root.u.def.section->owner); | |
4612 | ||
710ab287 | 4613 | /* This symbol is resolved locally. */ |
56b8aada L |
4614 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
4615 | outrel.r_addend = (h->root.u.def.value | |
4616 | + h->root.u.def.section->output_section->vma | |
4617 | + h->root.u.def.section->output_offset); | |
710ab287 L |
4618 | } |
4619 | else | |
4620 | { | |
351f65ca | 4621 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
4622 | outrel.r_addend = 0; |
4623 | } | |
4624 | ||
233cc9c1 L |
4625 | /* Dynamic relocations are stored in |
4626 | 1. .rela.ifunc section in PIC object. | |
4627 | 2. .rela.got section in dynamic executable. | |
4628 | 3. .rela.iplt section in static executable. */ | |
4629 | if (bfd_link_pic (info)) | |
4630 | sreloc = htab->elf.irelifunc; | |
4631 | else if (htab->elf.splt != NULL) | |
4632 | sreloc = htab->elf.srelgot; | |
4633 | else | |
4634 | sreloc = htab->elf.irelplt; | |
351f65ca | 4635 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
4636 | |
4637 | /* If this reloc is against an external symbol, we | |
4638 | do not want to fiddle with the addend. Otherwise, | |
4639 | we need to include the symbol value so that it | |
4640 | becomes an addend for the dynamic reloc. For an | |
4641 | internal symbol, we have updated addend. */ | |
56b8aada | 4642 | continue; |
710ab287 | 4643 | } |
17672001 | 4644 | /* FALLTHROUGH */ |
cbe950e9 | 4645 | case R_X86_64_PC32: |
c3320543 | 4646 | case R_X86_64_PC32_BND: |
cbe950e9 L |
4647 | case R_X86_64_PC64: |
4648 | case R_X86_64_PLT32: | |
c3320543 | 4649 | case R_X86_64_PLT32_BND: |
cbe950e9 | 4650 | goto do_relocation; |
cbe950e9 L |
4651 | } |
4652 | } | |
4653 | ||
aec6b87e | 4654 | resolved_to_zero = (eh != NULL |
e62b9723 L |
4655 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
4656 | eh->has_got_reloc, | |
4657 | eh)); | |
aec6b87e | 4658 | |
70256ad8 AJ |
4659 | /* When generating a shared object, the relocations handled here are |
4660 | copied into the output file to be resolved at run time. */ | |
4661 | switch (r_type) | |
4662 | { | |
4663 | case R_X86_64_GOT32: | |
7b81dfbb | 4664 | case R_X86_64_GOT64: |
70256ad8 AJ |
4665 | /* Relocation is to the entry for this symbol in the global |
4666 | offset table. */ | |
70256ad8 | 4667 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
4668 | case R_X86_64_GOTPCRELX: |
4669 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
4670 | case R_X86_64_GOTPCREL64: |
4671 | /* Use global offset table entry as symbol value. */ | |
4672 | case R_X86_64_GOTPLT64: | |
de194d85 | 4673 | /* This is obsolete and treated the same as GOT64. */ |
6de2ae4a | 4674 | base_got = htab->elf.sgot; |
7b81dfbb | 4675 | |
6de2ae4a | 4676 | if (htab->elf.sgot == NULL) |
c434dee6 | 4677 | abort (); |
053579d7 | 4678 | |
9e9821dd | 4679 | relative_reloc = FALSE; |
51e0a107 | 4680 | if (h != NULL) |
70256ad8 | 4681 | { |
b34976b6 | 4682 | bfd_boolean dyn; |
c434dee6 AJ |
4683 | |
4684 | off = h->got.offset; | |
7b81dfbb | 4685 | if (h->needs_plt |
eed180f8 | 4686 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
4687 | && off == (bfd_vma)-1) |
4688 | { | |
4689 | /* We can't use h->got.offset here to save | |
4690 | state, or even just remember the offset, as | |
4691 | finish_dynamic_symbol would use that as offset into | |
4692 | .got. */ | |
38b12349 L |
4693 | bfd_vma plt_index = (h->plt.offset / plt_entry_size |
4694 | - htab->plt.has_plt0); | |
7b81dfbb | 4695 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 4696 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
4697 | } |
4698 | ||
c434dee6 | 4699 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 4700 | |
0e1862bb L |
4701 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
4702 | || (bfd_link_pic (info) | |
27482721 | 4703 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
4704 | || (ELF_ST_VISIBILITY (h->other) |
4705 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
4706 | { |
4707 | /* This is actually a static link, or it is a -Bsymbolic | |
4708 | link and the symbol is defined locally, or the symbol | |
407443a3 | 4709 | was forced to be local because of a version file. We |
51e0a107 JH |
4710 | must initialize this entry in the global offset table. |
4711 | Since the offset must always be a multiple of 8, we | |
4712 | use the least significant bit to record whether we | |
4713 | have initialized it already. | |
4714 | ||
4715 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
4716 | relocation entry to initialize the value. This is |
4717 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
4718 | if ((off & 1) != 0) |
4719 | off &= ~1; | |
4720 | else | |
4721 | { | |
4722 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
4723 | base_got->contents + off); |
4724 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 4725 | as -1 | 1 still is -1. */ |
51e0a107 | 4726 | h->got.offset |= 1; |
9e9821dd L |
4727 | |
4728 | if (h->dynindx == -1 | |
4729 | && !h->forced_local | |
4730 | && h->root.type != bfd_link_hash_undefweak | |
4731 | && bfd_link_pic (info)) | |
4732 | { | |
4733 | /* If this symbol isn't dynamic in PIC, | |
4734 | generate R_X86_64_RELATIVE here. */ | |
4735 | eh->no_finish_dynamic_symbol = 1; | |
4736 | relative_reloc = TRUE; | |
4737 | } | |
51e0a107 JH |
4738 | } |
4739 | } | |
053579d7 | 4740 | else |
b34976b6 | 4741 | unresolved_reloc = FALSE; |
70256ad8 | 4742 | } |
51e0a107 JH |
4743 | else |
4744 | { | |
c434dee6 AJ |
4745 | if (local_got_offsets == NULL) |
4746 | abort (); | |
51e0a107 JH |
4747 | |
4748 | off = local_got_offsets[r_symndx]; | |
4749 | ||
4750 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
4751 | the least significant bit to record whether we have |
4752 | already generated the necessary reloc. */ | |
51e0a107 JH |
4753 | if ((off & 1) != 0) |
4754 | off &= ~1; | |
4755 | else | |
4756 | { | |
c434dee6 | 4757 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 4758 | base_got->contents + off); |
9e9821dd | 4759 | local_got_offsets[r_symndx] |= 1; |
51e0a107 | 4760 | |
0e1862bb | 4761 | if (bfd_link_pic (info)) |
9e9821dd | 4762 | relative_reloc = TRUE; |
51e0a107 | 4763 | } |
51e0a107 | 4764 | } |
6a2bda3f | 4765 | |
9e9821dd L |
4766 | if (relative_reloc) |
4767 | { | |
4768 | asection *s; | |
4769 | Elf_Internal_Rela outrel; | |
4770 | ||
4771 | /* We need to generate a R_X86_64_RELATIVE reloc | |
4772 | for the dynamic linker. */ | |
4773 | s = htab->elf.srelgot; | |
4774 | if (s == NULL) | |
4775 | abort (); | |
4776 | ||
4777 | outrel.r_offset = (base_got->output_section->vma | |
4778 | + base_got->output_offset | |
4779 | + off); | |
4780 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); | |
4781 | outrel.r_addend = relocation; | |
4782 | elf_append_rela (output_bfd, s, &outrel); | |
4783 | } | |
4784 | ||
c434dee6 AJ |
4785 | if (off >= (bfd_vma) -2) |
4786 | abort (); | |
4787 | ||
7b81dfbb AJ |
4788 | relocation = base_got->output_section->vma |
4789 | + base_got->output_offset + off; | |
56ceb5b5 L |
4790 | if (r_type != R_X86_64_GOTPCREL |
4791 | && r_type != R_X86_64_GOTPCRELX | |
4792 | && r_type != R_X86_64_REX_GOTPCRELX | |
4793 | && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
4794 | relocation -= htab->elf.sgotplt->output_section->vma |
4795 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 4796 | |
70256ad8 AJ |
4797 | break; |
4798 | ||
d6ab8113 JB |
4799 | case R_X86_64_GOTOFF64: |
4800 | /* Relocation is relative to the start of the global offset | |
4801 | table. */ | |
4802 | ||
3d949995 L |
4803 | /* Check to make sure it isn't a protected function or data |
4804 | symbol for shared library since it may not be local when | |
e3c0e327 L |
4805 | used as function address or with copy relocation. We also |
4806 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 4807 | if (bfd_link_pic (info) && h) |
d6ab8113 | 4808 | { |
e3c0e327 L |
4809 | if (!h->def_regular) |
4810 | { | |
4811 | const char *v; | |
4812 | ||
4813 | switch (ELF_ST_VISIBILITY (h->other)) | |
4814 | { | |
4815 | case STV_HIDDEN: | |
4816 | v = _("hidden symbol"); | |
4817 | break; | |
4818 | case STV_INTERNAL: | |
4819 | v = _("internal symbol"); | |
4820 | break; | |
4821 | case STV_PROTECTED: | |
4822 | v = _("protected symbol"); | |
4823 | break; | |
4824 | default: | |
4825 | v = _("symbol"); | |
4826 | break; | |
4827 | } | |
4828 | ||
4eca0228 | 4829 | _bfd_error_handler |
695344c0 | 4830 | /* xgettext:c-format */ |
63a5468a AM |
4831 | (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s" |
4832 | " `%s' can not be used when making a shared object"), | |
e3c0e327 L |
4833 | input_bfd, v, h->root.root.string); |
4834 | bfd_set_error (bfd_error_bad_value); | |
4835 | return FALSE; | |
4836 | } | |
0e1862bb | 4837 | else if (!bfd_link_executable (info) |
e3c0e327 L |
4838 | && !SYMBOL_REFERENCES_LOCAL (info, h) |
4839 | && (h->type == STT_FUNC | |
4840 | || h->type == STT_OBJECT) | |
4841 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
4842 | { | |
4eca0228 | 4843 | _bfd_error_handler |
695344c0 | 4844 | /* xgettext:c-format */ |
63a5468a AM |
4845 | (_("%B: relocation R_X86_64_GOTOFF64 against protected %s" |
4846 | " `%s' can not be used when making a shared object"), | |
e3c0e327 L |
4847 | input_bfd, |
4848 | h->type == STT_FUNC ? "function" : "data", | |
4849 | h->root.root.string); | |
4850 | bfd_set_error (bfd_error_bad_value); | |
d6ab8113 | 4851 | return FALSE; |
e3c0e327 | 4852 | } |
d6ab8113 JB |
4853 | } |
4854 | ||
4855 | /* Note that sgot is not involved in this | |
4856 | calculation. We always want the start of .got.plt. If we | |
4857 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
4858 | permitted by the ABI, we might have to change this | |
4859 | calculation. */ | |
6de2ae4a L |
4860 | relocation -= htab->elf.sgotplt->output_section->vma |
4861 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4862 | break; |
4863 | ||
4864 | case R_X86_64_GOTPC32: | |
7b81dfbb | 4865 | case R_X86_64_GOTPC64: |
d6ab8113 | 4866 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
4867 | relocation = htab->elf.sgotplt->output_section->vma |
4868 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4869 | unresolved_reloc = FALSE; |
4870 | break; | |
7b81dfbb AJ |
4871 | |
4872 | case R_X86_64_PLTOFF64: | |
4873 | /* Relocation is PLT entry relative to GOT. For local | |
4874 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 4875 | if (h != NULL |
7b81dfbb | 4876 | /* See PLT32 handling. */ |
9d734efa L |
4877 | && (h->plt.offset != (bfd_vma) -1 |
4878 | || eh->plt_got.offset != (bfd_vma) -1) | |
6de2ae4a | 4879 | && htab->elf.splt != NULL) |
7b81dfbb | 4880 | { |
9d734efa L |
4881 | if (eh->plt_got.offset != (bfd_vma) -1) |
4882 | { | |
4883 | /* Use the GOT PLT. */ | |
4884 | resolved_plt = htab->plt_got; | |
4885 | plt_offset = eh->plt_got.offset; | |
4886 | } | |
f2c29a16 | 4887 | else if (htab->plt_second != NULL) |
0ff2b86e | 4888 | { |
f2c29a16 L |
4889 | resolved_plt = htab->plt_second; |
4890 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
4891 | } |
4892 | else | |
4893 | { | |
4894 | resolved_plt = htab->elf.splt; | |
4895 | plt_offset = h->plt.offset; | |
4896 | } | |
4897 | ||
4898 | relocation = (resolved_plt->output_section->vma | |
4899 | + resolved_plt->output_offset | |
4900 | + plt_offset); | |
7b81dfbb AJ |
4901 | unresolved_reloc = FALSE; |
4902 | } | |
4903 | ||
6de2ae4a L |
4904 | relocation -= htab->elf.sgotplt->output_section->vma |
4905 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 4906 | break; |
d6ab8113 | 4907 | |
70256ad8 | 4908 | case R_X86_64_PLT32: |
c3320543 | 4909 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
4910 | /* Relocation is to the entry for this symbol in the |
4911 | procedure linkage table. */ | |
4912 | ||
4913 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 4914 | without using the procedure linkage table. */ |
70256ad8 AJ |
4915 | if (h == NULL) |
4916 | break; | |
4917 | ||
dd7e64d4 L |
4918 | if ((h->plt.offset == (bfd_vma) -1 |
4919 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 4920 | || htab->elf.splt == NULL) |
70256ad8 AJ |
4921 | { |
4922 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
4923 | happens when statically linking PIC code, or when |
4924 | using -Bsymbolic. */ | |
70256ad8 AJ |
4925 | break; |
4926 | } | |
4927 | ||
dd7e64d4 | 4928 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 4929 | { |
f2c29a16 | 4930 | if (htab->plt_second != NULL) |
dd7e64d4 | 4931 | { |
f2c29a16 L |
4932 | resolved_plt = htab->plt_second; |
4933 | plt_offset = eh->plt_second.offset; | |
dd7e64d4 L |
4934 | } |
4935 | else | |
4936 | { | |
4937 | resolved_plt = htab->elf.splt; | |
4938 | plt_offset = h->plt.offset; | |
4939 | } | |
0ff2b86e L |
4940 | } |
4941 | else | |
4942 | { | |
dd7e64d4 L |
4943 | /* Use the GOT PLT. */ |
4944 | resolved_plt = htab->plt_got; | |
4945 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
4946 | } |
4947 | ||
4948 | relocation = (resolved_plt->output_section->vma | |
4949 | + resolved_plt->output_offset | |
4950 | + plt_offset); | |
b34976b6 | 4951 | unresolved_reloc = FALSE; |
70256ad8 AJ |
4952 | break; |
4953 | ||
1788fc08 L |
4954 | case R_X86_64_SIZE32: |
4955 | case R_X86_64_SIZE64: | |
1788fc08 L |
4956 | /* Set to symbol size. */ |
4957 | relocation = st_size; | |
4958 | goto direct; | |
4959 | ||
fd8ab9e5 AJ |
4960 | case R_X86_64_PC8: |
4961 | case R_X86_64_PC16: | |
4962 | case R_X86_64_PC32: | |
c3320543 | 4963 | case R_X86_64_PC32_BND: |
6333bc0d | 4964 | /* Don't complain about -fPIC if the symbol is undefined when |
7073b5b9 L |
4965 | building executable unless it is unresolved weak symbol or |
4966 | -z nocopyreloc is used. */ | |
aec6b87e | 4967 | if ((input_section->flags & SEC_ALLOC) != 0 |
90f487df | 4968 | && (input_section->flags & SEC_READONLY) != 0 |
6333bc0d | 4969 | && h != NULL |
aec6b87e | 4970 | && ((bfd_link_executable (info) |
7073b5b9 L |
4971 | && ((h->root.type == bfd_link_hash_undefweak |
4972 | && !resolved_to_zero) | |
a5b4ee94 L |
4973 | || ((info->nocopyreloc |
4974 | || (eh->def_protected | |
4975 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
4976 | && h->def_dynamic |
4977 | && !(h->root.u.def.section->flags & SEC_CODE)))) | |
c5bb8910 | 4978 | || bfd_link_dll (info))) |
6610a52d | 4979 | { |
41bed6dd L |
4980 | bfd_boolean fail = FALSE; |
4981 | bfd_boolean branch | |
c3320543 L |
4982 | = ((r_type == R_X86_64_PC32 |
4983 | || r_type == R_X86_64_PC32_BND) | |
41bed6dd L |
4984 | && is_32bit_relative_branch (contents, rel->r_offset)); |
4985 | ||
4986 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
4987 | { | |
4988 | /* Symbol is referenced locally. Make sure it is | |
4989 | defined locally or for a branch. */ | |
8170f769 L |
4990 | fail = (!(h->def_regular || ELF_COMMON_DEF_P (h)) |
4991 | && !branch); | |
41bed6dd | 4992 | } |
aec6b87e | 4993 | else if (!(bfd_link_pie (info) |
bc696fd5 | 4994 | && (h->needs_copy || eh->needs_copy))) |
41bed6dd | 4995 | { |
9a926d55 L |
4996 | /* Symbol doesn't need copy reloc and isn't referenced |
4997 | locally. We only allow branch to symbol with | |
4998 | non-default visibility. */ | |
41bed6dd L |
4999 | fail = (!branch |
5000 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
5001 | } | |
5002 | ||
5003 | if (fail) | |
aab921ad | 5004 | return elf_x86_64_need_pic (info, input_bfd, input_section, |
338c190a | 5005 | h, NULL, NULL, howto); |
6610a52d L |
5006 | } |
5007 | /* Fall through. */ | |
5008 | ||
70256ad8 AJ |
5009 | case R_X86_64_8: |
5010 | case R_X86_64_16: | |
5011 | case R_X86_64_32: | |
d6ab8113 | 5012 | case R_X86_64_PC64: |
6b3db546 | 5013 | case R_X86_64_64: |
80643fbc | 5014 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 5015 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 5016 | |
1788fc08 | 5017 | direct: |
b1e24c02 | 5018 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
5019 | break; |
5020 | ||
9a926d55 | 5021 | /* Don't copy a pc-relative relocation into the output file |
6333bc0d | 5022 | if the symbol needs copy reloc or the symbol is undefined |
04ebc307 | 5023 | when building executable. Copy dynamic function pointer |
aec6b87e L |
5024 | relocations. Don't generate dynamic relocations against |
5025 | resolved undefined weak symbols in PIE. */ | |
0e1862bb | 5026 | if ((bfd_link_pic (info) |
aec6b87e | 5027 | && !(bfd_link_pie (info) |
fd9edc90 | 5028 | && h != NULL |
6333bc0d L |
5029 | && (h->needs_copy |
5030 | || eh->needs_copy | |
5031 | || h->root.type == bfd_link_hash_undefined) | |
d8457a04 L |
5032 | && (IS_X86_64_PCREL_TYPE (r_type) |
5033 | || r_type == R_X86_64_SIZE32 | |
5034 | || r_type == R_X86_64_SIZE64)) | |
4bc6e03a | 5035 | && (h == NULL |
aec6b87e L |
5036 | || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
5037 | && !resolved_to_zero) | |
5038 | || h->root.type != bfd_link_hash_undefweak)) | |
1788fc08 L |
5039 | && ((! IS_X86_64_PCREL_TYPE (r_type) |
5040 | && r_type != R_X86_64_SIZE32 | |
5041 | && r_type != R_X86_64_SIZE64) | |
d8045f23 | 5042 | || ! SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c | 5043 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 5044 | && !bfd_link_pic (info) |
c434dee6 AJ |
5045 | && h != NULL |
5046 | && h->dynindx != -1 | |
aec6b87e L |
5047 | && (!h->non_got_ref |
5048 | || eh->func_pointer_refcount > 0 | |
5049 | || (h->root.type == bfd_link_hash_undefweak | |
5050 | && !resolved_to_zero)) | |
bae420ef L |
5051 | && ((h->def_dynamic && !h->def_regular) |
5052 | /* Undefined weak symbol is bound locally when | |
5053 | PIC is false. */ | |
0f88be7a | 5054 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
5055 | { |
5056 | Elf_Internal_Rela outrel; | |
b34976b6 | 5057 | bfd_boolean skip, relocate; |
c434dee6 | 5058 | asection *sreloc; |
70256ad8 AJ |
5059 | |
5060 | /* When generating a shared object, these relocations | |
5061 | are copied into the output file to be resolved at run | |
407443a3 | 5062 | time. */ |
b34976b6 AM |
5063 | skip = FALSE; |
5064 | relocate = FALSE; | |
70256ad8 | 5065 | |
c629eae0 JJ |
5066 | outrel.r_offset = |
5067 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 5068 | rel->r_offset); |
c629eae0 | 5069 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 5070 | skip = TRUE; |
0fb19cbc | 5071 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 5072 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
5073 | |
5074 | outrel.r_offset += (input_section->output_section->vma | |
5075 | + input_section->output_offset); | |
5076 | ||
5077 | if (skip) | |
0bb2d96a | 5078 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 5079 | |
fd8ab9e5 AJ |
5080 | /* h->dynindx may be -1 if this symbol was marked to |
5081 | become local. */ | |
5082 | else if (h != NULL | |
c434dee6 | 5083 | && h->dynindx != -1 |
d8045f23 | 5084 | && (IS_X86_64_PCREL_TYPE (r_type) |
4e0c91e4 L |
5085 | || !(bfd_link_executable (info) |
5086 | || SYMBOLIC_BIND (info, h)) | |
d8045f23 | 5087 | || ! h->def_regular)) |
70256ad8 | 5088 | { |
351f65ca | 5089 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 5090 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
5091 | } |
5092 | else | |
5093 | { | |
4c10bbaa L |
5094 | /* This symbol is local, or marked to become local. |
5095 | When relocation overflow check is disabled, we | |
5096 | convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
5097 | if (r_type == htab->pointer_r_type | |
5098 | || (r_type == R_X86_64_32 | |
5099 | && info->no_reloc_overflow_check)) | |
607c0e09 | 5100 | { |
b34976b6 | 5101 | relocate = TRUE; |
351f65ca | 5102 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
5103 | outrel.r_addend = relocation + rel->r_addend; |
5104 | } | |
64d25c44 L |
5105 | else if (r_type == R_X86_64_64 |
5106 | && !ABI_64_P (output_bfd)) | |
5107 | { | |
5108 | relocate = TRUE; | |
5109 | outrel.r_info = htab->r_info (0, | |
5110 | R_X86_64_RELATIVE64); | |
5111 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
5112 | /* Check addend overflow. */ |
5113 | if ((outrel.r_addend & 0x80000000) | |
5114 | != (rel->r_addend & 0x80000000)) | |
5115 | { | |
5116 | const char *name; | |
268a8d3a | 5117 | int addend = rel->r_addend; |
8cf0d2dd L |
5118 | if (h && h->root.root.string) |
5119 | name = h->root.root.string; | |
5120 | else | |
5121 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
5122 | sym, NULL); | |
d42c267e AM |
5123 | _bfd_error_handler |
5124 | /* xgettext:c-format */ | |
5125 | (_("%B: addend %s%#x in relocation %s against " | |
5126 | "symbol `%s' at %#Lx in section `%A' is " | |
5127 | "out of range"), | |
5128 | input_bfd, addend < 0 ? "-" : "", addend, | |
5129 | howto->name, name, rel->r_offset, input_section); | |
8cf0d2dd L |
5130 | bfd_set_error (bfd_error_bad_value); |
5131 | return FALSE; | |
5132 | } | |
64d25c44 | 5133 | } |
607c0e09 AS |
5134 | else |
5135 | { | |
5136 | long sindx; | |
5137 | ||
8517fae7 | 5138 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
5139 | sindx = 0; |
5140 | else if (sec == NULL || sec->owner == NULL) | |
5141 | { | |
5142 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 5143 | return FALSE; |
607c0e09 AS |
5144 | } |
5145 | else | |
5146 | { | |
5147 | asection *osec; | |
5148 | ||
74541ad4 AM |
5149 | /* We are turning this relocation into one |
5150 | against a section symbol. It would be | |
5151 | proper to subtract the symbol's value, | |
5152 | osec->vma, from the emitted reloc addend, | |
5153 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
5154 | osec = sec->output_section; |
5155 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
5156 | if (sindx == 0) |
5157 | { | |
5158 | asection *oi = htab->elf.text_index_section; | |
5159 | sindx = elf_section_data (oi)->dynindx; | |
5160 | } | |
5161 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
5162 | } |
5163 | ||
351f65ca | 5164 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
5165 | outrel.r_addend = relocation + rel->r_addend; |
5166 | } | |
70256ad8 AJ |
5167 | } |
5168 | ||
cbe950e9 | 5169 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 5170 | |
62d78908 L |
5171 | if (sreloc == NULL || sreloc->contents == NULL) |
5172 | { | |
5173 | r = bfd_reloc_notsupported; | |
5174 | goto check_relocation_error; | |
5175 | } | |
c434dee6 | 5176 | |
351f65ca | 5177 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
5178 | |
5179 | /* If this reloc is against an external symbol, we do | |
5180 | not want to fiddle with the addend. Otherwise, we | |
5181 | need to include the symbol value so that it becomes | |
5182 | an addend for the dynamic reloc. */ | |
0f88be7a | 5183 | if (! relocate) |
70256ad8 AJ |
5184 | continue; |
5185 | } | |
5186 | ||
5187 | break; | |
5188 | ||
bffbf940 | 5189 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
5190 | case R_X86_64_GOTPC32_TLSDESC: |
5191 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 5192 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
5193 | tls_type = GOT_UNKNOWN; |
5194 | if (h == NULL && local_got_offsets) | |
351f65ca | 5195 | tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 5196 | else if (h != NULL) |
351f65ca | 5197 | tls_type = elf_x86_64_hash_entry (h)->tls_type; |
142411ca | 5198 | |
351f65ca L |
5199 | if (! elf_x86_64_tls_transition (info, input_bfd, |
5200 | input_section, contents, | |
5201 | symtab_hdr, sym_hashes, | |
5202 | &r_type, tls_type, rel, | |
bedfd056 | 5203 | relend, h, r_symndx, TRUE)) |
534a31f6 | 5204 | return FALSE; |
bffbf940 JJ |
5205 | |
5206 | if (r_type == R_X86_64_TPOFF32) | |
5207 | { | |
142411ca L |
5208 | bfd_vma roff = rel->r_offset; |
5209 | ||
bffbf940 | 5210 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 5211 | |
351f65ca | 5212 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 5213 | { |
52bc799a | 5214 | /* GD->LE transition. For 64bit, change |
e2cbcd91 L |
5215 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
5216 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5217 | or | |
5218 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
5219 | .byte 0x66; rex64 | |
5220 | call *__tls_get_addr@GOTPCREL(%rip) | |
5221 | which may be converted to | |
5222 | addr32 call __tls_get_addr | |
52bc799a | 5223 | into: |
e2cbcd91 L |
5224 | movq %fs:0, %rax |
5225 | leaq foo@tpoff(%rax), %rax | |
52bc799a | 5226 | For 32bit, change |
e2cbcd91 L |
5227 | leaq foo@tlsgd(%rip), %rdi |
5228 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5229 | or | |
5230 | leaq foo@tlsgd(%rip), %rdi | |
5231 | .byte 0x66; rex64 | |
5232 | call *__tls_get_addr@GOTPCREL(%rip) | |
5233 | which may be converted to | |
5234 | addr32 call __tls_get_addr | |
52bc799a | 5235 | into: |
e2cbcd91 L |
5236 | movl %fs:0, %eax |
5237 | leaq foo@tpoff(%rax), %rax | |
5c98a14e | 5238 | For largepic, change: |
e2cbcd91 L |
5239 | leaq foo@tlsgd(%rip), %rdi |
5240 | movabsq $__tls_get_addr@pltoff, %rax | |
5241 | addq %r15, %rax | |
5242 | call *%rax | |
5c98a14e | 5243 | into: |
e2cbcd91 L |
5244 | movq %fs:0, %rax |
5245 | leaq foo@tpoff(%rax), %rax | |
5246 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 5247 | int largepic = 0; |
e2cbcd91 | 5248 | if (ABI_64_P (output_bfd)) |
5c98a14e | 5249 | { |
e2cbcd91 L |
5250 | if (contents[roff + 5] == 0xb8) |
5251 | { | |
5252 | memcpy (contents + roff - 3, | |
5253 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
5254 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
5255 | largepic = 1; | |
5256 | } | |
5257 | else | |
5258 | memcpy (contents + roff - 4, | |
5259 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
5260 | 16); | |
5c98a14e | 5261 | } |
52bc799a L |
5262 | else |
5263 | memcpy (contents + roff - 3, | |
5264 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
5265 | 15); | |
eb4ff4d6 | 5266 | bfd_put_32 (output_bfd, |
351f65ca | 5267 | elf_x86_64_tpoff (info, relocation), |
5c98a14e | 5268 | contents + roff + 8 + largepic); |
e2cbcd91 L |
5269 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, |
5270 | R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */ | |
bffbf940 | 5271 | rel++; |
60f2e42e | 5272 | wrel++; |
bffbf940 JJ |
5273 | continue; |
5274 | } | |
351f65ca | 5275 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
5276 | { |
5277 | /* GDesc -> LE transition. | |
5278 | It's originally something like: | |
5279 | leaq x@tlsdesc(%rip), %rax | |
5280 | ||
5281 | Change it to: | |
c9736ba0 | 5282 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 5283 | |
c9736ba0 | 5284 | unsigned int val, type; |
67a4f2b7 | 5285 | |
67a4f2b7 | 5286 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 5287 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
5288 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
5289 | contents + roff - 3); | |
5290 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
5291 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
5292 | contents + roff - 1); | |
eb4ff4d6 | 5293 | bfd_put_32 (output_bfd, |
351f65ca | 5294 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
5295 | contents + roff); |
5296 | continue; | |
5297 | } | |
351f65ca | 5298 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
5299 | { |
5300 | /* GDesc -> LE transition. | |
5301 | It's originally: | |
5302 | call *(%rax) | |
5303 | Turn it into: | |
142411ca | 5304 | xchg %ax,%ax. */ |
10efb593 | 5305 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
5306 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
5307 | continue; | |
5308 | } | |
351f65ca | 5309 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 5310 | { |
bffbf940 | 5311 | /* IE->LE transition: |
cf61b747 | 5312 | For 64bit, originally it can be one of: |
bffbf940 JJ |
5313 | movq foo@gottpoff(%rip), %reg |
5314 | addq foo@gottpoff(%rip), %reg | |
5315 | We change it into: | |
5316 | movq $foo, %reg | |
5317 | leaq foo(%reg), %reg | |
cf61b747 L |
5318 | addq $foo, %reg. |
5319 | For 32bit, originally it can be one of: | |
5320 | movq foo@gottpoff(%rip), %reg | |
5321 | addl foo@gottpoff(%rip), %reg | |
5322 | We change it into: | |
5323 | movq $foo, %reg | |
5324 | leal foo(%reg), %reg | |
5325 | addl $foo, %reg. */ | |
142411ca L |
5326 | |
5327 | unsigned int val, type, reg; | |
5328 | ||
cf61b747 L |
5329 | if (roff >= 3) |
5330 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
5331 | else | |
5332 | val = 0; | |
142411ca L |
5333 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
5334 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 5335 | reg >>= 3; |
bffbf940 JJ |
5336 | if (type == 0x8b) |
5337 | { | |
5338 | /* movq */ | |
5339 | if (val == 0x4c) | |
5340 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 5341 | contents + roff - 3); |
4a4c5f25 L |
5342 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5343 | bfd_put_8 (output_bfd, 0x41, | |
5344 | contents + roff - 3); | |
bffbf940 | 5345 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 5346 | contents + roff - 2); |
bffbf940 | 5347 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 5348 | contents + roff - 1); |
bffbf940 JJ |
5349 | } |
5350 | else if (reg == 4) | |
5351 | { | |
cf61b747 L |
5352 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
5353 | is special */ | |
bffbf940 JJ |
5354 | if (val == 0x4c) |
5355 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 5356 | contents + roff - 3); |
4a4c5f25 L |
5357 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5358 | bfd_put_8 (output_bfd, 0x41, | |
5359 | contents + roff - 3); | |
bffbf940 | 5360 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 5361 | contents + roff - 2); |
bffbf940 | 5362 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 5363 | contents + roff - 1); |
bffbf940 JJ |
5364 | } |
5365 | else | |
5366 | { | |
cf61b747 | 5367 | /* addq/addl -> leaq/leal */ |
bffbf940 JJ |
5368 | if (val == 0x4c) |
5369 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 5370 | contents + roff - 3); |
4a4c5f25 L |
5371 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5372 | bfd_put_8 (output_bfd, 0x45, | |
5373 | contents + roff - 3); | |
bffbf940 | 5374 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 5375 | contents + roff - 2); |
bffbf940 | 5376 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 5377 | contents + roff - 1); |
bffbf940 | 5378 | } |
eb4ff4d6 | 5379 | bfd_put_32 (output_bfd, |
351f65ca | 5380 | elf_x86_64_tpoff (info, relocation), |
142411ca | 5381 | contents + roff); |
bffbf940 JJ |
5382 | continue; |
5383 | } | |
142411ca L |
5384 | else |
5385 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
5386 | } |
5387 | ||
6de2ae4a | 5388 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
5389 | abort (); |
5390 | ||
5391 | if (h != NULL) | |
67a4f2b7 AO |
5392 | { |
5393 | off = h->got.offset; | |
351f65ca | 5394 | offplt = elf_x86_64_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 5395 | } |
bffbf940 JJ |
5396 | else |
5397 | { | |
5398 | if (local_got_offsets == NULL) | |
5399 | abort (); | |
5400 | ||
5401 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 5402 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
5403 | } |
5404 | ||
5405 | if ((off & 1) != 0) | |
5406 | off &= ~1; | |
26e41594 | 5407 | else |
bffbf940 JJ |
5408 | { |
5409 | Elf_Internal_Rela outrel; | |
bffbf940 | 5410 | int dr_type, indx; |
67a4f2b7 | 5411 | asection *sreloc; |
bffbf940 | 5412 | |
6de2ae4a | 5413 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
5414 | abort (); |
5415 | ||
67a4f2b7 AO |
5416 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
5417 | ||
5418 | if (GOT_TLS_GDESC_P (tls_type)) | |
5419 | { | |
351f65ca | 5420 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 5421 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
5422 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
5423 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
5424 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
5425 | + offplt |
5426 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 5427 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 5428 | if (indx == 0) |
351f65ca | 5429 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
67a4f2b7 AO |
5430 | else |
5431 | outrel.r_addend = 0; | |
351f65ca | 5432 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
5433 | } |
5434 | ||
6de2ae4a | 5435 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 5436 | |
6de2ae4a L |
5437 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5438 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 5439 | |
67a4f2b7 | 5440 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 5441 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
5442 | else if (GOT_TLS_GDESC_P (tls_type)) |
5443 | goto dr_done; | |
bffbf940 JJ |
5444 | else |
5445 | dr_type = R_X86_64_TPOFF64; | |
5446 | ||
6de2ae4a | 5447 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 5448 | outrel.r_addend = 0; |
67a4f2b7 AO |
5449 | if ((dr_type == R_X86_64_TPOFF64 |
5450 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
351f65ca L |
5451 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
5452 | outrel.r_info = htab->r_info (indx, dr_type); | |
bffbf940 | 5453 | |
351f65ca | 5454 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 5455 | |
67a4f2b7 | 5456 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
5457 | { |
5458 | if (indx == 0) | |
5459 | { | |
d40d037c | 5460 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 5461 | bfd_put_64 (output_bfd, |
351f65ca | 5462 | relocation - elf_x86_64_dtpoff_base (info), |
6de2ae4a | 5463 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
5464 | } |
5465 | else | |
5466 | { | |
5467 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5468 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5469 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
5470 | R_X86_64_DTPOFF64); |
5471 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 5472 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 5473 | &outrel); |
bffbf940 JJ |
5474 | } |
5475 | } | |
5476 | ||
67a4f2b7 | 5477 | dr_done: |
bffbf940 JJ |
5478 | if (h != NULL) |
5479 | h->got.offset |= 1; | |
5480 | else | |
5481 | local_got_offsets[r_symndx] |= 1; | |
5482 | } | |
5483 | ||
67a4f2b7 AO |
5484 | if (off >= (bfd_vma) -2 |
5485 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 5486 | abort (); |
351f65ca | 5487 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 5488 | { |
67a4f2b7 AO |
5489 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
5490 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
5491 | relocation = htab->elf.sgotplt->output_section->vma |
5492 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
5493 | + offplt + htab->sgotplt_jump_table_size; |
5494 | else | |
6de2ae4a L |
5495 | relocation = htab->elf.sgot->output_section->vma |
5496 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5497 | unresolved_reloc = FALSE; |
bffbf940 | 5498 | } |
142411ca | 5499 | else |
67a4f2b7 | 5500 | { |
142411ca | 5501 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 5502 | |
351f65ca | 5503 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 5504 | { |
52bc799a | 5505 | /* GD->IE transition. For 64bit, change |
e2cbcd91 L |
5506 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
5507 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5508 | or | |
5509 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
5510 | .byte 0x66; rex64 | |
5511 | call *__tls_get_addr@GOTPCREL(%rip | |
5512 | which may be converted to | |
5513 | addr32 call __tls_get_addr | |
52bc799a | 5514 | into: |
e2cbcd91 L |
5515 | movq %fs:0, %rax |
5516 | addq foo@gottpoff(%rip), %rax | |
52bc799a | 5517 | For 32bit, change |
e2cbcd91 L |
5518 | leaq foo@tlsgd(%rip), %rdi |
5519 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5520 | or | |
5521 | leaq foo@tlsgd(%rip), %rdi | |
5522 | .byte 0x66; rex64; | |
5523 | call *__tls_get_addr@GOTPCREL(%rip) | |
5524 | which may be converted to | |
5525 | addr32 call __tls_get_addr | |
52bc799a | 5526 | into: |
e2cbcd91 L |
5527 | movl %fs:0, %eax |
5528 | addq foo@gottpoff(%rip), %rax | |
5c98a14e | 5529 | For largepic, change: |
e2cbcd91 L |
5530 | leaq foo@tlsgd(%rip), %rdi |
5531 | movabsq $__tls_get_addr@pltoff, %rax | |
5532 | addq %r15, %rax | |
5533 | call *%rax | |
5c98a14e | 5534 | into: |
e2cbcd91 L |
5535 | movq %fs:0, %rax |
5536 | addq foo@gottpoff(%rax), %rax | |
5537 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 5538 | int largepic = 0; |
e2cbcd91 | 5539 | if (ABI_64_P (output_bfd)) |
5c98a14e | 5540 | { |
e2cbcd91 L |
5541 | if (contents[roff + 5] == 0xb8) |
5542 | { | |
5543 | memcpy (contents + roff - 3, | |
5544 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
5545 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
5546 | largepic = 1; | |
5547 | } | |
5548 | else | |
5549 | memcpy (contents + roff - 4, | |
5550 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
5551 | 16); | |
5c98a14e | 5552 | } |
52bc799a L |
5553 | else |
5554 | memcpy (contents + roff - 3, | |
5555 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
5556 | 15); | |
142411ca | 5557 | |
6de2ae4a L |
5558 | relocation = (htab->elf.sgot->output_section->vma |
5559 | + htab->elf.sgot->output_offset + off | |
142411ca | 5560 | - roff |
5c98a14e | 5561 | - largepic |
142411ca L |
5562 | - input_section->output_section->vma |
5563 | - input_section->output_offset | |
5564 | - 12); | |
5565 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
5566 | contents + roff + 8 + largepic); |
5567 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 5568 | rel++; |
60f2e42e | 5569 | wrel++; |
142411ca L |
5570 | continue; |
5571 | } | |
351f65ca | 5572 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
5573 | { |
5574 | /* GDesc -> IE transition. | |
5575 | It's originally something like: | |
5576 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 5577 | |
142411ca | 5578 | Change it to: |
c9736ba0 | 5579 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 5580 | |
142411ca L |
5581 | /* Now modify the instruction as appropriate. To |
5582 | turn a leaq into a movq in the form we use it, it | |
5583 | suffices to change the second byte from 0x8d to | |
5584 | 0x8b. */ | |
5585 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
5586 | ||
5587 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
5588 | htab->elf.sgot->output_section->vma |
5589 | + htab->elf.sgot->output_offset + off | |
142411ca L |
5590 | - rel->r_offset |
5591 | - input_section->output_section->vma | |
5592 | - input_section->output_offset | |
5593 | - 4, | |
5594 | contents + roff); | |
5595 | continue; | |
5596 | } | |
351f65ca | 5597 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
5598 | { |
5599 | /* GDesc -> IE transition. | |
5600 | It's originally: | |
5601 | call *(%rax) | |
5602 | ||
5603 | Change it to: | |
c9736ba0 | 5604 | xchg %ax, %ax. */ |
142411ca | 5605 | |
142411ca L |
5606 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
5607 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
5608 | continue; | |
5609 | } | |
5610 | else | |
5611 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 5612 | } |
bffbf940 JJ |
5613 | break; |
5614 | ||
5615 | case R_X86_64_TLSLD: | |
351f65ca L |
5616 | if (! elf_x86_64_tls_transition (info, input_bfd, |
5617 | input_section, contents, | |
5618 | symtab_hdr, sym_hashes, | |
bedfd056 L |
5619 | &r_type, GOT_UNKNOWN, rel, |
5620 | relend, h, r_symndx, TRUE)) | |
142411ca | 5621 | return FALSE; |
a3fadc9a | 5622 | |
142411ca L |
5623 | if (r_type != R_X86_64_TLSLD) |
5624 | { | |
bffbf940 | 5625 | /* LD->LE transition: |
e2cbcd91 L |
5626 | leaq foo@tlsld(%rip), %rdi |
5627 | call __tls_get_addr@PLT | |
5628 | For 64bit, we change it into: | |
5629 | .word 0x6666; .byte 0x66; movq %fs:0, %rax | |
5630 | For 32bit, we change it into: | |
5631 | nopl 0x0(%rax); movl %fs:0, %eax | |
5632 | Or | |
5633 | leaq foo@tlsld(%rip), %rdi; | |
5634 | call *__tls_get_addr@GOTPCREL(%rip) | |
5635 | which may be converted to | |
5636 | addr32 call __tls_get_addr | |
52bc799a | 5637 | For 64bit, we change it into: |
e2cbcd91 | 5638 | .word 0x6666; .word 0x6666; movq %fs:0, %rax |
52bc799a | 5639 | For 32bit, we change it into: |
e2cbcd91 | 5640 | nopw 0x0(%rax); movl %fs:0, %eax |
5c98a14e | 5641 | For largepic, change: |
e2cbcd91 L |
5642 | leaq foo@tlsgd(%rip), %rdi |
5643 | movabsq $__tls_get_addr@pltoff, %rax | |
5644 | addq %rbx, %rax | |
5645 | call *%rax | |
5646 | into | |
5647 | data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
5648 | movq %fs:0, %eax */ | |
142411ca L |
5649 | |
5650 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
e2cbcd91 L |
5651 | if (ABI_64_P (output_bfd)) |
5652 | { | |
5653 | if (contents[rel->r_offset + 5] == 0xb8) | |
5654 | memcpy (contents + rel->r_offset - 3, | |
5655 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
5656 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
5657 | else if (contents[rel->r_offset + 4] == 0xff | |
5658 | || contents[rel->r_offset + 4] == 0x67) | |
5659 | memcpy (contents + rel->r_offset - 3, | |
5660 | "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", | |
5661 | 13); | |
5662 | else | |
5663 | memcpy (contents + rel->r_offset - 3, | |
5664 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
5665 | } | |
52bc799a | 5666 | else |
e2cbcd91 L |
5667 | { |
5668 | if (contents[rel->r_offset + 4] == 0xff) | |
5669 | memcpy (contents + rel->r_offset - 3, | |
5670 | "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", | |
5671 | 13); | |
5672 | else | |
5673 | memcpy (contents + rel->r_offset - 3, | |
5674 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
5675 | } | |
5676 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX | |
5677 | and R_X86_64_PLTOFF64. */ | |
bffbf940 | 5678 | rel++; |
60f2e42e | 5679 | wrel++; |
bffbf940 JJ |
5680 | continue; |
5681 | } | |
5682 | ||
6de2ae4a | 5683 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
5684 | abort (); |
5685 | ||
5686 | off = htab->tls_ld_got.offset; | |
5687 | if (off & 1) | |
5688 | off &= ~1; | |
5689 | else | |
5690 | { | |
5691 | Elf_Internal_Rela outrel; | |
bffbf940 | 5692 | |
6de2ae4a | 5693 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
5694 | abort (); |
5695 | ||
6de2ae4a L |
5696 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5697 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
5698 | |
5699 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5700 | htab->elf.sgot->contents + off); |
bffbf940 | 5701 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 5702 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5703 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 5704 | outrel.r_addend = 0; |
351f65ca | 5705 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 5706 | &outrel); |
bffbf940 JJ |
5707 | htab->tls_ld_got.offset |= 1; |
5708 | } | |
6de2ae4a L |
5709 | relocation = htab->elf.sgot->output_section->vma |
5710 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5711 | unresolved_reloc = FALSE; |
bffbf940 JJ |
5712 | break; |
5713 | ||
5714 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
5715 | if (!bfd_link_executable (info) |
5716 | || (input_section->flags & SEC_CODE) == 0) | |
351f65ca | 5717 | relocation -= elf_x86_64_dtpoff_base (info); |
bffbf940 | 5718 | else |
351f65ca | 5719 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5720 | break; |
5721 | ||
5722 | case R_X86_64_TPOFF32: | |
6769d501 | 5723 | case R_X86_64_TPOFF64: |
0e1862bb | 5724 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 5725 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5726 | break; |
5727 | ||
a69ed7f7 L |
5728 | case R_X86_64_DTPOFF64: |
5729 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
5730 | relocation -= elf_x86_64_dtpoff_base (info); | |
5731 | break; | |
5732 | ||
70256ad8 AJ |
5733 | default: |
5734 | break; | |
5735 | } | |
8d88c4ca | 5736 | |
239e1f3a AM |
5737 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
5738 | because such sections are not SEC_ALLOC and thus ld.so will | |
5739 | not process them. */ | |
c434dee6 | 5740 | if (unresolved_reloc |
239e1f3a | 5741 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
5742 | && h->def_dynamic) |
5743 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
5744 | rel->r_offset) != (bfd_vma) -1) | |
a040981f | 5745 | { |
7073b5b9 L |
5746 | switch (r_type) |
5747 | { | |
5748 | case R_X86_64_32S: | |
a5b4ee94 L |
5749 | sec = h->root.u.def.section; |
5750 | if ((info->nocopyreloc | |
5751 | || (eh->def_protected | |
5752 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
5753 | && !(h->root.u.def.section->flags & SEC_CODE)) |
5754 | return elf_x86_64_need_pic (info, input_bfd, input_section, | |
5755 | h, NULL, NULL, howto); | |
5756 | /* Fall through. */ | |
5757 | ||
5758 | default: | |
5759 | _bfd_error_handler | |
5760 | /* xgettext:c-format */ | |
5761 | (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"), | |
5762 | input_bfd, | |
5763 | input_section, | |
5764 | rel->r_offset, | |
5765 | howto->name, | |
5766 | h->root.root.string); | |
5767 | return FALSE; | |
5768 | } | |
a040981f | 5769 | } |
c434dee6 | 5770 | |
cbe950e9 | 5771 | do_relocation: |
8d88c4ca | 5772 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
5773 | contents, rel->r_offset, |
5774 | relocation, rel->r_addend); | |
8d88c4ca | 5775 | |
62d78908 | 5776 | check_relocation_error: |
8d88c4ca | 5777 | if (r != bfd_reloc_ok) |
8da6118f | 5778 | { |
c434dee6 AJ |
5779 | const char *name; |
5780 | ||
5781 | if (h != NULL) | |
5782 | name = h->root.root.string; | |
5783 | else | |
8da6118f | 5784 | { |
c434dee6 AJ |
5785 | name = bfd_elf_string_from_elf_section (input_bfd, |
5786 | symtab_hdr->sh_link, | |
5787 | sym->st_name); | |
5788 | if (name == NULL) | |
b34976b6 | 5789 | return FALSE; |
c434dee6 AJ |
5790 | if (*name == '\0') |
5791 | name = bfd_section_name (input_bfd, sec); | |
5792 | } | |
5793 | ||
5794 | if (r == bfd_reloc_overflow) | |
1a72702b AM |
5795 | (*info->callbacks->reloc_overflow) |
5796 | (info, (h ? &h->root : NULL), name, howto->name, | |
5797 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
c434dee6 AJ |
5798 | else |
5799 | { | |
4eca0228 | 5800 | _bfd_error_handler |
695344c0 | 5801 | /* xgettext:c-format */ |
d42c267e | 5802 | (_("%B(%A+%#Lx): reloc against `%s': error %d"), |
d003868e | 5803 | input_bfd, input_section, |
d42c267e | 5804 | rel->r_offset, name, (int) r); |
b34976b6 | 5805 | return FALSE; |
8da6118f KH |
5806 | } |
5807 | } | |
60f2e42e L |
5808 | |
5809 | if (wrel != rel) | |
5810 | *wrel = *rel; | |
5811 | } | |
5812 | ||
5813 | if (wrel != rel) | |
5814 | { | |
5815 | Elf_Internal_Shdr *rel_hdr; | |
5816 | size_t deleted = rel - wrel; | |
5817 | ||
5818 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
5819 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5820 | if (rel_hdr->sh_size == 0) | |
5821 | { | |
5822 | /* It is too late to remove an empty reloc section. Leave | |
5823 | one NONE reloc. | |
5824 | ??? What is wrong with an empty section??? */ | |
5825 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
5826 | deleted -= 1; | |
5827 | } | |
5828 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
5829 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5830 | input_section->reloc_count -= deleted; | |
8d88c4ca | 5831 | } |
70256ad8 | 5832 | |
b34976b6 | 5833 | return TRUE; |
70256ad8 AJ |
5834 | } |
5835 | ||
5836 | /* Finish up dynamic symbol handling. We set the contents of various | |
5837 | dynamic sections here. */ | |
5838 | ||
b34976b6 | 5839 | static bfd_boolean |
351f65ca L |
5840 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
5841 | struct bfd_link_info *info, | |
5842 | struct elf_link_hash_entry *h, | |
aec6b87e | 5843 | Elf_Internal_Sym *sym) |
70256ad8 | 5844 | { |
351f65ca | 5845 | struct elf_x86_64_link_hash_table *htab; |
f2c29a16 | 5846 | bfd_boolean use_plt_second; |
dd7e64d4 | 5847 | struct elf_x86_64_link_hash_entry *eh; |
aec6b87e | 5848 | bfd_boolean local_undefweak; |
70256ad8 | 5849 | |
351f65ca | 5850 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
5851 | if (htab == NULL) |
5852 | return FALSE; | |
70256ad8 | 5853 | |
f2c29a16 L |
5854 | /* Use the second PLT section only if there is .plt section. */ |
5855 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
0ff2b86e | 5856 | |
dd7e64d4 | 5857 | eh = (struct elf_x86_64_link_hash_entry *) h; |
9e9821dd L |
5858 | if (eh->no_finish_dynamic_symbol) |
5859 | abort (); | |
dd7e64d4 | 5860 | |
aec6b87e L |
5861 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
5862 | resolved undefined weak symbols in executable so that their | |
5863 | references have value 0 at run-time. */ | |
e62b9723 L |
5864 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
5865 | eh->has_got_reloc, | |
5866 | eh); | |
aec6b87e | 5867 | |
70256ad8 AJ |
5868 | if (h->plt.offset != (bfd_vma) -1) |
5869 | { | |
70256ad8 | 5870 | bfd_vma plt_index; |
38b12349 | 5871 | bfd_vma got_offset, plt_offset; |
70256ad8 | 5872 | Elf_Internal_Rela rela; |
947216bf | 5873 | bfd_byte *loc; |
0ff2b86e | 5874 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 5875 | const struct elf_backend_data *bed; |
5974eba6 | 5876 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
5877 | |
5878 | /* When building a static executable, use .iplt, .igot.plt and | |
5879 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 5880 | if (htab->elf.splt != NULL) |
cbe950e9 | 5881 | { |
6de2ae4a L |
5882 | plt = htab->elf.splt; |
5883 | gotplt = htab->elf.sgotplt; | |
5884 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
5885 | } |
5886 | else | |
5887 | { | |
6de2ae4a L |
5888 | plt = htab->elf.iplt; |
5889 | gotplt = htab->elf.igotplt; | |
5890 | relplt = htab->elf.irelplt; | |
cbe950e9 | 5891 | } |
70256ad8 AJ |
5892 | |
5893 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 5894 | it up. */ |
cbe950e9 | 5895 | if ((h->dynindx == -1 |
aec6b87e | 5896 | && !local_undefweak |
0e1862bb | 5897 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
5898 | && h->def_regular |
5899 | && h->type == STT_GNU_IFUNC)) | |
5900 | || plt == NULL | |
5901 | || gotplt == NULL | |
5902 | || relplt == NULL) | |
cec7f46a | 5903 | abort (); |
70256ad8 AJ |
5904 | |
5905 | /* Get the index in the procedure linkage table which | |
5906 | corresponds to this symbol. This is the index of this symbol | |
5907 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 5908 | first entry in the procedure linkage table is reserved. |
6bbec505 | 5909 | |
cbe950e9 | 5910 | Get the offset into the .got table of the entry that |
407443a3 | 5911 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
5912 | bytes. The first three are reserved for the dynamic linker. |
5913 | ||
5914 | For static executables, we don't reserve anything. */ | |
5915 | ||
6de2ae4a | 5916 | if (plt == htab->elf.splt) |
cbe950e9 | 5917 | { |
38b12349 L |
5918 | got_offset = (h->plt.offset / htab->plt.plt_entry_size |
5919 | - htab->plt.has_plt0); | |
e1f98742 | 5920 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
5921 | } |
5922 | else | |
5923 | { | |
38b12349 | 5924 | got_offset = h->plt.offset / htab->plt.plt_entry_size; |
e1f98742 | 5925 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 5926 | } |
70256ad8 | 5927 | |
38b12349 L |
5928 | /* Fill in the entry in the procedure linkage table. */ |
5929 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, | |
5930 | htab->plt.plt_entry_size); | |
f2c29a16 | 5931 | if (use_plt_second) |
0ff2b86e | 5932 | { |
f2c29a16 | 5933 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
38b12349 L |
5934 | htab->non_lazy_plt->plt_entry, |
5935 | htab->non_lazy_plt->plt_entry_size); | |
0ff2b86e | 5936 | |
f2c29a16 L |
5937 | resolved_plt = htab->plt_second; |
5938 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
5939 | } |
5940 | else | |
5941 | { | |
0ff2b86e L |
5942 | resolved_plt = plt; |
5943 | plt_offset = h->plt.offset; | |
5944 | } | |
eed180f8 RM |
5945 | |
5946 | /* Insert the relocation positions of the plt section. */ | |
5947 | ||
5948 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
5949 | subtracting the size of that instruction. */ | |
ab7fede8 L |
5950 | plt_got_pcrel_offset = (gotplt->output_section->vma |
5951 | + gotplt->output_offset | |
5952 | + got_offset | |
5953 | - resolved_plt->output_section->vma | |
5954 | - resolved_plt->output_offset | |
5955 | - plt_offset | |
38b12349 | 5956 | - htab->plt.plt_got_insn_size); |
ab7fede8 L |
5957 | |
5958 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 5959 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
695344c0 | 5960 | /* xgettext:c-format */ |
ab7fede8 L |
5961 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"), |
5962 | output_bfd, h->root.root.string); | |
5963 | ||
5964 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
38b12349 L |
5965 | (resolved_plt->contents + plt_offset |
5966 | + htab->plt.plt_got_offset)); | |
cbe950e9 | 5967 | |
653165cc | 5968 | /* Fill in the entry in the global offset table, initially this |
aec6b87e L |
5969 | points to the second part of the PLT entry. Leave the entry |
5970 | as zero for undefined weak symbol in PIE. No PLT relocation | |
5971 | against undefined weak symbol in PIE. */ | |
5972 | if (!local_undefweak) | |
cbe950e9 | 5973 | { |
38b12349 L |
5974 | if (htab->plt.has_plt0) |
5975 | bfd_put_64 (output_bfd, (plt->output_section->vma | |
5976 | + plt->output_offset | |
5977 | + h->plt.offset | |
5978 | + htab->lazy_plt->plt_lazy_offset), | |
5979 | gotplt->contents + got_offset); | |
aec6b87e L |
5980 | |
5981 | /* Fill in the entry in the .rela.plt section. */ | |
5982 | rela.r_offset = (gotplt->output_section->vma | |
5983 | + gotplt->output_offset | |
5984 | + got_offset); | |
5985 | if (h->dynindx == -1 | |
5986 | || ((bfd_link_executable (info) | |
5987 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
5988 | && h->def_regular | |
5989 | && h->type == STT_GNU_IFUNC)) | |
5990 | { | |
6322e5c5 L |
5991 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
5992 | h->root.root.string, | |
5993 | h->root.u.def.section->owner); | |
5994 | ||
aec6b87e L |
5995 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
5996 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
5997 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); | |
5998 | rela.r_addend = (h->root.u.def.value | |
5999 | + h->root.u.def.section->output_section->vma | |
6000 | + h->root.u.def.section->output_offset); | |
6001 | /* R_X86_64_IRELATIVE comes last. */ | |
6002 | plt_index = htab->next_irelative_index--; | |
6003 | } | |
6004 | else | |
6005 | { | |
6006 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); | |
6007 | rela.r_addend = 0; | |
6008 | plt_index = htab->next_jump_slot_index++; | |
6009 | } | |
e1f98742 | 6010 | |
38b12349 L |
6011 | /* Don't fill the second and third slots in PLT entry for |
6012 | static executables nor without PLT0. */ | |
6013 | if (plt == htab->elf.splt && htab->plt.has_plt0) | |
aec6b87e | 6014 | { |
38b12349 L |
6015 | bfd_vma plt0_offset |
6016 | = h->plt.offset + htab->lazy_plt->plt_plt_insn_end; | |
aec6b87e L |
6017 | |
6018 | /* Put relocation index. */ | |
6019 | bfd_put_32 (output_bfd, plt_index, | |
6020 | (plt->contents + h->plt.offset | |
38b12349 | 6021 | + htab->lazy_plt->plt_reloc_offset)); |
aec6b87e L |
6022 | |
6023 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
6024 | check relocation index for overflow since branch displacement | |
6025 | will overflow first. */ | |
6026 | if (plt0_offset > 0x80000000) | |
695344c0 | 6027 | /* xgettext:c-format */ |
aec6b87e L |
6028 | info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"), |
6029 | output_bfd, h->root.root.string); | |
6030 | bfd_put_32 (output_bfd, - plt0_offset, | |
38b12349 L |
6031 | (plt->contents + h->plt.offset |
6032 | + htab->lazy_plt->plt_plt_offset)); | |
aec6b87e | 6033 | } |
351f65ca | 6034 | |
aec6b87e L |
6035 | bed = get_elf_backend_data (output_bfd); |
6036 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
6037 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
6038 | } | |
dd7e64d4 L |
6039 | } |
6040 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
6041 | { | |
38b12349 | 6042 | bfd_vma got_offset, plt_offset; |
dd7e64d4 L |
6043 | asection *plt, *got; |
6044 | bfd_boolean got_after_plt; | |
6045 | int32_t got_pcrel_offset; | |
dd7e64d4 L |
6046 | |
6047 | /* Set the entry in the GOT procedure linkage table. */ | |
6048 | plt = htab->plt_got; | |
6049 | got = htab->elf.sgot; | |
6050 | got_offset = h->got.offset; | |
6051 | ||
6052 | if (got_offset == (bfd_vma) -1 | |
e492d2f8 | 6053 | || (h->type == STT_GNU_IFUNC && h->def_regular) |
dd7e64d4 L |
6054 | || plt == NULL |
6055 | || got == NULL) | |
6056 | abort (); | |
70256ad8 | 6057 | |
38b12349 | 6058 | /* Use the non-lazy PLT entry template for the GOT PLT since they |
dd7e64d4 | 6059 | are the identical. */ |
dd7e64d4 L |
6060 | /* Fill in the entry in the GOT procedure linkage table. */ |
6061 | plt_offset = eh->plt_got.offset; | |
6062 | memcpy (plt->contents + plt_offset, | |
38b12349 L |
6063 | htab->non_lazy_plt->plt_entry, |
6064 | htab->non_lazy_plt->plt_entry_size); | |
dd7e64d4 L |
6065 | |
6066 | /* Put offset the PC-relative instruction referring to the GOT | |
6067 | entry, subtracting the size of that instruction. */ | |
6068 | got_pcrel_offset = (got->output_section->vma | |
6069 | + got->output_offset | |
6070 | + got_offset | |
6071 | - plt->output_section->vma | |
6072 | - plt->output_offset | |
6073 | - plt_offset | |
38b12349 | 6074 | - htab->non_lazy_plt->plt_got_insn_size); |
dd7e64d4 L |
6075 | |
6076 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
6077 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
6078 | if ((got_after_plt && got_pcrel_offset < 0) | |
6079 | || (!got_after_plt && got_pcrel_offset > 0)) | |
695344c0 | 6080 | /* xgettext:c-format */ |
dd7e64d4 L |
6081 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"), |
6082 | output_bfd, h->root.root.string); | |
6083 | ||
6084 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
38b12349 L |
6085 | (plt->contents + plt_offset |
6086 | + htab->non_lazy_plt->plt_got_offset)); | |
dd7e64d4 L |
6087 | } |
6088 | ||
aec6b87e L |
6089 | if (!local_undefweak |
6090 | && !h->def_regular | |
dd7e64d4 L |
6091 | && (h->plt.offset != (bfd_vma) -1 |
6092 | || eh->plt_got.offset != (bfd_vma) -1)) | |
6093 | { | |
6094 | /* Mark the symbol as undefined, rather than as defined in | |
6095 | the .plt section. Leave the value if there were any | |
6096 | relocations where pointer equality matters (this is a clue | |
6097 | for the dynamic linker, to make function pointer | |
6098 | comparisons work between an application and shared | |
6099 | library), otherwise set it to zero. If a function is only | |
6100 | called from a binary, there is no need to slow down | |
6101 | shared libraries because of that. */ | |
6102 | sym->st_shndx = SHN_UNDEF; | |
6103 | if (!h->pointer_equality_needed) | |
6104 | sym->st_value = 0; | |
70256ad8 AJ |
6105 | } |
6106 | ||
aec6b87e L |
6107 | /* Don't generate dynamic GOT relocation against undefined weak |
6108 | symbol in executable. */ | |
bffbf940 | 6109 | if (h->got.offset != (bfd_vma) -1 |
351f65ca | 6110 | && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type) |
aec6b87e L |
6111 | && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE |
6112 | && !local_undefweak) | |
053579d7 | 6113 | { |
053579d7 | 6114 | Elf_Internal_Rela rela; |
233cc9c1 | 6115 | asection *relgot = htab->elf.srelgot; |
053579d7 AJ |
6116 | |
6117 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 6118 | up. */ |
6de2ae4a | 6119 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 6120 | abort (); |
053579d7 | 6121 | |
6de2ae4a L |
6122 | rela.r_offset = (htab->elf.sgot->output_section->vma |
6123 | + htab->elf.sgot->output_offset | |
dc810e39 | 6124 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
6125 | |
6126 | /* If this is a static link, or it is a -Bsymbolic link and the | |
6127 | symbol is defined locally or was forced to be local because | |
6128 | of a version file, we just want to emit a RELATIVE reloc. | |
6129 | The entry in the global offset table will already have been | |
6130 | initialized in the relocate_section function. */ | |
710ab287 | 6131 | if (h->def_regular |
0018b0a3 L |
6132 | && h->type == STT_GNU_IFUNC) |
6133 | { | |
233cc9c1 L |
6134 | if (h->plt.offset == (bfd_vma) -1) |
6135 | { | |
6136 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
6137 | if (htab->elf.splt == NULL) | |
6138 | { | |
6139 | /* use .rel[a].iplt section to store .got relocations | |
6140 | in static executable. */ | |
6141 | relgot = htab->elf.irelplt; | |
6142 | } | |
6143 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
6144 | { | |
6322e5c5 L |
6145 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
6146 | output_bfd, | |
6147 | h->root.root.string, | |
6148 | h->root.u.def.section->owner); | |
6149 | ||
233cc9c1 L |
6150 | rela.r_info = htab->r_info (0, |
6151 | R_X86_64_IRELATIVE); | |
6152 | rela.r_addend = (h->root.u.def.value | |
6153 | + h->root.u.def.section->output_section->vma | |
6154 | + h->root.u.def.section->output_offset); | |
6155 | } | |
6156 | else | |
6157 | goto do_glob_dat; | |
6158 | } | |
6159 | else if (bfd_link_pic (info)) | |
710ab287 L |
6160 | { |
6161 | /* Generate R_X86_64_GLOB_DAT. */ | |
6162 | goto do_glob_dat; | |
6163 | } | |
6164 | else | |
6165 | { | |
90d60710 | 6166 | asection *plt; |
aab82f4c | 6167 | bfd_vma plt_offset; |
90d60710 | 6168 | |
710ab287 L |
6169 | if (!h->pointer_equality_needed) |
6170 | abort (); | |
6171 | ||
6172 | /* For non-shared object, we can't use .got.plt, which | |
6173 | contains the real function addres if we need pointer | |
6174 | equality. We load the GOT entry with the PLT entry. */ | |
f2c29a16 | 6175 | if (htab->plt_second != NULL) |
aab82f4c | 6176 | { |
f2c29a16 L |
6177 | plt = htab->plt_second; |
6178 | plt_offset = eh->plt_second.offset; | |
aab82f4c L |
6179 | } |
6180 | else | |
6181 | { | |
6182 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
6183 | plt_offset = h->plt.offset; | |
6184 | } | |
710ab287 L |
6185 | bfd_put_64 (output_bfd, (plt->output_section->vma |
6186 | + plt->output_offset | |
aab82f4c | 6187 | + plt_offset), |
6de2ae4a | 6188 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
6189 | return TRUE; |
6190 | } | |
0018b0a3 | 6191 | } |
0e1862bb | 6192 | else if (bfd_link_pic (info) |
0018b0a3 | 6193 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
053579d7 | 6194 | { |
41bed6dd L |
6195 | if (!h->def_regular) |
6196 | return FALSE; | |
cc78d0af | 6197 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 6198 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
6199 | rela.r_addend = (h->root.u.def.value |
6200 | + h->root.u.def.section->output_section->vma | |
6201 | + h->root.u.def.section->output_offset); | |
6202 | } | |
6203 | else | |
6204 | { | |
6205 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 6206 | do_glob_dat: |
c434dee6 | 6207 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 6208 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 6209 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
6210 | rela.r_addend = 0; |
6211 | } | |
6212 | ||
233cc9c1 | 6213 | elf_append_rela (output_bfd, relgot, &rela); |
053579d7 AJ |
6214 | } |
6215 | ||
f5385ebf | 6216 | if (h->needs_copy) |
70256ad8 | 6217 | { |
70256ad8 | 6218 | Elf_Internal_Rela rela; |
5474d94f | 6219 | asection *s; |
70256ad8 AJ |
6220 | |
6221 | /* This symbol needs a copy reloc. Set it up. */ | |
6222 | ||
c434dee6 AJ |
6223 | if (h->dynindx == -1 |
6224 | || (h->root.type != bfd_link_hash_defined | |
6225 | && h->root.type != bfd_link_hash_defweak) | |
5474d94f AM |
6226 | || htab->elf.srelbss == NULL |
6227 | || htab->elf.sreldynrelro == NULL) | |
c434dee6 | 6228 | abort (); |
70256ad8 AJ |
6229 | |
6230 | rela.r_offset = (h->root.u.def.value | |
6231 | + h->root.u.def.section->output_section->vma | |
6232 | + h->root.u.def.section->output_offset); | |
351f65ca | 6233 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 6234 | rela.r_addend = 0; |
afbf7e8e | 6235 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
6236 | s = htab->elf.sreldynrelro; |
6237 | else | |
6238 | s = htab->elf.srelbss; | |
6239 | elf_append_rela (output_bfd, s, &rela); | |
70256ad8 AJ |
6240 | } |
6241 | ||
b34976b6 | 6242 | return TRUE; |
70256ad8 AJ |
6243 | } |
6244 | ||
c25bc9fc L |
6245 | /* Finish up local dynamic symbol handling. We set the contents of |
6246 | various dynamic sections here. */ | |
6247 | ||
6248 | static bfd_boolean | |
351f65ca | 6249 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
6250 | { |
6251 | struct elf_link_hash_entry *h | |
6252 | = (struct elf_link_hash_entry *) *slot; | |
6253 | struct bfd_link_info *info | |
eed180f8 | 6254 | = (struct bfd_link_info *) inf; |
c25bc9fc | 6255 | |
351f65ca | 6256 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
c25bc9fc L |
6257 | info, h, NULL); |
6258 | } | |
6259 | ||
aec6b87e L |
6260 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
6261 | here since undefined weak symbol may not be dynamic and may not be | |
6262 | called for elf_x86_64_finish_dynamic_symbol. */ | |
6263 | ||
6264 | static bfd_boolean | |
6265 | elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
6266 | void *inf) | |
6267 | { | |
6268 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
6269 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
6270 | ||
6271 | if (h->root.type != bfd_link_hash_undefweak | |
6272 | || h->dynindx != -1) | |
6273 | return TRUE; | |
6274 | ||
6275 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, | |
6276 | info, h, NULL); | |
6277 | } | |
6278 | ||
c434dee6 AJ |
6279 | /* Used to decide how to sort relocs in an optimal manner for the |
6280 | dynamic linker, before writing them out. */ | |
6281 | ||
6282 | static enum elf_reloc_type_class | |
cae1fbbb | 6283 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
6284 | const asection *rel_sec ATTRIBUTE_UNUSED, |
6285 | const Elf_Internal_Rela *rela) | |
c434dee6 | 6286 | { |
cae1fbbb L |
6287 | bfd *abfd = info->output_bfd; |
6288 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
6289 | struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info); | |
cae1fbbb | 6290 | |
d9e3b590 L |
6291 | if (htab->elf.dynsym != NULL |
6292 | && htab->elf.dynsym->contents != NULL) | |
6293 | { | |
6294 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
6295 | dynamic symbols. */ | |
6296 | unsigned long r_symndx = htab->r_sym (rela->r_info); | |
897463b1 L |
6297 | if (r_symndx != STN_UNDEF) |
6298 | { | |
6299 | Elf_Internal_Sym sym; | |
6300 | if (!bed->s->swap_symbol_in (abfd, | |
6301 | (htab->elf.dynsym->contents | |
6302 | + r_symndx * bed->s->sizeof_sym), | |
6303 | 0, &sym)) | |
6304 | abort (); | |
d9e3b590 | 6305 | |
897463b1 L |
6306 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
6307 | return reloc_class_ifunc; | |
6308 | } | |
d9e3b590 | 6309 | } |
cae1fbbb | 6310 | |
351f65ca | 6311 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 | 6312 | { |
c428ce9d L |
6313 | case R_X86_64_IRELATIVE: |
6314 | return reloc_class_ifunc; | |
c434dee6 | 6315 | case R_X86_64_RELATIVE: |
1da80baa | 6316 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
6317 | return reloc_class_relative; |
6318 | case R_X86_64_JUMP_SLOT: | |
6319 | return reloc_class_plt; | |
6320 | case R_X86_64_COPY: | |
6321 | return reloc_class_copy; | |
6322 | default: | |
6323 | return reloc_class_normal; | |
6324 | } | |
6325 | } | |
6326 | ||
70256ad8 AJ |
6327 | /* Finish up the dynamic sections. */ |
6328 | ||
b34976b6 | 6329 | static bfd_boolean |
351f65ca L |
6330 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
6331 | struct bfd_link_info *info) | |
70256ad8 | 6332 | { |
351f65ca | 6333 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
6334 | bfd *dynobj; |
6335 | asection *sdyn; | |
70256ad8 | 6336 | |
351f65ca | 6337 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
6338 | if (htab == NULL) |
6339 | return FALSE; | |
6340 | ||
c434dee6 | 6341 | dynobj = htab->elf.dynobj; |
3d4d4302 | 6342 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
70256ad8 | 6343 | |
c434dee6 | 6344 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 6345 | { |
82e96e07 L |
6346 | bfd_byte *dyncon, *dynconend; |
6347 | const struct elf_backend_data *bed; | |
6348 | bfd_size_type sizeof_dyn; | |
70256ad8 | 6349 | |
6de2ae4a | 6350 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 6351 | abort (); |
70256ad8 | 6352 | |
82e96e07 L |
6353 | bed = get_elf_backend_data (dynobj); |
6354 | sizeof_dyn = bed->s->sizeof_dyn; | |
6355 | dyncon = sdyn->contents; | |
6356 | dynconend = sdyn->contents + sdyn->size; | |
6357 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
6358 | { |
6359 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
6360 | asection *s; |
6361 | ||
82e96e07 | 6362 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
6363 | |
6364 | switch (dyn.d_tag) | |
6365 | { | |
6366 | default: | |
053579d7 | 6367 | continue; |
70256ad8 AJ |
6368 | |
6369 | case DT_PLTGOT: | |
6de2ae4a | 6370 | s = htab->elf.sgotplt; |
8c37241b | 6371 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 6372 | break; |
70256ad8 AJ |
6373 | |
6374 | case DT_JMPREL: | |
6de2ae4a | 6375 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 6376 | break; |
70256ad8 | 6377 | |
c434dee6 | 6378 | case DT_PLTRELSZ: |
6de2ae4a | 6379 | s = htab->elf.srelplt->output_section; |
eea6121a | 6380 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
6381 | break; |
6382 | ||
67a4f2b7 | 6383 | case DT_TLSDESC_PLT: |
6de2ae4a | 6384 | s = htab->elf.splt; |
67a4f2b7 AO |
6385 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
6386 | + htab->tlsdesc_plt; | |
6387 | break; | |
6388 | ||
6389 | case DT_TLSDESC_GOT: | |
6de2ae4a | 6390 | s = htab->elf.sgot; |
67a4f2b7 AO |
6391 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
6392 | + htab->tlsdesc_got; | |
6393 | break; | |
70256ad8 | 6394 | } |
c434dee6 | 6395 | |
82e96e07 | 6396 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
6397 | } |
6398 | ||
6de2ae4a | 6399 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 6400 | { |
eed180f8 | 6401 | elf_section_data (htab->elf.splt->output_section) |
38b12349 | 6402 | ->this_hdr.sh_entsize = htab->plt.plt_entry_size; |
67a4f2b7 | 6403 | |
38b12349 | 6404 | if (htab->plt.has_plt0) |
67a4f2b7 | 6405 | { |
38b12349 L |
6406 | /* Fill in the special first entry in the procedure linkage |
6407 | table. */ | |
6408 | memcpy (htab->elf.splt->contents, | |
6409 | htab->lazy_plt->plt0_entry, | |
6410 | htab->lazy_plt->plt_entry_size); | |
6411 | /* Add offset for pushq GOT+8(%rip), since the instruction | |
6412 | uses 6 bytes subtract this value. */ | |
67a4f2b7 | 6413 | bfd_put_32 (output_bfd, |
6de2ae4a L |
6414 | (htab->elf.sgotplt->output_section->vma |
6415 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 6416 | + 8 |
6de2ae4a L |
6417 | - htab->elf.splt->output_section->vma |
6418 | - htab->elf.splt->output_offset | |
67a4f2b7 | 6419 | - 6), |
38b12349 L |
6420 | (htab->elf.splt->contents |
6421 | + htab->lazy_plt->plt0_got1_offset)); | |
6422 | /* Add offset for the PC-relative instruction accessing | |
6423 | GOT+16, subtracting the offset to the end of that | |
6424 | instruction. */ | |
67a4f2b7 | 6425 | bfd_put_32 (output_bfd, |
38b12349 L |
6426 | (htab->elf.sgotplt->output_section->vma |
6427 | + htab->elf.sgotplt->output_offset | |
6428 | + 16 | |
6de2ae4a L |
6429 | - htab->elf.splt->output_section->vma |
6430 | - htab->elf.splt->output_offset | |
38b12349 L |
6431 | - htab->lazy_plt->plt0_got2_insn_end), |
6432 | (htab->elf.splt->contents | |
6433 | + htab->lazy_plt->plt0_got2_offset)); | |
6434 | ||
6435 | if (htab->tlsdesc_plt) | |
6436 | { | |
6437 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6438 | htab->elf.sgot->contents + htab->tlsdesc_got); | |
6439 | ||
6440 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, | |
6441 | htab->lazy_plt->plt0_entry, | |
6442 | htab->lazy_plt->plt_entry_size); | |
6443 | ||
6444 | /* Add offset for pushq GOT+8(%rip), since the | |
6445 | instruction uses 6 bytes subtract this value. */ | |
6446 | bfd_put_32 (output_bfd, | |
6447 | (htab->elf.sgotplt->output_section->vma | |
6448 | + htab->elf.sgotplt->output_offset | |
6449 | + 8 | |
6450 | - htab->elf.splt->output_section->vma | |
6451 | - htab->elf.splt->output_offset | |
6452 | - htab->tlsdesc_plt | |
6453 | - 6), | |
6454 | (htab->elf.splt->contents | |
6455 | + htab->tlsdesc_plt | |
6456 | + htab->lazy_plt->plt0_got1_offset)); | |
6457 | /* Add offset for the PC-relative instruction accessing | |
6458 | GOT+TDG, where TDG stands for htab->tlsdesc_got, | |
6459 | subtracting the offset to the end of that | |
6460 | instruction. */ | |
6461 | bfd_put_32 (output_bfd, | |
6462 | (htab->elf.sgot->output_section->vma | |
6463 | + htab->elf.sgot->output_offset | |
6464 | + htab->tlsdesc_got | |
6465 | - htab->elf.splt->output_section->vma | |
6466 | - htab->elf.splt->output_offset | |
6467 | - htab->tlsdesc_plt | |
6468 | - htab->lazy_plt->plt0_got2_insn_end), | |
6469 | (htab->elf.splt->contents | |
6470 | + htab->tlsdesc_plt | |
6471 | + htab->lazy_plt->plt0_got2_offset)); | |
6472 | } | |
67a4f2b7 | 6473 | } |
70256ad8 | 6474 | } |
70256ad8 AJ |
6475 | } |
6476 | ||
38b12349 L |
6477 | if (htab->plt_got != NULL && htab->plt_got->size > 0) |
6478 | elf_section_data (htab->plt_got->output_section) | |
6479 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; | |
6480 | ||
f2c29a16 L |
6481 | if (htab->plt_second != NULL && htab->plt_second->size > 0) |
6482 | elf_section_data (htab->plt_second->output_section) | |
38b12349 | 6483 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; |
0ff2b86e | 6484 | |
38b12349 L |
6485 | /* GOT is always created in setup_gnu_properties. But it may not be |
6486 | needed. */ | |
6487 | if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0) | |
70256ad8 | 6488 | { |
56d4289c L |
6489 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
6490 | { | |
4eca0228 | 6491 | _bfd_error_handler |
56d4289c L |
6492 | (_("discarded output section: `%A'"), htab->elf.sgotplt); |
6493 | return FALSE; | |
6494 | } | |
6495 | ||
38b12349 L |
6496 | /* Set the first entry in the global offset table to the address of |
6497 | the dynamic section. */ | |
6498 | if (sdyn == NULL) | |
6499 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); | |
6500 | else | |
6501 | bfd_put_64 (output_bfd, | |
6502 | sdyn->output_section->vma + sdyn->output_offset, | |
6503 | htab->elf.sgotplt->contents); | |
6504 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ | |
6505 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6506 | htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); | |
6507 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6508 | htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
6509 | ||
6510 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize | |
6511 | = GOT_ENTRY_SIZE; | |
c434dee6 | 6512 | } |
70256ad8 | 6513 | |
e41b3a13 | 6514 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
6515 | if (htab->plt_eh_frame != NULL |
6516 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
6517 | { |
6518 | if (htab->elf.splt != NULL | |
6519 | && htab->elf.splt->size != 0 | |
6520 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
6521 | && htab->elf.splt->output_section != NULL | |
6522 | && htab->plt_eh_frame->output_section != NULL) | |
6523 | { | |
6524 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
6525 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
6526 | + htab->plt_eh_frame->output_offset | |
6527 | + PLT_FDE_START_OFFSET; | |
6528 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
6529 | htab->plt_eh_frame->contents | |
6530 | + PLT_FDE_START_OFFSET); | |
6531 | } | |
dbaa2011 | 6532 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
6533 | { |
6534 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
6535 | htab->plt_eh_frame, | |
6536 | htab->plt_eh_frame->contents)) | |
6537 | return FALSE; | |
6538 | } | |
6539 | } | |
6540 | ||
fff53dae L |
6541 | /* Adjust .eh_frame for .plt.got section. */ |
6542 | if (htab->plt_got_eh_frame != NULL | |
6543 | && htab->plt_got_eh_frame->contents != NULL) | |
6544 | { | |
6545 | if (htab->plt_got != NULL | |
6546 | && htab->plt_got->size != 0 | |
6547 | && (htab->plt_got->flags & SEC_EXCLUDE) == 0 | |
6548 | && htab->plt_got->output_section != NULL | |
6549 | && htab->plt_got_eh_frame->output_section != NULL) | |
6550 | { | |
6551 | bfd_vma plt_start = htab->plt_got->output_section->vma; | |
6552 | bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma | |
6553 | + htab->plt_got_eh_frame->output_offset | |
6554 | + PLT_FDE_START_OFFSET; | |
6555 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
6556 | htab->plt_got_eh_frame->contents | |
6557 | + PLT_FDE_START_OFFSET); | |
6558 | } | |
6559 | if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
6560 | { | |
6561 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
6562 | htab->plt_got_eh_frame, | |
6563 | htab->plt_got_eh_frame->contents)) | |
6564 | return FALSE; | |
6565 | } | |
6566 | } | |
6567 | ||
f2c29a16 L |
6568 | /* Adjust .eh_frame for the second PLT section. */ |
6569 | if (htab->plt_second_eh_frame != NULL | |
6570 | && htab->plt_second_eh_frame->contents != NULL) | |
8361ed4d | 6571 | { |
f2c29a16 L |
6572 | if (htab->plt_second != NULL |
6573 | && htab->plt_second->size != 0 | |
6574 | && (htab->plt_second->flags & SEC_EXCLUDE) == 0 | |
6575 | && htab->plt_second->output_section != NULL | |
6576 | && htab->plt_second_eh_frame->output_section != NULL) | |
8361ed4d | 6577 | { |
f2c29a16 L |
6578 | bfd_vma plt_start = htab->plt_second->output_section->vma; |
6579 | bfd_vma eh_frame_start | |
6580 | = (htab->plt_second_eh_frame->output_section->vma | |
6581 | + htab->plt_second_eh_frame->output_offset | |
6582 | + PLT_FDE_START_OFFSET); | |
8361ed4d | 6583 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, |
f2c29a16 | 6584 | htab->plt_second_eh_frame->contents |
8361ed4d L |
6585 | + PLT_FDE_START_OFFSET); |
6586 | } | |
f2c29a16 L |
6587 | if (htab->plt_second_eh_frame->sec_info_type |
6588 | == SEC_INFO_TYPE_EH_FRAME) | |
8361ed4d L |
6589 | { |
6590 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
f2c29a16 L |
6591 | htab->plt_second_eh_frame, |
6592 | htab->plt_second_eh_frame->contents)) | |
8361ed4d L |
6593 | return FALSE; |
6594 | } | |
6595 | } | |
6596 | ||
6de2ae4a L |
6597 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
6598 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
6599 | = GOT_ENTRY_SIZE; |
6600 | ||
aec6b87e L |
6601 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
6602 | if (bfd_link_pie (info)) | |
6603 | bfd_hash_traverse (&info->hash->table, | |
6604 | elf_x86_64_pie_finish_undefweak_symbol, | |
6605 | info); | |
6606 | ||
b34976b6 | 6607 | return TRUE; |
8d88c4ca NC |
6608 | } |
6609 | ||
233cc9c1 L |
6610 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
6611 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
6612 | It has to be done before elf_link_sort_relocs is called so that | |
6613 | dynamic relocations are properly sorted. */ | |
6614 | ||
6615 | static bfd_boolean | |
6616 | elf_x86_64_output_arch_local_syms | |
6617 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
6618 | struct bfd_link_info *info, | |
6619 | void *flaginfo ATTRIBUTE_UNUSED, | |
6620 | int (*func) (void *, const char *, | |
6621 | Elf_Internal_Sym *, | |
6622 | asection *, | |
6623 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
6624 | { | |
6625 | struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info); | |
6626 | if (htab == NULL) | |
6627 | return FALSE; | |
6628 | ||
6629 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
6630 | htab_traverse (htab->loc_hash_table, | |
6631 | elf_x86_64_finish_local_dynamic_symbol, | |
6632 | info); | |
6633 | ||
6634 | return TRUE; | |
6635 | } | |
6636 | ||
38b12349 | 6637 | /* Sort relocs into address order. */ |
4c45e5c9 | 6638 | |
38b12349 L |
6639 | static int |
6640 | compare_relocs (const void *ap, const void *bp) | |
4c45e5c9 | 6641 | { |
38b12349 L |
6642 | const arelent *a = * (const arelent **) ap; |
6643 | const arelent *b = * (const arelent **) bp; | |
144bed8d | 6644 | |
38b12349 L |
6645 | if (a->address > b->address) |
6646 | return 1; | |
6647 | else if (a->address < b->address) | |
6648 | return -1; | |
3972882e | 6649 | else |
38b12349 L |
6650 | return 0; |
6651 | } | |
cca5b8b6 | 6652 | |
38b12349 L |
6653 | enum elf_x86_64_plt_type |
6654 | { | |
6655 | plt_non_lazy = 0, | |
6656 | plt_lazy = 1 << 0, | |
f2c29a16 | 6657 | plt_second = 1 << 1, |
38b12349 L |
6658 | plt_unknown = -1 |
6659 | }; | |
6660 | ||
6661 | struct elf_x86_64_plt | |
6662 | { | |
6663 | const char *name; | |
6664 | asection *sec; | |
6665 | bfd_byte *contents; | |
6666 | enum elf_x86_64_plt_type type; | |
6667 | unsigned int plt_got_offset; | |
6668 | unsigned int plt_got_insn_size; | |
6669 | unsigned int plt_entry_size; | |
6670 | long count; | |
6671 | }; | |
6672 | ||
6673 | /* Forward declaration. */ | |
6674 | static const struct elf_x86_64_lazy_plt_layout elf_x86_64_nacl_plt; | |
6675 | ||
6676 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all | |
6677 | dynamic relocations. */ | |
6678 | ||
6679 | static long | |
6680 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
6681 | long symcount ATTRIBUTE_UNUSED, | |
6682 | asymbol **syms ATTRIBUTE_UNUSED, | |
6683 | long dynsymcount, | |
6684 | asymbol **dynsyms, | |
6685 | asymbol **ret) | |
6686 | { | |
98c5dfc9 | 6687 | long size, count, i, n, len; |
38b12349 L |
6688 | int j; |
6689 | unsigned int plt_got_offset, plt_entry_size, plt_got_insn_size; | |
6690 | asymbol *s; | |
6691 | bfd_byte *plt_contents; | |
6692 | long dynrelcount, relsize; | |
98c5dfc9 | 6693 | arelent **dynrelbuf, *p; |
38b12349 L |
6694 | const struct elf_x86_64_lazy_plt_layout *lazy_plt; |
6695 | const struct elf_x86_64_non_lazy_plt_layout *non_lazy_plt; | |
6696 | const struct elf_x86_64_lazy_plt_layout *lazy_bnd_plt; | |
6697 | const struct elf_x86_64_non_lazy_plt_layout *non_lazy_bnd_plt; | |
ee2fdd6f L |
6698 | const struct elf_x86_64_lazy_plt_layout *lazy_ibt_plt; |
6699 | const struct elf_x86_64_non_lazy_plt_layout *non_lazy_ibt_plt; | |
38b12349 L |
6700 | asection *plt; |
6701 | char *names; | |
6702 | enum elf_x86_64_plt_type plt_type; | |
6703 | struct elf_x86_64_plt plts[] = | |
144bed8d | 6704 | { |
38b12349 L |
6705 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
6706 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
f2c29a16 L |
6707 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, |
6708 | { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
dd9e66ee | 6709 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } |
38b12349 | 6710 | }; |
144bed8d | 6711 | |
38b12349 | 6712 | *ret = NULL; |
144bed8d | 6713 | |
38b12349 L |
6714 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
6715 | return 0; | |
144bed8d | 6716 | |
38b12349 L |
6717 | if (dynsymcount <= 0) |
6718 | return 0; | |
cca5b8b6 | 6719 | |
38b12349 L |
6720 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
6721 | if (relsize <= 0) | |
6722 | return -1; | |
6723 | ||
6724 | dynrelbuf = (arelent **) bfd_malloc (relsize); | |
6725 | if (dynrelbuf == NULL) | |
6726 | return -1; | |
6727 | ||
6728 | dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf, | |
6729 | dynsyms); | |
cca5b8b6 | 6730 | |
38b12349 L |
6731 | /* Sort the relocs by address. */ |
6732 | qsort (dynrelbuf, dynrelcount, sizeof (arelent *), compare_relocs); | |
6733 | ||
6734 | if (get_elf_x86_64_backend_data (abfd)->os == is_normal) | |
144bed8d | 6735 | { |
38b12349 L |
6736 | lazy_plt = &elf_x86_64_lazy_plt; |
6737 | non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
6738 | lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt; | |
6739 | non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt; | |
ee2fdd6f L |
6740 | if (ABI_64_P (abfd)) |
6741 | { | |
6742 | lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; | |
6743 | non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
6744 | } | |
6745 | else | |
6746 | { | |
6747 | lazy_ibt_plt = &elf_x32_lazy_ibt_plt; | |
6748 | non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
6749 | } | |
38b12349 L |
6750 | } |
6751 | else | |
6752 | { | |
6753 | lazy_plt = &elf_x86_64_nacl_plt; | |
6754 | non_lazy_plt = NULL; | |
6755 | lazy_bnd_plt = NULL; | |
6756 | non_lazy_bnd_plt = NULL; | |
ee2fdd6f L |
6757 | lazy_ibt_plt = NULL; |
6758 | non_lazy_ibt_plt = NULL; | |
38b12349 | 6759 | } |
144bed8d | 6760 | |
38b12349 L |
6761 | count = 0; |
6762 | for (j = 0; plts[j].name != NULL; j++) | |
6763 | { | |
6764 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
6765 | if (plt == NULL) | |
6f25f223 | 6766 | continue; |
533d0af0 | 6767 | |
38b12349 L |
6768 | /* Get the PLT section contents. */ |
6769 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
6770 | if (plt_contents == NULL) | |
6771 | break; | |
6772 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
6773 | plt_contents, 0, plt->size)) | |
6774 | { | |
6775 | free (plt_contents); | |
6776 | break; | |
6777 | } | |
144bed8d | 6778 | |
38b12349 L |
6779 | /* Check what kind of PLT it is. */ |
6780 | plt_type = plt_unknown; | |
6781 | if (plts[j].type == plt_unknown) | |
144bed8d | 6782 | { |
38b12349 L |
6783 | /* Match lazy PLT first. Need to check the first two |
6784 | instructions. */ | |
6785 | if ((memcmp (plt_contents, lazy_plt->plt0_entry, | |
6786 | lazy_plt->plt0_got1_offset) == 0) | |
6787 | && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6, | |
6788 | 2) == 0)) | |
6789 | plt_type = plt_lazy; | |
6790 | else if (lazy_bnd_plt != NULL | |
6791 | && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry, | |
6792 | lazy_bnd_plt->plt0_got1_offset) == 0) | |
6793 | && (memcmp (plt_contents + 6, | |
6794 | lazy_bnd_plt->plt0_entry + 6, 3) == 0)) | |
ec1f73bb | 6795 | { |
f2c29a16 | 6796 | plt_type = plt_lazy | plt_second; |
ee2fdd6f L |
6797 | /* The fist entry in the lazy IBT PLT is the same as the |
6798 | lazy BND PLT. */ | |
6799 | if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size, | |
6800 | lazy_ibt_plt->plt_entry, | |
6801 | lazy_ibt_plt->plt_got_offset) == 0)) | |
6802 | lazy_plt = lazy_ibt_plt; | |
6803 | else | |
6804 | lazy_plt = lazy_bnd_plt; | |
ec1f73bb | 6805 | } |
144bed8d | 6806 | } |
fca6ae69 | 6807 | |
38b12349 L |
6808 | if (non_lazy_plt != NULL |
6809 | && (plt_type == plt_unknown || plt_type == plt_non_lazy)) | |
6810 | { | |
6811 | /* Match non-lazy PLT. */ | |
6812 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
6813 | non_lazy_plt->plt_got_offset) == 0) | |
6814 | plt_type = plt_non_lazy; | |
6815 | } | |
6816 | ||
ee2fdd6f | 6817 | if (plt_type == plt_unknown || plt_type == plt_second) |
38b12349 | 6818 | { |
ee2fdd6f L |
6819 | if (non_lazy_bnd_plt != NULL |
6820 | && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry, | |
6821 | non_lazy_bnd_plt->plt_got_offset) == 0)) | |
38b12349 | 6822 | { |
ee2fdd6f | 6823 | /* Match BND PLT. */ |
f2c29a16 | 6824 | plt_type = plt_second; |
38b12349 L |
6825 | non_lazy_plt = non_lazy_bnd_plt; |
6826 | } | |
ee2fdd6f L |
6827 | else if (non_lazy_ibt_plt != NULL |
6828 | && (memcmp (plt_contents, | |
6829 | non_lazy_ibt_plt->plt_entry, | |
6830 | non_lazy_ibt_plt->plt_got_offset) == 0)) | |
6831 | { | |
6832 | /* Match IBT PLT. */ | |
6833 | plt_type = plt_second; | |
6834 | non_lazy_plt = non_lazy_ibt_plt; | |
6835 | } | |
38b12349 L |
6836 | } |
6837 | ||
6838 | if (plt_type == plt_unknown) | |
6839 | continue; | |
6840 | ||
6841 | plts[j].sec = plt; | |
6842 | plts[j].type = plt_type; | |
6843 | ||
6844 | if ((plt_type & plt_lazy)) | |
6845 | { | |
6846 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
6847 | plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size; | |
6848 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
6849 | /* Skip PLT0 in lazy PLT. */ | |
6850 | i = 1; | |
6851 | } | |
6852 | else | |
6853 | { | |
6854 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
6855 | plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size; | |
6856 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
6857 | i = 0; | |
6858 | } | |
6859 | ||
f2c29a16 L |
6860 | /* Skip lazy PLT when the second PLT is used. */ |
6861 | if (plt_type == (plt_lazy | plt_second)) | |
38b12349 L |
6862 | plts[j].count = 0; |
6863 | else | |
6864 | { | |
6865 | n = plt->size / plts[j].plt_entry_size; | |
6866 | plts[j].count = n; | |
6867 | count += n - i; | |
6868 | } | |
6869 | ||
6870 | plts[j].contents = plt_contents; | |
144bed8d L |
6871 | } |
6872 | ||
38b12349 | 6873 | size = count * sizeof (asymbol); |
98c5dfc9 L |
6874 | |
6875 | /* Allocate space for @plt suffixes. */ | |
6876 | n = 0; | |
6877 | for (i = 0; i < dynrelcount; i++) | |
6878 | { | |
6879 | p = dynrelbuf[i]; | |
6880 | size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); | |
6881 | if (p->addend != 0) | |
6882 | size += sizeof ("+0x") - 1 + 8 + 8 * ABI_64_P (abfd); | |
6883 | } | |
6884 | ||
38b12349 L |
6885 | s = *ret = (asymbol *) bfd_zmalloc (size); |
6886 | if (s == NULL) | |
6887 | { | |
6888 | bad_return: | |
6889 | for (j = 0; plts[j].name != NULL; j++) | |
6890 | if (plts[j].contents != NULL) | |
6891 | free (plts[j].contents); | |
6892 | free (dynrelbuf); | |
6893 | return -1; | |
6894 | } | |
3972882e | 6895 | |
38b12349 | 6896 | /* Check for each PLT section. */ |
98c5dfc9 | 6897 | names = (char *) (s + count); |
38b12349 L |
6898 | size = 0; |
6899 | n = 0; | |
6900 | for (j = 0; plts[j].name != NULL; j++) | |
6901 | if ((plt_contents = plts[j].contents) != NULL) | |
6902 | { | |
6903 | long k; | |
6904 | bfd_vma offset; | |
8df9fc9d | 6905 | |
38b12349 L |
6906 | plt_got_offset = plts[j].plt_got_offset; |
6907 | plt_got_insn_size = plts[j].plt_got_insn_size; | |
6908 | plt_entry_size = plts[j].plt_entry_size; | |
0ff2b86e | 6909 | |
38b12349 L |
6910 | plt = plts[j].sec; |
6911 | ||
6912 | if ((plts[j].type & plt_lazy)) | |
6913 | { | |
6914 | /* Skip PLT0 in lazy PLT. */ | |
6915 | k = 1; | |
6916 | offset = plt_entry_size; | |
6917 | } | |
6918 | else | |
6919 | { | |
6920 | k = 0; | |
6921 | offset = 0; | |
6922 | } | |
6923 | ||
6924 | /* Check each PLT entry against dynamic relocations. */ | |
6925 | for (; k < plts[j].count; k++) | |
6926 | { | |
6927 | int off; | |
6928 | bfd_vma got_vma; | |
6929 | long min, max, mid; | |
38b12349 L |
6930 | |
6931 | /* Get the PC-relative offset, a signed 32-bit integer. */ | |
6932 | off = H_GET_32 (abfd, (plt_contents + offset | |
6933 | + plt_got_offset)); | |
6934 | got_vma = plt->vma + offset + off + plt_got_insn_size; | |
6935 | ||
6936 | /* Binary search. */ | |
6937 | p = dynrelbuf[0]; | |
6938 | min = 0; | |
6939 | max = dynrelcount; | |
6940 | while ((min + 1) < max) | |
6941 | { | |
6942 | arelent *r; | |
6943 | ||
6944 | mid = (min + max) / 2; | |
6945 | r = dynrelbuf[mid]; | |
6946 | if (got_vma > r->address) | |
6947 | min = mid; | |
6948 | else if (got_vma < r->address) | |
6949 | max = mid; | |
6950 | else | |
6951 | { | |
6952 | p = r; | |
6953 | break; | |
6954 | } | |
6955 | } | |
6956 | ||
6957 | /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */ | |
6958 | if (got_vma == p->address | |
6959 | && p->howto != NULL | |
6960 | && (p->howto->type == R_X86_64_JUMP_SLOT | |
6961 | || p->howto->type == R_X86_64_GLOB_DAT | |
6962 | || p->howto->type == R_X86_64_IRELATIVE)) | |
6963 | { | |
6964 | *s = **p->sym_ptr_ptr; | |
6965 | /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL | |
6966 | set. Since we are defining a symbol, ensure one | |
6967 | of them is set. */ | |
6968 | if ((s->flags & BSF_LOCAL) == 0) | |
6969 | s->flags |= BSF_GLOBAL; | |
6970 | s->flags |= BSF_SYNTHETIC; | |
6971 | /* This is no longer a section symbol. */ | |
6972 | s->flags &= ~BSF_SECTION_SYM; | |
6973 | s->section = plt; | |
6974 | s->the_bfd = plt->owner; | |
6975 | s->value = offset; | |
98c5dfc9 L |
6976 | s->udata.p = NULL; |
6977 | s->name = names; | |
6978 | len = strlen ((*p->sym_ptr_ptr)->name); | |
6979 | memcpy (names, (*p->sym_ptr_ptr)->name, len); | |
6980 | names += len; | |
38b12349 | 6981 | if (p->addend != 0) |
98c5dfc9 L |
6982 | { |
6983 | char buf[30], *a; | |
6984 | ||
6985 | memcpy (names, "+0x", sizeof ("+0x") - 1); | |
6986 | names += sizeof ("+0x") - 1; | |
6987 | bfd_sprintf_vma (abfd, buf, p->addend); | |
6988 | for (a = buf; *a == '0'; ++a) | |
6989 | ; | |
6990 | size = strlen (a); | |
6991 | memcpy (names, a, size); | |
6992 | names += size; | |
6993 | } | |
6994 | memcpy (names, "@plt", sizeof ("@plt")); | |
6995 | names += sizeof ("@plt"); | |
38b12349 L |
6996 | n++; |
6997 | s++; | |
6998 | } | |
6999 | offset += plt_entry_size; | |
7000 | } | |
7001 | } | |
7002 | ||
7003 | /* PLT entries with R_X86_64_TLSDESC relocations are skipped. */ | |
7004 | if (n == 0) | |
7005 | goto bad_return; | |
7006 | ||
7007 | count = n; | |
7008 | ||
38b12349 L |
7009 | for (j = 0; plts[j].name != NULL; j++) |
7010 | if (plts[j].contents != NULL) | |
7011 | free (plts[j].contents); | |
7012 | ||
7013 | free (dynrelbuf); | |
7014 | ||
7015 | return count; | |
0ff2b86e L |
7016 | } |
7017 | ||
d2b2c203 DJ |
7018 | /* Handle an x86-64 specific section when reading an object file. This |
7019 | is called when elfcode.h finds a section with an unknown type. */ | |
7020 | ||
7021 | static bfd_boolean | |
0c723101 L |
7022 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
7023 | const char *name, int shindex) | |
d2b2c203 DJ |
7024 | { |
7025 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
7026 | return FALSE; | |
7027 | ||
6dc132d9 | 7028 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
7029 | return FALSE; |
7030 | ||
7031 | return TRUE; | |
7032 | } | |
7033 | ||
3b22753a L |
7034 | /* Hook called by the linker routine which adds symbols from an object |
7035 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
7036 | of .bss. */ | |
7037 | ||
7038 | static bfd_boolean | |
351f65ca | 7039 | elf_x86_64_add_symbol_hook (bfd *abfd, |
a43942db | 7040 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
351f65ca L |
7041 | Elf_Internal_Sym *sym, |
7042 | const char **namep ATTRIBUTE_UNUSED, | |
7043 | flagword *flagsp ATTRIBUTE_UNUSED, | |
7044 | asection **secp, | |
7045 | bfd_vma *valp) | |
3b22753a L |
7046 | { |
7047 | asection *lcomm; | |
7048 | ||
7049 | switch (sym->st_shndx) | |
7050 | { | |
7051 | case SHN_X86_64_LCOMMON: | |
7052 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
7053 | if (lcomm == NULL) | |
7054 | { | |
7055 | lcomm = bfd_make_section_with_flags (abfd, | |
7056 | "LARGE_COMMON", | |
7057 | (SEC_ALLOC | |
7058 | | SEC_IS_COMMON | |
7059 | | SEC_LINKER_CREATED)); | |
7060 | if (lcomm == NULL) | |
7061 | return FALSE; | |
7062 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
7063 | } | |
7064 | *secp = lcomm; | |
7065 | *valp = sym->st_size; | |
c35bdf6e | 7066 | return TRUE; |
3b22753a | 7067 | } |
d8045f23 | 7068 | |
3b22753a L |
7069 | return TRUE; |
7070 | } | |
7071 | ||
7072 | ||
7073 | /* Given a BFD section, try to locate the corresponding ELF section | |
7074 | index. */ | |
7075 | ||
7076 | static bfd_boolean | |
351f65ca L |
7077 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
7078 | asection *sec, int *index_return) | |
3b22753a L |
7079 | { |
7080 | if (sec == &_bfd_elf_large_com_section) | |
7081 | { | |
91d6fa6a | 7082 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
7083 | return TRUE; |
7084 | } | |
7085 | return FALSE; | |
7086 | } | |
7087 | ||
7088 | /* Process a symbol. */ | |
7089 | ||
7090 | static void | |
351f65ca L |
7091 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
7092 | asymbol *asym) | |
3b22753a L |
7093 | { |
7094 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
7095 | ||
7096 | switch (elfsym->internal_elf_sym.st_shndx) | |
7097 | { | |
7098 | case SHN_X86_64_LCOMMON: | |
7099 | asym->section = &_bfd_elf_large_com_section; | |
7100 | asym->value = elfsym->internal_elf_sym.st_size; | |
7101 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
7102 | asym->flags &= ~BSF_GLOBAL; | |
7103 | break; | |
7104 | } | |
7105 | } | |
7106 | ||
7107 | static bfd_boolean | |
351f65ca | 7108 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
7109 | { |
7110 | return (sym->st_shndx == SHN_COMMON | |
7111 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
7112 | } | |
7113 | ||
7114 | static unsigned int | |
351f65ca | 7115 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
7116 | { |
7117 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
7118 | return SHN_COMMON; | |
7119 | else | |
7120 | return SHN_X86_64_LCOMMON; | |
7121 | } | |
7122 | ||
7123 | static asection * | |
351f65ca | 7124 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
7125 | { |
7126 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
7127 | return bfd_com_section_ptr; | |
7128 | else | |
7129 | return &_bfd_elf_large_com_section; | |
7130 | } | |
7131 | ||
7132 | static bfd_boolean | |
5d13b3b3 AM |
7133 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
7134 | const Elf_Internal_Sym *sym, | |
351f65ca | 7135 | asection **psec, |
5d13b3b3 AM |
7136 | bfd_boolean newdef, |
7137 | bfd_boolean olddef, | |
351f65ca | 7138 | bfd *oldbfd, |
5d13b3b3 | 7139 | const asection *oldsec) |
3b22753a L |
7140 | { |
7141 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
7142 | normal common symbol. We turn the large common symbol into a |
7143 | normal one. */ | |
5d13b3b3 | 7144 | if (!olddef |
3b22753a | 7145 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
7146 | && !newdef |
7147 | && bfd_is_com_section (*psec) | |
7148 | && oldsec != *psec) | |
3b22753a | 7149 | { |
00492999 | 7150 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 7151 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
7152 | { |
7153 | h->root.u.c.p->section | |
7154 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
7155 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
7156 | } | |
7157 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
7158 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
7159 | *psec = bfd_com_section_ptr; | |
3b22753a L |
7160 | } |
7161 | ||
7162 | return TRUE; | |
7163 | } | |
7164 | ||
a5b4ee94 L |
7165 | static void |
7166 | elf_x86_64_merge_symbol_attribute (struct elf_link_hash_entry *h, | |
7167 | const Elf_Internal_Sym *isym, | |
7168 | bfd_boolean definition, | |
7169 | bfd_boolean dynamic ATTRIBUTE_UNUSED) | |
7170 | { | |
7171 | if (definition) | |
7172 | { | |
7173 | struct elf_x86_64_link_hash_entry *eh | |
7174 | = (struct elf_x86_64_link_hash_entry *) h; | |
7175 | eh->def_protected = (ELF_ST_VISIBILITY (isym->st_other) | |
7176 | == STV_PROTECTED); | |
7177 | } | |
7178 | } | |
7179 | ||
3b22753a | 7180 | static int |
351f65ca L |
7181 | elf_x86_64_additional_program_headers (bfd *abfd, |
7182 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
7183 | { |
7184 | asection *s; | |
9a2e389a | 7185 | int count = 0; |
3b22753a L |
7186 | |
7187 | /* Check to see if we need a large readonly segment. */ | |
7188 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
7189 | if (s && (s->flags & SEC_LOAD)) | |
7190 | count++; | |
7191 | ||
7192 | /* Check to see if we need a large data segment. Since .lbss sections | |
7193 | is placed right after the .bss section, there should be no need for | |
7194 | a large data segment just because of .lbss. */ | |
7195 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
7196 | if (s && (s->flags & SEC_LOAD)) | |
7197 | count++; | |
7198 | ||
7199 | return count; | |
7200 | } | |
7201 | ||
fdc90cb4 JJ |
7202 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
7203 | ||
7204 | static bfd_boolean | |
351f65ca | 7205 | elf_x86_64_hash_symbol (struct elf_link_hash_entry *h) |
fdc90cb4 JJ |
7206 | { |
7207 | if (h->plt.offset != (bfd_vma) -1 | |
7208 | && !h->def_regular | |
7209 | && !h->pointer_equality_needed) | |
7210 | return FALSE; | |
7211 | ||
7212 | return _bfd_elf_hash_symbol (h); | |
7213 | } | |
7214 | ||
c543bf9a L |
7215 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
7216 | ||
7217 | static bfd_boolean | |
7218 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
7219 | const bfd_target *output) | |
7220 | { | |
7221 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
7222 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
7223 | && _bfd_elf_relocs_compatible (input, output)); | |
7224 | } | |
7225 | ||
46bed679 L |
7226 | /* Parse x86-64 GNU properties. */ |
7227 | ||
7228 | static enum elf_property_kind | |
7229 | elf_x86_64_parse_gnu_properties (bfd *abfd, unsigned int type, | |
7230 | bfd_byte *ptr, unsigned int datasz) | |
7231 | { | |
7232 | elf_property *prop; | |
7233 | ||
7234 | switch (type) | |
7235 | { | |
7236 | case GNU_PROPERTY_X86_ISA_1_USED: | |
7237 | case GNU_PROPERTY_X86_ISA_1_NEEDED: | |
ee2fdd6f | 7238 | case GNU_PROPERTY_X86_FEATURE_1_AND: |
46bed679 L |
7239 | if (datasz != 4) |
7240 | { | |
7241 | _bfd_error_handler | |
7242 | ((type == GNU_PROPERTY_X86_ISA_1_USED | |
e4097f5e | 7243 | ? _("error: %B: <corrupt x86 ISA used size: 0x%x>") |
ee2fdd6f L |
7244 | : (type == GNU_PROPERTY_X86_ISA_1_NEEDED |
7245 | ? _("error: %B: <corrupt x86 ISA needed size: 0x%x>") | |
7246 | : _("error: %B: <corrupt x86 feature size: 0x%x>"))), | |
46bed679 L |
7247 | abfd, datasz); |
7248 | return property_corrupt; | |
7249 | } | |
7250 | prop = _bfd_elf_get_property (abfd, type, datasz); | |
73caa85d L |
7251 | /* Combine properties of the same type. */ |
7252 | prop->u.number |= bfd_h_get_32 (abfd, ptr); | |
46bed679 L |
7253 | prop->pr_kind = property_number; |
7254 | break; | |
7255 | ||
7256 | default: | |
7257 | return property_ignored; | |
7258 | } | |
7259 | ||
7260 | return property_number; | |
7261 | } | |
7262 | ||
7263 | /* Merge x86-64 GNU property BPROP with APROP. If APROP isn't NULL, | |
7264 | return TRUE if APROP is updated. Otherwise, return TRUE if BPROP | |
7265 | should be merged with ABFD. */ | |
7266 | ||
7267 | static bfd_boolean | |
ee2fdd6f | 7268 | elf_x86_64_merge_gnu_properties (struct bfd_link_info *info, |
5c3ce2bc | 7269 | bfd *abfd ATTRIBUTE_UNUSED, |
46bed679 L |
7270 | elf_property *aprop, |
7271 | elf_property *bprop) | |
7272 | { | |
ee2fdd6f | 7273 | unsigned int number, features; |
46bed679 L |
7274 | bfd_boolean updated = FALSE; |
7275 | unsigned int pr_type = aprop != NULL ? aprop->pr_type : bprop->pr_type; | |
7276 | ||
7277 | switch (pr_type) | |
7278 | { | |
7279 | case GNU_PROPERTY_X86_ISA_1_USED: | |
7280 | case GNU_PROPERTY_X86_ISA_1_NEEDED: | |
7281 | if (aprop != NULL && bprop != NULL) | |
7282 | { | |
7283 | number = aprop->u.number; | |
7284 | aprop->u.number = number | bprop->u.number; | |
7285 | updated = number != (unsigned int) aprop->u.number; | |
7286 | } | |
7287 | else | |
7288 | { | |
7289 | /* Return TRUE if APROP is NULL to indicate that BPROP should | |
7290 | be added to ABFD. */ | |
7291 | updated = aprop == NULL; | |
7292 | } | |
7293 | break; | |
7294 | ||
ee2fdd6f L |
7295 | case GNU_PROPERTY_X86_FEATURE_1_AND: |
7296 | /* Only one of APROP and BPROP can be NULL: | |
7297 | 1. APROP & BPROP when both APROP and BPROP aren't NULL. | |
7298 | 2. If APROP is NULL, remove x86 feature. | |
7299 | 3. Otherwise, do nothing. | |
7300 | */ | |
7301 | if (aprop != NULL && bprop != NULL) | |
7302 | { | |
7303 | features = 0; | |
7304 | if (info->ibt) | |
7305 | features = GNU_PROPERTY_X86_FEATURE_1_IBT; | |
48580982 L |
7306 | if (info->shstk) |
7307 | features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK; | |
ee2fdd6f | 7308 | number = aprop->u.number; |
48580982 L |
7309 | /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and |
7310 | GNU_PROPERTY_X86_FEATURE_1_SHSTK. */ | |
ee2fdd6f L |
7311 | aprop->u.number = (number & bprop->u.number) | features; |
7312 | updated = number != (unsigned int) aprop->u.number; | |
7313 | /* Remove the property if all feature bits are cleared. */ | |
7314 | if (aprop->u.number == 0) | |
7315 | aprop->pr_kind = property_remove; | |
7316 | } | |
7317 | else | |
7318 | { | |
7319 | features = 0; | |
7320 | if (info->ibt) | |
7321 | features = GNU_PROPERTY_X86_FEATURE_1_IBT; | |
48580982 L |
7322 | if (info->shstk) |
7323 | features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK; | |
ee2fdd6f L |
7324 | if (features) |
7325 | { | |
48580982 L |
7326 | /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and |
7327 | GNU_PROPERTY_X86_FEATURE_1_SHSTK. */ | |
ee2fdd6f L |
7328 | if (aprop != NULL) |
7329 | { | |
7330 | number = aprop->u.number; | |
7331 | aprop->u.number = number | features; | |
7332 | updated = number != (unsigned int) aprop->u.number; | |
7333 | } | |
7334 | else | |
7335 | { | |
7336 | bprop->u.number |= features; | |
7337 | updated = TRUE; | |
7338 | } | |
7339 | } | |
7340 | else if (aprop != NULL) | |
7341 | { | |
7342 | aprop->pr_kind = property_remove; | |
7343 | updated = TRUE; | |
7344 | } | |
7345 | } | |
7346 | break; | |
7347 | ||
46bed679 L |
7348 | default: |
7349 | /* Never should happen. */ | |
7350 | abort (); | |
7351 | } | |
7352 | ||
7353 | return updated; | |
7354 | } | |
7355 | ||
38b12349 L |
7356 | /* Set up x86-64 GNU properties. Return the first relocatable ELF input |
7357 | with GNU properties if found. Otherwise, return NULL. */ | |
7358 | ||
7359 | static bfd * | |
7360 | elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info) | |
7361 | { | |
7362 | bfd_boolean normal_target; | |
7363 | bfd_boolean lazy_plt; | |
7364 | asection *sec, *pltsec; | |
7365 | bfd *dynobj; | |
ee2fdd6f L |
7366 | bfd_boolean use_ibt_plt; |
7367 | unsigned int plt_alignment, features; | |
38b12349 | 7368 | struct elf_x86_64_link_hash_table *htab; |
ee2fdd6f | 7369 | bfd *pbfd; |
73784fa5 L |
7370 | bfd *ebfd = NULL; |
7371 | elf_property *prop; | |
ee2fdd6f L |
7372 | |
7373 | features = 0; | |
7374 | if (info->ibt) | |
7375 | features = GNU_PROPERTY_X86_FEATURE_1_IBT; | |
48580982 L |
7376 | if (info->shstk) |
7377 | features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK; | |
ee2fdd6f | 7378 | |
73784fa5 L |
7379 | /* Find a normal input file with GNU property note. */ |
7380 | for (pbfd = info->input_bfds; | |
7381 | pbfd != NULL; | |
7382 | pbfd = pbfd->link.next) | |
7383 | if (bfd_get_flavour (pbfd) == bfd_target_elf_flavour | |
7384 | && bfd_count_sections (pbfd) != 0) | |
7385 | { | |
7386 | ebfd = pbfd; | |
7387 | ||
7388 | if (elf_properties (pbfd) != NULL) | |
7389 | break; | |
7390 | } | |
ee2fdd6f | 7391 | |
a5b4ee94 | 7392 | if (ebfd != NULL && features) |
73784fa5 | 7393 | { |
a5b4ee94 L |
7394 | /* If features is set, add GNU_PROPERTY_X86_FEATURE_1_IBT and |
7395 | GNU_PROPERTY_X86_FEATURE_1_SHSTK. */ | |
7396 | prop = _bfd_elf_get_property (ebfd, | |
7397 | GNU_PROPERTY_X86_FEATURE_1_AND, | |
7398 | 4); | |
7399 | prop->u.number |= features; | |
7400 | prop->pr_kind = property_number; | |
7401 | ||
7402 | /* Create the GNU property note section if needed. */ | |
7403 | if (pbfd == NULL) | |
ee2fdd6f | 7404 | { |
a5b4ee94 L |
7405 | sec = bfd_make_section_with_flags (ebfd, |
7406 | NOTE_GNU_PROPERTY_SECTION_NAME, | |
7407 | (SEC_ALLOC | |
7408 | | SEC_LOAD | |
7409 | | SEC_IN_MEMORY | |
7410 | | SEC_READONLY | |
7411 | | SEC_HAS_CONTENTS | |
7412 | | SEC_DATA)); | |
7413 | if (sec == NULL) | |
7414 | info->callbacks->einfo (_("%F: failed to create GNU property section\n")); | |
73784fa5 | 7415 | |
a5b4ee94 L |
7416 | if (!bfd_set_section_alignment (ebfd, sec, |
7417 | ABI_64_P (ebfd) ? 3 : 2)) | |
7418 | { | |
5d8763a3 | 7419 | error_alignment: |
a5b4ee94 L |
7420 | info->callbacks->einfo (_("%F%A: failed to align section\n"), |
7421 | sec); | |
73784fa5 | 7422 | } |
73784fa5 | 7423 | |
a5b4ee94 L |
7424 | elf_section_type (sec) = SHT_NOTE; |
7425 | } | |
ee2fdd6f L |
7426 | } |
7427 | ||
7428 | pbfd = _bfd_elf_link_setup_gnu_properties (info); | |
38b12349 L |
7429 | |
7430 | if (bfd_link_relocatable (info)) | |
7431 | return pbfd; | |
7432 | ||
7433 | htab = elf_x86_64_hash_table (info); | |
7434 | if (htab == NULL) | |
7435 | return pbfd; | |
7436 | ||
ee2fdd6f L |
7437 | use_ibt_plt = info->ibtplt || info->ibt; |
7438 | if (!use_ibt_plt && pbfd != NULL) | |
7439 | { | |
7440 | /* Check if GNU_PROPERTY_X86_FEATURE_1_IBT is on. */ | |
7441 | elf_property_list *p; | |
7442 | ||
7443 | /* The property list is sorted in order of type. */ | |
7444 | for (p = elf_properties (pbfd); p; p = p->next) | |
7445 | { | |
7446 | if (GNU_PROPERTY_X86_FEATURE_1_AND == p->property.pr_type) | |
7447 | { | |
7448 | use_ibt_plt = !!(p->property.u.number | |
7449 | & GNU_PROPERTY_X86_FEATURE_1_IBT); | |
7450 | break; | |
7451 | } | |
7452 | else if (GNU_PROPERTY_X86_FEATURE_1_AND < p->property.pr_type) | |
7453 | break; | |
7454 | } | |
7455 | } | |
7456 | ||
38b12349 L |
7457 | dynobj = htab->elf.dynobj; |
7458 | ||
7459 | /* Set htab->elf.dynobj here so that there is no need to check and | |
7460 | set it in check_relocs. */ | |
7461 | if (dynobj == NULL) | |
7462 | { | |
ee2fdd6f L |
7463 | if (pbfd != NULL) |
7464 | { | |
7465 | htab->elf.dynobj = pbfd; | |
7466 | dynobj = pbfd; | |
7467 | } | |
7468 | else | |
7469 | { | |
7470 | bfd *abfd; | |
7471 | ||
7472 | /* Find a normal input file to hold linker created | |
7473 | sections. */ | |
7474 | for (abfd = info->input_bfds; | |
7475 | abfd != NULL; | |
7476 | abfd = abfd->link.next) | |
b7a18930 NC |
7477 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour |
7478 | && (abfd->flags | |
7479 | & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0) | |
ee2fdd6f L |
7480 | { |
7481 | htab->elf.dynobj = abfd; | |
7482 | dynobj = abfd; | |
7483 | break; | |
7484 | } | |
7485 | } | |
38b12349 L |
7486 | } |
7487 | ||
7488 | /* Even when lazy binding is disabled by "-z now", the PLT0 entry may | |
7489 | still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for | |
7490 | canonical function address. */ | |
7491 | htab->plt.has_plt0 = 1; | |
7492 | ||
7493 | if (get_elf_x86_64_backend_data (info->output_bfd)->os | |
7494 | == is_normal) | |
7495 | { | |
ee2fdd6f L |
7496 | if (use_ibt_plt) |
7497 | { | |
7498 | if (ABI_64_P (dynobj)) | |
7499 | { | |
7500 | htab->lazy_plt = &elf_x86_64_lazy_ibt_plt; | |
7501 | htab->non_lazy_plt = &elf_x86_64_non_lazy_ibt_plt; | |
7502 | } | |
7503 | else | |
7504 | { | |
7505 | htab->lazy_plt = &elf_x32_lazy_ibt_plt; | |
7506 | htab->non_lazy_plt = &elf_x32_non_lazy_ibt_plt; | |
7507 | } | |
7508 | } | |
7509 | else if (info->bndplt) | |
38b12349 L |
7510 | { |
7511 | htab->lazy_plt = &elf_x86_64_lazy_bnd_plt; | |
7512 | htab->non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt; | |
7513 | } | |
7514 | else | |
7515 | { | |
7516 | htab->lazy_plt = &elf_x86_64_lazy_plt; | |
7517 | htab->non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
7518 | } | |
7519 | normal_target = TRUE; | |
7520 | } | |
7521 | else | |
7522 | { | |
7523 | htab->lazy_plt = &elf_x86_64_nacl_plt; | |
7524 | htab->non_lazy_plt = NULL; | |
7525 | normal_target = FALSE; | |
7526 | } | |
7527 | ||
7528 | pltsec = htab->elf.splt; | |
7529 | ||
7530 | /* If the non-lazy PLT is available, use it for all PLT entries if | |
7531 | there are no PLT0 or no .plt section. */ | |
7532 | if (htab->non_lazy_plt != NULL | |
7533 | && (!htab->plt.has_plt0 || pltsec == NULL)) | |
7534 | { | |
7535 | lazy_plt = FALSE; | |
7536 | htab->plt.plt_entry | |
7537 | = htab->non_lazy_plt->plt_entry; | |
7538 | htab->plt.plt_entry_size | |
7539 | = htab->non_lazy_plt->plt_entry_size; | |
7540 | htab->plt.plt_got_offset | |
7541 | = htab->non_lazy_plt->plt_got_offset; | |
7542 | htab->plt.plt_got_insn_size | |
7543 | = htab->non_lazy_plt->plt_got_insn_size; | |
7544 | htab->plt.eh_frame_plt_size | |
7545 | = htab->non_lazy_plt->eh_frame_plt_size; | |
7546 | htab->plt.eh_frame_plt | |
7547 | = htab->non_lazy_plt->eh_frame_plt; | |
7548 | } | |
7549 | else | |
7550 | { | |
7551 | lazy_plt = TRUE; | |
7552 | htab->plt.plt_entry | |
7553 | = htab->lazy_plt->plt_entry; | |
7554 | htab->plt.plt_entry_size | |
7555 | = htab->lazy_plt->plt_entry_size; | |
7556 | htab->plt.plt_got_offset | |
7557 | = htab->lazy_plt->plt_got_offset; | |
7558 | htab->plt.plt_got_insn_size | |
7559 | = htab->lazy_plt->plt_got_insn_size; | |
7560 | htab->plt.eh_frame_plt_size | |
7561 | = htab->lazy_plt->eh_frame_plt_size; | |
7562 | htab->plt.eh_frame_plt | |
7563 | = htab->lazy_plt->eh_frame_plt; | |
7564 | } | |
7565 | ||
7566 | /* Return if there are no normal input files. */ | |
7567 | if (dynobj == NULL) | |
7568 | return pbfd; | |
7569 | ||
7570 | /* Since create_dynamic_sections isn't always called, but GOT | |
7571 | relocations need GOT relocations, create them here so that we | |
7572 | don't need to do it in check_relocs. */ | |
7573 | if (htab->elf.sgot == NULL | |
7574 | && !_bfd_elf_create_got_section (dynobj, info)) | |
7575 | info->callbacks->einfo (_("%F: failed to create GOT sections\n")); | |
7576 | ||
7577 | /* Align .got and .got.plt sections to their entry size. Do it here | |
7578 | instead of in create_dynamic_sections so that they are always | |
7579 | properly aligned even if create_dynamic_sections isn't called. */ | |
7580 | sec = htab->elf.sgot; | |
7581 | if (!bfd_set_section_alignment (dynobj, sec, 3)) | |
5d8763a3 | 7582 | goto error_alignment; |
38b12349 L |
7583 | |
7584 | sec = htab->elf.sgotplt; | |
7585 | if (!bfd_set_section_alignment (dynobj, sec, 3)) | |
7586 | goto error_alignment; | |
7587 | ||
7588 | /* Create the ifunc sections here so that check_relocs can be | |
7589 | simplified. */ | |
7590 | if (!_bfd_elf_create_ifunc_sections (dynobj, info)) | |
7591 | info->callbacks->einfo (_("%F: failed to create ifunc sections\n")); | |
7592 | ||
7593 | plt_alignment = bfd_log2 (htab->plt.plt_entry_size); | |
7594 | ||
7595 | if (pltsec != NULL) | |
7596 | { | |
7597 | /* Whe creating executable, set the contents of the .interp | |
7598 | section to the interpreter. */ | |
7599 | if (bfd_link_executable (info) && !info->nointerp) | |
7600 | { | |
7601 | asection *s = bfd_get_linker_section (dynobj, ".interp"); | |
7602 | if (s == NULL) | |
7603 | abort (); | |
7604 | s->size = htab->dynamic_interpreter_size; | |
7605 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
7606 | htab->interp = s; | |
7607 | } | |
7608 | ||
7609 | /* Don't change PLT section alignment for NaCl since it uses | |
7610 | 64-byte PLT entry and sets PLT section alignment to 32 | |
7611 | bytes. Don't create additional PLT sections for NaCl. */ | |
7612 | if (normal_target) | |
7613 | { | |
7614 | const struct elf_backend_data *bed | |
7615 | = get_elf_backend_data (dynobj); | |
7616 | flagword pltflags = (bed->dynamic_sec_flags | |
7617 | | SEC_ALLOC | |
7618 | | SEC_CODE | |
7619 | | SEC_LOAD | |
7620 | | SEC_READONLY); | |
7621 | unsigned int non_lazy_plt_alignment | |
7622 | = bfd_log2 (htab->non_lazy_plt->plt_entry_size); | |
7623 | ||
7624 | sec = pltsec; | |
7625 | if (!bfd_set_section_alignment (sec->owner, sec, | |
7626 | plt_alignment)) | |
7627 | goto error_alignment; | |
7628 | ||
7629 | /* Create the GOT procedure linkage table. */ | |
7630 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
7631 | ".plt.got", | |
7632 | pltflags); | |
7633 | if (sec == NULL) | |
7634 | info->callbacks->einfo (_("%F: failed to create GOT PLT section\n")); | |
7635 | ||
7636 | if (!bfd_set_section_alignment (dynobj, sec, | |
7637 | non_lazy_plt_alignment)) | |
7638 | goto error_alignment; | |
7639 | ||
7640 | htab->plt_got = sec; | |
7641 | ||
ee2fdd6f | 7642 | if (lazy_plt) |
38b12349 | 7643 | { |
ee2fdd6f L |
7644 | sec = NULL; |
7645 | ||
7646 | if (use_ibt_plt) | |
7647 | { | |
7648 | /* Create the second PLT for Intel IBT support. IBT | |
7649 | PLT is supported only for non-NaCl target and is | |
7650 | is needed only for lazy binding. */ | |
7651 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
7652 | ".plt.sec", | |
7653 | pltflags); | |
7654 | if (sec == NULL) | |
7655 | info->callbacks->einfo (_("%F: failed to create IBT-enabled PLT section\n")); | |
7656 | ||
7657 | if (!bfd_set_section_alignment (dynobj, sec, | |
7658 | plt_alignment)) | |
7659 | goto error_alignment; | |
7660 | } | |
7661 | else if (info->bndplt && ABI_64_P (dynobj)) | |
7662 | { | |
7663 | /* Create the second PLT for Intel MPX support. MPX | |
7664 | PLT is supported only for non-NaCl target in 64-bit | |
7665 | mode and is needed only for lazy binding. */ | |
7666 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
7667 | ".plt.sec", | |
7668 | pltflags); | |
7669 | if (sec == NULL) | |
7670 | info->callbacks->einfo (_("%F: failed to create BND PLT section\n")); | |
7671 | ||
7672 | if (!bfd_set_section_alignment (dynobj, sec, | |
7673 | non_lazy_plt_alignment)) | |
7674 | goto error_alignment; | |
7675 | } | |
38b12349 | 7676 | |
f2c29a16 | 7677 | htab->plt_second = sec; |
38b12349 L |
7678 | } |
7679 | } | |
7680 | ||
7681 | if (!info->no_ld_generated_unwind_info) | |
7682 | { | |
7683 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | |
7684 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
7685 | | SEC_LINKER_CREATED); | |
7686 | ||
7687 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
7688 | ".eh_frame", | |
7689 | flags); | |
7690 | if (sec == NULL) | |
7691 | info->callbacks->einfo (_("%F: failed to create PLT .eh_frame section\n")); | |
7692 | ||
7693 | if (!bfd_set_section_alignment (dynobj, sec, | |
7694 | ABI_64_P (dynobj) ? 3 : 2)) | |
7695 | goto error_alignment; | |
7696 | ||
7697 | htab->plt_eh_frame = sec; | |
7698 | ||
7699 | if (htab->plt_got != NULL) | |
7700 | { | |
7701 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
7702 | ".eh_frame", | |
7703 | flags); | |
7704 | if (sec == NULL) | |
7705 | info->callbacks->einfo (_("%F: failed to create GOT PLT .eh_frame section\n")); | |
7706 | ||
7707 | if (!bfd_set_section_alignment (dynobj, sec, | |
7708 | ABI_64_P (dynobj) ? 3 : 2)) | |
7709 | goto error_alignment; | |
7710 | ||
7711 | htab->plt_got_eh_frame = sec; | |
7712 | } | |
7713 | ||
f2c29a16 | 7714 | if (htab->plt_second != NULL) |
38b12349 L |
7715 | { |
7716 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
7717 | ".eh_frame", | |
7718 | flags); | |
7719 | if (sec == NULL) | |
7720 | info->callbacks->einfo (_("%F: failed to create BND PLT .eh_frame section\n")); | |
7721 | ||
7722 | if (!bfd_set_section_alignment (dynobj, sec, 3)) | |
7723 | goto error_alignment; | |
7724 | ||
f2c29a16 | 7725 | htab->plt_second_eh_frame = sec; |
38b12349 L |
7726 | } |
7727 | } | |
7728 | } | |
7729 | ||
7730 | if (normal_target) | |
7731 | { | |
7732 | /* The .iplt section is used for IFUNC symbols in static | |
7733 | executables. */ | |
7734 | sec = htab->elf.iplt; | |
7735 | if (sec != NULL | |
7736 | && !bfd_set_section_alignment (sec->owner, sec, | |
7737 | plt_alignment)) | |
7738 | goto error_alignment; | |
7739 | } | |
7740 | ||
7741 | return pbfd; | |
7742 | } | |
7743 | ||
1d4af308 L |
7744 | static bfd_boolean |
7745 | elf_x86_64_link_check_relocs (bfd *abfd, struct bfd_link_info *info) | |
7746 | { | |
7747 | if (!bfd_link_relocatable (info)) | |
7748 | { | |
7749 | /* Check for __tls_get_addr reference. */ | |
7750 | struct elf_link_hash_entry *h; | |
7751 | h = elf_link_hash_lookup (elf_hash_table (info), "__tls_get_addr", | |
7752 | FALSE, FALSE, FALSE); | |
7753 | if (h != NULL) | |
7754 | ((struct elf_x86_64_link_hash_entry *) h)->tls_get_addr = 1; | |
7755 | } | |
7756 | ||
7757 | /* Invoke the regular ELF backend linker to do all the work. */ | |
7758 | return _bfd_elf_link_check_relocs (abfd, info); | |
7759 | } | |
7760 | ||
9a2e389a | 7761 | static const struct bfd_elf_special_section |
46bed679 | 7762 | elf_x86_64_special_sections[]= |
3b22753a | 7763 | { |
0112cd26 NC |
7764 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
7765 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
7766 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
7767 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
7768 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
7769 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
7770 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
7771 | }; |
7772 | ||
6d00b590 | 7773 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
7774 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
7775 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 7776 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 7777 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 7778 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 7779 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 7780 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
7781 | |
7782 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 7783 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
7784 | #define elf_backend_want_got_plt 1 |
7785 | #define elf_backend_plt_readonly 1 | |
7786 | #define elf_backend_want_plt_sym 0 | |
7787 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 7788 | #define elf_backend_rela_normal 1 |
e41b3a13 | 7789 | #define elf_backend_plt_alignment 4 |
f7483970 | 7790 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 7791 | #define elf_backend_caches_rawsize 1 |
64f52338 | 7792 | #define elf_backend_dtrel_excludes_plt 1 |
5474d94f | 7793 | #define elf_backend_want_dynrelro 1 |
70256ad8 | 7794 | |
351f65ca | 7795 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 7796 | |
70256ad8 | 7797 | #define bfd_elf64_bfd_link_hash_table_create \ |
351f65ca | 7798 | elf_x86_64_link_hash_table_create |
351f65ca | 7799 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 7800 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 7801 | elf_x86_64_reloc_name_lookup |
70256ad8 | 7802 | |
351f65ca | 7803 | #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol |
c543bf9a | 7804 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca L |
7805 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
7806 | #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol | |
38b12349 | 7807 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
351f65ca L |
7808 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections |
7809 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
233cc9c1 | 7810 | #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms |
351f65ca | 7811 | #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook |
351f65ca L |
7812 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus |
7813 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
7814 | #ifdef CORE_HEADER |
7815 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
7816 | #endif | |
351f65ca L |
7817 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
7818 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
7819 | #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections | |
7820 | #define elf_backend_always_size_sections elf_x86_64_always_size_sections | |
74541ad4 | 7821 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 7822 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
351f65ca | 7823 | #define bfd_elf64_mkobject elf_x86_64_mkobject |
0ff2b86e | 7824 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
1d4af308 | 7825 | #define bfd_elf64_bfd_link_check_relocs elf_x86_64_link_check_relocs |
8d88c4ca | 7826 | |
d2b2c203 | 7827 | #define elf_backend_section_from_shdr \ |
351f65ca | 7828 | elf_x86_64_section_from_shdr |
d2b2c203 | 7829 | |
3b22753a | 7830 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 7831 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 7832 | #define elf_backend_add_symbol_hook \ |
351f65ca | 7833 | elf_x86_64_add_symbol_hook |
3b22753a | 7834 | #define elf_backend_symbol_processing \ |
351f65ca | 7835 | elf_x86_64_symbol_processing |
3b22753a | 7836 | #define elf_backend_common_section_index \ |
351f65ca | 7837 | elf_x86_64_common_section_index |
3b22753a | 7838 | #define elf_backend_common_section \ |
351f65ca | 7839 | elf_x86_64_common_section |
3b22753a | 7840 | #define elf_backend_common_definition \ |
351f65ca | 7841 | elf_x86_64_common_definition |
3b22753a | 7842 | #define elf_backend_merge_symbol \ |
351f65ca | 7843 | elf_x86_64_merge_symbol |
a5b4ee94 L |
7844 | #define elf_backend_merge_symbol_attribute \ |
7845 | elf_x86_64_merge_symbol_attribute | |
3b22753a | 7846 | #define elf_backend_special_sections \ |
351f65ca | 7847 | elf_x86_64_special_sections |
3b22753a | 7848 | #define elf_backend_additional_program_headers \ |
351f65ca | 7849 | elf_x86_64_additional_program_headers |
fdc90cb4 | 7850 | #define elf_backend_hash_symbol \ |
351f65ca | 7851 | elf_x86_64_hash_symbol |
8f79b794 L |
7852 | #define elf_backend_omit_section_dynsym \ |
7853 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
aec6b87e L |
7854 | #define elf_backend_fixup_symbol \ |
7855 | elf_x86_64_fixup_symbol | |
46bed679 L |
7856 | #define elf_backend_parse_gnu_properties \ |
7857 | elf_x86_64_parse_gnu_properties | |
7858 | #define elf_backend_merge_gnu_properties \ | |
7859 | elf_x86_64_merge_gnu_properties | |
38b12349 L |
7860 | #define elf_backend_setup_gnu_properties \ |
7861 | elf_x86_64_link_setup_gnu_properties | |
3b22753a | 7862 | |
8d88c4ca | 7863 | #include "elf64-target.h" |
9d7cbccd | 7864 | |
6036f486 ES |
7865 | /* CloudABI support. */ |
7866 | ||
7867 | #undef TARGET_LITTLE_SYM | |
7868 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec | |
7869 | #undef TARGET_LITTLE_NAME | |
7870 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" | |
7871 | ||
7872 | #undef ELF_OSABI | |
7873 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
7874 | ||
7875 | #undef elf64_bed | |
7876 | #define elf64_bed elf64_x86_64_cloudabi_bed | |
7877 | ||
7878 | #include "elf64-target.h" | |
7879 | ||
9d7cbccd NC |
7880 | /* FreeBSD support. */ |
7881 | ||
7882 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7883 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
9d7cbccd NC |
7884 | #undef TARGET_LITTLE_NAME |
7885 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
7886 | ||
d1036acb L |
7887 | #undef ELF_OSABI |
7888 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 7889 | |
9d7cbccd NC |
7890 | #undef elf64_bed |
7891 | #define elf64_bed elf64_x86_64_fbsd_bed | |
7892 | ||
7893 | #include "elf64-target.h" | |
8a9036a4 | 7894 | |
a6cc6b3b RO |
7895 | /* Solaris 2 support. */ |
7896 | ||
7897 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7898 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
7899 | #undef TARGET_LITTLE_NAME |
7900 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
7901 | ||
7902 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
7903 | objects won't be recognized. */ | |
7904 | #undef ELF_OSABI | |
7905 | ||
7906 | #undef elf64_bed | |
7907 | #define elf64_bed elf64_x86_64_sol2_bed | |
7908 | ||
7dc98aea RO |
7909 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
7910 | boundary. */ | |
84865015 | 7911 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
7912 | #define elf_backend_static_tls_alignment 16 |
7913 | ||
a6cc6b3b RO |
7914 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
7915 | ||
7916 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
7917 | File, p.63. */ | |
84865015 | 7918 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
7919 | #define elf_backend_want_plt_sym 1 |
7920 | ||
84865015 NC |
7921 | #undef elf_backend_strtab_flags |
7922 | #define elf_backend_strtab_flags SHF_STRINGS | |
7923 | ||
7924 | static bfd_boolean | |
5522f910 NC |
7925 | elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
7926 | bfd *obfd ATTRIBUTE_UNUSED, | |
7927 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
7928 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
7929 | { |
7930 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
7931 | and sh_link fields of Solaris specific section types. */ | |
7932 | return FALSE; | |
7933 | } | |
7934 | ||
5522f910 NC |
7935 | #undef elf_backend_copy_special_section_fields |
7936 | #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields | |
84865015 | 7937 | |
a6cc6b3b RO |
7938 | #include "elf64-target.h" |
7939 | ||
8059fb19 RM |
7940 | /* Native Client support. */ |
7941 | ||
64b384e1 RM |
7942 | static bfd_boolean |
7943 | elf64_x86_64_nacl_elf_object_p (bfd *abfd) | |
7944 | { | |
7945 | /* Set the right machine number for a NaCl x86-64 ELF64 file. */ | |
7946 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl); | |
7947 | return TRUE; | |
7948 | } | |
7949 | ||
8059fb19 | 7950 | #undef TARGET_LITTLE_SYM |
6d00b590 | 7951 | #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec |
8059fb19 RM |
7952 | #undef TARGET_LITTLE_NAME |
7953 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
7954 | #undef elf64_bed | |
7955 | #define elf64_bed elf64_x86_64_nacl_bed | |
7956 | ||
7957 | #undef ELF_MAXPAGESIZE | |
7958 | #undef ELF_MINPAGESIZE | |
7959 | #undef ELF_COMMONPAGESIZE | |
7960 | #define ELF_MAXPAGESIZE 0x10000 | |
7961 | #define ELF_MINPAGESIZE 0x10000 | |
7962 | #define ELF_COMMONPAGESIZE 0x10000 | |
7963 | ||
7964 | /* Restore defaults. */ | |
7965 | #undef ELF_OSABI | |
7966 | #undef elf_backend_static_tls_alignment | |
7967 | #undef elf_backend_want_plt_sym | |
7968 | #define elf_backend_want_plt_sym 0 | |
84865015 | 7969 | #undef elf_backend_strtab_flags |
5522f910 | 7970 | #undef elf_backend_copy_special_section_fields |
8059fb19 RM |
7971 | |
7972 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
7973 | ||
7974 | #undef elf_backend_plt_alignment | |
7975 | #define elf_backend_plt_alignment 5 | |
7976 | #define NACL_PLT_ENTRY_SIZE 64 | |
7977 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
7978 | ||
7979 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
7980 | { | |
7981 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
7982 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ | |
7983 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
7984 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
7985 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
7986 | ||
ea2d813e | 7987 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
70cc877f | 7988 | 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */ |
ea2d813e RM |
7989 | |
7990 | /* 32 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 7991 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 7992 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 7993 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 7994 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 7995 | 0x66, /* excess data16 prefix */ |
ea2d813e | 7996 | 0x90 /* nop */ |
8059fb19 RM |
7997 | }; |
7998 | ||
7999 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
8000 | { | |
8001 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
8002 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
8003 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
8004 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
8005 | ||
8006 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
3ddf1bdd | 8007 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
8008 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
8009 | ||
8010 | /* Lazy GOT entries point here (32-byte aligned). */ | |
8011 | 0x68, /* pushq immediate */ | |
8012 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
8013 | 0xe9, /* jmp relative */ | |
8014 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
8015 | ||
8016 | /* 22 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 8017 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
8018 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
8019 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ | |
8020 | }; | |
8021 | ||
8022 | /* .eh_frame covering the .plt section. */ | |
8023 | ||
8024 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
8025 | { | |
8026 | #if (PLT_CIE_LENGTH != 20 \ | |
8027 | || PLT_FDE_LENGTH != 36 \ | |
8028 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
8029 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
8030 | # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!" | |
8031 | #endif | |
8032 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
8033 | 0, 0, 0, 0, /* CIE ID */ | |
8034 | 1, /* CIE version */ | |
8035 | 'z', 'R', 0, /* Augmentation string */ | |
8036 | 1, /* Code alignment factor */ | |
8037 | 0x78, /* Data alignment factor */ | |
8038 | 16, /* Return address column */ | |
8039 | 1, /* Augmentation size */ | |
8040 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
8041 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
8042 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
8043 | DW_CFA_nop, DW_CFA_nop, | |
8044 | ||
8045 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
8046 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
8047 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
8048 | 0, 0, 0, 0, /* .plt size goes here */ | |
8049 | 0, /* Augmentation size */ | |
8050 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
8051 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
8052 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
8053 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
8054 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
8055 | 13, /* Block length */ | |
8056 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
8057 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
8058 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
8059 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
8060 | DW_CFA_nop, DW_CFA_nop | |
8061 | }; | |
8062 | ||
38b12349 | 8063 | static const struct elf_x86_64_lazy_plt_layout elf_x86_64_nacl_plt = |
8059fb19 RM |
8064 | { |
8065 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ | |
8066 | elf_x86_64_nacl_plt_entry, /* plt_entry */ | |
8067 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
8068 | 2, /* plt0_got1_offset */ | |
8069 | 9, /* plt0_got2_offset */ | |
8070 | 13, /* plt0_got2_insn_end */ | |
8071 | 3, /* plt_got_offset */ | |
8072 | 33, /* plt_reloc_offset */ | |
8073 | 38, /* plt_plt_offset */ | |
8074 | 7, /* plt_got_insn_size */ | |
8075 | 42, /* plt_plt_insn_end */ | |
8076 | 32, /* plt_lazy_offset */ | |
8077 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ | |
38b12349 L |
8078 | sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */ |
8079 | }; | |
8080 | ||
8081 | static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed = | |
8082 | { | |
8083 | is_nacl /* os */ | |
8059fb19 RM |
8084 | }; |
8085 | ||
8086 | #undef elf_backend_arch_data | |
8087 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
8088 | ||
64b384e1 RM |
8089 | #undef elf_backend_object_p |
8090 | #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p | |
5a68afcf RM |
8091 | #undef elf_backend_modify_segment_map |
8092 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
8093 | #undef elf_backend_modify_program_headers | |
8094 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
8095 | #undef elf_backend_final_write_processing |
8096 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 8097 | |
8059fb19 RM |
8098 | #include "elf64-target.h" |
8099 | ||
8100 | /* Native Client x32 support. */ | |
8101 | ||
64b384e1 RM |
8102 | static bfd_boolean |
8103 | elf32_x86_64_nacl_elf_object_p (bfd *abfd) | |
8104 | { | |
8105 | /* Set the right machine number for a NaCl x86-64 ELF32 file. */ | |
8106 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl); | |
8107 | return TRUE; | |
8108 | } | |
8109 | ||
8059fb19 | 8110 | #undef TARGET_LITTLE_SYM |
6d00b590 | 8111 | #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec |
8059fb19 RM |
8112 | #undef TARGET_LITTLE_NAME |
8113 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" | |
8114 | #undef elf32_bed | |
8115 | #define elf32_bed elf32_x86_64_nacl_bed | |
8116 | ||
8117 | #define bfd_elf32_bfd_link_hash_table_create \ | |
8118 | elf_x86_64_link_hash_table_create | |
8059fb19 RM |
8119 | #define bfd_elf32_bfd_reloc_type_lookup \ |
8120 | elf_x86_64_reloc_type_lookup | |
8121 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
8122 | elf_x86_64_reloc_name_lookup | |
8123 | #define bfd_elf32_mkobject \ | |
8124 | elf_x86_64_mkobject | |
b7365e5d L |
8125 | #define bfd_elf32_get_synthetic_symtab \ |
8126 | elf_x86_64_get_synthetic_symtab | |
1d4af308 L |
8127 | #define bfd_elf32_bfd_link_check_relocs \ |
8128 | elf_x86_64_link_check_relocs | |
8059fb19 RM |
8129 | |
8130 | #undef elf_backend_object_p | |
8131 | #define elf_backend_object_p \ | |
64b384e1 | 8132 | elf32_x86_64_nacl_elf_object_p |
8059fb19 RM |
8133 | |
8134 | #undef elf_backend_bfd_from_remote_memory | |
8135 | #define elf_backend_bfd_from_remote_memory \ | |
8136 | _bfd_elf32_bfd_from_remote_memory | |
8137 | ||
8138 | #undef elf_backend_size_info | |
8139 | #define elf_backend_size_info \ | |
8140 | _bfd_elf32_size_info | |
8141 | ||
8142 | #include "elf32-target.h" | |
8143 | ||
8144 | /* Restore defaults. */ | |
5a68afcf | 8145 | #undef elf_backend_object_p |
8059fb19 | 8146 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
8147 | #undef elf_backend_bfd_from_remote_memory |
8148 | #undef elf_backend_size_info | |
8149 | #undef elf_backend_modify_segment_map | |
8150 | #undef elf_backend_modify_program_headers | |
887badb3 | 8151 | #undef elf_backend_final_write_processing |
8059fb19 | 8152 | |
8a9036a4 L |
8153 | /* Intel L1OM support. */ |
8154 | ||
8155 | static bfd_boolean | |
8156 | elf64_l1om_elf_object_p (bfd *abfd) | |
8157 | { | |
8158 | /* Set the right machine number for an L1OM elf64 file. */ | |
8159 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
8160 | return TRUE; | |
8161 | } | |
8162 | ||
8163 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 8164 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
8165 | #undef TARGET_LITTLE_NAME |
8166 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
8167 | #undef ELF_ARCH | |
8168 | #define ELF_ARCH bfd_arch_l1om | |
8169 | ||
8170 | #undef ELF_MACHINE_CODE | |
8171 | #define ELF_MACHINE_CODE EM_L1OM | |
8172 | ||
8173 | #undef ELF_OSABI | |
8174 | ||
8175 | #undef elf64_bed | |
8176 | #define elf64_bed elf64_l1om_bed | |
8177 | ||
8178 | #undef elf_backend_object_p | |
8179 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
8180 | ||
8059fb19 RM |
8181 | /* Restore defaults. */ |
8182 | #undef ELF_MAXPAGESIZE | |
8183 | #undef ELF_MINPAGESIZE | |
8184 | #undef ELF_COMMONPAGESIZE | |
8185 | #define ELF_MAXPAGESIZE 0x200000 | |
8186 | #define ELF_MINPAGESIZE 0x1000 | |
8187 | #define ELF_COMMONPAGESIZE 0x1000 | |
8188 | #undef elf_backend_plt_alignment | |
8189 | #define elf_backend_plt_alignment 4 | |
8190 | #undef elf_backend_arch_data | |
8191 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 8192 | |
8a9036a4 L |
8193 | #include "elf64-target.h" |
8194 | ||
8195 | /* FreeBSD L1OM support. */ | |
8196 | ||
8197 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 8198 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
8199 | #undef TARGET_LITTLE_NAME |
8200 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
8201 | ||
8202 | #undef ELF_OSABI | |
8203 | #define ELF_OSABI ELFOSABI_FREEBSD | |
8204 | ||
8205 | #undef elf64_bed | |
8206 | #define elf64_bed elf64_l1om_fbsd_bed | |
8207 | ||
8a9036a4 | 8208 | #include "elf64-target.h" |
351f65ca | 8209 | |
7a9068fe L |
8210 | /* Intel K1OM support. */ |
8211 | ||
8212 | static bfd_boolean | |
8213 | elf64_k1om_elf_object_p (bfd *abfd) | |
8214 | { | |
8215 | /* Set the right machine number for an K1OM elf64 file. */ | |
8216 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
8217 | return TRUE; | |
8218 | } | |
8219 | ||
8220 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 8221 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
8222 | #undef TARGET_LITTLE_NAME |
8223 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
8224 | #undef ELF_ARCH | |
8225 | #define ELF_ARCH bfd_arch_k1om | |
8226 | ||
8227 | #undef ELF_MACHINE_CODE | |
8228 | #define ELF_MACHINE_CODE EM_K1OM | |
8229 | ||
8230 | #undef ELF_OSABI | |
8231 | ||
8232 | #undef elf64_bed | |
8233 | #define elf64_bed elf64_k1om_bed | |
8234 | ||
8235 | #undef elf_backend_object_p | |
8236 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
8237 | ||
8238 | #undef elf_backend_static_tls_alignment | |
8239 | ||
8240 | #undef elf_backend_want_plt_sym | |
8241 | #define elf_backend_want_plt_sym 0 | |
8242 | ||
8243 | #include "elf64-target.h" | |
8244 | ||
8245 | /* FreeBSD K1OM support. */ | |
8246 | ||
8247 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 8248 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
8249 | #undef TARGET_LITTLE_NAME |
8250 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
8251 | ||
8252 | #undef ELF_OSABI | |
8253 | #define ELF_OSABI ELFOSABI_FREEBSD | |
8254 | ||
8255 | #undef elf64_bed | |
8256 | #define elf64_bed elf64_k1om_fbsd_bed | |
8257 | ||
8258 | #include "elf64-target.h" | |
8259 | ||
351f65ca L |
8260 | /* 32bit x86-64 support. */ |
8261 | ||
351f65ca | 8262 | #undef TARGET_LITTLE_SYM |
6d00b590 | 8263 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
8264 | #undef TARGET_LITTLE_NAME |
8265 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 8266 | #undef elf32_bed |
351f65ca L |
8267 | |
8268 | #undef ELF_ARCH | |
8269 | #define ELF_ARCH bfd_arch_i386 | |
8270 | ||
8271 | #undef ELF_MACHINE_CODE | |
8272 | #define ELF_MACHINE_CODE EM_X86_64 | |
8273 | ||
351f65ca L |
8274 | #undef ELF_OSABI |
8275 | ||
351f65ca L |
8276 | #undef elf_backend_object_p |
8277 | #define elf_backend_object_p \ | |
8278 | elf32_x86_64_elf_object_p | |
8279 | ||
8280 | #undef elf_backend_bfd_from_remote_memory | |
8281 | #define elf_backend_bfd_from_remote_memory \ | |
8282 | _bfd_elf32_bfd_from_remote_memory | |
8283 | ||
8284 | #undef elf_backend_size_info | |
8285 | #define elf_backend_size_info \ | |
8286 | _bfd_elf32_size_info | |
8287 | ||
8288 | #include "elf32-target.h" |