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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 | |
70256ad8 AJ |
1064 | /* x86-64 ELF linker hash entry. */ |
1065 | ||
351f65ca | 1066 | struct elf_x86_64_link_hash_entry |
70256ad8 | 1067 | { |
c434dee6 | 1068 | struct elf_link_hash_entry elf; |
70256ad8 | 1069 | |
c434dee6 | 1070 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 1071 | struct elf_dyn_relocs *dyn_relocs; |
bffbf940 JJ |
1072 | |
1073 | #define GOT_UNKNOWN 0 | |
1074 | #define GOT_NORMAL 1 | |
1075 | #define GOT_TLS_GD 2 | |
1076 | #define GOT_TLS_IE 3 | |
67a4f2b7 AO |
1077 | #define GOT_TLS_GDESC 4 |
1078 | #define GOT_TLS_GD_BOTH_P(type) \ | |
1079 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
1080 | #define GOT_TLS_GD_P(type) \ | |
1081 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
1082 | #define GOT_TLS_GDESC_P(type) \ | |
1083 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
1084 | #define GOT_TLS_GD_ANY_P(type) \ | |
1085 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
bffbf940 | 1086 | unsigned char tls_type; |
67a4f2b7 | 1087 | |
bc696fd5 L |
1088 | /* TRUE if a weak symbol with a real definition needs a copy reloc. |
1089 | When there is a weak symbol with a real definition, the processor | |
1090 | independent code will have arranged for us to see the real | |
1091 | definition first. We need to copy the needs_copy bit from the | |
1092 | real definition and check it when allowing copy reloc in PIE. */ | |
1093 | unsigned int needs_copy : 1; | |
1094 | ||
aec6b87e L |
1095 | /* TRUE if symbol has GOT or PLT relocations. */ |
1096 | unsigned int has_got_reloc : 1; | |
1097 | ||
1098 | /* TRUE if symbol has non-GOT/non-PLT relocations in text sections. */ | |
1099 | unsigned int has_non_got_reloc : 1; | |
1100 | ||
9e9821dd L |
1101 | /* Don't call finish_dynamic_symbol on this symbol. */ |
1102 | unsigned int no_finish_dynamic_symbol : 1; | |
1103 | ||
1d4af308 L |
1104 | /* TRUE if symbol symbol is __tls_get_addr. */ |
1105 | unsigned int tls_get_addr : 1; | |
e2cbcd91 | 1106 | |
04ebc307 L |
1107 | /* Reference count of C/C++ function pointer relocations in read-write |
1108 | section which can be resolved at run-time. */ | |
1109 | bfd_signed_vma func_pointer_refcount; | |
1110 | ||
dd7e64d4 L |
1111 | /* Information about the GOT PLT entry. Filled when there are both |
1112 | GOT and PLT relocations against the same function. */ | |
1113 | union gotplt_union plt_got; | |
1114 | ||
f2c29a16 L |
1115 | /* Information about the second PLT entry. */ |
1116 | union gotplt_union plt_second; | |
0ff2b86e | 1117 | |
67a4f2b7 AO |
1118 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, |
1119 | starting at the end of the jump table. */ | |
1120 | bfd_vma tlsdesc_got; | |
bffbf940 JJ |
1121 | }; |
1122 | ||
351f65ca L |
1123 | #define elf_x86_64_hash_entry(ent) \ |
1124 | ((struct elf_x86_64_link_hash_entry *)(ent)) | |
bffbf940 | 1125 | |
351f65ca | 1126 | struct elf_x86_64_obj_tdata |
bffbf940 JJ |
1127 | { |
1128 | struct elf_obj_tdata root; | |
1129 | ||
1130 | /* tls_type for each local got entry. */ | |
1131 | char *local_got_tls_type; | |
67a4f2b7 AO |
1132 | |
1133 | /* GOTPLT entries for TLS descriptors. */ | |
1134 | bfd_vma *local_tlsdesc_gotent; | |
70256ad8 AJ |
1135 | }; |
1136 | ||
351f65ca L |
1137 | #define elf_x86_64_tdata(abfd) \ |
1138 | ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any) | |
bffbf940 | 1139 | |
351f65ca L |
1140 | #define elf_x86_64_local_got_tls_type(abfd) \ |
1141 | (elf_x86_64_tdata (abfd)->local_got_tls_type) | |
bffbf940 | 1142 | |
351f65ca L |
1143 | #define elf_x86_64_local_tlsdesc_gotent(abfd) \ |
1144 | (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent) | |
bffbf940 | 1145 | |
0ffa91dd NC |
1146 | #define is_x86_64_elf(bfd) \ |
1147 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
1148 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 1149 | && elf_object_id (bfd) == X86_64_ELF_DATA) |
0ffa91dd NC |
1150 | |
1151 | static bfd_boolean | |
351f65ca | 1152 | elf_x86_64_mkobject (bfd *abfd) |
0ffa91dd | 1153 | { |
351f65ca | 1154 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata), |
4dfe6ac6 | 1155 | X86_64_ELF_DATA); |
0ffa91dd NC |
1156 | } |
1157 | ||
c434dee6 | 1158 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 1159 | |
351f65ca | 1160 | struct elf_x86_64_link_hash_table |
407443a3 | 1161 | { |
c434dee6 | 1162 | struct elf_link_hash_table elf; |
70256ad8 | 1163 | |
c434dee6 | 1164 | /* Short-cuts to get to dynamic linker sections. */ |
aec6b87e | 1165 | asection *interp; |
e41b3a13 | 1166 | asection *plt_eh_frame; |
f2c29a16 L |
1167 | asection *plt_second; |
1168 | asection *plt_second_eh_frame; | |
dd7e64d4 | 1169 | asection *plt_got; |
fff53dae | 1170 | asection *plt_got_eh_frame; |
70256ad8 | 1171 | |
38b12349 L |
1172 | /* Parameters describing PLT generation, lazy or non-lazy. */ |
1173 | struct elf_x86_64_plt_layout plt; | |
1174 | ||
1175 | /* Parameters describing lazy PLT generation. */ | |
1176 | const struct elf_x86_64_lazy_plt_layout *lazy_plt; | |
1177 | ||
1178 | /* Parameters describing non-lazy PLT generation. */ | |
1179 | const struct elf_x86_64_non_lazy_plt_layout *non_lazy_plt; | |
1180 | ||
4dfe6ac6 NC |
1181 | union |
1182 | { | |
bffbf940 JJ |
1183 | bfd_signed_vma refcount; |
1184 | bfd_vma offset; | |
1185 | } tls_ld_got; | |
1186 | ||
67a4f2b7 AO |
1187 | /* The amount of space used by the jump slots in the GOT. */ |
1188 | bfd_vma sgotplt_jump_table_size; | |
1189 | ||
87d72d41 AM |
1190 | /* Small local sym cache. */ |
1191 | struct sym_cache sym_cache; | |
9f03412a | 1192 | |
351f65ca L |
1193 | bfd_vma (*r_info) (bfd_vma, bfd_vma); |
1194 | bfd_vma (*r_sym) (bfd_vma); | |
248775ba | 1195 | unsigned int pointer_r_type; |
351f65ca L |
1196 | const char *dynamic_interpreter; |
1197 | int dynamic_interpreter_size; | |
1198 | ||
9f03412a AO |
1199 | /* _TLS_MODULE_BASE_ symbol. */ |
1200 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
1201 | |
1202 | /* Used by local STT_GNU_IFUNC symbols. */ | |
1203 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
1204 | void * loc_hash_memory; |
1205 | ||
1206 | /* The offset into splt of the PLT entry for the TLS descriptor | |
1207 | resolver. Special values are 0, if not necessary (or not found | |
1208 | to be necessary yet), and -1 if needed but not determined | |
1209 | yet. */ | |
1210 | bfd_vma tlsdesc_plt; | |
1211 | /* The offset into sgot of the GOT entry used by the PLT entry | |
1212 | above. */ | |
1213 | bfd_vma tlsdesc_got; | |
e1f98742 L |
1214 | |
1215 | /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */ | |
1216 | bfd_vma next_jump_slot_index; | |
1217 | /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */ | |
1218 | bfd_vma next_irelative_index; | |
2df3368d L |
1219 | |
1220 | /* TRUE if there are dynamic relocs against IFUNC symbols that apply | |
1221 | to read-only sections. */ | |
1222 | bfd_boolean readonly_dynrelocs_against_ifunc; | |
c434dee6 | 1223 | }; |
70256ad8 AJ |
1224 | |
1225 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca | 1226 | |
351f65ca | 1227 | #define elf_x86_64_hash_table(p) \ |
4dfe6ac6 | 1228 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
351f65ca | 1229 | == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL) |
8d88c4ca | 1230 | |
351f65ca | 1231 | #define elf_x86_64_compute_jump_table_size(htab) \ |
6de2ae4a | 1232 | ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE) |
67a4f2b7 | 1233 | |
407443a3 | 1234 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
1235 | |
1236 | static struct bfd_hash_entry * | |
351f65ca L |
1237 | elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry, |
1238 | struct bfd_hash_table *table, | |
1239 | const char *string) | |
70256ad8 | 1240 | { |
70256ad8 | 1241 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
1242 | subclass. */ |
1243 | if (entry == NULL) | |
1244 | { | |
a50b1753 | 1245 | entry = (struct bfd_hash_entry *) |
eed180f8 RM |
1246 | bfd_hash_allocate (table, |
1247 | sizeof (struct elf_x86_64_link_hash_entry)); | |
c434dee6 AJ |
1248 | if (entry == NULL) |
1249 | return entry; | |
1250 | } | |
70256ad8 AJ |
1251 | |
1252 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
1253 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
1254 | if (entry != NULL) | |
70256ad8 | 1255 | { |
351f65ca | 1256 | struct elf_x86_64_link_hash_entry *eh; |
c434dee6 | 1257 | |
351f65ca | 1258 | eh = (struct elf_x86_64_link_hash_entry *) entry; |
c434dee6 | 1259 | eh->dyn_relocs = NULL; |
bffbf940 | 1260 | eh->tls_type = GOT_UNKNOWN; |
bc696fd5 | 1261 | eh->needs_copy = 0; |
aec6b87e L |
1262 | eh->has_got_reloc = 0; |
1263 | eh->has_non_got_reloc = 0; | |
9e9821dd | 1264 | eh->no_finish_dynamic_symbol = 0; |
1d4af308 | 1265 | eh->tls_get_addr = 0; |
04ebc307 | 1266 | eh->func_pointer_refcount = 0; |
f2c29a16 | 1267 | eh->plt_second.offset = (bfd_vma) -1; |
dd7e64d4 | 1268 | eh->plt_got.offset = (bfd_vma) -1; |
67a4f2b7 | 1269 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
1270 | } |
1271 | ||
c434dee6 | 1272 | return entry; |
70256ad8 AJ |
1273 | } |
1274 | ||
c25bc9fc L |
1275 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
1276 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
1277 | as global symbol. We reuse indx and dynstr_index for local symbol | |
1278 | hash since they aren't used by global symbols in this backend. */ | |
1279 | ||
1280 | static hashval_t | |
351f65ca | 1281 | elf_x86_64_local_htab_hash (const void *ptr) |
c25bc9fc L |
1282 | { |
1283 | struct elf_link_hash_entry *h | |
1284 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 1285 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
1286 | } |
1287 | ||
1288 | /* Compare local hash entries. */ | |
1289 | ||
1290 | static int | |
351f65ca | 1291 | elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2) |
c25bc9fc L |
1292 | { |
1293 | struct elf_link_hash_entry *h1 | |
1294 | = (struct elf_link_hash_entry *) ptr1; | |
1295 | struct elf_link_hash_entry *h2 | |
1296 | = (struct elf_link_hash_entry *) ptr2; | |
1297 | ||
1298 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
1299 | } | |
1300 | ||
1301 | /* Find and/or create a hash entry for local symbol. */ | |
1302 | ||
1303 | static struct elf_link_hash_entry * | |
351f65ca L |
1304 | elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab, |
1305 | bfd *abfd, const Elf_Internal_Rela *rel, | |
1306 | bfd_boolean create) | |
c25bc9fc | 1307 | { |
351f65ca | 1308 | struct elf_x86_64_link_hash_entry e, *ret; |
c25bc9fc | 1309 | asection *sec = abfd->sections; |
d2149d72 | 1310 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
351f65ca | 1311 | htab->r_sym (rel->r_info)); |
c25bc9fc L |
1312 | void **slot; |
1313 | ||
1314 | e.elf.indx = sec->id; | |
351f65ca | 1315 | e.elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc L |
1316 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, |
1317 | create ? INSERT : NO_INSERT); | |
1318 | ||
1319 | if (!slot) | |
1320 | return NULL; | |
1321 | ||
1322 | if (*slot) | |
1323 | { | |
351f65ca | 1324 | ret = (struct elf_x86_64_link_hash_entry *) *slot; |
c25bc9fc L |
1325 | return &ret->elf; |
1326 | } | |
1327 | ||
351f65ca | 1328 | ret = (struct elf_x86_64_link_hash_entry *) |
c25bc9fc | 1329 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, |
351f65ca | 1330 | sizeof (struct elf_x86_64_link_hash_entry)); |
c25bc9fc L |
1331 | if (ret) |
1332 | { | |
1333 | memset (ret, 0, sizeof (*ret)); | |
1334 | ret->elf.indx = sec->id; | |
351f65ca | 1335 | ret->elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc | 1336 | ret->elf.dynindx = -1; |
04ebc307 | 1337 | ret->func_pointer_refcount = 0; |
dd7e64d4 | 1338 | ret->plt_got.offset = (bfd_vma) -1; |
c25bc9fc L |
1339 | *slot = ret; |
1340 | } | |
1341 | return &ret->elf; | |
1342 | } | |
1343 | ||
68faa637 AM |
1344 | /* Destroy an X86-64 ELF linker hash table. */ |
1345 | ||
1346 | static void | |
d495ab0d | 1347 | elf_x86_64_link_hash_table_free (bfd *obfd) |
68faa637 AM |
1348 | { |
1349 | struct elf_x86_64_link_hash_table *htab | |
d495ab0d | 1350 | = (struct elf_x86_64_link_hash_table *) obfd->link.hash; |
68faa637 AM |
1351 | |
1352 | if (htab->loc_hash_table) | |
1353 | htab_delete (htab->loc_hash_table); | |
1354 | if (htab->loc_hash_memory) | |
1355 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
d495ab0d | 1356 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
1357 | } |
1358 | ||
8d88c4ca NC |
1359 | /* Create an X86-64 ELF linker hash table. */ |
1360 | ||
1361 | static struct bfd_link_hash_table * | |
351f65ca | 1362 | elf_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca | 1363 | { |
351f65ca L |
1364 | struct elf_x86_64_link_hash_table *ret; |
1365 | bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table); | |
8d88c4ca | 1366 | |
7bf52ea2 | 1367 | ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt); |
c434dee6 | 1368 | if (ret == NULL) |
8d88c4ca NC |
1369 | return NULL; |
1370 | ||
eb4ff4d6 | 1371 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
351f65ca L |
1372 | elf_x86_64_link_hash_newfunc, |
1373 | sizeof (struct elf_x86_64_link_hash_entry), | |
4dfe6ac6 | 1374 | X86_64_ELF_DATA)) |
8d88c4ca | 1375 | { |
e2d34d7d | 1376 | free (ret); |
8d88c4ca NC |
1377 | return NULL; |
1378 | } | |
1379 | ||
351f65ca L |
1380 | if (ABI_64_P (abfd)) |
1381 | { | |
1382 | ret->r_info = elf64_r_info; | |
1383 | ret->r_sym = elf64_r_sym; | |
248775ba | 1384 | ret->pointer_r_type = R_X86_64_64; |
351f65ca L |
1385 | ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; |
1386 | ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; | |
1387 | } | |
1388 | else | |
1389 | { | |
1390 | ret->r_info = elf32_r_info; | |
1391 | ret->r_sym = elf32_r_sym; | |
248775ba | 1392 | ret->pointer_r_type = R_X86_64_32; |
351f65ca L |
1393 | ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; |
1394 | ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER; | |
1395 | } | |
1396 | ||
c25bc9fc | 1397 | ret->loc_hash_table = htab_try_create (1024, |
351f65ca L |
1398 | elf_x86_64_local_htab_hash, |
1399 | elf_x86_64_local_htab_eq, | |
c25bc9fc L |
1400 | NULL); |
1401 | ret->loc_hash_memory = objalloc_create (); | |
1402 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
1403 | { | |
d495ab0d | 1404 | elf_x86_64_link_hash_table_free (abfd); |
c25bc9fc L |
1405 | return NULL; |
1406 | } | |
d495ab0d | 1407 | ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free; |
c25bc9fc | 1408 | |
c434dee6 AJ |
1409 | return &ret->elf.root; |
1410 | } | |
1411 | ||
c434dee6 AJ |
1412 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
1413 | ||
1414 | static void | |
351f65ca L |
1415 | elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
1416 | struct elf_link_hash_entry *dir, | |
1417 | struct elf_link_hash_entry *ind) | |
c434dee6 | 1418 | { |
351f65ca | 1419 | struct elf_x86_64_link_hash_entry *edir, *eind; |
c434dee6 | 1420 | |
351f65ca L |
1421 | edir = (struct elf_x86_64_link_hash_entry *) dir; |
1422 | eind = (struct elf_x86_64_link_hash_entry *) ind; | |
c434dee6 | 1423 | |
e81830c5 AM |
1424 | edir->has_got_reloc |= eind->has_got_reloc; |
1425 | edir->has_non_got_reloc |= eind->has_non_got_reloc; | |
aec6b87e | 1426 | |
c434dee6 AJ |
1427 | if (eind->dyn_relocs != NULL) |
1428 | { | |
1429 | if (edir->dyn_relocs != NULL) | |
1430 | { | |
e03a8ed8 L |
1431 | struct elf_dyn_relocs **pp; |
1432 | struct elf_dyn_relocs *p; | |
c434dee6 | 1433 | |
fcfa13d2 | 1434 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
1435 | list. Merge any entries against the same section. */ |
1436 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1437 | { | |
e03a8ed8 | 1438 | struct elf_dyn_relocs *q; |
c434dee6 AJ |
1439 | |
1440 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1441 | if (q->sec == p->sec) | |
1442 | { | |
1443 | q->pc_count += p->pc_count; | |
1444 | q->count += p->count; | |
1445 | *pp = p->next; | |
1446 | break; | |
1447 | } | |
1448 | if (q == NULL) | |
1449 | pp = &p->next; | |
1450 | } | |
1451 | *pp = edir->dyn_relocs; | |
1452 | } | |
1453 | ||
1454 | edir->dyn_relocs = eind->dyn_relocs; | |
1455 | eind->dyn_relocs = NULL; | |
1456 | } | |
1457 | ||
bffbf940 JJ |
1458 | if (ind->root.type == bfd_link_hash_indirect |
1459 | && dir->got.refcount <= 0) | |
1460 | { | |
1461 | edir->tls_type = eind->tls_type; | |
1462 | eind->tls_type = GOT_UNKNOWN; | |
1463 | } | |
1464 | ||
d40d037c AJ |
1465 | if (ELIMINATE_COPY_RELOCS |
1466 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1467 | && dir->dynamic_adjusted) |
1468 | { | |
1469 | /* If called to transfer flags for a weakdef during processing | |
1470 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1471 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
e81830c5 AM |
1472 | if (dir->versioned != versioned_hidden) |
1473 | dir->ref_dynamic |= ind->ref_dynamic; | |
f5385ebf AM |
1474 | dir->ref_regular |= ind->ref_regular; |
1475 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1476 | dir->needs_plt |= ind->needs_plt; | |
1477 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1478 | } | |
d40d037c | 1479 | else |
04ebc307 L |
1480 | { |
1481 | if (eind->func_pointer_refcount > 0) | |
1482 | { | |
1483 | edir->func_pointer_refcount += eind->func_pointer_refcount; | |
1484 | eind->func_pointer_refcount = 0; | |
1485 | } | |
1486 | ||
1487 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
1488 | } | |
8d88c4ca NC |
1489 | } |
1490 | ||
b34976b6 | 1491 | static bfd_boolean |
27482721 | 1492 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 1493 | { |
8d88c4ca NC |
1494 | /* Set the right machine number for an x86-64 elf64 file. */ |
1495 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 1496 | return TRUE; |
8d88c4ca NC |
1497 | } |
1498 | ||
8059fb19 RM |
1499 | static bfd_boolean |
1500 | elf32_x86_64_elf_object_p (bfd *abfd) | |
1501 | { | |
1502 | /* Set the right machine number for an x86-64 elf32 file. */ | |
1503 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
1504 | return TRUE; | |
1505 | } | |
1506 | ||
142411ca L |
1507 | /* Return TRUE if the TLS access code sequence support transition |
1508 | from R_TYPE. */ | |
1509 | ||
1510 | static bfd_boolean | |
351f65ca L |
1511 | elf_x86_64_check_tls_transition (bfd *abfd, |
1512 | struct bfd_link_info *info, | |
1513 | asection *sec, | |
1514 | bfd_byte *contents, | |
1515 | Elf_Internal_Shdr *symtab_hdr, | |
1516 | struct elf_link_hash_entry **sym_hashes, | |
1517 | unsigned int r_type, | |
1518 | const Elf_Internal_Rela *rel, | |
1519 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1520 | { |
142411ca L |
1521 | unsigned int val; |
1522 | unsigned long r_symndx; | |
5c98a14e | 1523 | bfd_boolean largepic = FALSE; |
142411ca L |
1524 | struct elf_link_hash_entry *h; |
1525 | bfd_vma offset; | |
351f65ca | 1526 | struct elf_x86_64_link_hash_table *htab; |
e2cbcd91 | 1527 | bfd_byte *call; |
1d4af308 | 1528 | bfd_boolean indirect_call; |
142411ca | 1529 | |
351f65ca | 1530 | htab = elf_x86_64_hash_table (info); |
142411ca | 1531 | offset = rel->r_offset; |
bffbf940 | 1532 | switch (r_type) |
142411ca L |
1533 | { |
1534 | case R_X86_64_TLSGD: | |
1535 | case R_X86_64_TLSLD: | |
1536 | if ((rel + 1) >= relend) | |
1537 | return FALSE; | |
1538 | ||
1539 | if (r_type == R_X86_64_TLSGD) | |
1540 | { | |
52bc799a | 1541 | /* Check transition from GD access model. For 64bit, only |
142411ca | 1542 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
e2cbcd91 L |
1543 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1544 | or | |
1545 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
1546 | .byte 0x66; rex64 | |
1547 | call *__tls_get_addr@GOTPCREL(%rip) | |
1548 | which may be converted to | |
1549 | addr32 call __tls_get_addr | |
52bc799a L |
1550 | can transit to different access model. For 32bit, only |
1551 | leaq foo@tlsgd(%rip), %rdi | |
e2cbcd91 L |
1552 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1553 | or | |
1554 | leaq foo@tlsgd(%rip), %rdi | |
1555 | .byte 0x66; rex64 | |
1556 | call *__tls_get_addr@GOTPCREL(%rip) | |
1557 | which may be converted to | |
1558 | addr32 call __tls_get_addr | |
1559 | can transit to different access model. For largepic, | |
5c98a14e | 1560 | we also support: |
e2cbcd91 L |
1561 | leaq foo@tlsgd(%rip), %rdi |
1562 | movabsq $__tls_get_addr@pltoff, %rax | |
1563 | addq $r15, %rax | |
1564 | call *%rax | |
1565 | or | |
5c98a14e JJ |
1566 | leaq foo@tlsgd(%rip), %rdi |
1567 | movabsq $__tls_get_addr@pltoff, %rax | |
1568 | addq $rbx, %rax | |
e2cbcd91 | 1569 | call *%rax */ |
142411ca | 1570 | |
fa289a5f AM |
1571 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; |
1572 | ||
5c98a14e | 1573 | if ((offset + 12) > sec->size) |
142411ca | 1574 | return FALSE; |
52bc799a | 1575 | |
e2cbcd91 L |
1576 | call = contents + offset + 4; |
1577 | if (call[0] != 0x66 | |
1578 | || !((call[1] == 0x48 | |
1579 | && call[2] == 0xff | |
1580 | && call[3] == 0x15) | |
1581 | || (call[1] == 0x48 | |
1582 | && call[2] == 0x67 | |
1583 | && call[3] == 0xe8) | |
1584 | || (call[1] == 0x66 | |
1585 | && call[2] == 0x48 | |
1586 | && call[3] == 0xe8))) | |
5c98a14e JJ |
1587 | { |
1588 | if (!ABI_64_P (abfd) | |
1589 | || (offset + 19) > sec->size | |
1590 | || offset < 3 | |
e2cbcd91 L |
1591 | || memcmp (call - 7, leaq + 1, 3) != 0 |
1592 | || memcmp (call, "\x48\xb8", 2) != 0 | |
1593 | || call[11] != 0x01 | |
1594 | || call[13] != 0xff | |
1595 | || call[14] != 0xd0 | |
1596 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1597 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1598 | return FALSE; |
1599 | largepic = TRUE; | |
1600 | } | |
1601 | else if (ABI_64_P (abfd)) | |
52bc799a | 1602 | { |
52bc799a | 1603 | if (offset < 4 |
fa289a5f | 1604 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1605 | return FALSE; |
1606 | } | |
1607 | else | |
1608 | { | |
52bc799a | 1609 | if (offset < 3 |
fa289a5f | 1610 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1611 | return FALSE; |
1612 | } | |
e2cbcd91 | 1613 | indirect_call = call[2] == 0xff; |
142411ca L |
1614 | } |
1615 | else | |
1616 | { | |
1617 | /* Check transition from LD access model. Only | |
1618 | leaq foo@tlsld(%rip), %rdi; | |
e2cbcd91 L |
1619 | call __tls_get_addr@PLT |
1620 | or | |
1621 | leaq foo@tlsld(%rip), %rdi; | |
1622 | call *__tls_get_addr@GOTPCREL(%rip) | |
1623 | which may be converted to | |
1624 | addr32 call __tls_get_addr | |
5c98a14e JJ |
1625 | can transit to different access model. For largepic |
1626 | we also support: | |
e2cbcd91 L |
1627 | leaq foo@tlsld(%rip), %rdi |
1628 | movabsq $__tls_get_addr@pltoff, %rax | |
1629 | addq $r15, %rax | |
1630 | call *%rax | |
1631 | or | |
5c98a14e JJ |
1632 | leaq foo@tlsld(%rip), %rdi |
1633 | movabsq $__tls_get_addr@pltoff, %rax | |
1634 | addq $rbx, %rax | |
e2cbcd91 | 1635 | call *%rax */ |
142411ca | 1636 | |
fa289a5f | 1637 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1638 | |
1639 | if (offset < 3 || (offset + 9) > sec->size) | |
1640 | return FALSE; | |
1641 | ||
5c98a14e | 1642 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
142411ca | 1643 | return FALSE; |
5c98a14e | 1644 | |
e2cbcd91 L |
1645 | call = contents + offset + 4; |
1646 | if (!(call[0] == 0xe8 | |
1647 | || (call[0] == 0xff && call[1] == 0x15) | |
1648 | || (call[0] == 0x67 && call[1] == 0xe8))) | |
5c98a14e JJ |
1649 | { |
1650 | if (!ABI_64_P (abfd) | |
1651 | || (offset + 19) > sec->size | |
e2cbcd91 L |
1652 | || memcmp (call, "\x48\xb8", 2) != 0 |
1653 | || call[11] != 0x01 | |
1654 | || call[13] != 0xff | |
1655 | || call[14] != 0xd0 | |
1656 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1657 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1658 | return FALSE; |
1659 | largepic = TRUE; | |
1660 | } | |
e2cbcd91 | 1661 | indirect_call = call[0] == 0xff; |
142411ca L |
1662 | } |
1663 | ||
351f65ca | 1664 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1665 | if (r_symndx < symtab_hdr->sh_info) |
1666 | return FALSE; | |
1667 | ||
1668 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1d4af308 L |
1669 | if (h == NULL |
1670 | || !((struct elf_x86_64_link_hash_entry *) h)->tls_get_addr) | |
e2cbcd91 L |
1671 | return FALSE; |
1672 | else if (largepic) | |
1673 | return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64; | |
1674 | else if (indirect_call) | |
1675 | return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_GOTPCRELX; | |
1676 | else | |
1677 | return (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32 | |
1678 | || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
142411ca L |
1679 | |
1680 | case R_X86_64_GOTTPOFF: | |
1681 | /* Check transition from IE access model: | |
4a4c5f25 L |
1682 | mov foo@gottpoff(%rip), %reg |
1683 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1684 | */ |
1685 | ||
4a4c5f25 L |
1686 | /* Check REX prefix first. */ |
1687 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1688 | { | |
1689 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1690 | if (val != 0x48 && val != 0x4c) | |
1691 | { | |
1692 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1693 | if (ABI_64_P (abfd)) | |
1694 | return FALSE; | |
1695 | } | |
1696 | } | |
1697 | else | |
1698 | { | |
1699 | /* X32 may not have any REX prefix. */ | |
1700 | if (ABI_64_P (abfd)) | |
1701 | return FALSE; | |
1702 | if (offset < 2 || (offset + 3) > sec->size) | |
1703 | return FALSE; | |
1704 | } | |
142411ca L |
1705 | |
1706 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1707 | if (val != 0x8b && val != 0x03) | |
1708 | return FALSE; | |
1709 | ||
1710 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1711 | return (val & 0xc7) == 5; | |
1712 | ||
1713 | case R_X86_64_GOTPC32_TLSDESC: | |
1714 | /* Check transition from GDesc access model: | |
1715 | leaq x@tlsdesc(%rip), %rax | |
1716 | ||
1717 | Make sure it's a leaq adding rip to a 32-bit offset | |
1718 | into any register, although it's probably almost always | |
1719 | going to be rax. */ | |
1720 | ||
1721 | if (offset < 3 || (offset + 4) > sec->size) | |
1722 | return FALSE; | |
1723 | ||
1724 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1725 | if ((val & 0xfb) != 0x48) | |
1726 | return FALSE; | |
1727 | ||
1728 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1729 | return FALSE; | |
1730 | ||
1731 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1732 | return (val & 0xc7) == 0x05; | |
1733 | ||
1734 | case R_X86_64_TLSDESC_CALL: | |
1735 | /* Check transition from GDesc access model: | |
1736 | call *x@tlsdesc(%rax) | |
1737 | */ | |
1738 | if (offset + 2 <= sec->size) | |
1739 | { | |
1740 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
e2cbcd91 L |
1741 | call = contents + offset; |
1742 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1743 | } |
1744 | ||
1745 | return FALSE; | |
1746 | ||
1747 | default: | |
1748 | abort (); | |
1749 | } | |
1750 | } | |
1751 | ||
1752 | /* Return TRUE if the TLS access transition is OK or no transition | |
1753 | will be performed. Update R_TYPE if there is a transition. */ | |
1754 | ||
1755 | static bfd_boolean | |
351f65ca L |
1756 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1757 | asection *sec, bfd_byte *contents, | |
1758 | Elf_Internal_Shdr *symtab_hdr, | |
1759 | struct elf_link_hash_entry **sym_hashes, | |
1760 | unsigned int *r_type, int tls_type, | |
1761 | const Elf_Internal_Rela *rel, | |
1762 | const Elf_Internal_Rela *relend, | |
1763 | struct elf_link_hash_entry *h, | |
bedfd056 L |
1764 | unsigned long r_symndx, |
1765 | bfd_boolean from_relocate_section) | |
142411ca L |
1766 | { |
1767 | unsigned int from_type = *r_type; | |
1768 | unsigned int to_type = from_type; | |
1769 | bfd_boolean check = TRUE; | |
1770 | ||
bb1cb422 L |
1771 | /* Skip TLS transition for functions. */ |
1772 | if (h != NULL | |
1773 | && (h->type == STT_FUNC | |
1774 | || h->type == STT_GNU_IFUNC)) | |
1775 | return TRUE; | |
1776 | ||
142411ca | 1777 | switch (from_type) |
bffbf940 JJ |
1778 | { |
1779 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1780 | case R_X86_64_GOTPC32_TLSDESC: |
1781 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1782 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1783 | if (bfd_link_executable (info)) |
142411ca L |
1784 | { |
1785 | if (h == NULL) | |
1786 | to_type = R_X86_64_TPOFF32; | |
1787 | else | |
1788 | to_type = R_X86_64_GOTTPOFF; | |
1789 | } | |
1790 | ||
bedfd056 L |
1791 | /* When we are called from elf_x86_64_relocate_section, there may |
1792 | be additional transitions based on TLS_TYPE. */ | |
1793 | if (from_relocate_section) | |
142411ca L |
1794 | { |
1795 | unsigned int new_to_type = to_type; | |
1796 | ||
0e1862bb | 1797 | if (bfd_link_executable (info) |
142411ca L |
1798 | && h != NULL |
1799 | && h->dynindx == -1 | |
1800 | && tls_type == GOT_TLS_IE) | |
1801 | new_to_type = R_X86_64_TPOFF32; | |
1802 | ||
1803 | if (to_type == R_X86_64_TLSGD | |
1804 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1805 | || to_type == R_X86_64_TLSDESC_CALL) | |
1806 | { | |
1807 | if (tls_type == GOT_TLS_IE) | |
1808 | new_to_type = R_X86_64_GOTTPOFF; | |
1809 | } | |
1810 | ||
1811 | /* We checked the transition before when we were called from | |
351f65ca | 1812 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1813 | transition which hasn't been checked before. */ |
1814 | check = new_to_type != to_type && from_type == to_type; | |
1815 | to_type = new_to_type; | |
1816 | } | |
1817 | ||
1818 | break; | |
1819 | ||
bffbf940 | 1820 | case R_X86_64_TLSLD: |
0e1862bb | 1821 | if (bfd_link_executable (info)) |
142411ca L |
1822 | to_type = R_X86_64_TPOFF32; |
1823 | break; | |
1824 | ||
1825 | default: | |
1826 | return TRUE; | |
bffbf940 JJ |
1827 | } |
1828 | ||
142411ca L |
1829 | /* Return TRUE if there is no transition. */ |
1830 | if (from_type == to_type) | |
1831 | return TRUE; | |
1832 | ||
1833 | /* Check if the transition can be performed. */ | |
1834 | if (check | |
351f65ca L |
1835 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1836 | symtab_hdr, sym_hashes, | |
1837 | from_type, rel, relend)) | |
142411ca | 1838 | { |
2f629d23 | 1839 | reloc_howto_type *from, *to; |
4c544807 | 1840 | const char *name; |
142411ca | 1841 | |
351f65ca L |
1842 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1843 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1844 | |
4c544807 L |
1845 | if (h) |
1846 | name = h->root.root.string; | |
1847 | else | |
1848 | { | |
351f65ca | 1849 | struct elf_x86_64_link_hash_table *htab; |
4dfe6ac6 | 1850 | |
351f65ca | 1851 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1852 | if (htab == NULL) |
1853 | name = "*unknown*"; | |
1854 | else | |
1855 | { | |
1856 | Elf_Internal_Sym *isym; | |
1857 | ||
1858 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1859 | abfd, r_symndx); | |
1860 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1861 | } | |
4c544807 L |
1862 | } |
1863 | ||
4eca0228 | 1864 | _bfd_error_handler |
695344c0 | 1865 | /* xgettext:c-format */ |
d42c267e | 1866 | (_("%B: TLS transition from %s to %s against `%s' at %#Lx " |
142411ca | 1867 | "in section `%A' failed"), |
d42c267e | 1868 | abfd, from->name, to->name, name, rel->r_offset, sec); |
142411ca L |
1869 | bfd_set_error (bfd_error_bad_value); |
1870 | return FALSE; | |
1871 | } | |
1872 | ||
1873 | *r_type = to_type; | |
1874 | return TRUE; | |
bffbf940 JJ |
1875 | } |
1876 | ||
c1d11331 L |
1877 | /* Rename some of the generic section flags to better document how they |
1878 | are used here. */ | |
338c190a L |
1879 | #define need_convert_load sec_flg0 |
1880 | #define check_relocs_failed sec_flg1 | |
1881 | ||
1882 | static bfd_boolean | |
1883 | elf_x86_64_need_pic (bfd *input_bfd, asection *sec, | |
1884 | struct elf_link_hash_entry *h, | |
1885 | Elf_Internal_Shdr *symtab_hdr, | |
1886 | Elf_Internal_Sym *isym, | |
1887 | reloc_howto_type *howto) | |
1888 | { | |
1889 | const char *v = ""; | |
1890 | const char *und = ""; | |
1891 | const char *pic = ""; | |
1892 | ||
1893 | const char *name; | |
1894 | if (h) | |
1895 | { | |
1896 | name = h->root.root.string; | |
1897 | switch (ELF_ST_VISIBILITY (h->other)) | |
1898 | { | |
1899 | case STV_HIDDEN: | |
1900 | v = _("hidden symbol "); | |
1901 | break; | |
1902 | case STV_INTERNAL: | |
1903 | v = _("internal symbol "); | |
1904 | break; | |
1905 | case STV_PROTECTED: | |
1906 | v = _("protected symbol "); | |
1907 | break; | |
1908 | default: | |
1909 | v = _("symbol "); | |
1910 | pic = _("; recompile with -fPIC"); | |
1911 | break; | |
1912 | } | |
1913 | ||
1914 | if (!h->def_regular && !h->def_dynamic) | |
1915 | und = _("undefined "); | |
1916 | } | |
1917 | else | |
1918 | { | |
1919 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL); | |
1920 | pic = _("; recompile with -fPIC"); | |
1921 | } | |
1922 | ||
695344c0 | 1923 | /* xgettext:c-format */ |
4eca0228 AM |
1924 | _bfd_error_handler (_("%B: relocation %s against %s%s`%s' can " |
1925 | "not be used when making a shared object%s"), | |
1926 | input_bfd, howto->name, und, v, name, pic); | |
338c190a L |
1927 | bfd_set_error (bfd_error_bad_value); |
1928 | sec->check_relocs_failed = 1; | |
1929 | return FALSE; | |
1930 | } | |
c1d11331 | 1931 | |
c175a657 L |
1932 | /* With the local symbol, foo, we convert |
1933 | mov foo@GOTPCREL(%rip), %reg | |
1934 | to | |
1935 | lea foo(%rip), %reg | |
1936 | and convert | |
1937 | call/jmp *foo@GOTPCREL(%rip) | |
1938 | to | |
1939 | nop call foo/jmp foo nop | |
1940 | When PIC is false, convert | |
1941 | test %reg, foo@GOTPCREL(%rip) | |
1942 | to | |
1943 | test $foo, %reg | |
1944 | and convert | |
1945 | binop foo@GOTPCREL(%rip), %reg | |
1946 | to | |
1947 | binop $foo, %reg | |
1948 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1949 | instructions. */ | |
1950 | ||
1951 | static bfd_boolean | |
1952 | elf_x86_64_convert_load_reloc (bfd *abfd, asection *sec, | |
1953 | bfd_byte *contents, | |
1954 | Elf_Internal_Rela *irel, | |
1955 | struct elf_link_hash_entry *h, | |
1956 | bfd_boolean *converted, | |
1957 | struct bfd_link_info *link_info) | |
1958 | { | |
1959 | struct elf_x86_64_link_hash_table *htab; | |
1960 | bfd_boolean is_pic; | |
1961 | bfd_boolean require_reloc_pc32; | |
1962 | bfd_boolean relocx; | |
1963 | bfd_boolean to_reloc_pc32; | |
1964 | asection *tsec; | |
1965 | char symtype; | |
1966 | bfd_signed_vma raddend; | |
1967 | unsigned int opcode; | |
1968 | unsigned int modrm; | |
1969 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
1970 | unsigned int r_symndx; | |
1971 | bfd_vma toff; | |
1972 | bfd_vma roff = irel->r_offset; | |
1973 | ||
1974 | if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2)) | |
1975 | return TRUE; | |
1976 | ||
1977 | raddend = irel->r_addend; | |
1978 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
1979 | if (raddend != -4) | |
1980 | return TRUE; | |
1981 | ||
1982 | htab = elf_x86_64_hash_table (link_info); | |
1983 | is_pic = bfd_link_pic (link_info); | |
1984 | ||
1985 | relocx = (r_type == R_X86_64_GOTPCRELX | |
1986 | || r_type == R_X86_64_REX_GOTPCRELX); | |
1987 | ||
1988 | /* TRUE if we can convert only to R_X86_64_PC32. Enable it for | |
1989 | --no-relax. */ | |
1990 | require_reloc_pc32 | |
1991 | = link_info->disable_target_specific_optimizations > 1; | |
1992 | ||
1993 | r_symndx = htab->r_sym (irel->r_info); | |
1994 | ||
1995 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1996 | ||
1997 | /* Convert mov to lea since it has been done for a while. */ | |
1998 | if (opcode != 0x8b) | |
1999 | { | |
2000 | /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX | |
2001 | for call, jmp or one of adc, add, and, cmp, or, sbb, sub, | |
2002 | test, xor instructions. */ | |
2003 | if (!relocx) | |
2004 | return TRUE; | |
2005 | } | |
2006 | ||
2007 | /* We convert only to R_X86_64_PC32: | |
2008 | 1. Branch. | |
2009 | 2. R_X86_64_GOTPCREL since we can't modify REX byte. | |
2010 | 3. require_reloc_pc32 is true. | |
2011 | 4. PIC. | |
2012 | */ | |
2013 | to_reloc_pc32 = (opcode == 0xff | |
2014 | || !relocx | |
2015 | || require_reloc_pc32 | |
2016 | || is_pic); | |
2017 | ||
2018 | /* Get the symbol referred to by the reloc. */ | |
2019 | if (h == NULL) | |
2020 | { | |
2021 | Elf_Internal_Sym *isym | |
2022 | = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx); | |
2023 | ||
2024 | /* Skip relocation against undefined symbols. */ | |
2025 | if (isym->st_shndx == SHN_UNDEF) | |
2026 | return TRUE; | |
2027 | ||
2028 | symtype = ELF_ST_TYPE (isym->st_info); | |
2029 | ||
2030 | if (isym->st_shndx == SHN_ABS) | |
2031 | tsec = bfd_abs_section_ptr; | |
2032 | else if (isym->st_shndx == SHN_COMMON) | |
2033 | tsec = bfd_com_section_ptr; | |
2034 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
2035 | tsec = &_bfd_elf_large_com_section; | |
2036 | else | |
2037 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
2038 | ||
2039 | toff = isym->st_value; | |
2040 | } | |
2041 | else | |
2042 | { | |
2043 | /* Undefined weak symbol is only bound locally in executable | |
2044 | and its reference is resolved as 0 without relocation | |
2045 | overflow. We can only perform this optimization for | |
2046 | GOTPCRELX relocations since we need to modify REX byte. | |
2047 | It is OK convert mov with R_X86_64_GOTPCREL to | |
2048 | R_X86_64_PC32. */ | |
2049 | if ((relocx || opcode == 0x8b) | |
2050 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, | |
2051 | TRUE, | |
2052 | elf_x86_64_hash_entry (h))) | |
2053 | { | |
2054 | if (opcode == 0xff) | |
2055 | { | |
2056 | /* Skip for branch instructions since R_X86_64_PC32 | |
2057 | may overflow. */ | |
2058 | if (require_reloc_pc32) | |
2059 | return TRUE; | |
2060 | } | |
2061 | else if (relocx) | |
2062 | { | |
2063 | /* For non-branch instructions, we can convert to | |
2064 | R_X86_64_32/R_X86_64_32S since we know if there | |
2065 | is a REX byte. */ | |
2066 | to_reloc_pc32 = FALSE; | |
2067 | } | |
2068 | ||
2069 | /* Since we don't know the current PC when PIC is true, | |
2070 | we can't convert to R_X86_64_PC32. */ | |
2071 | if (to_reloc_pc32 && is_pic) | |
2072 | return TRUE; | |
2073 | ||
2074 | goto convert; | |
2075 | } | |
2076 | /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since | |
2077 | ld.so may use its link-time address. */ | |
cbd0eecf L |
2078 | else if (h->start_stop |
2079 | || ((h->def_regular | |
2080 | || h->root.type == bfd_link_hash_defined | |
2081 | || h->root.type == bfd_link_hash_defweak) | |
2082 | && h != htab->elf.hdynamic | |
2083 | && SYMBOL_REFERENCES_LOCAL (link_info, h))) | |
c175a657 L |
2084 | { |
2085 | /* bfd_link_hash_new or bfd_link_hash_undefined is | |
2086 | set by an assignment in a linker script in | |
cbd0eecf L |
2087 | bfd_elf_record_link_assignment. start_stop is set |
2088 | on __start_SECNAME/__stop_SECNAME which mark section | |
2089 | SECNAME. */ | |
2090 | if (h->start_stop | |
2091 | || (h->def_regular | |
2092 | && (h->root.type == bfd_link_hash_new | |
2093 | || h->root.type == bfd_link_hash_undefined | |
2094 | || ((h->root.type == bfd_link_hash_defined | |
2095 | || h->root.type == bfd_link_hash_defweak) | |
2096 | && h->root.u.def.section == bfd_und_section_ptr)))) | |
c175a657 L |
2097 | { |
2098 | /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */ | |
2099 | if (require_reloc_pc32) | |
2100 | return TRUE; | |
2101 | goto convert; | |
2102 | } | |
2103 | tsec = h->root.u.def.section; | |
2104 | toff = h->root.u.def.value; | |
2105 | symtype = h->type; | |
2106 | } | |
2107 | else | |
2108 | return TRUE; | |
2109 | } | |
2110 | ||
2168b268 L |
2111 | /* Don't convert GOTPCREL relocation against large section. */ |
2112 | if (elf_section_data (tsec) != NULL | |
2113 | && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0) | |
2114 | return TRUE; | |
2115 | ||
c175a657 L |
2116 | /* We can only estimate relocation overflow for R_X86_64_PC32. */ |
2117 | if (!to_reloc_pc32) | |
2118 | goto convert; | |
2119 | ||
2120 | if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE) | |
2121 | { | |
2122 | /* At this stage in linking, no SEC_MERGE symbol has been | |
2123 | adjusted, so all references to such symbols need to be | |
2124 | passed through _bfd_merged_section_offset. (Later, in | |
2125 | relocate_section, all SEC_MERGE symbols *except* for | |
2126 | section symbols have been adjusted.) | |
2127 | ||
2128 | gas may reduce relocations against symbols in SEC_MERGE | |
2129 | sections to a relocation against the section symbol when | |
2130 | the original addend was zero. When the reloc is against | |
2131 | a section symbol we should include the addend in the | |
2132 | offset passed to _bfd_merged_section_offset, since the | |
2133 | location of interest is the original symbol. On the | |
2134 | other hand, an access to "sym+addend" where "sym" is not | |
2135 | a section symbol should not include the addend; Such an | |
2136 | access is presumed to be an offset from "sym"; The | |
2137 | location of interest is just "sym". */ | |
2138 | if (symtype == STT_SECTION) | |
2139 | toff += raddend; | |
2140 | ||
2141 | toff = _bfd_merged_section_offset (abfd, &tsec, | |
2142 | elf_section_data (tsec)->sec_info, | |
2143 | toff); | |
2144 | ||
2145 | if (symtype != STT_SECTION) | |
2146 | toff += raddend; | |
2147 | } | |
2148 | else | |
2149 | toff += raddend; | |
2150 | ||
2151 | /* Don't convert if R_X86_64_PC32 relocation overflows. */ | |
2152 | if (tsec->output_section == sec->output_section) | |
2153 | { | |
2154 | if ((toff - roff + 0x80000000) > 0xffffffff) | |
2155 | return TRUE; | |
2156 | } | |
2157 | else | |
2158 | { | |
2159 | bfd_signed_vma distance; | |
2160 | ||
2161 | /* At this point, we don't know the load addresses of TSEC | |
2162 | section nor SEC section. We estimate the distrance between | |
2163 | SEC and TSEC. We store the estimated distances in the | |
2164 | compressed_size field of the output section, which is only | |
2165 | used to decompress the compressed input section. */ | |
2166 | if (sec->output_section->compressed_size == 0) | |
2167 | { | |
2168 | asection *asect; | |
2169 | bfd_size_type size = 0; | |
2170 | for (asect = link_info->output_bfd->sections; | |
2171 | asect != NULL; | |
2172 | asect = asect->next) | |
2173 | /* Skip debug sections since compressed_size is used to | |
2174 | compress debug sections. */ | |
2175 | if ((asect->flags & SEC_DEBUGGING) == 0) | |
2176 | { | |
2177 | asection *i; | |
2178 | for (i = asect->map_head.s; | |
2179 | i != NULL; | |
2180 | i = i->map_head.s) | |
2181 | { | |
2182 | size = align_power (size, i->alignment_power); | |
2183 | size += i->size; | |
2184 | } | |
2185 | asect->compressed_size = size; | |
2186 | } | |
2187 | } | |
2188 | ||
2189 | /* Don't convert GOTPCREL relocations if TSEC isn't placed | |
2190 | after SEC. */ | |
2191 | distance = (tsec->output_section->compressed_size | |
2192 | - sec->output_section->compressed_size); | |
2193 | if (distance < 0) | |
2194 | return TRUE; | |
2195 | ||
2196 | /* Take PT_GNU_RELRO segment into account by adding | |
2197 | maxpagesize. */ | |
2198 | if ((toff + distance + get_elf_backend_data (abfd)->maxpagesize | |
2199 | - roff + 0x80000000) > 0xffffffff) | |
2200 | return TRUE; | |
2201 | } | |
2202 | ||
2203 | convert: | |
2204 | if (opcode == 0xff) | |
2205 | { | |
2206 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
2207 | unsigned int nop; | |
2208 | unsigned int disp; | |
2209 | bfd_vma nop_offset; | |
2210 | ||
2211 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
2212 | R_X86_64_PC32. */ | |
2213 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
2214 | if (modrm == 0x25) | |
2215 | { | |
2216 | /* Convert to "jmp foo nop". */ | |
2217 | modrm = 0xe9; | |
2218 | nop = NOP_OPCODE; | |
2219 | nop_offset = irel->r_offset + 3; | |
2220 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
2221 | irel->r_offset -= 1; | |
2222 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
2223 | } | |
2224 | else | |
2225 | { | |
e2cbcd91 L |
2226 | struct elf_x86_64_link_hash_entry *eh |
2227 | = (struct elf_x86_64_link_hash_entry *) h; | |
2228 | ||
c175a657 L |
2229 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
2230 | is a nop prefix. */ | |
2231 | modrm = 0xe8; | |
e2cbcd91 L |
2232 | /* To support TLS optimization, always use addr32 prefix for |
2233 | "call *__tls_get_addr@GOTPCREL(%rip)". */ | |
1d4af308 | 2234 | if (eh && eh->tls_get_addr) |
c175a657 | 2235 | { |
e2cbcd91 L |
2236 | nop = 0x67; |
2237 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
2238 | } |
2239 | else | |
e2cbcd91 L |
2240 | { |
2241 | nop = link_info->call_nop_byte; | |
2242 | if (link_info->call_nop_as_suffix) | |
2243 | { | |
2244 | nop_offset = irel->r_offset + 3; | |
2245 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
2246 | irel->r_offset -= 1; | |
2247 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
2248 | } | |
2249 | else | |
2250 | nop_offset = irel->r_offset - 2; | |
2251 | } | |
c175a657 L |
2252 | } |
2253 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
2254 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
2255 | r_type = R_X86_64_PC32; | |
2256 | } | |
2257 | else | |
2258 | { | |
2259 | unsigned int rex; | |
2260 | unsigned int rex_mask = REX_R; | |
2261 | ||
2262 | if (r_type == R_X86_64_REX_GOTPCRELX) | |
2263 | rex = bfd_get_8 (abfd, contents + roff - 3); | |
2264 | else | |
2265 | rex = 0; | |
2266 | ||
2267 | if (opcode == 0x8b) | |
2268 | { | |
2269 | if (to_reloc_pc32) | |
2270 | { | |
2271 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
2272 | "lea foo(%rip), %reg". */ | |
2273 | opcode = 0x8d; | |
2274 | r_type = R_X86_64_PC32; | |
2275 | } | |
2276 | else | |
2277 | { | |
2278 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
2279 | "mov $foo, %reg". */ | |
2280 | opcode = 0xc7; | |
2281 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
2282 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
2283 | if ((rex & REX_W) != 0 | |
2284 | && ABI_64_P (link_info->output_bfd)) | |
2285 | { | |
2286 | /* Keep the REX_W bit in REX byte for LP64. */ | |
2287 | r_type = R_X86_64_32S; | |
2288 | goto rewrite_modrm_rex; | |
2289 | } | |
2290 | else | |
2291 | { | |
2292 | /* If the REX_W bit in REX byte isn't needed, | |
2293 | use R_X86_64_32 and clear the W bit to avoid | |
2294 | sign-extend imm32 to imm64. */ | |
2295 | r_type = R_X86_64_32; | |
2296 | /* Clear the W bit in REX byte. */ | |
2297 | rex_mask |= REX_W; | |
2298 | goto rewrite_modrm_rex; | |
2299 | } | |
2300 | } | |
2301 | } | |
2302 | else | |
2303 | { | |
2304 | /* R_X86_64_PC32 isn't supported. */ | |
2305 | if (to_reloc_pc32) | |
2306 | return TRUE; | |
2307 | ||
2308 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
2309 | if (opcode == 0x85) | |
2310 | { | |
2311 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
2312 | "test $foo, %reg". */ | |
2313 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
2314 | opcode = 0xf7; | |
2315 | } | |
2316 | else | |
2317 | { | |
2318 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
2319 | "binop $foo, %reg". */ | |
2320 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
2321 | opcode = 0x81; | |
2322 | } | |
2323 | ||
2324 | /* Use R_X86_64_32 with 32-bit operand to avoid relocation | |
2325 | overflow when sign-extending imm32 to imm64. */ | |
2326 | r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32; | |
2327 | ||
2328 | rewrite_modrm_rex: | |
2329 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
2330 | ||
2331 | if (rex) | |
2332 | { | |
2333 | /* Move the R bit to the B bit in REX byte. */ | |
2334 | rex = (rex & ~rex_mask) | (rex & REX_R) >> 2; | |
2335 | bfd_put_8 (abfd, rex, contents + roff - 3); | |
2336 | } | |
2337 | ||
2338 | /* No addend for R_X86_64_32/R_X86_64_32S relocations. */ | |
2339 | irel->r_addend = 0; | |
2340 | } | |
2341 | ||
2342 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
2343 | } | |
2344 | ||
2345 | irel->r_info = htab->r_info (r_symndx, r_type); | |
2346 | ||
2347 | *converted = TRUE; | |
2348 | ||
2349 | return TRUE; | |
2350 | } | |
2351 | ||
70256ad8 | 2352 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
2353 | calculate needed space in the global offset table, procedure |
2354 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 2355 | |
b34976b6 | 2356 | static bfd_boolean |
351f65ca L |
2357 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
2358 | asection *sec, | |
2359 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 2360 | { |
351f65ca | 2361 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2362 | Elf_Internal_Shdr *symtab_hdr; |
2363 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
2364 | const Elf_Internal_Rela *rel; |
2365 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 2366 | asection *sreloc; |
bedfd056 | 2367 | bfd_byte *contents; |
70256ad8 | 2368 | |
0e1862bb | 2369 | if (bfd_link_relocatable (info)) |
b34976b6 | 2370 | return TRUE; |
70256ad8 | 2371 | |
081b1afe L |
2372 | /* Don't do anything special with non-loaded, non-alloced sections. |
2373 | In particular, any relocs in such sections should not affect GOT | |
2374 | and PLT reference counting (ie. we don't allow them to create GOT | |
2375 | or PLT entries), there's no possibility or desire to optimize TLS | |
2376 | relocs, and there's not much point in propagating relocs to shared | |
2377 | libs that the dynamic linker won't relocate. */ | |
2378 | if ((sec->flags & SEC_ALLOC) == 0) | |
2379 | return TRUE; | |
2380 | ||
0ffa91dd NC |
2381 | BFD_ASSERT (is_x86_64_elf (abfd)); |
2382 | ||
351f65ca | 2383 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 | 2384 | if (htab == NULL) |
afd9acee L |
2385 | { |
2386 | sec->check_relocs_failed = 1; | |
2387 | return FALSE; | |
2388 | } | |
4dfe6ac6 | 2389 | |
bedfd056 L |
2390 | /* Get the section contents. */ |
2391 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2392 | contents = elf_section_data (sec)->this_hdr.contents; | |
2393 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2394 | { | |
2395 | sec->check_relocs_failed = 1; | |
2396 | return FALSE; | |
2397 | } | |
2398 | ||
0ffa91dd | 2399 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 2400 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 2401 | |
c434dee6 | 2402 | sreloc = NULL; |
cbe950e9 | 2403 | |
70256ad8 AJ |
2404 | rel_end = relocs + sec->reloc_count; |
2405 | for (rel = relocs; rel < rel_end; rel++) | |
2406 | { | |
bffbf940 | 2407 | unsigned int r_type; |
d42c267e | 2408 | unsigned int r_symndx; |
70256ad8 | 2409 | struct elf_link_hash_entry *h; |
aec6b87e | 2410 | struct elf_x86_64_link_hash_entry *eh; |
4c544807 L |
2411 | Elf_Internal_Sym *isym; |
2412 | const char *name; | |
06a6a421 | 2413 | bfd_boolean size_reloc; |
70256ad8 | 2414 | |
351f65ca L |
2415 | r_symndx = htab->r_sym (rel->r_info); |
2416 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
2417 | |
2418 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
2419 | { | |
695344c0 | 2420 | /* xgettext:c-format */ |
4eca0228 AM |
2421 | _bfd_error_handler (_("%B: bad symbol index: %d"), |
2422 | abfd, r_symndx); | |
afd9acee | 2423 | goto error_return; |
c434dee6 AJ |
2424 | } |
2425 | ||
70256ad8 | 2426 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
2427 | { |
2428 | /* A local symbol. */ | |
c2e61a4e L |
2429 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
2430 | abfd, r_symndx); | |
2431 | if (isym == NULL) | |
afd9acee | 2432 | goto error_return; |
c25bc9fc L |
2433 | |
2434 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 2435 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 2436 | { |
351f65ca L |
2437 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, |
2438 | TRUE); | |
c25bc9fc | 2439 | if (h == NULL) |
afd9acee | 2440 | goto error_return; |
6bbec505 | 2441 | |
c25bc9fc | 2442 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
2443 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
2444 | isym, NULL); | |
c25bc9fc L |
2445 | h->type = STT_GNU_IFUNC; |
2446 | h->def_regular = 1; | |
2447 | h->ref_regular = 1; | |
2448 | h->forced_local = 1; | |
2449 | h->root.type = bfd_link_hash_defined; | |
2450 | } | |
2451 | else | |
2452 | h = NULL; | |
2453 | } | |
70256ad8 | 2454 | else |
71cb9464 | 2455 | { |
4c544807 | 2456 | isym = NULL; |
71cb9464 L |
2457 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
2458 | while (h->root.type == bfd_link_hash_indirect | |
2459 | || h->root.type == bfd_link_hash_warning) | |
2460 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 2461 | } |
cbe950e9 | 2462 | |
d1534d16 L |
2463 | /* Check invalid x32 relocations. */ |
2464 | if (!ABI_64_P (abfd)) | |
2465 | switch (r_type) | |
2466 | { | |
2467 | default: | |
2468 | break; | |
2469 | ||
d1534d16 L |
2470 | case R_X86_64_DTPOFF64: |
2471 | case R_X86_64_TPOFF64: | |
2472 | case R_X86_64_PC64: | |
2473 | case R_X86_64_GOTOFF64: | |
2474 | case R_X86_64_GOT64: | |
2475 | case R_X86_64_GOTPCREL64: | |
2476 | case R_X86_64_GOTPC64: | |
2477 | case R_X86_64_GOTPLT64: | |
2478 | case R_X86_64_PLTOFF64: | |
2479 | { | |
2480 | if (h) | |
2481 | name = h->root.root.string; | |
2482 | else | |
2483 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
2484 | NULL); | |
4eca0228 | 2485 | _bfd_error_handler |
695344c0 | 2486 | /* xgettext:c-format */ |
d1534d16 L |
2487 | (_("%B: relocation %s against symbol `%s' isn't " |
2488 | "supported in x32 mode"), abfd, | |
2489 | x86_64_elf_howto_table[r_type].name, name); | |
2490 | bfd_set_error (bfd_error_bad_value); | |
afd9acee | 2491 | goto error_return; |
d1534d16 L |
2492 | } |
2493 | break; | |
2494 | } | |
2495 | ||
c25bc9fc L |
2496 | if (h != NULL) |
2497 | { | |
ad1e85de L |
2498 | /* It is referenced by a non-shared object. */ |
2499 | h->ref_regular = 1; | |
bc4e12de | 2500 | h->root.non_ir_ref_regular = 1; |
13a2df29 L |
2501 | |
2502 | if (h->type == STT_GNU_IFUNC) | |
2503 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
2504 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 2505 | } |
70256ad8 | 2506 | |
bedfd056 | 2507 | if (! elf_x86_64_tls_transition (info, abfd, sec, contents, |
351f65ca L |
2508 | symtab_hdr, sym_hashes, |
2509 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 2510 | rel, rel_end, h, r_symndx, FALSE)) |
afd9acee | 2511 | goto error_return; |
142411ca | 2512 | |
aec6b87e | 2513 | eh = (struct elf_x86_64_link_hash_entry *) h; |
bffbf940 | 2514 | switch (r_type) |
70256ad8 | 2515 | { |
bffbf940 JJ |
2516 | case R_X86_64_TLSLD: |
2517 | htab->tls_ld_got.refcount += 1; | |
2518 | goto create_got; | |
2519 | ||
2520 | case R_X86_64_TPOFF32: | |
0e1862bb | 2521 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
338c190a L |
2522 | return elf_x86_64_need_pic (abfd, sec, h, symtab_hdr, isym, |
2523 | &x86_64_elf_howto_table[r_type]); | |
aec6b87e L |
2524 | if (eh != NULL) |
2525 | eh->has_got_reloc = 1; | |
bffbf940 | 2526 | break; |
c434dee6 | 2527 | |
bffbf940 | 2528 | case R_X86_64_GOTTPOFF: |
0e1862bb | 2529 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
2530 | info->flags |= DF_STATIC_TLS; |
2531 | /* Fall through */ | |
70256ad8 | 2532 | |
bffbf940 JJ |
2533 | case R_X86_64_GOT32: |
2534 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
2535 | case R_X86_64_GOTPCRELX: |
2536 | case R_X86_64_REX_GOTPCRELX: | |
bffbf940 | 2537 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
2538 | case R_X86_64_GOT64: |
2539 | case R_X86_64_GOTPCREL64: | |
2540 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
2541 | case R_X86_64_GOTPC32_TLSDESC: |
2542 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
2543 | /* This symbol requires a global offset table entry. */ |
2544 | { | |
2545 | int tls_type, old_tls_type; | |
2546 | ||
2547 | switch (r_type) | |
2548 | { | |
2549 | default: tls_type = GOT_NORMAL; break; | |
2550 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
2551 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
2552 | case R_X86_64_GOTPC32_TLSDESC: |
2553 | case R_X86_64_TLSDESC_CALL: | |
2554 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
2555 | } |
2556 | ||
2557 | if (h != NULL) | |
2558 | { | |
2559 | h->got.refcount += 1; | |
aec6b87e | 2560 | old_tls_type = eh->tls_type; |
bffbf940 JJ |
2561 | } |
2562 | else | |
2563 | { | |
2564 | bfd_signed_vma *local_got_refcounts; | |
2565 | ||
2566 | /* This is a global offset table entry for a local symbol. */ | |
2567 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2568 | if (local_got_refcounts == NULL) | |
2569 | { | |
2570 | bfd_size_type size; | |
2571 | ||
2572 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
2573 | size *= sizeof (bfd_signed_vma) |
2574 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
2575 | local_got_refcounts = ((bfd_signed_vma *) |
2576 | bfd_zalloc (abfd, size)); | |
2577 | if (local_got_refcounts == NULL) | |
afd9acee | 2578 | goto error_return; |
bffbf940 | 2579 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
351f65ca | 2580 | elf_x86_64_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 2581 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
351f65ca | 2582 | elf_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 2583 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
2584 | } |
2585 | local_got_refcounts[r_symndx] += 1; | |
2586 | old_tls_type | |
351f65ca | 2587 | = elf_x86_64_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
2588 | } |
2589 | ||
2590 | /* If a TLS symbol is accessed using IE at least once, | |
2591 | there is no point to use dynamic model for it. */ | |
2592 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
2593 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
2594 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 2595 | { |
67a4f2b7 | 2596 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 2597 | tls_type = old_tls_type; |
67a4f2b7 AO |
2598 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2599 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2600 | tls_type |= old_tls_type; | |
bffbf940 JJ |
2601 | else |
2602 | { | |
09a24cbf | 2603 | if (h) |
4c544807 L |
2604 | name = h->root.root.string; |
2605 | else | |
2606 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
2607 | isym, NULL); | |
4eca0228 | 2608 | _bfd_error_handler |
695344c0 | 2609 | /* xgettext:c-format */ |
63a5468a AM |
2610 | (_("%B: '%s' accessed both as normal and" |
2611 | " thread local symbol"), | |
4c544807 | 2612 | abfd, name); |
68c4a57e | 2613 | bfd_set_error (bfd_error_bad_value); |
afd9acee | 2614 | goto error_return; |
bffbf940 JJ |
2615 | } |
2616 | } | |
2617 | ||
2618 | if (old_tls_type != tls_type) | |
2619 | { | |
aec6b87e L |
2620 | if (eh != NULL) |
2621 | eh->tls_type = tls_type; | |
bffbf940 | 2622 | else |
351f65ca | 2623 | elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
2624 | } |
2625 | } | |
c434dee6 AJ |
2626 | /* Fall through */ |
2627 | ||
d6ab8113 JB |
2628 | case R_X86_64_GOTOFF64: |
2629 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2630 | case R_X86_64_GOTPC64: |
bffbf940 | 2631 | create_got: |
aec6b87e L |
2632 | if (eh != NULL) |
2633 | eh->has_got_reloc = 1; | |
70256ad8 AJ |
2634 | break; |
2635 | ||
2636 | case R_X86_64_PLT32: | |
c3320543 | 2637 | case R_X86_64_PLT32_BND: |
70256ad8 | 2638 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
2639 | actually build the entry in adjust_dynamic_symbol, |
2640 | because this might be a case of linking PIC code which is | |
2641 | never referenced by a dynamic object, in which case we | |
2642 | don't need to generate a procedure linkage table entry | |
2643 | after all. */ | |
70256ad8 AJ |
2644 | |
2645 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 2646 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
2647 | if (h == NULL) |
2648 | continue; | |
2649 | ||
aec6b87e | 2650 | eh->has_got_reloc = 1; |
f5385ebf | 2651 | h->needs_plt = 1; |
51b64d56 | 2652 | h->plt.refcount += 1; |
70256ad8 AJ |
2653 | break; |
2654 | ||
7b81dfbb AJ |
2655 | case R_X86_64_PLTOFF64: |
2656 | /* This tries to form the 'address' of a function relative | |
2657 | to GOT. For global symbols we need a PLT entry. */ | |
2658 | if (h != NULL) | |
2659 | { | |
2660 | h->needs_plt = 1; | |
2661 | h->plt.refcount += 1; | |
2662 | } | |
2663 | goto create_got; | |
2664 | ||
6a3e1bae L |
2665 | case R_X86_64_SIZE32: |
2666 | case R_X86_64_SIZE64: | |
06a6a421 | 2667 | size_reloc = TRUE; |
6a3e1bae L |
2668 | goto do_size; |
2669 | ||
248775ba L |
2670 | case R_X86_64_32: |
2671 | if (!ABI_64_P (abfd)) | |
2672 | goto pointer; | |
1a0670f3 | 2673 | /* Fall through. */ |
cc78d0af AJ |
2674 | case R_X86_64_8: |
2675 | case R_X86_64_16: | |
70256ad8 | 2676 | case R_X86_64_32S: |
338c190a L |
2677 | /* Check relocation overflow as these relocs may lead to |
2678 | run-time relocation overflow. Don't error out for | |
1b71fb54 | 2679 | sections we don't care about, such as debug sections or |
338c190a | 2680 | when relocation overflow check is disabled. */ |
4c10bbaa | 2681 | if (!info->no_reloc_overflow_check |
338c190a L |
2682 | && (bfd_link_pic (info) |
2683 | || (bfd_link_executable (info) | |
2684 | && h != NULL | |
2685 | && !h->def_regular | |
2686 | && h->def_dynamic | |
081b1afe | 2687 | && (sec->flags & SEC_READONLY) == 0))) |
338c190a L |
2688 | return elf_x86_64_need_pic (abfd, sec, h, symtab_hdr, isym, |
2689 | &x86_64_elf_howto_table[r_type]); | |
1b71fb54 AJ |
2690 | /* Fall through. */ |
2691 | ||
c434dee6 AJ |
2692 | case R_X86_64_PC8: |
2693 | case R_X86_64_PC16: | |
70256ad8 | 2694 | case R_X86_64_PC32: |
c3320543 | 2695 | case R_X86_64_PC32_BND: |
d6ab8113 | 2696 | case R_X86_64_PC64: |
1b71fb54 | 2697 | case R_X86_64_64: |
248775ba | 2698 | pointer: |
aec6b87e L |
2699 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
2700 | eh->has_non_got_reloc = 1; | |
bf52d7c7 L |
2701 | /* We are called after all symbols have been resolved. Only |
2702 | relocation against STT_GNU_IFUNC symbol must go through | |
2703 | PLT. */ | |
d1ed1c7d L |
2704 | if (h != NULL |
2705 | && (bfd_link_executable (info) | |
bf52d7c7 | 2706 | || h->type == STT_GNU_IFUNC)) |
c434dee6 AJ |
2707 | { |
2708 | /* If this reloc is in a read-only section, we might | |
2709 | need a copy reloc. We can't check reliably at this | |
2710 | stage whether the section is read-only, as input | |
2711 | sections have not yet been mapped to output sections. | |
2712 | Tentatively set the flag for now, and correct in | |
2713 | adjust_dynamic_symbol. */ | |
f5385ebf | 2714 | h->non_got_ref = 1; |
c434dee6 | 2715 | |
233cc9c1 L |
2716 | /* We may need a .plt entry if the symbol is a function |
2717 | defined in a shared lib or is a STT_GNU_IFUNC function | |
2718 | referenced from the code or read-only section. */ | |
2719 | if (!h->def_regular | |
2720 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
2721 | h->plt.refcount += 1; | |
2722 | ||
5db4f0d3 L |
2723 | if (r_type == R_X86_64_PC32) |
2724 | { | |
2725 | /* Since something like ".long foo - ." may be used | |
2726 | as pointer, make sure that PLT is used if foo is | |
2727 | a function defined in a shared library. */ | |
2728 | if ((sec->flags & SEC_CODE) == 0) | |
2729 | h->pointer_equality_needed = 1; | |
2730 | } | |
2731 | else if (r_type != R_X86_64_PC32_BND | |
2732 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
2733 | { |
2734 | h->pointer_equality_needed = 1; | |
2735 | /* At run-time, R_X86_64_64 can be resolved for both | |
2736 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
2737 | can only be resolved for x32. */ | |
2738 | if ((sec->flags & SEC_READONLY) == 0 | |
2739 | && (r_type == R_X86_64_64 | |
2740 | || (!ABI_64_P (abfd) | |
2741 | && (r_type == R_X86_64_32 | |
2742 | || r_type == R_X86_64_32S)))) | |
aec6b87e | 2743 | eh->func_pointer_refcount += 1; |
04ebc307 | 2744 | } |
c434dee6 | 2745 | } |
70256ad8 | 2746 | |
06a6a421 | 2747 | size_reloc = FALSE; |
6a3e1bae | 2748 | do_size: |
70256ad8 AJ |
2749 | /* If we are creating a shared library, and this is a reloc |
2750 | against a global symbol, or a non PC relative reloc | |
2751 | against a local symbol, then we need to copy the reloc | |
2752 | into the shared library. However, if we are linking with | |
2753 | -Bsymbolic, we do not need to copy a reloc against a | |
2754 | global symbol which is defined in an object we are | |
407443a3 | 2755 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
2756 | this point we have not seen all the input files, so it is |
2757 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
2758 | later (it is never cleared). In case of a weak definition, |
2759 | DEF_REGULAR may be cleared later by a strong definition in | |
2760 | a shared library. We account for that possibility below by | |
2761 | storing information in the relocs_copied field of the hash | |
2762 | table entry. A similar situation occurs when creating | |
2763 | shared libraries and symbol visibility changes render the | |
31c0ebfe | 2764 | symbol local. |
c434dee6 AJ |
2765 | |
2766 | If on the other hand, we are creating an executable, we | |
2767 | may need to keep relocations for symbols satisfied by a | |
2768 | dynamic library if we manage to avoid copy relocs for the | |
233cc9c1 L |
2769 | symbol. |
2770 | ||
2771 | Generate dynamic pointer relocation against STT_GNU_IFUNC | |
2772 | symbol in the non-code section. */ | |
081b1afe L |
2773 | if ((bfd_link_pic (info) |
2774 | && (! IS_X86_64_PCREL_TYPE (r_type) | |
2775 | || (h != NULL | |
2776 | && (! (bfd_link_pie (info) | |
2777 | || SYMBOLIC_BIND (info, h)) | |
2778 | || h->root.type == bfd_link_hash_defweak | |
2779 | || !h->def_regular)))) | |
233cc9c1 L |
2780 | || (h != NULL |
2781 | && h->type == STT_GNU_IFUNC | |
2782 | && r_type == htab->pointer_r_type | |
2783 | && (sec->flags & SEC_CODE) == 0) | |
081b1afe L |
2784 | || (ELIMINATE_COPY_RELOCS |
2785 | && !bfd_link_pic (info) | |
2786 | && h != NULL | |
2787 | && (h->root.type == bfd_link_hash_defweak | |
2788 | || !h->def_regular))) | |
70256ad8 | 2789 | { |
e03a8ed8 L |
2790 | struct elf_dyn_relocs *p; |
2791 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2792 | |
2793 | /* We must copy these reloc types into the output file. | |
2794 | Create a reloc section in dynobj and make room for | |
2795 | this reloc. */ | |
70256ad8 AJ |
2796 | if (sreloc == NULL) |
2797 | { | |
83bac4b0 | 2798 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
2799 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
2800 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 2801 | |
70256ad8 | 2802 | if (sreloc == NULL) |
afd9acee | 2803 | goto error_return; |
70256ad8 AJ |
2804 | } |
2805 | ||
c434dee6 AJ |
2806 | /* If this is a global symbol, we count the number of |
2807 | relocations we need for this symbol. */ | |
2808 | if (h != NULL) | |
aec6b87e | 2809 | head = &eh->dyn_relocs; |
c434dee6 AJ |
2810 | else |
2811 | { | |
2812 | /* Track dynamic relocs needed for local syms too. | |
2813 | We really need local syms available to do this | |
2814 | easily. Oh well. */ | |
c434dee6 | 2815 | asection *s; |
87d72d41 | 2816 | void **vpp; |
87d72d41 AM |
2817 | |
2818 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2819 | abfd, r_symndx); | |
2820 | if (isym == NULL) | |
afd9acee | 2821 | goto error_return; |
87d72d41 AM |
2822 | |
2823 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2824 | if (s == NULL) |
87d72d41 | 2825 | s = sec; |
70256ad8 | 2826 | |
e81d3500 DD |
2827 | /* Beware of type punned pointers vs strict aliasing |
2828 | rules. */ | |
2829 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2830 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2831 | } |
70256ad8 | 2832 | |
c434dee6 AJ |
2833 | p = *head; |
2834 | if (p == NULL || p->sec != sec) | |
2835 | { | |
2836 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 2837 | |
e03a8ed8 | 2838 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2839 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2840 | if (p == NULL) |
afd9acee | 2841 | goto error_return; |
c434dee6 AJ |
2842 | p->next = *head; |
2843 | *head = p; | |
2844 | p->sec = sec; | |
2845 | p->count = 0; | |
2846 | p->pc_count = 0; | |
70256ad8 | 2847 | } |
c434dee6 AJ |
2848 | |
2849 | p->count += 1; | |
06a6a421 L |
2850 | /* Count size relocation as PC-relative relocation. */ |
2851 | if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc) | |
c434dee6 | 2852 | p->pc_count += 1; |
70256ad8 AJ |
2853 | } |
2854 | break; | |
fe4770f4 AJ |
2855 | |
2856 | /* This relocation describes the C++ object vtable hierarchy. | |
2857 | Reconstruct it for later use during GC. */ | |
2858 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2859 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
afd9acee | 2860 | goto error_return; |
fe4770f4 AJ |
2861 | break; |
2862 | ||
2863 | /* This relocation describes which C++ vtable entries are actually | |
2864 | used. Record for later use during GC. */ | |
2865 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
2866 | BFD_ASSERT (h != NULL); |
2867 | if (h != NULL | |
2868 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
afd9acee | 2869 | goto error_return; |
fe4770f4 | 2870 | break; |
c434dee6 AJ |
2871 | |
2872 | default: | |
2873 | break; | |
70256ad8 | 2874 | } |
dd7e64d4 | 2875 | |
56ceb5b5 L |
2876 | if ((r_type == R_X86_64_GOTPCREL |
2877 | || r_type == R_X86_64_GOTPCRELX | |
2878 | || r_type == R_X86_64_REX_GOTPCRELX) | |
c1d11331 | 2879 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
56ceb5b5 | 2880 | sec->need_convert_load = 1; |
70256ad8 AJ |
2881 | } |
2882 | ||
bedfd056 L |
2883 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2884 | { | |
2885 | if (!info->keep_memory) | |
2886 | free (contents); | |
2887 | else | |
2888 | { | |
2889 | /* Cache the section contents for elf_link_input_bfd. */ | |
2890 | elf_section_data (sec)->this_hdr.contents = contents; | |
2891 | } | |
2892 | } | |
2893 | ||
b34976b6 | 2894 | return TRUE; |
afd9acee L |
2895 | |
2896 | error_return: | |
bedfd056 L |
2897 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2898 | free (contents); | |
afd9acee L |
2899 | sec->check_relocs_failed = 1; |
2900 | return FALSE; | |
70256ad8 AJ |
2901 | } |
2902 | ||
2903 | /* Return the section that should be marked against GC for a given | |
407443a3 | 2904 | relocation. */ |
70256ad8 AJ |
2905 | |
2906 | static asection * | |
351f65ca L |
2907 | elf_x86_64_gc_mark_hook (asection *sec, |
2908 | struct bfd_link_info *info, | |
2909 | Elf_Internal_Rela *rel, | |
2910 | struct elf_link_hash_entry *h, | |
2911 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
2912 | { |
2913 | if (h != NULL) | |
351f65ca | 2914 | switch (ELF32_R_TYPE (rel->r_info)) |
07adf181 AM |
2915 | { |
2916 | case R_X86_64_GNU_VTINHERIT: | |
2917 | case R_X86_64_GNU_VTENTRY: | |
2918 | return NULL; | |
2919 | } | |
2920 | ||
2921 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
2922 | } |
2923 | ||
aec6b87e L |
2924 | /* Remove undefined weak symbol from the dynamic symbol table if it |
2925 | is resolved to 0. */ | |
2926 | ||
2927 | static bfd_boolean | |
2928 | elf_x86_64_fixup_symbol (struct bfd_link_info *info, | |
2929 | struct elf_link_hash_entry *h) | |
2930 | { | |
2931 | if (h->dynindx != -1 | |
2932 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, | |
e62b9723 | 2933 | elf_x86_64_hash_entry (h)->has_got_reloc, |
aec6b87e L |
2934 | elf_x86_64_hash_entry (h))) |
2935 | { | |
2936 | h->dynindx = -1; | |
2937 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
2938 | h->dynstr_index); | |
2939 | } | |
2940 | return TRUE; | |
2941 | } | |
2942 | ||
70256ad8 AJ |
2943 | /* Adjust a symbol defined by a dynamic object and referenced by a |
2944 | regular object. The current definition is in some section of the | |
2945 | dynamic object, but we're not including those sections. We have to | |
2946 | change the definition to something the rest of the link can | |
407443a3 | 2947 | understand. */ |
70256ad8 | 2948 | |
b34976b6 | 2949 | static bfd_boolean |
351f65ca L |
2950 | elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
2951 | struct elf_link_hash_entry *h) | |
70256ad8 | 2952 | { |
351f65ca | 2953 | struct elf_x86_64_link_hash_table *htab; |
5474d94f | 2954 | asection *s, *srel; |
5ca5bb35 L |
2955 | struct elf_x86_64_link_hash_entry *eh; |
2956 | struct elf_dyn_relocs *p; | |
70256ad8 | 2957 | |
cbe950e9 L |
2958 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2959 | if (h->type == STT_GNU_IFUNC) | |
2960 | { | |
73bcf233 L |
2961 | /* All local STT_GNU_IFUNC references must be treate as local |
2962 | calls via local PLT. */ | |
5ca5bb35 L |
2963 | if (h->ref_regular |
2964 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2965 | { | |
73bcf233 | 2966 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2967 | struct elf_dyn_relocs **pp; |
2968 | ||
2969 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2970 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2971 | { | |
2972 | pc_count += p->pc_count; | |
2973 | p->count -= p->pc_count; | |
2974 | p->pc_count = 0; | |
73bcf233 | 2975 | count += p->count; |
5ca5bb35 L |
2976 | if (p->count == 0) |
2977 | *pp = p->next; | |
2978 | else | |
2979 | pp = &p->next; | |
2980 | } | |
2981 | ||
73bcf233 | 2982 | if (pc_count || count) |
5ca5bb35 | 2983 | { |
5ca5bb35 | 2984 | h->non_got_ref = 1; |
233cc9c1 L |
2985 | if (pc_count) |
2986 | { | |
2987 | /* Increment PLT reference count only for PC-relative | |
2988 | references. */ | |
2989 | h->needs_plt = 1; | |
2990 | if (h->plt.refcount <= 0) | |
2991 | h->plt.refcount = 1; | |
2992 | else | |
2993 | h->plt.refcount += 1; | |
2994 | } | |
5ca5bb35 L |
2995 | } |
2996 | } | |
2997 | ||
cbe950e9 L |
2998 | if (h->plt.refcount <= 0) |
2999 | { | |
3000 | h->plt.offset = (bfd_vma) -1; | |
3001 | h->needs_plt = 0; | |
3002 | } | |
3003 | return TRUE; | |
3004 | } | |
3005 | ||
70256ad8 AJ |
3006 | /* If this is a function, put it in the procedure linkage table. We |
3007 | will fill in the contents of the procedure linkage table later, | |
3008 | when we know the address of the .got section. */ | |
3009 | if (h->type == STT_FUNC | |
f5385ebf | 3010 | || h->needs_plt) |
70256ad8 | 3011 | { |
c434dee6 | 3012 | if (h->plt.refcount <= 0 |
27482721 AJ |
3013 | || SYMBOL_CALLS_LOCAL (info, h) |
3014 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
3015 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 3016 | { |
70256ad8 AJ |
3017 | /* This case can occur if we saw a PLT32 reloc in an input |
3018 | file, but the symbol was never referred to by a dynamic | |
3019 | object, or if all references were garbage collected. In | |
3020 | such a case, we don't actually need to build a procedure | |
3021 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 3022 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 3023 | h->needs_plt = 0; |
70256ad8 AJ |
3024 | } |
3025 | ||
b34976b6 | 3026 | return TRUE; |
70256ad8 | 3027 | } |
bbd7ec4a | 3028 | else |
c434dee6 AJ |
3029 | /* It's possible that we incorrectly decided a .plt reloc was |
3030 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
3031 | check_relocs. We can't decide accurately between function and | |
3032 | non-function syms in check-relocs; Objects loaded later in | |
3033 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 3034 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
3035 | |
3036 | /* If this is a weak symbol, and there is a real definition, the | |
3037 | processor independent code will have arranged for us to see the | |
407443a3 | 3038 | real definition first, and we can just use the same value. */ |
f6e332e6 | 3039 | if (h->u.weakdef != NULL) |
70256ad8 | 3040 | { |
f6e332e6 AM |
3041 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
3042 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
3043 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
3044 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 3045 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
bc696fd5 L |
3046 | { |
3047 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
3048 | h->non_got_ref = h->u.weakdef->non_got_ref; | |
3049 | eh->needs_copy = h->u.weakdef->needs_copy; | |
3050 | } | |
b34976b6 | 3051 | return TRUE; |
70256ad8 AJ |
3052 | } |
3053 | ||
3054 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 3055 | is not a function. */ |
70256ad8 AJ |
3056 | |
3057 | /* If we are creating a shared library, we must presume that the | |
3058 | only references to the symbol are via the global offset table. | |
3059 | For such cases we need not do anything here; the relocations will | |
407443a3 | 3060 | be handled correctly by relocate_section. */ |
0e1862bb | 3061 | if (!bfd_link_executable (info)) |
b34976b6 | 3062 | return TRUE; |
70256ad8 AJ |
3063 | |
3064 | /* If there are no references to this symbol that do not use the | |
3065 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 3066 | if (!h->non_got_ref) |
b34976b6 | 3067 | return TRUE; |
70256ad8 | 3068 | |
c434dee6 AJ |
3069 | /* If -z nocopyreloc was given, we won't generate them either. */ |
3070 | if (info->nocopyreloc) | |
3071 | { | |
f5385ebf | 3072 | h->non_got_ref = 0; |
b34976b6 | 3073 | return TRUE; |
c434dee6 AJ |
3074 | } |
3075 | ||
31c0ebfe | 3076 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 3077 | { |
351f65ca | 3078 | eh = (struct elf_x86_64_link_hash_entry *) h; |
d40d037c AJ |
3079 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
3080 | { | |
3081 | s = p->sec->output_section; | |
3082 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
3083 | break; | |
3084 | } | |
3085 | ||
3086 | /* If we didn't find any dynamic relocs in read-only sections, then | |
3087 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
3088 | if (p == NULL) | |
3089 | { | |
f5385ebf | 3090 | h->non_got_ref = 0; |
d40d037c AJ |
3091 | return TRUE; |
3092 | } | |
c434dee6 AJ |
3093 | } |
3094 | ||
70256ad8 | 3095 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 3096 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
3097 | an entry for this symbol in the .dynsym section. The dynamic |
3098 | object will contain position independent code, so all references | |
3099 | from the dynamic object to this symbol will go through the global | |
3100 | offset table. The dynamic linker will use the .dynsym entry to | |
3101 | determine the address it must put in the global offset table, so | |
3102 | both the dynamic object and the regular object will refer to the | |
3103 | same memory location for the variable. */ | |
3104 | ||
351f65ca | 3105 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3106 | if (htab == NULL) |
3107 | return FALSE; | |
70256ad8 AJ |
3108 | |
3109 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
3110 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 3111 | runtime process image. */ |
5474d94f AM |
3112 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
3113 | { | |
3114 | s = htab->elf.sdynrelro; | |
3115 | srel = htab->elf.sreldynrelro; | |
3116 | } | |
3117 | else | |
3118 | { | |
3119 | s = htab->elf.sdynbss; | |
3120 | srel = htab->elf.srelbss; | |
3121 | } | |
1d7e9d18 | 3122 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
70256ad8 | 3123 | { |
351f65ca L |
3124 | const struct elf_backend_data *bed; |
3125 | bed = get_elf_backend_data (info->output_bfd); | |
5474d94f | 3126 | srel->size += bed->s->sizeof_rela; |
f5385ebf | 3127 | h->needs_copy = 1; |
70256ad8 AJ |
3128 | } |
3129 | ||
6cabe1ea | 3130 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
70256ad8 AJ |
3131 | } |
3132 | ||
c434dee6 AJ |
3133 | /* Allocate space in .plt, .got and associated reloc sections for |
3134 | dynamic relocs. */ | |
3135 | ||
b34976b6 | 3136 | static bfd_boolean |
351f65ca | 3137 | elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
3138 | { |
3139 | struct bfd_link_info *info; | |
351f65ca L |
3140 | struct elf_x86_64_link_hash_table *htab; |
3141 | struct elf_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 3142 | struct elf_dyn_relocs *p; |
351f65ca | 3143 | const struct elf_backend_data *bed; |
eed180f8 | 3144 | unsigned int plt_entry_size; |
aec6b87e | 3145 | bfd_boolean resolved_to_zero; |
c434dee6 | 3146 | |
e92d460e | 3147 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 3148 | return TRUE; |
c434dee6 | 3149 | |
351f65ca | 3150 | eh = (struct elf_x86_64_link_hash_entry *) h; |
e92d460e | 3151 | |
c434dee6 | 3152 | info = (struct bfd_link_info *) inf; |
351f65ca | 3153 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3154 | if (htab == NULL) |
3155 | return FALSE; | |
351f65ca | 3156 | bed = get_elf_backend_data (info->output_bfd); |
38b12349 | 3157 | plt_entry_size = htab->plt.plt_entry_size; |
c434dee6 | 3158 | |
e62b9723 L |
3159 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
3160 | eh->has_got_reloc, | |
3161 | eh); | |
aec6b87e | 3162 | |
dd7e64d4 L |
3163 | /* We can't use the GOT PLT if pointer equality is needed since |
3164 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
3165 | linker won't update the GOT slot. We will get into an infinite | |
3166 | loop at run-time. */ | |
3167 | if (htab->plt_got != NULL | |
3168 | && h->type != STT_GNU_IFUNC | |
3169 | && !h->pointer_equality_needed | |
3170 | && h->plt.refcount > 0 | |
3171 | && h->got.refcount > 0) | |
3172 | { | |
3173 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
3174 | reloctions. */ | |
3175 | h->plt.offset = (bfd_vma) -1; | |
3176 | ||
3177 | /* Use the GOT PLT. */ | |
3178 | eh->plt_got.refcount = 1; | |
3179 | } | |
3180 | ||
04ebc307 L |
3181 | /* Clear the reference count of function pointer relocations if |
3182 | symbol isn't a normal function. */ | |
3183 | if (h->type != STT_FUNC) | |
3184 | eh->func_pointer_refcount = 0; | |
3185 | ||
cbe950e9 L |
3186 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
3187 | here if it is defined and referenced in a non-shared object. */ | |
3188 | if (h->type == STT_GNU_IFUNC | |
3189 | && h->def_regular) | |
0ff2b86e L |
3190 | { |
3191 | if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, | |
3192 | &eh->dyn_relocs, | |
2df3368d | 3193 | &htab->readonly_dynrelocs_against_ifunc, |
0ff2b86e | 3194 | plt_entry_size, |
38b12349 L |
3195 | (htab->plt.has_plt0 |
3196 | * plt_entry_size), | |
233cc9c1 | 3197 | GOT_ENTRY_SIZE, TRUE)) |
0ff2b86e | 3198 | { |
f2c29a16 | 3199 | asection *s = htab->plt_second; |
0ff2b86e L |
3200 | if (h->plt.offset != (bfd_vma) -1 && s != NULL) |
3201 | { | |
f2c29a16 L |
3202 | /* Use the second PLT section if it is created. */ |
3203 | eh->plt_second.offset = s->size; | |
0ff2b86e | 3204 | |
f2c29a16 | 3205 | /* Make room for this entry in the second PLT section. */ |
38b12349 | 3206 | s->size += htab->non_lazy_plt->plt_entry_size; |
0ff2b86e L |
3207 | } |
3208 | ||
3209 | return TRUE; | |
3210 | } | |
3211 | else | |
3212 | return FALSE; | |
3213 | } | |
04ebc307 L |
3214 | /* Don't create the PLT entry if there are only function pointer |
3215 | relocations which can be resolved at run-time. */ | |
cbe950e9 | 3216 | else if (htab->elf.dynamic_sections_created |
04ebc307 L |
3217 | && (h->plt.refcount > eh->func_pointer_refcount |
3218 | || eh->plt_got.refcount > 0)) | |
c434dee6 | 3219 | { |
dc2be3d2 | 3220 | bfd_boolean use_plt_got = eh->plt_got.refcount > 0; |
25070364 | 3221 | |
04ebc307 L |
3222 | /* Clear the reference count of function pointer relocations |
3223 | if PLT is used. */ | |
3224 | eh->func_pointer_refcount = 0; | |
3225 | ||
c434dee6 AJ |
3226 | /* Make sure this symbol is output as a dynamic symbol. |
3227 | Undefined weak syms won't yet be marked as dynamic. */ | |
3228 | if (h->dynindx == -1 | |
aec6b87e | 3229 | && !h->forced_local |
9e9821dd L |
3230 | && !resolved_to_zero |
3231 | && h->root.type == bfd_link_hash_undefweak) | |
c434dee6 | 3232 | { |
c152c796 | 3233 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 3234 | return FALSE; |
c434dee6 AJ |
3235 | } |
3236 | ||
0e1862bb | 3237 | if (bfd_link_pic (info) |
27482721 | 3238 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
c434dee6 | 3239 | { |
6de2ae4a | 3240 | asection *s = htab->elf.splt; |
f2c29a16 | 3241 | asection *second_s = htab->plt_second; |
dd7e64d4 | 3242 | asection *got_s = htab->plt_got; |
c434dee6 | 3243 | |
7c1e8d3e L |
3244 | /* If this is the first .plt entry, make room for the special |
3245 | first entry. The .plt section is used by prelink to undo | |
3246 | prelinking for dynamic relocations. */ | |
3247 | if (s->size == 0) | |
38b12349 | 3248 | s->size = htab->plt.has_plt0 * plt_entry_size; |
7c1e8d3e | 3249 | |
dd7e64d4 L |
3250 | if (use_plt_got) |
3251 | eh->plt_got.offset = got_s->size; | |
3252 | else | |
3253 | { | |
3254 | h->plt.offset = s->size; | |
f2c29a16 L |
3255 | if (second_s) |
3256 | eh->plt_second.offset = second_s->size; | |
dd7e64d4 | 3257 | } |
c434dee6 AJ |
3258 | |
3259 | /* If this symbol is not defined in a regular file, and we are | |
3260 | not generating a shared library, then set the symbol to this | |
3261 | location in the .plt. This is required to make function | |
3262 | pointers compare as equal between the normal executable and | |
3263 | the shared library. */ | |
0e1862bb | 3264 | if (! bfd_link_pic (info) |
f5385ebf | 3265 | && !h->def_regular) |
c434dee6 | 3266 | { |
dd7e64d4 | 3267 | if (use_plt_got) |
0ff2b86e | 3268 | { |
dd7e64d4 L |
3269 | /* We need to make a call to the entry of the GOT PLT |
3270 | instead of regular PLT entry. */ | |
3271 | h->root.u.def.section = got_s; | |
3272 | h->root.u.def.value = eh->plt_got.offset; | |
0ff2b86e L |
3273 | } |
3274 | else | |
3275 | { | |
f2c29a16 | 3276 | if (second_s) |
dd7e64d4 | 3277 | { |
f2c29a16 L |
3278 | /* We need to make a call to the entry of the |
3279 | second PLT instead of regular PLT entry. */ | |
3280 | h->root.u.def.section = second_s; | |
3281 | h->root.u.def.value = eh->plt_second.offset; | |
dd7e64d4 L |
3282 | } |
3283 | else | |
3284 | { | |
3285 | h->root.u.def.section = s; | |
3286 | h->root.u.def.value = h->plt.offset; | |
3287 | } | |
0ff2b86e | 3288 | } |
c434dee6 AJ |
3289 | } |
3290 | ||
3291 | /* Make room for this entry. */ | |
dd7e64d4 | 3292 | if (use_plt_got) |
38b12349 | 3293 | got_s->size += htab->non_lazy_plt->plt_entry_size; |
dd7e64d4 L |
3294 | else |
3295 | { | |
3296 | s->size += plt_entry_size; | |
f2c29a16 L |
3297 | if (second_s) |
3298 | second_s->size += htab->non_lazy_plt->plt_entry_size; | |
c434dee6 | 3299 | |
dd7e64d4 L |
3300 | /* We also need to make an entry in the .got.plt section, |
3301 | which will be placed in the .got section by the linker | |
3302 | script. */ | |
3303 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; | |
c434dee6 | 3304 | |
aec6b87e L |
3305 | /* There should be no PLT relocation against resolved |
3306 | undefined weak symbol in executable. */ | |
3307 | if (!resolved_to_zero) | |
3308 | { | |
3309 | /* We also need to make an entry in the .rela.plt | |
3310 | section. */ | |
3311 | htab->elf.srelplt->size += bed->s->sizeof_rela; | |
3312 | htab->elf.srelplt->reloc_count++; | |
3313 | } | |
dd7e64d4 | 3314 | } |
c434dee6 AJ |
3315 | } |
3316 | else | |
3317 | { | |
13f42277 | 3318 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 3319 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 3320 | h->needs_plt = 0; |
c434dee6 AJ |
3321 | } |
3322 | } | |
3323 | else | |
3324 | { | |
13f42277 | 3325 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 3326 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 3327 | h->needs_plt = 0; |
c434dee6 AJ |
3328 | } |
3329 | ||
67a4f2b7 AO |
3330 | eh->tlsdesc_got = (bfd_vma) -1; |
3331 | ||
bffbf940 JJ |
3332 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
3333 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
3334 | if (h->got.refcount > 0 | |
0e1862bb | 3335 | && bfd_link_executable (info) |
bffbf940 | 3336 | && h->dynindx == -1 |
351f65ca | 3337 | && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) |
d8045f23 NC |
3338 | { |
3339 | h->got.offset = (bfd_vma) -1; | |
3340 | } | |
bffbf940 | 3341 | else if (h->got.refcount > 0) |
c434dee6 AJ |
3342 | { |
3343 | asection *s; | |
b34976b6 | 3344 | bfd_boolean dyn; |
351f65ca | 3345 | int tls_type = elf_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
3346 | |
3347 | /* Make sure this symbol is output as a dynamic symbol. | |
3348 | Undefined weak syms won't yet be marked as dynamic. */ | |
3349 | if (h->dynindx == -1 | |
aec6b87e | 3350 | && !h->forced_local |
9e9821dd L |
3351 | && !resolved_to_zero |
3352 | && h->root.type == bfd_link_hash_undefweak) | |
c434dee6 | 3353 | { |
c152c796 | 3354 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 3355 | return FALSE; |
c434dee6 AJ |
3356 | } |
3357 | ||
67a4f2b7 AO |
3358 | if (GOT_TLS_GDESC_P (tls_type)) |
3359 | { | |
6de2ae4a | 3360 | eh->tlsdesc_got = htab->elf.sgotplt->size |
351f65ca | 3361 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 3362 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
3363 | h->got.offset = (bfd_vma) -2; |
3364 | } | |
3365 | if (! GOT_TLS_GDESC_P (tls_type) | |
3366 | || GOT_TLS_GD_P (tls_type)) | |
3367 | { | |
6de2ae4a | 3368 | s = htab->elf.sgot; |
67a4f2b7 AO |
3369 | h->got.offset = s->size; |
3370 | s->size += GOT_ENTRY_SIZE; | |
3371 | if (GOT_TLS_GD_P (tls_type)) | |
3372 | s->size += GOT_ENTRY_SIZE; | |
3373 | } | |
c434dee6 | 3374 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 | 3375 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
aec6b87e L |
3376 | and two if global. R_X86_64_GOTTPOFF needs one dynamic |
3377 | relocation. No dynamic relocation against resolved undefined | |
3378 | weak symbol in executable. */ | |
67a4f2b7 | 3379 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 3380 | || tls_type == GOT_TLS_IE) |
351f65ca | 3381 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 | 3382 | else if (GOT_TLS_GD_P (tls_type)) |
351f65ca | 3383 | htab->elf.srelgot->size += 2 * bed->s->sizeof_rela; |
67a4f2b7 | 3384 | else if (! GOT_TLS_GDESC_P (tls_type) |
aec6b87e L |
3385 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
3386 | && !resolved_to_zero) | |
67a4f2b7 | 3387 | || h->root.type != bfd_link_hash_undefweak) |
0e1862bb | 3388 | && (bfd_link_pic (info) |
27482721 | 3389 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
351f65ca | 3390 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
3391 | if (GOT_TLS_GDESC_P (tls_type)) |
3392 | { | |
351f65ca | 3393 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
3394 | htab->tlsdesc_plt = (bfd_vma) -1; |
3395 | } | |
c434dee6 AJ |
3396 | } |
3397 | else | |
3398 | h->got.offset = (bfd_vma) -1; | |
3399 | ||
c434dee6 | 3400 | if (eh->dyn_relocs == NULL) |
b34976b6 | 3401 | return TRUE; |
c434dee6 AJ |
3402 | |
3403 | /* In the shared -Bsymbolic case, discard space allocated for | |
3404 | dynamic pc-relative relocs against symbols which turn out to be | |
3405 | defined in regular objects. For the normal shared case, discard | |
3406 | space for pc-relative relocs that have become local due to symbol | |
3407 | visibility changes. */ | |
3408 | ||
0e1862bb | 3409 | if (bfd_link_pic (info)) |
c434dee6 | 3410 | { |
27482721 AJ |
3411 | /* Relocs that use pc_count are those that appear on a call |
3412 | insn, or certain REL relocs that can generated via assembly. | |
3413 | We want calls to protected symbols to resolve directly to the | |
3414 | function rather than going via the plt. If people want | |
3415 | function pointer comparisons to work as expected then they | |
3416 | should avoid writing weird assembly. */ | |
3417 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 3418 | { |
e03a8ed8 | 3419 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
3420 | |
3421 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
3422 | { | |
c3ce498c L |
3423 | p->count -= p->pc_count; |
3424 | p->pc_count = 0; | |
c434dee6 AJ |
3425 | if (p->count == 0) |
3426 | *pp = p->next; | |
3427 | else | |
3428 | pp = &p->next; | |
3429 | } | |
3430 | } | |
4e795f50 AM |
3431 | |
3432 | /* Also discard relocs on undefined weak syms with non-default | |
aec6b87e | 3433 | visibility or in PIE. */ |
31c0ebfe | 3434 | if (eh->dyn_relocs != NULL) |
22d606e9 | 3435 | { |
31c0ebfe L |
3436 | if (h->root.type == bfd_link_hash_undefweak) |
3437 | { | |
aec6b87e L |
3438 | /* Undefined weak symbol is never bound locally in shared |
3439 | library. */ | |
3440 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
3441 | || resolved_to_zero) | |
31c0ebfe | 3442 | eh->dyn_relocs = NULL; |
31c0ebfe L |
3443 | else if (h->dynindx == -1 |
3444 | && ! h->forced_local | |
3445 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
3446 | return FALSE; | |
3447 | } | |
9d1d54d5 L |
3448 | /* For PIE, discard space for pc-relative relocs against |
3449 | symbols which turn out to need copy relocs. */ | |
0e1862bb | 3450 | else if (bfd_link_executable (info) |
bc696fd5 | 3451 | && (h->needs_copy || eh->needs_copy) |
31c0ebfe L |
3452 | && h->def_dynamic |
3453 | && !h->def_regular) | |
9d1d54d5 L |
3454 | { |
3455 | struct elf_dyn_relocs **pp; | |
3456 | ||
3457 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
3458 | { | |
3459 | if (p->pc_count != 0) | |
3460 | *pp = p->next; | |
3461 | else | |
3462 | pp = &p->next; | |
3463 | } | |
3464 | } | |
22d606e9 | 3465 | } |
d8045f23 | 3466 | } |
d40d037c | 3467 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
3468 | { |
3469 | /* For the non-shared case, discard space for relocs against | |
3470 | symbols which turn out to need copy relocs or are not | |
04ebc307 L |
3471 | dynamic. Keep dynamic relocations for run-time function |
3472 | pointer initialization. */ | |
c434dee6 | 3473 | |
aec6b87e L |
3474 | if ((!h->non_got_ref |
3475 | || eh->func_pointer_refcount > 0 | |
3476 | || (h->root.type == bfd_link_hash_undefweak | |
3477 | && !resolved_to_zero)) | |
f5385ebf AM |
3478 | && ((h->def_dynamic |
3479 | && !h->def_regular) | |
c434dee6 AJ |
3480 | || (htab->elf.dynamic_sections_created |
3481 | && (h->root.type == bfd_link_hash_undefweak | |
3482 | || h->root.type == bfd_link_hash_undefined)))) | |
3483 | { | |
3484 | /* Make sure this symbol is output as a dynamic symbol. | |
3485 | Undefined weak syms won't yet be marked as dynamic. */ | |
3486 | if (h->dynindx == -1 | |
d8045f23 | 3487 | && ! h->forced_local |
aec6b87e | 3488 | && ! resolved_to_zero |
9e9821dd | 3489 | && h->root.type == bfd_link_hash_undefweak |
d8045f23 NC |
3490 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
3491 | return FALSE; | |
c434dee6 AJ |
3492 | |
3493 | /* If that succeeded, we know we'll be keeping all the | |
3494 | relocs. */ | |
3495 | if (h->dynindx != -1) | |
3496 | goto keep; | |
3497 | } | |
3498 | ||
3499 | eh->dyn_relocs = NULL; | |
04ebc307 | 3500 | eh->func_pointer_refcount = 0; |
c434dee6 AJ |
3501 | |
3502 | keep: ; | |
3503 | } | |
3504 | ||
3505 | /* Finally, allocate space. */ | |
3506 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
3507 | { | |
e7c33416 NC |
3508 | asection * sreloc; |
3509 | ||
cbe950e9 | 3510 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
3511 | |
3512 | BFD_ASSERT (sreloc != NULL); | |
3513 | ||
351f65ca | 3514 | sreloc->size += p->count * bed->s->sizeof_rela; |
c434dee6 AJ |
3515 | } |
3516 | ||
b34976b6 | 3517 | return TRUE; |
c434dee6 AJ |
3518 | } |
3519 | ||
c25bc9fc L |
3520 | /* Allocate space in .plt, .got and associated reloc sections for |
3521 | local dynamic relocs. */ | |
3522 | ||
3523 | static bfd_boolean | |
351f65ca | 3524 | elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf) |
c25bc9fc L |
3525 | { |
3526 | struct elf_link_hash_entry *h | |
3527 | = (struct elf_link_hash_entry *) *slot; | |
3528 | ||
3529 | if (h->type != STT_GNU_IFUNC | |
3530 | || !h->def_regular | |
3531 | || !h->ref_regular | |
3532 | || !h->forced_local | |
3533 | || h->root.type != bfd_link_hash_defined) | |
3534 | abort (); | |
3535 | ||
351f65ca | 3536 | return elf_x86_64_allocate_dynrelocs (h, inf); |
c25bc9fc L |
3537 | } |
3538 | ||
c434dee6 AJ |
3539 | /* Find any dynamic relocs that apply to read-only sections. */ |
3540 | ||
b34976b6 | 3541 | static bfd_boolean |
351f65ca L |
3542 | elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h, |
3543 | void * inf) | |
c434dee6 | 3544 | { |
351f65ca | 3545 | struct elf_x86_64_link_hash_entry *eh; |
e03a8ed8 | 3546 | struct elf_dyn_relocs *p; |
c434dee6 | 3547 | |
aa715242 L |
3548 | /* Skip local IFUNC symbols. */ |
3549 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
3550 | return TRUE; | |
3551 | ||
351f65ca | 3552 | eh = (struct elf_x86_64_link_hash_entry *) h; |
c434dee6 AJ |
3553 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
3554 | { | |
3555 | asection *s = p->sec->output_section; | |
3556 | ||
3557 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
3558 | { | |
3559 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
3560 | ||
3561 | info->flags |= DF_TEXTREL; | |
3562 | ||
0e1862bb | 3563 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd | 3564 | || info->error_textrel) |
695344c0 | 3565 | /* xgettext:c-format */ |
1952c5cd | 3566 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"), |
b70321a2 L |
3567 | p->sec->owner, h->root.root.string, |
3568 | p->sec); | |
3569 | ||
c434dee6 | 3570 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 3571 | return FALSE; |
c434dee6 AJ |
3572 | } |
3573 | } | |
b34976b6 | 3574 | return TRUE; |
c434dee6 AJ |
3575 | } |
3576 | ||
c175a657 | 3577 | /* Convert load via the GOT slot to load immediate. */ |
daa67607 L |
3578 | |
3579 | static bfd_boolean | |
56ceb5b5 L |
3580 | elf_x86_64_convert_load (bfd *abfd, asection *sec, |
3581 | struct bfd_link_info *link_info) | |
daa67607 L |
3582 | { |
3583 | Elf_Internal_Shdr *symtab_hdr; | |
3584 | Elf_Internal_Rela *internal_relocs; | |
3585 | Elf_Internal_Rela *irel, *irelend; | |
3586 | bfd_byte *contents; | |
3587 | struct elf_x86_64_link_hash_table *htab; | |
c175a657 | 3588 | bfd_boolean changed; |
daa67607 L |
3589 | bfd_signed_vma *local_got_refcounts; |
3590 | ||
3591 | /* Don't even try to convert non-ELF outputs. */ | |
3592 | if (!is_elf_hash_table (link_info->hash)) | |
3593 | return FALSE; | |
3594 | ||
c1d11331 | 3595 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 3596 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
56ceb5b5 | 3597 | || sec->need_convert_load == 0 |
c8831961 | 3598 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
3599 | return TRUE; |
3600 | ||
3601 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3602 | ||
3603 | /* Load the relocations for this section. */ | |
3604 | internal_relocs = (_bfd_elf_link_read_relocs | |
3605 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
3606 | link_info->keep_memory)); | |
3607 | if (internal_relocs == NULL) | |
3608 | return FALSE; | |
3609 | ||
c175a657 | 3610 | changed = FALSE; |
daa67607 | 3611 | htab = elf_x86_64_hash_table (link_info); |
daa67607 L |
3612 | local_got_refcounts = elf_local_got_refcounts (abfd); |
3613 | ||
3614 | /* Get the section contents. */ | |
3615 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
3616 | contents = elf_section_data (sec)->this_hdr.contents; | |
3617 | else | |
3618 | { | |
3619 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
3620 | goto error_return; | |
3621 | } | |
3622 | ||
3623 | irelend = internal_relocs + sec->reloc_count; | |
3624 | for (irel = internal_relocs; irel < irelend; irel++) | |
3625 | { | |
3626 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
c175a657 | 3627 | unsigned int r_symndx; |
daa67607 | 3628 | struct elf_link_hash_entry *h; |
c175a657 | 3629 | bfd_boolean converted; |
59cab532 | 3630 | |
c175a657 L |
3631 | if (r_type != R_X86_64_GOTPCRELX |
3632 | && r_type != R_X86_64_REX_GOTPCRELX | |
3633 | && r_type != R_X86_64_GOTPCREL) | |
dfc87947 L |
3634 | continue; |
3635 | ||
c175a657 | 3636 | r_symndx = htab->r_sym (irel->r_info); |
daa67607 | 3637 | if (r_symndx < symtab_hdr->sh_info) |
c175a657 L |
3638 | h = elf_x86_64_get_local_sym_hash (htab, sec->owner, |
3639 | (const Elf_Internal_Rela *) irel, | |
3640 | FALSE); | |
59cab532 L |
3641 | else |
3642 | { | |
c175a657 | 3643 | h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info]; |
59cab532 L |
3644 | while (h->root.type == bfd_link_hash_indirect |
3645 | || h->root.type == bfd_link_hash_warning) | |
3646 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
59cab532 L |
3647 | } |
3648 | ||
c175a657 L |
3649 | /* STT_GNU_IFUNC must keep GOTPCREL relocations. */ |
3650 | if (h != NULL && h->type == STT_GNU_IFUNC) | |
3651 | continue; | |
daa67607 | 3652 | |
c175a657 L |
3653 | converted = FALSE; |
3654 | if (!elf_x86_64_convert_load_reloc (abfd, sec, contents, irel, h, | |
3655 | &converted, link_info)) | |
3656 | goto error_return; | |
56ceb5b5 | 3657 | |
c175a657 | 3658 | if (converted) |
56ceb5b5 | 3659 | { |
c175a657 L |
3660 | changed = converted; |
3661 | if (h) | |
56ceb5b5 | 3662 | { |
c175a657 L |
3663 | if (h->got.refcount > 0) |
3664 | h->got.refcount -= 1; | |
56ceb5b5 L |
3665 | } |
3666 | else | |
3667 | { | |
c175a657 L |
3668 | if (local_got_refcounts != NULL |
3669 | && local_got_refcounts[r_symndx] > 0) | |
3670 | local_got_refcounts[r_symndx] -= 1; | |
56ceb5b5 | 3671 | } |
daa67607 L |
3672 | } |
3673 | } | |
3674 | ||
3675 | if (contents != NULL | |
3676 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3677 | { | |
c175a657 | 3678 | if (!changed && !link_info->keep_memory) |
daa67607 L |
3679 | free (contents); |
3680 | else | |
3681 | { | |
3682 | /* Cache the section contents for elf_link_input_bfd. */ | |
3683 | elf_section_data (sec)->this_hdr.contents = contents; | |
3684 | } | |
3685 | } | |
3686 | ||
3687 | if (elf_section_data (sec)->relocs != internal_relocs) | |
3688 | { | |
c175a657 | 3689 | if (!changed) |
daa67607 L |
3690 | free (internal_relocs); |
3691 | else | |
3692 | elf_section_data (sec)->relocs = internal_relocs; | |
3693 | } | |
3694 | ||
3695 | return TRUE; | |
3696 | ||
3697 | error_return: | |
3698 | if (contents != NULL | |
3699 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3700 | free (contents); | |
3701 | if (internal_relocs != NULL | |
3702 | && elf_section_data (sec)->relocs != internal_relocs) | |
3703 | free (internal_relocs); | |
3704 | return FALSE; | |
3705 | } | |
3706 | ||
70256ad8 AJ |
3707 | /* Set the sizes of the dynamic sections. */ |
3708 | ||
b34976b6 | 3709 | static bfd_boolean |
351f65ca L |
3710 | elf_x86_64_size_dynamic_sections (bfd *output_bfd, |
3711 | struct bfd_link_info *info) | |
70256ad8 | 3712 | { |
351f65ca | 3713 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
3714 | bfd *dynobj; |
3715 | asection *s; | |
b34976b6 | 3716 | bfd_boolean relocs; |
c434dee6 | 3717 | bfd *ibfd; |
351f65ca | 3718 | const struct elf_backend_data *bed; |
70256ad8 | 3719 | |
351f65ca | 3720 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3721 | if (htab == NULL) |
3722 | return FALSE; | |
351f65ca | 3723 | bed = get_elf_backend_data (output_bfd); |
4dfe6ac6 | 3724 | |
c434dee6 AJ |
3725 | dynobj = htab->elf.dynobj; |
3726 | if (dynobj == NULL) | |
3727 | abort (); | |
70256ad8 | 3728 | |
c434dee6 AJ |
3729 | /* Set up .got offsets for local syms, and space for local dynamic |
3730 | relocs. */ | |
c72f2fb2 | 3731 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
70256ad8 | 3732 | { |
c434dee6 AJ |
3733 | bfd_signed_vma *local_got; |
3734 | bfd_signed_vma *end_local_got; | |
bffbf940 | 3735 | char *local_tls_type; |
67a4f2b7 | 3736 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
3737 | bfd_size_type locsymcount; |
3738 | Elf_Internal_Shdr *symtab_hdr; | |
3739 | asection *srel; | |
70256ad8 | 3740 | |
0ffa91dd | 3741 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
3742 | continue; |
3743 | ||
c434dee6 | 3744 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 3745 | { |
e03a8ed8 | 3746 | struct elf_dyn_relocs *p; |
c434dee6 | 3747 | |
56ceb5b5 | 3748 | if (!elf_x86_64_convert_load (ibfd, s, info)) |
daa67607 L |
3749 | return FALSE; |
3750 | ||
e03a8ed8 | 3751 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 3752 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
3753 | p != NULL; |
3754 | p = p->next) | |
70256ad8 | 3755 | { |
c434dee6 AJ |
3756 | if (!bfd_is_abs_section (p->sec) |
3757 | && bfd_is_abs_section (p->sec->output_section)) | |
3758 | { | |
3759 | /* Input section has been discarded, either because | |
3760 | it is a copy of a linkonce section or due to | |
3761 | linker script /DISCARD/, so we'll be discarding | |
3762 | the relocs too. */ | |
3763 | } | |
3764 | else if (p->count != 0) | |
3765 | { | |
3766 | srel = elf_section_data (p->sec)->sreloc; | |
351f65ca | 3767 | srel->size += p->count * bed->s->sizeof_rela; |
4b819e1f L |
3768 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
3769 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
3770 | { |
3771 | info->flags |= DF_TEXTREL; | |
0e1862bb | 3772 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd | 3773 | || info->error_textrel) |
695344c0 | 3774 | /* xgettext:c-format */ |
1952c5cd | 3775 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), |
b70321a2 | 3776 | p->sec->owner, p->sec); |
b70321a2 | 3777 | } |
c434dee6 | 3778 | } |
70256ad8 AJ |
3779 | } |
3780 | } | |
c434dee6 AJ |
3781 | |
3782 | local_got = elf_local_got_refcounts (ibfd); | |
3783 | if (!local_got) | |
3784 | continue; | |
3785 | ||
0ffa91dd | 3786 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
3787 | locsymcount = symtab_hdr->sh_info; |
3788 | end_local_got = local_got + locsymcount; | |
351f65ca L |
3789 | local_tls_type = elf_x86_64_local_got_tls_type (ibfd); |
3790 | local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd); | |
6de2ae4a L |
3791 | s = htab->elf.sgot; |
3792 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
3793 | for (; local_got < end_local_got; |
3794 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 3795 | { |
67a4f2b7 | 3796 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 3797 | if (*local_got > 0) |
70256ad8 | 3798 | { |
67a4f2b7 AO |
3799 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
3800 | { | |
6de2ae4a | 3801 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
351f65ca | 3802 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 3803 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
3804 | *local_got = (bfd_vma) -2; |
3805 | } | |
3806 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3807 | || GOT_TLS_GD_P (*local_tls_type)) | |
3808 | { | |
3809 | *local_got = s->size; | |
3810 | s->size += GOT_ENTRY_SIZE; | |
3811 | if (GOT_TLS_GD_P (*local_tls_type)) | |
3812 | s->size += GOT_ENTRY_SIZE; | |
3813 | } | |
0e1862bb | 3814 | if (bfd_link_pic (info) |
67a4f2b7 | 3815 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 3816 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
3817 | { |
3818 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
3819 | { | |
6de2ae4a | 3820 | htab->elf.srelplt->size |
351f65ca | 3821 | += bed->s->sizeof_rela; |
67a4f2b7 AO |
3822 | htab->tlsdesc_plt = (bfd_vma) -1; |
3823 | } | |
3824 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3825 | || GOT_TLS_GD_P (*local_tls_type)) | |
351f65ca | 3826 | srel->size += bed->s->sizeof_rela; |
67a4f2b7 | 3827 | } |
70256ad8 AJ |
3828 | } |
3829 | else | |
c434dee6 AJ |
3830 | *local_got = (bfd_vma) -1; |
3831 | } | |
3832 | } | |
70256ad8 | 3833 | |
bffbf940 JJ |
3834 | if (htab->tls_ld_got.refcount > 0) |
3835 | { | |
3836 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
3837 | relocs. */ | |
6de2ae4a L |
3838 | htab->tls_ld_got.offset = htab->elf.sgot->size; |
3839 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; | |
351f65ca | 3840 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
bffbf940 JJ |
3841 | } |
3842 | else | |
3843 | htab->tls_ld_got.offset = -1; | |
3844 | ||
c434dee6 AJ |
3845 | /* Allocate global sym .plt and .got entries, and space for global |
3846 | sym dynamic relocs. */ | |
351f65ca | 3847 | elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs, |
eb4ff4d6 | 3848 | info); |
c434dee6 | 3849 | |
c25bc9fc L |
3850 | /* Allocate .plt and .got entries, and space for local symbols. */ |
3851 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 3852 | elf_x86_64_allocate_local_dynrelocs, |
c25bc9fc L |
3853 | info); |
3854 | ||
67a4f2b7 AO |
3855 | /* For every jump slot reserved in the sgotplt, reloc_count is |
3856 | incremented. However, when we reserve space for TLS descriptors, | |
3857 | it's not incremented, so in order to compute the space reserved | |
3858 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 L |
3859 | slot size. |
3860 | ||
3861 | PR ld/13302: We start next_irelative_index at the end of .rela.plt | |
3862 | so that R_X86_64_IRELATIVE entries come last. */ | |
6de2ae4a | 3863 | if (htab->elf.srelplt) |
e1f98742 L |
3864 | { |
3865 | htab->sgotplt_jump_table_size | |
3866 | = elf_x86_64_compute_jump_table_size (htab); | |
3867 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
3868 | } | |
3869 | else if (htab->elf.irelplt) | |
3870 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
67a4f2b7 AO |
3871 | |
3872 | if (htab->tlsdesc_plt) | |
3873 | { | |
3874 | /* If we're not using lazy TLS relocations, don't generate the | |
3875 | PLT and GOT entries they require. */ | |
3876 | if ((info->flags & DF_BIND_NOW)) | |
3877 | htab->tlsdesc_plt = 0; | |
3878 | else | |
3879 | { | |
6de2ae4a L |
3880 | htab->tlsdesc_got = htab->elf.sgot->size; |
3881 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
3882 | /* Reserve room for the initial entry. |
3883 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a | 3884 | if (htab->elf.splt->size == 0) |
38b12349 | 3885 | htab->elf.splt->size = htab->plt.plt_entry_size; |
6de2ae4a | 3886 | htab->tlsdesc_plt = htab->elf.splt->size; |
38b12349 | 3887 | htab->elf.splt->size += htab->plt.plt_entry_size; |
67a4f2b7 AO |
3888 | } |
3889 | } | |
3890 | ||
a7b16ceb L |
3891 | if (htab->elf.sgotplt) |
3892 | { | |
3893 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
eed180f8 | 3894 | entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
3895 | if ((htab->elf.hgot == NULL |
3896 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
3897 | && (htab->elf.sgotplt->size |
3898 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
3899 | && (htab->elf.splt == NULL |
3900 | || htab->elf.splt->size == 0) | |
3901 | && (htab->elf.sgot == NULL | |
3902 | || htab->elf.sgot->size == 0) | |
3903 | && (htab->elf.iplt == NULL | |
3904 | || htab->elf.iplt->size == 0) | |
3905 | && (htab->elf.igotplt == NULL | |
3906 | || htab->elf.igotplt->size == 0)) | |
3907 | htab->elf.sgotplt->size = 0; | |
3908 | } | |
3909 | ||
fff53dae | 3910 | if (_bfd_elf_eh_frame_present (info)) |
9a2a56cc | 3911 | { |
fff53dae L |
3912 | if (htab->plt_eh_frame != NULL |
3913 | && htab->elf.splt != NULL | |
3914 | && htab->elf.splt->size != 0 | |
3915 | && !bfd_is_abs_section (htab->elf.splt->output_section)) | |
38b12349 | 3916 | htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size; |
fff53dae L |
3917 | |
3918 | if (htab->plt_got_eh_frame != NULL | |
3919 | && htab->plt_got != NULL | |
3920 | && htab->plt_got->size != 0 | |
3921 | && !bfd_is_abs_section (htab->plt_got->output_section)) | |
38b12349 L |
3922 | htab->plt_got_eh_frame->size |
3923 | = htab->non_lazy_plt->eh_frame_plt_size; | |
8361ed4d | 3924 | |
f2c29a16 | 3925 | /* Unwind info for the second PLT and .plt.got sections are |
8361ed4d | 3926 | identical. */ |
f2c29a16 L |
3927 | if (htab->plt_second_eh_frame != NULL |
3928 | && htab->plt_second != NULL | |
3929 | && htab->plt_second->size != 0 | |
3930 | && !bfd_is_abs_section (htab->plt_second->output_section)) | |
3931 | htab->plt_second_eh_frame->size | |
38b12349 | 3932 | = htab->non_lazy_plt->eh_frame_plt_size; |
9a2a56cc AM |
3933 | } |
3934 | ||
c434dee6 AJ |
3935 | /* We now have determined the sizes of the various dynamic sections. |
3936 | Allocate memory for them. */ | |
b34976b6 | 3937 | relocs = FALSE; |
c434dee6 AJ |
3938 | for (s = dynobj->sections; s != NULL; s = s->next) |
3939 | { | |
3940 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3941 | continue; | |
3942 | ||
6de2ae4a L |
3943 | if (s == htab->elf.splt |
3944 | || s == htab->elf.sgot | |
3945 | || s == htab->elf.sgotplt | |
3946 | || s == htab->elf.iplt | |
3947 | || s == htab->elf.igotplt | |
f2c29a16 | 3948 | || s == htab->plt_second |
dd7e64d4 | 3949 | || s == htab->plt_got |
9a2a56cc | 3950 | || s == htab->plt_eh_frame |
fff53dae | 3951 | || s == htab->plt_got_eh_frame |
f2c29a16 | 3952 | || s == htab->plt_second_eh_frame |
5474d94f AM |
3953 | || s == htab->elf.sdynbss |
3954 | || s == htab->elf.sdynrelro) | |
c434dee6 AJ |
3955 | { |
3956 | /* Strip this section if we don't need it; see the | |
3957 | comment below. */ | |
3958 | } | |
0112cd26 | 3959 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 3960 | { |
6de2ae4a | 3961 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 3962 | relocs = TRUE; |
c434dee6 AJ |
3963 | |
3964 | /* We use the reloc_count field as a counter if we need | |
3965 | to copy relocs into the output file. */ | |
6de2ae4a | 3966 | if (s != htab->elf.srelplt) |
67a4f2b7 | 3967 | s->reloc_count = 0; |
70256ad8 | 3968 | } |
c434dee6 | 3969 | else |
70256ad8 AJ |
3970 | { |
3971 | /* It's not one of our sections, so don't allocate space. */ | |
3972 | continue; | |
3973 | } | |
3974 | ||
eea6121a | 3975 | if (s->size == 0) |
70256ad8 | 3976 | { |
c434dee6 AJ |
3977 | /* If we don't need this section, strip it from the |
3978 | output file. This is mostly to handle .rela.bss and | |
3979 | .rela.plt. We must create both sections in | |
3980 | create_dynamic_sections, because they must be created | |
3981 | before the linker maps input sections to output | |
3982 | sections. The linker does that before | |
3983 | adjust_dynamic_symbol is called, and it is that | |
3984 | function which decides whether anything needs to go | |
3985 | into these sections. */ | |
3986 | ||
8423293d | 3987 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
3988 | continue; |
3989 | } | |
3990 | ||
c456f082 AM |
3991 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3992 | continue; | |
3993 | ||
70256ad8 AJ |
3994 | /* Allocate memory for the section contents. We use bfd_zalloc |
3995 | here in case unused entries are not reclaimed before the | |
3996 | section's contents are written out. This should not happen, | |
3997 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
3998 | of garbage. */ | |
eea6121a | 3999 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 4000 | if (s->contents == NULL) |
b34976b6 | 4001 | return FALSE; |
70256ad8 AJ |
4002 | } |
4003 | ||
e41b3a13 | 4004 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
4005 | && htab->plt_eh_frame->contents != NULL) |
4006 | { | |
9a2a56cc | 4007 | memcpy (htab->plt_eh_frame->contents, |
38b12349 | 4008 | htab->plt.eh_frame_plt, htab->plt_eh_frame->size); |
9a2a56cc AM |
4009 | bfd_put_32 (dynobj, htab->elf.splt->size, |
4010 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
4011 | } | |
e41b3a13 | 4012 | |
fff53dae L |
4013 | if (htab->plt_got_eh_frame != NULL |
4014 | && htab->plt_got_eh_frame->contents != NULL) | |
4015 | { | |
fff53dae | 4016 | memcpy (htab->plt_got_eh_frame->contents, |
38b12349 | 4017 | htab->non_lazy_plt->eh_frame_plt, |
fff53dae L |
4018 | htab->plt_got_eh_frame->size); |
4019 | bfd_put_32 (dynobj, htab->plt_got->size, | |
4020 | (htab->plt_got_eh_frame->contents | |
4021 | + PLT_FDE_LEN_OFFSET)); | |
4022 | } | |
4023 | ||
f2c29a16 L |
4024 | if (htab->plt_second_eh_frame != NULL |
4025 | && htab->plt_second_eh_frame->contents != NULL) | |
8361ed4d | 4026 | { |
f2c29a16 | 4027 | memcpy (htab->plt_second_eh_frame->contents, |
38b12349 | 4028 | htab->non_lazy_plt->eh_frame_plt, |
f2c29a16 L |
4029 | htab->plt_second_eh_frame->size); |
4030 | bfd_put_32 (dynobj, htab->plt_second->size, | |
4031 | (htab->plt_second_eh_frame->contents | |
8361ed4d L |
4032 | + PLT_FDE_LEN_OFFSET)); |
4033 | } | |
4034 | ||
c434dee6 | 4035 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
4036 | { |
4037 | /* Add some entries to the .dynamic section. We fill in the | |
351f65ca | 4038 | values later, in elf_x86_64_finish_dynamic_sections, but we |
70256ad8 | 4039 | must add the entries now so that we get the correct size for |
407443a3 | 4040 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 4041 | dynamic linker and used by the debugger. */ |
dc810e39 | 4042 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 4043 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 4044 | |
0e1862bb | 4045 | if (bfd_link_executable (info)) |
70256ad8 | 4046 | { |
dc810e39 | 4047 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 4048 | return FALSE; |
70256ad8 AJ |
4049 | } |
4050 | ||
6de2ae4a | 4051 | if (htab->elf.splt->size != 0) |
70256ad8 | 4052 | { |
7c1e8d3e L |
4053 | /* DT_PLTGOT is used by prelink even if there is no PLT |
4054 | relocation. */ | |
4055 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
b34976b6 | 4056 | return FALSE; |
97d343d4 | 4057 | } |
67a4f2b7 | 4058 | |
97d343d4 L |
4059 | if (htab->elf.srelplt->size != 0) |
4060 | { | |
4061 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
4062 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
4063 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
67a4f2b7 | 4064 | return FALSE; |
70256ad8 AJ |
4065 | } |
4066 | ||
97d343d4 L |
4067 | if (htab->tlsdesc_plt |
4068 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
4069 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
4070 | return FALSE; | |
4071 | ||
70256ad8 AJ |
4072 | if (relocs) |
4073 | { | |
dc810e39 AM |
4074 | if (!add_dynamic_entry (DT_RELA, 0) |
4075 | || !add_dynamic_entry (DT_RELASZ, 0) | |
351f65ca | 4076 | || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela)) |
b34976b6 | 4077 | return FALSE; |
70256ad8 | 4078 | |
c434dee6 AJ |
4079 | /* If any dynamic relocs apply to a read-only section, |
4080 | then we need a DT_TEXTREL entry. */ | |
4081 | if ((info->flags & DF_TEXTREL) == 0) | |
eed180f8 | 4082 | elf_link_hash_traverse (&htab->elf, |
351f65ca | 4083 | elf_x86_64_readonly_dynrelocs, |
eb4ff4d6 | 4084 | info); |
c434dee6 AJ |
4085 | |
4086 | if ((info->flags & DF_TEXTREL) != 0) | |
4087 | { | |
2df3368d | 4088 | if (htab->readonly_dynrelocs_against_ifunc) |
8efa2874 L |
4089 | { |
4090 | info->callbacks->einfo | |
4091 | (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n")); | |
4092 | bfd_set_error (bfd_error_bad_value); | |
4093 | return FALSE; | |
4094 | } | |
4095 | ||
c434dee6 | 4096 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 4097 | return FALSE; |
c434dee6 | 4098 | } |
70256ad8 AJ |
4099 | } |
4100 | } | |
dc810e39 | 4101 | #undef add_dynamic_entry |
70256ad8 | 4102 | |
b34976b6 | 4103 | return TRUE; |
70256ad8 AJ |
4104 | } |
4105 | ||
67a4f2b7 | 4106 | static bfd_boolean |
351f65ca L |
4107 | elf_x86_64_always_size_sections (bfd *output_bfd, |
4108 | struct bfd_link_info *info) | |
67a4f2b7 AO |
4109 | { |
4110 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
4111 | ||
4112 | if (tls_sec) | |
4113 | { | |
4114 | struct elf_link_hash_entry *tlsbase; | |
4115 | ||
4116 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
4117 | "_TLS_MODULE_BASE_", | |
4118 | FALSE, FALSE, FALSE); | |
4119 | ||
4120 | if (tlsbase && tlsbase->type == STT_TLS) | |
4121 | { | |
351f65ca | 4122 | struct elf_x86_64_link_hash_table *htab; |
67a4f2b7 AO |
4123 | struct bfd_link_hash_entry *bh = NULL; |
4124 | const struct elf_backend_data *bed | |
4125 | = get_elf_backend_data (output_bfd); | |
4126 | ||
351f65ca | 4127 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4128 | if (htab == NULL) |
4129 | return FALSE; | |
4130 | ||
67a4f2b7 AO |
4131 | if (!(_bfd_generic_link_add_one_symbol |
4132 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
4133 | tls_sec, 0, NULL, FALSE, | |
4134 | bed->collect, &bh))) | |
4135 | return FALSE; | |
9f03412a | 4136 | |
4dfe6ac6 | 4137 | htab->tls_module_base = bh; |
9f03412a | 4138 | |
67a4f2b7 AO |
4139 | tlsbase = (struct elf_link_hash_entry *)bh; |
4140 | tlsbase->def_regular = 1; | |
4141 | tlsbase->other = STV_HIDDEN; | |
576fa883 | 4142 | tlsbase->root.linker_def = 1; |
67a4f2b7 AO |
4143 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
4144 | } | |
4145 | } | |
4146 | ||
4147 | return TRUE; | |
4148 | } | |
4149 | ||
9f03412a AO |
4150 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
4151 | executables. Rather than setting it to the beginning of the TLS | |
4152 | section, we have to set it to the end. This function may be called | |
4153 | multiple times, it is idempotent. */ | |
4154 | ||
4155 | static void | |
351f65ca | 4156 | elf_x86_64_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 4157 | { |
351f65ca | 4158 | struct elf_x86_64_link_hash_table *htab; |
9f03412a AO |
4159 | struct bfd_link_hash_entry *base; |
4160 | ||
0e1862bb | 4161 | if (!bfd_link_executable (info)) |
9f03412a AO |
4162 | return; |
4163 | ||
351f65ca | 4164 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4165 | if (htab == NULL) |
4166 | return; | |
9f03412a | 4167 | |
4dfe6ac6 NC |
4168 | base = htab->tls_module_base; |
4169 | if (base == NULL) | |
9f03412a AO |
4170 | return; |
4171 | ||
4dfe6ac6 | 4172 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
4173 | } |
4174 | ||
bffbf940 JJ |
4175 | /* Return the base VMA address which should be subtracted from real addresses |
4176 | when resolving @dtpoff relocation. | |
4177 | This is PT_TLS segment p_vaddr. */ | |
4178 | ||
4179 | static bfd_vma | |
351f65ca | 4180 | elf_x86_64_dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 4181 | { |
e1918d23 AM |
4182 | /* If tls_sec is NULL, we should have signalled an error already. */ |
4183 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 4184 | return 0; |
e1918d23 | 4185 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
4186 | } |
4187 | ||
4188 | /* Return the relocation value for @tpoff relocation | |
4189 | if STT_TLS virtual address is ADDRESS. */ | |
4190 | ||
4191 | static bfd_vma | |
351f65ca | 4192 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 4193 | { |
e1918d23 | 4194 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
4195 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
4196 | bfd_vma static_tls_size; | |
bffbf940 JJ |
4197 | |
4198 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 4199 | if (htab->tls_sec == NULL) |
bffbf940 | 4200 | return 0; |
7dc98aea RO |
4201 | |
4202 | /* Consider special static TLS alignment requirements. */ | |
4203 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
4204 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
4205 | } |
4206 | ||
90f487df L |
4207 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
4208 | branch? */ | |
4209 | ||
4210 | static bfd_boolean | |
4211 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
4212 | { | |
4213 | /* Opcode Instruction | |
4214 | 0xe8 call | |
4215 | 0xe9 jump | |
4216 | 0x0f 0x8x conditional jump */ | |
4217 | return ((offset > 0 | |
4218 | && (contents [offset - 1] == 0xe8 | |
4219 | || contents [offset - 1] == 0xe9)) | |
4220 | || (offset > 1 | |
4221 | && contents [offset - 2] == 0x0f | |
4222 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
4223 | } | |
4224 | ||
8d88c4ca NC |
4225 | /* Relocate an x86_64 ELF section. */ |
4226 | ||
b34976b6 | 4227 | static bfd_boolean |
351f65ca L |
4228 | elf_x86_64_relocate_section (bfd *output_bfd, |
4229 | struct bfd_link_info *info, | |
4230 | bfd *input_bfd, | |
4231 | asection *input_section, | |
4232 | bfd_byte *contents, | |
4233 | Elf_Internal_Rela *relocs, | |
4234 | Elf_Internal_Sym *local_syms, | |
4235 | asection **local_sections) | |
8d88c4ca | 4236 | { |
351f65ca | 4237 | struct elf_x86_64_link_hash_table *htab; |
8d88c4ca NC |
4238 | Elf_Internal_Shdr *symtab_hdr; |
4239 | struct elf_link_hash_entry **sym_hashes; | |
4240 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 4241 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 4242 | Elf_Internal_Rela *rel; |
60f2e42e | 4243 | Elf_Internal_Rela *wrel; |
8d88c4ca | 4244 | Elf_Internal_Rela *relend; |
38b12349 | 4245 | unsigned int plt_entry_size; |
8d88c4ca | 4246 | |
0ffa91dd NC |
4247 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
4248 | ||
338c190a L |
4249 | /* Skip if check_relocs failed. */ |
4250 | if (input_section->check_relocs_failed) | |
4251 | return FALSE; | |
4252 | ||
351f65ca | 4253 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4254 | if (htab == NULL) |
4255 | return FALSE; | |
38b12349 | 4256 | plt_entry_size = htab->plt.plt_entry_size; |
0ffa91dd | 4257 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
4258 | sym_hashes = elf_sym_hashes (input_bfd); |
4259 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
351f65ca | 4260 | local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 4261 | |
351f65ca | 4262 | elf_x86_64_set_tls_module_base (info); |
9f03412a | 4263 | |
60f2e42e | 4264 | rel = wrel = relocs; |
8d88c4ca | 4265 | relend = relocs + input_section->reloc_count; |
60f2e42e | 4266 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 4267 | { |
bffbf940 | 4268 | unsigned int r_type; |
8d88c4ca NC |
4269 | reloc_howto_type *howto; |
4270 | unsigned long r_symndx; | |
4271 | struct elf_link_hash_entry *h; | |
0ff2b86e | 4272 | struct elf_x86_64_link_hash_entry *eh; |
8d88c4ca NC |
4273 | Elf_Internal_Sym *sym; |
4274 | asection *sec; | |
0ff2b86e | 4275 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 4276 | bfd_vma relocation; |
b34976b6 | 4277 | bfd_boolean unresolved_reloc; |
8d88c4ca | 4278 | bfd_reloc_status_type r; |
bffbf940 | 4279 | int tls_type; |
0ff2b86e | 4280 | asection *base_got, *resolved_plt; |
1788fc08 | 4281 | bfd_vma st_size; |
aec6b87e | 4282 | bfd_boolean resolved_to_zero; |
9e9821dd | 4283 | bfd_boolean relative_reloc; |
8d88c4ca | 4284 | |
351f65ca | 4285 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
4286 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
4287 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
4288 | { |
4289 | if (wrel != rel) | |
4290 | *wrel = *rel; | |
4291 | continue; | |
4292 | } | |
8d88c4ca | 4293 | |
9911c0fc | 4294 | if (r_type >= (int) R_X86_64_standard) |
47aeb64c | 4295 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
8d88c4ca | 4296 | |
d7921315 | 4297 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 4298 | || ABI_64_P (output_bfd)) |
d7921315 L |
4299 | howto = x86_64_elf_howto_table + r_type; |
4300 | else | |
4301 | howto = (x86_64_elf_howto_table | |
4302 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 4303 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
4304 | h = NULL; |
4305 | sym = NULL; | |
4306 | sec = NULL; | |
b34976b6 | 4307 | unresolved_reloc = FALSE; |
8d88c4ca | 4308 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
4309 | { |
4310 | sym = local_syms + r_symndx; | |
4311 | sec = local_sections[r_symndx]; | |
c434dee6 | 4312 | |
c25bc9fc L |
4313 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
4314 | &sec, rel); | |
1788fc08 | 4315 | st_size = sym->st_size; |
c25bc9fc L |
4316 | |
4317 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 4318 | if (!bfd_link_relocatable (info) |
351f65ca | 4319 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 4320 | { |
351f65ca L |
4321 | h = elf_x86_64_get_local_sym_hash (htab, input_bfd, |
4322 | rel, FALSE); | |
c25bc9fc L |
4323 | if (h == NULL) |
4324 | abort (); | |
4325 | ||
eed180f8 | 4326 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
4327 | h->root.u.def.value = sym->st_value; |
4328 | h->root.u.def.section = sec; | |
4329 | } | |
8da6118f | 4330 | } |
8d88c4ca | 4331 | else |
8da6118f | 4332 | { |
c9736ba0 | 4333 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 4334 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
c434dee6 | 4335 | |
b2a8e766 AM |
4336 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
4337 | r_symndx, symtab_hdr, sym_hashes, | |
4338 | h, sec, relocation, | |
62d887d4 | 4339 | unresolved_reloc, warned, ignored); |
1788fc08 | 4340 | st_size = h->size; |
8da6118f | 4341 | } |
ab96bf03 | 4342 | |
dbaa2011 | 4343 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
4344 | { |
4345 | _bfd_clear_contents (howto, input_bfd, input_section, | |
4346 | contents + rel->r_offset); | |
4347 | wrel->r_offset = rel->r_offset; | |
4348 | wrel->r_info = 0; | |
4349 | wrel->r_addend = 0; | |
4350 | ||
4351 | /* For ld -r, remove relocations in debug sections against | |
4352 | sections defined in discarded sections. Not done for | |
4353 | eh_frame editing code expects to be present. */ | |
4354 | if (bfd_link_relocatable (info) | |
4355 | && (input_section->flags & SEC_DEBUGGING)) | |
4356 | wrel--; | |
4357 | ||
4358 | continue; | |
4359 | } | |
ab96bf03 | 4360 | |
0e1862bb | 4361 | if (bfd_link_relocatable (info)) |
2d5da473 L |
4362 | { |
4363 | if (wrel != rel) | |
4364 | *wrel = *rel; | |
4365 | continue; | |
4366 | } | |
ab96bf03 | 4367 | |
1788fc08 | 4368 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 4369 | { |
1788fc08 L |
4370 | if (r_type == R_X86_64_64) |
4371 | { | |
4372 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
4373 | zero-extend it to 64bit if addend is zero. */ | |
4374 | r_type = R_X86_64_32; | |
4375 | memset (contents + rel->r_offset + 4, 0, 4); | |
4376 | } | |
4377 | else if (r_type == R_X86_64_SIZE64) | |
4378 | { | |
4379 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
4380 | zero-extend it to 64bit if addend is zero. */ | |
4381 | r_type = R_X86_64_SIZE32; | |
4382 | memset (contents + rel->r_offset + 4, 0, 4); | |
4383 | } | |
64d25c44 L |
4384 | } |
4385 | ||
0ff2b86e L |
4386 | eh = (struct elf_x86_64_link_hash_entry *) h; |
4387 | ||
cbe950e9 L |
4388 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
4389 | it here if it is defined in a non-shared object. */ | |
4390 | if (h != NULL | |
4391 | && h->type == STT_GNU_IFUNC | |
4392 | && h->def_regular) | |
4393 | { | |
cbe950e9 | 4394 | bfd_vma plt_index; |
4c544807 | 4395 | const char *name; |
cbe950e9 | 4396 | |
97dc35c8 L |
4397 | if ((input_section->flags & SEC_ALLOC) == 0) |
4398 | { | |
4399 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
4400 | sections because such sections are not SEC_ALLOC and | |
4401 | thus ld.so will not process them. */ | |
4402 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 4403 | continue; |
97dc35c8 L |
4404 | abort (); |
4405 | } | |
233cc9c1 L |
4406 | |
4407 | switch (r_type) | |
4408 | { | |
4409 | default: | |
4410 | break; | |
4411 | ||
4412 | case R_X86_64_GOTPCREL: | |
4413 | case R_X86_64_GOTPCRELX: | |
4414 | case R_X86_64_REX_GOTPCRELX: | |
4415 | case R_X86_64_GOTPCREL64: | |
4416 | base_got = htab->elf.sgot; | |
4417 | off = h->got.offset; | |
4418 | ||
4419 | if (base_got == NULL) | |
4420 | abort (); | |
4421 | ||
4422 | if (off == (bfd_vma) -1) | |
4423 | { | |
4424 | /* We can't use h->got.offset here to save state, or | |
4425 | even just remember the offset, as finish_dynamic_symbol | |
4426 | would use that as offset into .got. */ | |
4427 | ||
4428 | if (h->plt.offset == (bfd_vma) -1) | |
4429 | abort (); | |
4430 | ||
4431 | if (htab->elf.splt != NULL) | |
4432 | { | |
38b12349 L |
4433 | plt_index = (h->plt.offset / plt_entry_size |
4434 | - htab->plt.has_plt0); | |
233cc9c1 L |
4435 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
4436 | base_got = htab->elf.sgotplt; | |
4437 | } | |
4438 | else | |
4439 | { | |
4440 | plt_index = h->plt.offset / plt_entry_size; | |
4441 | off = plt_index * GOT_ENTRY_SIZE; | |
4442 | base_got = htab->elf.igotplt; | |
4443 | } | |
4444 | ||
4445 | if (h->dynindx == -1 | |
4446 | || h->forced_local | |
4447 | || info->symbolic) | |
4448 | { | |
4449 | /* This references the local defitionion. We must | |
4450 | initialize this entry in the global offset table. | |
4451 | Since the offset must always be a multiple of 8, | |
4452 | we use the least significant bit to record | |
4453 | whether we have initialized it already. | |
4454 | ||
4455 | When doing a dynamic link, we create a .rela.got | |
4456 | relocation entry to initialize the value. This | |
4457 | is done in the finish_dynamic_symbol routine. */ | |
4458 | if ((off & 1) != 0) | |
4459 | off &= ~1; | |
4460 | else | |
4461 | { | |
4462 | bfd_put_64 (output_bfd, relocation, | |
4463 | base_got->contents + off); | |
4464 | /* Note that this is harmless for the GOTPLT64 | |
4465 | case, as -1 | 1 still is -1. */ | |
4466 | h->got.offset |= 1; | |
4467 | } | |
4468 | } | |
4469 | } | |
4470 | ||
4471 | relocation = (base_got->output_section->vma | |
4472 | + base_got->output_offset + off); | |
4473 | ||
4474 | goto do_relocation; | |
4475 | } | |
4476 | ||
4477 | if (h->plt.offset == (bfd_vma) -1) | |
4478 | { | |
4479 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
4480 | if (r_type == htab->pointer_r_type | |
4481 | && (input_section->flags & SEC_CODE) == 0) | |
4482 | goto do_ifunc_pointer; | |
4483 | goto bad_ifunc_reloc; | |
4484 | } | |
cbe950e9 L |
4485 | |
4486 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
4487 | if (htab->elf.splt != NULL) |
4488 | { | |
f2c29a16 | 4489 | if (htab->plt_second != NULL) |
0ff2b86e | 4490 | { |
f2c29a16 L |
4491 | resolved_plt = htab->plt_second; |
4492 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
4493 | } |
4494 | else | |
4495 | { | |
4496 | resolved_plt = htab->elf.splt; | |
4497 | plt_offset = h->plt.offset; | |
4498 | } | |
4499 | } | |
4500 | else | |
4501 | { | |
4502 | resolved_plt = htab->elf.iplt; | |
4503 | plt_offset = h->plt.offset; | |
4504 | } | |
4505 | ||
4506 | relocation = (resolved_plt->output_section->vma | |
4507 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
4508 | |
4509 | switch (r_type) | |
4510 | { | |
4511 | default: | |
233cc9c1 | 4512 | bad_ifunc_reloc: |
4c544807 L |
4513 | if (h->root.root.string) |
4514 | name = h->root.root.string; | |
4515 | else | |
4516 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
4517 | NULL); | |
4eca0228 | 4518 | _bfd_error_handler |
695344c0 | 4519 | /* xgettext:c-format */ |
cbe950e9 | 4520 | (_("%B: relocation %s against STT_GNU_IFUNC " |
233cc9c1 L |
4521 | "symbol `%s' isn't supported"), input_bfd, |
4522 | howto->name, name); | |
cbe950e9 L |
4523 | bfd_set_error (bfd_error_bad_value); |
4524 | return FALSE; | |
4525 | ||
4526 | case R_X86_64_32S: | |
0e1862bb | 4527 | if (bfd_link_pic (info)) |
cbe950e9 | 4528 | abort (); |
710ab287 L |
4529 | goto do_relocation; |
4530 | ||
248775ba L |
4531 | case R_X86_64_32: |
4532 | if (ABI_64_P (output_bfd)) | |
4533 | goto do_relocation; | |
17672001 | 4534 | /* FALLTHROUGH */ |
eed180f8 | 4535 | case R_X86_64_64: |
233cc9c1 | 4536 | do_ifunc_pointer: |
710ab287 L |
4537 | if (rel->r_addend != 0) |
4538 | { | |
4c544807 L |
4539 | if (h->root.root.string) |
4540 | name = h->root.root.string; | |
4541 | else | |
4542 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
4543 | sym, NULL); | |
4eca0228 | 4544 | _bfd_error_handler |
695344c0 | 4545 | /* xgettext:c-format */ |
710ab287 | 4546 | (_("%B: relocation %s against STT_GNU_IFUNC " |
d42c267e | 4547 | "symbol `%s' has non-zero addend: %Ld"), |
ef77d6af | 4548 | input_bfd, howto->name, name, rel->r_addend); |
710ab287 L |
4549 | bfd_set_error (bfd_error_bad_value); |
4550 | return FALSE; | |
4551 | } | |
4552 | ||
4553 | /* Generate dynamic relcoation only when there is a | |
233cc9c1 L |
4554 | non-GOT reference in a shared object or there is no |
4555 | PLT. */ | |
4556 | if ((bfd_link_pic (info) && h->non_got_ref) | |
4557 | || h->plt.offset == (bfd_vma) -1) | |
710ab287 L |
4558 | { |
4559 | Elf_Internal_Rela outrel; | |
710ab287 L |
4560 | asection *sreloc; |
4561 | ||
c25bc9fc L |
4562 | /* Need a dynamic relocation to get the real function |
4563 | address. */ | |
710ab287 L |
4564 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
4565 | info, | |
4566 | input_section, | |
4567 | rel->r_offset); | |
4568 | if (outrel.r_offset == (bfd_vma) -1 | |
4569 | || outrel.r_offset == (bfd_vma) -2) | |
4570 | abort (); | |
4571 | ||
4572 | outrel.r_offset += (input_section->output_section->vma | |
4573 | + input_section->output_offset); | |
4574 | ||
4575 | if (h->dynindx == -1 | |
44c4ea11 | 4576 | || h->forced_local |
0e1862bb | 4577 | || bfd_link_executable (info)) |
710ab287 | 4578 | { |
6322e5c5 L |
4579 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
4580 | h->root.root.string, | |
4581 | h->root.u.def.section->owner); | |
4582 | ||
710ab287 | 4583 | /* This symbol is resolved locally. */ |
56b8aada L |
4584 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
4585 | outrel.r_addend = (h->root.u.def.value | |
4586 | + h->root.u.def.section->output_section->vma | |
4587 | + h->root.u.def.section->output_offset); | |
710ab287 L |
4588 | } |
4589 | else | |
4590 | { | |
351f65ca | 4591 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
4592 | outrel.r_addend = 0; |
4593 | } | |
4594 | ||
233cc9c1 L |
4595 | /* Dynamic relocations are stored in |
4596 | 1. .rela.ifunc section in PIC object. | |
4597 | 2. .rela.got section in dynamic executable. | |
4598 | 3. .rela.iplt section in static executable. */ | |
4599 | if (bfd_link_pic (info)) | |
4600 | sreloc = htab->elf.irelifunc; | |
4601 | else if (htab->elf.splt != NULL) | |
4602 | sreloc = htab->elf.srelgot; | |
4603 | else | |
4604 | sreloc = htab->elf.irelplt; | |
351f65ca | 4605 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
4606 | |
4607 | /* If this reloc is against an external symbol, we | |
4608 | do not want to fiddle with the addend. Otherwise, | |
4609 | we need to include the symbol value so that it | |
4610 | becomes an addend for the dynamic reloc. For an | |
4611 | internal symbol, we have updated addend. */ | |
56b8aada | 4612 | continue; |
710ab287 | 4613 | } |
17672001 | 4614 | /* FALLTHROUGH */ |
cbe950e9 | 4615 | case R_X86_64_PC32: |
c3320543 | 4616 | case R_X86_64_PC32_BND: |
cbe950e9 L |
4617 | case R_X86_64_PC64: |
4618 | case R_X86_64_PLT32: | |
c3320543 | 4619 | case R_X86_64_PLT32_BND: |
cbe950e9 | 4620 | goto do_relocation; |
cbe950e9 L |
4621 | } |
4622 | } | |
4623 | ||
aec6b87e | 4624 | resolved_to_zero = (eh != NULL |
e62b9723 L |
4625 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
4626 | eh->has_got_reloc, | |
4627 | eh)); | |
aec6b87e | 4628 | |
70256ad8 AJ |
4629 | /* When generating a shared object, the relocations handled here are |
4630 | copied into the output file to be resolved at run time. */ | |
4631 | switch (r_type) | |
4632 | { | |
4633 | case R_X86_64_GOT32: | |
7b81dfbb | 4634 | case R_X86_64_GOT64: |
70256ad8 AJ |
4635 | /* Relocation is to the entry for this symbol in the global |
4636 | offset table. */ | |
70256ad8 | 4637 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
4638 | case R_X86_64_GOTPCRELX: |
4639 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
4640 | case R_X86_64_GOTPCREL64: |
4641 | /* Use global offset table entry as symbol value. */ | |
4642 | case R_X86_64_GOTPLT64: | |
de194d85 | 4643 | /* This is obsolete and treated the same as GOT64. */ |
6de2ae4a | 4644 | base_got = htab->elf.sgot; |
7b81dfbb | 4645 | |
6de2ae4a | 4646 | if (htab->elf.sgot == NULL) |
c434dee6 | 4647 | abort (); |
053579d7 | 4648 | |
9e9821dd | 4649 | relative_reloc = FALSE; |
51e0a107 | 4650 | if (h != NULL) |
70256ad8 | 4651 | { |
b34976b6 | 4652 | bfd_boolean dyn; |
c434dee6 AJ |
4653 | |
4654 | off = h->got.offset; | |
7b81dfbb | 4655 | if (h->needs_plt |
eed180f8 | 4656 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
4657 | && off == (bfd_vma)-1) |
4658 | { | |
4659 | /* We can't use h->got.offset here to save | |
4660 | state, or even just remember the offset, as | |
4661 | finish_dynamic_symbol would use that as offset into | |
4662 | .got. */ | |
38b12349 L |
4663 | bfd_vma plt_index = (h->plt.offset / plt_entry_size |
4664 | - htab->plt.has_plt0); | |
7b81dfbb | 4665 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 4666 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
4667 | } |
4668 | ||
c434dee6 | 4669 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 4670 | |
0e1862bb L |
4671 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
4672 | || (bfd_link_pic (info) | |
27482721 | 4673 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
4674 | || (ELF_ST_VISIBILITY (h->other) |
4675 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
4676 | { |
4677 | /* This is actually a static link, or it is a -Bsymbolic | |
4678 | link and the symbol is defined locally, or the symbol | |
407443a3 | 4679 | was forced to be local because of a version file. We |
51e0a107 JH |
4680 | must initialize this entry in the global offset table. |
4681 | Since the offset must always be a multiple of 8, we | |
4682 | use the least significant bit to record whether we | |
4683 | have initialized it already. | |
4684 | ||
4685 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
4686 | relocation entry to initialize the value. This is |
4687 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
4688 | if ((off & 1) != 0) |
4689 | off &= ~1; | |
4690 | else | |
4691 | { | |
4692 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
4693 | base_got->contents + off); |
4694 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 4695 | as -1 | 1 still is -1. */ |
51e0a107 | 4696 | h->got.offset |= 1; |
9e9821dd L |
4697 | |
4698 | if (h->dynindx == -1 | |
4699 | && !h->forced_local | |
4700 | && h->root.type != bfd_link_hash_undefweak | |
4701 | && bfd_link_pic (info)) | |
4702 | { | |
4703 | /* If this symbol isn't dynamic in PIC, | |
4704 | generate R_X86_64_RELATIVE here. */ | |
4705 | eh->no_finish_dynamic_symbol = 1; | |
4706 | relative_reloc = TRUE; | |
4707 | } | |
51e0a107 JH |
4708 | } |
4709 | } | |
053579d7 | 4710 | else |
b34976b6 | 4711 | unresolved_reloc = FALSE; |
70256ad8 | 4712 | } |
51e0a107 JH |
4713 | else |
4714 | { | |
c434dee6 AJ |
4715 | if (local_got_offsets == NULL) |
4716 | abort (); | |
51e0a107 JH |
4717 | |
4718 | off = local_got_offsets[r_symndx]; | |
4719 | ||
4720 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
4721 | the least significant bit to record whether we have |
4722 | already generated the necessary reloc. */ | |
51e0a107 JH |
4723 | if ((off & 1) != 0) |
4724 | off &= ~1; | |
4725 | else | |
4726 | { | |
c434dee6 | 4727 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 4728 | base_got->contents + off); |
9e9821dd | 4729 | local_got_offsets[r_symndx] |= 1; |
51e0a107 | 4730 | |
0e1862bb | 4731 | if (bfd_link_pic (info)) |
9e9821dd | 4732 | relative_reloc = TRUE; |
51e0a107 | 4733 | } |
51e0a107 | 4734 | } |
6a2bda3f | 4735 | |
9e9821dd L |
4736 | if (relative_reloc) |
4737 | { | |
4738 | asection *s; | |
4739 | Elf_Internal_Rela outrel; | |
4740 | ||
4741 | /* We need to generate a R_X86_64_RELATIVE reloc | |
4742 | for the dynamic linker. */ | |
4743 | s = htab->elf.srelgot; | |
4744 | if (s == NULL) | |
4745 | abort (); | |
4746 | ||
4747 | outrel.r_offset = (base_got->output_section->vma | |
4748 | + base_got->output_offset | |
4749 | + off); | |
4750 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); | |
4751 | outrel.r_addend = relocation; | |
4752 | elf_append_rela (output_bfd, s, &outrel); | |
4753 | } | |
4754 | ||
c434dee6 AJ |
4755 | if (off >= (bfd_vma) -2) |
4756 | abort (); | |
4757 | ||
7b81dfbb AJ |
4758 | relocation = base_got->output_section->vma |
4759 | + base_got->output_offset + off; | |
56ceb5b5 L |
4760 | if (r_type != R_X86_64_GOTPCREL |
4761 | && r_type != R_X86_64_GOTPCRELX | |
4762 | && r_type != R_X86_64_REX_GOTPCRELX | |
4763 | && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
4764 | relocation -= htab->elf.sgotplt->output_section->vma |
4765 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 4766 | |
70256ad8 AJ |
4767 | break; |
4768 | ||
d6ab8113 JB |
4769 | case R_X86_64_GOTOFF64: |
4770 | /* Relocation is relative to the start of the global offset | |
4771 | table. */ | |
4772 | ||
3d949995 L |
4773 | /* Check to make sure it isn't a protected function or data |
4774 | symbol for shared library since it may not be local when | |
e3c0e327 L |
4775 | used as function address or with copy relocation. We also |
4776 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 4777 | if (bfd_link_pic (info) && h) |
d6ab8113 | 4778 | { |
e3c0e327 L |
4779 | if (!h->def_regular) |
4780 | { | |
4781 | const char *v; | |
4782 | ||
4783 | switch (ELF_ST_VISIBILITY (h->other)) | |
4784 | { | |
4785 | case STV_HIDDEN: | |
4786 | v = _("hidden symbol"); | |
4787 | break; | |
4788 | case STV_INTERNAL: | |
4789 | v = _("internal symbol"); | |
4790 | break; | |
4791 | case STV_PROTECTED: | |
4792 | v = _("protected symbol"); | |
4793 | break; | |
4794 | default: | |
4795 | v = _("symbol"); | |
4796 | break; | |
4797 | } | |
4798 | ||
4eca0228 | 4799 | _bfd_error_handler |
695344c0 | 4800 | /* xgettext:c-format */ |
63a5468a AM |
4801 | (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s" |
4802 | " `%s' can not be used when making a shared object"), | |
e3c0e327 L |
4803 | input_bfd, v, h->root.root.string); |
4804 | bfd_set_error (bfd_error_bad_value); | |
4805 | return FALSE; | |
4806 | } | |
0e1862bb | 4807 | else if (!bfd_link_executable (info) |
e3c0e327 L |
4808 | && !SYMBOL_REFERENCES_LOCAL (info, h) |
4809 | && (h->type == STT_FUNC | |
4810 | || h->type == STT_OBJECT) | |
4811 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
4812 | { | |
4eca0228 | 4813 | _bfd_error_handler |
695344c0 | 4814 | /* xgettext:c-format */ |
63a5468a AM |
4815 | (_("%B: relocation R_X86_64_GOTOFF64 against protected %s" |
4816 | " `%s' can not be used when making a shared object"), | |
e3c0e327 L |
4817 | input_bfd, |
4818 | h->type == STT_FUNC ? "function" : "data", | |
4819 | h->root.root.string); | |
4820 | bfd_set_error (bfd_error_bad_value); | |
d6ab8113 | 4821 | return FALSE; |
e3c0e327 | 4822 | } |
d6ab8113 JB |
4823 | } |
4824 | ||
4825 | /* Note that sgot is not involved in this | |
4826 | calculation. We always want the start of .got.plt. If we | |
4827 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
4828 | permitted by the ABI, we might have to change this | |
4829 | calculation. */ | |
6de2ae4a L |
4830 | relocation -= htab->elf.sgotplt->output_section->vma |
4831 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4832 | break; |
4833 | ||
4834 | case R_X86_64_GOTPC32: | |
7b81dfbb | 4835 | case R_X86_64_GOTPC64: |
d6ab8113 | 4836 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
4837 | relocation = htab->elf.sgotplt->output_section->vma |
4838 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4839 | unresolved_reloc = FALSE; |
4840 | break; | |
7b81dfbb AJ |
4841 | |
4842 | case R_X86_64_PLTOFF64: | |
4843 | /* Relocation is PLT entry relative to GOT. For local | |
4844 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 4845 | if (h != NULL |
7b81dfbb | 4846 | /* See PLT32 handling. */ |
9d734efa L |
4847 | && (h->plt.offset != (bfd_vma) -1 |
4848 | || eh->plt_got.offset != (bfd_vma) -1) | |
6de2ae4a | 4849 | && htab->elf.splt != NULL) |
7b81dfbb | 4850 | { |
9d734efa L |
4851 | if (eh->plt_got.offset != (bfd_vma) -1) |
4852 | { | |
4853 | /* Use the GOT PLT. */ | |
4854 | resolved_plt = htab->plt_got; | |
4855 | plt_offset = eh->plt_got.offset; | |
4856 | } | |
f2c29a16 | 4857 | else if (htab->plt_second != NULL) |
0ff2b86e | 4858 | { |
f2c29a16 L |
4859 | resolved_plt = htab->plt_second; |
4860 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
4861 | } |
4862 | else | |
4863 | { | |
4864 | resolved_plt = htab->elf.splt; | |
4865 | plt_offset = h->plt.offset; | |
4866 | } | |
4867 | ||
4868 | relocation = (resolved_plt->output_section->vma | |
4869 | + resolved_plt->output_offset | |
4870 | + plt_offset); | |
7b81dfbb AJ |
4871 | unresolved_reloc = FALSE; |
4872 | } | |
4873 | ||
6de2ae4a L |
4874 | relocation -= htab->elf.sgotplt->output_section->vma |
4875 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 4876 | break; |
d6ab8113 | 4877 | |
70256ad8 | 4878 | case R_X86_64_PLT32: |
c3320543 | 4879 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
4880 | /* Relocation is to the entry for this symbol in the |
4881 | procedure linkage table. */ | |
4882 | ||
4883 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 4884 | without using the procedure linkage table. */ |
70256ad8 AJ |
4885 | if (h == NULL) |
4886 | break; | |
4887 | ||
dd7e64d4 L |
4888 | if ((h->plt.offset == (bfd_vma) -1 |
4889 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 4890 | || htab->elf.splt == NULL) |
70256ad8 AJ |
4891 | { |
4892 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
4893 | happens when statically linking PIC code, or when |
4894 | using -Bsymbolic. */ | |
70256ad8 AJ |
4895 | break; |
4896 | } | |
4897 | ||
dd7e64d4 | 4898 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 4899 | { |
f2c29a16 | 4900 | if (htab->plt_second != NULL) |
dd7e64d4 | 4901 | { |
f2c29a16 L |
4902 | resolved_plt = htab->plt_second; |
4903 | plt_offset = eh->plt_second.offset; | |
dd7e64d4 L |
4904 | } |
4905 | else | |
4906 | { | |
4907 | resolved_plt = htab->elf.splt; | |
4908 | plt_offset = h->plt.offset; | |
4909 | } | |
0ff2b86e L |
4910 | } |
4911 | else | |
4912 | { | |
dd7e64d4 L |
4913 | /* Use the GOT PLT. */ |
4914 | resolved_plt = htab->plt_got; | |
4915 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
4916 | } |
4917 | ||
4918 | relocation = (resolved_plt->output_section->vma | |
4919 | + resolved_plt->output_offset | |
4920 | + plt_offset); | |
b34976b6 | 4921 | unresolved_reloc = FALSE; |
70256ad8 AJ |
4922 | break; |
4923 | ||
1788fc08 L |
4924 | case R_X86_64_SIZE32: |
4925 | case R_X86_64_SIZE64: | |
1788fc08 L |
4926 | /* Set to symbol size. */ |
4927 | relocation = st_size; | |
4928 | goto direct; | |
4929 | ||
fd8ab9e5 AJ |
4930 | case R_X86_64_PC8: |
4931 | case R_X86_64_PC16: | |
4932 | case R_X86_64_PC32: | |
c3320543 | 4933 | case R_X86_64_PC32_BND: |
6333bc0d | 4934 | /* Don't complain about -fPIC if the symbol is undefined when |
aec6b87e L |
4935 | building executable unless it is unresolved weak symbol. */ |
4936 | if ((input_section->flags & SEC_ALLOC) != 0 | |
90f487df | 4937 | && (input_section->flags & SEC_READONLY) != 0 |
6333bc0d | 4938 | && h != NULL |
aec6b87e | 4939 | && ((bfd_link_executable (info) |
dd57c19c L |
4940 | && h->root.type == bfd_link_hash_undefweak |
4941 | && !resolved_to_zero) | |
c5bb8910 | 4942 | || bfd_link_dll (info))) |
6610a52d | 4943 | { |
41bed6dd L |
4944 | bfd_boolean fail = FALSE; |
4945 | bfd_boolean branch | |
c3320543 L |
4946 | = ((r_type == R_X86_64_PC32 |
4947 | || r_type == R_X86_64_PC32_BND) | |
41bed6dd L |
4948 | && is_32bit_relative_branch (contents, rel->r_offset)); |
4949 | ||
4950 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
4951 | { | |
4952 | /* Symbol is referenced locally. Make sure it is | |
4953 | defined locally or for a branch. */ | |
8170f769 L |
4954 | fail = (!(h->def_regular || ELF_COMMON_DEF_P (h)) |
4955 | && !branch); | |
41bed6dd | 4956 | } |
aec6b87e | 4957 | else if (!(bfd_link_pie (info) |
bc696fd5 | 4958 | && (h->needs_copy || eh->needs_copy))) |
41bed6dd | 4959 | { |
9a926d55 L |
4960 | /* Symbol doesn't need copy reloc and isn't referenced |
4961 | locally. We only allow branch to symbol with | |
4962 | non-default visibility. */ | |
41bed6dd L |
4963 | fail = (!branch |
4964 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
4965 | } | |
4966 | ||
4967 | if (fail) | |
338c190a L |
4968 | return elf_x86_64_need_pic (input_bfd, input_section, |
4969 | h, NULL, NULL, howto); | |
6610a52d L |
4970 | } |
4971 | /* Fall through. */ | |
4972 | ||
70256ad8 AJ |
4973 | case R_X86_64_8: |
4974 | case R_X86_64_16: | |
4975 | case R_X86_64_32: | |
d6ab8113 | 4976 | case R_X86_64_PC64: |
6b3db546 | 4977 | case R_X86_64_64: |
80643fbc | 4978 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 4979 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 4980 | |
1788fc08 | 4981 | direct: |
b1e24c02 | 4982 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
4983 | break; |
4984 | ||
9a926d55 | 4985 | /* Don't copy a pc-relative relocation into the output file |
6333bc0d | 4986 | if the symbol needs copy reloc or the symbol is undefined |
04ebc307 | 4987 | when building executable. Copy dynamic function pointer |
aec6b87e L |
4988 | relocations. Don't generate dynamic relocations against |
4989 | resolved undefined weak symbols in PIE. */ | |
0e1862bb | 4990 | if ((bfd_link_pic (info) |
aec6b87e | 4991 | && !(bfd_link_pie (info) |
fd9edc90 | 4992 | && h != NULL |
6333bc0d L |
4993 | && (h->needs_copy |
4994 | || eh->needs_copy | |
4995 | || h->root.type == bfd_link_hash_undefined) | |
d8457a04 L |
4996 | && (IS_X86_64_PCREL_TYPE (r_type) |
4997 | || r_type == R_X86_64_SIZE32 | |
4998 | || r_type == R_X86_64_SIZE64)) | |
4bc6e03a | 4999 | && (h == NULL |
aec6b87e L |
5000 | || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
5001 | && !resolved_to_zero) | |
5002 | || h->root.type != bfd_link_hash_undefweak)) | |
1788fc08 L |
5003 | && ((! IS_X86_64_PCREL_TYPE (r_type) |
5004 | && r_type != R_X86_64_SIZE32 | |
5005 | && r_type != R_X86_64_SIZE64) | |
d8045f23 | 5006 | || ! SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c | 5007 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 5008 | && !bfd_link_pic (info) |
c434dee6 AJ |
5009 | && h != NULL |
5010 | && h->dynindx != -1 | |
aec6b87e L |
5011 | && (!h->non_got_ref |
5012 | || eh->func_pointer_refcount > 0 | |
5013 | || (h->root.type == bfd_link_hash_undefweak | |
5014 | && !resolved_to_zero)) | |
bae420ef L |
5015 | && ((h->def_dynamic && !h->def_regular) |
5016 | /* Undefined weak symbol is bound locally when | |
5017 | PIC is false. */ | |
0f88be7a | 5018 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
5019 | { |
5020 | Elf_Internal_Rela outrel; | |
b34976b6 | 5021 | bfd_boolean skip, relocate; |
c434dee6 | 5022 | asection *sreloc; |
70256ad8 AJ |
5023 | |
5024 | /* When generating a shared object, these relocations | |
5025 | are copied into the output file to be resolved at run | |
407443a3 | 5026 | time. */ |
b34976b6 AM |
5027 | skip = FALSE; |
5028 | relocate = FALSE; | |
70256ad8 | 5029 | |
c629eae0 JJ |
5030 | outrel.r_offset = |
5031 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 5032 | rel->r_offset); |
c629eae0 | 5033 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 5034 | skip = TRUE; |
0fb19cbc | 5035 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 5036 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
5037 | |
5038 | outrel.r_offset += (input_section->output_section->vma | |
5039 | + input_section->output_offset); | |
5040 | ||
5041 | if (skip) | |
0bb2d96a | 5042 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 5043 | |
fd8ab9e5 AJ |
5044 | /* h->dynindx may be -1 if this symbol was marked to |
5045 | become local. */ | |
5046 | else if (h != NULL | |
c434dee6 | 5047 | && h->dynindx != -1 |
d8045f23 | 5048 | && (IS_X86_64_PCREL_TYPE (r_type) |
4e0c91e4 L |
5049 | || !(bfd_link_executable (info) |
5050 | || SYMBOLIC_BIND (info, h)) | |
d8045f23 | 5051 | || ! h->def_regular)) |
70256ad8 | 5052 | { |
351f65ca | 5053 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 5054 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
5055 | } |
5056 | else | |
5057 | { | |
4c10bbaa L |
5058 | /* This symbol is local, or marked to become local. |
5059 | When relocation overflow check is disabled, we | |
5060 | convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
5061 | if (r_type == htab->pointer_r_type | |
5062 | || (r_type == R_X86_64_32 | |
5063 | && info->no_reloc_overflow_check)) | |
607c0e09 | 5064 | { |
b34976b6 | 5065 | relocate = TRUE; |
351f65ca | 5066 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
5067 | outrel.r_addend = relocation + rel->r_addend; |
5068 | } | |
64d25c44 L |
5069 | else if (r_type == R_X86_64_64 |
5070 | && !ABI_64_P (output_bfd)) | |
5071 | { | |
5072 | relocate = TRUE; | |
5073 | outrel.r_info = htab->r_info (0, | |
5074 | R_X86_64_RELATIVE64); | |
5075 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
5076 | /* Check addend overflow. */ |
5077 | if ((outrel.r_addend & 0x80000000) | |
5078 | != (rel->r_addend & 0x80000000)) | |
5079 | { | |
5080 | const char *name; | |
268a8d3a | 5081 | int addend = rel->r_addend; |
8cf0d2dd L |
5082 | if (h && h->root.root.string) |
5083 | name = h->root.root.string; | |
5084 | else | |
5085 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
5086 | sym, NULL); | |
d42c267e AM |
5087 | _bfd_error_handler |
5088 | /* xgettext:c-format */ | |
5089 | (_("%B: addend %s%#x in relocation %s against " | |
5090 | "symbol `%s' at %#Lx in section `%A' is " | |
5091 | "out of range"), | |
5092 | input_bfd, addend < 0 ? "-" : "", addend, | |
5093 | howto->name, name, rel->r_offset, input_section); | |
8cf0d2dd L |
5094 | bfd_set_error (bfd_error_bad_value); |
5095 | return FALSE; | |
5096 | } | |
64d25c44 | 5097 | } |
607c0e09 AS |
5098 | else |
5099 | { | |
5100 | long sindx; | |
5101 | ||
8517fae7 | 5102 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
5103 | sindx = 0; |
5104 | else if (sec == NULL || sec->owner == NULL) | |
5105 | { | |
5106 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 5107 | return FALSE; |
607c0e09 AS |
5108 | } |
5109 | else | |
5110 | { | |
5111 | asection *osec; | |
5112 | ||
74541ad4 AM |
5113 | /* We are turning this relocation into one |
5114 | against a section symbol. It would be | |
5115 | proper to subtract the symbol's value, | |
5116 | osec->vma, from the emitted reloc addend, | |
5117 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
5118 | osec = sec->output_section; |
5119 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
5120 | if (sindx == 0) |
5121 | { | |
5122 | asection *oi = htab->elf.text_index_section; | |
5123 | sindx = elf_section_data (oi)->dynindx; | |
5124 | } | |
5125 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
5126 | } |
5127 | ||
351f65ca | 5128 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
5129 | outrel.r_addend = relocation + rel->r_addend; |
5130 | } | |
70256ad8 AJ |
5131 | } |
5132 | ||
cbe950e9 | 5133 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 5134 | |
62d78908 L |
5135 | if (sreloc == NULL || sreloc->contents == NULL) |
5136 | { | |
5137 | r = bfd_reloc_notsupported; | |
5138 | goto check_relocation_error; | |
5139 | } | |
c434dee6 | 5140 | |
351f65ca | 5141 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
5142 | |
5143 | /* If this reloc is against an external symbol, we do | |
5144 | not want to fiddle with the addend. Otherwise, we | |
5145 | need to include the symbol value so that it becomes | |
5146 | an addend for the dynamic reloc. */ | |
0f88be7a | 5147 | if (! relocate) |
70256ad8 AJ |
5148 | continue; |
5149 | } | |
5150 | ||
5151 | break; | |
5152 | ||
bffbf940 | 5153 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
5154 | case R_X86_64_GOTPC32_TLSDESC: |
5155 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 5156 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
5157 | tls_type = GOT_UNKNOWN; |
5158 | if (h == NULL && local_got_offsets) | |
351f65ca | 5159 | tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 5160 | else if (h != NULL) |
351f65ca | 5161 | tls_type = elf_x86_64_hash_entry (h)->tls_type; |
142411ca | 5162 | |
351f65ca L |
5163 | if (! elf_x86_64_tls_transition (info, input_bfd, |
5164 | input_section, contents, | |
5165 | symtab_hdr, sym_hashes, | |
5166 | &r_type, tls_type, rel, | |
bedfd056 | 5167 | relend, h, r_symndx, TRUE)) |
534a31f6 | 5168 | return FALSE; |
bffbf940 JJ |
5169 | |
5170 | if (r_type == R_X86_64_TPOFF32) | |
5171 | { | |
142411ca L |
5172 | bfd_vma roff = rel->r_offset; |
5173 | ||
bffbf940 | 5174 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 5175 | |
351f65ca | 5176 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 5177 | { |
52bc799a | 5178 | /* GD->LE transition. For 64bit, change |
e2cbcd91 L |
5179 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
5180 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5181 | or | |
5182 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
5183 | .byte 0x66; rex64 | |
5184 | call *__tls_get_addr@GOTPCREL(%rip) | |
5185 | which may be converted to | |
5186 | addr32 call __tls_get_addr | |
52bc799a | 5187 | into: |
e2cbcd91 L |
5188 | movq %fs:0, %rax |
5189 | leaq foo@tpoff(%rax), %rax | |
52bc799a | 5190 | For 32bit, change |
e2cbcd91 L |
5191 | leaq foo@tlsgd(%rip), %rdi |
5192 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5193 | or | |
5194 | leaq foo@tlsgd(%rip), %rdi | |
5195 | .byte 0x66; rex64 | |
5196 | call *__tls_get_addr@GOTPCREL(%rip) | |
5197 | which may be converted to | |
5198 | addr32 call __tls_get_addr | |
52bc799a | 5199 | into: |
e2cbcd91 L |
5200 | movl %fs:0, %eax |
5201 | leaq foo@tpoff(%rax), %rax | |
5c98a14e | 5202 | For largepic, change: |
e2cbcd91 L |
5203 | leaq foo@tlsgd(%rip), %rdi |
5204 | movabsq $__tls_get_addr@pltoff, %rax | |
5205 | addq %r15, %rax | |
5206 | call *%rax | |
5c98a14e | 5207 | into: |
e2cbcd91 L |
5208 | movq %fs:0, %rax |
5209 | leaq foo@tpoff(%rax), %rax | |
5210 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 5211 | int largepic = 0; |
e2cbcd91 | 5212 | if (ABI_64_P (output_bfd)) |
5c98a14e | 5213 | { |
e2cbcd91 L |
5214 | if (contents[roff + 5] == 0xb8) |
5215 | { | |
5216 | memcpy (contents + roff - 3, | |
5217 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
5218 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
5219 | largepic = 1; | |
5220 | } | |
5221 | else | |
5222 | memcpy (contents + roff - 4, | |
5223 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
5224 | 16); | |
5c98a14e | 5225 | } |
52bc799a L |
5226 | else |
5227 | memcpy (contents + roff - 3, | |
5228 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
5229 | 15); | |
eb4ff4d6 | 5230 | bfd_put_32 (output_bfd, |
351f65ca | 5231 | elf_x86_64_tpoff (info, relocation), |
5c98a14e | 5232 | contents + roff + 8 + largepic); |
e2cbcd91 L |
5233 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, |
5234 | R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */ | |
bffbf940 | 5235 | rel++; |
60f2e42e | 5236 | wrel++; |
bffbf940 JJ |
5237 | continue; |
5238 | } | |
351f65ca | 5239 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
5240 | { |
5241 | /* GDesc -> LE transition. | |
5242 | It's originally something like: | |
5243 | leaq x@tlsdesc(%rip), %rax | |
5244 | ||
5245 | Change it to: | |
c9736ba0 | 5246 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 5247 | |
c9736ba0 | 5248 | unsigned int val, type; |
67a4f2b7 | 5249 | |
67a4f2b7 | 5250 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 5251 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
5252 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
5253 | contents + roff - 3); | |
5254 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
5255 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
5256 | contents + roff - 1); | |
eb4ff4d6 | 5257 | bfd_put_32 (output_bfd, |
351f65ca | 5258 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
5259 | contents + roff); |
5260 | continue; | |
5261 | } | |
351f65ca | 5262 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
5263 | { |
5264 | /* GDesc -> LE transition. | |
5265 | It's originally: | |
5266 | call *(%rax) | |
5267 | Turn it into: | |
142411ca | 5268 | xchg %ax,%ax. */ |
10efb593 | 5269 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
5270 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
5271 | continue; | |
5272 | } | |
351f65ca | 5273 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 5274 | { |
bffbf940 | 5275 | /* IE->LE transition: |
cf61b747 | 5276 | For 64bit, originally it can be one of: |
bffbf940 JJ |
5277 | movq foo@gottpoff(%rip), %reg |
5278 | addq foo@gottpoff(%rip), %reg | |
5279 | We change it into: | |
5280 | movq $foo, %reg | |
5281 | leaq foo(%reg), %reg | |
cf61b747 L |
5282 | addq $foo, %reg. |
5283 | For 32bit, originally it can be one of: | |
5284 | movq foo@gottpoff(%rip), %reg | |
5285 | addl foo@gottpoff(%rip), %reg | |
5286 | We change it into: | |
5287 | movq $foo, %reg | |
5288 | leal foo(%reg), %reg | |
5289 | addl $foo, %reg. */ | |
142411ca L |
5290 | |
5291 | unsigned int val, type, reg; | |
5292 | ||
cf61b747 L |
5293 | if (roff >= 3) |
5294 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
5295 | else | |
5296 | val = 0; | |
142411ca L |
5297 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
5298 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 5299 | reg >>= 3; |
bffbf940 JJ |
5300 | if (type == 0x8b) |
5301 | { | |
5302 | /* movq */ | |
5303 | if (val == 0x4c) | |
5304 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 5305 | contents + roff - 3); |
4a4c5f25 L |
5306 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5307 | bfd_put_8 (output_bfd, 0x41, | |
5308 | contents + roff - 3); | |
bffbf940 | 5309 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 5310 | contents + roff - 2); |
bffbf940 | 5311 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 5312 | contents + roff - 1); |
bffbf940 JJ |
5313 | } |
5314 | else if (reg == 4) | |
5315 | { | |
cf61b747 L |
5316 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
5317 | is special */ | |
bffbf940 JJ |
5318 | if (val == 0x4c) |
5319 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 5320 | contents + roff - 3); |
4a4c5f25 L |
5321 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5322 | bfd_put_8 (output_bfd, 0x41, | |
5323 | contents + roff - 3); | |
bffbf940 | 5324 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 5325 | contents + roff - 2); |
bffbf940 | 5326 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 5327 | contents + roff - 1); |
bffbf940 JJ |
5328 | } |
5329 | else | |
5330 | { | |
cf61b747 | 5331 | /* addq/addl -> leaq/leal */ |
bffbf940 JJ |
5332 | if (val == 0x4c) |
5333 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 5334 | contents + roff - 3); |
4a4c5f25 L |
5335 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5336 | bfd_put_8 (output_bfd, 0x45, | |
5337 | contents + roff - 3); | |
bffbf940 | 5338 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 5339 | contents + roff - 2); |
bffbf940 | 5340 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 5341 | contents + roff - 1); |
bffbf940 | 5342 | } |
eb4ff4d6 | 5343 | bfd_put_32 (output_bfd, |
351f65ca | 5344 | elf_x86_64_tpoff (info, relocation), |
142411ca | 5345 | contents + roff); |
bffbf940 JJ |
5346 | continue; |
5347 | } | |
142411ca L |
5348 | else |
5349 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
5350 | } |
5351 | ||
6de2ae4a | 5352 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
5353 | abort (); |
5354 | ||
5355 | if (h != NULL) | |
67a4f2b7 AO |
5356 | { |
5357 | off = h->got.offset; | |
351f65ca | 5358 | offplt = elf_x86_64_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 5359 | } |
bffbf940 JJ |
5360 | else |
5361 | { | |
5362 | if (local_got_offsets == NULL) | |
5363 | abort (); | |
5364 | ||
5365 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 5366 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
5367 | } |
5368 | ||
5369 | if ((off & 1) != 0) | |
5370 | off &= ~1; | |
26e41594 | 5371 | else |
bffbf940 JJ |
5372 | { |
5373 | Elf_Internal_Rela outrel; | |
bffbf940 | 5374 | int dr_type, indx; |
67a4f2b7 | 5375 | asection *sreloc; |
bffbf940 | 5376 | |
6de2ae4a | 5377 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
5378 | abort (); |
5379 | ||
67a4f2b7 AO |
5380 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
5381 | ||
5382 | if (GOT_TLS_GDESC_P (tls_type)) | |
5383 | { | |
351f65ca | 5384 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 5385 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
5386 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
5387 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
5388 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
5389 | + offplt |
5390 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 5391 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 5392 | if (indx == 0) |
351f65ca | 5393 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
67a4f2b7 AO |
5394 | else |
5395 | outrel.r_addend = 0; | |
351f65ca | 5396 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
5397 | } |
5398 | ||
6de2ae4a | 5399 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 5400 | |
6de2ae4a L |
5401 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5402 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 5403 | |
67a4f2b7 | 5404 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 5405 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
5406 | else if (GOT_TLS_GDESC_P (tls_type)) |
5407 | goto dr_done; | |
bffbf940 JJ |
5408 | else |
5409 | dr_type = R_X86_64_TPOFF64; | |
5410 | ||
6de2ae4a | 5411 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 5412 | outrel.r_addend = 0; |
67a4f2b7 AO |
5413 | if ((dr_type == R_X86_64_TPOFF64 |
5414 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
351f65ca L |
5415 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
5416 | outrel.r_info = htab->r_info (indx, dr_type); | |
bffbf940 | 5417 | |
351f65ca | 5418 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 5419 | |
67a4f2b7 | 5420 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
5421 | { |
5422 | if (indx == 0) | |
5423 | { | |
d40d037c | 5424 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 5425 | bfd_put_64 (output_bfd, |
351f65ca | 5426 | relocation - elf_x86_64_dtpoff_base (info), |
6de2ae4a | 5427 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
5428 | } |
5429 | else | |
5430 | { | |
5431 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5432 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5433 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
5434 | R_X86_64_DTPOFF64); |
5435 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 5436 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 5437 | &outrel); |
bffbf940 JJ |
5438 | } |
5439 | } | |
5440 | ||
67a4f2b7 | 5441 | dr_done: |
bffbf940 JJ |
5442 | if (h != NULL) |
5443 | h->got.offset |= 1; | |
5444 | else | |
5445 | local_got_offsets[r_symndx] |= 1; | |
5446 | } | |
5447 | ||
67a4f2b7 AO |
5448 | if (off >= (bfd_vma) -2 |
5449 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 5450 | abort (); |
351f65ca | 5451 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 5452 | { |
67a4f2b7 AO |
5453 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
5454 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
5455 | relocation = htab->elf.sgotplt->output_section->vma |
5456 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
5457 | + offplt + htab->sgotplt_jump_table_size; |
5458 | else | |
6de2ae4a L |
5459 | relocation = htab->elf.sgot->output_section->vma |
5460 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5461 | unresolved_reloc = FALSE; |
bffbf940 | 5462 | } |
142411ca | 5463 | else |
67a4f2b7 | 5464 | { |
142411ca | 5465 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 5466 | |
351f65ca | 5467 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 5468 | { |
52bc799a | 5469 | /* GD->IE transition. For 64bit, change |
e2cbcd91 L |
5470 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
5471 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5472 | or | |
5473 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
5474 | .byte 0x66; rex64 | |
5475 | call *__tls_get_addr@GOTPCREL(%rip | |
5476 | which may be converted to | |
5477 | addr32 call __tls_get_addr | |
52bc799a | 5478 | into: |
e2cbcd91 L |
5479 | movq %fs:0, %rax |
5480 | addq foo@gottpoff(%rip), %rax | |
52bc799a | 5481 | For 32bit, change |
e2cbcd91 L |
5482 | leaq foo@tlsgd(%rip), %rdi |
5483 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5484 | or | |
5485 | leaq foo@tlsgd(%rip), %rdi | |
5486 | .byte 0x66; rex64; | |
5487 | call *__tls_get_addr@GOTPCREL(%rip) | |
5488 | which may be converted to | |
5489 | addr32 call __tls_get_addr | |
52bc799a | 5490 | into: |
e2cbcd91 L |
5491 | movl %fs:0, %eax |
5492 | addq foo@gottpoff(%rip), %rax | |
5c98a14e | 5493 | For largepic, change: |
e2cbcd91 L |
5494 | leaq foo@tlsgd(%rip), %rdi |
5495 | movabsq $__tls_get_addr@pltoff, %rax | |
5496 | addq %r15, %rax | |
5497 | call *%rax | |
5c98a14e | 5498 | into: |
e2cbcd91 L |
5499 | movq %fs:0, %rax |
5500 | addq foo@gottpoff(%rax), %rax | |
5501 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 5502 | int largepic = 0; |
e2cbcd91 | 5503 | if (ABI_64_P (output_bfd)) |
5c98a14e | 5504 | { |
e2cbcd91 L |
5505 | if (contents[roff + 5] == 0xb8) |
5506 | { | |
5507 | memcpy (contents + roff - 3, | |
5508 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
5509 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
5510 | largepic = 1; | |
5511 | } | |
5512 | else | |
5513 | memcpy (contents + roff - 4, | |
5514 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
5515 | 16); | |
5c98a14e | 5516 | } |
52bc799a L |
5517 | else |
5518 | memcpy (contents + roff - 3, | |
5519 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
5520 | 15); | |
142411ca | 5521 | |
6de2ae4a L |
5522 | relocation = (htab->elf.sgot->output_section->vma |
5523 | + htab->elf.sgot->output_offset + off | |
142411ca | 5524 | - roff |
5c98a14e | 5525 | - largepic |
142411ca L |
5526 | - input_section->output_section->vma |
5527 | - input_section->output_offset | |
5528 | - 12); | |
5529 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
5530 | contents + roff + 8 + largepic); |
5531 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 5532 | rel++; |
60f2e42e | 5533 | wrel++; |
142411ca L |
5534 | continue; |
5535 | } | |
351f65ca | 5536 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
5537 | { |
5538 | /* GDesc -> IE transition. | |
5539 | It's originally something like: | |
5540 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 5541 | |
142411ca | 5542 | Change it to: |
c9736ba0 | 5543 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 5544 | |
142411ca L |
5545 | /* Now modify the instruction as appropriate. To |
5546 | turn a leaq into a movq in the form we use it, it | |
5547 | suffices to change the second byte from 0x8d to | |
5548 | 0x8b. */ | |
5549 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
5550 | ||
5551 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
5552 | htab->elf.sgot->output_section->vma |
5553 | + htab->elf.sgot->output_offset + off | |
142411ca L |
5554 | - rel->r_offset |
5555 | - input_section->output_section->vma | |
5556 | - input_section->output_offset | |
5557 | - 4, | |
5558 | contents + roff); | |
5559 | continue; | |
5560 | } | |
351f65ca | 5561 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
5562 | { |
5563 | /* GDesc -> IE transition. | |
5564 | It's originally: | |
5565 | call *(%rax) | |
5566 | ||
5567 | Change it to: | |
c9736ba0 | 5568 | xchg %ax, %ax. */ |
142411ca | 5569 | |
142411ca L |
5570 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
5571 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
5572 | continue; | |
5573 | } | |
5574 | else | |
5575 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 5576 | } |
bffbf940 JJ |
5577 | break; |
5578 | ||
5579 | case R_X86_64_TLSLD: | |
351f65ca L |
5580 | if (! elf_x86_64_tls_transition (info, input_bfd, |
5581 | input_section, contents, | |
5582 | symtab_hdr, sym_hashes, | |
bedfd056 L |
5583 | &r_type, GOT_UNKNOWN, rel, |
5584 | relend, h, r_symndx, TRUE)) | |
142411ca | 5585 | return FALSE; |
a3fadc9a | 5586 | |
142411ca L |
5587 | if (r_type != R_X86_64_TLSLD) |
5588 | { | |
bffbf940 | 5589 | /* LD->LE transition: |
e2cbcd91 L |
5590 | leaq foo@tlsld(%rip), %rdi |
5591 | call __tls_get_addr@PLT | |
5592 | For 64bit, we change it into: | |
5593 | .word 0x6666; .byte 0x66; movq %fs:0, %rax | |
5594 | For 32bit, we change it into: | |
5595 | nopl 0x0(%rax); movl %fs:0, %eax | |
5596 | Or | |
5597 | leaq foo@tlsld(%rip), %rdi; | |
5598 | call *__tls_get_addr@GOTPCREL(%rip) | |
5599 | which may be converted to | |
5600 | addr32 call __tls_get_addr | |
52bc799a | 5601 | For 64bit, we change it into: |
e2cbcd91 | 5602 | .word 0x6666; .word 0x6666; movq %fs:0, %rax |
52bc799a | 5603 | For 32bit, we change it into: |
e2cbcd91 | 5604 | nopw 0x0(%rax); movl %fs:0, %eax |
5c98a14e | 5605 | For largepic, change: |
e2cbcd91 L |
5606 | leaq foo@tlsgd(%rip), %rdi |
5607 | movabsq $__tls_get_addr@pltoff, %rax | |
5608 | addq %rbx, %rax | |
5609 | call *%rax | |
5610 | into | |
5611 | data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
5612 | movq %fs:0, %eax */ | |
142411ca L |
5613 | |
5614 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
e2cbcd91 L |
5615 | if (ABI_64_P (output_bfd)) |
5616 | { | |
5617 | if (contents[rel->r_offset + 5] == 0xb8) | |
5618 | memcpy (contents + rel->r_offset - 3, | |
5619 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
5620 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
5621 | else if (contents[rel->r_offset + 4] == 0xff | |
5622 | || contents[rel->r_offset + 4] == 0x67) | |
5623 | memcpy (contents + rel->r_offset - 3, | |
5624 | "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", | |
5625 | 13); | |
5626 | else | |
5627 | memcpy (contents + rel->r_offset - 3, | |
5628 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
5629 | } | |
52bc799a | 5630 | else |
e2cbcd91 L |
5631 | { |
5632 | if (contents[rel->r_offset + 4] == 0xff) | |
5633 | memcpy (contents + rel->r_offset - 3, | |
5634 | "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", | |
5635 | 13); | |
5636 | else | |
5637 | memcpy (contents + rel->r_offset - 3, | |
5638 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
5639 | } | |
5640 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX | |
5641 | and R_X86_64_PLTOFF64. */ | |
bffbf940 | 5642 | rel++; |
60f2e42e | 5643 | wrel++; |
bffbf940 JJ |
5644 | continue; |
5645 | } | |
5646 | ||
6de2ae4a | 5647 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
5648 | abort (); |
5649 | ||
5650 | off = htab->tls_ld_got.offset; | |
5651 | if (off & 1) | |
5652 | off &= ~1; | |
5653 | else | |
5654 | { | |
5655 | Elf_Internal_Rela outrel; | |
bffbf940 | 5656 | |
6de2ae4a | 5657 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
5658 | abort (); |
5659 | ||
6de2ae4a L |
5660 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5661 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
5662 | |
5663 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5664 | htab->elf.sgot->contents + off); |
bffbf940 | 5665 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 5666 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5667 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 5668 | outrel.r_addend = 0; |
351f65ca | 5669 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 5670 | &outrel); |
bffbf940 JJ |
5671 | htab->tls_ld_got.offset |= 1; |
5672 | } | |
6de2ae4a L |
5673 | relocation = htab->elf.sgot->output_section->vma |
5674 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5675 | unresolved_reloc = FALSE; |
bffbf940 JJ |
5676 | break; |
5677 | ||
5678 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
5679 | if (!bfd_link_executable (info) |
5680 | || (input_section->flags & SEC_CODE) == 0) | |
351f65ca | 5681 | relocation -= elf_x86_64_dtpoff_base (info); |
bffbf940 | 5682 | else |
351f65ca | 5683 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5684 | break; |
5685 | ||
5686 | case R_X86_64_TPOFF32: | |
6769d501 | 5687 | case R_X86_64_TPOFF64: |
0e1862bb | 5688 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 5689 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5690 | break; |
5691 | ||
a69ed7f7 L |
5692 | case R_X86_64_DTPOFF64: |
5693 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
5694 | relocation -= elf_x86_64_dtpoff_base (info); | |
5695 | break; | |
5696 | ||
70256ad8 AJ |
5697 | default: |
5698 | break; | |
5699 | } | |
8d88c4ca | 5700 | |
239e1f3a AM |
5701 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
5702 | because such sections are not SEC_ALLOC and thus ld.so will | |
5703 | not process them. */ | |
c434dee6 | 5704 | if (unresolved_reloc |
239e1f3a | 5705 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
5706 | && h->def_dynamic) |
5707 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
5708 | rel->r_offset) != (bfd_vma) -1) | |
a040981f | 5709 | { |
4eca0228 | 5710 | _bfd_error_handler |
695344c0 | 5711 | /* xgettext:c-format */ |
d42c267e | 5712 | (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"), |
a040981f L |
5713 | input_bfd, |
5714 | input_section, | |
d42c267e | 5715 | rel->r_offset, |
a040981f L |
5716 | howto->name, |
5717 | h->root.root.string); | |
5718 | return FALSE; | |
5719 | } | |
c434dee6 | 5720 | |
cbe950e9 | 5721 | do_relocation: |
8d88c4ca | 5722 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
5723 | contents, rel->r_offset, |
5724 | relocation, rel->r_addend); | |
8d88c4ca | 5725 | |
62d78908 | 5726 | check_relocation_error: |
8d88c4ca | 5727 | if (r != bfd_reloc_ok) |
8da6118f | 5728 | { |
c434dee6 AJ |
5729 | const char *name; |
5730 | ||
5731 | if (h != NULL) | |
5732 | name = h->root.root.string; | |
5733 | else | |
8da6118f | 5734 | { |
c434dee6 AJ |
5735 | name = bfd_elf_string_from_elf_section (input_bfd, |
5736 | symtab_hdr->sh_link, | |
5737 | sym->st_name); | |
5738 | if (name == NULL) | |
b34976b6 | 5739 | return FALSE; |
c434dee6 AJ |
5740 | if (*name == '\0') |
5741 | name = bfd_section_name (input_bfd, sec); | |
5742 | } | |
5743 | ||
5744 | if (r == bfd_reloc_overflow) | |
1a72702b AM |
5745 | (*info->callbacks->reloc_overflow) |
5746 | (info, (h ? &h->root : NULL), name, howto->name, | |
5747 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
c434dee6 AJ |
5748 | else |
5749 | { | |
4eca0228 | 5750 | _bfd_error_handler |
695344c0 | 5751 | /* xgettext:c-format */ |
d42c267e | 5752 | (_("%B(%A+%#Lx): reloc against `%s': error %d"), |
d003868e | 5753 | input_bfd, input_section, |
d42c267e | 5754 | rel->r_offset, name, (int) r); |
b34976b6 | 5755 | return FALSE; |
8da6118f KH |
5756 | } |
5757 | } | |
60f2e42e L |
5758 | |
5759 | if (wrel != rel) | |
5760 | *wrel = *rel; | |
5761 | } | |
5762 | ||
5763 | if (wrel != rel) | |
5764 | { | |
5765 | Elf_Internal_Shdr *rel_hdr; | |
5766 | size_t deleted = rel - wrel; | |
5767 | ||
5768 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
5769 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5770 | if (rel_hdr->sh_size == 0) | |
5771 | { | |
5772 | /* It is too late to remove an empty reloc section. Leave | |
5773 | one NONE reloc. | |
5774 | ??? What is wrong with an empty section??? */ | |
5775 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
5776 | deleted -= 1; | |
5777 | } | |
5778 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
5779 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5780 | input_section->reloc_count -= deleted; | |
8d88c4ca | 5781 | } |
70256ad8 | 5782 | |
b34976b6 | 5783 | return TRUE; |
70256ad8 AJ |
5784 | } |
5785 | ||
5786 | /* Finish up dynamic symbol handling. We set the contents of various | |
5787 | dynamic sections here. */ | |
5788 | ||
b34976b6 | 5789 | static bfd_boolean |
351f65ca L |
5790 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
5791 | struct bfd_link_info *info, | |
5792 | struct elf_link_hash_entry *h, | |
aec6b87e | 5793 | Elf_Internal_Sym *sym) |
70256ad8 | 5794 | { |
351f65ca | 5795 | struct elf_x86_64_link_hash_table *htab; |
f2c29a16 | 5796 | bfd_boolean use_plt_second; |
dd7e64d4 | 5797 | struct elf_x86_64_link_hash_entry *eh; |
aec6b87e | 5798 | bfd_boolean local_undefweak; |
70256ad8 | 5799 | |
351f65ca | 5800 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
5801 | if (htab == NULL) |
5802 | return FALSE; | |
70256ad8 | 5803 | |
f2c29a16 L |
5804 | /* Use the second PLT section only if there is .plt section. */ |
5805 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
0ff2b86e | 5806 | |
dd7e64d4 | 5807 | eh = (struct elf_x86_64_link_hash_entry *) h; |
9e9821dd L |
5808 | if (eh->no_finish_dynamic_symbol) |
5809 | abort (); | |
dd7e64d4 | 5810 | |
aec6b87e L |
5811 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
5812 | resolved undefined weak symbols in executable so that their | |
5813 | references have value 0 at run-time. */ | |
e62b9723 L |
5814 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
5815 | eh->has_got_reloc, | |
5816 | eh); | |
aec6b87e | 5817 | |
70256ad8 AJ |
5818 | if (h->plt.offset != (bfd_vma) -1) |
5819 | { | |
70256ad8 | 5820 | bfd_vma plt_index; |
38b12349 | 5821 | bfd_vma got_offset, plt_offset; |
70256ad8 | 5822 | Elf_Internal_Rela rela; |
947216bf | 5823 | bfd_byte *loc; |
0ff2b86e | 5824 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 5825 | const struct elf_backend_data *bed; |
5974eba6 | 5826 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
5827 | |
5828 | /* When building a static executable, use .iplt, .igot.plt and | |
5829 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 5830 | if (htab->elf.splt != NULL) |
cbe950e9 | 5831 | { |
6de2ae4a L |
5832 | plt = htab->elf.splt; |
5833 | gotplt = htab->elf.sgotplt; | |
5834 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
5835 | } |
5836 | else | |
5837 | { | |
6de2ae4a L |
5838 | plt = htab->elf.iplt; |
5839 | gotplt = htab->elf.igotplt; | |
5840 | relplt = htab->elf.irelplt; | |
cbe950e9 | 5841 | } |
70256ad8 AJ |
5842 | |
5843 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 5844 | it up. */ |
cbe950e9 | 5845 | if ((h->dynindx == -1 |
aec6b87e | 5846 | && !local_undefweak |
0e1862bb | 5847 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
5848 | && h->def_regular |
5849 | && h->type == STT_GNU_IFUNC)) | |
5850 | || plt == NULL | |
5851 | || gotplt == NULL | |
5852 | || relplt == NULL) | |
cec7f46a | 5853 | abort (); |
70256ad8 AJ |
5854 | |
5855 | /* Get the index in the procedure linkage table which | |
5856 | corresponds to this symbol. This is the index of this symbol | |
5857 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 5858 | first entry in the procedure linkage table is reserved. |
6bbec505 | 5859 | |
cbe950e9 | 5860 | Get the offset into the .got table of the entry that |
407443a3 | 5861 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
5862 | bytes. The first three are reserved for the dynamic linker. |
5863 | ||
5864 | For static executables, we don't reserve anything. */ | |
5865 | ||
6de2ae4a | 5866 | if (plt == htab->elf.splt) |
cbe950e9 | 5867 | { |
38b12349 L |
5868 | got_offset = (h->plt.offset / htab->plt.plt_entry_size |
5869 | - htab->plt.has_plt0); | |
e1f98742 | 5870 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
5871 | } |
5872 | else | |
5873 | { | |
38b12349 | 5874 | got_offset = h->plt.offset / htab->plt.plt_entry_size; |
e1f98742 | 5875 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 5876 | } |
70256ad8 | 5877 | |
38b12349 L |
5878 | /* Fill in the entry in the procedure linkage table. */ |
5879 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, | |
5880 | htab->plt.plt_entry_size); | |
f2c29a16 | 5881 | if (use_plt_second) |
0ff2b86e | 5882 | { |
f2c29a16 | 5883 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
38b12349 L |
5884 | htab->non_lazy_plt->plt_entry, |
5885 | htab->non_lazy_plt->plt_entry_size); | |
0ff2b86e | 5886 | |
f2c29a16 L |
5887 | resolved_plt = htab->plt_second; |
5888 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
5889 | } |
5890 | else | |
5891 | { | |
0ff2b86e L |
5892 | resolved_plt = plt; |
5893 | plt_offset = h->plt.offset; | |
5894 | } | |
eed180f8 RM |
5895 | |
5896 | /* Insert the relocation positions of the plt section. */ | |
5897 | ||
5898 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
5899 | subtracting the size of that instruction. */ | |
ab7fede8 L |
5900 | plt_got_pcrel_offset = (gotplt->output_section->vma |
5901 | + gotplt->output_offset | |
5902 | + got_offset | |
5903 | - resolved_plt->output_section->vma | |
5904 | - resolved_plt->output_offset | |
5905 | - plt_offset | |
38b12349 | 5906 | - htab->plt.plt_got_insn_size); |
ab7fede8 L |
5907 | |
5908 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 5909 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
695344c0 | 5910 | /* xgettext:c-format */ |
ab7fede8 L |
5911 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"), |
5912 | output_bfd, h->root.root.string); | |
5913 | ||
5914 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
38b12349 L |
5915 | (resolved_plt->contents + plt_offset |
5916 | + htab->plt.plt_got_offset)); | |
cbe950e9 | 5917 | |
653165cc | 5918 | /* Fill in the entry in the global offset table, initially this |
aec6b87e L |
5919 | points to the second part of the PLT entry. Leave the entry |
5920 | as zero for undefined weak symbol in PIE. No PLT relocation | |
5921 | against undefined weak symbol in PIE. */ | |
5922 | if (!local_undefweak) | |
cbe950e9 | 5923 | { |
38b12349 L |
5924 | if (htab->plt.has_plt0) |
5925 | bfd_put_64 (output_bfd, (plt->output_section->vma | |
5926 | + plt->output_offset | |
5927 | + h->plt.offset | |
5928 | + htab->lazy_plt->plt_lazy_offset), | |
5929 | gotplt->contents + got_offset); | |
aec6b87e L |
5930 | |
5931 | /* Fill in the entry in the .rela.plt section. */ | |
5932 | rela.r_offset = (gotplt->output_section->vma | |
5933 | + gotplt->output_offset | |
5934 | + got_offset); | |
5935 | if (h->dynindx == -1 | |
5936 | || ((bfd_link_executable (info) | |
5937 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
5938 | && h->def_regular | |
5939 | && h->type == STT_GNU_IFUNC)) | |
5940 | { | |
6322e5c5 L |
5941 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
5942 | h->root.root.string, | |
5943 | h->root.u.def.section->owner); | |
5944 | ||
aec6b87e L |
5945 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
5946 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
5947 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); | |
5948 | rela.r_addend = (h->root.u.def.value | |
5949 | + h->root.u.def.section->output_section->vma | |
5950 | + h->root.u.def.section->output_offset); | |
5951 | /* R_X86_64_IRELATIVE comes last. */ | |
5952 | plt_index = htab->next_irelative_index--; | |
5953 | } | |
5954 | else | |
5955 | { | |
5956 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); | |
5957 | rela.r_addend = 0; | |
5958 | plt_index = htab->next_jump_slot_index++; | |
5959 | } | |
e1f98742 | 5960 | |
38b12349 L |
5961 | /* Don't fill the second and third slots in PLT entry for |
5962 | static executables nor without PLT0. */ | |
5963 | if (plt == htab->elf.splt && htab->plt.has_plt0) | |
aec6b87e | 5964 | { |
38b12349 L |
5965 | bfd_vma plt0_offset |
5966 | = h->plt.offset + htab->lazy_plt->plt_plt_insn_end; | |
aec6b87e L |
5967 | |
5968 | /* Put relocation index. */ | |
5969 | bfd_put_32 (output_bfd, plt_index, | |
5970 | (plt->contents + h->plt.offset | |
38b12349 | 5971 | + htab->lazy_plt->plt_reloc_offset)); |
aec6b87e L |
5972 | |
5973 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
5974 | check relocation index for overflow since branch displacement | |
5975 | will overflow first. */ | |
5976 | if (plt0_offset > 0x80000000) | |
695344c0 | 5977 | /* xgettext:c-format */ |
aec6b87e L |
5978 | info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"), |
5979 | output_bfd, h->root.root.string); | |
5980 | bfd_put_32 (output_bfd, - plt0_offset, | |
38b12349 L |
5981 | (plt->contents + h->plt.offset |
5982 | + htab->lazy_plt->plt_plt_offset)); | |
aec6b87e | 5983 | } |
351f65ca | 5984 | |
aec6b87e L |
5985 | bed = get_elf_backend_data (output_bfd); |
5986 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
5987 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
5988 | } | |
dd7e64d4 L |
5989 | } |
5990 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
5991 | { | |
38b12349 | 5992 | bfd_vma got_offset, plt_offset; |
dd7e64d4 L |
5993 | asection *plt, *got; |
5994 | bfd_boolean got_after_plt; | |
5995 | int32_t got_pcrel_offset; | |
dd7e64d4 L |
5996 | |
5997 | /* Set the entry in the GOT procedure linkage table. */ | |
5998 | plt = htab->plt_got; | |
5999 | got = htab->elf.sgot; | |
6000 | got_offset = h->got.offset; | |
6001 | ||
6002 | if (got_offset == (bfd_vma) -1 | |
e492d2f8 | 6003 | || (h->type == STT_GNU_IFUNC && h->def_regular) |
dd7e64d4 L |
6004 | || plt == NULL |
6005 | || got == NULL) | |
6006 | abort (); | |
70256ad8 | 6007 | |
38b12349 | 6008 | /* Use the non-lazy PLT entry template for the GOT PLT since they |
dd7e64d4 | 6009 | are the identical. */ |
dd7e64d4 L |
6010 | /* Fill in the entry in the GOT procedure linkage table. */ |
6011 | plt_offset = eh->plt_got.offset; | |
6012 | memcpy (plt->contents + plt_offset, | |
38b12349 L |
6013 | htab->non_lazy_plt->plt_entry, |
6014 | htab->non_lazy_plt->plt_entry_size); | |
dd7e64d4 L |
6015 | |
6016 | /* Put offset the PC-relative instruction referring to the GOT | |
6017 | entry, subtracting the size of that instruction. */ | |
6018 | got_pcrel_offset = (got->output_section->vma | |
6019 | + got->output_offset | |
6020 | + got_offset | |
6021 | - plt->output_section->vma | |
6022 | - plt->output_offset | |
6023 | - plt_offset | |
38b12349 | 6024 | - htab->non_lazy_plt->plt_got_insn_size); |
dd7e64d4 L |
6025 | |
6026 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
6027 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
6028 | if ((got_after_plt && got_pcrel_offset < 0) | |
6029 | || (!got_after_plt && got_pcrel_offset > 0)) | |
695344c0 | 6030 | /* xgettext:c-format */ |
dd7e64d4 L |
6031 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"), |
6032 | output_bfd, h->root.root.string); | |
6033 | ||
6034 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
38b12349 L |
6035 | (plt->contents + plt_offset |
6036 | + htab->non_lazy_plt->plt_got_offset)); | |
dd7e64d4 L |
6037 | } |
6038 | ||
aec6b87e L |
6039 | if (!local_undefweak |
6040 | && !h->def_regular | |
dd7e64d4 L |
6041 | && (h->plt.offset != (bfd_vma) -1 |
6042 | || eh->plt_got.offset != (bfd_vma) -1)) | |
6043 | { | |
6044 | /* Mark the symbol as undefined, rather than as defined in | |
6045 | the .plt section. Leave the value if there were any | |
6046 | relocations where pointer equality matters (this is a clue | |
6047 | for the dynamic linker, to make function pointer | |
6048 | comparisons work between an application and shared | |
6049 | library), otherwise set it to zero. If a function is only | |
6050 | called from a binary, there is no need to slow down | |
6051 | shared libraries because of that. */ | |
6052 | sym->st_shndx = SHN_UNDEF; | |
6053 | if (!h->pointer_equality_needed) | |
6054 | sym->st_value = 0; | |
70256ad8 AJ |
6055 | } |
6056 | ||
aec6b87e L |
6057 | /* Don't generate dynamic GOT relocation against undefined weak |
6058 | symbol in executable. */ | |
bffbf940 | 6059 | if (h->got.offset != (bfd_vma) -1 |
351f65ca | 6060 | && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type) |
aec6b87e L |
6061 | && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE |
6062 | && !local_undefweak) | |
053579d7 | 6063 | { |
053579d7 | 6064 | Elf_Internal_Rela rela; |
233cc9c1 | 6065 | asection *relgot = htab->elf.srelgot; |
053579d7 AJ |
6066 | |
6067 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 6068 | up. */ |
6de2ae4a | 6069 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 6070 | abort (); |
053579d7 | 6071 | |
6de2ae4a L |
6072 | rela.r_offset = (htab->elf.sgot->output_section->vma |
6073 | + htab->elf.sgot->output_offset | |
dc810e39 | 6074 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
6075 | |
6076 | /* If this is a static link, or it is a -Bsymbolic link and the | |
6077 | symbol is defined locally or was forced to be local because | |
6078 | of a version file, we just want to emit a RELATIVE reloc. | |
6079 | The entry in the global offset table will already have been | |
6080 | initialized in the relocate_section function. */ | |
710ab287 | 6081 | if (h->def_regular |
0018b0a3 L |
6082 | && h->type == STT_GNU_IFUNC) |
6083 | { | |
233cc9c1 L |
6084 | if (h->plt.offset == (bfd_vma) -1) |
6085 | { | |
6086 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
6087 | if (htab->elf.splt == NULL) | |
6088 | { | |
6089 | /* use .rel[a].iplt section to store .got relocations | |
6090 | in static executable. */ | |
6091 | relgot = htab->elf.irelplt; | |
6092 | } | |
6093 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
6094 | { | |
6322e5c5 L |
6095 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
6096 | output_bfd, | |
6097 | h->root.root.string, | |
6098 | h->root.u.def.section->owner); | |
6099 | ||
233cc9c1 L |
6100 | rela.r_info = htab->r_info (0, |
6101 | R_X86_64_IRELATIVE); | |
6102 | rela.r_addend = (h->root.u.def.value | |
6103 | + h->root.u.def.section->output_section->vma | |
6104 | + h->root.u.def.section->output_offset); | |
6105 | } | |
6106 | else | |
6107 | goto do_glob_dat; | |
6108 | } | |
6109 | else if (bfd_link_pic (info)) | |
710ab287 L |
6110 | { |
6111 | /* Generate R_X86_64_GLOB_DAT. */ | |
6112 | goto do_glob_dat; | |
6113 | } | |
6114 | else | |
6115 | { | |
90d60710 | 6116 | asection *plt; |
aab82f4c | 6117 | bfd_vma plt_offset; |
90d60710 | 6118 | |
710ab287 L |
6119 | if (!h->pointer_equality_needed) |
6120 | abort (); | |
6121 | ||
6122 | /* For non-shared object, we can't use .got.plt, which | |
6123 | contains the real function addres if we need pointer | |
6124 | equality. We load the GOT entry with the PLT entry. */ | |
f2c29a16 | 6125 | if (htab->plt_second != NULL) |
aab82f4c | 6126 | { |
f2c29a16 L |
6127 | plt = htab->plt_second; |
6128 | plt_offset = eh->plt_second.offset; | |
aab82f4c L |
6129 | } |
6130 | else | |
6131 | { | |
6132 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
6133 | plt_offset = h->plt.offset; | |
6134 | } | |
710ab287 L |
6135 | bfd_put_64 (output_bfd, (plt->output_section->vma |
6136 | + plt->output_offset | |
aab82f4c | 6137 | + plt_offset), |
6de2ae4a | 6138 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
6139 | return TRUE; |
6140 | } | |
0018b0a3 | 6141 | } |
0e1862bb | 6142 | else if (bfd_link_pic (info) |
0018b0a3 | 6143 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
053579d7 | 6144 | { |
41bed6dd L |
6145 | if (!h->def_regular) |
6146 | return FALSE; | |
cc78d0af | 6147 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 6148 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
6149 | rela.r_addend = (h->root.u.def.value |
6150 | + h->root.u.def.section->output_section->vma | |
6151 | + h->root.u.def.section->output_offset); | |
6152 | } | |
6153 | else | |
6154 | { | |
6155 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 6156 | do_glob_dat: |
c434dee6 | 6157 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 6158 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 6159 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
6160 | rela.r_addend = 0; |
6161 | } | |
6162 | ||
233cc9c1 | 6163 | elf_append_rela (output_bfd, relgot, &rela); |
053579d7 AJ |
6164 | } |
6165 | ||
f5385ebf | 6166 | if (h->needs_copy) |
70256ad8 | 6167 | { |
70256ad8 | 6168 | Elf_Internal_Rela rela; |
5474d94f | 6169 | asection *s; |
70256ad8 AJ |
6170 | |
6171 | /* This symbol needs a copy reloc. Set it up. */ | |
6172 | ||
c434dee6 AJ |
6173 | if (h->dynindx == -1 |
6174 | || (h->root.type != bfd_link_hash_defined | |
6175 | && h->root.type != bfd_link_hash_defweak) | |
5474d94f AM |
6176 | || htab->elf.srelbss == NULL |
6177 | || htab->elf.sreldynrelro == NULL) | |
c434dee6 | 6178 | abort (); |
70256ad8 AJ |
6179 | |
6180 | rela.r_offset = (h->root.u.def.value | |
6181 | + h->root.u.def.section->output_section->vma | |
6182 | + h->root.u.def.section->output_offset); | |
351f65ca | 6183 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 6184 | rela.r_addend = 0; |
afbf7e8e | 6185 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
6186 | s = htab->elf.sreldynrelro; |
6187 | else | |
6188 | s = htab->elf.srelbss; | |
6189 | elf_append_rela (output_bfd, s, &rela); | |
70256ad8 AJ |
6190 | } |
6191 | ||
b34976b6 | 6192 | return TRUE; |
70256ad8 AJ |
6193 | } |
6194 | ||
c25bc9fc L |
6195 | /* Finish up local dynamic symbol handling. We set the contents of |
6196 | various dynamic sections here. */ | |
6197 | ||
6198 | static bfd_boolean | |
351f65ca | 6199 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
6200 | { |
6201 | struct elf_link_hash_entry *h | |
6202 | = (struct elf_link_hash_entry *) *slot; | |
6203 | struct bfd_link_info *info | |
eed180f8 | 6204 | = (struct bfd_link_info *) inf; |
c25bc9fc | 6205 | |
351f65ca | 6206 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
c25bc9fc L |
6207 | info, h, NULL); |
6208 | } | |
6209 | ||
aec6b87e L |
6210 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
6211 | here since undefined weak symbol may not be dynamic and may not be | |
6212 | called for elf_x86_64_finish_dynamic_symbol. */ | |
6213 | ||
6214 | static bfd_boolean | |
6215 | elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
6216 | void *inf) | |
6217 | { | |
6218 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
6219 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
6220 | ||
6221 | if (h->root.type != bfd_link_hash_undefweak | |
6222 | || h->dynindx != -1) | |
6223 | return TRUE; | |
6224 | ||
6225 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, | |
6226 | info, h, NULL); | |
6227 | } | |
6228 | ||
c434dee6 AJ |
6229 | /* Used to decide how to sort relocs in an optimal manner for the |
6230 | dynamic linker, before writing them out. */ | |
6231 | ||
6232 | static enum elf_reloc_type_class | |
cae1fbbb | 6233 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
6234 | const asection *rel_sec ATTRIBUTE_UNUSED, |
6235 | const Elf_Internal_Rela *rela) | |
c434dee6 | 6236 | { |
cae1fbbb L |
6237 | bfd *abfd = info->output_bfd; |
6238 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
6239 | struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info); | |
cae1fbbb | 6240 | |
d9e3b590 L |
6241 | if (htab->elf.dynsym != NULL |
6242 | && htab->elf.dynsym->contents != NULL) | |
6243 | { | |
6244 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
6245 | dynamic symbols. */ | |
6246 | unsigned long r_symndx = htab->r_sym (rela->r_info); | |
897463b1 L |
6247 | if (r_symndx != STN_UNDEF) |
6248 | { | |
6249 | Elf_Internal_Sym sym; | |
6250 | if (!bed->s->swap_symbol_in (abfd, | |
6251 | (htab->elf.dynsym->contents | |
6252 | + r_symndx * bed->s->sizeof_sym), | |
6253 | 0, &sym)) | |
6254 | abort (); | |
d9e3b590 | 6255 | |
897463b1 L |
6256 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
6257 | return reloc_class_ifunc; | |
6258 | } | |
d9e3b590 | 6259 | } |
cae1fbbb | 6260 | |
351f65ca | 6261 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 | 6262 | { |
c428ce9d L |
6263 | case R_X86_64_IRELATIVE: |
6264 | return reloc_class_ifunc; | |
c434dee6 | 6265 | case R_X86_64_RELATIVE: |
1da80baa | 6266 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
6267 | return reloc_class_relative; |
6268 | case R_X86_64_JUMP_SLOT: | |
6269 | return reloc_class_plt; | |
6270 | case R_X86_64_COPY: | |
6271 | return reloc_class_copy; | |
6272 | default: | |
6273 | return reloc_class_normal; | |
6274 | } | |
6275 | } | |
6276 | ||
70256ad8 AJ |
6277 | /* Finish up the dynamic sections. */ |
6278 | ||
b34976b6 | 6279 | static bfd_boolean |
351f65ca L |
6280 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
6281 | struct bfd_link_info *info) | |
70256ad8 | 6282 | { |
351f65ca | 6283 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
6284 | bfd *dynobj; |
6285 | asection *sdyn; | |
70256ad8 | 6286 | |
351f65ca | 6287 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
6288 | if (htab == NULL) |
6289 | return FALSE; | |
6290 | ||
c434dee6 | 6291 | dynobj = htab->elf.dynobj; |
3d4d4302 | 6292 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
70256ad8 | 6293 | |
c434dee6 | 6294 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 6295 | { |
82e96e07 L |
6296 | bfd_byte *dyncon, *dynconend; |
6297 | const struct elf_backend_data *bed; | |
6298 | bfd_size_type sizeof_dyn; | |
70256ad8 | 6299 | |
6de2ae4a | 6300 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 6301 | abort (); |
70256ad8 | 6302 | |
82e96e07 L |
6303 | bed = get_elf_backend_data (dynobj); |
6304 | sizeof_dyn = bed->s->sizeof_dyn; | |
6305 | dyncon = sdyn->contents; | |
6306 | dynconend = sdyn->contents + sdyn->size; | |
6307 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
6308 | { |
6309 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
6310 | asection *s; |
6311 | ||
82e96e07 | 6312 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
6313 | |
6314 | switch (dyn.d_tag) | |
6315 | { | |
6316 | default: | |
053579d7 | 6317 | continue; |
70256ad8 AJ |
6318 | |
6319 | case DT_PLTGOT: | |
6de2ae4a | 6320 | s = htab->elf.sgotplt; |
8c37241b | 6321 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 6322 | break; |
70256ad8 AJ |
6323 | |
6324 | case DT_JMPREL: | |
6de2ae4a | 6325 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 6326 | break; |
70256ad8 | 6327 | |
c434dee6 | 6328 | case DT_PLTRELSZ: |
6de2ae4a | 6329 | s = htab->elf.srelplt->output_section; |
eea6121a | 6330 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
6331 | break; |
6332 | ||
67a4f2b7 | 6333 | case DT_TLSDESC_PLT: |
6de2ae4a | 6334 | s = htab->elf.splt; |
67a4f2b7 AO |
6335 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
6336 | + htab->tlsdesc_plt; | |
6337 | break; | |
6338 | ||
6339 | case DT_TLSDESC_GOT: | |
6de2ae4a | 6340 | s = htab->elf.sgot; |
67a4f2b7 AO |
6341 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
6342 | + htab->tlsdesc_got; | |
6343 | break; | |
70256ad8 | 6344 | } |
c434dee6 | 6345 | |
82e96e07 | 6346 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
6347 | } |
6348 | ||
6de2ae4a | 6349 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 6350 | { |
eed180f8 | 6351 | elf_section_data (htab->elf.splt->output_section) |
38b12349 | 6352 | ->this_hdr.sh_entsize = htab->plt.plt_entry_size; |
67a4f2b7 | 6353 | |
38b12349 | 6354 | if (htab->plt.has_plt0) |
67a4f2b7 | 6355 | { |
38b12349 L |
6356 | /* Fill in the special first entry in the procedure linkage |
6357 | table. */ | |
6358 | memcpy (htab->elf.splt->contents, | |
6359 | htab->lazy_plt->plt0_entry, | |
6360 | htab->lazy_plt->plt_entry_size); | |
6361 | /* Add offset for pushq GOT+8(%rip), since the instruction | |
6362 | uses 6 bytes subtract this value. */ | |
67a4f2b7 | 6363 | bfd_put_32 (output_bfd, |
6de2ae4a L |
6364 | (htab->elf.sgotplt->output_section->vma |
6365 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 6366 | + 8 |
6de2ae4a L |
6367 | - htab->elf.splt->output_section->vma |
6368 | - htab->elf.splt->output_offset | |
67a4f2b7 | 6369 | - 6), |
38b12349 L |
6370 | (htab->elf.splt->contents |
6371 | + htab->lazy_plt->plt0_got1_offset)); | |
6372 | /* Add offset for the PC-relative instruction accessing | |
6373 | GOT+16, subtracting the offset to the end of that | |
6374 | instruction. */ | |
67a4f2b7 | 6375 | bfd_put_32 (output_bfd, |
38b12349 L |
6376 | (htab->elf.sgotplt->output_section->vma |
6377 | + htab->elf.sgotplt->output_offset | |
6378 | + 16 | |
6de2ae4a L |
6379 | - htab->elf.splt->output_section->vma |
6380 | - htab->elf.splt->output_offset | |
38b12349 L |
6381 | - htab->lazy_plt->plt0_got2_insn_end), |
6382 | (htab->elf.splt->contents | |
6383 | + htab->lazy_plt->plt0_got2_offset)); | |
6384 | ||
6385 | if (htab->tlsdesc_plt) | |
6386 | { | |
6387 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6388 | htab->elf.sgot->contents + htab->tlsdesc_got); | |
6389 | ||
6390 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, | |
6391 | htab->lazy_plt->plt0_entry, | |
6392 | htab->lazy_plt->plt_entry_size); | |
6393 | ||
6394 | /* Add offset for pushq GOT+8(%rip), since the | |
6395 | instruction uses 6 bytes subtract this value. */ | |
6396 | bfd_put_32 (output_bfd, | |
6397 | (htab->elf.sgotplt->output_section->vma | |
6398 | + htab->elf.sgotplt->output_offset | |
6399 | + 8 | |
6400 | - htab->elf.splt->output_section->vma | |
6401 | - htab->elf.splt->output_offset | |
6402 | - htab->tlsdesc_plt | |
6403 | - 6), | |
6404 | (htab->elf.splt->contents | |
6405 | + htab->tlsdesc_plt | |
6406 | + htab->lazy_plt->plt0_got1_offset)); | |
6407 | /* Add offset for the PC-relative instruction accessing | |
6408 | GOT+TDG, where TDG stands for htab->tlsdesc_got, | |
6409 | subtracting the offset to the end of that | |
6410 | instruction. */ | |
6411 | bfd_put_32 (output_bfd, | |
6412 | (htab->elf.sgot->output_section->vma | |
6413 | + htab->elf.sgot->output_offset | |
6414 | + htab->tlsdesc_got | |
6415 | - htab->elf.splt->output_section->vma | |
6416 | - htab->elf.splt->output_offset | |
6417 | - htab->tlsdesc_plt | |
6418 | - htab->lazy_plt->plt0_got2_insn_end), | |
6419 | (htab->elf.splt->contents | |
6420 | + htab->tlsdesc_plt | |
6421 | + htab->lazy_plt->plt0_got2_offset)); | |
6422 | } | |
67a4f2b7 | 6423 | } |
70256ad8 | 6424 | } |
70256ad8 AJ |
6425 | } |
6426 | ||
38b12349 L |
6427 | if (htab->plt_got != NULL && htab->plt_got->size > 0) |
6428 | elf_section_data (htab->plt_got->output_section) | |
6429 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; | |
6430 | ||
f2c29a16 L |
6431 | if (htab->plt_second != NULL && htab->plt_second->size > 0) |
6432 | elf_section_data (htab->plt_second->output_section) | |
38b12349 | 6433 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; |
0ff2b86e | 6434 | |
38b12349 L |
6435 | /* GOT is always created in setup_gnu_properties. But it may not be |
6436 | needed. */ | |
6437 | if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0) | |
70256ad8 | 6438 | { |
56d4289c L |
6439 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
6440 | { | |
4eca0228 | 6441 | _bfd_error_handler |
56d4289c L |
6442 | (_("discarded output section: `%A'"), htab->elf.sgotplt); |
6443 | return FALSE; | |
6444 | } | |
6445 | ||
38b12349 L |
6446 | /* Set the first entry in the global offset table to the address of |
6447 | the dynamic section. */ | |
6448 | if (sdyn == NULL) | |
6449 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); | |
6450 | else | |
6451 | bfd_put_64 (output_bfd, | |
6452 | sdyn->output_section->vma + sdyn->output_offset, | |
6453 | htab->elf.sgotplt->contents); | |
6454 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ | |
6455 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6456 | htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); | |
6457 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6458 | htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
6459 | ||
6460 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize | |
6461 | = GOT_ENTRY_SIZE; | |
c434dee6 | 6462 | } |
70256ad8 | 6463 | |
e41b3a13 | 6464 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
6465 | if (htab->plt_eh_frame != NULL |
6466 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
6467 | { |
6468 | if (htab->elf.splt != NULL | |
6469 | && htab->elf.splt->size != 0 | |
6470 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
6471 | && htab->elf.splt->output_section != NULL | |
6472 | && htab->plt_eh_frame->output_section != NULL) | |
6473 | { | |
6474 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
6475 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
6476 | + htab->plt_eh_frame->output_offset | |
6477 | + PLT_FDE_START_OFFSET; | |
6478 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
6479 | htab->plt_eh_frame->contents | |
6480 | + PLT_FDE_START_OFFSET); | |
6481 | } | |
dbaa2011 | 6482 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
6483 | { |
6484 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
6485 | htab->plt_eh_frame, | |
6486 | htab->plt_eh_frame->contents)) | |
6487 | return FALSE; | |
6488 | } | |
6489 | } | |
6490 | ||
fff53dae L |
6491 | /* Adjust .eh_frame for .plt.got section. */ |
6492 | if (htab->plt_got_eh_frame != NULL | |
6493 | && htab->plt_got_eh_frame->contents != NULL) | |
6494 | { | |
6495 | if (htab->plt_got != NULL | |
6496 | && htab->plt_got->size != 0 | |
6497 | && (htab->plt_got->flags & SEC_EXCLUDE) == 0 | |
6498 | && htab->plt_got->output_section != NULL | |
6499 | && htab->plt_got_eh_frame->output_section != NULL) | |
6500 | { | |
6501 | bfd_vma plt_start = htab->plt_got->output_section->vma; | |
6502 | bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma | |
6503 | + htab->plt_got_eh_frame->output_offset | |
6504 | + PLT_FDE_START_OFFSET; | |
6505 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
6506 | htab->plt_got_eh_frame->contents | |
6507 | + PLT_FDE_START_OFFSET); | |
6508 | } | |
6509 | if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
6510 | { | |
6511 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
6512 | htab->plt_got_eh_frame, | |
6513 | htab->plt_got_eh_frame->contents)) | |
6514 | return FALSE; | |
6515 | } | |
6516 | } | |
6517 | ||
f2c29a16 L |
6518 | /* Adjust .eh_frame for the second PLT section. */ |
6519 | if (htab->plt_second_eh_frame != NULL | |
6520 | && htab->plt_second_eh_frame->contents != NULL) | |
8361ed4d | 6521 | { |
f2c29a16 L |
6522 | if (htab->plt_second != NULL |
6523 | && htab->plt_second->size != 0 | |
6524 | && (htab->plt_second->flags & SEC_EXCLUDE) == 0 | |
6525 | && htab->plt_second->output_section != NULL | |
6526 | && htab->plt_second_eh_frame->output_section != NULL) | |
8361ed4d | 6527 | { |
f2c29a16 L |
6528 | bfd_vma plt_start = htab->plt_second->output_section->vma; |
6529 | bfd_vma eh_frame_start | |
6530 | = (htab->plt_second_eh_frame->output_section->vma | |
6531 | + htab->plt_second_eh_frame->output_offset | |
6532 | + PLT_FDE_START_OFFSET); | |
8361ed4d | 6533 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, |
f2c29a16 | 6534 | htab->plt_second_eh_frame->contents |
8361ed4d L |
6535 | + PLT_FDE_START_OFFSET); |
6536 | } | |
f2c29a16 L |
6537 | if (htab->plt_second_eh_frame->sec_info_type |
6538 | == SEC_INFO_TYPE_EH_FRAME) | |
8361ed4d L |
6539 | { |
6540 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
f2c29a16 L |
6541 | htab->plt_second_eh_frame, |
6542 | htab->plt_second_eh_frame->contents)) | |
8361ed4d L |
6543 | return FALSE; |
6544 | } | |
6545 | } | |
6546 | ||
6de2ae4a L |
6547 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
6548 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
6549 | = GOT_ENTRY_SIZE; |
6550 | ||
aec6b87e L |
6551 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
6552 | if (bfd_link_pie (info)) | |
6553 | bfd_hash_traverse (&info->hash->table, | |
6554 | elf_x86_64_pie_finish_undefweak_symbol, | |
6555 | info); | |
6556 | ||
b34976b6 | 6557 | return TRUE; |
8d88c4ca NC |
6558 | } |
6559 | ||
233cc9c1 L |
6560 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
6561 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
6562 | It has to be done before elf_link_sort_relocs is called so that | |
6563 | dynamic relocations are properly sorted. */ | |
6564 | ||
6565 | static bfd_boolean | |
6566 | elf_x86_64_output_arch_local_syms | |
6567 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
6568 | struct bfd_link_info *info, | |
6569 | void *flaginfo ATTRIBUTE_UNUSED, | |
6570 | int (*func) (void *, const char *, | |
6571 | Elf_Internal_Sym *, | |
6572 | asection *, | |
6573 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
6574 | { | |
6575 | struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info); | |
6576 | if (htab == NULL) | |
6577 | return FALSE; | |
6578 | ||
6579 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
6580 | htab_traverse (htab->loc_hash_table, | |
6581 | elf_x86_64_finish_local_dynamic_symbol, | |
6582 | info); | |
6583 | ||
6584 | return TRUE; | |
6585 | } | |
6586 | ||
38b12349 | 6587 | /* Sort relocs into address order. */ |
4c45e5c9 | 6588 | |
38b12349 L |
6589 | static int |
6590 | compare_relocs (const void *ap, const void *bp) | |
4c45e5c9 | 6591 | { |
38b12349 L |
6592 | const arelent *a = * (const arelent **) ap; |
6593 | const arelent *b = * (const arelent **) bp; | |
144bed8d | 6594 | |
38b12349 L |
6595 | if (a->address > b->address) |
6596 | return 1; | |
6597 | else if (a->address < b->address) | |
6598 | return -1; | |
3972882e | 6599 | else |
38b12349 L |
6600 | return 0; |
6601 | } | |
cca5b8b6 | 6602 | |
38b12349 L |
6603 | enum elf_x86_64_plt_type |
6604 | { | |
6605 | plt_non_lazy = 0, | |
6606 | plt_lazy = 1 << 0, | |
f2c29a16 | 6607 | plt_second = 1 << 1, |
38b12349 L |
6608 | plt_unknown = -1 |
6609 | }; | |
6610 | ||
6611 | struct elf_x86_64_plt | |
6612 | { | |
6613 | const char *name; | |
6614 | asection *sec; | |
6615 | bfd_byte *contents; | |
6616 | enum elf_x86_64_plt_type type; | |
6617 | unsigned int plt_got_offset; | |
6618 | unsigned int plt_got_insn_size; | |
6619 | unsigned int plt_entry_size; | |
6620 | long count; | |
6621 | }; | |
6622 | ||
6623 | /* Forward declaration. */ | |
6624 | static const struct elf_x86_64_lazy_plt_layout elf_x86_64_nacl_plt; | |
6625 | ||
6626 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all | |
6627 | dynamic relocations. */ | |
6628 | ||
6629 | static long | |
6630 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
6631 | long symcount ATTRIBUTE_UNUSED, | |
6632 | asymbol **syms ATTRIBUTE_UNUSED, | |
6633 | long dynsymcount, | |
6634 | asymbol **dynsyms, | |
6635 | asymbol **ret) | |
6636 | { | |
98c5dfc9 | 6637 | long size, count, i, n, len; |
38b12349 L |
6638 | int j; |
6639 | unsigned int plt_got_offset, plt_entry_size, plt_got_insn_size; | |
6640 | asymbol *s; | |
6641 | bfd_byte *plt_contents; | |
6642 | long dynrelcount, relsize; | |
98c5dfc9 | 6643 | arelent **dynrelbuf, *p; |
38b12349 L |
6644 | const struct elf_x86_64_lazy_plt_layout *lazy_plt; |
6645 | const struct elf_x86_64_non_lazy_plt_layout *non_lazy_plt; | |
6646 | const struct elf_x86_64_lazy_plt_layout *lazy_bnd_plt; | |
6647 | const struct elf_x86_64_non_lazy_plt_layout *non_lazy_bnd_plt; | |
ee2fdd6f L |
6648 | const struct elf_x86_64_lazy_plt_layout *lazy_ibt_plt; |
6649 | const struct elf_x86_64_non_lazy_plt_layout *non_lazy_ibt_plt; | |
38b12349 L |
6650 | asection *plt; |
6651 | char *names; | |
6652 | enum elf_x86_64_plt_type plt_type; | |
6653 | struct elf_x86_64_plt plts[] = | |
144bed8d | 6654 | { |
38b12349 L |
6655 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
6656 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
f2c29a16 L |
6657 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, |
6658 | { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
dd9e66ee | 6659 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } |
38b12349 | 6660 | }; |
144bed8d | 6661 | |
38b12349 | 6662 | *ret = NULL; |
144bed8d | 6663 | |
38b12349 L |
6664 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
6665 | return 0; | |
144bed8d | 6666 | |
38b12349 L |
6667 | if (dynsymcount <= 0) |
6668 | return 0; | |
cca5b8b6 | 6669 | |
38b12349 L |
6670 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
6671 | if (relsize <= 0) | |
6672 | return -1; | |
6673 | ||
6674 | dynrelbuf = (arelent **) bfd_malloc (relsize); | |
6675 | if (dynrelbuf == NULL) | |
6676 | return -1; | |
6677 | ||
6678 | dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf, | |
6679 | dynsyms); | |
cca5b8b6 | 6680 | |
38b12349 L |
6681 | /* Sort the relocs by address. */ |
6682 | qsort (dynrelbuf, dynrelcount, sizeof (arelent *), compare_relocs); | |
6683 | ||
6684 | if (get_elf_x86_64_backend_data (abfd)->os == is_normal) | |
144bed8d | 6685 | { |
38b12349 L |
6686 | lazy_plt = &elf_x86_64_lazy_plt; |
6687 | non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
6688 | lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt; | |
6689 | non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt; | |
ee2fdd6f L |
6690 | if (ABI_64_P (abfd)) |
6691 | { | |
6692 | lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; | |
6693 | non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
6694 | } | |
6695 | else | |
6696 | { | |
6697 | lazy_ibt_plt = &elf_x32_lazy_ibt_plt; | |
6698 | non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
6699 | } | |
38b12349 L |
6700 | } |
6701 | else | |
6702 | { | |
6703 | lazy_plt = &elf_x86_64_nacl_plt; | |
6704 | non_lazy_plt = NULL; | |
6705 | lazy_bnd_plt = NULL; | |
6706 | non_lazy_bnd_plt = NULL; | |
ee2fdd6f L |
6707 | lazy_ibt_plt = NULL; |
6708 | non_lazy_ibt_plt = NULL; | |
38b12349 | 6709 | } |
144bed8d | 6710 | |
38b12349 L |
6711 | count = 0; |
6712 | for (j = 0; plts[j].name != NULL; j++) | |
6713 | { | |
6714 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
6715 | if (plt == NULL) | |
6f25f223 | 6716 | continue; |
533d0af0 | 6717 | |
38b12349 L |
6718 | /* Get the PLT section contents. */ |
6719 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
6720 | if (plt_contents == NULL) | |
6721 | break; | |
6722 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
6723 | plt_contents, 0, plt->size)) | |
6724 | { | |
6725 | free (plt_contents); | |
6726 | break; | |
6727 | } | |
144bed8d | 6728 | |
38b12349 L |
6729 | /* Check what kind of PLT it is. */ |
6730 | plt_type = plt_unknown; | |
6731 | if (plts[j].type == plt_unknown) | |
144bed8d | 6732 | { |
38b12349 L |
6733 | /* Match lazy PLT first. Need to check the first two |
6734 | instructions. */ | |
6735 | if ((memcmp (plt_contents, lazy_plt->plt0_entry, | |
6736 | lazy_plt->plt0_got1_offset) == 0) | |
6737 | && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6, | |
6738 | 2) == 0)) | |
6739 | plt_type = plt_lazy; | |
6740 | else if (lazy_bnd_plt != NULL | |
6741 | && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry, | |
6742 | lazy_bnd_plt->plt0_got1_offset) == 0) | |
6743 | && (memcmp (plt_contents + 6, | |
6744 | lazy_bnd_plt->plt0_entry + 6, 3) == 0)) | |
ec1f73bb | 6745 | { |
f2c29a16 | 6746 | plt_type = plt_lazy | plt_second; |
ee2fdd6f L |
6747 | /* The fist entry in the lazy IBT PLT is the same as the |
6748 | lazy BND PLT. */ | |
6749 | if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size, | |
6750 | lazy_ibt_plt->plt_entry, | |
6751 | lazy_ibt_plt->plt_got_offset) == 0)) | |
6752 | lazy_plt = lazy_ibt_plt; | |
6753 | else | |
6754 | lazy_plt = lazy_bnd_plt; | |
ec1f73bb | 6755 | } |
144bed8d | 6756 | } |
fca6ae69 | 6757 | |
38b12349 L |
6758 | if (non_lazy_plt != NULL |
6759 | && (plt_type == plt_unknown || plt_type == plt_non_lazy)) | |
6760 | { | |
6761 | /* Match non-lazy PLT. */ | |
6762 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
6763 | non_lazy_plt->plt_got_offset) == 0) | |
6764 | plt_type = plt_non_lazy; | |
6765 | } | |
6766 | ||
ee2fdd6f | 6767 | if (plt_type == plt_unknown || plt_type == plt_second) |
38b12349 | 6768 | { |
ee2fdd6f L |
6769 | if (non_lazy_bnd_plt != NULL |
6770 | && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry, | |
6771 | non_lazy_bnd_plt->plt_got_offset) == 0)) | |
38b12349 | 6772 | { |
ee2fdd6f | 6773 | /* Match BND PLT. */ |
f2c29a16 | 6774 | plt_type = plt_second; |
38b12349 L |
6775 | non_lazy_plt = non_lazy_bnd_plt; |
6776 | } | |
ee2fdd6f L |
6777 | else if (non_lazy_ibt_plt != NULL |
6778 | && (memcmp (plt_contents, | |
6779 | non_lazy_ibt_plt->plt_entry, | |
6780 | non_lazy_ibt_plt->plt_got_offset) == 0)) | |
6781 | { | |
6782 | /* Match IBT PLT. */ | |
6783 | plt_type = plt_second; | |
6784 | non_lazy_plt = non_lazy_ibt_plt; | |
6785 | } | |
38b12349 L |
6786 | } |
6787 | ||
6788 | if (plt_type == plt_unknown) | |
6789 | continue; | |
6790 | ||
6791 | plts[j].sec = plt; | |
6792 | plts[j].type = plt_type; | |
6793 | ||
6794 | if ((plt_type & plt_lazy)) | |
6795 | { | |
6796 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
6797 | plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size; | |
6798 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
6799 | /* Skip PLT0 in lazy PLT. */ | |
6800 | i = 1; | |
6801 | } | |
6802 | else | |
6803 | { | |
6804 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
6805 | plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size; | |
6806 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
6807 | i = 0; | |
6808 | } | |
6809 | ||
f2c29a16 L |
6810 | /* Skip lazy PLT when the second PLT is used. */ |
6811 | if (plt_type == (plt_lazy | plt_second)) | |
38b12349 L |
6812 | plts[j].count = 0; |
6813 | else | |
6814 | { | |
6815 | n = plt->size / plts[j].plt_entry_size; | |
6816 | plts[j].count = n; | |
6817 | count += n - i; | |
6818 | } | |
6819 | ||
6820 | plts[j].contents = plt_contents; | |
144bed8d L |
6821 | } |
6822 | ||
38b12349 | 6823 | size = count * sizeof (asymbol); |
98c5dfc9 L |
6824 | |
6825 | /* Allocate space for @plt suffixes. */ | |
6826 | n = 0; | |
6827 | for (i = 0; i < dynrelcount; i++) | |
6828 | { | |
6829 | p = dynrelbuf[i]; | |
6830 | size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); | |
6831 | if (p->addend != 0) | |
6832 | size += sizeof ("+0x") - 1 + 8 + 8 * ABI_64_P (abfd); | |
6833 | } | |
6834 | ||
38b12349 L |
6835 | s = *ret = (asymbol *) bfd_zmalloc (size); |
6836 | if (s == NULL) | |
6837 | { | |
6838 | bad_return: | |
6839 | for (j = 0; plts[j].name != NULL; j++) | |
6840 | if (plts[j].contents != NULL) | |
6841 | free (plts[j].contents); | |
6842 | free (dynrelbuf); | |
6843 | return -1; | |
6844 | } | |
3972882e | 6845 | |
38b12349 | 6846 | /* Check for each PLT section. */ |
98c5dfc9 | 6847 | names = (char *) (s + count); |
38b12349 L |
6848 | size = 0; |
6849 | n = 0; | |
6850 | for (j = 0; plts[j].name != NULL; j++) | |
6851 | if ((plt_contents = plts[j].contents) != NULL) | |
6852 | { | |
6853 | long k; | |
6854 | bfd_vma offset; | |
8df9fc9d | 6855 | |
38b12349 L |
6856 | plt_got_offset = plts[j].plt_got_offset; |
6857 | plt_got_insn_size = plts[j].plt_got_insn_size; | |
6858 | plt_entry_size = plts[j].plt_entry_size; | |
0ff2b86e | 6859 | |
38b12349 L |
6860 | plt = plts[j].sec; |
6861 | ||
6862 | if ((plts[j].type & plt_lazy)) | |
6863 | { | |
6864 | /* Skip PLT0 in lazy PLT. */ | |
6865 | k = 1; | |
6866 | offset = plt_entry_size; | |
6867 | } | |
6868 | else | |
6869 | { | |
6870 | k = 0; | |
6871 | offset = 0; | |
6872 | } | |
6873 | ||
6874 | /* Check each PLT entry against dynamic relocations. */ | |
6875 | for (; k < plts[j].count; k++) | |
6876 | { | |
6877 | int off; | |
6878 | bfd_vma got_vma; | |
6879 | long min, max, mid; | |
38b12349 L |
6880 | |
6881 | /* Get the PC-relative offset, a signed 32-bit integer. */ | |
6882 | off = H_GET_32 (abfd, (plt_contents + offset | |
6883 | + plt_got_offset)); | |
6884 | got_vma = plt->vma + offset + off + plt_got_insn_size; | |
6885 | ||
6886 | /* Binary search. */ | |
6887 | p = dynrelbuf[0]; | |
6888 | min = 0; | |
6889 | max = dynrelcount; | |
6890 | while ((min + 1) < max) | |
6891 | { | |
6892 | arelent *r; | |
6893 | ||
6894 | mid = (min + max) / 2; | |
6895 | r = dynrelbuf[mid]; | |
6896 | if (got_vma > r->address) | |
6897 | min = mid; | |
6898 | else if (got_vma < r->address) | |
6899 | max = mid; | |
6900 | else | |
6901 | { | |
6902 | p = r; | |
6903 | break; | |
6904 | } | |
6905 | } | |
6906 | ||
6907 | /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */ | |
6908 | if (got_vma == p->address | |
6909 | && p->howto != NULL | |
6910 | && (p->howto->type == R_X86_64_JUMP_SLOT | |
6911 | || p->howto->type == R_X86_64_GLOB_DAT | |
6912 | || p->howto->type == R_X86_64_IRELATIVE)) | |
6913 | { | |
6914 | *s = **p->sym_ptr_ptr; | |
6915 | /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL | |
6916 | set. Since we are defining a symbol, ensure one | |
6917 | of them is set. */ | |
6918 | if ((s->flags & BSF_LOCAL) == 0) | |
6919 | s->flags |= BSF_GLOBAL; | |
6920 | s->flags |= BSF_SYNTHETIC; | |
6921 | /* This is no longer a section symbol. */ | |
6922 | s->flags &= ~BSF_SECTION_SYM; | |
6923 | s->section = plt; | |
6924 | s->the_bfd = plt->owner; | |
6925 | s->value = offset; | |
98c5dfc9 L |
6926 | s->udata.p = NULL; |
6927 | s->name = names; | |
6928 | len = strlen ((*p->sym_ptr_ptr)->name); | |
6929 | memcpy (names, (*p->sym_ptr_ptr)->name, len); | |
6930 | names += len; | |
38b12349 | 6931 | if (p->addend != 0) |
98c5dfc9 L |
6932 | { |
6933 | char buf[30], *a; | |
6934 | ||
6935 | memcpy (names, "+0x", sizeof ("+0x") - 1); | |
6936 | names += sizeof ("+0x") - 1; | |
6937 | bfd_sprintf_vma (abfd, buf, p->addend); | |
6938 | for (a = buf; *a == '0'; ++a) | |
6939 | ; | |
6940 | size = strlen (a); | |
6941 | memcpy (names, a, size); | |
6942 | names += size; | |
6943 | } | |
6944 | memcpy (names, "@plt", sizeof ("@plt")); | |
6945 | names += sizeof ("@plt"); | |
38b12349 L |
6946 | n++; |
6947 | s++; | |
6948 | } | |
6949 | offset += plt_entry_size; | |
6950 | } | |
6951 | } | |
6952 | ||
6953 | /* PLT entries with R_X86_64_TLSDESC relocations are skipped. */ | |
6954 | if (n == 0) | |
6955 | goto bad_return; | |
6956 | ||
6957 | count = n; | |
6958 | ||
38b12349 L |
6959 | for (j = 0; plts[j].name != NULL; j++) |
6960 | if (plts[j].contents != NULL) | |
6961 | free (plts[j].contents); | |
6962 | ||
6963 | free (dynrelbuf); | |
6964 | ||
6965 | return count; | |
0ff2b86e L |
6966 | } |
6967 | ||
d2b2c203 DJ |
6968 | /* Handle an x86-64 specific section when reading an object file. This |
6969 | is called when elfcode.h finds a section with an unknown type. */ | |
6970 | ||
6971 | static bfd_boolean | |
0c723101 L |
6972 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
6973 | const char *name, int shindex) | |
d2b2c203 DJ |
6974 | { |
6975 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
6976 | return FALSE; | |
6977 | ||
6dc132d9 | 6978 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
6979 | return FALSE; |
6980 | ||
6981 | return TRUE; | |
6982 | } | |
6983 | ||
3b22753a L |
6984 | /* Hook called by the linker routine which adds symbols from an object |
6985 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
6986 | of .bss. */ | |
6987 | ||
6988 | static bfd_boolean | |
351f65ca | 6989 | elf_x86_64_add_symbol_hook (bfd *abfd, |
a43942db | 6990 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
351f65ca L |
6991 | Elf_Internal_Sym *sym, |
6992 | const char **namep ATTRIBUTE_UNUSED, | |
6993 | flagword *flagsp ATTRIBUTE_UNUSED, | |
6994 | asection **secp, | |
6995 | bfd_vma *valp) | |
3b22753a L |
6996 | { |
6997 | asection *lcomm; | |
6998 | ||
6999 | switch (sym->st_shndx) | |
7000 | { | |
7001 | case SHN_X86_64_LCOMMON: | |
7002 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
7003 | if (lcomm == NULL) | |
7004 | { | |
7005 | lcomm = bfd_make_section_with_flags (abfd, | |
7006 | "LARGE_COMMON", | |
7007 | (SEC_ALLOC | |
7008 | | SEC_IS_COMMON | |
7009 | | SEC_LINKER_CREATED)); | |
7010 | if (lcomm == NULL) | |
7011 | return FALSE; | |
7012 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
7013 | } | |
7014 | *secp = lcomm; | |
7015 | *valp = sym->st_size; | |
c35bdf6e | 7016 | return TRUE; |
3b22753a | 7017 | } |
d8045f23 | 7018 | |
3b22753a L |
7019 | return TRUE; |
7020 | } | |
7021 | ||
7022 | ||
7023 | /* Given a BFD section, try to locate the corresponding ELF section | |
7024 | index. */ | |
7025 | ||
7026 | static bfd_boolean | |
351f65ca L |
7027 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
7028 | asection *sec, int *index_return) | |
3b22753a L |
7029 | { |
7030 | if (sec == &_bfd_elf_large_com_section) | |
7031 | { | |
91d6fa6a | 7032 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
7033 | return TRUE; |
7034 | } | |
7035 | return FALSE; | |
7036 | } | |
7037 | ||
7038 | /* Process a symbol. */ | |
7039 | ||
7040 | static void | |
351f65ca L |
7041 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
7042 | asymbol *asym) | |
3b22753a L |
7043 | { |
7044 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
7045 | ||
7046 | switch (elfsym->internal_elf_sym.st_shndx) | |
7047 | { | |
7048 | case SHN_X86_64_LCOMMON: | |
7049 | asym->section = &_bfd_elf_large_com_section; | |
7050 | asym->value = elfsym->internal_elf_sym.st_size; | |
7051 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
7052 | asym->flags &= ~BSF_GLOBAL; | |
7053 | break; | |
7054 | } | |
7055 | } | |
7056 | ||
7057 | static bfd_boolean | |
351f65ca | 7058 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
7059 | { |
7060 | return (sym->st_shndx == SHN_COMMON | |
7061 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
7062 | } | |
7063 | ||
7064 | static unsigned int | |
351f65ca | 7065 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
7066 | { |
7067 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
7068 | return SHN_COMMON; | |
7069 | else | |
7070 | return SHN_X86_64_LCOMMON; | |
7071 | } | |
7072 | ||
7073 | static asection * | |
351f65ca | 7074 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
7075 | { |
7076 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
7077 | return bfd_com_section_ptr; | |
7078 | else | |
7079 | return &_bfd_elf_large_com_section; | |
7080 | } | |
7081 | ||
7082 | static bfd_boolean | |
5d13b3b3 AM |
7083 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
7084 | const Elf_Internal_Sym *sym, | |
351f65ca | 7085 | asection **psec, |
5d13b3b3 AM |
7086 | bfd_boolean newdef, |
7087 | bfd_boolean olddef, | |
351f65ca | 7088 | bfd *oldbfd, |
5d13b3b3 | 7089 | const asection *oldsec) |
3b22753a L |
7090 | { |
7091 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
7092 | normal common symbol. We turn the large common symbol into a |
7093 | normal one. */ | |
5d13b3b3 | 7094 | if (!olddef |
3b22753a | 7095 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
7096 | && !newdef |
7097 | && bfd_is_com_section (*psec) | |
7098 | && oldsec != *psec) | |
3b22753a | 7099 | { |
00492999 | 7100 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 7101 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
7102 | { |
7103 | h->root.u.c.p->section | |
7104 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
7105 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
7106 | } | |
7107 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
7108 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
7109 | *psec = bfd_com_section_ptr; | |
3b22753a L |
7110 | } |
7111 | ||
7112 | return TRUE; | |
7113 | } | |
7114 | ||
7115 | static int | |
351f65ca L |
7116 | elf_x86_64_additional_program_headers (bfd *abfd, |
7117 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
7118 | { |
7119 | asection *s; | |
9a2e389a | 7120 | int count = 0; |
3b22753a L |
7121 | |
7122 | /* Check to see if we need a large readonly segment. */ | |
7123 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
7124 | if (s && (s->flags & SEC_LOAD)) | |
7125 | count++; | |
7126 | ||
7127 | /* Check to see if we need a large data segment. Since .lbss sections | |
7128 | is placed right after the .bss section, there should be no need for | |
7129 | a large data segment just because of .lbss. */ | |
7130 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
7131 | if (s && (s->flags & SEC_LOAD)) | |
7132 | count++; | |
7133 | ||
7134 | return count; | |
7135 | } | |
7136 | ||
fdc90cb4 JJ |
7137 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
7138 | ||
7139 | static bfd_boolean | |
351f65ca | 7140 | elf_x86_64_hash_symbol (struct elf_link_hash_entry *h) |
fdc90cb4 JJ |
7141 | { |
7142 | if (h->plt.offset != (bfd_vma) -1 | |
7143 | && !h->def_regular | |
7144 | && !h->pointer_equality_needed) | |
7145 | return FALSE; | |
7146 | ||
7147 | return _bfd_elf_hash_symbol (h); | |
7148 | } | |
7149 | ||
c543bf9a L |
7150 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
7151 | ||
7152 | static bfd_boolean | |
7153 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
7154 | const bfd_target *output) | |
7155 | { | |
7156 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
7157 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
7158 | && _bfd_elf_relocs_compatible (input, output)); | |
7159 | } | |
7160 | ||
46bed679 L |
7161 | /* Parse x86-64 GNU properties. */ |
7162 | ||
7163 | static enum elf_property_kind | |
7164 | elf_x86_64_parse_gnu_properties (bfd *abfd, unsigned int type, | |
7165 | bfd_byte *ptr, unsigned int datasz) | |
7166 | { | |
7167 | elf_property *prop; | |
7168 | ||
7169 | switch (type) | |
7170 | { | |
7171 | case GNU_PROPERTY_X86_ISA_1_USED: | |
7172 | case GNU_PROPERTY_X86_ISA_1_NEEDED: | |
ee2fdd6f | 7173 | case GNU_PROPERTY_X86_FEATURE_1_AND: |
46bed679 L |
7174 | if (datasz != 4) |
7175 | { | |
7176 | _bfd_error_handler | |
7177 | ((type == GNU_PROPERTY_X86_ISA_1_USED | |
e4097f5e | 7178 | ? _("error: %B: <corrupt x86 ISA used size: 0x%x>") |
ee2fdd6f L |
7179 | : (type == GNU_PROPERTY_X86_ISA_1_NEEDED |
7180 | ? _("error: %B: <corrupt x86 ISA needed size: 0x%x>") | |
7181 | : _("error: %B: <corrupt x86 feature size: 0x%x>"))), | |
46bed679 L |
7182 | abfd, datasz); |
7183 | return property_corrupt; | |
7184 | } | |
7185 | prop = _bfd_elf_get_property (abfd, type, datasz); | |
73caa85d L |
7186 | /* Combine properties of the same type. */ |
7187 | prop->u.number |= bfd_h_get_32 (abfd, ptr); | |
46bed679 L |
7188 | prop->pr_kind = property_number; |
7189 | break; | |
7190 | ||
7191 | default: | |
7192 | return property_ignored; | |
7193 | } | |
7194 | ||
7195 | return property_number; | |
7196 | } | |
7197 | ||
7198 | /* Merge x86-64 GNU property BPROP with APROP. If APROP isn't NULL, | |
7199 | return TRUE if APROP is updated. Otherwise, return TRUE if BPROP | |
7200 | should be merged with ABFD. */ | |
7201 | ||
7202 | static bfd_boolean | |
ee2fdd6f | 7203 | elf_x86_64_merge_gnu_properties (struct bfd_link_info *info, |
5c3ce2bc | 7204 | bfd *abfd ATTRIBUTE_UNUSED, |
46bed679 L |
7205 | elf_property *aprop, |
7206 | elf_property *bprop) | |
7207 | { | |
ee2fdd6f | 7208 | unsigned int number, features; |
46bed679 L |
7209 | bfd_boolean updated = FALSE; |
7210 | unsigned int pr_type = aprop != NULL ? aprop->pr_type : bprop->pr_type; | |
7211 | ||
7212 | switch (pr_type) | |
7213 | { | |
7214 | case GNU_PROPERTY_X86_ISA_1_USED: | |
7215 | case GNU_PROPERTY_X86_ISA_1_NEEDED: | |
7216 | if (aprop != NULL && bprop != NULL) | |
7217 | { | |
7218 | number = aprop->u.number; | |
7219 | aprop->u.number = number | bprop->u.number; | |
7220 | updated = number != (unsigned int) aprop->u.number; | |
7221 | } | |
7222 | else | |
7223 | { | |
7224 | /* Return TRUE if APROP is NULL to indicate that BPROP should | |
7225 | be added to ABFD. */ | |
7226 | updated = aprop == NULL; | |
7227 | } | |
7228 | break; | |
7229 | ||
ee2fdd6f L |
7230 | case GNU_PROPERTY_X86_FEATURE_1_AND: |
7231 | /* Only one of APROP and BPROP can be NULL: | |
7232 | 1. APROP & BPROP when both APROP and BPROP aren't NULL. | |
7233 | 2. If APROP is NULL, remove x86 feature. | |
7234 | 3. Otherwise, do nothing. | |
7235 | */ | |
7236 | if (aprop != NULL && bprop != NULL) | |
7237 | { | |
7238 | features = 0; | |
7239 | if (info->ibt) | |
7240 | features = GNU_PROPERTY_X86_FEATURE_1_IBT; | |
48580982 L |
7241 | if (info->shstk) |
7242 | features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK; | |
ee2fdd6f | 7243 | number = aprop->u.number; |
48580982 L |
7244 | /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and |
7245 | GNU_PROPERTY_X86_FEATURE_1_SHSTK. */ | |
ee2fdd6f L |
7246 | aprop->u.number = (number & bprop->u.number) | features; |
7247 | updated = number != (unsigned int) aprop->u.number; | |
7248 | /* Remove the property if all feature bits are cleared. */ | |
7249 | if (aprop->u.number == 0) | |
7250 | aprop->pr_kind = property_remove; | |
7251 | } | |
7252 | else | |
7253 | { | |
7254 | features = 0; | |
7255 | if (info->ibt) | |
7256 | features = GNU_PROPERTY_X86_FEATURE_1_IBT; | |
48580982 L |
7257 | if (info->shstk) |
7258 | features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK; | |
ee2fdd6f L |
7259 | if (features) |
7260 | { | |
48580982 L |
7261 | /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and |
7262 | GNU_PROPERTY_X86_FEATURE_1_SHSTK. */ | |
ee2fdd6f L |
7263 | if (aprop != NULL) |
7264 | { | |
7265 | number = aprop->u.number; | |
7266 | aprop->u.number = number | features; | |
7267 | updated = number != (unsigned int) aprop->u.number; | |
7268 | } | |
7269 | else | |
7270 | { | |
7271 | bprop->u.number |= features; | |
7272 | updated = TRUE; | |
7273 | } | |
7274 | } | |
7275 | else if (aprop != NULL) | |
7276 | { | |
7277 | aprop->pr_kind = property_remove; | |
7278 | updated = TRUE; | |
7279 | } | |
7280 | } | |
7281 | break; | |
7282 | ||
46bed679 L |
7283 | default: |
7284 | /* Never should happen. */ | |
7285 | abort (); | |
7286 | } | |
7287 | ||
7288 | return updated; | |
7289 | } | |
7290 | ||
38b12349 L |
7291 | /* Set up x86-64 GNU properties. Return the first relocatable ELF input |
7292 | with GNU properties if found. Otherwise, return NULL. */ | |
7293 | ||
7294 | static bfd * | |
7295 | elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info) | |
7296 | { | |
7297 | bfd_boolean normal_target; | |
7298 | bfd_boolean lazy_plt; | |
7299 | asection *sec, *pltsec; | |
7300 | bfd *dynobj; | |
ee2fdd6f L |
7301 | bfd_boolean use_ibt_plt; |
7302 | unsigned int plt_alignment, features; | |
38b12349 | 7303 | struct elf_x86_64_link_hash_table *htab; |
ee2fdd6f | 7304 | bfd *pbfd; |
73784fa5 L |
7305 | bfd *ebfd = NULL; |
7306 | elf_property *prop; | |
ee2fdd6f L |
7307 | |
7308 | features = 0; | |
7309 | if (info->ibt) | |
7310 | features = GNU_PROPERTY_X86_FEATURE_1_IBT; | |
48580982 L |
7311 | if (info->shstk) |
7312 | features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK; | |
ee2fdd6f | 7313 | |
73784fa5 L |
7314 | /* Find a normal input file with GNU property note. */ |
7315 | for (pbfd = info->input_bfds; | |
7316 | pbfd != NULL; | |
7317 | pbfd = pbfd->link.next) | |
7318 | if (bfd_get_flavour (pbfd) == bfd_target_elf_flavour | |
7319 | && bfd_count_sections (pbfd) != 0) | |
7320 | { | |
7321 | ebfd = pbfd; | |
7322 | ||
7323 | if (elf_properties (pbfd) != NULL) | |
7324 | break; | |
7325 | } | |
ee2fdd6f | 7326 | |
73784fa5 L |
7327 | if (ebfd != NULL) |
7328 | { | |
7329 | if (features) | |
ee2fdd6f | 7330 | { |
73784fa5 L |
7331 | /* If features is set, add GNU_PROPERTY_X86_FEATURE_1_IBT and |
7332 | GNU_PROPERTY_X86_FEATURE_1_SHSTK. */ | |
ee2fdd6f L |
7333 | prop = _bfd_elf_get_property (ebfd, |
7334 | GNU_PROPERTY_X86_FEATURE_1_AND, | |
7335 | 4); | |
73784fa5 | 7336 | prop->u.number |= features; |
ee2fdd6f L |
7337 | prop->pr_kind = property_number; |
7338 | ||
73784fa5 L |
7339 | /* Create the GNU property note section if needed. */ |
7340 | if (pbfd == NULL) | |
5d8763a3 | 7341 | { |
73784fa5 L |
7342 | sec = bfd_make_section_with_flags (ebfd, |
7343 | NOTE_GNU_PROPERTY_SECTION_NAME, | |
7344 | (SEC_ALLOC | |
7345 | | SEC_LOAD | |
7346 | | SEC_IN_MEMORY | |
7347 | | SEC_READONLY | |
7348 | | SEC_HAS_CONTENTS | |
7349 | | SEC_DATA)); | |
7350 | if (sec == NULL) | |
7351 | info->callbacks->einfo (_("%F: failed to create GNU property section\n")); | |
7352 | ||
7353 | if (!bfd_set_section_alignment (ebfd, sec, | |
7354 | ABI_64_P (ebfd) ? 3 : 2)) | |
7355 | { | |
5d8763a3 | 7356 | error_alignment: |
73784fa5 L |
7357 | info->callbacks->einfo (_("%F%A: failed to align section\n"), |
7358 | sec); | |
7359 | } | |
ee2fdd6f | 7360 | |
73784fa5 L |
7361 | elf_section_type (sec) = SHT_NOTE; |
7362 | } | |
ee2fdd6f | 7363 | } |
73784fa5 L |
7364 | |
7365 | /* Check GNU_PROPERTY_NO_COPY_ON_PROTECTED. */ | |
7366 | for (; pbfd != NULL; pbfd = pbfd->link.next) | |
7367 | if (bfd_get_flavour (pbfd) == bfd_target_elf_flavour | |
7368 | && (pbfd->flags | |
7369 | & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0) | |
7370 | { | |
7371 | elf_property_list *p; | |
7372 | ||
7373 | /* The property list is sorted in order of type. */ | |
7374 | for (p = elf_properties (pbfd); p != NULL; p = p->next) | |
7375 | { | |
7376 | if (GNU_PROPERTY_NO_COPY_ON_PROTECTED | |
7377 | == p->property.pr_type) | |
7378 | { | |
7379 | /* Clear extern_protected_data if | |
7380 | GNU_PROPERTY_NO_COPY_ON_PROTECTED is | |
7381 | set on any input relocatable file. */ | |
7382 | info->extern_protected_data = FALSE; | |
7383 | break; | |
7384 | } | |
7385 | else if (GNU_PROPERTY_NO_COPY_ON_PROTECTED | |
7386 | < p->property.pr_type) | |
7387 | break; | |
7388 | } | |
7389 | } | |
ee2fdd6f L |
7390 | } |
7391 | ||
7392 | pbfd = _bfd_elf_link_setup_gnu_properties (info); | |
38b12349 L |
7393 | |
7394 | if (bfd_link_relocatable (info)) | |
7395 | return pbfd; | |
7396 | ||
7397 | htab = elf_x86_64_hash_table (info); | |
7398 | if (htab == NULL) | |
7399 | return pbfd; | |
7400 | ||
ee2fdd6f L |
7401 | use_ibt_plt = info->ibtplt || info->ibt; |
7402 | if (!use_ibt_plt && pbfd != NULL) | |
7403 | { | |
7404 | /* Check if GNU_PROPERTY_X86_FEATURE_1_IBT is on. */ | |
7405 | elf_property_list *p; | |
7406 | ||
7407 | /* The property list is sorted in order of type. */ | |
7408 | for (p = elf_properties (pbfd); p; p = p->next) | |
7409 | { | |
7410 | if (GNU_PROPERTY_X86_FEATURE_1_AND == p->property.pr_type) | |
7411 | { | |
7412 | use_ibt_plt = !!(p->property.u.number | |
7413 | & GNU_PROPERTY_X86_FEATURE_1_IBT); | |
7414 | break; | |
7415 | } | |
7416 | else if (GNU_PROPERTY_X86_FEATURE_1_AND < p->property.pr_type) | |
7417 | break; | |
7418 | } | |
7419 | } | |
7420 | ||
38b12349 L |
7421 | dynobj = htab->elf.dynobj; |
7422 | ||
7423 | /* Set htab->elf.dynobj here so that there is no need to check and | |
7424 | set it in check_relocs. */ | |
7425 | if (dynobj == NULL) | |
7426 | { | |
ee2fdd6f L |
7427 | if (pbfd != NULL) |
7428 | { | |
7429 | htab->elf.dynobj = pbfd; | |
7430 | dynobj = pbfd; | |
7431 | } | |
7432 | else | |
7433 | { | |
7434 | bfd *abfd; | |
7435 | ||
7436 | /* Find a normal input file to hold linker created | |
7437 | sections. */ | |
7438 | for (abfd = info->input_bfds; | |
7439 | abfd != NULL; | |
7440 | abfd = abfd->link.next) | |
b7a18930 NC |
7441 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour |
7442 | && (abfd->flags | |
7443 | & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0) | |
ee2fdd6f L |
7444 | { |
7445 | htab->elf.dynobj = abfd; | |
7446 | dynobj = abfd; | |
7447 | break; | |
7448 | } | |
7449 | } | |
38b12349 L |
7450 | } |
7451 | ||
7452 | /* Even when lazy binding is disabled by "-z now", the PLT0 entry may | |
7453 | still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for | |
7454 | canonical function address. */ | |
7455 | htab->plt.has_plt0 = 1; | |
7456 | ||
7457 | if (get_elf_x86_64_backend_data (info->output_bfd)->os | |
7458 | == is_normal) | |
7459 | { | |
ee2fdd6f L |
7460 | if (use_ibt_plt) |
7461 | { | |
7462 | if (ABI_64_P (dynobj)) | |
7463 | { | |
7464 | htab->lazy_plt = &elf_x86_64_lazy_ibt_plt; | |
7465 | htab->non_lazy_plt = &elf_x86_64_non_lazy_ibt_plt; | |
7466 | } | |
7467 | else | |
7468 | { | |
7469 | htab->lazy_plt = &elf_x32_lazy_ibt_plt; | |
7470 | htab->non_lazy_plt = &elf_x32_non_lazy_ibt_plt; | |
7471 | } | |
7472 | } | |
7473 | else if (info->bndplt) | |
38b12349 L |
7474 | { |
7475 | htab->lazy_plt = &elf_x86_64_lazy_bnd_plt; | |
7476 | htab->non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt; | |
7477 | } | |
7478 | else | |
7479 | { | |
7480 | htab->lazy_plt = &elf_x86_64_lazy_plt; | |
7481 | htab->non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
7482 | } | |
7483 | normal_target = TRUE; | |
7484 | } | |
7485 | else | |
7486 | { | |
7487 | htab->lazy_plt = &elf_x86_64_nacl_plt; | |
7488 | htab->non_lazy_plt = NULL; | |
7489 | normal_target = FALSE; | |
7490 | } | |
7491 | ||
7492 | pltsec = htab->elf.splt; | |
7493 | ||
7494 | /* If the non-lazy PLT is available, use it for all PLT entries if | |
7495 | there are no PLT0 or no .plt section. */ | |
7496 | if (htab->non_lazy_plt != NULL | |
7497 | && (!htab->plt.has_plt0 || pltsec == NULL)) | |
7498 | { | |
7499 | lazy_plt = FALSE; | |
7500 | htab->plt.plt_entry | |
7501 | = htab->non_lazy_plt->plt_entry; | |
7502 | htab->plt.plt_entry_size | |
7503 | = htab->non_lazy_plt->plt_entry_size; | |
7504 | htab->plt.plt_got_offset | |
7505 | = htab->non_lazy_plt->plt_got_offset; | |
7506 | htab->plt.plt_got_insn_size | |
7507 | = htab->non_lazy_plt->plt_got_insn_size; | |
7508 | htab->plt.eh_frame_plt_size | |
7509 | = htab->non_lazy_plt->eh_frame_plt_size; | |
7510 | htab->plt.eh_frame_plt | |
7511 | = htab->non_lazy_plt->eh_frame_plt; | |
7512 | } | |
7513 | else | |
7514 | { | |
7515 | lazy_plt = TRUE; | |
7516 | htab->plt.plt_entry | |
7517 | = htab->lazy_plt->plt_entry; | |
7518 | htab->plt.plt_entry_size | |
7519 | = htab->lazy_plt->plt_entry_size; | |
7520 | htab->plt.plt_got_offset | |
7521 | = htab->lazy_plt->plt_got_offset; | |
7522 | htab->plt.plt_got_insn_size | |
7523 | = htab->lazy_plt->plt_got_insn_size; | |
7524 | htab->plt.eh_frame_plt_size | |
7525 | = htab->lazy_plt->eh_frame_plt_size; | |
7526 | htab->plt.eh_frame_plt | |
7527 | = htab->lazy_plt->eh_frame_plt; | |
7528 | } | |
7529 | ||
7530 | /* Return if there are no normal input files. */ | |
7531 | if (dynobj == NULL) | |
7532 | return pbfd; | |
7533 | ||
7534 | /* Since create_dynamic_sections isn't always called, but GOT | |
7535 | relocations need GOT relocations, create them here so that we | |
7536 | don't need to do it in check_relocs. */ | |
7537 | if (htab->elf.sgot == NULL | |
7538 | && !_bfd_elf_create_got_section (dynobj, info)) | |
7539 | info->callbacks->einfo (_("%F: failed to create GOT sections\n")); | |
7540 | ||
7541 | /* Align .got and .got.plt sections to their entry size. Do it here | |
7542 | instead of in create_dynamic_sections so that they are always | |
7543 | properly aligned even if create_dynamic_sections isn't called. */ | |
7544 | sec = htab->elf.sgot; | |
7545 | if (!bfd_set_section_alignment (dynobj, sec, 3)) | |
5d8763a3 | 7546 | goto error_alignment; |
38b12349 L |
7547 | |
7548 | sec = htab->elf.sgotplt; | |
7549 | if (!bfd_set_section_alignment (dynobj, sec, 3)) | |
7550 | goto error_alignment; | |
7551 | ||
7552 | /* Create the ifunc sections here so that check_relocs can be | |
7553 | simplified. */ | |
7554 | if (!_bfd_elf_create_ifunc_sections (dynobj, info)) | |
7555 | info->callbacks->einfo (_("%F: failed to create ifunc sections\n")); | |
7556 | ||
7557 | plt_alignment = bfd_log2 (htab->plt.plt_entry_size); | |
7558 | ||
7559 | if (pltsec != NULL) | |
7560 | { | |
7561 | /* Whe creating executable, set the contents of the .interp | |
7562 | section to the interpreter. */ | |
7563 | if (bfd_link_executable (info) && !info->nointerp) | |
7564 | { | |
7565 | asection *s = bfd_get_linker_section (dynobj, ".interp"); | |
7566 | if (s == NULL) | |
7567 | abort (); | |
7568 | s->size = htab->dynamic_interpreter_size; | |
7569 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
7570 | htab->interp = s; | |
7571 | } | |
7572 | ||
7573 | /* Don't change PLT section alignment for NaCl since it uses | |
7574 | 64-byte PLT entry and sets PLT section alignment to 32 | |
7575 | bytes. Don't create additional PLT sections for NaCl. */ | |
7576 | if (normal_target) | |
7577 | { | |
7578 | const struct elf_backend_data *bed | |
7579 | = get_elf_backend_data (dynobj); | |
7580 | flagword pltflags = (bed->dynamic_sec_flags | |
7581 | | SEC_ALLOC | |
7582 | | SEC_CODE | |
7583 | | SEC_LOAD | |
7584 | | SEC_READONLY); | |
7585 | unsigned int non_lazy_plt_alignment | |
7586 | = bfd_log2 (htab->non_lazy_plt->plt_entry_size); | |
7587 | ||
7588 | sec = pltsec; | |
7589 | if (!bfd_set_section_alignment (sec->owner, sec, | |
7590 | plt_alignment)) | |
7591 | goto error_alignment; | |
7592 | ||
7593 | /* Create the GOT procedure linkage table. */ | |
7594 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
7595 | ".plt.got", | |
7596 | pltflags); | |
7597 | if (sec == NULL) | |
7598 | info->callbacks->einfo (_("%F: failed to create GOT PLT section\n")); | |
7599 | ||
7600 | if (!bfd_set_section_alignment (dynobj, sec, | |
7601 | non_lazy_plt_alignment)) | |
7602 | goto error_alignment; | |
7603 | ||
7604 | htab->plt_got = sec; | |
7605 | ||
ee2fdd6f | 7606 | if (lazy_plt) |
38b12349 | 7607 | { |
ee2fdd6f L |
7608 | sec = NULL; |
7609 | ||
7610 | if (use_ibt_plt) | |
7611 | { | |
7612 | /* Create the second PLT for Intel IBT support. IBT | |
7613 | PLT is supported only for non-NaCl target and is | |
7614 | is needed only for lazy binding. */ | |
7615 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
7616 | ".plt.sec", | |
7617 | pltflags); | |
7618 | if (sec == NULL) | |
7619 | info->callbacks->einfo (_("%F: failed to create IBT-enabled PLT section\n")); | |
7620 | ||
7621 | if (!bfd_set_section_alignment (dynobj, sec, | |
7622 | plt_alignment)) | |
7623 | goto error_alignment; | |
7624 | } | |
7625 | else if (info->bndplt && ABI_64_P (dynobj)) | |
7626 | { | |
7627 | /* Create the second PLT for Intel MPX support. MPX | |
7628 | PLT is supported only for non-NaCl target in 64-bit | |
7629 | mode and is needed only for lazy binding. */ | |
7630 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
7631 | ".plt.sec", | |
7632 | pltflags); | |
7633 | if (sec == NULL) | |
7634 | info->callbacks->einfo (_("%F: failed to create BND PLT section\n")); | |
7635 | ||
7636 | if (!bfd_set_section_alignment (dynobj, sec, | |
7637 | non_lazy_plt_alignment)) | |
7638 | goto error_alignment; | |
7639 | } | |
38b12349 | 7640 | |
f2c29a16 | 7641 | htab->plt_second = sec; |
38b12349 L |
7642 | } |
7643 | } | |
7644 | ||
7645 | if (!info->no_ld_generated_unwind_info) | |
7646 | { | |
7647 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | |
7648 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
7649 | | SEC_LINKER_CREATED); | |
7650 | ||
7651 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
7652 | ".eh_frame", | |
7653 | flags); | |
7654 | if (sec == NULL) | |
7655 | info->callbacks->einfo (_("%F: failed to create PLT .eh_frame section\n")); | |
7656 | ||
7657 | if (!bfd_set_section_alignment (dynobj, sec, | |
7658 | ABI_64_P (dynobj) ? 3 : 2)) | |
7659 | goto error_alignment; | |
7660 | ||
7661 | htab->plt_eh_frame = sec; | |
7662 | ||
7663 | if (htab->plt_got != NULL) | |
7664 | { | |
7665 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
7666 | ".eh_frame", | |
7667 | flags); | |
7668 | if (sec == NULL) | |
7669 | info->callbacks->einfo (_("%F: failed to create GOT PLT .eh_frame section\n")); | |
7670 | ||
7671 | if (!bfd_set_section_alignment (dynobj, sec, | |
7672 | ABI_64_P (dynobj) ? 3 : 2)) | |
7673 | goto error_alignment; | |
7674 | ||
7675 | htab->plt_got_eh_frame = sec; | |
7676 | } | |
7677 | ||
f2c29a16 | 7678 | if (htab->plt_second != NULL) |
38b12349 L |
7679 | { |
7680 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
7681 | ".eh_frame", | |
7682 | flags); | |
7683 | if (sec == NULL) | |
7684 | info->callbacks->einfo (_("%F: failed to create BND PLT .eh_frame section\n")); | |
7685 | ||
7686 | if (!bfd_set_section_alignment (dynobj, sec, 3)) | |
7687 | goto error_alignment; | |
7688 | ||
f2c29a16 | 7689 | htab->plt_second_eh_frame = sec; |
38b12349 L |
7690 | } |
7691 | } | |
7692 | } | |
7693 | ||
7694 | if (normal_target) | |
7695 | { | |
7696 | /* The .iplt section is used for IFUNC symbols in static | |
7697 | executables. */ | |
7698 | sec = htab->elf.iplt; | |
7699 | if (sec != NULL | |
7700 | && !bfd_set_section_alignment (sec->owner, sec, | |
7701 | plt_alignment)) | |
7702 | goto error_alignment; | |
7703 | } | |
7704 | ||
7705 | return pbfd; | |
7706 | } | |
7707 | ||
1d4af308 L |
7708 | static bfd_boolean |
7709 | elf_x86_64_link_check_relocs (bfd *abfd, struct bfd_link_info *info) | |
7710 | { | |
7711 | if (!bfd_link_relocatable (info)) | |
7712 | { | |
7713 | /* Check for __tls_get_addr reference. */ | |
7714 | struct elf_link_hash_entry *h; | |
7715 | h = elf_link_hash_lookup (elf_hash_table (info), "__tls_get_addr", | |
7716 | FALSE, FALSE, FALSE); | |
7717 | if (h != NULL) | |
7718 | ((struct elf_x86_64_link_hash_entry *) h)->tls_get_addr = 1; | |
7719 | } | |
7720 | ||
7721 | /* Invoke the regular ELF backend linker to do all the work. */ | |
7722 | return _bfd_elf_link_check_relocs (abfd, info); | |
7723 | } | |
7724 | ||
9a2e389a | 7725 | static const struct bfd_elf_special_section |
46bed679 | 7726 | elf_x86_64_special_sections[]= |
3b22753a | 7727 | { |
0112cd26 NC |
7728 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
7729 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
7730 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
7731 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
7732 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
7733 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
7734 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
7735 | }; |
7736 | ||
6d00b590 | 7737 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
7738 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
7739 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 7740 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 7741 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 7742 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 7743 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 7744 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
7745 | |
7746 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 7747 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
7748 | #define elf_backend_want_got_plt 1 |
7749 | #define elf_backend_plt_readonly 1 | |
7750 | #define elf_backend_want_plt_sym 0 | |
7751 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 7752 | #define elf_backend_rela_normal 1 |
e41b3a13 | 7753 | #define elf_backend_plt_alignment 4 |
f7483970 | 7754 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 7755 | #define elf_backend_caches_rawsize 1 |
64f52338 | 7756 | #define elf_backend_dtrel_excludes_plt 1 |
5474d94f | 7757 | #define elf_backend_want_dynrelro 1 |
70256ad8 | 7758 | |
351f65ca | 7759 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 7760 | |
70256ad8 | 7761 | #define bfd_elf64_bfd_link_hash_table_create \ |
351f65ca | 7762 | elf_x86_64_link_hash_table_create |
351f65ca | 7763 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 7764 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 7765 | elf_x86_64_reloc_name_lookup |
70256ad8 | 7766 | |
351f65ca | 7767 | #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol |
c543bf9a | 7768 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca L |
7769 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
7770 | #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol | |
38b12349 | 7771 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
351f65ca L |
7772 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections |
7773 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
233cc9c1 | 7774 | #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms |
351f65ca | 7775 | #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook |
351f65ca L |
7776 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus |
7777 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
7778 | #ifdef CORE_HEADER |
7779 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
7780 | #endif | |
351f65ca L |
7781 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
7782 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
7783 | #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections | |
7784 | #define elf_backend_always_size_sections elf_x86_64_always_size_sections | |
74541ad4 | 7785 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 7786 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
351f65ca | 7787 | #define bfd_elf64_mkobject elf_x86_64_mkobject |
0ff2b86e | 7788 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
1d4af308 | 7789 | #define bfd_elf64_bfd_link_check_relocs elf_x86_64_link_check_relocs |
8d88c4ca | 7790 | |
d2b2c203 | 7791 | #define elf_backend_section_from_shdr \ |
351f65ca | 7792 | elf_x86_64_section_from_shdr |
d2b2c203 | 7793 | |
3b22753a | 7794 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 7795 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 7796 | #define elf_backend_add_symbol_hook \ |
351f65ca | 7797 | elf_x86_64_add_symbol_hook |
3b22753a | 7798 | #define elf_backend_symbol_processing \ |
351f65ca | 7799 | elf_x86_64_symbol_processing |
3b22753a | 7800 | #define elf_backend_common_section_index \ |
351f65ca | 7801 | elf_x86_64_common_section_index |
3b22753a | 7802 | #define elf_backend_common_section \ |
351f65ca | 7803 | elf_x86_64_common_section |
3b22753a | 7804 | #define elf_backend_common_definition \ |
351f65ca | 7805 | elf_x86_64_common_definition |
3b22753a | 7806 | #define elf_backend_merge_symbol \ |
351f65ca | 7807 | elf_x86_64_merge_symbol |
3b22753a | 7808 | #define elf_backend_special_sections \ |
351f65ca | 7809 | elf_x86_64_special_sections |
3b22753a | 7810 | #define elf_backend_additional_program_headers \ |
351f65ca | 7811 | elf_x86_64_additional_program_headers |
fdc90cb4 | 7812 | #define elf_backend_hash_symbol \ |
351f65ca | 7813 | elf_x86_64_hash_symbol |
8f79b794 L |
7814 | #define elf_backend_omit_section_dynsym \ |
7815 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
aec6b87e L |
7816 | #define elf_backend_fixup_symbol \ |
7817 | elf_x86_64_fixup_symbol | |
46bed679 L |
7818 | #define elf_backend_parse_gnu_properties \ |
7819 | elf_x86_64_parse_gnu_properties | |
7820 | #define elf_backend_merge_gnu_properties \ | |
7821 | elf_x86_64_merge_gnu_properties | |
38b12349 L |
7822 | #define elf_backend_setup_gnu_properties \ |
7823 | elf_x86_64_link_setup_gnu_properties | |
3b22753a | 7824 | |
8d88c4ca | 7825 | #include "elf64-target.h" |
9d7cbccd | 7826 | |
6036f486 ES |
7827 | /* CloudABI support. */ |
7828 | ||
7829 | #undef TARGET_LITTLE_SYM | |
7830 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec | |
7831 | #undef TARGET_LITTLE_NAME | |
7832 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" | |
7833 | ||
7834 | #undef ELF_OSABI | |
7835 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
7836 | ||
7837 | #undef elf64_bed | |
7838 | #define elf64_bed elf64_x86_64_cloudabi_bed | |
7839 | ||
7840 | #include "elf64-target.h" | |
7841 | ||
9d7cbccd NC |
7842 | /* FreeBSD support. */ |
7843 | ||
7844 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7845 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
9d7cbccd NC |
7846 | #undef TARGET_LITTLE_NAME |
7847 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
7848 | ||
d1036acb L |
7849 | #undef ELF_OSABI |
7850 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 7851 | |
9d7cbccd NC |
7852 | #undef elf64_bed |
7853 | #define elf64_bed elf64_x86_64_fbsd_bed | |
7854 | ||
7855 | #include "elf64-target.h" | |
8a9036a4 | 7856 | |
a6cc6b3b RO |
7857 | /* Solaris 2 support. */ |
7858 | ||
7859 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7860 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
7861 | #undef TARGET_LITTLE_NAME |
7862 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
7863 | ||
7864 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
7865 | objects won't be recognized. */ | |
7866 | #undef ELF_OSABI | |
7867 | ||
7868 | #undef elf64_bed | |
7869 | #define elf64_bed elf64_x86_64_sol2_bed | |
7870 | ||
7dc98aea RO |
7871 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
7872 | boundary. */ | |
84865015 | 7873 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
7874 | #define elf_backend_static_tls_alignment 16 |
7875 | ||
a6cc6b3b RO |
7876 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
7877 | ||
7878 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
7879 | File, p.63. */ | |
84865015 | 7880 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
7881 | #define elf_backend_want_plt_sym 1 |
7882 | ||
84865015 NC |
7883 | #undef elf_backend_strtab_flags |
7884 | #define elf_backend_strtab_flags SHF_STRINGS | |
7885 | ||
7886 | static bfd_boolean | |
5522f910 NC |
7887 | elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
7888 | bfd *obfd ATTRIBUTE_UNUSED, | |
7889 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
7890 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
7891 | { |
7892 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
7893 | and sh_link fields of Solaris specific section types. */ | |
7894 | return FALSE; | |
7895 | } | |
7896 | ||
5522f910 NC |
7897 | #undef elf_backend_copy_special_section_fields |
7898 | #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields | |
84865015 | 7899 | |
a6cc6b3b RO |
7900 | #include "elf64-target.h" |
7901 | ||
8059fb19 RM |
7902 | /* Native Client support. */ |
7903 | ||
64b384e1 RM |
7904 | static bfd_boolean |
7905 | elf64_x86_64_nacl_elf_object_p (bfd *abfd) | |
7906 | { | |
7907 | /* Set the right machine number for a NaCl x86-64 ELF64 file. */ | |
7908 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl); | |
7909 | return TRUE; | |
7910 | } | |
7911 | ||
8059fb19 | 7912 | #undef TARGET_LITTLE_SYM |
6d00b590 | 7913 | #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec |
8059fb19 RM |
7914 | #undef TARGET_LITTLE_NAME |
7915 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
7916 | #undef elf64_bed | |
7917 | #define elf64_bed elf64_x86_64_nacl_bed | |
7918 | ||
7919 | #undef ELF_MAXPAGESIZE | |
7920 | #undef ELF_MINPAGESIZE | |
7921 | #undef ELF_COMMONPAGESIZE | |
7922 | #define ELF_MAXPAGESIZE 0x10000 | |
7923 | #define ELF_MINPAGESIZE 0x10000 | |
7924 | #define ELF_COMMONPAGESIZE 0x10000 | |
7925 | ||
7926 | /* Restore defaults. */ | |
7927 | #undef ELF_OSABI | |
7928 | #undef elf_backend_static_tls_alignment | |
7929 | #undef elf_backend_want_plt_sym | |
7930 | #define elf_backend_want_plt_sym 0 | |
84865015 | 7931 | #undef elf_backend_strtab_flags |
5522f910 | 7932 | #undef elf_backend_copy_special_section_fields |
8059fb19 RM |
7933 | |
7934 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
7935 | ||
7936 | #undef elf_backend_plt_alignment | |
7937 | #define elf_backend_plt_alignment 5 | |
7938 | #define NACL_PLT_ENTRY_SIZE 64 | |
7939 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
7940 | ||
7941 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
7942 | { | |
7943 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
7944 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ | |
7945 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
7946 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
7947 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
7948 | ||
ea2d813e | 7949 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
70cc877f | 7950 | 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */ |
ea2d813e RM |
7951 | |
7952 | /* 32 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 7953 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 7954 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 7955 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 7956 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 7957 | 0x66, /* excess data16 prefix */ |
ea2d813e | 7958 | 0x90 /* nop */ |
8059fb19 RM |
7959 | }; |
7960 | ||
7961 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
7962 | { | |
7963 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
7964 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
7965 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
7966 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
7967 | ||
7968 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
3ddf1bdd | 7969 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
7970 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
7971 | ||
7972 | /* Lazy GOT entries point here (32-byte aligned). */ | |
7973 | 0x68, /* pushq immediate */ | |
7974 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
7975 | 0xe9, /* jmp relative */ | |
7976 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
7977 | ||
7978 | /* 22 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 7979 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
7980 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
7981 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ | |
7982 | }; | |
7983 | ||
7984 | /* .eh_frame covering the .plt section. */ | |
7985 | ||
7986 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
7987 | { | |
7988 | #if (PLT_CIE_LENGTH != 20 \ | |
7989 | || PLT_FDE_LENGTH != 36 \ | |
7990 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
7991 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
7992 | # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!" | |
7993 | #endif | |
7994 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
7995 | 0, 0, 0, 0, /* CIE ID */ | |
7996 | 1, /* CIE version */ | |
7997 | 'z', 'R', 0, /* Augmentation string */ | |
7998 | 1, /* Code alignment factor */ | |
7999 | 0x78, /* Data alignment factor */ | |
8000 | 16, /* Return address column */ | |
8001 | 1, /* Augmentation size */ | |
8002 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
8003 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
8004 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
8005 | DW_CFA_nop, DW_CFA_nop, | |
8006 | ||
8007 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
8008 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
8009 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
8010 | 0, 0, 0, 0, /* .plt size goes here */ | |
8011 | 0, /* Augmentation size */ | |
8012 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
8013 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
8014 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
8015 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
8016 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
8017 | 13, /* Block length */ | |
8018 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
8019 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
8020 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
8021 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
8022 | DW_CFA_nop, DW_CFA_nop | |
8023 | }; | |
8024 | ||
38b12349 | 8025 | static const struct elf_x86_64_lazy_plt_layout elf_x86_64_nacl_plt = |
8059fb19 RM |
8026 | { |
8027 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ | |
8028 | elf_x86_64_nacl_plt_entry, /* plt_entry */ | |
8029 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
8030 | 2, /* plt0_got1_offset */ | |
8031 | 9, /* plt0_got2_offset */ | |
8032 | 13, /* plt0_got2_insn_end */ | |
8033 | 3, /* plt_got_offset */ | |
8034 | 33, /* plt_reloc_offset */ | |
8035 | 38, /* plt_plt_offset */ | |
8036 | 7, /* plt_got_insn_size */ | |
8037 | 42, /* plt_plt_insn_end */ | |
8038 | 32, /* plt_lazy_offset */ | |
8039 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ | |
38b12349 L |
8040 | sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */ |
8041 | }; | |
8042 | ||
8043 | static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed = | |
8044 | { | |
8045 | is_nacl /* os */ | |
8059fb19 RM |
8046 | }; |
8047 | ||
8048 | #undef elf_backend_arch_data | |
8049 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
8050 | ||
64b384e1 RM |
8051 | #undef elf_backend_object_p |
8052 | #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p | |
5a68afcf RM |
8053 | #undef elf_backend_modify_segment_map |
8054 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
8055 | #undef elf_backend_modify_program_headers | |
8056 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
8057 | #undef elf_backend_final_write_processing |
8058 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 8059 | |
8059fb19 RM |
8060 | #include "elf64-target.h" |
8061 | ||
8062 | /* Native Client x32 support. */ | |
8063 | ||
64b384e1 RM |
8064 | static bfd_boolean |
8065 | elf32_x86_64_nacl_elf_object_p (bfd *abfd) | |
8066 | { | |
8067 | /* Set the right machine number for a NaCl x86-64 ELF32 file. */ | |
8068 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl); | |
8069 | return TRUE; | |
8070 | } | |
8071 | ||
8059fb19 | 8072 | #undef TARGET_LITTLE_SYM |
6d00b590 | 8073 | #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec |
8059fb19 RM |
8074 | #undef TARGET_LITTLE_NAME |
8075 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" | |
8076 | #undef elf32_bed | |
8077 | #define elf32_bed elf32_x86_64_nacl_bed | |
8078 | ||
8079 | #define bfd_elf32_bfd_link_hash_table_create \ | |
8080 | elf_x86_64_link_hash_table_create | |
8059fb19 RM |
8081 | #define bfd_elf32_bfd_reloc_type_lookup \ |
8082 | elf_x86_64_reloc_type_lookup | |
8083 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
8084 | elf_x86_64_reloc_name_lookup | |
8085 | #define bfd_elf32_mkobject \ | |
8086 | elf_x86_64_mkobject | |
b7365e5d L |
8087 | #define bfd_elf32_get_synthetic_symtab \ |
8088 | elf_x86_64_get_synthetic_symtab | |
1d4af308 L |
8089 | #define bfd_elf32_bfd_link_check_relocs \ |
8090 | elf_x86_64_link_check_relocs | |
8059fb19 RM |
8091 | |
8092 | #undef elf_backend_object_p | |
8093 | #define elf_backend_object_p \ | |
64b384e1 | 8094 | elf32_x86_64_nacl_elf_object_p |
8059fb19 RM |
8095 | |
8096 | #undef elf_backend_bfd_from_remote_memory | |
8097 | #define elf_backend_bfd_from_remote_memory \ | |
8098 | _bfd_elf32_bfd_from_remote_memory | |
8099 | ||
8100 | #undef elf_backend_size_info | |
8101 | #define elf_backend_size_info \ | |
8102 | _bfd_elf32_size_info | |
8103 | ||
8104 | #include "elf32-target.h" | |
8105 | ||
8106 | /* Restore defaults. */ | |
5a68afcf | 8107 | #undef elf_backend_object_p |
8059fb19 | 8108 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
8109 | #undef elf_backend_bfd_from_remote_memory |
8110 | #undef elf_backend_size_info | |
8111 | #undef elf_backend_modify_segment_map | |
8112 | #undef elf_backend_modify_program_headers | |
887badb3 | 8113 | #undef elf_backend_final_write_processing |
8059fb19 | 8114 | |
8a9036a4 L |
8115 | /* Intel L1OM support. */ |
8116 | ||
8117 | static bfd_boolean | |
8118 | elf64_l1om_elf_object_p (bfd *abfd) | |
8119 | { | |
8120 | /* Set the right machine number for an L1OM elf64 file. */ | |
8121 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
8122 | return TRUE; | |
8123 | } | |
8124 | ||
8125 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 8126 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
8127 | #undef TARGET_LITTLE_NAME |
8128 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
8129 | #undef ELF_ARCH | |
8130 | #define ELF_ARCH bfd_arch_l1om | |
8131 | ||
8132 | #undef ELF_MACHINE_CODE | |
8133 | #define ELF_MACHINE_CODE EM_L1OM | |
8134 | ||
8135 | #undef ELF_OSABI | |
8136 | ||
8137 | #undef elf64_bed | |
8138 | #define elf64_bed elf64_l1om_bed | |
8139 | ||
8140 | #undef elf_backend_object_p | |
8141 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
8142 | ||
8059fb19 RM |
8143 | /* Restore defaults. */ |
8144 | #undef ELF_MAXPAGESIZE | |
8145 | #undef ELF_MINPAGESIZE | |
8146 | #undef ELF_COMMONPAGESIZE | |
8147 | #define ELF_MAXPAGESIZE 0x200000 | |
8148 | #define ELF_MINPAGESIZE 0x1000 | |
8149 | #define ELF_COMMONPAGESIZE 0x1000 | |
8150 | #undef elf_backend_plt_alignment | |
8151 | #define elf_backend_plt_alignment 4 | |
8152 | #undef elf_backend_arch_data | |
8153 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 8154 | |
8a9036a4 L |
8155 | #include "elf64-target.h" |
8156 | ||
8157 | /* FreeBSD L1OM support. */ | |
8158 | ||
8159 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 8160 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
8161 | #undef TARGET_LITTLE_NAME |
8162 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
8163 | ||
8164 | #undef ELF_OSABI | |
8165 | #define ELF_OSABI ELFOSABI_FREEBSD | |
8166 | ||
8167 | #undef elf64_bed | |
8168 | #define elf64_bed elf64_l1om_fbsd_bed | |
8169 | ||
8a9036a4 | 8170 | #include "elf64-target.h" |
351f65ca | 8171 | |
7a9068fe L |
8172 | /* Intel K1OM support. */ |
8173 | ||
8174 | static bfd_boolean | |
8175 | elf64_k1om_elf_object_p (bfd *abfd) | |
8176 | { | |
8177 | /* Set the right machine number for an K1OM elf64 file. */ | |
8178 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
8179 | return TRUE; | |
8180 | } | |
8181 | ||
8182 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 8183 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
8184 | #undef TARGET_LITTLE_NAME |
8185 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
8186 | #undef ELF_ARCH | |
8187 | #define ELF_ARCH bfd_arch_k1om | |
8188 | ||
8189 | #undef ELF_MACHINE_CODE | |
8190 | #define ELF_MACHINE_CODE EM_K1OM | |
8191 | ||
8192 | #undef ELF_OSABI | |
8193 | ||
8194 | #undef elf64_bed | |
8195 | #define elf64_bed elf64_k1om_bed | |
8196 | ||
8197 | #undef elf_backend_object_p | |
8198 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
8199 | ||
8200 | #undef elf_backend_static_tls_alignment | |
8201 | ||
8202 | #undef elf_backend_want_plt_sym | |
8203 | #define elf_backend_want_plt_sym 0 | |
8204 | ||
8205 | #include "elf64-target.h" | |
8206 | ||
8207 | /* FreeBSD K1OM support. */ | |
8208 | ||
8209 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 8210 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
8211 | #undef TARGET_LITTLE_NAME |
8212 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
8213 | ||
8214 | #undef ELF_OSABI | |
8215 | #define ELF_OSABI ELFOSABI_FREEBSD | |
8216 | ||
8217 | #undef elf64_bed | |
8218 | #define elf64_bed elf64_k1om_fbsd_bed | |
8219 | ||
8220 | #include "elf64-target.h" | |
8221 | ||
351f65ca L |
8222 | /* 32bit x86-64 support. */ |
8223 | ||
351f65ca | 8224 | #undef TARGET_LITTLE_SYM |
6d00b590 | 8225 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
8226 | #undef TARGET_LITTLE_NAME |
8227 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 8228 | #undef elf32_bed |
351f65ca L |
8229 | |
8230 | #undef ELF_ARCH | |
8231 | #define ELF_ARCH bfd_arch_i386 | |
8232 | ||
8233 | #undef ELF_MACHINE_CODE | |
8234 | #define ELF_MACHINE_CODE EM_X86_64 | |
8235 | ||
351f65ca L |
8236 | #undef ELF_OSABI |
8237 | ||
351f65ca L |
8238 | #undef elf_backend_object_p |
8239 | #define elf_backend_object_p \ | |
8240 | elf32_x86_64_elf_object_p | |
8241 | ||
8242 | #undef elf_backend_bfd_from_remote_memory | |
8243 | #define elf_backend_bfd_from_remote_memory \ | |
8244 | _bfd_elf32_bfd_from_remote_memory | |
8245 | ||
8246 | #undef elf_backend_size_info | |
8247 | #define elf_backend_size_info \ | |
8248 | _bfd_elf32_size_info | |
8249 | ||
8250 | #include "elf32-target.h" |