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