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351f65ca | 1 | /* X86-64 specific support for ELF |
6f2750fe | 2 | Copyright (C) 2000-2016 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 | { | |
288 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), | |
289 | abfd, (int) r_type); | |
290 | r_type = R_X86_64_NONE; | |
291 | } | |
292 | i = r_type; | |
293 | } | |
294 | else | |
295 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
296 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
297 | return &x86_64_elf_howto_table[i]; | |
298 | } | |
8d88c4ca NC |
299 | |
300 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
301 | static reloc_howto_type * | |
351f65ca L |
302 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
303 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
304 | { |
305 | unsigned int i; | |
27482721 | 306 | |
8d88c4ca NC |
307 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
308 | i++) | |
309 | { | |
310 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
311 | return elf_x86_64_rtype_to_howto (abfd, |
312 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca | 313 | } |
5860e3f8 | 314 | return NULL; |
8d88c4ca NC |
315 | } |
316 | ||
157090f7 | 317 | static reloc_howto_type * |
d7921315 | 318 | elf_x86_64_reloc_name_lookup (bfd *abfd, |
351f65ca | 319 | const char *r_name) |
157090f7 AM |
320 | { |
321 | unsigned int i; | |
322 | ||
d7921315 L |
323 | if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0) |
324 | { | |
325 | /* Get x32 R_X86_64_32. */ | |
326 | reloc_howto_type *reloc | |
327 | = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1]; | |
328 | BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32); | |
329 | return reloc; | |
330 | } | |
331 | ||
332 | for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++) | |
157090f7 AM |
333 | if (x86_64_elf_howto_table[i].name != NULL |
334 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
335 | return &x86_64_elf_howto_table[i]; | |
336 | ||
337 | return NULL; | |
338 | } | |
339 | ||
8d88c4ca | 340 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 341 | |
8d88c4ca | 342 | static void |
351f65ca L |
343 | elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
344 | Elf_Internal_Rela *dst) | |
8d88c4ca | 345 | { |
67a4f2b7 | 346 | unsigned r_type; |
8d88c4ca | 347 | |
351f65ca L |
348 | r_type = ELF32_R_TYPE (dst->r_info); |
349 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); | |
8d88c4ca NC |
350 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
351 | } | |
70256ad8 | 352 | \f |
3bab7989 | 353 | /* Support for core dump NOTE sections. */ |
b34976b6 | 354 | static bfd_boolean |
351f65ca | 355 | elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
356 | { |
357 | int offset; | |
eea6121a | 358 | size_t size; |
3bab7989 ML |
359 | |
360 | switch (note->descsz) | |
361 | { | |
362 | default: | |
b34976b6 | 363 | return FALSE; |
3bab7989 | 364 | |
bcd823f1 L |
365 | case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */ |
366 | /* pr_cursig */ | |
228e534f | 367 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
bcd823f1 L |
368 | |
369 | /* pr_pid */ | |
228e534f | 370 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
bcd823f1 L |
371 | |
372 | /* pr_reg */ | |
373 | offset = 72; | |
374 | size = 216; | |
375 | ||
376 | break; | |
377 | ||
3bab7989 ML |
378 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ |
379 | /* pr_cursig */ | |
228e534f | 380 | elf_tdata (abfd)->core->signal |
3bab7989 ML |
381 | = bfd_get_16 (abfd, note->descdata + 12); |
382 | ||
383 | /* pr_pid */ | |
228e534f | 384 | elf_tdata (abfd)->core->lwpid |
3bab7989 ML |
385 | = bfd_get_32 (abfd, note->descdata + 32); |
386 | ||
387 | /* pr_reg */ | |
388 | offset = 112; | |
eea6121a | 389 | size = 216; |
3bab7989 ML |
390 | |
391 | break; | |
392 | } | |
393 | ||
394 | /* Make a ".reg/999" section. */ | |
395 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 396 | size, note->descpos + offset); |
3bab7989 ML |
397 | } |
398 | ||
b34976b6 | 399 | static bfd_boolean |
351f65ca | 400 | elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
401 | { |
402 | switch (note->descsz) | |
403 | { | |
404 | default: | |
b34976b6 | 405 | return FALSE; |
3bab7989 | 406 | |
bcd823f1 | 407 | case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */ |
228e534f | 408 | elf_tdata (abfd)->core->pid |
bcd823f1 | 409 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 410 | elf_tdata (abfd)->core->program |
bcd823f1 | 411 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 412 | elf_tdata (abfd)->core->command |
bcd823f1 L |
413 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
414 | break; | |
415 | ||
3bab7989 | 416 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ |
228e534f | 417 | elf_tdata (abfd)->core->pid |
261b8d08 | 418 | = bfd_get_32 (abfd, note->descdata + 24); |
228e534f | 419 | elf_tdata (abfd)->core->program |
3bab7989 | 420 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
228e534f | 421 | elf_tdata (abfd)->core->command |
3bab7989 ML |
422 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
423 | } | |
424 | ||
425 | /* Note that for some reason, a spurious space is tacked | |
426 | onto the end of the args in some (at least one anyway) | |
427 | implementations, so strip it off if it exists. */ | |
428 | ||
429 | { | |
228e534f | 430 | char *command = elf_tdata (abfd)->core->command; |
3bab7989 ML |
431 | int n = strlen (command); |
432 | ||
433 | if (0 < n && command[n - 1] == ' ') | |
434 | command[n - 1] = '\0'; | |
435 | } | |
436 | ||
b34976b6 | 437 | return TRUE; |
3bab7989 | 438 | } |
8fd79e71 L |
439 | |
440 | #ifdef CORE_HEADER | |
441 | static char * | |
442 | elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz, | |
443 | int note_type, ...) | |
444 | { | |
445 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8fd79e71 L |
446 | va_list ap; |
447 | const char *fname, *psargs; | |
448 | long pid; | |
449 | int cursig; | |
450 | const void *gregs; | |
451 | ||
452 | switch (note_type) | |
453 | { | |
454 | default: | |
455 | return NULL; | |
456 | ||
457 | case NT_PRPSINFO: | |
458 | va_start (ap, note_type); | |
459 | fname = va_arg (ap, const char *); | |
460 | psargs = va_arg (ap, const char *); | |
461 | va_end (ap); | |
462 | ||
463 | if (bed->s->elfclass == ELFCLASS32) | |
464 | { | |
465 | prpsinfo32_t data; | |
466 | memset (&data, 0, sizeof (data)); | |
467 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
468 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
469 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
470 | &data, sizeof (data)); | |
8fd79e71 L |
471 | } |
472 | else | |
473 | { | |
b1bd052d | 474 | prpsinfo64_t data; |
8fd79e71 L |
475 | memset (&data, 0, sizeof (data)); |
476 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
477 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
478 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
479 | &data, sizeof (data)); | |
8fd79e71 | 480 | } |
e85c6a70 | 481 | /* NOTREACHED */ |
8fd79e71 L |
482 | |
483 | case NT_PRSTATUS: | |
484 | va_start (ap, note_type); | |
485 | pid = va_arg (ap, long); | |
486 | cursig = va_arg (ap, int); | |
487 | gregs = va_arg (ap, const void *); | |
488 | va_end (ap); | |
489 | ||
490 | if (bed->s->elfclass == ELFCLASS32) | |
491 | { | |
492 | if (bed->elf_machine_code == EM_X86_64) | |
493 | { | |
494 | prstatusx32_t prstat; | |
495 | memset (&prstat, 0, sizeof (prstat)); | |
496 | prstat.pr_pid = pid; | |
497 | prstat.pr_cursig = cursig; | |
498 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
499 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
500 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
501 | } |
502 | else | |
503 | { | |
504 | prstatus32_t prstat; | |
505 | memset (&prstat, 0, sizeof (prstat)); | |
506 | prstat.pr_pid = pid; | |
507 | prstat.pr_cursig = cursig; | |
508 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
509 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
510 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
511 | } |
512 | } | |
513 | else | |
514 | { | |
b1bd052d | 515 | prstatus64_t prstat; |
8fd79e71 L |
516 | memset (&prstat, 0, sizeof (prstat)); |
517 | prstat.pr_pid = pid; | |
518 | prstat.pr_cursig = cursig; | |
519 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
520 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
521 | &prstat, sizeof (prstat)); | |
8fd79e71 | 522 | } |
8fd79e71 | 523 | } |
e85c6a70 | 524 | /* NOTREACHED */ |
8fd79e71 L |
525 | } |
526 | #endif | |
3bab7989 | 527 | \f |
407443a3 | 528 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 529 | |
407443a3 | 530 | /* The name of the dynamic interpreter. This is put in the .interp |
70256ad8 AJ |
531 | section. */ |
532 | ||
351f65ca | 533 | #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
eec9dd95 | 534 | #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1" |
70256ad8 | 535 | |
d40d037c AJ |
536 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
537 | copying dynamic variables from a shared lib into an app's dynbss | |
538 | section, and instead use a dynamic relocation to point into the | |
539 | shared lib. */ | |
540 | #define ELIMINATE_COPY_RELOCS 1 | |
541 | ||
70256ad8 AJ |
542 | /* The size in bytes of an entry in the global offset table. */ |
543 | ||
544 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 545 | |
70256ad8 | 546 | /* The size in bytes of an entry in the procedure linkage table. */ |
8d88c4ca | 547 | |
70256ad8 AJ |
548 | #define PLT_ENTRY_SIZE 16 |
549 | ||
550 | /* The first entry in a procedure linkage table looks like this. See the | |
551 | SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */ | |
552 | ||
351f65ca | 553 | static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] = |
70256ad8 | 554 | { |
653165cc AJ |
555 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
556 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 557 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
558 | }; |
559 | ||
560 | /* Subsequent entries in a procedure linkage table look like this. */ | |
561 | ||
351f65ca | 562 | static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] = |
70256ad8 | 563 | { |
653165cc | 564 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 565 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 566 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
567 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
568 | 0xe9, /* jmp relative */ | |
569 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
570 | }; | |
571 | ||
0ff2b86e L |
572 | /* The first entry in a procedure linkage table with BND relocations |
573 | like this. */ | |
574 | ||
575 | static const bfd_byte elf_x86_64_bnd_plt0_entry[PLT_ENTRY_SIZE] = | |
576 | { | |
577 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
578 | 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */ | |
579 | 0x0f, 0x1f, 0 /* nopl (%rax) */ | |
580 | }; | |
581 | ||
582 | /* Subsequent entries for legacy branches in a procedure linkage table | |
583 | with BND relocations look like this. */ | |
584 | ||
585 | static const bfd_byte elf_x86_64_legacy_plt_entry[PLT_ENTRY_SIZE] = | |
586 | { | |
587 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
588 | 0xe9, 0, 0, 0, 0, /* jmpq relative */ | |
589 | 0x66, 0x0f, 0x1f, 0x44, 0, 0 /* nopw (%rax,%rax,1) */ | |
590 | }; | |
591 | ||
592 | /* Subsequent entries for branches with BND prefx in a procedure linkage | |
593 | table with BND relocations look like this. */ | |
594 | ||
595 | static const bfd_byte elf_x86_64_bnd_plt_entry[PLT_ENTRY_SIZE] = | |
596 | { | |
597 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
598 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
599 | 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */ | |
600 | }; | |
601 | ||
602 | /* Entries for legacy branches in the second procedure linkage table | |
603 | look like this. */ | |
604 | ||
605 | static const bfd_byte elf_x86_64_legacy_plt2_entry[8] = | |
606 | { | |
607 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ | |
608 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
609 | 0x66, 0x90 /* xchg %ax,%ax */ | |
610 | }; | |
611 | ||
612 | /* Entries for branches with BND prefix in the second procedure linkage | |
613 | table look like this. */ | |
614 | ||
615 | static const bfd_byte elf_x86_64_bnd_plt2_entry[8] = | |
616 | { | |
617 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ | |
618 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
619 | 0x90 /* nop */ | |
620 | }; | |
621 | ||
e41b3a13 JJ |
622 | /* .eh_frame covering the .plt section. */ |
623 | ||
624 | static const bfd_byte elf_x86_64_eh_frame_plt[] = | |
625 | { | |
626 | #define PLT_CIE_LENGTH 20 | |
627 | #define PLT_FDE_LENGTH 36 | |
628 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
629 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
630 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
631 | 0, 0, 0, 0, /* CIE ID */ | |
632 | 1, /* CIE version */ | |
633 | 'z', 'R', 0, /* Augmentation string */ | |
634 | 1, /* Code alignment factor */ | |
635 | 0x78, /* Data alignment factor */ | |
636 | 16, /* Return address column */ | |
637 | 1, /* Augmentation size */ | |
638 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
639 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
640 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
641 | DW_CFA_nop, DW_CFA_nop, | |
642 | ||
643 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
644 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
645 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
646 | 0, 0, 0, 0, /* .plt size goes here */ | |
647 | 0, /* Augmentation size */ | |
648 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
649 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
650 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
651 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
652 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
653 | 11, /* Block length */ | |
654 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
655 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
656 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
657 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
658 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
659 | }; | |
660 | ||
eed180f8 RM |
661 | /* Architecture-specific backend data for x86-64. */ |
662 | ||
663 | struct elf_x86_64_backend_data | |
664 | { | |
665 | /* Templates for the initial PLT entry and for subsequent entries. */ | |
666 | const bfd_byte *plt0_entry; | |
667 | const bfd_byte *plt_entry; | |
668 | unsigned int plt_entry_size; /* Size of each PLT entry. */ | |
669 | ||
670 | /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */ | |
671 | unsigned int plt0_got1_offset; | |
672 | unsigned int plt0_got2_offset; | |
673 | ||
674 | /* Offset of the end of the PC-relative instruction containing | |
675 | plt0_got2_offset. */ | |
676 | unsigned int plt0_got2_insn_end; | |
677 | ||
678 | /* Offsets into plt_entry that are to be replaced with... */ | |
679 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
680 | unsigned int plt_reloc_offset; /* ... offset into relocation table. */ | |
681 | unsigned int plt_plt_offset; /* ... offset to start of .plt. */ | |
682 | ||
683 | /* Length of the PC-relative instruction containing plt_got_offset. */ | |
684 | unsigned int plt_got_insn_size; | |
685 | ||
686 | /* Offset of the end of the PC-relative jump to plt0_entry. */ | |
687 | unsigned int plt_plt_insn_end; | |
688 | ||
689 | /* Offset into plt_entry where the initial value of the GOT entry points. */ | |
690 | unsigned int plt_lazy_offset; | |
691 | ||
692 | /* .eh_frame covering the .plt section. */ | |
693 | const bfd_byte *eh_frame_plt; | |
694 | unsigned int eh_frame_plt_size; | |
695 | }; | |
696 | ||
f8222080 L |
697 | #define get_elf_x86_64_arch_data(bed) \ |
698 | ((const struct elf_x86_64_backend_data *) (bed)->arch_data) | |
699 | ||
eed180f8 | 700 | #define get_elf_x86_64_backend_data(abfd) \ |
f8222080 | 701 | get_elf_x86_64_arch_data (get_elf_backend_data (abfd)) |
eed180f8 RM |
702 | |
703 | #define GET_PLT_ENTRY_SIZE(abfd) \ | |
704 | get_elf_x86_64_backend_data (abfd)->plt_entry_size | |
705 | ||
706 | /* These are the standard parameters. */ | |
707 | static const struct elf_x86_64_backend_data elf_x86_64_arch_bed = | |
708 | { | |
709 | elf_x86_64_plt0_entry, /* plt0_entry */ | |
710 | elf_x86_64_plt_entry, /* plt_entry */ | |
711 | sizeof (elf_x86_64_plt_entry), /* plt_entry_size */ | |
712 | 2, /* plt0_got1_offset */ | |
713 | 8, /* plt0_got2_offset */ | |
714 | 12, /* plt0_got2_insn_end */ | |
715 | 2, /* plt_got_offset */ | |
716 | 7, /* plt_reloc_offset */ | |
717 | 12, /* plt_plt_offset */ | |
718 | 6, /* plt_got_insn_size */ | |
719 | PLT_ENTRY_SIZE, /* plt_plt_insn_end */ | |
720 | 6, /* plt_lazy_offset */ | |
721 | elf_x86_64_eh_frame_plt, /* eh_frame_plt */ | |
722 | sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */ | |
723 | }; | |
724 | ||
0ff2b86e L |
725 | static const struct elf_x86_64_backend_data elf_x86_64_bnd_arch_bed = |
726 | { | |
727 | elf_x86_64_bnd_plt0_entry, /* plt0_entry */ | |
728 | elf_x86_64_bnd_plt_entry, /* plt_entry */ | |
729 | sizeof (elf_x86_64_bnd_plt_entry), /* plt_entry_size */ | |
730 | 2, /* plt0_got1_offset */ | |
731 | 1+8, /* plt0_got2_offset */ | |
732 | 1+12, /* plt0_got2_insn_end */ | |
733 | 1+2, /* plt_got_offset */ | |
734 | 1, /* plt_reloc_offset */ | |
735 | 7, /* plt_plt_offset */ | |
736 | 1+6, /* plt_got_insn_size */ | |
737 | 11, /* plt_plt_insn_end */ | |
738 | 0, /* plt_lazy_offset */ | |
739 | elf_x86_64_eh_frame_plt, /* eh_frame_plt */ | |
740 | sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */ | |
741 | }; | |
742 | ||
eed180f8 RM |
743 | #define elf_backend_arch_data &elf_x86_64_arch_bed |
744 | ||
aec6b87e L |
745 | /* Is a undefined weak symbol which is resolved to 0. Reference to an |
746 | undefined weak symbol is resolved to 0 when building executable if | |
747 | it isn't dynamic and | |
748 | 1. Has non-GOT/non-PLT relocations in text section. Or | |
749 | 2. Has no GOT/PLT relocation. | |
750 | */ | |
751 | #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, EH) \ | |
752 | ((EH)->elf.root.type == bfd_link_hash_undefweak \ | |
753 | && bfd_link_executable (INFO) \ | |
754 | && (elf_x86_64_hash_table (INFO)->interp == NULL \ | |
755 | || !(EH)->has_got_reloc \ | |
756 | || (EH)->has_non_got_reloc \ | |
757 | || !(INFO)->dynamic_undefined_weak)) | |
758 | ||
70256ad8 AJ |
759 | /* x86-64 ELF linker hash entry. */ |
760 | ||
351f65ca | 761 | struct elf_x86_64_link_hash_entry |
70256ad8 | 762 | { |
c434dee6 | 763 | struct elf_link_hash_entry elf; |
70256ad8 | 764 | |
c434dee6 | 765 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 766 | struct elf_dyn_relocs *dyn_relocs; |
bffbf940 JJ |
767 | |
768 | #define GOT_UNKNOWN 0 | |
769 | #define GOT_NORMAL 1 | |
770 | #define GOT_TLS_GD 2 | |
771 | #define GOT_TLS_IE 3 | |
67a4f2b7 AO |
772 | #define GOT_TLS_GDESC 4 |
773 | #define GOT_TLS_GD_BOTH_P(type) \ | |
774 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
775 | #define GOT_TLS_GD_P(type) \ | |
776 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
777 | #define GOT_TLS_GDESC_P(type) \ | |
778 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
779 | #define GOT_TLS_GD_ANY_P(type) \ | |
780 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
bffbf940 | 781 | unsigned char tls_type; |
67a4f2b7 | 782 | |
bc696fd5 L |
783 | /* TRUE if a weak symbol with a real definition needs a copy reloc. |
784 | When there is a weak symbol with a real definition, the processor | |
785 | independent code will have arranged for us to see the real | |
786 | definition first. We need to copy the needs_copy bit from the | |
787 | real definition and check it when allowing copy reloc in PIE. */ | |
788 | unsigned int needs_copy : 1; | |
789 | ||
0ff2b86e | 790 | /* TRUE if symbol has at least one BND relocation. */ |
bc696fd5 | 791 | unsigned int has_bnd_reloc : 1; |
0ff2b86e | 792 | |
aec6b87e L |
793 | /* TRUE if symbol has GOT or PLT relocations. */ |
794 | unsigned int has_got_reloc : 1; | |
795 | ||
796 | /* TRUE if symbol has non-GOT/non-PLT relocations in text sections. */ | |
797 | unsigned int has_non_got_reloc : 1; | |
798 | ||
04ebc307 L |
799 | /* Reference count of C/C++ function pointer relocations in read-write |
800 | section which can be resolved at run-time. */ | |
801 | bfd_signed_vma func_pointer_refcount; | |
802 | ||
dd7e64d4 L |
803 | /* Information about the GOT PLT entry. Filled when there are both |
804 | GOT and PLT relocations against the same function. */ | |
805 | union gotplt_union plt_got; | |
806 | ||
0ff2b86e L |
807 | /* Information about the second PLT entry. Filled when has_bnd_reloc is |
808 | set. */ | |
809 | union gotplt_union plt_bnd; | |
810 | ||
67a4f2b7 AO |
811 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, |
812 | starting at the end of the jump table. */ | |
813 | bfd_vma tlsdesc_got; | |
bffbf940 JJ |
814 | }; |
815 | ||
351f65ca L |
816 | #define elf_x86_64_hash_entry(ent) \ |
817 | ((struct elf_x86_64_link_hash_entry *)(ent)) | |
bffbf940 | 818 | |
351f65ca | 819 | struct elf_x86_64_obj_tdata |
bffbf940 JJ |
820 | { |
821 | struct elf_obj_tdata root; | |
822 | ||
823 | /* tls_type for each local got entry. */ | |
824 | char *local_got_tls_type; | |
67a4f2b7 AO |
825 | |
826 | /* GOTPLT entries for TLS descriptors. */ | |
827 | bfd_vma *local_tlsdesc_gotent; | |
70256ad8 AJ |
828 | }; |
829 | ||
351f65ca L |
830 | #define elf_x86_64_tdata(abfd) \ |
831 | ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any) | |
bffbf940 | 832 | |
351f65ca L |
833 | #define elf_x86_64_local_got_tls_type(abfd) \ |
834 | (elf_x86_64_tdata (abfd)->local_got_tls_type) | |
bffbf940 | 835 | |
351f65ca L |
836 | #define elf_x86_64_local_tlsdesc_gotent(abfd) \ |
837 | (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent) | |
bffbf940 | 838 | |
0ffa91dd NC |
839 | #define is_x86_64_elf(bfd) \ |
840 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
841 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 842 | && elf_object_id (bfd) == X86_64_ELF_DATA) |
0ffa91dd NC |
843 | |
844 | static bfd_boolean | |
351f65ca | 845 | elf_x86_64_mkobject (bfd *abfd) |
0ffa91dd | 846 | { |
351f65ca | 847 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata), |
4dfe6ac6 | 848 | X86_64_ELF_DATA); |
0ffa91dd NC |
849 | } |
850 | ||
c434dee6 | 851 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 852 | |
351f65ca | 853 | struct elf_x86_64_link_hash_table |
407443a3 | 854 | { |
c434dee6 | 855 | struct elf_link_hash_table elf; |
70256ad8 | 856 | |
c434dee6 | 857 | /* Short-cuts to get to dynamic linker sections. */ |
aec6b87e | 858 | asection *interp; |
c434dee6 AJ |
859 | asection *sdynbss; |
860 | asection *srelbss; | |
e41b3a13 | 861 | asection *plt_eh_frame; |
0ff2b86e | 862 | asection *plt_bnd; |
dd7e64d4 | 863 | asection *plt_got; |
70256ad8 | 864 | |
4dfe6ac6 NC |
865 | union |
866 | { | |
bffbf940 JJ |
867 | bfd_signed_vma refcount; |
868 | bfd_vma offset; | |
869 | } tls_ld_got; | |
870 | ||
67a4f2b7 AO |
871 | /* The amount of space used by the jump slots in the GOT. */ |
872 | bfd_vma sgotplt_jump_table_size; | |
873 | ||
87d72d41 AM |
874 | /* Small local sym cache. */ |
875 | struct sym_cache sym_cache; | |
9f03412a | 876 | |
351f65ca L |
877 | bfd_vma (*r_info) (bfd_vma, bfd_vma); |
878 | bfd_vma (*r_sym) (bfd_vma); | |
248775ba | 879 | unsigned int pointer_r_type; |
351f65ca L |
880 | const char *dynamic_interpreter; |
881 | int dynamic_interpreter_size; | |
882 | ||
9f03412a AO |
883 | /* _TLS_MODULE_BASE_ symbol. */ |
884 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
885 | |
886 | /* Used by local STT_GNU_IFUNC symbols. */ | |
887 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
888 | void * loc_hash_memory; |
889 | ||
890 | /* The offset into splt of the PLT entry for the TLS descriptor | |
891 | resolver. Special values are 0, if not necessary (or not found | |
892 | to be necessary yet), and -1 if needed but not determined | |
893 | yet. */ | |
894 | bfd_vma tlsdesc_plt; | |
895 | /* The offset into sgot of the GOT entry used by the PLT entry | |
896 | above. */ | |
897 | bfd_vma tlsdesc_got; | |
e1f98742 L |
898 | |
899 | /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */ | |
900 | bfd_vma next_jump_slot_index; | |
901 | /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */ | |
902 | bfd_vma next_irelative_index; | |
2df3368d L |
903 | |
904 | /* TRUE if there are dynamic relocs against IFUNC symbols that apply | |
905 | to read-only sections. */ | |
906 | bfd_boolean readonly_dynrelocs_against_ifunc; | |
c434dee6 | 907 | }; |
70256ad8 AJ |
908 | |
909 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca | 910 | |
351f65ca | 911 | #define elf_x86_64_hash_table(p) \ |
4dfe6ac6 | 912 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
351f65ca | 913 | == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL) |
8d88c4ca | 914 | |
351f65ca | 915 | #define elf_x86_64_compute_jump_table_size(htab) \ |
6de2ae4a | 916 | ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE) |
67a4f2b7 | 917 | |
407443a3 | 918 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
919 | |
920 | static struct bfd_hash_entry * | |
351f65ca L |
921 | elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry, |
922 | struct bfd_hash_table *table, | |
923 | const char *string) | |
70256ad8 | 924 | { |
70256ad8 | 925 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
926 | subclass. */ |
927 | if (entry == NULL) | |
928 | { | |
a50b1753 | 929 | entry = (struct bfd_hash_entry *) |
eed180f8 RM |
930 | bfd_hash_allocate (table, |
931 | sizeof (struct elf_x86_64_link_hash_entry)); | |
c434dee6 AJ |
932 | if (entry == NULL) |
933 | return entry; | |
934 | } | |
70256ad8 AJ |
935 | |
936 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
937 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
938 | if (entry != NULL) | |
70256ad8 | 939 | { |
351f65ca | 940 | struct elf_x86_64_link_hash_entry *eh; |
c434dee6 | 941 | |
351f65ca | 942 | eh = (struct elf_x86_64_link_hash_entry *) entry; |
c434dee6 | 943 | eh->dyn_relocs = NULL; |
bffbf940 | 944 | eh->tls_type = GOT_UNKNOWN; |
bc696fd5 L |
945 | eh->needs_copy = 0; |
946 | eh->has_bnd_reloc = 0; | |
aec6b87e L |
947 | eh->has_got_reloc = 0; |
948 | eh->has_non_got_reloc = 0; | |
04ebc307 | 949 | eh->func_pointer_refcount = 0; |
0ff2b86e | 950 | eh->plt_bnd.offset = (bfd_vma) -1; |
dd7e64d4 | 951 | eh->plt_got.offset = (bfd_vma) -1; |
67a4f2b7 | 952 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
953 | } |
954 | ||
c434dee6 | 955 | return entry; |
70256ad8 AJ |
956 | } |
957 | ||
c25bc9fc L |
958 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
959 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
960 | as global symbol. We reuse indx and dynstr_index for local symbol | |
961 | hash since they aren't used by global symbols in this backend. */ | |
962 | ||
963 | static hashval_t | |
351f65ca | 964 | elf_x86_64_local_htab_hash (const void *ptr) |
c25bc9fc L |
965 | { |
966 | struct elf_link_hash_entry *h | |
967 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 968 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
969 | } |
970 | ||
971 | /* Compare local hash entries. */ | |
972 | ||
973 | static int | |
351f65ca | 974 | elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2) |
c25bc9fc L |
975 | { |
976 | struct elf_link_hash_entry *h1 | |
977 | = (struct elf_link_hash_entry *) ptr1; | |
978 | struct elf_link_hash_entry *h2 | |
979 | = (struct elf_link_hash_entry *) ptr2; | |
980 | ||
981 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
982 | } | |
983 | ||
984 | /* Find and/or create a hash entry for local symbol. */ | |
985 | ||
986 | static struct elf_link_hash_entry * | |
351f65ca L |
987 | elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab, |
988 | bfd *abfd, const Elf_Internal_Rela *rel, | |
989 | bfd_boolean create) | |
c25bc9fc | 990 | { |
351f65ca | 991 | struct elf_x86_64_link_hash_entry e, *ret; |
c25bc9fc | 992 | asection *sec = abfd->sections; |
d2149d72 | 993 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
351f65ca | 994 | htab->r_sym (rel->r_info)); |
c25bc9fc L |
995 | void **slot; |
996 | ||
997 | e.elf.indx = sec->id; | |
351f65ca | 998 | e.elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc L |
999 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, |
1000 | create ? INSERT : NO_INSERT); | |
1001 | ||
1002 | if (!slot) | |
1003 | return NULL; | |
1004 | ||
1005 | if (*slot) | |
1006 | { | |
351f65ca | 1007 | ret = (struct elf_x86_64_link_hash_entry *) *slot; |
c25bc9fc L |
1008 | return &ret->elf; |
1009 | } | |
1010 | ||
351f65ca | 1011 | ret = (struct elf_x86_64_link_hash_entry *) |
c25bc9fc | 1012 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, |
351f65ca | 1013 | sizeof (struct elf_x86_64_link_hash_entry)); |
c25bc9fc L |
1014 | if (ret) |
1015 | { | |
1016 | memset (ret, 0, sizeof (*ret)); | |
1017 | ret->elf.indx = sec->id; | |
351f65ca | 1018 | ret->elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc | 1019 | ret->elf.dynindx = -1; |
04ebc307 | 1020 | ret->func_pointer_refcount = 0; |
dd7e64d4 | 1021 | ret->plt_got.offset = (bfd_vma) -1; |
c25bc9fc L |
1022 | *slot = ret; |
1023 | } | |
1024 | return &ret->elf; | |
1025 | } | |
1026 | ||
68faa637 AM |
1027 | /* Destroy an X86-64 ELF linker hash table. */ |
1028 | ||
1029 | static void | |
d495ab0d | 1030 | elf_x86_64_link_hash_table_free (bfd *obfd) |
68faa637 AM |
1031 | { |
1032 | struct elf_x86_64_link_hash_table *htab | |
d495ab0d | 1033 | = (struct elf_x86_64_link_hash_table *) obfd->link.hash; |
68faa637 AM |
1034 | |
1035 | if (htab->loc_hash_table) | |
1036 | htab_delete (htab->loc_hash_table); | |
1037 | if (htab->loc_hash_memory) | |
1038 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
d495ab0d | 1039 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
1040 | } |
1041 | ||
8d88c4ca NC |
1042 | /* Create an X86-64 ELF linker hash table. */ |
1043 | ||
1044 | static struct bfd_link_hash_table * | |
351f65ca | 1045 | elf_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca | 1046 | { |
351f65ca L |
1047 | struct elf_x86_64_link_hash_table *ret; |
1048 | bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table); | |
8d88c4ca | 1049 | |
7bf52ea2 | 1050 | ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt); |
c434dee6 | 1051 | if (ret == NULL) |
8d88c4ca NC |
1052 | return NULL; |
1053 | ||
eb4ff4d6 | 1054 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
351f65ca L |
1055 | elf_x86_64_link_hash_newfunc, |
1056 | sizeof (struct elf_x86_64_link_hash_entry), | |
4dfe6ac6 | 1057 | X86_64_ELF_DATA)) |
8d88c4ca | 1058 | { |
e2d34d7d | 1059 | free (ret); |
8d88c4ca NC |
1060 | return NULL; |
1061 | } | |
1062 | ||
351f65ca L |
1063 | if (ABI_64_P (abfd)) |
1064 | { | |
1065 | ret->r_info = elf64_r_info; | |
1066 | ret->r_sym = elf64_r_sym; | |
248775ba | 1067 | ret->pointer_r_type = R_X86_64_64; |
351f65ca L |
1068 | ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; |
1069 | ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; | |
1070 | } | |
1071 | else | |
1072 | { | |
1073 | ret->r_info = elf32_r_info; | |
1074 | ret->r_sym = elf32_r_sym; | |
248775ba | 1075 | ret->pointer_r_type = R_X86_64_32; |
351f65ca L |
1076 | ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; |
1077 | ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER; | |
1078 | } | |
1079 | ||
c25bc9fc | 1080 | ret->loc_hash_table = htab_try_create (1024, |
351f65ca L |
1081 | elf_x86_64_local_htab_hash, |
1082 | elf_x86_64_local_htab_eq, | |
c25bc9fc L |
1083 | NULL); |
1084 | ret->loc_hash_memory = objalloc_create (); | |
1085 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
1086 | { | |
d495ab0d | 1087 | elf_x86_64_link_hash_table_free (abfd); |
c25bc9fc L |
1088 | return NULL; |
1089 | } | |
d495ab0d | 1090 | ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free; |
c25bc9fc | 1091 | |
c434dee6 AJ |
1092 | return &ret->elf.root; |
1093 | } | |
1094 | ||
c434dee6 AJ |
1095 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
1096 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
1097 | hash table. */ | |
1098 | ||
b34976b6 | 1099 | static bfd_boolean |
351f65ca L |
1100 | elf_x86_64_create_dynamic_sections (bfd *dynobj, |
1101 | struct bfd_link_info *info) | |
c434dee6 | 1102 | { |
351f65ca | 1103 | struct elf_x86_64_link_hash_table *htab; |
c434dee6 | 1104 | |
c434dee6 | 1105 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 1106 | return FALSE; |
c434dee6 | 1107 | |
351f65ca | 1108 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1109 | if (htab == NULL) |
1110 | return FALSE; | |
1111 | ||
3d4d4302 | 1112 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
9a926d55 | 1113 | if (!htab->sdynbss) |
c434dee6 AJ |
1114 | abort (); |
1115 | ||
0e1862bb | 1116 | if (bfd_link_executable (info)) |
9a926d55 L |
1117 | { |
1118 | /* Always allow copy relocs for building executables. */ | |
9d157cb9 | 1119 | asection *s = bfd_get_linker_section (dynobj, ".rela.bss"); |
9a926d55 L |
1120 | if (s == NULL) |
1121 | { | |
1122 | const struct elf_backend_data *bed = get_elf_backend_data (dynobj); | |
1123 | s = bfd_make_section_anyway_with_flags (dynobj, | |
1124 | ".rela.bss", | |
1125 | (bed->dynamic_sec_flags | |
1126 | | SEC_READONLY)); | |
1127 | if (s == NULL | |
1128 | || ! bfd_set_section_alignment (dynobj, s, | |
1129 | bed->s->log_file_align)) | |
1130 | return FALSE; | |
1131 | } | |
1132 | htab->srelbss = s; | |
1133 | } | |
1134 | ||
e41b3a13 | 1135 | if (!info->no_ld_generated_unwind_info |
2fe0fd06 | 1136 | && htab->plt_eh_frame == NULL |
e4de50d4 | 1137 | && htab->elf.splt != NULL) |
e41b3a13 | 1138 | { |
bbf96e4e L |
1139 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
1140 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1141 | | SEC_LINKER_CREATED); | |
e41b3a13 | 1142 | htab->plt_eh_frame |
bbf96e4e | 1143 | = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags); |
e41b3a13 JJ |
1144 | if (htab->plt_eh_frame == NULL |
1145 | || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3)) | |
1146 | return FALSE; | |
e41b3a13 | 1147 | } |
b34976b6 | 1148 | return TRUE; |
c434dee6 AJ |
1149 | } |
1150 | ||
1151 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
1152 | ||
1153 | static void | |
351f65ca L |
1154 | elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
1155 | struct elf_link_hash_entry *dir, | |
1156 | struct elf_link_hash_entry *ind) | |
c434dee6 | 1157 | { |
351f65ca | 1158 | struct elf_x86_64_link_hash_entry *edir, *eind; |
c434dee6 | 1159 | |
351f65ca L |
1160 | edir = (struct elf_x86_64_link_hash_entry *) dir; |
1161 | eind = (struct elf_x86_64_link_hash_entry *) ind; | |
c434dee6 | 1162 | |
0ff2b86e L |
1163 | if (!edir->has_bnd_reloc) |
1164 | edir->has_bnd_reloc = eind->has_bnd_reloc; | |
1165 | ||
aec6b87e L |
1166 | if (!edir->has_got_reloc) |
1167 | edir->has_got_reloc = eind->has_got_reloc; | |
1168 | ||
1169 | if (!edir->has_non_got_reloc) | |
1170 | edir->has_non_got_reloc = eind->has_non_got_reloc; | |
1171 | ||
c434dee6 AJ |
1172 | if (eind->dyn_relocs != NULL) |
1173 | { | |
1174 | if (edir->dyn_relocs != NULL) | |
1175 | { | |
e03a8ed8 L |
1176 | struct elf_dyn_relocs **pp; |
1177 | struct elf_dyn_relocs *p; | |
c434dee6 | 1178 | |
fcfa13d2 | 1179 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
1180 | list. Merge any entries against the same section. */ |
1181 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1182 | { | |
e03a8ed8 | 1183 | struct elf_dyn_relocs *q; |
c434dee6 AJ |
1184 | |
1185 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1186 | if (q->sec == p->sec) | |
1187 | { | |
1188 | q->pc_count += p->pc_count; | |
1189 | q->count += p->count; | |
1190 | *pp = p->next; | |
1191 | break; | |
1192 | } | |
1193 | if (q == NULL) | |
1194 | pp = &p->next; | |
1195 | } | |
1196 | *pp = edir->dyn_relocs; | |
1197 | } | |
1198 | ||
1199 | edir->dyn_relocs = eind->dyn_relocs; | |
1200 | eind->dyn_relocs = NULL; | |
1201 | } | |
1202 | ||
bffbf940 JJ |
1203 | if (ind->root.type == bfd_link_hash_indirect |
1204 | && dir->got.refcount <= 0) | |
1205 | { | |
1206 | edir->tls_type = eind->tls_type; | |
1207 | eind->tls_type = GOT_UNKNOWN; | |
1208 | } | |
1209 | ||
d40d037c AJ |
1210 | if (ELIMINATE_COPY_RELOCS |
1211 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1212 | && dir->dynamic_adjusted) |
1213 | { | |
1214 | /* If called to transfer flags for a weakdef during processing | |
1215 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1216 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
1217 | dir->ref_dynamic |= ind->ref_dynamic; | |
1218 | dir->ref_regular |= ind->ref_regular; | |
1219 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1220 | dir->needs_plt |= ind->needs_plt; | |
1221 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1222 | } | |
d40d037c | 1223 | else |
04ebc307 L |
1224 | { |
1225 | if (eind->func_pointer_refcount > 0) | |
1226 | { | |
1227 | edir->func_pointer_refcount += eind->func_pointer_refcount; | |
1228 | eind->func_pointer_refcount = 0; | |
1229 | } | |
1230 | ||
1231 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
1232 | } | |
8d88c4ca NC |
1233 | } |
1234 | ||
b34976b6 | 1235 | static bfd_boolean |
27482721 | 1236 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 1237 | { |
8d88c4ca NC |
1238 | /* Set the right machine number for an x86-64 elf64 file. */ |
1239 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 1240 | return TRUE; |
8d88c4ca NC |
1241 | } |
1242 | ||
8059fb19 RM |
1243 | static bfd_boolean |
1244 | elf32_x86_64_elf_object_p (bfd *abfd) | |
1245 | { | |
1246 | /* Set the right machine number for an x86-64 elf32 file. */ | |
1247 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
1248 | return TRUE; | |
1249 | } | |
1250 | ||
142411ca L |
1251 | /* Return TRUE if the TLS access code sequence support transition |
1252 | from R_TYPE. */ | |
1253 | ||
1254 | static bfd_boolean | |
351f65ca L |
1255 | elf_x86_64_check_tls_transition (bfd *abfd, |
1256 | struct bfd_link_info *info, | |
1257 | asection *sec, | |
1258 | bfd_byte *contents, | |
1259 | Elf_Internal_Shdr *symtab_hdr, | |
1260 | struct elf_link_hash_entry **sym_hashes, | |
1261 | unsigned int r_type, | |
1262 | const Elf_Internal_Rela *rel, | |
1263 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1264 | { |
142411ca L |
1265 | unsigned int val; |
1266 | unsigned long r_symndx; | |
5c98a14e | 1267 | bfd_boolean largepic = FALSE; |
142411ca L |
1268 | struct elf_link_hash_entry *h; |
1269 | bfd_vma offset; | |
351f65ca | 1270 | struct elf_x86_64_link_hash_table *htab; |
142411ca L |
1271 | |
1272 | /* Get the section contents. */ | |
1273 | if (contents == NULL) | |
1274 | { | |
1275 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1276 | contents = elf_section_data (sec)->this_hdr.contents; | |
1277 | else | |
1278 | { | |
1279 | /* FIXME: How to better handle error condition? */ | |
1280 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1281 | return FALSE; | |
bffbf940 | 1282 | |
142411ca L |
1283 | /* Cache the section contents for elf_link_input_bfd. */ |
1284 | elf_section_data (sec)->this_hdr.contents = contents; | |
1285 | } | |
1286 | } | |
1287 | ||
351f65ca | 1288 | htab = elf_x86_64_hash_table (info); |
142411ca | 1289 | offset = rel->r_offset; |
bffbf940 | 1290 | switch (r_type) |
142411ca L |
1291 | { |
1292 | case R_X86_64_TLSGD: | |
1293 | case R_X86_64_TLSLD: | |
1294 | if ((rel + 1) >= relend) | |
1295 | return FALSE; | |
1296 | ||
1297 | if (r_type == R_X86_64_TLSGD) | |
1298 | { | |
52bc799a | 1299 | /* Check transition from GD access model. For 64bit, only |
142411ca L |
1300 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
1301 | .word 0x6666; rex64; call __tls_get_addr | |
52bc799a L |
1302 | can transit to different access model. For 32bit, only |
1303 | leaq foo@tlsgd(%rip), %rdi | |
1304 | .word 0x6666; rex64; call __tls_get_addr | |
5c98a14e JJ |
1305 | can transit to different access model. For largepic |
1306 | we also support: | |
1307 | leaq foo@tlsgd(%rip), %rdi | |
1308 | movabsq $__tls_get_addr@pltoff, %rax | |
1309 | addq $rbx, %rax | |
1310 | call *%rax. */ | |
142411ca | 1311 | |
fa289a5f AM |
1312 | static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 }; |
1313 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; | |
1314 | ||
5c98a14e | 1315 | if ((offset + 12) > sec->size) |
142411ca | 1316 | return FALSE; |
52bc799a | 1317 | |
5c98a14e JJ |
1318 | if (memcmp (contents + offset + 4, call, 4) != 0) |
1319 | { | |
1320 | if (!ABI_64_P (abfd) | |
1321 | || (offset + 19) > sec->size | |
1322 | || offset < 3 | |
1323 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0 | |
1324 | || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0 | |
1325 | || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5) | |
1326 | != 0) | |
1327 | return FALSE; | |
1328 | largepic = TRUE; | |
1329 | } | |
1330 | else if (ABI_64_P (abfd)) | |
52bc799a | 1331 | { |
52bc799a | 1332 | if (offset < 4 |
fa289a5f | 1333 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1334 | return FALSE; |
1335 | } | |
1336 | else | |
1337 | { | |
52bc799a | 1338 | if (offset < 3 |
fa289a5f | 1339 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1340 | return FALSE; |
1341 | } | |
142411ca L |
1342 | } |
1343 | else | |
1344 | { | |
1345 | /* Check transition from LD access model. Only | |
1346 | leaq foo@tlsld(%rip), %rdi; | |
1347 | call __tls_get_addr | |
5c98a14e JJ |
1348 | can transit to different access model. For largepic |
1349 | we also support: | |
1350 | leaq foo@tlsld(%rip), %rdi | |
1351 | movabsq $__tls_get_addr@pltoff, %rax | |
1352 | addq $rbx, %rax | |
1353 | call *%rax. */ | |
142411ca | 1354 | |
fa289a5f | 1355 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1356 | |
1357 | if (offset < 3 || (offset + 9) > sec->size) | |
1358 | return FALSE; | |
1359 | ||
5c98a14e | 1360 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
142411ca | 1361 | return FALSE; |
5c98a14e JJ |
1362 | |
1363 | if (0xe8 != *(contents + offset + 4)) | |
1364 | { | |
1365 | if (!ABI_64_P (abfd) | |
1366 | || (offset + 19) > sec->size | |
1367 | || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0 | |
1368 | || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5) | |
1369 | != 0) | |
1370 | return FALSE; | |
1371 | largepic = TRUE; | |
1372 | } | |
142411ca L |
1373 | } |
1374 | ||
351f65ca | 1375 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1376 | if (r_symndx < symtab_hdr->sh_info) |
1377 | return FALSE; | |
1378 | ||
1379 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
c4fb387b | 1380 | /* Use strncmp to check __tls_get_addr since __tls_get_addr |
eed180f8 | 1381 | may be versioned. */ |
142411ca L |
1382 | return (h != NULL |
1383 | && h->root.root.string != NULL | |
5c98a14e JJ |
1384 | && (largepic |
1385 | ? ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64 | |
1386 | : (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32 | |
1387 | || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32)) | |
c4fb387b L |
1388 | && (strncmp (h->root.root.string, |
1389 | "__tls_get_addr", 14) == 0)); | |
142411ca L |
1390 | |
1391 | case R_X86_64_GOTTPOFF: | |
1392 | /* Check transition from IE access model: | |
4a4c5f25 L |
1393 | mov foo@gottpoff(%rip), %reg |
1394 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1395 | */ |
1396 | ||
4a4c5f25 L |
1397 | /* Check REX prefix first. */ |
1398 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1399 | { | |
1400 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1401 | if (val != 0x48 && val != 0x4c) | |
1402 | { | |
1403 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1404 | if (ABI_64_P (abfd)) | |
1405 | return FALSE; | |
1406 | } | |
1407 | } | |
1408 | else | |
1409 | { | |
1410 | /* X32 may not have any REX prefix. */ | |
1411 | if (ABI_64_P (abfd)) | |
1412 | return FALSE; | |
1413 | if (offset < 2 || (offset + 3) > sec->size) | |
1414 | return FALSE; | |
1415 | } | |
142411ca L |
1416 | |
1417 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1418 | if (val != 0x8b && val != 0x03) | |
1419 | return FALSE; | |
1420 | ||
1421 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1422 | return (val & 0xc7) == 5; | |
1423 | ||
1424 | case R_X86_64_GOTPC32_TLSDESC: | |
1425 | /* Check transition from GDesc access model: | |
1426 | leaq x@tlsdesc(%rip), %rax | |
1427 | ||
1428 | Make sure it's a leaq adding rip to a 32-bit offset | |
1429 | into any register, although it's probably almost always | |
1430 | going to be rax. */ | |
1431 | ||
1432 | if (offset < 3 || (offset + 4) > sec->size) | |
1433 | return FALSE; | |
1434 | ||
1435 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1436 | if ((val & 0xfb) != 0x48) | |
1437 | return FALSE; | |
1438 | ||
1439 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1440 | return FALSE; | |
1441 | ||
1442 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1443 | return (val & 0xc7) == 0x05; | |
1444 | ||
1445 | case R_X86_64_TLSDESC_CALL: | |
1446 | /* Check transition from GDesc access model: | |
1447 | call *x@tlsdesc(%rax) | |
1448 | */ | |
1449 | if (offset + 2 <= sec->size) | |
1450 | { | |
1451 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
fa289a5f AM |
1452 | static const unsigned char call[] = { 0xff, 0x10 }; |
1453 | return memcmp (contents + offset, call, 2) == 0; | |
142411ca L |
1454 | } |
1455 | ||
1456 | return FALSE; | |
1457 | ||
1458 | default: | |
1459 | abort (); | |
1460 | } | |
1461 | } | |
1462 | ||
1463 | /* Return TRUE if the TLS access transition is OK or no transition | |
1464 | will be performed. Update R_TYPE if there is a transition. */ | |
1465 | ||
1466 | static bfd_boolean | |
351f65ca L |
1467 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1468 | asection *sec, bfd_byte *contents, | |
1469 | Elf_Internal_Shdr *symtab_hdr, | |
1470 | struct elf_link_hash_entry **sym_hashes, | |
1471 | unsigned int *r_type, int tls_type, | |
1472 | const Elf_Internal_Rela *rel, | |
1473 | const Elf_Internal_Rela *relend, | |
1474 | struct elf_link_hash_entry *h, | |
1475 | unsigned long r_symndx) | |
142411ca L |
1476 | { |
1477 | unsigned int from_type = *r_type; | |
1478 | unsigned int to_type = from_type; | |
1479 | bfd_boolean check = TRUE; | |
1480 | ||
bb1cb422 L |
1481 | /* Skip TLS transition for functions. */ |
1482 | if (h != NULL | |
1483 | && (h->type == STT_FUNC | |
1484 | || h->type == STT_GNU_IFUNC)) | |
1485 | return TRUE; | |
1486 | ||
142411ca | 1487 | switch (from_type) |
bffbf940 JJ |
1488 | { |
1489 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1490 | case R_X86_64_GOTPC32_TLSDESC: |
1491 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1492 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1493 | if (bfd_link_executable (info)) |
142411ca L |
1494 | { |
1495 | if (h == NULL) | |
1496 | to_type = R_X86_64_TPOFF32; | |
1497 | else | |
1498 | to_type = R_X86_64_GOTTPOFF; | |
1499 | } | |
1500 | ||
351f65ca | 1501 | /* When we are called from elf_x86_64_relocate_section, |
142411ca L |
1502 | CONTENTS isn't NULL and there may be additional transitions |
1503 | based on TLS_TYPE. */ | |
1504 | if (contents != NULL) | |
1505 | { | |
1506 | unsigned int new_to_type = to_type; | |
1507 | ||
0e1862bb | 1508 | if (bfd_link_executable (info) |
142411ca L |
1509 | && h != NULL |
1510 | && h->dynindx == -1 | |
1511 | && tls_type == GOT_TLS_IE) | |
1512 | new_to_type = R_X86_64_TPOFF32; | |
1513 | ||
1514 | if (to_type == R_X86_64_TLSGD | |
1515 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1516 | || to_type == R_X86_64_TLSDESC_CALL) | |
1517 | { | |
1518 | if (tls_type == GOT_TLS_IE) | |
1519 | new_to_type = R_X86_64_GOTTPOFF; | |
1520 | } | |
1521 | ||
1522 | /* We checked the transition before when we were called from | |
351f65ca | 1523 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1524 | transition which hasn't been checked before. */ |
1525 | check = new_to_type != to_type && from_type == to_type; | |
1526 | to_type = new_to_type; | |
1527 | } | |
1528 | ||
1529 | break; | |
1530 | ||
bffbf940 | 1531 | case R_X86_64_TLSLD: |
0e1862bb | 1532 | if (bfd_link_executable (info)) |
142411ca L |
1533 | to_type = R_X86_64_TPOFF32; |
1534 | break; | |
1535 | ||
1536 | default: | |
1537 | return TRUE; | |
bffbf940 JJ |
1538 | } |
1539 | ||
142411ca L |
1540 | /* Return TRUE if there is no transition. */ |
1541 | if (from_type == to_type) | |
1542 | return TRUE; | |
1543 | ||
1544 | /* Check if the transition can be performed. */ | |
1545 | if (check | |
351f65ca L |
1546 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1547 | symtab_hdr, sym_hashes, | |
1548 | from_type, rel, relend)) | |
142411ca | 1549 | { |
2f629d23 | 1550 | reloc_howto_type *from, *to; |
4c544807 | 1551 | const char *name; |
142411ca | 1552 | |
351f65ca L |
1553 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1554 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1555 | |
4c544807 L |
1556 | if (h) |
1557 | name = h->root.root.string; | |
1558 | else | |
1559 | { | |
351f65ca | 1560 | struct elf_x86_64_link_hash_table *htab; |
4dfe6ac6 | 1561 | |
351f65ca | 1562 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1563 | if (htab == NULL) |
1564 | name = "*unknown*"; | |
1565 | else | |
1566 | { | |
1567 | Elf_Internal_Sym *isym; | |
1568 | ||
1569 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1570 | abfd, r_symndx); | |
1571 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1572 | } | |
4c544807 L |
1573 | } |
1574 | ||
142411ca L |
1575 | (*_bfd_error_handler) |
1576 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1577 | "in section `%A' failed"), | |
4c544807 | 1578 | abfd, sec, from->name, to->name, name, |
142411ca L |
1579 | (unsigned long) rel->r_offset); |
1580 | bfd_set_error (bfd_error_bad_value); | |
1581 | return FALSE; | |
1582 | } | |
1583 | ||
1584 | *r_type = to_type; | |
1585 | return TRUE; | |
bffbf940 JJ |
1586 | } |
1587 | ||
c1d11331 L |
1588 | /* Rename some of the generic section flags to better document how they |
1589 | are used here. */ | |
56ceb5b5 | 1590 | #define need_convert_load sec_flg0 |
c1d11331 | 1591 | |
70256ad8 | 1592 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1593 | calculate needed space in the global offset table, procedure |
1594 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1595 | |
b34976b6 | 1596 | static bfd_boolean |
351f65ca L |
1597 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1598 | asection *sec, | |
1599 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1600 | { |
351f65ca | 1601 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1602 | Elf_Internal_Shdr *symtab_hdr; |
1603 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1604 | const Elf_Internal_Rela *rel; |
1605 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 1606 | asection *sreloc; |
dd7e64d4 | 1607 | bfd_boolean use_plt_got; |
70256ad8 | 1608 | |
0e1862bb | 1609 | if (bfd_link_relocatable (info)) |
b34976b6 | 1610 | return TRUE; |
70256ad8 | 1611 | |
0ffa91dd NC |
1612 | BFD_ASSERT (is_x86_64_elf (abfd)); |
1613 | ||
351f65ca | 1614 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1615 | if (htab == NULL) |
1616 | return FALSE; | |
1617 | ||
dd7e64d4 L |
1618 | use_plt_got = get_elf_x86_64_backend_data (abfd) == &elf_x86_64_arch_bed; |
1619 | ||
0ffa91dd | 1620 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1621 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1622 | |
c434dee6 | 1623 | sreloc = NULL; |
cbe950e9 | 1624 | |
70256ad8 AJ |
1625 | rel_end = relocs + sec->reloc_count; |
1626 | for (rel = relocs; rel < rel_end; rel++) | |
1627 | { | |
bffbf940 | 1628 | unsigned int r_type; |
70256ad8 AJ |
1629 | unsigned long r_symndx; |
1630 | struct elf_link_hash_entry *h; | |
aec6b87e | 1631 | struct elf_x86_64_link_hash_entry *eh; |
4c544807 L |
1632 | Elf_Internal_Sym *isym; |
1633 | const char *name; | |
06a6a421 | 1634 | bfd_boolean size_reloc; |
70256ad8 | 1635 | |
351f65ca L |
1636 | r_symndx = htab->r_sym (rel->r_info); |
1637 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1638 | |
1639 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1640 | { | |
d003868e AM |
1641 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1642 | abfd, r_symndx); | |
b34976b6 | 1643 | return FALSE; |
c434dee6 AJ |
1644 | } |
1645 | ||
70256ad8 | 1646 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1647 | { |
1648 | /* A local symbol. */ | |
c2e61a4e L |
1649 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1650 | abfd, r_symndx); | |
1651 | if (isym == NULL) | |
1652 | return FALSE; | |
c25bc9fc L |
1653 | |
1654 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1655 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1656 | { |
351f65ca L |
1657 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, |
1658 | TRUE); | |
c25bc9fc | 1659 | if (h == NULL) |
c2e61a4e | 1660 | return FALSE; |
6bbec505 | 1661 | |
c25bc9fc L |
1662 | /* Fake a STT_GNU_IFUNC symbol. */ |
1663 | h->type = STT_GNU_IFUNC; | |
1664 | h->def_regular = 1; | |
1665 | h->ref_regular = 1; | |
1666 | h->forced_local = 1; | |
1667 | h->root.type = bfd_link_hash_defined; | |
1668 | } | |
1669 | else | |
1670 | h = NULL; | |
1671 | } | |
70256ad8 | 1672 | else |
71cb9464 | 1673 | { |
4c544807 | 1674 | isym = NULL; |
71cb9464 L |
1675 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1676 | while (h->root.type == bfd_link_hash_indirect | |
1677 | || h->root.type == bfd_link_hash_warning) | |
1678 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1679 | } |
cbe950e9 | 1680 | |
d1534d16 L |
1681 | /* Check invalid x32 relocations. */ |
1682 | if (!ABI_64_P (abfd)) | |
1683 | switch (r_type) | |
1684 | { | |
1685 | default: | |
1686 | break; | |
1687 | ||
d1534d16 L |
1688 | case R_X86_64_DTPOFF64: |
1689 | case R_X86_64_TPOFF64: | |
1690 | case R_X86_64_PC64: | |
1691 | case R_X86_64_GOTOFF64: | |
1692 | case R_X86_64_GOT64: | |
1693 | case R_X86_64_GOTPCREL64: | |
1694 | case R_X86_64_GOTPC64: | |
1695 | case R_X86_64_GOTPLT64: | |
1696 | case R_X86_64_PLTOFF64: | |
1697 | { | |
1698 | if (h) | |
1699 | name = h->root.root.string; | |
1700 | else | |
1701 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1702 | NULL); | |
1703 | (*_bfd_error_handler) | |
1704 | (_("%B: relocation %s against symbol `%s' isn't " | |
1705 | "supported in x32 mode"), abfd, | |
1706 | x86_64_elf_howto_table[r_type].name, name); | |
1707 | bfd_set_error (bfd_error_bad_value); | |
1708 | return FALSE; | |
1709 | } | |
1710 | break; | |
1711 | } | |
1712 | ||
c25bc9fc L |
1713 | if (h != NULL) |
1714 | { | |
cbe950e9 L |
1715 | /* Create the ifunc sections for static executables. If we |
1716 | never see an indirect function symbol nor we are building | |
1717 | a static executable, those sections will be empty and | |
1718 | won't appear in output. */ | |
1719 | switch (r_type) | |
1720 | { | |
1721 | default: | |
1722 | break; | |
1723 | ||
0ff2b86e L |
1724 | case R_X86_64_PC32_BND: |
1725 | case R_X86_64_PLT32_BND: | |
d258b828 IZ |
1726 | case R_X86_64_PC32: |
1727 | case R_X86_64_PLT32: | |
1728 | case R_X86_64_32: | |
1729 | case R_X86_64_64: | |
0ff2b86e L |
1730 | /* MPX PLT is supported only if elf_x86_64_arch_bed |
1731 | is used in 64-bit mode. */ | |
1732 | if (ABI_64_P (abfd) | |
d258b828 IZ |
1733 | && info->bndplt |
1734 | && (get_elf_x86_64_backend_data (abfd) | |
1735 | == &elf_x86_64_arch_bed)) | |
0ff2b86e | 1736 | { |
bc696fd5 | 1737 | elf_x86_64_hash_entry (h)->has_bnd_reloc = 1; |
0ff2b86e L |
1738 | |
1739 | /* Create the second PLT for Intel MPX support. */ | |
1740 | if (htab->plt_bnd == NULL) | |
1741 | { | |
1742 | unsigned int plt_bnd_align; | |
1743 | const struct elf_backend_data *bed; | |
1744 | ||
1745 | bed = get_elf_backend_data (info->output_bfd); | |
6db50b4c L |
1746 | BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry) == 8 |
1747 | && (sizeof (elf_x86_64_bnd_plt2_entry) | |
1748 | == sizeof (elf_x86_64_legacy_plt2_entry))); | |
1749 | plt_bnd_align = 3; | |
0ff2b86e L |
1750 | |
1751 | if (htab->elf.dynobj == NULL) | |
1752 | htab->elf.dynobj = abfd; | |
1753 | htab->plt_bnd | |
1754 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
1755 | ".plt.bnd", | |
1756 | (bed->dynamic_sec_flags | |
1757 | | SEC_ALLOC | |
1758 | | SEC_CODE | |
1759 | | SEC_LOAD | |
1760 | | SEC_READONLY)); | |
1761 | if (htab->plt_bnd == NULL | |
1762 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
1763 | htab->plt_bnd, | |
1764 | plt_bnd_align)) | |
1765 | return FALSE; | |
1766 | } | |
1767 | } | |
1768 | ||
cbe950e9 | 1769 | case R_X86_64_32S: |
cbe950e9 | 1770 | case R_X86_64_PC64: |
cbe950e9 | 1771 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
1772 | case R_X86_64_GOTPCRELX: |
1773 | case R_X86_64_REX_GOTPCRELX: | |
cbe950e9 | 1774 | case R_X86_64_GOTPCREL64: |
9d4057ee AM |
1775 | if (htab->elf.dynobj == NULL) |
1776 | htab->elf.dynobj = abfd; | |
1777 | if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) | |
c2e61a4e | 1778 | return FALSE; |
cbe950e9 L |
1779 | break; |
1780 | } | |
1781 | ||
ad1e85de L |
1782 | /* It is referenced by a non-shared object. */ |
1783 | h->ref_regular = 1; | |
61315175 | 1784 | h->root.non_ir_ref = 1; |
13a2df29 L |
1785 | |
1786 | if (h->type == STT_GNU_IFUNC) | |
1787 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
1788 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 1789 | } |
70256ad8 | 1790 | |
351f65ca L |
1791 | if (! elf_x86_64_tls_transition (info, abfd, sec, NULL, |
1792 | symtab_hdr, sym_hashes, | |
1793 | &r_type, GOT_UNKNOWN, | |
1794 | rel, rel_end, h, r_symndx)) | |
c2e61a4e | 1795 | return FALSE; |
142411ca | 1796 | |
aec6b87e | 1797 | eh = (struct elf_x86_64_link_hash_entry *) h; |
bffbf940 | 1798 | switch (r_type) |
70256ad8 | 1799 | { |
bffbf940 JJ |
1800 | case R_X86_64_TLSLD: |
1801 | htab->tls_ld_got.refcount += 1; | |
1802 | goto create_got; | |
1803 | ||
1804 | case R_X86_64_TPOFF32: | |
0e1862bb | 1805 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
70256ad8 | 1806 | { |
09a24cbf | 1807 | if (h) |
4c544807 L |
1808 | name = h->root.root.string; |
1809 | else | |
1810 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1811 | NULL); | |
bffbf940 | 1812 | (*_bfd_error_handler) |
d003868e AM |
1813 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
1814 | abfd, | |
4c544807 | 1815 | x86_64_elf_howto_table[r_type].name, name); |
bffbf940 | 1816 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1817 | return FALSE; |
70256ad8 | 1818 | } |
aec6b87e L |
1819 | if (eh != NULL) |
1820 | eh->has_got_reloc = 1; | |
bffbf940 | 1821 | break; |
c434dee6 | 1822 | |
bffbf940 | 1823 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1824 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
1825 | info->flags |= DF_STATIC_TLS; |
1826 | /* Fall through */ | |
70256ad8 | 1827 | |
bffbf940 JJ |
1828 | case R_X86_64_GOT32: |
1829 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
1830 | case R_X86_64_GOTPCRELX: |
1831 | case R_X86_64_REX_GOTPCRELX: | |
bffbf940 | 1832 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
1833 | case R_X86_64_GOT64: |
1834 | case R_X86_64_GOTPCREL64: | |
1835 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
1836 | case R_X86_64_GOTPC32_TLSDESC: |
1837 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
1838 | /* This symbol requires a global offset table entry. */ |
1839 | { | |
1840 | int tls_type, old_tls_type; | |
1841 | ||
1842 | switch (r_type) | |
1843 | { | |
1844 | default: tls_type = GOT_NORMAL; break; | |
1845 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
1846 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
1847 | case R_X86_64_GOTPC32_TLSDESC: |
1848 | case R_X86_64_TLSDESC_CALL: | |
1849 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
1850 | } |
1851 | ||
1852 | if (h != NULL) | |
1853 | { | |
1854 | h->got.refcount += 1; | |
aec6b87e | 1855 | old_tls_type = eh->tls_type; |
bffbf940 JJ |
1856 | } |
1857 | else | |
1858 | { | |
1859 | bfd_signed_vma *local_got_refcounts; | |
1860 | ||
1861 | /* This is a global offset table entry for a local symbol. */ | |
1862 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1863 | if (local_got_refcounts == NULL) | |
1864 | { | |
1865 | bfd_size_type size; | |
1866 | ||
1867 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1868 | size *= sizeof (bfd_signed_vma) |
1869 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
1870 | local_got_refcounts = ((bfd_signed_vma *) |
1871 | bfd_zalloc (abfd, size)); | |
1872 | if (local_got_refcounts == NULL) | |
c2e61a4e | 1873 | return FALSE; |
bffbf940 | 1874 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
351f65ca | 1875 | elf_x86_64_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 1876 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
351f65ca | 1877 | elf_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 1878 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
1879 | } |
1880 | local_got_refcounts[r_symndx] += 1; | |
1881 | old_tls_type | |
351f65ca | 1882 | = elf_x86_64_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
1883 | } |
1884 | ||
1885 | /* If a TLS symbol is accessed using IE at least once, | |
1886 | there is no point to use dynamic model for it. */ | |
1887 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
1888 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
1889 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 1890 | { |
67a4f2b7 | 1891 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 1892 | tls_type = old_tls_type; |
67a4f2b7 AO |
1893 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1894 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1895 | tls_type |= old_tls_type; | |
bffbf940 JJ |
1896 | else |
1897 | { | |
09a24cbf | 1898 | if (h) |
4c544807 L |
1899 | name = h->root.root.string; |
1900 | else | |
1901 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
1902 | isym, NULL); | |
bffbf940 | 1903 | (*_bfd_error_handler) |
1f7a4e42 | 1904 | (_("%B: '%s' accessed both as normal and thread local symbol"), |
4c544807 | 1905 | abfd, name); |
68c4a57e | 1906 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1907 | return FALSE; |
bffbf940 JJ |
1908 | } |
1909 | } | |
1910 | ||
1911 | if (old_tls_type != tls_type) | |
1912 | { | |
aec6b87e L |
1913 | if (eh != NULL) |
1914 | eh->tls_type = tls_type; | |
bffbf940 | 1915 | else |
351f65ca | 1916 | elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
1917 | } |
1918 | } | |
c434dee6 AJ |
1919 | /* Fall through */ |
1920 | ||
d6ab8113 JB |
1921 | case R_X86_64_GOTOFF64: |
1922 | case R_X86_64_GOTPC32: | |
7b81dfbb | 1923 | case R_X86_64_GOTPC64: |
bffbf940 | 1924 | create_got: |
aec6b87e L |
1925 | if (eh != NULL) |
1926 | eh->has_got_reloc = 1; | |
6de2ae4a | 1927 | if (htab->elf.sgot == NULL) |
c434dee6 AJ |
1928 | { |
1929 | if (htab->elf.dynobj == NULL) | |
1930 | htab->elf.dynobj = abfd; | |
6de2ae4a L |
1931 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, |
1932 | info)) | |
c2e61a4e | 1933 | return FALSE; |
c434dee6 | 1934 | } |
70256ad8 AJ |
1935 | break; |
1936 | ||
1937 | case R_X86_64_PLT32: | |
c3320543 | 1938 | case R_X86_64_PLT32_BND: |
70256ad8 | 1939 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
1940 | actually build the entry in adjust_dynamic_symbol, |
1941 | because this might be a case of linking PIC code which is | |
1942 | never referenced by a dynamic object, in which case we | |
1943 | don't need to generate a procedure linkage table entry | |
1944 | after all. */ | |
70256ad8 AJ |
1945 | |
1946 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 1947 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
1948 | if (h == NULL) |
1949 | continue; | |
1950 | ||
aec6b87e | 1951 | eh->has_got_reloc = 1; |
f5385ebf | 1952 | h->needs_plt = 1; |
51b64d56 | 1953 | h->plt.refcount += 1; |
70256ad8 AJ |
1954 | break; |
1955 | ||
7b81dfbb AJ |
1956 | case R_X86_64_PLTOFF64: |
1957 | /* This tries to form the 'address' of a function relative | |
1958 | to GOT. For global symbols we need a PLT entry. */ | |
1959 | if (h != NULL) | |
1960 | { | |
1961 | h->needs_plt = 1; | |
1962 | h->plt.refcount += 1; | |
1963 | } | |
1964 | goto create_got; | |
1965 | ||
6a3e1bae L |
1966 | case R_X86_64_SIZE32: |
1967 | case R_X86_64_SIZE64: | |
06a6a421 | 1968 | size_reloc = TRUE; |
6a3e1bae L |
1969 | goto do_size; |
1970 | ||
248775ba L |
1971 | case R_X86_64_32: |
1972 | if (!ABI_64_P (abfd)) | |
1973 | goto pointer; | |
cc78d0af AJ |
1974 | case R_X86_64_8: |
1975 | case R_X86_64_16: | |
70256ad8 | 1976 | case R_X86_64_32S: |
1b71fb54 AJ |
1977 | /* Let's help debug shared library creation. These relocs |
1978 | cannot be used in shared libs. Don't error out for | |
1979 | sections we don't care about, such as debug sections or | |
4c10bbaa L |
1980 | non-constant sections, or when relocation overflow check |
1981 | is disabled. */ | |
1982 | if (!info->no_reloc_overflow_check | |
1983 | && bfd_link_pic (info) | |
1b71fb54 AJ |
1984 | && (sec->flags & SEC_ALLOC) != 0 |
1985 | && (sec->flags & SEC_READONLY) != 0) | |
1986 | { | |
09a24cbf | 1987 | if (h) |
4c544807 L |
1988 | name = h->root.root.string; |
1989 | else | |
1990 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1b71fb54 | 1991 | (*_bfd_error_handler) |
d003868e | 1992 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
4c544807 | 1993 | abfd, x86_64_elf_howto_table[r_type].name, name); |
1b71fb54 | 1994 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1995 | return FALSE; |
1b71fb54 AJ |
1996 | } |
1997 | /* Fall through. */ | |
1998 | ||
c434dee6 AJ |
1999 | case R_X86_64_PC8: |
2000 | case R_X86_64_PC16: | |
70256ad8 | 2001 | case R_X86_64_PC32: |
c3320543 | 2002 | case R_X86_64_PC32_BND: |
d6ab8113 | 2003 | case R_X86_64_PC64: |
1b71fb54 | 2004 | case R_X86_64_64: |
248775ba | 2005 | pointer: |
aec6b87e L |
2006 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
2007 | eh->has_non_got_reloc = 1; | |
d1ed1c7d L |
2008 | /* STT_GNU_IFUNC symbol must go through PLT even if it is |
2009 | locally defined and undefined symbol may turn out to be | |
2010 | a STT_GNU_IFUNC symbol later. */ | |
2011 | if (h != NULL | |
2012 | && (bfd_link_executable (info) | |
2013 | || ((h->type == STT_GNU_IFUNC | |
2014 | || h->root.type == bfd_link_hash_undefweak | |
2015 | || h->root.type == bfd_link_hash_undefined) | |
2016 | && SYMBOLIC_BIND (info, h)))) | |
c434dee6 AJ |
2017 | { |
2018 | /* If this reloc is in a read-only section, we might | |
2019 | need a copy reloc. We can't check reliably at this | |
2020 | stage whether the section is read-only, as input | |
2021 | sections have not yet been mapped to output sections. | |
2022 | Tentatively set the flag for now, and correct in | |
2023 | adjust_dynamic_symbol. */ | |
f5385ebf | 2024 | h->non_got_ref = 1; |
c434dee6 AJ |
2025 | |
2026 | /* We may need a .plt entry if the function this reloc | |
2027 | refers to is in a shared lib. */ | |
2028 | h->plt.refcount += 1; | |
5db4f0d3 L |
2029 | if (r_type == R_X86_64_PC32) |
2030 | { | |
2031 | /* Since something like ".long foo - ." may be used | |
2032 | as pointer, make sure that PLT is used if foo is | |
2033 | a function defined in a shared library. */ | |
2034 | if ((sec->flags & SEC_CODE) == 0) | |
2035 | h->pointer_equality_needed = 1; | |
2036 | } | |
2037 | else if (r_type != R_X86_64_PC32_BND | |
2038 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
2039 | { |
2040 | h->pointer_equality_needed = 1; | |
2041 | /* At run-time, R_X86_64_64 can be resolved for both | |
2042 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
2043 | can only be resolved for x32. */ | |
2044 | if ((sec->flags & SEC_READONLY) == 0 | |
2045 | && (r_type == R_X86_64_64 | |
2046 | || (!ABI_64_P (abfd) | |
2047 | && (r_type == R_X86_64_32 | |
2048 | || r_type == R_X86_64_32S)))) | |
aec6b87e | 2049 | eh->func_pointer_refcount += 1; |
04ebc307 | 2050 | } |
c434dee6 | 2051 | } |
70256ad8 | 2052 | |
06a6a421 | 2053 | size_reloc = FALSE; |
6a3e1bae | 2054 | do_size: |
70256ad8 AJ |
2055 | /* If we are creating a shared library, and this is a reloc |
2056 | against a global symbol, or a non PC relative reloc | |
2057 | against a local symbol, then we need to copy the reloc | |
2058 | into the shared library. However, if we are linking with | |
2059 | -Bsymbolic, we do not need to copy a reloc against a | |
2060 | global symbol which is defined in an object we are | |
407443a3 | 2061 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
2062 | this point we have not seen all the input files, so it is |
2063 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
2064 | later (it is never cleared). In case of a weak definition, |
2065 | DEF_REGULAR may be cleared later by a strong definition in | |
2066 | a shared library. We account for that possibility below by | |
2067 | storing information in the relocs_copied field of the hash | |
2068 | table entry. A similar situation occurs when creating | |
2069 | shared libraries and symbol visibility changes render the | |
31c0ebfe | 2070 | symbol local. |
c434dee6 AJ |
2071 | |
2072 | If on the other hand, we are creating an executable, we | |
2073 | may need to keep relocations for symbols satisfied by a | |
2074 | dynamic library if we manage to avoid copy relocs for the | |
0f88be7a | 2075 | symbol. */ |
0e1862bb | 2076 | if ((bfd_link_pic (info) |
c434dee6 | 2077 | && (sec->flags & SEC_ALLOC) != 0 |
d8045f23 | 2078 | && (! IS_X86_64_PCREL_TYPE (r_type) |
c434dee6 | 2079 | || (h != NULL |
4e0c91e4 L |
2080 | && (! (bfd_link_pie (info) |
2081 | || SYMBOLIC_BIND (info, h)) | |
c434dee6 | 2082 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 2083 | || !h->def_regular)))) |
d40d037c | 2084 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 2085 | && !bfd_link_pic (info) |
c434dee6 AJ |
2086 | && (sec->flags & SEC_ALLOC) != 0 |
2087 | && h != NULL | |
2088 | && (h->root.type == bfd_link_hash_defweak | |
0f88be7a | 2089 | || !h->def_regular))) |
70256ad8 | 2090 | { |
e03a8ed8 L |
2091 | struct elf_dyn_relocs *p; |
2092 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2093 | |
2094 | /* We must copy these reloc types into the output file. | |
2095 | Create a reloc section in dynobj and make room for | |
2096 | this reloc. */ | |
70256ad8 AJ |
2097 | if (sreloc == NULL) |
2098 | { | |
c434dee6 AJ |
2099 | if (htab->elf.dynobj == NULL) |
2100 | htab->elf.dynobj = abfd; | |
2101 | ||
83bac4b0 | 2102 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
2103 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
2104 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 2105 | |
70256ad8 | 2106 | if (sreloc == NULL) |
c2e61a4e | 2107 | return FALSE; |
70256ad8 AJ |
2108 | } |
2109 | ||
c434dee6 AJ |
2110 | /* If this is a global symbol, we count the number of |
2111 | relocations we need for this symbol. */ | |
2112 | if (h != NULL) | |
aec6b87e | 2113 | head = &eh->dyn_relocs; |
c434dee6 AJ |
2114 | else |
2115 | { | |
2116 | /* Track dynamic relocs needed for local syms too. | |
2117 | We really need local syms available to do this | |
2118 | easily. Oh well. */ | |
c434dee6 | 2119 | asection *s; |
87d72d41 | 2120 | void **vpp; |
87d72d41 AM |
2121 | |
2122 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2123 | abfd, r_symndx); | |
2124 | if (isym == NULL) | |
2125 | return FALSE; | |
2126 | ||
2127 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2128 | if (s == NULL) |
87d72d41 | 2129 | s = sec; |
70256ad8 | 2130 | |
e81d3500 DD |
2131 | /* Beware of type punned pointers vs strict aliasing |
2132 | rules. */ | |
2133 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2134 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2135 | } |
70256ad8 | 2136 | |
c434dee6 AJ |
2137 | p = *head; |
2138 | if (p == NULL || p->sec != sec) | |
2139 | { | |
2140 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 2141 | |
e03a8ed8 | 2142 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2143 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2144 | if (p == NULL) |
c2e61a4e | 2145 | return FALSE; |
c434dee6 AJ |
2146 | p->next = *head; |
2147 | *head = p; | |
2148 | p->sec = sec; | |
2149 | p->count = 0; | |
2150 | p->pc_count = 0; | |
70256ad8 | 2151 | } |
c434dee6 AJ |
2152 | |
2153 | p->count += 1; | |
06a6a421 L |
2154 | /* Count size relocation as PC-relative relocation. */ |
2155 | if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc) | |
c434dee6 | 2156 | p->pc_count += 1; |
70256ad8 AJ |
2157 | } |
2158 | break; | |
fe4770f4 AJ |
2159 | |
2160 | /* This relocation describes the C++ object vtable hierarchy. | |
2161 | Reconstruct it for later use during GC. */ | |
2162 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2163 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c2e61a4e | 2164 | return FALSE; |
fe4770f4 AJ |
2165 | break; |
2166 | ||
2167 | /* This relocation describes which C++ vtable entries are actually | |
2168 | used. Record for later use during GC. */ | |
2169 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
2170 | BFD_ASSERT (h != NULL); |
2171 | if (h != NULL | |
2172 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
c2e61a4e | 2173 | return FALSE; |
fe4770f4 | 2174 | break; |
c434dee6 AJ |
2175 | |
2176 | default: | |
2177 | break; | |
70256ad8 | 2178 | } |
dd7e64d4 L |
2179 | |
2180 | if (use_plt_got | |
2181 | && h != NULL | |
2182 | && h->plt.refcount > 0 | |
8ded2ddc L |
2183 | && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
2184 | || h->got.refcount > 0) | |
dd7e64d4 L |
2185 | && htab->plt_got == NULL) |
2186 | { | |
2187 | /* Create the GOT procedure linkage table. */ | |
2188 | unsigned int plt_got_align; | |
2189 | const struct elf_backend_data *bed; | |
2190 | ||
2191 | bed = get_elf_backend_data (info->output_bfd); | |
2192 | BFD_ASSERT (sizeof (elf_x86_64_legacy_plt2_entry) == 8 | |
2193 | && (sizeof (elf_x86_64_bnd_plt2_entry) | |
2194 | == sizeof (elf_x86_64_legacy_plt2_entry))); | |
2195 | plt_got_align = 3; | |
2196 | ||
2197 | if (htab->elf.dynobj == NULL) | |
2198 | htab->elf.dynobj = abfd; | |
2199 | htab->plt_got | |
2200 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
2201 | ".plt.got", | |
2202 | (bed->dynamic_sec_flags | |
2203 | | SEC_ALLOC | |
2204 | | SEC_CODE | |
2205 | | SEC_LOAD | |
2206 | | SEC_READONLY)); | |
2207 | if (htab->plt_got == NULL | |
2208 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
2209 | htab->plt_got, | |
2210 | plt_got_align)) | |
2211 | return FALSE; | |
2212 | } | |
c1d11331 | 2213 | |
56ceb5b5 L |
2214 | if ((r_type == R_X86_64_GOTPCREL |
2215 | || r_type == R_X86_64_GOTPCRELX | |
2216 | || r_type == R_X86_64_REX_GOTPCRELX) | |
c1d11331 | 2217 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
56ceb5b5 | 2218 | sec->need_convert_load = 1; |
70256ad8 AJ |
2219 | } |
2220 | ||
b34976b6 | 2221 | return TRUE; |
70256ad8 AJ |
2222 | } |
2223 | ||
2224 | /* Return the section that should be marked against GC for a given | |
407443a3 | 2225 | relocation. */ |
70256ad8 AJ |
2226 | |
2227 | static asection * | |
351f65ca L |
2228 | elf_x86_64_gc_mark_hook (asection *sec, |
2229 | struct bfd_link_info *info, | |
2230 | Elf_Internal_Rela *rel, | |
2231 | struct elf_link_hash_entry *h, | |
2232 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
2233 | { |
2234 | if (h != NULL) | |
351f65ca | 2235 | switch (ELF32_R_TYPE (rel->r_info)) |
07adf181 AM |
2236 | { |
2237 | case R_X86_64_GNU_VTINHERIT: | |
2238 | case R_X86_64_GNU_VTENTRY: | |
2239 | return NULL; | |
2240 | } | |
2241 | ||
2242 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
2243 | } |
2244 | ||
407443a3 | 2245 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 | 2246 | |
b34976b6 | 2247 | static bfd_boolean |
351f65ca L |
2248 | elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, |
2249 | asection *sec, | |
2250 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 2251 | { |
351f65ca | 2252 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2253 | Elf_Internal_Shdr *symtab_hdr; |
2254 | struct elf_link_hash_entry **sym_hashes; | |
2255 | bfd_signed_vma *local_got_refcounts; | |
2256 | const Elf_Internal_Rela *rel, *relend; | |
c434dee6 | 2257 | |
0e1862bb | 2258 | if (bfd_link_relocatable (info)) |
7dda2462 TG |
2259 | return TRUE; |
2260 | ||
351f65ca | 2261 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2262 | if (htab == NULL) |
2263 | return FALSE; | |
2264 | ||
c434dee6 | 2265 | elf_section_data (sec)->local_dynrel = NULL; |
70256ad8 | 2266 | |
0ffa91dd | 2267 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 AJ |
2268 | sym_hashes = elf_sym_hashes (abfd); |
2269 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2270 | ||
351f65ca | 2271 | htab = elf_x86_64_hash_table (info); |
70256ad8 AJ |
2272 | relend = relocs + sec->reloc_count; |
2273 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
2274 | { |
2275 | unsigned long r_symndx; | |
2276 | unsigned int r_type; | |
2277 | struct elf_link_hash_entry *h = NULL; | |
04ebc307 | 2278 | bfd_boolean pointer_reloc; |
70256ad8 | 2279 | |
351f65ca | 2280 | r_symndx = htab->r_sym (rel->r_info); |
26e41594 AM |
2281 | if (r_symndx >= symtab_hdr->sh_info) |
2282 | { | |
26e41594 | 2283 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
2284 | while (h->root.type == bfd_link_hash_indirect |
2285 | || h->root.type == bfd_link_hash_warning) | |
2286 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 2287 | } |
bb1cb422 L |
2288 | else |
2289 | { | |
2290 | /* A local symbol. */ | |
2291 | Elf_Internal_Sym *isym; | |
2292 | ||
2293 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2294 | abfd, r_symndx); | |
2295 | ||
2296 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
2297 | if (isym != NULL | |
82e96e07 | 2298 | && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
bb1cb422 | 2299 | { |
351f65ca | 2300 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE); |
bb1cb422 L |
2301 | if (h == NULL) |
2302 | abort (); | |
2303 | } | |
2304 | } | |
c434dee6 | 2305 | |
3db2e7dd L |
2306 | if (h) |
2307 | { | |
2308 | struct elf_x86_64_link_hash_entry *eh; | |
2309 | struct elf_dyn_relocs **pp; | |
2310 | struct elf_dyn_relocs *p; | |
2311 | ||
2312 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2313 | ||
2314 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
2315 | if (p->sec == sec) | |
2316 | { | |
2317 | /* Everything must go for SEC. */ | |
2318 | *pp = p->next; | |
2319 | break; | |
2320 | } | |
2321 | } | |
2322 | ||
351f65ca L |
2323 | r_type = ELF32_R_TYPE (rel->r_info); |
2324 | if (! elf_x86_64_tls_transition (info, abfd, sec, NULL, | |
2325 | symtab_hdr, sym_hashes, | |
2326 | &r_type, GOT_UNKNOWN, | |
2327 | rel, relend, h, r_symndx)) | |
142411ca L |
2328 | return FALSE; |
2329 | ||
04ebc307 | 2330 | pointer_reloc = FALSE; |
26e41594 AM |
2331 | switch (r_type) |
2332 | { | |
2333 | case R_X86_64_TLSLD: | |
4dfe6ac6 NC |
2334 | if (htab->tls_ld_got.refcount > 0) |
2335 | htab->tls_ld_got.refcount -= 1; | |
26e41594 | 2336 | break; |
c434dee6 | 2337 | |
26e41594 | 2338 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
2339 | case R_X86_64_GOTPC32_TLSDESC: |
2340 | case R_X86_64_TLSDESC_CALL: | |
26e41594 AM |
2341 | case R_X86_64_GOTTPOFF: |
2342 | case R_X86_64_GOT32: | |
2343 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
2344 | case R_X86_64_GOTPCRELX: |
2345 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
2346 | case R_X86_64_GOT64: |
2347 | case R_X86_64_GOTPCREL64: | |
2348 | case R_X86_64_GOTPLT64: | |
26e41594 AM |
2349 | if (h != NULL) |
2350 | { | |
2351 | if (h->got.refcount > 0) | |
2352 | h->got.refcount -= 1; | |
bb1cb422 L |
2353 | if (h->type == STT_GNU_IFUNC) |
2354 | { | |
2355 | if (h->plt.refcount > 0) | |
2356 | h->plt.refcount -= 1; | |
2357 | } | |
26e41594 AM |
2358 | } |
2359 | else if (local_got_refcounts != NULL) | |
2360 | { | |
2361 | if (local_got_refcounts[r_symndx] > 0) | |
2362 | local_got_refcounts[r_symndx] -= 1; | |
2363 | } | |
2364 | break; | |
c434dee6 | 2365 | |
26e41594 | 2366 | case R_X86_64_32: |
26e41594 | 2367 | case R_X86_64_32S: |
04ebc307 L |
2368 | pointer_reloc = !ABI_64_P (abfd); |
2369 | goto pointer; | |
2370 | ||
2371 | case R_X86_64_64: | |
2372 | pointer_reloc = TRUE; | |
2373 | case R_X86_64_8: | |
2374 | case R_X86_64_16: | |
26e41594 AM |
2375 | case R_X86_64_PC8: |
2376 | case R_X86_64_PC16: | |
2377 | case R_X86_64_PC32: | |
c3320543 | 2378 | case R_X86_64_PC32_BND: |
d6ab8113 | 2379 | case R_X86_64_PC64: |
1788fc08 L |
2380 | case R_X86_64_SIZE32: |
2381 | case R_X86_64_SIZE64: | |
04ebc307 | 2382 | pointer: |
0e1862bb | 2383 | if (bfd_link_pic (info) |
3db2e7dd | 2384 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
26e41594 AM |
2385 | break; |
2386 | /* Fall thru */ | |
c434dee6 | 2387 | |
26e41594 | 2388 | case R_X86_64_PLT32: |
c3320543 | 2389 | case R_X86_64_PLT32_BND: |
7b81dfbb | 2390 | case R_X86_64_PLTOFF64: |
26e41594 AM |
2391 | if (h != NULL) |
2392 | { | |
2393 | if (h->plt.refcount > 0) | |
2394 | h->plt.refcount -= 1; | |
04ebc307 L |
2395 | if (pointer_reloc && (sec->flags & SEC_READONLY) == 0) |
2396 | { | |
2397 | struct elf_x86_64_link_hash_entry *eh | |
2398 | = (struct elf_x86_64_link_hash_entry *) h; | |
2399 | if (eh->func_pointer_refcount > 0) | |
2400 | eh->func_pointer_refcount -= 1; | |
2401 | } | |
26e41594 AM |
2402 | } |
2403 | break; | |
70256ad8 | 2404 | |
26e41594 AM |
2405 | default: |
2406 | break; | |
2407 | } | |
2408 | } | |
70256ad8 | 2409 | |
b34976b6 | 2410 | return TRUE; |
70256ad8 AJ |
2411 | } |
2412 | ||
aec6b87e L |
2413 | /* Remove undefined weak symbol from the dynamic symbol table if it |
2414 | is resolved to 0. */ | |
2415 | ||
2416 | static bfd_boolean | |
2417 | elf_x86_64_fixup_symbol (struct bfd_link_info *info, | |
2418 | struct elf_link_hash_entry *h) | |
2419 | { | |
2420 | if (h->dynindx != -1 | |
2421 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, | |
2422 | elf_x86_64_hash_entry (h))) | |
2423 | { | |
2424 | h->dynindx = -1; | |
2425 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
2426 | h->dynstr_index); | |
2427 | } | |
2428 | return TRUE; | |
2429 | } | |
2430 | ||
70256ad8 AJ |
2431 | /* Adjust a symbol defined by a dynamic object and referenced by a |
2432 | regular object. The current definition is in some section of the | |
2433 | dynamic object, but we're not including those sections. We have to | |
2434 | change the definition to something the rest of the link can | |
407443a3 | 2435 | understand. */ |
70256ad8 | 2436 | |
b34976b6 | 2437 | static bfd_boolean |
351f65ca L |
2438 | elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
2439 | struct elf_link_hash_entry *h) | |
70256ad8 | 2440 | { |
351f65ca | 2441 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 | 2442 | asection *s; |
5ca5bb35 L |
2443 | struct elf_x86_64_link_hash_entry *eh; |
2444 | struct elf_dyn_relocs *p; | |
70256ad8 | 2445 | |
cbe950e9 L |
2446 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2447 | if (h->type == STT_GNU_IFUNC) | |
2448 | { | |
73bcf233 L |
2449 | /* All local STT_GNU_IFUNC references must be treate as local |
2450 | calls via local PLT. */ | |
5ca5bb35 L |
2451 | if (h->ref_regular |
2452 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2453 | { | |
73bcf233 | 2454 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2455 | struct elf_dyn_relocs **pp; |
2456 | ||
2457 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2458 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2459 | { | |
2460 | pc_count += p->pc_count; | |
2461 | p->count -= p->pc_count; | |
2462 | p->pc_count = 0; | |
73bcf233 | 2463 | count += p->count; |
5ca5bb35 L |
2464 | if (p->count == 0) |
2465 | *pp = p->next; | |
2466 | else | |
2467 | pp = &p->next; | |
2468 | } | |
2469 | ||
73bcf233 | 2470 | if (pc_count || count) |
5ca5bb35 L |
2471 | { |
2472 | h->needs_plt = 1; | |
5ca5bb35 | 2473 | h->non_got_ref = 1; |
a5479e5f L |
2474 | if (h->plt.refcount <= 0) |
2475 | h->plt.refcount = 1; | |
2476 | else | |
2477 | h->plt.refcount += 1; | |
5ca5bb35 L |
2478 | } |
2479 | } | |
2480 | ||
cbe950e9 L |
2481 | if (h->plt.refcount <= 0) |
2482 | { | |
2483 | h->plt.offset = (bfd_vma) -1; | |
2484 | h->needs_plt = 0; | |
2485 | } | |
2486 | return TRUE; | |
2487 | } | |
2488 | ||
70256ad8 AJ |
2489 | /* If this is a function, put it in the procedure linkage table. We |
2490 | will fill in the contents of the procedure linkage table later, | |
2491 | when we know the address of the .got section. */ | |
2492 | if (h->type == STT_FUNC | |
f5385ebf | 2493 | || h->needs_plt) |
70256ad8 | 2494 | { |
c434dee6 | 2495 | if (h->plt.refcount <= 0 |
27482721 AJ |
2496 | || SYMBOL_CALLS_LOCAL (info, h) |
2497 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2498 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 2499 | { |
70256ad8 AJ |
2500 | /* This case can occur if we saw a PLT32 reloc in an input |
2501 | file, but the symbol was never referred to by a dynamic | |
2502 | object, or if all references were garbage collected. In | |
2503 | such a case, we don't actually need to build a procedure | |
2504 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 2505 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2506 | h->needs_plt = 0; |
70256ad8 AJ |
2507 | } |
2508 | ||
b34976b6 | 2509 | return TRUE; |
70256ad8 | 2510 | } |
bbd7ec4a | 2511 | else |
c434dee6 AJ |
2512 | /* It's possible that we incorrectly decided a .plt reloc was |
2513 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
2514 | check_relocs. We can't decide accurately between function and | |
2515 | non-function syms in check-relocs; Objects loaded later in | |
2516 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2517 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
2518 | |
2519 | /* If this is a weak symbol, and there is a real definition, the | |
2520 | processor independent code will have arranged for us to see the | |
407443a3 | 2521 | real definition first, and we can just use the same value. */ |
f6e332e6 | 2522 | if (h->u.weakdef != NULL) |
70256ad8 | 2523 | { |
f6e332e6 AM |
2524 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2525 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2526 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2527 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 2528 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
bc696fd5 L |
2529 | { |
2530 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2531 | h->non_got_ref = h->u.weakdef->non_got_ref; | |
2532 | eh->needs_copy = h->u.weakdef->needs_copy; | |
2533 | } | |
b34976b6 | 2534 | return TRUE; |
70256ad8 AJ |
2535 | } |
2536 | ||
2537 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 2538 | is not a function. */ |
70256ad8 AJ |
2539 | |
2540 | /* If we are creating a shared library, we must presume that the | |
2541 | only references to the symbol are via the global offset table. | |
2542 | For such cases we need not do anything here; the relocations will | |
407443a3 | 2543 | be handled correctly by relocate_section. */ |
0e1862bb | 2544 | if (!bfd_link_executable (info)) |
b34976b6 | 2545 | return TRUE; |
70256ad8 AJ |
2546 | |
2547 | /* If there are no references to this symbol that do not use the | |
2548 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 2549 | if (!h->non_got_ref) |
b34976b6 | 2550 | return TRUE; |
70256ad8 | 2551 | |
c434dee6 AJ |
2552 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2553 | if (info->nocopyreloc) | |
2554 | { | |
f5385ebf | 2555 | h->non_got_ref = 0; |
b34976b6 | 2556 | return TRUE; |
c434dee6 AJ |
2557 | } |
2558 | ||
31c0ebfe | 2559 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 2560 | { |
351f65ca | 2561 | eh = (struct elf_x86_64_link_hash_entry *) h; |
d40d037c AJ |
2562 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2563 | { | |
2564 | s = p->sec->output_section; | |
2565 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2566 | break; | |
2567 | } | |
2568 | ||
2569 | /* If we didn't find any dynamic relocs in read-only sections, then | |
2570 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
2571 | if (p == NULL) | |
2572 | { | |
f5385ebf | 2573 | h->non_got_ref = 0; |
d40d037c AJ |
2574 | return TRUE; |
2575 | } | |
c434dee6 AJ |
2576 | } |
2577 | ||
70256ad8 | 2578 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 2579 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
2580 | an entry for this symbol in the .dynsym section. The dynamic |
2581 | object will contain position independent code, so all references | |
2582 | from the dynamic object to this symbol will go through the global | |
2583 | offset table. The dynamic linker will use the .dynsym entry to | |
2584 | determine the address it must put in the global offset table, so | |
2585 | both the dynamic object and the regular object will refer to the | |
2586 | same memory location for the variable. */ | |
2587 | ||
351f65ca | 2588 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2589 | if (htab == NULL) |
2590 | return FALSE; | |
70256ad8 AJ |
2591 | |
2592 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
2593 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 2594 | runtime process image. */ |
1d7e9d18 | 2595 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
70256ad8 | 2596 | { |
351f65ca L |
2597 | const struct elf_backend_data *bed; |
2598 | bed = get_elf_backend_data (info->output_bfd); | |
2599 | htab->srelbss->size += bed->s->sizeof_rela; | |
f5385ebf | 2600 | h->needs_copy = 1; |
70256ad8 AJ |
2601 | } |
2602 | ||
c434dee6 | 2603 | s = htab->sdynbss; |
70256ad8 | 2604 | |
6cabe1ea | 2605 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
70256ad8 AJ |
2606 | } |
2607 | ||
c434dee6 AJ |
2608 | /* Allocate space in .plt, .got and associated reloc sections for |
2609 | dynamic relocs. */ | |
2610 | ||
b34976b6 | 2611 | static bfd_boolean |
351f65ca | 2612 | elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
2613 | { |
2614 | struct bfd_link_info *info; | |
351f65ca L |
2615 | struct elf_x86_64_link_hash_table *htab; |
2616 | struct elf_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 2617 | struct elf_dyn_relocs *p; |
351f65ca | 2618 | const struct elf_backend_data *bed; |
eed180f8 | 2619 | unsigned int plt_entry_size; |
aec6b87e | 2620 | bfd_boolean resolved_to_zero; |
c434dee6 | 2621 | |
e92d460e | 2622 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2623 | return TRUE; |
c434dee6 | 2624 | |
351f65ca | 2625 | eh = (struct elf_x86_64_link_hash_entry *) h; |
e92d460e | 2626 | |
c434dee6 | 2627 | info = (struct bfd_link_info *) inf; |
351f65ca | 2628 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2629 | if (htab == NULL) |
2630 | return FALSE; | |
351f65ca | 2631 | bed = get_elf_backend_data (info->output_bfd); |
eed180f8 | 2632 | plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
c434dee6 | 2633 | |
aec6b87e L |
2634 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); |
2635 | ||
dd7e64d4 L |
2636 | /* We can't use the GOT PLT if pointer equality is needed since |
2637 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
2638 | linker won't update the GOT slot. We will get into an infinite | |
2639 | loop at run-time. */ | |
2640 | if (htab->plt_got != NULL | |
2641 | && h->type != STT_GNU_IFUNC | |
2642 | && !h->pointer_equality_needed | |
2643 | && h->plt.refcount > 0 | |
2644 | && h->got.refcount > 0) | |
2645 | { | |
2646 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
2647 | reloctions. */ | |
2648 | h->plt.offset = (bfd_vma) -1; | |
2649 | ||
2650 | /* Use the GOT PLT. */ | |
2651 | eh->plt_got.refcount = 1; | |
2652 | } | |
2653 | ||
04ebc307 L |
2654 | /* Clear the reference count of function pointer relocations if |
2655 | symbol isn't a normal function. */ | |
2656 | if (h->type != STT_FUNC) | |
2657 | eh->func_pointer_refcount = 0; | |
2658 | ||
cbe950e9 L |
2659 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2660 | here if it is defined and referenced in a non-shared object. */ | |
2661 | if (h->type == STT_GNU_IFUNC | |
2662 | && h->def_regular) | |
0ff2b86e L |
2663 | { |
2664 | if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, | |
2665 | &eh->dyn_relocs, | |
2df3368d | 2666 | &htab->readonly_dynrelocs_against_ifunc, |
0ff2b86e L |
2667 | plt_entry_size, |
2668 | plt_entry_size, | |
2669 | GOT_ENTRY_SIZE)) | |
2670 | { | |
2671 | asection *s = htab->plt_bnd; | |
2672 | if (h->plt.offset != (bfd_vma) -1 && s != NULL) | |
2673 | { | |
2674 | /* Use the .plt.bnd section if it is created. */ | |
2675 | eh->plt_bnd.offset = s->size; | |
2676 | ||
2677 | /* Make room for this entry in the .plt.bnd section. */ | |
2678 | s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
2679 | } | |
2680 | ||
2681 | return TRUE; | |
2682 | } | |
2683 | else | |
2684 | return FALSE; | |
2685 | } | |
04ebc307 L |
2686 | /* Don't create the PLT entry if there are only function pointer |
2687 | relocations which can be resolved at run-time. */ | |
cbe950e9 | 2688 | else if (htab->elf.dynamic_sections_created |
04ebc307 L |
2689 | && (h->plt.refcount > eh->func_pointer_refcount |
2690 | || eh->plt_got.refcount > 0)) | |
c434dee6 | 2691 | { |
25070364 L |
2692 | bfd_boolean use_plt_got; |
2693 | ||
04ebc307 L |
2694 | /* Clear the reference count of function pointer relocations |
2695 | if PLT is used. */ | |
2696 | eh->func_pointer_refcount = 0; | |
2697 | ||
8ded2ddc | 2698 | if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
25070364 L |
2699 | { |
2700 | /* Don't use the regular PLT for DF_BIND_NOW. */ | |
2701 | h->plt.offset = (bfd_vma) -1; | |
2702 | ||
2703 | /* Use the GOT PLT. */ | |
2704 | h->got.refcount = 1; | |
2705 | eh->plt_got.refcount = 1; | |
2706 | } | |
2707 | ||
2708 | use_plt_got = eh->plt_got.refcount > 0; | |
dd7e64d4 | 2709 | |
c434dee6 AJ |
2710 | /* Make sure this symbol is output as a dynamic symbol. |
2711 | Undefined weak syms won't yet be marked as dynamic. */ | |
2712 | if (h->dynindx == -1 | |
aec6b87e L |
2713 | && !h->forced_local |
2714 | && !resolved_to_zero) | |
c434dee6 | 2715 | { |
c152c796 | 2716 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2717 | return FALSE; |
c434dee6 AJ |
2718 | } |
2719 | ||
0e1862bb | 2720 | if (bfd_link_pic (info) |
27482721 | 2721 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
c434dee6 | 2722 | { |
6de2ae4a | 2723 | asection *s = htab->elf.splt; |
0ff2b86e | 2724 | asection *bnd_s = htab->plt_bnd; |
dd7e64d4 | 2725 | asection *got_s = htab->plt_got; |
c434dee6 | 2726 | |
7c1e8d3e L |
2727 | /* If this is the first .plt entry, make room for the special |
2728 | first entry. The .plt section is used by prelink to undo | |
2729 | prelinking for dynamic relocations. */ | |
2730 | if (s->size == 0) | |
2731 | s->size = plt_entry_size; | |
2732 | ||
dd7e64d4 L |
2733 | if (use_plt_got) |
2734 | eh->plt_got.offset = got_s->size; | |
2735 | else | |
2736 | { | |
2737 | h->plt.offset = s->size; | |
2738 | if (bnd_s) | |
2739 | eh->plt_bnd.offset = bnd_s->size; | |
2740 | } | |
c434dee6 AJ |
2741 | |
2742 | /* If this symbol is not defined in a regular file, and we are | |
2743 | not generating a shared library, then set the symbol to this | |
2744 | location in the .plt. This is required to make function | |
2745 | pointers compare as equal between the normal executable and | |
2746 | the shared library. */ | |
0e1862bb | 2747 | if (! bfd_link_pic (info) |
f5385ebf | 2748 | && !h->def_regular) |
c434dee6 | 2749 | { |
dd7e64d4 | 2750 | if (use_plt_got) |
0ff2b86e | 2751 | { |
dd7e64d4 L |
2752 | /* We need to make a call to the entry of the GOT PLT |
2753 | instead of regular PLT entry. */ | |
2754 | h->root.u.def.section = got_s; | |
2755 | h->root.u.def.value = eh->plt_got.offset; | |
0ff2b86e L |
2756 | } |
2757 | else | |
2758 | { | |
dd7e64d4 L |
2759 | if (bnd_s) |
2760 | { | |
2761 | /* We need to make a call to the entry of the second | |
2762 | PLT instead of regular PLT entry. */ | |
2763 | h->root.u.def.section = bnd_s; | |
2764 | h->root.u.def.value = eh->plt_bnd.offset; | |
2765 | } | |
2766 | else | |
2767 | { | |
2768 | h->root.u.def.section = s; | |
2769 | h->root.u.def.value = h->plt.offset; | |
2770 | } | |
0ff2b86e | 2771 | } |
c434dee6 AJ |
2772 | } |
2773 | ||
2774 | /* Make room for this entry. */ | |
dd7e64d4 L |
2775 | if (use_plt_got) |
2776 | got_s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
2777 | else | |
2778 | { | |
2779 | s->size += plt_entry_size; | |
2780 | if (bnd_s) | |
2781 | bnd_s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
c434dee6 | 2782 | |
dd7e64d4 L |
2783 | /* We also need to make an entry in the .got.plt section, |
2784 | which will be placed in the .got section by the linker | |
2785 | script. */ | |
2786 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; | |
c434dee6 | 2787 | |
aec6b87e L |
2788 | /* There should be no PLT relocation against resolved |
2789 | undefined weak symbol in executable. */ | |
2790 | if (!resolved_to_zero) | |
2791 | { | |
2792 | /* We also need to make an entry in the .rela.plt | |
2793 | section. */ | |
2794 | htab->elf.srelplt->size += bed->s->sizeof_rela; | |
2795 | htab->elf.srelplt->reloc_count++; | |
2796 | } | |
dd7e64d4 | 2797 | } |
c434dee6 AJ |
2798 | } |
2799 | else | |
2800 | { | |
13f42277 | 2801 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 2802 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2803 | h->needs_plt = 0; |
c434dee6 AJ |
2804 | } |
2805 | } | |
2806 | else | |
2807 | { | |
13f42277 | 2808 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 2809 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2810 | h->needs_plt = 0; |
c434dee6 AJ |
2811 | } |
2812 | ||
67a4f2b7 AO |
2813 | eh->tlsdesc_got = (bfd_vma) -1; |
2814 | ||
bffbf940 JJ |
2815 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
2816 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
2817 | if (h->got.refcount > 0 | |
0e1862bb | 2818 | && bfd_link_executable (info) |
bffbf940 | 2819 | && h->dynindx == -1 |
351f65ca | 2820 | && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) |
d8045f23 NC |
2821 | { |
2822 | h->got.offset = (bfd_vma) -1; | |
2823 | } | |
bffbf940 | 2824 | else if (h->got.refcount > 0) |
c434dee6 AJ |
2825 | { |
2826 | asection *s; | |
b34976b6 | 2827 | bfd_boolean dyn; |
351f65ca | 2828 | int tls_type = elf_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
2829 | |
2830 | /* Make sure this symbol is output as a dynamic symbol. | |
2831 | Undefined weak syms won't yet be marked as dynamic. */ | |
2832 | if (h->dynindx == -1 | |
aec6b87e L |
2833 | && !h->forced_local |
2834 | && !resolved_to_zero) | |
c434dee6 | 2835 | { |
c152c796 | 2836 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2837 | return FALSE; |
c434dee6 AJ |
2838 | } |
2839 | ||
67a4f2b7 AO |
2840 | if (GOT_TLS_GDESC_P (tls_type)) |
2841 | { | |
6de2ae4a | 2842 | eh->tlsdesc_got = htab->elf.sgotplt->size |
351f65ca | 2843 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2844 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2845 | h->got.offset = (bfd_vma) -2; |
2846 | } | |
2847 | if (! GOT_TLS_GDESC_P (tls_type) | |
2848 | || GOT_TLS_GD_P (tls_type)) | |
2849 | { | |
6de2ae4a | 2850 | s = htab->elf.sgot; |
67a4f2b7 AO |
2851 | h->got.offset = s->size; |
2852 | s->size += GOT_ENTRY_SIZE; | |
2853 | if (GOT_TLS_GD_P (tls_type)) | |
2854 | s->size += GOT_ENTRY_SIZE; | |
2855 | } | |
c434dee6 | 2856 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 | 2857 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
aec6b87e L |
2858 | and two if global. R_X86_64_GOTTPOFF needs one dynamic |
2859 | relocation. No dynamic relocation against resolved undefined | |
2860 | weak symbol in executable. */ | |
67a4f2b7 | 2861 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 2862 | || tls_type == GOT_TLS_IE) |
351f65ca | 2863 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 | 2864 | else if (GOT_TLS_GD_P (tls_type)) |
351f65ca | 2865 | htab->elf.srelgot->size += 2 * bed->s->sizeof_rela; |
67a4f2b7 | 2866 | else if (! GOT_TLS_GDESC_P (tls_type) |
aec6b87e L |
2867 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
2868 | && !resolved_to_zero) | |
67a4f2b7 | 2869 | || h->root.type != bfd_link_hash_undefweak) |
0e1862bb | 2870 | && (bfd_link_pic (info) |
27482721 | 2871 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
351f65ca | 2872 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2873 | if (GOT_TLS_GDESC_P (tls_type)) |
2874 | { | |
351f65ca | 2875 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2876 | htab->tlsdesc_plt = (bfd_vma) -1; |
2877 | } | |
c434dee6 AJ |
2878 | } |
2879 | else | |
2880 | h->got.offset = (bfd_vma) -1; | |
2881 | ||
c434dee6 | 2882 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2883 | return TRUE; |
c434dee6 AJ |
2884 | |
2885 | /* In the shared -Bsymbolic case, discard space allocated for | |
2886 | dynamic pc-relative relocs against symbols which turn out to be | |
2887 | defined in regular objects. For the normal shared case, discard | |
2888 | space for pc-relative relocs that have become local due to symbol | |
2889 | visibility changes. */ | |
2890 | ||
0e1862bb | 2891 | if (bfd_link_pic (info)) |
c434dee6 | 2892 | { |
27482721 AJ |
2893 | /* Relocs that use pc_count are those that appear on a call |
2894 | insn, or certain REL relocs that can generated via assembly. | |
2895 | We want calls to protected symbols to resolve directly to the | |
2896 | function rather than going via the plt. If people want | |
2897 | function pointer comparisons to work as expected then they | |
2898 | should avoid writing weird assembly. */ | |
2899 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 2900 | { |
e03a8ed8 | 2901 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
2902 | |
2903 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2904 | { | |
c3ce498c L |
2905 | p->count -= p->pc_count; |
2906 | p->pc_count = 0; | |
c434dee6 AJ |
2907 | if (p->count == 0) |
2908 | *pp = p->next; | |
2909 | else | |
2910 | pp = &p->next; | |
2911 | } | |
2912 | } | |
4e795f50 AM |
2913 | |
2914 | /* Also discard relocs on undefined weak syms with non-default | |
aec6b87e | 2915 | visibility or in PIE. */ |
31c0ebfe | 2916 | if (eh->dyn_relocs != NULL) |
22d606e9 | 2917 | { |
31c0ebfe L |
2918 | if (h->root.type == bfd_link_hash_undefweak) |
2919 | { | |
aec6b87e L |
2920 | /* Undefined weak symbol is never bound locally in shared |
2921 | library. */ | |
2922 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2923 | || resolved_to_zero) | |
31c0ebfe | 2924 | eh->dyn_relocs = NULL; |
31c0ebfe L |
2925 | else if (h->dynindx == -1 |
2926 | && ! h->forced_local | |
2927 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2928 | return FALSE; | |
2929 | } | |
9d1d54d5 L |
2930 | /* For PIE, discard space for pc-relative relocs against |
2931 | symbols which turn out to need copy relocs. */ | |
0e1862bb | 2932 | else if (bfd_link_executable (info) |
bc696fd5 | 2933 | && (h->needs_copy || eh->needs_copy) |
31c0ebfe L |
2934 | && h->def_dynamic |
2935 | && !h->def_regular) | |
9d1d54d5 L |
2936 | { |
2937 | struct elf_dyn_relocs **pp; | |
2938 | ||
2939 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2940 | { | |
2941 | if (p->pc_count != 0) | |
2942 | *pp = p->next; | |
2943 | else | |
2944 | pp = &p->next; | |
2945 | } | |
2946 | } | |
22d606e9 | 2947 | } |
d8045f23 | 2948 | } |
d40d037c | 2949 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
2950 | { |
2951 | /* For the non-shared case, discard space for relocs against | |
2952 | symbols which turn out to need copy relocs or are not | |
04ebc307 L |
2953 | dynamic. Keep dynamic relocations for run-time function |
2954 | pointer initialization. */ | |
c434dee6 | 2955 | |
aec6b87e L |
2956 | if ((!h->non_got_ref |
2957 | || eh->func_pointer_refcount > 0 | |
2958 | || (h->root.type == bfd_link_hash_undefweak | |
2959 | && !resolved_to_zero)) | |
f5385ebf AM |
2960 | && ((h->def_dynamic |
2961 | && !h->def_regular) | |
c434dee6 AJ |
2962 | || (htab->elf.dynamic_sections_created |
2963 | && (h->root.type == bfd_link_hash_undefweak | |
2964 | || h->root.type == bfd_link_hash_undefined)))) | |
2965 | { | |
2966 | /* Make sure this symbol is output as a dynamic symbol. | |
2967 | Undefined weak syms won't yet be marked as dynamic. */ | |
2968 | if (h->dynindx == -1 | |
d8045f23 | 2969 | && ! h->forced_local |
aec6b87e | 2970 | && ! resolved_to_zero |
d8045f23 NC |
2971 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
2972 | return FALSE; | |
c434dee6 AJ |
2973 | |
2974 | /* If that succeeded, we know we'll be keeping all the | |
2975 | relocs. */ | |
2976 | if (h->dynindx != -1) | |
2977 | goto keep; | |
2978 | } | |
2979 | ||
2980 | eh->dyn_relocs = NULL; | |
04ebc307 | 2981 | eh->func_pointer_refcount = 0; |
c434dee6 AJ |
2982 | |
2983 | keep: ; | |
2984 | } | |
2985 | ||
2986 | /* Finally, allocate space. */ | |
2987 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2988 | { | |
e7c33416 NC |
2989 | asection * sreloc; |
2990 | ||
cbe950e9 | 2991 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2992 | |
2993 | BFD_ASSERT (sreloc != NULL); | |
2994 | ||
351f65ca | 2995 | sreloc->size += p->count * bed->s->sizeof_rela; |
c434dee6 AJ |
2996 | } |
2997 | ||
b34976b6 | 2998 | return TRUE; |
c434dee6 AJ |
2999 | } |
3000 | ||
c25bc9fc L |
3001 | /* Allocate space in .plt, .got and associated reloc sections for |
3002 | local dynamic relocs. */ | |
3003 | ||
3004 | static bfd_boolean | |
351f65ca | 3005 | elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf) |
c25bc9fc L |
3006 | { |
3007 | struct elf_link_hash_entry *h | |
3008 | = (struct elf_link_hash_entry *) *slot; | |
3009 | ||
3010 | if (h->type != STT_GNU_IFUNC | |
3011 | || !h->def_regular | |
3012 | || !h->ref_regular | |
3013 | || !h->forced_local | |
3014 | || h->root.type != bfd_link_hash_defined) | |
3015 | abort (); | |
3016 | ||
351f65ca | 3017 | return elf_x86_64_allocate_dynrelocs (h, inf); |
c25bc9fc L |
3018 | } |
3019 | ||
c434dee6 AJ |
3020 | /* Find any dynamic relocs that apply to read-only sections. */ |
3021 | ||
b34976b6 | 3022 | static bfd_boolean |
351f65ca L |
3023 | elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h, |
3024 | void * inf) | |
c434dee6 | 3025 | { |
351f65ca | 3026 | struct elf_x86_64_link_hash_entry *eh; |
e03a8ed8 | 3027 | struct elf_dyn_relocs *p; |
c434dee6 | 3028 | |
aa715242 L |
3029 | /* Skip local IFUNC symbols. */ |
3030 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
3031 | return TRUE; | |
3032 | ||
351f65ca | 3033 | eh = (struct elf_x86_64_link_hash_entry *) h; |
c434dee6 AJ |
3034 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
3035 | { | |
3036 | asection *s = p->sec->output_section; | |
3037 | ||
3038 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
3039 | { | |
3040 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
3041 | ||
3042 | info->flags |= DF_TEXTREL; | |
3043 | ||
0e1862bb | 3044 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd L |
3045 | || info->error_textrel) |
3046 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"), | |
b70321a2 L |
3047 | p->sec->owner, h->root.root.string, |
3048 | p->sec); | |
3049 | ||
c434dee6 | 3050 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 3051 | return FALSE; |
c434dee6 AJ |
3052 | } |
3053 | } | |
b34976b6 | 3054 | return TRUE; |
c434dee6 AJ |
3055 | } |
3056 | ||
56ceb5b5 | 3057 | /* With the local symbol, foo, we convert |
daa67607 L |
3058 | mov foo@GOTPCREL(%rip), %reg |
3059 | to | |
3060 | lea foo(%rip), %reg | |
56ceb5b5 L |
3061 | and convert |
3062 | call/jmp *foo@GOTPCREL(%rip) | |
3063 | to | |
3064 | nop call foo/jmp foo nop | |
3065 | When PIC is false, convert | |
3066 | test %reg, foo@GOTPCREL(%rip) | |
3067 | to | |
3068 | test $foo, %reg | |
3069 | and convert | |
3070 | binop foo@GOTPCREL(%rip), %reg | |
3071 | to | |
3072 | binop $foo, %reg | |
3073 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
3074 | instructions. */ | |
daa67607 L |
3075 | |
3076 | static bfd_boolean | |
56ceb5b5 L |
3077 | elf_x86_64_convert_load (bfd *abfd, asection *sec, |
3078 | struct bfd_link_info *link_info) | |
daa67607 L |
3079 | { |
3080 | Elf_Internal_Shdr *symtab_hdr; | |
3081 | Elf_Internal_Rela *internal_relocs; | |
3082 | Elf_Internal_Rela *irel, *irelend; | |
3083 | bfd_byte *contents; | |
3084 | struct elf_x86_64_link_hash_table *htab; | |
3085 | bfd_boolean changed_contents; | |
3086 | bfd_boolean changed_relocs; | |
3087 | bfd_signed_vma *local_got_refcounts; | |
59cab532 | 3088 | bfd_vma maxpagesize; |
bae420ef L |
3089 | bfd_boolean is_pic; |
3090 | bfd_boolean require_reloc_pc32; | |
daa67607 L |
3091 | |
3092 | /* Don't even try to convert non-ELF outputs. */ | |
3093 | if (!is_elf_hash_table (link_info->hash)) | |
3094 | return FALSE; | |
3095 | ||
c1d11331 | 3096 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 3097 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
56ceb5b5 | 3098 | || sec->need_convert_load == 0 |
c8831961 | 3099 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
3100 | return TRUE; |
3101 | ||
3102 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3103 | ||
3104 | /* Load the relocations for this section. */ | |
3105 | internal_relocs = (_bfd_elf_link_read_relocs | |
3106 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
3107 | link_info->keep_memory)); | |
3108 | if (internal_relocs == NULL) | |
3109 | return FALSE; | |
3110 | ||
3111 | htab = elf_x86_64_hash_table (link_info); | |
3112 | changed_contents = FALSE; | |
3113 | changed_relocs = FALSE; | |
3114 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
59cab532 | 3115 | maxpagesize = get_elf_backend_data (abfd)->maxpagesize; |
daa67607 L |
3116 | |
3117 | /* Get the section contents. */ | |
3118 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
3119 | contents = elf_section_data (sec)->this_hdr.contents; | |
3120 | else | |
3121 | { | |
3122 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
3123 | goto error_return; | |
3124 | } | |
3125 | ||
bae420ef L |
3126 | is_pic = bfd_link_pic (link_info); |
3127 | ||
3128 | /* TRUE if we can convert only to R_X86_64_PC32. Enable it for | |
3129 | --no-relax. */ | |
3130 | require_reloc_pc32 | |
3131 | = link_info->disable_target_specific_optimizations > 1; | |
3132 | ||
daa67607 L |
3133 | irelend = internal_relocs + sec->reloc_count; |
3134 | for (irel = internal_relocs; irel < irelend; irel++) | |
3135 | { | |
3136 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
3137 | unsigned int r_symndx = htab->r_sym (irel->r_info); | |
3138 | unsigned int indx; | |
3139 | struct elf_link_hash_entry *h; | |
59cab532 L |
3140 | asection *tsec; |
3141 | char symtype; | |
3142 | bfd_vma toff, roff; | |
56ceb5b5 | 3143 | bfd_signed_vma raddend; |
dfc87947 | 3144 | unsigned int opcode; |
56ceb5b5 | 3145 | unsigned int modrm; |
bae420ef L |
3146 | bfd_boolean relocx; |
3147 | bfd_boolean to_reloc_pc32; | |
daa67607 | 3148 | |
bae420ef L |
3149 | relocx = (r_type == R_X86_64_GOTPCRELX |
3150 | || r_type == R_X86_64_REX_GOTPCRELX); | |
3151 | if (!relocx && r_type != R_X86_64_GOTPCREL) | |
daa67607 L |
3152 | continue; |
3153 | ||
59cab532 | 3154 | roff = irel->r_offset; |
56ceb5b5 L |
3155 | if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2)) |
3156 | continue; | |
59cab532 | 3157 | |
56ceb5b5 L |
3158 | raddend = irel->r_addend; |
3159 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
3160 | if (raddend != -4) | |
dfc87947 L |
3161 | continue; |
3162 | ||
3163 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
3164 | ||
bae420ef | 3165 | /* Convert mov to lea since it has been done for a while. */ |
dfc87947 | 3166 | if (opcode != 0x8b) |
56ceb5b5 L |
3167 | { |
3168 | /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX | |
bae420ef L |
3169 | for call, jmp or one of adc, add, and, cmp, or, sbb, sub, |
3170 | test, xor instructions. */ | |
3171 | if (!relocx) | |
56ceb5b5 | 3172 | continue; |
56ceb5b5 | 3173 | } |
59cab532 | 3174 | |
bae420ef L |
3175 | /* We convert only to R_X86_64_PC32: |
3176 | 1. Branch. | |
3177 | 2. R_X86_64_GOTPCREL since we can't modify REX byte. | |
3178 | 3. require_reloc_pc32 is true. | |
3179 | 4. PIC. | |
3180 | */ | |
3181 | to_reloc_pc32 = (opcode == 0xff | |
3182 | || !relocx | |
3183 | || require_reloc_pc32 | |
3184 | || is_pic); | |
3185 | ||
daa67607 L |
3186 | /* Get the symbol referred to by the reloc. */ |
3187 | if (r_symndx < symtab_hdr->sh_info) | |
3188 | { | |
3189 | Elf_Internal_Sym *isym; | |
3190 | ||
3191 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
3192 | abfd, r_symndx); | |
3193 | ||
59cab532 L |
3194 | symtype = ELF_ST_TYPE (isym->st_info); |
3195 | ||
56ceb5b5 L |
3196 | /* STT_GNU_IFUNC must keep GOTPCREL relocations and skip |
3197 | relocation against undefined symbols. */ | |
77697d41 L |
3198 | if (symtype == STT_GNU_IFUNC || isym->st_shndx == SHN_UNDEF) |
3199 | continue; | |
59cab532 | 3200 | |
77697d41 L |
3201 | if (isym->st_shndx == SHN_ABS) |
3202 | tsec = bfd_abs_section_ptr; | |
3203 | else if (isym->st_shndx == SHN_COMMON) | |
3204 | tsec = bfd_com_section_ptr; | |
3205 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
3206 | tsec = &_bfd_elf_large_com_section; | |
3207 | else | |
3208 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
3209 | ||
3210 | h = NULL; | |
3211 | toff = isym->st_value; | |
59cab532 L |
3212 | } |
3213 | else | |
3214 | { | |
3215 | indx = r_symndx - symtab_hdr->sh_info; | |
3216 | h = elf_sym_hashes (abfd)[indx]; | |
3217 | BFD_ASSERT (h != NULL); | |
3218 | ||
3219 | while (h->root.type == bfd_link_hash_indirect | |
3220 | || h->root.type == bfd_link_hash_warning) | |
3221 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3222 | ||
56ceb5b5 L |
3223 | /* STT_GNU_IFUNC must keep GOTPCREL relocations. We also |
3224 | avoid optimizing GOTPCREL relocations againt _DYNAMIC | |
3225 | since ld.so may use its link-time address. */ | |
bae420ef L |
3226 | if (h->type == STT_GNU_IFUNC) |
3227 | continue; | |
3228 | ||
3229 | /* Undefined weak symbol is only bound locally in executable | |
3230 | and its reference is resolved as 0 without relocation | |
3231 | overflow. We can only perform this optimization for | |
3232 | GOTPCRELX relocations since we need to modify REX byte. | |
3233 | It is OK convert mov with R_X86_64_GOTPCREL to | |
3234 | R_X86_64_PC32. */ | |
3235 | if ((relocx || opcode == 0x8b) | |
3236 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, | |
3237 | elf_x86_64_hash_entry (h))) | |
3238 | { | |
3239 | if (opcode == 0xff) | |
3240 | { | |
3241 | /* Skip for branch instructions since R_X86_64_PC32 | |
3242 | may overflow. */ | |
3243 | if (require_reloc_pc32) | |
3244 | continue; | |
3245 | } | |
3246 | else if (relocx) | |
3247 | { | |
3248 | /* For non-branch instructions, we can convert to | |
3249 | R_X86_64_32/R_X86_64_32S since we know if there | |
3250 | is a REX byte. */ | |
3251 | to_reloc_pc32 = FALSE; | |
3252 | } | |
3253 | ||
3254 | /* Since we don't know the current PC when PIC is true, | |
3255 | we can't convert to R_X86_64_PC32. */ | |
3256 | if (to_reloc_pc32 && is_pic) | |
3257 | continue; | |
3258 | ||
3259 | goto convert; | |
3260 | } | |
3261 | else if ((h->def_regular | |
3262 | || h->root.type == bfd_link_hash_defined | |
3263 | || h->root.type == bfd_link_hash_defweak) | |
3264 | && h != htab->elf.hdynamic | |
3265 | && SYMBOL_REFERENCES_LOCAL (link_info, h)) | |
7b7e7f1d | 3266 | { |
ead3d542 | 3267 | /* bfd_link_hash_new or bfd_link_hash_undefined is |
bae420ef L |
3268 | set by an assignment in a linker script in |
3269 | bfd_elf_record_link_assignment. */ | |
ead3d542 L |
3270 | if (h->def_regular |
3271 | && (h->root.type == bfd_link_hash_new | |
3272 | || h->root.type == bfd_link_hash_undefined)) | |
bae420ef L |
3273 | { |
3274 | /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */ | |
3275 | if (require_reloc_pc32) | |
3276 | continue; | |
3277 | goto convert; | |
3278 | } | |
7b7e7f1d L |
3279 | tsec = h->root.u.def.section; |
3280 | toff = h->root.u.def.value; | |
3281 | symtype = h->type; | |
3282 | } | |
77697d41 L |
3283 | else |
3284 | continue; | |
59cab532 L |
3285 | } |
3286 | ||
bae420ef L |
3287 | /* We can only estimate relocation overflow for R_X86_64_PC32. */ |
3288 | if (!to_reloc_pc32) | |
3289 | goto convert; | |
3290 | ||
59cab532 L |
3291 | if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE) |
3292 | { | |
3293 | /* At this stage in linking, no SEC_MERGE symbol has been | |
3294 | adjusted, so all references to such symbols need to be | |
3295 | passed through _bfd_merged_section_offset. (Later, in | |
3296 | relocate_section, all SEC_MERGE symbols *except* for | |
3297 | section symbols have been adjusted.) | |
3298 | ||
3299 | gas may reduce relocations against symbols in SEC_MERGE | |
3300 | sections to a relocation against the section symbol when | |
3301 | the original addend was zero. When the reloc is against | |
3302 | a section symbol we should include the addend in the | |
3303 | offset passed to _bfd_merged_section_offset, since the | |
3304 | location of interest is the original symbol. On the | |
3305 | other hand, an access to "sym+addend" where "sym" is not | |
3306 | a section symbol should not include the addend; Such an | |
3307 | access is presumed to be an offset from "sym"; The | |
3308 | location of interest is just "sym". */ | |
3309 | if (symtype == STT_SECTION) | |
56ceb5b5 | 3310 | toff += raddend; |
59cab532 L |
3311 | |
3312 | toff = _bfd_merged_section_offset (abfd, &tsec, | |
3313 | elf_section_data (tsec)->sec_info, | |
3314 | toff); | |
3315 | ||
3316 | if (symtype != STT_SECTION) | |
56ceb5b5 | 3317 | toff += raddend; |
59cab532 L |
3318 | } |
3319 | else | |
56ceb5b5 | 3320 | toff += raddend; |
59cab532 L |
3321 | |
3322 | /* Don't convert if R_X86_64_PC32 relocation overflows. */ | |
3323 | if (tsec->output_section == sec->output_section) | |
3324 | { | |
3325 | if ((toff - roff + 0x80000000) > 0xffffffff) | |
3326 | continue; | |
3327 | } | |
3328 | else | |
3329 | { | |
4a539596 | 3330 | bfd_signed_vma distance; |
59cab532 L |
3331 | |
3332 | /* At this point, we don't know the load addresses of TSEC | |
3333 | section nor SEC section. We estimate the distrance between | |
fb06f1c0 | 3334 | SEC and TSEC. We store the estimated distances in the |
4a539596 L |
3335 | compressed_size field of the output section, which is only |
3336 | used to decompress the compressed input section. */ | |
3337 | if (sec->output_section->compressed_size == 0) | |
59cab532 | 3338 | { |
4a539596 L |
3339 | asection *asect; |
3340 | bfd_size_type size = 0; | |
3341 | for (asect = link_info->output_bfd->sections; | |
3342 | asect != NULL; | |
3343 | asect = asect->next) | |
59cab532 | 3344 | { |
4a539596 L |
3345 | asection *i; |
3346 | for (i = asect->map_head.s; | |
3347 | i != NULL; | |
3348 | i = i->map_head.s) | |
3349 | { | |
3350 | size = align_power (size, i->alignment_power); | |
3351 | size += i->size; | |
3352 | } | |
3353 | asect->compressed_size = size; | |
59cab532 | 3354 | } |
daa67607 | 3355 | } |
59cab532 | 3356 | |
56ceb5b5 L |
3357 | /* Don't convert GOTPCREL relocations if TSEC isn't placed |
3358 | after SEC. */ | |
4a539596 L |
3359 | distance = (tsec->output_section->compressed_size |
3360 | - sec->output_section->compressed_size); | |
3361 | if (distance < 0) | |
59cab532 L |
3362 | continue; |
3363 | ||
3364 | /* Take PT_GNU_RELRO segment into account by adding | |
3365 | maxpagesize. */ | |
4a539596 | 3366 | if ((toff + distance + maxpagesize - roff + 0x80000000) |
59cab532 L |
3367 | > 0xffffffff) |
3368 | continue; | |
daa67607 L |
3369 | } |
3370 | ||
7b7e7f1d | 3371 | convert: |
56ceb5b5 L |
3372 | if (opcode == 0xff) |
3373 | { | |
3374 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
3375 | unsigned int nop; | |
caa65211 | 3376 | unsigned int disp; |
56ceb5b5 L |
3377 | bfd_vma nop_offset; |
3378 | ||
3379 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
3380 | R_X86_64_PC32. */ | |
3381 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
3382 | if (modrm == 0x25) | |
3383 | { | |
56ceb5b5 L |
3384 | /* Convert to "jmp foo nop". */ |
3385 | modrm = 0xe9; | |
3386 | nop = NOP_OPCODE; | |
3387 | nop_offset = irel->r_offset + 3; | |
3388 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
3389 | irel->r_offset -= 1; | |
3390 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
3391 | } | |
3392 | else | |
3393 | { | |
3394 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE | |
3395 | is a nop prefix. */ | |
3396 | modrm = 0xe8; | |
caa65211 L |
3397 | nop = link_info->call_nop_byte; |
3398 | if (link_info->call_nop_as_suffix) | |
3399 | { | |
3400 | nop_offset = irel->r_offset + 3; | |
3401 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
3402 | irel->r_offset -= 1; | |
3403 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
3404 | } | |
3405 | else | |
3406 | nop_offset = irel->r_offset - 2; | |
56ceb5b5 L |
3407 | } |
3408 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
3409 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
3410 | r_type = R_X86_64_PC32; | |
3411 | } | |
3412 | else | |
3413 | { | |
bae420ef L |
3414 | unsigned int rex; |
3415 | unsigned int rex_mask = REX_R; | |
3416 | ||
3417 | if (r_type == R_X86_64_REX_GOTPCRELX) | |
3418 | rex = bfd_get_8 (abfd, contents + roff - 3); | |
3419 | else | |
3420 | rex = 0; | |
3421 | ||
56ceb5b5 L |
3422 | if (opcode == 0x8b) |
3423 | { | |
bae420ef L |
3424 | if (to_reloc_pc32) |
3425 | { | |
3426 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
3427 | "lea foo(%rip), %reg". */ | |
3428 | opcode = 0x8d; | |
3429 | r_type = R_X86_64_PC32; | |
3430 | } | |
3431 | else | |
3432 | { | |
3433 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
3434 | "mov $foo, %reg". */ | |
3435 | opcode = 0xc7; | |
3436 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
3437 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
3438 | if ((rex & REX_W) != 0 | |
3439 | && ABI_64_P (link_info->output_bfd)) | |
3440 | { | |
3441 | /* Keep the REX_W bit in REX byte for LP64. */ | |
3442 | r_type = R_X86_64_32S; | |
3443 | goto rewrite_modrm_rex; | |
3444 | } | |
3445 | else | |
3446 | { | |
3447 | /* If the REX_W bit in REX byte isn't needed, | |
3448 | use R_X86_64_32 and clear the W bit to avoid | |
3449 | sign-extend imm32 to imm64. */ | |
3450 | r_type = R_X86_64_32; | |
3451 | /* Clear the W bit in REX byte. */ | |
3452 | rex_mask |= REX_W; | |
3453 | goto rewrite_modrm_rex; | |
3454 | } | |
3455 | } | |
56ceb5b5 L |
3456 | } |
3457 | else | |
3458 | { | |
bae420ef L |
3459 | /* R_X86_64_PC32 isn't supported. */ |
3460 | if (to_reloc_pc32) | |
3461 | continue; | |
3462 | ||
56ceb5b5 L |
3463 | modrm = bfd_get_8 (abfd, contents + roff - 1); |
3464 | if (opcode == 0x85) | |
3465 | { | |
3466 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
3467 | "test $foo, %reg". */ | |
3468 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
3469 | opcode = 0xf7; | |
3470 | } | |
3471 | else | |
3472 | { | |
3473 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
3474 | "binop $foo, %reg". */ | |
3475 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
3476 | opcode = 0x81; | |
3477 | } | |
bae420ef L |
3478 | |
3479 | /* Use R_X86_64_32 with 32-bit operand to avoid relocation | |
3480 | overflow when sign-extending imm32 to imm64. */ | |
3481 | r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32; | |
3482 | ||
3483 | rewrite_modrm_rex: | |
56ceb5b5 L |
3484 | bfd_put_8 (abfd, modrm, contents + roff - 1); |
3485 | ||
bae420ef | 3486 | if (rex) |
56ceb5b5 L |
3487 | { |
3488 | /* Move the R bit to the B bit in REX byte. */ | |
bae420ef | 3489 | rex = (rex & ~rex_mask) | (rex & REX_R) >> 2; |
56ceb5b5 L |
3490 | bfd_put_8 (abfd, rex, contents + roff - 3); |
3491 | } | |
bae420ef L |
3492 | |
3493 | /* No addend for R_X86_64_32/R_X86_64_32S relocations. */ | |
56ceb5b5 | 3494 | irel->r_addend = 0; |
56ceb5b5 L |
3495 | } |
3496 | ||
3497 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
3498 | } | |
3499 | ||
3500 | irel->r_info = htab->r_info (r_symndx, r_type); | |
59cab532 L |
3501 | changed_contents = TRUE; |
3502 | changed_relocs = TRUE; | |
3503 | ||
77697d41 | 3504 | if (h) |
59cab532 | 3505 | { |
77697d41 L |
3506 | if (h->got.refcount > 0) |
3507 | h->got.refcount -= 1; | |
59cab532 L |
3508 | } |
3509 | else | |
daa67607 | 3510 | { |
77697d41 L |
3511 | if (local_got_refcounts != NULL |
3512 | && local_got_refcounts[r_symndx] > 0) | |
3513 | local_got_refcounts[r_symndx] -= 1; | |
daa67607 L |
3514 | } |
3515 | } | |
3516 | ||
3517 | if (contents != NULL | |
3518 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3519 | { | |
3520 | if (!changed_contents && !link_info->keep_memory) | |
3521 | free (contents); | |
3522 | else | |
3523 | { | |
3524 | /* Cache the section contents for elf_link_input_bfd. */ | |
3525 | elf_section_data (sec)->this_hdr.contents = contents; | |
3526 | } | |
3527 | } | |
3528 | ||
3529 | if (elf_section_data (sec)->relocs != internal_relocs) | |
3530 | { | |
3531 | if (!changed_relocs) | |
3532 | free (internal_relocs); | |
3533 | else | |
3534 | elf_section_data (sec)->relocs = internal_relocs; | |
3535 | } | |
3536 | ||
3537 | return TRUE; | |
3538 | ||
3539 | error_return: | |
3540 | if (contents != NULL | |
3541 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3542 | free (contents); | |
3543 | if (internal_relocs != NULL | |
3544 | && elf_section_data (sec)->relocs != internal_relocs) | |
3545 | free (internal_relocs); | |
3546 | return FALSE; | |
3547 | } | |
3548 | ||
70256ad8 AJ |
3549 | /* Set the sizes of the dynamic sections. */ |
3550 | ||
b34976b6 | 3551 | static bfd_boolean |
351f65ca L |
3552 | elf_x86_64_size_dynamic_sections (bfd *output_bfd, |
3553 | struct bfd_link_info *info) | |
70256ad8 | 3554 | { |
351f65ca | 3555 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
3556 | bfd *dynobj; |
3557 | asection *s; | |
b34976b6 | 3558 | bfd_boolean relocs; |
c434dee6 | 3559 | bfd *ibfd; |
351f65ca | 3560 | const struct elf_backend_data *bed; |
70256ad8 | 3561 | |
351f65ca | 3562 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3563 | if (htab == NULL) |
3564 | return FALSE; | |
351f65ca | 3565 | bed = get_elf_backend_data (output_bfd); |
4dfe6ac6 | 3566 | |
c434dee6 AJ |
3567 | dynobj = htab->elf.dynobj; |
3568 | if (dynobj == NULL) | |
3569 | abort (); | |
70256ad8 | 3570 | |
c434dee6 | 3571 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
3572 | { |
3573 | /* Set the contents of the .interp section to the interpreter. */ | |
9b8b325a | 3574 | if (bfd_link_executable (info) && !info->nointerp) |
70256ad8 | 3575 | { |
3d4d4302 | 3576 | s = bfd_get_linker_section (dynobj, ".interp"); |
c434dee6 AJ |
3577 | if (s == NULL) |
3578 | abort (); | |
351f65ca L |
3579 | s->size = htab->dynamic_interpreter_size; |
3580 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
aec6b87e | 3581 | htab->interp = s; |
70256ad8 AJ |
3582 | } |
3583 | } | |
70256ad8 | 3584 | |
c434dee6 AJ |
3585 | /* Set up .got offsets for local syms, and space for local dynamic |
3586 | relocs. */ | |
c72f2fb2 | 3587 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
70256ad8 | 3588 | { |
c434dee6 AJ |
3589 | bfd_signed_vma *local_got; |
3590 | bfd_signed_vma *end_local_got; | |
bffbf940 | 3591 | char *local_tls_type; |
67a4f2b7 | 3592 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
3593 | bfd_size_type locsymcount; |
3594 | Elf_Internal_Shdr *symtab_hdr; | |
3595 | asection *srel; | |
70256ad8 | 3596 | |
0ffa91dd | 3597 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
3598 | continue; |
3599 | ||
c434dee6 | 3600 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 3601 | { |
e03a8ed8 | 3602 | struct elf_dyn_relocs *p; |
c434dee6 | 3603 | |
56ceb5b5 | 3604 | if (!elf_x86_64_convert_load (ibfd, s, info)) |
daa67607 L |
3605 | return FALSE; |
3606 | ||
e03a8ed8 | 3607 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 3608 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
3609 | p != NULL; |
3610 | p = p->next) | |
70256ad8 | 3611 | { |
c434dee6 AJ |
3612 | if (!bfd_is_abs_section (p->sec) |
3613 | && bfd_is_abs_section (p->sec->output_section)) | |
3614 | { | |
3615 | /* Input section has been discarded, either because | |
3616 | it is a copy of a linkonce section or due to | |
3617 | linker script /DISCARD/, so we'll be discarding | |
3618 | the relocs too. */ | |
3619 | } | |
3620 | else if (p->count != 0) | |
3621 | { | |
3622 | srel = elf_section_data (p->sec)->sreloc; | |
351f65ca | 3623 | srel->size += p->count * bed->s->sizeof_rela; |
4b819e1f L |
3624 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
3625 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
3626 | { |
3627 | info->flags |= DF_TEXTREL; | |
0e1862bb | 3628 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd L |
3629 | || info->error_textrel) |
3630 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), | |
b70321a2 | 3631 | p->sec->owner, p->sec); |
b70321a2 | 3632 | } |
c434dee6 | 3633 | } |
70256ad8 AJ |
3634 | } |
3635 | } | |
c434dee6 AJ |
3636 | |
3637 | local_got = elf_local_got_refcounts (ibfd); | |
3638 | if (!local_got) | |
3639 | continue; | |
3640 | ||
0ffa91dd | 3641 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
3642 | locsymcount = symtab_hdr->sh_info; |
3643 | end_local_got = local_got + locsymcount; | |
351f65ca L |
3644 | local_tls_type = elf_x86_64_local_got_tls_type (ibfd); |
3645 | local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd); | |
6de2ae4a L |
3646 | s = htab->elf.sgot; |
3647 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
3648 | for (; local_got < end_local_got; |
3649 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 3650 | { |
67a4f2b7 | 3651 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 3652 | if (*local_got > 0) |
70256ad8 | 3653 | { |
67a4f2b7 AO |
3654 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
3655 | { | |
6de2ae4a | 3656 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
351f65ca | 3657 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 3658 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
3659 | *local_got = (bfd_vma) -2; |
3660 | } | |
3661 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3662 | || GOT_TLS_GD_P (*local_tls_type)) | |
3663 | { | |
3664 | *local_got = s->size; | |
3665 | s->size += GOT_ENTRY_SIZE; | |
3666 | if (GOT_TLS_GD_P (*local_tls_type)) | |
3667 | s->size += GOT_ENTRY_SIZE; | |
3668 | } | |
0e1862bb | 3669 | if (bfd_link_pic (info) |
67a4f2b7 | 3670 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 3671 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
3672 | { |
3673 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
3674 | { | |
6de2ae4a | 3675 | htab->elf.srelplt->size |
351f65ca | 3676 | += bed->s->sizeof_rela; |
67a4f2b7 AO |
3677 | htab->tlsdesc_plt = (bfd_vma) -1; |
3678 | } | |
3679 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3680 | || GOT_TLS_GD_P (*local_tls_type)) | |
351f65ca | 3681 | srel->size += bed->s->sizeof_rela; |
67a4f2b7 | 3682 | } |
70256ad8 AJ |
3683 | } |
3684 | else | |
c434dee6 AJ |
3685 | *local_got = (bfd_vma) -1; |
3686 | } | |
3687 | } | |
70256ad8 | 3688 | |
bffbf940 JJ |
3689 | if (htab->tls_ld_got.refcount > 0) |
3690 | { | |
3691 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
3692 | relocs. */ | |
6de2ae4a L |
3693 | htab->tls_ld_got.offset = htab->elf.sgot->size; |
3694 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; | |
351f65ca | 3695 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
bffbf940 JJ |
3696 | } |
3697 | else | |
3698 | htab->tls_ld_got.offset = -1; | |
3699 | ||
c434dee6 AJ |
3700 | /* Allocate global sym .plt and .got entries, and space for global |
3701 | sym dynamic relocs. */ | |
351f65ca | 3702 | elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs, |
eb4ff4d6 | 3703 | info); |
c434dee6 | 3704 | |
c25bc9fc L |
3705 | /* Allocate .plt and .got entries, and space for local symbols. */ |
3706 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 3707 | elf_x86_64_allocate_local_dynrelocs, |
c25bc9fc L |
3708 | info); |
3709 | ||
67a4f2b7 AO |
3710 | /* For every jump slot reserved in the sgotplt, reloc_count is |
3711 | incremented. However, when we reserve space for TLS descriptors, | |
3712 | it's not incremented, so in order to compute the space reserved | |
3713 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 L |
3714 | slot size. |
3715 | ||
3716 | PR ld/13302: We start next_irelative_index at the end of .rela.plt | |
3717 | so that R_X86_64_IRELATIVE entries come last. */ | |
6de2ae4a | 3718 | if (htab->elf.srelplt) |
e1f98742 L |
3719 | { |
3720 | htab->sgotplt_jump_table_size | |
3721 | = elf_x86_64_compute_jump_table_size (htab); | |
3722 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
3723 | } | |
3724 | else if (htab->elf.irelplt) | |
3725 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
67a4f2b7 AO |
3726 | |
3727 | if (htab->tlsdesc_plt) | |
3728 | { | |
3729 | /* If we're not using lazy TLS relocations, don't generate the | |
3730 | PLT and GOT entries they require. */ | |
3731 | if ((info->flags & DF_BIND_NOW)) | |
3732 | htab->tlsdesc_plt = 0; | |
3733 | else | |
3734 | { | |
6de2ae4a L |
3735 | htab->tlsdesc_got = htab->elf.sgot->size; |
3736 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
3737 | /* Reserve room for the initial entry. |
3738 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a | 3739 | if (htab->elf.splt->size == 0) |
eed180f8 | 3740 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
6de2ae4a | 3741 | htab->tlsdesc_plt = htab->elf.splt->size; |
eed180f8 | 3742 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
67a4f2b7 AO |
3743 | } |
3744 | } | |
3745 | ||
a7b16ceb L |
3746 | if (htab->elf.sgotplt) |
3747 | { | |
3748 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
eed180f8 | 3749 | entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
3750 | if ((htab->elf.hgot == NULL |
3751 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
3752 | && (htab->elf.sgotplt->size |
3753 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
3754 | && (htab->elf.splt == NULL |
3755 | || htab->elf.splt->size == 0) | |
3756 | && (htab->elf.sgot == NULL | |
3757 | || htab->elf.sgot->size == 0) | |
3758 | && (htab->elf.iplt == NULL | |
3759 | || htab->elf.iplt->size == 0) | |
3760 | && (htab->elf.igotplt == NULL | |
3761 | || htab->elf.igotplt->size == 0)) | |
3762 | htab->elf.sgotplt->size = 0; | |
3763 | } | |
3764 | ||
9a2a56cc AM |
3765 | if (htab->plt_eh_frame != NULL |
3766 | && htab->elf.splt != NULL | |
3767 | && htab->elf.splt->size != 0 | |
3768 | && !bfd_is_abs_section (htab->elf.splt->output_section) | |
3769 | && _bfd_elf_eh_frame_present (info)) | |
3770 | { | |
3771 | const struct elf_x86_64_backend_data *arch_data | |
f8222080 | 3772 | = get_elf_x86_64_arch_data (bed); |
9a2a56cc AM |
3773 | htab->plt_eh_frame->size = arch_data->eh_frame_plt_size; |
3774 | } | |
3775 | ||
c434dee6 AJ |
3776 | /* We now have determined the sizes of the various dynamic sections. |
3777 | Allocate memory for them. */ | |
b34976b6 | 3778 | relocs = FALSE; |
c434dee6 AJ |
3779 | for (s = dynobj->sections; s != NULL; s = s->next) |
3780 | { | |
3781 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3782 | continue; | |
3783 | ||
6de2ae4a L |
3784 | if (s == htab->elf.splt |
3785 | || s == htab->elf.sgot | |
3786 | || s == htab->elf.sgotplt | |
3787 | || s == htab->elf.iplt | |
3788 | || s == htab->elf.igotplt | |
0ff2b86e | 3789 | || s == htab->plt_bnd |
dd7e64d4 | 3790 | || s == htab->plt_got |
9a2a56cc | 3791 | || s == htab->plt_eh_frame |
75ff4589 | 3792 | || s == htab->sdynbss) |
c434dee6 AJ |
3793 | { |
3794 | /* Strip this section if we don't need it; see the | |
3795 | comment below. */ | |
3796 | } | |
0112cd26 | 3797 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 3798 | { |
6de2ae4a | 3799 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 3800 | relocs = TRUE; |
c434dee6 AJ |
3801 | |
3802 | /* We use the reloc_count field as a counter if we need | |
3803 | to copy relocs into the output file. */ | |
6de2ae4a | 3804 | if (s != htab->elf.srelplt) |
67a4f2b7 | 3805 | s->reloc_count = 0; |
70256ad8 | 3806 | } |
c434dee6 | 3807 | else |
70256ad8 AJ |
3808 | { |
3809 | /* It's not one of our sections, so don't allocate space. */ | |
3810 | continue; | |
3811 | } | |
3812 | ||
eea6121a | 3813 | if (s->size == 0) |
70256ad8 | 3814 | { |
c434dee6 AJ |
3815 | /* If we don't need this section, strip it from the |
3816 | output file. This is mostly to handle .rela.bss and | |
3817 | .rela.plt. We must create both sections in | |
3818 | create_dynamic_sections, because they must be created | |
3819 | before the linker maps input sections to output | |
3820 | sections. The linker does that before | |
3821 | adjust_dynamic_symbol is called, and it is that | |
3822 | function which decides whether anything needs to go | |
3823 | into these sections. */ | |
3824 | ||
8423293d | 3825 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
3826 | continue; |
3827 | } | |
3828 | ||
c456f082 AM |
3829 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3830 | continue; | |
3831 | ||
70256ad8 AJ |
3832 | /* Allocate memory for the section contents. We use bfd_zalloc |
3833 | here in case unused entries are not reclaimed before the | |
3834 | section's contents are written out. This should not happen, | |
3835 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
3836 | of garbage. */ | |
eea6121a | 3837 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 3838 | if (s->contents == NULL) |
b34976b6 | 3839 | return FALSE; |
70256ad8 AJ |
3840 | } |
3841 | ||
e41b3a13 | 3842 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3843 | && htab->plt_eh_frame->contents != NULL) |
3844 | { | |
3845 | const struct elf_x86_64_backend_data *arch_data | |
f8222080 | 3846 | = get_elf_x86_64_arch_data (bed); |
9a2a56cc AM |
3847 | |
3848 | memcpy (htab->plt_eh_frame->contents, | |
3849 | arch_data->eh_frame_plt, htab->plt_eh_frame->size); | |
3850 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
3851 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
3852 | } | |
e41b3a13 | 3853 | |
c434dee6 | 3854 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
3855 | { |
3856 | /* Add some entries to the .dynamic section. We fill in the | |
351f65ca | 3857 | values later, in elf_x86_64_finish_dynamic_sections, but we |
70256ad8 | 3858 | must add the entries now so that we get the correct size for |
407443a3 | 3859 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 3860 | dynamic linker and used by the debugger. */ |
dc810e39 | 3861 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3862 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3863 | |
0e1862bb | 3864 | if (bfd_link_executable (info)) |
70256ad8 | 3865 | { |
dc810e39 | 3866 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3867 | return FALSE; |
70256ad8 AJ |
3868 | } |
3869 | ||
6de2ae4a | 3870 | if (htab->elf.splt->size != 0) |
70256ad8 | 3871 | { |
7c1e8d3e L |
3872 | /* DT_PLTGOT is used by prelink even if there is no PLT |
3873 | relocation. */ | |
3874 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
b34976b6 | 3875 | return FALSE; |
67a4f2b7 | 3876 | |
7c1e8d3e L |
3877 | if (htab->elf.srelplt->size != 0) |
3878 | { | |
3879 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
3880 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
3881 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
3882 | return FALSE; | |
3883 | } | |
3884 | ||
67a4f2b7 AO |
3885 | if (htab->tlsdesc_plt |
3886 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
3887 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
3888 | return FALSE; | |
70256ad8 AJ |
3889 | } |
3890 | ||
3891 | if (relocs) | |
3892 | { | |
dc810e39 AM |
3893 | if (!add_dynamic_entry (DT_RELA, 0) |
3894 | || !add_dynamic_entry (DT_RELASZ, 0) | |
351f65ca | 3895 | || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela)) |
b34976b6 | 3896 | return FALSE; |
70256ad8 | 3897 | |
c434dee6 AJ |
3898 | /* If any dynamic relocs apply to a read-only section, |
3899 | then we need a DT_TEXTREL entry. */ | |
3900 | if ((info->flags & DF_TEXTREL) == 0) | |
eed180f8 | 3901 | elf_link_hash_traverse (&htab->elf, |
351f65ca | 3902 | elf_x86_64_readonly_dynrelocs, |
eb4ff4d6 | 3903 | info); |
c434dee6 AJ |
3904 | |
3905 | if ((info->flags & DF_TEXTREL) != 0) | |
3906 | { | |
2df3368d | 3907 | if (htab->readonly_dynrelocs_against_ifunc) |
8efa2874 L |
3908 | { |
3909 | info->callbacks->einfo | |
3910 | (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n")); | |
3911 | bfd_set_error (bfd_error_bad_value); | |
3912 | return FALSE; | |
3913 | } | |
3914 | ||
c434dee6 | 3915 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 3916 | return FALSE; |
c434dee6 | 3917 | } |
70256ad8 AJ |
3918 | } |
3919 | } | |
dc810e39 | 3920 | #undef add_dynamic_entry |
70256ad8 | 3921 | |
b34976b6 | 3922 | return TRUE; |
70256ad8 AJ |
3923 | } |
3924 | ||
67a4f2b7 | 3925 | static bfd_boolean |
351f65ca L |
3926 | elf_x86_64_always_size_sections (bfd *output_bfd, |
3927 | struct bfd_link_info *info) | |
67a4f2b7 AO |
3928 | { |
3929 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3930 | ||
3931 | if (tls_sec) | |
3932 | { | |
3933 | struct elf_link_hash_entry *tlsbase; | |
3934 | ||
3935 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3936 | "_TLS_MODULE_BASE_", | |
3937 | FALSE, FALSE, FALSE); | |
3938 | ||
3939 | if (tlsbase && tlsbase->type == STT_TLS) | |
3940 | { | |
351f65ca | 3941 | struct elf_x86_64_link_hash_table *htab; |
67a4f2b7 AO |
3942 | struct bfd_link_hash_entry *bh = NULL; |
3943 | const struct elf_backend_data *bed | |
3944 | = get_elf_backend_data (output_bfd); | |
3945 | ||
351f65ca | 3946 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3947 | if (htab == NULL) |
3948 | return FALSE; | |
3949 | ||
67a4f2b7 AO |
3950 | if (!(_bfd_generic_link_add_one_symbol |
3951 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3952 | tls_sec, 0, NULL, FALSE, | |
3953 | bed->collect, &bh))) | |
3954 | return FALSE; | |
9f03412a | 3955 | |
4dfe6ac6 | 3956 | htab->tls_module_base = bh; |
9f03412a | 3957 | |
67a4f2b7 AO |
3958 | tlsbase = (struct elf_link_hash_entry *)bh; |
3959 | tlsbase->def_regular = 1; | |
3960 | tlsbase->other = STV_HIDDEN; | |
576fa883 | 3961 | tlsbase->root.linker_def = 1; |
67a4f2b7 AO |
3962 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
3963 | } | |
3964 | } | |
3965 | ||
3966 | return TRUE; | |
3967 | } | |
3968 | ||
9f03412a AO |
3969 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
3970 | executables. Rather than setting it to the beginning of the TLS | |
3971 | section, we have to set it to the end. This function may be called | |
3972 | multiple times, it is idempotent. */ | |
3973 | ||
3974 | static void | |
351f65ca | 3975 | elf_x86_64_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 3976 | { |
351f65ca | 3977 | struct elf_x86_64_link_hash_table *htab; |
9f03412a AO |
3978 | struct bfd_link_hash_entry *base; |
3979 | ||
0e1862bb | 3980 | if (!bfd_link_executable (info)) |
9f03412a AO |
3981 | return; |
3982 | ||
351f65ca | 3983 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3984 | if (htab == NULL) |
3985 | return; | |
9f03412a | 3986 | |
4dfe6ac6 NC |
3987 | base = htab->tls_module_base; |
3988 | if (base == NULL) | |
9f03412a AO |
3989 | return; |
3990 | ||
4dfe6ac6 | 3991 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
3992 | } |
3993 | ||
bffbf940 JJ |
3994 | /* Return the base VMA address which should be subtracted from real addresses |
3995 | when resolving @dtpoff relocation. | |
3996 | This is PT_TLS segment p_vaddr. */ | |
3997 | ||
3998 | static bfd_vma | |
351f65ca | 3999 | elf_x86_64_dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 4000 | { |
e1918d23 AM |
4001 | /* If tls_sec is NULL, we should have signalled an error already. */ |
4002 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 4003 | return 0; |
e1918d23 | 4004 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
4005 | } |
4006 | ||
4007 | /* Return the relocation value for @tpoff relocation | |
4008 | if STT_TLS virtual address is ADDRESS. */ | |
4009 | ||
4010 | static bfd_vma | |
351f65ca | 4011 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 4012 | { |
e1918d23 | 4013 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
4014 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
4015 | bfd_vma static_tls_size; | |
bffbf940 JJ |
4016 | |
4017 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 4018 | if (htab->tls_sec == NULL) |
bffbf940 | 4019 | return 0; |
7dc98aea RO |
4020 | |
4021 | /* Consider special static TLS alignment requirements. */ | |
4022 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
4023 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
4024 | } |
4025 | ||
90f487df L |
4026 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
4027 | branch? */ | |
4028 | ||
4029 | static bfd_boolean | |
4030 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
4031 | { | |
4032 | /* Opcode Instruction | |
4033 | 0xe8 call | |
4034 | 0xe9 jump | |
4035 | 0x0f 0x8x conditional jump */ | |
4036 | return ((offset > 0 | |
4037 | && (contents [offset - 1] == 0xe8 | |
4038 | || contents [offset - 1] == 0xe9)) | |
4039 | || (offset > 1 | |
4040 | && contents [offset - 2] == 0x0f | |
4041 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
4042 | } | |
4043 | ||
ef77d6af L |
4044 | static bfd_boolean |
4045 | elf_x86_64_need_pic (bfd *input_bfd, struct elf_link_hash_entry *h, | |
4046 | reloc_howto_type *howto) | |
4047 | { | |
4048 | const char *fmt; | |
4049 | const char *v; | |
4050 | const char *pic = ""; | |
4051 | ||
4052 | switch (ELF_ST_VISIBILITY (h->other)) | |
4053 | { | |
4054 | case STV_HIDDEN: | |
4055 | v = _("hidden symbol"); | |
4056 | break; | |
4057 | case STV_INTERNAL: | |
4058 | v = _("internal symbol"); | |
4059 | break; | |
4060 | case STV_PROTECTED: | |
4061 | v = _("protected symbol"); | |
4062 | break; | |
4063 | default: | |
4064 | v = _("symbol"); | |
4065 | pic = _("; recompile with -fPIC"); | |
4066 | break; | |
4067 | } | |
4068 | ||
4069 | if (h->def_regular) | |
4070 | fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s"); | |
4071 | else | |
4072 | fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s"); | |
4073 | ||
4074 | (*_bfd_error_handler) (fmt, input_bfd, howto->name, | |
4075 | v, h->root.root.string, pic); | |
4076 | bfd_set_error (bfd_error_bad_value); | |
4077 | return FALSE; | |
4078 | } | |
4079 | ||
8d88c4ca NC |
4080 | /* Relocate an x86_64 ELF section. */ |
4081 | ||
b34976b6 | 4082 | static bfd_boolean |
351f65ca L |
4083 | elf_x86_64_relocate_section (bfd *output_bfd, |
4084 | struct bfd_link_info *info, | |
4085 | bfd *input_bfd, | |
4086 | asection *input_section, | |
4087 | bfd_byte *contents, | |
4088 | Elf_Internal_Rela *relocs, | |
4089 | Elf_Internal_Sym *local_syms, | |
4090 | asection **local_sections) | |
8d88c4ca | 4091 | { |
351f65ca | 4092 | struct elf_x86_64_link_hash_table *htab; |
8d88c4ca NC |
4093 | Elf_Internal_Shdr *symtab_hdr; |
4094 | struct elf_link_hash_entry **sym_hashes; | |
4095 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 4096 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 4097 | Elf_Internal_Rela *rel; |
60f2e42e | 4098 | Elf_Internal_Rela *wrel; |
8d88c4ca | 4099 | Elf_Internal_Rela *relend; |
eed180f8 | 4100 | const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
8d88c4ca | 4101 | |
0ffa91dd NC |
4102 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
4103 | ||
351f65ca | 4104 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4105 | if (htab == NULL) |
4106 | return FALSE; | |
0ffa91dd | 4107 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
4108 | sym_hashes = elf_sym_hashes (input_bfd); |
4109 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
351f65ca | 4110 | local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 4111 | |
351f65ca | 4112 | elf_x86_64_set_tls_module_base (info); |
9f03412a | 4113 | |
60f2e42e | 4114 | rel = wrel = relocs; |
8d88c4ca | 4115 | relend = relocs + input_section->reloc_count; |
60f2e42e | 4116 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 4117 | { |
bffbf940 | 4118 | unsigned int r_type; |
8d88c4ca NC |
4119 | reloc_howto_type *howto; |
4120 | unsigned long r_symndx; | |
4121 | struct elf_link_hash_entry *h; | |
0ff2b86e | 4122 | struct elf_x86_64_link_hash_entry *eh; |
8d88c4ca NC |
4123 | Elf_Internal_Sym *sym; |
4124 | asection *sec; | |
0ff2b86e | 4125 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 4126 | bfd_vma relocation; |
b34976b6 | 4127 | bfd_boolean unresolved_reloc; |
8d88c4ca | 4128 | bfd_reloc_status_type r; |
bffbf940 | 4129 | int tls_type; |
0ff2b86e | 4130 | asection *base_got, *resolved_plt; |
1788fc08 | 4131 | bfd_vma st_size; |
aec6b87e | 4132 | bfd_boolean resolved_to_zero; |
8d88c4ca | 4133 | |
351f65ca | 4134 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
4135 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
4136 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
4137 | { |
4138 | if (wrel != rel) | |
4139 | *wrel = *rel; | |
4140 | continue; | |
4141 | } | |
8d88c4ca | 4142 | |
9911c0fc | 4143 | if (r_type >= (int) R_X86_64_standard) |
8da6118f | 4144 | { |
9911c0fc L |
4145 | (*_bfd_error_handler) |
4146 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), | |
4147 | input_bfd, input_section, r_type); | |
8da6118f | 4148 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 4149 | return FALSE; |
8da6118f | 4150 | } |
8d88c4ca | 4151 | |
d7921315 | 4152 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 4153 | || ABI_64_P (output_bfd)) |
d7921315 L |
4154 | howto = x86_64_elf_howto_table + r_type; |
4155 | else | |
4156 | howto = (x86_64_elf_howto_table | |
4157 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 4158 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
4159 | h = NULL; |
4160 | sym = NULL; | |
4161 | sec = NULL; | |
b34976b6 | 4162 | unresolved_reloc = FALSE; |
8d88c4ca | 4163 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
4164 | { |
4165 | sym = local_syms + r_symndx; | |
4166 | sec = local_sections[r_symndx]; | |
c434dee6 | 4167 | |
c25bc9fc L |
4168 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
4169 | &sec, rel); | |
1788fc08 | 4170 | st_size = sym->st_size; |
c25bc9fc L |
4171 | |
4172 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 4173 | if (!bfd_link_relocatable (info) |
351f65ca | 4174 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 4175 | { |
351f65ca L |
4176 | h = elf_x86_64_get_local_sym_hash (htab, input_bfd, |
4177 | rel, FALSE); | |
c25bc9fc L |
4178 | if (h == NULL) |
4179 | abort (); | |
4180 | ||
eed180f8 | 4181 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
4182 | h->root.u.def.value = sym->st_value; |
4183 | h->root.u.def.section = sec; | |
4184 | } | |
8da6118f | 4185 | } |
8d88c4ca | 4186 | else |
8da6118f | 4187 | { |
c9736ba0 | 4188 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 4189 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
c434dee6 | 4190 | |
b2a8e766 AM |
4191 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
4192 | r_symndx, symtab_hdr, sym_hashes, | |
4193 | h, sec, relocation, | |
62d887d4 | 4194 | unresolved_reloc, warned, ignored); |
1788fc08 | 4195 | st_size = h->size; |
8da6118f | 4196 | } |
ab96bf03 | 4197 | |
dbaa2011 | 4198 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
4199 | { |
4200 | _bfd_clear_contents (howto, input_bfd, input_section, | |
4201 | contents + rel->r_offset); | |
4202 | wrel->r_offset = rel->r_offset; | |
4203 | wrel->r_info = 0; | |
4204 | wrel->r_addend = 0; | |
4205 | ||
4206 | /* For ld -r, remove relocations in debug sections against | |
4207 | sections defined in discarded sections. Not done for | |
4208 | eh_frame editing code expects to be present. */ | |
4209 | if (bfd_link_relocatable (info) | |
4210 | && (input_section->flags & SEC_DEBUGGING)) | |
4211 | wrel--; | |
4212 | ||
4213 | continue; | |
4214 | } | |
ab96bf03 | 4215 | |
0e1862bb | 4216 | if (bfd_link_relocatable (info)) |
2d5da473 L |
4217 | { |
4218 | if (wrel != rel) | |
4219 | *wrel = *rel; | |
4220 | continue; | |
4221 | } | |
ab96bf03 | 4222 | |
1788fc08 | 4223 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 4224 | { |
1788fc08 L |
4225 | if (r_type == R_X86_64_64) |
4226 | { | |
4227 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
4228 | zero-extend it to 64bit if addend is zero. */ | |
4229 | r_type = R_X86_64_32; | |
4230 | memset (contents + rel->r_offset + 4, 0, 4); | |
4231 | } | |
4232 | else if (r_type == R_X86_64_SIZE64) | |
4233 | { | |
4234 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
4235 | zero-extend it to 64bit if addend is zero. */ | |
4236 | r_type = R_X86_64_SIZE32; | |
4237 | memset (contents + rel->r_offset + 4, 0, 4); | |
4238 | } | |
64d25c44 L |
4239 | } |
4240 | ||
0ff2b86e L |
4241 | eh = (struct elf_x86_64_link_hash_entry *) h; |
4242 | ||
cbe950e9 L |
4243 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
4244 | it here if it is defined in a non-shared object. */ | |
4245 | if (h != NULL | |
4246 | && h->type == STT_GNU_IFUNC | |
4247 | && h->def_regular) | |
4248 | { | |
cbe950e9 | 4249 | bfd_vma plt_index; |
4c544807 | 4250 | const char *name; |
cbe950e9 | 4251 | |
97dc35c8 L |
4252 | if ((input_section->flags & SEC_ALLOC) == 0) |
4253 | { | |
4254 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
4255 | sections because such sections are not SEC_ALLOC and | |
4256 | thus ld.so will not process them. */ | |
4257 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 4258 | continue; |
97dc35c8 L |
4259 | abort (); |
4260 | } | |
4261 | else if (h->plt.offset == (bfd_vma) -1) | |
cbe950e9 L |
4262 | abort (); |
4263 | ||
4264 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
4265 | if (htab->elf.splt != NULL) |
4266 | { | |
4267 | if (htab->plt_bnd != NULL) | |
4268 | { | |
4269 | resolved_plt = htab->plt_bnd; | |
4270 | plt_offset = eh->plt_bnd.offset; | |
4271 | } | |
4272 | else | |
4273 | { | |
4274 | resolved_plt = htab->elf.splt; | |
4275 | plt_offset = h->plt.offset; | |
4276 | } | |
4277 | } | |
4278 | else | |
4279 | { | |
4280 | resolved_plt = htab->elf.iplt; | |
4281 | plt_offset = h->plt.offset; | |
4282 | } | |
4283 | ||
4284 | relocation = (resolved_plt->output_section->vma | |
4285 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
4286 | |
4287 | switch (r_type) | |
4288 | { | |
4289 | default: | |
4c544807 L |
4290 | if (h->root.root.string) |
4291 | name = h->root.root.string; | |
4292 | else | |
4293 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
4294 | NULL); | |
cbe950e9 L |
4295 | (*_bfd_error_handler) |
4296 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
4297 | "symbol `%s' isn't handled by %s"), input_bfd, | |
ef77d6af | 4298 | howto->name, name, __FUNCTION__); |
cbe950e9 L |
4299 | bfd_set_error (bfd_error_bad_value); |
4300 | return FALSE; | |
4301 | ||
4302 | case R_X86_64_32S: | |
0e1862bb | 4303 | if (bfd_link_pic (info)) |
cbe950e9 | 4304 | abort (); |
710ab287 L |
4305 | goto do_relocation; |
4306 | ||
248775ba L |
4307 | case R_X86_64_32: |
4308 | if (ABI_64_P (output_bfd)) | |
4309 | goto do_relocation; | |
17672001 | 4310 | /* FALLTHROUGH */ |
eed180f8 | 4311 | case R_X86_64_64: |
710ab287 L |
4312 | if (rel->r_addend != 0) |
4313 | { | |
4c544807 L |
4314 | if (h->root.root.string) |
4315 | name = h->root.root.string; | |
4316 | else | |
4317 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
4318 | sym, NULL); | |
710ab287 L |
4319 | (*_bfd_error_handler) |
4320 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
4321 | "symbol `%s' has non-zero addend: %d"), | |
ef77d6af | 4322 | input_bfd, howto->name, name, rel->r_addend); |
710ab287 L |
4323 | bfd_set_error (bfd_error_bad_value); |
4324 | return FALSE; | |
4325 | } | |
4326 | ||
4327 | /* Generate dynamic relcoation only when there is a | |
c293fa49 | 4328 | non-GOT reference in a shared object. */ |
0e1862bb | 4329 | if (bfd_link_pic (info) && h->non_got_ref) |
710ab287 L |
4330 | { |
4331 | Elf_Internal_Rela outrel; | |
710ab287 L |
4332 | asection *sreloc; |
4333 | ||
c25bc9fc L |
4334 | /* Need a dynamic relocation to get the real function |
4335 | address. */ | |
710ab287 L |
4336 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
4337 | info, | |
4338 | input_section, | |
4339 | rel->r_offset); | |
4340 | if (outrel.r_offset == (bfd_vma) -1 | |
4341 | || outrel.r_offset == (bfd_vma) -2) | |
4342 | abort (); | |
4343 | ||
4344 | outrel.r_offset += (input_section->output_section->vma | |
4345 | + input_section->output_offset); | |
4346 | ||
4347 | if (h->dynindx == -1 | |
44c4ea11 | 4348 | || h->forced_local |
0e1862bb | 4349 | || bfd_link_executable (info)) |
710ab287 L |
4350 | { |
4351 | /* This symbol is resolved locally. */ | |
56b8aada L |
4352 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
4353 | outrel.r_addend = (h->root.u.def.value | |
4354 | + h->root.u.def.section->output_section->vma | |
4355 | + h->root.u.def.section->output_offset); | |
710ab287 L |
4356 | } |
4357 | else | |
4358 | { | |
351f65ca | 4359 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
4360 | outrel.r_addend = 0; |
4361 | } | |
4362 | ||
6de2ae4a | 4363 | sreloc = htab->elf.irelifunc; |
351f65ca | 4364 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
4365 | |
4366 | /* If this reloc is against an external symbol, we | |
4367 | do not want to fiddle with the addend. Otherwise, | |
4368 | we need to include the symbol value so that it | |
4369 | becomes an addend for the dynamic reloc. For an | |
4370 | internal symbol, we have updated addend. */ | |
56b8aada | 4371 | continue; |
710ab287 | 4372 | } |
17672001 | 4373 | /* FALLTHROUGH */ |
cbe950e9 | 4374 | case R_X86_64_PC32: |
c3320543 | 4375 | case R_X86_64_PC32_BND: |
cbe950e9 L |
4376 | case R_X86_64_PC64: |
4377 | case R_X86_64_PLT32: | |
c3320543 | 4378 | case R_X86_64_PLT32_BND: |
cbe950e9 L |
4379 | goto do_relocation; |
4380 | ||
4381 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
4382 | case R_X86_64_GOTPCRELX: |
4383 | case R_X86_64_REX_GOTPCRELX: | |
cbe950e9 | 4384 | case R_X86_64_GOTPCREL64: |
6de2ae4a | 4385 | base_got = htab->elf.sgot; |
cbe950e9 L |
4386 | off = h->got.offset; |
4387 | ||
7afd84dc | 4388 | if (base_got == NULL) |
cbe950e9 L |
4389 | abort (); |
4390 | ||
7afd84dc | 4391 | if (off == (bfd_vma) -1) |
cbe950e9 | 4392 | { |
7afd84dc L |
4393 | /* We can't use h->got.offset here to save state, or |
4394 | even just remember the offset, as finish_dynamic_symbol | |
4395 | would use that as offset into .got. */ | |
cbe950e9 | 4396 | |
6de2ae4a | 4397 | if (htab->elf.splt != NULL) |
7afd84dc | 4398 | { |
eed180f8 | 4399 | plt_index = h->plt.offset / plt_entry_size - 1; |
7afd84dc | 4400 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 4401 | base_got = htab->elf.sgotplt; |
7afd84dc | 4402 | } |
cbe950e9 L |
4403 | else |
4404 | { | |
eed180f8 | 4405 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 4406 | off = plt_index * GOT_ENTRY_SIZE; |
6de2ae4a | 4407 | base_got = htab->elf.igotplt; |
7afd84dc L |
4408 | } |
4409 | ||
4410 | if (h->dynindx == -1 | |
4411 | || h->forced_local | |
4412 | || info->symbolic) | |
4413 | { | |
eed180f8 | 4414 | /* This references the local defitionion. We must |
7afd84dc | 4415 | initialize this entry in the global offset table. |
eed180f8 | 4416 | Since the offset must always be a multiple of 8, |
7afd84dc L |
4417 | we use the least significant bit to record |
4418 | whether we have initialized it already. | |
4419 | ||
4420 | When doing a dynamic link, we create a .rela.got | |
4421 | relocation entry to initialize the value. This | |
4422 | is done in the finish_dynamic_symbol routine. */ | |
4423 | if ((off & 1) != 0) | |
4424 | off &= ~1; | |
4425 | else | |
4426 | { | |
4427 | bfd_put_64 (output_bfd, relocation, | |
4428 | base_got->contents + off); | |
4429 | /* Note that this is harmless for the GOTPLT64 | |
4430 | case, as -1 | 1 still is -1. */ | |
4431 | h->got.offset |= 1; | |
4432 | } | |
cbe950e9 L |
4433 | } |
4434 | } | |
4435 | ||
4436 | relocation = (base_got->output_section->vma | |
4437 | + base_got->output_offset + off); | |
4438 | ||
cbe950e9 L |
4439 | goto do_relocation; |
4440 | } | |
4441 | } | |
4442 | ||
aec6b87e L |
4443 | resolved_to_zero = (eh != NULL |
4444 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh)); | |
4445 | ||
70256ad8 AJ |
4446 | /* When generating a shared object, the relocations handled here are |
4447 | copied into the output file to be resolved at run time. */ | |
4448 | switch (r_type) | |
4449 | { | |
4450 | case R_X86_64_GOT32: | |
7b81dfbb | 4451 | case R_X86_64_GOT64: |
70256ad8 AJ |
4452 | /* Relocation is to the entry for this symbol in the global |
4453 | offset table. */ | |
70256ad8 | 4454 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
4455 | case R_X86_64_GOTPCRELX: |
4456 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
4457 | case R_X86_64_GOTPCREL64: |
4458 | /* Use global offset table entry as symbol value. */ | |
4459 | case R_X86_64_GOTPLT64: | |
553d1284 | 4460 | /* This is obsolete and treated the the same as GOT64. */ |
6de2ae4a | 4461 | base_got = htab->elf.sgot; |
7b81dfbb | 4462 | |
6de2ae4a | 4463 | if (htab->elf.sgot == NULL) |
c434dee6 | 4464 | abort (); |
053579d7 | 4465 | |
51e0a107 | 4466 | if (h != NULL) |
70256ad8 | 4467 | { |
b34976b6 | 4468 | bfd_boolean dyn; |
c434dee6 AJ |
4469 | |
4470 | off = h->got.offset; | |
7b81dfbb | 4471 | if (h->needs_plt |
eed180f8 | 4472 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
4473 | && off == (bfd_vma)-1) |
4474 | { | |
4475 | /* We can't use h->got.offset here to save | |
4476 | state, or even just remember the offset, as | |
4477 | finish_dynamic_symbol would use that as offset into | |
4478 | .got. */ | |
eed180f8 | 4479 | bfd_vma plt_index = h->plt.offset / plt_entry_size - 1; |
7b81dfbb | 4480 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 4481 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
4482 | } |
4483 | ||
c434dee6 | 4484 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 4485 | |
0e1862bb L |
4486 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
4487 | || (bfd_link_pic (info) | |
27482721 | 4488 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
4489 | || (ELF_ST_VISIBILITY (h->other) |
4490 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
4491 | { |
4492 | /* This is actually a static link, or it is a -Bsymbolic | |
4493 | link and the symbol is defined locally, or the symbol | |
407443a3 | 4494 | was forced to be local because of a version file. We |
51e0a107 JH |
4495 | must initialize this entry in the global offset table. |
4496 | Since the offset must always be a multiple of 8, we | |
4497 | use the least significant bit to record whether we | |
4498 | have initialized it already. | |
4499 | ||
4500 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
4501 | relocation entry to initialize the value. This is |
4502 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
4503 | if ((off & 1) != 0) |
4504 | off &= ~1; | |
4505 | else | |
4506 | { | |
4507 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
4508 | base_got->contents + off); |
4509 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 4510 | as -1 | 1 still is -1. */ |
51e0a107 JH |
4511 | h->got.offset |= 1; |
4512 | } | |
4513 | } | |
053579d7 | 4514 | else |
b34976b6 | 4515 | unresolved_reloc = FALSE; |
70256ad8 | 4516 | } |
51e0a107 JH |
4517 | else |
4518 | { | |
c434dee6 AJ |
4519 | if (local_got_offsets == NULL) |
4520 | abort (); | |
51e0a107 JH |
4521 | |
4522 | off = local_got_offsets[r_symndx]; | |
4523 | ||
4524 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
4525 | the least significant bit to record whether we have |
4526 | already generated the necessary reloc. */ | |
51e0a107 JH |
4527 | if ((off & 1) != 0) |
4528 | off &= ~1; | |
4529 | else | |
4530 | { | |
c434dee6 | 4531 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 4532 | base_got->contents + off); |
51e0a107 | 4533 | |
0e1862bb | 4534 | if (bfd_link_pic (info)) |
51e0a107 | 4535 | { |
947216bf | 4536 | asection *s; |
51e0a107 | 4537 | Elf_Internal_Rela outrel; |
70256ad8 | 4538 | |
51e0a107 JH |
4539 | /* We need to generate a R_X86_64_RELATIVE reloc |
4540 | for the dynamic linker. */ | |
6de2ae4a | 4541 | s = htab->elf.srelgot; |
947216bf | 4542 | if (s == NULL) |
c434dee6 | 4543 | abort (); |
51e0a107 | 4544 | |
7b81dfbb AJ |
4545 | outrel.r_offset = (base_got->output_section->vma |
4546 | + base_got->output_offset | |
51e0a107 | 4547 | + off); |
351f65ca | 4548 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
51e0a107 | 4549 | outrel.r_addend = relocation; |
351f65ca | 4550 | elf_append_rela (output_bfd, s, &outrel); |
51e0a107 JH |
4551 | } |
4552 | ||
4553 | local_got_offsets[r_symndx] |= 1; | |
4554 | } | |
51e0a107 | 4555 | } |
6a2bda3f | 4556 | |
c434dee6 AJ |
4557 | if (off >= (bfd_vma) -2) |
4558 | abort (); | |
4559 | ||
7b81dfbb AJ |
4560 | relocation = base_got->output_section->vma |
4561 | + base_got->output_offset + off; | |
56ceb5b5 L |
4562 | if (r_type != R_X86_64_GOTPCREL |
4563 | && r_type != R_X86_64_GOTPCRELX | |
4564 | && r_type != R_X86_64_REX_GOTPCRELX | |
4565 | && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
4566 | relocation -= htab->elf.sgotplt->output_section->vma |
4567 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 4568 | |
70256ad8 AJ |
4569 | break; |
4570 | ||
d6ab8113 JB |
4571 | case R_X86_64_GOTOFF64: |
4572 | /* Relocation is relative to the start of the global offset | |
4573 | table. */ | |
4574 | ||
3d949995 L |
4575 | /* Check to make sure it isn't a protected function or data |
4576 | symbol for shared library since it may not be local when | |
e3c0e327 L |
4577 | used as function address or with copy relocation. We also |
4578 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 4579 | if (bfd_link_pic (info) && h) |
d6ab8113 | 4580 | { |
e3c0e327 L |
4581 | if (!h->def_regular) |
4582 | { | |
4583 | const char *v; | |
4584 | ||
4585 | switch (ELF_ST_VISIBILITY (h->other)) | |
4586 | { | |
4587 | case STV_HIDDEN: | |
4588 | v = _("hidden symbol"); | |
4589 | break; | |
4590 | case STV_INTERNAL: | |
4591 | v = _("internal symbol"); | |
4592 | break; | |
4593 | case STV_PROTECTED: | |
4594 | v = _("protected symbol"); | |
4595 | break; | |
4596 | default: | |
4597 | v = _("symbol"); | |
4598 | break; | |
4599 | } | |
4600 | ||
4601 | (*_bfd_error_handler) | |
4602 | (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s `%s' can not be used when making a shared object"), | |
4603 | input_bfd, v, h->root.root.string); | |
4604 | bfd_set_error (bfd_error_bad_value); | |
4605 | return FALSE; | |
4606 | } | |
0e1862bb | 4607 | else if (!bfd_link_executable (info) |
e3c0e327 L |
4608 | && !SYMBOL_REFERENCES_LOCAL (info, h) |
4609 | && (h->type == STT_FUNC | |
4610 | || h->type == STT_OBJECT) | |
4611 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
4612 | { | |
4613 | (*_bfd_error_handler) | |
4614 | (_("%B: relocation R_X86_64_GOTOFF64 against protected %s `%s' can not be used when making a shared object"), | |
4615 | input_bfd, | |
4616 | h->type == STT_FUNC ? "function" : "data", | |
4617 | h->root.root.string); | |
4618 | bfd_set_error (bfd_error_bad_value); | |
d6ab8113 | 4619 | return FALSE; |
e3c0e327 | 4620 | } |
d6ab8113 JB |
4621 | } |
4622 | ||
4623 | /* Note that sgot is not involved in this | |
4624 | calculation. We always want the start of .got.plt. If we | |
4625 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
4626 | permitted by the ABI, we might have to change this | |
4627 | calculation. */ | |
6de2ae4a L |
4628 | relocation -= htab->elf.sgotplt->output_section->vma |
4629 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4630 | break; |
4631 | ||
4632 | case R_X86_64_GOTPC32: | |
7b81dfbb | 4633 | case R_X86_64_GOTPC64: |
d6ab8113 | 4634 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
4635 | relocation = htab->elf.sgotplt->output_section->vma |
4636 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4637 | unresolved_reloc = FALSE; |
4638 | break; | |
7b81dfbb AJ |
4639 | |
4640 | case R_X86_64_PLTOFF64: | |
4641 | /* Relocation is PLT entry relative to GOT. For local | |
4642 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 4643 | if (h != NULL |
7b81dfbb AJ |
4644 | /* See PLT32 handling. */ |
4645 | && h->plt.offset != (bfd_vma) -1 | |
6de2ae4a | 4646 | && htab->elf.splt != NULL) |
7b81dfbb | 4647 | { |
0ff2b86e L |
4648 | if (htab->plt_bnd != NULL) |
4649 | { | |
4650 | resolved_plt = htab->plt_bnd; | |
4651 | plt_offset = eh->plt_bnd.offset; | |
4652 | } | |
4653 | else | |
4654 | { | |
4655 | resolved_plt = htab->elf.splt; | |
4656 | plt_offset = h->plt.offset; | |
4657 | } | |
4658 | ||
4659 | relocation = (resolved_plt->output_section->vma | |
4660 | + resolved_plt->output_offset | |
4661 | + plt_offset); | |
7b81dfbb AJ |
4662 | unresolved_reloc = FALSE; |
4663 | } | |
4664 | ||
6de2ae4a L |
4665 | relocation -= htab->elf.sgotplt->output_section->vma |
4666 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 4667 | break; |
d6ab8113 | 4668 | |
70256ad8 | 4669 | case R_X86_64_PLT32: |
c3320543 | 4670 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
4671 | /* Relocation is to the entry for this symbol in the |
4672 | procedure linkage table. */ | |
4673 | ||
4674 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 4675 | without using the procedure linkage table. */ |
70256ad8 AJ |
4676 | if (h == NULL) |
4677 | break; | |
4678 | ||
dd7e64d4 L |
4679 | if ((h->plt.offset == (bfd_vma) -1 |
4680 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 4681 | || htab->elf.splt == NULL) |
70256ad8 AJ |
4682 | { |
4683 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
4684 | happens when statically linking PIC code, or when |
4685 | using -Bsymbolic. */ | |
70256ad8 AJ |
4686 | break; |
4687 | } | |
4688 | ||
dd7e64d4 | 4689 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 4690 | { |
dd7e64d4 L |
4691 | if (htab->plt_bnd != NULL) |
4692 | { | |
4693 | resolved_plt = htab->plt_bnd; | |
4694 | plt_offset = eh->plt_bnd.offset; | |
4695 | } | |
4696 | else | |
4697 | { | |
4698 | resolved_plt = htab->elf.splt; | |
4699 | plt_offset = h->plt.offset; | |
4700 | } | |
0ff2b86e L |
4701 | } |
4702 | else | |
4703 | { | |
dd7e64d4 L |
4704 | /* Use the GOT PLT. */ |
4705 | resolved_plt = htab->plt_got; | |
4706 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
4707 | } |
4708 | ||
4709 | relocation = (resolved_plt->output_section->vma | |
4710 | + resolved_plt->output_offset | |
4711 | + plt_offset); | |
b34976b6 | 4712 | unresolved_reloc = FALSE; |
70256ad8 AJ |
4713 | break; |
4714 | ||
1788fc08 L |
4715 | case R_X86_64_SIZE32: |
4716 | case R_X86_64_SIZE64: | |
1788fc08 L |
4717 | /* Set to symbol size. */ |
4718 | relocation = st_size; | |
4719 | goto direct; | |
4720 | ||
fd8ab9e5 AJ |
4721 | case R_X86_64_PC8: |
4722 | case R_X86_64_PC16: | |
4723 | case R_X86_64_PC32: | |
c3320543 | 4724 | case R_X86_64_PC32_BND: |
6333bc0d | 4725 | /* Don't complain about -fPIC if the symbol is undefined when |
aec6b87e L |
4726 | building executable unless it is unresolved weak symbol. */ |
4727 | if ((input_section->flags & SEC_ALLOC) != 0 | |
90f487df | 4728 | && (input_section->flags & SEC_READONLY) != 0 |
6333bc0d | 4729 | && h != NULL |
aec6b87e L |
4730 | && ((bfd_link_executable (info) |
4731 | && h->root.type == bfd_link_hash_undefweak | |
4732 | && !resolved_to_zero) | |
4733 | || (bfd_link_pic (info) | |
4734 | && !(bfd_link_pie (info) | |
4735 | && h->root.type == bfd_link_hash_undefined)))) | |
6610a52d | 4736 | { |
41bed6dd L |
4737 | bfd_boolean fail = FALSE; |
4738 | bfd_boolean branch | |
c3320543 L |
4739 | = ((r_type == R_X86_64_PC32 |
4740 | || r_type == R_X86_64_PC32_BND) | |
41bed6dd L |
4741 | && is_32bit_relative_branch (contents, rel->r_offset)); |
4742 | ||
4743 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
4744 | { | |
4745 | /* Symbol is referenced locally. Make sure it is | |
4746 | defined locally or for a branch. */ | |
4747 | fail = !h->def_regular && !branch; | |
4748 | } | |
aec6b87e | 4749 | else if (!(bfd_link_pie (info) |
bc696fd5 | 4750 | && (h->needs_copy || eh->needs_copy))) |
41bed6dd | 4751 | { |
9a926d55 L |
4752 | /* Symbol doesn't need copy reloc and isn't referenced |
4753 | locally. We only allow branch to symbol with | |
4754 | non-default visibility. */ | |
41bed6dd L |
4755 | fail = (!branch |
4756 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
4757 | } | |
4758 | ||
4759 | if (fail) | |
ef77d6af | 4760 | return elf_x86_64_need_pic (input_bfd, h, howto); |
6610a52d L |
4761 | } |
4762 | /* Fall through. */ | |
4763 | ||
70256ad8 AJ |
4764 | case R_X86_64_8: |
4765 | case R_X86_64_16: | |
4766 | case R_X86_64_32: | |
d6ab8113 | 4767 | case R_X86_64_PC64: |
6b3db546 | 4768 | case R_X86_64_64: |
80643fbc | 4769 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 4770 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 4771 | |
1788fc08 | 4772 | direct: |
b1e24c02 | 4773 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
4774 | break; |
4775 | ||
9a926d55 | 4776 | /* Don't copy a pc-relative relocation into the output file |
6333bc0d | 4777 | if the symbol needs copy reloc or the symbol is undefined |
04ebc307 | 4778 | when building executable. Copy dynamic function pointer |
aec6b87e L |
4779 | relocations. Don't generate dynamic relocations against |
4780 | resolved undefined weak symbols in PIE. */ | |
0e1862bb | 4781 | if ((bfd_link_pic (info) |
aec6b87e | 4782 | && !(bfd_link_pie (info) |
fd9edc90 | 4783 | && h != NULL |
6333bc0d L |
4784 | && (h->needs_copy |
4785 | || eh->needs_copy | |
4786 | || h->root.type == bfd_link_hash_undefined) | |
9a926d55 | 4787 | && IS_X86_64_PCREL_TYPE (r_type)) |
4bc6e03a | 4788 | && (h == NULL |
aec6b87e L |
4789 | || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
4790 | && !resolved_to_zero) | |
4791 | || h->root.type != bfd_link_hash_undefweak)) | |
1788fc08 L |
4792 | && ((! IS_X86_64_PCREL_TYPE (r_type) |
4793 | && r_type != R_X86_64_SIZE32 | |
4794 | && r_type != R_X86_64_SIZE64) | |
d8045f23 | 4795 | || ! SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c | 4796 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 4797 | && !bfd_link_pic (info) |
c434dee6 AJ |
4798 | && h != NULL |
4799 | && h->dynindx != -1 | |
aec6b87e L |
4800 | && (!h->non_got_ref |
4801 | || eh->func_pointer_refcount > 0 | |
4802 | || (h->root.type == bfd_link_hash_undefweak | |
4803 | && !resolved_to_zero)) | |
bae420ef L |
4804 | && ((h->def_dynamic && !h->def_regular) |
4805 | /* Undefined weak symbol is bound locally when | |
4806 | PIC is false. */ | |
0f88be7a | 4807 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
4808 | { |
4809 | Elf_Internal_Rela outrel; | |
b34976b6 | 4810 | bfd_boolean skip, relocate; |
c434dee6 | 4811 | asection *sreloc; |
70256ad8 AJ |
4812 | |
4813 | /* When generating a shared object, these relocations | |
4814 | are copied into the output file to be resolved at run | |
407443a3 | 4815 | time. */ |
b34976b6 AM |
4816 | skip = FALSE; |
4817 | relocate = FALSE; | |
70256ad8 | 4818 | |
c629eae0 JJ |
4819 | outrel.r_offset = |
4820 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 4821 | rel->r_offset); |
c629eae0 | 4822 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 4823 | skip = TRUE; |
0fb19cbc | 4824 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 4825 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
4826 | |
4827 | outrel.r_offset += (input_section->output_section->vma | |
4828 | + input_section->output_offset); | |
4829 | ||
4830 | if (skip) | |
0bb2d96a | 4831 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 4832 | |
fd8ab9e5 AJ |
4833 | /* h->dynindx may be -1 if this symbol was marked to |
4834 | become local. */ | |
4835 | else if (h != NULL | |
c434dee6 | 4836 | && h->dynindx != -1 |
d8045f23 | 4837 | && (IS_X86_64_PCREL_TYPE (r_type) |
4e0c91e4 L |
4838 | || !(bfd_link_executable (info) |
4839 | || SYMBOLIC_BIND (info, h)) | |
d8045f23 | 4840 | || ! h->def_regular)) |
70256ad8 | 4841 | { |
aec6b87e L |
4842 | if ((r_type != R_X86_64_PC64 && r_type != R_X86_64_64) |
4843 | && bfd_link_executable (info) | |
4844 | && h->root.type == bfd_link_hash_undefweak | |
4845 | && !resolved_to_zero) | |
4846 | return elf_x86_64_need_pic (input_bfd, h, howto); | |
351f65ca | 4847 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 4848 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
4849 | } |
4850 | else | |
4851 | { | |
4c10bbaa L |
4852 | /* This symbol is local, or marked to become local. |
4853 | When relocation overflow check is disabled, we | |
4854 | convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
4855 | if (r_type == htab->pointer_r_type | |
4856 | || (r_type == R_X86_64_32 | |
4857 | && info->no_reloc_overflow_check)) | |
607c0e09 | 4858 | { |
b34976b6 | 4859 | relocate = TRUE; |
351f65ca | 4860 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
4861 | outrel.r_addend = relocation + rel->r_addend; |
4862 | } | |
64d25c44 L |
4863 | else if (r_type == R_X86_64_64 |
4864 | && !ABI_64_P (output_bfd)) | |
4865 | { | |
4866 | relocate = TRUE; | |
4867 | outrel.r_info = htab->r_info (0, | |
4868 | R_X86_64_RELATIVE64); | |
4869 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
4870 | /* Check addend overflow. */ |
4871 | if ((outrel.r_addend & 0x80000000) | |
4872 | != (rel->r_addend & 0x80000000)) | |
4873 | { | |
4874 | const char *name; | |
268a8d3a | 4875 | int addend = rel->r_addend; |
8cf0d2dd L |
4876 | if (h && h->root.root.string) |
4877 | name = h->root.root.string; | |
4878 | else | |
4879 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
4880 | sym, NULL); | |
6f2c9068 L |
4881 | if (addend < 0) |
4882 | (*_bfd_error_handler) | |
268a8d3a | 4883 | (_("%B: addend -0x%x in relocation %s against " |
6f2c9068 L |
4884 | "symbol `%s' at 0x%lx in section `%A' is " |
4885 | "out of range"), | |
4886 | input_bfd, input_section, addend, | |
ef77d6af L |
4887 | howto->name, name, |
4888 | (unsigned long) rel->r_offset); | |
6f2c9068 L |
4889 | else |
4890 | (*_bfd_error_handler) | |
268a8d3a | 4891 | (_("%B: addend 0x%x in relocation %s against " |
6f2c9068 L |
4892 | "symbol `%s' at 0x%lx in section `%A' is " |
4893 | "out of range"), | |
4894 | input_bfd, input_section, addend, | |
ef77d6af L |
4895 | howto->name, name, |
4896 | (unsigned long) rel->r_offset); | |
8cf0d2dd L |
4897 | bfd_set_error (bfd_error_bad_value); |
4898 | return FALSE; | |
4899 | } | |
64d25c44 | 4900 | } |
607c0e09 AS |
4901 | else |
4902 | { | |
4903 | long sindx; | |
4904 | ||
8517fae7 | 4905 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
4906 | sindx = 0; |
4907 | else if (sec == NULL || sec->owner == NULL) | |
4908 | { | |
4909 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 4910 | return FALSE; |
607c0e09 AS |
4911 | } |
4912 | else | |
4913 | { | |
4914 | asection *osec; | |
4915 | ||
74541ad4 AM |
4916 | /* We are turning this relocation into one |
4917 | against a section symbol. It would be | |
4918 | proper to subtract the symbol's value, | |
4919 | osec->vma, from the emitted reloc addend, | |
4920 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
4921 | osec = sec->output_section; |
4922 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
4923 | if (sindx == 0) |
4924 | { | |
4925 | asection *oi = htab->elf.text_index_section; | |
4926 | sindx = elf_section_data (oi)->dynindx; | |
4927 | } | |
4928 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
4929 | } |
4930 | ||
351f65ca | 4931 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
4932 | outrel.r_addend = relocation + rel->r_addend; |
4933 | } | |
70256ad8 AJ |
4934 | } |
4935 | ||
cbe950e9 | 4936 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 4937 | |
62d78908 L |
4938 | if (sreloc == NULL || sreloc->contents == NULL) |
4939 | { | |
4940 | r = bfd_reloc_notsupported; | |
4941 | goto check_relocation_error; | |
4942 | } | |
c434dee6 | 4943 | |
351f65ca | 4944 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
4945 | |
4946 | /* If this reloc is against an external symbol, we do | |
4947 | not want to fiddle with the addend. Otherwise, we | |
4948 | need to include the symbol value so that it becomes | |
4949 | an addend for the dynamic reloc. */ | |
0f88be7a | 4950 | if (! relocate) |
70256ad8 AJ |
4951 | continue; |
4952 | } | |
4953 | ||
4954 | break; | |
4955 | ||
bffbf940 | 4956 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
4957 | case R_X86_64_GOTPC32_TLSDESC: |
4958 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 4959 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
4960 | tls_type = GOT_UNKNOWN; |
4961 | if (h == NULL && local_got_offsets) | |
351f65ca | 4962 | tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 4963 | else if (h != NULL) |
351f65ca | 4964 | tls_type = elf_x86_64_hash_entry (h)->tls_type; |
142411ca | 4965 | |
351f65ca L |
4966 | if (! elf_x86_64_tls_transition (info, input_bfd, |
4967 | input_section, contents, | |
4968 | symtab_hdr, sym_hashes, | |
4969 | &r_type, tls_type, rel, | |
4970 | relend, h, r_symndx)) | |
534a31f6 | 4971 | return FALSE; |
bffbf940 JJ |
4972 | |
4973 | if (r_type == R_X86_64_TPOFF32) | |
4974 | { | |
142411ca L |
4975 | bfd_vma roff = rel->r_offset; |
4976 | ||
bffbf940 | 4977 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 4978 | |
351f65ca | 4979 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 4980 | { |
52bc799a | 4981 | /* GD->LE transition. For 64bit, change |
abcf1d52 | 4982 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
a3fadc9a | 4983 | .word 0x6666; rex64; call __tls_get_addr |
52bc799a | 4984 | into: |
bffbf940 | 4985 | movq %fs:0, %rax |
52bc799a L |
4986 | leaq foo@tpoff(%rax), %rax |
4987 | For 32bit, change | |
4988 | leaq foo@tlsgd(%rip), %rdi | |
4989 | .word 0x6666; rex64; call __tls_get_addr | |
4990 | into: | |
4991 | movl %fs:0, %eax | |
5c98a14e JJ |
4992 | leaq foo@tpoff(%rax), %rax |
4993 | For largepic, change: | |
4994 | leaq foo@tlsgd(%rip), %rdi | |
4995 | movabsq $__tls_get_addr@pltoff, %rax | |
4996 | addq %rbx, %rax | |
4997 | call *%rax | |
4998 | into: | |
4999 | movq %fs:0, %rax | |
5000 | leaq foo@tpoff(%rax), %rax | |
5001 | nopw 0x0(%rax,%rax,1) */ | |
5002 | int largepic = 0; | |
5003 | if (ABI_64_P (output_bfd) | |
5004 | && contents[roff + 5] == (bfd_byte) '\xb8') | |
5005 | { | |
5006 | memcpy (contents + roff - 3, | |
5007 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
5008 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
5009 | largepic = 1; | |
5010 | } | |
5011 | else if (ABI_64_P (output_bfd)) | |
52bc799a L |
5012 | memcpy (contents + roff - 4, |
5013 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
5014 | 16); | |
5015 | else | |
5016 | memcpy (contents + roff - 3, | |
5017 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
5018 | 15); | |
eb4ff4d6 | 5019 | bfd_put_32 (output_bfd, |
351f65ca | 5020 | elf_x86_64_tpoff (info, relocation), |
5c98a14e JJ |
5021 | contents + roff + 8 + largepic); |
5022 | /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
bffbf940 | 5023 | rel++; |
60f2e42e | 5024 | wrel++; |
bffbf940 JJ |
5025 | continue; |
5026 | } | |
351f65ca | 5027 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
5028 | { |
5029 | /* GDesc -> LE transition. | |
5030 | It's originally something like: | |
5031 | leaq x@tlsdesc(%rip), %rax | |
5032 | ||
5033 | Change it to: | |
c9736ba0 | 5034 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 5035 | |
c9736ba0 | 5036 | unsigned int val, type; |
67a4f2b7 | 5037 | |
67a4f2b7 | 5038 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 5039 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
5040 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
5041 | contents + roff - 3); | |
5042 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
5043 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
5044 | contents + roff - 1); | |
eb4ff4d6 | 5045 | bfd_put_32 (output_bfd, |
351f65ca | 5046 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
5047 | contents + roff); |
5048 | continue; | |
5049 | } | |
351f65ca | 5050 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
5051 | { |
5052 | /* GDesc -> LE transition. | |
5053 | It's originally: | |
5054 | call *(%rax) | |
5055 | Turn it into: | |
142411ca | 5056 | xchg %ax,%ax. */ |
10efb593 | 5057 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
5058 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
5059 | continue; | |
5060 | } | |
351f65ca | 5061 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 5062 | { |
bffbf940 | 5063 | /* IE->LE transition: |
cf61b747 | 5064 | For 64bit, originally it can be one of: |
bffbf940 JJ |
5065 | movq foo@gottpoff(%rip), %reg |
5066 | addq foo@gottpoff(%rip), %reg | |
5067 | We change it into: | |
5068 | movq $foo, %reg | |
5069 | leaq foo(%reg), %reg | |
cf61b747 L |
5070 | addq $foo, %reg. |
5071 | For 32bit, originally it can be one of: | |
5072 | movq foo@gottpoff(%rip), %reg | |
5073 | addl foo@gottpoff(%rip), %reg | |
5074 | We change it into: | |
5075 | movq $foo, %reg | |
5076 | leal foo(%reg), %reg | |
5077 | addl $foo, %reg. */ | |
142411ca L |
5078 | |
5079 | unsigned int val, type, reg; | |
5080 | ||
cf61b747 L |
5081 | if (roff >= 3) |
5082 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
5083 | else | |
5084 | val = 0; | |
142411ca L |
5085 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
5086 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 5087 | reg >>= 3; |
bffbf940 JJ |
5088 | if (type == 0x8b) |
5089 | { | |
5090 | /* movq */ | |
5091 | if (val == 0x4c) | |
5092 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 5093 | contents + roff - 3); |
4a4c5f25 L |
5094 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5095 | bfd_put_8 (output_bfd, 0x41, | |
5096 | contents + roff - 3); | |
bffbf940 | 5097 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 5098 | contents + roff - 2); |
bffbf940 | 5099 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 5100 | contents + roff - 1); |
bffbf940 JJ |
5101 | } |
5102 | else if (reg == 4) | |
5103 | { | |
cf61b747 L |
5104 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
5105 | is special */ | |
bffbf940 JJ |
5106 | if (val == 0x4c) |
5107 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 5108 | contents + roff - 3); |
4a4c5f25 L |
5109 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5110 | bfd_put_8 (output_bfd, 0x41, | |
5111 | contents + roff - 3); | |
bffbf940 | 5112 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 5113 | contents + roff - 2); |
bffbf940 | 5114 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 5115 | contents + roff - 1); |
bffbf940 JJ |
5116 | } |
5117 | else | |
5118 | { | |
cf61b747 | 5119 | /* addq/addl -> leaq/leal */ |
bffbf940 JJ |
5120 | if (val == 0x4c) |
5121 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 5122 | contents + roff - 3); |
4a4c5f25 L |
5123 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5124 | bfd_put_8 (output_bfd, 0x45, | |
5125 | contents + roff - 3); | |
bffbf940 | 5126 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 5127 | contents + roff - 2); |
bffbf940 | 5128 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 5129 | contents + roff - 1); |
bffbf940 | 5130 | } |
eb4ff4d6 | 5131 | bfd_put_32 (output_bfd, |
351f65ca | 5132 | elf_x86_64_tpoff (info, relocation), |
142411ca | 5133 | contents + roff); |
bffbf940 JJ |
5134 | continue; |
5135 | } | |
142411ca L |
5136 | else |
5137 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
5138 | } |
5139 | ||
6de2ae4a | 5140 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
5141 | abort (); |
5142 | ||
5143 | if (h != NULL) | |
67a4f2b7 AO |
5144 | { |
5145 | off = h->got.offset; | |
351f65ca | 5146 | offplt = elf_x86_64_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 5147 | } |
bffbf940 JJ |
5148 | else |
5149 | { | |
5150 | if (local_got_offsets == NULL) | |
5151 | abort (); | |
5152 | ||
5153 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 5154 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
5155 | } |
5156 | ||
5157 | if ((off & 1) != 0) | |
5158 | off &= ~1; | |
26e41594 | 5159 | else |
bffbf940 JJ |
5160 | { |
5161 | Elf_Internal_Rela outrel; | |
bffbf940 | 5162 | int dr_type, indx; |
67a4f2b7 | 5163 | asection *sreloc; |
bffbf940 | 5164 | |
6de2ae4a | 5165 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
5166 | abort (); |
5167 | ||
67a4f2b7 AO |
5168 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
5169 | ||
5170 | if (GOT_TLS_GDESC_P (tls_type)) | |
5171 | { | |
351f65ca | 5172 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 5173 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
5174 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
5175 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
5176 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
5177 | + offplt |
5178 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 5179 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 5180 | if (indx == 0) |
351f65ca | 5181 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
67a4f2b7 AO |
5182 | else |
5183 | outrel.r_addend = 0; | |
351f65ca | 5184 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
5185 | } |
5186 | ||
6de2ae4a | 5187 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 5188 | |
6de2ae4a L |
5189 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5190 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 5191 | |
67a4f2b7 | 5192 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 5193 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
5194 | else if (GOT_TLS_GDESC_P (tls_type)) |
5195 | goto dr_done; | |
bffbf940 JJ |
5196 | else |
5197 | dr_type = R_X86_64_TPOFF64; | |
5198 | ||
6de2ae4a | 5199 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 5200 | outrel.r_addend = 0; |
67a4f2b7 AO |
5201 | if ((dr_type == R_X86_64_TPOFF64 |
5202 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
351f65ca L |
5203 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
5204 | outrel.r_info = htab->r_info (indx, dr_type); | |
bffbf940 | 5205 | |
351f65ca | 5206 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 5207 | |
67a4f2b7 | 5208 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
5209 | { |
5210 | if (indx == 0) | |
5211 | { | |
d40d037c | 5212 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 5213 | bfd_put_64 (output_bfd, |
351f65ca | 5214 | relocation - elf_x86_64_dtpoff_base (info), |
6de2ae4a | 5215 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
5216 | } |
5217 | else | |
5218 | { | |
5219 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5220 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5221 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
5222 | R_X86_64_DTPOFF64); |
5223 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 5224 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 5225 | &outrel); |
bffbf940 JJ |
5226 | } |
5227 | } | |
5228 | ||
67a4f2b7 | 5229 | dr_done: |
bffbf940 JJ |
5230 | if (h != NULL) |
5231 | h->got.offset |= 1; | |
5232 | else | |
5233 | local_got_offsets[r_symndx] |= 1; | |
5234 | } | |
5235 | ||
67a4f2b7 AO |
5236 | if (off >= (bfd_vma) -2 |
5237 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 5238 | abort (); |
351f65ca | 5239 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 5240 | { |
67a4f2b7 AO |
5241 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
5242 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
5243 | relocation = htab->elf.sgotplt->output_section->vma |
5244 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
5245 | + offplt + htab->sgotplt_jump_table_size; |
5246 | else | |
6de2ae4a L |
5247 | relocation = htab->elf.sgot->output_section->vma |
5248 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5249 | unresolved_reloc = FALSE; |
bffbf940 | 5250 | } |
142411ca | 5251 | else |
67a4f2b7 | 5252 | { |
142411ca | 5253 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 5254 | |
351f65ca | 5255 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 5256 | { |
52bc799a | 5257 | /* GD->IE transition. For 64bit, change |
142411ca L |
5258 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
5259 | .word 0x6666; rex64; call __tls_get_addr@plt | |
52bc799a | 5260 | into: |
142411ca | 5261 | movq %fs:0, %rax |
52bc799a L |
5262 | addq foo@gottpoff(%rip), %rax |
5263 | For 32bit, change | |
5264 | leaq foo@tlsgd(%rip), %rdi | |
5265 | .word 0x6666; rex64; call __tls_get_addr@plt | |
5266 | into: | |
5267 | movl %fs:0, %eax | |
5c98a14e JJ |
5268 | addq foo@gottpoff(%rip), %rax |
5269 | For largepic, change: | |
5270 | leaq foo@tlsgd(%rip), %rdi | |
5271 | movabsq $__tls_get_addr@pltoff, %rax | |
5272 | addq %rbx, %rax | |
5273 | call *%rax | |
5274 | into: | |
5275 | movq %fs:0, %rax | |
5276 | addq foo@gottpoff(%rax), %rax | |
5277 | nopw 0x0(%rax,%rax,1) */ | |
5278 | int largepic = 0; | |
5279 | if (ABI_64_P (output_bfd) | |
5280 | && contents[roff + 5] == (bfd_byte) '\xb8') | |
5281 | { | |
5282 | memcpy (contents + roff - 3, | |
5283 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
5284 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
5285 | largepic = 1; | |
5286 | } | |
5287 | else if (ABI_64_P (output_bfd)) | |
52bc799a L |
5288 | memcpy (contents + roff - 4, |
5289 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
5290 | 16); | |
5291 | else | |
5292 | memcpy (contents + roff - 3, | |
5293 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
5294 | 15); | |
142411ca | 5295 | |
6de2ae4a L |
5296 | relocation = (htab->elf.sgot->output_section->vma |
5297 | + htab->elf.sgot->output_offset + off | |
142411ca | 5298 | - roff |
5c98a14e | 5299 | - largepic |
142411ca L |
5300 | - input_section->output_section->vma |
5301 | - input_section->output_offset | |
5302 | - 12); | |
5303 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
5304 | contents + roff + 8 + largepic); |
5305 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 5306 | rel++; |
60f2e42e | 5307 | wrel++; |
142411ca L |
5308 | continue; |
5309 | } | |
351f65ca | 5310 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
5311 | { |
5312 | /* GDesc -> IE transition. | |
5313 | It's originally something like: | |
5314 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 5315 | |
142411ca | 5316 | Change it to: |
c9736ba0 | 5317 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 5318 | |
142411ca L |
5319 | /* Now modify the instruction as appropriate. To |
5320 | turn a leaq into a movq in the form we use it, it | |
5321 | suffices to change the second byte from 0x8d to | |
5322 | 0x8b. */ | |
5323 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
5324 | ||
5325 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
5326 | htab->elf.sgot->output_section->vma |
5327 | + htab->elf.sgot->output_offset + off | |
142411ca L |
5328 | - rel->r_offset |
5329 | - input_section->output_section->vma | |
5330 | - input_section->output_offset | |
5331 | - 4, | |
5332 | contents + roff); | |
5333 | continue; | |
5334 | } | |
351f65ca | 5335 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
5336 | { |
5337 | /* GDesc -> IE transition. | |
5338 | It's originally: | |
5339 | call *(%rax) | |
5340 | ||
5341 | Change it to: | |
c9736ba0 | 5342 | xchg %ax, %ax. */ |
142411ca | 5343 | |
142411ca L |
5344 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
5345 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
5346 | continue; | |
5347 | } | |
5348 | else | |
5349 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 5350 | } |
bffbf940 JJ |
5351 | break; |
5352 | ||
5353 | case R_X86_64_TLSLD: | |
351f65ca L |
5354 | if (! elf_x86_64_tls_transition (info, input_bfd, |
5355 | input_section, contents, | |
5356 | symtab_hdr, sym_hashes, | |
5357 | &r_type, GOT_UNKNOWN, | |
5358 | rel, relend, h, r_symndx)) | |
142411ca | 5359 | return FALSE; |
a3fadc9a | 5360 | |
142411ca L |
5361 | if (r_type != R_X86_64_TLSLD) |
5362 | { | |
bffbf940 | 5363 | /* LD->LE transition: |
a3fadc9a | 5364 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr. |
52bc799a L |
5365 | For 64bit, we change it into: |
5366 | .word 0x6666; .byte 0x66; movq %fs:0, %rax. | |
5367 | For 32bit, we change it into: | |
5c98a14e JJ |
5368 | nopl 0x0(%rax); movl %fs:0, %eax. |
5369 | For largepic, change: | |
5370 | leaq foo@tlsgd(%rip), %rdi | |
5371 | movabsq $__tls_get_addr@pltoff, %rax | |
5372 | addq %rbx, %rax | |
5373 | call *%rax | |
5374 | into: | |
5375 | data32 data32 data32 nopw %cs:0x0(%rax,%rax,1) | |
5376 | movq %fs:0, %eax */ | |
142411ca L |
5377 | |
5378 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
5c98a14e JJ |
5379 | if (ABI_64_P (output_bfd) |
5380 | && contents[rel->r_offset + 5] == (bfd_byte) '\xb8') | |
5381 | memcpy (contents + rel->r_offset - 3, | |
5382 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
5383 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
5384 | else if (ABI_64_P (output_bfd)) | |
52bc799a L |
5385 | memcpy (contents + rel->r_offset - 3, |
5386 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
5387 | else | |
5388 | memcpy (contents + rel->r_offset - 3, | |
5389 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
5c98a14e | 5390 | /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */ |
bffbf940 | 5391 | rel++; |
60f2e42e | 5392 | wrel++; |
bffbf940 JJ |
5393 | continue; |
5394 | } | |
5395 | ||
6de2ae4a | 5396 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
5397 | abort (); |
5398 | ||
5399 | off = htab->tls_ld_got.offset; | |
5400 | if (off & 1) | |
5401 | off &= ~1; | |
5402 | else | |
5403 | { | |
5404 | Elf_Internal_Rela outrel; | |
bffbf940 | 5405 | |
6de2ae4a | 5406 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
5407 | abort (); |
5408 | ||
6de2ae4a L |
5409 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5410 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
5411 | |
5412 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5413 | htab->elf.sgot->contents + off); |
bffbf940 | 5414 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 5415 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5416 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 5417 | outrel.r_addend = 0; |
351f65ca | 5418 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 5419 | &outrel); |
bffbf940 JJ |
5420 | htab->tls_ld_got.offset |= 1; |
5421 | } | |
6de2ae4a L |
5422 | relocation = htab->elf.sgot->output_section->vma |
5423 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5424 | unresolved_reloc = FALSE; |
bffbf940 JJ |
5425 | break; |
5426 | ||
5427 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
5428 | if (!bfd_link_executable (info) |
5429 | || (input_section->flags & SEC_CODE) == 0) | |
351f65ca | 5430 | relocation -= elf_x86_64_dtpoff_base (info); |
bffbf940 | 5431 | else |
351f65ca | 5432 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5433 | break; |
5434 | ||
5435 | case R_X86_64_TPOFF32: | |
6769d501 | 5436 | case R_X86_64_TPOFF64: |
0e1862bb | 5437 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 5438 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5439 | break; |
5440 | ||
a69ed7f7 L |
5441 | case R_X86_64_DTPOFF64: |
5442 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
5443 | relocation -= elf_x86_64_dtpoff_base (info); | |
5444 | break; | |
5445 | ||
70256ad8 AJ |
5446 | default: |
5447 | break; | |
5448 | } | |
8d88c4ca | 5449 | |
239e1f3a AM |
5450 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
5451 | because such sections are not SEC_ALLOC and thus ld.so will | |
5452 | not process them. */ | |
c434dee6 | 5453 | if (unresolved_reloc |
239e1f3a | 5454 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
5455 | && h->def_dynamic) |
5456 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
5457 | rel->r_offset) != (bfd_vma) -1) | |
a040981f L |
5458 | { |
5459 | (*_bfd_error_handler) | |
5460 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), | |
5461 | input_bfd, | |
5462 | input_section, | |
5463 | (long) rel->r_offset, | |
5464 | howto->name, | |
5465 | h->root.root.string); | |
5466 | return FALSE; | |
5467 | } | |
c434dee6 | 5468 | |
cbe950e9 | 5469 | do_relocation: |
8d88c4ca | 5470 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
5471 | contents, rel->r_offset, |
5472 | relocation, rel->r_addend); | |
8d88c4ca | 5473 | |
62d78908 | 5474 | check_relocation_error: |
8d88c4ca | 5475 | if (r != bfd_reloc_ok) |
8da6118f | 5476 | { |
c434dee6 AJ |
5477 | const char *name; |
5478 | ||
5479 | if (h != NULL) | |
5480 | name = h->root.root.string; | |
5481 | else | |
8da6118f | 5482 | { |
c434dee6 AJ |
5483 | name = bfd_elf_string_from_elf_section (input_bfd, |
5484 | symtab_hdr->sh_link, | |
5485 | sym->st_name); | |
5486 | if (name == NULL) | |
b34976b6 | 5487 | return FALSE; |
c434dee6 AJ |
5488 | if (*name == '\0') |
5489 | name = bfd_section_name (input_bfd, sec); | |
5490 | } | |
5491 | ||
5492 | if (r == bfd_reloc_overflow) | |
5493 | { | |
c434dee6 | 5494 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
5495 | (info, (h ? &h->root : NULL), name, howto->name, |
5496 | (bfd_vma) 0, input_bfd, input_section, | |
5497 | rel->r_offset))) | |
b34976b6 | 5498 | return FALSE; |
c434dee6 AJ |
5499 | } |
5500 | else | |
5501 | { | |
5502 | (*_bfd_error_handler) | |
bb95161d | 5503 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
d003868e | 5504 | input_bfd, input_section, |
c434dee6 | 5505 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 5506 | return FALSE; |
8da6118f KH |
5507 | } |
5508 | } | |
60f2e42e L |
5509 | |
5510 | if (wrel != rel) | |
5511 | *wrel = *rel; | |
5512 | } | |
5513 | ||
5514 | if (wrel != rel) | |
5515 | { | |
5516 | Elf_Internal_Shdr *rel_hdr; | |
5517 | size_t deleted = rel - wrel; | |
5518 | ||
5519 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
5520 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5521 | if (rel_hdr->sh_size == 0) | |
5522 | { | |
5523 | /* It is too late to remove an empty reloc section. Leave | |
5524 | one NONE reloc. | |
5525 | ??? What is wrong with an empty section??? */ | |
5526 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
5527 | deleted -= 1; | |
5528 | } | |
5529 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
5530 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5531 | input_section->reloc_count -= deleted; | |
8d88c4ca | 5532 | } |
70256ad8 | 5533 | |
b34976b6 | 5534 | return TRUE; |
70256ad8 AJ |
5535 | } |
5536 | ||
5537 | /* Finish up dynamic symbol handling. We set the contents of various | |
5538 | dynamic sections here. */ | |
5539 | ||
b34976b6 | 5540 | static bfd_boolean |
351f65ca L |
5541 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
5542 | struct bfd_link_info *info, | |
5543 | struct elf_link_hash_entry *h, | |
aec6b87e | 5544 | Elf_Internal_Sym *sym) |
70256ad8 | 5545 | { |
351f65ca | 5546 | struct elf_x86_64_link_hash_table *htab; |
0ff2b86e L |
5547 | const struct elf_x86_64_backend_data *abed; |
5548 | bfd_boolean use_plt_bnd; | |
dd7e64d4 | 5549 | struct elf_x86_64_link_hash_entry *eh; |
aec6b87e | 5550 | bfd_boolean local_undefweak; |
70256ad8 | 5551 | |
351f65ca | 5552 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
5553 | if (htab == NULL) |
5554 | return FALSE; | |
70256ad8 | 5555 | |
0ff2b86e L |
5556 | /* Use MPX backend data in case of BND relocation. Use .plt_bnd |
5557 | section only if there is .plt section. */ | |
5558 | use_plt_bnd = htab->elf.splt != NULL && htab->plt_bnd != NULL; | |
5559 | abed = (use_plt_bnd | |
5560 | ? &elf_x86_64_bnd_arch_bed | |
5561 | : get_elf_x86_64_backend_data (output_bfd)); | |
5562 | ||
dd7e64d4 L |
5563 | eh = (struct elf_x86_64_link_hash_entry *) h; |
5564 | ||
aec6b87e L |
5565 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
5566 | resolved undefined weak symbols in executable so that their | |
5567 | references have value 0 at run-time. */ | |
5568 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); | |
5569 | ||
70256ad8 AJ |
5570 | if (h->plt.offset != (bfd_vma) -1) |
5571 | { | |
70256ad8 | 5572 | bfd_vma plt_index; |
0ff2b86e L |
5573 | bfd_vma got_offset, plt_offset, plt_plt_offset, plt_got_offset; |
5574 | bfd_vma plt_plt_insn_end, plt_got_insn_size; | |
70256ad8 | 5575 | Elf_Internal_Rela rela; |
947216bf | 5576 | bfd_byte *loc; |
0ff2b86e | 5577 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 5578 | const struct elf_backend_data *bed; |
5974eba6 | 5579 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
5580 | |
5581 | /* When building a static executable, use .iplt, .igot.plt and | |
5582 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 5583 | if (htab->elf.splt != NULL) |
cbe950e9 | 5584 | { |
6de2ae4a L |
5585 | plt = htab->elf.splt; |
5586 | gotplt = htab->elf.sgotplt; | |
5587 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
5588 | } |
5589 | else | |
5590 | { | |
6de2ae4a L |
5591 | plt = htab->elf.iplt; |
5592 | gotplt = htab->elf.igotplt; | |
5593 | relplt = htab->elf.irelplt; | |
cbe950e9 | 5594 | } |
70256ad8 AJ |
5595 | |
5596 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 5597 | it up. */ |
cbe950e9 | 5598 | if ((h->dynindx == -1 |
aec6b87e | 5599 | && !local_undefweak |
0e1862bb | 5600 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
5601 | && h->def_regular |
5602 | && h->type == STT_GNU_IFUNC)) | |
5603 | || plt == NULL | |
5604 | || gotplt == NULL | |
5605 | || relplt == NULL) | |
cec7f46a | 5606 | abort (); |
70256ad8 AJ |
5607 | |
5608 | /* Get the index in the procedure linkage table which | |
5609 | corresponds to this symbol. This is the index of this symbol | |
5610 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 5611 | first entry in the procedure linkage table is reserved. |
6bbec505 | 5612 | |
cbe950e9 | 5613 | Get the offset into the .got table of the entry that |
407443a3 | 5614 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
5615 | bytes. The first three are reserved for the dynamic linker. |
5616 | ||
5617 | For static executables, we don't reserve anything. */ | |
5618 | ||
6de2ae4a | 5619 | if (plt == htab->elf.splt) |
cbe950e9 | 5620 | { |
eed180f8 | 5621 | got_offset = h->plt.offset / abed->plt_entry_size - 1; |
e1f98742 | 5622 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
5623 | } |
5624 | else | |
5625 | { | |
eed180f8 | 5626 | got_offset = h->plt.offset / abed->plt_entry_size; |
e1f98742 | 5627 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 5628 | } |
70256ad8 | 5629 | |
0ff2b86e L |
5630 | plt_plt_insn_end = abed->plt_plt_insn_end; |
5631 | plt_plt_offset = abed->plt_plt_offset; | |
5632 | plt_got_insn_size = abed->plt_got_insn_size; | |
5633 | plt_got_offset = abed->plt_got_offset; | |
5634 | if (use_plt_bnd) | |
5635 | { | |
5636 | /* Use the second PLT with BND relocations. */ | |
5637 | const bfd_byte *plt_entry, *plt2_entry; | |
0ff2b86e L |
5638 | |
5639 | if (eh->has_bnd_reloc) | |
5640 | { | |
5641 | plt_entry = elf_x86_64_bnd_plt_entry; | |
5642 | plt2_entry = elf_x86_64_bnd_plt2_entry; | |
5643 | } | |
5644 | else | |
5645 | { | |
5646 | plt_entry = elf_x86_64_legacy_plt_entry; | |
5647 | plt2_entry = elf_x86_64_legacy_plt2_entry; | |
5648 | ||
5649 | /* Subtract 1 since there is no BND prefix. */ | |
5650 | plt_plt_insn_end -= 1; | |
5651 | plt_plt_offset -= 1; | |
5652 | plt_got_insn_size -= 1; | |
5653 | plt_got_offset -= 1; | |
5654 | } | |
5655 | ||
5656 | BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry) | |
5657 | == sizeof (elf_x86_64_legacy_plt_entry)); | |
5658 | ||
5659 | /* Fill in the entry in the procedure linkage table. */ | |
5660 | memcpy (plt->contents + h->plt.offset, | |
5661 | plt_entry, sizeof (elf_x86_64_legacy_plt_entry)); | |
5662 | /* Fill in the entry in the second PLT. */ | |
5663 | memcpy (htab->plt_bnd->contents + eh->plt_bnd.offset, | |
5664 | plt2_entry, sizeof (elf_x86_64_legacy_plt2_entry)); | |
5665 | ||
5666 | resolved_plt = htab->plt_bnd; | |
5667 | plt_offset = eh->plt_bnd.offset; | |
5668 | } | |
5669 | else | |
5670 | { | |
5671 | /* Fill in the entry in the procedure linkage table. */ | |
5672 | memcpy (plt->contents + h->plt.offset, abed->plt_entry, | |
5673 | abed->plt_entry_size); | |
5674 | ||
5675 | resolved_plt = plt; | |
5676 | plt_offset = h->plt.offset; | |
5677 | } | |
eed180f8 RM |
5678 | |
5679 | /* Insert the relocation positions of the plt section. */ | |
5680 | ||
5681 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
5682 | subtracting the size of that instruction. */ | |
ab7fede8 L |
5683 | plt_got_pcrel_offset = (gotplt->output_section->vma |
5684 | + gotplt->output_offset | |
5685 | + got_offset | |
5686 | - resolved_plt->output_section->vma | |
5687 | - resolved_plt->output_offset | |
5688 | - plt_offset | |
5689 | - plt_got_insn_size); | |
5690 | ||
5691 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 5692 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
ab7fede8 L |
5693 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"), |
5694 | output_bfd, h->root.root.string); | |
5695 | ||
5696 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
0ff2b86e | 5697 | resolved_plt->contents + plt_offset + plt_got_offset); |
cbe950e9 | 5698 | |
653165cc | 5699 | /* Fill in the entry in the global offset table, initially this |
aec6b87e L |
5700 | points to the second part of the PLT entry. Leave the entry |
5701 | as zero for undefined weak symbol in PIE. No PLT relocation | |
5702 | against undefined weak symbol in PIE. */ | |
5703 | if (!local_undefweak) | |
cbe950e9 | 5704 | { |
aec6b87e L |
5705 | bfd_put_64 (output_bfd, (plt->output_section->vma |
5706 | + plt->output_offset | |
5707 | + h->plt.offset | |
5708 | + abed->plt_lazy_offset), | |
5709 | gotplt->contents + got_offset); | |
5710 | ||
5711 | /* Fill in the entry in the .rela.plt section. */ | |
5712 | rela.r_offset = (gotplt->output_section->vma | |
5713 | + gotplt->output_offset | |
5714 | + got_offset); | |
5715 | if (h->dynindx == -1 | |
5716 | || ((bfd_link_executable (info) | |
5717 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
5718 | && h->def_regular | |
5719 | && h->type == STT_GNU_IFUNC)) | |
5720 | { | |
5721 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
5722 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
5723 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); | |
5724 | rela.r_addend = (h->root.u.def.value | |
5725 | + h->root.u.def.section->output_section->vma | |
5726 | + h->root.u.def.section->output_offset); | |
5727 | /* R_X86_64_IRELATIVE comes last. */ | |
5728 | plt_index = htab->next_irelative_index--; | |
5729 | } | |
5730 | else | |
5731 | { | |
5732 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); | |
5733 | rela.r_addend = 0; | |
5734 | plt_index = htab->next_jump_slot_index++; | |
5735 | } | |
e1f98742 | 5736 | |
aec6b87e L |
5737 | /* Don't fill PLT entry for static executables. */ |
5738 | if (plt == htab->elf.splt) | |
5739 | { | |
5740 | bfd_vma plt0_offset = h->plt.offset + plt_plt_insn_end; | |
5741 | ||
5742 | /* Put relocation index. */ | |
5743 | bfd_put_32 (output_bfd, plt_index, | |
5744 | (plt->contents + h->plt.offset | |
5745 | + abed->plt_reloc_offset)); | |
5746 | ||
5747 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
5748 | check relocation index for overflow since branch displacement | |
5749 | will overflow first. */ | |
5750 | if (plt0_offset > 0x80000000) | |
5751 | info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"), | |
5752 | output_bfd, h->root.root.string); | |
5753 | bfd_put_32 (output_bfd, - plt0_offset, | |
5754 | plt->contents + h->plt.offset + plt_plt_offset); | |
5755 | } | |
351f65ca | 5756 | |
aec6b87e L |
5757 | bed = get_elf_backend_data (output_bfd); |
5758 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
5759 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
5760 | } | |
dd7e64d4 L |
5761 | } |
5762 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
5763 | { | |
5764 | bfd_vma got_offset, plt_offset, plt_got_offset, plt_got_insn_size; | |
5765 | asection *plt, *got; | |
5766 | bfd_boolean got_after_plt; | |
5767 | int32_t got_pcrel_offset; | |
5768 | const bfd_byte *got_plt_entry; | |
5769 | ||
5770 | /* Set the entry in the GOT procedure linkage table. */ | |
5771 | plt = htab->plt_got; | |
5772 | got = htab->elf.sgot; | |
5773 | got_offset = h->got.offset; | |
5774 | ||
5775 | if (got_offset == (bfd_vma) -1 | |
5776 | || h->type == STT_GNU_IFUNC | |
5777 | || plt == NULL | |
5778 | || got == NULL) | |
5779 | abort (); | |
70256ad8 | 5780 | |
dd7e64d4 L |
5781 | /* Use the second PLT entry template for the GOT PLT since they |
5782 | are the identical. */ | |
5783 | plt_got_insn_size = elf_x86_64_bnd_arch_bed.plt_got_insn_size; | |
5784 | plt_got_offset = elf_x86_64_bnd_arch_bed.plt_got_offset; | |
5785 | if (eh->has_bnd_reloc) | |
5786 | got_plt_entry = elf_x86_64_bnd_plt2_entry; | |
5787 | else | |
70256ad8 | 5788 | { |
dd7e64d4 L |
5789 | got_plt_entry = elf_x86_64_legacy_plt2_entry; |
5790 | ||
5791 | /* Subtract 1 since there is no BND prefix. */ | |
5792 | plt_got_insn_size -= 1; | |
5793 | plt_got_offset -= 1; | |
70256ad8 | 5794 | } |
dd7e64d4 L |
5795 | |
5796 | /* Fill in the entry in the GOT procedure linkage table. */ | |
5797 | plt_offset = eh->plt_got.offset; | |
5798 | memcpy (plt->contents + plt_offset, | |
5799 | got_plt_entry, sizeof (elf_x86_64_legacy_plt2_entry)); | |
5800 | ||
5801 | /* Put offset the PC-relative instruction referring to the GOT | |
5802 | entry, subtracting the size of that instruction. */ | |
5803 | got_pcrel_offset = (got->output_section->vma | |
5804 | + got->output_offset | |
5805 | + got_offset | |
5806 | - plt->output_section->vma | |
5807 | - plt->output_offset | |
5808 | - plt_offset | |
5809 | - plt_got_insn_size); | |
5810 | ||
5811 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
5812 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
5813 | if ((got_after_plt && got_pcrel_offset < 0) | |
5814 | || (!got_after_plt && got_pcrel_offset > 0)) | |
5815 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"), | |
5816 | output_bfd, h->root.root.string); | |
5817 | ||
5818 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
5819 | plt->contents + plt_offset + plt_got_offset); | |
5820 | } | |
5821 | ||
aec6b87e L |
5822 | if (!local_undefweak |
5823 | && !h->def_regular | |
dd7e64d4 L |
5824 | && (h->plt.offset != (bfd_vma) -1 |
5825 | || eh->plt_got.offset != (bfd_vma) -1)) | |
5826 | { | |
5827 | /* Mark the symbol as undefined, rather than as defined in | |
5828 | the .plt section. Leave the value if there were any | |
5829 | relocations where pointer equality matters (this is a clue | |
5830 | for the dynamic linker, to make function pointer | |
5831 | comparisons work between an application and shared | |
5832 | library), otherwise set it to zero. If a function is only | |
5833 | called from a binary, there is no need to slow down | |
5834 | shared libraries because of that. */ | |
5835 | sym->st_shndx = SHN_UNDEF; | |
5836 | if (!h->pointer_equality_needed) | |
5837 | sym->st_value = 0; | |
70256ad8 AJ |
5838 | } |
5839 | ||
aec6b87e L |
5840 | /* Don't generate dynamic GOT relocation against undefined weak |
5841 | symbol in executable. */ | |
bffbf940 | 5842 | if (h->got.offset != (bfd_vma) -1 |
351f65ca | 5843 | && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type) |
aec6b87e L |
5844 | && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE |
5845 | && !local_undefweak) | |
053579d7 | 5846 | { |
053579d7 AJ |
5847 | Elf_Internal_Rela rela; |
5848 | ||
5849 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 5850 | up. */ |
6de2ae4a | 5851 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 5852 | abort (); |
053579d7 | 5853 | |
6de2ae4a L |
5854 | rela.r_offset = (htab->elf.sgot->output_section->vma |
5855 | + htab->elf.sgot->output_offset | |
dc810e39 | 5856 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
5857 | |
5858 | /* If this is a static link, or it is a -Bsymbolic link and the | |
5859 | symbol is defined locally or was forced to be local because | |
5860 | of a version file, we just want to emit a RELATIVE reloc. | |
5861 | The entry in the global offset table will already have been | |
5862 | initialized in the relocate_section function. */ | |
710ab287 | 5863 | if (h->def_regular |
0018b0a3 L |
5864 | && h->type == STT_GNU_IFUNC) |
5865 | { | |
0e1862bb | 5866 | if (bfd_link_pic (info)) |
710ab287 L |
5867 | { |
5868 | /* Generate R_X86_64_GLOB_DAT. */ | |
5869 | goto do_glob_dat; | |
5870 | } | |
5871 | else | |
5872 | { | |
90d60710 L |
5873 | asection *plt; |
5874 | ||
710ab287 L |
5875 | if (!h->pointer_equality_needed) |
5876 | abort (); | |
5877 | ||
5878 | /* For non-shared object, we can't use .got.plt, which | |
5879 | contains the real function addres if we need pointer | |
5880 | equality. We load the GOT entry with the PLT entry. */ | |
90d60710 | 5881 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
5882 | bfd_put_64 (output_bfd, (plt->output_section->vma |
5883 | + plt->output_offset | |
5884 | + h->plt.offset), | |
6de2ae4a | 5885 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
5886 | return TRUE; |
5887 | } | |
0018b0a3 | 5888 | } |
0e1862bb | 5889 | else if (bfd_link_pic (info) |
0018b0a3 | 5890 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
053579d7 | 5891 | { |
41bed6dd L |
5892 | if (!h->def_regular) |
5893 | return FALSE; | |
cc78d0af | 5894 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 5895 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
5896 | rela.r_addend = (h->root.u.def.value |
5897 | + h->root.u.def.section->output_section->vma | |
5898 | + h->root.u.def.section->output_offset); | |
5899 | } | |
5900 | else | |
5901 | { | |
5902 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 5903 | do_glob_dat: |
c434dee6 | 5904 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 5905 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 5906 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
5907 | rela.r_addend = 0; |
5908 | } | |
5909 | ||
351f65ca | 5910 | elf_append_rela (output_bfd, htab->elf.srelgot, &rela); |
053579d7 AJ |
5911 | } |
5912 | ||
f5385ebf | 5913 | if (h->needs_copy) |
70256ad8 | 5914 | { |
70256ad8 AJ |
5915 | Elf_Internal_Rela rela; |
5916 | ||
5917 | /* This symbol needs a copy reloc. Set it up. */ | |
5918 | ||
c434dee6 AJ |
5919 | if (h->dynindx == -1 |
5920 | || (h->root.type != bfd_link_hash_defined | |
5921 | && h->root.type != bfd_link_hash_defweak) | |
5922 | || htab->srelbss == NULL) | |
5923 | abort (); | |
70256ad8 AJ |
5924 | |
5925 | rela.r_offset = (h->root.u.def.value | |
5926 | + h->root.u.def.section->output_section->vma | |
5927 | + h->root.u.def.section->output_offset); | |
351f65ca | 5928 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 5929 | rela.r_addend = 0; |
351f65ca | 5930 | elf_append_rela (output_bfd, htab->srelbss, &rela); |
70256ad8 AJ |
5931 | } |
5932 | ||
b34976b6 | 5933 | return TRUE; |
70256ad8 AJ |
5934 | } |
5935 | ||
c25bc9fc L |
5936 | /* Finish up local dynamic symbol handling. We set the contents of |
5937 | various dynamic sections here. */ | |
5938 | ||
5939 | static bfd_boolean | |
351f65ca | 5940 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
5941 | { |
5942 | struct elf_link_hash_entry *h | |
5943 | = (struct elf_link_hash_entry *) *slot; | |
5944 | struct bfd_link_info *info | |
eed180f8 | 5945 | = (struct bfd_link_info *) inf; |
c25bc9fc | 5946 | |
351f65ca | 5947 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
c25bc9fc L |
5948 | info, h, NULL); |
5949 | } | |
5950 | ||
aec6b87e L |
5951 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
5952 | here since undefined weak symbol may not be dynamic and may not be | |
5953 | called for elf_x86_64_finish_dynamic_symbol. */ | |
5954 | ||
5955 | static bfd_boolean | |
5956 | elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
5957 | void *inf) | |
5958 | { | |
5959 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
5960 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
5961 | ||
5962 | if (h->root.type != bfd_link_hash_undefweak | |
5963 | || h->dynindx != -1) | |
5964 | return TRUE; | |
5965 | ||
5966 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, | |
5967 | info, h, NULL); | |
5968 | } | |
5969 | ||
c434dee6 AJ |
5970 | /* Used to decide how to sort relocs in an optimal manner for the |
5971 | dynamic linker, before writing them out. */ | |
5972 | ||
5973 | static enum elf_reloc_type_class | |
cae1fbbb | 5974 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
5975 | const asection *rel_sec ATTRIBUTE_UNUSED, |
5976 | const Elf_Internal_Rela *rela) | |
c434dee6 | 5977 | { |
cae1fbbb L |
5978 | bfd *abfd = info->output_bfd; |
5979 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
5980 | struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info); | |
cae1fbbb | 5981 | |
d9e3b590 L |
5982 | if (htab->elf.dynsym != NULL |
5983 | && htab->elf.dynsym->contents != NULL) | |
5984 | { | |
5985 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
5986 | dynamic symbols. */ | |
5987 | unsigned long r_symndx = htab->r_sym (rela->r_info); | |
5988 | Elf_Internal_Sym sym; | |
5989 | if (!bed->s->swap_symbol_in (abfd, | |
5990 | (htab->elf.dynsym->contents | |
5991 | + r_symndx * bed->s->sizeof_sym), | |
5992 | 0, &sym)) | |
5993 | abort (); | |
5994 | ||
5995 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) | |
5996 | return reloc_class_ifunc; | |
5997 | } | |
cae1fbbb | 5998 | |
351f65ca | 5999 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 AJ |
6000 | { |
6001 | case R_X86_64_RELATIVE: | |
1da80baa | 6002 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
6003 | return reloc_class_relative; |
6004 | case R_X86_64_JUMP_SLOT: | |
6005 | return reloc_class_plt; | |
6006 | case R_X86_64_COPY: | |
6007 | return reloc_class_copy; | |
6008 | default: | |
6009 | return reloc_class_normal; | |
6010 | } | |
6011 | } | |
6012 | ||
70256ad8 AJ |
6013 | /* Finish up the dynamic sections. */ |
6014 | ||
b34976b6 | 6015 | static bfd_boolean |
351f65ca L |
6016 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
6017 | struct bfd_link_info *info) | |
70256ad8 | 6018 | { |
351f65ca | 6019 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
6020 | bfd *dynobj; |
6021 | asection *sdyn; | |
0ff2b86e | 6022 | const struct elf_x86_64_backend_data *abed; |
70256ad8 | 6023 | |
351f65ca | 6024 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
6025 | if (htab == NULL) |
6026 | return FALSE; | |
6027 | ||
0ff2b86e L |
6028 | /* Use MPX backend data in case of BND relocation. Use .plt_bnd |
6029 | section only if there is .plt section. */ | |
6030 | abed = (htab->elf.splt != NULL && htab->plt_bnd != NULL | |
6031 | ? &elf_x86_64_bnd_arch_bed | |
6032 | : get_elf_x86_64_backend_data (output_bfd)); | |
6033 | ||
c434dee6 | 6034 | dynobj = htab->elf.dynobj; |
3d4d4302 | 6035 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
70256ad8 | 6036 | |
c434dee6 | 6037 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 6038 | { |
82e96e07 L |
6039 | bfd_byte *dyncon, *dynconend; |
6040 | const struct elf_backend_data *bed; | |
6041 | bfd_size_type sizeof_dyn; | |
70256ad8 | 6042 | |
6de2ae4a | 6043 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 6044 | abort (); |
70256ad8 | 6045 | |
82e96e07 L |
6046 | bed = get_elf_backend_data (dynobj); |
6047 | sizeof_dyn = bed->s->sizeof_dyn; | |
6048 | dyncon = sdyn->contents; | |
6049 | dynconend = sdyn->contents + sdyn->size; | |
6050 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
6051 | { |
6052 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
6053 | asection *s; |
6054 | ||
82e96e07 | 6055 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
6056 | |
6057 | switch (dyn.d_tag) | |
6058 | { | |
6059 | default: | |
053579d7 | 6060 | continue; |
70256ad8 AJ |
6061 | |
6062 | case DT_PLTGOT: | |
6de2ae4a | 6063 | s = htab->elf.sgotplt; |
8c37241b | 6064 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 6065 | break; |
70256ad8 AJ |
6066 | |
6067 | case DT_JMPREL: | |
6de2ae4a | 6068 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 6069 | break; |
70256ad8 | 6070 | |
c434dee6 | 6071 | case DT_PLTRELSZ: |
6de2ae4a | 6072 | s = htab->elf.srelplt->output_section; |
eea6121a | 6073 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
6074 | break; |
6075 | ||
6076 | case DT_RELASZ: | |
c434dee6 AJ |
6077 | /* The procedure linkage table relocs (DT_JMPREL) should |
6078 | not be included in the overall relocs (DT_RELA). | |
6079 | Therefore, we override the DT_RELASZ entry here to | |
6080 | make it not include the JMPREL relocs. Since the | |
6081 | linker script arranges for .rela.plt to follow all | |
6082 | other relocation sections, we don't have to worry | |
6083 | about changing the DT_RELA entry. */ | |
6de2ae4a | 6084 | if (htab->elf.srelplt != NULL) |
70256ad8 | 6085 | { |
6de2ae4a | 6086 | s = htab->elf.srelplt->output_section; |
eea6121a | 6087 | dyn.d_un.d_val -= s->size; |
70256ad8 AJ |
6088 | } |
6089 | break; | |
67a4f2b7 AO |
6090 | |
6091 | case DT_TLSDESC_PLT: | |
6de2ae4a | 6092 | s = htab->elf.splt; |
67a4f2b7 AO |
6093 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
6094 | + htab->tlsdesc_plt; | |
6095 | break; | |
6096 | ||
6097 | case DT_TLSDESC_GOT: | |
6de2ae4a | 6098 | s = htab->elf.sgot; |
67a4f2b7 AO |
6099 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
6100 | + htab->tlsdesc_got; | |
6101 | break; | |
70256ad8 | 6102 | } |
c434dee6 | 6103 | |
82e96e07 | 6104 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
6105 | } |
6106 | ||
c434dee6 | 6107 | /* Fill in the special first entry in the procedure linkage table. */ |
6de2ae4a | 6108 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 6109 | { |
653165cc | 6110 | /* Fill in the first entry in the procedure linkage table. */ |
eed180f8 RM |
6111 | memcpy (htab->elf.splt->contents, |
6112 | abed->plt0_entry, abed->plt_entry_size); | |
653165cc AJ |
6113 | /* Add offset for pushq GOT+8(%rip), since the instruction |
6114 | uses 6 bytes subtract this value. */ | |
6115 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
6116 | (htab->elf.sgotplt->output_section->vma |
6117 | + htab->elf.sgotplt->output_offset | |
653165cc | 6118 | + 8 |
6de2ae4a L |
6119 | - htab->elf.splt->output_section->vma |
6120 | - htab->elf.splt->output_offset | |
653165cc | 6121 | - 6), |
eed180f8 RM |
6122 | htab->elf.splt->contents + abed->plt0_got1_offset); |
6123 | /* Add offset for the PC-relative instruction accessing GOT+16, | |
6124 | subtracting the offset to the end of that instruction. */ | |
653165cc | 6125 | bfd_put_32 (output_bfd, |
6de2ae4a L |
6126 | (htab->elf.sgotplt->output_section->vma |
6127 | + htab->elf.sgotplt->output_offset | |
653165cc | 6128 | + 16 |
6de2ae4a L |
6129 | - htab->elf.splt->output_section->vma |
6130 | - htab->elf.splt->output_offset | |
eed180f8 RM |
6131 | - abed->plt0_got2_insn_end), |
6132 | htab->elf.splt->contents + abed->plt0_got2_offset); | |
653165cc | 6133 | |
eed180f8 RM |
6134 | elf_section_data (htab->elf.splt->output_section) |
6135 | ->this_hdr.sh_entsize = abed->plt_entry_size; | |
67a4f2b7 AO |
6136 | |
6137 | if (htab->tlsdesc_plt) | |
6138 | { | |
6139 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6de2ae4a | 6140 | htab->elf.sgot->contents + htab->tlsdesc_got); |
67a4f2b7 | 6141 | |
6de2ae4a | 6142 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, |
eed180f8 | 6143 | abed->plt0_entry, abed->plt_entry_size); |
67a4f2b7 AO |
6144 | |
6145 | /* Add offset for pushq GOT+8(%rip), since the | |
6146 | instruction uses 6 bytes subtract this value. */ | |
6147 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
6148 | (htab->elf.sgotplt->output_section->vma |
6149 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 6150 | + 8 |
6de2ae4a L |
6151 | - htab->elf.splt->output_section->vma |
6152 | - htab->elf.splt->output_offset | |
67a4f2b7 AO |
6153 | - htab->tlsdesc_plt |
6154 | - 6), | |
eed180f8 RM |
6155 | htab->elf.splt->contents |
6156 | + htab->tlsdesc_plt + abed->plt0_got1_offset); | |
6157 | /* Add offset for the PC-relative instruction accessing GOT+TDG, | |
6158 | where TGD stands for htab->tlsdesc_got, subtracting the offset | |
6159 | to the end of that instruction. */ | |
67a4f2b7 | 6160 | bfd_put_32 (output_bfd, |
6de2ae4a L |
6161 | (htab->elf.sgot->output_section->vma |
6162 | + htab->elf.sgot->output_offset | |
67a4f2b7 | 6163 | + htab->tlsdesc_got |
6de2ae4a L |
6164 | - htab->elf.splt->output_section->vma |
6165 | - htab->elf.splt->output_offset | |
67a4f2b7 | 6166 | - htab->tlsdesc_plt |
eed180f8 RM |
6167 | - abed->plt0_got2_insn_end), |
6168 | htab->elf.splt->contents | |
6169 | + htab->tlsdesc_plt + abed->plt0_got2_offset); | |
67a4f2b7 | 6170 | } |
70256ad8 | 6171 | } |
70256ad8 AJ |
6172 | } |
6173 | ||
0ff2b86e L |
6174 | if (htab->plt_bnd != NULL) |
6175 | elf_section_data (htab->plt_bnd->output_section) | |
6176 | ->this_hdr.sh_entsize = sizeof (elf_x86_64_bnd_plt2_entry); | |
6177 | ||
6de2ae4a | 6178 | if (htab->elf.sgotplt) |
70256ad8 | 6179 | { |
56d4289c L |
6180 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
6181 | { | |
6182 | (*_bfd_error_handler) | |
6183 | (_("discarded output section: `%A'"), htab->elf.sgotplt); | |
6184 | return FALSE; | |
6185 | } | |
6186 | ||
c434dee6 | 6187 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 6188 | if (htab->elf.sgotplt->size > 0) |
c434dee6 AJ |
6189 | { |
6190 | /* Set the first entry in the global offset table to the address of | |
6191 | the dynamic section. */ | |
6192 | if (sdyn == NULL) | |
6de2ae4a | 6193 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); |
c434dee6 AJ |
6194 | else |
6195 | bfd_put_64 (output_bfd, | |
6196 | sdyn->output_section->vma + sdyn->output_offset, | |
6de2ae4a | 6197 | htab->elf.sgotplt->contents); |
c434dee6 | 6198 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
6de2ae4a L |
6199 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); |
6200 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
c434dee6 | 6201 | } |
70256ad8 | 6202 | |
6de2ae4a | 6203 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = |
c434dee6 AJ |
6204 | GOT_ENTRY_SIZE; |
6205 | } | |
70256ad8 | 6206 | |
e41b3a13 | 6207 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
6208 | if (htab->plt_eh_frame != NULL |
6209 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
6210 | { |
6211 | if (htab->elf.splt != NULL | |
6212 | && htab->elf.splt->size != 0 | |
6213 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
6214 | && htab->elf.splt->output_section != NULL | |
6215 | && htab->plt_eh_frame->output_section != NULL) | |
6216 | { | |
6217 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
6218 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
6219 | + htab->plt_eh_frame->output_offset | |
6220 | + PLT_FDE_START_OFFSET; | |
6221 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
6222 | htab->plt_eh_frame->contents | |
6223 | + PLT_FDE_START_OFFSET); | |
6224 | } | |
dbaa2011 | 6225 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
6226 | { |
6227 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
6228 | htab->plt_eh_frame, | |
6229 | htab->plt_eh_frame->contents)) | |
6230 | return FALSE; | |
6231 | } | |
6232 | } | |
6233 | ||
6de2ae4a L |
6234 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
6235 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
6236 | = GOT_ENTRY_SIZE; |
6237 | ||
c25bc9fc L |
6238 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
6239 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 6240 | elf_x86_64_finish_local_dynamic_symbol, |
c25bc9fc L |
6241 | info); |
6242 | ||
aec6b87e L |
6243 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
6244 | if (bfd_link_pie (info)) | |
6245 | bfd_hash_traverse (&info->hash->table, | |
6246 | elf_x86_64_pie_finish_undefweak_symbol, | |
6247 | info); | |
6248 | ||
b34976b6 | 6249 | return TRUE; |
8d88c4ca NC |
6250 | } |
6251 | ||
3972882e | 6252 | /* Return an array of PLT entry symbol values. */ |
4c45e5c9 | 6253 | |
3972882e L |
6254 | static bfd_vma * |
6255 | elf_x86_64_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt, | |
6256 | asection *relplt) | |
4c45e5c9 | 6257 | { |
3972882e L |
6258 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
6259 | arelent *p; | |
6260 | long count, i; | |
6261 | bfd_vma *plt_sym_val; | |
144bed8d | 6262 | bfd_vma plt_offset; |
3972882e L |
6263 | bfd_byte *plt_contents; |
6264 | const struct elf_x86_64_backend_data *bed; | |
6265 | Elf_Internal_Shdr *hdr; | |
6266 | asection *plt_bnd; | |
144bed8d | 6267 | |
3972882e L |
6268 | /* Get the .plt section contents. PLT passed down may point to the |
6269 | .plt.bnd section. Make sure that PLT always points to the .plt | |
6270 | section. */ | |
6271 | plt_bnd = bfd_get_section_by_name (abfd, ".plt.bnd"); | |
6272 | if (plt_bnd) | |
6273 | { | |
6274 | if (plt != plt_bnd) | |
6275 | abort (); | |
6276 | plt = bfd_get_section_by_name (abfd, ".plt"); | |
6277 | if (plt == NULL) | |
6278 | abort (); | |
6279 | bed = &elf_x86_64_bnd_arch_bed; | |
6280 | } | |
6281 | else | |
6282 | bed = get_elf_x86_64_backend_data (abfd); | |
cca5b8b6 | 6283 | |
3972882e L |
6284 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); |
6285 | if (plt_contents == NULL) | |
6286 | return NULL; | |
6287 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
6288 | plt_contents, 0, plt->size)) | |
144bed8d | 6289 | { |
3972882e L |
6290 | bad_return: |
6291 | free (plt_contents); | |
6292 | return NULL; | |
144bed8d L |
6293 | } |
6294 | ||
3972882e L |
6295 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
6296 | if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) | |
6297 | goto bad_return; | |
144bed8d | 6298 | |
3972882e L |
6299 | hdr = &elf_section_data (relplt)->this_hdr; |
6300 | count = relplt->size / hdr->sh_entsize; | |
144bed8d | 6301 | |
3972882e L |
6302 | plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count); |
6303 | if (plt_sym_val == NULL) | |
6304 | goto bad_return; | |
cca5b8b6 | 6305 | |
35181b3e | 6306 | for (i = 0; i < count; i++) |
3972882e | 6307 | plt_sym_val[i] = -1; |
cca5b8b6 | 6308 | |
3972882e L |
6309 | plt_offset = bed->plt_entry_size; |
6310 | p = relplt->relocation; | |
6311 | for (i = 0; i < count; i++, p++) | |
144bed8d | 6312 | { |
3972882e | 6313 | long reloc_index; |
144bed8d | 6314 | |
6f25f223 | 6315 | /* Skip unknown relocation. */ |
533d0af0 | 6316 | if (p->howto == NULL) |
6f25f223 | 6317 | continue; |
533d0af0 | 6318 | |
3972882e L |
6319 | if (p->howto->type != R_X86_64_JUMP_SLOT |
6320 | && p->howto->type != R_X86_64_IRELATIVE) | |
6321 | continue; | |
144bed8d | 6322 | |
3972882e L |
6323 | reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset |
6324 | + bed->plt_reloc_offset)); | |
ec1f73bb | 6325 | if (reloc_index < count) |
144bed8d | 6326 | { |
ec1f73bb AM |
6327 | if (plt_bnd) |
6328 | { | |
6329 | /* This is the index in .plt section. */ | |
6330 | long plt_index = plt_offset / bed->plt_entry_size; | |
6331 | /* Store VMA + the offset in .plt.bnd section. */ | |
6332 | plt_sym_val[reloc_index] = | |
6333 | (plt_bnd->vma | |
6334 | + (plt_index - 1) * sizeof (elf_x86_64_legacy_plt2_entry)); | |
6335 | } | |
6336 | else | |
6337 | plt_sym_val[reloc_index] = plt->vma + plt_offset; | |
144bed8d L |
6338 | } |
6339 | plt_offset += bed->plt_entry_size; | |
fca6ae69 L |
6340 | |
6341 | /* PR binutils/18437: Skip extra relocations in the .rela.plt | |
6342 | section. */ | |
6343 | if (plt_offset >= plt->size) | |
6344 | break; | |
144bed8d L |
6345 | } |
6346 | ||
3972882e L |
6347 | free (plt_contents); |
6348 | ||
6349 | return plt_sym_val; | |
4c45e5c9 | 6350 | } |
8df9fc9d | 6351 | |
0ff2b86e L |
6352 | /* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section |
6353 | support. */ | |
6354 | ||
6355 | static long | |
6356 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
6357 | long symcount, | |
6358 | asymbol **syms, | |
6359 | long dynsymcount, | |
6360 | asymbol **dynsyms, | |
6361 | asymbol **ret) | |
6362 | { | |
3972882e L |
6363 | /* Pass the .plt.bnd section to _bfd_elf_ifunc_get_synthetic_symtab |
6364 | as PLT if it exists. */ | |
6365 | asection *plt = bfd_get_section_by_name (abfd, ".plt.bnd"); | |
0ff2b86e | 6366 | if (plt == NULL) |
3972882e L |
6367 | plt = bfd_get_section_by_name (abfd, ".plt"); |
6368 | return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms, | |
6369 | dynsymcount, dynsyms, ret, | |
6370 | plt, | |
6371 | elf_x86_64_get_plt_sym_val); | |
0ff2b86e L |
6372 | } |
6373 | ||
d2b2c203 DJ |
6374 | /* Handle an x86-64 specific section when reading an object file. This |
6375 | is called when elfcode.h finds a section with an unknown type. */ | |
6376 | ||
6377 | static bfd_boolean | |
0c723101 L |
6378 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
6379 | const char *name, int shindex) | |
d2b2c203 DJ |
6380 | { |
6381 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
6382 | return FALSE; | |
6383 | ||
6dc132d9 | 6384 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
6385 | return FALSE; |
6386 | ||
6387 | return TRUE; | |
6388 | } | |
6389 | ||
3b22753a L |
6390 | /* Hook called by the linker routine which adds symbols from an object |
6391 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
6392 | of .bss. */ | |
6393 | ||
6394 | static bfd_boolean | |
351f65ca L |
6395 | elf_x86_64_add_symbol_hook (bfd *abfd, |
6396 | struct bfd_link_info *info, | |
6397 | Elf_Internal_Sym *sym, | |
6398 | const char **namep ATTRIBUTE_UNUSED, | |
6399 | flagword *flagsp ATTRIBUTE_UNUSED, | |
6400 | asection **secp, | |
6401 | bfd_vma *valp) | |
3b22753a L |
6402 | { |
6403 | asection *lcomm; | |
6404 | ||
6405 | switch (sym->st_shndx) | |
6406 | { | |
6407 | case SHN_X86_64_LCOMMON: | |
6408 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
6409 | if (lcomm == NULL) | |
6410 | { | |
6411 | lcomm = bfd_make_section_with_flags (abfd, | |
6412 | "LARGE_COMMON", | |
6413 | (SEC_ALLOC | |
6414 | | SEC_IS_COMMON | |
6415 | | SEC_LINKER_CREATED)); | |
6416 | if (lcomm == NULL) | |
6417 | return FALSE; | |
6418 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
6419 | } | |
6420 | *secp = lcomm; | |
6421 | *valp = sym->st_size; | |
c35bdf6e | 6422 | return TRUE; |
3b22753a | 6423 | } |
d8045f23 | 6424 | |
13a2df29 | 6425 | if (ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE |
f1885d1e AM |
6426 | && (abfd->flags & DYNAMIC) == 0 |
6427 | && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) | |
13a2df29 L |
6428 | elf_tdata (info->output_bfd)->has_gnu_symbols |
6429 | |= elf_gnu_symbol_unique; | |
d8045f23 | 6430 | |
3b22753a L |
6431 | return TRUE; |
6432 | } | |
6433 | ||
6434 | ||
6435 | /* Given a BFD section, try to locate the corresponding ELF section | |
6436 | index. */ | |
6437 | ||
6438 | static bfd_boolean | |
351f65ca L |
6439 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
6440 | asection *sec, int *index_return) | |
3b22753a L |
6441 | { |
6442 | if (sec == &_bfd_elf_large_com_section) | |
6443 | { | |
91d6fa6a | 6444 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
6445 | return TRUE; |
6446 | } | |
6447 | return FALSE; | |
6448 | } | |
6449 | ||
6450 | /* Process a symbol. */ | |
6451 | ||
6452 | static void | |
351f65ca L |
6453 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
6454 | asymbol *asym) | |
3b22753a L |
6455 | { |
6456 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
6457 | ||
6458 | switch (elfsym->internal_elf_sym.st_shndx) | |
6459 | { | |
6460 | case SHN_X86_64_LCOMMON: | |
6461 | asym->section = &_bfd_elf_large_com_section; | |
6462 | asym->value = elfsym->internal_elf_sym.st_size; | |
6463 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
6464 | asym->flags &= ~BSF_GLOBAL; | |
6465 | break; | |
6466 | } | |
6467 | } | |
6468 | ||
6469 | static bfd_boolean | |
351f65ca | 6470 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
6471 | { |
6472 | return (sym->st_shndx == SHN_COMMON | |
6473 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
6474 | } | |
6475 | ||
6476 | static unsigned int | |
351f65ca | 6477 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
6478 | { |
6479 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
6480 | return SHN_COMMON; | |
6481 | else | |
6482 | return SHN_X86_64_LCOMMON; | |
6483 | } | |
6484 | ||
6485 | static asection * | |
351f65ca | 6486 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
6487 | { |
6488 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
6489 | return bfd_com_section_ptr; | |
6490 | else | |
6491 | return &_bfd_elf_large_com_section; | |
6492 | } | |
6493 | ||
6494 | static bfd_boolean | |
5d13b3b3 AM |
6495 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
6496 | const Elf_Internal_Sym *sym, | |
351f65ca | 6497 | asection **psec, |
5d13b3b3 AM |
6498 | bfd_boolean newdef, |
6499 | bfd_boolean olddef, | |
351f65ca | 6500 | bfd *oldbfd, |
5d13b3b3 | 6501 | const asection *oldsec) |
3b22753a L |
6502 | { |
6503 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
6504 | normal common symbol. We turn the large common symbol into a |
6505 | normal one. */ | |
5d13b3b3 | 6506 | if (!olddef |
3b22753a | 6507 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
6508 | && !newdef |
6509 | && bfd_is_com_section (*psec) | |
6510 | && oldsec != *psec) | |
3b22753a | 6511 | { |
00492999 | 6512 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 6513 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
6514 | { |
6515 | h->root.u.c.p->section | |
6516 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
6517 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
6518 | } | |
6519 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
6520 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
6521 | *psec = bfd_com_section_ptr; | |
3b22753a L |
6522 | } |
6523 | ||
6524 | return TRUE; | |
6525 | } | |
6526 | ||
6527 | static int | |
351f65ca L |
6528 | elf_x86_64_additional_program_headers (bfd *abfd, |
6529 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
6530 | { |
6531 | asection *s; | |
9a2e389a | 6532 | int count = 0; |
3b22753a L |
6533 | |
6534 | /* Check to see if we need a large readonly segment. */ | |
6535 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
6536 | if (s && (s->flags & SEC_LOAD)) | |
6537 | count++; | |
6538 | ||
6539 | /* Check to see if we need a large data segment. Since .lbss sections | |
6540 | is placed right after the .bss section, there should be no need for | |
6541 | a large data segment just because of .lbss. */ | |
6542 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
6543 | if (s && (s->flags & SEC_LOAD)) | |
6544 | count++; | |
6545 | ||
6546 | return count; | |
6547 | } | |
6548 | ||
fdc90cb4 JJ |
6549 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
6550 | ||
6551 | static bfd_boolean | |
351f65ca | 6552 | elf_x86_64_hash_symbol (struct elf_link_hash_entry *h) |
fdc90cb4 JJ |
6553 | { |
6554 | if (h->plt.offset != (bfd_vma) -1 | |
6555 | && !h->def_regular | |
6556 | && !h->pointer_equality_needed) | |
6557 | return FALSE; | |
6558 | ||
6559 | return _bfd_elf_hash_symbol (h); | |
6560 | } | |
6561 | ||
c543bf9a L |
6562 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
6563 | ||
6564 | static bfd_boolean | |
6565 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
6566 | const bfd_target *output) | |
6567 | { | |
6568 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
6569 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
6570 | && _bfd_elf_relocs_compatible (input, output)); | |
6571 | } | |
6572 | ||
9a2e389a | 6573 | static const struct bfd_elf_special_section |
351f65ca | 6574 | elf_x86_64_special_sections[]= |
3b22753a | 6575 | { |
0112cd26 NC |
6576 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
6577 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
6578 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
6579 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
6580 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
6581 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
6582 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
6583 | }; |
6584 | ||
6d00b590 | 6585 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
6586 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
6587 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 6588 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 6589 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 6590 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 6591 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 6592 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
6593 | |
6594 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 6595 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
6596 | #define elf_backend_want_got_plt 1 |
6597 | #define elf_backend_plt_readonly 1 | |
6598 | #define elf_backend_want_plt_sym 0 | |
6599 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 6600 | #define elf_backend_rela_normal 1 |
e41b3a13 | 6601 | #define elf_backend_plt_alignment 4 |
f7483970 | 6602 | #define elf_backend_extern_protected_data 1 |
70256ad8 | 6603 | |
351f65ca | 6604 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 6605 | |
70256ad8 | 6606 | #define bfd_elf64_bfd_link_hash_table_create \ |
351f65ca | 6607 | elf_x86_64_link_hash_table_create |
351f65ca | 6608 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 6609 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 6610 | elf_x86_64_reloc_name_lookup |
70256ad8 | 6611 | |
351f65ca | 6612 | #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol |
c543bf9a | 6613 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca L |
6614 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
6615 | #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol | |
6616 | #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections | |
6617 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections | |
6618 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
6619 | #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook | |
6620 | #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook | |
6621 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus | |
6622 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
6623 | #ifdef CORE_HEADER |
6624 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
6625 | #endif | |
351f65ca L |
6626 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
6627 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
6628 | #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections | |
6629 | #define elf_backend_always_size_sections elf_x86_64_always_size_sections | |
74541ad4 | 6630 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 6631 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
351f65ca | 6632 | #define bfd_elf64_mkobject elf_x86_64_mkobject |
0ff2b86e | 6633 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 6634 | |
d2b2c203 | 6635 | #define elf_backend_section_from_shdr \ |
351f65ca | 6636 | elf_x86_64_section_from_shdr |
d2b2c203 | 6637 | |
3b22753a | 6638 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 6639 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 6640 | #define elf_backend_add_symbol_hook \ |
351f65ca | 6641 | elf_x86_64_add_symbol_hook |
3b22753a | 6642 | #define elf_backend_symbol_processing \ |
351f65ca | 6643 | elf_x86_64_symbol_processing |
3b22753a | 6644 | #define elf_backend_common_section_index \ |
351f65ca | 6645 | elf_x86_64_common_section_index |
3b22753a | 6646 | #define elf_backend_common_section \ |
351f65ca | 6647 | elf_x86_64_common_section |
3b22753a | 6648 | #define elf_backend_common_definition \ |
351f65ca | 6649 | elf_x86_64_common_definition |
3b22753a | 6650 | #define elf_backend_merge_symbol \ |
351f65ca | 6651 | elf_x86_64_merge_symbol |
3b22753a | 6652 | #define elf_backend_special_sections \ |
351f65ca | 6653 | elf_x86_64_special_sections |
3b22753a | 6654 | #define elf_backend_additional_program_headers \ |
351f65ca | 6655 | elf_x86_64_additional_program_headers |
fdc90cb4 | 6656 | #define elf_backend_hash_symbol \ |
351f65ca | 6657 | elf_x86_64_hash_symbol |
8f79b794 L |
6658 | #define elf_backend_omit_section_dynsym \ |
6659 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
aec6b87e L |
6660 | #define elf_backend_fixup_symbol \ |
6661 | elf_x86_64_fixup_symbol | |
3b22753a | 6662 | |
8d88c4ca | 6663 | #include "elf64-target.h" |
9d7cbccd | 6664 | |
6036f486 ES |
6665 | /* CloudABI support. */ |
6666 | ||
6667 | #undef TARGET_LITTLE_SYM | |
6668 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec | |
6669 | #undef TARGET_LITTLE_NAME | |
6670 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" | |
6671 | ||
6672 | #undef ELF_OSABI | |
6673 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
6674 | ||
6675 | #undef elf64_bed | |
6676 | #define elf64_bed elf64_x86_64_cloudabi_bed | |
6677 | ||
6678 | #include "elf64-target.h" | |
6679 | ||
9d7cbccd NC |
6680 | /* FreeBSD support. */ |
6681 | ||
6682 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6683 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
9d7cbccd NC |
6684 | #undef TARGET_LITTLE_NAME |
6685 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
6686 | ||
d1036acb L |
6687 | #undef ELF_OSABI |
6688 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 6689 | |
9d7cbccd NC |
6690 | #undef elf64_bed |
6691 | #define elf64_bed elf64_x86_64_fbsd_bed | |
6692 | ||
6693 | #include "elf64-target.h" | |
8a9036a4 | 6694 | |
a6cc6b3b RO |
6695 | /* Solaris 2 support. */ |
6696 | ||
6697 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6698 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
6699 | #undef TARGET_LITTLE_NAME |
6700 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
6701 | ||
6702 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
6703 | objects won't be recognized. */ | |
6704 | #undef ELF_OSABI | |
6705 | ||
6706 | #undef elf64_bed | |
6707 | #define elf64_bed elf64_x86_64_sol2_bed | |
6708 | ||
7dc98aea RO |
6709 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
6710 | boundary. */ | |
6711 | #undef elf_backend_static_tls_alignment | |
6712 | #define elf_backend_static_tls_alignment 16 | |
6713 | ||
a6cc6b3b RO |
6714 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
6715 | ||
6716 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
6717 | File, p.63. */ | |
6718 | #undef elf_backend_want_plt_sym | |
6719 | #define elf_backend_want_plt_sym 1 | |
6720 | ||
6721 | #include "elf64-target.h" | |
6722 | ||
8059fb19 RM |
6723 | /* Native Client support. */ |
6724 | ||
64b384e1 RM |
6725 | static bfd_boolean |
6726 | elf64_x86_64_nacl_elf_object_p (bfd *abfd) | |
6727 | { | |
6728 | /* Set the right machine number for a NaCl x86-64 ELF64 file. */ | |
6729 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl); | |
6730 | return TRUE; | |
6731 | } | |
6732 | ||
8059fb19 | 6733 | #undef TARGET_LITTLE_SYM |
6d00b590 | 6734 | #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec |
8059fb19 RM |
6735 | #undef TARGET_LITTLE_NAME |
6736 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
6737 | #undef elf64_bed | |
6738 | #define elf64_bed elf64_x86_64_nacl_bed | |
6739 | ||
6740 | #undef ELF_MAXPAGESIZE | |
6741 | #undef ELF_MINPAGESIZE | |
6742 | #undef ELF_COMMONPAGESIZE | |
6743 | #define ELF_MAXPAGESIZE 0x10000 | |
6744 | #define ELF_MINPAGESIZE 0x10000 | |
6745 | #define ELF_COMMONPAGESIZE 0x10000 | |
6746 | ||
6747 | /* Restore defaults. */ | |
6748 | #undef ELF_OSABI | |
6749 | #undef elf_backend_static_tls_alignment | |
6750 | #undef elf_backend_want_plt_sym | |
6751 | #define elf_backend_want_plt_sym 0 | |
6752 | ||
6753 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
6754 | ||
6755 | #undef elf_backend_plt_alignment | |
6756 | #define elf_backend_plt_alignment 5 | |
6757 | #define NACL_PLT_ENTRY_SIZE 64 | |
6758 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
6759 | ||
6760 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
6761 | { | |
6762 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
6763 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ | |
6764 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
6765 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
6766 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
6767 | ||
ea2d813e | 6768 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
70cc877f | 6769 | 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */ |
ea2d813e RM |
6770 | |
6771 | /* 32 bytes of nop to pad out to the standard size. */ | |
8059fb19 RM |
6772 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ |
6773 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
6774 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
6775 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
ea2d813e RM |
6776 | 0x66, /* excess data32 prefix */ |
6777 | 0x90 /* nop */ | |
8059fb19 RM |
6778 | }; |
6779 | ||
6780 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6781 | { | |
6782 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
6783 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
6784 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
6785 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
6786 | ||
6787 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
6788 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
6789 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
6790 | ||
6791 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6792 | 0x68, /* pushq immediate */ | |
6793 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
6794 | 0xe9, /* jmp relative */ | |
6795 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
6796 | ||
6797 | /* 22 bytes of nop to pad out to the standard size. */ | |
6798 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
6799 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
6800 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ | |
6801 | }; | |
6802 | ||
6803 | /* .eh_frame covering the .plt section. */ | |
6804 | ||
6805 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
6806 | { | |
6807 | #if (PLT_CIE_LENGTH != 20 \ | |
6808 | || PLT_FDE_LENGTH != 36 \ | |
6809 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
6810 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
6811 | # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!" | |
6812 | #endif | |
6813 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
6814 | 0, 0, 0, 0, /* CIE ID */ | |
6815 | 1, /* CIE version */ | |
6816 | 'z', 'R', 0, /* Augmentation string */ | |
6817 | 1, /* Code alignment factor */ | |
6818 | 0x78, /* Data alignment factor */ | |
6819 | 16, /* Return address column */ | |
6820 | 1, /* Augmentation size */ | |
6821 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
6822 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
6823 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
6824 | DW_CFA_nop, DW_CFA_nop, | |
6825 | ||
6826 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
6827 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
6828 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
6829 | 0, 0, 0, 0, /* .plt size goes here */ | |
6830 | 0, /* Augmentation size */ | |
6831 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
6832 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
6833 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
6834 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
6835 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
6836 | 13, /* Block length */ | |
6837 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
6838 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
6839 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
6840 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
6841 | DW_CFA_nop, DW_CFA_nop | |
6842 | }; | |
6843 | ||
6844 | static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed = | |
6845 | { | |
6846 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ | |
6847 | elf_x86_64_nacl_plt_entry, /* plt_entry */ | |
6848 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
6849 | 2, /* plt0_got1_offset */ | |
6850 | 9, /* plt0_got2_offset */ | |
6851 | 13, /* plt0_got2_insn_end */ | |
6852 | 3, /* plt_got_offset */ | |
6853 | 33, /* plt_reloc_offset */ | |
6854 | 38, /* plt_plt_offset */ | |
6855 | 7, /* plt_got_insn_size */ | |
6856 | 42, /* plt_plt_insn_end */ | |
6857 | 32, /* plt_lazy_offset */ | |
6858 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ | |
6859 | sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */ | |
6860 | }; | |
6861 | ||
6862 | #undef elf_backend_arch_data | |
6863 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
6864 | ||
64b384e1 RM |
6865 | #undef elf_backend_object_p |
6866 | #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p | |
5a68afcf RM |
6867 | #undef elf_backend_modify_segment_map |
6868 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
6869 | #undef elf_backend_modify_program_headers | |
6870 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
6871 | #undef elf_backend_final_write_processing |
6872 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 6873 | |
8059fb19 RM |
6874 | #include "elf64-target.h" |
6875 | ||
6876 | /* Native Client x32 support. */ | |
6877 | ||
64b384e1 RM |
6878 | static bfd_boolean |
6879 | elf32_x86_64_nacl_elf_object_p (bfd *abfd) | |
6880 | { | |
6881 | /* Set the right machine number for a NaCl x86-64 ELF32 file. */ | |
6882 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl); | |
6883 | return TRUE; | |
6884 | } | |
6885 | ||
8059fb19 | 6886 | #undef TARGET_LITTLE_SYM |
6d00b590 | 6887 | #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec |
8059fb19 RM |
6888 | #undef TARGET_LITTLE_NAME |
6889 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" | |
6890 | #undef elf32_bed | |
6891 | #define elf32_bed elf32_x86_64_nacl_bed | |
6892 | ||
6893 | #define bfd_elf32_bfd_link_hash_table_create \ | |
6894 | elf_x86_64_link_hash_table_create | |
8059fb19 RM |
6895 | #define bfd_elf32_bfd_reloc_type_lookup \ |
6896 | elf_x86_64_reloc_type_lookup | |
6897 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
6898 | elf_x86_64_reloc_name_lookup | |
6899 | #define bfd_elf32_mkobject \ | |
6900 | elf_x86_64_mkobject | |
b7365e5d L |
6901 | #define bfd_elf32_get_synthetic_symtab \ |
6902 | elf_x86_64_get_synthetic_symtab | |
8059fb19 RM |
6903 | |
6904 | #undef elf_backend_object_p | |
6905 | #define elf_backend_object_p \ | |
64b384e1 | 6906 | elf32_x86_64_nacl_elf_object_p |
8059fb19 RM |
6907 | |
6908 | #undef elf_backend_bfd_from_remote_memory | |
6909 | #define elf_backend_bfd_from_remote_memory \ | |
6910 | _bfd_elf32_bfd_from_remote_memory | |
6911 | ||
6912 | #undef elf_backend_size_info | |
6913 | #define elf_backend_size_info \ | |
6914 | _bfd_elf32_size_info | |
6915 | ||
6916 | #include "elf32-target.h" | |
6917 | ||
6918 | /* Restore defaults. */ | |
5a68afcf | 6919 | #undef elf_backend_object_p |
8059fb19 | 6920 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
6921 | #undef elf_backend_bfd_from_remote_memory |
6922 | #undef elf_backend_size_info | |
6923 | #undef elf_backend_modify_segment_map | |
6924 | #undef elf_backend_modify_program_headers | |
887badb3 | 6925 | #undef elf_backend_final_write_processing |
8059fb19 | 6926 | |
8a9036a4 L |
6927 | /* Intel L1OM support. */ |
6928 | ||
6929 | static bfd_boolean | |
6930 | elf64_l1om_elf_object_p (bfd *abfd) | |
6931 | { | |
6932 | /* Set the right machine number for an L1OM elf64 file. */ | |
6933 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
6934 | return TRUE; | |
6935 | } | |
6936 | ||
6937 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6938 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
6939 | #undef TARGET_LITTLE_NAME |
6940 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
6941 | #undef ELF_ARCH | |
6942 | #define ELF_ARCH bfd_arch_l1om | |
6943 | ||
6944 | #undef ELF_MACHINE_CODE | |
6945 | #define ELF_MACHINE_CODE EM_L1OM | |
6946 | ||
6947 | #undef ELF_OSABI | |
6948 | ||
6949 | #undef elf64_bed | |
6950 | #define elf64_bed elf64_l1om_bed | |
6951 | ||
6952 | #undef elf_backend_object_p | |
6953 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
6954 | ||
8059fb19 RM |
6955 | /* Restore defaults. */ |
6956 | #undef ELF_MAXPAGESIZE | |
6957 | #undef ELF_MINPAGESIZE | |
6958 | #undef ELF_COMMONPAGESIZE | |
6959 | #define ELF_MAXPAGESIZE 0x200000 | |
6960 | #define ELF_MINPAGESIZE 0x1000 | |
6961 | #define ELF_COMMONPAGESIZE 0x1000 | |
6962 | #undef elf_backend_plt_alignment | |
6963 | #define elf_backend_plt_alignment 4 | |
6964 | #undef elf_backend_arch_data | |
6965 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 6966 | |
8a9036a4 L |
6967 | #include "elf64-target.h" |
6968 | ||
6969 | /* FreeBSD L1OM support. */ | |
6970 | ||
6971 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6972 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
6973 | #undef TARGET_LITTLE_NAME |
6974 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
6975 | ||
6976 | #undef ELF_OSABI | |
6977 | #define ELF_OSABI ELFOSABI_FREEBSD | |
6978 | ||
6979 | #undef elf64_bed | |
6980 | #define elf64_bed elf64_l1om_fbsd_bed | |
6981 | ||
8a9036a4 | 6982 | #include "elf64-target.h" |
351f65ca | 6983 | |
7a9068fe L |
6984 | /* Intel K1OM support. */ |
6985 | ||
6986 | static bfd_boolean | |
6987 | elf64_k1om_elf_object_p (bfd *abfd) | |
6988 | { | |
6989 | /* Set the right machine number for an K1OM elf64 file. */ | |
6990 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
6991 | return TRUE; | |
6992 | } | |
6993 | ||
6994 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6995 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
6996 | #undef TARGET_LITTLE_NAME |
6997 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
6998 | #undef ELF_ARCH | |
6999 | #define ELF_ARCH bfd_arch_k1om | |
7000 | ||
7001 | #undef ELF_MACHINE_CODE | |
7002 | #define ELF_MACHINE_CODE EM_K1OM | |
7003 | ||
7004 | #undef ELF_OSABI | |
7005 | ||
7006 | #undef elf64_bed | |
7007 | #define elf64_bed elf64_k1om_bed | |
7008 | ||
7009 | #undef elf_backend_object_p | |
7010 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
7011 | ||
7012 | #undef elf_backend_static_tls_alignment | |
7013 | ||
7014 | #undef elf_backend_want_plt_sym | |
7015 | #define elf_backend_want_plt_sym 0 | |
7016 | ||
7017 | #include "elf64-target.h" | |
7018 | ||
7019 | /* FreeBSD K1OM support. */ | |
7020 | ||
7021 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7022 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
7023 | #undef TARGET_LITTLE_NAME |
7024 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
7025 | ||
7026 | #undef ELF_OSABI | |
7027 | #define ELF_OSABI ELFOSABI_FREEBSD | |
7028 | ||
7029 | #undef elf64_bed | |
7030 | #define elf64_bed elf64_k1om_fbsd_bed | |
7031 | ||
7032 | #include "elf64-target.h" | |
7033 | ||
351f65ca L |
7034 | /* 32bit x86-64 support. */ |
7035 | ||
351f65ca | 7036 | #undef TARGET_LITTLE_SYM |
6d00b590 | 7037 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
7038 | #undef TARGET_LITTLE_NAME |
7039 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 7040 | #undef elf32_bed |
351f65ca L |
7041 | |
7042 | #undef ELF_ARCH | |
7043 | #define ELF_ARCH bfd_arch_i386 | |
7044 | ||
7045 | #undef ELF_MACHINE_CODE | |
7046 | #define ELF_MACHINE_CODE EM_X86_64 | |
7047 | ||
351f65ca L |
7048 | #undef ELF_OSABI |
7049 | ||
351f65ca L |
7050 | #undef elf_backend_object_p |
7051 | #define elf_backend_object_p \ | |
7052 | elf32_x86_64_elf_object_p | |
7053 | ||
7054 | #undef elf_backend_bfd_from_remote_memory | |
7055 | #define elf_backend_bfd_from_remote_memory \ | |
7056 | _bfd_elf32_bfd_from_remote_memory | |
7057 | ||
7058 | #undef elf_backend_size_info | |
7059 | #define elf_backend_size_info \ | |
7060 | _bfd_elf32_size_info | |
7061 | ||
7062 | #include "elf32-target.h" |