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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 | */ | |
e62b9723 | 751 | #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \ |
aec6b87e L |
752 | ((EH)->elf.root.type == bfd_link_hash_undefweak \ |
753 | && bfd_link_executable (INFO) \ | |
754 | && (elf_x86_64_hash_table (INFO)->interp == NULL \ | |
e62b9723 | 755 | || !(GOT_RELOC) \ |
aec6b87e L |
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 | ||
e2cbcd91 L |
799 | /* 0: symbol isn't __tls_get_addr. |
800 | 1: symbol is __tls_get_addr. | |
801 | 2: symbol is unknown. */ | |
802 | unsigned int tls_get_addr : 2; | |
803 | ||
04ebc307 L |
804 | /* Reference count of C/C++ function pointer relocations in read-write |
805 | section which can be resolved at run-time. */ | |
806 | bfd_signed_vma func_pointer_refcount; | |
807 | ||
dd7e64d4 L |
808 | /* Information about the GOT PLT entry. Filled when there are both |
809 | GOT and PLT relocations against the same function. */ | |
810 | union gotplt_union plt_got; | |
811 | ||
0ff2b86e L |
812 | /* Information about the second PLT entry. Filled when has_bnd_reloc is |
813 | set. */ | |
814 | union gotplt_union plt_bnd; | |
815 | ||
67a4f2b7 AO |
816 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, |
817 | starting at the end of the jump table. */ | |
818 | bfd_vma tlsdesc_got; | |
bffbf940 JJ |
819 | }; |
820 | ||
351f65ca L |
821 | #define elf_x86_64_hash_entry(ent) \ |
822 | ((struct elf_x86_64_link_hash_entry *)(ent)) | |
bffbf940 | 823 | |
351f65ca | 824 | struct elf_x86_64_obj_tdata |
bffbf940 JJ |
825 | { |
826 | struct elf_obj_tdata root; | |
827 | ||
828 | /* tls_type for each local got entry. */ | |
829 | char *local_got_tls_type; | |
67a4f2b7 AO |
830 | |
831 | /* GOTPLT entries for TLS descriptors. */ | |
832 | bfd_vma *local_tlsdesc_gotent; | |
70256ad8 AJ |
833 | }; |
834 | ||
351f65ca L |
835 | #define elf_x86_64_tdata(abfd) \ |
836 | ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any) | |
bffbf940 | 837 | |
351f65ca L |
838 | #define elf_x86_64_local_got_tls_type(abfd) \ |
839 | (elf_x86_64_tdata (abfd)->local_got_tls_type) | |
bffbf940 | 840 | |
351f65ca L |
841 | #define elf_x86_64_local_tlsdesc_gotent(abfd) \ |
842 | (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent) | |
bffbf940 | 843 | |
0ffa91dd NC |
844 | #define is_x86_64_elf(bfd) \ |
845 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
846 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 847 | && elf_object_id (bfd) == X86_64_ELF_DATA) |
0ffa91dd NC |
848 | |
849 | static bfd_boolean | |
351f65ca | 850 | elf_x86_64_mkobject (bfd *abfd) |
0ffa91dd | 851 | { |
351f65ca | 852 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata), |
4dfe6ac6 | 853 | X86_64_ELF_DATA); |
0ffa91dd NC |
854 | } |
855 | ||
c434dee6 | 856 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 857 | |
351f65ca | 858 | struct elf_x86_64_link_hash_table |
407443a3 | 859 | { |
c434dee6 | 860 | struct elf_link_hash_table elf; |
70256ad8 | 861 | |
c434dee6 | 862 | /* Short-cuts to get to dynamic linker sections. */ |
aec6b87e | 863 | asection *interp; |
c434dee6 AJ |
864 | asection *sdynbss; |
865 | asection *srelbss; | |
e41b3a13 | 866 | asection *plt_eh_frame; |
0ff2b86e | 867 | asection *plt_bnd; |
dd7e64d4 | 868 | asection *plt_got; |
70256ad8 | 869 | |
4dfe6ac6 NC |
870 | union |
871 | { | |
bffbf940 JJ |
872 | bfd_signed_vma refcount; |
873 | bfd_vma offset; | |
874 | } tls_ld_got; | |
875 | ||
67a4f2b7 AO |
876 | /* The amount of space used by the jump slots in the GOT. */ |
877 | bfd_vma sgotplt_jump_table_size; | |
878 | ||
87d72d41 AM |
879 | /* Small local sym cache. */ |
880 | struct sym_cache sym_cache; | |
9f03412a | 881 | |
351f65ca L |
882 | bfd_vma (*r_info) (bfd_vma, bfd_vma); |
883 | bfd_vma (*r_sym) (bfd_vma); | |
248775ba | 884 | unsigned int pointer_r_type; |
351f65ca L |
885 | const char *dynamic_interpreter; |
886 | int dynamic_interpreter_size; | |
887 | ||
9f03412a AO |
888 | /* _TLS_MODULE_BASE_ symbol. */ |
889 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
890 | |
891 | /* Used by local STT_GNU_IFUNC symbols. */ | |
892 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
893 | void * loc_hash_memory; |
894 | ||
895 | /* The offset into splt of the PLT entry for the TLS descriptor | |
896 | resolver. Special values are 0, if not necessary (or not found | |
897 | to be necessary yet), and -1 if needed but not determined | |
898 | yet. */ | |
899 | bfd_vma tlsdesc_plt; | |
900 | /* The offset into sgot of the GOT entry used by the PLT entry | |
901 | above. */ | |
902 | bfd_vma tlsdesc_got; | |
e1f98742 L |
903 | |
904 | /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */ | |
905 | bfd_vma next_jump_slot_index; | |
906 | /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */ | |
907 | bfd_vma next_irelative_index; | |
2df3368d L |
908 | |
909 | /* TRUE if there are dynamic relocs against IFUNC symbols that apply | |
910 | to read-only sections. */ | |
911 | bfd_boolean readonly_dynrelocs_against_ifunc; | |
c434dee6 | 912 | }; |
70256ad8 AJ |
913 | |
914 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca | 915 | |
351f65ca | 916 | #define elf_x86_64_hash_table(p) \ |
4dfe6ac6 | 917 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
351f65ca | 918 | == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL) |
8d88c4ca | 919 | |
351f65ca | 920 | #define elf_x86_64_compute_jump_table_size(htab) \ |
6de2ae4a | 921 | ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE) |
67a4f2b7 | 922 | |
407443a3 | 923 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
924 | |
925 | static struct bfd_hash_entry * | |
351f65ca L |
926 | elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry, |
927 | struct bfd_hash_table *table, | |
928 | const char *string) | |
70256ad8 | 929 | { |
70256ad8 | 930 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
931 | subclass. */ |
932 | if (entry == NULL) | |
933 | { | |
a50b1753 | 934 | entry = (struct bfd_hash_entry *) |
eed180f8 RM |
935 | bfd_hash_allocate (table, |
936 | sizeof (struct elf_x86_64_link_hash_entry)); | |
c434dee6 AJ |
937 | if (entry == NULL) |
938 | return entry; | |
939 | } | |
70256ad8 AJ |
940 | |
941 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
942 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
943 | if (entry != NULL) | |
70256ad8 | 944 | { |
351f65ca | 945 | struct elf_x86_64_link_hash_entry *eh; |
c434dee6 | 946 | |
351f65ca | 947 | eh = (struct elf_x86_64_link_hash_entry *) entry; |
c434dee6 | 948 | eh->dyn_relocs = NULL; |
bffbf940 | 949 | eh->tls_type = GOT_UNKNOWN; |
bc696fd5 L |
950 | eh->needs_copy = 0; |
951 | eh->has_bnd_reloc = 0; | |
aec6b87e L |
952 | eh->has_got_reloc = 0; |
953 | eh->has_non_got_reloc = 0; | |
e2cbcd91 | 954 | eh->tls_get_addr = 2; |
04ebc307 | 955 | eh->func_pointer_refcount = 0; |
0ff2b86e | 956 | eh->plt_bnd.offset = (bfd_vma) -1; |
dd7e64d4 | 957 | eh->plt_got.offset = (bfd_vma) -1; |
67a4f2b7 | 958 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
959 | } |
960 | ||
c434dee6 | 961 | return entry; |
70256ad8 AJ |
962 | } |
963 | ||
c25bc9fc L |
964 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
965 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
966 | as global symbol. We reuse indx and dynstr_index for local symbol | |
967 | hash since they aren't used by global symbols in this backend. */ | |
968 | ||
969 | static hashval_t | |
351f65ca | 970 | elf_x86_64_local_htab_hash (const void *ptr) |
c25bc9fc L |
971 | { |
972 | struct elf_link_hash_entry *h | |
973 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 974 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
975 | } |
976 | ||
977 | /* Compare local hash entries. */ | |
978 | ||
979 | static int | |
351f65ca | 980 | elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2) |
c25bc9fc L |
981 | { |
982 | struct elf_link_hash_entry *h1 | |
983 | = (struct elf_link_hash_entry *) ptr1; | |
984 | struct elf_link_hash_entry *h2 | |
985 | = (struct elf_link_hash_entry *) ptr2; | |
986 | ||
987 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
988 | } | |
989 | ||
990 | /* Find and/or create a hash entry for local symbol. */ | |
991 | ||
992 | static struct elf_link_hash_entry * | |
351f65ca L |
993 | elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab, |
994 | bfd *abfd, const Elf_Internal_Rela *rel, | |
995 | bfd_boolean create) | |
c25bc9fc | 996 | { |
351f65ca | 997 | struct elf_x86_64_link_hash_entry e, *ret; |
c25bc9fc | 998 | asection *sec = abfd->sections; |
d2149d72 | 999 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
351f65ca | 1000 | htab->r_sym (rel->r_info)); |
c25bc9fc L |
1001 | void **slot; |
1002 | ||
1003 | e.elf.indx = sec->id; | |
351f65ca | 1004 | e.elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc L |
1005 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, |
1006 | create ? INSERT : NO_INSERT); | |
1007 | ||
1008 | if (!slot) | |
1009 | return NULL; | |
1010 | ||
1011 | if (*slot) | |
1012 | { | |
351f65ca | 1013 | ret = (struct elf_x86_64_link_hash_entry *) *slot; |
c25bc9fc L |
1014 | return &ret->elf; |
1015 | } | |
1016 | ||
351f65ca | 1017 | ret = (struct elf_x86_64_link_hash_entry *) |
c25bc9fc | 1018 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, |
351f65ca | 1019 | sizeof (struct elf_x86_64_link_hash_entry)); |
c25bc9fc L |
1020 | if (ret) |
1021 | { | |
1022 | memset (ret, 0, sizeof (*ret)); | |
1023 | ret->elf.indx = sec->id; | |
351f65ca | 1024 | ret->elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc | 1025 | ret->elf.dynindx = -1; |
04ebc307 | 1026 | ret->func_pointer_refcount = 0; |
dd7e64d4 | 1027 | ret->plt_got.offset = (bfd_vma) -1; |
c25bc9fc L |
1028 | *slot = ret; |
1029 | } | |
1030 | return &ret->elf; | |
1031 | } | |
1032 | ||
68faa637 AM |
1033 | /* Destroy an X86-64 ELF linker hash table. */ |
1034 | ||
1035 | static void | |
d495ab0d | 1036 | elf_x86_64_link_hash_table_free (bfd *obfd) |
68faa637 AM |
1037 | { |
1038 | struct elf_x86_64_link_hash_table *htab | |
d495ab0d | 1039 | = (struct elf_x86_64_link_hash_table *) obfd->link.hash; |
68faa637 AM |
1040 | |
1041 | if (htab->loc_hash_table) | |
1042 | htab_delete (htab->loc_hash_table); | |
1043 | if (htab->loc_hash_memory) | |
1044 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
d495ab0d | 1045 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
1046 | } |
1047 | ||
8d88c4ca NC |
1048 | /* Create an X86-64 ELF linker hash table. */ |
1049 | ||
1050 | static struct bfd_link_hash_table * | |
351f65ca | 1051 | elf_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca | 1052 | { |
351f65ca L |
1053 | struct elf_x86_64_link_hash_table *ret; |
1054 | bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table); | |
8d88c4ca | 1055 | |
7bf52ea2 | 1056 | ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt); |
c434dee6 | 1057 | if (ret == NULL) |
8d88c4ca NC |
1058 | return NULL; |
1059 | ||
eb4ff4d6 | 1060 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
351f65ca L |
1061 | elf_x86_64_link_hash_newfunc, |
1062 | sizeof (struct elf_x86_64_link_hash_entry), | |
4dfe6ac6 | 1063 | X86_64_ELF_DATA)) |
8d88c4ca | 1064 | { |
e2d34d7d | 1065 | free (ret); |
8d88c4ca NC |
1066 | return NULL; |
1067 | } | |
1068 | ||
351f65ca L |
1069 | if (ABI_64_P (abfd)) |
1070 | { | |
1071 | ret->r_info = elf64_r_info; | |
1072 | ret->r_sym = elf64_r_sym; | |
248775ba | 1073 | ret->pointer_r_type = R_X86_64_64; |
351f65ca L |
1074 | ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; |
1075 | ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; | |
1076 | } | |
1077 | else | |
1078 | { | |
1079 | ret->r_info = elf32_r_info; | |
1080 | ret->r_sym = elf32_r_sym; | |
248775ba | 1081 | ret->pointer_r_type = R_X86_64_32; |
351f65ca L |
1082 | ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; |
1083 | ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER; | |
1084 | } | |
1085 | ||
c25bc9fc | 1086 | ret->loc_hash_table = htab_try_create (1024, |
351f65ca L |
1087 | elf_x86_64_local_htab_hash, |
1088 | elf_x86_64_local_htab_eq, | |
c25bc9fc L |
1089 | NULL); |
1090 | ret->loc_hash_memory = objalloc_create (); | |
1091 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
1092 | { | |
d495ab0d | 1093 | elf_x86_64_link_hash_table_free (abfd); |
c25bc9fc L |
1094 | return NULL; |
1095 | } | |
d495ab0d | 1096 | ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free; |
c25bc9fc | 1097 | |
c434dee6 AJ |
1098 | return &ret->elf.root; |
1099 | } | |
1100 | ||
c434dee6 AJ |
1101 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
1102 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
1103 | hash table. */ | |
1104 | ||
b34976b6 | 1105 | static bfd_boolean |
351f65ca L |
1106 | elf_x86_64_create_dynamic_sections (bfd *dynobj, |
1107 | struct bfd_link_info *info) | |
c434dee6 | 1108 | { |
351f65ca | 1109 | struct elf_x86_64_link_hash_table *htab; |
c434dee6 | 1110 | |
c434dee6 | 1111 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 1112 | return FALSE; |
c434dee6 | 1113 | |
351f65ca | 1114 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1115 | if (htab == NULL) |
1116 | return FALSE; | |
1117 | ||
493f652c L |
1118 | /* Set the contents of the .interp section to the interpreter. */ |
1119 | if (bfd_link_executable (info) && !info->nointerp) | |
1120 | { | |
1121 | asection *s = bfd_get_linker_section (dynobj, ".interp"); | |
1122 | if (s == NULL) | |
1123 | abort (); | |
1124 | s->size = htab->dynamic_interpreter_size; | |
1125 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
1126 | htab->interp = s; | |
1127 | } | |
1128 | ||
3d4d4302 | 1129 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
9a926d55 | 1130 | if (!htab->sdynbss) |
c434dee6 AJ |
1131 | abort (); |
1132 | ||
0e1862bb | 1133 | if (bfd_link_executable (info)) |
9a926d55 L |
1134 | { |
1135 | /* Always allow copy relocs for building executables. */ | |
9d157cb9 | 1136 | asection *s = bfd_get_linker_section (dynobj, ".rela.bss"); |
9a926d55 L |
1137 | if (s == NULL) |
1138 | { | |
1139 | const struct elf_backend_data *bed = get_elf_backend_data (dynobj); | |
1140 | s = bfd_make_section_anyway_with_flags (dynobj, | |
1141 | ".rela.bss", | |
1142 | (bed->dynamic_sec_flags | |
1143 | | SEC_READONLY)); | |
1144 | if (s == NULL | |
1145 | || ! bfd_set_section_alignment (dynobj, s, | |
1146 | bed->s->log_file_align)) | |
1147 | return FALSE; | |
1148 | } | |
1149 | htab->srelbss = s; | |
1150 | } | |
1151 | ||
e41b3a13 | 1152 | if (!info->no_ld_generated_unwind_info |
2fe0fd06 | 1153 | && htab->plt_eh_frame == NULL |
e4de50d4 | 1154 | && htab->elf.splt != NULL) |
e41b3a13 | 1155 | { |
bbf96e4e L |
1156 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
1157 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1158 | | SEC_LINKER_CREATED); | |
e41b3a13 | 1159 | htab->plt_eh_frame |
bbf96e4e | 1160 | = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags); |
e41b3a13 JJ |
1161 | if (htab->plt_eh_frame == NULL |
1162 | || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3)) | |
1163 | return FALSE; | |
e41b3a13 | 1164 | } |
37567a2c L |
1165 | |
1166 | /* Align .got section to its entry size. */ | |
1167 | if (htab->elf.sgot != NULL | |
1168 | && !bfd_set_section_alignment (dynobj, htab->elf.sgot, 3)) | |
1169 | return FALSE; | |
1170 | ||
1171 | /* Align .got.plt section to its entry size. */ | |
1172 | if (htab->elf.sgotplt != NULL | |
1173 | && !bfd_set_section_alignment (dynobj, htab->elf.sgotplt, 3)) | |
1174 | return FALSE; | |
1175 | ||
b34976b6 | 1176 | return TRUE; |
c434dee6 AJ |
1177 | } |
1178 | ||
1179 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
1180 | ||
1181 | static void | |
351f65ca L |
1182 | elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
1183 | struct elf_link_hash_entry *dir, | |
1184 | struct elf_link_hash_entry *ind) | |
c434dee6 | 1185 | { |
351f65ca | 1186 | struct elf_x86_64_link_hash_entry *edir, *eind; |
c434dee6 | 1187 | |
351f65ca L |
1188 | edir = (struct elf_x86_64_link_hash_entry *) dir; |
1189 | eind = (struct elf_x86_64_link_hash_entry *) ind; | |
c434dee6 | 1190 | |
0ff2b86e L |
1191 | if (!edir->has_bnd_reloc) |
1192 | edir->has_bnd_reloc = eind->has_bnd_reloc; | |
1193 | ||
aec6b87e L |
1194 | if (!edir->has_got_reloc) |
1195 | edir->has_got_reloc = eind->has_got_reloc; | |
1196 | ||
1197 | if (!edir->has_non_got_reloc) | |
1198 | edir->has_non_got_reloc = eind->has_non_got_reloc; | |
1199 | ||
c434dee6 AJ |
1200 | if (eind->dyn_relocs != NULL) |
1201 | { | |
1202 | if (edir->dyn_relocs != NULL) | |
1203 | { | |
e03a8ed8 L |
1204 | struct elf_dyn_relocs **pp; |
1205 | struct elf_dyn_relocs *p; | |
c434dee6 | 1206 | |
fcfa13d2 | 1207 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
1208 | list. Merge any entries against the same section. */ |
1209 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1210 | { | |
e03a8ed8 | 1211 | struct elf_dyn_relocs *q; |
c434dee6 AJ |
1212 | |
1213 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1214 | if (q->sec == p->sec) | |
1215 | { | |
1216 | q->pc_count += p->pc_count; | |
1217 | q->count += p->count; | |
1218 | *pp = p->next; | |
1219 | break; | |
1220 | } | |
1221 | if (q == NULL) | |
1222 | pp = &p->next; | |
1223 | } | |
1224 | *pp = edir->dyn_relocs; | |
1225 | } | |
1226 | ||
1227 | edir->dyn_relocs = eind->dyn_relocs; | |
1228 | eind->dyn_relocs = NULL; | |
1229 | } | |
1230 | ||
bffbf940 JJ |
1231 | if (ind->root.type == bfd_link_hash_indirect |
1232 | && dir->got.refcount <= 0) | |
1233 | { | |
1234 | edir->tls_type = eind->tls_type; | |
1235 | eind->tls_type = GOT_UNKNOWN; | |
1236 | } | |
1237 | ||
d40d037c AJ |
1238 | if (ELIMINATE_COPY_RELOCS |
1239 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1240 | && dir->dynamic_adjusted) |
1241 | { | |
1242 | /* If called to transfer flags for a weakdef during processing | |
1243 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1244 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
1245 | dir->ref_dynamic |= ind->ref_dynamic; | |
1246 | dir->ref_regular |= ind->ref_regular; | |
1247 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1248 | dir->needs_plt |= ind->needs_plt; | |
1249 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1250 | } | |
d40d037c | 1251 | else |
04ebc307 L |
1252 | { |
1253 | if (eind->func_pointer_refcount > 0) | |
1254 | { | |
1255 | edir->func_pointer_refcount += eind->func_pointer_refcount; | |
1256 | eind->func_pointer_refcount = 0; | |
1257 | } | |
1258 | ||
1259 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
1260 | } | |
8d88c4ca NC |
1261 | } |
1262 | ||
b34976b6 | 1263 | static bfd_boolean |
27482721 | 1264 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 1265 | { |
8d88c4ca NC |
1266 | /* Set the right machine number for an x86-64 elf64 file. */ |
1267 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 1268 | return TRUE; |
8d88c4ca NC |
1269 | } |
1270 | ||
8059fb19 RM |
1271 | static bfd_boolean |
1272 | elf32_x86_64_elf_object_p (bfd *abfd) | |
1273 | { | |
1274 | /* Set the right machine number for an x86-64 elf32 file. */ | |
1275 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
1276 | return TRUE; | |
1277 | } | |
1278 | ||
142411ca L |
1279 | /* Return TRUE if the TLS access code sequence support transition |
1280 | from R_TYPE. */ | |
1281 | ||
1282 | static bfd_boolean | |
351f65ca L |
1283 | elf_x86_64_check_tls_transition (bfd *abfd, |
1284 | struct bfd_link_info *info, | |
1285 | asection *sec, | |
1286 | bfd_byte *contents, | |
1287 | Elf_Internal_Shdr *symtab_hdr, | |
1288 | struct elf_link_hash_entry **sym_hashes, | |
1289 | unsigned int r_type, | |
1290 | const Elf_Internal_Rela *rel, | |
1291 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1292 | { |
142411ca L |
1293 | unsigned int val; |
1294 | unsigned long r_symndx; | |
5c98a14e | 1295 | bfd_boolean largepic = FALSE; |
142411ca L |
1296 | struct elf_link_hash_entry *h; |
1297 | bfd_vma offset; | |
351f65ca | 1298 | struct elf_x86_64_link_hash_table *htab; |
e2cbcd91 L |
1299 | bfd_byte *call; |
1300 | bfd_boolean indirect_call, tls_get_addr; | |
142411ca | 1301 | |
351f65ca | 1302 | htab = elf_x86_64_hash_table (info); |
142411ca | 1303 | offset = rel->r_offset; |
bffbf940 | 1304 | switch (r_type) |
142411ca L |
1305 | { |
1306 | case R_X86_64_TLSGD: | |
1307 | case R_X86_64_TLSLD: | |
1308 | if ((rel + 1) >= relend) | |
1309 | return FALSE; | |
1310 | ||
1311 | if (r_type == R_X86_64_TLSGD) | |
1312 | { | |
52bc799a | 1313 | /* Check transition from GD access model. For 64bit, only |
142411ca | 1314 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
e2cbcd91 L |
1315 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1316 | or | |
1317 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
1318 | .byte 0x66; rex64 | |
1319 | call *__tls_get_addr@GOTPCREL(%rip) | |
1320 | which may be converted to | |
1321 | addr32 call __tls_get_addr | |
52bc799a L |
1322 | can transit to different access model. For 32bit, only |
1323 | leaq foo@tlsgd(%rip), %rdi | |
e2cbcd91 L |
1324 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1325 | or | |
1326 | leaq foo@tlsgd(%rip), %rdi | |
1327 | .byte 0x66; rex64 | |
1328 | call *__tls_get_addr@GOTPCREL(%rip) | |
1329 | which may be converted to | |
1330 | addr32 call __tls_get_addr | |
1331 | can transit to different access model. For largepic, | |
5c98a14e | 1332 | we also support: |
e2cbcd91 L |
1333 | leaq foo@tlsgd(%rip), %rdi |
1334 | movabsq $__tls_get_addr@pltoff, %rax | |
1335 | addq $r15, %rax | |
1336 | call *%rax | |
1337 | or | |
5c98a14e JJ |
1338 | leaq foo@tlsgd(%rip), %rdi |
1339 | movabsq $__tls_get_addr@pltoff, %rax | |
1340 | addq $rbx, %rax | |
e2cbcd91 | 1341 | call *%rax */ |
142411ca | 1342 | |
fa289a5f AM |
1343 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; |
1344 | ||
5c98a14e | 1345 | if ((offset + 12) > sec->size) |
142411ca | 1346 | return FALSE; |
52bc799a | 1347 | |
e2cbcd91 L |
1348 | call = contents + offset + 4; |
1349 | if (call[0] != 0x66 | |
1350 | || !((call[1] == 0x48 | |
1351 | && call[2] == 0xff | |
1352 | && call[3] == 0x15) | |
1353 | || (call[1] == 0x48 | |
1354 | && call[2] == 0x67 | |
1355 | && call[3] == 0xe8) | |
1356 | || (call[1] == 0x66 | |
1357 | && call[2] == 0x48 | |
1358 | && call[3] == 0xe8))) | |
5c98a14e JJ |
1359 | { |
1360 | if (!ABI_64_P (abfd) | |
1361 | || (offset + 19) > sec->size | |
1362 | || offset < 3 | |
e2cbcd91 L |
1363 | || memcmp (call - 7, leaq + 1, 3) != 0 |
1364 | || memcmp (call, "\x48\xb8", 2) != 0 | |
1365 | || call[11] != 0x01 | |
1366 | || call[13] != 0xff | |
1367 | || call[14] != 0xd0 | |
1368 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1369 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1370 | return FALSE; |
1371 | largepic = TRUE; | |
1372 | } | |
1373 | else if (ABI_64_P (abfd)) | |
52bc799a | 1374 | { |
52bc799a | 1375 | if (offset < 4 |
fa289a5f | 1376 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1377 | return FALSE; |
1378 | } | |
1379 | else | |
1380 | { | |
52bc799a | 1381 | if (offset < 3 |
fa289a5f | 1382 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1383 | return FALSE; |
1384 | } | |
e2cbcd91 | 1385 | indirect_call = call[2] == 0xff; |
142411ca L |
1386 | } |
1387 | else | |
1388 | { | |
1389 | /* Check transition from LD access model. Only | |
1390 | leaq foo@tlsld(%rip), %rdi; | |
e2cbcd91 L |
1391 | call __tls_get_addr@PLT |
1392 | or | |
1393 | leaq foo@tlsld(%rip), %rdi; | |
1394 | call *__tls_get_addr@GOTPCREL(%rip) | |
1395 | which may be converted to | |
1396 | addr32 call __tls_get_addr | |
5c98a14e JJ |
1397 | can transit to different access model. For largepic |
1398 | we also support: | |
e2cbcd91 L |
1399 | leaq foo@tlsld(%rip), %rdi |
1400 | movabsq $__tls_get_addr@pltoff, %rax | |
1401 | addq $r15, %rax | |
1402 | call *%rax | |
1403 | or | |
5c98a14e JJ |
1404 | leaq foo@tlsld(%rip), %rdi |
1405 | movabsq $__tls_get_addr@pltoff, %rax | |
1406 | addq $rbx, %rax | |
e2cbcd91 | 1407 | call *%rax */ |
142411ca | 1408 | |
fa289a5f | 1409 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1410 | |
1411 | if (offset < 3 || (offset + 9) > sec->size) | |
1412 | return FALSE; | |
1413 | ||
5c98a14e | 1414 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
142411ca | 1415 | return FALSE; |
5c98a14e | 1416 | |
e2cbcd91 L |
1417 | call = contents + offset + 4; |
1418 | if (!(call[0] == 0xe8 | |
1419 | || (call[0] == 0xff && call[1] == 0x15) | |
1420 | || (call[0] == 0x67 && call[1] == 0xe8))) | |
5c98a14e JJ |
1421 | { |
1422 | if (!ABI_64_P (abfd) | |
1423 | || (offset + 19) > sec->size | |
e2cbcd91 L |
1424 | || memcmp (call, "\x48\xb8", 2) != 0 |
1425 | || call[11] != 0x01 | |
1426 | || call[13] != 0xff | |
1427 | || call[14] != 0xd0 | |
1428 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1429 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1430 | return FALSE; |
1431 | largepic = TRUE; | |
1432 | } | |
e2cbcd91 | 1433 | indirect_call = call[0] == 0xff; |
142411ca L |
1434 | } |
1435 | ||
351f65ca | 1436 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1437 | if (r_symndx < symtab_hdr->sh_info) |
1438 | return FALSE; | |
1439 | ||
e2cbcd91 | 1440 | tls_get_addr = FALSE; |
142411ca | 1441 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
e2cbcd91 L |
1442 | if (h != NULL && h->root.root.string != NULL) |
1443 | { | |
1444 | struct elf_x86_64_link_hash_entry *eh | |
1445 | = (struct elf_x86_64_link_hash_entry *) h; | |
1446 | tls_get_addr = eh->tls_get_addr == 1; | |
1447 | if (eh->tls_get_addr > 1) | |
1448 | { | |
1449 | /* Use strncmp to check __tls_get_addr since | |
1450 | __tls_get_addr may be versioned. */ | |
1451 | if (strncmp (h->root.root.string, "__tls_get_addr", 14) | |
1452 | == 0) | |
1453 | { | |
1454 | eh->tls_get_addr = 1; | |
1455 | tls_get_addr = TRUE; | |
1456 | } | |
1457 | else | |
1458 | eh->tls_get_addr = 0; | |
1459 | } | |
1460 | } | |
1461 | ||
1462 | if (!tls_get_addr) | |
1463 | return FALSE; | |
1464 | else if (largepic) | |
1465 | return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64; | |
1466 | else if (indirect_call) | |
1467 | return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_GOTPCRELX; | |
1468 | else | |
1469 | return (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32 | |
1470 | || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
142411ca L |
1471 | |
1472 | case R_X86_64_GOTTPOFF: | |
1473 | /* Check transition from IE access model: | |
4a4c5f25 L |
1474 | mov foo@gottpoff(%rip), %reg |
1475 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1476 | */ |
1477 | ||
4a4c5f25 L |
1478 | /* Check REX prefix first. */ |
1479 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1480 | { | |
1481 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1482 | if (val != 0x48 && val != 0x4c) | |
1483 | { | |
1484 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1485 | if (ABI_64_P (abfd)) | |
1486 | return FALSE; | |
1487 | } | |
1488 | } | |
1489 | else | |
1490 | { | |
1491 | /* X32 may not have any REX prefix. */ | |
1492 | if (ABI_64_P (abfd)) | |
1493 | return FALSE; | |
1494 | if (offset < 2 || (offset + 3) > sec->size) | |
1495 | return FALSE; | |
1496 | } | |
142411ca L |
1497 | |
1498 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1499 | if (val != 0x8b && val != 0x03) | |
1500 | return FALSE; | |
1501 | ||
1502 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1503 | return (val & 0xc7) == 5; | |
1504 | ||
1505 | case R_X86_64_GOTPC32_TLSDESC: | |
1506 | /* Check transition from GDesc access model: | |
1507 | leaq x@tlsdesc(%rip), %rax | |
1508 | ||
1509 | Make sure it's a leaq adding rip to a 32-bit offset | |
1510 | into any register, although it's probably almost always | |
1511 | going to be rax. */ | |
1512 | ||
1513 | if (offset < 3 || (offset + 4) > sec->size) | |
1514 | return FALSE; | |
1515 | ||
1516 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1517 | if ((val & 0xfb) != 0x48) | |
1518 | return FALSE; | |
1519 | ||
1520 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1521 | return FALSE; | |
1522 | ||
1523 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1524 | return (val & 0xc7) == 0x05; | |
1525 | ||
1526 | case R_X86_64_TLSDESC_CALL: | |
1527 | /* Check transition from GDesc access model: | |
1528 | call *x@tlsdesc(%rax) | |
1529 | */ | |
1530 | if (offset + 2 <= sec->size) | |
1531 | { | |
1532 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
e2cbcd91 L |
1533 | call = contents + offset; |
1534 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1535 | } |
1536 | ||
1537 | return FALSE; | |
1538 | ||
1539 | default: | |
1540 | abort (); | |
1541 | } | |
1542 | } | |
1543 | ||
1544 | /* Return TRUE if the TLS access transition is OK or no transition | |
1545 | will be performed. Update R_TYPE if there is a transition. */ | |
1546 | ||
1547 | static bfd_boolean | |
351f65ca L |
1548 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1549 | asection *sec, bfd_byte *contents, | |
1550 | Elf_Internal_Shdr *symtab_hdr, | |
1551 | struct elf_link_hash_entry **sym_hashes, | |
1552 | unsigned int *r_type, int tls_type, | |
1553 | const Elf_Internal_Rela *rel, | |
1554 | const Elf_Internal_Rela *relend, | |
1555 | struct elf_link_hash_entry *h, | |
bedfd056 L |
1556 | unsigned long r_symndx, |
1557 | bfd_boolean from_relocate_section) | |
142411ca L |
1558 | { |
1559 | unsigned int from_type = *r_type; | |
1560 | unsigned int to_type = from_type; | |
1561 | bfd_boolean check = TRUE; | |
1562 | ||
bb1cb422 L |
1563 | /* Skip TLS transition for functions. */ |
1564 | if (h != NULL | |
1565 | && (h->type == STT_FUNC | |
1566 | || h->type == STT_GNU_IFUNC)) | |
1567 | return TRUE; | |
1568 | ||
142411ca | 1569 | switch (from_type) |
bffbf940 JJ |
1570 | { |
1571 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1572 | case R_X86_64_GOTPC32_TLSDESC: |
1573 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1574 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1575 | if (bfd_link_executable (info)) |
142411ca L |
1576 | { |
1577 | if (h == NULL) | |
1578 | to_type = R_X86_64_TPOFF32; | |
1579 | else | |
1580 | to_type = R_X86_64_GOTTPOFF; | |
1581 | } | |
1582 | ||
bedfd056 L |
1583 | /* When we are called from elf_x86_64_relocate_section, there may |
1584 | be additional transitions based on TLS_TYPE. */ | |
1585 | if (from_relocate_section) | |
142411ca L |
1586 | { |
1587 | unsigned int new_to_type = to_type; | |
1588 | ||
0e1862bb | 1589 | if (bfd_link_executable (info) |
142411ca L |
1590 | && h != NULL |
1591 | && h->dynindx == -1 | |
1592 | && tls_type == GOT_TLS_IE) | |
1593 | new_to_type = R_X86_64_TPOFF32; | |
1594 | ||
1595 | if (to_type == R_X86_64_TLSGD | |
1596 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1597 | || to_type == R_X86_64_TLSDESC_CALL) | |
1598 | { | |
1599 | if (tls_type == GOT_TLS_IE) | |
1600 | new_to_type = R_X86_64_GOTTPOFF; | |
1601 | } | |
1602 | ||
1603 | /* We checked the transition before when we were called from | |
351f65ca | 1604 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1605 | transition which hasn't been checked before. */ |
1606 | check = new_to_type != to_type && from_type == to_type; | |
1607 | to_type = new_to_type; | |
1608 | } | |
1609 | ||
1610 | break; | |
1611 | ||
bffbf940 | 1612 | case R_X86_64_TLSLD: |
0e1862bb | 1613 | if (bfd_link_executable (info)) |
142411ca L |
1614 | to_type = R_X86_64_TPOFF32; |
1615 | break; | |
1616 | ||
1617 | default: | |
1618 | return TRUE; | |
bffbf940 JJ |
1619 | } |
1620 | ||
142411ca L |
1621 | /* Return TRUE if there is no transition. */ |
1622 | if (from_type == to_type) | |
1623 | return TRUE; | |
1624 | ||
1625 | /* Check if the transition can be performed. */ | |
1626 | if (check | |
351f65ca L |
1627 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1628 | symtab_hdr, sym_hashes, | |
1629 | from_type, rel, relend)) | |
142411ca | 1630 | { |
2f629d23 | 1631 | reloc_howto_type *from, *to; |
4c544807 | 1632 | const char *name; |
142411ca | 1633 | |
351f65ca L |
1634 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1635 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1636 | |
4c544807 L |
1637 | if (h) |
1638 | name = h->root.root.string; | |
1639 | else | |
1640 | { | |
351f65ca | 1641 | struct elf_x86_64_link_hash_table *htab; |
4dfe6ac6 | 1642 | |
351f65ca | 1643 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1644 | if (htab == NULL) |
1645 | name = "*unknown*"; | |
1646 | else | |
1647 | { | |
1648 | Elf_Internal_Sym *isym; | |
1649 | ||
1650 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1651 | abfd, r_symndx); | |
1652 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1653 | } | |
4c544807 L |
1654 | } |
1655 | ||
142411ca L |
1656 | (*_bfd_error_handler) |
1657 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1658 | "in section `%A' failed"), | |
4c544807 | 1659 | abfd, sec, from->name, to->name, name, |
142411ca L |
1660 | (unsigned long) rel->r_offset); |
1661 | bfd_set_error (bfd_error_bad_value); | |
1662 | return FALSE; | |
1663 | } | |
1664 | ||
1665 | *r_type = to_type; | |
1666 | return TRUE; | |
bffbf940 JJ |
1667 | } |
1668 | ||
c1d11331 L |
1669 | /* Rename some of the generic section flags to better document how they |
1670 | are used here. */ | |
338c190a L |
1671 | #define need_convert_load sec_flg0 |
1672 | #define check_relocs_failed sec_flg1 | |
1673 | ||
1674 | static bfd_boolean | |
1675 | elf_x86_64_need_pic (bfd *input_bfd, asection *sec, | |
1676 | struct elf_link_hash_entry *h, | |
1677 | Elf_Internal_Shdr *symtab_hdr, | |
1678 | Elf_Internal_Sym *isym, | |
1679 | reloc_howto_type *howto) | |
1680 | { | |
1681 | const char *v = ""; | |
1682 | const char *und = ""; | |
1683 | const char *pic = ""; | |
1684 | ||
1685 | const char *name; | |
1686 | if (h) | |
1687 | { | |
1688 | name = h->root.root.string; | |
1689 | switch (ELF_ST_VISIBILITY (h->other)) | |
1690 | { | |
1691 | case STV_HIDDEN: | |
1692 | v = _("hidden symbol "); | |
1693 | break; | |
1694 | case STV_INTERNAL: | |
1695 | v = _("internal symbol "); | |
1696 | break; | |
1697 | case STV_PROTECTED: | |
1698 | v = _("protected symbol "); | |
1699 | break; | |
1700 | default: | |
1701 | v = _("symbol "); | |
1702 | pic = _("; recompile with -fPIC"); | |
1703 | break; | |
1704 | } | |
1705 | ||
1706 | if (!h->def_regular && !h->def_dynamic) | |
1707 | und = _("undefined "); | |
1708 | } | |
1709 | else | |
1710 | { | |
1711 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL); | |
1712 | pic = _("; recompile with -fPIC"); | |
1713 | } | |
1714 | ||
1715 | (*_bfd_error_handler) (_("%B: relocation %s against %s%s`%s' can " | |
1716 | "not be used when making a shared object%s"), | |
1717 | input_bfd, howto->name, und, v, name, pic); | |
1718 | bfd_set_error (bfd_error_bad_value); | |
1719 | sec->check_relocs_failed = 1; | |
1720 | return FALSE; | |
1721 | } | |
c1d11331 | 1722 | |
c175a657 L |
1723 | /* With the local symbol, foo, we convert |
1724 | mov foo@GOTPCREL(%rip), %reg | |
1725 | to | |
1726 | lea foo(%rip), %reg | |
1727 | and convert | |
1728 | call/jmp *foo@GOTPCREL(%rip) | |
1729 | to | |
1730 | nop call foo/jmp foo nop | |
1731 | When PIC is false, convert | |
1732 | test %reg, foo@GOTPCREL(%rip) | |
1733 | to | |
1734 | test $foo, %reg | |
1735 | and convert | |
1736 | binop foo@GOTPCREL(%rip), %reg | |
1737 | to | |
1738 | binop $foo, %reg | |
1739 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1740 | instructions. */ | |
1741 | ||
1742 | static bfd_boolean | |
1743 | elf_x86_64_convert_load_reloc (bfd *abfd, asection *sec, | |
1744 | bfd_byte *contents, | |
1745 | Elf_Internal_Rela *irel, | |
1746 | struct elf_link_hash_entry *h, | |
1747 | bfd_boolean *converted, | |
1748 | struct bfd_link_info *link_info) | |
1749 | { | |
1750 | struct elf_x86_64_link_hash_table *htab; | |
1751 | bfd_boolean is_pic; | |
1752 | bfd_boolean require_reloc_pc32; | |
1753 | bfd_boolean relocx; | |
1754 | bfd_boolean to_reloc_pc32; | |
1755 | asection *tsec; | |
1756 | char symtype; | |
1757 | bfd_signed_vma raddend; | |
1758 | unsigned int opcode; | |
1759 | unsigned int modrm; | |
1760 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
1761 | unsigned int r_symndx; | |
1762 | bfd_vma toff; | |
1763 | bfd_vma roff = irel->r_offset; | |
1764 | ||
1765 | if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2)) | |
1766 | return TRUE; | |
1767 | ||
1768 | raddend = irel->r_addend; | |
1769 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
1770 | if (raddend != -4) | |
1771 | return TRUE; | |
1772 | ||
1773 | htab = elf_x86_64_hash_table (link_info); | |
1774 | is_pic = bfd_link_pic (link_info); | |
1775 | ||
1776 | relocx = (r_type == R_X86_64_GOTPCRELX | |
1777 | || r_type == R_X86_64_REX_GOTPCRELX); | |
1778 | ||
1779 | /* TRUE if we can convert only to R_X86_64_PC32. Enable it for | |
1780 | --no-relax. */ | |
1781 | require_reloc_pc32 | |
1782 | = link_info->disable_target_specific_optimizations > 1; | |
1783 | ||
1784 | r_symndx = htab->r_sym (irel->r_info); | |
1785 | ||
1786 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1787 | ||
1788 | /* Convert mov to lea since it has been done for a while. */ | |
1789 | if (opcode != 0x8b) | |
1790 | { | |
1791 | /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX | |
1792 | for call, jmp or one of adc, add, and, cmp, or, sbb, sub, | |
1793 | test, xor instructions. */ | |
1794 | if (!relocx) | |
1795 | return TRUE; | |
1796 | } | |
1797 | ||
1798 | /* We convert only to R_X86_64_PC32: | |
1799 | 1. Branch. | |
1800 | 2. R_X86_64_GOTPCREL since we can't modify REX byte. | |
1801 | 3. require_reloc_pc32 is true. | |
1802 | 4. PIC. | |
1803 | */ | |
1804 | to_reloc_pc32 = (opcode == 0xff | |
1805 | || !relocx | |
1806 | || require_reloc_pc32 | |
1807 | || is_pic); | |
1808 | ||
1809 | /* Get the symbol referred to by the reloc. */ | |
1810 | if (h == NULL) | |
1811 | { | |
1812 | Elf_Internal_Sym *isym | |
1813 | = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx); | |
1814 | ||
1815 | /* Skip relocation against undefined symbols. */ | |
1816 | if (isym->st_shndx == SHN_UNDEF) | |
1817 | return TRUE; | |
1818 | ||
1819 | symtype = ELF_ST_TYPE (isym->st_info); | |
1820 | ||
1821 | if (isym->st_shndx == SHN_ABS) | |
1822 | tsec = bfd_abs_section_ptr; | |
1823 | else if (isym->st_shndx == SHN_COMMON) | |
1824 | tsec = bfd_com_section_ptr; | |
1825 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
1826 | tsec = &_bfd_elf_large_com_section; | |
1827 | else | |
1828 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1829 | ||
1830 | toff = isym->st_value; | |
1831 | } | |
1832 | else | |
1833 | { | |
1834 | /* Undefined weak symbol is only bound locally in executable | |
1835 | and its reference is resolved as 0 without relocation | |
1836 | overflow. We can only perform this optimization for | |
1837 | GOTPCRELX relocations since we need to modify REX byte. | |
1838 | It is OK convert mov with R_X86_64_GOTPCREL to | |
1839 | R_X86_64_PC32. */ | |
1840 | if ((relocx || opcode == 0x8b) | |
1841 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, | |
1842 | TRUE, | |
1843 | elf_x86_64_hash_entry (h))) | |
1844 | { | |
1845 | if (opcode == 0xff) | |
1846 | { | |
1847 | /* Skip for branch instructions since R_X86_64_PC32 | |
1848 | may overflow. */ | |
1849 | if (require_reloc_pc32) | |
1850 | return TRUE; | |
1851 | } | |
1852 | else if (relocx) | |
1853 | { | |
1854 | /* For non-branch instructions, we can convert to | |
1855 | R_X86_64_32/R_X86_64_32S since we know if there | |
1856 | is a REX byte. */ | |
1857 | to_reloc_pc32 = FALSE; | |
1858 | } | |
1859 | ||
1860 | /* Since we don't know the current PC when PIC is true, | |
1861 | we can't convert to R_X86_64_PC32. */ | |
1862 | if (to_reloc_pc32 && is_pic) | |
1863 | return TRUE; | |
1864 | ||
1865 | goto convert; | |
1866 | } | |
1867 | /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since | |
1868 | ld.so may use its link-time address. */ | |
1869 | else if ((h->def_regular | |
1870 | || h->root.type == bfd_link_hash_defined | |
1871 | || h->root.type == bfd_link_hash_defweak) | |
1872 | && h != htab->elf.hdynamic | |
1873 | && SYMBOL_REFERENCES_LOCAL (link_info, h)) | |
1874 | { | |
1875 | /* bfd_link_hash_new or bfd_link_hash_undefined is | |
1876 | set by an assignment in a linker script in | |
1877 | bfd_elf_record_link_assignment. */ | |
1878 | if (h->def_regular | |
1879 | && (h->root.type == bfd_link_hash_new | |
1880 | || h->root.type == bfd_link_hash_undefined)) | |
1881 | { | |
1882 | /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */ | |
1883 | if (require_reloc_pc32) | |
1884 | return TRUE; | |
1885 | goto convert; | |
1886 | } | |
1887 | tsec = h->root.u.def.section; | |
1888 | toff = h->root.u.def.value; | |
1889 | symtype = h->type; | |
1890 | } | |
1891 | else | |
1892 | return TRUE; | |
1893 | } | |
1894 | ||
2168b268 L |
1895 | /* Don't convert GOTPCREL relocation against large section. */ |
1896 | if (elf_section_data (tsec) != NULL | |
1897 | && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0) | |
1898 | return TRUE; | |
1899 | ||
c175a657 L |
1900 | /* We can only estimate relocation overflow for R_X86_64_PC32. */ |
1901 | if (!to_reloc_pc32) | |
1902 | goto convert; | |
1903 | ||
1904 | if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE) | |
1905 | { | |
1906 | /* At this stage in linking, no SEC_MERGE symbol has been | |
1907 | adjusted, so all references to such symbols need to be | |
1908 | passed through _bfd_merged_section_offset. (Later, in | |
1909 | relocate_section, all SEC_MERGE symbols *except* for | |
1910 | section symbols have been adjusted.) | |
1911 | ||
1912 | gas may reduce relocations against symbols in SEC_MERGE | |
1913 | sections to a relocation against the section symbol when | |
1914 | the original addend was zero. When the reloc is against | |
1915 | a section symbol we should include the addend in the | |
1916 | offset passed to _bfd_merged_section_offset, since the | |
1917 | location of interest is the original symbol. On the | |
1918 | other hand, an access to "sym+addend" where "sym" is not | |
1919 | a section symbol should not include the addend; Such an | |
1920 | access is presumed to be an offset from "sym"; The | |
1921 | location of interest is just "sym". */ | |
1922 | if (symtype == STT_SECTION) | |
1923 | toff += raddend; | |
1924 | ||
1925 | toff = _bfd_merged_section_offset (abfd, &tsec, | |
1926 | elf_section_data (tsec)->sec_info, | |
1927 | toff); | |
1928 | ||
1929 | if (symtype != STT_SECTION) | |
1930 | toff += raddend; | |
1931 | } | |
1932 | else | |
1933 | toff += raddend; | |
1934 | ||
1935 | /* Don't convert if R_X86_64_PC32 relocation overflows. */ | |
1936 | if (tsec->output_section == sec->output_section) | |
1937 | { | |
1938 | if ((toff - roff + 0x80000000) > 0xffffffff) | |
1939 | return TRUE; | |
1940 | } | |
1941 | else | |
1942 | { | |
1943 | bfd_signed_vma distance; | |
1944 | ||
1945 | /* At this point, we don't know the load addresses of TSEC | |
1946 | section nor SEC section. We estimate the distrance between | |
1947 | SEC and TSEC. We store the estimated distances in the | |
1948 | compressed_size field of the output section, which is only | |
1949 | used to decompress the compressed input section. */ | |
1950 | if (sec->output_section->compressed_size == 0) | |
1951 | { | |
1952 | asection *asect; | |
1953 | bfd_size_type size = 0; | |
1954 | for (asect = link_info->output_bfd->sections; | |
1955 | asect != NULL; | |
1956 | asect = asect->next) | |
1957 | /* Skip debug sections since compressed_size is used to | |
1958 | compress debug sections. */ | |
1959 | if ((asect->flags & SEC_DEBUGGING) == 0) | |
1960 | { | |
1961 | asection *i; | |
1962 | for (i = asect->map_head.s; | |
1963 | i != NULL; | |
1964 | i = i->map_head.s) | |
1965 | { | |
1966 | size = align_power (size, i->alignment_power); | |
1967 | size += i->size; | |
1968 | } | |
1969 | asect->compressed_size = size; | |
1970 | } | |
1971 | } | |
1972 | ||
1973 | /* Don't convert GOTPCREL relocations if TSEC isn't placed | |
1974 | after SEC. */ | |
1975 | distance = (tsec->output_section->compressed_size | |
1976 | - sec->output_section->compressed_size); | |
1977 | if (distance < 0) | |
1978 | return TRUE; | |
1979 | ||
1980 | /* Take PT_GNU_RELRO segment into account by adding | |
1981 | maxpagesize. */ | |
1982 | if ((toff + distance + get_elf_backend_data (abfd)->maxpagesize | |
1983 | - roff + 0x80000000) > 0xffffffff) | |
1984 | return TRUE; | |
1985 | } | |
1986 | ||
1987 | convert: | |
1988 | if (opcode == 0xff) | |
1989 | { | |
1990 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
1991 | unsigned int nop; | |
1992 | unsigned int disp; | |
1993 | bfd_vma nop_offset; | |
1994 | ||
1995 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
1996 | R_X86_64_PC32. */ | |
1997 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1998 | if (modrm == 0x25) | |
1999 | { | |
2000 | /* Convert to "jmp foo nop". */ | |
2001 | modrm = 0xe9; | |
2002 | nop = NOP_OPCODE; | |
2003 | nop_offset = irel->r_offset + 3; | |
2004 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
2005 | irel->r_offset -= 1; | |
2006 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
2007 | } | |
2008 | else | |
2009 | { | |
e2cbcd91 L |
2010 | struct elf_x86_64_link_hash_entry *eh |
2011 | = (struct elf_x86_64_link_hash_entry *) h; | |
2012 | ||
c175a657 L |
2013 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
2014 | is a nop prefix. */ | |
2015 | modrm = 0xe8; | |
e2cbcd91 L |
2016 | /* To support TLS optimization, always use addr32 prefix for |
2017 | "call *__tls_get_addr@GOTPCREL(%rip)". */ | |
2018 | if (eh && eh->tls_get_addr == 1) | |
c175a657 | 2019 | { |
e2cbcd91 L |
2020 | nop = 0x67; |
2021 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
2022 | } |
2023 | else | |
e2cbcd91 L |
2024 | { |
2025 | nop = link_info->call_nop_byte; | |
2026 | if (link_info->call_nop_as_suffix) | |
2027 | { | |
2028 | nop_offset = irel->r_offset + 3; | |
2029 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
2030 | irel->r_offset -= 1; | |
2031 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
2032 | } | |
2033 | else | |
2034 | nop_offset = irel->r_offset - 2; | |
2035 | } | |
c175a657 L |
2036 | } |
2037 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
2038 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
2039 | r_type = R_X86_64_PC32; | |
2040 | } | |
2041 | else | |
2042 | { | |
2043 | unsigned int rex; | |
2044 | unsigned int rex_mask = REX_R; | |
2045 | ||
2046 | if (r_type == R_X86_64_REX_GOTPCRELX) | |
2047 | rex = bfd_get_8 (abfd, contents + roff - 3); | |
2048 | else | |
2049 | rex = 0; | |
2050 | ||
2051 | if (opcode == 0x8b) | |
2052 | { | |
2053 | if (to_reloc_pc32) | |
2054 | { | |
2055 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
2056 | "lea foo(%rip), %reg". */ | |
2057 | opcode = 0x8d; | |
2058 | r_type = R_X86_64_PC32; | |
2059 | } | |
2060 | else | |
2061 | { | |
2062 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
2063 | "mov $foo, %reg". */ | |
2064 | opcode = 0xc7; | |
2065 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
2066 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
2067 | if ((rex & REX_W) != 0 | |
2068 | && ABI_64_P (link_info->output_bfd)) | |
2069 | { | |
2070 | /* Keep the REX_W bit in REX byte for LP64. */ | |
2071 | r_type = R_X86_64_32S; | |
2072 | goto rewrite_modrm_rex; | |
2073 | } | |
2074 | else | |
2075 | { | |
2076 | /* If the REX_W bit in REX byte isn't needed, | |
2077 | use R_X86_64_32 and clear the W bit to avoid | |
2078 | sign-extend imm32 to imm64. */ | |
2079 | r_type = R_X86_64_32; | |
2080 | /* Clear the W bit in REX byte. */ | |
2081 | rex_mask |= REX_W; | |
2082 | goto rewrite_modrm_rex; | |
2083 | } | |
2084 | } | |
2085 | } | |
2086 | else | |
2087 | { | |
2088 | /* R_X86_64_PC32 isn't supported. */ | |
2089 | if (to_reloc_pc32) | |
2090 | return TRUE; | |
2091 | ||
2092 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
2093 | if (opcode == 0x85) | |
2094 | { | |
2095 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
2096 | "test $foo, %reg". */ | |
2097 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
2098 | opcode = 0xf7; | |
2099 | } | |
2100 | else | |
2101 | { | |
2102 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
2103 | "binop $foo, %reg". */ | |
2104 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
2105 | opcode = 0x81; | |
2106 | } | |
2107 | ||
2108 | /* Use R_X86_64_32 with 32-bit operand to avoid relocation | |
2109 | overflow when sign-extending imm32 to imm64. */ | |
2110 | r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32; | |
2111 | ||
2112 | rewrite_modrm_rex: | |
2113 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
2114 | ||
2115 | if (rex) | |
2116 | { | |
2117 | /* Move the R bit to the B bit in REX byte. */ | |
2118 | rex = (rex & ~rex_mask) | (rex & REX_R) >> 2; | |
2119 | bfd_put_8 (abfd, rex, contents + roff - 3); | |
2120 | } | |
2121 | ||
2122 | /* No addend for R_X86_64_32/R_X86_64_32S relocations. */ | |
2123 | irel->r_addend = 0; | |
2124 | } | |
2125 | ||
2126 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
2127 | } | |
2128 | ||
2129 | irel->r_info = htab->r_info (r_symndx, r_type); | |
2130 | ||
2131 | *converted = TRUE; | |
2132 | ||
2133 | return TRUE; | |
2134 | } | |
2135 | ||
70256ad8 | 2136 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
2137 | calculate needed space in the global offset table, procedure |
2138 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 2139 | |
b34976b6 | 2140 | static bfd_boolean |
351f65ca L |
2141 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
2142 | asection *sec, | |
2143 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 2144 | { |
351f65ca | 2145 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2146 | Elf_Internal_Shdr *symtab_hdr; |
2147 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
2148 | const Elf_Internal_Rela *rel; |
2149 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 2150 | asection *sreloc; |
bedfd056 | 2151 | bfd_byte *contents; |
dd7e64d4 | 2152 | bfd_boolean use_plt_got; |
70256ad8 | 2153 | |
0e1862bb | 2154 | if (bfd_link_relocatable (info)) |
b34976b6 | 2155 | return TRUE; |
70256ad8 | 2156 | |
081b1afe L |
2157 | /* Don't do anything special with non-loaded, non-alloced sections. |
2158 | In particular, any relocs in such sections should not affect GOT | |
2159 | and PLT reference counting (ie. we don't allow them to create GOT | |
2160 | or PLT entries), there's no possibility or desire to optimize TLS | |
2161 | relocs, and there's not much point in propagating relocs to shared | |
2162 | libs that the dynamic linker won't relocate. */ | |
2163 | if ((sec->flags & SEC_ALLOC) == 0) | |
2164 | return TRUE; | |
2165 | ||
0ffa91dd NC |
2166 | BFD_ASSERT (is_x86_64_elf (abfd)); |
2167 | ||
351f65ca | 2168 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 | 2169 | if (htab == NULL) |
afd9acee L |
2170 | { |
2171 | sec->check_relocs_failed = 1; | |
2172 | return FALSE; | |
2173 | } | |
4dfe6ac6 | 2174 | |
bedfd056 L |
2175 | /* Get the section contents. */ |
2176 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2177 | contents = elf_section_data (sec)->this_hdr.contents; | |
2178 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2179 | { | |
2180 | sec->check_relocs_failed = 1; | |
2181 | return FALSE; | |
2182 | } | |
2183 | ||
dd7e64d4 L |
2184 | use_plt_got = get_elf_x86_64_backend_data (abfd) == &elf_x86_64_arch_bed; |
2185 | ||
0ffa91dd | 2186 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 2187 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 2188 | |
c434dee6 | 2189 | sreloc = NULL; |
cbe950e9 | 2190 | |
70256ad8 AJ |
2191 | rel_end = relocs + sec->reloc_count; |
2192 | for (rel = relocs; rel < rel_end; rel++) | |
2193 | { | |
bffbf940 | 2194 | unsigned int r_type; |
70256ad8 AJ |
2195 | unsigned long r_symndx; |
2196 | struct elf_link_hash_entry *h; | |
aec6b87e | 2197 | struct elf_x86_64_link_hash_entry *eh; |
4c544807 L |
2198 | Elf_Internal_Sym *isym; |
2199 | const char *name; | |
06a6a421 | 2200 | bfd_boolean size_reloc; |
70256ad8 | 2201 | |
351f65ca L |
2202 | r_symndx = htab->r_sym (rel->r_info); |
2203 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
2204 | |
2205 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
2206 | { | |
d003868e AM |
2207 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
2208 | abfd, r_symndx); | |
afd9acee | 2209 | goto error_return; |
c434dee6 AJ |
2210 | } |
2211 | ||
70256ad8 | 2212 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
2213 | { |
2214 | /* A local symbol. */ | |
c2e61a4e L |
2215 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
2216 | abfd, r_symndx); | |
2217 | if (isym == NULL) | |
afd9acee | 2218 | goto error_return; |
c25bc9fc L |
2219 | |
2220 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 2221 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 2222 | { |
351f65ca L |
2223 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, |
2224 | TRUE); | |
c25bc9fc | 2225 | if (h == NULL) |
afd9acee | 2226 | goto error_return; |
6bbec505 | 2227 | |
c25bc9fc L |
2228 | /* Fake a STT_GNU_IFUNC symbol. */ |
2229 | h->type = STT_GNU_IFUNC; | |
2230 | h->def_regular = 1; | |
2231 | h->ref_regular = 1; | |
2232 | h->forced_local = 1; | |
2233 | h->root.type = bfd_link_hash_defined; | |
2234 | } | |
2235 | else | |
2236 | h = NULL; | |
2237 | } | |
70256ad8 | 2238 | else |
71cb9464 | 2239 | { |
4c544807 | 2240 | isym = NULL; |
71cb9464 L |
2241 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
2242 | while (h->root.type == bfd_link_hash_indirect | |
2243 | || h->root.type == bfd_link_hash_warning) | |
2244 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 2245 | } |
cbe950e9 | 2246 | |
d1534d16 L |
2247 | /* Check invalid x32 relocations. */ |
2248 | if (!ABI_64_P (abfd)) | |
2249 | switch (r_type) | |
2250 | { | |
2251 | default: | |
2252 | break; | |
2253 | ||
d1534d16 L |
2254 | case R_X86_64_DTPOFF64: |
2255 | case R_X86_64_TPOFF64: | |
2256 | case R_X86_64_PC64: | |
2257 | case R_X86_64_GOTOFF64: | |
2258 | case R_X86_64_GOT64: | |
2259 | case R_X86_64_GOTPCREL64: | |
2260 | case R_X86_64_GOTPC64: | |
2261 | case R_X86_64_GOTPLT64: | |
2262 | case R_X86_64_PLTOFF64: | |
2263 | { | |
2264 | if (h) | |
2265 | name = h->root.root.string; | |
2266 | else | |
2267 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
2268 | NULL); | |
2269 | (*_bfd_error_handler) | |
2270 | (_("%B: relocation %s against symbol `%s' isn't " | |
2271 | "supported in x32 mode"), abfd, | |
2272 | x86_64_elf_howto_table[r_type].name, name); | |
2273 | bfd_set_error (bfd_error_bad_value); | |
afd9acee | 2274 | goto error_return; |
d1534d16 L |
2275 | } |
2276 | break; | |
2277 | } | |
2278 | ||
c25bc9fc L |
2279 | if (h != NULL) |
2280 | { | |
cbe950e9 L |
2281 | switch (r_type) |
2282 | { | |
2283 | default: | |
2284 | break; | |
2285 | ||
0ff2b86e L |
2286 | case R_X86_64_PC32_BND: |
2287 | case R_X86_64_PLT32_BND: | |
d258b828 IZ |
2288 | case R_X86_64_PC32: |
2289 | case R_X86_64_PLT32: | |
2290 | case R_X86_64_32: | |
2291 | case R_X86_64_64: | |
0ff2b86e L |
2292 | /* MPX PLT is supported only if elf_x86_64_arch_bed |
2293 | is used in 64-bit mode. */ | |
2294 | if (ABI_64_P (abfd) | |
d258b828 IZ |
2295 | && info->bndplt |
2296 | && (get_elf_x86_64_backend_data (abfd) | |
2297 | == &elf_x86_64_arch_bed)) | |
0ff2b86e | 2298 | { |
bc696fd5 | 2299 | elf_x86_64_hash_entry (h)->has_bnd_reloc = 1; |
0ff2b86e L |
2300 | |
2301 | /* Create the second PLT for Intel MPX support. */ | |
2302 | if (htab->plt_bnd == NULL) | |
2303 | { | |
2304 | unsigned int plt_bnd_align; | |
2305 | const struct elf_backend_data *bed; | |
2306 | ||
2307 | bed = get_elf_backend_data (info->output_bfd); | |
6db50b4c L |
2308 | BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry) == 8 |
2309 | && (sizeof (elf_x86_64_bnd_plt2_entry) | |
2310 | == sizeof (elf_x86_64_legacy_plt2_entry))); | |
2311 | plt_bnd_align = 3; | |
0ff2b86e L |
2312 | |
2313 | if (htab->elf.dynobj == NULL) | |
2314 | htab->elf.dynobj = abfd; | |
2315 | htab->plt_bnd | |
2316 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
2317 | ".plt.bnd", | |
2318 | (bed->dynamic_sec_flags | |
2319 | | SEC_ALLOC | |
2320 | | SEC_CODE | |
2321 | | SEC_LOAD | |
2322 | | SEC_READONLY)); | |
2323 | if (htab->plt_bnd == NULL | |
2324 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
2325 | htab->plt_bnd, | |
2326 | plt_bnd_align)) | |
afd9acee | 2327 | goto error_return; |
0ff2b86e L |
2328 | } |
2329 | } | |
2330 | ||
cbe950e9 | 2331 | case R_X86_64_32S: |
cbe950e9 | 2332 | case R_X86_64_PC64: |
cbe950e9 | 2333 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
2334 | case R_X86_64_GOTPCRELX: |
2335 | case R_X86_64_REX_GOTPCRELX: | |
cbe950e9 | 2336 | case R_X86_64_GOTPCREL64: |
9d4057ee AM |
2337 | if (htab->elf.dynobj == NULL) |
2338 | htab->elf.dynobj = abfd; | |
466ee2af L |
2339 | /* Create the ifunc sections for static executables. */ |
2340 | if (h->type == STT_GNU_IFUNC | |
2341 | && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj, | |
2342 | info)) | |
afd9acee | 2343 | goto error_return; |
cbe950e9 L |
2344 | break; |
2345 | } | |
2346 | ||
ad1e85de L |
2347 | /* It is referenced by a non-shared object. */ |
2348 | h->ref_regular = 1; | |
61315175 | 2349 | h->root.non_ir_ref = 1; |
13a2df29 L |
2350 | |
2351 | if (h->type == STT_GNU_IFUNC) | |
2352 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
2353 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 2354 | } |
70256ad8 | 2355 | |
bedfd056 | 2356 | if (! elf_x86_64_tls_transition (info, abfd, sec, contents, |
351f65ca L |
2357 | symtab_hdr, sym_hashes, |
2358 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 2359 | rel, rel_end, h, r_symndx, FALSE)) |
afd9acee | 2360 | goto error_return; |
142411ca | 2361 | |
aec6b87e | 2362 | eh = (struct elf_x86_64_link_hash_entry *) h; |
bffbf940 | 2363 | switch (r_type) |
70256ad8 | 2364 | { |
bffbf940 JJ |
2365 | case R_X86_64_TLSLD: |
2366 | htab->tls_ld_got.refcount += 1; | |
2367 | goto create_got; | |
2368 | ||
2369 | case R_X86_64_TPOFF32: | |
0e1862bb | 2370 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
338c190a L |
2371 | return elf_x86_64_need_pic (abfd, sec, h, symtab_hdr, isym, |
2372 | &x86_64_elf_howto_table[r_type]); | |
aec6b87e L |
2373 | if (eh != NULL) |
2374 | eh->has_got_reloc = 1; | |
bffbf940 | 2375 | break; |
c434dee6 | 2376 | |
bffbf940 | 2377 | case R_X86_64_GOTTPOFF: |
0e1862bb | 2378 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
2379 | info->flags |= DF_STATIC_TLS; |
2380 | /* Fall through */ | |
70256ad8 | 2381 | |
bffbf940 JJ |
2382 | case R_X86_64_GOT32: |
2383 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
2384 | case R_X86_64_GOTPCRELX: |
2385 | case R_X86_64_REX_GOTPCRELX: | |
bffbf940 | 2386 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
2387 | case R_X86_64_GOT64: |
2388 | case R_X86_64_GOTPCREL64: | |
2389 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
2390 | case R_X86_64_GOTPC32_TLSDESC: |
2391 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
2392 | /* This symbol requires a global offset table entry. */ |
2393 | { | |
2394 | int tls_type, old_tls_type; | |
2395 | ||
2396 | switch (r_type) | |
2397 | { | |
2398 | default: tls_type = GOT_NORMAL; break; | |
2399 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
2400 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
2401 | case R_X86_64_GOTPC32_TLSDESC: |
2402 | case R_X86_64_TLSDESC_CALL: | |
2403 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
2404 | } |
2405 | ||
2406 | if (h != NULL) | |
2407 | { | |
2408 | h->got.refcount += 1; | |
aec6b87e | 2409 | old_tls_type = eh->tls_type; |
bffbf940 JJ |
2410 | } |
2411 | else | |
2412 | { | |
2413 | bfd_signed_vma *local_got_refcounts; | |
2414 | ||
2415 | /* This is a global offset table entry for a local symbol. */ | |
2416 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2417 | if (local_got_refcounts == NULL) | |
2418 | { | |
2419 | bfd_size_type size; | |
2420 | ||
2421 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
2422 | size *= sizeof (bfd_signed_vma) |
2423 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
2424 | local_got_refcounts = ((bfd_signed_vma *) |
2425 | bfd_zalloc (abfd, size)); | |
2426 | if (local_got_refcounts == NULL) | |
afd9acee | 2427 | goto error_return; |
bffbf940 | 2428 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
351f65ca | 2429 | elf_x86_64_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 2430 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
351f65ca | 2431 | elf_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 2432 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
2433 | } |
2434 | local_got_refcounts[r_symndx] += 1; | |
2435 | old_tls_type | |
351f65ca | 2436 | = elf_x86_64_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
2437 | } |
2438 | ||
2439 | /* If a TLS symbol is accessed using IE at least once, | |
2440 | there is no point to use dynamic model for it. */ | |
2441 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
2442 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
2443 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 2444 | { |
67a4f2b7 | 2445 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 2446 | tls_type = old_tls_type; |
67a4f2b7 AO |
2447 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2448 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2449 | tls_type |= old_tls_type; | |
bffbf940 JJ |
2450 | else |
2451 | { | |
09a24cbf | 2452 | if (h) |
4c544807 L |
2453 | name = h->root.root.string; |
2454 | else | |
2455 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
2456 | isym, NULL); | |
bffbf940 | 2457 | (*_bfd_error_handler) |
1f7a4e42 | 2458 | (_("%B: '%s' accessed both as normal and thread local symbol"), |
4c544807 | 2459 | abfd, name); |
68c4a57e | 2460 | bfd_set_error (bfd_error_bad_value); |
afd9acee | 2461 | goto error_return; |
bffbf940 JJ |
2462 | } |
2463 | } | |
2464 | ||
2465 | if (old_tls_type != tls_type) | |
2466 | { | |
aec6b87e L |
2467 | if (eh != NULL) |
2468 | eh->tls_type = tls_type; | |
bffbf940 | 2469 | else |
351f65ca | 2470 | elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
2471 | } |
2472 | } | |
c434dee6 AJ |
2473 | /* Fall through */ |
2474 | ||
d6ab8113 JB |
2475 | case R_X86_64_GOTOFF64: |
2476 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2477 | case R_X86_64_GOTPC64: |
bffbf940 | 2478 | create_got: |
aec6b87e L |
2479 | if (eh != NULL) |
2480 | eh->has_got_reloc = 1; | |
6de2ae4a | 2481 | if (htab->elf.sgot == NULL) |
c434dee6 AJ |
2482 | { |
2483 | if (htab->elf.dynobj == NULL) | |
2484 | htab->elf.dynobj = abfd; | |
6de2ae4a L |
2485 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, |
2486 | info)) | |
afd9acee | 2487 | goto error_return; |
c434dee6 | 2488 | } |
70256ad8 AJ |
2489 | break; |
2490 | ||
2491 | case R_X86_64_PLT32: | |
c3320543 | 2492 | case R_X86_64_PLT32_BND: |
70256ad8 | 2493 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
2494 | actually build the entry in adjust_dynamic_symbol, |
2495 | because this might be a case of linking PIC code which is | |
2496 | never referenced by a dynamic object, in which case we | |
2497 | don't need to generate a procedure linkage table entry | |
2498 | after all. */ | |
70256ad8 AJ |
2499 | |
2500 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 2501 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
2502 | if (h == NULL) |
2503 | continue; | |
2504 | ||
aec6b87e | 2505 | eh->has_got_reloc = 1; |
f5385ebf | 2506 | h->needs_plt = 1; |
51b64d56 | 2507 | h->plt.refcount += 1; |
70256ad8 AJ |
2508 | break; |
2509 | ||
7b81dfbb AJ |
2510 | case R_X86_64_PLTOFF64: |
2511 | /* This tries to form the 'address' of a function relative | |
2512 | to GOT. For global symbols we need a PLT entry. */ | |
2513 | if (h != NULL) | |
2514 | { | |
2515 | h->needs_plt = 1; | |
2516 | h->plt.refcount += 1; | |
2517 | } | |
2518 | goto create_got; | |
2519 | ||
6a3e1bae L |
2520 | case R_X86_64_SIZE32: |
2521 | case R_X86_64_SIZE64: | |
06a6a421 | 2522 | size_reloc = TRUE; |
6a3e1bae L |
2523 | goto do_size; |
2524 | ||
248775ba L |
2525 | case R_X86_64_32: |
2526 | if (!ABI_64_P (abfd)) | |
2527 | goto pointer; | |
cc78d0af AJ |
2528 | case R_X86_64_8: |
2529 | case R_X86_64_16: | |
70256ad8 | 2530 | case R_X86_64_32S: |
338c190a L |
2531 | /* Check relocation overflow as these relocs may lead to |
2532 | run-time relocation overflow. Don't error out for | |
1b71fb54 | 2533 | sections we don't care about, such as debug sections or |
338c190a | 2534 | when relocation overflow check is disabled. */ |
4c10bbaa | 2535 | if (!info->no_reloc_overflow_check |
338c190a L |
2536 | && (bfd_link_pic (info) |
2537 | || (bfd_link_executable (info) | |
2538 | && h != NULL | |
2539 | && !h->def_regular | |
2540 | && h->def_dynamic | |
081b1afe | 2541 | && (sec->flags & SEC_READONLY) == 0))) |
338c190a L |
2542 | return elf_x86_64_need_pic (abfd, sec, h, symtab_hdr, isym, |
2543 | &x86_64_elf_howto_table[r_type]); | |
1b71fb54 AJ |
2544 | /* Fall through. */ |
2545 | ||
c434dee6 AJ |
2546 | case R_X86_64_PC8: |
2547 | case R_X86_64_PC16: | |
70256ad8 | 2548 | case R_X86_64_PC32: |
c3320543 | 2549 | case R_X86_64_PC32_BND: |
d6ab8113 | 2550 | case R_X86_64_PC64: |
1b71fb54 | 2551 | case R_X86_64_64: |
248775ba | 2552 | pointer: |
aec6b87e L |
2553 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
2554 | eh->has_non_got_reloc = 1; | |
bf52d7c7 L |
2555 | /* We are called after all symbols have been resolved. Only |
2556 | relocation against STT_GNU_IFUNC symbol must go through | |
2557 | PLT. */ | |
d1ed1c7d L |
2558 | if (h != NULL |
2559 | && (bfd_link_executable (info) | |
bf52d7c7 | 2560 | || h->type == STT_GNU_IFUNC)) |
c434dee6 AJ |
2561 | { |
2562 | /* If this reloc is in a read-only section, we might | |
2563 | need a copy reloc. We can't check reliably at this | |
2564 | stage whether the section is read-only, as input | |
2565 | sections have not yet been mapped to output sections. | |
2566 | Tentatively set the flag for now, and correct in | |
2567 | adjust_dynamic_symbol. */ | |
f5385ebf | 2568 | h->non_got_ref = 1; |
c434dee6 | 2569 | |
233cc9c1 L |
2570 | /* We may need a .plt entry if the symbol is a function |
2571 | defined in a shared lib or is a STT_GNU_IFUNC function | |
2572 | referenced from the code or read-only section. */ | |
2573 | if (!h->def_regular | |
2574 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
2575 | h->plt.refcount += 1; | |
2576 | ||
5db4f0d3 L |
2577 | if (r_type == R_X86_64_PC32) |
2578 | { | |
2579 | /* Since something like ".long foo - ." may be used | |
2580 | as pointer, make sure that PLT is used if foo is | |
2581 | a function defined in a shared library. */ | |
2582 | if ((sec->flags & SEC_CODE) == 0) | |
2583 | h->pointer_equality_needed = 1; | |
2584 | } | |
2585 | else if (r_type != R_X86_64_PC32_BND | |
2586 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
2587 | { |
2588 | h->pointer_equality_needed = 1; | |
2589 | /* At run-time, R_X86_64_64 can be resolved for both | |
2590 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
2591 | can only be resolved for x32. */ | |
2592 | if ((sec->flags & SEC_READONLY) == 0 | |
2593 | && (r_type == R_X86_64_64 | |
2594 | || (!ABI_64_P (abfd) | |
2595 | && (r_type == R_X86_64_32 | |
2596 | || r_type == R_X86_64_32S)))) | |
aec6b87e | 2597 | eh->func_pointer_refcount += 1; |
04ebc307 | 2598 | } |
c434dee6 | 2599 | } |
70256ad8 | 2600 | |
06a6a421 | 2601 | size_reloc = FALSE; |
6a3e1bae | 2602 | do_size: |
70256ad8 AJ |
2603 | /* If we are creating a shared library, and this is a reloc |
2604 | against a global symbol, or a non PC relative reloc | |
2605 | against a local symbol, then we need to copy the reloc | |
2606 | into the shared library. However, if we are linking with | |
2607 | -Bsymbolic, we do not need to copy a reloc against a | |
2608 | global symbol which is defined in an object we are | |
407443a3 | 2609 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
2610 | this point we have not seen all the input files, so it is |
2611 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
2612 | later (it is never cleared). In case of a weak definition, |
2613 | DEF_REGULAR may be cleared later by a strong definition in | |
2614 | a shared library. We account for that possibility below by | |
2615 | storing information in the relocs_copied field of the hash | |
2616 | table entry. A similar situation occurs when creating | |
2617 | shared libraries and symbol visibility changes render the | |
31c0ebfe | 2618 | symbol local. |
c434dee6 AJ |
2619 | |
2620 | If on the other hand, we are creating an executable, we | |
2621 | may need to keep relocations for symbols satisfied by a | |
2622 | dynamic library if we manage to avoid copy relocs for the | |
233cc9c1 L |
2623 | symbol. |
2624 | ||
2625 | Generate dynamic pointer relocation against STT_GNU_IFUNC | |
2626 | symbol in the non-code section. */ | |
081b1afe L |
2627 | if ((bfd_link_pic (info) |
2628 | && (! IS_X86_64_PCREL_TYPE (r_type) | |
2629 | || (h != NULL | |
2630 | && (! (bfd_link_pie (info) | |
2631 | || SYMBOLIC_BIND (info, h)) | |
2632 | || h->root.type == bfd_link_hash_defweak | |
2633 | || !h->def_regular)))) | |
233cc9c1 L |
2634 | || (h != NULL |
2635 | && h->type == STT_GNU_IFUNC | |
2636 | && r_type == htab->pointer_r_type | |
2637 | && (sec->flags & SEC_CODE) == 0) | |
081b1afe L |
2638 | || (ELIMINATE_COPY_RELOCS |
2639 | && !bfd_link_pic (info) | |
2640 | && h != NULL | |
2641 | && (h->root.type == bfd_link_hash_defweak | |
2642 | || !h->def_regular))) | |
70256ad8 | 2643 | { |
e03a8ed8 L |
2644 | struct elf_dyn_relocs *p; |
2645 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2646 | |
2647 | /* We must copy these reloc types into the output file. | |
2648 | Create a reloc section in dynobj and make room for | |
2649 | this reloc. */ | |
70256ad8 AJ |
2650 | if (sreloc == NULL) |
2651 | { | |
c434dee6 AJ |
2652 | if (htab->elf.dynobj == NULL) |
2653 | htab->elf.dynobj = abfd; | |
2654 | ||
83bac4b0 | 2655 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
2656 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
2657 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 2658 | |
70256ad8 | 2659 | if (sreloc == NULL) |
afd9acee | 2660 | goto error_return; |
70256ad8 AJ |
2661 | } |
2662 | ||
c434dee6 AJ |
2663 | /* If this is a global symbol, we count the number of |
2664 | relocations we need for this symbol. */ | |
2665 | if (h != NULL) | |
aec6b87e | 2666 | head = &eh->dyn_relocs; |
c434dee6 AJ |
2667 | else |
2668 | { | |
2669 | /* Track dynamic relocs needed for local syms too. | |
2670 | We really need local syms available to do this | |
2671 | easily. Oh well. */ | |
c434dee6 | 2672 | asection *s; |
87d72d41 | 2673 | void **vpp; |
87d72d41 AM |
2674 | |
2675 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2676 | abfd, r_symndx); | |
2677 | if (isym == NULL) | |
afd9acee | 2678 | goto error_return; |
87d72d41 AM |
2679 | |
2680 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2681 | if (s == NULL) |
87d72d41 | 2682 | s = sec; |
70256ad8 | 2683 | |
e81d3500 DD |
2684 | /* Beware of type punned pointers vs strict aliasing |
2685 | rules. */ | |
2686 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2687 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2688 | } |
70256ad8 | 2689 | |
c434dee6 AJ |
2690 | p = *head; |
2691 | if (p == NULL || p->sec != sec) | |
2692 | { | |
2693 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 2694 | |
e03a8ed8 | 2695 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2696 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2697 | if (p == NULL) |
afd9acee | 2698 | goto error_return; |
c434dee6 AJ |
2699 | p->next = *head; |
2700 | *head = p; | |
2701 | p->sec = sec; | |
2702 | p->count = 0; | |
2703 | p->pc_count = 0; | |
70256ad8 | 2704 | } |
c434dee6 AJ |
2705 | |
2706 | p->count += 1; | |
06a6a421 L |
2707 | /* Count size relocation as PC-relative relocation. */ |
2708 | if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc) | |
c434dee6 | 2709 | p->pc_count += 1; |
70256ad8 AJ |
2710 | } |
2711 | break; | |
fe4770f4 AJ |
2712 | |
2713 | /* This relocation describes the C++ object vtable hierarchy. | |
2714 | Reconstruct it for later use during GC. */ | |
2715 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2716 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
afd9acee | 2717 | goto error_return; |
fe4770f4 AJ |
2718 | break; |
2719 | ||
2720 | /* This relocation describes which C++ vtable entries are actually | |
2721 | used. Record for later use during GC. */ | |
2722 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
2723 | BFD_ASSERT (h != NULL); |
2724 | if (h != NULL | |
2725 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
afd9acee | 2726 | goto error_return; |
fe4770f4 | 2727 | break; |
c434dee6 AJ |
2728 | |
2729 | default: | |
2730 | break; | |
70256ad8 | 2731 | } |
dd7e64d4 L |
2732 | |
2733 | if (use_plt_got | |
2734 | && h != NULL | |
2735 | && h->plt.refcount > 0 | |
8ded2ddc L |
2736 | && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
2737 | || h->got.refcount > 0) | |
dd7e64d4 L |
2738 | && htab->plt_got == NULL) |
2739 | { | |
2740 | /* Create the GOT procedure linkage table. */ | |
2741 | unsigned int plt_got_align; | |
2742 | const struct elf_backend_data *bed; | |
2743 | ||
2744 | bed = get_elf_backend_data (info->output_bfd); | |
2745 | BFD_ASSERT (sizeof (elf_x86_64_legacy_plt2_entry) == 8 | |
2746 | && (sizeof (elf_x86_64_bnd_plt2_entry) | |
2747 | == sizeof (elf_x86_64_legacy_plt2_entry))); | |
2748 | plt_got_align = 3; | |
2749 | ||
2750 | if (htab->elf.dynobj == NULL) | |
2751 | htab->elf.dynobj = abfd; | |
2752 | htab->plt_got | |
2753 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
2754 | ".plt.got", | |
2755 | (bed->dynamic_sec_flags | |
2756 | | SEC_ALLOC | |
2757 | | SEC_CODE | |
2758 | | SEC_LOAD | |
2759 | | SEC_READONLY)); | |
2760 | if (htab->plt_got == NULL | |
2761 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
2762 | htab->plt_got, | |
2763 | plt_got_align)) | |
afd9acee | 2764 | goto error_return; |
dd7e64d4 | 2765 | } |
c1d11331 | 2766 | |
56ceb5b5 L |
2767 | if ((r_type == R_X86_64_GOTPCREL |
2768 | || r_type == R_X86_64_GOTPCRELX | |
2769 | || r_type == R_X86_64_REX_GOTPCRELX) | |
c1d11331 | 2770 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
56ceb5b5 | 2771 | sec->need_convert_load = 1; |
70256ad8 AJ |
2772 | } |
2773 | ||
bedfd056 L |
2774 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2775 | { | |
2776 | if (!info->keep_memory) | |
2777 | free (contents); | |
2778 | else | |
2779 | { | |
2780 | /* Cache the section contents for elf_link_input_bfd. */ | |
2781 | elf_section_data (sec)->this_hdr.contents = contents; | |
2782 | } | |
2783 | } | |
2784 | ||
b34976b6 | 2785 | return TRUE; |
afd9acee L |
2786 | |
2787 | error_return: | |
bedfd056 L |
2788 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2789 | free (contents); | |
afd9acee L |
2790 | sec->check_relocs_failed = 1; |
2791 | return FALSE; | |
70256ad8 AJ |
2792 | } |
2793 | ||
2794 | /* Return the section that should be marked against GC for a given | |
407443a3 | 2795 | relocation. */ |
70256ad8 AJ |
2796 | |
2797 | static asection * | |
351f65ca L |
2798 | elf_x86_64_gc_mark_hook (asection *sec, |
2799 | struct bfd_link_info *info, | |
2800 | Elf_Internal_Rela *rel, | |
2801 | struct elf_link_hash_entry *h, | |
2802 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
2803 | { |
2804 | if (h != NULL) | |
351f65ca | 2805 | switch (ELF32_R_TYPE (rel->r_info)) |
07adf181 AM |
2806 | { |
2807 | case R_X86_64_GNU_VTINHERIT: | |
2808 | case R_X86_64_GNU_VTENTRY: | |
2809 | return NULL; | |
2810 | } | |
2811 | ||
2812 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
2813 | } |
2814 | ||
aec6b87e L |
2815 | /* Remove undefined weak symbol from the dynamic symbol table if it |
2816 | is resolved to 0. */ | |
2817 | ||
2818 | static bfd_boolean | |
2819 | elf_x86_64_fixup_symbol (struct bfd_link_info *info, | |
2820 | struct elf_link_hash_entry *h) | |
2821 | { | |
2822 | if (h->dynindx != -1 | |
2823 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, | |
e62b9723 | 2824 | elf_x86_64_hash_entry (h)->has_got_reloc, |
aec6b87e L |
2825 | elf_x86_64_hash_entry (h))) |
2826 | { | |
2827 | h->dynindx = -1; | |
2828 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
2829 | h->dynstr_index); | |
2830 | } | |
2831 | return TRUE; | |
2832 | } | |
2833 | ||
70256ad8 AJ |
2834 | /* Adjust a symbol defined by a dynamic object and referenced by a |
2835 | regular object. The current definition is in some section of the | |
2836 | dynamic object, but we're not including those sections. We have to | |
2837 | change the definition to something the rest of the link can | |
407443a3 | 2838 | understand. */ |
70256ad8 | 2839 | |
b34976b6 | 2840 | static bfd_boolean |
351f65ca L |
2841 | elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
2842 | struct elf_link_hash_entry *h) | |
70256ad8 | 2843 | { |
351f65ca | 2844 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 | 2845 | asection *s; |
5ca5bb35 L |
2846 | struct elf_x86_64_link_hash_entry *eh; |
2847 | struct elf_dyn_relocs *p; | |
70256ad8 | 2848 | |
cbe950e9 L |
2849 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2850 | if (h->type == STT_GNU_IFUNC) | |
2851 | { | |
73bcf233 L |
2852 | /* All local STT_GNU_IFUNC references must be treate as local |
2853 | calls via local PLT. */ | |
5ca5bb35 L |
2854 | if (h->ref_regular |
2855 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2856 | { | |
73bcf233 | 2857 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2858 | struct elf_dyn_relocs **pp; |
2859 | ||
2860 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2861 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2862 | { | |
2863 | pc_count += p->pc_count; | |
2864 | p->count -= p->pc_count; | |
2865 | p->pc_count = 0; | |
73bcf233 | 2866 | count += p->count; |
5ca5bb35 L |
2867 | if (p->count == 0) |
2868 | *pp = p->next; | |
2869 | else | |
2870 | pp = &p->next; | |
2871 | } | |
2872 | ||
73bcf233 | 2873 | if (pc_count || count) |
5ca5bb35 | 2874 | { |
5ca5bb35 | 2875 | h->non_got_ref = 1; |
233cc9c1 L |
2876 | if (pc_count) |
2877 | { | |
2878 | /* Increment PLT reference count only for PC-relative | |
2879 | references. */ | |
2880 | h->needs_plt = 1; | |
2881 | if (h->plt.refcount <= 0) | |
2882 | h->plt.refcount = 1; | |
2883 | else | |
2884 | h->plt.refcount += 1; | |
2885 | } | |
5ca5bb35 L |
2886 | } |
2887 | } | |
2888 | ||
cbe950e9 L |
2889 | if (h->plt.refcount <= 0) |
2890 | { | |
2891 | h->plt.offset = (bfd_vma) -1; | |
2892 | h->needs_plt = 0; | |
2893 | } | |
2894 | return TRUE; | |
2895 | } | |
2896 | ||
70256ad8 AJ |
2897 | /* If this is a function, put it in the procedure linkage table. We |
2898 | will fill in the contents of the procedure linkage table later, | |
2899 | when we know the address of the .got section. */ | |
2900 | if (h->type == STT_FUNC | |
f5385ebf | 2901 | || h->needs_plt) |
70256ad8 | 2902 | { |
c434dee6 | 2903 | if (h->plt.refcount <= 0 |
27482721 AJ |
2904 | || SYMBOL_CALLS_LOCAL (info, h) |
2905 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2906 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 2907 | { |
70256ad8 AJ |
2908 | /* This case can occur if we saw a PLT32 reloc in an input |
2909 | file, but the symbol was never referred to by a dynamic | |
2910 | object, or if all references were garbage collected. In | |
2911 | such a case, we don't actually need to build a procedure | |
2912 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 2913 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2914 | h->needs_plt = 0; |
70256ad8 AJ |
2915 | } |
2916 | ||
b34976b6 | 2917 | return TRUE; |
70256ad8 | 2918 | } |
bbd7ec4a | 2919 | else |
c434dee6 AJ |
2920 | /* It's possible that we incorrectly decided a .plt reloc was |
2921 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
2922 | check_relocs. We can't decide accurately between function and | |
2923 | non-function syms in check-relocs; Objects loaded later in | |
2924 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2925 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
2926 | |
2927 | /* If this is a weak symbol, and there is a real definition, the | |
2928 | processor independent code will have arranged for us to see the | |
407443a3 | 2929 | real definition first, and we can just use the same value. */ |
f6e332e6 | 2930 | if (h->u.weakdef != NULL) |
70256ad8 | 2931 | { |
f6e332e6 AM |
2932 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2933 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2934 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2935 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 2936 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
bc696fd5 L |
2937 | { |
2938 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2939 | h->non_got_ref = h->u.weakdef->non_got_ref; | |
2940 | eh->needs_copy = h->u.weakdef->needs_copy; | |
2941 | } | |
b34976b6 | 2942 | return TRUE; |
70256ad8 AJ |
2943 | } |
2944 | ||
2945 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 2946 | is not a function. */ |
70256ad8 AJ |
2947 | |
2948 | /* If we are creating a shared library, we must presume that the | |
2949 | only references to the symbol are via the global offset table. | |
2950 | For such cases we need not do anything here; the relocations will | |
407443a3 | 2951 | be handled correctly by relocate_section. */ |
0e1862bb | 2952 | if (!bfd_link_executable (info)) |
b34976b6 | 2953 | return TRUE; |
70256ad8 AJ |
2954 | |
2955 | /* If there are no references to this symbol that do not use the | |
2956 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 2957 | if (!h->non_got_ref) |
b34976b6 | 2958 | return TRUE; |
70256ad8 | 2959 | |
c434dee6 AJ |
2960 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2961 | if (info->nocopyreloc) | |
2962 | { | |
f5385ebf | 2963 | h->non_got_ref = 0; |
b34976b6 | 2964 | return TRUE; |
c434dee6 AJ |
2965 | } |
2966 | ||
31c0ebfe | 2967 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 2968 | { |
351f65ca | 2969 | eh = (struct elf_x86_64_link_hash_entry *) h; |
d40d037c AJ |
2970 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2971 | { | |
2972 | s = p->sec->output_section; | |
2973 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2974 | break; | |
2975 | } | |
2976 | ||
2977 | /* If we didn't find any dynamic relocs in read-only sections, then | |
2978 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
2979 | if (p == NULL) | |
2980 | { | |
f5385ebf | 2981 | h->non_got_ref = 0; |
d40d037c AJ |
2982 | return TRUE; |
2983 | } | |
c434dee6 AJ |
2984 | } |
2985 | ||
70256ad8 | 2986 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 2987 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
2988 | an entry for this symbol in the .dynsym section. The dynamic |
2989 | object will contain position independent code, so all references | |
2990 | from the dynamic object to this symbol will go through the global | |
2991 | offset table. The dynamic linker will use the .dynsym entry to | |
2992 | determine the address it must put in the global offset table, so | |
2993 | both the dynamic object and the regular object will refer to the | |
2994 | same memory location for the variable. */ | |
2995 | ||
351f65ca | 2996 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2997 | if (htab == NULL) |
2998 | return FALSE; | |
70256ad8 AJ |
2999 | |
3000 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
3001 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 3002 | runtime process image. */ |
1d7e9d18 | 3003 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
70256ad8 | 3004 | { |
351f65ca L |
3005 | const struct elf_backend_data *bed; |
3006 | bed = get_elf_backend_data (info->output_bfd); | |
3007 | htab->srelbss->size += bed->s->sizeof_rela; | |
f5385ebf | 3008 | h->needs_copy = 1; |
70256ad8 AJ |
3009 | } |
3010 | ||
c434dee6 | 3011 | s = htab->sdynbss; |
70256ad8 | 3012 | |
6cabe1ea | 3013 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
70256ad8 AJ |
3014 | } |
3015 | ||
c434dee6 AJ |
3016 | /* Allocate space in .plt, .got and associated reloc sections for |
3017 | dynamic relocs. */ | |
3018 | ||
b34976b6 | 3019 | static bfd_boolean |
351f65ca | 3020 | elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
3021 | { |
3022 | struct bfd_link_info *info; | |
351f65ca L |
3023 | struct elf_x86_64_link_hash_table *htab; |
3024 | struct elf_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 3025 | struct elf_dyn_relocs *p; |
351f65ca | 3026 | const struct elf_backend_data *bed; |
eed180f8 | 3027 | unsigned int plt_entry_size; |
aec6b87e | 3028 | bfd_boolean resolved_to_zero; |
c434dee6 | 3029 | |
e92d460e | 3030 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 3031 | return TRUE; |
c434dee6 | 3032 | |
351f65ca | 3033 | eh = (struct elf_x86_64_link_hash_entry *) h; |
e92d460e | 3034 | |
c434dee6 | 3035 | info = (struct bfd_link_info *) inf; |
351f65ca | 3036 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3037 | if (htab == NULL) |
3038 | return FALSE; | |
351f65ca | 3039 | bed = get_elf_backend_data (info->output_bfd); |
eed180f8 | 3040 | plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
c434dee6 | 3041 | |
e62b9723 L |
3042 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
3043 | eh->has_got_reloc, | |
3044 | eh); | |
aec6b87e | 3045 | |
dd7e64d4 L |
3046 | /* We can't use the GOT PLT if pointer equality is needed since |
3047 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
3048 | linker won't update the GOT slot. We will get into an infinite | |
3049 | loop at run-time. */ | |
3050 | if (htab->plt_got != NULL | |
3051 | && h->type != STT_GNU_IFUNC | |
3052 | && !h->pointer_equality_needed | |
3053 | && h->plt.refcount > 0 | |
3054 | && h->got.refcount > 0) | |
3055 | { | |
3056 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
3057 | reloctions. */ | |
3058 | h->plt.offset = (bfd_vma) -1; | |
3059 | ||
3060 | /* Use the GOT PLT. */ | |
3061 | eh->plt_got.refcount = 1; | |
3062 | } | |
3063 | ||
04ebc307 L |
3064 | /* Clear the reference count of function pointer relocations if |
3065 | symbol isn't a normal function. */ | |
3066 | if (h->type != STT_FUNC) | |
3067 | eh->func_pointer_refcount = 0; | |
3068 | ||
cbe950e9 L |
3069 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
3070 | here if it is defined and referenced in a non-shared object. */ | |
3071 | if (h->type == STT_GNU_IFUNC | |
3072 | && h->def_regular) | |
0ff2b86e L |
3073 | { |
3074 | if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, | |
3075 | &eh->dyn_relocs, | |
2df3368d | 3076 | &htab->readonly_dynrelocs_against_ifunc, |
0ff2b86e L |
3077 | plt_entry_size, |
3078 | plt_entry_size, | |
233cc9c1 | 3079 | GOT_ENTRY_SIZE, TRUE)) |
0ff2b86e L |
3080 | { |
3081 | asection *s = htab->plt_bnd; | |
3082 | if (h->plt.offset != (bfd_vma) -1 && s != NULL) | |
3083 | { | |
3084 | /* Use the .plt.bnd section if it is created. */ | |
3085 | eh->plt_bnd.offset = s->size; | |
3086 | ||
3087 | /* Make room for this entry in the .plt.bnd section. */ | |
3088 | s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
3089 | } | |
3090 | ||
3091 | return TRUE; | |
3092 | } | |
3093 | else | |
3094 | return FALSE; | |
3095 | } | |
04ebc307 L |
3096 | /* Don't create the PLT entry if there are only function pointer |
3097 | relocations which can be resolved at run-time. */ | |
cbe950e9 | 3098 | else if (htab->elf.dynamic_sections_created |
04ebc307 L |
3099 | && (h->plt.refcount > eh->func_pointer_refcount |
3100 | || eh->plt_got.refcount > 0)) | |
c434dee6 | 3101 | { |
25070364 L |
3102 | bfd_boolean use_plt_got; |
3103 | ||
04ebc307 L |
3104 | /* Clear the reference count of function pointer relocations |
3105 | if PLT is used. */ | |
3106 | eh->func_pointer_refcount = 0; | |
3107 | ||
8ded2ddc | 3108 | if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
25070364 L |
3109 | { |
3110 | /* Don't use the regular PLT for DF_BIND_NOW. */ | |
3111 | h->plt.offset = (bfd_vma) -1; | |
3112 | ||
3113 | /* Use the GOT PLT. */ | |
3114 | h->got.refcount = 1; | |
3115 | eh->plt_got.refcount = 1; | |
3116 | } | |
3117 | ||
3118 | use_plt_got = eh->plt_got.refcount > 0; | |
dd7e64d4 | 3119 | |
c434dee6 AJ |
3120 | /* Make sure this symbol is output as a dynamic symbol. |
3121 | Undefined weak syms won't yet be marked as dynamic. */ | |
3122 | if (h->dynindx == -1 | |
aec6b87e L |
3123 | && !h->forced_local |
3124 | && !resolved_to_zero) | |
c434dee6 | 3125 | { |
c152c796 | 3126 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 3127 | return FALSE; |
c434dee6 AJ |
3128 | } |
3129 | ||
0e1862bb | 3130 | if (bfd_link_pic (info) |
27482721 | 3131 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
c434dee6 | 3132 | { |
6de2ae4a | 3133 | asection *s = htab->elf.splt; |
0ff2b86e | 3134 | asection *bnd_s = htab->plt_bnd; |
dd7e64d4 | 3135 | asection *got_s = htab->plt_got; |
c434dee6 | 3136 | |
7c1e8d3e L |
3137 | /* If this is the first .plt entry, make room for the special |
3138 | first entry. The .plt section is used by prelink to undo | |
3139 | prelinking for dynamic relocations. */ | |
3140 | if (s->size == 0) | |
3141 | s->size = plt_entry_size; | |
3142 | ||
dd7e64d4 L |
3143 | if (use_plt_got) |
3144 | eh->plt_got.offset = got_s->size; | |
3145 | else | |
3146 | { | |
3147 | h->plt.offset = s->size; | |
3148 | if (bnd_s) | |
3149 | eh->plt_bnd.offset = bnd_s->size; | |
3150 | } | |
c434dee6 AJ |
3151 | |
3152 | /* If this symbol is not defined in a regular file, and we are | |
3153 | not generating a shared library, then set the symbol to this | |
3154 | location in the .plt. This is required to make function | |
3155 | pointers compare as equal between the normal executable and | |
3156 | the shared library. */ | |
0e1862bb | 3157 | if (! bfd_link_pic (info) |
f5385ebf | 3158 | && !h->def_regular) |
c434dee6 | 3159 | { |
dd7e64d4 | 3160 | if (use_plt_got) |
0ff2b86e | 3161 | { |
dd7e64d4 L |
3162 | /* We need to make a call to the entry of the GOT PLT |
3163 | instead of regular PLT entry. */ | |
3164 | h->root.u.def.section = got_s; | |
3165 | h->root.u.def.value = eh->plt_got.offset; | |
0ff2b86e L |
3166 | } |
3167 | else | |
3168 | { | |
dd7e64d4 L |
3169 | if (bnd_s) |
3170 | { | |
3171 | /* We need to make a call to the entry of the second | |
3172 | PLT instead of regular PLT entry. */ | |
3173 | h->root.u.def.section = bnd_s; | |
3174 | h->root.u.def.value = eh->plt_bnd.offset; | |
3175 | } | |
3176 | else | |
3177 | { | |
3178 | h->root.u.def.section = s; | |
3179 | h->root.u.def.value = h->plt.offset; | |
3180 | } | |
0ff2b86e | 3181 | } |
c434dee6 AJ |
3182 | } |
3183 | ||
3184 | /* Make room for this entry. */ | |
dd7e64d4 L |
3185 | if (use_plt_got) |
3186 | got_s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
3187 | else | |
3188 | { | |
3189 | s->size += plt_entry_size; | |
3190 | if (bnd_s) | |
3191 | bnd_s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
c434dee6 | 3192 | |
dd7e64d4 L |
3193 | /* We also need to make an entry in the .got.plt section, |
3194 | which will be placed in the .got section by the linker | |
3195 | script. */ | |
3196 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; | |
c434dee6 | 3197 | |
aec6b87e L |
3198 | /* There should be no PLT relocation against resolved |
3199 | undefined weak symbol in executable. */ | |
3200 | if (!resolved_to_zero) | |
3201 | { | |
3202 | /* We also need to make an entry in the .rela.plt | |
3203 | section. */ | |
3204 | htab->elf.srelplt->size += bed->s->sizeof_rela; | |
3205 | htab->elf.srelplt->reloc_count++; | |
3206 | } | |
dd7e64d4 | 3207 | } |
c434dee6 AJ |
3208 | } |
3209 | else | |
3210 | { | |
13f42277 | 3211 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 3212 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 3213 | h->needs_plt = 0; |
c434dee6 AJ |
3214 | } |
3215 | } | |
3216 | else | |
3217 | { | |
13f42277 | 3218 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 3219 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 3220 | h->needs_plt = 0; |
c434dee6 AJ |
3221 | } |
3222 | ||
67a4f2b7 AO |
3223 | eh->tlsdesc_got = (bfd_vma) -1; |
3224 | ||
bffbf940 JJ |
3225 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
3226 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
3227 | if (h->got.refcount > 0 | |
0e1862bb | 3228 | && bfd_link_executable (info) |
bffbf940 | 3229 | && h->dynindx == -1 |
351f65ca | 3230 | && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) |
d8045f23 NC |
3231 | { |
3232 | h->got.offset = (bfd_vma) -1; | |
3233 | } | |
bffbf940 | 3234 | else if (h->got.refcount > 0) |
c434dee6 AJ |
3235 | { |
3236 | asection *s; | |
b34976b6 | 3237 | bfd_boolean dyn; |
351f65ca | 3238 | int tls_type = elf_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
3239 | |
3240 | /* Make sure this symbol is output as a dynamic symbol. | |
3241 | Undefined weak syms won't yet be marked as dynamic. */ | |
3242 | if (h->dynindx == -1 | |
aec6b87e L |
3243 | && !h->forced_local |
3244 | && !resolved_to_zero) | |
c434dee6 | 3245 | { |
c152c796 | 3246 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 3247 | return FALSE; |
c434dee6 AJ |
3248 | } |
3249 | ||
67a4f2b7 AO |
3250 | if (GOT_TLS_GDESC_P (tls_type)) |
3251 | { | |
6de2ae4a | 3252 | eh->tlsdesc_got = htab->elf.sgotplt->size |
351f65ca | 3253 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 3254 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
3255 | h->got.offset = (bfd_vma) -2; |
3256 | } | |
3257 | if (! GOT_TLS_GDESC_P (tls_type) | |
3258 | || GOT_TLS_GD_P (tls_type)) | |
3259 | { | |
6de2ae4a | 3260 | s = htab->elf.sgot; |
67a4f2b7 AO |
3261 | h->got.offset = s->size; |
3262 | s->size += GOT_ENTRY_SIZE; | |
3263 | if (GOT_TLS_GD_P (tls_type)) | |
3264 | s->size += GOT_ENTRY_SIZE; | |
3265 | } | |
c434dee6 | 3266 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 | 3267 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
aec6b87e L |
3268 | and two if global. R_X86_64_GOTTPOFF needs one dynamic |
3269 | relocation. No dynamic relocation against resolved undefined | |
3270 | weak symbol in executable. */ | |
67a4f2b7 | 3271 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 3272 | || tls_type == GOT_TLS_IE) |
351f65ca | 3273 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 | 3274 | else if (GOT_TLS_GD_P (tls_type)) |
351f65ca | 3275 | htab->elf.srelgot->size += 2 * bed->s->sizeof_rela; |
67a4f2b7 | 3276 | else if (! GOT_TLS_GDESC_P (tls_type) |
aec6b87e L |
3277 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
3278 | && !resolved_to_zero) | |
67a4f2b7 | 3279 | || h->root.type != bfd_link_hash_undefweak) |
0e1862bb | 3280 | && (bfd_link_pic (info) |
27482721 | 3281 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
351f65ca | 3282 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
3283 | if (GOT_TLS_GDESC_P (tls_type)) |
3284 | { | |
351f65ca | 3285 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
3286 | htab->tlsdesc_plt = (bfd_vma) -1; |
3287 | } | |
c434dee6 AJ |
3288 | } |
3289 | else | |
3290 | h->got.offset = (bfd_vma) -1; | |
3291 | ||
c434dee6 | 3292 | if (eh->dyn_relocs == NULL) |
b34976b6 | 3293 | return TRUE; |
c434dee6 AJ |
3294 | |
3295 | /* In the shared -Bsymbolic case, discard space allocated for | |
3296 | dynamic pc-relative relocs against symbols which turn out to be | |
3297 | defined in regular objects. For the normal shared case, discard | |
3298 | space for pc-relative relocs that have become local due to symbol | |
3299 | visibility changes. */ | |
3300 | ||
0e1862bb | 3301 | if (bfd_link_pic (info)) |
c434dee6 | 3302 | { |
27482721 AJ |
3303 | /* Relocs that use pc_count are those that appear on a call |
3304 | insn, or certain REL relocs that can generated via assembly. | |
3305 | We want calls to protected symbols to resolve directly to the | |
3306 | function rather than going via the plt. If people want | |
3307 | function pointer comparisons to work as expected then they | |
3308 | should avoid writing weird assembly. */ | |
3309 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 3310 | { |
e03a8ed8 | 3311 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
3312 | |
3313 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
3314 | { | |
c3ce498c L |
3315 | p->count -= p->pc_count; |
3316 | p->pc_count = 0; | |
c434dee6 AJ |
3317 | if (p->count == 0) |
3318 | *pp = p->next; | |
3319 | else | |
3320 | pp = &p->next; | |
3321 | } | |
3322 | } | |
4e795f50 AM |
3323 | |
3324 | /* Also discard relocs on undefined weak syms with non-default | |
aec6b87e | 3325 | visibility or in PIE. */ |
31c0ebfe | 3326 | if (eh->dyn_relocs != NULL) |
22d606e9 | 3327 | { |
31c0ebfe L |
3328 | if (h->root.type == bfd_link_hash_undefweak) |
3329 | { | |
aec6b87e L |
3330 | /* Undefined weak symbol is never bound locally in shared |
3331 | library. */ | |
3332 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
3333 | || resolved_to_zero) | |
31c0ebfe | 3334 | eh->dyn_relocs = NULL; |
31c0ebfe L |
3335 | else if (h->dynindx == -1 |
3336 | && ! h->forced_local | |
3337 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
3338 | return FALSE; | |
3339 | } | |
9d1d54d5 L |
3340 | /* For PIE, discard space for pc-relative relocs against |
3341 | symbols which turn out to need copy relocs. */ | |
0e1862bb | 3342 | else if (bfd_link_executable (info) |
bc696fd5 | 3343 | && (h->needs_copy || eh->needs_copy) |
31c0ebfe L |
3344 | && h->def_dynamic |
3345 | && !h->def_regular) | |
9d1d54d5 L |
3346 | { |
3347 | struct elf_dyn_relocs **pp; | |
3348 | ||
3349 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
3350 | { | |
3351 | if (p->pc_count != 0) | |
3352 | *pp = p->next; | |
3353 | else | |
3354 | pp = &p->next; | |
3355 | } | |
3356 | } | |
22d606e9 | 3357 | } |
d8045f23 | 3358 | } |
d40d037c | 3359 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
3360 | { |
3361 | /* For the non-shared case, discard space for relocs against | |
3362 | symbols which turn out to need copy relocs or are not | |
04ebc307 L |
3363 | dynamic. Keep dynamic relocations for run-time function |
3364 | pointer initialization. */ | |
c434dee6 | 3365 | |
aec6b87e L |
3366 | if ((!h->non_got_ref |
3367 | || eh->func_pointer_refcount > 0 | |
3368 | || (h->root.type == bfd_link_hash_undefweak | |
3369 | && !resolved_to_zero)) | |
f5385ebf AM |
3370 | && ((h->def_dynamic |
3371 | && !h->def_regular) | |
c434dee6 AJ |
3372 | || (htab->elf.dynamic_sections_created |
3373 | && (h->root.type == bfd_link_hash_undefweak | |
3374 | || h->root.type == bfd_link_hash_undefined)))) | |
3375 | { | |
3376 | /* Make sure this symbol is output as a dynamic symbol. | |
3377 | Undefined weak syms won't yet be marked as dynamic. */ | |
3378 | if (h->dynindx == -1 | |
d8045f23 | 3379 | && ! h->forced_local |
aec6b87e | 3380 | && ! resolved_to_zero |
d8045f23 NC |
3381 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
3382 | return FALSE; | |
c434dee6 AJ |
3383 | |
3384 | /* If that succeeded, we know we'll be keeping all the | |
3385 | relocs. */ | |
3386 | if (h->dynindx != -1) | |
3387 | goto keep; | |
3388 | } | |
3389 | ||
3390 | eh->dyn_relocs = NULL; | |
04ebc307 | 3391 | eh->func_pointer_refcount = 0; |
c434dee6 AJ |
3392 | |
3393 | keep: ; | |
3394 | } | |
3395 | ||
3396 | /* Finally, allocate space. */ | |
3397 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
3398 | { | |
e7c33416 NC |
3399 | asection * sreloc; |
3400 | ||
cbe950e9 | 3401 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
3402 | |
3403 | BFD_ASSERT (sreloc != NULL); | |
3404 | ||
351f65ca | 3405 | sreloc->size += p->count * bed->s->sizeof_rela; |
c434dee6 AJ |
3406 | } |
3407 | ||
b34976b6 | 3408 | return TRUE; |
c434dee6 AJ |
3409 | } |
3410 | ||
c25bc9fc L |
3411 | /* Allocate space in .plt, .got and associated reloc sections for |
3412 | local dynamic relocs. */ | |
3413 | ||
3414 | static bfd_boolean | |
351f65ca | 3415 | elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf) |
c25bc9fc L |
3416 | { |
3417 | struct elf_link_hash_entry *h | |
3418 | = (struct elf_link_hash_entry *) *slot; | |
3419 | ||
3420 | if (h->type != STT_GNU_IFUNC | |
3421 | || !h->def_regular | |
3422 | || !h->ref_regular | |
3423 | || !h->forced_local | |
3424 | || h->root.type != bfd_link_hash_defined) | |
3425 | abort (); | |
3426 | ||
351f65ca | 3427 | return elf_x86_64_allocate_dynrelocs (h, inf); |
c25bc9fc L |
3428 | } |
3429 | ||
c434dee6 AJ |
3430 | /* Find any dynamic relocs that apply to read-only sections. */ |
3431 | ||
b34976b6 | 3432 | static bfd_boolean |
351f65ca L |
3433 | elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h, |
3434 | void * inf) | |
c434dee6 | 3435 | { |
351f65ca | 3436 | struct elf_x86_64_link_hash_entry *eh; |
e03a8ed8 | 3437 | struct elf_dyn_relocs *p; |
c434dee6 | 3438 | |
aa715242 L |
3439 | /* Skip local IFUNC symbols. */ |
3440 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
3441 | return TRUE; | |
3442 | ||
351f65ca | 3443 | eh = (struct elf_x86_64_link_hash_entry *) h; |
c434dee6 AJ |
3444 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
3445 | { | |
3446 | asection *s = p->sec->output_section; | |
3447 | ||
3448 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
3449 | { | |
3450 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
3451 | ||
3452 | info->flags |= DF_TEXTREL; | |
3453 | ||
0e1862bb | 3454 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd L |
3455 | || info->error_textrel) |
3456 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"), | |
b70321a2 L |
3457 | p->sec->owner, h->root.root.string, |
3458 | p->sec); | |
3459 | ||
c434dee6 | 3460 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 3461 | return FALSE; |
c434dee6 AJ |
3462 | } |
3463 | } | |
b34976b6 | 3464 | return TRUE; |
c434dee6 AJ |
3465 | } |
3466 | ||
c175a657 | 3467 | /* Convert load via the GOT slot to load immediate. */ |
daa67607 L |
3468 | |
3469 | static bfd_boolean | |
56ceb5b5 L |
3470 | elf_x86_64_convert_load (bfd *abfd, asection *sec, |
3471 | struct bfd_link_info *link_info) | |
daa67607 L |
3472 | { |
3473 | Elf_Internal_Shdr *symtab_hdr; | |
3474 | Elf_Internal_Rela *internal_relocs; | |
3475 | Elf_Internal_Rela *irel, *irelend; | |
3476 | bfd_byte *contents; | |
3477 | struct elf_x86_64_link_hash_table *htab; | |
c175a657 | 3478 | bfd_boolean changed; |
daa67607 L |
3479 | bfd_signed_vma *local_got_refcounts; |
3480 | ||
3481 | /* Don't even try to convert non-ELF outputs. */ | |
3482 | if (!is_elf_hash_table (link_info->hash)) | |
3483 | return FALSE; | |
3484 | ||
c1d11331 | 3485 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 3486 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
56ceb5b5 | 3487 | || sec->need_convert_load == 0 |
c8831961 | 3488 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
3489 | return TRUE; |
3490 | ||
3491 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3492 | ||
3493 | /* Load the relocations for this section. */ | |
3494 | internal_relocs = (_bfd_elf_link_read_relocs | |
3495 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
3496 | link_info->keep_memory)); | |
3497 | if (internal_relocs == NULL) | |
3498 | return FALSE; | |
3499 | ||
c175a657 | 3500 | changed = FALSE; |
daa67607 | 3501 | htab = elf_x86_64_hash_table (link_info); |
daa67607 L |
3502 | local_got_refcounts = elf_local_got_refcounts (abfd); |
3503 | ||
3504 | /* Get the section contents. */ | |
3505 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
3506 | contents = elf_section_data (sec)->this_hdr.contents; | |
3507 | else | |
3508 | { | |
3509 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
3510 | goto error_return; | |
3511 | } | |
3512 | ||
3513 | irelend = internal_relocs + sec->reloc_count; | |
3514 | for (irel = internal_relocs; irel < irelend; irel++) | |
3515 | { | |
3516 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
c175a657 | 3517 | unsigned int r_symndx; |
daa67607 | 3518 | struct elf_link_hash_entry *h; |
c175a657 | 3519 | bfd_boolean converted; |
59cab532 | 3520 | |
c175a657 L |
3521 | if (r_type != R_X86_64_GOTPCRELX |
3522 | && r_type != R_X86_64_REX_GOTPCRELX | |
3523 | && r_type != R_X86_64_GOTPCREL) | |
dfc87947 L |
3524 | continue; |
3525 | ||
c175a657 | 3526 | r_symndx = htab->r_sym (irel->r_info); |
daa67607 | 3527 | if (r_symndx < symtab_hdr->sh_info) |
c175a657 L |
3528 | h = elf_x86_64_get_local_sym_hash (htab, sec->owner, |
3529 | (const Elf_Internal_Rela *) irel, | |
3530 | FALSE); | |
59cab532 L |
3531 | else |
3532 | { | |
c175a657 | 3533 | h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info]; |
59cab532 L |
3534 | while (h->root.type == bfd_link_hash_indirect |
3535 | || h->root.type == bfd_link_hash_warning) | |
3536 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
59cab532 L |
3537 | } |
3538 | ||
c175a657 L |
3539 | /* STT_GNU_IFUNC must keep GOTPCREL relocations. */ |
3540 | if (h != NULL && h->type == STT_GNU_IFUNC) | |
3541 | continue; | |
daa67607 | 3542 | |
c175a657 L |
3543 | converted = FALSE; |
3544 | if (!elf_x86_64_convert_load_reloc (abfd, sec, contents, irel, h, | |
3545 | &converted, link_info)) | |
3546 | goto error_return; | |
56ceb5b5 | 3547 | |
c175a657 | 3548 | if (converted) |
56ceb5b5 | 3549 | { |
c175a657 L |
3550 | changed = converted; |
3551 | if (h) | |
56ceb5b5 | 3552 | { |
c175a657 L |
3553 | if (h->got.refcount > 0) |
3554 | h->got.refcount -= 1; | |
56ceb5b5 L |
3555 | } |
3556 | else | |
3557 | { | |
c175a657 L |
3558 | if (local_got_refcounts != NULL |
3559 | && local_got_refcounts[r_symndx] > 0) | |
3560 | local_got_refcounts[r_symndx] -= 1; | |
56ceb5b5 | 3561 | } |
daa67607 L |
3562 | } |
3563 | } | |
3564 | ||
3565 | if (contents != NULL | |
3566 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3567 | { | |
c175a657 | 3568 | if (!changed && !link_info->keep_memory) |
daa67607 L |
3569 | free (contents); |
3570 | else | |
3571 | { | |
3572 | /* Cache the section contents for elf_link_input_bfd. */ | |
3573 | elf_section_data (sec)->this_hdr.contents = contents; | |
3574 | } | |
3575 | } | |
3576 | ||
3577 | if (elf_section_data (sec)->relocs != internal_relocs) | |
3578 | { | |
c175a657 | 3579 | if (!changed) |
daa67607 L |
3580 | free (internal_relocs); |
3581 | else | |
3582 | elf_section_data (sec)->relocs = internal_relocs; | |
3583 | } | |
3584 | ||
3585 | return TRUE; | |
3586 | ||
3587 | error_return: | |
3588 | if (contents != NULL | |
3589 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3590 | free (contents); | |
3591 | if (internal_relocs != NULL | |
3592 | && elf_section_data (sec)->relocs != internal_relocs) | |
3593 | free (internal_relocs); | |
3594 | return FALSE; | |
3595 | } | |
3596 | ||
70256ad8 AJ |
3597 | /* Set the sizes of the dynamic sections. */ |
3598 | ||
b34976b6 | 3599 | static bfd_boolean |
351f65ca L |
3600 | elf_x86_64_size_dynamic_sections (bfd *output_bfd, |
3601 | struct bfd_link_info *info) | |
70256ad8 | 3602 | { |
351f65ca | 3603 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
3604 | bfd *dynobj; |
3605 | asection *s; | |
b34976b6 | 3606 | bfd_boolean relocs; |
c434dee6 | 3607 | bfd *ibfd; |
351f65ca | 3608 | const struct elf_backend_data *bed; |
70256ad8 | 3609 | |
351f65ca | 3610 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3611 | if (htab == NULL) |
3612 | return FALSE; | |
351f65ca | 3613 | bed = get_elf_backend_data (output_bfd); |
4dfe6ac6 | 3614 | |
c434dee6 AJ |
3615 | dynobj = htab->elf.dynobj; |
3616 | if (dynobj == NULL) | |
3617 | abort (); | |
70256ad8 | 3618 | |
c434dee6 AJ |
3619 | /* Set up .got offsets for local syms, and space for local dynamic |
3620 | relocs. */ | |
c72f2fb2 | 3621 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
70256ad8 | 3622 | { |
c434dee6 AJ |
3623 | bfd_signed_vma *local_got; |
3624 | bfd_signed_vma *end_local_got; | |
bffbf940 | 3625 | char *local_tls_type; |
67a4f2b7 | 3626 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
3627 | bfd_size_type locsymcount; |
3628 | Elf_Internal_Shdr *symtab_hdr; | |
3629 | asection *srel; | |
70256ad8 | 3630 | |
0ffa91dd | 3631 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
3632 | continue; |
3633 | ||
c434dee6 | 3634 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 3635 | { |
e03a8ed8 | 3636 | struct elf_dyn_relocs *p; |
c434dee6 | 3637 | |
56ceb5b5 | 3638 | if (!elf_x86_64_convert_load (ibfd, s, info)) |
daa67607 L |
3639 | return FALSE; |
3640 | ||
e03a8ed8 | 3641 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 3642 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
3643 | p != NULL; |
3644 | p = p->next) | |
70256ad8 | 3645 | { |
c434dee6 AJ |
3646 | if (!bfd_is_abs_section (p->sec) |
3647 | && bfd_is_abs_section (p->sec->output_section)) | |
3648 | { | |
3649 | /* Input section has been discarded, either because | |
3650 | it is a copy of a linkonce section or due to | |
3651 | linker script /DISCARD/, so we'll be discarding | |
3652 | the relocs too. */ | |
3653 | } | |
3654 | else if (p->count != 0) | |
3655 | { | |
3656 | srel = elf_section_data (p->sec)->sreloc; | |
351f65ca | 3657 | srel->size += p->count * bed->s->sizeof_rela; |
4b819e1f L |
3658 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
3659 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
3660 | { |
3661 | info->flags |= DF_TEXTREL; | |
0e1862bb | 3662 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd L |
3663 | || info->error_textrel) |
3664 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), | |
b70321a2 | 3665 | p->sec->owner, p->sec); |
b70321a2 | 3666 | } |
c434dee6 | 3667 | } |
70256ad8 AJ |
3668 | } |
3669 | } | |
c434dee6 AJ |
3670 | |
3671 | local_got = elf_local_got_refcounts (ibfd); | |
3672 | if (!local_got) | |
3673 | continue; | |
3674 | ||
0ffa91dd | 3675 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
3676 | locsymcount = symtab_hdr->sh_info; |
3677 | end_local_got = local_got + locsymcount; | |
351f65ca L |
3678 | local_tls_type = elf_x86_64_local_got_tls_type (ibfd); |
3679 | local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd); | |
6de2ae4a L |
3680 | s = htab->elf.sgot; |
3681 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
3682 | for (; local_got < end_local_got; |
3683 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 3684 | { |
67a4f2b7 | 3685 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 3686 | if (*local_got > 0) |
70256ad8 | 3687 | { |
67a4f2b7 AO |
3688 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
3689 | { | |
6de2ae4a | 3690 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
351f65ca | 3691 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 3692 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
3693 | *local_got = (bfd_vma) -2; |
3694 | } | |
3695 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3696 | || GOT_TLS_GD_P (*local_tls_type)) | |
3697 | { | |
3698 | *local_got = s->size; | |
3699 | s->size += GOT_ENTRY_SIZE; | |
3700 | if (GOT_TLS_GD_P (*local_tls_type)) | |
3701 | s->size += GOT_ENTRY_SIZE; | |
3702 | } | |
0e1862bb | 3703 | if (bfd_link_pic (info) |
67a4f2b7 | 3704 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 3705 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
3706 | { |
3707 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
3708 | { | |
6de2ae4a | 3709 | htab->elf.srelplt->size |
351f65ca | 3710 | += bed->s->sizeof_rela; |
67a4f2b7 AO |
3711 | htab->tlsdesc_plt = (bfd_vma) -1; |
3712 | } | |
3713 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3714 | || GOT_TLS_GD_P (*local_tls_type)) | |
351f65ca | 3715 | srel->size += bed->s->sizeof_rela; |
67a4f2b7 | 3716 | } |
70256ad8 AJ |
3717 | } |
3718 | else | |
c434dee6 AJ |
3719 | *local_got = (bfd_vma) -1; |
3720 | } | |
3721 | } | |
70256ad8 | 3722 | |
bffbf940 JJ |
3723 | if (htab->tls_ld_got.refcount > 0) |
3724 | { | |
3725 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
3726 | relocs. */ | |
6de2ae4a L |
3727 | htab->tls_ld_got.offset = htab->elf.sgot->size; |
3728 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; | |
351f65ca | 3729 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
bffbf940 JJ |
3730 | } |
3731 | else | |
3732 | htab->tls_ld_got.offset = -1; | |
3733 | ||
c434dee6 AJ |
3734 | /* Allocate global sym .plt and .got entries, and space for global |
3735 | sym dynamic relocs. */ | |
351f65ca | 3736 | elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs, |
eb4ff4d6 | 3737 | info); |
c434dee6 | 3738 | |
c25bc9fc L |
3739 | /* Allocate .plt and .got entries, and space for local symbols. */ |
3740 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 3741 | elf_x86_64_allocate_local_dynrelocs, |
c25bc9fc L |
3742 | info); |
3743 | ||
67a4f2b7 AO |
3744 | /* For every jump slot reserved in the sgotplt, reloc_count is |
3745 | incremented. However, when we reserve space for TLS descriptors, | |
3746 | it's not incremented, so in order to compute the space reserved | |
3747 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 L |
3748 | slot size. |
3749 | ||
3750 | PR ld/13302: We start next_irelative_index at the end of .rela.plt | |
3751 | so that R_X86_64_IRELATIVE entries come last. */ | |
6de2ae4a | 3752 | if (htab->elf.srelplt) |
e1f98742 L |
3753 | { |
3754 | htab->sgotplt_jump_table_size | |
3755 | = elf_x86_64_compute_jump_table_size (htab); | |
3756 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
3757 | } | |
3758 | else if (htab->elf.irelplt) | |
3759 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
67a4f2b7 AO |
3760 | |
3761 | if (htab->tlsdesc_plt) | |
3762 | { | |
3763 | /* If we're not using lazy TLS relocations, don't generate the | |
3764 | PLT and GOT entries they require. */ | |
3765 | if ((info->flags & DF_BIND_NOW)) | |
3766 | htab->tlsdesc_plt = 0; | |
3767 | else | |
3768 | { | |
6de2ae4a L |
3769 | htab->tlsdesc_got = htab->elf.sgot->size; |
3770 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
3771 | /* Reserve room for the initial entry. |
3772 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a | 3773 | if (htab->elf.splt->size == 0) |
eed180f8 | 3774 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
6de2ae4a | 3775 | htab->tlsdesc_plt = htab->elf.splt->size; |
eed180f8 | 3776 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
67a4f2b7 AO |
3777 | } |
3778 | } | |
3779 | ||
a7b16ceb L |
3780 | if (htab->elf.sgotplt) |
3781 | { | |
3782 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
eed180f8 | 3783 | entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
3784 | if ((htab->elf.hgot == NULL |
3785 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
3786 | && (htab->elf.sgotplt->size |
3787 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
3788 | && (htab->elf.splt == NULL |
3789 | || htab->elf.splt->size == 0) | |
3790 | && (htab->elf.sgot == NULL | |
3791 | || htab->elf.sgot->size == 0) | |
3792 | && (htab->elf.iplt == NULL | |
3793 | || htab->elf.iplt->size == 0) | |
3794 | && (htab->elf.igotplt == NULL | |
3795 | || htab->elf.igotplt->size == 0)) | |
3796 | htab->elf.sgotplt->size = 0; | |
3797 | } | |
3798 | ||
9a2a56cc AM |
3799 | if (htab->plt_eh_frame != NULL |
3800 | && htab->elf.splt != NULL | |
3801 | && htab->elf.splt->size != 0 | |
3802 | && !bfd_is_abs_section (htab->elf.splt->output_section) | |
3803 | && _bfd_elf_eh_frame_present (info)) | |
3804 | { | |
3805 | const struct elf_x86_64_backend_data *arch_data | |
f8222080 | 3806 | = get_elf_x86_64_arch_data (bed); |
9a2a56cc AM |
3807 | htab->plt_eh_frame->size = arch_data->eh_frame_plt_size; |
3808 | } | |
3809 | ||
c434dee6 AJ |
3810 | /* We now have determined the sizes of the various dynamic sections. |
3811 | Allocate memory for them. */ | |
b34976b6 | 3812 | relocs = FALSE; |
c434dee6 AJ |
3813 | for (s = dynobj->sections; s != NULL; s = s->next) |
3814 | { | |
3815 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3816 | continue; | |
3817 | ||
6de2ae4a L |
3818 | if (s == htab->elf.splt |
3819 | || s == htab->elf.sgot | |
3820 | || s == htab->elf.sgotplt | |
3821 | || s == htab->elf.iplt | |
3822 | || s == htab->elf.igotplt | |
0ff2b86e | 3823 | || s == htab->plt_bnd |
dd7e64d4 | 3824 | || s == htab->plt_got |
9a2a56cc | 3825 | || s == htab->plt_eh_frame |
75ff4589 | 3826 | || s == htab->sdynbss) |
c434dee6 AJ |
3827 | { |
3828 | /* Strip this section if we don't need it; see the | |
3829 | comment below. */ | |
3830 | } | |
0112cd26 | 3831 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 3832 | { |
6de2ae4a | 3833 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 3834 | relocs = TRUE; |
c434dee6 AJ |
3835 | |
3836 | /* We use the reloc_count field as a counter if we need | |
3837 | to copy relocs into the output file. */ | |
6de2ae4a | 3838 | if (s != htab->elf.srelplt) |
67a4f2b7 | 3839 | s->reloc_count = 0; |
70256ad8 | 3840 | } |
c434dee6 | 3841 | else |
70256ad8 AJ |
3842 | { |
3843 | /* It's not one of our sections, so don't allocate space. */ | |
3844 | continue; | |
3845 | } | |
3846 | ||
eea6121a | 3847 | if (s->size == 0) |
70256ad8 | 3848 | { |
c434dee6 AJ |
3849 | /* If we don't need this section, strip it from the |
3850 | output file. This is mostly to handle .rela.bss and | |
3851 | .rela.plt. We must create both sections in | |
3852 | create_dynamic_sections, because they must be created | |
3853 | before the linker maps input sections to output | |
3854 | sections. The linker does that before | |
3855 | adjust_dynamic_symbol is called, and it is that | |
3856 | function which decides whether anything needs to go | |
3857 | into these sections. */ | |
3858 | ||
8423293d | 3859 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
3860 | continue; |
3861 | } | |
3862 | ||
c456f082 AM |
3863 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3864 | continue; | |
3865 | ||
70256ad8 AJ |
3866 | /* Allocate memory for the section contents. We use bfd_zalloc |
3867 | here in case unused entries are not reclaimed before the | |
3868 | section's contents are written out. This should not happen, | |
3869 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
3870 | of garbage. */ | |
eea6121a | 3871 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 3872 | if (s->contents == NULL) |
b34976b6 | 3873 | return FALSE; |
70256ad8 AJ |
3874 | } |
3875 | ||
e41b3a13 | 3876 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3877 | && htab->plt_eh_frame->contents != NULL) |
3878 | { | |
3879 | const struct elf_x86_64_backend_data *arch_data | |
f8222080 | 3880 | = get_elf_x86_64_arch_data (bed); |
9a2a56cc AM |
3881 | |
3882 | memcpy (htab->plt_eh_frame->contents, | |
3883 | arch_data->eh_frame_plt, htab->plt_eh_frame->size); | |
3884 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
3885 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
3886 | } | |
e41b3a13 | 3887 | |
c434dee6 | 3888 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
3889 | { |
3890 | /* Add some entries to the .dynamic section. We fill in the | |
351f65ca | 3891 | values later, in elf_x86_64_finish_dynamic_sections, but we |
70256ad8 | 3892 | must add the entries now so that we get the correct size for |
407443a3 | 3893 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 3894 | dynamic linker and used by the debugger. */ |
dc810e39 | 3895 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3896 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3897 | |
0e1862bb | 3898 | if (bfd_link_executable (info)) |
70256ad8 | 3899 | { |
dc810e39 | 3900 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3901 | return FALSE; |
70256ad8 AJ |
3902 | } |
3903 | ||
6de2ae4a | 3904 | if (htab->elf.splt->size != 0) |
70256ad8 | 3905 | { |
7c1e8d3e L |
3906 | /* DT_PLTGOT is used by prelink even if there is no PLT |
3907 | relocation. */ | |
3908 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
b34976b6 | 3909 | return FALSE; |
67a4f2b7 | 3910 | |
7c1e8d3e L |
3911 | if (htab->elf.srelplt->size != 0) |
3912 | { | |
3913 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
3914 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
3915 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
3916 | return FALSE; | |
3917 | } | |
3918 | ||
67a4f2b7 AO |
3919 | if (htab->tlsdesc_plt |
3920 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
3921 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
3922 | return FALSE; | |
70256ad8 AJ |
3923 | } |
3924 | ||
3925 | if (relocs) | |
3926 | { | |
dc810e39 AM |
3927 | if (!add_dynamic_entry (DT_RELA, 0) |
3928 | || !add_dynamic_entry (DT_RELASZ, 0) | |
351f65ca | 3929 | || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela)) |
b34976b6 | 3930 | return FALSE; |
70256ad8 | 3931 | |
c434dee6 AJ |
3932 | /* If any dynamic relocs apply to a read-only section, |
3933 | then we need a DT_TEXTREL entry. */ | |
3934 | if ((info->flags & DF_TEXTREL) == 0) | |
eed180f8 | 3935 | elf_link_hash_traverse (&htab->elf, |
351f65ca | 3936 | elf_x86_64_readonly_dynrelocs, |
eb4ff4d6 | 3937 | info); |
c434dee6 AJ |
3938 | |
3939 | if ((info->flags & DF_TEXTREL) != 0) | |
3940 | { | |
2df3368d | 3941 | if (htab->readonly_dynrelocs_against_ifunc) |
8efa2874 L |
3942 | { |
3943 | info->callbacks->einfo | |
3944 | (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n")); | |
3945 | bfd_set_error (bfd_error_bad_value); | |
3946 | return FALSE; | |
3947 | } | |
3948 | ||
c434dee6 | 3949 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 3950 | return FALSE; |
c434dee6 | 3951 | } |
70256ad8 AJ |
3952 | } |
3953 | } | |
dc810e39 | 3954 | #undef add_dynamic_entry |
70256ad8 | 3955 | |
b34976b6 | 3956 | return TRUE; |
70256ad8 AJ |
3957 | } |
3958 | ||
67a4f2b7 | 3959 | static bfd_boolean |
351f65ca L |
3960 | elf_x86_64_always_size_sections (bfd *output_bfd, |
3961 | struct bfd_link_info *info) | |
67a4f2b7 AO |
3962 | { |
3963 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3964 | ||
3965 | if (tls_sec) | |
3966 | { | |
3967 | struct elf_link_hash_entry *tlsbase; | |
3968 | ||
3969 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3970 | "_TLS_MODULE_BASE_", | |
3971 | FALSE, FALSE, FALSE); | |
3972 | ||
3973 | if (tlsbase && tlsbase->type == STT_TLS) | |
3974 | { | |
351f65ca | 3975 | struct elf_x86_64_link_hash_table *htab; |
67a4f2b7 AO |
3976 | struct bfd_link_hash_entry *bh = NULL; |
3977 | const struct elf_backend_data *bed | |
3978 | = get_elf_backend_data (output_bfd); | |
3979 | ||
351f65ca | 3980 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3981 | if (htab == NULL) |
3982 | return FALSE; | |
3983 | ||
67a4f2b7 AO |
3984 | if (!(_bfd_generic_link_add_one_symbol |
3985 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3986 | tls_sec, 0, NULL, FALSE, | |
3987 | bed->collect, &bh))) | |
3988 | return FALSE; | |
9f03412a | 3989 | |
4dfe6ac6 | 3990 | htab->tls_module_base = bh; |
9f03412a | 3991 | |
67a4f2b7 AO |
3992 | tlsbase = (struct elf_link_hash_entry *)bh; |
3993 | tlsbase->def_regular = 1; | |
3994 | tlsbase->other = STV_HIDDEN; | |
576fa883 | 3995 | tlsbase->root.linker_def = 1; |
67a4f2b7 AO |
3996 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
3997 | } | |
3998 | } | |
3999 | ||
4000 | return TRUE; | |
4001 | } | |
4002 | ||
9f03412a AO |
4003 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
4004 | executables. Rather than setting it to the beginning of the TLS | |
4005 | section, we have to set it to the end. This function may be called | |
4006 | multiple times, it is idempotent. */ | |
4007 | ||
4008 | static void | |
351f65ca | 4009 | elf_x86_64_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 4010 | { |
351f65ca | 4011 | struct elf_x86_64_link_hash_table *htab; |
9f03412a AO |
4012 | struct bfd_link_hash_entry *base; |
4013 | ||
0e1862bb | 4014 | if (!bfd_link_executable (info)) |
9f03412a AO |
4015 | return; |
4016 | ||
351f65ca | 4017 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4018 | if (htab == NULL) |
4019 | return; | |
9f03412a | 4020 | |
4dfe6ac6 NC |
4021 | base = htab->tls_module_base; |
4022 | if (base == NULL) | |
9f03412a AO |
4023 | return; |
4024 | ||
4dfe6ac6 | 4025 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
4026 | } |
4027 | ||
bffbf940 JJ |
4028 | /* Return the base VMA address which should be subtracted from real addresses |
4029 | when resolving @dtpoff relocation. | |
4030 | This is PT_TLS segment p_vaddr. */ | |
4031 | ||
4032 | static bfd_vma | |
351f65ca | 4033 | elf_x86_64_dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 4034 | { |
e1918d23 AM |
4035 | /* If tls_sec is NULL, we should have signalled an error already. */ |
4036 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 4037 | return 0; |
e1918d23 | 4038 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
4039 | } |
4040 | ||
4041 | /* Return the relocation value for @tpoff relocation | |
4042 | if STT_TLS virtual address is ADDRESS. */ | |
4043 | ||
4044 | static bfd_vma | |
351f65ca | 4045 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 4046 | { |
e1918d23 | 4047 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
4048 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
4049 | bfd_vma static_tls_size; | |
bffbf940 JJ |
4050 | |
4051 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 4052 | if (htab->tls_sec == NULL) |
bffbf940 | 4053 | return 0; |
7dc98aea RO |
4054 | |
4055 | /* Consider special static TLS alignment requirements. */ | |
4056 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
4057 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
4058 | } |
4059 | ||
90f487df L |
4060 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
4061 | branch? */ | |
4062 | ||
4063 | static bfd_boolean | |
4064 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
4065 | { | |
4066 | /* Opcode Instruction | |
4067 | 0xe8 call | |
4068 | 0xe9 jump | |
4069 | 0x0f 0x8x conditional jump */ | |
4070 | return ((offset > 0 | |
4071 | && (contents [offset - 1] == 0xe8 | |
4072 | || contents [offset - 1] == 0xe9)) | |
4073 | || (offset > 1 | |
4074 | && contents [offset - 2] == 0x0f | |
4075 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
4076 | } | |
4077 | ||
8d88c4ca NC |
4078 | /* Relocate an x86_64 ELF section. */ |
4079 | ||
b34976b6 | 4080 | static bfd_boolean |
351f65ca L |
4081 | elf_x86_64_relocate_section (bfd *output_bfd, |
4082 | struct bfd_link_info *info, | |
4083 | bfd *input_bfd, | |
4084 | asection *input_section, | |
4085 | bfd_byte *contents, | |
4086 | Elf_Internal_Rela *relocs, | |
4087 | Elf_Internal_Sym *local_syms, | |
4088 | asection **local_sections) | |
8d88c4ca | 4089 | { |
351f65ca | 4090 | struct elf_x86_64_link_hash_table *htab; |
8d88c4ca NC |
4091 | Elf_Internal_Shdr *symtab_hdr; |
4092 | struct elf_link_hash_entry **sym_hashes; | |
4093 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 4094 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 4095 | Elf_Internal_Rela *rel; |
60f2e42e | 4096 | Elf_Internal_Rela *wrel; |
8d88c4ca | 4097 | Elf_Internal_Rela *relend; |
eed180f8 | 4098 | const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
8d88c4ca | 4099 | |
0ffa91dd NC |
4100 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
4101 | ||
338c190a L |
4102 | /* Skip if check_relocs failed. */ |
4103 | if (input_section->check_relocs_failed) | |
4104 | return FALSE; | |
4105 | ||
351f65ca | 4106 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4107 | if (htab == NULL) |
4108 | return FALSE; | |
0ffa91dd | 4109 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
4110 | sym_hashes = elf_sym_hashes (input_bfd); |
4111 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
351f65ca | 4112 | local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 4113 | |
351f65ca | 4114 | elf_x86_64_set_tls_module_base (info); |
9f03412a | 4115 | |
60f2e42e | 4116 | rel = wrel = relocs; |
8d88c4ca | 4117 | relend = relocs + input_section->reloc_count; |
60f2e42e | 4118 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 4119 | { |
bffbf940 | 4120 | unsigned int r_type; |
8d88c4ca NC |
4121 | reloc_howto_type *howto; |
4122 | unsigned long r_symndx; | |
4123 | struct elf_link_hash_entry *h; | |
0ff2b86e | 4124 | struct elf_x86_64_link_hash_entry *eh; |
8d88c4ca NC |
4125 | Elf_Internal_Sym *sym; |
4126 | asection *sec; | |
0ff2b86e | 4127 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 4128 | bfd_vma relocation; |
b34976b6 | 4129 | bfd_boolean unresolved_reloc; |
8d88c4ca | 4130 | bfd_reloc_status_type r; |
bffbf940 | 4131 | int tls_type; |
0ff2b86e | 4132 | asection *base_got, *resolved_plt; |
1788fc08 | 4133 | bfd_vma st_size; |
aec6b87e | 4134 | bfd_boolean resolved_to_zero; |
8d88c4ca | 4135 | |
351f65ca | 4136 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
4137 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
4138 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
4139 | { |
4140 | if (wrel != rel) | |
4141 | *wrel = *rel; | |
4142 | continue; | |
4143 | } | |
8d88c4ca | 4144 | |
9911c0fc | 4145 | if (r_type >= (int) R_X86_64_standard) |
8da6118f | 4146 | { |
9911c0fc L |
4147 | (*_bfd_error_handler) |
4148 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), | |
4149 | input_bfd, input_section, r_type); | |
8da6118f | 4150 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 4151 | return FALSE; |
8da6118f | 4152 | } |
8d88c4ca | 4153 | |
d7921315 | 4154 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 4155 | || ABI_64_P (output_bfd)) |
d7921315 L |
4156 | howto = x86_64_elf_howto_table + r_type; |
4157 | else | |
4158 | howto = (x86_64_elf_howto_table | |
4159 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 4160 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
4161 | h = NULL; |
4162 | sym = NULL; | |
4163 | sec = NULL; | |
b34976b6 | 4164 | unresolved_reloc = FALSE; |
8d88c4ca | 4165 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
4166 | { |
4167 | sym = local_syms + r_symndx; | |
4168 | sec = local_sections[r_symndx]; | |
c434dee6 | 4169 | |
c25bc9fc L |
4170 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
4171 | &sec, rel); | |
1788fc08 | 4172 | st_size = sym->st_size; |
c25bc9fc L |
4173 | |
4174 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 4175 | if (!bfd_link_relocatable (info) |
351f65ca | 4176 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 4177 | { |
351f65ca L |
4178 | h = elf_x86_64_get_local_sym_hash (htab, input_bfd, |
4179 | rel, FALSE); | |
c25bc9fc L |
4180 | if (h == NULL) |
4181 | abort (); | |
4182 | ||
eed180f8 | 4183 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
4184 | h->root.u.def.value = sym->st_value; |
4185 | h->root.u.def.section = sec; | |
4186 | } | |
8da6118f | 4187 | } |
8d88c4ca | 4188 | else |
8da6118f | 4189 | { |
c9736ba0 | 4190 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 4191 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
c434dee6 | 4192 | |
b2a8e766 AM |
4193 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
4194 | r_symndx, symtab_hdr, sym_hashes, | |
4195 | h, sec, relocation, | |
62d887d4 | 4196 | unresolved_reloc, warned, ignored); |
1788fc08 | 4197 | st_size = h->size; |
8da6118f | 4198 | } |
ab96bf03 | 4199 | |
dbaa2011 | 4200 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
4201 | { |
4202 | _bfd_clear_contents (howto, input_bfd, input_section, | |
4203 | contents + rel->r_offset); | |
4204 | wrel->r_offset = rel->r_offset; | |
4205 | wrel->r_info = 0; | |
4206 | wrel->r_addend = 0; | |
4207 | ||
4208 | /* For ld -r, remove relocations in debug sections against | |
4209 | sections defined in discarded sections. Not done for | |
4210 | eh_frame editing code expects to be present. */ | |
4211 | if (bfd_link_relocatable (info) | |
4212 | && (input_section->flags & SEC_DEBUGGING)) | |
4213 | wrel--; | |
4214 | ||
4215 | continue; | |
4216 | } | |
ab96bf03 | 4217 | |
0e1862bb | 4218 | if (bfd_link_relocatable (info)) |
2d5da473 L |
4219 | { |
4220 | if (wrel != rel) | |
4221 | *wrel = *rel; | |
4222 | continue; | |
4223 | } | |
ab96bf03 | 4224 | |
1788fc08 | 4225 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 4226 | { |
1788fc08 L |
4227 | if (r_type == R_X86_64_64) |
4228 | { | |
4229 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
4230 | zero-extend it to 64bit if addend is zero. */ | |
4231 | r_type = R_X86_64_32; | |
4232 | memset (contents + rel->r_offset + 4, 0, 4); | |
4233 | } | |
4234 | else if (r_type == R_X86_64_SIZE64) | |
4235 | { | |
4236 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
4237 | zero-extend it to 64bit if addend is zero. */ | |
4238 | r_type = R_X86_64_SIZE32; | |
4239 | memset (contents + rel->r_offset + 4, 0, 4); | |
4240 | } | |
64d25c44 L |
4241 | } |
4242 | ||
0ff2b86e L |
4243 | eh = (struct elf_x86_64_link_hash_entry *) h; |
4244 | ||
cbe950e9 L |
4245 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
4246 | it here if it is defined in a non-shared object. */ | |
4247 | if (h != NULL | |
4248 | && h->type == STT_GNU_IFUNC | |
4249 | && h->def_regular) | |
4250 | { | |
cbe950e9 | 4251 | bfd_vma plt_index; |
4c544807 | 4252 | const char *name; |
cbe950e9 | 4253 | |
97dc35c8 L |
4254 | if ((input_section->flags & SEC_ALLOC) == 0) |
4255 | { | |
4256 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
4257 | sections because such sections are not SEC_ALLOC and | |
4258 | thus ld.so will not process them. */ | |
4259 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 4260 | continue; |
97dc35c8 L |
4261 | abort (); |
4262 | } | |
233cc9c1 L |
4263 | |
4264 | switch (r_type) | |
4265 | { | |
4266 | default: | |
4267 | break; | |
4268 | ||
4269 | case R_X86_64_GOTPCREL: | |
4270 | case R_X86_64_GOTPCRELX: | |
4271 | case R_X86_64_REX_GOTPCRELX: | |
4272 | case R_X86_64_GOTPCREL64: | |
4273 | base_got = htab->elf.sgot; | |
4274 | off = h->got.offset; | |
4275 | ||
4276 | if (base_got == NULL) | |
4277 | abort (); | |
4278 | ||
4279 | if (off == (bfd_vma) -1) | |
4280 | { | |
4281 | /* We can't use h->got.offset here to save state, or | |
4282 | even just remember the offset, as finish_dynamic_symbol | |
4283 | would use that as offset into .got. */ | |
4284 | ||
4285 | if (h->plt.offset == (bfd_vma) -1) | |
4286 | abort (); | |
4287 | ||
4288 | if (htab->elf.splt != NULL) | |
4289 | { | |
4290 | plt_index = h->plt.offset / plt_entry_size - 1; | |
4291 | off = (plt_index + 3) * GOT_ENTRY_SIZE; | |
4292 | base_got = htab->elf.sgotplt; | |
4293 | } | |
4294 | else | |
4295 | { | |
4296 | plt_index = h->plt.offset / plt_entry_size; | |
4297 | off = plt_index * GOT_ENTRY_SIZE; | |
4298 | base_got = htab->elf.igotplt; | |
4299 | } | |
4300 | ||
4301 | if (h->dynindx == -1 | |
4302 | || h->forced_local | |
4303 | || info->symbolic) | |
4304 | { | |
4305 | /* This references the local defitionion. We must | |
4306 | initialize this entry in the global offset table. | |
4307 | Since the offset must always be a multiple of 8, | |
4308 | we use the least significant bit to record | |
4309 | whether we have initialized it already. | |
4310 | ||
4311 | When doing a dynamic link, we create a .rela.got | |
4312 | relocation entry to initialize the value. This | |
4313 | is done in the finish_dynamic_symbol routine. */ | |
4314 | if ((off & 1) != 0) | |
4315 | off &= ~1; | |
4316 | else | |
4317 | { | |
4318 | bfd_put_64 (output_bfd, relocation, | |
4319 | base_got->contents + off); | |
4320 | /* Note that this is harmless for the GOTPLT64 | |
4321 | case, as -1 | 1 still is -1. */ | |
4322 | h->got.offset |= 1; | |
4323 | } | |
4324 | } | |
4325 | } | |
4326 | ||
4327 | relocation = (base_got->output_section->vma | |
4328 | + base_got->output_offset + off); | |
4329 | ||
4330 | goto do_relocation; | |
4331 | } | |
4332 | ||
4333 | if (h->plt.offset == (bfd_vma) -1) | |
4334 | { | |
4335 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
4336 | if (r_type == htab->pointer_r_type | |
4337 | && (input_section->flags & SEC_CODE) == 0) | |
4338 | goto do_ifunc_pointer; | |
4339 | goto bad_ifunc_reloc; | |
4340 | } | |
cbe950e9 L |
4341 | |
4342 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
4343 | if (htab->elf.splt != NULL) |
4344 | { | |
4345 | if (htab->plt_bnd != NULL) | |
4346 | { | |
4347 | resolved_plt = htab->plt_bnd; | |
4348 | plt_offset = eh->plt_bnd.offset; | |
4349 | } | |
4350 | else | |
4351 | { | |
4352 | resolved_plt = htab->elf.splt; | |
4353 | plt_offset = h->plt.offset; | |
4354 | } | |
4355 | } | |
4356 | else | |
4357 | { | |
4358 | resolved_plt = htab->elf.iplt; | |
4359 | plt_offset = h->plt.offset; | |
4360 | } | |
4361 | ||
4362 | relocation = (resolved_plt->output_section->vma | |
4363 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
4364 | |
4365 | switch (r_type) | |
4366 | { | |
4367 | default: | |
233cc9c1 | 4368 | bad_ifunc_reloc: |
4c544807 L |
4369 | if (h->root.root.string) |
4370 | name = h->root.root.string; | |
4371 | else | |
4372 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
4373 | NULL); | |
cbe950e9 L |
4374 | (*_bfd_error_handler) |
4375 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
233cc9c1 L |
4376 | "symbol `%s' isn't supported"), input_bfd, |
4377 | howto->name, name); | |
cbe950e9 L |
4378 | bfd_set_error (bfd_error_bad_value); |
4379 | return FALSE; | |
4380 | ||
4381 | case R_X86_64_32S: | |
0e1862bb | 4382 | if (bfd_link_pic (info)) |
cbe950e9 | 4383 | abort (); |
710ab287 L |
4384 | goto do_relocation; |
4385 | ||
248775ba L |
4386 | case R_X86_64_32: |
4387 | if (ABI_64_P (output_bfd)) | |
4388 | goto do_relocation; | |
17672001 | 4389 | /* FALLTHROUGH */ |
eed180f8 | 4390 | case R_X86_64_64: |
233cc9c1 | 4391 | do_ifunc_pointer: |
710ab287 L |
4392 | if (rel->r_addend != 0) |
4393 | { | |
4c544807 L |
4394 | if (h->root.root.string) |
4395 | name = h->root.root.string; | |
4396 | else | |
4397 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
4398 | sym, NULL); | |
710ab287 L |
4399 | (*_bfd_error_handler) |
4400 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
4401 | "symbol `%s' has non-zero addend: %d"), | |
ef77d6af | 4402 | input_bfd, howto->name, name, rel->r_addend); |
710ab287 L |
4403 | bfd_set_error (bfd_error_bad_value); |
4404 | return FALSE; | |
4405 | } | |
4406 | ||
4407 | /* Generate dynamic relcoation only when there is a | |
233cc9c1 L |
4408 | non-GOT reference in a shared object or there is no |
4409 | PLT. */ | |
4410 | if ((bfd_link_pic (info) && h->non_got_ref) | |
4411 | || h->plt.offset == (bfd_vma) -1) | |
710ab287 L |
4412 | { |
4413 | Elf_Internal_Rela outrel; | |
710ab287 L |
4414 | asection *sreloc; |
4415 | ||
c25bc9fc L |
4416 | /* Need a dynamic relocation to get the real function |
4417 | address. */ | |
710ab287 L |
4418 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
4419 | info, | |
4420 | input_section, | |
4421 | rel->r_offset); | |
4422 | if (outrel.r_offset == (bfd_vma) -1 | |
4423 | || outrel.r_offset == (bfd_vma) -2) | |
4424 | abort (); | |
4425 | ||
4426 | outrel.r_offset += (input_section->output_section->vma | |
4427 | + input_section->output_offset); | |
4428 | ||
4429 | if (h->dynindx == -1 | |
44c4ea11 | 4430 | || h->forced_local |
0e1862bb | 4431 | || bfd_link_executable (info)) |
710ab287 L |
4432 | { |
4433 | /* This symbol is resolved locally. */ | |
56b8aada L |
4434 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
4435 | outrel.r_addend = (h->root.u.def.value | |
4436 | + h->root.u.def.section->output_section->vma | |
4437 | + h->root.u.def.section->output_offset); | |
710ab287 L |
4438 | } |
4439 | else | |
4440 | { | |
351f65ca | 4441 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
4442 | outrel.r_addend = 0; |
4443 | } | |
4444 | ||
233cc9c1 L |
4445 | /* Dynamic relocations are stored in |
4446 | 1. .rela.ifunc section in PIC object. | |
4447 | 2. .rela.got section in dynamic executable. | |
4448 | 3. .rela.iplt section in static executable. */ | |
4449 | if (bfd_link_pic (info)) | |
4450 | sreloc = htab->elf.irelifunc; | |
4451 | else if (htab->elf.splt != NULL) | |
4452 | sreloc = htab->elf.srelgot; | |
4453 | else | |
4454 | sreloc = htab->elf.irelplt; | |
351f65ca | 4455 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
4456 | |
4457 | /* If this reloc is against an external symbol, we | |
4458 | do not want to fiddle with the addend. Otherwise, | |
4459 | we need to include the symbol value so that it | |
4460 | becomes an addend for the dynamic reloc. For an | |
4461 | internal symbol, we have updated addend. */ | |
56b8aada | 4462 | continue; |
710ab287 | 4463 | } |
17672001 | 4464 | /* FALLTHROUGH */ |
cbe950e9 | 4465 | case R_X86_64_PC32: |
c3320543 | 4466 | case R_X86_64_PC32_BND: |
cbe950e9 L |
4467 | case R_X86_64_PC64: |
4468 | case R_X86_64_PLT32: | |
c3320543 | 4469 | case R_X86_64_PLT32_BND: |
cbe950e9 | 4470 | goto do_relocation; |
cbe950e9 L |
4471 | } |
4472 | } | |
4473 | ||
aec6b87e | 4474 | resolved_to_zero = (eh != NULL |
e62b9723 L |
4475 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
4476 | eh->has_got_reloc, | |
4477 | eh)); | |
aec6b87e | 4478 | |
70256ad8 AJ |
4479 | /* When generating a shared object, the relocations handled here are |
4480 | copied into the output file to be resolved at run time. */ | |
4481 | switch (r_type) | |
4482 | { | |
4483 | case R_X86_64_GOT32: | |
7b81dfbb | 4484 | case R_X86_64_GOT64: |
70256ad8 AJ |
4485 | /* Relocation is to the entry for this symbol in the global |
4486 | offset table. */ | |
70256ad8 | 4487 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
4488 | case R_X86_64_GOTPCRELX: |
4489 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
4490 | case R_X86_64_GOTPCREL64: |
4491 | /* Use global offset table entry as symbol value. */ | |
4492 | case R_X86_64_GOTPLT64: | |
553d1284 | 4493 | /* This is obsolete and treated the the same as GOT64. */ |
6de2ae4a | 4494 | base_got = htab->elf.sgot; |
7b81dfbb | 4495 | |
6de2ae4a | 4496 | if (htab->elf.sgot == NULL) |
c434dee6 | 4497 | abort (); |
053579d7 | 4498 | |
51e0a107 | 4499 | if (h != NULL) |
70256ad8 | 4500 | { |
b34976b6 | 4501 | bfd_boolean dyn; |
c434dee6 AJ |
4502 | |
4503 | off = h->got.offset; | |
7b81dfbb | 4504 | if (h->needs_plt |
eed180f8 | 4505 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
4506 | && off == (bfd_vma)-1) |
4507 | { | |
4508 | /* We can't use h->got.offset here to save | |
4509 | state, or even just remember the offset, as | |
4510 | finish_dynamic_symbol would use that as offset into | |
4511 | .got. */ | |
eed180f8 | 4512 | bfd_vma plt_index = h->plt.offset / plt_entry_size - 1; |
7b81dfbb | 4513 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 4514 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
4515 | } |
4516 | ||
c434dee6 | 4517 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 4518 | |
0e1862bb L |
4519 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
4520 | || (bfd_link_pic (info) | |
27482721 | 4521 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
4522 | || (ELF_ST_VISIBILITY (h->other) |
4523 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
4524 | { |
4525 | /* This is actually a static link, or it is a -Bsymbolic | |
4526 | link and the symbol is defined locally, or the symbol | |
407443a3 | 4527 | was forced to be local because of a version file. We |
51e0a107 JH |
4528 | must initialize this entry in the global offset table. |
4529 | Since the offset must always be a multiple of 8, we | |
4530 | use the least significant bit to record whether we | |
4531 | have initialized it already. | |
4532 | ||
4533 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
4534 | relocation entry to initialize the value. This is |
4535 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
4536 | if ((off & 1) != 0) |
4537 | off &= ~1; | |
4538 | else | |
4539 | { | |
4540 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
4541 | base_got->contents + off); |
4542 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 4543 | as -1 | 1 still is -1. */ |
51e0a107 JH |
4544 | h->got.offset |= 1; |
4545 | } | |
4546 | } | |
053579d7 | 4547 | else |
b34976b6 | 4548 | unresolved_reloc = FALSE; |
70256ad8 | 4549 | } |
51e0a107 JH |
4550 | else |
4551 | { | |
c434dee6 AJ |
4552 | if (local_got_offsets == NULL) |
4553 | abort (); | |
51e0a107 JH |
4554 | |
4555 | off = local_got_offsets[r_symndx]; | |
4556 | ||
4557 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
4558 | the least significant bit to record whether we have |
4559 | already generated the necessary reloc. */ | |
51e0a107 JH |
4560 | if ((off & 1) != 0) |
4561 | off &= ~1; | |
4562 | else | |
4563 | { | |
c434dee6 | 4564 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 4565 | base_got->contents + off); |
51e0a107 | 4566 | |
0e1862bb | 4567 | if (bfd_link_pic (info)) |
51e0a107 | 4568 | { |
947216bf | 4569 | asection *s; |
51e0a107 | 4570 | Elf_Internal_Rela outrel; |
70256ad8 | 4571 | |
51e0a107 JH |
4572 | /* We need to generate a R_X86_64_RELATIVE reloc |
4573 | for the dynamic linker. */ | |
6de2ae4a | 4574 | s = htab->elf.srelgot; |
947216bf | 4575 | if (s == NULL) |
c434dee6 | 4576 | abort (); |
51e0a107 | 4577 | |
7b81dfbb AJ |
4578 | outrel.r_offset = (base_got->output_section->vma |
4579 | + base_got->output_offset | |
51e0a107 | 4580 | + off); |
351f65ca | 4581 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
51e0a107 | 4582 | outrel.r_addend = relocation; |
351f65ca | 4583 | elf_append_rela (output_bfd, s, &outrel); |
51e0a107 JH |
4584 | } |
4585 | ||
4586 | local_got_offsets[r_symndx] |= 1; | |
4587 | } | |
51e0a107 | 4588 | } |
6a2bda3f | 4589 | |
c434dee6 AJ |
4590 | if (off >= (bfd_vma) -2) |
4591 | abort (); | |
4592 | ||
7b81dfbb AJ |
4593 | relocation = base_got->output_section->vma |
4594 | + base_got->output_offset + off; | |
56ceb5b5 L |
4595 | if (r_type != R_X86_64_GOTPCREL |
4596 | && r_type != R_X86_64_GOTPCRELX | |
4597 | && r_type != R_X86_64_REX_GOTPCRELX | |
4598 | && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
4599 | relocation -= htab->elf.sgotplt->output_section->vma |
4600 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 4601 | |
70256ad8 AJ |
4602 | break; |
4603 | ||
d6ab8113 JB |
4604 | case R_X86_64_GOTOFF64: |
4605 | /* Relocation is relative to the start of the global offset | |
4606 | table. */ | |
4607 | ||
3d949995 L |
4608 | /* Check to make sure it isn't a protected function or data |
4609 | symbol for shared library since it may not be local when | |
e3c0e327 L |
4610 | used as function address or with copy relocation. We also |
4611 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 4612 | if (bfd_link_pic (info) && h) |
d6ab8113 | 4613 | { |
e3c0e327 L |
4614 | if (!h->def_regular) |
4615 | { | |
4616 | const char *v; | |
4617 | ||
4618 | switch (ELF_ST_VISIBILITY (h->other)) | |
4619 | { | |
4620 | case STV_HIDDEN: | |
4621 | v = _("hidden symbol"); | |
4622 | break; | |
4623 | case STV_INTERNAL: | |
4624 | v = _("internal symbol"); | |
4625 | break; | |
4626 | case STV_PROTECTED: | |
4627 | v = _("protected symbol"); | |
4628 | break; | |
4629 | default: | |
4630 | v = _("symbol"); | |
4631 | break; | |
4632 | } | |
4633 | ||
4634 | (*_bfd_error_handler) | |
4635 | (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s `%s' can not be used when making a shared object"), | |
4636 | input_bfd, v, h->root.root.string); | |
4637 | bfd_set_error (bfd_error_bad_value); | |
4638 | return FALSE; | |
4639 | } | |
0e1862bb | 4640 | else if (!bfd_link_executable (info) |
e3c0e327 L |
4641 | && !SYMBOL_REFERENCES_LOCAL (info, h) |
4642 | && (h->type == STT_FUNC | |
4643 | || h->type == STT_OBJECT) | |
4644 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
4645 | { | |
4646 | (*_bfd_error_handler) | |
4647 | (_("%B: relocation R_X86_64_GOTOFF64 against protected %s `%s' can not be used when making a shared object"), | |
4648 | input_bfd, | |
4649 | h->type == STT_FUNC ? "function" : "data", | |
4650 | h->root.root.string); | |
4651 | bfd_set_error (bfd_error_bad_value); | |
d6ab8113 | 4652 | return FALSE; |
e3c0e327 | 4653 | } |
d6ab8113 JB |
4654 | } |
4655 | ||
4656 | /* Note that sgot is not involved in this | |
4657 | calculation. We always want the start of .got.plt. If we | |
4658 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
4659 | permitted by the ABI, we might have to change this | |
4660 | calculation. */ | |
6de2ae4a L |
4661 | relocation -= htab->elf.sgotplt->output_section->vma |
4662 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4663 | break; |
4664 | ||
4665 | case R_X86_64_GOTPC32: | |
7b81dfbb | 4666 | case R_X86_64_GOTPC64: |
d6ab8113 | 4667 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
4668 | relocation = htab->elf.sgotplt->output_section->vma |
4669 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4670 | unresolved_reloc = FALSE; |
4671 | break; | |
7b81dfbb AJ |
4672 | |
4673 | case R_X86_64_PLTOFF64: | |
4674 | /* Relocation is PLT entry relative to GOT. For local | |
4675 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 4676 | if (h != NULL |
7b81dfbb AJ |
4677 | /* See PLT32 handling. */ |
4678 | && h->plt.offset != (bfd_vma) -1 | |
6de2ae4a | 4679 | && htab->elf.splt != NULL) |
7b81dfbb | 4680 | { |
0ff2b86e L |
4681 | if (htab->plt_bnd != NULL) |
4682 | { | |
4683 | resolved_plt = htab->plt_bnd; | |
4684 | plt_offset = eh->plt_bnd.offset; | |
4685 | } | |
4686 | else | |
4687 | { | |
4688 | resolved_plt = htab->elf.splt; | |
4689 | plt_offset = h->plt.offset; | |
4690 | } | |
4691 | ||
4692 | relocation = (resolved_plt->output_section->vma | |
4693 | + resolved_plt->output_offset | |
4694 | + plt_offset); | |
7b81dfbb AJ |
4695 | unresolved_reloc = FALSE; |
4696 | } | |
4697 | ||
6de2ae4a L |
4698 | relocation -= htab->elf.sgotplt->output_section->vma |
4699 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 4700 | break; |
d6ab8113 | 4701 | |
70256ad8 | 4702 | case R_X86_64_PLT32: |
c3320543 | 4703 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
4704 | /* Relocation is to the entry for this symbol in the |
4705 | procedure linkage table. */ | |
4706 | ||
4707 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 4708 | without using the procedure linkage table. */ |
70256ad8 AJ |
4709 | if (h == NULL) |
4710 | break; | |
4711 | ||
dd7e64d4 L |
4712 | if ((h->plt.offset == (bfd_vma) -1 |
4713 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 4714 | || htab->elf.splt == NULL) |
70256ad8 AJ |
4715 | { |
4716 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
4717 | happens when statically linking PIC code, or when |
4718 | using -Bsymbolic. */ | |
70256ad8 AJ |
4719 | break; |
4720 | } | |
4721 | ||
dd7e64d4 | 4722 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 4723 | { |
dd7e64d4 L |
4724 | if (htab->plt_bnd != NULL) |
4725 | { | |
4726 | resolved_plt = htab->plt_bnd; | |
4727 | plt_offset = eh->plt_bnd.offset; | |
4728 | } | |
4729 | else | |
4730 | { | |
4731 | resolved_plt = htab->elf.splt; | |
4732 | plt_offset = h->plt.offset; | |
4733 | } | |
0ff2b86e L |
4734 | } |
4735 | else | |
4736 | { | |
dd7e64d4 L |
4737 | /* Use the GOT PLT. */ |
4738 | resolved_plt = htab->plt_got; | |
4739 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
4740 | } |
4741 | ||
4742 | relocation = (resolved_plt->output_section->vma | |
4743 | + resolved_plt->output_offset | |
4744 | + plt_offset); | |
b34976b6 | 4745 | unresolved_reloc = FALSE; |
70256ad8 AJ |
4746 | break; |
4747 | ||
1788fc08 L |
4748 | case R_X86_64_SIZE32: |
4749 | case R_X86_64_SIZE64: | |
1788fc08 L |
4750 | /* Set to symbol size. */ |
4751 | relocation = st_size; | |
4752 | goto direct; | |
4753 | ||
fd8ab9e5 AJ |
4754 | case R_X86_64_PC8: |
4755 | case R_X86_64_PC16: | |
4756 | case R_X86_64_PC32: | |
c3320543 | 4757 | case R_X86_64_PC32_BND: |
6333bc0d | 4758 | /* Don't complain about -fPIC if the symbol is undefined when |
aec6b87e L |
4759 | building executable unless it is unresolved weak symbol. */ |
4760 | if ((input_section->flags & SEC_ALLOC) != 0 | |
90f487df | 4761 | && (input_section->flags & SEC_READONLY) != 0 |
6333bc0d | 4762 | && h != NULL |
aec6b87e L |
4763 | && ((bfd_link_executable (info) |
4764 | && h->root.type == bfd_link_hash_undefweak | |
4765 | && !resolved_to_zero) | |
4766 | || (bfd_link_pic (info) | |
4767 | && !(bfd_link_pie (info) | |
4768 | && h->root.type == bfd_link_hash_undefined)))) | |
6610a52d | 4769 | { |
41bed6dd L |
4770 | bfd_boolean fail = FALSE; |
4771 | bfd_boolean branch | |
c3320543 L |
4772 | = ((r_type == R_X86_64_PC32 |
4773 | || r_type == R_X86_64_PC32_BND) | |
41bed6dd L |
4774 | && is_32bit_relative_branch (contents, rel->r_offset)); |
4775 | ||
4776 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
4777 | { | |
4778 | /* Symbol is referenced locally. Make sure it is | |
4779 | defined locally or for a branch. */ | |
4780 | fail = !h->def_regular && !branch; | |
4781 | } | |
aec6b87e | 4782 | else if (!(bfd_link_pie (info) |
bc696fd5 | 4783 | && (h->needs_copy || eh->needs_copy))) |
41bed6dd | 4784 | { |
9a926d55 L |
4785 | /* Symbol doesn't need copy reloc and isn't referenced |
4786 | locally. We only allow branch to symbol with | |
4787 | non-default visibility. */ | |
41bed6dd L |
4788 | fail = (!branch |
4789 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
4790 | } | |
4791 | ||
4792 | if (fail) | |
338c190a L |
4793 | return elf_x86_64_need_pic (input_bfd, input_section, |
4794 | h, NULL, NULL, howto); | |
6610a52d L |
4795 | } |
4796 | /* Fall through. */ | |
4797 | ||
70256ad8 AJ |
4798 | case R_X86_64_8: |
4799 | case R_X86_64_16: | |
4800 | case R_X86_64_32: | |
d6ab8113 | 4801 | case R_X86_64_PC64: |
6b3db546 | 4802 | case R_X86_64_64: |
80643fbc | 4803 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 4804 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 4805 | |
1788fc08 | 4806 | direct: |
b1e24c02 | 4807 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
4808 | break; |
4809 | ||
9a926d55 | 4810 | /* Don't copy a pc-relative relocation into the output file |
6333bc0d | 4811 | if the symbol needs copy reloc or the symbol is undefined |
04ebc307 | 4812 | when building executable. Copy dynamic function pointer |
aec6b87e L |
4813 | relocations. Don't generate dynamic relocations against |
4814 | resolved undefined weak symbols in PIE. */ | |
0e1862bb | 4815 | if ((bfd_link_pic (info) |
aec6b87e | 4816 | && !(bfd_link_pie (info) |
fd9edc90 | 4817 | && h != NULL |
6333bc0d L |
4818 | && (h->needs_copy |
4819 | || eh->needs_copy | |
4820 | || h->root.type == bfd_link_hash_undefined) | |
9a926d55 | 4821 | && IS_X86_64_PCREL_TYPE (r_type)) |
4bc6e03a | 4822 | && (h == NULL |
aec6b87e L |
4823 | || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
4824 | && !resolved_to_zero) | |
4825 | || h->root.type != bfd_link_hash_undefweak)) | |
1788fc08 L |
4826 | && ((! IS_X86_64_PCREL_TYPE (r_type) |
4827 | && r_type != R_X86_64_SIZE32 | |
4828 | && r_type != R_X86_64_SIZE64) | |
d8045f23 | 4829 | || ! SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c | 4830 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 4831 | && !bfd_link_pic (info) |
c434dee6 AJ |
4832 | && h != NULL |
4833 | && h->dynindx != -1 | |
aec6b87e L |
4834 | && (!h->non_got_ref |
4835 | || eh->func_pointer_refcount > 0 | |
4836 | || (h->root.type == bfd_link_hash_undefweak | |
4837 | && !resolved_to_zero)) | |
bae420ef L |
4838 | && ((h->def_dynamic && !h->def_regular) |
4839 | /* Undefined weak symbol is bound locally when | |
4840 | PIC is false. */ | |
0f88be7a | 4841 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
4842 | { |
4843 | Elf_Internal_Rela outrel; | |
b34976b6 | 4844 | bfd_boolean skip, relocate; |
c434dee6 | 4845 | asection *sreloc; |
70256ad8 AJ |
4846 | |
4847 | /* When generating a shared object, these relocations | |
4848 | are copied into the output file to be resolved at run | |
407443a3 | 4849 | time. */ |
b34976b6 AM |
4850 | skip = FALSE; |
4851 | relocate = FALSE; | |
70256ad8 | 4852 | |
c629eae0 JJ |
4853 | outrel.r_offset = |
4854 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 4855 | rel->r_offset); |
c629eae0 | 4856 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 4857 | skip = TRUE; |
0fb19cbc | 4858 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 4859 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
4860 | |
4861 | outrel.r_offset += (input_section->output_section->vma | |
4862 | + input_section->output_offset); | |
4863 | ||
4864 | if (skip) | |
0bb2d96a | 4865 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 4866 | |
fd8ab9e5 AJ |
4867 | /* h->dynindx may be -1 if this symbol was marked to |
4868 | become local. */ | |
4869 | else if (h != NULL | |
c434dee6 | 4870 | && h->dynindx != -1 |
d8045f23 | 4871 | && (IS_X86_64_PCREL_TYPE (r_type) |
4e0c91e4 L |
4872 | || !(bfd_link_executable (info) |
4873 | || SYMBOLIC_BIND (info, h)) | |
d8045f23 | 4874 | || ! h->def_regular)) |
70256ad8 | 4875 | { |
351f65ca | 4876 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 4877 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
4878 | } |
4879 | else | |
4880 | { | |
4c10bbaa L |
4881 | /* This symbol is local, or marked to become local. |
4882 | When relocation overflow check is disabled, we | |
4883 | convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
4884 | if (r_type == htab->pointer_r_type | |
4885 | || (r_type == R_X86_64_32 | |
4886 | && info->no_reloc_overflow_check)) | |
607c0e09 | 4887 | { |
b34976b6 | 4888 | relocate = TRUE; |
351f65ca | 4889 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
4890 | outrel.r_addend = relocation + rel->r_addend; |
4891 | } | |
64d25c44 L |
4892 | else if (r_type == R_X86_64_64 |
4893 | && !ABI_64_P (output_bfd)) | |
4894 | { | |
4895 | relocate = TRUE; | |
4896 | outrel.r_info = htab->r_info (0, | |
4897 | R_X86_64_RELATIVE64); | |
4898 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
4899 | /* Check addend overflow. */ |
4900 | if ((outrel.r_addend & 0x80000000) | |
4901 | != (rel->r_addend & 0x80000000)) | |
4902 | { | |
4903 | const char *name; | |
268a8d3a | 4904 | int addend = rel->r_addend; |
8cf0d2dd L |
4905 | if (h && h->root.root.string) |
4906 | name = h->root.root.string; | |
4907 | else | |
4908 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
4909 | sym, NULL); | |
6f2c9068 L |
4910 | if (addend < 0) |
4911 | (*_bfd_error_handler) | |
268a8d3a | 4912 | (_("%B: addend -0x%x in relocation %s against " |
6f2c9068 L |
4913 | "symbol `%s' at 0x%lx in section `%A' is " |
4914 | "out of range"), | |
4915 | input_bfd, input_section, addend, | |
ef77d6af L |
4916 | howto->name, name, |
4917 | (unsigned long) rel->r_offset); | |
6f2c9068 L |
4918 | else |
4919 | (*_bfd_error_handler) | |
268a8d3a | 4920 | (_("%B: addend 0x%x in relocation %s against " |
6f2c9068 L |
4921 | "symbol `%s' at 0x%lx in section `%A' is " |
4922 | "out of range"), | |
4923 | input_bfd, input_section, addend, | |
ef77d6af L |
4924 | howto->name, name, |
4925 | (unsigned long) rel->r_offset); | |
8cf0d2dd L |
4926 | bfd_set_error (bfd_error_bad_value); |
4927 | return FALSE; | |
4928 | } | |
64d25c44 | 4929 | } |
607c0e09 AS |
4930 | else |
4931 | { | |
4932 | long sindx; | |
4933 | ||
8517fae7 | 4934 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
4935 | sindx = 0; |
4936 | else if (sec == NULL || sec->owner == NULL) | |
4937 | { | |
4938 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 4939 | return FALSE; |
607c0e09 AS |
4940 | } |
4941 | else | |
4942 | { | |
4943 | asection *osec; | |
4944 | ||
74541ad4 AM |
4945 | /* We are turning this relocation into one |
4946 | against a section symbol. It would be | |
4947 | proper to subtract the symbol's value, | |
4948 | osec->vma, from the emitted reloc addend, | |
4949 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
4950 | osec = sec->output_section; |
4951 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
4952 | if (sindx == 0) |
4953 | { | |
4954 | asection *oi = htab->elf.text_index_section; | |
4955 | sindx = elf_section_data (oi)->dynindx; | |
4956 | } | |
4957 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
4958 | } |
4959 | ||
351f65ca | 4960 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
4961 | outrel.r_addend = relocation + rel->r_addend; |
4962 | } | |
70256ad8 AJ |
4963 | } |
4964 | ||
cbe950e9 | 4965 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 4966 | |
62d78908 L |
4967 | if (sreloc == NULL || sreloc->contents == NULL) |
4968 | { | |
4969 | r = bfd_reloc_notsupported; | |
4970 | goto check_relocation_error; | |
4971 | } | |
c434dee6 | 4972 | |
351f65ca | 4973 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
4974 | |
4975 | /* If this reloc is against an external symbol, we do | |
4976 | not want to fiddle with the addend. Otherwise, we | |
4977 | need to include the symbol value so that it becomes | |
4978 | an addend for the dynamic reloc. */ | |
0f88be7a | 4979 | if (! relocate) |
70256ad8 AJ |
4980 | continue; |
4981 | } | |
4982 | ||
4983 | break; | |
4984 | ||
bffbf940 | 4985 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
4986 | case R_X86_64_GOTPC32_TLSDESC: |
4987 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 4988 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
4989 | tls_type = GOT_UNKNOWN; |
4990 | if (h == NULL && local_got_offsets) | |
351f65ca | 4991 | tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 4992 | else if (h != NULL) |
351f65ca | 4993 | tls_type = elf_x86_64_hash_entry (h)->tls_type; |
142411ca | 4994 | |
351f65ca L |
4995 | if (! elf_x86_64_tls_transition (info, input_bfd, |
4996 | input_section, contents, | |
4997 | symtab_hdr, sym_hashes, | |
4998 | &r_type, tls_type, rel, | |
bedfd056 | 4999 | relend, h, r_symndx, TRUE)) |
534a31f6 | 5000 | return FALSE; |
bffbf940 JJ |
5001 | |
5002 | if (r_type == R_X86_64_TPOFF32) | |
5003 | { | |
142411ca L |
5004 | bfd_vma roff = rel->r_offset; |
5005 | ||
bffbf940 | 5006 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 5007 | |
351f65ca | 5008 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 5009 | { |
52bc799a | 5010 | /* GD->LE transition. For 64bit, change |
e2cbcd91 L |
5011 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
5012 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5013 | or | |
5014 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
5015 | .byte 0x66; rex64 | |
5016 | call *__tls_get_addr@GOTPCREL(%rip) | |
5017 | which may be converted to | |
5018 | addr32 call __tls_get_addr | |
52bc799a | 5019 | into: |
e2cbcd91 L |
5020 | movq %fs:0, %rax |
5021 | leaq foo@tpoff(%rax), %rax | |
52bc799a | 5022 | For 32bit, change |
e2cbcd91 L |
5023 | leaq foo@tlsgd(%rip), %rdi |
5024 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5025 | or | |
5026 | leaq foo@tlsgd(%rip), %rdi | |
5027 | .byte 0x66; rex64 | |
5028 | call *__tls_get_addr@GOTPCREL(%rip) | |
5029 | which may be converted to | |
5030 | addr32 call __tls_get_addr | |
52bc799a | 5031 | into: |
e2cbcd91 L |
5032 | movl %fs:0, %eax |
5033 | leaq foo@tpoff(%rax), %rax | |
5c98a14e | 5034 | For largepic, change: |
e2cbcd91 L |
5035 | leaq foo@tlsgd(%rip), %rdi |
5036 | movabsq $__tls_get_addr@pltoff, %rax | |
5037 | addq %r15, %rax | |
5038 | call *%rax | |
5c98a14e | 5039 | into: |
e2cbcd91 L |
5040 | movq %fs:0, %rax |
5041 | leaq foo@tpoff(%rax), %rax | |
5042 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 5043 | int largepic = 0; |
e2cbcd91 | 5044 | if (ABI_64_P (output_bfd)) |
5c98a14e | 5045 | { |
e2cbcd91 L |
5046 | if (contents[roff + 5] == 0xb8) |
5047 | { | |
5048 | memcpy (contents + roff - 3, | |
5049 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
5050 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
5051 | largepic = 1; | |
5052 | } | |
5053 | else | |
5054 | memcpy (contents + roff - 4, | |
5055 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
5056 | 16); | |
5c98a14e | 5057 | } |
52bc799a L |
5058 | else |
5059 | memcpy (contents + roff - 3, | |
5060 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
5061 | 15); | |
eb4ff4d6 | 5062 | bfd_put_32 (output_bfd, |
351f65ca | 5063 | elf_x86_64_tpoff (info, relocation), |
5c98a14e | 5064 | contents + roff + 8 + largepic); |
e2cbcd91 L |
5065 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, |
5066 | R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */ | |
bffbf940 | 5067 | rel++; |
60f2e42e | 5068 | wrel++; |
bffbf940 JJ |
5069 | continue; |
5070 | } | |
351f65ca | 5071 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
5072 | { |
5073 | /* GDesc -> LE transition. | |
5074 | It's originally something like: | |
5075 | leaq x@tlsdesc(%rip), %rax | |
5076 | ||
5077 | Change it to: | |
c9736ba0 | 5078 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 5079 | |
c9736ba0 | 5080 | unsigned int val, type; |
67a4f2b7 | 5081 | |
67a4f2b7 | 5082 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 5083 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
5084 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
5085 | contents + roff - 3); | |
5086 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
5087 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
5088 | contents + roff - 1); | |
eb4ff4d6 | 5089 | bfd_put_32 (output_bfd, |
351f65ca | 5090 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
5091 | contents + roff); |
5092 | continue; | |
5093 | } | |
351f65ca | 5094 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
5095 | { |
5096 | /* GDesc -> LE transition. | |
5097 | It's originally: | |
5098 | call *(%rax) | |
5099 | Turn it into: | |
142411ca | 5100 | xchg %ax,%ax. */ |
10efb593 | 5101 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
5102 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
5103 | continue; | |
5104 | } | |
351f65ca | 5105 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 5106 | { |
bffbf940 | 5107 | /* IE->LE transition: |
cf61b747 | 5108 | For 64bit, originally it can be one of: |
bffbf940 JJ |
5109 | movq foo@gottpoff(%rip), %reg |
5110 | addq foo@gottpoff(%rip), %reg | |
5111 | We change it into: | |
5112 | movq $foo, %reg | |
5113 | leaq foo(%reg), %reg | |
cf61b747 L |
5114 | addq $foo, %reg. |
5115 | For 32bit, originally it can be one of: | |
5116 | movq foo@gottpoff(%rip), %reg | |
5117 | addl foo@gottpoff(%rip), %reg | |
5118 | We change it into: | |
5119 | movq $foo, %reg | |
5120 | leal foo(%reg), %reg | |
5121 | addl $foo, %reg. */ | |
142411ca L |
5122 | |
5123 | unsigned int val, type, reg; | |
5124 | ||
cf61b747 L |
5125 | if (roff >= 3) |
5126 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
5127 | else | |
5128 | val = 0; | |
142411ca L |
5129 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
5130 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 5131 | reg >>= 3; |
bffbf940 JJ |
5132 | if (type == 0x8b) |
5133 | { | |
5134 | /* movq */ | |
5135 | if (val == 0x4c) | |
5136 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 5137 | contents + roff - 3); |
4a4c5f25 L |
5138 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5139 | bfd_put_8 (output_bfd, 0x41, | |
5140 | contents + roff - 3); | |
bffbf940 | 5141 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 5142 | contents + roff - 2); |
bffbf940 | 5143 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 5144 | contents + roff - 1); |
bffbf940 JJ |
5145 | } |
5146 | else if (reg == 4) | |
5147 | { | |
cf61b747 L |
5148 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
5149 | is special */ | |
bffbf940 JJ |
5150 | if (val == 0x4c) |
5151 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 5152 | contents + roff - 3); |
4a4c5f25 L |
5153 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5154 | bfd_put_8 (output_bfd, 0x41, | |
5155 | contents + roff - 3); | |
bffbf940 | 5156 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 5157 | contents + roff - 2); |
bffbf940 | 5158 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 5159 | contents + roff - 1); |
bffbf940 JJ |
5160 | } |
5161 | else | |
5162 | { | |
cf61b747 | 5163 | /* addq/addl -> leaq/leal */ |
bffbf940 JJ |
5164 | if (val == 0x4c) |
5165 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 5166 | contents + roff - 3); |
4a4c5f25 L |
5167 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5168 | bfd_put_8 (output_bfd, 0x45, | |
5169 | contents + roff - 3); | |
bffbf940 | 5170 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 5171 | contents + roff - 2); |
bffbf940 | 5172 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 5173 | contents + roff - 1); |
bffbf940 | 5174 | } |
eb4ff4d6 | 5175 | bfd_put_32 (output_bfd, |
351f65ca | 5176 | elf_x86_64_tpoff (info, relocation), |
142411ca | 5177 | contents + roff); |
bffbf940 JJ |
5178 | continue; |
5179 | } | |
142411ca L |
5180 | else |
5181 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
5182 | } |
5183 | ||
6de2ae4a | 5184 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
5185 | abort (); |
5186 | ||
5187 | if (h != NULL) | |
67a4f2b7 AO |
5188 | { |
5189 | off = h->got.offset; | |
351f65ca | 5190 | offplt = elf_x86_64_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 5191 | } |
bffbf940 JJ |
5192 | else |
5193 | { | |
5194 | if (local_got_offsets == NULL) | |
5195 | abort (); | |
5196 | ||
5197 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 5198 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
5199 | } |
5200 | ||
5201 | if ((off & 1) != 0) | |
5202 | off &= ~1; | |
26e41594 | 5203 | else |
bffbf940 JJ |
5204 | { |
5205 | Elf_Internal_Rela outrel; | |
bffbf940 | 5206 | int dr_type, indx; |
67a4f2b7 | 5207 | asection *sreloc; |
bffbf940 | 5208 | |
6de2ae4a | 5209 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
5210 | abort (); |
5211 | ||
67a4f2b7 AO |
5212 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
5213 | ||
5214 | if (GOT_TLS_GDESC_P (tls_type)) | |
5215 | { | |
351f65ca | 5216 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 5217 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
5218 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
5219 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
5220 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
5221 | + offplt |
5222 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 5223 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 5224 | if (indx == 0) |
351f65ca | 5225 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
67a4f2b7 AO |
5226 | else |
5227 | outrel.r_addend = 0; | |
351f65ca | 5228 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
5229 | } |
5230 | ||
6de2ae4a | 5231 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 5232 | |
6de2ae4a L |
5233 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5234 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 5235 | |
67a4f2b7 | 5236 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 5237 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
5238 | else if (GOT_TLS_GDESC_P (tls_type)) |
5239 | goto dr_done; | |
bffbf940 JJ |
5240 | else |
5241 | dr_type = R_X86_64_TPOFF64; | |
5242 | ||
6de2ae4a | 5243 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 5244 | outrel.r_addend = 0; |
67a4f2b7 AO |
5245 | if ((dr_type == R_X86_64_TPOFF64 |
5246 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
351f65ca L |
5247 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
5248 | outrel.r_info = htab->r_info (indx, dr_type); | |
bffbf940 | 5249 | |
351f65ca | 5250 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 5251 | |
67a4f2b7 | 5252 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
5253 | { |
5254 | if (indx == 0) | |
5255 | { | |
d40d037c | 5256 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 5257 | bfd_put_64 (output_bfd, |
351f65ca | 5258 | relocation - elf_x86_64_dtpoff_base (info), |
6de2ae4a | 5259 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
5260 | } |
5261 | else | |
5262 | { | |
5263 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5264 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5265 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
5266 | R_X86_64_DTPOFF64); |
5267 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 5268 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 5269 | &outrel); |
bffbf940 JJ |
5270 | } |
5271 | } | |
5272 | ||
67a4f2b7 | 5273 | dr_done: |
bffbf940 JJ |
5274 | if (h != NULL) |
5275 | h->got.offset |= 1; | |
5276 | else | |
5277 | local_got_offsets[r_symndx] |= 1; | |
5278 | } | |
5279 | ||
67a4f2b7 AO |
5280 | if (off >= (bfd_vma) -2 |
5281 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 5282 | abort (); |
351f65ca | 5283 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 5284 | { |
67a4f2b7 AO |
5285 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
5286 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
5287 | relocation = htab->elf.sgotplt->output_section->vma |
5288 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
5289 | + offplt + htab->sgotplt_jump_table_size; |
5290 | else | |
6de2ae4a L |
5291 | relocation = htab->elf.sgot->output_section->vma |
5292 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5293 | unresolved_reloc = FALSE; |
bffbf940 | 5294 | } |
142411ca | 5295 | else |
67a4f2b7 | 5296 | { |
142411ca | 5297 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 5298 | |
351f65ca | 5299 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 5300 | { |
52bc799a | 5301 | /* GD->IE transition. For 64bit, change |
e2cbcd91 L |
5302 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
5303 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5304 | or | |
5305 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
5306 | .byte 0x66; rex64 | |
5307 | call *__tls_get_addr@GOTPCREL(%rip | |
5308 | which may be converted to | |
5309 | addr32 call __tls_get_addr | |
52bc799a | 5310 | into: |
e2cbcd91 L |
5311 | movq %fs:0, %rax |
5312 | addq foo@gottpoff(%rip), %rax | |
52bc799a | 5313 | For 32bit, change |
e2cbcd91 L |
5314 | leaq foo@tlsgd(%rip), %rdi |
5315 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5316 | or | |
5317 | leaq foo@tlsgd(%rip), %rdi | |
5318 | .byte 0x66; rex64; | |
5319 | call *__tls_get_addr@GOTPCREL(%rip) | |
5320 | which may be converted to | |
5321 | addr32 call __tls_get_addr | |
52bc799a | 5322 | into: |
e2cbcd91 L |
5323 | movl %fs:0, %eax |
5324 | addq foo@gottpoff(%rip), %rax | |
5c98a14e | 5325 | For largepic, change: |
e2cbcd91 L |
5326 | leaq foo@tlsgd(%rip), %rdi |
5327 | movabsq $__tls_get_addr@pltoff, %rax | |
5328 | addq %r15, %rax | |
5329 | call *%rax | |
5c98a14e | 5330 | into: |
e2cbcd91 L |
5331 | movq %fs:0, %rax |
5332 | addq foo@gottpoff(%rax), %rax | |
5333 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 5334 | int largepic = 0; |
e2cbcd91 | 5335 | if (ABI_64_P (output_bfd)) |
5c98a14e | 5336 | { |
e2cbcd91 L |
5337 | if (contents[roff + 5] == 0xb8) |
5338 | { | |
5339 | memcpy (contents + roff - 3, | |
5340 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
5341 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
5342 | largepic = 1; | |
5343 | } | |
5344 | else | |
5345 | memcpy (contents + roff - 4, | |
5346 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
5347 | 16); | |
5c98a14e | 5348 | } |
52bc799a L |
5349 | else |
5350 | memcpy (contents + roff - 3, | |
5351 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
5352 | 15); | |
142411ca | 5353 | |
6de2ae4a L |
5354 | relocation = (htab->elf.sgot->output_section->vma |
5355 | + htab->elf.sgot->output_offset + off | |
142411ca | 5356 | - roff |
5c98a14e | 5357 | - largepic |
142411ca L |
5358 | - input_section->output_section->vma |
5359 | - input_section->output_offset | |
5360 | - 12); | |
5361 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
5362 | contents + roff + 8 + largepic); |
5363 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 5364 | rel++; |
60f2e42e | 5365 | wrel++; |
142411ca L |
5366 | continue; |
5367 | } | |
351f65ca | 5368 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
5369 | { |
5370 | /* GDesc -> IE transition. | |
5371 | It's originally something like: | |
5372 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 5373 | |
142411ca | 5374 | Change it to: |
c9736ba0 | 5375 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 5376 | |
142411ca L |
5377 | /* Now modify the instruction as appropriate. To |
5378 | turn a leaq into a movq in the form we use it, it | |
5379 | suffices to change the second byte from 0x8d to | |
5380 | 0x8b. */ | |
5381 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
5382 | ||
5383 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
5384 | htab->elf.sgot->output_section->vma |
5385 | + htab->elf.sgot->output_offset + off | |
142411ca L |
5386 | - rel->r_offset |
5387 | - input_section->output_section->vma | |
5388 | - input_section->output_offset | |
5389 | - 4, | |
5390 | contents + roff); | |
5391 | continue; | |
5392 | } | |
351f65ca | 5393 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
5394 | { |
5395 | /* GDesc -> IE transition. | |
5396 | It's originally: | |
5397 | call *(%rax) | |
5398 | ||
5399 | Change it to: | |
c9736ba0 | 5400 | xchg %ax, %ax. */ |
142411ca | 5401 | |
142411ca L |
5402 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
5403 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
5404 | continue; | |
5405 | } | |
5406 | else | |
5407 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 5408 | } |
bffbf940 JJ |
5409 | break; |
5410 | ||
5411 | case R_X86_64_TLSLD: | |
351f65ca L |
5412 | if (! elf_x86_64_tls_transition (info, input_bfd, |
5413 | input_section, contents, | |
5414 | symtab_hdr, sym_hashes, | |
bedfd056 L |
5415 | &r_type, GOT_UNKNOWN, rel, |
5416 | relend, h, r_symndx, TRUE)) | |
142411ca | 5417 | return FALSE; |
a3fadc9a | 5418 | |
142411ca L |
5419 | if (r_type != R_X86_64_TLSLD) |
5420 | { | |
bffbf940 | 5421 | /* LD->LE transition: |
e2cbcd91 L |
5422 | leaq foo@tlsld(%rip), %rdi |
5423 | call __tls_get_addr@PLT | |
5424 | For 64bit, we change it into: | |
5425 | .word 0x6666; .byte 0x66; movq %fs:0, %rax | |
5426 | For 32bit, we change it into: | |
5427 | nopl 0x0(%rax); movl %fs:0, %eax | |
5428 | Or | |
5429 | leaq foo@tlsld(%rip), %rdi; | |
5430 | call *__tls_get_addr@GOTPCREL(%rip) | |
5431 | which may be converted to | |
5432 | addr32 call __tls_get_addr | |
52bc799a | 5433 | For 64bit, we change it into: |
e2cbcd91 | 5434 | .word 0x6666; .word 0x6666; movq %fs:0, %rax |
52bc799a | 5435 | For 32bit, we change it into: |
e2cbcd91 | 5436 | nopw 0x0(%rax); movl %fs:0, %eax |
5c98a14e | 5437 | For largepic, change: |
e2cbcd91 L |
5438 | leaq foo@tlsgd(%rip), %rdi |
5439 | movabsq $__tls_get_addr@pltoff, %rax | |
5440 | addq %rbx, %rax | |
5441 | call *%rax | |
5442 | into | |
5443 | data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
5444 | movq %fs:0, %eax */ | |
142411ca L |
5445 | |
5446 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
e2cbcd91 L |
5447 | if (ABI_64_P (output_bfd)) |
5448 | { | |
5449 | if (contents[rel->r_offset + 5] == 0xb8) | |
5450 | memcpy (contents + rel->r_offset - 3, | |
5451 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
5452 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
5453 | else if (contents[rel->r_offset + 4] == 0xff | |
5454 | || contents[rel->r_offset + 4] == 0x67) | |
5455 | memcpy (contents + rel->r_offset - 3, | |
5456 | "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", | |
5457 | 13); | |
5458 | else | |
5459 | memcpy (contents + rel->r_offset - 3, | |
5460 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
5461 | } | |
52bc799a | 5462 | else |
e2cbcd91 L |
5463 | { |
5464 | if (contents[rel->r_offset + 4] == 0xff) | |
5465 | memcpy (contents + rel->r_offset - 3, | |
5466 | "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", | |
5467 | 13); | |
5468 | else | |
5469 | memcpy (contents + rel->r_offset - 3, | |
5470 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
5471 | } | |
5472 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX | |
5473 | and R_X86_64_PLTOFF64. */ | |
bffbf940 | 5474 | rel++; |
60f2e42e | 5475 | wrel++; |
bffbf940 JJ |
5476 | continue; |
5477 | } | |
5478 | ||
6de2ae4a | 5479 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
5480 | abort (); |
5481 | ||
5482 | off = htab->tls_ld_got.offset; | |
5483 | if (off & 1) | |
5484 | off &= ~1; | |
5485 | else | |
5486 | { | |
5487 | Elf_Internal_Rela outrel; | |
bffbf940 | 5488 | |
6de2ae4a | 5489 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
5490 | abort (); |
5491 | ||
6de2ae4a L |
5492 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5493 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
5494 | |
5495 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5496 | htab->elf.sgot->contents + off); |
bffbf940 | 5497 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 5498 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5499 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 5500 | outrel.r_addend = 0; |
351f65ca | 5501 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 5502 | &outrel); |
bffbf940 JJ |
5503 | htab->tls_ld_got.offset |= 1; |
5504 | } | |
6de2ae4a L |
5505 | relocation = htab->elf.sgot->output_section->vma |
5506 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5507 | unresolved_reloc = FALSE; |
bffbf940 JJ |
5508 | break; |
5509 | ||
5510 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
5511 | if (!bfd_link_executable (info) |
5512 | || (input_section->flags & SEC_CODE) == 0) | |
351f65ca | 5513 | relocation -= elf_x86_64_dtpoff_base (info); |
bffbf940 | 5514 | else |
351f65ca | 5515 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5516 | break; |
5517 | ||
5518 | case R_X86_64_TPOFF32: | |
6769d501 | 5519 | case R_X86_64_TPOFF64: |
0e1862bb | 5520 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 5521 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5522 | break; |
5523 | ||
a69ed7f7 L |
5524 | case R_X86_64_DTPOFF64: |
5525 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
5526 | relocation -= elf_x86_64_dtpoff_base (info); | |
5527 | break; | |
5528 | ||
70256ad8 AJ |
5529 | default: |
5530 | break; | |
5531 | } | |
8d88c4ca | 5532 | |
239e1f3a AM |
5533 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
5534 | because such sections are not SEC_ALLOC and thus ld.so will | |
5535 | not process them. */ | |
c434dee6 | 5536 | if (unresolved_reloc |
239e1f3a | 5537 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
5538 | && h->def_dynamic) |
5539 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
5540 | rel->r_offset) != (bfd_vma) -1) | |
a040981f L |
5541 | { |
5542 | (*_bfd_error_handler) | |
5543 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), | |
5544 | input_bfd, | |
5545 | input_section, | |
5546 | (long) rel->r_offset, | |
5547 | howto->name, | |
5548 | h->root.root.string); | |
5549 | return FALSE; | |
5550 | } | |
c434dee6 | 5551 | |
cbe950e9 | 5552 | do_relocation: |
8d88c4ca | 5553 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
5554 | contents, rel->r_offset, |
5555 | relocation, rel->r_addend); | |
8d88c4ca | 5556 | |
62d78908 | 5557 | check_relocation_error: |
8d88c4ca | 5558 | if (r != bfd_reloc_ok) |
8da6118f | 5559 | { |
c434dee6 AJ |
5560 | const char *name; |
5561 | ||
5562 | if (h != NULL) | |
5563 | name = h->root.root.string; | |
5564 | else | |
8da6118f | 5565 | { |
c434dee6 AJ |
5566 | name = bfd_elf_string_from_elf_section (input_bfd, |
5567 | symtab_hdr->sh_link, | |
5568 | sym->st_name); | |
5569 | if (name == NULL) | |
b34976b6 | 5570 | return FALSE; |
c434dee6 AJ |
5571 | if (*name == '\0') |
5572 | name = bfd_section_name (input_bfd, sec); | |
5573 | } | |
5574 | ||
5575 | if (r == bfd_reloc_overflow) | |
1a72702b AM |
5576 | (*info->callbacks->reloc_overflow) |
5577 | (info, (h ? &h->root : NULL), name, howto->name, | |
5578 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
c434dee6 AJ |
5579 | else |
5580 | { | |
5581 | (*_bfd_error_handler) | |
bb95161d | 5582 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
d003868e | 5583 | input_bfd, input_section, |
c434dee6 | 5584 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 5585 | return FALSE; |
8da6118f KH |
5586 | } |
5587 | } | |
60f2e42e L |
5588 | |
5589 | if (wrel != rel) | |
5590 | *wrel = *rel; | |
5591 | } | |
5592 | ||
5593 | if (wrel != rel) | |
5594 | { | |
5595 | Elf_Internal_Shdr *rel_hdr; | |
5596 | size_t deleted = rel - wrel; | |
5597 | ||
5598 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
5599 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5600 | if (rel_hdr->sh_size == 0) | |
5601 | { | |
5602 | /* It is too late to remove an empty reloc section. Leave | |
5603 | one NONE reloc. | |
5604 | ??? What is wrong with an empty section??? */ | |
5605 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
5606 | deleted -= 1; | |
5607 | } | |
5608 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
5609 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5610 | input_section->reloc_count -= deleted; | |
8d88c4ca | 5611 | } |
70256ad8 | 5612 | |
b34976b6 | 5613 | return TRUE; |
70256ad8 AJ |
5614 | } |
5615 | ||
5616 | /* Finish up dynamic symbol handling. We set the contents of various | |
5617 | dynamic sections here. */ | |
5618 | ||
b34976b6 | 5619 | static bfd_boolean |
351f65ca L |
5620 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
5621 | struct bfd_link_info *info, | |
5622 | struct elf_link_hash_entry *h, | |
aec6b87e | 5623 | Elf_Internal_Sym *sym) |
70256ad8 | 5624 | { |
351f65ca | 5625 | struct elf_x86_64_link_hash_table *htab; |
0ff2b86e L |
5626 | const struct elf_x86_64_backend_data *abed; |
5627 | bfd_boolean use_plt_bnd; | |
dd7e64d4 | 5628 | struct elf_x86_64_link_hash_entry *eh; |
aec6b87e | 5629 | bfd_boolean local_undefweak; |
70256ad8 | 5630 | |
351f65ca | 5631 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
5632 | if (htab == NULL) |
5633 | return FALSE; | |
70256ad8 | 5634 | |
0ff2b86e L |
5635 | /* Use MPX backend data in case of BND relocation. Use .plt_bnd |
5636 | section only if there is .plt section. */ | |
5637 | use_plt_bnd = htab->elf.splt != NULL && htab->plt_bnd != NULL; | |
5638 | abed = (use_plt_bnd | |
5639 | ? &elf_x86_64_bnd_arch_bed | |
5640 | : get_elf_x86_64_backend_data (output_bfd)); | |
5641 | ||
dd7e64d4 L |
5642 | eh = (struct elf_x86_64_link_hash_entry *) h; |
5643 | ||
aec6b87e L |
5644 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
5645 | resolved undefined weak symbols in executable so that their | |
5646 | references have value 0 at run-time. */ | |
e62b9723 L |
5647 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
5648 | eh->has_got_reloc, | |
5649 | eh); | |
aec6b87e | 5650 | |
70256ad8 AJ |
5651 | if (h->plt.offset != (bfd_vma) -1) |
5652 | { | |
70256ad8 | 5653 | bfd_vma plt_index; |
0ff2b86e L |
5654 | bfd_vma got_offset, plt_offset, plt_plt_offset, plt_got_offset; |
5655 | bfd_vma plt_plt_insn_end, plt_got_insn_size; | |
70256ad8 | 5656 | Elf_Internal_Rela rela; |
947216bf | 5657 | bfd_byte *loc; |
0ff2b86e | 5658 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 5659 | const struct elf_backend_data *bed; |
5974eba6 | 5660 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
5661 | |
5662 | /* When building a static executable, use .iplt, .igot.plt and | |
5663 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 5664 | if (htab->elf.splt != NULL) |
cbe950e9 | 5665 | { |
6de2ae4a L |
5666 | plt = htab->elf.splt; |
5667 | gotplt = htab->elf.sgotplt; | |
5668 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
5669 | } |
5670 | else | |
5671 | { | |
6de2ae4a L |
5672 | plt = htab->elf.iplt; |
5673 | gotplt = htab->elf.igotplt; | |
5674 | relplt = htab->elf.irelplt; | |
cbe950e9 | 5675 | } |
70256ad8 AJ |
5676 | |
5677 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 5678 | it up. */ |
cbe950e9 | 5679 | if ((h->dynindx == -1 |
aec6b87e | 5680 | && !local_undefweak |
0e1862bb | 5681 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
5682 | && h->def_regular |
5683 | && h->type == STT_GNU_IFUNC)) | |
5684 | || plt == NULL | |
5685 | || gotplt == NULL | |
5686 | || relplt == NULL) | |
cec7f46a | 5687 | abort (); |
70256ad8 AJ |
5688 | |
5689 | /* Get the index in the procedure linkage table which | |
5690 | corresponds to this symbol. This is the index of this symbol | |
5691 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 5692 | first entry in the procedure linkage table is reserved. |
6bbec505 | 5693 | |
cbe950e9 | 5694 | Get the offset into the .got table of the entry that |
407443a3 | 5695 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
5696 | bytes. The first three are reserved for the dynamic linker. |
5697 | ||
5698 | For static executables, we don't reserve anything. */ | |
5699 | ||
6de2ae4a | 5700 | if (plt == htab->elf.splt) |
cbe950e9 | 5701 | { |
eed180f8 | 5702 | got_offset = h->plt.offset / abed->plt_entry_size - 1; |
e1f98742 | 5703 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
5704 | } |
5705 | else | |
5706 | { | |
eed180f8 | 5707 | got_offset = h->plt.offset / abed->plt_entry_size; |
e1f98742 | 5708 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 5709 | } |
70256ad8 | 5710 | |
0ff2b86e L |
5711 | plt_plt_insn_end = abed->plt_plt_insn_end; |
5712 | plt_plt_offset = abed->plt_plt_offset; | |
5713 | plt_got_insn_size = abed->plt_got_insn_size; | |
5714 | plt_got_offset = abed->plt_got_offset; | |
5715 | if (use_plt_bnd) | |
5716 | { | |
5717 | /* Use the second PLT with BND relocations. */ | |
5718 | const bfd_byte *plt_entry, *plt2_entry; | |
0ff2b86e L |
5719 | |
5720 | if (eh->has_bnd_reloc) | |
5721 | { | |
5722 | plt_entry = elf_x86_64_bnd_plt_entry; | |
5723 | plt2_entry = elf_x86_64_bnd_plt2_entry; | |
5724 | } | |
5725 | else | |
5726 | { | |
5727 | plt_entry = elf_x86_64_legacy_plt_entry; | |
5728 | plt2_entry = elf_x86_64_legacy_plt2_entry; | |
5729 | ||
5730 | /* Subtract 1 since there is no BND prefix. */ | |
5731 | plt_plt_insn_end -= 1; | |
5732 | plt_plt_offset -= 1; | |
5733 | plt_got_insn_size -= 1; | |
5734 | plt_got_offset -= 1; | |
5735 | } | |
5736 | ||
5737 | BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry) | |
5738 | == sizeof (elf_x86_64_legacy_plt_entry)); | |
5739 | ||
5740 | /* Fill in the entry in the procedure linkage table. */ | |
5741 | memcpy (plt->contents + h->plt.offset, | |
5742 | plt_entry, sizeof (elf_x86_64_legacy_plt_entry)); | |
5743 | /* Fill in the entry in the second PLT. */ | |
5744 | memcpy (htab->plt_bnd->contents + eh->plt_bnd.offset, | |
5745 | plt2_entry, sizeof (elf_x86_64_legacy_plt2_entry)); | |
5746 | ||
5747 | resolved_plt = htab->plt_bnd; | |
5748 | plt_offset = eh->plt_bnd.offset; | |
5749 | } | |
5750 | else | |
5751 | { | |
5752 | /* Fill in the entry in the procedure linkage table. */ | |
5753 | memcpy (plt->contents + h->plt.offset, abed->plt_entry, | |
5754 | abed->plt_entry_size); | |
5755 | ||
5756 | resolved_plt = plt; | |
5757 | plt_offset = h->plt.offset; | |
5758 | } | |
eed180f8 RM |
5759 | |
5760 | /* Insert the relocation positions of the plt section. */ | |
5761 | ||
5762 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
5763 | subtracting the size of that instruction. */ | |
ab7fede8 L |
5764 | plt_got_pcrel_offset = (gotplt->output_section->vma |
5765 | + gotplt->output_offset | |
5766 | + got_offset | |
5767 | - resolved_plt->output_section->vma | |
5768 | - resolved_plt->output_offset | |
5769 | - plt_offset | |
5770 | - plt_got_insn_size); | |
5771 | ||
5772 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 5773 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
ab7fede8 L |
5774 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"), |
5775 | output_bfd, h->root.root.string); | |
5776 | ||
5777 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
0ff2b86e | 5778 | resolved_plt->contents + plt_offset + plt_got_offset); |
cbe950e9 | 5779 | |
653165cc | 5780 | /* Fill in the entry in the global offset table, initially this |
aec6b87e L |
5781 | points to the second part of the PLT entry. Leave the entry |
5782 | as zero for undefined weak symbol in PIE. No PLT relocation | |
5783 | against undefined weak symbol in PIE. */ | |
5784 | if (!local_undefweak) | |
cbe950e9 | 5785 | { |
aec6b87e L |
5786 | bfd_put_64 (output_bfd, (plt->output_section->vma |
5787 | + plt->output_offset | |
5788 | + h->plt.offset | |
5789 | + abed->plt_lazy_offset), | |
5790 | gotplt->contents + got_offset); | |
5791 | ||
5792 | /* Fill in the entry in the .rela.plt section. */ | |
5793 | rela.r_offset = (gotplt->output_section->vma | |
5794 | + gotplt->output_offset | |
5795 | + got_offset); | |
5796 | if (h->dynindx == -1 | |
5797 | || ((bfd_link_executable (info) | |
5798 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
5799 | && h->def_regular | |
5800 | && h->type == STT_GNU_IFUNC)) | |
5801 | { | |
5802 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
5803 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
5804 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); | |
5805 | rela.r_addend = (h->root.u.def.value | |
5806 | + h->root.u.def.section->output_section->vma | |
5807 | + h->root.u.def.section->output_offset); | |
5808 | /* R_X86_64_IRELATIVE comes last. */ | |
5809 | plt_index = htab->next_irelative_index--; | |
5810 | } | |
5811 | else | |
5812 | { | |
5813 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); | |
5814 | rela.r_addend = 0; | |
5815 | plt_index = htab->next_jump_slot_index++; | |
5816 | } | |
e1f98742 | 5817 | |
aec6b87e L |
5818 | /* Don't fill PLT entry for static executables. */ |
5819 | if (plt == htab->elf.splt) | |
5820 | { | |
5821 | bfd_vma plt0_offset = h->plt.offset + plt_plt_insn_end; | |
5822 | ||
5823 | /* Put relocation index. */ | |
5824 | bfd_put_32 (output_bfd, plt_index, | |
5825 | (plt->contents + h->plt.offset | |
5826 | + abed->plt_reloc_offset)); | |
5827 | ||
5828 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
5829 | check relocation index for overflow since branch displacement | |
5830 | will overflow first. */ | |
5831 | if (plt0_offset > 0x80000000) | |
5832 | info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"), | |
5833 | output_bfd, h->root.root.string); | |
5834 | bfd_put_32 (output_bfd, - plt0_offset, | |
5835 | plt->contents + h->plt.offset + plt_plt_offset); | |
5836 | } | |
351f65ca | 5837 | |
aec6b87e L |
5838 | bed = get_elf_backend_data (output_bfd); |
5839 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
5840 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
5841 | } | |
dd7e64d4 L |
5842 | } |
5843 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
5844 | { | |
5845 | bfd_vma got_offset, plt_offset, plt_got_offset, plt_got_insn_size; | |
5846 | asection *plt, *got; | |
5847 | bfd_boolean got_after_plt; | |
5848 | int32_t got_pcrel_offset; | |
5849 | const bfd_byte *got_plt_entry; | |
5850 | ||
5851 | /* Set the entry in the GOT procedure linkage table. */ | |
5852 | plt = htab->plt_got; | |
5853 | got = htab->elf.sgot; | |
5854 | got_offset = h->got.offset; | |
5855 | ||
5856 | if (got_offset == (bfd_vma) -1 | |
5857 | || h->type == STT_GNU_IFUNC | |
5858 | || plt == NULL | |
5859 | || got == NULL) | |
5860 | abort (); | |
70256ad8 | 5861 | |
dd7e64d4 L |
5862 | /* Use the second PLT entry template for the GOT PLT since they |
5863 | are the identical. */ | |
5864 | plt_got_insn_size = elf_x86_64_bnd_arch_bed.plt_got_insn_size; | |
5865 | plt_got_offset = elf_x86_64_bnd_arch_bed.plt_got_offset; | |
5866 | if (eh->has_bnd_reloc) | |
5867 | got_plt_entry = elf_x86_64_bnd_plt2_entry; | |
5868 | else | |
70256ad8 | 5869 | { |
dd7e64d4 L |
5870 | got_plt_entry = elf_x86_64_legacy_plt2_entry; |
5871 | ||
5872 | /* Subtract 1 since there is no BND prefix. */ | |
5873 | plt_got_insn_size -= 1; | |
5874 | plt_got_offset -= 1; | |
70256ad8 | 5875 | } |
dd7e64d4 L |
5876 | |
5877 | /* Fill in the entry in the GOT procedure linkage table. */ | |
5878 | plt_offset = eh->plt_got.offset; | |
5879 | memcpy (plt->contents + plt_offset, | |
5880 | got_plt_entry, sizeof (elf_x86_64_legacy_plt2_entry)); | |
5881 | ||
5882 | /* Put offset the PC-relative instruction referring to the GOT | |
5883 | entry, subtracting the size of that instruction. */ | |
5884 | got_pcrel_offset = (got->output_section->vma | |
5885 | + got->output_offset | |
5886 | + got_offset | |
5887 | - plt->output_section->vma | |
5888 | - plt->output_offset | |
5889 | - plt_offset | |
5890 | - plt_got_insn_size); | |
5891 | ||
5892 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
5893 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
5894 | if ((got_after_plt && got_pcrel_offset < 0) | |
5895 | || (!got_after_plt && got_pcrel_offset > 0)) | |
5896 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"), | |
5897 | output_bfd, h->root.root.string); | |
5898 | ||
5899 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
5900 | plt->contents + plt_offset + plt_got_offset); | |
5901 | } | |
5902 | ||
aec6b87e L |
5903 | if (!local_undefweak |
5904 | && !h->def_regular | |
dd7e64d4 L |
5905 | && (h->plt.offset != (bfd_vma) -1 |
5906 | || eh->plt_got.offset != (bfd_vma) -1)) | |
5907 | { | |
5908 | /* Mark the symbol as undefined, rather than as defined in | |
5909 | the .plt section. Leave the value if there were any | |
5910 | relocations where pointer equality matters (this is a clue | |
5911 | for the dynamic linker, to make function pointer | |
5912 | comparisons work between an application and shared | |
5913 | library), otherwise set it to zero. If a function is only | |
5914 | called from a binary, there is no need to slow down | |
5915 | shared libraries because of that. */ | |
5916 | sym->st_shndx = SHN_UNDEF; | |
5917 | if (!h->pointer_equality_needed) | |
5918 | sym->st_value = 0; | |
70256ad8 AJ |
5919 | } |
5920 | ||
aec6b87e L |
5921 | /* Don't generate dynamic GOT relocation against undefined weak |
5922 | symbol in executable. */ | |
bffbf940 | 5923 | if (h->got.offset != (bfd_vma) -1 |
351f65ca | 5924 | && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type) |
aec6b87e L |
5925 | && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE |
5926 | && !local_undefweak) | |
053579d7 | 5927 | { |
053579d7 | 5928 | Elf_Internal_Rela rela; |
233cc9c1 | 5929 | asection *relgot = htab->elf.srelgot; |
053579d7 AJ |
5930 | |
5931 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 5932 | up. */ |
6de2ae4a | 5933 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 5934 | abort (); |
053579d7 | 5935 | |
6de2ae4a L |
5936 | rela.r_offset = (htab->elf.sgot->output_section->vma |
5937 | + htab->elf.sgot->output_offset | |
dc810e39 | 5938 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
5939 | |
5940 | /* If this is a static link, or it is a -Bsymbolic link and the | |
5941 | symbol is defined locally or was forced to be local because | |
5942 | of a version file, we just want to emit a RELATIVE reloc. | |
5943 | The entry in the global offset table will already have been | |
5944 | initialized in the relocate_section function. */ | |
710ab287 | 5945 | if (h->def_regular |
0018b0a3 L |
5946 | && h->type == STT_GNU_IFUNC) |
5947 | { | |
233cc9c1 L |
5948 | if (h->plt.offset == (bfd_vma) -1) |
5949 | { | |
5950 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
5951 | if (htab->elf.splt == NULL) | |
5952 | { | |
5953 | /* use .rel[a].iplt section to store .got relocations | |
5954 | in static executable. */ | |
5955 | relgot = htab->elf.irelplt; | |
5956 | } | |
5957 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
5958 | { | |
5959 | rela.r_info = htab->r_info (0, | |
5960 | R_X86_64_IRELATIVE); | |
5961 | rela.r_addend = (h->root.u.def.value | |
5962 | + h->root.u.def.section->output_section->vma | |
5963 | + h->root.u.def.section->output_offset); | |
5964 | } | |
5965 | else | |
5966 | goto do_glob_dat; | |
5967 | } | |
5968 | else if (bfd_link_pic (info)) | |
710ab287 L |
5969 | { |
5970 | /* Generate R_X86_64_GLOB_DAT. */ | |
5971 | goto do_glob_dat; | |
5972 | } | |
5973 | else | |
5974 | { | |
90d60710 L |
5975 | asection *plt; |
5976 | ||
710ab287 L |
5977 | if (!h->pointer_equality_needed) |
5978 | abort (); | |
5979 | ||
5980 | /* For non-shared object, we can't use .got.plt, which | |
5981 | contains the real function addres if we need pointer | |
5982 | equality. We load the GOT entry with the PLT entry. */ | |
90d60710 | 5983 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
5984 | bfd_put_64 (output_bfd, (plt->output_section->vma |
5985 | + plt->output_offset | |
5986 | + h->plt.offset), | |
6de2ae4a | 5987 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
5988 | return TRUE; |
5989 | } | |
0018b0a3 | 5990 | } |
0e1862bb | 5991 | else if (bfd_link_pic (info) |
0018b0a3 | 5992 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
053579d7 | 5993 | { |
41bed6dd L |
5994 | if (!h->def_regular) |
5995 | return FALSE; | |
cc78d0af | 5996 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 5997 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
5998 | rela.r_addend = (h->root.u.def.value |
5999 | + h->root.u.def.section->output_section->vma | |
6000 | + h->root.u.def.section->output_offset); | |
6001 | } | |
6002 | else | |
6003 | { | |
6004 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 6005 | do_glob_dat: |
c434dee6 | 6006 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 6007 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 6008 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
6009 | rela.r_addend = 0; |
6010 | } | |
6011 | ||
233cc9c1 | 6012 | elf_append_rela (output_bfd, relgot, &rela); |
053579d7 AJ |
6013 | } |
6014 | ||
f5385ebf | 6015 | if (h->needs_copy) |
70256ad8 | 6016 | { |
70256ad8 AJ |
6017 | Elf_Internal_Rela rela; |
6018 | ||
6019 | /* This symbol needs a copy reloc. Set it up. */ | |
6020 | ||
c434dee6 AJ |
6021 | if (h->dynindx == -1 |
6022 | || (h->root.type != bfd_link_hash_defined | |
6023 | && h->root.type != bfd_link_hash_defweak) | |
6024 | || htab->srelbss == NULL) | |
6025 | abort (); | |
70256ad8 AJ |
6026 | |
6027 | rela.r_offset = (h->root.u.def.value | |
6028 | + h->root.u.def.section->output_section->vma | |
6029 | + h->root.u.def.section->output_offset); | |
351f65ca | 6030 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 6031 | rela.r_addend = 0; |
351f65ca | 6032 | elf_append_rela (output_bfd, htab->srelbss, &rela); |
70256ad8 AJ |
6033 | } |
6034 | ||
b34976b6 | 6035 | return TRUE; |
70256ad8 AJ |
6036 | } |
6037 | ||
c25bc9fc L |
6038 | /* Finish up local dynamic symbol handling. We set the contents of |
6039 | various dynamic sections here. */ | |
6040 | ||
6041 | static bfd_boolean | |
351f65ca | 6042 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
6043 | { |
6044 | struct elf_link_hash_entry *h | |
6045 | = (struct elf_link_hash_entry *) *slot; | |
6046 | struct bfd_link_info *info | |
eed180f8 | 6047 | = (struct bfd_link_info *) inf; |
c25bc9fc | 6048 | |
351f65ca | 6049 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
c25bc9fc L |
6050 | info, h, NULL); |
6051 | } | |
6052 | ||
aec6b87e L |
6053 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
6054 | here since undefined weak symbol may not be dynamic and may not be | |
6055 | called for elf_x86_64_finish_dynamic_symbol. */ | |
6056 | ||
6057 | static bfd_boolean | |
6058 | elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
6059 | void *inf) | |
6060 | { | |
6061 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
6062 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
6063 | ||
6064 | if (h->root.type != bfd_link_hash_undefweak | |
6065 | || h->dynindx != -1) | |
6066 | return TRUE; | |
6067 | ||
6068 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, | |
6069 | info, h, NULL); | |
6070 | } | |
6071 | ||
c434dee6 AJ |
6072 | /* Used to decide how to sort relocs in an optimal manner for the |
6073 | dynamic linker, before writing them out. */ | |
6074 | ||
6075 | static enum elf_reloc_type_class | |
cae1fbbb | 6076 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
6077 | const asection *rel_sec ATTRIBUTE_UNUSED, |
6078 | const Elf_Internal_Rela *rela) | |
c434dee6 | 6079 | { |
cae1fbbb L |
6080 | bfd *abfd = info->output_bfd; |
6081 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
6082 | struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info); | |
cae1fbbb | 6083 | |
d9e3b590 L |
6084 | if (htab->elf.dynsym != NULL |
6085 | && htab->elf.dynsym->contents != NULL) | |
6086 | { | |
6087 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
6088 | dynamic symbols. */ | |
6089 | unsigned long r_symndx = htab->r_sym (rela->r_info); | |
897463b1 L |
6090 | if (r_symndx != STN_UNDEF) |
6091 | { | |
6092 | Elf_Internal_Sym sym; | |
6093 | if (!bed->s->swap_symbol_in (abfd, | |
6094 | (htab->elf.dynsym->contents | |
6095 | + r_symndx * bed->s->sizeof_sym), | |
6096 | 0, &sym)) | |
6097 | abort (); | |
d9e3b590 | 6098 | |
897463b1 L |
6099 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
6100 | return reloc_class_ifunc; | |
6101 | } | |
d9e3b590 | 6102 | } |
cae1fbbb | 6103 | |
351f65ca | 6104 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 | 6105 | { |
c428ce9d L |
6106 | case R_X86_64_IRELATIVE: |
6107 | return reloc_class_ifunc; | |
c434dee6 | 6108 | case R_X86_64_RELATIVE: |
1da80baa | 6109 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
6110 | return reloc_class_relative; |
6111 | case R_X86_64_JUMP_SLOT: | |
6112 | return reloc_class_plt; | |
6113 | case R_X86_64_COPY: | |
6114 | return reloc_class_copy; | |
6115 | default: | |
6116 | return reloc_class_normal; | |
6117 | } | |
6118 | } | |
6119 | ||
70256ad8 AJ |
6120 | /* Finish up the dynamic sections. */ |
6121 | ||
b34976b6 | 6122 | static bfd_boolean |
351f65ca L |
6123 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
6124 | struct bfd_link_info *info) | |
70256ad8 | 6125 | { |
351f65ca | 6126 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
6127 | bfd *dynobj; |
6128 | asection *sdyn; | |
0ff2b86e | 6129 | const struct elf_x86_64_backend_data *abed; |
70256ad8 | 6130 | |
351f65ca | 6131 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
6132 | if (htab == NULL) |
6133 | return FALSE; | |
6134 | ||
0ff2b86e L |
6135 | /* Use MPX backend data in case of BND relocation. Use .plt_bnd |
6136 | section only if there is .plt section. */ | |
6137 | abed = (htab->elf.splt != NULL && htab->plt_bnd != NULL | |
6138 | ? &elf_x86_64_bnd_arch_bed | |
6139 | : get_elf_x86_64_backend_data (output_bfd)); | |
6140 | ||
c434dee6 | 6141 | dynobj = htab->elf.dynobj; |
3d4d4302 | 6142 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
70256ad8 | 6143 | |
c434dee6 | 6144 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 6145 | { |
82e96e07 L |
6146 | bfd_byte *dyncon, *dynconend; |
6147 | const struct elf_backend_data *bed; | |
6148 | bfd_size_type sizeof_dyn; | |
70256ad8 | 6149 | |
6de2ae4a | 6150 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 6151 | abort (); |
70256ad8 | 6152 | |
82e96e07 L |
6153 | bed = get_elf_backend_data (dynobj); |
6154 | sizeof_dyn = bed->s->sizeof_dyn; | |
6155 | dyncon = sdyn->contents; | |
6156 | dynconend = sdyn->contents + sdyn->size; | |
6157 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
6158 | { |
6159 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
6160 | asection *s; |
6161 | ||
82e96e07 | 6162 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
6163 | |
6164 | switch (dyn.d_tag) | |
6165 | { | |
6166 | default: | |
053579d7 | 6167 | continue; |
70256ad8 AJ |
6168 | |
6169 | case DT_PLTGOT: | |
6de2ae4a | 6170 | s = htab->elf.sgotplt; |
8c37241b | 6171 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 6172 | break; |
70256ad8 AJ |
6173 | |
6174 | case DT_JMPREL: | |
6de2ae4a | 6175 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 6176 | break; |
70256ad8 | 6177 | |
c434dee6 | 6178 | case DT_PLTRELSZ: |
6de2ae4a | 6179 | s = htab->elf.srelplt->output_section; |
eea6121a | 6180 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
6181 | break; |
6182 | ||
6183 | case DT_RELASZ: | |
c434dee6 AJ |
6184 | /* The procedure linkage table relocs (DT_JMPREL) should |
6185 | not be included in the overall relocs (DT_RELA). | |
6186 | Therefore, we override the DT_RELASZ entry here to | |
6187 | make it not include the JMPREL relocs. Since the | |
6188 | linker script arranges for .rela.plt to follow all | |
6189 | other relocation sections, we don't have to worry | |
6190 | about changing the DT_RELA entry. */ | |
6de2ae4a | 6191 | if (htab->elf.srelplt != NULL) |
70256ad8 | 6192 | { |
6de2ae4a | 6193 | s = htab->elf.srelplt->output_section; |
eea6121a | 6194 | dyn.d_un.d_val -= s->size; |
70256ad8 AJ |
6195 | } |
6196 | break; | |
67a4f2b7 AO |
6197 | |
6198 | case DT_TLSDESC_PLT: | |
6de2ae4a | 6199 | s = htab->elf.splt; |
67a4f2b7 AO |
6200 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
6201 | + htab->tlsdesc_plt; | |
6202 | break; | |
6203 | ||
6204 | case DT_TLSDESC_GOT: | |
6de2ae4a | 6205 | s = htab->elf.sgot; |
67a4f2b7 AO |
6206 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
6207 | + htab->tlsdesc_got; | |
6208 | break; | |
70256ad8 | 6209 | } |
c434dee6 | 6210 | |
82e96e07 | 6211 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
6212 | } |
6213 | ||
c434dee6 | 6214 | /* Fill in the special first entry in the procedure linkage table. */ |
6de2ae4a | 6215 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 6216 | { |
653165cc | 6217 | /* Fill in the first entry in the procedure linkage table. */ |
eed180f8 RM |
6218 | memcpy (htab->elf.splt->contents, |
6219 | abed->plt0_entry, abed->plt_entry_size); | |
653165cc AJ |
6220 | /* Add offset for pushq GOT+8(%rip), since the instruction |
6221 | uses 6 bytes subtract this value. */ | |
6222 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
6223 | (htab->elf.sgotplt->output_section->vma |
6224 | + htab->elf.sgotplt->output_offset | |
653165cc | 6225 | + 8 |
6de2ae4a L |
6226 | - htab->elf.splt->output_section->vma |
6227 | - htab->elf.splt->output_offset | |
653165cc | 6228 | - 6), |
eed180f8 RM |
6229 | htab->elf.splt->contents + abed->plt0_got1_offset); |
6230 | /* Add offset for the PC-relative instruction accessing GOT+16, | |
6231 | subtracting the offset to the end of that instruction. */ | |
653165cc | 6232 | bfd_put_32 (output_bfd, |
6de2ae4a L |
6233 | (htab->elf.sgotplt->output_section->vma |
6234 | + htab->elf.sgotplt->output_offset | |
653165cc | 6235 | + 16 |
6de2ae4a L |
6236 | - htab->elf.splt->output_section->vma |
6237 | - htab->elf.splt->output_offset | |
eed180f8 RM |
6238 | - abed->plt0_got2_insn_end), |
6239 | htab->elf.splt->contents + abed->plt0_got2_offset); | |
653165cc | 6240 | |
eed180f8 RM |
6241 | elf_section_data (htab->elf.splt->output_section) |
6242 | ->this_hdr.sh_entsize = abed->plt_entry_size; | |
67a4f2b7 AO |
6243 | |
6244 | if (htab->tlsdesc_plt) | |
6245 | { | |
6246 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6de2ae4a | 6247 | htab->elf.sgot->contents + htab->tlsdesc_got); |
67a4f2b7 | 6248 | |
6de2ae4a | 6249 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, |
eed180f8 | 6250 | abed->plt0_entry, abed->plt_entry_size); |
67a4f2b7 AO |
6251 | |
6252 | /* Add offset for pushq GOT+8(%rip), since the | |
6253 | instruction uses 6 bytes subtract this value. */ | |
6254 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
6255 | (htab->elf.sgotplt->output_section->vma |
6256 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 6257 | + 8 |
6de2ae4a L |
6258 | - htab->elf.splt->output_section->vma |
6259 | - htab->elf.splt->output_offset | |
67a4f2b7 AO |
6260 | - htab->tlsdesc_plt |
6261 | - 6), | |
eed180f8 RM |
6262 | htab->elf.splt->contents |
6263 | + htab->tlsdesc_plt + abed->plt0_got1_offset); | |
6264 | /* Add offset for the PC-relative instruction accessing GOT+TDG, | |
6265 | where TGD stands for htab->tlsdesc_got, subtracting the offset | |
6266 | to the end of that instruction. */ | |
67a4f2b7 | 6267 | bfd_put_32 (output_bfd, |
6de2ae4a L |
6268 | (htab->elf.sgot->output_section->vma |
6269 | + htab->elf.sgot->output_offset | |
67a4f2b7 | 6270 | + htab->tlsdesc_got |
6de2ae4a L |
6271 | - htab->elf.splt->output_section->vma |
6272 | - htab->elf.splt->output_offset | |
67a4f2b7 | 6273 | - htab->tlsdesc_plt |
eed180f8 RM |
6274 | - abed->plt0_got2_insn_end), |
6275 | htab->elf.splt->contents | |
6276 | + htab->tlsdesc_plt + abed->plt0_got2_offset); | |
67a4f2b7 | 6277 | } |
70256ad8 | 6278 | } |
70256ad8 AJ |
6279 | } |
6280 | ||
0ff2b86e L |
6281 | if (htab->plt_bnd != NULL) |
6282 | elf_section_data (htab->plt_bnd->output_section) | |
6283 | ->this_hdr.sh_entsize = sizeof (elf_x86_64_bnd_plt2_entry); | |
6284 | ||
6de2ae4a | 6285 | if (htab->elf.sgotplt) |
70256ad8 | 6286 | { |
56d4289c L |
6287 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
6288 | { | |
6289 | (*_bfd_error_handler) | |
6290 | (_("discarded output section: `%A'"), htab->elf.sgotplt); | |
6291 | return FALSE; | |
6292 | } | |
6293 | ||
c434dee6 | 6294 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 6295 | if (htab->elf.sgotplt->size > 0) |
c434dee6 AJ |
6296 | { |
6297 | /* Set the first entry in the global offset table to the address of | |
6298 | the dynamic section. */ | |
6299 | if (sdyn == NULL) | |
6de2ae4a | 6300 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); |
c434dee6 AJ |
6301 | else |
6302 | bfd_put_64 (output_bfd, | |
6303 | sdyn->output_section->vma + sdyn->output_offset, | |
6de2ae4a | 6304 | htab->elf.sgotplt->contents); |
c434dee6 | 6305 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
6de2ae4a L |
6306 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); |
6307 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
c434dee6 | 6308 | } |
70256ad8 | 6309 | |
6de2ae4a | 6310 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = |
c434dee6 AJ |
6311 | GOT_ENTRY_SIZE; |
6312 | } | |
70256ad8 | 6313 | |
e41b3a13 | 6314 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
6315 | if (htab->plt_eh_frame != NULL |
6316 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
6317 | { |
6318 | if (htab->elf.splt != NULL | |
6319 | && htab->elf.splt->size != 0 | |
6320 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
6321 | && htab->elf.splt->output_section != NULL | |
6322 | && htab->plt_eh_frame->output_section != NULL) | |
6323 | { | |
6324 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
6325 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
6326 | + htab->plt_eh_frame->output_offset | |
6327 | + PLT_FDE_START_OFFSET; | |
6328 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
6329 | htab->plt_eh_frame->contents | |
6330 | + PLT_FDE_START_OFFSET); | |
6331 | } | |
dbaa2011 | 6332 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
6333 | { |
6334 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
6335 | htab->plt_eh_frame, | |
6336 | htab->plt_eh_frame->contents)) | |
6337 | return FALSE; | |
6338 | } | |
6339 | } | |
6340 | ||
6de2ae4a L |
6341 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
6342 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
6343 | = GOT_ENTRY_SIZE; |
6344 | ||
aec6b87e L |
6345 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
6346 | if (bfd_link_pie (info)) | |
6347 | bfd_hash_traverse (&info->hash->table, | |
6348 | elf_x86_64_pie_finish_undefweak_symbol, | |
6349 | info); | |
6350 | ||
b34976b6 | 6351 | return TRUE; |
8d88c4ca NC |
6352 | } |
6353 | ||
233cc9c1 L |
6354 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
6355 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
6356 | It has to be done before elf_link_sort_relocs is called so that | |
6357 | dynamic relocations are properly sorted. */ | |
6358 | ||
6359 | static bfd_boolean | |
6360 | elf_x86_64_output_arch_local_syms | |
6361 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
6362 | struct bfd_link_info *info, | |
6363 | void *flaginfo ATTRIBUTE_UNUSED, | |
6364 | int (*func) (void *, const char *, | |
6365 | Elf_Internal_Sym *, | |
6366 | asection *, | |
6367 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
6368 | { | |
6369 | struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info); | |
6370 | if (htab == NULL) | |
6371 | return FALSE; | |
6372 | ||
6373 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
6374 | htab_traverse (htab->loc_hash_table, | |
6375 | elf_x86_64_finish_local_dynamic_symbol, | |
6376 | info); | |
6377 | ||
6378 | return TRUE; | |
6379 | } | |
6380 | ||
3972882e | 6381 | /* Return an array of PLT entry symbol values. */ |
4c45e5c9 | 6382 | |
3972882e L |
6383 | static bfd_vma * |
6384 | elf_x86_64_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt, | |
6385 | asection *relplt) | |
4c45e5c9 | 6386 | { |
3972882e L |
6387 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
6388 | arelent *p; | |
6389 | long count, i; | |
6390 | bfd_vma *plt_sym_val; | |
144bed8d | 6391 | bfd_vma plt_offset; |
3972882e L |
6392 | bfd_byte *plt_contents; |
6393 | const struct elf_x86_64_backend_data *bed; | |
6394 | Elf_Internal_Shdr *hdr; | |
6395 | asection *plt_bnd; | |
144bed8d | 6396 | |
3972882e L |
6397 | /* Get the .plt section contents. PLT passed down may point to the |
6398 | .plt.bnd section. Make sure that PLT always points to the .plt | |
6399 | section. */ | |
6400 | plt_bnd = bfd_get_section_by_name (abfd, ".plt.bnd"); | |
6401 | if (plt_bnd) | |
6402 | { | |
6403 | if (plt != plt_bnd) | |
6404 | abort (); | |
6405 | plt = bfd_get_section_by_name (abfd, ".plt"); | |
6406 | if (plt == NULL) | |
6407 | abort (); | |
6408 | bed = &elf_x86_64_bnd_arch_bed; | |
6409 | } | |
6410 | else | |
6411 | bed = get_elf_x86_64_backend_data (abfd); | |
cca5b8b6 | 6412 | |
3972882e L |
6413 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); |
6414 | if (plt_contents == NULL) | |
6415 | return NULL; | |
6416 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
6417 | plt_contents, 0, plt->size)) | |
144bed8d | 6418 | { |
3972882e L |
6419 | bad_return: |
6420 | free (plt_contents); | |
6421 | return NULL; | |
144bed8d L |
6422 | } |
6423 | ||
3972882e L |
6424 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
6425 | if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) | |
6426 | goto bad_return; | |
144bed8d | 6427 | |
3972882e L |
6428 | hdr = &elf_section_data (relplt)->this_hdr; |
6429 | count = relplt->size / hdr->sh_entsize; | |
144bed8d | 6430 | |
3972882e L |
6431 | plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count); |
6432 | if (plt_sym_val == NULL) | |
6433 | goto bad_return; | |
cca5b8b6 | 6434 | |
35181b3e | 6435 | for (i = 0; i < count; i++) |
3972882e | 6436 | plt_sym_val[i] = -1; |
cca5b8b6 | 6437 | |
3972882e L |
6438 | plt_offset = bed->plt_entry_size; |
6439 | p = relplt->relocation; | |
6440 | for (i = 0; i < count; i++, p++) | |
144bed8d | 6441 | { |
3972882e | 6442 | long reloc_index; |
144bed8d | 6443 | |
6f25f223 | 6444 | /* Skip unknown relocation. */ |
533d0af0 | 6445 | if (p->howto == NULL) |
6f25f223 | 6446 | continue; |
533d0af0 | 6447 | |
3972882e L |
6448 | if (p->howto->type != R_X86_64_JUMP_SLOT |
6449 | && p->howto->type != R_X86_64_IRELATIVE) | |
6450 | continue; | |
144bed8d | 6451 | |
3972882e L |
6452 | reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset |
6453 | + bed->plt_reloc_offset)); | |
ec1f73bb | 6454 | if (reloc_index < count) |
144bed8d | 6455 | { |
ec1f73bb AM |
6456 | if (plt_bnd) |
6457 | { | |
6458 | /* This is the index in .plt section. */ | |
6459 | long plt_index = plt_offset / bed->plt_entry_size; | |
6460 | /* Store VMA + the offset in .plt.bnd section. */ | |
6461 | plt_sym_val[reloc_index] = | |
6462 | (plt_bnd->vma | |
6463 | + (plt_index - 1) * sizeof (elf_x86_64_legacy_plt2_entry)); | |
6464 | } | |
6465 | else | |
6466 | plt_sym_val[reloc_index] = plt->vma + plt_offset; | |
144bed8d L |
6467 | } |
6468 | plt_offset += bed->plt_entry_size; | |
fca6ae69 L |
6469 | |
6470 | /* PR binutils/18437: Skip extra relocations in the .rela.plt | |
6471 | section. */ | |
6472 | if (plt_offset >= plt->size) | |
6473 | break; | |
144bed8d L |
6474 | } |
6475 | ||
3972882e L |
6476 | free (plt_contents); |
6477 | ||
6478 | return plt_sym_val; | |
4c45e5c9 | 6479 | } |
8df9fc9d | 6480 | |
0ff2b86e L |
6481 | /* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section |
6482 | support. */ | |
6483 | ||
6484 | static long | |
6485 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
6486 | long symcount, | |
6487 | asymbol **syms, | |
6488 | long dynsymcount, | |
6489 | asymbol **dynsyms, | |
6490 | asymbol **ret) | |
6491 | { | |
3972882e L |
6492 | /* Pass the .plt.bnd section to _bfd_elf_ifunc_get_synthetic_symtab |
6493 | as PLT if it exists. */ | |
6494 | asection *plt = bfd_get_section_by_name (abfd, ".plt.bnd"); | |
0ff2b86e | 6495 | if (plt == NULL) |
3972882e L |
6496 | plt = bfd_get_section_by_name (abfd, ".plt"); |
6497 | return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms, | |
6498 | dynsymcount, dynsyms, ret, | |
6499 | plt, | |
6500 | elf_x86_64_get_plt_sym_val); | |
0ff2b86e L |
6501 | } |
6502 | ||
d2b2c203 DJ |
6503 | /* Handle an x86-64 specific section when reading an object file. This |
6504 | is called when elfcode.h finds a section with an unknown type. */ | |
6505 | ||
6506 | static bfd_boolean | |
0c723101 L |
6507 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
6508 | const char *name, int shindex) | |
d2b2c203 DJ |
6509 | { |
6510 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
6511 | return FALSE; | |
6512 | ||
6dc132d9 | 6513 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
6514 | return FALSE; |
6515 | ||
6516 | return TRUE; | |
6517 | } | |
6518 | ||
3b22753a L |
6519 | /* Hook called by the linker routine which adds symbols from an object |
6520 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
6521 | of .bss. */ | |
6522 | ||
6523 | static bfd_boolean | |
351f65ca | 6524 | elf_x86_64_add_symbol_hook (bfd *abfd, |
a43942db | 6525 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
351f65ca L |
6526 | Elf_Internal_Sym *sym, |
6527 | const char **namep ATTRIBUTE_UNUSED, | |
6528 | flagword *flagsp ATTRIBUTE_UNUSED, | |
6529 | asection **secp, | |
6530 | bfd_vma *valp) | |
3b22753a L |
6531 | { |
6532 | asection *lcomm; | |
6533 | ||
6534 | switch (sym->st_shndx) | |
6535 | { | |
6536 | case SHN_X86_64_LCOMMON: | |
6537 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
6538 | if (lcomm == NULL) | |
6539 | { | |
6540 | lcomm = bfd_make_section_with_flags (abfd, | |
6541 | "LARGE_COMMON", | |
6542 | (SEC_ALLOC | |
6543 | | SEC_IS_COMMON | |
6544 | | SEC_LINKER_CREATED)); | |
6545 | if (lcomm == NULL) | |
6546 | return FALSE; | |
6547 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
6548 | } | |
6549 | *secp = lcomm; | |
6550 | *valp = sym->st_size; | |
c35bdf6e | 6551 | return TRUE; |
3b22753a | 6552 | } |
d8045f23 | 6553 | |
3b22753a L |
6554 | return TRUE; |
6555 | } | |
6556 | ||
6557 | ||
6558 | /* Given a BFD section, try to locate the corresponding ELF section | |
6559 | index. */ | |
6560 | ||
6561 | static bfd_boolean | |
351f65ca L |
6562 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
6563 | asection *sec, int *index_return) | |
3b22753a L |
6564 | { |
6565 | if (sec == &_bfd_elf_large_com_section) | |
6566 | { | |
91d6fa6a | 6567 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
6568 | return TRUE; |
6569 | } | |
6570 | return FALSE; | |
6571 | } | |
6572 | ||
6573 | /* Process a symbol. */ | |
6574 | ||
6575 | static void | |
351f65ca L |
6576 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
6577 | asymbol *asym) | |
3b22753a L |
6578 | { |
6579 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
6580 | ||
6581 | switch (elfsym->internal_elf_sym.st_shndx) | |
6582 | { | |
6583 | case SHN_X86_64_LCOMMON: | |
6584 | asym->section = &_bfd_elf_large_com_section; | |
6585 | asym->value = elfsym->internal_elf_sym.st_size; | |
6586 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
6587 | asym->flags &= ~BSF_GLOBAL; | |
6588 | break; | |
6589 | } | |
6590 | } | |
6591 | ||
6592 | static bfd_boolean | |
351f65ca | 6593 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
6594 | { |
6595 | return (sym->st_shndx == SHN_COMMON | |
6596 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
6597 | } | |
6598 | ||
6599 | static unsigned int | |
351f65ca | 6600 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
6601 | { |
6602 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
6603 | return SHN_COMMON; | |
6604 | else | |
6605 | return SHN_X86_64_LCOMMON; | |
6606 | } | |
6607 | ||
6608 | static asection * | |
351f65ca | 6609 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
6610 | { |
6611 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
6612 | return bfd_com_section_ptr; | |
6613 | else | |
6614 | return &_bfd_elf_large_com_section; | |
6615 | } | |
6616 | ||
6617 | static bfd_boolean | |
5d13b3b3 AM |
6618 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
6619 | const Elf_Internal_Sym *sym, | |
351f65ca | 6620 | asection **psec, |
5d13b3b3 AM |
6621 | bfd_boolean newdef, |
6622 | bfd_boolean olddef, | |
351f65ca | 6623 | bfd *oldbfd, |
5d13b3b3 | 6624 | const asection *oldsec) |
3b22753a L |
6625 | { |
6626 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
6627 | normal common symbol. We turn the large common symbol into a |
6628 | normal one. */ | |
5d13b3b3 | 6629 | if (!olddef |
3b22753a | 6630 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
6631 | && !newdef |
6632 | && bfd_is_com_section (*psec) | |
6633 | && oldsec != *psec) | |
3b22753a | 6634 | { |
00492999 | 6635 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 6636 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
6637 | { |
6638 | h->root.u.c.p->section | |
6639 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
6640 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
6641 | } | |
6642 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
6643 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
6644 | *psec = bfd_com_section_ptr; | |
3b22753a L |
6645 | } |
6646 | ||
6647 | return TRUE; | |
6648 | } | |
6649 | ||
6650 | static int | |
351f65ca L |
6651 | elf_x86_64_additional_program_headers (bfd *abfd, |
6652 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
6653 | { |
6654 | asection *s; | |
9a2e389a | 6655 | int count = 0; |
3b22753a L |
6656 | |
6657 | /* Check to see if we need a large readonly segment. */ | |
6658 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
6659 | if (s && (s->flags & SEC_LOAD)) | |
6660 | count++; | |
6661 | ||
6662 | /* Check to see if we need a large data segment. Since .lbss sections | |
6663 | is placed right after the .bss section, there should be no need for | |
6664 | a large data segment just because of .lbss. */ | |
6665 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
6666 | if (s && (s->flags & SEC_LOAD)) | |
6667 | count++; | |
6668 | ||
6669 | return count; | |
6670 | } | |
6671 | ||
fdc90cb4 JJ |
6672 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
6673 | ||
6674 | static bfd_boolean | |
351f65ca | 6675 | elf_x86_64_hash_symbol (struct elf_link_hash_entry *h) |
fdc90cb4 JJ |
6676 | { |
6677 | if (h->plt.offset != (bfd_vma) -1 | |
6678 | && !h->def_regular | |
6679 | && !h->pointer_equality_needed) | |
6680 | return FALSE; | |
6681 | ||
6682 | return _bfd_elf_hash_symbol (h); | |
6683 | } | |
6684 | ||
c543bf9a L |
6685 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
6686 | ||
6687 | static bfd_boolean | |
6688 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
6689 | const bfd_target *output) | |
6690 | { | |
6691 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
6692 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
6693 | && _bfd_elf_relocs_compatible (input, output)); | |
6694 | } | |
6695 | ||
9a2e389a | 6696 | static const struct bfd_elf_special_section |
351f65ca | 6697 | elf_x86_64_special_sections[]= |
3b22753a | 6698 | { |
0112cd26 NC |
6699 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
6700 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
6701 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
6702 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
6703 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
6704 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
6705 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
6706 | }; |
6707 | ||
6d00b590 | 6708 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
6709 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
6710 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 6711 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 6712 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 6713 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 6714 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 6715 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
6716 | |
6717 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 6718 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
6719 | #define elf_backend_want_got_plt 1 |
6720 | #define elf_backend_plt_readonly 1 | |
6721 | #define elf_backend_want_plt_sym 0 | |
6722 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 6723 | #define elf_backend_rela_normal 1 |
e41b3a13 | 6724 | #define elf_backend_plt_alignment 4 |
f7483970 | 6725 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 6726 | #define elf_backend_caches_rawsize 1 |
70256ad8 | 6727 | |
351f65ca | 6728 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 6729 | |
70256ad8 | 6730 | #define bfd_elf64_bfd_link_hash_table_create \ |
351f65ca | 6731 | elf_x86_64_link_hash_table_create |
351f65ca | 6732 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 6733 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 6734 | elf_x86_64_reloc_name_lookup |
70256ad8 | 6735 | |
351f65ca | 6736 | #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol |
c543bf9a | 6737 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca L |
6738 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
6739 | #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol | |
6740 | #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections | |
6741 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections | |
6742 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
233cc9c1 | 6743 | #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms |
351f65ca | 6744 | #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook |
351f65ca L |
6745 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus |
6746 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
6747 | #ifdef CORE_HEADER |
6748 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
6749 | #endif | |
351f65ca L |
6750 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
6751 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
6752 | #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections | |
6753 | #define elf_backend_always_size_sections elf_x86_64_always_size_sections | |
74541ad4 | 6754 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 6755 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
351f65ca | 6756 | #define bfd_elf64_mkobject elf_x86_64_mkobject |
0ff2b86e | 6757 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 6758 | |
d2b2c203 | 6759 | #define elf_backend_section_from_shdr \ |
351f65ca | 6760 | elf_x86_64_section_from_shdr |
d2b2c203 | 6761 | |
3b22753a | 6762 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 6763 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 6764 | #define elf_backend_add_symbol_hook \ |
351f65ca | 6765 | elf_x86_64_add_symbol_hook |
3b22753a | 6766 | #define elf_backend_symbol_processing \ |
351f65ca | 6767 | elf_x86_64_symbol_processing |
3b22753a | 6768 | #define elf_backend_common_section_index \ |
351f65ca | 6769 | elf_x86_64_common_section_index |
3b22753a | 6770 | #define elf_backend_common_section \ |
351f65ca | 6771 | elf_x86_64_common_section |
3b22753a | 6772 | #define elf_backend_common_definition \ |
351f65ca | 6773 | elf_x86_64_common_definition |
3b22753a | 6774 | #define elf_backend_merge_symbol \ |
351f65ca | 6775 | elf_x86_64_merge_symbol |
3b22753a | 6776 | #define elf_backend_special_sections \ |
351f65ca | 6777 | elf_x86_64_special_sections |
3b22753a | 6778 | #define elf_backend_additional_program_headers \ |
351f65ca | 6779 | elf_x86_64_additional_program_headers |
fdc90cb4 | 6780 | #define elf_backend_hash_symbol \ |
351f65ca | 6781 | elf_x86_64_hash_symbol |
8f79b794 L |
6782 | #define elf_backend_omit_section_dynsym \ |
6783 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
aec6b87e L |
6784 | #define elf_backend_fixup_symbol \ |
6785 | elf_x86_64_fixup_symbol | |
3b22753a | 6786 | |
8d88c4ca | 6787 | #include "elf64-target.h" |
9d7cbccd | 6788 | |
6036f486 ES |
6789 | /* CloudABI support. */ |
6790 | ||
6791 | #undef TARGET_LITTLE_SYM | |
6792 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec | |
6793 | #undef TARGET_LITTLE_NAME | |
6794 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" | |
6795 | ||
6796 | #undef ELF_OSABI | |
6797 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
6798 | ||
6799 | #undef elf64_bed | |
6800 | #define elf64_bed elf64_x86_64_cloudabi_bed | |
6801 | ||
6802 | #include "elf64-target.h" | |
6803 | ||
9d7cbccd NC |
6804 | /* FreeBSD support. */ |
6805 | ||
6806 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6807 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
9d7cbccd NC |
6808 | #undef TARGET_LITTLE_NAME |
6809 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
6810 | ||
d1036acb L |
6811 | #undef ELF_OSABI |
6812 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 6813 | |
9d7cbccd NC |
6814 | #undef elf64_bed |
6815 | #define elf64_bed elf64_x86_64_fbsd_bed | |
6816 | ||
6817 | #include "elf64-target.h" | |
8a9036a4 | 6818 | |
a6cc6b3b RO |
6819 | /* Solaris 2 support. */ |
6820 | ||
6821 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6822 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
6823 | #undef TARGET_LITTLE_NAME |
6824 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
6825 | ||
6826 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
6827 | objects won't be recognized. */ | |
6828 | #undef ELF_OSABI | |
6829 | ||
6830 | #undef elf64_bed | |
6831 | #define elf64_bed elf64_x86_64_sol2_bed | |
6832 | ||
7dc98aea RO |
6833 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
6834 | boundary. */ | |
84865015 | 6835 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
6836 | #define elf_backend_static_tls_alignment 16 |
6837 | ||
a6cc6b3b RO |
6838 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
6839 | ||
6840 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
6841 | File, p.63. */ | |
84865015 | 6842 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
6843 | #define elf_backend_want_plt_sym 1 |
6844 | ||
84865015 NC |
6845 | #undef elf_backend_strtab_flags |
6846 | #define elf_backend_strtab_flags SHF_STRINGS | |
6847 | ||
6848 | static bfd_boolean | |
5522f910 NC |
6849 | elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
6850 | bfd *obfd ATTRIBUTE_UNUSED, | |
6851 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
6852 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
6853 | { |
6854 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
6855 | and sh_link fields of Solaris specific section types. */ | |
6856 | return FALSE; | |
6857 | } | |
6858 | ||
5522f910 NC |
6859 | #undef elf_backend_copy_special_section_fields |
6860 | #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields | |
84865015 | 6861 | |
a6cc6b3b RO |
6862 | #include "elf64-target.h" |
6863 | ||
8059fb19 RM |
6864 | /* Native Client support. */ |
6865 | ||
64b384e1 RM |
6866 | static bfd_boolean |
6867 | elf64_x86_64_nacl_elf_object_p (bfd *abfd) | |
6868 | { | |
6869 | /* Set the right machine number for a NaCl x86-64 ELF64 file. */ | |
6870 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl); | |
6871 | return TRUE; | |
6872 | } | |
6873 | ||
8059fb19 | 6874 | #undef TARGET_LITTLE_SYM |
6d00b590 | 6875 | #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec |
8059fb19 RM |
6876 | #undef TARGET_LITTLE_NAME |
6877 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
6878 | #undef elf64_bed | |
6879 | #define elf64_bed elf64_x86_64_nacl_bed | |
6880 | ||
6881 | #undef ELF_MAXPAGESIZE | |
6882 | #undef ELF_MINPAGESIZE | |
6883 | #undef ELF_COMMONPAGESIZE | |
6884 | #define ELF_MAXPAGESIZE 0x10000 | |
6885 | #define ELF_MINPAGESIZE 0x10000 | |
6886 | #define ELF_COMMONPAGESIZE 0x10000 | |
6887 | ||
6888 | /* Restore defaults. */ | |
6889 | #undef ELF_OSABI | |
6890 | #undef elf_backend_static_tls_alignment | |
6891 | #undef elf_backend_want_plt_sym | |
6892 | #define elf_backend_want_plt_sym 0 | |
84865015 | 6893 | #undef elf_backend_strtab_flags |
5522f910 | 6894 | #undef elf_backend_copy_special_section_fields |
8059fb19 RM |
6895 | |
6896 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
6897 | ||
6898 | #undef elf_backend_plt_alignment | |
6899 | #define elf_backend_plt_alignment 5 | |
6900 | #define NACL_PLT_ENTRY_SIZE 64 | |
6901 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
6902 | ||
6903 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
6904 | { | |
6905 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
6906 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ | |
6907 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
6908 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
6909 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
6910 | ||
ea2d813e | 6911 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
70cc877f | 6912 | 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */ |
ea2d813e RM |
6913 | |
6914 | /* 32 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 6915 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 6916 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 6917 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 6918 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 6919 | 0x66, /* excess data16 prefix */ |
ea2d813e | 6920 | 0x90 /* nop */ |
8059fb19 RM |
6921 | }; |
6922 | ||
6923 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6924 | { | |
6925 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
6926 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
6927 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
6928 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
6929 | ||
6930 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
3ddf1bdd | 6931 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
6932 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
6933 | ||
6934 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6935 | 0x68, /* pushq immediate */ | |
6936 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
6937 | 0xe9, /* jmp relative */ | |
6938 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
6939 | ||
6940 | /* 22 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 6941 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
6942 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
6943 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ | |
6944 | }; | |
6945 | ||
6946 | /* .eh_frame covering the .plt section. */ | |
6947 | ||
6948 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
6949 | { | |
6950 | #if (PLT_CIE_LENGTH != 20 \ | |
6951 | || PLT_FDE_LENGTH != 36 \ | |
6952 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
6953 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
6954 | # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!" | |
6955 | #endif | |
6956 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
6957 | 0, 0, 0, 0, /* CIE ID */ | |
6958 | 1, /* CIE version */ | |
6959 | 'z', 'R', 0, /* Augmentation string */ | |
6960 | 1, /* Code alignment factor */ | |
6961 | 0x78, /* Data alignment factor */ | |
6962 | 16, /* Return address column */ | |
6963 | 1, /* Augmentation size */ | |
6964 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
6965 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
6966 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
6967 | DW_CFA_nop, DW_CFA_nop, | |
6968 | ||
6969 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
6970 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
6971 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
6972 | 0, 0, 0, 0, /* .plt size goes here */ | |
6973 | 0, /* Augmentation size */ | |
6974 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
6975 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
6976 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
6977 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
6978 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
6979 | 13, /* Block length */ | |
6980 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
6981 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
6982 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
6983 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
6984 | DW_CFA_nop, DW_CFA_nop | |
6985 | }; | |
6986 | ||
6987 | static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed = | |
6988 | { | |
6989 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ | |
6990 | elf_x86_64_nacl_plt_entry, /* plt_entry */ | |
6991 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
6992 | 2, /* plt0_got1_offset */ | |
6993 | 9, /* plt0_got2_offset */ | |
6994 | 13, /* plt0_got2_insn_end */ | |
6995 | 3, /* plt_got_offset */ | |
6996 | 33, /* plt_reloc_offset */ | |
6997 | 38, /* plt_plt_offset */ | |
6998 | 7, /* plt_got_insn_size */ | |
6999 | 42, /* plt_plt_insn_end */ | |
7000 | 32, /* plt_lazy_offset */ | |
7001 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ | |
7002 | sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */ | |
7003 | }; | |
7004 | ||
7005 | #undef elf_backend_arch_data | |
7006 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
7007 | ||
64b384e1 RM |
7008 | #undef elf_backend_object_p |
7009 | #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p | |
5a68afcf RM |
7010 | #undef elf_backend_modify_segment_map |
7011 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
7012 | #undef elf_backend_modify_program_headers | |
7013 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
7014 | #undef elf_backend_final_write_processing |
7015 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 7016 | |
8059fb19 RM |
7017 | #include "elf64-target.h" |
7018 | ||
7019 | /* Native Client x32 support. */ | |
7020 | ||
64b384e1 RM |
7021 | static bfd_boolean |
7022 | elf32_x86_64_nacl_elf_object_p (bfd *abfd) | |
7023 | { | |
7024 | /* Set the right machine number for a NaCl x86-64 ELF32 file. */ | |
7025 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl); | |
7026 | return TRUE; | |
7027 | } | |
7028 | ||
8059fb19 | 7029 | #undef TARGET_LITTLE_SYM |
6d00b590 | 7030 | #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec |
8059fb19 RM |
7031 | #undef TARGET_LITTLE_NAME |
7032 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" | |
7033 | #undef elf32_bed | |
7034 | #define elf32_bed elf32_x86_64_nacl_bed | |
7035 | ||
7036 | #define bfd_elf32_bfd_link_hash_table_create \ | |
7037 | elf_x86_64_link_hash_table_create | |
8059fb19 RM |
7038 | #define bfd_elf32_bfd_reloc_type_lookup \ |
7039 | elf_x86_64_reloc_type_lookup | |
7040 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
7041 | elf_x86_64_reloc_name_lookup | |
7042 | #define bfd_elf32_mkobject \ | |
7043 | elf_x86_64_mkobject | |
b7365e5d L |
7044 | #define bfd_elf32_get_synthetic_symtab \ |
7045 | elf_x86_64_get_synthetic_symtab | |
8059fb19 RM |
7046 | |
7047 | #undef elf_backend_object_p | |
7048 | #define elf_backend_object_p \ | |
64b384e1 | 7049 | elf32_x86_64_nacl_elf_object_p |
8059fb19 RM |
7050 | |
7051 | #undef elf_backend_bfd_from_remote_memory | |
7052 | #define elf_backend_bfd_from_remote_memory \ | |
7053 | _bfd_elf32_bfd_from_remote_memory | |
7054 | ||
7055 | #undef elf_backend_size_info | |
7056 | #define elf_backend_size_info \ | |
7057 | _bfd_elf32_size_info | |
7058 | ||
7059 | #include "elf32-target.h" | |
7060 | ||
7061 | /* Restore defaults. */ | |
5a68afcf | 7062 | #undef elf_backend_object_p |
8059fb19 | 7063 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
7064 | #undef elf_backend_bfd_from_remote_memory |
7065 | #undef elf_backend_size_info | |
7066 | #undef elf_backend_modify_segment_map | |
7067 | #undef elf_backend_modify_program_headers | |
887badb3 | 7068 | #undef elf_backend_final_write_processing |
8059fb19 | 7069 | |
8a9036a4 L |
7070 | /* Intel L1OM support. */ |
7071 | ||
7072 | static bfd_boolean | |
7073 | elf64_l1om_elf_object_p (bfd *abfd) | |
7074 | { | |
7075 | /* Set the right machine number for an L1OM elf64 file. */ | |
7076 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
7077 | return TRUE; | |
7078 | } | |
7079 | ||
7080 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7081 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
7082 | #undef TARGET_LITTLE_NAME |
7083 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
7084 | #undef ELF_ARCH | |
7085 | #define ELF_ARCH bfd_arch_l1om | |
7086 | ||
7087 | #undef ELF_MACHINE_CODE | |
7088 | #define ELF_MACHINE_CODE EM_L1OM | |
7089 | ||
7090 | #undef ELF_OSABI | |
7091 | ||
7092 | #undef elf64_bed | |
7093 | #define elf64_bed elf64_l1om_bed | |
7094 | ||
7095 | #undef elf_backend_object_p | |
7096 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
7097 | ||
8059fb19 RM |
7098 | /* Restore defaults. */ |
7099 | #undef ELF_MAXPAGESIZE | |
7100 | #undef ELF_MINPAGESIZE | |
7101 | #undef ELF_COMMONPAGESIZE | |
7102 | #define ELF_MAXPAGESIZE 0x200000 | |
7103 | #define ELF_MINPAGESIZE 0x1000 | |
7104 | #define ELF_COMMONPAGESIZE 0x1000 | |
7105 | #undef elf_backend_plt_alignment | |
7106 | #define elf_backend_plt_alignment 4 | |
7107 | #undef elf_backend_arch_data | |
7108 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 7109 | |
8a9036a4 L |
7110 | #include "elf64-target.h" |
7111 | ||
7112 | /* FreeBSD L1OM support. */ | |
7113 | ||
7114 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7115 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
7116 | #undef TARGET_LITTLE_NAME |
7117 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
7118 | ||
7119 | #undef ELF_OSABI | |
7120 | #define ELF_OSABI ELFOSABI_FREEBSD | |
7121 | ||
7122 | #undef elf64_bed | |
7123 | #define elf64_bed elf64_l1om_fbsd_bed | |
7124 | ||
8a9036a4 | 7125 | #include "elf64-target.h" |
351f65ca | 7126 | |
7a9068fe L |
7127 | /* Intel K1OM support. */ |
7128 | ||
7129 | static bfd_boolean | |
7130 | elf64_k1om_elf_object_p (bfd *abfd) | |
7131 | { | |
7132 | /* Set the right machine number for an K1OM elf64 file. */ | |
7133 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
7134 | return TRUE; | |
7135 | } | |
7136 | ||
7137 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7138 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
7139 | #undef TARGET_LITTLE_NAME |
7140 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
7141 | #undef ELF_ARCH | |
7142 | #define ELF_ARCH bfd_arch_k1om | |
7143 | ||
7144 | #undef ELF_MACHINE_CODE | |
7145 | #define ELF_MACHINE_CODE EM_K1OM | |
7146 | ||
7147 | #undef ELF_OSABI | |
7148 | ||
7149 | #undef elf64_bed | |
7150 | #define elf64_bed elf64_k1om_bed | |
7151 | ||
7152 | #undef elf_backend_object_p | |
7153 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
7154 | ||
7155 | #undef elf_backend_static_tls_alignment | |
7156 | ||
7157 | #undef elf_backend_want_plt_sym | |
7158 | #define elf_backend_want_plt_sym 0 | |
7159 | ||
7160 | #include "elf64-target.h" | |
7161 | ||
7162 | /* FreeBSD K1OM support. */ | |
7163 | ||
7164 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7165 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
7166 | #undef TARGET_LITTLE_NAME |
7167 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
7168 | ||
7169 | #undef ELF_OSABI | |
7170 | #define ELF_OSABI ELFOSABI_FREEBSD | |
7171 | ||
7172 | #undef elf64_bed | |
7173 | #define elf64_bed elf64_k1om_fbsd_bed | |
7174 | ||
7175 | #include "elf64-target.h" | |
7176 | ||
351f65ca L |
7177 | /* 32bit x86-64 support. */ |
7178 | ||
351f65ca | 7179 | #undef TARGET_LITTLE_SYM |
6d00b590 | 7180 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
7181 | #undef TARGET_LITTLE_NAME |
7182 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 7183 | #undef elf32_bed |
351f65ca L |
7184 | |
7185 | #undef ELF_ARCH | |
7186 | #define ELF_ARCH bfd_arch_i386 | |
7187 | ||
7188 | #undef ELF_MACHINE_CODE | |
7189 | #define ELF_MACHINE_CODE EM_X86_64 | |
7190 | ||
351f65ca L |
7191 | #undef ELF_OSABI |
7192 | ||
351f65ca L |
7193 | #undef elf_backend_object_p |
7194 | #define elf_backend_object_p \ | |
7195 | elf32_x86_64_elf_object_p | |
7196 | ||
7197 | #undef elf_backend_bfd_from_remote_memory | |
7198 | #define elf_backend_bfd_from_remote_memory \ | |
7199 | _bfd_elf32_bfd_from_remote_memory | |
7200 | ||
7201 | #undef elf_backend_size_info | |
7202 | #define elf_backend_size_info \ | |
7203 | _bfd_elf32_size_info | |
7204 | ||
7205 | #include "elf32-target.h" |