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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 | ||
70256ad8 AJ |
745 | /* x86-64 ELF linker hash entry. */ |
746 | ||
351f65ca | 747 | struct elf_x86_64_link_hash_entry |
70256ad8 | 748 | { |
c434dee6 | 749 | struct elf_link_hash_entry elf; |
70256ad8 | 750 | |
c434dee6 | 751 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 752 | struct elf_dyn_relocs *dyn_relocs; |
bffbf940 JJ |
753 | |
754 | #define GOT_UNKNOWN 0 | |
755 | #define GOT_NORMAL 1 | |
756 | #define GOT_TLS_GD 2 | |
757 | #define GOT_TLS_IE 3 | |
67a4f2b7 AO |
758 | #define GOT_TLS_GDESC 4 |
759 | #define GOT_TLS_GD_BOTH_P(type) \ | |
760 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
761 | #define GOT_TLS_GD_P(type) \ | |
762 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
763 | #define GOT_TLS_GDESC_P(type) \ | |
764 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
765 | #define GOT_TLS_GD_ANY_P(type) \ | |
766 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
bffbf940 | 767 | unsigned char tls_type; |
67a4f2b7 | 768 | |
bc696fd5 L |
769 | /* TRUE if a weak symbol with a real definition needs a copy reloc. |
770 | When there is a weak symbol with a real definition, the processor | |
771 | independent code will have arranged for us to see the real | |
772 | definition first. We need to copy the needs_copy bit from the | |
773 | real definition and check it when allowing copy reloc in PIE. */ | |
774 | unsigned int needs_copy : 1; | |
775 | ||
0ff2b86e | 776 | /* TRUE if symbol has at least one BND relocation. */ |
bc696fd5 | 777 | unsigned int has_bnd_reloc : 1; |
0ff2b86e | 778 | |
04ebc307 L |
779 | /* Reference count of C/C++ function pointer relocations in read-write |
780 | section which can be resolved at run-time. */ | |
781 | bfd_signed_vma func_pointer_refcount; | |
782 | ||
dd7e64d4 L |
783 | /* Information about the GOT PLT entry. Filled when there are both |
784 | GOT and PLT relocations against the same function. */ | |
785 | union gotplt_union plt_got; | |
786 | ||
0ff2b86e L |
787 | /* Information about the second PLT entry. Filled when has_bnd_reloc is |
788 | set. */ | |
789 | union gotplt_union plt_bnd; | |
790 | ||
67a4f2b7 AO |
791 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, |
792 | starting at the end of the jump table. */ | |
793 | bfd_vma tlsdesc_got; | |
bffbf940 JJ |
794 | }; |
795 | ||
351f65ca L |
796 | #define elf_x86_64_hash_entry(ent) \ |
797 | ((struct elf_x86_64_link_hash_entry *)(ent)) | |
bffbf940 | 798 | |
351f65ca | 799 | struct elf_x86_64_obj_tdata |
bffbf940 JJ |
800 | { |
801 | struct elf_obj_tdata root; | |
802 | ||
803 | /* tls_type for each local got entry. */ | |
804 | char *local_got_tls_type; | |
67a4f2b7 AO |
805 | |
806 | /* GOTPLT entries for TLS descriptors. */ | |
807 | bfd_vma *local_tlsdesc_gotent; | |
70256ad8 AJ |
808 | }; |
809 | ||
351f65ca L |
810 | #define elf_x86_64_tdata(abfd) \ |
811 | ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any) | |
bffbf940 | 812 | |
351f65ca L |
813 | #define elf_x86_64_local_got_tls_type(abfd) \ |
814 | (elf_x86_64_tdata (abfd)->local_got_tls_type) | |
bffbf940 | 815 | |
351f65ca L |
816 | #define elf_x86_64_local_tlsdesc_gotent(abfd) \ |
817 | (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent) | |
bffbf940 | 818 | |
0ffa91dd NC |
819 | #define is_x86_64_elf(bfd) \ |
820 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
821 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 822 | && elf_object_id (bfd) == X86_64_ELF_DATA) |
0ffa91dd NC |
823 | |
824 | static bfd_boolean | |
351f65ca | 825 | elf_x86_64_mkobject (bfd *abfd) |
0ffa91dd | 826 | { |
351f65ca | 827 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata), |
4dfe6ac6 | 828 | X86_64_ELF_DATA); |
0ffa91dd NC |
829 | } |
830 | ||
c434dee6 | 831 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 832 | |
351f65ca | 833 | struct elf_x86_64_link_hash_table |
407443a3 | 834 | { |
c434dee6 | 835 | struct elf_link_hash_table elf; |
70256ad8 | 836 | |
c434dee6 | 837 | /* Short-cuts to get to dynamic linker sections. */ |
c434dee6 AJ |
838 | asection *sdynbss; |
839 | asection *srelbss; | |
e41b3a13 | 840 | asection *plt_eh_frame; |
0ff2b86e | 841 | asection *plt_bnd; |
dd7e64d4 | 842 | asection *plt_got; |
70256ad8 | 843 | |
4dfe6ac6 NC |
844 | union |
845 | { | |
bffbf940 JJ |
846 | bfd_signed_vma refcount; |
847 | bfd_vma offset; | |
848 | } tls_ld_got; | |
849 | ||
67a4f2b7 AO |
850 | /* The amount of space used by the jump slots in the GOT. */ |
851 | bfd_vma sgotplt_jump_table_size; | |
852 | ||
87d72d41 AM |
853 | /* Small local sym cache. */ |
854 | struct sym_cache sym_cache; | |
9f03412a | 855 | |
351f65ca L |
856 | bfd_vma (*r_info) (bfd_vma, bfd_vma); |
857 | bfd_vma (*r_sym) (bfd_vma); | |
248775ba | 858 | unsigned int pointer_r_type; |
351f65ca L |
859 | const char *dynamic_interpreter; |
860 | int dynamic_interpreter_size; | |
861 | ||
9f03412a AO |
862 | /* _TLS_MODULE_BASE_ symbol. */ |
863 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
864 | |
865 | /* Used by local STT_GNU_IFUNC symbols. */ | |
866 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
867 | void * loc_hash_memory; |
868 | ||
869 | /* The offset into splt of the PLT entry for the TLS descriptor | |
870 | resolver. Special values are 0, if not necessary (or not found | |
871 | to be necessary yet), and -1 if needed but not determined | |
872 | yet. */ | |
873 | bfd_vma tlsdesc_plt; | |
874 | /* The offset into sgot of the GOT entry used by the PLT entry | |
875 | above. */ | |
876 | bfd_vma tlsdesc_got; | |
e1f98742 L |
877 | |
878 | /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */ | |
879 | bfd_vma next_jump_slot_index; | |
880 | /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */ | |
881 | bfd_vma next_irelative_index; | |
c434dee6 | 882 | }; |
70256ad8 AJ |
883 | |
884 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca | 885 | |
351f65ca | 886 | #define elf_x86_64_hash_table(p) \ |
4dfe6ac6 | 887 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
351f65ca | 888 | == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL) |
8d88c4ca | 889 | |
351f65ca | 890 | #define elf_x86_64_compute_jump_table_size(htab) \ |
6de2ae4a | 891 | ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE) |
67a4f2b7 | 892 | |
407443a3 | 893 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
894 | |
895 | static struct bfd_hash_entry * | |
351f65ca L |
896 | elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry, |
897 | struct bfd_hash_table *table, | |
898 | const char *string) | |
70256ad8 | 899 | { |
70256ad8 | 900 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
901 | subclass. */ |
902 | if (entry == NULL) | |
903 | { | |
a50b1753 | 904 | entry = (struct bfd_hash_entry *) |
eed180f8 RM |
905 | bfd_hash_allocate (table, |
906 | sizeof (struct elf_x86_64_link_hash_entry)); | |
c434dee6 AJ |
907 | if (entry == NULL) |
908 | return entry; | |
909 | } | |
70256ad8 AJ |
910 | |
911 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
912 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
913 | if (entry != NULL) | |
70256ad8 | 914 | { |
351f65ca | 915 | struct elf_x86_64_link_hash_entry *eh; |
c434dee6 | 916 | |
351f65ca | 917 | eh = (struct elf_x86_64_link_hash_entry *) entry; |
c434dee6 | 918 | eh->dyn_relocs = NULL; |
bffbf940 | 919 | eh->tls_type = GOT_UNKNOWN; |
bc696fd5 L |
920 | eh->needs_copy = 0; |
921 | eh->has_bnd_reloc = 0; | |
04ebc307 | 922 | eh->func_pointer_refcount = 0; |
0ff2b86e | 923 | eh->plt_bnd.offset = (bfd_vma) -1; |
dd7e64d4 | 924 | eh->plt_got.offset = (bfd_vma) -1; |
67a4f2b7 | 925 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
926 | } |
927 | ||
c434dee6 | 928 | return entry; |
70256ad8 AJ |
929 | } |
930 | ||
c25bc9fc L |
931 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
932 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
933 | as global symbol. We reuse indx and dynstr_index for local symbol | |
934 | hash since they aren't used by global symbols in this backend. */ | |
935 | ||
936 | static hashval_t | |
351f65ca | 937 | elf_x86_64_local_htab_hash (const void *ptr) |
c25bc9fc L |
938 | { |
939 | struct elf_link_hash_entry *h | |
940 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 941 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
942 | } |
943 | ||
944 | /* Compare local hash entries. */ | |
945 | ||
946 | static int | |
351f65ca | 947 | elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2) |
c25bc9fc L |
948 | { |
949 | struct elf_link_hash_entry *h1 | |
950 | = (struct elf_link_hash_entry *) ptr1; | |
951 | struct elf_link_hash_entry *h2 | |
952 | = (struct elf_link_hash_entry *) ptr2; | |
953 | ||
954 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
955 | } | |
956 | ||
957 | /* Find and/or create a hash entry for local symbol. */ | |
958 | ||
959 | static struct elf_link_hash_entry * | |
351f65ca L |
960 | elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab, |
961 | bfd *abfd, const Elf_Internal_Rela *rel, | |
962 | bfd_boolean create) | |
c25bc9fc | 963 | { |
351f65ca | 964 | struct elf_x86_64_link_hash_entry e, *ret; |
c25bc9fc | 965 | asection *sec = abfd->sections; |
d2149d72 | 966 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
351f65ca | 967 | htab->r_sym (rel->r_info)); |
c25bc9fc L |
968 | void **slot; |
969 | ||
970 | e.elf.indx = sec->id; | |
351f65ca | 971 | e.elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc L |
972 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, |
973 | create ? INSERT : NO_INSERT); | |
974 | ||
975 | if (!slot) | |
976 | return NULL; | |
977 | ||
978 | if (*slot) | |
979 | { | |
351f65ca | 980 | ret = (struct elf_x86_64_link_hash_entry *) *slot; |
c25bc9fc L |
981 | return &ret->elf; |
982 | } | |
983 | ||
351f65ca | 984 | ret = (struct elf_x86_64_link_hash_entry *) |
c25bc9fc | 985 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, |
351f65ca | 986 | sizeof (struct elf_x86_64_link_hash_entry)); |
c25bc9fc L |
987 | if (ret) |
988 | { | |
989 | memset (ret, 0, sizeof (*ret)); | |
990 | ret->elf.indx = sec->id; | |
351f65ca | 991 | ret->elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc | 992 | ret->elf.dynindx = -1; |
04ebc307 | 993 | ret->func_pointer_refcount = 0; |
dd7e64d4 | 994 | ret->plt_got.offset = (bfd_vma) -1; |
c25bc9fc L |
995 | *slot = ret; |
996 | } | |
997 | return &ret->elf; | |
998 | } | |
999 | ||
68faa637 AM |
1000 | /* Destroy an X86-64 ELF linker hash table. */ |
1001 | ||
1002 | static void | |
d495ab0d | 1003 | elf_x86_64_link_hash_table_free (bfd *obfd) |
68faa637 AM |
1004 | { |
1005 | struct elf_x86_64_link_hash_table *htab | |
d495ab0d | 1006 | = (struct elf_x86_64_link_hash_table *) obfd->link.hash; |
68faa637 AM |
1007 | |
1008 | if (htab->loc_hash_table) | |
1009 | htab_delete (htab->loc_hash_table); | |
1010 | if (htab->loc_hash_memory) | |
1011 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
d495ab0d | 1012 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
1013 | } |
1014 | ||
8d88c4ca NC |
1015 | /* Create an X86-64 ELF linker hash table. */ |
1016 | ||
1017 | static struct bfd_link_hash_table * | |
351f65ca | 1018 | elf_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca | 1019 | { |
351f65ca L |
1020 | struct elf_x86_64_link_hash_table *ret; |
1021 | bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table); | |
8d88c4ca | 1022 | |
7bf52ea2 | 1023 | ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt); |
c434dee6 | 1024 | if (ret == NULL) |
8d88c4ca NC |
1025 | return NULL; |
1026 | ||
eb4ff4d6 | 1027 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
351f65ca L |
1028 | elf_x86_64_link_hash_newfunc, |
1029 | sizeof (struct elf_x86_64_link_hash_entry), | |
4dfe6ac6 | 1030 | X86_64_ELF_DATA)) |
8d88c4ca | 1031 | { |
e2d34d7d | 1032 | free (ret); |
8d88c4ca NC |
1033 | return NULL; |
1034 | } | |
1035 | ||
351f65ca L |
1036 | if (ABI_64_P (abfd)) |
1037 | { | |
1038 | ret->r_info = elf64_r_info; | |
1039 | ret->r_sym = elf64_r_sym; | |
248775ba | 1040 | ret->pointer_r_type = R_X86_64_64; |
351f65ca L |
1041 | ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; |
1042 | ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; | |
1043 | } | |
1044 | else | |
1045 | { | |
1046 | ret->r_info = elf32_r_info; | |
1047 | ret->r_sym = elf32_r_sym; | |
248775ba | 1048 | ret->pointer_r_type = R_X86_64_32; |
351f65ca L |
1049 | ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; |
1050 | ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER; | |
1051 | } | |
1052 | ||
c25bc9fc | 1053 | ret->loc_hash_table = htab_try_create (1024, |
351f65ca L |
1054 | elf_x86_64_local_htab_hash, |
1055 | elf_x86_64_local_htab_eq, | |
c25bc9fc L |
1056 | NULL); |
1057 | ret->loc_hash_memory = objalloc_create (); | |
1058 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
1059 | { | |
d495ab0d | 1060 | elf_x86_64_link_hash_table_free (abfd); |
c25bc9fc L |
1061 | return NULL; |
1062 | } | |
d495ab0d | 1063 | ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free; |
c25bc9fc | 1064 | |
c434dee6 AJ |
1065 | return &ret->elf.root; |
1066 | } | |
1067 | ||
c434dee6 AJ |
1068 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
1069 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
1070 | hash table. */ | |
1071 | ||
b34976b6 | 1072 | static bfd_boolean |
351f65ca L |
1073 | elf_x86_64_create_dynamic_sections (bfd *dynobj, |
1074 | struct bfd_link_info *info) | |
c434dee6 | 1075 | { |
351f65ca | 1076 | struct elf_x86_64_link_hash_table *htab; |
c434dee6 | 1077 | |
c434dee6 | 1078 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 1079 | return FALSE; |
c434dee6 | 1080 | |
351f65ca | 1081 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1082 | if (htab == NULL) |
1083 | return FALSE; | |
1084 | ||
3d4d4302 | 1085 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
9a926d55 | 1086 | if (!htab->sdynbss) |
c434dee6 AJ |
1087 | abort (); |
1088 | ||
0e1862bb | 1089 | if (bfd_link_executable (info)) |
9a926d55 L |
1090 | { |
1091 | /* Always allow copy relocs for building executables. */ | |
9d157cb9 | 1092 | asection *s = bfd_get_linker_section (dynobj, ".rela.bss"); |
9a926d55 L |
1093 | if (s == NULL) |
1094 | { | |
1095 | const struct elf_backend_data *bed = get_elf_backend_data (dynobj); | |
1096 | s = bfd_make_section_anyway_with_flags (dynobj, | |
1097 | ".rela.bss", | |
1098 | (bed->dynamic_sec_flags | |
1099 | | SEC_READONLY)); | |
1100 | if (s == NULL | |
1101 | || ! bfd_set_section_alignment (dynobj, s, | |
1102 | bed->s->log_file_align)) | |
1103 | return FALSE; | |
1104 | } | |
1105 | htab->srelbss = s; | |
1106 | } | |
1107 | ||
e41b3a13 | 1108 | if (!info->no_ld_generated_unwind_info |
2fe0fd06 | 1109 | && htab->plt_eh_frame == NULL |
e4de50d4 | 1110 | && htab->elf.splt != NULL) |
e41b3a13 | 1111 | { |
bbf96e4e L |
1112 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
1113 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1114 | | SEC_LINKER_CREATED); | |
e41b3a13 | 1115 | htab->plt_eh_frame |
bbf96e4e | 1116 | = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags); |
e41b3a13 JJ |
1117 | if (htab->plt_eh_frame == NULL |
1118 | || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3)) | |
1119 | return FALSE; | |
e41b3a13 | 1120 | } |
b34976b6 | 1121 | return TRUE; |
c434dee6 AJ |
1122 | } |
1123 | ||
1124 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
1125 | ||
1126 | static void | |
351f65ca L |
1127 | elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
1128 | struct elf_link_hash_entry *dir, | |
1129 | struct elf_link_hash_entry *ind) | |
c434dee6 | 1130 | { |
351f65ca | 1131 | struct elf_x86_64_link_hash_entry *edir, *eind; |
c434dee6 | 1132 | |
351f65ca L |
1133 | edir = (struct elf_x86_64_link_hash_entry *) dir; |
1134 | eind = (struct elf_x86_64_link_hash_entry *) ind; | |
c434dee6 | 1135 | |
0ff2b86e L |
1136 | if (!edir->has_bnd_reloc) |
1137 | edir->has_bnd_reloc = eind->has_bnd_reloc; | |
1138 | ||
c434dee6 AJ |
1139 | if (eind->dyn_relocs != NULL) |
1140 | { | |
1141 | if (edir->dyn_relocs != NULL) | |
1142 | { | |
e03a8ed8 L |
1143 | struct elf_dyn_relocs **pp; |
1144 | struct elf_dyn_relocs *p; | |
c434dee6 | 1145 | |
fcfa13d2 | 1146 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
1147 | list. Merge any entries against the same section. */ |
1148 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1149 | { | |
e03a8ed8 | 1150 | struct elf_dyn_relocs *q; |
c434dee6 AJ |
1151 | |
1152 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1153 | if (q->sec == p->sec) | |
1154 | { | |
1155 | q->pc_count += p->pc_count; | |
1156 | q->count += p->count; | |
1157 | *pp = p->next; | |
1158 | break; | |
1159 | } | |
1160 | if (q == NULL) | |
1161 | pp = &p->next; | |
1162 | } | |
1163 | *pp = edir->dyn_relocs; | |
1164 | } | |
1165 | ||
1166 | edir->dyn_relocs = eind->dyn_relocs; | |
1167 | eind->dyn_relocs = NULL; | |
1168 | } | |
1169 | ||
bffbf940 JJ |
1170 | if (ind->root.type == bfd_link_hash_indirect |
1171 | && dir->got.refcount <= 0) | |
1172 | { | |
1173 | edir->tls_type = eind->tls_type; | |
1174 | eind->tls_type = GOT_UNKNOWN; | |
1175 | } | |
1176 | ||
d40d037c AJ |
1177 | if (ELIMINATE_COPY_RELOCS |
1178 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1179 | && dir->dynamic_adjusted) |
1180 | { | |
1181 | /* If called to transfer flags for a weakdef during processing | |
1182 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1183 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
1184 | dir->ref_dynamic |= ind->ref_dynamic; | |
1185 | dir->ref_regular |= ind->ref_regular; | |
1186 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1187 | dir->needs_plt |= ind->needs_plt; | |
1188 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1189 | } | |
d40d037c | 1190 | else |
04ebc307 L |
1191 | { |
1192 | if (eind->func_pointer_refcount > 0) | |
1193 | { | |
1194 | edir->func_pointer_refcount += eind->func_pointer_refcount; | |
1195 | eind->func_pointer_refcount = 0; | |
1196 | } | |
1197 | ||
1198 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
1199 | } | |
8d88c4ca NC |
1200 | } |
1201 | ||
b34976b6 | 1202 | static bfd_boolean |
27482721 | 1203 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 1204 | { |
8d88c4ca NC |
1205 | /* Set the right machine number for an x86-64 elf64 file. */ |
1206 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 1207 | return TRUE; |
8d88c4ca NC |
1208 | } |
1209 | ||
8059fb19 RM |
1210 | static bfd_boolean |
1211 | elf32_x86_64_elf_object_p (bfd *abfd) | |
1212 | { | |
1213 | /* Set the right machine number for an x86-64 elf32 file. */ | |
1214 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
1215 | return TRUE; | |
1216 | } | |
1217 | ||
142411ca L |
1218 | /* Return TRUE if the TLS access code sequence support transition |
1219 | from R_TYPE. */ | |
1220 | ||
1221 | static bfd_boolean | |
351f65ca L |
1222 | elf_x86_64_check_tls_transition (bfd *abfd, |
1223 | struct bfd_link_info *info, | |
1224 | asection *sec, | |
1225 | bfd_byte *contents, | |
1226 | Elf_Internal_Shdr *symtab_hdr, | |
1227 | struct elf_link_hash_entry **sym_hashes, | |
1228 | unsigned int r_type, | |
1229 | const Elf_Internal_Rela *rel, | |
1230 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1231 | { |
142411ca L |
1232 | unsigned int val; |
1233 | unsigned long r_symndx; | |
5c98a14e | 1234 | bfd_boolean largepic = FALSE; |
142411ca L |
1235 | struct elf_link_hash_entry *h; |
1236 | bfd_vma offset; | |
351f65ca | 1237 | struct elf_x86_64_link_hash_table *htab; |
142411ca L |
1238 | |
1239 | /* Get the section contents. */ | |
1240 | if (contents == NULL) | |
1241 | { | |
1242 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1243 | contents = elf_section_data (sec)->this_hdr.contents; | |
1244 | else | |
1245 | { | |
1246 | /* FIXME: How to better handle error condition? */ | |
1247 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1248 | return FALSE; | |
bffbf940 | 1249 | |
142411ca L |
1250 | /* Cache the section contents for elf_link_input_bfd. */ |
1251 | elf_section_data (sec)->this_hdr.contents = contents; | |
1252 | } | |
1253 | } | |
1254 | ||
351f65ca | 1255 | htab = elf_x86_64_hash_table (info); |
142411ca | 1256 | offset = rel->r_offset; |
bffbf940 | 1257 | switch (r_type) |
142411ca L |
1258 | { |
1259 | case R_X86_64_TLSGD: | |
1260 | case R_X86_64_TLSLD: | |
1261 | if ((rel + 1) >= relend) | |
1262 | return FALSE; | |
1263 | ||
1264 | if (r_type == R_X86_64_TLSGD) | |
1265 | { | |
52bc799a | 1266 | /* Check transition from GD access model. For 64bit, only |
142411ca L |
1267 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
1268 | .word 0x6666; rex64; call __tls_get_addr | |
52bc799a L |
1269 | can transit to different access model. For 32bit, only |
1270 | leaq foo@tlsgd(%rip), %rdi | |
1271 | .word 0x6666; rex64; call __tls_get_addr | |
5c98a14e JJ |
1272 | can transit to different access model. For largepic |
1273 | we also support: | |
1274 | leaq foo@tlsgd(%rip), %rdi | |
1275 | movabsq $__tls_get_addr@pltoff, %rax | |
1276 | addq $rbx, %rax | |
1277 | call *%rax. */ | |
142411ca | 1278 | |
fa289a5f AM |
1279 | static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 }; |
1280 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; | |
1281 | ||
5c98a14e | 1282 | if ((offset + 12) > sec->size) |
142411ca | 1283 | return FALSE; |
52bc799a | 1284 | |
5c98a14e JJ |
1285 | if (memcmp (contents + offset + 4, call, 4) != 0) |
1286 | { | |
1287 | if (!ABI_64_P (abfd) | |
1288 | || (offset + 19) > sec->size | |
1289 | || offset < 3 | |
1290 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0 | |
1291 | || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0 | |
1292 | || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5) | |
1293 | != 0) | |
1294 | return FALSE; | |
1295 | largepic = TRUE; | |
1296 | } | |
1297 | else if (ABI_64_P (abfd)) | |
52bc799a | 1298 | { |
52bc799a | 1299 | if (offset < 4 |
fa289a5f | 1300 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1301 | return FALSE; |
1302 | } | |
1303 | else | |
1304 | { | |
52bc799a | 1305 | if (offset < 3 |
fa289a5f | 1306 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1307 | return FALSE; |
1308 | } | |
142411ca L |
1309 | } |
1310 | else | |
1311 | { | |
1312 | /* Check transition from LD access model. Only | |
1313 | leaq foo@tlsld(%rip), %rdi; | |
1314 | call __tls_get_addr | |
5c98a14e JJ |
1315 | can transit to different access model. For largepic |
1316 | we also support: | |
1317 | leaq foo@tlsld(%rip), %rdi | |
1318 | movabsq $__tls_get_addr@pltoff, %rax | |
1319 | addq $rbx, %rax | |
1320 | call *%rax. */ | |
142411ca | 1321 | |
fa289a5f | 1322 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1323 | |
1324 | if (offset < 3 || (offset + 9) > sec->size) | |
1325 | return FALSE; | |
1326 | ||
5c98a14e | 1327 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
142411ca | 1328 | return FALSE; |
5c98a14e JJ |
1329 | |
1330 | if (0xe8 != *(contents + offset + 4)) | |
1331 | { | |
1332 | if (!ABI_64_P (abfd) | |
1333 | || (offset + 19) > sec->size | |
1334 | || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0 | |
1335 | || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5) | |
1336 | != 0) | |
1337 | return FALSE; | |
1338 | largepic = TRUE; | |
1339 | } | |
142411ca L |
1340 | } |
1341 | ||
351f65ca | 1342 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1343 | if (r_symndx < symtab_hdr->sh_info) |
1344 | return FALSE; | |
1345 | ||
1346 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
c4fb387b | 1347 | /* Use strncmp to check __tls_get_addr since __tls_get_addr |
eed180f8 | 1348 | may be versioned. */ |
142411ca L |
1349 | return (h != NULL |
1350 | && h->root.root.string != NULL | |
5c98a14e JJ |
1351 | && (largepic |
1352 | ? ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64 | |
1353 | : (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32 | |
1354 | || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32)) | |
c4fb387b L |
1355 | && (strncmp (h->root.root.string, |
1356 | "__tls_get_addr", 14) == 0)); | |
142411ca L |
1357 | |
1358 | case R_X86_64_GOTTPOFF: | |
1359 | /* Check transition from IE access model: | |
4a4c5f25 L |
1360 | mov foo@gottpoff(%rip), %reg |
1361 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1362 | */ |
1363 | ||
4a4c5f25 L |
1364 | /* Check REX prefix first. */ |
1365 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1366 | { | |
1367 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1368 | if (val != 0x48 && val != 0x4c) | |
1369 | { | |
1370 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1371 | if (ABI_64_P (abfd)) | |
1372 | return FALSE; | |
1373 | } | |
1374 | } | |
1375 | else | |
1376 | { | |
1377 | /* X32 may not have any REX prefix. */ | |
1378 | if (ABI_64_P (abfd)) | |
1379 | return FALSE; | |
1380 | if (offset < 2 || (offset + 3) > sec->size) | |
1381 | return FALSE; | |
1382 | } | |
142411ca L |
1383 | |
1384 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1385 | if (val != 0x8b && val != 0x03) | |
1386 | return FALSE; | |
1387 | ||
1388 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1389 | return (val & 0xc7) == 5; | |
1390 | ||
1391 | case R_X86_64_GOTPC32_TLSDESC: | |
1392 | /* Check transition from GDesc access model: | |
1393 | leaq x@tlsdesc(%rip), %rax | |
1394 | ||
1395 | Make sure it's a leaq adding rip to a 32-bit offset | |
1396 | into any register, although it's probably almost always | |
1397 | going to be rax. */ | |
1398 | ||
1399 | if (offset < 3 || (offset + 4) > sec->size) | |
1400 | return FALSE; | |
1401 | ||
1402 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1403 | if ((val & 0xfb) != 0x48) | |
1404 | return FALSE; | |
1405 | ||
1406 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1407 | return FALSE; | |
1408 | ||
1409 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1410 | return (val & 0xc7) == 0x05; | |
1411 | ||
1412 | case R_X86_64_TLSDESC_CALL: | |
1413 | /* Check transition from GDesc access model: | |
1414 | call *x@tlsdesc(%rax) | |
1415 | */ | |
1416 | if (offset + 2 <= sec->size) | |
1417 | { | |
1418 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
fa289a5f AM |
1419 | static const unsigned char call[] = { 0xff, 0x10 }; |
1420 | return memcmp (contents + offset, call, 2) == 0; | |
142411ca L |
1421 | } |
1422 | ||
1423 | return FALSE; | |
1424 | ||
1425 | default: | |
1426 | abort (); | |
1427 | } | |
1428 | } | |
1429 | ||
1430 | /* Return TRUE if the TLS access transition is OK or no transition | |
1431 | will be performed. Update R_TYPE if there is a transition. */ | |
1432 | ||
1433 | static bfd_boolean | |
351f65ca L |
1434 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1435 | asection *sec, bfd_byte *contents, | |
1436 | Elf_Internal_Shdr *symtab_hdr, | |
1437 | struct elf_link_hash_entry **sym_hashes, | |
1438 | unsigned int *r_type, int tls_type, | |
1439 | const Elf_Internal_Rela *rel, | |
1440 | const Elf_Internal_Rela *relend, | |
1441 | struct elf_link_hash_entry *h, | |
1442 | unsigned long r_symndx) | |
142411ca L |
1443 | { |
1444 | unsigned int from_type = *r_type; | |
1445 | unsigned int to_type = from_type; | |
1446 | bfd_boolean check = TRUE; | |
1447 | ||
bb1cb422 L |
1448 | /* Skip TLS transition for functions. */ |
1449 | if (h != NULL | |
1450 | && (h->type == STT_FUNC | |
1451 | || h->type == STT_GNU_IFUNC)) | |
1452 | return TRUE; | |
1453 | ||
142411ca | 1454 | switch (from_type) |
bffbf940 JJ |
1455 | { |
1456 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1457 | case R_X86_64_GOTPC32_TLSDESC: |
1458 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1459 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1460 | if (bfd_link_executable (info)) |
142411ca L |
1461 | { |
1462 | if (h == NULL) | |
1463 | to_type = R_X86_64_TPOFF32; | |
1464 | else | |
1465 | to_type = R_X86_64_GOTTPOFF; | |
1466 | } | |
1467 | ||
351f65ca | 1468 | /* When we are called from elf_x86_64_relocate_section, |
142411ca L |
1469 | CONTENTS isn't NULL and there may be additional transitions |
1470 | based on TLS_TYPE. */ | |
1471 | if (contents != NULL) | |
1472 | { | |
1473 | unsigned int new_to_type = to_type; | |
1474 | ||
0e1862bb | 1475 | if (bfd_link_executable (info) |
142411ca L |
1476 | && h != NULL |
1477 | && h->dynindx == -1 | |
1478 | && tls_type == GOT_TLS_IE) | |
1479 | new_to_type = R_X86_64_TPOFF32; | |
1480 | ||
1481 | if (to_type == R_X86_64_TLSGD | |
1482 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1483 | || to_type == R_X86_64_TLSDESC_CALL) | |
1484 | { | |
1485 | if (tls_type == GOT_TLS_IE) | |
1486 | new_to_type = R_X86_64_GOTTPOFF; | |
1487 | } | |
1488 | ||
1489 | /* We checked the transition before when we were called from | |
351f65ca | 1490 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1491 | transition which hasn't been checked before. */ |
1492 | check = new_to_type != to_type && from_type == to_type; | |
1493 | to_type = new_to_type; | |
1494 | } | |
1495 | ||
1496 | break; | |
1497 | ||
bffbf940 | 1498 | case R_X86_64_TLSLD: |
0e1862bb | 1499 | if (bfd_link_executable (info)) |
142411ca L |
1500 | to_type = R_X86_64_TPOFF32; |
1501 | break; | |
1502 | ||
1503 | default: | |
1504 | return TRUE; | |
bffbf940 JJ |
1505 | } |
1506 | ||
142411ca L |
1507 | /* Return TRUE if there is no transition. */ |
1508 | if (from_type == to_type) | |
1509 | return TRUE; | |
1510 | ||
1511 | /* Check if the transition can be performed. */ | |
1512 | if (check | |
351f65ca L |
1513 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1514 | symtab_hdr, sym_hashes, | |
1515 | from_type, rel, relend)) | |
142411ca | 1516 | { |
2f629d23 | 1517 | reloc_howto_type *from, *to; |
4c544807 | 1518 | const char *name; |
142411ca | 1519 | |
351f65ca L |
1520 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1521 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1522 | |
4c544807 L |
1523 | if (h) |
1524 | name = h->root.root.string; | |
1525 | else | |
1526 | { | |
351f65ca | 1527 | struct elf_x86_64_link_hash_table *htab; |
4dfe6ac6 | 1528 | |
351f65ca | 1529 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1530 | if (htab == NULL) |
1531 | name = "*unknown*"; | |
1532 | else | |
1533 | { | |
1534 | Elf_Internal_Sym *isym; | |
1535 | ||
1536 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1537 | abfd, r_symndx); | |
1538 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1539 | } | |
4c544807 L |
1540 | } |
1541 | ||
142411ca L |
1542 | (*_bfd_error_handler) |
1543 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1544 | "in section `%A' failed"), | |
4c544807 | 1545 | abfd, sec, from->name, to->name, name, |
142411ca L |
1546 | (unsigned long) rel->r_offset); |
1547 | bfd_set_error (bfd_error_bad_value); | |
1548 | return FALSE; | |
1549 | } | |
1550 | ||
1551 | *r_type = to_type; | |
1552 | return TRUE; | |
bffbf940 JJ |
1553 | } |
1554 | ||
c1d11331 L |
1555 | /* Rename some of the generic section flags to better document how they |
1556 | are used here. */ | |
56ceb5b5 | 1557 | #define need_convert_load sec_flg0 |
c1d11331 | 1558 | |
70256ad8 | 1559 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1560 | calculate needed space in the global offset table, procedure |
1561 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1562 | |
b34976b6 | 1563 | static bfd_boolean |
351f65ca L |
1564 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1565 | asection *sec, | |
1566 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1567 | { |
351f65ca | 1568 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1569 | Elf_Internal_Shdr *symtab_hdr; |
1570 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1571 | const Elf_Internal_Rela *rel; |
1572 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 1573 | asection *sreloc; |
dd7e64d4 | 1574 | bfd_boolean use_plt_got; |
70256ad8 | 1575 | |
0e1862bb | 1576 | if (bfd_link_relocatable (info)) |
b34976b6 | 1577 | return TRUE; |
70256ad8 | 1578 | |
0ffa91dd NC |
1579 | BFD_ASSERT (is_x86_64_elf (abfd)); |
1580 | ||
351f65ca | 1581 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1582 | if (htab == NULL) |
1583 | return FALSE; | |
1584 | ||
dd7e64d4 L |
1585 | use_plt_got = get_elf_x86_64_backend_data (abfd) == &elf_x86_64_arch_bed; |
1586 | ||
0ffa91dd | 1587 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1588 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1589 | |
c434dee6 | 1590 | sreloc = NULL; |
cbe950e9 | 1591 | |
70256ad8 AJ |
1592 | rel_end = relocs + sec->reloc_count; |
1593 | for (rel = relocs; rel < rel_end; rel++) | |
1594 | { | |
bffbf940 | 1595 | unsigned int r_type; |
70256ad8 AJ |
1596 | unsigned long r_symndx; |
1597 | struct elf_link_hash_entry *h; | |
4c544807 L |
1598 | Elf_Internal_Sym *isym; |
1599 | const char *name; | |
06a6a421 | 1600 | bfd_boolean size_reloc; |
70256ad8 | 1601 | |
351f65ca L |
1602 | r_symndx = htab->r_sym (rel->r_info); |
1603 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1604 | |
1605 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1606 | { | |
d003868e AM |
1607 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1608 | abfd, r_symndx); | |
b34976b6 | 1609 | return FALSE; |
c434dee6 AJ |
1610 | } |
1611 | ||
70256ad8 | 1612 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1613 | { |
1614 | /* A local symbol. */ | |
c2e61a4e L |
1615 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1616 | abfd, r_symndx); | |
1617 | if (isym == NULL) | |
1618 | return FALSE; | |
c25bc9fc L |
1619 | |
1620 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1621 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1622 | { |
351f65ca L |
1623 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, |
1624 | TRUE); | |
c25bc9fc | 1625 | if (h == NULL) |
c2e61a4e | 1626 | return FALSE; |
6bbec505 | 1627 | |
c25bc9fc L |
1628 | /* Fake a STT_GNU_IFUNC symbol. */ |
1629 | h->type = STT_GNU_IFUNC; | |
1630 | h->def_regular = 1; | |
1631 | h->ref_regular = 1; | |
1632 | h->forced_local = 1; | |
1633 | h->root.type = bfd_link_hash_defined; | |
1634 | } | |
1635 | else | |
1636 | h = NULL; | |
1637 | } | |
70256ad8 | 1638 | else |
71cb9464 | 1639 | { |
4c544807 | 1640 | isym = NULL; |
71cb9464 L |
1641 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1642 | while (h->root.type == bfd_link_hash_indirect | |
1643 | || h->root.type == bfd_link_hash_warning) | |
1644 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1645 | } |
cbe950e9 | 1646 | |
d1534d16 L |
1647 | /* Check invalid x32 relocations. */ |
1648 | if (!ABI_64_P (abfd)) | |
1649 | switch (r_type) | |
1650 | { | |
1651 | default: | |
1652 | break; | |
1653 | ||
d1534d16 L |
1654 | case R_X86_64_DTPOFF64: |
1655 | case R_X86_64_TPOFF64: | |
1656 | case R_X86_64_PC64: | |
1657 | case R_X86_64_GOTOFF64: | |
1658 | case R_X86_64_GOT64: | |
1659 | case R_X86_64_GOTPCREL64: | |
1660 | case R_X86_64_GOTPC64: | |
1661 | case R_X86_64_GOTPLT64: | |
1662 | case R_X86_64_PLTOFF64: | |
1663 | { | |
1664 | if (h) | |
1665 | name = h->root.root.string; | |
1666 | else | |
1667 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1668 | NULL); | |
1669 | (*_bfd_error_handler) | |
1670 | (_("%B: relocation %s against symbol `%s' isn't " | |
1671 | "supported in x32 mode"), abfd, | |
1672 | x86_64_elf_howto_table[r_type].name, name); | |
1673 | bfd_set_error (bfd_error_bad_value); | |
1674 | return FALSE; | |
1675 | } | |
1676 | break; | |
1677 | } | |
1678 | ||
c25bc9fc L |
1679 | if (h != NULL) |
1680 | { | |
cbe950e9 L |
1681 | /* Create the ifunc sections for static executables. If we |
1682 | never see an indirect function symbol nor we are building | |
1683 | a static executable, those sections will be empty and | |
1684 | won't appear in output. */ | |
1685 | switch (r_type) | |
1686 | { | |
1687 | default: | |
1688 | break; | |
1689 | ||
0ff2b86e L |
1690 | case R_X86_64_PC32_BND: |
1691 | case R_X86_64_PLT32_BND: | |
d258b828 IZ |
1692 | case R_X86_64_PC32: |
1693 | case R_X86_64_PLT32: | |
1694 | case R_X86_64_32: | |
1695 | case R_X86_64_64: | |
0ff2b86e L |
1696 | /* MPX PLT is supported only if elf_x86_64_arch_bed |
1697 | is used in 64-bit mode. */ | |
1698 | if (ABI_64_P (abfd) | |
d258b828 IZ |
1699 | && info->bndplt |
1700 | && (get_elf_x86_64_backend_data (abfd) | |
1701 | == &elf_x86_64_arch_bed)) | |
0ff2b86e | 1702 | { |
bc696fd5 | 1703 | elf_x86_64_hash_entry (h)->has_bnd_reloc = 1; |
0ff2b86e L |
1704 | |
1705 | /* Create the second PLT for Intel MPX support. */ | |
1706 | if (htab->plt_bnd == NULL) | |
1707 | { | |
1708 | unsigned int plt_bnd_align; | |
1709 | const struct elf_backend_data *bed; | |
1710 | ||
1711 | bed = get_elf_backend_data (info->output_bfd); | |
6db50b4c L |
1712 | BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry) == 8 |
1713 | && (sizeof (elf_x86_64_bnd_plt2_entry) | |
1714 | == sizeof (elf_x86_64_legacy_plt2_entry))); | |
1715 | plt_bnd_align = 3; | |
0ff2b86e L |
1716 | |
1717 | if (htab->elf.dynobj == NULL) | |
1718 | htab->elf.dynobj = abfd; | |
1719 | htab->plt_bnd | |
1720 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
1721 | ".plt.bnd", | |
1722 | (bed->dynamic_sec_flags | |
1723 | | SEC_ALLOC | |
1724 | | SEC_CODE | |
1725 | | SEC_LOAD | |
1726 | | SEC_READONLY)); | |
1727 | if (htab->plt_bnd == NULL | |
1728 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
1729 | htab->plt_bnd, | |
1730 | plt_bnd_align)) | |
1731 | return FALSE; | |
1732 | } | |
1733 | } | |
1734 | ||
cbe950e9 | 1735 | case R_X86_64_32S: |
cbe950e9 | 1736 | case R_X86_64_PC64: |
cbe950e9 | 1737 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
1738 | case R_X86_64_GOTPCRELX: |
1739 | case R_X86_64_REX_GOTPCRELX: | |
cbe950e9 | 1740 | case R_X86_64_GOTPCREL64: |
9d4057ee AM |
1741 | if (htab->elf.dynobj == NULL) |
1742 | htab->elf.dynobj = abfd; | |
1743 | if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) | |
c2e61a4e | 1744 | return FALSE; |
cbe950e9 L |
1745 | break; |
1746 | } | |
1747 | ||
ad1e85de L |
1748 | /* It is referenced by a non-shared object. */ |
1749 | h->ref_regular = 1; | |
61315175 | 1750 | h->root.non_ir_ref = 1; |
13a2df29 L |
1751 | |
1752 | if (h->type == STT_GNU_IFUNC) | |
1753 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
1754 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 1755 | } |
70256ad8 | 1756 | |
351f65ca L |
1757 | if (! elf_x86_64_tls_transition (info, abfd, sec, NULL, |
1758 | symtab_hdr, sym_hashes, | |
1759 | &r_type, GOT_UNKNOWN, | |
1760 | rel, rel_end, h, r_symndx)) | |
c2e61a4e | 1761 | return FALSE; |
142411ca | 1762 | |
bffbf940 | 1763 | switch (r_type) |
70256ad8 | 1764 | { |
bffbf940 JJ |
1765 | case R_X86_64_TLSLD: |
1766 | htab->tls_ld_got.refcount += 1; | |
1767 | goto create_got; | |
1768 | ||
1769 | case R_X86_64_TPOFF32: | |
0e1862bb | 1770 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
70256ad8 | 1771 | { |
09a24cbf | 1772 | if (h) |
4c544807 L |
1773 | name = h->root.root.string; |
1774 | else | |
1775 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1776 | NULL); | |
bffbf940 | 1777 | (*_bfd_error_handler) |
d003868e AM |
1778 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
1779 | abfd, | |
4c544807 | 1780 | x86_64_elf_howto_table[r_type].name, name); |
bffbf940 | 1781 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1782 | return FALSE; |
70256ad8 | 1783 | } |
bffbf940 | 1784 | break; |
c434dee6 | 1785 | |
bffbf940 | 1786 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1787 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
1788 | info->flags |= DF_STATIC_TLS; |
1789 | /* Fall through */ | |
70256ad8 | 1790 | |
bffbf940 JJ |
1791 | case R_X86_64_GOT32: |
1792 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
1793 | case R_X86_64_GOTPCRELX: |
1794 | case R_X86_64_REX_GOTPCRELX: | |
bffbf940 | 1795 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
1796 | case R_X86_64_GOT64: |
1797 | case R_X86_64_GOTPCREL64: | |
1798 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
1799 | case R_X86_64_GOTPC32_TLSDESC: |
1800 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
1801 | /* This symbol requires a global offset table entry. */ |
1802 | { | |
1803 | int tls_type, old_tls_type; | |
1804 | ||
1805 | switch (r_type) | |
1806 | { | |
1807 | default: tls_type = GOT_NORMAL; break; | |
1808 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
1809 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
1810 | case R_X86_64_GOTPC32_TLSDESC: |
1811 | case R_X86_64_TLSDESC_CALL: | |
1812 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
1813 | } |
1814 | ||
1815 | if (h != NULL) | |
1816 | { | |
1817 | h->got.refcount += 1; | |
351f65ca | 1818 | old_tls_type = elf_x86_64_hash_entry (h)->tls_type; |
bffbf940 JJ |
1819 | } |
1820 | else | |
1821 | { | |
1822 | bfd_signed_vma *local_got_refcounts; | |
1823 | ||
1824 | /* This is a global offset table entry for a local symbol. */ | |
1825 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1826 | if (local_got_refcounts == NULL) | |
1827 | { | |
1828 | bfd_size_type size; | |
1829 | ||
1830 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1831 | size *= sizeof (bfd_signed_vma) |
1832 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
1833 | local_got_refcounts = ((bfd_signed_vma *) |
1834 | bfd_zalloc (abfd, size)); | |
1835 | if (local_got_refcounts == NULL) | |
c2e61a4e | 1836 | return FALSE; |
bffbf940 | 1837 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
351f65ca | 1838 | elf_x86_64_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 1839 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
351f65ca | 1840 | elf_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 1841 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
1842 | } |
1843 | local_got_refcounts[r_symndx] += 1; | |
1844 | old_tls_type | |
351f65ca | 1845 | = elf_x86_64_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
1846 | } |
1847 | ||
1848 | /* If a TLS symbol is accessed using IE at least once, | |
1849 | there is no point to use dynamic model for it. */ | |
1850 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
1851 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
1852 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 1853 | { |
67a4f2b7 | 1854 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 1855 | tls_type = old_tls_type; |
67a4f2b7 AO |
1856 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1857 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1858 | tls_type |= old_tls_type; | |
bffbf940 JJ |
1859 | else |
1860 | { | |
09a24cbf | 1861 | if (h) |
4c544807 L |
1862 | name = h->root.root.string; |
1863 | else | |
1864 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
1865 | isym, NULL); | |
bffbf940 | 1866 | (*_bfd_error_handler) |
1f7a4e42 | 1867 | (_("%B: '%s' accessed both as normal and thread local symbol"), |
4c544807 | 1868 | abfd, name); |
68c4a57e | 1869 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1870 | return FALSE; |
bffbf940 JJ |
1871 | } |
1872 | } | |
1873 | ||
1874 | if (old_tls_type != tls_type) | |
1875 | { | |
1876 | if (h != NULL) | |
351f65ca | 1877 | elf_x86_64_hash_entry (h)->tls_type = tls_type; |
bffbf940 | 1878 | else |
351f65ca | 1879 | elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
1880 | } |
1881 | } | |
c434dee6 AJ |
1882 | /* Fall through */ |
1883 | ||
d6ab8113 JB |
1884 | case R_X86_64_GOTOFF64: |
1885 | case R_X86_64_GOTPC32: | |
7b81dfbb | 1886 | case R_X86_64_GOTPC64: |
bffbf940 | 1887 | create_got: |
6de2ae4a | 1888 | if (htab->elf.sgot == NULL) |
c434dee6 AJ |
1889 | { |
1890 | if (htab->elf.dynobj == NULL) | |
1891 | htab->elf.dynobj = abfd; | |
6de2ae4a L |
1892 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, |
1893 | info)) | |
c2e61a4e | 1894 | return FALSE; |
c434dee6 | 1895 | } |
70256ad8 AJ |
1896 | break; |
1897 | ||
1898 | case R_X86_64_PLT32: | |
c3320543 | 1899 | case R_X86_64_PLT32_BND: |
70256ad8 | 1900 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
1901 | actually build the entry in adjust_dynamic_symbol, |
1902 | because this might be a case of linking PIC code which is | |
1903 | never referenced by a dynamic object, in which case we | |
1904 | don't need to generate a procedure linkage table entry | |
1905 | after all. */ | |
70256ad8 AJ |
1906 | |
1907 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 1908 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
1909 | if (h == NULL) |
1910 | continue; | |
1911 | ||
f5385ebf | 1912 | h->needs_plt = 1; |
51b64d56 | 1913 | h->plt.refcount += 1; |
70256ad8 AJ |
1914 | break; |
1915 | ||
7b81dfbb AJ |
1916 | case R_X86_64_PLTOFF64: |
1917 | /* This tries to form the 'address' of a function relative | |
1918 | to GOT. For global symbols we need a PLT entry. */ | |
1919 | if (h != NULL) | |
1920 | { | |
1921 | h->needs_plt = 1; | |
1922 | h->plt.refcount += 1; | |
1923 | } | |
1924 | goto create_got; | |
1925 | ||
6a3e1bae L |
1926 | case R_X86_64_SIZE32: |
1927 | case R_X86_64_SIZE64: | |
06a6a421 | 1928 | size_reloc = TRUE; |
6a3e1bae L |
1929 | goto do_size; |
1930 | ||
248775ba L |
1931 | case R_X86_64_32: |
1932 | if (!ABI_64_P (abfd)) | |
1933 | goto pointer; | |
cc78d0af AJ |
1934 | case R_X86_64_8: |
1935 | case R_X86_64_16: | |
70256ad8 | 1936 | case R_X86_64_32S: |
1b71fb54 AJ |
1937 | /* Let's help debug shared library creation. These relocs |
1938 | cannot be used in shared libs. Don't error out for | |
1939 | sections we don't care about, such as debug sections or | |
1940 | non-constant sections. */ | |
0e1862bb | 1941 | if (bfd_link_pic (info) |
1b71fb54 AJ |
1942 | && (sec->flags & SEC_ALLOC) != 0 |
1943 | && (sec->flags & SEC_READONLY) != 0) | |
1944 | { | |
09a24cbf | 1945 | if (h) |
4c544807 L |
1946 | name = h->root.root.string; |
1947 | else | |
1948 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1b71fb54 | 1949 | (*_bfd_error_handler) |
d003868e | 1950 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
4c544807 | 1951 | abfd, x86_64_elf_howto_table[r_type].name, name); |
1b71fb54 | 1952 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1953 | return FALSE; |
1b71fb54 AJ |
1954 | } |
1955 | /* Fall through. */ | |
1956 | ||
c434dee6 AJ |
1957 | case R_X86_64_PC8: |
1958 | case R_X86_64_PC16: | |
70256ad8 | 1959 | case R_X86_64_PC32: |
c3320543 | 1960 | case R_X86_64_PC32_BND: |
d6ab8113 | 1961 | case R_X86_64_PC64: |
1b71fb54 | 1962 | case R_X86_64_64: |
248775ba | 1963 | pointer: |
0e1862bb | 1964 | if (h != NULL && bfd_link_executable (info)) |
c434dee6 AJ |
1965 | { |
1966 | /* If this reloc is in a read-only section, we might | |
1967 | need a copy reloc. We can't check reliably at this | |
1968 | stage whether the section is read-only, as input | |
1969 | sections have not yet been mapped to output sections. | |
1970 | Tentatively set the flag for now, and correct in | |
1971 | adjust_dynamic_symbol. */ | |
f5385ebf | 1972 | h->non_got_ref = 1; |
c434dee6 AJ |
1973 | |
1974 | /* We may need a .plt entry if the function this reloc | |
1975 | refers to is in a shared lib. */ | |
1976 | h->plt.refcount += 1; | |
5db4f0d3 L |
1977 | if (r_type == R_X86_64_PC32) |
1978 | { | |
1979 | /* Since something like ".long foo - ." may be used | |
1980 | as pointer, make sure that PLT is used if foo is | |
1981 | a function defined in a shared library. */ | |
1982 | if ((sec->flags & SEC_CODE) == 0) | |
1983 | h->pointer_equality_needed = 1; | |
1984 | } | |
1985 | else if (r_type != R_X86_64_PC32_BND | |
1986 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
1987 | { |
1988 | h->pointer_equality_needed = 1; | |
1989 | /* At run-time, R_X86_64_64 can be resolved for both | |
1990 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
1991 | can only be resolved for x32. */ | |
1992 | if ((sec->flags & SEC_READONLY) == 0 | |
1993 | && (r_type == R_X86_64_64 | |
1994 | || (!ABI_64_P (abfd) | |
1995 | && (r_type == R_X86_64_32 | |
1996 | || r_type == R_X86_64_32S)))) | |
1997 | { | |
1998 | struct elf_x86_64_link_hash_entry *eh | |
1999 | = (struct elf_x86_64_link_hash_entry *) h; | |
2000 | eh->func_pointer_refcount += 1; | |
2001 | } | |
2002 | } | |
c434dee6 | 2003 | } |
70256ad8 | 2004 | |
06a6a421 | 2005 | size_reloc = FALSE; |
6a3e1bae | 2006 | do_size: |
70256ad8 AJ |
2007 | /* If we are creating a shared library, and this is a reloc |
2008 | against a global symbol, or a non PC relative reloc | |
2009 | against a local symbol, then we need to copy the reloc | |
2010 | into the shared library. However, if we are linking with | |
2011 | -Bsymbolic, we do not need to copy a reloc against a | |
2012 | global symbol which is defined in an object we are | |
407443a3 | 2013 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
2014 | this point we have not seen all the input files, so it is |
2015 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
2016 | later (it is never cleared). In case of a weak definition, |
2017 | DEF_REGULAR may be cleared later by a strong definition in | |
2018 | a shared library. We account for that possibility below by | |
2019 | storing information in the relocs_copied field of the hash | |
2020 | table entry. A similar situation occurs when creating | |
2021 | shared libraries and symbol visibility changes render the | |
31c0ebfe | 2022 | symbol local. |
c434dee6 AJ |
2023 | |
2024 | If on the other hand, we are creating an executable, we | |
2025 | may need to keep relocations for symbols satisfied by a | |
2026 | dynamic library if we manage to avoid copy relocs for the | |
0f88be7a | 2027 | symbol. */ |
0e1862bb | 2028 | if ((bfd_link_pic (info) |
c434dee6 | 2029 | && (sec->flags & SEC_ALLOC) != 0 |
d8045f23 | 2030 | && (! IS_X86_64_PCREL_TYPE (r_type) |
c434dee6 | 2031 | || (h != NULL |
55255dae | 2032 | && (! SYMBOLIC_BIND (info, h) |
c434dee6 | 2033 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 2034 | || !h->def_regular)))) |
d40d037c | 2035 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 2036 | && !bfd_link_pic (info) |
c434dee6 AJ |
2037 | && (sec->flags & SEC_ALLOC) != 0 |
2038 | && h != NULL | |
2039 | && (h->root.type == bfd_link_hash_defweak | |
0f88be7a | 2040 | || !h->def_regular))) |
70256ad8 | 2041 | { |
e03a8ed8 L |
2042 | struct elf_dyn_relocs *p; |
2043 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2044 | |
2045 | /* We must copy these reloc types into the output file. | |
2046 | Create a reloc section in dynobj and make room for | |
2047 | this reloc. */ | |
70256ad8 AJ |
2048 | if (sreloc == NULL) |
2049 | { | |
c434dee6 AJ |
2050 | if (htab->elf.dynobj == NULL) |
2051 | htab->elf.dynobj = abfd; | |
2052 | ||
83bac4b0 | 2053 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
2054 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
2055 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 2056 | |
70256ad8 | 2057 | if (sreloc == NULL) |
c2e61a4e | 2058 | return FALSE; |
70256ad8 AJ |
2059 | } |
2060 | ||
c434dee6 AJ |
2061 | /* If this is a global symbol, we count the number of |
2062 | relocations we need for this symbol. */ | |
2063 | if (h != NULL) | |
70256ad8 | 2064 | { |
351f65ca | 2065 | head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs; |
c434dee6 AJ |
2066 | } |
2067 | else | |
2068 | { | |
2069 | /* Track dynamic relocs needed for local syms too. | |
2070 | We really need local syms available to do this | |
2071 | easily. Oh well. */ | |
c434dee6 | 2072 | asection *s; |
87d72d41 | 2073 | void **vpp; |
87d72d41 AM |
2074 | |
2075 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2076 | abfd, r_symndx); | |
2077 | if (isym == NULL) | |
2078 | return FALSE; | |
2079 | ||
2080 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2081 | if (s == NULL) |
87d72d41 | 2082 | s = sec; |
70256ad8 | 2083 | |
e81d3500 DD |
2084 | /* Beware of type punned pointers vs strict aliasing |
2085 | rules. */ | |
2086 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2087 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2088 | } |
70256ad8 | 2089 | |
c434dee6 AJ |
2090 | p = *head; |
2091 | if (p == NULL || p->sec != sec) | |
2092 | { | |
2093 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 2094 | |
e03a8ed8 | 2095 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2096 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2097 | if (p == NULL) |
c2e61a4e | 2098 | return FALSE; |
c434dee6 AJ |
2099 | p->next = *head; |
2100 | *head = p; | |
2101 | p->sec = sec; | |
2102 | p->count = 0; | |
2103 | p->pc_count = 0; | |
70256ad8 | 2104 | } |
c434dee6 AJ |
2105 | |
2106 | p->count += 1; | |
06a6a421 L |
2107 | /* Count size relocation as PC-relative relocation. */ |
2108 | if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc) | |
c434dee6 | 2109 | p->pc_count += 1; |
70256ad8 AJ |
2110 | } |
2111 | break; | |
fe4770f4 AJ |
2112 | |
2113 | /* This relocation describes the C++ object vtable hierarchy. | |
2114 | Reconstruct it for later use during GC. */ | |
2115 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2116 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c2e61a4e | 2117 | return FALSE; |
fe4770f4 AJ |
2118 | break; |
2119 | ||
2120 | /* This relocation describes which C++ vtable entries are actually | |
2121 | used. Record for later use during GC. */ | |
2122 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
2123 | BFD_ASSERT (h != NULL); |
2124 | if (h != NULL | |
2125 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
c2e61a4e | 2126 | return FALSE; |
fe4770f4 | 2127 | break; |
c434dee6 AJ |
2128 | |
2129 | default: | |
2130 | break; | |
70256ad8 | 2131 | } |
dd7e64d4 L |
2132 | |
2133 | if (use_plt_got | |
2134 | && h != NULL | |
2135 | && h->plt.refcount > 0 | |
8ded2ddc L |
2136 | && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
2137 | || h->got.refcount > 0) | |
dd7e64d4 L |
2138 | && htab->plt_got == NULL) |
2139 | { | |
2140 | /* Create the GOT procedure linkage table. */ | |
2141 | unsigned int plt_got_align; | |
2142 | const struct elf_backend_data *bed; | |
2143 | ||
2144 | bed = get_elf_backend_data (info->output_bfd); | |
2145 | BFD_ASSERT (sizeof (elf_x86_64_legacy_plt2_entry) == 8 | |
2146 | && (sizeof (elf_x86_64_bnd_plt2_entry) | |
2147 | == sizeof (elf_x86_64_legacy_plt2_entry))); | |
2148 | plt_got_align = 3; | |
2149 | ||
2150 | if (htab->elf.dynobj == NULL) | |
2151 | htab->elf.dynobj = abfd; | |
2152 | htab->plt_got | |
2153 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
2154 | ".plt.got", | |
2155 | (bed->dynamic_sec_flags | |
2156 | | SEC_ALLOC | |
2157 | | SEC_CODE | |
2158 | | SEC_LOAD | |
2159 | | SEC_READONLY)); | |
2160 | if (htab->plt_got == NULL | |
2161 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
2162 | htab->plt_got, | |
2163 | plt_got_align)) | |
2164 | return FALSE; | |
2165 | } | |
c1d11331 | 2166 | |
56ceb5b5 L |
2167 | if ((r_type == R_X86_64_GOTPCREL |
2168 | || r_type == R_X86_64_GOTPCRELX | |
2169 | || r_type == R_X86_64_REX_GOTPCRELX) | |
c1d11331 | 2170 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
56ceb5b5 | 2171 | sec->need_convert_load = 1; |
70256ad8 AJ |
2172 | } |
2173 | ||
b34976b6 | 2174 | return TRUE; |
70256ad8 AJ |
2175 | } |
2176 | ||
2177 | /* Return the section that should be marked against GC for a given | |
407443a3 | 2178 | relocation. */ |
70256ad8 AJ |
2179 | |
2180 | static asection * | |
351f65ca L |
2181 | elf_x86_64_gc_mark_hook (asection *sec, |
2182 | struct bfd_link_info *info, | |
2183 | Elf_Internal_Rela *rel, | |
2184 | struct elf_link_hash_entry *h, | |
2185 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
2186 | { |
2187 | if (h != NULL) | |
351f65ca | 2188 | switch (ELF32_R_TYPE (rel->r_info)) |
07adf181 AM |
2189 | { |
2190 | case R_X86_64_GNU_VTINHERIT: | |
2191 | case R_X86_64_GNU_VTENTRY: | |
2192 | return NULL; | |
2193 | } | |
2194 | ||
2195 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
2196 | } |
2197 | ||
407443a3 | 2198 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 | 2199 | |
b34976b6 | 2200 | static bfd_boolean |
351f65ca L |
2201 | elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, |
2202 | asection *sec, | |
2203 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 2204 | { |
351f65ca | 2205 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2206 | Elf_Internal_Shdr *symtab_hdr; |
2207 | struct elf_link_hash_entry **sym_hashes; | |
2208 | bfd_signed_vma *local_got_refcounts; | |
2209 | const Elf_Internal_Rela *rel, *relend; | |
c434dee6 | 2210 | |
0e1862bb | 2211 | if (bfd_link_relocatable (info)) |
7dda2462 TG |
2212 | return TRUE; |
2213 | ||
351f65ca | 2214 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2215 | if (htab == NULL) |
2216 | return FALSE; | |
2217 | ||
c434dee6 | 2218 | elf_section_data (sec)->local_dynrel = NULL; |
70256ad8 | 2219 | |
0ffa91dd | 2220 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 AJ |
2221 | sym_hashes = elf_sym_hashes (abfd); |
2222 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2223 | ||
351f65ca | 2224 | htab = elf_x86_64_hash_table (info); |
70256ad8 AJ |
2225 | relend = relocs + sec->reloc_count; |
2226 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
2227 | { |
2228 | unsigned long r_symndx; | |
2229 | unsigned int r_type; | |
2230 | struct elf_link_hash_entry *h = NULL; | |
04ebc307 | 2231 | bfd_boolean pointer_reloc; |
70256ad8 | 2232 | |
351f65ca | 2233 | r_symndx = htab->r_sym (rel->r_info); |
26e41594 AM |
2234 | if (r_symndx >= symtab_hdr->sh_info) |
2235 | { | |
26e41594 | 2236 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
2237 | while (h->root.type == bfd_link_hash_indirect |
2238 | || h->root.type == bfd_link_hash_warning) | |
2239 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 2240 | } |
bb1cb422 L |
2241 | else |
2242 | { | |
2243 | /* A local symbol. */ | |
2244 | Elf_Internal_Sym *isym; | |
2245 | ||
2246 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2247 | abfd, r_symndx); | |
2248 | ||
2249 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
2250 | if (isym != NULL | |
82e96e07 | 2251 | && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
bb1cb422 | 2252 | { |
351f65ca | 2253 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE); |
bb1cb422 L |
2254 | if (h == NULL) |
2255 | abort (); | |
2256 | } | |
2257 | } | |
c434dee6 | 2258 | |
3db2e7dd L |
2259 | if (h) |
2260 | { | |
2261 | struct elf_x86_64_link_hash_entry *eh; | |
2262 | struct elf_dyn_relocs **pp; | |
2263 | struct elf_dyn_relocs *p; | |
2264 | ||
2265 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2266 | ||
2267 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
2268 | if (p->sec == sec) | |
2269 | { | |
2270 | /* Everything must go for SEC. */ | |
2271 | *pp = p->next; | |
2272 | break; | |
2273 | } | |
2274 | } | |
2275 | ||
351f65ca L |
2276 | r_type = ELF32_R_TYPE (rel->r_info); |
2277 | if (! elf_x86_64_tls_transition (info, abfd, sec, NULL, | |
2278 | symtab_hdr, sym_hashes, | |
2279 | &r_type, GOT_UNKNOWN, | |
2280 | rel, relend, h, r_symndx)) | |
142411ca L |
2281 | return FALSE; |
2282 | ||
04ebc307 | 2283 | pointer_reloc = FALSE; |
26e41594 AM |
2284 | switch (r_type) |
2285 | { | |
2286 | case R_X86_64_TLSLD: | |
4dfe6ac6 NC |
2287 | if (htab->tls_ld_got.refcount > 0) |
2288 | htab->tls_ld_got.refcount -= 1; | |
26e41594 | 2289 | break; |
c434dee6 | 2290 | |
26e41594 | 2291 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
2292 | case R_X86_64_GOTPC32_TLSDESC: |
2293 | case R_X86_64_TLSDESC_CALL: | |
26e41594 AM |
2294 | case R_X86_64_GOTTPOFF: |
2295 | case R_X86_64_GOT32: | |
2296 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
2297 | case R_X86_64_GOTPCRELX: |
2298 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
2299 | case R_X86_64_GOT64: |
2300 | case R_X86_64_GOTPCREL64: | |
2301 | case R_X86_64_GOTPLT64: | |
26e41594 AM |
2302 | if (h != NULL) |
2303 | { | |
2304 | if (h->got.refcount > 0) | |
2305 | h->got.refcount -= 1; | |
bb1cb422 L |
2306 | if (h->type == STT_GNU_IFUNC) |
2307 | { | |
2308 | if (h->plt.refcount > 0) | |
2309 | h->plt.refcount -= 1; | |
2310 | } | |
26e41594 AM |
2311 | } |
2312 | else if (local_got_refcounts != NULL) | |
2313 | { | |
2314 | if (local_got_refcounts[r_symndx] > 0) | |
2315 | local_got_refcounts[r_symndx] -= 1; | |
2316 | } | |
2317 | break; | |
c434dee6 | 2318 | |
26e41594 | 2319 | case R_X86_64_32: |
26e41594 | 2320 | case R_X86_64_32S: |
04ebc307 L |
2321 | pointer_reloc = !ABI_64_P (abfd); |
2322 | goto pointer; | |
2323 | ||
2324 | case R_X86_64_64: | |
2325 | pointer_reloc = TRUE; | |
2326 | case R_X86_64_8: | |
2327 | case R_X86_64_16: | |
26e41594 AM |
2328 | case R_X86_64_PC8: |
2329 | case R_X86_64_PC16: | |
2330 | case R_X86_64_PC32: | |
c3320543 | 2331 | case R_X86_64_PC32_BND: |
d6ab8113 | 2332 | case R_X86_64_PC64: |
1788fc08 L |
2333 | case R_X86_64_SIZE32: |
2334 | case R_X86_64_SIZE64: | |
04ebc307 | 2335 | pointer: |
0e1862bb | 2336 | if (bfd_link_pic (info) |
3db2e7dd | 2337 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
26e41594 AM |
2338 | break; |
2339 | /* Fall thru */ | |
c434dee6 | 2340 | |
26e41594 | 2341 | case R_X86_64_PLT32: |
c3320543 | 2342 | case R_X86_64_PLT32_BND: |
7b81dfbb | 2343 | case R_X86_64_PLTOFF64: |
26e41594 AM |
2344 | if (h != NULL) |
2345 | { | |
2346 | if (h->plt.refcount > 0) | |
2347 | h->plt.refcount -= 1; | |
04ebc307 L |
2348 | if (pointer_reloc && (sec->flags & SEC_READONLY) == 0) |
2349 | { | |
2350 | struct elf_x86_64_link_hash_entry *eh | |
2351 | = (struct elf_x86_64_link_hash_entry *) h; | |
2352 | if (eh->func_pointer_refcount > 0) | |
2353 | eh->func_pointer_refcount -= 1; | |
2354 | } | |
26e41594 AM |
2355 | } |
2356 | break; | |
70256ad8 | 2357 | |
26e41594 AM |
2358 | default: |
2359 | break; | |
2360 | } | |
2361 | } | |
70256ad8 | 2362 | |
b34976b6 | 2363 | return TRUE; |
70256ad8 AJ |
2364 | } |
2365 | ||
2366 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
2367 | regular object. The current definition is in some section of the | |
2368 | dynamic object, but we're not including those sections. We have to | |
2369 | change the definition to something the rest of the link can | |
407443a3 | 2370 | understand. */ |
70256ad8 | 2371 | |
b34976b6 | 2372 | static bfd_boolean |
351f65ca L |
2373 | elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
2374 | struct elf_link_hash_entry *h) | |
70256ad8 | 2375 | { |
351f65ca | 2376 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 | 2377 | asection *s; |
5ca5bb35 L |
2378 | struct elf_x86_64_link_hash_entry *eh; |
2379 | struct elf_dyn_relocs *p; | |
70256ad8 | 2380 | |
cbe950e9 L |
2381 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2382 | if (h->type == STT_GNU_IFUNC) | |
2383 | { | |
73bcf233 L |
2384 | /* All local STT_GNU_IFUNC references must be treate as local |
2385 | calls via local PLT. */ | |
5ca5bb35 L |
2386 | if (h->ref_regular |
2387 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2388 | { | |
73bcf233 | 2389 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2390 | struct elf_dyn_relocs **pp; |
2391 | ||
2392 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2393 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2394 | { | |
2395 | pc_count += p->pc_count; | |
2396 | p->count -= p->pc_count; | |
2397 | p->pc_count = 0; | |
73bcf233 | 2398 | count += p->count; |
5ca5bb35 L |
2399 | if (p->count == 0) |
2400 | *pp = p->next; | |
2401 | else | |
2402 | pp = &p->next; | |
2403 | } | |
2404 | ||
73bcf233 | 2405 | if (pc_count || count) |
5ca5bb35 L |
2406 | { |
2407 | h->needs_plt = 1; | |
5ca5bb35 | 2408 | h->non_got_ref = 1; |
a5479e5f L |
2409 | if (h->plt.refcount <= 0) |
2410 | h->plt.refcount = 1; | |
2411 | else | |
2412 | h->plt.refcount += 1; | |
5ca5bb35 L |
2413 | } |
2414 | } | |
2415 | ||
cbe950e9 L |
2416 | if (h->plt.refcount <= 0) |
2417 | { | |
2418 | h->plt.offset = (bfd_vma) -1; | |
2419 | h->needs_plt = 0; | |
2420 | } | |
2421 | return TRUE; | |
2422 | } | |
2423 | ||
70256ad8 AJ |
2424 | /* If this is a function, put it in the procedure linkage table. We |
2425 | will fill in the contents of the procedure linkage table later, | |
2426 | when we know the address of the .got section. */ | |
2427 | if (h->type == STT_FUNC | |
f5385ebf | 2428 | || h->needs_plt) |
70256ad8 | 2429 | { |
c434dee6 | 2430 | if (h->plt.refcount <= 0 |
27482721 AJ |
2431 | || SYMBOL_CALLS_LOCAL (info, h) |
2432 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2433 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 2434 | { |
70256ad8 AJ |
2435 | /* This case can occur if we saw a PLT32 reloc in an input |
2436 | file, but the symbol was never referred to by a dynamic | |
2437 | object, or if all references were garbage collected. In | |
2438 | such a case, we don't actually need to build a procedure | |
2439 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 2440 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2441 | h->needs_plt = 0; |
70256ad8 AJ |
2442 | } |
2443 | ||
b34976b6 | 2444 | return TRUE; |
70256ad8 | 2445 | } |
bbd7ec4a | 2446 | else |
c434dee6 AJ |
2447 | /* It's possible that we incorrectly decided a .plt reloc was |
2448 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
2449 | check_relocs. We can't decide accurately between function and | |
2450 | non-function syms in check-relocs; Objects loaded later in | |
2451 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2452 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
2453 | |
2454 | /* If this is a weak symbol, and there is a real definition, the | |
2455 | processor independent code will have arranged for us to see the | |
407443a3 | 2456 | real definition first, and we can just use the same value. */ |
f6e332e6 | 2457 | if (h->u.weakdef != NULL) |
70256ad8 | 2458 | { |
f6e332e6 AM |
2459 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2460 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2461 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2462 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 2463 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
bc696fd5 L |
2464 | { |
2465 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2466 | h->non_got_ref = h->u.weakdef->non_got_ref; | |
2467 | eh->needs_copy = h->u.weakdef->needs_copy; | |
2468 | } | |
b34976b6 | 2469 | return TRUE; |
70256ad8 AJ |
2470 | } |
2471 | ||
2472 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 2473 | is not a function. */ |
70256ad8 AJ |
2474 | |
2475 | /* If we are creating a shared library, we must presume that the | |
2476 | only references to the symbol are via the global offset table. | |
2477 | For such cases we need not do anything here; the relocations will | |
407443a3 | 2478 | be handled correctly by relocate_section. */ |
0e1862bb | 2479 | if (!bfd_link_executable (info)) |
b34976b6 | 2480 | return TRUE; |
70256ad8 AJ |
2481 | |
2482 | /* If there are no references to this symbol that do not use the | |
2483 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 2484 | if (!h->non_got_ref) |
b34976b6 | 2485 | return TRUE; |
70256ad8 | 2486 | |
c434dee6 AJ |
2487 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2488 | if (info->nocopyreloc) | |
2489 | { | |
f5385ebf | 2490 | h->non_got_ref = 0; |
b34976b6 | 2491 | return TRUE; |
c434dee6 AJ |
2492 | } |
2493 | ||
31c0ebfe | 2494 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 2495 | { |
351f65ca | 2496 | eh = (struct elf_x86_64_link_hash_entry *) h; |
d40d037c AJ |
2497 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2498 | { | |
2499 | s = p->sec->output_section; | |
2500 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2501 | break; | |
2502 | } | |
2503 | ||
2504 | /* If we didn't find any dynamic relocs in read-only sections, then | |
2505 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
2506 | if (p == NULL) | |
2507 | { | |
f5385ebf | 2508 | h->non_got_ref = 0; |
d40d037c AJ |
2509 | return TRUE; |
2510 | } | |
c434dee6 AJ |
2511 | } |
2512 | ||
70256ad8 | 2513 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 2514 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
2515 | an entry for this symbol in the .dynsym section. The dynamic |
2516 | object will contain position independent code, so all references | |
2517 | from the dynamic object to this symbol will go through the global | |
2518 | offset table. The dynamic linker will use the .dynsym entry to | |
2519 | determine the address it must put in the global offset table, so | |
2520 | both the dynamic object and the regular object will refer to the | |
2521 | same memory location for the variable. */ | |
2522 | ||
351f65ca | 2523 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2524 | if (htab == NULL) |
2525 | return FALSE; | |
70256ad8 AJ |
2526 | |
2527 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
2528 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 2529 | runtime process image. */ |
1d7e9d18 | 2530 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
70256ad8 | 2531 | { |
351f65ca L |
2532 | const struct elf_backend_data *bed; |
2533 | bed = get_elf_backend_data (info->output_bfd); | |
2534 | htab->srelbss->size += bed->s->sizeof_rela; | |
f5385ebf | 2535 | h->needs_copy = 1; |
70256ad8 AJ |
2536 | } |
2537 | ||
c434dee6 | 2538 | s = htab->sdynbss; |
70256ad8 | 2539 | |
6cabe1ea | 2540 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
70256ad8 AJ |
2541 | } |
2542 | ||
c434dee6 AJ |
2543 | /* Allocate space in .plt, .got and associated reloc sections for |
2544 | dynamic relocs. */ | |
2545 | ||
b34976b6 | 2546 | static bfd_boolean |
351f65ca | 2547 | elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
2548 | { |
2549 | struct bfd_link_info *info; | |
351f65ca L |
2550 | struct elf_x86_64_link_hash_table *htab; |
2551 | struct elf_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 2552 | struct elf_dyn_relocs *p; |
351f65ca | 2553 | const struct elf_backend_data *bed; |
eed180f8 | 2554 | unsigned int plt_entry_size; |
c434dee6 | 2555 | |
e92d460e | 2556 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2557 | return TRUE; |
c434dee6 | 2558 | |
351f65ca | 2559 | eh = (struct elf_x86_64_link_hash_entry *) h; |
e92d460e | 2560 | |
c434dee6 | 2561 | info = (struct bfd_link_info *) inf; |
351f65ca | 2562 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2563 | if (htab == NULL) |
2564 | return FALSE; | |
351f65ca | 2565 | bed = get_elf_backend_data (info->output_bfd); |
eed180f8 | 2566 | plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
c434dee6 | 2567 | |
dd7e64d4 L |
2568 | /* We can't use the GOT PLT if pointer equality is needed since |
2569 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
2570 | linker won't update the GOT slot. We will get into an infinite | |
2571 | loop at run-time. */ | |
2572 | if (htab->plt_got != NULL | |
2573 | && h->type != STT_GNU_IFUNC | |
2574 | && !h->pointer_equality_needed | |
2575 | && h->plt.refcount > 0 | |
2576 | && h->got.refcount > 0) | |
2577 | { | |
2578 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
2579 | reloctions. */ | |
2580 | h->plt.offset = (bfd_vma) -1; | |
2581 | ||
2582 | /* Use the GOT PLT. */ | |
2583 | eh->plt_got.refcount = 1; | |
2584 | } | |
2585 | ||
04ebc307 L |
2586 | /* Clear the reference count of function pointer relocations if |
2587 | symbol isn't a normal function. */ | |
2588 | if (h->type != STT_FUNC) | |
2589 | eh->func_pointer_refcount = 0; | |
2590 | ||
cbe950e9 L |
2591 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2592 | here if it is defined and referenced in a non-shared object. */ | |
2593 | if (h->type == STT_GNU_IFUNC | |
2594 | && h->def_regular) | |
0ff2b86e L |
2595 | { |
2596 | if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, | |
2597 | &eh->dyn_relocs, | |
2598 | plt_entry_size, | |
2599 | plt_entry_size, | |
2600 | GOT_ENTRY_SIZE)) | |
2601 | { | |
2602 | asection *s = htab->plt_bnd; | |
2603 | if (h->plt.offset != (bfd_vma) -1 && s != NULL) | |
2604 | { | |
2605 | /* Use the .plt.bnd section if it is created. */ | |
2606 | eh->plt_bnd.offset = s->size; | |
2607 | ||
2608 | /* Make room for this entry in the .plt.bnd section. */ | |
2609 | s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
2610 | } | |
2611 | ||
2612 | return TRUE; | |
2613 | } | |
2614 | else | |
2615 | return FALSE; | |
2616 | } | |
04ebc307 L |
2617 | /* Don't create the PLT entry if there are only function pointer |
2618 | relocations which can be resolved at run-time. */ | |
cbe950e9 | 2619 | else if (htab->elf.dynamic_sections_created |
04ebc307 L |
2620 | && (h->plt.refcount > eh->func_pointer_refcount |
2621 | || eh->plt_got.refcount > 0)) | |
c434dee6 | 2622 | { |
25070364 L |
2623 | bfd_boolean use_plt_got; |
2624 | ||
04ebc307 L |
2625 | /* Clear the reference count of function pointer relocations |
2626 | if PLT is used. */ | |
2627 | eh->func_pointer_refcount = 0; | |
2628 | ||
8ded2ddc | 2629 | if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
25070364 L |
2630 | { |
2631 | /* Don't use the regular PLT for DF_BIND_NOW. */ | |
2632 | h->plt.offset = (bfd_vma) -1; | |
2633 | ||
2634 | /* Use the GOT PLT. */ | |
2635 | h->got.refcount = 1; | |
2636 | eh->plt_got.refcount = 1; | |
2637 | } | |
2638 | ||
2639 | use_plt_got = eh->plt_got.refcount > 0; | |
dd7e64d4 | 2640 | |
c434dee6 AJ |
2641 | /* Make sure this symbol is output as a dynamic symbol. |
2642 | Undefined weak syms won't yet be marked as dynamic. */ | |
2643 | if (h->dynindx == -1 | |
f5385ebf | 2644 | && !h->forced_local) |
c434dee6 | 2645 | { |
c152c796 | 2646 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2647 | return FALSE; |
c434dee6 AJ |
2648 | } |
2649 | ||
0e1862bb | 2650 | if (bfd_link_pic (info) |
27482721 | 2651 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
c434dee6 | 2652 | { |
6de2ae4a | 2653 | asection *s = htab->elf.splt; |
0ff2b86e | 2654 | asection *bnd_s = htab->plt_bnd; |
dd7e64d4 | 2655 | asection *got_s = htab->plt_got; |
c434dee6 | 2656 | |
7c1e8d3e L |
2657 | /* If this is the first .plt entry, make room for the special |
2658 | first entry. The .plt section is used by prelink to undo | |
2659 | prelinking for dynamic relocations. */ | |
2660 | if (s->size == 0) | |
2661 | s->size = plt_entry_size; | |
2662 | ||
dd7e64d4 L |
2663 | if (use_plt_got) |
2664 | eh->plt_got.offset = got_s->size; | |
2665 | else | |
2666 | { | |
2667 | h->plt.offset = s->size; | |
2668 | if (bnd_s) | |
2669 | eh->plt_bnd.offset = bnd_s->size; | |
2670 | } | |
c434dee6 AJ |
2671 | |
2672 | /* If this symbol is not defined in a regular file, and we are | |
2673 | not generating a shared library, then set the symbol to this | |
2674 | location in the .plt. This is required to make function | |
2675 | pointers compare as equal between the normal executable and | |
2676 | the shared library. */ | |
0e1862bb | 2677 | if (! bfd_link_pic (info) |
f5385ebf | 2678 | && !h->def_regular) |
c434dee6 | 2679 | { |
dd7e64d4 | 2680 | if (use_plt_got) |
0ff2b86e | 2681 | { |
dd7e64d4 L |
2682 | /* We need to make a call to the entry of the GOT PLT |
2683 | instead of regular PLT entry. */ | |
2684 | h->root.u.def.section = got_s; | |
2685 | h->root.u.def.value = eh->plt_got.offset; | |
0ff2b86e L |
2686 | } |
2687 | else | |
2688 | { | |
dd7e64d4 L |
2689 | if (bnd_s) |
2690 | { | |
2691 | /* We need to make a call to the entry of the second | |
2692 | PLT instead of regular PLT entry. */ | |
2693 | h->root.u.def.section = bnd_s; | |
2694 | h->root.u.def.value = eh->plt_bnd.offset; | |
2695 | } | |
2696 | else | |
2697 | { | |
2698 | h->root.u.def.section = s; | |
2699 | h->root.u.def.value = h->plt.offset; | |
2700 | } | |
0ff2b86e | 2701 | } |
c434dee6 AJ |
2702 | } |
2703 | ||
2704 | /* Make room for this entry. */ | |
dd7e64d4 L |
2705 | if (use_plt_got) |
2706 | got_s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
2707 | else | |
2708 | { | |
2709 | s->size += plt_entry_size; | |
2710 | if (bnd_s) | |
2711 | bnd_s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
c434dee6 | 2712 | |
dd7e64d4 L |
2713 | /* We also need to make an entry in the .got.plt section, |
2714 | which will be placed in the .got section by the linker | |
2715 | script. */ | |
2716 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; | |
c434dee6 | 2717 | |
dd7e64d4 L |
2718 | /* We also need to make an entry in the .rela.plt |
2719 | section. */ | |
2720 | htab->elf.srelplt->size += bed->s->sizeof_rela; | |
2721 | htab->elf.srelplt->reloc_count++; | |
2722 | } | |
c434dee6 AJ |
2723 | } |
2724 | else | |
2725 | { | |
13f42277 | 2726 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 2727 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2728 | h->needs_plt = 0; |
c434dee6 AJ |
2729 | } |
2730 | } | |
2731 | else | |
2732 | { | |
13f42277 | 2733 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 2734 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2735 | h->needs_plt = 0; |
c434dee6 AJ |
2736 | } |
2737 | ||
67a4f2b7 AO |
2738 | eh->tlsdesc_got = (bfd_vma) -1; |
2739 | ||
bffbf940 JJ |
2740 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
2741 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
2742 | if (h->got.refcount > 0 | |
0e1862bb | 2743 | && bfd_link_executable (info) |
bffbf940 | 2744 | && h->dynindx == -1 |
351f65ca | 2745 | && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) |
d8045f23 NC |
2746 | { |
2747 | h->got.offset = (bfd_vma) -1; | |
2748 | } | |
bffbf940 | 2749 | else if (h->got.refcount > 0) |
c434dee6 AJ |
2750 | { |
2751 | asection *s; | |
b34976b6 | 2752 | bfd_boolean dyn; |
351f65ca | 2753 | int tls_type = elf_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
2754 | |
2755 | /* Make sure this symbol is output as a dynamic symbol. | |
2756 | Undefined weak syms won't yet be marked as dynamic. */ | |
2757 | if (h->dynindx == -1 | |
f5385ebf | 2758 | && !h->forced_local) |
c434dee6 | 2759 | { |
c152c796 | 2760 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2761 | return FALSE; |
c434dee6 AJ |
2762 | } |
2763 | ||
67a4f2b7 AO |
2764 | if (GOT_TLS_GDESC_P (tls_type)) |
2765 | { | |
6de2ae4a | 2766 | eh->tlsdesc_got = htab->elf.sgotplt->size |
351f65ca | 2767 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2768 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2769 | h->got.offset = (bfd_vma) -2; |
2770 | } | |
2771 | if (! GOT_TLS_GDESC_P (tls_type) | |
2772 | || GOT_TLS_GD_P (tls_type)) | |
2773 | { | |
6de2ae4a | 2774 | s = htab->elf.sgot; |
67a4f2b7 AO |
2775 | h->got.offset = s->size; |
2776 | s->size += GOT_ENTRY_SIZE; | |
2777 | if (GOT_TLS_GD_P (tls_type)) | |
2778 | s->size += GOT_ENTRY_SIZE; | |
2779 | } | |
c434dee6 | 2780 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 JJ |
2781 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
2782 | and two if global. | |
2783 | R_X86_64_GOTTPOFF needs one dynamic relocation. */ | |
67a4f2b7 | 2784 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 2785 | || tls_type == GOT_TLS_IE) |
351f65ca | 2786 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 | 2787 | else if (GOT_TLS_GD_P (tls_type)) |
351f65ca | 2788 | htab->elf.srelgot->size += 2 * bed->s->sizeof_rela; |
67a4f2b7 AO |
2789 | else if (! GOT_TLS_GDESC_P (tls_type) |
2790 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2791 | || h->root.type != bfd_link_hash_undefweak) | |
0e1862bb | 2792 | && (bfd_link_pic (info) |
27482721 | 2793 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
351f65ca | 2794 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2795 | if (GOT_TLS_GDESC_P (tls_type)) |
2796 | { | |
351f65ca | 2797 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2798 | htab->tlsdesc_plt = (bfd_vma) -1; |
2799 | } | |
c434dee6 AJ |
2800 | } |
2801 | else | |
2802 | h->got.offset = (bfd_vma) -1; | |
2803 | ||
c434dee6 | 2804 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2805 | return TRUE; |
c434dee6 AJ |
2806 | |
2807 | /* In the shared -Bsymbolic case, discard space allocated for | |
2808 | dynamic pc-relative relocs against symbols which turn out to be | |
2809 | defined in regular objects. For the normal shared case, discard | |
2810 | space for pc-relative relocs that have become local due to symbol | |
2811 | visibility changes. */ | |
2812 | ||
0e1862bb | 2813 | if (bfd_link_pic (info)) |
c434dee6 | 2814 | { |
27482721 AJ |
2815 | /* Relocs that use pc_count are those that appear on a call |
2816 | insn, or certain REL relocs that can generated via assembly. | |
2817 | We want calls to protected symbols to resolve directly to the | |
2818 | function rather than going via the plt. If people want | |
2819 | function pointer comparisons to work as expected then they | |
2820 | should avoid writing weird assembly. */ | |
2821 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 2822 | { |
e03a8ed8 | 2823 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
2824 | |
2825 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2826 | { | |
c3ce498c L |
2827 | p->count -= p->pc_count; |
2828 | p->pc_count = 0; | |
c434dee6 AJ |
2829 | if (p->count == 0) |
2830 | *pp = p->next; | |
2831 | else | |
2832 | pp = &p->next; | |
2833 | } | |
2834 | } | |
4e795f50 AM |
2835 | |
2836 | /* Also discard relocs on undefined weak syms with non-default | |
c353e543 | 2837 | visibility. */ |
31c0ebfe | 2838 | if (eh->dyn_relocs != NULL) |
22d606e9 | 2839 | { |
31c0ebfe L |
2840 | if (h->root.type == bfd_link_hash_undefweak) |
2841 | { | |
2842 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2843 | eh->dyn_relocs = NULL; | |
2844 | ||
2845 | /* Make sure undefined weak symbols are output as a dynamic | |
2846 | symbol in PIEs. */ | |
2847 | else if (h->dynindx == -1 | |
2848 | && ! h->forced_local | |
2849 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2850 | return FALSE; | |
2851 | } | |
9d1d54d5 L |
2852 | /* For PIE, discard space for pc-relative relocs against |
2853 | symbols which turn out to need copy relocs. */ | |
0e1862bb | 2854 | else if (bfd_link_executable (info) |
bc696fd5 | 2855 | && (h->needs_copy || eh->needs_copy) |
31c0ebfe L |
2856 | && h->def_dynamic |
2857 | && !h->def_regular) | |
9d1d54d5 L |
2858 | { |
2859 | struct elf_dyn_relocs **pp; | |
2860 | ||
2861 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2862 | { | |
2863 | if (p->pc_count != 0) | |
2864 | *pp = p->next; | |
2865 | else | |
2866 | pp = &p->next; | |
2867 | } | |
2868 | } | |
22d606e9 | 2869 | } |
d8045f23 | 2870 | } |
d40d037c | 2871 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
2872 | { |
2873 | /* For the non-shared case, discard space for relocs against | |
2874 | symbols which turn out to need copy relocs or are not | |
04ebc307 L |
2875 | dynamic. Keep dynamic relocations for run-time function |
2876 | pointer initialization. */ | |
c434dee6 | 2877 | |
04ebc307 | 2878 | if ((!h->non_got_ref || eh->func_pointer_refcount > 0) |
f5385ebf AM |
2879 | && ((h->def_dynamic |
2880 | && !h->def_regular) | |
c434dee6 AJ |
2881 | || (htab->elf.dynamic_sections_created |
2882 | && (h->root.type == bfd_link_hash_undefweak | |
2883 | || h->root.type == bfd_link_hash_undefined)))) | |
2884 | { | |
2885 | /* Make sure this symbol is output as a dynamic symbol. | |
2886 | Undefined weak syms won't yet be marked as dynamic. */ | |
2887 | if (h->dynindx == -1 | |
d8045f23 NC |
2888 | && ! h->forced_local |
2889 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2890 | return FALSE; | |
c434dee6 AJ |
2891 | |
2892 | /* If that succeeded, we know we'll be keeping all the | |
2893 | relocs. */ | |
2894 | if (h->dynindx != -1) | |
2895 | goto keep; | |
2896 | } | |
2897 | ||
2898 | eh->dyn_relocs = NULL; | |
04ebc307 | 2899 | eh->func_pointer_refcount = 0; |
c434dee6 AJ |
2900 | |
2901 | keep: ; | |
2902 | } | |
2903 | ||
2904 | /* Finally, allocate space. */ | |
2905 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2906 | { | |
e7c33416 NC |
2907 | asection * sreloc; |
2908 | ||
cbe950e9 | 2909 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2910 | |
2911 | BFD_ASSERT (sreloc != NULL); | |
2912 | ||
351f65ca | 2913 | sreloc->size += p->count * bed->s->sizeof_rela; |
c434dee6 AJ |
2914 | } |
2915 | ||
b34976b6 | 2916 | return TRUE; |
c434dee6 AJ |
2917 | } |
2918 | ||
c25bc9fc L |
2919 | /* Allocate space in .plt, .got and associated reloc sections for |
2920 | local dynamic relocs. */ | |
2921 | ||
2922 | static bfd_boolean | |
351f65ca | 2923 | elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf) |
c25bc9fc L |
2924 | { |
2925 | struct elf_link_hash_entry *h | |
2926 | = (struct elf_link_hash_entry *) *slot; | |
2927 | ||
2928 | if (h->type != STT_GNU_IFUNC | |
2929 | || !h->def_regular | |
2930 | || !h->ref_regular | |
2931 | || !h->forced_local | |
2932 | || h->root.type != bfd_link_hash_defined) | |
2933 | abort (); | |
2934 | ||
351f65ca | 2935 | return elf_x86_64_allocate_dynrelocs (h, inf); |
c25bc9fc L |
2936 | } |
2937 | ||
c434dee6 AJ |
2938 | /* Find any dynamic relocs that apply to read-only sections. */ |
2939 | ||
b34976b6 | 2940 | static bfd_boolean |
351f65ca L |
2941 | elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h, |
2942 | void * inf) | |
c434dee6 | 2943 | { |
351f65ca | 2944 | struct elf_x86_64_link_hash_entry *eh; |
e03a8ed8 | 2945 | struct elf_dyn_relocs *p; |
c434dee6 | 2946 | |
aa715242 L |
2947 | /* Skip local IFUNC symbols. */ |
2948 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
2949 | return TRUE; | |
2950 | ||
351f65ca | 2951 | eh = (struct elf_x86_64_link_hash_entry *) h; |
c434dee6 AJ |
2952 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2953 | { | |
2954 | asection *s = p->sec->output_section; | |
2955 | ||
2956 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2957 | { | |
2958 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2959 | ||
2960 | info->flags |= DF_TEXTREL; | |
2961 | ||
0e1862bb | 2962 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd L |
2963 | || info->error_textrel) |
2964 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"), | |
b70321a2 L |
2965 | p->sec->owner, h->root.root.string, |
2966 | p->sec); | |
2967 | ||
c434dee6 | 2968 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 2969 | return FALSE; |
c434dee6 AJ |
2970 | } |
2971 | } | |
b34976b6 | 2972 | return TRUE; |
c434dee6 AJ |
2973 | } |
2974 | ||
56ceb5b5 | 2975 | /* With the local symbol, foo, we convert |
daa67607 L |
2976 | mov foo@GOTPCREL(%rip), %reg |
2977 | to | |
2978 | lea foo(%rip), %reg | |
56ceb5b5 L |
2979 | and convert |
2980 | call/jmp *foo@GOTPCREL(%rip) | |
2981 | to | |
2982 | nop call foo/jmp foo nop | |
2983 | When PIC is false, convert | |
2984 | test %reg, foo@GOTPCREL(%rip) | |
2985 | to | |
2986 | test $foo, %reg | |
2987 | and convert | |
2988 | binop foo@GOTPCREL(%rip), %reg | |
2989 | to | |
2990 | binop $foo, %reg | |
2991 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
2992 | instructions. */ | |
daa67607 L |
2993 | |
2994 | static bfd_boolean | |
56ceb5b5 L |
2995 | elf_x86_64_convert_load (bfd *abfd, asection *sec, |
2996 | struct bfd_link_info *link_info) | |
daa67607 L |
2997 | { |
2998 | Elf_Internal_Shdr *symtab_hdr; | |
2999 | Elf_Internal_Rela *internal_relocs; | |
3000 | Elf_Internal_Rela *irel, *irelend; | |
3001 | bfd_byte *contents; | |
3002 | struct elf_x86_64_link_hash_table *htab; | |
3003 | bfd_boolean changed_contents; | |
3004 | bfd_boolean changed_relocs; | |
3005 | bfd_signed_vma *local_got_refcounts; | |
59cab532 | 3006 | bfd_vma maxpagesize; |
daa67607 L |
3007 | |
3008 | /* Don't even try to convert non-ELF outputs. */ | |
3009 | if (!is_elf_hash_table (link_info->hash)) | |
3010 | return FALSE; | |
3011 | ||
c1d11331 | 3012 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 3013 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
56ceb5b5 | 3014 | || sec->need_convert_load == 0 |
c8831961 | 3015 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
3016 | return TRUE; |
3017 | ||
3018 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3019 | ||
3020 | /* Load the relocations for this section. */ | |
3021 | internal_relocs = (_bfd_elf_link_read_relocs | |
3022 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
3023 | link_info->keep_memory)); | |
3024 | if (internal_relocs == NULL) | |
3025 | return FALSE; | |
3026 | ||
3027 | htab = elf_x86_64_hash_table (link_info); | |
3028 | changed_contents = FALSE; | |
3029 | changed_relocs = FALSE; | |
3030 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
59cab532 | 3031 | maxpagesize = get_elf_backend_data (abfd)->maxpagesize; |
daa67607 L |
3032 | |
3033 | /* Get the section contents. */ | |
3034 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
3035 | contents = elf_section_data (sec)->this_hdr.contents; | |
3036 | else | |
3037 | { | |
3038 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
3039 | goto error_return; | |
3040 | } | |
3041 | ||
3042 | irelend = internal_relocs + sec->reloc_count; | |
3043 | for (irel = internal_relocs; irel < irelend; irel++) | |
3044 | { | |
3045 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
3046 | unsigned int r_symndx = htab->r_sym (irel->r_info); | |
3047 | unsigned int indx; | |
3048 | struct elf_link_hash_entry *h; | |
59cab532 L |
3049 | asection *tsec; |
3050 | char symtype; | |
3051 | bfd_vma toff, roff; | |
56ceb5b5 | 3052 | bfd_signed_vma raddend; |
dfc87947 | 3053 | unsigned int opcode; |
56ceb5b5 | 3054 | unsigned int modrm; |
daa67607 | 3055 | |
56ceb5b5 L |
3056 | if (r_type != R_X86_64_GOTPCREL |
3057 | && r_type != R_X86_64_GOTPCRELX | |
3058 | && r_type != R_X86_64_REX_GOTPCRELX) | |
daa67607 L |
3059 | continue; |
3060 | ||
59cab532 | 3061 | roff = irel->r_offset; |
56ceb5b5 L |
3062 | if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2)) |
3063 | continue; | |
59cab532 | 3064 | |
56ceb5b5 L |
3065 | raddend = irel->r_addend; |
3066 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
3067 | if (raddend != -4) | |
dfc87947 L |
3068 | continue; |
3069 | ||
3070 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
3071 | ||
56ceb5b5 | 3072 | /* It is OK to convert mov to lea. */ |
dfc87947 | 3073 | if (opcode != 0x8b) |
56ceb5b5 L |
3074 | { |
3075 | /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX | |
3076 | for mov call, jmp or one of adc, add, and, cmp, or, sbb, | |
3077 | sub, test, xor instructions. */ | |
3078 | if (r_type != R_X86_64_GOTPCRELX | |
3079 | && r_type != R_X86_64_REX_GOTPCRELX) | |
3080 | continue; | |
3081 | ||
3082 | /* It is OK to convert indirect branch to direct branch. */ | |
3083 | if (opcode != 0xff) | |
3084 | { | |
3085 | /* It is OK to convert adc, add, and, cmp, or, sbb, sub, | |
3086 | test, xor only when PIC is false. */ | |
3087 | if (bfd_link_pic (link_info)) | |
3088 | continue; | |
3089 | } | |
3090 | } | |
59cab532 | 3091 | |
daa67607 L |
3092 | /* Get the symbol referred to by the reloc. */ |
3093 | if (r_symndx < symtab_hdr->sh_info) | |
3094 | { | |
3095 | Elf_Internal_Sym *isym; | |
3096 | ||
3097 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
3098 | abfd, r_symndx); | |
3099 | ||
59cab532 L |
3100 | symtype = ELF_ST_TYPE (isym->st_info); |
3101 | ||
56ceb5b5 L |
3102 | /* STT_GNU_IFUNC must keep GOTPCREL relocations and skip |
3103 | relocation against undefined symbols. */ | |
77697d41 L |
3104 | if (symtype == STT_GNU_IFUNC || isym->st_shndx == SHN_UNDEF) |
3105 | continue; | |
59cab532 | 3106 | |
77697d41 L |
3107 | if (isym->st_shndx == SHN_ABS) |
3108 | tsec = bfd_abs_section_ptr; | |
3109 | else if (isym->st_shndx == SHN_COMMON) | |
3110 | tsec = bfd_com_section_ptr; | |
3111 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
3112 | tsec = &_bfd_elf_large_com_section; | |
3113 | else | |
3114 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
3115 | ||
3116 | h = NULL; | |
3117 | toff = isym->st_value; | |
59cab532 L |
3118 | } |
3119 | else | |
3120 | { | |
3121 | indx = r_symndx - symtab_hdr->sh_info; | |
3122 | h = elf_sym_hashes (abfd)[indx]; | |
3123 | BFD_ASSERT (h != NULL); | |
3124 | ||
3125 | while (h->root.type == bfd_link_hash_indirect | |
3126 | || h->root.type == bfd_link_hash_warning) | |
3127 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3128 | ||
56ceb5b5 L |
3129 | /* STT_GNU_IFUNC must keep GOTPCREL relocations. We also |
3130 | avoid optimizing GOTPCREL relocations againt _DYNAMIC | |
3131 | since ld.so may use its link-time address. */ | |
ead3d542 L |
3132 | if ((h->def_regular |
3133 | || h->root.type == bfd_link_hash_defined | |
3134 | || h->root.type == bfd_link_hash_defweak) | |
75a06c79 | 3135 | && h->type != STT_GNU_IFUNC |
59cab532 L |
3136 | && h != htab->elf.hdynamic |
3137 | && SYMBOL_REFERENCES_LOCAL (link_info, h)) | |
7b7e7f1d | 3138 | { |
ead3d542 L |
3139 | /* bfd_link_hash_new or bfd_link_hash_undefined is |
3140 | set by an assignment in a linker script in | |
3141 | bfd_elf_record_link_assignment. FIXME: If we | |
3142 | ever get a linker error due relocation overflow, | |
3143 | we will skip this optimization. */ | |
3144 | if (h->def_regular | |
3145 | && (h->root.type == bfd_link_hash_new | |
3146 | || h->root.type == bfd_link_hash_undefined)) | |
7b7e7f1d L |
3147 | goto convert; |
3148 | tsec = h->root.u.def.section; | |
3149 | toff = h->root.u.def.value; | |
3150 | symtype = h->type; | |
3151 | } | |
77697d41 L |
3152 | else |
3153 | continue; | |
59cab532 L |
3154 | } |
3155 | ||
59cab532 L |
3156 | if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE) |
3157 | { | |
3158 | /* At this stage in linking, no SEC_MERGE symbol has been | |
3159 | adjusted, so all references to such symbols need to be | |
3160 | passed through _bfd_merged_section_offset. (Later, in | |
3161 | relocate_section, all SEC_MERGE symbols *except* for | |
3162 | section symbols have been adjusted.) | |
3163 | ||
3164 | gas may reduce relocations against symbols in SEC_MERGE | |
3165 | sections to a relocation against the section symbol when | |
3166 | the original addend was zero. When the reloc is against | |
3167 | a section symbol we should include the addend in the | |
3168 | offset passed to _bfd_merged_section_offset, since the | |
3169 | location of interest is the original symbol. On the | |
3170 | other hand, an access to "sym+addend" where "sym" is not | |
3171 | a section symbol should not include the addend; Such an | |
3172 | access is presumed to be an offset from "sym"; The | |
3173 | location of interest is just "sym". */ | |
3174 | if (symtype == STT_SECTION) | |
56ceb5b5 | 3175 | toff += raddend; |
59cab532 L |
3176 | |
3177 | toff = _bfd_merged_section_offset (abfd, &tsec, | |
3178 | elf_section_data (tsec)->sec_info, | |
3179 | toff); | |
3180 | ||
3181 | if (symtype != STT_SECTION) | |
56ceb5b5 | 3182 | toff += raddend; |
59cab532 L |
3183 | } |
3184 | else | |
56ceb5b5 | 3185 | toff += raddend; |
59cab532 L |
3186 | |
3187 | /* Don't convert if R_X86_64_PC32 relocation overflows. */ | |
3188 | if (tsec->output_section == sec->output_section) | |
3189 | { | |
3190 | if ((toff - roff + 0x80000000) > 0xffffffff) | |
3191 | continue; | |
3192 | } | |
3193 | else | |
3194 | { | |
4a539596 | 3195 | bfd_signed_vma distance; |
59cab532 L |
3196 | |
3197 | /* At this point, we don't know the load addresses of TSEC | |
3198 | section nor SEC section. We estimate the distrance between | |
fb06f1c0 | 3199 | SEC and TSEC. We store the estimated distances in the |
4a539596 L |
3200 | compressed_size field of the output section, which is only |
3201 | used to decompress the compressed input section. */ | |
3202 | if (sec->output_section->compressed_size == 0) | |
59cab532 | 3203 | { |
4a539596 L |
3204 | asection *asect; |
3205 | bfd_size_type size = 0; | |
3206 | for (asect = link_info->output_bfd->sections; | |
3207 | asect != NULL; | |
3208 | asect = asect->next) | |
59cab532 | 3209 | { |
4a539596 L |
3210 | asection *i; |
3211 | for (i = asect->map_head.s; | |
3212 | i != NULL; | |
3213 | i = i->map_head.s) | |
3214 | { | |
3215 | size = align_power (size, i->alignment_power); | |
3216 | size += i->size; | |
3217 | } | |
3218 | asect->compressed_size = size; | |
59cab532 | 3219 | } |
daa67607 | 3220 | } |
59cab532 | 3221 | |
56ceb5b5 L |
3222 | /* Don't convert GOTPCREL relocations if TSEC isn't placed |
3223 | after SEC. */ | |
4a539596 L |
3224 | distance = (tsec->output_section->compressed_size |
3225 | - sec->output_section->compressed_size); | |
3226 | if (distance < 0) | |
59cab532 L |
3227 | continue; |
3228 | ||
3229 | /* Take PT_GNU_RELRO segment into account by adding | |
3230 | maxpagesize. */ | |
4a539596 | 3231 | if ((toff + distance + maxpagesize - roff + 0x80000000) |
59cab532 L |
3232 | > 0xffffffff) |
3233 | continue; | |
daa67607 L |
3234 | } |
3235 | ||
7b7e7f1d | 3236 | convert: |
56ceb5b5 L |
3237 | if (opcode == 0xff) |
3238 | { | |
3239 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
3240 | unsigned int nop; | |
caa65211 | 3241 | unsigned int disp; |
56ceb5b5 L |
3242 | bfd_vma nop_offset; |
3243 | ||
3244 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
3245 | R_X86_64_PC32. */ | |
3246 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
3247 | if (modrm == 0x25) | |
3248 | { | |
56ceb5b5 L |
3249 | /* Convert to "jmp foo nop". */ |
3250 | modrm = 0xe9; | |
3251 | nop = NOP_OPCODE; | |
3252 | nop_offset = irel->r_offset + 3; | |
3253 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
3254 | irel->r_offset -= 1; | |
3255 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
3256 | } | |
3257 | else | |
3258 | { | |
3259 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE | |
3260 | is a nop prefix. */ | |
3261 | modrm = 0xe8; | |
caa65211 L |
3262 | nop = link_info->call_nop_byte; |
3263 | if (link_info->call_nop_as_suffix) | |
3264 | { | |
3265 | nop_offset = irel->r_offset + 3; | |
3266 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
3267 | irel->r_offset -= 1; | |
3268 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
3269 | } | |
3270 | else | |
3271 | nop_offset = irel->r_offset - 2; | |
56ceb5b5 L |
3272 | } |
3273 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
3274 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
3275 | r_type = R_X86_64_PC32; | |
3276 | } | |
3277 | else | |
3278 | { | |
3279 | if (opcode == 0x8b) | |
3280 | { | |
3281 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
3282 | "lea foo(%rip), %reg". */ | |
3283 | opcode = 0x8d; | |
3284 | r_type = R_X86_64_PC32; | |
3285 | } | |
3286 | else | |
3287 | { | |
3288 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
3289 | if (opcode == 0x85) | |
3290 | { | |
3291 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
3292 | "test $foo, %reg". */ | |
3293 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
3294 | opcode = 0xf7; | |
3295 | } | |
3296 | else | |
3297 | { | |
3298 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
3299 | "binop $foo, %reg". */ | |
3300 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
3301 | opcode = 0x81; | |
3302 | } | |
3303 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
3304 | ||
3305 | if (r_type == R_X86_64_REX_GOTPCRELX) | |
3306 | { | |
3307 | /* Move the R bit to the B bit in REX byte. */ | |
3308 | unsigned int rex = bfd_get_8 (abfd, contents + roff - 3); | |
3309 | rex = (rex & ~REX_R) | (rex & REX_R) >> 2; | |
3310 | bfd_put_8 (abfd, rex, contents + roff - 3); | |
3311 | } | |
3312 | /* No addend for R_X86_64_32S relocation. */ | |
3313 | irel->r_addend = 0; | |
3314 | r_type = R_X86_64_32S; | |
3315 | } | |
3316 | ||
3317 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
3318 | } | |
3319 | ||
3320 | irel->r_info = htab->r_info (r_symndx, r_type); | |
59cab532 L |
3321 | changed_contents = TRUE; |
3322 | changed_relocs = TRUE; | |
3323 | ||
77697d41 | 3324 | if (h) |
59cab532 | 3325 | { |
77697d41 L |
3326 | if (h->got.refcount > 0) |
3327 | h->got.refcount -= 1; | |
59cab532 L |
3328 | } |
3329 | else | |
daa67607 | 3330 | { |
77697d41 L |
3331 | if (local_got_refcounts != NULL |
3332 | && local_got_refcounts[r_symndx] > 0) | |
3333 | local_got_refcounts[r_symndx] -= 1; | |
daa67607 L |
3334 | } |
3335 | } | |
3336 | ||
3337 | if (contents != NULL | |
3338 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3339 | { | |
3340 | if (!changed_contents && !link_info->keep_memory) | |
3341 | free (contents); | |
3342 | else | |
3343 | { | |
3344 | /* Cache the section contents for elf_link_input_bfd. */ | |
3345 | elf_section_data (sec)->this_hdr.contents = contents; | |
3346 | } | |
3347 | } | |
3348 | ||
3349 | if (elf_section_data (sec)->relocs != internal_relocs) | |
3350 | { | |
3351 | if (!changed_relocs) | |
3352 | free (internal_relocs); | |
3353 | else | |
3354 | elf_section_data (sec)->relocs = internal_relocs; | |
3355 | } | |
3356 | ||
3357 | return TRUE; | |
3358 | ||
3359 | error_return: | |
3360 | if (contents != NULL | |
3361 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3362 | free (contents); | |
3363 | if (internal_relocs != NULL | |
3364 | && elf_section_data (sec)->relocs != internal_relocs) | |
3365 | free (internal_relocs); | |
3366 | return FALSE; | |
3367 | } | |
3368 | ||
70256ad8 AJ |
3369 | /* Set the sizes of the dynamic sections. */ |
3370 | ||
b34976b6 | 3371 | static bfd_boolean |
351f65ca L |
3372 | elf_x86_64_size_dynamic_sections (bfd *output_bfd, |
3373 | struct bfd_link_info *info) | |
70256ad8 | 3374 | { |
351f65ca | 3375 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
3376 | bfd *dynobj; |
3377 | asection *s; | |
b34976b6 | 3378 | bfd_boolean relocs; |
c434dee6 | 3379 | bfd *ibfd; |
351f65ca | 3380 | const struct elf_backend_data *bed; |
70256ad8 | 3381 | |
351f65ca | 3382 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3383 | if (htab == NULL) |
3384 | return FALSE; | |
351f65ca | 3385 | bed = get_elf_backend_data (output_bfd); |
4dfe6ac6 | 3386 | |
c434dee6 AJ |
3387 | dynobj = htab->elf.dynobj; |
3388 | if (dynobj == NULL) | |
3389 | abort (); | |
70256ad8 | 3390 | |
c434dee6 | 3391 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
3392 | { |
3393 | /* Set the contents of the .interp section to the interpreter. */ | |
9b8b325a | 3394 | if (bfd_link_executable (info) && !info->nointerp) |
70256ad8 | 3395 | { |
3d4d4302 | 3396 | s = bfd_get_linker_section (dynobj, ".interp"); |
c434dee6 AJ |
3397 | if (s == NULL) |
3398 | abort (); | |
351f65ca L |
3399 | s->size = htab->dynamic_interpreter_size; |
3400 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
70256ad8 AJ |
3401 | } |
3402 | } | |
70256ad8 | 3403 | |
c434dee6 AJ |
3404 | /* Set up .got offsets for local syms, and space for local dynamic |
3405 | relocs. */ | |
c72f2fb2 | 3406 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
70256ad8 | 3407 | { |
c434dee6 AJ |
3408 | bfd_signed_vma *local_got; |
3409 | bfd_signed_vma *end_local_got; | |
bffbf940 | 3410 | char *local_tls_type; |
67a4f2b7 | 3411 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
3412 | bfd_size_type locsymcount; |
3413 | Elf_Internal_Shdr *symtab_hdr; | |
3414 | asection *srel; | |
70256ad8 | 3415 | |
0ffa91dd | 3416 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
3417 | continue; |
3418 | ||
c434dee6 | 3419 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 3420 | { |
e03a8ed8 | 3421 | struct elf_dyn_relocs *p; |
c434dee6 | 3422 | |
56ceb5b5 | 3423 | if (!elf_x86_64_convert_load (ibfd, s, info)) |
daa67607 L |
3424 | return FALSE; |
3425 | ||
e03a8ed8 | 3426 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 3427 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
3428 | p != NULL; |
3429 | p = p->next) | |
70256ad8 | 3430 | { |
c434dee6 AJ |
3431 | if (!bfd_is_abs_section (p->sec) |
3432 | && bfd_is_abs_section (p->sec->output_section)) | |
3433 | { | |
3434 | /* Input section has been discarded, either because | |
3435 | it is a copy of a linkonce section or due to | |
3436 | linker script /DISCARD/, so we'll be discarding | |
3437 | the relocs too. */ | |
3438 | } | |
3439 | else if (p->count != 0) | |
3440 | { | |
3441 | srel = elf_section_data (p->sec)->sreloc; | |
351f65ca | 3442 | srel->size += p->count * bed->s->sizeof_rela; |
4b819e1f L |
3443 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
3444 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
3445 | { |
3446 | info->flags |= DF_TEXTREL; | |
0e1862bb | 3447 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd L |
3448 | || info->error_textrel) |
3449 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), | |
b70321a2 | 3450 | p->sec->owner, p->sec); |
b70321a2 | 3451 | } |
c434dee6 | 3452 | } |
70256ad8 AJ |
3453 | } |
3454 | } | |
c434dee6 AJ |
3455 | |
3456 | local_got = elf_local_got_refcounts (ibfd); | |
3457 | if (!local_got) | |
3458 | continue; | |
3459 | ||
0ffa91dd | 3460 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
3461 | locsymcount = symtab_hdr->sh_info; |
3462 | end_local_got = local_got + locsymcount; | |
351f65ca L |
3463 | local_tls_type = elf_x86_64_local_got_tls_type (ibfd); |
3464 | local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd); | |
6de2ae4a L |
3465 | s = htab->elf.sgot; |
3466 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
3467 | for (; local_got < end_local_got; |
3468 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 3469 | { |
67a4f2b7 | 3470 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 3471 | if (*local_got > 0) |
70256ad8 | 3472 | { |
67a4f2b7 AO |
3473 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
3474 | { | |
6de2ae4a | 3475 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
351f65ca | 3476 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 3477 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
3478 | *local_got = (bfd_vma) -2; |
3479 | } | |
3480 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3481 | || GOT_TLS_GD_P (*local_tls_type)) | |
3482 | { | |
3483 | *local_got = s->size; | |
3484 | s->size += GOT_ENTRY_SIZE; | |
3485 | if (GOT_TLS_GD_P (*local_tls_type)) | |
3486 | s->size += GOT_ENTRY_SIZE; | |
3487 | } | |
0e1862bb | 3488 | if (bfd_link_pic (info) |
67a4f2b7 | 3489 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 3490 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
3491 | { |
3492 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
3493 | { | |
6de2ae4a | 3494 | htab->elf.srelplt->size |
351f65ca | 3495 | += bed->s->sizeof_rela; |
67a4f2b7 AO |
3496 | htab->tlsdesc_plt = (bfd_vma) -1; |
3497 | } | |
3498 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3499 | || GOT_TLS_GD_P (*local_tls_type)) | |
351f65ca | 3500 | srel->size += bed->s->sizeof_rela; |
67a4f2b7 | 3501 | } |
70256ad8 AJ |
3502 | } |
3503 | else | |
c434dee6 AJ |
3504 | *local_got = (bfd_vma) -1; |
3505 | } | |
3506 | } | |
70256ad8 | 3507 | |
bffbf940 JJ |
3508 | if (htab->tls_ld_got.refcount > 0) |
3509 | { | |
3510 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
3511 | relocs. */ | |
6de2ae4a L |
3512 | htab->tls_ld_got.offset = htab->elf.sgot->size; |
3513 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; | |
351f65ca | 3514 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
bffbf940 JJ |
3515 | } |
3516 | else | |
3517 | htab->tls_ld_got.offset = -1; | |
3518 | ||
c434dee6 AJ |
3519 | /* Allocate global sym .plt and .got entries, and space for global |
3520 | sym dynamic relocs. */ | |
351f65ca | 3521 | elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs, |
eb4ff4d6 | 3522 | info); |
c434dee6 | 3523 | |
c25bc9fc L |
3524 | /* Allocate .plt and .got entries, and space for local symbols. */ |
3525 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 3526 | elf_x86_64_allocate_local_dynrelocs, |
c25bc9fc L |
3527 | info); |
3528 | ||
67a4f2b7 AO |
3529 | /* For every jump slot reserved in the sgotplt, reloc_count is |
3530 | incremented. However, when we reserve space for TLS descriptors, | |
3531 | it's not incremented, so in order to compute the space reserved | |
3532 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 L |
3533 | slot size. |
3534 | ||
3535 | PR ld/13302: We start next_irelative_index at the end of .rela.plt | |
3536 | so that R_X86_64_IRELATIVE entries come last. */ | |
6de2ae4a | 3537 | if (htab->elf.srelplt) |
e1f98742 L |
3538 | { |
3539 | htab->sgotplt_jump_table_size | |
3540 | = elf_x86_64_compute_jump_table_size (htab); | |
3541 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
3542 | } | |
3543 | else if (htab->elf.irelplt) | |
3544 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
67a4f2b7 AO |
3545 | |
3546 | if (htab->tlsdesc_plt) | |
3547 | { | |
3548 | /* If we're not using lazy TLS relocations, don't generate the | |
3549 | PLT and GOT entries they require. */ | |
3550 | if ((info->flags & DF_BIND_NOW)) | |
3551 | htab->tlsdesc_plt = 0; | |
3552 | else | |
3553 | { | |
6de2ae4a L |
3554 | htab->tlsdesc_got = htab->elf.sgot->size; |
3555 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
3556 | /* Reserve room for the initial entry. |
3557 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a | 3558 | if (htab->elf.splt->size == 0) |
eed180f8 | 3559 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
6de2ae4a | 3560 | htab->tlsdesc_plt = htab->elf.splt->size; |
eed180f8 | 3561 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
67a4f2b7 AO |
3562 | } |
3563 | } | |
3564 | ||
a7b16ceb L |
3565 | if (htab->elf.sgotplt) |
3566 | { | |
3567 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
eed180f8 | 3568 | entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
3569 | if ((htab->elf.hgot == NULL |
3570 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
3571 | && (htab->elf.sgotplt->size |
3572 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
3573 | && (htab->elf.splt == NULL |
3574 | || htab->elf.splt->size == 0) | |
3575 | && (htab->elf.sgot == NULL | |
3576 | || htab->elf.sgot->size == 0) | |
3577 | && (htab->elf.iplt == NULL | |
3578 | || htab->elf.iplt->size == 0) | |
3579 | && (htab->elf.igotplt == NULL | |
3580 | || htab->elf.igotplt->size == 0)) | |
3581 | htab->elf.sgotplt->size = 0; | |
3582 | } | |
3583 | ||
9a2a56cc AM |
3584 | if (htab->plt_eh_frame != NULL |
3585 | && htab->elf.splt != NULL | |
3586 | && htab->elf.splt->size != 0 | |
3587 | && !bfd_is_abs_section (htab->elf.splt->output_section) | |
3588 | && _bfd_elf_eh_frame_present (info)) | |
3589 | { | |
3590 | const struct elf_x86_64_backend_data *arch_data | |
f8222080 | 3591 | = get_elf_x86_64_arch_data (bed); |
9a2a56cc AM |
3592 | htab->plt_eh_frame->size = arch_data->eh_frame_plt_size; |
3593 | } | |
3594 | ||
c434dee6 AJ |
3595 | /* We now have determined the sizes of the various dynamic sections. |
3596 | Allocate memory for them. */ | |
b34976b6 | 3597 | relocs = FALSE; |
c434dee6 AJ |
3598 | for (s = dynobj->sections; s != NULL; s = s->next) |
3599 | { | |
3600 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3601 | continue; | |
3602 | ||
6de2ae4a L |
3603 | if (s == htab->elf.splt |
3604 | || s == htab->elf.sgot | |
3605 | || s == htab->elf.sgotplt | |
3606 | || s == htab->elf.iplt | |
3607 | || s == htab->elf.igotplt | |
0ff2b86e | 3608 | || s == htab->plt_bnd |
dd7e64d4 | 3609 | || s == htab->plt_got |
9a2a56cc | 3610 | || s == htab->plt_eh_frame |
75ff4589 | 3611 | || s == htab->sdynbss) |
c434dee6 AJ |
3612 | { |
3613 | /* Strip this section if we don't need it; see the | |
3614 | comment below. */ | |
3615 | } | |
0112cd26 | 3616 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 3617 | { |
6de2ae4a | 3618 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 3619 | relocs = TRUE; |
c434dee6 AJ |
3620 | |
3621 | /* We use the reloc_count field as a counter if we need | |
3622 | to copy relocs into the output file. */ | |
6de2ae4a | 3623 | if (s != htab->elf.srelplt) |
67a4f2b7 | 3624 | s->reloc_count = 0; |
70256ad8 | 3625 | } |
c434dee6 | 3626 | else |
70256ad8 AJ |
3627 | { |
3628 | /* It's not one of our sections, so don't allocate space. */ | |
3629 | continue; | |
3630 | } | |
3631 | ||
eea6121a | 3632 | if (s->size == 0) |
70256ad8 | 3633 | { |
c434dee6 AJ |
3634 | /* If we don't need this section, strip it from the |
3635 | output file. This is mostly to handle .rela.bss and | |
3636 | .rela.plt. We must create both sections in | |
3637 | create_dynamic_sections, because they must be created | |
3638 | before the linker maps input sections to output | |
3639 | sections. The linker does that before | |
3640 | adjust_dynamic_symbol is called, and it is that | |
3641 | function which decides whether anything needs to go | |
3642 | into these sections. */ | |
3643 | ||
8423293d | 3644 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
3645 | continue; |
3646 | } | |
3647 | ||
c456f082 AM |
3648 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3649 | continue; | |
3650 | ||
70256ad8 AJ |
3651 | /* Allocate memory for the section contents. We use bfd_zalloc |
3652 | here in case unused entries are not reclaimed before the | |
3653 | section's contents are written out. This should not happen, | |
3654 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
3655 | of garbage. */ | |
eea6121a | 3656 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 3657 | if (s->contents == NULL) |
b34976b6 | 3658 | return FALSE; |
70256ad8 AJ |
3659 | } |
3660 | ||
e41b3a13 | 3661 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3662 | && htab->plt_eh_frame->contents != NULL) |
3663 | { | |
3664 | const struct elf_x86_64_backend_data *arch_data | |
f8222080 | 3665 | = get_elf_x86_64_arch_data (bed); |
9a2a56cc AM |
3666 | |
3667 | memcpy (htab->plt_eh_frame->contents, | |
3668 | arch_data->eh_frame_plt, htab->plt_eh_frame->size); | |
3669 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
3670 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
3671 | } | |
e41b3a13 | 3672 | |
c434dee6 | 3673 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
3674 | { |
3675 | /* Add some entries to the .dynamic section. We fill in the | |
351f65ca | 3676 | values later, in elf_x86_64_finish_dynamic_sections, but we |
70256ad8 | 3677 | must add the entries now so that we get the correct size for |
407443a3 | 3678 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 3679 | dynamic linker and used by the debugger. */ |
dc810e39 | 3680 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3681 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3682 | |
0e1862bb | 3683 | if (bfd_link_executable (info)) |
70256ad8 | 3684 | { |
dc810e39 | 3685 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3686 | return FALSE; |
70256ad8 AJ |
3687 | } |
3688 | ||
6de2ae4a | 3689 | if (htab->elf.splt->size != 0) |
70256ad8 | 3690 | { |
7c1e8d3e L |
3691 | /* DT_PLTGOT is used by prelink even if there is no PLT |
3692 | relocation. */ | |
3693 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
b34976b6 | 3694 | return FALSE; |
67a4f2b7 | 3695 | |
7c1e8d3e L |
3696 | if (htab->elf.srelplt->size != 0) |
3697 | { | |
3698 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
3699 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
3700 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
3701 | return FALSE; | |
3702 | } | |
3703 | ||
67a4f2b7 AO |
3704 | if (htab->tlsdesc_plt |
3705 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
3706 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
3707 | return FALSE; | |
70256ad8 AJ |
3708 | } |
3709 | ||
3710 | if (relocs) | |
3711 | { | |
dc810e39 AM |
3712 | if (!add_dynamic_entry (DT_RELA, 0) |
3713 | || !add_dynamic_entry (DT_RELASZ, 0) | |
351f65ca | 3714 | || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela)) |
b34976b6 | 3715 | return FALSE; |
70256ad8 | 3716 | |
c434dee6 AJ |
3717 | /* If any dynamic relocs apply to a read-only section, |
3718 | then we need a DT_TEXTREL entry. */ | |
3719 | if ((info->flags & DF_TEXTREL) == 0) | |
eed180f8 | 3720 | elf_link_hash_traverse (&htab->elf, |
351f65ca | 3721 | elf_x86_64_readonly_dynrelocs, |
eb4ff4d6 | 3722 | info); |
c434dee6 AJ |
3723 | |
3724 | if ((info->flags & DF_TEXTREL) != 0) | |
3725 | { | |
8efa2874 L |
3726 | if ((elf_tdata (output_bfd)->has_gnu_symbols |
3727 | & elf_gnu_symbol_ifunc) == elf_gnu_symbol_ifunc) | |
3728 | { | |
3729 | info->callbacks->einfo | |
3730 | (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n")); | |
3731 | bfd_set_error (bfd_error_bad_value); | |
3732 | return FALSE; | |
3733 | } | |
3734 | ||
c434dee6 | 3735 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 3736 | return FALSE; |
c434dee6 | 3737 | } |
70256ad8 AJ |
3738 | } |
3739 | } | |
dc810e39 | 3740 | #undef add_dynamic_entry |
70256ad8 | 3741 | |
b34976b6 | 3742 | return TRUE; |
70256ad8 AJ |
3743 | } |
3744 | ||
67a4f2b7 | 3745 | static bfd_boolean |
351f65ca L |
3746 | elf_x86_64_always_size_sections (bfd *output_bfd, |
3747 | struct bfd_link_info *info) | |
67a4f2b7 AO |
3748 | { |
3749 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3750 | ||
3751 | if (tls_sec) | |
3752 | { | |
3753 | struct elf_link_hash_entry *tlsbase; | |
3754 | ||
3755 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3756 | "_TLS_MODULE_BASE_", | |
3757 | FALSE, FALSE, FALSE); | |
3758 | ||
3759 | if (tlsbase && tlsbase->type == STT_TLS) | |
3760 | { | |
351f65ca | 3761 | struct elf_x86_64_link_hash_table *htab; |
67a4f2b7 AO |
3762 | struct bfd_link_hash_entry *bh = NULL; |
3763 | const struct elf_backend_data *bed | |
3764 | = get_elf_backend_data (output_bfd); | |
3765 | ||
351f65ca | 3766 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3767 | if (htab == NULL) |
3768 | return FALSE; | |
3769 | ||
67a4f2b7 AO |
3770 | if (!(_bfd_generic_link_add_one_symbol |
3771 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3772 | tls_sec, 0, NULL, FALSE, | |
3773 | bed->collect, &bh))) | |
3774 | return FALSE; | |
9f03412a | 3775 | |
4dfe6ac6 | 3776 | htab->tls_module_base = bh; |
9f03412a | 3777 | |
67a4f2b7 AO |
3778 | tlsbase = (struct elf_link_hash_entry *)bh; |
3779 | tlsbase->def_regular = 1; | |
3780 | tlsbase->other = STV_HIDDEN; | |
576fa883 | 3781 | tlsbase->root.linker_def = 1; |
67a4f2b7 AO |
3782 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
3783 | } | |
3784 | } | |
3785 | ||
3786 | return TRUE; | |
3787 | } | |
3788 | ||
9f03412a AO |
3789 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
3790 | executables. Rather than setting it to the beginning of the TLS | |
3791 | section, we have to set it to the end. This function may be called | |
3792 | multiple times, it is idempotent. */ | |
3793 | ||
3794 | static void | |
351f65ca | 3795 | elf_x86_64_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 3796 | { |
351f65ca | 3797 | struct elf_x86_64_link_hash_table *htab; |
9f03412a AO |
3798 | struct bfd_link_hash_entry *base; |
3799 | ||
0e1862bb | 3800 | if (!bfd_link_executable (info)) |
9f03412a AO |
3801 | return; |
3802 | ||
351f65ca | 3803 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3804 | if (htab == NULL) |
3805 | return; | |
9f03412a | 3806 | |
4dfe6ac6 NC |
3807 | base = htab->tls_module_base; |
3808 | if (base == NULL) | |
9f03412a AO |
3809 | return; |
3810 | ||
4dfe6ac6 | 3811 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
3812 | } |
3813 | ||
bffbf940 JJ |
3814 | /* Return the base VMA address which should be subtracted from real addresses |
3815 | when resolving @dtpoff relocation. | |
3816 | This is PT_TLS segment p_vaddr. */ | |
3817 | ||
3818 | static bfd_vma | |
351f65ca | 3819 | elf_x86_64_dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 3820 | { |
e1918d23 AM |
3821 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3822 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 3823 | return 0; |
e1918d23 | 3824 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
3825 | } |
3826 | ||
3827 | /* Return the relocation value for @tpoff relocation | |
3828 | if STT_TLS virtual address is ADDRESS. */ | |
3829 | ||
3830 | static bfd_vma | |
351f65ca | 3831 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 3832 | { |
e1918d23 | 3833 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3834 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3835 | bfd_vma static_tls_size; | |
bffbf940 JJ |
3836 | |
3837 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 3838 | if (htab->tls_sec == NULL) |
bffbf940 | 3839 | return 0; |
7dc98aea RO |
3840 | |
3841 | /* Consider special static TLS alignment requirements. */ | |
3842 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3843 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
3844 | } |
3845 | ||
90f487df L |
3846 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
3847 | branch? */ | |
3848 | ||
3849 | static bfd_boolean | |
3850 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
3851 | { | |
3852 | /* Opcode Instruction | |
3853 | 0xe8 call | |
3854 | 0xe9 jump | |
3855 | 0x0f 0x8x conditional jump */ | |
3856 | return ((offset > 0 | |
3857 | && (contents [offset - 1] == 0xe8 | |
3858 | || contents [offset - 1] == 0xe9)) | |
3859 | || (offset > 1 | |
3860 | && contents [offset - 2] == 0x0f | |
3861 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
3862 | } | |
3863 | ||
8d88c4ca NC |
3864 | /* Relocate an x86_64 ELF section. */ |
3865 | ||
b34976b6 | 3866 | static bfd_boolean |
351f65ca L |
3867 | elf_x86_64_relocate_section (bfd *output_bfd, |
3868 | struct bfd_link_info *info, | |
3869 | bfd *input_bfd, | |
3870 | asection *input_section, | |
3871 | bfd_byte *contents, | |
3872 | Elf_Internal_Rela *relocs, | |
3873 | Elf_Internal_Sym *local_syms, | |
3874 | asection **local_sections) | |
8d88c4ca | 3875 | { |
351f65ca | 3876 | struct elf_x86_64_link_hash_table *htab; |
8d88c4ca NC |
3877 | Elf_Internal_Shdr *symtab_hdr; |
3878 | struct elf_link_hash_entry **sym_hashes; | |
3879 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3880 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 3881 | Elf_Internal_Rela *rel; |
60f2e42e | 3882 | Elf_Internal_Rela *wrel; |
8d88c4ca | 3883 | Elf_Internal_Rela *relend; |
eed180f8 | 3884 | const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
8d88c4ca | 3885 | |
0ffa91dd NC |
3886 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
3887 | ||
351f65ca | 3888 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3889 | if (htab == NULL) |
3890 | return FALSE; | |
0ffa91dd | 3891 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
3892 | sym_hashes = elf_sym_hashes (input_bfd); |
3893 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
351f65ca | 3894 | local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 3895 | |
351f65ca | 3896 | elf_x86_64_set_tls_module_base (info); |
9f03412a | 3897 | |
60f2e42e | 3898 | rel = wrel = relocs; |
8d88c4ca | 3899 | relend = relocs + input_section->reloc_count; |
60f2e42e | 3900 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 3901 | { |
bffbf940 | 3902 | unsigned int r_type; |
8d88c4ca NC |
3903 | reloc_howto_type *howto; |
3904 | unsigned long r_symndx; | |
3905 | struct elf_link_hash_entry *h; | |
0ff2b86e | 3906 | struct elf_x86_64_link_hash_entry *eh; |
8d88c4ca NC |
3907 | Elf_Internal_Sym *sym; |
3908 | asection *sec; | |
0ff2b86e | 3909 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 3910 | bfd_vma relocation; |
b34976b6 | 3911 | bfd_boolean unresolved_reloc; |
8d88c4ca | 3912 | bfd_reloc_status_type r; |
bffbf940 | 3913 | int tls_type; |
0ff2b86e | 3914 | asection *base_got, *resolved_plt; |
1788fc08 | 3915 | bfd_vma st_size; |
8d88c4ca | 3916 | |
351f65ca | 3917 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
3918 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
3919 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
3920 | { |
3921 | if (wrel != rel) | |
3922 | *wrel = *rel; | |
3923 | continue; | |
3924 | } | |
8d88c4ca | 3925 | |
9911c0fc | 3926 | if (r_type >= (int) R_X86_64_standard) |
8da6118f | 3927 | { |
9911c0fc L |
3928 | (*_bfd_error_handler) |
3929 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), | |
3930 | input_bfd, input_section, r_type); | |
8da6118f | 3931 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 3932 | return FALSE; |
8da6118f | 3933 | } |
8d88c4ca | 3934 | |
d7921315 | 3935 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 3936 | || ABI_64_P (output_bfd)) |
d7921315 L |
3937 | howto = x86_64_elf_howto_table + r_type; |
3938 | else | |
3939 | howto = (x86_64_elf_howto_table | |
3940 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 3941 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
3942 | h = NULL; |
3943 | sym = NULL; | |
3944 | sec = NULL; | |
b34976b6 | 3945 | unresolved_reloc = FALSE; |
8d88c4ca | 3946 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
3947 | { |
3948 | sym = local_syms + r_symndx; | |
3949 | sec = local_sections[r_symndx]; | |
c434dee6 | 3950 | |
c25bc9fc L |
3951 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
3952 | &sec, rel); | |
1788fc08 | 3953 | st_size = sym->st_size; |
c25bc9fc L |
3954 | |
3955 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 3956 | if (!bfd_link_relocatable (info) |
351f65ca | 3957 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 3958 | { |
351f65ca L |
3959 | h = elf_x86_64_get_local_sym_hash (htab, input_bfd, |
3960 | rel, FALSE); | |
c25bc9fc L |
3961 | if (h == NULL) |
3962 | abort (); | |
3963 | ||
eed180f8 | 3964 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
3965 | h->root.u.def.value = sym->st_value; |
3966 | h->root.u.def.section = sec; | |
3967 | } | |
8da6118f | 3968 | } |
8d88c4ca | 3969 | else |
8da6118f | 3970 | { |
c9736ba0 | 3971 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 3972 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
c434dee6 | 3973 | |
b2a8e766 AM |
3974 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3975 | r_symndx, symtab_hdr, sym_hashes, | |
3976 | h, sec, relocation, | |
62d887d4 | 3977 | unresolved_reloc, warned, ignored); |
1788fc08 | 3978 | st_size = h->size; |
8da6118f | 3979 | } |
ab96bf03 | 3980 | |
dbaa2011 | 3981 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
3982 | { |
3983 | _bfd_clear_contents (howto, input_bfd, input_section, | |
3984 | contents + rel->r_offset); | |
3985 | wrel->r_offset = rel->r_offset; | |
3986 | wrel->r_info = 0; | |
3987 | wrel->r_addend = 0; | |
3988 | ||
3989 | /* For ld -r, remove relocations in debug sections against | |
3990 | sections defined in discarded sections. Not done for | |
3991 | eh_frame editing code expects to be present. */ | |
3992 | if (bfd_link_relocatable (info) | |
3993 | && (input_section->flags & SEC_DEBUGGING)) | |
3994 | wrel--; | |
3995 | ||
3996 | continue; | |
3997 | } | |
ab96bf03 | 3998 | |
0e1862bb | 3999 | if (bfd_link_relocatable (info)) |
2d5da473 L |
4000 | { |
4001 | if (wrel != rel) | |
4002 | *wrel = *rel; | |
4003 | continue; | |
4004 | } | |
ab96bf03 | 4005 | |
1788fc08 | 4006 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 4007 | { |
1788fc08 L |
4008 | if (r_type == R_X86_64_64) |
4009 | { | |
4010 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
4011 | zero-extend it to 64bit if addend is zero. */ | |
4012 | r_type = R_X86_64_32; | |
4013 | memset (contents + rel->r_offset + 4, 0, 4); | |
4014 | } | |
4015 | else if (r_type == R_X86_64_SIZE64) | |
4016 | { | |
4017 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
4018 | zero-extend it to 64bit if addend is zero. */ | |
4019 | r_type = R_X86_64_SIZE32; | |
4020 | memset (contents + rel->r_offset + 4, 0, 4); | |
4021 | } | |
64d25c44 L |
4022 | } |
4023 | ||
0ff2b86e L |
4024 | eh = (struct elf_x86_64_link_hash_entry *) h; |
4025 | ||
cbe950e9 L |
4026 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
4027 | it here if it is defined in a non-shared object. */ | |
4028 | if (h != NULL | |
4029 | && h->type == STT_GNU_IFUNC | |
4030 | && h->def_regular) | |
4031 | { | |
cbe950e9 | 4032 | bfd_vma plt_index; |
4c544807 | 4033 | const char *name; |
cbe950e9 | 4034 | |
97dc35c8 L |
4035 | if ((input_section->flags & SEC_ALLOC) == 0) |
4036 | { | |
4037 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
4038 | sections because such sections are not SEC_ALLOC and | |
4039 | thus ld.so will not process them. */ | |
4040 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 4041 | continue; |
97dc35c8 L |
4042 | abort (); |
4043 | } | |
4044 | else if (h->plt.offset == (bfd_vma) -1) | |
cbe950e9 L |
4045 | abort (); |
4046 | ||
4047 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
4048 | if (htab->elf.splt != NULL) |
4049 | { | |
4050 | if (htab->plt_bnd != NULL) | |
4051 | { | |
4052 | resolved_plt = htab->plt_bnd; | |
4053 | plt_offset = eh->plt_bnd.offset; | |
4054 | } | |
4055 | else | |
4056 | { | |
4057 | resolved_plt = htab->elf.splt; | |
4058 | plt_offset = h->plt.offset; | |
4059 | } | |
4060 | } | |
4061 | else | |
4062 | { | |
4063 | resolved_plt = htab->elf.iplt; | |
4064 | plt_offset = h->plt.offset; | |
4065 | } | |
4066 | ||
4067 | relocation = (resolved_plt->output_section->vma | |
4068 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
4069 | |
4070 | switch (r_type) | |
4071 | { | |
4072 | default: | |
4c544807 L |
4073 | if (h->root.root.string) |
4074 | name = h->root.root.string; | |
4075 | else | |
4076 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
4077 | NULL); | |
cbe950e9 L |
4078 | (*_bfd_error_handler) |
4079 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
4080 | "symbol `%s' isn't handled by %s"), input_bfd, | |
4081 | x86_64_elf_howto_table[r_type].name, | |
4c544807 | 4082 | name, __FUNCTION__); |
cbe950e9 L |
4083 | bfd_set_error (bfd_error_bad_value); |
4084 | return FALSE; | |
4085 | ||
4086 | case R_X86_64_32S: | |
0e1862bb | 4087 | if (bfd_link_pic (info)) |
cbe950e9 | 4088 | abort (); |
710ab287 L |
4089 | goto do_relocation; |
4090 | ||
248775ba L |
4091 | case R_X86_64_32: |
4092 | if (ABI_64_P (output_bfd)) | |
4093 | goto do_relocation; | |
17672001 | 4094 | /* FALLTHROUGH */ |
eed180f8 | 4095 | case R_X86_64_64: |
710ab287 L |
4096 | if (rel->r_addend != 0) |
4097 | { | |
4c544807 L |
4098 | if (h->root.root.string) |
4099 | name = h->root.root.string; | |
4100 | else | |
4101 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
4102 | sym, NULL); | |
710ab287 L |
4103 | (*_bfd_error_handler) |
4104 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
4105 | "symbol `%s' has non-zero addend: %d"), | |
4106 | input_bfd, x86_64_elf_howto_table[r_type].name, | |
4c544807 | 4107 | name, rel->r_addend); |
710ab287 L |
4108 | bfd_set_error (bfd_error_bad_value); |
4109 | return FALSE; | |
4110 | } | |
4111 | ||
4112 | /* Generate dynamic relcoation only when there is a | |
c293fa49 | 4113 | non-GOT reference in a shared object. */ |
0e1862bb | 4114 | if (bfd_link_pic (info) && h->non_got_ref) |
710ab287 L |
4115 | { |
4116 | Elf_Internal_Rela outrel; | |
710ab287 L |
4117 | asection *sreloc; |
4118 | ||
c25bc9fc L |
4119 | /* Need a dynamic relocation to get the real function |
4120 | address. */ | |
710ab287 L |
4121 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
4122 | info, | |
4123 | input_section, | |
4124 | rel->r_offset); | |
4125 | if (outrel.r_offset == (bfd_vma) -1 | |
4126 | || outrel.r_offset == (bfd_vma) -2) | |
4127 | abort (); | |
4128 | ||
4129 | outrel.r_offset += (input_section->output_section->vma | |
4130 | + input_section->output_offset); | |
4131 | ||
4132 | if (h->dynindx == -1 | |
44c4ea11 | 4133 | || h->forced_local |
0e1862bb | 4134 | || bfd_link_executable (info)) |
710ab287 L |
4135 | { |
4136 | /* This symbol is resolved locally. */ | |
56b8aada L |
4137 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
4138 | outrel.r_addend = (h->root.u.def.value | |
4139 | + h->root.u.def.section->output_section->vma | |
4140 | + h->root.u.def.section->output_offset); | |
710ab287 L |
4141 | } |
4142 | else | |
4143 | { | |
351f65ca | 4144 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
4145 | outrel.r_addend = 0; |
4146 | } | |
4147 | ||
6de2ae4a | 4148 | sreloc = htab->elf.irelifunc; |
351f65ca | 4149 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
4150 | |
4151 | /* If this reloc is against an external symbol, we | |
4152 | do not want to fiddle with the addend. Otherwise, | |
4153 | we need to include the symbol value so that it | |
4154 | becomes an addend for the dynamic reloc. For an | |
4155 | internal symbol, we have updated addend. */ | |
56b8aada | 4156 | continue; |
710ab287 | 4157 | } |
17672001 | 4158 | /* FALLTHROUGH */ |
cbe950e9 | 4159 | case R_X86_64_PC32: |
c3320543 | 4160 | case R_X86_64_PC32_BND: |
cbe950e9 L |
4161 | case R_X86_64_PC64: |
4162 | case R_X86_64_PLT32: | |
c3320543 | 4163 | case R_X86_64_PLT32_BND: |
cbe950e9 L |
4164 | goto do_relocation; |
4165 | ||
4166 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
4167 | case R_X86_64_GOTPCRELX: |
4168 | case R_X86_64_REX_GOTPCRELX: | |
cbe950e9 | 4169 | case R_X86_64_GOTPCREL64: |
6de2ae4a | 4170 | base_got = htab->elf.sgot; |
cbe950e9 L |
4171 | off = h->got.offset; |
4172 | ||
7afd84dc | 4173 | if (base_got == NULL) |
cbe950e9 L |
4174 | abort (); |
4175 | ||
7afd84dc | 4176 | if (off == (bfd_vma) -1) |
cbe950e9 | 4177 | { |
7afd84dc L |
4178 | /* We can't use h->got.offset here to save state, or |
4179 | even just remember the offset, as finish_dynamic_symbol | |
4180 | would use that as offset into .got. */ | |
cbe950e9 | 4181 | |
6de2ae4a | 4182 | if (htab->elf.splt != NULL) |
7afd84dc | 4183 | { |
eed180f8 | 4184 | plt_index = h->plt.offset / plt_entry_size - 1; |
7afd84dc | 4185 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 4186 | base_got = htab->elf.sgotplt; |
7afd84dc | 4187 | } |
cbe950e9 L |
4188 | else |
4189 | { | |
eed180f8 | 4190 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 4191 | off = plt_index * GOT_ENTRY_SIZE; |
6de2ae4a | 4192 | base_got = htab->elf.igotplt; |
7afd84dc L |
4193 | } |
4194 | ||
4195 | if (h->dynindx == -1 | |
4196 | || h->forced_local | |
4197 | || info->symbolic) | |
4198 | { | |
eed180f8 | 4199 | /* This references the local defitionion. We must |
7afd84dc | 4200 | initialize this entry in the global offset table. |
eed180f8 | 4201 | Since the offset must always be a multiple of 8, |
7afd84dc L |
4202 | we use the least significant bit to record |
4203 | whether we have initialized it already. | |
4204 | ||
4205 | When doing a dynamic link, we create a .rela.got | |
4206 | relocation entry to initialize the value. This | |
4207 | is done in the finish_dynamic_symbol routine. */ | |
4208 | if ((off & 1) != 0) | |
4209 | off &= ~1; | |
4210 | else | |
4211 | { | |
4212 | bfd_put_64 (output_bfd, relocation, | |
4213 | base_got->contents + off); | |
4214 | /* Note that this is harmless for the GOTPLT64 | |
4215 | case, as -1 | 1 still is -1. */ | |
4216 | h->got.offset |= 1; | |
4217 | } | |
cbe950e9 L |
4218 | } |
4219 | } | |
4220 | ||
4221 | relocation = (base_got->output_section->vma | |
4222 | + base_got->output_offset + off); | |
4223 | ||
cbe950e9 L |
4224 | goto do_relocation; |
4225 | } | |
4226 | } | |
4227 | ||
70256ad8 AJ |
4228 | /* When generating a shared object, the relocations handled here are |
4229 | copied into the output file to be resolved at run time. */ | |
4230 | switch (r_type) | |
4231 | { | |
4232 | case R_X86_64_GOT32: | |
7b81dfbb | 4233 | case R_X86_64_GOT64: |
70256ad8 AJ |
4234 | /* Relocation is to the entry for this symbol in the global |
4235 | offset table. */ | |
70256ad8 | 4236 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
4237 | case R_X86_64_GOTPCRELX: |
4238 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
4239 | case R_X86_64_GOTPCREL64: |
4240 | /* Use global offset table entry as symbol value. */ | |
4241 | case R_X86_64_GOTPLT64: | |
553d1284 | 4242 | /* This is obsolete and treated the the same as GOT64. */ |
6de2ae4a | 4243 | base_got = htab->elf.sgot; |
7b81dfbb | 4244 | |
6de2ae4a | 4245 | if (htab->elf.sgot == NULL) |
c434dee6 | 4246 | abort (); |
053579d7 | 4247 | |
51e0a107 | 4248 | if (h != NULL) |
70256ad8 | 4249 | { |
b34976b6 | 4250 | bfd_boolean dyn; |
c434dee6 AJ |
4251 | |
4252 | off = h->got.offset; | |
7b81dfbb | 4253 | if (h->needs_plt |
eed180f8 | 4254 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
4255 | && off == (bfd_vma)-1) |
4256 | { | |
4257 | /* We can't use h->got.offset here to save | |
4258 | state, or even just remember the offset, as | |
4259 | finish_dynamic_symbol would use that as offset into | |
4260 | .got. */ | |
eed180f8 | 4261 | bfd_vma plt_index = h->plt.offset / plt_entry_size - 1; |
7b81dfbb | 4262 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 4263 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
4264 | } |
4265 | ||
c434dee6 | 4266 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 4267 | |
0e1862bb L |
4268 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
4269 | || (bfd_link_pic (info) | |
27482721 | 4270 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
4271 | || (ELF_ST_VISIBILITY (h->other) |
4272 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
4273 | { |
4274 | /* This is actually a static link, or it is a -Bsymbolic | |
4275 | link and the symbol is defined locally, or the symbol | |
407443a3 | 4276 | was forced to be local because of a version file. We |
51e0a107 JH |
4277 | must initialize this entry in the global offset table. |
4278 | Since the offset must always be a multiple of 8, we | |
4279 | use the least significant bit to record whether we | |
4280 | have initialized it already. | |
4281 | ||
4282 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
4283 | relocation entry to initialize the value. This is |
4284 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
4285 | if ((off & 1) != 0) |
4286 | off &= ~1; | |
4287 | else | |
4288 | { | |
4289 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
4290 | base_got->contents + off); |
4291 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 4292 | as -1 | 1 still is -1. */ |
51e0a107 JH |
4293 | h->got.offset |= 1; |
4294 | } | |
4295 | } | |
053579d7 | 4296 | else |
b34976b6 | 4297 | unresolved_reloc = FALSE; |
70256ad8 | 4298 | } |
51e0a107 JH |
4299 | else |
4300 | { | |
c434dee6 AJ |
4301 | if (local_got_offsets == NULL) |
4302 | abort (); | |
51e0a107 JH |
4303 | |
4304 | off = local_got_offsets[r_symndx]; | |
4305 | ||
4306 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
4307 | the least significant bit to record whether we have |
4308 | already generated the necessary reloc. */ | |
51e0a107 JH |
4309 | if ((off & 1) != 0) |
4310 | off &= ~1; | |
4311 | else | |
4312 | { | |
c434dee6 | 4313 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 4314 | base_got->contents + off); |
51e0a107 | 4315 | |
0e1862bb | 4316 | if (bfd_link_pic (info)) |
51e0a107 | 4317 | { |
947216bf | 4318 | asection *s; |
51e0a107 | 4319 | Elf_Internal_Rela outrel; |
70256ad8 | 4320 | |
51e0a107 JH |
4321 | /* We need to generate a R_X86_64_RELATIVE reloc |
4322 | for the dynamic linker. */ | |
6de2ae4a | 4323 | s = htab->elf.srelgot; |
947216bf | 4324 | if (s == NULL) |
c434dee6 | 4325 | abort (); |
51e0a107 | 4326 | |
7b81dfbb AJ |
4327 | outrel.r_offset = (base_got->output_section->vma |
4328 | + base_got->output_offset | |
51e0a107 | 4329 | + off); |
351f65ca | 4330 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
51e0a107 | 4331 | outrel.r_addend = relocation; |
351f65ca | 4332 | elf_append_rela (output_bfd, s, &outrel); |
51e0a107 JH |
4333 | } |
4334 | ||
4335 | local_got_offsets[r_symndx] |= 1; | |
4336 | } | |
51e0a107 | 4337 | } |
6a2bda3f | 4338 | |
c434dee6 AJ |
4339 | if (off >= (bfd_vma) -2) |
4340 | abort (); | |
4341 | ||
7b81dfbb AJ |
4342 | relocation = base_got->output_section->vma |
4343 | + base_got->output_offset + off; | |
56ceb5b5 L |
4344 | if (r_type != R_X86_64_GOTPCREL |
4345 | && r_type != R_X86_64_GOTPCRELX | |
4346 | && r_type != R_X86_64_REX_GOTPCRELX | |
4347 | && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
4348 | relocation -= htab->elf.sgotplt->output_section->vma |
4349 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 4350 | |
70256ad8 AJ |
4351 | break; |
4352 | ||
d6ab8113 JB |
4353 | case R_X86_64_GOTOFF64: |
4354 | /* Relocation is relative to the start of the global offset | |
4355 | table. */ | |
4356 | ||
3d949995 L |
4357 | /* Check to make sure it isn't a protected function or data |
4358 | symbol for shared library since it may not be local when | |
e3c0e327 L |
4359 | used as function address or with copy relocation. We also |
4360 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 4361 | if (bfd_link_pic (info) && h) |
d6ab8113 | 4362 | { |
e3c0e327 L |
4363 | if (!h->def_regular) |
4364 | { | |
4365 | const char *v; | |
4366 | ||
4367 | switch (ELF_ST_VISIBILITY (h->other)) | |
4368 | { | |
4369 | case STV_HIDDEN: | |
4370 | v = _("hidden symbol"); | |
4371 | break; | |
4372 | case STV_INTERNAL: | |
4373 | v = _("internal symbol"); | |
4374 | break; | |
4375 | case STV_PROTECTED: | |
4376 | v = _("protected symbol"); | |
4377 | break; | |
4378 | default: | |
4379 | v = _("symbol"); | |
4380 | break; | |
4381 | } | |
4382 | ||
4383 | (*_bfd_error_handler) | |
4384 | (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s `%s' can not be used when making a shared object"), | |
4385 | input_bfd, v, h->root.root.string); | |
4386 | bfd_set_error (bfd_error_bad_value); | |
4387 | return FALSE; | |
4388 | } | |
0e1862bb | 4389 | else if (!bfd_link_executable (info) |
e3c0e327 L |
4390 | && !SYMBOL_REFERENCES_LOCAL (info, h) |
4391 | && (h->type == STT_FUNC | |
4392 | || h->type == STT_OBJECT) | |
4393 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
4394 | { | |
4395 | (*_bfd_error_handler) | |
4396 | (_("%B: relocation R_X86_64_GOTOFF64 against protected %s `%s' can not be used when making a shared object"), | |
4397 | input_bfd, | |
4398 | h->type == STT_FUNC ? "function" : "data", | |
4399 | h->root.root.string); | |
4400 | bfd_set_error (bfd_error_bad_value); | |
d6ab8113 | 4401 | return FALSE; |
e3c0e327 | 4402 | } |
d6ab8113 JB |
4403 | } |
4404 | ||
4405 | /* Note that sgot is not involved in this | |
4406 | calculation. We always want the start of .got.plt. If we | |
4407 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
4408 | permitted by the ABI, we might have to change this | |
4409 | calculation. */ | |
6de2ae4a L |
4410 | relocation -= htab->elf.sgotplt->output_section->vma |
4411 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4412 | break; |
4413 | ||
4414 | case R_X86_64_GOTPC32: | |
7b81dfbb | 4415 | case R_X86_64_GOTPC64: |
d6ab8113 | 4416 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
4417 | relocation = htab->elf.sgotplt->output_section->vma |
4418 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4419 | unresolved_reloc = FALSE; |
4420 | break; | |
7b81dfbb AJ |
4421 | |
4422 | case R_X86_64_PLTOFF64: | |
4423 | /* Relocation is PLT entry relative to GOT. For local | |
4424 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 4425 | if (h != NULL |
7b81dfbb AJ |
4426 | /* See PLT32 handling. */ |
4427 | && h->plt.offset != (bfd_vma) -1 | |
6de2ae4a | 4428 | && htab->elf.splt != NULL) |
7b81dfbb | 4429 | { |
0ff2b86e L |
4430 | if (htab->plt_bnd != NULL) |
4431 | { | |
4432 | resolved_plt = htab->plt_bnd; | |
4433 | plt_offset = eh->plt_bnd.offset; | |
4434 | } | |
4435 | else | |
4436 | { | |
4437 | resolved_plt = htab->elf.splt; | |
4438 | plt_offset = h->plt.offset; | |
4439 | } | |
4440 | ||
4441 | relocation = (resolved_plt->output_section->vma | |
4442 | + resolved_plt->output_offset | |
4443 | + plt_offset); | |
7b81dfbb AJ |
4444 | unresolved_reloc = FALSE; |
4445 | } | |
4446 | ||
6de2ae4a L |
4447 | relocation -= htab->elf.sgotplt->output_section->vma |
4448 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 4449 | break; |
d6ab8113 | 4450 | |
70256ad8 | 4451 | case R_X86_64_PLT32: |
c3320543 | 4452 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
4453 | /* Relocation is to the entry for this symbol in the |
4454 | procedure linkage table. */ | |
4455 | ||
4456 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 4457 | without using the procedure linkage table. */ |
70256ad8 AJ |
4458 | if (h == NULL) |
4459 | break; | |
4460 | ||
dd7e64d4 L |
4461 | if ((h->plt.offset == (bfd_vma) -1 |
4462 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 4463 | || htab->elf.splt == NULL) |
70256ad8 AJ |
4464 | { |
4465 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
4466 | happens when statically linking PIC code, or when |
4467 | using -Bsymbolic. */ | |
70256ad8 AJ |
4468 | break; |
4469 | } | |
4470 | ||
dd7e64d4 | 4471 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 4472 | { |
dd7e64d4 L |
4473 | if (htab->plt_bnd != NULL) |
4474 | { | |
4475 | resolved_plt = htab->plt_bnd; | |
4476 | plt_offset = eh->plt_bnd.offset; | |
4477 | } | |
4478 | else | |
4479 | { | |
4480 | resolved_plt = htab->elf.splt; | |
4481 | plt_offset = h->plt.offset; | |
4482 | } | |
0ff2b86e L |
4483 | } |
4484 | else | |
4485 | { | |
dd7e64d4 L |
4486 | /* Use the GOT PLT. */ |
4487 | resolved_plt = htab->plt_got; | |
4488 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
4489 | } |
4490 | ||
4491 | relocation = (resolved_plt->output_section->vma | |
4492 | + resolved_plt->output_offset | |
4493 | + plt_offset); | |
b34976b6 | 4494 | unresolved_reloc = FALSE; |
70256ad8 AJ |
4495 | break; |
4496 | ||
1788fc08 L |
4497 | case R_X86_64_SIZE32: |
4498 | case R_X86_64_SIZE64: | |
1788fc08 L |
4499 | /* Set to symbol size. */ |
4500 | relocation = st_size; | |
4501 | goto direct; | |
4502 | ||
fd8ab9e5 AJ |
4503 | case R_X86_64_PC8: |
4504 | case R_X86_64_PC16: | |
4505 | case R_X86_64_PC32: | |
c3320543 | 4506 | case R_X86_64_PC32_BND: |
6333bc0d L |
4507 | /* Don't complain about -fPIC if the symbol is undefined when |
4508 | building executable. */ | |
0e1862bb | 4509 | if (bfd_link_pic (info) |
ba3bee0b | 4510 | && (input_section->flags & SEC_ALLOC) != 0 |
90f487df | 4511 | && (input_section->flags & SEC_READONLY) != 0 |
6333bc0d | 4512 | && h != NULL |
0e1862bb | 4513 | && !(bfd_link_executable (info) |
6333bc0d | 4514 | && h->root.type == bfd_link_hash_undefined)) |
6610a52d | 4515 | { |
41bed6dd L |
4516 | bfd_boolean fail = FALSE; |
4517 | bfd_boolean branch | |
c3320543 L |
4518 | = ((r_type == R_X86_64_PC32 |
4519 | || r_type == R_X86_64_PC32_BND) | |
41bed6dd L |
4520 | && is_32bit_relative_branch (contents, rel->r_offset)); |
4521 | ||
4522 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
4523 | { | |
4524 | /* Symbol is referenced locally. Make sure it is | |
4525 | defined locally or for a branch. */ | |
4526 | fail = !h->def_regular && !branch; | |
4527 | } | |
0e1862bb | 4528 | else if (!(bfd_link_executable (info) |
bc696fd5 | 4529 | && (h->needs_copy || eh->needs_copy))) |
41bed6dd | 4530 | { |
9a926d55 L |
4531 | /* Symbol doesn't need copy reloc and isn't referenced |
4532 | locally. We only allow branch to symbol with | |
4533 | non-default visibility. */ | |
41bed6dd L |
4534 | fail = (!branch |
4535 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
4536 | } | |
4537 | ||
4538 | if (fail) | |
4539 | { | |
4540 | const char *fmt; | |
4541 | const char *v; | |
4542 | const char *pic = ""; | |
4543 | ||
4544 | switch (ELF_ST_VISIBILITY (h->other)) | |
4545 | { | |
4546 | case STV_HIDDEN: | |
4547 | v = _("hidden symbol"); | |
4548 | break; | |
4549 | case STV_INTERNAL: | |
4550 | v = _("internal symbol"); | |
4551 | break; | |
4552 | case STV_PROTECTED: | |
4553 | v = _("protected symbol"); | |
4554 | break; | |
4555 | default: | |
4556 | v = _("symbol"); | |
4557 | pic = _("; recompile with -fPIC"); | |
4558 | break; | |
4559 | } | |
4560 | ||
4561 | if (h->def_regular) | |
4562 | fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s"); | |
4563 | else | |
4564 | fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s"); | |
4565 | ||
4566 | (*_bfd_error_handler) (fmt, input_bfd, | |
4567 | x86_64_elf_howto_table[r_type].name, | |
4568 | v, h->root.root.string, pic); | |
4569 | bfd_set_error (bfd_error_bad_value); | |
4570 | return FALSE; | |
4571 | } | |
6610a52d L |
4572 | } |
4573 | /* Fall through. */ | |
4574 | ||
70256ad8 AJ |
4575 | case R_X86_64_8: |
4576 | case R_X86_64_16: | |
4577 | case R_X86_64_32: | |
d6ab8113 | 4578 | case R_X86_64_PC64: |
6b3db546 | 4579 | case R_X86_64_64: |
80643fbc | 4580 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 4581 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 4582 | |
1788fc08 | 4583 | direct: |
b1e24c02 | 4584 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
4585 | break; |
4586 | ||
9a926d55 | 4587 | /* Don't copy a pc-relative relocation into the output file |
6333bc0d | 4588 | if the symbol needs copy reloc or the symbol is undefined |
04ebc307 L |
4589 | when building executable. Copy dynamic function pointer |
4590 | relocations. */ | |
0e1862bb L |
4591 | if ((bfd_link_pic (info) |
4592 | && !(bfd_link_executable (info) | |
fd9edc90 | 4593 | && h != NULL |
6333bc0d L |
4594 | && (h->needs_copy |
4595 | || eh->needs_copy | |
4596 | || h->root.type == bfd_link_hash_undefined) | |
9a926d55 | 4597 | && IS_X86_64_PCREL_TYPE (r_type)) |
4bc6e03a AJ |
4598 | && (h == NULL |
4599 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
4600 | || h->root.type != bfd_link_hash_undefweak) | |
1788fc08 L |
4601 | && ((! IS_X86_64_PCREL_TYPE (r_type) |
4602 | && r_type != R_X86_64_SIZE32 | |
4603 | && r_type != R_X86_64_SIZE64) | |
d8045f23 | 4604 | || ! SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c | 4605 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 4606 | && !bfd_link_pic (info) |
c434dee6 AJ |
4607 | && h != NULL |
4608 | && h->dynindx != -1 | |
04ebc307 | 4609 | && (!h->non_got_ref || eh->func_pointer_refcount > 0) |
f5385ebf AM |
4610 | && ((h->def_dynamic |
4611 | && !h->def_regular) | |
c434dee6 | 4612 | || h->root.type == bfd_link_hash_undefweak |
0f88be7a | 4613 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
4614 | { |
4615 | Elf_Internal_Rela outrel; | |
b34976b6 | 4616 | bfd_boolean skip, relocate; |
c434dee6 | 4617 | asection *sreloc; |
70256ad8 AJ |
4618 | |
4619 | /* When generating a shared object, these relocations | |
4620 | are copied into the output file to be resolved at run | |
407443a3 | 4621 | time. */ |
b34976b6 AM |
4622 | skip = FALSE; |
4623 | relocate = FALSE; | |
70256ad8 | 4624 | |
c629eae0 JJ |
4625 | outrel.r_offset = |
4626 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 4627 | rel->r_offset); |
c629eae0 | 4628 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 4629 | skip = TRUE; |
0fb19cbc | 4630 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 4631 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
4632 | |
4633 | outrel.r_offset += (input_section->output_section->vma | |
4634 | + input_section->output_offset); | |
4635 | ||
4636 | if (skip) | |
0bb2d96a | 4637 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 4638 | |
fd8ab9e5 AJ |
4639 | /* h->dynindx may be -1 if this symbol was marked to |
4640 | become local. */ | |
4641 | else if (h != NULL | |
c434dee6 | 4642 | && h->dynindx != -1 |
d8045f23 | 4643 | && (IS_X86_64_PCREL_TYPE (r_type) |
0e1862bb | 4644 | || ! bfd_link_pic (info) |
d8045f23 NC |
4645 | || ! SYMBOLIC_BIND (info, h) |
4646 | || ! h->def_regular)) | |
70256ad8 | 4647 | { |
351f65ca | 4648 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 4649 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
4650 | } |
4651 | else | |
4652 | { | |
c434dee6 | 4653 | /* This symbol is local, or marked to become local. */ |
248775ba | 4654 | if (r_type == htab->pointer_r_type) |
607c0e09 | 4655 | { |
b34976b6 | 4656 | relocate = TRUE; |
351f65ca | 4657 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
4658 | outrel.r_addend = relocation + rel->r_addend; |
4659 | } | |
64d25c44 L |
4660 | else if (r_type == R_X86_64_64 |
4661 | && !ABI_64_P (output_bfd)) | |
4662 | { | |
4663 | relocate = TRUE; | |
4664 | outrel.r_info = htab->r_info (0, | |
4665 | R_X86_64_RELATIVE64); | |
4666 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
4667 | /* Check addend overflow. */ |
4668 | if ((outrel.r_addend & 0x80000000) | |
4669 | != (rel->r_addend & 0x80000000)) | |
4670 | { | |
4671 | const char *name; | |
268a8d3a | 4672 | int addend = rel->r_addend; |
8cf0d2dd L |
4673 | if (h && h->root.root.string) |
4674 | name = h->root.root.string; | |
4675 | else | |
4676 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
4677 | sym, NULL); | |
6f2c9068 L |
4678 | if (addend < 0) |
4679 | (*_bfd_error_handler) | |
268a8d3a | 4680 | (_("%B: addend -0x%x in relocation %s against " |
6f2c9068 L |
4681 | "symbol `%s' at 0x%lx in section `%A' is " |
4682 | "out of range"), | |
4683 | input_bfd, input_section, addend, | |
4684 | x86_64_elf_howto_table[r_type].name, | |
4685 | name, (unsigned long) rel->r_offset); | |
4686 | else | |
4687 | (*_bfd_error_handler) | |
268a8d3a | 4688 | (_("%B: addend 0x%x in relocation %s against " |
6f2c9068 L |
4689 | "symbol `%s' at 0x%lx in section `%A' is " |
4690 | "out of range"), | |
4691 | input_bfd, input_section, addend, | |
4692 | x86_64_elf_howto_table[r_type].name, | |
4693 | name, (unsigned long) rel->r_offset); | |
8cf0d2dd L |
4694 | bfd_set_error (bfd_error_bad_value); |
4695 | return FALSE; | |
4696 | } | |
64d25c44 | 4697 | } |
607c0e09 AS |
4698 | else |
4699 | { | |
4700 | long sindx; | |
4701 | ||
8517fae7 | 4702 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
4703 | sindx = 0; |
4704 | else if (sec == NULL || sec->owner == NULL) | |
4705 | { | |
4706 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 4707 | return FALSE; |
607c0e09 AS |
4708 | } |
4709 | else | |
4710 | { | |
4711 | asection *osec; | |
4712 | ||
74541ad4 AM |
4713 | /* We are turning this relocation into one |
4714 | against a section symbol. It would be | |
4715 | proper to subtract the symbol's value, | |
4716 | osec->vma, from the emitted reloc addend, | |
4717 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
4718 | osec = sec->output_section; |
4719 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
4720 | if (sindx == 0) |
4721 | { | |
4722 | asection *oi = htab->elf.text_index_section; | |
4723 | sindx = elf_section_data (oi)->dynindx; | |
4724 | } | |
4725 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
4726 | } |
4727 | ||
351f65ca | 4728 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
4729 | outrel.r_addend = relocation + rel->r_addend; |
4730 | } | |
70256ad8 AJ |
4731 | } |
4732 | ||
cbe950e9 | 4733 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 4734 | |
62d78908 L |
4735 | if (sreloc == NULL || sreloc->contents == NULL) |
4736 | { | |
4737 | r = bfd_reloc_notsupported; | |
4738 | goto check_relocation_error; | |
4739 | } | |
c434dee6 | 4740 | |
351f65ca | 4741 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
4742 | |
4743 | /* If this reloc is against an external symbol, we do | |
4744 | not want to fiddle with the addend. Otherwise, we | |
4745 | need to include the symbol value so that it becomes | |
4746 | an addend for the dynamic reloc. */ | |
0f88be7a | 4747 | if (! relocate) |
70256ad8 AJ |
4748 | continue; |
4749 | } | |
4750 | ||
4751 | break; | |
4752 | ||
bffbf940 | 4753 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
4754 | case R_X86_64_GOTPC32_TLSDESC: |
4755 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 4756 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
4757 | tls_type = GOT_UNKNOWN; |
4758 | if (h == NULL && local_got_offsets) | |
351f65ca | 4759 | tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 4760 | else if (h != NULL) |
351f65ca | 4761 | tls_type = elf_x86_64_hash_entry (h)->tls_type; |
142411ca | 4762 | |
351f65ca L |
4763 | if (! elf_x86_64_tls_transition (info, input_bfd, |
4764 | input_section, contents, | |
4765 | symtab_hdr, sym_hashes, | |
4766 | &r_type, tls_type, rel, | |
4767 | relend, h, r_symndx)) | |
534a31f6 | 4768 | return FALSE; |
bffbf940 JJ |
4769 | |
4770 | if (r_type == R_X86_64_TPOFF32) | |
4771 | { | |
142411ca L |
4772 | bfd_vma roff = rel->r_offset; |
4773 | ||
bffbf940 | 4774 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 4775 | |
351f65ca | 4776 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 4777 | { |
52bc799a | 4778 | /* GD->LE transition. For 64bit, change |
abcf1d52 | 4779 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
a3fadc9a | 4780 | .word 0x6666; rex64; call __tls_get_addr |
52bc799a | 4781 | into: |
bffbf940 | 4782 | movq %fs:0, %rax |
52bc799a L |
4783 | leaq foo@tpoff(%rax), %rax |
4784 | For 32bit, change | |
4785 | leaq foo@tlsgd(%rip), %rdi | |
4786 | .word 0x6666; rex64; call __tls_get_addr | |
4787 | into: | |
4788 | movl %fs:0, %eax | |
5c98a14e JJ |
4789 | leaq foo@tpoff(%rax), %rax |
4790 | For largepic, change: | |
4791 | leaq foo@tlsgd(%rip), %rdi | |
4792 | movabsq $__tls_get_addr@pltoff, %rax | |
4793 | addq %rbx, %rax | |
4794 | call *%rax | |
4795 | into: | |
4796 | movq %fs:0, %rax | |
4797 | leaq foo@tpoff(%rax), %rax | |
4798 | nopw 0x0(%rax,%rax,1) */ | |
4799 | int largepic = 0; | |
4800 | if (ABI_64_P (output_bfd) | |
4801 | && contents[roff + 5] == (bfd_byte) '\xb8') | |
4802 | { | |
4803 | memcpy (contents + roff - 3, | |
4804 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
4805 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
4806 | largepic = 1; | |
4807 | } | |
4808 | else if (ABI_64_P (output_bfd)) | |
52bc799a L |
4809 | memcpy (contents + roff - 4, |
4810 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
4811 | 16); | |
4812 | else | |
4813 | memcpy (contents + roff - 3, | |
4814 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
4815 | 15); | |
eb4ff4d6 | 4816 | bfd_put_32 (output_bfd, |
351f65ca | 4817 | elf_x86_64_tpoff (info, relocation), |
5c98a14e JJ |
4818 | contents + roff + 8 + largepic); |
4819 | /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
bffbf940 | 4820 | rel++; |
60f2e42e | 4821 | wrel++; |
bffbf940 JJ |
4822 | continue; |
4823 | } | |
351f65ca | 4824 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
4825 | { |
4826 | /* GDesc -> LE transition. | |
4827 | It's originally something like: | |
4828 | leaq x@tlsdesc(%rip), %rax | |
4829 | ||
4830 | Change it to: | |
c9736ba0 | 4831 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 4832 | |
c9736ba0 | 4833 | unsigned int val, type; |
67a4f2b7 | 4834 | |
67a4f2b7 | 4835 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 4836 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
4837 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
4838 | contents + roff - 3); | |
4839 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
4840 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4841 | contents + roff - 1); | |
eb4ff4d6 | 4842 | bfd_put_32 (output_bfd, |
351f65ca | 4843 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
4844 | contents + roff); |
4845 | continue; | |
4846 | } | |
351f65ca | 4847 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
4848 | { |
4849 | /* GDesc -> LE transition. | |
4850 | It's originally: | |
4851 | call *(%rax) | |
4852 | Turn it into: | |
142411ca | 4853 | xchg %ax,%ax. */ |
10efb593 | 4854 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
4855 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4856 | continue; | |
4857 | } | |
351f65ca | 4858 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 4859 | { |
bffbf940 | 4860 | /* IE->LE transition: |
cf61b747 | 4861 | For 64bit, originally it can be one of: |
bffbf940 JJ |
4862 | movq foo@gottpoff(%rip), %reg |
4863 | addq foo@gottpoff(%rip), %reg | |
4864 | We change it into: | |
4865 | movq $foo, %reg | |
4866 | leaq foo(%reg), %reg | |
cf61b747 L |
4867 | addq $foo, %reg. |
4868 | For 32bit, originally it can be one of: | |
4869 | movq foo@gottpoff(%rip), %reg | |
4870 | addl foo@gottpoff(%rip), %reg | |
4871 | We change it into: | |
4872 | movq $foo, %reg | |
4873 | leal foo(%reg), %reg | |
4874 | addl $foo, %reg. */ | |
142411ca L |
4875 | |
4876 | unsigned int val, type, reg; | |
4877 | ||
cf61b747 L |
4878 | if (roff >= 3) |
4879 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
4880 | else | |
4881 | val = 0; | |
142411ca L |
4882 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
4883 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 4884 | reg >>= 3; |
bffbf940 JJ |
4885 | if (type == 0x8b) |
4886 | { | |
4887 | /* movq */ | |
4888 | if (val == 0x4c) | |
4889 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 4890 | contents + roff - 3); |
4a4c5f25 L |
4891 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4892 | bfd_put_8 (output_bfd, 0x41, | |
4893 | contents + roff - 3); | |
bffbf940 | 4894 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 4895 | contents + roff - 2); |
bffbf940 | 4896 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 4897 | contents + roff - 1); |
bffbf940 JJ |
4898 | } |
4899 | else if (reg == 4) | |
4900 | { | |
cf61b747 L |
4901 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
4902 | is special */ | |
bffbf940 JJ |
4903 | if (val == 0x4c) |
4904 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 4905 | contents + roff - 3); |
4a4c5f25 L |
4906 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4907 | bfd_put_8 (output_bfd, 0x41, | |
4908 | contents + roff - 3); | |
bffbf940 | 4909 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 4910 | contents + roff - 2); |
bffbf940 | 4911 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 4912 | contents + roff - 1); |
bffbf940 JJ |
4913 | } |
4914 | else | |
4915 | { | |
cf61b747 | 4916 | /* addq/addl -> leaq/leal */ |
bffbf940 JJ |
4917 | if (val == 0x4c) |
4918 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 4919 | contents + roff - 3); |
4a4c5f25 L |
4920 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4921 | bfd_put_8 (output_bfd, 0x45, | |
4922 | contents + roff - 3); | |
bffbf940 | 4923 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 4924 | contents + roff - 2); |
bffbf940 | 4925 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 4926 | contents + roff - 1); |
bffbf940 | 4927 | } |
eb4ff4d6 | 4928 | bfd_put_32 (output_bfd, |
351f65ca | 4929 | elf_x86_64_tpoff (info, relocation), |
142411ca | 4930 | contents + roff); |
bffbf940 JJ |
4931 | continue; |
4932 | } | |
142411ca L |
4933 | else |
4934 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
4935 | } |
4936 | ||
6de2ae4a | 4937 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
4938 | abort (); |
4939 | ||
4940 | if (h != NULL) | |
67a4f2b7 AO |
4941 | { |
4942 | off = h->got.offset; | |
351f65ca | 4943 | offplt = elf_x86_64_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 4944 | } |
bffbf940 JJ |
4945 | else |
4946 | { | |
4947 | if (local_got_offsets == NULL) | |
4948 | abort (); | |
4949 | ||
4950 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 4951 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
4952 | } |
4953 | ||
4954 | if ((off & 1) != 0) | |
4955 | off &= ~1; | |
26e41594 | 4956 | else |
bffbf940 JJ |
4957 | { |
4958 | Elf_Internal_Rela outrel; | |
bffbf940 | 4959 | int dr_type, indx; |
67a4f2b7 | 4960 | asection *sreloc; |
bffbf940 | 4961 | |
6de2ae4a | 4962 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
4963 | abort (); |
4964 | ||
67a4f2b7 AO |
4965 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4966 | ||
4967 | if (GOT_TLS_GDESC_P (tls_type)) | |
4968 | { | |
351f65ca | 4969 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 4970 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
4971 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
4972 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4973 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4974 | + offplt |
4975 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4976 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4977 | if (indx == 0) |
351f65ca | 4978 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
67a4f2b7 AO |
4979 | else |
4980 | outrel.r_addend = 0; | |
351f65ca | 4981 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
4982 | } |
4983 | ||
6de2ae4a | 4984 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4985 | |
6de2ae4a L |
4986 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4987 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 4988 | |
67a4f2b7 | 4989 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 4990 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
4991 | else if (GOT_TLS_GDESC_P (tls_type)) |
4992 | goto dr_done; | |
bffbf940 JJ |
4993 | else |
4994 | dr_type = R_X86_64_TPOFF64; | |
4995 | ||
6de2ae4a | 4996 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 4997 | outrel.r_addend = 0; |
67a4f2b7 AO |
4998 | if ((dr_type == R_X86_64_TPOFF64 |
4999 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
351f65ca L |
5000 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
5001 | outrel.r_info = htab->r_info (indx, dr_type); | |
bffbf940 | 5002 | |
351f65ca | 5003 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 5004 | |
67a4f2b7 | 5005 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
5006 | { |
5007 | if (indx == 0) | |
5008 | { | |
d40d037c | 5009 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 5010 | bfd_put_64 (output_bfd, |
351f65ca | 5011 | relocation - elf_x86_64_dtpoff_base (info), |
6de2ae4a | 5012 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
5013 | } |
5014 | else | |
5015 | { | |
5016 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5017 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5018 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
5019 | R_X86_64_DTPOFF64); |
5020 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 5021 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 5022 | &outrel); |
bffbf940 JJ |
5023 | } |
5024 | } | |
5025 | ||
67a4f2b7 | 5026 | dr_done: |
bffbf940 JJ |
5027 | if (h != NULL) |
5028 | h->got.offset |= 1; | |
5029 | else | |
5030 | local_got_offsets[r_symndx] |= 1; | |
5031 | } | |
5032 | ||
67a4f2b7 AO |
5033 | if (off >= (bfd_vma) -2 |
5034 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 5035 | abort (); |
351f65ca | 5036 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 5037 | { |
67a4f2b7 AO |
5038 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
5039 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
5040 | relocation = htab->elf.sgotplt->output_section->vma |
5041 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
5042 | + offplt + htab->sgotplt_jump_table_size; |
5043 | else | |
6de2ae4a L |
5044 | relocation = htab->elf.sgot->output_section->vma |
5045 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5046 | unresolved_reloc = FALSE; |
bffbf940 | 5047 | } |
142411ca | 5048 | else |
67a4f2b7 | 5049 | { |
142411ca | 5050 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 5051 | |
351f65ca | 5052 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 5053 | { |
52bc799a | 5054 | /* GD->IE transition. For 64bit, change |
142411ca L |
5055 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
5056 | .word 0x6666; rex64; call __tls_get_addr@plt | |
52bc799a | 5057 | into: |
142411ca | 5058 | movq %fs:0, %rax |
52bc799a L |
5059 | addq foo@gottpoff(%rip), %rax |
5060 | For 32bit, change | |
5061 | leaq foo@tlsgd(%rip), %rdi | |
5062 | .word 0x6666; rex64; call __tls_get_addr@plt | |
5063 | into: | |
5064 | movl %fs:0, %eax | |
5c98a14e JJ |
5065 | addq foo@gottpoff(%rip), %rax |
5066 | For largepic, change: | |
5067 | leaq foo@tlsgd(%rip), %rdi | |
5068 | movabsq $__tls_get_addr@pltoff, %rax | |
5069 | addq %rbx, %rax | |
5070 | call *%rax | |
5071 | into: | |
5072 | movq %fs:0, %rax | |
5073 | addq foo@gottpoff(%rax), %rax | |
5074 | nopw 0x0(%rax,%rax,1) */ | |
5075 | int largepic = 0; | |
5076 | if (ABI_64_P (output_bfd) | |
5077 | && contents[roff + 5] == (bfd_byte) '\xb8') | |
5078 | { | |
5079 | memcpy (contents + roff - 3, | |
5080 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
5081 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
5082 | largepic = 1; | |
5083 | } | |
5084 | else if (ABI_64_P (output_bfd)) | |
52bc799a L |
5085 | memcpy (contents + roff - 4, |
5086 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
5087 | 16); | |
5088 | else | |
5089 | memcpy (contents + roff - 3, | |
5090 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
5091 | 15); | |
142411ca | 5092 | |
6de2ae4a L |
5093 | relocation = (htab->elf.sgot->output_section->vma |
5094 | + htab->elf.sgot->output_offset + off | |
142411ca | 5095 | - roff |
5c98a14e | 5096 | - largepic |
142411ca L |
5097 | - input_section->output_section->vma |
5098 | - input_section->output_offset | |
5099 | - 12); | |
5100 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
5101 | contents + roff + 8 + largepic); |
5102 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 5103 | rel++; |
60f2e42e | 5104 | wrel++; |
142411ca L |
5105 | continue; |
5106 | } | |
351f65ca | 5107 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
5108 | { |
5109 | /* GDesc -> IE transition. | |
5110 | It's originally something like: | |
5111 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 5112 | |
142411ca | 5113 | Change it to: |
c9736ba0 | 5114 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 5115 | |
142411ca L |
5116 | /* Now modify the instruction as appropriate. To |
5117 | turn a leaq into a movq in the form we use it, it | |
5118 | suffices to change the second byte from 0x8d to | |
5119 | 0x8b. */ | |
5120 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
5121 | ||
5122 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
5123 | htab->elf.sgot->output_section->vma |
5124 | + htab->elf.sgot->output_offset + off | |
142411ca L |
5125 | - rel->r_offset |
5126 | - input_section->output_section->vma | |
5127 | - input_section->output_offset | |
5128 | - 4, | |
5129 | contents + roff); | |
5130 | continue; | |
5131 | } | |
351f65ca | 5132 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
5133 | { |
5134 | /* GDesc -> IE transition. | |
5135 | It's originally: | |
5136 | call *(%rax) | |
5137 | ||
5138 | Change it to: | |
c9736ba0 | 5139 | xchg %ax, %ax. */ |
142411ca | 5140 | |
142411ca L |
5141 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
5142 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
5143 | continue; | |
5144 | } | |
5145 | else | |
5146 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 5147 | } |
bffbf940 JJ |
5148 | break; |
5149 | ||
5150 | case R_X86_64_TLSLD: | |
351f65ca L |
5151 | if (! elf_x86_64_tls_transition (info, input_bfd, |
5152 | input_section, contents, | |
5153 | symtab_hdr, sym_hashes, | |
5154 | &r_type, GOT_UNKNOWN, | |
5155 | rel, relend, h, r_symndx)) | |
142411ca | 5156 | return FALSE; |
a3fadc9a | 5157 | |
142411ca L |
5158 | if (r_type != R_X86_64_TLSLD) |
5159 | { | |
bffbf940 | 5160 | /* LD->LE transition: |
a3fadc9a | 5161 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr. |
52bc799a L |
5162 | For 64bit, we change it into: |
5163 | .word 0x6666; .byte 0x66; movq %fs:0, %rax. | |
5164 | For 32bit, we change it into: | |
5c98a14e JJ |
5165 | nopl 0x0(%rax); movl %fs:0, %eax. |
5166 | For largepic, change: | |
5167 | leaq foo@tlsgd(%rip), %rdi | |
5168 | movabsq $__tls_get_addr@pltoff, %rax | |
5169 | addq %rbx, %rax | |
5170 | call *%rax | |
5171 | into: | |
5172 | data32 data32 data32 nopw %cs:0x0(%rax,%rax,1) | |
5173 | movq %fs:0, %eax */ | |
142411ca L |
5174 | |
5175 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
5c98a14e JJ |
5176 | if (ABI_64_P (output_bfd) |
5177 | && contents[rel->r_offset + 5] == (bfd_byte) '\xb8') | |
5178 | memcpy (contents + rel->r_offset - 3, | |
5179 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
5180 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
5181 | else if (ABI_64_P (output_bfd)) | |
52bc799a L |
5182 | memcpy (contents + rel->r_offset - 3, |
5183 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
5184 | else | |
5185 | memcpy (contents + rel->r_offset - 3, | |
5186 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
5c98a14e | 5187 | /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */ |
bffbf940 | 5188 | rel++; |
60f2e42e | 5189 | wrel++; |
bffbf940 JJ |
5190 | continue; |
5191 | } | |
5192 | ||
6de2ae4a | 5193 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
5194 | abort (); |
5195 | ||
5196 | off = htab->tls_ld_got.offset; | |
5197 | if (off & 1) | |
5198 | off &= ~1; | |
5199 | else | |
5200 | { | |
5201 | Elf_Internal_Rela outrel; | |
bffbf940 | 5202 | |
6de2ae4a | 5203 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
5204 | abort (); |
5205 | ||
6de2ae4a L |
5206 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5207 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
5208 | |
5209 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5210 | htab->elf.sgot->contents + off); |
bffbf940 | 5211 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 5212 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5213 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 5214 | outrel.r_addend = 0; |
351f65ca | 5215 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 5216 | &outrel); |
bffbf940 JJ |
5217 | htab->tls_ld_got.offset |= 1; |
5218 | } | |
6de2ae4a L |
5219 | relocation = htab->elf.sgot->output_section->vma |
5220 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5221 | unresolved_reloc = FALSE; |
bffbf940 JJ |
5222 | break; |
5223 | ||
5224 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
5225 | if (!bfd_link_executable (info) |
5226 | || (input_section->flags & SEC_CODE) == 0) | |
351f65ca | 5227 | relocation -= elf_x86_64_dtpoff_base (info); |
bffbf940 | 5228 | else |
351f65ca | 5229 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5230 | break; |
5231 | ||
5232 | case R_X86_64_TPOFF32: | |
6769d501 | 5233 | case R_X86_64_TPOFF64: |
0e1862bb | 5234 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 5235 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5236 | break; |
5237 | ||
a69ed7f7 L |
5238 | case R_X86_64_DTPOFF64: |
5239 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
5240 | relocation -= elf_x86_64_dtpoff_base (info); | |
5241 | break; | |
5242 | ||
70256ad8 AJ |
5243 | default: |
5244 | break; | |
5245 | } | |
8d88c4ca | 5246 | |
239e1f3a AM |
5247 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
5248 | because such sections are not SEC_ALLOC and thus ld.so will | |
5249 | not process them. */ | |
c434dee6 | 5250 | if (unresolved_reloc |
239e1f3a | 5251 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
5252 | && h->def_dynamic) |
5253 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
5254 | rel->r_offset) != (bfd_vma) -1) | |
a040981f L |
5255 | { |
5256 | (*_bfd_error_handler) | |
5257 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), | |
5258 | input_bfd, | |
5259 | input_section, | |
5260 | (long) rel->r_offset, | |
5261 | howto->name, | |
5262 | h->root.root.string); | |
5263 | return FALSE; | |
5264 | } | |
c434dee6 | 5265 | |
cbe950e9 | 5266 | do_relocation: |
8d88c4ca | 5267 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
5268 | contents, rel->r_offset, |
5269 | relocation, rel->r_addend); | |
8d88c4ca | 5270 | |
62d78908 | 5271 | check_relocation_error: |
8d88c4ca | 5272 | if (r != bfd_reloc_ok) |
8da6118f | 5273 | { |
c434dee6 AJ |
5274 | const char *name; |
5275 | ||
5276 | if (h != NULL) | |
5277 | name = h->root.root.string; | |
5278 | else | |
8da6118f | 5279 | { |
c434dee6 AJ |
5280 | name = bfd_elf_string_from_elf_section (input_bfd, |
5281 | symtab_hdr->sh_link, | |
5282 | sym->st_name); | |
5283 | if (name == NULL) | |
b34976b6 | 5284 | return FALSE; |
c434dee6 AJ |
5285 | if (*name == '\0') |
5286 | name = bfd_section_name (input_bfd, sec); | |
5287 | } | |
5288 | ||
5289 | if (r == bfd_reloc_overflow) | |
5290 | { | |
c434dee6 | 5291 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
5292 | (info, (h ? &h->root : NULL), name, howto->name, |
5293 | (bfd_vma) 0, input_bfd, input_section, | |
5294 | rel->r_offset))) | |
b34976b6 | 5295 | return FALSE; |
c434dee6 AJ |
5296 | } |
5297 | else | |
5298 | { | |
5299 | (*_bfd_error_handler) | |
bb95161d | 5300 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
d003868e | 5301 | input_bfd, input_section, |
c434dee6 | 5302 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 5303 | return FALSE; |
8da6118f KH |
5304 | } |
5305 | } | |
60f2e42e L |
5306 | |
5307 | if (wrel != rel) | |
5308 | *wrel = *rel; | |
5309 | } | |
5310 | ||
5311 | if (wrel != rel) | |
5312 | { | |
5313 | Elf_Internal_Shdr *rel_hdr; | |
5314 | size_t deleted = rel - wrel; | |
5315 | ||
5316 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
5317 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5318 | if (rel_hdr->sh_size == 0) | |
5319 | { | |
5320 | /* It is too late to remove an empty reloc section. Leave | |
5321 | one NONE reloc. | |
5322 | ??? What is wrong with an empty section??? */ | |
5323 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
5324 | deleted -= 1; | |
5325 | } | |
5326 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
5327 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5328 | input_section->reloc_count -= deleted; | |
8d88c4ca | 5329 | } |
70256ad8 | 5330 | |
b34976b6 | 5331 | return TRUE; |
70256ad8 AJ |
5332 | } |
5333 | ||
5334 | /* Finish up dynamic symbol handling. We set the contents of various | |
5335 | dynamic sections here. */ | |
5336 | ||
b34976b6 | 5337 | static bfd_boolean |
351f65ca L |
5338 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
5339 | struct bfd_link_info *info, | |
5340 | struct elf_link_hash_entry *h, | |
220cf809 | 5341 | Elf_Internal_Sym *sym ATTRIBUTE_UNUSED) |
70256ad8 | 5342 | { |
351f65ca | 5343 | struct elf_x86_64_link_hash_table *htab; |
0ff2b86e L |
5344 | const struct elf_x86_64_backend_data *abed; |
5345 | bfd_boolean use_plt_bnd; | |
dd7e64d4 | 5346 | struct elf_x86_64_link_hash_entry *eh; |
70256ad8 | 5347 | |
351f65ca | 5348 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
5349 | if (htab == NULL) |
5350 | return FALSE; | |
70256ad8 | 5351 | |
0ff2b86e L |
5352 | /* Use MPX backend data in case of BND relocation. Use .plt_bnd |
5353 | section only if there is .plt section. */ | |
5354 | use_plt_bnd = htab->elf.splt != NULL && htab->plt_bnd != NULL; | |
5355 | abed = (use_plt_bnd | |
5356 | ? &elf_x86_64_bnd_arch_bed | |
5357 | : get_elf_x86_64_backend_data (output_bfd)); | |
5358 | ||
dd7e64d4 L |
5359 | eh = (struct elf_x86_64_link_hash_entry *) h; |
5360 | ||
70256ad8 AJ |
5361 | if (h->plt.offset != (bfd_vma) -1) |
5362 | { | |
70256ad8 | 5363 | bfd_vma plt_index; |
0ff2b86e L |
5364 | bfd_vma got_offset, plt_offset, plt_plt_offset, plt_got_offset; |
5365 | bfd_vma plt_plt_insn_end, plt_got_insn_size; | |
70256ad8 | 5366 | Elf_Internal_Rela rela; |
947216bf | 5367 | bfd_byte *loc; |
0ff2b86e | 5368 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 5369 | const struct elf_backend_data *bed; |
5974eba6 | 5370 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
5371 | |
5372 | /* When building a static executable, use .iplt, .igot.plt and | |
5373 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 5374 | if (htab->elf.splt != NULL) |
cbe950e9 | 5375 | { |
6de2ae4a L |
5376 | plt = htab->elf.splt; |
5377 | gotplt = htab->elf.sgotplt; | |
5378 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
5379 | } |
5380 | else | |
5381 | { | |
6de2ae4a L |
5382 | plt = htab->elf.iplt; |
5383 | gotplt = htab->elf.igotplt; | |
5384 | relplt = htab->elf.irelplt; | |
cbe950e9 | 5385 | } |
70256ad8 AJ |
5386 | |
5387 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 5388 | it up. */ |
cbe950e9 | 5389 | if ((h->dynindx == -1 |
0e1862bb | 5390 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
5391 | && h->def_regular |
5392 | && h->type == STT_GNU_IFUNC)) | |
5393 | || plt == NULL | |
5394 | || gotplt == NULL | |
5395 | || relplt == NULL) | |
cec7f46a | 5396 | abort (); |
70256ad8 AJ |
5397 | |
5398 | /* Get the index in the procedure linkage table which | |
5399 | corresponds to this symbol. This is the index of this symbol | |
5400 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 5401 | first entry in the procedure linkage table is reserved. |
6bbec505 | 5402 | |
cbe950e9 | 5403 | Get the offset into the .got table of the entry that |
407443a3 | 5404 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
5405 | bytes. The first three are reserved for the dynamic linker. |
5406 | ||
5407 | For static executables, we don't reserve anything. */ | |
5408 | ||
6de2ae4a | 5409 | if (plt == htab->elf.splt) |
cbe950e9 | 5410 | { |
eed180f8 | 5411 | got_offset = h->plt.offset / abed->plt_entry_size - 1; |
e1f98742 | 5412 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
5413 | } |
5414 | else | |
5415 | { | |
eed180f8 | 5416 | got_offset = h->plt.offset / abed->plt_entry_size; |
e1f98742 | 5417 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 5418 | } |
70256ad8 | 5419 | |
0ff2b86e L |
5420 | plt_plt_insn_end = abed->plt_plt_insn_end; |
5421 | plt_plt_offset = abed->plt_plt_offset; | |
5422 | plt_got_insn_size = abed->plt_got_insn_size; | |
5423 | plt_got_offset = abed->plt_got_offset; | |
5424 | if (use_plt_bnd) | |
5425 | { | |
5426 | /* Use the second PLT with BND relocations. */ | |
5427 | const bfd_byte *plt_entry, *plt2_entry; | |
0ff2b86e L |
5428 | |
5429 | if (eh->has_bnd_reloc) | |
5430 | { | |
5431 | plt_entry = elf_x86_64_bnd_plt_entry; | |
5432 | plt2_entry = elf_x86_64_bnd_plt2_entry; | |
5433 | } | |
5434 | else | |
5435 | { | |
5436 | plt_entry = elf_x86_64_legacy_plt_entry; | |
5437 | plt2_entry = elf_x86_64_legacy_plt2_entry; | |
5438 | ||
5439 | /* Subtract 1 since there is no BND prefix. */ | |
5440 | plt_plt_insn_end -= 1; | |
5441 | plt_plt_offset -= 1; | |
5442 | plt_got_insn_size -= 1; | |
5443 | plt_got_offset -= 1; | |
5444 | } | |
5445 | ||
5446 | BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry) | |
5447 | == sizeof (elf_x86_64_legacy_plt_entry)); | |
5448 | ||
5449 | /* Fill in the entry in the procedure linkage table. */ | |
5450 | memcpy (plt->contents + h->plt.offset, | |
5451 | plt_entry, sizeof (elf_x86_64_legacy_plt_entry)); | |
5452 | /* Fill in the entry in the second PLT. */ | |
5453 | memcpy (htab->plt_bnd->contents + eh->plt_bnd.offset, | |
5454 | plt2_entry, sizeof (elf_x86_64_legacy_plt2_entry)); | |
5455 | ||
5456 | resolved_plt = htab->plt_bnd; | |
5457 | plt_offset = eh->plt_bnd.offset; | |
5458 | } | |
5459 | else | |
5460 | { | |
5461 | /* Fill in the entry in the procedure linkage table. */ | |
5462 | memcpy (plt->contents + h->plt.offset, abed->plt_entry, | |
5463 | abed->plt_entry_size); | |
5464 | ||
5465 | resolved_plt = plt; | |
5466 | plt_offset = h->plt.offset; | |
5467 | } | |
eed180f8 RM |
5468 | |
5469 | /* Insert the relocation positions of the plt section. */ | |
5470 | ||
5471 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
5472 | subtracting the size of that instruction. */ | |
ab7fede8 L |
5473 | plt_got_pcrel_offset = (gotplt->output_section->vma |
5474 | + gotplt->output_offset | |
5475 | + got_offset | |
5476 | - resolved_plt->output_section->vma | |
5477 | - resolved_plt->output_offset | |
5478 | - plt_offset | |
5479 | - plt_got_insn_size); | |
5480 | ||
5481 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 5482 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
ab7fede8 L |
5483 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"), |
5484 | output_bfd, h->root.root.string); | |
5485 | ||
5486 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
0ff2b86e | 5487 | resolved_plt->contents + plt_offset + plt_got_offset); |
cbe950e9 | 5488 | |
653165cc | 5489 | /* Fill in the entry in the global offset table, initially this |
eed180f8 | 5490 | points to the second part of the PLT entry. */ |
cbe950e9 L |
5491 | bfd_put_64 (output_bfd, (plt->output_section->vma |
5492 | + plt->output_offset | |
eed180f8 | 5493 | + h->plt.offset + abed->plt_lazy_offset), |
cbe950e9 | 5494 | gotplt->contents + got_offset); |
70256ad8 AJ |
5495 | |
5496 | /* Fill in the entry in the .rela.plt section. */ | |
cbe950e9 L |
5497 | rela.r_offset = (gotplt->output_section->vma |
5498 | + gotplt->output_offset | |
70256ad8 | 5499 | + got_offset); |
cbe950e9 | 5500 | if (h->dynindx == -1 |
0e1862bb | 5501 | || ((bfd_link_executable (info) |
cbe950e9 L |
5502 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
5503 | && h->def_regular | |
5504 | && h->type == STT_GNU_IFUNC)) | |
5505 | { | |
5506 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
5507 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
351f65ca | 5508 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
cbe950e9 L |
5509 | rela.r_addend = (h->root.u.def.value |
5510 | + h->root.u.def.section->output_section->vma | |
5511 | + h->root.u.def.section->output_offset); | |
e1f98742 L |
5512 | /* R_X86_64_IRELATIVE comes last. */ |
5513 | plt_index = htab->next_irelative_index--; | |
cbe950e9 L |
5514 | } |
5515 | else | |
5516 | { | |
351f65ca | 5517 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); |
cbe950e9 | 5518 | rela.r_addend = 0; |
e1f98742 L |
5519 | plt_index = htab->next_jump_slot_index++; |
5520 | } | |
5521 | ||
5522 | /* Don't fill PLT entry for static executables. */ | |
5523 | if (plt == htab->elf.splt) | |
5524 | { | |
35a14c6b L |
5525 | bfd_vma plt0_offset = h->plt.offset + plt_plt_insn_end; |
5526 | ||
e1f98742 L |
5527 | /* Put relocation index. */ |
5528 | bfd_put_32 (output_bfd, plt_index, | |
eed180f8 | 5529 | plt->contents + h->plt.offset + abed->plt_reloc_offset); |
35a14c6b L |
5530 | |
5531 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
5532 | check relocation index for overflow since branch displacement | |
5533 | will overflow first. */ | |
5534 | if (plt0_offset > 0x80000000) | |
5535 | info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"), | |
5536 | output_bfd, h->root.root.string); | |
5537 | bfd_put_32 (output_bfd, - plt0_offset, | |
0ff2b86e | 5538 | plt->contents + h->plt.offset + plt_plt_offset); |
cbe950e9 | 5539 | } |
351f65ca L |
5540 | |
5541 | bed = get_elf_backend_data (output_bfd); | |
5542 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
82e96e07 | 5543 | bed->s->swap_reloca_out (output_bfd, &rela, loc); |
dd7e64d4 L |
5544 | } |
5545 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
5546 | { | |
5547 | bfd_vma got_offset, plt_offset, plt_got_offset, plt_got_insn_size; | |
5548 | asection *plt, *got; | |
5549 | bfd_boolean got_after_plt; | |
5550 | int32_t got_pcrel_offset; | |
5551 | const bfd_byte *got_plt_entry; | |
5552 | ||
5553 | /* Set the entry in the GOT procedure linkage table. */ | |
5554 | plt = htab->plt_got; | |
5555 | got = htab->elf.sgot; | |
5556 | got_offset = h->got.offset; | |
5557 | ||
5558 | if (got_offset == (bfd_vma) -1 | |
5559 | || h->type == STT_GNU_IFUNC | |
5560 | || plt == NULL | |
5561 | || got == NULL) | |
5562 | abort (); | |
70256ad8 | 5563 | |
dd7e64d4 L |
5564 | /* Use the second PLT entry template for the GOT PLT since they |
5565 | are the identical. */ | |
5566 | plt_got_insn_size = elf_x86_64_bnd_arch_bed.plt_got_insn_size; | |
5567 | plt_got_offset = elf_x86_64_bnd_arch_bed.plt_got_offset; | |
5568 | if (eh->has_bnd_reloc) | |
5569 | got_plt_entry = elf_x86_64_bnd_plt2_entry; | |
5570 | else | |
70256ad8 | 5571 | { |
dd7e64d4 L |
5572 | got_plt_entry = elf_x86_64_legacy_plt2_entry; |
5573 | ||
5574 | /* Subtract 1 since there is no BND prefix. */ | |
5575 | plt_got_insn_size -= 1; | |
5576 | plt_got_offset -= 1; | |
70256ad8 | 5577 | } |
dd7e64d4 L |
5578 | |
5579 | /* Fill in the entry in the GOT procedure linkage table. */ | |
5580 | plt_offset = eh->plt_got.offset; | |
5581 | memcpy (plt->contents + plt_offset, | |
5582 | got_plt_entry, sizeof (elf_x86_64_legacy_plt2_entry)); | |
5583 | ||
5584 | /* Put offset the PC-relative instruction referring to the GOT | |
5585 | entry, subtracting the size of that instruction. */ | |
5586 | got_pcrel_offset = (got->output_section->vma | |
5587 | + got->output_offset | |
5588 | + got_offset | |
5589 | - plt->output_section->vma | |
5590 | - plt->output_offset | |
5591 | - plt_offset | |
5592 | - plt_got_insn_size); | |
5593 | ||
5594 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
5595 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
5596 | if ((got_after_plt && got_pcrel_offset < 0) | |
5597 | || (!got_after_plt && got_pcrel_offset > 0)) | |
5598 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"), | |
5599 | output_bfd, h->root.root.string); | |
5600 | ||
5601 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
5602 | plt->contents + plt_offset + plt_got_offset); | |
5603 | } | |
5604 | ||
5605 | if (!h->def_regular | |
5606 | && (h->plt.offset != (bfd_vma) -1 | |
5607 | || eh->plt_got.offset != (bfd_vma) -1)) | |
5608 | { | |
5609 | /* Mark the symbol as undefined, rather than as defined in | |
5610 | the .plt section. Leave the value if there were any | |
5611 | relocations where pointer equality matters (this is a clue | |
5612 | for the dynamic linker, to make function pointer | |
5613 | comparisons work between an application and shared | |
5614 | library), otherwise set it to zero. If a function is only | |
5615 | called from a binary, there is no need to slow down | |
5616 | shared libraries because of that. */ | |
5617 | sym->st_shndx = SHN_UNDEF; | |
5618 | if (!h->pointer_equality_needed) | |
5619 | sym->st_value = 0; | |
70256ad8 AJ |
5620 | } |
5621 | ||
bffbf940 | 5622 | if (h->got.offset != (bfd_vma) -1 |
351f65ca L |
5623 | && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type) |
5624 | && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE) | |
053579d7 | 5625 | { |
053579d7 AJ |
5626 | Elf_Internal_Rela rela; |
5627 | ||
5628 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 5629 | up. */ |
6de2ae4a | 5630 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 5631 | abort (); |
053579d7 | 5632 | |
6de2ae4a L |
5633 | rela.r_offset = (htab->elf.sgot->output_section->vma |
5634 | + htab->elf.sgot->output_offset | |
dc810e39 | 5635 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
5636 | |
5637 | /* If this is a static link, or it is a -Bsymbolic link and the | |
5638 | symbol is defined locally or was forced to be local because | |
5639 | of a version file, we just want to emit a RELATIVE reloc. | |
5640 | The entry in the global offset table will already have been | |
5641 | initialized in the relocate_section function. */ | |
710ab287 | 5642 | if (h->def_regular |
0018b0a3 L |
5643 | && h->type == STT_GNU_IFUNC) |
5644 | { | |
0e1862bb | 5645 | if (bfd_link_pic (info)) |
710ab287 L |
5646 | { |
5647 | /* Generate R_X86_64_GLOB_DAT. */ | |
5648 | goto do_glob_dat; | |
5649 | } | |
5650 | else | |
5651 | { | |
90d60710 L |
5652 | asection *plt; |
5653 | ||
710ab287 L |
5654 | if (!h->pointer_equality_needed) |
5655 | abort (); | |
5656 | ||
5657 | /* For non-shared object, we can't use .got.plt, which | |
5658 | contains the real function addres if we need pointer | |
5659 | equality. We load the GOT entry with the PLT entry. */ | |
90d60710 | 5660 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
5661 | bfd_put_64 (output_bfd, (plt->output_section->vma |
5662 | + plt->output_offset | |
5663 | + h->plt.offset), | |
6de2ae4a | 5664 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
5665 | return TRUE; |
5666 | } | |
0018b0a3 | 5667 | } |
0e1862bb | 5668 | else if (bfd_link_pic (info) |
0018b0a3 | 5669 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
053579d7 | 5670 | { |
41bed6dd L |
5671 | if (!h->def_regular) |
5672 | return FALSE; | |
cc78d0af | 5673 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 5674 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
5675 | rela.r_addend = (h->root.u.def.value |
5676 | + h->root.u.def.section->output_section->vma | |
5677 | + h->root.u.def.section->output_offset); | |
5678 | } | |
5679 | else | |
5680 | { | |
5681 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 5682 | do_glob_dat: |
c434dee6 | 5683 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 5684 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 5685 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
5686 | rela.r_addend = 0; |
5687 | } | |
5688 | ||
351f65ca | 5689 | elf_append_rela (output_bfd, htab->elf.srelgot, &rela); |
053579d7 AJ |
5690 | } |
5691 | ||
f5385ebf | 5692 | if (h->needs_copy) |
70256ad8 | 5693 | { |
70256ad8 AJ |
5694 | Elf_Internal_Rela rela; |
5695 | ||
5696 | /* This symbol needs a copy reloc. Set it up. */ | |
5697 | ||
c434dee6 AJ |
5698 | if (h->dynindx == -1 |
5699 | || (h->root.type != bfd_link_hash_defined | |
5700 | && h->root.type != bfd_link_hash_defweak) | |
5701 | || htab->srelbss == NULL) | |
5702 | abort (); | |
70256ad8 AJ |
5703 | |
5704 | rela.r_offset = (h->root.u.def.value | |
5705 | + h->root.u.def.section->output_section->vma | |
5706 | + h->root.u.def.section->output_offset); | |
351f65ca | 5707 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 5708 | rela.r_addend = 0; |
351f65ca | 5709 | elf_append_rela (output_bfd, htab->srelbss, &rela); |
70256ad8 AJ |
5710 | } |
5711 | ||
b34976b6 | 5712 | return TRUE; |
70256ad8 AJ |
5713 | } |
5714 | ||
c25bc9fc L |
5715 | /* Finish up local dynamic symbol handling. We set the contents of |
5716 | various dynamic sections here. */ | |
5717 | ||
5718 | static bfd_boolean | |
351f65ca | 5719 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
5720 | { |
5721 | struct elf_link_hash_entry *h | |
5722 | = (struct elf_link_hash_entry *) *slot; | |
5723 | struct bfd_link_info *info | |
eed180f8 | 5724 | = (struct bfd_link_info *) inf; |
c25bc9fc | 5725 | |
351f65ca | 5726 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
c25bc9fc L |
5727 | info, h, NULL); |
5728 | } | |
5729 | ||
c434dee6 AJ |
5730 | /* Used to decide how to sort relocs in an optimal manner for the |
5731 | dynamic linker, before writing them out. */ | |
5732 | ||
5733 | static enum elf_reloc_type_class | |
cae1fbbb | 5734 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
5735 | const asection *rel_sec ATTRIBUTE_UNUSED, |
5736 | const Elf_Internal_Rela *rela) | |
c434dee6 | 5737 | { |
cae1fbbb L |
5738 | bfd *abfd = info->output_bfd; |
5739 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
5740 | struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info); | |
cae1fbbb | 5741 | |
d9e3b590 L |
5742 | if (htab->elf.dynsym != NULL |
5743 | && htab->elf.dynsym->contents != NULL) | |
5744 | { | |
5745 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
5746 | dynamic symbols. */ | |
5747 | unsigned long r_symndx = htab->r_sym (rela->r_info); | |
5748 | Elf_Internal_Sym sym; | |
5749 | if (!bed->s->swap_symbol_in (abfd, | |
5750 | (htab->elf.dynsym->contents | |
5751 | + r_symndx * bed->s->sizeof_sym), | |
5752 | 0, &sym)) | |
5753 | abort (); | |
5754 | ||
5755 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) | |
5756 | return reloc_class_ifunc; | |
5757 | } | |
cae1fbbb | 5758 | |
351f65ca | 5759 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 AJ |
5760 | { |
5761 | case R_X86_64_RELATIVE: | |
1da80baa | 5762 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
5763 | return reloc_class_relative; |
5764 | case R_X86_64_JUMP_SLOT: | |
5765 | return reloc_class_plt; | |
5766 | case R_X86_64_COPY: | |
5767 | return reloc_class_copy; | |
5768 | default: | |
5769 | return reloc_class_normal; | |
5770 | } | |
5771 | } | |
5772 | ||
70256ad8 AJ |
5773 | /* Finish up the dynamic sections. */ |
5774 | ||
b34976b6 | 5775 | static bfd_boolean |
351f65ca L |
5776 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
5777 | struct bfd_link_info *info) | |
70256ad8 | 5778 | { |
351f65ca | 5779 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
5780 | bfd *dynobj; |
5781 | asection *sdyn; | |
0ff2b86e | 5782 | const struct elf_x86_64_backend_data *abed; |
70256ad8 | 5783 | |
351f65ca | 5784 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
5785 | if (htab == NULL) |
5786 | return FALSE; | |
5787 | ||
0ff2b86e L |
5788 | /* Use MPX backend data in case of BND relocation. Use .plt_bnd |
5789 | section only if there is .plt section. */ | |
5790 | abed = (htab->elf.splt != NULL && htab->plt_bnd != NULL | |
5791 | ? &elf_x86_64_bnd_arch_bed | |
5792 | : get_elf_x86_64_backend_data (output_bfd)); | |
5793 | ||
c434dee6 | 5794 | dynobj = htab->elf.dynobj; |
3d4d4302 | 5795 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
70256ad8 | 5796 | |
c434dee6 | 5797 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 5798 | { |
82e96e07 L |
5799 | bfd_byte *dyncon, *dynconend; |
5800 | const struct elf_backend_data *bed; | |
5801 | bfd_size_type sizeof_dyn; | |
70256ad8 | 5802 | |
6de2ae4a | 5803 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 5804 | abort (); |
70256ad8 | 5805 | |
82e96e07 L |
5806 | bed = get_elf_backend_data (dynobj); |
5807 | sizeof_dyn = bed->s->sizeof_dyn; | |
5808 | dyncon = sdyn->contents; | |
5809 | dynconend = sdyn->contents + sdyn->size; | |
5810 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
5811 | { |
5812 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
5813 | asection *s; |
5814 | ||
82e96e07 | 5815 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
5816 | |
5817 | switch (dyn.d_tag) | |
5818 | { | |
5819 | default: | |
053579d7 | 5820 | continue; |
70256ad8 AJ |
5821 | |
5822 | case DT_PLTGOT: | |
6de2ae4a | 5823 | s = htab->elf.sgotplt; |
8c37241b | 5824 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 5825 | break; |
70256ad8 AJ |
5826 | |
5827 | case DT_JMPREL: | |
6de2ae4a | 5828 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 5829 | break; |
70256ad8 | 5830 | |
c434dee6 | 5831 | case DT_PLTRELSZ: |
6de2ae4a | 5832 | s = htab->elf.srelplt->output_section; |
eea6121a | 5833 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
5834 | break; |
5835 | ||
5836 | case DT_RELASZ: | |
c434dee6 AJ |
5837 | /* The procedure linkage table relocs (DT_JMPREL) should |
5838 | not be included in the overall relocs (DT_RELA). | |
5839 | Therefore, we override the DT_RELASZ entry here to | |
5840 | make it not include the JMPREL relocs. Since the | |
5841 | linker script arranges for .rela.plt to follow all | |
5842 | other relocation sections, we don't have to worry | |
5843 | about changing the DT_RELA entry. */ | |
6de2ae4a | 5844 | if (htab->elf.srelplt != NULL) |
70256ad8 | 5845 | { |
6de2ae4a | 5846 | s = htab->elf.srelplt->output_section; |
eea6121a | 5847 | dyn.d_un.d_val -= s->size; |
70256ad8 AJ |
5848 | } |
5849 | break; | |
67a4f2b7 AO |
5850 | |
5851 | case DT_TLSDESC_PLT: | |
6de2ae4a | 5852 | s = htab->elf.splt; |
67a4f2b7 AO |
5853 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
5854 | + htab->tlsdesc_plt; | |
5855 | break; | |
5856 | ||
5857 | case DT_TLSDESC_GOT: | |
6de2ae4a | 5858 | s = htab->elf.sgot; |
67a4f2b7 AO |
5859 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
5860 | + htab->tlsdesc_got; | |
5861 | break; | |
70256ad8 | 5862 | } |
c434dee6 | 5863 | |
82e96e07 | 5864 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
5865 | } |
5866 | ||
c434dee6 | 5867 | /* Fill in the special first entry in the procedure linkage table. */ |
6de2ae4a | 5868 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 5869 | { |
653165cc | 5870 | /* Fill in the first entry in the procedure linkage table. */ |
eed180f8 RM |
5871 | memcpy (htab->elf.splt->contents, |
5872 | abed->plt0_entry, abed->plt_entry_size); | |
653165cc AJ |
5873 | /* Add offset for pushq GOT+8(%rip), since the instruction |
5874 | uses 6 bytes subtract this value. */ | |
5875 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
5876 | (htab->elf.sgotplt->output_section->vma |
5877 | + htab->elf.sgotplt->output_offset | |
653165cc | 5878 | + 8 |
6de2ae4a L |
5879 | - htab->elf.splt->output_section->vma |
5880 | - htab->elf.splt->output_offset | |
653165cc | 5881 | - 6), |
eed180f8 RM |
5882 | htab->elf.splt->contents + abed->plt0_got1_offset); |
5883 | /* Add offset for the PC-relative instruction accessing GOT+16, | |
5884 | subtracting the offset to the end of that instruction. */ | |
653165cc | 5885 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5886 | (htab->elf.sgotplt->output_section->vma |
5887 | + htab->elf.sgotplt->output_offset | |
653165cc | 5888 | + 16 |
6de2ae4a L |
5889 | - htab->elf.splt->output_section->vma |
5890 | - htab->elf.splt->output_offset | |
eed180f8 RM |
5891 | - abed->plt0_got2_insn_end), |
5892 | htab->elf.splt->contents + abed->plt0_got2_offset); | |
653165cc | 5893 | |
eed180f8 RM |
5894 | elf_section_data (htab->elf.splt->output_section) |
5895 | ->this_hdr.sh_entsize = abed->plt_entry_size; | |
67a4f2b7 AO |
5896 | |
5897 | if (htab->tlsdesc_plt) | |
5898 | { | |
5899 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6de2ae4a | 5900 | htab->elf.sgot->contents + htab->tlsdesc_got); |
67a4f2b7 | 5901 | |
6de2ae4a | 5902 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, |
eed180f8 | 5903 | abed->plt0_entry, abed->plt_entry_size); |
67a4f2b7 AO |
5904 | |
5905 | /* Add offset for pushq GOT+8(%rip), since the | |
5906 | instruction uses 6 bytes subtract this value. */ | |
5907 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
5908 | (htab->elf.sgotplt->output_section->vma |
5909 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 5910 | + 8 |
6de2ae4a L |
5911 | - htab->elf.splt->output_section->vma |
5912 | - htab->elf.splt->output_offset | |
67a4f2b7 AO |
5913 | - htab->tlsdesc_plt |
5914 | - 6), | |
eed180f8 RM |
5915 | htab->elf.splt->contents |
5916 | + htab->tlsdesc_plt + abed->plt0_got1_offset); | |
5917 | /* Add offset for the PC-relative instruction accessing GOT+TDG, | |
5918 | where TGD stands for htab->tlsdesc_got, subtracting the offset | |
5919 | to the end of that instruction. */ | |
67a4f2b7 | 5920 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5921 | (htab->elf.sgot->output_section->vma |
5922 | + htab->elf.sgot->output_offset | |
67a4f2b7 | 5923 | + htab->tlsdesc_got |
6de2ae4a L |
5924 | - htab->elf.splt->output_section->vma |
5925 | - htab->elf.splt->output_offset | |
67a4f2b7 | 5926 | - htab->tlsdesc_plt |
eed180f8 RM |
5927 | - abed->plt0_got2_insn_end), |
5928 | htab->elf.splt->contents | |
5929 | + htab->tlsdesc_plt + abed->plt0_got2_offset); | |
67a4f2b7 | 5930 | } |
70256ad8 | 5931 | } |
70256ad8 AJ |
5932 | } |
5933 | ||
0ff2b86e L |
5934 | if (htab->plt_bnd != NULL) |
5935 | elf_section_data (htab->plt_bnd->output_section) | |
5936 | ->this_hdr.sh_entsize = sizeof (elf_x86_64_bnd_plt2_entry); | |
5937 | ||
6de2ae4a | 5938 | if (htab->elf.sgotplt) |
70256ad8 | 5939 | { |
56d4289c L |
5940 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
5941 | { | |
5942 | (*_bfd_error_handler) | |
5943 | (_("discarded output section: `%A'"), htab->elf.sgotplt); | |
5944 | return FALSE; | |
5945 | } | |
5946 | ||
c434dee6 | 5947 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 5948 | if (htab->elf.sgotplt->size > 0) |
c434dee6 AJ |
5949 | { |
5950 | /* Set the first entry in the global offset table to the address of | |
5951 | the dynamic section. */ | |
5952 | if (sdyn == NULL) | |
6de2ae4a | 5953 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); |
c434dee6 AJ |
5954 | else |
5955 | bfd_put_64 (output_bfd, | |
5956 | sdyn->output_section->vma + sdyn->output_offset, | |
6de2ae4a | 5957 | htab->elf.sgotplt->contents); |
c434dee6 | 5958 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
6de2ae4a L |
5959 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); |
5960 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
c434dee6 | 5961 | } |
70256ad8 | 5962 | |
6de2ae4a | 5963 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = |
c434dee6 AJ |
5964 | GOT_ENTRY_SIZE; |
5965 | } | |
70256ad8 | 5966 | |
e41b3a13 | 5967 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
5968 | if (htab->plt_eh_frame != NULL |
5969 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
5970 | { |
5971 | if (htab->elf.splt != NULL | |
5972 | && htab->elf.splt->size != 0 | |
5973 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
5974 | && htab->elf.splt->output_section != NULL | |
5975 | && htab->plt_eh_frame->output_section != NULL) | |
5976 | { | |
5977 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
5978 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
5979 | + htab->plt_eh_frame->output_offset | |
5980 | + PLT_FDE_START_OFFSET; | |
5981 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5982 | htab->plt_eh_frame->contents | |
5983 | + PLT_FDE_START_OFFSET); | |
5984 | } | |
dbaa2011 | 5985 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
5986 | { |
5987 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5988 | htab->plt_eh_frame, | |
5989 | htab->plt_eh_frame->contents)) | |
5990 | return FALSE; | |
5991 | } | |
5992 | } | |
5993 | ||
6de2ae4a L |
5994 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
5995 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
5996 | = GOT_ENTRY_SIZE; |
5997 | ||
c25bc9fc L |
5998 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
5999 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 6000 | elf_x86_64_finish_local_dynamic_symbol, |
c25bc9fc L |
6001 | info); |
6002 | ||
b34976b6 | 6003 | return TRUE; |
8d88c4ca NC |
6004 | } |
6005 | ||
3972882e | 6006 | /* Return an array of PLT entry symbol values. */ |
4c45e5c9 | 6007 | |
3972882e L |
6008 | static bfd_vma * |
6009 | elf_x86_64_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt, | |
6010 | asection *relplt) | |
4c45e5c9 | 6011 | { |
3972882e L |
6012 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
6013 | arelent *p; | |
6014 | long count, i; | |
6015 | bfd_vma *plt_sym_val; | |
144bed8d | 6016 | bfd_vma plt_offset; |
3972882e L |
6017 | bfd_byte *plt_contents; |
6018 | const struct elf_x86_64_backend_data *bed; | |
6019 | Elf_Internal_Shdr *hdr; | |
6020 | asection *plt_bnd; | |
144bed8d | 6021 | |
3972882e L |
6022 | /* Get the .plt section contents. PLT passed down may point to the |
6023 | .plt.bnd section. Make sure that PLT always points to the .plt | |
6024 | section. */ | |
6025 | plt_bnd = bfd_get_section_by_name (abfd, ".plt.bnd"); | |
6026 | if (plt_bnd) | |
6027 | { | |
6028 | if (plt != plt_bnd) | |
6029 | abort (); | |
6030 | plt = bfd_get_section_by_name (abfd, ".plt"); | |
6031 | if (plt == NULL) | |
6032 | abort (); | |
6033 | bed = &elf_x86_64_bnd_arch_bed; | |
6034 | } | |
6035 | else | |
6036 | bed = get_elf_x86_64_backend_data (abfd); | |
cca5b8b6 | 6037 | |
3972882e L |
6038 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); |
6039 | if (plt_contents == NULL) | |
6040 | return NULL; | |
6041 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
6042 | plt_contents, 0, plt->size)) | |
144bed8d | 6043 | { |
3972882e L |
6044 | bad_return: |
6045 | free (plt_contents); | |
6046 | return NULL; | |
144bed8d L |
6047 | } |
6048 | ||
3972882e L |
6049 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
6050 | if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) | |
6051 | goto bad_return; | |
144bed8d | 6052 | |
3972882e L |
6053 | hdr = &elf_section_data (relplt)->this_hdr; |
6054 | count = relplt->size / hdr->sh_entsize; | |
144bed8d | 6055 | |
3972882e L |
6056 | plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count); |
6057 | if (plt_sym_val == NULL) | |
6058 | goto bad_return; | |
cca5b8b6 | 6059 | |
35181b3e | 6060 | for (i = 0; i < count; i++) |
3972882e | 6061 | plt_sym_val[i] = -1; |
cca5b8b6 | 6062 | |
3972882e L |
6063 | plt_offset = bed->plt_entry_size; |
6064 | p = relplt->relocation; | |
6065 | for (i = 0; i < count; i++, p++) | |
144bed8d | 6066 | { |
3972882e | 6067 | long reloc_index; |
144bed8d | 6068 | |
6f25f223 | 6069 | /* Skip unknown relocation. */ |
533d0af0 | 6070 | if (p->howto == NULL) |
6f25f223 | 6071 | continue; |
533d0af0 | 6072 | |
3972882e L |
6073 | if (p->howto->type != R_X86_64_JUMP_SLOT |
6074 | && p->howto->type != R_X86_64_IRELATIVE) | |
6075 | continue; | |
144bed8d | 6076 | |
3972882e L |
6077 | reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset |
6078 | + bed->plt_reloc_offset)); | |
ec1f73bb | 6079 | if (reloc_index < count) |
144bed8d | 6080 | { |
ec1f73bb AM |
6081 | if (plt_bnd) |
6082 | { | |
6083 | /* This is the index in .plt section. */ | |
6084 | long plt_index = plt_offset / bed->plt_entry_size; | |
6085 | /* Store VMA + the offset in .plt.bnd section. */ | |
6086 | plt_sym_val[reloc_index] = | |
6087 | (plt_bnd->vma | |
6088 | + (plt_index - 1) * sizeof (elf_x86_64_legacy_plt2_entry)); | |
6089 | } | |
6090 | else | |
6091 | plt_sym_val[reloc_index] = plt->vma + plt_offset; | |
144bed8d L |
6092 | } |
6093 | plt_offset += bed->plt_entry_size; | |
fca6ae69 L |
6094 | |
6095 | /* PR binutils/18437: Skip extra relocations in the .rela.plt | |
6096 | section. */ | |
6097 | if (plt_offset >= plt->size) | |
6098 | break; | |
144bed8d L |
6099 | } |
6100 | ||
3972882e L |
6101 | free (plt_contents); |
6102 | ||
6103 | return plt_sym_val; | |
4c45e5c9 | 6104 | } |
8df9fc9d | 6105 | |
0ff2b86e L |
6106 | /* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section |
6107 | support. */ | |
6108 | ||
6109 | static long | |
6110 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
6111 | long symcount, | |
6112 | asymbol **syms, | |
6113 | long dynsymcount, | |
6114 | asymbol **dynsyms, | |
6115 | asymbol **ret) | |
6116 | { | |
3972882e L |
6117 | /* Pass the .plt.bnd section to _bfd_elf_ifunc_get_synthetic_symtab |
6118 | as PLT if it exists. */ | |
6119 | asection *plt = bfd_get_section_by_name (abfd, ".plt.bnd"); | |
0ff2b86e | 6120 | if (plt == NULL) |
3972882e L |
6121 | plt = bfd_get_section_by_name (abfd, ".plt"); |
6122 | return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms, | |
6123 | dynsymcount, dynsyms, ret, | |
6124 | plt, | |
6125 | elf_x86_64_get_plt_sym_val); | |
0ff2b86e L |
6126 | } |
6127 | ||
d2b2c203 DJ |
6128 | /* Handle an x86-64 specific section when reading an object file. This |
6129 | is called when elfcode.h finds a section with an unknown type. */ | |
6130 | ||
6131 | static bfd_boolean | |
0c723101 L |
6132 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
6133 | const char *name, int shindex) | |
d2b2c203 DJ |
6134 | { |
6135 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
6136 | return FALSE; | |
6137 | ||
6dc132d9 | 6138 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
6139 | return FALSE; |
6140 | ||
6141 | return TRUE; | |
6142 | } | |
6143 | ||
3b22753a L |
6144 | /* Hook called by the linker routine which adds symbols from an object |
6145 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
6146 | of .bss. */ | |
6147 | ||
6148 | static bfd_boolean | |
351f65ca L |
6149 | elf_x86_64_add_symbol_hook (bfd *abfd, |
6150 | struct bfd_link_info *info, | |
6151 | Elf_Internal_Sym *sym, | |
6152 | const char **namep ATTRIBUTE_UNUSED, | |
6153 | flagword *flagsp ATTRIBUTE_UNUSED, | |
6154 | asection **secp, | |
6155 | bfd_vma *valp) | |
3b22753a L |
6156 | { |
6157 | asection *lcomm; | |
6158 | ||
6159 | switch (sym->st_shndx) | |
6160 | { | |
6161 | case SHN_X86_64_LCOMMON: | |
6162 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
6163 | if (lcomm == NULL) | |
6164 | { | |
6165 | lcomm = bfd_make_section_with_flags (abfd, | |
6166 | "LARGE_COMMON", | |
6167 | (SEC_ALLOC | |
6168 | | SEC_IS_COMMON | |
6169 | | SEC_LINKER_CREATED)); | |
6170 | if (lcomm == NULL) | |
6171 | return FALSE; | |
6172 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
6173 | } | |
6174 | *secp = lcomm; | |
6175 | *valp = sym->st_size; | |
c35bdf6e | 6176 | return TRUE; |
3b22753a | 6177 | } |
d8045f23 | 6178 | |
13a2df29 | 6179 | if (ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE |
f1885d1e AM |
6180 | && (abfd->flags & DYNAMIC) == 0 |
6181 | && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) | |
13a2df29 L |
6182 | elf_tdata (info->output_bfd)->has_gnu_symbols |
6183 | |= elf_gnu_symbol_unique; | |
d8045f23 | 6184 | |
3b22753a L |
6185 | return TRUE; |
6186 | } | |
6187 | ||
6188 | ||
6189 | /* Given a BFD section, try to locate the corresponding ELF section | |
6190 | index. */ | |
6191 | ||
6192 | static bfd_boolean | |
351f65ca L |
6193 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
6194 | asection *sec, int *index_return) | |
3b22753a L |
6195 | { |
6196 | if (sec == &_bfd_elf_large_com_section) | |
6197 | { | |
91d6fa6a | 6198 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
6199 | return TRUE; |
6200 | } | |
6201 | return FALSE; | |
6202 | } | |
6203 | ||
6204 | /* Process a symbol. */ | |
6205 | ||
6206 | static void | |
351f65ca L |
6207 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
6208 | asymbol *asym) | |
3b22753a L |
6209 | { |
6210 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
6211 | ||
6212 | switch (elfsym->internal_elf_sym.st_shndx) | |
6213 | { | |
6214 | case SHN_X86_64_LCOMMON: | |
6215 | asym->section = &_bfd_elf_large_com_section; | |
6216 | asym->value = elfsym->internal_elf_sym.st_size; | |
6217 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
6218 | asym->flags &= ~BSF_GLOBAL; | |
6219 | break; | |
6220 | } | |
6221 | } | |
6222 | ||
6223 | static bfd_boolean | |
351f65ca | 6224 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
6225 | { |
6226 | return (sym->st_shndx == SHN_COMMON | |
6227 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
6228 | } | |
6229 | ||
6230 | static unsigned int | |
351f65ca | 6231 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
6232 | { |
6233 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
6234 | return SHN_COMMON; | |
6235 | else | |
6236 | return SHN_X86_64_LCOMMON; | |
6237 | } | |
6238 | ||
6239 | static asection * | |
351f65ca | 6240 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
6241 | { |
6242 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
6243 | return bfd_com_section_ptr; | |
6244 | else | |
6245 | return &_bfd_elf_large_com_section; | |
6246 | } | |
6247 | ||
6248 | static bfd_boolean | |
5d13b3b3 AM |
6249 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
6250 | const Elf_Internal_Sym *sym, | |
351f65ca | 6251 | asection **psec, |
5d13b3b3 AM |
6252 | bfd_boolean newdef, |
6253 | bfd_boolean olddef, | |
351f65ca | 6254 | bfd *oldbfd, |
5d13b3b3 | 6255 | const asection *oldsec) |
3b22753a L |
6256 | { |
6257 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
6258 | normal common symbol. We turn the large common symbol into a |
6259 | normal one. */ | |
5d13b3b3 | 6260 | if (!olddef |
3b22753a | 6261 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
6262 | && !newdef |
6263 | && bfd_is_com_section (*psec) | |
6264 | && oldsec != *psec) | |
3b22753a | 6265 | { |
00492999 | 6266 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 6267 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
6268 | { |
6269 | h->root.u.c.p->section | |
6270 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
6271 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
6272 | } | |
6273 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
6274 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
6275 | *psec = bfd_com_section_ptr; | |
3b22753a L |
6276 | } |
6277 | ||
6278 | return TRUE; | |
6279 | } | |
6280 | ||
6281 | static int | |
351f65ca L |
6282 | elf_x86_64_additional_program_headers (bfd *abfd, |
6283 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
6284 | { |
6285 | asection *s; | |
9a2e389a | 6286 | int count = 0; |
3b22753a L |
6287 | |
6288 | /* Check to see if we need a large readonly segment. */ | |
6289 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
6290 | if (s && (s->flags & SEC_LOAD)) | |
6291 | count++; | |
6292 | ||
6293 | /* Check to see if we need a large data segment. Since .lbss sections | |
6294 | is placed right after the .bss section, there should be no need for | |
6295 | a large data segment just because of .lbss. */ | |
6296 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
6297 | if (s && (s->flags & SEC_LOAD)) | |
6298 | count++; | |
6299 | ||
6300 | return count; | |
6301 | } | |
6302 | ||
fdc90cb4 JJ |
6303 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
6304 | ||
6305 | static bfd_boolean | |
351f65ca | 6306 | elf_x86_64_hash_symbol (struct elf_link_hash_entry *h) |
fdc90cb4 JJ |
6307 | { |
6308 | if (h->plt.offset != (bfd_vma) -1 | |
6309 | && !h->def_regular | |
6310 | && !h->pointer_equality_needed) | |
6311 | return FALSE; | |
6312 | ||
6313 | return _bfd_elf_hash_symbol (h); | |
6314 | } | |
6315 | ||
c543bf9a L |
6316 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
6317 | ||
6318 | static bfd_boolean | |
6319 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
6320 | const bfd_target *output) | |
6321 | { | |
6322 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
6323 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
6324 | && _bfd_elf_relocs_compatible (input, output)); | |
6325 | } | |
6326 | ||
9a2e389a | 6327 | static const struct bfd_elf_special_section |
351f65ca | 6328 | elf_x86_64_special_sections[]= |
3b22753a | 6329 | { |
0112cd26 NC |
6330 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
6331 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
6332 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
6333 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
6334 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
6335 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
6336 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
6337 | }; |
6338 | ||
6d00b590 | 6339 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
6340 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
6341 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 6342 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 6343 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 6344 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 6345 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 6346 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
6347 | |
6348 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 6349 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
6350 | #define elf_backend_want_got_plt 1 |
6351 | #define elf_backend_plt_readonly 1 | |
6352 | #define elf_backend_want_plt_sym 0 | |
6353 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 6354 | #define elf_backend_rela_normal 1 |
e41b3a13 | 6355 | #define elf_backend_plt_alignment 4 |
f7483970 | 6356 | #define elf_backend_extern_protected_data 1 |
70256ad8 | 6357 | |
351f65ca | 6358 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 6359 | |
70256ad8 | 6360 | #define bfd_elf64_bfd_link_hash_table_create \ |
351f65ca | 6361 | elf_x86_64_link_hash_table_create |
351f65ca | 6362 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 6363 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 6364 | elf_x86_64_reloc_name_lookup |
70256ad8 | 6365 | |
351f65ca | 6366 | #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol |
c543bf9a | 6367 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca L |
6368 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
6369 | #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol | |
6370 | #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections | |
6371 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections | |
6372 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
6373 | #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook | |
6374 | #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook | |
6375 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus | |
6376 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
6377 | #ifdef CORE_HEADER |
6378 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
6379 | #endif | |
351f65ca L |
6380 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
6381 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
6382 | #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections | |
6383 | #define elf_backend_always_size_sections elf_x86_64_always_size_sections | |
74541ad4 | 6384 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 6385 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
351f65ca | 6386 | #define bfd_elf64_mkobject elf_x86_64_mkobject |
0ff2b86e | 6387 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 6388 | |
d2b2c203 | 6389 | #define elf_backend_section_from_shdr \ |
351f65ca | 6390 | elf_x86_64_section_from_shdr |
d2b2c203 | 6391 | |
3b22753a | 6392 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 6393 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 6394 | #define elf_backend_add_symbol_hook \ |
351f65ca | 6395 | elf_x86_64_add_symbol_hook |
3b22753a | 6396 | #define elf_backend_symbol_processing \ |
351f65ca | 6397 | elf_x86_64_symbol_processing |
3b22753a | 6398 | #define elf_backend_common_section_index \ |
351f65ca | 6399 | elf_x86_64_common_section_index |
3b22753a | 6400 | #define elf_backend_common_section \ |
351f65ca | 6401 | elf_x86_64_common_section |
3b22753a | 6402 | #define elf_backend_common_definition \ |
351f65ca | 6403 | elf_x86_64_common_definition |
3b22753a | 6404 | #define elf_backend_merge_symbol \ |
351f65ca | 6405 | elf_x86_64_merge_symbol |
3b22753a | 6406 | #define elf_backend_special_sections \ |
351f65ca | 6407 | elf_x86_64_special_sections |
3b22753a | 6408 | #define elf_backend_additional_program_headers \ |
351f65ca | 6409 | elf_x86_64_additional_program_headers |
fdc90cb4 | 6410 | #define elf_backend_hash_symbol \ |
351f65ca | 6411 | elf_x86_64_hash_symbol |
8f79b794 L |
6412 | #define elf_backend_omit_section_dynsym \ |
6413 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
3b22753a | 6414 | |
8d88c4ca | 6415 | #include "elf64-target.h" |
9d7cbccd | 6416 | |
6036f486 ES |
6417 | /* CloudABI support. */ |
6418 | ||
6419 | #undef TARGET_LITTLE_SYM | |
6420 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec | |
6421 | #undef TARGET_LITTLE_NAME | |
6422 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" | |
6423 | ||
6424 | #undef ELF_OSABI | |
6425 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
6426 | ||
6427 | #undef elf64_bed | |
6428 | #define elf64_bed elf64_x86_64_cloudabi_bed | |
6429 | ||
6430 | #include "elf64-target.h" | |
6431 | ||
9d7cbccd NC |
6432 | /* FreeBSD support. */ |
6433 | ||
6434 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6435 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
9d7cbccd NC |
6436 | #undef TARGET_LITTLE_NAME |
6437 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
6438 | ||
d1036acb L |
6439 | #undef ELF_OSABI |
6440 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 6441 | |
9d7cbccd NC |
6442 | #undef elf64_bed |
6443 | #define elf64_bed elf64_x86_64_fbsd_bed | |
6444 | ||
6445 | #include "elf64-target.h" | |
8a9036a4 | 6446 | |
a6cc6b3b RO |
6447 | /* Solaris 2 support. */ |
6448 | ||
6449 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6450 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
6451 | #undef TARGET_LITTLE_NAME |
6452 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
6453 | ||
6454 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
6455 | objects won't be recognized. */ | |
6456 | #undef ELF_OSABI | |
6457 | ||
6458 | #undef elf64_bed | |
6459 | #define elf64_bed elf64_x86_64_sol2_bed | |
6460 | ||
7dc98aea RO |
6461 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
6462 | boundary. */ | |
6463 | #undef elf_backend_static_tls_alignment | |
6464 | #define elf_backend_static_tls_alignment 16 | |
6465 | ||
a6cc6b3b RO |
6466 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
6467 | ||
6468 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
6469 | File, p.63. */ | |
6470 | #undef elf_backend_want_plt_sym | |
6471 | #define elf_backend_want_plt_sym 1 | |
6472 | ||
6473 | #include "elf64-target.h" | |
6474 | ||
8059fb19 RM |
6475 | /* Native Client support. */ |
6476 | ||
64b384e1 RM |
6477 | static bfd_boolean |
6478 | elf64_x86_64_nacl_elf_object_p (bfd *abfd) | |
6479 | { | |
6480 | /* Set the right machine number for a NaCl x86-64 ELF64 file. */ | |
6481 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl); | |
6482 | return TRUE; | |
6483 | } | |
6484 | ||
8059fb19 | 6485 | #undef TARGET_LITTLE_SYM |
6d00b590 | 6486 | #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec |
8059fb19 RM |
6487 | #undef TARGET_LITTLE_NAME |
6488 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
6489 | #undef elf64_bed | |
6490 | #define elf64_bed elf64_x86_64_nacl_bed | |
6491 | ||
6492 | #undef ELF_MAXPAGESIZE | |
6493 | #undef ELF_MINPAGESIZE | |
6494 | #undef ELF_COMMONPAGESIZE | |
6495 | #define ELF_MAXPAGESIZE 0x10000 | |
6496 | #define ELF_MINPAGESIZE 0x10000 | |
6497 | #define ELF_COMMONPAGESIZE 0x10000 | |
6498 | ||
6499 | /* Restore defaults. */ | |
6500 | #undef ELF_OSABI | |
6501 | #undef elf_backend_static_tls_alignment | |
6502 | #undef elf_backend_want_plt_sym | |
6503 | #define elf_backend_want_plt_sym 0 | |
6504 | ||
6505 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
6506 | ||
6507 | #undef elf_backend_plt_alignment | |
6508 | #define elf_backend_plt_alignment 5 | |
6509 | #define NACL_PLT_ENTRY_SIZE 64 | |
6510 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
6511 | ||
6512 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
6513 | { | |
6514 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
6515 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ | |
6516 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
6517 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
6518 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
6519 | ||
ea2d813e | 6520 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
70cc877f | 6521 | 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */ |
ea2d813e RM |
6522 | |
6523 | /* 32 bytes of nop to pad out to the standard size. */ | |
8059fb19 RM |
6524 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ |
6525 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
6526 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
6527 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
ea2d813e RM |
6528 | 0x66, /* excess data32 prefix */ |
6529 | 0x90 /* nop */ | |
8059fb19 RM |
6530 | }; |
6531 | ||
6532 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6533 | { | |
6534 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
6535 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
6536 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
6537 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
6538 | ||
6539 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
6540 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
6541 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
6542 | ||
6543 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6544 | 0x68, /* pushq immediate */ | |
6545 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
6546 | 0xe9, /* jmp relative */ | |
6547 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
6548 | ||
6549 | /* 22 bytes of nop to pad out to the standard size. */ | |
6550 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
6551 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
6552 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ | |
6553 | }; | |
6554 | ||
6555 | /* .eh_frame covering the .plt section. */ | |
6556 | ||
6557 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
6558 | { | |
6559 | #if (PLT_CIE_LENGTH != 20 \ | |
6560 | || PLT_FDE_LENGTH != 36 \ | |
6561 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
6562 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
6563 | # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!" | |
6564 | #endif | |
6565 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
6566 | 0, 0, 0, 0, /* CIE ID */ | |
6567 | 1, /* CIE version */ | |
6568 | 'z', 'R', 0, /* Augmentation string */ | |
6569 | 1, /* Code alignment factor */ | |
6570 | 0x78, /* Data alignment factor */ | |
6571 | 16, /* Return address column */ | |
6572 | 1, /* Augmentation size */ | |
6573 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
6574 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
6575 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
6576 | DW_CFA_nop, DW_CFA_nop, | |
6577 | ||
6578 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
6579 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
6580 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
6581 | 0, 0, 0, 0, /* .plt size goes here */ | |
6582 | 0, /* Augmentation size */ | |
6583 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
6584 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
6585 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
6586 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
6587 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
6588 | 13, /* Block length */ | |
6589 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
6590 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
6591 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
6592 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
6593 | DW_CFA_nop, DW_CFA_nop | |
6594 | }; | |
6595 | ||
6596 | static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed = | |
6597 | { | |
6598 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ | |
6599 | elf_x86_64_nacl_plt_entry, /* plt_entry */ | |
6600 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
6601 | 2, /* plt0_got1_offset */ | |
6602 | 9, /* plt0_got2_offset */ | |
6603 | 13, /* plt0_got2_insn_end */ | |
6604 | 3, /* plt_got_offset */ | |
6605 | 33, /* plt_reloc_offset */ | |
6606 | 38, /* plt_plt_offset */ | |
6607 | 7, /* plt_got_insn_size */ | |
6608 | 42, /* plt_plt_insn_end */ | |
6609 | 32, /* plt_lazy_offset */ | |
6610 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ | |
6611 | sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */ | |
6612 | }; | |
6613 | ||
6614 | #undef elf_backend_arch_data | |
6615 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
6616 | ||
64b384e1 RM |
6617 | #undef elf_backend_object_p |
6618 | #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p | |
5a68afcf RM |
6619 | #undef elf_backend_modify_segment_map |
6620 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
6621 | #undef elf_backend_modify_program_headers | |
6622 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
6623 | #undef elf_backend_final_write_processing |
6624 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 6625 | |
8059fb19 RM |
6626 | #include "elf64-target.h" |
6627 | ||
6628 | /* Native Client x32 support. */ | |
6629 | ||
64b384e1 RM |
6630 | static bfd_boolean |
6631 | elf32_x86_64_nacl_elf_object_p (bfd *abfd) | |
6632 | { | |
6633 | /* Set the right machine number for a NaCl x86-64 ELF32 file. */ | |
6634 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl); | |
6635 | return TRUE; | |
6636 | } | |
6637 | ||
8059fb19 | 6638 | #undef TARGET_LITTLE_SYM |
6d00b590 | 6639 | #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec |
8059fb19 RM |
6640 | #undef TARGET_LITTLE_NAME |
6641 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" | |
6642 | #undef elf32_bed | |
6643 | #define elf32_bed elf32_x86_64_nacl_bed | |
6644 | ||
6645 | #define bfd_elf32_bfd_link_hash_table_create \ | |
6646 | elf_x86_64_link_hash_table_create | |
8059fb19 RM |
6647 | #define bfd_elf32_bfd_reloc_type_lookup \ |
6648 | elf_x86_64_reloc_type_lookup | |
6649 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
6650 | elf_x86_64_reloc_name_lookup | |
6651 | #define bfd_elf32_mkobject \ | |
6652 | elf_x86_64_mkobject | |
b7365e5d L |
6653 | #define bfd_elf32_get_synthetic_symtab \ |
6654 | elf_x86_64_get_synthetic_symtab | |
8059fb19 RM |
6655 | |
6656 | #undef elf_backend_object_p | |
6657 | #define elf_backend_object_p \ | |
64b384e1 | 6658 | elf32_x86_64_nacl_elf_object_p |
8059fb19 RM |
6659 | |
6660 | #undef elf_backend_bfd_from_remote_memory | |
6661 | #define elf_backend_bfd_from_remote_memory \ | |
6662 | _bfd_elf32_bfd_from_remote_memory | |
6663 | ||
6664 | #undef elf_backend_size_info | |
6665 | #define elf_backend_size_info \ | |
6666 | _bfd_elf32_size_info | |
6667 | ||
6668 | #include "elf32-target.h" | |
6669 | ||
6670 | /* Restore defaults. */ | |
5a68afcf | 6671 | #undef elf_backend_object_p |
8059fb19 | 6672 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
6673 | #undef elf_backend_bfd_from_remote_memory |
6674 | #undef elf_backend_size_info | |
6675 | #undef elf_backend_modify_segment_map | |
6676 | #undef elf_backend_modify_program_headers | |
887badb3 | 6677 | #undef elf_backend_final_write_processing |
8059fb19 | 6678 | |
8a9036a4 L |
6679 | /* Intel L1OM support. */ |
6680 | ||
6681 | static bfd_boolean | |
6682 | elf64_l1om_elf_object_p (bfd *abfd) | |
6683 | { | |
6684 | /* Set the right machine number for an L1OM elf64 file. */ | |
6685 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
6686 | return TRUE; | |
6687 | } | |
6688 | ||
6689 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6690 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
6691 | #undef TARGET_LITTLE_NAME |
6692 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
6693 | #undef ELF_ARCH | |
6694 | #define ELF_ARCH bfd_arch_l1om | |
6695 | ||
6696 | #undef ELF_MACHINE_CODE | |
6697 | #define ELF_MACHINE_CODE EM_L1OM | |
6698 | ||
6699 | #undef ELF_OSABI | |
6700 | ||
6701 | #undef elf64_bed | |
6702 | #define elf64_bed elf64_l1om_bed | |
6703 | ||
6704 | #undef elf_backend_object_p | |
6705 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
6706 | ||
8059fb19 RM |
6707 | /* Restore defaults. */ |
6708 | #undef ELF_MAXPAGESIZE | |
6709 | #undef ELF_MINPAGESIZE | |
6710 | #undef ELF_COMMONPAGESIZE | |
6711 | #define ELF_MAXPAGESIZE 0x200000 | |
6712 | #define ELF_MINPAGESIZE 0x1000 | |
6713 | #define ELF_COMMONPAGESIZE 0x1000 | |
6714 | #undef elf_backend_plt_alignment | |
6715 | #define elf_backend_plt_alignment 4 | |
6716 | #undef elf_backend_arch_data | |
6717 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 6718 | |
8a9036a4 L |
6719 | #include "elf64-target.h" |
6720 | ||
6721 | /* FreeBSD L1OM support. */ | |
6722 | ||
6723 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6724 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
6725 | #undef TARGET_LITTLE_NAME |
6726 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
6727 | ||
6728 | #undef ELF_OSABI | |
6729 | #define ELF_OSABI ELFOSABI_FREEBSD | |
6730 | ||
6731 | #undef elf64_bed | |
6732 | #define elf64_bed elf64_l1om_fbsd_bed | |
6733 | ||
8a9036a4 | 6734 | #include "elf64-target.h" |
351f65ca | 6735 | |
7a9068fe L |
6736 | /* Intel K1OM support. */ |
6737 | ||
6738 | static bfd_boolean | |
6739 | elf64_k1om_elf_object_p (bfd *abfd) | |
6740 | { | |
6741 | /* Set the right machine number for an K1OM elf64 file. */ | |
6742 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
6743 | return TRUE; | |
6744 | } | |
6745 | ||
6746 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6747 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
6748 | #undef TARGET_LITTLE_NAME |
6749 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
6750 | #undef ELF_ARCH | |
6751 | #define ELF_ARCH bfd_arch_k1om | |
6752 | ||
6753 | #undef ELF_MACHINE_CODE | |
6754 | #define ELF_MACHINE_CODE EM_K1OM | |
6755 | ||
6756 | #undef ELF_OSABI | |
6757 | ||
6758 | #undef elf64_bed | |
6759 | #define elf64_bed elf64_k1om_bed | |
6760 | ||
6761 | #undef elf_backend_object_p | |
6762 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
6763 | ||
6764 | #undef elf_backend_static_tls_alignment | |
6765 | ||
6766 | #undef elf_backend_want_plt_sym | |
6767 | #define elf_backend_want_plt_sym 0 | |
6768 | ||
6769 | #include "elf64-target.h" | |
6770 | ||
6771 | /* FreeBSD K1OM support. */ | |
6772 | ||
6773 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6774 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
6775 | #undef TARGET_LITTLE_NAME |
6776 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
6777 | ||
6778 | #undef ELF_OSABI | |
6779 | #define ELF_OSABI ELFOSABI_FREEBSD | |
6780 | ||
6781 | #undef elf64_bed | |
6782 | #define elf64_bed elf64_k1om_fbsd_bed | |
6783 | ||
6784 | #include "elf64-target.h" | |
6785 | ||
351f65ca L |
6786 | /* 32bit x86-64 support. */ |
6787 | ||
351f65ca | 6788 | #undef TARGET_LITTLE_SYM |
6d00b590 | 6789 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
6790 | #undef TARGET_LITTLE_NAME |
6791 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 6792 | #undef elf32_bed |
351f65ca L |
6793 | |
6794 | #undef ELF_ARCH | |
6795 | #define ELF_ARCH bfd_arch_i386 | |
6796 | ||
6797 | #undef ELF_MACHINE_CODE | |
6798 | #define ELF_MACHINE_CODE EM_X86_64 | |
6799 | ||
351f65ca L |
6800 | #undef ELF_OSABI |
6801 | ||
351f65ca L |
6802 | #undef elf_backend_object_p |
6803 | #define elf_backend_object_p \ | |
6804 | elf32_x86_64_elf_object_p | |
6805 | ||
6806 | #undef elf_backend_bfd_from_remote_memory | |
6807 | #define elf_backend_bfd_from_remote_memory \ | |
6808 | _bfd_elf32_bfd_from_remote_memory | |
6809 | ||
6810 | #undef elf_backend_size_info | |
6811 | #define elf_backend_size_info \ | |
6812 | _bfd_elf32_size_info | |
6813 | ||
6814 | #include "elf32-target.h" |