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351f65ca | 1 | /* X86-64 specific support for ELF |
2571583a | 2 | Copyright (C) 2000-2017 Free Software Foundation, Inc. |
8d88c4ca NC |
3 | Contributed by Jan Hubicka <jh@suse.cz>. |
4 | ||
ae9a127f | 5 | This file is part of BFD, the Binary File Descriptor library. |
8d88c4ca | 6 | |
ae9a127f NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
ae9a127f | 10 | (at your option) any later version. |
8d88c4ca | 11 | |
ae9a127f NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
8d88c4ca | 16 | |
ae9a127f NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
8d88c4ca | 21 | |
0afcef53 | 22 | #include "elfxx-x86.h" |
5a68afcf | 23 | #include "elf-nacl.h" |
e41b3a13 | 24 | #include "dwarf2.h" |
d7921315 | 25 | #include "libiberty.h" |
8d88c4ca | 26 | |
56ceb5b5 | 27 | #include "opcode/i386.h" |
8d88c4ca NC |
28 | #include "elf/x86-64.h" |
29 | ||
8fd79e71 L |
30 | #ifdef CORE_HEADER |
31 | #include <stdarg.h> | |
32 | #include CORE_HEADER | |
33 | #endif | |
34 | ||
8d88c4ca NC |
35 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
36 | #define MINUS_ONE (~ (bfd_vma) 0) | |
37 | ||
351f65ca L |
38 | /* Since both 32-bit and 64-bit x86-64 encode relocation type in the |
39 | identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get | |
40 | relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE | |
41 | since they are the same. */ | |
42 | ||
8d88c4ca | 43 | /* The relocation "howto" table. Order of fields: |
7b81dfbb AJ |
44 | type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow, |
45 | special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */ | |
70256ad8 AJ |
46 | static reloc_howto_type x86_64_elf_howto_table[] = |
47 | { | |
6346d5ca | 48 | HOWTO(R_X86_64_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont, |
b34976b6 AM |
49 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, |
50 | FALSE), | |
51 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
52 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, | |
53 | FALSE), | |
54 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
55 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, | |
56 | TRUE), | |
57 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
58 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, | |
59 | FALSE), | |
60 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
61 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, | |
62 | TRUE), | |
63 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
64 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, | |
65 | FALSE), | |
66 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
67 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, | |
68 | MINUS_ONE, FALSE), | |
69 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
70 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, | |
71 | MINUS_ONE, FALSE), | |
72 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
73 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, | |
74 | MINUS_ONE, FALSE), | |
75 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
76 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, | |
77 | 0xffffffff, TRUE), | |
78 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, | |
79 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
80 | FALSE), | |
81 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
82 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, | |
83 | FALSE), | |
84 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
85 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), | |
b0360d8c | 86 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
b34976b6 | 87 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), |
ac2aa337 | 88 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
b34976b6 AM |
89 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), |
90 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
91 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), | |
92 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
93 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, | |
94 | MINUS_ONE, FALSE), | |
95 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
96 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, | |
97 | MINUS_ONE, FALSE), | |
98 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
99 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, | |
100 | MINUS_ONE, FALSE), | |
101 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
102 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, | |
103 | 0xffffffff, TRUE), | |
104 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
105 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, | |
106 | 0xffffffff, TRUE), | |
ac2aa337 | 107 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
b34976b6 AM |
108 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, |
109 | 0xffffffff, FALSE), | |
110 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
111 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, | |
112 | 0xffffffff, TRUE), | |
113 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
114 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, | |
115 | 0xffffffff, FALSE), | |
d6ab8113 JB |
116 | HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
117 | bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE, | |
118 | TRUE), | |
119 | HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
120 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", | |
121 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
122 | HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
123 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", | |
124 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
7b81dfbb AJ |
125 | HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, |
126 | bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE, | |
127 | FALSE), | |
128 | HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
129 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE, | |
130 | MINUS_ONE, TRUE), | |
131 | HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
132 | bfd_elf_generic_reloc, "R_X86_64_GOTPC64", | |
133 | FALSE, MINUS_ONE, MINUS_ONE, TRUE), | |
134 | HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
135 | bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE, | |
136 | MINUS_ONE, FALSE), | |
137 | HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
138 | bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE, | |
139 | MINUS_ONE, FALSE), | |
1788fc08 L |
140 | HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, |
141 | bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff, | |
142 | FALSE), | |
143 | HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned, | |
144 | bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE, | |
145 | FALSE), | |
67a4f2b7 AO |
146 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0, |
147 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
148 | "R_X86_64_GOTPC32_TLSDESC", | |
149 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
150 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0, | |
151 | complain_overflow_dont, bfd_elf_generic_reloc, | |
152 | "R_X86_64_TLSDESC_CALL", | |
153 | FALSE, 0, 0, FALSE), | |
154 | HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0, | |
155 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
156 | "R_X86_64_TLSDESC", | |
157 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
cbe950e9 L |
158 | HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
159 | bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE, | |
160 | MINUS_ONE, FALSE), | |
64d25c44 L |
161 | HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
162 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE, | |
163 | MINUS_ONE, FALSE), | |
c3320543 L |
164 | HOWTO(R_X86_64_PC32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
165 | bfd_elf_generic_reloc, "R_X86_64_PC32_BND", FALSE, 0xffffffff, 0xffffffff, | |
166 | TRUE), | |
167 | HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
168 | bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", FALSE, 0xffffffff, 0xffffffff, | |
169 | TRUE), | |
56ceb5b5 L |
170 | HOWTO(R_X86_64_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
171 | bfd_elf_generic_reloc, "R_X86_64_GOTPCRELX", FALSE, 0xffffffff, | |
172 | 0xffffffff, TRUE), | |
173 | HOWTO(R_X86_64_REX_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
174 | bfd_elf_generic_reloc, "R_X86_64_REX_GOTPCRELX", FALSE, 0xffffffff, | |
175 | 0xffffffff, TRUE), | |
fe4770f4 | 176 | |
a33d77bc JB |
177 | /* We have a gap in the reloc numbers here. |
178 | R_X86_64_standard counts the number up to this point, and | |
179 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
180 | R_X86_64_GNU_VT* to form an index into this table. */ | |
56ceb5b5 | 181 | #define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1) |
a33d77bc JB |
182 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
183 | ||
fe4770f4 | 184 | /* GNU extension to record C++ vtable hierarchy. */ |
b34976b6 AM |
185 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
186 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
187 | |
188 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
189 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
190 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
d7921315 L |
191 | FALSE), |
192 | ||
193 | /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */ | |
194 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
195 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
196 | FALSE) | |
8d88c4ca NC |
197 | }; |
198 | ||
d8045f23 NC |
199 | #define IS_X86_64_PCREL_TYPE(TYPE) \ |
200 | ( ((TYPE) == R_X86_64_PC8) \ | |
201 | || ((TYPE) == R_X86_64_PC16) \ | |
202 | || ((TYPE) == R_X86_64_PC32) \ | |
c3320543 | 203 | || ((TYPE) == R_X86_64_PC32_BND) \ |
d8045f23 NC |
204 | || ((TYPE) == R_X86_64_PC64)) |
205 | ||
8d88c4ca | 206 | /* Map BFD relocs to the x86_64 elf relocs. */ |
70256ad8 AJ |
207 | struct elf_reloc_map |
208 | { | |
8d88c4ca NC |
209 | bfd_reloc_code_real_type bfd_reloc_val; |
210 | unsigned char elf_reloc_val; | |
211 | }; | |
212 | ||
dc810e39 | 213 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 214 | { |
70256ad8 AJ |
215 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
216 | { BFD_RELOC_64, R_X86_64_64, }, | |
217 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
218 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
219 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
220 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
221 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
222 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
223 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
224 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
225 | { BFD_RELOC_32, R_X86_64_32, }, | |
226 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
227 | { BFD_RELOC_16, R_X86_64_16, }, | |
228 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
229 | { BFD_RELOC_8, R_X86_64_8, }, | |
230 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
231 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
232 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
233 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
234 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
235 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
236 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
237 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
238 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
239 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
240 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
241 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
242 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
243 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
244 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
245 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
246 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
1788fc08 L |
247 | { BFD_RELOC_SIZE32, R_X86_64_SIZE32, }, |
248 | { BFD_RELOC_SIZE64, R_X86_64_SIZE64, }, | |
67a4f2b7 AO |
249 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
250 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
251 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
cbe950e9 | 252 | { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, }, |
56ceb5b5 L |
253 | { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND, }, |
254 | { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND, }, | |
255 | { BFD_RELOC_X86_64_GOTPCRELX, R_X86_64_GOTPCRELX, }, | |
256 | { BFD_RELOC_X86_64_REX_GOTPCRELX, R_X86_64_REX_GOTPCRELX, }, | |
fe4770f4 AJ |
257 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
258 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
259 | }; |
260 | ||
67a4f2b7 | 261 | static reloc_howto_type * |
351f65ca | 262 | elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) |
67a4f2b7 AO |
263 | { |
264 | unsigned i; | |
265 | ||
d7921315 L |
266 | if (r_type == (unsigned int) R_X86_64_32) |
267 | { | |
268 | if (ABI_64_P (abfd)) | |
269 | i = r_type; | |
270 | else | |
271 | i = ARRAY_SIZE (x86_64_elf_howto_table) - 1; | |
272 | } | |
273 | else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
274 | || r_type >= (unsigned int) R_X86_64_max) | |
67a4f2b7 AO |
275 | { |
276 | if (r_type >= (unsigned int) R_X86_64_standard) | |
277 | { | |
695344c0 | 278 | /* xgettext:c-format */ |
4eca0228 AM |
279 | _bfd_error_handler (_("%B: invalid relocation type %d"), |
280 | abfd, (int) r_type); | |
67a4f2b7 AO |
281 | r_type = R_X86_64_NONE; |
282 | } | |
283 | i = r_type; | |
284 | } | |
285 | else | |
286 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
287 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
288 | return &x86_64_elf_howto_table[i]; | |
289 | } | |
8d88c4ca NC |
290 | |
291 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
292 | static reloc_howto_type * | |
351f65ca L |
293 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
294 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
295 | { |
296 | unsigned int i; | |
27482721 | 297 | |
8d88c4ca NC |
298 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
299 | i++) | |
300 | { | |
301 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
302 | return elf_x86_64_rtype_to_howto (abfd, |
303 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca | 304 | } |
5860e3f8 | 305 | return NULL; |
8d88c4ca NC |
306 | } |
307 | ||
157090f7 | 308 | static reloc_howto_type * |
d7921315 | 309 | elf_x86_64_reloc_name_lookup (bfd *abfd, |
351f65ca | 310 | const char *r_name) |
157090f7 AM |
311 | { |
312 | unsigned int i; | |
313 | ||
d7921315 L |
314 | if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0) |
315 | { | |
316 | /* Get x32 R_X86_64_32. */ | |
317 | reloc_howto_type *reloc | |
318 | = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1]; | |
319 | BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32); | |
320 | return reloc; | |
321 | } | |
322 | ||
323 | for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++) | |
157090f7 AM |
324 | if (x86_64_elf_howto_table[i].name != NULL |
325 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
326 | return &x86_64_elf_howto_table[i]; | |
327 | ||
328 | return NULL; | |
329 | } | |
330 | ||
8d88c4ca | 331 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 332 | |
8d88c4ca | 333 | static void |
351f65ca L |
334 | elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
335 | Elf_Internal_Rela *dst) | |
8d88c4ca | 336 | { |
67a4f2b7 | 337 | unsigned r_type; |
8d88c4ca | 338 | |
351f65ca L |
339 | r_type = ELF32_R_TYPE (dst->r_info); |
340 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); | |
8d88c4ca NC |
341 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
342 | } | |
70256ad8 | 343 | \f |
3bab7989 | 344 | /* Support for core dump NOTE sections. */ |
b34976b6 | 345 | static bfd_boolean |
351f65ca | 346 | elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
347 | { |
348 | int offset; | |
eea6121a | 349 | size_t size; |
3bab7989 ML |
350 | |
351 | switch (note->descsz) | |
352 | { | |
353 | default: | |
b34976b6 | 354 | return FALSE; |
3bab7989 | 355 | |
bcd823f1 L |
356 | case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */ |
357 | /* pr_cursig */ | |
228e534f | 358 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
bcd823f1 L |
359 | |
360 | /* pr_pid */ | |
228e534f | 361 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
bcd823f1 L |
362 | |
363 | /* pr_reg */ | |
364 | offset = 72; | |
365 | size = 216; | |
366 | ||
367 | break; | |
368 | ||
3bab7989 ML |
369 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ |
370 | /* pr_cursig */ | |
228e534f | 371 | elf_tdata (abfd)->core->signal |
3bab7989 ML |
372 | = bfd_get_16 (abfd, note->descdata + 12); |
373 | ||
374 | /* pr_pid */ | |
228e534f | 375 | elf_tdata (abfd)->core->lwpid |
3bab7989 ML |
376 | = bfd_get_32 (abfd, note->descdata + 32); |
377 | ||
378 | /* pr_reg */ | |
379 | offset = 112; | |
eea6121a | 380 | size = 216; |
3bab7989 ML |
381 | |
382 | break; | |
383 | } | |
384 | ||
385 | /* Make a ".reg/999" section. */ | |
386 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 387 | size, note->descpos + offset); |
3bab7989 ML |
388 | } |
389 | ||
b34976b6 | 390 | static bfd_boolean |
351f65ca | 391 | elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
392 | { |
393 | switch (note->descsz) | |
394 | { | |
395 | default: | |
b34976b6 | 396 | return FALSE; |
3bab7989 | 397 | |
bcd823f1 | 398 | case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */ |
228e534f | 399 | elf_tdata (abfd)->core->pid |
bcd823f1 | 400 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 401 | elf_tdata (abfd)->core->program |
bcd823f1 | 402 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 403 | elf_tdata (abfd)->core->command |
bcd823f1 L |
404 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
405 | break; | |
406 | ||
3bab7989 | 407 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ |
228e534f | 408 | elf_tdata (abfd)->core->pid |
261b8d08 | 409 | = bfd_get_32 (abfd, note->descdata + 24); |
228e534f | 410 | elf_tdata (abfd)->core->program |
3bab7989 | 411 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
228e534f | 412 | elf_tdata (abfd)->core->command |
3bab7989 ML |
413 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
414 | } | |
415 | ||
416 | /* Note that for some reason, a spurious space is tacked | |
417 | onto the end of the args in some (at least one anyway) | |
418 | implementations, so strip it off if it exists. */ | |
419 | ||
420 | { | |
228e534f | 421 | char *command = elf_tdata (abfd)->core->command; |
3bab7989 ML |
422 | int n = strlen (command); |
423 | ||
424 | if (0 < n && command[n - 1] == ' ') | |
425 | command[n - 1] = '\0'; | |
426 | } | |
427 | ||
b34976b6 | 428 | return TRUE; |
3bab7989 | 429 | } |
8fd79e71 L |
430 | |
431 | #ifdef CORE_HEADER | |
432 | static char * | |
433 | elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz, | |
434 | int note_type, ...) | |
435 | { | |
436 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8fd79e71 L |
437 | va_list ap; |
438 | const char *fname, *psargs; | |
439 | long pid; | |
440 | int cursig; | |
441 | const void *gregs; | |
442 | ||
443 | switch (note_type) | |
444 | { | |
445 | default: | |
446 | return NULL; | |
447 | ||
448 | case NT_PRPSINFO: | |
449 | va_start (ap, note_type); | |
450 | fname = va_arg (ap, const char *); | |
451 | psargs = va_arg (ap, const char *); | |
452 | va_end (ap); | |
453 | ||
454 | if (bed->s->elfclass == ELFCLASS32) | |
455 | { | |
456 | prpsinfo32_t data; | |
457 | memset (&data, 0, sizeof (data)); | |
458 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
459 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
460 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
461 | &data, sizeof (data)); | |
8fd79e71 L |
462 | } |
463 | else | |
464 | { | |
b1bd052d | 465 | prpsinfo64_t data; |
8fd79e71 L |
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 | 471 | } |
e85c6a70 | 472 | /* NOTREACHED */ |
8fd79e71 L |
473 | |
474 | case NT_PRSTATUS: | |
475 | va_start (ap, note_type); | |
476 | pid = va_arg (ap, long); | |
477 | cursig = va_arg (ap, int); | |
478 | gregs = va_arg (ap, const void *); | |
479 | va_end (ap); | |
480 | ||
481 | if (bed->s->elfclass == ELFCLASS32) | |
482 | { | |
483 | if (bed->elf_machine_code == EM_X86_64) | |
484 | { | |
485 | prstatusx32_t prstat; | |
486 | memset (&prstat, 0, sizeof (prstat)); | |
487 | prstat.pr_pid = pid; | |
488 | prstat.pr_cursig = cursig; | |
489 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
490 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
491 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
492 | } |
493 | else | |
494 | { | |
495 | prstatus32_t prstat; | |
496 | memset (&prstat, 0, sizeof (prstat)); | |
497 | prstat.pr_pid = pid; | |
498 | prstat.pr_cursig = cursig; | |
499 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
500 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
501 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
502 | } |
503 | } | |
504 | else | |
505 | { | |
b1bd052d | 506 | prstatus64_t prstat; |
8fd79e71 L |
507 | memset (&prstat, 0, sizeof (prstat)); |
508 | prstat.pr_pid = pid; | |
509 | prstat.pr_cursig = cursig; | |
510 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
511 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
512 | &prstat, sizeof (prstat)); | |
8fd79e71 | 513 | } |
8fd79e71 | 514 | } |
e85c6a70 | 515 | /* NOTREACHED */ |
8fd79e71 L |
516 | } |
517 | #endif | |
3bab7989 | 518 | \f |
407443a3 | 519 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 520 | |
70256ad8 AJ |
521 | /* The size in bytes of an entry in the global offset table. */ |
522 | ||
523 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 524 | |
38b12349 | 525 | /* The size in bytes of an entry in the lazy procedure linkage table. */ |
8d88c4ca | 526 | |
38b12349 | 527 | #define LAZY_PLT_ENTRY_SIZE 16 |
70256ad8 | 528 | |
38b12349 L |
529 | /* The size in bytes of an entry in the non-lazy procedure linkage |
530 | table. */ | |
70256ad8 | 531 | |
38b12349 L |
532 | #define NON_LAZY_PLT_ENTRY_SIZE 8 |
533 | ||
534 | /* The first entry in a lazy procedure linkage table looks like this. | |
535 | See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this | |
536 | works. */ | |
537 | ||
538 | static const bfd_byte elf_x86_64_lazy_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
70256ad8 | 539 | { |
653165cc AJ |
540 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
541 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 542 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
543 | }; |
544 | ||
38b12349 | 545 | /* Subsequent entries in a lazy procedure linkage table look like this. */ |
70256ad8 | 546 | |
38b12349 | 547 | static const bfd_byte elf_x86_64_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
70256ad8 | 548 | { |
653165cc | 549 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 550 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 551 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
552 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
553 | 0xe9, /* jmp relative */ | |
554 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
555 | }; | |
556 | ||
38b12349 | 557 | /* The first entry in a lazy procedure linkage table with BND prefix |
0ff2b86e L |
558 | like this. */ |
559 | ||
38b12349 | 560 | static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e L |
561 | { |
562 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
563 | 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */ | |
564 | 0x0f, 0x1f, 0 /* nopl (%rax) */ | |
565 | }; | |
566 | ||
38b12349 L |
567 | /* Subsequent entries for branches with BND prefx in a lazy procedure |
568 | linkage table look like this. */ | |
0ff2b86e | 569 | |
38b12349 | 570 | static const bfd_byte elf_x86_64_lazy_bnd_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e L |
571 | { |
572 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
573 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
574 | 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */ | |
575 | }; | |
576 | ||
ee2fdd6f L |
577 | /* The first entry in the IBT-enabled lazy procedure linkage table is the |
578 | the same as the lazy PLT with BND prefix so that bound registers are | |
579 | preserved when control is passed to dynamic linker. Subsequent | |
580 | entries for a IBT-enabled lazy procedure linkage table look like | |
581 | this. */ | |
582 | ||
583 | static const bfd_byte elf_x86_64_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
584 | { | |
585 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
586 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
587 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
588 | 0x90 /* nop */ | |
589 | }; | |
590 | ||
591 | /* The first entry in the x32 IBT-enabled lazy procedure linkage table | |
de194d85 | 592 | is the same as the normal lazy PLT. Subsequent entries for an |
ee2fdd6f L |
593 | x32 IBT-enabled lazy procedure linkage table look like this. */ |
594 | ||
595 | static const bfd_byte elf_x32_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
596 | { | |
597 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
598 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
599 | 0xe9, 0, 0, 0, 0, /* jmpq relative */ | |
600 | 0x66, 0x90 /* xchg %ax,%ax */ | |
601 | }; | |
602 | ||
38b12349 | 603 | /* Entries in the non-lazey procedure linkage table look like this. */ |
0ff2b86e | 604 | |
38b12349 | 605 | static const bfd_byte elf_x86_64_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 606 | { |
38b12349 L |
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 */ | |
0ff2b86e L |
610 | }; |
611 | ||
38b12349 L |
612 | /* Entries for branches with BND prefix in the non-lazey procedure |
613 | linkage table look like this. */ | |
0ff2b86e | 614 | |
38b12349 | 615 | static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 616 | { |
38b12349 L |
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 */ | |
0ff2b86e L |
620 | }; |
621 | ||
ee2fdd6f L |
622 | /* Entries for branches with IBT-enabled in the non-lazey procedure |
623 | linkage table look like this. They have the same size as the lazy | |
624 | PLT entry. */ | |
625 | ||
626 | static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
627 | { | |
628 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
629 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ | |
630 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
631 | 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */ | |
632 | }; | |
633 | ||
634 | /* Entries for branches with IBT-enabled in the x32 non-lazey procedure | |
635 | linkage table look like this. They have the same size as the lazy | |
636 | PLT entry. */ | |
637 | ||
638 | static const bfd_byte elf_x32_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
639 | { | |
640 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
641 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ | |
642 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
643 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
644 | }; | |
645 | ||
38b12349 | 646 | /* .eh_frame covering the lazy .plt section. */ |
e41b3a13 | 647 | |
38b12349 | 648 | static const bfd_byte elf_x86_64_eh_frame_lazy_plt[] = |
e41b3a13 | 649 | { |
e41b3a13 JJ |
650 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ |
651 | 0, 0, 0, 0, /* CIE ID */ | |
652 | 1, /* CIE version */ | |
653 | 'z', 'R', 0, /* Augmentation string */ | |
654 | 1, /* Code alignment factor */ | |
655 | 0x78, /* Data alignment factor */ | |
656 | 16, /* Return address column */ | |
657 | 1, /* Augmentation size */ | |
658 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
659 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
660 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
661 | DW_CFA_nop, DW_CFA_nop, | |
662 | ||
663 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
664 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
665 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
666 | 0, 0, 0, 0, /* .plt size goes here */ | |
667 | 0, /* Augmentation size */ | |
668 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
669 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
670 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
671 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
672 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
673 | 11, /* Block length */ | |
674 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
675 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
676 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
677 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
678 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
679 | }; | |
680 | ||
38b12349 | 681 | /* .eh_frame covering the lazy BND .plt section. */ |
9e659176 | 682 | |
38b12349 | 683 | static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt[] = |
9e659176 L |
684 | { |
685 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
686 | 0, 0, 0, 0, /* CIE ID */ | |
687 | 1, /* CIE version */ | |
688 | 'z', 'R', 0, /* Augmentation string */ | |
689 | 1, /* Code alignment factor */ | |
690 | 0x78, /* Data alignment factor */ | |
691 | 16, /* Return address column */ | |
692 | 1, /* Augmentation size */ | |
693 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
694 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
695 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
696 | DW_CFA_nop, DW_CFA_nop, | |
697 | ||
698 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
699 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
700 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
701 | 0, 0, 0, 0, /* .plt size goes here */ | |
702 | 0, /* Augmentation size */ | |
703 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
704 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
705 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
706 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
707 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
708 | 11, /* Block length */ | |
709 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
710 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
711 | DW_OP_lit15, DW_OP_and, DW_OP_lit5, DW_OP_ge, | |
712 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
713 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
714 | }; | |
715 | ||
ee2fdd6f L |
716 | /* .eh_frame covering the lazy .plt section with IBT-enabled. */ |
717 | ||
718 | static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt[] = | |
719 | { | |
720 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
721 | 0, 0, 0, 0, /* CIE ID */ | |
722 | 1, /* CIE version */ | |
723 | 'z', 'R', 0, /* Augmentation string */ | |
724 | 1, /* Code alignment factor */ | |
725 | 0x78, /* Data alignment factor */ | |
726 | 16, /* Return address column */ | |
727 | 1, /* Augmentation size */ | |
728 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
729 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
730 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
731 | DW_CFA_nop, DW_CFA_nop, | |
732 | ||
733 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
734 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
735 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
736 | 0, 0, 0, 0, /* .plt size goes here */ | |
737 | 0, /* Augmentation size */ | |
738 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
739 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
740 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
741 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
742 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
743 | 11, /* Block length */ | |
744 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
745 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
746 | DW_OP_lit15, DW_OP_and, DW_OP_lit10, DW_OP_ge, | |
747 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
748 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
749 | }; | |
750 | ||
751 | /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */ | |
752 | ||
753 | static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt[] = | |
754 | { | |
755 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
756 | 0, 0, 0, 0, /* CIE ID */ | |
757 | 1, /* CIE version */ | |
758 | 'z', 'R', 0, /* Augmentation string */ | |
759 | 1, /* Code alignment factor */ | |
760 | 0x78, /* Data alignment factor */ | |
761 | 16, /* Return address column */ | |
762 | 1, /* Augmentation size */ | |
763 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
764 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
765 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
766 | DW_CFA_nop, DW_CFA_nop, | |
767 | ||
768 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
769 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
770 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
771 | 0, 0, 0, 0, /* .plt size goes here */ | |
772 | 0, /* Augmentation size */ | |
773 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
774 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
775 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
776 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
777 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
778 | 11, /* Block length */ | |
779 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
780 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
781 | DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge, | |
782 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
783 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
784 | }; | |
785 | ||
38b12349 | 786 | /* .eh_frame covering the non-lazy .plt section. */ |
fff53dae | 787 | |
38b12349 | 788 | static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt[] = |
fff53dae L |
789 | { |
790 | #define PLT_GOT_FDE_LENGTH 20 | |
791 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
792 | 0, 0, 0, 0, /* CIE ID */ | |
793 | 1, /* CIE version */ | |
794 | 'z', 'R', 0, /* Augmentation string */ | |
795 | 1, /* Code alignment factor */ | |
796 | 0x78, /* Data alignment factor */ | |
797 | 16, /* Return address column */ | |
798 | 1, /* Augmentation size */ | |
799 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
800 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
801 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
802 | DW_CFA_nop, DW_CFA_nop, | |
803 | ||
804 | PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
805 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
38b12349 L |
806 | 0, 0, 0, 0, /* the start of non-lazy .plt goes here */ |
807 | 0, 0, 0, 0, /* non-lazy .plt size goes here */ | |
fff53dae L |
808 | 0, /* Augmentation size */ |
809 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, | |
810 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
811 | }; | |
812 | ||
38b12349 L |
813 | /* Architecture-specific backend data for x86-64. */ |
814 | ||
815 | struct elf_x86_64_backend_data | |
816 | { | |
817 | /* Target system. */ | |
818 | enum | |
819 | { | |
820 | is_normal, | |
821 | is_nacl | |
822 | } os; | |
eed180f8 RM |
823 | }; |
824 | ||
f8222080 L |
825 | #define get_elf_x86_64_arch_data(bed) \ |
826 | ((const struct elf_x86_64_backend_data *) (bed)->arch_data) | |
827 | ||
eed180f8 | 828 | #define get_elf_x86_64_backend_data(abfd) \ |
f8222080 | 829 | get_elf_x86_64_arch_data (get_elf_backend_data (abfd)) |
eed180f8 | 830 | |
eed180f8 | 831 | /* These are the standard parameters. */ |
765e526c | 832 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt = |
eed180f8 | 833 | { |
38b12349 | 834 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ |
765e526c | 835 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
38b12349 L |
836 | elf_x86_64_lazy_plt_entry, /* plt_entry */ |
837 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
eed180f8 RM |
838 | 2, /* plt0_got1_offset */ |
839 | 8, /* plt0_got2_offset */ | |
840 | 12, /* plt0_got2_insn_end */ | |
841 | 2, /* plt_got_offset */ | |
842 | 7, /* plt_reloc_offset */ | |
843 | 12, /* plt_plt_offset */ | |
844 | 6, /* plt_got_insn_size */ | |
38b12349 | 845 | LAZY_PLT_ENTRY_SIZE, /* plt_plt_insn_end */ |
eed180f8 | 846 | 6, /* plt_lazy_offset */ |
a6798bab L |
847 | elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */ |
848 | elf_x86_64_lazy_plt_entry, /* pic_plt_entry */ | |
38b12349 L |
849 | elf_x86_64_eh_frame_lazy_plt, /* eh_frame_plt */ |
850 | sizeof (elf_x86_64_eh_frame_lazy_plt) /* eh_frame_plt_size */ | |
851 | }; | |
852 | ||
765e526c | 853 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_plt = |
38b12349 L |
854 | { |
855 | elf_x86_64_non_lazy_plt_entry, /* plt_entry */ | |
a6798bab | 856 | elf_x86_64_non_lazy_plt_entry, /* pic_plt_entry */ |
38b12349 L |
857 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
858 | 2, /* plt_got_offset */ | |
859 | 6, /* plt_got_insn_size */ | |
860 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
861 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
eed180f8 RM |
862 | }; |
863 | ||
765e526c | 864 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_bnd_plt = |
0ff2b86e | 865 | { |
38b12349 | 866 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ |
765e526c | 867 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
38b12349 L |
868 | elf_x86_64_lazy_bnd_plt_entry, /* plt_entry */ |
869 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
0ff2b86e L |
870 | 2, /* plt0_got1_offset */ |
871 | 1+8, /* plt0_got2_offset */ | |
872 | 1+12, /* plt0_got2_insn_end */ | |
873 | 1+2, /* plt_got_offset */ | |
874 | 1, /* plt_reloc_offset */ | |
875 | 7, /* plt_plt_offset */ | |
876 | 1+6, /* plt_got_insn_size */ | |
877 | 11, /* plt_plt_insn_end */ | |
878 | 0, /* plt_lazy_offset */ | |
a6798bab L |
879 | elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */ |
880 | elf_x86_64_lazy_bnd_plt_entry, /* pic_plt_entry */ | |
38b12349 L |
881 | elf_x86_64_eh_frame_lazy_bnd_plt, /* eh_frame_plt */ |
882 | sizeof (elf_x86_64_eh_frame_lazy_bnd_plt) /* eh_frame_plt_size */ | |
883 | }; | |
884 | ||
765e526c | 885 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt = |
38b12349 L |
886 | { |
887 | elf_x86_64_non_lazy_bnd_plt_entry, /* plt_entry */ | |
a6798bab | 888 | elf_x86_64_non_lazy_bnd_plt_entry, /* pic_plt_entry */ |
38b12349 L |
889 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
890 | 1+2, /* plt_got_offset */ | |
891 | 1+6, /* plt_got_insn_size */ | |
892 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
893 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
894 | }; | |
895 | ||
765e526c | 896 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt = |
ee2fdd6f L |
897 | { |
898 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ | |
765e526c | 899 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
ee2fdd6f L |
900 | elf_x86_64_lazy_ibt_plt_entry, /* plt_entry */ |
901 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
902 | 2, /* plt0_got1_offset */ | |
903 | 1+8, /* plt0_got2_offset */ | |
904 | 1+12, /* plt0_got2_insn_end */ | |
905 | 4+1+2, /* plt_got_offset */ | |
906 | 4+1, /* plt_reloc_offset */ | |
907 | 4+1+6, /* plt_plt_offset */ | |
908 | 4+1+6, /* plt_got_insn_size */ | |
909 | 4+1+5+5, /* plt_plt_insn_end */ | |
910 | 0, /* plt_lazy_offset */ | |
a6798bab L |
911 | elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */ |
912 | elf_x86_64_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
ee2fdd6f L |
913 | elf_x86_64_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ |
914 | sizeof (elf_x86_64_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ | |
915 | }; | |
916 | ||
765e526c | 917 | static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt = |
ee2fdd6f L |
918 | { |
919 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ | |
765e526c | 920 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
ee2fdd6f L |
921 | elf_x32_lazy_ibt_plt_entry, /* plt_entry */ |
922 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
923 | 2, /* plt0_got1_offset */ | |
924 | 8, /* plt0_got2_offset */ | |
925 | 12, /* plt0_got2_insn_end */ | |
926 | 4+2, /* plt_got_offset */ | |
927 | 4+1, /* plt_reloc_offset */ | |
928 | 4+6, /* plt_plt_offset */ | |
929 | 4+6, /* plt_got_insn_size */ | |
930 | 4+5+5, /* plt_plt_insn_end */ | |
931 | 0, /* plt_lazy_offset */ | |
a6798bab L |
932 | elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */ |
933 | elf_x32_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
ee2fdd6f L |
934 | elf_x32_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ |
935 | sizeof (elf_x32_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ | |
936 | }; | |
937 | ||
765e526c | 938 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt = |
ee2fdd6f L |
939 | { |
940 | elf_x86_64_non_lazy_ibt_plt_entry, /* plt_entry */ | |
a6798bab | 941 | elf_x86_64_non_lazy_ibt_plt_entry, /* pic_plt_entry */ |
ee2fdd6f L |
942 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
943 | 4+1+2, /* plt_got_offset */ | |
944 | 4+1+6, /* plt_got_insn_size */ | |
945 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
946 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
947 | }; | |
948 | ||
765e526c | 949 | static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt = |
ee2fdd6f L |
950 | { |
951 | elf_x32_non_lazy_ibt_plt_entry, /* plt_entry */ | |
a6798bab | 952 | elf_x32_non_lazy_ibt_plt_entry, /* pic_plt_entry */ |
ee2fdd6f L |
953 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
954 | 4+2, /* plt_got_offset */ | |
955 | 4+6, /* plt_got_insn_size */ | |
956 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
957 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
958 | }; | |
959 | ||
38b12349 L |
960 | static const struct elf_x86_64_backend_data elf_x86_64_arch_bed = |
961 | { | |
962 | is_normal /* os */ | |
0ff2b86e L |
963 | }; |
964 | ||
eed180f8 RM |
965 | #define elf_backend_arch_data &elf_x86_64_arch_bed |
966 | ||
b34976b6 | 967 | static bfd_boolean |
27482721 | 968 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 969 | { |
8d88c4ca NC |
970 | /* Set the right machine number for an x86-64 elf64 file. */ |
971 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 972 | return TRUE; |
8d88c4ca NC |
973 | } |
974 | ||
8059fb19 RM |
975 | static bfd_boolean |
976 | elf32_x86_64_elf_object_p (bfd *abfd) | |
977 | { | |
978 | /* Set the right machine number for an x86-64 elf32 file. */ | |
979 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
980 | return TRUE; | |
981 | } | |
982 | ||
142411ca L |
983 | /* Return TRUE if the TLS access code sequence support transition |
984 | from R_TYPE. */ | |
985 | ||
986 | static bfd_boolean | |
351f65ca L |
987 | elf_x86_64_check_tls_transition (bfd *abfd, |
988 | struct bfd_link_info *info, | |
989 | asection *sec, | |
990 | bfd_byte *contents, | |
991 | Elf_Internal_Shdr *symtab_hdr, | |
992 | struct elf_link_hash_entry **sym_hashes, | |
993 | unsigned int r_type, | |
994 | const Elf_Internal_Rela *rel, | |
995 | const Elf_Internal_Rela *relend) | |
bffbf940 | 996 | { |
142411ca L |
997 | unsigned int val; |
998 | unsigned long r_symndx; | |
5c98a14e | 999 | bfd_boolean largepic = FALSE; |
142411ca L |
1000 | struct elf_link_hash_entry *h; |
1001 | bfd_vma offset; | |
0afcef53 | 1002 | struct elf_x86_link_hash_table *htab; |
e2cbcd91 | 1003 | bfd_byte *call; |
1d4af308 | 1004 | bfd_boolean indirect_call; |
142411ca | 1005 | |
0afcef53 | 1006 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
142411ca | 1007 | offset = rel->r_offset; |
bffbf940 | 1008 | switch (r_type) |
142411ca L |
1009 | { |
1010 | case R_X86_64_TLSGD: | |
1011 | case R_X86_64_TLSLD: | |
1012 | if ((rel + 1) >= relend) | |
1013 | return FALSE; | |
1014 | ||
1015 | if (r_type == R_X86_64_TLSGD) | |
1016 | { | |
52bc799a | 1017 | /* Check transition from GD access model. For 64bit, only |
142411ca | 1018 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
e2cbcd91 L |
1019 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1020 | or | |
1021 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
1022 | .byte 0x66; rex64 | |
1023 | call *__tls_get_addr@GOTPCREL(%rip) | |
1024 | which may be converted to | |
1025 | addr32 call __tls_get_addr | |
52bc799a L |
1026 | can transit to different access model. For 32bit, only |
1027 | leaq foo@tlsgd(%rip), %rdi | |
e2cbcd91 L |
1028 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1029 | or | |
1030 | leaq foo@tlsgd(%rip), %rdi | |
1031 | .byte 0x66; rex64 | |
1032 | call *__tls_get_addr@GOTPCREL(%rip) | |
1033 | which may be converted to | |
1034 | addr32 call __tls_get_addr | |
1035 | can transit to different access model. For largepic, | |
5c98a14e | 1036 | we also support: |
e2cbcd91 L |
1037 | leaq foo@tlsgd(%rip), %rdi |
1038 | movabsq $__tls_get_addr@pltoff, %rax | |
1039 | addq $r15, %rax | |
1040 | call *%rax | |
1041 | or | |
5c98a14e JJ |
1042 | leaq foo@tlsgd(%rip), %rdi |
1043 | movabsq $__tls_get_addr@pltoff, %rax | |
1044 | addq $rbx, %rax | |
e2cbcd91 | 1045 | call *%rax */ |
142411ca | 1046 | |
fa289a5f AM |
1047 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; |
1048 | ||
5c98a14e | 1049 | if ((offset + 12) > sec->size) |
142411ca | 1050 | return FALSE; |
52bc799a | 1051 | |
e2cbcd91 L |
1052 | call = contents + offset + 4; |
1053 | if (call[0] != 0x66 | |
1054 | || !((call[1] == 0x48 | |
1055 | && call[2] == 0xff | |
1056 | && call[3] == 0x15) | |
1057 | || (call[1] == 0x48 | |
1058 | && call[2] == 0x67 | |
1059 | && call[3] == 0xe8) | |
1060 | || (call[1] == 0x66 | |
1061 | && call[2] == 0x48 | |
1062 | && call[3] == 0xe8))) | |
5c98a14e JJ |
1063 | { |
1064 | if (!ABI_64_P (abfd) | |
1065 | || (offset + 19) > sec->size | |
1066 | || offset < 3 | |
e2cbcd91 L |
1067 | || memcmp (call - 7, leaq + 1, 3) != 0 |
1068 | || memcmp (call, "\x48\xb8", 2) != 0 | |
1069 | || call[11] != 0x01 | |
1070 | || call[13] != 0xff | |
1071 | || call[14] != 0xd0 | |
1072 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1073 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1074 | return FALSE; |
1075 | largepic = TRUE; | |
1076 | } | |
1077 | else if (ABI_64_P (abfd)) | |
52bc799a | 1078 | { |
52bc799a | 1079 | if (offset < 4 |
fa289a5f | 1080 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1081 | return FALSE; |
1082 | } | |
1083 | else | |
1084 | { | |
52bc799a | 1085 | if (offset < 3 |
fa289a5f | 1086 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1087 | return FALSE; |
1088 | } | |
e2cbcd91 | 1089 | indirect_call = call[2] == 0xff; |
142411ca L |
1090 | } |
1091 | else | |
1092 | { | |
1093 | /* Check transition from LD access model. Only | |
1094 | leaq foo@tlsld(%rip), %rdi; | |
e2cbcd91 L |
1095 | call __tls_get_addr@PLT |
1096 | or | |
1097 | leaq foo@tlsld(%rip), %rdi; | |
1098 | call *__tls_get_addr@GOTPCREL(%rip) | |
1099 | which may be converted to | |
1100 | addr32 call __tls_get_addr | |
5c98a14e JJ |
1101 | can transit to different access model. For largepic |
1102 | we also support: | |
e2cbcd91 L |
1103 | leaq foo@tlsld(%rip), %rdi |
1104 | movabsq $__tls_get_addr@pltoff, %rax | |
1105 | addq $r15, %rax | |
1106 | call *%rax | |
1107 | or | |
5c98a14e JJ |
1108 | leaq foo@tlsld(%rip), %rdi |
1109 | movabsq $__tls_get_addr@pltoff, %rax | |
1110 | addq $rbx, %rax | |
e2cbcd91 | 1111 | call *%rax */ |
142411ca | 1112 | |
fa289a5f | 1113 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1114 | |
1115 | if (offset < 3 || (offset + 9) > sec->size) | |
1116 | return FALSE; | |
1117 | ||
5c98a14e | 1118 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
142411ca | 1119 | return FALSE; |
5c98a14e | 1120 | |
e2cbcd91 L |
1121 | call = contents + offset + 4; |
1122 | if (!(call[0] == 0xe8 | |
1123 | || (call[0] == 0xff && call[1] == 0x15) | |
1124 | || (call[0] == 0x67 && call[1] == 0xe8))) | |
5c98a14e JJ |
1125 | { |
1126 | if (!ABI_64_P (abfd) | |
1127 | || (offset + 19) > sec->size | |
e2cbcd91 L |
1128 | || memcmp (call, "\x48\xb8", 2) != 0 |
1129 | || call[11] != 0x01 | |
1130 | || call[13] != 0xff | |
1131 | || call[14] != 0xd0 | |
1132 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1133 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1134 | return FALSE; |
1135 | largepic = TRUE; | |
1136 | } | |
e2cbcd91 | 1137 | indirect_call = call[0] == 0xff; |
142411ca L |
1138 | } |
1139 | ||
351f65ca | 1140 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1141 | if (r_symndx < symtab_hdr->sh_info) |
1142 | return FALSE; | |
1143 | ||
1144 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1d4af308 | 1145 | if (h == NULL |
0afcef53 | 1146 | || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr) |
e2cbcd91 L |
1147 | return FALSE; |
1148 | else if (largepic) | |
1149 | return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64; | |
1150 | else if (indirect_call) | |
1151 | return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_GOTPCRELX; | |
1152 | else | |
1153 | return (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32 | |
1154 | || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
142411ca L |
1155 | |
1156 | case R_X86_64_GOTTPOFF: | |
1157 | /* Check transition from IE access model: | |
4a4c5f25 L |
1158 | mov foo@gottpoff(%rip), %reg |
1159 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1160 | */ |
1161 | ||
4a4c5f25 L |
1162 | /* Check REX prefix first. */ |
1163 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1164 | { | |
1165 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1166 | if (val != 0x48 && val != 0x4c) | |
1167 | { | |
1168 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1169 | if (ABI_64_P (abfd)) | |
1170 | return FALSE; | |
1171 | } | |
1172 | } | |
1173 | else | |
1174 | { | |
1175 | /* X32 may not have any REX prefix. */ | |
1176 | if (ABI_64_P (abfd)) | |
1177 | return FALSE; | |
1178 | if (offset < 2 || (offset + 3) > sec->size) | |
1179 | return FALSE; | |
1180 | } | |
142411ca L |
1181 | |
1182 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1183 | if (val != 0x8b && val != 0x03) | |
1184 | return FALSE; | |
1185 | ||
1186 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1187 | return (val & 0xc7) == 5; | |
1188 | ||
1189 | case R_X86_64_GOTPC32_TLSDESC: | |
1190 | /* Check transition from GDesc access model: | |
1191 | leaq x@tlsdesc(%rip), %rax | |
1192 | ||
1193 | Make sure it's a leaq adding rip to a 32-bit offset | |
1194 | into any register, although it's probably almost always | |
1195 | going to be rax. */ | |
1196 | ||
1197 | if (offset < 3 || (offset + 4) > sec->size) | |
1198 | return FALSE; | |
1199 | ||
1200 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1201 | if ((val & 0xfb) != 0x48) | |
1202 | return FALSE; | |
1203 | ||
1204 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1205 | return FALSE; | |
1206 | ||
1207 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1208 | return (val & 0xc7) == 0x05; | |
1209 | ||
1210 | case R_X86_64_TLSDESC_CALL: | |
1211 | /* Check transition from GDesc access model: | |
1212 | call *x@tlsdesc(%rax) | |
1213 | */ | |
1214 | if (offset + 2 <= sec->size) | |
1215 | { | |
1216 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
e2cbcd91 L |
1217 | call = contents + offset; |
1218 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1219 | } |
1220 | ||
1221 | return FALSE; | |
1222 | ||
1223 | default: | |
1224 | abort (); | |
1225 | } | |
1226 | } | |
1227 | ||
1228 | /* Return TRUE if the TLS access transition is OK or no transition | |
1229 | will be performed. Update R_TYPE if there is a transition. */ | |
1230 | ||
1231 | static bfd_boolean | |
351f65ca L |
1232 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1233 | asection *sec, bfd_byte *contents, | |
1234 | Elf_Internal_Shdr *symtab_hdr, | |
1235 | struct elf_link_hash_entry **sym_hashes, | |
1236 | unsigned int *r_type, int tls_type, | |
1237 | const Elf_Internal_Rela *rel, | |
1238 | const Elf_Internal_Rela *relend, | |
1239 | struct elf_link_hash_entry *h, | |
bedfd056 L |
1240 | unsigned long r_symndx, |
1241 | bfd_boolean from_relocate_section) | |
142411ca L |
1242 | { |
1243 | unsigned int from_type = *r_type; | |
1244 | unsigned int to_type = from_type; | |
1245 | bfd_boolean check = TRUE; | |
1246 | ||
bb1cb422 L |
1247 | /* Skip TLS transition for functions. */ |
1248 | if (h != NULL | |
1249 | && (h->type == STT_FUNC | |
1250 | || h->type == STT_GNU_IFUNC)) | |
1251 | return TRUE; | |
1252 | ||
142411ca | 1253 | switch (from_type) |
bffbf940 JJ |
1254 | { |
1255 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1256 | case R_X86_64_GOTPC32_TLSDESC: |
1257 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1258 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1259 | if (bfd_link_executable (info)) |
142411ca L |
1260 | { |
1261 | if (h == NULL) | |
1262 | to_type = R_X86_64_TPOFF32; | |
1263 | else | |
1264 | to_type = R_X86_64_GOTTPOFF; | |
1265 | } | |
1266 | ||
bedfd056 L |
1267 | /* When we are called from elf_x86_64_relocate_section, there may |
1268 | be additional transitions based on TLS_TYPE. */ | |
1269 | if (from_relocate_section) | |
142411ca L |
1270 | { |
1271 | unsigned int new_to_type = to_type; | |
1272 | ||
0e1862bb | 1273 | if (bfd_link_executable (info) |
142411ca L |
1274 | && h != NULL |
1275 | && h->dynindx == -1 | |
1276 | && tls_type == GOT_TLS_IE) | |
1277 | new_to_type = R_X86_64_TPOFF32; | |
1278 | ||
1279 | if (to_type == R_X86_64_TLSGD | |
1280 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1281 | || to_type == R_X86_64_TLSDESC_CALL) | |
1282 | { | |
1283 | if (tls_type == GOT_TLS_IE) | |
1284 | new_to_type = R_X86_64_GOTTPOFF; | |
1285 | } | |
1286 | ||
1287 | /* We checked the transition before when we were called from | |
351f65ca | 1288 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1289 | transition which hasn't been checked before. */ |
1290 | check = new_to_type != to_type && from_type == to_type; | |
1291 | to_type = new_to_type; | |
1292 | } | |
1293 | ||
1294 | break; | |
1295 | ||
bffbf940 | 1296 | case R_X86_64_TLSLD: |
0e1862bb | 1297 | if (bfd_link_executable (info)) |
142411ca L |
1298 | to_type = R_X86_64_TPOFF32; |
1299 | break; | |
1300 | ||
1301 | default: | |
1302 | return TRUE; | |
bffbf940 JJ |
1303 | } |
1304 | ||
142411ca L |
1305 | /* Return TRUE if there is no transition. */ |
1306 | if (from_type == to_type) | |
1307 | return TRUE; | |
1308 | ||
1309 | /* Check if the transition can be performed. */ | |
1310 | if (check | |
351f65ca L |
1311 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1312 | symtab_hdr, sym_hashes, | |
1313 | from_type, rel, relend)) | |
142411ca | 1314 | { |
2f629d23 | 1315 | reloc_howto_type *from, *to; |
4c544807 | 1316 | const char *name; |
142411ca | 1317 | |
351f65ca L |
1318 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1319 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1320 | |
4c544807 L |
1321 | if (h) |
1322 | name = h->root.root.string; | |
1323 | else | |
1324 | { | |
0afcef53 | 1325 | struct elf_x86_link_hash_table *htab; |
4dfe6ac6 | 1326 | |
0afcef53 | 1327 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
1328 | if (htab == NULL) |
1329 | name = "*unknown*"; | |
1330 | else | |
1331 | { | |
1332 | Elf_Internal_Sym *isym; | |
1333 | ||
1334 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1335 | abfd, r_symndx); | |
1336 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1337 | } | |
4c544807 L |
1338 | } |
1339 | ||
4eca0228 | 1340 | _bfd_error_handler |
695344c0 | 1341 | /* xgettext:c-format */ |
d42c267e | 1342 | (_("%B: TLS transition from %s to %s against `%s' at %#Lx " |
142411ca | 1343 | "in section `%A' failed"), |
d42c267e | 1344 | abfd, from->name, to->name, name, rel->r_offset, sec); |
142411ca L |
1345 | bfd_set_error (bfd_error_bad_value); |
1346 | return FALSE; | |
1347 | } | |
1348 | ||
1349 | *r_type = to_type; | |
1350 | return TRUE; | |
bffbf940 JJ |
1351 | } |
1352 | ||
c1d11331 L |
1353 | /* Rename some of the generic section flags to better document how they |
1354 | are used here. */ | |
338c190a L |
1355 | #define need_convert_load sec_flg0 |
1356 | #define check_relocs_failed sec_flg1 | |
1357 | ||
1358 | static bfd_boolean | |
aab921ad L |
1359 | elf_x86_64_need_pic (struct bfd_link_info *info, |
1360 | bfd *input_bfd, asection *sec, | |
338c190a L |
1361 | struct elf_link_hash_entry *h, |
1362 | Elf_Internal_Shdr *symtab_hdr, | |
1363 | Elf_Internal_Sym *isym, | |
1364 | reloc_howto_type *howto) | |
1365 | { | |
1366 | const char *v = ""; | |
1367 | const char *und = ""; | |
1368 | const char *pic = ""; | |
aab921ad | 1369 | const char *object; |
338c190a L |
1370 | |
1371 | const char *name; | |
1372 | if (h) | |
1373 | { | |
1374 | name = h->root.root.string; | |
1375 | switch (ELF_ST_VISIBILITY (h->other)) | |
1376 | { | |
1377 | case STV_HIDDEN: | |
1378 | v = _("hidden symbol "); | |
1379 | break; | |
1380 | case STV_INTERNAL: | |
1381 | v = _("internal symbol "); | |
1382 | break; | |
1383 | case STV_PROTECTED: | |
1384 | v = _("protected symbol "); | |
1385 | break; | |
1386 | default: | |
0afcef53 | 1387 | if (((struct elf_x86_link_hash_entry *) h)->def_protected) |
a5b4ee94 L |
1388 | v = _("protected symbol "); |
1389 | else | |
1390 | v = _("symbol "); | |
338c190a L |
1391 | pic = _("; recompile with -fPIC"); |
1392 | break; | |
1393 | } | |
1394 | ||
1395 | if (!h->def_regular && !h->def_dynamic) | |
1396 | und = _("undefined "); | |
1397 | } | |
1398 | else | |
1399 | { | |
1400 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL); | |
1401 | pic = _("; recompile with -fPIC"); | |
1402 | } | |
1403 | ||
aab921ad L |
1404 | if (bfd_link_dll (info)) |
1405 | object = _("a shared object"); | |
1406 | else if (bfd_link_pie (info)) | |
1407 | object = _("a PIE object"); | |
1408 | else | |
1409 | object = _("a PDE object"); | |
1410 | ||
695344c0 | 1411 | /* xgettext:c-format */ |
4eca0228 | 1412 | _bfd_error_handler (_("%B: relocation %s against %s%s`%s' can " |
aab921ad L |
1413 | "not be used when making %s%s"), |
1414 | input_bfd, howto->name, und, v, name, | |
1415 | object, pic); | |
338c190a L |
1416 | bfd_set_error (bfd_error_bad_value); |
1417 | sec->check_relocs_failed = 1; | |
1418 | return FALSE; | |
1419 | } | |
c1d11331 | 1420 | |
c175a657 L |
1421 | /* With the local symbol, foo, we convert |
1422 | mov foo@GOTPCREL(%rip), %reg | |
1423 | to | |
1424 | lea foo(%rip), %reg | |
1425 | and convert | |
1426 | call/jmp *foo@GOTPCREL(%rip) | |
1427 | to | |
1428 | nop call foo/jmp foo nop | |
1429 | When PIC is false, convert | |
1430 | test %reg, foo@GOTPCREL(%rip) | |
1431 | to | |
1432 | test $foo, %reg | |
1433 | and convert | |
1434 | binop foo@GOTPCREL(%rip), %reg | |
1435 | to | |
1436 | binop $foo, %reg | |
1437 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1438 | instructions. */ | |
1439 | ||
1440 | static bfd_boolean | |
8b43e456 | 1441 | elf_x86_64_convert_load_reloc (bfd *abfd, |
c175a657 L |
1442 | bfd_byte *contents, |
1443 | Elf_Internal_Rela *irel, | |
1444 | struct elf_link_hash_entry *h, | |
1445 | bfd_boolean *converted, | |
1446 | struct bfd_link_info *link_info) | |
1447 | { | |
0afcef53 | 1448 | struct elf_x86_link_hash_table *htab; |
c175a657 | 1449 | bfd_boolean is_pic; |
8b43e456 | 1450 | bfd_boolean no_overflow; |
c175a657 L |
1451 | bfd_boolean relocx; |
1452 | bfd_boolean to_reloc_pc32; | |
1453 | asection *tsec; | |
c175a657 L |
1454 | bfd_signed_vma raddend; |
1455 | unsigned int opcode; | |
1456 | unsigned int modrm; | |
1457 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
1458 | unsigned int r_symndx; | |
c175a657 L |
1459 | bfd_vma roff = irel->r_offset; |
1460 | ||
1461 | if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2)) | |
1462 | return TRUE; | |
1463 | ||
1464 | raddend = irel->r_addend; | |
1465 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
1466 | if (raddend != -4) | |
1467 | return TRUE; | |
1468 | ||
0afcef53 | 1469 | htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA); |
c175a657 L |
1470 | is_pic = bfd_link_pic (link_info); |
1471 | ||
1472 | relocx = (r_type == R_X86_64_GOTPCRELX | |
1473 | || r_type == R_X86_64_REX_GOTPCRELX); | |
1474 | ||
8b43e456 L |
1475 | /* TRUE if --no-relax is used. */ |
1476 | no_overflow = link_info->disable_target_specific_optimizations > 1; | |
c175a657 L |
1477 | |
1478 | r_symndx = htab->r_sym (irel->r_info); | |
1479 | ||
1480 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1481 | ||
1482 | /* Convert mov to lea since it has been done for a while. */ | |
1483 | if (opcode != 0x8b) | |
1484 | { | |
1485 | /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX | |
1486 | for call, jmp or one of adc, add, and, cmp, or, sbb, sub, | |
1487 | test, xor instructions. */ | |
1488 | if (!relocx) | |
1489 | return TRUE; | |
1490 | } | |
1491 | ||
1492 | /* We convert only to R_X86_64_PC32: | |
1493 | 1. Branch. | |
1494 | 2. R_X86_64_GOTPCREL since we can't modify REX byte. | |
8b43e456 | 1495 | 3. no_overflow is true. |
c175a657 L |
1496 | 4. PIC. |
1497 | */ | |
1498 | to_reloc_pc32 = (opcode == 0xff | |
1499 | || !relocx | |
8b43e456 | 1500 | || no_overflow |
c175a657 L |
1501 | || is_pic); |
1502 | ||
1503 | /* Get the symbol referred to by the reloc. */ | |
1504 | if (h == NULL) | |
1505 | { | |
1506 | Elf_Internal_Sym *isym | |
1507 | = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx); | |
1508 | ||
1509 | /* Skip relocation against undefined symbols. */ | |
1510 | if (isym->st_shndx == SHN_UNDEF) | |
1511 | return TRUE; | |
1512 | ||
c175a657 L |
1513 | if (isym->st_shndx == SHN_ABS) |
1514 | tsec = bfd_abs_section_ptr; | |
1515 | else if (isym->st_shndx == SHN_COMMON) | |
1516 | tsec = bfd_com_section_ptr; | |
1517 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
1518 | tsec = &_bfd_elf_large_com_section; | |
1519 | else | |
1520 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c175a657 L |
1521 | } |
1522 | else | |
1523 | { | |
1524 | /* Undefined weak symbol is only bound locally in executable | |
1525 | and its reference is resolved as 0 without relocation | |
1526 | overflow. We can only perform this optimization for | |
1527 | GOTPCRELX relocations since we need to modify REX byte. | |
1528 | It is OK convert mov with R_X86_64_GOTPCREL to | |
1529 | R_X86_64_PC32. */ | |
1530 | if ((relocx || opcode == 0x8b) | |
1531 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, | |
0afcef53 | 1532 | X86_64_ELF_DATA, |
c175a657 | 1533 | TRUE, |
0afcef53 | 1534 | elf_x86_hash_entry (h))) |
c175a657 L |
1535 | { |
1536 | if (opcode == 0xff) | |
1537 | { | |
1538 | /* Skip for branch instructions since R_X86_64_PC32 | |
1539 | may overflow. */ | |
8b43e456 | 1540 | if (no_overflow) |
c175a657 L |
1541 | return TRUE; |
1542 | } | |
1543 | else if (relocx) | |
1544 | { | |
1545 | /* For non-branch instructions, we can convert to | |
1546 | R_X86_64_32/R_X86_64_32S since we know if there | |
1547 | is a REX byte. */ | |
1548 | to_reloc_pc32 = FALSE; | |
1549 | } | |
1550 | ||
1551 | /* Since we don't know the current PC when PIC is true, | |
1552 | we can't convert to R_X86_64_PC32. */ | |
1553 | if (to_reloc_pc32 && is_pic) | |
1554 | return TRUE; | |
1555 | ||
1556 | goto convert; | |
1557 | } | |
1558 | /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since | |
1559 | ld.so may use its link-time address. */ | |
cbd0eecf L |
1560 | else if (h->start_stop |
1561 | || ((h->def_regular | |
1562 | || h->root.type == bfd_link_hash_defined | |
1563 | || h->root.type == bfd_link_hash_defweak) | |
1564 | && h != htab->elf.hdynamic | |
1565 | && SYMBOL_REFERENCES_LOCAL (link_info, h))) | |
c175a657 L |
1566 | { |
1567 | /* bfd_link_hash_new or bfd_link_hash_undefined is | |
1568 | set by an assignment in a linker script in | |
cbd0eecf L |
1569 | bfd_elf_record_link_assignment. start_stop is set |
1570 | on __start_SECNAME/__stop_SECNAME which mark section | |
1571 | SECNAME. */ | |
1572 | if (h->start_stop | |
1573 | || (h->def_regular | |
1574 | && (h->root.type == bfd_link_hash_new | |
1575 | || h->root.type == bfd_link_hash_undefined | |
1576 | || ((h->root.type == bfd_link_hash_defined | |
1577 | || h->root.type == bfd_link_hash_defweak) | |
1578 | && h->root.u.def.section == bfd_und_section_ptr)))) | |
c175a657 L |
1579 | { |
1580 | /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */ | |
8b43e456 | 1581 | if (no_overflow) |
c175a657 L |
1582 | return TRUE; |
1583 | goto convert; | |
1584 | } | |
1585 | tsec = h->root.u.def.section; | |
c175a657 L |
1586 | } |
1587 | else | |
1588 | return TRUE; | |
1589 | } | |
1590 | ||
2168b268 L |
1591 | /* Don't convert GOTPCREL relocation against large section. */ |
1592 | if (elf_section_data (tsec) != NULL | |
1593 | && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0) | |
1594 | return TRUE; | |
1595 | ||
8b43e456 L |
1596 | /* Skip since R_X86_64_PC32/R_X86_64_32/R_X86_64_32S may overflow. */ |
1597 | if (no_overflow) | |
1598 | return TRUE; | |
c175a657 | 1599 | |
8b43e456 L |
1600 | if (h != NULL) |
1601 | ((struct elf_x86_link_hash_entry *) h)->converted_reloc = 1; | |
c175a657 L |
1602 | |
1603 | convert: | |
1604 | if (opcode == 0xff) | |
1605 | { | |
1606 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
1607 | unsigned int nop; | |
1608 | unsigned int disp; | |
1609 | bfd_vma nop_offset; | |
1610 | ||
1611 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
1612 | R_X86_64_PC32. */ | |
1613 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1614 | if (modrm == 0x25) | |
1615 | { | |
1616 | /* Convert to "jmp foo nop". */ | |
1617 | modrm = 0xe9; | |
1618 | nop = NOP_OPCODE; | |
1619 | nop_offset = irel->r_offset + 3; | |
1620 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1621 | irel->r_offset -= 1; | |
1622 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1623 | } | |
1624 | else | |
1625 | { | |
0afcef53 L |
1626 | struct elf_x86_link_hash_entry *eh |
1627 | = (struct elf_x86_link_hash_entry *) h; | |
e2cbcd91 | 1628 | |
c175a657 L |
1629 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
1630 | is a nop prefix. */ | |
1631 | modrm = 0xe8; | |
e2cbcd91 L |
1632 | /* To support TLS optimization, always use addr32 prefix for |
1633 | "call *__tls_get_addr@GOTPCREL(%rip)". */ | |
1d4af308 | 1634 | if (eh && eh->tls_get_addr) |
c175a657 | 1635 | { |
e2cbcd91 L |
1636 | nop = 0x67; |
1637 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1638 | } |
1639 | else | |
e2cbcd91 L |
1640 | { |
1641 | nop = link_info->call_nop_byte; | |
1642 | if (link_info->call_nop_as_suffix) | |
1643 | { | |
1644 | nop_offset = irel->r_offset + 3; | |
1645 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1646 | irel->r_offset -= 1; | |
1647 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1648 | } | |
1649 | else | |
1650 | nop_offset = irel->r_offset - 2; | |
1651 | } | |
c175a657 L |
1652 | } |
1653 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1654 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1655 | r_type = R_X86_64_PC32; | |
1656 | } | |
1657 | else | |
1658 | { | |
1659 | unsigned int rex; | |
1660 | unsigned int rex_mask = REX_R; | |
1661 | ||
1662 | if (r_type == R_X86_64_REX_GOTPCRELX) | |
1663 | rex = bfd_get_8 (abfd, contents + roff - 3); | |
1664 | else | |
1665 | rex = 0; | |
1666 | ||
1667 | if (opcode == 0x8b) | |
1668 | { | |
1669 | if (to_reloc_pc32) | |
1670 | { | |
1671 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1672 | "lea foo(%rip), %reg". */ | |
1673 | opcode = 0x8d; | |
1674 | r_type = R_X86_64_PC32; | |
1675 | } | |
1676 | else | |
1677 | { | |
1678 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1679 | "mov $foo, %reg". */ | |
1680 | opcode = 0xc7; | |
1681 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1682 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1683 | if ((rex & REX_W) != 0 | |
1684 | && ABI_64_P (link_info->output_bfd)) | |
1685 | { | |
1686 | /* Keep the REX_W bit in REX byte for LP64. */ | |
1687 | r_type = R_X86_64_32S; | |
1688 | goto rewrite_modrm_rex; | |
1689 | } | |
1690 | else | |
1691 | { | |
1692 | /* If the REX_W bit in REX byte isn't needed, | |
1693 | use R_X86_64_32 and clear the W bit to avoid | |
1694 | sign-extend imm32 to imm64. */ | |
1695 | r_type = R_X86_64_32; | |
1696 | /* Clear the W bit in REX byte. */ | |
1697 | rex_mask |= REX_W; | |
1698 | goto rewrite_modrm_rex; | |
1699 | } | |
1700 | } | |
1701 | } | |
1702 | else | |
1703 | { | |
1704 | /* R_X86_64_PC32 isn't supported. */ | |
1705 | if (to_reloc_pc32) | |
1706 | return TRUE; | |
1707 | ||
1708 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1709 | if (opcode == 0x85) | |
1710 | { | |
1711 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
1712 | "test $foo, %reg". */ | |
1713 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1714 | opcode = 0xf7; | |
1715 | } | |
1716 | else | |
1717 | { | |
1718 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
1719 | "binop $foo, %reg". */ | |
1720 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
1721 | opcode = 0x81; | |
1722 | } | |
1723 | ||
1724 | /* Use R_X86_64_32 with 32-bit operand to avoid relocation | |
1725 | overflow when sign-extending imm32 to imm64. */ | |
1726 | r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32; | |
1727 | ||
1728 | rewrite_modrm_rex: | |
1729 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1730 | ||
1731 | if (rex) | |
1732 | { | |
1733 | /* Move the R bit to the B bit in REX byte. */ | |
1734 | rex = (rex & ~rex_mask) | (rex & REX_R) >> 2; | |
1735 | bfd_put_8 (abfd, rex, contents + roff - 3); | |
1736 | } | |
1737 | ||
1738 | /* No addend for R_X86_64_32/R_X86_64_32S relocations. */ | |
1739 | irel->r_addend = 0; | |
1740 | } | |
1741 | ||
1742 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1743 | } | |
1744 | ||
1745 | irel->r_info = htab->r_info (r_symndx, r_type); | |
1746 | ||
1747 | *converted = TRUE; | |
1748 | ||
1749 | return TRUE; | |
1750 | } | |
1751 | ||
70256ad8 | 1752 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1753 | calculate needed space in the global offset table, procedure |
1754 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1755 | |
b34976b6 | 1756 | static bfd_boolean |
351f65ca L |
1757 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1758 | asection *sec, | |
1759 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1760 | { |
0afcef53 | 1761 | struct elf_x86_link_hash_table *htab; |
70256ad8 AJ |
1762 | Elf_Internal_Shdr *symtab_hdr; |
1763 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1764 | const Elf_Internal_Rela *rel; |
1765 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 1766 | asection *sreloc; |
bedfd056 | 1767 | bfd_byte *contents; |
70256ad8 | 1768 | |
0e1862bb | 1769 | if (bfd_link_relocatable (info)) |
b34976b6 | 1770 | return TRUE; |
70256ad8 | 1771 | |
081b1afe L |
1772 | /* Don't do anything special with non-loaded, non-alloced sections. |
1773 | In particular, any relocs in such sections should not affect GOT | |
1774 | and PLT reference counting (ie. we don't allow them to create GOT | |
1775 | or PLT entries), there's no possibility or desire to optimize TLS | |
1776 | relocs, and there's not much point in propagating relocs to shared | |
1777 | libs that the dynamic linker won't relocate. */ | |
1778 | if ((sec->flags & SEC_ALLOC) == 0) | |
1779 | return TRUE; | |
1780 | ||
0afcef53 | 1781 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 | 1782 | if (htab == NULL) |
afd9acee L |
1783 | { |
1784 | sec->check_relocs_failed = 1; | |
1785 | return FALSE; | |
1786 | } | |
4dfe6ac6 | 1787 | |
fe53b4a4 L |
1788 | BFD_ASSERT (is_x86_elf (abfd, htab)); |
1789 | ||
bedfd056 L |
1790 | /* Get the section contents. */ |
1791 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1792 | contents = elf_section_data (sec)->this_hdr.contents; | |
1793 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1794 | { | |
1795 | sec->check_relocs_failed = 1; | |
1796 | return FALSE; | |
1797 | } | |
1798 | ||
0ffa91dd | 1799 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1800 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1801 | |
c434dee6 | 1802 | sreloc = NULL; |
cbe950e9 | 1803 | |
70256ad8 AJ |
1804 | rel_end = relocs + sec->reloc_count; |
1805 | for (rel = relocs; rel < rel_end; rel++) | |
1806 | { | |
bffbf940 | 1807 | unsigned int r_type; |
d42c267e | 1808 | unsigned int r_symndx; |
70256ad8 | 1809 | struct elf_link_hash_entry *h; |
0afcef53 | 1810 | struct elf_x86_link_hash_entry *eh; |
4c544807 L |
1811 | Elf_Internal_Sym *isym; |
1812 | const char *name; | |
06a6a421 | 1813 | bfd_boolean size_reloc; |
70256ad8 | 1814 | |
351f65ca L |
1815 | r_symndx = htab->r_sym (rel->r_info); |
1816 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1817 | |
1818 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1819 | { | |
695344c0 | 1820 | /* xgettext:c-format */ |
4eca0228 AM |
1821 | _bfd_error_handler (_("%B: bad symbol index: %d"), |
1822 | abfd, r_symndx); | |
afd9acee | 1823 | goto error_return; |
c434dee6 AJ |
1824 | } |
1825 | ||
70256ad8 | 1826 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1827 | { |
1828 | /* A local symbol. */ | |
c2e61a4e L |
1829 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1830 | abfd, r_symndx); | |
1831 | if (isym == NULL) | |
afd9acee | 1832 | goto error_return; |
c25bc9fc L |
1833 | |
1834 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1835 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1836 | { |
0afcef53 L |
1837 | h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, |
1838 | TRUE); | |
c25bc9fc | 1839 | if (h == NULL) |
afd9acee | 1840 | goto error_return; |
6bbec505 | 1841 | |
c25bc9fc | 1842 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
1843 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
1844 | isym, NULL); | |
c25bc9fc L |
1845 | h->type = STT_GNU_IFUNC; |
1846 | h->def_regular = 1; | |
1847 | h->ref_regular = 1; | |
1848 | h->forced_local = 1; | |
1849 | h->root.type = bfd_link_hash_defined; | |
1850 | } | |
1851 | else | |
1852 | h = NULL; | |
1853 | } | |
70256ad8 | 1854 | else |
71cb9464 | 1855 | { |
4c544807 | 1856 | isym = NULL; |
71cb9464 L |
1857 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1858 | while (h->root.type == bfd_link_hash_indirect | |
1859 | || h->root.type == bfd_link_hash_warning) | |
1860 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1861 | } |
cbe950e9 | 1862 | |
d1534d16 L |
1863 | /* Check invalid x32 relocations. */ |
1864 | if (!ABI_64_P (abfd)) | |
1865 | switch (r_type) | |
1866 | { | |
1867 | default: | |
1868 | break; | |
1869 | ||
d1534d16 L |
1870 | case R_X86_64_DTPOFF64: |
1871 | case R_X86_64_TPOFF64: | |
1872 | case R_X86_64_PC64: | |
1873 | case R_X86_64_GOTOFF64: | |
1874 | case R_X86_64_GOT64: | |
1875 | case R_X86_64_GOTPCREL64: | |
1876 | case R_X86_64_GOTPC64: | |
1877 | case R_X86_64_GOTPLT64: | |
1878 | case R_X86_64_PLTOFF64: | |
1879 | { | |
1880 | if (h) | |
1881 | name = h->root.root.string; | |
1882 | else | |
1883 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1884 | NULL); | |
4eca0228 | 1885 | _bfd_error_handler |
695344c0 | 1886 | /* xgettext:c-format */ |
d1534d16 L |
1887 | (_("%B: relocation %s against symbol `%s' isn't " |
1888 | "supported in x32 mode"), abfd, | |
1889 | x86_64_elf_howto_table[r_type].name, name); | |
1890 | bfd_set_error (bfd_error_bad_value); | |
afd9acee | 1891 | goto error_return; |
d1534d16 L |
1892 | } |
1893 | break; | |
1894 | } | |
1895 | ||
c25bc9fc L |
1896 | if (h != NULL) |
1897 | { | |
ad1e85de L |
1898 | /* It is referenced by a non-shared object. */ |
1899 | h->ref_regular = 1; | |
bc4e12de | 1900 | h->root.non_ir_ref_regular = 1; |
13a2df29 L |
1901 | |
1902 | if (h->type == STT_GNU_IFUNC) | |
1903 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
1904 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 1905 | } |
70256ad8 | 1906 | |
bedfd056 | 1907 | if (! elf_x86_64_tls_transition (info, abfd, sec, contents, |
351f65ca L |
1908 | symtab_hdr, sym_hashes, |
1909 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 1910 | rel, rel_end, h, r_symndx, FALSE)) |
afd9acee | 1911 | goto error_return; |
142411ca | 1912 | |
0afcef53 | 1913 | eh = (struct elf_x86_link_hash_entry *) h; |
bffbf940 | 1914 | switch (r_type) |
70256ad8 | 1915 | { |
bffbf940 | 1916 | case R_X86_64_TLSLD: |
0afcef53 | 1917 | htab->tls_ld_or_ldm_got.refcount += 1; |
bffbf940 JJ |
1918 | goto create_got; |
1919 | ||
1920 | case R_X86_64_TPOFF32: | |
0e1862bb | 1921 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
aab921ad | 1922 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 1923 | &x86_64_elf_howto_table[r_type]); |
aec6b87e L |
1924 | if (eh != NULL) |
1925 | eh->has_got_reloc = 1; | |
bffbf940 | 1926 | break; |
c434dee6 | 1927 | |
bffbf940 | 1928 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1929 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
1930 | info->flags |= DF_STATIC_TLS; |
1931 | /* Fall through */ | |
70256ad8 | 1932 | |
bffbf940 JJ |
1933 | case R_X86_64_GOT32: |
1934 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
1935 | case R_X86_64_GOTPCRELX: |
1936 | case R_X86_64_REX_GOTPCRELX: | |
bffbf940 | 1937 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
1938 | case R_X86_64_GOT64: |
1939 | case R_X86_64_GOTPCREL64: | |
1940 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
1941 | case R_X86_64_GOTPC32_TLSDESC: |
1942 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
1943 | /* This symbol requires a global offset table entry. */ |
1944 | { | |
1945 | int tls_type, old_tls_type; | |
1946 | ||
1947 | switch (r_type) | |
1948 | { | |
1949 | default: tls_type = GOT_NORMAL; break; | |
1950 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
1951 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
1952 | case R_X86_64_GOTPC32_TLSDESC: |
1953 | case R_X86_64_TLSDESC_CALL: | |
1954 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
1955 | } |
1956 | ||
1957 | if (h != NULL) | |
1958 | { | |
1959 | h->got.refcount += 1; | |
aec6b87e | 1960 | old_tls_type = eh->tls_type; |
bffbf940 JJ |
1961 | } |
1962 | else | |
1963 | { | |
1964 | bfd_signed_vma *local_got_refcounts; | |
1965 | ||
1966 | /* This is a global offset table entry for a local symbol. */ | |
1967 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1968 | if (local_got_refcounts == NULL) | |
1969 | { | |
1970 | bfd_size_type size; | |
1971 | ||
1972 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1973 | size *= sizeof (bfd_signed_vma) |
1974 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
1975 | local_got_refcounts = ((bfd_signed_vma *) |
1976 | bfd_zalloc (abfd, size)); | |
1977 | if (local_got_refcounts == NULL) | |
afd9acee | 1978 | goto error_return; |
bffbf940 | 1979 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
0afcef53 | 1980 | elf_x86_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 1981 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
0afcef53 | 1982 | elf_x86_local_got_tls_type (abfd) |
67a4f2b7 | 1983 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
1984 | } |
1985 | local_got_refcounts[r_symndx] += 1; | |
1986 | old_tls_type | |
0afcef53 | 1987 | = elf_x86_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
1988 | } |
1989 | ||
1990 | /* If a TLS symbol is accessed using IE at least once, | |
1991 | there is no point to use dynamic model for it. */ | |
1992 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
1993 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
1994 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 1995 | { |
67a4f2b7 | 1996 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 1997 | tls_type = old_tls_type; |
67a4f2b7 AO |
1998 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1999 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2000 | tls_type |= old_tls_type; | |
bffbf940 JJ |
2001 | else |
2002 | { | |
09a24cbf | 2003 | if (h) |
4c544807 L |
2004 | name = h->root.root.string; |
2005 | else | |
2006 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
2007 | isym, NULL); | |
4eca0228 | 2008 | _bfd_error_handler |
695344c0 | 2009 | /* xgettext:c-format */ |
63a5468a AM |
2010 | (_("%B: '%s' accessed both as normal and" |
2011 | " thread local symbol"), | |
4c544807 | 2012 | abfd, name); |
68c4a57e | 2013 | bfd_set_error (bfd_error_bad_value); |
afd9acee | 2014 | goto error_return; |
bffbf940 JJ |
2015 | } |
2016 | } | |
2017 | ||
2018 | if (old_tls_type != tls_type) | |
2019 | { | |
aec6b87e L |
2020 | if (eh != NULL) |
2021 | eh->tls_type = tls_type; | |
bffbf940 | 2022 | else |
0afcef53 | 2023 | elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
2024 | } |
2025 | } | |
c434dee6 AJ |
2026 | /* Fall through */ |
2027 | ||
d6ab8113 JB |
2028 | case R_X86_64_GOTOFF64: |
2029 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2030 | case R_X86_64_GOTPC64: |
bffbf940 | 2031 | create_got: |
aec6b87e L |
2032 | if (eh != NULL) |
2033 | eh->has_got_reloc = 1; | |
70256ad8 AJ |
2034 | break; |
2035 | ||
2036 | case R_X86_64_PLT32: | |
c3320543 | 2037 | case R_X86_64_PLT32_BND: |
70256ad8 | 2038 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
2039 | actually build the entry in adjust_dynamic_symbol, |
2040 | because this might be a case of linking PIC code which is | |
2041 | never referenced by a dynamic object, in which case we | |
2042 | don't need to generate a procedure linkage table entry | |
2043 | after all. */ | |
70256ad8 AJ |
2044 | |
2045 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 2046 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
2047 | if (h == NULL) |
2048 | continue; | |
2049 | ||
aec6b87e | 2050 | eh->has_got_reloc = 1; |
f5385ebf | 2051 | h->needs_plt = 1; |
51b64d56 | 2052 | h->plt.refcount += 1; |
70256ad8 AJ |
2053 | break; |
2054 | ||
7b81dfbb AJ |
2055 | case R_X86_64_PLTOFF64: |
2056 | /* This tries to form the 'address' of a function relative | |
2057 | to GOT. For global symbols we need a PLT entry. */ | |
2058 | if (h != NULL) | |
2059 | { | |
2060 | h->needs_plt = 1; | |
2061 | h->plt.refcount += 1; | |
2062 | } | |
2063 | goto create_got; | |
2064 | ||
6a3e1bae L |
2065 | case R_X86_64_SIZE32: |
2066 | case R_X86_64_SIZE64: | |
06a6a421 | 2067 | size_reloc = TRUE; |
6a3e1bae L |
2068 | goto do_size; |
2069 | ||
248775ba L |
2070 | case R_X86_64_32: |
2071 | if (!ABI_64_P (abfd)) | |
2072 | goto pointer; | |
1a0670f3 | 2073 | /* Fall through. */ |
cc78d0af AJ |
2074 | case R_X86_64_8: |
2075 | case R_X86_64_16: | |
70256ad8 | 2076 | case R_X86_64_32S: |
338c190a L |
2077 | /* Check relocation overflow as these relocs may lead to |
2078 | run-time relocation overflow. Don't error out for | |
1b71fb54 | 2079 | sections we don't care about, such as debug sections or |
338c190a | 2080 | when relocation overflow check is disabled. */ |
4c10bbaa | 2081 | if (!info->no_reloc_overflow_check |
338c190a L |
2082 | && (bfd_link_pic (info) |
2083 | || (bfd_link_executable (info) | |
2084 | && h != NULL | |
2085 | && !h->def_regular | |
2086 | && h->def_dynamic | |
081b1afe | 2087 | && (sec->flags & SEC_READONLY) == 0))) |
aab921ad | 2088 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2089 | &x86_64_elf_howto_table[r_type]); |
1b71fb54 AJ |
2090 | /* Fall through. */ |
2091 | ||
c434dee6 AJ |
2092 | case R_X86_64_PC8: |
2093 | case R_X86_64_PC16: | |
70256ad8 | 2094 | case R_X86_64_PC32: |
c3320543 | 2095 | case R_X86_64_PC32_BND: |
d6ab8113 | 2096 | case R_X86_64_PC64: |
1b71fb54 | 2097 | case R_X86_64_64: |
248775ba | 2098 | pointer: |
aec6b87e L |
2099 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
2100 | eh->has_non_got_reloc = 1; | |
bf52d7c7 L |
2101 | /* We are called after all symbols have been resolved. Only |
2102 | relocation against STT_GNU_IFUNC symbol must go through | |
2103 | PLT. */ | |
d1ed1c7d L |
2104 | if (h != NULL |
2105 | && (bfd_link_executable (info) | |
bf52d7c7 | 2106 | || h->type == STT_GNU_IFUNC)) |
c434dee6 AJ |
2107 | { |
2108 | /* If this reloc is in a read-only section, we might | |
2109 | need a copy reloc. We can't check reliably at this | |
2110 | stage whether the section is read-only, as input | |
2111 | sections have not yet been mapped to output sections. | |
2112 | Tentatively set the flag for now, and correct in | |
2113 | adjust_dynamic_symbol. */ | |
f5385ebf | 2114 | h->non_got_ref = 1; |
c434dee6 | 2115 | |
233cc9c1 L |
2116 | /* We may need a .plt entry if the symbol is a function |
2117 | defined in a shared lib or is a STT_GNU_IFUNC function | |
2118 | referenced from the code or read-only section. */ | |
34bb2571 L |
2119 | if (!h->def_regular |
2120 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
233cc9c1 L |
2121 | h->plt.refcount += 1; |
2122 | ||
5db4f0d3 L |
2123 | if (r_type == R_X86_64_PC32) |
2124 | { | |
2125 | /* Since something like ".long foo - ." may be used | |
2126 | as pointer, make sure that PLT is used if foo is | |
2127 | a function defined in a shared library. */ | |
2128 | if ((sec->flags & SEC_CODE) == 0) | |
2129 | h->pointer_equality_needed = 1; | |
2130 | } | |
2131 | else if (r_type != R_X86_64_PC32_BND | |
2132 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
2133 | { |
2134 | h->pointer_equality_needed = 1; | |
2135 | /* At run-time, R_X86_64_64 can be resolved for both | |
2136 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
2137 | can only be resolved for x32. */ | |
2138 | if ((sec->flags & SEC_READONLY) == 0 | |
2139 | && (r_type == R_X86_64_64 | |
2140 | || (!ABI_64_P (abfd) | |
2141 | && (r_type == R_X86_64_32 | |
2142 | || r_type == R_X86_64_32S)))) | |
aec6b87e | 2143 | eh->func_pointer_refcount += 1; |
04ebc307 | 2144 | } |
c434dee6 | 2145 | } |
70256ad8 | 2146 | |
06a6a421 | 2147 | size_reloc = FALSE; |
6a3e1bae | 2148 | do_size: |
70256ad8 AJ |
2149 | /* If we are creating a shared library, and this is a reloc |
2150 | against a global symbol, or a non PC relative reloc | |
2151 | against a local symbol, then we need to copy the reloc | |
2152 | into the shared library. However, if we are linking with | |
2153 | -Bsymbolic, we do not need to copy a reloc against a | |
2154 | global symbol which is defined in an object we are | |
407443a3 | 2155 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
2156 | this point we have not seen all the input files, so it is |
2157 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
2158 | later (it is never cleared). In case of a weak definition, |
2159 | DEF_REGULAR may be cleared later by a strong definition in | |
2160 | a shared library. We account for that possibility below by | |
2161 | storing information in the relocs_copied field of the hash | |
2162 | table entry. A similar situation occurs when creating | |
2163 | shared libraries and symbol visibility changes render the | |
31c0ebfe | 2164 | symbol local. |
c434dee6 AJ |
2165 | |
2166 | If on the other hand, we are creating an executable, we | |
2167 | may need to keep relocations for symbols satisfied by a | |
2168 | dynamic library if we manage to avoid copy relocs for the | |
233cc9c1 L |
2169 | symbol. |
2170 | ||
2171 | Generate dynamic pointer relocation against STT_GNU_IFUNC | |
2172 | symbol in the non-code section. */ | |
081b1afe L |
2173 | if ((bfd_link_pic (info) |
2174 | && (! IS_X86_64_PCREL_TYPE (r_type) | |
2175 | || (h != NULL | |
2176 | && (! (bfd_link_pie (info) | |
2177 | || SYMBOLIC_BIND (info, h)) | |
2178 | || h->root.type == bfd_link_hash_defweak | |
2179 | || !h->def_regular)))) | |
233cc9c1 L |
2180 | || (h != NULL |
2181 | && h->type == STT_GNU_IFUNC | |
2182 | && r_type == htab->pointer_r_type | |
2183 | && (sec->flags & SEC_CODE) == 0) | |
081b1afe L |
2184 | || (ELIMINATE_COPY_RELOCS |
2185 | && !bfd_link_pic (info) | |
2186 | && h != NULL | |
2187 | && (h->root.type == bfd_link_hash_defweak | |
2188 | || !h->def_regular))) | |
70256ad8 | 2189 | { |
e03a8ed8 L |
2190 | struct elf_dyn_relocs *p; |
2191 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2192 | |
2193 | /* We must copy these reloc types into the output file. | |
2194 | Create a reloc section in dynobj and make room for | |
2195 | this reloc. */ | |
70256ad8 AJ |
2196 | if (sreloc == NULL) |
2197 | { | |
83bac4b0 | 2198 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
2199 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
2200 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 2201 | |
70256ad8 | 2202 | if (sreloc == NULL) |
afd9acee | 2203 | goto error_return; |
70256ad8 AJ |
2204 | } |
2205 | ||
c434dee6 AJ |
2206 | /* If this is a global symbol, we count the number of |
2207 | relocations we need for this symbol. */ | |
2208 | if (h != NULL) | |
aec6b87e | 2209 | head = &eh->dyn_relocs; |
c434dee6 AJ |
2210 | else |
2211 | { | |
2212 | /* Track dynamic relocs needed for local syms too. | |
2213 | We really need local syms available to do this | |
2214 | easily. Oh well. */ | |
c434dee6 | 2215 | asection *s; |
87d72d41 | 2216 | void **vpp; |
87d72d41 AM |
2217 | |
2218 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2219 | abfd, r_symndx); | |
2220 | if (isym == NULL) | |
afd9acee | 2221 | goto error_return; |
87d72d41 AM |
2222 | |
2223 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2224 | if (s == NULL) |
87d72d41 | 2225 | s = sec; |
70256ad8 | 2226 | |
e81d3500 DD |
2227 | /* Beware of type punned pointers vs strict aliasing |
2228 | rules. */ | |
2229 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2230 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2231 | } |
70256ad8 | 2232 | |
c434dee6 AJ |
2233 | p = *head; |
2234 | if (p == NULL || p->sec != sec) | |
2235 | { | |
2236 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 2237 | |
e03a8ed8 | 2238 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2239 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2240 | if (p == NULL) |
afd9acee | 2241 | goto error_return; |
c434dee6 AJ |
2242 | p->next = *head; |
2243 | *head = p; | |
2244 | p->sec = sec; | |
2245 | p->count = 0; | |
2246 | p->pc_count = 0; | |
70256ad8 | 2247 | } |
c434dee6 AJ |
2248 | |
2249 | p->count += 1; | |
06a6a421 L |
2250 | /* Count size relocation as PC-relative relocation. */ |
2251 | if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc) | |
c434dee6 | 2252 | p->pc_count += 1; |
70256ad8 AJ |
2253 | } |
2254 | break; | |
fe4770f4 AJ |
2255 | |
2256 | /* This relocation describes the C++ object vtable hierarchy. | |
2257 | Reconstruct it for later use during GC. */ | |
2258 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2259 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
afd9acee | 2260 | goto error_return; |
fe4770f4 AJ |
2261 | break; |
2262 | ||
2263 | /* This relocation describes which C++ vtable entries are actually | |
2264 | used. Record for later use during GC. */ | |
2265 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
2266 | BFD_ASSERT (h != NULL); |
2267 | if (h != NULL | |
2268 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
afd9acee | 2269 | goto error_return; |
fe4770f4 | 2270 | break; |
c434dee6 AJ |
2271 | |
2272 | default: | |
2273 | break; | |
70256ad8 | 2274 | } |
dd7e64d4 | 2275 | |
56ceb5b5 L |
2276 | if ((r_type == R_X86_64_GOTPCREL |
2277 | || r_type == R_X86_64_GOTPCRELX | |
2278 | || r_type == R_X86_64_REX_GOTPCRELX) | |
c1d11331 | 2279 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
56ceb5b5 | 2280 | sec->need_convert_load = 1; |
70256ad8 AJ |
2281 | } |
2282 | ||
bedfd056 L |
2283 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2284 | { | |
2285 | if (!info->keep_memory) | |
2286 | free (contents); | |
2287 | else | |
2288 | { | |
2289 | /* Cache the section contents for elf_link_input_bfd. */ | |
2290 | elf_section_data (sec)->this_hdr.contents = contents; | |
2291 | } | |
2292 | } | |
2293 | ||
b34976b6 | 2294 | return TRUE; |
afd9acee L |
2295 | |
2296 | error_return: | |
bedfd056 L |
2297 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2298 | free (contents); | |
afd9acee L |
2299 | sec->check_relocs_failed = 1; |
2300 | return FALSE; | |
70256ad8 AJ |
2301 | } |
2302 | ||
c175a657 | 2303 | /* Convert load via the GOT slot to load immediate. */ |
daa67607 | 2304 | |
5e2ac45d L |
2305 | bfd_boolean |
2306 | _bfd_x86_64_elf_convert_load (bfd *abfd, asection *sec, | |
2307 | struct bfd_link_info *link_info) | |
daa67607 L |
2308 | { |
2309 | Elf_Internal_Shdr *symtab_hdr; | |
2310 | Elf_Internal_Rela *internal_relocs; | |
2311 | Elf_Internal_Rela *irel, *irelend; | |
2312 | bfd_byte *contents; | |
0afcef53 | 2313 | struct elf_x86_link_hash_table *htab; |
c175a657 | 2314 | bfd_boolean changed; |
daa67607 L |
2315 | bfd_signed_vma *local_got_refcounts; |
2316 | ||
2317 | /* Don't even try to convert non-ELF outputs. */ | |
2318 | if (!is_elf_hash_table (link_info->hash)) | |
2319 | return FALSE; | |
2320 | ||
c1d11331 | 2321 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 2322 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
56ceb5b5 | 2323 | || sec->need_convert_load == 0 |
c8831961 | 2324 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
2325 | return TRUE; |
2326 | ||
2327 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2328 | ||
2329 | /* Load the relocations for this section. */ | |
2330 | internal_relocs = (_bfd_elf_link_read_relocs | |
2331 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
2332 | link_info->keep_memory)); | |
2333 | if (internal_relocs == NULL) | |
2334 | return FALSE; | |
2335 | ||
c175a657 | 2336 | changed = FALSE; |
0afcef53 | 2337 | htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA); |
daa67607 L |
2338 | local_got_refcounts = elf_local_got_refcounts (abfd); |
2339 | ||
2340 | /* Get the section contents. */ | |
2341 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2342 | contents = elf_section_data (sec)->this_hdr.contents; | |
2343 | else | |
2344 | { | |
2345 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2346 | goto error_return; | |
2347 | } | |
2348 | ||
2349 | irelend = internal_relocs + sec->reloc_count; | |
2350 | for (irel = internal_relocs; irel < irelend; irel++) | |
2351 | { | |
2352 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
c175a657 | 2353 | unsigned int r_symndx; |
daa67607 | 2354 | struct elf_link_hash_entry *h; |
c175a657 | 2355 | bfd_boolean converted; |
59cab532 | 2356 | |
c175a657 L |
2357 | if (r_type != R_X86_64_GOTPCRELX |
2358 | && r_type != R_X86_64_REX_GOTPCRELX | |
2359 | && r_type != R_X86_64_GOTPCREL) | |
dfc87947 L |
2360 | continue; |
2361 | ||
c175a657 | 2362 | r_symndx = htab->r_sym (irel->r_info); |
daa67607 | 2363 | if (r_symndx < symtab_hdr->sh_info) |
0afcef53 L |
2364 | h = _bfd_elf_x86_get_local_sym_hash (htab, sec->owner, |
2365 | (const Elf_Internal_Rela *) irel, | |
2366 | FALSE); | |
59cab532 L |
2367 | else |
2368 | { | |
c175a657 | 2369 | h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info]; |
59cab532 L |
2370 | while (h->root.type == bfd_link_hash_indirect |
2371 | || h->root.type == bfd_link_hash_warning) | |
2372 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
59cab532 L |
2373 | } |
2374 | ||
c175a657 L |
2375 | /* STT_GNU_IFUNC must keep GOTPCREL relocations. */ |
2376 | if (h != NULL && h->type == STT_GNU_IFUNC) | |
2377 | continue; | |
daa67607 | 2378 | |
c175a657 | 2379 | converted = FALSE; |
8b43e456 | 2380 | if (!elf_x86_64_convert_load_reloc (abfd, contents, irel, h, |
c175a657 L |
2381 | &converted, link_info)) |
2382 | goto error_return; | |
56ceb5b5 | 2383 | |
c175a657 | 2384 | if (converted) |
56ceb5b5 | 2385 | { |
c175a657 L |
2386 | changed = converted; |
2387 | if (h) | |
56ceb5b5 | 2388 | { |
c175a657 L |
2389 | if (h->got.refcount > 0) |
2390 | h->got.refcount -= 1; | |
56ceb5b5 L |
2391 | } |
2392 | else | |
2393 | { | |
c175a657 L |
2394 | if (local_got_refcounts != NULL |
2395 | && local_got_refcounts[r_symndx] > 0) | |
2396 | local_got_refcounts[r_symndx] -= 1; | |
56ceb5b5 | 2397 | } |
daa67607 L |
2398 | } |
2399 | } | |
2400 | ||
2401 | if (contents != NULL | |
2402 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2403 | { | |
c175a657 | 2404 | if (!changed && !link_info->keep_memory) |
daa67607 L |
2405 | free (contents); |
2406 | else | |
2407 | { | |
2408 | /* Cache the section contents for elf_link_input_bfd. */ | |
2409 | elf_section_data (sec)->this_hdr.contents = contents; | |
2410 | } | |
2411 | } | |
2412 | ||
2413 | if (elf_section_data (sec)->relocs != internal_relocs) | |
2414 | { | |
c175a657 | 2415 | if (!changed) |
daa67607 L |
2416 | free (internal_relocs); |
2417 | else | |
2418 | elf_section_data (sec)->relocs = internal_relocs; | |
2419 | } | |
2420 | ||
2421 | return TRUE; | |
2422 | ||
2423 | error_return: | |
2424 | if (contents != NULL | |
2425 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2426 | free (contents); | |
2427 | if (internal_relocs != NULL | |
2428 | && elf_section_data (sec)->relocs != internal_relocs) | |
2429 | free (internal_relocs); | |
2430 | return FALSE; | |
2431 | } | |
2432 | ||
bffbf940 JJ |
2433 | /* Return the relocation value for @tpoff relocation |
2434 | if STT_TLS virtual address is ADDRESS. */ | |
2435 | ||
2436 | static bfd_vma | |
351f65ca | 2437 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 2438 | { |
e1918d23 | 2439 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
2440 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
2441 | bfd_vma static_tls_size; | |
bffbf940 JJ |
2442 | |
2443 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 2444 | if (htab->tls_sec == NULL) |
bffbf940 | 2445 | return 0; |
7dc98aea RO |
2446 | |
2447 | /* Consider special static TLS alignment requirements. */ | |
2448 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
2449 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
2450 | } |
2451 | ||
90f487df L |
2452 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
2453 | branch? */ | |
2454 | ||
2455 | static bfd_boolean | |
2456 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
2457 | { | |
2458 | /* Opcode Instruction | |
2459 | 0xe8 call | |
2460 | 0xe9 jump | |
2461 | 0x0f 0x8x conditional jump */ | |
2462 | return ((offset > 0 | |
2463 | && (contents [offset - 1] == 0xe8 | |
2464 | || contents [offset - 1] == 0xe9)) | |
2465 | || (offset > 1 | |
2466 | && contents [offset - 2] == 0x0f | |
2467 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
2468 | } | |
2469 | ||
8d88c4ca NC |
2470 | /* Relocate an x86_64 ELF section. */ |
2471 | ||
b34976b6 | 2472 | static bfd_boolean |
351f65ca L |
2473 | elf_x86_64_relocate_section (bfd *output_bfd, |
2474 | struct bfd_link_info *info, | |
2475 | bfd *input_bfd, | |
2476 | asection *input_section, | |
2477 | bfd_byte *contents, | |
2478 | Elf_Internal_Rela *relocs, | |
2479 | Elf_Internal_Sym *local_syms, | |
2480 | asection **local_sections) | |
8d88c4ca | 2481 | { |
0afcef53 | 2482 | struct elf_x86_link_hash_table *htab; |
8d88c4ca NC |
2483 | Elf_Internal_Shdr *symtab_hdr; |
2484 | struct elf_link_hash_entry **sym_hashes; | |
2485 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2486 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 2487 | Elf_Internal_Rela *rel; |
60f2e42e | 2488 | Elf_Internal_Rela *wrel; |
8d88c4ca | 2489 | Elf_Internal_Rela *relend; |
38b12349 | 2490 | unsigned int plt_entry_size; |
8d88c4ca | 2491 | |
338c190a L |
2492 | /* Skip if check_relocs failed. */ |
2493 | if (input_section->check_relocs_failed) | |
2494 | return FALSE; | |
2495 | ||
0afcef53 | 2496 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
2497 | if (htab == NULL) |
2498 | return FALSE; | |
fe53b4a4 L |
2499 | |
2500 | BFD_ASSERT (is_x86_elf (input_bfd, htab)); | |
2501 | ||
765e526c | 2502 | plt_entry_size = htab->plt.plt_entry_size; |
0ffa91dd | 2503 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
2504 | sym_hashes = elf_sym_hashes (input_bfd); |
2505 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
0afcef53 | 2506 | local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 2507 | |
0afcef53 | 2508 | _bfd_x86_elf_set_tls_module_base (info); |
9f03412a | 2509 | |
60f2e42e | 2510 | rel = wrel = relocs; |
8d88c4ca | 2511 | relend = relocs + input_section->reloc_count; |
60f2e42e | 2512 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 2513 | { |
bffbf940 | 2514 | unsigned int r_type; |
8d88c4ca NC |
2515 | reloc_howto_type *howto; |
2516 | unsigned long r_symndx; | |
2517 | struct elf_link_hash_entry *h; | |
0afcef53 | 2518 | struct elf_x86_link_hash_entry *eh; |
8d88c4ca NC |
2519 | Elf_Internal_Sym *sym; |
2520 | asection *sec; | |
0ff2b86e | 2521 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 2522 | bfd_vma relocation; |
b34976b6 | 2523 | bfd_boolean unresolved_reloc; |
8d88c4ca | 2524 | bfd_reloc_status_type r; |
bffbf940 | 2525 | int tls_type; |
0ff2b86e | 2526 | asection *base_got, *resolved_plt; |
1788fc08 | 2527 | bfd_vma st_size; |
aec6b87e | 2528 | bfd_boolean resolved_to_zero; |
9e9821dd | 2529 | bfd_boolean relative_reloc; |
8d88c4ca | 2530 | |
351f65ca | 2531 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
2532 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
2533 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
2534 | { |
2535 | if (wrel != rel) | |
2536 | *wrel = *rel; | |
2537 | continue; | |
2538 | } | |
8d88c4ca | 2539 | |
9911c0fc | 2540 | if (r_type >= (int) R_X86_64_standard) |
47aeb64c | 2541 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
8d88c4ca | 2542 | |
d7921315 | 2543 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 2544 | || ABI_64_P (output_bfd)) |
d7921315 L |
2545 | howto = x86_64_elf_howto_table + r_type; |
2546 | else | |
2547 | howto = (x86_64_elf_howto_table | |
2548 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 2549 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
2550 | h = NULL; |
2551 | sym = NULL; | |
2552 | sec = NULL; | |
b34976b6 | 2553 | unresolved_reloc = FALSE; |
8d88c4ca | 2554 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
2555 | { |
2556 | sym = local_syms + r_symndx; | |
2557 | sec = local_sections[r_symndx]; | |
c434dee6 | 2558 | |
c25bc9fc L |
2559 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
2560 | &sec, rel); | |
1788fc08 | 2561 | st_size = sym->st_size; |
c25bc9fc L |
2562 | |
2563 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 2564 | if (!bfd_link_relocatable (info) |
351f65ca | 2565 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 2566 | { |
0afcef53 L |
2567 | h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, |
2568 | rel, FALSE); | |
c25bc9fc L |
2569 | if (h == NULL) |
2570 | abort (); | |
2571 | ||
eed180f8 | 2572 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
2573 | h->root.u.def.value = sym->st_value; |
2574 | h->root.u.def.section = sec; | |
2575 | } | |
8da6118f | 2576 | } |
8d88c4ca | 2577 | else |
8da6118f | 2578 | { |
c9736ba0 | 2579 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 2580 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
c434dee6 | 2581 | |
b2a8e766 AM |
2582 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2583 | r_symndx, symtab_hdr, sym_hashes, | |
2584 | h, sec, relocation, | |
62d887d4 | 2585 | unresolved_reloc, warned, ignored); |
1788fc08 | 2586 | st_size = h->size; |
8da6118f | 2587 | } |
ab96bf03 | 2588 | |
dbaa2011 | 2589 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
2590 | { |
2591 | _bfd_clear_contents (howto, input_bfd, input_section, | |
2592 | contents + rel->r_offset); | |
2593 | wrel->r_offset = rel->r_offset; | |
2594 | wrel->r_info = 0; | |
2595 | wrel->r_addend = 0; | |
2596 | ||
2597 | /* For ld -r, remove relocations in debug sections against | |
2598 | sections defined in discarded sections. Not done for | |
2599 | eh_frame editing code expects to be present. */ | |
2600 | if (bfd_link_relocatable (info) | |
2601 | && (input_section->flags & SEC_DEBUGGING)) | |
2602 | wrel--; | |
2603 | ||
2604 | continue; | |
2605 | } | |
ab96bf03 | 2606 | |
0e1862bb | 2607 | if (bfd_link_relocatable (info)) |
2d5da473 L |
2608 | { |
2609 | if (wrel != rel) | |
2610 | *wrel = *rel; | |
2611 | continue; | |
2612 | } | |
ab96bf03 | 2613 | |
1788fc08 | 2614 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 2615 | { |
1788fc08 L |
2616 | if (r_type == R_X86_64_64) |
2617 | { | |
2618 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
2619 | zero-extend it to 64bit if addend is zero. */ | |
2620 | r_type = R_X86_64_32; | |
2621 | memset (contents + rel->r_offset + 4, 0, 4); | |
2622 | } | |
2623 | else if (r_type == R_X86_64_SIZE64) | |
2624 | { | |
2625 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
2626 | zero-extend it to 64bit if addend is zero. */ | |
2627 | r_type = R_X86_64_SIZE32; | |
2628 | memset (contents + rel->r_offset + 4, 0, 4); | |
2629 | } | |
64d25c44 L |
2630 | } |
2631 | ||
0afcef53 | 2632 | eh = (struct elf_x86_link_hash_entry *) h; |
0ff2b86e | 2633 | |
cbe950e9 L |
2634 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
2635 | it here if it is defined in a non-shared object. */ | |
2636 | if (h != NULL | |
2637 | && h->type == STT_GNU_IFUNC | |
2638 | && h->def_regular) | |
2639 | { | |
cbe950e9 | 2640 | bfd_vma plt_index; |
4c544807 | 2641 | const char *name; |
cbe950e9 | 2642 | |
97dc35c8 L |
2643 | if ((input_section->flags & SEC_ALLOC) == 0) |
2644 | { | |
2645 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
2646 | sections because such sections are not SEC_ALLOC and | |
2647 | thus ld.so will not process them. */ | |
2648 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 2649 | continue; |
97dc35c8 L |
2650 | abort (); |
2651 | } | |
233cc9c1 L |
2652 | |
2653 | switch (r_type) | |
2654 | { | |
2655 | default: | |
2656 | break; | |
2657 | ||
2658 | case R_X86_64_GOTPCREL: | |
2659 | case R_X86_64_GOTPCRELX: | |
2660 | case R_X86_64_REX_GOTPCRELX: | |
2661 | case R_X86_64_GOTPCREL64: | |
2662 | base_got = htab->elf.sgot; | |
2663 | off = h->got.offset; | |
2664 | ||
2665 | if (base_got == NULL) | |
2666 | abort (); | |
2667 | ||
2668 | if (off == (bfd_vma) -1) | |
2669 | { | |
2670 | /* We can't use h->got.offset here to save state, or | |
2671 | even just remember the offset, as finish_dynamic_symbol | |
2672 | would use that as offset into .got. */ | |
2673 | ||
2674 | if (h->plt.offset == (bfd_vma) -1) | |
2675 | abort (); | |
2676 | ||
2677 | if (htab->elf.splt != NULL) | |
2678 | { | |
38b12349 | 2679 | plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2680 | - htab->plt.has_plt0); |
233cc9c1 L |
2681 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
2682 | base_got = htab->elf.sgotplt; | |
2683 | } | |
2684 | else | |
2685 | { | |
2686 | plt_index = h->plt.offset / plt_entry_size; | |
2687 | off = plt_index * GOT_ENTRY_SIZE; | |
2688 | base_got = htab->elf.igotplt; | |
2689 | } | |
2690 | ||
2691 | if (h->dynindx == -1 | |
2692 | || h->forced_local | |
2693 | || info->symbolic) | |
2694 | { | |
2695 | /* This references the local defitionion. We must | |
2696 | initialize this entry in the global offset table. | |
2697 | Since the offset must always be a multiple of 8, | |
2698 | we use the least significant bit to record | |
2699 | whether we have initialized it already. | |
2700 | ||
2701 | When doing a dynamic link, we create a .rela.got | |
2702 | relocation entry to initialize the value. This | |
2703 | is done in the finish_dynamic_symbol routine. */ | |
2704 | if ((off & 1) != 0) | |
2705 | off &= ~1; | |
2706 | else | |
2707 | { | |
2708 | bfd_put_64 (output_bfd, relocation, | |
2709 | base_got->contents + off); | |
2710 | /* Note that this is harmless for the GOTPLT64 | |
2711 | case, as -1 | 1 still is -1. */ | |
2712 | h->got.offset |= 1; | |
2713 | } | |
2714 | } | |
2715 | } | |
2716 | ||
2717 | relocation = (base_got->output_section->vma | |
2718 | + base_got->output_offset + off); | |
2719 | ||
2720 | goto do_relocation; | |
2721 | } | |
2722 | ||
2723 | if (h->plt.offset == (bfd_vma) -1) | |
2724 | { | |
2725 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
2726 | if (r_type == htab->pointer_r_type | |
2727 | && (input_section->flags & SEC_CODE) == 0) | |
2728 | goto do_ifunc_pointer; | |
2729 | goto bad_ifunc_reloc; | |
2730 | } | |
cbe950e9 L |
2731 | |
2732 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
2733 | if (htab->elf.splt != NULL) |
2734 | { | |
f2c29a16 | 2735 | if (htab->plt_second != NULL) |
0ff2b86e | 2736 | { |
f2c29a16 L |
2737 | resolved_plt = htab->plt_second; |
2738 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
2739 | } |
2740 | else | |
2741 | { | |
2742 | resolved_plt = htab->elf.splt; | |
2743 | plt_offset = h->plt.offset; | |
2744 | } | |
2745 | } | |
2746 | else | |
2747 | { | |
2748 | resolved_plt = htab->elf.iplt; | |
2749 | plt_offset = h->plt.offset; | |
2750 | } | |
2751 | ||
2752 | relocation = (resolved_plt->output_section->vma | |
2753 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
2754 | |
2755 | switch (r_type) | |
2756 | { | |
2757 | default: | |
233cc9c1 | 2758 | bad_ifunc_reloc: |
4c544807 L |
2759 | if (h->root.root.string) |
2760 | name = h->root.root.string; | |
2761 | else | |
2762 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
2763 | NULL); | |
4eca0228 | 2764 | _bfd_error_handler |
695344c0 | 2765 | /* xgettext:c-format */ |
cbe950e9 | 2766 | (_("%B: relocation %s against STT_GNU_IFUNC " |
233cc9c1 L |
2767 | "symbol `%s' isn't supported"), input_bfd, |
2768 | howto->name, name); | |
cbe950e9 L |
2769 | bfd_set_error (bfd_error_bad_value); |
2770 | return FALSE; | |
2771 | ||
2772 | case R_X86_64_32S: | |
0e1862bb | 2773 | if (bfd_link_pic (info)) |
cbe950e9 | 2774 | abort (); |
710ab287 L |
2775 | goto do_relocation; |
2776 | ||
248775ba L |
2777 | case R_X86_64_32: |
2778 | if (ABI_64_P (output_bfd)) | |
2779 | goto do_relocation; | |
17672001 | 2780 | /* FALLTHROUGH */ |
eed180f8 | 2781 | case R_X86_64_64: |
233cc9c1 | 2782 | do_ifunc_pointer: |
710ab287 L |
2783 | if (rel->r_addend != 0) |
2784 | { | |
4c544807 L |
2785 | if (h->root.root.string) |
2786 | name = h->root.root.string; | |
2787 | else | |
2788 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
2789 | sym, NULL); | |
4eca0228 | 2790 | _bfd_error_handler |
695344c0 | 2791 | /* xgettext:c-format */ |
710ab287 | 2792 | (_("%B: relocation %s against STT_GNU_IFUNC " |
d42c267e | 2793 | "symbol `%s' has non-zero addend: %Ld"), |
ef77d6af | 2794 | input_bfd, howto->name, name, rel->r_addend); |
710ab287 L |
2795 | bfd_set_error (bfd_error_bad_value); |
2796 | return FALSE; | |
2797 | } | |
2798 | ||
2799 | /* Generate dynamic relcoation only when there is a | |
233cc9c1 L |
2800 | non-GOT reference in a shared object or there is no |
2801 | PLT. */ | |
2802 | if ((bfd_link_pic (info) && h->non_got_ref) | |
2803 | || h->plt.offset == (bfd_vma) -1) | |
710ab287 L |
2804 | { |
2805 | Elf_Internal_Rela outrel; | |
710ab287 L |
2806 | asection *sreloc; |
2807 | ||
c25bc9fc L |
2808 | /* Need a dynamic relocation to get the real function |
2809 | address. */ | |
710ab287 L |
2810 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
2811 | info, | |
2812 | input_section, | |
2813 | rel->r_offset); | |
2814 | if (outrel.r_offset == (bfd_vma) -1 | |
2815 | || outrel.r_offset == (bfd_vma) -2) | |
2816 | abort (); | |
2817 | ||
2818 | outrel.r_offset += (input_section->output_section->vma | |
2819 | + input_section->output_offset); | |
2820 | ||
2821 | if (h->dynindx == -1 | |
44c4ea11 | 2822 | || h->forced_local |
0e1862bb | 2823 | || bfd_link_executable (info)) |
710ab287 | 2824 | { |
6322e5c5 L |
2825 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
2826 | h->root.root.string, | |
2827 | h->root.u.def.section->owner); | |
2828 | ||
710ab287 | 2829 | /* This symbol is resolved locally. */ |
56b8aada L |
2830 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
2831 | outrel.r_addend = (h->root.u.def.value | |
2832 | + h->root.u.def.section->output_section->vma | |
2833 | + h->root.u.def.section->output_offset); | |
710ab287 L |
2834 | } |
2835 | else | |
2836 | { | |
351f65ca | 2837 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
2838 | outrel.r_addend = 0; |
2839 | } | |
2840 | ||
233cc9c1 L |
2841 | /* Dynamic relocations are stored in |
2842 | 1. .rela.ifunc section in PIC object. | |
2843 | 2. .rela.got section in dynamic executable. | |
2844 | 3. .rela.iplt section in static executable. */ | |
2845 | if (bfd_link_pic (info)) | |
2846 | sreloc = htab->elf.irelifunc; | |
2847 | else if (htab->elf.splt != NULL) | |
2848 | sreloc = htab->elf.srelgot; | |
2849 | else | |
2850 | sreloc = htab->elf.irelplt; | |
351f65ca | 2851 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
2852 | |
2853 | /* If this reloc is against an external symbol, we | |
2854 | do not want to fiddle with the addend. Otherwise, | |
2855 | we need to include the symbol value so that it | |
2856 | becomes an addend for the dynamic reloc. For an | |
2857 | internal symbol, we have updated addend. */ | |
56b8aada | 2858 | continue; |
710ab287 | 2859 | } |
17672001 | 2860 | /* FALLTHROUGH */ |
cbe950e9 | 2861 | case R_X86_64_PC32: |
c3320543 | 2862 | case R_X86_64_PC32_BND: |
cbe950e9 L |
2863 | case R_X86_64_PC64: |
2864 | case R_X86_64_PLT32: | |
c3320543 | 2865 | case R_X86_64_PLT32_BND: |
cbe950e9 | 2866 | goto do_relocation; |
cbe950e9 L |
2867 | } |
2868 | } | |
2869 | ||
aec6b87e | 2870 | resolved_to_zero = (eh != NULL |
e62b9723 | 2871 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
0afcef53 | 2872 | X86_64_ELF_DATA, |
e62b9723 L |
2873 | eh->has_got_reloc, |
2874 | eh)); | |
aec6b87e | 2875 | |
70256ad8 AJ |
2876 | /* When generating a shared object, the relocations handled here are |
2877 | copied into the output file to be resolved at run time. */ | |
2878 | switch (r_type) | |
2879 | { | |
2880 | case R_X86_64_GOT32: | |
7b81dfbb | 2881 | case R_X86_64_GOT64: |
70256ad8 AJ |
2882 | /* Relocation is to the entry for this symbol in the global |
2883 | offset table. */ | |
70256ad8 | 2884 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
2885 | case R_X86_64_GOTPCRELX: |
2886 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
2887 | case R_X86_64_GOTPCREL64: |
2888 | /* Use global offset table entry as symbol value. */ | |
2889 | case R_X86_64_GOTPLT64: | |
de194d85 | 2890 | /* This is obsolete and treated the same as GOT64. */ |
6de2ae4a | 2891 | base_got = htab->elf.sgot; |
7b81dfbb | 2892 | |
6de2ae4a | 2893 | if (htab->elf.sgot == NULL) |
c434dee6 | 2894 | abort (); |
053579d7 | 2895 | |
9e9821dd | 2896 | relative_reloc = FALSE; |
51e0a107 | 2897 | if (h != NULL) |
70256ad8 | 2898 | { |
b34976b6 | 2899 | bfd_boolean dyn; |
c434dee6 AJ |
2900 | |
2901 | off = h->got.offset; | |
7b81dfbb | 2902 | if (h->needs_plt |
eed180f8 | 2903 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
2904 | && off == (bfd_vma)-1) |
2905 | { | |
2906 | /* We can't use h->got.offset here to save | |
2907 | state, or even just remember the offset, as | |
2908 | finish_dynamic_symbol would use that as offset into | |
2909 | .got. */ | |
38b12349 | 2910 | bfd_vma plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2911 | - htab->plt.has_plt0); |
7b81dfbb | 2912 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 2913 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
2914 | } |
2915 | ||
c434dee6 | 2916 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 2917 | |
0e1862bb L |
2918 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
2919 | || (bfd_link_pic (info) | |
27482721 | 2920 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
2921 | || (ELF_ST_VISIBILITY (h->other) |
2922 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
2923 | { |
2924 | /* This is actually a static link, or it is a -Bsymbolic | |
2925 | link and the symbol is defined locally, or the symbol | |
407443a3 | 2926 | was forced to be local because of a version file. We |
51e0a107 JH |
2927 | must initialize this entry in the global offset table. |
2928 | Since the offset must always be a multiple of 8, we | |
2929 | use the least significant bit to record whether we | |
2930 | have initialized it already. | |
2931 | ||
2932 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
2933 | relocation entry to initialize the value. This is |
2934 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
2935 | if ((off & 1) != 0) |
2936 | off &= ~1; | |
2937 | else | |
2938 | { | |
2939 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
2940 | base_got->contents + off); |
2941 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 2942 | as -1 | 1 still is -1. */ |
51e0a107 | 2943 | h->got.offset |= 1; |
9e9821dd L |
2944 | |
2945 | if (h->dynindx == -1 | |
2946 | && !h->forced_local | |
2947 | && h->root.type != bfd_link_hash_undefweak | |
2948 | && bfd_link_pic (info)) | |
2949 | { | |
2950 | /* If this symbol isn't dynamic in PIC, | |
2951 | generate R_X86_64_RELATIVE here. */ | |
2952 | eh->no_finish_dynamic_symbol = 1; | |
2953 | relative_reloc = TRUE; | |
2954 | } | |
51e0a107 JH |
2955 | } |
2956 | } | |
053579d7 | 2957 | else |
b34976b6 | 2958 | unresolved_reloc = FALSE; |
70256ad8 | 2959 | } |
51e0a107 JH |
2960 | else |
2961 | { | |
c434dee6 AJ |
2962 | if (local_got_offsets == NULL) |
2963 | abort (); | |
51e0a107 JH |
2964 | |
2965 | off = local_got_offsets[r_symndx]; | |
2966 | ||
2967 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
2968 | the least significant bit to record whether we have |
2969 | already generated the necessary reloc. */ | |
51e0a107 JH |
2970 | if ((off & 1) != 0) |
2971 | off &= ~1; | |
2972 | else | |
2973 | { | |
c434dee6 | 2974 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 2975 | base_got->contents + off); |
9e9821dd | 2976 | local_got_offsets[r_symndx] |= 1; |
51e0a107 | 2977 | |
0e1862bb | 2978 | if (bfd_link_pic (info)) |
9e9821dd | 2979 | relative_reloc = TRUE; |
51e0a107 | 2980 | } |
51e0a107 | 2981 | } |
6a2bda3f | 2982 | |
9e9821dd L |
2983 | if (relative_reloc) |
2984 | { | |
2985 | asection *s; | |
2986 | Elf_Internal_Rela outrel; | |
2987 | ||
2988 | /* We need to generate a R_X86_64_RELATIVE reloc | |
2989 | for the dynamic linker. */ | |
2990 | s = htab->elf.srelgot; | |
2991 | if (s == NULL) | |
2992 | abort (); | |
2993 | ||
2994 | outrel.r_offset = (base_got->output_section->vma | |
2995 | + base_got->output_offset | |
2996 | + off); | |
2997 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); | |
2998 | outrel.r_addend = relocation; | |
2999 | elf_append_rela (output_bfd, s, &outrel); | |
3000 | } | |
3001 | ||
c434dee6 AJ |
3002 | if (off >= (bfd_vma) -2) |
3003 | abort (); | |
3004 | ||
7b81dfbb AJ |
3005 | relocation = base_got->output_section->vma |
3006 | + base_got->output_offset + off; | |
56ceb5b5 L |
3007 | if (r_type != R_X86_64_GOTPCREL |
3008 | && r_type != R_X86_64_GOTPCRELX | |
3009 | && r_type != R_X86_64_REX_GOTPCRELX | |
3010 | && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
3011 | relocation -= htab->elf.sgotplt->output_section->vma |
3012 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 3013 | |
70256ad8 AJ |
3014 | break; |
3015 | ||
d6ab8113 JB |
3016 | case R_X86_64_GOTOFF64: |
3017 | /* Relocation is relative to the start of the global offset | |
3018 | table. */ | |
3019 | ||
3d949995 L |
3020 | /* Check to make sure it isn't a protected function or data |
3021 | symbol for shared library since it may not be local when | |
e3c0e327 L |
3022 | used as function address or with copy relocation. We also |
3023 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 3024 | if (bfd_link_pic (info) && h) |
d6ab8113 | 3025 | { |
e3c0e327 L |
3026 | if (!h->def_regular) |
3027 | { | |
3028 | const char *v; | |
3029 | ||
3030 | switch (ELF_ST_VISIBILITY (h->other)) | |
3031 | { | |
3032 | case STV_HIDDEN: | |
3033 | v = _("hidden symbol"); | |
3034 | break; | |
3035 | case STV_INTERNAL: | |
3036 | v = _("internal symbol"); | |
3037 | break; | |
3038 | case STV_PROTECTED: | |
3039 | v = _("protected symbol"); | |
3040 | break; | |
3041 | default: | |
3042 | v = _("symbol"); | |
3043 | break; | |
3044 | } | |
3045 | ||
4eca0228 | 3046 | _bfd_error_handler |
695344c0 | 3047 | /* xgettext:c-format */ |
63a5468a AM |
3048 | (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s" |
3049 | " `%s' can not be used when making a shared object"), | |
e3c0e327 L |
3050 | input_bfd, v, h->root.root.string); |
3051 | bfd_set_error (bfd_error_bad_value); | |
3052 | return FALSE; | |
3053 | } | |
0e1862bb | 3054 | else if (!bfd_link_executable (info) |
e3c0e327 L |
3055 | && !SYMBOL_REFERENCES_LOCAL (info, h) |
3056 | && (h->type == STT_FUNC | |
3057 | || h->type == STT_OBJECT) | |
3058 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
3059 | { | |
4eca0228 | 3060 | _bfd_error_handler |
695344c0 | 3061 | /* xgettext:c-format */ |
63a5468a AM |
3062 | (_("%B: relocation R_X86_64_GOTOFF64 against protected %s" |
3063 | " `%s' can not be used when making a shared object"), | |
e3c0e327 L |
3064 | input_bfd, |
3065 | h->type == STT_FUNC ? "function" : "data", | |
3066 | h->root.root.string); | |
3067 | bfd_set_error (bfd_error_bad_value); | |
d6ab8113 | 3068 | return FALSE; |
e3c0e327 | 3069 | } |
d6ab8113 JB |
3070 | } |
3071 | ||
3072 | /* Note that sgot is not involved in this | |
3073 | calculation. We always want the start of .got.plt. If we | |
3074 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
3075 | permitted by the ABI, we might have to change this | |
3076 | calculation. */ | |
6de2ae4a L |
3077 | relocation -= htab->elf.sgotplt->output_section->vma |
3078 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3079 | break; |
3080 | ||
3081 | case R_X86_64_GOTPC32: | |
7b81dfbb | 3082 | case R_X86_64_GOTPC64: |
d6ab8113 | 3083 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
3084 | relocation = htab->elf.sgotplt->output_section->vma |
3085 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3086 | unresolved_reloc = FALSE; |
3087 | break; | |
7b81dfbb AJ |
3088 | |
3089 | case R_X86_64_PLTOFF64: | |
3090 | /* Relocation is PLT entry relative to GOT. For local | |
3091 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 3092 | if (h != NULL |
7b81dfbb | 3093 | /* See PLT32 handling. */ |
9d734efa L |
3094 | && (h->plt.offset != (bfd_vma) -1 |
3095 | || eh->plt_got.offset != (bfd_vma) -1) | |
6de2ae4a | 3096 | && htab->elf.splt != NULL) |
7b81dfbb | 3097 | { |
9d734efa L |
3098 | if (eh->plt_got.offset != (bfd_vma) -1) |
3099 | { | |
3100 | /* Use the GOT PLT. */ | |
3101 | resolved_plt = htab->plt_got; | |
3102 | plt_offset = eh->plt_got.offset; | |
3103 | } | |
f2c29a16 | 3104 | else if (htab->plt_second != NULL) |
0ff2b86e | 3105 | { |
f2c29a16 L |
3106 | resolved_plt = htab->plt_second; |
3107 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
3108 | } |
3109 | else | |
3110 | { | |
3111 | resolved_plt = htab->elf.splt; | |
3112 | plt_offset = h->plt.offset; | |
3113 | } | |
3114 | ||
3115 | relocation = (resolved_plt->output_section->vma | |
3116 | + resolved_plt->output_offset | |
3117 | + plt_offset); | |
7b81dfbb AJ |
3118 | unresolved_reloc = FALSE; |
3119 | } | |
3120 | ||
6de2ae4a L |
3121 | relocation -= htab->elf.sgotplt->output_section->vma |
3122 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 3123 | break; |
d6ab8113 | 3124 | |
70256ad8 | 3125 | case R_X86_64_PLT32: |
c3320543 | 3126 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
3127 | /* Relocation is to the entry for this symbol in the |
3128 | procedure linkage table. */ | |
3129 | ||
3130 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 3131 | without using the procedure linkage table. */ |
70256ad8 AJ |
3132 | if (h == NULL) |
3133 | break; | |
3134 | ||
dd7e64d4 L |
3135 | if ((h->plt.offset == (bfd_vma) -1 |
3136 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 3137 | || htab->elf.splt == NULL) |
70256ad8 AJ |
3138 | { |
3139 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
3140 | happens when statically linking PIC code, or when |
3141 | using -Bsymbolic. */ | |
70256ad8 AJ |
3142 | break; |
3143 | } | |
3144 | ||
dd7e64d4 | 3145 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 3146 | { |
f2c29a16 | 3147 | if (htab->plt_second != NULL) |
dd7e64d4 | 3148 | { |
f2c29a16 L |
3149 | resolved_plt = htab->plt_second; |
3150 | plt_offset = eh->plt_second.offset; | |
dd7e64d4 L |
3151 | } |
3152 | else | |
3153 | { | |
3154 | resolved_plt = htab->elf.splt; | |
3155 | plt_offset = h->plt.offset; | |
3156 | } | |
0ff2b86e L |
3157 | } |
3158 | else | |
3159 | { | |
dd7e64d4 L |
3160 | /* Use the GOT PLT. */ |
3161 | resolved_plt = htab->plt_got; | |
3162 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
3163 | } |
3164 | ||
3165 | relocation = (resolved_plt->output_section->vma | |
3166 | + resolved_plt->output_offset | |
3167 | + plt_offset); | |
b34976b6 | 3168 | unresolved_reloc = FALSE; |
70256ad8 AJ |
3169 | break; |
3170 | ||
1788fc08 L |
3171 | case R_X86_64_SIZE32: |
3172 | case R_X86_64_SIZE64: | |
1788fc08 L |
3173 | /* Set to symbol size. */ |
3174 | relocation = st_size; | |
3175 | goto direct; | |
3176 | ||
fd8ab9e5 AJ |
3177 | case R_X86_64_PC8: |
3178 | case R_X86_64_PC16: | |
3179 | case R_X86_64_PC32: | |
c3320543 | 3180 | case R_X86_64_PC32_BND: |
6333bc0d | 3181 | /* Don't complain about -fPIC if the symbol is undefined when |
7073b5b9 L |
3182 | building executable unless it is unresolved weak symbol or |
3183 | -z nocopyreloc is used. */ | |
aec6b87e | 3184 | if ((input_section->flags & SEC_ALLOC) != 0 |
90f487df | 3185 | && (input_section->flags & SEC_READONLY) != 0 |
6333bc0d | 3186 | && h != NULL |
aec6b87e | 3187 | && ((bfd_link_executable (info) |
7073b5b9 L |
3188 | && ((h->root.type == bfd_link_hash_undefweak |
3189 | && !resolved_to_zero) | |
a5b4ee94 L |
3190 | || ((info->nocopyreloc |
3191 | || (eh->def_protected | |
3192 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
3193 | && h->def_dynamic |
3194 | && !(h->root.u.def.section->flags & SEC_CODE)))) | |
c5bb8910 | 3195 | || bfd_link_dll (info))) |
6610a52d | 3196 | { |
41bed6dd L |
3197 | bfd_boolean fail = FALSE; |
3198 | bfd_boolean branch | |
c3320543 L |
3199 | = ((r_type == R_X86_64_PC32 |
3200 | || r_type == R_X86_64_PC32_BND) | |
41bed6dd L |
3201 | && is_32bit_relative_branch (contents, rel->r_offset)); |
3202 | ||
3203 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
3204 | { | |
3205 | /* Symbol is referenced locally. Make sure it is | |
3206 | defined locally or for a branch. */ | |
8170f769 L |
3207 | fail = (!(h->def_regular || ELF_COMMON_DEF_P (h)) |
3208 | && !branch); | |
41bed6dd | 3209 | } |
aec6b87e | 3210 | else if (!(bfd_link_pie (info) |
bc696fd5 | 3211 | && (h->needs_copy || eh->needs_copy))) |
41bed6dd | 3212 | { |
9a926d55 L |
3213 | /* Symbol doesn't need copy reloc and isn't referenced |
3214 | locally. We only allow branch to symbol with | |
3215 | non-default visibility. */ | |
41bed6dd L |
3216 | fail = (!branch |
3217 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
3218 | } | |
3219 | ||
3220 | if (fail) | |
aab921ad | 3221 | return elf_x86_64_need_pic (info, input_bfd, input_section, |
338c190a | 3222 | h, NULL, NULL, howto); |
6610a52d L |
3223 | } |
3224 | /* Fall through. */ | |
3225 | ||
70256ad8 AJ |
3226 | case R_X86_64_8: |
3227 | case R_X86_64_16: | |
3228 | case R_X86_64_32: | |
d6ab8113 | 3229 | case R_X86_64_PC64: |
6b3db546 | 3230 | case R_X86_64_64: |
80643fbc | 3231 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 3232 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 3233 | |
1788fc08 | 3234 | direct: |
b1e24c02 | 3235 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
3236 | break; |
3237 | ||
9a926d55 | 3238 | /* Don't copy a pc-relative relocation into the output file |
6333bc0d | 3239 | if the symbol needs copy reloc or the symbol is undefined |
04ebc307 | 3240 | when building executable. Copy dynamic function pointer |
aec6b87e L |
3241 | relocations. Don't generate dynamic relocations against |
3242 | resolved undefined weak symbols in PIE. */ | |
0e1862bb | 3243 | if ((bfd_link_pic (info) |
aec6b87e | 3244 | && !(bfd_link_pie (info) |
fd9edc90 | 3245 | && h != NULL |
6333bc0d L |
3246 | && (h->needs_copy |
3247 | || eh->needs_copy | |
3248 | || h->root.type == bfd_link_hash_undefined) | |
d8457a04 L |
3249 | && (IS_X86_64_PCREL_TYPE (r_type) |
3250 | || r_type == R_X86_64_SIZE32 | |
3251 | || r_type == R_X86_64_SIZE64)) | |
4bc6e03a | 3252 | && (h == NULL |
aec6b87e L |
3253 | || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
3254 | && !resolved_to_zero) | |
3255 | || h->root.type != bfd_link_hash_undefweak)) | |
1788fc08 L |
3256 | && ((! IS_X86_64_PCREL_TYPE (r_type) |
3257 | && r_type != R_X86_64_SIZE32 | |
3258 | && r_type != R_X86_64_SIZE64) | |
d8045f23 | 3259 | || ! SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c | 3260 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 3261 | && !bfd_link_pic (info) |
c434dee6 AJ |
3262 | && h != NULL |
3263 | && h->dynindx != -1 | |
aec6b87e L |
3264 | && (!h->non_got_ref |
3265 | || eh->func_pointer_refcount > 0 | |
3266 | || (h->root.type == bfd_link_hash_undefweak | |
3267 | && !resolved_to_zero)) | |
bae420ef L |
3268 | && ((h->def_dynamic && !h->def_regular) |
3269 | /* Undefined weak symbol is bound locally when | |
3270 | PIC is false. */ | |
0f88be7a | 3271 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
3272 | { |
3273 | Elf_Internal_Rela outrel; | |
b34976b6 | 3274 | bfd_boolean skip, relocate; |
c434dee6 | 3275 | asection *sreloc; |
70256ad8 AJ |
3276 | |
3277 | /* When generating a shared object, these relocations | |
3278 | are copied into the output file to be resolved at run | |
407443a3 | 3279 | time. */ |
b34976b6 AM |
3280 | skip = FALSE; |
3281 | relocate = FALSE; | |
70256ad8 | 3282 | |
c629eae0 JJ |
3283 | outrel.r_offset = |
3284 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 3285 | rel->r_offset); |
c629eae0 | 3286 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 3287 | skip = TRUE; |
0fb19cbc | 3288 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 3289 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
3290 | |
3291 | outrel.r_offset += (input_section->output_section->vma | |
3292 | + input_section->output_offset); | |
3293 | ||
3294 | if (skip) | |
0bb2d96a | 3295 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 3296 | |
fd8ab9e5 AJ |
3297 | /* h->dynindx may be -1 if this symbol was marked to |
3298 | become local. */ | |
3299 | else if (h != NULL | |
c434dee6 | 3300 | && h->dynindx != -1 |
d8045f23 | 3301 | && (IS_X86_64_PCREL_TYPE (r_type) |
4e0c91e4 L |
3302 | || !(bfd_link_executable (info) |
3303 | || SYMBOLIC_BIND (info, h)) | |
d8045f23 | 3304 | || ! h->def_regular)) |
70256ad8 | 3305 | { |
351f65ca | 3306 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 3307 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
3308 | } |
3309 | else | |
3310 | { | |
4c10bbaa L |
3311 | /* This symbol is local, or marked to become local. |
3312 | When relocation overflow check is disabled, we | |
3313 | convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
3314 | if (r_type == htab->pointer_r_type | |
3315 | || (r_type == R_X86_64_32 | |
3316 | && info->no_reloc_overflow_check)) | |
607c0e09 | 3317 | { |
b34976b6 | 3318 | relocate = TRUE; |
351f65ca | 3319 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
3320 | outrel.r_addend = relocation + rel->r_addend; |
3321 | } | |
64d25c44 L |
3322 | else if (r_type == R_X86_64_64 |
3323 | && !ABI_64_P (output_bfd)) | |
3324 | { | |
3325 | relocate = TRUE; | |
3326 | outrel.r_info = htab->r_info (0, | |
3327 | R_X86_64_RELATIVE64); | |
3328 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
3329 | /* Check addend overflow. */ |
3330 | if ((outrel.r_addend & 0x80000000) | |
3331 | != (rel->r_addend & 0x80000000)) | |
3332 | { | |
3333 | const char *name; | |
268a8d3a | 3334 | int addend = rel->r_addend; |
8cf0d2dd L |
3335 | if (h && h->root.root.string) |
3336 | name = h->root.root.string; | |
3337 | else | |
3338 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3339 | sym, NULL); | |
d42c267e AM |
3340 | _bfd_error_handler |
3341 | /* xgettext:c-format */ | |
3342 | (_("%B: addend %s%#x in relocation %s against " | |
3343 | "symbol `%s' at %#Lx in section `%A' is " | |
3344 | "out of range"), | |
3345 | input_bfd, addend < 0 ? "-" : "", addend, | |
3346 | howto->name, name, rel->r_offset, input_section); | |
8cf0d2dd L |
3347 | bfd_set_error (bfd_error_bad_value); |
3348 | return FALSE; | |
3349 | } | |
64d25c44 | 3350 | } |
607c0e09 AS |
3351 | else |
3352 | { | |
3353 | long sindx; | |
3354 | ||
8517fae7 | 3355 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
3356 | sindx = 0; |
3357 | else if (sec == NULL || sec->owner == NULL) | |
3358 | { | |
3359 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3360 | return FALSE; |
607c0e09 AS |
3361 | } |
3362 | else | |
3363 | { | |
3364 | asection *osec; | |
3365 | ||
74541ad4 AM |
3366 | /* We are turning this relocation into one |
3367 | against a section symbol. It would be | |
3368 | proper to subtract the symbol's value, | |
3369 | osec->vma, from the emitted reloc addend, | |
3370 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
3371 | osec = sec->output_section; |
3372 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
3373 | if (sindx == 0) |
3374 | { | |
3375 | asection *oi = htab->elf.text_index_section; | |
3376 | sindx = elf_section_data (oi)->dynindx; | |
3377 | } | |
3378 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
3379 | } |
3380 | ||
351f65ca | 3381 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
3382 | outrel.r_addend = relocation + rel->r_addend; |
3383 | } | |
70256ad8 AJ |
3384 | } |
3385 | ||
cbe950e9 | 3386 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 3387 | |
62d78908 L |
3388 | if (sreloc == NULL || sreloc->contents == NULL) |
3389 | { | |
3390 | r = bfd_reloc_notsupported; | |
3391 | goto check_relocation_error; | |
3392 | } | |
c434dee6 | 3393 | |
351f65ca | 3394 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
3395 | |
3396 | /* If this reloc is against an external symbol, we do | |
3397 | not want to fiddle with the addend. Otherwise, we | |
3398 | need to include the symbol value so that it becomes | |
3399 | an addend for the dynamic reloc. */ | |
0f88be7a | 3400 | if (! relocate) |
70256ad8 AJ |
3401 | continue; |
3402 | } | |
3403 | ||
3404 | break; | |
3405 | ||
bffbf940 | 3406 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
3407 | case R_X86_64_GOTPC32_TLSDESC: |
3408 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 3409 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
3410 | tls_type = GOT_UNKNOWN; |
3411 | if (h == NULL && local_got_offsets) | |
0afcef53 | 3412 | tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 3413 | else if (h != NULL) |
0afcef53 | 3414 | tls_type = elf_x86_hash_entry (h)->tls_type; |
142411ca | 3415 | |
351f65ca L |
3416 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3417 | input_section, contents, | |
3418 | symtab_hdr, sym_hashes, | |
3419 | &r_type, tls_type, rel, | |
bedfd056 | 3420 | relend, h, r_symndx, TRUE)) |
534a31f6 | 3421 | return FALSE; |
bffbf940 JJ |
3422 | |
3423 | if (r_type == R_X86_64_TPOFF32) | |
3424 | { | |
142411ca L |
3425 | bfd_vma roff = rel->r_offset; |
3426 | ||
bffbf940 | 3427 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 3428 | |
351f65ca | 3429 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 3430 | { |
52bc799a | 3431 | /* GD->LE transition. For 64bit, change |
e2cbcd91 L |
3432 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3433 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3434 | or | |
3435 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3436 | .byte 0x66; rex64 | |
3437 | call *__tls_get_addr@GOTPCREL(%rip) | |
3438 | which may be converted to | |
3439 | addr32 call __tls_get_addr | |
52bc799a | 3440 | into: |
e2cbcd91 L |
3441 | movq %fs:0, %rax |
3442 | leaq foo@tpoff(%rax), %rax | |
52bc799a | 3443 | For 32bit, change |
e2cbcd91 L |
3444 | leaq foo@tlsgd(%rip), %rdi |
3445 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3446 | or | |
3447 | leaq foo@tlsgd(%rip), %rdi | |
3448 | .byte 0x66; rex64 | |
3449 | call *__tls_get_addr@GOTPCREL(%rip) | |
3450 | which may be converted to | |
3451 | addr32 call __tls_get_addr | |
52bc799a | 3452 | into: |
e2cbcd91 L |
3453 | movl %fs:0, %eax |
3454 | leaq foo@tpoff(%rax), %rax | |
5c98a14e | 3455 | For largepic, change: |
e2cbcd91 L |
3456 | leaq foo@tlsgd(%rip), %rdi |
3457 | movabsq $__tls_get_addr@pltoff, %rax | |
3458 | addq %r15, %rax | |
3459 | call *%rax | |
5c98a14e | 3460 | into: |
e2cbcd91 L |
3461 | movq %fs:0, %rax |
3462 | leaq foo@tpoff(%rax), %rax | |
3463 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 3464 | int largepic = 0; |
e2cbcd91 | 3465 | if (ABI_64_P (output_bfd)) |
5c98a14e | 3466 | { |
e2cbcd91 L |
3467 | if (contents[roff + 5] == 0xb8) |
3468 | { | |
3469 | memcpy (contents + roff - 3, | |
3470 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
3471 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
3472 | largepic = 1; | |
3473 | } | |
3474 | else | |
3475 | memcpy (contents + roff - 4, | |
3476 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3477 | 16); | |
5c98a14e | 3478 | } |
52bc799a L |
3479 | else |
3480 | memcpy (contents + roff - 3, | |
3481 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3482 | 15); | |
eb4ff4d6 | 3483 | bfd_put_32 (output_bfd, |
351f65ca | 3484 | elf_x86_64_tpoff (info, relocation), |
5c98a14e | 3485 | contents + roff + 8 + largepic); |
e2cbcd91 L |
3486 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, |
3487 | R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */ | |
bffbf940 | 3488 | rel++; |
60f2e42e | 3489 | wrel++; |
bffbf940 JJ |
3490 | continue; |
3491 | } | |
351f65ca | 3492 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
3493 | { |
3494 | /* GDesc -> LE transition. | |
3495 | It's originally something like: | |
3496 | leaq x@tlsdesc(%rip), %rax | |
3497 | ||
3498 | Change it to: | |
c9736ba0 | 3499 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 3500 | |
c9736ba0 | 3501 | unsigned int val, type; |
67a4f2b7 | 3502 | |
67a4f2b7 | 3503 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 3504 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
3505 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
3506 | contents + roff - 3); | |
3507 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
3508 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3509 | contents + roff - 1); | |
eb4ff4d6 | 3510 | bfd_put_32 (output_bfd, |
351f65ca | 3511 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
3512 | contents + roff); |
3513 | continue; | |
3514 | } | |
351f65ca | 3515 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
3516 | { |
3517 | /* GDesc -> LE transition. | |
3518 | It's originally: | |
3519 | call *(%rax) | |
3520 | Turn it into: | |
142411ca | 3521 | xchg %ax,%ax. */ |
10efb593 | 3522 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
3523 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3524 | continue; | |
3525 | } | |
351f65ca | 3526 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 3527 | { |
bffbf940 | 3528 | /* IE->LE transition: |
cf61b747 | 3529 | For 64bit, originally it can be one of: |
bffbf940 JJ |
3530 | movq foo@gottpoff(%rip), %reg |
3531 | addq foo@gottpoff(%rip), %reg | |
3532 | We change it into: | |
3533 | movq $foo, %reg | |
3534 | leaq foo(%reg), %reg | |
cf61b747 L |
3535 | addq $foo, %reg. |
3536 | For 32bit, originally it can be one of: | |
3537 | movq foo@gottpoff(%rip), %reg | |
3538 | addl foo@gottpoff(%rip), %reg | |
3539 | We change it into: | |
3540 | movq $foo, %reg | |
3541 | leal foo(%reg), %reg | |
3542 | addl $foo, %reg. */ | |
142411ca L |
3543 | |
3544 | unsigned int val, type, reg; | |
3545 | ||
cf61b747 L |
3546 | if (roff >= 3) |
3547 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
3548 | else | |
3549 | val = 0; | |
142411ca L |
3550 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
3551 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 3552 | reg >>= 3; |
bffbf940 JJ |
3553 | if (type == 0x8b) |
3554 | { | |
3555 | /* movq */ | |
3556 | if (val == 0x4c) | |
3557 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3558 | contents + roff - 3); |
4a4c5f25 L |
3559 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3560 | bfd_put_8 (output_bfd, 0x41, | |
3561 | contents + roff - 3); | |
bffbf940 | 3562 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 3563 | contents + roff - 2); |
bffbf940 | 3564 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3565 | contents + roff - 1); |
bffbf940 JJ |
3566 | } |
3567 | else if (reg == 4) | |
3568 | { | |
cf61b747 L |
3569 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
3570 | is special */ | |
bffbf940 JJ |
3571 | if (val == 0x4c) |
3572 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3573 | contents + roff - 3); |
4a4c5f25 L |
3574 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3575 | bfd_put_8 (output_bfd, 0x41, | |
3576 | contents + roff - 3); | |
bffbf940 | 3577 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 3578 | contents + roff - 2); |
bffbf940 | 3579 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3580 | contents + roff - 1); |
bffbf940 JJ |
3581 | } |
3582 | else | |
3583 | { | |
cf61b747 | 3584 | /* addq/addl -> leaq/leal */ |
bffbf940 JJ |
3585 | if (val == 0x4c) |
3586 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 3587 | contents + roff - 3); |
4a4c5f25 L |
3588 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3589 | bfd_put_8 (output_bfd, 0x45, | |
3590 | contents + roff - 3); | |
bffbf940 | 3591 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 3592 | contents + roff - 2); |
bffbf940 | 3593 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 3594 | contents + roff - 1); |
bffbf940 | 3595 | } |
eb4ff4d6 | 3596 | bfd_put_32 (output_bfd, |
351f65ca | 3597 | elf_x86_64_tpoff (info, relocation), |
142411ca | 3598 | contents + roff); |
bffbf940 JJ |
3599 | continue; |
3600 | } | |
142411ca L |
3601 | else |
3602 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
3603 | } |
3604 | ||
6de2ae4a | 3605 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3606 | abort (); |
3607 | ||
3608 | if (h != NULL) | |
67a4f2b7 AO |
3609 | { |
3610 | off = h->got.offset; | |
0afcef53 | 3611 | offplt = elf_x86_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 3612 | } |
bffbf940 JJ |
3613 | else |
3614 | { | |
3615 | if (local_got_offsets == NULL) | |
3616 | abort (); | |
3617 | ||
3618 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 3619 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
3620 | } |
3621 | ||
3622 | if ((off & 1) != 0) | |
3623 | off &= ~1; | |
26e41594 | 3624 | else |
bffbf940 JJ |
3625 | { |
3626 | Elf_Internal_Rela outrel; | |
bffbf940 | 3627 | int dr_type, indx; |
67a4f2b7 | 3628 | asection *sreloc; |
bffbf940 | 3629 | |
6de2ae4a | 3630 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3631 | abort (); |
3632 | ||
67a4f2b7 AO |
3633 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3634 | ||
3635 | if (GOT_TLS_GDESC_P (tls_type)) | |
3636 | { | |
351f65ca | 3637 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 3638 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
3639 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
3640 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
3641 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3642 | + offplt |
3643 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 3644 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 3645 | if (indx == 0) |
0afcef53 | 3646 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
67a4f2b7 AO |
3647 | else |
3648 | outrel.r_addend = 0; | |
351f65ca | 3649 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
3650 | } |
3651 | ||
6de2ae4a | 3652 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 3653 | |
6de2ae4a L |
3654 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3655 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 3656 | |
67a4f2b7 | 3657 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 3658 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
3659 | else if (GOT_TLS_GDESC_P (tls_type)) |
3660 | goto dr_done; | |
bffbf940 JJ |
3661 | else |
3662 | dr_type = R_X86_64_TPOFF64; | |
3663 | ||
6de2ae4a | 3664 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 3665 | outrel.r_addend = 0; |
67a4f2b7 AO |
3666 | if ((dr_type == R_X86_64_TPOFF64 |
3667 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
0afcef53 | 3668 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
351f65ca | 3669 | outrel.r_info = htab->r_info (indx, dr_type); |
bffbf940 | 3670 | |
351f65ca | 3671 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 3672 | |
67a4f2b7 | 3673 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
3674 | { |
3675 | if (indx == 0) | |
3676 | { | |
d40d037c | 3677 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 3678 | bfd_put_64 (output_bfd, |
0afcef53 | 3679 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3680 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
3681 | } |
3682 | else | |
3683 | { | |
3684 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3685 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 3686 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
3687 | R_X86_64_DTPOFF64); |
3688 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 3689 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 3690 | &outrel); |
bffbf940 JJ |
3691 | } |
3692 | } | |
3693 | ||
67a4f2b7 | 3694 | dr_done: |
bffbf940 JJ |
3695 | if (h != NULL) |
3696 | h->got.offset |= 1; | |
3697 | else | |
3698 | local_got_offsets[r_symndx] |= 1; | |
3699 | } | |
3700 | ||
67a4f2b7 AO |
3701 | if (off >= (bfd_vma) -2 |
3702 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 3703 | abort (); |
351f65ca | 3704 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 3705 | { |
67a4f2b7 AO |
3706 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
3707 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
3708 | relocation = htab->elf.sgotplt->output_section->vma |
3709 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3710 | + offplt + htab->sgotplt_jump_table_size; |
3711 | else | |
6de2ae4a L |
3712 | relocation = htab->elf.sgot->output_section->vma |
3713 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3714 | unresolved_reloc = FALSE; |
bffbf940 | 3715 | } |
142411ca | 3716 | else |
67a4f2b7 | 3717 | { |
142411ca | 3718 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 3719 | |
351f65ca | 3720 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 3721 | { |
52bc799a | 3722 | /* GD->IE transition. For 64bit, change |
e2cbcd91 L |
3723 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3724 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3725 | or | |
3726 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3727 | .byte 0x66; rex64 | |
3728 | call *__tls_get_addr@GOTPCREL(%rip | |
3729 | which may be converted to | |
3730 | addr32 call __tls_get_addr | |
52bc799a | 3731 | into: |
e2cbcd91 L |
3732 | movq %fs:0, %rax |
3733 | addq foo@gottpoff(%rip), %rax | |
52bc799a | 3734 | For 32bit, change |
e2cbcd91 L |
3735 | leaq foo@tlsgd(%rip), %rdi |
3736 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3737 | or | |
3738 | leaq foo@tlsgd(%rip), %rdi | |
3739 | .byte 0x66; rex64; | |
3740 | call *__tls_get_addr@GOTPCREL(%rip) | |
3741 | which may be converted to | |
3742 | addr32 call __tls_get_addr | |
52bc799a | 3743 | into: |
e2cbcd91 L |
3744 | movl %fs:0, %eax |
3745 | addq foo@gottpoff(%rip), %rax | |
5c98a14e | 3746 | For largepic, change: |
e2cbcd91 L |
3747 | leaq foo@tlsgd(%rip), %rdi |
3748 | movabsq $__tls_get_addr@pltoff, %rax | |
3749 | addq %r15, %rax | |
3750 | call *%rax | |
5c98a14e | 3751 | into: |
e2cbcd91 L |
3752 | movq %fs:0, %rax |
3753 | addq foo@gottpoff(%rax), %rax | |
3754 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 3755 | int largepic = 0; |
e2cbcd91 | 3756 | if (ABI_64_P (output_bfd)) |
5c98a14e | 3757 | { |
e2cbcd91 L |
3758 | if (contents[roff + 5] == 0xb8) |
3759 | { | |
3760 | memcpy (contents + roff - 3, | |
3761 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
3762 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
3763 | largepic = 1; | |
3764 | } | |
3765 | else | |
3766 | memcpy (contents + roff - 4, | |
3767 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3768 | 16); | |
5c98a14e | 3769 | } |
52bc799a L |
3770 | else |
3771 | memcpy (contents + roff - 3, | |
3772 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3773 | 15); | |
142411ca | 3774 | |
6de2ae4a L |
3775 | relocation = (htab->elf.sgot->output_section->vma |
3776 | + htab->elf.sgot->output_offset + off | |
142411ca | 3777 | - roff |
5c98a14e | 3778 | - largepic |
142411ca L |
3779 | - input_section->output_section->vma |
3780 | - input_section->output_offset | |
3781 | - 12); | |
3782 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
3783 | contents + roff + 8 + largepic); |
3784 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 3785 | rel++; |
60f2e42e | 3786 | wrel++; |
142411ca L |
3787 | continue; |
3788 | } | |
351f65ca | 3789 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
3790 | { |
3791 | /* GDesc -> IE transition. | |
3792 | It's originally something like: | |
3793 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 3794 | |
142411ca | 3795 | Change it to: |
c9736ba0 | 3796 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 3797 | |
142411ca L |
3798 | /* Now modify the instruction as appropriate. To |
3799 | turn a leaq into a movq in the form we use it, it | |
3800 | suffices to change the second byte from 0x8d to | |
3801 | 0x8b. */ | |
3802 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
3803 | ||
3804 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
3805 | htab->elf.sgot->output_section->vma |
3806 | + htab->elf.sgot->output_offset + off | |
142411ca L |
3807 | - rel->r_offset |
3808 | - input_section->output_section->vma | |
3809 | - input_section->output_offset | |
3810 | - 4, | |
3811 | contents + roff); | |
3812 | continue; | |
3813 | } | |
351f65ca | 3814 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
3815 | { |
3816 | /* GDesc -> IE transition. | |
3817 | It's originally: | |
3818 | call *(%rax) | |
3819 | ||
3820 | Change it to: | |
c9736ba0 | 3821 | xchg %ax, %ax. */ |
142411ca | 3822 | |
142411ca L |
3823 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
3824 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
3825 | continue; | |
3826 | } | |
3827 | else | |
3828 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 3829 | } |
bffbf940 JJ |
3830 | break; |
3831 | ||
3832 | case R_X86_64_TLSLD: | |
351f65ca L |
3833 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3834 | input_section, contents, | |
3835 | symtab_hdr, sym_hashes, | |
bedfd056 L |
3836 | &r_type, GOT_UNKNOWN, rel, |
3837 | relend, h, r_symndx, TRUE)) | |
142411ca | 3838 | return FALSE; |
a3fadc9a | 3839 | |
142411ca L |
3840 | if (r_type != R_X86_64_TLSLD) |
3841 | { | |
bffbf940 | 3842 | /* LD->LE transition: |
e2cbcd91 L |
3843 | leaq foo@tlsld(%rip), %rdi |
3844 | call __tls_get_addr@PLT | |
3845 | For 64bit, we change it into: | |
3846 | .word 0x6666; .byte 0x66; movq %fs:0, %rax | |
3847 | For 32bit, we change it into: | |
3848 | nopl 0x0(%rax); movl %fs:0, %eax | |
3849 | Or | |
3850 | leaq foo@tlsld(%rip), %rdi; | |
3851 | call *__tls_get_addr@GOTPCREL(%rip) | |
3852 | which may be converted to | |
3853 | addr32 call __tls_get_addr | |
52bc799a | 3854 | For 64bit, we change it into: |
e2cbcd91 | 3855 | .word 0x6666; .word 0x6666; movq %fs:0, %rax |
52bc799a | 3856 | For 32bit, we change it into: |
e2cbcd91 | 3857 | nopw 0x0(%rax); movl %fs:0, %eax |
5c98a14e | 3858 | For largepic, change: |
e2cbcd91 L |
3859 | leaq foo@tlsgd(%rip), %rdi |
3860 | movabsq $__tls_get_addr@pltoff, %rax | |
3861 | addq %rbx, %rax | |
3862 | call *%rax | |
3863 | into | |
3864 | data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
3865 | movq %fs:0, %eax */ | |
142411ca L |
3866 | |
3867 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
e2cbcd91 L |
3868 | if (ABI_64_P (output_bfd)) |
3869 | { | |
3870 | if (contents[rel->r_offset + 5] == 0xb8) | |
3871 | memcpy (contents + rel->r_offset - 3, | |
3872 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
3873 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
3874 | else if (contents[rel->r_offset + 4] == 0xff | |
3875 | || contents[rel->r_offset + 4] == 0x67) | |
3876 | memcpy (contents + rel->r_offset - 3, | |
3877 | "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", | |
3878 | 13); | |
3879 | else | |
3880 | memcpy (contents + rel->r_offset - 3, | |
3881 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
3882 | } | |
52bc799a | 3883 | else |
e2cbcd91 L |
3884 | { |
3885 | if (contents[rel->r_offset + 4] == 0xff) | |
3886 | memcpy (contents + rel->r_offset - 3, | |
3887 | "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", | |
3888 | 13); | |
3889 | else | |
3890 | memcpy (contents + rel->r_offset - 3, | |
3891 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
3892 | } | |
3893 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX | |
3894 | and R_X86_64_PLTOFF64. */ | |
bffbf940 | 3895 | rel++; |
60f2e42e | 3896 | wrel++; |
bffbf940 JJ |
3897 | continue; |
3898 | } | |
3899 | ||
6de2ae4a | 3900 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3901 | abort (); |
3902 | ||
0afcef53 | 3903 | off = htab->tls_ld_or_ldm_got.offset; |
bffbf940 JJ |
3904 | if (off & 1) |
3905 | off &= ~1; | |
3906 | else | |
3907 | { | |
3908 | Elf_Internal_Rela outrel; | |
bffbf940 | 3909 | |
6de2ae4a | 3910 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3911 | abort (); |
3912 | ||
6de2ae4a L |
3913 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3914 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
3915 | |
3916 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3917 | htab->elf.sgot->contents + off); |
bffbf940 | 3918 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 3919 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 3920 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 3921 | outrel.r_addend = 0; |
351f65ca | 3922 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 3923 | &outrel); |
0afcef53 | 3924 | htab->tls_ld_or_ldm_got.offset |= 1; |
bffbf940 | 3925 | } |
6de2ae4a L |
3926 | relocation = htab->elf.sgot->output_section->vma |
3927 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3928 | unresolved_reloc = FALSE; |
bffbf940 JJ |
3929 | break; |
3930 | ||
3931 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
3932 | if (!bfd_link_executable (info) |
3933 | || (input_section->flags & SEC_CODE) == 0) | |
0afcef53 | 3934 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
bffbf940 | 3935 | else |
351f65ca | 3936 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
3937 | break; |
3938 | ||
3939 | case R_X86_64_TPOFF32: | |
6769d501 | 3940 | case R_X86_64_TPOFF64: |
0e1862bb | 3941 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 3942 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
3943 | break; |
3944 | ||
a69ed7f7 L |
3945 | case R_X86_64_DTPOFF64: |
3946 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
0afcef53 | 3947 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
a69ed7f7 L |
3948 | break; |
3949 | ||
70256ad8 AJ |
3950 | default: |
3951 | break; | |
3952 | } | |
8d88c4ca | 3953 | |
239e1f3a AM |
3954 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3955 | because such sections are not SEC_ALLOC and thus ld.so will | |
3956 | not process them. */ | |
c434dee6 | 3957 | if (unresolved_reloc |
239e1f3a | 3958 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
3959 | && h->def_dynamic) |
3960 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
3961 | rel->r_offset) != (bfd_vma) -1) | |
a040981f | 3962 | { |
7073b5b9 L |
3963 | switch (r_type) |
3964 | { | |
3965 | case R_X86_64_32S: | |
a5b4ee94 L |
3966 | sec = h->root.u.def.section; |
3967 | if ((info->nocopyreloc | |
3968 | || (eh->def_protected | |
3969 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
3970 | && !(h->root.u.def.section->flags & SEC_CODE)) |
3971 | return elf_x86_64_need_pic (info, input_bfd, input_section, | |
3972 | h, NULL, NULL, howto); | |
3973 | /* Fall through. */ | |
3974 | ||
3975 | default: | |
3976 | _bfd_error_handler | |
3977 | /* xgettext:c-format */ | |
3978 | (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"), | |
3979 | input_bfd, | |
3980 | input_section, | |
3981 | rel->r_offset, | |
3982 | howto->name, | |
3983 | h->root.root.string); | |
3984 | return FALSE; | |
3985 | } | |
a040981f | 3986 | } |
c434dee6 | 3987 | |
cbe950e9 | 3988 | do_relocation: |
8d88c4ca | 3989 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
3990 | contents, rel->r_offset, |
3991 | relocation, rel->r_addend); | |
8d88c4ca | 3992 | |
62d78908 | 3993 | check_relocation_error: |
8d88c4ca | 3994 | if (r != bfd_reloc_ok) |
8da6118f | 3995 | { |
c434dee6 AJ |
3996 | const char *name; |
3997 | ||
3998 | if (h != NULL) | |
3999 | name = h->root.root.string; | |
4000 | else | |
8da6118f | 4001 | { |
c434dee6 AJ |
4002 | name = bfd_elf_string_from_elf_section (input_bfd, |
4003 | symtab_hdr->sh_link, | |
4004 | sym->st_name); | |
4005 | if (name == NULL) | |
b34976b6 | 4006 | return FALSE; |
c434dee6 AJ |
4007 | if (*name == '\0') |
4008 | name = bfd_section_name (input_bfd, sec); | |
4009 | } | |
4010 | ||
4011 | if (r == bfd_reloc_overflow) | |
8b43e456 L |
4012 | { |
4013 | if (eh != NULL && eh->converted_reloc) | |
4014 | { | |
4015 | info->callbacks->einfo | |
4016 | (_("%F%P: failed to convert GOTPCREL relocation; relink with --no-relax\n")); | |
4017 | return FALSE; | |
4018 | } | |
4019 | (*info->callbacks->reloc_overflow) | |
4020 | (info, (h ? &h->root : NULL), name, howto->name, | |
4021 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
4022 | } | |
c434dee6 AJ |
4023 | else |
4024 | { | |
4eca0228 | 4025 | _bfd_error_handler |
695344c0 | 4026 | /* xgettext:c-format */ |
d42c267e | 4027 | (_("%B(%A+%#Lx): reloc against `%s': error %d"), |
d003868e | 4028 | input_bfd, input_section, |
d42c267e | 4029 | rel->r_offset, name, (int) r); |
b34976b6 | 4030 | return FALSE; |
8da6118f KH |
4031 | } |
4032 | } | |
60f2e42e L |
4033 | |
4034 | if (wrel != rel) | |
4035 | *wrel = *rel; | |
4036 | } | |
4037 | ||
4038 | if (wrel != rel) | |
4039 | { | |
4040 | Elf_Internal_Shdr *rel_hdr; | |
4041 | size_t deleted = rel - wrel; | |
4042 | ||
4043 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
4044 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
4045 | if (rel_hdr->sh_size == 0) | |
4046 | { | |
4047 | /* It is too late to remove an empty reloc section. Leave | |
4048 | one NONE reloc. | |
4049 | ??? What is wrong with an empty section??? */ | |
4050 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
4051 | deleted -= 1; | |
4052 | } | |
4053 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
4054 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
4055 | input_section->reloc_count -= deleted; | |
8d88c4ca | 4056 | } |
70256ad8 | 4057 | |
b34976b6 | 4058 | return TRUE; |
70256ad8 AJ |
4059 | } |
4060 | ||
4061 | /* Finish up dynamic symbol handling. We set the contents of various | |
4062 | dynamic sections here. */ | |
4063 | ||
b34976b6 | 4064 | static bfd_boolean |
351f65ca L |
4065 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
4066 | struct bfd_link_info *info, | |
4067 | struct elf_link_hash_entry *h, | |
aec6b87e | 4068 | Elf_Internal_Sym *sym) |
70256ad8 | 4069 | { |
0afcef53 | 4070 | struct elf_x86_link_hash_table *htab; |
f2c29a16 | 4071 | bfd_boolean use_plt_second; |
0afcef53 | 4072 | struct elf_x86_link_hash_entry *eh; |
aec6b87e | 4073 | bfd_boolean local_undefweak; |
70256ad8 | 4074 | |
0afcef53 | 4075 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
4076 | if (htab == NULL) |
4077 | return FALSE; | |
70256ad8 | 4078 | |
f2c29a16 L |
4079 | /* Use the second PLT section only if there is .plt section. */ |
4080 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
0ff2b86e | 4081 | |
0afcef53 | 4082 | eh = (struct elf_x86_link_hash_entry *) h; |
9e9821dd L |
4083 | if (eh->no_finish_dynamic_symbol) |
4084 | abort (); | |
dd7e64d4 | 4085 | |
aec6b87e L |
4086 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
4087 | resolved undefined weak symbols in executable so that their | |
4088 | references have value 0 at run-time. */ | |
e62b9723 | 4089 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
0afcef53 | 4090 | X86_64_ELF_DATA, |
e62b9723 L |
4091 | eh->has_got_reloc, |
4092 | eh); | |
aec6b87e | 4093 | |
70256ad8 AJ |
4094 | if (h->plt.offset != (bfd_vma) -1) |
4095 | { | |
70256ad8 | 4096 | bfd_vma plt_index; |
38b12349 | 4097 | bfd_vma got_offset, plt_offset; |
70256ad8 | 4098 | Elf_Internal_Rela rela; |
947216bf | 4099 | bfd_byte *loc; |
0ff2b86e | 4100 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 4101 | const struct elf_backend_data *bed; |
5974eba6 | 4102 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
4103 | |
4104 | /* When building a static executable, use .iplt, .igot.plt and | |
4105 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 4106 | if (htab->elf.splt != NULL) |
cbe950e9 | 4107 | { |
6de2ae4a L |
4108 | plt = htab->elf.splt; |
4109 | gotplt = htab->elf.sgotplt; | |
4110 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
4111 | } |
4112 | else | |
4113 | { | |
6de2ae4a L |
4114 | plt = htab->elf.iplt; |
4115 | gotplt = htab->elf.igotplt; | |
4116 | relplt = htab->elf.irelplt; | |
cbe950e9 | 4117 | } |
70256ad8 AJ |
4118 | |
4119 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 4120 | it up. */ |
cbe950e9 | 4121 | if ((h->dynindx == -1 |
aec6b87e | 4122 | && !local_undefweak |
0e1862bb | 4123 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
4124 | && h->def_regular |
4125 | && h->type == STT_GNU_IFUNC)) | |
4126 | || plt == NULL | |
4127 | || gotplt == NULL | |
4128 | || relplt == NULL) | |
cec7f46a | 4129 | abort (); |
70256ad8 AJ |
4130 | |
4131 | /* Get the index in the procedure linkage table which | |
4132 | corresponds to this symbol. This is the index of this symbol | |
4133 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 4134 | first entry in the procedure linkage table is reserved. |
6bbec505 | 4135 | |
cbe950e9 | 4136 | Get the offset into the .got table of the entry that |
407443a3 | 4137 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
4138 | bytes. The first three are reserved for the dynamic linker. |
4139 | ||
4140 | For static executables, we don't reserve anything. */ | |
4141 | ||
6de2ae4a | 4142 | if (plt == htab->elf.splt) |
cbe950e9 | 4143 | { |
765e526c L |
4144 | got_offset = (h->plt.offset / htab->plt.plt_entry_size |
4145 | - htab->plt.has_plt0); | |
e1f98742 | 4146 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
4147 | } |
4148 | else | |
4149 | { | |
765e526c | 4150 | got_offset = h->plt.offset / htab->plt.plt_entry_size; |
e1f98742 | 4151 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 4152 | } |
70256ad8 | 4153 | |
38b12349 | 4154 | /* Fill in the entry in the procedure linkage table. */ |
765e526c L |
4155 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, |
4156 | htab->plt.plt_entry_size); | |
f2c29a16 | 4157 | if (use_plt_second) |
0ff2b86e | 4158 | { |
f2c29a16 | 4159 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
765e526c L |
4160 | htab->non_lazy_plt->plt_entry, |
4161 | htab->non_lazy_plt->plt_entry_size); | |
0ff2b86e | 4162 | |
f2c29a16 L |
4163 | resolved_plt = htab->plt_second; |
4164 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
4165 | } |
4166 | else | |
4167 | { | |
0ff2b86e L |
4168 | resolved_plt = plt; |
4169 | plt_offset = h->plt.offset; | |
4170 | } | |
eed180f8 RM |
4171 | |
4172 | /* Insert the relocation positions of the plt section. */ | |
4173 | ||
4174 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
4175 | subtracting the size of that instruction. */ | |
ab7fede8 L |
4176 | plt_got_pcrel_offset = (gotplt->output_section->vma |
4177 | + gotplt->output_offset | |
4178 | + got_offset | |
4179 | - resolved_plt->output_section->vma | |
4180 | - resolved_plt->output_offset | |
4181 | - plt_offset | |
765e526c | 4182 | - htab->plt.plt_got_insn_size); |
ab7fede8 L |
4183 | |
4184 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 4185 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
695344c0 | 4186 | /* xgettext:c-format */ |
ab7fede8 L |
4187 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"), |
4188 | output_bfd, h->root.root.string); | |
4189 | ||
4190 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
38b12349 | 4191 | (resolved_plt->contents + plt_offset |
765e526c | 4192 | + htab->plt.plt_got_offset)); |
cbe950e9 | 4193 | |
653165cc | 4194 | /* Fill in the entry in the global offset table, initially this |
aec6b87e L |
4195 | points to the second part of the PLT entry. Leave the entry |
4196 | as zero for undefined weak symbol in PIE. No PLT relocation | |
4197 | against undefined weak symbol in PIE. */ | |
4198 | if (!local_undefweak) | |
cbe950e9 | 4199 | { |
765e526c | 4200 | if (htab->plt.has_plt0) |
38b12349 L |
4201 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4202 | + plt->output_offset | |
4203 | + h->plt.offset | |
765e526c | 4204 | + htab->lazy_plt->plt_lazy_offset), |
38b12349 | 4205 | gotplt->contents + got_offset); |
aec6b87e L |
4206 | |
4207 | /* Fill in the entry in the .rela.plt section. */ | |
4208 | rela.r_offset = (gotplt->output_section->vma | |
4209 | + gotplt->output_offset | |
4210 | + got_offset); | |
4211 | if (h->dynindx == -1 | |
4212 | || ((bfd_link_executable (info) | |
4213 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
4214 | && h->def_regular | |
4215 | && h->type == STT_GNU_IFUNC)) | |
4216 | { | |
6322e5c5 L |
4217 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
4218 | h->root.root.string, | |
4219 | h->root.u.def.section->owner); | |
4220 | ||
aec6b87e L |
4221 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
4222 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
4223 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); | |
4224 | rela.r_addend = (h->root.u.def.value | |
4225 | + h->root.u.def.section->output_section->vma | |
4226 | + h->root.u.def.section->output_offset); | |
4227 | /* R_X86_64_IRELATIVE comes last. */ | |
4228 | plt_index = htab->next_irelative_index--; | |
4229 | } | |
4230 | else | |
4231 | { | |
4232 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); | |
4233 | rela.r_addend = 0; | |
4234 | plt_index = htab->next_jump_slot_index++; | |
4235 | } | |
e1f98742 | 4236 | |
38b12349 L |
4237 | /* Don't fill the second and third slots in PLT entry for |
4238 | static executables nor without PLT0. */ | |
765e526c | 4239 | if (plt == htab->elf.splt && htab->plt.has_plt0) |
aec6b87e | 4240 | { |
38b12349 | 4241 | bfd_vma plt0_offset |
765e526c | 4242 | = h->plt.offset + htab->lazy_plt->plt_plt_insn_end; |
aec6b87e L |
4243 | |
4244 | /* Put relocation index. */ | |
4245 | bfd_put_32 (output_bfd, plt_index, | |
4246 | (plt->contents + h->plt.offset | |
765e526c | 4247 | + htab->lazy_plt->plt_reloc_offset)); |
aec6b87e L |
4248 | |
4249 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
4250 | check relocation index for overflow since branch displacement | |
4251 | will overflow first. */ | |
4252 | if (plt0_offset > 0x80000000) | |
695344c0 | 4253 | /* xgettext:c-format */ |
aec6b87e L |
4254 | info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"), |
4255 | output_bfd, h->root.root.string); | |
4256 | bfd_put_32 (output_bfd, - plt0_offset, | |
38b12349 | 4257 | (plt->contents + h->plt.offset |
765e526c | 4258 | + htab->lazy_plt->plt_plt_offset)); |
aec6b87e | 4259 | } |
351f65ca | 4260 | |
aec6b87e L |
4261 | bed = get_elf_backend_data (output_bfd); |
4262 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
4263 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
4264 | } | |
dd7e64d4 L |
4265 | } |
4266 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
4267 | { | |
38b12349 | 4268 | bfd_vma got_offset, plt_offset; |
dd7e64d4 L |
4269 | asection *plt, *got; |
4270 | bfd_boolean got_after_plt; | |
4271 | int32_t got_pcrel_offset; | |
dd7e64d4 L |
4272 | |
4273 | /* Set the entry in the GOT procedure linkage table. */ | |
4274 | plt = htab->plt_got; | |
4275 | got = htab->elf.sgot; | |
4276 | got_offset = h->got.offset; | |
4277 | ||
4278 | if (got_offset == (bfd_vma) -1 | |
e492d2f8 | 4279 | || (h->type == STT_GNU_IFUNC && h->def_regular) |
dd7e64d4 L |
4280 | || plt == NULL |
4281 | || got == NULL) | |
4282 | abort (); | |
70256ad8 | 4283 | |
38b12349 | 4284 | /* Use the non-lazy PLT entry template for the GOT PLT since they |
dd7e64d4 | 4285 | are the identical. */ |
dd7e64d4 L |
4286 | /* Fill in the entry in the GOT procedure linkage table. */ |
4287 | plt_offset = eh->plt_got.offset; | |
4288 | memcpy (plt->contents + plt_offset, | |
765e526c L |
4289 | htab->non_lazy_plt->plt_entry, |
4290 | htab->non_lazy_plt->plt_entry_size); | |
dd7e64d4 L |
4291 | |
4292 | /* Put offset the PC-relative instruction referring to the GOT | |
4293 | entry, subtracting the size of that instruction. */ | |
4294 | got_pcrel_offset = (got->output_section->vma | |
4295 | + got->output_offset | |
4296 | + got_offset | |
4297 | - plt->output_section->vma | |
4298 | - plt->output_offset | |
4299 | - plt_offset | |
765e526c | 4300 | - htab->non_lazy_plt->plt_got_insn_size); |
dd7e64d4 L |
4301 | |
4302 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
4303 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
4304 | if ((got_after_plt && got_pcrel_offset < 0) | |
4305 | || (!got_after_plt && got_pcrel_offset > 0)) | |
695344c0 | 4306 | /* xgettext:c-format */ |
dd7e64d4 L |
4307 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"), |
4308 | output_bfd, h->root.root.string); | |
4309 | ||
4310 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
38b12349 | 4311 | (plt->contents + plt_offset |
765e526c | 4312 | + htab->non_lazy_plt->plt_got_offset)); |
dd7e64d4 L |
4313 | } |
4314 | ||
aec6b87e L |
4315 | if (!local_undefweak |
4316 | && !h->def_regular | |
dd7e64d4 L |
4317 | && (h->plt.offset != (bfd_vma) -1 |
4318 | || eh->plt_got.offset != (bfd_vma) -1)) | |
4319 | { | |
4320 | /* Mark the symbol as undefined, rather than as defined in | |
4321 | the .plt section. Leave the value if there were any | |
4322 | relocations where pointer equality matters (this is a clue | |
4323 | for the dynamic linker, to make function pointer | |
4324 | comparisons work between an application and shared | |
4325 | library), otherwise set it to zero. If a function is only | |
4326 | called from a binary, there is no need to slow down | |
4327 | shared libraries because of that. */ | |
4328 | sym->st_shndx = SHN_UNDEF; | |
4329 | if (!h->pointer_equality_needed) | |
4330 | sym->st_value = 0; | |
70256ad8 AJ |
4331 | } |
4332 | ||
aec6b87e L |
4333 | /* Don't generate dynamic GOT relocation against undefined weak |
4334 | symbol in executable. */ | |
bffbf940 | 4335 | if (h->got.offset != (bfd_vma) -1 |
0afcef53 L |
4336 | && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h)->tls_type) |
4337 | && elf_x86_hash_entry (h)->tls_type != GOT_TLS_IE | |
aec6b87e | 4338 | && !local_undefweak) |
053579d7 | 4339 | { |
053579d7 | 4340 | Elf_Internal_Rela rela; |
233cc9c1 | 4341 | asection *relgot = htab->elf.srelgot; |
053579d7 AJ |
4342 | |
4343 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 4344 | up. */ |
6de2ae4a | 4345 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 4346 | abort (); |
053579d7 | 4347 | |
6de2ae4a L |
4348 | rela.r_offset = (htab->elf.sgot->output_section->vma |
4349 | + htab->elf.sgot->output_offset | |
dc810e39 | 4350 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
4351 | |
4352 | /* If this is a static link, or it is a -Bsymbolic link and the | |
4353 | symbol is defined locally or was forced to be local because | |
4354 | of a version file, we just want to emit a RELATIVE reloc. | |
4355 | The entry in the global offset table will already have been | |
4356 | initialized in the relocate_section function. */ | |
710ab287 | 4357 | if (h->def_regular |
0018b0a3 L |
4358 | && h->type == STT_GNU_IFUNC) |
4359 | { | |
233cc9c1 L |
4360 | if (h->plt.offset == (bfd_vma) -1) |
4361 | { | |
4362 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
4363 | if (htab->elf.splt == NULL) | |
4364 | { | |
4365 | /* use .rel[a].iplt section to store .got relocations | |
4366 | in static executable. */ | |
4367 | relgot = htab->elf.irelplt; | |
4368 | } | |
4369 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
4370 | { | |
6322e5c5 L |
4371 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
4372 | output_bfd, | |
4373 | h->root.root.string, | |
4374 | h->root.u.def.section->owner); | |
4375 | ||
233cc9c1 L |
4376 | rela.r_info = htab->r_info (0, |
4377 | R_X86_64_IRELATIVE); | |
4378 | rela.r_addend = (h->root.u.def.value | |
4379 | + h->root.u.def.section->output_section->vma | |
4380 | + h->root.u.def.section->output_offset); | |
4381 | } | |
4382 | else | |
4383 | goto do_glob_dat; | |
4384 | } | |
4385 | else if (bfd_link_pic (info)) | |
710ab287 L |
4386 | { |
4387 | /* Generate R_X86_64_GLOB_DAT. */ | |
4388 | goto do_glob_dat; | |
4389 | } | |
4390 | else | |
4391 | { | |
90d60710 | 4392 | asection *plt; |
aab82f4c | 4393 | bfd_vma plt_offset; |
90d60710 | 4394 | |
710ab287 L |
4395 | if (!h->pointer_equality_needed) |
4396 | abort (); | |
4397 | ||
4398 | /* For non-shared object, we can't use .got.plt, which | |
4399 | contains the real function addres if we need pointer | |
4400 | equality. We load the GOT entry with the PLT entry. */ | |
f2c29a16 | 4401 | if (htab->plt_second != NULL) |
aab82f4c | 4402 | { |
f2c29a16 L |
4403 | plt = htab->plt_second; |
4404 | plt_offset = eh->plt_second.offset; | |
aab82f4c L |
4405 | } |
4406 | else | |
4407 | { | |
4408 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
4409 | plt_offset = h->plt.offset; | |
4410 | } | |
710ab287 L |
4411 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4412 | + plt->output_offset | |
aab82f4c | 4413 | + plt_offset), |
6de2ae4a | 4414 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
4415 | return TRUE; |
4416 | } | |
0018b0a3 | 4417 | } |
0e1862bb | 4418 | else if (bfd_link_pic (info) |
0018b0a3 | 4419 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
053579d7 | 4420 | { |
ad71ce8d | 4421 | if (!(h->def_regular || ELF_COMMON_DEF_P (h))) |
41bed6dd | 4422 | return FALSE; |
cc78d0af | 4423 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 4424 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
4425 | rela.r_addend = (h->root.u.def.value |
4426 | + h->root.u.def.section->output_section->vma | |
4427 | + h->root.u.def.section->output_offset); | |
4428 | } | |
4429 | else | |
4430 | { | |
4431 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 4432 | do_glob_dat: |
c434dee6 | 4433 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4434 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 4435 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
4436 | rela.r_addend = 0; |
4437 | } | |
4438 | ||
233cc9c1 | 4439 | elf_append_rela (output_bfd, relgot, &rela); |
053579d7 AJ |
4440 | } |
4441 | ||
f5385ebf | 4442 | if (h->needs_copy) |
70256ad8 | 4443 | { |
70256ad8 | 4444 | Elf_Internal_Rela rela; |
5474d94f | 4445 | asection *s; |
70256ad8 AJ |
4446 | |
4447 | /* This symbol needs a copy reloc. Set it up. */ | |
4448 | ||
c434dee6 AJ |
4449 | if (h->dynindx == -1 |
4450 | || (h->root.type != bfd_link_hash_defined | |
4451 | && h->root.type != bfd_link_hash_defweak) | |
5474d94f AM |
4452 | || htab->elf.srelbss == NULL |
4453 | || htab->elf.sreldynrelro == NULL) | |
c434dee6 | 4454 | abort (); |
70256ad8 AJ |
4455 | |
4456 | rela.r_offset = (h->root.u.def.value | |
4457 | + h->root.u.def.section->output_section->vma | |
4458 | + h->root.u.def.section->output_offset); | |
351f65ca | 4459 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 4460 | rela.r_addend = 0; |
afbf7e8e | 4461 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
4462 | s = htab->elf.sreldynrelro; |
4463 | else | |
4464 | s = htab->elf.srelbss; | |
4465 | elf_append_rela (output_bfd, s, &rela); | |
70256ad8 AJ |
4466 | } |
4467 | ||
b34976b6 | 4468 | return TRUE; |
70256ad8 AJ |
4469 | } |
4470 | ||
c25bc9fc L |
4471 | /* Finish up local dynamic symbol handling. We set the contents of |
4472 | various dynamic sections here. */ | |
4473 | ||
4474 | static bfd_boolean | |
351f65ca | 4475 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
4476 | { |
4477 | struct elf_link_hash_entry *h | |
4478 | = (struct elf_link_hash_entry *) *slot; | |
4479 | struct bfd_link_info *info | |
eed180f8 | 4480 | = (struct bfd_link_info *) inf; |
c25bc9fc | 4481 | |
351f65ca | 4482 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
5f0f0847 | 4483 | info, h, NULL); |
c25bc9fc L |
4484 | } |
4485 | ||
aec6b87e L |
4486 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
4487 | here since undefined weak symbol may not be dynamic and may not be | |
4488 | called for elf_x86_64_finish_dynamic_symbol. */ | |
4489 | ||
4490 | static bfd_boolean | |
4491 | elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
4492 | void *inf) | |
4493 | { | |
4494 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
4495 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
4496 | ||
4497 | if (h->root.type != bfd_link_hash_undefweak | |
4498 | || h->dynindx != -1) | |
4499 | return TRUE; | |
4500 | ||
4501 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, | |
5f0f0847 | 4502 | info, h, NULL); |
aec6b87e L |
4503 | } |
4504 | ||
c434dee6 AJ |
4505 | /* Used to decide how to sort relocs in an optimal manner for the |
4506 | dynamic linker, before writing them out. */ | |
4507 | ||
4508 | static enum elf_reloc_type_class | |
cae1fbbb | 4509 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
4510 | const asection *rel_sec ATTRIBUTE_UNUSED, |
4511 | const Elf_Internal_Rela *rela) | |
c434dee6 | 4512 | { |
cae1fbbb L |
4513 | bfd *abfd = info->output_bfd; |
4514 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
0afcef53 L |
4515 | struct elf_x86_link_hash_table *htab |
4516 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
cae1fbbb | 4517 | |
d9e3b590 L |
4518 | if (htab->elf.dynsym != NULL |
4519 | && htab->elf.dynsym->contents != NULL) | |
4520 | { | |
4521 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
4522 | dynamic symbols. */ | |
4523 | unsigned long r_symndx = htab->r_sym (rela->r_info); | |
897463b1 L |
4524 | if (r_symndx != STN_UNDEF) |
4525 | { | |
4526 | Elf_Internal_Sym sym; | |
4527 | if (!bed->s->swap_symbol_in (abfd, | |
4528 | (htab->elf.dynsym->contents | |
4529 | + r_symndx * bed->s->sizeof_sym), | |
4530 | 0, &sym)) | |
4531 | abort (); | |
d9e3b590 | 4532 | |
897463b1 L |
4533 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
4534 | return reloc_class_ifunc; | |
4535 | } | |
d9e3b590 | 4536 | } |
cae1fbbb | 4537 | |
351f65ca | 4538 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 | 4539 | { |
c428ce9d L |
4540 | case R_X86_64_IRELATIVE: |
4541 | return reloc_class_ifunc; | |
c434dee6 | 4542 | case R_X86_64_RELATIVE: |
1da80baa | 4543 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
4544 | return reloc_class_relative; |
4545 | case R_X86_64_JUMP_SLOT: | |
4546 | return reloc_class_plt; | |
4547 | case R_X86_64_COPY: | |
4548 | return reloc_class_copy; | |
4549 | default: | |
4550 | return reloc_class_normal; | |
4551 | } | |
4552 | } | |
4553 | ||
70256ad8 AJ |
4554 | /* Finish up the dynamic sections. */ |
4555 | ||
b34976b6 | 4556 | static bfd_boolean |
351f65ca L |
4557 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
4558 | struct bfd_link_info *info) | |
70256ad8 | 4559 | { |
0afcef53 | 4560 | struct elf_x86_link_hash_table *htab; |
70256ad8 AJ |
4561 | bfd *dynobj; |
4562 | asection *sdyn; | |
70256ad8 | 4563 | |
0afcef53 | 4564 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
4565 | if (htab == NULL) |
4566 | return FALSE; | |
4567 | ||
c434dee6 | 4568 | dynobj = htab->elf.dynobj; |
3d4d4302 | 4569 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
70256ad8 | 4570 | |
c434dee6 | 4571 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 4572 | { |
82e96e07 L |
4573 | bfd_byte *dyncon, *dynconend; |
4574 | const struct elf_backend_data *bed; | |
4575 | bfd_size_type sizeof_dyn; | |
70256ad8 | 4576 | |
6de2ae4a | 4577 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 4578 | abort (); |
70256ad8 | 4579 | |
82e96e07 L |
4580 | bed = get_elf_backend_data (dynobj); |
4581 | sizeof_dyn = bed->s->sizeof_dyn; | |
4582 | dyncon = sdyn->contents; | |
4583 | dynconend = sdyn->contents + sdyn->size; | |
4584 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
4585 | { |
4586 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
4587 | asection *s; |
4588 | ||
82e96e07 | 4589 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
4590 | |
4591 | switch (dyn.d_tag) | |
4592 | { | |
4593 | default: | |
053579d7 | 4594 | continue; |
70256ad8 AJ |
4595 | |
4596 | case DT_PLTGOT: | |
6de2ae4a | 4597 | s = htab->elf.sgotplt; |
8c37241b | 4598 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 4599 | break; |
70256ad8 AJ |
4600 | |
4601 | case DT_JMPREL: | |
6de2ae4a | 4602 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 4603 | break; |
70256ad8 | 4604 | |
c434dee6 | 4605 | case DT_PLTRELSZ: |
6de2ae4a | 4606 | s = htab->elf.srelplt->output_section; |
eea6121a | 4607 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
4608 | break; |
4609 | ||
67a4f2b7 | 4610 | case DT_TLSDESC_PLT: |
6de2ae4a | 4611 | s = htab->elf.splt; |
67a4f2b7 AO |
4612 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
4613 | + htab->tlsdesc_plt; | |
4614 | break; | |
4615 | ||
4616 | case DT_TLSDESC_GOT: | |
6de2ae4a | 4617 | s = htab->elf.sgot; |
67a4f2b7 AO |
4618 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
4619 | + htab->tlsdesc_got; | |
4620 | break; | |
70256ad8 | 4621 | } |
c434dee6 | 4622 | |
82e96e07 | 4623 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
4624 | } |
4625 | ||
6de2ae4a | 4626 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 4627 | { |
eed180f8 | 4628 | elf_section_data (htab->elf.splt->output_section) |
765e526c | 4629 | ->this_hdr.sh_entsize = htab->plt.plt_entry_size; |
67a4f2b7 | 4630 | |
765e526c | 4631 | if (htab->plt.has_plt0) |
67a4f2b7 | 4632 | { |
38b12349 L |
4633 | /* Fill in the special first entry in the procedure linkage |
4634 | table. */ | |
4635 | memcpy (htab->elf.splt->contents, | |
765e526c L |
4636 | htab->lazy_plt->plt0_entry, |
4637 | htab->lazy_plt->plt0_entry_size); | |
38b12349 L |
4638 | /* Add offset for pushq GOT+8(%rip), since the instruction |
4639 | uses 6 bytes subtract this value. */ | |
67a4f2b7 | 4640 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4641 | (htab->elf.sgotplt->output_section->vma |
4642 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 4643 | + 8 |
6de2ae4a L |
4644 | - htab->elf.splt->output_section->vma |
4645 | - htab->elf.splt->output_offset | |
67a4f2b7 | 4646 | - 6), |
38b12349 | 4647 | (htab->elf.splt->contents |
765e526c | 4648 | + htab->lazy_plt->plt0_got1_offset)); |
38b12349 L |
4649 | /* Add offset for the PC-relative instruction accessing |
4650 | GOT+16, subtracting the offset to the end of that | |
4651 | instruction. */ | |
67a4f2b7 | 4652 | bfd_put_32 (output_bfd, |
38b12349 L |
4653 | (htab->elf.sgotplt->output_section->vma |
4654 | + htab->elf.sgotplt->output_offset | |
4655 | + 16 | |
6de2ae4a L |
4656 | - htab->elf.splt->output_section->vma |
4657 | - htab->elf.splt->output_offset | |
765e526c | 4658 | - htab->lazy_plt->plt0_got2_insn_end), |
38b12349 | 4659 | (htab->elf.splt->contents |
765e526c | 4660 | + htab->lazy_plt->plt0_got2_offset)); |
38b12349 L |
4661 | |
4662 | if (htab->tlsdesc_plt) | |
4663 | { | |
4664 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
4665 | htab->elf.sgot->contents + htab->tlsdesc_got); | |
4666 | ||
4667 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, | |
765e526c L |
4668 | htab->lazy_plt->plt0_entry, |
4669 | htab->lazy_plt->plt0_entry_size); | |
38b12349 L |
4670 | |
4671 | /* Add offset for pushq GOT+8(%rip), since the | |
4672 | instruction uses 6 bytes subtract this value. */ | |
4673 | bfd_put_32 (output_bfd, | |
4674 | (htab->elf.sgotplt->output_section->vma | |
4675 | + htab->elf.sgotplt->output_offset | |
4676 | + 8 | |
4677 | - htab->elf.splt->output_section->vma | |
4678 | - htab->elf.splt->output_offset | |
4679 | - htab->tlsdesc_plt | |
4680 | - 6), | |
4681 | (htab->elf.splt->contents | |
4682 | + htab->tlsdesc_plt | |
765e526c | 4683 | + htab->lazy_plt->plt0_got1_offset)); |
38b12349 L |
4684 | /* Add offset for the PC-relative instruction accessing |
4685 | GOT+TDG, where TDG stands for htab->tlsdesc_got, | |
4686 | subtracting the offset to the end of that | |
4687 | instruction. */ | |
4688 | bfd_put_32 (output_bfd, | |
4689 | (htab->elf.sgot->output_section->vma | |
4690 | + htab->elf.sgot->output_offset | |
4691 | + htab->tlsdesc_got | |
4692 | - htab->elf.splt->output_section->vma | |
4693 | - htab->elf.splt->output_offset | |
4694 | - htab->tlsdesc_plt | |
765e526c | 4695 | - htab->lazy_plt->plt0_got2_insn_end), |
38b12349 L |
4696 | (htab->elf.splt->contents |
4697 | + htab->tlsdesc_plt | |
765e526c | 4698 | + htab->lazy_plt->plt0_got2_offset)); |
38b12349 | 4699 | } |
67a4f2b7 | 4700 | } |
70256ad8 | 4701 | } |
70256ad8 | 4702 | |
0afcef53 L |
4703 | if (htab->plt_got != NULL && htab->plt_got->size > 0) |
4704 | elf_section_data (htab->plt_got->output_section) | |
765e526c | 4705 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; |
38b12349 | 4706 | |
0afcef53 L |
4707 | if (htab->plt_second != NULL && htab->plt_second->size > 0) |
4708 | elf_section_data (htab->plt_second->output_section) | |
765e526c | 4709 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; |
0afcef53 | 4710 | } |
0ff2b86e | 4711 | |
38b12349 L |
4712 | /* GOT is always created in setup_gnu_properties. But it may not be |
4713 | needed. */ | |
4714 | if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0) | |
70256ad8 | 4715 | { |
56d4289c L |
4716 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
4717 | { | |
4eca0228 | 4718 | _bfd_error_handler |
56d4289c L |
4719 | (_("discarded output section: `%A'"), htab->elf.sgotplt); |
4720 | return FALSE; | |
4721 | } | |
4722 | ||
38b12349 L |
4723 | /* Set the first entry in the global offset table to the address of |
4724 | the dynamic section. */ | |
4725 | if (sdyn == NULL) | |
4726 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); | |
4727 | else | |
4728 | bfd_put_64 (output_bfd, | |
4729 | sdyn->output_section->vma + sdyn->output_offset, | |
4730 | htab->elf.sgotplt->contents); | |
4731 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ | |
4732 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
4733 | htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); | |
4734 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
4735 | htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
4736 | ||
4737 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize | |
4738 | = GOT_ENTRY_SIZE; | |
c434dee6 | 4739 | } |
70256ad8 | 4740 | |
e41b3a13 | 4741 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
4742 | if (htab->plt_eh_frame != NULL |
4743 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
4744 | { |
4745 | if (htab->elf.splt != NULL | |
4746 | && htab->elf.splt->size != 0 | |
4747 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
4748 | && htab->elf.splt->output_section != NULL | |
4749 | && htab->plt_eh_frame->output_section != NULL) | |
4750 | { | |
4751 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
4752 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
4753 | + htab->plt_eh_frame->output_offset | |
4754 | + PLT_FDE_START_OFFSET; | |
4755 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
4756 | htab->plt_eh_frame->contents | |
4757 | + PLT_FDE_START_OFFSET); | |
4758 | } | |
dbaa2011 | 4759 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
4760 | { |
4761 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
4762 | htab->plt_eh_frame, | |
4763 | htab->plt_eh_frame->contents)) | |
4764 | return FALSE; | |
4765 | } | |
4766 | } | |
4767 | ||
fff53dae L |
4768 | /* Adjust .eh_frame for .plt.got section. */ |
4769 | if (htab->plt_got_eh_frame != NULL | |
4770 | && htab->plt_got_eh_frame->contents != NULL) | |
4771 | { | |
4772 | if (htab->plt_got != NULL | |
4773 | && htab->plt_got->size != 0 | |
4774 | && (htab->plt_got->flags & SEC_EXCLUDE) == 0 | |
4775 | && htab->plt_got->output_section != NULL | |
4776 | && htab->plt_got_eh_frame->output_section != NULL) | |
4777 | { | |
4778 | bfd_vma plt_start = htab->plt_got->output_section->vma; | |
4779 | bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma | |
4780 | + htab->plt_got_eh_frame->output_offset | |
4781 | + PLT_FDE_START_OFFSET; | |
4782 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
4783 | htab->plt_got_eh_frame->contents | |
4784 | + PLT_FDE_START_OFFSET); | |
4785 | } | |
4786 | if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
4787 | { | |
4788 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
4789 | htab->plt_got_eh_frame, | |
4790 | htab->plt_got_eh_frame->contents)) | |
4791 | return FALSE; | |
4792 | } | |
4793 | } | |
4794 | ||
f2c29a16 L |
4795 | /* Adjust .eh_frame for the second PLT section. */ |
4796 | if (htab->plt_second_eh_frame != NULL | |
4797 | && htab->plt_second_eh_frame->contents != NULL) | |
8361ed4d | 4798 | { |
f2c29a16 L |
4799 | if (htab->plt_second != NULL |
4800 | && htab->plt_second->size != 0 | |
4801 | && (htab->plt_second->flags & SEC_EXCLUDE) == 0 | |
4802 | && htab->plt_second->output_section != NULL | |
4803 | && htab->plt_second_eh_frame->output_section != NULL) | |
8361ed4d | 4804 | { |
f2c29a16 L |
4805 | bfd_vma plt_start = htab->plt_second->output_section->vma; |
4806 | bfd_vma eh_frame_start | |
4807 | = (htab->plt_second_eh_frame->output_section->vma | |
4808 | + htab->plt_second_eh_frame->output_offset | |
4809 | + PLT_FDE_START_OFFSET); | |
8361ed4d | 4810 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, |
f2c29a16 | 4811 | htab->plt_second_eh_frame->contents |
8361ed4d L |
4812 | + PLT_FDE_START_OFFSET); |
4813 | } | |
f2c29a16 L |
4814 | if (htab->plt_second_eh_frame->sec_info_type |
4815 | == SEC_INFO_TYPE_EH_FRAME) | |
8361ed4d L |
4816 | { |
4817 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
f2c29a16 L |
4818 | htab->plt_second_eh_frame, |
4819 | htab->plt_second_eh_frame->contents)) | |
8361ed4d L |
4820 | return FALSE; |
4821 | } | |
4822 | } | |
4823 | ||
6de2ae4a L |
4824 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
4825 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
4826 | = GOT_ENTRY_SIZE; |
4827 | ||
aec6b87e L |
4828 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
4829 | if (bfd_link_pie (info)) | |
4830 | bfd_hash_traverse (&info->hash->table, | |
4831 | elf_x86_64_pie_finish_undefweak_symbol, | |
4832 | info); | |
4833 | ||
b34976b6 | 4834 | return TRUE; |
8d88c4ca NC |
4835 | } |
4836 | ||
233cc9c1 L |
4837 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
4838 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
4839 | It has to be done before elf_link_sort_relocs is called so that | |
4840 | dynamic relocations are properly sorted. */ | |
4841 | ||
4842 | static bfd_boolean | |
4843 | elf_x86_64_output_arch_local_syms | |
4844 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
4845 | struct bfd_link_info *info, | |
4846 | void *flaginfo ATTRIBUTE_UNUSED, | |
4847 | int (*func) (void *, const char *, | |
4848 | Elf_Internal_Sym *, | |
4849 | asection *, | |
4850 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
4851 | { | |
0afcef53 L |
4852 | struct elf_x86_link_hash_table *htab |
4853 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
233cc9c1 L |
4854 | if (htab == NULL) |
4855 | return FALSE; | |
4856 | ||
4857 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
4858 | htab_traverse (htab->loc_hash_table, | |
4859 | elf_x86_64_finish_local_dynamic_symbol, | |
4860 | info); | |
4861 | ||
4862 | return TRUE; | |
4863 | } | |
4864 | ||
38b12349 | 4865 | /* Forward declaration. */ |
765e526c | 4866 | static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt; |
38b12349 L |
4867 | |
4868 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all | |
4869 | dynamic relocations. */ | |
4870 | ||
4871 | static long | |
4872 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
4873 | long symcount ATTRIBUTE_UNUSED, | |
4874 | asymbol **syms ATTRIBUTE_UNUSED, | |
4875 | long dynsymcount, | |
4876 | asymbol **dynsyms, | |
4877 | asymbol **ret) | |
4878 | { | |
f493882d | 4879 | long count, i, n; |
38b12349 | 4880 | int j; |
38b12349 | 4881 | bfd_byte *plt_contents; |
f493882d | 4882 | long relsize; |
765e526c L |
4883 | const struct elf_x86_lazy_plt_layout *lazy_plt; |
4884 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
4885 | const struct elf_x86_lazy_plt_layout *lazy_bnd_plt; | |
4886 | const struct elf_x86_non_lazy_plt_layout *non_lazy_bnd_plt; | |
4887 | const struct elf_x86_lazy_plt_layout *lazy_ibt_plt; | |
4888 | const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt; | |
38b12349 | 4889 | asection *plt; |
f493882d L |
4890 | enum elf_x86_plt_type plt_type; |
4891 | struct elf_x86_plt plts[] = | |
144bed8d | 4892 | { |
38b12349 L |
4893 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
4894 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
f2c29a16 L |
4895 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, |
4896 | { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
dd9e66ee | 4897 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } |
38b12349 | 4898 | }; |
144bed8d | 4899 | |
38b12349 | 4900 | *ret = NULL; |
144bed8d | 4901 | |
38b12349 L |
4902 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
4903 | return 0; | |
144bed8d | 4904 | |
38b12349 L |
4905 | if (dynsymcount <= 0) |
4906 | return 0; | |
cca5b8b6 | 4907 | |
38b12349 L |
4908 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
4909 | if (relsize <= 0) | |
4910 | return -1; | |
4911 | ||
38b12349 | 4912 | if (get_elf_x86_64_backend_data (abfd)->os == is_normal) |
144bed8d | 4913 | { |
38b12349 L |
4914 | lazy_plt = &elf_x86_64_lazy_plt; |
4915 | non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
4916 | lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt; | |
4917 | non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt; | |
ee2fdd6f L |
4918 | if (ABI_64_P (abfd)) |
4919 | { | |
4920 | lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; | |
4921 | non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
4922 | } | |
4923 | else | |
4924 | { | |
4925 | lazy_ibt_plt = &elf_x32_lazy_ibt_plt; | |
4926 | non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
4927 | } | |
38b12349 L |
4928 | } |
4929 | else | |
4930 | { | |
4931 | lazy_plt = &elf_x86_64_nacl_plt; | |
4932 | non_lazy_plt = NULL; | |
4933 | lazy_bnd_plt = NULL; | |
4934 | non_lazy_bnd_plt = NULL; | |
ee2fdd6f L |
4935 | lazy_ibt_plt = NULL; |
4936 | non_lazy_ibt_plt = NULL; | |
38b12349 | 4937 | } |
144bed8d | 4938 | |
38b12349 L |
4939 | count = 0; |
4940 | for (j = 0; plts[j].name != NULL; j++) | |
4941 | { | |
4942 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
90efb642 | 4943 | if (plt == NULL || plt->size == 0) |
6f25f223 | 4944 | continue; |
533d0af0 | 4945 | |
38b12349 L |
4946 | /* Get the PLT section contents. */ |
4947 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
4948 | if (plt_contents == NULL) | |
4949 | break; | |
4950 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
4951 | plt_contents, 0, plt->size)) | |
4952 | { | |
4953 | free (plt_contents); | |
4954 | break; | |
4955 | } | |
144bed8d | 4956 | |
38b12349 L |
4957 | /* Check what kind of PLT it is. */ |
4958 | plt_type = plt_unknown; | |
90efb642 L |
4959 | if (plts[j].type == plt_unknown |
4960 | && (plt->size >= (lazy_plt->plt_entry_size | |
4961 | + lazy_plt->plt_entry_size))) | |
144bed8d | 4962 | { |
38b12349 L |
4963 | /* Match lazy PLT first. Need to check the first two |
4964 | instructions. */ | |
4965 | if ((memcmp (plt_contents, lazy_plt->plt0_entry, | |
4966 | lazy_plt->plt0_got1_offset) == 0) | |
4967 | && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6, | |
4968 | 2) == 0)) | |
4969 | plt_type = plt_lazy; | |
4970 | else if (lazy_bnd_plt != NULL | |
4971 | && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry, | |
4972 | lazy_bnd_plt->plt0_got1_offset) == 0) | |
4973 | && (memcmp (plt_contents + 6, | |
4974 | lazy_bnd_plt->plt0_entry + 6, 3) == 0)) | |
ec1f73bb | 4975 | { |
f2c29a16 | 4976 | plt_type = plt_lazy | plt_second; |
ee2fdd6f L |
4977 | /* The fist entry in the lazy IBT PLT is the same as the |
4978 | lazy BND PLT. */ | |
4979 | if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size, | |
4980 | lazy_ibt_plt->plt_entry, | |
4981 | lazy_ibt_plt->plt_got_offset) == 0)) | |
4982 | lazy_plt = lazy_ibt_plt; | |
4983 | else | |
4984 | lazy_plt = lazy_bnd_plt; | |
ec1f73bb | 4985 | } |
144bed8d | 4986 | } |
fca6ae69 | 4987 | |
38b12349 | 4988 | if (non_lazy_plt != NULL |
90efb642 L |
4989 | && (plt_type == plt_unknown || plt_type == plt_non_lazy) |
4990 | && plt->size >= non_lazy_plt->plt_entry_size) | |
38b12349 L |
4991 | { |
4992 | /* Match non-lazy PLT. */ | |
4993 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
4994 | non_lazy_plt->plt_got_offset) == 0) | |
4995 | plt_type = plt_non_lazy; | |
4996 | } | |
4997 | ||
ee2fdd6f | 4998 | if (plt_type == plt_unknown || plt_type == plt_second) |
38b12349 | 4999 | { |
ee2fdd6f | 5000 | if (non_lazy_bnd_plt != NULL |
90efb642 | 5001 | && plt->size >= non_lazy_bnd_plt->plt_entry_size |
ee2fdd6f L |
5002 | && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry, |
5003 | non_lazy_bnd_plt->plt_got_offset) == 0)) | |
38b12349 | 5004 | { |
ee2fdd6f | 5005 | /* Match BND PLT. */ |
f2c29a16 | 5006 | plt_type = plt_second; |
38b12349 L |
5007 | non_lazy_plt = non_lazy_bnd_plt; |
5008 | } | |
ee2fdd6f | 5009 | else if (non_lazy_ibt_plt != NULL |
90efb642 | 5010 | && plt->size >= non_lazy_ibt_plt->plt_entry_size |
ee2fdd6f L |
5011 | && (memcmp (plt_contents, |
5012 | non_lazy_ibt_plt->plt_entry, | |
5013 | non_lazy_ibt_plt->plt_got_offset) == 0)) | |
5014 | { | |
5015 | /* Match IBT PLT. */ | |
5016 | plt_type = plt_second; | |
5017 | non_lazy_plt = non_lazy_ibt_plt; | |
5018 | } | |
38b12349 L |
5019 | } |
5020 | ||
5021 | if (plt_type == plt_unknown) | |
37c0b6ee L |
5022 | { |
5023 | free (plt_contents); | |
5024 | continue; | |
5025 | } | |
38b12349 L |
5026 | |
5027 | plts[j].sec = plt; | |
5028 | plts[j].type = plt_type; | |
5029 | ||
5030 | if ((plt_type & plt_lazy)) | |
5031 | { | |
5032 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
5033 | plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size; | |
5034 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
5035 | /* Skip PLT0 in lazy PLT. */ | |
5036 | i = 1; | |
5037 | } | |
5038 | else | |
5039 | { | |
5040 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
5041 | plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size; | |
5042 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
5043 | i = 0; | |
5044 | } | |
5045 | ||
f2c29a16 L |
5046 | /* Skip lazy PLT when the second PLT is used. */ |
5047 | if (plt_type == (plt_lazy | plt_second)) | |
38b12349 L |
5048 | plts[j].count = 0; |
5049 | else | |
5050 | { | |
5051 | n = plt->size / plts[j].plt_entry_size; | |
5052 | plts[j].count = n; | |
5053 | count += n - i; | |
5054 | } | |
5055 | ||
5056 | plts[j].contents = plt_contents; | |
144bed8d L |
5057 | } |
5058 | ||
f493882d L |
5059 | return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize, |
5060 | (bfd_vma) 0, plts, dynsyms, | |
5061 | ret); | |
0ff2b86e L |
5062 | } |
5063 | ||
d2b2c203 DJ |
5064 | /* Handle an x86-64 specific section when reading an object file. This |
5065 | is called when elfcode.h finds a section with an unknown type. */ | |
5066 | ||
5067 | static bfd_boolean | |
0c723101 L |
5068 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
5069 | const char *name, int shindex) | |
d2b2c203 DJ |
5070 | { |
5071 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
5072 | return FALSE; | |
5073 | ||
6dc132d9 | 5074 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
5075 | return FALSE; |
5076 | ||
5077 | return TRUE; | |
5078 | } | |
5079 | ||
3b22753a L |
5080 | /* Hook called by the linker routine which adds symbols from an object |
5081 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
5082 | of .bss. */ | |
5083 | ||
5084 | static bfd_boolean | |
351f65ca | 5085 | elf_x86_64_add_symbol_hook (bfd *abfd, |
a43942db | 5086 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
351f65ca L |
5087 | Elf_Internal_Sym *sym, |
5088 | const char **namep ATTRIBUTE_UNUSED, | |
5089 | flagword *flagsp ATTRIBUTE_UNUSED, | |
5090 | asection **secp, | |
5091 | bfd_vma *valp) | |
3b22753a L |
5092 | { |
5093 | asection *lcomm; | |
5094 | ||
5095 | switch (sym->st_shndx) | |
5096 | { | |
5097 | case SHN_X86_64_LCOMMON: | |
5098 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
5099 | if (lcomm == NULL) | |
5100 | { | |
5101 | lcomm = bfd_make_section_with_flags (abfd, | |
5102 | "LARGE_COMMON", | |
5103 | (SEC_ALLOC | |
5104 | | SEC_IS_COMMON | |
5105 | | SEC_LINKER_CREATED)); | |
5106 | if (lcomm == NULL) | |
5107 | return FALSE; | |
5108 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
5109 | } | |
5110 | *secp = lcomm; | |
5111 | *valp = sym->st_size; | |
c35bdf6e | 5112 | return TRUE; |
3b22753a | 5113 | } |
d8045f23 | 5114 | |
3b22753a L |
5115 | return TRUE; |
5116 | } | |
5117 | ||
5118 | ||
5119 | /* Given a BFD section, try to locate the corresponding ELF section | |
5120 | index. */ | |
5121 | ||
5122 | static bfd_boolean | |
351f65ca L |
5123 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
5124 | asection *sec, int *index_return) | |
3b22753a L |
5125 | { |
5126 | if (sec == &_bfd_elf_large_com_section) | |
5127 | { | |
91d6fa6a | 5128 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
5129 | return TRUE; |
5130 | } | |
5131 | return FALSE; | |
5132 | } | |
5133 | ||
5134 | /* Process a symbol. */ | |
5135 | ||
5136 | static void | |
351f65ca L |
5137 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
5138 | asymbol *asym) | |
3b22753a L |
5139 | { |
5140 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
5141 | ||
5142 | switch (elfsym->internal_elf_sym.st_shndx) | |
5143 | { | |
5144 | case SHN_X86_64_LCOMMON: | |
5145 | asym->section = &_bfd_elf_large_com_section; | |
5146 | asym->value = elfsym->internal_elf_sym.st_size; | |
5147 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
5148 | asym->flags &= ~BSF_GLOBAL; | |
5149 | break; | |
5150 | } | |
5151 | } | |
5152 | ||
5153 | static bfd_boolean | |
351f65ca | 5154 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
5155 | { |
5156 | return (sym->st_shndx == SHN_COMMON | |
5157 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
5158 | } | |
5159 | ||
5160 | static unsigned int | |
351f65ca | 5161 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
5162 | { |
5163 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
5164 | return SHN_COMMON; | |
5165 | else | |
5166 | return SHN_X86_64_LCOMMON; | |
5167 | } | |
5168 | ||
5169 | static asection * | |
351f65ca | 5170 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
5171 | { |
5172 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
5173 | return bfd_com_section_ptr; | |
5174 | else | |
5175 | return &_bfd_elf_large_com_section; | |
5176 | } | |
5177 | ||
5178 | static bfd_boolean | |
5d13b3b3 AM |
5179 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
5180 | const Elf_Internal_Sym *sym, | |
351f65ca | 5181 | asection **psec, |
5d13b3b3 AM |
5182 | bfd_boolean newdef, |
5183 | bfd_boolean olddef, | |
351f65ca | 5184 | bfd *oldbfd, |
5d13b3b3 | 5185 | const asection *oldsec) |
3b22753a L |
5186 | { |
5187 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
5188 | normal common symbol. We turn the large common symbol into a |
5189 | normal one. */ | |
5d13b3b3 | 5190 | if (!olddef |
3b22753a | 5191 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
5192 | && !newdef |
5193 | && bfd_is_com_section (*psec) | |
5194 | && oldsec != *psec) | |
3b22753a | 5195 | { |
00492999 | 5196 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 5197 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
5198 | { |
5199 | h->root.u.c.p->section | |
5200 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
5201 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
5202 | } | |
5203 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
5204 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
5205 | *psec = bfd_com_section_ptr; | |
3b22753a L |
5206 | } |
5207 | ||
5208 | return TRUE; | |
5209 | } | |
5210 | ||
5211 | static int | |
351f65ca L |
5212 | elf_x86_64_additional_program_headers (bfd *abfd, |
5213 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
5214 | { |
5215 | asection *s; | |
9a2e389a | 5216 | int count = 0; |
3b22753a L |
5217 | |
5218 | /* Check to see if we need a large readonly segment. */ | |
5219 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
5220 | if (s && (s->flags & SEC_LOAD)) | |
5221 | count++; | |
5222 | ||
5223 | /* Check to see if we need a large data segment. Since .lbss sections | |
5224 | is placed right after the .bss section, there should be no need for | |
5225 | a large data segment just because of .lbss. */ | |
5226 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
5227 | if (s && (s->flags & SEC_LOAD)) | |
5228 | count++; | |
5229 | ||
5230 | return count; | |
5231 | } | |
5232 | ||
c543bf9a L |
5233 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
5234 | ||
5235 | static bfd_boolean | |
5236 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
5237 | const bfd_target *output) | |
5238 | { | |
5239 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
5240 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
5241 | && _bfd_elf_relocs_compatible (input, output)); | |
5242 | } | |
5243 | ||
38b12349 L |
5244 | /* Set up x86-64 GNU properties. Return the first relocatable ELF input |
5245 | with GNU properties if found. Otherwise, return NULL. */ | |
5246 | ||
5247 | static bfd * | |
5248 | elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info) | |
5249 | { | |
a6798bab | 5250 | struct elf_x86_plt_layout_table plt_layout; |
ee2fdd6f | 5251 | |
a6798bab L |
5252 | plt_layout.is_vxworks = FALSE; |
5253 | if (get_elf_x86_64_backend_data (info->output_bfd)->os == is_normal) | |
73784fa5 | 5254 | { |
a6798bab | 5255 | if (info->bndplt) |
ee2fdd6f | 5256 | { |
a6798bab L |
5257 | plt_layout.lazy_plt = &elf_x86_64_lazy_bnd_plt; |
5258 | plt_layout.non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt; | |
ee2fdd6f L |
5259 | } |
5260 | else | |
5261 | { | |
a6798bab L |
5262 | plt_layout.lazy_plt = &elf_x86_64_lazy_plt; |
5263 | plt_layout.non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
ee2fdd6f | 5264 | } |
38b12349 | 5265 | |
a6798bab | 5266 | if (ABI_64_P (info->output_bfd)) |
38b12349 | 5267 | { |
a6798bab L |
5268 | plt_layout.lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; |
5269 | plt_layout.non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
38b12349 L |
5270 | } |
5271 | else | |
5272 | { | |
a6798bab L |
5273 | plt_layout.lazy_ibt_plt = &elf_x32_lazy_ibt_plt; |
5274 | plt_layout.non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
38b12349 | 5275 | } |
a6798bab | 5276 | plt_layout.normal_target = TRUE; |
38b12349 L |
5277 | } |
5278 | else | |
5279 | { | |
a6798bab L |
5280 | plt_layout.lazy_plt = &elf_x86_64_nacl_plt; |
5281 | plt_layout.non_lazy_plt = NULL; | |
5282 | plt_layout.lazy_ibt_plt = NULL; | |
5283 | plt_layout.non_lazy_ibt_plt = NULL; | |
5284 | plt_layout.normal_target = FALSE; | |
38b12349 L |
5285 | } |
5286 | ||
a6798bab | 5287 | return _bfd_x86_elf_link_setup_gnu_properties (info, &plt_layout); |
38b12349 L |
5288 | } |
5289 | ||
9a2e389a | 5290 | static const struct bfd_elf_special_section |
46bed679 | 5291 | elf_x86_64_special_sections[]= |
3b22753a | 5292 | { |
0112cd26 NC |
5293 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
5294 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
5295 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
5296 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
5297 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
5298 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
5299 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
5300 | }; |
5301 | ||
6d00b590 | 5302 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
5303 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
5304 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 5305 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 5306 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 5307 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 5308 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 5309 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
5310 | |
5311 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 5312 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
5313 | #define elf_backend_want_got_plt 1 |
5314 | #define elf_backend_plt_readonly 1 | |
5315 | #define elf_backend_want_plt_sym 0 | |
5316 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 5317 | #define elf_backend_rela_normal 1 |
e41b3a13 | 5318 | #define elf_backend_plt_alignment 4 |
f7483970 | 5319 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 5320 | #define elf_backend_caches_rawsize 1 |
64f52338 | 5321 | #define elf_backend_dtrel_excludes_plt 1 |
5474d94f | 5322 | #define elf_backend_want_dynrelro 1 |
70256ad8 | 5323 | |
351f65ca | 5324 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 5325 | |
351f65ca | 5326 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 5327 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 5328 | elf_x86_64_reloc_name_lookup |
70256ad8 | 5329 | |
c543bf9a | 5330 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca | 5331 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
38b12349 | 5332 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
351f65ca L |
5333 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections |
5334 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
233cc9c1 | 5335 | #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms |
351f65ca L |
5336 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus |
5337 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
5338 | #ifdef CORE_HEADER |
5339 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
5340 | #endif | |
351f65ca L |
5341 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
5342 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
74541ad4 | 5343 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 5344 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
0ff2b86e | 5345 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 5346 | |
d2b2c203 | 5347 | #define elf_backend_section_from_shdr \ |
351f65ca | 5348 | elf_x86_64_section_from_shdr |
d2b2c203 | 5349 | |
3b22753a | 5350 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 5351 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 5352 | #define elf_backend_add_symbol_hook \ |
351f65ca | 5353 | elf_x86_64_add_symbol_hook |
3b22753a | 5354 | #define elf_backend_symbol_processing \ |
351f65ca | 5355 | elf_x86_64_symbol_processing |
3b22753a | 5356 | #define elf_backend_common_section_index \ |
351f65ca | 5357 | elf_x86_64_common_section_index |
3b22753a | 5358 | #define elf_backend_common_section \ |
351f65ca | 5359 | elf_x86_64_common_section |
3b22753a | 5360 | #define elf_backend_common_definition \ |
351f65ca | 5361 | elf_x86_64_common_definition |
3b22753a | 5362 | #define elf_backend_merge_symbol \ |
351f65ca | 5363 | elf_x86_64_merge_symbol |
3b22753a | 5364 | #define elf_backend_special_sections \ |
351f65ca | 5365 | elf_x86_64_special_sections |
3b22753a | 5366 | #define elf_backend_additional_program_headers \ |
351f65ca | 5367 | elf_x86_64_additional_program_headers |
38b12349 L |
5368 | #define elf_backend_setup_gnu_properties \ |
5369 | elf_x86_64_link_setup_gnu_properties | |
3b22753a | 5370 | |
8d88c4ca | 5371 | #include "elf64-target.h" |
9d7cbccd | 5372 | |
6036f486 ES |
5373 | /* CloudABI support. */ |
5374 | ||
5375 | #undef TARGET_LITTLE_SYM | |
5376 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec | |
5377 | #undef TARGET_LITTLE_NAME | |
5378 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" | |
5379 | ||
5380 | #undef ELF_OSABI | |
5381 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
5382 | ||
5383 | #undef elf64_bed | |
5384 | #define elf64_bed elf64_x86_64_cloudabi_bed | |
5385 | ||
5386 | #include "elf64-target.h" | |
5387 | ||
9d7cbccd NC |
5388 | /* FreeBSD support. */ |
5389 | ||
5390 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5391 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
9d7cbccd NC |
5392 | #undef TARGET_LITTLE_NAME |
5393 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
5394 | ||
d1036acb L |
5395 | #undef ELF_OSABI |
5396 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 5397 | |
9d7cbccd NC |
5398 | #undef elf64_bed |
5399 | #define elf64_bed elf64_x86_64_fbsd_bed | |
5400 | ||
5401 | #include "elf64-target.h" | |
8a9036a4 | 5402 | |
a6cc6b3b RO |
5403 | /* Solaris 2 support. */ |
5404 | ||
5405 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5406 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
5407 | #undef TARGET_LITTLE_NAME |
5408 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
5409 | ||
5410 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
5411 | objects won't be recognized. */ | |
5412 | #undef ELF_OSABI | |
5413 | ||
5414 | #undef elf64_bed | |
5415 | #define elf64_bed elf64_x86_64_sol2_bed | |
5416 | ||
7dc98aea RO |
5417 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
5418 | boundary. */ | |
84865015 | 5419 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
5420 | #define elf_backend_static_tls_alignment 16 |
5421 | ||
a6cc6b3b RO |
5422 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
5423 | ||
5424 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
5425 | File, p.63. */ | |
84865015 | 5426 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
5427 | #define elf_backend_want_plt_sym 1 |
5428 | ||
84865015 NC |
5429 | #undef elf_backend_strtab_flags |
5430 | #define elf_backend_strtab_flags SHF_STRINGS | |
5431 | ||
5432 | static bfd_boolean | |
5522f910 NC |
5433 | elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
5434 | bfd *obfd ATTRIBUTE_UNUSED, | |
5435 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
5436 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
5437 | { |
5438 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
5439 | and sh_link fields of Solaris specific section types. */ | |
5440 | return FALSE; | |
5441 | } | |
5442 | ||
5522f910 NC |
5443 | #undef elf_backend_copy_special_section_fields |
5444 | #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields | |
84865015 | 5445 | |
a6cc6b3b RO |
5446 | #include "elf64-target.h" |
5447 | ||
8059fb19 RM |
5448 | /* Native Client support. */ |
5449 | ||
64b384e1 RM |
5450 | static bfd_boolean |
5451 | elf64_x86_64_nacl_elf_object_p (bfd *abfd) | |
5452 | { | |
5453 | /* Set the right machine number for a NaCl x86-64 ELF64 file. */ | |
5454 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl); | |
5455 | return TRUE; | |
5456 | } | |
5457 | ||
8059fb19 | 5458 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5459 | #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec |
8059fb19 RM |
5460 | #undef TARGET_LITTLE_NAME |
5461 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
5462 | #undef elf64_bed | |
5463 | #define elf64_bed elf64_x86_64_nacl_bed | |
5464 | ||
5465 | #undef ELF_MAXPAGESIZE | |
5466 | #undef ELF_MINPAGESIZE | |
5467 | #undef ELF_COMMONPAGESIZE | |
5468 | #define ELF_MAXPAGESIZE 0x10000 | |
5469 | #define ELF_MINPAGESIZE 0x10000 | |
5470 | #define ELF_COMMONPAGESIZE 0x10000 | |
5471 | ||
5472 | /* Restore defaults. */ | |
5473 | #undef ELF_OSABI | |
5474 | #undef elf_backend_static_tls_alignment | |
5475 | #undef elf_backend_want_plt_sym | |
5476 | #define elf_backend_want_plt_sym 0 | |
84865015 | 5477 | #undef elf_backend_strtab_flags |
5522f910 | 5478 | #undef elf_backend_copy_special_section_fields |
8059fb19 RM |
5479 | |
5480 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
5481 | ||
5482 | #undef elf_backend_plt_alignment | |
5483 | #define elf_backend_plt_alignment 5 | |
5484 | #define NACL_PLT_ENTRY_SIZE 64 | |
5485 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
5486 | ||
5487 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
5488 | { | |
5489 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
5490 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ | |
5491 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
5492 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5493 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
5494 | ||
ea2d813e | 5495 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
70cc877f | 5496 | 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */ |
ea2d813e RM |
5497 | |
5498 | /* 32 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 5499 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 5500 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 5501 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 5502 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 5503 | 0x66, /* excess data16 prefix */ |
ea2d813e | 5504 | 0x90 /* nop */ |
8059fb19 RM |
5505 | }; |
5506 | ||
5507 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
5508 | { | |
5509 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
5510 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
5511 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5512 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
5513 | ||
5514 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
3ddf1bdd | 5515 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
5516 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
5517 | ||
5518 | /* Lazy GOT entries point here (32-byte aligned). */ | |
5519 | 0x68, /* pushq immediate */ | |
5520 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
5521 | 0xe9, /* jmp relative */ | |
5522 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
5523 | ||
5524 | /* 22 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 5525 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
5526 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
5527 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ | |
5528 | }; | |
5529 | ||
5530 | /* .eh_frame covering the .plt section. */ | |
5531 | ||
5532 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
5533 | { | |
5534 | #if (PLT_CIE_LENGTH != 20 \ | |
5535 | || PLT_FDE_LENGTH != 36 \ | |
5536 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
5537 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
5538 | # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!" | |
5539 | #endif | |
5540 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
5541 | 0, 0, 0, 0, /* CIE ID */ | |
5542 | 1, /* CIE version */ | |
5543 | 'z', 'R', 0, /* Augmentation string */ | |
5544 | 1, /* Code alignment factor */ | |
5545 | 0x78, /* Data alignment factor */ | |
5546 | 16, /* Return address column */ | |
5547 | 1, /* Augmentation size */ | |
5548 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
5549 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
5550 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
5551 | DW_CFA_nop, DW_CFA_nop, | |
5552 | ||
5553 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
5554 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
5555 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
5556 | 0, 0, 0, 0, /* .plt size goes here */ | |
5557 | 0, /* Augmentation size */ | |
5558 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
5559 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
5560 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
5561 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
5562 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
5563 | 13, /* Block length */ | |
5564 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
5565 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
5566 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
5567 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
5568 | DW_CFA_nop, DW_CFA_nop | |
5569 | }; | |
5570 | ||
765e526c | 5571 | static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt = |
8059fb19 RM |
5572 | { |
5573 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ | |
765e526c | 5574 | NACL_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
8059fb19 RM |
5575 | elf_x86_64_nacl_plt_entry, /* plt_entry */ |
5576 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
5577 | 2, /* plt0_got1_offset */ | |
5578 | 9, /* plt0_got2_offset */ | |
5579 | 13, /* plt0_got2_insn_end */ | |
5580 | 3, /* plt_got_offset */ | |
5581 | 33, /* plt_reloc_offset */ | |
5582 | 38, /* plt_plt_offset */ | |
5583 | 7, /* plt_got_insn_size */ | |
5584 | 42, /* plt_plt_insn_end */ | |
5585 | 32, /* plt_lazy_offset */ | |
a6798bab L |
5586 | elf_x86_64_nacl_plt0_entry, /* pic_plt0_entry */ |
5587 | elf_x86_64_nacl_plt_entry, /* pic_plt_entry */ | |
8059fb19 | 5588 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ |
38b12349 L |
5589 | sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */ |
5590 | }; | |
5591 | ||
5592 | static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed = | |
5593 | { | |
5594 | is_nacl /* os */ | |
8059fb19 RM |
5595 | }; |
5596 | ||
5597 | #undef elf_backend_arch_data | |
5598 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
5599 | ||
64b384e1 RM |
5600 | #undef elf_backend_object_p |
5601 | #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p | |
5a68afcf RM |
5602 | #undef elf_backend_modify_segment_map |
5603 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
5604 | #undef elf_backend_modify_program_headers | |
5605 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
5606 | #undef elf_backend_final_write_processing |
5607 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 5608 | |
8059fb19 RM |
5609 | #include "elf64-target.h" |
5610 | ||
5611 | /* Native Client x32 support. */ | |
5612 | ||
64b384e1 RM |
5613 | static bfd_boolean |
5614 | elf32_x86_64_nacl_elf_object_p (bfd *abfd) | |
5615 | { | |
5616 | /* Set the right machine number for a NaCl x86-64 ELF32 file. */ | |
5617 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl); | |
5618 | return TRUE; | |
5619 | } | |
5620 | ||
8059fb19 | 5621 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5622 | #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec |
8059fb19 RM |
5623 | #undef TARGET_LITTLE_NAME |
5624 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" | |
5625 | #undef elf32_bed | |
5626 | #define elf32_bed elf32_x86_64_nacl_bed | |
5627 | ||
8059fb19 RM |
5628 | #define bfd_elf32_bfd_reloc_type_lookup \ |
5629 | elf_x86_64_reloc_type_lookup | |
5630 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
5631 | elf_x86_64_reloc_name_lookup | |
b7365e5d L |
5632 | #define bfd_elf32_get_synthetic_symtab \ |
5633 | elf_x86_64_get_synthetic_symtab | |
8059fb19 RM |
5634 | |
5635 | #undef elf_backend_object_p | |
5636 | #define elf_backend_object_p \ | |
64b384e1 | 5637 | elf32_x86_64_nacl_elf_object_p |
8059fb19 RM |
5638 | |
5639 | #undef elf_backend_bfd_from_remote_memory | |
5640 | #define elf_backend_bfd_from_remote_memory \ | |
5641 | _bfd_elf32_bfd_from_remote_memory | |
5642 | ||
5643 | #undef elf_backend_size_info | |
5644 | #define elf_backend_size_info \ | |
5645 | _bfd_elf32_size_info | |
5646 | ||
5647 | #include "elf32-target.h" | |
5648 | ||
5649 | /* Restore defaults. */ | |
5a68afcf | 5650 | #undef elf_backend_object_p |
8059fb19 | 5651 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
5652 | #undef elf_backend_bfd_from_remote_memory |
5653 | #undef elf_backend_size_info | |
5654 | #undef elf_backend_modify_segment_map | |
5655 | #undef elf_backend_modify_program_headers | |
887badb3 | 5656 | #undef elf_backend_final_write_processing |
8059fb19 | 5657 | |
8a9036a4 L |
5658 | /* Intel L1OM support. */ |
5659 | ||
5660 | static bfd_boolean | |
5661 | elf64_l1om_elf_object_p (bfd *abfd) | |
5662 | { | |
5663 | /* Set the right machine number for an L1OM elf64 file. */ | |
5664 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
5665 | return TRUE; | |
5666 | } | |
5667 | ||
5668 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5669 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
5670 | #undef TARGET_LITTLE_NAME |
5671 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
5672 | #undef ELF_ARCH | |
5673 | #define ELF_ARCH bfd_arch_l1om | |
5674 | ||
5675 | #undef ELF_MACHINE_CODE | |
5676 | #define ELF_MACHINE_CODE EM_L1OM | |
5677 | ||
5678 | #undef ELF_OSABI | |
5679 | ||
5680 | #undef elf64_bed | |
5681 | #define elf64_bed elf64_l1om_bed | |
5682 | ||
5683 | #undef elf_backend_object_p | |
5684 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
5685 | ||
8059fb19 RM |
5686 | /* Restore defaults. */ |
5687 | #undef ELF_MAXPAGESIZE | |
5688 | #undef ELF_MINPAGESIZE | |
5689 | #undef ELF_COMMONPAGESIZE | |
5690 | #define ELF_MAXPAGESIZE 0x200000 | |
5691 | #define ELF_MINPAGESIZE 0x1000 | |
5692 | #define ELF_COMMONPAGESIZE 0x1000 | |
5693 | #undef elf_backend_plt_alignment | |
5694 | #define elf_backend_plt_alignment 4 | |
5695 | #undef elf_backend_arch_data | |
5696 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 5697 | |
8a9036a4 L |
5698 | #include "elf64-target.h" |
5699 | ||
5700 | /* FreeBSD L1OM support. */ | |
5701 | ||
5702 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5703 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
5704 | #undef TARGET_LITTLE_NAME |
5705 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
5706 | ||
5707 | #undef ELF_OSABI | |
5708 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5709 | ||
5710 | #undef elf64_bed | |
5711 | #define elf64_bed elf64_l1om_fbsd_bed | |
5712 | ||
8a9036a4 | 5713 | #include "elf64-target.h" |
351f65ca | 5714 | |
7a9068fe L |
5715 | /* Intel K1OM support. */ |
5716 | ||
5717 | static bfd_boolean | |
5718 | elf64_k1om_elf_object_p (bfd *abfd) | |
5719 | { | |
5720 | /* Set the right machine number for an K1OM elf64 file. */ | |
5721 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
5722 | return TRUE; | |
5723 | } | |
5724 | ||
5725 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5726 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
5727 | #undef TARGET_LITTLE_NAME |
5728 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
5729 | #undef ELF_ARCH | |
5730 | #define ELF_ARCH bfd_arch_k1om | |
5731 | ||
5732 | #undef ELF_MACHINE_CODE | |
5733 | #define ELF_MACHINE_CODE EM_K1OM | |
5734 | ||
5735 | #undef ELF_OSABI | |
5736 | ||
5737 | #undef elf64_bed | |
5738 | #define elf64_bed elf64_k1om_bed | |
5739 | ||
5740 | #undef elf_backend_object_p | |
5741 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
5742 | ||
5743 | #undef elf_backend_static_tls_alignment | |
5744 | ||
5745 | #undef elf_backend_want_plt_sym | |
5746 | #define elf_backend_want_plt_sym 0 | |
5747 | ||
5748 | #include "elf64-target.h" | |
5749 | ||
5750 | /* FreeBSD K1OM support. */ | |
5751 | ||
5752 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5753 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
5754 | #undef TARGET_LITTLE_NAME |
5755 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
5756 | ||
5757 | #undef ELF_OSABI | |
5758 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5759 | ||
5760 | #undef elf64_bed | |
5761 | #define elf64_bed elf64_k1om_fbsd_bed | |
5762 | ||
5763 | #include "elf64-target.h" | |
5764 | ||
351f65ca L |
5765 | /* 32bit x86-64 support. */ |
5766 | ||
351f65ca | 5767 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5768 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
5769 | #undef TARGET_LITTLE_NAME |
5770 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 5771 | #undef elf32_bed |
351f65ca L |
5772 | |
5773 | #undef ELF_ARCH | |
5774 | #define ELF_ARCH bfd_arch_i386 | |
5775 | ||
5776 | #undef ELF_MACHINE_CODE | |
5777 | #define ELF_MACHINE_CODE EM_X86_64 | |
5778 | ||
351f65ca L |
5779 | #undef ELF_OSABI |
5780 | ||
351f65ca L |
5781 | #undef elf_backend_object_p |
5782 | #define elf_backend_object_p \ | |
5783 | elf32_x86_64_elf_object_p | |
5784 | ||
5785 | #undef elf_backend_bfd_from_remote_memory | |
5786 | #define elf_backend_bfd_from_remote_memory \ | |
5787 | _bfd_elf32_bfd_from_remote_memory | |
5788 | ||
5789 | #undef elf_backend_size_info | |
5790 | #define elf_backend_size_info \ | |
5791 | _bfd_elf32_size_info | |
5792 | ||
5793 | #include "elf32-target.h" |