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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 | |
1441 | elf_x86_64_convert_load_reloc (bfd *abfd, asection *sec, | |
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 L |
1449 | bfd_boolean is_pic; |
1450 | bfd_boolean require_reloc_pc32; | |
1451 | bfd_boolean relocx; | |
1452 | bfd_boolean to_reloc_pc32; | |
1453 | asection *tsec; | |
1454 | char symtype; | |
1455 | bfd_signed_vma raddend; | |
1456 | unsigned int opcode; | |
1457 | unsigned int modrm; | |
1458 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
1459 | unsigned int r_symndx; | |
1460 | bfd_vma toff; | |
1461 | bfd_vma roff = irel->r_offset; | |
1462 | ||
1463 | if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2)) | |
1464 | return TRUE; | |
1465 | ||
1466 | raddend = irel->r_addend; | |
1467 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
1468 | if (raddend != -4) | |
1469 | return TRUE; | |
1470 | ||
0afcef53 | 1471 | htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA); |
c175a657 L |
1472 | is_pic = bfd_link_pic (link_info); |
1473 | ||
1474 | relocx = (r_type == R_X86_64_GOTPCRELX | |
1475 | || r_type == R_X86_64_REX_GOTPCRELX); | |
1476 | ||
1477 | /* TRUE if we can convert only to R_X86_64_PC32. Enable it for | |
1478 | --no-relax. */ | |
1479 | require_reloc_pc32 | |
1480 | = link_info->disable_target_specific_optimizations > 1; | |
1481 | ||
1482 | r_symndx = htab->r_sym (irel->r_info); | |
1483 | ||
1484 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1485 | ||
1486 | /* Convert mov to lea since it has been done for a while. */ | |
1487 | if (opcode != 0x8b) | |
1488 | { | |
1489 | /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX | |
1490 | for call, jmp or one of adc, add, and, cmp, or, sbb, sub, | |
1491 | test, xor instructions. */ | |
1492 | if (!relocx) | |
1493 | return TRUE; | |
1494 | } | |
1495 | ||
1496 | /* We convert only to R_X86_64_PC32: | |
1497 | 1. Branch. | |
1498 | 2. R_X86_64_GOTPCREL since we can't modify REX byte. | |
1499 | 3. require_reloc_pc32 is true. | |
1500 | 4. PIC. | |
1501 | */ | |
1502 | to_reloc_pc32 = (opcode == 0xff | |
1503 | || !relocx | |
1504 | || require_reloc_pc32 | |
1505 | || is_pic); | |
1506 | ||
1507 | /* Get the symbol referred to by the reloc. */ | |
1508 | if (h == NULL) | |
1509 | { | |
1510 | Elf_Internal_Sym *isym | |
1511 | = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx); | |
1512 | ||
1513 | /* Skip relocation against undefined symbols. */ | |
1514 | if (isym->st_shndx == SHN_UNDEF) | |
1515 | return TRUE; | |
1516 | ||
1517 | symtype = ELF_ST_TYPE (isym->st_info); | |
1518 | ||
1519 | if (isym->st_shndx == SHN_ABS) | |
1520 | tsec = bfd_abs_section_ptr; | |
1521 | else if (isym->st_shndx == SHN_COMMON) | |
1522 | tsec = bfd_com_section_ptr; | |
1523 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
1524 | tsec = &_bfd_elf_large_com_section; | |
1525 | else | |
1526 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1527 | ||
1528 | toff = isym->st_value; | |
1529 | } | |
1530 | else | |
1531 | { | |
1532 | /* Undefined weak symbol is only bound locally in executable | |
1533 | and its reference is resolved as 0 without relocation | |
1534 | overflow. We can only perform this optimization for | |
1535 | GOTPCRELX relocations since we need to modify REX byte. | |
1536 | It is OK convert mov with R_X86_64_GOTPCREL to | |
1537 | R_X86_64_PC32. */ | |
1538 | if ((relocx || opcode == 0x8b) | |
1539 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, | |
0afcef53 | 1540 | X86_64_ELF_DATA, |
c175a657 | 1541 | TRUE, |
0afcef53 | 1542 | elf_x86_hash_entry (h))) |
c175a657 L |
1543 | { |
1544 | if (opcode == 0xff) | |
1545 | { | |
1546 | /* Skip for branch instructions since R_X86_64_PC32 | |
1547 | may overflow. */ | |
1548 | if (require_reloc_pc32) | |
1549 | return TRUE; | |
1550 | } | |
1551 | else if (relocx) | |
1552 | { | |
1553 | /* For non-branch instructions, we can convert to | |
1554 | R_X86_64_32/R_X86_64_32S since we know if there | |
1555 | is a REX byte. */ | |
1556 | to_reloc_pc32 = FALSE; | |
1557 | } | |
1558 | ||
1559 | /* Since we don't know the current PC when PIC is true, | |
1560 | we can't convert to R_X86_64_PC32. */ | |
1561 | if (to_reloc_pc32 && is_pic) | |
1562 | return TRUE; | |
1563 | ||
1564 | goto convert; | |
1565 | } | |
1566 | /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since | |
1567 | ld.so may use its link-time address. */ | |
cbd0eecf L |
1568 | else if (h->start_stop |
1569 | || ((h->def_regular | |
1570 | || h->root.type == bfd_link_hash_defined | |
1571 | || h->root.type == bfd_link_hash_defweak) | |
1572 | && h != htab->elf.hdynamic | |
1573 | && SYMBOL_REFERENCES_LOCAL (link_info, h))) | |
c175a657 L |
1574 | { |
1575 | /* bfd_link_hash_new or bfd_link_hash_undefined is | |
1576 | set by an assignment in a linker script in | |
cbd0eecf L |
1577 | bfd_elf_record_link_assignment. start_stop is set |
1578 | on __start_SECNAME/__stop_SECNAME which mark section | |
1579 | SECNAME. */ | |
1580 | if (h->start_stop | |
1581 | || (h->def_regular | |
1582 | && (h->root.type == bfd_link_hash_new | |
1583 | || h->root.type == bfd_link_hash_undefined | |
1584 | || ((h->root.type == bfd_link_hash_defined | |
1585 | || h->root.type == bfd_link_hash_defweak) | |
1586 | && h->root.u.def.section == bfd_und_section_ptr)))) | |
c175a657 L |
1587 | { |
1588 | /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */ | |
1589 | if (require_reloc_pc32) | |
1590 | return TRUE; | |
1591 | goto convert; | |
1592 | } | |
1593 | tsec = h->root.u.def.section; | |
1594 | toff = h->root.u.def.value; | |
1595 | symtype = h->type; | |
1596 | } | |
1597 | else | |
1598 | return TRUE; | |
1599 | } | |
1600 | ||
2168b268 L |
1601 | /* Don't convert GOTPCREL relocation against large section. */ |
1602 | if (elf_section_data (tsec) != NULL | |
1603 | && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0) | |
1604 | return TRUE; | |
1605 | ||
c175a657 L |
1606 | /* We can only estimate relocation overflow for R_X86_64_PC32. */ |
1607 | if (!to_reloc_pc32) | |
1608 | goto convert; | |
1609 | ||
1610 | if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE) | |
1611 | { | |
1612 | /* At this stage in linking, no SEC_MERGE symbol has been | |
1613 | adjusted, so all references to such symbols need to be | |
1614 | passed through _bfd_merged_section_offset. (Later, in | |
1615 | relocate_section, all SEC_MERGE symbols *except* for | |
1616 | section symbols have been adjusted.) | |
1617 | ||
1618 | gas may reduce relocations against symbols in SEC_MERGE | |
1619 | sections to a relocation against the section symbol when | |
1620 | the original addend was zero. When the reloc is against | |
1621 | a section symbol we should include the addend in the | |
1622 | offset passed to _bfd_merged_section_offset, since the | |
1623 | location of interest is the original symbol. On the | |
1624 | other hand, an access to "sym+addend" where "sym" is not | |
1625 | a section symbol should not include the addend; Such an | |
1626 | access is presumed to be an offset from "sym"; The | |
1627 | location of interest is just "sym". */ | |
1628 | if (symtype == STT_SECTION) | |
1629 | toff += raddend; | |
1630 | ||
1631 | toff = _bfd_merged_section_offset (abfd, &tsec, | |
1632 | elf_section_data (tsec)->sec_info, | |
1633 | toff); | |
1634 | ||
1635 | if (symtype != STT_SECTION) | |
1636 | toff += raddend; | |
1637 | } | |
1638 | else | |
1639 | toff += raddend; | |
1640 | ||
1641 | /* Don't convert if R_X86_64_PC32 relocation overflows. */ | |
1642 | if (tsec->output_section == sec->output_section) | |
1643 | { | |
1644 | if ((toff - roff + 0x80000000) > 0xffffffff) | |
1645 | return TRUE; | |
1646 | } | |
1647 | else | |
1648 | { | |
1649 | bfd_signed_vma distance; | |
1650 | ||
1651 | /* At this point, we don't know the load addresses of TSEC | |
1652 | section nor SEC section. We estimate the distrance between | |
1653 | SEC and TSEC. We store the estimated distances in the | |
1654 | compressed_size field of the output section, which is only | |
1655 | used to decompress the compressed input section. */ | |
1656 | if (sec->output_section->compressed_size == 0) | |
1657 | { | |
1658 | asection *asect; | |
1659 | bfd_size_type size = 0; | |
1660 | for (asect = link_info->output_bfd->sections; | |
1661 | asect != NULL; | |
1662 | asect = asect->next) | |
1663 | /* Skip debug sections since compressed_size is used to | |
1664 | compress debug sections. */ | |
1665 | if ((asect->flags & SEC_DEBUGGING) == 0) | |
1666 | { | |
1667 | asection *i; | |
1668 | for (i = asect->map_head.s; | |
1669 | i != NULL; | |
1670 | i = i->map_head.s) | |
1671 | { | |
1672 | size = align_power (size, i->alignment_power); | |
1673 | size += i->size; | |
1674 | } | |
1675 | asect->compressed_size = size; | |
1676 | } | |
1677 | } | |
1678 | ||
1679 | /* Don't convert GOTPCREL relocations if TSEC isn't placed | |
1680 | after SEC. */ | |
1681 | distance = (tsec->output_section->compressed_size | |
1682 | - sec->output_section->compressed_size); | |
1683 | if (distance < 0) | |
1684 | return TRUE; | |
1685 | ||
1686 | /* Take PT_GNU_RELRO segment into account by adding | |
1687 | maxpagesize. */ | |
1688 | if ((toff + distance + get_elf_backend_data (abfd)->maxpagesize | |
1689 | - roff + 0x80000000) > 0xffffffff) | |
1690 | return TRUE; | |
1691 | } | |
1692 | ||
1693 | convert: | |
1694 | if (opcode == 0xff) | |
1695 | { | |
1696 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
1697 | unsigned int nop; | |
1698 | unsigned int disp; | |
1699 | bfd_vma nop_offset; | |
1700 | ||
1701 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
1702 | R_X86_64_PC32. */ | |
1703 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1704 | if (modrm == 0x25) | |
1705 | { | |
1706 | /* Convert to "jmp foo nop". */ | |
1707 | modrm = 0xe9; | |
1708 | nop = NOP_OPCODE; | |
1709 | nop_offset = irel->r_offset + 3; | |
1710 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1711 | irel->r_offset -= 1; | |
1712 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1713 | } | |
1714 | else | |
1715 | { | |
0afcef53 L |
1716 | struct elf_x86_link_hash_entry *eh |
1717 | = (struct elf_x86_link_hash_entry *) h; | |
e2cbcd91 | 1718 | |
c175a657 L |
1719 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
1720 | is a nop prefix. */ | |
1721 | modrm = 0xe8; | |
e2cbcd91 L |
1722 | /* To support TLS optimization, always use addr32 prefix for |
1723 | "call *__tls_get_addr@GOTPCREL(%rip)". */ | |
1d4af308 | 1724 | if (eh && eh->tls_get_addr) |
c175a657 | 1725 | { |
e2cbcd91 L |
1726 | nop = 0x67; |
1727 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1728 | } |
1729 | else | |
e2cbcd91 L |
1730 | { |
1731 | nop = link_info->call_nop_byte; | |
1732 | if (link_info->call_nop_as_suffix) | |
1733 | { | |
1734 | nop_offset = irel->r_offset + 3; | |
1735 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1736 | irel->r_offset -= 1; | |
1737 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1738 | } | |
1739 | else | |
1740 | nop_offset = irel->r_offset - 2; | |
1741 | } | |
c175a657 L |
1742 | } |
1743 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1744 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1745 | r_type = R_X86_64_PC32; | |
1746 | } | |
1747 | else | |
1748 | { | |
1749 | unsigned int rex; | |
1750 | unsigned int rex_mask = REX_R; | |
1751 | ||
1752 | if (r_type == R_X86_64_REX_GOTPCRELX) | |
1753 | rex = bfd_get_8 (abfd, contents + roff - 3); | |
1754 | else | |
1755 | rex = 0; | |
1756 | ||
1757 | if (opcode == 0x8b) | |
1758 | { | |
1759 | if (to_reloc_pc32) | |
1760 | { | |
1761 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1762 | "lea foo(%rip), %reg". */ | |
1763 | opcode = 0x8d; | |
1764 | r_type = R_X86_64_PC32; | |
1765 | } | |
1766 | else | |
1767 | { | |
1768 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1769 | "mov $foo, %reg". */ | |
1770 | opcode = 0xc7; | |
1771 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1772 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1773 | if ((rex & REX_W) != 0 | |
1774 | && ABI_64_P (link_info->output_bfd)) | |
1775 | { | |
1776 | /* Keep the REX_W bit in REX byte for LP64. */ | |
1777 | r_type = R_X86_64_32S; | |
1778 | goto rewrite_modrm_rex; | |
1779 | } | |
1780 | else | |
1781 | { | |
1782 | /* If the REX_W bit in REX byte isn't needed, | |
1783 | use R_X86_64_32 and clear the W bit to avoid | |
1784 | sign-extend imm32 to imm64. */ | |
1785 | r_type = R_X86_64_32; | |
1786 | /* Clear the W bit in REX byte. */ | |
1787 | rex_mask |= REX_W; | |
1788 | goto rewrite_modrm_rex; | |
1789 | } | |
1790 | } | |
1791 | } | |
1792 | else | |
1793 | { | |
1794 | /* R_X86_64_PC32 isn't supported. */ | |
1795 | if (to_reloc_pc32) | |
1796 | return TRUE; | |
1797 | ||
1798 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1799 | if (opcode == 0x85) | |
1800 | { | |
1801 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
1802 | "test $foo, %reg". */ | |
1803 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1804 | opcode = 0xf7; | |
1805 | } | |
1806 | else | |
1807 | { | |
1808 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
1809 | "binop $foo, %reg". */ | |
1810 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
1811 | opcode = 0x81; | |
1812 | } | |
1813 | ||
1814 | /* Use R_X86_64_32 with 32-bit operand to avoid relocation | |
1815 | overflow when sign-extending imm32 to imm64. */ | |
1816 | r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32; | |
1817 | ||
1818 | rewrite_modrm_rex: | |
1819 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1820 | ||
1821 | if (rex) | |
1822 | { | |
1823 | /* Move the R bit to the B bit in REX byte. */ | |
1824 | rex = (rex & ~rex_mask) | (rex & REX_R) >> 2; | |
1825 | bfd_put_8 (abfd, rex, contents + roff - 3); | |
1826 | } | |
1827 | ||
1828 | /* No addend for R_X86_64_32/R_X86_64_32S relocations. */ | |
1829 | irel->r_addend = 0; | |
1830 | } | |
1831 | ||
1832 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1833 | } | |
1834 | ||
1835 | irel->r_info = htab->r_info (r_symndx, r_type); | |
1836 | ||
1837 | *converted = TRUE; | |
1838 | ||
1839 | return TRUE; | |
1840 | } | |
1841 | ||
70256ad8 | 1842 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1843 | calculate needed space in the global offset table, procedure |
1844 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1845 | |
b34976b6 | 1846 | static bfd_boolean |
351f65ca L |
1847 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1848 | asection *sec, | |
1849 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1850 | { |
0afcef53 | 1851 | struct elf_x86_link_hash_table *htab; |
70256ad8 AJ |
1852 | Elf_Internal_Shdr *symtab_hdr; |
1853 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1854 | const Elf_Internal_Rela *rel; |
1855 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 1856 | asection *sreloc; |
bedfd056 | 1857 | bfd_byte *contents; |
70256ad8 | 1858 | |
0e1862bb | 1859 | if (bfd_link_relocatable (info)) |
b34976b6 | 1860 | return TRUE; |
70256ad8 | 1861 | |
081b1afe L |
1862 | /* Don't do anything special with non-loaded, non-alloced sections. |
1863 | In particular, any relocs in such sections should not affect GOT | |
1864 | and PLT reference counting (ie. we don't allow them to create GOT | |
1865 | or PLT entries), there's no possibility or desire to optimize TLS | |
1866 | relocs, and there's not much point in propagating relocs to shared | |
1867 | libs that the dynamic linker won't relocate. */ | |
1868 | if ((sec->flags & SEC_ALLOC) == 0) | |
1869 | return TRUE; | |
1870 | ||
0afcef53 | 1871 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 | 1872 | if (htab == NULL) |
afd9acee L |
1873 | { |
1874 | sec->check_relocs_failed = 1; | |
1875 | return FALSE; | |
1876 | } | |
4dfe6ac6 | 1877 | |
fe53b4a4 L |
1878 | BFD_ASSERT (is_x86_elf (abfd, htab)); |
1879 | ||
bedfd056 L |
1880 | /* Get the section contents. */ |
1881 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1882 | contents = elf_section_data (sec)->this_hdr.contents; | |
1883 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1884 | { | |
1885 | sec->check_relocs_failed = 1; | |
1886 | return FALSE; | |
1887 | } | |
1888 | ||
0ffa91dd | 1889 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1890 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1891 | |
c434dee6 | 1892 | sreloc = NULL; |
cbe950e9 | 1893 | |
70256ad8 AJ |
1894 | rel_end = relocs + sec->reloc_count; |
1895 | for (rel = relocs; rel < rel_end; rel++) | |
1896 | { | |
bffbf940 | 1897 | unsigned int r_type; |
d42c267e | 1898 | unsigned int r_symndx; |
70256ad8 | 1899 | struct elf_link_hash_entry *h; |
0afcef53 | 1900 | struct elf_x86_link_hash_entry *eh; |
4c544807 L |
1901 | Elf_Internal_Sym *isym; |
1902 | const char *name; | |
06a6a421 | 1903 | bfd_boolean size_reloc; |
70256ad8 | 1904 | |
351f65ca L |
1905 | r_symndx = htab->r_sym (rel->r_info); |
1906 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1907 | |
1908 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1909 | { | |
695344c0 | 1910 | /* xgettext:c-format */ |
4eca0228 AM |
1911 | _bfd_error_handler (_("%B: bad symbol index: %d"), |
1912 | abfd, r_symndx); | |
afd9acee | 1913 | goto error_return; |
c434dee6 AJ |
1914 | } |
1915 | ||
70256ad8 | 1916 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1917 | { |
1918 | /* A local symbol. */ | |
c2e61a4e L |
1919 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1920 | abfd, r_symndx); | |
1921 | if (isym == NULL) | |
afd9acee | 1922 | goto error_return; |
c25bc9fc L |
1923 | |
1924 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1925 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1926 | { |
0afcef53 L |
1927 | h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, |
1928 | TRUE); | |
c25bc9fc | 1929 | if (h == NULL) |
afd9acee | 1930 | goto error_return; |
6bbec505 | 1931 | |
c25bc9fc | 1932 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
1933 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
1934 | isym, NULL); | |
c25bc9fc L |
1935 | h->type = STT_GNU_IFUNC; |
1936 | h->def_regular = 1; | |
1937 | h->ref_regular = 1; | |
1938 | h->forced_local = 1; | |
1939 | h->root.type = bfd_link_hash_defined; | |
1940 | } | |
1941 | else | |
1942 | h = NULL; | |
1943 | } | |
70256ad8 | 1944 | else |
71cb9464 | 1945 | { |
4c544807 | 1946 | isym = NULL; |
71cb9464 L |
1947 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1948 | while (h->root.type == bfd_link_hash_indirect | |
1949 | || h->root.type == bfd_link_hash_warning) | |
1950 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1951 | } |
cbe950e9 | 1952 | |
d1534d16 L |
1953 | /* Check invalid x32 relocations. */ |
1954 | if (!ABI_64_P (abfd)) | |
1955 | switch (r_type) | |
1956 | { | |
1957 | default: | |
1958 | break; | |
1959 | ||
d1534d16 L |
1960 | case R_X86_64_DTPOFF64: |
1961 | case R_X86_64_TPOFF64: | |
1962 | case R_X86_64_PC64: | |
1963 | case R_X86_64_GOTOFF64: | |
1964 | case R_X86_64_GOT64: | |
1965 | case R_X86_64_GOTPCREL64: | |
1966 | case R_X86_64_GOTPC64: | |
1967 | case R_X86_64_GOTPLT64: | |
1968 | case R_X86_64_PLTOFF64: | |
1969 | { | |
1970 | if (h) | |
1971 | name = h->root.root.string; | |
1972 | else | |
1973 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1974 | NULL); | |
4eca0228 | 1975 | _bfd_error_handler |
695344c0 | 1976 | /* xgettext:c-format */ |
d1534d16 L |
1977 | (_("%B: relocation %s against symbol `%s' isn't " |
1978 | "supported in x32 mode"), abfd, | |
1979 | x86_64_elf_howto_table[r_type].name, name); | |
1980 | bfd_set_error (bfd_error_bad_value); | |
afd9acee | 1981 | goto error_return; |
d1534d16 L |
1982 | } |
1983 | break; | |
1984 | } | |
1985 | ||
c25bc9fc L |
1986 | if (h != NULL) |
1987 | { | |
ad1e85de L |
1988 | /* It is referenced by a non-shared object. */ |
1989 | h->ref_regular = 1; | |
bc4e12de | 1990 | h->root.non_ir_ref_regular = 1; |
13a2df29 L |
1991 | |
1992 | if (h->type == STT_GNU_IFUNC) | |
1993 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
1994 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 1995 | } |
70256ad8 | 1996 | |
bedfd056 | 1997 | if (! elf_x86_64_tls_transition (info, abfd, sec, contents, |
351f65ca L |
1998 | symtab_hdr, sym_hashes, |
1999 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 2000 | rel, rel_end, h, r_symndx, FALSE)) |
afd9acee | 2001 | goto error_return; |
142411ca | 2002 | |
0afcef53 | 2003 | eh = (struct elf_x86_link_hash_entry *) h; |
bffbf940 | 2004 | switch (r_type) |
70256ad8 | 2005 | { |
bffbf940 | 2006 | case R_X86_64_TLSLD: |
0afcef53 | 2007 | htab->tls_ld_or_ldm_got.refcount += 1; |
bffbf940 JJ |
2008 | goto create_got; |
2009 | ||
2010 | case R_X86_64_TPOFF32: | |
0e1862bb | 2011 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
aab921ad | 2012 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2013 | &x86_64_elf_howto_table[r_type]); |
aec6b87e L |
2014 | if (eh != NULL) |
2015 | eh->has_got_reloc = 1; | |
bffbf940 | 2016 | break; |
c434dee6 | 2017 | |
bffbf940 | 2018 | case R_X86_64_GOTTPOFF: |
0e1862bb | 2019 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
2020 | info->flags |= DF_STATIC_TLS; |
2021 | /* Fall through */ | |
70256ad8 | 2022 | |
bffbf940 JJ |
2023 | case R_X86_64_GOT32: |
2024 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
2025 | case R_X86_64_GOTPCRELX: |
2026 | case R_X86_64_REX_GOTPCRELX: | |
bffbf940 | 2027 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
2028 | case R_X86_64_GOT64: |
2029 | case R_X86_64_GOTPCREL64: | |
2030 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
2031 | case R_X86_64_GOTPC32_TLSDESC: |
2032 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
2033 | /* This symbol requires a global offset table entry. */ |
2034 | { | |
2035 | int tls_type, old_tls_type; | |
2036 | ||
2037 | switch (r_type) | |
2038 | { | |
2039 | default: tls_type = GOT_NORMAL; break; | |
2040 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
2041 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
2042 | case R_X86_64_GOTPC32_TLSDESC: |
2043 | case R_X86_64_TLSDESC_CALL: | |
2044 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
2045 | } |
2046 | ||
2047 | if (h != NULL) | |
2048 | { | |
2049 | h->got.refcount += 1; | |
aec6b87e | 2050 | old_tls_type = eh->tls_type; |
bffbf940 JJ |
2051 | } |
2052 | else | |
2053 | { | |
2054 | bfd_signed_vma *local_got_refcounts; | |
2055 | ||
2056 | /* This is a global offset table entry for a local symbol. */ | |
2057 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2058 | if (local_got_refcounts == NULL) | |
2059 | { | |
2060 | bfd_size_type size; | |
2061 | ||
2062 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
2063 | size *= sizeof (bfd_signed_vma) |
2064 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
2065 | local_got_refcounts = ((bfd_signed_vma *) |
2066 | bfd_zalloc (abfd, size)); | |
2067 | if (local_got_refcounts == NULL) | |
afd9acee | 2068 | goto error_return; |
bffbf940 | 2069 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
0afcef53 | 2070 | elf_x86_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 2071 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
0afcef53 | 2072 | elf_x86_local_got_tls_type (abfd) |
67a4f2b7 | 2073 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
2074 | } |
2075 | local_got_refcounts[r_symndx] += 1; | |
2076 | old_tls_type | |
0afcef53 | 2077 | = elf_x86_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
2078 | } |
2079 | ||
2080 | /* If a TLS symbol is accessed using IE at least once, | |
2081 | there is no point to use dynamic model for it. */ | |
2082 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
2083 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
2084 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 2085 | { |
67a4f2b7 | 2086 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 2087 | tls_type = old_tls_type; |
67a4f2b7 AO |
2088 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2089 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2090 | tls_type |= old_tls_type; | |
bffbf940 JJ |
2091 | else |
2092 | { | |
09a24cbf | 2093 | if (h) |
4c544807 L |
2094 | name = h->root.root.string; |
2095 | else | |
2096 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
2097 | isym, NULL); | |
4eca0228 | 2098 | _bfd_error_handler |
695344c0 | 2099 | /* xgettext:c-format */ |
63a5468a AM |
2100 | (_("%B: '%s' accessed both as normal and" |
2101 | " thread local symbol"), | |
4c544807 | 2102 | abfd, name); |
68c4a57e | 2103 | bfd_set_error (bfd_error_bad_value); |
afd9acee | 2104 | goto error_return; |
bffbf940 JJ |
2105 | } |
2106 | } | |
2107 | ||
2108 | if (old_tls_type != tls_type) | |
2109 | { | |
aec6b87e L |
2110 | if (eh != NULL) |
2111 | eh->tls_type = tls_type; | |
bffbf940 | 2112 | else |
0afcef53 | 2113 | elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
2114 | } |
2115 | } | |
c434dee6 AJ |
2116 | /* Fall through */ |
2117 | ||
d6ab8113 JB |
2118 | case R_X86_64_GOTOFF64: |
2119 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2120 | case R_X86_64_GOTPC64: |
bffbf940 | 2121 | create_got: |
aec6b87e L |
2122 | if (eh != NULL) |
2123 | eh->has_got_reloc = 1; | |
70256ad8 AJ |
2124 | break; |
2125 | ||
2126 | case R_X86_64_PLT32: | |
c3320543 | 2127 | case R_X86_64_PLT32_BND: |
70256ad8 | 2128 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
2129 | actually build the entry in adjust_dynamic_symbol, |
2130 | because this might be a case of linking PIC code which is | |
2131 | never referenced by a dynamic object, in which case we | |
2132 | don't need to generate a procedure linkage table entry | |
2133 | after all. */ | |
70256ad8 AJ |
2134 | |
2135 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 2136 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
2137 | if (h == NULL) |
2138 | continue; | |
2139 | ||
aec6b87e | 2140 | eh->has_got_reloc = 1; |
f5385ebf | 2141 | h->needs_plt = 1; |
51b64d56 | 2142 | h->plt.refcount += 1; |
70256ad8 AJ |
2143 | break; |
2144 | ||
7b81dfbb AJ |
2145 | case R_X86_64_PLTOFF64: |
2146 | /* This tries to form the 'address' of a function relative | |
2147 | to GOT. For global symbols we need a PLT entry. */ | |
2148 | if (h != NULL) | |
2149 | { | |
2150 | h->needs_plt = 1; | |
2151 | h->plt.refcount += 1; | |
2152 | } | |
2153 | goto create_got; | |
2154 | ||
6a3e1bae L |
2155 | case R_X86_64_SIZE32: |
2156 | case R_X86_64_SIZE64: | |
06a6a421 | 2157 | size_reloc = TRUE; |
6a3e1bae L |
2158 | goto do_size; |
2159 | ||
248775ba L |
2160 | case R_X86_64_32: |
2161 | if (!ABI_64_P (abfd)) | |
2162 | goto pointer; | |
1a0670f3 | 2163 | /* Fall through. */ |
cc78d0af AJ |
2164 | case R_X86_64_8: |
2165 | case R_X86_64_16: | |
70256ad8 | 2166 | case R_X86_64_32S: |
338c190a L |
2167 | /* Check relocation overflow as these relocs may lead to |
2168 | run-time relocation overflow. Don't error out for | |
1b71fb54 | 2169 | sections we don't care about, such as debug sections or |
338c190a | 2170 | when relocation overflow check is disabled. */ |
4c10bbaa | 2171 | if (!info->no_reloc_overflow_check |
338c190a L |
2172 | && (bfd_link_pic (info) |
2173 | || (bfd_link_executable (info) | |
2174 | && h != NULL | |
2175 | && !h->def_regular | |
2176 | && h->def_dynamic | |
081b1afe | 2177 | && (sec->flags & SEC_READONLY) == 0))) |
aab921ad | 2178 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2179 | &x86_64_elf_howto_table[r_type]); |
1b71fb54 AJ |
2180 | /* Fall through. */ |
2181 | ||
c434dee6 AJ |
2182 | case R_X86_64_PC8: |
2183 | case R_X86_64_PC16: | |
70256ad8 | 2184 | case R_X86_64_PC32: |
c3320543 | 2185 | case R_X86_64_PC32_BND: |
d6ab8113 | 2186 | case R_X86_64_PC64: |
1b71fb54 | 2187 | case R_X86_64_64: |
248775ba | 2188 | pointer: |
aec6b87e L |
2189 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
2190 | eh->has_non_got_reloc = 1; | |
bf52d7c7 L |
2191 | /* We are called after all symbols have been resolved. Only |
2192 | relocation against STT_GNU_IFUNC symbol must go through | |
2193 | PLT. */ | |
d1ed1c7d L |
2194 | if (h != NULL |
2195 | && (bfd_link_executable (info) | |
bf52d7c7 | 2196 | || h->type == STT_GNU_IFUNC)) |
c434dee6 AJ |
2197 | { |
2198 | /* If this reloc is in a read-only section, we might | |
2199 | need a copy reloc. We can't check reliably at this | |
2200 | stage whether the section is read-only, as input | |
2201 | sections have not yet been mapped to output sections. | |
2202 | Tentatively set the flag for now, and correct in | |
2203 | adjust_dynamic_symbol. */ | |
f5385ebf | 2204 | h->non_got_ref = 1; |
c434dee6 | 2205 | |
233cc9c1 L |
2206 | /* We may need a .plt entry if the symbol is a function |
2207 | defined in a shared lib or is a STT_GNU_IFUNC function | |
2208 | referenced from the code or read-only section. */ | |
34bb2571 L |
2209 | if (!h->def_regular |
2210 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
233cc9c1 L |
2211 | h->plt.refcount += 1; |
2212 | ||
5db4f0d3 L |
2213 | if (r_type == R_X86_64_PC32) |
2214 | { | |
2215 | /* Since something like ".long foo - ." may be used | |
2216 | as pointer, make sure that PLT is used if foo is | |
2217 | a function defined in a shared library. */ | |
2218 | if ((sec->flags & SEC_CODE) == 0) | |
2219 | h->pointer_equality_needed = 1; | |
2220 | } | |
2221 | else if (r_type != R_X86_64_PC32_BND | |
2222 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
2223 | { |
2224 | h->pointer_equality_needed = 1; | |
2225 | /* At run-time, R_X86_64_64 can be resolved for both | |
2226 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
2227 | can only be resolved for x32. */ | |
2228 | if ((sec->flags & SEC_READONLY) == 0 | |
2229 | && (r_type == R_X86_64_64 | |
2230 | || (!ABI_64_P (abfd) | |
2231 | && (r_type == R_X86_64_32 | |
2232 | || r_type == R_X86_64_32S)))) | |
aec6b87e | 2233 | eh->func_pointer_refcount += 1; |
04ebc307 | 2234 | } |
c434dee6 | 2235 | } |
70256ad8 | 2236 | |
06a6a421 | 2237 | size_reloc = FALSE; |
6a3e1bae | 2238 | do_size: |
70256ad8 AJ |
2239 | /* If we are creating a shared library, and this is a reloc |
2240 | against a global symbol, or a non PC relative reloc | |
2241 | against a local symbol, then we need to copy the reloc | |
2242 | into the shared library. However, if we are linking with | |
2243 | -Bsymbolic, we do not need to copy a reloc against a | |
2244 | global symbol which is defined in an object we are | |
407443a3 | 2245 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
2246 | this point we have not seen all the input files, so it is |
2247 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
2248 | later (it is never cleared). In case of a weak definition, |
2249 | DEF_REGULAR may be cleared later by a strong definition in | |
2250 | a shared library. We account for that possibility below by | |
2251 | storing information in the relocs_copied field of the hash | |
2252 | table entry. A similar situation occurs when creating | |
2253 | shared libraries and symbol visibility changes render the | |
31c0ebfe | 2254 | symbol local. |
c434dee6 AJ |
2255 | |
2256 | If on the other hand, we are creating an executable, we | |
2257 | may need to keep relocations for symbols satisfied by a | |
2258 | dynamic library if we manage to avoid copy relocs for the | |
233cc9c1 L |
2259 | symbol. |
2260 | ||
2261 | Generate dynamic pointer relocation against STT_GNU_IFUNC | |
2262 | symbol in the non-code section. */ | |
081b1afe L |
2263 | if ((bfd_link_pic (info) |
2264 | && (! IS_X86_64_PCREL_TYPE (r_type) | |
2265 | || (h != NULL | |
2266 | && (! (bfd_link_pie (info) | |
2267 | || SYMBOLIC_BIND (info, h)) | |
2268 | || h->root.type == bfd_link_hash_defweak | |
2269 | || !h->def_regular)))) | |
233cc9c1 L |
2270 | || (h != NULL |
2271 | && h->type == STT_GNU_IFUNC | |
2272 | && r_type == htab->pointer_r_type | |
2273 | && (sec->flags & SEC_CODE) == 0) | |
081b1afe L |
2274 | || (ELIMINATE_COPY_RELOCS |
2275 | && !bfd_link_pic (info) | |
2276 | && h != NULL | |
2277 | && (h->root.type == bfd_link_hash_defweak | |
2278 | || !h->def_regular))) | |
70256ad8 | 2279 | { |
e03a8ed8 L |
2280 | struct elf_dyn_relocs *p; |
2281 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2282 | |
2283 | /* We must copy these reloc types into the output file. | |
2284 | Create a reloc section in dynobj and make room for | |
2285 | this reloc. */ | |
70256ad8 AJ |
2286 | if (sreloc == NULL) |
2287 | { | |
83bac4b0 | 2288 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
2289 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
2290 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 2291 | |
70256ad8 | 2292 | if (sreloc == NULL) |
afd9acee | 2293 | goto error_return; |
70256ad8 AJ |
2294 | } |
2295 | ||
c434dee6 AJ |
2296 | /* If this is a global symbol, we count the number of |
2297 | relocations we need for this symbol. */ | |
2298 | if (h != NULL) | |
aec6b87e | 2299 | head = &eh->dyn_relocs; |
c434dee6 AJ |
2300 | else |
2301 | { | |
2302 | /* Track dynamic relocs needed for local syms too. | |
2303 | We really need local syms available to do this | |
2304 | easily. Oh well. */ | |
c434dee6 | 2305 | asection *s; |
87d72d41 | 2306 | void **vpp; |
87d72d41 AM |
2307 | |
2308 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2309 | abfd, r_symndx); | |
2310 | if (isym == NULL) | |
afd9acee | 2311 | goto error_return; |
87d72d41 AM |
2312 | |
2313 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2314 | if (s == NULL) |
87d72d41 | 2315 | s = sec; |
70256ad8 | 2316 | |
e81d3500 DD |
2317 | /* Beware of type punned pointers vs strict aliasing |
2318 | rules. */ | |
2319 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2320 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2321 | } |
70256ad8 | 2322 | |
c434dee6 AJ |
2323 | p = *head; |
2324 | if (p == NULL || p->sec != sec) | |
2325 | { | |
2326 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 2327 | |
e03a8ed8 | 2328 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2329 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2330 | if (p == NULL) |
afd9acee | 2331 | goto error_return; |
c434dee6 AJ |
2332 | p->next = *head; |
2333 | *head = p; | |
2334 | p->sec = sec; | |
2335 | p->count = 0; | |
2336 | p->pc_count = 0; | |
70256ad8 | 2337 | } |
c434dee6 AJ |
2338 | |
2339 | p->count += 1; | |
06a6a421 L |
2340 | /* Count size relocation as PC-relative relocation. */ |
2341 | if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc) | |
c434dee6 | 2342 | p->pc_count += 1; |
70256ad8 AJ |
2343 | } |
2344 | break; | |
fe4770f4 AJ |
2345 | |
2346 | /* This relocation describes the C++ object vtable hierarchy. | |
2347 | Reconstruct it for later use during GC. */ | |
2348 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2349 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
afd9acee | 2350 | goto error_return; |
fe4770f4 AJ |
2351 | break; |
2352 | ||
2353 | /* This relocation describes which C++ vtable entries are actually | |
2354 | used. Record for later use during GC. */ | |
2355 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
2356 | BFD_ASSERT (h != NULL); |
2357 | if (h != NULL | |
2358 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
afd9acee | 2359 | goto error_return; |
fe4770f4 | 2360 | break; |
c434dee6 AJ |
2361 | |
2362 | default: | |
2363 | break; | |
70256ad8 | 2364 | } |
dd7e64d4 | 2365 | |
56ceb5b5 L |
2366 | if ((r_type == R_X86_64_GOTPCREL |
2367 | || r_type == R_X86_64_GOTPCRELX | |
2368 | || r_type == R_X86_64_REX_GOTPCRELX) | |
c1d11331 | 2369 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
56ceb5b5 | 2370 | sec->need_convert_load = 1; |
70256ad8 AJ |
2371 | } |
2372 | ||
bedfd056 L |
2373 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2374 | { | |
2375 | if (!info->keep_memory) | |
2376 | free (contents); | |
2377 | else | |
2378 | { | |
2379 | /* Cache the section contents for elf_link_input_bfd. */ | |
2380 | elf_section_data (sec)->this_hdr.contents = contents; | |
2381 | } | |
2382 | } | |
2383 | ||
b34976b6 | 2384 | return TRUE; |
afd9acee L |
2385 | |
2386 | error_return: | |
bedfd056 L |
2387 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2388 | free (contents); | |
afd9acee L |
2389 | sec->check_relocs_failed = 1; |
2390 | return FALSE; | |
70256ad8 AJ |
2391 | } |
2392 | ||
c175a657 | 2393 | /* Convert load via the GOT slot to load immediate. */ |
daa67607 | 2394 | |
5e2ac45d L |
2395 | bfd_boolean |
2396 | _bfd_x86_64_elf_convert_load (bfd *abfd, asection *sec, | |
2397 | struct bfd_link_info *link_info) | |
daa67607 L |
2398 | { |
2399 | Elf_Internal_Shdr *symtab_hdr; | |
2400 | Elf_Internal_Rela *internal_relocs; | |
2401 | Elf_Internal_Rela *irel, *irelend; | |
2402 | bfd_byte *contents; | |
0afcef53 | 2403 | struct elf_x86_link_hash_table *htab; |
c175a657 | 2404 | bfd_boolean changed; |
daa67607 L |
2405 | bfd_signed_vma *local_got_refcounts; |
2406 | ||
2407 | /* Don't even try to convert non-ELF outputs. */ | |
2408 | if (!is_elf_hash_table (link_info->hash)) | |
2409 | return FALSE; | |
2410 | ||
c1d11331 | 2411 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 2412 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
56ceb5b5 | 2413 | || sec->need_convert_load == 0 |
c8831961 | 2414 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
2415 | return TRUE; |
2416 | ||
2417 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2418 | ||
2419 | /* Load the relocations for this section. */ | |
2420 | internal_relocs = (_bfd_elf_link_read_relocs | |
2421 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
2422 | link_info->keep_memory)); | |
2423 | if (internal_relocs == NULL) | |
2424 | return FALSE; | |
2425 | ||
c175a657 | 2426 | changed = FALSE; |
0afcef53 | 2427 | htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA); |
daa67607 L |
2428 | local_got_refcounts = elf_local_got_refcounts (abfd); |
2429 | ||
2430 | /* Get the section contents. */ | |
2431 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2432 | contents = elf_section_data (sec)->this_hdr.contents; | |
2433 | else | |
2434 | { | |
2435 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2436 | goto error_return; | |
2437 | } | |
2438 | ||
2439 | irelend = internal_relocs + sec->reloc_count; | |
2440 | for (irel = internal_relocs; irel < irelend; irel++) | |
2441 | { | |
2442 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
c175a657 | 2443 | unsigned int r_symndx; |
daa67607 | 2444 | struct elf_link_hash_entry *h; |
c175a657 | 2445 | bfd_boolean converted; |
59cab532 | 2446 | |
c175a657 L |
2447 | if (r_type != R_X86_64_GOTPCRELX |
2448 | && r_type != R_X86_64_REX_GOTPCRELX | |
2449 | && r_type != R_X86_64_GOTPCREL) | |
dfc87947 L |
2450 | continue; |
2451 | ||
c175a657 | 2452 | r_symndx = htab->r_sym (irel->r_info); |
daa67607 | 2453 | if (r_symndx < symtab_hdr->sh_info) |
0afcef53 L |
2454 | h = _bfd_elf_x86_get_local_sym_hash (htab, sec->owner, |
2455 | (const Elf_Internal_Rela *) irel, | |
2456 | FALSE); | |
59cab532 L |
2457 | else |
2458 | { | |
c175a657 | 2459 | h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info]; |
59cab532 L |
2460 | while (h->root.type == bfd_link_hash_indirect |
2461 | || h->root.type == bfd_link_hash_warning) | |
2462 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
59cab532 L |
2463 | } |
2464 | ||
c175a657 L |
2465 | /* STT_GNU_IFUNC must keep GOTPCREL relocations. */ |
2466 | if (h != NULL && h->type == STT_GNU_IFUNC) | |
2467 | continue; | |
daa67607 | 2468 | |
c175a657 L |
2469 | converted = FALSE; |
2470 | if (!elf_x86_64_convert_load_reloc (abfd, sec, contents, irel, h, | |
2471 | &converted, link_info)) | |
2472 | goto error_return; | |
56ceb5b5 | 2473 | |
c175a657 | 2474 | if (converted) |
56ceb5b5 | 2475 | { |
c175a657 L |
2476 | changed = converted; |
2477 | if (h) | |
56ceb5b5 | 2478 | { |
c175a657 L |
2479 | if (h->got.refcount > 0) |
2480 | h->got.refcount -= 1; | |
56ceb5b5 L |
2481 | } |
2482 | else | |
2483 | { | |
c175a657 L |
2484 | if (local_got_refcounts != NULL |
2485 | && local_got_refcounts[r_symndx] > 0) | |
2486 | local_got_refcounts[r_symndx] -= 1; | |
56ceb5b5 | 2487 | } |
daa67607 L |
2488 | } |
2489 | } | |
2490 | ||
2491 | if (contents != NULL | |
2492 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2493 | { | |
c175a657 | 2494 | if (!changed && !link_info->keep_memory) |
daa67607 L |
2495 | free (contents); |
2496 | else | |
2497 | { | |
2498 | /* Cache the section contents for elf_link_input_bfd. */ | |
2499 | elf_section_data (sec)->this_hdr.contents = contents; | |
2500 | } | |
2501 | } | |
2502 | ||
2503 | if (elf_section_data (sec)->relocs != internal_relocs) | |
2504 | { | |
c175a657 | 2505 | if (!changed) |
daa67607 L |
2506 | free (internal_relocs); |
2507 | else | |
2508 | elf_section_data (sec)->relocs = internal_relocs; | |
2509 | } | |
2510 | ||
2511 | return TRUE; | |
2512 | ||
2513 | error_return: | |
2514 | if (contents != NULL | |
2515 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2516 | free (contents); | |
2517 | if (internal_relocs != NULL | |
2518 | && elf_section_data (sec)->relocs != internal_relocs) | |
2519 | free (internal_relocs); | |
2520 | return FALSE; | |
2521 | } | |
2522 | ||
bffbf940 JJ |
2523 | /* Return the relocation value for @tpoff relocation |
2524 | if STT_TLS virtual address is ADDRESS. */ | |
2525 | ||
2526 | static bfd_vma | |
351f65ca | 2527 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 2528 | { |
e1918d23 | 2529 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
2530 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
2531 | bfd_vma static_tls_size; | |
bffbf940 JJ |
2532 | |
2533 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 2534 | if (htab->tls_sec == NULL) |
bffbf940 | 2535 | return 0; |
7dc98aea RO |
2536 | |
2537 | /* Consider special static TLS alignment requirements. */ | |
2538 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
2539 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
2540 | } |
2541 | ||
90f487df L |
2542 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
2543 | branch? */ | |
2544 | ||
2545 | static bfd_boolean | |
2546 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
2547 | { | |
2548 | /* Opcode Instruction | |
2549 | 0xe8 call | |
2550 | 0xe9 jump | |
2551 | 0x0f 0x8x conditional jump */ | |
2552 | return ((offset > 0 | |
2553 | && (contents [offset - 1] == 0xe8 | |
2554 | || contents [offset - 1] == 0xe9)) | |
2555 | || (offset > 1 | |
2556 | && contents [offset - 2] == 0x0f | |
2557 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
2558 | } | |
2559 | ||
8d88c4ca NC |
2560 | /* Relocate an x86_64 ELF section. */ |
2561 | ||
b34976b6 | 2562 | static bfd_boolean |
351f65ca L |
2563 | elf_x86_64_relocate_section (bfd *output_bfd, |
2564 | struct bfd_link_info *info, | |
2565 | bfd *input_bfd, | |
2566 | asection *input_section, | |
2567 | bfd_byte *contents, | |
2568 | Elf_Internal_Rela *relocs, | |
2569 | Elf_Internal_Sym *local_syms, | |
2570 | asection **local_sections) | |
8d88c4ca | 2571 | { |
0afcef53 | 2572 | struct elf_x86_link_hash_table *htab; |
8d88c4ca NC |
2573 | Elf_Internal_Shdr *symtab_hdr; |
2574 | struct elf_link_hash_entry **sym_hashes; | |
2575 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2576 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 2577 | Elf_Internal_Rela *rel; |
60f2e42e | 2578 | Elf_Internal_Rela *wrel; |
8d88c4ca | 2579 | Elf_Internal_Rela *relend; |
38b12349 | 2580 | unsigned int plt_entry_size; |
8d88c4ca | 2581 | |
338c190a L |
2582 | /* Skip if check_relocs failed. */ |
2583 | if (input_section->check_relocs_failed) | |
2584 | return FALSE; | |
2585 | ||
0afcef53 | 2586 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
2587 | if (htab == NULL) |
2588 | return FALSE; | |
fe53b4a4 L |
2589 | |
2590 | BFD_ASSERT (is_x86_elf (input_bfd, htab)); | |
2591 | ||
765e526c | 2592 | plt_entry_size = htab->plt.plt_entry_size; |
0ffa91dd | 2593 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
2594 | sym_hashes = elf_sym_hashes (input_bfd); |
2595 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
0afcef53 | 2596 | local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 2597 | |
0afcef53 | 2598 | _bfd_x86_elf_set_tls_module_base (info); |
9f03412a | 2599 | |
60f2e42e | 2600 | rel = wrel = relocs; |
8d88c4ca | 2601 | relend = relocs + input_section->reloc_count; |
60f2e42e | 2602 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 2603 | { |
bffbf940 | 2604 | unsigned int r_type; |
8d88c4ca NC |
2605 | reloc_howto_type *howto; |
2606 | unsigned long r_symndx; | |
2607 | struct elf_link_hash_entry *h; | |
0afcef53 | 2608 | struct elf_x86_link_hash_entry *eh; |
8d88c4ca NC |
2609 | Elf_Internal_Sym *sym; |
2610 | asection *sec; | |
0ff2b86e | 2611 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 2612 | bfd_vma relocation; |
b34976b6 | 2613 | bfd_boolean unresolved_reloc; |
8d88c4ca | 2614 | bfd_reloc_status_type r; |
bffbf940 | 2615 | int tls_type; |
0ff2b86e | 2616 | asection *base_got, *resolved_plt; |
1788fc08 | 2617 | bfd_vma st_size; |
aec6b87e | 2618 | bfd_boolean resolved_to_zero; |
9e9821dd | 2619 | bfd_boolean relative_reloc; |
8d88c4ca | 2620 | |
351f65ca | 2621 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
2622 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
2623 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
2624 | { |
2625 | if (wrel != rel) | |
2626 | *wrel = *rel; | |
2627 | continue; | |
2628 | } | |
8d88c4ca | 2629 | |
9911c0fc | 2630 | if (r_type >= (int) R_X86_64_standard) |
47aeb64c | 2631 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
8d88c4ca | 2632 | |
d7921315 | 2633 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 2634 | || ABI_64_P (output_bfd)) |
d7921315 L |
2635 | howto = x86_64_elf_howto_table + r_type; |
2636 | else | |
2637 | howto = (x86_64_elf_howto_table | |
2638 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 2639 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
2640 | h = NULL; |
2641 | sym = NULL; | |
2642 | sec = NULL; | |
b34976b6 | 2643 | unresolved_reloc = FALSE; |
8d88c4ca | 2644 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
2645 | { |
2646 | sym = local_syms + r_symndx; | |
2647 | sec = local_sections[r_symndx]; | |
c434dee6 | 2648 | |
c25bc9fc L |
2649 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
2650 | &sec, rel); | |
1788fc08 | 2651 | st_size = sym->st_size; |
c25bc9fc L |
2652 | |
2653 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 2654 | if (!bfd_link_relocatable (info) |
351f65ca | 2655 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 2656 | { |
0afcef53 L |
2657 | h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, |
2658 | rel, FALSE); | |
c25bc9fc L |
2659 | if (h == NULL) |
2660 | abort (); | |
2661 | ||
eed180f8 | 2662 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
2663 | h->root.u.def.value = sym->st_value; |
2664 | h->root.u.def.section = sec; | |
2665 | } | |
8da6118f | 2666 | } |
8d88c4ca | 2667 | else |
8da6118f | 2668 | { |
c9736ba0 | 2669 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 2670 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
c434dee6 | 2671 | |
b2a8e766 AM |
2672 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2673 | r_symndx, symtab_hdr, sym_hashes, | |
2674 | h, sec, relocation, | |
62d887d4 | 2675 | unresolved_reloc, warned, ignored); |
1788fc08 | 2676 | st_size = h->size; |
8da6118f | 2677 | } |
ab96bf03 | 2678 | |
dbaa2011 | 2679 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
2680 | { |
2681 | _bfd_clear_contents (howto, input_bfd, input_section, | |
2682 | contents + rel->r_offset); | |
2683 | wrel->r_offset = rel->r_offset; | |
2684 | wrel->r_info = 0; | |
2685 | wrel->r_addend = 0; | |
2686 | ||
2687 | /* For ld -r, remove relocations in debug sections against | |
2688 | sections defined in discarded sections. Not done for | |
2689 | eh_frame editing code expects to be present. */ | |
2690 | if (bfd_link_relocatable (info) | |
2691 | && (input_section->flags & SEC_DEBUGGING)) | |
2692 | wrel--; | |
2693 | ||
2694 | continue; | |
2695 | } | |
ab96bf03 | 2696 | |
0e1862bb | 2697 | if (bfd_link_relocatable (info)) |
2d5da473 L |
2698 | { |
2699 | if (wrel != rel) | |
2700 | *wrel = *rel; | |
2701 | continue; | |
2702 | } | |
ab96bf03 | 2703 | |
1788fc08 | 2704 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 2705 | { |
1788fc08 L |
2706 | if (r_type == R_X86_64_64) |
2707 | { | |
2708 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
2709 | zero-extend it to 64bit if addend is zero. */ | |
2710 | r_type = R_X86_64_32; | |
2711 | memset (contents + rel->r_offset + 4, 0, 4); | |
2712 | } | |
2713 | else if (r_type == R_X86_64_SIZE64) | |
2714 | { | |
2715 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
2716 | zero-extend it to 64bit if addend is zero. */ | |
2717 | r_type = R_X86_64_SIZE32; | |
2718 | memset (contents + rel->r_offset + 4, 0, 4); | |
2719 | } | |
64d25c44 L |
2720 | } |
2721 | ||
0afcef53 | 2722 | eh = (struct elf_x86_link_hash_entry *) h; |
0ff2b86e | 2723 | |
cbe950e9 L |
2724 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
2725 | it here if it is defined in a non-shared object. */ | |
2726 | if (h != NULL | |
2727 | && h->type == STT_GNU_IFUNC | |
2728 | && h->def_regular) | |
2729 | { | |
cbe950e9 | 2730 | bfd_vma plt_index; |
4c544807 | 2731 | const char *name; |
cbe950e9 | 2732 | |
97dc35c8 L |
2733 | if ((input_section->flags & SEC_ALLOC) == 0) |
2734 | { | |
2735 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
2736 | sections because such sections are not SEC_ALLOC and | |
2737 | thus ld.so will not process them. */ | |
2738 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 2739 | continue; |
97dc35c8 L |
2740 | abort (); |
2741 | } | |
233cc9c1 L |
2742 | |
2743 | switch (r_type) | |
2744 | { | |
2745 | default: | |
2746 | break; | |
2747 | ||
2748 | case R_X86_64_GOTPCREL: | |
2749 | case R_X86_64_GOTPCRELX: | |
2750 | case R_X86_64_REX_GOTPCRELX: | |
2751 | case R_X86_64_GOTPCREL64: | |
2752 | base_got = htab->elf.sgot; | |
2753 | off = h->got.offset; | |
2754 | ||
2755 | if (base_got == NULL) | |
2756 | abort (); | |
2757 | ||
2758 | if (off == (bfd_vma) -1) | |
2759 | { | |
2760 | /* We can't use h->got.offset here to save state, or | |
2761 | even just remember the offset, as finish_dynamic_symbol | |
2762 | would use that as offset into .got. */ | |
2763 | ||
2764 | if (h->plt.offset == (bfd_vma) -1) | |
2765 | abort (); | |
2766 | ||
2767 | if (htab->elf.splt != NULL) | |
2768 | { | |
38b12349 | 2769 | plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2770 | - htab->plt.has_plt0); |
233cc9c1 L |
2771 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
2772 | base_got = htab->elf.sgotplt; | |
2773 | } | |
2774 | else | |
2775 | { | |
2776 | plt_index = h->plt.offset / plt_entry_size; | |
2777 | off = plt_index * GOT_ENTRY_SIZE; | |
2778 | base_got = htab->elf.igotplt; | |
2779 | } | |
2780 | ||
2781 | if (h->dynindx == -1 | |
2782 | || h->forced_local | |
2783 | || info->symbolic) | |
2784 | { | |
2785 | /* This references the local defitionion. We must | |
2786 | initialize this entry in the global offset table. | |
2787 | Since the offset must always be a multiple of 8, | |
2788 | we use the least significant bit to record | |
2789 | whether we have initialized it already. | |
2790 | ||
2791 | When doing a dynamic link, we create a .rela.got | |
2792 | relocation entry to initialize the value. This | |
2793 | is done in the finish_dynamic_symbol routine. */ | |
2794 | if ((off & 1) != 0) | |
2795 | off &= ~1; | |
2796 | else | |
2797 | { | |
2798 | bfd_put_64 (output_bfd, relocation, | |
2799 | base_got->contents + off); | |
2800 | /* Note that this is harmless for the GOTPLT64 | |
2801 | case, as -1 | 1 still is -1. */ | |
2802 | h->got.offset |= 1; | |
2803 | } | |
2804 | } | |
2805 | } | |
2806 | ||
2807 | relocation = (base_got->output_section->vma | |
2808 | + base_got->output_offset + off); | |
2809 | ||
2810 | goto do_relocation; | |
2811 | } | |
2812 | ||
2813 | if (h->plt.offset == (bfd_vma) -1) | |
2814 | { | |
2815 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
2816 | if (r_type == htab->pointer_r_type | |
2817 | && (input_section->flags & SEC_CODE) == 0) | |
2818 | goto do_ifunc_pointer; | |
2819 | goto bad_ifunc_reloc; | |
2820 | } | |
cbe950e9 L |
2821 | |
2822 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
2823 | if (htab->elf.splt != NULL) |
2824 | { | |
f2c29a16 | 2825 | if (htab->plt_second != NULL) |
0ff2b86e | 2826 | { |
f2c29a16 L |
2827 | resolved_plt = htab->plt_second; |
2828 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
2829 | } |
2830 | else | |
2831 | { | |
2832 | resolved_plt = htab->elf.splt; | |
2833 | plt_offset = h->plt.offset; | |
2834 | } | |
2835 | } | |
2836 | else | |
2837 | { | |
2838 | resolved_plt = htab->elf.iplt; | |
2839 | plt_offset = h->plt.offset; | |
2840 | } | |
2841 | ||
2842 | relocation = (resolved_plt->output_section->vma | |
2843 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
2844 | |
2845 | switch (r_type) | |
2846 | { | |
2847 | default: | |
233cc9c1 | 2848 | bad_ifunc_reloc: |
4c544807 L |
2849 | if (h->root.root.string) |
2850 | name = h->root.root.string; | |
2851 | else | |
2852 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
2853 | NULL); | |
4eca0228 | 2854 | _bfd_error_handler |
695344c0 | 2855 | /* xgettext:c-format */ |
cbe950e9 | 2856 | (_("%B: relocation %s against STT_GNU_IFUNC " |
233cc9c1 L |
2857 | "symbol `%s' isn't supported"), input_bfd, |
2858 | howto->name, name); | |
cbe950e9 L |
2859 | bfd_set_error (bfd_error_bad_value); |
2860 | return FALSE; | |
2861 | ||
2862 | case R_X86_64_32S: | |
0e1862bb | 2863 | if (bfd_link_pic (info)) |
cbe950e9 | 2864 | abort (); |
710ab287 L |
2865 | goto do_relocation; |
2866 | ||
248775ba L |
2867 | case R_X86_64_32: |
2868 | if (ABI_64_P (output_bfd)) | |
2869 | goto do_relocation; | |
17672001 | 2870 | /* FALLTHROUGH */ |
eed180f8 | 2871 | case R_X86_64_64: |
233cc9c1 | 2872 | do_ifunc_pointer: |
710ab287 L |
2873 | if (rel->r_addend != 0) |
2874 | { | |
4c544807 L |
2875 | if (h->root.root.string) |
2876 | name = h->root.root.string; | |
2877 | else | |
2878 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
2879 | sym, NULL); | |
4eca0228 | 2880 | _bfd_error_handler |
695344c0 | 2881 | /* xgettext:c-format */ |
710ab287 | 2882 | (_("%B: relocation %s against STT_GNU_IFUNC " |
d42c267e | 2883 | "symbol `%s' has non-zero addend: %Ld"), |
ef77d6af | 2884 | input_bfd, howto->name, name, rel->r_addend); |
710ab287 L |
2885 | bfd_set_error (bfd_error_bad_value); |
2886 | return FALSE; | |
2887 | } | |
2888 | ||
2889 | /* Generate dynamic relcoation only when there is a | |
233cc9c1 L |
2890 | non-GOT reference in a shared object or there is no |
2891 | PLT. */ | |
2892 | if ((bfd_link_pic (info) && h->non_got_ref) | |
2893 | || h->plt.offset == (bfd_vma) -1) | |
710ab287 L |
2894 | { |
2895 | Elf_Internal_Rela outrel; | |
710ab287 L |
2896 | asection *sreloc; |
2897 | ||
c25bc9fc L |
2898 | /* Need a dynamic relocation to get the real function |
2899 | address. */ | |
710ab287 L |
2900 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
2901 | info, | |
2902 | input_section, | |
2903 | rel->r_offset); | |
2904 | if (outrel.r_offset == (bfd_vma) -1 | |
2905 | || outrel.r_offset == (bfd_vma) -2) | |
2906 | abort (); | |
2907 | ||
2908 | outrel.r_offset += (input_section->output_section->vma | |
2909 | + input_section->output_offset); | |
2910 | ||
2911 | if (h->dynindx == -1 | |
44c4ea11 | 2912 | || h->forced_local |
0e1862bb | 2913 | || bfd_link_executable (info)) |
710ab287 | 2914 | { |
6322e5c5 L |
2915 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
2916 | h->root.root.string, | |
2917 | h->root.u.def.section->owner); | |
2918 | ||
710ab287 | 2919 | /* This symbol is resolved locally. */ |
56b8aada L |
2920 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
2921 | outrel.r_addend = (h->root.u.def.value | |
2922 | + h->root.u.def.section->output_section->vma | |
2923 | + h->root.u.def.section->output_offset); | |
710ab287 L |
2924 | } |
2925 | else | |
2926 | { | |
351f65ca | 2927 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
2928 | outrel.r_addend = 0; |
2929 | } | |
2930 | ||
233cc9c1 L |
2931 | /* Dynamic relocations are stored in |
2932 | 1. .rela.ifunc section in PIC object. | |
2933 | 2. .rela.got section in dynamic executable. | |
2934 | 3. .rela.iplt section in static executable. */ | |
2935 | if (bfd_link_pic (info)) | |
2936 | sreloc = htab->elf.irelifunc; | |
2937 | else if (htab->elf.splt != NULL) | |
2938 | sreloc = htab->elf.srelgot; | |
2939 | else | |
2940 | sreloc = htab->elf.irelplt; | |
351f65ca | 2941 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
2942 | |
2943 | /* If this reloc is against an external symbol, we | |
2944 | do not want to fiddle with the addend. Otherwise, | |
2945 | we need to include the symbol value so that it | |
2946 | becomes an addend for the dynamic reloc. For an | |
2947 | internal symbol, we have updated addend. */ | |
56b8aada | 2948 | continue; |
710ab287 | 2949 | } |
17672001 | 2950 | /* FALLTHROUGH */ |
cbe950e9 | 2951 | case R_X86_64_PC32: |
c3320543 | 2952 | case R_X86_64_PC32_BND: |
cbe950e9 L |
2953 | case R_X86_64_PC64: |
2954 | case R_X86_64_PLT32: | |
c3320543 | 2955 | case R_X86_64_PLT32_BND: |
cbe950e9 | 2956 | goto do_relocation; |
cbe950e9 L |
2957 | } |
2958 | } | |
2959 | ||
aec6b87e | 2960 | resolved_to_zero = (eh != NULL |
e62b9723 | 2961 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
0afcef53 | 2962 | X86_64_ELF_DATA, |
e62b9723 L |
2963 | eh->has_got_reloc, |
2964 | eh)); | |
aec6b87e | 2965 | |
70256ad8 AJ |
2966 | /* When generating a shared object, the relocations handled here are |
2967 | copied into the output file to be resolved at run time. */ | |
2968 | switch (r_type) | |
2969 | { | |
2970 | case R_X86_64_GOT32: | |
7b81dfbb | 2971 | case R_X86_64_GOT64: |
70256ad8 AJ |
2972 | /* Relocation is to the entry for this symbol in the global |
2973 | offset table. */ | |
70256ad8 | 2974 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
2975 | case R_X86_64_GOTPCRELX: |
2976 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
2977 | case R_X86_64_GOTPCREL64: |
2978 | /* Use global offset table entry as symbol value. */ | |
2979 | case R_X86_64_GOTPLT64: | |
de194d85 | 2980 | /* This is obsolete and treated the same as GOT64. */ |
6de2ae4a | 2981 | base_got = htab->elf.sgot; |
7b81dfbb | 2982 | |
6de2ae4a | 2983 | if (htab->elf.sgot == NULL) |
c434dee6 | 2984 | abort (); |
053579d7 | 2985 | |
9e9821dd | 2986 | relative_reloc = FALSE; |
51e0a107 | 2987 | if (h != NULL) |
70256ad8 | 2988 | { |
b34976b6 | 2989 | bfd_boolean dyn; |
c434dee6 AJ |
2990 | |
2991 | off = h->got.offset; | |
7b81dfbb | 2992 | if (h->needs_plt |
eed180f8 | 2993 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
2994 | && off == (bfd_vma)-1) |
2995 | { | |
2996 | /* We can't use h->got.offset here to save | |
2997 | state, or even just remember the offset, as | |
2998 | finish_dynamic_symbol would use that as offset into | |
2999 | .got. */ | |
38b12349 | 3000 | bfd_vma plt_index = (h->plt.offset / plt_entry_size |
765e526c | 3001 | - htab->plt.has_plt0); |
7b81dfbb | 3002 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 3003 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
3004 | } |
3005 | ||
c434dee6 | 3006 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 3007 | |
0e1862bb L |
3008 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
3009 | || (bfd_link_pic (info) | |
27482721 | 3010 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
3011 | || (ELF_ST_VISIBILITY (h->other) |
3012 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
3013 | { |
3014 | /* This is actually a static link, or it is a -Bsymbolic | |
3015 | link and the symbol is defined locally, or the symbol | |
407443a3 | 3016 | was forced to be local because of a version file. We |
51e0a107 JH |
3017 | must initialize this entry in the global offset table. |
3018 | Since the offset must always be a multiple of 8, we | |
3019 | use the least significant bit to record whether we | |
3020 | have initialized it already. | |
3021 | ||
3022 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
3023 | relocation entry to initialize the value. This is |
3024 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
3025 | if ((off & 1) != 0) |
3026 | off &= ~1; | |
3027 | else | |
3028 | { | |
3029 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
3030 | base_got->contents + off); |
3031 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 3032 | as -1 | 1 still is -1. */ |
51e0a107 | 3033 | h->got.offset |= 1; |
9e9821dd L |
3034 | |
3035 | if (h->dynindx == -1 | |
3036 | && !h->forced_local | |
3037 | && h->root.type != bfd_link_hash_undefweak | |
3038 | && bfd_link_pic (info)) | |
3039 | { | |
3040 | /* If this symbol isn't dynamic in PIC, | |
3041 | generate R_X86_64_RELATIVE here. */ | |
3042 | eh->no_finish_dynamic_symbol = 1; | |
3043 | relative_reloc = TRUE; | |
3044 | } | |
51e0a107 JH |
3045 | } |
3046 | } | |
053579d7 | 3047 | else |
b34976b6 | 3048 | unresolved_reloc = FALSE; |
70256ad8 | 3049 | } |
51e0a107 JH |
3050 | else |
3051 | { | |
c434dee6 AJ |
3052 | if (local_got_offsets == NULL) |
3053 | abort (); | |
51e0a107 JH |
3054 | |
3055 | off = local_got_offsets[r_symndx]; | |
3056 | ||
3057 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
3058 | the least significant bit to record whether we have |
3059 | already generated the necessary reloc. */ | |
51e0a107 JH |
3060 | if ((off & 1) != 0) |
3061 | off &= ~1; | |
3062 | else | |
3063 | { | |
c434dee6 | 3064 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 3065 | base_got->contents + off); |
9e9821dd | 3066 | local_got_offsets[r_symndx] |= 1; |
51e0a107 | 3067 | |
0e1862bb | 3068 | if (bfd_link_pic (info)) |
9e9821dd | 3069 | relative_reloc = TRUE; |
51e0a107 | 3070 | } |
51e0a107 | 3071 | } |
6a2bda3f | 3072 | |
9e9821dd L |
3073 | if (relative_reloc) |
3074 | { | |
3075 | asection *s; | |
3076 | Elf_Internal_Rela outrel; | |
3077 | ||
3078 | /* We need to generate a R_X86_64_RELATIVE reloc | |
3079 | for the dynamic linker. */ | |
3080 | s = htab->elf.srelgot; | |
3081 | if (s == NULL) | |
3082 | abort (); | |
3083 | ||
3084 | outrel.r_offset = (base_got->output_section->vma | |
3085 | + base_got->output_offset | |
3086 | + off); | |
3087 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); | |
3088 | outrel.r_addend = relocation; | |
3089 | elf_append_rela (output_bfd, s, &outrel); | |
3090 | } | |
3091 | ||
c434dee6 AJ |
3092 | if (off >= (bfd_vma) -2) |
3093 | abort (); | |
3094 | ||
7b81dfbb AJ |
3095 | relocation = base_got->output_section->vma |
3096 | + base_got->output_offset + off; | |
56ceb5b5 L |
3097 | if (r_type != R_X86_64_GOTPCREL |
3098 | && r_type != R_X86_64_GOTPCRELX | |
3099 | && r_type != R_X86_64_REX_GOTPCRELX | |
3100 | && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
3101 | relocation -= htab->elf.sgotplt->output_section->vma |
3102 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 3103 | |
70256ad8 AJ |
3104 | break; |
3105 | ||
d6ab8113 JB |
3106 | case R_X86_64_GOTOFF64: |
3107 | /* Relocation is relative to the start of the global offset | |
3108 | table. */ | |
3109 | ||
3d949995 L |
3110 | /* Check to make sure it isn't a protected function or data |
3111 | symbol for shared library since it may not be local when | |
e3c0e327 L |
3112 | used as function address or with copy relocation. We also |
3113 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 3114 | if (bfd_link_pic (info) && h) |
d6ab8113 | 3115 | { |
e3c0e327 L |
3116 | if (!h->def_regular) |
3117 | { | |
3118 | const char *v; | |
3119 | ||
3120 | switch (ELF_ST_VISIBILITY (h->other)) | |
3121 | { | |
3122 | case STV_HIDDEN: | |
3123 | v = _("hidden symbol"); | |
3124 | break; | |
3125 | case STV_INTERNAL: | |
3126 | v = _("internal symbol"); | |
3127 | break; | |
3128 | case STV_PROTECTED: | |
3129 | v = _("protected symbol"); | |
3130 | break; | |
3131 | default: | |
3132 | v = _("symbol"); | |
3133 | break; | |
3134 | } | |
3135 | ||
4eca0228 | 3136 | _bfd_error_handler |
695344c0 | 3137 | /* xgettext:c-format */ |
63a5468a AM |
3138 | (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s" |
3139 | " `%s' can not be used when making a shared object"), | |
e3c0e327 L |
3140 | input_bfd, v, h->root.root.string); |
3141 | bfd_set_error (bfd_error_bad_value); | |
3142 | return FALSE; | |
3143 | } | |
0e1862bb | 3144 | else if (!bfd_link_executable (info) |
e3c0e327 L |
3145 | && !SYMBOL_REFERENCES_LOCAL (info, h) |
3146 | && (h->type == STT_FUNC | |
3147 | || h->type == STT_OBJECT) | |
3148 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
3149 | { | |
4eca0228 | 3150 | _bfd_error_handler |
695344c0 | 3151 | /* xgettext:c-format */ |
63a5468a AM |
3152 | (_("%B: relocation R_X86_64_GOTOFF64 against protected %s" |
3153 | " `%s' can not be used when making a shared object"), | |
e3c0e327 L |
3154 | input_bfd, |
3155 | h->type == STT_FUNC ? "function" : "data", | |
3156 | h->root.root.string); | |
3157 | bfd_set_error (bfd_error_bad_value); | |
d6ab8113 | 3158 | return FALSE; |
e3c0e327 | 3159 | } |
d6ab8113 JB |
3160 | } |
3161 | ||
3162 | /* Note that sgot is not involved in this | |
3163 | calculation. We always want the start of .got.plt. If we | |
3164 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
3165 | permitted by the ABI, we might have to change this | |
3166 | calculation. */ | |
6de2ae4a L |
3167 | relocation -= htab->elf.sgotplt->output_section->vma |
3168 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3169 | break; |
3170 | ||
3171 | case R_X86_64_GOTPC32: | |
7b81dfbb | 3172 | case R_X86_64_GOTPC64: |
d6ab8113 | 3173 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
3174 | relocation = htab->elf.sgotplt->output_section->vma |
3175 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3176 | unresolved_reloc = FALSE; |
3177 | break; | |
7b81dfbb AJ |
3178 | |
3179 | case R_X86_64_PLTOFF64: | |
3180 | /* Relocation is PLT entry relative to GOT. For local | |
3181 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 3182 | if (h != NULL |
7b81dfbb | 3183 | /* See PLT32 handling. */ |
9d734efa L |
3184 | && (h->plt.offset != (bfd_vma) -1 |
3185 | || eh->plt_got.offset != (bfd_vma) -1) | |
6de2ae4a | 3186 | && htab->elf.splt != NULL) |
7b81dfbb | 3187 | { |
9d734efa L |
3188 | if (eh->plt_got.offset != (bfd_vma) -1) |
3189 | { | |
3190 | /* Use the GOT PLT. */ | |
3191 | resolved_plt = htab->plt_got; | |
3192 | plt_offset = eh->plt_got.offset; | |
3193 | } | |
f2c29a16 | 3194 | else if (htab->plt_second != NULL) |
0ff2b86e | 3195 | { |
f2c29a16 L |
3196 | resolved_plt = htab->plt_second; |
3197 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
3198 | } |
3199 | else | |
3200 | { | |
3201 | resolved_plt = htab->elf.splt; | |
3202 | plt_offset = h->plt.offset; | |
3203 | } | |
3204 | ||
3205 | relocation = (resolved_plt->output_section->vma | |
3206 | + resolved_plt->output_offset | |
3207 | + plt_offset); | |
7b81dfbb AJ |
3208 | unresolved_reloc = FALSE; |
3209 | } | |
3210 | ||
6de2ae4a L |
3211 | relocation -= htab->elf.sgotplt->output_section->vma |
3212 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 3213 | break; |
d6ab8113 | 3214 | |
70256ad8 | 3215 | case R_X86_64_PLT32: |
c3320543 | 3216 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
3217 | /* Relocation is to the entry for this symbol in the |
3218 | procedure linkage table. */ | |
3219 | ||
3220 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 3221 | without using the procedure linkage table. */ |
70256ad8 AJ |
3222 | if (h == NULL) |
3223 | break; | |
3224 | ||
dd7e64d4 L |
3225 | if ((h->plt.offset == (bfd_vma) -1 |
3226 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 3227 | || htab->elf.splt == NULL) |
70256ad8 AJ |
3228 | { |
3229 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
3230 | happens when statically linking PIC code, or when |
3231 | using -Bsymbolic. */ | |
70256ad8 AJ |
3232 | break; |
3233 | } | |
3234 | ||
dd7e64d4 | 3235 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 3236 | { |
f2c29a16 | 3237 | if (htab->plt_second != NULL) |
dd7e64d4 | 3238 | { |
f2c29a16 L |
3239 | resolved_plt = htab->plt_second; |
3240 | plt_offset = eh->plt_second.offset; | |
dd7e64d4 L |
3241 | } |
3242 | else | |
3243 | { | |
3244 | resolved_plt = htab->elf.splt; | |
3245 | plt_offset = h->plt.offset; | |
3246 | } | |
0ff2b86e L |
3247 | } |
3248 | else | |
3249 | { | |
dd7e64d4 L |
3250 | /* Use the GOT PLT. */ |
3251 | resolved_plt = htab->plt_got; | |
3252 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
3253 | } |
3254 | ||
3255 | relocation = (resolved_plt->output_section->vma | |
3256 | + resolved_plt->output_offset | |
3257 | + plt_offset); | |
b34976b6 | 3258 | unresolved_reloc = FALSE; |
70256ad8 AJ |
3259 | break; |
3260 | ||
1788fc08 L |
3261 | case R_X86_64_SIZE32: |
3262 | case R_X86_64_SIZE64: | |
1788fc08 L |
3263 | /* Set to symbol size. */ |
3264 | relocation = st_size; | |
3265 | goto direct; | |
3266 | ||
fd8ab9e5 AJ |
3267 | case R_X86_64_PC8: |
3268 | case R_X86_64_PC16: | |
3269 | case R_X86_64_PC32: | |
c3320543 | 3270 | case R_X86_64_PC32_BND: |
6333bc0d | 3271 | /* Don't complain about -fPIC if the symbol is undefined when |
7073b5b9 L |
3272 | building executable unless it is unresolved weak symbol or |
3273 | -z nocopyreloc is used. */ | |
aec6b87e | 3274 | if ((input_section->flags & SEC_ALLOC) != 0 |
90f487df | 3275 | && (input_section->flags & SEC_READONLY) != 0 |
6333bc0d | 3276 | && h != NULL |
aec6b87e | 3277 | && ((bfd_link_executable (info) |
7073b5b9 L |
3278 | && ((h->root.type == bfd_link_hash_undefweak |
3279 | && !resolved_to_zero) | |
a5b4ee94 L |
3280 | || ((info->nocopyreloc |
3281 | || (eh->def_protected | |
3282 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
3283 | && h->def_dynamic |
3284 | && !(h->root.u.def.section->flags & SEC_CODE)))) | |
c5bb8910 | 3285 | || bfd_link_dll (info))) |
6610a52d | 3286 | { |
41bed6dd L |
3287 | bfd_boolean fail = FALSE; |
3288 | bfd_boolean branch | |
c3320543 L |
3289 | = ((r_type == R_X86_64_PC32 |
3290 | || r_type == R_X86_64_PC32_BND) | |
41bed6dd L |
3291 | && is_32bit_relative_branch (contents, rel->r_offset)); |
3292 | ||
3293 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
3294 | { | |
3295 | /* Symbol is referenced locally. Make sure it is | |
3296 | defined locally or for a branch. */ | |
8170f769 L |
3297 | fail = (!(h->def_regular || ELF_COMMON_DEF_P (h)) |
3298 | && !branch); | |
41bed6dd | 3299 | } |
aec6b87e | 3300 | else if (!(bfd_link_pie (info) |
bc696fd5 | 3301 | && (h->needs_copy || eh->needs_copy))) |
41bed6dd | 3302 | { |
9a926d55 L |
3303 | /* Symbol doesn't need copy reloc and isn't referenced |
3304 | locally. We only allow branch to symbol with | |
3305 | non-default visibility. */ | |
41bed6dd L |
3306 | fail = (!branch |
3307 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
3308 | } | |
3309 | ||
3310 | if (fail) | |
aab921ad | 3311 | return elf_x86_64_need_pic (info, input_bfd, input_section, |
338c190a | 3312 | h, NULL, NULL, howto); |
6610a52d L |
3313 | } |
3314 | /* Fall through. */ | |
3315 | ||
70256ad8 AJ |
3316 | case R_X86_64_8: |
3317 | case R_X86_64_16: | |
3318 | case R_X86_64_32: | |
d6ab8113 | 3319 | case R_X86_64_PC64: |
6b3db546 | 3320 | case R_X86_64_64: |
80643fbc | 3321 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 3322 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 3323 | |
1788fc08 | 3324 | direct: |
b1e24c02 | 3325 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
3326 | break; |
3327 | ||
9a926d55 | 3328 | /* Don't copy a pc-relative relocation into the output file |
6333bc0d | 3329 | if the symbol needs copy reloc or the symbol is undefined |
04ebc307 | 3330 | when building executable. Copy dynamic function pointer |
aec6b87e L |
3331 | relocations. Don't generate dynamic relocations against |
3332 | resolved undefined weak symbols in PIE. */ | |
0e1862bb | 3333 | if ((bfd_link_pic (info) |
aec6b87e | 3334 | && !(bfd_link_pie (info) |
fd9edc90 | 3335 | && h != NULL |
6333bc0d L |
3336 | && (h->needs_copy |
3337 | || eh->needs_copy | |
3338 | || h->root.type == bfd_link_hash_undefined) | |
d8457a04 L |
3339 | && (IS_X86_64_PCREL_TYPE (r_type) |
3340 | || r_type == R_X86_64_SIZE32 | |
3341 | || r_type == R_X86_64_SIZE64)) | |
4bc6e03a | 3342 | && (h == NULL |
aec6b87e L |
3343 | || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
3344 | && !resolved_to_zero) | |
3345 | || h->root.type != bfd_link_hash_undefweak)) | |
1788fc08 L |
3346 | && ((! IS_X86_64_PCREL_TYPE (r_type) |
3347 | && r_type != R_X86_64_SIZE32 | |
3348 | && r_type != R_X86_64_SIZE64) | |
d8045f23 | 3349 | || ! SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c | 3350 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 3351 | && !bfd_link_pic (info) |
c434dee6 AJ |
3352 | && h != NULL |
3353 | && h->dynindx != -1 | |
aec6b87e L |
3354 | && (!h->non_got_ref |
3355 | || eh->func_pointer_refcount > 0 | |
3356 | || (h->root.type == bfd_link_hash_undefweak | |
3357 | && !resolved_to_zero)) | |
bae420ef L |
3358 | && ((h->def_dynamic && !h->def_regular) |
3359 | /* Undefined weak symbol is bound locally when | |
3360 | PIC is false. */ | |
0f88be7a | 3361 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
3362 | { |
3363 | Elf_Internal_Rela outrel; | |
b34976b6 | 3364 | bfd_boolean skip, relocate; |
c434dee6 | 3365 | asection *sreloc; |
70256ad8 AJ |
3366 | |
3367 | /* When generating a shared object, these relocations | |
3368 | are copied into the output file to be resolved at run | |
407443a3 | 3369 | time. */ |
b34976b6 AM |
3370 | skip = FALSE; |
3371 | relocate = FALSE; | |
70256ad8 | 3372 | |
c629eae0 JJ |
3373 | outrel.r_offset = |
3374 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 3375 | rel->r_offset); |
c629eae0 | 3376 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 3377 | skip = TRUE; |
0fb19cbc | 3378 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 3379 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
3380 | |
3381 | outrel.r_offset += (input_section->output_section->vma | |
3382 | + input_section->output_offset); | |
3383 | ||
3384 | if (skip) | |
0bb2d96a | 3385 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 3386 | |
fd8ab9e5 AJ |
3387 | /* h->dynindx may be -1 if this symbol was marked to |
3388 | become local. */ | |
3389 | else if (h != NULL | |
c434dee6 | 3390 | && h->dynindx != -1 |
d8045f23 | 3391 | && (IS_X86_64_PCREL_TYPE (r_type) |
4e0c91e4 L |
3392 | || !(bfd_link_executable (info) |
3393 | || SYMBOLIC_BIND (info, h)) | |
d8045f23 | 3394 | || ! h->def_regular)) |
70256ad8 | 3395 | { |
351f65ca | 3396 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 3397 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
3398 | } |
3399 | else | |
3400 | { | |
4c10bbaa L |
3401 | /* This symbol is local, or marked to become local. |
3402 | When relocation overflow check is disabled, we | |
3403 | convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
3404 | if (r_type == htab->pointer_r_type | |
3405 | || (r_type == R_X86_64_32 | |
3406 | && info->no_reloc_overflow_check)) | |
607c0e09 | 3407 | { |
b34976b6 | 3408 | relocate = TRUE; |
351f65ca | 3409 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
3410 | outrel.r_addend = relocation + rel->r_addend; |
3411 | } | |
64d25c44 L |
3412 | else if (r_type == R_X86_64_64 |
3413 | && !ABI_64_P (output_bfd)) | |
3414 | { | |
3415 | relocate = TRUE; | |
3416 | outrel.r_info = htab->r_info (0, | |
3417 | R_X86_64_RELATIVE64); | |
3418 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
3419 | /* Check addend overflow. */ |
3420 | if ((outrel.r_addend & 0x80000000) | |
3421 | != (rel->r_addend & 0x80000000)) | |
3422 | { | |
3423 | const char *name; | |
268a8d3a | 3424 | int addend = rel->r_addend; |
8cf0d2dd L |
3425 | if (h && h->root.root.string) |
3426 | name = h->root.root.string; | |
3427 | else | |
3428 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3429 | sym, NULL); | |
d42c267e AM |
3430 | _bfd_error_handler |
3431 | /* xgettext:c-format */ | |
3432 | (_("%B: addend %s%#x in relocation %s against " | |
3433 | "symbol `%s' at %#Lx in section `%A' is " | |
3434 | "out of range"), | |
3435 | input_bfd, addend < 0 ? "-" : "", addend, | |
3436 | howto->name, name, rel->r_offset, input_section); | |
8cf0d2dd L |
3437 | bfd_set_error (bfd_error_bad_value); |
3438 | return FALSE; | |
3439 | } | |
64d25c44 | 3440 | } |
607c0e09 AS |
3441 | else |
3442 | { | |
3443 | long sindx; | |
3444 | ||
8517fae7 | 3445 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
3446 | sindx = 0; |
3447 | else if (sec == NULL || sec->owner == NULL) | |
3448 | { | |
3449 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3450 | return FALSE; |
607c0e09 AS |
3451 | } |
3452 | else | |
3453 | { | |
3454 | asection *osec; | |
3455 | ||
74541ad4 AM |
3456 | /* We are turning this relocation into one |
3457 | against a section symbol. It would be | |
3458 | proper to subtract the symbol's value, | |
3459 | osec->vma, from the emitted reloc addend, | |
3460 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
3461 | osec = sec->output_section; |
3462 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
3463 | if (sindx == 0) |
3464 | { | |
3465 | asection *oi = htab->elf.text_index_section; | |
3466 | sindx = elf_section_data (oi)->dynindx; | |
3467 | } | |
3468 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
3469 | } |
3470 | ||
351f65ca | 3471 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
3472 | outrel.r_addend = relocation + rel->r_addend; |
3473 | } | |
70256ad8 AJ |
3474 | } |
3475 | ||
cbe950e9 | 3476 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 3477 | |
62d78908 L |
3478 | if (sreloc == NULL || sreloc->contents == NULL) |
3479 | { | |
3480 | r = bfd_reloc_notsupported; | |
3481 | goto check_relocation_error; | |
3482 | } | |
c434dee6 | 3483 | |
351f65ca | 3484 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
3485 | |
3486 | /* If this reloc is against an external symbol, we do | |
3487 | not want to fiddle with the addend. Otherwise, we | |
3488 | need to include the symbol value so that it becomes | |
3489 | an addend for the dynamic reloc. */ | |
0f88be7a | 3490 | if (! relocate) |
70256ad8 AJ |
3491 | continue; |
3492 | } | |
3493 | ||
3494 | break; | |
3495 | ||
bffbf940 | 3496 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
3497 | case R_X86_64_GOTPC32_TLSDESC: |
3498 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 3499 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
3500 | tls_type = GOT_UNKNOWN; |
3501 | if (h == NULL && local_got_offsets) | |
0afcef53 | 3502 | tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 3503 | else if (h != NULL) |
0afcef53 | 3504 | tls_type = elf_x86_hash_entry (h)->tls_type; |
142411ca | 3505 | |
351f65ca L |
3506 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3507 | input_section, contents, | |
3508 | symtab_hdr, sym_hashes, | |
3509 | &r_type, tls_type, rel, | |
bedfd056 | 3510 | relend, h, r_symndx, TRUE)) |
534a31f6 | 3511 | return FALSE; |
bffbf940 JJ |
3512 | |
3513 | if (r_type == R_X86_64_TPOFF32) | |
3514 | { | |
142411ca L |
3515 | bfd_vma roff = rel->r_offset; |
3516 | ||
bffbf940 | 3517 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 3518 | |
351f65ca | 3519 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 3520 | { |
52bc799a | 3521 | /* GD->LE transition. For 64bit, change |
e2cbcd91 L |
3522 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3523 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3524 | or | |
3525 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3526 | .byte 0x66; rex64 | |
3527 | call *__tls_get_addr@GOTPCREL(%rip) | |
3528 | which may be converted to | |
3529 | addr32 call __tls_get_addr | |
52bc799a | 3530 | into: |
e2cbcd91 L |
3531 | movq %fs:0, %rax |
3532 | leaq foo@tpoff(%rax), %rax | |
52bc799a | 3533 | For 32bit, change |
e2cbcd91 L |
3534 | leaq foo@tlsgd(%rip), %rdi |
3535 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3536 | or | |
3537 | leaq foo@tlsgd(%rip), %rdi | |
3538 | .byte 0x66; rex64 | |
3539 | call *__tls_get_addr@GOTPCREL(%rip) | |
3540 | which may be converted to | |
3541 | addr32 call __tls_get_addr | |
52bc799a | 3542 | into: |
e2cbcd91 L |
3543 | movl %fs:0, %eax |
3544 | leaq foo@tpoff(%rax), %rax | |
5c98a14e | 3545 | For largepic, change: |
e2cbcd91 L |
3546 | leaq foo@tlsgd(%rip), %rdi |
3547 | movabsq $__tls_get_addr@pltoff, %rax | |
3548 | addq %r15, %rax | |
3549 | call *%rax | |
5c98a14e | 3550 | into: |
e2cbcd91 L |
3551 | movq %fs:0, %rax |
3552 | leaq foo@tpoff(%rax), %rax | |
3553 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 3554 | int largepic = 0; |
e2cbcd91 | 3555 | if (ABI_64_P (output_bfd)) |
5c98a14e | 3556 | { |
e2cbcd91 L |
3557 | if (contents[roff + 5] == 0xb8) |
3558 | { | |
3559 | memcpy (contents + roff - 3, | |
3560 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
3561 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
3562 | largepic = 1; | |
3563 | } | |
3564 | else | |
3565 | memcpy (contents + roff - 4, | |
3566 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3567 | 16); | |
5c98a14e | 3568 | } |
52bc799a L |
3569 | else |
3570 | memcpy (contents + roff - 3, | |
3571 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3572 | 15); | |
eb4ff4d6 | 3573 | bfd_put_32 (output_bfd, |
351f65ca | 3574 | elf_x86_64_tpoff (info, relocation), |
5c98a14e | 3575 | contents + roff + 8 + largepic); |
e2cbcd91 L |
3576 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, |
3577 | R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */ | |
bffbf940 | 3578 | rel++; |
60f2e42e | 3579 | wrel++; |
bffbf940 JJ |
3580 | continue; |
3581 | } | |
351f65ca | 3582 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
3583 | { |
3584 | /* GDesc -> LE transition. | |
3585 | It's originally something like: | |
3586 | leaq x@tlsdesc(%rip), %rax | |
3587 | ||
3588 | Change it to: | |
c9736ba0 | 3589 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 3590 | |
c9736ba0 | 3591 | unsigned int val, type; |
67a4f2b7 | 3592 | |
67a4f2b7 | 3593 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 3594 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
3595 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
3596 | contents + roff - 3); | |
3597 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
3598 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3599 | contents + roff - 1); | |
eb4ff4d6 | 3600 | bfd_put_32 (output_bfd, |
351f65ca | 3601 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
3602 | contents + roff); |
3603 | continue; | |
3604 | } | |
351f65ca | 3605 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
3606 | { |
3607 | /* GDesc -> LE transition. | |
3608 | It's originally: | |
3609 | call *(%rax) | |
3610 | Turn it into: | |
142411ca | 3611 | xchg %ax,%ax. */ |
10efb593 | 3612 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
3613 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3614 | continue; | |
3615 | } | |
351f65ca | 3616 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 3617 | { |
bffbf940 | 3618 | /* IE->LE transition: |
cf61b747 | 3619 | For 64bit, originally it can be one of: |
bffbf940 JJ |
3620 | movq foo@gottpoff(%rip), %reg |
3621 | addq foo@gottpoff(%rip), %reg | |
3622 | We change it into: | |
3623 | movq $foo, %reg | |
3624 | leaq foo(%reg), %reg | |
cf61b747 L |
3625 | addq $foo, %reg. |
3626 | For 32bit, originally it can be one of: | |
3627 | movq foo@gottpoff(%rip), %reg | |
3628 | addl foo@gottpoff(%rip), %reg | |
3629 | We change it into: | |
3630 | movq $foo, %reg | |
3631 | leal foo(%reg), %reg | |
3632 | addl $foo, %reg. */ | |
142411ca L |
3633 | |
3634 | unsigned int val, type, reg; | |
3635 | ||
cf61b747 L |
3636 | if (roff >= 3) |
3637 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
3638 | else | |
3639 | val = 0; | |
142411ca L |
3640 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
3641 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 3642 | reg >>= 3; |
bffbf940 JJ |
3643 | if (type == 0x8b) |
3644 | { | |
3645 | /* movq */ | |
3646 | if (val == 0x4c) | |
3647 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3648 | contents + roff - 3); |
4a4c5f25 L |
3649 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3650 | bfd_put_8 (output_bfd, 0x41, | |
3651 | contents + roff - 3); | |
bffbf940 | 3652 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 3653 | contents + roff - 2); |
bffbf940 | 3654 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3655 | contents + roff - 1); |
bffbf940 JJ |
3656 | } |
3657 | else if (reg == 4) | |
3658 | { | |
cf61b747 L |
3659 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
3660 | is special */ | |
bffbf940 JJ |
3661 | if (val == 0x4c) |
3662 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3663 | contents + roff - 3); |
4a4c5f25 L |
3664 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3665 | bfd_put_8 (output_bfd, 0x41, | |
3666 | contents + roff - 3); | |
bffbf940 | 3667 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 3668 | contents + roff - 2); |
bffbf940 | 3669 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3670 | contents + roff - 1); |
bffbf940 JJ |
3671 | } |
3672 | else | |
3673 | { | |
cf61b747 | 3674 | /* addq/addl -> leaq/leal */ |
bffbf940 JJ |
3675 | if (val == 0x4c) |
3676 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 3677 | contents + roff - 3); |
4a4c5f25 L |
3678 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3679 | bfd_put_8 (output_bfd, 0x45, | |
3680 | contents + roff - 3); | |
bffbf940 | 3681 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 3682 | contents + roff - 2); |
bffbf940 | 3683 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 3684 | contents + roff - 1); |
bffbf940 | 3685 | } |
eb4ff4d6 | 3686 | bfd_put_32 (output_bfd, |
351f65ca | 3687 | elf_x86_64_tpoff (info, relocation), |
142411ca | 3688 | contents + roff); |
bffbf940 JJ |
3689 | continue; |
3690 | } | |
142411ca L |
3691 | else |
3692 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
3693 | } |
3694 | ||
6de2ae4a | 3695 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3696 | abort (); |
3697 | ||
3698 | if (h != NULL) | |
67a4f2b7 AO |
3699 | { |
3700 | off = h->got.offset; | |
0afcef53 | 3701 | offplt = elf_x86_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 3702 | } |
bffbf940 JJ |
3703 | else |
3704 | { | |
3705 | if (local_got_offsets == NULL) | |
3706 | abort (); | |
3707 | ||
3708 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 3709 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
3710 | } |
3711 | ||
3712 | if ((off & 1) != 0) | |
3713 | off &= ~1; | |
26e41594 | 3714 | else |
bffbf940 JJ |
3715 | { |
3716 | Elf_Internal_Rela outrel; | |
bffbf940 | 3717 | int dr_type, indx; |
67a4f2b7 | 3718 | asection *sreloc; |
bffbf940 | 3719 | |
6de2ae4a | 3720 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3721 | abort (); |
3722 | ||
67a4f2b7 AO |
3723 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3724 | ||
3725 | if (GOT_TLS_GDESC_P (tls_type)) | |
3726 | { | |
351f65ca | 3727 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 3728 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
3729 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
3730 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
3731 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3732 | + offplt |
3733 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 3734 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 3735 | if (indx == 0) |
0afcef53 | 3736 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
67a4f2b7 AO |
3737 | else |
3738 | outrel.r_addend = 0; | |
351f65ca | 3739 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
3740 | } |
3741 | ||
6de2ae4a | 3742 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 3743 | |
6de2ae4a L |
3744 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3745 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 3746 | |
67a4f2b7 | 3747 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 3748 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
3749 | else if (GOT_TLS_GDESC_P (tls_type)) |
3750 | goto dr_done; | |
bffbf940 JJ |
3751 | else |
3752 | dr_type = R_X86_64_TPOFF64; | |
3753 | ||
6de2ae4a | 3754 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 3755 | outrel.r_addend = 0; |
67a4f2b7 AO |
3756 | if ((dr_type == R_X86_64_TPOFF64 |
3757 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
0afcef53 | 3758 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
351f65ca | 3759 | outrel.r_info = htab->r_info (indx, dr_type); |
bffbf940 | 3760 | |
351f65ca | 3761 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 3762 | |
67a4f2b7 | 3763 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
3764 | { |
3765 | if (indx == 0) | |
3766 | { | |
d40d037c | 3767 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 3768 | bfd_put_64 (output_bfd, |
0afcef53 | 3769 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3770 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
3771 | } |
3772 | else | |
3773 | { | |
3774 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3775 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 3776 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
3777 | R_X86_64_DTPOFF64); |
3778 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 3779 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 3780 | &outrel); |
bffbf940 JJ |
3781 | } |
3782 | } | |
3783 | ||
67a4f2b7 | 3784 | dr_done: |
bffbf940 JJ |
3785 | if (h != NULL) |
3786 | h->got.offset |= 1; | |
3787 | else | |
3788 | local_got_offsets[r_symndx] |= 1; | |
3789 | } | |
3790 | ||
67a4f2b7 AO |
3791 | if (off >= (bfd_vma) -2 |
3792 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 3793 | abort (); |
351f65ca | 3794 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 3795 | { |
67a4f2b7 AO |
3796 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
3797 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
3798 | relocation = htab->elf.sgotplt->output_section->vma |
3799 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3800 | + offplt + htab->sgotplt_jump_table_size; |
3801 | else | |
6de2ae4a L |
3802 | relocation = htab->elf.sgot->output_section->vma |
3803 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3804 | unresolved_reloc = FALSE; |
bffbf940 | 3805 | } |
142411ca | 3806 | else |
67a4f2b7 | 3807 | { |
142411ca | 3808 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 3809 | |
351f65ca | 3810 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 3811 | { |
52bc799a | 3812 | /* GD->IE transition. For 64bit, change |
e2cbcd91 L |
3813 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3814 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3815 | or | |
3816 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3817 | .byte 0x66; rex64 | |
3818 | call *__tls_get_addr@GOTPCREL(%rip | |
3819 | which may be converted to | |
3820 | addr32 call __tls_get_addr | |
52bc799a | 3821 | into: |
e2cbcd91 L |
3822 | movq %fs:0, %rax |
3823 | addq foo@gottpoff(%rip), %rax | |
52bc799a | 3824 | For 32bit, change |
e2cbcd91 L |
3825 | leaq foo@tlsgd(%rip), %rdi |
3826 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3827 | or | |
3828 | leaq foo@tlsgd(%rip), %rdi | |
3829 | .byte 0x66; rex64; | |
3830 | call *__tls_get_addr@GOTPCREL(%rip) | |
3831 | which may be converted to | |
3832 | addr32 call __tls_get_addr | |
52bc799a | 3833 | into: |
e2cbcd91 L |
3834 | movl %fs:0, %eax |
3835 | addq foo@gottpoff(%rip), %rax | |
5c98a14e | 3836 | For largepic, change: |
e2cbcd91 L |
3837 | leaq foo@tlsgd(%rip), %rdi |
3838 | movabsq $__tls_get_addr@pltoff, %rax | |
3839 | addq %r15, %rax | |
3840 | call *%rax | |
5c98a14e | 3841 | into: |
e2cbcd91 L |
3842 | movq %fs:0, %rax |
3843 | addq foo@gottpoff(%rax), %rax | |
3844 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 3845 | int largepic = 0; |
e2cbcd91 | 3846 | if (ABI_64_P (output_bfd)) |
5c98a14e | 3847 | { |
e2cbcd91 L |
3848 | if (contents[roff + 5] == 0xb8) |
3849 | { | |
3850 | memcpy (contents + roff - 3, | |
3851 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
3852 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
3853 | largepic = 1; | |
3854 | } | |
3855 | else | |
3856 | memcpy (contents + roff - 4, | |
3857 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3858 | 16); | |
5c98a14e | 3859 | } |
52bc799a L |
3860 | else |
3861 | memcpy (contents + roff - 3, | |
3862 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3863 | 15); | |
142411ca | 3864 | |
6de2ae4a L |
3865 | relocation = (htab->elf.sgot->output_section->vma |
3866 | + htab->elf.sgot->output_offset + off | |
142411ca | 3867 | - roff |
5c98a14e | 3868 | - largepic |
142411ca L |
3869 | - input_section->output_section->vma |
3870 | - input_section->output_offset | |
3871 | - 12); | |
3872 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
3873 | contents + roff + 8 + largepic); |
3874 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 3875 | rel++; |
60f2e42e | 3876 | wrel++; |
142411ca L |
3877 | continue; |
3878 | } | |
351f65ca | 3879 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
3880 | { |
3881 | /* GDesc -> IE transition. | |
3882 | It's originally something like: | |
3883 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 3884 | |
142411ca | 3885 | Change it to: |
c9736ba0 | 3886 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 3887 | |
142411ca L |
3888 | /* Now modify the instruction as appropriate. To |
3889 | turn a leaq into a movq in the form we use it, it | |
3890 | suffices to change the second byte from 0x8d to | |
3891 | 0x8b. */ | |
3892 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
3893 | ||
3894 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
3895 | htab->elf.sgot->output_section->vma |
3896 | + htab->elf.sgot->output_offset + off | |
142411ca L |
3897 | - rel->r_offset |
3898 | - input_section->output_section->vma | |
3899 | - input_section->output_offset | |
3900 | - 4, | |
3901 | contents + roff); | |
3902 | continue; | |
3903 | } | |
351f65ca | 3904 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
3905 | { |
3906 | /* GDesc -> IE transition. | |
3907 | It's originally: | |
3908 | call *(%rax) | |
3909 | ||
3910 | Change it to: | |
c9736ba0 | 3911 | xchg %ax, %ax. */ |
142411ca | 3912 | |
142411ca L |
3913 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
3914 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
3915 | continue; | |
3916 | } | |
3917 | else | |
3918 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 3919 | } |
bffbf940 JJ |
3920 | break; |
3921 | ||
3922 | case R_X86_64_TLSLD: | |
351f65ca L |
3923 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3924 | input_section, contents, | |
3925 | symtab_hdr, sym_hashes, | |
bedfd056 L |
3926 | &r_type, GOT_UNKNOWN, rel, |
3927 | relend, h, r_symndx, TRUE)) | |
142411ca | 3928 | return FALSE; |
a3fadc9a | 3929 | |
142411ca L |
3930 | if (r_type != R_X86_64_TLSLD) |
3931 | { | |
bffbf940 | 3932 | /* LD->LE transition: |
e2cbcd91 L |
3933 | leaq foo@tlsld(%rip), %rdi |
3934 | call __tls_get_addr@PLT | |
3935 | For 64bit, we change it into: | |
3936 | .word 0x6666; .byte 0x66; movq %fs:0, %rax | |
3937 | For 32bit, we change it into: | |
3938 | nopl 0x0(%rax); movl %fs:0, %eax | |
3939 | Or | |
3940 | leaq foo@tlsld(%rip), %rdi; | |
3941 | call *__tls_get_addr@GOTPCREL(%rip) | |
3942 | which may be converted to | |
3943 | addr32 call __tls_get_addr | |
52bc799a | 3944 | For 64bit, we change it into: |
e2cbcd91 | 3945 | .word 0x6666; .word 0x6666; movq %fs:0, %rax |
52bc799a | 3946 | For 32bit, we change it into: |
e2cbcd91 | 3947 | nopw 0x0(%rax); movl %fs:0, %eax |
5c98a14e | 3948 | For largepic, change: |
e2cbcd91 L |
3949 | leaq foo@tlsgd(%rip), %rdi |
3950 | movabsq $__tls_get_addr@pltoff, %rax | |
3951 | addq %rbx, %rax | |
3952 | call *%rax | |
3953 | into | |
3954 | data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
3955 | movq %fs:0, %eax */ | |
142411ca L |
3956 | |
3957 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
e2cbcd91 L |
3958 | if (ABI_64_P (output_bfd)) |
3959 | { | |
3960 | if (contents[rel->r_offset + 5] == 0xb8) | |
3961 | memcpy (contents + rel->r_offset - 3, | |
3962 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
3963 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
3964 | else if (contents[rel->r_offset + 4] == 0xff | |
3965 | || contents[rel->r_offset + 4] == 0x67) | |
3966 | memcpy (contents + rel->r_offset - 3, | |
3967 | "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", | |
3968 | 13); | |
3969 | else | |
3970 | memcpy (contents + rel->r_offset - 3, | |
3971 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
3972 | } | |
52bc799a | 3973 | else |
e2cbcd91 L |
3974 | { |
3975 | if (contents[rel->r_offset + 4] == 0xff) | |
3976 | memcpy (contents + rel->r_offset - 3, | |
3977 | "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", | |
3978 | 13); | |
3979 | else | |
3980 | memcpy (contents + rel->r_offset - 3, | |
3981 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
3982 | } | |
3983 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX | |
3984 | and R_X86_64_PLTOFF64. */ | |
bffbf940 | 3985 | rel++; |
60f2e42e | 3986 | wrel++; |
bffbf940 JJ |
3987 | continue; |
3988 | } | |
3989 | ||
6de2ae4a | 3990 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3991 | abort (); |
3992 | ||
0afcef53 | 3993 | off = htab->tls_ld_or_ldm_got.offset; |
bffbf940 JJ |
3994 | if (off & 1) |
3995 | off &= ~1; | |
3996 | else | |
3997 | { | |
3998 | Elf_Internal_Rela outrel; | |
bffbf940 | 3999 | |
6de2ae4a | 4000 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
4001 | abort (); |
4002 | ||
6de2ae4a L |
4003 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4004 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
4005 | |
4006 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 4007 | htab->elf.sgot->contents + off); |
bffbf940 | 4008 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 4009 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 4010 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 4011 | outrel.r_addend = 0; |
351f65ca | 4012 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 4013 | &outrel); |
0afcef53 | 4014 | htab->tls_ld_or_ldm_got.offset |= 1; |
bffbf940 | 4015 | } |
6de2ae4a L |
4016 | relocation = htab->elf.sgot->output_section->vma |
4017 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 4018 | unresolved_reloc = FALSE; |
bffbf940 JJ |
4019 | break; |
4020 | ||
4021 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
4022 | if (!bfd_link_executable (info) |
4023 | || (input_section->flags & SEC_CODE) == 0) | |
0afcef53 | 4024 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
bffbf940 | 4025 | else |
351f65ca | 4026 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
4027 | break; |
4028 | ||
4029 | case R_X86_64_TPOFF32: | |
6769d501 | 4030 | case R_X86_64_TPOFF64: |
0e1862bb | 4031 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 4032 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
4033 | break; |
4034 | ||
a69ed7f7 L |
4035 | case R_X86_64_DTPOFF64: |
4036 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
0afcef53 | 4037 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
a69ed7f7 L |
4038 | break; |
4039 | ||
70256ad8 AJ |
4040 | default: |
4041 | break; | |
4042 | } | |
8d88c4ca | 4043 | |
239e1f3a AM |
4044 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
4045 | because such sections are not SEC_ALLOC and thus ld.so will | |
4046 | not process them. */ | |
c434dee6 | 4047 | if (unresolved_reloc |
239e1f3a | 4048 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
4049 | && h->def_dynamic) |
4050 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
4051 | rel->r_offset) != (bfd_vma) -1) | |
a040981f | 4052 | { |
7073b5b9 L |
4053 | switch (r_type) |
4054 | { | |
4055 | case R_X86_64_32S: | |
a5b4ee94 L |
4056 | sec = h->root.u.def.section; |
4057 | if ((info->nocopyreloc | |
4058 | || (eh->def_protected | |
4059 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
4060 | && !(h->root.u.def.section->flags & SEC_CODE)) |
4061 | return elf_x86_64_need_pic (info, input_bfd, input_section, | |
4062 | h, NULL, NULL, howto); | |
4063 | /* Fall through. */ | |
4064 | ||
4065 | default: | |
4066 | _bfd_error_handler | |
4067 | /* xgettext:c-format */ | |
4068 | (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"), | |
4069 | input_bfd, | |
4070 | input_section, | |
4071 | rel->r_offset, | |
4072 | howto->name, | |
4073 | h->root.root.string); | |
4074 | return FALSE; | |
4075 | } | |
a040981f | 4076 | } |
c434dee6 | 4077 | |
cbe950e9 | 4078 | do_relocation: |
8d88c4ca | 4079 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
4080 | contents, rel->r_offset, |
4081 | relocation, rel->r_addend); | |
8d88c4ca | 4082 | |
62d78908 | 4083 | check_relocation_error: |
8d88c4ca | 4084 | if (r != bfd_reloc_ok) |
8da6118f | 4085 | { |
c434dee6 AJ |
4086 | const char *name; |
4087 | ||
4088 | if (h != NULL) | |
4089 | name = h->root.root.string; | |
4090 | else | |
8da6118f | 4091 | { |
c434dee6 AJ |
4092 | name = bfd_elf_string_from_elf_section (input_bfd, |
4093 | symtab_hdr->sh_link, | |
4094 | sym->st_name); | |
4095 | if (name == NULL) | |
b34976b6 | 4096 | return FALSE; |
c434dee6 AJ |
4097 | if (*name == '\0') |
4098 | name = bfd_section_name (input_bfd, sec); | |
4099 | } | |
4100 | ||
4101 | if (r == bfd_reloc_overflow) | |
1a72702b AM |
4102 | (*info->callbacks->reloc_overflow) |
4103 | (info, (h ? &h->root : NULL), name, howto->name, | |
4104 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
c434dee6 AJ |
4105 | else |
4106 | { | |
4eca0228 | 4107 | _bfd_error_handler |
695344c0 | 4108 | /* xgettext:c-format */ |
d42c267e | 4109 | (_("%B(%A+%#Lx): reloc against `%s': error %d"), |
d003868e | 4110 | input_bfd, input_section, |
d42c267e | 4111 | rel->r_offset, name, (int) r); |
b34976b6 | 4112 | return FALSE; |
8da6118f KH |
4113 | } |
4114 | } | |
60f2e42e L |
4115 | |
4116 | if (wrel != rel) | |
4117 | *wrel = *rel; | |
4118 | } | |
4119 | ||
4120 | if (wrel != rel) | |
4121 | { | |
4122 | Elf_Internal_Shdr *rel_hdr; | |
4123 | size_t deleted = rel - wrel; | |
4124 | ||
4125 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
4126 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
4127 | if (rel_hdr->sh_size == 0) | |
4128 | { | |
4129 | /* It is too late to remove an empty reloc section. Leave | |
4130 | one NONE reloc. | |
4131 | ??? What is wrong with an empty section??? */ | |
4132 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
4133 | deleted -= 1; | |
4134 | } | |
4135 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
4136 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
4137 | input_section->reloc_count -= deleted; | |
8d88c4ca | 4138 | } |
70256ad8 | 4139 | |
b34976b6 | 4140 | return TRUE; |
70256ad8 AJ |
4141 | } |
4142 | ||
4143 | /* Finish up dynamic symbol handling. We set the contents of various | |
4144 | dynamic sections here. */ | |
4145 | ||
b34976b6 | 4146 | static bfd_boolean |
351f65ca L |
4147 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
4148 | struct bfd_link_info *info, | |
4149 | struct elf_link_hash_entry *h, | |
aec6b87e | 4150 | Elf_Internal_Sym *sym) |
70256ad8 | 4151 | { |
0afcef53 | 4152 | struct elf_x86_link_hash_table *htab; |
f2c29a16 | 4153 | bfd_boolean use_plt_second; |
0afcef53 | 4154 | struct elf_x86_link_hash_entry *eh; |
aec6b87e | 4155 | bfd_boolean local_undefweak; |
70256ad8 | 4156 | |
0afcef53 | 4157 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
4158 | if (htab == NULL) |
4159 | return FALSE; | |
70256ad8 | 4160 | |
f2c29a16 L |
4161 | /* Use the second PLT section only if there is .plt section. */ |
4162 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
0ff2b86e | 4163 | |
0afcef53 | 4164 | eh = (struct elf_x86_link_hash_entry *) h; |
9e9821dd L |
4165 | if (eh->no_finish_dynamic_symbol) |
4166 | abort (); | |
dd7e64d4 | 4167 | |
aec6b87e L |
4168 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
4169 | resolved undefined weak symbols in executable so that their | |
4170 | references have value 0 at run-time. */ | |
e62b9723 | 4171 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
0afcef53 | 4172 | X86_64_ELF_DATA, |
e62b9723 L |
4173 | eh->has_got_reloc, |
4174 | eh); | |
aec6b87e | 4175 | |
70256ad8 AJ |
4176 | if (h->plt.offset != (bfd_vma) -1) |
4177 | { | |
70256ad8 | 4178 | bfd_vma plt_index; |
38b12349 | 4179 | bfd_vma got_offset, plt_offset; |
70256ad8 | 4180 | Elf_Internal_Rela rela; |
947216bf | 4181 | bfd_byte *loc; |
0ff2b86e | 4182 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 4183 | const struct elf_backend_data *bed; |
5974eba6 | 4184 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
4185 | |
4186 | /* When building a static executable, use .iplt, .igot.plt and | |
4187 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 4188 | if (htab->elf.splt != NULL) |
cbe950e9 | 4189 | { |
6de2ae4a L |
4190 | plt = htab->elf.splt; |
4191 | gotplt = htab->elf.sgotplt; | |
4192 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
4193 | } |
4194 | else | |
4195 | { | |
6de2ae4a L |
4196 | plt = htab->elf.iplt; |
4197 | gotplt = htab->elf.igotplt; | |
4198 | relplt = htab->elf.irelplt; | |
cbe950e9 | 4199 | } |
70256ad8 AJ |
4200 | |
4201 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 4202 | it up. */ |
cbe950e9 | 4203 | if ((h->dynindx == -1 |
aec6b87e | 4204 | && !local_undefweak |
0e1862bb | 4205 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
4206 | && h->def_regular |
4207 | && h->type == STT_GNU_IFUNC)) | |
4208 | || plt == NULL | |
4209 | || gotplt == NULL | |
4210 | || relplt == NULL) | |
cec7f46a | 4211 | abort (); |
70256ad8 AJ |
4212 | |
4213 | /* Get the index in the procedure linkage table which | |
4214 | corresponds to this symbol. This is the index of this symbol | |
4215 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 4216 | first entry in the procedure linkage table is reserved. |
6bbec505 | 4217 | |
cbe950e9 | 4218 | Get the offset into the .got table of the entry that |
407443a3 | 4219 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
4220 | bytes. The first three are reserved for the dynamic linker. |
4221 | ||
4222 | For static executables, we don't reserve anything. */ | |
4223 | ||
6de2ae4a | 4224 | if (plt == htab->elf.splt) |
cbe950e9 | 4225 | { |
765e526c L |
4226 | got_offset = (h->plt.offset / htab->plt.plt_entry_size |
4227 | - htab->plt.has_plt0); | |
e1f98742 | 4228 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
4229 | } |
4230 | else | |
4231 | { | |
765e526c | 4232 | got_offset = h->plt.offset / htab->plt.plt_entry_size; |
e1f98742 | 4233 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 4234 | } |
70256ad8 | 4235 | |
38b12349 | 4236 | /* Fill in the entry in the procedure linkage table. */ |
765e526c L |
4237 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, |
4238 | htab->plt.plt_entry_size); | |
f2c29a16 | 4239 | if (use_plt_second) |
0ff2b86e | 4240 | { |
f2c29a16 | 4241 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
765e526c L |
4242 | htab->non_lazy_plt->plt_entry, |
4243 | htab->non_lazy_plt->plt_entry_size); | |
0ff2b86e | 4244 | |
f2c29a16 L |
4245 | resolved_plt = htab->plt_second; |
4246 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
4247 | } |
4248 | else | |
4249 | { | |
0ff2b86e L |
4250 | resolved_plt = plt; |
4251 | plt_offset = h->plt.offset; | |
4252 | } | |
eed180f8 RM |
4253 | |
4254 | /* Insert the relocation positions of the plt section. */ | |
4255 | ||
4256 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
4257 | subtracting the size of that instruction. */ | |
ab7fede8 L |
4258 | plt_got_pcrel_offset = (gotplt->output_section->vma |
4259 | + gotplt->output_offset | |
4260 | + got_offset | |
4261 | - resolved_plt->output_section->vma | |
4262 | - resolved_plt->output_offset | |
4263 | - plt_offset | |
765e526c | 4264 | - htab->plt.plt_got_insn_size); |
ab7fede8 L |
4265 | |
4266 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 4267 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
695344c0 | 4268 | /* xgettext:c-format */ |
ab7fede8 L |
4269 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"), |
4270 | output_bfd, h->root.root.string); | |
4271 | ||
4272 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
38b12349 | 4273 | (resolved_plt->contents + plt_offset |
765e526c | 4274 | + htab->plt.plt_got_offset)); |
cbe950e9 | 4275 | |
653165cc | 4276 | /* Fill in the entry in the global offset table, initially this |
aec6b87e L |
4277 | points to the second part of the PLT entry. Leave the entry |
4278 | as zero for undefined weak symbol in PIE. No PLT relocation | |
4279 | against undefined weak symbol in PIE. */ | |
4280 | if (!local_undefweak) | |
cbe950e9 | 4281 | { |
765e526c | 4282 | if (htab->plt.has_plt0) |
38b12349 L |
4283 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4284 | + plt->output_offset | |
4285 | + h->plt.offset | |
765e526c | 4286 | + htab->lazy_plt->plt_lazy_offset), |
38b12349 | 4287 | gotplt->contents + got_offset); |
aec6b87e L |
4288 | |
4289 | /* Fill in the entry in the .rela.plt section. */ | |
4290 | rela.r_offset = (gotplt->output_section->vma | |
4291 | + gotplt->output_offset | |
4292 | + got_offset); | |
4293 | if (h->dynindx == -1 | |
4294 | || ((bfd_link_executable (info) | |
4295 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
4296 | && h->def_regular | |
4297 | && h->type == STT_GNU_IFUNC)) | |
4298 | { | |
6322e5c5 L |
4299 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
4300 | h->root.root.string, | |
4301 | h->root.u.def.section->owner); | |
4302 | ||
aec6b87e L |
4303 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
4304 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
4305 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); | |
4306 | rela.r_addend = (h->root.u.def.value | |
4307 | + h->root.u.def.section->output_section->vma | |
4308 | + h->root.u.def.section->output_offset); | |
4309 | /* R_X86_64_IRELATIVE comes last. */ | |
4310 | plt_index = htab->next_irelative_index--; | |
4311 | } | |
4312 | else | |
4313 | { | |
4314 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); | |
4315 | rela.r_addend = 0; | |
4316 | plt_index = htab->next_jump_slot_index++; | |
4317 | } | |
e1f98742 | 4318 | |
38b12349 L |
4319 | /* Don't fill the second and third slots in PLT entry for |
4320 | static executables nor without PLT0. */ | |
765e526c | 4321 | if (plt == htab->elf.splt && htab->plt.has_plt0) |
aec6b87e | 4322 | { |
38b12349 | 4323 | bfd_vma plt0_offset |
765e526c | 4324 | = h->plt.offset + htab->lazy_plt->plt_plt_insn_end; |
aec6b87e L |
4325 | |
4326 | /* Put relocation index. */ | |
4327 | bfd_put_32 (output_bfd, plt_index, | |
4328 | (plt->contents + h->plt.offset | |
765e526c | 4329 | + htab->lazy_plt->plt_reloc_offset)); |
aec6b87e L |
4330 | |
4331 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
4332 | check relocation index for overflow since branch displacement | |
4333 | will overflow first. */ | |
4334 | if (plt0_offset > 0x80000000) | |
695344c0 | 4335 | /* xgettext:c-format */ |
aec6b87e L |
4336 | info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"), |
4337 | output_bfd, h->root.root.string); | |
4338 | bfd_put_32 (output_bfd, - plt0_offset, | |
38b12349 | 4339 | (plt->contents + h->plt.offset |
765e526c | 4340 | + htab->lazy_plt->plt_plt_offset)); |
aec6b87e | 4341 | } |
351f65ca | 4342 | |
aec6b87e L |
4343 | bed = get_elf_backend_data (output_bfd); |
4344 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
4345 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
4346 | } | |
dd7e64d4 L |
4347 | } |
4348 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
4349 | { | |
38b12349 | 4350 | bfd_vma got_offset, plt_offset; |
dd7e64d4 L |
4351 | asection *plt, *got; |
4352 | bfd_boolean got_after_plt; | |
4353 | int32_t got_pcrel_offset; | |
dd7e64d4 L |
4354 | |
4355 | /* Set the entry in the GOT procedure linkage table. */ | |
4356 | plt = htab->plt_got; | |
4357 | got = htab->elf.sgot; | |
4358 | got_offset = h->got.offset; | |
4359 | ||
4360 | if (got_offset == (bfd_vma) -1 | |
e492d2f8 | 4361 | || (h->type == STT_GNU_IFUNC && h->def_regular) |
dd7e64d4 L |
4362 | || plt == NULL |
4363 | || got == NULL) | |
4364 | abort (); | |
70256ad8 | 4365 | |
38b12349 | 4366 | /* Use the non-lazy PLT entry template for the GOT PLT since they |
dd7e64d4 | 4367 | are the identical. */ |
dd7e64d4 L |
4368 | /* Fill in the entry in the GOT procedure linkage table. */ |
4369 | plt_offset = eh->plt_got.offset; | |
4370 | memcpy (plt->contents + plt_offset, | |
765e526c L |
4371 | htab->non_lazy_plt->plt_entry, |
4372 | htab->non_lazy_plt->plt_entry_size); | |
dd7e64d4 L |
4373 | |
4374 | /* Put offset the PC-relative instruction referring to the GOT | |
4375 | entry, subtracting the size of that instruction. */ | |
4376 | got_pcrel_offset = (got->output_section->vma | |
4377 | + got->output_offset | |
4378 | + got_offset | |
4379 | - plt->output_section->vma | |
4380 | - plt->output_offset | |
4381 | - plt_offset | |
765e526c | 4382 | - htab->non_lazy_plt->plt_got_insn_size); |
dd7e64d4 L |
4383 | |
4384 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
4385 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
4386 | if ((got_after_plt && got_pcrel_offset < 0) | |
4387 | || (!got_after_plt && got_pcrel_offset > 0)) | |
695344c0 | 4388 | /* xgettext:c-format */ |
dd7e64d4 L |
4389 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"), |
4390 | output_bfd, h->root.root.string); | |
4391 | ||
4392 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
38b12349 | 4393 | (plt->contents + plt_offset |
765e526c | 4394 | + htab->non_lazy_plt->plt_got_offset)); |
dd7e64d4 L |
4395 | } |
4396 | ||
aec6b87e L |
4397 | if (!local_undefweak |
4398 | && !h->def_regular | |
dd7e64d4 L |
4399 | && (h->plt.offset != (bfd_vma) -1 |
4400 | || eh->plt_got.offset != (bfd_vma) -1)) | |
4401 | { | |
4402 | /* Mark the symbol as undefined, rather than as defined in | |
4403 | the .plt section. Leave the value if there were any | |
4404 | relocations where pointer equality matters (this is a clue | |
4405 | for the dynamic linker, to make function pointer | |
4406 | comparisons work between an application and shared | |
4407 | library), otherwise set it to zero. If a function is only | |
4408 | called from a binary, there is no need to slow down | |
4409 | shared libraries because of that. */ | |
4410 | sym->st_shndx = SHN_UNDEF; | |
4411 | if (!h->pointer_equality_needed) | |
4412 | sym->st_value = 0; | |
70256ad8 AJ |
4413 | } |
4414 | ||
aec6b87e L |
4415 | /* Don't generate dynamic GOT relocation against undefined weak |
4416 | symbol in executable. */ | |
bffbf940 | 4417 | if (h->got.offset != (bfd_vma) -1 |
0afcef53 L |
4418 | && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h)->tls_type) |
4419 | && elf_x86_hash_entry (h)->tls_type != GOT_TLS_IE | |
aec6b87e | 4420 | && !local_undefweak) |
053579d7 | 4421 | { |
053579d7 | 4422 | Elf_Internal_Rela rela; |
233cc9c1 | 4423 | asection *relgot = htab->elf.srelgot; |
053579d7 AJ |
4424 | |
4425 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 4426 | up. */ |
6de2ae4a | 4427 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 4428 | abort (); |
053579d7 | 4429 | |
6de2ae4a L |
4430 | rela.r_offset = (htab->elf.sgot->output_section->vma |
4431 | + htab->elf.sgot->output_offset | |
dc810e39 | 4432 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
4433 | |
4434 | /* If this is a static link, or it is a -Bsymbolic link and the | |
4435 | symbol is defined locally or was forced to be local because | |
4436 | of a version file, we just want to emit a RELATIVE reloc. | |
4437 | The entry in the global offset table will already have been | |
4438 | initialized in the relocate_section function. */ | |
710ab287 | 4439 | if (h->def_regular |
0018b0a3 L |
4440 | && h->type == STT_GNU_IFUNC) |
4441 | { | |
233cc9c1 L |
4442 | if (h->plt.offset == (bfd_vma) -1) |
4443 | { | |
4444 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
4445 | if (htab->elf.splt == NULL) | |
4446 | { | |
4447 | /* use .rel[a].iplt section to store .got relocations | |
4448 | in static executable. */ | |
4449 | relgot = htab->elf.irelplt; | |
4450 | } | |
4451 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
4452 | { | |
6322e5c5 L |
4453 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
4454 | output_bfd, | |
4455 | h->root.root.string, | |
4456 | h->root.u.def.section->owner); | |
4457 | ||
233cc9c1 L |
4458 | rela.r_info = htab->r_info (0, |
4459 | R_X86_64_IRELATIVE); | |
4460 | rela.r_addend = (h->root.u.def.value | |
4461 | + h->root.u.def.section->output_section->vma | |
4462 | + h->root.u.def.section->output_offset); | |
4463 | } | |
4464 | else | |
4465 | goto do_glob_dat; | |
4466 | } | |
4467 | else if (bfd_link_pic (info)) | |
710ab287 L |
4468 | { |
4469 | /* Generate R_X86_64_GLOB_DAT. */ | |
4470 | goto do_glob_dat; | |
4471 | } | |
4472 | else | |
4473 | { | |
90d60710 | 4474 | asection *plt; |
aab82f4c | 4475 | bfd_vma plt_offset; |
90d60710 | 4476 | |
710ab287 L |
4477 | if (!h->pointer_equality_needed) |
4478 | abort (); | |
4479 | ||
4480 | /* For non-shared object, we can't use .got.plt, which | |
4481 | contains the real function addres if we need pointer | |
4482 | equality. We load the GOT entry with the PLT entry. */ | |
f2c29a16 | 4483 | if (htab->plt_second != NULL) |
aab82f4c | 4484 | { |
f2c29a16 L |
4485 | plt = htab->plt_second; |
4486 | plt_offset = eh->plt_second.offset; | |
aab82f4c L |
4487 | } |
4488 | else | |
4489 | { | |
4490 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
4491 | plt_offset = h->plt.offset; | |
4492 | } | |
710ab287 L |
4493 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4494 | + plt->output_offset | |
aab82f4c | 4495 | + plt_offset), |
6de2ae4a | 4496 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
4497 | return TRUE; |
4498 | } | |
0018b0a3 | 4499 | } |
0e1862bb | 4500 | else if (bfd_link_pic (info) |
0018b0a3 | 4501 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
053579d7 | 4502 | { |
ad71ce8d | 4503 | if (!(h->def_regular || ELF_COMMON_DEF_P (h))) |
41bed6dd | 4504 | return FALSE; |
cc78d0af | 4505 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 4506 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
4507 | rela.r_addend = (h->root.u.def.value |
4508 | + h->root.u.def.section->output_section->vma | |
4509 | + h->root.u.def.section->output_offset); | |
4510 | } | |
4511 | else | |
4512 | { | |
4513 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 4514 | do_glob_dat: |
c434dee6 | 4515 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4516 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 4517 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
4518 | rela.r_addend = 0; |
4519 | } | |
4520 | ||
233cc9c1 | 4521 | elf_append_rela (output_bfd, relgot, &rela); |
053579d7 AJ |
4522 | } |
4523 | ||
f5385ebf | 4524 | if (h->needs_copy) |
70256ad8 | 4525 | { |
70256ad8 | 4526 | Elf_Internal_Rela rela; |
5474d94f | 4527 | asection *s; |
70256ad8 AJ |
4528 | |
4529 | /* This symbol needs a copy reloc. Set it up. */ | |
4530 | ||
c434dee6 AJ |
4531 | if (h->dynindx == -1 |
4532 | || (h->root.type != bfd_link_hash_defined | |
4533 | && h->root.type != bfd_link_hash_defweak) | |
5474d94f AM |
4534 | || htab->elf.srelbss == NULL |
4535 | || htab->elf.sreldynrelro == NULL) | |
c434dee6 | 4536 | abort (); |
70256ad8 AJ |
4537 | |
4538 | rela.r_offset = (h->root.u.def.value | |
4539 | + h->root.u.def.section->output_section->vma | |
4540 | + h->root.u.def.section->output_offset); | |
351f65ca | 4541 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 4542 | rela.r_addend = 0; |
afbf7e8e | 4543 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
4544 | s = htab->elf.sreldynrelro; |
4545 | else | |
4546 | s = htab->elf.srelbss; | |
4547 | elf_append_rela (output_bfd, s, &rela); | |
70256ad8 AJ |
4548 | } |
4549 | ||
b34976b6 | 4550 | return TRUE; |
70256ad8 AJ |
4551 | } |
4552 | ||
c25bc9fc L |
4553 | /* Finish up local dynamic symbol handling. We set the contents of |
4554 | various dynamic sections here. */ | |
4555 | ||
4556 | static bfd_boolean | |
351f65ca | 4557 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
4558 | { |
4559 | struct elf_link_hash_entry *h | |
4560 | = (struct elf_link_hash_entry *) *slot; | |
4561 | struct bfd_link_info *info | |
eed180f8 | 4562 | = (struct bfd_link_info *) inf; |
c25bc9fc | 4563 | |
351f65ca | 4564 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
5f0f0847 | 4565 | info, h, NULL); |
c25bc9fc L |
4566 | } |
4567 | ||
aec6b87e L |
4568 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
4569 | here since undefined weak symbol may not be dynamic and may not be | |
4570 | called for elf_x86_64_finish_dynamic_symbol. */ | |
4571 | ||
4572 | static bfd_boolean | |
4573 | elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
4574 | void *inf) | |
4575 | { | |
4576 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
4577 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
4578 | ||
4579 | if (h->root.type != bfd_link_hash_undefweak | |
4580 | || h->dynindx != -1) | |
4581 | return TRUE; | |
4582 | ||
4583 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, | |
5f0f0847 | 4584 | info, h, NULL); |
aec6b87e L |
4585 | } |
4586 | ||
c434dee6 AJ |
4587 | /* Used to decide how to sort relocs in an optimal manner for the |
4588 | dynamic linker, before writing them out. */ | |
4589 | ||
4590 | static enum elf_reloc_type_class | |
cae1fbbb | 4591 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
4592 | const asection *rel_sec ATTRIBUTE_UNUSED, |
4593 | const Elf_Internal_Rela *rela) | |
c434dee6 | 4594 | { |
cae1fbbb L |
4595 | bfd *abfd = info->output_bfd; |
4596 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
0afcef53 L |
4597 | struct elf_x86_link_hash_table *htab |
4598 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
cae1fbbb | 4599 | |
d9e3b590 L |
4600 | if (htab->elf.dynsym != NULL |
4601 | && htab->elf.dynsym->contents != NULL) | |
4602 | { | |
4603 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
4604 | dynamic symbols. */ | |
4605 | unsigned long r_symndx = htab->r_sym (rela->r_info); | |
897463b1 L |
4606 | if (r_symndx != STN_UNDEF) |
4607 | { | |
4608 | Elf_Internal_Sym sym; | |
4609 | if (!bed->s->swap_symbol_in (abfd, | |
4610 | (htab->elf.dynsym->contents | |
4611 | + r_symndx * bed->s->sizeof_sym), | |
4612 | 0, &sym)) | |
4613 | abort (); | |
d9e3b590 | 4614 | |
897463b1 L |
4615 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
4616 | return reloc_class_ifunc; | |
4617 | } | |
d9e3b590 | 4618 | } |
cae1fbbb | 4619 | |
351f65ca | 4620 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 | 4621 | { |
c428ce9d L |
4622 | case R_X86_64_IRELATIVE: |
4623 | return reloc_class_ifunc; | |
c434dee6 | 4624 | case R_X86_64_RELATIVE: |
1da80baa | 4625 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
4626 | return reloc_class_relative; |
4627 | case R_X86_64_JUMP_SLOT: | |
4628 | return reloc_class_plt; | |
4629 | case R_X86_64_COPY: | |
4630 | return reloc_class_copy; | |
4631 | default: | |
4632 | return reloc_class_normal; | |
4633 | } | |
4634 | } | |
4635 | ||
70256ad8 AJ |
4636 | /* Finish up the dynamic sections. */ |
4637 | ||
b34976b6 | 4638 | static bfd_boolean |
351f65ca L |
4639 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
4640 | struct bfd_link_info *info) | |
70256ad8 | 4641 | { |
0afcef53 | 4642 | struct elf_x86_link_hash_table *htab; |
70256ad8 AJ |
4643 | bfd *dynobj; |
4644 | asection *sdyn; | |
70256ad8 | 4645 | |
0afcef53 | 4646 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
4647 | if (htab == NULL) |
4648 | return FALSE; | |
4649 | ||
c434dee6 | 4650 | dynobj = htab->elf.dynobj; |
3d4d4302 | 4651 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
70256ad8 | 4652 | |
c434dee6 | 4653 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 4654 | { |
82e96e07 L |
4655 | bfd_byte *dyncon, *dynconend; |
4656 | const struct elf_backend_data *bed; | |
4657 | bfd_size_type sizeof_dyn; | |
70256ad8 | 4658 | |
6de2ae4a | 4659 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 4660 | abort (); |
70256ad8 | 4661 | |
82e96e07 L |
4662 | bed = get_elf_backend_data (dynobj); |
4663 | sizeof_dyn = bed->s->sizeof_dyn; | |
4664 | dyncon = sdyn->contents; | |
4665 | dynconend = sdyn->contents + sdyn->size; | |
4666 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
4667 | { |
4668 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
4669 | asection *s; |
4670 | ||
82e96e07 | 4671 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
4672 | |
4673 | switch (dyn.d_tag) | |
4674 | { | |
4675 | default: | |
053579d7 | 4676 | continue; |
70256ad8 AJ |
4677 | |
4678 | case DT_PLTGOT: | |
6de2ae4a | 4679 | s = htab->elf.sgotplt; |
8c37241b | 4680 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 4681 | break; |
70256ad8 AJ |
4682 | |
4683 | case DT_JMPREL: | |
6de2ae4a | 4684 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 4685 | break; |
70256ad8 | 4686 | |
c434dee6 | 4687 | case DT_PLTRELSZ: |
6de2ae4a | 4688 | s = htab->elf.srelplt->output_section; |
eea6121a | 4689 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
4690 | break; |
4691 | ||
67a4f2b7 | 4692 | case DT_TLSDESC_PLT: |
6de2ae4a | 4693 | s = htab->elf.splt; |
67a4f2b7 AO |
4694 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
4695 | + htab->tlsdesc_plt; | |
4696 | break; | |
4697 | ||
4698 | case DT_TLSDESC_GOT: | |
6de2ae4a | 4699 | s = htab->elf.sgot; |
67a4f2b7 AO |
4700 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
4701 | + htab->tlsdesc_got; | |
4702 | break; | |
70256ad8 | 4703 | } |
c434dee6 | 4704 | |
82e96e07 | 4705 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
4706 | } |
4707 | ||
6de2ae4a | 4708 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 4709 | { |
eed180f8 | 4710 | elf_section_data (htab->elf.splt->output_section) |
765e526c | 4711 | ->this_hdr.sh_entsize = htab->plt.plt_entry_size; |
67a4f2b7 | 4712 | |
765e526c | 4713 | if (htab->plt.has_plt0) |
67a4f2b7 | 4714 | { |
38b12349 L |
4715 | /* Fill in the special first entry in the procedure linkage |
4716 | table. */ | |
4717 | memcpy (htab->elf.splt->contents, | |
765e526c L |
4718 | htab->lazy_plt->plt0_entry, |
4719 | htab->lazy_plt->plt0_entry_size); | |
38b12349 L |
4720 | /* Add offset for pushq GOT+8(%rip), since the instruction |
4721 | uses 6 bytes subtract this value. */ | |
67a4f2b7 | 4722 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4723 | (htab->elf.sgotplt->output_section->vma |
4724 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 4725 | + 8 |
6de2ae4a L |
4726 | - htab->elf.splt->output_section->vma |
4727 | - htab->elf.splt->output_offset | |
67a4f2b7 | 4728 | - 6), |
38b12349 | 4729 | (htab->elf.splt->contents |
765e526c | 4730 | + htab->lazy_plt->plt0_got1_offset)); |
38b12349 L |
4731 | /* Add offset for the PC-relative instruction accessing |
4732 | GOT+16, subtracting the offset to the end of that | |
4733 | instruction. */ | |
67a4f2b7 | 4734 | bfd_put_32 (output_bfd, |
38b12349 L |
4735 | (htab->elf.sgotplt->output_section->vma |
4736 | + htab->elf.sgotplt->output_offset | |
4737 | + 16 | |
6de2ae4a L |
4738 | - htab->elf.splt->output_section->vma |
4739 | - htab->elf.splt->output_offset | |
765e526c | 4740 | - htab->lazy_plt->plt0_got2_insn_end), |
38b12349 | 4741 | (htab->elf.splt->contents |
765e526c | 4742 | + htab->lazy_plt->plt0_got2_offset)); |
38b12349 L |
4743 | |
4744 | if (htab->tlsdesc_plt) | |
4745 | { | |
4746 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
4747 | htab->elf.sgot->contents + htab->tlsdesc_got); | |
4748 | ||
4749 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, | |
765e526c L |
4750 | htab->lazy_plt->plt0_entry, |
4751 | htab->lazy_plt->plt0_entry_size); | |
38b12349 L |
4752 | |
4753 | /* Add offset for pushq GOT+8(%rip), since the | |
4754 | instruction uses 6 bytes subtract this value. */ | |
4755 | bfd_put_32 (output_bfd, | |
4756 | (htab->elf.sgotplt->output_section->vma | |
4757 | + htab->elf.sgotplt->output_offset | |
4758 | + 8 | |
4759 | - htab->elf.splt->output_section->vma | |
4760 | - htab->elf.splt->output_offset | |
4761 | - htab->tlsdesc_plt | |
4762 | - 6), | |
4763 | (htab->elf.splt->contents | |
4764 | + htab->tlsdesc_plt | |
765e526c | 4765 | + htab->lazy_plt->plt0_got1_offset)); |
38b12349 L |
4766 | /* Add offset for the PC-relative instruction accessing |
4767 | GOT+TDG, where TDG stands for htab->tlsdesc_got, | |
4768 | subtracting the offset to the end of that | |
4769 | instruction. */ | |
4770 | bfd_put_32 (output_bfd, | |
4771 | (htab->elf.sgot->output_section->vma | |
4772 | + htab->elf.sgot->output_offset | |
4773 | + htab->tlsdesc_got | |
4774 | - htab->elf.splt->output_section->vma | |
4775 | - htab->elf.splt->output_offset | |
4776 | - htab->tlsdesc_plt | |
765e526c | 4777 | - htab->lazy_plt->plt0_got2_insn_end), |
38b12349 L |
4778 | (htab->elf.splt->contents |
4779 | + htab->tlsdesc_plt | |
765e526c | 4780 | + htab->lazy_plt->plt0_got2_offset)); |
38b12349 | 4781 | } |
67a4f2b7 | 4782 | } |
70256ad8 | 4783 | } |
70256ad8 | 4784 | |
0afcef53 L |
4785 | if (htab->plt_got != NULL && htab->plt_got->size > 0) |
4786 | elf_section_data (htab->plt_got->output_section) | |
765e526c | 4787 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; |
38b12349 | 4788 | |
0afcef53 L |
4789 | if (htab->plt_second != NULL && htab->plt_second->size > 0) |
4790 | elf_section_data (htab->plt_second->output_section) | |
765e526c | 4791 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; |
0afcef53 | 4792 | } |
0ff2b86e | 4793 | |
38b12349 L |
4794 | /* GOT is always created in setup_gnu_properties. But it may not be |
4795 | needed. */ | |
4796 | if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0) | |
70256ad8 | 4797 | { |
56d4289c L |
4798 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
4799 | { | |
4eca0228 | 4800 | _bfd_error_handler |
56d4289c L |
4801 | (_("discarded output section: `%A'"), htab->elf.sgotplt); |
4802 | return FALSE; | |
4803 | } | |
4804 | ||
38b12349 L |
4805 | /* Set the first entry in the global offset table to the address of |
4806 | the dynamic section. */ | |
4807 | if (sdyn == NULL) | |
4808 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); | |
4809 | else | |
4810 | bfd_put_64 (output_bfd, | |
4811 | sdyn->output_section->vma + sdyn->output_offset, | |
4812 | htab->elf.sgotplt->contents); | |
4813 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ | |
4814 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
4815 | htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); | |
4816 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
4817 | htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
4818 | ||
4819 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize | |
4820 | = GOT_ENTRY_SIZE; | |
c434dee6 | 4821 | } |
70256ad8 | 4822 | |
e41b3a13 | 4823 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
4824 | if (htab->plt_eh_frame != NULL |
4825 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
4826 | { |
4827 | if (htab->elf.splt != NULL | |
4828 | && htab->elf.splt->size != 0 | |
4829 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
4830 | && htab->elf.splt->output_section != NULL | |
4831 | && htab->plt_eh_frame->output_section != NULL) | |
4832 | { | |
4833 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
4834 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
4835 | + htab->plt_eh_frame->output_offset | |
4836 | + PLT_FDE_START_OFFSET; | |
4837 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
4838 | htab->plt_eh_frame->contents | |
4839 | + PLT_FDE_START_OFFSET); | |
4840 | } | |
dbaa2011 | 4841 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
4842 | { |
4843 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
4844 | htab->plt_eh_frame, | |
4845 | htab->plt_eh_frame->contents)) | |
4846 | return FALSE; | |
4847 | } | |
4848 | } | |
4849 | ||
fff53dae L |
4850 | /* Adjust .eh_frame for .plt.got section. */ |
4851 | if (htab->plt_got_eh_frame != NULL | |
4852 | && htab->plt_got_eh_frame->contents != NULL) | |
4853 | { | |
4854 | if (htab->plt_got != NULL | |
4855 | && htab->plt_got->size != 0 | |
4856 | && (htab->plt_got->flags & SEC_EXCLUDE) == 0 | |
4857 | && htab->plt_got->output_section != NULL | |
4858 | && htab->plt_got_eh_frame->output_section != NULL) | |
4859 | { | |
4860 | bfd_vma plt_start = htab->plt_got->output_section->vma; | |
4861 | bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma | |
4862 | + htab->plt_got_eh_frame->output_offset | |
4863 | + PLT_FDE_START_OFFSET; | |
4864 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
4865 | htab->plt_got_eh_frame->contents | |
4866 | + PLT_FDE_START_OFFSET); | |
4867 | } | |
4868 | if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
4869 | { | |
4870 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
4871 | htab->plt_got_eh_frame, | |
4872 | htab->plt_got_eh_frame->contents)) | |
4873 | return FALSE; | |
4874 | } | |
4875 | } | |
4876 | ||
f2c29a16 L |
4877 | /* Adjust .eh_frame for the second PLT section. */ |
4878 | if (htab->plt_second_eh_frame != NULL | |
4879 | && htab->plt_second_eh_frame->contents != NULL) | |
8361ed4d | 4880 | { |
f2c29a16 L |
4881 | if (htab->plt_second != NULL |
4882 | && htab->plt_second->size != 0 | |
4883 | && (htab->plt_second->flags & SEC_EXCLUDE) == 0 | |
4884 | && htab->plt_second->output_section != NULL | |
4885 | && htab->plt_second_eh_frame->output_section != NULL) | |
8361ed4d | 4886 | { |
f2c29a16 L |
4887 | bfd_vma plt_start = htab->plt_second->output_section->vma; |
4888 | bfd_vma eh_frame_start | |
4889 | = (htab->plt_second_eh_frame->output_section->vma | |
4890 | + htab->plt_second_eh_frame->output_offset | |
4891 | + PLT_FDE_START_OFFSET); | |
8361ed4d | 4892 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, |
f2c29a16 | 4893 | htab->plt_second_eh_frame->contents |
8361ed4d L |
4894 | + PLT_FDE_START_OFFSET); |
4895 | } | |
f2c29a16 L |
4896 | if (htab->plt_second_eh_frame->sec_info_type |
4897 | == SEC_INFO_TYPE_EH_FRAME) | |
8361ed4d L |
4898 | { |
4899 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
f2c29a16 L |
4900 | htab->plt_second_eh_frame, |
4901 | htab->plt_second_eh_frame->contents)) | |
8361ed4d L |
4902 | return FALSE; |
4903 | } | |
4904 | } | |
4905 | ||
6de2ae4a L |
4906 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
4907 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
4908 | = GOT_ENTRY_SIZE; |
4909 | ||
aec6b87e L |
4910 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
4911 | if (bfd_link_pie (info)) | |
4912 | bfd_hash_traverse (&info->hash->table, | |
4913 | elf_x86_64_pie_finish_undefweak_symbol, | |
4914 | info); | |
4915 | ||
b34976b6 | 4916 | return TRUE; |
8d88c4ca NC |
4917 | } |
4918 | ||
233cc9c1 L |
4919 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
4920 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
4921 | It has to be done before elf_link_sort_relocs is called so that | |
4922 | dynamic relocations are properly sorted. */ | |
4923 | ||
4924 | static bfd_boolean | |
4925 | elf_x86_64_output_arch_local_syms | |
4926 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
4927 | struct bfd_link_info *info, | |
4928 | void *flaginfo ATTRIBUTE_UNUSED, | |
4929 | int (*func) (void *, const char *, | |
4930 | Elf_Internal_Sym *, | |
4931 | asection *, | |
4932 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
4933 | { | |
0afcef53 L |
4934 | struct elf_x86_link_hash_table *htab |
4935 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
233cc9c1 L |
4936 | if (htab == NULL) |
4937 | return FALSE; | |
4938 | ||
4939 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
4940 | htab_traverse (htab->loc_hash_table, | |
4941 | elf_x86_64_finish_local_dynamic_symbol, | |
4942 | info); | |
4943 | ||
4944 | return TRUE; | |
4945 | } | |
4946 | ||
38b12349 | 4947 | /* Forward declaration. */ |
765e526c | 4948 | static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt; |
38b12349 L |
4949 | |
4950 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all | |
4951 | dynamic relocations. */ | |
4952 | ||
4953 | static long | |
4954 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
4955 | long symcount ATTRIBUTE_UNUSED, | |
4956 | asymbol **syms ATTRIBUTE_UNUSED, | |
4957 | long dynsymcount, | |
4958 | asymbol **dynsyms, | |
4959 | asymbol **ret) | |
4960 | { | |
f493882d | 4961 | long count, i, n; |
38b12349 | 4962 | int j; |
38b12349 | 4963 | bfd_byte *plt_contents; |
f493882d | 4964 | long relsize; |
765e526c L |
4965 | const struct elf_x86_lazy_plt_layout *lazy_plt; |
4966 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
4967 | const struct elf_x86_lazy_plt_layout *lazy_bnd_plt; | |
4968 | const struct elf_x86_non_lazy_plt_layout *non_lazy_bnd_plt; | |
4969 | const struct elf_x86_lazy_plt_layout *lazy_ibt_plt; | |
4970 | const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt; | |
38b12349 | 4971 | asection *plt; |
f493882d L |
4972 | enum elf_x86_plt_type plt_type; |
4973 | struct elf_x86_plt plts[] = | |
144bed8d | 4974 | { |
38b12349 L |
4975 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
4976 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
f2c29a16 L |
4977 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, |
4978 | { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
dd9e66ee | 4979 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } |
38b12349 | 4980 | }; |
144bed8d | 4981 | |
38b12349 | 4982 | *ret = NULL; |
144bed8d | 4983 | |
38b12349 L |
4984 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
4985 | return 0; | |
144bed8d | 4986 | |
38b12349 L |
4987 | if (dynsymcount <= 0) |
4988 | return 0; | |
cca5b8b6 | 4989 | |
38b12349 L |
4990 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
4991 | if (relsize <= 0) | |
4992 | return -1; | |
4993 | ||
38b12349 | 4994 | if (get_elf_x86_64_backend_data (abfd)->os == is_normal) |
144bed8d | 4995 | { |
38b12349 L |
4996 | lazy_plt = &elf_x86_64_lazy_plt; |
4997 | non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
4998 | lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt; | |
4999 | non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt; | |
ee2fdd6f L |
5000 | if (ABI_64_P (abfd)) |
5001 | { | |
5002 | lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; | |
5003 | non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
5004 | } | |
5005 | else | |
5006 | { | |
5007 | lazy_ibt_plt = &elf_x32_lazy_ibt_plt; | |
5008 | non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
5009 | } | |
38b12349 L |
5010 | } |
5011 | else | |
5012 | { | |
5013 | lazy_plt = &elf_x86_64_nacl_plt; | |
5014 | non_lazy_plt = NULL; | |
5015 | lazy_bnd_plt = NULL; | |
5016 | non_lazy_bnd_plt = NULL; | |
ee2fdd6f L |
5017 | lazy_ibt_plt = NULL; |
5018 | non_lazy_ibt_plt = NULL; | |
38b12349 | 5019 | } |
144bed8d | 5020 | |
38b12349 L |
5021 | count = 0; |
5022 | for (j = 0; plts[j].name != NULL; j++) | |
5023 | { | |
5024 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
90efb642 | 5025 | if (plt == NULL || plt->size == 0) |
6f25f223 | 5026 | continue; |
533d0af0 | 5027 | |
38b12349 L |
5028 | /* Get the PLT section contents. */ |
5029 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
5030 | if (plt_contents == NULL) | |
5031 | break; | |
5032 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
5033 | plt_contents, 0, plt->size)) | |
5034 | { | |
5035 | free (plt_contents); | |
5036 | break; | |
5037 | } | |
144bed8d | 5038 | |
38b12349 L |
5039 | /* Check what kind of PLT it is. */ |
5040 | plt_type = plt_unknown; | |
90efb642 L |
5041 | if (plts[j].type == plt_unknown |
5042 | && (plt->size >= (lazy_plt->plt_entry_size | |
5043 | + lazy_plt->plt_entry_size))) | |
144bed8d | 5044 | { |
38b12349 L |
5045 | /* Match lazy PLT first. Need to check the first two |
5046 | instructions. */ | |
5047 | if ((memcmp (plt_contents, lazy_plt->plt0_entry, | |
5048 | lazy_plt->plt0_got1_offset) == 0) | |
5049 | && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6, | |
5050 | 2) == 0)) | |
5051 | plt_type = plt_lazy; | |
5052 | else if (lazy_bnd_plt != NULL | |
5053 | && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry, | |
5054 | lazy_bnd_plt->plt0_got1_offset) == 0) | |
5055 | && (memcmp (plt_contents + 6, | |
5056 | lazy_bnd_plt->plt0_entry + 6, 3) == 0)) | |
ec1f73bb | 5057 | { |
f2c29a16 | 5058 | plt_type = plt_lazy | plt_second; |
ee2fdd6f L |
5059 | /* The fist entry in the lazy IBT PLT is the same as the |
5060 | lazy BND PLT. */ | |
5061 | if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size, | |
5062 | lazy_ibt_plt->plt_entry, | |
5063 | lazy_ibt_plt->plt_got_offset) == 0)) | |
5064 | lazy_plt = lazy_ibt_plt; | |
5065 | else | |
5066 | lazy_plt = lazy_bnd_plt; | |
ec1f73bb | 5067 | } |
144bed8d | 5068 | } |
fca6ae69 | 5069 | |
38b12349 | 5070 | if (non_lazy_plt != NULL |
90efb642 L |
5071 | && (plt_type == plt_unknown || plt_type == plt_non_lazy) |
5072 | && plt->size >= non_lazy_plt->plt_entry_size) | |
38b12349 L |
5073 | { |
5074 | /* Match non-lazy PLT. */ | |
5075 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
5076 | non_lazy_plt->plt_got_offset) == 0) | |
5077 | plt_type = plt_non_lazy; | |
5078 | } | |
5079 | ||
ee2fdd6f | 5080 | if (plt_type == plt_unknown || plt_type == plt_second) |
38b12349 | 5081 | { |
ee2fdd6f | 5082 | if (non_lazy_bnd_plt != NULL |
90efb642 | 5083 | && plt->size >= non_lazy_bnd_plt->plt_entry_size |
ee2fdd6f L |
5084 | && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry, |
5085 | non_lazy_bnd_plt->plt_got_offset) == 0)) | |
38b12349 | 5086 | { |
ee2fdd6f | 5087 | /* Match BND PLT. */ |
f2c29a16 | 5088 | plt_type = plt_second; |
38b12349 L |
5089 | non_lazy_plt = non_lazy_bnd_plt; |
5090 | } | |
ee2fdd6f | 5091 | else if (non_lazy_ibt_plt != NULL |
90efb642 | 5092 | && plt->size >= non_lazy_ibt_plt->plt_entry_size |
ee2fdd6f L |
5093 | && (memcmp (plt_contents, |
5094 | non_lazy_ibt_plt->plt_entry, | |
5095 | non_lazy_ibt_plt->plt_got_offset) == 0)) | |
5096 | { | |
5097 | /* Match IBT PLT. */ | |
5098 | plt_type = plt_second; | |
5099 | non_lazy_plt = non_lazy_ibt_plt; | |
5100 | } | |
38b12349 L |
5101 | } |
5102 | ||
5103 | if (plt_type == plt_unknown) | |
37c0b6ee L |
5104 | { |
5105 | free (plt_contents); | |
5106 | continue; | |
5107 | } | |
38b12349 L |
5108 | |
5109 | plts[j].sec = plt; | |
5110 | plts[j].type = plt_type; | |
5111 | ||
5112 | if ((plt_type & plt_lazy)) | |
5113 | { | |
5114 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
5115 | plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size; | |
5116 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
5117 | /* Skip PLT0 in lazy PLT. */ | |
5118 | i = 1; | |
5119 | } | |
5120 | else | |
5121 | { | |
5122 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
5123 | plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size; | |
5124 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
5125 | i = 0; | |
5126 | } | |
5127 | ||
f2c29a16 L |
5128 | /* Skip lazy PLT when the second PLT is used. */ |
5129 | if (plt_type == (plt_lazy | plt_second)) | |
38b12349 L |
5130 | plts[j].count = 0; |
5131 | else | |
5132 | { | |
5133 | n = plt->size / plts[j].plt_entry_size; | |
5134 | plts[j].count = n; | |
5135 | count += n - i; | |
5136 | } | |
5137 | ||
5138 | plts[j].contents = plt_contents; | |
144bed8d L |
5139 | } |
5140 | ||
f493882d L |
5141 | return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize, |
5142 | (bfd_vma) 0, plts, dynsyms, | |
5143 | ret); | |
0ff2b86e L |
5144 | } |
5145 | ||
d2b2c203 DJ |
5146 | /* Handle an x86-64 specific section when reading an object file. This |
5147 | is called when elfcode.h finds a section with an unknown type. */ | |
5148 | ||
5149 | static bfd_boolean | |
0c723101 L |
5150 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
5151 | const char *name, int shindex) | |
d2b2c203 DJ |
5152 | { |
5153 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
5154 | return FALSE; | |
5155 | ||
6dc132d9 | 5156 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
5157 | return FALSE; |
5158 | ||
5159 | return TRUE; | |
5160 | } | |
5161 | ||
3b22753a L |
5162 | /* Hook called by the linker routine which adds symbols from an object |
5163 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
5164 | of .bss. */ | |
5165 | ||
5166 | static bfd_boolean | |
351f65ca | 5167 | elf_x86_64_add_symbol_hook (bfd *abfd, |
a43942db | 5168 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
351f65ca L |
5169 | Elf_Internal_Sym *sym, |
5170 | const char **namep ATTRIBUTE_UNUSED, | |
5171 | flagword *flagsp ATTRIBUTE_UNUSED, | |
5172 | asection **secp, | |
5173 | bfd_vma *valp) | |
3b22753a L |
5174 | { |
5175 | asection *lcomm; | |
5176 | ||
5177 | switch (sym->st_shndx) | |
5178 | { | |
5179 | case SHN_X86_64_LCOMMON: | |
5180 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
5181 | if (lcomm == NULL) | |
5182 | { | |
5183 | lcomm = bfd_make_section_with_flags (abfd, | |
5184 | "LARGE_COMMON", | |
5185 | (SEC_ALLOC | |
5186 | | SEC_IS_COMMON | |
5187 | | SEC_LINKER_CREATED)); | |
5188 | if (lcomm == NULL) | |
5189 | return FALSE; | |
5190 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
5191 | } | |
5192 | *secp = lcomm; | |
5193 | *valp = sym->st_size; | |
c35bdf6e | 5194 | return TRUE; |
3b22753a | 5195 | } |
d8045f23 | 5196 | |
3b22753a L |
5197 | return TRUE; |
5198 | } | |
5199 | ||
5200 | ||
5201 | /* Given a BFD section, try to locate the corresponding ELF section | |
5202 | index. */ | |
5203 | ||
5204 | static bfd_boolean | |
351f65ca L |
5205 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
5206 | asection *sec, int *index_return) | |
3b22753a L |
5207 | { |
5208 | if (sec == &_bfd_elf_large_com_section) | |
5209 | { | |
91d6fa6a | 5210 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
5211 | return TRUE; |
5212 | } | |
5213 | return FALSE; | |
5214 | } | |
5215 | ||
5216 | /* Process a symbol. */ | |
5217 | ||
5218 | static void | |
351f65ca L |
5219 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
5220 | asymbol *asym) | |
3b22753a L |
5221 | { |
5222 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
5223 | ||
5224 | switch (elfsym->internal_elf_sym.st_shndx) | |
5225 | { | |
5226 | case SHN_X86_64_LCOMMON: | |
5227 | asym->section = &_bfd_elf_large_com_section; | |
5228 | asym->value = elfsym->internal_elf_sym.st_size; | |
5229 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
5230 | asym->flags &= ~BSF_GLOBAL; | |
5231 | break; | |
5232 | } | |
5233 | } | |
5234 | ||
5235 | static bfd_boolean | |
351f65ca | 5236 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
5237 | { |
5238 | return (sym->st_shndx == SHN_COMMON | |
5239 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
5240 | } | |
5241 | ||
5242 | static unsigned int | |
351f65ca | 5243 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
5244 | { |
5245 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
5246 | return SHN_COMMON; | |
5247 | else | |
5248 | return SHN_X86_64_LCOMMON; | |
5249 | } | |
5250 | ||
5251 | static asection * | |
351f65ca | 5252 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
5253 | { |
5254 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
5255 | return bfd_com_section_ptr; | |
5256 | else | |
5257 | return &_bfd_elf_large_com_section; | |
5258 | } | |
5259 | ||
5260 | static bfd_boolean | |
5d13b3b3 AM |
5261 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
5262 | const Elf_Internal_Sym *sym, | |
351f65ca | 5263 | asection **psec, |
5d13b3b3 AM |
5264 | bfd_boolean newdef, |
5265 | bfd_boolean olddef, | |
351f65ca | 5266 | bfd *oldbfd, |
5d13b3b3 | 5267 | const asection *oldsec) |
3b22753a L |
5268 | { |
5269 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
5270 | normal common symbol. We turn the large common symbol into a |
5271 | normal one. */ | |
5d13b3b3 | 5272 | if (!olddef |
3b22753a | 5273 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
5274 | && !newdef |
5275 | && bfd_is_com_section (*psec) | |
5276 | && oldsec != *psec) | |
3b22753a | 5277 | { |
00492999 | 5278 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 5279 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
5280 | { |
5281 | h->root.u.c.p->section | |
5282 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
5283 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
5284 | } | |
5285 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
5286 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
5287 | *psec = bfd_com_section_ptr; | |
3b22753a L |
5288 | } |
5289 | ||
5290 | return TRUE; | |
5291 | } | |
5292 | ||
5293 | static int | |
351f65ca L |
5294 | elf_x86_64_additional_program_headers (bfd *abfd, |
5295 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
5296 | { |
5297 | asection *s; | |
9a2e389a | 5298 | int count = 0; |
3b22753a L |
5299 | |
5300 | /* Check to see if we need a large readonly segment. */ | |
5301 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
5302 | if (s && (s->flags & SEC_LOAD)) | |
5303 | count++; | |
5304 | ||
5305 | /* Check to see if we need a large data segment. Since .lbss sections | |
5306 | is placed right after the .bss section, there should be no need for | |
5307 | a large data segment just because of .lbss. */ | |
5308 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
5309 | if (s && (s->flags & SEC_LOAD)) | |
5310 | count++; | |
5311 | ||
5312 | return count; | |
5313 | } | |
5314 | ||
c543bf9a L |
5315 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
5316 | ||
5317 | static bfd_boolean | |
5318 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
5319 | const bfd_target *output) | |
5320 | { | |
5321 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
5322 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
5323 | && _bfd_elf_relocs_compatible (input, output)); | |
5324 | } | |
5325 | ||
38b12349 L |
5326 | /* Set up x86-64 GNU properties. Return the first relocatable ELF input |
5327 | with GNU properties if found. Otherwise, return NULL. */ | |
5328 | ||
5329 | static bfd * | |
5330 | elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info) | |
5331 | { | |
a6798bab | 5332 | struct elf_x86_plt_layout_table plt_layout; |
ee2fdd6f | 5333 | |
a6798bab L |
5334 | plt_layout.is_vxworks = FALSE; |
5335 | if (get_elf_x86_64_backend_data (info->output_bfd)->os == is_normal) | |
73784fa5 | 5336 | { |
a6798bab | 5337 | if (info->bndplt) |
ee2fdd6f | 5338 | { |
a6798bab L |
5339 | plt_layout.lazy_plt = &elf_x86_64_lazy_bnd_plt; |
5340 | plt_layout.non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt; | |
ee2fdd6f L |
5341 | } |
5342 | else | |
5343 | { | |
a6798bab L |
5344 | plt_layout.lazy_plt = &elf_x86_64_lazy_plt; |
5345 | plt_layout.non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
ee2fdd6f | 5346 | } |
38b12349 | 5347 | |
a6798bab | 5348 | if (ABI_64_P (info->output_bfd)) |
38b12349 | 5349 | { |
a6798bab L |
5350 | plt_layout.lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; |
5351 | plt_layout.non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
38b12349 L |
5352 | } |
5353 | else | |
5354 | { | |
a6798bab L |
5355 | plt_layout.lazy_ibt_plt = &elf_x32_lazy_ibt_plt; |
5356 | plt_layout.non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
38b12349 | 5357 | } |
a6798bab | 5358 | plt_layout.normal_target = TRUE; |
38b12349 L |
5359 | } |
5360 | else | |
5361 | { | |
a6798bab L |
5362 | plt_layout.lazy_plt = &elf_x86_64_nacl_plt; |
5363 | plt_layout.non_lazy_plt = NULL; | |
5364 | plt_layout.lazy_ibt_plt = NULL; | |
5365 | plt_layout.non_lazy_ibt_plt = NULL; | |
5366 | plt_layout.normal_target = FALSE; | |
38b12349 L |
5367 | } |
5368 | ||
a6798bab | 5369 | return _bfd_x86_elf_link_setup_gnu_properties (info, &plt_layout); |
38b12349 L |
5370 | } |
5371 | ||
9a2e389a | 5372 | static const struct bfd_elf_special_section |
46bed679 | 5373 | elf_x86_64_special_sections[]= |
3b22753a | 5374 | { |
0112cd26 NC |
5375 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
5376 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
5377 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
5378 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
5379 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
5380 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
5381 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
5382 | }; |
5383 | ||
6d00b590 | 5384 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
5385 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
5386 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 5387 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 5388 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 5389 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 5390 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 5391 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
5392 | |
5393 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 5394 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
5395 | #define elf_backend_want_got_plt 1 |
5396 | #define elf_backend_plt_readonly 1 | |
5397 | #define elf_backend_want_plt_sym 0 | |
5398 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 5399 | #define elf_backend_rela_normal 1 |
e41b3a13 | 5400 | #define elf_backend_plt_alignment 4 |
f7483970 | 5401 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 5402 | #define elf_backend_caches_rawsize 1 |
64f52338 | 5403 | #define elf_backend_dtrel_excludes_plt 1 |
5474d94f | 5404 | #define elf_backend_want_dynrelro 1 |
70256ad8 | 5405 | |
351f65ca | 5406 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 5407 | |
351f65ca | 5408 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 5409 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 5410 | elf_x86_64_reloc_name_lookup |
70256ad8 | 5411 | |
c543bf9a | 5412 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca | 5413 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
38b12349 | 5414 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
351f65ca L |
5415 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections |
5416 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
233cc9c1 | 5417 | #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms |
351f65ca L |
5418 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus |
5419 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
5420 | #ifdef CORE_HEADER |
5421 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
5422 | #endif | |
351f65ca L |
5423 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
5424 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
74541ad4 | 5425 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 5426 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
0ff2b86e | 5427 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 5428 | |
d2b2c203 | 5429 | #define elf_backend_section_from_shdr \ |
351f65ca | 5430 | elf_x86_64_section_from_shdr |
d2b2c203 | 5431 | |
3b22753a | 5432 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 5433 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 5434 | #define elf_backend_add_symbol_hook \ |
351f65ca | 5435 | elf_x86_64_add_symbol_hook |
3b22753a | 5436 | #define elf_backend_symbol_processing \ |
351f65ca | 5437 | elf_x86_64_symbol_processing |
3b22753a | 5438 | #define elf_backend_common_section_index \ |
351f65ca | 5439 | elf_x86_64_common_section_index |
3b22753a | 5440 | #define elf_backend_common_section \ |
351f65ca | 5441 | elf_x86_64_common_section |
3b22753a | 5442 | #define elf_backend_common_definition \ |
351f65ca | 5443 | elf_x86_64_common_definition |
3b22753a | 5444 | #define elf_backend_merge_symbol \ |
351f65ca | 5445 | elf_x86_64_merge_symbol |
3b22753a | 5446 | #define elf_backend_special_sections \ |
351f65ca | 5447 | elf_x86_64_special_sections |
3b22753a | 5448 | #define elf_backend_additional_program_headers \ |
351f65ca | 5449 | elf_x86_64_additional_program_headers |
38b12349 L |
5450 | #define elf_backend_setup_gnu_properties \ |
5451 | elf_x86_64_link_setup_gnu_properties | |
3b22753a | 5452 | |
8d88c4ca | 5453 | #include "elf64-target.h" |
9d7cbccd | 5454 | |
6036f486 ES |
5455 | /* CloudABI support. */ |
5456 | ||
5457 | #undef TARGET_LITTLE_SYM | |
5458 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec | |
5459 | #undef TARGET_LITTLE_NAME | |
5460 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" | |
5461 | ||
5462 | #undef ELF_OSABI | |
5463 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
5464 | ||
5465 | #undef elf64_bed | |
5466 | #define elf64_bed elf64_x86_64_cloudabi_bed | |
5467 | ||
5468 | #include "elf64-target.h" | |
5469 | ||
9d7cbccd NC |
5470 | /* FreeBSD support. */ |
5471 | ||
5472 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5473 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
9d7cbccd NC |
5474 | #undef TARGET_LITTLE_NAME |
5475 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
5476 | ||
d1036acb L |
5477 | #undef ELF_OSABI |
5478 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 5479 | |
9d7cbccd NC |
5480 | #undef elf64_bed |
5481 | #define elf64_bed elf64_x86_64_fbsd_bed | |
5482 | ||
5483 | #include "elf64-target.h" | |
8a9036a4 | 5484 | |
a6cc6b3b RO |
5485 | /* Solaris 2 support. */ |
5486 | ||
5487 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5488 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
5489 | #undef TARGET_LITTLE_NAME |
5490 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
5491 | ||
5492 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
5493 | objects won't be recognized. */ | |
5494 | #undef ELF_OSABI | |
5495 | ||
5496 | #undef elf64_bed | |
5497 | #define elf64_bed elf64_x86_64_sol2_bed | |
5498 | ||
7dc98aea RO |
5499 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
5500 | boundary. */ | |
84865015 | 5501 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
5502 | #define elf_backend_static_tls_alignment 16 |
5503 | ||
a6cc6b3b RO |
5504 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
5505 | ||
5506 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
5507 | File, p.63. */ | |
84865015 | 5508 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
5509 | #define elf_backend_want_plt_sym 1 |
5510 | ||
84865015 NC |
5511 | #undef elf_backend_strtab_flags |
5512 | #define elf_backend_strtab_flags SHF_STRINGS | |
5513 | ||
5514 | static bfd_boolean | |
5522f910 NC |
5515 | elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
5516 | bfd *obfd ATTRIBUTE_UNUSED, | |
5517 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
5518 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
5519 | { |
5520 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
5521 | and sh_link fields of Solaris specific section types. */ | |
5522 | return FALSE; | |
5523 | } | |
5524 | ||
5522f910 NC |
5525 | #undef elf_backend_copy_special_section_fields |
5526 | #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields | |
84865015 | 5527 | |
a6cc6b3b RO |
5528 | #include "elf64-target.h" |
5529 | ||
8059fb19 RM |
5530 | /* Native Client support. */ |
5531 | ||
64b384e1 RM |
5532 | static bfd_boolean |
5533 | elf64_x86_64_nacl_elf_object_p (bfd *abfd) | |
5534 | { | |
5535 | /* Set the right machine number for a NaCl x86-64 ELF64 file. */ | |
5536 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl); | |
5537 | return TRUE; | |
5538 | } | |
5539 | ||
8059fb19 | 5540 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5541 | #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec |
8059fb19 RM |
5542 | #undef TARGET_LITTLE_NAME |
5543 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
5544 | #undef elf64_bed | |
5545 | #define elf64_bed elf64_x86_64_nacl_bed | |
5546 | ||
5547 | #undef ELF_MAXPAGESIZE | |
5548 | #undef ELF_MINPAGESIZE | |
5549 | #undef ELF_COMMONPAGESIZE | |
5550 | #define ELF_MAXPAGESIZE 0x10000 | |
5551 | #define ELF_MINPAGESIZE 0x10000 | |
5552 | #define ELF_COMMONPAGESIZE 0x10000 | |
5553 | ||
5554 | /* Restore defaults. */ | |
5555 | #undef ELF_OSABI | |
5556 | #undef elf_backend_static_tls_alignment | |
5557 | #undef elf_backend_want_plt_sym | |
5558 | #define elf_backend_want_plt_sym 0 | |
84865015 | 5559 | #undef elf_backend_strtab_flags |
5522f910 | 5560 | #undef elf_backend_copy_special_section_fields |
8059fb19 RM |
5561 | |
5562 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
5563 | ||
5564 | #undef elf_backend_plt_alignment | |
5565 | #define elf_backend_plt_alignment 5 | |
5566 | #define NACL_PLT_ENTRY_SIZE 64 | |
5567 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
5568 | ||
5569 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
5570 | { | |
5571 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
5572 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ | |
5573 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
5574 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5575 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
5576 | ||
ea2d813e | 5577 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
70cc877f | 5578 | 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */ |
ea2d813e RM |
5579 | |
5580 | /* 32 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 5581 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 5582 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 5583 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 5584 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 5585 | 0x66, /* excess data16 prefix */ |
ea2d813e | 5586 | 0x90 /* nop */ |
8059fb19 RM |
5587 | }; |
5588 | ||
5589 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
5590 | { | |
5591 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
5592 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
5593 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5594 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
5595 | ||
5596 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
3ddf1bdd | 5597 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
5598 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
5599 | ||
5600 | /* Lazy GOT entries point here (32-byte aligned). */ | |
5601 | 0x68, /* pushq immediate */ | |
5602 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
5603 | 0xe9, /* jmp relative */ | |
5604 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
5605 | ||
5606 | /* 22 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 5607 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
5608 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
5609 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ | |
5610 | }; | |
5611 | ||
5612 | /* .eh_frame covering the .plt section. */ | |
5613 | ||
5614 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
5615 | { | |
5616 | #if (PLT_CIE_LENGTH != 20 \ | |
5617 | || PLT_FDE_LENGTH != 36 \ | |
5618 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
5619 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
5620 | # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!" | |
5621 | #endif | |
5622 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
5623 | 0, 0, 0, 0, /* CIE ID */ | |
5624 | 1, /* CIE version */ | |
5625 | 'z', 'R', 0, /* Augmentation string */ | |
5626 | 1, /* Code alignment factor */ | |
5627 | 0x78, /* Data alignment factor */ | |
5628 | 16, /* Return address column */ | |
5629 | 1, /* Augmentation size */ | |
5630 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
5631 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
5632 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
5633 | DW_CFA_nop, DW_CFA_nop, | |
5634 | ||
5635 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
5636 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
5637 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
5638 | 0, 0, 0, 0, /* .plt size goes here */ | |
5639 | 0, /* Augmentation size */ | |
5640 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
5641 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
5642 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
5643 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
5644 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
5645 | 13, /* Block length */ | |
5646 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
5647 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
5648 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
5649 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
5650 | DW_CFA_nop, DW_CFA_nop | |
5651 | }; | |
5652 | ||
765e526c | 5653 | static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt = |
8059fb19 RM |
5654 | { |
5655 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ | |
765e526c | 5656 | NACL_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
8059fb19 RM |
5657 | elf_x86_64_nacl_plt_entry, /* plt_entry */ |
5658 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
5659 | 2, /* plt0_got1_offset */ | |
5660 | 9, /* plt0_got2_offset */ | |
5661 | 13, /* plt0_got2_insn_end */ | |
5662 | 3, /* plt_got_offset */ | |
5663 | 33, /* plt_reloc_offset */ | |
5664 | 38, /* plt_plt_offset */ | |
5665 | 7, /* plt_got_insn_size */ | |
5666 | 42, /* plt_plt_insn_end */ | |
5667 | 32, /* plt_lazy_offset */ | |
a6798bab L |
5668 | elf_x86_64_nacl_plt0_entry, /* pic_plt0_entry */ |
5669 | elf_x86_64_nacl_plt_entry, /* pic_plt_entry */ | |
8059fb19 | 5670 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ |
38b12349 L |
5671 | sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */ |
5672 | }; | |
5673 | ||
5674 | static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed = | |
5675 | { | |
5676 | is_nacl /* os */ | |
8059fb19 RM |
5677 | }; |
5678 | ||
5679 | #undef elf_backend_arch_data | |
5680 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
5681 | ||
64b384e1 RM |
5682 | #undef elf_backend_object_p |
5683 | #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p | |
5a68afcf RM |
5684 | #undef elf_backend_modify_segment_map |
5685 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
5686 | #undef elf_backend_modify_program_headers | |
5687 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
5688 | #undef elf_backend_final_write_processing |
5689 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 5690 | |
8059fb19 RM |
5691 | #include "elf64-target.h" |
5692 | ||
5693 | /* Native Client x32 support. */ | |
5694 | ||
64b384e1 RM |
5695 | static bfd_boolean |
5696 | elf32_x86_64_nacl_elf_object_p (bfd *abfd) | |
5697 | { | |
5698 | /* Set the right machine number for a NaCl x86-64 ELF32 file. */ | |
5699 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl); | |
5700 | return TRUE; | |
5701 | } | |
5702 | ||
8059fb19 | 5703 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5704 | #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec |
8059fb19 RM |
5705 | #undef TARGET_LITTLE_NAME |
5706 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" | |
5707 | #undef elf32_bed | |
5708 | #define elf32_bed elf32_x86_64_nacl_bed | |
5709 | ||
8059fb19 RM |
5710 | #define bfd_elf32_bfd_reloc_type_lookup \ |
5711 | elf_x86_64_reloc_type_lookup | |
5712 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
5713 | elf_x86_64_reloc_name_lookup | |
b7365e5d L |
5714 | #define bfd_elf32_get_synthetic_symtab \ |
5715 | elf_x86_64_get_synthetic_symtab | |
8059fb19 RM |
5716 | |
5717 | #undef elf_backend_object_p | |
5718 | #define elf_backend_object_p \ | |
64b384e1 | 5719 | elf32_x86_64_nacl_elf_object_p |
8059fb19 RM |
5720 | |
5721 | #undef elf_backend_bfd_from_remote_memory | |
5722 | #define elf_backend_bfd_from_remote_memory \ | |
5723 | _bfd_elf32_bfd_from_remote_memory | |
5724 | ||
5725 | #undef elf_backend_size_info | |
5726 | #define elf_backend_size_info \ | |
5727 | _bfd_elf32_size_info | |
5728 | ||
5729 | #include "elf32-target.h" | |
5730 | ||
5731 | /* Restore defaults. */ | |
5a68afcf | 5732 | #undef elf_backend_object_p |
8059fb19 | 5733 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
5734 | #undef elf_backend_bfd_from_remote_memory |
5735 | #undef elf_backend_size_info | |
5736 | #undef elf_backend_modify_segment_map | |
5737 | #undef elf_backend_modify_program_headers | |
887badb3 | 5738 | #undef elf_backend_final_write_processing |
8059fb19 | 5739 | |
8a9036a4 L |
5740 | /* Intel L1OM support. */ |
5741 | ||
5742 | static bfd_boolean | |
5743 | elf64_l1om_elf_object_p (bfd *abfd) | |
5744 | { | |
5745 | /* Set the right machine number for an L1OM elf64 file. */ | |
5746 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
5747 | return TRUE; | |
5748 | } | |
5749 | ||
5750 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5751 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
5752 | #undef TARGET_LITTLE_NAME |
5753 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
5754 | #undef ELF_ARCH | |
5755 | #define ELF_ARCH bfd_arch_l1om | |
5756 | ||
5757 | #undef ELF_MACHINE_CODE | |
5758 | #define ELF_MACHINE_CODE EM_L1OM | |
5759 | ||
5760 | #undef ELF_OSABI | |
5761 | ||
5762 | #undef elf64_bed | |
5763 | #define elf64_bed elf64_l1om_bed | |
5764 | ||
5765 | #undef elf_backend_object_p | |
5766 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
5767 | ||
8059fb19 RM |
5768 | /* Restore defaults. */ |
5769 | #undef ELF_MAXPAGESIZE | |
5770 | #undef ELF_MINPAGESIZE | |
5771 | #undef ELF_COMMONPAGESIZE | |
5772 | #define ELF_MAXPAGESIZE 0x200000 | |
5773 | #define ELF_MINPAGESIZE 0x1000 | |
5774 | #define ELF_COMMONPAGESIZE 0x1000 | |
5775 | #undef elf_backend_plt_alignment | |
5776 | #define elf_backend_plt_alignment 4 | |
5777 | #undef elf_backend_arch_data | |
5778 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 5779 | |
8a9036a4 L |
5780 | #include "elf64-target.h" |
5781 | ||
5782 | /* FreeBSD L1OM support. */ | |
5783 | ||
5784 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5785 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
5786 | #undef TARGET_LITTLE_NAME |
5787 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
5788 | ||
5789 | #undef ELF_OSABI | |
5790 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5791 | ||
5792 | #undef elf64_bed | |
5793 | #define elf64_bed elf64_l1om_fbsd_bed | |
5794 | ||
8a9036a4 | 5795 | #include "elf64-target.h" |
351f65ca | 5796 | |
7a9068fe L |
5797 | /* Intel K1OM support. */ |
5798 | ||
5799 | static bfd_boolean | |
5800 | elf64_k1om_elf_object_p (bfd *abfd) | |
5801 | { | |
5802 | /* Set the right machine number for an K1OM elf64 file. */ | |
5803 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
5804 | return TRUE; | |
5805 | } | |
5806 | ||
5807 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5808 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
5809 | #undef TARGET_LITTLE_NAME |
5810 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
5811 | #undef ELF_ARCH | |
5812 | #define ELF_ARCH bfd_arch_k1om | |
5813 | ||
5814 | #undef ELF_MACHINE_CODE | |
5815 | #define ELF_MACHINE_CODE EM_K1OM | |
5816 | ||
5817 | #undef ELF_OSABI | |
5818 | ||
5819 | #undef elf64_bed | |
5820 | #define elf64_bed elf64_k1om_bed | |
5821 | ||
5822 | #undef elf_backend_object_p | |
5823 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
5824 | ||
5825 | #undef elf_backend_static_tls_alignment | |
5826 | ||
5827 | #undef elf_backend_want_plt_sym | |
5828 | #define elf_backend_want_plt_sym 0 | |
5829 | ||
5830 | #include "elf64-target.h" | |
5831 | ||
5832 | /* FreeBSD K1OM support. */ | |
5833 | ||
5834 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5835 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
5836 | #undef TARGET_LITTLE_NAME |
5837 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
5838 | ||
5839 | #undef ELF_OSABI | |
5840 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5841 | ||
5842 | #undef elf64_bed | |
5843 | #define elf64_bed elf64_k1om_fbsd_bed | |
5844 | ||
5845 | #include "elf64-target.h" | |
5846 | ||
351f65ca L |
5847 | /* 32bit x86-64 support. */ |
5848 | ||
351f65ca | 5849 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5850 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
5851 | #undef TARGET_LITTLE_NAME |
5852 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 5853 | #undef elf32_bed |
351f65ca L |
5854 | |
5855 | #undef ELF_ARCH | |
5856 | #define ELF_ARCH bfd_arch_i386 | |
5857 | ||
5858 | #undef ELF_MACHINE_CODE | |
5859 | #define ELF_MACHINE_CODE EM_X86_64 | |
5860 | ||
351f65ca L |
5861 | #undef ELF_OSABI |
5862 | ||
351f65ca L |
5863 | #undef elf_backend_object_p |
5864 | #define elf_backend_object_p \ | |
5865 | elf32_x86_64_elf_object_p | |
5866 | ||
5867 | #undef elf_backend_bfd_from_remote_memory | |
5868 | #define elf_backend_bfd_from_remote_memory \ | |
5869 | _bfd_elf32_bfd_from_remote_memory | |
5870 | ||
5871 | #undef elf_backend_size_info | |
5872 | #define elf_backend_size_info \ | |
5873 | _bfd_elf32_size_info | |
5874 | ||
5875 | #include "elf32-target.h" |