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351f65ca | 1 | /* X86-64 specific support for ELF |
219d1afa | 2 | Copyright (C) 2000-2018 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 | ||
78984959 L |
199 | /* Set if a relocation is converted from a GOTPCREL relocation. */ |
200 | #define R_X86_64_converted_reloc_bit (1 << 7) | |
201 | ||
daf1c414 | 202 | #define X86_PCREL_TYPE_P(TYPE) \ |
d8045f23 NC |
203 | ( ((TYPE) == R_X86_64_PC8) \ |
204 | || ((TYPE) == R_X86_64_PC16) \ | |
205 | || ((TYPE) == R_X86_64_PC32) \ | |
c3320543 | 206 | || ((TYPE) == R_X86_64_PC32_BND) \ |
d8045f23 NC |
207 | || ((TYPE) == R_X86_64_PC64)) |
208 | ||
aebcc8ff L |
209 | #define X86_SIZE_TYPE_P(TYPE) \ |
210 | ((TYPE) == R_X86_64_SIZE32 || (TYPE) == R_X86_64_SIZE64) | |
211 | ||
8d88c4ca | 212 | /* Map BFD relocs to the x86_64 elf relocs. */ |
70256ad8 AJ |
213 | struct elf_reloc_map |
214 | { | |
8d88c4ca NC |
215 | bfd_reloc_code_real_type bfd_reloc_val; |
216 | unsigned char elf_reloc_val; | |
217 | }; | |
218 | ||
dc810e39 | 219 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 220 | { |
70256ad8 AJ |
221 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
222 | { BFD_RELOC_64, R_X86_64_64, }, | |
223 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
224 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
225 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
226 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
227 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
228 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
229 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
230 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
231 | { BFD_RELOC_32, R_X86_64_32, }, | |
232 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
233 | { BFD_RELOC_16, R_X86_64_16, }, | |
234 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
235 | { BFD_RELOC_8, R_X86_64_8, }, | |
236 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
237 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
238 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
239 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
240 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
241 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
242 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
243 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
244 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
245 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
246 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
247 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
248 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
249 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
250 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
251 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
252 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
1788fc08 L |
253 | { BFD_RELOC_SIZE32, R_X86_64_SIZE32, }, |
254 | { BFD_RELOC_SIZE64, R_X86_64_SIZE64, }, | |
67a4f2b7 AO |
255 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
256 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
257 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
cbe950e9 | 258 | { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, }, |
56ceb5b5 L |
259 | { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND, }, |
260 | { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND, }, | |
261 | { BFD_RELOC_X86_64_GOTPCRELX, R_X86_64_GOTPCRELX, }, | |
262 | { BFD_RELOC_X86_64_REX_GOTPCRELX, R_X86_64_REX_GOTPCRELX, }, | |
fe4770f4 AJ |
263 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
264 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
265 | }; |
266 | ||
67a4f2b7 | 267 | static reloc_howto_type * |
351f65ca | 268 | elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) |
67a4f2b7 AO |
269 | { |
270 | unsigned i; | |
271 | ||
d7921315 L |
272 | if (r_type == (unsigned int) R_X86_64_32) |
273 | { | |
274 | if (ABI_64_P (abfd)) | |
275 | i = r_type; | |
276 | else | |
277 | i = ARRAY_SIZE (x86_64_elf_howto_table) - 1; | |
278 | } | |
279 | else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
280 | || r_type >= (unsigned int) R_X86_64_max) | |
67a4f2b7 AO |
281 | { |
282 | if (r_type >= (unsigned int) R_X86_64_standard) | |
283 | { | |
695344c0 | 284 | /* xgettext:c-format */ |
0aa13fee AM |
285 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
286 | abfd, r_type); | |
f3185997 NC |
287 | bfd_set_error (bfd_error_bad_value); |
288 | return NULL; | |
67a4f2b7 AO |
289 | } |
290 | i = r_type; | |
291 | } | |
292 | else | |
293 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
294 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
295 | return &x86_64_elf_howto_table[i]; | |
296 | } | |
8d88c4ca NC |
297 | |
298 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
299 | static reloc_howto_type * | |
351f65ca L |
300 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
301 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
302 | { |
303 | unsigned int i; | |
27482721 | 304 | |
8d88c4ca NC |
305 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
306 | i++) | |
307 | { | |
308 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
309 | return elf_x86_64_rtype_to_howto (abfd, |
310 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca | 311 | } |
5860e3f8 | 312 | return NULL; |
8d88c4ca NC |
313 | } |
314 | ||
157090f7 | 315 | static reloc_howto_type * |
d7921315 | 316 | elf_x86_64_reloc_name_lookup (bfd *abfd, |
351f65ca | 317 | const char *r_name) |
157090f7 AM |
318 | { |
319 | unsigned int i; | |
320 | ||
d7921315 L |
321 | if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0) |
322 | { | |
323 | /* Get x32 R_X86_64_32. */ | |
324 | reloc_howto_type *reloc | |
325 | = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1]; | |
326 | BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32); | |
327 | return reloc; | |
328 | } | |
329 | ||
330 | for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++) | |
157090f7 AM |
331 | if (x86_64_elf_howto_table[i].name != NULL |
332 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
333 | return &x86_64_elf_howto_table[i]; | |
334 | ||
335 | return NULL; | |
336 | } | |
337 | ||
8d88c4ca | 338 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 339 | |
f3185997 NC |
340 | static bfd_boolean |
341 | elf_x86_64_info_to_howto (bfd *abfd, arelent *cache_ptr, | |
351f65ca | 342 | Elf_Internal_Rela *dst) |
8d88c4ca | 343 | { |
67a4f2b7 | 344 | unsigned r_type; |
8d88c4ca | 345 | |
351f65ca L |
346 | r_type = ELF32_R_TYPE (dst->r_info); |
347 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); | |
f3185997 NC |
348 | if (cache_ptr->howto == NULL) |
349 | return FALSE; | |
262c0a87 | 350 | BFD_ASSERT (r_type == cache_ptr->howto->type || cache_ptr->howto->type == R_X86_64_NONE); |
f3185997 | 351 | return TRUE; |
8d88c4ca | 352 | } |
70256ad8 | 353 | \f |
3bab7989 | 354 | /* Support for core dump NOTE sections. */ |
b34976b6 | 355 | static bfd_boolean |
351f65ca | 356 | elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
357 | { |
358 | int offset; | |
eea6121a | 359 | size_t size; |
3bab7989 ML |
360 | |
361 | switch (note->descsz) | |
362 | { | |
363 | default: | |
b34976b6 | 364 | return FALSE; |
3bab7989 | 365 | |
bcd823f1 L |
366 | case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */ |
367 | /* pr_cursig */ | |
228e534f | 368 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
bcd823f1 L |
369 | |
370 | /* pr_pid */ | |
228e534f | 371 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
bcd823f1 L |
372 | |
373 | /* pr_reg */ | |
374 | offset = 72; | |
375 | size = 216; | |
376 | ||
377 | break; | |
378 | ||
3bab7989 ML |
379 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ |
380 | /* pr_cursig */ | |
228e534f | 381 | elf_tdata (abfd)->core->signal |
3bab7989 ML |
382 | = bfd_get_16 (abfd, note->descdata + 12); |
383 | ||
384 | /* pr_pid */ | |
228e534f | 385 | elf_tdata (abfd)->core->lwpid |
3bab7989 ML |
386 | = bfd_get_32 (abfd, note->descdata + 32); |
387 | ||
388 | /* pr_reg */ | |
389 | offset = 112; | |
eea6121a | 390 | size = 216; |
3bab7989 ML |
391 | |
392 | break; | |
393 | } | |
394 | ||
395 | /* Make a ".reg/999" section. */ | |
396 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 397 | size, note->descpos + offset); |
3bab7989 ML |
398 | } |
399 | ||
b34976b6 | 400 | static bfd_boolean |
351f65ca | 401 | elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
402 | { |
403 | switch (note->descsz) | |
404 | { | |
405 | default: | |
b34976b6 | 406 | return FALSE; |
3bab7989 | 407 | |
bcd823f1 | 408 | case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */ |
228e534f | 409 | elf_tdata (abfd)->core->pid |
bcd823f1 | 410 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 411 | elf_tdata (abfd)->core->program |
bcd823f1 | 412 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 413 | elf_tdata (abfd)->core->command |
bcd823f1 L |
414 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
415 | break; | |
416 | ||
3bab7989 | 417 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ |
228e534f | 418 | elf_tdata (abfd)->core->pid |
261b8d08 | 419 | = bfd_get_32 (abfd, note->descdata + 24); |
228e534f | 420 | elf_tdata (abfd)->core->program |
3bab7989 | 421 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
228e534f | 422 | elf_tdata (abfd)->core->command |
3bab7989 ML |
423 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
424 | } | |
425 | ||
426 | /* Note that for some reason, a spurious space is tacked | |
427 | onto the end of the args in some (at least one anyway) | |
428 | implementations, so strip it off if it exists. */ | |
429 | ||
430 | { | |
228e534f | 431 | char *command = elf_tdata (abfd)->core->command; |
3bab7989 ML |
432 | int n = strlen (command); |
433 | ||
434 | if (0 < n && command[n - 1] == ' ') | |
435 | command[n - 1] = '\0'; | |
436 | } | |
437 | ||
b34976b6 | 438 | return TRUE; |
3bab7989 | 439 | } |
8fd79e71 L |
440 | |
441 | #ifdef CORE_HEADER | |
602f1657 AM |
442 | # if GCC_VERSION >= 8000 |
443 | # pragma GCC diagnostic push | |
444 | # pragma GCC diagnostic ignored "-Wstringop-truncation" | |
445 | # endif | |
8fd79e71 L |
446 | static char * |
447 | elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz, | |
448 | int note_type, ...) | |
449 | { | |
450 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8fd79e71 L |
451 | va_list ap; |
452 | const char *fname, *psargs; | |
453 | long pid; | |
454 | int cursig; | |
455 | const void *gregs; | |
456 | ||
457 | switch (note_type) | |
458 | { | |
459 | default: | |
460 | return NULL; | |
461 | ||
462 | case NT_PRPSINFO: | |
463 | va_start (ap, note_type); | |
464 | fname = va_arg (ap, const char *); | |
465 | psargs = va_arg (ap, const char *); | |
466 | va_end (ap); | |
467 | ||
468 | if (bed->s->elfclass == ELFCLASS32) | |
469 | { | |
470 | prpsinfo32_t data; | |
471 | memset (&data, 0, sizeof (data)); | |
472 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
473 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
474 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
475 | &data, sizeof (data)); | |
8fd79e71 L |
476 | } |
477 | else | |
478 | { | |
b1bd052d | 479 | prpsinfo64_t data; |
8fd79e71 L |
480 | memset (&data, 0, sizeof (data)); |
481 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
482 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
483 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
484 | &data, sizeof (data)); | |
8fd79e71 | 485 | } |
e85c6a70 | 486 | /* NOTREACHED */ |
8fd79e71 L |
487 | |
488 | case NT_PRSTATUS: | |
489 | va_start (ap, note_type); | |
490 | pid = va_arg (ap, long); | |
491 | cursig = va_arg (ap, int); | |
492 | gregs = va_arg (ap, const void *); | |
493 | va_end (ap); | |
494 | ||
495 | if (bed->s->elfclass == ELFCLASS32) | |
496 | { | |
497 | if (bed->elf_machine_code == EM_X86_64) | |
498 | { | |
499 | prstatusx32_t prstat; | |
500 | memset (&prstat, 0, sizeof (prstat)); | |
501 | prstat.pr_pid = pid; | |
502 | prstat.pr_cursig = cursig; | |
503 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
504 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
505 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
506 | } |
507 | else | |
508 | { | |
509 | prstatus32_t prstat; | |
510 | memset (&prstat, 0, sizeof (prstat)); | |
511 | prstat.pr_pid = pid; | |
512 | prstat.pr_cursig = cursig; | |
513 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
514 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
515 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
516 | } |
517 | } | |
518 | else | |
519 | { | |
b1bd052d | 520 | prstatus64_t prstat; |
8fd79e71 L |
521 | memset (&prstat, 0, sizeof (prstat)); |
522 | prstat.pr_pid = pid; | |
523 | prstat.pr_cursig = cursig; | |
524 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
525 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
526 | &prstat, sizeof (prstat)); | |
8fd79e71 | 527 | } |
8fd79e71 | 528 | } |
e85c6a70 | 529 | /* NOTREACHED */ |
8fd79e71 | 530 | } |
602f1657 AM |
531 | # if GCC_VERSION >= 8000 |
532 | # pragma GCC diagnostic pop | |
533 | # endif | |
8fd79e71 | 534 | #endif |
3bab7989 | 535 | \f |
407443a3 | 536 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 537 | |
70256ad8 AJ |
538 | /* The size in bytes of an entry in the global offset table. */ |
539 | ||
540 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 541 | |
38b12349 | 542 | /* The size in bytes of an entry in the lazy procedure linkage table. */ |
8d88c4ca | 543 | |
38b12349 | 544 | #define LAZY_PLT_ENTRY_SIZE 16 |
70256ad8 | 545 | |
38b12349 L |
546 | /* The size in bytes of an entry in the non-lazy procedure linkage |
547 | table. */ | |
70256ad8 | 548 | |
38b12349 L |
549 | #define NON_LAZY_PLT_ENTRY_SIZE 8 |
550 | ||
551 | /* The first entry in a lazy procedure linkage table looks like this. | |
552 | See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this | |
553 | works. */ | |
554 | ||
555 | static const bfd_byte elf_x86_64_lazy_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
70256ad8 | 556 | { |
653165cc AJ |
557 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
558 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 559 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
560 | }; |
561 | ||
38b12349 | 562 | /* Subsequent entries in a lazy procedure linkage table look like this. */ |
70256ad8 | 563 | |
38b12349 | 564 | static const bfd_byte elf_x86_64_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
70256ad8 | 565 | { |
653165cc | 566 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 567 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 568 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
569 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
570 | 0xe9, /* jmp relative */ | |
571 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
572 | }; | |
573 | ||
38b12349 | 574 | /* The first entry in a lazy procedure linkage table with BND prefix |
0ff2b86e L |
575 | like this. */ |
576 | ||
38b12349 | 577 | static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 578 | { |
07d6d2b8 | 579 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
0ff2b86e | 580 | 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */ |
07d6d2b8 | 581 | 0x0f, 0x1f, 0 /* nopl (%rax) */ |
0ff2b86e L |
582 | }; |
583 | ||
38b12349 L |
584 | /* Subsequent entries for branches with BND prefx in a lazy procedure |
585 | linkage table look like this. */ | |
0ff2b86e | 586 | |
38b12349 | 587 | static const bfd_byte elf_x86_64_lazy_bnd_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 588 | { |
07d6d2b8 AM |
589 | 0x68, 0, 0, 0, 0, /* pushq immediate */ |
590 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
591 | 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */ | |
0ff2b86e L |
592 | }; |
593 | ||
ee2fdd6f L |
594 | /* The first entry in the IBT-enabled lazy procedure linkage table is the |
595 | the same as the lazy PLT with BND prefix so that bound registers are | |
596 | preserved when control is passed to dynamic linker. Subsequent | |
597 | entries for a IBT-enabled lazy procedure linkage table look like | |
598 | this. */ | |
599 | ||
600 | static const bfd_byte elf_x86_64_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
601 | { | |
07d6d2b8 AM |
602 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
603 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
604 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
605 | 0x90 /* nop */ | |
ee2fdd6f L |
606 | }; |
607 | ||
608 | /* The first entry in the x32 IBT-enabled lazy procedure linkage table | |
de194d85 | 609 | is the same as the normal lazy PLT. Subsequent entries for an |
ee2fdd6f L |
610 | x32 IBT-enabled lazy procedure linkage table look like this. */ |
611 | ||
612 | static const bfd_byte elf_x32_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
613 | { | |
07d6d2b8 AM |
614 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
615 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
616 | 0xe9, 0, 0, 0, 0, /* jmpq relative */ | |
617 | 0x66, 0x90 /* xchg %ax,%ax */ | |
ee2fdd6f L |
618 | }; |
619 | ||
38b12349 | 620 | /* Entries in the non-lazey procedure linkage table look like this. */ |
0ff2b86e | 621 | |
38b12349 | 622 | static const bfd_byte elf_x86_64_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 623 | { |
07d6d2b8 AM |
624 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
625 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
626 | 0x66, 0x90 /* xchg %ax,%ax */ | |
0ff2b86e L |
627 | }; |
628 | ||
38b12349 L |
629 | /* Entries for branches with BND prefix in the non-lazey procedure |
630 | linkage table look like this. */ | |
0ff2b86e | 631 | |
38b12349 | 632 | static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 633 | { |
07d6d2b8 AM |
634 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ |
635 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
636 | 0x90 /* nop */ | |
0ff2b86e L |
637 | }; |
638 | ||
ee2fdd6f L |
639 | /* Entries for branches with IBT-enabled in the non-lazey procedure |
640 | linkage table look like this. They have the same size as the lazy | |
641 | PLT entry. */ | |
642 | ||
643 | static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
644 | { | |
07d6d2b8 AM |
645 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
646 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ | |
ee2fdd6f | 647 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
07d6d2b8 | 648 | 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */ |
ee2fdd6f L |
649 | }; |
650 | ||
651 | /* Entries for branches with IBT-enabled in the x32 non-lazey procedure | |
652 | linkage table look like this. They have the same size as the lazy | |
653 | PLT entry. */ | |
654 | ||
655 | static const bfd_byte elf_x32_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
656 | { | |
07d6d2b8 AM |
657 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
658 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ | |
ee2fdd6f L |
659 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
660 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
661 | }; | |
662 | ||
92e68c1d L |
663 | /* The TLSDESC entry in a lazy procedure linkage table. */ |
664 | static const bfd_byte elf_x86_64_tlsdesc_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
665 | { | |
666 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
667 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
668 | 0xff, 0x25, 16, 0, 0, 0 /* jmpq *GOT+TDG(%rip) */ | |
669 | }; | |
670 | ||
38b12349 | 671 | /* .eh_frame covering the lazy .plt section. */ |
e41b3a13 | 672 | |
38b12349 | 673 | static const bfd_byte elf_x86_64_eh_frame_lazy_plt[] = |
e41b3a13 | 674 | { |
e41b3a13 JJ |
675 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ |
676 | 0, 0, 0, 0, /* CIE ID */ | |
677 | 1, /* CIE version */ | |
678 | 'z', 'R', 0, /* Augmentation string */ | |
679 | 1, /* Code alignment factor */ | |
680 | 0x78, /* Data alignment factor */ | |
681 | 16, /* Return address column */ | |
682 | 1, /* Augmentation size */ | |
683 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
684 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
685 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
686 | DW_CFA_nop, DW_CFA_nop, | |
687 | ||
688 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
689 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
690 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
691 | 0, 0, 0, 0, /* .plt size goes here */ | |
692 | 0, /* Augmentation size */ | |
693 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
694 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
695 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
696 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
697 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
698 | 11, /* Block length */ | |
699 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
700 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
701 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
702 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
703 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
704 | }; | |
705 | ||
38b12349 | 706 | /* .eh_frame covering the lazy BND .plt section. */ |
9e659176 | 707 | |
38b12349 | 708 | static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt[] = |
9e659176 L |
709 | { |
710 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
711 | 0, 0, 0, 0, /* CIE ID */ | |
712 | 1, /* CIE version */ | |
713 | 'z', 'R', 0, /* Augmentation string */ | |
714 | 1, /* Code alignment factor */ | |
715 | 0x78, /* Data alignment factor */ | |
716 | 16, /* Return address column */ | |
717 | 1, /* Augmentation size */ | |
718 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
719 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
720 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
721 | DW_CFA_nop, DW_CFA_nop, | |
722 | ||
723 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
724 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
725 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
726 | 0, 0, 0, 0, /* .plt size goes here */ | |
727 | 0, /* Augmentation size */ | |
728 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
729 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
730 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
731 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
732 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
733 | 11, /* Block length */ | |
734 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
735 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
736 | DW_OP_lit15, DW_OP_and, DW_OP_lit5, DW_OP_ge, | |
737 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
738 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
739 | }; | |
740 | ||
ee2fdd6f L |
741 | /* .eh_frame covering the lazy .plt section with IBT-enabled. */ |
742 | ||
743 | static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt[] = | |
744 | { | |
745 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
746 | 0, 0, 0, 0, /* CIE ID */ | |
747 | 1, /* CIE version */ | |
748 | 'z', 'R', 0, /* Augmentation string */ | |
749 | 1, /* Code alignment factor */ | |
750 | 0x78, /* Data alignment factor */ | |
751 | 16, /* Return address column */ | |
752 | 1, /* Augmentation size */ | |
753 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
754 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
755 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
756 | DW_CFA_nop, DW_CFA_nop, | |
757 | ||
758 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
759 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
760 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
761 | 0, 0, 0, 0, /* .plt size goes here */ | |
762 | 0, /* Augmentation size */ | |
763 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
764 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
765 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
766 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
767 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
768 | 11, /* Block length */ | |
769 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
770 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
771 | DW_OP_lit15, DW_OP_and, DW_OP_lit10, DW_OP_ge, | |
772 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
773 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
774 | }; | |
775 | ||
776 | /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */ | |
777 | ||
778 | static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt[] = | |
779 | { | |
780 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
781 | 0, 0, 0, 0, /* CIE ID */ | |
782 | 1, /* CIE version */ | |
783 | 'z', 'R', 0, /* Augmentation string */ | |
784 | 1, /* Code alignment factor */ | |
785 | 0x78, /* Data alignment factor */ | |
786 | 16, /* Return address column */ | |
787 | 1, /* Augmentation size */ | |
788 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
789 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
790 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
791 | DW_CFA_nop, DW_CFA_nop, | |
792 | ||
793 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
794 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
795 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
796 | 0, 0, 0, 0, /* .plt size goes here */ | |
797 | 0, /* Augmentation size */ | |
798 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
799 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
800 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
801 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
802 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
803 | 11, /* Block length */ | |
804 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
805 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
806 | DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge, | |
807 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
808 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
809 | }; | |
810 | ||
38b12349 | 811 | /* .eh_frame covering the non-lazy .plt section. */ |
fff53dae | 812 | |
38b12349 | 813 | static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt[] = |
fff53dae L |
814 | { |
815 | #define PLT_GOT_FDE_LENGTH 20 | |
816 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
817 | 0, 0, 0, 0, /* CIE ID */ | |
818 | 1, /* CIE version */ | |
819 | 'z', 'R', 0, /* Augmentation string */ | |
820 | 1, /* Code alignment factor */ | |
821 | 0x78, /* Data alignment factor */ | |
822 | 16, /* Return address column */ | |
823 | 1, /* Augmentation size */ | |
824 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
825 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
826 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
827 | DW_CFA_nop, DW_CFA_nop, | |
828 | ||
829 | PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
830 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
38b12349 L |
831 | 0, 0, 0, 0, /* the start of non-lazy .plt goes here */ |
832 | 0, 0, 0, 0, /* non-lazy .plt size goes here */ | |
fff53dae L |
833 | 0, /* Augmentation size */ |
834 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, | |
835 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
836 | }; | |
837 | ||
eed180f8 | 838 | /* These are the standard parameters. */ |
765e526c | 839 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt = |
eed180f8 | 840 | { |
07d6d2b8 AM |
841 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ |
842 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
843 | elf_x86_64_lazy_plt_entry, /* plt_entry */ | |
844 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
845 | elf_x86_64_tlsdesc_plt_entry, /* plt_tlsdesc_entry */ |
846 | LAZY_PLT_ENTRY_SIZE, /* plt_tlsdesc_entry_size */ | |
847 | 6, /* plt_tlsdesc_got1_offset */ | |
848 | 12, /* plt_tlsdesc_got2_offset */ | |
849 | 10, /* plt_tlsdesc_got1_insn_end */ | |
850 | 16, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
851 | 2, /* plt0_got1_offset */ |
852 | 8, /* plt0_got2_offset */ | |
853 | 12, /* plt0_got2_insn_end */ | |
854 | 2, /* plt_got_offset */ | |
855 | 7, /* plt_reloc_offset */ | |
856 | 12, /* plt_plt_offset */ | |
857 | 6, /* plt_got_insn_size */ | |
858 | LAZY_PLT_ENTRY_SIZE, /* plt_plt_insn_end */ | |
859 | 6, /* plt_lazy_offset */ | |
860 | elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */ | |
861 | elf_x86_64_lazy_plt_entry, /* pic_plt_entry */ | |
862 | elf_x86_64_eh_frame_lazy_plt, /* eh_frame_plt */ | |
38b12349 L |
863 | sizeof (elf_x86_64_eh_frame_lazy_plt) /* eh_frame_plt_size */ |
864 | }; | |
865 | ||
765e526c | 866 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_plt = |
38b12349 | 867 | { |
07d6d2b8 AM |
868 | elf_x86_64_non_lazy_plt_entry, /* plt_entry */ |
869 | elf_x86_64_non_lazy_plt_entry, /* pic_plt_entry */ | |
870 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
871 | 2, /* plt_got_offset */ | |
872 | 6, /* plt_got_insn_size */ | |
873 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
38b12349 | 874 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
eed180f8 RM |
875 | }; |
876 | ||
765e526c | 877 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_bnd_plt = |
0ff2b86e | 878 | { |
07d6d2b8 AM |
879 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ |
880 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
881 | elf_x86_64_lazy_bnd_plt_entry, /* plt_entry */ | |
882 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
883 | elf_x86_64_tlsdesc_plt_entry, /* plt_tlsdesc_entry */ |
884 | LAZY_PLT_ENTRY_SIZE, /* plt_tlsdesc_entry_size */ | |
885 | 6, /* plt_tlsdesc_got1_offset */ | |
886 | 12, /* plt_tlsdesc_got2_offset */ | |
887 | 10, /* plt_tlsdesc_got1_insn_end */ | |
888 | 16, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
889 | 2, /* plt0_got1_offset */ |
890 | 1+8, /* plt0_got2_offset */ | |
891 | 1+12, /* plt0_got2_insn_end */ | |
892 | 1+2, /* plt_got_offset */ | |
893 | 1, /* plt_reloc_offset */ | |
894 | 7, /* plt_plt_offset */ | |
895 | 1+6, /* plt_got_insn_size */ | |
896 | 11, /* plt_plt_insn_end */ | |
897 | 0, /* plt_lazy_offset */ | |
898 | elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */ | |
899 | elf_x86_64_lazy_bnd_plt_entry, /* pic_plt_entry */ | |
900 | elf_x86_64_eh_frame_lazy_bnd_plt, /* eh_frame_plt */ | |
38b12349 L |
901 | sizeof (elf_x86_64_eh_frame_lazy_bnd_plt) /* eh_frame_plt_size */ |
902 | }; | |
903 | ||
765e526c | 904 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt = |
38b12349 | 905 | { |
07d6d2b8 AM |
906 | elf_x86_64_non_lazy_bnd_plt_entry, /* plt_entry */ |
907 | elf_x86_64_non_lazy_bnd_plt_entry, /* pic_plt_entry */ | |
908 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
909 | 1+2, /* plt_got_offset */ | |
910 | 1+6, /* plt_got_insn_size */ | |
911 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
38b12349 L |
912 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
913 | }; | |
914 | ||
765e526c | 915 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt = |
ee2fdd6f | 916 | { |
07d6d2b8 AM |
917 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ |
918 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
919 | elf_x86_64_lazy_ibt_plt_entry, /* plt_entry */ | |
920 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
921 | elf_x86_64_tlsdesc_plt_entry, /* plt_tlsdesc_entry */ |
922 | LAZY_PLT_ENTRY_SIZE, /* plt_tlsdesc_entry_size */ | |
923 | 6, /* plt_tlsdesc_got1_offset */ | |
924 | 12, /* plt_tlsdesc_got2_offset */ | |
925 | 10, /* plt_tlsdesc_got1_insn_end */ | |
926 | 16, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
927 | 2, /* plt0_got1_offset */ |
928 | 1+8, /* plt0_got2_offset */ | |
929 | 1+12, /* plt0_got2_insn_end */ | |
930 | 4+1+2, /* plt_got_offset */ | |
931 | 4+1, /* plt_reloc_offset */ | |
932 | 4+1+6, /* plt_plt_offset */ | |
933 | 4+1+6, /* plt_got_insn_size */ | |
934 | 4+1+5+5, /* plt_plt_insn_end */ | |
935 | 0, /* plt_lazy_offset */ | |
936 | elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */ | |
937 | elf_x86_64_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
938 | elf_x86_64_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
939 | sizeof (elf_x86_64_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ |
940 | }; | |
941 | ||
765e526c | 942 | static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt = |
ee2fdd6f | 943 | { |
07d6d2b8 AM |
944 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ |
945 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
946 | elf_x32_lazy_ibt_plt_entry, /* plt_entry */ | |
947 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
948 | elf_x86_64_tlsdesc_plt_entry, /* plt_tlsdesc_entry */ |
949 | LAZY_PLT_ENTRY_SIZE, /* plt_tlsdesc_entry_size */ | |
950 | 6, /* plt_tlsdesc_got1_offset */ | |
951 | 12, /* plt_tlsdesc_got2_offset */ | |
952 | 10, /* plt_tlsdesc_got1_insn_end */ | |
953 | 16, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
954 | 2, /* plt0_got1_offset */ |
955 | 8, /* plt0_got2_offset */ | |
956 | 12, /* plt0_got2_insn_end */ | |
957 | 4+2, /* plt_got_offset */ | |
958 | 4+1, /* plt_reloc_offset */ | |
959 | 4+6, /* plt_plt_offset */ | |
960 | 4+6, /* plt_got_insn_size */ | |
961 | 4+5+5, /* plt_plt_insn_end */ | |
962 | 0, /* plt_lazy_offset */ | |
963 | elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */ | |
964 | elf_x32_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
965 | elf_x32_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
966 | sizeof (elf_x32_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ |
967 | }; | |
968 | ||
765e526c | 969 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt = |
ee2fdd6f | 970 | { |
07d6d2b8 AM |
971 | elf_x86_64_non_lazy_ibt_plt_entry, /* plt_entry */ |
972 | elf_x86_64_non_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
973 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
974 | 4+1+2, /* plt_got_offset */ | |
975 | 4+1+6, /* plt_got_insn_size */ | |
976 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
977 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
978 | }; | |
979 | ||
765e526c | 980 | static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt = |
ee2fdd6f | 981 | { |
07d6d2b8 AM |
982 | elf_x32_non_lazy_ibt_plt_entry, /* plt_entry */ |
983 | elf_x32_non_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
984 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
985 | 4+2, /* plt_got_offset */ | |
986 | 4+6, /* plt_got_insn_size */ | |
987 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
988 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
989 | }; | |
990 | ||
851b6fa1 | 991 | static const struct elf_x86_backend_data elf_x86_64_arch_bed = |
38b12349 | 992 | { |
07d6d2b8 | 993 | is_normal /* os */ |
0ff2b86e L |
994 | }; |
995 | ||
eed180f8 RM |
996 | #define elf_backend_arch_data &elf_x86_64_arch_bed |
997 | ||
b34976b6 | 998 | static bfd_boolean |
27482721 | 999 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 1000 | { |
8d88c4ca NC |
1001 | /* Set the right machine number for an x86-64 elf64 file. */ |
1002 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 1003 | return TRUE; |
8d88c4ca NC |
1004 | } |
1005 | ||
8059fb19 RM |
1006 | static bfd_boolean |
1007 | elf32_x86_64_elf_object_p (bfd *abfd) | |
1008 | { | |
1009 | /* Set the right machine number for an x86-64 elf32 file. */ | |
1010 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
1011 | return TRUE; | |
1012 | } | |
1013 | ||
142411ca L |
1014 | /* Return TRUE if the TLS access code sequence support transition |
1015 | from R_TYPE. */ | |
1016 | ||
1017 | static bfd_boolean | |
351f65ca L |
1018 | elf_x86_64_check_tls_transition (bfd *abfd, |
1019 | struct bfd_link_info *info, | |
1020 | asection *sec, | |
1021 | bfd_byte *contents, | |
1022 | Elf_Internal_Shdr *symtab_hdr, | |
1023 | struct elf_link_hash_entry **sym_hashes, | |
1024 | unsigned int r_type, | |
1025 | const Elf_Internal_Rela *rel, | |
1026 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1027 | { |
142411ca L |
1028 | unsigned int val; |
1029 | unsigned long r_symndx; | |
5c98a14e | 1030 | bfd_boolean largepic = FALSE; |
142411ca L |
1031 | struct elf_link_hash_entry *h; |
1032 | bfd_vma offset; | |
0afcef53 | 1033 | struct elf_x86_link_hash_table *htab; |
e2cbcd91 | 1034 | bfd_byte *call; |
1d4af308 | 1035 | bfd_boolean indirect_call; |
142411ca | 1036 | |
0afcef53 | 1037 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
142411ca | 1038 | offset = rel->r_offset; |
bffbf940 | 1039 | switch (r_type) |
142411ca L |
1040 | { |
1041 | case R_X86_64_TLSGD: | |
1042 | case R_X86_64_TLSLD: | |
1043 | if ((rel + 1) >= relend) | |
1044 | return FALSE; | |
1045 | ||
1046 | if (r_type == R_X86_64_TLSGD) | |
1047 | { | |
52bc799a | 1048 | /* Check transition from GD access model. For 64bit, only |
142411ca | 1049 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
e2cbcd91 L |
1050 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1051 | or | |
1052 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
1053 | .byte 0x66; rex64 | |
1054 | call *__tls_get_addr@GOTPCREL(%rip) | |
1055 | which may be converted to | |
1056 | addr32 call __tls_get_addr | |
52bc799a L |
1057 | can transit to different access model. For 32bit, only |
1058 | leaq foo@tlsgd(%rip), %rdi | |
e2cbcd91 L |
1059 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1060 | or | |
1061 | leaq foo@tlsgd(%rip), %rdi | |
1062 | .byte 0x66; rex64 | |
1063 | call *__tls_get_addr@GOTPCREL(%rip) | |
1064 | which may be converted to | |
1065 | addr32 call __tls_get_addr | |
1066 | can transit to different access model. For largepic, | |
5c98a14e | 1067 | we also support: |
07d6d2b8 AM |
1068 | leaq foo@tlsgd(%rip), %rdi |
1069 | movabsq $__tls_get_addr@pltoff, %rax | |
1070 | addq $r15, %rax | |
1071 | call *%rax | |
e2cbcd91 | 1072 | or |
07d6d2b8 AM |
1073 | leaq foo@tlsgd(%rip), %rdi |
1074 | movabsq $__tls_get_addr@pltoff, %rax | |
1075 | addq $rbx, %rax | |
1076 | call *%rax */ | |
142411ca | 1077 | |
fa289a5f AM |
1078 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; |
1079 | ||
5c98a14e | 1080 | if ((offset + 12) > sec->size) |
142411ca | 1081 | return FALSE; |
52bc799a | 1082 | |
e2cbcd91 L |
1083 | call = contents + offset + 4; |
1084 | if (call[0] != 0x66 | |
1085 | || !((call[1] == 0x48 | |
1086 | && call[2] == 0xff | |
1087 | && call[3] == 0x15) | |
1088 | || (call[1] == 0x48 | |
1089 | && call[2] == 0x67 | |
1090 | && call[3] == 0xe8) | |
1091 | || (call[1] == 0x66 | |
1092 | && call[2] == 0x48 | |
1093 | && call[3] == 0xe8))) | |
5c98a14e JJ |
1094 | { |
1095 | if (!ABI_64_P (abfd) | |
1096 | || (offset + 19) > sec->size | |
1097 | || offset < 3 | |
e2cbcd91 L |
1098 | || memcmp (call - 7, leaq + 1, 3) != 0 |
1099 | || memcmp (call, "\x48\xb8", 2) != 0 | |
1100 | || call[11] != 0x01 | |
1101 | || call[13] != 0xff | |
1102 | || call[14] != 0xd0 | |
1103 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1104 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1105 | return FALSE; |
1106 | largepic = TRUE; | |
1107 | } | |
1108 | else if (ABI_64_P (abfd)) | |
52bc799a | 1109 | { |
52bc799a | 1110 | if (offset < 4 |
fa289a5f | 1111 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1112 | return FALSE; |
1113 | } | |
1114 | else | |
1115 | { | |
52bc799a | 1116 | if (offset < 3 |
fa289a5f | 1117 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1118 | return FALSE; |
1119 | } | |
e2cbcd91 | 1120 | indirect_call = call[2] == 0xff; |
142411ca L |
1121 | } |
1122 | else | |
1123 | { | |
1124 | /* Check transition from LD access model. Only | |
1125 | leaq foo@tlsld(%rip), %rdi; | |
e2cbcd91 | 1126 | call __tls_get_addr@PLT |
07d6d2b8 | 1127 | or |
e2cbcd91 L |
1128 | leaq foo@tlsld(%rip), %rdi; |
1129 | call *__tls_get_addr@GOTPCREL(%rip) | |
1130 | which may be converted to | |
1131 | addr32 call __tls_get_addr | |
5c98a14e JJ |
1132 | can transit to different access model. For largepic |
1133 | we also support: | |
07d6d2b8 AM |
1134 | leaq foo@tlsld(%rip), %rdi |
1135 | movabsq $__tls_get_addr@pltoff, %rax | |
1136 | addq $r15, %rax | |
1137 | call *%rax | |
e2cbcd91 | 1138 | or |
07d6d2b8 AM |
1139 | leaq foo@tlsld(%rip), %rdi |
1140 | movabsq $__tls_get_addr@pltoff, %rax | |
1141 | addq $rbx, %rax | |
1142 | call *%rax */ | |
142411ca | 1143 | |
fa289a5f | 1144 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1145 | |
1146 | if (offset < 3 || (offset + 9) > sec->size) | |
1147 | return FALSE; | |
1148 | ||
5c98a14e | 1149 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
142411ca | 1150 | return FALSE; |
5c98a14e | 1151 | |
e2cbcd91 L |
1152 | call = contents + offset + 4; |
1153 | if (!(call[0] == 0xe8 | |
1154 | || (call[0] == 0xff && call[1] == 0x15) | |
1155 | || (call[0] == 0x67 && call[1] == 0xe8))) | |
5c98a14e JJ |
1156 | { |
1157 | if (!ABI_64_P (abfd) | |
1158 | || (offset + 19) > sec->size | |
e2cbcd91 L |
1159 | || memcmp (call, "\x48\xb8", 2) != 0 |
1160 | || call[11] != 0x01 | |
1161 | || call[13] != 0xff | |
1162 | || call[14] != 0xd0 | |
1163 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1164 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1165 | return FALSE; |
1166 | largepic = TRUE; | |
1167 | } | |
e2cbcd91 | 1168 | indirect_call = call[0] == 0xff; |
142411ca L |
1169 | } |
1170 | ||
351f65ca | 1171 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1172 | if (r_symndx < symtab_hdr->sh_info) |
1173 | return FALSE; | |
1174 | ||
1175 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1d4af308 | 1176 | if (h == NULL |
0afcef53 | 1177 | || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr) |
e2cbcd91 | 1178 | return FALSE; |
e2cbcd91 | 1179 | else |
78984959 L |
1180 | { |
1181 | r_type = (ELF32_R_TYPE (rel[1].r_info) | |
1182 | & ~R_X86_64_converted_reloc_bit); | |
1183 | if (largepic) | |
1184 | return r_type == R_X86_64_PLTOFF64; | |
1185 | else if (indirect_call) | |
1186 | return r_type == R_X86_64_GOTPCRELX; | |
1187 | else | |
1188 | return (r_type == R_X86_64_PC32 || r_type == R_X86_64_PLT32); | |
1189 | } | |
142411ca L |
1190 | |
1191 | case R_X86_64_GOTTPOFF: | |
1192 | /* Check transition from IE access model: | |
4a4c5f25 L |
1193 | mov foo@gottpoff(%rip), %reg |
1194 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1195 | */ |
1196 | ||
4a4c5f25 L |
1197 | /* Check REX prefix first. */ |
1198 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1199 | { | |
1200 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1201 | if (val != 0x48 && val != 0x4c) | |
1202 | { | |
1203 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1204 | if (ABI_64_P (abfd)) | |
1205 | return FALSE; | |
1206 | } | |
1207 | } | |
1208 | else | |
1209 | { | |
1210 | /* X32 may not have any REX prefix. */ | |
1211 | if (ABI_64_P (abfd)) | |
1212 | return FALSE; | |
1213 | if (offset < 2 || (offset + 3) > sec->size) | |
1214 | return FALSE; | |
1215 | } | |
142411ca L |
1216 | |
1217 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1218 | if (val != 0x8b && val != 0x03) | |
1219 | return FALSE; | |
1220 | ||
1221 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1222 | return (val & 0xc7) == 5; | |
1223 | ||
1224 | case R_X86_64_GOTPC32_TLSDESC: | |
1225 | /* Check transition from GDesc access model: | |
1226 | leaq x@tlsdesc(%rip), %rax | |
1227 | ||
1228 | Make sure it's a leaq adding rip to a 32-bit offset | |
1229 | into any register, although it's probably almost always | |
1230 | going to be rax. */ | |
1231 | ||
1232 | if (offset < 3 || (offset + 4) > sec->size) | |
1233 | return FALSE; | |
1234 | ||
1235 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1236 | if ((val & 0xfb) != 0x48) | |
1237 | return FALSE; | |
1238 | ||
1239 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1240 | return FALSE; | |
1241 | ||
1242 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1243 | return (val & 0xc7) == 0x05; | |
1244 | ||
1245 | case R_X86_64_TLSDESC_CALL: | |
1246 | /* Check transition from GDesc access model: | |
1247 | call *x@tlsdesc(%rax) | |
1248 | */ | |
1249 | if (offset + 2 <= sec->size) | |
1250 | { | |
1251 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
e2cbcd91 L |
1252 | call = contents + offset; |
1253 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1254 | } |
1255 | ||
1256 | return FALSE; | |
1257 | ||
1258 | default: | |
1259 | abort (); | |
1260 | } | |
1261 | } | |
1262 | ||
1263 | /* Return TRUE if the TLS access transition is OK or no transition | |
1264 | will be performed. Update R_TYPE if there is a transition. */ | |
1265 | ||
1266 | static bfd_boolean | |
351f65ca L |
1267 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1268 | asection *sec, bfd_byte *contents, | |
1269 | Elf_Internal_Shdr *symtab_hdr, | |
1270 | struct elf_link_hash_entry **sym_hashes, | |
1271 | unsigned int *r_type, int tls_type, | |
1272 | const Elf_Internal_Rela *rel, | |
1273 | const Elf_Internal_Rela *relend, | |
1274 | struct elf_link_hash_entry *h, | |
bedfd056 L |
1275 | unsigned long r_symndx, |
1276 | bfd_boolean from_relocate_section) | |
142411ca L |
1277 | { |
1278 | unsigned int from_type = *r_type; | |
1279 | unsigned int to_type = from_type; | |
1280 | bfd_boolean check = TRUE; | |
1281 | ||
bb1cb422 L |
1282 | /* Skip TLS transition for functions. */ |
1283 | if (h != NULL | |
1284 | && (h->type == STT_FUNC | |
1285 | || h->type == STT_GNU_IFUNC)) | |
1286 | return TRUE; | |
1287 | ||
142411ca | 1288 | switch (from_type) |
bffbf940 JJ |
1289 | { |
1290 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1291 | case R_X86_64_GOTPC32_TLSDESC: |
1292 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1293 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1294 | if (bfd_link_executable (info)) |
142411ca L |
1295 | { |
1296 | if (h == NULL) | |
1297 | to_type = R_X86_64_TPOFF32; | |
1298 | else | |
1299 | to_type = R_X86_64_GOTTPOFF; | |
1300 | } | |
1301 | ||
bedfd056 L |
1302 | /* When we are called from elf_x86_64_relocate_section, there may |
1303 | be additional transitions based on TLS_TYPE. */ | |
1304 | if (from_relocate_section) | |
142411ca L |
1305 | { |
1306 | unsigned int new_to_type = to_type; | |
1307 | ||
51537393 | 1308 | if (TLS_TRANSITION_IE_TO_LE_P (info, h, tls_type)) |
142411ca L |
1309 | new_to_type = R_X86_64_TPOFF32; |
1310 | ||
1311 | if (to_type == R_X86_64_TLSGD | |
1312 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1313 | || to_type == R_X86_64_TLSDESC_CALL) | |
1314 | { | |
1315 | if (tls_type == GOT_TLS_IE) | |
1316 | new_to_type = R_X86_64_GOTTPOFF; | |
1317 | } | |
1318 | ||
1319 | /* We checked the transition before when we were called from | |
351f65ca | 1320 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1321 | transition which hasn't been checked before. */ |
1322 | check = new_to_type != to_type && from_type == to_type; | |
1323 | to_type = new_to_type; | |
1324 | } | |
1325 | ||
1326 | break; | |
1327 | ||
bffbf940 | 1328 | case R_X86_64_TLSLD: |
0e1862bb | 1329 | if (bfd_link_executable (info)) |
142411ca L |
1330 | to_type = R_X86_64_TPOFF32; |
1331 | break; | |
1332 | ||
1333 | default: | |
1334 | return TRUE; | |
bffbf940 JJ |
1335 | } |
1336 | ||
142411ca L |
1337 | /* Return TRUE if there is no transition. */ |
1338 | if (from_type == to_type) | |
1339 | return TRUE; | |
1340 | ||
1341 | /* Check if the transition can be performed. */ | |
1342 | if (check | |
351f65ca L |
1343 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1344 | symtab_hdr, sym_hashes, | |
1345 | from_type, rel, relend)) | |
142411ca | 1346 | { |
2f629d23 | 1347 | reloc_howto_type *from, *to; |
4c544807 | 1348 | const char *name; |
142411ca | 1349 | |
351f65ca L |
1350 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1351 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1352 | |
f3185997 NC |
1353 | if (from == NULL || to == NULL) |
1354 | return FALSE; | |
1355 | ||
4c544807 L |
1356 | if (h) |
1357 | name = h->root.root.string; | |
1358 | else | |
1359 | { | |
0afcef53 | 1360 | struct elf_x86_link_hash_table *htab; |
4dfe6ac6 | 1361 | |
0afcef53 | 1362 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
1363 | if (htab == NULL) |
1364 | name = "*unknown*"; | |
1365 | else | |
1366 | { | |
1367 | Elf_Internal_Sym *isym; | |
1368 | ||
1369 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1370 | abfd, r_symndx); | |
1371 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1372 | } | |
4c544807 L |
1373 | } |
1374 | ||
4eca0228 | 1375 | _bfd_error_handler |
695344c0 | 1376 | /* xgettext:c-format */ |
2dcf00ce AM |
1377 | (_("%pB: TLS transition from %s to %s against `%s' at %#" PRIx64 |
1378 | " in section `%pA' failed"), | |
1379 | abfd, from->name, to->name, name, (uint64_t) rel->r_offset, sec); | |
142411ca L |
1380 | bfd_set_error (bfd_error_bad_value); |
1381 | return FALSE; | |
1382 | } | |
1383 | ||
1384 | *r_type = to_type; | |
1385 | return TRUE; | |
bffbf940 JJ |
1386 | } |
1387 | ||
c1d11331 L |
1388 | /* Rename some of the generic section flags to better document how they |
1389 | are used here. */ | |
6999821f | 1390 | #define check_relocs_failed sec_flg0 |
338c190a L |
1391 | |
1392 | static bfd_boolean | |
aab921ad L |
1393 | elf_x86_64_need_pic (struct bfd_link_info *info, |
1394 | bfd *input_bfd, asection *sec, | |
338c190a L |
1395 | struct elf_link_hash_entry *h, |
1396 | Elf_Internal_Shdr *symtab_hdr, | |
1397 | Elf_Internal_Sym *isym, | |
1398 | reloc_howto_type *howto) | |
1399 | { | |
1400 | const char *v = ""; | |
1401 | const char *und = ""; | |
1402 | const char *pic = ""; | |
aab921ad | 1403 | const char *object; |
338c190a L |
1404 | |
1405 | const char *name; | |
1406 | if (h) | |
1407 | { | |
1408 | name = h->root.root.string; | |
1409 | switch (ELF_ST_VISIBILITY (h->other)) | |
1410 | { | |
1411 | case STV_HIDDEN: | |
1412 | v = _("hidden symbol "); | |
1413 | break; | |
1414 | case STV_INTERNAL: | |
1415 | v = _("internal symbol "); | |
1416 | break; | |
1417 | case STV_PROTECTED: | |
1418 | v = _("protected symbol "); | |
1419 | break; | |
1420 | default: | |
0afcef53 | 1421 | if (((struct elf_x86_link_hash_entry *) h)->def_protected) |
a5b4ee94 L |
1422 | v = _("protected symbol "); |
1423 | else | |
1424 | v = _("symbol "); | |
338c190a L |
1425 | pic = _("; recompile with -fPIC"); |
1426 | break; | |
1427 | } | |
1428 | ||
1429 | if (!h->def_regular && !h->def_dynamic) | |
1430 | und = _("undefined "); | |
1431 | } | |
1432 | else | |
1433 | { | |
1434 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL); | |
1435 | pic = _("; recompile with -fPIC"); | |
1436 | } | |
1437 | ||
aab921ad L |
1438 | if (bfd_link_dll (info)) |
1439 | object = _("a shared object"); | |
1440 | else if (bfd_link_pie (info)) | |
1441 | object = _("a PIE object"); | |
1442 | else | |
1443 | object = _("a PDE object"); | |
1444 | ||
695344c0 | 1445 | /* xgettext:c-format */ |
871b3ab2 | 1446 | _bfd_error_handler (_("%pB: relocation %s against %s%s`%s' can " |
aab921ad L |
1447 | "not be used when making %s%s"), |
1448 | input_bfd, howto->name, und, v, name, | |
1449 | object, pic); | |
338c190a L |
1450 | bfd_set_error (bfd_error_bad_value); |
1451 | sec->check_relocs_failed = 1; | |
1452 | return FALSE; | |
1453 | } | |
c1d11331 | 1454 | |
c175a657 L |
1455 | /* With the local symbol, foo, we convert |
1456 | mov foo@GOTPCREL(%rip), %reg | |
1457 | to | |
1458 | lea foo(%rip), %reg | |
1459 | and convert | |
1460 | call/jmp *foo@GOTPCREL(%rip) | |
1461 | to | |
1462 | nop call foo/jmp foo nop | |
1463 | When PIC is false, convert | |
1464 | test %reg, foo@GOTPCREL(%rip) | |
1465 | to | |
1466 | test $foo, %reg | |
1467 | and convert | |
1468 | binop foo@GOTPCREL(%rip), %reg | |
1469 | to | |
1470 | binop $foo, %reg | |
1471 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1472 | instructions. */ | |
1473 | ||
1474 | static bfd_boolean | |
8b43e456 | 1475 | elf_x86_64_convert_load_reloc (bfd *abfd, |
c175a657 | 1476 | bfd_byte *contents, |
6999821f | 1477 | unsigned int *r_type_p, |
c175a657 L |
1478 | Elf_Internal_Rela *irel, |
1479 | struct elf_link_hash_entry *h, | |
1480 | bfd_boolean *converted, | |
1481 | struct bfd_link_info *link_info) | |
1482 | { | |
0afcef53 | 1483 | struct elf_x86_link_hash_table *htab; |
c175a657 | 1484 | bfd_boolean is_pic; |
8b43e456 | 1485 | bfd_boolean no_overflow; |
c175a657 L |
1486 | bfd_boolean relocx; |
1487 | bfd_boolean to_reloc_pc32; | |
1488 | asection *tsec; | |
c175a657 L |
1489 | bfd_signed_vma raddend; |
1490 | unsigned int opcode; | |
1491 | unsigned int modrm; | |
6999821f | 1492 | unsigned int r_type = *r_type_p; |
c175a657 | 1493 | unsigned int r_symndx; |
c175a657 L |
1494 | bfd_vma roff = irel->r_offset; |
1495 | ||
1496 | if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2)) | |
1497 | return TRUE; | |
1498 | ||
1499 | raddend = irel->r_addend; | |
1500 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
1501 | if (raddend != -4) | |
1502 | return TRUE; | |
1503 | ||
0afcef53 | 1504 | htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA); |
c175a657 L |
1505 | is_pic = bfd_link_pic (link_info); |
1506 | ||
1507 | relocx = (r_type == R_X86_64_GOTPCRELX | |
1508 | || r_type == R_X86_64_REX_GOTPCRELX); | |
1509 | ||
8b43e456 L |
1510 | /* TRUE if --no-relax is used. */ |
1511 | no_overflow = link_info->disable_target_specific_optimizations > 1; | |
c175a657 L |
1512 | |
1513 | r_symndx = htab->r_sym (irel->r_info); | |
1514 | ||
1515 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1516 | ||
1517 | /* Convert mov to lea since it has been done for a while. */ | |
1518 | if (opcode != 0x8b) | |
1519 | { | |
1520 | /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX | |
1521 | for call, jmp or one of adc, add, and, cmp, or, sbb, sub, | |
1522 | test, xor instructions. */ | |
1523 | if (!relocx) | |
1524 | return TRUE; | |
1525 | } | |
1526 | ||
1527 | /* We convert only to R_X86_64_PC32: | |
1528 | 1. Branch. | |
1529 | 2. R_X86_64_GOTPCREL since we can't modify REX byte. | |
8b43e456 | 1530 | 3. no_overflow is true. |
c175a657 L |
1531 | 4. PIC. |
1532 | */ | |
1533 | to_reloc_pc32 = (opcode == 0xff | |
1534 | || !relocx | |
8b43e456 | 1535 | || no_overflow |
c175a657 L |
1536 | || is_pic); |
1537 | ||
1538 | /* Get the symbol referred to by the reloc. */ | |
1539 | if (h == NULL) | |
1540 | { | |
1541 | Elf_Internal_Sym *isym | |
1542 | = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx); | |
1543 | ||
1544 | /* Skip relocation against undefined symbols. */ | |
1545 | if (isym->st_shndx == SHN_UNDEF) | |
1546 | return TRUE; | |
1547 | ||
c175a657 L |
1548 | if (isym->st_shndx == SHN_ABS) |
1549 | tsec = bfd_abs_section_ptr; | |
1550 | else if (isym->st_shndx == SHN_COMMON) | |
1551 | tsec = bfd_com_section_ptr; | |
1552 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
1553 | tsec = &_bfd_elf_large_com_section; | |
1554 | else | |
1555 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c175a657 L |
1556 | } |
1557 | else | |
1558 | { | |
1559 | /* Undefined weak symbol is only bound locally in executable | |
1560 | and its reference is resolved as 0 without relocation | |
1561 | overflow. We can only perform this optimization for | |
1562 | GOTPCRELX relocations since we need to modify REX byte. | |
1563 | It is OK convert mov with R_X86_64_GOTPCREL to | |
1564 | R_X86_64_PC32. */ | |
0a27fed7 L |
1565 | bfd_boolean local_ref; |
1566 | struct elf_x86_link_hash_entry *eh = elf_x86_hash_entry (h); | |
1567 | ||
1568 | /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */ | |
1569 | local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h); | |
c175a657 | 1570 | if ((relocx || opcode == 0x8b) |
0a27fed7 L |
1571 | && (h->root.type == bfd_link_hash_undefweak |
1572 | && !eh->linker_def | |
1573 | && local_ref)) | |
c175a657 L |
1574 | { |
1575 | if (opcode == 0xff) | |
1576 | { | |
1577 | /* Skip for branch instructions since R_X86_64_PC32 | |
1578 | may overflow. */ | |
8b43e456 | 1579 | if (no_overflow) |
c175a657 L |
1580 | return TRUE; |
1581 | } | |
1582 | else if (relocx) | |
1583 | { | |
1584 | /* For non-branch instructions, we can convert to | |
1585 | R_X86_64_32/R_X86_64_32S since we know if there | |
1586 | is a REX byte. */ | |
1587 | to_reloc_pc32 = FALSE; | |
1588 | } | |
1589 | ||
1590 | /* Since we don't know the current PC when PIC is true, | |
1591 | we can't convert to R_X86_64_PC32. */ | |
1592 | if (to_reloc_pc32 && is_pic) | |
1593 | return TRUE; | |
1594 | ||
1595 | goto convert; | |
1596 | } | |
1597 | /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since | |
1598 | ld.so may use its link-time address. */ | |
cbd0eecf | 1599 | else if (h->start_stop |
0a27fed7 | 1600 | || eh->linker_def |
cbd0eecf L |
1601 | || ((h->def_regular |
1602 | || h->root.type == bfd_link_hash_defined | |
1603 | || h->root.type == bfd_link_hash_defweak) | |
1604 | && h != htab->elf.hdynamic | |
0a27fed7 | 1605 | && local_ref)) |
c175a657 L |
1606 | { |
1607 | /* bfd_link_hash_new or bfd_link_hash_undefined is | |
1608 | set by an assignment in a linker script in | |
cbd0eecf L |
1609 | bfd_elf_record_link_assignment. start_stop is set |
1610 | on __start_SECNAME/__stop_SECNAME which mark section | |
1611 | SECNAME. */ | |
1612 | if (h->start_stop | |
0a27fed7 | 1613 | || eh->linker_def |
cbd0eecf L |
1614 | || (h->def_regular |
1615 | && (h->root.type == bfd_link_hash_new | |
1616 | || h->root.type == bfd_link_hash_undefined | |
1617 | || ((h->root.type == bfd_link_hash_defined | |
1618 | || h->root.type == bfd_link_hash_defweak) | |
1619 | && h->root.u.def.section == bfd_und_section_ptr)))) | |
c175a657 L |
1620 | { |
1621 | /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */ | |
8b43e456 | 1622 | if (no_overflow) |
c175a657 L |
1623 | return TRUE; |
1624 | goto convert; | |
1625 | } | |
1626 | tsec = h->root.u.def.section; | |
c175a657 L |
1627 | } |
1628 | else | |
1629 | return TRUE; | |
1630 | } | |
1631 | ||
2168b268 L |
1632 | /* Don't convert GOTPCREL relocation against large section. */ |
1633 | if (elf_section_data (tsec) != NULL | |
1634 | && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0) | |
1635 | return TRUE; | |
1636 | ||
8b43e456 L |
1637 | /* Skip since R_X86_64_PC32/R_X86_64_32/R_X86_64_32S may overflow. */ |
1638 | if (no_overflow) | |
1639 | return TRUE; | |
c175a657 | 1640 | |
dc089072 | 1641 | convert: |
c175a657 L |
1642 | if (opcode == 0xff) |
1643 | { | |
1644 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
1645 | unsigned int nop; | |
1646 | unsigned int disp; | |
1647 | bfd_vma nop_offset; | |
1648 | ||
1649 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
1650 | R_X86_64_PC32. */ | |
1651 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1652 | if (modrm == 0x25) | |
1653 | { | |
1654 | /* Convert to "jmp foo nop". */ | |
1655 | modrm = 0xe9; | |
1656 | nop = NOP_OPCODE; | |
1657 | nop_offset = irel->r_offset + 3; | |
1658 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1659 | irel->r_offset -= 1; | |
1660 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1661 | } | |
1662 | else | |
1663 | { | |
0afcef53 L |
1664 | struct elf_x86_link_hash_entry *eh |
1665 | = (struct elf_x86_link_hash_entry *) h; | |
e2cbcd91 | 1666 | |
c175a657 L |
1667 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
1668 | is a nop prefix. */ | |
1669 | modrm = 0xe8; | |
e2cbcd91 L |
1670 | /* To support TLS optimization, always use addr32 prefix for |
1671 | "call *__tls_get_addr@GOTPCREL(%rip)". */ | |
1d4af308 | 1672 | if (eh && eh->tls_get_addr) |
c175a657 | 1673 | { |
e2cbcd91 L |
1674 | nop = 0x67; |
1675 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1676 | } |
1677 | else | |
e2cbcd91 L |
1678 | { |
1679 | nop = link_info->call_nop_byte; | |
1680 | if (link_info->call_nop_as_suffix) | |
1681 | { | |
1682 | nop_offset = irel->r_offset + 3; | |
1683 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1684 | irel->r_offset -= 1; | |
1685 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1686 | } | |
1687 | else | |
1688 | nop_offset = irel->r_offset - 2; | |
1689 | } | |
c175a657 L |
1690 | } |
1691 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1692 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1693 | r_type = R_X86_64_PC32; | |
1694 | } | |
1695 | else | |
1696 | { | |
1697 | unsigned int rex; | |
1698 | unsigned int rex_mask = REX_R; | |
1699 | ||
1700 | if (r_type == R_X86_64_REX_GOTPCRELX) | |
1701 | rex = bfd_get_8 (abfd, contents + roff - 3); | |
1702 | else | |
1703 | rex = 0; | |
1704 | ||
1705 | if (opcode == 0x8b) | |
1706 | { | |
1707 | if (to_reloc_pc32) | |
1708 | { | |
1709 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1710 | "lea foo(%rip), %reg". */ | |
1711 | opcode = 0x8d; | |
1712 | r_type = R_X86_64_PC32; | |
1713 | } | |
1714 | else | |
1715 | { | |
1716 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1717 | "mov $foo, %reg". */ | |
1718 | opcode = 0xc7; | |
1719 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1720 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1721 | if ((rex & REX_W) != 0 | |
1722 | && ABI_64_P (link_info->output_bfd)) | |
1723 | { | |
1724 | /* Keep the REX_W bit in REX byte for LP64. */ | |
1725 | r_type = R_X86_64_32S; | |
1726 | goto rewrite_modrm_rex; | |
1727 | } | |
1728 | else | |
1729 | { | |
1730 | /* If the REX_W bit in REX byte isn't needed, | |
1731 | use R_X86_64_32 and clear the W bit to avoid | |
1732 | sign-extend imm32 to imm64. */ | |
1733 | r_type = R_X86_64_32; | |
1734 | /* Clear the W bit in REX byte. */ | |
1735 | rex_mask |= REX_W; | |
1736 | goto rewrite_modrm_rex; | |
1737 | } | |
1738 | } | |
1739 | } | |
1740 | else | |
1741 | { | |
1742 | /* R_X86_64_PC32 isn't supported. */ | |
1743 | if (to_reloc_pc32) | |
1744 | return TRUE; | |
1745 | ||
1746 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1747 | if (opcode == 0x85) | |
1748 | { | |
1749 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
1750 | "test $foo, %reg". */ | |
1751 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1752 | opcode = 0xf7; | |
1753 | } | |
1754 | else | |
1755 | { | |
1756 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
1757 | "binop $foo, %reg". */ | |
1758 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
1759 | opcode = 0x81; | |
1760 | } | |
1761 | ||
1762 | /* Use R_X86_64_32 with 32-bit operand to avoid relocation | |
1763 | overflow when sign-extending imm32 to imm64. */ | |
1764 | r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32; | |
1765 | ||
1766 | rewrite_modrm_rex: | |
1767 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1768 | ||
1769 | if (rex) | |
1770 | { | |
1771 | /* Move the R bit to the B bit in REX byte. */ | |
1772 | rex = (rex & ~rex_mask) | (rex & REX_R) >> 2; | |
1773 | bfd_put_8 (abfd, rex, contents + roff - 3); | |
1774 | } | |
1775 | ||
1776 | /* No addend for R_X86_64_32/R_X86_64_32S relocations. */ | |
1777 | irel->r_addend = 0; | |
1778 | } | |
1779 | ||
1780 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1781 | } | |
1782 | ||
6999821f | 1783 | *r_type_p = r_type; |
78984959 L |
1784 | irel->r_info = htab->r_info (r_symndx, |
1785 | r_type | R_X86_64_converted_reloc_bit); | |
c175a657 L |
1786 | |
1787 | *converted = TRUE; | |
1788 | ||
1789 | return TRUE; | |
1790 | } | |
1791 | ||
70256ad8 | 1792 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1793 | calculate needed space in the global offset table, procedure |
1794 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1795 | |
b34976b6 | 1796 | static bfd_boolean |
351f65ca L |
1797 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1798 | asection *sec, | |
1799 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1800 | { |
0afcef53 | 1801 | struct elf_x86_link_hash_table *htab; |
70256ad8 AJ |
1802 | Elf_Internal_Shdr *symtab_hdr; |
1803 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1804 | const Elf_Internal_Rela *rel; |
1805 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 1806 | asection *sreloc; |
bedfd056 | 1807 | bfd_byte *contents; |
5e5e02ae | 1808 | bfd_boolean converted; |
70256ad8 | 1809 | |
0e1862bb | 1810 | if (bfd_link_relocatable (info)) |
b34976b6 | 1811 | return TRUE; |
70256ad8 | 1812 | |
081b1afe L |
1813 | /* Don't do anything special with non-loaded, non-alloced sections. |
1814 | In particular, any relocs in such sections should not affect GOT | |
1815 | and PLT reference counting (ie. we don't allow them to create GOT | |
1816 | or PLT entries), there's no possibility or desire to optimize TLS | |
1817 | relocs, and there's not much point in propagating relocs to shared | |
1818 | libs that the dynamic linker won't relocate. */ | |
1819 | if ((sec->flags & SEC_ALLOC) == 0) | |
1820 | return TRUE; | |
1821 | ||
0afcef53 | 1822 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 | 1823 | if (htab == NULL) |
afd9acee L |
1824 | { |
1825 | sec->check_relocs_failed = 1; | |
1826 | return FALSE; | |
1827 | } | |
4dfe6ac6 | 1828 | |
fe53b4a4 L |
1829 | BFD_ASSERT (is_x86_elf (abfd, htab)); |
1830 | ||
bedfd056 L |
1831 | /* Get the section contents. */ |
1832 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1833 | contents = elf_section_data (sec)->this_hdr.contents; | |
1834 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1835 | { | |
1836 | sec->check_relocs_failed = 1; | |
1837 | return FALSE; | |
1838 | } | |
1839 | ||
0ffa91dd | 1840 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1841 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1842 | |
5e5e02ae L |
1843 | converted = FALSE; |
1844 | ||
c434dee6 | 1845 | sreloc = NULL; |
cbe950e9 | 1846 | |
70256ad8 AJ |
1847 | rel_end = relocs + sec->reloc_count; |
1848 | for (rel = relocs; rel < rel_end; rel++) | |
1849 | { | |
bffbf940 | 1850 | unsigned int r_type; |
d42c267e | 1851 | unsigned int r_symndx; |
70256ad8 | 1852 | struct elf_link_hash_entry *h; |
0afcef53 | 1853 | struct elf_x86_link_hash_entry *eh; |
4c544807 L |
1854 | Elf_Internal_Sym *isym; |
1855 | const char *name; | |
06a6a421 | 1856 | bfd_boolean size_reloc; |
6999821f | 1857 | bfd_boolean converted_reloc; |
70256ad8 | 1858 | |
351f65ca L |
1859 | r_symndx = htab->r_sym (rel->r_info); |
1860 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1861 | |
1862 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1863 | { | |
695344c0 | 1864 | /* xgettext:c-format */ |
871b3ab2 | 1865 | _bfd_error_handler (_("%pB: bad symbol index: %d"), |
4eca0228 | 1866 | abfd, r_symndx); |
afd9acee | 1867 | goto error_return; |
c434dee6 AJ |
1868 | } |
1869 | ||
70256ad8 | 1870 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1871 | { |
1872 | /* A local symbol. */ | |
c2e61a4e L |
1873 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1874 | abfd, r_symndx); | |
1875 | if (isym == NULL) | |
afd9acee | 1876 | goto error_return; |
c25bc9fc L |
1877 | |
1878 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1879 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1880 | { |
0afcef53 L |
1881 | h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, |
1882 | TRUE); | |
c25bc9fc | 1883 | if (h == NULL) |
afd9acee | 1884 | goto error_return; |
6bbec505 | 1885 | |
c25bc9fc | 1886 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
1887 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
1888 | isym, NULL); | |
c25bc9fc L |
1889 | h->type = STT_GNU_IFUNC; |
1890 | h->def_regular = 1; | |
1891 | h->ref_regular = 1; | |
1892 | h->forced_local = 1; | |
1893 | h->root.type = bfd_link_hash_defined; | |
1894 | } | |
1895 | else | |
1896 | h = NULL; | |
1897 | } | |
70256ad8 | 1898 | else |
71cb9464 | 1899 | { |
4c544807 | 1900 | isym = NULL; |
71cb9464 L |
1901 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1902 | while (h->root.type == bfd_link_hash_indirect | |
1903 | || h->root.type == bfd_link_hash_warning) | |
1904 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1905 | } |
cbe950e9 | 1906 | |
d1534d16 L |
1907 | /* Check invalid x32 relocations. */ |
1908 | if (!ABI_64_P (abfd)) | |
1909 | switch (r_type) | |
1910 | { | |
1911 | default: | |
1912 | break; | |
1913 | ||
d1534d16 L |
1914 | case R_X86_64_DTPOFF64: |
1915 | case R_X86_64_TPOFF64: | |
1916 | case R_X86_64_PC64: | |
1917 | case R_X86_64_GOTOFF64: | |
1918 | case R_X86_64_GOT64: | |
1919 | case R_X86_64_GOTPCREL64: | |
1920 | case R_X86_64_GOTPC64: | |
1921 | case R_X86_64_GOTPLT64: | |
1922 | case R_X86_64_PLTOFF64: | |
1923 | { | |
1924 | if (h) | |
1925 | name = h->root.root.string; | |
1926 | else | |
1927 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1928 | NULL); | |
4eca0228 | 1929 | _bfd_error_handler |
695344c0 | 1930 | /* xgettext:c-format */ |
871b3ab2 | 1931 | (_("%pB: relocation %s against symbol `%s' isn't " |
d1534d16 L |
1932 | "supported in x32 mode"), abfd, |
1933 | x86_64_elf_howto_table[r_type].name, name); | |
1934 | bfd_set_error (bfd_error_bad_value); | |
afd9acee | 1935 | goto error_return; |
d1534d16 L |
1936 | } |
1937 | break; | |
1938 | } | |
1939 | ||
c25bc9fc L |
1940 | if (h != NULL) |
1941 | { | |
ad1e85de L |
1942 | /* It is referenced by a non-shared object. */ |
1943 | h->ref_regular = 1; | |
13a2df29 L |
1944 | |
1945 | if (h->type == STT_GNU_IFUNC) | |
1946 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
1947 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 1948 | } |
70256ad8 | 1949 | |
6999821f L |
1950 | converted_reloc = FALSE; |
1951 | if ((r_type == R_X86_64_GOTPCREL | |
1952 | || r_type == R_X86_64_GOTPCRELX | |
1953 | || r_type == R_X86_64_REX_GOTPCRELX) | |
1954 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
1955 | { | |
1956 | Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel; | |
1957 | if (!elf_x86_64_convert_load_reloc (abfd, contents, &r_type, | |
1958 | irel, h, &converted_reloc, | |
1959 | info)) | |
1960 | goto error_return; | |
5e5e02ae L |
1961 | |
1962 | if (converted_reloc) | |
1963 | converted = TRUE; | |
6999821f L |
1964 | } |
1965 | ||
bedfd056 | 1966 | if (! elf_x86_64_tls_transition (info, abfd, sec, contents, |
351f65ca L |
1967 | symtab_hdr, sym_hashes, |
1968 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 1969 | rel, rel_end, h, r_symndx, FALSE)) |
afd9acee | 1970 | goto error_return; |
142411ca | 1971 | |
cd048363 L |
1972 | /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */ |
1973 | if (h == htab->elf.hgot) | |
1974 | htab->got_referenced = TRUE; | |
1975 | ||
0afcef53 | 1976 | eh = (struct elf_x86_link_hash_entry *) h; |
bffbf940 | 1977 | switch (r_type) |
70256ad8 | 1978 | { |
bffbf940 | 1979 | case R_X86_64_TLSLD: |
0f09b4d8 | 1980 | htab->tls_ld_or_ldm_got.refcount = 1; |
bffbf940 JJ |
1981 | goto create_got; |
1982 | ||
1983 | case R_X86_64_TPOFF32: | |
0e1862bb | 1984 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
aab921ad | 1985 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 1986 | &x86_64_elf_howto_table[r_type]); |
aec6b87e | 1987 | if (eh != NULL) |
98b273dc | 1988 | eh->zero_undefweak &= 0x2; |
bffbf940 | 1989 | break; |
c434dee6 | 1990 | |
bffbf940 | 1991 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1992 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
1993 | info->flags |= DF_STATIC_TLS; |
1994 | /* Fall through */ | |
70256ad8 | 1995 | |
bffbf940 JJ |
1996 | case R_X86_64_GOT32: |
1997 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
1998 | case R_X86_64_GOTPCRELX: |
1999 | case R_X86_64_REX_GOTPCRELX: | |
bffbf940 | 2000 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
2001 | case R_X86_64_GOT64: |
2002 | case R_X86_64_GOTPCREL64: | |
2003 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
2004 | case R_X86_64_GOTPC32_TLSDESC: |
2005 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
2006 | /* This symbol requires a global offset table entry. */ |
2007 | { | |
2008 | int tls_type, old_tls_type; | |
2009 | ||
2010 | switch (r_type) | |
2011 | { | |
2012 | default: tls_type = GOT_NORMAL; break; | |
2013 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
2014 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
2015 | case R_X86_64_GOTPC32_TLSDESC: |
2016 | case R_X86_64_TLSDESC_CALL: | |
2017 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
2018 | } |
2019 | ||
2020 | if (h != NULL) | |
2021 | { | |
0f09b4d8 | 2022 | h->got.refcount = 1; |
aec6b87e | 2023 | old_tls_type = eh->tls_type; |
bffbf940 JJ |
2024 | } |
2025 | else | |
2026 | { | |
2027 | bfd_signed_vma *local_got_refcounts; | |
2028 | ||
2029 | /* This is a global offset table entry for a local symbol. */ | |
2030 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2031 | if (local_got_refcounts == NULL) | |
2032 | { | |
2033 | bfd_size_type size; | |
2034 | ||
2035 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
2036 | size *= sizeof (bfd_signed_vma) |
2037 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
2038 | local_got_refcounts = ((bfd_signed_vma *) |
2039 | bfd_zalloc (abfd, size)); | |
2040 | if (local_got_refcounts == NULL) | |
afd9acee | 2041 | goto error_return; |
bffbf940 | 2042 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
0afcef53 | 2043 | elf_x86_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 2044 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
0afcef53 | 2045 | elf_x86_local_got_tls_type (abfd) |
67a4f2b7 | 2046 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 | 2047 | } |
0f09b4d8 | 2048 | local_got_refcounts[r_symndx] = 1; |
bffbf940 | 2049 | old_tls_type |
0afcef53 | 2050 | = elf_x86_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
2051 | } |
2052 | ||
2053 | /* If a TLS symbol is accessed using IE at least once, | |
2054 | there is no point to use dynamic model for it. */ | |
2055 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
2056 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
2057 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 2058 | { |
67a4f2b7 | 2059 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 2060 | tls_type = old_tls_type; |
67a4f2b7 AO |
2061 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2062 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2063 | tls_type |= old_tls_type; | |
bffbf940 JJ |
2064 | else |
2065 | { | |
09a24cbf | 2066 | if (h) |
4c544807 L |
2067 | name = h->root.root.string; |
2068 | else | |
2069 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
2070 | isym, NULL); | |
4eca0228 | 2071 | _bfd_error_handler |
695344c0 | 2072 | /* xgettext:c-format */ |
871b3ab2 | 2073 | (_("%pB: '%s' accessed both as normal and" |
63a5468a | 2074 | " thread local symbol"), |
4c544807 | 2075 | abfd, name); |
68c4a57e | 2076 | bfd_set_error (bfd_error_bad_value); |
afd9acee | 2077 | goto error_return; |
bffbf940 JJ |
2078 | } |
2079 | } | |
2080 | ||
2081 | if (old_tls_type != tls_type) | |
2082 | { | |
aec6b87e L |
2083 | if (eh != NULL) |
2084 | eh->tls_type = tls_type; | |
bffbf940 | 2085 | else |
0afcef53 | 2086 | elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
2087 | } |
2088 | } | |
c434dee6 AJ |
2089 | /* Fall through */ |
2090 | ||
d6ab8113 JB |
2091 | case R_X86_64_GOTOFF64: |
2092 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2093 | case R_X86_64_GOTPC64: |
bffbf940 | 2094 | create_got: |
aec6b87e | 2095 | if (eh != NULL) |
98b273dc | 2096 | eh->zero_undefweak &= 0x2; |
70256ad8 AJ |
2097 | break; |
2098 | ||
2099 | case R_X86_64_PLT32: | |
c3320543 | 2100 | case R_X86_64_PLT32_BND: |
70256ad8 | 2101 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
2102 | actually build the entry in adjust_dynamic_symbol, |
2103 | because this might be a case of linking PIC code which is | |
2104 | never referenced by a dynamic object, in which case we | |
2105 | don't need to generate a procedure linkage table entry | |
2106 | after all. */ | |
70256ad8 AJ |
2107 | |
2108 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 2109 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
2110 | if (h == NULL) |
2111 | continue; | |
2112 | ||
98b273dc | 2113 | eh->zero_undefweak &= 0x2; |
f5385ebf | 2114 | h->needs_plt = 1; |
79b0c981 | 2115 | h->plt.refcount = 1; |
70256ad8 AJ |
2116 | break; |
2117 | ||
7b81dfbb AJ |
2118 | case R_X86_64_PLTOFF64: |
2119 | /* This tries to form the 'address' of a function relative | |
2120 | to GOT. For global symbols we need a PLT entry. */ | |
2121 | if (h != NULL) | |
2122 | { | |
2123 | h->needs_plt = 1; | |
79b0c981 | 2124 | h->plt.refcount = 1; |
7b81dfbb AJ |
2125 | } |
2126 | goto create_got; | |
2127 | ||
6a3e1bae L |
2128 | case R_X86_64_SIZE32: |
2129 | case R_X86_64_SIZE64: | |
06a6a421 | 2130 | size_reloc = TRUE; |
6a3e1bae L |
2131 | goto do_size; |
2132 | ||
248775ba L |
2133 | case R_X86_64_32: |
2134 | if (!ABI_64_P (abfd)) | |
2135 | goto pointer; | |
1a0670f3 | 2136 | /* Fall through. */ |
cc78d0af AJ |
2137 | case R_X86_64_8: |
2138 | case R_X86_64_16: | |
70256ad8 | 2139 | case R_X86_64_32S: |
338c190a L |
2140 | /* Check relocation overflow as these relocs may lead to |
2141 | run-time relocation overflow. Don't error out for | |
1b71fb54 | 2142 | sections we don't care about, such as debug sections or |
338c190a | 2143 | when relocation overflow check is disabled. */ |
4c10bbaa | 2144 | if (!info->no_reloc_overflow_check |
6999821f | 2145 | && !converted_reloc |
338c190a L |
2146 | && (bfd_link_pic (info) |
2147 | || (bfd_link_executable (info) | |
2148 | && h != NULL | |
2149 | && !h->def_regular | |
2150 | && h->def_dynamic | |
081b1afe | 2151 | && (sec->flags & SEC_READONLY) == 0))) |
aab921ad | 2152 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2153 | &x86_64_elf_howto_table[r_type]); |
1b71fb54 AJ |
2154 | /* Fall through. */ |
2155 | ||
c434dee6 AJ |
2156 | case R_X86_64_PC8: |
2157 | case R_X86_64_PC16: | |
70256ad8 | 2158 | case R_X86_64_PC32: |
c3320543 | 2159 | case R_X86_64_PC32_BND: |
d6ab8113 | 2160 | case R_X86_64_PC64: |
1b71fb54 | 2161 | case R_X86_64_64: |
248775ba | 2162 | pointer: |
aec6b87e | 2163 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
98b273dc | 2164 | eh->zero_undefweak |= 0x2; |
bf52d7c7 L |
2165 | /* We are called after all symbols have been resolved. Only |
2166 | relocation against STT_GNU_IFUNC symbol must go through | |
2167 | PLT. */ | |
d1ed1c7d L |
2168 | if (h != NULL |
2169 | && (bfd_link_executable (info) | |
bf52d7c7 | 2170 | || h->type == STT_GNU_IFUNC)) |
c434dee6 | 2171 | { |
79b0c981 | 2172 | bfd_boolean func_pointer_ref = FALSE; |
233cc9c1 | 2173 | |
5db4f0d3 L |
2174 | if (r_type == R_X86_64_PC32) |
2175 | { | |
2176 | /* Since something like ".long foo - ." may be used | |
2177 | as pointer, make sure that PLT is used if foo is | |
2178 | a function defined in a shared library. */ | |
2179 | if ((sec->flags & SEC_CODE) == 0) | |
451875b4 L |
2180 | { |
2181 | h->pointer_equality_needed = 1; | |
2182 | if (bfd_link_pie (info) | |
2183 | && h->type == STT_FUNC | |
2184 | && !h->def_regular | |
2185 | && h->def_dynamic) | |
2186 | { | |
2187 | h->needs_plt = 1; | |
2188 | h->plt.refcount = 1; | |
2189 | } | |
2190 | } | |
5db4f0d3 L |
2191 | } |
2192 | else if (r_type != R_X86_64_PC32_BND | |
2193 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
2194 | { |
2195 | h->pointer_equality_needed = 1; | |
2196 | /* At run-time, R_X86_64_64 can be resolved for both | |
2197 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
2198 | can only be resolved for x32. */ | |
2199 | if ((sec->flags & SEC_READONLY) == 0 | |
2200 | && (r_type == R_X86_64_64 | |
2201 | || (!ABI_64_P (abfd) | |
2202 | && (r_type == R_X86_64_32 | |
2203 | || r_type == R_X86_64_32S)))) | |
79b0c981 L |
2204 | func_pointer_ref = TRUE; |
2205 | } | |
2206 | ||
2207 | if (!func_pointer_ref) | |
2208 | { | |
2209 | /* If this reloc is in a read-only section, we might | |
2210 | need a copy reloc. We can't check reliably at this | |
2211 | stage whether the section is read-only, as input | |
2212 | sections have not yet been mapped to output sections. | |
2213 | Tentatively set the flag for now, and correct in | |
2214 | adjust_dynamic_symbol. */ | |
2215 | h->non_got_ref = 1; | |
2216 | ||
2217 | /* We may need a .plt entry if the symbol is a function | |
2218 | defined in a shared lib or is a function referenced | |
2219 | from the code or read-only section. */ | |
2220 | if (!h->def_regular | |
2221 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
2222 | h->plt.refcount = 1; | |
04ebc307 | 2223 | } |
c434dee6 | 2224 | } |
70256ad8 | 2225 | |
06a6a421 | 2226 | size_reloc = FALSE; |
6a3e1bae | 2227 | do_size: |
451875b4 | 2228 | if (NEED_DYNAMIC_RELOCATION_P (info, TRUE, h, sec, r_type, |
daf1c414 | 2229 | htab->pointer_r_type)) |
70256ad8 | 2230 | { |
e03a8ed8 L |
2231 | struct elf_dyn_relocs *p; |
2232 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2233 | |
2234 | /* We must copy these reloc types into the output file. | |
2235 | Create a reloc section in dynobj and make room for | |
2236 | this reloc. */ | |
70256ad8 AJ |
2237 | if (sreloc == NULL) |
2238 | { | |
83bac4b0 | 2239 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
2240 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
2241 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 2242 | |
70256ad8 | 2243 | if (sreloc == NULL) |
afd9acee | 2244 | goto error_return; |
70256ad8 AJ |
2245 | } |
2246 | ||
c434dee6 AJ |
2247 | /* If this is a global symbol, we count the number of |
2248 | relocations we need for this symbol. */ | |
2249 | if (h != NULL) | |
aec6b87e | 2250 | head = &eh->dyn_relocs; |
c434dee6 AJ |
2251 | else |
2252 | { | |
2253 | /* Track dynamic relocs needed for local syms too. | |
2254 | We really need local syms available to do this | |
2255 | easily. Oh well. */ | |
c434dee6 | 2256 | asection *s; |
87d72d41 | 2257 | void **vpp; |
87d72d41 AM |
2258 | |
2259 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2260 | abfd, r_symndx); | |
2261 | if (isym == NULL) | |
afd9acee | 2262 | goto error_return; |
87d72d41 AM |
2263 | |
2264 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2265 | if (s == NULL) |
87d72d41 | 2266 | s = sec; |
70256ad8 | 2267 | |
e81d3500 DD |
2268 | /* Beware of type punned pointers vs strict aliasing |
2269 | rules. */ | |
2270 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2271 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2272 | } |
70256ad8 | 2273 | |
c434dee6 AJ |
2274 | p = *head; |
2275 | if (p == NULL || p->sec != sec) | |
2276 | { | |
2277 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 2278 | |
e03a8ed8 | 2279 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2280 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2281 | if (p == NULL) |
afd9acee | 2282 | goto error_return; |
c434dee6 AJ |
2283 | p->next = *head; |
2284 | *head = p; | |
2285 | p->sec = sec; | |
2286 | p->count = 0; | |
2287 | p->pc_count = 0; | |
70256ad8 | 2288 | } |
c434dee6 AJ |
2289 | |
2290 | p->count += 1; | |
06a6a421 | 2291 | /* Count size relocation as PC-relative relocation. */ |
daf1c414 | 2292 | if (X86_PCREL_TYPE_P (r_type) || size_reloc) |
c434dee6 | 2293 | p->pc_count += 1; |
70256ad8 AJ |
2294 | } |
2295 | break; | |
fe4770f4 AJ |
2296 | |
2297 | /* This relocation describes the C++ object vtable hierarchy. | |
2298 | Reconstruct it for later use during GC. */ | |
2299 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2300 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
afd9acee | 2301 | goto error_return; |
fe4770f4 AJ |
2302 | break; |
2303 | ||
2304 | /* This relocation describes which C++ vtable entries are actually | |
2305 | used. Record for later use during GC. */ | |
2306 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
2307 | BFD_ASSERT (h != NULL); |
2308 | if (h != NULL | |
2309 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
afd9acee | 2310 | goto error_return; |
fe4770f4 | 2311 | break; |
c434dee6 AJ |
2312 | |
2313 | default: | |
2314 | break; | |
70256ad8 AJ |
2315 | } |
2316 | } | |
2317 | ||
bedfd056 L |
2318 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2319 | { | |
5e5e02ae | 2320 | if (!converted && !info->keep_memory) |
bedfd056 L |
2321 | free (contents); |
2322 | else | |
2323 | { | |
5e5e02ae L |
2324 | /* Cache the section contents for elf_link_input_bfd if any |
2325 | load is converted or --no-keep-memory isn't used. */ | |
bedfd056 L |
2326 | elf_section_data (sec)->this_hdr.contents = contents; |
2327 | } | |
2328 | } | |
2329 | ||
5e5e02ae L |
2330 | /* Cache relocations if any load is converted. */ |
2331 | if (elf_section_data (sec)->relocs != relocs && converted) | |
2332 | elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs; | |
2333 | ||
b34976b6 | 2334 | return TRUE; |
afd9acee L |
2335 | |
2336 | error_return: | |
bedfd056 L |
2337 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2338 | free (contents); | |
afd9acee L |
2339 | sec->check_relocs_failed = 1; |
2340 | return FALSE; | |
70256ad8 AJ |
2341 | } |
2342 | ||
bffbf940 JJ |
2343 | /* Return the relocation value for @tpoff relocation |
2344 | if STT_TLS virtual address is ADDRESS. */ | |
2345 | ||
2346 | static bfd_vma | |
351f65ca | 2347 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 2348 | { |
e1918d23 | 2349 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
2350 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
2351 | bfd_vma static_tls_size; | |
bffbf940 JJ |
2352 | |
2353 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 2354 | if (htab->tls_sec == NULL) |
bffbf940 | 2355 | return 0; |
7dc98aea RO |
2356 | |
2357 | /* Consider special static TLS alignment requirements. */ | |
2358 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
2359 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
2360 | } |
2361 | ||
8d88c4ca NC |
2362 | /* Relocate an x86_64 ELF section. */ |
2363 | ||
b34976b6 | 2364 | static bfd_boolean |
351f65ca L |
2365 | elf_x86_64_relocate_section (bfd *output_bfd, |
2366 | struct bfd_link_info *info, | |
2367 | bfd *input_bfd, | |
2368 | asection *input_section, | |
2369 | bfd_byte *contents, | |
2370 | Elf_Internal_Rela *relocs, | |
2371 | Elf_Internal_Sym *local_syms, | |
2372 | asection **local_sections) | |
8d88c4ca | 2373 | { |
0afcef53 | 2374 | struct elf_x86_link_hash_table *htab; |
8d88c4ca NC |
2375 | Elf_Internal_Shdr *symtab_hdr; |
2376 | struct elf_link_hash_entry **sym_hashes; | |
2377 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2378 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 2379 | Elf_Internal_Rela *rel; |
60f2e42e | 2380 | Elf_Internal_Rela *wrel; |
8d88c4ca | 2381 | Elf_Internal_Rela *relend; |
38b12349 | 2382 | unsigned int plt_entry_size; |
8d88c4ca | 2383 | |
338c190a L |
2384 | /* Skip if check_relocs failed. */ |
2385 | if (input_section->check_relocs_failed) | |
2386 | return FALSE; | |
2387 | ||
0afcef53 | 2388 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
2389 | if (htab == NULL) |
2390 | return FALSE; | |
fe53b4a4 | 2391 | |
7af5d5c4 AM |
2392 | if (!is_x86_elf (input_bfd, htab)) |
2393 | { | |
2394 | bfd_set_error (bfd_error_wrong_format); | |
2395 | return FALSE; | |
2396 | } | |
fe53b4a4 | 2397 | |
765e526c | 2398 | plt_entry_size = htab->plt.plt_entry_size; |
0ffa91dd | 2399 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
2400 | sym_hashes = elf_sym_hashes (input_bfd); |
2401 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
0afcef53 | 2402 | local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 2403 | |
0afcef53 | 2404 | _bfd_x86_elf_set_tls_module_base (info); |
9f03412a | 2405 | |
60f2e42e | 2406 | rel = wrel = relocs; |
8d88c4ca | 2407 | relend = relocs + input_section->reloc_count; |
60f2e42e | 2408 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 2409 | { |
419414ea | 2410 | unsigned int r_type, r_type_tls; |
8d88c4ca NC |
2411 | reloc_howto_type *howto; |
2412 | unsigned long r_symndx; | |
2413 | struct elf_link_hash_entry *h; | |
0afcef53 | 2414 | struct elf_x86_link_hash_entry *eh; |
8d88c4ca NC |
2415 | Elf_Internal_Sym *sym; |
2416 | asection *sec; | |
0ff2b86e | 2417 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 2418 | bfd_vma relocation; |
b34976b6 | 2419 | bfd_boolean unresolved_reloc; |
8d88c4ca | 2420 | bfd_reloc_status_type r; |
bffbf940 | 2421 | int tls_type; |
0ff2b86e | 2422 | asection *base_got, *resolved_plt; |
1788fc08 | 2423 | bfd_vma st_size; |
aec6b87e | 2424 | bfd_boolean resolved_to_zero; |
9e9821dd | 2425 | bfd_boolean relative_reloc; |
78984959 | 2426 | bfd_boolean converted_reloc; |
aebcc8ff | 2427 | bfd_boolean need_copy_reloc_in_pie; |
8d88c4ca | 2428 | |
351f65ca | 2429 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
2430 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
2431 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
2432 | { |
2433 | if (wrel != rel) | |
2434 | *wrel = *rel; | |
2435 | continue; | |
2436 | } | |
8d88c4ca | 2437 | |
b638b5d5 | 2438 | r_symndx = htab->r_sym (rel->r_info); |
78984959 | 2439 | converted_reloc = (r_type & R_X86_64_converted_reloc_bit) != 0; |
b638b5d5 L |
2440 | if (converted_reloc) |
2441 | { | |
2442 | r_type &= ~R_X86_64_converted_reloc_bit; | |
2443 | rel->r_info = htab->r_info (r_symndx, r_type); | |
2444 | } | |
78984959 | 2445 | |
9911c0fc | 2446 | if (r_type >= (int) R_X86_64_standard) |
47aeb64c | 2447 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
8d88c4ca | 2448 | |
d7921315 | 2449 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 2450 | || ABI_64_P (output_bfd)) |
d7921315 L |
2451 | howto = x86_64_elf_howto_table + r_type; |
2452 | else | |
2453 | howto = (x86_64_elf_howto_table | |
2454 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
8d88c4ca NC |
2455 | h = NULL; |
2456 | sym = NULL; | |
2457 | sec = NULL; | |
b34976b6 | 2458 | unresolved_reloc = FALSE; |
8d88c4ca | 2459 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
2460 | { |
2461 | sym = local_syms + r_symndx; | |
2462 | sec = local_sections[r_symndx]; | |
c434dee6 | 2463 | |
c25bc9fc L |
2464 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
2465 | &sec, rel); | |
1788fc08 | 2466 | st_size = sym->st_size; |
c25bc9fc L |
2467 | |
2468 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 2469 | if (!bfd_link_relocatable (info) |
351f65ca | 2470 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 2471 | { |
0afcef53 L |
2472 | h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, |
2473 | rel, FALSE); | |
c25bc9fc L |
2474 | if (h == NULL) |
2475 | abort (); | |
2476 | ||
eed180f8 | 2477 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
2478 | h->root.u.def.value = sym->st_value; |
2479 | h->root.u.def.section = sec; | |
2480 | } | |
8da6118f | 2481 | } |
8d88c4ca | 2482 | else |
8da6118f | 2483 | { |
c9736ba0 | 2484 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 2485 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
c434dee6 | 2486 | |
b2a8e766 AM |
2487 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2488 | r_symndx, symtab_hdr, sym_hashes, | |
2489 | h, sec, relocation, | |
62d887d4 | 2490 | unresolved_reloc, warned, ignored); |
1788fc08 | 2491 | st_size = h->size; |
8da6118f | 2492 | } |
ab96bf03 | 2493 | |
dbaa2011 | 2494 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
2495 | { |
2496 | _bfd_clear_contents (howto, input_bfd, input_section, | |
0930cb30 | 2497 | contents, rel->r_offset); |
60f2e42e L |
2498 | wrel->r_offset = rel->r_offset; |
2499 | wrel->r_info = 0; | |
2500 | wrel->r_addend = 0; | |
2501 | ||
2502 | /* For ld -r, remove relocations in debug sections against | |
2503 | sections defined in discarded sections. Not done for | |
2504 | eh_frame editing code expects to be present. */ | |
2505 | if (bfd_link_relocatable (info) | |
2506 | && (input_section->flags & SEC_DEBUGGING)) | |
2507 | wrel--; | |
2508 | ||
2509 | continue; | |
2510 | } | |
ab96bf03 | 2511 | |
0e1862bb | 2512 | if (bfd_link_relocatable (info)) |
2d5da473 L |
2513 | { |
2514 | if (wrel != rel) | |
2515 | *wrel = *rel; | |
2516 | continue; | |
2517 | } | |
ab96bf03 | 2518 | |
1788fc08 | 2519 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 2520 | { |
1788fc08 L |
2521 | if (r_type == R_X86_64_64) |
2522 | { | |
2523 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
2524 | zero-extend it to 64bit if addend is zero. */ | |
2525 | r_type = R_X86_64_32; | |
2526 | memset (contents + rel->r_offset + 4, 0, 4); | |
2527 | } | |
2528 | else if (r_type == R_X86_64_SIZE64) | |
2529 | { | |
2530 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
2531 | zero-extend it to 64bit if addend is zero. */ | |
2532 | r_type = R_X86_64_SIZE32; | |
2533 | memset (contents + rel->r_offset + 4, 0, 4); | |
2534 | } | |
64d25c44 L |
2535 | } |
2536 | ||
0afcef53 | 2537 | eh = (struct elf_x86_link_hash_entry *) h; |
0ff2b86e | 2538 | |
cbe950e9 L |
2539 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
2540 | it here if it is defined in a non-shared object. */ | |
2541 | if (h != NULL | |
2542 | && h->type == STT_GNU_IFUNC | |
2543 | && h->def_regular) | |
2544 | { | |
cbe950e9 | 2545 | bfd_vma plt_index; |
4c544807 | 2546 | const char *name; |
cbe950e9 | 2547 | |
97dc35c8 L |
2548 | if ((input_section->flags & SEC_ALLOC) == 0) |
2549 | { | |
347a8774 L |
2550 | /* If this is a SHT_NOTE section without SHF_ALLOC, treat |
2551 | STT_GNU_IFUNC symbol as STT_FUNC. */ | |
2552 | if (elf_section_type (input_section) == SHT_NOTE) | |
2553 | goto skip_ifunc; | |
97dc35c8 L |
2554 | /* Dynamic relocs are not propagated for SEC_DEBUGGING |
2555 | sections because such sections are not SEC_ALLOC and | |
2556 | thus ld.so will not process them. */ | |
2557 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 2558 | continue; |
97dc35c8 L |
2559 | abort (); |
2560 | } | |
233cc9c1 L |
2561 | |
2562 | switch (r_type) | |
2563 | { | |
2564 | default: | |
2565 | break; | |
2566 | ||
2567 | case R_X86_64_GOTPCREL: | |
2568 | case R_X86_64_GOTPCRELX: | |
2569 | case R_X86_64_REX_GOTPCRELX: | |
2570 | case R_X86_64_GOTPCREL64: | |
2571 | base_got = htab->elf.sgot; | |
2572 | off = h->got.offset; | |
2573 | ||
2574 | if (base_got == NULL) | |
2575 | abort (); | |
2576 | ||
2577 | if (off == (bfd_vma) -1) | |
2578 | { | |
2579 | /* We can't use h->got.offset here to save state, or | |
2580 | even just remember the offset, as finish_dynamic_symbol | |
2581 | would use that as offset into .got. */ | |
2582 | ||
2583 | if (h->plt.offset == (bfd_vma) -1) | |
2584 | abort (); | |
2585 | ||
2586 | if (htab->elf.splt != NULL) | |
2587 | { | |
38b12349 | 2588 | plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2589 | - htab->plt.has_plt0); |
233cc9c1 L |
2590 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
2591 | base_got = htab->elf.sgotplt; | |
2592 | } | |
2593 | else | |
2594 | { | |
2595 | plt_index = h->plt.offset / plt_entry_size; | |
2596 | off = plt_index * GOT_ENTRY_SIZE; | |
2597 | base_got = htab->elf.igotplt; | |
2598 | } | |
2599 | ||
2600 | if (h->dynindx == -1 | |
2601 | || h->forced_local | |
2602 | || info->symbolic) | |
2603 | { | |
2604 | /* This references the local defitionion. We must | |
2605 | initialize this entry in the global offset table. | |
2606 | Since the offset must always be a multiple of 8, | |
2607 | we use the least significant bit to record | |
2608 | whether we have initialized it already. | |
2609 | ||
2610 | When doing a dynamic link, we create a .rela.got | |
2611 | relocation entry to initialize the value. This | |
2612 | is done in the finish_dynamic_symbol routine. */ | |
2613 | if ((off & 1) != 0) | |
2614 | off &= ~1; | |
2615 | else | |
2616 | { | |
2617 | bfd_put_64 (output_bfd, relocation, | |
2618 | base_got->contents + off); | |
2619 | /* Note that this is harmless for the GOTPLT64 | |
2620 | case, as -1 | 1 still is -1. */ | |
2621 | h->got.offset |= 1; | |
2622 | } | |
2623 | } | |
2624 | } | |
2625 | ||
2626 | relocation = (base_got->output_section->vma | |
2627 | + base_got->output_offset + off); | |
2628 | ||
2629 | goto do_relocation; | |
2630 | } | |
2631 | ||
2632 | if (h->plt.offset == (bfd_vma) -1) | |
2633 | { | |
2634 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
2635 | if (r_type == htab->pointer_r_type | |
2636 | && (input_section->flags & SEC_CODE) == 0) | |
2637 | goto do_ifunc_pointer; | |
2638 | goto bad_ifunc_reloc; | |
2639 | } | |
cbe950e9 L |
2640 | |
2641 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
2642 | if (htab->elf.splt != NULL) |
2643 | { | |
f2c29a16 | 2644 | if (htab->plt_second != NULL) |
0ff2b86e | 2645 | { |
f2c29a16 L |
2646 | resolved_plt = htab->plt_second; |
2647 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
2648 | } |
2649 | else | |
2650 | { | |
2651 | resolved_plt = htab->elf.splt; | |
2652 | plt_offset = h->plt.offset; | |
2653 | } | |
2654 | } | |
2655 | else | |
2656 | { | |
2657 | resolved_plt = htab->elf.iplt; | |
2658 | plt_offset = h->plt.offset; | |
2659 | } | |
2660 | ||
2661 | relocation = (resolved_plt->output_section->vma | |
2662 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
2663 | |
2664 | switch (r_type) | |
2665 | { | |
2666 | default: | |
233cc9c1 | 2667 | bad_ifunc_reloc: |
4c544807 L |
2668 | if (h->root.root.string) |
2669 | name = h->root.root.string; | |
2670 | else | |
2671 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
2672 | NULL); | |
4eca0228 | 2673 | _bfd_error_handler |
695344c0 | 2674 | /* xgettext:c-format */ |
871b3ab2 | 2675 | (_("%pB: relocation %s against STT_GNU_IFUNC " |
233cc9c1 L |
2676 | "symbol `%s' isn't supported"), input_bfd, |
2677 | howto->name, name); | |
cbe950e9 L |
2678 | bfd_set_error (bfd_error_bad_value); |
2679 | return FALSE; | |
2680 | ||
2681 | case R_X86_64_32S: | |
0e1862bb | 2682 | if (bfd_link_pic (info)) |
cbe950e9 | 2683 | abort (); |
710ab287 L |
2684 | goto do_relocation; |
2685 | ||
248775ba L |
2686 | case R_X86_64_32: |
2687 | if (ABI_64_P (output_bfd)) | |
2688 | goto do_relocation; | |
17672001 | 2689 | /* FALLTHROUGH */ |
eed180f8 | 2690 | case R_X86_64_64: |
233cc9c1 | 2691 | do_ifunc_pointer: |
710ab287 L |
2692 | if (rel->r_addend != 0) |
2693 | { | |
4c544807 L |
2694 | if (h->root.root.string) |
2695 | name = h->root.root.string; | |
2696 | else | |
2697 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
2698 | sym, NULL); | |
4eca0228 | 2699 | _bfd_error_handler |
695344c0 | 2700 | /* xgettext:c-format */ |
871b3ab2 | 2701 | (_("%pB: relocation %s against STT_GNU_IFUNC " |
2dcf00ce AM |
2702 | "symbol `%s' has non-zero addend: %" PRId64), |
2703 | input_bfd, howto->name, name, (int64_t) rel->r_addend); | |
710ab287 L |
2704 | bfd_set_error (bfd_error_bad_value); |
2705 | return FALSE; | |
2706 | } | |
2707 | ||
2708 | /* Generate dynamic relcoation only when there is a | |
233cc9c1 L |
2709 | non-GOT reference in a shared object or there is no |
2710 | PLT. */ | |
2711 | if ((bfd_link_pic (info) && h->non_got_ref) | |
2712 | || h->plt.offset == (bfd_vma) -1) | |
710ab287 L |
2713 | { |
2714 | Elf_Internal_Rela outrel; | |
710ab287 L |
2715 | asection *sreloc; |
2716 | ||
c25bc9fc L |
2717 | /* Need a dynamic relocation to get the real function |
2718 | address. */ | |
710ab287 L |
2719 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
2720 | info, | |
2721 | input_section, | |
2722 | rel->r_offset); | |
2723 | if (outrel.r_offset == (bfd_vma) -1 | |
2724 | || outrel.r_offset == (bfd_vma) -2) | |
2725 | abort (); | |
2726 | ||
2727 | outrel.r_offset += (input_section->output_section->vma | |
2728 | + input_section->output_offset); | |
2729 | ||
cf1070f1 | 2730 | if (POINTER_LOCAL_IFUNC_P (info, h)) |
710ab287 | 2731 | { |
871b3ab2 | 2732 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
2733 | h->root.root.string, |
2734 | h->root.u.def.section->owner); | |
2735 | ||
710ab287 | 2736 | /* This symbol is resolved locally. */ |
56b8aada L |
2737 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
2738 | outrel.r_addend = (h->root.u.def.value | |
2739 | + h->root.u.def.section->output_section->vma | |
2740 | + h->root.u.def.section->output_offset); | |
710ab287 L |
2741 | } |
2742 | else | |
2743 | { | |
351f65ca | 2744 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
2745 | outrel.r_addend = 0; |
2746 | } | |
2747 | ||
233cc9c1 L |
2748 | /* Dynamic relocations are stored in |
2749 | 1. .rela.ifunc section in PIC object. | |
2750 | 2. .rela.got section in dynamic executable. | |
2751 | 3. .rela.iplt section in static executable. */ | |
2752 | if (bfd_link_pic (info)) | |
2753 | sreloc = htab->elf.irelifunc; | |
2754 | else if (htab->elf.splt != NULL) | |
2755 | sreloc = htab->elf.srelgot; | |
2756 | else | |
2757 | sreloc = htab->elf.irelplt; | |
351f65ca | 2758 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
2759 | |
2760 | /* If this reloc is against an external symbol, we | |
2761 | do not want to fiddle with the addend. Otherwise, | |
2762 | we need to include the symbol value so that it | |
2763 | becomes an addend for the dynamic reloc. For an | |
2764 | internal symbol, we have updated addend. */ | |
56b8aada | 2765 | continue; |
710ab287 | 2766 | } |
17672001 | 2767 | /* FALLTHROUGH */ |
cbe950e9 | 2768 | case R_X86_64_PC32: |
c3320543 | 2769 | case R_X86_64_PC32_BND: |
cbe950e9 L |
2770 | case R_X86_64_PC64: |
2771 | case R_X86_64_PLT32: | |
c3320543 | 2772 | case R_X86_64_PLT32_BND: |
cbe950e9 | 2773 | goto do_relocation; |
cbe950e9 L |
2774 | } |
2775 | } | |
2776 | ||
347a8774 | 2777 | skip_ifunc: |
aec6b87e | 2778 | resolved_to_zero = (eh != NULL |
c5bce5c6 | 2779 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh)); |
aec6b87e | 2780 | |
70256ad8 AJ |
2781 | /* When generating a shared object, the relocations handled here are |
2782 | copied into the output file to be resolved at run time. */ | |
2783 | switch (r_type) | |
2784 | { | |
2785 | case R_X86_64_GOT32: | |
7b81dfbb | 2786 | case R_X86_64_GOT64: |
70256ad8 AJ |
2787 | /* Relocation is to the entry for this symbol in the global |
2788 | offset table. */ | |
70256ad8 | 2789 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
2790 | case R_X86_64_GOTPCRELX: |
2791 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
2792 | case R_X86_64_GOTPCREL64: |
2793 | /* Use global offset table entry as symbol value. */ | |
2794 | case R_X86_64_GOTPLT64: | |
de194d85 | 2795 | /* This is obsolete and treated the same as GOT64. */ |
6de2ae4a | 2796 | base_got = htab->elf.sgot; |
7b81dfbb | 2797 | |
6de2ae4a | 2798 | if (htab->elf.sgot == NULL) |
c434dee6 | 2799 | abort (); |
053579d7 | 2800 | |
9e9821dd | 2801 | relative_reloc = FALSE; |
51e0a107 | 2802 | if (h != NULL) |
70256ad8 | 2803 | { |
c434dee6 | 2804 | off = h->got.offset; |
7b81dfbb | 2805 | if (h->needs_plt |
eed180f8 | 2806 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
2807 | && off == (bfd_vma)-1) |
2808 | { | |
2809 | /* We can't use h->got.offset here to save | |
2810 | state, or even just remember the offset, as | |
2811 | finish_dynamic_symbol would use that as offset into | |
2812 | .got. */ | |
38b12349 | 2813 | bfd_vma plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2814 | - htab->plt.has_plt0); |
7b81dfbb | 2815 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 2816 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
2817 | } |
2818 | ||
2eba97c2 | 2819 | if (RESOLVED_LOCALLY_P (info, h, htab)) |
51e0a107 | 2820 | { |
2eba97c2 L |
2821 | /* We must initialize this entry in the global offset |
2822 | table. Since the offset must always be a multiple | |
2823 | of 8, we use the least significant bit to record | |
2824 | whether we have initialized it already. | |
51e0a107 JH |
2825 | |
2826 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
2827 | relocation entry to initialize the value. This is |
2828 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
2829 | if ((off & 1) != 0) |
2830 | off &= ~1; | |
2831 | else | |
2832 | { | |
2833 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
2834 | base_got->contents + off); |
2835 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 2836 | as -1 | 1 still is -1. */ |
51e0a107 | 2837 | h->got.offset |= 1; |
9e9821dd | 2838 | |
f70656b2 | 2839 | if (GENERATE_RELATIVE_RELOC_P (info, h)) |
9e9821dd L |
2840 | { |
2841 | /* If this symbol isn't dynamic in PIC, | |
2842 | generate R_X86_64_RELATIVE here. */ | |
2843 | eh->no_finish_dynamic_symbol = 1; | |
2844 | relative_reloc = TRUE; | |
2845 | } | |
51e0a107 JH |
2846 | } |
2847 | } | |
053579d7 | 2848 | else |
b34976b6 | 2849 | unresolved_reloc = FALSE; |
70256ad8 | 2850 | } |
51e0a107 JH |
2851 | else |
2852 | { | |
c434dee6 AJ |
2853 | if (local_got_offsets == NULL) |
2854 | abort (); | |
51e0a107 JH |
2855 | |
2856 | off = local_got_offsets[r_symndx]; | |
2857 | ||
2858 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
2859 | the least significant bit to record whether we have |
2860 | already generated the necessary reloc. */ | |
51e0a107 JH |
2861 | if ((off & 1) != 0) |
2862 | off &= ~1; | |
2863 | else | |
2864 | { | |
c434dee6 | 2865 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 2866 | base_got->contents + off); |
9e9821dd | 2867 | local_got_offsets[r_symndx] |= 1; |
51e0a107 | 2868 | |
0e1862bb | 2869 | if (bfd_link_pic (info)) |
9e9821dd | 2870 | relative_reloc = TRUE; |
51e0a107 | 2871 | } |
51e0a107 | 2872 | } |
6a2bda3f | 2873 | |
9e9821dd L |
2874 | if (relative_reloc) |
2875 | { | |
2876 | asection *s; | |
2877 | Elf_Internal_Rela outrel; | |
2878 | ||
2879 | /* We need to generate a R_X86_64_RELATIVE reloc | |
2880 | for the dynamic linker. */ | |
2881 | s = htab->elf.srelgot; | |
2882 | if (s == NULL) | |
2883 | abort (); | |
2884 | ||
2885 | outrel.r_offset = (base_got->output_section->vma | |
2886 | + base_got->output_offset | |
2887 | + off); | |
2888 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); | |
2889 | outrel.r_addend = relocation; | |
2890 | elf_append_rela (output_bfd, s, &outrel); | |
2891 | } | |
2892 | ||
c434dee6 AJ |
2893 | if (off >= (bfd_vma) -2) |
2894 | abort (); | |
2895 | ||
7b81dfbb AJ |
2896 | relocation = base_got->output_section->vma |
2897 | + base_got->output_offset + off; | |
56ceb5b5 L |
2898 | if (r_type != R_X86_64_GOTPCREL |
2899 | && r_type != R_X86_64_GOTPCRELX | |
2900 | && r_type != R_X86_64_REX_GOTPCRELX | |
2901 | && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
2902 | relocation -= htab->elf.sgotplt->output_section->vma |
2903 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 2904 | |
70256ad8 AJ |
2905 | break; |
2906 | ||
d6ab8113 JB |
2907 | case R_X86_64_GOTOFF64: |
2908 | /* Relocation is relative to the start of the global offset | |
2909 | table. */ | |
2910 | ||
3d949995 L |
2911 | /* Check to make sure it isn't a protected function or data |
2912 | symbol for shared library since it may not be local when | |
e3c0e327 L |
2913 | used as function address or with copy relocation. We also |
2914 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 2915 | if (bfd_link_pic (info) && h) |
d6ab8113 | 2916 | { |
e3c0e327 L |
2917 | if (!h->def_regular) |
2918 | { | |
2919 | const char *v; | |
2920 | ||
2921 | switch (ELF_ST_VISIBILITY (h->other)) | |
2922 | { | |
2923 | case STV_HIDDEN: | |
2924 | v = _("hidden symbol"); | |
2925 | break; | |
2926 | case STV_INTERNAL: | |
2927 | v = _("internal symbol"); | |
2928 | break; | |
2929 | case STV_PROTECTED: | |
2930 | v = _("protected symbol"); | |
2931 | break; | |
2932 | default: | |
2933 | v = _("symbol"); | |
2934 | break; | |
2935 | } | |
2936 | ||
4eca0228 | 2937 | _bfd_error_handler |
695344c0 | 2938 | /* xgettext:c-format */ |
871b3ab2 | 2939 | (_("%pB: relocation R_X86_64_GOTOFF64 against undefined %s" |
63a5468a | 2940 | " `%s' can not be used when making a shared object"), |
e3c0e327 L |
2941 | input_bfd, v, h->root.root.string); |
2942 | bfd_set_error (bfd_error_bad_value); | |
2943 | return FALSE; | |
2944 | } | |
0e1862bb | 2945 | else if (!bfd_link_executable (info) |
6999821f | 2946 | && !SYMBOL_REFERENCES_LOCAL_P (info, h) |
e3c0e327 L |
2947 | && (h->type == STT_FUNC |
2948 | || h->type == STT_OBJECT) | |
2949 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
2950 | { | |
4eca0228 | 2951 | _bfd_error_handler |
695344c0 | 2952 | /* xgettext:c-format */ |
871b3ab2 | 2953 | (_("%pB: relocation R_X86_64_GOTOFF64 against protected %s" |
63a5468a | 2954 | " `%s' can not be used when making a shared object"), |
e3c0e327 L |
2955 | input_bfd, |
2956 | h->type == STT_FUNC ? "function" : "data", | |
2957 | h->root.root.string); | |
2958 | bfd_set_error (bfd_error_bad_value); | |
d6ab8113 | 2959 | return FALSE; |
e3c0e327 | 2960 | } |
d6ab8113 JB |
2961 | } |
2962 | ||
2963 | /* Note that sgot is not involved in this | |
2964 | calculation. We always want the start of .got.plt. If we | |
2965 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
2966 | permitted by the ABI, we might have to change this | |
2967 | calculation. */ | |
6de2ae4a L |
2968 | relocation -= htab->elf.sgotplt->output_section->vma |
2969 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
2970 | break; |
2971 | ||
2972 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2973 | case R_X86_64_GOTPC64: |
d6ab8113 | 2974 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
2975 | relocation = htab->elf.sgotplt->output_section->vma |
2976 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
2977 | unresolved_reloc = FALSE; |
2978 | break; | |
7b81dfbb AJ |
2979 | |
2980 | case R_X86_64_PLTOFF64: | |
2981 | /* Relocation is PLT entry relative to GOT. For local | |
2982 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 2983 | if (h != NULL |
7b81dfbb | 2984 | /* See PLT32 handling. */ |
9d734efa L |
2985 | && (h->plt.offset != (bfd_vma) -1 |
2986 | || eh->plt_got.offset != (bfd_vma) -1) | |
6de2ae4a | 2987 | && htab->elf.splt != NULL) |
7b81dfbb | 2988 | { |
9d734efa L |
2989 | if (eh->plt_got.offset != (bfd_vma) -1) |
2990 | { | |
2991 | /* Use the GOT PLT. */ | |
2992 | resolved_plt = htab->plt_got; | |
2993 | plt_offset = eh->plt_got.offset; | |
2994 | } | |
f2c29a16 | 2995 | else if (htab->plt_second != NULL) |
0ff2b86e | 2996 | { |
f2c29a16 L |
2997 | resolved_plt = htab->plt_second; |
2998 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
2999 | } |
3000 | else | |
3001 | { | |
3002 | resolved_plt = htab->elf.splt; | |
3003 | plt_offset = h->plt.offset; | |
3004 | } | |
3005 | ||
3006 | relocation = (resolved_plt->output_section->vma | |
3007 | + resolved_plt->output_offset | |
3008 | + plt_offset); | |
7b81dfbb AJ |
3009 | unresolved_reloc = FALSE; |
3010 | } | |
3011 | ||
6de2ae4a L |
3012 | relocation -= htab->elf.sgotplt->output_section->vma |
3013 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 3014 | break; |
d6ab8113 | 3015 | |
70256ad8 | 3016 | case R_X86_64_PLT32: |
c3320543 | 3017 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
3018 | /* Relocation is to the entry for this symbol in the |
3019 | procedure linkage table. */ | |
3020 | ||
3021 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 3022 | without using the procedure linkage table. */ |
70256ad8 AJ |
3023 | if (h == NULL) |
3024 | break; | |
3025 | ||
dd7e64d4 L |
3026 | if ((h->plt.offset == (bfd_vma) -1 |
3027 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 3028 | || htab->elf.splt == NULL) |
70256ad8 AJ |
3029 | { |
3030 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
3031 | happens when statically linking PIC code, or when |
3032 | using -Bsymbolic. */ | |
70256ad8 AJ |
3033 | break; |
3034 | } | |
3035 | ||
451875b4 | 3036 | use_plt: |
dd7e64d4 | 3037 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 3038 | { |
f2c29a16 | 3039 | if (htab->plt_second != NULL) |
dd7e64d4 | 3040 | { |
f2c29a16 L |
3041 | resolved_plt = htab->plt_second; |
3042 | plt_offset = eh->plt_second.offset; | |
dd7e64d4 L |
3043 | } |
3044 | else | |
3045 | { | |
3046 | resolved_plt = htab->elf.splt; | |
3047 | plt_offset = h->plt.offset; | |
3048 | } | |
0ff2b86e L |
3049 | } |
3050 | else | |
3051 | { | |
dd7e64d4 L |
3052 | /* Use the GOT PLT. */ |
3053 | resolved_plt = htab->plt_got; | |
3054 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
3055 | } |
3056 | ||
3057 | relocation = (resolved_plt->output_section->vma | |
3058 | + resolved_plt->output_offset | |
3059 | + plt_offset); | |
b34976b6 | 3060 | unresolved_reloc = FALSE; |
70256ad8 AJ |
3061 | break; |
3062 | ||
1788fc08 L |
3063 | case R_X86_64_SIZE32: |
3064 | case R_X86_64_SIZE64: | |
1788fc08 L |
3065 | /* Set to symbol size. */ |
3066 | relocation = st_size; | |
3067 | goto direct; | |
3068 | ||
fd8ab9e5 AJ |
3069 | case R_X86_64_PC8: |
3070 | case R_X86_64_PC16: | |
3071 | case R_X86_64_PC32: | |
c3320543 | 3072 | case R_X86_64_PC32_BND: |
6333bc0d | 3073 | /* Don't complain about -fPIC if the symbol is undefined when |
bd7ab16b L |
3074 | building executable unless it is unresolved weak symbol, |
3075 | references a dynamic definition in PIE or -z nocopyreloc | |
3076 | is used. */ | |
07d6d2b8 | 3077 | if ((input_section->flags & SEC_ALLOC) != 0 |
90f487df | 3078 | && (input_section->flags & SEC_READONLY) != 0 |
6333bc0d | 3079 | && h != NULL |
aec6b87e | 3080 | && ((bfd_link_executable (info) |
7073b5b9 L |
3081 | && ((h->root.type == bfd_link_hash_undefweak |
3082 | && !resolved_to_zero) | |
bd7ab16b L |
3083 | || (bfd_link_pie (info) |
3084 | && !h->def_regular | |
3085 | && h->def_dynamic) | |
a5b4ee94 L |
3086 | || ((info->nocopyreloc |
3087 | || (eh->def_protected | |
3088 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
3089 | && h->def_dynamic |
3090 | && !(h->root.u.def.section->flags & SEC_CODE)))) | |
c5bb8910 | 3091 | || bfd_link_dll (info))) |
6610a52d | 3092 | { |
41bed6dd | 3093 | bfd_boolean fail = FALSE; |
6999821f | 3094 | if (SYMBOL_REFERENCES_LOCAL_P (info, h)) |
41bed6dd L |
3095 | { |
3096 | /* Symbol is referenced locally. Make sure it is | |
bd7ab16b L |
3097 | defined locally. */ |
3098 | fail = !(h->def_regular || ELF_COMMON_DEF_P (h)); | |
41bed6dd | 3099 | } |
aec6b87e | 3100 | else if (!(bfd_link_pie (info) |
bc696fd5 | 3101 | && (h->needs_copy || eh->needs_copy))) |
41bed6dd | 3102 | { |
9a926d55 | 3103 | /* Symbol doesn't need copy reloc and isn't referenced |
bd7ab16b L |
3104 | locally. Address of protected function may not be |
3105 | reachable at run-time. */ | |
3106 | fail = (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3107 | || (ELF_ST_VISIBILITY (h->other) == STV_PROTECTED | |
3108 | && h->type == STT_FUNC)); | |
41bed6dd L |
3109 | } |
3110 | ||
3111 | if (fail) | |
aab921ad | 3112 | return elf_x86_64_need_pic (info, input_bfd, input_section, |
338c190a | 3113 | h, NULL, NULL, howto); |
6610a52d | 3114 | } |
451875b4 L |
3115 | /* Since x86-64 has PC-relative PLT, we can use PLT in PIE |
3116 | as function address. */ | |
3117 | else if (h != NULL | |
3118 | && (input_section->flags & SEC_CODE) == 0 | |
3119 | && bfd_link_pie (info) | |
3120 | && h->type == STT_FUNC | |
3121 | && !h->def_regular | |
3122 | && h->def_dynamic) | |
3123 | goto use_plt; | |
6610a52d L |
3124 | /* Fall through. */ |
3125 | ||
70256ad8 AJ |
3126 | case R_X86_64_8: |
3127 | case R_X86_64_16: | |
3128 | case R_X86_64_32: | |
d6ab8113 | 3129 | case R_X86_64_PC64: |
6b3db546 | 3130 | case R_X86_64_64: |
80643fbc | 3131 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 3132 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 3133 | |
1788fc08 | 3134 | direct: |
b1e24c02 | 3135 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
3136 | break; |
3137 | ||
aebcc8ff L |
3138 | need_copy_reloc_in_pie = (bfd_link_pie (info) |
3139 | && h != NULL | |
3140 | && (h->needs_copy | |
3141 | || eh->needs_copy | |
3142 | || (h->root.type | |
3143 | == bfd_link_hash_undefined)) | |
3144 | && (X86_PCREL_TYPE_P (r_type) | |
3145 | || X86_SIZE_TYPE_P (r_type))); | |
3146 | ||
3147 | if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type, | |
3148 | need_copy_reloc_in_pie, | |
3149 | resolved_to_zero, FALSE)) | |
70256ad8 AJ |
3150 | { |
3151 | Elf_Internal_Rela outrel; | |
b34976b6 | 3152 | bfd_boolean skip, relocate; |
c434dee6 | 3153 | asection *sreloc; |
70256ad8 AJ |
3154 | |
3155 | /* When generating a shared object, these relocations | |
3156 | are copied into the output file to be resolved at run | |
407443a3 | 3157 | time. */ |
b34976b6 AM |
3158 | skip = FALSE; |
3159 | relocate = FALSE; | |
70256ad8 | 3160 | |
c629eae0 JJ |
3161 | outrel.r_offset = |
3162 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 3163 | rel->r_offset); |
c629eae0 | 3164 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 3165 | skip = TRUE; |
0fb19cbc | 3166 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 3167 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
3168 | |
3169 | outrel.r_offset += (input_section->output_section->vma | |
3170 | + input_section->output_offset); | |
3171 | ||
3172 | if (skip) | |
0bb2d96a | 3173 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 3174 | |
e74399c4 | 3175 | else if (COPY_INPUT_RELOC_P (info, h, r_type)) |
70256ad8 | 3176 | { |
351f65ca | 3177 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 3178 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
3179 | } |
3180 | else | |
3181 | { | |
4c10bbaa L |
3182 | /* This symbol is local, or marked to become local. |
3183 | When relocation overflow check is disabled, we | |
3184 | convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
3185 | if (r_type == htab->pointer_r_type | |
3186 | || (r_type == R_X86_64_32 | |
3187 | && info->no_reloc_overflow_check)) | |
607c0e09 | 3188 | { |
b34976b6 | 3189 | relocate = TRUE; |
351f65ca | 3190 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
3191 | outrel.r_addend = relocation + rel->r_addend; |
3192 | } | |
64d25c44 L |
3193 | else if (r_type == R_X86_64_64 |
3194 | && !ABI_64_P (output_bfd)) | |
3195 | { | |
3196 | relocate = TRUE; | |
3197 | outrel.r_info = htab->r_info (0, | |
3198 | R_X86_64_RELATIVE64); | |
3199 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
3200 | /* Check addend overflow. */ |
3201 | if ((outrel.r_addend & 0x80000000) | |
3202 | != (rel->r_addend & 0x80000000)) | |
3203 | { | |
3204 | const char *name; | |
268a8d3a | 3205 | int addend = rel->r_addend; |
8cf0d2dd L |
3206 | if (h && h->root.root.string) |
3207 | name = h->root.root.string; | |
3208 | else | |
3209 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3210 | sym, NULL); | |
d42c267e AM |
3211 | _bfd_error_handler |
3212 | /* xgettext:c-format */ | |
871b3ab2 | 3213 | (_("%pB: addend %s%#x in relocation %s against " |
2dcf00ce AM |
3214 | "symbol `%s' at %#" PRIx64 |
3215 | " in section `%pA' is out of range"), | |
d42c267e | 3216 | input_bfd, addend < 0 ? "-" : "", addend, |
2dcf00ce AM |
3217 | howto->name, name, (uint64_t) rel->r_offset, |
3218 | input_section); | |
8cf0d2dd L |
3219 | bfd_set_error (bfd_error_bad_value); |
3220 | return FALSE; | |
3221 | } | |
64d25c44 | 3222 | } |
607c0e09 AS |
3223 | else |
3224 | { | |
3225 | long sindx; | |
3226 | ||
8517fae7 | 3227 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
3228 | sindx = 0; |
3229 | else if (sec == NULL || sec->owner == NULL) | |
3230 | { | |
3231 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3232 | return FALSE; |
607c0e09 AS |
3233 | } |
3234 | else | |
3235 | { | |
3236 | asection *osec; | |
3237 | ||
74541ad4 AM |
3238 | /* We are turning this relocation into one |
3239 | against a section symbol. It would be | |
3240 | proper to subtract the symbol's value, | |
3241 | osec->vma, from the emitted reloc addend, | |
3242 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
3243 | osec = sec->output_section; |
3244 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
3245 | if (sindx == 0) |
3246 | { | |
3247 | asection *oi = htab->elf.text_index_section; | |
3248 | sindx = elf_section_data (oi)->dynindx; | |
3249 | } | |
3250 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
3251 | } |
3252 | ||
351f65ca | 3253 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
3254 | outrel.r_addend = relocation + rel->r_addend; |
3255 | } | |
70256ad8 AJ |
3256 | } |
3257 | ||
cbe950e9 | 3258 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 3259 | |
62d78908 L |
3260 | if (sreloc == NULL || sreloc->contents == NULL) |
3261 | { | |
3262 | r = bfd_reloc_notsupported; | |
3263 | goto check_relocation_error; | |
3264 | } | |
c434dee6 | 3265 | |
351f65ca | 3266 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
3267 | |
3268 | /* If this reloc is against an external symbol, we do | |
3269 | not want to fiddle with the addend. Otherwise, we | |
3270 | need to include the symbol value so that it becomes | |
3271 | an addend for the dynamic reloc. */ | |
0f88be7a | 3272 | if (! relocate) |
70256ad8 AJ |
3273 | continue; |
3274 | } | |
3275 | ||
3276 | break; | |
3277 | ||
bffbf940 | 3278 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
3279 | case R_X86_64_GOTPC32_TLSDESC: |
3280 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 3281 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
3282 | tls_type = GOT_UNKNOWN; |
3283 | if (h == NULL && local_got_offsets) | |
0afcef53 | 3284 | tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 3285 | else if (h != NULL) |
0afcef53 | 3286 | tls_type = elf_x86_hash_entry (h)->tls_type; |
142411ca | 3287 | |
419414ea | 3288 | r_type_tls = r_type; |
351f65ca L |
3289 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3290 | input_section, contents, | |
3291 | symtab_hdr, sym_hashes, | |
419414ea | 3292 | &r_type_tls, tls_type, rel, |
bedfd056 | 3293 | relend, h, r_symndx, TRUE)) |
534a31f6 | 3294 | return FALSE; |
bffbf940 | 3295 | |
419414ea | 3296 | if (r_type_tls == R_X86_64_TPOFF32) |
bffbf940 | 3297 | { |
142411ca L |
3298 | bfd_vma roff = rel->r_offset; |
3299 | ||
bffbf940 | 3300 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 3301 | |
419414ea | 3302 | if (r_type == R_X86_64_TLSGD) |
bffbf940 | 3303 | { |
52bc799a | 3304 | /* GD->LE transition. For 64bit, change |
e2cbcd91 L |
3305 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3306 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3307 | or | |
3308 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3309 | .byte 0x66; rex64 | |
3310 | call *__tls_get_addr@GOTPCREL(%rip) | |
3311 | which may be converted to | |
3312 | addr32 call __tls_get_addr | |
52bc799a | 3313 | into: |
e2cbcd91 L |
3314 | movq %fs:0, %rax |
3315 | leaq foo@tpoff(%rax), %rax | |
52bc799a | 3316 | For 32bit, change |
e2cbcd91 L |
3317 | leaq foo@tlsgd(%rip), %rdi |
3318 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3319 | or | |
3320 | leaq foo@tlsgd(%rip), %rdi | |
3321 | .byte 0x66; rex64 | |
3322 | call *__tls_get_addr@GOTPCREL(%rip) | |
3323 | which may be converted to | |
3324 | addr32 call __tls_get_addr | |
52bc799a | 3325 | into: |
e2cbcd91 L |
3326 | movl %fs:0, %eax |
3327 | leaq foo@tpoff(%rax), %rax | |
5c98a14e | 3328 | For largepic, change: |
e2cbcd91 L |
3329 | leaq foo@tlsgd(%rip), %rdi |
3330 | movabsq $__tls_get_addr@pltoff, %rax | |
3331 | addq %r15, %rax | |
3332 | call *%rax | |
5c98a14e | 3333 | into: |
e2cbcd91 L |
3334 | movq %fs:0, %rax |
3335 | leaq foo@tpoff(%rax), %rax | |
3336 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 3337 | int largepic = 0; |
e2cbcd91 | 3338 | if (ABI_64_P (output_bfd)) |
5c98a14e | 3339 | { |
e2cbcd91 L |
3340 | if (contents[roff + 5] == 0xb8) |
3341 | { | |
3342 | memcpy (contents + roff - 3, | |
3343 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
3344 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
3345 | largepic = 1; | |
3346 | } | |
3347 | else | |
3348 | memcpy (contents + roff - 4, | |
3349 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3350 | 16); | |
5c98a14e | 3351 | } |
52bc799a L |
3352 | else |
3353 | memcpy (contents + roff - 3, | |
3354 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3355 | 15); | |
eb4ff4d6 | 3356 | bfd_put_32 (output_bfd, |
351f65ca | 3357 | elf_x86_64_tpoff (info, relocation), |
5c98a14e | 3358 | contents + roff + 8 + largepic); |
e2cbcd91 L |
3359 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, |
3360 | R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */ | |
bffbf940 | 3361 | rel++; |
60f2e42e | 3362 | wrel++; |
bffbf940 JJ |
3363 | continue; |
3364 | } | |
419414ea | 3365 | else if (r_type == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
3366 | { |
3367 | /* GDesc -> LE transition. | |
3368 | It's originally something like: | |
3369 | leaq x@tlsdesc(%rip), %rax | |
3370 | ||
3371 | Change it to: | |
c9736ba0 | 3372 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 3373 | |
c9736ba0 | 3374 | unsigned int val, type; |
67a4f2b7 | 3375 | |
67a4f2b7 | 3376 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 3377 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
3378 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
3379 | contents + roff - 3); | |
3380 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
3381 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3382 | contents + roff - 1); | |
eb4ff4d6 | 3383 | bfd_put_32 (output_bfd, |
351f65ca | 3384 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
3385 | contents + roff); |
3386 | continue; | |
3387 | } | |
419414ea | 3388 | else if (r_type == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
3389 | { |
3390 | /* GDesc -> LE transition. | |
3391 | It's originally: | |
3392 | call *(%rax) | |
3393 | Turn it into: | |
142411ca | 3394 | xchg %ax,%ax. */ |
10efb593 | 3395 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
3396 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3397 | continue; | |
3398 | } | |
419414ea | 3399 | else if (r_type == R_X86_64_GOTTPOFF) |
bffbf940 | 3400 | { |
bffbf940 | 3401 | /* IE->LE transition: |
cf61b747 | 3402 | For 64bit, originally it can be one of: |
bffbf940 JJ |
3403 | movq foo@gottpoff(%rip), %reg |
3404 | addq foo@gottpoff(%rip), %reg | |
3405 | We change it into: | |
3406 | movq $foo, %reg | |
3407 | leaq foo(%reg), %reg | |
cf61b747 L |
3408 | addq $foo, %reg. |
3409 | For 32bit, originally it can be one of: | |
3410 | movq foo@gottpoff(%rip), %reg | |
3411 | addl foo@gottpoff(%rip), %reg | |
3412 | We change it into: | |
3413 | movq $foo, %reg | |
3414 | leal foo(%reg), %reg | |
3415 | addl $foo, %reg. */ | |
142411ca L |
3416 | |
3417 | unsigned int val, type, reg; | |
3418 | ||
cf61b747 L |
3419 | if (roff >= 3) |
3420 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
3421 | else | |
3422 | val = 0; | |
142411ca L |
3423 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
3424 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 3425 | reg >>= 3; |
bffbf940 JJ |
3426 | if (type == 0x8b) |
3427 | { | |
3428 | /* movq */ | |
3429 | if (val == 0x4c) | |
3430 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3431 | contents + roff - 3); |
4a4c5f25 L |
3432 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3433 | bfd_put_8 (output_bfd, 0x41, | |
3434 | contents + roff - 3); | |
bffbf940 | 3435 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 3436 | contents + roff - 2); |
bffbf940 | 3437 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3438 | contents + roff - 1); |
bffbf940 JJ |
3439 | } |
3440 | else if (reg == 4) | |
3441 | { | |
cf61b747 L |
3442 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
3443 | is special */ | |
bffbf940 JJ |
3444 | if (val == 0x4c) |
3445 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3446 | contents + roff - 3); |
4a4c5f25 L |
3447 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3448 | bfd_put_8 (output_bfd, 0x41, | |
3449 | contents + roff - 3); | |
bffbf940 | 3450 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 3451 | contents + roff - 2); |
bffbf940 | 3452 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3453 | contents + roff - 1); |
bffbf940 JJ |
3454 | } |
3455 | else | |
3456 | { | |
cf61b747 | 3457 | /* addq/addl -> leaq/leal */ |
bffbf940 JJ |
3458 | if (val == 0x4c) |
3459 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 3460 | contents + roff - 3); |
4a4c5f25 L |
3461 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3462 | bfd_put_8 (output_bfd, 0x45, | |
3463 | contents + roff - 3); | |
bffbf940 | 3464 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 3465 | contents + roff - 2); |
bffbf940 | 3466 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 3467 | contents + roff - 1); |
bffbf940 | 3468 | } |
eb4ff4d6 | 3469 | bfd_put_32 (output_bfd, |
351f65ca | 3470 | elf_x86_64_tpoff (info, relocation), |
142411ca | 3471 | contents + roff); |
bffbf940 JJ |
3472 | continue; |
3473 | } | |
142411ca L |
3474 | else |
3475 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
3476 | } |
3477 | ||
6de2ae4a | 3478 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3479 | abort (); |
3480 | ||
3481 | if (h != NULL) | |
67a4f2b7 AO |
3482 | { |
3483 | off = h->got.offset; | |
0afcef53 | 3484 | offplt = elf_x86_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 3485 | } |
bffbf940 JJ |
3486 | else |
3487 | { | |
3488 | if (local_got_offsets == NULL) | |
3489 | abort (); | |
3490 | ||
3491 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 3492 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
3493 | } |
3494 | ||
3495 | if ((off & 1) != 0) | |
3496 | off &= ~1; | |
26e41594 | 3497 | else |
bffbf940 JJ |
3498 | { |
3499 | Elf_Internal_Rela outrel; | |
bffbf940 | 3500 | int dr_type, indx; |
67a4f2b7 | 3501 | asection *sreloc; |
bffbf940 | 3502 | |
6de2ae4a | 3503 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3504 | abort (); |
3505 | ||
67a4f2b7 AO |
3506 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3507 | ||
3508 | if (GOT_TLS_GDESC_P (tls_type)) | |
3509 | { | |
351f65ca | 3510 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 3511 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
3512 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
3513 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
3514 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3515 | + offplt |
3516 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 3517 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 3518 | if (indx == 0) |
0afcef53 | 3519 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
67a4f2b7 AO |
3520 | else |
3521 | outrel.r_addend = 0; | |
351f65ca | 3522 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
3523 | } |
3524 | ||
6de2ae4a | 3525 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 3526 | |
6de2ae4a L |
3527 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3528 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 3529 | |
67a4f2b7 | 3530 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 3531 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
3532 | else if (GOT_TLS_GDESC_P (tls_type)) |
3533 | goto dr_done; | |
bffbf940 JJ |
3534 | else |
3535 | dr_type = R_X86_64_TPOFF64; | |
3536 | ||
6de2ae4a | 3537 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 3538 | outrel.r_addend = 0; |
67a4f2b7 AO |
3539 | if ((dr_type == R_X86_64_TPOFF64 |
3540 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
0afcef53 | 3541 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
351f65ca | 3542 | outrel.r_info = htab->r_info (indx, dr_type); |
bffbf940 | 3543 | |
351f65ca | 3544 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 3545 | |
67a4f2b7 | 3546 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
3547 | { |
3548 | if (indx == 0) | |
3549 | { | |
d40d037c | 3550 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 3551 | bfd_put_64 (output_bfd, |
0afcef53 | 3552 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3553 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
3554 | } |
3555 | else | |
3556 | { | |
3557 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3558 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 3559 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
3560 | R_X86_64_DTPOFF64); |
3561 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 3562 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 3563 | &outrel); |
bffbf940 JJ |
3564 | } |
3565 | } | |
3566 | ||
67a4f2b7 | 3567 | dr_done: |
bffbf940 JJ |
3568 | if (h != NULL) |
3569 | h->got.offset |= 1; | |
3570 | else | |
3571 | local_got_offsets[r_symndx] |= 1; | |
3572 | } | |
3573 | ||
67a4f2b7 AO |
3574 | if (off >= (bfd_vma) -2 |
3575 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 3576 | abort (); |
419414ea | 3577 | if (r_type_tls == r_type) |
bffbf940 | 3578 | { |
67a4f2b7 AO |
3579 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
3580 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
3581 | relocation = htab->elf.sgotplt->output_section->vma |
3582 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3583 | + offplt + htab->sgotplt_jump_table_size; |
3584 | else | |
6de2ae4a L |
3585 | relocation = htab->elf.sgot->output_section->vma |
3586 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3587 | unresolved_reloc = FALSE; |
bffbf940 | 3588 | } |
142411ca | 3589 | else |
67a4f2b7 | 3590 | { |
142411ca | 3591 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 3592 | |
419414ea | 3593 | if (r_type == R_X86_64_TLSGD) |
142411ca | 3594 | { |
52bc799a | 3595 | /* GD->IE transition. For 64bit, change |
e2cbcd91 L |
3596 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3597 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3598 | or | |
3599 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3600 | .byte 0x66; rex64 | |
3601 | call *__tls_get_addr@GOTPCREL(%rip | |
3602 | which may be converted to | |
3603 | addr32 call __tls_get_addr | |
52bc799a | 3604 | into: |
e2cbcd91 L |
3605 | movq %fs:0, %rax |
3606 | addq foo@gottpoff(%rip), %rax | |
52bc799a | 3607 | For 32bit, change |
e2cbcd91 L |
3608 | leaq foo@tlsgd(%rip), %rdi |
3609 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3610 | or | |
3611 | leaq foo@tlsgd(%rip), %rdi | |
3612 | .byte 0x66; rex64; | |
3613 | call *__tls_get_addr@GOTPCREL(%rip) | |
3614 | which may be converted to | |
3615 | addr32 call __tls_get_addr | |
52bc799a | 3616 | into: |
e2cbcd91 L |
3617 | movl %fs:0, %eax |
3618 | addq foo@gottpoff(%rip), %rax | |
5c98a14e | 3619 | For largepic, change: |
e2cbcd91 L |
3620 | leaq foo@tlsgd(%rip), %rdi |
3621 | movabsq $__tls_get_addr@pltoff, %rax | |
3622 | addq %r15, %rax | |
3623 | call *%rax | |
5c98a14e | 3624 | into: |
e2cbcd91 L |
3625 | movq %fs:0, %rax |
3626 | addq foo@gottpoff(%rax), %rax | |
3627 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 3628 | int largepic = 0; |
e2cbcd91 | 3629 | if (ABI_64_P (output_bfd)) |
5c98a14e | 3630 | { |
e2cbcd91 L |
3631 | if (contents[roff + 5] == 0xb8) |
3632 | { | |
3633 | memcpy (contents + roff - 3, | |
3634 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
3635 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
3636 | largepic = 1; | |
3637 | } | |
3638 | else | |
3639 | memcpy (contents + roff - 4, | |
3640 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3641 | 16); | |
5c98a14e | 3642 | } |
52bc799a L |
3643 | else |
3644 | memcpy (contents + roff - 3, | |
3645 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3646 | 15); | |
142411ca | 3647 | |
6de2ae4a L |
3648 | relocation = (htab->elf.sgot->output_section->vma |
3649 | + htab->elf.sgot->output_offset + off | |
142411ca | 3650 | - roff |
5c98a14e | 3651 | - largepic |
142411ca L |
3652 | - input_section->output_section->vma |
3653 | - input_section->output_offset | |
3654 | - 12); | |
3655 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
3656 | contents + roff + 8 + largepic); |
3657 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 3658 | rel++; |
60f2e42e | 3659 | wrel++; |
142411ca L |
3660 | continue; |
3661 | } | |
419414ea | 3662 | else if (r_type == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
3663 | { |
3664 | /* GDesc -> IE transition. | |
3665 | It's originally something like: | |
3666 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 3667 | |
142411ca | 3668 | Change it to: |
c9736ba0 | 3669 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 3670 | |
142411ca L |
3671 | /* Now modify the instruction as appropriate. To |
3672 | turn a leaq into a movq in the form we use it, it | |
3673 | suffices to change the second byte from 0x8d to | |
3674 | 0x8b. */ | |
3675 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
3676 | ||
3677 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
3678 | htab->elf.sgot->output_section->vma |
3679 | + htab->elf.sgot->output_offset + off | |
142411ca L |
3680 | - rel->r_offset |
3681 | - input_section->output_section->vma | |
3682 | - input_section->output_offset | |
3683 | - 4, | |
3684 | contents + roff); | |
3685 | continue; | |
3686 | } | |
419414ea | 3687 | else if (r_type == R_X86_64_TLSDESC_CALL) |
142411ca L |
3688 | { |
3689 | /* GDesc -> IE transition. | |
3690 | It's originally: | |
3691 | call *(%rax) | |
3692 | ||
3693 | Change it to: | |
c9736ba0 | 3694 | xchg %ax, %ax. */ |
142411ca | 3695 | |
142411ca L |
3696 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
3697 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
3698 | continue; | |
3699 | } | |
3700 | else | |
3701 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 3702 | } |
bffbf940 JJ |
3703 | break; |
3704 | ||
3705 | case R_X86_64_TLSLD: | |
351f65ca L |
3706 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3707 | input_section, contents, | |
3708 | symtab_hdr, sym_hashes, | |
bedfd056 L |
3709 | &r_type, GOT_UNKNOWN, rel, |
3710 | relend, h, r_symndx, TRUE)) | |
142411ca | 3711 | return FALSE; |
a3fadc9a | 3712 | |
142411ca L |
3713 | if (r_type != R_X86_64_TLSLD) |
3714 | { | |
bffbf940 | 3715 | /* LD->LE transition: |
e2cbcd91 L |
3716 | leaq foo@tlsld(%rip), %rdi |
3717 | call __tls_get_addr@PLT | |
3718 | For 64bit, we change it into: | |
3719 | .word 0x6666; .byte 0x66; movq %fs:0, %rax | |
3720 | For 32bit, we change it into: | |
3721 | nopl 0x0(%rax); movl %fs:0, %eax | |
3722 | Or | |
3723 | leaq foo@tlsld(%rip), %rdi; | |
3724 | call *__tls_get_addr@GOTPCREL(%rip) | |
3725 | which may be converted to | |
3726 | addr32 call __tls_get_addr | |
52bc799a | 3727 | For 64bit, we change it into: |
e2cbcd91 | 3728 | .word 0x6666; .word 0x6666; movq %fs:0, %rax |
52bc799a | 3729 | For 32bit, we change it into: |
e2cbcd91 | 3730 | nopw 0x0(%rax); movl %fs:0, %eax |
5c98a14e | 3731 | For largepic, change: |
e2cbcd91 L |
3732 | leaq foo@tlsgd(%rip), %rdi |
3733 | movabsq $__tls_get_addr@pltoff, %rax | |
3734 | addq %rbx, %rax | |
3735 | call *%rax | |
3736 | into | |
3737 | data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
3738 | movq %fs:0, %eax */ | |
142411ca L |
3739 | |
3740 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
e2cbcd91 L |
3741 | if (ABI_64_P (output_bfd)) |
3742 | { | |
3743 | if (contents[rel->r_offset + 5] == 0xb8) | |
3744 | memcpy (contents + rel->r_offset - 3, | |
3745 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
3746 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
3747 | else if (contents[rel->r_offset + 4] == 0xff | |
3748 | || contents[rel->r_offset + 4] == 0x67) | |
3749 | memcpy (contents + rel->r_offset - 3, | |
3750 | "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", | |
3751 | 13); | |
3752 | else | |
3753 | memcpy (contents + rel->r_offset - 3, | |
3754 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
3755 | } | |
52bc799a | 3756 | else |
e2cbcd91 L |
3757 | { |
3758 | if (contents[rel->r_offset + 4] == 0xff) | |
3759 | memcpy (contents + rel->r_offset - 3, | |
3760 | "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", | |
3761 | 13); | |
3762 | else | |
3763 | memcpy (contents + rel->r_offset - 3, | |
3764 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
3765 | } | |
3766 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX | |
3767 | and R_X86_64_PLTOFF64. */ | |
bffbf940 | 3768 | rel++; |
60f2e42e | 3769 | wrel++; |
bffbf940 JJ |
3770 | continue; |
3771 | } | |
3772 | ||
6de2ae4a | 3773 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3774 | abort (); |
3775 | ||
0afcef53 | 3776 | off = htab->tls_ld_or_ldm_got.offset; |
bffbf940 JJ |
3777 | if (off & 1) |
3778 | off &= ~1; | |
3779 | else | |
3780 | { | |
3781 | Elf_Internal_Rela outrel; | |
bffbf940 | 3782 | |
6de2ae4a | 3783 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3784 | abort (); |
3785 | ||
6de2ae4a L |
3786 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3787 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
3788 | |
3789 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3790 | htab->elf.sgot->contents + off); |
bffbf940 | 3791 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 3792 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 3793 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 3794 | outrel.r_addend = 0; |
351f65ca | 3795 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 3796 | &outrel); |
0afcef53 | 3797 | htab->tls_ld_or_ldm_got.offset |= 1; |
bffbf940 | 3798 | } |
6de2ae4a L |
3799 | relocation = htab->elf.sgot->output_section->vma |
3800 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3801 | unresolved_reloc = FALSE; |
bffbf940 JJ |
3802 | break; |
3803 | ||
3804 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
3805 | if (!bfd_link_executable (info) |
3806 | || (input_section->flags & SEC_CODE) == 0) | |
0afcef53 | 3807 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
bffbf940 | 3808 | else |
351f65ca | 3809 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
3810 | break; |
3811 | ||
3812 | case R_X86_64_TPOFF32: | |
6769d501 | 3813 | case R_X86_64_TPOFF64: |
0e1862bb | 3814 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 3815 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
3816 | break; |
3817 | ||
a69ed7f7 L |
3818 | case R_X86_64_DTPOFF64: |
3819 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
0afcef53 | 3820 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
a69ed7f7 L |
3821 | break; |
3822 | ||
70256ad8 AJ |
3823 | default: |
3824 | break; | |
3825 | } | |
8d88c4ca | 3826 | |
239e1f3a AM |
3827 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3828 | because such sections are not SEC_ALLOC and thus ld.so will | |
3829 | not process them. */ | |
c434dee6 | 3830 | if (unresolved_reloc |
239e1f3a | 3831 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
3832 | && h->def_dynamic) |
3833 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
3834 | rel->r_offset) != (bfd_vma) -1) | |
a040981f | 3835 | { |
7073b5b9 L |
3836 | switch (r_type) |
3837 | { | |
3838 | case R_X86_64_32S: | |
a5b4ee94 L |
3839 | sec = h->root.u.def.section; |
3840 | if ((info->nocopyreloc | |
3841 | || (eh->def_protected | |
3842 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
3843 | && !(h->root.u.def.section->flags & SEC_CODE)) |
3844 | return elf_x86_64_need_pic (info, input_bfd, input_section, | |
3845 | h, NULL, NULL, howto); | |
3846 | /* Fall through. */ | |
3847 | ||
3848 | default: | |
3849 | _bfd_error_handler | |
3850 | /* xgettext:c-format */ | |
2dcf00ce AM |
3851 | (_("%pB(%pA+%#" PRIx64 "): " |
3852 | "unresolvable %s relocation against symbol `%s'"), | |
7073b5b9 L |
3853 | input_bfd, |
3854 | input_section, | |
2dcf00ce | 3855 | (uint64_t) rel->r_offset, |
7073b5b9 L |
3856 | howto->name, |
3857 | h->root.root.string); | |
3858 | return FALSE; | |
3859 | } | |
a040981f | 3860 | } |
c434dee6 | 3861 | |
cbe950e9 | 3862 | do_relocation: |
8d88c4ca | 3863 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
3864 | contents, rel->r_offset, |
3865 | relocation, rel->r_addend); | |
8d88c4ca | 3866 | |
62d78908 | 3867 | check_relocation_error: |
8d88c4ca | 3868 | if (r != bfd_reloc_ok) |
8da6118f | 3869 | { |
c434dee6 AJ |
3870 | const char *name; |
3871 | ||
3872 | if (h != NULL) | |
3873 | name = h->root.root.string; | |
3874 | else | |
8da6118f | 3875 | { |
c434dee6 AJ |
3876 | name = bfd_elf_string_from_elf_section (input_bfd, |
3877 | symtab_hdr->sh_link, | |
3878 | sym->st_name); | |
3879 | if (name == NULL) | |
b34976b6 | 3880 | return FALSE; |
c434dee6 AJ |
3881 | if (*name == '\0') |
3882 | name = bfd_section_name (input_bfd, sec); | |
3883 | } | |
3884 | ||
3885 | if (r == bfd_reloc_overflow) | |
8b43e456 | 3886 | { |
78984959 | 3887 | if (converted_reloc) |
8b43e456 L |
3888 | { |
3889 | info->callbacks->einfo | |
3890 | (_("%F%P: failed to convert GOTPCREL relocation; relink with --no-relax\n")); | |
3891 | return FALSE; | |
3892 | } | |
3893 | (*info->callbacks->reloc_overflow) | |
3894 | (info, (h ? &h->root : NULL), name, howto->name, | |
3895 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
3896 | } | |
c434dee6 AJ |
3897 | else |
3898 | { | |
4eca0228 | 3899 | _bfd_error_handler |
695344c0 | 3900 | /* xgettext:c-format */ |
2dcf00ce | 3901 | (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"), |
d003868e | 3902 | input_bfd, input_section, |
2dcf00ce | 3903 | (uint64_t) rel->r_offset, name, (int) r); |
b34976b6 | 3904 | return FALSE; |
8da6118f KH |
3905 | } |
3906 | } | |
60f2e42e L |
3907 | |
3908 | if (wrel != rel) | |
3909 | *wrel = *rel; | |
3910 | } | |
3911 | ||
3912 | if (wrel != rel) | |
3913 | { | |
3914 | Elf_Internal_Shdr *rel_hdr; | |
3915 | size_t deleted = rel - wrel; | |
3916 | ||
3917 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
3918 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
3919 | if (rel_hdr->sh_size == 0) | |
3920 | { | |
3921 | /* It is too late to remove an empty reloc section. Leave | |
3922 | one NONE reloc. | |
3923 | ??? What is wrong with an empty section??? */ | |
3924 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
3925 | deleted -= 1; | |
3926 | } | |
3927 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
3928 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
3929 | input_section->reloc_count -= deleted; | |
8d88c4ca | 3930 | } |
70256ad8 | 3931 | |
b34976b6 | 3932 | return TRUE; |
70256ad8 AJ |
3933 | } |
3934 | ||
3935 | /* Finish up dynamic symbol handling. We set the contents of various | |
3936 | dynamic sections here. */ | |
3937 | ||
b34976b6 | 3938 | static bfd_boolean |
351f65ca L |
3939 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
3940 | struct bfd_link_info *info, | |
3941 | struct elf_link_hash_entry *h, | |
aec6b87e | 3942 | Elf_Internal_Sym *sym) |
70256ad8 | 3943 | { |
0afcef53 | 3944 | struct elf_x86_link_hash_table *htab; |
f2c29a16 | 3945 | bfd_boolean use_plt_second; |
0afcef53 | 3946 | struct elf_x86_link_hash_entry *eh; |
aec6b87e | 3947 | bfd_boolean local_undefweak; |
70256ad8 | 3948 | |
0afcef53 | 3949 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
3950 | if (htab == NULL) |
3951 | return FALSE; | |
70256ad8 | 3952 | |
f2c29a16 L |
3953 | /* Use the second PLT section only if there is .plt section. */ |
3954 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
0ff2b86e | 3955 | |
0afcef53 | 3956 | eh = (struct elf_x86_link_hash_entry *) h; |
9e9821dd L |
3957 | if (eh->no_finish_dynamic_symbol) |
3958 | abort (); | |
dd7e64d4 | 3959 | |
aec6b87e L |
3960 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
3961 | resolved undefined weak symbols in executable so that their | |
3962 | references have value 0 at run-time. */ | |
c5bce5c6 | 3963 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); |
aec6b87e | 3964 | |
70256ad8 AJ |
3965 | if (h->plt.offset != (bfd_vma) -1) |
3966 | { | |
70256ad8 | 3967 | bfd_vma plt_index; |
38b12349 | 3968 | bfd_vma got_offset, plt_offset; |
70256ad8 | 3969 | Elf_Internal_Rela rela; |
947216bf | 3970 | bfd_byte *loc; |
0ff2b86e | 3971 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 3972 | const struct elf_backend_data *bed; |
5974eba6 | 3973 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
3974 | |
3975 | /* When building a static executable, use .iplt, .igot.plt and | |
3976 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 3977 | if (htab->elf.splt != NULL) |
cbe950e9 | 3978 | { |
6de2ae4a L |
3979 | plt = htab->elf.splt; |
3980 | gotplt = htab->elf.sgotplt; | |
3981 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
3982 | } |
3983 | else | |
3984 | { | |
6de2ae4a L |
3985 | plt = htab->elf.iplt; |
3986 | gotplt = htab->elf.igotplt; | |
3987 | relplt = htab->elf.irelplt; | |
cbe950e9 | 3988 | } |
70256ad8 | 3989 | |
f3180fa9 | 3990 | VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak) |
70256ad8 AJ |
3991 | |
3992 | /* Get the index in the procedure linkage table which | |
3993 | corresponds to this symbol. This is the index of this symbol | |
3994 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 3995 | first entry in the procedure linkage table is reserved. |
6bbec505 | 3996 | |
cbe950e9 | 3997 | Get the offset into the .got table of the entry that |
407443a3 | 3998 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
3999 | bytes. The first three are reserved for the dynamic linker. |
4000 | ||
4001 | For static executables, we don't reserve anything. */ | |
4002 | ||
6de2ae4a | 4003 | if (plt == htab->elf.splt) |
cbe950e9 | 4004 | { |
765e526c L |
4005 | got_offset = (h->plt.offset / htab->plt.plt_entry_size |
4006 | - htab->plt.has_plt0); | |
e1f98742 | 4007 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
4008 | } |
4009 | else | |
4010 | { | |
765e526c | 4011 | got_offset = h->plt.offset / htab->plt.plt_entry_size; |
e1f98742 | 4012 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 4013 | } |
70256ad8 | 4014 | |
38b12349 | 4015 | /* Fill in the entry in the procedure linkage table. */ |
765e526c L |
4016 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, |
4017 | htab->plt.plt_entry_size); | |
f2c29a16 | 4018 | if (use_plt_second) |
0ff2b86e | 4019 | { |
f2c29a16 | 4020 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
765e526c L |
4021 | htab->non_lazy_plt->plt_entry, |
4022 | htab->non_lazy_plt->plt_entry_size); | |
0ff2b86e | 4023 | |
f2c29a16 L |
4024 | resolved_plt = htab->plt_second; |
4025 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
4026 | } |
4027 | else | |
4028 | { | |
0ff2b86e L |
4029 | resolved_plt = plt; |
4030 | plt_offset = h->plt.offset; | |
4031 | } | |
eed180f8 RM |
4032 | |
4033 | /* Insert the relocation positions of the plt section. */ | |
4034 | ||
4035 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
4036 | subtracting the size of that instruction. */ | |
ab7fede8 L |
4037 | plt_got_pcrel_offset = (gotplt->output_section->vma |
4038 | + gotplt->output_offset | |
4039 | + got_offset | |
4040 | - resolved_plt->output_section->vma | |
4041 | - resolved_plt->output_offset | |
4042 | - plt_offset | |
765e526c | 4043 | - htab->plt.plt_got_insn_size); |
ab7fede8 L |
4044 | |
4045 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 4046 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
695344c0 | 4047 | /* xgettext:c-format */ |
871b3ab2 | 4048 | info->callbacks->einfo (_("%F%pB: PC-relative offset overflow in PLT entry for `%s'\n"), |
ab7fede8 L |
4049 | output_bfd, h->root.root.string); |
4050 | ||
4051 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
38b12349 | 4052 | (resolved_plt->contents + plt_offset |
765e526c | 4053 | + htab->plt.plt_got_offset)); |
cbe950e9 | 4054 | |
653165cc | 4055 | /* Fill in the entry in the global offset table, initially this |
aec6b87e L |
4056 | points to the second part of the PLT entry. Leave the entry |
4057 | as zero for undefined weak symbol in PIE. No PLT relocation | |
4058 | against undefined weak symbol in PIE. */ | |
4059 | if (!local_undefweak) | |
cbe950e9 | 4060 | { |
765e526c | 4061 | if (htab->plt.has_plt0) |
38b12349 L |
4062 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4063 | + plt->output_offset | |
4064 | + h->plt.offset | |
765e526c | 4065 | + htab->lazy_plt->plt_lazy_offset), |
38b12349 | 4066 | gotplt->contents + got_offset); |
aec6b87e L |
4067 | |
4068 | /* Fill in the entry in the .rela.plt section. */ | |
4069 | rela.r_offset = (gotplt->output_section->vma | |
4070 | + gotplt->output_offset | |
4071 | + got_offset); | |
cf1070f1 | 4072 | if (PLT_LOCAL_IFUNC_P (info, h)) |
aec6b87e | 4073 | { |
871b3ab2 | 4074 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
4075 | h->root.root.string, |
4076 | h->root.u.def.section->owner); | |
4077 | ||
aec6b87e L |
4078 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
4079 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
4080 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); | |
4081 | rela.r_addend = (h->root.u.def.value | |
4082 | + h->root.u.def.section->output_section->vma | |
4083 | + h->root.u.def.section->output_offset); | |
4084 | /* R_X86_64_IRELATIVE comes last. */ | |
4085 | plt_index = htab->next_irelative_index--; | |
4086 | } | |
4087 | else | |
4088 | { | |
4089 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); | |
4090 | rela.r_addend = 0; | |
4091 | plt_index = htab->next_jump_slot_index++; | |
4092 | } | |
e1f98742 | 4093 | |
38b12349 L |
4094 | /* Don't fill the second and third slots in PLT entry for |
4095 | static executables nor without PLT0. */ | |
765e526c | 4096 | if (plt == htab->elf.splt && htab->plt.has_plt0) |
aec6b87e | 4097 | { |
38b12349 | 4098 | bfd_vma plt0_offset |
765e526c | 4099 | = h->plt.offset + htab->lazy_plt->plt_plt_insn_end; |
aec6b87e L |
4100 | |
4101 | /* Put relocation index. */ | |
4102 | bfd_put_32 (output_bfd, plt_index, | |
4103 | (plt->contents + h->plt.offset | |
765e526c | 4104 | + htab->lazy_plt->plt_reloc_offset)); |
aec6b87e L |
4105 | |
4106 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
4107 | check relocation index for overflow since branch displacement | |
4108 | will overflow first. */ | |
4109 | if (plt0_offset > 0x80000000) | |
695344c0 | 4110 | /* xgettext:c-format */ |
871b3ab2 | 4111 | info->callbacks->einfo (_("%F%pB: branch displacement overflow in PLT entry for `%s'\n"), |
aec6b87e L |
4112 | output_bfd, h->root.root.string); |
4113 | bfd_put_32 (output_bfd, - plt0_offset, | |
38b12349 | 4114 | (plt->contents + h->plt.offset |
765e526c | 4115 | + htab->lazy_plt->plt_plt_offset)); |
aec6b87e | 4116 | } |
351f65ca | 4117 | |
aec6b87e L |
4118 | bed = get_elf_backend_data (output_bfd); |
4119 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
4120 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
4121 | } | |
dd7e64d4 L |
4122 | } |
4123 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
4124 | { | |
38b12349 | 4125 | bfd_vma got_offset, plt_offset; |
dd7e64d4 L |
4126 | asection *plt, *got; |
4127 | bfd_boolean got_after_plt; | |
4128 | int32_t got_pcrel_offset; | |
dd7e64d4 L |
4129 | |
4130 | /* Set the entry in the GOT procedure linkage table. */ | |
4131 | plt = htab->plt_got; | |
4132 | got = htab->elf.sgot; | |
4133 | got_offset = h->got.offset; | |
4134 | ||
4135 | if (got_offset == (bfd_vma) -1 | |
e492d2f8 | 4136 | || (h->type == STT_GNU_IFUNC && h->def_regular) |
dd7e64d4 L |
4137 | || plt == NULL |
4138 | || got == NULL) | |
4139 | abort (); | |
70256ad8 | 4140 | |
38b12349 | 4141 | /* Use the non-lazy PLT entry template for the GOT PLT since they |
dd7e64d4 | 4142 | are the identical. */ |
dd7e64d4 L |
4143 | /* Fill in the entry in the GOT procedure linkage table. */ |
4144 | plt_offset = eh->plt_got.offset; | |
4145 | memcpy (plt->contents + plt_offset, | |
765e526c L |
4146 | htab->non_lazy_plt->plt_entry, |
4147 | htab->non_lazy_plt->plt_entry_size); | |
dd7e64d4 L |
4148 | |
4149 | /* Put offset the PC-relative instruction referring to the GOT | |
4150 | entry, subtracting the size of that instruction. */ | |
4151 | got_pcrel_offset = (got->output_section->vma | |
4152 | + got->output_offset | |
4153 | + got_offset | |
4154 | - plt->output_section->vma | |
4155 | - plt->output_offset | |
4156 | - plt_offset | |
765e526c | 4157 | - htab->non_lazy_plt->plt_got_insn_size); |
dd7e64d4 L |
4158 | |
4159 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
4160 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
4161 | if ((got_after_plt && got_pcrel_offset < 0) | |
4162 | || (!got_after_plt && got_pcrel_offset > 0)) | |
695344c0 | 4163 | /* xgettext:c-format */ |
871b3ab2 | 4164 | info->callbacks->einfo (_("%F%pB: PC-relative offset overflow in GOT PLT entry for `%s'\n"), |
dd7e64d4 L |
4165 | output_bfd, h->root.root.string); |
4166 | ||
4167 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
38b12349 | 4168 | (plt->contents + plt_offset |
765e526c | 4169 | + htab->non_lazy_plt->plt_got_offset)); |
dd7e64d4 L |
4170 | } |
4171 | ||
aec6b87e L |
4172 | if (!local_undefweak |
4173 | && !h->def_regular | |
dd7e64d4 L |
4174 | && (h->plt.offset != (bfd_vma) -1 |
4175 | || eh->plt_got.offset != (bfd_vma) -1)) | |
4176 | { | |
4177 | /* Mark the symbol as undefined, rather than as defined in | |
4178 | the .plt section. Leave the value if there were any | |
4179 | relocations where pointer equality matters (this is a clue | |
4180 | for the dynamic linker, to make function pointer | |
4181 | comparisons work between an application and shared | |
4182 | library), otherwise set it to zero. If a function is only | |
4183 | called from a binary, there is no need to slow down | |
4184 | shared libraries because of that. */ | |
4185 | sym->st_shndx = SHN_UNDEF; | |
4186 | if (!h->pointer_equality_needed) | |
4187 | sym->st_value = 0; | |
70256ad8 AJ |
4188 | } |
4189 | ||
4ec09950 L |
4190 | _bfd_x86_elf_link_fixup_ifunc_symbol (info, htab, h, sym); |
4191 | ||
aec6b87e L |
4192 | /* Don't generate dynamic GOT relocation against undefined weak |
4193 | symbol in executable. */ | |
bffbf940 | 4194 | if (h->got.offset != (bfd_vma) -1 |
0afcef53 L |
4195 | && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h)->tls_type) |
4196 | && elf_x86_hash_entry (h)->tls_type != GOT_TLS_IE | |
aec6b87e | 4197 | && !local_undefweak) |
053579d7 | 4198 | { |
053579d7 | 4199 | Elf_Internal_Rela rela; |
233cc9c1 | 4200 | asection *relgot = htab->elf.srelgot; |
053579d7 AJ |
4201 | |
4202 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 4203 | up. */ |
6de2ae4a | 4204 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 4205 | abort (); |
053579d7 | 4206 | |
6de2ae4a L |
4207 | rela.r_offset = (htab->elf.sgot->output_section->vma |
4208 | + htab->elf.sgot->output_offset | |
dc810e39 | 4209 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
4210 | |
4211 | /* If this is a static link, or it is a -Bsymbolic link and the | |
4212 | symbol is defined locally or was forced to be local because | |
4213 | of a version file, we just want to emit a RELATIVE reloc. | |
4214 | The entry in the global offset table will already have been | |
4215 | initialized in the relocate_section function. */ | |
710ab287 | 4216 | if (h->def_regular |
0018b0a3 L |
4217 | && h->type == STT_GNU_IFUNC) |
4218 | { | |
233cc9c1 L |
4219 | if (h->plt.offset == (bfd_vma) -1) |
4220 | { | |
4221 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
4222 | if (htab->elf.splt == NULL) | |
4223 | { | |
4224 | /* use .rel[a].iplt section to store .got relocations | |
4225 | in static executable. */ | |
4226 | relgot = htab->elf.irelplt; | |
4227 | } | |
6999821f | 4228 | if (SYMBOL_REFERENCES_LOCAL_P (info, h)) |
233cc9c1 | 4229 | { |
871b3ab2 | 4230 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
4231 | h->root.root.string, |
4232 | h->root.u.def.section->owner); | |
4233 | ||
233cc9c1 L |
4234 | rela.r_info = htab->r_info (0, |
4235 | R_X86_64_IRELATIVE); | |
4236 | rela.r_addend = (h->root.u.def.value | |
4237 | + h->root.u.def.section->output_section->vma | |
4238 | + h->root.u.def.section->output_offset); | |
4239 | } | |
4240 | else | |
4241 | goto do_glob_dat; | |
4242 | } | |
4243 | else if (bfd_link_pic (info)) | |
710ab287 L |
4244 | { |
4245 | /* Generate R_X86_64_GLOB_DAT. */ | |
4246 | goto do_glob_dat; | |
4247 | } | |
4248 | else | |
4249 | { | |
90d60710 | 4250 | asection *plt; |
aab82f4c | 4251 | bfd_vma plt_offset; |
90d60710 | 4252 | |
710ab287 L |
4253 | if (!h->pointer_equality_needed) |
4254 | abort (); | |
4255 | ||
4256 | /* For non-shared object, we can't use .got.plt, which | |
4257 | contains the real function addres if we need pointer | |
4258 | equality. We load the GOT entry with the PLT entry. */ | |
f2c29a16 | 4259 | if (htab->plt_second != NULL) |
aab82f4c | 4260 | { |
f2c29a16 L |
4261 | plt = htab->plt_second; |
4262 | plt_offset = eh->plt_second.offset; | |
aab82f4c L |
4263 | } |
4264 | else | |
4265 | { | |
4266 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
4267 | plt_offset = h->plt.offset; | |
4268 | } | |
710ab287 L |
4269 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4270 | + plt->output_offset | |
aab82f4c | 4271 | + plt_offset), |
6de2ae4a | 4272 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
4273 | return TRUE; |
4274 | } | |
0018b0a3 | 4275 | } |
0e1862bb | 4276 | else if (bfd_link_pic (info) |
6999821f | 4277 | && SYMBOL_REFERENCES_LOCAL_P (info, h)) |
053579d7 | 4278 | { |
ad71ce8d | 4279 | if (!(h->def_regular || ELF_COMMON_DEF_P (h))) |
41bed6dd | 4280 | return FALSE; |
cc78d0af | 4281 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 4282 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
4283 | rela.r_addend = (h->root.u.def.value |
4284 | + h->root.u.def.section->output_section->vma | |
4285 | + h->root.u.def.section->output_offset); | |
4286 | } | |
4287 | else | |
4288 | { | |
4289 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 4290 | do_glob_dat: |
c434dee6 | 4291 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4292 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 4293 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
4294 | rela.r_addend = 0; |
4295 | } | |
4296 | ||
233cc9c1 | 4297 | elf_append_rela (output_bfd, relgot, &rela); |
053579d7 AJ |
4298 | } |
4299 | ||
f5385ebf | 4300 | if (h->needs_copy) |
70256ad8 | 4301 | { |
70256ad8 | 4302 | Elf_Internal_Rela rela; |
5474d94f | 4303 | asection *s; |
70256ad8 AJ |
4304 | |
4305 | /* This symbol needs a copy reloc. Set it up. */ | |
ff38b4cc | 4306 | VERIFY_COPY_RELOC (h, htab) |
70256ad8 AJ |
4307 | |
4308 | rela.r_offset = (h->root.u.def.value | |
4309 | + h->root.u.def.section->output_section->vma | |
4310 | + h->root.u.def.section->output_offset); | |
351f65ca | 4311 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 4312 | rela.r_addend = 0; |
afbf7e8e | 4313 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
4314 | s = htab->elf.sreldynrelro; |
4315 | else | |
4316 | s = htab->elf.srelbss; | |
4317 | elf_append_rela (output_bfd, s, &rela); | |
70256ad8 AJ |
4318 | } |
4319 | ||
b34976b6 | 4320 | return TRUE; |
70256ad8 AJ |
4321 | } |
4322 | ||
c25bc9fc L |
4323 | /* Finish up local dynamic symbol handling. We set the contents of |
4324 | various dynamic sections here. */ | |
4325 | ||
4326 | static bfd_boolean | |
351f65ca | 4327 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
4328 | { |
4329 | struct elf_link_hash_entry *h | |
4330 | = (struct elf_link_hash_entry *) *slot; | |
4331 | struct bfd_link_info *info | |
eed180f8 | 4332 | = (struct bfd_link_info *) inf; |
c25bc9fc | 4333 | |
351f65ca | 4334 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
5f0f0847 | 4335 | info, h, NULL); |
c25bc9fc L |
4336 | } |
4337 | ||
aec6b87e L |
4338 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
4339 | here since undefined weak symbol may not be dynamic and may not be | |
4340 | called for elf_x86_64_finish_dynamic_symbol. */ | |
4341 | ||
4342 | static bfd_boolean | |
4343 | elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
4344 | void *inf) | |
4345 | { | |
4346 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
4347 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
4348 | ||
4349 | if (h->root.type != bfd_link_hash_undefweak | |
4350 | || h->dynindx != -1) | |
4351 | return TRUE; | |
4352 | ||
4353 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, | |
5f0f0847 | 4354 | info, h, NULL); |
aec6b87e L |
4355 | } |
4356 | ||
c434dee6 AJ |
4357 | /* Used to decide how to sort relocs in an optimal manner for the |
4358 | dynamic linker, before writing them out. */ | |
4359 | ||
4360 | static enum elf_reloc_type_class | |
cae1fbbb | 4361 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
4362 | const asection *rel_sec ATTRIBUTE_UNUSED, |
4363 | const Elf_Internal_Rela *rela) | |
c434dee6 | 4364 | { |
cae1fbbb L |
4365 | bfd *abfd = info->output_bfd; |
4366 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
0afcef53 L |
4367 | struct elf_x86_link_hash_table *htab |
4368 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
cae1fbbb | 4369 | |
d9e3b590 L |
4370 | if (htab->elf.dynsym != NULL |
4371 | && htab->elf.dynsym->contents != NULL) | |
4372 | { | |
4373 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
07d6d2b8 | 4374 | dynamic symbols. */ |
d9e3b590 | 4375 | unsigned long r_symndx = htab->r_sym (rela->r_info); |
897463b1 L |
4376 | if (r_symndx != STN_UNDEF) |
4377 | { | |
4378 | Elf_Internal_Sym sym; | |
4379 | if (!bed->s->swap_symbol_in (abfd, | |
4380 | (htab->elf.dynsym->contents | |
4381 | + r_symndx * bed->s->sizeof_sym), | |
4382 | 0, &sym)) | |
4383 | abort (); | |
d9e3b590 | 4384 | |
897463b1 L |
4385 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
4386 | return reloc_class_ifunc; | |
4387 | } | |
d9e3b590 | 4388 | } |
cae1fbbb | 4389 | |
351f65ca | 4390 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 | 4391 | { |
c428ce9d L |
4392 | case R_X86_64_IRELATIVE: |
4393 | return reloc_class_ifunc; | |
c434dee6 | 4394 | case R_X86_64_RELATIVE: |
1da80baa | 4395 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
4396 | return reloc_class_relative; |
4397 | case R_X86_64_JUMP_SLOT: | |
4398 | return reloc_class_plt; | |
4399 | case R_X86_64_COPY: | |
4400 | return reloc_class_copy; | |
4401 | default: | |
4402 | return reloc_class_normal; | |
4403 | } | |
4404 | } | |
4405 | ||
70256ad8 AJ |
4406 | /* Finish up the dynamic sections. */ |
4407 | ||
b34976b6 | 4408 | static bfd_boolean |
351f65ca L |
4409 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
4410 | struct bfd_link_info *info) | |
70256ad8 | 4411 | { |
0afcef53 | 4412 | struct elf_x86_link_hash_table *htab; |
70256ad8 | 4413 | |
9577f60b | 4414 | htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info); |
4dfe6ac6 NC |
4415 | if (htab == NULL) |
4416 | return FALSE; | |
4417 | ||
9577f60b L |
4418 | if (! htab->elf.dynamic_sections_created) |
4419 | return TRUE; | |
70256ad8 | 4420 | |
9577f60b | 4421 | if (htab->elf.splt && htab->elf.splt->size > 0) |
e41b3a13 | 4422 | { |
9577f60b L |
4423 | elf_section_data (htab->elf.splt->output_section) |
4424 | ->this_hdr.sh_entsize = htab->plt.plt_entry_size; | |
e41b3a13 | 4425 | |
9577f60b | 4426 | if (htab->plt.has_plt0) |
fff53dae | 4427 | { |
9577f60b L |
4428 | /* Fill in the special first entry in the procedure linkage |
4429 | table. */ | |
4430 | memcpy (htab->elf.splt->contents, | |
4431 | htab->lazy_plt->plt0_entry, | |
4432 | htab->lazy_plt->plt0_entry_size); | |
4433 | /* Add offset for pushq GOT+8(%rip), since the instruction | |
4434 | uses 6 bytes subtract this value. */ | |
4435 | bfd_put_32 (output_bfd, | |
4436 | (htab->elf.sgotplt->output_section->vma | |
4437 | + htab->elf.sgotplt->output_offset | |
4438 | + 8 | |
4439 | - htab->elf.splt->output_section->vma | |
4440 | - htab->elf.splt->output_offset | |
4441 | - 6), | |
4442 | (htab->elf.splt->contents | |
4443 | + htab->lazy_plt->plt0_got1_offset)); | |
4444 | /* Add offset for the PC-relative instruction accessing | |
4445 | GOT+16, subtracting the offset to the end of that | |
4446 | instruction. */ | |
4447 | bfd_put_32 (output_bfd, | |
4448 | (htab->elf.sgotplt->output_section->vma | |
4449 | + htab->elf.sgotplt->output_offset | |
4450 | + 16 | |
4451 | - htab->elf.splt->output_section->vma | |
4452 | - htab->elf.splt->output_offset | |
4453 | - htab->lazy_plt->plt0_got2_insn_end), | |
4454 | (htab->elf.splt->contents | |
4455 | + htab->lazy_plt->plt0_got2_offset)); | |
fff53dae | 4456 | } |
fff53dae | 4457 | |
9577f60b | 4458 | if (htab->tlsdesc_plt) |
8361ed4d | 4459 | { |
9577f60b L |
4460 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
4461 | htab->elf.sgot->contents + htab->tlsdesc_got); | |
4462 | ||
4463 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, | |
92e68c1d L |
4464 | htab->lazy_plt->plt_tlsdesc_entry, |
4465 | htab->lazy_plt->plt_tlsdesc_entry_size); | |
9577f60b | 4466 | |
bf54968b L |
4467 | /* Add offset for pushq GOT+8(%rip), since ENDBR64 uses 4 |
4468 | bytes and the instruction uses 6 bytes, subtract these | |
4469 | values. */ | |
9577f60b L |
4470 | bfd_put_32 (output_bfd, |
4471 | (htab->elf.sgotplt->output_section->vma | |
4472 | + htab->elf.sgotplt->output_offset | |
4473 | + 8 | |
4474 | - htab->elf.splt->output_section->vma | |
4475 | - htab->elf.splt->output_offset | |
4476 | - htab->tlsdesc_plt | |
92e68c1d | 4477 | - htab->lazy_plt->plt_tlsdesc_got1_insn_end), |
9577f60b L |
4478 | (htab->elf.splt->contents |
4479 | + htab->tlsdesc_plt | |
92e68c1d | 4480 | + htab->lazy_plt->plt_tlsdesc_got1_offset)); |
bf54968b L |
4481 | /* Add offset for indirect branch via GOT+TDG, where TDG |
4482 | stands for htab->tlsdesc_got, subtracting the offset | |
4483 | to the end of that instruction. */ | |
9577f60b L |
4484 | bfd_put_32 (output_bfd, |
4485 | (htab->elf.sgot->output_section->vma | |
4486 | + htab->elf.sgot->output_offset | |
4487 | + htab->tlsdesc_got | |
4488 | - htab->elf.splt->output_section->vma | |
4489 | - htab->elf.splt->output_offset | |
4490 | - htab->tlsdesc_plt | |
92e68c1d | 4491 | - htab->lazy_plt->plt_tlsdesc_got2_insn_end), |
9577f60b | 4492 | (htab->elf.splt->contents |
92e68c1d L |
4493 | + htab->tlsdesc_plt |
4494 | + htab->lazy_plt->plt_tlsdesc_got2_offset)); | |
8361ed4d L |
4495 | } |
4496 | } | |
4497 | ||
aec6b87e L |
4498 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
4499 | if (bfd_link_pie (info)) | |
4500 | bfd_hash_traverse (&info->hash->table, | |
4501 | elf_x86_64_pie_finish_undefweak_symbol, | |
4502 | info); | |
4503 | ||
b34976b6 | 4504 | return TRUE; |
8d88c4ca NC |
4505 | } |
4506 | ||
233cc9c1 L |
4507 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
4508 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
4509 | It has to be done before elf_link_sort_relocs is called so that | |
4510 | dynamic relocations are properly sorted. */ | |
4511 | ||
4512 | static bfd_boolean | |
4513 | elf_x86_64_output_arch_local_syms | |
4514 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
4515 | struct bfd_link_info *info, | |
4516 | void *flaginfo ATTRIBUTE_UNUSED, | |
4517 | int (*func) (void *, const char *, | |
4518 | Elf_Internal_Sym *, | |
4519 | asection *, | |
4520 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
4521 | { | |
0afcef53 L |
4522 | struct elf_x86_link_hash_table *htab |
4523 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
233cc9c1 L |
4524 | if (htab == NULL) |
4525 | return FALSE; | |
4526 | ||
4527 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
4528 | htab_traverse (htab->loc_hash_table, | |
4529 | elf_x86_64_finish_local_dynamic_symbol, | |
4530 | info); | |
4531 | ||
4532 | return TRUE; | |
4533 | } | |
4534 | ||
38b12349 | 4535 | /* Forward declaration. */ |
765e526c | 4536 | static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt; |
38b12349 L |
4537 | |
4538 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all | |
4539 | dynamic relocations. */ | |
4540 | ||
4541 | static long | |
4542 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
4543 | long symcount ATTRIBUTE_UNUSED, | |
4544 | asymbol **syms ATTRIBUTE_UNUSED, | |
4545 | long dynsymcount, | |
4546 | asymbol **dynsyms, | |
4547 | asymbol **ret) | |
4548 | { | |
f493882d | 4549 | long count, i, n; |
38b12349 | 4550 | int j; |
38b12349 | 4551 | bfd_byte *plt_contents; |
f493882d | 4552 | long relsize; |
765e526c L |
4553 | const struct elf_x86_lazy_plt_layout *lazy_plt; |
4554 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
4555 | const struct elf_x86_lazy_plt_layout *lazy_bnd_plt; | |
4556 | const struct elf_x86_non_lazy_plt_layout *non_lazy_bnd_plt; | |
4557 | const struct elf_x86_lazy_plt_layout *lazy_ibt_plt; | |
4558 | const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt; | |
38b12349 | 4559 | asection *plt; |
f493882d L |
4560 | enum elf_x86_plt_type plt_type; |
4561 | struct elf_x86_plt plts[] = | |
144bed8d | 4562 | { |
38b12349 L |
4563 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
4564 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
f2c29a16 L |
4565 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, |
4566 | { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
dd9e66ee | 4567 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } |
38b12349 | 4568 | }; |
144bed8d | 4569 | |
38b12349 | 4570 | *ret = NULL; |
144bed8d | 4571 | |
38b12349 L |
4572 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
4573 | return 0; | |
144bed8d | 4574 | |
38b12349 L |
4575 | if (dynsymcount <= 0) |
4576 | return 0; | |
cca5b8b6 | 4577 | |
38b12349 L |
4578 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
4579 | if (relsize <= 0) | |
4580 | return -1; | |
4581 | ||
3b4c3844 | 4582 | if (get_elf_x86_backend_data (abfd)->target_os != is_nacl) |
144bed8d | 4583 | { |
38b12349 L |
4584 | lazy_plt = &elf_x86_64_lazy_plt; |
4585 | non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
4586 | lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt; | |
4587 | non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt; | |
ee2fdd6f L |
4588 | if (ABI_64_P (abfd)) |
4589 | { | |
4590 | lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; | |
4591 | non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
4592 | } | |
4593 | else | |
4594 | { | |
4595 | lazy_ibt_plt = &elf_x32_lazy_ibt_plt; | |
4596 | non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
4597 | } | |
38b12349 L |
4598 | } |
4599 | else | |
4600 | { | |
4601 | lazy_plt = &elf_x86_64_nacl_plt; | |
4602 | non_lazy_plt = NULL; | |
4603 | lazy_bnd_plt = NULL; | |
4604 | non_lazy_bnd_plt = NULL; | |
ee2fdd6f L |
4605 | lazy_ibt_plt = NULL; |
4606 | non_lazy_ibt_plt = NULL; | |
38b12349 | 4607 | } |
144bed8d | 4608 | |
38b12349 L |
4609 | count = 0; |
4610 | for (j = 0; plts[j].name != NULL; j++) | |
4611 | { | |
4612 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
90efb642 | 4613 | if (plt == NULL || plt->size == 0) |
6f25f223 | 4614 | continue; |
533d0af0 | 4615 | |
38b12349 L |
4616 | /* Get the PLT section contents. */ |
4617 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
4618 | if (plt_contents == NULL) | |
4619 | break; | |
4620 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
4621 | plt_contents, 0, plt->size)) | |
4622 | { | |
4623 | free (plt_contents); | |
4624 | break; | |
4625 | } | |
144bed8d | 4626 | |
38b12349 L |
4627 | /* Check what kind of PLT it is. */ |
4628 | plt_type = plt_unknown; | |
90efb642 L |
4629 | if (plts[j].type == plt_unknown |
4630 | && (plt->size >= (lazy_plt->plt_entry_size | |
4631 | + lazy_plt->plt_entry_size))) | |
144bed8d | 4632 | { |
38b12349 L |
4633 | /* Match lazy PLT first. Need to check the first two |
4634 | instructions. */ | |
4635 | if ((memcmp (plt_contents, lazy_plt->plt0_entry, | |
4636 | lazy_plt->plt0_got1_offset) == 0) | |
4637 | && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6, | |
4638 | 2) == 0)) | |
4639 | plt_type = plt_lazy; | |
4640 | else if (lazy_bnd_plt != NULL | |
4641 | && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry, | |
4642 | lazy_bnd_plt->plt0_got1_offset) == 0) | |
4643 | && (memcmp (plt_contents + 6, | |
4644 | lazy_bnd_plt->plt0_entry + 6, 3) == 0)) | |
ec1f73bb | 4645 | { |
f2c29a16 | 4646 | plt_type = plt_lazy | plt_second; |
ee2fdd6f L |
4647 | /* The fist entry in the lazy IBT PLT is the same as the |
4648 | lazy BND PLT. */ | |
4649 | if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size, | |
4650 | lazy_ibt_plt->plt_entry, | |
4651 | lazy_ibt_plt->plt_got_offset) == 0)) | |
4652 | lazy_plt = lazy_ibt_plt; | |
4653 | else | |
4654 | lazy_plt = lazy_bnd_plt; | |
ec1f73bb | 4655 | } |
144bed8d | 4656 | } |
fca6ae69 | 4657 | |
38b12349 | 4658 | if (non_lazy_plt != NULL |
90efb642 L |
4659 | && (plt_type == plt_unknown || plt_type == plt_non_lazy) |
4660 | && plt->size >= non_lazy_plt->plt_entry_size) | |
38b12349 L |
4661 | { |
4662 | /* Match non-lazy PLT. */ | |
4663 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
4664 | non_lazy_plt->plt_got_offset) == 0) | |
4665 | plt_type = plt_non_lazy; | |
4666 | } | |
4667 | ||
ee2fdd6f | 4668 | if (plt_type == plt_unknown || plt_type == plt_second) |
38b12349 | 4669 | { |
ee2fdd6f | 4670 | if (non_lazy_bnd_plt != NULL |
90efb642 | 4671 | && plt->size >= non_lazy_bnd_plt->plt_entry_size |
ee2fdd6f L |
4672 | && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry, |
4673 | non_lazy_bnd_plt->plt_got_offset) == 0)) | |
38b12349 | 4674 | { |
ee2fdd6f | 4675 | /* Match BND PLT. */ |
f2c29a16 | 4676 | plt_type = plt_second; |
38b12349 L |
4677 | non_lazy_plt = non_lazy_bnd_plt; |
4678 | } | |
ee2fdd6f | 4679 | else if (non_lazy_ibt_plt != NULL |
90efb642 | 4680 | && plt->size >= non_lazy_ibt_plt->plt_entry_size |
ee2fdd6f L |
4681 | && (memcmp (plt_contents, |
4682 | non_lazy_ibt_plt->plt_entry, | |
4683 | non_lazy_ibt_plt->plt_got_offset) == 0)) | |
4684 | { | |
4685 | /* Match IBT PLT. */ | |
4686 | plt_type = plt_second; | |
4687 | non_lazy_plt = non_lazy_ibt_plt; | |
4688 | } | |
38b12349 L |
4689 | } |
4690 | ||
4691 | if (plt_type == plt_unknown) | |
37c0b6ee L |
4692 | { |
4693 | free (plt_contents); | |
4694 | continue; | |
4695 | } | |
38b12349 L |
4696 | |
4697 | plts[j].sec = plt; | |
4698 | plts[j].type = plt_type; | |
4699 | ||
4700 | if ((plt_type & plt_lazy)) | |
4701 | { | |
4702 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
4703 | plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size; | |
4704 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
4705 | /* Skip PLT0 in lazy PLT. */ | |
4706 | i = 1; | |
4707 | } | |
4708 | else | |
4709 | { | |
4710 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
4711 | plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size; | |
4712 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
4713 | i = 0; | |
4714 | } | |
4715 | ||
f2c29a16 L |
4716 | /* Skip lazy PLT when the second PLT is used. */ |
4717 | if (plt_type == (plt_lazy | plt_second)) | |
38b12349 L |
4718 | plts[j].count = 0; |
4719 | else | |
4720 | { | |
4721 | n = plt->size / plts[j].plt_entry_size; | |
4722 | plts[j].count = n; | |
4723 | count += n - i; | |
4724 | } | |
4725 | ||
4726 | plts[j].contents = plt_contents; | |
144bed8d L |
4727 | } |
4728 | ||
f493882d L |
4729 | return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize, |
4730 | (bfd_vma) 0, plts, dynsyms, | |
4731 | ret); | |
0ff2b86e L |
4732 | } |
4733 | ||
d2b2c203 DJ |
4734 | /* Handle an x86-64 specific section when reading an object file. This |
4735 | is called when elfcode.h finds a section with an unknown type. */ | |
4736 | ||
4737 | static bfd_boolean | |
0c723101 L |
4738 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
4739 | const char *name, int shindex) | |
d2b2c203 DJ |
4740 | { |
4741 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
4742 | return FALSE; | |
4743 | ||
6dc132d9 | 4744 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
4745 | return FALSE; |
4746 | ||
4747 | return TRUE; | |
4748 | } | |
4749 | ||
3b22753a L |
4750 | /* Hook called by the linker routine which adds symbols from an object |
4751 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
4752 | of .bss. */ | |
4753 | ||
4754 | static bfd_boolean | |
351f65ca | 4755 | elf_x86_64_add_symbol_hook (bfd *abfd, |
a43942db | 4756 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
351f65ca L |
4757 | Elf_Internal_Sym *sym, |
4758 | const char **namep ATTRIBUTE_UNUSED, | |
4759 | flagword *flagsp ATTRIBUTE_UNUSED, | |
4760 | asection **secp, | |
4761 | bfd_vma *valp) | |
3b22753a L |
4762 | { |
4763 | asection *lcomm; | |
4764 | ||
4765 | switch (sym->st_shndx) | |
4766 | { | |
4767 | case SHN_X86_64_LCOMMON: | |
4768 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
4769 | if (lcomm == NULL) | |
4770 | { | |
4771 | lcomm = bfd_make_section_with_flags (abfd, | |
4772 | "LARGE_COMMON", | |
4773 | (SEC_ALLOC | |
4774 | | SEC_IS_COMMON | |
4775 | | SEC_LINKER_CREATED)); | |
4776 | if (lcomm == NULL) | |
4777 | return FALSE; | |
4778 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
4779 | } | |
4780 | *secp = lcomm; | |
4781 | *valp = sym->st_size; | |
c35bdf6e | 4782 | return TRUE; |
3b22753a | 4783 | } |
d8045f23 | 4784 | |
3b22753a L |
4785 | return TRUE; |
4786 | } | |
4787 | ||
4788 | ||
4789 | /* Given a BFD section, try to locate the corresponding ELF section | |
4790 | index. */ | |
4791 | ||
4792 | static bfd_boolean | |
351f65ca L |
4793 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
4794 | asection *sec, int *index_return) | |
3b22753a L |
4795 | { |
4796 | if (sec == &_bfd_elf_large_com_section) | |
4797 | { | |
91d6fa6a | 4798 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
4799 | return TRUE; |
4800 | } | |
4801 | return FALSE; | |
4802 | } | |
4803 | ||
4804 | /* Process a symbol. */ | |
4805 | ||
4806 | static void | |
351f65ca L |
4807 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
4808 | asymbol *asym) | |
3b22753a L |
4809 | { |
4810 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
4811 | ||
4812 | switch (elfsym->internal_elf_sym.st_shndx) | |
4813 | { | |
4814 | case SHN_X86_64_LCOMMON: | |
4815 | asym->section = &_bfd_elf_large_com_section; | |
4816 | asym->value = elfsym->internal_elf_sym.st_size; | |
4817 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
4818 | asym->flags &= ~BSF_GLOBAL; | |
4819 | break; | |
4820 | } | |
4821 | } | |
4822 | ||
4823 | static bfd_boolean | |
351f65ca | 4824 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
4825 | { |
4826 | return (sym->st_shndx == SHN_COMMON | |
4827 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
4828 | } | |
4829 | ||
4830 | static unsigned int | |
351f65ca | 4831 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
4832 | { |
4833 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
4834 | return SHN_COMMON; | |
4835 | else | |
4836 | return SHN_X86_64_LCOMMON; | |
4837 | } | |
4838 | ||
4839 | static asection * | |
351f65ca | 4840 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
4841 | { |
4842 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
4843 | return bfd_com_section_ptr; | |
4844 | else | |
4845 | return &_bfd_elf_large_com_section; | |
4846 | } | |
4847 | ||
4848 | static bfd_boolean | |
5d13b3b3 AM |
4849 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
4850 | const Elf_Internal_Sym *sym, | |
351f65ca | 4851 | asection **psec, |
5d13b3b3 AM |
4852 | bfd_boolean newdef, |
4853 | bfd_boolean olddef, | |
351f65ca | 4854 | bfd *oldbfd, |
5d13b3b3 | 4855 | const asection *oldsec) |
3b22753a L |
4856 | { |
4857 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
4858 | normal common symbol. We turn the large common symbol into a |
4859 | normal one. */ | |
5d13b3b3 | 4860 | if (!olddef |
3b22753a | 4861 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
4862 | && !newdef |
4863 | && bfd_is_com_section (*psec) | |
4864 | && oldsec != *psec) | |
3b22753a | 4865 | { |
00492999 | 4866 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 4867 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
4868 | { |
4869 | h->root.u.c.p->section | |
4870 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
4871 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
4872 | } | |
4873 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
4874 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
4875 | *psec = bfd_com_section_ptr; | |
3b22753a L |
4876 | } |
4877 | ||
4878 | return TRUE; | |
4879 | } | |
4880 | ||
4881 | static int | |
351f65ca L |
4882 | elf_x86_64_additional_program_headers (bfd *abfd, |
4883 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
4884 | { |
4885 | asection *s; | |
9a2e389a | 4886 | int count = 0; |
3b22753a L |
4887 | |
4888 | /* Check to see if we need a large readonly segment. */ | |
4889 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
4890 | if (s && (s->flags & SEC_LOAD)) | |
4891 | count++; | |
4892 | ||
4893 | /* Check to see if we need a large data segment. Since .lbss sections | |
4894 | is placed right after the .bss section, there should be no need for | |
4895 | a large data segment just because of .lbss. */ | |
4896 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
4897 | if (s && (s->flags & SEC_LOAD)) | |
4898 | count++; | |
4899 | ||
4900 | return count; | |
4901 | } | |
4902 | ||
c543bf9a L |
4903 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
4904 | ||
4905 | static bfd_boolean | |
4906 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
4907 | const bfd_target *output) | |
4908 | { | |
4909 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
4910 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
4911 | && _bfd_elf_relocs_compatible (input, output)); | |
4912 | } | |
4913 | ||
38b12349 L |
4914 | /* Set up x86-64 GNU properties. Return the first relocatable ELF input |
4915 | with GNU properties if found. Otherwise, return NULL. */ | |
4916 | ||
4917 | static bfd * | |
4918 | elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info) | |
4919 | { | |
1de031c8 | 4920 | struct elf_x86_init_table init_table; |
ee2fdd6f | 4921 | |
78984959 L |
4922 | if ((int) R_X86_64_standard >= (int) R_X86_64_converted_reloc_bit |
4923 | || (int) R_X86_64_max <= (int) R_X86_64_converted_reloc_bit | |
4924 | || ((int) (R_X86_64_GNU_VTINHERIT | R_X86_64_converted_reloc_bit) | |
4925 | != (int) R_X86_64_GNU_VTINHERIT) | |
4926 | || ((int) (R_X86_64_GNU_VTENTRY | R_X86_64_converted_reloc_bit) | |
4927 | != (int) R_X86_64_GNU_VTENTRY)) | |
4928 | abort (); | |
4929 | ||
851b6fa1 L |
4930 | /* This is unused for x86-64. */ |
4931 | init_table.plt0_pad_byte = 0x90; | |
4932 | ||
3b4c3844 | 4933 | if (get_elf_x86_backend_data (info->output_bfd)->target_os != is_nacl) |
73784fa5 | 4934 | { |
a6798bab | 4935 | if (info->bndplt) |
ee2fdd6f | 4936 | { |
1de031c8 L |
4937 | init_table.lazy_plt = &elf_x86_64_lazy_bnd_plt; |
4938 | init_table.non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt; | |
ee2fdd6f L |
4939 | } |
4940 | else | |
4941 | { | |
1de031c8 L |
4942 | init_table.lazy_plt = &elf_x86_64_lazy_plt; |
4943 | init_table.non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
ee2fdd6f | 4944 | } |
38b12349 | 4945 | |
a6798bab | 4946 | if (ABI_64_P (info->output_bfd)) |
38b12349 | 4947 | { |
1de031c8 L |
4948 | init_table.lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; |
4949 | init_table.non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
38b12349 L |
4950 | } |
4951 | else | |
4952 | { | |
1de031c8 L |
4953 | init_table.lazy_ibt_plt = &elf_x32_lazy_ibt_plt; |
4954 | init_table.non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
38b12349 | 4955 | } |
38b12349 L |
4956 | } |
4957 | else | |
4958 | { | |
1de031c8 L |
4959 | init_table.lazy_plt = &elf_x86_64_nacl_plt; |
4960 | init_table.non_lazy_plt = NULL; | |
4961 | init_table.lazy_ibt_plt = NULL; | |
4962 | init_table.non_lazy_ibt_plt = NULL; | |
38b12349 L |
4963 | } |
4964 | ||
7a382c1c L |
4965 | if (ABI_64_P (info->output_bfd)) |
4966 | { | |
1de031c8 L |
4967 | init_table.r_info = elf64_r_info; |
4968 | init_table.r_sym = elf64_r_sym; | |
7a382c1c L |
4969 | } |
4970 | else | |
4971 | { | |
1de031c8 L |
4972 | init_table.r_info = elf32_r_info; |
4973 | init_table.r_sym = elf32_r_sym; | |
7a382c1c L |
4974 | } |
4975 | ||
1de031c8 | 4976 | return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table); |
38b12349 L |
4977 | } |
4978 | ||
9a2e389a | 4979 | static const struct bfd_elf_special_section |
46bed679 | 4980 | elf_x86_64_special_sections[]= |
3b22753a | 4981 | { |
0112cd26 NC |
4982 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
4983 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
4984 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
07d6d2b8 | 4985 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
0112cd26 NC |
4986 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
4987 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
07d6d2b8 | 4988 | { NULL, 0, 0, 0, 0 } |
3b22753a L |
4989 | }; |
4990 | ||
6d00b590 | 4991 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
4992 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
4993 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 4994 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 4995 | #define ELF_MACHINE_CODE EM_X86_64 |
f6aec96d L |
4996 | #if DEFAULT_LD_Z_SEPARATE_CODE |
4997 | # define ELF_MAXPAGESIZE 0x1000 | |
4998 | #else | |
4999 | # define ELF_MAXPAGESIZE 0x200000 | |
5000 | #endif | |
2043964e | 5001 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 5002 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
5003 | |
5004 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 5005 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
5006 | #define elf_backend_want_got_plt 1 |
5007 | #define elf_backend_plt_readonly 1 | |
5008 | #define elf_backend_want_plt_sym 0 | |
5009 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 5010 | #define elf_backend_rela_normal 1 |
07d6d2b8 | 5011 | #define elf_backend_plt_alignment 4 |
f7483970 | 5012 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 5013 | #define elf_backend_caches_rawsize 1 |
64f52338 | 5014 | #define elf_backend_dtrel_excludes_plt 1 |
5474d94f | 5015 | #define elf_backend_want_dynrelro 1 |
70256ad8 | 5016 | |
351f65ca | 5017 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 5018 | |
351f65ca | 5019 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 5020 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 5021 | elf_x86_64_reloc_name_lookup |
70256ad8 | 5022 | |
c543bf9a | 5023 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca | 5024 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
38b12349 | 5025 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
351f65ca L |
5026 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections |
5027 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
233cc9c1 | 5028 | #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms |
351f65ca L |
5029 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus |
5030 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
5031 | #ifdef CORE_HEADER |
5032 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
5033 | #endif | |
351f65ca L |
5034 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
5035 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
74541ad4 | 5036 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 5037 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
0ff2b86e | 5038 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 5039 | |
d2b2c203 | 5040 | #define elf_backend_section_from_shdr \ |
351f65ca | 5041 | elf_x86_64_section_from_shdr |
d2b2c203 | 5042 | |
3b22753a | 5043 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 5044 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 5045 | #define elf_backend_add_symbol_hook \ |
351f65ca | 5046 | elf_x86_64_add_symbol_hook |
3b22753a | 5047 | #define elf_backend_symbol_processing \ |
351f65ca | 5048 | elf_x86_64_symbol_processing |
3b22753a | 5049 | #define elf_backend_common_section_index \ |
351f65ca | 5050 | elf_x86_64_common_section_index |
3b22753a | 5051 | #define elf_backend_common_section \ |
351f65ca | 5052 | elf_x86_64_common_section |
3b22753a | 5053 | #define elf_backend_common_definition \ |
351f65ca | 5054 | elf_x86_64_common_definition |
3b22753a | 5055 | #define elf_backend_merge_symbol \ |
351f65ca | 5056 | elf_x86_64_merge_symbol |
3b22753a | 5057 | #define elf_backend_special_sections \ |
351f65ca | 5058 | elf_x86_64_special_sections |
3b22753a | 5059 | #define elf_backend_additional_program_headers \ |
351f65ca | 5060 | elf_x86_64_additional_program_headers |
38b12349 | 5061 | #define elf_backend_setup_gnu_properties \ |
9f857535 L |
5062 | elf_x86_64_link_setup_gnu_properties |
5063 | #define elf_backend_hide_symbol \ | |
5064 | _bfd_x86_elf_hide_symbol | |
3b22753a | 5065 | |
8f56f7a2 L |
5066 | #undef elf64_bed |
5067 | #define elf64_bed elf64_x86_64_bed | |
5068 | ||
8d88c4ca | 5069 | #include "elf64-target.h" |
9d7cbccd | 5070 | |
6036f486 ES |
5071 | /* CloudABI support. */ |
5072 | ||
07d6d2b8 | 5073 | #undef TARGET_LITTLE_SYM |
6036f486 | 5074 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec |
07d6d2b8 | 5075 | #undef TARGET_LITTLE_NAME |
6036f486 ES |
5076 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" |
5077 | ||
5078 | #undef ELF_OSABI | |
5079 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
5080 | ||
07d6d2b8 | 5081 | #undef elf64_bed |
6036f486 ES |
5082 | #define elf64_bed elf64_x86_64_cloudabi_bed |
5083 | ||
5084 | #include "elf64-target.h" | |
5085 | ||
9d7cbccd NC |
5086 | /* FreeBSD support. */ |
5087 | ||
07d6d2b8 | 5088 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5089 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
07d6d2b8 | 5090 | #undef TARGET_LITTLE_NAME |
9d7cbccd NC |
5091 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" |
5092 | ||
d1036acb L |
5093 | #undef ELF_OSABI |
5094 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 5095 | |
07d6d2b8 | 5096 | #undef elf64_bed |
9d7cbccd NC |
5097 | #define elf64_bed elf64_x86_64_fbsd_bed |
5098 | ||
5099 | #include "elf64-target.h" | |
8a9036a4 | 5100 | |
a6cc6b3b RO |
5101 | /* Solaris 2 support. */ |
5102 | ||
5103 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5104 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
5105 | #undef TARGET_LITTLE_NAME |
5106 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
5107 | ||
3b4c3844 L |
5108 | static const struct elf_x86_backend_data elf_x86_64_solaris_arch_bed = |
5109 | { | |
5110 | is_solaris /* os */ | |
5111 | }; | |
5112 | ||
5113 | #undef elf_backend_arch_data | |
5114 | #define elf_backend_arch_data &elf_x86_64_solaris_arch_bed | |
5115 | ||
a6cc6b3b RO |
5116 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE |
5117 | objects won't be recognized. */ | |
5118 | #undef ELF_OSABI | |
5119 | ||
5120 | #undef elf64_bed | |
5121 | #define elf64_bed elf64_x86_64_sol2_bed | |
5122 | ||
7dc98aea RO |
5123 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
5124 | boundary. */ | |
84865015 | 5125 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
5126 | #define elf_backend_static_tls_alignment 16 |
5127 | ||
a6cc6b3b RO |
5128 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
5129 | ||
5130 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
5131 | File, p.63. */ | |
84865015 | 5132 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
5133 | #define elf_backend_want_plt_sym 1 |
5134 | ||
84865015 NC |
5135 | #undef elf_backend_strtab_flags |
5136 | #define elf_backend_strtab_flags SHF_STRINGS | |
5137 | ||
5138 | static bfd_boolean | |
5522f910 NC |
5139 | elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
5140 | bfd *obfd ATTRIBUTE_UNUSED, | |
5141 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
5142 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
5143 | { |
5144 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
5145 | and sh_link fields of Solaris specific section types. */ | |
5146 | return FALSE; | |
5147 | } | |
5148 | ||
5522f910 NC |
5149 | #undef elf_backend_copy_special_section_fields |
5150 | #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields | |
84865015 | 5151 | |
a6cc6b3b RO |
5152 | #include "elf64-target.h" |
5153 | ||
8059fb19 RM |
5154 | /* Native Client support. */ |
5155 | ||
64b384e1 RM |
5156 | static bfd_boolean |
5157 | elf64_x86_64_nacl_elf_object_p (bfd *abfd) | |
5158 | { | |
5159 | /* Set the right machine number for a NaCl x86-64 ELF64 file. */ | |
5160 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl); | |
5161 | return TRUE; | |
5162 | } | |
5163 | ||
8059fb19 | 5164 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5165 | #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec |
8059fb19 RM |
5166 | #undef TARGET_LITTLE_NAME |
5167 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
5168 | #undef elf64_bed | |
5169 | #define elf64_bed elf64_x86_64_nacl_bed | |
5170 | ||
5171 | #undef ELF_MAXPAGESIZE | |
5172 | #undef ELF_MINPAGESIZE | |
5173 | #undef ELF_COMMONPAGESIZE | |
5174 | #define ELF_MAXPAGESIZE 0x10000 | |
5175 | #define ELF_MINPAGESIZE 0x10000 | |
5176 | #define ELF_COMMONPAGESIZE 0x10000 | |
5177 | ||
5178 | /* Restore defaults. */ | |
5179 | #undef ELF_OSABI | |
5180 | #undef elf_backend_static_tls_alignment | |
5181 | #undef elf_backend_want_plt_sym | |
5182 | #define elf_backend_want_plt_sym 0 | |
84865015 | 5183 | #undef elf_backend_strtab_flags |
5522f910 | 5184 | #undef elf_backend_copy_special_section_fields |
8059fb19 RM |
5185 | |
5186 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
5187 | ||
5188 | #undef elf_backend_plt_alignment | |
5189 | #define elf_backend_plt_alignment 5 | |
5190 | #define NACL_PLT_ENTRY_SIZE 64 | |
5191 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
5192 | ||
5193 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
5194 | { | |
07d6d2b8 | 5195 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
8059fb19 | 5196 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ |
07d6d2b8 AM |
5197 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ |
5198 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5199 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
8059fb19 | 5200 | |
ea2d813e | 5201 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
70cc877f | 5202 | 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */ |
ea2d813e RM |
5203 | |
5204 | /* 32 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 5205 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 5206 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 5207 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 5208 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
07d6d2b8 AM |
5209 | 0x66, /* excess data16 prefix */ |
5210 | 0x90 /* nop */ | |
8059fb19 RM |
5211 | }; |
5212 | ||
5213 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
5214 | { | |
5215 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
07d6d2b8 AM |
5216 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ |
5217 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5218 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
8059fb19 RM |
5219 | |
5220 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
3ddf1bdd | 5221 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
5222 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
5223 | ||
5224 | /* Lazy GOT entries point here (32-byte aligned). */ | |
07d6d2b8 AM |
5225 | 0x68, /* pushq immediate */ |
5226 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
5227 | 0xe9, /* jmp relative */ | |
5228 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
8059fb19 | 5229 | |
07d6d2b8 | 5230 | /* 22 bytes of nop to pad out to the standard size. */ |
3ddf1bdd | 5231 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 5232 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
07d6d2b8 | 5233 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ |
8059fb19 RM |
5234 | }; |
5235 | ||
5236 | /* .eh_frame covering the .plt section. */ | |
5237 | ||
5238 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
5239 | { | |
07d6d2b8 AM |
5240 | #if (PLT_CIE_LENGTH != 20 \ |
5241 | || PLT_FDE_LENGTH != 36 \ | |
5242 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
8059fb19 | 5243 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) |
851b6fa1 | 5244 | # error "Need elf_x86_backend_data parameters for eh_frame_plt offsets!" |
8059fb19 RM |
5245 | #endif |
5246 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
5247 | 0, 0, 0, 0, /* CIE ID */ | |
5248 | 1, /* CIE version */ | |
07d6d2b8 | 5249 | 'z', 'R', 0, /* Augmentation string */ |
8059fb19 | 5250 | 1, /* Code alignment factor */ |
07d6d2b8 | 5251 | 0x78, /* Data alignment factor */ |
8059fb19 RM |
5252 | 16, /* Return address column */ |
5253 | 1, /* Augmentation size */ | |
5254 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
5255 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
5256 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
5257 | DW_CFA_nop, DW_CFA_nop, | |
5258 | ||
5259 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
5260 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
5261 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
5262 | 0, 0, 0, 0, /* .plt size goes here */ | |
5263 | 0, /* Augmentation size */ | |
5264 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
5265 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
5266 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
5267 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
5268 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
5269 | 13, /* Block length */ | |
5270 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
5271 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
5272 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
5273 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
5274 | DW_CFA_nop, DW_CFA_nop | |
5275 | }; | |
5276 | ||
765e526c | 5277 | static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt = |
8059fb19 | 5278 | { |
07d6d2b8 AM |
5279 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ |
5280 | NACL_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
5281 | elf_x86_64_nacl_plt_entry, /* plt_entry */ | |
5282 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
5283 | elf_x86_64_nacl_plt0_entry, /* plt_tlsdesc_entry */ |
5284 | NACL_PLT_ENTRY_SIZE, /* plt_tlsdesc_entry_size */ | |
5285 | 2, /* plt_tlsdesc_got1_offset */ | |
5286 | 9, /* plt_tlsdesc_got2_offset */ | |
5287 | 6, /* plt_tlsdesc_got1_insn_end */ | |
5288 | 13, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
5289 | 2, /* plt0_got1_offset */ |
5290 | 9, /* plt0_got2_offset */ | |
5291 | 13, /* plt0_got2_insn_end */ | |
5292 | 3, /* plt_got_offset */ | |
5293 | 33, /* plt_reloc_offset */ | |
5294 | 38, /* plt_plt_offset */ | |
5295 | 7, /* plt_got_insn_size */ | |
5296 | 42, /* plt_plt_insn_end */ | |
5297 | 32, /* plt_lazy_offset */ | |
5298 | elf_x86_64_nacl_plt0_entry, /* pic_plt0_entry */ | |
5299 | elf_x86_64_nacl_plt_entry, /* pic_plt_entry */ | |
5300 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ | |
38b12349 L |
5301 | sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */ |
5302 | }; | |
5303 | ||
851b6fa1 | 5304 | static const struct elf_x86_backend_data elf_x86_64_nacl_arch_bed = |
38b12349 | 5305 | { |
07d6d2b8 | 5306 | is_nacl /* os */ |
8059fb19 RM |
5307 | }; |
5308 | ||
5309 | #undef elf_backend_arch_data | |
5310 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
5311 | ||
64b384e1 RM |
5312 | #undef elf_backend_object_p |
5313 | #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p | |
5a68afcf RM |
5314 | #undef elf_backend_modify_segment_map |
5315 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
5316 | #undef elf_backend_modify_program_headers | |
5317 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
5318 | #undef elf_backend_final_write_processing |
5319 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 5320 | |
8059fb19 RM |
5321 | #include "elf64-target.h" |
5322 | ||
5323 | /* Native Client x32 support. */ | |
5324 | ||
64b384e1 RM |
5325 | static bfd_boolean |
5326 | elf32_x86_64_nacl_elf_object_p (bfd *abfd) | |
5327 | { | |
5328 | /* Set the right machine number for a NaCl x86-64 ELF32 file. */ | |
5329 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl); | |
5330 | return TRUE; | |
5331 | } | |
5332 | ||
07d6d2b8 | 5333 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5334 | #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec |
07d6d2b8 | 5335 | #undef TARGET_LITTLE_NAME |
8059fb19 RM |
5336 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" |
5337 | #undef elf32_bed | |
5338 | #define elf32_bed elf32_x86_64_nacl_bed | |
5339 | ||
8059fb19 RM |
5340 | #define bfd_elf32_bfd_reloc_type_lookup \ |
5341 | elf_x86_64_reloc_type_lookup | |
5342 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
5343 | elf_x86_64_reloc_name_lookup | |
b7365e5d L |
5344 | #define bfd_elf32_get_synthetic_symtab \ |
5345 | elf_x86_64_get_synthetic_symtab | |
8059fb19 RM |
5346 | |
5347 | #undef elf_backend_object_p | |
5348 | #define elf_backend_object_p \ | |
64b384e1 | 5349 | elf32_x86_64_nacl_elf_object_p |
8059fb19 RM |
5350 | |
5351 | #undef elf_backend_bfd_from_remote_memory | |
5352 | #define elf_backend_bfd_from_remote_memory \ | |
5353 | _bfd_elf32_bfd_from_remote_memory | |
5354 | ||
5355 | #undef elf_backend_size_info | |
5356 | #define elf_backend_size_info \ | |
5357 | _bfd_elf32_size_info | |
5358 | ||
8f56f7a2 L |
5359 | #undef elf32_bed |
5360 | #define elf32_bed elf32_x86_64_bed | |
5361 | ||
8059fb19 RM |
5362 | #include "elf32-target.h" |
5363 | ||
5364 | /* Restore defaults. */ | |
5a68afcf | 5365 | #undef elf_backend_object_p |
8059fb19 | 5366 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
5367 | #undef elf_backend_bfd_from_remote_memory |
5368 | #undef elf_backend_size_info | |
5369 | #undef elf_backend_modify_segment_map | |
5370 | #undef elf_backend_modify_program_headers | |
887badb3 | 5371 | #undef elf_backend_final_write_processing |
8059fb19 | 5372 | |
8a9036a4 L |
5373 | /* Intel L1OM support. */ |
5374 | ||
5375 | static bfd_boolean | |
5376 | elf64_l1om_elf_object_p (bfd *abfd) | |
5377 | { | |
5378 | /* Set the right machine number for an L1OM elf64 file. */ | |
5379 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
5380 | return TRUE; | |
5381 | } | |
5382 | ||
5383 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5384 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
5385 | #undef TARGET_LITTLE_NAME |
5386 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
5387 | #undef ELF_ARCH | |
5388 | #define ELF_ARCH bfd_arch_l1om | |
5389 | ||
5390 | #undef ELF_MACHINE_CODE | |
5391 | #define ELF_MACHINE_CODE EM_L1OM | |
5392 | ||
5393 | #undef ELF_OSABI | |
5394 | ||
5395 | #undef elf64_bed | |
5396 | #define elf64_bed elf64_l1om_bed | |
5397 | ||
5398 | #undef elf_backend_object_p | |
5399 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
5400 | ||
8059fb19 RM |
5401 | /* Restore defaults. */ |
5402 | #undef ELF_MAXPAGESIZE | |
5403 | #undef ELF_MINPAGESIZE | |
5404 | #undef ELF_COMMONPAGESIZE | |
f6aec96d L |
5405 | #if DEFAULT_LD_Z_SEPARATE_CODE |
5406 | # define ELF_MAXPAGESIZE 0x1000 | |
5407 | #else | |
5408 | # define ELF_MAXPAGESIZE 0x200000 | |
5409 | #endif | |
8059fb19 RM |
5410 | #define ELF_MINPAGESIZE 0x1000 |
5411 | #define ELF_COMMONPAGESIZE 0x1000 | |
5412 | #undef elf_backend_plt_alignment | |
5413 | #define elf_backend_plt_alignment 4 | |
5414 | #undef elf_backend_arch_data | |
5415 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 5416 | |
8a9036a4 L |
5417 | #include "elf64-target.h" |
5418 | ||
5419 | /* FreeBSD L1OM support. */ | |
5420 | ||
5421 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5422 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
5423 | #undef TARGET_LITTLE_NAME |
5424 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
5425 | ||
5426 | #undef ELF_OSABI | |
5427 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5428 | ||
5429 | #undef elf64_bed | |
5430 | #define elf64_bed elf64_l1om_fbsd_bed | |
5431 | ||
8a9036a4 | 5432 | #include "elf64-target.h" |
351f65ca | 5433 | |
7a9068fe L |
5434 | /* Intel K1OM support. */ |
5435 | ||
5436 | static bfd_boolean | |
5437 | elf64_k1om_elf_object_p (bfd *abfd) | |
5438 | { | |
5439 | /* Set the right machine number for an K1OM elf64 file. */ | |
5440 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
5441 | return TRUE; | |
5442 | } | |
5443 | ||
5444 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5445 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
5446 | #undef TARGET_LITTLE_NAME |
5447 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
5448 | #undef ELF_ARCH | |
5449 | #define ELF_ARCH bfd_arch_k1om | |
5450 | ||
5451 | #undef ELF_MACHINE_CODE | |
5452 | #define ELF_MACHINE_CODE EM_K1OM | |
5453 | ||
5454 | #undef ELF_OSABI | |
5455 | ||
5456 | #undef elf64_bed | |
5457 | #define elf64_bed elf64_k1om_bed | |
5458 | ||
5459 | #undef elf_backend_object_p | |
5460 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
5461 | ||
5462 | #undef elf_backend_static_tls_alignment | |
5463 | ||
5464 | #undef elf_backend_want_plt_sym | |
5465 | #define elf_backend_want_plt_sym 0 | |
5466 | ||
5467 | #include "elf64-target.h" | |
5468 | ||
5469 | /* FreeBSD K1OM support. */ | |
5470 | ||
5471 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5472 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
5473 | #undef TARGET_LITTLE_NAME |
5474 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
5475 | ||
5476 | #undef ELF_OSABI | |
5477 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5478 | ||
5479 | #undef elf64_bed | |
5480 | #define elf64_bed elf64_k1om_fbsd_bed | |
5481 | ||
5482 | #include "elf64-target.h" | |
5483 | ||
351f65ca L |
5484 | /* 32bit x86-64 support. */ |
5485 | ||
351f65ca | 5486 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5487 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
5488 | #undef TARGET_LITTLE_NAME |
5489 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 5490 | #undef elf32_bed |
351f65ca L |
5491 | |
5492 | #undef ELF_ARCH | |
5493 | #define ELF_ARCH bfd_arch_i386 | |
5494 | ||
5495 | #undef ELF_MACHINE_CODE | |
5496 | #define ELF_MACHINE_CODE EM_X86_64 | |
5497 | ||
351f65ca L |
5498 | #undef ELF_OSABI |
5499 | ||
351f65ca L |
5500 | #undef elf_backend_object_p |
5501 | #define elf_backend_object_p \ | |
5502 | elf32_x86_64_elf_object_p | |
5503 | ||
5504 | #undef elf_backend_bfd_from_remote_memory | |
5505 | #define elf_backend_bfd_from_remote_memory \ | |
5506 | _bfd_elf32_bfd_from_remote_memory | |
5507 | ||
5508 | #undef elf_backend_size_info | |
5509 | #define elf_backend_size_info \ | |
5510 | _bfd_elf32_size_info | |
5511 | ||
5512 | #include "elf32-target.h" |