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351f65ca | 1 | /* X86-64 specific support for ELF |
2571583a | 2 | Copyright (C) 2000-2017 Free Software Foundation, Inc. |
8d88c4ca NC |
3 | Contributed by Jan Hubicka <jh@suse.cz>. |
4 | ||
ae9a127f | 5 | This file is part of BFD, the Binary File Descriptor library. |
8d88c4ca | 6 | |
ae9a127f NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
ae9a127f | 10 | (at your option) any later version. |
8d88c4ca | 11 | |
ae9a127f NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
8d88c4ca | 16 | |
ae9a127f NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
8d88c4ca | 21 | |
0afcef53 | 22 | #include "elfxx-x86.h" |
5a68afcf | 23 | #include "elf-nacl.h" |
e41b3a13 | 24 | #include "dwarf2.h" |
d7921315 | 25 | #include "libiberty.h" |
8d88c4ca | 26 | |
56ceb5b5 | 27 | #include "opcode/i386.h" |
8d88c4ca NC |
28 | #include "elf/x86-64.h" |
29 | ||
8fd79e71 L |
30 | #ifdef CORE_HEADER |
31 | #include <stdarg.h> | |
32 | #include CORE_HEADER | |
33 | #endif | |
34 | ||
8d88c4ca NC |
35 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
36 | #define MINUS_ONE (~ (bfd_vma) 0) | |
37 | ||
351f65ca L |
38 | /* Since both 32-bit and 64-bit x86-64 encode relocation type in the |
39 | identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get | |
40 | relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE | |
41 | since they are the same. */ | |
42 | ||
8d88c4ca | 43 | /* The relocation "howto" table. Order of fields: |
7b81dfbb AJ |
44 | type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow, |
45 | special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */ | |
70256ad8 AJ |
46 | static reloc_howto_type x86_64_elf_howto_table[] = |
47 | { | |
6346d5ca | 48 | HOWTO(R_X86_64_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont, |
b34976b6 AM |
49 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, |
50 | FALSE), | |
51 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
52 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, | |
53 | FALSE), | |
54 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
55 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, | |
56 | TRUE), | |
57 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
58 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, | |
59 | FALSE), | |
60 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
61 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, | |
62 | TRUE), | |
63 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
64 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, | |
65 | FALSE), | |
66 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
67 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, | |
68 | MINUS_ONE, FALSE), | |
69 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
70 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, | |
71 | MINUS_ONE, FALSE), | |
72 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
73 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, | |
74 | MINUS_ONE, FALSE), | |
75 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
76 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, | |
77 | 0xffffffff, TRUE), | |
78 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, | |
79 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
80 | FALSE), | |
81 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
82 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, | |
83 | FALSE), | |
84 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
85 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), | |
b0360d8c | 86 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
b34976b6 | 87 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), |
ac2aa337 | 88 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
b34976b6 AM |
89 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), |
90 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
91 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), | |
92 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
93 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, | |
94 | MINUS_ONE, FALSE), | |
95 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
96 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, | |
97 | MINUS_ONE, FALSE), | |
98 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
99 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, | |
100 | MINUS_ONE, FALSE), | |
101 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
102 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, | |
103 | 0xffffffff, TRUE), | |
104 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
105 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, | |
106 | 0xffffffff, TRUE), | |
ac2aa337 | 107 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
b34976b6 AM |
108 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, |
109 | 0xffffffff, FALSE), | |
110 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
111 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, | |
112 | 0xffffffff, TRUE), | |
113 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
114 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, | |
115 | 0xffffffff, FALSE), | |
d6ab8113 JB |
116 | HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
117 | bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE, | |
118 | TRUE), | |
119 | HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
120 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", | |
121 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
122 | HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
123 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", | |
124 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
7b81dfbb AJ |
125 | HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, |
126 | bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE, | |
127 | FALSE), | |
128 | HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
129 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE, | |
130 | MINUS_ONE, TRUE), | |
131 | HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
132 | bfd_elf_generic_reloc, "R_X86_64_GOTPC64", | |
133 | FALSE, MINUS_ONE, MINUS_ONE, TRUE), | |
134 | HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
135 | bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE, | |
136 | MINUS_ONE, FALSE), | |
137 | HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
138 | bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE, | |
139 | MINUS_ONE, FALSE), | |
1788fc08 L |
140 | HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, |
141 | bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff, | |
142 | FALSE), | |
143 | HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned, | |
144 | bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE, | |
145 | FALSE), | |
67a4f2b7 AO |
146 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0, |
147 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
148 | "R_X86_64_GOTPC32_TLSDESC", | |
149 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
150 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0, | |
151 | complain_overflow_dont, bfd_elf_generic_reloc, | |
152 | "R_X86_64_TLSDESC_CALL", | |
153 | FALSE, 0, 0, FALSE), | |
154 | HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0, | |
155 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
156 | "R_X86_64_TLSDESC", | |
157 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
cbe950e9 L |
158 | HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
159 | bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE, | |
160 | MINUS_ONE, FALSE), | |
64d25c44 L |
161 | HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
162 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE, | |
163 | MINUS_ONE, FALSE), | |
c3320543 L |
164 | HOWTO(R_X86_64_PC32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
165 | bfd_elf_generic_reloc, "R_X86_64_PC32_BND", FALSE, 0xffffffff, 0xffffffff, | |
166 | TRUE), | |
167 | HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
168 | bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", FALSE, 0xffffffff, 0xffffffff, | |
169 | TRUE), | |
56ceb5b5 L |
170 | HOWTO(R_X86_64_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
171 | bfd_elf_generic_reloc, "R_X86_64_GOTPCRELX", FALSE, 0xffffffff, | |
172 | 0xffffffff, TRUE), | |
173 | HOWTO(R_X86_64_REX_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
174 | bfd_elf_generic_reloc, "R_X86_64_REX_GOTPCRELX", FALSE, 0xffffffff, | |
175 | 0xffffffff, TRUE), | |
fe4770f4 | 176 | |
a33d77bc JB |
177 | /* We have a gap in the reloc numbers here. |
178 | R_X86_64_standard counts the number up to this point, and | |
179 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
180 | R_X86_64_GNU_VT* to form an index into this table. */ | |
56ceb5b5 | 181 | #define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1) |
a33d77bc JB |
182 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
183 | ||
fe4770f4 | 184 | /* GNU extension to record C++ vtable hierarchy. */ |
b34976b6 AM |
185 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
186 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
187 | |
188 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
189 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
190 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
d7921315 L |
191 | FALSE), |
192 | ||
193 | /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */ | |
194 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
195 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
196 | FALSE) | |
8d88c4ca NC |
197 | }; |
198 | ||
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 */ |
4eca0228 AM |
285 | _bfd_error_handler (_("%B: invalid relocation type %d"), |
286 | abfd, (int) r_type); | |
67a4f2b7 AO |
287 | r_type = R_X86_64_NONE; |
288 | } | |
289 | i = r_type; | |
290 | } | |
291 | else | |
292 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
293 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
294 | return &x86_64_elf_howto_table[i]; | |
295 | } | |
8d88c4ca NC |
296 | |
297 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
298 | static reloc_howto_type * | |
351f65ca L |
299 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
300 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
301 | { |
302 | unsigned int i; | |
27482721 | 303 | |
8d88c4ca NC |
304 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
305 | i++) | |
306 | { | |
307 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
308 | return elf_x86_64_rtype_to_howto (abfd, |
309 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca | 310 | } |
5860e3f8 | 311 | return NULL; |
8d88c4ca NC |
312 | } |
313 | ||
157090f7 | 314 | static reloc_howto_type * |
d7921315 | 315 | elf_x86_64_reloc_name_lookup (bfd *abfd, |
351f65ca | 316 | const char *r_name) |
157090f7 AM |
317 | { |
318 | unsigned int i; | |
319 | ||
d7921315 L |
320 | if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0) |
321 | { | |
322 | /* Get x32 R_X86_64_32. */ | |
323 | reloc_howto_type *reloc | |
324 | = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1]; | |
325 | BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32); | |
326 | return reloc; | |
327 | } | |
328 | ||
329 | for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++) | |
157090f7 AM |
330 | if (x86_64_elf_howto_table[i].name != NULL |
331 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
332 | return &x86_64_elf_howto_table[i]; | |
333 | ||
334 | return NULL; | |
335 | } | |
336 | ||
8d88c4ca | 337 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 338 | |
8d88c4ca | 339 | static void |
351f65ca L |
340 | elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
341 | Elf_Internal_Rela *dst) | |
8d88c4ca | 342 | { |
67a4f2b7 | 343 | unsigned r_type; |
8d88c4ca | 344 | |
351f65ca | 345 | r_type = ELF32_R_TYPE (dst->r_info); |
78984959 L |
346 | if (r_type != (unsigned int) R_X86_64_GNU_VTINHERIT |
347 | && r_type != (unsigned int) R_X86_64_GNU_VTENTRY) | |
348 | r_type &= ~R_X86_64_converted_reloc_bit; | |
351f65ca | 349 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); |
262c0a87 NC |
350 | |
351 | BFD_ASSERT (r_type == cache_ptr->howto->type || cache_ptr->howto->type == R_X86_64_NONE); | |
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 | |
442 | static char * | |
443 | elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz, | |
444 | int note_type, ...) | |
445 | { | |
446 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8fd79e71 L |
447 | va_list ap; |
448 | const char *fname, *psargs; | |
449 | long pid; | |
450 | int cursig; | |
451 | const void *gregs; | |
452 | ||
453 | switch (note_type) | |
454 | { | |
455 | default: | |
456 | return NULL; | |
457 | ||
458 | case NT_PRPSINFO: | |
459 | va_start (ap, note_type); | |
460 | fname = va_arg (ap, const char *); | |
461 | psargs = va_arg (ap, const char *); | |
462 | va_end (ap); | |
463 | ||
464 | if (bed->s->elfclass == ELFCLASS32) | |
465 | { | |
466 | prpsinfo32_t data; | |
467 | memset (&data, 0, sizeof (data)); | |
468 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
469 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
470 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
471 | &data, sizeof (data)); | |
8fd79e71 L |
472 | } |
473 | else | |
474 | { | |
b1bd052d | 475 | prpsinfo64_t data; |
8fd79e71 L |
476 | memset (&data, 0, sizeof (data)); |
477 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
478 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
479 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
480 | &data, sizeof (data)); | |
8fd79e71 | 481 | } |
e85c6a70 | 482 | /* NOTREACHED */ |
8fd79e71 L |
483 | |
484 | case NT_PRSTATUS: | |
485 | va_start (ap, note_type); | |
486 | pid = va_arg (ap, long); | |
487 | cursig = va_arg (ap, int); | |
488 | gregs = va_arg (ap, const void *); | |
489 | va_end (ap); | |
490 | ||
491 | if (bed->s->elfclass == ELFCLASS32) | |
492 | { | |
493 | if (bed->elf_machine_code == EM_X86_64) | |
494 | { | |
495 | prstatusx32_t prstat; | |
496 | memset (&prstat, 0, sizeof (prstat)); | |
497 | prstat.pr_pid = pid; | |
498 | prstat.pr_cursig = cursig; | |
499 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
500 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
501 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
502 | } |
503 | else | |
504 | { | |
505 | prstatus32_t prstat; | |
506 | memset (&prstat, 0, sizeof (prstat)); | |
507 | prstat.pr_pid = pid; | |
508 | prstat.pr_cursig = cursig; | |
509 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
510 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
511 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
512 | } |
513 | } | |
514 | else | |
515 | { | |
b1bd052d | 516 | prstatus64_t prstat; |
8fd79e71 L |
517 | memset (&prstat, 0, sizeof (prstat)); |
518 | prstat.pr_pid = pid; | |
519 | prstat.pr_cursig = cursig; | |
520 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
521 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
522 | &prstat, sizeof (prstat)); | |
8fd79e71 | 523 | } |
8fd79e71 | 524 | } |
e85c6a70 | 525 | /* NOTREACHED */ |
8fd79e71 L |
526 | } |
527 | #endif | |
3bab7989 | 528 | \f |
407443a3 | 529 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 530 | |
70256ad8 AJ |
531 | /* The size in bytes of an entry in the global offset table. */ |
532 | ||
533 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 534 | |
38b12349 | 535 | /* The size in bytes of an entry in the lazy procedure linkage table. */ |
8d88c4ca | 536 | |
38b12349 | 537 | #define LAZY_PLT_ENTRY_SIZE 16 |
70256ad8 | 538 | |
38b12349 L |
539 | /* The size in bytes of an entry in the non-lazy procedure linkage |
540 | table. */ | |
70256ad8 | 541 | |
38b12349 L |
542 | #define NON_LAZY_PLT_ENTRY_SIZE 8 |
543 | ||
544 | /* The first entry in a lazy procedure linkage table looks like this. | |
545 | See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this | |
546 | works. */ | |
547 | ||
548 | static const bfd_byte elf_x86_64_lazy_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
70256ad8 | 549 | { |
653165cc AJ |
550 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
551 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 552 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
553 | }; |
554 | ||
38b12349 | 555 | /* Subsequent entries in a lazy procedure linkage table look like this. */ |
70256ad8 | 556 | |
38b12349 | 557 | static const bfd_byte elf_x86_64_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
70256ad8 | 558 | { |
653165cc | 559 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 560 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 561 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
562 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
563 | 0xe9, /* jmp relative */ | |
564 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
565 | }; | |
566 | ||
38b12349 | 567 | /* The first entry in a lazy procedure linkage table with BND prefix |
0ff2b86e L |
568 | like this. */ |
569 | ||
38b12349 | 570 | static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e L |
571 | { |
572 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
573 | 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */ | |
574 | 0x0f, 0x1f, 0 /* nopl (%rax) */ | |
575 | }; | |
576 | ||
38b12349 L |
577 | /* Subsequent entries for branches with BND prefx in a lazy procedure |
578 | linkage table look like this. */ | |
0ff2b86e | 579 | |
38b12349 | 580 | static const bfd_byte elf_x86_64_lazy_bnd_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e L |
581 | { |
582 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
583 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
584 | 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */ | |
585 | }; | |
586 | ||
ee2fdd6f L |
587 | /* The first entry in the IBT-enabled lazy procedure linkage table is the |
588 | the same as the lazy PLT with BND prefix so that bound registers are | |
589 | preserved when control is passed to dynamic linker. Subsequent | |
590 | entries for a IBT-enabled lazy procedure linkage table look like | |
591 | this. */ | |
592 | ||
593 | static const bfd_byte elf_x86_64_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
594 | { | |
595 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
596 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
597 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
598 | 0x90 /* nop */ | |
599 | }; | |
600 | ||
601 | /* The first entry in the x32 IBT-enabled lazy procedure linkage table | |
de194d85 | 602 | is the same as the normal lazy PLT. Subsequent entries for an |
ee2fdd6f L |
603 | x32 IBT-enabled lazy procedure linkage table look like this. */ |
604 | ||
605 | static const bfd_byte elf_x32_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
606 | { | |
607 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
608 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
609 | 0xe9, 0, 0, 0, 0, /* jmpq relative */ | |
610 | 0x66, 0x90 /* xchg %ax,%ax */ | |
611 | }; | |
612 | ||
38b12349 | 613 | /* Entries in the non-lazey procedure linkage table look like this. */ |
0ff2b86e | 614 | |
38b12349 | 615 | static const bfd_byte elf_x86_64_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 616 | { |
38b12349 L |
617 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
618 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
619 | 0x66, 0x90 /* xchg %ax,%ax */ | |
0ff2b86e L |
620 | }; |
621 | ||
38b12349 L |
622 | /* Entries for branches with BND prefix in the non-lazey procedure |
623 | linkage table look like this. */ | |
0ff2b86e | 624 | |
38b12349 | 625 | static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 626 | { |
38b12349 L |
627 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ |
628 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
629 | 0x90 /* nop */ | |
0ff2b86e L |
630 | }; |
631 | ||
ee2fdd6f L |
632 | /* Entries for branches with IBT-enabled in the non-lazey procedure |
633 | linkage table look like this. They have the same size as the lazy | |
634 | PLT entry. */ | |
635 | ||
636 | static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
637 | { | |
638 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
639 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ | |
640 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
641 | 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */ | |
642 | }; | |
643 | ||
644 | /* Entries for branches with IBT-enabled in the x32 non-lazey procedure | |
645 | linkage table look like this. They have the same size as the lazy | |
646 | PLT entry. */ | |
647 | ||
648 | static const bfd_byte elf_x32_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
649 | { | |
650 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
651 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ | |
652 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
653 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
654 | }; | |
655 | ||
38b12349 | 656 | /* .eh_frame covering the lazy .plt section. */ |
e41b3a13 | 657 | |
38b12349 | 658 | static const bfd_byte elf_x86_64_eh_frame_lazy_plt[] = |
e41b3a13 | 659 | { |
e41b3a13 JJ |
660 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ |
661 | 0, 0, 0, 0, /* CIE ID */ | |
662 | 1, /* CIE version */ | |
663 | 'z', 'R', 0, /* Augmentation string */ | |
664 | 1, /* Code alignment factor */ | |
665 | 0x78, /* Data alignment factor */ | |
666 | 16, /* Return address column */ | |
667 | 1, /* Augmentation size */ | |
668 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
669 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
670 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
671 | DW_CFA_nop, DW_CFA_nop, | |
672 | ||
673 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
674 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
675 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
676 | 0, 0, 0, 0, /* .plt size goes here */ | |
677 | 0, /* Augmentation size */ | |
678 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
679 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
680 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
681 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
682 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
683 | 11, /* Block length */ | |
684 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
685 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
686 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
687 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
688 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
689 | }; | |
690 | ||
38b12349 | 691 | /* .eh_frame covering the lazy BND .plt section. */ |
9e659176 | 692 | |
38b12349 | 693 | static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt[] = |
9e659176 L |
694 | { |
695 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
696 | 0, 0, 0, 0, /* CIE ID */ | |
697 | 1, /* CIE version */ | |
698 | 'z', 'R', 0, /* Augmentation string */ | |
699 | 1, /* Code alignment factor */ | |
700 | 0x78, /* Data alignment factor */ | |
701 | 16, /* Return address column */ | |
702 | 1, /* Augmentation size */ | |
703 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
704 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
705 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
706 | DW_CFA_nop, DW_CFA_nop, | |
707 | ||
708 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
709 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
710 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
711 | 0, 0, 0, 0, /* .plt size goes here */ | |
712 | 0, /* Augmentation size */ | |
713 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
714 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
715 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
716 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
717 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
718 | 11, /* Block length */ | |
719 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
720 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
721 | DW_OP_lit15, DW_OP_and, DW_OP_lit5, DW_OP_ge, | |
722 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
723 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
724 | }; | |
725 | ||
ee2fdd6f L |
726 | /* .eh_frame covering the lazy .plt section with IBT-enabled. */ |
727 | ||
728 | static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt[] = | |
729 | { | |
730 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
731 | 0, 0, 0, 0, /* CIE ID */ | |
732 | 1, /* CIE version */ | |
733 | 'z', 'R', 0, /* Augmentation string */ | |
734 | 1, /* Code alignment factor */ | |
735 | 0x78, /* Data alignment factor */ | |
736 | 16, /* Return address column */ | |
737 | 1, /* Augmentation size */ | |
738 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
739 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
740 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
741 | DW_CFA_nop, DW_CFA_nop, | |
742 | ||
743 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
744 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
745 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
746 | 0, 0, 0, 0, /* .plt size goes here */ | |
747 | 0, /* Augmentation size */ | |
748 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
749 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
750 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
751 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
752 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
753 | 11, /* Block length */ | |
754 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
755 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
756 | DW_OP_lit15, DW_OP_and, DW_OP_lit10, DW_OP_ge, | |
757 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
758 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
759 | }; | |
760 | ||
761 | /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */ | |
762 | ||
763 | static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt[] = | |
764 | { | |
765 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
766 | 0, 0, 0, 0, /* CIE ID */ | |
767 | 1, /* CIE version */ | |
768 | 'z', 'R', 0, /* Augmentation string */ | |
769 | 1, /* Code alignment factor */ | |
770 | 0x78, /* Data alignment factor */ | |
771 | 16, /* Return address column */ | |
772 | 1, /* Augmentation size */ | |
773 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
774 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
775 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
776 | DW_CFA_nop, DW_CFA_nop, | |
777 | ||
778 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
779 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
780 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
781 | 0, 0, 0, 0, /* .plt size goes here */ | |
782 | 0, /* Augmentation size */ | |
783 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
784 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
785 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
786 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
787 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
788 | 11, /* Block length */ | |
789 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
790 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
791 | DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge, | |
792 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
793 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
794 | }; | |
795 | ||
38b12349 | 796 | /* .eh_frame covering the non-lazy .plt section. */ |
fff53dae | 797 | |
38b12349 | 798 | static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt[] = |
fff53dae L |
799 | { |
800 | #define PLT_GOT_FDE_LENGTH 20 | |
801 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
802 | 0, 0, 0, 0, /* CIE ID */ | |
803 | 1, /* CIE version */ | |
804 | 'z', 'R', 0, /* Augmentation string */ | |
805 | 1, /* Code alignment factor */ | |
806 | 0x78, /* Data alignment factor */ | |
807 | 16, /* Return address column */ | |
808 | 1, /* Augmentation size */ | |
809 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
810 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
811 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
812 | DW_CFA_nop, DW_CFA_nop, | |
813 | ||
814 | PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
815 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
38b12349 L |
816 | 0, 0, 0, 0, /* the start of non-lazy .plt goes here */ |
817 | 0, 0, 0, 0, /* non-lazy .plt size goes here */ | |
fff53dae L |
818 | 0, /* Augmentation size */ |
819 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, | |
820 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
821 | }; | |
822 | ||
eed180f8 | 823 | /* These are the standard parameters. */ |
765e526c | 824 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt = |
eed180f8 | 825 | { |
38b12349 | 826 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ |
765e526c | 827 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
38b12349 L |
828 | elf_x86_64_lazy_plt_entry, /* plt_entry */ |
829 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
eed180f8 RM |
830 | 2, /* plt0_got1_offset */ |
831 | 8, /* plt0_got2_offset */ | |
832 | 12, /* plt0_got2_insn_end */ | |
833 | 2, /* plt_got_offset */ | |
834 | 7, /* plt_reloc_offset */ | |
835 | 12, /* plt_plt_offset */ | |
836 | 6, /* plt_got_insn_size */ | |
38b12349 | 837 | LAZY_PLT_ENTRY_SIZE, /* plt_plt_insn_end */ |
eed180f8 | 838 | 6, /* plt_lazy_offset */ |
a6798bab L |
839 | elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */ |
840 | elf_x86_64_lazy_plt_entry, /* pic_plt_entry */ | |
38b12349 L |
841 | elf_x86_64_eh_frame_lazy_plt, /* eh_frame_plt */ |
842 | sizeof (elf_x86_64_eh_frame_lazy_plt) /* eh_frame_plt_size */ | |
843 | }; | |
844 | ||
765e526c | 845 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_plt = |
38b12349 L |
846 | { |
847 | elf_x86_64_non_lazy_plt_entry, /* plt_entry */ | |
a6798bab | 848 | elf_x86_64_non_lazy_plt_entry, /* pic_plt_entry */ |
38b12349 L |
849 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
850 | 2, /* plt_got_offset */ | |
851 | 6, /* plt_got_insn_size */ | |
852 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
853 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
eed180f8 RM |
854 | }; |
855 | ||
765e526c | 856 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_bnd_plt = |
0ff2b86e | 857 | { |
38b12349 | 858 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ |
765e526c | 859 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
38b12349 L |
860 | elf_x86_64_lazy_bnd_plt_entry, /* plt_entry */ |
861 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
0ff2b86e L |
862 | 2, /* plt0_got1_offset */ |
863 | 1+8, /* plt0_got2_offset */ | |
864 | 1+12, /* plt0_got2_insn_end */ | |
865 | 1+2, /* plt_got_offset */ | |
866 | 1, /* plt_reloc_offset */ | |
867 | 7, /* plt_plt_offset */ | |
868 | 1+6, /* plt_got_insn_size */ | |
869 | 11, /* plt_plt_insn_end */ | |
870 | 0, /* plt_lazy_offset */ | |
a6798bab L |
871 | elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */ |
872 | elf_x86_64_lazy_bnd_plt_entry, /* pic_plt_entry */ | |
38b12349 L |
873 | elf_x86_64_eh_frame_lazy_bnd_plt, /* eh_frame_plt */ |
874 | sizeof (elf_x86_64_eh_frame_lazy_bnd_plt) /* eh_frame_plt_size */ | |
875 | }; | |
876 | ||
765e526c | 877 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt = |
38b12349 L |
878 | { |
879 | elf_x86_64_non_lazy_bnd_plt_entry, /* plt_entry */ | |
a6798bab | 880 | elf_x86_64_non_lazy_bnd_plt_entry, /* pic_plt_entry */ |
38b12349 L |
881 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
882 | 1+2, /* plt_got_offset */ | |
883 | 1+6, /* plt_got_insn_size */ | |
884 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
885 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
886 | }; | |
887 | ||
765e526c | 888 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt = |
ee2fdd6f L |
889 | { |
890 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ | |
765e526c | 891 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
ee2fdd6f L |
892 | elf_x86_64_lazy_ibt_plt_entry, /* plt_entry */ |
893 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
894 | 2, /* plt0_got1_offset */ | |
895 | 1+8, /* plt0_got2_offset */ | |
896 | 1+12, /* plt0_got2_insn_end */ | |
897 | 4+1+2, /* plt_got_offset */ | |
898 | 4+1, /* plt_reloc_offset */ | |
899 | 4+1+6, /* plt_plt_offset */ | |
900 | 4+1+6, /* plt_got_insn_size */ | |
901 | 4+1+5+5, /* plt_plt_insn_end */ | |
902 | 0, /* plt_lazy_offset */ | |
a6798bab L |
903 | elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */ |
904 | elf_x86_64_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
ee2fdd6f L |
905 | elf_x86_64_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ |
906 | sizeof (elf_x86_64_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ | |
907 | }; | |
908 | ||
765e526c | 909 | static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt = |
ee2fdd6f L |
910 | { |
911 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ | |
765e526c | 912 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
ee2fdd6f L |
913 | elf_x32_lazy_ibt_plt_entry, /* plt_entry */ |
914 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
915 | 2, /* plt0_got1_offset */ | |
916 | 8, /* plt0_got2_offset */ | |
917 | 12, /* plt0_got2_insn_end */ | |
918 | 4+2, /* plt_got_offset */ | |
919 | 4+1, /* plt_reloc_offset */ | |
920 | 4+6, /* plt_plt_offset */ | |
921 | 4+6, /* plt_got_insn_size */ | |
922 | 4+5+5, /* plt_plt_insn_end */ | |
923 | 0, /* plt_lazy_offset */ | |
a6798bab L |
924 | elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */ |
925 | elf_x32_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
ee2fdd6f L |
926 | elf_x32_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ |
927 | sizeof (elf_x32_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ | |
928 | }; | |
929 | ||
765e526c | 930 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt = |
ee2fdd6f L |
931 | { |
932 | elf_x86_64_non_lazy_ibt_plt_entry, /* plt_entry */ | |
a6798bab | 933 | elf_x86_64_non_lazy_ibt_plt_entry, /* pic_plt_entry */ |
ee2fdd6f L |
934 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
935 | 4+1+2, /* plt_got_offset */ | |
936 | 4+1+6, /* plt_got_insn_size */ | |
937 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
938 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
939 | }; | |
940 | ||
765e526c | 941 | static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt = |
ee2fdd6f L |
942 | { |
943 | elf_x32_non_lazy_ibt_plt_entry, /* plt_entry */ | |
a6798bab | 944 | elf_x32_non_lazy_ibt_plt_entry, /* pic_plt_entry */ |
ee2fdd6f L |
945 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
946 | 4+2, /* plt_got_offset */ | |
947 | 4+6, /* plt_got_insn_size */ | |
948 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
949 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
950 | }; | |
951 | ||
851b6fa1 | 952 | static const struct elf_x86_backend_data elf_x86_64_arch_bed = |
38b12349 L |
953 | { |
954 | is_normal /* os */ | |
0ff2b86e L |
955 | }; |
956 | ||
eed180f8 RM |
957 | #define elf_backend_arch_data &elf_x86_64_arch_bed |
958 | ||
b34976b6 | 959 | static bfd_boolean |
27482721 | 960 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 961 | { |
8d88c4ca NC |
962 | /* Set the right machine number for an x86-64 elf64 file. */ |
963 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 964 | return TRUE; |
8d88c4ca NC |
965 | } |
966 | ||
8059fb19 RM |
967 | static bfd_boolean |
968 | elf32_x86_64_elf_object_p (bfd *abfd) | |
969 | { | |
970 | /* Set the right machine number for an x86-64 elf32 file. */ | |
971 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
972 | return TRUE; | |
973 | } | |
974 | ||
142411ca L |
975 | /* Return TRUE if the TLS access code sequence support transition |
976 | from R_TYPE. */ | |
977 | ||
978 | static bfd_boolean | |
351f65ca L |
979 | elf_x86_64_check_tls_transition (bfd *abfd, |
980 | struct bfd_link_info *info, | |
981 | asection *sec, | |
982 | bfd_byte *contents, | |
983 | Elf_Internal_Shdr *symtab_hdr, | |
984 | struct elf_link_hash_entry **sym_hashes, | |
985 | unsigned int r_type, | |
986 | const Elf_Internal_Rela *rel, | |
987 | const Elf_Internal_Rela *relend) | |
bffbf940 | 988 | { |
142411ca L |
989 | unsigned int val; |
990 | unsigned long r_symndx; | |
5c98a14e | 991 | bfd_boolean largepic = FALSE; |
142411ca L |
992 | struct elf_link_hash_entry *h; |
993 | bfd_vma offset; | |
0afcef53 | 994 | struct elf_x86_link_hash_table *htab; |
e2cbcd91 | 995 | bfd_byte *call; |
1d4af308 | 996 | bfd_boolean indirect_call; |
142411ca | 997 | |
0afcef53 | 998 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
142411ca | 999 | offset = rel->r_offset; |
bffbf940 | 1000 | switch (r_type) |
142411ca L |
1001 | { |
1002 | case R_X86_64_TLSGD: | |
1003 | case R_X86_64_TLSLD: | |
1004 | if ((rel + 1) >= relend) | |
1005 | return FALSE; | |
1006 | ||
1007 | if (r_type == R_X86_64_TLSGD) | |
1008 | { | |
52bc799a | 1009 | /* Check transition from GD access model. For 64bit, only |
142411ca | 1010 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
e2cbcd91 L |
1011 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1012 | or | |
1013 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
1014 | .byte 0x66; rex64 | |
1015 | call *__tls_get_addr@GOTPCREL(%rip) | |
1016 | which may be converted to | |
1017 | addr32 call __tls_get_addr | |
52bc799a L |
1018 | can transit to different access model. For 32bit, only |
1019 | leaq foo@tlsgd(%rip), %rdi | |
e2cbcd91 L |
1020 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1021 | or | |
1022 | leaq foo@tlsgd(%rip), %rdi | |
1023 | .byte 0x66; rex64 | |
1024 | call *__tls_get_addr@GOTPCREL(%rip) | |
1025 | which may be converted to | |
1026 | addr32 call __tls_get_addr | |
1027 | can transit to different access model. For largepic, | |
5c98a14e | 1028 | we also support: |
e2cbcd91 L |
1029 | leaq foo@tlsgd(%rip), %rdi |
1030 | movabsq $__tls_get_addr@pltoff, %rax | |
1031 | addq $r15, %rax | |
1032 | call *%rax | |
1033 | or | |
5c98a14e JJ |
1034 | leaq foo@tlsgd(%rip), %rdi |
1035 | movabsq $__tls_get_addr@pltoff, %rax | |
1036 | addq $rbx, %rax | |
e2cbcd91 | 1037 | call *%rax */ |
142411ca | 1038 | |
fa289a5f AM |
1039 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; |
1040 | ||
5c98a14e | 1041 | if ((offset + 12) > sec->size) |
142411ca | 1042 | return FALSE; |
52bc799a | 1043 | |
e2cbcd91 L |
1044 | call = contents + offset + 4; |
1045 | if (call[0] != 0x66 | |
1046 | || !((call[1] == 0x48 | |
1047 | && call[2] == 0xff | |
1048 | && call[3] == 0x15) | |
1049 | || (call[1] == 0x48 | |
1050 | && call[2] == 0x67 | |
1051 | && call[3] == 0xe8) | |
1052 | || (call[1] == 0x66 | |
1053 | && call[2] == 0x48 | |
1054 | && call[3] == 0xe8))) | |
5c98a14e JJ |
1055 | { |
1056 | if (!ABI_64_P (abfd) | |
1057 | || (offset + 19) > sec->size | |
1058 | || offset < 3 | |
e2cbcd91 L |
1059 | || memcmp (call - 7, leaq + 1, 3) != 0 |
1060 | || memcmp (call, "\x48\xb8", 2) != 0 | |
1061 | || call[11] != 0x01 | |
1062 | || call[13] != 0xff | |
1063 | || call[14] != 0xd0 | |
1064 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1065 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1066 | return FALSE; |
1067 | largepic = TRUE; | |
1068 | } | |
1069 | else if (ABI_64_P (abfd)) | |
52bc799a | 1070 | { |
52bc799a | 1071 | if (offset < 4 |
fa289a5f | 1072 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1073 | return FALSE; |
1074 | } | |
1075 | else | |
1076 | { | |
52bc799a | 1077 | if (offset < 3 |
fa289a5f | 1078 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1079 | return FALSE; |
1080 | } | |
e2cbcd91 | 1081 | indirect_call = call[2] == 0xff; |
142411ca L |
1082 | } |
1083 | else | |
1084 | { | |
1085 | /* Check transition from LD access model. Only | |
1086 | leaq foo@tlsld(%rip), %rdi; | |
e2cbcd91 L |
1087 | call __tls_get_addr@PLT |
1088 | or | |
1089 | leaq foo@tlsld(%rip), %rdi; | |
1090 | call *__tls_get_addr@GOTPCREL(%rip) | |
1091 | which may be converted to | |
1092 | addr32 call __tls_get_addr | |
5c98a14e JJ |
1093 | can transit to different access model. For largepic |
1094 | we also support: | |
e2cbcd91 L |
1095 | leaq foo@tlsld(%rip), %rdi |
1096 | movabsq $__tls_get_addr@pltoff, %rax | |
1097 | addq $r15, %rax | |
1098 | call *%rax | |
1099 | or | |
5c98a14e JJ |
1100 | leaq foo@tlsld(%rip), %rdi |
1101 | movabsq $__tls_get_addr@pltoff, %rax | |
1102 | addq $rbx, %rax | |
e2cbcd91 | 1103 | call *%rax */ |
142411ca | 1104 | |
fa289a5f | 1105 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1106 | |
1107 | if (offset < 3 || (offset + 9) > sec->size) | |
1108 | return FALSE; | |
1109 | ||
5c98a14e | 1110 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
142411ca | 1111 | return FALSE; |
5c98a14e | 1112 | |
e2cbcd91 L |
1113 | call = contents + offset + 4; |
1114 | if (!(call[0] == 0xe8 | |
1115 | || (call[0] == 0xff && call[1] == 0x15) | |
1116 | || (call[0] == 0x67 && call[1] == 0xe8))) | |
5c98a14e JJ |
1117 | { |
1118 | if (!ABI_64_P (abfd) | |
1119 | || (offset + 19) > sec->size | |
e2cbcd91 L |
1120 | || memcmp (call, "\x48\xb8", 2) != 0 |
1121 | || call[11] != 0x01 | |
1122 | || call[13] != 0xff | |
1123 | || call[14] != 0xd0 | |
1124 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1125 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1126 | return FALSE; |
1127 | largepic = TRUE; | |
1128 | } | |
e2cbcd91 | 1129 | indirect_call = call[0] == 0xff; |
142411ca L |
1130 | } |
1131 | ||
351f65ca | 1132 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1133 | if (r_symndx < symtab_hdr->sh_info) |
1134 | return FALSE; | |
1135 | ||
1136 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1d4af308 | 1137 | if (h == NULL |
0afcef53 | 1138 | || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr) |
e2cbcd91 | 1139 | return FALSE; |
e2cbcd91 | 1140 | else |
78984959 L |
1141 | { |
1142 | r_type = (ELF32_R_TYPE (rel[1].r_info) | |
1143 | & ~R_X86_64_converted_reloc_bit); | |
1144 | if (largepic) | |
1145 | return r_type == R_X86_64_PLTOFF64; | |
1146 | else if (indirect_call) | |
1147 | return r_type == R_X86_64_GOTPCRELX; | |
1148 | else | |
1149 | return (r_type == R_X86_64_PC32 || r_type == R_X86_64_PLT32); | |
1150 | } | |
142411ca L |
1151 | |
1152 | case R_X86_64_GOTTPOFF: | |
1153 | /* Check transition from IE access model: | |
4a4c5f25 L |
1154 | mov foo@gottpoff(%rip), %reg |
1155 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1156 | */ |
1157 | ||
4a4c5f25 L |
1158 | /* Check REX prefix first. */ |
1159 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1160 | { | |
1161 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1162 | if (val != 0x48 && val != 0x4c) | |
1163 | { | |
1164 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1165 | if (ABI_64_P (abfd)) | |
1166 | return FALSE; | |
1167 | } | |
1168 | } | |
1169 | else | |
1170 | { | |
1171 | /* X32 may not have any REX prefix. */ | |
1172 | if (ABI_64_P (abfd)) | |
1173 | return FALSE; | |
1174 | if (offset < 2 || (offset + 3) > sec->size) | |
1175 | return FALSE; | |
1176 | } | |
142411ca L |
1177 | |
1178 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1179 | if (val != 0x8b && val != 0x03) | |
1180 | return FALSE; | |
1181 | ||
1182 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1183 | return (val & 0xc7) == 5; | |
1184 | ||
1185 | case R_X86_64_GOTPC32_TLSDESC: | |
1186 | /* Check transition from GDesc access model: | |
1187 | leaq x@tlsdesc(%rip), %rax | |
1188 | ||
1189 | Make sure it's a leaq adding rip to a 32-bit offset | |
1190 | into any register, although it's probably almost always | |
1191 | going to be rax. */ | |
1192 | ||
1193 | if (offset < 3 || (offset + 4) > sec->size) | |
1194 | return FALSE; | |
1195 | ||
1196 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1197 | if ((val & 0xfb) != 0x48) | |
1198 | return FALSE; | |
1199 | ||
1200 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1201 | return FALSE; | |
1202 | ||
1203 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1204 | return (val & 0xc7) == 0x05; | |
1205 | ||
1206 | case R_X86_64_TLSDESC_CALL: | |
1207 | /* Check transition from GDesc access model: | |
1208 | call *x@tlsdesc(%rax) | |
1209 | */ | |
1210 | if (offset + 2 <= sec->size) | |
1211 | { | |
1212 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
e2cbcd91 L |
1213 | call = contents + offset; |
1214 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1215 | } |
1216 | ||
1217 | return FALSE; | |
1218 | ||
1219 | default: | |
1220 | abort (); | |
1221 | } | |
1222 | } | |
1223 | ||
1224 | /* Return TRUE if the TLS access transition is OK or no transition | |
1225 | will be performed. Update R_TYPE if there is a transition. */ | |
1226 | ||
1227 | static bfd_boolean | |
351f65ca L |
1228 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1229 | asection *sec, bfd_byte *contents, | |
1230 | Elf_Internal_Shdr *symtab_hdr, | |
1231 | struct elf_link_hash_entry **sym_hashes, | |
1232 | unsigned int *r_type, int tls_type, | |
1233 | const Elf_Internal_Rela *rel, | |
1234 | const Elf_Internal_Rela *relend, | |
1235 | struct elf_link_hash_entry *h, | |
bedfd056 L |
1236 | unsigned long r_symndx, |
1237 | bfd_boolean from_relocate_section) | |
142411ca L |
1238 | { |
1239 | unsigned int from_type = *r_type; | |
1240 | unsigned int to_type = from_type; | |
1241 | bfd_boolean check = TRUE; | |
1242 | ||
bb1cb422 L |
1243 | /* Skip TLS transition for functions. */ |
1244 | if (h != NULL | |
1245 | && (h->type == STT_FUNC | |
1246 | || h->type == STT_GNU_IFUNC)) | |
1247 | return TRUE; | |
1248 | ||
142411ca | 1249 | switch (from_type) |
bffbf940 JJ |
1250 | { |
1251 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1252 | case R_X86_64_GOTPC32_TLSDESC: |
1253 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1254 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1255 | if (bfd_link_executable (info)) |
142411ca L |
1256 | { |
1257 | if (h == NULL) | |
1258 | to_type = R_X86_64_TPOFF32; | |
1259 | else | |
1260 | to_type = R_X86_64_GOTTPOFF; | |
1261 | } | |
1262 | ||
bedfd056 L |
1263 | /* When we are called from elf_x86_64_relocate_section, there may |
1264 | be additional transitions based on TLS_TYPE. */ | |
1265 | if (from_relocate_section) | |
142411ca L |
1266 | { |
1267 | unsigned int new_to_type = to_type; | |
1268 | ||
51537393 | 1269 | if (TLS_TRANSITION_IE_TO_LE_P (info, h, tls_type)) |
142411ca L |
1270 | new_to_type = R_X86_64_TPOFF32; |
1271 | ||
1272 | if (to_type == R_X86_64_TLSGD | |
1273 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1274 | || to_type == R_X86_64_TLSDESC_CALL) | |
1275 | { | |
1276 | if (tls_type == GOT_TLS_IE) | |
1277 | new_to_type = R_X86_64_GOTTPOFF; | |
1278 | } | |
1279 | ||
1280 | /* We checked the transition before when we were called from | |
351f65ca | 1281 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1282 | transition which hasn't been checked before. */ |
1283 | check = new_to_type != to_type && from_type == to_type; | |
1284 | to_type = new_to_type; | |
1285 | } | |
1286 | ||
1287 | break; | |
1288 | ||
bffbf940 | 1289 | case R_X86_64_TLSLD: |
0e1862bb | 1290 | if (bfd_link_executable (info)) |
142411ca L |
1291 | to_type = R_X86_64_TPOFF32; |
1292 | break; | |
1293 | ||
1294 | default: | |
1295 | return TRUE; | |
bffbf940 JJ |
1296 | } |
1297 | ||
142411ca L |
1298 | /* Return TRUE if there is no transition. */ |
1299 | if (from_type == to_type) | |
1300 | return TRUE; | |
1301 | ||
1302 | /* Check if the transition can be performed. */ | |
1303 | if (check | |
351f65ca L |
1304 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1305 | symtab_hdr, sym_hashes, | |
1306 | from_type, rel, relend)) | |
142411ca | 1307 | { |
2f629d23 | 1308 | reloc_howto_type *from, *to; |
4c544807 | 1309 | const char *name; |
142411ca | 1310 | |
351f65ca L |
1311 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1312 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1313 | |
4c544807 L |
1314 | if (h) |
1315 | name = h->root.root.string; | |
1316 | else | |
1317 | { | |
0afcef53 | 1318 | struct elf_x86_link_hash_table *htab; |
4dfe6ac6 | 1319 | |
0afcef53 | 1320 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
1321 | if (htab == NULL) |
1322 | name = "*unknown*"; | |
1323 | else | |
1324 | { | |
1325 | Elf_Internal_Sym *isym; | |
1326 | ||
1327 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1328 | abfd, r_symndx); | |
1329 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1330 | } | |
4c544807 L |
1331 | } |
1332 | ||
4eca0228 | 1333 | _bfd_error_handler |
695344c0 | 1334 | /* xgettext:c-format */ |
d42c267e | 1335 | (_("%B: TLS transition from %s to %s against `%s' at %#Lx " |
142411ca | 1336 | "in section `%A' failed"), |
d42c267e | 1337 | abfd, from->name, to->name, name, rel->r_offset, sec); |
142411ca L |
1338 | bfd_set_error (bfd_error_bad_value); |
1339 | return FALSE; | |
1340 | } | |
1341 | ||
1342 | *r_type = to_type; | |
1343 | return TRUE; | |
bffbf940 JJ |
1344 | } |
1345 | ||
c1d11331 L |
1346 | /* Rename some of the generic section flags to better document how they |
1347 | are used here. */ | |
6999821f | 1348 | #define check_relocs_failed sec_flg0 |
338c190a L |
1349 | |
1350 | static bfd_boolean | |
aab921ad L |
1351 | elf_x86_64_need_pic (struct bfd_link_info *info, |
1352 | bfd *input_bfd, asection *sec, | |
338c190a L |
1353 | struct elf_link_hash_entry *h, |
1354 | Elf_Internal_Shdr *symtab_hdr, | |
1355 | Elf_Internal_Sym *isym, | |
1356 | reloc_howto_type *howto) | |
1357 | { | |
1358 | const char *v = ""; | |
1359 | const char *und = ""; | |
1360 | const char *pic = ""; | |
aab921ad | 1361 | const char *object; |
338c190a L |
1362 | |
1363 | const char *name; | |
1364 | if (h) | |
1365 | { | |
1366 | name = h->root.root.string; | |
1367 | switch (ELF_ST_VISIBILITY (h->other)) | |
1368 | { | |
1369 | case STV_HIDDEN: | |
1370 | v = _("hidden symbol "); | |
1371 | break; | |
1372 | case STV_INTERNAL: | |
1373 | v = _("internal symbol "); | |
1374 | break; | |
1375 | case STV_PROTECTED: | |
1376 | v = _("protected symbol "); | |
1377 | break; | |
1378 | default: | |
0afcef53 | 1379 | if (((struct elf_x86_link_hash_entry *) h)->def_protected) |
a5b4ee94 L |
1380 | v = _("protected symbol "); |
1381 | else | |
1382 | v = _("symbol "); | |
338c190a L |
1383 | pic = _("; recompile with -fPIC"); |
1384 | break; | |
1385 | } | |
1386 | ||
1387 | if (!h->def_regular && !h->def_dynamic) | |
1388 | und = _("undefined "); | |
1389 | } | |
1390 | else | |
1391 | { | |
1392 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL); | |
1393 | pic = _("; recompile with -fPIC"); | |
1394 | } | |
1395 | ||
aab921ad L |
1396 | if (bfd_link_dll (info)) |
1397 | object = _("a shared object"); | |
1398 | else if (bfd_link_pie (info)) | |
1399 | object = _("a PIE object"); | |
1400 | else | |
1401 | object = _("a PDE object"); | |
1402 | ||
695344c0 | 1403 | /* xgettext:c-format */ |
4eca0228 | 1404 | _bfd_error_handler (_("%B: relocation %s against %s%s`%s' can " |
aab921ad L |
1405 | "not be used when making %s%s"), |
1406 | input_bfd, howto->name, und, v, name, | |
1407 | object, pic); | |
338c190a L |
1408 | bfd_set_error (bfd_error_bad_value); |
1409 | sec->check_relocs_failed = 1; | |
1410 | return FALSE; | |
1411 | } | |
c1d11331 | 1412 | |
c175a657 L |
1413 | /* With the local symbol, foo, we convert |
1414 | mov foo@GOTPCREL(%rip), %reg | |
1415 | to | |
1416 | lea foo(%rip), %reg | |
1417 | and convert | |
1418 | call/jmp *foo@GOTPCREL(%rip) | |
1419 | to | |
1420 | nop call foo/jmp foo nop | |
1421 | When PIC is false, convert | |
1422 | test %reg, foo@GOTPCREL(%rip) | |
1423 | to | |
1424 | test $foo, %reg | |
1425 | and convert | |
1426 | binop foo@GOTPCREL(%rip), %reg | |
1427 | to | |
1428 | binop $foo, %reg | |
1429 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1430 | instructions. */ | |
1431 | ||
1432 | static bfd_boolean | |
8b43e456 | 1433 | elf_x86_64_convert_load_reloc (bfd *abfd, |
c175a657 | 1434 | bfd_byte *contents, |
6999821f | 1435 | unsigned int *r_type_p, |
c175a657 L |
1436 | Elf_Internal_Rela *irel, |
1437 | struct elf_link_hash_entry *h, | |
1438 | bfd_boolean *converted, | |
1439 | struct bfd_link_info *link_info) | |
1440 | { | |
0afcef53 | 1441 | struct elf_x86_link_hash_table *htab; |
c175a657 | 1442 | bfd_boolean is_pic; |
8b43e456 | 1443 | bfd_boolean no_overflow; |
c175a657 L |
1444 | bfd_boolean relocx; |
1445 | bfd_boolean to_reloc_pc32; | |
1446 | asection *tsec; | |
c175a657 L |
1447 | bfd_signed_vma raddend; |
1448 | unsigned int opcode; | |
1449 | unsigned int modrm; | |
6999821f | 1450 | unsigned int r_type = *r_type_p; |
c175a657 | 1451 | unsigned int r_symndx; |
c175a657 L |
1452 | bfd_vma roff = irel->r_offset; |
1453 | ||
1454 | if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2)) | |
1455 | return TRUE; | |
1456 | ||
1457 | raddend = irel->r_addend; | |
1458 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
1459 | if (raddend != -4) | |
1460 | return TRUE; | |
1461 | ||
0afcef53 | 1462 | htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA); |
c175a657 L |
1463 | is_pic = bfd_link_pic (link_info); |
1464 | ||
1465 | relocx = (r_type == R_X86_64_GOTPCRELX | |
1466 | || r_type == R_X86_64_REX_GOTPCRELX); | |
1467 | ||
8b43e456 L |
1468 | /* TRUE if --no-relax is used. */ |
1469 | no_overflow = link_info->disable_target_specific_optimizations > 1; | |
c175a657 L |
1470 | |
1471 | r_symndx = htab->r_sym (irel->r_info); | |
1472 | ||
1473 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1474 | ||
1475 | /* Convert mov to lea since it has been done for a while. */ | |
1476 | if (opcode != 0x8b) | |
1477 | { | |
1478 | /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX | |
1479 | for call, jmp or one of adc, add, and, cmp, or, sbb, sub, | |
1480 | test, xor instructions. */ | |
1481 | if (!relocx) | |
1482 | return TRUE; | |
1483 | } | |
1484 | ||
1485 | /* We convert only to R_X86_64_PC32: | |
1486 | 1. Branch. | |
1487 | 2. R_X86_64_GOTPCREL since we can't modify REX byte. | |
8b43e456 | 1488 | 3. no_overflow is true. |
c175a657 L |
1489 | 4. PIC. |
1490 | */ | |
1491 | to_reloc_pc32 = (opcode == 0xff | |
1492 | || !relocx | |
8b43e456 | 1493 | || no_overflow |
c175a657 L |
1494 | || is_pic); |
1495 | ||
1496 | /* Get the symbol referred to by the reloc. */ | |
1497 | if (h == NULL) | |
1498 | { | |
1499 | Elf_Internal_Sym *isym | |
1500 | = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx); | |
1501 | ||
1502 | /* Skip relocation against undefined symbols. */ | |
1503 | if (isym->st_shndx == SHN_UNDEF) | |
1504 | return TRUE; | |
1505 | ||
c175a657 L |
1506 | if (isym->st_shndx == SHN_ABS) |
1507 | tsec = bfd_abs_section_ptr; | |
1508 | else if (isym->st_shndx == SHN_COMMON) | |
1509 | tsec = bfd_com_section_ptr; | |
1510 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
1511 | tsec = &_bfd_elf_large_com_section; | |
1512 | else | |
1513 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c175a657 L |
1514 | } |
1515 | else | |
1516 | { | |
1517 | /* Undefined weak symbol is only bound locally in executable | |
1518 | and its reference is resolved as 0 without relocation | |
1519 | overflow. We can only perform this optimization for | |
1520 | GOTPCRELX relocations since we need to modify REX byte. | |
1521 | It is OK convert mov with R_X86_64_GOTPCREL to | |
1522 | R_X86_64_PC32. */ | |
0a27fed7 L |
1523 | bfd_boolean local_ref; |
1524 | struct elf_x86_link_hash_entry *eh = elf_x86_hash_entry (h); | |
1525 | ||
1526 | /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */ | |
1527 | local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h); | |
c175a657 | 1528 | if ((relocx || opcode == 0x8b) |
0a27fed7 L |
1529 | && (h->root.type == bfd_link_hash_undefweak |
1530 | && !eh->linker_def | |
1531 | && local_ref)) | |
c175a657 L |
1532 | { |
1533 | if (opcode == 0xff) | |
1534 | { | |
1535 | /* Skip for branch instructions since R_X86_64_PC32 | |
1536 | may overflow. */ | |
8b43e456 | 1537 | if (no_overflow) |
c175a657 L |
1538 | return TRUE; |
1539 | } | |
1540 | else if (relocx) | |
1541 | { | |
1542 | /* For non-branch instructions, we can convert to | |
1543 | R_X86_64_32/R_X86_64_32S since we know if there | |
1544 | is a REX byte. */ | |
1545 | to_reloc_pc32 = FALSE; | |
1546 | } | |
1547 | ||
1548 | /* Since we don't know the current PC when PIC is true, | |
1549 | we can't convert to R_X86_64_PC32. */ | |
1550 | if (to_reloc_pc32 && is_pic) | |
1551 | return TRUE; | |
1552 | ||
1553 | goto convert; | |
1554 | } | |
1555 | /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since | |
1556 | ld.so may use its link-time address. */ | |
cbd0eecf | 1557 | else if (h->start_stop |
0a27fed7 | 1558 | || eh->linker_def |
cbd0eecf L |
1559 | || ((h->def_regular |
1560 | || h->root.type == bfd_link_hash_defined | |
1561 | || h->root.type == bfd_link_hash_defweak) | |
1562 | && h != htab->elf.hdynamic | |
0a27fed7 | 1563 | && local_ref)) |
c175a657 L |
1564 | { |
1565 | /* bfd_link_hash_new or bfd_link_hash_undefined is | |
1566 | set by an assignment in a linker script in | |
cbd0eecf L |
1567 | bfd_elf_record_link_assignment. start_stop is set |
1568 | on __start_SECNAME/__stop_SECNAME which mark section | |
1569 | SECNAME. */ | |
1570 | if (h->start_stop | |
0a27fed7 | 1571 | || eh->linker_def |
cbd0eecf L |
1572 | || (h->def_regular |
1573 | && (h->root.type == bfd_link_hash_new | |
1574 | || h->root.type == bfd_link_hash_undefined | |
1575 | || ((h->root.type == bfd_link_hash_defined | |
1576 | || h->root.type == bfd_link_hash_defweak) | |
1577 | && h->root.u.def.section == bfd_und_section_ptr)))) | |
c175a657 L |
1578 | { |
1579 | /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */ | |
8b43e456 | 1580 | if (no_overflow) |
c175a657 L |
1581 | return TRUE; |
1582 | goto convert; | |
1583 | } | |
1584 | tsec = h->root.u.def.section; | |
c175a657 L |
1585 | } |
1586 | else | |
1587 | return TRUE; | |
1588 | } | |
1589 | ||
2168b268 L |
1590 | /* Don't convert GOTPCREL relocation against large section. */ |
1591 | if (elf_section_data (tsec) != NULL | |
1592 | && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0) | |
1593 | return TRUE; | |
1594 | ||
8b43e456 L |
1595 | /* Skip since R_X86_64_PC32/R_X86_64_32/R_X86_64_32S may overflow. */ |
1596 | if (no_overflow) | |
1597 | return TRUE; | |
c175a657 | 1598 | |
dc089072 | 1599 | convert: |
c175a657 L |
1600 | if (opcode == 0xff) |
1601 | { | |
1602 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
1603 | unsigned int nop; | |
1604 | unsigned int disp; | |
1605 | bfd_vma nop_offset; | |
1606 | ||
1607 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
1608 | R_X86_64_PC32. */ | |
1609 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1610 | if (modrm == 0x25) | |
1611 | { | |
1612 | /* Convert to "jmp foo nop". */ | |
1613 | modrm = 0xe9; | |
1614 | nop = NOP_OPCODE; | |
1615 | nop_offset = irel->r_offset + 3; | |
1616 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1617 | irel->r_offset -= 1; | |
1618 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1619 | } | |
1620 | else | |
1621 | { | |
0afcef53 L |
1622 | struct elf_x86_link_hash_entry *eh |
1623 | = (struct elf_x86_link_hash_entry *) h; | |
e2cbcd91 | 1624 | |
c175a657 L |
1625 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
1626 | is a nop prefix. */ | |
1627 | modrm = 0xe8; | |
e2cbcd91 L |
1628 | /* To support TLS optimization, always use addr32 prefix for |
1629 | "call *__tls_get_addr@GOTPCREL(%rip)". */ | |
1d4af308 | 1630 | if (eh && eh->tls_get_addr) |
c175a657 | 1631 | { |
e2cbcd91 L |
1632 | nop = 0x67; |
1633 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1634 | } |
1635 | else | |
e2cbcd91 L |
1636 | { |
1637 | nop = link_info->call_nop_byte; | |
1638 | if (link_info->call_nop_as_suffix) | |
1639 | { | |
1640 | nop_offset = irel->r_offset + 3; | |
1641 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1642 | irel->r_offset -= 1; | |
1643 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1644 | } | |
1645 | else | |
1646 | nop_offset = irel->r_offset - 2; | |
1647 | } | |
c175a657 L |
1648 | } |
1649 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1650 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1651 | r_type = R_X86_64_PC32; | |
1652 | } | |
1653 | else | |
1654 | { | |
1655 | unsigned int rex; | |
1656 | unsigned int rex_mask = REX_R; | |
1657 | ||
1658 | if (r_type == R_X86_64_REX_GOTPCRELX) | |
1659 | rex = bfd_get_8 (abfd, contents + roff - 3); | |
1660 | else | |
1661 | rex = 0; | |
1662 | ||
1663 | if (opcode == 0x8b) | |
1664 | { | |
1665 | if (to_reloc_pc32) | |
1666 | { | |
1667 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1668 | "lea foo(%rip), %reg". */ | |
1669 | opcode = 0x8d; | |
1670 | r_type = R_X86_64_PC32; | |
1671 | } | |
1672 | else | |
1673 | { | |
1674 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1675 | "mov $foo, %reg". */ | |
1676 | opcode = 0xc7; | |
1677 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1678 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1679 | if ((rex & REX_W) != 0 | |
1680 | && ABI_64_P (link_info->output_bfd)) | |
1681 | { | |
1682 | /* Keep the REX_W bit in REX byte for LP64. */ | |
1683 | r_type = R_X86_64_32S; | |
1684 | goto rewrite_modrm_rex; | |
1685 | } | |
1686 | else | |
1687 | { | |
1688 | /* If the REX_W bit in REX byte isn't needed, | |
1689 | use R_X86_64_32 and clear the W bit to avoid | |
1690 | sign-extend imm32 to imm64. */ | |
1691 | r_type = R_X86_64_32; | |
1692 | /* Clear the W bit in REX byte. */ | |
1693 | rex_mask |= REX_W; | |
1694 | goto rewrite_modrm_rex; | |
1695 | } | |
1696 | } | |
1697 | } | |
1698 | else | |
1699 | { | |
1700 | /* R_X86_64_PC32 isn't supported. */ | |
1701 | if (to_reloc_pc32) | |
1702 | return TRUE; | |
1703 | ||
1704 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1705 | if (opcode == 0x85) | |
1706 | { | |
1707 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
1708 | "test $foo, %reg". */ | |
1709 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1710 | opcode = 0xf7; | |
1711 | } | |
1712 | else | |
1713 | { | |
1714 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
1715 | "binop $foo, %reg". */ | |
1716 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
1717 | opcode = 0x81; | |
1718 | } | |
1719 | ||
1720 | /* Use R_X86_64_32 with 32-bit operand to avoid relocation | |
1721 | overflow when sign-extending imm32 to imm64. */ | |
1722 | r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32; | |
1723 | ||
1724 | rewrite_modrm_rex: | |
1725 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1726 | ||
1727 | if (rex) | |
1728 | { | |
1729 | /* Move the R bit to the B bit in REX byte. */ | |
1730 | rex = (rex & ~rex_mask) | (rex & REX_R) >> 2; | |
1731 | bfd_put_8 (abfd, rex, contents + roff - 3); | |
1732 | } | |
1733 | ||
1734 | /* No addend for R_X86_64_32/R_X86_64_32S relocations. */ | |
1735 | irel->r_addend = 0; | |
1736 | } | |
1737 | ||
1738 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1739 | } | |
1740 | ||
6999821f | 1741 | *r_type_p = r_type; |
78984959 L |
1742 | irel->r_info = htab->r_info (r_symndx, |
1743 | r_type | R_X86_64_converted_reloc_bit); | |
c175a657 L |
1744 | |
1745 | *converted = TRUE; | |
1746 | ||
1747 | return TRUE; | |
1748 | } | |
1749 | ||
70256ad8 | 1750 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1751 | calculate needed space in the global offset table, procedure |
1752 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1753 | |
b34976b6 | 1754 | static bfd_boolean |
351f65ca L |
1755 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1756 | asection *sec, | |
1757 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1758 | { |
0afcef53 | 1759 | struct elf_x86_link_hash_table *htab; |
70256ad8 AJ |
1760 | Elf_Internal_Shdr *symtab_hdr; |
1761 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1762 | const Elf_Internal_Rela *rel; |
1763 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 1764 | asection *sreloc; |
bedfd056 | 1765 | bfd_byte *contents; |
5e5e02ae | 1766 | bfd_boolean converted; |
70256ad8 | 1767 | |
0e1862bb | 1768 | if (bfd_link_relocatable (info)) |
b34976b6 | 1769 | return TRUE; |
70256ad8 | 1770 | |
081b1afe L |
1771 | /* Don't do anything special with non-loaded, non-alloced sections. |
1772 | In particular, any relocs in such sections should not affect GOT | |
1773 | and PLT reference counting (ie. we don't allow them to create GOT | |
1774 | or PLT entries), there's no possibility or desire to optimize TLS | |
1775 | relocs, and there's not much point in propagating relocs to shared | |
1776 | libs that the dynamic linker won't relocate. */ | |
1777 | if ((sec->flags & SEC_ALLOC) == 0) | |
1778 | return TRUE; | |
1779 | ||
0afcef53 | 1780 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 | 1781 | if (htab == NULL) |
afd9acee L |
1782 | { |
1783 | sec->check_relocs_failed = 1; | |
1784 | return FALSE; | |
1785 | } | |
4dfe6ac6 | 1786 | |
fe53b4a4 L |
1787 | BFD_ASSERT (is_x86_elf (abfd, htab)); |
1788 | ||
bedfd056 L |
1789 | /* Get the section contents. */ |
1790 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1791 | contents = elf_section_data (sec)->this_hdr.contents; | |
1792 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1793 | { | |
1794 | sec->check_relocs_failed = 1; | |
1795 | return FALSE; | |
1796 | } | |
1797 | ||
0ffa91dd | 1798 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1799 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1800 | |
5e5e02ae L |
1801 | converted = FALSE; |
1802 | ||
c434dee6 | 1803 | sreloc = NULL; |
cbe950e9 | 1804 | |
70256ad8 AJ |
1805 | rel_end = relocs + sec->reloc_count; |
1806 | for (rel = relocs; rel < rel_end; rel++) | |
1807 | { | |
bffbf940 | 1808 | unsigned int r_type; |
d42c267e | 1809 | unsigned int r_symndx; |
70256ad8 | 1810 | struct elf_link_hash_entry *h; |
0afcef53 | 1811 | struct elf_x86_link_hash_entry *eh; |
4c544807 L |
1812 | Elf_Internal_Sym *isym; |
1813 | const char *name; | |
06a6a421 | 1814 | bfd_boolean size_reloc; |
6999821f | 1815 | bfd_boolean converted_reloc; |
70256ad8 | 1816 | |
351f65ca L |
1817 | r_symndx = htab->r_sym (rel->r_info); |
1818 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1819 | |
1820 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1821 | { | |
695344c0 | 1822 | /* xgettext:c-format */ |
4eca0228 AM |
1823 | _bfd_error_handler (_("%B: bad symbol index: %d"), |
1824 | abfd, r_symndx); | |
afd9acee | 1825 | goto error_return; |
c434dee6 AJ |
1826 | } |
1827 | ||
70256ad8 | 1828 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1829 | { |
1830 | /* A local symbol. */ | |
c2e61a4e L |
1831 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1832 | abfd, r_symndx); | |
1833 | if (isym == NULL) | |
afd9acee | 1834 | goto error_return; |
c25bc9fc L |
1835 | |
1836 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1837 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1838 | { |
0afcef53 L |
1839 | h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, |
1840 | TRUE); | |
c25bc9fc | 1841 | if (h == NULL) |
afd9acee | 1842 | goto error_return; |
6bbec505 | 1843 | |
c25bc9fc | 1844 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
1845 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
1846 | isym, NULL); | |
c25bc9fc L |
1847 | h->type = STT_GNU_IFUNC; |
1848 | h->def_regular = 1; | |
1849 | h->ref_regular = 1; | |
1850 | h->forced_local = 1; | |
1851 | h->root.type = bfd_link_hash_defined; | |
1852 | } | |
1853 | else | |
1854 | h = NULL; | |
1855 | } | |
70256ad8 | 1856 | else |
71cb9464 | 1857 | { |
4c544807 | 1858 | isym = NULL; |
71cb9464 L |
1859 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1860 | while (h->root.type == bfd_link_hash_indirect | |
1861 | || h->root.type == bfd_link_hash_warning) | |
1862 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1863 | } |
cbe950e9 | 1864 | |
d1534d16 L |
1865 | /* Check invalid x32 relocations. */ |
1866 | if (!ABI_64_P (abfd)) | |
1867 | switch (r_type) | |
1868 | { | |
1869 | default: | |
1870 | break; | |
1871 | ||
d1534d16 L |
1872 | case R_X86_64_DTPOFF64: |
1873 | case R_X86_64_TPOFF64: | |
1874 | case R_X86_64_PC64: | |
1875 | case R_X86_64_GOTOFF64: | |
1876 | case R_X86_64_GOT64: | |
1877 | case R_X86_64_GOTPCREL64: | |
1878 | case R_X86_64_GOTPC64: | |
1879 | case R_X86_64_GOTPLT64: | |
1880 | case R_X86_64_PLTOFF64: | |
1881 | { | |
1882 | if (h) | |
1883 | name = h->root.root.string; | |
1884 | else | |
1885 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1886 | NULL); | |
4eca0228 | 1887 | _bfd_error_handler |
695344c0 | 1888 | /* xgettext:c-format */ |
d1534d16 L |
1889 | (_("%B: relocation %s against symbol `%s' isn't " |
1890 | "supported in x32 mode"), abfd, | |
1891 | x86_64_elf_howto_table[r_type].name, name); | |
1892 | bfd_set_error (bfd_error_bad_value); | |
afd9acee | 1893 | goto error_return; |
d1534d16 L |
1894 | } |
1895 | break; | |
1896 | } | |
1897 | ||
c25bc9fc L |
1898 | if (h != NULL) |
1899 | { | |
ad1e85de L |
1900 | /* It is referenced by a non-shared object. */ |
1901 | h->ref_regular = 1; | |
13a2df29 L |
1902 | |
1903 | if (h->type == STT_GNU_IFUNC) | |
1904 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
1905 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 1906 | } |
70256ad8 | 1907 | |
6999821f L |
1908 | converted_reloc = FALSE; |
1909 | if ((r_type == R_X86_64_GOTPCREL | |
1910 | || r_type == R_X86_64_GOTPCRELX | |
1911 | || r_type == R_X86_64_REX_GOTPCRELX) | |
1912 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
1913 | { | |
1914 | Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel; | |
1915 | if (!elf_x86_64_convert_load_reloc (abfd, contents, &r_type, | |
1916 | irel, h, &converted_reloc, | |
1917 | info)) | |
1918 | goto error_return; | |
5e5e02ae L |
1919 | |
1920 | if (converted_reloc) | |
1921 | converted = TRUE; | |
6999821f L |
1922 | } |
1923 | ||
bedfd056 | 1924 | if (! elf_x86_64_tls_transition (info, abfd, sec, contents, |
351f65ca L |
1925 | symtab_hdr, sym_hashes, |
1926 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 1927 | rel, rel_end, h, r_symndx, FALSE)) |
afd9acee | 1928 | goto error_return; |
142411ca | 1929 | |
0afcef53 | 1930 | eh = (struct elf_x86_link_hash_entry *) h; |
bffbf940 | 1931 | switch (r_type) |
70256ad8 | 1932 | { |
bffbf940 | 1933 | case R_X86_64_TLSLD: |
0f09b4d8 | 1934 | htab->tls_ld_or_ldm_got.refcount = 1; |
bffbf940 JJ |
1935 | goto create_got; |
1936 | ||
1937 | case R_X86_64_TPOFF32: | |
0e1862bb | 1938 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
aab921ad | 1939 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 1940 | &x86_64_elf_howto_table[r_type]); |
aec6b87e | 1941 | if (eh != NULL) |
98b273dc | 1942 | eh->zero_undefweak &= 0x2; |
bffbf940 | 1943 | break; |
c434dee6 | 1944 | |
bffbf940 | 1945 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1946 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
1947 | info->flags |= DF_STATIC_TLS; |
1948 | /* Fall through */ | |
70256ad8 | 1949 | |
bffbf940 JJ |
1950 | case R_X86_64_GOT32: |
1951 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
1952 | case R_X86_64_GOTPCRELX: |
1953 | case R_X86_64_REX_GOTPCRELX: | |
bffbf940 | 1954 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
1955 | case R_X86_64_GOT64: |
1956 | case R_X86_64_GOTPCREL64: | |
1957 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
1958 | case R_X86_64_GOTPC32_TLSDESC: |
1959 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
1960 | /* This symbol requires a global offset table entry. */ |
1961 | { | |
1962 | int tls_type, old_tls_type; | |
1963 | ||
1964 | switch (r_type) | |
1965 | { | |
1966 | default: tls_type = GOT_NORMAL; break; | |
1967 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
1968 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
1969 | case R_X86_64_GOTPC32_TLSDESC: |
1970 | case R_X86_64_TLSDESC_CALL: | |
1971 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
1972 | } |
1973 | ||
1974 | if (h != NULL) | |
1975 | { | |
0f09b4d8 | 1976 | h->got.refcount = 1; |
aec6b87e | 1977 | old_tls_type = eh->tls_type; |
bffbf940 JJ |
1978 | } |
1979 | else | |
1980 | { | |
1981 | bfd_signed_vma *local_got_refcounts; | |
1982 | ||
1983 | /* This is a global offset table entry for a local symbol. */ | |
1984 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1985 | if (local_got_refcounts == NULL) | |
1986 | { | |
1987 | bfd_size_type size; | |
1988 | ||
1989 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1990 | size *= sizeof (bfd_signed_vma) |
1991 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
1992 | local_got_refcounts = ((bfd_signed_vma *) |
1993 | bfd_zalloc (abfd, size)); | |
1994 | if (local_got_refcounts == NULL) | |
afd9acee | 1995 | goto error_return; |
bffbf940 | 1996 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
0afcef53 | 1997 | elf_x86_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 1998 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
0afcef53 | 1999 | elf_x86_local_got_tls_type (abfd) |
67a4f2b7 | 2000 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 | 2001 | } |
0f09b4d8 | 2002 | local_got_refcounts[r_symndx] = 1; |
bffbf940 | 2003 | old_tls_type |
0afcef53 | 2004 | = elf_x86_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
2005 | } |
2006 | ||
2007 | /* If a TLS symbol is accessed using IE at least once, | |
2008 | there is no point to use dynamic model for it. */ | |
2009 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
2010 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
2011 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 2012 | { |
67a4f2b7 | 2013 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 2014 | tls_type = old_tls_type; |
67a4f2b7 AO |
2015 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2016 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2017 | tls_type |= old_tls_type; | |
bffbf940 JJ |
2018 | else |
2019 | { | |
09a24cbf | 2020 | if (h) |
4c544807 L |
2021 | name = h->root.root.string; |
2022 | else | |
2023 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
2024 | isym, NULL); | |
4eca0228 | 2025 | _bfd_error_handler |
695344c0 | 2026 | /* xgettext:c-format */ |
63a5468a AM |
2027 | (_("%B: '%s' accessed both as normal and" |
2028 | " thread local symbol"), | |
4c544807 | 2029 | abfd, name); |
68c4a57e | 2030 | bfd_set_error (bfd_error_bad_value); |
afd9acee | 2031 | goto error_return; |
bffbf940 JJ |
2032 | } |
2033 | } | |
2034 | ||
2035 | if (old_tls_type != tls_type) | |
2036 | { | |
aec6b87e L |
2037 | if (eh != NULL) |
2038 | eh->tls_type = tls_type; | |
bffbf940 | 2039 | else |
0afcef53 | 2040 | elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
2041 | } |
2042 | } | |
c434dee6 AJ |
2043 | /* Fall through */ |
2044 | ||
d6ab8113 JB |
2045 | case R_X86_64_GOTOFF64: |
2046 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2047 | case R_X86_64_GOTPC64: |
bffbf940 | 2048 | create_got: |
aec6b87e | 2049 | if (eh != NULL) |
98b273dc | 2050 | eh->zero_undefweak &= 0x2; |
70256ad8 AJ |
2051 | break; |
2052 | ||
2053 | case R_X86_64_PLT32: | |
c3320543 | 2054 | case R_X86_64_PLT32_BND: |
70256ad8 | 2055 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
2056 | actually build the entry in adjust_dynamic_symbol, |
2057 | because this might be a case of linking PIC code which is | |
2058 | never referenced by a dynamic object, in which case we | |
2059 | don't need to generate a procedure linkage table entry | |
2060 | after all. */ | |
70256ad8 AJ |
2061 | |
2062 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 2063 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
2064 | if (h == NULL) |
2065 | continue; | |
2066 | ||
98b273dc | 2067 | eh->zero_undefweak &= 0x2; |
f5385ebf | 2068 | h->needs_plt = 1; |
79b0c981 | 2069 | h->plt.refcount = 1; |
70256ad8 AJ |
2070 | break; |
2071 | ||
7b81dfbb AJ |
2072 | case R_X86_64_PLTOFF64: |
2073 | /* This tries to form the 'address' of a function relative | |
2074 | to GOT. For global symbols we need a PLT entry. */ | |
2075 | if (h != NULL) | |
2076 | { | |
2077 | h->needs_plt = 1; | |
79b0c981 | 2078 | h->plt.refcount = 1; |
7b81dfbb AJ |
2079 | } |
2080 | goto create_got; | |
2081 | ||
6a3e1bae L |
2082 | case R_X86_64_SIZE32: |
2083 | case R_X86_64_SIZE64: | |
06a6a421 | 2084 | size_reloc = TRUE; |
6a3e1bae L |
2085 | goto do_size; |
2086 | ||
248775ba L |
2087 | case R_X86_64_32: |
2088 | if (!ABI_64_P (abfd)) | |
2089 | goto pointer; | |
1a0670f3 | 2090 | /* Fall through. */ |
cc78d0af AJ |
2091 | case R_X86_64_8: |
2092 | case R_X86_64_16: | |
70256ad8 | 2093 | case R_X86_64_32S: |
338c190a L |
2094 | /* Check relocation overflow as these relocs may lead to |
2095 | run-time relocation overflow. Don't error out for | |
1b71fb54 | 2096 | sections we don't care about, such as debug sections or |
338c190a | 2097 | when relocation overflow check is disabled. */ |
4c10bbaa | 2098 | if (!info->no_reloc_overflow_check |
6999821f | 2099 | && !converted_reloc |
338c190a L |
2100 | && (bfd_link_pic (info) |
2101 | || (bfd_link_executable (info) | |
2102 | && h != NULL | |
2103 | && !h->def_regular | |
2104 | && h->def_dynamic | |
081b1afe | 2105 | && (sec->flags & SEC_READONLY) == 0))) |
aab921ad | 2106 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2107 | &x86_64_elf_howto_table[r_type]); |
1b71fb54 AJ |
2108 | /* Fall through. */ |
2109 | ||
c434dee6 AJ |
2110 | case R_X86_64_PC8: |
2111 | case R_X86_64_PC16: | |
70256ad8 | 2112 | case R_X86_64_PC32: |
c3320543 | 2113 | case R_X86_64_PC32_BND: |
d6ab8113 | 2114 | case R_X86_64_PC64: |
1b71fb54 | 2115 | case R_X86_64_64: |
248775ba | 2116 | pointer: |
aec6b87e | 2117 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
98b273dc | 2118 | eh->zero_undefweak |= 0x2; |
bf52d7c7 L |
2119 | /* We are called after all symbols have been resolved. Only |
2120 | relocation against STT_GNU_IFUNC symbol must go through | |
2121 | PLT. */ | |
d1ed1c7d L |
2122 | if (h != NULL |
2123 | && (bfd_link_executable (info) | |
bf52d7c7 | 2124 | || h->type == STT_GNU_IFUNC)) |
c434dee6 | 2125 | { |
79b0c981 | 2126 | bfd_boolean func_pointer_ref = FALSE; |
233cc9c1 | 2127 | |
5db4f0d3 L |
2128 | if (r_type == R_X86_64_PC32) |
2129 | { | |
2130 | /* Since something like ".long foo - ." may be used | |
2131 | as pointer, make sure that PLT is used if foo is | |
2132 | a function defined in a shared library. */ | |
2133 | if ((sec->flags & SEC_CODE) == 0) | |
2134 | h->pointer_equality_needed = 1; | |
2135 | } | |
2136 | else if (r_type != R_X86_64_PC32_BND | |
2137 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
2138 | { |
2139 | h->pointer_equality_needed = 1; | |
2140 | /* At run-time, R_X86_64_64 can be resolved for both | |
2141 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
2142 | can only be resolved for x32. */ | |
2143 | if ((sec->flags & SEC_READONLY) == 0 | |
2144 | && (r_type == R_X86_64_64 | |
2145 | || (!ABI_64_P (abfd) | |
2146 | && (r_type == R_X86_64_32 | |
2147 | || r_type == R_X86_64_32S)))) | |
79b0c981 L |
2148 | func_pointer_ref = TRUE; |
2149 | } | |
2150 | ||
2151 | if (!func_pointer_ref) | |
2152 | { | |
2153 | /* If this reloc is in a read-only section, we might | |
2154 | need a copy reloc. We can't check reliably at this | |
2155 | stage whether the section is read-only, as input | |
2156 | sections have not yet been mapped to output sections. | |
2157 | Tentatively set the flag for now, and correct in | |
2158 | adjust_dynamic_symbol. */ | |
2159 | h->non_got_ref = 1; | |
2160 | ||
2161 | /* We may need a .plt entry if the symbol is a function | |
2162 | defined in a shared lib or is a function referenced | |
2163 | from the code or read-only section. */ | |
2164 | if (!h->def_regular | |
2165 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
2166 | h->plt.refcount = 1; | |
04ebc307 | 2167 | } |
c434dee6 | 2168 | } |
70256ad8 | 2169 | |
06a6a421 | 2170 | size_reloc = FALSE; |
6a3e1bae | 2171 | do_size: |
daf1c414 L |
2172 | if (NEED_DYNAMIC_RELOCATION_P (info, h, sec, r_type, |
2173 | htab->pointer_r_type)) | |
70256ad8 | 2174 | { |
e03a8ed8 L |
2175 | struct elf_dyn_relocs *p; |
2176 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2177 | |
2178 | /* We must copy these reloc types into the output file. | |
2179 | Create a reloc section in dynobj and make room for | |
2180 | this reloc. */ | |
70256ad8 AJ |
2181 | if (sreloc == NULL) |
2182 | { | |
83bac4b0 | 2183 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
2184 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
2185 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 2186 | |
70256ad8 | 2187 | if (sreloc == NULL) |
afd9acee | 2188 | goto error_return; |
70256ad8 AJ |
2189 | } |
2190 | ||
c434dee6 AJ |
2191 | /* If this is a global symbol, we count the number of |
2192 | relocations we need for this symbol. */ | |
2193 | if (h != NULL) | |
aec6b87e | 2194 | head = &eh->dyn_relocs; |
c434dee6 AJ |
2195 | else |
2196 | { | |
2197 | /* Track dynamic relocs needed for local syms too. | |
2198 | We really need local syms available to do this | |
2199 | easily. Oh well. */ | |
c434dee6 | 2200 | asection *s; |
87d72d41 | 2201 | void **vpp; |
87d72d41 AM |
2202 | |
2203 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2204 | abfd, r_symndx); | |
2205 | if (isym == NULL) | |
afd9acee | 2206 | goto error_return; |
87d72d41 AM |
2207 | |
2208 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2209 | if (s == NULL) |
87d72d41 | 2210 | s = sec; |
70256ad8 | 2211 | |
e81d3500 DD |
2212 | /* Beware of type punned pointers vs strict aliasing |
2213 | rules. */ | |
2214 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2215 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2216 | } |
70256ad8 | 2217 | |
c434dee6 AJ |
2218 | p = *head; |
2219 | if (p == NULL || p->sec != sec) | |
2220 | { | |
2221 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 2222 | |
e03a8ed8 | 2223 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2224 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2225 | if (p == NULL) |
afd9acee | 2226 | goto error_return; |
c434dee6 AJ |
2227 | p->next = *head; |
2228 | *head = p; | |
2229 | p->sec = sec; | |
2230 | p->count = 0; | |
2231 | p->pc_count = 0; | |
70256ad8 | 2232 | } |
c434dee6 AJ |
2233 | |
2234 | p->count += 1; | |
06a6a421 | 2235 | /* Count size relocation as PC-relative relocation. */ |
daf1c414 | 2236 | if (X86_PCREL_TYPE_P (r_type) || size_reloc) |
c434dee6 | 2237 | p->pc_count += 1; |
70256ad8 AJ |
2238 | } |
2239 | break; | |
fe4770f4 AJ |
2240 | |
2241 | /* This relocation describes the C++ object vtable hierarchy. | |
2242 | Reconstruct it for later use during GC. */ | |
2243 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2244 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
afd9acee | 2245 | goto error_return; |
fe4770f4 AJ |
2246 | break; |
2247 | ||
2248 | /* This relocation describes which C++ vtable entries are actually | |
2249 | used. Record for later use during GC. */ | |
2250 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
2251 | BFD_ASSERT (h != NULL); |
2252 | if (h != NULL | |
2253 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
afd9acee | 2254 | goto error_return; |
fe4770f4 | 2255 | break; |
c434dee6 AJ |
2256 | |
2257 | default: | |
2258 | break; | |
70256ad8 AJ |
2259 | } |
2260 | } | |
2261 | ||
bedfd056 L |
2262 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2263 | { | |
5e5e02ae | 2264 | if (!converted && !info->keep_memory) |
bedfd056 L |
2265 | free (contents); |
2266 | else | |
2267 | { | |
5e5e02ae L |
2268 | /* Cache the section contents for elf_link_input_bfd if any |
2269 | load is converted or --no-keep-memory isn't used. */ | |
bedfd056 L |
2270 | elf_section_data (sec)->this_hdr.contents = contents; |
2271 | } | |
2272 | } | |
2273 | ||
5e5e02ae L |
2274 | /* Cache relocations if any load is converted. */ |
2275 | if (elf_section_data (sec)->relocs != relocs && converted) | |
2276 | elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs; | |
2277 | ||
b34976b6 | 2278 | return TRUE; |
afd9acee L |
2279 | |
2280 | error_return: | |
bedfd056 L |
2281 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2282 | free (contents); | |
afd9acee L |
2283 | sec->check_relocs_failed = 1; |
2284 | return FALSE; | |
70256ad8 AJ |
2285 | } |
2286 | ||
bffbf940 JJ |
2287 | /* Return the relocation value for @tpoff relocation |
2288 | if STT_TLS virtual address is ADDRESS. */ | |
2289 | ||
2290 | static bfd_vma | |
351f65ca | 2291 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 2292 | { |
e1918d23 | 2293 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
2294 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
2295 | bfd_vma static_tls_size; | |
bffbf940 JJ |
2296 | |
2297 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 2298 | if (htab->tls_sec == NULL) |
bffbf940 | 2299 | return 0; |
7dc98aea RO |
2300 | |
2301 | /* Consider special static TLS alignment requirements. */ | |
2302 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
2303 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
2304 | } |
2305 | ||
90f487df L |
2306 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
2307 | branch? */ | |
2308 | ||
2309 | static bfd_boolean | |
2310 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
2311 | { | |
2312 | /* Opcode Instruction | |
2313 | 0xe8 call | |
2314 | 0xe9 jump | |
2315 | 0x0f 0x8x conditional jump */ | |
2316 | return ((offset > 0 | |
2317 | && (contents [offset - 1] == 0xe8 | |
2318 | || contents [offset - 1] == 0xe9)) | |
2319 | || (offset > 1 | |
2320 | && contents [offset - 2] == 0x0f | |
2321 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
2322 | } | |
2323 | ||
8d88c4ca NC |
2324 | /* Relocate an x86_64 ELF section. */ |
2325 | ||
b34976b6 | 2326 | static bfd_boolean |
351f65ca L |
2327 | elf_x86_64_relocate_section (bfd *output_bfd, |
2328 | struct bfd_link_info *info, | |
2329 | bfd *input_bfd, | |
2330 | asection *input_section, | |
2331 | bfd_byte *contents, | |
2332 | Elf_Internal_Rela *relocs, | |
2333 | Elf_Internal_Sym *local_syms, | |
2334 | asection **local_sections) | |
8d88c4ca | 2335 | { |
0afcef53 | 2336 | struct elf_x86_link_hash_table *htab; |
8d88c4ca NC |
2337 | Elf_Internal_Shdr *symtab_hdr; |
2338 | struct elf_link_hash_entry **sym_hashes; | |
2339 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2340 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 2341 | Elf_Internal_Rela *rel; |
60f2e42e | 2342 | Elf_Internal_Rela *wrel; |
8d88c4ca | 2343 | Elf_Internal_Rela *relend; |
38b12349 | 2344 | unsigned int plt_entry_size; |
8d88c4ca | 2345 | |
338c190a L |
2346 | /* Skip if check_relocs failed. */ |
2347 | if (input_section->check_relocs_failed) | |
2348 | return FALSE; | |
2349 | ||
0afcef53 | 2350 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
2351 | if (htab == NULL) |
2352 | return FALSE; | |
fe53b4a4 L |
2353 | |
2354 | BFD_ASSERT (is_x86_elf (input_bfd, htab)); | |
2355 | ||
765e526c | 2356 | plt_entry_size = htab->plt.plt_entry_size; |
0ffa91dd | 2357 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
2358 | sym_hashes = elf_sym_hashes (input_bfd); |
2359 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
0afcef53 | 2360 | local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 2361 | |
0afcef53 | 2362 | _bfd_x86_elf_set_tls_module_base (info); |
9f03412a | 2363 | |
60f2e42e | 2364 | rel = wrel = relocs; |
8d88c4ca | 2365 | relend = relocs + input_section->reloc_count; |
60f2e42e | 2366 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 2367 | { |
419414ea | 2368 | unsigned int r_type, r_type_tls; |
8d88c4ca NC |
2369 | reloc_howto_type *howto; |
2370 | unsigned long r_symndx; | |
2371 | struct elf_link_hash_entry *h; | |
0afcef53 | 2372 | struct elf_x86_link_hash_entry *eh; |
8d88c4ca NC |
2373 | Elf_Internal_Sym *sym; |
2374 | asection *sec; | |
0ff2b86e | 2375 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 2376 | bfd_vma relocation; |
b34976b6 | 2377 | bfd_boolean unresolved_reloc; |
8d88c4ca | 2378 | bfd_reloc_status_type r; |
bffbf940 | 2379 | int tls_type; |
0ff2b86e | 2380 | asection *base_got, *resolved_plt; |
1788fc08 | 2381 | bfd_vma st_size; |
aec6b87e | 2382 | bfd_boolean resolved_to_zero; |
9e9821dd | 2383 | bfd_boolean relative_reloc; |
78984959 | 2384 | bfd_boolean converted_reloc; |
aebcc8ff | 2385 | bfd_boolean need_copy_reloc_in_pie; |
8d88c4ca | 2386 | |
351f65ca | 2387 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
2388 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
2389 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
2390 | { |
2391 | if (wrel != rel) | |
2392 | *wrel = *rel; | |
2393 | continue; | |
2394 | } | |
8d88c4ca | 2395 | |
78984959 L |
2396 | converted_reloc = (r_type & R_X86_64_converted_reloc_bit) != 0; |
2397 | r_type &= ~R_X86_64_converted_reloc_bit; | |
2398 | ||
9911c0fc | 2399 | if (r_type >= (int) R_X86_64_standard) |
47aeb64c | 2400 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
8d88c4ca | 2401 | |
d7921315 | 2402 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 2403 | || ABI_64_P (output_bfd)) |
d7921315 L |
2404 | howto = x86_64_elf_howto_table + r_type; |
2405 | else | |
2406 | howto = (x86_64_elf_howto_table | |
2407 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 2408 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
2409 | h = NULL; |
2410 | sym = NULL; | |
2411 | sec = NULL; | |
b34976b6 | 2412 | unresolved_reloc = FALSE; |
8d88c4ca | 2413 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
2414 | { |
2415 | sym = local_syms + r_symndx; | |
2416 | sec = local_sections[r_symndx]; | |
c434dee6 | 2417 | |
c25bc9fc L |
2418 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
2419 | &sec, rel); | |
1788fc08 | 2420 | st_size = sym->st_size; |
c25bc9fc L |
2421 | |
2422 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 2423 | if (!bfd_link_relocatable (info) |
351f65ca | 2424 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 2425 | { |
0afcef53 L |
2426 | h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, |
2427 | rel, FALSE); | |
c25bc9fc L |
2428 | if (h == NULL) |
2429 | abort (); | |
2430 | ||
eed180f8 | 2431 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
2432 | h->root.u.def.value = sym->st_value; |
2433 | h->root.u.def.section = sec; | |
2434 | } | |
8da6118f | 2435 | } |
8d88c4ca | 2436 | else |
8da6118f | 2437 | { |
c9736ba0 | 2438 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 2439 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
c434dee6 | 2440 | |
b2a8e766 AM |
2441 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2442 | r_symndx, symtab_hdr, sym_hashes, | |
2443 | h, sec, relocation, | |
62d887d4 | 2444 | unresolved_reloc, warned, ignored); |
1788fc08 | 2445 | st_size = h->size; |
8da6118f | 2446 | } |
ab96bf03 | 2447 | |
dbaa2011 | 2448 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
2449 | { |
2450 | _bfd_clear_contents (howto, input_bfd, input_section, | |
2451 | contents + rel->r_offset); | |
2452 | wrel->r_offset = rel->r_offset; | |
2453 | wrel->r_info = 0; | |
2454 | wrel->r_addend = 0; | |
2455 | ||
2456 | /* For ld -r, remove relocations in debug sections against | |
2457 | sections defined in discarded sections. Not done for | |
2458 | eh_frame editing code expects to be present. */ | |
2459 | if (bfd_link_relocatable (info) | |
2460 | && (input_section->flags & SEC_DEBUGGING)) | |
2461 | wrel--; | |
2462 | ||
2463 | continue; | |
2464 | } | |
ab96bf03 | 2465 | |
0e1862bb | 2466 | if (bfd_link_relocatable (info)) |
2d5da473 L |
2467 | { |
2468 | if (wrel != rel) | |
2469 | *wrel = *rel; | |
2470 | continue; | |
2471 | } | |
ab96bf03 | 2472 | |
1788fc08 | 2473 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 2474 | { |
1788fc08 L |
2475 | if (r_type == R_X86_64_64) |
2476 | { | |
2477 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
2478 | zero-extend it to 64bit if addend is zero. */ | |
2479 | r_type = R_X86_64_32; | |
2480 | memset (contents + rel->r_offset + 4, 0, 4); | |
2481 | } | |
2482 | else if (r_type == R_X86_64_SIZE64) | |
2483 | { | |
2484 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
2485 | zero-extend it to 64bit if addend is zero. */ | |
2486 | r_type = R_X86_64_SIZE32; | |
2487 | memset (contents + rel->r_offset + 4, 0, 4); | |
2488 | } | |
64d25c44 L |
2489 | } |
2490 | ||
0afcef53 | 2491 | eh = (struct elf_x86_link_hash_entry *) h; |
0ff2b86e | 2492 | |
cbe950e9 L |
2493 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
2494 | it here if it is defined in a non-shared object. */ | |
2495 | if (h != NULL | |
2496 | && h->type == STT_GNU_IFUNC | |
2497 | && h->def_regular) | |
2498 | { | |
cbe950e9 | 2499 | bfd_vma plt_index; |
4c544807 | 2500 | const char *name; |
cbe950e9 | 2501 | |
97dc35c8 L |
2502 | if ((input_section->flags & SEC_ALLOC) == 0) |
2503 | { | |
2504 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
2505 | sections because such sections are not SEC_ALLOC and | |
2506 | thus ld.so will not process them. */ | |
2507 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 2508 | continue; |
97dc35c8 L |
2509 | abort (); |
2510 | } | |
233cc9c1 L |
2511 | |
2512 | switch (r_type) | |
2513 | { | |
2514 | default: | |
2515 | break; | |
2516 | ||
2517 | case R_X86_64_GOTPCREL: | |
2518 | case R_X86_64_GOTPCRELX: | |
2519 | case R_X86_64_REX_GOTPCRELX: | |
2520 | case R_X86_64_GOTPCREL64: | |
2521 | base_got = htab->elf.sgot; | |
2522 | off = h->got.offset; | |
2523 | ||
2524 | if (base_got == NULL) | |
2525 | abort (); | |
2526 | ||
2527 | if (off == (bfd_vma) -1) | |
2528 | { | |
2529 | /* We can't use h->got.offset here to save state, or | |
2530 | even just remember the offset, as finish_dynamic_symbol | |
2531 | would use that as offset into .got. */ | |
2532 | ||
2533 | if (h->plt.offset == (bfd_vma) -1) | |
2534 | abort (); | |
2535 | ||
2536 | if (htab->elf.splt != NULL) | |
2537 | { | |
38b12349 | 2538 | plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2539 | - htab->plt.has_plt0); |
233cc9c1 L |
2540 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
2541 | base_got = htab->elf.sgotplt; | |
2542 | } | |
2543 | else | |
2544 | { | |
2545 | plt_index = h->plt.offset / plt_entry_size; | |
2546 | off = plt_index * GOT_ENTRY_SIZE; | |
2547 | base_got = htab->elf.igotplt; | |
2548 | } | |
2549 | ||
2550 | if (h->dynindx == -1 | |
2551 | || h->forced_local | |
2552 | || info->symbolic) | |
2553 | { | |
2554 | /* This references the local defitionion. We must | |
2555 | initialize this entry in the global offset table. | |
2556 | Since the offset must always be a multiple of 8, | |
2557 | we use the least significant bit to record | |
2558 | whether we have initialized it already. | |
2559 | ||
2560 | When doing a dynamic link, we create a .rela.got | |
2561 | relocation entry to initialize the value. This | |
2562 | is done in the finish_dynamic_symbol routine. */ | |
2563 | if ((off & 1) != 0) | |
2564 | off &= ~1; | |
2565 | else | |
2566 | { | |
2567 | bfd_put_64 (output_bfd, relocation, | |
2568 | base_got->contents + off); | |
2569 | /* Note that this is harmless for the GOTPLT64 | |
2570 | case, as -1 | 1 still is -1. */ | |
2571 | h->got.offset |= 1; | |
2572 | } | |
2573 | } | |
2574 | } | |
2575 | ||
2576 | relocation = (base_got->output_section->vma | |
2577 | + base_got->output_offset + off); | |
2578 | ||
2579 | goto do_relocation; | |
2580 | } | |
2581 | ||
2582 | if (h->plt.offset == (bfd_vma) -1) | |
2583 | { | |
2584 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
2585 | if (r_type == htab->pointer_r_type | |
2586 | && (input_section->flags & SEC_CODE) == 0) | |
2587 | goto do_ifunc_pointer; | |
2588 | goto bad_ifunc_reloc; | |
2589 | } | |
cbe950e9 L |
2590 | |
2591 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
2592 | if (htab->elf.splt != NULL) |
2593 | { | |
f2c29a16 | 2594 | if (htab->plt_second != NULL) |
0ff2b86e | 2595 | { |
f2c29a16 L |
2596 | resolved_plt = htab->plt_second; |
2597 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
2598 | } |
2599 | else | |
2600 | { | |
2601 | resolved_plt = htab->elf.splt; | |
2602 | plt_offset = h->plt.offset; | |
2603 | } | |
2604 | } | |
2605 | else | |
2606 | { | |
2607 | resolved_plt = htab->elf.iplt; | |
2608 | plt_offset = h->plt.offset; | |
2609 | } | |
2610 | ||
2611 | relocation = (resolved_plt->output_section->vma | |
2612 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
2613 | |
2614 | switch (r_type) | |
2615 | { | |
2616 | default: | |
233cc9c1 | 2617 | bad_ifunc_reloc: |
4c544807 L |
2618 | if (h->root.root.string) |
2619 | name = h->root.root.string; | |
2620 | else | |
2621 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
2622 | NULL); | |
4eca0228 | 2623 | _bfd_error_handler |
695344c0 | 2624 | /* xgettext:c-format */ |
cbe950e9 | 2625 | (_("%B: relocation %s against STT_GNU_IFUNC " |
233cc9c1 L |
2626 | "symbol `%s' isn't supported"), input_bfd, |
2627 | howto->name, name); | |
cbe950e9 L |
2628 | bfd_set_error (bfd_error_bad_value); |
2629 | return FALSE; | |
2630 | ||
2631 | case R_X86_64_32S: | |
0e1862bb | 2632 | if (bfd_link_pic (info)) |
cbe950e9 | 2633 | abort (); |
710ab287 L |
2634 | goto do_relocation; |
2635 | ||
248775ba L |
2636 | case R_X86_64_32: |
2637 | if (ABI_64_P (output_bfd)) | |
2638 | goto do_relocation; | |
17672001 | 2639 | /* FALLTHROUGH */ |
eed180f8 | 2640 | case R_X86_64_64: |
233cc9c1 | 2641 | do_ifunc_pointer: |
710ab287 L |
2642 | if (rel->r_addend != 0) |
2643 | { | |
4c544807 L |
2644 | if (h->root.root.string) |
2645 | name = h->root.root.string; | |
2646 | else | |
2647 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
2648 | sym, NULL); | |
4eca0228 | 2649 | _bfd_error_handler |
695344c0 | 2650 | /* xgettext:c-format */ |
710ab287 | 2651 | (_("%B: relocation %s against STT_GNU_IFUNC " |
d42c267e | 2652 | "symbol `%s' has non-zero addend: %Ld"), |
ef77d6af | 2653 | input_bfd, howto->name, name, rel->r_addend); |
710ab287 L |
2654 | bfd_set_error (bfd_error_bad_value); |
2655 | return FALSE; | |
2656 | } | |
2657 | ||
2658 | /* Generate dynamic relcoation only when there is a | |
233cc9c1 L |
2659 | non-GOT reference in a shared object or there is no |
2660 | PLT. */ | |
2661 | if ((bfd_link_pic (info) && h->non_got_ref) | |
2662 | || h->plt.offset == (bfd_vma) -1) | |
710ab287 L |
2663 | { |
2664 | Elf_Internal_Rela outrel; | |
710ab287 L |
2665 | asection *sreloc; |
2666 | ||
c25bc9fc L |
2667 | /* Need a dynamic relocation to get the real function |
2668 | address. */ | |
710ab287 L |
2669 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
2670 | info, | |
2671 | input_section, | |
2672 | rel->r_offset); | |
2673 | if (outrel.r_offset == (bfd_vma) -1 | |
2674 | || outrel.r_offset == (bfd_vma) -2) | |
2675 | abort (); | |
2676 | ||
2677 | outrel.r_offset += (input_section->output_section->vma | |
2678 | + input_section->output_offset); | |
2679 | ||
cf1070f1 | 2680 | if (POINTER_LOCAL_IFUNC_P (info, h)) |
710ab287 | 2681 | { |
6322e5c5 L |
2682 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
2683 | h->root.root.string, | |
2684 | h->root.u.def.section->owner); | |
2685 | ||
710ab287 | 2686 | /* This symbol is resolved locally. */ |
56b8aada L |
2687 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
2688 | outrel.r_addend = (h->root.u.def.value | |
2689 | + h->root.u.def.section->output_section->vma | |
2690 | + h->root.u.def.section->output_offset); | |
710ab287 L |
2691 | } |
2692 | else | |
2693 | { | |
351f65ca | 2694 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
2695 | outrel.r_addend = 0; |
2696 | } | |
2697 | ||
233cc9c1 L |
2698 | /* Dynamic relocations are stored in |
2699 | 1. .rela.ifunc section in PIC object. | |
2700 | 2. .rela.got section in dynamic executable. | |
2701 | 3. .rela.iplt section in static executable. */ | |
2702 | if (bfd_link_pic (info)) | |
2703 | sreloc = htab->elf.irelifunc; | |
2704 | else if (htab->elf.splt != NULL) | |
2705 | sreloc = htab->elf.srelgot; | |
2706 | else | |
2707 | sreloc = htab->elf.irelplt; | |
351f65ca | 2708 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
2709 | |
2710 | /* If this reloc is against an external symbol, we | |
2711 | do not want to fiddle with the addend. Otherwise, | |
2712 | we need to include the symbol value so that it | |
2713 | becomes an addend for the dynamic reloc. For an | |
2714 | internal symbol, we have updated addend. */ | |
56b8aada | 2715 | continue; |
710ab287 | 2716 | } |
17672001 | 2717 | /* FALLTHROUGH */ |
cbe950e9 | 2718 | case R_X86_64_PC32: |
c3320543 | 2719 | case R_X86_64_PC32_BND: |
cbe950e9 L |
2720 | case R_X86_64_PC64: |
2721 | case R_X86_64_PLT32: | |
c3320543 | 2722 | case R_X86_64_PLT32_BND: |
cbe950e9 | 2723 | goto do_relocation; |
cbe950e9 L |
2724 | } |
2725 | } | |
2726 | ||
aec6b87e | 2727 | resolved_to_zero = (eh != NULL |
c5bce5c6 | 2728 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh)); |
aec6b87e | 2729 | |
70256ad8 AJ |
2730 | /* When generating a shared object, the relocations handled here are |
2731 | copied into the output file to be resolved at run time. */ | |
2732 | switch (r_type) | |
2733 | { | |
2734 | case R_X86_64_GOT32: | |
7b81dfbb | 2735 | case R_X86_64_GOT64: |
70256ad8 AJ |
2736 | /* Relocation is to the entry for this symbol in the global |
2737 | offset table. */ | |
70256ad8 | 2738 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
2739 | case R_X86_64_GOTPCRELX: |
2740 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
2741 | case R_X86_64_GOTPCREL64: |
2742 | /* Use global offset table entry as symbol value. */ | |
2743 | case R_X86_64_GOTPLT64: | |
de194d85 | 2744 | /* This is obsolete and treated the same as GOT64. */ |
6de2ae4a | 2745 | base_got = htab->elf.sgot; |
7b81dfbb | 2746 | |
6de2ae4a | 2747 | if (htab->elf.sgot == NULL) |
c434dee6 | 2748 | abort (); |
053579d7 | 2749 | |
9e9821dd | 2750 | relative_reloc = FALSE; |
51e0a107 | 2751 | if (h != NULL) |
70256ad8 | 2752 | { |
c434dee6 | 2753 | off = h->got.offset; |
7b81dfbb | 2754 | if (h->needs_plt |
eed180f8 | 2755 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
2756 | && off == (bfd_vma)-1) |
2757 | { | |
2758 | /* We can't use h->got.offset here to save | |
2759 | state, or even just remember the offset, as | |
2760 | finish_dynamic_symbol would use that as offset into | |
2761 | .got. */ | |
38b12349 | 2762 | bfd_vma plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2763 | - htab->plt.has_plt0); |
7b81dfbb | 2764 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 2765 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
2766 | } |
2767 | ||
2eba97c2 | 2768 | if (RESOLVED_LOCALLY_P (info, h, htab)) |
51e0a107 | 2769 | { |
2eba97c2 L |
2770 | /* We must initialize this entry in the global offset |
2771 | table. Since the offset must always be a multiple | |
2772 | of 8, we use the least significant bit to record | |
2773 | whether we have initialized it already. | |
51e0a107 JH |
2774 | |
2775 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
2776 | relocation entry to initialize the value. This is |
2777 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
2778 | if ((off & 1) != 0) |
2779 | off &= ~1; | |
2780 | else | |
2781 | { | |
2782 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
2783 | base_got->contents + off); |
2784 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 2785 | as -1 | 1 still is -1. */ |
51e0a107 | 2786 | h->got.offset |= 1; |
9e9821dd | 2787 | |
f70656b2 | 2788 | if (GENERATE_RELATIVE_RELOC_P (info, h)) |
9e9821dd L |
2789 | { |
2790 | /* If this symbol isn't dynamic in PIC, | |
2791 | generate R_X86_64_RELATIVE here. */ | |
2792 | eh->no_finish_dynamic_symbol = 1; | |
2793 | relative_reloc = TRUE; | |
2794 | } | |
51e0a107 JH |
2795 | } |
2796 | } | |
053579d7 | 2797 | else |
b34976b6 | 2798 | unresolved_reloc = FALSE; |
70256ad8 | 2799 | } |
51e0a107 JH |
2800 | else |
2801 | { | |
c434dee6 AJ |
2802 | if (local_got_offsets == NULL) |
2803 | abort (); | |
51e0a107 JH |
2804 | |
2805 | off = local_got_offsets[r_symndx]; | |
2806 | ||
2807 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
2808 | the least significant bit to record whether we have |
2809 | already generated the necessary reloc. */ | |
51e0a107 JH |
2810 | if ((off & 1) != 0) |
2811 | off &= ~1; | |
2812 | else | |
2813 | { | |
c434dee6 | 2814 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 2815 | base_got->contents + off); |
9e9821dd | 2816 | local_got_offsets[r_symndx] |= 1; |
51e0a107 | 2817 | |
0e1862bb | 2818 | if (bfd_link_pic (info)) |
9e9821dd | 2819 | relative_reloc = TRUE; |
51e0a107 | 2820 | } |
51e0a107 | 2821 | } |
6a2bda3f | 2822 | |
9e9821dd L |
2823 | if (relative_reloc) |
2824 | { | |
2825 | asection *s; | |
2826 | Elf_Internal_Rela outrel; | |
2827 | ||
2828 | /* We need to generate a R_X86_64_RELATIVE reloc | |
2829 | for the dynamic linker. */ | |
2830 | s = htab->elf.srelgot; | |
2831 | if (s == NULL) | |
2832 | abort (); | |
2833 | ||
2834 | outrel.r_offset = (base_got->output_section->vma | |
2835 | + base_got->output_offset | |
2836 | + off); | |
2837 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); | |
2838 | outrel.r_addend = relocation; | |
2839 | elf_append_rela (output_bfd, s, &outrel); | |
2840 | } | |
2841 | ||
c434dee6 AJ |
2842 | if (off >= (bfd_vma) -2) |
2843 | abort (); | |
2844 | ||
7b81dfbb AJ |
2845 | relocation = base_got->output_section->vma |
2846 | + base_got->output_offset + off; | |
56ceb5b5 L |
2847 | if (r_type != R_X86_64_GOTPCREL |
2848 | && r_type != R_X86_64_GOTPCRELX | |
2849 | && r_type != R_X86_64_REX_GOTPCRELX | |
2850 | && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
2851 | relocation -= htab->elf.sgotplt->output_section->vma |
2852 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 2853 | |
70256ad8 AJ |
2854 | break; |
2855 | ||
d6ab8113 JB |
2856 | case R_X86_64_GOTOFF64: |
2857 | /* Relocation is relative to the start of the global offset | |
2858 | table. */ | |
2859 | ||
3d949995 L |
2860 | /* Check to make sure it isn't a protected function or data |
2861 | symbol for shared library since it may not be local when | |
e3c0e327 L |
2862 | used as function address or with copy relocation. We also |
2863 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 2864 | if (bfd_link_pic (info) && h) |
d6ab8113 | 2865 | { |
e3c0e327 L |
2866 | if (!h->def_regular) |
2867 | { | |
2868 | const char *v; | |
2869 | ||
2870 | switch (ELF_ST_VISIBILITY (h->other)) | |
2871 | { | |
2872 | case STV_HIDDEN: | |
2873 | v = _("hidden symbol"); | |
2874 | break; | |
2875 | case STV_INTERNAL: | |
2876 | v = _("internal symbol"); | |
2877 | break; | |
2878 | case STV_PROTECTED: | |
2879 | v = _("protected symbol"); | |
2880 | break; | |
2881 | default: | |
2882 | v = _("symbol"); | |
2883 | break; | |
2884 | } | |
2885 | ||
4eca0228 | 2886 | _bfd_error_handler |
695344c0 | 2887 | /* xgettext:c-format */ |
63a5468a AM |
2888 | (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s" |
2889 | " `%s' can not be used when making a shared object"), | |
e3c0e327 L |
2890 | input_bfd, v, h->root.root.string); |
2891 | bfd_set_error (bfd_error_bad_value); | |
2892 | return FALSE; | |
2893 | } | |
0e1862bb | 2894 | else if (!bfd_link_executable (info) |
6999821f | 2895 | && !SYMBOL_REFERENCES_LOCAL_P (info, h) |
e3c0e327 L |
2896 | && (h->type == STT_FUNC |
2897 | || h->type == STT_OBJECT) | |
2898 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
2899 | { | |
4eca0228 | 2900 | _bfd_error_handler |
695344c0 | 2901 | /* xgettext:c-format */ |
63a5468a AM |
2902 | (_("%B: relocation R_X86_64_GOTOFF64 against protected %s" |
2903 | " `%s' can not be used when making a shared object"), | |
e3c0e327 L |
2904 | input_bfd, |
2905 | h->type == STT_FUNC ? "function" : "data", | |
2906 | h->root.root.string); | |
2907 | bfd_set_error (bfd_error_bad_value); | |
d6ab8113 | 2908 | return FALSE; |
e3c0e327 | 2909 | } |
d6ab8113 JB |
2910 | } |
2911 | ||
2912 | /* Note that sgot is not involved in this | |
2913 | calculation. We always want the start of .got.plt. If we | |
2914 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
2915 | permitted by the ABI, we might have to change this | |
2916 | calculation. */ | |
6de2ae4a L |
2917 | relocation -= htab->elf.sgotplt->output_section->vma |
2918 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
2919 | break; |
2920 | ||
2921 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2922 | case R_X86_64_GOTPC64: |
d6ab8113 | 2923 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
2924 | relocation = htab->elf.sgotplt->output_section->vma |
2925 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
2926 | unresolved_reloc = FALSE; |
2927 | break; | |
7b81dfbb AJ |
2928 | |
2929 | case R_X86_64_PLTOFF64: | |
2930 | /* Relocation is PLT entry relative to GOT. For local | |
2931 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 2932 | if (h != NULL |
7b81dfbb | 2933 | /* See PLT32 handling. */ |
9d734efa L |
2934 | && (h->plt.offset != (bfd_vma) -1 |
2935 | || eh->plt_got.offset != (bfd_vma) -1) | |
6de2ae4a | 2936 | && htab->elf.splt != NULL) |
7b81dfbb | 2937 | { |
9d734efa L |
2938 | if (eh->plt_got.offset != (bfd_vma) -1) |
2939 | { | |
2940 | /* Use the GOT PLT. */ | |
2941 | resolved_plt = htab->plt_got; | |
2942 | plt_offset = eh->plt_got.offset; | |
2943 | } | |
f2c29a16 | 2944 | else if (htab->plt_second != NULL) |
0ff2b86e | 2945 | { |
f2c29a16 L |
2946 | resolved_plt = htab->plt_second; |
2947 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
2948 | } |
2949 | else | |
2950 | { | |
2951 | resolved_plt = htab->elf.splt; | |
2952 | plt_offset = h->plt.offset; | |
2953 | } | |
2954 | ||
2955 | relocation = (resolved_plt->output_section->vma | |
2956 | + resolved_plt->output_offset | |
2957 | + plt_offset); | |
7b81dfbb AJ |
2958 | unresolved_reloc = FALSE; |
2959 | } | |
2960 | ||
6de2ae4a L |
2961 | relocation -= htab->elf.sgotplt->output_section->vma |
2962 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 2963 | break; |
d6ab8113 | 2964 | |
70256ad8 | 2965 | case R_X86_64_PLT32: |
c3320543 | 2966 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
2967 | /* Relocation is to the entry for this symbol in the |
2968 | procedure linkage table. */ | |
2969 | ||
2970 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 2971 | without using the procedure linkage table. */ |
70256ad8 AJ |
2972 | if (h == NULL) |
2973 | break; | |
2974 | ||
dd7e64d4 L |
2975 | if ((h->plt.offset == (bfd_vma) -1 |
2976 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 2977 | || htab->elf.splt == NULL) |
70256ad8 AJ |
2978 | { |
2979 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
2980 | happens when statically linking PIC code, or when |
2981 | using -Bsymbolic. */ | |
70256ad8 AJ |
2982 | break; |
2983 | } | |
2984 | ||
dd7e64d4 | 2985 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 2986 | { |
f2c29a16 | 2987 | if (htab->plt_second != NULL) |
dd7e64d4 | 2988 | { |
f2c29a16 L |
2989 | resolved_plt = htab->plt_second; |
2990 | plt_offset = eh->plt_second.offset; | |
dd7e64d4 L |
2991 | } |
2992 | else | |
2993 | { | |
2994 | resolved_plt = htab->elf.splt; | |
2995 | plt_offset = h->plt.offset; | |
2996 | } | |
0ff2b86e L |
2997 | } |
2998 | else | |
2999 | { | |
dd7e64d4 L |
3000 | /* Use the GOT PLT. */ |
3001 | resolved_plt = htab->plt_got; | |
3002 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
3003 | } |
3004 | ||
3005 | relocation = (resolved_plt->output_section->vma | |
3006 | + resolved_plt->output_offset | |
3007 | + plt_offset); | |
b34976b6 | 3008 | unresolved_reloc = FALSE; |
70256ad8 AJ |
3009 | break; |
3010 | ||
1788fc08 L |
3011 | case R_X86_64_SIZE32: |
3012 | case R_X86_64_SIZE64: | |
1788fc08 L |
3013 | /* Set to symbol size. */ |
3014 | relocation = st_size; | |
3015 | goto direct; | |
3016 | ||
fd8ab9e5 AJ |
3017 | case R_X86_64_PC8: |
3018 | case R_X86_64_PC16: | |
3019 | case R_X86_64_PC32: | |
c3320543 | 3020 | case R_X86_64_PC32_BND: |
6333bc0d | 3021 | /* Don't complain about -fPIC if the symbol is undefined when |
7073b5b9 L |
3022 | building executable unless it is unresolved weak symbol or |
3023 | -z nocopyreloc is used. */ | |
aec6b87e | 3024 | if ((input_section->flags & SEC_ALLOC) != 0 |
90f487df | 3025 | && (input_section->flags & SEC_READONLY) != 0 |
6333bc0d | 3026 | && h != NULL |
aec6b87e | 3027 | && ((bfd_link_executable (info) |
7073b5b9 L |
3028 | && ((h->root.type == bfd_link_hash_undefweak |
3029 | && !resolved_to_zero) | |
a5b4ee94 L |
3030 | || ((info->nocopyreloc |
3031 | || (eh->def_protected | |
3032 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
3033 | && h->def_dynamic |
3034 | && !(h->root.u.def.section->flags & SEC_CODE)))) | |
c5bb8910 | 3035 | || bfd_link_dll (info))) |
6610a52d | 3036 | { |
41bed6dd L |
3037 | bfd_boolean fail = FALSE; |
3038 | bfd_boolean branch | |
c3320543 L |
3039 | = ((r_type == R_X86_64_PC32 |
3040 | || r_type == R_X86_64_PC32_BND) | |
41bed6dd L |
3041 | && is_32bit_relative_branch (contents, rel->r_offset)); |
3042 | ||
6999821f | 3043 | if (SYMBOL_REFERENCES_LOCAL_P (info, h)) |
41bed6dd L |
3044 | { |
3045 | /* Symbol is referenced locally. Make sure it is | |
3046 | defined locally or for a branch. */ | |
8170f769 L |
3047 | fail = (!(h->def_regular || ELF_COMMON_DEF_P (h)) |
3048 | && !branch); | |
41bed6dd | 3049 | } |
aec6b87e | 3050 | else if (!(bfd_link_pie (info) |
bc696fd5 | 3051 | && (h->needs_copy || eh->needs_copy))) |
41bed6dd | 3052 | { |
9a926d55 L |
3053 | /* Symbol doesn't need copy reloc and isn't referenced |
3054 | locally. We only allow branch to symbol with | |
3055 | non-default visibility. */ | |
41bed6dd L |
3056 | fail = (!branch |
3057 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
3058 | } | |
3059 | ||
3060 | if (fail) | |
aab921ad | 3061 | return elf_x86_64_need_pic (info, input_bfd, input_section, |
338c190a | 3062 | h, NULL, NULL, howto); |
6610a52d L |
3063 | } |
3064 | /* Fall through. */ | |
3065 | ||
70256ad8 AJ |
3066 | case R_X86_64_8: |
3067 | case R_X86_64_16: | |
3068 | case R_X86_64_32: | |
d6ab8113 | 3069 | case R_X86_64_PC64: |
6b3db546 | 3070 | case R_X86_64_64: |
80643fbc | 3071 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 3072 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 3073 | |
1788fc08 | 3074 | direct: |
b1e24c02 | 3075 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
3076 | break; |
3077 | ||
aebcc8ff L |
3078 | need_copy_reloc_in_pie = (bfd_link_pie (info) |
3079 | && h != NULL | |
3080 | && (h->needs_copy | |
3081 | || eh->needs_copy | |
3082 | || (h->root.type | |
3083 | == bfd_link_hash_undefined)) | |
3084 | && (X86_PCREL_TYPE_P (r_type) | |
3085 | || X86_SIZE_TYPE_P (r_type))); | |
3086 | ||
3087 | if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type, | |
3088 | need_copy_reloc_in_pie, | |
3089 | resolved_to_zero, FALSE)) | |
70256ad8 AJ |
3090 | { |
3091 | Elf_Internal_Rela outrel; | |
b34976b6 | 3092 | bfd_boolean skip, relocate; |
c434dee6 | 3093 | asection *sreloc; |
70256ad8 AJ |
3094 | |
3095 | /* When generating a shared object, these relocations | |
3096 | are copied into the output file to be resolved at run | |
407443a3 | 3097 | time. */ |
b34976b6 AM |
3098 | skip = FALSE; |
3099 | relocate = FALSE; | |
70256ad8 | 3100 | |
c629eae0 JJ |
3101 | outrel.r_offset = |
3102 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 3103 | rel->r_offset); |
c629eae0 | 3104 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 3105 | skip = TRUE; |
0fb19cbc | 3106 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 3107 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
3108 | |
3109 | outrel.r_offset += (input_section->output_section->vma | |
3110 | + input_section->output_offset); | |
3111 | ||
3112 | if (skip) | |
0bb2d96a | 3113 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 3114 | |
e74399c4 | 3115 | else if (COPY_INPUT_RELOC_P (info, h, r_type)) |
70256ad8 | 3116 | { |
351f65ca | 3117 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 3118 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
3119 | } |
3120 | else | |
3121 | { | |
4c10bbaa L |
3122 | /* This symbol is local, or marked to become local. |
3123 | When relocation overflow check is disabled, we | |
3124 | convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
3125 | if (r_type == htab->pointer_r_type | |
3126 | || (r_type == R_X86_64_32 | |
3127 | && info->no_reloc_overflow_check)) | |
607c0e09 | 3128 | { |
b34976b6 | 3129 | relocate = TRUE; |
351f65ca | 3130 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
3131 | outrel.r_addend = relocation + rel->r_addend; |
3132 | } | |
64d25c44 L |
3133 | else if (r_type == R_X86_64_64 |
3134 | && !ABI_64_P (output_bfd)) | |
3135 | { | |
3136 | relocate = TRUE; | |
3137 | outrel.r_info = htab->r_info (0, | |
3138 | R_X86_64_RELATIVE64); | |
3139 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
3140 | /* Check addend overflow. */ |
3141 | if ((outrel.r_addend & 0x80000000) | |
3142 | != (rel->r_addend & 0x80000000)) | |
3143 | { | |
3144 | const char *name; | |
268a8d3a | 3145 | int addend = rel->r_addend; |
8cf0d2dd L |
3146 | if (h && h->root.root.string) |
3147 | name = h->root.root.string; | |
3148 | else | |
3149 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3150 | sym, NULL); | |
d42c267e AM |
3151 | _bfd_error_handler |
3152 | /* xgettext:c-format */ | |
3153 | (_("%B: addend %s%#x in relocation %s against " | |
3154 | "symbol `%s' at %#Lx in section `%A' is " | |
3155 | "out of range"), | |
3156 | input_bfd, addend < 0 ? "-" : "", addend, | |
3157 | howto->name, name, rel->r_offset, input_section); | |
8cf0d2dd L |
3158 | bfd_set_error (bfd_error_bad_value); |
3159 | return FALSE; | |
3160 | } | |
64d25c44 | 3161 | } |
607c0e09 AS |
3162 | else |
3163 | { | |
3164 | long sindx; | |
3165 | ||
8517fae7 | 3166 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
3167 | sindx = 0; |
3168 | else if (sec == NULL || sec->owner == NULL) | |
3169 | { | |
3170 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3171 | return FALSE; |
607c0e09 AS |
3172 | } |
3173 | else | |
3174 | { | |
3175 | asection *osec; | |
3176 | ||
74541ad4 AM |
3177 | /* We are turning this relocation into one |
3178 | against a section symbol. It would be | |
3179 | proper to subtract the symbol's value, | |
3180 | osec->vma, from the emitted reloc addend, | |
3181 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
3182 | osec = sec->output_section; |
3183 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
3184 | if (sindx == 0) |
3185 | { | |
3186 | asection *oi = htab->elf.text_index_section; | |
3187 | sindx = elf_section_data (oi)->dynindx; | |
3188 | } | |
3189 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
3190 | } |
3191 | ||
351f65ca | 3192 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
3193 | outrel.r_addend = relocation + rel->r_addend; |
3194 | } | |
70256ad8 AJ |
3195 | } |
3196 | ||
cbe950e9 | 3197 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 3198 | |
62d78908 L |
3199 | if (sreloc == NULL || sreloc->contents == NULL) |
3200 | { | |
3201 | r = bfd_reloc_notsupported; | |
3202 | goto check_relocation_error; | |
3203 | } | |
c434dee6 | 3204 | |
351f65ca | 3205 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
3206 | |
3207 | /* If this reloc is against an external symbol, we do | |
3208 | not want to fiddle with the addend. Otherwise, we | |
3209 | need to include the symbol value so that it becomes | |
3210 | an addend for the dynamic reloc. */ | |
0f88be7a | 3211 | if (! relocate) |
70256ad8 AJ |
3212 | continue; |
3213 | } | |
3214 | ||
3215 | break; | |
3216 | ||
bffbf940 | 3217 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
3218 | case R_X86_64_GOTPC32_TLSDESC: |
3219 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 3220 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
3221 | tls_type = GOT_UNKNOWN; |
3222 | if (h == NULL && local_got_offsets) | |
0afcef53 | 3223 | tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 3224 | else if (h != NULL) |
0afcef53 | 3225 | tls_type = elf_x86_hash_entry (h)->tls_type; |
142411ca | 3226 | |
419414ea | 3227 | r_type_tls = r_type; |
351f65ca L |
3228 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3229 | input_section, contents, | |
3230 | symtab_hdr, sym_hashes, | |
419414ea | 3231 | &r_type_tls, tls_type, rel, |
bedfd056 | 3232 | relend, h, r_symndx, TRUE)) |
534a31f6 | 3233 | return FALSE; |
bffbf940 | 3234 | |
419414ea | 3235 | if (r_type_tls == R_X86_64_TPOFF32) |
bffbf940 | 3236 | { |
142411ca L |
3237 | bfd_vma roff = rel->r_offset; |
3238 | ||
bffbf940 | 3239 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 3240 | |
419414ea | 3241 | if (r_type == R_X86_64_TLSGD) |
bffbf940 | 3242 | { |
52bc799a | 3243 | /* GD->LE transition. For 64bit, change |
e2cbcd91 L |
3244 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3245 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3246 | or | |
3247 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3248 | .byte 0x66; rex64 | |
3249 | call *__tls_get_addr@GOTPCREL(%rip) | |
3250 | which may be converted to | |
3251 | addr32 call __tls_get_addr | |
52bc799a | 3252 | into: |
e2cbcd91 L |
3253 | movq %fs:0, %rax |
3254 | leaq foo@tpoff(%rax), %rax | |
52bc799a | 3255 | For 32bit, change |
e2cbcd91 L |
3256 | leaq foo@tlsgd(%rip), %rdi |
3257 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3258 | or | |
3259 | leaq foo@tlsgd(%rip), %rdi | |
3260 | .byte 0x66; rex64 | |
3261 | call *__tls_get_addr@GOTPCREL(%rip) | |
3262 | which may be converted to | |
3263 | addr32 call __tls_get_addr | |
52bc799a | 3264 | into: |
e2cbcd91 L |
3265 | movl %fs:0, %eax |
3266 | leaq foo@tpoff(%rax), %rax | |
5c98a14e | 3267 | For largepic, change: |
e2cbcd91 L |
3268 | leaq foo@tlsgd(%rip), %rdi |
3269 | movabsq $__tls_get_addr@pltoff, %rax | |
3270 | addq %r15, %rax | |
3271 | call *%rax | |
5c98a14e | 3272 | into: |
e2cbcd91 L |
3273 | movq %fs:0, %rax |
3274 | leaq foo@tpoff(%rax), %rax | |
3275 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 3276 | int largepic = 0; |
e2cbcd91 | 3277 | if (ABI_64_P (output_bfd)) |
5c98a14e | 3278 | { |
e2cbcd91 L |
3279 | if (contents[roff + 5] == 0xb8) |
3280 | { | |
3281 | memcpy (contents + roff - 3, | |
3282 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
3283 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
3284 | largepic = 1; | |
3285 | } | |
3286 | else | |
3287 | memcpy (contents + roff - 4, | |
3288 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3289 | 16); | |
5c98a14e | 3290 | } |
52bc799a L |
3291 | else |
3292 | memcpy (contents + roff - 3, | |
3293 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3294 | 15); | |
eb4ff4d6 | 3295 | bfd_put_32 (output_bfd, |
351f65ca | 3296 | elf_x86_64_tpoff (info, relocation), |
5c98a14e | 3297 | contents + roff + 8 + largepic); |
e2cbcd91 L |
3298 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, |
3299 | R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */ | |
bffbf940 | 3300 | rel++; |
60f2e42e | 3301 | wrel++; |
bffbf940 JJ |
3302 | continue; |
3303 | } | |
419414ea | 3304 | else if (r_type == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
3305 | { |
3306 | /* GDesc -> LE transition. | |
3307 | It's originally something like: | |
3308 | leaq x@tlsdesc(%rip), %rax | |
3309 | ||
3310 | Change it to: | |
c9736ba0 | 3311 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 3312 | |
c9736ba0 | 3313 | unsigned int val, type; |
67a4f2b7 | 3314 | |
67a4f2b7 | 3315 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 3316 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
3317 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
3318 | contents + roff - 3); | |
3319 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
3320 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3321 | contents + roff - 1); | |
eb4ff4d6 | 3322 | bfd_put_32 (output_bfd, |
351f65ca | 3323 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
3324 | contents + roff); |
3325 | continue; | |
3326 | } | |
419414ea | 3327 | else if (r_type == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
3328 | { |
3329 | /* GDesc -> LE transition. | |
3330 | It's originally: | |
3331 | call *(%rax) | |
3332 | Turn it into: | |
142411ca | 3333 | xchg %ax,%ax. */ |
10efb593 | 3334 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
3335 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3336 | continue; | |
3337 | } | |
419414ea | 3338 | else if (r_type == R_X86_64_GOTTPOFF) |
bffbf940 | 3339 | { |
bffbf940 | 3340 | /* IE->LE transition: |
cf61b747 | 3341 | For 64bit, originally it can be one of: |
bffbf940 JJ |
3342 | movq foo@gottpoff(%rip), %reg |
3343 | addq foo@gottpoff(%rip), %reg | |
3344 | We change it into: | |
3345 | movq $foo, %reg | |
3346 | leaq foo(%reg), %reg | |
cf61b747 L |
3347 | addq $foo, %reg. |
3348 | For 32bit, originally it can be one of: | |
3349 | movq foo@gottpoff(%rip), %reg | |
3350 | addl foo@gottpoff(%rip), %reg | |
3351 | We change it into: | |
3352 | movq $foo, %reg | |
3353 | leal foo(%reg), %reg | |
3354 | addl $foo, %reg. */ | |
142411ca L |
3355 | |
3356 | unsigned int val, type, reg; | |
3357 | ||
cf61b747 L |
3358 | if (roff >= 3) |
3359 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
3360 | else | |
3361 | val = 0; | |
142411ca L |
3362 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
3363 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 3364 | reg >>= 3; |
bffbf940 JJ |
3365 | if (type == 0x8b) |
3366 | { | |
3367 | /* movq */ | |
3368 | if (val == 0x4c) | |
3369 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3370 | contents + roff - 3); |
4a4c5f25 L |
3371 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3372 | bfd_put_8 (output_bfd, 0x41, | |
3373 | contents + roff - 3); | |
bffbf940 | 3374 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 3375 | contents + roff - 2); |
bffbf940 | 3376 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3377 | contents + roff - 1); |
bffbf940 JJ |
3378 | } |
3379 | else if (reg == 4) | |
3380 | { | |
cf61b747 L |
3381 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
3382 | is special */ | |
bffbf940 JJ |
3383 | if (val == 0x4c) |
3384 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3385 | contents + roff - 3); |
4a4c5f25 L |
3386 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3387 | bfd_put_8 (output_bfd, 0x41, | |
3388 | contents + roff - 3); | |
bffbf940 | 3389 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 3390 | contents + roff - 2); |
bffbf940 | 3391 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3392 | contents + roff - 1); |
bffbf940 JJ |
3393 | } |
3394 | else | |
3395 | { | |
cf61b747 | 3396 | /* addq/addl -> leaq/leal */ |
bffbf940 JJ |
3397 | if (val == 0x4c) |
3398 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 3399 | contents + roff - 3); |
4a4c5f25 L |
3400 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3401 | bfd_put_8 (output_bfd, 0x45, | |
3402 | contents + roff - 3); | |
bffbf940 | 3403 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 3404 | contents + roff - 2); |
bffbf940 | 3405 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 3406 | contents + roff - 1); |
bffbf940 | 3407 | } |
eb4ff4d6 | 3408 | bfd_put_32 (output_bfd, |
351f65ca | 3409 | elf_x86_64_tpoff (info, relocation), |
142411ca | 3410 | contents + roff); |
bffbf940 JJ |
3411 | continue; |
3412 | } | |
142411ca L |
3413 | else |
3414 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
3415 | } |
3416 | ||
6de2ae4a | 3417 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3418 | abort (); |
3419 | ||
3420 | if (h != NULL) | |
67a4f2b7 AO |
3421 | { |
3422 | off = h->got.offset; | |
0afcef53 | 3423 | offplt = elf_x86_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 3424 | } |
bffbf940 JJ |
3425 | else |
3426 | { | |
3427 | if (local_got_offsets == NULL) | |
3428 | abort (); | |
3429 | ||
3430 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 3431 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
3432 | } |
3433 | ||
3434 | if ((off & 1) != 0) | |
3435 | off &= ~1; | |
26e41594 | 3436 | else |
bffbf940 JJ |
3437 | { |
3438 | Elf_Internal_Rela outrel; | |
bffbf940 | 3439 | int dr_type, indx; |
67a4f2b7 | 3440 | asection *sreloc; |
bffbf940 | 3441 | |
6de2ae4a | 3442 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3443 | abort (); |
3444 | ||
67a4f2b7 AO |
3445 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3446 | ||
3447 | if (GOT_TLS_GDESC_P (tls_type)) | |
3448 | { | |
351f65ca | 3449 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 3450 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
3451 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
3452 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
3453 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3454 | + offplt |
3455 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 3456 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 3457 | if (indx == 0) |
0afcef53 | 3458 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
67a4f2b7 AO |
3459 | else |
3460 | outrel.r_addend = 0; | |
351f65ca | 3461 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
3462 | } |
3463 | ||
6de2ae4a | 3464 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 3465 | |
6de2ae4a L |
3466 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3467 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 3468 | |
67a4f2b7 | 3469 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 3470 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
3471 | else if (GOT_TLS_GDESC_P (tls_type)) |
3472 | goto dr_done; | |
bffbf940 JJ |
3473 | else |
3474 | dr_type = R_X86_64_TPOFF64; | |
3475 | ||
6de2ae4a | 3476 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 3477 | outrel.r_addend = 0; |
67a4f2b7 AO |
3478 | if ((dr_type == R_X86_64_TPOFF64 |
3479 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
0afcef53 | 3480 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
351f65ca | 3481 | outrel.r_info = htab->r_info (indx, dr_type); |
bffbf940 | 3482 | |
351f65ca | 3483 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 3484 | |
67a4f2b7 | 3485 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
3486 | { |
3487 | if (indx == 0) | |
3488 | { | |
d40d037c | 3489 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 3490 | bfd_put_64 (output_bfd, |
0afcef53 | 3491 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3492 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
3493 | } |
3494 | else | |
3495 | { | |
3496 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3497 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 3498 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
3499 | R_X86_64_DTPOFF64); |
3500 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 3501 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 3502 | &outrel); |
bffbf940 JJ |
3503 | } |
3504 | } | |
3505 | ||
67a4f2b7 | 3506 | dr_done: |
bffbf940 JJ |
3507 | if (h != NULL) |
3508 | h->got.offset |= 1; | |
3509 | else | |
3510 | local_got_offsets[r_symndx] |= 1; | |
3511 | } | |
3512 | ||
67a4f2b7 AO |
3513 | if (off >= (bfd_vma) -2 |
3514 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 3515 | abort (); |
419414ea | 3516 | if (r_type_tls == r_type) |
bffbf940 | 3517 | { |
67a4f2b7 AO |
3518 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
3519 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
3520 | relocation = htab->elf.sgotplt->output_section->vma |
3521 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3522 | + offplt + htab->sgotplt_jump_table_size; |
3523 | else | |
6de2ae4a L |
3524 | relocation = htab->elf.sgot->output_section->vma |
3525 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3526 | unresolved_reloc = FALSE; |
bffbf940 | 3527 | } |
142411ca | 3528 | else |
67a4f2b7 | 3529 | { |
142411ca | 3530 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 3531 | |
419414ea | 3532 | if (r_type == R_X86_64_TLSGD) |
142411ca | 3533 | { |
52bc799a | 3534 | /* GD->IE transition. For 64bit, change |
e2cbcd91 L |
3535 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3536 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3537 | or | |
3538 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3539 | .byte 0x66; rex64 | |
3540 | call *__tls_get_addr@GOTPCREL(%rip | |
3541 | which may be converted to | |
3542 | addr32 call __tls_get_addr | |
52bc799a | 3543 | into: |
e2cbcd91 L |
3544 | movq %fs:0, %rax |
3545 | addq foo@gottpoff(%rip), %rax | |
52bc799a | 3546 | For 32bit, change |
e2cbcd91 L |
3547 | leaq foo@tlsgd(%rip), %rdi |
3548 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3549 | or | |
3550 | leaq foo@tlsgd(%rip), %rdi | |
3551 | .byte 0x66; rex64; | |
3552 | call *__tls_get_addr@GOTPCREL(%rip) | |
3553 | which may be converted to | |
3554 | addr32 call __tls_get_addr | |
52bc799a | 3555 | into: |
e2cbcd91 L |
3556 | movl %fs:0, %eax |
3557 | addq foo@gottpoff(%rip), %rax | |
5c98a14e | 3558 | For largepic, change: |
e2cbcd91 L |
3559 | leaq foo@tlsgd(%rip), %rdi |
3560 | movabsq $__tls_get_addr@pltoff, %rax | |
3561 | addq %r15, %rax | |
3562 | call *%rax | |
5c98a14e | 3563 | into: |
e2cbcd91 L |
3564 | movq %fs:0, %rax |
3565 | addq foo@gottpoff(%rax), %rax | |
3566 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 3567 | int largepic = 0; |
e2cbcd91 | 3568 | if (ABI_64_P (output_bfd)) |
5c98a14e | 3569 | { |
e2cbcd91 L |
3570 | if (contents[roff + 5] == 0xb8) |
3571 | { | |
3572 | memcpy (contents + roff - 3, | |
3573 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
3574 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
3575 | largepic = 1; | |
3576 | } | |
3577 | else | |
3578 | memcpy (contents + roff - 4, | |
3579 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3580 | 16); | |
5c98a14e | 3581 | } |
52bc799a L |
3582 | else |
3583 | memcpy (contents + roff - 3, | |
3584 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3585 | 15); | |
142411ca | 3586 | |
6de2ae4a L |
3587 | relocation = (htab->elf.sgot->output_section->vma |
3588 | + htab->elf.sgot->output_offset + off | |
142411ca | 3589 | - roff |
5c98a14e | 3590 | - largepic |
142411ca L |
3591 | - input_section->output_section->vma |
3592 | - input_section->output_offset | |
3593 | - 12); | |
3594 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
3595 | contents + roff + 8 + largepic); |
3596 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 3597 | rel++; |
60f2e42e | 3598 | wrel++; |
142411ca L |
3599 | continue; |
3600 | } | |
419414ea | 3601 | else if (r_type == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
3602 | { |
3603 | /* GDesc -> IE transition. | |
3604 | It's originally something like: | |
3605 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 3606 | |
142411ca | 3607 | Change it to: |
c9736ba0 | 3608 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 3609 | |
142411ca L |
3610 | /* Now modify the instruction as appropriate. To |
3611 | turn a leaq into a movq in the form we use it, it | |
3612 | suffices to change the second byte from 0x8d to | |
3613 | 0x8b. */ | |
3614 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
3615 | ||
3616 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
3617 | htab->elf.sgot->output_section->vma |
3618 | + htab->elf.sgot->output_offset + off | |
142411ca L |
3619 | - rel->r_offset |
3620 | - input_section->output_section->vma | |
3621 | - input_section->output_offset | |
3622 | - 4, | |
3623 | contents + roff); | |
3624 | continue; | |
3625 | } | |
419414ea | 3626 | else if (r_type == R_X86_64_TLSDESC_CALL) |
142411ca L |
3627 | { |
3628 | /* GDesc -> IE transition. | |
3629 | It's originally: | |
3630 | call *(%rax) | |
3631 | ||
3632 | Change it to: | |
c9736ba0 | 3633 | xchg %ax, %ax. */ |
142411ca | 3634 | |
142411ca L |
3635 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
3636 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
3637 | continue; | |
3638 | } | |
3639 | else | |
3640 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 3641 | } |
bffbf940 JJ |
3642 | break; |
3643 | ||
3644 | case R_X86_64_TLSLD: | |
351f65ca L |
3645 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3646 | input_section, contents, | |
3647 | symtab_hdr, sym_hashes, | |
bedfd056 L |
3648 | &r_type, GOT_UNKNOWN, rel, |
3649 | relend, h, r_symndx, TRUE)) | |
142411ca | 3650 | return FALSE; |
a3fadc9a | 3651 | |
142411ca L |
3652 | if (r_type != R_X86_64_TLSLD) |
3653 | { | |
bffbf940 | 3654 | /* LD->LE transition: |
e2cbcd91 L |
3655 | leaq foo@tlsld(%rip), %rdi |
3656 | call __tls_get_addr@PLT | |
3657 | For 64bit, we change it into: | |
3658 | .word 0x6666; .byte 0x66; movq %fs:0, %rax | |
3659 | For 32bit, we change it into: | |
3660 | nopl 0x0(%rax); movl %fs:0, %eax | |
3661 | Or | |
3662 | leaq foo@tlsld(%rip), %rdi; | |
3663 | call *__tls_get_addr@GOTPCREL(%rip) | |
3664 | which may be converted to | |
3665 | addr32 call __tls_get_addr | |
52bc799a | 3666 | For 64bit, we change it into: |
e2cbcd91 | 3667 | .word 0x6666; .word 0x6666; movq %fs:0, %rax |
52bc799a | 3668 | For 32bit, we change it into: |
e2cbcd91 | 3669 | nopw 0x0(%rax); movl %fs:0, %eax |
5c98a14e | 3670 | For largepic, change: |
e2cbcd91 L |
3671 | leaq foo@tlsgd(%rip), %rdi |
3672 | movabsq $__tls_get_addr@pltoff, %rax | |
3673 | addq %rbx, %rax | |
3674 | call *%rax | |
3675 | into | |
3676 | data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
3677 | movq %fs:0, %eax */ | |
142411ca L |
3678 | |
3679 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
e2cbcd91 L |
3680 | if (ABI_64_P (output_bfd)) |
3681 | { | |
3682 | if (contents[rel->r_offset + 5] == 0xb8) | |
3683 | memcpy (contents + rel->r_offset - 3, | |
3684 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
3685 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
3686 | else if (contents[rel->r_offset + 4] == 0xff | |
3687 | || contents[rel->r_offset + 4] == 0x67) | |
3688 | memcpy (contents + rel->r_offset - 3, | |
3689 | "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", | |
3690 | 13); | |
3691 | else | |
3692 | memcpy (contents + rel->r_offset - 3, | |
3693 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
3694 | } | |
52bc799a | 3695 | else |
e2cbcd91 L |
3696 | { |
3697 | if (contents[rel->r_offset + 4] == 0xff) | |
3698 | memcpy (contents + rel->r_offset - 3, | |
3699 | "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", | |
3700 | 13); | |
3701 | else | |
3702 | memcpy (contents + rel->r_offset - 3, | |
3703 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
3704 | } | |
3705 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX | |
3706 | and R_X86_64_PLTOFF64. */ | |
bffbf940 | 3707 | rel++; |
60f2e42e | 3708 | wrel++; |
bffbf940 JJ |
3709 | continue; |
3710 | } | |
3711 | ||
6de2ae4a | 3712 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3713 | abort (); |
3714 | ||
0afcef53 | 3715 | off = htab->tls_ld_or_ldm_got.offset; |
bffbf940 JJ |
3716 | if (off & 1) |
3717 | off &= ~1; | |
3718 | else | |
3719 | { | |
3720 | Elf_Internal_Rela outrel; | |
bffbf940 | 3721 | |
6de2ae4a | 3722 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3723 | abort (); |
3724 | ||
6de2ae4a L |
3725 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3726 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
3727 | |
3728 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3729 | htab->elf.sgot->contents + off); |
bffbf940 | 3730 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 3731 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 3732 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 3733 | outrel.r_addend = 0; |
351f65ca | 3734 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 3735 | &outrel); |
0afcef53 | 3736 | htab->tls_ld_or_ldm_got.offset |= 1; |
bffbf940 | 3737 | } |
6de2ae4a L |
3738 | relocation = htab->elf.sgot->output_section->vma |
3739 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3740 | unresolved_reloc = FALSE; |
bffbf940 JJ |
3741 | break; |
3742 | ||
3743 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
3744 | if (!bfd_link_executable (info) |
3745 | || (input_section->flags & SEC_CODE) == 0) | |
0afcef53 | 3746 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
bffbf940 | 3747 | else |
351f65ca | 3748 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
3749 | break; |
3750 | ||
3751 | case R_X86_64_TPOFF32: | |
6769d501 | 3752 | case R_X86_64_TPOFF64: |
0e1862bb | 3753 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 3754 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
3755 | break; |
3756 | ||
a69ed7f7 L |
3757 | case R_X86_64_DTPOFF64: |
3758 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
0afcef53 | 3759 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
a69ed7f7 L |
3760 | break; |
3761 | ||
70256ad8 AJ |
3762 | default: |
3763 | break; | |
3764 | } | |
8d88c4ca | 3765 | |
239e1f3a AM |
3766 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3767 | because such sections are not SEC_ALLOC and thus ld.so will | |
3768 | not process them. */ | |
c434dee6 | 3769 | if (unresolved_reloc |
239e1f3a | 3770 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
3771 | && h->def_dynamic) |
3772 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
3773 | rel->r_offset) != (bfd_vma) -1) | |
a040981f | 3774 | { |
7073b5b9 L |
3775 | switch (r_type) |
3776 | { | |
3777 | case R_X86_64_32S: | |
a5b4ee94 L |
3778 | sec = h->root.u.def.section; |
3779 | if ((info->nocopyreloc | |
3780 | || (eh->def_protected | |
3781 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
3782 | && !(h->root.u.def.section->flags & SEC_CODE)) |
3783 | return elf_x86_64_need_pic (info, input_bfd, input_section, | |
3784 | h, NULL, NULL, howto); | |
3785 | /* Fall through. */ | |
3786 | ||
3787 | default: | |
3788 | _bfd_error_handler | |
3789 | /* xgettext:c-format */ | |
3790 | (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"), | |
3791 | input_bfd, | |
3792 | input_section, | |
3793 | rel->r_offset, | |
3794 | howto->name, | |
3795 | h->root.root.string); | |
3796 | return FALSE; | |
3797 | } | |
a040981f | 3798 | } |
c434dee6 | 3799 | |
cbe950e9 | 3800 | do_relocation: |
8d88c4ca | 3801 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
3802 | contents, rel->r_offset, |
3803 | relocation, rel->r_addend); | |
8d88c4ca | 3804 | |
62d78908 | 3805 | check_relocation_error: |
8d88c4ca | 3806 | if (r != bfd_reloc_ok) |
8da6118f | 3807 | { |
c434dee6 AJ |
3808 | const char *name; |
3809 | ||
3810 | if (h != NULL) | |
3811 | name = h->root.root.string; | |
3812 | else | |
8da6118f | 3813 | { |
c434dee6 AJ |
3814 | name = bfd_elf_string_from_elf_section (input_bfd, |
3815 | symtab_hdr->sh_link, | |
3816 | sym->st_name); | |
3817 | if (name == NULL) | |
b34976b6 | 3818 | return FALSE; |
c434dee6 AJ |
3819 | if (*name == '\0') |
3820 | name = bfd_section_name (input_bfd, sec); | |
3821 | } | |
3822 | ||
3823 | if (r == bfd_reloc_overflow) | |
8b43e456 | 3824 | { |
78984959 | 3825 | if (converted_reloc) |
8b43e456 L |
3826 | { |
3827 | info->callbacks->einfo | |
3828 | (_("%F%P: failed to convert GOTPCREL relocation; relink with --no-relax\n")); | |
3829 | return FALSE; | |
3830 | } | |
3831 | (*info->callbacks->reloc_overflow) | |
3832 | (info, (h ? &h->root : NULL), name, howto->name, | |
3833 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
3834 | } | |
c434dee6 AJ |
3835 | else |
3836 | { | |
4eca0228 | 3837 | _bfd_error_handler |
695344c0 | 3838 | /* xgettext:c-format */ |
d42c267e | 3839 | (_("%B(%A+%#Lx): reloc against `%s': error %d"), |
d003868e | 3840 | input_bfd, input_section, |
d42c267e | 3841 | rel->r_offset, name, (int) r); |
b34976b6 | 3842 | return FALSE; |
8da6118f KH |
3843 | } |
3844 | } | |
60f2e42e L |
3845 | |
3846 | if (wrel != rel) | |
3847 | *wrel = *rel; | |
3848 | } | |
3849 | ||
3850 | if (wrel != rel) | |
3851 | { | |
3852 | Elf_Internal_Shdr *rel_hdr; | |
3853 | size_t deleted = rel - wrel; | |
3854 | ||
3855 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
3856 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
3857 | if (rel_hdr->sh_size == 0) | |
3858 | { | |
3859 | /* It is too late to remove an empty reloc section. Leave | |
3860 | one NONE reloc. | |
3861 | ??? What is wrong with an empty section??? */ | |
3862 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
3863 | deleted -= 1; | |
3864 | } | |
3865 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
3866 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
3867 | input_section->reloc_count -= deleted; | |
8d88c4ca | 3868 | } |
70256ad8 | 3869 | |
b34976b6 | 3870 | return TRUE; |
70256ad8 AJ |
3871 | } |
3872 | ||
3873 | /* Finish up dynamic symbol handling. We set the contents of various | |
3874 | dynamic sections here. */ | |
3875 | ||
b34976b6 | 3876 | static bfd_boolean |
351f65ca L |
3877 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
3878 | struct bfd_link_info *info, | |
3879 | struct elf_link_hash_entry *h, | |
aec6b87e | 3880 | Elf_Internal_Sym *sym) |
70256ad8 | 3881 | { |
0afcef53 | 3882 | struct elf_x86_link_hash_table *htab; |
f2c29a16 | 3883 | bfd_boolean use_plt_second; |
0afcef53 | 3884 | struct elf_x86_link_hash_entry *eh; |
aec6b87e | 3885 | bfd_boolean local_undefweak; |
70256ad8 | 3886 | |
0afcef53 | 3887 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
3888 | if (htab == NULL) |
3889 | return FALSE; | |
70256ad8 | 3890 | |
f2c29a16 L |
3891 | /* Use the second PLT section only if there is .plt section. */ |
3892 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
0ff2b86e | 3893 | |
0afcef53 | 3894 | eh = (struct elf_x86_link_hash_entry *) h; |
9e9821dd L |
3895 | if (eh->no_finish_dynamic_symbol) |
3896 | abort (); | |
dd7e64d4 | 3897 | |
aec6b87e L |
3898 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
3899 | resolved undefined weak symbols in executable so that their | |
3900 | references have value 0 at run-time. */ | |
c5bce5c6 | 3901 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); |
aec6b87e | 3902 | |
70256ad8 AJ |
3903 | if (h->plt.offset != (bfd_vma) -1) |
3904 | { | |
70256ad8 | 3905 | bfd_vma plt_index; |
38b12349 | 3906 | bfd_vma got_offset, plt_offset; |
70256ad8 | 3907 | Elf_Internal_Rela rela; |
947216bf | 3908 | bfd_byte *loc; |
0ff2b86e | 3909 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 3910 | const struct elf_backend_data *bed; |
5974eba6 | 3911 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
3912 | |
3913 | /* When building a static executable, use .iplt, .igot.plt and | |
3914 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 3915 | if (htab->elf.splt != NULL) |
cbe950e9 | 3916 | { |
6de2ae4a L |
3917 | plt = htab->elf.splt; |
3918 | gotplt = htab->elf.sgotplt; | |
3919 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
3920 | } |
3921 | else | |
3922 | { | |
6de2ae4a L |
3923 | plt = htab->elf.iplt; |
3924 | gotplt = htab->elf.igotplt; | |
3925 | relplt = htab->elf.irelplt; | |
cbe950e9 | 3926 | } |
70256ad8 | 3927 | |
f3180fa9 | 3928 | VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak) |
70256ad8 AJ |
3929 | |
3930 | /* Get the index in the procedure linkage table which | |
3931 | corresponds to this symbol. This is the index of this symbol | |
3932 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 3933 | first entry in the procedure linkage table is reserved. |
6bbec505 | 3934 | |
cbe950e9 | 3935 | Get the offset into the .got table of the entry that |
407443a3 | 3936 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
3937 | bytes. The first three are reserved for the dynamic linker. |
3938 | ||
3939 | For static executables, we don't reserve anything. */ | |
3940 | ||
6de2ae4a | 3941 | if (plt == htab->elf.splt) |
cbe950e9 | 3942 | { |
765e526c L |
3943 | got_offset = (h->plt.offset / htab->plt.plt_entry_size |
3944 | - htab->plt.has_plt0); | |
e1f98742 | 3945 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
3946 | } |
3947 | else | |
3948 | { | |
765e526c | 3949 | got_offset = h->plt.offset / htab->plt.plt_entry_size; |
e1f98742 | 3950 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 3951 | } |
70256ad8 | 3952 | |
38b12349 | 3953 | /* Fill in the entry in the procedure linkage table. */ |
765e526c L |
3954 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, |
3955 | htab->plt.plt_entry_size); | |
f2c29a16 | 3956 | if (use_plt_second) |
0ff2b86e | 3957 | { |
f2c29a16 | 3958 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
765e526c L |
3959 | htab->non_lazy_plt->plt_entry, |
3960 | htab->non_lazy_plt->plt_entry_size); | |
0ff2b86e | 3961 | |
f2c29a16 L |
3962 | resolved_plt = htab->plt_second; |
3963 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
3964 | } |
3965 | else | |
3966 | { | |
0ff2b86e L |
3967 | resolved_plt = plt; |
3968 | plt_offset = h->plt.offset; | |
3969 | } | |
eed180f8 RM |
3970 | |
3971 | /* Insert the relocation positions of the plt section. */ | |
3972 | ||
3973 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
3974 | subtracting the size of that instruction. */ | |
ab7fede8 L |
3975 | plt_got_pcrel_offset = (gotplt->output_section->vma |
3976 | + gotplt->output_offset | |
3977 | + got_offset | |
3978 | - resolved_plt->output_section->vma | |
3979 | - resolved_plt->output_offset | |
3980 | - plt_offset | |
765e526c | 3981 | - htab->plt.plt_got_insn_size); |
ab7fede8 L |
3982 | |
3983 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 3984 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
695344c0 | 3985 | /* xgettext:c-format */ |
ab7fede8 L |
3986 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"), |
3987 | output_bfd, h->root.root.string); | |
3988 | ||
3989 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
38b12349 | 3990 | (resolved_plt->contents + plt_offset |
765e526c | 3991 | + htab->plt.plt_got_offset)); |
cbe950e9 | 3992 | |
653165cc | 3993 | /* Fill in the entry in the global offset table, initially this |
aec6b87e L |
3994 | points to the second part of the PLT entry. Leave the entry |
3995 | as zero for undefined weak symbol in PIE. No PLT relocation | |
3996 | against undefined weak symbol in PIE. */ | |
3997 | if (!local_undefweak) | |
cbe950e9 | 3998 | { |
765e526c | 3999 | if (htab->plt.has_plt0) |
38b12349 L |
4000 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4001 | + plt->output_offset | |
4002 | + h->plt.offset | |
765e526c | 4003 | + htab->lazy_plt->plt_lazy_offset), |
38b12349 | 4004 | gotplt->contents + got_offset); |
aec6b87e L |
4005 | |
4006 | /* Fill in the entry in the .rela.plt section. */ | |
4007 | rela.r_offset = (gotplt->output_section->vma | |
4008 | + gotplt->output_offset | |
4009 | + got_offset); | |
cf1070f1 | 4010 | if (PLT_LOCAL_IFUNC_P (info, h)) |
aec6b87e | 4011 | { |
6322e5c5 L |
4012 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
4013 | h->root.root.string, | |
4014 | h->root.u.def.section->owner); | |
4015 | ||
aec6b87e L |
4016 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
4017 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
4018 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); | |
4019 | rela.r_addend = (h->root.u.def.value | |
4020 | + h->root.u.def.section->output_section->vma | |
4021 | + h->root.u.def.section->output_offset); | |
4022 | /* R_X86_64_IRELATIVE comes last. */ | |
4023 | plt_index = htab->next_irelative_index--; | |
4024 | } | |
4025 | else | |
4026 | { | |
4027 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); | |
4028 | rela.r_addend = 0; | |
4029 | plt_index = htab->next_jump_slot_index++; | |
4030 | } | |
e1f98742 | 4031 | |
38b12349 L |
4032 | /* Don't fill the second and third slots in PLT entry for |
4033 | static executables nor without PLT0. */ | |
765e526c | 4034 | if (plt == htab->elf.splt && htab->plt.has_plt0) |
aec6b87e | 4035 | { |
38b12349 | 4036 | bfd_vma plt0_offset |
765e526c | 4037 | = h->plt.offset + htab->lazy_plt->plt_plt_insn_end; |
aec6b87e L |
4038 | |
4039 | /* Put relocation index. */ | |
4040 | bfd_put_32 (output_bfd, plt_index, | |
4041 | (plt->contents + h->plt.offset | |
765e526c | 4042 | + htab->lazy_plt->plt_reloc_offset)); |
aec6b87e L |
4043 | |
4044 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
4045 | check relocation index for overflow since branch displacement | |
4046 | will overflow first. */ | |
4047 | if (plt0_offset > 0x80000000) | |
695344c0 | 4048 | /* xgettext:c-format */ |
aec6b87e L |
4049 | info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"), |
4050 | output_bfd, h->root.root.string); | |
4051 | bfd_put_32 (output_bfd, - plt0_offset, | |
38b12349 | 4052 | (plt->contents + h->plt.offset |
765e526c | 4053 | + htab->lazy_plt->plt_plt_offset)); |
aec6b87e | 4054 | } |
351f65ca | 4055 | |
aec6b87e L |
4056 | bed = get_elf_backend_data (output_bfd); |
4057 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
4058 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
4059 | } | |
dd7e64d4 L |
4060 | } |
4061 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
4062 | { | |
38b12349 | 4063 | bfd_vma got_offset, plt_offset; |
dd7e64d4 L |
4064 | asection *plt, *got; |
4065 | bfd_boolean got_after_plt; | |
4066 | int32_t got_pcrel_offset; | |
dd7e64d4 L |
4067 | |
4068 | /* Set the entry in the GOT procedure linkage table. */ | |
4069 | plt = htab->plt_got; | |
4070 | got = htab->elf.sgot; | |
4071 | got_offset = h->got.offset; | |
4072 | ||
4073 | if (got_offset == (bfd_vma) -1 | |
e492d2f8 | 4074 | || (h->type == STT_GNU_IFUNC && h->def_regular) |
dd7e64d4 L |
4075 | || plt == NULL |
4076 | || got == NULL) | |
4077 | abort (); | |
70256ad8 | 4078 | |
38b12349 | 4079 | /* Use the non-lazy PLT entry template for the GOT PLT since they |
dd7e64d4 | 4080 | are the identical. */ |
dd7e64d4 L |
4081 | /* Fill in the entry in the GOT procedure linkage table. */ |
4082 | plt_offset = eh->plt_got.offset; | |
4083 | memcpy (plt->contents + plt_offset, | |
765e526c L |
4084 | htab->non_lazy_plt->plt_entry, |
4085 | htab->non_lazy_plt->plt_entry_size); | |
dd7e64d4 L |
4086 | |
4087 | /* Put offset the PC-relative instruction referring to the GOT | |
4088 | entry, subtracting the size of that instruction. */ | |
4089 | got_pcrel_offset = (got->output_section->vma | |
4090 | + got->output_offset | |
4091 | + got_offset | |
4092 | - plt->output_section->vma | |
4093 | - plt->output_offset | |
4094 | - plt_offset | |
765e526c | 4095 | - htab->non_lazy_plt->plt_got_insn_size); |
dd7e64d4 L |
4096 | |
4097 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
4098 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
4099 | if ((got_after_plt && got_pcrel_offset < 0) | |
4100 | || (!got_after_plt && got_pcrel_offset > 0)) | |
695344c0 | 4101 | /* xgettext:c-format */ |
dd7e64d4 L |
4102 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"), |
4103 | output_bfd, h->root.root.string); | |
4104 | ||
4105 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
38b12349 | 4106 | (plt->contents + plt_offset |
765e526c | 4107 | + htab->non_lazy_plt->plt_got_offset)); |
dd7e64d4 L |
4108 | } |
4109 | ||
aec6b87e L |
4110 | if (!local_undefweak |
4111 | && !h->def_regular | |
dd7e64d4 L |
4112 | && (h->plt.offset != (bfd_vma) -1 |
4113 | || eh->plt_got.offset != (bfd_vma) -1)) | |
4114 | { | |
4115 | /* Mark the symbol as undefined, rather than as defined in | |
4116 | the .plt section. Leave the value if there were any | |
4117 | relocations where pointer equality matters (this is a clue | |
4118 | for the dynamic linker, to make function pointer | |
4119 | comparisons work between an application and shared | |
4120 | library), otherwise set it to zero. If a function is only | |
4121 | called from a binary, there is no need to slow down | |
4122 | shared libraries because of that. */ | |
4123 | sym->st_shndx = SHN_UNDEF; | |
4124 | if (!h->pointer_equality_needed) | |
4125 | sym->st_value = 0; | |
70256ad8 AJ |
4126 | } |
4127 | ||
aec6b87e L |
4128 | /* Don't generate dynamic GOT relocation against undefined weak |
4129 | symbol in executable. */ | |
bffbf940 | 4130 | if (h->got.offset != (bfd_vma) -1 |
0afcef53 L |
4131 | && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h)->tls_type) |
4132 | && elf_x86_hash_entry (h)->tls_type != GOT_TLS_IE | |
aec6b87e | 4133 | && !local_undefweak) |
053579d7 | 4134 | { |
053579d7 | 4135 | Elf_Internal_Rela rela; |
233cc9c1 | 4136 | asection *relgot = htab->elf.srelgot; |
053579d7 AJ |
4137 | |
4138 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 4139 | up. */ |
6de2ae4a | 4140 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 4141 | abort (); |
053579d7 | 4142 | |
6de2ae4a L |
4143 | rela.r_offset = (htab->elf.sgot->output_section->vma |
4144 | + htab->elf.sgot->output_offset | |
dc810e39 | 4145 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
4146 | |
4147 | /* If this is a static link, or it is a -Bsymbolic link and the | |
4148 | symbol is defined locally or was forced to be local because | |
4149 | of a version file, we just want to emit a RELATIVE reloc. | |
4150 | The entry in the global offset table will already have been | |
4151 | initialized in the relocate_section function. */ | |
710ab287 | 4152 | if (h->def_regular |
0018b0a3 L |
4153 | && h->type == STT_GNU_IFUNC) |
4154 | { | |
233cc9c1 L |
4155 | if (h->plt.offset == (bfd_vma) -1) |
4156 | { | |
4157 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
4158 | if (htab->elf.splt == NULL) | |
4159 | { | |
4160 | /* use .rel[a].iplt section to store .got relocations | |
4161 | in static executable. */ | |
4162 | relgot = htab->elf.irelplt; | |
4163 | } | |
6999821f | 4164 | if (SYMBOL_REFERENCES_LOCAL_P (info, h)) |
233cc9c1 | 4165 | { |
6322e5c5 | 4166 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
6322e5c5 L |
4167 | h->root.root.string, |
4168 | h->root.u.def.section->owner); | |
4169 | ||
233cc9c1 L |
4170 | rela.r_info = htab->r_info (0, |
4171 | R_X86_64_IRELATIVE); | |
4172 | rela.r_addend = (h->root.u.def.value | |
4173 | + h->root.u.def.section->output_section->vma | |
4174 | + h->root.u.def.section->output_offset); | |
4175 | } | |
4176 | else | |
4177 | goto do_glob_dat; | |
4178 | } | |
4179 | else if (bfd_link_pic (info)) | |
710ab287 L |
4180 | { |
4181 | /* Generate R_X86_64_GLOB_DAT. */ | |
4182 | goto do_glob_dat; | |
4183 | } | |
4184 | else | |
4185 | { | |
90d60710 | 4186 | asection *plt; |
aab82f4c | 4187 | bfd_vma plt_offset; |
90d60710 | 4188 | |
710ab287 L |
4189 | if (!h->pointer_equality_needed) |
4190 | abort (); | |
4191 | ||
4192 | /* For non-shared object, we can't use .got.plt, which | |
4193 | contains the real function addres if we need pointer | |
4194 | equality. We load the GOT entry with the PLT entry. */ | |
f2c29a16 | 4195 | if (htab->plt_second != NULL) |
aab82f4c | 4196 | { |
f2c29a16 L |
4197 | plt = htab->plt_second; |
4198 | plt_offset = eh->plt_second.offset; | |
aab82f4c L |
4199 | } |
4200 | else | |
4201 | { | |
4202 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
4203 | plt_offset = h->plt.offset; | |
4204 | } | |
710ab287 L |
4205 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4206 | + plt->output_offset | |
aab82f4c | 4207 | + plt_offset), |
6de2ae4a | 4208 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
4209 | return TRUE; |
4210 | } | |
0018b0a3 | 4211 | } |
0e1862bb | 4212 | else if (bfd_link_pic (info) |
6999821f | 4213 | && SYMBOL_REFERENCES_LOCAL_P (info, h)) |
053579d7 | 4214 | { |
ad71ce8d | 4215 | if (!(h->def_regular || ELF_COMMON_DEF_P (h))) |
41bed6dd | 4216 | return FALSE; |
cc78d0af | 4217 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 4218 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
4219 | rela.r_addend = (h->root.u.def.value |
4220 | + h->root.u.def.section->output_section->vma | |
4221 | + h->root.u.def.section->output_offset); | |
4222 | } | |
4223 | else | |
4224 | { | |
4225 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 4226 | do_glob_dat: |
c434dee6 | 4227 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4228 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 4229 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
4230 | rela.r_addend = 0; |
4231 | } | |
4232 | ||
233cc9c1 | 4233 | elf_append_rela (output_bfd, relgot, &rela); |
053579d7 AJ |
4234 | } |
4235 | ||
f5385ebf | 4236 | if (h->needs_copy) |
70256ad8 | 4237 | { |
70256ad8 | 4238 | Elf_Internal_Rela rela; |
5474d94f | 4239 | asection *s; |
70256ad8 AJ |
4240 | |
4241 | /* This symbol needs a copy reloc. Set it up. */ | |
ff38b4cc | 4242 | VERIFY_COPY_RELOC (h, htab) |
70256ad8 AJ |
4243 | |
4244 | rela.r_offset = (h->root.u.def.value | |
4245 | + h->root.u.def.section->output_section->vma | |
4246 | + h->root.u.def.section->output_offset); | |
351f65ca | 4247 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 4248 | rela.r_addend = 0; |
afbf7e8e | 4249 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
4250 | s = htab->elf.sreldynrelro; |
4251 | else | |
4252 | s = htab->elf.srelbss; | |
4253 | elf_append_rela (output_bfd, s, &rela); | |
70256ad8 AJ |
4254 | } |
4255 | ||
b34976b6 | 4256 | return TRUE; |
70256ad8 AJ |
4257 | } |
4258 | ||
c25bc9fc L |
4259 | /* Finish up local dynamic symbol handling. We set the contents of |
4260 | various dynamic sections here. */ | |
4261 | ||
4262 | static bfd_boolean | |
351f65ca | 4263 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
4264 | { |
4265 | struct elf_link_hash_entry *h | |
4266 | = (struct elf_link_hash_entry *) *slot; | |
4267 | struct bfd_link_info *info | |
eed180f8 | 4268 | = (struct bfd_link_info *) inf; |
c25bc9fc | 4269 | |
351f65ca | 4270 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
5f0f0847 | 4271 | info, h, NULL); |
c25bc9fc L |
4272 | } |
4273 | ||
aec6b87e L |
4274 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
4275 | here since undefined weak symbol may not be dynamic and may not be | |
4276 | called for elf_x86_64_finish_dynamic_symbol. */ | |
4277 | ||
4278 | static bfd_boolean | |
4279 | elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
4280 | void *inf) | |
4281 | { | |
4282 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
4283 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
4284 | ||
4285 | if (h->root.type != bfd_link_hash_undefweak | |
4286 | || h->dynindx != -1) | |
4287 | return TRUE; | |
4288 | ||
4289 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, | |
5f0f0847 | 4290 | info, h, NULL); |
aec6b87e L |
4291 | } |
4292 | ||
c434dee6 AJ |
4293 | /* Used to decide how to sort relocs in an optimal manner for the |
4294 | dynamic linker, before writing them out. */ | |
4295 | ||
4296 | static enum elf_reloc_type_class | |
cae1fbbb | 4297 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
4298 | const asection *rel_sec ATTRIBUTE_UNUSED, |
4299 | const Elf_Internal_Rela *rela) | |
c434dee6 | 4300 | { |
cae1fbbb L |
4301 | bfd *abfd = info->output_bfd; |
4302 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
0afcef53 L |
4303 | struct elf_x86_link_hash_table *htab |
4304 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
cae1fbbb | 4305 | |
d9e3b590 L |
4306 | if (htab->elf.dynsym != NULL |
4307 | && htab->elf.dynsym->contents != NULL) | |
4308 | { | |
4309 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
4310 | dynamic symbols. */ | |
4311 | unsigned long r_symndx = htab->r_sym (rela->r_info); | |
897463b1 L |
4312 | if (r_symndx != STN_UNDEF) |
4313 | { | |
4314 | Elf_Internal_Sym sym; | |
4315 | if (!bed->s->swap_symbol_in (abfd, | |
4316 | (htab->elf.dynsym->contents | |
4317 | + r_symndx * bed->s->sizeof_sym), | |
4318 | 0, &sym)) | |
4319 | abort (); | |
d9e3b590 | 4320 | |
897463b1 L |
4321 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
4322 | return reloc_class_ifunc; | |
4323 | } | |
d9e3b590 | 4324 | } |
cae1fbbb | 4325 | |
351f65ca | 4326 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 | 4327 | { |
c428ce9d L |
4328 | case R_X86_64_IRELATIVE: |
4329 | return reloc_class_ifunc; | |
c434dee6 | 4330 | case R_X86_64_RELATIVE: |
1da80baa | 4331 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
4332 | return reloc_class_relative; |
4333 | case R_X86_64_JUMP_SLOT: | |
4334 | return reloc_class_plt; | |
4335 | case R_X86_64_COPY: | |
4336 | return reloc_class_copy; | |
4337 | default: | |
4338 | return reloc_class_normal; | |
4339 | } | |
4340 | } | |
4341 | ||
70256ad8 AJ |
4342 | /* Finish up the dynamic sections. */ |
4343 | ||
b34976b6 | 4344 | static bfd_boolean |
351f65ca L |
4345 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
4346 | struct bfd_link_info *info) | |
70256ad8 | 4347 | { |
0afcef53 | 4348 | struct elf_x86_link_hash_table *htab; |
70256ad8 | 4349 | |
9577f60b | 4350 | htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info); |
4dfe6ac6 NC |
4351 | if (htab == NULL) |
4352 | return FALSE; | |
4353 | ||
9577f60b L |
4354 | if (! htab->elf.dynamic_sections_created) |
4355 | return TRUE; | |
70256ad8 | 4356 | |
9577f60b | 4357 | if (htab->elf.splt && htab->elf.splt->size > 0) |
e41b3a13 | 4358 | { |
9577f60b L |
4359 | elf_section_data (htab->elf.splt->output_section) |
4360 | ->this_hdr.sh_entsize = htab->plt.plt_entry_size; | |
e41b3a13 | 4361 | |
9577f60b | 4362 | if (htab->plt.has_plt0) |
fff53dae | 4363 | { |
9577f60b L |
4364 | /* Fill in the special first entry in the procedure linkage |
4365 | table. */ | |
4366 | memcpy (htab->elf.splt->contents, | |
4367 | htab->lazy_plt->plt0_entry, | |
4368 | htab->lazy_plt->plt0_entry_size); | |
4369 | /* Add offset for pushq GOT+8(%rip), since the instruction | |
4370 | uses 6 bytes subtract this value. */ | |
4371 | bfd_put_32 (output_bfd, | |
4372 | (htab->elf.sgotplt->output_section->vma | |
4373 | + htab->elf.sgotplt->output_offset | |
4374 | + 8 | |
4375 | - htab->elf.splt->output_section->vma | |
4376 | - htab->elf.splt->output_offset | |
4377 | - 6), | |
4378 | (htab->elf.splt->contents | |
4379 | + htab->lazy_plt->plt0_got1_offset)); | |
4380 | /* Add offset for the PC-relative instruction accessing | |
4381 | GOT+16, subtracting the offset to the end of that | |
4382 | instruction. */ | |
4383 | bfd_put_32 (output_bfd, | |
4384 | (htab->elf.sgotplt->output_section->vma | |
4385 | + htab->elf.sgotplt->output_offset | |
4386 | + 16 | |
4387 | - htab->elf.splt->output_section->vma | |
4388 | - htab->elf.splt->output_offset | |
4389 | - htab->lazy_plt->plt0_got2_insn_end), | |
4390 | (htab->elf.splt->contents | |
4391 | + htab->lazy_plt->plt0_got2_offset)); | |
fff53dae | 4392 | } |
fff53dae | 4393 | |
9577f60b | 4394 | if (htab->tlsdesc_plt) |
8361ed4d | 4395 | { |
9577f60b L |
4396 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
4397 | htab->elf.sgot->contents + htab->tlsdesc_got); | |
4398 | ||
4399 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, | |
4400 | htab->lazy_plt->plt0_entry, | |
4401 | htab->lazy_plt->plt0_entry_size); | |
4402 | ||
4403 | /* Add offset for pushq GOT+8(%rip), since the | |
4404 | instruction uses 6 bytes subtract this value. */ | |
4405 | bfd_put_32 (output_bfd, | |
4406 | (htab->elf.sgotplt->output_section->vma | |
4407 | + htab->elf.sgotplt->output_offset | |
4408 | + 8 | |
4409 | - htab->elf.splt->output_section->vma | |
4410 | - htab->elf.splt->output_offset | |
4411 | - htab->tlsdesc_plt | |
4412 | - 6), | |
4413 | (htab->elf.splt->contents | |
4414 | + htab->tlsdesc_plt | |
4415 | + htab->lazy_plt->plt0_got1_offset)); | |
4416 | /* Add offset for the PC-relative instruction accessing | |
4417 | GOT+TDG, where TDG stands for htab->tlsdesc_got, | |
4418 | subtracting the offset to the end of that | |
4419 | instruction. */ | |
4420 | bfd_put_32 (output_bfd, | |
4421 | (htab->elf.sgot->output_section->vma | |
4422 | + htab->elf.sgot->output_offset | |
4423 | + htab->tlsdesc_got | |
4424 | - htab->elf.splt->output_section->vma | |
4425 | - htab->elf.splt->output_offset | |
4426 | - htab->tlsdesc_plt | |
4427 | - htab->lazy_plt->plt0_got2_insn_end), | |
4428 | (htab->elf.splt->contents | |
4429 | + htab->tlsdesc_plt | |
4430 | + htab->lazy_plt->plt0_got2_offset)); | |
8361ed4d L |
4431 | } |
4432 | } | |
4433 | ||
aec6b87e L |
4434 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
4435 | if (bfd_link_pie (info)) | |
4436 | bfd_hash_traverse (&info->hash->table, | |
4437 | elf_x86_64_pie_finish_undefweak_symbol, | |
4438 | info); | |
4439 | ||
b34976b6 | 4440 | return TRUE; |
8d88c4ca NC |
4441 | } |
4442 | ||
233cc9c1 L |
4443 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
4444 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
4445 | It has to be done before elf_link_sort_relocs is called so that | |
4446 | dynamic relocations are properly sorted. */ | |
4447 | ||
4448 | static bfd_boolean | |
4449 | elf_x86_64_output_arch_local_syms | |
4450 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
4451 | struct bfd_link_info *info, | |
4452 | void *flaginfo ATTRIBUTE_UNUSED, | |
4453 | int (*func) (void *, const char *, | |
4454 | Elf_Internal_Sym *, | |
4455 | asection *, | |
4456 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
4457 | { | |
0afcef53 L |
4458 | struct elf_x86_link_hash_table *htab |
4459 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
233cc9c1 L |
4460 | if (htab == NULL) |
4461 | return FALSE; | |
4462 | ||
4463 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
4464 | htab_traverse (htab->loc_hash_table, | |
4465 | elf_x86_64_finish_local_dynamic_symbol, | |
4466 | info); | |
4467 | ||
4468 | return TRUE; | |
4469 | } | |
4470 | ||
38b12349 | 4471 | /* Forward declaration. */ |
765e526c | 4472 | static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt; |
38b12349 L |
4473 | |
4474 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all | |
4475 | dynamic relocations. */ | |
4476 | ||
4477 | static long | |
4478 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
4479 | long symcount ATTRIBUTE_UNUSED, | |
4480 | asymbol **syms ATTRIBUTE_UNUSED, | |
4481 | long dynsymcount, | |
4482 | asymbol **dynsyms, | |
4483 | asymbol **ret) | |
4484 | { | |
f493882d | 4485 | long count, i, n; |
38b12349 | 4486 | int j; |
38b12349 | 4487 | bfd_byte *plt_contents; |
f493882d | 4488 | long relsize; |
765e526c L |
4489 | const struct elf_x86_lazy_plt_layout *lazy_plt; |
4490 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
4491 | const struct elf_x86_lazy_plt_layout *lazy_bnd_plt; | |
4492 | const struct elf_x86_non_lazy_plt_layout *non_lazy_bnd_plt; | |
4493 | const struct elf_x86_lazy_plt_layout *lazy_ibt_plt; | |
4494 | const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt; | |
38b12349 | 4495 | asection *plt; |
f493882d L |
4496 | enum elf_x86_plt_type plt_type; |
4497 | struct elf_x86_plt plts[] = | |
144bed8d | 4498 | { |
38b12349 L |
4499 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
4500 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
f2c29a16 L |
4501 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, |
4502 | { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
dd9e66ee | 4503 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } |
38b12349 | 4504 | }; |
144bed8d | 4505 | |
38b12349 | 4506 | *ret = NULL; |
144bed8d | 4507 | |
38b12349 L |
4508 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
4509 | return 0; | |
144bed8d | 4510 | |
38b12349 L |
4511 | if (dynsymcount <= 0) |
4512 | return 0; | |
cca5b8b6 | 4513 | |
38b12349 L |
4514 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
4515 | if (relsize <= 0) | |
4516 | return -1; | |
4517 | ||
851b6fa1 | 4518 | if (get_elf_x86_backend_data (abfd)->target_os == is_normal) |
144bed8d | 4519 | { |
38b12349 L |
4520 | lazy_plt = &elf_x86_64_lazy_plt; |
4521 | non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
4522 | lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt; | |
4523 | non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt; | |
ee2fdd6f L |
4524 | if (ABI_64_P (abfd)) |
4525 | { | |
4526 | lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; | |
4527 | non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
4528 | } | |
4529 | else | |
4530 | { | |
4531 | lazy_ibt_plt = &elf_x32_lazy_ibt_plt; | |
4532 | non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
4533 | } | |
38b12349 L |
4534 | } |
4535 | else | |
4536 | { | |
4537 | lazy_plt = &elf_x86_64_nacl_plt; | |
4538 | non_lazy_plt = NULL; | |
4539 | lazy_bnd_plt = NULL; | |
4540 | non_lazy_bnd_plt = NULL; | |
ee2fdd6f L |
4541 | lazy_ibt_plt = NULL; |
4542 | non_lazy_ibt_plt = NULL; | |
38b12349 | 4543 | } |
144bed8d | 4544 | |
38b12349 L |
4545 | count = 0; |
4546 | for (j = 0; plts[j].name != NULL; j++) | |
4547 | { | |
4548 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
90efb642 | 4549 | if (plt == NULL || plt->size == 0) |
6f25f223 | 4550 | continue; |
533d0af0 | 4551 | |
38b12349 L |
4552 | /* Get the PLT section contents. */ |
4553 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
4554 | if (plt_contents == NULL) | |
4555 | break; | |
4556 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
4557 | plt_contents, 0, plt->size)) | |
4558 | { | |
4559 | free (plt_contents); | |
4560 | break; | |
4561 | } | |
144bed8d | 4562 | |
38b12349 L |
4563 | /* Check what kind of PLT it is. */ |
4564 | plt_type = plt_unknown; | |
90efb642 L |
4565 | if (plts[j].type == plt_unknown |
4566 | && (plt->size >= (lazy_plt->plt_entry_size | |
4567 | + lazy_plt->plt_entry_size))) | |
144bed8d | 4568 | { |
38b12349 L |
4569 | /* Match lazy PLT first. Need to check the first two |
4570 | instructions. */ | |
4571 | if ((memcmp (plt_contents, lazy_plt->plt0_entry, | |
4572 | lazy_plt->plt0_got1_offset) == 0) | |
4573 | && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6, | |
4574 | 2) == 0)) | |
4575 | plt_type = plt_lazy; | |
4576 | else if (lazy_bnd_plt != NULL | |
4577 | && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry, | |
4578 | lazy_bnd_plt->plt0_got1_offset) == 0) | |
4579 | && (memcmp (plt_contents + 6, | |
4580 | lazy_bnd_plt->plt0_entry + 6, 3) == 0)) | |
ec1f73bb | 4581 | { |
f2c29a16 | 4582 | plt_type = plt_lazy | plt_second; |
ee2fdd6f L |
4583 | /* The fist entry in the lazy IBT PLT is the same as the |
4584 | lazy BND PLT. */ | |
4585 | if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size, | |
4586 | lazy_ibt_plt->plt_entry, | |
4587 | lazy_ibt_plt->plt_got_offset) == 0)) | |
4588 | lazy_plt = lazy_ibt_plt; | |
4589 | else | |
4590 | lazy_plt = lazy_bnd_plt; | |
ec1f73bb | 4591 | } |
144bed8d | 4592 | } |
fca6ae69 | 4593 | |
38b12349 | 4594 | if (non_lazy_plt != NULL |
90efb642 L |
4595 | && (plt_type == plt_unknown || plt_type == plt_non_lazy) |
4596 | && plt->size >= non_lazy_plt->plt_entry_size) | |
38b12349 L |
4597 | { |
4598 | /* Match non-lazy PLT. */ | |
4599 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
4600 | non_lazy_plt->plt_got_offset) == 0) | |
4601 | plt_type = plt_non_lazy; | |
4602 | } | |
4603 | ||
ee2fdd6f | 4604 | if (plt_type == plt_unknown || plt_type == plt_second) |
38b12349 | 4605 | { |
ee2fdd6f | 4606 | if (non_lazy_bnd_plt != NULL |
90efb642 | 4607 | && plt->size >= non_lazy_bnd_plt->plt_entry_size |
ee2fdd6f L |
4608 | && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry, |
4609 | non_lazy_bnd_plt->plt_got_offset) == 0)) | |
38b12349 | 4610 | { |
ee2fdd6f | 4611 | /* Match BND PLT. */ |
f2c29a16 | 4612 | plt_type = plt_second; |
38b12349 L |
4613 | non_lazy_plt = non_lazy_bnd_plt; |
4614 | } | |
ee2fdd6f | 4615 | else if (non_lazy_ibt_plt != NULL |
90efb642 | 4616 | && plt->size >= non_lazy_ibt_plt->plt_entry_size |
ee2fdd6f L |
4617 | && (memcmp (plt_contents, |
4618 | non_lazy_ibt_plt->plt_entry, | |
4619 | non_lazy_ibt_plt->plt_got_offset) == 0)) | |
4620 | { | |
4621 | /* Match IBT PLT. */ | |
4622 | plt_type = plt_second; | |
4623 | non_lazy_plt = non_lazy_ibt_plt; | |
4624 | } | |
38b12349 L |
4625 | } |
4626 | ||
4627 | if (plt_type == plt_unknown) | |
37c0b6ee L |
4628 | { |
4629 | free (plt_contents); | |
4630 | continue; | |
4631 | } | |
38b12349 L |
4632 | |
4633 | plts[j].sec = plt; | |
4634 | plts[j].type = plt_type; | |
4635 | ||
4636 | if ((plt_type & plt_lazy)) | |
4637 | { | |
4638 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
4639 | plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size; | |
4640 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
4641 | /* Skip PLT0 in lazy PLT. */ | |
4642 | i = 1; | |
4643 | } | |
4644 | else | |
4645 | { | |
4646 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
4647 | plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size; | |
4648 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
4649 | i = 0; | |
4650 | } | |
4651 | ||
f2c29a16 L |
4652 | /* Skip lazy PLT when the second PLT is used. */ |
4653 | if (plt_type == (plt_lazy | plt_second)) | |
38b12349 L |
4654 | plts[j].count = 0; |
4655 | else | |
4656 | { | |
4657 | n = plt->size / plts[j].plt_entry_size; | |
4658 | plts[j].count = n; | |
4659 | count += n - i; | |
4660 | } | |
4661 | ||
4662 | plts[j].contents = plt_contents; | |
144bed8d L |
4663 | } |
4664 | ||
f493882d L |
4665 | return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize, |
4666 | (bfd_vma) 0, plts, dynsyms, | |
4667 | ret); | |
0ff2b86e L |
4668 | } |
4669 | ||
d2b2c203 DJ |
4670 | /* Handle an x86-64 specific section when reading an object file. This |
4671 | is called when elfcode.h finds a section with an unknown type. */ | |
4672 | ||
4673 | static bfd_boolean | |
0c723101 L |
4674 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
4675 | const char *name, int shindex) | |
d2b2c203 DJ |
4676 | { |
4677 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
4678 | return FALSE; | |
4679 | ||
6dc132d9 | 4680 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
4681 | return FALSE; |
4682 | ||
4683 | return TRUE; | |
4684 | } | |
4685 | ||
3b22753a L |
4686 | /* Hook called by the linker routine which adds symbols from an object |
4687 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
4688 | of .bss. */ | |
4689 | ||
4690 | static bfd_boolean | |
351f65ca | 4691 | elf_x86_64_add_symbol_hook (bfd *abfd, |
a43942db | 4692 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
351f65ca L |
4693 | Elf_Internal_Sym *sym, |
4694 | const char **namep ATTRIBUTE_UNUSED, | |
4695 | flagword *flagsp ATTRIBUTE_UNUSED, | |
4696 | asection **secp, | |
4697 | bfd_vma *valp) | |
3b22753a L |
4698 | { |
4699 | asection *lcomm; | |
4700 | ||
4701 | switch (sym->st_shndx) | |
4702 | { | |
4703 | case SHN_X86_64_LCOMMON: | |
4704 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
4705 | if (lcomm == NULL) | |
4706 | { | |
4707 | lcomm = bfd_make_section_with_flags (abfd, | |
4708 | "LARGE_COMMON", | |
4709 | (SEC_ALLOC | |
4710 | | SEC_IS_COMMON | |
4711 | | SEC_LINKER_CREATED)); | |
4712 | if (lcomm == NULL) | |
4713 | return FALSE; | |
4714 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
4715 | } | |
4716 | *secp = lcomm; | |
4717 | *valp = sym->st_size; | |
c35bdf6e | 4718 | return TRUE; |
3b22753a | 4719 | } |
d8045f23 | 4720 | |
3b22753a L |
4721 | return TRUE; |
4722 | } | |
4723 | ||
4724 | ||
4725 | /* Given a BFD section, try to locate the corresponding ELF section | |
4726 | index. */ | |
4727 | ||
4728 | static bfd_boolean | |
351f65ca L |
4729 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
4730 | asection *sec, int *index_return) | |
3b22753a L |
4731 | { |
4732 | if (sec == &_bfd_elf_large_com_section) | |
4733 | { | |
91d6fa6a | 4734 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
4735 | return TRUE; |
4736 | } | |
4737 | return FALSE; | |
4738 | } | |
4739 | ||
4740 | /* Process a symbol. */ | |
4741 | ||
4742 | static void | |
351f65ca L |
4743 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
4744 | asymbol *asym) | |
3b22753a L |
4745 | { |
4746 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
4747 | ||
4748 | switch (elfsym->internal_elf_sym.st_shndx) | |
4749 | { | |
4750 | case SHN_X86_64_LCOMMON: | |
4751 | asym->section = &_bfd_elf_large_com_section; | |
4752 | asym->value = elfsym->internal_elf_sym.st_size; | |
4753 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
4754 | asym->flags &= ~BSF_GLOBAL; | |
4755 | break; | |
4756 | } | |
4757 | } | |
4758 | ||
4759 | static bfd_boolean | |
351f65ca | 4760 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
4761 | { |
4762 | return (sym->st_shndx == SHN_COMMON | |
4763 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
4764 | } | |
4765 | ||
4766 | static unsigned int | |
351f65ca | 4767 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
4768 | { |
4769 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
4770 | return SHN_COMMON; | |
4771 | else | |
4772 | return SHN_X86_64_LCOMMON; | |
4773 | } | |
4774 | ||
4775 | static asection * | |
351f65ca | 4776 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
4777 | { |
4778 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
4779 | return bfd_com_section_ptr; | |
4780 | else | |
4781 | return &_bfd_elf_large_com_section; | |
4782 | } | |
4783 | ||
4784 | static bfd_boolean | |
5d13b3b3 AM |
4785 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
4786 | const Elf_Internal_Sym *sym, | |
351f65ca | 4787 | asection **psec, |
5d13b3b3 AM |
4788 | bfd_boolean newdef, |
4789 | bfd_boolean olddef, | |
351f65ca | 4790 | bfd *oldbfd, |
5d13b3b3 | 4791 | const asection *oldsec) |
3b22753a L |
4792 | { |
4793 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
4794 | normal common symbol. We turn the large common symbol into a |
4795 | normal one. */ | |
5d13b3b3 | 4796 | if (!olddef |
3b22753a | 4797 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
4798 | && !newdef |
4799 | && bfd_is_com_section (*psec) | |
4800 | && oldsec != *psec) | |
3b22753a | 4801 | { |
00492999 | 4802 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 4803 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
4804 | { |
4805 | h->root.u.c.p->section | |
4806 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
4807 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
4808 | } | |
4809 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
4810 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
4811 | *psec = bfd_com_section_ptr; | |
3b22753a L |
4812 | } |
4813 | ||
4814 | return TRUE; | |
4815 | } | |
4816 | ||
4817 | static int | |
351f65ca L |
4818 | elf_x86_64_additional_program_headers (bfd *abfd, |
4819 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
4820 | { |
4821 | asection *s; | |
9a2e389a | 4822 | int count = 0; |
3b22753a L |
4823 | |
4824 | /* Check to see if we need a large readonly segment. */ | |
4825 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
4826 | if (s && (s->flags & SEC_LOAD)) | |
4827 | count++; | |
4828 | ||
4829 | /* Check to see if we need a large data segment. Since .lbss sections | |
4830 | is placed right after the .bss section, there should be no need for | |
4831 | a large data segment just because of .lbss. */ | |
4832 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
4833 | if (s && (s->flags & SEC_LOAD)) | |
4834 | count++; | |
4835 | ||
4836 | return count; | |
4837 | } | |
4838 | ||
c543bf9a L |
4839 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
4840 | ||
4841 | static bfd_boolean | |
4842 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
4843 | const bfd_target *output) | |
4844 | { | |
4845 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
4846 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
4847 | && _bfd_elf_relocs_compatible (input, output)); | |
4848 | } | |
4849 | ||
38b12349 L |
4850 | /* Set up x86-64 GNU properties. Return the first relocatable ELF input |
4851 | with GNU properties if found. Otherwise, return NULL. */ | |
4852 | ||
4853 | static bfd * | |
4854 | elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info) | |
4855 | { | |
1de031c8 | 4856 | struct elf_x86_init_table init_table; |
ee2fdd6f | 4857 | |
78984959 L |
4858 | if ((int) R_X86_64_standard >= (int) R_X86_64_converted_reloc_bit |
4859 | || (int) R_X86_64_max <= (int) R_X86_64_converted_reloc_bit | |
4860 | || ((int) (R_X86_64_GNU_VTINHERIT | R_X86_64_converted_reloc_bit) | |
4861 | != (int) R_X86_64_GNU_VTINHERIT) | |
4862 | || ((int) (R_X86_64_GNU_VTENTRY | R_X86_64_converted_reloc_bit) | |
4863 | != (int) R_X86_64_GNU_VTENTRY)) | |
4864 | abort (); | |
4865 | ||
851b6fa1 L |
4866 | /* This is unused for x86-64. */ |
4867 | init_table.plt0_pad_byte = 0x90; | |
4868 | ||
4869 | if (get_elf_x86_backend_data (info->output_bfd)->target_os | |
4870 | == is_normal) | |
73784fa5 | 4871 | { |
a6798bab | 4872 | if (info->bndplt) |
ee2fdd6f | 4873 | { |
1de031c8 L |
4874 | init_table.lazy_plt = &elf_x86_64_lazy_bnd_plt; |
4875 | init_table.non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt; | |
ee2fdd6f L |
4876 | } |
4877 | else | |
4878 | { | |
1de031c8 L |
4879 | init_table.lazy_plt = &elf_x86_64_lazy_plt; |
4880 | init_table.non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
ee2fdd6f | 4881 | } |
38b12349 | 4882 | |
a6798bab | 4883 | if (ABI_64_P (info->output_bfd)) |
38b12349 | 4884 | { |
1de031c8 L |
4885 | init_table.lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; |
4886 | init_table.non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
38b12349 L |
4887 | } |
4888 | else | |
4889 | { | |
1de031c8 L |
4890 | init_table.lazy_ibt_plt = &elf_x32_lazy_ibt_plt; |
4891 | init_table.non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
38b12349 | 4892 | } |
38b12349 L |
4893 | } |
4894 | else | |
4895 | { | |
1de031c8 L |
4896 | init_table.lazy_plt = &elf_x86_64_nacl_plt; |
4897 | init_table.non_lazy_plt = NULL; | |
4898 | init_table.lazy_ibt_plt = NULL; | |
4899 | init_table.non_lazy_ibt_plt = NULL; | |
38b12349 L |
4900 | } |
4901 | ||
7a382c1c L |
4902 | if (ABI_64_P (info->output_bfd)) |
4903 | { | |
1de031c8 L |
4904 | init_table.r_info = elf64_r_info; |
4905 | init_table.r_sym = elf64_r_sym; | |
7a382c1c L |
4906 | } |
4907 | else | |
4908 | { | |
1de031c8 L |
4909 | init_table.r_info = elf32_r_info; |
4910 | init_table.r_sym = elf32_r_sym; | |
7a382c1c L |
4911 | } |
4912 | ||
1de031c8 | 4913 | return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table); |
38b12349 L |
4914 | } |
4915 | ||
9a2e389a | 4916 | static const struct bfd_elf_special_section |
46bed679 | 4917 | elf_x86_64_special_sections[]= |
3b22753a | 4918 | { |
0112cd26 NC |
4919 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
4920 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
4921 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
4922 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
4923 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
4924 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
4925 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
4926 | }; |
4927 | ||
6d00b590 | 4928 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
4929 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
4930 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 4931 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 4932 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 4933 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 4934 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 4935 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
4936 | |
4937 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 4938 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
4939 | #define elf_backend_want_got_plt 1 |
4940 | #define elf_backend_plt_readonly 1 | |
4941 | #define elf_backend_want_plt_sym 0 | |
4942 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 4943 | #define elf_backend_rela_normal 1 |
e41b3a13 | 4944 | #define elf_backend_plt_alignment 4 |
f7483970 | 4945 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 4946 | #define elf_backend_caches_rawsize 1 |
64f52338 | 4947 | #define elf_backend_dtrel_excludes_plt 1 |
5474d94f | 4948 | #define elf_backend_want_dynrelro 1 |
70256ad8 | 4949 | |
351f65ca | 4950 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 4951 | |
351f65ca | 4952 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 4953 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 4954 | elf_x86_64_reloc_name_lookup |
70256ad8 | 4955 | |
c543bf9a | 4956 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca | 4957 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
38b12349 | 4958 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
351f65ca L |
4959 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections |
4960 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
233cc9c1 | 4961 | #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms |
351f65ca L |
4962 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus |
4963 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
4964 | #ifdef CORE_HEADER |
4965 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
4966 | #endif | |
351f65ca L |
4967 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
4968 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
74541ad4 | 4969 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 4970 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
0ff2b86e | 4971 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 4972 | |
d2b2c203 | 4973 | #define elf_backend_section_from_shdr \ |
351f65ca | 4974 | elf_x86_64_section_from_shdr |
d2b2c203 | 4975 | |
3b22753a | 4976 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 4977 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 4978 | #define elf_backend_add_symbol_hook \ |
351f65ca | 4979 | elf_x86_64_add_symbol_hook |
3b22753a | 4980 | #define elf_backend_symbol_processing \ |
351f65ca | 4981 | elf_x86_64_symbol_processing |
3b22753a | 4982 | #define elf_backend_common_section_index \ |
351f65ca | 4983 | elf_x86_64_common_section_index |
3b22753a | 4984 | #define elf_backend_common_section \ |
351f65ca | 4985 | elf_x86_64_common_section |
3b22753a | 4986 | #define elf_backend_common_definition \ |
351f65ca | 4987 | elf_x86_64_common_definition |
3b22753a | 4988 | #define elf_backend_merge_symbol \ |
351f65ca | 4989 | elf_x86_64_merge_symbol |
3b22753a | 4990 | #define elf_backend_special_sections \ |
351f65ca | 4991 | elf_x86_64_special_sections |
3b22753a | 4992 | #define elf_backend_additional_program_headers \ |
351f65ca | 4993 | elf_x86_64_additional_program_headers |
38b12349 | 4994 | #define elf_backend_setup_gnu_properties \ |
9f857535 L |
4995 | elf_x86_64_link_setup_gnu_properties |
4996 | #define elf_backend_hide_symbol \ | |
4997 | _bfd_x86_elf_hide_symbol | |
3b22753a | 4998 | |
8d88c4ca | 4999 | #include "elf64-target.h" |
9d7cbccd | 5000 | |
6036f486 ES |
5001 | /* CloudABI support. */ |
5002 | ||
5003 | #undef TARGET_LITTLE_SYM | |
5004 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec | |
5005 | #undef TARGET_LITTLE_NAME | |
5006 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" | |
5007 | ||
5008 | #undef ELF_OSABI | |
5009 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
5010 | ||
5011 | #undef elf64_bed | |
5012 | #define elf64_bed elf64_x86_64_cloudabi_bed | |
5013 | ||
5014 | #include "elf64-target.h" | |
5015 | ||
9d7cbccd NC |
5016 | /* FreeBSD support. */ |
5017 | ||
5018 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5019 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
9d7cbccd NC |
5020 | #undef TARGET_LITTLE_NAME |
5021 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
5022 | ||
d1036acb L |
5023 | #undef ELF_OSABI |
5024 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 5025 | |
9d7cbccd NC |
5026 | #undef elf64_bed |
5027 | #define elf64_bed elf64_x86_64_fbsd_bed | |
5028 | ||
5029 | #include "elf64-target.h" | |
8a9036a4 | 5030 | |
a6cc6b3b RO |
5031 | /* Solaris 2 support. */ |
5032 | ||
5033 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5034 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
5035 | #undef TARGET_LITTLE_NAME |
5036 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
5037 | ||
5038 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
5039 | objects won't be recognized. */ | |
5040 | #undef ELF_OSABI | |
5041 | ||
5042 | #undef elf64_bed | |
5043 | #define elf64_bed elf64_x86_64_sol2_bed | |
5044 | ||
7dc98aea RO |
5045 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
5046 | boundary. */ | |
84865015 | 5047 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
5048 | #define elf_backend_static_tls_alignment 16 |
5049 | ||
a6cc6b3b RO |
5050 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
5051 | ||
5052 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
5053 | File, p.63. */ | |
84865015 | 5054 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
5055 | #define elf_backend_want_plt_sym 1 |
5056 | ||
84865015 NC |
5057 | #undef elf_backend_strtab_flags |
5058 | #define elf_backend_strtab_flags SHF_STRINGS | |
5059 | ||
5060 | static bfd_boolean | |
5522f910 NC |
5061 | elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
5062 | bfd *obfd ATTRIBUTE_UNUSED, | |
5063 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
5064 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
5065 | { |
5066 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
5067 | and sh_link fields of Solaris specific section types. */ | |
5068 | return FALSE; | |
5069 | } | |
5070 | ||
5522f910 NC |
5071 | #undef elf_backend_copy_special_section_fields |
5072 | #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields | |
84865015 | 5073 | |
a6cc6b3b RO |
5074 | #include "elf64-target.h" |
5075 | ||
8059fb19 RM |
5076 | /* Native Client support. */ |
5077 | ||
64b384e1 RM |
5078 | static bfd_boolean |
5079 | elf64_x86_64_nacl_elf_object_p (bfd *abfd) | |
5080 | { | |
5081 | /* Set the right machine number for a NaCl x86-64 ELF64 file. */ | |
5082 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl); | |
5083 | return TRUE; | |
5084 | } | |
5085 | ||
8059fb19 | 5086 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5087 | #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec |
8059fb19 RM |
5088 | #undef TARGET_LITTLE_NAME |
5089 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
5090 | #undef elf64_bed | |
5091 | #define elf64_bed elf64_x86_64_nacl_bed | |
5092 | ||
5093 | #undef ELF_MAXPAGESIZE | |
5094 | #undef ELF_MINPAGESIZE | |
5095 | #undef ELF_COMMONPAGESIZE | |
5096 | #define ELF_MAXPAGESIZE 0x10000 | |
5097 | #define ELF_MINPAGESIZE 0x10000 | |
5098 | #define ELF_COMMONPAGESIZE 0x10000 | |
5099 | ||
5100 | /* Restore defaults. */ | |
5101 | #undef ELF_OSABI | |
5102 | #undef elf_backend_static_tls_alignment | |
5103 | #undef elf_backend_want_plt_sym | |
5104 | #define elf_backend_want_plt_sym 0 | |
84865015 | 5105 | #undef elf_backend_strtab_flags |
5522f910 | 5106 | #undef elf_backend_copy_special_section_fields |
8059fb19 RM |
5107 | |
5108 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
5109 | ||
5110 | #undef elf_backend_plt_alignment | |
5111 | #define elf_backend_plt_alignment 5 | |
5112 | #define NACL_PLT_ENTRY_SIZE 64 | |
5113 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
5114 | ||
5115 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
5116 | { | |
5117 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
5118 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ | |
5119 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
5120 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5121 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
5122 | ||
ea2d813e | 5123 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
70cc877f | 5124 | 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */ |
ea2d813e RM |
5125 | |
5126 | /* 32 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 5127 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 5128 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 5129 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 5130 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 5131 | 0x66, /* excess data16 prefix */ |
ea2d813e | 5132 | 0x90 /* nop */ |
8059fb19 RM |
5133 | }; |
5134 | ||
5135 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
5136 | { | |
5137 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
5138 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
5139 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5140 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
5141 | ||
5142 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
3ddf1bdd | 5143 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
5144 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
5145 | ||
5146 | /* Lazy GOT entries point here (32-byte aligned). */ | |
5147 | 0x68, /* pushq immediate */ | |
5148 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
5149 | 0xe9, /* jmp relative */ | |
5150 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
5151 | ||
5152 | /* 22 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 5153 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
5154 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
5155 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ | |
5156 | }; | |
5157 | ||
5158 | /* .eh_frame covering the .plt section. */ | |
5159 | ||
5160 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
5161 | { | |
5162 | #if (PLT_CIE_LENGTH != 20 \ | |
5163 | || PLT_FDE_LENGTH != 36 \ | |
5164 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
5165 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
851b6fa1 | 5166 | # error "Need elf_x86_backend_data parameters for eh_frame_plt offsets!" |
8059fb19 RM |
5167 | #endif |
5168 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
5169 | 0, 0, 0, 0, /* CIE ID */ | |
5170 | 1, /* CIE version */ | |
5171 | 'z', 'R', 0, /* Augmentation string */ | |
5172 | 1, /* Code alignment factor */ | |
5173 | 0x78, /* Data alignment factor */ | |
5174 | 16, /* Return address column */ | |
5175 | 1, /* Augmentation size */ | |
5176 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
5177 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
5178 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
5179 | DW_CFA_nop, DW_CFA_nop, | |
5180 | ||
5181 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
5182 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
5183 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
5184 | 0, 0, 0, 0, /* .plt size goes here */ | |
5185 | 0, /* Augmentation size */ | |
5186 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
5187 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
5188 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
5189 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
5190 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
5191 | 13, /* Block length */ | |
5192 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
5193 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
5194 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
5195 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
5196 | DW_CFA_nop, DW_CFA_nop | |
5197 | }; | |
5198 | ||
765e526c | 5199 | static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt = |
8059fb19 RM |
5200 | { |
5201 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ | |
765e526c | 5202 | NACL_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
8059fb19 RM |
5203 | elf_x86_64_nacl_plt_entry, /* plt_entry */ |
5204 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
5205 | 2, /* plt0_got1_offset */ | |
5206 | 9, /* plt0_got2_offset */ | |
5207 | 13, /* plt0_got2_insn_end */ | |
5208 | 3, /* plt_got_offset */ | |
5209 | 33, /* plt_reloc_offset */ | |
5210 | 38, /* plt_plt_offset */ | |
5211 | 7, /* plt_got_insn_size */ | |
5212 | 42, /* plt_plt_insn_end */ | |
5213 | 32, /* plt_lazy_offset */ | |
a6798bab L |
5214 | elf_x86_64_nacl_plt0_entry, /* pic_plt0_entry */ |
5215 | elf_x86_64_nacl_plt_entry, /* pic_plt_entry */ | |
8059fb19 | 5216 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ |
38b12349 L |
5217 | sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */ |
5218 | }; | |
5219 | ||
851b6fa1 | 5220 | static const struct elf_x86_backend_data elf_x86_64_nacl_arch_bed = |
38b12349 L |
5221 | { |
5222 | is_nacl /* os */ | |
8059fb19 RM |
5223 | }; |
5224 | ||
5225 | #undef elf_backend_arch_data | |
5226 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
5227 | ||
64b384e1 RM |
5228 | #undef elf_backend_object_p |
5229 | #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p | |
5a68afcf RM |
5230 | #undef elf_backend_modify_segment_map |
5231 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
5232 | #undef elf_backend_modify_program_headers | |
5233 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
5234 | #undef elf_backend_final_write_processing |
5235 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 5236 | |
8059fb19 RM |
5237 | #include "elf64-target.h" |
5238 | ||
5239 | /* Native Client x32 support. */ | |
5240 | ||
64b384e1 RM |
5241 | static bfd_boolean |
5242 | elf32_x86_64_nacl_elf_object_p (bfd *abfd) | |
5243 | { | |
5244 | /* Set the right machine number for a NaCl x86-64 ELF32 file. */ | |
5245 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl); | |
5246 | return TRUE; | |
5247 | } | |
5248 | ||
8059fb19 | 5249 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5250 | #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec |
8059fb19 RM |
5251 | #undef TARGET_LITTLE_NAME |
5252 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" | |
5253 | #undef elf32_bed | |
5254 | #define elf32_bed elf32_x86_64_nacl_bed | |
5255 | ||
8059fb19 RM |
5256 | #define bfd_elf32_bfd_reloc_type_lookup \ |
5257 | elf_x86_64_reloc_type_lookup | |
5258 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
5259 | elf_x86_64_reloc_name_lookup | |
b7365e5d L |
5260 | #define bfd_elf32_get_synthetic_symtab \ |
5261 | elf_x86_64_get_synthetic_symtab | |
8059fb19 RM |
5262 | |
5263 | #undef elf_backend_object_p | |
5264 | #define elf_backend_object_p \ | |
64b384e1 | 5265 | elf32_x86_64_nacl_elf_object_p |
8059fb19 RM |
5266 | |
5267 | #undef elf_backend_bfd_from_remote_memory | |
5268 | #define elf_backend_bfd_from_remote_memory \ | |
5269 | _bfd_elf32_bfd_from_remote_memory | |
5270 | ||
5271 | #undef elf_backend_size_info | |
5272 | #define elf_backend_size_info \ | |
5273 | _bfd_elf32_size_info | |
5274 | ||
5275 | #include "elf32-target.h" | |
5276 | ||
5277 | /* Restore defaults. */ | |
5a68afcf | 5278 | #undef elf_backend_object_p |
8059fb19 | 5279 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
5280 | #undef elf_backend_bfd_from_remote_memory |
5281 | #undef elf_backend_size_info | |
5282 | #undef elf_backend_modify_segment_map | |
5283 | #undef elf_backend_modify_program_headers | |
887badb3 | 5284 | #undef elf_backend_final_write_processing |
8059fb19 | 5285 | |
8a9036a4 L |
5286 | /* Intel L1OM support. */ |
5287 | ||
5288 | static bfd_boolean | |
5289 | elf64_l1om_elf_object_p (bfd *abfd) | |
5290 | { | |
5291 | /* Set the right machine number for an L1OM elf64 file. */ | |
5292 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
5293 | return TRUE; | |
5294 | } | |
5295 | ||
5296 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5297 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
5298 | #undef TARGET_LITTLE_NAME |
5299 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
5300 | #undef ELF_ARCH | |
5301 | #define ELF_ARCH bfd_arch_l1om | |
5302 | ||
5303 | #undef ELF_MACHINE_CODE | |
5304 | #define ELF_MACHINE_CODE EM_L1OM | |
5305 | ||
5306 | #undef ELF_OSABI | |
5307 | ||
5308 | #undef elf64_bed | |
5309 | #define elf64_bed elf64_l1om_bed | |
5310 | ||
5311 | #undef elf_backend_object_p | |
5312 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
5313 | ||
8059fb19 RM |
5314 | /* Restore defaults. */ |
5315 | #undef ELF_MAXPAGESIZE | |
5316 | #undef ELF_MINPAGESIZE | |
5317 | #undef ELF_COMMONPAGESIZE | |
5318 | #define ELF_MAXPAGESIZE 0x200000 | |
5319 | #define ELF_MINPAGESIZE 0x1000 | |
5320 | #define ELF_COMMONPAGESIZE 0x1000 | |
5321 | #undef elf_backend_plt_alignment | |
5322 | #define elf_backend_plt_alignment 4 | |
5323 | #undef elf_backend_arch_data | |
5324 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 5325 | |
8a9036a4 L |
5326 | #include "elf64-target.h" |
5327 | ||
5328 | /* FreeBSD L1OM support. */ | |
5329 | ||
5330 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5331 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
5332 | #undef TARGET_LITTLE_NAME |
5333 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
5334 | ||
5335 | #undef ELF_OSABI | |
5336 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5337 | ||
5338 | #undef elf64_bed | |
5339 | #define elf64_bed elf64_l1om_fbsd_bed | |
5340 | ||
8a9036a4 | 5341 | #include "elf64-target.h" |
351f65ca | 5342 | |
7a9068fe L |
5343 | /* Intel K1OM support. */ |
5344 | ||
5345 | static bfd_boolean | |
5346 | elf64_k1om_elf_object_p (bfd *abfd) | |
5347 | { | |
5348 | /* Set the right machine number for an K1OM elf64 file. */ | |
5349 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
5350 | return TRUE; | |
5351 | } | |
5352 | ||
5353 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5354 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
5355 | #undef TARGET_LITTLE_NAME |
5356 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
5357 | #undef ELF_ARCH | |
5358 | #define ELF_ARCH bfd_arch_k1om | |
5359 | ||
5360 | #undef ELF_MACHINE_CODE | |
5361 | #define ELF_MACHINE_CODE EM_K1OM | |
5362 | ||
5363 | #undef ELF_OSABI | |
5364 | ||
5365 | #undef elf64_bed | |
5366 | #define elf64_bed elf64_k1om_bed | |
5367 | ||
5368 | #undef elf_backend_object_p | |
5369 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
5370 | ||
5371 | #undef elf_backend_static_tls_alignment | |
5372 | ||
5373 | #undef elf_backend_want_plt_sym | |
5374 | #define elf_backend_want_plt_sym 0 | |
5375 | ||
5376 | #include "elf64-target.h" | |
5377 | ||
5378 | /* FreeBSD K1OM support. */ | |
5379 | ||
5380 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5381 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
5382 | #undef TARGET_LITTLE_NAME |
5383 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
5384 | ||
5385 | #undef ELF_OSABI | |
5386 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5387 | ||
5388 | #undef elf64_bed | |
5389 | #define elf64_bed elf64_k1om_fbsd_bed | |
5390 | ||
5391 | #include "elf64-target.h" | |
5392 | ||
351f65ca L |
5393 | /* 32bit x86-64 support. */ |
5394 | ||
351f65ca | 5395 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5396 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
5397 | #undef TARGET_LITTLE_NAME |
5398 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 5399 | #undef elf32_bed |
351f65ca L |
5400 | |
5401 | #undef ELF_ARCH | |
5402 | #define ELF_ARCH bfd_arch_i386 | |
5403 | ||
5404 | #undef ELF_MACHINE_CODE | |
5405 | #define ELF_MACHINE_CODE EM_X86_64 | |
5406 | ||
351f65ca L |
5407 | #undef ELF_OSABI |
5408 | ||
351f65ca L |
5409 | #undef elf_backend_object_p |
5410 | #define elf_backend_object_p \ | |
5411 | elf32_x86_64_elf_object_p | |
5412 | ||
5413 | #undef elf_backend_bfd_from_remote_memory | |
5414 | #define elf_backend_bfd_from_remote_memory \ | |
5415 | _bfd_elf32_bfd_from_remote_memory | |
5416 | ||
5417 | #undef elf_backend_size_info | |
5418 | #define elf_backend_size_info \ | |
5419 | _bfd_elf32_size_info | |
5420 | ||
5421 | #include "elf32-target.h" |