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351f65ca | 1 | /* X86-64 specific support for ELF |
219d1afa | 2 | Copyright (C) 2000-2018 Free Software Foundation, Inc. |
8d88c4ca NC |
3 | Contributed by Jan Hubicka <jh@suse.cz>. |
4 | ||
ae9a127f | 5 | This file is part of BFD, the Binary File Descriptor library. |
8d88c4ca | 6 | |
ae9a127f NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
ae9a127f | 10 | (at your option) any later version. |
8d88c4ca | 11 | |
ae9a127f NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
8d88c4ca | 16 | |
ae9a127f NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
8d88c4ca | 21 | |
0afcef53 | 22 | #include "elfxx-x86.h" |
5a68afcf | 23 | #include "elf-nacl.h" |
e41b3a13 | 24 | #include "dwarf2.h" |
d7921315 | 25 | #include "libiberty.h" |
8d88c4ca | 26 | |
56ceb5b5 | 27 | #include "opcode/i386.h" |
8d88c4ca NC |
28 | #include "elf/x86-64.h" |
29 | ||
8fd79e71 L |
30 | #ifdef CORE_HEADER |
31 | #include <stdarg.h> | |
32 | #include CORE_HEADER | |
33 | #endif | |
34 | ||
8d88c4ca NC |
35 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
36 | #define MINUS_ONE (~ (bfd_vma) 0) | |
37 | ||
351f65ca L |
38 | /* Since both 32-bit and 64-bit x86-64 encode relocation type in the |
39 | identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get | |
40 | relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE | |
41 | since they are the same. */ | |
42 | ||
8d88c4ca | 43 | /* The relocation "howto" table. Order of fields: |
7b81dfbb AJ |
44 | type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow, |
45 | special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */ | |
70256ad8 AJ |
46 | static reloc_howto_type x86_64_elf_howto_table[] = |
47 | { | |
6346d5ca | 48 | HOWTO(R_X86_64_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont, |
b34976b6 AM |
49 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, |
50 | FALSE), | |
51 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
52 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, | |
53 | FALSE), | |
54 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
55 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, | |
56 | TRUE), | |
57 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
58 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, | |
59 | FALSE), | |
60 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
61 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, | |
62 | TRUE), | |
63 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
64 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, | |
65 | FALSE), | |
66 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
67 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, | |
68 | MINUS_ONE, FALSE), | |
69 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
70 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, | |
71 | MINUS_ONE, FALSE), | |
72 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
73 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, | |
74 | MINUS_ONE, FALSE), | |
75 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
76 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, | |
77 | 0xffffffff, TRUE), | |
78 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, | |
79 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
80 | FALSE), | |
81 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
82 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, | |
83 | FALSE), | |
84 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
85 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), | |
b0360d8c | 86 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
b34976b6 | 87 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), |
ac2aa337 | 88 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
b34976b6 AM |
89 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), |
90 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
91 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), | |
92 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
93 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, | |
94 | MINUS_ONE, FALSE), | |
95 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
96 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, | |
97 | MINUS_ONE, FALSE), | |
98 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
99 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, | |
100 | MINUS_ONE, FALSE), | |
101 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
102 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, | |
103 | 0xffffffff, TRUE), | |
104 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
105 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, | |
106 | 0xffffffff, TRUE), | |
ac2aa337 | 107 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
b34976b6 AM |
108 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, |
109 | 0xffffffff, FALSE), | |
110 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
111 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, | |
112 | 0xffffffff, TRUE), | |
113 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
114 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, | |
115 | 0xffffffff, FALSE), | |
d6ab8113 JB |
116 | HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
117 | bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE, | |
118 | TRUE), | |
119 | HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
120 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", | |
121 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
122 | HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
123 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", | |
124 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
7b81dfbb AJ |
125 | HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, |
126 | bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE, | |
127 | FALSE), | |
128 | HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
129 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE, | |
130 | MINUS_ONE, TRUE), | |
131 | HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
132 | bfd_elf_generic_reloc, "R_X86_64_GOTPC64", | |
133 | FALSE, MINUS_ONE, MINUS_ONE, TRUE), | |
134 | HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
135 | bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE, | |
136 | MINUS_ONE, FALSE), | |
137 | HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
138 | bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE, | |
139 | MINUS_ONE, FALSE), | |
1788fc08 L |
140 | HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, |
141 | bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff, | |
142 | FALSE), | |
143 | HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned, | |
144 | bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE, | |
145 | FALSE), | |
67a4f2b7 AO |
146 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0, |
147 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
148 | "R_X86_64_GOTPC32_TLSDESC", | |
149 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
150 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0, | |
151 | complain_overflow_dont, bfd_elf_generic_reloc, | |
152 | "R_X86_64_TLSDESC_CALL", | |
153 | FALSE, 0, 0, FALSE), | |
154 | HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0, | |
155 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
156 | "R_X86_64_TLSDESC", | |
157 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
cbe950e9 L |
158 | HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
159 | bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE, | |
160 | MINUS_ONE, FALSE), | |
64d25c44 L |
161 | HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
162 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE, | |
163 | MINUS_ONE, FALSE), | |
c3320543 L |
164 | HOWTO(R_X86_64_PC32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
165 | bfd_elf_generic_reloc, "R_X86_64_PC32_BND", FALSE, 0xffffffff, 0xffffffff, | |
166 | TRUE), | |
167 | HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
168 | bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", FALSE, 0xffffffff, 0xffffffff, | |
169 | TRUE), | |
56ceb5b5 L |
170 | HOWTO(R_X86_64_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
171 | bfd_elf_generic_reloc, "R_X86_64_GOTPCRELX", FALSE, 0xffffffff, | |
172 | 0xffffffff, TRUE), | |
173 | HOWTO(R_X86_64_REX_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
174 | bfd_elf_generic_reloc, "R_X86_64_REX_GOTPCRELX", FALSE, 0xffffffff, | |
175 | 0xffffffff, TRUE), | |
fe4770f4 | 176 | |
a33d77bc JB |
177 | /* We have a gap in the reloc numbers here. |
178 | R_X86_64_standard counts the number up to this point, and | |
179 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
180 | R_X86_64_GNU_VT* to form an index into this table. */ | |
56ceb5b5 | 181 | #define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1) |
a33d77bc JB |
182 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
183 | ||
fe4770f4 | 184 | /* GNU extension to record C++ vtable hierarchy. */ |
b34976b6 AM |
185 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
186 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
187 | |
188 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
189 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
190 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
d7921315 L |
191 | FALSE), |
192 | ||
193 | /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */ | |
194 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
195 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
196 | FALSE) | |
8d88c4ca NC |
197 | }; |
198 | ||
78984959 L |
199 | /* Set if a relocation is converted from a GOTPCREL relocation. */ |
200 | #define R_X86_64_converted_reloc_bit (1 << 7) | |
201 | ||
daf1c414 | 202 | #define X86_PCREL_TYPE_P(TYPE) \ |
d8045f23 NC |
203 | ( ((TYPE) == R_X86_64_PC8) \ |
204 | || ((TYPE) == R_X86_64_PC16) \ | |
205 | || ((TYPE) == R_X86_64_PC32) \ | |
c3320543 | 206 | || ((TYPE) == R_X86_64_PC32_BND) \ |
d8045f23 NC |
207 | || ((TYPE) == R_X86_64_PC64)) |
208 | ||
aebcc8ff L |
209 | #define X86_SIZE_TYPE_P(TYPE) \ |
210 | ((TYPE) == R_X86_64_SIZE32 || (TYPE) == R_X86_64_SIZE64) | |
211 | ||
8d88c4ca | 212 | /* Map BFD relocs to the x86_64 elf relocs. */ |
70256ad8 AJ |
213 | struct elf_reloc_map |
214 | { | |
8d88c4ca NC |
215 | bfd_reloc_code_real_type bfd_reloc_val; |
216 | unsigned char elf_reloc_val; | |
217 | }; | |
218 | ||
dc810e39 | 219 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 220 | { |
70256ad8 AJ |
221 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
222 | { BFD_RELOC_64, R_X86_64_64, }, | |
223 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
224 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
225 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
226 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
227 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
228 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
229 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
230 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
231 | { BFD_RELOC_32, R_X86_64_32, }, | |
232 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
233 | { BFD_RELOC_16, R_X86_64_16, }, | |
234 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
235 | { BFD_RELOC_8, R_X86_64_8, }, | |
236 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
237 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
238 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
239 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
240 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
241 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
242 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
243 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
244 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
245 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
246 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
247 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
248 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
249 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
250 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
251 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
252 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
1788fc08 L |
253 | { BFD_RELOC_SIZE32, R_X86_64_SIZE32, }, |
254 | { BFD_RELOC_SIZE64, R_X86_64_SIZE64, }, | |
67a4f2b7 AO |
255 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
256 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
257 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
cbe950e9 | 258 | { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, }, |
56ceb5b5 L |
259 | { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND, }, |
260 | { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND, }, | |
261 | { BFD_RELOC_X86_64_GOTPCRELX, R_X86_64_GOTPCRELX, }, | |
262 | { BFD_RELOC_X86_64_REX_GOTPCRELX, R_X86_64_REX_GOTPCRELX, }, | |
fe4770f4 AJ |
263 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
264 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
265 | }; |
266 | ||
67a4f2b7 | 267 | static reloc_howto_type * |
351f65ca | 268 | elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) |
67a4f2b7 AO |
269 | { |
270 | unsigned i; | |
271 | ||
d7921315 L |
272 | if (r_type == (unsigned int) R_X86_64_32) |
273 | { | |
274 | if (ABI_64_P (abfd)) | |
275 | i = r_type; | |
276 | else | |
277 | i = ARRAY_SIZE (x86_64_elf_howto_table) - 1; | |
278 | } | |
279 | else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
280 | || r_type >= (unsigned int) R_X86_64_max) | |
67a4f2b7 AO |
281 | { |
282 | if (r_type >= (unsigned int) R_X86_64_standard) | |
283 | { | |
695344c0 | 284 | /* xgettext:c-format */ |
0aa13fee AM |
285 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
286 | abfd, r_type); | |
f3185997 NC |
287 | bfd_set_error (bfd_error_bad_value); |
288 | return NULL; | |
67a4f2b7 AO |
289 | } |
290 | i = r_type; | |
291 | } | |
292 | else | |
293 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
294 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
295 | return &x86_64_elf_howto_table[i]; | |
296 | } | |
8d88c4ca NC |
297 | |
298 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
299 | static reloc_howto_type * | |
351f65ca L |
300 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
301 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
302 | { |
303 | unsigned int i; | |
27482721 | 304 | |
8d88c4ca NC |
305 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
306 | i++) | |
307 | { | |
308 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
309 | return elf_x86_64_rtype_to_howto (abfd, |
310 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca | 311 | } |
5860e3f8 | 312 | return NULL; |
8d88c4ca NC |
313 | } |
314 | ||
157090f7 | 315 | static reloc_howto_type * |
d7921315 | 316 | elf_x86_64_reloc_name_lookup (bfd *abfd, |
351f65ca | 317 | const char *r_name) |
157090f7 AM |
318 | { |
319 | unsigned int i; | |
320 | ||
d7921315 L |
321 | if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0) |
322 | { | |
323 | /* Get x32 R_X86_64_32. */ | |
324 | reloc_howto_type *reloc | |
325 | = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1]; | |
326 | BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32); | |
327 | return reloc; | |
328 | } | |
329 | ||
330 | for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++) | |
157090f7 AM |
331 | if (x86_64_elf_howto_table[i].name != NULL |
332 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
333 | return &x86_64_elf_howto_table[i]; | |
334 | ||
335 | return NULL; | |
336 | } | |
337 | ||
8d88c4ca | 338 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 339 | |
f3185997 NC |
340 | static bfd_boolean |
341 | elf_x86_64_info_to_howto (bfd *abfd, arelent *cache_ptr, | |
351f65ca | 342 | Elf_Internal_Rela *dst) |
8d88c4ca | 343 | { |
67a4f2b7 | 344 | unsigned r_type; |
8d88c4ca | 345 | |
351f65ca | 346 | r_type = ELF32_R_TYPE (dst->r_info); |
78984959 L |
347 | if (r_type != (unsigned int) R_X86_64_GNU_VTINHERIT |
348 | && r_type != (unsigned int) R_X86_64_GNU_VTENTRY) | |
349 | r_type &= ~R_X86_64_converted_reloc_bit; | |
351f65ca | 350 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); |
f3185997 NC |
351 | if (cache_ptr->howto == NULL) |
352 | return FALSE; | |
262c0a87 | 353 | BFD_ASSERT (r_type == cache_ptr->howto->type || cache_ptr->howto->type == R_X86_64_NONE); |
f3185997 | 354 | return TRUE; |
8d88c4ca | 355 | } |
70256ad8 | 356 | \f |
3bab7989 | 357 | /* Support for core dump NOTE sections. */ |
b34976b6 | 358 | static bfd_boolean |
351f65ca | 359 | elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
360 | { |
361 | int offset; | |
eea6121a | 362 | size_t size; |
3bab7989 ML |
363 | |
364 | switch (note->descsz) | |
365 | { | |
366 | default: | |
b34976b6 | 367 | return FALSE; |
3bab7989 | 368 | |
bcd823f1 L |
369 | case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */ |
370 | /* pr_cursig */ | |
228e534f | 371 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
bcd823f1 L |
372 | |
373 | /* pr_pid */ | |
228e534f | 374 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
bcd823f1 L |
375 | |
376 | /* pr_reg */ | |
377 | offset = 72; | |
378 | size = 216; | |
379 | ||
380 | break; | |
381 | ||
3bab7989 ML |
382 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ |
383 | /* pr_cursig */ | |
228e534f | 384 | elf_tdata (abfd)->core->signal |
3bab7989 ML |
385 | = bfd_get_16 (abfd, note->descdata + 12); |
386 | ||
387 | /* pr_pid */ | |
228e534f | 388 | elf_tdata (abfd)->core->lwpid |
3bab7989 ML |
389 | = bfd_get_32 (abfd, note->descdata + 32); |
390 | ||
391 | /* pr_reg */ | |
392 | offset = 112; | |
eea6121a | 393 | size = 216; |
3bab7989 ML |
394 | |
395 | break; | |
396 | } | |
397 | ||
398 | /* Make a ".reg/999" section. */ | |
399 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 400 | size, note->descpos + offset); |
3bab7989 ML |
401 | } |
402 | ||
b34976b6 | 403 | static bfd_boolean |
351f65ca | 404 | elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
405 | { |
406 | switch (note->descsz) | |
407 | { | |
408 | default: | |
b34976b6 | 409 | return FALSE; |
3bab7989 | 410 | |
bcd823f1 | 411 | case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */ |
228e534f | 412 | elf_tdata (abfd)->core->pid |
bcd823f1 | 413 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 414 | elf_tdata (abfd)->core->program |
bcd823f1 | 415 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 416 | elf_tdata (abfd)->core->command |
bcd823f1 L |
417 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
418 | break; | |
419 | ||
3bab7989 | 420 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ |
228e534f | 421 | elf_tdata (abfd)->core->pid |
261b8d08 | 422 | = bfd_get_32 (abfd, note->descdata + 24); |
228e534f | 423 | elf_tdata (abfd)->core->program |
3bab7989 | 424 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
228e534f | 425 | elf_tdata (abfd)->core->command |
3bab7989 ML |
426 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
427 | } | |
428 | ||
429 | /* Note that for some reason, a spurious space is tacked | |
430 | onto the end of the args in some (at least one anyway) | |
431 | implementations, so strip it off if it exists. */ | |
432 | ||
433 | { | |
228e534f | 434 | char *command = elf_tdata (abfd)->core->command; |
3bab7989 ML |
435 | int n = strlen (command); |
436 | ||
437 | if (0 < n && command[n - 1] == ' ') | |
438 | command[n - 1] = '\0'; | |
439 | } | |
440 | ||
b34976b6 | 441 | return TRUE; |
3bab7989 | 442 | } |
8fd79e71 L |
443 | |
444 | #ifdef CORE_HEADER | |
445 | static char * | |
446 | elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz, | |
447 | int note_type, ...) | |
448 | { | |
449 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8fd79e71 L |
450 | va_list ap; |
451 | const char *fname, *psargs; | |
452 | long pid; | |
453 | int cursig; | |
454 | const void *gregs; | |
455 | ||
456 | switch (note_type) | |
457 | { | |
458 | default: | |
459 | return NULL; | |
460 | ||
461 | case NT_PRPSINFO: | |
462 | va_start (ap, note_type); | |
463 | fname = va_arg (ap, const char *); | |
464 | psargs = va_arg (ap, const char *); | |
465 | va_end (ap); | |
466 | ||
467 | if (bed->s->elfclass == ELFCLASS32) | |
468 | { | |
469 | prpsinfo32_t data; | |
470 | memset (&data, 0, sizeof (data)); | |
471 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
472 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
473 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
474 | &data, sizeof (data)); | |
8fd79e71 L |
475 | } |
476 | else | |
477 | { | |
b1bd052d | 478 | prpsinfo64_t data; |
8fd79e71 L |
479 | memset (&data, 0, sizeof (data)); |
480 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
481 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
482 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
483 | &data, sizeof (data)); | |
8fd79e71 | 484 | } |
e85c6a70 | 485 | /* NOTREACHED */ |
8fd79e71 L |
486 | |
487 | case NT_PRSTATUS: | |
488 | va_start (ap, note_type); | |
489 | pid = va_arg (ap, long); | |
490 | cursig = va_arg (ap, int); | |
491 | gregs = va_arg (ap, const void *); | |
492 | va_end (ap); | |
493 | ||
494 | if (bed->s->elfclass == ELFCLASS32) | |
495 | { | |
496 | if (bed->elf_machine_code == EM_X86_64) | |
497 | { | |
498 | prstatusx32_t prstat; | |
499 | memset (&prstat, 0, sizeof (prstat)); | |
500 | prstat.pr_pid = pid; | |
501 | prstat.pr_cursig = cursig; | |
502 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
503 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
504 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
505 | } |
506 | else | |
507 | { | |
508 | prstatus32_t prstat; | |
509 | memset (&prstat, 0, sizeof (prstat)); | |
510 | prstat.pr_pid = pid; | |
511 | prstat.pr_cursig = cursig; | |
512 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
513 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
514 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
515 | } |
516 | } | |
517 | else | |
518 | { | |
b1bd052d | 519 | prstatus64_t prstat; |
8fd79e71 L |
520 | memset (&prstat, 0, sizeof (prstat)); |
521 | prstat.pr_pid = pid; | |
522 | prstat.pr_cursig = cursig; | |
523 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
524 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
525 | &prstat, sizeof (prstat)); | |
8fd79e71 | 526 | } |
8fd79e71 | 527 | } |
e85c6a70 | 528 | /* NOTREACHED */ |
8fd79e71 L |
529 | } |
530 | #endif | |
3bab7989 | 531 | \f |
407443a3 | 532 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 533 | |
70256ad8 AJ |
534 | /* The size in bytes of an entry in the global offset table. */ |
535 | ||
536 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 537 | |
38b12349 | 538 | /* The size in bytes of an entry in the lazy procedure linkage table. */ |
8d88c4ca | 539 | |
38b12349 | 540 | #define LAZY_PLT_ENTRY_SIZE 16 |
70256ad8 | 541 | |
38b12349 L |
542 | /* The size in bytes of an entry in the non-lazy procedure linkage |
543 | table. */ | |
70256ad8 | 544 | |
38b12349 L |
545 | #define NON_LAZY_PLT_ENTRY_SIZE 8 |
546 | ||
547 | /* The first entry in a lazy procedure linkage table looks like this. | |
548 | See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this | |
549 | works. */ | |
550 | ||
551 | static const bfd_byte elf_x86_64_lazy_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
70256ad8 | 552 | { |
653165cc AJ |
553 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
554 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 555 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
556 | }; |
557 | ||
38b12349 | 558 | /* Subsequent entries in a lazy procedure linkage table look like this. */ |
70256ad8 | 559 | |
38b12349 | 560 | static const bfd_byte elf_x86_64_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
70256ad8 | 561 | { |
653165cc | 562 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 563 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 564 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
565 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
566 | 0xe9, /* jmp relative */ | |
567 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
568 | }; | |
569 | ||
38b12349 | 570 | /* The first entry in a lazy procedure linkage table with BND prefix |
0ff2b86e L |
571 | like this. */ |
572 | ||
38b12349 | 573 | static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 574 | { |
07d6d2b8 | 575 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
0ff2b86e | 576 | 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */ |
07d6d2b8 | 577 | 0x0f, 0x1f, 0 /* nopl (%rax) */ |
0ff2b86e L |
578 | }; |
579 | ||
38b12349 L |
580 | /* Subsequent entries for branches with BND prefx in a lazy procedure |
581 | linkage table look like this. */ | |
0ff2b86e | 582 | |
38b12349 | 583 | static const bfd_byte elf_x86_64_lazy_bnd_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 584 | { |
07d6d2b8 AM |
585 | 0x68, 0, 0, 0, 0, /* pushq immediate */ |
586 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
587 | 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */ | |
0ff2b86e L |
588 | }; |
589 | ||
ee2fdd6f L |
590 | /* The first entry in the IBT-enabled lazy procedure linkage table is the |
591 | the same as the lazy PLT with BND prefix so that bound registers are | |
592 | preserved when control is passed to dynamic linker. Subsequent | |
593 | entries for a IBT-enabled lazy procedure linkage table look like | |
594 | this. */ | |
595 | ||
596 | static const bfd_byte elf_x86_64_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
597 | { | |
07d6d2b8 AM |
598 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
599 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
600 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
601 | 0x90 /* nop */ | |
ee2fdd6f L |
602 | }; |
603 | ||
604 | /* The first entry in the x32 IBT-enabled lazy procedure linkage table | |
de194d85 | 605 | is the same as the normal lazy PLT. Subsequent entries for an |
ee2fdd6f L |
606 | x32 IBT-enabled lazy procedure linkage table look like this. */ |
607 | ||
608 | static const bfd_byte elf_x32_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
609 | { | |
07d6d2b8 AM |
610 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
611 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
612 | 0xe9, 0, 0, 0, 0, /* jmpq relative */ | |
613 | 0x66, 0x90 /* xchg %ax,%ax */ | |
ee2fdd6f L |
614 | }; |
615 | ||
38b12349 | 616 | /* Entries in the non-lazey procedure linkage table look like this. */ |
0ff2b86e | 617 | |
38b12349 | 618 | static const bfd_byte elf_x86_64_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 619 | { |
07d6d2b8 AM |
620 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
621 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
622 | 0x66, 0x90 /* xchg %ax,%ax */ | |
0ff2b86e L |
623 | }; |
624 | ||
38b12349 L |
625 | /* Entries for branches with BND prefix in the non-lazey procedure |
626 | linkage table look like this. */ | |
0ff2b86e | 627 | |
38b12349 | 628 | static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 629 | { |
07d6d2b8 AM |
630 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ |
631 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
632 | 0x90 /* nop */ | |
0ff2b86e L |
633 | }; |
634 | ||
ee2fdd6f L |
635 | /* Entries for branches with IBT-enabled in the non-lazey procedure |
636 | linkage table look like this. They have the same size as the lazy | |
637 | PLT entry. */ | |
638 | ||
639 | static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
640 | { | |
07d6d2b8 AM |
641 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
642 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ | |
ee2fdd6f | 643 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
07d6d2b8 | 644 | 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */ |
ee2fdd6f L |
645 | }; |
646 | ||
647 | /* Entries for branches with IBT-enabled in the x32 non-lazey procedure | |
648 | linkage table look like this. They have the same size as the lazy | |
649 | PLT entry. */ | |
650 | ||
651 | static const bfd_byte elf_x32_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
652 | { | |
07d6d2b8 AM |
653 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ |
654 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ | |
ee2fdd6f L |
655 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
656 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
657 | }; | |
658 | ||
38b12349 | 659 | /* .eh_frame covering the lazy .plt section. */ |
e41b3a13 | 660 | |
38b12349 | 661 | static const bfd_byte elf_x86_64_eh_frame_lazy_plt[] = |
e41b3a13 | 662 | { |
e41b3a13 JJ |
663 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ |
664 | 0, 0, 0, 0, /* CIE ID */ | |
665 | 1, /* CIE version */ | |
666 | 'z', 'R', 0, /* Augmentation string */ | |
667 | 1, /* Code alignment factor */ | |
668 | 0x78, /* Data alignment factor */ | |
669 | 16, /* Return address column */ | |
670 | 1, /* Augmentation size */ | |
671 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
672 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
673 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
674 | DW_CFA_nop, DW_CFA_nop, | |
675 | ||
676 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
677 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
678 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
679 | 0, 0, 0, 0, /* .plt size goes here */ | |
680 | 0, /* Augmentation size */ | |
681 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
682 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
683 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
684 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
685 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
686 | 11, /* Block length */ | |
687 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
688 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
689 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
690 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
691 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
692 | }; | |
693 | ||
38b12349 | 694 | /* .eh_frame covering the lazy BND .plt section. */ |
9e659176 | 695 | |
38b12349 | 696 | static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt[] = |
9e659176 L |
697 | { |
698 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
699 | 0, 0, 0, 0, /* CIE ID */ | |
700 | 1, /* CIE version */ | |
701 | 'z', 'R', 0, /* Augmentation string */ | |
702 | 1, /* Code alignment factor */ | |
703 | 0x78, /* Data alignment factor */ | |
704 | 16, /* Return address column */ | |
705 | 1, /* Augmentation size */ | |
706 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
707 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
708 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
709 | DW_CFA_nop, DW_CFA_nop, | |
710 | ||
711 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
712 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
713 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
714 | 0, 0, 0, 0, /* .plt size goes here */ | |
715 | 0, /* Augmentation size */ | |
716 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
717 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
718 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
719 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
720 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
721 | 11, /* Block length */ | |
722 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
723 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
724 | DW_OP_lit15, DW_OP_and, DW_OP_lit5, DW_OP_ge, | |
725 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
726 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
727 | }; | |
728 | ||
ee2fdd6f L |
729 | /* .eh_frame covering the lazy .plt section with IBT-enabled. */ |
730 | ||
731 | static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt[] = | |
732 | { | |
733 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
734 | 0, 0, 0, 0, /* CIE ID */ | |
735 | 1, /* CIE version */ | |
736 | 'z', 'R', 0, /* Augmentation string */ | |
737 | 1, /* Code alignment factor */ | |
738 | 0x78, /* Data alignment factor */ | |
739 | 16, /* Return address column */ | |
740 | 1, /* Augmentation size */ | |
741 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
742 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
743 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
744 | DW_CFA_nop, DW_CFA_nop, | |
745 | ||
746 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
747 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
748 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
749 | 0, 0, 0, 0, /* .plt size goes here */ | |
750 | 0, /* Augmentation size */ | |
751 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
752 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
753 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
754 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
755 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
756 | 11, /* Block length */ | |
757 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
758 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
759 | DW_OP_lit15, DW_OP_and, DW_OP_lit10, DW_OP_ge, | |
760 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
761 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
762 | }; | |
763 | ||
764 | /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */ | |
765 | ||
766 | static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt[] = | |
767 | { | |
768 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
769 | 0, 0, 0, 0, /* CIE ID */ | |
770 | 1, /* CIE version */ | |
771 | 'z', 'R', 0, /* Augmentation string */ | |
772 | 1, /* Code alignment factor */ | |
773 | 0x78, /* Data alignment factor */ | |
774 | 16, /* Return address column */ | |
775 | 1, /* Augmentation size */ | |
776 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
777 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
778 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
779 | DW_CFA_nop, DW_CFA_nop, | |
780 | ||
781 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
782 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
783 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
784 | 0, 0, 0, 0, /* .plt size goes here */ | |
785 | 0, /* Augmentation size */ | |
786 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
787 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
788 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
789 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
790 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
791 | 11, /* Block length */ | |
792 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
793 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
794 | DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge, | |
795 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
796 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
797 | }; | |
798 | ||
38b12349 | 799 | /* .eh_frame covering the non-lazy .plt section. */ |
fff53dae | 800 | |
38b12349 | 801 | static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt[] = |
fff53dae L |
802 | { |
803 | #define PLT_GOT_FDE_LENGTH 20 | |
804 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
805 | 0, 0, 0, 0, /* CIE ID */ | |
806 | 1, /* CIE version */ | |
807 | 'z', 'R', 0, /* Augmentation string */ | |
808 | 1, /* Code alignment factor */ | |
809 | 0x78, /* Data alignment factor */ | |
810 | 16, /* Return address column */ | |
811 | 1, /* Augmentation size */ | |
812 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
813 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
814 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
815 | DW_CFA_nop, DW_CFA_nop, | |
816 | ||
817 | PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
818 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
38b12349 L |
819 | 0, 0, 0, 0, /* the start of non-lazy .plt goes here */ |
820 | 0, 0, 0, 0, /* non-lazy .plt size goes here */ | |
fff53dae L |
821 | 0, /* Augmentation size */ |
822 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, | |
823 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
824 | }; | |
825 | ||
eed180f8 | 826 | /* These are the standard parameters. */ |
765e526c | 827 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt = |
eed180f8 | 828 | { |
07d6d2b8 AM |
829 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ |
830 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
831 | elf_x86_64_lazy_plt_entry, /* plt_entry */ | |
832 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
833 | 2, /* plt0_got1_offset */ | |
834 | 8, /* plt0_got2_offset */ | |
835 | 12, /* plt0_got2_insn_end */ | |
836 | 2, /* plt_got_offset */ | |
837 | 7, /* plt_reloc_offset */ | |
838 | 12, /* plt_plt_offset */ | |
839 | 6, /* plt_got_insn_size */ | |
840 | LAZY_PLT_ENTRY_SIZE, /* plt_plt_insn_end */ | |
841 | 6, /* plt_lazy_offset */ | |
842 | elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */ | |
843 | elf_x86_64_lazy_plt_entry, /* pic_plt_entry */ | |
844 | elf_x86_64_eh_frame_lazy_plt, /* eh_frame_plt */ | |
38b12349 L |
845 | sizeof (elf_x86_64_eh_frame_lazy_plt) /* eh_frame_plt_size */ |
846 | }; | |
847 | ||
765e526c | 848 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_plt = |
38b12349 | 849 | { |
07d6d2b8 AM |
850 | elf_x86_64_non_lazy_plt_entry, /* plt_entry */ |
851 | elf_x86_64_non_lazy_plt_entry, /* pic_plt_entry */ | |
852 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
853 | 2, /* plt_got_offset */ | |
854 | 6, /* plt_got_insn_size */ | |
855 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
38b12349 | 856 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
eed180f8 RM |
857 | }; |
858 | ||
765e526c | 859 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_bnd_plt = |
0ff2b86e | 860 | { |
07d6d2b8 AM |
861 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ |
862 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
863 | elf_x86_64_lazy_bnd_plt_entry, /* plt_entry */ | |
864 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
865 | 2, /* plt0_got1_offset */ | |
866 | 1+8, /* plt0_got2_offset */ | |
867 | 1+12, /* plt0_got2_insn_end */ | |
868 | 1+2, /* plt_got_offset */ | |
869 | 1, /* plt_reloc_offset */ | |
870 | 7, /* plt_plt_offset */ | |
871 | 1+6, /* plt_got_insn_size */ | |
872 | 11, /* plt_plt_insn_end */ | |
873 | 0, /* plt_lazy_offset */ | |
874 | elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */ | |
875 | elf_x86_64_lazy_bnd_plt_entry, /* pic_plt_entry */ | |
876 | elf_x86_64_eh_frame_lazy_bnd_plt, /* eh_frame_plt */ | |
38b12349 L |
877 | sizeof (elf_x86_64_eh_frame_lazy_bnd_plt) /* eh_frame_plt_size */ |
878 | }; | |
879 | ||
765e526c | 880 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt = |
38b12349 | 881 | { |
07d6d2b8 AM |
882 | elf_x86_64_non_lazy_bnd_plt_entry, /* plt_entry */ |
883 | elf_x86_64_non_lazy_bnd_plt_entry, /* pic_plt_entry */ | |
884 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
885 | 1+2, /* plt_got_offset */ | |
886 | 1+6, /* plt_got_insn_size */ | |
887 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
38b12349 L |
888 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
889 | }; | |
890 | ||
765e526c | 891 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt = |
ee2fdd6f | 892 | { |
07d6d2b8 AM |
893 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ |
894 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
895 | elf_x86_64_lazy_ibt_plt_entry, /* plt_entry */ | |
896 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
897 | 2, /* plt0_got1_offset */ | |
898 | 1+8, /* plt0_got2_offset */ | |
899 | 1+12, /* plt0_got2_insn_end */ | |
900 | 4+1+2, /* plt_got_offset */ | |
901 | 4+1, /* plt_reloc_offset */ | |
902 | 4+1+6, /* plt_plt_offset */ | |
903 | 4+1+6, /* plt_got_insn_size */ | |
904 | 4+1+5+5, /* plt_plt_insn_end */ | |
905 | 0, /* plt_lazy_offset */ | |
906 | elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */ | |
907 | elf_x86_64_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
908 | elf_x86_64_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
909 | sizeof (elf_x86_64_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ |
910 | }; | |
911 | ||
765e526c | 912 | static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt = |
ee2fdd6f | 913 | { |
07d6d2b8 AM |
914 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ |
915 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
916 | elf_x32_lazy_ibt_plt_entry, /* plt_entry */ | |
917 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
918 | 2, /* plt0_got1_offset */ | |
919 | 8, /* plt0_got2_offset */ | |
920 | 12, /* plt0_got2_insn_end */ | |
921 | 4+2, /* plt_got_offset */ | |
922 | 4+1, /* plt_reloc_offset */ | |
923 | 4+6, /* plt_plt_offset */ | |
924 | 4+6, /* plt_got_insn_size */ | |
925 | 4+5+5, /* plt_plt_insn_end */ | |
926 | 0, /* plt_lazy_offset */ | |
927 | elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */ | |
928 | elf_x32_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
929 | elf_x32_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
930 | sizeof (elf_x32_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ |
931 | }; | |
932 | ||
765e526c | 933 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt = |
ee2fdd6f | 934 | { |
07d6d2b8 AM |
935 | elf_x86_64_non_lazy_ibt_plt_entry, /* plt_entry */ |
936 | elf_x86_64_non_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
937 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
938 | 4+1+2, /* plt_got_offset */ | |
939 | 4+1+6, /* plt_got_insn_size */ | |
940 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
941 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
942 | }; | |
943 | ||
765e526c | 944 | static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt = |
ee2fdd6f | 945 | { |
07d6d2b8 AM |
946 | elf_x32_non_lazy_ibt_plt_entry, /* plt_entry */ |
947 | elf_x32_non_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
948 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
949 | 4+2, /* plt_got_offset */ | |
950 | 4+6, /* plt_got_insn_size */ | |
951 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
952 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
953 | }; | |
954 | ||
851b6fa1 | 955 | static const struct elf_x86_backend_data elf_x86_64_arch_bed = |
38b12349 | 956 | { |
07d6d2b8 | 957 | is_normal /* os */ |
0ff2b86e L |
958 | }; |
959 | ||
eed180f8 RM |
960 | #define elf_backend_arch_data &elf_x86_64_arch_bed |
961 | ||
b34976b6 | 962 | static bfd_boolean |
27482721 | 963 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 964 | { |
8d88c4ca NC |
965 | /* Set the right machine number for an x86-64 elf64 file. */ |
966 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 967 | return TRUE; |
8d88c4ca NC |
968 | } |
969 | ||
8059fb19 RM |
970 | static bfd_boolean |
971 | elf32_x86_64_elf_object_p (bfd *abfd) | |
972 | { | |
973 | /* Set the right machine number for an x86-64 elf32 file. */ | |
974 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
975 | return TRUE; | |
976 | } | |
977 | ||
142411ca L |
978 | /* Return TRUE if the TLS access code sequence support transition |
979 | from R_TYPE. */ | |
980 | ||
981 | static bfd_boolean | |
351f65ca L |
982 | elf_x86_64_check_tls_transition (bfd *abfd, |
983 | struct bfd_link_info *info, | |
984 | asection *sec, | |
985 | bfd_byte *contents, | |
986 | Elf_Internal_Shdr *symtab_hdr, | |
987 | struct elf_link_hash_entry **sym_hashes, | |
988 | unsigned int r_type, | |
989 | const Elf_Internal_Rela *rel, | |
990 | const Elf_Internal_Rela *relend) | |
bffbf940 | 991 | { |
142411ca L |
992 | unsigned int val; |
993 | unsigned long r_symndx; | |
5c98a14e | 994 | bfd_boolean largepic = FALSE; |
142411ca L |
995 | struct elf_link_hash_entry *h; |
996 | bfd_vma offset; | |
0afcef53 | 997 | struct elf_x86_link_hash_table *htab; |
e2cbcd91 | 998 | bfd_byte *call; |
1d4af308 | 999 | bfd_boolean indirect_call; |
142411ca | 1000 | |
0afcef53 | 1001 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
142411ca | 1002 | offset = rel->r_offset; |
bffbf940 | 1003 | switch (r_type) |
142411ca L |
1004 | { |
1005 | case R_X86_64_TLSGD: | |
1006 | case R_X86_64_TLSLD: | |
1007 | if ((rel + 1) >= relend) | |
1008 | return FALSE; | |
1009 | ||
1010 | if (r_type == R_X86_64_TLSGD) | |
1011 | { | |
52bc799a | 1012 | /* Check transition from GD access model. For 64bit, only |
142411ca | 1013 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
e2cbcd91 L |
1014 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1015 | or | |
1016 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
1017 | .byte 0x66; rex64 | |
1018 | call *__tls_get_addr@GOTPCREL(%rip) | |
1019 | which may be converted to | |
1020 | addr32 call __tls_get_addr | |
52bc799a L |
1021 | can transit to different access model. For 32bit, only |
1022 | leaq foo@tlsgd(%rip), %rdi | |
e2cbcd91 L |
1023 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1024 | or | |
1025 | leaq foo@tlsgd(%rip), %rdi | |
1026 | .byte 0x66; rex64 | |
1027 | call *__tls_get_addr@GOTPCREL(%rip) | |
1028 | which may be converted to | |
1029 | addr32 call __tls_get_addr | |
1030 | can transit to different access model. For largepic, | |
5c98a14e | 1031 | we also support: |
07d6d2b8 AM |
1032 | leaq foo@tlsgd(%rip), %rdi |
1033 | movabsq $__tls_get_addr@pltoff, %rax | |
1034 | addq $r15, %rax | |
1035 | call *%rax | |
e2cbcd91 | 1036 | or |
07d6d2b8 AM |
1037 | leaq foo@tlsgd(%rip), %rdi |
1038 | movabsq $__tls_get_addr@pltoff, %rax | |
1039 | addq $rbx, %rax | |
1040 | call *%rax */ | |
142411ca | 1041 | |
fa289a5f AM |
1042 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; |
1043 | ||
5c98a14e | 1044 | if ((offset + 12) > sec->size) |
142411ca | 1045 | return FALSE; |
52bc799a | 1046 | |
e2cbcd91 L |
1047 | call = contents + offset + 4; |
1048 | if (call[0] != 0x66 | |
1049 | || !((call[1] == 0x48 | |
1050 | && call[2] == 0xff | |
1051 | && call[3] == 0x15) | |
1052 | || (call[1] == 0x48 | |
1053 | && call[2] == 0x67 | |
1054 | && call[3] == 0xe8) | |
1055 | || (call[1] == 0x66 | |
1056 | && call[2] == 0x48 | |
1057 | && call[3] == 0xe8))) | |
5c98a14e JJ |
1058 | { |
1059 | if (!ABI_64_P (abfd) | |
1060 | || (offset + 19) > sec->size | |
1061 | || offset < 3 | |
e2cbcd91 L |
1062 | || memcmp (call - 7, leaq + 1, 3) != 0 |
1063 | || memcmp (call, "\x48\xb8", 2) != 0 | |
1064 | || call[11] != 0x01 | |
1065 | || call[13] != 0xff | |
1066 | || call[14] != 0xd0 | |
1067 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1068 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1069 | return FALSE; |
1070 | largepic = TRUE; | |
1071 | } | |
1072 | else if (ABI_64_P (abfd)) | |
52bc799a | 1073 | { |
52bc799a | 1074 | if (offset < 4 |
fa289a5f | 1075 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1076 | return FALSE; |
1077 | } | |
1078 | else | |
1079 | { | |
52bc799a | 1080 | if (offset < 3 |
fa289a5f | 1081 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1082 | return FALSE; |
1083 | } | |
e2cbcd91 | 1084 | indirect_call = call[2] == 0xff; |
142411ca L |
1085 | } |
1086 | else | |
1087 | { | |
1088 | /* Check transition from LD access model. Only | |
1089 | leaq foo@tlsld(%rip), %rdi; | |
e2cbcd91 | 1090 | call __tls_get_addr@PLT |
07d6d2b8 | 1091 | or |
e2cbcd91 L |
1092 | leaq foo@tlsld(%rip), %rdi; |
1093 | call *__tls_get_addr@GOTPCREL(%rip) | |
1094 | which may be converted to | |
1095 | addr32 call __tls_get_addr | |
5c98a14e JJ |
1096 | can transit to different access model. For largepic |
1097 | we also support: | |
07d6d2b8 AM |
1098 | leaq foo@tlsld(%rip), %rdi |
1099 | movabsq $__tls_get_addr@pltoff, %rax | |
1100 | addq $r15, %rax | |
1101 | call *%rax | |
e2cbcd91 | 1102 | or |
07d6d2b8 AM |
1103 | leaq foo@tlsld(%rip), %rdi |
1104 | movabsq $__tls_get_addr@pltoff, %rax | |
1105 | addq $rbx, %rax | |
1106 | call *%rax */ | |
142411ca | 1107 | |
fa289a5f | 1108 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1109 | |
1110 | if (offset < 3 || (offset + 9) > sec->size) | |
1111 | return FALSE; | |
1112 | ||
5c98a14e | 1113 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
142411ca | 1114 | return FALSE; |
5c98a14e | 1115 | |
e2cbcd91 L |
1116 | call = contents + offset + 4; |
1117 | if (!(call[0] == 0xe8 | |
1118 | || (call[0] == 0xff && call[1] == 0x15) | |
1119 | || (call[0] == 0x67 && call[1] == 0xe8))) | |
5c98a14e JJ |
1120 | { |
1121 | if (!ABI_64_P (abfd) | |
1122 | || (offset + 19) > sec->size | |
e2cbcd91 L |
1123 | || memcmp (call, "\x48\xb8", 2) != 0 |
1124 | || call[11] != 0x01 | |
1125 | || call[13] != 0xff | |
1126 | || call[14] != 0xd0 | |
1127 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1128 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1129 | return FALSE; |
1130 | largepic = TRUE; | |
1131 | } | |
e2cbcd91 | 1132 | indirect_call = call[0] == 0xff; |
142411ca L |
1133 | } |
1134 | ||
351f65ca | 1135 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1136 | if (r_symndx < symtab_hdr->sh_info) |
1137 | return FALSE; | |
1138 | ||
1139 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1d4af308 | 1140 | if (h == NULL |
0afcef53 | 1141 | || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr) |
e2cbcd91 | 1142 | return FALSE; |
e2cbcd91 | 1143 | else |
78984959 L |
1144 | { |
1145 | r_type = (ELF32_R_TYPE (rel[1].r_info) | |
1146 | & ~R_X86_64_converted_reloc_bit); | |
1147 | if (largepic) | |
1148 | return r_type == R_X86_64_PLTOFF64; | |
1149 | else if (indirect_call) | |
1150 | return r_type == R_X86_64_GOTPCRELX; | |
1151 | else | |
1152 | return (r_type == R_X86_64_PC32 || r_type == R_X86_64_PLT32); | |
1153 | } | |
142411ca L |
1154 | |
1155 | case R_X86_64_GOTTPOFF: | |
1156 | /* Check transition from IE access model: | |
4a4c5f25 L |
1157 | mov foo@gottpoff(%rip), %reg |
1158 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1159 | */ |
1160 | ||
4a4c5f25 L |
1161 | /* Check REX prefix first. */ |
1162 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1163 | { | |
1164 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1165 | if (val != 0x48 && val != 0x4c) | |
1166 | { | |
1167 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1168 | if (ABI_64_P (abfd)) | |
1169 | return FALSE; | |
1170 | } | |
1171 | } | |
1172 | else | |
1173 | { | |
1174 | /* X32 may not have any REX prefix. */ | |
1175 | if (ABI_64_P (abfd)) | |
1176 | return FALSE; | |
1177 | if (offset < 2 || (offset + 3) > sec->size) | |
1178 | return FALSE; | |
1179 | } | |
142411ca L |
1180 | |
1181 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1182 | if (val != 0x8b && val != 0x03) | |
1183 | return FALSE; | |
1184 | ||
1185 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1186 | return (val & 0xc7) == 5; | |
1187 | ||
1188 | case R_X86_64_GOTPC32_TLSDESC: | |
1189 | /* Check transition from GDesc access model: | |
1190 | leaq x@tlsdesc(%rip), %rax | |
1191 | ||
1192 | Make sure it's a leaq adding rip to a 32-bit offset | |
1193 | into any register, although it's probably almost always | |
1194 | going to be rax. */ | |
1195 | ||
1196 | if (offset < 3 || (offset + 4) > sec->size) | |
1197 | return FALSE; | |
1198 | ||
1199 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1200 | if ((val & 0xfb) != 0x48) | |
1201 | return FALSE; | |
1202 | ||
1203 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1204 | return FALSE; | |
1205 | ||
1206 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1207 | return (val & 0xc7) == 0x05; | |
1208 | ||
1209 | case R_X86_64_TLSDESC_CALL: | |
1210 | /* Check transition from GDesc access model: | |
1211 | call *x@tlsdesc(%rax) | |
1212 | */ | |
1213 | if (offset + 2 <= sec->size) | |
1214 | { | |
1215 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
e2cbcd91 L |
1216 | call = contents + offset; |
1217 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1218 | } |
1219 | ||
1220 | return FALSE; | |
1221 | ||
1222 | default: | |
1223 | abort (); | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | /* Return TRUE if the TLS access transition is OK or no transition | |
1228 | will be performed. Update R_TYPE if there is a transition. */ | |
1229 | ||
1230 | static bfd_boolean | |
351f65ca L |
1231 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1232 | asection *sec, bfd_byte *contents, | |
1233 | Elf_Internal_Shdr *symtab_hdr, | |
1234 | struct elf_link_hash_entry **sym_hashes, | |
1235 | unsigned int *r_type, int tls_type, | |
1236 | const Elf_Internal_Rela *rel, | |
1237 | const Elf_Internal_Rela *relend, | |
1238 | struct elf_link_hash_entry *h, | |
bedfd056 L |
1239 | unsigned long r_symndx, |
1240 | bfd_boolean from_relocate_section) | |
142411ca L |
1241 | { |
1242 | unsigned int from_type = *r_type; | |
1243 | unsigned int to_type = from_type; | |
1244 | bfd_boolean check = TRUE; | |
1245 | ||
bb1cb422 L |
1246 | /* Skip TLS transition for functions. */ |
1247 | if (h != NULL | |
1248 | && (h->type == STT_FUNC | |
1249 | || h->type == STT_GNU_IFUNC)) | |
1250 | return TRUE; | |
1251 | ||
142411ca | 1252 | switch (from_type) |
bffbf940 JJ |
1253 | { |
1254 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1255 | case R_X86_64_GOTPC32_TLSDESC: |
1256 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1257 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1258 | if (bfd_link_executable (info)) |
142411ca L |
1259 | { |
1260 | if (h == NULL) | |
1261 | to_type = R_X86_64_TPOFF32; | |
1262 | else | |
1263 | to_type = R_X86_64_GOTTPOFF; | |
1264 | } | |
1265 | ||
bedfd056 L |
1266 | /* When we are called from elf_x86_64_relocate_section, there may |
1267 | be additional transitions based on TLS_TYPE. */ | |
1268 | if (from_relocate_section) | |
142411ca L |
1269 | { |
1270 | unsigned int new_to_type = to_type; | |
1271 | ||
51537393 | 1272 | if (TLS_TRANSITION_IE_TO_LE_P (info, h, tls_type)) |
142411ca L |
1273 | new_to_type = R_X86_64_TPOFF32; |
1274 | ||
1275 | if (to_type == R_X86_64_TLSGD | |
1276 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1277 | || to_type == R_X86_64_TLSDESC_CALL) | |
1278 | { | |
1279 | if (tls_type == GOT_TLS_IE) | |
1280 | new_to_type = R_X86_64_GOTTPOFF; | |
1281 | } | |
1282 | ||
1283 | /* We checked the transition before when we were called from | |
351f65ca | 1284 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1285 | transition which hasn't been checked before. */ |
1286 | check = new_to_type != to_type && from_type == to_type; | |
1287 | to_type = new_to_type; | |
1288 | } | |
1289 | ||
1290 | break; | |
1291 | ||
bffbf940 | 1292 | case R_X86_64_TLSLD: |
0e1862bb | 1293 | if (bfd_link_executable (info)) |
142411ca L |
1294 | to_type = R_X86_64_TPOFF32; |
1295 | break; | |
1296 | ||
1297 | default: | |
1298 | return TRUE; | |
bffbf940 JJ |
1299 | } |
1300 | ||
142411ca L |
1301 | /* Return TRUE if there is no transition. */ |
1302 | if (from_type == to_type) | |
1303 | return TRUE; | |
1304 | ||
1305 | /* Check if the transition can be performed. */ | |
1306 | if (check | |
351f65ca L |
1307 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1308 | symtab_hdr, sym_hashes, | |
1309 | from_type, rel, relend)) | |
142411ca | 1310 | { |
2f629d23 | 1311 | reloc_howto_type *from, *to; |
4c544807 | 1312 | const char *name; |
142411ca | 1313 | |
351f65ca L |
1314 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1315 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1316 | |
f3185997 NC |
1317 | if (from == NULL || to == NULL) |
1318 | return FALSE; | |
1319 | ||
4c544807 L |
1320 | if (h) |
1321 | name = h->root.root.string; | |
1322 | else | |
1323 | { | |
0afcef53 | 1324 | struct elf_x86_link_hash_table *htab; |
4dfe6ac6 | 1325 | |
0afcef53 | 1326 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
1327 | if (htab == NULL) |
1328 | name = "*unknown*"; | |
1329 | else | |
1330 | { | |
1331 | Elf_Internal_Sym *isym; | |
1332 | ||
1333 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1334 | abfd, r_symndx); | |
1335 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1336 | } | |
4c544807 L |
1337 | } |
1338 | ||
4eca0228 | 1339 | _bfd_error_handler |
695344c0 | 1340 | /* xgettext:c-format */ |
2dcf00ce AM |
1341 | (_("%pB: TLS transition from %s to %s against `%s' at %#" PRIx64 |
1342 | " in section `%pA' failed"), | |
1343 | abfd, from->name, to->name, name, (uint64_t) rel->r_offset, sec); | |
142411ca L |
1344 | bfd_set_error (bfd_error_bad_value); |
1345 | return FALSE; | |
1346 | } | |
1347 | ||
1348 | *r_type = to_type; | |
1349 | return TRUE; | |
bffbf940 JJ |
1350 | } |
1351 | ||
c1d11331 L |
1352 | /* Rename some of the generic section flags to better document how they |
1353 | are used here. */ | |
6999821f | 1354 | #define check_relocs_failed sec_flg0 |
338c190a L |
1355 | |
1356 | static bfd_boolean | |
aab921ad L |
1357 | elf_x86_64_need_pic (struct bfd_link_info *info, |
1358 | bfd *input_bfd, asection *sec, | |
338c190a L |
1359 | struct elf_link_hash_entry *h, |
1360 | Elf_Internal_Shdr *symtab_hdr, | |
1361 | Elf_Internal_Sym *isym, | |
1362 | reloc_howto_type *howto) | |
1363 | { | |
1364 | const char *v = ""; | |
1365 | const char *und = ""; | |
1366 | const char *pic = ""; | |
aab921ad | 1367 | const char *object; |
338c190a L |
1368 | |
1369 | const char *name; | |
1370 | if (h) | |
1371 | { | |
1372 | name = h->root.root.string; | |
1373 | switch (ELF_ST_VISIBILITY (h->other)) | |
1374 | { | |
1375 | case STV_HIDDEN: | |
1376 | v = _("hidden symbol "); | |
1377 | break; | |
1378 | case STV_INTERNAL: | |
1379 | v = _("internal symbol "); | |
1380 | break; | |
1381 | case STV_PROTECTED: | |
1382 | v = _("protected symbol "); | |
1383 | break; | |
1384 | default: | |
0afcef53 | 1385 | if (((struct elf_x86_link_hash_entry *) h)->def_protected) |
a5b4ee94 L |
1386 | v = _("protected symbol "); |
1387 | else | |
1388 | v = _("symbol "); | |
338c190a L |
1389 | pic = _("; recompile with -fPIC"); |
1390 | break; | |
1391 | } | |
1392 | ||
1393 | if (!h->def_regular && !h->def_dynamic) | |
1394 | und = _("undefined "); | |
1395 | } | |
1396 | else | |
1397 | { | |
1398 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL); | |
1399 | pic = _("; recompile with -fPIC"); | |
1400 | } | |
1401 | ||
aab921ad L |
1402 | if (bfd_link_dll (info)) |
1403 | object = _("a shared object"); | |
1404 | else if (bfd_link_pie (info)) | |
1405 | object = _("a PIE object"); | |
1406 | else | |
1407 | object = _("a PDE object"); | |
1408 | ||
695344c0 | 1409 | /* xgettext:c-format */ |
871b3ab2 | 1410 | _bfd_error_handler (_("%pB: relocation %s against %s%s`%s' can " |
aab921ad L |
1411 | "not be used when making %s%s"), |
1412 | input_bfd, howto->name, und, v, name, | |
1413 | object, pic); | |
338c190a L |
1414 | bfd_set_error (bfd_error_bad_value); |
1415 | sec->check_relocs_failed = 1; | |
1416 | return FALSE; | |
1417 | } | |
c1d11331 | 1418 | |
c175a657 L |
1419 | /* With the local symbol, foo, we convert |
1420 | mov foo@GOTPCREL(%rip), %reg | |
1421 | to | |
1422 | lea foo(%rip), %reg | |
1423 | and convert | |
1424 | call/jmp *foo@GOTPCREL(%rip) | |
1425 | to | |
1426 | nop call foo/jmp foo nop | |
1427 | When PIC is false, convert | |
1428 | test %reg, foo@GOTPCREL(%rip) | |
1429 | to | |
1430 | test $foo, %reg | |
1431 | and convert | |
1432 | binop foo@GOTPCREL(%rip), %reg | |
1433 | to | |
1434 | binop $foo, %reg | |
1435 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1436 | instructions. */ | |
1437 | ||
1438 | static bfd_boolean | |
8b43e456 | 1439 | elf_x86_64_convert_load_reloc (bfd *abfd, |
c175a657 | 1440 | bfd_byte *contents, |
6999821f | 1441 | unsigned int *r_type_p, |
c175a657 L |
1442 | Elf_Internal_Rela *irel, |
1443 | struct elf_link_hash_entry *h, | |
1444 | bfd_boolean *converted, | |
1445 | struct bfd_link_info *link_info) | |
1446 | { | |
0afcef53 | 1447 | struct elf_x86_link_hash_table *htab; |
c175a657 | 1448 | bfd_boolean is_pic; |
8b43e456 | 1449 | bfd_boolean no_overflow; |
c175a657 L |
1450 | bfd_boolean relocx; |
1451 | bfd_boolean to_reloc_pc32; | |
1452 | asection *tsec; | |
c175a657 L |
1453 | bfd_signed_vma raddend; |
1454 | unsigned int opcode; | |
1455 | unsigned int modrm; | |
6999821f | 1456 | unsigned int r_type = *r_type_p; |
c175a657 | 1457 | unsigned int r_symndx; |
c175a657 L |
1458 | bfd_vma roff = irel->r_offset; |
1459 | ||
1460 | if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2)) | |
1461 | return TRUE; | |
1462 | ||
1463 | raddend = irel->r_addend; | |
1464 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
1465 | if (raddend != -4) | |
1466 | return TRUE; | |
1467 | ||
0afcef53 | 1468 | htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA); |
c175a657 L |
1469 | is_pic = bfd_link_pic (link_info); |
1470 | ||
1471 | relocx = (r_type == R_X86_64_GOTPCRELX | |
1472 | || r_type == R_X86_64_REX_GOTPCRELX); | |
1473 | ||
8b43e456 L |
1474 | /* TRUE if --no-relax is used. */ |
1475 | no_overflow = link_info->disable_target_specific_optimizations > 1; | |
c175a657 L |
1476 | |
1477 | r_symndx = htab->r_sym (irel->r_info); | |
1478 | ||
1479 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1480 | ||
1481 | /* Convert mov to lea since it has been done for a while. */ | |
1482 | if (opcode != 0x8b) | |
1483 | { | |
1484 | /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX | |
1485 | for call, jmp or one of adc, add, and, cmp, or, sbb, sub, | |
1486 | test, xor instructions. */ | |
1487 | if (!relocx) | |
1488 | return TRUE; | |
1489 | } | |
1490 | ||
1491 | /* We convert only to R_X86_64_PC32: | |
1492 | 1. Branch. | |
1493 | 2. R_X86_64_GOTPCREL since we can't modify REX byte. | |
8b43e456 | 1494 | 3. no_overflow is true. |
c175a657 L |
1495 | 4. PIC. |
1496 | */ | |
1497 | to_reloc_pc32 = (opcode == 0xff | |
1498 | || !relocx | |
8b43e456 | 1499 | || no_overflow |
c175a657 L |
1500 | || is_pic); |
1501 | ||
1502 | /* Get the symbol referred to by the reloc. */ | |
1503 | if (h == NULL) | |
1504 | { | |
1505 | Elf_Internal_Sym *isym | |
1506 | = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx); | |
1507 | ||
1508 | /* Skip relocation against undefined symbols. */ | |
1509 | if (isym->st_shndx == SHN_UNDEF) | |
1510 | return TRUE; | |
1511 | ||
c175a657 L |
1512 | if (isym->st_shndx == SHN_ABS) |
1513 | tsec = bfd_abs_section_ptr; | |
1514 | else if (isym->st_shndx == SHN_COMMON) | |
1515 | tsec = bfd_com_section_ptr; | |
1516 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
1517 | tsec = &_bfd_elf_large_com_section; | |
1518 | else | |
1519 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c175a657 L |
1520 | } |
1521 | else | |
1522 | { | |
1523 | /* Undefined weak symbol is only bound locally in executable | |
1524 | and its reference is resolved as 0 without relocation | |
1525 | overflow. We can only perform this optimization for | |
1526 | GOTPCRELX relocations since we need to modify REX byte. | |
1527 | It is OK convert mov with R_X86_64_GOTPCREL to | |
1528 | R_X86_64_PC32. */ | |
0a27fed7 L |
1529 | bfd_boolean local_ref; |
1530 | struct elf_x86_link_hash_entry *eh = elf_x86_hash_entry (h); | |
1531 | ||
1532 | /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */ | |
1533 | local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h); | |
c175a657 | 1534 | if ((relocx || opcode == 0x8b) |
0a27fed7 L |
1535 | && (h->root.type == bfd_link_hash_undefweak |
1536 | && !eh->linker_def | |
1537 | && local_ref)) | |
c175a657 L |
1538 | { |
1539 | if (opcode == 0xff) | |
1540 | { | |
1541 | /* Skip for branch instructions since R_X86_64_PC32 | |
1542 | may overflow. */ | |
8b43e456 | 1543 | if (no_overflow) |
c175a657 L |
1544 | return TRUE; |
1545 | } | |
1546 | else if (relocx) | |
1547 | { | |
1548 | /* For non-branch instructions, we can convert to | |
1549 | R_X86_64_32/R_X86_64_32S since we know if there | |
1550 | is a REX byte. */ | |
1551 | to_reloc_pc32 = FALSE; | |
1552 | } | |
1553 | ||
1554 | /* Since we don't know the current PC when PIC is true, | |
1555 | we can't convert to R_X86_64_PC32. */ | |
1556 | if (to_reloc_pc32 && is_pic) | |
1557 | return TRUE; | |
1558 | ||
1559 | goto convert; | |
1560 | } | |
1561 | /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since | |
1562 | ld.so may use its link-time address. */ | |
cbd0eecf | 1563 | else if (h->start_stop |
0a27fed7 | 1564 | || eh->linker_def |
cbd0eecf L |
1565 | || ((h->def_regular |
1566 | || h->root.type == bfd_link_hash_defined | |
1567 | || h->root.type == bfd_link_hash_defweak) | |
1568 | && h != htab->elf.hdynamic | |
0a27fed7 | 1569 | && local_ref)) |
c175a657 L |
1570 | { |
1571 | /* bfd_link_hash_new or bfd_link_hash_undefined is | |
1572 | set by an assignment in a linker script in | |
cbd0eecf L |
1573 | bfd_elf_record_link_assignment. start_stop is set |
1574 | on __start_SECNAME/__stop_SECNAME which mark section | |
1575 | SECNAME. */ | |
1576 | if (h->start_stop | |
0a27fed7 | 1577 | || eh->linker_def |
cbd0eecf L |
1578 | || (h->def_regular |
1579 | && (h->root.type == bfd_link_hash_new | |
1580 | || h->root.type == bfd_link_hash_undefined | |
1581 | || ((h->root.type == bfd_link_hash_defined | |
1582 | || h->root.type == bfd_link_hash_defweak) | |
1583 | && h->root.u.def.section == bfd_und_section_ptr)))) | |
c175a657 L |
1584 | { |
1585 | /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */ | |
8b43e456 | 1586 | if (no_overflow) |
c175a657 L |
1587 | return TRUE; |
1588 | goto convert; | |
1589 | } | |
1590 | tsec = h->root.u.def.section; | |
c175a657 L |
1591 | } |
1592 | else | |
1593 | return TRUE; | |
1594 | } | |
1595 | ||
2168b268 L |
1596 | /* Don't convert GOTPCREL relocation against large section. */ |
1597 | if (elf_section_data (tsec) != NULL | |
1598 | && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0) | |
1599 | return TRUE; | |
1600 | ||
8b43e456 L |
1601 | /* Skip since R_X86_64_PC32/R_X86_64_32/R_X86_64_32S may overflow. */ |
1602 | if (no_overflow) | |
1603 | return TRUE; | |
c175a657 | 1604 | |
dc089072 | 1605 | convert: |
c175a657 L |
1606 | if (opcode == 0xff) |
1607 | { | |
1608 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
1609 | unsigned int nop; | |
1610 | unsigned int disp; | |
1611 | bfd_vma nop_offset; | |
1612 | ||
1613 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
1614 | R_X86_64_PC32. */ | |
1615 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1616 | if (modrm == 0x25) | |
1617 | { | |
1618 | /* Convert to "jmp foo nop". */ | |
1619 | modrm = 0xe9; | |
1620 | nop = NOP_OPCODE; | |
1621 | nop_offset = irel->r_offset + 3; | |
1622 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1623 | irel->r_offset -= 1; | |
1624 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1625 | } | |
1626 | else | |
1627 | { | |
0afcef53 L |
1628 | struct elf_x86_link_hash_entry *eh |
1629 | = (struct elf_x86_link_hash_entry *) h; | |
e2cbcd91 | 1630 | |
c175a657 L |
1631 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
1632 | is a nop prefix. */ | |
1633 | modrm = 0xe8; | |
e2cbcd91 L |
1634 | /* To support TLS optimization, always use addr32 prefix for |
1635 | "call *__tls_get_addr@GOTPCREL(%rip)". */ | |
1d4af308 | 1636 | if (eh && eh->tls_get_addr) |
c175a657 | 1637 | { |
e2cbcd91 L |
1638 | nop = 0x67; |
1639 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1640 | } |
1641 | else | |
e2cbcd91 L |
1642 | { |
1643 | nop = link_info->call_nop_byte; | |
1644 | if (link_info->call_nop_as_suffix) | |
1645 | { | |
1646 | nop_offset = irel->r_offset + 3; | |
1647 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1648 | irel->r_offset -= 1; | |
1649 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1650 | } | |
1651 | else | |
1652 | nop_offset = irel->r_offset - 2; | |
1653 | } | |
c175a657 L |
1654 | } |
1655 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1656 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1657 | r_type = R_X86_64_PC32; | |
1658 | } | |
1659 | else | |
1660 | { | |
1661 | unsigned int rex; | |
1662 | unsigned int rex_mask = REX_R; | |
1663 | ||
1664 | if (r_type == R_X86_64_REX_GOTPCRELX) | |
1665 | rex = bfd_get_8 (abfd, contents + roff - 3); | |
1666 | else | |
1667 | rex = 0; | |
1668 | ||
1669 | if (opcode == 0x8b) | |
1670 | { | |
1671 | if (to_reloc_pc32) | |
1672 | { | |
1673 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1674 | "lea foo(%rip), %reg". */ | |
1675 | opcode = 0x8d; | |
1676 | r_type = R_X86_64_PC32; | |
1677 | } | |
1678 | else | |
1679 | { | |
1680 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1681 | "mov $foo, %reg". */ | |
1682 | opcode = 0xc7; | |
1683 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1684 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1685 | if ((rex & REX_W) != 0 | |
1686 | && ABI_64_P (link_info->output_bfd)) | |
1687 | { | |
1688 | /* Keep the REX_W bit in REX byte for LP64. */ | |
1689 | r_type = R_X86_64_32S; | |
1690 | goto rewrite_modrm_rex; | |
1691 | } | |
1692 | else | |
1693 | { | |
1694 | /* If the REX_W bit in REX byte isn't needed, | |
1695 | use R_X86_64_32 and clear the W bit to avoid | |
1696 | sign-extend imm32 to imm64. */ | |
1697 | r_type = R_X86_64_32; | |
1698 | /* Clear the W bit in REX byte. */ | |
1699 | rex_mask |= REX_W; | |
1700 | goto rewrite_modrm_rex; | |
1701 | } | |
1702 | } | |
1703 | } | |
1704 | else | |
1705 | { | |
1706 | /* R_X86_64_PC32 isn't supported. */ | |
1707 | if (to_reloc_pc32) | |
1708 | return TRUE; | |
1709 | ||
1710 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1711 | if (opcode == 0x85) | |
1712 | { | |
1713 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
1714 | "test $foo, %reg". */ | |
1715 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1716 | opcode = 0xf7; | |
1717 | } | |
1718 | else | |
1719 | { | |
1720 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
1721 | "binop $foo, %reg". */ | |
1722 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
1723 | opcode = 0x81; | |
1724 | } | |
1725 | ||
1726 | /* Use R_X86_64_32 with 32-bit operand to avoid relocation | |
1727 | overflow when sign-extending imm32 to imm64. */ | |
1728 | r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32; | |
1729 | ||
1730 | rewrite_modrm_rex: | |
1731 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1732 | ||
1733 | if (rex) | |
1734 | { | |
1735 | /* Move the R bit to the B bit in REX byte. */ | |
1736 | rex = (rex & ~rex_mask) | (rex & REX_R) >> 2; | |
1737 | bfd_put_8 (abfd, rex, contents + roff - 3); | |
1738 | } | |
1739 | ||
1740 | /* No addend for R_X86_64_32/R_X86_64_32S relocations. */ | |
1741 | irel->r_addend = 0; | |
1742 | } | |
1743 | ||
1744 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1745 | } | |
1746 | ||
6999821f | 1747 | *r_type_p = r_type; |
78984959 L |
1748 | irel->r_info = htab->r_info (r_symndx, |
1749 | r_type | R_X86_64_converted_reloc_bit); | |
c175a657 L |
1750 | |
1751 | *converted = TRUE; | |
1752 | ||
1753 | return TRUE; | |
1754 | } | |
1755 | ||
70256ad8 | 1756 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1757 | calculate needed space in the global offset table, procedure |
1758 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1759 | |
b34976b6 | 1760 | static bfd_boolean |
351f65ca L |
1761 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1762 | asection *sec, | |
1763 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1764 | { |
0afcef53 | 1765 | struct elf_x86_link_hash_table *htab; |
70256ad8 AJ |
1766 | Elf_Internal_Shdr *symtab_hdr; |
1767 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1768 | const Elf_Internal_Rela *rel; |
1769 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 1770 | asection *sreloc; |
bedfd056 | 1771 | bfd_byte *contents; |
5e5e02ae | 1772 | bfd_boolean converted; |
70256ad8 | 1773 | |
0e1862bb | 1774 | if (bfd_link_relocatable (info)) |
b34976b6 | 1775 | return TRUE; |
70256ad8 | 1776 | |
081b1afe L |
1777 | /* Don't do anything special with non-loaded, non-alloced sections. |
1778 | In particular, any relocs in such sections should not affect GOT | |
1779 | and PLT reference counting (ie. we don't allow them to create GOT | |
1780 | or PLT entries), there's no possibility or desire to optimize TLS | |
1781 | relocs, and there's not much point in propagating relocs to shared | |
1782 | libs that the dynamic linker won't relocate. */ | |
1783 | if ((sec->flags & SEC_ALLOC) == 0) | |
1784 | return TRUE; | |
1785 | ||
0afcef53 | 1786 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 | 1787 | if (htab == NULL) |
afd9acee L |
1788 | { |
1789 | sec->check_relocs_failed = 1; | |
1790 | return FALSE; | |
1791 | } | |
4dfe6ac6 | 1792 | |
fe53b4a4 L |
1793 | BFD_ASSERT (is_x86_elf (abfd, htab)); |
1794 | ||
bedfd056 L |
1795 | /* Get the section contents. */ |
1796 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1797 | contents = elf_section_data (sec)->this_hdr.contents; | |
1798 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1799 | { | |
1800 | sec->check_relocs_failed = 1; | |
1801 | return FALSE; | |
1802 | } | |
1803 | ||
0ffa91dd | 1804 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1805 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1806 | |
5e5e02ae L |
1807 | converted = FALSE; |
1808 | ||
c434dee6 | 1809 | sreloc = NULL; |
cbe950e9 | 1810 | |
70256ad8 AJ |
1811 | rel_end = relocs + sec->reloc_count; |
1812 | for (rel = relocs; rel < rel_end; rel++) | |
1813 | { | |
bffbf940 | 1814 | unsigned int r_type; |
d42c267e | 1815 | unsigned int r_symndx; |
70256ad8 | 1816 | struct elf_link_hash_entry *h; |
0afcef53 | 1817 | struct elf_x86_link_hash_entry *eh; |
4c544807 L |
1818 | Elf_Internal_Sym *isym; |
1819 | const char *name; | |
06a6a421 | 1820 | bfd_boolean size_reloc; |
6999821f | 1821 | bfd_boolean converted_reloc; |
70256ad8 | 1822 | |
351f65ca L |
1823 | r_symndx = htab->r_sym (rel->r_info); |
1824 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1825 | |
1826 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1827 | { | |
695344c0 | 1828 | /* xgettext:c-format */ |
871b3ab2 | 1829 | _bfd_error_handler (_("%pB: bad symbol index: %d"), |
4eca0228 | 1830 | abfd, r_symndx); |
afd9acee | 1831 | goto error_return; |
c434dee6 AJ |
1832 | } |
1833 | ||
70256ad8 | 1834 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1835 | { |
1836 | /* A local symbol. */ | |
c2e61a4e L |
1837 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1838 | abfd, r_symndx); | |
1839 | if (isym == NULL) | |
afd9acee | 1840 | goto error_return; |
c25bc9fc L |
1841 | |
1842 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1843 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1844 | { |
0afcef53 L |
1845 | h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, |
1846 | TRUE); | |
c25bc9fc | 1847 | if (h == NULL) |
afd9acee | 1848 | goto error_return; |
6bbec505 | 1849 | |
c25bc9fc | 1850 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
1851 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
1852 | isym, NULL); | |
c25bc9fc L |
1853 | h->type = STT_GNU_IFUNC; |
1854 | h->def_regular = 1; | |
1855 | h->ref_regular = 1; | |
1856 | h->forced_local = 1; | |
1857 | h->root.type = bfd_link_hash_defined; | |
1858 | } | |
1859 | else | |
1860 | h = NULL; | |
1861 | } | |
70256ad8 | 1862 | else |
71cb9464 | 1863 | { |
4c544807 | 1864 | isym = NULL; |
71cb9464 L |
1865 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1866 | while (h->root.type == bfd_link_hash_indirect | |
1867 | || h->root.type == bfd_link_hash_warning) | |
1868 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1869 | } |
cbe950e9 | 1870 | |
d1534d16 L |
1871 | /* Check invalid x32 relocations. */ |
1872 | if (!ABI_64_P (abfd)) | |
1873 | switch (r_type) | |
1874 | { | |
1875 | default: | |
1876 | break; | |
1877 | ||
d1534d16 L |
1878 | case R_X86_64_DTPOFF64: |
1879 | case R_X86_64_TPOFF64: | |
1880 | case R_X86_64_PC64: | |
1881 | case R_X86_64_GOTOFF64: | |
1882 | case R_X86_64_GOT64: | |
1883 | case R_X86_64_GOTPCREL64: | |
1884 | case R_X86_64_GOTPC64: | |
1885 | case R_X86_64_GOTPLT64: | |
1886 | case R_X86_64_PLTOFF64: | |
1887 | { | |
1888 | if (h) | |
1889 | name = h->root.root.string; | |
1890 | else | |
1891 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1892 | NULL); | |
4eca0228 | 1893 | _bfd_error_handler |
695344c0 | 1894 | /* xgettext:c-format */ |
871b3ab2 | 1895 | (_("%pB: relocation %s against symbol `%s' isn't " |
d1534d16 L |
1896 | "supported in x32 mode"), abfd, |
1897 | x86_64_elf_howto_table[r_type].name, name); | |
1898 | bfd_set_error (bfd_error_bad_value); | |
afd9acee | 1899 | goto error_return; |
d1534d16 L |
1900 | } |
1901 | break; | |
1902 | } | |
1903 | ||
c25bc9fc L |
1904 | if (h != NULL) |
1905 | { | |
ad1e85de L |
1906 | /* It is referenced by a non-shared object. */ |
1907 | h->ref_regular = 1; | |
13a2df29 L |
1908 | |
1909 | if (h->type == STT_GNU_IFUNC) | |
1910 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
1911 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 1912 | } |
70256ad8 | 1913 | |
6999821f L |
1914 | converted_reloc = FALSE; |
1915 | if ((r_type == R_X86_64_GOTPCREL | |
1916 | || r_type == R_X86_64_GOTPCRELX | |
1917 | || r_type == R_X86_64_REX_GOTPCRELX) | |
1918 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
1919 | { | |
1920 | Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel; | |
1921 | if (!elf_x86_64_convert_load_reloc (abfd, contents, &r_type, | |
1922 | irel, h, &converted_reloc, | |
1923 | info)) | |
1924 | goto error_return; | |
5e5e02ae L |
1925 | |
1926 | if (converted_reloc) | |
1927 | converted = TRUE; | |
6999821f L |
1928 | } |
1929 | ||
bedfd056 | 1930 | if (! elf_x86_64_tls_transition (info, abfd, sec, contents, |
351f65ca L |
1931 | symtab_hdr, sym_hashes, |
1932 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 1933 | rel, rel_end, h, r_symndx, FALSE)) |
afd9acee | 1934 | goto error_return; |
142411ca | 1935 | |
cd048363 L |
1936 | /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */ |
1937 | if (h == htab->elf.hgot) | |
1938 | htab->got_referenced = TRUE; | |
1939 | ||
0afcef53 | 1940 | eh = (struct elf_x86_link_hash_entry *) h; |
bffbf940 | 1941 | switch (r_type) |
70256ad8 | 1942 | { |
bffbf940 | 1943 | case R_X86_64_TLSLD: |
0f09b4d8 | 1944 | htab->tls_ld_or_ldm_got.refcount = 1; |
bffbf940 JJ |
1945 | goto create_got; |
1946 | ||
1947 | case R_X86_64_TPOFF32: | |
0e1862bb | 1948 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
aab921ad | 1949 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 1950 | &x86_64_elf_howto_table[r_type]); |
aec6b87e | 1951 | if (eh != NULL) |
98b273dc | 1952 | eh->zero_undefweak &= 0x2; |
bffbf940 | 1953 | break; |
c434dee6 | 1954 | |
bffbf940 | 1955 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1956 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
1957 | info->flags |= DF_STATIC_TLS; |
1958 | /* Fall through */ | |
70256ad8 | 1959 | |
bffbf940 JJ |
1960 | case R_X86_64_GOT32: |
1961 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
1962 | case R_X86_64_GOTPCRELX: |
1963 | case R_X86_64_REX_GOTPCRELX: | |
bffbf940 | 1964 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
1965 | case R_X86_64_GOT64: |
1966 | case R_X86_64_GOTPCREL64: | |
1967 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
1968 | case R_X86_64_GOTPC32_TLSDESC: |
1969 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
1970 | /* This symbol requires a global offset table entry. */ |
1971 | { | |
1972 | int tls_type, old_tls_type; | |
1973 | ||
1974 | switch (r_type) | |
1975 | { | |
1976 | default: tls_type = GOT_NORMAL; break; | |
1977 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
1978 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
1979 | case R_X86_64_GOTPC32_TLSDESC: |
1980 | case R_X86_64_TLSDESC_CALL: | |
1981 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
1982 | } |
1983 | ||
1984 | if (h != NULL) | |
1985 | { | |
0f09b4d8 | 1986 | h->got.refcount = 1; |
aec6b87e | 1987 | old_tls_type = eh->tls_type; |
bffbf940 JJ |
1988 | } |
1989 | else | |
1990 | { | |
1991 | bfd_signed_vma *local_got_refcounts; | |
1992 | ||
1993 | /* This is a global offset table entry for a local symbol. */ | |
1994 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1995 | if (local_got_refcounts == NULL) | |
1996 | { | |
1997 | bfd_size_type size; | |
1998 | ||
1999 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
2000 | size *= sizeof (bfd_signed_vma) |
2001 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
2002 | local_got_refcounts = ((bfd_signed_vma *) |
2003 | bfd_zalloc (abfd, size)); | |
2004 | if (local_got_refcounts == NULL) | |
afd9acee | 2005 | goto error_return; |
bffbf940 | 2006 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
0afcef53 | 2007 | elf_x86_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 2008 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
0afcef53 | 2009 | elf_x86_local_got_tls_type (abfd) |
67a4f2b7 | 2010 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 | 2011 | } |
0f09b4d8 | 2012 | local_got_refcounts[r_symndx] = 1; |
bffbf940 | 2013 | old_tls_type |
0afcef53 | 2014 | = elf_x86_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
2015 | } |
2016 | ||
2017 | /* If a TLS symbol is accessed using IE at least once, | |
2018 | there is no point to use dynamic model for it. */ | |
2019 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
2020 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
2021 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 2022 | { |
67a4f2b7 | 2023 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 2024 | tls_type = old_tls_type; |
67a4f2b7 AO |
2025 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2026 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2027 | tls_type |= old_tls_type; | |
bffbf940 JJ |
2028 | else |
2029 | { | |
09a24cbf | 2030 | if (h) |
4c544807 L |
2031 | name = h->root.root.string; |
2032 | else | |
2033 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
2034 | isym, NULL); | |
4eca0228 | 2035 | _bfd_error_handler |
695344c0 | 2036 | /* xgettext:c-format */ |
871b3ab2 | 2037 | (_("%pB: '%s' accessed both as normal and" |
63a5468a | 2038 | " thread local symbol"), |
4c544807 | 2039 | abfd, name); |
68c4a57e | 2040 | bfd_set_error (bfd_error_bad_value); |
afd9acee | 2041 | goto error_return; |
bffbf940 JJ |
2042 | } |
2043 | } | |
2044 | ||
2045 | if (old_tls_type != tls_type) | |
2046 | { | |
aec6b87e L |
2047 | if (eh != NULL) |
2048 | eh->tls_type = tls_type; | |
bffbf940 | 2049 | else |
0afcef53 | 2050 | elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
2051 | } |
2052 | } | |
c434dee6 AJ |
2053 | /* Fall through */ |
2054 | ||
d6ab8113 JB |
2055 | case R_X86_64_GOTOFF64: |
2056 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2057 | case R_X86_64_GOTPC64: |
bffbf940 | 2058 | create_got: |
aec6b87e | 2059 | if (eh != NULL) |
98b273dc | 2060 | eh->zero_undefweak &= 0x2; |
70256ad8 AJ |
2061 | break; |
2062 | ||
2063 | case R_X86_64_PLT32: | |
c3320543 | 2064 | case R_X86_64_PLT32_BND: |
70256ad8 | 2065 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
2066 | actually build the entry in adjust_dynamic_symbol, |
2067 | because this might be a case of linking PIC code which is | |
2068 | never referenced by a dynamic object, in which case we | |
2069 | don't need to generate a procedure linkage table entry | |
2070 | after all. */ | |
70256ad8 AJ |
2071 | |
2072 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 2073 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
2074 | if (h == NULL) |
2075 | continue; | |
2076 | ||
98b273dc | 2077 | eh->zero_undefweak &= 0x2; |
f5385ebf | 2078 | h->needs_plt = 1; |
79b0c981 | 2079 | h->plt.refcount = 1; |
70256ad8 AJ |
2080 | break; |
2081 | ||
7b81dfbb AJ |
2082 | case R_X86_64_PLTOFF64: |
2083 | /* This tries to form the 'address' of a function relative | |
2084 | to GOT. For global symbols we need a PLT entry. */ | |
2085 | if (h != NULL) | |
2086 | { | |
2087 | h->needs_plt = 1; | |
79b0c981 | 2088 | h->plt.refcount = 1; |
7b81dfbb AJ |
2089 | } |
2090 | goto create_got; | |
2091 | ||
6a3e1bae L |
2092 | case R_X86_64_SIZE32: |
2093 | case R_X86_64_SIZE64: | |
06a6a421 | 2094 | size_reloc = TRUE; |
6a3e1bae L |
2095 | goto do_size; |
2096 | ||
248775ba L |
2097 | case R_X86_64_32: |
2098 | if (!ABI_64_P (abfd)) | |
2099 | goto pointer; | |
1a0670f3 | 2100 | /* Fall through. */ |
cc78d0af AJ |
2101 | case R_X86_64_8: |
2102 | case R_X86_64_16: | |
70256ad8 | 2103 | case R_X86_64_32S: |
338c190a L |
2104 | /* Check relocation overflow as these relocs may lead to |
2105 | run-time relocation overflow. Don't error out for | |
1b71fb54 | 2106 | sections we don't care about, such as debug sections or |
338c190a | 2107 | when relocation overflow check is disabled. */ |
4c10bbaa | 2108 | if (!info->no_reloc_overflow_check |
6999821f | 2109 | && !converted_reloc |
338c190a L |
2110 | && (bfd_link_pic (info) |
2111 | || (bfd_link_executable (info) | |
2112 | && h != NULL | |
2113 | && !h->def_regular | |
2114 | && h->def_dynamic | |
081b1afe | 2115 | && (sec->flags & SEC_READONLY) == 0))) |
aab921ad | 2116 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2117 | &x86_64_elf_howto_table[r_type]); |
1b71fb54 AJ |
2118 | /* Fall through. */ |
2119 | ||
c434dee6 AJ |
2120 | case R_X86_64_PC8: |
2121 | case R_X86_64_PC16: | |
70256ad8 | 2122 | case R_X86_64_PC32: |
c3320543 | 2123 | case R_X86_64_PC32_BND: |
d6ab8113 | 2124 | case R_X86_64_PC64: |
1b71fb54 | 2125 | case R_X86_64_64: |
248775ba | 2126 | pointer: |
aec6b87e | 2127 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
98b273dc | 2128 | eh->zero_undefweak |= 0x2; |
bf52d7c7 L |
2129 | /* We are called after all symbols have been resolved. Only |
2130 | relocation against STT_GNU_IFUNC symbol must go through | |
2131 | PLT. */ | |
d1ed1c7d L |
2132 | if (h != NULL |
2133 | && (bfd_link_executable (info) | |
bf52d7c7 | 2134 | || h->type == STT_GNU_IFUNC)) |
c434dee6 | 2135 | { |
79b0c981 | 2136 | bfd_boolean func_pointer_ref = FALSE; |
233cc9c1 | 2137 | |
5db4f0d3 L |
2138 | if (r_type == R_X86_64_PC32) |
2139 | { | |
2140 | /* Since something like ".long foo - ." may be used | |
2141 | as pointer, make sure that PLT is used if foo is | |
2142 | a function defined in a shared library. */ | |
2143 | if ((sec->flags & SEC_CODE) == 0) | |
451875b4 L |
2144 | { |
2145 | h->pointer_equality_needed = 1; | |
2146 | if (bfd_link_pie (info) | |
2147 | && h->type == STT_FUNC | |
2148 | && !h->def_regular | |
2149 | && h->def_dynamic) | |
2150 | { | |
2151 | h->needs_plt = 1; | |
2152 | h->plt.refcount = 1; | |
2153 | } | |
2154 | } | |
5db4f0d3 L |
2155 | } |
2156 | else if (r_type != R_X86_64_PC32_BND | |
2157 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
2158 | { |
2159 | h->pointer_equality_needed = 1; | |
2160 | /* At run-time, R_X86_64_64 can be resolved for both | |
2161 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
2162 | can only be resolved for x32. */ | |
2163 | if ((sec->flags & SEC_READONLY) == 0 | |
2164 | && (r_type == R_X86_64_64 | |
2165 | || (!ABI_64_P (abfd) | |
2166 | && (r_type == R_X86_64_32 | |
2167 | || r_type == R_X86_64_32S)))) | |
79b0c981 L |
2168 | func_pointer_ref = TRUE; |
2169 | } | |
2170 | ||
2171 | if (!func_pointer_ref) | |
2172 | { | |
2173 | /* If this reloc is in a read-only section, we might | |
2174 | need a copy reloc. We can't check reliably at this | |
2175 | stage whether the section is read-only, as input | |
2176 | sections have not yet been mapped to output sections. | |
2177 | Tentatively set the flag for now, and correct in | |
2178 | adjust_dynamic_symbol. */ | |
2179 | h->non_got_ref = 1; | |
2180 | ||
2181 | /* We may need a .plt entry if the symbol is a function | |
2182 | defined in a shared lib or is a function referenced | |
2183 | from the code or read-only section. */ | |
2184 | if (!h->def_regular | |
2185 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
2186 | h->plt.refcount = 1; | |
04ebc307 | 2187 | } |
c434dee6 | 2188 | } |
70256ad8 | 2189 | |
06a6a421 | 2190 | size_reloc = FALSE; |
6a3e1bae | 2191 | do_size: |
451875b4 | 2192 | if (NEED_DYNAMIC_RELOCATION_P (info, TRUE, h, sec, r_type, |
daf1c414 | 2193 | htab->pointer_r_type)) |
70256ad8 | 2194 | { |
e03a8ed8 L |
2195 | struct elf_dyn_relocs *p; |
2196 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2197 | |
2198 | /* We must copy these reloc types into the output file. | |
2199 | Create a reloc section in dynobj and make room for | |
2200 | this reloc. */ | |
70256ad8 AJ |
2201 | if (sreloc == NULL) |
2202 | { | |
83bac4b0 | 2203 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
2204 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
2205 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 2206 | |
70256ad8 | 2207 | if (sreloc == NULL) |
afd9acee | 2208 | goto error_return; |
70256ad8 AJ |
2209 | } |
2210 | ||
c434dee6 AJ |
2211 | /* If this is a global symbol, we count the number of |
2212 | relocations we need for this symbol. */ | |
2213 | if (h != NULL) | |
aec6b87e | 2214 | head = &eh->dyn_relocs; |
c434dee6 AJ |
2215 | else |
2216 | { | |
2217 | /* Track dynamic relocs needed for local syms too. | |
2218 | We really need local syms available to do this | |
2219 | easily. Oh well. */ | |
c434dee6 | 2220 | asection *s; |
87d72d41 | 2221 | void **vpp; |
87d72d41 AM |
2222 | |
2223 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2224 | abfd, r_symndx); | |
2225 | if (isym == NULL) | |
afd9acee | 2226 | goto error_return; |
87d72d41 AM |
2227 | |
2228 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2229 | if (s == NULL) |
87d72d41 | 2230 | s = sec; |
70256ad8 | 2231 | |
e81d3500 DD |
2232 | /* Beware of type punned pointers vs strict aliasing |
2233 | rules. */ | |
2234 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2235 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2236 | } |
70256ad8 | 2237 | |
c434dee6 AJ |
2238 | p = *head; |
2239 | if (p == NULL || p->sec != sec) | |
2240 | { | |
2241 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 2242 | |
e03a8ed8 | 2243 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2244 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2245 | if (p == NULL) |
afd9acee | 2246 | goto error_return; |
c434dee6 AJ |
2247 | p->next = *head; |
2248 | *head = p; | |
2249 | p->sec = sec; | |
2250 | p->count = 0; | |
2251 | p->pc_count = 0; | |
70256ad8 | 2252 | } |
c434dee6 AJ |
2253 | |
2254 | p->count += 1; | |
06a6a421 | 2255 | /* Count size relocation as PC-relative relocation. */ |
daf1c414 | 2256 | if (X86_PCREL_TYPE_P (r_type) || size_reloc) |
c434dee6 | 2257 | p->pc_count += 1; |
70256ad8 AJ |
2258 | } |
2259 | break; | |
fe4770f4 AJ |
2260 | |
2261 | /* This relocation describes the C++ object vtable hierarchy. | |
2262 | Reconstruct it for later use during GC. */ | |
2263 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2264 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
afd9acee | 2265 | goto error_return; |
fe4770f4 AJ |
2266 | break; |
2267 | ||
2268 | /* This relocation describes which C++ vtable entries are actually | |
2269 | used. Record for later use during GC. */ | |
2270 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
2271 | BFD_ASSERT (h != NULL); |
2272 | if (h != NULL | |
2273 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
afd9acee | 2274 | goto error_return; |
fe4770f4 | 2275 | break; |
c434dee6 AJ |
2276 | |
2277 | default: | |
2278 | break; | |
70256ad8 AJ |
2279 | } |
2280 | } | |
2281 | ||
bedfd056 L |
2282 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2283 | { | |
5e5e02ae | 2284 | if (!converted && !info->keep_memory) |
bedfd056 L |
2285 | free (contents); |
2286 | else | |
2287 | { | |
5e5e02ae L |
2288 | /* Cache the section contents for elf_link_input_bfd if any |
2289 | load is converted or --no-keep-memory isn't used. */ | |
bedfd056 L |
2290 | elf_section_data (sec)->this_hdr.contents = contents; |
2291 | } | |
2292 | } | |
2293 | ||
5e5e02ae L |
2294 | /* Cache relocations if any load is converted. */ |
2295 | if (elf_section_data (sec)->relocs != relocs && converted) | |
2296 | elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs; | |
2297 | ||
b34976b6 | 2298 | return TRUE; |
afd9acee L |
2299 | |
2300 | error_return: | |
bedfd056 L |
2301 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2302 | free (contents); | |
afd9acee L |
2303 | sec->check_relocs_failed = 1; |
2304 | return FALSE; | |
70256ad8 AJ |
2305 | } |
2306 | ||
bffbf940 JJ |
2307 | /* Return the relocation value for @tpoff relocation |
2308 | if STT_TLS virtual address is ADDRESS. */ | |
2309 | ||
2310 | static bfd_vma | |
351f65ca | 2311 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 2312 | { |
e1918d23 | 2313 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
2314 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
2315 | bfd_vma static_tls_size; | |
bffbf940 JJ |
2316 | |
2317 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 2318 | if (htab->tls_sec == NULL) |
bffbf940 | 2319 | return 0; |
7dc98aea RO |
2320 | |
2321 | /* Consider special static TLS alignment requirements. */ | |
2322 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
2323 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
2324 | } |
2325 | ||
8d88c4ca NC |
2326 | /* Relocate an x86_64 ELF section. */ |
2327 | ||
b34976b6 | 2328 | static bfd_boolean |
351f65ca L |
2329 | elf_x86_64_relocate_section (bfd *output_bfd, |
2330 | struct bfd_link_info *info, | |
2331 | bfd *input_bfd, | |
2332 | asection *input_section, | |
2333 | bfd_byte *contents, | |
2334 | Elf_Internal_Rela *relocs, | |
2335 | Elf_Internal_Sym *local_syms, | |
2336 | asection **local_sections) | |
8d88c4ca | 2337 | { |
0afcef53 | 2338 | struct elf_x86_link_hash_table *htab; |
8d88c4ca NC |
2339 | Elf_Internal_Shdr *symtab_hdr; |
2340 | struct elf_link_hash_entry **sym_hashes; | |
2341 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2342 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 2343 | Elf_Internal_Rela *rel; |
60f2e42e | 2344 | Elf_Internal_Rela *wrel; |
8d88c4ca | 2345 | Elf_Internal_Rela *relend; |
38b12349 | 2346 | unsigned int plt_entry_size; |
8d88c4ca | 2347 | |
338c190a L |
2348 | /* Skip if check_relocs failed. */ |
2349 | if (input_section->check_relocs_failed) | |
2350 | return FALSE; | |
2351 | ||
0afcef53 | 2352 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
2353 | if (htab == NULL) |
2354 | return FALSE; | |
fe53b4a4 L |
2355 | |
2356 | BFD_ASSERT (is_x86_elf (input_bfd, htab)); | |
2357 | ||
765e526c | 2358 | plt_entry_size = htab->plt.plt_entry_size; |
0ffa91dd | 2359 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
2360 | sym_hashes = elf_sym_hashes (input_bfd); |
2361 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
0afcef53 | 2362 | local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 2363 | |
0afcef53 | 2364 | _bfd_x86_elf_set_tls_module_base (info); |
9f03412a | 2365 | |
60f2e42e | 2366 | rel = wrel = relocs; |
8d88c4ca | 2367 | relend = relocs + input_section->reloc_count; |
60f2e42e | 2368 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 2369 | { |
419414ea | 2370 | unsigned int r_type, r_type_tls; |
8d88c4ca NC |
2371 | reloc_howto_type *howto; |
2372 | unsigned long r_symndx; | |
2373 | struct elf_link_hash_entry *h; | |
0afcef53 | 2374 | struct elf_x86_link_hash_entry *eh; |
8d88c4ca NC |
2375 | Elf_Internal_Sym *sym; |
2376 | asection *sec; | |
0ff2b86e | 2377 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 2378 | bfd_vma relocation; |
b34976b6 | 2379 | bfd_boolean unresolved_reloc; |
8d88c4ca | 2380 | bfd_reloc_status_type r; |
bffbf940 | 2381 | int tls_type; |
0ff2b86e | 2382 | asection *base_got, *resolved_plt; |
1788fc08 | 2383 | bfd_vma st_size; |
aec6b87e | 2384 | bfd_boolean resolved_to_zero; |
9e9821dd | 2385 | bfd_boolean relative_reloc; |
78984959 | 2386 | bfd_boolean converted_reloc; |
aebcc8ff | 2387 | bfd_boolean need_copy_reloc_in_pie; |
8d88c4ca | 2388 | |
351f65ca | 2389 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
2390 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
2391 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
2392 | { |
2393 | if (wrel != rel) | |
2394 | *wrel = *rel; | |
2395 | continue; | |
2396 | } | |
8d88c4ca | 2397 | |
78984959 L |
2398 | converted_reloc = (r_type & R_X86_64_converted_reloc_bit) != 0; |
2399 | r_type &= ~R_X86_64_converted_reloc_bit; | |
2400 | ||
9911c0fc | 2401 | if (r_type >= (int) R_X86_64_standard) |
47aeb64c | 2402 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
8d88c4ca | 2403 | |
d7921315 | 2404 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 2405 | || ABI_64_P (output_bfd)) |
d7921315 L |
2406 | howto = x86_64_elf_howto_table + r_type; |
2407 | else | |
2408 | howto = (x86_64_elf_howto_table | |
2409 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 2410 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
2411 | h = NULL; |
2412 | sym = NULL; | |
2413 | sec = NULL; | |
b34976b6 | 2414 | unresolved_reloc = FALSE; |
8d88c4ca | 2415 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
2416 | { |
2417 | sym = local_syms + r_symndx; | |
2418 | sec = local_sections[r_symndx]; | |
c434dee6 | 2419 | |
c25bc9fc L |
2420 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
2421 | &sec, rel); | |
1788fc08 | 2422 | st_size = sym->st_size; |
c25bc9fc L |
2423 | |
2424 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 2425 | if (!bfd_link_relocatable (info) |
351f65ca | 2426 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 2427 | { |
0afcef53 L |
2428 | h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, |
2429 | rel, FALSE); | |
c25bc9fc L |
2430 | if (h == NULL) |
2431 | abort (); | |
2432 | ||
eed180f8 | 2433 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
2434 | h->root.u.def.value = sym->st_value; |
2435 | h->root.u.def.section = sec; | |
2436 | } | |
8da6118f | 2437 | } |
8d88c4ca | 2438 | else |
8da6118f | 2439 | { |
c9736ba0 | 2440 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 2441 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
c434dee6 | 2442 | |
b2a8e766 AM |
2443 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2444 | r_symndx, symtab_hdr, sym_hashes, | |
2445 | h, sec, relocation, | |
62d887d4 | 2446 | unresolved_reloc, warned, ignored); |
1788fc08 | 2447 | st_size = h->size; |
8da6118f | 2448 | } |
ab96bf03 | 2449 | |
dbaa2011 | 2450 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
2451 | { |
2452 | _bfd_clear_contents (howto, input_bfd, input_section, | |
2453 | contents + rel->r_offset); | |
2454 | wrel->r_offset = rel->r_offset; | |
2455 | wrel->r_info = 0; | |
2456 | wrel->r_addend = 0; | |
2457 | ||
2458 | /* For ld -r, remove relocations in debug sections against | |
2459 | sections defined in discarded sections. Not done for | |
2460 | eh_frame editing code expects to be present. */ | |
2461 | if (bfd_link_relocatable (info) | |
2462 | && (input_section->flags & SEC_DEBUGGING)) | |
2463 | wrel--; | |
2464 | ||
2465 | continue; | |
2466 | } | |
ab96bf03 | 2467 | |
0e1862bb | 2468 | if (bfd_link_relocatable (info)) |
2d5da473 L |
2469 | { |
2470 | if (wrel != rel) | |
2471 | *wrel = *rel; | |
2472 | continue; | |
2473 | } | |
ab96bf03 | 2474 | |
1788fc08 | 2475 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 2476 | { |
1788fc08 L |
2477 | if (r_type == R_X86_64_64) |
2478 | { | |
2479 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
2480 | zero-extend it to 64bit if addend is zero. */ | |
2481 | r_type = R_X86_64_32; | |
2482 | memset (contents + rel->r_offset + 4, 0, 4); | |
2483 | } | |
2484 | else if (r_type == R_X86_64_SIZE64) | |
2485 | { | |
2486 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
2487 | zero-extend it to 64bit if addend is zero. */ | |
2488 | r_type = R_X86_64_SIZE32; | |
2489 | memset (contents + rel->r_offset + 4, 0, 4); | |
2490 | } | |
64d25c44 L |
2491 | } |
2492 | ||
0afcef53 | 2493 | eh = (struct elf_x86_link_hash_entry *) h; |
0ff2b86e | 2494 | |
cbe950e9 L |
2495 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
2496 | it here if it is defined in a non-shared object. */ | |
2497 | if (h != NULL | |
2498 | && h->type == STT_GNU_IFUNC | |
2499 | && h->def_regular) | |
2500 | { | |
cbe950e9 | 2501 | bfd_vma plt_index; |
4c544807 | 2502 | const char *name; |
cbe950e9 | 2503 | |
97dc35c8 L |
2504 | if ((input_section->flags & SEC_ALLOC) == 0) |
2505 | { | |
347a8774 L |
2506 | /* If this is a SHT_NOTE section without SHF_ALLOC, treat |
2507 | STT_GNU_IFUNC symbol as STT_FUNC. */ | |
2508 | if (elf_section_type (input_section) == SHT_NOTE) | |
2509 | goto skip_ifunc; | |
97dc35c8 L |
2510 | /* Dynamic relocs are not propagated for SEC_DEBUGGING |
2511 | sections because such sections are not SEC_ALLOC and | |
2512 | thus ld.so will not process them. */ | |
2513 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 2514 | continue; |
97dc35c8 L |
2515 | abort (); |
2516 | } | |
233cc9c1 L |
2517 | |
2518 | switch (r_type) | |
2519 | { | |
2520 | default: | |
2521 | break; | |
2522 | ||
2523 | case R_X86_64_GOTPCREL: | |
2524 | case R_X86_64_GOTPCRELX: | |
2525 | case R_X86_64_REX_GOTPCRELX: | |
2526 | case R_X86_64_GOTPCREL64: | |
2527 | base_got = htab->elf.sgot; | |
2528 | off = h->got.offset; | |
2529 | ||
2530 | if (base_got == NULL) | |
2531 | abort (); | |
2532 | ||
2533 | if (off == (bfd_vma) -1) | |
2534 | { | |
2535 | /* We can't use h->got.offset here to save state, or | |
2536 | even just remember the offset, as finish_dynamic_symbol | |
2537 | would use that as offset into .got. */ | |
2538 | ||
2539 | if (h->plt.offset == (bfd_vma) -1) | |
2540 | abort (); | |
2541 | ||
2542 | if (htab->elf.splt != NULL) | |
2543 | { | |
38b12349 | 2544 | plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2545 | - htab->plt.has_plt0); |
233cc9c1 L |
2546 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
2547 | base_got = htab->elf.sgotplt; | |
2548 | } | |
2549 | else | |
2550 | { | |
2551 | plt_index = h->plt.offset / plt_entry_size; | |
2552 | off = plt_index * GOT_ENTRY_SIZE; | |
2553 | base_got = htab->elf.igotplt; | |
2554 | } | |
2555 | ||
2556 | if (h->dynindx == -1 | |
2557 | || h->forced_local | |
2558 | || info->symbolic) | |
2559 | { | |
2560 | /* This references the local defitionion. We must | |
2561 | initialize this entry in the global offset table. | |
2562 | Since the offset must always be a multiple of 8, | |
2563 | we use the least significant bit to record | |
2564 | whether we have initialized it already. | |
2565 | ||
2566 | When doing a dynamic link, we create a .rela.got | |
2567 | relocation entry to initialize the value. This | |
2568 | is done in the finish_dynamic_symbol routine. */ | |
2569 | if ((off & 1) != 0) | |
2570 | off &= ~1; | |
2571 | else | |
2572 | { | |
2573 | bfd_put_64 (output_bfd, relocation, | |
2574 | base_got->contents + off); | |
2575 | /* Note that this is harmless for the GOTPLT64 | |
2576 | case, as -1 | 1 still is -1. */ | |
2577 | h->got.offset |= 1; | |
2578 | } | |
2579 | } | |
2580 | } | |
2581 | ||
2582 | relocation = (base_got->output_section->vma | |
2583 | + base_got->output_offset + off); | |
2584 | ||
2585 | goto do_relocation; | |
2586 | } | |
2587 | ||
2588 | if (h->plt.offset == (bfd_vma) -1) | |
2589 | { | |
2590 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
2591 | if (r_type == htab->pointer_r_type | |
2592 | && (input_section->flags & SEC_CODE) == 0) | |
2593 | goto do_ifunc_pointer; | |
2594 | goto bad_ifunc_reloc; | |
2595 | } | |
cbe950e9 L |
2596 | |
2597 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
2598 | if (htab->elf.splt != NULL) |
2599 | { | |
f2c29a16 | 2600 | if (htab->plt_second != NULL) |
0ff2b86e | 2601 | { |
f2c29a16 L |
2602 | resolved_plt = htab->plt_second; |
2603 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
2604 | } |
2605 | else | |
2606 | { | |
2607 | resolved_plt = htab->elf.splt; | |
2608 | plt_offset = h->plt.offset; | |
2609 | } | |
2610 | } | |
2611 | else | |
2612 | { | |
2613 | resolved_plt = htab->elf.iplt; | |
2614 | plt_offset = h->plt.offset; | |
2615 | } | |
2616 | ||
2617 | relocation = (resolved_plt->output_section->vma | |
2618 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
2619 | |
2620 | switch (r_type) | |
2621 | { | |
2622 | default: | |
233cc9c1 | 2623 | bad_ifunc_reloc: |
4c544807 L |
2624 | if (h->root.root.string) |
2625 | name = h->root.root.string; | |
2626 | else | |
2627 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
2628 | NULL); | |
4eca0228 | 2629 | _bfd_error_handler |
695344c0 | 2630 | /* xgettext:c-format */ |
871b3ab2 | 2631 | (_("%pB: relocation %s against STT_GNU_IFUNC " |
233cc9c1 L |
2632 | "symbol `%s' isn't supported"), input_bfd, |
2633 | howto->name, name); | |
cbe950e9 L |
2634 | bfd_set_error (bfd_error_bad_value); |
2635 | return FALSE; | |
2636 | ||
2637 | case R_X86_64_32S: | |
0e1862bb | 2638 | if (bfd_link_pic (info)) |
cbe950e9 | 2639 | abort (); |
710ab287 L |
2640 | goto do_relocation; |
2641 | ||
248775ba L |
2642 | case R_X86_64_32: |
2643 | if (ABI_64_P (output_bfd)) | |
2644 | goto do_relocation; | |
17672001 | 2645 | /* FALLTHROUGH */ |
eed180f8 | 2646 | case R_X86_64_64: |
233cc9c1 | 2647 | do_ifunc_pointer: |
710ab287 L |
2648 | if (rel->r_addend != 0) |
2649 | { | |
4c544807 L |
2650 | if (h->root.root.string) |
2651 | name = h->root.root.string; | |
2652 | else | |
2653 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
2654 | sym, NULL); | |
4eca0228 | 2655 | _bfd_error_handler |
695344c0 | 2656 | /* xgettext:c-format */ |
871b3ab2 | 2657 | (_("%pB: relocation %s against STT_GNU_IFUNC " |
2dcf00ce AM |
2658 | "symbol `%s' has non-zero addend: %" PRId64), |
2659 | input_bfd, howto->name, name, (int64_t) rel->r_addend); | |
710ab287 L |
2660 | bfd_set_error (bfd_error_bad_value); |
2661 | return FALSE; | |
2662 | } | |
2663 | ||
2664 | /* Generate dynamic relcoation only when there is a | |
233cc9c1 L |
2665 | non-GOT reference in a shared object or there is no |
2666 | PLT. */ | |
2667 | if ((bfd_link_pic (info) && h->non_got_ref) | |
2668 | || h->plt.offset == (bfd_vma) -1) | |
710ab287 L |
2669 | { |
2670 | Elf_Internal_Rela outrel; | |
710ab287 L |
2671 | asection *sreloc; |
2672 | ||
c25bc9fc L |
2673 | /* Need a dynamic relocation to get the real function |
2674 | address. */ | |
710ab287 L |
2675 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
2676 | info, | |
2677 | input_section, | |
2678 | rel->r_offset); | |
2679 | if (outrel.r_offset == (bfd_vma) -1 | |
2680 | || outrel.r_offset == (bfd_vma) -2) | |
2681 | abort (); | |
2682 | ||
2683 | outrel.r_offset += (input_section->output_section->vma | |
2684 | + input_section->output_offset); | |
2685 | ||
cf1070f1 | 2686 | if (POINTER_LOCAL_IFUNC_P (info, h)) |
710ab287 | 2687 | { |
871b3ab2 | 2688 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
2689 | h->root.root.string, |
2690 | h->root.u.def.section->owner); | |
2691 | ||
710ab287 | 2692 | /* This symbol is resolved locally. */ |
56b8aada L |
2693 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
2694 | outrel.r_addend = (h->root.u.def.value | |
2695 | + h->root.u.def.section->output_section->vma | |
2696 | + h->root.u.def.section->output_offset); | |
710ab287 L |
2697 | } |
2698 | else | |
2699 | { | |
351f65ca | 2700 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
2701 | outrel.r_addend = 0; |
2702 | } | |
2703 | ||
233cc9c1 L |
2704 | /* Dynamic relocations are stored in |
2705 | 1. .rela.ifunc section in PIC object. | |
2706 | 2. .rela.got section in dynamic executable. | |
2707 | 3. .rela.iplt section in static executable. */ | |
2708 | if (bfd_link_pic (info)) | |
2709 | sreloc = htab->elf.irelifunc; | |
2710 | else if (htab->elf.splt != NULL) | |
2711 | sreloc = htab->elf.srelgot; | |
2712 | else | |
2713 | sreloc = htab->elf.irelplt; | |
351f65ca | 2714 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
2715 | |
2716 | /* If this reloc is against an external symbol, we | |
2717 | do not want to fiddle with the addend. Otherwise, | |
2718 | we need to include the symbol value so that it | |
2719 | becomes an addend for the dynamic reloc. For an | |
2720 | internal symbol, we have updated addend. */ | |
56b8aada | 2721 | continue; |
710ab287 | 2722 | } |
17672001 | 2723 | /* FALLTHROUGH */ |
cbe950e9 | 2724 | case R_X86_64_PC32: |
c3320543 | 2725 | case R_X86_64_PC32_BND: |
cbe950e9 L |
2726 | case R_X86_64_PC64: |
2727 | case R_X86_64_PLT32: | |
c3320543 | 2728 | case R_X86_64_PLT32_BND: |
cbe950e9 | 2729 | goto do_relocation; |
cbe950e9 L |
2730 | } |
2731 | } | |
2732 | ||
347a8774 | 2733 | skip_ifunc: |
aec6b87e | 2734 | resolved_to_zero = (eh != NULL |
c5bce5c6 | 2735 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh)); |
aec6b87e | 2736 | |
70256ad8 AJ |
2737 | /* When generating a shared object, the relocations handled here are |
2738 | copied into the output file to be resolved at run time. */ | |
2739 | switch (r_type) | |
2740 | { | |
2741 | case R_X86_64_GOT32: | |
7b81dfbb | 2742 | case R_X86_64_GOT64: |
70256ad8 AJ |
2743 | /* Relocation is to the entry for this symbol in the global |
2744 | offset table. */ | |
70256ad8 | 2745 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
2746 | case R_X86_64_GOTPCRELX: |
2747 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
2748 | case R_X86_64_GOTPCREL64: |
2749 | /* Use global offset table entry as symbol value. */ | |
2750 | case R_X86_64_GOTPLT64: | |
de194d85 | 2751 | /* This is obsolete and treated the same as GOT64. */ |
6de2ae4a | 2752 | base_got = htab->elf.sgot; |
7b81dfbb | 2753 | |
6de2ae4a | 2754 | if (htab->elf.sgot == NULL) |
c434dee6 | 2755 | abort (); |
053579d7 | 2756 | |
9e9821dd | 2757 | relative_reloc = FALSE; |
51e0a107 | 2758 | if (h != NULL) |
70256ad8 | 2759 | { |
c434dee6 | 2760 | off = h->got.offset; |
7b81dfbb | 2761 | if (h->needs_plt |
eed180f8 | 2762 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
2763 | && off == (bfd_vma)-1) |
2764 | { | |
2765 | /* We can't use h->got.offset here to save | |
2766 | state, or even just remember the offset, as | |
2767 | finish_dynamic_symbol would use that as offset into | |
2768 | .got. */ | |
38b12349 | 2769 | bfd_vma plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2770 | - htab->plt.has_plt0); |
7b81dfbb | 2771 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 2772 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
2773 | } |
2774 | ||
2eba97c2 | 2775 | if (RESOLVED_LOCALLY_P (info, h, htab)) |
51e0a107 | 2776 | { |
2eba97c2 L |
2777 | /* We must initialize this entry in the global offset |
2778 | table. Since the offset must always be a multiple | |
2779 | of 8, we use the least significant bit to record | |
2780 | whether we have initialized it already. | |
51e0a107 JH |
2781 | |
2782 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
2783 | relocation entry to initialize the value. This is |
2784 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
2785 | if ((off & 1) != 0) |
2786 | off &= ~1; | |
2787 | else | |
2788 | { | |
2789 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
2790 | base_got->contents + off); |
2791 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 2792 | as -1 | 1 still is -1. */ |
51e0a107 | 2793 | h->got.offset |= 1; |
9e9821dd | 2794 | |
f70656b2 | 2795 | if (GENERATE_RELATIVE_RELOC_P (info, h)) |
9e9821dd L |
2796 | { |
2797 | /* If this symbol isn't dynamic in PIC, | |
2798 | generate R_X86_64_RELATIVE here. */ | |
2799 | eh->no_finish_dynamic_symbol = 1; | |
2800 | relative_reloc = TRUE; | |
2801 | } | |
51e0a107 JH |
2802 | } |
2803 | } | |
053579d7 | 2804 | else |
b34976b6 | 2805 | unresolved_reloc = FALSE; |
70256ad8 | 2806 | } |
51e0a107 JH |
2807 | else |
2808 | { | |
c434dee6 AJ |
2809 | if (local_got_offsets == NULL) |
2810 | abort (); | |
51e0a107 JH |
2811 | |
2812 | off = local_got_offsets[r_symndx]; | |
2813 | ||
2814 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
2815 | the least significant bit to record whether we have |
2816 | already generated the necessary reloc. */ | |
51e0a107 JH |
2817 | if ((off & 1) != 0) |
2818 | off &= ~1; | |
2819 | else | |
2820 | { | |
c434dee6 | 2821 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 2822 | base_got->contents + off); |
9e9821dd | 2823 | local_got_offsets[r_symndx] |= 1; |
51e0a107 | 2824 | |
0e1862bb | 2825 | if (bfd_link_pic (info)) |
9e9821dd | 2826 | relative_reloc = TRUE; |
51e0a107 | 2827 | } |
51e0a107 | 2828 | } |
6a2bda3f | 2829 | |
9e9821dd L |
2830 | if (relative_reloc) |
2831 | { | |
2832 | asection *s; | |
2833 | Elf_Internal_Rela outrel; | |
2834 | ||
2835 | /* We need to generate a R_X86_64_RELATIVE reloc | |
2836 | for the dynamic linker. */ | |
2837 | s = htab->elf.srelgot; | |
2838 | if (s == NULL) | |
2839 | abort (); | |
2840 | ||
2841 | outrel.r_offset = (base_got->output_section->vma | |
2842 | + base_got->output_offset | |
2843 | + off); | |
2844 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); | |
2845 | outrel.r_addend = relocation; | |
2846 | elf_append_rela (output_bfd, s, &outrel); | |
2847 | } | |
2848 | ||
c434dee6 AJ |
2849 | if (off >= (bfd_vma) -2) |
2850 | abort (); | |
2851 | ||
7b81dfbb AJ |
2852 | relocation = base_got->output_section->vma |
2853 | + base_got->output_offset + off; | |
56ceb5b5 L |
2854 | if (r_type != R_X86_64_GOTPCREL |
2855 | && r_type != R_X86_64_GOTPCRELX | |
2856 | && r_type != R_X86_64_REX_GOTPCRELX | |
2857 | && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
2858 | relocation -= htab->elf.sgotplt->output_section->vma |
2859 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 2860 | |
70256ad8 AJ |
2861 | break; |
2862 | ||
d6ab8113 JB |
2863 | case R_X86_64_GOTOFF64: |
2864 | /* Relocation is relative to the start of the global offset | |
2865 | table. */ | |
2866 | ||
3d949995 L |
2867 | /* Check to make sure it isn't a protected function or data |
2868 | symbol for shared library since it may not be local when | |
e3c0e327 L |
2869 | used as function address or with copy relocation. We also |
2870 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 2871 | if (bfd_link_pic (info) && h) |
d6ab8113 | 2872 | { |
e3c0e327 L |
2873 | if (!h->def_regular) |
2874 | { | |
2875 | const char *v; | |
2876 | ||
2877 | switch (ELF_ST_VISIBILITY (h->other)) | |
2878 | { | |
2879 | case STV_HIDDEN: | |
2880 | v = _("hidden symbol"); | |
2881 | break; | |
2882 | case STV_INTERNAL: | |
2883 | v = _("internal symbol"); | |
2884 | break; | |
2885 | case STV_PROTECTED: | |
2886 | v = _("protected symbol"); | |
2887 | break; | |
2888 | default: | |
2889 | v = _("symbol"); | |
2890 | break; | |
2891 | } | |
2892 | ||
4eca0228 | 2893 | _bfd_error_handler |
695344c0 | 2894 | /* xgettext:c-format */ |
871b3ab2 | 2895 | (_("%pB: relocation R_X86_64_GOTOFF64 against undefined %s" |
63a5468a | 2896 | " `%s' can not be used when making a shared object"), |
e3c0e327 L |
2897 | input_bfd, v, h->root.root.string); |
2898 | bfd_set_error (bfd_error_bad_value); | |
2899 | return FALSE; | |
2900 | } | |
0e1862bb | 2901 | else if (!bfd_link_executable (info) |
6999821f | 2902 | && !SYMBOL_REFERENCES_LOCAL_P (info, h) |
e3c0e327 L |
2903 | && (h->type == STT_FUNC |
2904 | || h->type == STT_OBJECT) | |
2905 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
2906 | { | |
4eca0228 | 2907 | _bfd_error_handler |
695344c0 | 2908 | /* xgettext:c-format */ |
871b3ab2 | 2909 | (_("%pB: relocation R_X86_64_GOTOFF64 against protected %s" |
63a5468a | 2910 | " `%s' can not be used when making a shared object"), |
e3c0e327 L |
2911 | input_bfd, |
2912 | h->type == STT_FUNC ? "function" : "data", | |
2913 | h->root.root.string); | |
2914 | bfd_set_error (bfd_error_bad_value); | |
d6ab8113 | 2915 | return FALSE; |
e3c0e327 | 2916 | } |
d6ab8113 JB |
2917 | } |
2918 | ||
2919 | /* Note that sgot is not involved in this | |
2920 | calculation. We always want the start of .got.plt. If we | |
2921 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
2922 | permitted by the ABI, we might have to change this | |
2923 | calculation. */ | |
6de2ae4a L |
2924 | relocation -= htab->elf.sgotplt->output_section->vma |
2925 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
2926 | break; |
2927 | ||
2928 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2929 | case R_X86_64_GOTPC64: |
d6ab8113 | 2930 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
2931 | relocation = htab->elf.sgotplt->output_section->vma |
2932 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
2933 | unresolved_reloc = FALSE; |
2934 | break; | |
7b81dfbb AJ |
2935 | |
2936 | case R_X86_64_PLTOFF64: | |
2937 | /* Relocation is PLT entry relative to GOT. For local | |
2938 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 2939 | if (h != NULL |
7b81dfbb | 2940 | /* See PLT32 handling. */ |
9d734efa L |
2941 | && (h->plt.offset != (bfd_vma) -1 |
2942 | || eh->plt_got.offset != (bfd_vma) -1) | |
6de2ae4a | 2943 | && htab->elf.splt != NULL) |
7b81dfbb | 2944 | { |
9d734efa L |
2945 | if (eh->plt_got.offset != (bfd_vma) -1) |
2946 | { | |
2947 | /* Use the GOT PLT. */ | |
2948 | resolved_plt = htab->plt_got; | |
2949 | plt_offset = eh->plt_got.offset; | |
2950 | } | |
f2c29a16 | 2951 | else if (htab->plt_second != NULL) |
0ff2b86e | 2952 | { |
f2c29a16 L |
2953 | resolved_plt = htab->plt_second; |
2954 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
2955 | } |
2956 | else | |
2957 | { | |
2958 | resolved_plt = htab->elf.splt; | |
2959 | plt_offset = h->plt.offset; | |
2960 | } | |
2961 | ||
2962 | relocation = (resolved_plt->output_section->vma | |
2963 | + resolved_plt->output_offset | |
2964 | + plt_offset); | |
7b81dfbb AJ |
2965 | unresolved_reloc = FALSE; |
2966 | } | |
2967 | ||
6de2ae4a L |
2968 | relocation -= htab->elf.sgotplt->output_section->vma |
2969 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 2970 | break; |
d6ab8113 | 2971 | |
70256ad8 | 2972 | case R_X86_64_PLT32: |
c3320543 | 2973 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
2974 | /* Relocation is to the entry for this symbol in the |
2975 | procedure linkage table. */ | |
2976 | ||
2977 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 2978 | without using the procedure linkage table. */ |
70256ad8 AJ |
2979 | if (h == NULL) |
2980 | break; | |
2981 | ||
dd7e64d4 L |
2982 | if ((h->plt.offset == (bfd_vma) -1 |
2983 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 2984 | || htab->elf.splt == NULL) |
70256ad8 AJ |
2985 | { |
2986 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
2987 | happens when statically linking PIC code, or when |
2988 | using -Bsymbolic. */ | |
70256ad8 AJ |
2989 | break; |
2990 | } | |
2991 | ||
451875b4 | 2992 | use_plt: |
dd7e64d4 | 2993 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 2994 | { |
f2c29a16 | 2995 | if (htab->plt_second != NULL) |
dd7e64d4 | 2996 | { |
f2c29a16 L |
2997 | resolved_plt = htab->plt_second; |
2998 | plt_offset = eh->plt_second.offset; | |
dd7e64d4 L |
2999 | } |
3000 | else | |
3001 | { | |
3002 | resolved_plt = htab->elf.splt; | |
3003 | plt_offset = h->plt.offset; | |
3004 | } | |
0ff2b86e L |
3005 | } |
3006 | else | |
3007 | { | |
dd7e64d4 L |
3008 | /* Use the GOT PLT. */ |
3009 | resolved_plt = htab->plt_got; | |
3010 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
3011 | } |
3012 | ||
3013 | relocation = (resolved_plt->output_section->vma | |
3014 | + resolved_plt->output_offset | |
3015 | + plt_offset); | |
b34976b6 | 3016 | unresolved_reloc = FALSE; |
70256ad8 AJ |
3017 | break; |
3018 | ||
1788fc08 L |
3019 | case R_X86_64_SIZE32: |
3020 | case R_X86_64_SIZE64: | |
1788fc08 L |
3021 | /* Set to symbol size. */ |
3022 | relocation = st_size; | |
3023 | goto direct; | |
3024 | ||
fd8ab9e5 AJ |
3025 | case R_X86_64_PC8: |
3026 | case R_X86_64_PC16: | |
3027 | case R_X86_64_PC32: | |
c3320543 | 3028 | case R_X86_64_PC32_BND: |
6333bc0d | 3029 | /* Don't complain about -fPIC if the symbol is undefined when |
bd7ab16b L |
3030 | building executable unless it is unresolved weak symbol, |
3031 | references a dynamic definition in PIE or -z nocopyreloc | |
3032 | is used. */ | |
07d6d2b8 | 3033 | if ((input_section->flags & SEC_ALLOC) != 0 |
90f487df | 3034 | && (input_section->flags & SEC_READONLY) != 0 |
6333bc0d | 3035 | && h != NULL |
aec6b87e | 3036 | && ((bfd_link_executable (info) |
7073b5b9 L |
3037 | && ((h->root.type == bfd_link_hash_undefweak |
3038 | && !resolved_to_zero) | |
bd7ab16b L |
3039 | || (bfd_link_pie (info) |
3040 | && !h->def_regular | |
3041 | && h->def_dynamic) | |
a5b4ee94 L |
3042 | || ((info->nocopyreloc |
3043 | || (eh->def_protected | |
3044 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
3045 | && h->def_dynamic |
3046 | && !(h->root.u.def.section->flags & SEC_CODE)))) | |
c5bb8910 | 3047 | || bfd_link_dll (info))) |
6610a52d | 3048 | { |
41bed6dd | 3049 | bfd_boolean fail = FALSE; |
6999821f | 3050 | if (SYMBOL_REFERENCES_LOCAL_P (info, h)) |
41bed6dd L |
3051 | { |
3052 | /* Symbol is referenced locally. Make sure it is | |
bd7ab16b L |
3053 | defined locally. */ |
3054 | fail = !(h->def_regular || ELF_COMMON_DEF_P (h)); | |
41bed6dd | 3055 | } |
aec6b87e | 3056 | else if (!(bfd_link_pie (info) |
bc696fd5 | 3057 | && (h->needs_copy || eh->needs_copy))) |
41bed6dd | 3058 | { |
9a926d55 | 3059 | /* Symbol doesn't need copy reloc and isn't referenced |
bd7ab16b L |
3060 | locally. Address of protected function may not be |
3061 | reachable at run-time. */ | |
3062 | fail = (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3063 | || (ELF_ST_VISIBILITY (h->other) == STV_PROTECTED | |
3064 | && h->type == STT_FUNC)); | |
41bed6dd L |
3065 | } |
3066 | ||
3067 | if (fail) | |
aab921ad | 3068 | return elf_x86_64_need_pic (info, input_bfd, input_section, |
338c190a | 3069 | h, NULL, NULL, howto); |
6610a52d | 3070 | } |
451875b4 L |
3071 | /* Since x86-64 has PC-relative PLT, we can use PLT in PIE |
3072 | as function address. */ | |
3073 | else if (h != NULL | |
3074 | && (input_section->flags & SEC_CODE) == 0 | |
3075 | && bfd_link_pie (info) | |
3076 | && h->type == STT_FUNC | |
3077 | && !h->def_regular | |
3078 | && h->def_dynamic) | |
3079 | goto use_plt; | |
6610a52d L |
3080 | /* Fall through. */ |
3081 | ||
70256ad8 AJ |
3082 | case R_X86_64_8: |
3083 | case R_X86_64_16: | |
3084 | case R_X86_64_32: | |
d6ab8113 | 3085 | case R_X86_64_PC64: |
6b3db546 | 3086 | case R_X86_64_64: |
80643fbc | 3087 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 3088 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 3089 | |
1788fc08 | 3090 | direct: |
b1e24c02 | 3091 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
3092 | break; |
3093 | ||
aebcc8ff L |
3094 | need_copy_reloc_in_pie = (bfd_link_pie (info) |
3095 | && h != NULL | |
3096 | && (h->needs_copy | |
3097 | || eh->needs_copy | |
3098 | || (h->root.type | |
3099 | == bfd_link_hash_undefined)) | |
3100 | && (X86_PCREL_TYPE_P (r_type) | |
3101 | || X86_SIZE_TYPE_P (r_type))); | |
3102 | ||
3103 | if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type, | |
3104 | need_copy_reloc_in_pie, | |
3105 | resolved_to_zero, FALSE)) | |
70256ad8 AJ |
3106 | { |
3107 | Elf_Internal_Rela outrel; | |
b34976b6 | 3108 | bfd_boolean skip, relocate; |
c434dee6 | 3109 | asection *sreloc; |
70256ad8 AJ |
3110 | |
3111 | /* When generating a shared object, these relocations | |
3112 | are copied into the output file to be resolved at run | |
407443a3 | 3113 | time. */ |
b34976b6 AM |
3114 | skip = FALSE; |
3115 | relocate = FALSE; | |
70256ad8 | 3116 | |
c629eae0 JJ |
3117 | outrel.r_offset = |
3118 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 3119 | rel->r_offset); |
c629eae0 | 3120 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 3121 | skip = TRUE; |
0fb19cbc | 3122 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 3123 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
3124 | |
3125 | outrel.r_offset += (input_section->output_section->vma | |
3126 | + input_section->output_offset); | |
3127 | ||
3128 | if (skip) | |
0bb2d96a | 3129 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 3130 | |
e74399c4 | 3131 | else if (COPY_INPUT_RELOC_P (info, h, r_type)) |
70256ad8 | 3132 | { |
351f65ca | 3133 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 3134 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
3135 | } |
3136 | else | |
3137 | { | |
4c10bbaa L |
3138 | /* This symbol is local, or marked to become local. |
3139 | When relocation overflow check is disabled, we | |
3140 | convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
3141 | if (r_type == htab->pointer_r_type | |
3142 | || (r_type == R_X86_64_32 | |
3143 | && info->no_reloc_overflow_check)) | |
607c0e09 | 3144 | { |
b34976b6 | 3145 | relocate = TRUE; |
351f65ca | 3146 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
3147 | outrel.r_addend = relocation + rel->r_addend; |
3148 | } | |
64d25c44 L |
3149 | else if (r_type == R_X86_64_64 |
3150 | && !ABI_64_P (output_bfd)) | |
3151 | { | |
3152 | relocate = TRUE; | |
3153 | outrel.r_info = htab->r_info (0, | |
3154 | R_X86_64_RELATIVE64); | |
3155 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
3156 | /* Check addend overflow. */ |
3157 | if ((outrel.r_addend & 0x80000000) | |
3158 | != (rel->r_addend & 0x80000000)) | |
3159 | { | |
3160 | const char *name; | |
268a8d3a | 3161 | int addend = rel->r_addend; |
8cf0d2dd L |
3162 | if (h && h->root.root.string) |
3163 | name = h->root.root.string; | |
3164 | else | |
3165 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3166 | sym, NULL); | |
d42c267e AM |
3167 | _bfd_error_handler |
3168 | /* xgettext:c-format */ | |
871b3ab2 | 3169 | (_("%pB: addend %s%#x in relocation %s against " |
2dcf00ce AM |
3170 | "symbol `%s' at %#" PRIx64 |
3171 | " in section `%pA' is out of range"), | |
d42c267e | 3172 | input_bfd, addend < 0 ? "-" : "", addend, |
2dcf00ce AM |
3173 | howto->name, name, (uint64_t) rel->r_offset, |
3174 | input_section); | |
8cf0d2dd L |
3175 | bfd_set_error (bfd_error_bad_value); |
3176 | return FALSE; | |
3177 | } | |
64d25c44 | 3178 | } |
607c0e09 AS |
3179 | else |
3180 | { | |
3181 | long sindx; | |
3182 | ||
8517fae7 | 3183 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
3184 | sindx = 0; |
3185 | else if (sec == NULL || sec->owner == NULL) | |
3186 | { | |
3187 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3188 | return FALSE; |
607c0e09 AS |
3189 | } |
3190 | else | |
3191 | { | |
3192 | asection *osec; | |
3193 | ||
74541ad4 AM |
3194 | /* We are turning this relocation into one |
3195 | against a section symbol. It would be | |
3196 | proper to subtract the symbol's value, | |
3197 | osec->vma, from the emitted reloc addend, | |
3198 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
3199 | osec = sec->output_section; |
3200 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
3201 | if (sindx == 0) |
3202 | { | |
3203 | asection *oi = htab->elf.text_index_section; | |
3204 | sindx = elf_section_data (oi)->dynindx; | |
3205 | } | |
3206 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
3207 | } |
3208 | ||
351f65ca | 3209 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
3210 | outrel.r_addend = relocation + rel->r_addend; |
3211 | } | |
70256ad8 AJ |
3212 | } |
3213 | ||
cbe950e9 | 3214 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 3215 | |
62d78908 L |
3216 | if (sreloc == NULL || sreloc->contents == NULL) |
3217 | { | |
3218 | r = bfd_reloc_notsupported; | |
3219 | goto check_relocation_error; | |
3220 | } | |
c434dee6 | 3221 | |
351f65ca | 3222 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
3223 | |
3224 | /* If this reloc is against an external symbol, we do | |
3225 | not want to fiddle with the addend. Otherwise, we | |
3226 | need to include the symbol value so that it becomes | |
3227 | an addend for the dynamic reloc. */ | |
0f88be7a | 3228 | if (! relocate) |
70256ad8 AJ |
3229 | continue; |
3230 | } | |
3231 | ||
3232 | break; | |
3233 | ||
bffbf940 | 3234 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
3235 | case R_X86_64_GOTPC32_TLSDESC: |
3236 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 3237 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
3238 | tls_type = GOT_UNKNOWN; |
3239 | if (h == NULL && local_got_offsets) | |
0afcef53 | 3240 | tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 3241 | else if (h != NULL) |
0afcef53 | 3242 | tls_type = elf_x86_hash_entry (h)->tls_type; |
142411ca | 3243 | |
419414ea | 3244 | r_type_tls = r_type; |
351f65ca L |
3245 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3246 | input_section, contents, | |
3247 | symtab_hdr, sym_hashes, | |
419414ea | 3248 | &r_type_tls, tls_type, rel, |
bedfd056 | 3249 | relend, h, r_symndx, TRUE)) |
534a31f6 | 3250 | return FALSE; |
bffbf940 | 3251 | |
419414ea | 3252 | if (r_type_tls == R_X86_64_TPOFF32) |
bffbf940 | 3253 | { |
142411ca L |
3254 | bfd_vma roff = rel->r_offset; |
3255 | ||
bffbf940 | 3256 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 3257 | |
419414ea | 3258 | if (r_type == R_X86_64_TLSGD) |
bffbf940 | 3259 | { |
52bc799a | 3260 | /* GD->LE transition. For 64bit, change |
e2cbcd91 L |
3261 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3262 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3263 | or | |
3264 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3265 | .byte 0x66; rex64 | |
3266 | call *__tls_get_addr@GOTPCREL(%rip) | |
3267 | which may be converted to | |
3268 | addr32 call __tls_get_addr | |
52bc799a | 3269 | into: |
e2cbcd91 L |
3270 | movq %fs:0, %rax |
3271 | leaq foo@tpoff(%rax), %rax | |
52bc799a | 3272 | For 32bit, change |
e2cbcd91 L |
3273 | leaq foo@tlsgd(%rip), %rdi |
3274 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3275 | or | |
3276 | leaq foo@tlsgd(%rip), %rdi | |
3277 | .byte 0x66; rex64 | |
3278 | call *__tls_get_addr@GOTPCREL(%rip) | |
3279 | which may be converted to | |
3280 | addr32 call __tls_get_addr | |
52bc799a | 3281 | into: |
e2cbcd91 L |
3282 | movl %fs:0, %eax |
3283 | leaq foo@tpoff(%rax), %rax | |
5c98a14e | 3284 | For largepic, change: |
e2cbcd91 L |
3285 | leaq foo@tlsgd(%rip), %rdi |
3286 | movabsq $__tls_get_addr@pltoff, %rax | |
3287 | addq %r15, %rax | |
3288 | call *%rax | |
5c98a14e | 3289 | into: |
e2cbcd91 L |
3290 | movq %fs:0, %rax |
3291 | leaq foo@tpoff(%rax), %rax | |
3292 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 3293 | int largepic = 0; |
e2cbcd91 | 3294 | if (ABI_64_P (output_bfd)) |
5c98a14e | 3295 | { |
e2cbcd91 L |
3296 | if (contents[roff + 5] == 0xb8) |
3297 | { | |
3298 | memcpy (contents + roff - 3, | |
3299 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
3300 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
3301 | largepic = 1; | |
3302 | } | |
3303 | else | |
3304 | memcpy (contents + roff - 4, | |
3305 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3306 | 16); | |
5c98a14e | 3307 | } |
52bc799a L |
3308 | else |
3309 | memcpy (contents + roff - 3, | |
3310 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3311 | 15); | |
eb4ff4d6 | 3312 | bfd_put_32 (output_bfd, |
351f65ca | 3313 | elf_x86_64_tpoff (info, relocation), |
5c98a14e | 3314 | contents + roff + 8 + largepic); |
e2cbcd91 L |
3315 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, |
3316 | R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */ | |
bffbf940 | 3317 | rel++; |
60f2e42e | 3318 | wrel++; |
bffbf940 JJ |
3319 | continue; |
3320 | } | |
419414ea | 3321 | else if (r_type == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
3322 | { |
3323 | /* GDesc -> LE transition. | |
3324 | It's originally something like: | |
3325 | leaq x@tlsdesc(%rip), %rax | |
3326 | ||
3327 | Change it to: | |
c9736ba0 | 3328 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 3329 | |
c9736ba0 | 3330 | unsigned int val, type; |
67a4f2b7 | 3331 | |
67a4f2b7 | 3332 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 3333 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
3334 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
3335 | contents + roff - 3); | |
3336 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
3337 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3338 | contents + roff - 1); | |
eb4ff4d6 | 3339 | bfd_put_32 (output_bfd, |
351f65ca | 3340 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
3341 | contents + roff); |
3342 | continue; | |
3343 | } | |
419414ea | 3344 | else if (r_type == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
3345 | { |
3346 | /* GDesc -> LE transition. | |
3347 | It's originally: | |
3348 | call *(%rax) | |
3349 | Turn it into: | |
142411ca | 3350 | xchg %ax,%ax. */ |
10efb593 | 3351 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
3352 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3353 | continue; | |
3354 | } | |
419414ea | 3355 | else if (r_type == R_X86_64_GOTTPOFF) |
bffbf940 | 3356 | { |
bffbf940 | 3357 | /* IE->LE transition: |
cf61b747 | 3358 | For 64bit, originally it can be one of: |
bffbf940 JJ |
3359 | movq foo@gottpoff(%rip), %reg |
3360 | addq foo@gottpoff(%rip), %reg | |
3361 | We change it into: | |
3362 | movq $foo, %reg | |
3363 | leaq foo(%reg), %reg | |
cf61b747 L |
3364 | addq $foo, %reg. |
3365 | For 32bit, originally it can be one of: | |
3366 | movq foo@gottpoff(%rip), %reg | |
3367 | addl foo@gottpoff(%rip), %reg | |
3368 | We change it into: | |
3369 | movq $foo, %reg | |
3370 | leal foo(%reg), %reg | |
3371 | addl $foo, %reg. */ | |
142411ca L |
3372 | |
3373 | unsigned int val, type, reg; | |
3374 | ||
cf61b747 L |
3375 | if (roff >= 3) |
3376 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
3377 | else | |
3378 | val = 0; | |
142411ca L |
3379 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
3380 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 3381 | reg >>= 3; |
bffbf940 JJ |
3382 | if (type == 0x8b) |
3383 | { | |
3384 | /* movq */ | |
3385 | if (val == 0x4c) | |
3386 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3387 | contents + roff - 3); |
4a4c5f25 L |
3388 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3389 | bfd_put_8 (output_bfd, 0x41, | |
3390 | contents + roff - 3); | |
bffbf940 | 3391 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 3392 | contents + roff - 2); |
bffbf940 | 3393 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3394 | contents + roff - 1); |
bffbf940 JJ |
3395 | } |
3396 | else if (reg == 4) | |
3397 | { | |
cf61b747 L |
3398 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
3399 | is special */ | |
bffbf940 JJ |
3400 | if (val == 0x4c) |
3401 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3402 | contents + roff - 3); |
4a4c5f25 L |
3403 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3404 | bfd_put_8 (output_bfd, 0x41, | |
3405 | contents + roff - 3); | |
bffbf940 | 3406 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 3407 | contents + roff - 2); |
bffbf940 | 3408 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3409 | contents + roff - 1); |
bffbf940 JJ |
3410 | } |
3411 | else | |
3412 | { | |
cf61b747 | 3413 | /* addq/addl -> leaq/leal */ |
bffbf940 JJ |
3414 | if (val == 0x4c) |
3415 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 3416 | contents + roff - 3); |
4a4c5f25 L |
3417 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3418 | bfd_put_8 (output_bfd, 0x45, | |
3419 | contents + roff - 3); | |
bffbf940 | 3420 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 3421 | contents + roff - 2); |
bffbf940 | 3422 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 3423 | contents + roff - 1); |
bffbf940 | 3424 | } |
eb4ff4d6 | 3425 | bfd_put_32 (output_bfd, |
351f65ca | 3426 | elf_x86_64_tpoff (info, relocation), |
142411ca | 3427 | contents + roff); |
bffbf940 JJ |
3428 | continue; |
3429 | } | |
142411ca L |
3430 | else |
3431 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
3432 | } |
3433 | ||
6de2ae4a | 3434 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3435 | abort (); |
3436 | ||
3437 | if (h != NULL) | |
67a4f2b7 AO |
3438 | { |
3439 | off = h->got.offset; | |
0afcef53 | 3440 | offplt = elf_x86_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 3441 | } |
bffbf940 JJ |
3442 | else |
3443 | { | |
3444 | if (local_got_offsets == NULL) | |
3445 | abort (); | |
3446 | ||
3447 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 3448 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
3449 | } |
3450 | ||
3451 | if ((off & 1) != 0) | |
3452 | off &= ~1; | |
26e41594 | 3453 | else |
bffbf940 JJ |
3454 | { |
3455 | Elf_Internal_Rela outrel; | |
bffbf940 | 3456 | int dr_type, indx; |
67a4f2b7 | 3457 | asection *sreloc; |
bffbf940 | 3458 | |
6de2ae4a | 3459 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3460 | abort (); |
3461 | ||
67a4f2b7 AO |
3462 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3463 | ||
3464 | if (GOT_TLS_GDESC_P (tls_type)) | |
3465 | { | |
351f65ca | 3466 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 3467 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
3468 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
3469 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
3470 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3471 | + offplt |
3472 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 3473 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 3474 | if (indx == 0) |
0afcef53 | 3475 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
67a4f2b7 AO |
3476 | else |
3477 | outrel.r_addend = 0; | |
351f65ca | 3478 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
3479 | } |
3480 | ||
6de2ae4a | 3481 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 3482 | |
6de2ae4a L |
3483 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3484 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 3485 | |
67a4f2b7 | 3486 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 3487 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
3488 | else if (GOT_TLS_GDESC_P (tls_type)) |
3489 | goto dr_done; | |
bffbf940 JJ |
3490 | else |
3491 | dr_type = R_X86_64_TPOFF64; | |
3492 | ||
6de2ae4a | 3493 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 3494 | outrel.r_addend = 0; |
67a4f2b7 AO |
3495 | if ((dr_type == R_X86_64_TPOFF64 |
3496 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
0afcef53 | 3497 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
351f65ca | 3498 | outrel.r_info = htab->r_info (indx, dr_type); |
bffbf940 | 3499 | |
351f65ca | 3500 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 3501 | |
67a4f2b7 | 3502 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
3503 | { |
3504 | if (indx == 0) | |
3505 | { | |
d40d037c | 3506 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 3507 | bfd_put_64 (output_bfd, |
0afcef53 | 3508 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3509 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
3510 | } |
3511 | else | |
3512 | { | |
3513 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3514 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 3515 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
3516 | R_X86_64_DTPOFF64); |
3517 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 3518 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 3519 | &outrel); |
bffbf940 JJ |
3520 | } |
3521 | } | |
3522 | ||
67a4f2b7 | 3523 | dr_done: |
bffbf940 JJ |
3524 | if (h != NULL) |
3525 | h->got.offset |= 1; | |
3526 | else | |
3527 | local_got_offsets[r_symndx] |= 1; | |
3528 | } | |
3529 | ||
67a4f2b7 AO |
3530 | if (off >= (bfd_vma) -2 |
3531 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 3532 | abort (); |
419414ea | 3533 | if (r_type_tls == r_type) |
bffbf940 | 3534 | { |
67a4f2b7 AO |
3535 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
3536 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
3537 | relocation = htab->elf.sgotplt->output_section->vma |
3538 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3539 | + offplt + htab->sgotplt_jump_table_size; |
3540 | else | |
6de2ae4a L |
3541 | relocation = htab->elf.sgot->output_section->vma |
3542 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3543 | unresolved_reloc = FALSE; |
bffbf940 | 3544 | } |
142411ca | 3545 | else |
67a4f2b7 | 3546 | { |
142411ca | 3547 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 3548 | |
419414ea | 3549 | if (r_type == R_X86_64_TLSGD) |
142411ca | 3550 | { |
52bc799a | 3551 | /* GD->IE transition. For 64bit, change |
e2cbcd91 L |
3552 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3553 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3554 | or | |
3555 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3556 | .byte 0x66; rex64 | |
3557 | call *__tls_get_addr@GOTPCREL(%rip | |
3558 | which may be converted to | |
3559 | addr32 call __tls_get_addr | |
52bc799a | 3560 | into: |
e2cbcd91 L |
3561 | movq %fs:0, %rax |
3562 | addq foo@gottpoff(%rip), %rax | |
52bc799a | 3563 | For 32bit, change |
e2cbcd91 L |
3564 | leaq foo@tlsgd(%rip), %rdi |
3565 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
3566 | or | |
3567 | leaq foo@tlsgd(%rip), %rdi | |
3568 | .byte 0x66; rex64; | |
3569 | call *__tls_get_addr@GOTPCREL(%rip) | |
3570 | which may be converted to | |
3571 | addr32 call __tls_get_addr | |
52bc799a | 3572 | into: |
e2cbcd91 L |
3573 | movl %fs:0, %eax |
3574 | addq foo@gottpoff(%rip), %rax | |
5c98a14e | 3575 | For largepic, change: |
e2cbcd91 L |
3576 | leaq foo@tlsgd(%rip), %rdi |
3577 | movabsq $__tls_get_addr@pltoff, %rax | |
3578 | addq %r15, %rax | |
3579 | call *%rax | |
5c98a14e | 3580 | into: |
e2cbcd91 L |
3581 | movq %fs:0, %rax |
3582 | addq foo@gottpoff(%rax), %rax | |
3583 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 3584 | int largepic = 0; |
e2cbcd91 | 3585 | if (ABI_64_P (output_bfd)) |
5c98a14e | 3586 | { |
e2cbcd91 L |
3587 | if (contents[roff + 5] == 0xb8) |
3588 | { | |
3589 | memcpy (contents + roff - 3, | |
3590 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
3591 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
3592 | largepic = 1; | |
3593 | } | |
3594 | else | |
3595 | memcpy (contents + roff - 4, | |
3596 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3597 | 16); | |
5c98a14e | 3598 | } |
52bc799a L |
3599 | else |
3600 | memcpy (contents + roff - 3, | |
3601 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3602 | 15); | |
142411ca | 3603 | |
6de2ae4a L |
3604 | relocation = (htab->elf.sgot->output_section->vma |
3605 | + htab->elf.sgot->output_offset + off | |
142411ca | 3606 | - roff |
5c98a14e | 3607 | - largepic |
142411ca L |
3608 | - input_section->output_section->vma |
3609 | - input_section->output_offset | |
3610 | - 12); | |
3611 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
3612 | contents + roff + 8 + largepic); |
3613 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 3614 | rel++; |
60f2e42e | 3615 | wrel++; |
142411ca L |
3616 | continue; |
3617 | } | |
419414ea | 3618 | else if (r_type == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
3619 | { |
3620 | /* GDesc -> IE transition. | |
3621 | It's originally something like: | |
3622 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 3623 | |
142411ca | 3624 | Change it to: |
c9736ba0 | 3625 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 3626 | |
142411ca L |
3627 | /* Now modify the instruction as appropriate. To |
3628 | turn a leaq into a movq in the form we use it, it | |
3629 | suffices to change the second byte from 0x8d to | |
3630 | 0x8b. */ | |
3631 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
3632 | ||
3633 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
3634 | htab->elf.sgot->output_section->vma |
3635 | + htab->elf.sgot->output_offset + off | |
142411ca L |
3636 | - rel->r_offset |
3637 | - input_section->output_section->vma | |
3638 | - input_section->output_offset | |
3639 | - 4, | |
3640 | contents + roff); | |
3641 | continue; | |
3642 | } | |
419414ea | 3643 | else if (r_type == R_X86_64_TLSDESC_CALL) |
142411ca L |
3644 | { |
3645 | /* GDesc -> IE transition. | |
3646 | It's originally: | |
3647 | call *(%rax) | |
3648 | ||
3649 | Change it to: | |
c9736ba0 | 3650 | xchg %ax, %ax. */ |
142411ca | 3651 | |
142411ca L |
3652 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
3653 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
3654 | continue; | |
3655 | } | |
3656 | else | |
3657 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 3658 | } |
bffbf940 JJ |
3659 | break; |
3660 | ||
3661 | case R_X86_64_TLSLD: | |
351f65ca L |
3662 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3663 | input_section, contents, | |
3664 | symtab_hdr, sym_hashes, | |
bedfd056 L |
3665 | &r_type, GOT_UNKNOWN, rel, |
3666 | relend, h, r_symndx, TRUE)) | |
142411ca | 3667 | return FALSE; |
a3fadc9a | 3668 | |
142411ca L |
3669 | if (r_type != R_X86_64_TLSLD) |
3670 | { | |
bffbf940 | 3671 | /* LD->LE transition: |
e2cbcd91 L |
3672 | leaq foo@tlsld(%rip), %rdi |
3673 | call __tls_get_addr@PLT | |
3674 | For 64bit, we change it into: | |
3675 | .word 0x6666; .byte 0x66; movq %fs:0, %rax | |
3676 | For 32bit, we change it into: | |
3677 | nopl 0x0(%rax); movl %fs:0, %eax | |
3678 | Or | |
3679 | leaq foo@tlsld(%rip), %rdi; | |
3680 | call *__tls_get_addr@GOTPCREL(%rip) | |
3681 | which may be converted to | |
3682 | addr32 call __tls_get_addr | |
52bc799a | 3683 | For 64bit, we change it into: |
e2cbcd91 | 3684 | .word 0x6666; .word 0x6666; movq %fs:0, %rax |
52bc799a | 3685 | For 32bit, we change it into: |
e2cbcd91 | 3686 | nopw 0x0(%rax); movl %fs:0, %eax |
5c98a14e | 3687 | For largepic, change: |
e2cbcd91 L |
3688 | leaq foo@tlsgd(%rip), %rdi |
3689 | movabsq $__tls_get_addr@pltoff, %rax | |
3690 | addq %rbx, %rax | |
3691 | call *%rax | |
3692 | into | |
3693 | data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
3694 | movq %fs:0, %eax */ | |
142411ca L |
3695 | |
3696 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
e2cbcd91 L |
3697 | if (ABI_64_P (output_bfd)) |
3698 | { | |
3699 | if (contents[rel->r_offset + 5] == 0xb8) | |
3700 | memcpy (contents + rel->r_offset - 3, | |
3701 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
3702 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
3703 | else if (contents[rel->r_offset + 4] == 0xff | |
3704 | || contents[rel->r_offset + 4] == 0x67) | |
3705 | memcpy (contents + rel->r_offset - 3, | |
3706 | "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", | |
3707 | 13); | |
3708 | else | |
3709 | memcpy (contents + rel->r_offset - 3, | |
3710 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
3711 | } | |
52bc799a | 3712 | else |
e2cbcd91 L |
3713 | { |
3714 | if (contents[rel->r_offset + 4] == 0xff) | |
3715 | memcpy (contents + rel->r_offset - 3, | |
3716 | "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", | |
3717 | 13); | |
3718 | else | |
3719 | memcpy (contents + rel->r_offset - 3, | |
3720 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
3721 | } | |
3722 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX | |
3723 | and R_X86_64_PLTOFF64. */ | |
bffbf940 | 3724 | rel++; |
60f2e42e | 3725 | wrel++; |
bffbf940 JJ |
3726 | continue; |
3727 | } | |
3728 | ||
6de2ae4a | 3729 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3730 | abort (); |
3731 | ||
0afcef53 | 3732 | off = htab->tls_ld_or_ldm_got.offset; |
bffbf940 JJ |
3733 | if (off & 1) |
3734 | off &= ~1; | |
3735 | else | |
3736 | { | |
3737 | Elf_Internal_Rela outrel; | |
bffbf940 | 3738 | |
6de2ae4a | 3739 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3740 | abort (); |
3741 | ||
6de2ae4a L |
3742 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3743 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
3744 | |
3745 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3746 | htab->elf.sgot->contents + off); |
bffbf940 | 3747 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 3748 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 3749 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 3750 | outrel.r_addend = 0; |
351f65ca | 3751 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 3752 | &outrel); |
0afcef53 | 3753 | htab->tls_ld_or_ldm_got.offset |= 1; |
bffbf940 | 3754 | } |
6de2ae4a L |
3755 | relocation = htab->elf.sgot->output_section->vma |
3756 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3757 | unresolved_reloc = FALSE; |
bffbf940 JJ |
3758 | break; |
3759 | ||
3760 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
3761 | if (!bfd_link_executable (info) |
3762 | || (input_section->flags & SEC_CODE) == 0) | |
0afcef53 | 3763 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
bffbf940 | 3764 | else |
351f65ca | 3765 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
3766 | break; |
3767 | ||
3768 | case R_X86_64_TPOFF32: | |
6769d501 | 3769 | case R_X86_64_TPOFF64: |
0e1862bb | 3770 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 3771 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
3772 | break; |
3773 | ||
a69ed7f7 L |
3774 | case R_X86_64_DTPOFF64: |
3775 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
0afcef53 | 3776 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
a69ed7f7 L |
3777 | break; |
3778 | ||
70256ad8 AJ |
3779 | default: |
3780 | break; | |
3781 | } | |
8d88c4ca | 3782 | |
239e1f3a AM |
3783 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3784 | because such sections are not SEC_ALLOC and thus ld.so will | |
3785 | not process them. */ | |
c434dee6 | 3786 | if (unresolved_reloc |
239e1f3a | 3787 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
3788 | && h->def_dynamic) |
3789 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
3790 | rel->r_offset) != (bfd_vma) -1) | |
a040981f | 3791 | { |
7073b5b9 L |
3792 | switch (r_type) |
3793 | { | |
3794 | case R_X86_64_32S: | |
a5b4ee94 L |
3795 | sec = h->root.u.def.section; |
3796 | if ((info->nocopyreloc | |
3797 | || (eh->def_protected | |
3798 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
3799 | && !(h->root.u.def.section->flags & SEC_CODE)) |
3800 | return elf_x86_64_need_pic (info, input_bfd, input_section, | |
3801 | h, NULL, NULL, howto); | |
3802 | /* Fall through. */ | |
3803 | ||
3804 | default: | |
3805 | _bfd_error_handler | |
3806 | /* xgettext:c-format */ | |
2dcf00ce AM |
3807 | (_("%pB(%pA+%#" PRIx64 "): " |
3808 | "unresolvable %s relocation against symbol `%s'"), | |
7073b5b9 L |
3809 | input_bfd, |
3810 | input_section, | |
2dcf00ce | 3811 | (uint64_t) rel->r_offset, |
7073b5b9 L |
3812 | howto->name, |
3813 | h->root.root.string); | |
3814 | return FALSE; | |
3815 | } | |
a040981f | 3816 | } |
c434dee6 | 3817 | |
cbe950e9 | 3818 | do_relocation: |
8d88c4ca | 3819 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
3820 | contents, rel->r_offset, |
3821 | relocation, rel->r_addend); | |
8d88c4ca | 3822 | |
62d78908 | 3823 | check_relocation_error: |
8d88c4ca | 3824 | if (r != bfd_reloc_ok) |
8da6118f | 3825 | { |
c434dee6 AJ |
3826 | const char *name; |
3827 | ||
3828 | if (h != NULL) | |
3829 | name = h->root.root.string; | |
3830 | else | |
8da6118f | 3831 | { |
c434dee6 AJ |
3832 | name = bfd_elf_string_from_elf_section (input_bfd, |
3833 | symtab_hdr->sh_link, | |
3834 | sym->st_name); | |
3835 | if (name == NULL) | |
b34976b6 | 3836 | return FALSE; |
c434dee6 AJ |
3837 | if (*name == '\0') |
3838 | name = bfd_section_name (input_bfd, sec); | |
3839 | } | |
3840 | ||
3841 | if (r == bfd_reloc_overflow) | |
8b43e456 | 3842 | { |
78984959 | 3843 | if (converted_reloc) |
8b43e456 L |
3844 | { |
3845 | info->callbacks->einfo | |
3846 | (_("%F%P: failed to convert GOTPCREL relocation; relink with --no-relax\n")); | |
3847 | return FALSE; | |
3848 | } | |
3849 | (*info->callbacks->reloc_overflow) | |
3850 | (info, (h ? &h->root : NULL), name, howto->name, | |
3851 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
3852 | } | |
c434dee6 AJ |
3853 | else |
3854 | { | |
4eca0228 | 3855 | _bfd_error_handler |
695344c0 | 3856 | /* xgettext:c-format */ |
2dcf00ce | 3857 | (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"), |
d003868e | 3858 | input_bfd, input_section, |
2dcf00ce | 3859 | (uint64_t) rel->r_offset, name, (int) r); |
b34976b6 | 3860 | return FALSE; |
8da6118f KH |
3861 | } |
3862 | } | |
60f2e42e L |
3863 | |
3864 | if (wrel != rel) | |
3865 | *wrel = *rel; | |
3866 | } | |
3867 | ||
3868 | if (wrel != rel) | |
3869 | { | |
3870 | Elf_Internal_Shdr *rel_hdr; | |
3871 | size_t deleted = rel - wrel; | |
3872 | ||
3873 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
3874 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
3875 | if (rel_hdr->sh_size == 0) | |
3876 | { | |
3877 | /* It is too late to remove an empty reloc section. Leave | |
3878 | one NONE reloc. | |
3879 | ??? What is wrong with an empty section??? */ | |
3880 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
3881 | deleted -= 1; | |
3882 | } | |
3883 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
3884 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
3885 | input_section->reloc_count -= deleted; | |
8d88c4ca | 3886 | } |
70256ad8 | 3887 | |
b34976b6 | 3888 | return TRUE; |
70256ad8 AJ |
3889 | } |
3890 | ||
3891 | /* Finish up dynamic symbol handling. We set the contents of various | |
3892 | dynamic sections here. */ | |
3893 | ||
b34976b6 | 3894 | static bfd_boolean |
351f65ca L |
3895 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
3896 | struct bfd_link_info *info, | |
3897 | struct elf_link_hash_entry *h, | |
aec6b87e | 3898 | Elf_Internal_Sym *sym) |
70256ad8 | 3899 | { |
0afcef53 | 3900 | struct elf_x86_link_hash_table *htab; |
f2c29a16 | 3901 | bfd_boolean use_plt_second; |
0afcef53 | 3902 | struct elf_x86_link_hash_entry *eh; |
aec6b87e | 3903 | bfd_boolean local_undefweak; |
70256ad8 | 3904 | |
0afcef53 | 3905 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
3906 | if (htab == NULL) |
3907 | return FALSE; | |
70256ad8 | 3908 | |
f2c29a16 L |
3909 | /* Use the second PLT section only if there is .plt section. */ |
3910 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
0ff2b86e | 3911 | |
0afcef53 | 3912 | eh = (struct elf_x86_link_hash_entry *) h; |
9e9821dd L |
3913 | if (eh->no_finish_dynamic_symbol) |
3914 | abort (); | |
dd7e64d4 | 3915 | |
aec6b87e L |
3916 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
3917 | resolved undefined weak symbols in executable so that their | |
3918 | references have value 0 at run-time. */ | |
c5bce5c6 | 3919 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); |
aec6b87e | 3920 | |
70256ad8 AJ |
3921 | if (h->plt.offset != (bfd_vma) -1) |
3922 | { | |
70256ad8 | 3923 | bfd_vma plt_index; |
38b12349 | 3924 | bfd_vma got_offset, plt_offset; |
70256ad8 | 3925 | Elf_Internal_Rela rela; |
947216bf | 3926 | bfd_byte *loc; |
0ff2b86e | 3927 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 3928 | const struct elf_backend_data *bed; |
5974eba6 | 3929 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
3930 | |
3931 | /* When building a static executable, use .iplt, .igot.plt and | |
3932 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 3933 | if (htab->elf.splt != NULL) |
cbe950e9 | 3934 | { |
6de2ae4a L |
3935 | plt = htab->elf.splt; |
3936 | gotplt = htab->elf.sgotplt; | |
3937 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
3938 | } |
3939 | else | |
3940 | { | |
6de2ae4a L |
3941 | plt = htab->elf.iplt; |
3942 | gotplt = htab->elf.igotplt; | |
3943 | relplt = htab->elf.irelplt; | |
cbe950e9 | 3944 | } |
70256ad8 | 3945 | |
f3180fa9 | 3946 | VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak) |
70256ad8 AJ |
3947 | |
3948 | /* Get the index in the procedure linkage table which | |
3949 | corresponds to this symbol. This is the index of this symbol | |
3950 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 3951 | first entry in the procedure linkage table is reserved. |
6bbec505 | 3952 | |
cbe950e9 | 3953 | Get the offset into the .got table of the entry that |
407443a3 | 3954 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
3955 | bytes. The first three are reserved for the dynamic linker. |
3956 | ||
3957 | For static executables, we don't reserve anything. */ | |
3958 | ||
6de2ae4a | 3959 | if (plt == htab->elf.splt) |
cbe950e9 | 3960 | { |
765e526c L |
3961 | got_offset = (h->plt.offset / htab->plt.plt_entry_size |
3962 | - htab->plt.has_plt0); | |
e1f98742 | 3963 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
3964 | } |
3965 | else | |
3966 | { | |
765e526c | 3967 | got_offset = h->plt.offset / htab->plt.plt_entry_size; |
e1f98742 | 3968 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 3969 | } |
70256ad8 | 3970 | |
38b12349 | 3971 | /* Fill in the entry in the procedure linkage table. */ |
765e526c L |
3972 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, |
3973 | htab->plt.plt_entry_size); | |
f2c29a16 | 3974 | if (use_plt_second) |
0ff2b86e | 3975 | { |
f2c29a16 | 3976 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
765e526c L |
3977 | htab->non_lazy_plt->plt_entry, |
3978 | htab->non_lazy_plt->plt_entry_size); | |
0ff2b86e | 3979 | |
f2c29a16 L |
3980 | resolved_plt = htab->plt_second; |
3981 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
3982 | } |
3983 | else | |
3984 | { | |
0ff2b86e L |
3985 | resolved_plt = plt; |
3986 | plt_offset = h->plt.offset; | |
3987 | } | |
eed180f8 RM |
3988 | |
3989 | /* Insert the relocation positions of the plt section. */ | |
3990 | ||
3991 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
3992 | subtracting the size of that instruction. */ | |
ab7fede8 L |
3993 | plt_got_pcrel_offset = (gotplt->output_section->vma |
3994 | + gotplt->output_offset | |
3995 | + got_offset | |
3996 | - resolved_plt->output_section->vma | |
3997 | - resolved_plt->output_offset | |
3998 | - plt_offset | |
765e526c | 3999 | - htab->plt.plt_got_insn_size); |
ab7fede8 L |
4000 | |
4001 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 4002 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
695344c0 | 4003 | /* xgettext:c-format */ |
871b3ab2 | 4004 | info->callbacks->einfo (_("%F%pB: PC-relative offset overflow in PLT entry for `%s'\n"), |
ab7fede8 L |
4005 | output_bfd, h->root.root.string); |
4006 | ||
4007 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
38b12349 | 4008 | (resolved_plt->contents + plt_offset |
765e526c | 4009 | + htab->plt.plt_got_offset)); |
cbe950e9 | 4010 | |
653165cc | 4011 | /* Fill in the entry in the global offset table, initially this |
aec6b87e L |
4012 | points to the second part of the PLT entry. Leave the entry |
4013 | as zero for undefined weak symbol in PIE. No PLT relocation | |
4014 | against undefined weak symbol in PIE. */ | |
4015 | if (!local_undefweak) | |
cbe950e9 | 4016 | { |
765e526c | 4017 | if (htab->plt.has_plt0) |
38b12349 L |
4018 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4019 | + plt->output_offset | |
4020 | + h->plt.offset | |
765e526c | 4021 | + htab->lazy_plt->plt_lazy_offset), |
38b12349 | 4022 | gotplt->contents + got_offset); |
aec6b87e L |
4023 | |
4024 | /* Fill in the entry in the .rela.plt section. */ | |
4025 | rela.r_offset = (gotplt->output_section->vma | |
4026 | + gotplt->output_offset | |
4027 | + got_offset); | |
cf1070f1 | 4028 | if (PLT_LOCAL_IFUNC_P (info, h)) |
aec6b87e | 4029 | { |
871b3ab2 | 4030 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
4031 | h->root.root.string, |
4032 | h->root.u.def.section->owner); | |
4033 | ||
aec6b87e L |
4034 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
4035 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
4036 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); | |
4037 | rela.r_addend = (h->root.u.def.value | |
4038 | + h->root.u.def.section->output_section->vma | |
4039 | + h->root.u.def.section->output_offset); | |
4040 | /* R_X86_64_IRELATIVE comes last. */ | |
4041 | plt_index = htab->next_irelative_index--; | |
4042 | } | |
4043 | else | |
4044 | { | |
4045 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); | |
4046 | rela.r_addend = 0; | |
4047 | plt_index = htab->next_jump_slot_index++; | |
4048 | } | |
e1f98742 | 4049 | |
38b12349 L |
4050 | /* Don't fill the second and third slots in PLT entry for |
4051 | static executables nor without PLT0. */ | |
765e526c | 4052 | if (plt == htab->elf.splt && htab->plt.has_plt0) |
aec6b87e | 4053 | { |
38b12349 | 4054 | bfd_vma plt0_offset |
765e526c | 4055 | = h->plt.offset + htab->lazy_plt->plt_plt_insn_end; |
aec6b87e L |
4056 | |
4057 | /* Put relocation index. */ | |
4058 | bfd_put_32 (output_bfd, plt_index, | |
4059 | (plt->contents + h->plt.offset | |
765e526c | 4060 | + htab->lazy_plt->plt_reloc_offset)); |
aec6b87e L |
4061 | |
4062 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
4063 | check relocation index for overflow since branch displacement | |
4064 | will overflow first. */ | |
4065 | if (plt0_offset > 0x80000000) | |
695344c0 | 4066 | /* xgettext:c-format */ |
871b3ab2 | 4067 | info->callbacks->einfo (_("%F%pB: branch displacement overflow in PLT entry for `%s'\n"), |
aec6b87e L |
4068 | output_bfd, h->root.root.string); |
4069 | bfd_put_32 (output_bfd, - plt0_offset, | |
38b12349 | 4070 | (plt->contents + h->plt.offset |
765e526c | 4071 | + htab->lazy_plt->plt_plt_offset)); |
aec6b87e | 4072 | } |
351f65ca | 4073 | |
aec6b87e L |
4074 | bed = get_elf_backend_data (output_bfd); |
4075 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
4076 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
4077 | } | |
dd7e64d4 L |
4078 | } |
4079 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
4080 | { | |
38b12349 | 4081 | bfd_vma got_offset, plt_offset; |
dd7e64d4 L |
4082 | asection *plt, *got; |
4083 | bfd_boolean got_after_plt; | |
4084 | int32_t got_pcrel_offset; | |
dd7e64d4 L |
4085 | |
4086 | /* Set the entry in the GOT procedure linkage table. */ | |
4087 | plt = htab->plt_got; | |
4088 | got = htab->elf.sgot; | |
4089 | got_offset = h->got.offset; | |
4090 | ||
4091 | if (got_offset == (bfd_vma) -1 | |
e492d2f8 | 4092 | || (h->type == STT_GNU_IFUNC && h->def_regular) |
dd7e64d4 L |
4093 | || plt == NULL |
4094 | || got == NULL) | |
4095 | abort (); | |
70256ad8 | 4096 | |
38b12349 | 4097 | /* Use the non-lazy PLT entry template for the GOT PLT since they |
dd7e64d4 | 4098 | are the identical. */ |
dd7e64d4 L |
4099 | /* Fill in the entry in the GOT procedure linkage table. */ |
4100 | plt_offset = eh->plt_got.offset; | |
4101 | memcpy (plt->contents + plt_offset, | |
765e526c L |
4102 | htab->non_lazy_plt->plt_entry, |
4103 | htab->non_lazy_plt->plt_entry_size); | |
dd7e64d4 L |
4104 | |
4105 | /* Put offset the PC-relative instruction referring to the GOT | |
4106 | entry, subtracting the size of that instruction. */ | |
4107 | got_pcrel_offset = (got->output_section->vma | |
4108 | + got->output_offset | |
4109 | + got_offset | |
4110 | - plt->output_section->vma | |
4111 | - plt->output_offset | |
4112 | - plt_offset | |
765e526c | 4113 | - htab->non_lazy_plt->plt_got_insn_size); |
dd7e64d4 L |
4114 | |
4115 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
4116 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
4117 | if ((got_after_plt && got_pcrel_offset < 0) | |
4118 | || (!got_after_plt && got_pcrel_offset > 0)) | |
695344c0 | 4119 | /* xgettext:c-format */ |
871b3ab2 | 4120 | info->callbacks->einfo (_("%F%pB: PC-relative offset overflow in GOT PLT entry for `%s'\n"), |
dd7e64d4 L |
4121 | output_bfd, h->root.root.string); |
4122 | ||
4123 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
38b12349 | 4124 | (plt->contents + plt_offset |
765e526c | 4125 | + htab->non_lazy_plt->plt_got_offset)); |
dd7e64d4 L |
4126 | } |
4127 | ||
aec6b87e L |
4128 | if (!local_undefweak |
4129 | && !h->def_regular | |
dd7e64d4 L |
4130 | && (h->plt.offset != (bfd_vma) -1 |
4131 | || eh->plt_got.offset != (bfd_vma) -1)) | |
4132 | { | |
4133 | /* Mark the symbol as undefined, rather than as defined in | |
4134 | the .plt section. Leave the value if there were any | |
4135 | relocations where pointer equality matters (this is a clue | |
4136 | for the dynamic linker, to make function pointer | |
4137 | comparisons work between an application and shared | |
4138 | library), otherwise set it to zero. If a function is only | |
4139 | called from a binary, there is no need to slow down | |
4140 | shared libraries because of that. */ | |
4141 | sym->st_shndx = SHN_UNDEF; | |
4142 | if (!h->pointer_equality_needed) | |
4143 | sym->st_value = 0; | |
70256ad8 AJ |
4144 | } |
4145 | ||
aec6b87e L |
4146 | /* Don't generate dynamic GOT relocation against undefined weak |
4147 | symbol in executable. */ | |
bffbf940 | 4148 | if (h->got.offset != (bfd_vma) -1 |
0afcef53 L |
4149 | && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h)->tls_type) |
4150 | && elf_x86_hash_entry (h)->tls_type != GOT_TLS_IE | |
aec6b87e | 4151 | && !local_undefweak) |
053579d7 | 4152 | { |
053579d7 | 4153 | Elf_Internal_Rela rela; |
233cc9c1 | 4154 | asection *relgot = htab->elf.srelgot; |
053579d7 AJ |
4155 | |
4156 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 4157 | up. */ |
6de2ae4a | 4158 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 4159 | abort (); |
053579d7 | 4160 | |
6de2ae4a L |
4161 | rela.r_offset = (htab->elf.sgot->output_section->vma |
4162 | + htab->elf.sgot->output_offset | |
dc810e39 | 4163 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
4164 | |
4165 | /* If this is a static link, or it is a -Bsymbolic link and the | |
4166 | symbol is defined locally or was forced to be local because | |
4167 | of a version file, we just want to emit a RELATIVE reloc. | |
4168 | The entry in the global offset table will already have been | |
4169 | initialized in the relocate_section function. */ | |
710ab287 | 4170 | if (h->def_regular |
0018b0a3 L |
4171 | && h->type == STT_GNU_IFUNC) |
4172 | { | |
233cc9c1 L |
4173 | if (h->plt.offset == (bfd_vma) -1) |
4174 | { | |
4175 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
4176 | if (htab->elf.splt == NULL) | |
4177 | { | |
4178 | /* use .rel[a].iplt section to store .got relocations | |
4179 | in static executable. */ | |
4180 | relgot = htab->elf.irelplt; | |
4181 | } | |
6999821f | 4182 | if (SYMBOL_REFERENCES_LOCAL_P (info, h)) |
233cc9c1 | 4183 | { |
871b3ab2 | 4184 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
4185 | h->root.root.string, |
4186 | h->root.u.def.section->owner); | |
4187 | ||
233cc9c1 L |
4188 | rela.r_info = htab->r_info (0, |
4189 | R_X86_64_IRELATIVE); | |
4190 | rela.r_addend = (h->root.u.def.value | |
4191 | + h->root.u.def.section->output_section->vma | |
4192 | + h->root.u.def.section->output_offset); | |
4193 | } | |
4194 | else | |
4195 | goto do_glob_dat; | |
4196 | } | |
4197 | else if (bfd_link_pic (info)) | |
710ab287 L |
4198 | { |
4199 | /* Generate R_X86_64_GLOB_DAT. */ | |
4200 | goto do_glob_dat; | |
4201 | } | |
4202 | else | |
4203 | { | |
90d60710 | 4204 | asection *plt; |
aab82f4c | 4205 | bfd_vma plt_offset; |
90d60710 | 4206 | |
710ab287 L |
4207 | if (!h->pointer_equality_needed) |
4208 | abort (); | |
4209 | ||
4210 | /* For non-shared object, we can't use .got.plt, which | |
4211 | contains the real function addres if we need pointer | |
4212 | equality. We load the GOT entry with the PLT entry. */ | |
f2c29a16 | 4213 | if (htab->plt_second != NULL) |
aab82f4c | 4214 | { |
f2c29a16 L |
4215 | plt = htab->plt_second; |
4216 | plt_offset = eh->plt_second.offset; | |
aab82f4c L |
4217 | } |
4218 | else | |
4219 | { | |
4220 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
4221 | plt_offset = h->plt.offset; | |
4222 | } | |
710ab287 L |
4223 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4224 | + plt->output_offset | |
aab82f4c | 4225 | + plt_offset), |
6de2ae4a | 4226 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
4227 | return TRUE; |
4228 | } | |
0018b0a3 | 4229 | } |
0e1862bb | 4230 | else if (bfd_link_pic (info) |
6999821f | 4231 | && SYMBOL_REFERENCES_LOCAL_P (info, h)) |
053579d7 | 4232 | { |
ad71ce8d | 4233 | if (!(h->def_regular || ELF_COMMON_DEF_P (h))) |
41bed6dd | 4234 | return FALSE; |
cc78d0af | 4235 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 4236 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
4237 | rela.r_addend = (h->root.u.def.value |
4238 | + h->root.u.def.section->output_section->vma | |
4239 | + h->root.u.def.section->output_offset); | |
4240 | } | |
4241 | else | |
4242 | { | |
4243 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 4244 | do_glob_dat: |
c434dee6 | 4245 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4246 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 4247 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
4248 | rela.r_addend = 0; |
4249 | } | |
4250 | ||
233cc9c1 | 4251 | elf_append_rela (output_bfd, relgot, &rela); |
053579d7 AJ |
4252 | } |
4253 | ||
f5385ebf | 4254 | if (h->needs_copy) |
70256ad8 | 4255 | { |
70256ad8 | 4256 | Elf_Internal_Rela rela; |
5474d94f | 4257 | asection *s; |
70256ad8 AJ |
4258 | |
4259 | /* This symbol needs a copy reloc. Set it up. */ | |
ff38b4cc | 4260 | VERIFY_COPY_RELOC (h, htab) |
70256ad8 AJ |
4261 | |
4262 | rela.r_offset = (h->root.u.def.value | |
4263 | + h->root.u.def.section->output_section->vma | |
4264 | + h->root.u.def.section->output_offset); | |
351f65ca | 4265 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 4266 | rela.r_addend = 0; |
afbf7e8e | 4267 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
4268 | s = htab->elf.sreldynrelro; |
4269 | else | |
4270 | s = htab->elf.srelbss; | |
4271 | elf_append_rela (output_bfd, s, &rela); | |
70256ad8 AJ |
4272 | } |
4273 | ||
b34976b6 | 4274 | return TRUE; |
70256ad8 AJ |
4275 | } |
4276 | ||
c25bc9fc L |
4277 | /* Finish up local dynamic symbol handling. We set the contents of |
4278 | various dynamic sections here. */ | |
4279 | ||
4280 | static bfd_boolean | |
351f65ca | 4281 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
4282 | { |
4283 | struct elf_link_hash_entry *h | |
4284 | = (struct elf_link_hash_entry *) *slot; | |
4285 | struct bfd_link_info *info | |
eed180f8 | 4286 | = (struct bfd_link_info *) inf; |
c25bc9fc | 4287 | |
351f65ca | 4288 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
5f0f0847 | 4289 | info, h, NULL); |
c25bc9fc L |
4290 | } |
4291 | ||
aec6b87e L |
4292 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
4293 | here since undefined weak symbol may not be dynamic and may not be | |
4294 | called for elf_x86_64_finish_dynamic_symbol. */ | |
4295 | ||
4296 | static bfd_boolean | |
4297 | elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
4298 | void *inf) | |
4299 | { | |
4300 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
4301 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
4302 | ||
4303 | if (h->root.type != bfd_link_hash_undefweak | |
4304 | || h->dynindx != -1) | |
4305 | return TRUE; | |
4306 | ||
4307 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, | |
5f0f0847 | 4308 | info, h, NULL); |
aec6b87e L |
4309 | } |
4310 | ||
c434dee6 AJ |
4311 | /* Used to decide how to sort relocs in an optimal manner for the |
4312 | dynamic linker, before writing them out. */ | |
4313 | ||
4314 | static enum elf_reloc_type_class | |
cae1fbbb | 4315 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
4316 | const asection *rel_sec ATTRIBUTE_UNUSED, |
4317 | const Elf_Internal_Rela *rela) | |
c434dee6 | 4318 | { |
cae1fbbb L |
4319 | bfd *abfd = info->output_bfd; |
4320 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
0afcef53 L |
4321 | struct elf_x86_link_hash_table *htab |
4322 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
cae1fbbb | 4323 | |
d9e3b590 L |
4324 | if (htab->elf.dynsym != NULL |
4325 | && htab->elf.dynsym->contents != NULL) | |
4326 | { | |
4327 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
07d6d2b8 | 4328 | dynamic symbols. */ |
d9e3b590 | 4329 | unsigned long r_symndx = htab->r_sym (rela->r_info); |
897463b1 L |
4330 | if (r_symndx != STN_UNDEF) |
4331 | { | |
4332 | Elf_Internal_Sym sym; | |
4333 | if (!bed->s->swap_symbol_in (abfd, | |
4334 | (htab->elf.dynsym->contents | |
4335 | + r_symndx * bed->s->sizeof_sym), | |
4336 | 0, &sym)) | |
4337 | abort (); | |
d9e3b590 | 4338 | |
897463b1 L |
4339 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
4340 | return reloc_class_ifunc; | |
4341 | } | |
d9e3b590 | 4342 | } |
cae1fbbb | 4343 | |
351f65ca | 4344 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 | 4345 | { |
c428ce9d L |
4346 | case R_X86_64_IRELATIVE: |
4347 | return reloc_class_ifunc; | |
c434dee6 | 4348 | case R_X86_64_RELATIVE: |
1da80baa | 4349 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
4350 | return reloc_class_relative; |
4351 | case R_X86_64_JUMP_SLOT: | |
4352 | return reloc_class_plt; | |
4353 | case R_X86_64_COPY: | |
4354 | return reloc_class_copy; | |
4355 | default: | |
4356 | return reloc_class_normal; | |
4357 | } | |
4358 | } | |
4359 | ||
70256ad8 AJ |
4360 | /* Finish up the dynamic sections. */ |
4361 | ||
b34976b6 | 4362 | static bfd_boolean |
351f65ca L |
4363 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
4364 | struct bfd_link_info *info) | |
70256ad8 | 4365 | { |
0afcef53 | 4366 | struct elf_x86_link_hash_table *htab; |
70256ad8 | 4367 | |
9577f60b | 4368 | htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info); |
4dfe6ac6 NC |
4369 | if (htab == NULL) |
4370 | return FALSE; | |
4371 | ||
9577f60b L |
4372 | if (! htab->elf.dynamic_sections_created) |
4373 | return TRUE; | |
70256ad8 | 4374 | |
9577f60b | 4375 | if (htab->elf.splt && htab->elf.splt->size > 0) |
e41b3a13 | 4376 | { |
9577f60b L |
4377 | elf_section_data (htab->elf.splt->output_section) |
4378 | ->this_hdr.sh_entsize = htab->plt.plt_entry_size; | |
e41b3a13 | 4379 | |
9577f60b | 4380 | if (htab->plt.has_plt0) |
fff53dae | 4381 | { |
9577f60b L |
4382 | /* Fill in the special first entry in the procedure linkage |
4383 | table. */ | |
4384 | memcpy (htab->elf.splt->contents, | |
4385 | htab->lazy_plt->plt0_entry, | |
4386 | htab->lazy_plt->plt0_entry_size); | |
4387 | /* Add offset for pushq GOT+8(%rip), since the instruction | |
4388 | uses 6 bytes subtract this value. */ | |
4389 | bfd_put_32 (output_bfd, | |
4390 | (htab->elf.sgotplt->output_section->vma | |
4391 | + htab->elf.sgotplt->output_offset | |
4392 | + 8 | |
4393 | - htab->elf.splt->output_section->vma | |
4394 | - htab->elf.splt->output_offset | |
4395 | - 6), | |
4396 | (htab->elf.splt->contents | |
4397 | + htab->lazy_plt->plt0_got1_offset)); | |
4398 | /* Add offset for the PC-relative instruction accessing | |
4399 | GOT+16, subtracting the offset to the end of that | |
4400 | instruction. */ | |
4401 | bfd_put_32 (output_bfd, | |
4402 | (htab->elf.sgotplt->output_section->vma | |
4403 | + htab->elf.sgotplt->output_offset | |
4404 | + 16 | |
4405 | - htab->elf.splt->output_section->vma | |
4406 | - htab->elf.splt->output_offset | |
4407 | - htab->lazy_plt->plt0_got2_insn_end), | |
4408 | (htab->elf.splt->contents | |
4409 | + htab->lazy_plt->plt0_got2_offset)); | |
fff53dae | 4410 | } |
fff53dae | 4411 | |
9577f60b | 4412 | if (htab->tlsdesc_plt) |
8361ed4d | 4413 | { |
9577f60b L |
4414 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
4415 | htab->elf.sgot->contents + htab->tlsdesc_got); | |
4416 | ||
4417 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, | |
4418 | htab->lazy_plt->plt0_entry, | |
4419 | htab->lazy_plt->plt0_entry_size); | |
4420 | ||
4421 | /* Add offset for pushq GOT+8(%rip), since the | |
4422 | instruction uses 6 bytes subtract this value. */ | |
4423 | bfd_put_32 (output_bfd, | |
4424 | (htab->elf.sgotplt->output_section->vma | |
4425 | + htab->elf.sgotplt->output_offset | |
4426 | + 8 | |
4427 | - htab->elf.splt->output_section->vma | |
4428 | - htab->elf.splt->output_offset | |
4429 | - htab->tlsdesc_plt | |
4430 | - 6), | |
4431 | (htab->elf.splt->contents | |
4432 | + htab->tlsdesc_plt | |
4433 | + htab->lazy_plt->plt0_got1_offset)); | |
4434 | /* Add offset for the PC-relative instruction accessing | |
4435 | GOT+TDG, where TDG stands for htab->tlsdesc_got, | |
4436 | subtracting the offset to the end of that | |
4437 | instruction. */ | |
4438 | bfd_put_32 (output_bfd, | |
4439 | (htab->elf.sgot->output_section->vma | |
4440 | + htab->elf.sgot->output_offset | |
4441 | + htab->tlsdesc_got | |
4442 | - htab->elf.splt->output_section->vma | |
4443 | - htab->elf.splt->output_offset | |
4444 | - htab->tlsdesc_plt | |
4445 | - htab->lazy_plt->plt0_got2_insn_end), | |
4446 | (htab->elf.splt->contents | |
4447 | + htab->tlsdesc_plt | |
4448 | + htab->lazy_plt->plt0_got2_offset)); | |
8361ed4d L |
4449 | } |
4450 | } | |
4451 | ||
aec6b87e L |
4452 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
4453 | if (bfd_link_pie (info)) | |
4454 | bfd_hash_traverse (&info->hash->table, | |
4455 | elf_x86_64_pie_finish_undefweak_symbol, | |
4456 | info); | |
4457 | ||
b34976b6 | 4458 | return TRUE; |
8d88c4ca NC |
4459 | } |
4460 | ||
233cc9c1 L |
4461 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
4462 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
4463 | It has to be done before elf_link_sort_relocs is called so that | |
4464 | dynamic relocations are properly sorted. */ | |
4465 | ||
4466 | static bfd_boolean | |
4467 | elf_x86_64_output_arch_local_syms | |
4468 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
4469 | struct bfd_link_info *info, | |
4470 | void *flaginfo ATTRIBUTE_UNUSED, | |
4471 | int (*func) (void *, const char *, | |
4472 | Elf_Internal_Sym *, | |
4473 | asection *, | |
4474 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
4475 | { | |
0afcef53 L |
4476 | struct elf_x86_link_hash_table *htab |
4477 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
233cc9c1 L |
4478 | if (htab == NULL) |
4479 | return FALSE; | |
4480 | ||
4481 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
4482 | htab_traverse (htab->loc_hash_table, | |
4483 | elf_x86_64_finish_local_dynamic_symbol, | |
4484 | info); | |
4485 | ||
4486 | return TRUE; | |
4487 | } | |
4488 | ||
38b12349 | 4489 | /* Forward declaration. */ |
765e526c | 4490 | static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt; |
38b12349 L |
4491 | |
4492 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all | |
4493 | dynamic relocations. */ | |
4494 | ||
4495 | static long | |
4496 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
4497 | long symcount ATTRIBUTE_UNUSED, | |
4498 | asymbol **syms ATTRIBUTE_UNUSED, | |
4499 | long dynsymcount, | |
4500 | asymbol **dynsyms, | |
4501 | asymbol **ret) | |
4502 | { | |
f493882d | 4503 | long count, i, n; |
38b12349 | 4504 | int j; |
38b12349 | 4505 | bfd_byte *plt_contents; |
f493882d | 4506 | long relsize; |
765e526c L |
4507 | const struct elf_x86_lazy_plt_layout *lazy_plt; |
4508 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
4509 | const struct elf_x86_lazy_plt_layout *lazy_bnd_plt; | |
4510 | const struct elf_x86_non_lazy_plt_layout *non_lazy_bnd_plt; | |
4511 | const struct elf_x86_lazy_plt_layout *lazy_ibt_plt; | |
4512 | const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt; | |
38b12349 | 4513 | asection *plt; |
f493882d L |
4514 | enum elf_x86_plt_type plt_type; |
4515 | struct elf_x86_plt plts[] = | |
144bed8d | 4516 | { |
38b12349 L |
4517 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
4518 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
f2c29a16 L |
4519 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, |
4520 | { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
dd9e66ee | 4521 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } |
38b12349 | 4522 | }; |
144bed8d | 4523 | |
38b12349 | 4524 | *ret = NULL; |
144bed8d | 4525 | |
38b12349 L |
4526 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
4527 | return 0; | |
144bed8d | 4528 | |
38b12349 L |
4529 | if (dynsymcount <= 0) |
4530 | return 0; | |
cca5b8b6 | 4531 | |
38b12349 L |
4532 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
4533 | if (relsize <= 0) | |
4534 | return -1; | |
4535 | ||
3b4c3844 | 4536 | if (get_elf_x86_backend_data (abfd)->target_os != is_nacl) |
144bed8d | 4537 | { |
38b12349 L |
4538 | lazy_plt = &elf_x86_64_lazy_plt; |
4539 | non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
4540 | lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt; | |
4541 | non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt; | |
ee2fdd6f L |
4542 | if (ABI_64_P (abfd)) |
4543 | { | |
4544 | lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; | |
4545 | non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
4546 | } | |
4547 | else | |
4548 | { | |
4549 | lazy_ibt_plt = &elf_x32_lazy_ibt_plt; | |
4550 | non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
4551 | } | |
38b12349 L |
4552 | } |
4553 | else | |
4554 | { | |
4555 | lazy_plt = &elf_x86_64_nacl_plt; | |
4556 | non_lazy_plt = NULL; | |
4557 | lazy_bnd_plt = NULL; | |
4558 | non_lazy_bnd_plt = NULL; | |
ee2fdd6f L |
4559 | lazy_ibt_plt = NULL; |
4560 | non_lazy_ibt_plt = NULL; | |
38b12349 | 4561 | } |
144bed8d | 4562 | |
38b12349 L |
4563 | count = 0; |
4564 | for (j = 0; plts[j].name != NULL; j++) | |
4565 | { | |
4566 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
90efb642 | 4567 | if (plt == NULL || plt->size == 0) |
6f25f223 | 4568 | continue; |
533d0af0 | 4569 | |
38b12349 L |
4570 | /* Get the PLT section contents. */ |
4571 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
4572 | if (plt_contents == NULL) | |
4573 | break; | |
4574 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
4575 | plt_contents, 0, plt->size)) | |
4576 | { | |
4577 | free (plt_contents); | |
4578 | break; | |
4579 | } | |
144bed8d | 4580 | |
38b12349 L |
4581 | /* Check what kind of PLT it is. */ |
4582 | plt_type = plt_unknown; | |
90efb642 L |
4583 | if (plts[j].type == plt_unknown |
4584 | && (plt->size >= (lazy_plt->plt_entry_size | |
4585 | + lazy_plt->plt_entry_size))) | |
144bed8d | 4586 | { |
38b12349 L |
4587 | /* Match lazy PLT first. Need to check the first two |
4588 | instructions. */ | |
4589 | if ((memcmp (plt_contents, lazy_plt->plt0_entry, | |
4590 | lazy_plt->plt0_got1_offset) == 0) | |
4591 | && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6, | |
4592 | 2) == 0)) | |
4593 | plt_type = plt_lazy; | |
4594 | else if (lazy_bnd_plt != NULL | |
4595 | && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry, | |
4596 | lazy_bnd_plt->plt0_got1_offset) == 0) | |
4597 | && (memcmp (plt_contents + 6, | |
4598 | lazy_bnd_plt->plt0_entry + 6, 3) == 0)) | |
ec1f73bb | 4599 | { |
f2c29a16 | 4600 | plt_type = plt_lazy | plt_second; |
ee2fdd6f L |
4601 | /* The fist entry in the lazy IBT PLT is the same as the |
4602 | lazy BND PLT. */ | |
4603 | if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size, | |
4604 | lazy_ibt_plt->plt_entry, | |
4605 | lazy_ibt_plt->plt_got_offset) == 0)) | |
4606 | lazy_plt = lazy_ibt_plt; | |
4607 | else | |
4608 | lazy_plt = lazy_bnd_plt; | |
ec1f73bb | 4609 | } |
144bed8d | 4610 | } |
fca6ae69 | 4611 | |
38b12349 | 4612 | if (non_lazy_plt != NULL |
90efb642 L |
4613 | && (plt_type == plt_unknown || plt_type == plt_non_lazy) |
4614 | && plt->size >= non_lazy_plt->plt_entry_size) | |
38b12349 L |
4615 | { |
4616 | /* Match non-lazy PLT. */ | |
4617 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
4618 | non_lazy_plt->plt_got_offset) == 0) | |
4619 | plt_type = plt_non_lazy; | |
4620 | } | |
4621 | ||
ee2fdd6f | 4622 | if (plt_type == plt_unknown || plt_type == plt_second) |
38b12349 | 4623 | { |
ee2fdd6f | 4624 | if (non_lazy_bnd_plt != NULL |
90efb642 | 4625 | && plt->size >= non_lazy_bnd_plt->plt_entry_size |
ee2fdd6f L |
4626 | && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry, |
4627 | non_lazy_bnd_plt->plt_got_offset) == 0)) | |
38b12349 | 4628 | { |
ee2fdd6f | 4629 | /* Match BND PLT. */ |
f2c29a16 | 4630 | plt_type = plt_second; |
38b12349 L |
4631 | non_lazy_plt = non_lazy_bnd_plt; |
4632 | } | |
ee2fdd6f | 4633 | else if (non_lazy_ibt_plt != NULL |
90efb642 | 4634 | && plt->size >= non_lazy_ibt_plt->plt_entry_size |
ee2fdd6f L |
4635 | && (memcmp (plt_contents, |
4636 | non_lazy_ibt_plt->plt_entry, | |
4637 | non_lazy_ibt_plt->plt_got_offset) == 0)) | |
4638 | { | |
4639 | /* Match IBT PLT. */ | |
4640 | plt_type = plt_second; | |
4641 | non_lazy_plt = non_lazy_ibt_plt; | |
4642 | } | |
38b12349 L |
4643 | } |
4644 | ||
4645 | if (plt_type == plt_unknown) | |
37c0b6ee L |
4646 | { |
4647 | free (plt_contents); | |
4648 | continue; | |
4649 | } | |
38b12349 L |
4650 | |
4651 | plts[j].sec = plt; | |
4652 | plts[j].type = plt_type; | |
4653 | ||
4654 | if ((plt_type & plt_lazy)) | |
4655 | { | |
4656 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
4657 | plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size; | |
4658 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
4659 | /* Skip PLT0 in lazy PLT. */ | |
4660 | i = 1; | |
4661 | } | |
4662 | else | |
4663 | { | |
4664 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
4665 | plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size; | |
4666 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
4667 | i = 0; | |
4668 | } | |
4669 | ||
f2c29a16 L |
4670 | /* Skip lazy PLT when the second PLT is used. */ |
4671 | if (plt_type == (plt_lazy | plt_second)) | |
38b12349 L |
4672 | plts[j].count = 0; |
4673 | else | |
4674 | { | |
4675 | n = plt->size / plts[j].plt_entry_size; | |
4676 | plts[j].count = n; | |
4677 | count += n - i; | |
4678 | } | |
4679 | ||
4680 | plts[j].contents = plt_contents; | |
144bed8d L |
4681 | } |
4682 | ||
f493882d L |
4683 | return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize, |
4684 | (bfd_vma) 0, plts, dynsyms, | |
4685 | ret); | |
0ff2b86e L |
4686 | } |
4687 | ||
d2b2c203 DJ |
4688 | /* Handle an x86-64 specific section when reading an object file. This |
4689 | is called when elfcode.h finds a section with an unknown type. */ | |
4690 | ||
4691 | static bfd_boolean | |
0c723101 L |
4692 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
4693 | const char *name, int shindex) | |
d2b2c203 DJ |
4694 | { |
4695 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
4696 | return FALSE; | |
4697 | ||
6dc132d9 | 4698 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
4699 | return FALSE; |
4700 | ||
4701 | return TRUE; | |
4702 | } | |
4703 | ||
3b22753a L |
4704 | /* Hook called by the linker routine which adds symbols from an object |
4705 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
4706 | of .bss. */ | |
4707 | ||
4708 | static bfd_boolean | |
351f65ca | 4709 | elf_x86_64_add_symbol_hook (bfd *abfd, |
a43942db | 4710 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
351f65ca L |
4711 | Elf_Internal_Sym *sym, |
4712 | const char **namep ATTRIBUTE_UNUSED, | |
4713 | flagword *flagsp ATTRIBUTE_UNUSED, | |
4714 | asection **secp, | |
4715 | bfd_vma *valp) | |
3b22753a L |
4716 | { |
4717 | asection *lcomm; | |
4718 | ||
4719 | switch (sym->st_shndx) | |
4720 | { | |
4721 | case SHN_X86_64_LCOMMON: | |
4722 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
4723 | if (lcomm == NULL) | |
4724 | { | |
4725 | lcomm = bfd_make_section_with_flags (abfd, | |
4726 | "LARGE_COMMON", | |
4727 | (SEC_ALLOC | |
4728 | | SEC_IS_COMMON | |
4729 | | SEC_LINKER_CREATED)); | |
4730 | if (lcomm == NULL) | |
4731 | return FALSE; | |
4732 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
4733 | } | |
4734 | *secp = lcomm; | |
4735 | *valp = sym->st_size; | |
c35bdf6e | 4736 | return TRUE; |
3b22753a | 4737 | } |
d8045f23 | 4738 | |
3b22753a L |
4739 | return TRUE; |
4740 | } | |
4741 | ||
4742 | ||
4743 | /* Given a BFD section, try to locate the corresponding ELF section | |
4744 | index. */ | |
4745 | ||
4746 | static bfd_boolean | |
351f65ca L |
4747 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
4748 | asection *sec, int *index_return) | |
3b22753a L |
4749 | { |
4750 | if (sec == &_bfd_elf_large_com_section) | |
4751 | { | |
91d6fa6a | 4752 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
4753 | return TRUE; |
4754 | } | |
4755 | return FALSE; | |
4756 | } | |
4757 | ||
4758 | /* Process a symbol. */ | |
4759 | ||
4760 | static void | |
351f65ca L |
4761 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
4762 | asymbol *asym) | |
3b22753a L |
4763 | { |
4764 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
4765 | ||
4766 | switch (elfsym->internal_elf_sym.st_shndx) | |
4767 | { | |
4768 | case SHN_X86_64_LCOMMON: | |
4769 | asym->section = &_bfd_elf_large_com_section; | |
4770 | asym->value = elfsym->internal_elf_sym.st_size; | |
4771 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
4772 | asym->flags &= ~BSF_GLOBAL; | |
4773 | break; | |
4774 | } | |
4775 | } | |
4776 | ||
4777 | static bfd_boolean | |
351f65ca | 4778 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
4779 | { |
4780 | return (sym->st_shndx == SHN_COMMON | |
4781 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
4782 | } | |
4783 | ||
4784 | static unsigned int | |
351f65ca | 4785 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
4786 | { |
4787 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
4788 | return SHN_COMMON; | |
4789 | else | |
4790 | return SHN_X86_64_LCOMMON; | |
4791 | } | |
4792 | ||
4793 | static asection * | |
351f65ca | 4794 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
4795 | { |
4796 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
4797 | return bfd_com_section_ptr; | |
4798 | else | |
4799 | return &_bfd_elf_large_com_section; | |
4800 | } | |
4801 | ||
4802 | static bfd_boolean | |
5d13b3b3 AM |
4803 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
4804 | const Elf_Internal_Sym *sym, | |
351f65ca | 4805 | asection **psec, |
5d13b3b3 AM |
4806 | bfd_boolean newdef, |
4807 | bfd_boolean olddef, | |
351f65ca | 4808 | bfd *oldbfd, |
5d13b3b3 | 4809 | const asection *oldsec) |
3b22753a L |
4810 | { |
4811 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
4812 | normal common symbol. We turn the large common symbol into a |
4813 | normal one. */ | |
5d13b3b3 | 4814 | if (!olddef |
3b22753a | 4815 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
4816 | && !newdef |
4817 | && bfd_is_com_section (*psec) | |
4818 | && oldsec != *psec) | |
3b22753a | 4819 | { |
00492999 | 4820 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 4821 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
4822 | { |
4823 | h->root.u.c.p->section | |
4824 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
4825 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
4826 | } | |
4827 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
4828 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
4829 | *psec = bfd_com_section_ptr; | |
3b22753a L |
4830 | } |
4831 | ||
4832 | return TRUE; | |
4833 | } | |
4834 | ||
4835 | static int | |
351f65ca L |
4836 | elf_x86_64_additional_program_headers (bfd *abfd, |
4837 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
4838 | { |
4839 | asection *s; | |
9a2e389a | 4840 | int count = 0; |
3b22753a L |
4841 | |
4842 | /* Check to see if we need a large readonly segment. */ | |
4843 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
4844 | if (s && (s->flags & SEC_LOAD)) | |
4845 | count++; | |
4846 | ||
4847 | /* Check to see if we need a large data segment. Since .lbss sections | |
4848 | is placed right after the .bss section, there should be no need for | |
4849 | a large data segment just because of .lbss. */ | |
4850 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
4851 | if (s && (s->flags & SEC_LOAD)) | |
4852 | count++; | |
4853 | ||
4854 | return count; | |
4855 | } | |
4856 | ||
c543bf9a L |
4857 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
4858 | ||
4859 | static bfd_boolean | |
4860 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
4861 | const bfd_target *output) | |
4862 | { | |
4863 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
4864 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
4865 | && _bfd_elf_relocs_compatible (input, output)); | |
4866 | } | |
4867 | ||
38b12349 L |
4868 | /* Set up x86-64 GNU properties. Return the first relocatable ELF input |
4869 | with GNU properties if found. Otherwise, return NULL. */ | |
4870 | ||
4871 | static bfd * | |
4872 | elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info) | |
4873 | { | |
1de031c8 | 4874 | struct elf_x86_init_table init_table; |
ee2fdd6f | 4875 | |
78984959 L |
4876 | if ((int) R_X86_64_standard >= (int) R_X86_64_converted_reloc_bit |
4877 | || (int) R_X86_64_max <= (int) R_X86_64_converted_reloc_bit | |
4878 | || ((int) (R_X86_64_GNU_VTINHERIT | R_X86_64_converted_reloc_bit) | |
4879 | != (int) R_X86_64_GNU_VTINHERIT) | |
4880 | || ((int) (R_X86_64_GNU_VTENTRY | R_X86_64_converted_reloc_bit) | |
4881 | != (int) R_X86_64_GNU_VTENTRY)) | |
4882 | abort (); | |
4883 | ||
851b6fa1 L |
4884 | /* This is unused for x86-64. */ |
4885 | init_table.plt0_pad_byte = 0x90; | |
4886 | ||
3b4c3844 | 4887 | if (get_elf_x86_backend_data (info->output_bfd)->target_os != is_nacl) |
73784fa5 | 4888 | { |
a6798bab | 4889 | if (info->bndplt) |
ee2fdd6f | 4890 | { |
1de031c8 L |
4891 | init_table.lazy_plt = &elf_x86_64_lazy_bnd_plt; |
4892 | init_table.non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt; | |
ee2fdd6f L |
4893 | } |
4894 | else | |
4895 | { | |
1de031c8 L |
4896 | init_table.lazy_plt = &elf_x86_64_lazy_plt; |
4897 | init_table.non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
ee2fdd6f | 4898 | } |
38b12349 | 4899 | |
a6798bab | 4900 | if (ABI_64_P (info->output_bfd)) |
38b12349 | 4901 | { |
1de031c8 L |
4902 | init_table.lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; |
4903 | init_table.non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
38b12349 L |
4904 | } |
4905 | else | |
4906 | { | |
1de031c8 L |
4907 | init_table.lazy_ibt_plt = &elf_x32_lazy_ibt_plt; |
4908 | init_table.non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
38b12349 | 4909 | } |
38b12349 L |
4910 | } |
4911 | else | |
4912 | { | |
1de031c8 L |
4913 | init_table.lazy_plt = &elf_x86_64_nacl_plt; |
4914 | init_table.non_lazy_plt = NULL; | |
4915 | init_table.lazy_ibt_plt = NULL; | |
4916 | init_table.non_lazy_ibt_plt = NULL; | |
38b12349 L |
4917 | } |
4918 | ||
7a382c1c L |
4919 | if (ABI_64_P (info->output_bfd)) |
4920 | { | |
1de031c8 L |
4921 | init_table.r_info = elf64_r_info; |
4922 | init_table.r_sym = elf64_r_sym; | |
7a382c1c L |
4923 | } |
4924 | else | |
4925 | { | |
1de031c8 L |
4926 | init_table.r_info = elf32_r_info; |
4927 | init_table.r_sym = elf32_r_sym; | |
7a382c1c L |
4928 | } |
4929 | ||
1de031c8 | 4930 | return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table); |
38b12349 L |
4931 | } |
4932 | ||
9a2e389a | 4933 | static const struct bfd_elf_special_section |
46bed679 | 4934 | elf_x86_64_special_sections[]= |
3b22753a | 4935 | { |
0112cd26 NC |
4936 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
4937 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
4938 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
07d6d2b8 | 4939 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
0112cd26 NC |
4940 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
4941 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
07d6d2b8 | 4942 | { NULL, 0, 0, 0, 0 } |
3b22753a L |
4943 | }; |
4944 | ||
6d00b590 | 4945 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
4946 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
4947 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 4948 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 4949 | #define ELF_MACHINE_CODE EM_X86_64 |
f6aec96d L |
4950 | #if DEFAULT_LD_Z_SEPARATE_CODE |
4951 | # define ELF_MAXPAGESIZE 0x1000 | |
4952 | #else | |
4953 | # define ELF_MAXPAGESIZE 0x200000 | |
4954 | #endif | |
2043964e | 4955 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 4956 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
4957 | |
4958 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 4959 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
4960 | #define elf_backend_want_got_plt 1 |
4961 | #define elf_backend_plt_readonly 1 | |
4962 | #define elf_backend_want_plt_sym 0 | |
4963 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 4964 | #define elf_backend_rela_normal 1 |
07d6d2b8 | 4965 | #define elf_backend_plt_alignment 4 |
f7483970 | 4966 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 4967 | #define elf_backend_caches_rawsize 1 |
64f52338 | 4968 | #define elf_backend_dtrel_excludes_plt 1 |
5474d94f | 4969 | #define elf_backend_want_dynrelro 1 |
70256ad8 | 4970 | |
351f65ca | 4971 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 4972 | |
351f65ca | 4973 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 4974 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 4975 | elf_x86_64_reloc_name_lookup |
70256ad8 | 4976 | |
c543bf9a | 4977 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca | 4978 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
38b12349 | 4979 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
351f65ca L |
4980 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections |
4981 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
233cc9c1 | 4982 | #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms |
351f65ca L |
4983 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus |
4984 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
4985 | #ifdef CORE_HEADER |
4986 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
4987 | #endif | |
351f65ca L |
4988 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
4989 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
74541ad4 | 4990 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 4991 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
0ff2b86e | 4992 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 4993 | |
d2b2c203 | 4994 | #define elf_backend_section_from_shdr \ |
351f65ca | 4995 | elf_x86_64_section_from_shdr |
d2b2c203 | 4996 | |
3b22753a | 4997 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 4998 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 4999 | #define elf_backend_add_symbol_hook \ |
351f65ca | 5000 | elf_x86_64_add_symbol_hook |
3b22753a | 5001 | #define elf_backend_symbol_processing \ |
351f65ca | 5002 | elf_x86_64_symbol_processing |
3b22753a | 5003 | #define elf_backend_common_section_index \ |
351f65ca | 5004 | elf_x86_64_common_section_index |
3b22753a | 5005 | #define elf_backend_common_section \ |
351f65ca | 5006 | elf_x86_64_common_section |
3b22753a | 5007 | #define elf_backend_common_definition \ |
351f65ca | 5008 | elf_x86_64_common_definition |
3b22753a | 5009 | #define elf_backend_merge_symbol \ |
351f65ca | 5010 | elf_x86_64_merge_symbol |
3b22753a | 5011 | #define elf_backend_special_sections \ |
351f65ca | 5012 | elf_x86_64_special_sections |
3b22753a | 5013 | #define elf_backend_additional_program_headers \ |
351f65ca | 5014 | elf_x86_64_additional_program_headers |
38b12349 | 5015 | #define elf_backend_setup_gnu_properties \ |
9f857535 L |
5016 | elf_x86_64_link_setup_gnu_properties |
5017 | #define elf_backend_hide_symbol \ | |
5018 | _bfd_x86_elf_hide_symbol | |
3b22753a | 5019 | |
8d88c4ca | 5020 | #include "elf64-target.h" |
9d7cbccd | 5021 | |
6036f486 ES |
5022 | /* CloudABI support. */ |
5023 | ||
07d6d2b8 | 5024 | #undef TARGET_LITTLE_SYM |
6036f486 | 5025 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec |
07d6d2b8 | 5026 | #undef TARGET_LITTLE_NAME |
6036f486 ES |
5027 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" |
5028 | ||
5029 | #undef ELF_OSABI | |
5030 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
5031 | ||
07d6d2b8 | 5032 | #undef elf64_bed |
6036f486 ES |
5033 | #define elf64_bed elf64_x86_64_cloudabi_bed |
5034 | ||
5035 | #include "elf64-target.h" | |
5036 | ||
9d7cbccd NC |
5037 | /* FreeBSD support. */ |
5038 | ||
07d6d2b8 | 5039 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5040 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
07d6d2b8 | 5041 | #undef TARGET_LITTLE_NAME |
9d7cbccd NC |
5042 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" |
5043 | ||
d1036acb L |
5044 | #undef ELF_OSABI |
5045 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 5046 | |
07d6d2b8 | 5047 | #undef elf64_bed |
9d7cbccd NC |
5048 | #define elf64_bed elf64_x86_64_fbsd_bed |
5049 | ||
5050 | #include "elf64-target.h" | |
8a9036a4 | 5051 | |
a6cc6b3b RO |
5052 | /* Solaris 2 support. */ |
5053 | ||
5054 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5055 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
5056 | #undef TARGET_LITTLE_NAME |
5057 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
5058 | ||
3b4c3844 L |
5059 | static const struct elf_x86_backend_data elf_x86_64_solaris_arch_bed = |
5060 | { | |
5061 | is_solaris /* os */ | |
5062 | }; | |
5063 | ||
5064 | #undef elf_backend_arch_data | |
5065 | #define elf_backend_arch_data &elf_x86_64_solaris_arch_bed | |
5066 | ||
a6cc6b3b RO |
5067 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE |
5068 | objects won't be recognized. */ | |
5069 | #undef ELF_OSABI | |
5070 | ||
5071 | #undef elf64_bed | |
5072 | #define elf64_bed elf64_x86_64_sol2_bed | |
5073 | ||
7dc98aea RO |
5074 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
5075 | boundary. */ | |
84865015 | 5076 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
5077 | #define elf_backend_static_tls_alignment 16 |
5078 | ||
a6cc6b3b RO |
5079 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
5080 | ||
5081 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
5082 | File, p.63. */ | |
84865015 | 5083 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
5084 | #define elf_backend_want_plt_sym 1 |
5085 | ||
84865015 NC |
5086 | #undef elf_backend_strtab_flags |
5087 | #define elf_backend_strtab_flags SHF_STRINGS | |
5088 | ||
5089 | static bfd_boolean | |
5522f910 NC |
5090 | elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
5091 | bfd *obfd ATTRIBUTE_UNUSED, | |
5092 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
5093 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
5094 | { |
5095 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
5096 | and sh_link fields of Solaris specific section types. */ | |
5097 | return FALSE; | |
5098 | } | |
5099 | ||
5522f910 NC |
5100 | #undef elf_backend_copy_special_section_fields |
5101 | #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields | |
84865015 | 5102 | |
a6cc6b3b RO |
5103 | #include "elf64-target.h" |
5104 | ||
8059fb19 RM |
5105 | /* Native Client support. */ |
5106 | ||
64b384e1 RM |
5107 | static bfd_boolean |
5108 | elf64_x86_64_nacl_elf_object_p (bfd *abfd) | |
5109 | { | |
5110 | /* Set the right machine number for a NaCl x86-64 ELF64 file. */ | |
5111 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl); | |
5112 | return TRUE; | |
5113 | } | |
5114 | ||
8059fb19 | 5115 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5116 | #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec |
8059fb19 RM |
5117 | #undef TARGET_LITTLE_NAME |
5118 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
5119 | #undef elf64_bed | |
5120 | #define elf64_bed elf64_x86_64_nacl_bed | |
5121 | ||
5122 | #undef ELF_MAXPAGESIZE | |
5123 | #undef ELF_MINPAGESIZE | |
5124 | #undef ELF_COMMONPAGESIZE | |
5125 | #define ELF_MAXPAGESIZE 0x10000 | |
5126 | #define ELF_MINPAGESIZE 0x10000 | |
5127 | #define ELF_COMMONPAGESIZE 0x10000 | |
5128 | ||
5129 | /* Restore defaults. */ | |
5130 | #undef ELF_OSABI | |
5131 | #undef elf_backend_static_tls_alignment | |
5132 | #undef elf_backend_want_plt_sym | |
5133 | #define elf_backend_want_plt_sym 0 | |
84865015 | 5134 | #undef elf_backend_strtab_flags |
5522f910 | 5135 | #undef elf_backend_copy_special_section_fields |
8059fb19 RM |
5136 | |
5137 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
5138 | ||
5139 | #undef elf_backend_plt_alignment | |
5140 | #define elf_backend_plt_alignment 5 | |
5141 | #define NACL_PLT_ENTRY_SIZE 64 | |
5142 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
5143 | ||
5144 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
5145 | { | |
07d6d2b8 | 5146 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
8059fb19 | 5147 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ |
07d6d2b8 AM |
5148 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ |
5149 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5150 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
8059fb19 | 5151 | |
ea2d813e | 5152 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
70cc877f | 5153 | 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */ |
ea2d813e RM |
5154 | |
5155 | /* 32 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 5156 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 5157 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 5158 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 5159 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
07d6d2b8 AM |
5160 | 0x66, /* excess data16 prefix */ |
5161 | 0x90 /* nop */ | |
8059fb19 RM |
5162 | }; |
5163 | ||
5164 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
5165 | { | |
5166 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
07d6d2b8 AM |
5167 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ |
5168 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5169 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
8059fb19 RM |
5170 | |
5171 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
3ddf1bdd | 5172 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
5173 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
5174 | ||
5175 | /* Lazy GOT entries point here (32-byte aligned). */ | |
07d6d2b8 AM |
5176 | 0x68, /* pushq immediate */ |
5177 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
5178 | 0xe9, /* jmp relative */ | |
5179 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
8059fb19 | 5180 | |
07d6d2b8 | 5181 | /* 22 bytes of nop to pad out to the standard size. */ |
3ddf1bdd | 5182 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 5183 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
07d6d2b8 | 5184 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ |
8059fb19 RM |
5185 | }; |
5186 | ||
5187 | /* .eh_frame covering the .plt section. */ | |
5188 | ||
5189 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
5190 | { | |
07d6d2b8 AM |
5191 | #if (PLT_CIE_LENGTH != 20 \ |
5192 | || PLT_FDE_LENGTH != 36 \ | |
5193 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
8059fb19 | 5194 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) |
851b6fa1 | 5195 | # error "Need elf_x86_backend_data parameters for eh_frame_plt offsets!" |
8059fb19 RM |
5196 | #endif |
5197 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
5198 | 0, 0, 0, 0, /* CIE ID */ | |
5199 | 1, /* CIE version */ | |
07d6d2b8 | 5200 | 'z', 'R', 0, /* Augmentation string */ |
8059fb19 | 5201 | 1, /* Code alignment factor */ |
07d6d2b8 | 5202 | 0x78, /* Data alignment factor */ |
8059fb19 RM |
5203 | 16, /* Return address column */ |
5204 | 1, /* Augmentation size */ | |
5205 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
5206 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
5207 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
5208 | DW_CFA_nop, DW_CFA_nop, | |
5209 | ||
5210 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
5211 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
5212 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
5213 | 0, 0, 0, 0, /* .plt size goes here */ | |
5214 | 0, /* Augmentation size */ | |
5215 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
5216 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
5217 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
5218 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
5219 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
5220 | 13, /* Block length */ | |
5221 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
5222 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
5223 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
5224 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
5225 | DW_CFA_nop, DW_CFA_nop | |
5226 | }; | |
5227 | ||
765e526c | 5228 | static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt = |
8059fb19 | 5229 | { |
07d6d2b8 AM |
5230 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ |
5231 | NACL_PLT_ENTRY_SIZE, /* plt0_entry_size */ | |
5232 | elf_x86_64_nacl_plt_entry, /* plt_entry */ | |
5233 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
5234 | 2, /* plt0_got1_offset */ | |
5235 | 9, /* plt0_got2_offset */ | |
5236 | 13, /* plt0_got2_insn_end */ | |
5237 | 3, /* plt_got_offset */ | |
5238 | 33, /* plt_reloc_offset */ | |
5239 | 38, /* plt_plt_offset */ | |
5240 | 7, /* plt_got_insn_size */ | |
5241 | 42, /* plt_plt_insn_end */ | |
5242 | 32, /* plt_lazy_offset */ | |
5243 | elf_x86_64_nacl_plt0_entry, /* pic_plt0_entry */ | |
5244 | elf_x86_64_nacl_plt_entry, /* pic_plt_entry */ | |
5245 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ | |
38b12349 L |
5246 | sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */ |
5247 | }; | |
5248 | ||
851b6fa1 | 5249 | static const struct elf_x86_backend_data elf_x86_64_nacl_arch_bed = |
38b12349 | 5250 | { |
07d6d2b8 | 5251 | is_nacl /* os */ |
8059fb19 RM |
5252 | }; |
5253 | ||
5254 | #undef elf_backend_arch_data | |
5255 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
5256 | ||
64b384e1 RM |
5257 | #undef elf_backend_object_p |
5258 | #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p | |
5a68afcf RM |
5259 | #undef elf_backend_modify_segment_map |
5260 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
5261 | #undef elf_backend_modify_program_headers | |
5262 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
5263 | #undef elf_backend_final_write_processing |
5264 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 5265 | |
8059fb19 RM |
5266 | #include "elf64-target.h" |
5267 | ||
5268 | /* Native Client x32 support. */ | |
5269 | ||
64b384e1 RM |
5270 | static bfd_boolean |
5271 | elf32_x86_64_nacl_elf_object_p (bfd *abfd) | |
5272 | { | |
5273 | /* Set the right machine number for a NaCl x86-64 ELF32 file. */ | |
5274 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl); | |
5275 | return TRUE; | |
5276 | } | |
5277 | ||
07d6d2b8 | 5278 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5279 | #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec |
07d6d2b8 | 5280 | #undef TARGET_LITTLE_NAME |
8059fb19 RM |
5281 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" |
5282 | #undef elf32_bed | |
5283 | #define elf32_bed elf32_x86_64_nacl_bed | |
5284 | ||
8059fb19 RM |
5285 | #define bfd_elf32_bfd_reloc_type_lookup \ |
5286 | elf_x86_64_reloc_type_lookup | |
5287 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
5288 | elf_x86_64_reloc_name_lookup | |
b7365e5d L |
5289 | #define bfd_elf32_get_synthetic_symtab \ |
5290 | elf_x86_64_get_synthetic_symtab | |
8059fb19 RM |
5291 | |
5292 | #undef elf_backend_object_p | |
5293 | #define elf_backend_object_p \ | |
64b384e1 | 5294 | elf32_x86_64_nacl_elf_object_p |
8059fb19 RM |
5295 | |
5296 | #undef elf_backend_bfd_from_remote_memory | |
5297 | #define elf_backend_bfd_from_remote_memory \ | |
5298 | _bfd_elf32_bfd_from_remote_memory | |
5299 | ||
5300 | #undef elf_backend_size_info | |
5301 | #define elf_backend_size_info \ | |
5302 | _bfd_elf32_size_info | |
5303 | ||
5304 | #include "elf32-target.h" | |
5305 | ||
5306 | /* Restore defaults. */ | |
5a68afcf | 5307 | #undef elf_backend_object_p |
8059fb19 | 5308 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
5309 | #undef elf_backend_bfd_from_remote_memory |
5310 | #undef elf_backend_size_info | |
5311 | #undef elf_backend_modify_segment_map | |
5312 | #undef elf_backend_modify_program_headers | |
887badb3 | 5313 | #undef elf_backend_final_write_processing |
8059fb19 | 5314 | |
8a9036a4 L |
5315 | /* Intel L1OM support. */ |
5316 | ||
5317 | static bfd_boolean | |
5318 | elf64_l1om_elf_object_p (bfd *abfd) | |
5319 | { | |
5320 | /* Set the right machine number for an L1OM elf64 file. */ | |
5321 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
5322 | return TRUE; | |
5323 | } | |
5324 | ||
5325 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5326 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
5327 | #undef TARGET_LITTLE_NAME |
5328 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
5329 | #undef ELF_ARCH | |
5330 | #define ELF_ARCH bfd_arch_l1om | |
5331 | ||
5332 | #undef ELF_MACHINE_CODE | |
5333 | #define ELF_MACHINE_CODE EM_L1OM | |
5334 | ||
5335 | #undef ELF_OSABI | |
5336 | ||
5337 | #undef elf64_bed | |
5338 | #define elf64_bed elf64_l1om_bed | |
5339 | ||
5340 | #undef elf_backend_object_p | |
5341 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
5342 | ||
8059fb19 RM |
5343 | /* Restore defaults. */ |
5344 | #undef ELF_MAXPAGESIZE | |
5345 | #undef ELF_MINPAGESIZE | |
5346 | #undef ELF_COMMONPAGESIZE | |
f6aec96d L |
5347 | #if DEFAULT_LD_Z_SEPARATE_CODE |
5348 | # define ELF_MAXPAGESIZE 0x1000 | |
5349 | #else | |
5350 | # define ELF_MAXPAGESIZE 0x200000 | |
5351 | #endif | |
8059fb19 RM |
5352 | #define ELF_MINPAGESIZE 0x1000 |
5353 | #define ELF_COMMONPAGESIZE 0x1000 | |
5354 | #undef elf_backend_plt_alignment | |
5355 | #define elf_backend_plt_alignment 4 | |
5356 | #undef elf_backend_arch_data | |
5357 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 5358 | |
8a9036a4 L |
5359 | #include "elf64-target.h" |
5360 | ||
5361 | /* FreeBSD L1OM support. */ | |
5362 | ||
5363 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5364 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
5365 | #undef TARGET_LITTLE_NAME |
5366 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
5367 | ||
5368 | #undef ELF_OSABI | |
5369 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5370 | ||
5371 | #undef elf64_bed | |
5372 | #define elf64_bed elf64_l1om_fbsd_bed | |
5373 | ||
8a9036a4 | 5374 | #include "elf64-target.h" |
351f65ca | 5375 | |
7a9068fe L |
5376 | /* Intel K1OM support. */ |
5377 | ||
5378 | static bfd_boolean | |
5379 | elf64_k1om_elf_object_p (bfd *abfd) | |
5380 | { | |
5381 | /* Set the right machine number for an K1OM elf64 file. */ | |
5382 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
5383 | return TRUE; | |
5384 | } | |
5385 | ||
5386 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5387 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
5388 | #undef TARGET_LITTLE_NAME |
5389 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
5390 | #undef ELF_ARCH | |
5391 | #define ELF_ARCH bfd_arch_k1om | |
5392 | ||
5393 | #undef ELF_MACHINE_CODE | |
5394 | #define ELF_MACHINE_CODE EM_K1OM | |
5395 | ||
5396 | #undef ELF_OSABI | |
5397 | ||
5398 | #undef elf64_bed | |
5399 | #define elf64_bed elf64_k1om_bed | |
5400 | ||
5401 | #undef elf_backend_object_p | |
5402 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
5403 | ||
5404 | #undef elf_backend_static_tls_alignment | |
5405 | ||
5406 | #undef elf_backend_want_plt_sym | |
5407 | #define elf_backend_want_plt_sym 0 | |
5408 | ||
5409 | #include "elf64-target.h" | |
5410 | ||
5411 | /* FreeBSD K1OM support. */ | |
5412 | ||
5413 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5414 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
5415 | #undef TARGET_LITTLE_NAME |
5416 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
5417 | ||
5418 | #undef ELF_OSABI | |
5419 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5420 | ||
5421 | #undef elf64_bed | |
5422 | #define elf64_bed elf64_k1om_fbsd_bed | |
5423 | ||
5424 | #include "elf64-target.h" | |
5425 | ||
351f65ca L |
5426 | /* 32bit x86-64 support. */ |
5427 | ||
351f65ca | 5428 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5429 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
5430 | #undef TARGET_LITTLE_NAME |
5431 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 5432 | #undef elf32_bed |
351f65ca L |
5433 | |
5434 | #undef ELF_ARCH | |
5435 | #define ELF_ARCH bfd_arch_i386 | |
5436 | ||
5437 | #undef ELF_MACHINE_CODE | |
5438 | #define ELF_MACHINE_CODE EM_X86_64 | |
5439 | ||
351f65ca L |
5440 | #undef ELF_OSABI |
5441 | ||
351f65ca L |
5442 | #undef elf_backend_object_p |
5443 | #define elf_backend_object_p \ | |
5444 | elf32_x86_64_elf_object_p | |
5445 | ||
5446 | #undef elf_backend_bfd_from_remote_memory | |
5447 | #define elf_backend_bfd_from_remote_memory \ | |
5448 | _bfd_elf32_bfd_from_remote_memory | |
5449 | ||
5450 | #undef elf_backend_size_info | |
5451 | #define elf_backend_size_info \ | |
5452 | _bfd_elf32_size_info | |
5453 | ||
5454 | #include "elf32-target.h" |