Commit | Line | Data |
---|---|---|
351f65ca | 1 | /* X86-64 specific support for ELF |
2571583a | 2 | Copyright (C) 2000-2017 Free Software Foundation, Inc. |
8d88c4ca NC |
3 | Contributed by Jan Hubicka <jh@suse.cz>. |
4 | ||
ae9a127f | 5 | This file is part of BFD, the Binary File Descriptor library. |
8d88c4ca | 6 | |
ae9a127f NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
ae9a127f | 10 | (at your option) any later version. |
8d88c4ca | 11 | |
ae9a127f NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
8d88c4ca | 16 | |
ae9a127f NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
8d88c4ca | 21 | |
0afcef53 | 22 | #include "elfxx-x86.h" |
5a68afcf | 23 | #include "elf-nacl.h" |
e41b3a13 | 24 | #include "dwarf2.h" |
d7921315 | 25 | #include "libiberty.h" |
8d88c4ca | 26 | |
56ceb5b5 | 27 | #include "opcode/i386.h" |
8d88c4ca NC |
28 | #include "elf/x86-64.h" |
29 | ||
8fd79e71 L |
30 | #ifdef CORE_HEADER |
31 | #include <stdarg.h> | |
32 | #include CORE_HEADER | |
33 | #endif | |
34 | ||
8d88c4ca NC |
35 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
36 | #define MINUS_ONE (~ (bfd_vma) 0) | |
37 | ||
351f65ca L |
38 | /* Since both 32-bit and 64-bit x86-64 encode relocation type in the |
39 | identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get | |
40 | relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE | |
41 | since they are the same. */ | |
42 | ||
8d88c4ca | 43 | /* The relocation "howto" table. Order of fields: |
7b81dfbb AJ |
44 | type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow, |
45 | special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */ | |
70256ad8 AJ |
46 | static reloc_howto_type x86_64_elf_howto_table[] = |
47 | { | |
6346d5ca | 48 | HOWTO(R_X86_64_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont, |
b34976b6 AM |
49 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, |
50 | FALSE), | |
51 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
52 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, | |
53 | FALSE), | |
54 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
55 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, | |
56 | TRUE), | |
57 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
58 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, | |
59 | FALSE), | |
60 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
61 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, | |
62 | TRUE), | |
63 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
64 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, | |
65 | FALSE), | |
66 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
67 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, | |
68 | MINUS_ONE, FALSE), | |
69 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
70 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, | |
71 | MINUS_ONE, FALSE), | |
72 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
73 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, | |
74 | MINUS_ONE, FALSE), | |
75 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
76 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, | |
77 | 0xffffffff, TRUE), | |
78 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, | |
79 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
80 | FALSE), | |
81 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
82 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, | |
83 | FALSE), | |
84 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
85 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), | |
b0360d8c | 86 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
b34976b6 | 87 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), |
ac2aa337 | 88 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
b34976b6 AM |
89 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), |
90 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
91 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), | |
92 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
93 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, | |
94 | MINUS_ONE, FALSE), | |
95 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
96 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, | |
97 | MINUS_ONE, FALSE), | |
98 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
99 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, | |
100 | MINUS_ONE, FALSE), | |
101 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
102 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, | |
103 | 0xffffffff, TRUE), | |
104 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
105 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, | |
106 | 0xffffffff, TRUE), | |
ac2aa337 | 107 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
b34976b6 AM |
108 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, |
109 | 0xffffffff, FALSE), | |
110 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
111 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, | |
112 | 0xffffffff, TRUE), | |
113 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
114 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, | |
115 | 0xffffffff, FALSE), | |
d6ab8113 JB |
116 | HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
117 | bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE, | |
118 | TRUE), | |
119 | HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
120 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", | |
121 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
122 | HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
123 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", | |
124 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
7b81dfbb AJ |
125 | HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, |
126 | bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE, | |
127 | FALSE), | |
128 | HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
129 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE, | |
130 | MINUS_ONE, TRUE), | |
131 | HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
132 | bfd_elf_generic_reloc, "R_X86_64_GOTPC64", | |
133 | FALSE, MINUS_ONE, MINUS_ONE, TRUE), | |
134 | HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
135 | bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE, | |
136 | MINUS_ONE, FALSE), | |
137 | HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
138 | bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE, | |
139 | MINUS_ONE, FALSE), | |
1788fc08 L |
140 | HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, |
141 | bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff, | |
142 | FALSE), | |
143 | HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned, | |
144 | bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE, | |
145 | FALSE), | |
67a4f2b7 AO |
146 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0, |
147 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
148 | "R_X86_64_GOTPC32_TLSDESC", | |
149 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
150 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0, | |
151 | complain_overflow_dont, bfd_elf_generic_reloc, | |
152 | "R_X86_64_TLSDESC_CALL", | |
153 | FALSE, 0, 0, FALSE), | |
154 | HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0, | |
155 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
156 | "R_X86_64_TLSDESC", | |
157 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
cbe950e9 L |
158 | HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
159 | bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE, | |
160 | MINUS_ONE, FALSE), | |
64d25c44 L |
161 | HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
162 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE, | |
163 | MINUS_ONE, FALSE), | |
c3320543 L |
164 | HOWTO(R_X86_64_PC32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
165 | bfd_elf_generic_reloc, "R_X86_64_PC32_BND", FALSE, 0xffffffff, 0xffffffff, | |
166 | TRUE), | |
167 | HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
168 | bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", FALSE, 0xffffffff, 0xffffffff, | |
169 | TRUE), | |
56ceb5b5 L |
170 | HOWTO(R_X86_64_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
171 | bfd_elf_generic_reloc, "R_X86_64_GOTPCRELX", FALSE, 0xffffffff, | |
172 | 0xffffffff, TRUE), | |
173 | HOWTO(R_X86_64_REX_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
174 | bfd_elf_generic_reloc, "R_X86_64_REX_GOTPCRELX", FALSE, 0xffffffff, | |
175 | 0xffffffff, TRUE), | |
fe4770f4 | 176 | |
a33d77bc JB |
177 | /* We have a gap in the reloc numbers here. |
178 | R_X86_64_standard counts the number up to this point, and | |
179 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
180 | R_X86_64_GNU_VT* to form an index into this table. */ | |
56ceb5b5 | 181 | #define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1) |
a33d77bc JB |
182 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
183 | ||
fe4770f4 | 184 | /* GNU extension to record C++ vtable hierarchy. */ |
b34976b6 AM |
185 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
186 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
187 | |
188 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
189 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
190 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
d7921315 L |
191 | FALSE), |
192 | ||
193 | /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */ | |
194 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
195 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
196 | FALSE) | |
8d88c4ca NC |
197 | }; |
198 | ||
d8045f23 NC |
199 | #define IS_X86_64_PCREL_TYPE(TYPE) \ |
200 | ( ((TYPE) == R_X86_64_PC8) \ | |
201 | || ((TYPE) == R_X86_64_PC16) \ | |
202 | || ((TYPE) == R_X86_64_PC32) \ | |
c3320543 | 203 | || ((TYPE) == R_X86_64_PC32_BND) \ |
d8045f23 NC |
204 | || ((TYPE) == R_X86_64_PC64)) |
205 | ||
8d88c4ca | 206 | /* Map BFD relocs to the x86_64 elf relocs. */ |
70256ad8 AJ |
207 | struct elf_reloc_map |
208 | { | |
8d88c4ca NC |
209 | bfd_reloc_code_real_type bfd_reloc_val; |
210 | unsigned char elf_reloc_val; | |
211 | }; | |
212 | ||
dc810e39 | 213 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 214 | { |
70256ad8 AJ |
215 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
216 | { BFD_RELOC_64, R_X86_64_64, }, | |
217 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
218 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
219 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
220 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
221 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
222 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
223 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
224 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
225 | { BFD_RELOC_32, R_X86_64_32, }, | |
226 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
227 | { BFD_RELOC_16, R_X86_64_16, }, | |
228 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
229 | { BFD_RELOC_8, R_X86_64_8, }, | |
230 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
231 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
232 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
233 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
234 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
235 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
236 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
237 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
238 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
239 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
240 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
241 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
242 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
243 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
244 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
245 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
246 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
1788fc08 L |
247 | { BFD_RELOC_SIZE32, R_X86_64_SIZE32, }, |
248 | { BFD_RELOC_SIZE64, R_X86_64_SIZE64, }, | |
67a4f2b7 AO |
249 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
250 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
251 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
cbe950e9 | 252 | { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, }, |
56ceb5b5 L |
253 | { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND, }, |
254 | { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND, }, | |
255 | { BFD_RELOC_X86_64_GOTPCRELX, R_X86_64_GOTPCRELX, }, | |
256 | { BFD_RELOC_X86_64_REX_GOTPCRELX, R_X86_64_REX_GOTPCRELX, }, | |
fe4770f4 AJ |
257 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
258 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
259 | }; |
260 | ||
67a4f2b7 | 261 | static reloc_howto_type * |
351f65ca | 262 | elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) |
67a4f2b7 AO |
263 | { |
264 | unsigned i; | |
265 | ||
d7921315 L |
266 | if (r_type == (unsigned int) R_X86_64_32) |
267 | { | |
268 | if (ABI_64_P (abfd)) | |
269 | i = r_type; | |
270 | else | |
271 | i = ARRAY_SIZE (x86_64_elf_howto_table) - 1; | |
272 | } | |
273 | else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
274 | || r_type >= (unsigned int) R_X86_64_max) | |
67a4f2b7 AO |
275 | { |
276 | if (r_type >= (unsigned int) R_X86_64_standard) | |
277 | { | |
695344c0 | 278 | /* xgettext:c-format */ |
4eca0228 AM |
279 | _bfd_error_handler (_("%B: invalid relocation type %d"), |
280 | abfd, (int) r_type); | |
67a4f2b7 AO |
281 | r_type = R_X86_64_NONE; |
282 | } | |
283 | i = r_type; | |
284 | } | |
285 | else | |
286 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
287 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
288 | return &x86_64_elf_howto_table[i]; | |
289 | } | |
8d88c4ca NC |
290 | |
291 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
292 | static reloc_howto_type * | |
351f65ca L |
293 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
294 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
295 | { |
296 | unsigned int i; | |
27482721 | 297 | |
8d88c4ca NC |
298 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
299 | i++) | |
300 | { | |
301 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
302 | return elf_x86_64_rtype_to_howto (abfd, |
303 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca | 304 | } |
5860e3f8 | 305 | return NULL; |
8d88c4ca NC |
306 | } |
307 | ||
157090f7 | 308 | static reloc_howto_type * |
d7921315 | 309 | elf_x86_64_reloc_name_lookup (bfd *abfd, |
351f65ca | 310 | const char *r_name) |
157090f7 AM |
311 | { |
312 | unsigned int i; | |
313 | ||
d7921315 L |
314 | if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0) |
315 | { | |
316 | /* Get x32 R_X86_64_32. */ | |
317 | reloc_howto_type *reloc | |
318 | = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1]; | |
319 | BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32); | |
320 | return reloc; | |
321 | } | |
322 | ||
323 | for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++) | |
157090f7 AM |
324 | if (x86_64_elf_howto_table[i].name != NULL |
325 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
326 | return &x86_64_elf_howto_table[i]; | |
327 | ||
328 | return NULL; | |
329 | } | |
330 | ||
8d88c4ca | 331 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 332 | |
8d88c4ca | 333 | static void |
351f65ca L |
334 | elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
335 | Elf_Internal_Rela *dst) | |
8d88c4ca | 336 | { |
67a4f2b7 | 337 | unsigned r_type; |
8d88c4ca | 338 | |
351f65ca L |
339 | r_type = ELF32_R_TYPE (dst->r_info); |
340 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); | |
8d88c4ca NC |
341 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
342 | } | |
70256ad8 | 343 | \f |
3bab7989 | 344 | /* Support for core dump NOTE sections. */ |
b34976b6 | 345 | static bfd_boolean |
351f65ca | 346 | elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
347 | { |
348 | int offset; | |
eea6121a | 349 | size_t size; |
3bab7989 ML |
350 | |
351 | switch (note->descsz) | |
352 | { | |
353 | default: | |
b34976b6 | 354 | return FALSE; |
3bab7989 | 355 | |
bcd823f1 L |
356 | case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */ |
357 | /* pr_cursig */ | |
228e534f | 358 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
bcd823f1 L |
359 | |
360 | /* pr_pid */ | |
228e534f | 361 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
bcd823f1 L |
362 | |
363 | /* pr_reg */ | |
364 | offset = 72; | |
365 | size = 216; | |
366 | ||
367 | break; | |
368 | ||
3bab7989 ML |
369 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ |
370 | /* pr_cursig */ | |
228e534f | 371 | elf_tdata (abfd)->core->signal |
3bab7989 ML |
372 | = bfd_get_16 (abfd, note->descdata + 12); |
373 | ||
374 | /* pr_pid */ | |
228e534f | 375 | elf_tdata (abfd)->core->lwpid |
3bab7989 ML |
376 | = bfd_get_32 (abfd, note->descdata + 32); |
377 | ||
378 | /* pr_reg */ | |
379 | offset = 112; | |
eea6121a | 380 | size = 216; |
3bab7989 ML |
381 | |
382 | break; | |
383 | } | |
384 | ||
385 | /* Make a ".reg/999" section. */ | |
386 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 387 | size, note->descpos + offset); |
3bab7989 ML |
388 | } |
389 | ||
b34976b6 | 390 | static bfd_boolean |
351f65ca | 391 | elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
392 | { |
393 | switch (note->descsz) | |
394 | { | |
395 | default: | |
b34976b6 | 396 | return FALSE; |
3bab7989 | 397 | |
bcd823f1 | 398 | case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */ |
228e534f | 399 | elf_tdata (abfd)->core->pid |
bcd823f1 | 400 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 401 | elf_tdata (abfd)->core->program |
bcd823f1 | 402 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 403 | elf_tdata (abfd)->core->command |
bcd823f1 L |
404 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
405 | break; | |
406 | ||
3bab7989 | 407 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ |
228e534f | 408 | elf_tdata (abfd)->core->pid |
261b8d08 | 409 | = bfd_get_32 (abfd, note->descdata + 24); |
228e534f | 410 | elf_tdata (abfd)->core->program |
3bab7989 | 411 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
228e534f | 412 | elf_tdata (abfd)->core->command |
3bab7989 ML |
413 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
414 | } | |
415 | ||
416 | /* Note that for some reason, a spurious space is tacked | |
417 | onto the end of the args in some (at least one anyway) | |
418 | implementations, so strip it off if it exists. */ | |
419 | ||
420 | { | |
228e534f | 421 | char *command = elf_tdata (abfd)->core->command; |
3bab7989 ML |
422 | int n = strlen (command); |
423 | ||
424 | if (0 < n && command[n - 1] == ' ') | |
425 | command[n - 1] = '\0'; | |
426 | } | |
427 | ||
b34976b6 | 428 | return TRUE; |
3bab7989 | 429 | } |
8fd79e71 L |
430 | |
431 | #ifdef CORE_HEADER | |
432 | static char * | |
433 | elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz, | |
434 | int note_type, ...) | |
435 | { | |
436 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8fd79e71 L |
437 | va_list ap; |
438 | const char *fname, *psargs; | |
439 | long pid; | |
440 | int cursig; | |
441 | const void *gregs; | |
442 | ||
443 | switch (note_type) | |
444 | { | |
445 | default: | |
446 | return NULL; | |
447 | ||
448 | case NT_PRPSINFO: | |
449 | va_start (ap, note_type); | |
450 | fname = va_arg (ap, const char *); | |
451 | psargs = va_arg (ap, const char *); | |
452 | va_end (ap); | |
453 | ||
454 | if (bed->s->elfclass == ELFCLASS32) | |
455 | { | |
456 | prpsinfo32_t data; | |
457 | memset (&data, 0, sizeof (data)); | |
458 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
459 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
460 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
461 | &data, sizeof (data)); | |
8fd79e71 L |
462 | } |
463 | else | |
464 | { | |
b1bd052d | 465 | prpsinfo64_t data; |
8fd79e71 L |
466 | memset (&data, 0, sizeof (data)); |
467 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
468 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
469 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
470 | &data, sizeof (data)); | |
8fd79e71 | 471 | } |
e85c6a70 | 472 | /* NOTREACHED */ |
8fd79e71 L |
473 | |
474 | case NT_PRSTATUS: | |
475 | va_start (ap, note_type); | |
476 | pid = va_arg (ap, long); | |
477 | cursig = va_arg (ap, int); | |
478 | gregs = va_arg (ap, const void *); | |
479 | va_end (ap); | |
480 | ||
481 | if (bed->s->elfclass == ELFCLASS32) | |
482 | { | |
483 | if (bed->elf_machine_code == EM_X86_64) | |
484 | { | |
485 | prstatusx32_t prstat; | |
486 | memset (&prstat, 0, sizeof (prstat)); | |
487 | prstat.pr_pid = pid; | |
488 | prstat.pr_cursig = cursig; | |
489 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
490 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
491 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
492 | } |
493 | else | |
494 | { | |
495 | prstatus32_t prstat; | |
496 | memset (&prstat, 0, sizeof (prstat)); | |
497 | prstat.pr_pid = pid; | |
498 | prstat.pr_cursig = cursig; | |
499 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
500 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
501 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
502 | } |
503 | } | |
504 | else | |
505 | { | |
b1bd052d | 506 | prstatus64_t prstat; |
8fd79e71 L |
507 | memset (&prstat, 0, sizeof (prstat)); |
508 | prstat.pr_pid = pid; | |
509 | prstat.pr_cursig = cursig; | |
510 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
511 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
512 | &prstat, sizeof (prstat)); | |
8fd79e71 | 513 | } |
8fd79e71 | 514 | } |
e85c6a70 | 515 | /* NOTREACHED */ |
8fd79e71 L |
516 | } |
517 | #endif | |
3bab7989 | 518 | \f |
407443a3 | 519 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 520 | |
70256ad8 AJ |
521 | /* The size in bytes of an entry in the global offset table. */ |
522 | ||
523 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 524 | |
38b12349 | 525 | /* The size in bytes of an entry in the lazy procedure linkage table. */ |
8d88c4ca | 526 | |
38b12349 | 527 | #define LAZY_PLT_ENTRY_SIZE 16 |
70256ad8 | 528 | |
38b12349 L |
529 | /* The size in bytes of an entry in the non-lazy procedure linkage |
530 | table. */ | |
70256ad8 | 531 | |
38b12349 L |
532 | #define NON_LAZY_PLT_ENTRY_SIZE 8 |
533 | ||
534 | /* The first entry in a lazy procedure linkage table looks like this. | |
535 | See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this | |
536 | works. */ | |
537 | ||
538 | static const bfd_byte elf_x86_64_lazy_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
70256ad8 | 539 | { |
653165cc AJ |
540 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
541 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 542 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
543 | }; |
544 | ||
38b12349 | 545 | /* Subsequent entries in a lazy procedure linkage table look like this. */ |
70256ad8 | 546 | |
38b12349 | 547 | static const bfd_byte elf_x86_64_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
70256ad8 | 548 | { |
653165cc | 549 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 550 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 551 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
552 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
553 | 0xe9, /* jmp relative */ | |
554 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
555 | }; | |
556 | ||
38b12349 | 557 | /* The first entry in a lazy procedure linkage table with BND prefix |
0ff2b86e L |
558 | like this. */ |
559 | ||
38b12349 | 560 | static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e L |
561 | { |
562 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
563 | 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */ | |
564 | 0x0f, 0x1f, 0 /* nopl (%rax) */ | |
565 | }; | |
566 | ||
38b12349 L |
567 | /* Subsequent entries for branches with BND prefx in a lazy procedure |
568 | linkage table look like this. */ | |
0ff2b86e | 569 | |
38b12349 | 570 | static const bfd_byte elf_x86_64_lazy_bnd_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e L |
571 | { |
572 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
573 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
574 | 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */ | |
575 | }; | |
576 | ||
ee2fdd6f L |
577 | /* The first entry in the IBT-enabled lazy procedure linkage table is the |
578 | the same as the lazy PLT with BND prefix so that bound registers are | |
579 | preserved when control is passed to dynamic linker. Subsequent | |
580 | entries for a IBT-enabled lazy procedure linkage table look like | |
581 | this. */ | |
582 | ||
583 | static const bfd_byte elf_x86_64_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
584 | { | |
585 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
586 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
587 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
588 | 0x90 /* nop */ | |
589 | }; | |
590 | ||
591 | /* The first entry in the x32 IBT-enabled lazy procedure linkage table | |
de194d85 | 592 | is the same as the normal lazy PLT. Subsequent entries for an |
ee2fdd6f L |
593 | x32 IBT-enabled lazy procedure linkage table look like this. */ |
594 | ||
595 | static const bfd_byte elf_x32_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
596 | { | |
597 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
598 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
599 | 0xe9, 0, 0, 0, 0, /* jmpq relative */ | |
600 | 0x66, 0x90 /* xchg %ax,%ax */ | |
601 | }; | |
602 | ||
38b12349 | 603 | /* Entries in the non-lazey procedure linkage table look like this. */ |
0ff2b86e | 604 | |
38b12349 | 605 | static const bfd_byte elf_x86_64_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 606 | { |
38b12349 L |
607 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
608 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
609 | 0x66, 0x90 /* xchg %ax,%ax */ | |
0ff2b86e L |
610 | }; |
611 | ||
38b12349 L |
612 | /* Entries for branches with BND prefix in the non-lazey procedure |
613 | linkage table look like this. */ | |
0ff2b86e | 614 | |
38b12349 | 615 | static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 616 | { |
38b12349 L |
617 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ |
618 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
619 | 0x90 /* nop */ | |
0ff2b86e L |
620 | }; |
621 | ||
ee2fdd6f L |
622 | /* Entries for branches with IBT-enabled in the non-lazey procedure |
623 | linkage table look like this. They have the same size as the lazy | |
624 | PLT entry. */ | |
625 | ||
626 | static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
627 | { | |
628 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
629 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ | |
630 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
631 | 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */ | |
632 | }; | |
633 | ||
634 | /* Entries for branches with IBT-enabled in the x32 non-lazey procedure | |
635 | linkage table look like this. They have the same size as the lazy | |
636 | PLT entry. */ | |
637 | ||
638 | static const bfd_byte elf_x32_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
639 | { | |
640 | 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ | |
641 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ | |
642 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
643 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
644 | }; | |
645 | ||
38b12349 | 646 | /* .eh_frame covering the lazy .plt section. */ |
e41b3a13 | 647 | |
38b12349 | 648 | static const bfd_byte elf_x86_64_eh_frame_lazy_plt[] = |
e41b3a13 JJ |
649 | { |
650 | #define PLT_CIE_LENGTH 20 | |
651 | #define PLT_FDE_LENGTH 36 | |
652 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
653 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
654 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
655 | 0, 0, 0, 0, /* CIE ID */ | |
656 | 1, /* CIE version */ | |
657 | 'z', 'R', 0, /* Augmentation string */ | |
658 | 1, /* Code alignment factor */ | |
659 | 0x78, /* Data alignment factor */ | |
660 | 16, /* Return address column */ | |
661 | 1, /* Augmentation size */ | |
662 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
663 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
664 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
665 | DW_CFA_nop, DW_CFA_nop, | |
666 | ||
667 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
668 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
669 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
670 | 0, 0, 0, 0, /* .plt size goes here */ | |
671 | 0, /* Augmentation size */ | |
672 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
673 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
674 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
675 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
676 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
677 | 11, /* Block length */ | |
678 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
679 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
680 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
681 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
682 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
683 | }; | |
684 | ||
38b12349 | 685 | /* .eh_frame covering the lazy BND .plt section. */ |
9e659176 | 686 | |
38b12349 | 687 | static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt[] = |
9e659176 L |
688 | { |
689 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
690 | 0, 0, 0, 0, /* CIE ID */ | |
691 | 1, /* CIE version */ | |
692 | 'z', 'R', 0, /* Augmentation string */ | |
693 | 1, /* Code alignment factor */ | |
694 | 0x78, /* Data alignment factor */ | |
695 | 16, /* Return address column */ | |
696 | 1, /* Augmentation size */ | |
697 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
698 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
699 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
700 | DW_CFA_nop, DW_CFA_nop, | |
701 | ||
702 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
703 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
704 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
705 | 0, 0, 0, 0, /* .plt size goes here */ | |
706 | 0, /* Augmentation size */ | |
707 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
708 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
709 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
710 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
711 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
712 | 11, /* Block length */ | |
713 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
714 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
715 | DW_OP_lit15, DW_OP_and, DW_OP_lit5, DW_OP_ge, | |
716 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
717 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
718 | }; | |
719 | ||
ee2fdd6f L |
720 | /* .eh_frame covering the lazy .plt section with IBT-enabled. */ |
721 | ||
722 | static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt[] = | |
723 | { | |
724 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
725 | 0, 0, 0, 0, /* CIE ID */ | |
726 | 1, /* CIE version */ | |
727 | 'z', 'R', 0, /* Augmentation string */ | |
728 | 1, /* Code alignment factor */ | |
729 | 0x78, /* Data alignment factor */ | |
730 | 16, /* Return address column */ | |
731 | 1, /* Augmentation size */ | |
732 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
733 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
734 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
735 | DW_CFA_nop, DW_CFA_nop, | |
736 | ||
737 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
738 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
739 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
740 | 0, 0, 0, 0, /* .plt size goes here */ | |
741 | 0, /* Augmentation size */ | |
742 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
743 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
744 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
745 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
746 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
747 | 11, /* Block length */ | |
748 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
749 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
750 | DW_OP_lit15, DW_OP_and, DW_OP_lit10, DW_OP_ge, | |
751 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
752 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
753 | }; | |
754 | ||
755 | /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */ | |
756 | ||
757 | static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt[] = | |
758 | { | |
759 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
760 | 0, 0, 0, 0, /* CIE ID */ | |
761 | 1, /* CIE version */ | |
762 | 'z', 'R', 0, /* Augmentation string */ | |
763 | 1, /* Code alignment factor */ | |
764 | 0x78, /* Data alignment factor */ | |
765 | 16, /* Return address column */ | |
766 | 1, /* Augmentation size */ | |
767 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
768 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
769 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
770 | DW_CFA_nop, DW_CFA_nop, | |
771 | ||
772 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
773 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
774 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
775 | 0, 0, 0, 0, /* .plt size goes here */ | |
776 | 0, /* Augmentation size */ | |
777 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
778 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
779 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
780 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
781 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
782 | 11, /* Block length */ | |
783 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
784 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
785 | DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge, | |
786 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
787 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
788 | }; | |
789 | ||
38b12349 | 790 | /* .eh_frame covering the non-lazy .plt section. */ |
fff53dae | 791 | |
38b12349 | 792 | static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt[] = |
fff53dae L |
793 | { |
794 | #define PLT_GOT_FDE_LENGTH 20 | |
795 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
796 | 0, 0, 0, 0, /* CIE ID */ | |
797 | 1, /* CIE version */ | |
798 | 'z', 'R', 0, /* Augmentation string */ | |
799 | 1, /* Code alignment factor */ | |
800 | 0x78, /* Data alignment factor */ | |
801 | 16, /* Return address column */ | |
802 | 1, /* Augmentation size */ | |
803 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
804 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
805 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
806 | DW_CFA_nop, DW_CFA_nop, | |
807 | ||
808 | PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
809 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
38b12349 L |
810 | 0, 0, 0, 0, /* the start of non-lazy .plt goes here */ |
811 | 0, 0, 0, 0, /* non-lazy .plt size goes here */ | |
fff53dae L |
812 | 0, /* Augmentation size */ |
813 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, | |
814 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
815 | }; | |
816 | ||
38b12349 L |
817 | /* Architecture-specific backend data for x86-64. */ |
818 | ||
819 | struct elf_x86_64_backend_data | |
820 | { | |
821 | /* Target system. */ | |
822 | enum | |
823 | { | |
824 | is_normal, | |
825 | is_nacl | |
826 | } os; | |
eed180f8 RM |
827 | }; |
828 | ||
f8222080 L |
829 | #define get_elf_x86_64_arch_data(bed) \ |
830 | ((const struct elf_x86_64_backend_data *) (bed)->arch_data) | |
831 | ||
eed180f8 | 832 | #define get_elf_x86_64_backend_data(abfd) \ |
f8222080 | 833 | get_elf_x86_64_arch_data (get_elf_backend_data (abfd)) |
eed180f8 | 834 | |
eed180f8 | 835 | /* These are the standard parameters. */ |
765e526c | 836 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt = |
eed180f8 | 837 | { |
38b12349 | 838 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ |
765e526c | 839 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
38b12349 L |
840 | elf_x86_64_lazy_plt_entry, /* plt_entry */ |
841 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
eed180f8 RM |
842 | 2, /* plt0_got1_offset */ |
843 | 8, /* plt0_got2_offset */ | |
844 | 12, /* plt0_got2_insn_end */ | |
845 | 2, /* plt_got_offset */ | |
846 | 7, /* plt_reloc_offset */ | |
847 | 12, /* plt_plt_offset */ | |
848 | 6, /* plt_got_insn_size */ | |
38b12349 | 849 | LAZY_PLT_ENTRY_SIZE, /* plt_plt_insn_end */ |
eed180f8 | 850 | 6, /* plt_lazy_offset */ |
a6798bab L |
851 | elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */ |
852 | elf_x86_64_lazy_plt_entry, /* pic_plt_entry */ | |
38b12349 L |
853 | elf_x86_64_eh_frame_lazy_plt, /* eh_frame_plt */ |
854 | sizeof (elf_x86_64_eh_frame_lazy_plt) /* eh_frame_plt_size */ | |
855 | }; | |
856 | ||
765e526c | 857 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_plt = |
38b12349 L |
858 | { |
859 | elf_x86_64_non_lazy_plt_entry, /* plt_entry */ | |
a6798bab | 860 | elf_x86_64_non_lazy_plt_entry, /* pic_plt_entry */ |
38b12349 L |
861 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
862 | 2, /* plt_got_offset */ | |
863 | 6, /* plt_got_insn_size */ | |
864 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
865 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
eed180f8 RM |
866 | }; |
867 | ||
765e526c | 868 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_bnd_plt = |
0ff2b86e | 869 | { |
38b12349 | 870 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ |
765e526c | 871 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
38b12349 L |
872 | elf_x86_64_lazy_bnd_plt_entry, /* plt_entry */ |
873 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
0ff2b86e L |
874 | 2, /* plt0_got1_offset */ |
875 | 1+8, /* plt0_got2_offset */ | |
876 | 1+12, /* plt0_got2_insn_end */ | |
877 | 1+2, /* plt_got_offset */ | |
878 | 1, /* plt_reloc_offset */ | |
879 | 7, /* plt_plt_offset */ | |
880 | 1+6, /* plt_got_insn_size */ | |
881 | 11, /* plt_plt_insn_end */ | |
882 | 0, /* plt_lazy_offset */ | |
a6798bab L |
883 | elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */ |
884 | elf_x86_64_lazy_bnd_plt_entry, /* pic_plt_entry */ | |
38b12349 L |
885 | elf_x86_64_eh_frame_lazy_bnd_plt, /* eh_frame_plt */ |
886 | sizeof (elf_x86_64_eh_frame_lazy_bnd_plt) /* eh_frame_plt_size */ | |
887 | }; | |
888 | ||
765e526c | 889 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt = |
38b12349 L |
890 | { |
891 | elf_x86_64_non_lazy_bnd_plt_entry, /* plt_entry */ | |
a6798bab | 892 | elf_x86_64_non_lazy_bnd_plt_entry, /* pic_plt_entry */ |
38b12349 L |
893 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
894 | 1+2, /* plt_got_offset */ | |
895 | 1+6, /* plt_got_insn_size */ | |
896 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
897 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
898 | }; | |
899 | ||
765e526c | 900 | static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt = |
ee2fdd6f L |
901 | { |
902 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ | |
765e526c | 903 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
ee2fdd6f L |
904 | elf_x86_64_lazy_ibt_plt_entry, /* plt_entry */ |
905 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
906 | 2, /* plt0_got1_offset */ | |
907 | 1+8, /* plt0_got2_offset */ | |
908 | 1+12, /* plt0_got2_insn_end */ | |
909 | 4+1+2, /* plt_got_offset */ | |
910 | 4+1, /* plt_reloc_offset */ | |
911 | 4+1+6, /* plt_plt_offset */ | |
912 | 4+1+6, /* plt_got_insn_size */ | |
913 | 4+1+5+5, /* plt_plt_insn_end */ | |
914 | 0, /* plt_lazy_offset */ | |
a6798bab L |
915 | elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */ |
916 | elf_x86_64_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
ee2fdd6f L |
917 | elf_x86_64_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ |
918 | sizeof (elf_x86_64_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ | |
919 | }; | |
920 | ||
765e526c | 921 | static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt = |
ee2fdd6f L |
922 | { |
923 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ | |
765e526c | 924 | LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
ee2fdd6f L |
925 | elf_x32_lazy_ibt_plt_entry, /* plt_entry */ |
926 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
927 | 2, /* plt0_got1_offset */ | |
928 | 8, /* plt0_got2_offset */ | |
929 | 12, /* plt0_got2_insn_end */ | |
930 | 4+2, /* plt_got_offset */ | |
931 | 4+1, /* plt_reloc_offset */ | |
932 | 4+6, /* plt_plt_offset */ | |
933 | 4+6, /* plt_got_insn_size */ | |
934 | 4+5+5, /* plt_plt_insn_end */ | |
935 | 0, /* plt_lazy_offset */ | |
a6798bab L |
936 | elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */ |
937 | elf_x32_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
ee2fdd6f L |
938 | elf_x32_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ |
939 | sizeof (elf_x32_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ | |
940 | }; | |
941 | ||
765e526c | 942 | static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt = |
ee2fdd6f L |
943 | { |
944 | elf_x86_64_non_lazy_ibt_plt_entry, /* plt_entry */ | |
a6798bab | 945 | elf_x86_64_non_lazy_ibt_plt_entry, /* pic_plt_entry */ |
ee2fdd6f L |
946 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
947 | 4+1+2, /* plt_got_offset */ | |
948 | 4+1+6, /* plt_got_insn_size */ | |
949 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
950 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
951 | }; | |
952 | ||
765e526c | 953 | static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt = |
ee2fdd6f L |
954 | { |
955 | elf_x32_non_lazy_ibt_plt_entry, /* plt_entry */ | |
a6798bab | 956 | elf_x32_non_lazy_ibt_plt_entry, /* pic_plt_entry */ |
ee2fdd6f L |
957 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
958 | 4+2, /* plt_got_offset */ | |
959 | 4+6, /* plt_got_insn_size */ | |
960 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
961 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
962 | }; | |
963 | ||
38b12349 L |
964 | static const struct elf_x86_64_backend_data elf_x86_64_arch_bed = |
965 | { | |
966 | is_normal /* os */ | |
0ff2b86e L |
967 | }; |
968 | ||
eed180f8 RM |
969 | #define elf_backend_arch_data &elf_x86_64_arch_bed |
970 | ||
0afcef53 | 971 | /* Values in tls_type of x86 ELF linker hash entry. */ |
bffbf940 | 972 | #define GOT_TLS_IE 3 |
67a4f2b7 AO |
973 | #define GOT_TLS_GDESC 4 |
974 | #define GOT_TLS_GD_BOTH_P(type) \ | |
975 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
976 | #define GOT_TLS_GD_P(type) \ | |
977 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
978 | #define GOT_TLS_GDESC_P(type) \ | |
979 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
980 | #define GOT_TLS_GD_ANY_P(type) \ | |
981 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
bffbf940 | 982 | |
0ffa91dd NC |
983 | #define is_x86_64_elf(bfd) \ |
984 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
985 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 986 | && elf_object_id (bfd) == X86_64_ELF_DATA) |
0ffa91dd | 987 | |
0afcef53 L |
988 | #define elf_x86_64_compute_jump_table_size(htab) \ |
989 | ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE) | |
68faa637 | 990 | |
b34976b6 | 991 | static bfd_boolean |
27482721 | 992 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 993 | { |
8d88c4ca NC |
994 | /* Set the right machine number for an x86-64 elf64 file. */ |
995 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 996 | return TRUE; |
8d88c4ca NC |
997 | } |
998 | ||
8059fb19 RM |
999 | static bfd_boolean |
1000 | elf32_x86_64_elf_object_p (bfd *abfd) | |
1001 | { | |
1002 | /* Set the right machine number for an x86-64 elf32 file. */ | |
1003 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
1004 | return TRUE; | |
1005 | } | |
1006 | ||
142411ca L |
1007 | /* Return TRUE if the TLS access code sequence support transition |
1008 | from R_TYPE. */ | |
1009 | ||
1010 | static bfd_boolean | |
351f65ca L |
1011 | elf_x86_64_check_tls_transition (bfd *abfd, |
1012 | struct bfd_link_info *info, | |
1013 | asection *sec, | |
1014 | bfd_byte *contents, | |
1015 | Elf_Internal_Shdr *symtab_hdr, | |
1016 | struct elf_link_hash_entry **sym_hashes, | |
1017 | unsigned int r_type, | |
1018 | const Elf_Internal_Rela *rel, | |
1019 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1020 | { |
142411ca L |
1021 | unsigned int val; |
1022 | unsigned long r_symndx; | |
5c98a14e | 1023 | bfd_boolean largepic = FALSE; |
142411ca L |
1024 | struct elf_link_hash_entry *h; |
1025 | bfd_vma offset; | |
0afcef53 | 1026 | struct elf_x86_link_hash_table *htab; |
e2cbcd91 | 1027 | bfd_byte *call; |
1d4af308 | 1028 | bfd_boolean indirect_call; |
142411ca | 1029 | |
0afcef53 | 1030 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
142411ca | 1031 | offset = rel->r_offset; |
bffbf940 | 1032 | switch (r_type) |
142411ca L |
1033 | { |
1034 | case R_X86_64_TLSGD: | |
1035 | case R_X86_64_TLSLD: | |
1036 | if ((rel + 1) >= relend) | |
1037 | return FALSE; | |
1038 | ||
1039 | if (r_type == R_X86_64_TLSGD) | |
1040 | { | |
52bc799a | 1041 | /* Check transition from GD access model. For 64bit, only |
142411ca | 1042 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
e2cbcd91 L |
1043 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1044 | or | |
1045 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
1046 | .byte 0x66; rex64 | |
1047 | call *__tls_get_addr@GOTPCREL(%rip) | |
1048 | which may be converted to | |
1049 | addr32 call __tls_get_addr | |
52bc799a L |
1050 | can transit to different access model. For 32bit, only |
1051 | leaq foo@tlsgd(%rip), %rdi | |
e2cbcd91 L |
1052 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1053 | or | |
1054 | leaq foo@tlsgd(%rip), %rdi | |
1055 | .byte 0x66; rex64 | |
1056 | call *__tls_get_addr@GOTPCREL(%rip) | |
1057 | which may be converted to | |
1058 | addr32 call __tls_get_addr | |
1059 | can transit to different access model. For largepic, | |
5c98a14e | 1060 | we also support: |
e2cbcd91 L |
1061 | leaq foo@tlsgd(%rip), %rdi |
1062 | movabsq $__tls_get_addr@pltoff, %rax | |
1063 | addq $r15, %rax | |
1064 | call *%rax | |
1065 | or | |
5c98a14e JJ |
1066 | leaq foo@tlsgd(%rip), %rdi |
1067 | movabsq $__tls_get_addr@pltoff, %rax | |
1068 | addq $rbx, %rax | |
e2cbcd91 | 1069 | call *%rax */ |
142411ca | 1070 | |
fa289a5f AM |
1071 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; |
1072 | ||
5c98a14e | 1073 | if ((offset + 12) > sec->size) |
142411ca | 1074 | return FALSE; |
52bc799a | 1075 | |
e2cbcd91 L |
1076 | call = contents + offset + 4; |
1077 | if (call[0] != 0x66 | |
1078 | || !((call[1] == 0x48 | |
1079 | && call[2] == 0xff | |
1080 | && call[3] == 0x15) | |
1081 | || (call[1] == 0x48 | |
1082 | && call[2] == 0x67 | |
1083 | && call[3] == 0xe8) | |
1084 | || (call[1] == 0x66 | |
1085 | && call[2] == 0x48 | |
1086 | && call[3] == 0xe8))) | |
5c98a14e JJ |
1087 | { |
1088 | if (!ABI_64_P (abfd) | |
1089 | || (offset + 19) > sec->size | |
1090 | || offset < 3 | |
e2cbcd91 L |
1091 | || memcmp (call - 7, leaq + 1, 3) != 0 |
1092 | || memcmp (call, "\x48\xb8", 2) != 0 | |
1093 | || call[11] != 0x01 | |
1094 | || call[13] != 0xff | |
1095 | || call[14] != 0xd0 | |
1096 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1097 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1098 | return FALSE; |
1099 | largepic = TRUE; | |
1100 | } | |
1101 | else if (ABI_64_P (abfd)) | |
52bc799a | 1102 | { |
52bc799a | 1103 | if (offset < 4 |
fa289a5f | 1104 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1105 | return FALSE; |
1106 | } | |
1107 | else | |
1108 | { | |
52bc799a | 1109 | if (offset < 3 |
fa289a5f | 1110 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1111 | return FALSE; |
1112 | } | |
e2cbcd91 | 1113 | indirect_call = call[2] == 0xff; |
142411ca L |
1114 | } |
1115 | else | |
1116 | { | |
1117 | /* Check transition from LD access model. Only | |
1118 | leaq foo@tlsld(%rip), %rdi; | |
e2cbcd91 L |
1119 | call __tls_get_addr@PLT |
1120 | or | |
1121 | leaq foo@tlsld(%rip), %rdi; | |
1122 | call *__tls_get_addr@GOTPCREL(%rip) | |
1123 | which may be converted to | |
1124 | addr32 call __tls_get_addr | |
5c98a14e JJ |
1125 | can transit to different access model. For largepic |
1126 | we also support: | |
e2cbcd91 L |
1127 | leaq foo@tlsld(%rip), %rdi |
1128 | movabsq $__tls_get_addr@pltoff, %rax | |
1129 | addq $r15, %rax | |
1130 | call *%rax | |
1131 | or | |
5c98a14e JJ |
1132 | leaq foo@tlsld(%rip), %rdi |
1133 | movabsq $__tls_get_addr@pltoff, %rax | |
1134 | addq $rbx, %rax | |
e2cbcd91 | 1135 | call *%rax */ |
142411ca | 1136 | |
fa289a5f | 1137 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1138 | |
1139 | if (offset < 3 || (offset + 9) > sec->size) | |
1140 | return FALSE; | |
1141 | ||
5c98a14e | 1142 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
142411ca | 1143 | return FALSE; |
5c98a14e | 1144 | |
e2cbcd91 L |
1145 | call = contents + offset + 4; |
1146 | if (!(call[0] == 0xe8 | |
1147 | || (call[0] == 0xff && call[1] == 0x15) | |
1148 | || (call[0] == 0x67 && call[1] == 0xe8))) | |
5c98a14e JJ |
1149 | { |
1150 | if (!ABI_64_P (abfd) | |
1151 | || (offset + 19) > sec->size | |
e2cbcd91 L |
1152 | || memcmp (call, "\x48\xb8", 2) != 0 |
1153 | || call[11] != 0x01 | |
1154 | || call[13] != 0xff | |
1155 | || call[14] != 0xd0 | |
1156 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1157 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1158 | return FALSE; |
1159 | largepic = TRUE; | |
1160 | } | |
e2cbcd91 | 1161 | indirect_call = call[0] == 0xff; |
142411ca L |
1162 | } |
1163 | ||
351f65ca | 1164 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1165 | if (r_symndx < symtab_hdr->sh_info) |
1166 | return FALSE; | |
1167 | ||
1168 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1d4af308 | 1169 | if (h == NULL |
0afcef53 | 1170 | || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr) |
e2cbcd91 L |
1171 | return FALSE; |
1172 | else if (largepic) | |
1173 | return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64; | |
1174 | else if (indirect_call) | |
1175 | return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_GOTPCRELX; | |
1176 | else | |
1177 | return (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32 | |
1178 | || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
142411ca L |
1179 | |
1180 | case R_X86_64_GOTTPOFF: | |
1181 | /* Check transition from IE access model: | |
4a4c5f25 L |
1182 | mov foo@gottpoff(%rip), %reg |
1183 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1184 | */ |
1185 | ||
4a4c5f25 L |
1186 | /* Check REX prefix first. */ |
1187 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1188 | { | |
1189 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1190 | if (val != 0x48 && val != 0x4c) | |
1191 | { | |
1192 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1193 | if (ABI_64_P (abfd)) | |
1194 | return FALSE; | |
1195 | } | |
1196 | } | |
1197 | else | |
1198 | { | |
1199 | /* X32 may not have any REX prefix. */ | |
1200 | if (ABI_64_P (abfd)) | |
1201 | return FALSE; | |
1202 | if (offset < 2 || (offset + 3) > sec->size) | |
1203 | return FALSE; | |
1204 | } | |
142411ca L |
1205 | |
1206 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1207 | if (val != 0x8b && val != 0x03) | |
1208 | return FALSE; | |
1209 | ||
1210 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1211 | return (val & 0xc7) == 5; | |
1212 | ||
1213 | case R_X86_64_GOTPC32_TLSDESC: | |
1214 | /* Check transition from GDesc access model: | |
1215 | leaq x@tlsdesc(%rip), %rax | |
1216 | ||
1217 | Make sure it's a leaq adding rip to a 32-bit offset | |
1218 | into any register, although it's probably almost always | |
1219 | going to be rax. */ | |
1220 | ||
1221 | if (offset < 3 || (offset + 4) > sec->size) | |
1222 | return FALSE; | |
1223 | ||
1224 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1225 | if ((val & 0xfb) != 0x48) | |
1226 | return FALSE; | |
1227 | ||
1228 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1229 | return FALSE; | |
1230 | ||
1231 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1232 | return (val & 0xc7) == 0x05; | |
1233 | ||
1234 | case R_X86_64_TLSDESC_CALL: | |
1235 | /* Check transition from GDesc access model: | |
1236 | call *x@tlsdesc(%rax) | |
1237 | */ | |
1238 | if (offset + 2 <= sec->size) | |
1239 | { | |
1240 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
e2cbcd91 L |
1241 | call = contents + offset; |
1242 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1243 | } |
1244 | ||
1245 | return FALSE; | |
1246 | ||
1247 | default: | |
1248 | abort (); | |
1249 | } | |
1250 | } | |
1251 | ||
1252 | /* Return TRUE if the TLS access transition is OK or no transition | |
1253 | will be performed. Update R_TYPE if there is a transition. */ | |
1254 | ||
1255 | static bfd_boolean | |
351f65ca L |
1256 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1257 | asection *sec, bfd_byte *contents, | |
1258 | Elf_Internal_Shdr *symtab_hdr, | |
1259 | struct elf_link_hash_entry **sym_hashes, | |
1260 | unsigned int *r_type, int tls_type, | |
1261 | const Elf_Internal_Rela *rel, | |
1262 | const Elf_Internal_Rela *relend, | |
1263 | struct elf_link_hash_entry *h, | |
bedfd056 L |
1264 | unsigned long r_symndx, |
1265 | bfd_boolean from_relocate_section) | |
142411ca L |
1266 | { |
1267 | unsigned int from_type = *r_type; | |
1268 | unsigned int to_type = from_type; | |
1269 | bfd_boolean check = TRUE; | |
1270 | ||
bb1cb422 L |
1271 | /* Skip TLS transition for functions. */ |
1272 | if (h != NULL | |
1273 | && (h->type == STT_FUNC | |
1274 | || h->type == STT_GNU_IFUNC)) | |
1275 | return TRUE; | |
1276 | ||
142411ca | 1277 | switch (from_type) |
bffbf940 JJ |
1278 | { |
1279 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1280 | case R_X86_64_GOTPC32_TLSDESC: |
1281 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1282 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1283 | if (bfd_link_executable (info)) |
142411ca L |
1284 | { |
1285 | if (h == NULL) | |
1286 | to_type = R_X86_64_TPOFF32; | |
1287 | else | |
1288 | to_type = R_X86_64_GOTTPOFF; | |
1289 | } | |
1290 | ||
bedfd056 L |
1291 | /* When we are called from elf_x86_64_relocate_section, there may |
1292 | be additional transitions based on TLS_TYPE. */ | |
1293 | if (from_relocate_section) | |
142411ca L |
1294 | { |
1295 | unsigned int new_to_type = to_type; | |
1296 | ||
0e1862bb | 1297 | if (bfd_link_executable (info) |
142411ca L |
1298 | && h != NULL |
1299 | && h->dynindx == -1 | |
1300 | && tls_type == GOT_TLS_IE) | |
1301 | new_to_type = R_X86_64_TPOFF32; | |
1302 | ||
1303 | if (to_type == R_X86_64_TLSGD | |
1304 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1305 | || to_type == R_X86_64_TLSDESC_CALL) | |
1306 | { | |
1307 | if (tls_type == GOT_TLS_IE) | |
1308 | new_to_type = R_X86_64_GOTTPOFF; | |
1309 | } | |
1310 | ||
1311 | /* We checked the transition before when we were called from | |
351f65ca | 1312 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1313 | transition which hasn't been checked before. */ |
1314 | check = new_to_type != to_type && from_type == to_type; | |
1315 | to_type = new_to_type; | |
1316 | } | |
1317 | ||
1318 | break; | |
1319 | ||
bffbf940 | 1320 | case R_X86_64_TLSLD: |
0e1862bb | 1321 | if (bfd_link_executable (info)) |
142411ca L |
1322 | to_type = R_X86_64_TPOFF32; |
1323 | break; | |
1324 | ||
1325 | default: | |
1326 | return TRUE; | |
bffbf940 JJ |
1327 | } |
1328 | ||
142411ca L |
1329 | /* Return TRUE if there is no transition. */ |
1330 | if (from_type == to_type) | |
1331 | return TRUE; | |
1332 | ||
1333 | /* Check if the transition can be performed. */ | |
1334 | if (check | |
351f65ca L |
1335 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1336 | symtab_hdr, sym_hashes, | |
1337 | from_type, rel, relend)) | |
142411ca | 1338 | { |
2f629d23 | 1339 | reloc_howto_type *from, *to; |
4c544807 | 1340 | const char *name; |
142411ca | 1341 | |
351f65ca L |
1342 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1343 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1344 | |
4c544807 L |
1345 | if (h) |
1346 | name = h->root.root.string; | |
1347 | else | |
1348 | { | |
0afcef53 | 1349 | struct elf_x86_link_hash_table *htab; |
4dfe6ac6 | 1350 | |
0afcef53 | 1351 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
1352 | if (htab == NULL) |
1353 | name = "*unknown*"; | |
1354 | else | |
1355 | { | |
1356 | Elf_Internal_Sym *isym; | |
1357 | ||
1358 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1359 | abfd, r_symndx); | |
1360 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1361 | } | |
4c544807 L |
1362 | } |
1363 | ||
4eca0228 | 1364 | _bfd_error_handler |
695344c0 | 1365 | /* xgettext:c-format */ |
d42c267e | 1366 | (_("%B: TLS transition from %s to %s against `%s' at %#Lx " |
142411ca | 1367 | "in section `%A' failed"), |
d42c267e | 1368 | abfd, from->name, to->name, name, rel->r_offset, sec); |
142411ca L |
1369 | bfd_set_error (bfd_error_bad_value); |
1370 | return FALSE; | |
1371 | } | |
1372 | ||
1373 | *r_type = to_type; | |
1374 | return TRUE; | |
bffbf940 JJ |
1375 | } |
1376 | ||
c1d11331 L |
1377 | /* Rename some of the generic section flags to better document how they |
1378 | are used here. */ | |
338c190a L |
1379 | #define need_convert_load sec_flg0 |
1380 | #define check_relocs_failed sec_flg1 | |
1381 | ||
1382 | static bfd_boolean | |
aab921ad L |
1383 | elf_x86_64_need_pic (struct bfd_link_info *info, |
1384 | bfd *input_bfd, asection *sec, | |
338c190a L |
1385 | struct elf_link_hash_entry *h, |
1386 | Elf_Internal_Shdr *symtab_hdr, | |
1387 | Elf_Internal_Sym *isym, | |
1388 | reloc_howto_type *howto) | |
1389 | { | |
1390 | const char *v = ""; | |
1391 | const char *und = ""; | |
1392 | const char *pic = ""; | |
aab921ad | 1393 | const char *object; |
338c190a L |
1394 | |
1395 | const char *name; | |
1396 | if (h) | |
1397 | { | |
1398 | name = h->root.root.string; | |
1399 | switch (ELF_ST_VISIBILITY (h->other)) | |
1400 | { | |
1401 | case STV_HIDDEN: | |
1402 | v = _("hidden symbol "); | |
1403 | break; | |
1404 | case STV_INTERNAL: | |
1405 | v = _("internal symbol "); | |
1406 | break; | |
1407 | case STV_PROTECTED: | |
1408 | v = _("protected symbol "); | |
1409 | break; | |
1410 | default: | |
0afcef53 | 1411 | if (((struct elf_x86_link_hash_entry *) h)->def_protected) |
a5b4ee94 L |
1412 | v = _("protected symbol "); |
1413 | else | |
1414 | v = _("symbol "); | |
338c190a L |
1415 | pic = _("; recompile with -fPIC"); |
1416 | break; | |
1417 | } | |
1418 | ||
1419 | if (!h->def_regular && !h->def_dynamic) | |
1420 | und = _("undefined "); | |
1421 | } | |
1422 | else | |
1423 | { | |
1424 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL); | |
1425 | pic = _("; recompile with -fPIC"); | |
1426 | } | |
1427 | ||
aab921ad L |
1428 | if (bfd_link_dll (info)) |
1429 | object = _("a shared object"); | |
1430 | else if (bfd_link_pie (info)) | |
1431 | object = _("a PIE object"); | |
1432 | else | |
1433 | object = _("a PDE object"); | |
1434 | ||
695344c0 | 1435 | /* xgettext:c-format */ |
4eca0228 | 1436 | _bfd_error_handler (_("%B: relocation %s against %s%s`%s' can " |
aab921ad L |
1437 | "not be used when making %s%s"), |
1438 | input_bfd, howto->name, und, v, name, | |
1439 | object, pic); | |
338c190a L |
1440 | bfd_set_error (bfd_error_bad_value); |
1441 | sec->check_relocs_failed = 1; | |
1442 | return FALSE; | |
1443 | } | |
c1d11331 | 1444 | |
c175a657 L |
1445 | /* With the local symbol, foo, we convert |
1446 | mov foo@GOTPCREL(%rip), %reg | |
1447 | to | |
1448 | lea foo(%rip), %reg | |
1449 | and convert | |
1450 | call/jmp *foo@GOTPCREL(%rip) | |
1451 | to | |
1452 | nop call foo/jmp foo nop | |
1453 | When PIC is false, convert | |
1454 | test %reg, foo@GOTPCREL(%rip) | |
1455 | to | |
1456 | test $foo, %reg | |
1457 | and convert | |
1458 | binop foo@GOTPCREL(%rip), %reg | |
1459 | to | |
1460 | binop $foo, %reg | |
1461 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1462 | instructions. */ | |
1463 | ||
1464 | static bfd_boolean | |
1465 | elf_x86_64_convert_load_reloc (bfd *abfd, asection *sec, | |
1466 | bfd_byte *contents, | |
1467 | Elf_Internal_Rela *irel, | |
1468 | struct elf_link_hash_entry *h, | |
1469 | bfd_boolean *converted, | |
1470 | struct bfd_link_info *link_info) | |
1471 | { | |
0afcef53 | 1472 | struct elf_x86_link_hash_table *htab; |
c175a657 L |
1473 | bfd_boolean is_pic; |
1474 | bfd_boolean require_reloc_pc32; | |
1475 | bfd_boolean relocx; | |
1476 | bfd_boolean to_reloc_pc32; | |
1477 | asection *tsec; | |
1478 | char symtype; | |
1479 | bfd_signed_vma raddend; | |
1480 | unsigned int opcode; | |
1481 | unsigned int modrm; | |
1482 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
1483 | unsigned int r_symndx; | |
1484 | bfd_vma toff; | |
1485 | bfd_vma roff = irel->r_offset; | |
1486 | ||
1487 | if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2)) | |
1488 | return TRUE; | |
1489 | ||
1490 | raddend = irel->r_addend; | |
1491 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
1492 | if (raddend != -4) | |
1493 | return TRUE; | |
1494 | ||
0afcef53 | 1495 | htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA); |
c175a657 L |
1496 | is_pic = bfd_link_pic (link_info); |
1497 | ||
1498 | relocx = (r_type == R_X86_64_GOTPCRELX | |
1499 | || r_type == R_X86_64_REX_GOTPCRELX); | |
1500 | ||
1501 | /* TRUE if we can convert only to R_X86_64_PC32. Enable it for | |
1502 | --no-relax. */ | |
1503 | require_reloc_pc32 | |
1504 | = link_info->disable_target_specific_optimizations > 1; | |
1505 | ||
1506 | r_symndx = htab->r_sym (irel->r_info); | |
1507 | ||
1508 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1509 | ||
1510 | /* Convert mov to lea since it has been done for a while. */ | |
1511 | if (opcode != 0x8b) | |
1512 | { | |
1513 | /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX | |
1514 | for call, jmp or one of adc, add, and, cmp, or, sbb, sub, | |
1515 | test, xor instructions. */ | |
1516 | if (!relocx) | |
1517 | return TRUE; | |
1518 | } | |
1519 | ||
1520 | /* We convert only to R_X86_64_PC32: | |
1521 | 1. Branch. | |
1522 | 2. R_X86_64_GOTPCREL since we can't modify REX byte. | |
1523 | 3. require_reloc_pc32 is true. | |
1524 | 4. PIC. | |
1525 | */ | |
1526 | to_reloc_pc32 = (opcode == 0xff | |
1527 | || !relocx | |
1528 | || require_reloc_pc32 | |
1529 | || is_pic); | |
1530 | ||
1531 | /* Get the symbol referred to by the reloc. */ | |
1532 | if (h == NULL) | |
1533 | { | |
1534 | Elf_Internal_Sym *isym | |
1535 | = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx); | |
1536 | ||
1537 | /* Skip relocation against undefined symbols. */ | |
1538 | if (isym->st_shndx == SHN_UNDEF) | |
1539 | return TRUE; | |
1540 | ||
1541 | symtype = ELF_ST_TYPE (isym->st_info); | |
1542 | ||
1543 | if (isym->st_shndx == SHN_ABS) | |
1544 | tsec = bfd_abs_section_ptr; | |
1545 | else if (isym->st_shndx == SHN_COMMON) | |
1546 | tsec = bfd_com_section_ptr; | |
1547 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
1548 | tsec = &_bfd_elf_large_com_section; | |
1549 | else | |
1550 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1551 | ||
1552 | toff = isym->st_value; | |
1553 | } | |
1554 | else | |
1555 | { | |
1556 | /* Undefined weak symbol is only bound locally in executable | |
1557 | and its reference is resolved as 0 without relocation | |
1558 | overflow. We can only perform this optimization for | |
1559 | GOTPCRELX relocations since we need to modify REX byte. | |
1560 | It is OK convert mov with R_X86_64_GOTPCREL to | |
1561 | R_X86_64_PC32. */ | |
1562 | if ((relocx || opcode == 0x8b) | |
1563 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, | |
0afcef53 | 1564 | X86_64_ELF_DATA, |
c175a657 | 1565 | TRUE, |
0afcef53 | 1566 | elf_x86_hash_entry (h))) |
c175a657 L |
1567 | { |
1568 | if (opcode == 0xff) | |
1569 | { | |
1570 | /* Skip for branch instructions since R_X86_64_PC32 | |
1571 | may overflow. */ | |
1572 | if (require_reloc_pc32) | |
1573 | return TRUE; | |
1574 | } | |
1575 | else if (relocx) | |
1576 | { | |
1577 | /* For non-branch instructions, we can convert to | |
1578 | R_X86_64_32/R_X86_64_32S since we know if there | |
1579 | is a REX byte. */ | |
1580 | to_reloc_pc32 = FALSE; | |
1581 | } | |
1582 | ||
1583 | /* Since we don't know the current PC when PIC is true, | |
1584 | we can't convert to R_X86_64_PC32. */ | |
1585 | if (to_reloc_pc32 && is_pic) | |
1586 | return TRUE; | |
1587 | ||
1588 | goto convert; | |
1589 | } | |
1590 | /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since | |
1591 | ld.so may use its link-time address. */ | |
cbd0eecf L |
1592 | else if (h->start_stop |
1593 | || ((h->def_regular | |
1594 | || h->root.type == bfd_link_hash_defined | |
1595 | || h->root.type == bfd_link_hash_defweak) | |
1596 | && h != htab->elf.hdynamic | |
1597 | && SYMBOL_REFERENCES_LOCAL (link_info, h))) | |
c175a657 L |
1598 | { |
1599 | /* bfd_link_hash_new or bfd_link_hash_undefined is | |
1600 | set by an assignment in a linker script in | |
cbd0eecf L |
1601 | bfd_elf_record_link_assignment. start_stop is set |
1602 | on __start_SECNAME/__stop_SECNAME which mark section | |
1603 | SECNAME. */ | |
1604 | if (h->start_stop | |
1605 | || (h->def_regular | |
1606 | && (h->root.type == bfd_link_hash_new | |
1607 | || h->root.type == bfd_link_hash_undefined | |
1608 | || ((h->root.type == bfd_link_hash_defined | |
1609 | || h->root.type == bfd_link_hash_defweak) | |
1610 | && h->root.u.def.section == bfd_und_section_ptr)))) | |
c175a657 L |
1611 | { |
1612 | /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */ | |
1613 | if (require_reloc_pc32) | |
1614 | return TRUE; | |
1615 | goto convert; | |
1616 | } | |
1617 | tsec = h->root.u.def.section; | |
1618 | toff = h->root.u.def.value; | |
1619 | symtype = h->type; | |
1620 | } | |
1621 | else | |
1622 | return TRUE; | |
1623 | } | |
1624 | ||
2168b268 L |
1625 | /* Don't convert GOTPCREL relocation against large section. */ |
1626 | if (elf_section_data (tsec) != NULL | |
1627 | && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0) | |
1628 | return TRUE; | |
1629 | ||
c175a657 L |
1630 | /* We can only estimate relocation overflow for R_X86_64_PC32. */ |
1631 | if (!to_reloc_pc32) | |
1632 | goto convert; | |
1633 | ||
1634 | if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE) | |
1635 | { | |
1636 | /* At this stage in linking, no SEC_MERGE symbol has been | |
1637 | adjusted, so all references to such symbols need to be | |
1638 | passed through _bfd_merged_section_offset. (Later, in | |
1639 | relocate_section, all SEC_MERGE symbols *except* for | |
1640 | section symbols have been adjusted.) | |
1641 | ||
1642 | gas may reduce relocations against symbols in SEC_MERGE | |
1643 | sections to a relocation against the section symbol when | |
1644 | the original addend was zero. When the reloc is against | |
1645 | a section symbol we should include the addend in the | |
1646 | offset passed to _bfd_merged_section_offset, since the | |
1647 | location of interest is the original symbol. On the | |
1648 | other hand, an access to "sym+addend" where "sym" is not | |
1649 | a section symbol should not include the addend; Such an | |
1650 | access is presumed to be an offset from "sym"; The | |
1651 | location of interest is just "sym". */ | |
1652 | if (symtype == STT_SECTION) | |
1653 | toff += raddend; | |
1654 | ||
1655 | toff = _bfd_merged_section_offset (abfd, &tsec, | |
1656 | elf_section_data (tsec)->sec_info, | |
1657 | toff); | |
1658 | ||
1659 | if (symtype != STT_SECTION) | |
1660 | toff += raddend; | |
1661 | } | |
1662 | else | |
1663 | toff += raddend; | |
1664 | ||
1665 | /* Don't convert if R_X86_64_PC32 relocation overflows. */ | |
1666 | if (tsec->output_section == sec->output_section) | |
1667 | { | |
1668 | if ((toff - roff + 0x80000000) > 0xffffffff) | |
1669 | return TRUE; | |
1670 | } | |
1671 | else | |
1672 | { | |
1673 | bfd_signed_vma distance; | |
1674 | ||
1675 | /* At this point, we don't know the load addresses of TSEC | |
1676 | section nor SEC section. We estimate the distrance between | |
1677 | SEC and TSEC. We store the estimated distances in the | |
1678 | compressed_size field of the output section, which is only | |
1679 | used to decompress the compressed input section. */ | |
1680 | if (sec->output_section->compressed_size == 0) | |
1681 | { | |
1682 | asection *asect; | |
1683 | bfd_size_type size = 0; | |
1684 | for (asect = link_info->output_bfd->sections; | |
1685 | asect != NULL; | |
1686 | asect = asect->next) | |
1687 | /* Skip debug sections since compressed_size is used to | |
1688 | compress debug sections. */ | |
1689 | if ((asect->flags & SEC_DEBUGGING) == 0) | |
1690 | { | |
1691 | asection *i; | |
1692 | for (i = asect->map_head.s; | |
1693 | i != NULL; | |
1694 | i = i->map_head.s) | |
1695 | { | |
1696 | size = align_power (size, i->alignment_power); | |
1697 | size += i->size; | |
1698 | } | |
1699 | asect->compressed_size = size; | |
1700 | } | |
1701 | } | |
1702 | ||
1703 | /* Don't convert GOTPCREL relocations if TSEC isn't placed | |
1704 | after SEC. */ | |
1705 | distance = (tsec->output_section->compressed_size | |
1706 | - sec->output_section->compressed_size); | |
1707 | if (distance < 0) | |
1708 | return TRUE; | |
1709 | ||
1710 | /* Take PT_GNU_RELRO segment into account by adding | |
1711 | maxpagesize. */ | |
1712 | if ((toff + distance + get_elf_backend_data (abfd)->maxpagesize | |
1713 | - roff + 0x80000000) > 0xffffffff) | |
1714 | return TRUE; | |
1715 | } | |
1716 | ||
1717 | convert: | |
1718 | if (opcode == 0xff) | |
1719 | { | |
1720 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
1721 | unsigned int nop; | |
1722 | unsigned int disp; | |
1723 | bfd_vma nop_offset; | |
1724 | ||
1725 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
1726 | R_X86_64_PC32. */ | |
1727 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1728 | if (modrm == 0x25) | |
1729 | { | |
1730 | /* Convert to "jmp foo nop". */ | |
1731 | modrm = 0xe9; | |
1732 | nop = NOP_OPCODE; | |
1733 | nop_offset = irel->r_offset + 3; | |
1734 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1735 | irel->r_offset -= 1; | |
1736 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1737 | } | |
1738 | else | |
1739 | { | |
0afcef53 L |
1740 | struct elf_x86_link_hash_entry *eh |
1741 | = (struct elf_x86_link_hash_entry *) h; | |
e2cbcd91 | 1742 | |
c175a657 L |
1743 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
1744 | is a nop prefix. */ | |
1745 | modrm = 0xe8; | |
e2cbcd91 L |
1746 | /* To support TLS optimization, always use addr32 prefix for |
1747 | "call *__tls_get_addr@GOTPCREL(%rip)". */ | |
1d4af308 | 1748 | if (eh && eh->tls_get_addr) |
c175a657 | 1749 | { |
e2cbcd91 L |
1750 | nop = 0x67; |
1751 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1752 | } |
1753 | else | |
e2cbcd91 L |
1754 | { |
1755 | nop = link_info->call_nop_byte; | |
1756 | if (link_info->call_nop_as_suffix) | |
1757 | { | |
1758 | nop_offset = irel->r_offset + 3; | |
1759 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1760 | irel->r_offset -= 1; | |
1761 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1762 | } | |
1763 | else | |
1764 | nop_offset = irel->r_offset - 2; | |
1765 | } | |
c175a657 L |
1766 | } |
1767 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1768 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1769 | r_type = R_X86_64_PC32; | |
1770 | } | |
1771 | else | |
1772 | { | |
1773 | unsigned int rex; | |
1774 | unsigned int rex_mask = REX_R; | |
1775 | ||
1776 | if (r_type == R_X86_64_REX_GOTPCRELX) | |
1777 | rex = bfd_get_8 (abfd, contents + roff - 3); | |
1778 | else | |
1779 | rex = 0; | |
1780 | ||
1781 | if (opcode == 0x8b) | |
1782 | { | |
1783 | if (to_reloc_pc32) | |
1784 | { | |
1785 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1786 | "lea foo(%rip), %reg". */ | |
1787 | opcode = 0x8d; | |
1788 | r_type = R_X86_64_PC32; | |
1789 | } | |
1790 | else | |
1791 | { | |
1792 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1793 | "mov $foo, %reg". */ | |
1794 | opcode = 0xc7; | |
1795 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1796 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1797 | if ((rex & REX_W) != 0 | |
1798 | && ABI_64_P (link_info->output_bfd)) | |
1799 | { | |
1800 | /* Keep the REX_W bit in REX byte for LP64. */ | |
1801 | r_type = R_X86_64_32S; | |
1802 | goto rewrite_modrm_rex; | |
1803 | } | |
1804 | else | |
1805 | { | |
1806 | /* If the REX_W bit in REX byte isn't needed, | |
1807 | use R_X86_64_32 and clear the W bit to avoid | |
1808 | sign-extend imm32 to imm64. */ | |
1809 | r_type = R_X86_64_32; | |
1810 | /* Clear the W bit in REX byte. */ | |
1811 | rex_mask |= REX_W; | |
1812 | goto rewrite_modrm_rex; | |
1813 | } | |
1814 | } | |
1815 | } | |
1816 | else | |
1817 | { | |
1818 | /* R_X86_64_PC32 isn't supported. */ | |
1819 | if (to_reloc_pc32) | |
1820 | return TRUE; | |
1821 | ||
1822 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1823 | if (opcode == 0x85) | |
1824 | { | |
1825 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
1826 | "test $foo, %reg". */ | |
1827 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1828 | opcode = 0xf7; | |
1829 | } | |
1830 | else | |
1831 | { | |
1832 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
1833 | "binop $foo, %reg". */ | |
1834 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
1835 | opcode = 0x81; | |
1836 | } | |
1837 | ||
1838 | /* Use R_X86_64_32 with 32-bit operand to avoid relocation | |
1839 | overflow when sign-extending imm32 to imm64. */ | |
1840 | r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32; | |
1841 | ||
1842 | rewrite_modrm_rex: | |
1843 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1844 | ||
1845 | if (rex) | |
1846 | { | |
1847 | /* Move the R bit to the B bit in REX byte. */ | |
1848 | rex = (rex & ~rex_mask) | (rex & REX_R) >> 2; | |
1849 | bfd_put_8 (abfd, rex, contents + roff - 3); | |
1850 | } | |
1851 | ||
1852 | /* No addend for R_X86_64_32/R_X86_64_32S relocations. */ | |
1853 | irel->r_addend = 0; | |
1854 | } | |
1855 | ||
1856 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1857 | } | |
1858 | ||
1859 | irel->r_info = htab->r_info (r_symndx, r_type); | |
1860 | ||
1861 | *converted = TRUE; | |
1862 | ||
1863 | return TRUE; | |
1864 | } | |
1865 | ||
70256ad8 | 1866 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1867 | calculate needed space in the global offset table, procedure |
1868 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1869 | |
b34976b6 | 1870 | static bfd_boolean |
351f65ca L |
1871 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1872 | asection *sec, | |
1873 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1874 | { |
0afcef53 | 1875 | struct elf_x86_link_hash_table *htab; |
70256ad8 AJ |
1876 | Elf_Internal_Shdr *symtab_hdr; |
1877 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1878 | const Elf_Internal_Rela *rel; |
1879 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 1880 | asection *sreloc; |
bedfd056 | 1881 | bfd_byte *contents; |
70256ad8 | 1882 | |
0e1862bb | 1883 | if (bfd_link_relocatable (info)) |
b34976b6 | 1884 | return TRUE; |
70256ad8 | 1885 | |
081b1afe L |
1886 | /* Don't do anything special with non-loaded, non-alloced sections. |
1887 | In particular, any relocs in such sections should not affect GOT | |
1888 | and PLT reference counting (ie. we don't allow them to create GOT | |
1889 | or PLT entries), there's no possibility or desire to optimize TLS | |
1890 | relocs, and there's not much point in propagating relocs to shared | |
1891 | libs that the dynamic linker won't relocate. */ | |
1892 | if ((sec->flags & SEC_ALLOC) == 0) | |
1893 | return TRUE; | |
1894 | ||
0ffa91dd NC |
1895 | BFD_ASSERT (is_x86_64_elf (abfd)); |
1896 | ||
0afcef53 | 1897 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 | 1898 | if (htab == NULL) |
afd9acee L |
1899 | { |
1900 | sec->check_relocs_failed = 1; | |
1901 | return FALSE; | |
1902 | } | |
4dfe6ac6 | 1903 | |
bedfd056 L |
1904 | /* Get the section contents. */ |
1905 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1906 | contents = elf_section_data (sec)->this_hdr.contents; | |
1907 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1908 | { | |
1909 | sec->check_relocs_failed = 1; | |
1910 | return FALSE; | |
1911 | } | |
1912 | ||
0ffa91dd | 1913 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1914 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1915 | |
c434dee6 | 1916 | sreloc = NULL; |
cbe950e9 | 1917 | |
70256ad8 AJ |
1918 | rel_end = relocs + sec->reloc_count; |
1919 | for (rel = relocs; rel < rel_end; rel++) | |
1920 | { | |
bffbf940 | 1921 | unsigned int r_type; |
d42c267e | 1922 | unsigned int r_symndx; |
70256ad8 | 1923 | struct elf_link_hash_entry *h; |
0afcef53 | 1924 | struct elf_x86_link_hash_entry *eh; |
4c544807 L |
1925 | Elf_Internal_Sym *isym; |
1926 | const char *name; | |
06a6a421 | 1927 | bfd_boolean size_reloc; |
70256ad8 | 1928 | |
351f65ca L |
1929 | r_symndx = htab->r_sym (rel->r_info); |
1930 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1931 | |
1932 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1933 | { | |
695344c0 | 1934 | /* xgettext:c-format */ |
4eca0228 AM |
1935 | _bfd_error_handler (_("%B: bad symbol index: %d"), |
1936 | abfd, r_symndx); | |
afd9acee | 1937 | goto error_return; |
c434dee6 AJ |
1938 | } |
1939 | ||
70256ad8 | 1940 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1941 | { |
1942 | /* A local symbol. */ | |
c2e61a4e L |
1943 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1944 | abfd, r_symndx); | |
1945 | if (isym == NULL) | |
afd9acee | 1946 | goto error_return; |
c25bc9fc L |
1947 | |
1948 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1949 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1950 | { |
0afcef53 L |
1951 | h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, |
1952 | TRUE); | |
c25bc9fc | 1953 | if (h == NULL) |
afd9acee | 1954 | goto error_return; |
6bbec505 | 1955 | |
c25bc9fc | 1956 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
1957 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
1958 | isym, NULL); | |
c25bc9fc L |
1959 | h->type = STT_GNU_IFUNC; |
1960 | h->def_regular = 1; | |
1961 | h->ref_regular = 1; | |
1962 | h->forced_local = 1; | |
1963 | h->root.type = bfd_link_hash_defined; | |
1964 | } | |
1965 | else | |
1966 | h = NULL; | |
1967 | } | |
70256ad8 | 1968 | else |
71cb9464 | 1969 | { |
4c544807 | 1970 | isym = NULL; |
71cb9464 L |
1971 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1972 | while (h->root.type == bfd_link_hash_indirect | |
1973 | || h->root.type == bfd_link_hash_warning) | |
1974 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1975 | } |
cbe950e9 | 1976 | |
d1534d16 L |
1977 | /* Check invalid x32 relocations. */ |
1978 | if (!ABI_64_P (abfd)) | |
1979 | switch (r_type) | |
1980 | { | |
1981 | default: | |
1982 | break; | |
1983 | ||
d1534d16 L |
1984 | case R_X86_64_DTPOFF64: |
1985 | case R_X86_64_TPOFF64: | |
1986 | case R_X86_64_PC64: | |
1987 | case R_X86_64_GOTOFF64: | |
1988 | case R_X86_64_GOT64: | |
1989 | case R_X86_64_GOTPCREL64: | |
1990 | case R_X86_64_GOTPC64: | |
1991 | case R_X86_64_GOTPLT64: | |
1992 | case R_X86_64_PLTOFF64: | |
1993 | { | |
1994 | if (h) | |
1995 | name = h->root.root.string; | |
1996 | else | |
1997 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1998 | NULL); | |
4eca0228 | 1999 | _bfd_error_handler |
695344c0 | 2000 | /* xgettext:c-format */ |
d1534d16 L |
2001 | (_("%B: relocation %s against symbol `%s' isn't " |
2002 | "supported in x32 mode"), abfd, | |
2003 | x86_64_elf_howto_table[r_type].name, name); | |
2004 | bfd_set_error (bfd_error_bad_value); | |
afd9acee | 2005 | goto error_return; |
d1534d16 L |
2006 | } |
2007 | break; | |
2008 | } | |
2009 | ||
c25bc9fc L |
2010 | if (h != NULL) |
2011 | { | |
ad1e85de L |
2012 | /* It is referenced by a non-shared object. */ |
2013 | h->ref_regular = 1; | |
bc4e12de | 2014 | h->root.non_ir_ref_regular = 1; |
13a2df29 L |
2015 | |
2016 | if (h->type == STT_GNU_IFUNC) | |
2017 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
2018 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 2019 | } |
70256ad8 | 2020 | |
bedfd056 | 2021 | if (! elf_x86_64_tls_transition (info, abfd, sec, contents, |
351f65ca L |
2022 | symtab_hdr, sym_hashes, |
2023 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 2024 | rel, rel_end, h, r_symndx, FALSE)) |
afd9acee | 2025 | goto error_return; |
142411ca | 2026 | |
0afcef53 | 2027 | eh = (struct elf_x86_link_hash_entry *) h; |
bffbf940 | 2028 | switch (r_type) |
70256ad8 | 2029 | { |
bffbf940 | 2030 | case R_X86_64_TLSLD: |
0afcef53 | 2031 | htab->tls_ld_or_ldm_got.refcount += 1; |
bffbf940 JJ |
2032 | goto create_got; |
2033 | ||
2034 | case R_X86_64_TPOFF32: | |
0e1862bb | 2035 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
aab921ad | 2036 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2037 | &x86_64_elf_howto_table[r_type]); |
aec6b87e L |
2038 | if (eh != NULL) |
2039 | eh->has_got_reloc = 1; | |
bffbf940 | 2040 | break; |
c434dee6 | 2041 | |
bffbf940 | 2042 | case R_X86_64_GOTTPOFF: |
0e1862bb | 2043 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
2044 | info->flags |= DF_STATIC_TLS; |
2045 | /* Fall through */ | |
70256ad8 | 2046 | |
bffbf940 JJ |
2047 | case R_X86_64_GOT32: |
2048 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
2049 | case R_X86_64_GOTPCRELX: |
2050 | case R_X86_64_REX_GOTPCRELX: | |
bffbf940 | 2051 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
2052 | case R_X86_64_GOT64: |
2053 | case R_X86_64_GOTPCREL64: | |
2054 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
2055 | case R_X86_64_GOTPC32_TLSDESC: |
2056 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
2057 | /* This symbol requires a global offset table entry. */ |
2058 | { | |
2059 | int tls_type, old_tls_type; | |
2060 | ||
2061 | switch (r_type) | |
2062 | { | |
2063 | default: tls_type = GOT_NORMAL; break; | |
2064 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
2065 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
2066 | case R_X86_64_GOTPC32_TLSDESC: |
2067 | case R_X86_64_TLSDESC_CALL: | |
2068 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
2069 | } |
2070 | ||
2071 | if (h != NULL) | |
2072 | { | |
2073 | h->got.refcount += 1; | |
aec6b87e | 2074 | old_tls_type = eh->tls_type; |
bffbf940 JJ |
2075 | } |
2076 | else | |
2077 | { | |
2078 | bfd_signed_vma *local_got_refcounts; | |
2079 | ||
2080 | /* This is a global offset table entry for a local symbol. */ | |
2081 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2082 | if (local_got_refcounts == NULL) | |
2083 | { | |
2084 | bfd_size_type size; | |
2085 | ||
2086 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
2087 | size *= sizeof (bfd_signed_vma) |
2088 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
2089 | local_got_refcounts = ((bfd_signed_vma *) |
2090 | bfd_zalloc (abfd, size)); | |
2091 | if (local_got_refcounts == NULL) | |
afd9acee | 2092 | goto error_return; |
bffbf940 | 2093 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
0afcef53 | 2094 | elf_x86_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 2095 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
0afcef53 | 2096 | elf_x86_local_got_tls_type (abfd) |
67a4f2b7 | 2097 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
2098 | } |
2099 | local_got_refcounts[r_symndx] += 1; | |
2100 | old_tls_type | |
0afcef53 | 2101 | = elf_x86_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
2102 | } |
2103 | ||
2104 | /* If a TLS symbol is accessed using IE at least once, | |
2105 | there is no point to use dynamic model for it. */ | |
2106 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
2107 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
2108 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 2109 | { |
67a4f2b7 | 2110 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 2111 | tls_type = old_tls_type; |
67a4f2b7 AO |
2112 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2113 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2114 | tls_type |= old_tls_type; | |
bffbf940 JJ |
2115 | else |
2116 | { | |
09a24cbf | 2117 | if (h) |
4c544807 L |
2118 | name = h->root.root.string; |
2119 | else | |
2120 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
2121 | isym, NULL); | |
4eca0228 | 2122 | _bfd_error_handler |
695344c0 | 2123 | /* xgettext:c-format */ |
63a5468a AM |
2124 | (_("%B: '%s' accessed both as normal and" |
2125 | " thread local symbol"), | |
4c544807 | 2126 | abfd, name); |
68c4a57e | 2127 | bfd_set_error (bfd_error_bad_value); |
afd9acee | 2128 | goto error_return; |
bffbf940 JJ |
2129 | } |
2130 | } | |
2131 | ||
2132 | if (old_tls_type != tls_type) | |
2133 | { | |
aec6b87e L |
2134 | if (eh != NULL) |
2135 | eh->tls_type = tls_type; | |
bffbf940 | 2136 | else |
0afcef53 | 2137 | elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
2138 | } |
2139 | } | |
c434dee6 AJ |
2140 | /* Fall through */ |
2141 | ||
d6ab8113 JB |
2142 | case R_X86_64_GOTOFF64: |
2143 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2144 | case R_X86_64_GOTPC64: |
bffbf940 | 2145 | create_got: |
aec6b87e L |
2146 | if (eh != NULL) |
2147 | eh->has_got_reloc = 1; | |
70256ad8 AJ |
2148 | break; |
2149 | ||
2150 | case R_X86_64_PLT32: | |
c3320543 | 2151 | case R_X86_64_PLT32_BND: |
70256ad8 | 2152 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
2153 | actually build the entry in adjust_dynamic_symbol, |
2154 | because this might be a case of linking PIC code which is | |
2155 | never referenced by a dynamic object, in which case we | |
2156 | don't need to generate a procedure linkage table entry | |
2157 | after all. */ | |
70256ad8 AJ |
2158 | |
2159 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 2160 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
2161 | if (h == NULL) |
2162 | continue; | |
2163 | ||
aec6b87e | 2164 | eh->has_got_reloc = 1; |
f5385ebf | 2165 | h->needs_plt = 1; |
51b64d56 | 2166 | h->plt.refcount += 1; |
70256ad8 AJ |
2167 | break; |
2168 | ||
7b81dfbb AJ |
2169 | case R_X86_64_PLTOFF64: |
2170 | /* This tries to form the 'address' of a function relative | |
2171 | to GOT. For global symbols we need a PLT entry. */ | |
2172 | if (h != NULL) | |
2173 | { | |
2174 | h->needs_plt = 1; | |
2175 | h->plt.refcount += 1; | |
2176 | } | |
2177 | goto create_got; | |
2178 | ||
6a3e1bae L |
2179 | case R_X86_64_SIZE32: |
2180 | case R_X86_64_SIZE64: | |
06a6a421 | 2181 | size_reloc = TRUE; |
6a3e1bae L |
2182 | goto do_size; |
2183 | ||
248775ba L |
2184 | case R_X86_64_32: |
2185 | if (!ABI_64_P (abfd)) | |
2186 | goto pointer; | |
1a0670f3 | 2187 | /* Fall through. */ |
cc78d0af AJ |
2188 | case R_X86_64_8: |
2189 | case R_X86_64_16: | |
70256ad8 | 2190 | case R_X86_64_32S: |
338c190a L |
2191 | /* Check relocation overflow as these relocs may lead to |
2192 | run-time relocation overflow. Don't error out for | |
1b71fb54 | 2193 | sections we don't care about, such as debug sections or |
338c190a | 2194 | when relocation overflow check is disabled. */ |
4c10bbaa | 2195 | if (!info->no_reloc_overflow_check |
338c190a L |
2196 | && (bfd_link_pic (info) |
2197 | || (bfd_link_executable (info) | |
2198 | && h != NULL | |
2199 | && !h->def_regular | |
2200 | && h->def_dynamic | |
081b1afe | 2201 | && (sec->flags & SEC_READONLY) == 0))) |
aab921ad | 2202 | return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym, |
338c190a | 2203 | &x86_64_elf_howto_table[r_type]); |
1b71fb54 AJ |
2204 | /* Fall through. */ |
2205 | ||
c434dee6 AJ |
2206 | case R_X86_64_PC8: |
2207 | case R_X86_64_PC16: | |
70256ad8 | 2208 | case R_X86_64_PC32: |
c3320543 | 2209 | case R_X86_64_PC32_BND: |
d6ab8113 | 2210 | case R_X86_64_PC64: |
1b71fb54 | 2211 | case R_X86_64_64: |
248775ba | 2212 | pointer: |
aec6b87e L |
2213 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
2214 | eh->has_non_got_reloc = 1; | |
bf52d7c7 L |
2215 | /* We are called after all symbols have been resolved. Only |
2216 | relocation against STT_GNU_IFUNC symbol must go through | |
2217 | PLT. */ | |
d1ed1c7d L |
2218 | if (h != NULL |
2219 | && (bfd_link_executable (info) | |
bf52d7c7 | 2220 | || h->type == STT_GNU_IFUNC)) |
c434dee6 AJ |
2221 | { |
2222 | /* If this reloc is in a read-only section, we might | |
2223 | need a copy reloc. We can't check reliably at this | |
2224 | stage whether the section is read-only, as input | |
2225 | sections have not yet been mapped to output sections. | |
2226 | Tentatively set the flag for now, and correct in | |
2227 | adjust_dynamic_symbol. */ | |
f5385ebf | 2228 | h->non_got_ref = 1; |
c434dee6 | 2229 | |
233cc9c1 L |
2230 | /* We may need a .plt entry if the symbol is a function |
2231 | defined in a shared lib or is a STT_GNU_IFUNC function | |
2232 | referenced from the code or read-only section. */ | |
34bb2571 L |
2233 | if (!h->def_regular |
2234 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
233cc9c1 L |
2235 | h->plt.refcount += 1; |
2236 | ||
5db4f0d3 L |
2237 | if (r_type == R_X86_64_PC32) |
2238 | { | |
2239 | /* Since something like ".long foo - ." may be used | |
2240 | as pointer, make sure that PLT is used if foo is | |
2241 | a function defined in a shared library. */ | |
2242 | if ((sec->flags & SEC_CODE) == 0) | |
2243 | h->pointer_equality_needed = 1; | |
2244 | } | |
2245 | else if (r_type != R_X86_64_PC32_BND | |
2246 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
2247 | { |
2248 | h->pointer_equality_needed = 1; | |
2249 | /* At run-time, R_X86_64_64 can be resolved for both | |
2250 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
2251 | can only be resolved for x32. */ | |
2252 | if ((sec->flags & SEC_READONLY) == 0 | |
2253 | && (r_type == R_X86_64_64 | |
2254 | || (!ABI_64_P (abfd) | |
2255 | && (r_type == R_X86_64_32 | |
2256 | || r_type == R_X86_64_32S)))) | |
aec6b87e | 2257 | eh->func_pointer_refcount += 1; |
04ebc307 | 2258 | } |
c434dee6 | 2259 | } |
70256ad8 | 2260 | |
06a6a421 | 2261 | size_reloc = FALSE; |
6a3e1bae | 2262 | do_size: |
70256ad8 AJ |
2263 | /* If we are creating a shared library, and this is a reloc |
2264 | against a global symbol, or a non PC relative reloc | |
2265 | against a local symbol, then we need to copy the reloc | |
2266 | into the shared library. However, if we are linking with | |
2267 | -Bsymbolic, we do not need to copy a reloc against a | |
2268 | global symbol which is defined in an object we are | |
407443a3 | 2269 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
2270 | this point we have not seen all the input files, so it is |
2271 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
2272 | later (it is never cleared). In case of a weak definition, |
2273 | DEF_REGULAR may be cleared later by a strong definition in | |
2274 | a shared library. We account for that possibility below by | |
2275 | storing information in the relocs_copied field of the hash | |
2276 | table entry. A similar situation occurs when creating | |
2277 | shared libraries and symbol visibility changes render the | |
31c0ebfe | 2278 | symbol local. |
c434dee6 AJ |
2279 | |
2280 | If on the other hand, we are creating an executable, we | |
2281 | may need to keep relocations for symbols satisfied by a | |
2282 | dynamic library if we manage to avoid copy relocs for the | |
233cc9c1 L |
2283 | symbol. |
2284 | ||
2285 | Generate dynamic pointer relocation against STT_GNU_IFUNC | |
2286 | symbol in the non-code section. */ | |
081b1afe L |
2287 | if ((bfd_link_pic (info) |
2288 | && (! IS_X86_64_PCREL_TYPE (r_type) | |
2289 | || (h != NULL | |
2290 | && (! (bfd_link_pie (info) | |
2291 | || SYMBOLIC_BIND (info, h)) | |
2292 | || h->root.type == bfd_link_hash_defweak | |
2293 | || !h->def_regular)))) | |
233cc9c1 L |
2294 | || (h != NULL |
2295 | && h->type == STT_GNU_IFUNC | |
2296 | && r_type == htab->pointer_r_type | |
2297 | && (sec->flags & SEC_CODE) == 0) | |
081b1afe L |
2298 | || (ELIMINATE_COPY_RELOCS |
2299 | && !bfd_link_pic (info) | |
2300 | && h != NULL | |
2301 | && (h->root.type == bfd_link_hash_defweak | |
2302 | || !h->def_regular))) | |
70256ad8 | 2303 | { |
e03a8ed8 L |
2304 | struct elf_dyn_relocs *p; |
2305 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2306 | |
2307 | /* We must copy these reloc types into the output file. | |
2308 | Create a reloc section in dynobj and make room for | |
2309 | this reloc. */ | |
70256ad8 AJ |
2310 | if (sreloc == NULL) |
2311 | { | |
83bac4b0 | 2312 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
2313 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
2314 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 2315 | |
70256ad8 | 2316 | if (sreloc == NULL) |
afd9acee | 2317 | goto error_return; |
70256ad8 AJ |
2318 | } |
2319 | ||
c434dee6 AJ |
2320 | /* If this is a global symbol, we count the number of |
2321 | relocations we need for this symbol. */ | |
2322 | if (h != NULL) | |
aec6b87e | 2323 | head = &eh->dyn_relocs; |
c434dee6 AJ |
2324 | else |
2325 | { | |
2326 | /* Track dynamic relocs needed for local syms too. | |
2327 | We really need local syms available to do this | |
2328 | easily. Oh well. */ | |
c434dee6 | 2329 | asection *s; |
87d72d41 | 2330 | void **vpp; |
87d72d41 AM |
2331 | |
2332 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2333 | abfd, r_symndx); | |
2334 | if (isym == NULL) | |
afd9acee | 2335 | goto error_return; |
87d72d41 AM |
2336 | |
2337 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2338 | if (s == NULL) |
87d72d41 | 2339 | s = sec; |
70256ad8 | 2340 | |
e81d3500 DD |
2341 | /* Beware of type punned pointers vs strict aliasing |
2342 | rules. */ | |
2343 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2344 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2345 | } |
70256ad8 | 2346 | |
c434dee6 AJ |
2347 | p = *head; |
2348 | if (p == NULL || p->sec != sec) | |
2349 | { | |
2350 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 2351 | |
e03a8ed8 | 2352 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2353 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2354 | if (p == NULL) |
afd9acee | 2355 | goto error_return; |
c434dee6 AJ |
2356 | p->next = *head; |
2357 | *head = p; | |
2358 | p->sec = sec; | |
2359 | p->count = 0; | |
2360 | p->pc_count = 0; | |
70256ad8 | 2361 | } |
c434dee6 AJ |
2362 | |
2363 | p->count += 1; | |
06a6a421 L |
2364 | /* Count size relocation as PC-relative relocation. */ |
2365 | if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc) | |
c434dee6 | 2366 | p->pc_count += 1; |
70256ad8 AJ |
2367 | } |
2368 | break; | |
fe4770f4 AJ |
2369 | |
2370 | /* This relocation describes the C++ object vtable hierarchy. | |
2371 | Reconstruct it for later use during GC. */ | |
2372 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2373 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
afd9acee | 2374 | goto error_return; |
fe4770f4 AJ |
2375 | break; |
2376 | ||
2377 | /* This relocation describes which C++ vtable entries are actually | |
2378 | used. Record for later use during GC. */ | |
2379 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
2380 | BFD_ASSERT (h != NULL); |
2381 | if (h != NULL | |
2382 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
afd9acee | 2383 | goto error_return; |
fe4770f4 | 2384 | break; |
c434dee6 AJ |
2385 | |
2386 | default: | |
2387 | break; | |
70256ad8 | 2388 | } |
dd7e64d4 | 2389 | |
56ceb5b5 L |
2390 | if ((r_type == R_X86_64_GOTPCREL |
2391 | || r_type == R_X86_64_GOTPCRELX | |
2392 | || r_type == R_X86_64_REX_GOTPCRELX) | |
c1d11331 | 2393 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
56ceb5b5 | 2394 | sec->need_convert_load = 1; |
70256ad8 AJ |
2395 | } |
2396 | ||
bedfd056 L |
2397 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2398 | { | |
2399 | if (!info->keep_memory) | |
2400 | free (contents); | |
2401 | else | |
2402 | { | |
2403 | /* Cache the section contents for elf_link_input_bfd. */ | |
2404 | elf_section_data (sec)->this_hdr.contents = contents; | |
2405 | } | |
2406 | } | |
2407 | ||
b34976b6 | 2408 | return TRUE; |
afd9acee L |
2409 | |
2410 | error_return: | |
bedfd056 L |
2411 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2412 | free (contents); | |
afd9acee L |
2413 | sec->check_relocs_failed = 1; |
2414 | return FALSE; | |
70256ad8 AJ |
2415 | } |
2416 | ||
2417 | /* Return the section that should be marked against GC for a given | |
407443a3 | 2418 | relocation. */ |
70256ad8 AJ |
2419 | |
2420 | static asection * | |
351f65ca L |
2421 | elf_x86_64_gc_mark_hook (asection *sec, |
2422 | struct bfd_link_info *info, | |
2423 | Elf_Internal_Rela *rel, | |
2424 | struct elf_link_hash_entry *h, | |
2425 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
2426 | { |
2427 | if (h != NULL) | |
351f65ca | 2428 | switch (ELF32_R_TYPE (rel->r_info)) |
07adf181 AM |
2429 | { |
2430 | case R_X86_64_GNU_VTINHERIT: | |
2431 | case R_X86_64_GNU_VTENTRY: | |
2432 | return NULL; | |
2433 | } | |
2434 | ||
2435 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
2436 | } |
2437 | ||
70256ad8 AJ |
2438 | /* Adjust a symbol defined by a dynamic object and referenced by a |
2439 | regular object. The current definition is in some section of the | |
2440 | dynamic object, but we're not including those sections. We have to | |
2441 | change the definition to something the rest of the link can | |
407443a3 | 2442 | understand. */ |
70256ad8 | 2443 | |
b34976b6 | 2444 | static bfd_boolean |
351f65ca L |
2445 | elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
2446 | struct elf_link_hash_entry *h) | |
70256ad8 | 2447 | { |
0afcef53 | 2448 | struct elf_x86_link_hash_table *htab; |
5474d94f | 2449 | asection *s, *srel; |
0afcef53 | 2450 | struct elf_x86_link_hash_entry *eh; |
5ca5bb35 | 2451 | struct elf_dyn_relocs *p; |
70256ad8 | 2452 | |
cbe950e9 L |
2453 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2454 | if (h->type == STT_GNU_IFUNC) | |
2455 | { | |
73bcf233 L |
2456 | /* All local STT_GNU_IFUNC references must be treate as local |
2457 | calls via local PLT. */ | |
5ca5bb35 L |
2458 | if (h->ref_regular |
2459 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2460 | { | |
73bcf233 | 2461 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2462 | struct elf_dyn_relocs **pp; |
2463 | ||
0afcef53 | 2464 | eh = (struct elf_x86_link_hash_entry *) h; |
5ca5bb35 L |
2465 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
2466 | { | |
2467 | pc_count += p->pc_count; | |
2468 | p->count -= p->pc_count; | |
2469 | p->pc_count = 0; | |
73bcf233 | 2470 | count += p->count; |
5ca5bb35 L |
2471 | if (p->count == 0) |
2472 | *pp = p->next; | |
2473 | else | |
2474 | pp = &p->next; | |
2475 | } | |
2476 | ||
73bcf233 | 2477 | if (pc_count || count) |
5ca5bb35 | 2478 | { |
5ca5bb35 | 2479 | h->non_got_ref = 1; |
233cc9c1 L |
2480 | if (pc_count) |
2481 | { | |
2482 | /* Increment PLT reference count only for PC-relative | |
2483 | references. */ | |
2484 | h->needs_plt = 1; | |
2485 | if (h->plt.refcount <= 0) | |
2486 | h->plt.refcount = 1; | |
2487 | else | |
2488 | h->plt.refcount += 1; | |
2489 | } | |
5ca5bb35 L |
2490 | } |
2491 | } | |
2492 | ||
cbe950e9 L |
2493 | if (h->plt.refcount <= 0) |
2494 | { | |
2495 | h->plt.offset = (bfd_vma) -1; | |
2496 | h->needs_plt = 0; | |
2497 | } | |
2498 | return TRUE; | |
2499 | } | |
2500 | ||
70256ad8 AJ |
2501 | /* If this is a function, put it in the procedure linkage table. We |
2502 | will fill in the contents of the procedure linkage table later, | |
2503 | when we know the address of the .got section. */ | |
2504 | if (h->type == STT_FUNC | |
f5385ebf | 2505 | || h->needs_plt) |
70256ad8 | 2506 | { |
c434dee6 | 2507 | if (h->plt.refcount <= 0 |
27482721 AJ |
2508 | || SYMBOL_CALLS_LOCAL (info, h) |
2509 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2510 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 2511 | { |
70256ad8 AJ |
2512 | /* This case can occur if we saw a PLT32 reloc in an input |
2513 | file, but the symbol was never referred to by a dynamic | |
2514 | object, or if all references were garbage collected. In | |
2515 | such a case, we don't actually need to build a procedure | |
2516 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 2517 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2518 | h->needs_plt = 0; |
70256ad8 AJ |
2519 | } |
2520 | ||
b34976b6 | 2521 | return TRUE; |
70256ad8 | 2522 | } |
bbd7ec4a | 2523 | else |
c434dee6 AJ |
2524 | /* It's possible that we incorrectly decided a .plt reloc was |
2525 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
2526 | check_relocs. We can't decide accurately between function and | |
2527 | non-function syms in check-relocs; Objects loaded later in | |
2528 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2529 | h->plt.offset = (bfd_vma) -1; |
70256ad8 | 2530 | |
0afcef53 | 2531 | eh = (struct elf_x86_link_hash_entry *) h; |
a5b4ee94 | 2532 | |
70256ad8 AJ |
2533 | /* If this is a weak symbol, and there is a real definition, the |
2534 | processor independent code will have arranged for us to see the | |
407443a3 | 2535 | real definition first, and we can just use the same value. */ |
f6e332e6 | 2536 | if (h->u.weakdef != NULL) |
70256ad8 | 2537 | { |
f6e332e6 AM |
2538 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2539 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2540 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2541 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
a5b4ee94 L |
2542 | if (ELIMINATE_COPY_RELOCS |
2543 | || info->nocopyreloc | |
2544 | || SYMBOL_NO_COPYRELOC (info, eh)) | |
bc696fd5 | 2545 | { |
bc696fd5 L |
2546 | h->non_got_ref = h->u.weakdef->non_got_ref; |
2547 | eh->needs_copy = h->u.weakdef->needs_copy; | |
2548 | } | |
b34976b6 | 2549 | return TRUE; |
70256ad8 AJ |
2550 | } |
2551 | ||
2552 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 2553 | is not a function. */ |
70256ad8 AJ |
2554 | |
2555 | /* If we are creating a shared library, we must presume that the | |
2556 | only references to the symbol are via the global offset table. | |
2557 | For such cases we need not do anything here; the relocations will | |
407443a3 | 2558 | be handled correctly by relocate_section. */ |
0e1862bb | 2559 | if (!bfd_link_executable (info)) |
b34976b6 | 2560 | return TRUE; |
70256ad8 AJ |
2561 | |
2562 | /* If there are no references to this symbol that do not use the | |
2563 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 2564 | if (!h->non_got_ref) |
b34976b6 | 2565 | return TRUE; |
70256ad8 | 2566 | |
c434dee6 | 2567 | /* If -z nocopyreloc was given, we won't generate them either. */ |
a5b4ee94 | 2568 | if (info->nocopyreloc || SYMBOL_NO_COPYRELOC (info, eh)) |
c434dee6 | 2569 | { |
f5385ebf | 2570 | h->non_got_ref = 0; |
b34976b6 | 2571 | return TRUE; |
c434dee6 AJ |
2572 | } |
2573 | ||
31c0ebfe | 2574 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 2575 | { |
0afcef53 | 2576 | eh = (struct elf_x86_link_hash_entry *) h; |
d40d037c AJ |
2577 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2578 | { | |
2579 | s = p->sec->output_section; | |
2580 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2581 | break; | |
2582 | } | |
2583 | ||
2584 | /* If we didn't find any dynamic relocs in read-only sections, then | |
2585 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
2586 | if (p == NULL) | |
2587 | { | |
f5385ebf | 2588 | h->non_got_ref = 0; |
d40d037c AJ |
2589 | return TRUE; |
2590 | } | |
c434dee6 AJ |
2591 | } |
2592 | ||
70256ad8 | 2593 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 2594 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
2595 | an entry for this symbol in the .dynsym section. The dynamic |
2596 | object will contain position independent code, so all references | |
2597 | from the dynamic object to this symbol will go through the global | |
2598 | offset table. The dynamic linker will use the .dynsym entry to | |
2599 | determine the address it must put in the global offset table, so | |
2600 | both the dynamic object and the regular object will refer to the | |
2601 | same memory location for the variable. */ | |
2602 | ||
0afcef53 | 2603 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
2604 | if (htab == NULL) |
2605 | return FALSE; | |
70256ad8 AJ |
2606 | |
2607 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
2608 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 2609 | runtime process image. */ |
5474d94f AM |
2610 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
2611 | { | |
2612 | s = htab->elf.sdynrelro; | |
2613 | srel = htab->elf.sreldynrelro; | |
2614 | } | |
2615 | else | |
2616 | { | |
2617 | s = htab->elf.sdynbss; | |
2618 | srel = htab->elf.srelbss; | |
2619 | } | |
1d7e9d18 | 2620 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
70256ad8 | 2621 | { |
351f65ca L |
2622 | const struct elf_backend_data *bed; |
2623 | bed = get_elf_backend_data (info->output_bfd); | |
5474d94f | 2624 | srel->size += bed->s->sizeof_rela; |
f5385ebf | 2625 | h->needs_copy = 1; |
70256ad8 AJ |
2626 | } |
2627 | ||
6cabe1ea | 2628 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
70256ad8 AJ |
2629 | } |
2630 | ||
c434dee6 AJ |
2631 | /* Allocate space in .plt, .got and associated reloc sections for |
2632 | dynamic relocs. */ | |
2633 | ||
b34976b6 | 2634 | static bfd_boolean |
351f65ca | 2635 | elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
2636 | { |
2637 | struct bfd_link_info *info; | |
0afcef53 L |
2638 | struct elf_x86_link_hash_table *htab; |
2639 | struct elf_x86_link_hash_entry *eh; | |
e03a8ed8 | 2640 | struct elf_dyn_relocs *p; |
351f65ca | 2641 | const struct elf_backend_data *bed; |
eed180f8 | 2642 | unsigned int plt_entry_size; |
aec6b87e | 2643 | bfd_boolean resolved_to_zero; |
c434dee6 | 2644 | |
e92d460e | 2645 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2646 | return TRUE; |
c434dee6 | 2647 | |
0afcef53 | 2648 | eh = (struct elf_x86_link_hash_entry *) h; |
e92d460e | 2649 | |
c434dee6 | 2650 | info = (struct bfd_link_info *) inf; |
0afcef53 | 2651 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
2652 | if (htab == NULL) |
2653 | return FALSE; | |
351f65ca | 2654 | bed = get_elf_backend_data (info->output_bfd); |
0afcef53 | 2655 | |
765e526c | 2656 | plt_entry_size = htab->plt.plt_entry_size; |
c434dee6 | 2657 | |
e62b9723 | 2658 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
0afcef53 | 2659 | X86_64_ELF_DATA, |
e62b9723 L |
2660 | eh->has_got_reloc, |
2661 | eh); | |
aec6b87e | 2662 | |
dd7e64d4 L |
2663 | /* We can't use the GOT PLT if pointer equality is needed since |
2664 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
2665 | linker won't update the GOT slot. We will get into an infinite | |
2666 | loop at run-time. */ | |
2667 | if (htab->plt_got != NULL | |
2668 | && h->type != STT_GNU_IFUNC | |
2669 | && !h->pointer_equality_needed | |
2670 | && h->plt.refcount > 0 | |
2671 | && h->got.refcount > 0) | |
2672 | { | |
2673 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
2674 | reloctions. */ | |
2675 | h->plt.offset = (bfd_vma) -1; | |
2676 | ||
2677 | /* Use the GOT PLT. */ | |
2678 | eh->plt_got.refcount = 1; | |
2679 | } | |
2680 | ||
04ebc307 L |
2681 | /* Clear the reference count of function pointer relocations if |
2682 | symbol isn't a normal function. */ | |
2683 | if (h->type != STT_FUNC) | |
2684 | eh->func_pointer_refcount = 0; | |
2685 | ||
cbe950e9 L |
2686 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2687 | here if it is defined and referenced in a non-shared object. */ | |
2688 | if (h->type == STT_GNU_IFUNC | |
2689 | && h->def_regular) | |
0ff2b86e L |
2690 | { |
2691 | if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, | |
2692 | &eh->dyn_relocs, | |
2df3368d | 2693 | &htab->readonly_dynrelocs_against_ifunc, |
0ff2b86e | 2694 | plt_entry_size, |
765e526c | 2695 | (htab->plt.has_plt0 |
38b12349 | 2696 | * plt_entry_size), |
233cc9c1 | 2697 | GOT_ENTRY_SIZE, TRUE)) |
0ff2b86e | 2698 | { |
f2c29a16 | 2699 | asection *s = htab->plt_second; |
0ff2b86e L |
2700 | if (h->plt.offset != (bfd_vma) -1 && s != NULL) |
2701 | { | |
f2c29a16 L |
2702 | /* Use the second PLT section if it is created. */ |
2703 | eh->plt_second.offset = s->size; | |
0ff2b86e | 2704 | |
f2c29a16 | 2705 | /* Make room for this entry in the second PLT section. */ |
765e526c | 2706 | s->size += htab->non_lazy_plt->plt_entry_size; |
0ff2b86e L |
2707 | } |
2708 | ||
2709 | return TRUE; | |
2710 | } | |
2711 | else | |
2712 | return FALSE; | |
2713 | } | |
04ebc307 L |
2714 | /* Don't create the PLT entry if there are only function pointer |
2715 | relocations which can be resolved at run-time. */ | |
cbe950e9 | 2716 | else if (htab->elf.dynamic_sections_created |
04ebc307 L |
2717 | && (h->plt.refcount > eh->func_pointer_refcount |
2718 | || eh->plt_got.refcount > 0)) | |
c434dee6 | 2719 | { |
dc2be3d2 | 2720 | bfd_boolean use_plt_got = eh->plt_got.refcount > 0; |
25070364 | 2721 | |
04ebc307 L |
2722 | /* Clear the reference count of function pointer relocations |
2723 | if PLT is used. */ | |
2724 | eh->func_pointer_refcount = 0; | |
2725 | ||
c434dee6 AJ |
2726 | /* Make sure this symbol is output as a dynamic symbol. |
2727 | Undefined weak syms won't yet be marked as dynamic. */ | |
2728 | if (h->dynindx == -1 | |
aec6b87e | 2729 | && !h->forced_local |
9e9821dd L |
2730 | && !resolved_to_zero |
2731 | && h->root.type == bfd_link_hash_undefweak) | |
c434dee6 | 2732 | { |
c152c796 | 2733 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2734 | return FALSE; |
c434dee6 AJ |
2735 | } |
2736 | ||
0e1862bb | 2737 | if (bfd_link_pic (info) |
27482721 | 2738 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
c434dee6 | 2739 | { |
6de2ae4a | 2740 | asection *s = htab->elf.splt; |
f2c29a16 | 2741 | asection *second_s = htab->plt_second; |
dd7e64d4 | 2742 | asection *got_s = htab->plt_got; |
c434dee6 | 2743 | |
7c1e8d3e L |
2744 | /* If this is the first .plt entry, make room for the special |
2745 | first entry. The .plt section is used by prelink to undo | |
2746 | prelinking for dynamic relocations. */ | |
2747 | if (s->size == 0) | |
765e526c | 2748 | s->size = htab->plt.has_plt0 * plt_entry_size; |
7c1e8d3e | 2749 | |
dd7e64d4 L |
2750 | if (use_plt_got) |
2751 | eh->plt_got.offset = got_s->size; | |
2752 | else | |
2753 | { | |
2754 | h->plt.offset = s->size; | |
f2c29a16 L |
2755 | if (second_s) |
2756 | eh->plt_second.offset = second_s->size; | |
dd7e64d4 | 2757 | } |
c434dee6 AJ |
2758 | |
2759 | /* If this symbol is not defined in a regular file, and we are | |
2760 | not generating a shared library, then set the symbol to this | |
2761 | location in the .plt. This is required to make function | |
2762 | pointers compare as equal between the normal executable and | |
2763 | the shared library. */ | |
0e1862bb | 2764 | if (! bfd_link_pic (info) |
f5385ebf | 2765 | && !h->def_regular) |
c434dee6 | 2766 | { |
dd7e64d4 | 2767 | if (use_plt_got) |
0ff2b86e | 2768 | { |
dd7e64d4 L |
2769 | /* We need to make a call to the entry of the GOT PLT |
2770 | instead of regular PLT entry. */ | |
2771 | h->root.u.def.section = got_s; | |
2772 | h->root.u.def.value = eh->plt_got.offset; | |
0ff2b86e L |
2773 | } |
2774 | else | |
2775 | { | |
f2c29a16 | 2776 | if (second_s) |
dd7e64d4 | 2777 | { |
f2c29a16 L |
2778 | /* We need to make a call to the entry of the |
2779 | second PLT instead of regular PLT entry. */ | |
2780 | h->root.u.def.section = second_s; | |
2781 | h->root.u.def.value = eh->plt_second.offset; | |
dd7e64d4 L |
2782 | } |
2783 | else | |
2784 | { | |
2785 | h->root.u.def.section = s; | |
2786 | h->root.u.def.value = h->plt.offset; | |
2787 | } | |
0ff2b86e | 2788 | } |
c434dee6 AJ |
2789 | } |
2790 | ||
2791 | /* Make room for this entry. */ | |
dd7e64d4 | 2792 | if (use_plt_got) |
765e526c | 2793 | got_s->size += htab->non_lazy_plt->plt_entry_size; |
dd7e64d4 L |
2794 | else |
2795 | { | |
2796 | s->size += plt_entry_size; | |
f2c29a16 | 2797 | if (second_s) |
765e526c | 2798 | second_s->size += htab->non_lazy_plt->plt_entry_size; |
c434dee6 | 2799 | |
dd7e64d4 L |
2800 | /* We also need to make an entry in the .got.plt section, |
2801 | which will be placed in the .got section by the linker | |
2802 | script. */ | |
2803 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; | |
c434dee6 | 2804 | |
aec6b87e L |
2805 | /* There should be no PLT relocation against resolved |
2806 | undefined weak symbol in executable. */ | |
2807 | if (!resolved_to_zero) | |
2808 | { | |
2809 | /* We also need to make an entry in the .rela.plt | |
2810 | section. */ | |
2811 | htab->elf.srelplt->size += bed->s->sizeof_rela; | |
2812 | htab->elf.srelplt->reloc_count++; | |
2813 | } | |
dd7e64d4 | 2814 | } |
c434dee6 AJ |
2815 | } |
2816 | else | |
2817 | { | |
13f42277 | 2818 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 2819 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2820 | h->needs_plt = 0; |
c434dee6 AJ |
2821 | } |
2822 | } | |
2823 | else | |
2824 | { | |
13f42277 | 2825 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 2826 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2827 | h->needs_plt = 0; |
c434dee6 AJ |
2828 | } |
2829 | ||
67a4f2b7 AO |
2830 | eh->tlsdesc_got = (bfd_vma) -1; |
2831 | ||
bffbf940 JJ |
2832 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
2833 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
2834 | if (h->got.refcount > 0 | |
0e1862bb | 2835 | && bfd_link_executable (info) |
bffbf940 | 2836 | && h->dynindx == -1 |
0afcef53 | 2837 | && elf_x86_hash_entry (h)->tls_type == GOT_TLS_IE) |
d8045f23 NC |
2838 | { |
2839 | h->got.offset = (bfd_vma) -1; | |
2840 | } | |
bffbf940 | 2841 | else if (h->got.refcount > 0) |
c434dee6 AJ |
2842 | { |
2843 | asection *s; | |
b34976b6 | 2844 | bfd_boolean dyn; |
0afcef53 | 2845 | int tls_type = elf_x86_hash_entry (h)->tls_type; |
c434dee6 AJ |
2846 | |
2847 | /* Make sure this symbol is output as a dynamic symbol. | |
2848 | Undefined weak syms won't yet be marked as dynamic. */ | |
2849 | if (h->dynindx == -1 | |
aec6b87e | 2850 | && !h->forced_local |
9e9821dd L |
2851 | && !resolved_to_zero |
2852 | && h->root.type == bfd_link_hash_undefweak) | |
c434dee6 | 2853 | { |
c152c796 | 2854 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2855 | return FALSE; |
c434dee6 AJ |
2856 | } |
2857 | ||
67a4f2b7 AO |
2858 | if (GOT_TLS_GDESC_P (tls_type)) |
2859 | { | |
6de2ae4a | 2860 | eh->tlsdesc_got = htab->elf.sgotplt->size |
351f65ca | 2861 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2862 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2863 | h->got.offset = (bfd_vma) -2; |
2864 | } | |
2865 | if (! GOT_TLS_GDESC_P (tls_type) | |
2866 | || GOT_TLS_GD_P (tls_type)) | |
2867 | { | |
6de2ae4a | 2868 | s = htab->elf.sgot; |
67a4f2b7 AO |
2869 | h->got.offset = s->size; |
2870 | s->size += GOT_ENTRY_SIZE; | |
2871 | if (GOT_TLS_GD_P (tls_type)) | |
2872 | s->size += GOT_ENTRY_SIZE; | |
2873 | } | |
c434dee6 | 2874 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 | 2875 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
aec6b87e L |
2876 | and two if global. R_X86_64_GOTTPOFF needs one dynamic |
2877 | relocation. No dynamic relocation against resolved undefined | |
2878 | weak symbol in executable. */ | |
67a4f2b7 | 2879 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 2880 | || tls_type == GOT_TLS_IE) |
351f65ca | 2881 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 | 2882 | else if (GOT_TLS_GD_P (tls_type)) |
351f65ca | 2883 | htab->elf.srelgot->size += 2 * bed->s->sizeof_rela; |
67a4f2b7 | 2884 | else if (! GOT_TLS_GDESC_P (tls_type) |
aec6b87e L |
2885 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
2886 | && !resolved_to_zero) | |
67a4f2b7 | 2887 | || h->root.type != bfd_link_hash_undefweak) |
0e1862bb | 2888 | && (bfd_link_pic (info) |
27482721 | 2889 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
351f65ca | 2890 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2891 | if (GOT_TLS_GDESC_P (tls_type)) |
2892 | { | |
351f65ca | 2893 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2894 | htab->tlsdesc_plt = (bfd_vma) -1; |
2895 | } | |
c434dee6 AJ |
2896 | } |
2897 | else | |
2898 | h->got.offset = (bfd_vma) -1; | |
2899 | ||
c434dee6 | 2900 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2901 | return TRUE; |
c434dee6 AJ |
2902 | |
2903 | /* In the shared -Bsymbolic case, discard space allocated for | |
2904 | dynamic pc-relative relocs against symbols which turn out to be | |
2905 | defined in regular objects. For the normal shared case, discard | |
2906 | space for pc-relative relocs that have become local due to symbol | |
2907 | visibility changes. */ | |
2908 | ||
0e1862bb | 2909 | if (bfd_link_pic (info)) |
c434dee6 | 2910 | { |
27482721 AJ |
2911 | /* Relocs that use pc_count are those that appear on a call |
2912 | insn, or certain REL relocs that can generated via assembly. | |
2913 | We want calls to protected symbols to resolve directly to the | |
2914 | function rather than going via the plt. If people want | |
2915 | function pointer comparisons to work as expected then they | |
2916 | should avoid writing weird assembly. */ | |
2917 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 2918 | { |
e03a8ed8 | 2919 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
2920 | |
2921 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2922 | { | |
c3ce498c L |
2923 | p->count -= p->pc_count; |
2924 | p->pc_count = 0; | |
c434dee6 AJ |
2925 | if (p->count == 0) |
2926 | *pp = p->next; | |
2927 | else | |
2928 | pp = &p->next; | |
2929 | } | |
2930 | } | |
4e795f50 AM |
2931 | |
2932 | /* Also discard relocs on undefined weak syms with non-default | |
aec6b87e | 2933 | visibility or in PIE. */ |
31c0ebfe | 2934 | if (eh->dyn_relocs != NULL) |
22d606e9 | 2935 | { |
31c0ebfe L |
2936 | if (h->root.type == bfd_link_hash_undefweak) |
2937 | { | |
aec6b87e L |
2938 | /* Undefined weak symbol is never bound locally in shared |
2939 | library. */ | |
2940 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2941 | || resolved_to_zero) | |
31c0ebfe | 2942 | eh->dyn_relocs = NULL; |
31c0ebfe L |
2943 | else if (h->dynindx == -1 |
2944 | && ! h->forced_local | |
2945 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2946 | return FALSE; | |
2947 | } | |
9d1d54d5 L |
2948 | /* For PIE, discard space for pc-relative relocs against |
2949 | symbols which turn out to need copy relocs. */ | |
0e1862bb | 2950 | else if (bfd_link_executable (info) |
bc696fd5 | 2951 | && (h->needs_copy || eh->needs_copy) |
31c0ebfe L |
2952 | && h->def_dynamic |
2953 | && !h->def_regular) | |
9d1d54d5 L |
2954 | { |
2955 | struct elf_dyn_relocs **pp; | |
2956 | ||
2957 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2958 | { | |
2959 | if (p->pc_count != 0) | |
2960 | *pp = p->next; | |
2961 | else | |
2962 | pp = &p->next; | |
2963 | } | |
2964 | } | |
22d606e9 | 2965 | } |
d8045f23 | 2966 | } |
d40d037c | 2967 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
2968 | { |
2969 | /* For the non-shared case, discard space for relocs against | |
2970 | symbols which turn out to need copy relocs or are not | |
04ebc307 L |
2971 | dynamic. Keep dynamic relocations for run-time function |
2972 | pointer initialization. */ | |
c434dee6 | 2973 | |
aec6b87e L |
2974 | if ((!h->non_got_ref |
2975 | || eh->func_pointer_refcount > 0 | |
2976 | || (h->root.type == bfd_link_hash_undefweak | |
2977 | && !resolved_to_zero)) | |
f5385ebf AM |
2978 | && ((h->def_dynamic |
2979 | && !h->def_regular) | |
c434dee6 AJ |
2980 | || (htab->elf.dynamic_sections_created |
2981 | && (h->root.type == bfd_link_hash_undefweak | |
2982 | || h->root.type == bfd_link_hash_undefined)))) | |
2983 | { | |
2984 | /* Make sure this symbol is output as a dynamic symbol. | |
2985 | Undefined weak syms won't yet be marked as dynamic. */ | |
2986 | if (h->dynindx == -1 | |
d8045f23 | 2987 | && ! h->forced_local |
aec6b87e | 2988 | && ! resolved_to_zero |
9e9821dd | 2989 | && h->root.type == bfd_link_hash_undefweak |
d8045f23 NC |
2990 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
2991 | return FALSE; | |
c434dee6 AJ |
2992 | |
2993 | /* If that succeeded, we know we'll be keeping all the | |
2994 | relocs. */ | |
2995 | if (h->dynindx != -1) | |
2996 | goto keep; | |
2997 | } | |
2998 | ||
2999 | eh->dyn_relocs = NULL; | |
04ebc307 | 3000 | eh->func_pointer_refcount = 0; |
c434dee6 AJ |
3001 | |
3002 | keep: ; | |
3003 | } | |
3004 | ||
3005 | /* Finally, allocate space. */ | |
3006 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
3007 | { | |
e7c33416 NC |
3008 | asection * sreloc; |
3009 | ||
cbe950e9 | 3010 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
3011 | |
3012 | BFD_ASSERT (sreloc != NULL); | |
3013 | ||
351f65ca | 3014 | sreloc->size += p->count * bed->s->sizeof_rela; |
c434dee6 AJ |
3015 | } |
3016 | ||
b34976b6 | 3017 | return TRUE; |
c434dee6 AJ |
3018 | } |
3019 | ||
c25bc9fc L |
3020 | /* Allocate space in .plt, .got and associated reloc sections for |
3021 | local dynamic relocs. */ | |
3022 | ||
3023 | static bfd_boolean | |
351f65ca | 3024 | elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf) |
c25bc9fc L |
3025 | { |
3026 | struct elf_link_hash_entry *h | |
3027 | = (struct elf_link_hash_entry *) *slot; | |
3028 | ||
3029 | if (h->type != STT_GNU_IFUNC | |
3030 | || !h->def_regular | |
3031 | || !h->ref_regular | |
3032 | || !h->forced_local | |
3033 | || h->root.type != bfd_link_hash_defined) | |
3034 | abort (); | |
3035 | ||
351f65ca | 3036 | return elf_x86_64_allocate_dynrelocs (h, inf); |
c25bc9fc L |
3037 | } |
3038 | ||
c175a657 | 3039 | /* Convert load via the GOT slot to load immediate. */ |
daa67607 L |
3040 | |
3041 | static bfd_boolean | |
56ceb5b5 L |
3042 | elf_x86_64_convert_load (bfd *abfd, asection *sec, |
3043 | struct bfd_link_info *link_info) | |
daa67607 L |
3044 | { |
3045 | Elf_Internal_Shdr *symtab_hdr; | |
3046 | Elf_Internal_Rela *internal_relocs; | |
3047 | Elf_Internal_Rela *irel, *irelend; | |
3048 | bfd_byte *contents; | |
0afcef53 | 3049 | struct elf_x86_link_hash_table *htab; |
c175a657 | 3050 | bfd_boolean changed; |
daa67607 L |
3051 | bfd_signed_vma *local_got_refcounts; |
3052 | ||
3053 | /* Don't even try to convert non-ELF outputs. */ | |
3054 | if (!is_elf_hash_table (link_info->hash)) | |
3055 | return FALSE; | |
3056 | ||
c1d11331 | 3057 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 3058 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
56ceb5b5 | 3059 | || sec->need_convert_load == 0 |
c8831961 | 3060 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
3061 | return TRUE; |
3062 | ||
3063 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3064 | ||
3065 | /* Load the relocations for this section. */ | |
3066 | internal_relocs = (_bfd_elf_link_read_relocs | |
3067 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
3068 | link_info->keep_memory)); | |
3069 | if (internal_relocs == NULL) | |
3070 | return FALSE; | |
3071 | ||
c175a657 | 3072 | changed = FALSE; |
0afcef53 | 3073 | htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA); |
daa67607 L |
3074 | local_got_refcounts = elf_local_got_refcounts (abfd); |
3075 | ||
3076 | /* Get the section contents. */ | |
3077 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
3078 | contents = elf_section_data (sec)->this_hdr.contents; | |
3079 | else | |
3080 | { | |
3081 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
3082 | goto error_return; | |
3083 | } | |
3084 | ||
3085 | irelend = internal_relocs + sec->reloc_count; | |
3086 | for (irel = internal_relocs; irel < irelend; irel++) | |
3087 | { | |
3088 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
c175a657 | 3089 | unsigned int r_symndx; |
daa67607 | 3090 | struct elf_link_hash_entry *h; |
c175a657 | 3091 | bfd_boolean converted; |
59cab532 | 3092 | |
c175a657 L |
3093 | if (r_type != R_X86_64_GOTPCRELX |
3094 | && r_type != R_X86_64_REX_GOTPCRELX | |
3095 | && r_type != R_X86_64_GOTPCREL) | |
dfc87947 L |
3096 | continue; |
3097 | ||
c175a657 | 3098 | r_symndx = htab->r_sym (irel->r_info); |
daa67607 | 3099 | if (r_symndx < symtab_hdr->sh_info) |
0afcef53 L |
3100 | h = _bfd_elf_x86_get_local_sym_hash (htab, sec->owner, |
3101 | (const Elf_Internal_Rela *) irel, | |
3102 | FALSE); | |
59cab532 L |
3103 | else |
3104 | { | |
c175a657 | 3105 | h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info]; |
59cab532 L |
3106 | while (h->root.type == bfd_link_hash_indirect |
3107 | || h->root.type == bfd_link_hash_warning) | |
3108 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
59cab532 L |
3109 | } |
3110 | ||
c175a657 L |
3111 | /* STT_GNU_IFUNC must keep GOTPCREL relocations. */ |
3112 | if (h != NULL && h->type == STT_GNU_IFUNC) | |
3113 | continue; | |
daa67607 | 3114 | |
c175a657 L |
3115 | converted = FALSE; |
3116 | if (!elf_x86_64_convert_load_reloc (abfd, sec, contents, irel, h, | |
3117 | &converted, link_info)) | |
3118 | goto error_return; | |
56ceb5b5 | 3119 | |
c175a657 | 3120 | if (converted) |
56ceb5b5 | 3121 | { |
c175a657 L |
3122 | changed = converted; |
3123 | if (h) | |
56ceb5b5 | 3124 | { |
c175a657 L |
3125 | if (h->got.refcount > 0) |
3126 | h->got.refcount -= 1; | |
56ceb5b5 L |
3127 | } |
3128 | else | |
3129 | { | |
c175a657 L |
3130 | if (local_got_refcounts != NULL |
3131 | && local_got_refcounts[r_symndx] > 0) | |
3132 | local_got_refcounts[r_symndx] -= 1; | |
56ceb5b5 | 3133 | } |
daa67607 L |
3134 | } |
3135 | } | |
3136 | ||
3137 | if (contents != NULL | |
3138 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3139 | { | |
c175a657 | 3140 | if (!changed && !link_info->keep_memory) |
daa67607 L |
3141 | free (contents); |
3142 | else | |
3143 | { | |
3144 | /* Cache the section contents for elf_link_input_bfd. */ | |
3145 | elf_section_data (sec)->this_hdr.contents = contents; | |
3146 | } | |
3147 | } | |
3148 | ||
3149 | if (elf_section_data (sec)->relocs != internal_relocs) | |
3150 | { | |
c175a657 | 3151 | if (!changed) |
daa67607 L |
3152 | free (internal_relocs); |
3153 | else | |
3154 | elf_section_data (sec)->relocs = internal_relocs; | |
3155 | } | |
3156 | ||
3157 | return TRUE; | |
3158 | ||
3159 | error_return: | |
3160 | if (contents != NULL | |
3161 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3162 | free (contents); | |
3163 | if (internal_relocs != NULL | |
3164 | && elf_section_data (sec)->relocs != internal_relocs) | |
3165 | free (internal_relocs); | |
3166 | return FALSE; | |
3167 | } | |
3168 | ||
70256ad8 AJ |
3169 | /* Set the sizes of the dynamic sections. */ |
3170 | ||
b34976b6 | 3171 | static bfd_boolean |
351f65ca L |
3172 | elf_x86_64_size_dynamic_sections (bfd *output_bfd, |
3173 | struct bfd_link_info *info) | |
70256ad8 | 3174 | { |
0afcef53 | 3175 | struct elf_x86_link_hash_table *htab; |
70256ad8 AJ |
3176 | bfd *dynobj; |
3177 | asection *s; | |
b34976b6 | 3178 | bfd_boolean relocs; |
c434dee6 | 3179 | bfd *ibfd; |
351f65ca | 3180 | const struct elf_backend_data *bed; |
70256ad8 | 3181 | |
0afcef53 | 3182 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
3183 | if (htab == NULL) |
3184 | return FALSE; | |
351f65ca | 3185 | bed = get_elf_backend_data (output_bfd); |
4dfe6ac6 | 3186 | |
c434dee6 AJ |
3187 | dynobj = htab->elf.dynobj; |
3188 | if (dynobj == NULL) | |
3189 | abort (); | |
70256ad8 | 3190 | |
c434dee6 AJ |
3191 | /* Set up .got offsets for local syms, and space for local dynamic |
3192 | relocs. */ | |
c72f2fb2 | 3193 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
70256ad8 | 3194 | { |
c434dee6 AJ |
3195 | bfd_signed_vma *local_got; |
3196 | bfd_signed_vma *end_local_got; | |
bffbf940 | 3197 | char *local_tls_type; |
67a4f2b7 | 3198 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
3199 | bfd_size_type locsymcount; |
3200 | Elf_Internal_Shdr *symtab_hdr; | |
3201 | asection *srel; | |
70256ad8 | 3202 | |
0ffa91dd | 3203 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
3204 | continue; |
3205 | ||
c434dee6 | 3206 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 3207 | { |
e03a8ed8 | 3208 | struct elf_dyn_relocs *p; |
c434dee6 | 3209 | |
56ceb5b5 | 3210 | if (!elf_x86_64_convert_load (ibfd, s, info)) |
daa67607 L |
3211 | return FALSE; |
3212 | ||
e03a8ed8 | 3213 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 3214 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
3215 | p != NULL; |
3216 | p = p->next) | |
70256ad8 | 3217 | { |
c434dee6 AJ |
3218 | if (!bfd_is_abs_section (p->sec) |
3219 | && bfd_is_abs_section (p->sec->output_section)) | |
3220 | { | |
3221 | /* Input section has been discarded, either because | |
3222 | it is a copy of a linkonce section or due to | |
3223 | linker script /DISCARD/, so we'll be discarding | |
3224 | the relocs too. */ | |
3225 | } | |
3226 | else if (p->count != 0) | |
3227 | { | |
3228 | srel = elf_section_data (p->sec)->sreloc; | |
351f65ca | 3229 | srel->size += p->count * bed->s->sizeof_rela; |
4b819e1f L |
3230 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
3231 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
3232 | { |
3233 | info->flags |= DF_TEXTREL; | |
0e1862bb | 3234 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd | 3235 | || info->error_textrel) |
695344c0 | 3236 | /* xgettext:c-format */ |
1952c5cd | 3237 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), |
b70321a2 | 3238 | p->sec->owner, p->sec); |
b70321a2 | 3239 | } |
c434dee6 | 3240 | } |
70256ad8 AJ |
3241 | } |
3242 | } | |
c434dee6 AJ |
3243 | |
3244 | local_got = elf_local_got_refcounts (ibfd); | |
3245 | if (!local_got) | |
3246 | continue; | |
3247 | ||
0ffa91dd | 3248 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
3249 | locsymcount = symtab_hdr->sh_info; |
3250 | end_local_got = local_got + locsymcount; | |
0afcef53 L |
3251 | local_tls_type = elf_x86_local_got_tls_type (ibfd); |
3252 | local_tlsdesc_gotent = elf_x86_local_tlsdesc_gotent (ibfd); | |
6de2ae4a L |
3253 | s = htab->elf.sgot; |
3254 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
3255 | for (; local_got < end_local_got; |
3256 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 3257 | { |
67a4f2b7 | 3258 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 3259 | if (*local_got > 0) |
70256ad8 | 3260 | { |
67a4f2b7 AO |
3261 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
3262 | { | |
6de2ae4a | 3263 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
351f65ca | 3264 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 3265 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
3266 | *local_got = (bfd_vma) -2; |
3267 | } | |
3268 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3269 | || GOT_TLS_GD_P (*local_tls_type)) | |
3270 | { | |
3271 | *local_got = s->size; | |
3272 | s->size += GOT_ENTRY_SIZE; | |
3273 | if (GOT_TLS_GD_P (*local_tls_type)) | |
3274 | s->size += GOT_ENTRY_SIZE; | |
3275 | } | |
0e1862bb | 3276 | if (bfd_link_pic (info) |
67a4f2b7 | 3277 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 3278 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
3279 | { |
3280 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
3281 | { | |
6de2ae4a | 3282 | htab->elf.srelplt->size |
351f65ca | 3283 | += bed->s->sizeof_rela; |
67a4f2b7 AO |
3284 | htab->tlsdesc_plt = (bfd_vma) -1; |
3285 | } | |
3286 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3287 | || GOT_TLS_GD_P (*local_tls_type)) | |
351f65ca | 3288 | srel->size += bed->s->sizeof_rela; |
67a4f2b7 | 3289 | } |
70256ad8 AJ |
3290 | } |
3291 | else | |
c434dee6 AJ |
3292 | *local_got = (bfd_vma) -1; |
3293 | } | |
3294 | } | |
70256ad8 | 3295 | |
0afcef53 | 3296 | if (htab->tls_ld_or_ldm_got.refcount > 0) |
bffbf940 JJ |
3297 | { |
3298 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
3299 | relocs. */ | |
0afcef53 | 3300 | htab->tls_ld_or_ldm_got.offset = htab->elf.sgot->size; |
6de2ae4a | 3301 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; |
351f65ca | 3302 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
bffbf940 JJ |
3303 | } |
3304 | else | |
0afcef53 | 3305 | htab->tls_ld_or_ldm_got.offset = -1; |
bffbf940 | 3306 | |
c434dee6 AJ |
3307 | /* Allocate global sym .plt and .got entries, and space for global |
3308 | sym dynamic relocs. */ | |
351f65ca | 3309 | elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs, |
eb4ff4d6 | 3310 | info); |
c434dee6 | 3311 | |
c25bc9fc L |
3312 | /* Allocate .plt and .got entries, and space for local symbols. */ |
3313 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 3314 | elf_x86_64_allocate_local_dynrelocs, |
c25bc9fc L |
3315 | info); |
3316 | ||
67a4f2b7 AO |
3317 | /* For every jump slot reserved in the sgotplt, reloc_count is |
3318 | incremented. However, when we reserve space for TLS descriptors, | |
3319 | it's not incremented, so in order to compute the space reserved | |
3320 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 L |
3321 | slot size. |
3322 | ||
3323 | PR ld/13302: We start next_irelative_index at the end of .rela.plt | |
3324 | so that R_X86_64_IRELATIVE entries come last. */ | |
6de2ae4a | 3325 | if (htab->elf.srelplt) |
e1f98742 L |
3326 | { |
3327 | htab->sgotplt_jump_table_size | |
3328 | = elf_x86_64_compute_jump_table_size (htab); | |
3329 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
3330 | } | |
3331 | else if (htab->elf.irelplt) | |
3332 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
67a4f2b7 AO |
3333 | |
3334 | if (htab->tlsdesc_plt) | |
3335 | { | |
3336 | /* If we're not using lazy TLS relocations, don't generate the | |
3337 | PLT and GOT entries they require. */ | |
3338 | if ((info->flags & DF_BIND_NOW)) | |
3339 | htab->tlsdesc_plt = 0; | |
3340 | else | |
3341 | { | |
6de2ae4a L |
3342 | htab->tlsdesc_got = htab->elf.sgot->size; |
3343 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
3344 | /* Reserve room for the initial entry. |
3345 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a | 3346 | if (htab->elf.splt->size == 0) |
765e526c | 3347 | htab->elf.splt->size = htab->plt.plt_entry_size; |
6de2ae4a | 3348 | htab->tlsdesc_plt = htab->elf.splt->size; |
765e526c | 3349 | htab->elf.splt->size += htab->plt.plt_entry_size; |
67a4f2b7 AO |
3350 | } |
3351 | } | |
3352 | ||
a7b16ceb L |
3353 | if (htab->elf.sgotplt) |
3354 | { | |
3355 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
eed180f8 | 3356 | entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
3357 | if ((htab->elf.hgot == NULL |
3358 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
3359 | && (htab->elf.sgotplt->size |
3360 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
3361 | && (htab->elf.splt == NULL |
3362 | || htab->elf.splt->size == 0) | |
3363 | && (htab->elf.sgot == NULL | |
3364 | || htab->elf.sgot->size == 0) | |
3365 | && (htab->elf.iplt == NULL | |
3366 | || htab->elf.iplt->size == 0) | |
3367 | && (htab->elf.igotplt == NULL | |
3368 | || htab->elf.igotplt->size == 0)) | |
3369 | htab->elf.sgotplt->size = 0; | |
3370 | } | |
3371 | ||
fff53dae | 3372 | if (_bfd_elf_eh_frame_present (info)) |
9a2a56cc | 3373 | { |
fff53dae L |
3374 | if (htab->plt_eh_frame != NULL |
3375 | && htab->elf.splt != NULL | |
3376 | && htab->elf.splt->size != 0 | |
3377 | && !bfd_is_abs_section (htab->elf.splt->output_section)) | |
765e526c | 3378 | htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size; |
fff53dae L |
3379 | |
3380 | if (htab->plt_got_eh_frame != NULL | |
3381 | && htab->plt_got != NULL | |
3382 | && htab->plt_got->size != 0 | |
3383 | && !bfd_is_abs_section (htab->plt_got->output_section)) | |
38b12349 | 3384 | htab->plt_got_eh_frame->size |
765e526c | 3385 | = htab->non_lazy_plt->eh_frame_plt_size; |
8361ed4d | 3386 | |
f2c29a16 | 3387 | /* Unwind info for the second PLT and .plt.got sections are |
8361ed4d | 3388 | identical. */ |
f2c29a16 L |
3389 | if (htab->plt_second_eh_frame != NULL |
3390 | && htab->plt_second != NULL | |
3391 | && htab->plt_second->size != 0 | |
3392 | && !bfd_is_abs_section (htab->plt_second->output_section)) | |
3393 | htab->plt_second_eh_frame->size | |
765e526c | 3394 | = htab->non_lazy_plt->eh_frame_plt_size; |
9a2a56cc AM |
3395 | } |
3396 | ||
c434dee6 AJ |
3397 | /* We now have determined the sizes of the various dynamic sections. |
3398 | Allocate memory for them. */ | |
b34976b6 | 3399 | relocs = FALSE; |
c434dee6 AJ |
3400 | for (s = dynobj->sections; s != NULL; s = s->next) |
3401 | { | |
3402 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3403 | continue; | |
3404 | ||
6de2ae4a L |
3405 | if (s == htab->elf.splt |
3406 | || s == htab->elf.sgot | |
3407 | || s == htab->elf.sgotplt | |
3408 | || s == htab->elf.iplt | |
3409 | || s == htab->elf.igotplt | |
f2c29a16 | 3410 | || s == htab->plt_second |
dd7e64d4 | 3411 | || s == htab->plt_got |
9a2a56cc | 3412 | || s == htab->plt_eh_frame |
fff53dae | 3413 | || s == htab->plt_got_eh_frame |
f2c29a16 | 3414 | || s == htab->plt_second_eh_frame |
5474d94f AM |
3415 | || s == htab->elf.sdynbss |
3416 | || s == htab->elf.sdynrelro) | |
c434dee6 AJ |
3417 | { |
3418 | /* Strip this section if we don't need it; see the | |
3419 | comment below. */ | |
3420 | } | |
0112cd26 | 3421 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 3422 | { |
6de2ae4a | 3423 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 3424 | relocs = TRUE; |
c434dee6 AJ |
3425 | |
3426 | /* We use the reloc_count field as a counter if we need | |
3427 | to copy relocs into the output file. */ | |
6de2ae4a | 3428 | if (s != htab->elf.srelplt) |
67a4f2b7 | 3429 | s->reloc_count = 0; |
70256ad8 | 3430 | } |
c434dee6 | 3431 | else |
70256ad8 AJ |
3432 | { |
3433 | /* It's not one of our sections, so don't allocate space. */ | |
3434 | continue; | |
3435 | } | |
3436 | ||
eea6121a | 3437 | if (s->size == 0) |
70256ad8 | 3438 | { |
c434dee6 AJ |
3439 | /* If we don't need this section, strip it from the |
3440 | output file. This is mostly to handle .rela.bss and | |
3441 | .rela.plt. We must create both sections in | |
3442 | create_dynamic_sections, because they must be created | |
3443 | before the linker maps input sections to output | |
3444 | sections. The linker does that before | |
3445 | adjust_dynamic_symbol is called, and it is that | |
3446 | function which decides whether anything needs to go | |
3447 | into these sections. */ | |
3448 | ||
8423293d | 3449 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
3450 | continue; |
3451 | } | |
3452 | ||
c456f082 AM |
3453 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3454 | continue; | |
3455 | ||
70256ad8 AJ |
3456 | /* Allocate memory for the section contents. We use bfd_zalloc |
3457 | here in case unused entries are not reclaimed before the | |
3458 | section's contents are written out. This should not happen, | |
3459 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
3460 | of garbage. */ | |
eea6121a | 3461 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 3462 | if (s->contents == NULL) |
b34976b6 | 3463 | return FALSE; |
70256ad8 AJ |
3464 | } |
3465 | ||
e41b3a13 | 3466 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3467 | && htab->plt_eh_frame->contents != NULL) |
3468 | { | |
9a2a56cc | 3469 | memcpy (htab->plt_eh_frame->contents, |
765e526c | 3470 | htab->plt.eh_frame_plt, htab->plt_eh_frame->size); |
9a2a56cc AM |
3471 | bfd_put_32 (dynobj, htab->elf.splt->size, |
3472 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
3473 | } | |
e41b3a13 | 3474 | |
fff53dae L |
3475 | if (htab->plt_got_eh_frame != NULL |
3476 | && htab->plt_got_eh_frame->contents != NULL) | |
3477 | { | |
fff53dae | 3478 | memcpy (htab->plt_got_eh_frame->contents, |
765e526c | 3479 | htab->non_lazy_plt->eh_frame_plt, |
fff53dae L |
3480 | htab->plt_got_eh_frame->size); |
3481 | bfd_put_32 (dynobj, htab->plt_got->size, | |
3482 | (htab->plt_got_eh_frame->contents | |
3483 | + PLT_FDE_LEN_OFFSET)); | |
3484 | } | |
3485 | ||
f2c29a16 L |
3486 | if (htab->plt_second_eh_frame != NULL |
3487 | && htab->plt_second_eh_frame->contents != NULL) | |
8361ed4d | 3488 | { |
f2c29a16 | 3489 | memcpy (htab->plt_second_eh_frame->contents, |
765e526c | 3490 | htab->non_lazy_plt->eh_frame_plt, |
f2c29a16 L |
3491 | htab->plt_second_eh_frame->size); |
3492 | bfd_put_32 (dynobj, htab->plt_second->size, | |
3493 | (htab->plt_second_eh_frame->contents | |
8361ed4d L |
3494 | + PLT_FDE_LEN_OFFSET)); |
3495 | } | |
3496 | ||
c434dee6 | 3497 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
3498 | { |
3499 | /* Add some entries to the .dynamic section. We fill in the | |
351f65ca | 3500 | values later, in elf_x86_64_finish_dynamic_sections, but we |
70256ad8 | 3501 | must add the entries now so that we get the correct size for |
407443a3 | 3502 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 3503 | dynamic linker and used by the debugger. */ |
dc810e39 | 3504 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3505 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3506 | |
0e1862bb | 3507 | if (bfd_link_executable (info)) |
70256ad8 | 3508 | { |
dc810e39 | 3509 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3510 | return FALSE; |
70256ad8 AJ |
3511 | } |
3512 | ||
6de2ae4a | 3513 | if (htab->elf.splt->size != 0) |
70256ad8 | 3514 | { |
7c1e8d3e L |
3515 | /* DT_PLTGOT is used by prelink even if there is no PLT |
3516 | relocation. */ | |
3517 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
b34976b6 | 3518 | return FALSE; |
97d343d4 | 3519 | } |
67a4f2b7 | 3520 | |
97d343d4 L |
3521 | if (htab->elf.srelplt->size != 0) |
3522 | { | |
3523 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
3524 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
3525 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
67a4f2b7 | 3526 | return FALSE; |
70256ad8 AJ |
3527 | } |
3528 | ||
97d343d4 L |
3529 | if (htab->tlsdesc_plt |
3530 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
3531 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
3532 | return FALSE; | |
3533 | ||
70256ad8 AJ |
3534 | if (relocs) |
3535 | { | |
dc810e39 AM |
3536 | if (!add_dynamic_entry (DT_RELA, 0) |
3537 | || !add_dynamic_entry (DT_RELASZ, 0) | |
351f65ca | 3538 | || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela)) |
b34976b6 | 3539 | return FALSE; |
70256ad8 | 3540 | |
c434dee6 AJ |
3541 | /* If any dynamic relocs apply to a read-only section, |
3542 | then we need a DT_TEXTREL entry. */ | |
3543 | if ((info->flags & DF_TEXTREL) == 0) | |
eed180f8 | 3544 | elf_link_hash_traverse (&htab->elf, |
0afcef53 | 3545 | _bfd_x86_elf_readonly_dynrelocs, |
eb4ff4d6 | 3546 | info); |
c434dee6 AJ |
3547 | |
3548 | if ((info->flags & DF_TEXTREL) != 0) | |
3549 | { | |
2df3368d | 3550 | if (htab->readonly_dynrelocs_against_ifunc) |
8efa2874 L |
3551 | { |
3552 | info->callbacks->einfo | |
3553 | (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n")); | |
3554 | bfd_set_error (bfd_error_bad_value); | |
3555 | return FALSE; | |
3556 | } | |
3557 | ||
c434dee6 | 3558 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 3559 | return FALSE; |
c434dee6 | 3560 | } |
70256ad8 AJ |
3561 | } |
3562 | } | |
dc810e39 | 3563 | #undef add_dynamic_entry |
70256ad8 | 3564 | |
b34976b6 | 3565 | return TRUE; |
70256ad8 AJ |
3566 | } |
3567 | ||
bffbf940 JJ |
3568 | /* Return the relocation value for @tpoff relocation |
3569 | if STT_TLS virtual address is ADDRESS. */ | |
3570 | ||
3571 | static bfd_vma | |
351f65ca | 3572 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 3573 | { |
e1918d23 | 3574 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3575 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3576 | bfd_vma static_tls_size; | |
bffbf940 JJ |
3577 | |
3578 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 3579 | if (htab->tls_sec == NULL) |
bffbf940 | 3580 | return 0; |
7dc98aea RO |
3581 | |
3582 | /* Consider special static TLS alignment requirements. */ | |
3583 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3584 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
3585 | } |
3586 | ||
90f487df L |
3587 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
3588 | branch? */ | |
3589 | ||
3590 | static bfd_boolean | |
3591 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
3592 | { | |
3593 | /* Opcode Instruction | |
3594 | 0xe8 call | |
3595 | 0xe9 jump | |
3596 | 0x0f 0x8x conditional jump */ | |
3597 | return ((offset > 0 | |
3598 | && (contents [offset - 1] == 0xe8 | |
3599 | || contents [offset - 1] == 0xe9)) | |
3600 | || (offset > 1 | |
3601 | && contents [offset - 2] == 0x0f | |
3602 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
3603 | } | |
3604 | ||
8d88c4ca NC |
3605 | /* Relocate an x86_64 ELF section. */ |
3606 | ||
b34976b6 | 3607 | static bfd_boolean |
351f65ca L |
3608 | elf_x86_64_relocate_section (bfd *output_bfd, |
3609 | struct bfd_link_info *info, | |
3610 | bfd *input_bfd, | |
3611 | asection *input_section, | |
3612 | bfd_byte *contents, | |
3613 | Elf_Internal_Rela *relocs, | |
3614 | Elf_Internal_Sym *local_syms, | |
3615 | asection **local_sections) | |
8d88c4ca | 3616 | { |
0afcef53 | 3617 | struct elf_x86_link_hash_table *htab; |
8d88c4ca NC |
3618 | Elf_Internal_Shdr *symtab_hdr; |
3619 | struct elf_link_hash_entry **sym_hashes; | |
3620 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3621 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 3622 | Elf_Internal_Rela *rel; |
60f2e42e | 3623 | Elf_Internal_Rela *wrel; |
8d88c4ca | 3624 | Elf_Internal_Rela *relend; |
38b12349 | 3625 | unsigned int plt_entry_size; |
8d88c4ca | 3626 | |
0ffa91dd NC |
3627 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
3628 | ||
338c190a L |
3629 | /* Skip if check_relocs failed. */ |
3630 | if (input_section->check_relocs_failed) | |
3631 | return FALSE; | |
3632 | ||
0afcef53 | 3633 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
3634 | if (htab == NULL) |
3635 | return FALSE; | |
765e526c | 3636 | plt_entry_size = htab->plt.plt_entry_size; |
0ffa91dd | 3637 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
3638 | sym_hashes = elf_sym_hashes (input_bfd); |
3639 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
0afcef53 | 3640 | local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 3641 | |
0afcef53 | 3642 | _bfd_x86_elf_set_tls_module_base (info); |
9f03412a | 3643 | |
60f2e42e | 3644 | rel = wrel = relocs; |
8d88c4ca | 3645 | relend = relocs + input_section->reloc_count; |
60f2e42e | 3646 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 3647 | { |
bffbf940 | 3648 | unsigned int r_type; |
8d88c4ca NC |
3649 | reloc_howto_type *howto; |
3650 | unsigned long r_symndx; | |
3651 | struct elf_link_hash_entry *h; | |
0afcef53 | 3652 | struct elf_x86_link_hash_entry *eh; |
8d88c4ca NC |
3653 | Elf_Internal_Sym *sym; |
3654 | asection *sec; | |
0ff2b86e | 3655 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 3656 | bfd_vma relocation; |
b34976b6 | 3657 | bfd_boolean unresolved_reloc; |
8d88c4ca | 3658 | bfd_reloc_status_type r; |
bffbf940 | 3659 | int tls_type; |
0ff2b86e | 3660 | asection *base_got, *resolved_plt; |
1788fc08 | 3661 | bfd_vma st_size; |
aec6b87e | 3662 | bfd_boolean resolved_to_zero; |
9e9821dd | 3663 | bfd_boolean relative_reloc; |
8d88c4ca | 3664 | |
351f65ca | 3665 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
3666 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
3667 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
3668 | { |
3669 | if (wrel != rel) | |
3670 | *wrel = *rel; | |
3671 | continue; | |
3672 | } | |
8d88c4ca | 3673 | |
9911c0fc | 3674 | if (r_type >= (int) R_X86_64_standard) |
47aeb64c | 3675 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
8d88c4ca | 3676 | |
d7921315 | 3677 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 3678 | || ABI_64_P (output_bfd)) |
d7921315 L |
3679 | howto = x86_64_elf_howto_table + r_type; |
3680 | else | |
3681 | howto = (x86_64_elf_howto_table | |
3682 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 3683 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
3684 | h = NULL; |
3685 | sym = NULL; | |
3686 | sec = NULL; | |
b34976b6 | 3687 | unresolved_reloc = FALSE; |
8d88c4ca | 3688 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
3689 | { |
3690 | sym = local_syms + r_symndx; | |
3691 | sec = local_sections[r_symndx]; | |
c434dee6 | 3692 | |
c25bc9fc L |
3693 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
3694 | &sec, rel); | |
1788fc08 | 3695 | st_size = sym->st_size; |
c25bc9fc L |
3696 | |
3697 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 3698 | if (!bfd_link_relocatable (info) |
351f65ca | 3699 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 3700 | { |
0afcef53 L |
3701 | h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, |
3702 | rel, FALSE); | |
c25bc9fc L |
3703 | if (h == NULL) |
3704 | abort (); | |
3705 | ||
eed180f8 | 3706 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
3707 | h->root.u.def.value = sym->st_value; |
3708 | h->root.u.def.section = sec; | |
3709 | } | |
8da6118f | 3710 | } |
8d88c4ca | 3711 | else |
8da6118f | 3712 | { |
c9736ba0 | 3713 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 3714 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
c434dee6 | 3715 | |
b2a8e766 AM |
3716 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3717 | r_symndx, symtab_hdr, sym_hashes, | |
3718 | h, sec, relocation, | |
62d887d4 | 3719 | unresolved_reloc, warned, ignored); |
1788fc08 | 3720 | st_size = h->size; |
8da6118f | 3721 | } |
ab96bf03 | 3722 | |
dbaa2011 | 3723 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
3724 | { |
3725 | _bfd_clear_contents (howto, input_bfd, input_section, | |
3726 | contents + rel->r_offset); | |
3727 | wrel->r_offset = rel->r_offset; | |
3728 | wrel->r_info = 0; | |
3729 | wrel->r_addend = 0; | |
3730 | ||
3731 | /* For ld -r, remove relocations in debug sections against | |
3732 | sections defined in discarded sections. Not done for | |
3733 | eh_frame editing code expects to be present. */ | |
3734 | if (bfd_link_relocatable (info) | |
3735 | && (input_section->flags & SEC_DEBUGGING)) | |
3736 | wrel--; | |
3737 | ||
3738 | continue; | |
3739 | } | |
ab96bf03 | 3740 | |
0e1862bb | 3741 | if (bfd_link_relocatable (info)) |
2d5da473 L |
3742 | { |
3743 | if (wrel != rel) | |
3744 | *wrel = *rel; | |
3745 | continue; | |
3746 | } | |
ab96bf03 | 3747 | |
1788fc08 | 3748 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 3749 | { |
1788fc08 L |
3750 | if (r_type == R_X86_64_64) |
3751 | { | |
3752 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
3753 | zero-extend it to 64bit if addend is zero. */ | |
3754 | r_type = R_X86_64_32; | |
3755 | memset (contents + rel->r_offset + 4, 0, 4); | |
3756 | } | |
3757 | else if (r_type == R_X86_64_SIZE64) | |
3758 | { | |
3759 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
3760 | zero-extend it to 64bit if addend is zero. */ | |
3761 | r_type = R_X86_64_SIZE32; | |
3762 | memset (contents + rel->r_offset + 4, 0, 4); | |
3763 | } | |
64d25c44 L |
3764 | } |
3765 | ||
0afcef53 | 3766 | eh = (struct elf_x86_link_hash_entry *) h; |
0ff2b86e | 3767 | |
cbe950e9 L |
3768 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3769 | it here if it is defined in a non-shared object. */ | |
3770 | if (h != NULL | |
3771 | && h->type == STT_GNU_IFUNC | |
3772 | && h->def_regular) | |
3773 | { | |
cbe950e9 | 3774 | bfd_vma plt_index; |
4c544807 | 3775 | const char *name; |
cbe950e9 | 3776 | |
97dc35c8 L |
3777 | if ((input_section->flags & SEC_ALLOC) == 0) |
3778 | { | |
3779 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
3780 | sections because such sections are not SEC_ALLOC and | |
3781 | thus ld.so will not process them. */ | |
3782 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 3783 | continue; |
97dc35c8 L |
3784 | abort (); |
3785 | } | |
233cc9c1 L |
3786 | |
3787 | switch (r_type) | |
3788 | { | |
3789 | default: | |
3790 | break; | |
3791 | ||
3792 | case R_X86_64_GOTPCREL: | |
3793 | case R_X86_64_GOTPCRELX: | |
3794 | case R_X86_64_REX_GOTPCRELX: | |
3795 | case R_X86_64_GOTPCREL64: | |
3796 | base_got = htab->elf.sgot; | |
3797 | off = h->got.offset; | |
3798 | ||
3799 | if (base_got == NULL) | |
3800 | abort (); | |
3801 | ||
3802 | if (off == (bfd_vma) -1) | |
3803 | { | |
3804 | /* We can't use h->got.offset here to save state, or | |
3805 | even just remember the offset, as finish_dynamic_symbol | |
3806 | would use that as offset into .got. */ | |
3807 | ||
3808 | if (h->plt.offset == (bfd_vma) -1) | |
3809 | abort (); | |
3810 | ||
3811 | if (htab->elf.splt != NULL) | |
3812 | { | |
38b12349 | 3813 | plt_index = (h->plt.offset / plt_entry_size |
765e526c | 3814 | - htab->plt.has_plt0); |
233cc9c1 L |
3815 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
3816 | base_got = htab->elf.sgotplt; | |
3817 | } | |
3818 | else | |
3819 | { | |
3820 | plt_index = h->plt.offset / plt_entry_size; | |
3821 | off = plt_index * GOT_ENTRY_SIZE; | |
3822 | base_got = htab->elf.igotplt; | |
3823 | } | |
3824 | ||
3825 | if (h->dynindx == -1 | |
3826 | || h->forced_local | |
3827 | || info->symbolic) | |
3828 | { | |
3829 | /* This references the local defitionion. We must | |
3830 | initialize this entry in the global offset table. | |
3831 | Since the offset must always be a multiple of 8, | |
3832 | we use the least significant bit to record | |
3833 | whether we have initialized it already. | |
3834 | ||
3835 | When doing a dynamic link, we create a .rela.got | |
3836 | relocation entry to initialize the value. This | |
3837 | is done in the finish_dynamic_symbol routine. */ | |
3838 | if ((off & 1) != 0) | |
3839 | off &= ~1; | |
3840 | else | |
3841 | { | |
3842 | bfd_put_64 (output_bfd, relocation, | |
3843 | base_got->contents + off); | |
3844 | /* Note that this is harmless for the GOTPLT64 | |
3845 | case, as -1 | 1 still is -1. */ | |
3846 | h->got.offset |= 1; | |
3847 | } | |
3848 | } | |
3849 | } | |
3850 | ||
3851 | relocation = (base_got->output_section->vma | |
3852 | + base_got->output_offset + off); | |
3853 | ||
3854 | goto do_relocation; | |
3855 | } | |
3856 | ||
3857 | if (h->plt.offset == (bfd_vma) -1) | |
3858 | { | |
3859 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
3860 | if (r_type == htab->pointer_r_type | |
3861 | && (input_section->flags & SEC_CODE) == 0) | |
3862 | goto do_ifunc_pointer; | |
3863 | goto bad_ifunc_reloc; | |
3864 | } | |
cbe950e9 L |
3865 | |
3866 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
3867 | if (htab->elf.splt != NULL) |
3868 | { | |
f2c29a16 | 3869 | if (htab->plt_second != NULL) |
0ff2b86e | 3870 | { |
f2c29a16 L |
3871 | resolved_plt = htab->plt_second; |
3872 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
3873 | } |
3874 | else | |
3875 | { | |
3876 | resolved_plt = htab->elf.splt; | |
3877 | plt_offset = h->plt.offset; | |
3878 | } | |
3879 | } | |
3880 | else | |
3881 | { | |
3882 | resolved_plt = htab->elf.iplt; | |
3883 | plt_offset = h->plt.offset; | |
3884 | } | |
3885 | ||
3886 | relocation = (resolved_plt->output_section->vma | |
3887 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
3888 | |
3889 | switch (r_type) | |
3890 | { | |
3891 | default: | |
233cc9c1 | 3892 | bad_ifunc_reloc: |
4c544807 L |
3893 | if (h->root.root.string) |
3894 | name = h->root.root.string; | |
3895 | else | |
3896 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
3897 | NULL); | |
4eca0228 | 3898 | _bfd_error_handler |
695344c0 | 3899 | /* xgettext:c-format */ |
cbe950e9 | 3900 | (_("%B: relocation %s against STT_GNU_IFUNC " |
233cc9c1 L |
3901 | "symbol `%s' isn't supported"), input_bfd, |
3902 | howto->name, name); | |
cbe950e9 L |
3903 | bfd_set_error (bfd_error_bad_value); |
3904 | return FALSE; | |
3905 | ||
3906 | case R_X86_64_32S: | |
0e1862bb | 3907 | if (bfd_link_pic (info)) |
cbe950e9 | 3908 | abort (); |
710ab287 L |
3909 | goto do_relocation; |
3910 | ||
248775ba L |
3911 | case R_X86_64_32: |
3912 | if (ABI_64_P (output_bfd)) | |
3913 | goto do_relocation; | |
17672001 | 3914 | /* FALLTHROUGH */ |
eed180f8 | 3915 | case R_X86_64_64: |
233cc9c1 | 3916 | do_ifunc_pointer: |
710ab287 L |
3917 | if (rel->r_addend != 0) |
3918 | { | |
4c544807 L |
3919 | if (h->root.root.string) |
3920 | name = h->root.root.string; | |
3921 | else | |
3922 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3923 | sym, NULL); | |
4eca0228 | 3924 | _bfd_error_handler |
695344c0 | 3925 | /* xgettext:c-format */ |
710ab287 | 3926 | (_("%B: relocation %s against STT_GNU_IFUNC " |
d42c267e | 3927 | "symbol `%s' has non-zero addend: %Ld"), |
ef77d6af | 3928 | input_bfd, howto->name, name, rel->r_addend); |
710ab287 L |
3929 | bfd_set_error (bfd_error_bad_value); |
3930 | return FALSE; | |
3931 | } | |
3932 | ||
3933 | /* Generate dynamic relcoation only when there is a | |
233cc9c1 L |
3934 | non-GOT reference in a shared object or there is no |
3935 | PLT. */ | |
3936 | if ((bfd_link_pic (info) && h->non_got_ref) | |
3937 | || h->plt.offset == (bfd_vma) -1) | |
710ab287 L |
3938 | { |
3939 | Elf_Internal_Rela outrel; | |
710ab287 L |
3940 | asection *sreloc; |
3941 | ||
c25bc9fc L |
3942 | /* Need a dynamic relocation to get the real function |
3943 | address. */ | |
710ab287 L |
3944 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
3945 | info, | |
3946 | input_section, | |
3947 | rel->r_offset); | |
3948 | if (outrel.r_offset == (bfd_vma) -1 | |
3949 | || outrel.r_offset == (bfd_vma) -2) | |
3950 | abort (); | |
3951 | ||
3952 | outrel.r_offset += (input_section->output_section->vma | |
3953 | + input_section->output_offset); | |
3954 | ||
3955 | if (h->dynindx == -1 | |
44c4ea11 | 3956 | || h->forced_local |
0e1862bb | 3957 | || bfd_link_executable (info)) |
710ab287 | 3958 | { |
6322e5c5 L |
3959 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
3960 | h->root.root.string, | |
3961 | h->root.u.def.section->owner); | |
3962 | ||
710ab287 | 3963 | /* This symbol is resolved locally. */ |
56b8aada L |
3964 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
3965 | outrel.r_addend = (h->root.u.def.value | |
3966 | + h->root.u.def.section->output_section->vma | |
3967 | + h->root.u.def.section->output_offset); | |
710ab287 L |
3968 | } |
3969 | else | |
3970 | { | |
351f65ca | 3971 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
3972 | outrel.r_addend = 0; |
3973 | } | |
3974 | ||
233cc9c1 L |
3975 | /* Dynamic relocations are stored in |
3976 | 1. .rela.ifunc section in PIC object. | |
3977 | 2. .rela.got section in dynamic executable. | |
3978 | 3. .rela.iplt section in static executable. */ | |
3979 | if (bfd_link_pic (info)) | |
3980 | sreloc = htab->elf.irelifunc; | |
3981 | else if (htab->elf.splt != NULL) | |
3982 | sreloc = htab->elf.srelgot; | |
3983 | else | |
3984 | sreloc = htab->elf.irelplt; | |
351f65ca | 3985 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
3986 | |
3987 | /* If this reloc is against an external symbol, we | |
3988 | do not want to fiddle with the addend. Otherwise, | |
3989 | we need to include the symbol value so that it | |
3990 | becomes an addend for the dynamic reloc. For an | |
3991 | internal symbol, we have updated addend. */ | |
56b8aada | 3992 | continue; |
710ab287 | 3993 | } |
17672001 | 3994 | /* FALLTHROUGH */ |
cbe950e9 | 3995 | case R_X86_64_PC32: |
c3320543 | 3996 | case R_X86_64_PC32_BND: |
cbe950e9 L |
3997 | case R_X86_64_PC64: |
3998 | case R_X86_64_PLT32: | |
c3320543 | 3999 | case R_X86_64_PLT32_BND: |
cbe950e9 | 4000 | goto do_relocation; |
cbe950e9 L |
4001 | } |
4002 | } | |
4003 | ||
aec6b87e | 4004 | resolved_to_zero = (eh != NULL |
e62b9723 | 4005 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
0afcef53 | 4006 | X86_64_ELF_DATA, |
e62b9723 L |
4007 | eh->has_got_reloc, |
4008 | eh)); | |
aec6b87e | 4009 | |
70256ad8 AJ |
4010 | /* When generating a shared object, the relocations handled here are |
4011 | copied into the output file to be resolved at run time. */ | |
4012 | switch (r_type) | |
4013 | { | |
4014 | case R_X86_64_GOT32: | |
7b81dfbb | 4015 | case R_X86_64_GOT64: |
70256ad8 AJ |
4016 | /* Relocation is to the entry for this symbol in the global |
4017 | offset table. */ | |
70256ad8 | 4018 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
4019 | case R_X86_64_GOTPCRELX: |
4020 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
4021 | case R_X86_64_GOTPCREL64: |
4022 | /* Use global offset table entry as symbol value. */ | |
4023 | case R_X86_64_GOTPLT64: | |
de194d85 | 4024 | /* This is obsolete and treated the same as GOT64. */ |
6de2ae4a | 4025 | base_got = htab->elf.sgot; |
7b81dfbb | 4026 | |
6de2ae4a | 4027 | if (htab->elf.sgot == NULL) |
c434dee6 | 4028 | abort (); |
053579d7 | 4029 | |
9e9821dd | 4030 | relative_reloc = FALSE; |
51e0a107 | 4031 | if (h != NULL) |
70256ad8 | 4032 | { |
b34976b6 | 4033 | bfd_boolean dyn; |
c434dee6 AJ |
4034 | |
4035 | off = h->got.offset; | |
7b81dfbb | 4036 | if (h->needs_plt |
eed180f8 | 4037 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
4038 | && off == (bfd_vma)-1) |
4039 | { | |
4040 | /* We can't use h->got.offset here to save | |
4041 | state, or even just remember the offset, as | |
4042 | finish_dynamic_symbol would use that as offset into | |
4043 | .got. */ | |
38b12349 | 4044 | bfd_vma plt_index = (h->plt.offset / plt_entry_size |
765e526c | 4045 | - htab->plt.has_plt0); |
7b81dfbb | 4046 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 4047 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
4048 | } |
4049 | ||
c434dee6 | 4050 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 4051 | |
0e1862bb L |
4052 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
4053 | || (bfd_link_pic (info) | |
27482721 | 4054 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
4055 | || (ELF_ST_VISIBILITY (h->other) |
4056 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
4057 | { |
4058 | /* This is actually a static link, or it is a -Bsymbolic | |
4059 | link and the symbol is defined locally, or the symbol | |
407443a3 | 4060 | was forced to be local because of a version file. We |
51e0a107 JH |
4061 | must initialize this entry in the global offset table. |
4062 | Since the offset must always be a multiple of 8, we | |
4063 | use the least significant bit to record whether we | |
4064 | have initialized it already. | |
4065 | ||
4066 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
4067 | relocation entry to initialize the value. This is |
4068 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
4069 | if ((off & 1) != 0) |
4070 | off &= ~1; | |
4071 | else | |
4072 | { | |
4073 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
4074 | base_got->contents + off); |
4075 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 4076 | as -1 | 1 still is -1. */ |
51e0a107 | 4077 | h->got.offset |= 1; |
9e9821dd L |
4078 | |
4079 | if (h->dynindx == -1 | |
4080 | && !h->forced_local | |
4081 | && h->root.type != bfd_link_hash_undefweak | |
4082 | && bfd_link_pic (info)) | |
4083 | { | |
4084 | /* If this symbol isn't dynamic in PIC, | |
4085 | generate R_X86_64_RELATIVE here. */ | |
4086 | eh->no_finish_dynamic_symbol = 1; | |
4087 | relative_reloc = TRUE; | |
4088 | } | |
51e0a107 JH |
4089 | } |
4090 | } | |
053579d7 | 4091 | else |
b34976b6 | 4092 | unresolved_reloc = FALSE; |
70256ad8 | 4093 | } |
51e0a107 JH |
4094 | else |
4095 | { | |
c434dee6 AJ |
4096 | if (local_got_offsets == NULL) |
4097 | abort (); | |
51e0a107 JH |
4098 | |
4099 | off = local_got_offsets[r_symndx]; | |
4100 | ||
4101 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
4102 | the least significant bit to record whether we have |
4103 | already generated the necessary reloc. */ | |
51e0a107 JH |
4104 | if ((off & 1) != 0) |
4105 | off &= ~1; | |
4106 | else | |
4107 | { | |
c434dee6 | 4108 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 4109 | base_got->contents + off); |
9e9821dd | 4110 | local_got_offsets[r_symndx] |= 1; |
51e0a107 | 4111 | |
0e1862bb | 4112 | if (bfd_link_pic (info)) |
9e9821dd | 4113 | relative_reloc = TRUE; |
51e0a107 | 4114 | } |
51e0a107 | 4115 | } |
6a2bda3f | 4116 | |
9e9821dd L |
4117 | if (relative_reloc) |
4118 | { | |
4119 | asection *s; | |
4120 | Elf_Internal_Rela outrel; | |
4121 | ||
4122 | /* We need to generate a R_X86_64_RELATIVE reloc | |
4123 | for the dynamic linker. */ | |
4124 | s = htab->elf.srelgot; | |
4125 | if (s == NULL) | |
4126 | abort (); | |
4127 | ||
4128 | outrel.r_offset = (base_got->output_section->vma | |
4129 | + base_got->output_offset | |
4130 | + off); | |
4131 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); | |
4132 | outrel.r_addend = relocation; | |
4133 | elf_append_rela (output_bfd, s, &outrel); | |
4134 | } | |
4135 | ||
c434dee6 AJ |
4136 | if (off >= (bfd_vma) -2) |
4137 | abort (); | |
4138 | ||
7b81dfbb AJ |
4139 | relocation = base_got->output_section->vma |
4140 | + base_got->output_offset + off; | |
56ceb5b5 L |
4141 | if (r_type != R_X86_64_GOTPCREL |
4142 | && r_type != R_X86_64_GOTPCRELX | |
4143 | && r_type != R_X86_64_REX_GOTPCRELX | |
4144 | && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
4145 | relocation -= htab->elf.sgotplt->output_section->vma |
4146 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 4147 | |
70256ad8 AJ |
4148 | break; |
4149 | ||
d6ab8113 JB |
4150 | case R_X86_64_GOTOFF64: |
4151 | /* Relocation is relative to the start of the global offset | |
4152 | table. */ | |
4153 | ||
3d949995 L |
4154 | /* Check to make sure it isn't a protected function or data |
4155 | symbol for shared library since it may not be local when | |
e3c0e327 L |
4156 | used as function address or with copy relocation. We also |
4157 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 4158 | if (bfd_link_pic (info) && h) |
d6ab8113 | 4159 | { |
e3c0e327 L |
4160 | if (!h->def_regular) |
4161 | { | |
4162 | const char *v; | |
4163 | ||
4164 | switch (ELF_ST_VISIBILITY (h->other)) | |
4165 | { | |
4166 | case STV_HIDDEN: | |
4167 | v = _("hidden symbol"); | |
4168 | break; | |
4169 | case STV_INTERNAL: | |
4170 | v = _("internal symbol"); | |
4171 | break; | |
4172 | case STV_PROTECTED: | |
4173 | v = _("protected symbol"); | |
4174 | break; | |
4175 | default: | |
4176 | v = _("symbol"); | |
4177 | break; | |
4178 | } | |
4179 | ||
4eca0228 | 4180 | _bfd_error_handler |
695344c0 | 4181 | /* xgettext:c-format */ |
63a5468a AM |
4182 | (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s" |
4183 | " `%s' can not be used when making a shared object"), | |
e3c0e327 L |
4184 | input_bfd, v, h->root.root.string); |
4185 | bfd_set_error (bfd_error_bad_value); | |
4186 | return FALSE; | |
4187 | } | |
0e1862bb | 4188 | else if (!bfd_link_executable (info) |
e3c0e327 L |
4189 | && !SYMBOL_REFERENCES_LOCAL (info, h) |
4190 | && (h->type == STT_FUNC | |
4191 | || h->type == STT_OBJECT) | |
4192 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
4193 | { | |
4eca0228 | 4194 | _bfd_error_handler |
695344c0 | 4195 | /* xgettext:c-format */ |
63a5468a AM |
4196 | (_("%B: relocation R_X86_64_GOTOFF64 against protected %s" |
4197 | " `%s' can not be used when making a shared object"), | |
e3c0e327 L |
4198 | input_bfd, |
4199 | h->type == STT_FUNC ? "function" : "data", | |
4200 | h->root.root.string); | |
4201 | bfd_set_error (bfd_error_bad_value); | |
d6ab8113 | 4202 | return FALSE; |
e3c0e327 | 4203 | } |
d6ab8113 JB |
4204 | } |
4205 | ||
4206 | /* Note that sgot is not involved in this | |
4207 | calculation. We always want the start of .got.plt. If we | |
4208 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
4209 | permitted by the ABI, we might have to change this | |
4210 | calculation. */ | |
6de2ae4a L |
4211 | relocation -= htab->elf.sgotplt->output_section->vma |
4212 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4213 | break; |
4214 | ||
4215 | case R_X86_64_GOTPC32: | |
7b81dfbb | 4216 | case R_X86_64_GOTPC64: |
d6ab8113 | 4217 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
4218 | relocation = htab->elf.sgotplt->output_section->vma |
4219 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4220 | unresolved_reloc = FALSE; |
4221 | break; | |
7b81dfbb AJ |
4222 | |
4223 | case R_X86_64_PLTOFF64: | |
4224 | /* Relocation is PLT entry relative to GOT. For local | |
4225 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 4226 | if (h != NULL |
7b81dfbb | 4227 | /* See PLT32 handling. */ |
9d734efa L |
4228 | && (h->plt.offset != (bfd_vma) -1 |
4229 | || eh->plt_got.offset != (bfd_vma) -1) | |
6de2ae4a | 4230 | && htab->elf.splt != NULL) |
7b81dfbb | 4231 | { |
9d734efa L |
4232 | if (eh->plt_got.offset != (bfd_vma) -1) |
4233 | { | |
4234 | /* Use the GOT PLT. */ | |
4235 | resolved_plt = htab->plt_got; | |
4236 | plt_offset = eh->plt_got.offset; | |
4237 | } | |
f2c29a16 | 4238 | else if (htab->plt_second != NULL) |
0ff2b86e | 4239 | { |
f2c29a16 L |
4240 | resolved_plt = htab->plt_second; |
4241 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
4242 | } |
4243 | else | |
4244 | { | |
4245 | resolved_plt = htab->elf.splt; | |
4246 | plt_offset = h->plt.offset; | |
4247 | } | |
4248 | ||
4249 | relocation = (resolved_plt->output_section->vma | |
4250 | + resolved_plt->output_offset | |
4251 | + plt_offset); | |
7b81dfbb AJ |
4252 | unresolved_reloc = FALSE; |
4253 | } | |
4254 | ||
6de2ae4a L |
4255 | relocation -= htab->elf.sgotplt->output_section->vma |
4256 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 4257 | break; |
d6ab8113 | 4258 | |
70256ad8 | 4259 | case R_X86_64_PLT32: |
c3320543 | 4260 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
4261 | /* Relocation is to the entry for this symbol in the |
4262 | procedure linkage table. */ | |
4263 | ||
4264 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 4265 | without using the procedure linkage table. */ |
70256ad8 AJ |
4266 | if (h == NULL) |
4267 | break; | |
4268 | ||
dd7e64d4 L |
4269 | if ((h->plt.offset == (bfd_vma) -1 |
4270 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 4271 | || htab->elf.splt == NULL) |
70256ad8 AJ |
4272 | { |
4273 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
4274 | happens when statically linking PIC code, or when |
4275 | using -Bsymbolic. */ | |
70256ad8 AJ |
4276 | break; |
4277 | } | |
4278 | ||
dd7e64d4 | 4279 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 4280 | { |
f2c29a16 | 4281 | if (htab->plt_second != NULL) |
dd7e64d4 | 4282 | { |
f2c29a16 L |
4283 | resolved_plt = htab->plt_second; |
4284 | plt_offset = eh->plt_second.offset; | |
dd7e64d4 L |
4285 | } |
4286 | else | |
4287 | { | |
4288 | resolved_plt = htab->elf.splt; | |
4289 | plt_offset = h->plt.offset; | |
4290 | } | |
0ff2b86e L |
4291 | } |
4292 | else | |
4293 | { | |
dd7e64d4 L |
4294 | /* Use the GOT PLT. */ |
4295 | resolved_plt = htab->plt_got; | |
4296 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
4297 | } |
4298 | ||
4299 | relocation = (resolved_plt->output_section->vma | |
4300 | + resolved_plt->output_offset | |
4301 | + plt_offset); | |
b34976b6 | 4302 | unresolved_reloc = FALSE; |
70256ad8 AJ |
4303 | break; |
4304 | ||
1788fc08 L |
4305 | case R_X86_64_SIZE32: |
4306 | case R_X86_64_SIZE64: | |
1788fc08 L |
4307 | /* Set to symbol size. */ |
4308 | relocation = st_size; | |
4309 | goto direct; | |
4310 | ||
fd8ab9e5 AJ |
4311 | case R_X86_64_PC8: |
4312 | case R_X86_64_PC16: | |
4313 | case R_X86_64_PC32: | |
c3320543 | 4314 | case R_X86_64_PC32_BND: |
6333bc0d | 4315 | /* Don't complain about -fPIC if the symbol is undefined when |
7073b5b9 L |
4316 | building executable unless it is unresolved weak symbol or |
4317 | -z nocopyreloc is used. */ | |
aec6b87e | 4318 | if ((input_section->flags & SEC_ALLOC) != 0 |
90f487df | 4319 | && (input_section->flags & SEC_READONLY) != 0 |
6333bc0d | 4320 | && h != NULL |
aec6b87e | 4321 | && ((bfd_link_executable (info) |
7073b5b9 L |
4322 | && ((h->root.type == bfd_link_hash_undefweak |
4323 | && !resolved_to_zero) | |
a5b4ee94 L |
4324 | || ((info->nocopyreloc |
4325 | || (eh->def_protected | |
4326 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
4327 | && h->def_dynamic |
4328 | && !(h->root.u.def.section->flags & SEC_CODE)))) | |
c5bb8910 | 4329 | || bfd_link_dll (info))) |
6610a52d | 4330 | { |
41bed6dd L |
4331 | bfd_boolean fail = FALSE; |
4332 | bfd_boolean branch | |
c3320543 L |
4333 | = ((r_type == R_X86_64_PC32 |
4334 | || r_type == R_X86_64_PC32_BND) | |
41bed6dd L |
4335 | && is_32bit_relative_branch (contents, rel->r_offset)); |
4336 | ||
4337 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
4338 | { | |
4339 | /* Symbol is referenced locally. Make sure it is | |
4340 | defined locally or for a branch. */ | |
8170f769 L |
4341 | fail = (!(h->def_regular || ELF_COMMON_DEF_P (h)) |
4342 | && !branch); | |
41bed6dd | 4343 | } |
aec6b87e | 4344 | else if (!(bfd_link_pie (info) |
bc696fd5 | 4345 | && (h->needs_copy || eh->needs_copy))) |
41bed6dd | 4346 | { |
9a926d55 L |
4347 | /* Symbol doesn't need copy reloc and isn't referenced |
4348 | locally. We only allow branch to symbol with | |
4349 | non-default visibility. */ | |
41bed6dd L |
4350 | fail = (!branch |
4351 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
4352 | } | |
4353 | ||
4354 | if (fail) | |
aab921ad | 4355 | return elf_x86_64_need_pic (info, input_bfd, input_section, |
338c190a | 4356 | h, NULL, NULL, howto); |
6610a52d L |
4357 | } |
4358 | /* Fall through. */ | |
4359 | ||
70256ad8 AJ |
4360 | case R_X86_64_8: |
4361 | case R_X86_64_16: | |
4362 | case R_X86_64_32: | |
d6ab8113 | 4363 | case R_X86_64_PC64: |
6b3db546 | 4364 | case R_X86_64_64: |
80643fbc | 4365 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 4366 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 4367 | |
1788fc08 | 4368 | direct: |
b1e24c02 | 4369 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
4370 | break; |
4371 | ||
9a926d55 | 4372 | /* Don't copy a pc-relative relocation into the output file |
6333bc0d | 4373 | if the symbol needs copy reloc or the symbol is undefined |
04ebc307 | 4374 | when building executable. Copy dynamic function pointer |
aec6b87e L |
4375 | relocations. Don't generate dynamic relocations against |
4376 | resolved undefined weak symbols in PIE. */ | |
0e1862bb | 4377 | if ((bfd_link_pic (info) |
aec6b87e | 4378 | && !(bfd_link_pie (info) |
fd9edc90 | 4379 | && h != NULL |
6333bc0d L |
4380 | && (h->needs_copy |
4381 | || eh->needs_copy | |
4382 | || h->root.type == bfd_link_hash_undefined) | |
d8457a04 L |
4383 | && (IS_X86_64_PCREL_TYPE (r_type) |
4384 | || r_type == R_X86_64_SIZE32 | |
4385 | || r_type == R_X86_64_SIZE64)) | |
4bc6e03a | 4386 | && (h == NULL |
aec6b87e L |
4387 | || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
4388 | && !resolved_to_zero) | |
4389 | || h->root.type != bfd_link_hash_undefweak)) | |
1788fc08 L |
4390 | && ((! IS_X86_64_PCREL_TYPE (r_type) |
4391 | && r_type != R_X86_64_SIZE32 | |
4392 | && r_type != R_X86_64_SIZE64) | |
d8045f23 | 4393 | || ! SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c | 4394 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 4395 | && !bfd_link_pic (info) |
c434dee6 AJ |
4396 | && h != NULL |
4397 | && h->dynindx != -1 | |
aec6b87e L |
4398 | && (!h->non_got_ref |
4399 | || eh->func_pointer_refcount > 0 | |
4400 | || (h->root.type == bfd_link_hash_undefweak | |
4401 | && !resolved_to_zero)) | |
bae420ef L |
4402 | && ((h->def_dynamic && !h->def_regular) |
4403 | /* Undefined weak symbol is bound locally when | |
4404 | PIC is false. */ | |
0f88be7a | 4405 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
4406 | { |
4407 | Elf_Internal_Rela outrel; | |
b34976b6 | 4408 | bfd_boolean skip, relocate; |
c434dee6 | 4409 | asection *sreloc; |
70256ad8 AJ |
4410 | |
4411 | /* When generating a shared object, these relocations | |
4412 | are copied into the output file to be resolved at run | |
407443a3 | 4413 | time. */ |
b34976b6 AM |
4414 | skip = FALSE; |
4415 | relocate = FALSE; | |
70256ad8 | 4416 | |
c629eae0 JJ |
4417 | outrel.r_offset = |
4418 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 4419 | rel->r_offset); |
c629eae0 | 4420 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 4421 | skip = TRUE; |
0fb19cbc | 4422 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 4423 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
4424 | |
4425 | outrel.r_offset += (input_section->output_section->vma | |
4426 | + input_section->output_offset); | |
4427 | ||
4428 | if (skip) | |
0bb2d96a | 4429 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 4430 | |
fd8ab9e5 AJ |
4431 | /* h->dynindx may be -1 if this symbol was marked to |
4432 | become local. */ | |
4433 | else if (h != NULL | |
c434dee6 | 4434 | && h->dynindx != -1 |
d8045f23 | 4435 | && (IS_X86_64_PCREL_TYPE (r_type) |
4e0c91e4 L |
4436 | || !(bfd_link_executable (info) |
4437 | || SYMBOLIC_BIND (info, h)) | |
d8045f23 | 4438 | || ! h->def_regular)) |
70256ad8 | 4439 | { |
351f65ca | 4440 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 4441 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
4442 | } |
4443 | else | |
4444 | { | |
4c10bbaa L |
4445 | /* This symbol is local, or marked to become local. |
4446 | When relocation overflow check is disabled, we | |
4447 | convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
4448 | if (r_type == htab->pointer_r_type | |
4449 | || (r_type == R_X86_64_32 | |
4450 | && info->no_reloc_overflow_check)) | |
607c0e09 | 4451 | { |
b34976b6 | 4452 | relocate = TRUE; |
351f65ca | 4453 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
4454 | outrel.r_addend = relocation + rel->r_addend; |
4455 | } | |
64d25c44 L |
4456 | else if (r_type == R_X86_64_64 |
4457 | && !ABI_64_P (output_bfd)) | |
4458 | { | |
4459 | relocate = TRUE; | |
4460 | outrel.r_info = htab->r_info (0, | |
4461 | R_X86_64_RELATIVE64); | |
4462 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
4463 | /* Check addend overflow. */ |
4464 | if ((outrel.r_addend & 0x80000000) | |
4465 | != (rel->r_addend & 0x80000000)) | |
4466 | { | |
4467 | const char *name; | |
268a8d3a | 4468 | int addend = rel->r_addend; |
8cf0d2dd L |
4469 | if (h && h->root.root.string) |
4470 | name = h->root.root.string; | |
4471 | else | |
4472 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
4473 | sym, NULL); | |
d42c267e AM |
4474 | _bfd_error_handler |
4475 | /* xgettext:c-format */ | |
4476 | (_("%B: addend %s%#x in relocation %s against " | |
4477 | "symbol `%s' at %#Lx in section `%A' is " | |
4478 | "out of range"), | |
4479 | input_bfd, addend < 0 ? "-" : "", addend, | |
4480 | howto->name, name, rel->r_offset, input_section); | |
8cf0d2dd L |
4481 | bfd_set_error (bfd_error_bad_value); |
4482 | return FALSE; | |
4483 | } | |
64d25c44 | 4484 | } |
607c0e09 AS |
4485 | else |
4486 | { | |
4487 | long sindx; | |
4488 | ||
8517fae7 | 4489 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
4490 | sindx = 0; |
4491 | else if (sec == NULL || sec->owner == NULL) | |
4492 | { | |
4493 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 4494 | return FALSE; |
607c0e09 AS |
4495 | } |
4496 | else | |
4497 | { | |
4498 | asection *osec; | |
4499 | ||
74541ad4 AM |
4500 | /* We are turning this relocation into one |
4501 | against a section symbol. It would be | |
4502 | proper to subtract the symbol's value, | |
4503 | osec->vma, from the emitted reloc addend, | |
4504 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
4505 | osec = sec->output_section; |
4506 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
4507 | if (sindx == 0) |
4508 | { | |
4509 | asection *oi = htab->elf.text_index_section; | |
4510 | sindx = elf_section_data (oi)->dynindx; | |
4511 | } | |
4512 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
4513 | } |
4514 | ||
351f65ca | 4515 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
4516 | outrel.r_addend = relocation + rel->r_addend; |
4517 | } | |
70256ad8 AJ |
4518 | } |
4519 | ||
cbe950e9 | 4520 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 4521 | |
62d78908 L |
4522 | if (sreloc == NULL || sreloc->contents == NULL) |
4523 | { | |
4524 | r = bfd_reloc_notsupported; | |
4525 | goto check_relocation_error; | |
4526 | } | |
c434dee6 | 4527 | |
351f65ca | 4528 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
4529 | |
4530 | /* If this reloc is against an external symbol, we do | |
4531 | not want to fiddle with the addend. Otherwise, we | |
4532 | need to include the symbol value so that it becomes | |
4533 | an addend for the dynamic reloc. */ | |
0f88be7a | 4534 | if (! relocate) |
70256ad8 AJ |
4535 | continue; |
4536 | } | |
4537 | ||
4538 | break; | |
4539 | ||
bffbf940 | 4540 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
4541 | case R_X86_64_GOTPC32_TLSDESC: |
4542 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 4543 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
4544 | tls_type = GOT_UNKNOWN; |
4545 | if (h == NULL && local_got_offsets) | |
0afcef53 | 4546 | tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 4547 | else if (h != NULL) |
0afcef53 | 4548 | tls_type = elf_x86_hash_entry (h)->tls_type; |
142411ca | 4549 | |
351f65ca L |
4550 | if (! elf_x86_64_tls_transition (info, input_bfd, |
4551 | input_section, contents, | |
4552 | symtab_hdr, sym_hashes, | |
4553 | &r_type, tls_type, rel, | |
bedfd056 | 4554 | relend, h, r_symndx, TRUE)) |
534a31f6 | 4555 | return FALSE; |
bffbf940 JJ |
4556 | |
4557 | if (r_type == R_X86_64_TPOFF32) | |
4558 | { | |
142411ca L |
4559 | bfd_vma roff = rel->r_offset; |
4560 | ||
bffbf940 | 4561 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 4562 | |
351f65ca | 4563 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 4564 | { |
52bc799a | 4565 | /* GD->LE transition. For 64bit, change |
e2cbcd91 L |
4566 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
4567 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
4568 | or | |
4569 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
4570 | .byte 0x66; rex64 | |
4571 | call *__tls_get_addr@GOTPCREL(%rip) | |
4572 | which may be converted to | |
4573 | addr32 call __tls_get_addr | |
52bc799a | 4574 | into: |
e2cbcd91 L |
4575 | movq %fs:0, %rax |
4576 | leaq foo@tpoff(%rax), %rax | |
52bc799a | 4577 | For 32bit, change |
e2cbcd91 L |
4578 | leaq foo@tlsgd(%rip), %rdi |
4579 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
4580 | or | |
4581 | leaq foo@tlsgd(%rip), %rdi | |
4582 | .byte 0x66; rex64 | |
4583 | call *__tls_get_addr@GOTPCREL(%rip) | |
4584 | which may be converted to | |
4585 | addr32 call __tls_get_addr | |
52bc799a | 4586 | into: |
e2cbcd91 L |
4587 | movl %fs:0, %eax |
4588 | leaq foo@tpoff(%rax), %rax | |
5c98a14e | 4589 | For largepic, change: |
e2cbcd91 L |
4590 | leaq foo@tlsgd(%rip), %rdi |
4591 | movabsq $__tls_get_addr@pltoff, %rax | |
4592 | addq %r15, %rax | |
4593 | call *%rax | |
5c98a14e | 4594 | into: |
e2cbcd91 L |
4595 | movq %fs:0, %rax |
4596 | leaq foo@tpoff(%rax), %rax | |
4597 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 4598 | int largepic = 0; |
e2cbcd91 | 4599 | if (ABI_64_P (output_bfd)) |
5c98a14e | 4600 | { |
e2cbcd91 L |
4601 | if (contents[roff + 5] == 0xb8) |
4602 | { | |
4603 | memcpy (contents + roff - 3, | |
4604 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
4605 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
4606 | largepic = 1; | |
4607 | } | |
4608 | else | |
4609 | memcpy (contents + roff - 4, | |
4610 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
4611 | 16); | |
5c98a14e | 4612 | } |
52bc799a L |
4613 | else |
4614 | memcpy (contents + roff - 3, | |
4615 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
4616 | 15); | |
eb4ff4d6 | 4617 | bfd_put_32 (output_bfd, |
351f65ca | 4618 | elf_x86_64_tpoff (info, relocation), |
5c98a14e | 4619 | contents + roff + 8 + largepic); |
e2cbcd91 L |
4620 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, |
4621 | R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */ | |
bffbf940 | 4622 | rel++; |
60f2e42e | 4623 | wrel++; |
bffbf940 JJ |
4624 | continue; |
4625 | } | |
351f65ca | 4626 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
4627 | { |
4628 | /* GDesc -> LE transition. | |
4629 | It's originally something like: | |
4630 | leaq x@tlsdesc(%rip), %rax | |
4631 | ||
4632 | Change it to: | |
c9736ba0 | 4633 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 4634 | |
c9736ba0 | 4635 | unsigned int val, type; |
67a4f2b7 | 4636 | |
67a4f2b7 | 4637 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 4638 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
4639 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
4640 | contents + roff - 3); | |
4641 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
4642 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4643 | contents + roff - 1); | |
eb4ff4d6 | 4644 | bfd_put_32 (output_bfd, |
351f65ca | 4645 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
4646 | contents + roff); |
4647 | continue; | |
4648 | } | |
351f65ca | 4649 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
4650 | { |
4651 | /* GDesc -> LE transition. | |
4652 | It's originally: | |
4653 | call *(%rax) | |
4654 | Turn it into: | |
142411ca | 4655 | xchg %ax,%ax. */ |
10efb593 | 4656 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
4657 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4658 | continue; | |
4659 | } | |
351f65ca | 4660 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 4661 | { |
bffbf940 | 4662 | /* IE->LE transition: |
cf61b747 | 4663 | For 64bit, originally it can be one of: |
bffbf940 JJ |
4664 | movq foo@gottpoff(%rip), %reg |
4665 | addq foo@gottpoff(%rip), %reg | |
4666 | We change it into: | |
4667 | movq $foo, %reg | |
4668 | leaq foo(%reg), %reg | |
cf61b747 L |
4669 | addq $foo, %reg. |
4670 | For 32bit, originally it can be one of: | |
4671 | movq foo@gottpoff(%rip), %reg | |
4672 | addl foo@gottpoff(%rip), %reg | |
4673 | We change it into: | |
4674 | movq $foo, %reg | |
4675 | leal foo(%reg), %reg | |
4676 | addl $foo, %reg. */ | |
142411ca L |
4677 | |
4678 | unsigned int val, type, reg; | |
4679 | ||
cf61b747 L |
4680 | if (roff >= 3) |
4681 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
4682 | else | |
4683 | val = 0; | |
142411ca L |
4684 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
4685 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 4686 | reg >>= 3; |
bffbf940 JJ |
4687 | if (type == 0x8b) |
4688 | { | |
4689 | /* movq */ | |
4690 | if (val == 0x4c) | |
4691 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 4692 | contents + roff - 3); |
4a4c5f25 L |
4693 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4694 | bfd_put_8 (output_bfd, 0x41, | |
4695 | contents + roff - 3); | |
bffbf940 | 4696 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 4697 | contents + roff - 2); |
bffbf940 | 4698 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 4699 | contents + roff - 1); |
bffbf940 JJ |
4700 | } |
4701 | else if (reg == 4) | |
4702 | { | |
cf61b747 L |
4703 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
4704 | is special */ | |
bffbf940 JJ |
4705 | if (val == 0x4c) |
4706 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 4707 | contents + roff - 3); |
4a4c5f25 L |
4708 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4709 | bfd_put_8 (output_bfd, 0x41, | |
4710 | contents + roff - 3); | |
bffbf940 | 4711 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 4712 | contents + roff - 2); |
bffbf940 | 4713 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 4714 | contents + roff - 1); |
bffbf940 JJ |
4715 | } |
4716 | else | |
4717 | { | |
cf61b747 | 4718 | /* addq/addl -> leaq/leal */ |
bffbf940 JJ |
4719 | if (val == 0x4c) |
4720 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 4721 | contents + roff - 3); |
4a4c5f25 L |
4722 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4723 | bfd_put_8 (output_bfd, 0x45, | |
4724 | contents + roff - 3); | |
bffbf940 | 4725 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 4726 | contents + roff - 2); |
bffbf940 | 4727 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 4728 | contents + roff - 1); |
bffbf940 | 4729 | } |
eb4ff4d6 | 4730 | bfd_put_32 (output_bfd, |
351f65ca | 4731 | elf_x86_64_tpoff (info, relocation), |
142411ca | 4732 | contents + roff); |
bffbf940 JJ |
4733 | continue; |
4734 | } | |
142411ca L |
4735 | else |
4736 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
4737 | } |
4738 | ||
6de2ae4a | 4739 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
4740 | abort (); |
4741 | ||
4742 | if (h != NULL) | |
67a4f2b7 AO |
4743 | { |
4744 | off = h->got.offset; | |
0afcef53 | 4745 | offplt = elf_x86_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 4746 | } |
bffbf940 JJ |
4747 | else |
4748 | { | |
4749 | if (local_got_offsets == NULL) | |
4750 | abort (); | |
4751 | ||
4752 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 4753 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
4754 | } |
4755 | ||
4756 | if ((off & 1) != 0) | |
4757 | off &= ~1; | |
26e41594 | 4758 | else |
bffbf940 JJ |
4759 | { |
4760 | Elf_Internal_Rela outrel; | |
bffbf940 | 4761 | int dr_type, indx; |
67a4f2b7 | 4762 | asection *sreloc; |
bffbf940 | 4763 | |
6de2ae4a | 4764 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
4765 | abort (); |
4766 | ||
67a4f2b7 AO |
4767 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4768 | ||
4769 | if (GOT_TLS_GDESC_P (tls_type)) | |
4770 | { | |
351f65ca | 4771 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 4772 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
4773 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
4774 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4775 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4776 | + offplt |
4777 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4778 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4779 | if (indx == 0) |
0afcef53 | 4780 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
67a4f2b7 AO |
4781 | else |
4782 | outrel.r_addend = 0; | |
351f65ca | 4783 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
4784 | } |
4785 | ||
6de2ae4a | 4786 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4787 | |
6de2ae4a L |
4788 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4789 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 4790 | |
67a4f2b7 | 4791 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 4792 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
4793 | else if (GOT_TLS_GDESC_P (tls_type)) |
4794 | goto dr_done; | |
bffbf940 JJ |
4795 | else |
4796 | dr_type = R_X86_64_TPOFF64; | |
4797 | ||
6de2ae4a | 4798 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 4799 | outrel.r_addend = 0; |
67a4f2b7 AO |
4800 | if ((dr_type == R_X86_64_TPOFF64 |
4801 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
0afcef53 | 4802 | outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info); |
351f65ca | 4803 | outrel.r_info = htab->r_info (indx, dr_type); |
bffbf940 | 4804 | |
351f65ca | 4805 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 4806 | |
67a4f2b7 | 4807 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
4808 | { |
4809 | if (indx == 0) | |
4810 | { | |
d40d037c | 4811 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 4812 | bfd_put_64 (output_bfd, |
0afcef53 | 4813 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 4814 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
4815 | } |
4816 | else | |
4817 | { | |
4818 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 4819 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 4820 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
4821 | R_X86_64_DTPOFF64); |
4822 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 4823 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 4824 | &outrel); |
bffbf940 JJ |
4825 | } |
4826 | } | |
4827 | ||
67a4f2b7 | 4828 | dr_done: |
bffbf940 JJ |
4829 | if (h != NULL) |
4830 | h->got.offset |= 1; | |
4831 | else | |
4832 | local_got_offsets[r_symndx] |= 1; | |
4833 | } | |
4834 | ||
67a4f2b7 AO |
4835 | if (off >= (bfd_vma) -2 |
4836 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 4837 | abort (); |
351f65ca | 4838 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 4839 | { |
67a4f2b7 AO |
4840 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
4841 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
4842 | relocation = htab->elf.sgotplt->output_section->vma |
4843 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4844 | + offplt + htab->sgotplt_jump_table_size; |
4845 | else | |
6de2ae4a L |
4846 | relocation = htab->elf.sgot->output_section->vma |
4847 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 4848 | unresolved_reloc = FALSE; |
bffbf940 | 4849 | } |
142411ca | 4850 | else |
67a4f2b7 | 4851 | { |
142411ca | 4852 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 4853 | |
351f65ca | 4854 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 4855 | { |
52bc799a | 4856 | /* GD->IE transition. For 64bit, change |
e2cbcd91 L |
4857 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
4858 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
4859 | or | |
4860 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
4861 | .byte 0x66; rex64 | |
4862 | call *__tls_get_addr@GOTPCREL(%rip | |
4863 | which may be converted to | |
4864 | addr32 call __tls_get_addr | |
52bc799a | 4865 | into: |
e2cbcd91 L |
4866 | movq %fs:0, %rax |
4867 | addq foo@gottpoff(%rip), %rax | |
52bc799a | 4868 | For 32bit, change |
e2cbcd91 L |
4869 | leaq foo@tlsgd(%rip), %rdi |
4870 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
4871 | or | |
4872 | leaq foo@tlsgd(%rip), %rdi | |
4873 | .byte 0x66; rex64; | |
4874 | call *__tls_get_addr@GOTPCREL(%rip) | |
4875 | which may be converted to | |
4876 | addr32 call __tls_get_addr | |
52bc799a | 4877 | into: |
e2cbcd91 L |
4878 | movl %fs:0, %eax |
4879 | addq foo@gottpoff(%rip), %rax | |
5c98a14e | 4880 | For largepic, change: |
e2cbcd91 L |
4881 | leaq foo@tlsgd(%rip), %rdi |
4882 | movabsq $__tls_get_addr@pltoff, %rax | |
4883 | addq %r15, %rax | |
4884 | call *%rax | |
5c98a14e | 4885 | into: |
e2cbcd91 L |
4886 | movq %fs:0, %rax |
4887 | addq foo@gottpoff(%rax), %rax | |
4888 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 4889 | int largepic = 0; |
e2cbcd91 | 4890 | if (ABI_64_P (output_bfd)) |
5c98a14e | 4891 | { |
e2cbcd91 L |
4892 | if (contents[roff + 5] == 0xb8) |
4893 | { | |
4894 | memcpy (contents + roff - 3, | |
4895 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
4896 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
4897 | largepic = 1; | |
4898 | } | |
4899 | else | |
4900 | memcpy (contents + roff - 4, | |
4901 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
4902 | 16); | |
5c98a14e | 4903 | } |
52bc799a L |
4904 | else |
4905 | memcpy (contents + roff - 3, | |
4906 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
4907 | 15); | |
142411ca | 4908 | |
6de2ae4a L |
4909 | relocation = (htab->elf.sgot->output_section->vma |
4910 | + htab->elf.sgot->output_offset + off | |
142411ca | 4911 | - roff |
5c98a14e | 4912 | - largepic |
142411ca L |
4913 | - input_section->output_section->vma |
4914 | - input_section->output_offset | |
4915 | - 12); | |
4916 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
4917 | contents + roff + 8 + largepic); |
4918 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 4919 | rel++; |
60f2e42e | 4920 | wrel++; |
142411ca L |
4921 | continue; |
4922 | } | |
351f65ca | 4923 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
4924 | { |
4925 | /* GDesc -> IE transition. | |
4926 | It's originally something like: | |
4927 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 4928 | |
142411ca | 4929 | Change it to: |
c9736ba0 | 4930 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 4931 | |
142411ca L |
4932 | /* Now modify the instruction as appropriate. To |
4933 | turn a leaq into a movq in the form we use it, it | |
4934 | suffices to change the second byte from 0x8d to | |
4935 | 0x8b. */ | |
4936 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
4937 | ||
4938 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4939 | htab->elf.sgot->output_section->vma |
4940 | + htab->elf.sgot->output_offset + off | |
142411ca L |
4941 | - rel->r_offset |
4942 | - input_section->output_section->vma | |
4943 | - input_section->output_offset | |
4944 | - 4, | |
4945 | contents + roff); | |
4946 | continue; | |
4947 | } | |
351f65ca | 4948 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
4949 | { |
4950 | /* GDesc -> IE transition. | |
4951 | It's originally: | |
4952 | call *(%rax) | |
4953 | ||
4954 | Change it to: | |
c9736ba0 | 4955 | xchg %ax, %ax. */ |
142411ca | 4956 | |
142411ca L |
4957 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
4958 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
4959 | continue; | |
4960 | } | |
4961 | else | |
4962 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 4963 | } |
bffbf940 JJ |
4964 | break; |
4965 | ||
4966 | case R_X86_64_TLSLD: | |
351f65ca L |
4967 | if (! elf_x86_64_tls_transition (info, input_bfd, |
4968 | input_section, contents, | |
4969 | symtab_hdr, sym_hashes, | |
bedfd056 L |
4970 | &r_type, GOT_UNKNOWN, rel, |
4971 | relend, h, r_symndx, TRUE)) | |
142411ca | 4972 | return FALSE; |
a3fadc9a | 4973 | |
142411ca L |
4974 | if (r_type != R_X86_64_TLSLD) |
4975 | { | |
bffbf940 | 4976 | /* LD->LE transition: |
e2cbcd91 L |
4977 | leaq foo@tlsld(%rip), %rdi |
4978 | call __tls_get_addr@PLT | |
4979 | For 64bit, we change it into: | |
4980 | .word 0x6666; .byte 0x66; movq %fs:0, %rax | |
4981 | For 32bit, we change it into: | |
4982 | nopl 0x0(%rax); movl %fs:0, %eax | |
4983 | Or | |
4984 | leaq foo@tlsld(%rip), %rdi; | |
4985 | call *__tls_get_addr@GOTPCREL(%rip) | |
4986 | which may be converted to | |
4987 | addr32 call __tls_get_addr | |
52bc799a | 4988 | For 64bit, we change it into: |
e2cbcd91 | 4989 | .word 0x6666; .word 0x6666; movq %fs:0, %rax |
52bc799a | 4990 | For 32bit, we change it into: |
e2cbcd91 | 4991 | nopw 0x0(%rax); movl %fs:0, %eax |
5c98a14e | 4992 | For largepic, change: |
e2cbcd91 L |
4993 | leaq foo@tlsgd(%rip), %rdi |
4994 | movabsq $__tls_get_addr@pltoff, %rax | |
4995 | addq %rbx, %rax | |
4996 | call *%rax | |
4997 | into | |
4998 | data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
4999 | movq %fs:0, %eax */ | |
142411ca L |
5000 | |
5001 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
e2cbcd91 L |
5002 | if (ABI_64_P (output_bfd)) |
5003 | { | |
5004 | if (contents[rel->r_offset + 5] == 0xb8) | |
5005 | memcpy (contents + rel->r_offset - 3, | |
5006 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
5007 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
5008 | else if (contents[rel->r_offset + 4] == 0xff | |
5009 | || contents[rel->r_offset + 4] == 0x67) | |
5010 | memcpy (contents + rel->r_offset - 3, | |
5011 | "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", | |
5012 | 13); | |
5013 | else | |
5014 | memcpy (contents + rel->r_offset - 3, | |
5015 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
5016 | } | |
52bc799a | 5017 | else |
e2cbcd91 L |
5018 | { |
5019 | if (contents[rel->r_offset + 4] == 0xff) | |
5020 | memcpy (contents + rel->r_offset - 3, | |
5021 | "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", | |
5022 | 13); | |
5023 | else | |
5024 | memcpy (contents + rel->r_offset - 3, | |
5025 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
5026 | } | |
5027 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX | |
5028 | and R_X86_64_PLTOFF64. */ | |
bffbf940 | 5029 | rel++; |
60f2e42e | 5030 | wrel++; |
bffbf940 JJ |
5031 | continue; |
5032 | } | |
5033 | ||
6de2ae4a | 5034 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
5035 | abort (); |
5036 | ||
0afcef53 | 5037 | off = htab->tls_ld_or_ldm_got.offset; |
bffbf940 JJ |
5038 | if (off & 1) |
5039 | off &= ~1; | |
5040 | else | |
5041 | { | |
5042 | Elf_Internal_Rela outrel; | |
bffbf940 | 5043 | |
6de2ae4a | 5044 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
5045 | abort (); |
5046 | ||
6de2ae4a L |
5047 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5048 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
5049 | |
5050 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5051 | htab->elf.sgot->contents + off); |
bffbf940 | 5052 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 5053 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5054 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 5055 | outrel.r_addend = 0; |
351f65ca | 5056 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 5057 | &outrel); |
0afcef53 | 5058 | htab->tls_ld_or_ldm_got.offset |= 1; |
bffbf940 | 5059 | } |
6de2ae4a L |
5060 | relocation = htab->elf.sgot->output_section->vma |
5061 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5062 | unresolved_reloc = FALSE; |
bffbf940 JJ |
5063 | break; |
5064 | ||
5065 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
5066 | if (!bfd_link_executable (info) |
5067 | || (input_section->flags & SEC_CODE) == 0) | |
0afcef53 | 5068 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
bffbf940 | 5069 | else |
351f65ca | 5070 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5071 | break; |
5072 | ||
5073 | case R_X86_64_TPOFF32: | |
6769d501 | 5074 | case R_X86_64_TPOFF64: |
0e1862bb | 5075 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 5076 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5077 | break; |
5078 | ||
a69ed7f7 L |
5079 | case R_X86_64_DTPOFF64: |
5080 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
0afcef53 | 5081 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
a69ed7f7 L |
5082 | break; |
5083 | ||
70256ad8 AJ |
5084 | default: |
5085 | break; | |
5086 | } | |
8d88c4ca | 5087 | |
239e1f3a AM |
5088 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
5089 | because such sections are not SEC_ALLOC and thus ld.so will | |
5090 | not process them. */ | |
c434dee6 | 5091 | if (unresolved_reloc |
239e1f3a | 5092 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
5093 | && h->def_dynamic) |
5094 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
5095 | rel->r_offset) != (bfd_vma) -1) | |
a040981f | 5096 | { |
7073b5b9 L |
5097 | switch (r_type) |
5098 | { | |
5099 | case R_X86_64_32S: | |
a5b4ee94 L |
5100 | sec = h->root.u.def.section; |
5101 | if ((info->nocopyreloc | |
5102 | || (eh->def_protected | |
5103 | && elf_has_no_copy_on_protected (h->root.u.def.section->owner))) | |
7073b5b9 L |
5104 | && !(h->root.u.def.section->flags & SEC_CODE)) |
5105 | return elf_x86_64_need_pic (info, input_bfd, input_section, | |
5106 | h, NULL, NULL, howto); | |
5107 | /* Fall through. */ | |
5108 | ||
5109 | default: | |
5110 | _bfd_error_handler | |
5111 | /* xgettext:c-format */ | |
5112 | (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"), | |
5113 | input_bfd, | |
5114 | input_section, | |
5115 | rel->r_offset, | |
5116 | howto->name, | |
5117 | h->root.root.string); | |
5118 | return FALSE; | |
5119 | } | |
a040981f | 5120 | } |
c434dee6 | 5121 | |
cbe950e9 | 5122 | do_relocation: |
8d88c4ca | 5123 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
5124 | contents, rel->r_offset, |
5125 | relocation, rel->r_addend); | |
8d88c4ca | 5126 | |
62d78908 | 5127 | check_relocation_error: |
8d88c4ca | 5128 | if (r != bfd_reloc_ok) |
8da6118f | 5129 | { |
c434dee6 AJ |
5130 | const char *name; |
5131 | ||
5132 | if (h != NULL) | |
5133 | name = h->root.root.string; | |
5134 | else | |
8da6118f | 5135 | { |
c434dee6 AJ |
5136 | name = bfd_elf_string_from_elf_section (input_bfd, |
5137 | symtab_hdr->sh_link, | |
5138 | sym->st_name); | |
5139 | if (name == NULL) | |
b34976b6 | 5140 | return FALSE; |
c434dee6 AJ |
5141 | if (*name == '\0') |
5142 | name = bfd_section_name (input_bfd, sec); | |
5143 | } | |
5144 | ||
5145 | if (r == bfd_reloc_overflow) | |
1a72702b AM |
5146 | (*info->callbacks->reloc_overflow) |
5147 | (info, (h ? &h->root : NULL), name, howto->name, | |
5148 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
c434dee6 AJ |
5149 | else |
5150 | { | |
4eca0228 | 5151 | _bfd_error_handler |
695344c0 | 5152 | /* xgettext:c-format */ |
d42c267e | 5153 | (_("%B(%A+%#Lx): reloc against `%s': error %d"), |
d003868e | 5154 | input_bfd, input_section, |
d42c267e | 5155 | rel->r_offset, name, (int) r); |
b34976b6 | 5156 | return FALSE; |
8da6118f KH |
5157 | } |
5158 | } | |
60f2e42e L |
5159 | |
5160 | if (wrel != rel) | |
5161 | *wrel = *rel; | |
5162 | } | |
5163 | ||
5164 | if (wrel != rel) | |
5165 | { | |
5166 | Elf_Internal_Shdr *rel_hdr; | |
5167 | size_t deleted = rel - wrel; | |
5168 | ||
5169 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
5170 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5171 | if (rel_hdr->sh_size == 0) | |
5172 | { | |
5173 | /* It is too late to remove an empty reloc section. Leave | |
5174 | one NONE reloc. | |
5175 | ??? What is wrong with an empty section??? */ | |
5176 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
5177 | deleted -= 1; | |
5178 | } | |
5179 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
5180 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5181 | input_section->reloc_count -= deleted; | |
8d88c4ca | 5182 | } |
70256ad8 | 5183 | |
b34976b6 | 5184 | return TRUE; |
70256ad8 AJ |
5185 | } |
5186 | ||
5187 | /* Finish up dynamic symbol handling. We set the contents of various | |
5188 | dynamic sections here. */ | |
5189 | ||
b34976b6 | 5190 | static bfd_boolean |
351f65ca L |
5191 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
5192 | struct bfd_link_info *info, | |
5193 | struct elf_link_hash_entry *h, | |
aec6b87e | 5194 | Elf_Internal_Sym *sym) |
70256ad8 | 5195 | { |
0afcef53 | 5196 | struct elf_x86_link_hash_table *htab; |
f2c29a16 | 5197 | bfd_boolean use_plt_second; |
0afcef53 | 5198 | struct elf_x86_link_hash_entry *eh; |
aec6b87e | 5199 | bfd_boolean local_undefweak; |
70256ad8 | 5200 | |
0afcef53 | 5201 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
5202 | if (htab == NULL) |
5203 | return FALSE; | |
70256ad8 | 5204 | |
f2c29a16 L |
5205 | /* Use the second PLT section only if there is .plt section. */ |
5206 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
0ff2b86e | 5207 | |
0afcef53 | 5208 | eh = (struct elf_x86_link_hash_entry *) h; |
9e9821dd L |
5209 | if (eh->no_finish_dynamic_symbol) |
5210 | abort (); | |
dd7e64d4 | 5211 | |
aec6b87e L |
5212 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
5213 | resolved undefined weak symbols in executable so that their | |
5214 | references have value 0 at run-time. */ | |
e62b9723 | 5215 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
0afcef53 | 5216 | X86_64_ELF_DATA, |
e62b9723 L |
5217 | eh->has_got_reloc, |
5218 | eh); | |
aec6b87e | 5219 | |
70256ad8 AJ |
5220 | if (h->plt.offset != (bfd_vma) -1) |
5221 | { | |
70256ad8 | 5222 | bfd_vma plt_index; |
38b12349 | 5223 | bfd_vma got_offset, plt_offset; |
70256ad8 | 5224 | Elf_Internal_Rela rela; |
947216bf | 5225 | bfd_byte *loc; |
0ff2b86e | 5226 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 5227 | const struct elf_backend_data *bed; |
5974eba6 | 5228 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
5229 | |
5230 | /* When building a static executable, use .iplt, .igot.plt and | |
5231 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 5232 | if (htab->elf.splt != NULL) |
cbe950e9 | 5233 | { |
6de2ae4a L |
5234 | plt = htab->elf.splt; |
5235 | gotplt = htab->elf.sgotplt; | |
5236 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
5237 | } |
5238 | else | |
5239 | { | |
6de2ae4a L |
5240 | plt = htab->elf.iplt; |
5241 | gotplt = htab->elf.igotplt; | |
5242 | relplt = htab->elf.irelplt; | |
cbe950e9 | 5243 | } |
70256ad8 AJ |
5244 | |
5245 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 5246 | it up. */ |
cbe950e9 | 5247 | if ((h->dynindx == -1 |
aec6b87e | 5248 | && !local_undefweak |
0e1862bb | 5249 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
5250 | && h->def_regular |
5251 | && h->type == STT_GNU_IFUNC)) | |
5252 | || plt == NULL | |
5253 | || gotplt == NULL | |
5254 | || relplt == NULL) | |
cec7f46a | 5255 | abort (); |
70256ad8 AJ |
5256 | |
5257 | /* Get the index in the procedure linkage table which | |
5258 | corresponds to this symbol. This is the index of this symbol | |
5259 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 5260 | first entry in the procedure linkage table is reserved. |
6bbec505 | 5261 | |
cbe950e9 | 5262 | Get the offset into the .got table of the entry that |
407443a3 | 5263 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
5264 | bytes. The first three are reserved for the dynamic linker. |
5265 | ||
5266 | For static executables, we don't reserve anything. */ | |
5267 | ||
6de2ae4a | 5268 | if (plt == htab->elf.splt) |
cbe950e9 | 5269 | { |
765e526c L |
5270 | got_offset = (h->plt.offset / htab->plt.plt_entry_size |
5271 | - htab->plt.has_plt0); | |
e1f98742 | 5272 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
5273 | } |
5274 | else | |
5275 | { | |
765e526c | 5276 | got_offset = h->plt.offset / htab->plt.plt_entry_size; |
e1f98742 | 5277 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 5278 | } |
70256ad8 | 5279 | |
38b12349 | 5280 | /* Fill in the entry in the procedure linkage table. */ |
765e526c L |
5281 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, |
5282 | htab->plt.plt_entry_size); | |
f2c29a16 | 5283 | if (use_plt_second) |
0ff2b86e | 5284 | { |
f2c29a16 | 5285 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
765e526c L |
5286 | htab->non_lazy_plt->plt_entry, |
5287 | htab->non_lazy_plt->plt_entry_size); | |
0ff2b86e | 5288 | |
f2c29a16 L |
5289 | resolved_plt = htab->plt_second; |
5290 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
5291 | } |
5292 | else | |
5293 | { | |
0ff2b86e L |
5294 | resolved_plt = plt; |
5295 | plt_offset = h->plt.offset; | |
5296 | } | |
eed180f8 RM |
5297 | |
5298 | /* Insert the relocation positions of the plt section. */ | |
5299 | ||
5300 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
5301 | subtracting the size of that instruction. */ | |
ab7fede8 L |
5302 | plt_got_pcrel_offset = (gotplt->output_section->vma |
5303 | + gotplt->output_offset | |
5304 | + got_offset | |
5305 | - resolved_plt->output_section->vma | |
5306 | - resolved_plt->output_offset | |
5307 | - plt_offset | |
765e526c | 5308 | - htab->plt.plt_got_insn_size); |
ab7fede8 L |
5309 | |
5310 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 5311 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
695344c0 | 5312 | /* xgettext:c-format */ |
ab7fede8 L |
5313 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"), |
5314 | output_bfd, h->root.root.string); | |
5315 | ||
5316 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
38b12349 | 5317 | (resolved_plt->contents + plt_offset |
765e526c | 5318 | + htab->plt.plt_got_offset)); |
cbe950e9 | 5319 | |
653165cc | 5320 | /* Fill in the entry in the global offset table, initially this |
aec6b87e L |
5321 | points to the second part of the PLT entry. Leave the entry |
5322 | as zero for undefined weak symbol in PIE. No PLT relocation | |
5323 | against undefined weak symbol in PIE. */ | |
5324 | if (!local_undefweak) | |
cbe950e9 | 5325 | { |
765e526c | 5326 | if (htab->plt.has_plt0) |
38b12349 L |
5327 | bfd_put_64 (output_bfd, (plt->output_section->vma |
5328 | + plt->output_offset | |
5329 | + h->plt.offset | |
765e526c | 5330 | + htab->lazy_plt->plt_lazy_offset), |
38b12349 | 5331 | gotplt->contents + got_offset); |
aec6b87e L |
5332 | |
5333 | /* Fill in the entry in the .rela.plt section. */ | |
5334 | rela.r_offset = (gotplt->output_section->vma | |
5335 | + gotplt->output_offset | |
5336 | + got_offset); | |
5337 | if (h->dynindx == -1 | |
5338 | || ((bfd_link_executable (info) | |
5339 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
5340 | && h->def_regular | |
5341 | && h->type == STT_GNU_IFUNC)) | |
5342 | { | |
6322e5c5 L |
5343 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
5344 | h->root.root.string, | |
5345 | h->root.u.def.section->owner); | |
5346 | ||
aec6b87e L |
5347 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
5348 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
5349 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); | |
5350 | rela.r_addend = (h->root.u.def.value | |
5351 | + h->root.u.def.section->output_section->vma | |
5352 | + h->root.u.def.section->output_offset); | |
5353 | /* R_X86_64_IRELATIVE comes last. */ | |
5354 | plt_index = htab->next_irelative_index--; | |
5355 | } | |
5356 | else | |
5357 | { | |
5358 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); | |
5359 | rela.r_addend = 0; | |
5360 | plt_index = htab->next_jump_slot_index++; | |
5361 | } | |
e1f98742 | 5362 | |
38b12349 L |
5363 | /* Don't fill the second and third slots in PLT entry for |
5364 | static executables nor without PLT0. */ | |
765e526c | 5365 | if (plt == htab->elf.splt && htab->plt.has_plt0) |
aec6b87e | 5366 | { |
38b12349 | 5367 | bfd_vma plt0_offset |
765e526c | 5368 | = h->plt.offset + htab->lazy_plt->plt_plt_insn_end; |
aec6b87e L |
5369 | |
5370 | /* Put relocation index. */ | |
5371 | bfd_put_32 (output_bfd, plt_index, | |
5372 | (plt->contents + h->plt.offset | |
765e526c | 5373 | + htab->lazy_plt->plt_reloc_offset)); |
aec6b87e L |
5374 | |
5375 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
5376 | check relocation index for overflow since branch displacement | |
5377 | will overflow first. */ | |
5378 | if (plt0_offset > 0x80000000) | |
695344c0 | 5379 | /* xgettext:c-format */ |
aec6b87e L |
5380 | info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"), |
5381 | output_bfd, h->root.root.string); | |
5382 | bfd_put_32 (output_bfd, - plt0_offset, | |
38b12349 | 5383 | (plt->contents + h->plt.offset |
765e526c | 5384 | + htab->lazy_plt->plt_plt_offset)); |
aec6b87e | 5385 | } |
351f65ca | 5386 | |
aec6b87e L |
5387 | bed = get_elf_backend_data (output_bfd); |
5388 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
5389 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
5390 | } | |
dd7e64d4 L |
5391 | } |
5392 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
5393 | { | |
38b12349 | 5394 | bfd_vma got_offset, plt_offset; |
dd7e64d4 L |
5395 | asection *plt, *got; |
5396 | bfd_boolean got_after_plt; | |
5397 | int32_t got_pcrel_offset; | |
dd7e64d4 L |
5398 | |
5399 | /* Set the entry in the GOT procedure linkage table. */ | |
5400 | plt = htab->plt_got; | |
5401 | got = htab->elf.sgot; | |
5402 | got_offset = h->got.offset; | |
5403 | ||
5404 | if (got_offset == (bfd_vma) -1 | |
e492d2f8 | 5405 | || (h->type == STT_GNU_IFUNC && h->def_regular) |
dd7e64d4 L |
5406 | || plt == NULL |
5407 | || got == NULL) | |
5408 | abort (); | |
70256ad8 | 5409 | |
38b12349 | 5410 | /* Use the non-lazy PLT entry template for the GOT PLT since they |
dd7e64d4 | 5411 | are the identical. */ |
dd7e64d4 L |
5412 | /* Fill in the entry in the GOT procedure linkage table. */ |
5413 | plt_offset = eh->plt_got.offset; | |
5414 | memcpy (plt->contents + plt_offset, | |
765e526c L |
5415 | htab->non_lazy_plt->plt_entry, |
5416 | htab->non_lazy_plt->plt_entry_size); | |
dd7e64d4 L |
5417 | |
5418 | /* Put offset the PC-relative instruction referring to the GOT | |
5419 | entry, subtracting the size of that instruction. */ | |
5420 | got_pcrel_offset = (got->output_section->vma | |
5421 | + got->output_offset | |
5422 | + got_offset | |
5423 | - plt->output_section->vma | |
5424 | - plt->output_offset | |
5425 | - plt_offset | |
765e526c | 5426 | - htab->non_lazy_plt->plt_got_insn_size); |
dd7e64d4 L |
5427 | |
5428 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
5429 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
5430 | if ((got_after_plt && got_pcrel_offset < 0) | |
5431 | || (!got_after_plt && got_pcrel_offset > 0)) | |
695344c0 | 5432 | /* xgettext:c-format */ |
dd7e64d4 L |
5433 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"), |
5434 | output_bfd, h->root.root.string); | |
5435 | ||
5436 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
38b12349 | 5437 | (plt->contents + plt_offset |
765e526c | 5438 | + htab->non_lazy_plt->plt_got_offset)); |
dd7e64d4 L |
5439 | } |
5440 | ||
aec6b87e L |
5441 | if (!local_undefweak |
5442 | && !h->def_regular | |
dd7e64d4 L |
5443 | && (h->plt.offset != (bfd_vma) -1 |
5444 | || eh->plt_got.offset != (bfd_vma) -1)) | |
5445 | { | |
5446 | /* Mark the symbol as undefined, rather than as defined in | |
5447 | the .plt section. Leave the value if there were any | |
5448 | relocations where pointer equality matters (this is a clue | |
5449 | for the dynamic linker, to make function pointer | |
5450 | comparisons work between an application and shared | |
5451 | library), otherwise set it to zero. If a function is only | |
5452 | called from a binary, there is no need to slow down | |
5453 | shared libraries because of that. */ | |
5454 | sym->st_shndx = SHN_UNDEF; | |
5455 | if (!h->pointer_equality_needed) | |
5456 | sym->st_value = 0; | |
70256ad8 AJ |
5457 | } |
5458 | ||
aec6b87e L |
5459 | /* Don't generate dynamic GOT relocation against undefined weak |
5460 | symbol in executable. */ | |
bffbf940 | 5461 | if (h->got.offset != (bfd_vma) -1 |
0afcef53 L |
5462 | && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h)->tls_type) |
5463 | && elf_x86_hash_entry (h)->tls_type != GOT_TLS_IE | |
aec6b87e | 5464 | && !local_undefweak) |
053579d7 | 5465 | { |
053579d7 | 5466 | Elf_Internal_Rela rela; |
233cc9c1 | 5467 | asection *relgot = htab->elf.srelgot; |
053579d7 AJ |
5468 | |
5469 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 5470 | up. */ |
6de2ae4a | 5471 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 5472 | abort (); |
053579d7 | 5473 | |
6de2ae4a L |
5474 | rela.r_offset = (htab->elf.sgot->output_section->vma |
5475 | + htab->elf.sgot->output_offset | |
dc810e39 | 5476 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
5477 | |
5478 | /* If this is a static link, or it is a -Bsymbolic link and the | |
5479 | symbol is defined locally or was forced to be local because | |
5480 | of a version file, we just want to emit a RELATIVE reloc. | |
5481 | The entry in the global offset table will already have been | |
5482 | initialized in the relocate_section function. */ | |
710ab287 | 5483 | if (h->def_regular |
0018b0a3 L |
5484 | && h->type == STT_GNU_IFUNC) |
5485 | { | |
233cc9c1 L |
5486 | if (h->plt.offset == (bfd_vma) -1) |
5487 | { | |
5488 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
5489 | if (htab->elf.splt == NULL) | |
5490 | { | |
5491 | /* use .rel[a].iplt section to store .got relocations | |
5492 | in static executable. */ | |
5493 | relgot = htab->elf.irelplt; | |
5494 | } | |
5495 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
5496 | { | |
6322e5c5 L |
5497 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
5498 | output_bfd, | |
5499 | h->root.root.string, | |
5500 | h->root.u.def.section->owner); | |
5501 | ||
233cc9c1 L |
5502 | rela.r_info = htab->r_info (0, |
5503 | R_X86_64_IRELATIVE); | |
5504 | rela.r_addend = (h->root.u.def.value | |
5505 | + h->root.u.def.section->output_section->vma | |
5506 | + h->root.u.def.section->output_offset); | |
5507 | } | |
5508 | else | |
5509 | goto do_glob_dat; | |
5510 | } | |
5511 | else if (bfd_link_pic (info)) | |
710ab287 L |
5512 | { |
5513 | /* Generate R_X86_64_GLOB_DAT. */ | |
5514 | goto do_glob_dat; | |
5515 | } | |
5516 | else | |
5517 | { | |
90d60710 | 5518 | asection *plt; |
aab82f4c | 5519 | bfd_vma plt_offset; |
90d60710 | 5520 | |
710ab287 L |
5521 | if (!h->pointer_equality_needed) |
5522 | abort (); | |
5523 | ||
5524 | /* For non-shared object, we can't use .got.plt, which | |
5525 | contains the real function addres if we need pointer | |
5526 | equality. We load the GOT entry with the PLT entry. */ | |
f2c29a16 | 5527 | if (htab->plt_second != NULL) |
aab82f4c | 5528 | { |
f2c29a16 L |
5529 | plt = htab->plt_second; |
5530 | plt_offset = eh->plt_second.offset; | |
aab82f4c L |
5531 | } |
5532 | else | |
5533 | { | |
5534 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
5535 | plt_offset = h->plt.offset; | |
5536 | } | |
710ab287 L |
5537 | bfd_put_64 (output_bfd, (plt->output_section->vma |
5538 | + plt->output_offset | |
aab82f4c | 5539 | + plt_offset), |
6de2ae4a | 5540 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
5541 | return TRUE; |
5542 | } | |
0018b0a3 | 5543 | } |
0e1862bb | 5544 | else if (bfd_link_pic (info) |
0018b0a3 | 5545 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
053579d7 | 5546 | { |
41bed6dd L |
5547 | if (!h->def_regular) |
5548 | return FALSE; | |
cc78d0af | 5549 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 5550 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
5551 | rela.r_addend = (h->root.u.def.value |
5552 | + h->root.u.def.section->output_section->vma | |
5553 | + h->root.u.def.section->output_offset); | |
5554 | } | |
5555 | else | |
5556 | { | |
5557 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 5558 | do_glob_dat: |
c434dee6 | 5559 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 5560 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 5561 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
5562 | rela.r_addend = 0; |
5563 | } | |
5564 | ||
233cc9c1 | 5565 | elf_append_rela (output_bfd, relgot, &rela); |
053579d7 AJ |
5566 | } |
5567 | ||
f5385ebf | 5568 | if (h->needs_copy) |
70256ad8 | 5569 | { |
70256ad8 | 5570 | Elf_Internal_Rela rela; |
5474d94f | 5571 | asection *s; |
70256ad8 AJ |
5572 | |
5573 | /* This symbol needs a copy reloc. Set it up. */ | |
5574 | ||
c434dee6 AJ |
5575 | if (h->dynindx == -1 |
5576 | || (h->root.type != bfd_link_hash_defined | |
5577 | && h->root.type != bfd_link_hash_defweak) | |
5474d94f AM |
5578 | || htab->elf.srelbss == NULL |
5579 | || htab->elf.sreldynrelro == NULL) | |
c434dee6 | 5580 | abort (); |
70256ad8 AJ |
5581 | |
5582 | rela.r_offset = (h->root.u.def.value | |
5583 | + h->root.u.def.section->output_section->vma | |
5584 | + h->root.u.def.section->output_offset); | |
351f65ca | 5585 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 5586 | rela.r_addend = 0; |
afbf7e8e | 5587 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
5588 | s = htab->elf.sreldynrelro; |
5589 | else | |
5590 | s = htab->elf.srelbss; | |
5591 | elf_append_rela (output_bfd, s, &rela); | |
70256ad8 AJ |
5592 | } |
5593 | ||
b34976b6 | 5594 | return TRUE; |
70256ad8 AJ |
5595 | } |
5596 | ||
c25bc9fc L |
5597 | /* Finish up local dynamic symbol handling. We set the contents of |
5598 | various dynamic sections here. */ | |
5599 | ||
5600 | static bfd_boolean | |
351f65ca | 5601 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
5602 | { |
5603 | struct elf_link_hash_entry *h | |
5604 | = (struct elf_link_hash_entry *) *slot; | |
5605 | struct bfd_link_info *info | |
eed180f8 | 5606 | = (struct bfd_link_info *) inf; |
c25bc9fc | 5607 | |
351f65ca | 5608 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
5f0f0847 | 5609 | info, h, NULL); |
c25bc9fc L |
5610 | } |
5611 | ||
aec6b87e L |
5612 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
5613 | here since undefined weak symbol may not be dynamic and may not be | |
5614 | called for elf_x86_64_finish_dynamic_symbol. */ | |
5615 | ||
5616 | static bfd_boolean | |
5617 | elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
5618 | void *inf) | |
5619 | { | |
5620 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
5621 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
5622 | ||
5623 | if (h->root.type != bfd_link_hash_undefweak | |
5624 | || h->dynindx != -1) | |
5625 | return TRUE; | |
5626 | ||
5627 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, | |
5f0f0847 | 5628 | info, h, NULL); |
aec6b87e L |
5629 | } |
5630 | ||
c434dee6 AJ |
5631 | /* Used to decide how to sort relocs in an optimal manner for the |
5632 | dynamic linker, before writing them out. */ | |
5633 | ||
5634 | static enum elf_reloc_type_class | |
cae1fbbb | 5635 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
5636 | const asection *rel_sec ATTRIBUTE_UNUSED, |
5637 | const Elf_Internal_Rela *rela) | |
c434dee6 | 5638 | { |
cae1fbbb L |
5639 | bfd *abfd = info->output_bfd; |
5640 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
0afcef53 L |
5641 | struct elf_x86_link_hash_table *htab |
5642 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
cae1fbbb | 5643 | |
d9e3b590 L |
5644 | if (htab->elf.dynsym != NULL |
5645 | && htab->elf.dynsym->contents != NULL) | |
5646 | { | |
5647 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
5648 | dynamic symbols. */ | |
5649 | unsigned long r_symndx = htab->r_sym (rela->r_info); | |
897463b1 L |
5650 | if (r_symndx != STN_UNDEF) |
5651 | { | |
5652 | Elf_Internal_Sym sym; | |
5653 | if (!bed->s->swap_symbol_in (abfd, | |
5654 | (htab->elf.dynsym->contents | |
5655 | + r_symndx * bed->s->sizeof_sym), | |
5656 | 0, &sym)) | |
5657 | abort (); | |
d9e3b590 | 5658 | |
897463b1 L |
5659 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
5660 | return reloc_class_ifunc; | |
5661 | } | |
d9e3b590 | 5662 | } |
cae1fbbb | 5663 | |
351f65ca | 5664 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 | 5665 | { |
c428ce9d L |
5666 | case R_X86_64_IRELATIVE: |
5667 | return reloc_class_ifunc; | |
c434dee6 | 5668 | case R_X86_64_RELATIVE: |
1da80baa | 5669 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
5670 | return reloc_class_relative; |
5671 | case R_X86_64_JUMP_SLOT: | |
5672 | return reloc_class_plt; | |
5673 | case R_X86_64_COPY: | |
5674 | return reloc_class_copy; | |
5675 | default: | |
5676 | return reloc_class_normal; | |
5677 | } | |
5678 | } | |
5679 | ||
70256ad8 AJ |
5680 | /* Finish up the dynamic sections. */ |
5681 | ||
b34976b6 | 5682 | static bfd_boolean |
351f65ca L |
5683 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
5684 | struct bfd_link_info *info) | |
70256ad8 | 5685 | { |
0afcef53 | 5686 | struct elf_x86_link_hash_table *htab; |
70256ad8 AJ |
5687 | bfd *dynobj; |
5688 | asection *sdyn; | |
70256ad8 | 5689 | |
0afcef53 | 5690 | htab = elf_x86_hash_table (info, X86_64_ELF_DATA); |
4dfe6ac6 NC |
5691 | if (htab == NULL) |
5692 | return FALSE; | |
5693 | ||
c434dee6 | 5694 | dynobj = htab->elf.dynobj; |
3d4d4302 | 5695 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
70256ad8 | 5696 | |
c434dee6 | 5697 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 5698 | { |
82e96e07 L |
5699 | bfd_byte *dyncon, *dynconend; |
5700 | const struct elf_backend_data *bed; | |
5701 | bfd_size_type sizeof_dyn; | |
70256ad8 | 5702 | |
6de2ae4a | 5703 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 5704 | abort (); |
70256ad8 | 5705 | |
82e96e07 L |
5706 | bed = get_elf_backend_data (dynobj); |
5707 | sizeof_dyn = bed->s->sizeof_dyn; | |
5708 | dyncon = sdyn->contents; | |
5709 | dynconend = sdyn->contents + sdyn->size; | |
5710 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
5711 | { |
5712 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
5713 | asection *s; |
5714 | ||
82e96e07 | 5715 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
5716 | |
5717 | switch (dyn.d_tag) | |
5718 | { | |
5719 | default: | |
053579d7 | 5720 | continue; |
70256ad8 AJ |
5721 | |
5722 | case DT_PLTGOT: | |
6de2ae4a | 5723 | s = htab->elf.sgotplt; |
8c37241b | 5724 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 5725 | break; |
70256ad8 AJ |
5726 | |
5727 | case DT_JMPREL: | |
6de2ae4a | 5728 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 5729 | break; |
70256ad8 | 5730 | |
c434dee6 | 5731 | case DT_PLTRELSZ: |
6de2ae4a | 5732 | s = htab->elf.srelplt->output_section; |
eea6121a | 5733 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
5734 | break; |
5735 | ||
67a4f2b7 | 5736 | case DT_TLSDESC_PLT: |
6de2ae4a | 5737 | s = htab->elf.splt; |
67a4f2b7 AO |
5738 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
5739 | + htab->tlsdesc_plt; | |
5740 | break; | |
5741 | ||
5742 | case DT_TLSDESC_GOT: | |
6de2ae4a | 5743 | s = htab->elf.sgot; |
67a4f2b7 AO |
5744 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
5745 | + htab->tlsdesc_got; | |
5746 | break; | |
70256ad8 | 5747 | } |
c434dee6 | 5748 | |
82e96e07 | 5749 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
5750 | } |
5751 | ||
6de2ae4a | 5752 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 5753 | { |
eed180f8 | 5754 | elf_section_data (htab->elf.splt->output_section) |
765e526c | 5755 | ->this_hdr.sh_entsize = htab->plt.plt_entry_size; |
67a4f2b7 | 5756 | |
765e526c | 5757 | if (htab->plt.has_plt0) |
67a4f2b7 | 5758 | { |
38b12349 L |
5759 | /* Fill in the special first entry in the procedure linkage |
5760 | table. */ | |
5761 | memcpy (htab->elf.splt->contents, | |
765e526c L |
5762 | htab->lazy_plt->plt0_entry, |
5763 | htab->lazy_plt->plt0_entry_size); | |
38b12349 L |
5764 | /* Add offset for pushq GOT+8(%rip), since the instruction |
5765 | uses 6 bytes subtract this value. */ | |
67a4f2b7 | 5766 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5767 | (htab->elf.sgotplt->output_section->vma |
5768 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 5769 | + 8 |
6de2ae4a L |
5770 | - htab->elf.splt->output_section->vma |
5771 | - htab->elf.splt->output_offset | |
67a4f2b7 | 5772 | - 6), |
38b12349 | 5773 | (htab->elf.splt->contents |
765e526c | 5774 | + htab->lazy_plt->plt0_got1_offset)); |
38b12349 L |
5775 | /* Add offset for the PC-relative instruction accessing |
5776 | GOT+16, subtracting the offset to the end of that | |
5777 | instruction. */ | |
67a4f2b7 | 5778 | bfd_put_32 (output_bfd, |
38b12349 L |
5779 | (htab->elf.sgotplt->output_section->vma |
5780 | + htab->elf.sgotplt->output_offset | |
5781 | + 16 | |
6de2ae4a L |
5782 | - htab->elf.splt->output_section->vma |
5783 | - htab->elf.splt->output_offset | |
765e526c | 5784 | - htab->lazy_plt->plt0_got2_insn_end), |
38b12349 | 5785 | (htab->elf.splt->contents |
765e526c | 5786 | + htab->lazy_plt->plt0_got2_offset)); |
38b12349 L |
5787 | |
5788 | if (htab->tlsdesc_plt) | |
5789 | { | |
5790 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
5791 | htab->elf.sgot->contents + htab->tlsdesc_got); | |
5792 | ||
5793 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, | |
765e526c L |
5794 | htab->lazy_plt->plt0_entry, |
5795 | htab->lazy_plt->plt0_entry_size); | |
38b12349 L |
5796 | |
5797 | /* Add offset for pushq GOT+8(%rip), since the | |
5798 | instruction uses 6 bytes subtract this value. */ | |
5799 | bfd_put_32 (output_bfd, | |
5800 | (htab->elf.sgotplt->output_section->vma | |
5801 | + htab->elf.sgotplt->output_offset | |
5802 | + 8 | |
5803 | - htab->elf.splt->output_section->vma | |
5804 | - htab->elf.splt->output_offset | |
5805 | - htab->tlsdesc_plt | |
5806 | - 6), | |
5807 | (htab->elf.splt->contents | |
5808 | + htab->tlsdesc_plt | |
765e526c | 5809 | + htab->lazy_plt->plt0_got1_offset)); |
38b12349 L |
5810 | /* Add offset for the PC-relative instruction accessing |
5811 | GOT+TDG, where TDG stands for htab->tlsdesc_got, | |
5812 | subtracting the offset to the end of that | |
5813 | instruction. */ | |
5814 | bfd_put_32 (output_bfd, | |
5815 | (htab->elf.sgot->output_section->vma | |
5816 | + htab->elf.sgot->output_offset | |
5817 | + htab->tlsdesc_got | |
5818 | - htab->elf.splt->output_section->vma | |
5819 | - htab->elf.splt->output_offset | |
5820 | - htab->tlsdesc_plt | |
765e526c | 5821 | - htab->lazy_plt->plt0_got2_insn_end), |
38b12349 L |
5822 | (htab->elf.splt->contents |
5823 | + htab->tlsdesc_plt | |
765e526c | 5824 | + htab->lazy_plt->plt0_got2_offset)); |
38b12349 | 5825 | } |
67a4f2b7 | 5826 | } |
70256ad8 | 5827 | } |
70256ad8 | 5828 | |
0afcef53 L |
5829 | if (htab->plt_got != NULL && htab->plt_got->size > 0) |
5830 | elf_section_data (htab->plt_got->output_section) | |
765e526c | 5831 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; |
38b12349 | 5832 | |
0afcef53 L |
5833 | if (htab->plt_second != NULL && htab->plt_second->size > 0) |
5834 | elf_section_data (htab->plt_second->output_section) | |
765e526c | 5835 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; |
0afcef53 | 5836 | } |
0ff2b86e | 5837 | |
38b12349 L |
5838 | /* GOT is always created in setup_gnu_properties. But it may not be |
5839 | needed. */ | |
5840 | if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0) | |
70256ad8 | 5841 | { |
56d4289c L |
5842 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
5843 | { | |
4eca0228 | 5844 | _bfd_error_handler |
56d4289c L |
5845 | (_("discarded output section: `%A'"), htab->elf.sgotplt); |
5846 | return FALSE; | |
5847 | } | |
5848 | ||
38b12349 L |
5849 | /* Set the first entry in the global offset table to the address of |
5850 | the dynamic section. */ | |
5851 | if (sdyn == NULL) | |
5852 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); | |
5853 | else | |
5854 | bfd_put_64 (output_bfd, | |
5855 | sdyn->output_section->vma + sdyn->output_offset, | |
5856 | htab->elf.sgotplt->contents); | |
5857 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ | |
5858 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
5859 | htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); | |
5860 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
5861 | htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
5862 | ||
5863 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize | |
5864 | = GOT_ENTRY_SIZE; | |
c434dee6 | 5865 | } |
70256ad8 | 5866 | |
e41b3a13 | 5867 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
5868 | if (htab->plt_eh_frame != NULL |
5869 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
5870 | { |
5871 | if (htab->elf.splt != NULL | |
5872 | && htab->elf.splt->size != 0 | |
5873 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
5874 | && htab->elf.splt->output_section != NULL | |
5875 | && htab->plt_eh_frame->output_section != NULL) | |
5876 | { | |
5877 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
5878 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
5879 | + htab->plt_eh_frame->output_offset | |
5880 | + PLT_FDE_START_OFFSET; | |
5881 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5882 | htab->plt_eh_frame->contents | |
5883 | + PLT_FDE_START_OFFSET); | |
5884 | } | |
dbaa2011 | 5885 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
5886 | { |
5887 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5888 | htab->plt_eh_frame, | |
5889 | htab->plt_eh_frame->contents)) | |
5890 | return FALSE; | |
5891 | } | |
5892 | } | |
5893 | ||
fff53dae L |
5894 | /* Adjust .eh_frame for .plt.got section. */ |
5895 | if (htab->plt_got_eh_frame != NULL | |
5896 | && htab->plt_got_eh_frame->contents != NULL) | |
5897 | { | |
5898 | if (htab->plt_got != NULL | |
5899 | && htab->plt_got->size != 0 | |
5900 | && (htab->plt_got->flags & SEC_EXCLUDE) == 0 | |
5901 | && htab->plt_got->output_section != NULL | |
5902 | && htab->plt_got_eh_frame->output_section != NULL) | |
5903 | { | |
5904 | bfd_vma plt_start = htab->plt_got->output_section->vma; | |
5905 | bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma | |
5906 | + htab->plt_got_eh_frame->output_offset | |
5907 | + PLT_FDE_START_OFFSET; | |
5908 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5909 | htab->plt_got_eh_frame->contents | |
5910 | + PLT_FDE_START_OFFSET); | |
5911 | } | |
5912 | if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
5913 | { | |
5914 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5915 | htab->plt_got_eh_frame, | |
5916 | htab->plt_got_eh_frame->contents)) | |
5917 | return FALSE; | |
5918 | } | |
5919 | } | |
5920 | ||
f2c29a16 L |
5921 | /* Adjust .eh_frame for the second PLT section. */ |
5922 | if (htab->plt_second_eh_frame != NULL | |
5923 | && htab->plt_second_eh_frame->contents != NULL) | |
8361ed4d | 5924 | { |
f2c29a16 L |
5925 | if (htab->plt_second != NULL |
5926 | && htab->plt_second->size != 0 | |
5927 | && (htab->plt_second->flags & SEC_EXCLUDE) == 0 | |
5928 | && htab->plt_second->output_section != NULL | |
5929 | && htab->plt_second_eh_frame->output_section != NULL) | |
8361ed4d | 5930 | { |
f2c29a16 L |
5931 | bfd_vma plt_start = htab->plt_second->output_section->vma; |
5932 | bfd_vma eh_frame_start | |
5933 | = (htab->plt_second_eh_frame->output_section->vma | |
5934 | + htab->plt_second_eh_frame->output_offset | |
5935 | + PLT_FDE_START_OFFSET); | |
8361ed4d | 5936 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, |
f2c29a16 | 5937 | htab->plt_second_eh_frame->contents |
8361ed4d L |
5938 | + PLT_FDE_START_OFFSET); |
5939 | } | |
f2c29a16 L |
5940 | if (htab->plt_second_eh_frame->sec_info_type |
5941 | == SEC_INFO_TYPE_EH_FRAME) | |
8361ed4d L |
5942 | { |
5943 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
f2c29a16 L |
5944 | htab->plt_second_eh_frame, |
5945 | htab->plt_second_eh_frame->contents)) | |
8361ed4d L |
5946 | return FALSE; |
5947 | } | |
5948 | } | |
5949 | ||
6de2ae4a L |
5950 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
5951 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
5952 | = GOT_ENTRY_SIZE; |
5953 | ||
aec6b87e L |
5954 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
5955 | if (bfd_link_pie (info)) | |
5956 | bfd_hash_traverse (&info->hash->table, | |
5957 | elf_x86_64_pie_finish_undefweak_symbol, | |
5958 | info); | |
5959 | ||
b34976b6 | 5960 | return TRUE; |
8d88c4ca NC |
5961 | } |
5962 | ||
233cc9c1 L |
5963 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
5964 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
5965 | It has to be done before elf_link_sort_relocs is called so that | |
5966 | dynamic relocations are properly sorted. */ | |
5967 | ||
5968 | static bfd_boolean | |
5969 | elf_x86_64_output_arch_local_syms | |
5970 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
5971 | struct bfd_link_info *info, | |
5972 | void *flaginfo ATTRIBUTE_UNUSED, | |
5973 | int (*func) (void *, const char *, | |
5974 | Elf_Internal_Sym *, | |
5975 | asection *, | |
5976 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
5977 | { | |
0afcef53 L |
5978 | struct elf_x86_link_hash_table *htab |
5979 | = elf_x86_hash_table (info, X86_64_ELF_DATA); | |
233cc9c1 L |
5980 | if (htab == NULL) |
5981 | return FALSE; | |
5982 | ||
5983 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
5984 | htab_traverse (htab->loc_hash_table, | |
5985 | elf_x86_64_finish_local_dynamic_symbol, | |
5986 | info); | |
5987 | ||
5988 | return TRUE; | |
5989 | } | |
5990 | ||
38b12349 | 5991 | /* Forward declaration. */ |
765e526c | 5992 | static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt; |
38b12349 L |
5993 | |
5994 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all | |
5995 | dynamic relocations. */ | |
5996 | ||
5997 | static long | |
5998 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
5999 | long symcount ATTRIBUTE_UNUSED, | |
6000 | asymbol **syms ATTRIBUTE_UNUSED, | |
6001 | long dynsymcount, | |
6002 | asymbol **dynsyms, | |
6003 | asymbol **ret) | |
6004 | { | |
f493882d | 6005 | long count, i, n; |
38b12349 | 6006 | int j; |
38b12349 | 6007 | bfd_byte *plt_contents; |
f493882d | 6008 | long relsize; |
765e526c L |
6009 | const struct elf_x86_lazy_plt_layout *lazy_plt; |
6010 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
6011 | const struct elf_x86_lazy_plt_layout *lazy_bnd_plt; | |
6012 | const struct elf_x86_non_lazy_plt_layout *non_lazy_bnd_plt; | |
6013 | const struct elf_x86_lazy_plt_layout *lazy_ibt_plt; | |
6014 | const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt; | |
38b12349 | 6015 | asection *plt; |
f493882d L |
6016 | enum elf_x86_plt_type plt_type; |
6017 | struct elf_x86_plt plts[] = | |
144bed8d | 6018 | { |
38b12349 L |
6019 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
6020 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
f2c29a16 L |
6021 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, |
6022 | { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
dd9e66ee | 6023 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } |
38b12349 | 6024 | }; |
144bed8d | 6025 | |
38b12349 | 6026 | *ret = NULL; |
144bed8d | 6027 | |
38b12349 L |
6028 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
6029 | return 0; | |
144bed8d | 6030 | |
38b12349 L |
6031 | if (dynsymcount <= 0) |
6032 | return 0; | |
cca5b8b6 | 6033 | |
38b12349 L |
6034 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
6035 | if (relsize <= 0) | |
6036 | return -1; | |
6037 | ||
38b12349 | 6038 | if (get_elf_x86_64_backend_data (abfd)->os == is_normal) |
144bed8d | 6039 | { |
38b12349 L |
6040 | lazy_plt = &elf_x86_64_lazy_plt; |
6041 | non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
6042 | lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt; | |
6043 | non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt; | |
ee2fdd6f L |
6044 | if (ABI_64_P (abfd)) |
6045 | { | |
6046 | lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; | |
6047 | non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
6048 | } | |
6049 | else | |
6050 | { | |
6051 | lazy_ibt_plt = &elf_x32_lazy_ibt_plt; | |
6052 | non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
6053 | } | |
38b12349 L |
6054 | } |
6055 | else | |
6056 | { | |
6057 | lazy_plt = &elf_x86_64_nacl_plt; | |
6058 | non_lazy_plt = NULL; | |
6059 | lazy_bnd_plt = NULL; | |
6060 | non_lazy_bnd_plt = NULL; | |
ee2fdd6f L |
6061 | lazy_ibt_plt = NULL; |
6062 | non_lazy_ibt_plt = NULL; | |
38b12349 | 6063 | } |
144bed8d | 6064 | |
38b12349 L |
6065 | count = 0; |
6066 | for (j = 0; plts[j].name != NULL; j++) | |
6067 | { | |
6068 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
90efb642 | 6069 | if (plt == NULL || plt->size == 0) |
6f25f223 | 6070 | continue; |
533d0af0 | 6071 | |
38b12349 L |
6072 | /* Get the PLT section contents. */ |
6073 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
6074 | if (plt_contents == NULL) | |
6075 | break; | |
6076 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
6077 | plt_contents, 0, plt->size)) | |
6078 | { | |
6079 | free (plt_contents); | |
6080 | break; | |
6081 | } | |
144bed8d | 6082 | |
38b12349 L |
6083 | /* Check what kind of PLT it is. */ |
6084 | plt_type = plt_unknown; | |
90efb642 L |
6085 | if (plts[j].type == plt_unknown |
6086 | && (plt->size >= (lazy_plt->plt_entry_size | |
6087 | + lazy_plt->plt_entry_size))) | |
144bed8d | 6088 | { |
38b12349 L |
6089 | /* Match lazy PLT first. Need to check the first two |
6090 | instructions. */ | |
6091 | if ((memcmp (plt_contents, lazy_plt->plt0_entry, | |
6092 | lazy_plt->plt0_got1_offset) == 0) | |
6093 | && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6, | |
6094 | 2) == 0)) | |
6095 | plt_type = plt_lazy; | |
6096 | else if (lazy_bnd_plt != NULL | |
6097 | && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry, | |
6098 | lazy_bnd_plt->plt0_got1_offset) == 0) | |
6099 | && (memcmp (plt_contents + 6, | |
6100 | lazy_bnd_plt->plt0_entry + 6, 3) == 0)) | |
ec1f73bb | 6101 | { |
f2c29a16 | 6102 | plt_type = plt_lazy | plt_second; |
ee2fdd6f L |
6103 | /* The fist entry in the lazy IBT PLT is the same as the |
6104 | lazy BND PLT. */ | |
6105 | if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size, | |
6106 | lazy_ibt_plt->plt_entry, | |
6107 | lazy_ibt_plt->plt_got_offset) == 0)) | |
6108 | lazy_plt = lazy_ibt_plt; | |
6109 | else | |
6110 | lazy_plt = lazy_bnd_plt; | |
ec1f73bb | 6111 | } |
144bed8d | 6112 | } |
fca6ae69 | 6113 | |
38b12349 | 6114 | if (non_lazy_plt != NULL |
90efb642 L |
6115 | && (plt_type == plt_unknown || plt_type == plt_non_lazy) |
6116 | && plt->size >= non_lazy_plt->plt_entry_size) | |
38b12349 L |
6117 | { |
6118 | /* Match non-lazy PLT. */ | |
6119 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
6120 | non_lazy_plt->plt_got_offset) == 0) | |
6121 | plt_type = plt_non_lazy; | |
6122 | } | |
6123 | ||
ee2fdd6f | 6124 | if (plt_type == plt_unknown || plt_type == plt_second) |
38b12349 | 6125 | { |
ee2fdd6f | 6126 | if (non_lazy_bnd_plt != NULL |
90efb642 | 6127 | && plt->size >= non_lazy_bnd_plt->plt_entry_size |
ee2fdd6f L |
6128 | && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry, |
6129 | non_lazy_bnd_plt->plt_got_offset) == 0)) | |
38b12349 | 6130 | { |
ee2fdd6f | 6131 | /* Match BND PLT. */ |
f2c29a16 | 6132 | plt_type = plt_second; |
38b12349 L |
6133 | non_lazy_plt = non_lazy_bnd_plt; |
6134 | } | |
ee2fdd6f | 6135 | else if (non_lazy_ibt_plt != NULL |
90efb642 | 6136 | && plt->size >= non_lazy_ibt_plt->plt_entry_size |
ee2fdd6f L |
6137 | && (memcmp (plt_contents, |
6138 | non_lazy_ibt_plt->plt_entry, | |
6139 | non_lazy_ibt_plt->plt_got_offset) == 0)) | |
6140 | { | |
6141 | /* Match IBT PLT. */ | |
6142 | plt_type = plt_second; | |
6143 | non_lazy_plt = non_lazy_ibt_plt; | |
6144 | } | |
38b12349 L |
6145 | } |
6146 | ||
6147 | if (plt_type == plt_unknown) | |
37c0b6ee L |
6148 | { |
6149 | free (plt_contents); | |
6150 | continue; | |
6151 | } | |
38b12349 L |
6152 | |
6153 | plts[j].sec = plt; | |
6154 | plts[j].type = plt_type; | |
6155 | ||
6156 | if ((plt_type & plt_lazy)) | |
6157 | { | |
6158 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
6159 | plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size; | |
6160 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
6161 | /* Skip PLT0 in lazy PLT. */ | |
6162 | i = 1; | |
6163 | } | |
6164 | else | |
6165 | { | |
6166 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
6167 | plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size; | |
6168 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
6169 | i = 0; | |
6170 | } | |
6171 | ||
f2c29a16 L |
6172 | /* Skip lazy PLT when the second PLT is used. */ |
6173 | if (plt_type == (plt_lazy | plt_second)) | |
38b12349 L |
6174 | plts[j].count = 0; |
6175 | else | |
6176 | { | |
6177 | n = plt->size / plts[j].plt_entry_size; | |
6178 | plts[j].count = n; | |
6179 | count += n - i; | |
6180 | } | |
6181 | ||
6182 | plts[j].contents = plt_contents; | |
144bed8d L |
6183 | } |
6184 | ||
f493882d L |
6185 | return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize, |
6186 | (bfd_vma) 0, plts, dynsyms, | |
6187 | ret); | |
0ff2b86e L |
6188 | } |
6189 | ||
d2b2c203 DJ |
6190 | /* Handle an x86-64 specific section when reading an object file. This |
6191 | is called when elfcode.h finds a section with an unknown type. */ | |
6192 | ||
6193 | static bfd_boolean | |
0c723101 L |
6194 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
6195 | const char *name, int shindex) | |
d2b2c203 DJ |
6196 | { |
6197 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
6198 | return FALSE; | |
6199 | ||
6dc132d9 | 6200 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
6201 | return FALSE; |
6202 | ||
6203 | return TRUE; | |
6204 | } | |
6205 | ||
3b22753a L |
6206 | /* Hook called by the linker routine which adds symbols from an object |
6207 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
6208 | of .bss. */ | |
6209 | ||
6210 | static bfd_boolean | |
351f65ca | 6211 | elf_x86_64_add_symbol_hook (bfd *abfd, |
a43942db | 6212 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
351f65ca L |
6213 | Elf_Internal_Sym *sym, |
6214 | const char **namep ATTRIBUTE_UNUSED, | |
6215 | flagword *flagsp ATTRIBUTE_UNUSED, | |
6216 | asection **secp, | |
6217 | bfd_vma *valp) | |
3b22753a L |
6218 | { |
6219 | asection *lcomm; | |
6220 | ||
6221 | switch (sym->st_shndx) | |
6222 | { | |
6223 | case SHN_X86_64_LCOMMON: | |
6224 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
6225 | if (lcomm == NULL) | |
6226 | { | |
6227 | lcomm = bfd_make_section_with_flags (abfd, | |
6228 | "LARGE_COMMON", | |
6229 | (SEC_ALLOC | |
6230 | | SEC_IS_COMMON | |
6231 | | SEC_LINKER_CREATED)); | |
6232 | if (lcomm == NULL) | |
6233 | return FALSE; | |
6234 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
6235 | } | |
6236 | *secp = lcomm; | |
6237 | *valp = sym->st_size; | |
c35bdf6e | 6238 | return TRUE; |
3b22753a | 6239 | } |
d8045f23 | 6240 | |
3b22753a L |
6241 | return TRUE; |
6242 | } | |
6243 | ||
6244 | ||
6245 | /* Given a BFD section, try to locate the corresponding ELF section | |
6246 | index. */ | |
6247 | ||
6248 | static bfd_boolean | |
351f65ca L |
6249 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
6250 | asection *sec, int *index_return) | |
3b22753a L |
6251 | { |
6252 | if (sec == &_bfd_elf_large_com_section) | |
6253 | { | |
91d6fa6a | 6254 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
6255 | return TRUE; |
6256 | } | |
6257 | return FALSE; | |
6258 | } | |
6259 | ||
6260 | /* Process a symbol. */ | |
6261 | ||
6262 | static void | |
351f65ca L |
6263 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
6264 | asymbol *asym) | |
3b22753a L |
6265 | { |
6266 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
6267 | ||
6268 | switch (elfsym->internal_elf_sym.st_shndx) | |
6269 | { | |
6270 | case SHN_X86_64_LCOMMON: | |
6271 | asym->section = &_bfd_elf_large_com_section; | |
6272 | asym->value = elfsym->internal_elf_sym.st_size; | |
6273 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
6274 | asym->flags &= ~BSF_GLOBAL; | |
6275 | break; | |
6276 | } | |
6277 | } | |
6278 | ||
6279 | static bfd_boolean | |
351f65ca | 6280 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
6281 | { |
6282 | return (sym->st_shndx == SHN_COMMON | |
6283 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
6284 | } | |
6285 | ||
6286 | static unsigned int | |
351f65ca | 6287 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
6288 | { |
6289 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
6290 | return SHN_COMMON; | |
6291 | else | |
6292 | return SHN_X86_64_LCOMMON; | |
6293 | } | |
6294 | ||
6295 | static asection * | |
351f65ca | 6296 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
6297 | { |
6298 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
6299 | return bfd_com_section_ptr; | |
6300 | else | |
6301 | return &_bfd_elf_large_com_section; | |
6302 | } | |
6303 | ||
6304 | static bfd_boolean | |
5d13b3b3 AM |
6305 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
6306 | const Elf_Internal_Sym *sym, | |
351f65ca | 6307 | asection **psec, |
5d13b3b3 AM |
6308 | bfd_boolean newdef, |
6309 | bfd_boolean olddef, | |
351f65ca | 6310 | bfd *oldbfd, |
5d13b3b3 | 6311 | const asection *oldsec) |
3b22753a L |
6312 | { |
6313 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
6314 | normal common symbol. We turn the large common symbol into a |
6315 | normal one. */ | |
5d13b3b3 | 6316 | if (!olddef |
3b22753a | 6317 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
6318 | && !newdef |
6319 | && bfd_is_com_section (*psec) | |
6320 | && oldsec != *psec) | |
3b22753a | 6321 | { |
00492999 | 6322 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 6323 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
6324 | { |
6325 | h->root.u.c.p->section | |
6326 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
6327 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
6328 | } | |
6329 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
6330 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
6331 | *psec = bfd_com_section_ptr; | |
3b22753a L |
6332 | } |
6333 | ||
6334 | return TRUE; | |
6335 | } | |
6336 | ||
6337 | static int | |
351f65ca L |
6338 | elf_x86_64_additional_program_headers (bfd *abfd, |
6339 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
6340 | { |
6341 | asection *s; | |
9a2e389a | 6342 | int count = 0; |
3b22753a L |
6343 | |
6344 | /* Check to see if we need a large readonly segment. */ | |
6345 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
6346 | if (s && (s->flags & SEC_LOAD)) | |
6347 | count++; | |
6348 | ||
6349 | /* Check to see if we need a large data segment. Since .lbss sections | |
6350 | is placed right after the .bss section, there should be no need for | |
6351 | a large data segment just because of .lbss. */ | |
6352 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
6353 | if (s && (s->flags & SEC_LOAD)) | |
6354 | count++; | |
6355 | ||
6356 | return count; | |
6357 | } | |
6358 | ||
c543bf9a L |
6359 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
6360 | ||
6361 | static bfd_boolean | |
6362 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
6363 | const bfd_target *output) | |
6364 | { | |
6365 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
6366 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
6367 | && _bfd_elf_relocs_compatible (input, output)); | |
6368 | } | |
6369 | ||
38b12349 L |
6370 | /* Set up x86-64 GNU properties. Return the first relocatable ELF input |
6371 | with GNU properties if found. Otherwise, return NULL. */ | |
6372 | ||
6373 | static bfd * | |
6374 | elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info) | |
6375 | { | |
a6798bab | 6376 | struct elf_x86_plt_layout_table plt_layout; |
ee2fdd6f | 6377 | |
a6798bab L |
6378 | plt_layout.is_vxworks = FALSE; |
6379 | if (get_elf_x86_64_backend_data (info->output_bfd)->os == is_normal) | |
73784fa5 | 6380 | { |
a6798bab | 6381 | if (info->bndplt) |
ee2fdd6f | 6382 | { |
a6798bab L |
6383 | plt_layout.lazy_plt = &elf_x86_64_lazy_bnd_plt; |
6384 | plt_layout.non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt; | |
ee2fdd6f L |
6385 | } |
6386 | else | |
6387 | { | |
a6798bab L |
6388 | plt_layout.lazy_plt = &elf_x86_64_lazy_plt; |
6389 | plt_layout.non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
ee2fdd6f | 6390 | } |
38b12349 | 6391 | |
a6798bab | 6392 | if (ABI_64_P (info->output_bfd)) |
38b12349 | 6393 | { |
a6798bab L |
6394 | plt_layout.lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt; |
6395 | plt_layout.non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt; | |
38b12349 L |
6396 | } |
6397 | else | |
6398 | { | |
a6798bab L |
6399 | plt_layout.lazy_ibt_plt = &elf_x32_lazy_ibt_plt; |
6400 | plt_layout.non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt; | |
38b12349 | 6401 | } |
a6798bab | 6402 | plt_layout.normal_target = TRUE; |
38b12349 L |
6403 | } |
6404 | else | |
6405 | { | |
a6798bab L |
6406 | plt_layout.lazy_plt = &elf_x86_64_nacl_plt; |
6407 | plt_layout.non_lazy_plt = NULL; | |
6408 | plt_layout.lazy_ibt_plt = NULL; | |
6409 | plt_layout.non_lazy_ibt_plt = NULL; | |
6410 | plt_layout.normal_target = FALSE; | |
38b12349 L |
6411 | } |
6412 | ||
a6798bab | 6413 | return _bfd_x86_elf_link_setup_gnu_properties (info, &plt_layout); |
38b12349 L |
6414 | } |
6415 | ||
9a2e389a | 6416 | static const struct bfd_elf_special_section |
46bed679 | 6417 | elf_x86_64_special_sections[]= |
3b22753a | 6418 | { |
0112cd26 NC |
6419 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
6420 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
6421 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
6422 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
6423 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
6424 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
6425 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
6426 | }; |
6427 | ||
6d00b590 | 6428 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
6429 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
6430 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 6431 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 6432 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 6433 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 6434 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 6435 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
6436 | |
6437 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 6438 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
6439 | #define elf_backend_want_got_plt 1 |
6440 | #define elf_backend_plt_readonly 1 | |
6441 | #define elf_backend_want_plt_sym 0 | |
6442 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 6443 | #define elf_backend_rela_normal 1 |
e41b3a13 | 6444 | #define elf_backend_plt_alignment 4 |
f7483970 | 6445 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 6446 | #define elf_backend_caches_rawsize 1 |
64f52338 | 6447 | #define elf_backend_dtrel_excludes_plt 1 |
5474d94f | 6448 | #define elf_backend_want_dynrelro 1 |
70256ad8 | 6449 | |
351f65ca | 6450 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 6451 | |
351f65ca | 6452 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 6453 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 6454 | elf_x86_64_reloc_name_lookup |
70256ad8 | 6455 | |
351f65ca | 6456 | #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol |
c543bf9a | 6457 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca | 6458 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
38b12349 | 6459 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
351f65ca L |
6460 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections |
6461 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
233cc9c1 | 6462 | #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms |
351f65ca | 6463 | #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook |
351f65ca L |
6464 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus |
6465 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
6466 | #ifdef CORE_HEADER |
6467 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
6468 | #endif | |
351f65ca L |
6469 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
6470 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
6471 | #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections | |
74541ad4 | 6472 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 6473 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
0ff2b86e | 6474 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 6475 | |
d2b2c203 | 6476 | #define elf_backend_section_from_shdr \ |
351f65ca | 6477 | elf_x86_64_section_from_shdr |
d2b2c203 | 6478 | |
3b22753a | 6479 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 6480 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 6481 | #define elf_backend_add_symbol_hook \ |
351f65ca | 6482 | elf_x86_64_add_symbol_hook |
3b22753a | 6483 | #define elf_backend_symbol_processing \ |
351f65ca | 6484 | elf_x86_64_symbol_processing |
3b22753a | 6485 | #define elf_backend_common_section_index \ |
351f65ca | 6486 | elf_x86_64_common_section_index |
3b22753a | 6487 | #define elf_backend_common_section \ |
351f65ca | 6488 | elf_x86_64_common_section |
3b22753a | 6489 | #define elf_backend_common_definition \ |
351f65ca | 6490 | elf_x86_64_common_definition |
3b22753a | 6491 | #define elf_backend_merge_symbol \ |
351f65ca | 6492 | elf_x86_64_merge_symbol |
3b22753a | 6493 | #define elf_backend_special_sections \ |
351f65ca | 6494 | elf_x86_64_special_sections |
3b22753a | 6495 | #define elf_backend_additional_program_headers \ |
351f65ca | 6496 | elf_x86_64_additional_program_headers |
38b12349 L |
6497 | #define elf_backend_setup_gnu_properties \ |
6498 | elf_x86_64_link_setup_gnu_properties | |
3b22753a | 6499 | |
8d88c4ca | 6500 | #include "elf64-target.h" |
9d7cbccd | 6501 | |
6036f486 ES |
6502 | /* CloudABI support. */ |
6503 | ||
6504 | #undef TARGET_LITTLE_SYM | |
6505 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec | |
6506 | #undef TARGET_LITTLE_NAME | |
6507 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" | |
6508 | ||
6509 | #undef ELF_OSABI | |
6510 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
6511 | ||
6512 | #undef elf64_bed | |
6513 | #define elf64_bed elf64_x86_64_cloudabi_bed | |
6514 | ||
6515 | #include "elf64-target.h" | |
6516 | ||
9d7cbccd NC |
6517 | /* FreeBSD support. */ |
6518 | ||
6519 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6520 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
9d7cbccd NC |
6521 | #undef TARGET_LITTLE_NAME |
6522 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
6523 | ||
d1036acb L |
6524 | #undef ELF_OSABI |
6525 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 6526 | |
9d7cbccd NC |
6527 | #undef elf64_bed |
6528 | #define elf64_bed elf64_x86_64_fbsd_bed | |
6529 | ||
6530 | #include "elf64-target.h" | |
8a9036a4 | 6531 | |
a6cc6b3b RO |
6532 | /* Solaris 2 support. */ |
6533 | ||
6534 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6535 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
6536 | #undef TARGET_LITTLE_NAME |
6537 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
6538 | ||
6539 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
6540 | objects won't be recognized. */ | |
6541 | #undef ELF_OSABI | |
6542 | ||
6543 | #undef elf64_bed | |
6544 | #define elf64_bed elf64_x86_64_sol2_bed | |
6545 | ||
7dc98aea RO |
6546 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
6547 | boundary. */ | |
84865015 | 6548 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
6549 | #define elf_backend_static_tls_alignment 16 |
6550 | ||
a6cc6b3b RO |
6551 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
6552 | ||
6553 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
6554 | File, p.63. */ | |
84865015 | 6555 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
6556 | #define elf_backend_want_plt_sym 1 |
6557 | ||
84865015 NC |
6558 | #undef elf_backend_strtab_flags |
6559 | #define elf_backend_strtab_flags SHF_STRINGS | |
6560 | ||
6561 | static bfd_boolean | |
5522f910 NC |
6562 | elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
6563 | bfd *obfd ATTRIBUTE_UNUSED, | |
6564 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
6565 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
6566 | { |
6567 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
6568 | and sh_link fields of Solaris specific section types. */ | |
6569 | return FALSE; | |
6570 | } | |
6571 | ||
5522f910 NC |
6572 | #undef elf_backend_copy_special_section_fields |
6573 | #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields | |
84865015 | 6574 | |
a6cc6b3b RO |
6575 | #include "elf64-target.h" |
6576 | ||
8059fb19 RM |
6577 | /* Native Client support. */ |
6578 | ||
64b384e1 RM |
6579 | static bfd_boolean |
6580 | elf64_x86_64_nacl_elf_object_p (bfd *abfd) | |
6581 | { | |
6582 | /* Set the right machine number for a NaCl x86-64 ELF64 file. */ | |
6583 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl); | |
6584 | return TRUE; | |
6585 | } | |
6586 | ||
8059fb19 | 6587 | #undef TARGET_LITTLE_SYM |
6d00b590 | 6588 | #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec |
8059fb19 RM |
6589 | #undef TARGET_LITTLE_NAME |
6590 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
6591 | #undef elf64_bed | |
6592 | #define elf64_bed elf64_x86_64_nacl_bed | |
6593 | ||
6594 | #undef ELF_MAXPAGESIZE | |
6595 | #undef ELF_MINPAGESIZE | |
6596 | #undef ELF_COMMONPAGESIZE | |
6597 | #define ELF_MAXPAGESIZE 0x10000 | |
6598 | #define ELF_MINPAGESIZE 0x10000 | |
6599 | #define ELF_COMMONPAGESIZE 0x10000 | |
6600 | ||
6601 | /* Restore defaults. */ | |
6602 | #undef ELF_OSABI | |
6603 | #undef elf_backend_static_tls_alignment | |
6604 | #undef elf_backend_want_plt_sym | |
6605 | #define elf_backend_want_plt_sym 0 | |
84865015 | 6606 | #undef elf_backend_strtab_flags |
5522f910 | 6607 | #undef elf_backend_copy_special_section_fields |
8059fb19 RM |
6608 | |
6609 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
6610 | ||
6611 | #undef elf_backend_plt_alignment | |
6612 | #define elf_backend_plt_alignment 5 | |
6613 | #define NACL_PLT_ENTRY_SIZE 64 | |
6614 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
6615 | ||
6616 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
6617 | { | |
6618 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
6619 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ | |
6620 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
6621 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
6622 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
6623 | ||
ea2d813e | 6624 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
70cc877f | 6625 | 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */ |
ea2d813e RM |
6626 | |
6627 | /* 32 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 6628 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 6629 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 6630 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 6631 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 6632 | 0x66, /* excess data16 prefix */ |
ea2d813e | 6633 | 0x90 /* nop */ |
8059fb19 RM |
6634 | }; |
6635 | ||
6636 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6637 | { | |
6638 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
6639 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
6640 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
6641 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
6642 | ||
6643 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
3ddf1bdd | 6644 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
6645 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
6646 | ||
6647 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6648 | 0x68, /* pushq immediate */ | |
6649 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
6650 | 0xe9, /* jmp relative */ | |
6651 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
6652 | ||
6653 | /* 22 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 6654 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
6655 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
6656 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ | |
6657 | }; | |
6658 | ||
6659 | /* .eh_frame covering the .plt section. */ | |
6660 | ||
6661 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
6662 | { | |
6663 | #if (PLT_CIE_LENGTH != 20 \ | |
6664 | || PLT_FDE_LENGTH != 36 \ | |
6665 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
6666 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
6667 | # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!" | |
6668 | #endif | |
6669 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
6670 | 0, 0, 0, 0, /* CIE ID */ | |
6671 | 1, /* CIE version */ | |
6672 | 'z', 'R', 0, /* Augmentation string */ | |
6673 | 1, /* Code alignment factor */ | |
6674 | 0x78, /* Data alignment factor */ | |
6675 | 16, /* Return address column */ | |
6676 | 1, /* Augmentation size */ | |
6677 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
6678 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
6679 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
6680 | DW_CFA_nop, DW_CFA_nop, | |
6681 | ||
6682 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
6683 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
6684 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
6685 | 0, 0, 0, 0, /* .plt size goes here */ | |
6686 | 0, /* Augmentation size */ | |
6687 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
6688 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
6689 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
6690 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
6691 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
6692 | 13, /* Block length */ | |
6693 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
6694 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
6695 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
6696 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
6697 | DW_CFA_nop, DW_CFA_nop | |
6698 | }; | |
6699 | ||
765e526c | 6700 | static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt = |
8059fb19 RM |
6701 | { |
6702 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ | |
765e526c | 6703 | NACL_PLT_ENTRY_SIZE, /* plt0_entry_size */ |
8059fb19 RM |
6704 | elf_x86_64_nacl_plt_entry, /* plt_entry */ |
6705 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
6706 | 2, /* plt0_got1_offset */ | |
6707 | 9, /* plt0_got2_offset */ | |
6708 | 13, /* plt0_got2_insn_end */ | |
6709 | 3, /* plt_got_offset */ | |
6710 | 33, /* plt_reloc_offset */ | |
6711 | 38, /* plt_plt_offset */ | |
6712 | 7, /* plt_got_insn_size */ | |
6713 | 42, /* plt_plt_insn_end */ | |
6714 | 32, /* plt_lazy_offset */ | |
a6798bab L |
6715 | elf_x86_64_nacl_plt0_entry, /* pic_plt0_entry */ |
6716 | elf_x86_64_nacl_plt_entry, /* pic_plt_entry */ | |
8059fb19 | 6717 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ |
38b12349 L |
6718 | sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */ |
6719 | }; | |
6720 | ||
6721 | static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed = | |
6722 | { | |
6723 | is_nacl /* os */ | |
8059fb19 RM |
6724 | }; |
6725 | ||
6726 | #undef elf_backend_arch_data | |
6727 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
6728 | ||
64b384e1 RM |
6729 | #undef elf_backend_object_p |
6730 | #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p | |
5a68afcf RM |
6731 | #undef elf_backend_modify_segment_map |
6732 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
6733 | #undef elf_backend_modify_program_headers | |
6734 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
6735 | #undef elf_backend_final_write_processing |
6736 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 6737 | |
8059fb19 RM |
6738 | #include "elf64-target.h" |
6739 | ||
6740 | /* Native Client x32 support. */ | |
6741 | ||
64b384e1 RM |
6742 | static bfd_boolean |
6743 | elf32_x86_64_nacl_elf_object_p (bfd *abfd) | |
6744 | { | |
6745 | /* Set the right machine number for a NaCl x86-64 ELF32 file. */ | |
6746 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl); | |
6747 | return TRUE; | |
6748 | } | |
6749 | ||
8059fb19 | 6750 | #undef TARGET_LITTLE_SYM |
6d00b590 | 6751 | #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec |
8059fb19 RM |
6752 | #undef TARGET_LITTLE_NAME |
6753 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" | |
6754 | #undef elf32_bed | |
6755 | #define elf32_bed elf32_x86_64_nacl_bed | |
6756 | ||
8059fb19 RM |
6757 | #define bfd_elf32_bfd_reloc_type_lookup \ |
6758 | elf_x86_64_reloc_type_lookup | |
6759 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
6760 | elf_x86_64_reloc_name_lookup | |
b7365e5d L |
6761 | #define bfd_elf32_get_synthetic_symtab \ |
6762 | elf_x86_64_get_synthetic_symtab | |
8059fb19 RM |
6763 | |
6764 | #undef elf_backend_object_p | |
6765 | #define elf_backend_object_p \ | |
64b384e1 | 6766 | elf32_x86_64_nacl_elf_object_p |
8059fb19 RM |
6767 | |
6768 | #undef elf_backend_bfd_from_remote_memory | |
6769 | #define elf_backend_bfd_from_remote_memory \ | |
6770 | _bfd_elf32_bfd_from_remote_memory | |
6771 | ||
6772 | #undef elf_backend_size_info | |
6773 | #define elf_backend_size_info \ | |
6774 | _bfd_elf32_size_info | |
6775 | ||
6776 | #include "elf32-target.h" | |
6777 | ||
6778 | /* Restore defaults. */ | |
5a68afcf | 6779 | #undef elf_backend_object_p |
8059fb19 | 6780 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
6781 | #undef elf_backend_bfd_from_remote_memory |
6782 | #undef elf_backend_size_info | |
6783 | #undef elf_backend_modify_segment_map | |
6784 | #undef elf_backend_modify_program_headers | |
887badb3 | 6785 | #undef elf_backend_final_write_processing |
8059fb19 | 6786 | |
8a9036a4 L |
6787 | /* Intel L1OM support. */ |
6788 | ||
6789 | static bfd_boolean | |
6790 | elf64_l1om_elf_object_p (bfd *abfd) | |
6791 | { | |
6792 | /* Set the right machine number for an L1OM elf64 file. */ | |
6793 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
6794 | return TRUE; | |
6795 | } | |
6796 | ||
6797 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6798 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
6799 | #undef TARGET_LITTLE_NAME |
6800 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
6801 | #undef ELF_ARCH | |
6802 | #define ELF_ARCH bfd_arch_l1om | |
6803 | ||
6804 | #undef ELF_MACHINE_CODE | |
6805 | #define ELF_MACHINE_CODE EM_L1OM | |
6806 | ||
6807 | #undef ELF_OSABI | |
6808 | ||
6809 | #undef elf64_bed | |
6810 | #define elf64_bed elf64_l1om_bed | |
6811 | ||
6812 | #undef elf_backend_object_p | |
6813 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
6814 | ||
8059fb19 RM |
6815 | /* Restore defaults. */ |
6816 | #undef ELF_MAXPAGESIZE | |
6817 | #undef ELF_MINPAGESIZE | |
6818 | #undef ELF_COMMONPAGESIZE | |
6819 | #define ELF_MAXPAGESIZE 0x200000 | |
6820 | #define ELF_MINPAGESIZE 0x1000 | |
6821 | #define ELF_COMMONPAGESIZE 0x1000 | |
6822 | #undef elf_backend_plt_alignment | |
6823 | #define elf_backend_plt_alignment 4 | |
6824 | #undef elf_backend_arch_data | |
6825 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 6826 | |
8a9036a4 L |
6827 | #include "elf64-target.h" |
6828 | ||
6829 | /* FreeBSD L1OM support. */ | |
6830 | ||
6831 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6832 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
6833 | #undef TARGET_LITTLE_NAME |
6834 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
6835 | ||
6836 | #undef ELF_OSABI | |
6837 | #define ELF_OSABI ELFOSABI_FREEBSD | |
6838 | ||
6839 | #undef elf64_bed | |
6840 | #define elf64_bed elf64_l1om_fbsd_bed | |
6841 | ||
8a9036a4 | 6842 | #include "elf64-target.h" |
351f65ca | 6843 | |
7a9068fe L |
6844 | /* Intel K1OM support. */ |
6845 | ||
6846 | static bfd_boolean | |
6847 | elf64_k1om_elf_object_p (bfd *abfd) | |
6848 | { | |
6849 | /* Set the right machine number for an K1OM elf64 file. */ | |
6850 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
6851 | return TRUE; | |
6852 | } | |
6853 | ||
6854 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6855 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
6856 | #undef TARGET_LITTLE_NAME |
6857 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
6858 | #undef ELF_ARCH | |
6859 | #define ELF_ARCH bfd_arch_k1om | |
6860 | ||
6861 | #undef ELF_MACHINE_CODE | |
6862 | #define ELF_MACHINE_CODE EM_K1OM | |
6863 | ||
6864 | #undef ELF_OSABI | |
6865 | ||
6866 | #undef elf64_bed | |
6867 | #define elf64_bed elf64_k1om_bed | |
6868 | ||
6869 | #undef elf_backend_object_p | |
6870 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
6871 | ||
6872 | #undef elf_backend_static_tls_alignment | |
6873 | ||
6874 | #undef elf_backend_want_plt_sym | |
6875 | #define elf_backend_want_plt_sym 0 | |
6876 | ||
6877 | #include "elf64-target.h" | |
6878 | ||
6879 | /* FreeBSD K1OM support. */ | |
6880 | ||
6881 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6882 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
6883 | #undef TARGET_LITTLE_NAME |
6884 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
6885 | ||
6886 | #undef ELF_OSABI | |
6887 | #define ELF_OSABI ELFOSABI_FREEBSD | |
6888 | ||
6889 | #undef elf64_bed | |
6890 | #define elf64_bed elf64_k1om_fbsd_bed | |
6891 | ||
6892 | #include "elf64-target.h" | |
6893 | ||
351f65ca L |
6894 | /* 32bit x86-64 support. */ |
6895 | ||
351f65ca | 6896 | #undef TARGET_LITTLE_SYM |
6d00b590 | 6897 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
6898 | #undef TARGET_LITTLE_NAME |
6899 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 6900 | #undef elf32_bed |
351f65ca L |
6901 | |
6902 | #undef ELF_ARCH | |
6903 | #define ELF_ARCH bfd_arch_i386 | |
6904 | ||
6905 | #undef ELF_MACHINE_CODE | |
6906 | #define ELF_MACHINE_CODE EM_X86_64 | |
6907 | ||
351f65ca L |
6908 | #undef ELF_OSABI |
6909 | ||
351f65ca L |
6910 | #undef elf_backend_object_p |
6911 | #define elf_backend_object_p \ | |
6912 | elf32_x86_64_elf_object_p | |
6913 | ||
6914 | #undef elf_backend_bfd_from_remote_memory | |
6915 | #define elf_backend_bfd_from_remote_memory \ | |
6916 | _bfd_elf32_bfd_from_remote_memory | |
6917 | ||
6918 | #undef elf_backend_size_info | |
6919 | #define elf_backend_size_info \ | |
6920 | _bfd_elf32_size_info | |
6921 | ||
6922 | #include "elf32-target.h" |