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351f65ca | 1 | /* X86-64 specific support for ELF |
6f2750fe | 2 | Copyright (C) 2000-2016 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 | |
8d88c4ca | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
c434dee6 | 24 | #include "bfdlink.h" |
8d88c4ca NC |
25 | #include "libbfd.h" |
26 | #include "elf-bfd.h" | |
5a68afcf | 27 | #include "elf-nacl.h" |
142411ca | 28 | #include "bfd_stdint.h" |
c25bc9fc L |
29 | #include "objalloc.h" |
30 | #include "hashtab.h" | |
e41b3a13 | 31 | #include "dwarf2.h" |
d7921315 | 32 | #include "libiberty.h" |
8d88c4ca | 33 | |
56ceb5b5 | 34 | #include "opcode/i386.h" |
8d88c4ca NC |
35 | #include "elf/x86-64.h" |
36 | ||
8fd79e71 L |
37 | #ifdef CORE_HEADER |
38 | #include <stdarg.h> | |
39 | #include CORE_HEADER | |
40 | #endif | |
41 | ||
8d88c4ca NC |
42 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
43 | #define MINUS_ONE (~ (bfd_vma) 0) | |
44 | ||
351f65ca L |
45 | /* Since both 32-bit and 64-bit x86-64 encode relocation type in the |
46 | identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get | |
47 | relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE | |
48 | since they are the same. */ | |
49 | ||
50 | #define ABI_64_P(abfd) \ | |
51 | (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64) | |
52 | ||
8d88c4ca | 53 | /* The relocation "howto" table. Order of fields: |
7b81dfbb AJ |
54 | type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow, |
55 | special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */ | |
70256ad8 AJ |
56 | static reloc_howto_type x86_64_elf_howto_table[] = |
57 | { | |
6346d5ca | 58 | HOWTO(R_X86_64_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont, |
b34976b6 AM |
59 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, |
60 | FALSE), | |
61 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
62 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, | |
63 | FALSE), | |
64 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
65 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, | |
66 | TRUE), | |
67 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
68 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, | |
69 | FALSE), | |
70 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
71 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, | |
72 | TRUE), | |
73 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
74 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, | |
75 | FALSE), | |
76 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
77 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, | |
78 | MINUS_ONE, FALSE), | |
79 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
80 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, | |
81 | MINUS_ONE, FALSE), | |
82 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
83 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, | |
84 | MINUS_ONE, FALSE), | |
85 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
86 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, | |
87 | 0xffffffff, TRUE), | |
88 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, | |
89 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
90 | FALSE), | |
91 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
92 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, | |
93 | FALSE), | |
94 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
95 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), | |
b0360d8c | 96 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
b34976b6 | 97 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), |
ac2aa337 | 98 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
b34976b6 AM |
99 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), |
100 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
101 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), | |
102 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
103 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, | |
104 | MINUS_ONE, FALSE), | |
105 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
106 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, | |
107 | MINUS_ONE, FALSE), | |
108 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
109 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, | |
110 | MINUS_ONE, FALSE), | |
111 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
112 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, | |
113 | 0xffffffff, TRUE), | |
114 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
115 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, | |
116 | 0xffffffff, TRUE), | |
ac2aa337 | 117 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
b34976b6 AM |
118 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, |
119 | 0xffffffff, FALSE), | |
120 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
121 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, | |
122 | 0xffffffff, TRUE), | |
123 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
124 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, | |
125 | 0xffffffff, FALSE), | |
d6ab8113 JB |
126 | HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
127 | bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE, | |
128 | TRUE), | |
129 | HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
130 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", | |
131 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
132 | HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
133 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", | |
134 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
7b81dfbb AJ |
135 | HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, |
136 | bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE, | |
137 | FALSE), | |
138 | HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
139 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE, | |
140 | MINUS_ONE, TRUE), | |
141 | HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
142 | bfd_elf_generic_reloc, "R_X86_64_GOTPC64", | |
143 | FALSE, MINUS_ONE, MINUS_ONE, TRUE), | |
144 | HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
145 | bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE, | |
146 | MINUS_ONE, FALSE), | |
147 | HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
148 | bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE, | |
149 | MINUS_ONE, FALSE), | |
1788fc08 L |
150 | HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, |
151 | bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff, | |
152 | FALSE), | |
153 | HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned, | |
154 | bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE, | |
155 | FALSE), | |
67a4f2b7 AO |
156 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0, |
157 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
158 | "R_X86_64_GOTPC32_TLSDESC", | |
159 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
160 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0, | |
161 | complain_overflow_dont, bfd_elf_generic_reloc, | |
162 | "R_X86_64_TLSDESC_CALL", | |
163 | FALSE, 0, 0, FALSE), | |
164 | HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0, | |
165 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
166 | "R_X86_64_TLSDESC", | |
167 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
cbe950e9 L |
168 | HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
169 | bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE, | |
170 | MINUS_ONE, FALSE), | |
64d25c44 L |
171 | HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
172 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE, | |
173 | MINUS_ONE, FALSE), | |
c3320543 L |
174 | HOWTO(R_X86_64_PC32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
175 | bfd_elf_generic_reloc, "R_X86_64_PC32_BND", FALSE, 0xffffffff, 0xffffffff, | |
176 | TRUE), | |
177 | HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
178 | bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", FALSE, 0xffffffff, 0xffffffff, | |
179 | TRUE), | |
56ceb5b5 L |
180 | HOWTO(R_X86_64_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
181 | bfd_elf_generic_reloc, "R_X86_64_GOTPCRELX", FALSE, 0xffffffff, | |
182 | 0xffffffff, TRUE), | |
183 | HOWTO(R_X86_64_REX_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
184 | bfd_elf_generic_reloc, "R_X86_64_REX_GOTPCRELX", FALSE, 0xffffffff, | |
185 | 0xffffffff, TRUE), | |
fe4770f4 | 186 | |
a33d77bc JB |
187 | /* We have a gap in the reloc numbers here. |
188 | R_X86_64_standard counts the number up to this point, and | |
189 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
190 | R_X86_64_GNU_VT* to form an index into this table. */ | |
56ceb5b5 | 191 | #define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1) |
a33d77bc JB |
192 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
193 | ||
fe4770f4 | 194 | /* GNU extension to record C++ vtable hierarchy. */ |
b34976b6 AM |
195 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
196 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
197 | |
198 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
199 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
200 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
d7921315 L |
201 | FALSE), |
202 | ||
203 | /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */ | |
204 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
205 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
206 | FALSE) | |
8d88c4ca NC |
207 | }; |
208 | ||
d8045f23 NC |
209 | #define IS_X86_64_PCREL_TYPE(TYPE) \ |
210 | ( ((TYPE) == R_X86_64_PC8) \ | |
211 | || ((TYPE) == R_X86_64_PC16) \ | |
212 | || ((TYPE) == R_X86_64_PC32) \ | |
c3320543 | 213 | || ((TYPE) == R_X86_64_PC32_BND) \ |
d8045f23 NC |
214 | || ((TYPE) == R_X86_64_PC64)) |
215 | ||
8d88c4ca | 216 | /* Map BFD relocs to the x86_64 elf relocs. */ |
70256ad8 AJ |
217 | struct elf_reloc_map |
218 | { | |
8d88c4ca NC |
219 | bfd_reloc_code_real_type bfd_reloc_val; |
220 | unsigned char elf_reloc_val; | |
221 | }; | |
222 | ||
dc810e39 | 223 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 224 | { |
70256ad8 AJ |
225 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
226 | { BFD_RELOC_64, R_X86_64_64, }, | |
227 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
228 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
229 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
230 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
231 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
232 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
233 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
234 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
235 | { BFD_RELOC_32, R_X86_64_32, }, | |
236 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
237 | { BFD_RELOC_16, R_X86_64_16, }, | |
238 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
239 | { BFD_RELOC_8, R_X86_64_8, }, | |
240 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
241 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
242 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
243 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
244 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
245 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
246 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
247 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
248 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
249 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
250 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
251 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
252 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
253 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
254 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
255 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
256 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
1788fc08 L |
257 | { BFD_RELOC_SIZE32, R_X86_64_SIZE32, }, |
258 | { BFD_RELOC_SIZE64, R_X86_64_SIZE64, }, | |
67a4f2b7 AO |
259 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
260 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
261 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
cbe950e9 | 262 | { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, }, |
56ceb5b5 L |
263 | { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND, }, |
264 | { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND, }, | |
265 | { BFD_RELOC_X86_64_GOTPCRELX, R_X86_64_GOTPCRELX, }, | |
266 | { BFD_RELOC_X86_64_REX_GOTPCRELX, R_X86_64_REX_GOTPCRELX, }, | |
fe4770f4 AJ |
267 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
268 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
269 | }; |
270 | ||
67a4f2b7 | 271 | static reloc_howto_type * |
351f65ca | 272 | elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) |
67a4f2b7 AO |
273 | { |
274 | unsigned i; | |
275 | ||
d7921315 L |
276 | if (r_type == (unsigned int) R_X86_64_32) |
277 | { | |
278 | if (ABI_64_P (abfd)) | |
279 | i = r_type; | |
280 | else | |
281 | i = ARRAY_SIZE (x86_64_elf_howto_table) - 1; | |
282 | } | |
283 | else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
284 | || r_type >= (unsigned int) R_X86_64_max) | |
67a4f2b7 AO |
285 | { |
286 | if (r_type >= (unsigned int) R_X86_64_standard) | |
287 | { | |
288 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), | |
289 | abfd, (int) r_type); | |
290 | r_type = R_X86_64_NONE; | |
291 | } | |
292 | i = r_type; | |
293 | } | |
294 | else | |
295 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
296 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
297 | return &x86_64_elf_howto_table[i]; | |
298 | } | |
8d88c4ca NC |
299 | |
300 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
301 | static reloc_howto_type * | |
351f65ca L |
302 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
303 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
304 | { |
305 | unsigned int i; | |
27482721 | 306 | |
8d88c4ca NC |
307 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
308 | i++) | |
309 | { | |
310 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
311 | return elf_x86_64_rtype_to_howto (abfd, |
312 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca | 313 | } |
5860e3f8 | 314 | return NULL; |
8d88c4ca NC |
315 | } |
316 | ||
157090f7 | 317 | static reloc_howto_type * |
d7921315 | 318 | elf_x86_64_reloc_name_lookup (bfd *abfd, |
351f65ca | 319 | const char *r_name) |
157090f7 AM |
320 | { |
321 | unsigned int i; | |
322 | ||
d7921315 L |
323 | if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0) |
324 | { | |
325 | /* Get x32 R_X86_64_32. */ | |
326 | reloc_howto_type *reloc | |
327 | = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1]; | |
328 | BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32); | |
329 | return reloc; | |
330 | } | |
331 | ||
332 | for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++) | |
157090f7 AM |
333 | if (x86_64_elf_howto_table[i].name != NULL |
334 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
335 | return &x86_64_elf_howto_table[i]; | |
336 | ||
337 | return NULL; | |
338 | } | |
339 | ||
8d88c4ca | 340 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 341 | |
8d88c4ca | 342 | static void |
351f65ca L |
343 | elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
344 | Elf_Internal_Rela *dst) | |
8d88c4ca | 345 | { |
67a4f2b7 | 346 | unsigned r_type; |
8d88c4ca | 347 | |
351f65ca L |
348 | r_type = ELF32_R_TYPE (dst->r_info); |
349 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); | |
8d88c4ca NC |
350 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
351 | } | |
70256ad8 | 352 | \f |
3bab7989 | 353 | /* Support for core dump NOTE sections. */ |
b34976b6 | 354 | static bfd_boolean |
351f65ca | 355 | elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
356 | { |
357 | int offset; | |
eea6121a | 358 | size_t size; |
3bab7989 ML |
359 | |
360 | switch (note->descsz) | |
361 | { | |
362 | default: | |
b34976b6 | 363 | return FALSE; |
3bab7989 | 364 | |
bcd823f1 L |
365 | case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */ |
366 | /* pr_cursig */ | |
228e534f | 367 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
bcd823f1 L |
368 | |
369 | /* pr_pid */ | |
228e534f | 370 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
bcd823f1 L |
371 | |
372 | /* pr_reg */ | |
373 | offset = 72; | |
374 | size = 216; | |
375 | ||
376 | break; | |
377 | ||
3bab7989 ML |
378 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ |
379 | /* pr_cursig */ | |
228e534f | 380 | elf_tdata (abfd)->core->signal |
3bab7989 ML |
381 | = bfd_get_16 (abfd, note->descdata + 12); |
382 | ||
383 | /* pr_pid */ | |
228e534f | 384 | elf_tdata (abfd)->core->lwpid |
3bab7989 ML |
385 | = bfd_get_32 (abfd, note->descdata + 32); |
386 | ||
387 | /* pr_reg */ | |
388 | offset = 112; | |
eea6121a | 389 | size = 216; |
3bab7989 ML |
390 | |
391 | break; | |
392 | } | |
393 | ||
394 | /* Make a ".reg/999" section. */ | |
395 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 396 | size, note->descpos + offset); |
3bab7989 ML |
397 | } |
398 | ||
b34976b6 | 399 | static bfd_boolean |
351f65ca | 400 | elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
401 | { |
402 | switch (note->descsz) | |
403 | { | |
404 | default: | |
b34976b6 | 405 | return FALSE; |
3bab7989 | 406 | |
bcd823f1 | 407 | case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */ |
228e534f | 408 | elf_tdata (abfd)->core->pid |
bcd823f1 | 409 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 410 | elf_tdata (abfd)->core->program |
bcd823f1 | 411 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 412 | elf_tdata (abfd)->core->command |
bcd823f1 L |
413 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
414 | break; | |
415 | ||
3bab7989 | 416 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ |
228e534f | 417 | elf_tdata (abfd)->core->pid |
261b8d08 | 418 | = bfd_get_32 (abfd, note->descdata + 24); |
228e534f | 419 | elf_tdata (abfd)->core->program |
3bab7989 | 420 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
228e534f | 421 | elf_tdata (abfd)->core->command |
3bab7989 ML |
422 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
423 | } | |
424 | ||
425 | /* Note that for some reason, a spurious space is tacked | |
426 | onto the end of the args in some (at least one anyway) | |
427 | implementations, so strip it off if it exists. */ | |
428 | ||
429 | { | |
228e534f | 430 | char *command = elf_tdata (abfd)->core->command; |
3bab7989 ML |
431 | int n = strlen (command); |
432 | ||
433 | if (0 < n && command[n - 1] == ' ') | |
434 | command[n - 1] = '\0'; | |
435 | } | |
436 | ||
b34976b6 | 437 | return TRUE; |
3bab7989 | 438 | } |
8fd79e71 L |
439 | |
440 | #ifdef CORE_HEADER | |
441 | static char * | |
442 | elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz, | |
443 | int note_type, ...) | |
444 | { | |
445 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8fd79e71 L |
446 | va_list ap; |
447 | const char *fname, *psargs; | |
448 | long pid; | |
449 | int cursig; | |
450 | const void *gregs; | |
451 | ||
452 | switch (note_type) | |
453 | { | |
454 | default: | |
455 | return NULL; | |
456 | ||
457 | case NT_PRPSINFO: | |
458 | va_start (ap, note_type); | |
459 | fname = va_arg (ap, const char *); | |
460 | psargs = va_arg (ap, const char *); | |
461 | va_end (ap); | |
462 | ||
463 | if (bed->s->elfclass == ELFCLASS32) | |
464 | { | |
465 | prpsinfo32_t data; | |
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 L |
471 | } |
472 | else | |
473 | { | |
b1bd052d | 474 | prpsinfo64_t data; |
8fd79e71 L |
475 | memset (&data, 0, sizeof (data)); |
476 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
477 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
478 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
479 | &data, sizeof (data)); | |
8fd79e71 | 480 | } |
e85c6a70 | 481 | /* NOTREACHED */ |
8fd79e71 L |
482 | |
483 | case NT_PRSTATUS: | |
484 | va_start (ap, note_type); | |
485 | pid = va_arg (ap, long); | |
486 | cursig = va_arg (ap, int); | |
487 | gregs = va_arg (ap, const void *); | |
488 | va_end (ap); | |
489 | ||
490 | if (bed->s->elfclass == ELFCLASS32) | |
491 | { | |
492 | if (bed->elf_machine_code == EM_X86_64) | |
493 | { | |
494 | prstatusx32_t prstat; | |
495 | memset (&prstat, 0, sizeof (prstat)); | |
496 | prstat.pr_pid = pid; | |
497 | prstat.pr_cursig = cursig; | |
498 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
499 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
500 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
501 | } |
502 | else | |
503 | { | |
504 | prstatus32_t prstat; | |
505 | memset (&prstat, 0, sizeof (prstat)); | |
506 | prstat.pr_pid = pid; | |
507 | prstat.pr_cursig = cursig; | |
508 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
509 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
510 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
511 | } |
512 | } | |
513 | else | |
514 | { | |
b1bd052d | 515 | prstatus64_t prstat; |
8fd79e71 L |
516 | memset (&prstat, 0, sizeof (prstat)); |
517 | prstat.pr_pid = pid; | |
518 | prstat.pr_cursig = cursig; | |
519 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
520 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
521 | &prstat, sizeof (prstat)); | |
8fd79e71 | 522 | } |
8fd79e71 | 523 | } |
e85c6a70 | 524 | /* NOTREACHED */ |
8fd79e71 L |
525 | } |
526 | #endif | |
3bab7989 | 527 | \f |
407443a3 | 528 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 529 | |
407443a3 | 530 | /* The name of the dynamic interpreter. This is put in the .interp |
70256ad8 AJ |
531 | section. */ |
532 | ||
351f65ca | 533 | #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
eec9dd95 | 534 | #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1" |
70256ad8 | 535 | |
d40d037c AJ |
536 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
537 | copying dynamic variables from a shared lib into an app's dynbss | |
538 | section, and instead use a dynamic relocation to point into the | |
539 | shared lib. */ | |
540 | #define ELIMINATE_COPY_RELOCS 1 | |
541 | ||
70256ad8 AJ |
542 | /* The size in bytes of an entry in the global offset table. */ |
543 | ||
544 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 545 | |
70256ad8 | 546 | /* The size in bytes of an entry in the procedure linkage table. */ |
8d88c4ca | 547 | |
70256ad8 AJ |
548 | #define PLT_ENTRY_SIZE 16 |
549 | ||
550 | /* The first entry in a procedure linkage table looks like this. See the | |
551 | SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */ | |
552 | ||
351f65ca | 553 | static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] = |
70256ad8 | 554 | { |
653165cc AJ |
555 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
556 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 557 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
558 | }; |
559 | ||
560 | /* Subsequent entries in a procedure linkage table look like this. */ | |
561 | ||
351f65ca | 562 | static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] = |
70256ad8 | 563 | { |
653165cc | 564 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 565 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 566 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
567 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
568 | 0xe9, /* jmp relative */ | |
569 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
570 | }; | |
571 | ||
0ff2b86e L |
572 | /* The first entry in a procedure linkage table with BND relocations |
573 | like this. */ | |
574 | ||
575 | static const bfd_byte elf_x86_64_bnd_plt0_entry[PLT_ENTRY_SIZE] = | |
576 | { | |
577 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
578 | 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */ | |
579 | 0x0f, 0x1f, 0 /* nopl (%rax) */ | |
580 | }; | |
581 | ||
582 | /* Subsequent entries for legacy branches in a procedure linkage table | |
583 | with BND relocations look like this. */ | |
584 | ||
585 | static const bfd_byte elf_x86_64_legacy_plt_entry[PLT_ENTRY_SIZE] = | |
586 | { | |
587 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
588 | 0xe9, 0, 0, 0, 0, /* jmpq relative */ | |
589 | 0x66, 0x0f, 0x1f, 0x44, 0, 0 /* nopw (%rax,%rax,1) */ | |
590 | }; | |
591 | ||
592 | /* Subsequent entries for branches with BND prefx in a procedure linkage | |
593 | table with BND relocations look like this. */ | |
594 | ||
595 | static const bfd_byte elf_x86_64_bnd_plt_entry[PLT_ENTRY_SIZE] = | |
596 | { | |
597 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
598 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
599 | 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */ | |
600 | }; | |
601 | ||
602 | /* Entries for legacy branches in the second procedure linkage table | |
603 | look like this. */ | |
604 | ||
605 | static const bfd_byte elf_x86_64_legacy_plt2_entry[8] = | |
606 | { | |
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 */ | |
610 | }; | |
611 | ||
612 | /* Entries for branches with BND prefix in the second procedure linkage | |
613 | table look like this. */ | |
614 | ||
615 | static const bfd_byte elf_x86_64_bnd_plt2_entry[8] = | |
616 | { | |
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 */ | |
620 | }; | |
621 | ||
e41b3a13 JJ |
622 | /* .eh_frame covering the .plt section. */ |
623 | ||
624 | static const bfd_byte elf_x86_64_eh_frame_plt[] = | |
625 | { | |
626 | #define PLT_CIE_LENGTH 20 | |
627 | #define PLT_FDE_LENGTH 36 | |
628 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
629 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
630 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
631 | 0, 0, 0, 0, /* CIE ID */ | |
632 | 1, /* CIE version */ | |
633 | 'z', 'R', 0, /* Augmentation string */ | |
634 | 1, /* Code alignment factor */ | |
635 | 0x78, /* Data alignment factor */ | |
636 | 16, /* Return address column */ | |
637 | 1, /* Augmentation size */ | |
638 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
639 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
640 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
641 | DW_CFA_nop, DW_CFA_nop, | |
642 | ||
643 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
644 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
645 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
646 | 0, 0, 0, 0, /* .plt size goes here */ | |
647 | 0, /* Augmentation size */ | |
648 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
649 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
650 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
651 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
652 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
653 | 11, /* Block length */ | |
654 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
655 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
656 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
657 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
658 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
659 | }; | |
660 | ||
eed180f8 RM |
661 | /* Architecture-specific backend data for x86-64. */ |
662 | ||
663 | struct elf_x86_64_backend_data | |
664 | { | |
665 | /* Templates for the initial PLT entry and for subsequent entries. */ | |
666 | const bfd_byte *plt0_entry; | |
667 | const bfd_byte *plt_entry; | |
668 | unsigned int plt_entry_size; /* Size of each PLT entry. */ | |
669 | ||
670 | /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */ | |
671 | unsigned int plt0_got1_offset; | |
672 | unsigned int plt0_got2_offset; | |
673 | ||
674 | /* Offset of the end of the PC-relative instruction containing | |
675 | plt0_got2_offset. */ | |
676 | unsigned int plt0_got2_insn_end; | |
677 | ||
678 | /* Offsets into plt_entry that are to be replaced with... */ | |
679 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
680 | unsigned int plt_reloc_offset; /* ... offset into relocation table. */ | |
681 | unsigned int plt_plt_offset; /* ... offset to start of .plt. */ | |
682 | ||
683 | /* Length of the PC-relative instruction containing plt_got_offset. */ | |
684 | unsigned int plt_got_insn_size; | |
685 | ||
686 | /* Offset of the end of the PC-relative jump to plt0_entry. */ | |
687 | unsigned int plt_plt_insn_end; | |
688 | ||
689 | /* Offset into plt_entry where the initial value of the GOT entry points. */ | |
690 | unsigned int plt_lazy_offset; | |
691 | ||
692 | /* .eh_frame covering the .plt section. */ | |
693 | const bfd_byte *eh_frame_plt; | |
694 | unsigned int eh_frame_plt_size; | |
695 | }; | |
696 | ||
f8222080 L |
697 | #define get_elf_x86_64_arch_data(bed) \ |
698 | ((const struct elf_x86_64_backend_data *) (bed)->arch_data) | |
699 | ||
eed180f8 | 700 | #define get_elf_x86_64_backend_data(abfd) \ |
f8222080 | 701 | get_elf_x86_64_arch_data (get_elf_backend_data (abfd)) |
eed180f8 RM |
702 | |
703 | #define GET_PLT_ENTRY_SIZE(abfd) \ | |
704 | get_elf_x86_64_backend_data (abfd)->plt_entry_size | |
705 | ||
706 | /* These are the standard parameters. */ | |
707 | static const struct elf_x86_64_backend_data elf_x86_64_arch_bed = | |
708 | { | |
709 | elf_x86_64_plt0_entry, /* plt0_entry */ | |
710 | elf_x86_64_plt_entry, /* plt_entry */ | |
711 | sizeof (elf_x86_64_plt_entry), /* plt_entry_size */ | |
712 | 2, /* plt0_got1_offset */ | |
713 | 8, /* plt0_got2_offset */ | |
714 | 12, /* plt0_got2_insn_end */ | |
715 | 2, /* plt_got_offset */ | |
716 | 7, /* plt_reloc_offset */ | |
717 | 12, /* plt_plt_offset */ | |
718 | 6, /* plt_got_insn_size */ | |
719 | PLT_ENTRY_SIZE, /* plt_plt_insn_end */ | |
720 | 6, /* plt_lazy_offset */ | |
721 | elf_x86_64_eh_frame_plt, /* eh_frame_plt */ | |
722 | sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */ | |
723 | }; | |
724 | ||
0ff2b86e L |
725 | static const struct elf_x86_64_backend_data elf_x86_64_bnd_arch_bed = |
726 | { | |
727 | elf_x86_64_bnd_plt0_entry, /* plt0_entry */ | |
728 | elf_x86_64_bnd_plt_entry, /* plt_entry */ | |
729 | sizeof (elf_x86_64_bnd_plt_entry), /* plt_entry_size */ | |
730 | 2, /* plt0_got1_offset */ | |
731 | 1+8, /* plt0_got2_offset */ | |
732 | 1+12, /* plt0_got2_insn_end */ | |
733 | 1+2, /* plt_got_offset */ | |
734 | 1, /* plt_reloc_offset */ | |
735 | 7, /* plt_plt_offset */ | |
736 | 1+6, /* plt_got_insn_size */ | |
737 | 11, /* plt_plt_insn_end */ | |
738 | 0, /* plt_lazy_offset */ | |
739 | elf_x86_64_eh_frame_plt, /* eh_frame_plt */ | |
740 | sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */ | |
741 | }; | |
742 | ||
eed180f8 RM |
743 | #define elf_backend_arch_data &elf_x86_64_arch_bed |
744 | ||
aec6b87e L |
745 | /* Is a undefined weak symbol which is resolved to 0. Reference to an |
746 | undefined weak symbol is resolved to 0 when building executable if | |
747 | it isn't dynamic and | |
748 | 1. Has non-GOT/non-PLT relocations in text section. Or | |
749 | 2. Has no GOT/PLT relocation. | |
750 | */ | |
e62b9723 | 751 | #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \ |
aec6b87e L |
752 | ((EH)->elf.root.type == bfd_link_hash_undefweak \ |
753 | && bfd_link_executable (INFO) \ | |
754 | && (elf_x86_64_hash_table (INFO)->interp == NULL \ | |
e62b9723 | 755 | || !(GOT_RELOC) \ |
aec6b87e L |
756 | || (EH)->has_non_got_reloc \ |
757 | || !(INFO)->dynamic_undefined_weak)) | |
758 | ||
70256ad8 AJ |
759 | /* x86-64 ELF linker hash entry. */ |
760 | ||
351f65ca | 761 | struct elf_x86_64_link_hash_entry |
70256ad8 | 762 | { |
c434dee6 | 763 | struct elf_link_hash_entry elf; |
70256ad8 | 764 | |
c434dee6 | 765 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 766 | struct elf_dyn_relocs *dyn_relocs; |
bffbf940 JJ |
767 | |
768 | #define GOT_UNKNOWN 0 | |
769 | #define GOT_NORMAL 1 | |
770 | #define GOT_TLS_GD 2 | |
771 | #define GOT_TLS_IE 3 | |
67a4f2b7 AO |
772 | #define GOT_TLS_GDESC 4 |
773 | #define GOT_TLS_GD_BOTH_P(type) \ | |
774 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
775 | #define GOT_TLS_GD_P(type) \ | |
776 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
777 | #define GOT_TLS_GDESC_P(type) \ | |
778 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
779 | #define GOT_TLS_GD_ANY_P(type) \ | |
780 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
bffbf940 | 781 | unsigned char tls_type; |
67a4f2b7 | 782 | |
bc696fd5 L |
783 | /* TRUE if a weak symbol with a real definition needs a copy reloc. |
784 | When there is a weak symbol with a real definition, the processor | |
785 | independent code will have arranged for us to see the real | |
786 | definition first. We need to copy the needs_copy bit from the | |
787 | real definition and check it when allowing copy reloc in PIE. */ | |
788 | unsigned int needs_copy : 1; | |
789 | ||
0ff2b86e | 790 | /* TRUE if symbol has at least one BND relocation. */ |
bc696fd5 | 791 | unsigned int has_bnd_reloc : 1; |
0ff2b86e | 792 | |
aec6b87e L |
793 | /* TRUE if symbol has GOT or PLT relocations. */ |
794 | unsigned int has_got_reloc : 1; | |
795 | ||
796 | /* TRUE if symbol has non-GOT/non-PLT relocations in text sections. */ | |
797 | unsigned int has_non_got_reloc : 1; | |
798 | ||
04ebc307 L |
799 | /* Reference count of C/C++ function pointer relocations in read-write |
800 | section which can be resolved at run-time. */ | |
801 | bfd_signed_vma func_pointer_refcount; | |
802 | ||
dd7e64d4 L |
803 | /* Information about the GOT PLT entry. Filled when there are both |
804 | GOT and PLT relocations against the same function. */ | |
805 | union gotplt_union plt_got; | |
806 | ||
0ff2b86e L |
807 | /* Information about the second PLT entry. Filled when has_bnd_reloc is |
808 | set. */ | |
809 | union gotplt_union plt_bnd; | |
810 | ||
67a4f2b7 AO |
811 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, |
812 | starting at the end of the jump table. */ | |
813 | bfd_vma tlsdesc_got; | |
bffbf940 JJ |
814 | }; |
815 | ||
351f65ca L |
816 | #define elf_x86_64_hash_entry(ent) \ |
817 | ((struct elf_x86_64_link_hash_entry *)(ent)) | |
bffbf940 | 818 | |
351f65ca | 819 | struct elf_x86_64_obj_tdata |
bffbf940 JJ |
820 | { |
821 | struct elf_obj_tdata root; | |
822 | ||
823 | /* tls_type for each local got entry. */ | |
824 | char *local_got_tls_type; | |
67a4f2b7 AO |
825 | |
826 | /* GOTPLT entries for TLS descriptors. */ | |
827 | bfd_vma *local_tlsdesc_gotent; | |
70256ad8 AJ |
828 | }; |
829 | ||
351f65ca L |
830 | #define elf_x86_64_tdata(abfd) \ |
831 | ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any) | |
bffbf940 | 832 | |
351f65ca L |
833 | #define elf_x86_64_local_got_tls_type(abfd) \ |
834 | (elf_x86_64_tdata (abfd)->local_got_tls_type) | |
bffbf940 | 835 | |
351f65ca L |
836 | #define elf_x86_64_local_tlsdesc_gotent(abfd) \ |
837 | (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent) | |
bffbf940 | 838 | |
0ffa91dd NC |
839 | #define is_x86_64_elf(bfd) \ |
840 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
841 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 842 | && elf_object_id (bfd) == X86_64_ELF_DATA) |
0ffa91dd NC |
843 | |
844 | static bfd_boolean | |
351f65ca | 845 | elf_x86_64_mkobject (bfd *abfd) |
0ffa91dd | 846 | { |
351f65ca | 847 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata), |
4dfe6ac6 | 848 | X86_64_ELF_DATA); |
0ffa91dd NC |
849 | } |
850 | ||
c434dee6 | 851 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 852 | |
351f65ca | 853 | struct elf_x86_64_link_hash_table |
407443a3 | 854 | { |
c434dee6 | 855 | struct elf_link_hash_table elf; |
70256ad8 | 856 | |
c434dee6 | 857 | /* Short-cuts to get to dynamic linker sections. */ |
aec6b87e | 858 | asection *interp; |
c434dee6 AJ |
859 | asection *sdynbss; |
860 | asection *srelbss; | |
e41b3a13 | 861 | asection *plt_eh_frame; |
0ff2b86e | 862 | asection *plt_bnd; |
dd7e64d4 | 863 | asection *plt_got; |
70256ad8 | 864 | |
4dfe6ac6 NC |
865 | union |
866 | { | |
bffbf940 JJ |
867 | bfd_signed_vma refcount; |
868 | bfd_vma offset; | |
869 | } tls_ld_got; | |
870 | ||
67a4f2b7 AO |
871 | /* The amount of space used by the jump slots in the GOT. */ |
872 | bfd_vma sgotplt_jump_table_size; | |
873 | ||
87d72d41 AM |
874 | /* Small local sym cache. */ |
875 | struct sym_cache sym_cache; | |
9f03412a | 876 | |
351f65ca L |
877 | bfd_vma (*r_info) (bfd_vma, bfd_vma); |
878 | bfd_vma (*r_sym) (bfd_vma); | |
248775ba | 879 | unsigned int pointer_r_type; |
351f65ca L |
880 | const char *dynamic_interpreter; |
881 | int dynamic_interpreter_size; | |
882 | ||
9f03412a AO |
883 | /* _TLS_MODULE_BASE_ symbol. */ |
884 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
885 | |
886 | /* Used by local STT_GNU_IFUNC symbols. */ | |
887 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
888 | void * loc_hash_memory; |
889 | ||
890 | /* The offset into splt of the PLT entry for the TLS descriptor | |
891 | resolver. Special values are 0, if not necessary (or not found | |
892 | to be necessary yet), and -1 if needed but not determined | |
893 | yet. */ | |
894 | bfd_vma tlsdesc_plt; | |
895 | /* The offset into sgot of the GOT entry used by the PLT entry | |
896 | above. */ | |
897 | bfd_vma tlsdesc_got; | |
e1f98742 L |
898 | |
899 | /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */ | |
900 | bfd_vma next_jump_slot_index; | |
901 | /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */ | |
902 | bfd_vma next_irelative_index; | |
2df3368d L |
903 | |
904 | /* TRUE if there are dynamic relocs against IFUNC symbols that apply | |
905 | to read-only sections. */ | |
906 | bfd_boolean readonly_dynrelocs_against_ifunc; | |
c434dee6 | 907 | }; |
70256ad8 AJ |
908 | |
909 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca | 910 | |
351f65ca | 911 | #define elf_x86_64_hash_table(p) \ |
4dfe6ac6 | 912 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
351f65ca | 913 | == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL) |
8d88c4ca | 914 | |
351f65ca | 915 | #define elf_x86_64_compute_jump_table_size(htab) \ |
6de2ae4a | 916 | ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE) |
67a4f2b7 | 917 | |
407443a3 | 918 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
919 | |
920 | static struct bfd_hash_entry * | |
351f65ca L |
921 | elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry, |
922 | struct bfd_hash_table *table, | |
923 | const char *string) | |
70256ad8 | 924 | { |
70256ad8 | 925 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
926 | subclass. */ |
927 | if (entry == NULL) | |
928 | { | |
a50b1753 | 929 | entry = (struct bfd_hash_entry *) |
eed180f8 RM |
930 | bfd_hash_allocate (table, |
931 | sizeof (struct elf_x86_64_link_hash_entry)); | |
c434dee6 AJ |
932 | if (entry == NULL) |
933 | return entry; | |
934 | } | |
70256ad8 AJ |
935 | |
936 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
937 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
938 | if (entry != NULL) | |
70256ad8 | 939 | { |
351f65ca | 940 | struct elf_x86_64_link_hash_entry *eh; |
c434dee6 | 941 | |
351f65ca | 942 | eh = (struct elf_x86_64_link_hash_entry *) entry; |
c434dee6 | 943 | eh->dyn_relocs = NULL; |
bffbf940 | 944 | eh->tls_type = GOT_UNKNOWN; |
bc696fd5 L |
945 | eh->needs_copy = 0; |
946 | eh->has_bnd_reloc = 0; | |
aec6b87e L |
947 | eh->has_got_reloc = 0; |
948 | eh->has_non_got_reloc = 0; | |
04ebc307 | 949 | eh->func_pointer_refcount = 0; |
0ff2b86e | 950 | eh->plt_bnd.offset = (bfd_vma) -1; |
dd7e64d4 | 951 | eh->plt_got.offset = (bfd_vma) -1; |
67a4f2b7 | 952 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
953 | } |
954 | ||
c434dee6 | 955 | return entry; |
70256ad8 AJ |
956 | } |
957 | ||
c25bc9fc L |
958 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
959 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
960 | as global symbol. We reuse indx and dynstr_index for local symbol | |
961 | hash since they aren't used by global symbols in this backend. */ | |
962 | ||
963 | static hashval_t | |
351f65ca | 964 | elf_x86_64_local_htab_hash (const void *ptr) |
c25bc9fc L |
965 | { |
966 | struct elf_link_hash_entry *h | |
967 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 968 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
969 | } |
970 | ||
971 | /* Compare local hash entries. */ | |
972 | ||
973 | static int | |
351f65ca | 974 | elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2) |
c25bc9fc L |
975 | { |
976 | struct elf_link_hash_entry *h1 | |
977 | = (struct elf_link_hash_entry *) ptr1; | |
978 | struct elf_link_hash_entry *h2 | |
979 | = (struct elf_link_hash_entry *) ptr2; | |
980 | ||
981 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
982 | } | |
983 | ||
984 | /* Find and/or create a hash entry for local symbol. */ | |
985 | ||
986 | static struct elf_link_hash_entry * | |
351f65ca L |
987 | elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab, |
988 | bfd *abfd, const Elf_Internal_Rela *rel, | |
989 | bfd_boolean create) | |
c25bc9fc | 990 | { |
351f65ca | 991 | struct elf_x86_64_link_hash_entry e, *ret; |
c25bc9fc | 992 | asection *sec = abfd->sections; |
d2149d72 | 993 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
351f65ca | 994 | htab->r_sym (rel->r_info)); |
c25bc9fc L |
995 | void **slot; |
996 | ||
997 | e.elf.indx = sec->id; | |
351f65ca | 998 | e.elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc L |
999 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, |
1000 | create ? INSERT : NO_INSERT); | |
1001 | ||
1002 | if (!slot) | |
1003 | return NULL; | |
1004 | ||
1005 | if (*slot) | |
1006 | { | |
351f65ca | 1007 | ret = (struct elf_x86_64_link_hash_entry *) *slot; |
c25bc9fc L |
1008 | return &ret->elf; |
1009 | } | |
1010 | ||
351f65ca | 1011 | ret = (struct elf_x86_64_link_hash_entry *) |
c25bc9fc | 1012 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, |
351f65ca | 1013 | sizeof (struct elf_x86_64_link_hash_entry)); |
c25bc9fc L |
1014 | if (ret) |
1015 | { | |
1016 | memset (ret, 0, sizeof (*ret)); | |
1017 | ret->elf.indx = sec->id; | |
351f65ca | 1018 | ret->elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc | 1019 | ret->elf.dynindx = -1; |
04ebc307 | 1020 | ret->func_pointer_refcount = 0; |
dd7e64d4 | 1021 | ret->plt_got.offset = (bfd_vma) -1; |
c25bc9fc L |
1022 | *slot = ret; |
1023 | } | |
1024 | return &ret->elf; | |
1025 | } | |
1026 | ||
68faa637 AM |
1027 | /* Destroy an X86-64 ELF linker hash table. */ |
1028 | ||
1029 | static void | |
d495ab0d | 1030 | elf_x86_64_link_hash_table_free (bfd *obfd) |
68faa637 AM |
1031 | { |
1032 | struct elf_x86_64_link_hash_table *htab | |
d495ab0d | 1033 | = (struct elf_x86_64_link_hash_table *) obfd->link.hash; |
68faa637 AM |
1034 | |
1035 | if (htab->loc_hash_table) | |
1036 | htab_delete (htab->loc_hash_table); | |
1037 | if (htab->loc_hash_memory) | |
1038 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
d495ab0d | 1039 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
1040 | } |
1041 | ||
8d88c4ca NC |
1042 | /* Create an X86-64 ELF linker hash table. */ |
1043 | ||
1044 | static struct bfd_link_hash_table * | |
351f65ca | 1045 | elf_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca | 1046 | { |
351f65ca L |
1047 | struct elf_x86_64_link_hash_table *ret; |
1048 | bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table); | |
8d88c4ca | 1049 | |
7bf52ea2 | 1050 | ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt); |
c434dee6 | 1051 | if (ret == NULL) |
8d88c4ca NC |
1052 | return NULL; |
1053 | ||
eb4ff4d6 | 1054 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
351f65ca L |
1055 | elf_x86_64_link_hash_newfunc, |
1056 | sizeof (struct elf_x86_64_link_hash_entry), | |
4dfe6ac6 | 1057 | X86_64_ELF_DATA)) |
8d88c4ca | 1058 | { |
e2d34d7d | 1059 | free (ret); |
8d88c4ca NC |
1060 | return NULL; |
1061 | } | |
1062 | ||
351f65ca L |
1063 | if (ABI_64_P (abfd)) |
1064 | { | |
1065 | ret->r_info = elf64_r_info; | |
1066 | ret->r_sym = elf64_r_sym; | |
248775ba | 1067 | ret->pointer_r_type = R_X86_64_64; |
351f65ca L |
1068 | ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; |
1069 | ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; | |
1070 | } | |
1071 | else | |
1072 | { | |
1073 | ret->r_info = elf32_r_info; | |
1074 | ret->r_sym = elf32_r_sym; | |
248775ba | 1075 | ret->pointer_r_type = R_X86_64_32; |
351f65ca L |
1076 | ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; |
1077 | ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER; | |
1078 | } | |
1079 | ||
c25bc9fc | 1080 | ret->loc_hash_table = htab_try_create (1024, |
351f65ca L |
1081 | elf_x86_64_local_htab_hash, |
1082 | elf_x86_64_local_htab_eq, | |
c25bc9fc L |
1083 | NULL); |
1084 | ret->loc_hash_memory = objalloc_create (); | |
1085 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
1086 | { | |
d495ab0d | 1087 | elf_x86_64_link_hash_table_free (abfd); |
c25bc9fc L |
1088 | return NULL; |
1089 | } | |
d495ab0d | 1090 | ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free; |
c25bc9fc | 1091 | |
c434dee6 AJ |
1092 | return &ret->elf.root; |
1093 | } | |
1094 | ||
c434dee6 AJ |
1095 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
1096 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
1097 | hash table. */ | |
1098 | ||
b34976b6 | 1099 | static bfd_boolean |
351f65ca L |
1100 | elf_x86_64_create_dynamic_sections (bfd *dynobj, |
1101 | struct bfd_link_info *info) | |
c434dee6 | 1102 | { |
351f65ca | 1103 | struct elf_x86_64_link_hash_table *htab; |
c434dee6 | 1104 | |
c434dee6 | 1105 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 1106 | return FALSE; |
c434dee6 | 1107 | |
351f65ca | 1108 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1109 | if (htab == NULL) |
1110 | return FALSE; | |
1111 | ||
493f652c L |
1112 | /* Set the contents of the .interp section to the interpreter. */ |
1113 | if (bfd_link_executable (info) && !info->nointerp) | |
1114 | { | |
1115 | asection *s = bfd_get_linker_section (dynobj, ".interp"); | |
1116 | if (s == NULL) | |
1117 | abort (); | |
1118 | s->size = htab->dynamic_interpreter_size; | |
1119 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
1120 | htab->interp = s; | |
1121 | } | |
1122 | ||
3d4d4302 | 1123 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
9a926d55 | 1124 | if (!htab->sdynbss) |
c434dee6 AJ |
1125 | abort (); |
1126 | ||
0e1862bb | 1127 | if (bfd_link_executable (info)) |
9a926d55 L |
1128 | { |
1129 | /* Always allow copy relocs for building executables. */ | |
9d157cb9 | 1130 | asection *s = bfd_get_linker_section (dynobj, ".rela.bss"); |
9a926d55 L |
1131 | if (s == NULL) |
1132 | { | |
1133 | const struct elf_backend_data *bed = get_elf_backend_data (dynobj); | |
1134 | s = bfd_make_section_anyway_with_flags (dynobj, | |
1135 | ".rela.bss", | |
1136 | (bed->dynamic_sec_flags | |
1137 | | SEC_READONLY)); | |
1138 | if (s == NULL | |
1139 | || ! bfd_set_section_alignment (dynobj, s, | |
1140 | bed->s->log_file_align)) | |
1141 | return FALSE; | |
1142 | } | |
1143 | htab->srelbss = s; | |
1144 | } | |
1145 | ||
e41b3a13 | 1146 | if (!info->no_ld_generated_unwind_info |
2fe0fd06 | 1147 | && htab->plt_eh_frame == NULL |
e4de50d4 | 1148 | && htab->elf.splt != NULL) |
e41b3a13 | 1149 | { |
bbf96e4e L |
1150 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
1151 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1152 | | SEC_LINKER_CREATED); | |
e41b3a13 | 1153 | htab->plt_eh_frame |
bbf96e4e | 1154 | = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags); |
e41b3a13 JJ |
1155 | if (htab->plt_eh_frame == NULL |
1156 | || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3)) | |
1157 | return FALSE; | |
e41b3a13 | 1158 | } |
b34976b6 | 1159 | return TRUE; |
c434dee6 AJ |
1160 | } |
1161 | ||
1162 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
1163 | ||
1164 | static void | |
351f65ca L |
1165 | elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
1166 | struct elf_link_hash_entry *dir, | |
1167 | struct elf_link_hash_entry *ind) | |
c434dee6 | 1168 | { |
351f65ca | 1169 | struct elf_x86_64_link_hash_entry *edir, *eind; |
c434dee6 | 1170 | |
351f65ca L |
1171 | edir = (struct elf_x86_64_link_hash_entry *) dir; |
1172 | eind = (struct elf_x86_64_link_hash_entry *) ind; | |
c434dee6 | 1173 | |
0ff2b86e L |
1174 | if (!edir->has_bnd_reloc) |
1175 | edir->has_bnd_reloc = eind->has_bnd_reloc; | |
1176 | ||
aec6b87e L |
1177 | if (!edir->has_got_reloc) |
1178 | edir->has_got_reloc = eind->has_got_reloc; | |
1179 | ||
1180 | if (!edir->has_non_got_reloc) | |
1181 | edir->has_non_got_reloc = eind->has_non_got_reloc; | |
1182 | ||
c434dee6 AJ |
1183 | if (eind->dyn_relocs != NULL) |
1184 | { | |
1185 | if (edir->dyn_relocs != NULL) | |
1186 | { | |
e03a8ed8 L |
1187 | struct elf_dyn_relocs **pp; |
1188 | struct elf_dyn_relocs *p; | |
c434dee6 | 1189 | |
fcfa13d2 | 1190 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
1191 | list. Merge any entries against the same section. */ |
1192 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1193 | { | |
e03a8ed8 | 1194 | struct elf_dyn_relocs *q; |
c434dee6 AJ |
1195 | |
1196 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1197 | if (q->sec == p->sec) | |
1198 | { | |
1199 | q->pc_count += p->pc_count; | |
1200 | q->count += p->count; | |
1201 | *pp = p->next; | |
1202 | break; | |
1203 | } | |
1204 | if (q == NULL) | |
1205 | pp = &p->next; | |
1206 | } | |
1207 | *pp = edir->dyn_relocs; | |
1208 | } | |
1209 | ||
1210 | edir->dyn_relocs = eind->dyn_relocs; | |
1211 | eind->dyn_relocs = NULL; | |
1212 | } | |
1213 | ||
bffbf940 JJ |
1214 | if (ind->root.type == bfd_link_hash_indirect |
1215 | && dir->got.refcount <= 0) | |
1216 | { | |
1217 | edir->tls_type = eind->tls_type; | |
1218 | eind->tls_type = GOT_UNKNOWN; | |
1219 | } | |
1220 | ||
d40d037c AJ |
1221 | if (ELIMINATE_COPY_RELOCS |
1222 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1223 | && dir->dynamic_adjusted) |
1224 | { | |
1225 | /* If called to transfer flags for a weakdef during processing | |
1226 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1227 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
1228 | dir->ref_dynamic |= ind->ref_dynamic; | |
1229 | dir->ref_regular |= ind->ref_regular; | |
1230 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1231 | dir->needs_plt |= ind->needs_plt; | |
1232 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1233 | } | |
d40d037c | 1234 | else |
04ebc307 L |
1235 | { |
1236 | if (eind->func_pointer_refcount > 0) | |
1237 | { | |
1238 | edir->func_pointer_refcount += eind->func_pointer_refcount; | |
1239 | eind->func_pointer_refcount = 0; | |
1240 | } | |
1241 | ||
1242 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
1243 | } | |
8d88c4ca NC |
1244 | } |
1245 | ||
b34976b6 | 1246 | static bfd_boolean |
27482721 | 1247 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 1248 | { |
8d88c4ca NC |
1249 | /* Set the right machine number for an x86-64 elf64 file. */ |
1250 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 1251 | return TRUE; |
8d88c4ca NC |
1252 | } |
1253 | ||
8059fb19 RM |
1254 | static bfd_boolean |
1255 | elf32_x86_64_elf_object_p (bfd *abfd) | |
1256 | { | |
1257 | /* Set the right machine number for an x86-64 elf32 file. */ | |
1258 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
1259 | return TRUE; | |
1260 | } | |
1261 | ||
142411ca L |
1262 | /* Return TRUE if the TLS access code sequence support transition |
1263 | from R_TYPE. */ | |
1264 | ||
1265 | static bfd_boolean | |
351f65ca L |
1266 | elf_x86_64_check_tls_transition (bfd *abfd, |
1267 | struct bfd_link_info *info, | |
1268 | asection *sec, | |
1269 | bfd_byte *contents, | |
1270 | Elf_Internal_Shdr *symtab_hdr, | |
1271 | struct elf_link_hash_entry **sym_hashes, | |
1272 | unsigned int r_type, | |
1273 | const Elf_Internal_Rela *rel, | |
1274 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1275 | { |
142411ca L |
1276 | unsigned int val; |
1277 | unsigned long r_symndx; | |
5c98a14e | 1278 | bfd_boolean largepic = FALSE; |
142411ca L |
1279 | struct elf_link_hash_entry *h; |
1280 | bfd_vma offset; | |
351f65ca | 1281 | struct elf_x86_64_link_hash_table *htab; |
142411ca | 1282 | |
351f65ca | 1283 | htab = elf_x86_64_hash_table (info); |
142411ca | 1284 | offset = rel->r_offset; |
bffbf940 | 1285 | switch (r_type) |
142411ca L |
1286 | { |
1287 | case R_X86_64_TLSGD: | |
1288 | case R_X86_64_TLSLD: | |
1289 | if ((rel + 1) >= relend) | |
1290 | return FALSE; | |
1291 | ||
1292 | if (r_type == R_X86_64_TLSGD) | |
1293 | { | |
52bc799a | 1294 | /* Check transition from GD access model. For 64bit, only |
142411ca L |
1295 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
1296 | .word 0x6666; rex64; call __tls_get_addr | |
52bc799a L |
1297 | can transit to different access model. For 32bit, only |
1298 | leaq foo@tlsgd(%rip), %rdi | |
1299 | .word 0x6666; rex64; call __tls_get_addr | |
5c98a14e JJ |
1300 | can transit to different access model. For largepic |
1301 | we also support: | |
1302 | leaq foo@tlsgd(%rip), %rdi | |
1303 | movabsq $__tls_get_addr@pltoff, %rax | |
1304 | addq $rbx, %rax | |
1305 | call *%rax. */ | |
142411ca | 1306 | |
fa289a5f AM |
1307 | static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 }; |
1308 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; | |
1309 | ||
5c98a14e | 1310 | if ((offset + 12) > sec->size) |
142411ca | 1311 | return FALSE; |
52bc799a | 1312 | |
5c98a14e JJ |
1313 | if (memcmp (contents + offset + 4, call, 4) != 0) |
1314 | { | |
1315 | if (!ABI_64_P (abfd) | |
1316 | || (offset + 19) > sec->size | |
1317 | || offset < 3 | |
1318 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0 | |
1319 | || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0 | |
1320 | || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5) | |
1321 | != 0) | |
1322 | return FALSE; | |
1323 | largepic = TRUE; | |
1324 | } | |
1325 | else if (ABI_64_P (abfd)) | |
52bc799a | 1326 | { |
52bc799a | 1327 | if (offset < 4 |
fa289a5f | 1328 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1329 | return FALSE; |
1330 | } | |
1331 | else | |
1332 | { | |
52bc799a | 1333 | if (offset < 3 |
fa289a5f | 1334 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1335 | return FALSE; |
1336 | } | |
142411ca L |
1337 | } |
1338 | else | |
1339 | { | |
1340 | /* Check transition from LD access model. Only | |
1341 | leaq foo@tlsld(%rip), %rdi; | |
1342 | call __tls_get_addr | |
5c98a14e JJ |
1343 | can transit to different access model. For largepic |
1344 | we also support: | |
1345 | leaq foo@tlsld(%rip), %rdi | |
1346 | movabsq $__tls_get_addr@pltoff, %rax | |
1347 | addq $rbx, %rax | |
1348 | call *%rax. */ | |
142411ca | 1349 | |
fa289a5f | 1350 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1351 | |
1352 | if (offset < 3 || (offset + 9) > sec->size) | |
1353 | return FALSE; | |
1354 | ||
5c98a14e | 1355 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
142411ca | 1356 | return FALSE; |
5c98a14e JJ |
1357 | |
1358 | if (0xe8 != *(contents + offset + 4)) | |
1359 | { | |
1360 | if (!ABI_64_P (abfd) | |
1361 | || (offset + 19) > sec->size | |
1362 | || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0 | |
1363 | || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5) | |
1364 | != 0) | |
1365 | return FALSE; | |
1366 | largepic = TRUE; | |
1367 | } | |
142411ca L |
1368 | } |
1369 | ||
351f65ca | 1370 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1371 | if (r_symndx < symtab_hdr->sh_info) |
1372 | return FALSE; | |
1373 | ||
1374 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
c4fb387b | 1375 | /* Use strncmp to check __tls_get_addr since __tls_get_addr |
eed180f8 | 1376 | may be versioned. */ |
142411ca L |
1377 | return (h != NULL |
1378 | && h->root.root.string != NULL | |
5c98a14e JJ |
1379 | && (largepic |
1380 | ? ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64 | |
1381 | : (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32 | |
1382 | || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32)) | |
c4fb387b L |
1383 | && (strncmp (h->root.root.string, |
1384 | "__tls_get_addr", 14) == 0)); | |
142411ca L |
1385 | |
1386 | case R_X86_64_GOTTPOFF: | |
1387 | /* Check transition from IE access model: | |
4a4c5f25 L |
1388 | mov foo@gottpoff(%rip), %reg |
1389 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1390 | */ |
1391 | ||
4a4c5f25 L |
1392 | /* Check REX prefix first. */ |
1393 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1394 | { | |
1395 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1396 | if (val != 0x48 && val != 0x4c) | |
1397 | { | |
1398 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1399 | if (ABI_64_P (abfd)) | |
1400 | return FALSE; | |
1401 | } | |
1402 | } | |
1403 | else | |
1404 | { | |
1405 | /* X32 may not have any REX prefix. */ | |
1406 | if (ABI_64_P (abfd)) | |
1407 | return FALSE; | |
1408 | if (offset < 2 || (offset + 3) > sec->size) | |
1409 | return FALSE; | |
1410 | } | |
142411ca L |
1411 | |
1412 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1413 | if (val != 0x8b && val != 0x03) | |
1414 | return FALSE; | |
1415 | ||
1416 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1417 | return (val & 0xc7) == 5; | |
1418 | ||
1419 | case R_X86_64_GOTPC32_TLSDESC: | |
1420 | /* Check transition from GDesc access model: | |
1421 | leaq x@tlsdesc(%rip), %rax | |
1422 | ||
1423 | Make sure it's a leaq adding rip to a 32-bit offset | |
1424 | into any register, although it's probably almost always | |
1425 | going to be rax. */ | |
1426 | ||
1427 | if (offset < 3 || (offset + 4) > sec->size) | |
1428 | return FALSE; | |
1429 | ||
1430 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1431 | if ((val & 0xfb) != 0x48) | |
1432 | return FALSE; | |
1433 | ||
1434 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1435 | return FALSE; | |
1436 | ||
1437 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1438 | return (val & 0xc7) == 0x05; | |
1439 | ||
1440 | case R_X86_64_TLSDESC_CALL: | |
1441 | /* Check transition from GDesc access model: | |
1442 | call *x@tlsdesc(%rax) | |
1443 | */ | |
1444 | if (offset + 2 <= sec->size) | |
1445 | { | |
1446 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
fa289a5f AM |
1447 | static const unsigned char call[] = { 0xff, 0x10 }; |
1448 | return memcmp (contents + offset, call, 2) == 0; | |
142411ca L |
1449 | } |
1450 | ||
1451 | return FALSE; | |
1452 | ||
1453 | default: | |
1454 | abort (); | |
1455 | } | |
1456 | } | |
1457 | ||
1458 | /* Return TRUE if the TLS access transition is OK or no transition | |
1459 | will be performed. Update R_TYPE if there is a transition. */ | |
1460 | ||
1461 | static bfd_boolean | |
351f65ca L |
1462 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1463 | asection *sec, bfd_byte *contents, | |
1464 | Elf_Internal_Shdr *symtab_hdr, | |
1465 | struct elf_link_hash_entry **sym_hashes, | |
1466 | unsigned int *r_type, int tls_type, | |
1467 | const Elf_Internal_Rela *rel, | |
1468 | const Elf_Internal_Rela *relend, | |
1469 | struct elf_link_hash_entry *h, | |
bedfd056 L |
1470 | unsigned long r_symndx, |
1471 | bfd_boolean from_relocate_section) | |
142411ca L |
1472 | { |
1473 | unsigned int from_type = *r_type; | |
1474 | unsigned int to_type = from_type; | |
1475 | bfd_boolean check = TRUE; | |
1476 | ||
bb1cb422 L |
1477 | /* Skip TLS transition for functions. */ |
1478 | if (h != NULL | |
1479 | && (h->type == STT_FUNC | |
1480 | || h->type == STT_GNU_IFUNC)) | |
1481 | return TRUE; | |
1482 | ||
142411ca | 1483 | switch (from_type) |
bffbf940 JJ |
1484 | { |
1485 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1486 | case R_X86_64_GOTPC32_TLSDESC: |
1487 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1488 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1489 | if (bfd_link_executable (info)) |
142411ca L |
1490 | { |
1491 | if (h == NULL) | |
1492 | to_type = R_X86_64_TPOFF32; | |
1493 | else | |
1494 | to_type = R_X86_64_GOTTPOFF; | |
1495 | } | |
1496 | ||
bedfd056 L |
1497 | /* When we are called from elf_x86_64_relocate_section, there may |
1498 | be additional transitions based on TLS_TYPE. */ | |
1499 | if (from_relocate_section) | |
142411ca L |
1500 | { |
1501 | unsigned int new_to_type = to_type; | |
1502 | ||
0e1862bb | 1503 | if (bfd_link_executable (info) |
142411ca L |
1504 | && h != NULL |
1505 | && h->dynindx == -1 | |
1506 | && tls_type == GOT_TLS_IE) | |
1507 | new_to_type = R_X86_64_TPOFF32; | |
1508 | ||
1509 | if (to_type == R_X86_64_TLSGD | |
1510 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1511 | || to_type == R_X86_64_TLSDESC_CALL) | |
1512 | { | |
1513 | if (tls_type == GOT_TLS_IE) | |
1514 | new_to_type = R_X86_64_GOTTPOFF; | |
1515 | } | |
1516 | ||
1517 | /* We checked the transition before when we were called from | |
351f65ca | 1518 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1519 | transition which hasn't been checked before. */ |
1520 | check = new_to_type != to_type && from_type == to_type; | |
1521 | to_type = new_to_type; | |
1522 | } | |
1523 | ||
1524 | break; | |
1525 | ||
bffbf940 | 1526 | case R_X86_64_TLSLD: |
0e1862bb | 1527 | if (bfd_link_executable (info)) |
142411ca L |
1528 | to_type = R_X86_64_TPOFF32; |
1529 | break; | |
1530 | ||
1531 | default: | |
1532 | return TRUE; | |
bffbf940 JJ |
1533 | } |
1534 | ||
142411ca L |
1535 | /* Return TRUE if there is no transition. */ |
1536 | if (from_type == to_type) | |
1537 | return TRUE; | |
1538 | ||
1539 | /* Check if the transition can be performed. */ | |
1540 | if (check | |
351f65ca L |
1541 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1542 | symtab_hdr, sym_hashes, | |
1543 | from_type, rel, relend)) | |
142411ca | 1544 | { |
2f629d23 | 1545 | reloc_howto_type *from, *to; |
4c544807 | 1546 | const char *name; |
142411ca | 1547 | |
351f65ca L |
1548 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1549 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1550 | |
4c544807 L |
1551 | if (h) |
1552 | name = h->root.root.string; | |
1553 | else | |
1554 | { | |
351f65ca | 1555 | struct elf_x86_64_link_hash_table *htab; |
4dfe6ac6 | 1556 | |
351f65ca | 1557 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1558 | if (htab == NULL) |
1559 | name = "*unknown*"; | |
1560 | else | |
1561 | { | |
1562 | Elf_Internal_Sym *isym; | |
1563 | ||
1564 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1565 | abfd, r_symndx); | |
1566 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1567 | } | |
4c544807 L |
1568 | } |
1569 | ||
142411ca L |
1570 | (*_bfd_error_handler) |
1571 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1572 | "in section `%A' failed"), | |
4c544807 | 1573 | abfd, sec, from->name, to->name, name, |
142411ca L |
1574 | (unsigned long) rel->r_offset); |
1575 | bfd_set_error (bfd_error_bad_value); | |
1576 | return FALSE; | |
1577 | } | |
1578 | ||
1579 | *r_type = to_type; | |
1580 | return TRUE; | |
bffbf940 JJ |
1581 | } |
1582 | ||
c1d11331 L |
1583 | /* Rename some of the generic section flags to better document how they |
1584 | are used here. */ | |
338c190a L |
1585 | #define need_convert_load sec_flg0 |
1586 | #define check_relocs_failed sec_flg1 | |
1587 | ||
1588 | static bfd_boolean | |
1589 | elf_x86_64_need_pic (bfd *input_bfd, asection *sec, | |
1590 | struct elf_link_hash_entry *h, | |
1591 | Elf_Internal_Shdr *symtab_hdr, | |
1592 | Elf_Internal_Sym *isym, | |
1593 | reloc_howto_type *howto) | |
1594 | { | |
1595 | const char *v = ""; | |
1596 | const char *und = ""; | |
1597 | const char *pic = ""; | |
1598 | ||
1599 | const char *name; | |
1600 | if (h) | |
1601 | { | |
1602 | name = h->root.root.string; | |
1603 | switch (ELF_ST_VISIBILITY (h->other)) | |
1604 | { | |
1605 | case STV_HIDDEN: | |
1606 | v = _("hidden symbol "); | |
1607 | break; | |
1608 | case STV_INTERNAL: | |
1609 | v = _("internal symbol "); | |
1610 | break; | |
1611 | case STV_PROTECTED: | |
1612 | v = _("protected symbol "); | |
1613 | break; | |
1614 | default: | |
1615 | v = _("symbol "); | |
1616 | pic = _("; recompile with -fPIC"); | |
1617 | break; | |
1618 | } | |
1619 | ||
1620 | if (!h->def_regular && !h->def_dynamic) | |
1621 | und = _("undefined "); | |
1622 | } | |
1623 | else | |
1624 | { | |
1625 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL); | |
1626 | pic = _("; recompile with -fPIC"); | |
1627 | } | |
1628 | ||
1629 | (*_bfd_error_handler) (_("%B: relocation %s against %s%s`%s' can " | |
1630 | "not be used when making a shared object%s"), | |
1631 | input_bfd, howto->name, und, v, name, pic); | |
1632 | bfd_set_error (bfd_error_bad_value); | |
1633 | sec->check_relocs_failed = 1; | |
1634 | return FALSE; | |
1635 | } | |
c1d11331 | 1636 | |
c175a657 L |
1637 | /* With the local symbol, foo, we convert |
1638 | mov foo@GOTPCREL(%rip), %reg | |
1639 | to | |
1640 | lea foo(%rip), %reg | |
1641 | and convert | |
1642 | call/jmp *foo@GOTPCREL(%rip) | |
1643 | to | |
1644 | nop call foo/jmp foo nop | |
1645 | When PIC is false, convert | |
1646 | test %reg, foo@GOTPCREL(%rip) | |
1647 | to | |
1648 | test $foo, %reg | |
1649 | and convert | |
1650 | binop foo@GOTPCREL(%rip), %reg | |
1651 | to | |
1652 | binop $foo, %reg | |
1653 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1654 | instructions. */ | |
1655 | ||
1656 | static bfd_boolean | |
1657 | elf_x86_64_convert_load_reloc (bfd *abfd, asection *sec, | |
1658 | bfd_byte *contents, | |
1659 | Elf_Internal_Rela *irel, | |
1660 | struct elf_link_hash_entry *h, | |
1661 | bfd_boolean *converted, | |
1662 | struct bfd_link_info *link_info) | |
1663 | { | |
1664 | struct elf_x86_64_link_hash_table *htab; | |
1665 | bfd_boolean is_pic; | |
1666 | bfd_boolean require_reloc_pc32; | |
1667 | bfd_boolean relocx; | |
1668 | bfd_boolean to_reloc_pc32; | |
1669 | asection *tsec; | |
1670 | char symtype; | |
1671 | bfd_signed_vma raddend; | |
1672 | unsigned int opcode; | |
1673 | unsigned int modrm; | |
1674 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
1675 | unsigned int r_symndx; | |
1676 | bfd_vma toff; | |
1677 | bfd_vma roff = irel->r_offset; | |
1678 | ||
1679 | if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2)) | |
1680 | return TRUE; | |
1681 | ||
1682 | raddend = irel->r_addend; | |
1683 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
1684 | if (raddend != -4) | |
1685 | return TRUE; | |
1686 | ||
1687 | htab = elf_x86_64_hash_table (link_info); | |
1688 | is_pic = bfd_link_pic (link_info); | |
1689 | ||
1690 | relocx = (r_type == R_X86_64_GOTPCRELX | |
1691 | || r_type == R_X86_64_REX_GOTPCRELX); | |
1692 | ||
1693 | /* TRUE if we can convert only to R_X86_64_PC32. Enable it for | |
1694 | --no-relax. */ | |
1695 | require_reloc_pc32 | |
1696 | = link_info->disable_target_specific_optimizations > 1; | |
1697 | ||
1698 | r_symndx = htab->r_sym (irel->r_info); | |
1699 | ||
1700 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1701 | ||
1702 | /* Convert mov to lea since it has been done for a while. */ | |
1703 | if (opcode != 0x8b) | |
1704 | { | |
1705 | /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX | |
1706 | for call, jmp or one of adc, add, and, cmp, or, sbb, sub, | |
1707 | test, xor instructions. */ | |
1708 | if (!relocx) | |
1709 | return TRUE; | |
1710 | } | |
1711 | ||
1712 | /* We convert only to R_X86_64_PC32: | |
1713 | 1. Branch. | |
1714 | 2. R_X86_64_GOTPCREL since we can't modify REX byte. | |
1715 | 3. require_reloc_pc32 is true. | |
1716 | 4. PIC. | |
1717 | */ | |
1718 | to_reloc_pc32 = (opcode == 0xff | |
1719 | || !relocx | |
1720 | || require_reloc_pc32 | |
1721 | || is_pic); | |
1722 | ||
1723 | /* Get the symbol referred to by the reloc. */ | |
1724 | if (h == NULL) | |
1725 | { | |
1726 | Elf_Internal_Sym *isym | |
1727 | = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx); | |
1728 | ||
1729 | /* Skip relocation against undefined symbols. */ | |
1730 | if (isym->st_shndx == SHN_UNDEF) | |
1731 | return TRUE; | |
1732 | ||
1733 | symtype = ELF_ST_TYPE (isym->st_info); | |
1734 | ||
1735 | if (isym->st_shndx == SHN_ABS) | |
1736 | tsec = bfd_abs_section_ptr; | |
1737 | else if (isym->st_shndx == SHN_COMMON) | |
1738 | tsec = bfd_com_section_ptr; | |
1739 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
1740 | tsec = &_bfd_elf_large_com_section; | |
1741 | else | |
1742 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1743 | ||
1744 | toff = isym->st_value; | |
1745 | } | |
1746 | else | |
1747 | { | |
1748 | /* Undefined weak symbol is only bound locally in executable | |
1749 | and its reference is resolved as 0 without relocation | |
1750 | overflow. We can only perform this optimization for | |
1751 | GOTPCRELX relocations since we need to modify REX byte. | |
1752 | It is OK convert mov with R_X86_64_GOTPCREL to | |
1753 | R_X86_64_PC32. */ | |
1754 | if ((relocx || opcode == 0x8b) | |
1755 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, | |
1756 | TRUE, | |
1757 | elf_x86_64_hash_entry (h))) | |
1758 | { | |
1759 | if (opcode == 0xff) | |
1760 | { | |
1761 | /* Skip for branch instructions since R_X86_64_PC32 | |
1762 | may overflow. */ | |
1763 | if (require_reloc_pc32) | |
1764 | return TRUE; | |
1765 | } | |
1766 | else if (relocx) | |
1767 | { | |
1768 | /* For non-branch instructions, we can convert to | |
1769 | R_X86_64_32/R_X86_64_32S since we know if there | |
1770 | is a REX byte. */ | |
1771 | to_reloc_pc32 = FALSE; | |
1772 | } | |
1773 | ||
1774 | /* Since we don't know the current PC when PIC is true, | |
1775 | we can't convert to R_X86_64_PC32. */ | |
1776 | if (to_reloc_pc32 && is_pic) | |
1777 | return TRUE; | |
1778 | ||
1779 | goto convert; | |
1780 | } | |
1781 | /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since | |
1782 | ld.so may use its link-time address. */ | |
1783 | else if ((h->def_regular | |
1784 | || h->root.type == bfd_link_hash_defined | |
1785 | || h->root.type == bfd_link_hash_defweak) | |
1786 | && h != htab->elf.hdynamic | |
1787 | && SYMBOL_REFERENCES_LOCAL (link_info, h)) | |
1788 | { | |
1789 | /* bfd_link_hash_new or bfd_link_hash_undefined is | |
1790 | set by an assignment in a linker script in | |
1791 | bfd_elf_record_link_assignment. */ | |
1792 | if (h->def_regular | |
1793 | && (h->root.type == bfd_link_hash_new | |
1794 | || h->root.type == bfd_link_hash_undefined)) | |
1795 | { | |
1796 | /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */ | |
1797 | if (require_reloc_pc32) | |
1798 | return TRUE; | |
1799 | goto convert; | |
1800 | } | |
1801 | tsec = h->root.u.def.section; | |
1802 | toff = h->root.u.def.value; | |
1803 | symtype = h->type; | |
1804 | } | |
1805 | else | |
1806 | return TRUE; | |
1807 | } | |
1808 | ||
2168b268 L |
1809 | /* Don't convert GOTPCREL relocation against large section. */ |
1810 | if (elf_section_data (tsec) != NULL | |
1811 | && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0) | |
1812 | return TRUE; | |
1813 | ||
c175a657 L |
1814 | /* We can only estimate relocation overflow for R_X86_64_PC32. */ |
1815 | if (!to_reloc_pc32) | |
1816 | goto convert; | |
1817 | ||
1818 | if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE) | |
1819 | { | |
1820 | /* At this stage in linking, no SEC_MERGE symbol has been | |
1821 | adjusted, so all references to such symbols need to be | |
1822 | passed through _bfd_merged_section_offset. (Later, in | |
1823 | relocate_section, all SEC_MERGE symbols *except* for | |
1824 | section symbols have been adjusted.) | |
1825 | ||
1826 | gas may reduce relocations against symbols in SEC_MERGE | |
1827 | sections to a relocation against the section symbol when | |
1828 | the original addend was zero. When the reloc is against | |
1829 | a section symbol we should include the addend in the | |
1830 | offset passed to _bfd_merged_section_offset, since the | |
1831 | location of interest is the original symbol. On the | |
1832 | other hand, an access to "sym+addend" where "sym" is not | |
1833 | a section symbol should not include the addend; Such an | |
1834 | access is presumed to be an offset from "sym"; The | |
1835 | location of interest is just "sym". */ | |
1836 | if (symtype == STT_SECTION) | |
1837 | toff += raddend; | |
1838 | ||
1839 | toff = _bfd_merged_section_offset (abfd, &tsec, | |
1840 | elf_section_data (tsec)->sec_info, | |
1841 | toff); | |
1842 | ||
1843 | if (symtype != STT_SECTION) | |
1844 | toff += raddend; | |
1845 | } | |
1846 | else | |
1847 | toff += raddend; | |
1848 | ||
1849 | /* Don't convert if R_X86_64_PC32 relocation overflows. */ | |
1850 | if (tsec->output_section == sec->output_section) | |
1851 | { | |
1852 | if ((toff - roff + 0x80000000) > 0xffffffff) | |
1853 | return TRUE; | |
1854 | } | |
1855 | else | |
1856 | { | |
1857 | bfd_signed_vma distance; | |
1858 | ||
1859 | /* At this point, we don't know the load addresses of TSEC | |
1860 | section nor SEC section. We estimate the distrance between | |
1861 | SEC and TSEC. We store the estimated distances in the | |
1862 | compressed_size field of the output section, which is only | |
1863 | used to decompress the compressed input section. */ | |
1864 | if (sec->output_section->compressed_size == 0) | |
1865 | { | |
1866 | asection *asect; | |
1867 | bfd_size_type size = 0; | |
1868 | for (asect = link_info->output_bfd->sections; | |
1869 | asect != NULL; | |
1870 | asect = asect->next) | |
1871 | /* Skip debug sections since compressed_size is used to | |
1872 | compress debug sections. */ | |
1873 | if ((asect->flags & SEC_DEBUGGING) == 0) | |
1874 | { | |
1875 | asection *i; | |
1876 | for (i = asect->map_head.s; | |
1877 | i != NULL; | |
1878 | i = i->map_head.s) | |
1879 | { | |
1880 | size = align_power (size, i->alignment_power); | |
1881 | size += i->size; | |
1882 | } | |
1883 | asect->compressed_size = size; | |
1884 | } | |
1885 | } | |
1886 | ||
1887 | /* Don't convert GOTPCREL relocations if TSEC isn't placed | |
1888 | after SEC. */ | |
1889 | distance = (tsec->output_section->compressed_size | |
1890 | - sec->output_section->compressed_size); | |
1891 | if (distance < 0) | |
1892 | return TRUE; | |
1893 | ||
1894 | /* Take PT_GNU_RELRO segment into account by adding | |
1895 | maxpagesize. */ | |
1896 | if ((toff + distance + get_elf_backend_data (abfd)->maxpagesize | |
1897 | - roff + 0x80000000) > 0xffffffff) | |
1898 | return TRUE; | |
1899 | } | |
1900 | ||
1901 | convert: | |
1902 | if (opcode == 0xff) | |
1903 | { | |
1904 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
1905 | unsigned int nop; | |
1906 | unsigned int disp; | |
1907 | bfd_vma nop_offset; | |
1908 | ||
1909 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
1910 | R_X86_64_PC32. */ | |
1911 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1912 | if (modrm == 0x25) | |
1913 | { | |
1914 | /* Convert to "jmp foo nop". */ | |
1915 | modrm = 0xe9; | |
1916 | nop = NOP_OPCODE; | |
1917 | nop_offset = irel->r_offset + 3; | |
1918 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1919 | irel->r_offset -= 1; | |
1920 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1921 | } | |
1922 | else | |
1923 | { | |
1924 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE | |
1925 | is a nop prefix. */ | |
1926 | modrm = 0xe8; | |
1927 | nop = link_info->call_nop_byte; | |
1928 | if (link_info->call_nop_as_suffix) | |
1929 | { | |
1930 | nop_offset = irel->r_offset + 3; | |
1931 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
1932 | irel->r_offset -= 1; | |
1933 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
1934 | } | |
1935 | else | |
1936 | nop_offset = irel->r_offset - 2; | |
1937 | } | |
1938 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1939 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1940 | r_type = R_X86_64_PC32; | |
1941 | } | |
1942 | else | |
1943 | { | |
1944 | unsigned int rex; | |
1945 | unsigned int rex_mask = REX_R; | |
1946 | ||
1947 | if (r_type == R_X86_64_REX_GOTPCRELX) | |
1948 | rex = bfd_get_8 (abfd, contents + roff - 3); | |
1949 | else | |
1950 | rex = 0; | |
1951 | ||
1952 | if (opcode == 0x8b) | |
1953 | { | |
1954 | if (to_reloc_pc32) | |
1955 | { | |
1956 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1957 | "lea foo(%rip), %reg". */ | |
1958 | opcode = 0x8d; | |
1959 | r_type = R_X86_64_PC32; | |
1960 | } | |
1961 | else | |
1962 | { | |
1963 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
1964 | "mov $foo, %reg". */ | |
1965 | opcode = 0xc7; | |
1966 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1967 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1968 | if ((rex & REX_W) != 0 | |
1969 | && ABI_64_P (link_info->output_bfd)) | |
1970 | { | |
1971 | /* Keep the REX_W bit in REX byte for LP64. */ | |
1972 | r_type = R_X86_64_32S; | |
1973 | goto rewrite_modrm_rex; | |
1974 | } | |
1975 | else | |
1976 | { | |
1977 | /* If the REX_W bit in REX byte isn't needed, | |
1978 | use R_X86_64_32 and clear the W bit to avoid | |
1979 | sign-extend imm32 to imm64. */ | |
1980 | r_type = R_X86_64_32; | |
1981 | /* Clear the W bit in REX byte. */ | |
1982 | rex_mask |= REX_W; | |
1983 | goto rewrite_modrm_rex; | |
1984 | } | |
1985 | } | |
1986 | } | |
1987 | else | |
1988 | { | |
1989 | /* R_X86_64_PC32 isn't supported. */ | |
1990 | if (to_reloc_pc32) | |
1991 | return TRUE; | |
1992 | ||
1993 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1994 | if (opcode == 0x85) | |
1995 | { | |
1996 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
1997 | "test $foo, %reg". */ | |
1998 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1999 | opcode = 0xf7; | |
2000 | } | |
2001 | else | |
2002 | { | |
2003 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
2004 | "binop $foo, %reg". */ | |
2005 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
2006 | opcode = 0x81; | |
2007 | } | |
2008 | ||
2009 | /* Use R_X86_64_32 with 32-bit operand to avoid relocation | |
2010 | overflow when sign-extending imm32 to imm64. */ | |
2011 | r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32; | |
2012 | ||
2013 | rewrite_modrm_rex: | |
2014 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
2015 | ||
2016 | if (rex) | |
2017 | { | |
2018 | /* Move the R bit to the B bit in REX byte. */ | |
2019 | rex = (rex & ~rex_mask) | (rex & REX_R) >> 2; | |
2020 | bfd_put_8 (abfd, rex, contents + roff - 3); | |
2021 | } | |
2022 | ||
2023 | /* No addend for R_X86_64_32/R_X86_64_32S relocations. */ | |
2024 | irel->r_addend = 0; | |
2025 | } | |
2026 | ||
2027 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
2028 | } | |
2029 | ||
2030 | irel->r_info = htab->r_info (r_symndx, r_type); | |
2031 | ||
2032 | *converted = TRUE; | |
2033 | ||
2034 | return TRUE; | |
2035 | } | |
2036 | ||
70256ad8 | 2037 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
2038 | calculate needed space in the global offset table, procedure |
2039 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 2040 | |
b34976b6 | 2041 | static bfd_boolean |
351f65ca L |
2042 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
2043 | asection *sec, | |
2044 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 2045 | { |
351f65ca | 2046 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2047 | Elf_Internal_Shdr *symtab_hdr; |
2048 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
2049 | const Elf_Internal_Rela *rel; |
2050 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 2051 | asection *sreloc; |
bedfd056 | 2052 | bfd_byte *contents; |
dd7e64d4 | 2053 | bfd_boolean use_plt_got; |
70256ad8 | 2054 | |
0e1862bb | 2055 | if (bfd_link_relocatable (info)) |
b34976b6 | 2056 | return TRUE; |
70256ad8 | 2057 | |
0ffa91dd NC |
2058 | BFD_ASSERT (is_x86_64_elf (abfd)); |
2059 | ||
351f65ca | 2060 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 | 2061 | if (htab == NULL) |
afd9acee L |
2062 | { |
2063 | sec->check_relocs_failed = 1; | |
2064 | return FALSE; | |
2065 | } | |
4dfe6ac6 | 2066 | |
bedfd056 L |
2067 | /* Get the section contents. */ |
2068 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2069 | contents = elf_section_data (sec)->this_hdr.contents; | |
2070 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2071 | { | |
2072 | sec->check_relocs_failed = 1; | |
2073 | return FALSE; | |
2074 | } | |
2075 | ||
dd7e64d4 L |
2076 | use_plt_got = get_elf_x86_64_backend_data (abfd) == &elf_x86_64_arch_bed; |
2077 | ||
0ffa91dd | 2078 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 2079 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 2080 | |
c434dee6 | 2081 | sreloc = NULL; |
cbe950e9 | 2082 | |
70256ad8 AJ |
2083 | rel_end = relocs + sec->reloc_count; |
2084 | for (rel = relocs; rel < rel_end; rel++) | |
2085 | { | |
bffbf940 | 2086 | unsigned int r_type; |
70256ad8 AJ |
2087 | unsigned long r_symndx; |
2088 | struct elf_link_hash_entry *h; | |
aec6b87e | 2089 | struct elf_x86_64_link_hash_entry *eh; |
4c544807 L |
2090 | Elf_Internal_Sym *isym; |
2091 | const char *name; | |
06a6a421 | 2092 | bfd_boolean size_reloc; |
70256ad8 | 2093 | |
351f65ca L |
2094 | r_symndx = htab->r_sym (rel->r_info); |
2095 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
2096 | |
2097 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
2098 | { | |
d003868e AM |
2099 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
2100 | abfd, r_symndx); | |
afd9acee | 2101 | goto error_return; |
c434dee6 AJ |
2102 | } |
2103 | ||
70256ad8 | 2104 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
2105 | { |
2106 | /* A local symbol. */ | |
c2e61a4e L |
2107 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
2108 | abfd, r_symndx); | |
2109 | if (isym == NULL) | |
afd9acee | 2110 | goto error_return; |
c25bc9fc L |
2111 | |
2112 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 2113 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 2114 | { |
351f65ca L |
2115 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, |
2116 | TRUE); | |
c25bc9fc | 2117 | if (h == NULL) |
afd9acee | 2118 | goto error_return; |
6bbec505 | 2119 | |
c25bc9fc L |
2120 | /* Fake a STT_GNU_IFUNC symbol. */ |
2121 | h->type = STT_GNU_IFUNC; | |
2122 | h->def_regular = 1; | |
2123 | h->ref_regular = 1; | |
2124 | h->forced_local = 1; | |
2125 | h->root.type = bfd_link_hash_defined; | |
2126 | } | |
2127 | else | |
2128 | h = NULL; | |
2129 | } | |
70256ad8 | 2130 | else |
71cb9464 | 2131 | { |
4c544807 | 2132 | isym = NULL; |
71cb9464 L |
2133 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
2134 | while (h->root.type == bfd_link_hash_indirect | |
2135 | || h->root.type == bfd_link_hash_warning) | |
2136 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 2137 | } |
cbe950e9 | 2138 | |
d1534d16 L |
2139 | /* Check invalid x32 relocations. */ |
2140 | if (!ABI_64_P (abfd)) | |
2141 | switch (r_type) | |
2142 | { | |
2143 | default: | |
2144 | break; | |
2145 | ||
d1534d16 L |
2146 | case R_X86_64_DTPOFF64: |
2147 | case R_X86_64_TPOFF64: | |
2148 | case R_X86_64_PC64: | |
2149 | case R_X86_64_GOTOFF64: | |
2150 | case R_X86_64_GOT64: | |
2151 | case R_X86_64_GOTPCREL64: | |
2152 | case R_X86_64_GOTPC64: | |
2153 | case R_X86_64_GOTPLT64: | |
2154 | case R_X86_64_PLTOFF64: | |
2155 | { | |
2156 | if (h) | |
2157 | name = h->root.root.string; | |
2158 | else | |
2159 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
2160 | NULL); | |
2161 | (*_bfd_error_handler) | |
2162 | (_("%B: relocation %s against symbol `%s' isn't " | |
2163 | "supported in x32 mode"), abfd, | |
2164 | x86_64_elf_howto_table[r_type].name, name); | |
2165 | bfd_set_error (bfd_error_bad_value); | |
afd9acee | 2166 | goto error_return; |
d1534d16 L |
2167 | } |
2168 | break; | |
2169 | } | |
2170 | ||
c25bc9fc L |
2171 | if (h != NULL) |
2172 | { | |
cbe950e9 L |
2173 | switch (r_type) |
2174 | { | |
2175 | default: | |
2176 | break; | |
2177 | ||
0ff2b86e L |
2178 | case R_X86_64_PC32_BND: |
2179 | case R_X86_64_PLT32_BND: | |
d258b828 IZ |
2180 | case R_X86_64_PC32: |
2181 | case R_X86_64_PLT32: | |
2182 | case R_X86_64_32: | |
2183 | case R_X86_64_64: | |
0ff2b86e L |
2184 | /* MPX PLT is supported only if elf_x86_64_arch_bed |
2185 | is used in 64-bit mode. */ | |
2186 | if (ABI_64_P (abfd) | |
d258b828 IZ |
2187 | && info->bndplt |
2188 | && (get_elf_x86_64_backend_data (abfd) | |
2189 | == &elf_x86_64_arch_bed)) | |
0ff2b86e | 2190 | { |
bc696fd5 | 2191 | elf_x86_64_hash_entry (h)->has_bnd_reloc = 1; |
0ff2b86e L |
2192 | |
2193 | /* Create the second PLT for Intel MPX support. */ | |
2194 | if (htab->plt_bnd == NULL) | |
2195 | { | |
2196 | unsigned int plt_bnd_align; | |
2197 | const struct elf_backend_data *bed; | |
2198 | ||
2199 | bed = get_elf_backend_data (info->output_bfd); | |
6db50b4c L |
2200 | BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry) == 8 |
2201 | && (sizeof (elf_x86_64_bnd_plt2_entry) | |
2202 | == sizeof (elf_x86_64_legacy_plt2_entry))); | |
2203 | plt_bnd_align = 3; | |
0ff2b86e L |
2204 | |
2205 | if (htab->elf.dynobj == NULL) | |
2206 | htab->elf.dynobj = abfd; | |
2207 | htab->plt_bnd | |
2208 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
2209 | ".plt.bnd", | |
2210 | (bed->dynamic_sec_flags | |
2211 | | SEC_ALLOC | |
2212 | | SEC_CODE | |
2213 | | SEC_LOAD | |
2214 | | SEC_READONLY)); | |
2215 | if (htab->plt_bnd == NULL | |
2216 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
2217 | htab->plt_bnd, | |
2218 | plt_bnd_align)) | |
afd9acee | 2219 | goto error_return; |
0ff2b86e L |
2220 | } |
2221 | } | |
2222 | ||
cbe950e9 | 2223 | case R_X86_64_32S: |
cbe950e9 | 2224 | case R_X86_64_PC64: |
cbe950e9 | 2225 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
2226 | case R_X86_64_GOTPCRELX: |
2227 | case R_X86_64_REX_GOTPCRELX: | |
cbe950e9 | 2228 | case R_X86_64_GOTPCREL64: |
9d4057ee AM |
2229 | if (htab->elf.dynobj == NULL) |
2230 | htab->elf.dynobj = abfd; | |
466ee2af L |
2231 | /* Create the ifunc sections for static executables. */ |
2232 | if (h->type == STT_GNU_IFUNC | |
2233 | && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj, | |
2234 | info)) | |
afd9acee | 2235 | goto error_return; |
cbe950e9 L |
2236 | break; |
2237 | } | |
2238 | ||
ad1e85de L |
2239 | /* It is referenced by a non-shared object. */ |
2240 | h->ref_regular = 1; | |
61315175 | 2241 | h->root.non_ir_ref = 1; |
13a2df29 L |
2242 | |
2243 | if (h->type == STT_GNU_IFUNC) | |
2244 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
2245 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 2246 | } |
70256ad8 | 2247 | |
bedfd056 | 2248 | if (! elf_x86_64_tls_transition (info, abfd, sec, contents, |
351f65ca L |
2249 | symtab_hdr, sym_hashes, |
2250 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 2251 | rel, rel_end, h, r_symndx, FALSE)) |
afd9acee | 2252 | goto error_return; |
142411ca | 2253 | |
aec6b87e | 2254 | eh = (struct elf_x86_64_link_hash_entry *) h; |
bffbf940 | 2255 | switch (r_type) |
70256ad8 | 2256 | { |
bffbf940 JJ |
2257 | case R_X86_64_TLSLD: |
2258 | htab->tls_ld_got.refcount += 1; | |
2259 | goto create_got; | |
2260 | ||
2261 | case R_X86_64_TPOFF32: | |
0e1862bb | 2262 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
338c190a L |
2263 | return elf_x86_64_need_pic (abfd, sec, h, symtab_hdr, isym, |
2264 | &x86_64_elf_howto_table[r_type]); | |
aec6b87e L |
2265 | if (eh != NULL) |
2266 | eh->has_got_reloc = 1; | |
bffbf940 | 2267 | break; |
c434dee6 | 2268 | |
bffbf940 | 2269 | case R_X86_64_GOTTPOFF: |
0e1862bb | 2270 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
2271 | info->flags |= DF_STATIC_TLS; |
2272 | /* Fall through */ | |
70256ad8 | 2273 | |
bffbf940 JJ |
2274 | case R_X86_64_GOT32: |
2275 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
2276 | case R_X86_64_GOTPCRELX: |
2277 | case R_X86_64_REX_GOTPCRELX: | |
bffbf940 | 2278 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
2279 | case R_X86_64_GOT64: |
2280 | case R_X86_64_GOTPCREL64: | |
2281 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
2282 | case R_X86_64_GOTPC32_TLSDESC: |
2283 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
2284 | /* This symbol requires a global offset table entry. */ |
2285 | { | |
2286 | int tls_type, old_tls_type; | |
2287 | ||
2288 | switch (r_type) | |
2289 | { | |
2290 | default: tls_type = GOT_NORMAL; break; | |
2291 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
2292 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
2293 | case R_X86_64_GOTPC32_TLSDESC: |
2294 | case R_X86_64_TLSDESC_CALL: | |
2295 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
2296 | } |
2297 | ||
2298 | if (h != NULL) | |
2299 | { | |
2300 | h->got.refcount += 1; | |
aec6b87e | 2301 | old_tls_type = eh->tls_type; |
bffbf940 JJ |
2302 | } |
2303 | else | |
2304 | { | |
2305 | bfd_signed_vma *local_got_refcounts; | |
2306 | ||
2307 | /* This is a global offset table entry for a local symbol. */ | |
2308 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2309 | if (local_got_refcounts == NULL) | |
2310 | { | |
2311 | bfd_size_type size; | |
2312 | ||
2313 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
2314 | size *= sizeof (bfd_signed_vma) |
2315 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
2316 | local_got_refcounts = ((bfd_signed_vma *) |
2317 | bfd_zalloc (abfd, size)); | |
2318 | if (local_got_refcounts == NULL) | |
afd9acee | 2319 | goto error_return; |
bffbf940 | 2320 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
351f65ca | 2321 | elf_x86_64_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 2322 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
351f65ca | 2323 | elf_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 2324 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
2325 | } |
2326 | local_got_refcounts[r_symndx] += 1; | |
2327 | old_tls_type | |
351f65ca | 2328 | = elf_x86_64_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
2329 | } |
2330 | ||
2331 | /* If a TLS symbol is accessed using IE at least once, | |
2332 | there is no point to use dynamic model for it. */ | |
2333 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
2334 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
2335 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 2336 | { |
67a4f2b7 | 2337 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 2338 | tls_type = old_tls_type; |
67a4f2b7 AO |
2339 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2340 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2341 | tls_type |= old_tls_type; | |
bffbf940 JJ |
2342 | else |
2343 | { | |
09a24cbf | 2344 | if (h) |
4c544807 L |
2345 | name = h->root.root.string; |
2346 | else | |
2347 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
2348 | isym, NULL); | |
bffbf940 | 2349 | (*_bfd_error_handler) |
1f7a4e42 | 2350 | (_("%B: '%s' accessed both as normal and thread local symbol"), |
4c544807 | 2351 | abfd, name); |
68c4a57e | 2352 | bfd_set_error (bfd_error_bad_value); |
afd9acee | 2353 | goto error_return; |
bffbf940 JJ |
2354 | } |
2355 | } | |
2356 | ||
2357 | if (old_tls_type != tls_type) | |
2358 | { | |
aec6b87e L |
2359 | if (eh != NULL) |
2360 | eh->tls_type = tls_type; | |
bffbf940 | 2361 | else |
351f65ca | 2362 | elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
2363 | } |
2364 | } | |
c434dee6 AJ |
2365 | /* Fall through */ |
2366 | ||
d6ab8113 JB |
2367 | case R_X86_64_GOTOFF64: |
2368 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2369 | case R_X86_64_GOTPC64: |
bffbf940 | 2370 | create_got: |
aec6b87e L |
2371 | if (eh != NULL) |
2372 | eh->has_got_reloc = 1; | |
6de2ae4a | 2373 | if (htab->elf.sgot == NULL) |
c434dee6 AJ |
2374 | { |
2375 | if (htab->elf.dynobj == NULL) | |
2376 | htab->elf.dynobj = abfd; | |
6de2ae4a L |
2377 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, |
2378 | info)) | |
afd9acee | 2379 | goto error_return; |
c434dee6 | 2380 | } |
70256ad8 AJ |
2381 | break; |
2382 | ||
2383 | case R_X86_64_PLT32: | |
c3320543 | 2384 | case R_X86_64_PLT32_BND: |
70256ad8 | 2385 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
2386 | actually build the entry in adjust_dynamic_symbol, |
2387 | because this might be a case of linking PIC code which is | |
2388 | never referenced by a dynamic object, in which case we | |
2389 | don't need to generate a procedure linkage table entry | |
2390 | after all. */ | |
70256ad8 AJ |
2391 | |
2392 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 2393 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
2394 | if (h == NULL) |
2395 | continue; | |
2396 | ||
aec6b87e | 2397 | eh->has_got_reloc = 1; |
f5385ebf | 2398 | h->needs_plt = 1; |
51b64d56 | 2399 | h->plt.refcount += 1; |
70256ad8 AJ |
2400 | break; |
2401 | ||
7b81dfbb AJ |
2402 | case R_X86_64_PLTOFF64: |
2403 | /* This tries to form the 'address' of a function relative | |
2404 | to GOT. For global symbols we need a PLT entry. */ | |
2405 | if (h != NULL) | |
2406 | { | |
2407 | h->needs_plt = 1; | |
2408 | h->plt.refcount += 1; | |
2409 | } | |
2410 | goto create_got; | |
2411 | ||
6a3e1bae L |
2412 | case R_X86_64_SIZE32: |
2413 | case R_X86_64_SIZE64: | |
06a6a421 | 2414 | size_reloc = TRUE; |
6a3e1bae L |
2415 | goto do_size; |
2416 | ||
248775ba L |
2417 | case R_X86_64_32: |
2418 | if (!ABI_64_P (abfd)) | |
2419 | goto pointer; | |
cc78d0af AJ |
2420 | case R_X86_64_8: |
2421 | case R_X86_64_16: | |
70256ad8 | 2422 | case R_X86_64_32S: |
338c190a L |
2423 | /* Check relocation overflow as these relocs may lead to |
2424 | run-time relocation overflow. Don't error out for | |
1b71fb54 | 2425 | sections we don't care about, such as debug sections or |
338c190a | 2426 | when relocation overflow check is disabled. */ |
4c10bbaa | 2427 | if (!info->no_reloc_overflow_check |
338c190a L |
2428 | && (bfd_link_pic (info) |
2429 | || (bfd_link_executable (info) | |
2430 | && h != NULL | |
2431 | && !h->def_regular | |
2432 | && h->def_dynamic | |
2433 | && (sec->flags & SEC_READONLY) == 0)) | |
2434 | && (sec->flags & SEC_ALLOC) != 0) | |
2435 | return elf_x86_64_need_pic (abfd, sec, h, symtab_hdr, isym, | |
2436 | &x86_64_elf_howto_table[r_type]); | |
1b71fb54 AJ |
2437 | /* Fall through. */ |
2438 | ||
c434dee6 AJ |
2439 | case R_X86_64_PC8: |
2440 | case R_X86_64_PC16: | |
70256ad8 | 2441 | case R_X86_64_PC32: |
c3320543 | 2442 | case R_X86_64_PC32_BND: |
d6ab8113 | 2443 | case R_X86_64_PC64: |
1b71fb54 | 2444 | case R_X86_64_64: |
248775ba | 2445 | pointer: |
aec6b87e L |
2446 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
2447 | eh->has_non_got_reloc = 1; | |
d1ed1c7d L |
2448 | /* STT_GNU_IFUNC symbol must go through PLT even if it is |
2449 | locally defined and undefined symbol may turn out to be | |
2450 | a STT_GNU_IFUNC symbol later. */ | |
2451 | if (h != NULL | |
2452 | && (bfd_link_executable (info) | |
2453 | || ((h->type == STT_GNU_IFUNC | |
2454 | || h->root.type == bfd_link_hash_undefweak | |
2455 | || h->root.type == bfd_link_hash_undefined) | |
2456 | && SYMBOLIC_BIND (info, h)))) | |
c434dee6 AJ |
2457 | { |
2458 | /* If this reloc is in a read-only section, we might | |
2459 | need a copy reloc. We can't check reliably at this | |
2460 | stage whether the section is read-only, as input | |
2461 | sections have not yet been mapped to output sections. | |
2462 | Tentatively set the flag for now, and correct in | |
2463 | adjust_dynamic_symbol. */ | |
f5385ebf | 2464 | h->non_got_ref = 1; |
c434dee6 AJ |
2465 | |
2466 | /* We may need a .plt entry if the function this reloc | |
2467 | refers to is in a shared lib. */ | |
2468 | h->plt.refcount += 1; | |
5db4f0d3 L |
2469 | if (r_type == R_X86_64_PC32) |
2470 | { | |
2471 | /* Since something like ".long foo - ." may be used | |
2472 | as pointer, make sure that PLT is used if foo is | |
2473 | a function defined in a shared library. */ | |
2474 | if ((sec->flags & SEC_CODE) == 0) | |
2475 | h->pointer_equality_needed = 1; | |
2476 | } | |
2477 | else if (r_type != R_X86_64_PC32_BND | |
2478 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
2479 | { |
2480 | h->pointer_equality_needed = 1; | |
2481 | /* At run-time, R_X86_64_64 can be resolved for both | |
2482 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
2483 | can only be resolved for x32. */ | |
2484 | if ((sec->flags & SEC_READONLY) == 0 | |
2485 | && (r_type == R_X86_64_64 | |
2486 | || (!ABI_64_P (abfd) | |
2487 | && (r_type == R_X86_64_32 | |
2488 | || r_type == R_X86_64_32S)))) | |
aec6b87e | 2489 | eh->func_pointer_refcount += 1; |
04ebc307 | 2490 | } |
c434dee6 | 2491 | } |
70256ad8 | 2492 | |
06a6a421 | 2493 | size_reloc = FALSE; |
6a3e1bae | 2494 | do_size: |
70256ad8 AJ |
2495 | /* If we are creating a shared library, and this is a reloc |
2496 | against a global symbol, or a non PC relative reloc | |
2497 | against a local symbol, then we need to copy the reloc | |
2498 | into the shared library. However, if we are linking with | |
2499 | -Bsymbolic, we do not need to copy a reloc against a | |
2500 | global symbol which is defined in an object we are | |
407443a3 | 2501 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
2502 | this point we have not seen all the input files, so it is |
2503 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
2504 | later (it is never cleared). In case of a weak definition, |
2505 | DEF_REGULAR may be cleared later by a strong definition in | |
2506 | a shared library. We account for that possibility below by | |
2507 | storing information in the relocs_copied field of the hash | |
2508 | table entry. A similar situation occurs when creating | |
2509 | shared libraries and symbol visibility changes render the | |
31c0ebfe | 2510 | symbol local. |
c434dee6 AJ |
2511 | |
2512 | If on the other hand, we are creating an executable, we | |
2513 | may need to keep relocations for symbols satisfied by a | |
2514 | dynamic library if we manage to avoid copy relocs for the | |
0f88be7a | 2515 | symbol. */ |
0e1862bb | 2516 | if ((bfd_link_pic (info) |
c434dee6 | 2517 | && (sec->flags & SEC_ALLOC) != 0 |
d8045f23 | 2518 | && (! IS_X86_64_PCREL_TYPE (r_type) |
c434dee6 | 2519 | || (h != NULL |
4e0c91e4 L |
2520 | && (! (bfd_link_pie (info) |
2521 | || SYMBOLIC_BIND (info, h)) | |
c434dee6 | 2522 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 2523 | || !h->def_regular)))) |
d40d037c | 2524 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 2525 | && !bfd_link_pic (info) |
c434dee6 AJ |
2526 | && (sec->flags & SEC_ALLOC) != 0 |
2527 | && h != NULL | |
2528 | && (h->root.type == bfd_link_hash_defweak | |
0f88be7a | 2529 | || !h->def_regular))) |
70256ad8 | 2530 | { |
e03a8ed8 L |
2531 | struct elf_dyn_relocs *p; |
2532 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2533 | |
2534 | /* We must copy these reloc types into the output file. | |
2535 | Create a reloc section in dynobj and make room for | |
2536 | this reloc. */ | |
70256ad8 AJ |
2537 | if (sreloc == NULL) |
2538 | { | |
c434dee6 AJ |
2539 | if (htab->elf.dynobj == NULL) |
2540 | htab->elf.dynobj = abfd; | |
2541 | ||
83bac4b0 | 2542 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
2543 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
2544 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 2545 | |
70256ad8 | 2546 | if (sreloc == NULL) |
afd9acee | 2547 | goto error_return; |
70256ad8 AJ |
2548 | } |
2549 | ||
c434dee6 AJ |
2550 | /* If this is a global symbol, we count the number of |
2551 | relocations we need for this symbol. */ | |
2552 | if (h != NULL) | |
aec6b87e | 2553 | head = &eh->dyn_relocs; |
c434dee6 AJ |
2554 | else |
2555 | { | |
2556 | /* Track dynamic relocs needed for local syms too. | |
2557 | We really need local syms available to do this | |
2558 | easily. Oh well. */ | |
c434dee6 | 2559 | asection *s; |
87d72d41 | 2560 | void **vpp; |
87d72d41 AM |
2561 | |
2562 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2563 | abfd, r_symndx); | |
2564 | if (isym == NULL) | |
afd9acee | 2565 | goto error_return; |
87d72d41 AM |
2566 | |
2567 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2568 | if (s == NULL) |
87d72d41 | 2569 | s = sec; |
70256ad8 | 2570 | |
e81d3500 DD |
2571 | /* Beware of type punned pointers vs strict aliasing |
2572 | rules. */ | |
2573 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2574 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2575 | } |
70256ad8 | 2576 | |
c434dee6 AJ |
2577 | p = *head; |
2578 | if (p == NULL || p->sec != sec) | |
2579 | { | |
2580 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 2581 | |
e03a8ed8 | 2582 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2583 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2584 | if (p == NULL) |
afd9acee | 2585 | goto error_return; |
c434dee6 AJ |
2586 | p->next = *head; |
2587 | *head = p; | |
2588 | p->sec = sec; | |
2589 | p->count = 0; | |
2590 | p->pc_count = 0; | |
70256ad8 | 2591 | } |
c434dee6 AJ |
2592 | |
2593 | p->count += 1; | |
06a6a421 L |
2594 | /* Count size relocation as PC-relative relocation. */ |
2595 | if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc) | |
c434dee6 | 2596 | p->pc_count += 1; |
70256ad8 AJ |
2597 | } |
2598 | break; | |
fe4770f4 AJ |
2599 | |
2600 | /* This relocation describes the C++ object vtable hierarchy. | |
2601 | Reconstruct it for later use during GC. */ | |
2602 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2603 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
afd9acee | 2604 | goto error_return; |
fe4770f4 AJ |
2605 | break; |
2606 | ||
2607 | /* This relocation describes which C++ vtable entries are actually | |
2608 | used. Record for later use during GC. */ | |
2609 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
2610 | BFD_ASSERT (h != NULL); |
2611 | if (h != NULL | |
2612 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
afd9acee | 2613 | goto error_return; |
fe4770f4 | 2614 | break; |
c434dee6 AJ |
2615 | |
2616 | default: | |
2617 | break; | |
70256ad8 | 2618 | } |
dd7e64d4 L |
2619 | |
2620 | if (use_plt_got | |
2621 | && h != NULL | |
2622 | && h->plt.refcount > 0 | |
8ded2ddc L |
2623 | && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
2624 | || h->got.refcount > 0) | |
dd7e64d4 L |
2625 | && htab->plt_got == NULL) |
2626 | { | |
2627 | /* Create the GOT procedure linkage table. */ | |
2628 | unsigned int plt_got_align; | |
2629 | const struct elf_backend_data *bed; | |
2630 | ||
2631 | bed = get_elf_backend_data (info->output_bfd); | |
2632 | BFD_ASSERT (sizeof (elf_x86_64_legacy_plt2_entry) == 8 | |
2633 | && (sizeof (elf_x86_64_bnd_plt2_entry) | |
2634 | == sizeof (elf_x86_64_legacy_plt2_entry))); | |
2635 | plt_got_align = 3; | |
2636 | ||
2637 | if (htab->elf.dynobj == NULL) | |
2638 | htab->elf.dynobj = abfd; | |
2639 | htab->plt_got | |
2640 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
2641 | ".plt.got", | |
2642 | (bed->dynamic_sec_flags | |
2643 | | SEC_ALLOC | |
2644 | | SEC_CODE | |
2645 | | SEC_LOAD | |
2646 | | SEC_READONLY)); | |
2647 | if (htab->plt_got == NULL | |
2648 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
2649 | htab->plt_got, | |
2650 | plt_got_align)) | |
afd9acee | 2651 | goto error_return; |
dd7e64d4 | 2652 | } |
c1d11331 | 2653 | |
56ceb5b5 L |
2654 | if ((r_type == R_X86_64_GOTPCREL |
2655 | || r_type == R_X86_64_GOTPCRELX | |
2656 | || r_type == R_X86_64_REX_GOTPCRELX) | |
c1d11331 | 2657 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
56ceb5b5 | 2658 | sec->need_convert_load = 1; |
70256ad8 AJ |
2659 | } |
2660 | ||
bedfd056 L |
2661 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2662 | { | |
2663 | if (!info->keep_memory) | |
2664 | free (contents); | |
2665 | else | |
2666 | { | |
2667 | /* Cache the section contents for elf_link_input_bfd. */ | |
2668 | elf_section_data (sec)->this_hdr.contents = contents; | |
2669 | } | |
2670 | } | |
2671 | ||
b34976b6 | 2672 | return TRUE; |
afd9acee L |
2673 | |
2674 | error_return: | |
bedfd056 L |
2675 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2676 | free (contents); | |
afd9acee L |
2677 | sec->check_relocs_failed = 1; |
2678 | return FALSE; | |
70256ad8 AJ |
2679 | } |
2680 | ||
2681 | /* Return the section that should be marked against GC for a given | |
407443a3 | 2682 | relocation. */ |
70256ad8 AJ |
2683 | |
2684 | static asection * | |
351f65ca L |
2685 | elf_x86_64_gc_mark_hook (asection *sec, |
2686 | struct bfd_link_info *info, | |
2687 | Elf_Internal_Rela *rel, | |
2688 | struct elf_link_hash_entry *h, | |
2689 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
2690 | { |
2691 | if (h != NULL) | |
351f65ca | 2692 | switch (ELF32_R_TYPE (rel->r_info)) |
07adf181 AM |
2693 | { |
2694 | case R_X86_64_GNU_VTINHERIT: | |
2695 | case R_X86_64_GNU_VTENTRY: | |
2696 | return NULL; | |
2697 | } | |
2698 | ||
2699 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
2700 | } |
2701 | ||
aec6b87e L |
2702 | /* Remove undefined weak symbol from the dynamic symbol table if it |
2703 | is resolved to 0. */ | |
2704 | ||
2705 | static bfd_boolean | |
2706 | elf_x86_64_fixup_symbol (struct bfd_link_info *info, | |
2707 | struct elf_link_hash_entry *h) | |
2708 | { | |
2709 | if (h->dynindx != -1 | |
2710 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, | |
e62b9723 | 2711 | elf_x86_64_hash_entry (h)->has_got_reloc, |
aec6b87e L |
2712 | elf_x86_64_hash_entry (h))) |
2713 | { | |
2714 | h->dynindx = -1; | |
2715 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
2716 | h->dynstr_index); | |
2717 | } | |
2718 | return TRUE; | |
2719 | } | |
2720 | ||
70256ad8 AJ |
2721 | /* Adjust a symbol defined by a dynamic object and referenced by a |
2722 | regular object. The current definition is in some section of the | |
2723 | dynamic object, but we're not including those sections. We have to | |
2724 | change the definition to something the rest of the link can | |
407443a3 | 2725 | understand. */ |
70256ad8 | 2726 | |
b34976b6 | 2727 | static bfd_boolean |
351f65ca L |
2728 | elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
2729 | struct elf_link_hash_entry *h) | |
70256ad8 | 2730 | { |
351f65ca | 2731 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 | 2732 | asection *s; |
5ca5bb35 L |
2733 | struct elf_x86_64_link_hash_entry *eh; |
2734 | struct elf_dyn_relocs *p; | |
70256ad8 | 2735 | |
cbe950e9 L |
2736 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2737 | if (h->type == STT_GNU_IFUNC) | |
2738 | { | |
73bcf233 L |
2739 | /* All local STT_GNU_IFUNC references must be treate as local |
2740 | calls via local PLT. */ | |
5ca5bb35 L |
2741 | if (h->ref_regular |
2742 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2743 | { | |
73bcf233 | 2744 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2745 | struct elf_dyn_relocs **pp; |
2746 | ||
2747 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2748 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2749 | { | |
2750 | pc_count += p->pc_count; | |
2751 | p->count -= p->pc_count; | |
2752 | p->pc_count = 0; | |
73bcf233 | 2753 | count += p->count; |
5ca5bb35 L |
2754 | if (p->count == 0) |
2755 | *pp = p->next; | |
2756 | else | |
2757 | pp = &p->next; | |
2758 | } | |
2759 | ||
73bcf233 | 2760 | if (pc_count || count) |
5ca5bb35 L |
2761 | { |
2762 | h->needs_plt = 1; | |
5ca5bb35 | 2763 | h->non_got_ref = 1; |
a5479e5f L |
2764 | if (h->plt.refcount <= 0) |
2765 | h->plt.refcount = 1; | |
2766 | else | |
2767 | h->plt.refcount += 1; | |
5ca5bb35 L |
2768 | } |
2769 | } | |
2770 | ||
cbe950e9 L |
2771 | if (h->plt.refcount <= 0) |
2772 | { | |
2773 | h->plt.offset = (bfd_vma) -1; | |
2774 | h->needs_plt = 0; | |
2775 | } | |
2776 | return TRUE; | |
2777 | } | |
2778 | ||
70256ad8 AJ |
2779 | /* If this is a function, put it in the procedure linkage table. We |
2780 | will fill in the contents of the procedure linkage table later, | |
2781 | when we know the address of the .got section. */ | |
2782 | if (h->type == STT_FUNC | |
f5385ebf | 2783 | || h->needs_plt) |
70256ad8 | 2784 | { |
c434dee6 | 2785 | if (h->plt.refcount <= 0 |
27482721 AJ |
2786 | || SYMBOL_CALLS_LOCAL (info, h) |
2787 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2788 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 2789 | { |
70256ad8 AJ |
2790 | /* This case can occur if we saw a PLT32 reloc in an input |
2791 | file, but the symbol was never referred to by a dynamic | |
2792 | object, or if all references were garbage collected. In | |
2793 | such a case, we don't actually need to build a procedure | |
2794 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 2795 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2796 | h->needs_plt = 0; |
70256ad8 AJ |
2797 | } |
2798 | ||
b34976b6 | 2799 | return TRUE; |
70256ad8 | 2800 | } |
bbd7ec4a | 2801 | else |
c434dee6 AJ |
2802 | /* It's possible that we incorrectly decided a .plt reloc was |
2803 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
2804 | check_relocs. We can't decide accurately between function and | |
2805 | non-function syms in check-relocs; Objects loaded later in | |
2806 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2807 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
2808 | |
2809 | /* If this is a weak symbol, and there is a real definition, the | |
2810 | processor independent code will have arranged for us to see the | |
407443a3 | 2811 | real definition first, and we can just use the same value. */ |
f6e332e6 | 2812 | if (h->u.weakdef != NULL) |
70256ad8 | 2813 | { |
f6e332e6 AM |
2814 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2815 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2816 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2817 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 2818 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
bc696fd5 L |
2819 | { |
2820 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2821 | h->non_got_ref = h->u.weakdef->non_got_ref; | |
2822 | eh->needs_copy = h->u.weakdef->needs_copy; | |
2823 | } | |
b34976b6 | 2824 | return TRUE; |
70256ad8 AJ |
2825 | } |
2826 | ||
2827 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 2828 | is not a function. */ |
70256ad8 AJ |
2829 | |
2830 | /* If we are creating a shared library, we must presume that the | |
2831 | only references to the symbol are via the global offset table. | |
2832 | For such cases we need not do anything here; the relocations will | |
407443a3 | 2833 | be handled correctly by relocate_section. */ |
0e1862bb | 2834 | if (!bfd_link_executable (info)) |
b34976b6 | 2835 | return TRUE; |
70256ad8 AJ |
2836 | |
2837 | /* If there are no references to this symbol that do not use the | |
2838 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 2839 | if (!h->non_got_ref) |
b34976b6 | 2840 | return TRUE; |
70256ad8 | 2841 | |
c434dee6 AJ |
2842 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2843 | if (info->nocopyreloc) | |
2844 | { | |
f5385ebf | 2845 | h->non_got_ref = 0; |
b34976b6 | 2846 | return TRUE; |
c434dee6 AJ |
2847 | } |
2848 | ||
31c0ebfe | 2849 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 2850 | { |
351f65ca | 2851 | eh = (struct elf_x86_64_link_hash_entry *) h; |
d40d037c AJ |
2852 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2853 | { | |
2854 | s = p->sec->output_section; | |
2855 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2856 | break; | |
2857 | } | |
2858 | ||
2859 | /* If we didn't find any dynamic relocs in read-only sections, then | |
2860 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
2861 | if (p == NULL) | |
2862 | { | |
f5385ebf | 2863 | h->non_got_ref = 0; |
d40d037c AJ |
2864 | return TRUE; |
2865 | } | |
c434dee6 AJ |
2866 | } |
2867 | ||
70256ad8 | 2868 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 2869 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
2870 | an entry for this symbol in the .dynsym section. The dynamic |
2871 | object will contain position independent code, so all references | |
2872 | from the dynamic object to this symbol will go through the global | |
2873 | offset table. The dynamic linker will use the .dynsym entry to | |
2874 | determine the address it must put in the global offset table, so | |
2875 | both the dynamic object and the regular object will refer to the | |
2876 | same memory location for the variable. */ | |
2877 | ||
351f65ca | 2878 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2879 | if (htab == NULL) |
2880 | return FALSE; | |
70256ad8 AJ |
2881 | |
2882 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
2883 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 2884 | runtime process image. */ |
1d7e9d18 | 2885 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
70256ad8 | 2886 | { |
351f65ca L |
2887 | const struct elf_backend_data *bed; |
2888 | bed = get_elf_backend_data (info->output_bfd); | |
2889 | htab->srelbss->size += bed->s->sizeof_rela; | |
f5385ebf | 2890 | h->needs_copy = 1; |
70256ad8 AJ |
2891 | } |
2892 | ||
c434dee6 | 2893 | s = htab->sdynbss; |
70256ad8 | 2894 | |
6cabe1ea | 2895 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
70256ad8 AJ |
2896 | } |
2897 | ||
c434dee6 AJ |
2898 | /* Allocate space in .plt, .got and associated reloc sections for |
2899 | dynamic relocs. */ | |
2900 | ||
b34976b6 | 2901 | static bfd_boolean |
351f65ca | 2902 | elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
2903 | { |
2904 | struct bfd_link_info *info; | |
351f65ca L |
2905 | struct elf_x86_64_link_hash_table *htab; |
2906 | struct elf_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 2907 | struct elf_dyn_relocs *p; |
351f65ca | 2908 | const struct elf_backend_data *bed; |
eed180f8 | 2909 | unsigned int plt_entry_size; |
aec6b87e | 2910 | bfd_boolean resolved_to_zero; |
c434dee6 | 2911 | |
e92d460e | 2912 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2913 | return TRUE; |
c434dee6 | 2914 | |
351f65ca | 2915 | eh = (struct elf_x86_64_link_hash_entry *) h; |
e92d460e | 2916 | |
c434dee6 | 2917 | info = (struct bfd_link_info *) inf; |
351f65ca | 2918 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2919 | if (htab == NULL) |
2920 | return FALSE; | |
351f65ca | 2921 | bed = get_elf_backend_data (info->output_bfd); |
eed180f8 | 2922 | plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
c434dee6 | 2923 | |
e62b9723 L |
2924 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
2925 | eh->has_got_reloc, | |
2926 | eh); | |
aec6b87e | 2927 | |
dd7e64d4 L |
2928 | /* We can't use the GOT PLT if pointer equality is needed since |
2929 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
2930 | linker won't update the GOT slot. We will get into an infinite | |
2931 | loop at run-time. */ | |
2932 | if (htab->plt_got != NULL | |
2933 | && h->type != STT_GNU_IFUNC | |
2934 | && !h->pointer_equality_needed | |
2935 | && h->plt.refcount > 0 | |
2936 | && h->got.refcount > 0) | |
2937 | { | |
2938 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
2939 | reloctions. */ | |
2940 | h->plt.offset = (bfd_vma) -1; | |
2941 | ||
2942 | /* Use the GOT PLT. */ | |
2943 | eh->plt_got.refcount = 1; | |
2944 | } | |
2945 | ||
04ebc307 L |
2946 | /* Clear the reference count of function pointer relocations if |
2947 | symbol isn't a normal function. */ | |
2948 | if (h->type != STT_FUNC) | |
2949 | eh->func_pointer_refcount = 0; | |
2950 | ||
cbe950e9 L |
2951 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2952 | here if it is defined and referenced in a non-shared object. */ | |
2953 | if (h->type == STT_GNU_IFUNC | |
2954 | && h->def_regular) | |
0ff2b86e L |
2955 | { |
2956 | if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, | |
2957 | &eh->dyn_relocs, | |
2df3368d | 2958 | &htab->readonly_dynrelocs_against_ifunc, |
0ff2b86e L |
2959 | plt_entry_size, |
2960 | plt_entry_size, | |
2961 | GOT_ENTRY_SIZE)) | |
2962 | { | |
2963 | asection *s = htab->plt_bnd; | |
2964 | if (h->plt.offset != (bfd_vma) -1 && s != NULL) | |
2965 | { | |
2966 | /* Use the .plt.bnd section if it is created. */ | |
2967 | eh->plt_bnd.offset = s->size; | |
2968 | ||
2969 | /* Make room for this entry in the .plt.bnd section. */ | |
2970 | s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
2971 | } | |
2972 | ||
2973 | return TRUE; | |
2974 | } | |
2975 | else | |
2976 | return FALSE; | |
2977 | } | |
04ebc307 L |
2978 | /* Don't create the PLT entry if there are only function pointer |
2979 | relocations which can be resolved at run-time. */ | |
cbe950e9 | 2980 | else if (htab->elf.dynamic_sections_created |
04ebc307 L |
2981 | && (h->plt.refcount > eh->func_pointer_refcount |
2982 | || eh->plt_got.refcount > 0)) | |
c434dee6 | 2983 | { |
25070364 L |
2984 | bfd_boolean use_plt_got; |
2985 | ||
04ebc307 L |
2986 | /* Clear the reference count of function pointer relocations |
2987 | if PLT is used. */ | |
2988 | eh->func_pointer_refcount = 0; | |
2989 | ||
8ded2ddc | 2990 | if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
25070364 L |
2991 | { |
2992 | /* Don't use the regular PLT for DF_BIND_NOW. */ | |
2993 | h->plt.offset = (bfd_vma) -1; | |
2994 | ||
2995 | /* Use the GOT PLT. */ | |
2996 | h->got.refcount = 1; | |
2997 | eh->plt_got.refcount = 1; | |
2998 | } | |
2999 | ||
3000 | use_plt_got = eh->plt_got.refcount > 0; | |
dd7e64d4 | 3001 | |
c434dee6 AJ |
3002 | /* Make sure this symbol is output as a dynamic symbol. |
3003 | Undefined weak syms won't yet be marked as dynamic. */ | |
3004 | if (h->dynindx == -1 | |
aec6b87e L |
3005 | && !h->forced_local |
3006 | && !resolved_to_zero) | |
c434dee6 | 3007 | { |
c152c796 | 3008 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 3009 | return FALSE; |
c434dee6 AJ |
3010 | } |
3011 | ||
0e1862bb | 3012 | if (bfd_link_pic (info) |
27482721 | 3013 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
c434dee6 | 3014 | { |
6de2ae4a | 3015 | asection *s = htab->elf.splt; |
0ff2b86e | 3016 | asection *bnd_s = htab->plt_bnd; |
dd7e64d4 | 3017 | asection *got_s = htab->plt_got; |
c434dee6 | 3018 | |
7c1e8d3e L |
3019 | /* If this is the first .plt entry, make room for the special |
3020 | first entry. The .plt section is used by prelink to undo | |
3021 | prelinking for dynamic relocations. */ | |
3022 | if (s->size == 0) | |
3023 | s->size = plt_entry_size; | |
3024 | ||
dd7e64d4 L |
3025 | if (use_plt_got) |
3026 | eh->plt_got.offset = got_s->size; | |
3027 | else | |
3028 | { | |
3029 | h->plt.offset = s->size; | |
3030 | if (bnd_s) | |
3031 | eh->plt_bnd.offset = bnd_s->size; | |
3032 | } | |
c434dee6 AJ |
3033 | |
3034 | /* If this symbol is not defined in a regular file, and we are | |
3035 | not generating a shared library, then set the symbol to this | |
3036 | location in the .plt. This is required to make function | |
3037 | pointers compare as equal between the normal executable and | |
3038 | the shared library. */ | |
0e1862bb | 3039 | if (! bfd_link_pic (info) |
f5385ebf | 3040 | && !h->def_regular) |
c434dee6 | 3041 | { |
dd7e64d4 | 3042 | if (use_plt_got) |
0ff2b86e | 3043 | { |
dd7e64d4 L |
3044 | /* We need to make a call to the entry of the GOT PLT |
3045 | instead of regular PLT entry. */ | |
3046 | h->root.u.def.section = got_s; | |
3047 | h->root.u.def.value = eh->plt_got.offset; | |
0ff2b86e L |
3048 | } |
3049 | else | |
3050 | { | |
dd7e64d4 L |
3051 | if (bnd_s) |
3052 | { | |
3053 | /* We need to make a call to the entry of the second | |
3054 | PLT instead of regular PLT entry. */ | |
3055 | h->root.u.def.section = bnd_s; | |
3056 | h->root.u.def.value = eh->plt_bnd.offset; | |
3057 | } | |
3058 | else | |
3059 | { | |
3060 | h->root.u.def.section = s; | |
3061 | h->root.u.def.value = h->plt.offset; | |
3062 | } | |
0ff2b86e | 3063 | } |
c434dee6 AJ |
3064 | } |
3065 | ||
3066 | /* Make room for this entry. */ | |
dd7e64d4 L |
3067 | if (use_plt_got) |
3068 | got_s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
3069 | else | |
3070 | { | |
3071 | s->size += plt_entry_size; | |
3072 | if (bnd_s) | |
3073 | bnd_s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
c434dee6 | 3074 | |
dd7e64d4 L |
3075 | /* We also need to make an entry in the .got.plt section, |
3076 | which will be placed in the .got section by the linker | |
3077 | script. */ | |
3078 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; | |
c434dee6 | 3079 | |
aec6b87e L |
3080 | /* There should be no PLT relocation against resolved |
3081 | undefined weak symbol in executable. */ | |
3082 | if (!resolved_to_zero) | |
3083 | { | |
3084 | /* We also need to make an entry in the .rela.plt | |
3085 | section. */ | |
3086 | htab->elf.srelplt->size += bed->s->sizeof_rela; | |
3087 | htab->elf.srelplt->reloc_count++; | |
3088 | } | |
dd7e64d4 | 3089 | } |
c434dee6 AJ |
3090 | } |
3091 | else | |
3092 | { | |
13f42277 | 3093 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 3094 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 3095 | h->needs_plt = 0; |
c434dee6 AJ |
3096 | } |
3097 | } | |
3098 | else | |
3099 | { | |
13f42277 | 3100 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 3101 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 3102 | h->needs_plt = 0; |
c434dee6 AJ |
3103 | } |
3104 | ||
67a4f2b7 AO |
3105 | eh->tlsdesc_got = (bfd_vma) -1; |
3106 | ||
bffbf940 JJ |
3107 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
3108 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
3109 | if (h->got.refcount > 0 | |
0e1862bb | 3110 | && bfd_link_executable (info) |
bffbf940 | 3111 | && h->dynindx == -1 |
351f65ca | 3112 | && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) |
d8045f23 NC |
3113 | { |
3114 | h->got.offset = (bfd_vma) -1; | |
3115 | } | |
bffbf940 | 3116 | else if (h->got.refcount > 0) |
c434dee6 AJ |
3117 | { |
3118 | asection *s; | |
b34976b6 | 3119 | bfd_boolean dyn; |
351f65ca | 3120 | int tls_type = elf_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
3121 | |
3122 | /* Make sure this symbol is output as a dynamic symbol. | |
3123 | Undefined weak syms won't yet be marked as dynamic. */ | |
3124 | if (h->dynindx == -1 | |
aec6b87e L |
3125 | && !h->forced_local |
3126 | && !resolved_to_zero) | |
c434dee6 | 3127 | { |
c152c796 | 3128 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 3129 | return FALSE; |
c434dee6 AJ |
3130 | } |
3131 | ||
67a4f2b7 AO |
3132 | if (GOT_TLS_GDESC_P (tls_type)) |
3133 | { | |
6de2ae4a | 3134 | eh->tlsdesc_got = htab->elf.sgotplt->size |
351f65ca | 3135 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 3136 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
3137 | h->got.offset = (bfd_vma) -2; |
3138 | } | |
3139 | if (! GOT_TLS_GDESC_P (tls_type) | |
3140 | || GOT_TLS_GD_P (tls_type)) | |
3141 | { | |
6de2ae4a | 3142 | s = htab->elf.sgot; |
67a4f2b7 AO |
3143 | h->got.offset = s->size; |
3144 | s->size += GOT_ENTRY_SIZE; | |
3145 | if (GOT_TLS_GD_P (tls_type)) | |
3146 | s->size += GOT_ENTRY_SIZE; | |
3147 | } | |
c434dee6 | 3148 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 | 3149 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
aec6b87e L |
3150 | and two if global. R_X86_64_GOTTPOFF needs one dynamic |
3151 | relocation. No dynamic relocation against resolved undefined | |
3152 | weak symbol in executable. */ | |
67a4f2b7 | 3153 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 3154 | || tls_type == GOT_TLS_IE) |
351f65ca | 3155 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 | 3156 | else if (GOT_TLS_GD_P (tls_type)) |
351f65ca | 3157 | htab->elf.srelgot->size += 2 * bed->s->sizeof_rela; |
67a4f2b7 | 3158 | else if (! GOT_TLS_GDESC_P (tls_type) |
aec6b87e L |
3159 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
3160 | && !resolved_to_zero) | |
67a4f2b7 | 3161 | || h->root.type != bfd_link_hash_undefweak) |
0e1862bb | 3162 | && (bfd_link_pic (info) |
27482721 | 3163 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
351f65ca | 3164 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
3165 | if (GOT_TLS_GDESC_P (tls_type)) |
3166 | { | |
351f65ca | 3167 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
3168 | htab->tlsdesc_plt = (bfd_vma) -1; |
3169 | } | |
c434dee6 AJ |
3170 | } |
3171 | else | |
3172 | h->got.offset = (bfd_vma) -1; | |
3173 | ||
c434dee6 | 3174 | if (eh->dyn_relocs == NULL) |
b34976b6 | 3175 | return TRUE; |
c434dee6 AJ |
3176 | |
3177 | /* In the shared -Bsymbolic case, discard space allocated for | |
3178 | dynamic pc-relative relocs against symbols which turn out to be | |
3179 | defined in regular objects. For the normal shared case, discard | |
3180 | space for pc-relative relocs that have become local due to symbol | |
3181 | visibility changes. */ | |
3182 | ||
0e1862bb | 3183 | if (bfd_link_pic (info)) |
c434dee6 | 3184 | { |
27482721 AJ |
3185 | /* Relocs that use pc_count are those that appear on a call |
3186 | insn, or certain REL relocs that can generated via assembly. | |
3187 | We want calls to protected symbols to resolve directly to the | |
3188 | function rather than going via the plt. If people want | |
3189 | function pointer comparisons to work as expected then they | |
3190 | should avoid writing weird assembly. */ | |
3191 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 3192 | { |
e03a8ed8 | 3193 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
3194 | |
3195 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
3196 | { | |
c3ce498c L |
3197 | p->count -= p->pc_count; |
3198 | p->pc_count = 0; | |
c434dee6 AJ |
3199 | if (p->count == 0) |
3200 | *pp = p->next; | |
3201 | else | |
3202 | pp = &p->next; | |
3203 | } | |
3204 | } | |
4e795f50 AM |
3205 | |
3206 | /* Also discard relocs on undefined weak syms with non-default | |
aec6b87e | 3207 | visibility or in PIE. */ |
31c0ebfe | 3208 | if (eh->dyn_relocs != NULL) |
22d606e9 | 3209 | { |
31c0ebfe L |
3210 | if (h->root.type == bfd_link_hash_undefweak) |
3211 | { | |
aec6b87e L |
3212 | /* Undefined weak symbol is never bound locally in shared |
3213 | library. */ | |
3214 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
3215 | || resolved_to_zero) | |
31c0ebfe | 3216 | eh->dyn_relocs = NULL; |
31c0ebfe L |
3217 | else if (h->dynindx == -1 |
3218 | && ! h->forced_local | |
3219 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
3220 | return FALSE; | |
3221 | } | |
9d1d54d5 L |
3222 | /* For PIE, discard space for pc-relative relocs against |
3223 | symbols which turn out to need copy relocs. */ | |
0e1862bb | 3224 | else if (bfd_link_executable (info) |
bc696fd5 | 3225 | && (h->needs_copy || eh->needs_copy) |
31c0ebfe L |
3226 | && h->def_dynamic |
3227 | && !h->def_regular) | |
9d1d54d5 L |
3228 | { |
3229 | struct elf_dyn_relocs **pp; | |
3230 | ||
3231 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
3232 | { | |
3233 | if (p->pc_count != 0) | |
3234 | *pp = p->next; | |
3235 | else | |
3236 | pp = &p->next; | |
3237 | } | |
3238 | } | |
22d606e9 | 3239 | } |
d8045f23 | 3240 | } |
d40d037c | 3241 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
3242 | { |
3243 | /* For the non-shared case, discard space for relocs against | |
3244 | symbols which turn out to need copy relocs or are not | |
04ebc307 L |
3245 | dynamic. Keep dynamic relocations for run-time function |
3246 | pointer initialization. */ | |
c434dee6 | 3247 | |
aec6b87e L |
3248 | if ((!h->non_got_ref |
3249 | || eh->func_pointer_refcount > 0 | |
3250 | || (h->root.type == bfd_link_hash_undefweak | |
3251 | && !resolved_to_zero)) | |
f5385ebf AM |
3252 | && ((h->def_dynamic |
3253 | && !h->def_regular) | |
c434dee6 AJ |
3254 | || (htab->elf.dynamic_sections_created |
3255 | && (h->root.type == bfd_link_hash_undefweak | |
3256 | || h->root.type == bfd_link_hash_undefined)))) | |
3257 | { | |
3258 | /* Make sure this symbol is output as a dynamic symbol. | |
3259 | Undefined weak syms won't yet be marked as dynamic. */ | |
3260 | if (h->dynindx == -1 | |
d8045f23 | 3261 | && ! h->forced_local |
aec6b87e | 3262 | && ! resolved_to_zero |
d8045f23 NC |
3263 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
3264 | return FALSE; | |
c434dee6 AJ |
3265 | |
3266 | /* If that succeeded, we know we'll be keeping all the | |
3267 | relocs. */ | |
3268 | if (h->dynindx != -1) | |
3269 | goto keep; | |
3270 | } | |
3271 | ||
3272 | eh->dyn_relocs = NULL; | |
04ebc307 | 3273 | eh->func_pointer_refcount = 0; |
c434dee6 AJ |
3274 | |
3275 | keep: ; | |
3276 | } | |
3277 | ||
3278 | /* Finally, allocate space. */ | |
3279 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
3280 | { | |
e7c33416 NC |
3281 | asection * sreloc; |
3282 | ||
cbe950e9 | 3283 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
3284 | |
3285 | BFD_ASSERT (sreloc != NULL); | |
3286 | ||
351f65ca | 3287 | sreloc->size += p->count * bed->s->sizeof_rela; |
c434dee6 AJ |
3288 | } |
3289 | ||
b34976b6 | 3290 | return TRUE; |
c434dee6 AJ |
3291 | } |
3292 | ||
c25bc9fc L |
3293 | /* Allocate space in .plt, .got and associated reloc sections for |
3294 | local dynamic relocs. */ | |
3295 | ||
3296 | static bfd_boolean | |
351f65ca | 3297 | elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf) |
c25bc9fc L |
3298 | { |
3299 | struct elf_link_hash_entry *h | |
3300 | = (struct elf_link_hash_entry *) *slot; | |
3301 | ||
3302 | if (h->type != STT_GNU_IFUNC | |
3303 | || !h->def_regular | |
3304 | || !h->ref_regular | |
3305 | || !h->forced_local | |
3306 | || h->root.type != bfd_link_hash_defined) | |
3307 | abort (); | |
3308 | ||
351f65ca | 3309 | return elf_x86_64_allocate_dynrelocs (h, inf); |
c25bc9fc L |
3310 | } |
3311 | ||
c434dee6 AJ |
3312 | /* Find any dynamic relocs that apply to read-only sections. */ |
3313 | ||
b34976b6 | 3314 | static bfd_boolean |
351f65ca L |
3315 | elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h, |
3316 | void * inf) | |
c434dee6 | 3317 | { |
351f65ca | 3318 | struct elf_x86_64_link_hash_entry *eh; |
e03a8ed8 | 3319 | struct elf_dyn_relocs *p; |
c434dee6 | 3320 | |
aa715242 L |
3321 | /* Skip local IFUNC symbols. */ |
3322 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
3323 | return TRUE; | |
3324 | ||
351f65ca | 3325 | eh = (struct elf_x86_64_link_hash_entry *) h; |
c434dee6 AJ |
3326 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
3327 | { | |
3328 | asection *s = p->sec->output_section; | |
3329 | ||
3330 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
3331 | { | |
3332 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
3333 | ||
3334 | info->flags |= DF_TEXTREL; | |
3335 | ||
0e1862bb | 3336 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd L |
3337 | || info->error_textrel) |
3338 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"), | |
b70321a2 L |
3339 | p->sec->owner, h->root.root.string, |
3340 | p->sec); | |
3341 | ||
c434dee6 | 3342 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 3343 | return FALSE; |
c434dee6 AJ |
3344 | } |
3345 | } | |
b34976b6 | 3346 | return TRUE; |
c434dee6 AJ |
3347 | } |
3348 | ||
c175a657 | 3349 | /* Convert load via the GOT slot to load immediate. */ |
daa67607 L |
3350 | |
3351 | static bfd_boolean | |
56ceb5b5 L |
3352 | elf_x86_64_convert_load (bfd *abfd, asection *sec, |
3353 | struct bfd_link_info *link_info) | |
daa67607 L |
3354 | { |
3355 | Elf_Internal_Shdr *symtab_hdr; | |
3356 | Elf_Internal_Rela *internal_relocs; | |
3357 | Elf_Internal_Rela *irel, *irelend; | |
3358 | bfd_byte *contents; | |
3359 | struct elf_x86_64_link_hash_table *htab; | |
c175a657 | 3360 | bfd_boolean changed; |
daa67607 L |
3361 | bfd_signed_vma *local_got_refcounts; |
3362 | ||
3363 | /* Don't even try to convert non-ELF outputs. */ | |
3364 | if (!is_elf_hash_table (link_info->hash)) | |
3365 | return FALSE; | |
3366 | ||
c1d11331 | 3367 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 3368 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
56ceb5b5 | 3369 | || sec->need_convert_load == 0 |
c8831961 | 3370 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
3371 | return TRUE; |
3372 | ||
3373 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3374 | ||
3375 | /* Load the relocations for this section. */ | |
3376 | internal_relocs = (_bfd_elf_link_read_relocs | |
3377 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
3378 | link_info->keep_memory)); | |
3379 | if (internal_relocs == NULL) | |
3380 | return FALSE; | |
3381 | ||
c175a657 | 3382 | changed = FALSE; |
daa67607 | 3383 | htab = elf_x86_64_hash_table (link_info); |
daa67607 L |
3384 | local_got_refcounts = elf_local_got_refcounts (abfd); |
3385 | ||
3386 | /* Get the section contents. */ | |
3387 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
3388 | contents = elf_section_data (sec)->this_hdr.contents; | |
3389 | else | |
3390 | { | |
3391 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
3392 | goto error_return; | |
3393 | } | |
3394 | ||
3395 | irelend = internal_relocs + sec->reloc_count; | |
3396 | for (irel = internal_relocs; irel < irelend; irel++) | |
3397 | { | |
3398 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
c175a657 | 3399 | unsigned int r_symndx; |
daa67607 | 3400 | struct elf_link_hash_entry *h; |
c175a657 | 3401 | bfd_boolean converted; |
59cab532 | 3402 | |
c175a657 L |
3403 | if (r_type != R_X86_64_GOTPCRELX |
3404 | && r_type != R_X86_64_REX_GOTPCRELX | |
3405 | && r_type != R_X86_64_GOTPCREL) | |
dfc87947 L |
3406 | continue; |
3407 | ||
c175a657 | 3408 | r_symndx = htab->r_sym (irel->r_info); |
daa67607 | 3409 | if (r_symndx < symtab_hdr->sh_info) |
c175a657 L |
3410 | h = elf_x86_64_get_local_sym_hash (htab, sec->owner, |
3411 | (const Elf_Internal_Rela *) irel, | |
3412 | FALSE); | |
59cab532 L |
3413 | else |
3414 | { | |
c175a657 | 3415 | h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info]; |
59cab532 L |
3416 | while (h->root.type == bfd_link_hash_indirect |
3417 | || h->root.type == bfd_link_hash_warning) | |
3418 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
59cab532 L |
3419 | } |
3420 | ||
c175a657 L |
3421 | /* STT_GNU_IFUNC must keep GOTPCREL relocations. */ |
3422 | if (h != NULL && h->type == STT_GNU_IFUNC) | |
3423 | continue; | |
daa67607 | 3424 | |
c175a657 L |
3425 | converted = FALSE; |
3426 | if (!elf_x86_64_convert_load_reloc (abfd, sec, contents, irel, h, | |
3427 | &converted, link_info)) | |
3428 | goto error_return; | |
56ceb5b5 | 3429 | |
c175a657 | 3430 | if (converted) |
56ceb5b5 | 3431 | { |
c175a657 L |
3432 | changed = converted; |
3433 | if (h) | |
56ceb5b5 | 3434 | { |
c175a657 L |
3435 | if (h->got.refcount > 0) |
3436 | h->got.refcount -= 1; | |
56ceb5b5 L |
3437 | } |
3438 | else | |
3439 | { | |
c175a657 L |
3440 | if (local_got_refcounts != NULL |
3441 | && local_got_refcounts[r_symndx] > 0) | |
3442 | local_got_refcounts[r_symndx] -= 1; | |
56ceb5b5 | 3443 | } |
daa67607 L |
3444 | } |
3445 | } | |
3446 | ||
3447 | if (contents != NULL | |
3448 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3449 | { | |
c175a657 | 3450 | if (!changed && !link_info->keep_memory) |
daa67607 L |
3451 | free (contents); |
3452 | else | |
3453 | { | |
3454 | /* Cache the section contents for elf_link_input_bfd. */ | |
3455 | elf_section_data (sec)->this_hdr.contents = contents; | |
3456 | } | |
3457 | } | |
3458 | ||
3459 | if (elf_section_data (sec)->relocs != internal_relocs) | |
3460 | { | |
c175a657 | 3461 | if (!changed) |
daa67607 L |
3462 | free (internal_relocs); |
3463 | else | |
3464 | elf_section_data (sec)->relocs = internal_relocs; | |
3465 | } | |
3466 | ||
3467 | return TRUE; | |
3468 | ||
3469 | error_return: | |
3470 | if (contents != NULL | |
3471 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3472 | free (contents); | |
3473 | if (internal_relocs != NULL | |
3474 | && elf_section_data (sec)->relocs != internal_relocs) | |
3475 | free (internal_relocs); | |
3476 | return FALSE; | |
3477 | } | |
3478 | ||
70256ad8 AJ |
3479 | /* Set the sizes of the dynamic sections. */ |
3480 | ||
b34976b6 | 3481 | static bfd_boolean |
351f65ca L |
3482 | elf_x86_64_size_dynamic_sections (bfd *output_bfd, |
3483 | struct bfd_link_info *info) | |
70256ad8 | 3484 | { |
351f65ca | 3485 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
3486 | bfd *dynobj; |
3487 | asection *s; | |
b34976b6 | 3488 | bfd_boolean relocs; |
c434dee6 | 3489 | bfd *ibfd; |
351f65ca | 3490 | const struct elf_backend_data *bed; |
70256ad8 | 3491 | |
351f65ca | 3492 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3493 | if (htab == NULL) |
3494 | return FALSE; | |
351f65ca | 3495 | bed = get_elf_backend_data (output_bfd); |
4dfe6ac6 | 3496 | |
c434dee6 AJ |
3497 | dynobj = htab->elf.dynobj; |
3498 | if (dynobj == NULL) | |
3499 | abort (); | |
70256ad8 | 3500 | |
c434dee6 AJ |
3501 | /* Set up .got offsets for local syms, and space for local dynamic |
3502 | relocs. */ | |
c72f2fb2 | 3503 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
70256ad8 | 3504 | { |
c434dee6 AJ |
3505 | bfd_signed_vma *local_got; |
3506 | bfd_signed_vma *end_local_got; | |
bffbf940 | 3507 | char *local_tls_type; |
67a4f2b7 | 3508 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
3509 | bfd_size_type locsymcount; |
3510 | Elf_Internal_Shdr *symtab_hdr; | |
3511 | asection *srel; | |
70256ad8 | 3512 | |
0ffa91dd | 3513 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
3514 | continue; |
3515 | ||
c434dee6 | 3516 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 3517 | { |
e03a8ed8 | 3518 | struct elf_dyn_relocs *p; |
c434dee6 | 3519 | |
56ceb5b5 | 3520 | if (!elf_x86_64_convert_load (ibfd, s, info)) |
daa67607 L |
3521 | return FALSE; |
3522 | ||
e03a8ed8 | 3523 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 3524 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
3525 | p != NULL; |
3526 | p = p->next) | |
70256ad8 | 3527 | { |
c434dee6 AJ |
3528 | if (!bfd_is_abs_section (p->sec) |
3529 | && bfd_is_abs_section (p->sec->output_section)) | |
3530 | { | |
3531 | /* Input section has been discarded, either because | |
3532 | it is a copy of a linkonce section or due to | |
3533 | linker script /DISCARD/, so we'll be discarding | |
3534 | the relocs too. */ | |
3535 | } | |
3536 | else if (p->count != 0) | |
3537 | { | |
3538 | srel = elf_section_data (p->sec)->sreloc; | |
351f65ca | 3539 | srel->size += p->count * bed->s->sizeof_rela; |
4b819e1f L |
3540 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
3541 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
3542 | { |
3543 | info->flags |= DF_TEXTREL; | |
0e1862bb | 3544 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd L |
3545 | || info->error_textrel) |
3546 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), | |
b70321a2 | 3547 | p->sec->owner, p->sec); |
b70321a2 | 3548 | } |
c434dee6 | 3549 | } |
70256ad8 AJ |
3550 | } |
3551 | } | |
c434dee6 AJ |
3552 | |
3553 | local_got = elf_local_got_refcounts (ibfd); | |
3554 | if (!local_got) | |
3555 | continue; | |
3556 | ||
0ffa91dd | 3557 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
3558 | locsymcount = symtab_hdr->sh_info; |
3559 | end_local_got = local_got + locsymcount; | |
351f65ca L |
3560 | local_tls_type = elf_x86_64_local_got_tls_type (ibfd); |
3561 | local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd); | |
6de2ae4a L |
3562 | s = htab->elf.sgot; |
3563 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
3564 | for (; local_got < end_local_got; |
3565 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 3566 | { |
67a4f2b7 | 3567 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 3568 | if (*local_got > 0) |
70256ad8 | 3569 | { |
67a4f2b7 AO |
3570 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
3571 | { | |
6de2ae4a | 3572 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
351f65ca | 3573 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 3574 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
3575 | *local_got = (bfd_vma) -2; |
3576 | } | |
3577 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3578 | || GOT_TLS_GD_P (*local_tls_type)) | |
3579 | { | |
3580 | *local_got = s->size; | |
3581 | s->size += GOT_ENTRY_SIZE; | |
3582 | if (GOT_TLS_GD_P (*local_tls_type)) | |
3583 | s->size += GOT_ENTRY_SIZE; | |
3584 | } | |
0e1862bb | 3585 | if (bfd_link_pic (info) |
67a4f2b7 | 3586 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 3587 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
3588 | { |
3589 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
3590 | { | |
6de2ae4a | 3591 | htab->elf.srelplt->size |
351f65ca | 3592 | += bed->s->sizeof_rela; |
67a4f2b7 AO |
3593 | htab->tlsdesc_plt = (bfd_vma) -1; |
3594 | } | |
3595 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3596 | || GOT_TLS_GD_P (*local_tls_type)) | |
351f65ca | 3597 | srel->size += bed->s->sizeof_rela; |
67a4f2b7 | 3598 | } |
70256ad8 AJ |
3599 | } |
3600 | else | |
c434dee6 AJ |
3601 | *local_got = (bfd_vma) -1; |
3602 | } | |
3603 | } | |
70256ad8 | 3604 | |
bffbf940 JJ |
3605 | if (htab->tls_ld_got.refcount > 0) |
3606 | { | |
3607 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
3608 | relocs. */ | |
6de2ae4a L |
3609 | htab->tls_ld_got.offset = htab->elf.sgot->size; |
3610 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; | |
351f65ca | 3611 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
bffbf940 JJ |
3612 | } |
3613 | else | |
3614 | htab->tls_ld_got.offset = -1; | |
3615 | ||
c434dee6 AJ |
3616 | /* Allocate global sym .plt and .got entries, and space for global |
3617 | sym dynamic relocs. */ | |
351f65ca | 3618 | elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs, |
eb4ff4d6 | 3619 | info); |
c434dee6 | 3620 | |
c25bc9fc L |
3621 | /* Allocate .plt and .got entries, and space for local symbols. */ |
3622 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 3623 | elf_x86_64_allocate_local_dynrelocs, |
c25bc9fc L |
3624 | info); |
3625 | ||
67a4f2b7 AO |
3626 | /* For every jump slot reserved in the sgotplt, reloc_count is |
3627 | incremented. However, when we reserve space for TLS descriptors, | |
3628 | it's not incremented, so in order to compute the space reserved | |
3629 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 L |
3630 | slot size. |
3631 | ||
3632 | PR ld/13302: We start next_irelative_index at the end of .rela.plt | |
3633 | so that R_X86_64_IRELATIVE entries come last. */ | |
6de2ae4a | 3634 | if (htab->elf.srelplt) |
e1f98742 L |
3635 | { |
3636 | htab->sgotplt_jump_table_size | |
3637 | = elf_x86_64_compute_jump_table_size (htab); | |
3638 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
3639 | } | |
3640 | else if (htab->elf.irelplt) | |
3641 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
67a4f2b7 AO |
3642 | |
3643 | if (htab->tlsdesc_plt) | |
3644 | { | |
3645 | /* If we're not using lazy TLS relocations, don't generate the | |
3646 | PLT and GOT entries they require. */ | |
3647 | if ((info->flags & DF_BIND_NOW)) | |
3648 | htab->tlsdesc_plt = 0; | |
3649 | else | |
3650 | { | |
6de2ae4a L |
3651 | htab->tlsdesc_got = htab->elf.sgot->size; |
3652 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
3653 | /* Reserve room for the initial entry. |
3654 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a | 3655 | if (htab->elf.splt->size == 0) |
eed180f8 | 3656 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
6de2ae4a | 3657 | htab->tlsdesc_plt = htab->elf.splt->size; |
eed180f8 | 3658 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
67a4f2b7 AO |
3659 | } |
3660 | } | |
3661 | ||
a7b16ceb L |
3662 | if (htab->elf.sgotplt) |
3663 | { | |
3664 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
eed180f8 | 3665 | entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
3666 | if ((htab->elf.hgot == NULL |
3667 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
3668 | && (htab->elf.sgotplt->size |
3669 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
3670 | && (htab->elf.splt == NULL |
3671 | || htab->elf.splt->size == 0) | |
3672 | && (htab->elf.sgot == NULL | |
3673 | || htab->elf.sgot->size == 0) | |
3674 | && (htab->elf.iplt == NULL | |
3675 | || htab->elf.iplt->size == 0) | |
3676 | && (htab->elf.igotplt == NULL | |
3677 | || htab->elf.igotplt->size == 0)) | |
3678 | htab->elf.sgotplt->size = 0; | |
3679 | } | |
3680 | ||
9a2a56cc AM |
3681 | if (htab->plt_eh_frame != NULL |
3682 | && htab->elf.splt != NULL | |
3683 | && htab->elf.splt->size != 0 | |
3684 | && !bfd_is_abs_section (htab->elf.splt->output_section) | |
3685 | && _bfd_elf_eh_frame_present (info)) | |
3686 | { | |
3687 | const struct elf_x86_64_backend_data *arch_data | |
f8222080 | 3688 | = get_elf_x86_64_arch_data (bed); |
9a2a56cc AM |
3689 | htab->plt_eh_frame->size = arch_data->eh_frame_plt_size; |
3690 | } | |
3691 | ||
c434dee6 AJ |
3692 | /* We now have determined the sizes of the various dynamic sections. |
3693 | Allocate memory for them. */ | |
b34976b6 | 3694 | relocs = FALSE; |
c434dee6 AJ |
3695 | for (s = dynobj->sections; s != NULL; s = s->next) |
3696 | { | |
3697 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3698 | continue; | |
3699 | ||
6de2ae4a L |
3700 | if (s == htab->elf.splt |
3701 | || s == htab->elf.sgot | |
3702 | || s == htab->elf.sgotplt | |
3703 | || s == htab->elf.iplt | |
3704 | || s == htab->elf.igotplt | |
0ff2b86e | 3705 | || s == htab->plt_bnd |
dd7e64d4 | 3706 | || s == htab->plt_got |
9a2a56cc | 3707 | || s == htab->plt_eh_frame |
75ff4589 | 3708 | || s == htab->sdynbss) |
c434dee6 AJ |
3709 | { |
3710 | /* Strip this section if we don't need it; see the | |
3711 | comment below. */ | |
3712 | } | |
0112cd26 | 3713 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 3714 | { |
6de2ae4a | 3715 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 3716 | relocs = TRUE; |
c434dee6 AJ |
3717 | |
3718 | /* We use the reloc_count field as a counter if we need | |
3719 | to copy relocs into the output file. */ | |
6de2ae4a | 3720 | if (s != htab->elf.srelplt) |
67a4f2b7 | 3721 | s->reloc_count = 0; |
70256ad8 | 3722 | } |
c434dee6 | 3723 | else |
70256ad8 AJ |
3724 | { |
3725 | /* It's not one of our sections, so don't allocate space. */ | |
3726 | continue; | |
3727 | } | |
3728 | ||
eea6121a | 3729 | if (s->size == 0) |
70256ad8 | 3730 | { |
c434dee6 AJ |
3731 | /* If we don't need this section, strip it from the |
3732 | output file. This is mostly to handle .rela.bss and | |
3733 | .rela.plt. We must create both sections in | |
3734 | create_dynamic_sections, because they must be created | |
3735 | before the linker maps input sections to output | |
3736 | sections. The linker does that before | |
3737 | adjust_dynamic_symbol is called, and it is that | |
3738 | function which decides whether anything needs to go | |
3739 | into these sections. */ | |
3740 | ||
8423293d | 3741 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
3742 | continue; |
3743 | } | |
3744 | ||
c456f082 AM |
3745 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3746 | continue; | |
3747 | ||
70256ad8 AJ |
3748 | /* Allocate memory for the section contents. We use bfd_zalloc |
3749 | here in case unused entries are not reclaimed before the | |
3750 | section's contents are written out. This should not happen, | |
3751 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
3752 | of garbage. */ | |
eea6121a | 3753 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 3754 | if (s->contents == NULL) |
b34976b6 | 3755 | return FALSE; |
70256ad8 AJ |
3756 | } |
3757 | ||
e41b3a13 | 3758 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3759 | && htab->plt_eh_frame->contents != NULL) |
3760 | { | |
3761 | const struct elf_x86_64_backend_data *arch_data | |
f8222080 | 3762 | = get_elf_x86_64_arch_data (bed); |
9a2a56cc AM |
3763 | |
3764 | memcpy (htab->plt_eh_frame->contents, | |
3765 | arch_data->eh_frame_plt, htab->plt_eh_frame->size); | |
3766 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
3767 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
3768 | } | |
e41b3a13 | 3769 | |
c434dee6 | 3770 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
3771 | { |
3772 | /* Add some entries to the .dynamic section. We fill in the | |
351f65ca | 3773 | values later, in elf_x86_64_finish_dynamic_sections, but we |
70256ad8 | 3774 | must add the entries now so that we get the correct size for |
407443a3 | 3775 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 3776 | dynamic linker and used by the debugger. */ |
dc810e39 | 3777 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3778 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3779 | |
0e1862bb | 3780 | if (bfd_link_executable (info)) |
70256ad8 | 3781 | { |
dc810e39 | 3782 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3783 | return FALSE; |
70256ad8 AJ |
3784 | } |
3785 | ||
6de2ae4a | 3786 | if (htab->elf.splt->size != 0) |
70256ad8 | 3787 | { |
7c1e8d3e L |
3788 | /* DT_PLTGOT is used by prelink even if there is no PLT |
3789 | relocation. */ | |
3790 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
b34976b6 | 3791 | return FALSE; |
67a4f2b7 | 3792 | |
7c1e8d3e L |
3793 | if (htab->elf.srelplt->size != 0) |
3794 | { | |
3795 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
3796 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
3797 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
3798 | return FALSE; | |
3799 | } | |
3800 | ||
67a4f2b7 AO |
3801 | if (htab->tlsdesc_plt |
3802 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
3803 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
3804 | return FALSE; | |
70256ad8 AJ |
3805 | } |
3806 | ||
3807 | if (relocs) | |
3808 | { | |
dc810e39 AM |
3809 | if (!add_dynamic_entry (DT_RELA, 0) |
3810 | || !add_dynamic_entry (DT_RELASZ, 0) | |
351f65ca | 3811 | || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela)) |
b34976b6 | 3812 | return FALSE; |
70256ad8 | 3813 | |
c434dee6 AJ |
3814 | /* If any dynamic relocs apply to a read-only section, |
3815 | then we need a DT_TEXTREL entry. */ | |
3816 | if ((info->flags & DF_TEXTREL) == 0) | |
eed180f8 | 3817 | elf_link_hash_traverse (&htab->elf, |
351f65ca | 3818 | elf_x86_64_readonly_dynrelocs, |
eb4ff4d6 | 3819 | info); |
c434dee6 AJ |
3820 | |
3821 | if ((info->flags & DF_TEXTREL) != 0) | |
3822 | { | |
2df3368d | 3823 | if (htab->readonly_dynrelocs_against_ifunc) |
8efa2874 L |
3824 | { |
3825 | info->callbacks->einfo | |
3826 | (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n")); | |
3827 | bfd_set_error (bfd_error_bad_value); | |
3828 | return FALSE; | |
3829 | } | |
3830 | ||
c434dee6 | 3831 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 3832 | return FALSE; |
c434dee6 | 3833 | } |
70256ad8 AJ |
3834 | } |
3835 | } | |
dc810e39 | 3836 | #undef add_dynamic_entry |
70256ad8 | 3837 | |
b34976b6 | 3838 | return TRUE; |
70256ad8 AJ |
3839 | } |
3840 | ||
67a4f2b7 | 3841 | static bfd_boolean |
351f65ca L |
3842 | elf_x86_64_always_size_sections (bfd *output_bfd, |
3843 | struct bfd_link_info *info) | |
67a4f2b7 AO |
3844 | { |
3845 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3846 | ||
3847 | if (tls_sec) | |
3848 | { | |
3849 | struct elf_link_hash_entry *tlsbase; | |
3850 | ||
3851 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3852 | "_TLS_MODULE_BASE_", | |
3853 | FALSE, FALSE, FALSE); | |
3854 | ||
3855 | if (tlsbase && tlsbase->type == STT_TLS) | |
3856 | { | |
351f65ca | 3857 | struct elf_x86_64_link_hash_table *htab; |
67a4f2b7 AO |
3858 | struct bfd_link_hash_entry *bh = NULL; |
3859 | const struct elf_backend_data *bed | |
3860 | = get_elf_backend_data (output_bfd); | |
3861 | ||
351f65ca | 3862 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3863 | if (htab == NULL) |
3864 | return FALSE; | |
3865 | ||
67a4f2b7 AO |
3866 | if (!(_bfd_generic_link_add_one_symbol |
3867 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3868 | tls_sec, 0, NULL, FALSE, | |
3869 | bed->collect, &bh))) | |
3870 | return FALSE; | |
9f03412a | 3871 | |
4dfe6ac6 | 3872 | htab->tls_module_base = bh; |
9f03412a | 3873 | |
67a4f2b7 AO |
3874 | tlsbase = (struct elf_link_hash_entry *)bh; |
3875 | tlsbase->def_regular = 1; | |
3876 | tlsbase->other = STV_HIDDEN; | |
576fa883 | 3877 | tlsbase->root.linker_def = 1; |
67a4f2b7 AO |
3878 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
3879 | } | |
3880 | } | |
3881 | ||
3882 | return TRUE; | |
3883 | } | |
3884 | ||
9f03412a AO |
3885 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
3886 | executables. Rather than setting it to the beginning of the TLS | |
3887 | section, we have to set it to the end. This function may be called | |
3888 | multiple times, it is idempotent. */ | |
3889 | ||
3890 | static void | |
351f65ca | 3891 | elf_x86_64_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 3892 | { |
351f65ca | 3893 | struct elf_x86_64_link_hash_table *htab; |
9f03412a AO |
3894 | struct bfd_link_hash_entry *base; |
3895 | ||
0e1862bb | 3896 | if (!bfd_link_executable (info)) |
9f03412a AO |
3897 | return; |
3898 | ||
351f65ca | 3899 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3900 | if (htab == NULL) |
3901 | return; | |
9f03412a | 3902 | |
4dfe6ac6 NC |
3903 | base = htab->tls_module_base; |
3904 | if (base == NULL) | |
9f03412a AO |
3905 | return; |
3906 | ||
4dfe6ac6 | 3907 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
3908 | } |
3909 | ||
bffbf940 JJ |
3910 | /* Return the base VMA address which should be subtracted from real addresses |
3911 | when resolving @dtpoff relocation. | |
3912 | This is PT_TLS segment p_vaddr. */ | |
3913 | ||
3914 | static bfd_vma | |
351f65ca | 3915 | elf_x86_64_dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 3916 | { |
e1918d23 AM |
3917 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3918 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 3919 | return 0; |
e1918d23 | 3920 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
3921 | } |
3922 | ||
3923 | /* Return the relocation value for @tpoff relocation | |
3924 | if STT_TLS virtual address is ADDRESS. */ | |
3925 | ||
3926 | static bfd_vma | |
351f65ca | 3927 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 3928 | { |
e1918d23 | 3929 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3930 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3931 | bfd_vma static_tls_size; | |
bffbf940 JJ |
3932 | |
3933 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 3934 | if (htab->tls_sec == NULL) |
bffbf940 | 3935 | return 0; |
7dc98aea RO |
3936 | |
3937 | /* Consider special static TLS alignment requirements. */ | |
3938 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3939 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
3940 | } |
3941 | ||
90f487df L |
3942 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
3943 | branch? */ | |
3944 | ||
3945 | static bfd_boolean | |
3946 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
3947 | { | |
3948 | /* Opcode Instruction | |
3949 | 0xe8 call | |
3950 | 0xe9 jump | |
3951 | 0x0f 0x8x conditional jump */ | |
3952 | return ((offset > 0 | |
3953 | && (contents [offset - 1] == 0xe8 | |
3954 | || contents [offset - 1] == 0xe9)) | |
3955 | || (offset > 1 | |
3956 | && contents [offset - 2] == 0x0f | |
3957 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
3958 | } | |
3959 | ||
8d88c4ca NC |
3960 | /* Relocate an x86_64 ELF section. */ |
3961 | ||
b34976b6 | 3962 | static bfd_boolean |
351f65ca L |
3963 | elf_x86_64_relocate_section (bfd *output_bfd, |
3964 | struct bfd_link_info *info, | |
3965 | bfd *input_bfd, | |
3966 | asection *input_section, | |
3967 | bfd_byte *contents, | |
3968 | Elf_Internal_Rela *relocs, | |
3969 | Elf_Internal_Sym *local_syms, | |
3970 | asection **local_sections) | |
8d88c4ca | 3971 | { |
351f65ca | 3972 | struct elf_x86_64_link_hash_table *htab; |
8d88c4ca NC |
3973 | Elf_Internal_Shdr *symtab_hdr; |
3974 | struct elf_link_hash_entry **sym_hashes; | |
3975 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3976 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 3977 | Elf_Internal_Rela *rel; |
60f2e42e | 3978 | Elf_Internal_Rela *wrel; |
8d88c4ca | 3979 | Elf_Internal_Rela *relend; |
eed180f8 | 3980 | const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
8d88c4ca | 3981 | |
0ffa91dd NC |
3982 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
3983 | ||
338c190a L |
3984 | /* Skip if check_relocs failed. */ |
3985 | if (input_section->check_relocs_failed) | |
3986 | return FALSE; | |
3987 | ||
351f65ca | 3988 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3989 | if (htab == NULL) |
3990 | return FALSE; | |
0ffa91dd | 3991 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
3992 | sym_hashes = elf_sym_hashes (input_bfd); |
3993 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
351f65ca | 3994 | local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 3995 | |
351f65ca | 3996 | elf_x86_64_set_tls_module_base (info); |
9f03412a | 3997 | |
60f2e42e | 3998 | rel = wrel = relocs; |
8d88c4ca | 3999 | relend = relocs + input_section->reloc_count; |
60f2e42e | 4000 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 4001 | { |
bffbf940 | 4002 | unsigned int r_type; |
8d88c4ca NC |
4003 | reloc_howto_type *howto; |
4004 | unsigned long r_symndx; | |
4005 | struct elf_link_hash_entry *h; | |
0ff2b86e | 4006 | struct elf_x86_64_link_hash_entry *eh; |
8d88c4ca NC |
4007 | Elf_Internal_Sym *sym; |
4008 | asection *sec; | |
0ff2b86e | 4009 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 4010 | bfd_vma relocation; |
b34976b6 | 4011 | bfd_boolean unresolved_reloc; |
8d88c4ca | 4012 | bfd_reloc_status_type r; |
bffbf940 | 4013 | int tls_type; |
0ff2b86e | 4014 | asection *base_got, *resolved_plt; |
1788fc08 | 4015 | bfd_vma st_size; |
aec6b87e | 4016 | bfd_boolean resolved_to_zero; |
8d88c4ca | 4017 | |
351f65ca | 4018 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
4019 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
4020 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
4021 | { |
4022 | if (wrel != rel) | |
4023 | *wrel = *rel; | |
4024 | continue; | |
4025 | } | |
8d88c4ca | 4026 | |
9911c0fc | 4027 | if (r_type >= (int) R_X86_64_standard) |
8da6118f | 4028 | { |
9911c0fc L |
4029 | (*_bfd_error_handler) |
4030 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), | |
4031 | input_bfd, input_section, r_type); | |
8da6118f | 4032 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 4033 | return FALSE; |
8da6118f | 4034 | } |
8d88c4ca | 4035 | |
d7921315 | 4036 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 4037 | || ABI_64_P (output_bfd)) |
d7921315 L |
4038 | howto = x86_64_elf_howto_table + r_type; |
4039 | else | |
4040 | howto = (x86_64_elf_howto_table | |
4041 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 4042 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
4043 | h = NULL; |
4044 | sym = NULL; | |
4045 | sec = NULL; | |
b34976b6 | 4046 | unresolved_reloc = FALSE; |
8d88c4ca | 4047 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
4048 | { |
4049 | sym = local_syms + r_symndx; | |
4050 | sec = local_sections[r_symndx]; | |
c434dee6 | 4051 | |
c25bc9fc L |
4052 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
4053 | &sec, rel); | |
1788fc08 | 4054 | st_size = sym->st_size; |
c25bc9fc L |
4055 | |
4056 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 4057 | if (!bfd_link_relocatable (info) |
351f65ca | 4058 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 4059 | { |
351f65ca L |
4060 | h = elf_x86_64_get_local_sym_hash (htab, input_bfd, |
4061 | rel, FALSE); | |
c25bc9fc L |
4062 | if (h == NULL) |
4063 | abort (); | |
4064 | ||
eed180f8 | 4065 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
4066 | h->root.u.def.value = sym->st_value; |
4067 | h->root.u.def.section = sec; | |
4068 | } | |
8da6118f | 4069 | } |
8d88c4ca | 4070 | else |
8da6118f | 4071 | { |
c9736ba0 | 4072 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 4073 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
c434dee6 | 4074 | |
b2a8e766 AM |
4075 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
4076 | r_symndx, symtab_hdr, sym_hashes, | |
4077 | h, sec, relocation, | |
62d887d4 | 4078 | unresolved_reloc, warned, ignored); |
1788fc08 | 4079 | st_size = h->size; |
8da6118f | 4080 | } |
ab96bf03 | 4081 | |
dbaa2011 | 4082 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
4083 | { |
4084 | _bfd_clear_contents (howto, input_bfd, input_section, | |
4085 | contents + rel->r_offset); | |
4086 | wrel->r_offset = rel->r_offset; | |
4087 | wrel->r_info = 0; | |
4088 | wrel->r_addend = 0; | |
4089 | ||
4090 | /* For ld -r, remove relocations in debug sections against | |
4091 | sections defined in discarded sections. Not done for | |
4092 | eh_frame editing code expects to be present. */ | |
4093 | if (bfd_link_relocatable (info) | |
4094 | && (input_section->flags & SEC_DEBUGGING)) | |
4095 | wrel--; | |
4096 | ||
4097 | continue; | |
4098 | } | |
ab96bf03 | 4099 | |
0e1862bb | 4100 | if (bfd_link_relocatable (info)) |
2d5da473 L |
4101 | { |
4102 | if (wrel != rel) | |
4103 | *wrel = *rel; | |
4104 | continue; | |
4105 | } | |
ab96bf03 | 4106 | |
1788fc08 | 4107 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 4108 | { |
1788fc08 L |
4109 | if (r_type == R_X86_64_64) |
4110 | { | |
4111 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
4112 | zero-extend it to 64bit if addend is zero. */ | |
4113 | r_type = R_X86_64_32; | |
4114 | memset (contents + rel->r_offset + 4, 0, 4); | |
4115 | } | |
4116 | else if (r_type == R_X86_64_SIZE64) | |
4117 | { | |
4118 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
4119 | zero-extend it to 64bit if addend is zero. */ | |
4120 | r_type = R_X86_64_SIZE32; | |
4121 | memset (contents + rel->r_offset + 4, 0, 4); | |
4122 | } | |
64d25c44 L |
4123 | } |
4124 | ||
0ff2b86e L |
4125 | eh = (struct elf_x86_64_link_hash_entry *) h; |
4126 | ||
cbe950e9 L |
4127 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
4128 | it here if it is defined in a non-shared object. */ | |
4129 | if (h != NULL | |
4130 | && h->type == STT_GNU_IFUNC | |
4131 | && h->def_regular) | |
4132 | { | |
cbe950e9 | 4133 | bfd_vma plt_index; |
4c544807 | 4134 | const char *name; |
cbe950e9 | 4135 | |
97dc35c8 L |
4136 | if ((input_section->flags & SEC_ALLOC) == 0) |
4137 | { | |
4138 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
4139 | sections because such sections are not SEC_ALLOC and | |
4140 | thus ld.so will not process them. */ | |
4141 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 4142 | continue; |
97dc35c8 L |
4143 | abort (); |
4144 | } | |
4145 | else if (h->plt.offset == (bfd_vma) -1) | |
cbe950e9 L |
4146 | abort (); |
4147 | ||
4148 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
4149 | if (htab->elf.splt != NULL) |
4150 | { | |
4151 | if (htab->plt_bnd != NULL) | |
4152 | { | |
4153 | resolved_plt = htab->plt_bnd; | |
4154 | plt_offset = eh->plt_bnd.offset; | |
4155 | } | |
4156 | else | |
4157 | { | |
4158 | resolved_plt = htab->elf.splt; | |
4159 | plt_offset = h->plt.offset; | |
4160 | } | |
4161 | } | |
4162 | else | |
4163 | { | |
4164 | resolved_plt = htab->elf.iplt; | |
4165 | plt_offset = h->plt.offset; | |
4166 | } | |
4167 | ||
4168 | relocation = (resolved_plt->output_section->vma | |
4169 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
4170 | |
4171 | switch (r_type) | |
4172 | { | |
4173 | default: | |
4c544807 L |
4174 | if (h->root.root.string) |
4175 | name = h->root.root.string; | |
4176 | else | |
4177 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
4178 | NULL); | |
cbe950e9 L |
4179 | (*_bfd_error_handler) |
4180 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
4181 | "symbol `%s' isn't handled by %s"), input_bfd, | |
ef77d6af | 4182 | howto->name, name, __FUNCTION__); |
cbe950e9 L |
4183 | bfd_set_error (bfd_error_bad_value); |
4184 | return FALSE; | |
4185 | ||
4186 | case R_X86_64_32S: | |
0e1862bb | 4187 | if (bfd_link_pic (info)) |
cbe950e9 | 4188 | abort (); |
710ab287 L |
4189 | goto do_relocation; |
4190 | ||
248775ba L |
4191 | case R_X86_64_32: |
4192 | if (ABI_64_P (output_bfd)) | |
4193 | goto do_relocation; | |
17672001 | 4194 | /* FALLTHROUGH */ |
eed180f8 | 4195 | case R_X86_64_64: |
710ab287 L |
4196 | if (rel->r_addend != 0) |
4197 | { | |
4c544807 L |
4198 | if (h->root.root.string) |
4199 | name = h->root.root.string; | |
4200 | else | |
4201 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
4202 | sym, NULL); | |
710ab287 L |
4203 | (*_bfd_error_handler) |
4204 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
4205 | "symbol `%s' has non-zero addend: %d"), | |
ef77d6af | 4206 | input_bfd, howto->name, name, rel->r_addend); |
710ab287 L |
4207 | bfd_set_error (bfd_error_bad_value); |
4208 | return FALSE; | |
4209 | } | |
4210 | ||
4211 | /* Generate dynamic relcoation only when there is a | |
c293fa49 | 4212 | non-GOT reference in a shared object. */ |
0e1862bb | 4213 | if (bfd_link_pic (info) && h->non_got_ref) |
710ab287 L |
4214 | { |
4215 | Elf_Internal_Rela outrel; | |
710ab287 L |
4216 | asection *sreloc; |
4217 | ||
c25bc9fc L |
4218 | /* Need a dynamic relocation to get the real function |
4219 | address. */ | |
710ab287 L |
4220 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
4221 | info, | |
4222 | input_section, | |
4223 | rel->r_offset); | |
4224 | if (outrel.r_offset == (bfd_vma) -1 | |
4225 | || outrel.r_offset == (bfd_vma) -2) | |
4226 | abort (); | |
4227 | ||
4228 | outrel.r_offset += (input_section->output_section->vma | |
4229 | + input_section->output_offset); | |
4230 | ||
4231 | if (h->dynindx == -1 | |
44c4ea11 | 4232 | || h->forced_local |
0e1862bb | 4233 | || bfd_link_executable (info)) |
710ab287 L |
4234 | { |
4235 | /* This symbol is resolved locally. */ | |
56b8aada L |
4236 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
4237 | outrel.r_addend = (h->root.u.def.value | |
4238 | + h->root.u.def.section->output_section->vma | |
4239 | + h->root.u.def.section->output_offset); | |
710ab287 L |
4240 | } |
4241 | else | |
4242 | { | |
351f65ca | 4243 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
4244 | outrel.r_addend = 0; |
4245 | } | |
4246 | ||
6de2ae4a | 4247 | sreloc = htab->elf.irelifunc; |
351f65ca | 4248 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
4249 | |
4250 | /* If this reloc is against an external symbol, we | |
4251 | do not want to fiddle with the addend. Otherwise, | |
4252 | we need to include the symbol value so that it | |
4253 | becomes an addend for the dynamic reloc. For an | |
4254 | internal symbol, we have updated addend. */ | |
56b8aada | 4255 | continue; |
710ab287 | 4256 | } |
17672001 | 4257 | /* FALLTHROUGH */ |
cbe950e9 | 4258 | case R_X86_64_PC32: |
c3320543 | 4259 | case R_X86_64_PC32_BND: |
cbe950e9 L |
4260 | case R_X86_64_PC64: |
4261 | case R_X86_64_PLT32: | |
c3320543 | 4262 | case R_X86_64_PLT32_BND: |
cbe950e9 L |
4263 | goto do_relocation; |
4264 | ||
4265 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
4266 | case R_X86_64_GOTPCRELX: |
4267 | case R_X86_64_REX_GOTPCRELX: | |
cbe950e9 | 4268 | case R_X86_64_GOTPCREL64: |
6de2ae4a | 4269 | base_got = htab->elf.sgot; |
cbe950e9 L |
4270 | off = h->got.offset; |
4271 | ||
7afd84dc | 4272 | if (base_got == NULL) |
cbe950e9 L |
4273 | abort (); |
4274 | ||
7afd84dc | 4275 | if (off == (bfd_vma) -1) |
cbe950e9 | 4276 | { |
7afd84dc L |
4277 | /* We can't use h->got.offset here to save state, or |
4278 | even just remember the offset, as finish_dynamic_symbol | |
4279 | would use that as offset into .got. */ | |
cbe950e9 | 4280 | |
6de2ae4a | 4281 | if (htab->elf.splt != NULL) |
7afd84dc | 4282 | { |
eed180f8 | 4283 | plt_index = h->plt.offset / plt_entry_size - 1; |
7afd84dc | 4284 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 4285 | base_got = htab->elf.sgotplt; |
7afd84dc | 4286 | } |
cbe950e9 L |
4287 | else |
4288 | { | |
eed180f8 | 4289 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 4290 | off = plt_index * GOT_ENTRY_SIZE; |
6de2ae4a | 4291 | base_got = htab->elf.igotplt; |
7afd84dc L |
4292 | } |
4293 | ||
4294 | if (h->dynindx == -1 | |
4295 | || h->forced_local | |
4296 | || info->symbolic) | |
4297 | { | |
eed180f8 | 4298 | /* This references the local defitionion. We must |
7afd84dc | 4299 | initialize this entry in the global offset table. |
eed180f8 | 4300 | Since the offset must always be a multiple of 8, |
7afd84dc L |
4301 | we use the least significant bit to record |
4302 | whether we have initialized it already. | |
4303 | ||
4304 | When doing a dynamic link, we create a .rela.got | |
4305 | relocation entry to initialize the value. This | |
4306 | is done in the finish_dynamic_symbol routine. */ | |
4307 | if ((off & 1) != 0) | |
4308 | off &= ~1; | |
4309 | else | |
4310 | { | |
4311 | bfd_put_64 (output_bfd, relocation, | |
4312 | base_got->contents + off); | |
4313 | /* Note that this is harmless for the GOTPLT64 | |
4314 | case, as -1 | 1 still is -1. */ | |
4315 | h->got.offset |= 1; | |
4316 | } | |
cbe950e9 L |
4317 | } |
4318 | } | |
4319 | ||
4320 | relocation = (base_got->output_section->vma | |
4321 | + base_got->output_offset + off); | |
4322 | ||
cbe950e9 L |
4323 | goto do_relocation; |
4324 | } | |
4325 | } | |
4326 | ||
aec6b87e | 4327 | resolved_to_zero = (eh != NULL |
e62b9723 L |
4328 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
4329 | eh->has_got_reloc, | |
4330 | eh)); | |
aec6b87e | 4331 | |
70256ad8 AJ |
4332 | /* When generating a shared object, the relocations handled here are |
4333 | copied into the output file to be resolved at run time. */ | |
4334 | switch (r_type) | |
4335 | { | |
4336 | case R_X86_64_GOT32: | |
7b81dfbb | 4337 | case R_X86_64_GOT64: |
70256ad8 AJ |
4338 | /* Relocation is to the entry for this symbol in the global |
4339 | offset table. */ | |
70256ad8 | 4340 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
4341 | case R_X86_64_GOTPCRELX: |
4342 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
4343 | case R_X86_64_GOTPCREL64: |
4344 | /* Use global offset table entry as symbol value. */ | |
4345 | case R_X86_64_GOTPLT64: | |
553d1284 | 4346 | /* This is obsolete and treated the the same as GOT64. */ |
6de2ae4a | 4347 | base_got = htab->elf.sgot; |
7b81dfbb | 4348 | |
6de2ae4a | 4349 | if (htab->elf.sgot == NULL) |
c434dee6 | 4350 | abort (); |
053579d7 | 4351 | |
51e0a107 | 4352 | if (h != NULL) |
70256ad8 | 4353 | { |
b34976b6 | 4354 | bfd_boolean dyn; |
c434dee6 AJ |
4355 | |
4356 | off = h->got.offset; | |
7b81dfbb | 4357 | if (h->needs_plt |
eed180f8 | 4358 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
4359 | && off == (bfd_vma)-1) |
4360 | { | |
4361 | /* We can't use h->got.offset here to save | |
4362 | state, or even just remember the offset, as | |
4363 | finish_dynamic_symbol would use that as offset into | |
4364 | .got. */ | |
eed180f8 | 4365 | bfd_vma plt_index = h->plt.offset / plt_entry_size - 1; |
7b81dfbb | 4366 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 4367 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
4368 | } |
4369 | ||
c434dee6 | 4370 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 4371 | |
0e1862bb L |
4372 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
4373 | || (bfd_link_pic (info) | |
27482721 | 4374 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
4375 | || (ELF_ST_VISIBILITY (h->other) |
4376 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
4377 | { |
4378 | /* This is actually a static link, or it is a -Bsymbolic | |
4379 | link and the symbol is defined locally, or the symbol | |
407443a3 | 4380 | was forced to be local because of a version file. We |
51e0a107 JH |
4381 | must initialize this entry in the global offset table. |
4382 | Since the offset must always be a multiple of 8, we | |
4383 | use the least significant bit to record whether we | |
4384 | have initialized it already. | |
4385 | ||
4386 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
4387 | relocation entry to initialize the value. This is |
4388 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
4389 | if ((off & 1) != 0) |
4390 | off &= ~1; | |
4391 | else | |
4392 | { | |
4393 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
4394 | base_got->contents + off); |
4395 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 4396 | as -1 | 1 still is -1. */ |
51e0a107 JH |
4397 | h->got.offset |= 1; |
4398 | } | |
4399 | } | |
053579d7 | 4400 | else |
b34976b6 | 4401 | unresolved_reloc = FALSE; |
70256ad8 | 4402 | } |
51e0a107 JH |
4403 | else |
4404 | { | |
c434dee6 AJ |
4405 | if (local_got_offsets == NULL) |
4406 | abort (); | |
51e0a107 JH |
4407 | |
4408 | off = local_got_offsets[r_symndx]; | |
4409 | ||
4410 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
4411 | the least significant bit to record whether we have |
4412 | already generated the necessary reloc. */ | |
51e0a107 JH |
4413 | if ((off & 1) != 0) |
4414 | off &= ~1; | |
4415 | else | |
4416 | { | |
c434dee6 | 4417 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 4418 | base_got->contents + off); |
51e0a107 | 4419 | |
0e1862bb | 4420 | if (bfd_link_pic (info)) |
51e0a107 | 4421 | { |
947216bf | 4422 | asection *s; |
51e0a107 | 4423 | Elf_Internal_Rela outrel; |
70256ad8 | 4424 | |
51e0a107 JH |
4425 | /* We need to generate a R_X86_64_RELATIVE reloc |
4426 | for the dynamic linker. */ | |
6de2ae4a | 4427 | s = htab->elf.srelgot; |
947216bf | 4428 | if (s == NULL) |
c434dee6 | 4429 | abort (); |
51e0a107 | 4430 | |
7b81dfbb AJ |
4431 | outrel.r_offset = (base_got->output_section->vma |
4432 | + base_got->output_offset | |
51e0a107 | 4433 | + off); |
351f65ca | 4434 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
51e0a107 | 4435 | outrel.r_addend = relocation; |
351f65ca | 4436 | elf_append_rela (output_bfd, s, &outrel); |
51e0a107 JH |
4437 | } |
4438 | ||
4439 | local_got_offsets[r_symndx] |= 1; | |
4440 | } | |
51e0a107 | 4441 | } |
6a2bda3f | 4442 | |
c434dee6 AJ |
4443 | if (off >= (bfd_vma) -2) |
4444 | abort (); | |
4445 | ||
7b81dfbb AJ |
4446 | relocation = base_got->output_section->vma |
4447 | + base_got->output_offset + off; | |
56ceb5b5 L |
4448 | if (r_type != R_X86_64_GOTPCREL |
4449 | && r_type != R_X86_64_GOTPCRELX | |
4450 | && r_type != R_X86_64_REX_GOTPCRELX | |
4451 | && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
4452 | relocation -= htab->elf.sgotplt->output_section->vma |
4453 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 4454 | |
70256ad8 AJ |
4455 | break; |
4456 | ||
d6ab8113 JB |
4457 | case R_X86_64_GOTOFF64: |
4458 | /* Relocation is relative to the start of the global offset | |
4459 | table. */ | |
4460 | ||
3d949995 L |
4461 | /* Check to make sure it isn't a protected function or data |
4462 | symbol for shared library since it may not be local when | |
e3c0e327 L |
4463 | used as function address or with copy relocation. We also |
4464 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 4465 | if (bfd_link_pic (info) && h) |
d6ab8113 | 4466 | { |
e3c0e327 L |
4467 | if (!h->def_regular) |
4468 | { | |
4469 | const char *v; | |
4470 | ||
4471 | switch (ELF_ST_VISIBILITY (h->other)) | |
4472 | { | |
4473 | case STV_HIDDEN: | |
4474 | v = _("hidden symbol"); | |
4475 | break; | |
4476 | case STV_INTERNAL: | |
4477 | v = _("internal symbol"); | |
4478 | break; | |
4479 | case STV_PROTECTED: | |
4480 | v = _("protected symbol"); | |
4481 | break; | |
4482 | default: | |
4483 | v = _("symbol"); | |
4484 | break; | |
4485 | } | |
4486 | ||
4487 | (*_bfd_error_handler) | |
4488 | (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s `%s' can not be used when making a shared object"), | |
4489 | input_bfd, v, h->root.root.string); | |
4490 | bfd_set_error (bfd_error_bad_value); | |
4491 | return FALSE; | |
4492 | } | |
0e1862bb | 4493 | else if (!bfd_link_executable (info) |
e3c0e327 L |
4494 | && !SYMBOL_REFERENCES_LOCAL (info, h) |
4495 | && (h->type == STT_FUNC | |
4496 | || h->type == STT_OBJECT) | |
4497 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
4498 | { | |
4499 | (*_bfd_error_handler) | |
4500 | (_("%B: relocation R_X86_64_GOTOFF64 against protected %s `%s' can not be used when making a shared object"), | |
4501 | input_bfd, | |
4502 | h->type == STT_FUNC ? "function" : "data", | |
4503 | h->root.root.string); | |
4504 | bfd_set_error (bfd_error_bad_value); | |
d6ab8113 | 4505 | return FALSE; |
e3c0e327 | 4506 | } |
d6ab8113 JB |
4507 | } |
4508 | ||
4509 | /* Note that sgot is not involved in this | |
4510 | calculation. We always want the start of .got.plt. If we | |
4511 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
4512 | permitted by the ABI, we might have to change this | |
4513 | calculation. */ | |
6de2ae4a L |
4514 | relocation -= htab->elf.sgotplt->output_section->vma |
4515 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4516 | break; |
4517 | ||
4518 | case R_X86_64_GOTPC32: | |
7b81dfbb | 4519 | case R_X86_64_GOTPC64: |
d6ab8113 | 4520 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
4521 | relocation = htab->elf.sgotplt->output_section->vma |
4522 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4523 | unresolved_reloc = FALSE; |
4524 | break; | |
7b81dfbb AJ |
4525 | |
4526 | case R_X86_64_PLTOFF64: | |
4527 | /* Relocation is PLT entry relative to GOT. For local | |
4528 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 4529 | if (h != NULL |
7b81dfbb AJ |
4530 | /* See PLT32 handling. */ |
4531 | && h->plt.offset != (bfd_vma) -1 | |
6de2ae4a | 4532 | && htab->elf.splt != NULL) |
7b81dfbb | 4533 | { |
0ff2b86e L |
4534 | if (htab->plt_bnd != NULL) |
4535 | { | |
4536 | resolved_plt = htab->plt_bnd; | |
4537 | plt_offset = eh->plt_bnd.offset; | |
4538 | } | |
4539 | else | |
4540 | { | |
4541 | resolved_plt = htab->elf.splt; | |
4542 | plt_offset = h->plt.offset; | |
4543 | } | |
4544 | ||
4545 | relocation = (resolved_plt->output_section->vma | |
4546 | + resolved_plt->output_offset | |
4547 | + plt_offset); | |
7b81dfbb AJ |
4548 | unresolved_reloc = FALSE; |
4549 | } | |
4550 | ||
6de2ae4a L |
4551 | relocation -= htab->elf.sgotplt->output_section->vma |
4552 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 4553 | break; |
d6ab8113 | 4554 | |
70256ad8 | 4555 | case R_X86_64_PLT32: |
c3320543 | 4556 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
4557 | /* Relocation is to the entry for this symbol in the |
4558 | procedure linkage table. */ | |
4559 | ||
4560 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 4561 | without using the procedure linkage table. */ |
70256ad8 AJ |
4562 | if (h == NULL) |
4563 | break; | |
4564 | ||
dd7e64d4 L |
4565 | if ((h->plt.offset == (bfd_vma) -1 |
4566 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 4567 | || htab->elf.splt == NULL) |
70256ad8 AJ |
4568 | { |
4569 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
4570 | happens when statically linking PIC code, or when |
4571 | using -Bsymbolic. */ | |
70256ad8 AJ |
4572 | break; |
4573 | } | |
4574 | ||
dd7e64d4 | 4575 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 4576 | { |
dd7e64d4 L |
4577 | if (htab->plt_bnd != NULL) |
4578 | { | |
4579 | resolved_plt = htab->plt_bnd; | |
4580 | plt_offset = eh->plt_bnd.offset; | |
4581 | } | |
4582 | else | |
4583 | { | |
4584 | resolved_plt = htab->elf.splt; | |
4585 | plt_offset = h->plt.offset; | |
4586 | } | |
0ff2b86e L |
4587 | } |
4588 | else | |
4589 | { | |
dd7e64d4 L |
4590 | /* Use the GOT PLT. */ |
4591 | resolved_plt = htab->plt_got; | |
4592 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
4593 | } |
4594 | ||
4595 | relocation = (resolved_plt->output_section->vma | |
4596 | + resolved_plt->output_offset | |
4597 | + plt_offset); | |
b34976b6 | 4598 | unresolved_reloc = FALSE; |
70256ad8 AJ |
4599 | break; |
4600 | ||
1788fc08 L |
4601 | case R_X86_64_SIZE32: |
4602 | case R_X86_64_SIZE64: | |
1788fc08 L |
4603 | /* Set to symbol size. */ |
4604 | relocation = st_size; | |
4605 | goto direct; | |
4606 | ||
fd8ab9e5 AJ |
4607 | case R_X86_64_PC8: |
4608 | case R_X86_64_PC16: | |
4609 | case R_X86_64_PC32: | |
c3320543 | 4610 | case R_X86_64_PC32_BND: |
6333bc0d | 4611 | /* Don't complain about -fPIC if the symbol is undefined when |
aec6b87e L |
4612 | building executable unless it is unresolved weak symbol. */ |
4613 | if ((input_section->flags & SEC_ALLOC) != 0 | |
90f487df | 4614 | && (input_section->flags & SEC_READONLY) != 0 |
6333bc0d | 4615 | && h != NULL |
aec6b87e L |
4616 | && ((bfd_link_executable (info) |
4617 | && h->root.type == bfd_link_hash_undefweak | |
4618 | && !resolved_to_zero) | |
4619 | || (bfd_link_pic (info) | |
4620 | && !(bfd_link_pie (info) | |
4621 | && h->root.type == bfd_link_hash_undefined)))) | |
6610a52d | 4622 | { |
41bed6dd L |
4623 | bfd_boolean fail = FALSE; |
4624 | bfd_boolean branch | |
c3320543 L |
4625 | = ((r_type == R_X86_64_PC32 |
4626 | || r_type == R_X86_64_PC32_BND) | |
41bed6dd L |
4627 | && is_32bit_relative_branch (contents, rel->r_offset)); |
4628 | ||
4629 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
4630 | { | |
4631 | /* Symbol is referenced locally. Make sure it is | |
4632 | defined locally or for a branch. */ | |
4633 | fail = !h->def_regular && !branch; | |
4634 | } | |
aec6b87e | 4635 | else if (!(bfd_link_pie (info) |
bc696fd5 | 4636 | && (h->needs_copy || eh->needs_copy))) |
41bed6dd | 4637 | { |
9a926d55 L |
4638 | /* Symbol doesn't need copy reloc and isn't referenced |
4639 | locally. We only allow branch to symbol with | |
4640 | non-default visibility. */ | |
41bed6dd L |
4641 | fail = (!branch |
4642 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
4643 | } | |
4644 | ||
4645 | if (fail) | |
338c190a L |
4646 | return elf_x86_64_need_pic (input_bfd, input_section, |
4647 | h, NULL, NULL, howto); | |
6610a52d L |
4648 | } |
4649 | /* Fall through. */ | |
4650 | ||
70256ad8 AJ |
4651 | case R_X86_64_8: |
4652 | case R_X86_64_16: | |
4653 | case R_X86_64_32: | |
d6ab8113 | 4654 | case R_X86_64_PC64: |
6b3db546 | 4655 | case R_X86_64_64: |
80643fbc | 4656 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 4657 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 4658 | |
1788fc08 | 4659 | direct: |
b1e24c02 | 4660 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
4661 | break; |
4662 | ||
9a926d55 | 4663 | /* Don't copy a pc-relative relocation into the output file |
6333bc0d | 4664 | if the symbol needs copy reloc or the symbol is undefined |
04ebc307 | 4665 | when building executable. Copy dynamic function pointer |
aec6b87e L |
4666 | relocations. Don't generate dynamic relocations against |
4667 | resolved undefined weak symbols in PIE. */ | |
0e1862bb | 4668 | if ((bfd_link_pic (info) |
aec6b87e | 4669 | && !(bfd_link_pie (info) |
fd9edc90 | 4670 | && h != NULL |
6333bc0d L |
4671 | && (h->needs_copy |
4672 | || eh->needs_copy | |
4673 | || h->root.type == bfd_link_hash_undefined) | |
9a926d55 | 4674 | && IS_X86_64_PCREL_TYPE (r_type)) |
4bc6e03a | 4675 | && (h == NULL |
aec6b87e L |
4676 | || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
4677 | && !resolved_to_zero) | |
4678 | || h->root.type != bfd_link_hash_undefweak)) | |
1788fc08 L |
4679 | && ((! IS_X86_64_PCREL_TYPE (r_type) |
4680 | && r_type != R_X86_64_SIZE32 | |
4681 | && r_type != R_X86_64_SIZE64) | |
d8045f23 | 4682 | || ! SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c | 4683 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 4684 | && !bfd_link_pic (info) |
c434dee6 AJ |
4685 | && h != NULL |
4686 | && h->dynindx != -1 | |
aec6b87e L |
4687 | && (!h->non_got_ref |
4688 | || eh->func_pointer_refcount > 0 | |
4689 | || (h->root.type == bfd_link_hash_undefweak | |
4690 | && !resolved_to_zero)) | |
bae420ef L |
4691 | && ((h->def_dynamic && !h->def_regular) |
4692 | /* Undefined weak symbol is bound locally when | |
4693 | PIC is false. */ | |
0f88be7a | 4694 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
4695 | { |
4696 | Elf_Internal_Rela outrel; | |
b34976b6 | 4697 | bfd_boolean skip, relocate; |
c434dee6 | 4698 | asection *sreloc; |
70256ad8 AJ |
4699 | |
4700 | /* When generating a shared object, these relocations | |
4701 | are copied into the output file to be resolved at run | |
407443a3 | 4702 | time. */ |
b34976b6 AM |
4703 | skip = FALSE; |
4704 | relocate = FALSE; | |
70256ad8 | 4705 | |
c629eae0 JJ |
4706 | outrel.r_offset = |
4707 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 4708 | rel->r_offset); |
c629eae0 | 4709 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 4710 | skip = TRUE; |
0fb19cbc | 4711 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 4712 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
4713 | |
4714 | outrel.r_offset += (input_section->output_section->vma | |
4715 | + input_section->output_offset); | |
4716 | ||
4717 | if (skip) | |
0bb2d96a | 4718 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 4719 | |
fd8ab9e5 AJ |
4720 | /* h->dynindx may be -1 if this symbol was marked to |
4721 | become local. */ | |
4722 | else if (h != NULL | |
c434dee6 | 4723 | && h->dynindx != -1 |
d8045f23 | 4724 | && (IS_X86_64_PCREL_TYPE (r_type) |
4e0c91e4 L |
4725 | || !(bfd_link_executable (info) |
4726 | || SYMBOLIC_BIND (info, h)) | |
d8045f23 | 4727 | || ! h->def_regular)) |
70256ad8 | 4728 | { |
351f65ca | 4729 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 4730 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
4731 | } |
4732 | else | |
4733 | { | |
4c10bbaa L |
4734 | /* This symbol is local, or marked to become local. |
4735 | When relocation overflow check is disabled, we | |
4736 | convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
4737 | if (r_type == htab->pointer_r_type | |
4738 | || (r_type == R_X86_64_32 | |
4739 | && info->no_reloc_overflow_check)) | |
607c0e09 | 4740 | { |
b34976b6 | 4741 | relocate = TRUE; |
351f65ca | 4742 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
4743 | outrel.r_addend = relocation + rel->r_addend; |
4744 | } | |
64d25c44 L |
4745 | else if (r_type == R_X86_64_64 |
4746 | && !ABI_64_P (output_bfd)) | |
4747 | { | |
4748 | relocate = TRUE; | |
4749 | outrel.r_info = htab->r_info (0, | |
4750 | R_X86_64_RELATIVE64); | |
4751 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
4752 | /* Check addend overflow. */ |
4753 | if ((outrel.r_addend & 0x80000000) | |
4754 | != (rel->r_addend & 0x80000000)) | |
4755 | { | |
4756 | const char *name; | |
268a8d3a | 4757 | int addend = rel->r_addend; |
8cf0d2dd L |
4758 | if (h && h->root.root.string) |
4759 | name = h->root.root.string; | |
4760 | else | |
4761 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
4762 | sym, NULL); | |
6f2c9068 L |
4763 | if (addend < 0) |
4764 | (*_bfd_error_handler) | |
268a8d3a | 4765 | (_("%B: addend -0x%x in relocation %s against " |
6f2c9068 L |
4766 | "symbol `%s' at 0x%lx in section `%A' is " |
4767 | "out of range"), | |
4768 | input_bfd, input_section, addend, | |
ef77d6af L |
4769 | howto->name, name, |
4770 | (unsigned long) rel->r_offset); | |
6f2c9068 L |
4771 | else |
4772 | (*_bfd_error_handler) | |
268a8d3a | 4773 | (_("%B: addend 0x%x in relocation %s against " |
6f2c9068 L |
4774 | "symbol `%s' at 0x%lx in section `%A' is " |
4775 | "out of range"), | |
4776 | input_bfd, input_section, addend, | |
ef77d6af L |
4777 | howto->name, name, |
4778 | (unsigned long) rel->r_offset); | |
8cf0d2dd L |
4779 | bfd_set_error (bfd_error_bad_value); |
4780 | return FALSE; | |
4781 | } | |
64d25c44 | 4782 | } |
607c0e09 AS |
4783 | else |
4784 | { | |
4785 | long sindx; | |
4786 | ||
8517fae7 | 4787 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
4788 | sindx = 0; |
4789 | else if (sec == NULL || sec->owner == NULL) | |
4790 | { | |
4791 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 4792 | return FALSE; |
607c0e09 AS |
4793 | } |
4794 | else | |
4795 | { | |
4796 | asection *osec; | |
4797 | ||
74541ad4 AM |
4798 | /* We are turning this relocation into one |
4799 | against a section symbol. It would be | |
4800 | proper to subtract the symbol's value, | |
4801 | osec->vma, from the emitted reloc addend, | |
4802 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
4803 | osec = sec->output_section; |
4804 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
4805 | if (sindx == 0) |
4806 | { | |
4807 | asection *oi = htab->elf.text_index_section; | |
4808 | sindx = elf_section_data (oi)->dynindx; | |
4809 | } | |
4810 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
4811 | } |
4812 | ||
351f65ca | 4813 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
4814 | outrel.r_addend = relocation + rel->r_addend; |
4815 | } | |
70256ad8 AJ |
4816 | } |
4817 | ||
cbe950e9 | 4818 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 4819 | |
62d78908 L |
4820 | if (sreloc == NULL || sreloc->contents == NULL) |
4821 | { | |
4822 | r = bfd_reloc_notsupported; | |
4823 | goto check_relocation_error; | |
4824 | } | |
c434dee6 | 4825 | |
351f65ca | 4826 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
4827 | |
4828 | /* If this reloc is against an external symbol, we do | |
4829 | not want to fiddle with the addend. Otherwise, we | |
4830 | need to include the symbol value so that it becomes | |
4831 | an addend for the dynamic reloc. */ | |
0f88be7a | 4832 | if (! relocate) |
70256ad8 AJ |
4833 | continue; |
4834 | } | |
4835 | ||
4836 | break; | |
4837 | ||
bffbf940 | 4838 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
4839 | case R_X86_64_GOTPC32_TLSDESC: |
4840 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 4841 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
4842 | tls_type = GOT_UNKNOWN; |
4843 | if (h == NULL && local_got_offsets) | |
351f65ca | 4844 | tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 4845 | else if (h != NULL) |
351f65ca | 4846 | tls_type = elf_x86_64_hash_entry (h)->tls_type; |
142411ca | 4847 | |
351f65ca L |
4848 | if (! elf_x86_64_tls_transition (info, input_bfd, |
4849 | input_section, contents, | |
4850 | symtab_hdr, sym_hashes, | |
4851 | &r_type, tls_type, rel, | |
bedfd056 | 4852 | relend, h, r_symndx, TRUE)) |
534a31f6 | 4853 | return FALSE; |
bffbf940 JJ |
4854 | |
4855 | if (r_type == R_X86_64_TPOFF32) | |
4856 | { | |
142411ca L |
4857 | bfd_vma roff = rel->r_offset; |
4858 | ||
bffbf940 | 4859 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 4860 | |
351f65ca | 4861 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 4862 | { |
52bc799a | 4863 | /* GD->LE transition. For 64bit, change |
abcf1d52 | 4864 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
a3fadc9a | 4865 | .word 0x6666; rex64; call __tls_get_addr |
52bc799a | 4866 | into: |
bffbf940 | 4867 | movq %fs:0, %rax |
52bc799a L |
4868 | leaq foo@tpoff(%rax), %rax |
4869 | For 32bit, change | |
4870 | leaq foo@tlsgd(%rip), %rdi | |
4871 | .word 0x6666; rex64; call __tls_get_addr | |
4872 | into: | |
4873 | movl %fs:0, %eax | |
5c98a14e JJ |
4874 | leaq foo@tpoff(%rax), %rax |
4875 | For largepic, change: | |
4876 | leaq foo@tlsgd(%rip), %rdi | |
4877 | movabsq $__tls_get_addr@pltoff, %rax | |
4878 | addq %rbx, %rax | |
4879 | call *%rax | |
4880 | into: | |
4881 | movq %fs:0, %rax | |
4882 | leaq foo@tpoff(%rax), %rax | |
4883 | nopw 0x0(%rax,%rax,1) */ | |
4884 | int largepic = 0; | |
4885 | if (ABI_64_P (output_bfd) | |
4886 | && contents[roff + 5] == (bfd_byte) '\xb8') | |
4887 | { | |
4888 | memcpy (contents + roff - 3, | |
4889 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
4890 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
4891 | largepic = 1; | |
4892 | } | |
4893 | else if (ABI_64_P (output_bfd)) | |
52bc799a L |
4894 | memcpy (contents + roff - 4, |
4895 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
4896 | 16); | |
4897 | else | |
4898 | memcpy (contents + roff - 3, | |
4899 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
4900 | 15); | |
eb4ff4d6 | 4901 | bfd_put_32 (output_bfd, |
351f65ca | 4902 | elf_x86_64_tpoff (info, relocation), |
5c98a14e JJ |
4903 | contents + roff + 8 + largepic); |
4904 | /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
bffbf940 | 4905 | rel++; |
60f2e42e | 4906 | wrel++; |
bffbf940 JJ |
4907 | continue; |
4908 | } | |
351f65ca | 4909 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
4910 | { |
4911 | /* GDesc -> LE transition. | |
4912 | It's originally something like: | |
4913 | leaq x@tlsdesc(%rip), %rax | |
4914 | ||
4915 | Change it to: | |
c9736ba0 | 4916 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 4917 | |
c9736ba0 | 4918 | unsigned int val, type; |
67a4f2b7 | 4919 | |
67a4f2b7 | 4920 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 4921 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
4922 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
4923 | contents + roff - 3); | |
4924 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
4925 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4926 | contents + roff - 1); | |
eb4ff4d6 | 4927 | bfd_put_32 (output_bfd, |
351f65ca | 4928 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
4929 | contents + roff); |
4930 | continue; | |
4931 | } | |
351f65ca | 4932 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
4933 | { |
4934 | /* GDesc -> LE transition. | |
4935 | It's originally: | |
4936 | call *(%rax) | |
4937 | Turn it into: | |
142411ca | 4938 | xchg %ax,%ax. */ |
10efb593 | 4939 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
4940 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4941 | continue; | |
4942 | } | |
351f65ca | 4943 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 4944 | { |
bffbf940 | 4945 | /* IE->LE transition: |
cf61b747 | 4946 | For 64bit, originally it can be one of: |
bffbf940 JJ |
4947 | movq foo@gottpoff(%rip), %reg |
4948 | addq foo@gottpoff(%rip), %reg | |
4949 | We change it into: | |
4950 | movq $foo, %reg | |
4951 | leaq foo(%reg), %reg | |
cf61b747 L |
4952 | addq $foo, %reg. |
4953 | For 32bit, originally it can be one of: | |
4954 | movq foo@gottpoff(%rip), %reg | |
4955 | addl foo@gottpoff(%rip), %reg | |
4956 | We change it into: | |
4957 | movq $foo, %reg | |
4958 | leal foo(%reg), %reg | |
4959 | addl $foo, %reg. */ | |
142411ca L |
4960 | |
4961 | unsigned int val, type, reg; | |
4962 | ||
cf61b747 L |
4963 | if (roff >= 3) |
4964 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
4965 | else | |
4966 | val = 0; | |
142411ca L |
4967 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
4968 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 4969 | reg >>= 3; |
bffbf940 JJ |
4970 | if (type == 0x8b) |
4971 | { | |
4972 | /* movq */ | |
4973 | if (val == 0x4c) | |
4974 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 4975 | contents + roff - 3); |
4a4c5f25 L |
4976 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4977 | bfd_put_8 (output_bfd, 0x41, | |
4978 | contents + roff - 3); | |
bffbf940 | 4979 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 4980 | contents + roff - 2); |
bffbf940 | 4981 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 4982 | contents + roff - 1); |
bffbf940 JJ |
4983 | } |
4984 | else if (reg == 4) | |
4985 | { | |
cf61b747 L |
4986 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
4987 | is special */ | |
bffbf940 JJ |
4988 | if (val == 0x4c) |
4989 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 4990 | contents + roff - 3); |
4a4c5f25 L |
4991 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4992 | bfd_put_8 (output_bfd, 0x41, | |
4993 | contents + roff - 3); | |
bffbf940 | 4994 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 4995 | contents + roff - 2); |
bffbf940 | 4996 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 4997 | contents + roff - 1); |
bffbf940 JJ |
4998 | } |
4999 | else | |
5000 | { | |
cf61b747 | 5001 | /* addq/addl -> leaq/leal */ |
bffbf940 JJ |
5002 | if (val == 0x4c) |
5003 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 5004 | contents + roff - 3); |
4a4c5f25 L |
5005 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5006 | bfd_put_8 (output_bfd, 0x45, | |
5007 | contents + roff - 3); | |
bffbf940 | 5008 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 5009 | contents + roff - 2); |
bffbf940 | 5010 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 5011 | contents + roff - 1); |
bffbf940 | 5012 | } |
eb4ff4d6 | 5013 | bfd_put_32 (output_bfd, |
351f65ca | 5014 | elf_x86_64_tpoff (info, relocation), |
142411ca | 5015 | contents + roff); |
bffbf940 JJ |
5016 | continue; |
5017 | } | |
142411ca L |
5018 | else |
5019 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
5020 | } |
5021 | ||
6de2ae4a | 5022 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
5023 | abort (); |
5024 | ||
5025 | if (h != NULL) | |
67a4f2b7 AO |
5026 | { |
5027 | off = h->got.offset; | |
351f65ca | 5028 | offplt = elf_x86_64_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 5029 | } |
bffbf940 JJ |
5030 | else |
5031 | { | |
5032 | if (local_got_offsets == NULL) | |
5033 | abort (); | |
5034 | ||
5035 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 5036 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
5037 | } |
5038 | ||
5039 | if ((off & 1) != 0) | |
5040 | off &= ~1; | |
26e41594 | 5041 | else |
bffbf940 JJ |
5042 | { |
5043 | Elf_Internal_Rela outrel; | |
bffbf940 | 5044 | int dr_type, indx; |
67a4f2b7 | 5045 | asection *sreloc; |
bffbf940 | 5046 | |
6de2ae4a | 5047 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
5048 | abort (); |
5049 | ||
67a4f2b7 AO |
5050 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
5051 | ||
5052 | if (GOT_TLS_GDESC_P (tls_type)) | |
5053 | { | |
351f65ca | 5054 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 5055 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
5056 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
5057 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
5058 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
5059 | + offplt |
5060 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 5061 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 5062 | if (indx == 0) |
351f65ca | 5063 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
67a4f2b7 AO |
5064 | else |
5065 | outrel.r_addend = 0; | |
351f65ca | 5066 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
5067 | } |
5068 | ||
6de2ae4a | 5069 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 5070 | |
6de2ae4a L |
5071 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5072 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 5073 | |
67a4f2b7 | 5074 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 5075 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
5076 | else if (GOT_TLS_GDESC_P (tls_type)) |
5077 | goto dr_done; | |
bffbf940 JJ |
5078 | else |
5079 | dr_type = R_X86_64_TPOFF64; | |
5080 | ||
6de2ae4a | 5081 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 5082 | outrel.r_addend = 0; |
67a4f2b7 AO |
5083 | if ((dr_type == R_X86_64_TPOFF64 |
5084 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
351f65ca L |
5085 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
5086 | outrel.r_info = htab->r_info (indx, dr_type); | |
bffbf940 | 5087 | |
351f65ca | 5088 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 5089 | |
67a4f2b7 | 5090 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
5091 | { |
5092 | if (indx == 0) | |
5093 | { | |
d40d037c | 5094 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 5095 | bfd_put_64 (output_bfd, |
351f65ca | 5096 | relocation - elf_x86_64_dtpoff_base (info), |
6de2ae4a | 5097 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
5098 | } |
5099 | else | |
5100 | { | |
5101 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5102 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5103 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
5104 | R_X86_64_DTPOFF64); |
5105 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 5106 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 5107 | &outrel); |
bffbf940 JJ |
5108 | } |
5109 | } | |
5110 | ||
67a4f2b7 | 5111 | dr_done: |
bffbf940 JJ |
5112 | if (h != NULL) |
5113 | h->got.offset |= 1; | |
5114 | else | |
5115 | local_got_offsets[r_symndx] |= 1; | |
5116 | } | |
5117 | ||
67a4f2b7 AO |
5118 | if (off >= (bfd_vma) -2 |
5119 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 5120 | abort (); |
351f65ca | 5121 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 5122 | { |
67a4f2b7 AO |
5123 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
5124 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
5125 | relocation = htab->elf.sgotplt->output_section->vma |
5126 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
5127 | + offplt + htab->sgotplt_jump_table_size; |
5128 | else | |
6de2ae4a L |
5129 | relocation = htab->elf.sgot->output_section->vma |
5130 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5131 | unresolved_reloc = FALSE; |
bffbf940 | 5132 | } |
142411ca | 5133 | else |
67a4f2b7 | 5134 | { |
142411ca | 5135 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 5136 | |
351f65ca | 5137 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 5138 | { |
52bc799a | 5139 | /* GD->IE transition. For 64bit, change |
142411ca L |
5140 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
5141 | .word 0x6666; rex64; call __tls_get_addr@plt | |
52bc799a | 5142 | into: |
142411ca | 5143 | movq %fs:0, %rax |
52bc799a L |
5144 | addq foo@gottpoff(%rip), %rax |
5145 | For 32bit, change | |
5146 | leaq foo@tlsgd(%rip), %rdi | |
5147 | .word 0x6666; rex64; call __tls_get_addr@plt | |
5148 | into: | |
5149 | movl %fs:0, %eax | |
5c98a14e JJ |
5150 | addq foo@gottpoff(%rip), %rax |
5151 | For largepic, change: | |
5152 | leaq foo@tlsgd(%rip), %rdi | |
5153 | movabsq $__tls_get_addr@pltoff, %rax | |
5154 | addq %rbx, %rax | |
5155 | call *%rax | |
5156 | into: | |
5157 | movq %fs:0, %rax | |
5158 | addq foo@gottpoff(%rax), %rax | |
5159 | nopw 0x0(%rax,%rax,1) */ | |
5160 | int largepic = 0; | |
5161 | if (ABI_64_P (output_bfd) | |
5162 | && contents[roff + 5] == (bfd_byte) '\xb8') | |
5163 | { | |
5164 | memcpy (contents + roff - 3, | |
5165 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
5166 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
5167 | largepic = 1; | |
5168 | } | |
5169 | else if (ABI_64_P (output_bfd)) | |
52bc799a L |
5170 | memcpy (contents + roff - 4, |
5171 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
5172 | 16); | |
5173 | else | |
5174 | memcpy (contents + roff - 3, | |
5175 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
5176 | 15); | |
142411ca | 5177 | |
6de2ae4a L |
5178 | relocation = (htab->elf.sgot->output_section->vma |
5179 | + htab->elf.sgot->output_offset + off | |
142411ca | 5180 | - roff |
5c98a14e | 5181 | - largepic |
142411ca L |
5182 | - input_section->output_section->vma |
5183 | - input_section->output_offset | |
5184 | - 12); | |
5185 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
5186 | contents + roff + 8 + largepic); |
5187 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 5188 | rel++; |
60f2e42e | 5189 | wrel++; |
142411ca L |
5190 | continue; |
5191 | } | |
351f65ca | 5192 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
5193 | { |
5194 | /* GDesc -> IE transition. | |
5195 | It's originally something like: | |
5196 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 5197 | |
142411ca | 5198 | Change it to: |
c9736ba0 | 5199 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 5200 | |
142411ca L |
5201 | /* Now modify the instruction as appropriate. To |
5202 | turn a leaq into a movq in the form we use it, it | |
5203 | suffices to change the second byte from 0x8d to | |
5204 | 0x8b. */ | |
5205 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
5206 | ||
5207 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
5208 | htab->elf.sgot->output_section->vma |
5209 | + htab->elf.sgot->output_offset + off | |
142411ca L |
5210 | - rel->r_offset |
5211 | - input_section->output_section->vma | |
5212 | - input_section->output_offset | |
5213 | - 4, | |
5214 | contents + roff); | |
5215 | continue; | |
5216 | } | |
351f65ca | 5217 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
5218 | { |
5219 | /* GDesc -> IE transition. | |
5220 | It's originally: | |
5221 | call *(%rax) | |
5222 | ||
5223 | Change it to: | |
c9736ba0 | 5224 | xchg %ax, %ax. */ |
142411ca | 5225 | |
142411ca L |
5226 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
5227 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
5228 | continue; | |
5229 | } | |
5230 | else | |
5231 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 5232 | } |
bffbf940 JJ |
5233 | break; |
5234 | ||
5235 | case R_X86_64_TLSLD: | |
351f65ca L |
5236 | if (! elf_x86_64_tls_transition (info, input_bfd, |
5237 | input_section, contents, | |
5238 | symtab_hdr, sym_hashes, | |
bedfd056 L |
5239 | &r_type, GOT_UNKNOWN, rel, |
5240 | relend, h, r_symndx, TRUE)) | |
142411ca | 5241 | return FALSE; |
a3fadc9a | 5242 | |
142411ca L |
5243 | if (r_type != R_X86_64_TLSLD) |
5244 | { | |
bffbf940 | 5245 | /* LD->LE transition: |
a3fadc9a | 5246 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr. |
52bc799a L |
5247 | For 64bit, we change it into: |
5248 | .word 0x6666; .byte 0x66; movq %fs:0, %rax. | |
5249 | For 32bit, we change it into: | |
5c98a14e JJ |
5250 | nopl 0x0(%rax); movl %fs:0, %eax. |
5251 | For largepic, change: | |
5252 | leaq foo@tlsgd(%rip), %rdi | |
5253 | movabsq $__tls_get_addr@pltoff, %rax | |
5254 | addq %rbx, %rax | |
5255 | call *%rax | |
5256 | into: | |
3ddf1bdd | 5257 | data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) |
5c98a14e | 5258 | movq %fs:0, %eax */ |
142411ca L |
5259 | |
5260 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
5c98a14e JJ |
5261 | if (ABI_64_P (output_bfd) |
5262 | && contents[rel->r_offset + 5] == (bfd_byte) '\xb8') | |
5263 | memcpy (contents + rel->r_offset - 3, | |
5264 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
5265 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
5266 | else if (ABI_64_P (output_bfd)) | |
52bc799a L |
5267 | memcpy (contents + rel->r_offset - 3, |
5268 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
5269 | else | |
5270 | memcpy (contents + rel->r_offset - 3, | |
5271 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
5c98a14e | 5272 | /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */ |
bffbf940 | 5273 | rel++; |
60f2e42e | 5274 | wrel++; |
bffbf940 JJ |
5275 | continue; |
5276 | } | |
5277 | ||
6de2ae4a | 5278 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
5279 | abort (); |
5280 | ||
5281 | off = htab->tls_ld_got.offset; | |
5282 | if (off & 1) | |
5283 | off &= ~1; | |
5284 | else | |
5285 | { | |
5286 | Elf_Internal_Rela outrel; | |
bffbf940 | 5287 | |
6de2ae4a | 5288 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
5289 | abort (); |
5290 | ||
6de2ae4a L |
5291 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5292 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
5293 | |
5294 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5295 | htab->elf.sgot->contents + off); |
bffbf940 | 5296 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 5297 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5298 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 5299 | outrel.r_addend = 0; |
351f65ca | 5300 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 5301 | &outrel); |
bffbf940 JJ |
5302 | htab->tls_ld_got.offset |= 1; |
5303 | } | |
6de2ae4a L |
5304 | relocation = htab->elf.sgot->output_section->vma |
5305 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5306 | unresolved_reloc = FALSE; |
bffbf940 JJ |
5307 | break; |
5308 | ||
5309 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
5310 | if (!bfd_link_executable (info) |
5311 | || (input_section->flags & SEC_CODE) == 0) | |
351f65ca | 5312 | relocation -= elf_x86_64_dtpoff_base (info); |
bffbf940 | 5313 | else |
351f65ca | 5314 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5315 | break; |
5316 | ||
5317 | case R_X86_64_TPOFF32: | |
6769d501 | 5318 | case R_X86_64_TPOFF64: |
0e1862bb | 5319 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 5320 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5321 | break; |
5322 | ||
a69ed7f7 L |
5323 | case R_X86_64_DTPOFF64: |
5324 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
5325 | relocation -= elf_x86_64_dtpoff_base (info); | |
5326 | break; | |
5327 | ||
70256ad8 AJ |
5328 | default: |
5329 | break; | |
5330 | } | |
8d88c4ca | 5331 | |
239e1f3a AM |
5332 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
5333 | because such sections are not SEC_ALLOC and thus ld.so will | |
5334 | not process them. */ | |
c434dee6 | 5335 | if (unresolved_reloc |
239e1f3a | 5336 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
5337 | && h->def_dynamic) |
5338 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
5339 | rel->r_offset) != (bfd_vma) -1) | |
a040981f L |
5340 | { |
5341 | (*_bfd_error_handler) | |
5342 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), | |
5343 | input_bfd, | |
5344 | input_section, | |
5345 | (long) rel->r_offset, | |
5346 | howto->name, | |
5347 | h->root.root.string); | |
5348 | return FALSE; | |
5349 | } | |
c434dee6 | 5350 | |
cbe950e9 | 5351 | do_relocation: |
8d88c4ca | 5352 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
5353 | contents, rel->r_offset, |
5354 | relocation, rel->r_addend); | |
8d88c4ca | 5355 | |
62d78908 | 5356 | check_relocation_error: |
8d88c4ca | 5357 | if (r != bfd_reloc_ok) |
8da6118f | 5358 | { |
c434dee6 AJ |
5359 | const char *name; |
5360 | ||
5361 | if (h != NULL) | |
5362 | name = h->root.root.string; | |
5363 | else | |
8da6118f | 5364 | { |
c434dee6 AJ |
5365 | name = bfd_elf_string_from_elf_section (input_bfd, |
5366 | symtab_hdr->sh_link, | |
5367 | sym->st_name); | |
5368 | if (name == NULL) | |
b34976b6 | 5369 | return FALSE; |
c434dee6 AJ |
5370 | if (*name == '\0') |
5371 | name = bfd_section_name (input_bfd, sec); | |
5372 | } | |
5373 | ||
5374 | if (r == bfd_reloc_overflow) | |
1a72702b AM |
5375 | (*info->callbacks->reloc_overflow) |
5376 | (info, (h ? &h->root : NULL), name, howto->name, | |
5377 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
c434dee6 AJ |
5378 | else |
5379 | { | |
5380 | (*_bfd_error_handler) | |
bb95161d | 5381 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
d003868e | 5382 | input_bfd, input_section, |
c434dee6 | 5383 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 5384 | return FALSE; |
8da6118f KH |
5385 | } |
5386 | } | |
60f2e42e L |
5387 | |
5388 | if (wrel != rel) | |
5389 | *wrel = *rel; | |
5390 | } | |
5391 | ||
5392 | if (wrel != rel) | |
5393 | { | |
5394 | Elf_Internal_Shdr *rel_hdr; | |
5395 | size_t deleted = rel - wrel; | |
5396 | ||
5397 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
5398 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5399 | if (rel_hdr->sh_size == 0) | |
5400 | { | |
5401 | /* It is too late to remove an empty reloc section. Leave | |
5402 | one NONE reloc. | |
5403 | ??? What is wrong with an empty section??? */ | |
5404 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
5405 | deleted -= 1; | |
5406 | } | |
5407 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
5408 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5409 | input_section->reloc_count -= deleted; | |
8d88c4ca | 5410 | } |
70256ad8 | 5411 | |
b34976b6 | 5412 | return TRUE; |
70256ad8 AJ |
5413 | } |
5414 | ||
5415 | /* Finish up dynamic symbol handling. We set the contents of various | |
5416 | dynamic sections here. */ | |
5417 | ||
b34976b6 | 5418 | static bfd_boolean |
351f65ca L |
5419 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
5420 | struct bfd_link_info *info, | |
5421 | struct elf_link_hash_entry *h, | |
aec6b87e | 5422 | Elf_Internal_Sym *sym) |
70256ad8 | 5423 | { |
351f65ca | 5424 | struct elf_x86_64_link_hash_table *htab; |
0ff2b86e L |
5425 | const struct elf_x86_64_backend_data *abed; |
5426 | bfd_boolean use_plt_bnd; | |
dd7e64d4 | 5427 | struct elf_x86_64_link_hash_entry *eh; |
aec6b87e | 5428 | bfd_boolean local_undefweak; |
70256ad8 | 5429 | |
351f65ca | 5430 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
5431 | if (htab == NULL) |
5432 | return FALSE; | |
70256ad8 | 5433 | |
0ff2b86e L |
5434 | /* Use MPX backend data in case of BND relocation. Use .plt_bnd |
5435 | section only if there is .plt section. */ | |
5436 | use_plt_bnd = htab->elf.splt != NULL && htab->plt_bnd != NULL; | |
5437 | abed = (use_plt_bnd | |
5438 | ? &elf_x86_64_bnd_arch_bed | |
5439 | : get_elf_x86_64_backend_data (output_bfd)); | |
5440 | ||
dd7e64d4 L |
5441 | eh = (struct elf_x86_64_link_hash_entry *) h; |
5442 | ||
aec6b87e L |
5443 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
5444 | resolved undefined weak symbols in executable so that their | |
5445 | references have value 0 at run-time. */ | |
e62b9723 L |
5446 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
5447 | eh->has_got_reloc, | |
5448 | eh); | |
aec6b87e | 5449 | |
70256ad8 AJ |
5450 | if (h->plt.offset != (bfd_vma) -1) |
5451 | { | |
70256ad8 | 5452 | bfd_vma plt_index; |
0ff2b86e L |
5453 | bfd_vma got_offset, plt_offset, plt_plt_offset, plt_got_offset; |
5454 | bfd_vma plt_plt_insn_end, plt_got_insn_size; | |
70256ad8 | 5455 | Elf_Internal_Rela rela; |
947216bf | 5456 | bfd_byte *loc; |
0ff2b86e | 5457 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 5458 | const struct elf_backend_data *bed; |
5974eba6 | 5459 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
5460 | |
5461 | /* When building a static executable, use .iplt, .igot.plt and | |
5462 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 5463 | if (htab->elf.splt != NULL) |
cbe950e9 | 5464 | { |
6de2ae4a L |
5465 | plt = htab->elf.splt; |
5466 | gotplt = htab->elf.sgotplt; | |
5467 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
5468 | } |
5469 | else | |
5470 | { | |
6de2ae4a L |
5471 | plt = htab->elf.iplt; |
5472 | gotplt = htab->elf.igotplt; | |
5473 | relplt = htab->elf.irelplt; | |
cbe950e9 | 5474 | } |
70256ad8 AJ |
5475 | |
5476 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 5477 | it up. */ |
cbe950e9 | 5478 | if ((h->dynindx == -1 |
aec6b87e | 5479 | && !local_undefweak |
0e1862bb | 5480 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
5481 | && h->def_regular |
5482 | && h->type == STT_GNU_IFUNC)) | |
5483 | || plt == NULL | |
5484 | || gotplt == NULL | |
5485 | || relplt == NULL) | |
cec7f46a | 5486 | abort (); |
70256ad8 AJ |
5487 | |
5488 | /* Get the index in the procedure linkage table which | |
5489 | corresponds to this symbol. This is the index of this symbol | |
5490 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 5491 | first entry in the procedure linkage table is reserved. |
6bbec505 | 5492 | |
cbe950e9 | 5493 | Get the offset into the .got table of the entry that |
407443a3 | 5494 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
5495 | bytes. The first three are reserved for the dynamic linker. |
5496 | ||
5497 | For static executables, we don't reserve anything. */ | |
5498 | ||
6de2ae4a | 5499 | if (plt == htab->elf.splt) |
cbe950e9 | 5500 | { |
eed180f8 | 5501 | got_offset = h->plt.offset / abed->plt_entry_size - 1; |
e1f98742 | 5502 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
5503 | } |
5504 | else | |
5505 | { | |
eed180f8 | 5506 | got_offset = h->plt.offset / abed->plt_entry_size; |
e1f98742 | 5507 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 5508 | } |
70256ad8 | 5509 | |
0ff2b86e L |
5510 | plt_plt_insn_end = abed->plt_plt_insn_end; |
5511 | plt_plt_offset = abed->plt_plt_offset; | |
5512 | plt_got_insn_size = abed->plt_got_insn_size; | |
5513 | plt_got_offset = abed->plt_got_offset; | |
5514 | if (use_plt_bnd) | |
5515 | { | |
5516 | /* Use the second PLT with BND relocations. */ | |
5517 | const bfd_byte *plt_entry, *plt2_entry; | |
0ff2b86e L |
5518 | |
5519 | if (eh->has_bnd_reloc) | |
5520 | { | |
5521 | plt_entry = elf_x86_64_bnd_plt_entry; | |
5522 | plt2_entry = elf_x86_64_bnd_plt2_entry; | |
5523 | } | |
5524 | else | |
5525 | { | |
5526 | plt_entry = elf_x86_64_legacy_plt_entry; | |
5527 | plt2_entry = elf_x86_64_legacy_plt2_entry; | |
5528 | ||
5529 | /* Subtract 1 since there is no BND prefix. */ | |
5530 | plt_plt_insn_end -= 1; | |
5531 | plt_plt_offset -= 1; | |
5532 | plt_got_insn_size -= 1; | |
5533 | plt_got_offset -= 1; | |
5534 | } | |
5535 | ||
5536 | BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry) | |
5537 | == sizeof (elf_x86_64_legacy_plt_entry)); | |
5538 | ||
5539 | /* Fill in the entry in the procedure linkage table. */ | |
5540 | memcpy (plt->contents + h->plt.offset, | |
5541 | plt_entry, sizeof (elf_x86_64_legacy_plt_entry)); | |
5542 | /* Fill in the entry in the second PLT. */ | |
5543 | memcpy (htab->plt_bnd->contents + eh->plt_bnd.offset, | |
5544 | plt2_entry, sizeof (elf_x86_64_legacy_plt2_entry)); | |
5545 | ||
5546 | resolved_plt = htab->plt_bnd; | |
5547 | plt_offset = eh->plt_bnd.offset; | |
5548 | } | |
5549 | else | |
5550 | { | |
5551 | /* Fill in the entry in the procedure linkage table. */ | |
5552 | memcpy (plt->contents + h->plt.offset, abed->plt_entry, | |
5553 | abed->plt_entry_size); | |
5554 | ||
5555 | resolved_plt = plt; | |
5556 | plt_offset = h->plt.offset; | |
5557 | } | |
eed180f8 RM |
5558 | |
5559 | /* Insert the relocation positions of the plt section. */ | |
5560 | ||
5561 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
5562 | subtracting the size of that instruction. */ | |
ab7fede8 L |
5563 | plt_got_pcrel_offset = (gotplt->output_section->vma |
5564 | + gotplt->output_offset | |
5565 | + got_offset | |
5566 | - resolved_plt->output_section->vma | |
5567 | - resolved_plt->output_offset | |
5568 | - plt_offset | |
5569 | - plt_got_insn_size); | |
5570 | ||
5571 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 5572 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
ab7fede8 L |
5573 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"), |
5574 | output_bfd, h->root.root.string); | |
5575 | ||
5576 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
0ff2b86e | 5577 | resolved_plt->contents + plt_offset + plt_got_offset); |
cbe950e9 | 5578 | |
653165cc | 5579 | /* Fill in the entry in the global offset table, initially this |
aec6b87e L |
5580 | points to the second part of the PLT entry. Leave the entry |
5581 | as zero for undefined weak symbol in PIE. No PLT relocation | |
5582 | against undefined weak symbol in PIE. */ | |
5583 | if (!local_undefweak) | |
cbe950e9 | 5584 | { |
aec6b87e L |
5585 | bfd_put_64 (output_bfd, (plt->output_section->vma |
5586 | + plt->output_offset | |
5587 | + h->plt.offset | |
5588 | + abed->plt_lazy_offset), | |
5589 | gotplt->contents + got_offset); | |
5590 | ||
5591 | /* Fill in the entry in the .rela.plt section. */ | |
5592 | rela.r_offset = (gotplt->output_section->vma | |
5593 | + gotplt->output_offset | |
5594 | + got_offset); | |
5595 | if (h->dynindx == -1 | |
5596 | || ((bfd_link_executable (info) | |
5597 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
5598 | && h->def_regular | |
5599 | && h->type == STT_GNU_IFUNC)) | |
5600 | { | |
5601 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
5602 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
5603 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); | |
5604 | rela.r_addend = (h->root.u.def.value | |
5605 | + h->root.u.def.section->output_section->vma | |
5606 | + h->root.u.def.section->output_offset); | |
5607 | /* R_X86_64_IRELATIVE comes last. */ | |
5608 | plt_index = htab->next_irelative_index--; | |
5609 | } | |
5610 | else | |
5611 | { | |
5612 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); | |
5613 | rela.r_addend = 0; | |
5614 | plt_index = htab->next_jump_slot_index++; | |
5615 | } | |
e1f98742 | 5616 | |
aec6b87e L |
5617 | /* Don't fill PLT entry for static executables. */ |
5618 | if (plt == htab->elf.splt) | |
5619 | { | |
5620 | bfd_vma plt0_offset = h->plt.offset + plt_plt_insn_end; | |
5621 | ||
5622 | /* Put relocation index. */ | |
5623 | bfd_put_32 (output_bfd, plt_index, | |
5624 | (plt->contents + h->plt.offset | |
5625 | + abed->plt_reloc_offset)); | |
5626 | ||
5627 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
5628 | check relocation index for overflow since branch displacement | |
5629 | will overflow first. */ | |
5630 | if (plt0_offset > 0x80000000) | |
5631 | info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"), | |
5632 | output_bfd, h->root.root.string); | |
5633 | bfd_put_32 (output_bfd, - plt0_offset, | |
5634 | plt->contents + h->plt.offset + plt_plt_offset); | |
5635 | } | |
351f65ca | 5636 | |
aec6b87e L |
5637 | bed = get_elf_backend_data (output_bfd); |
5638 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
5639 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
5640 | } | |
dd7e64d4 L |
5641 | } |
5642 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
5643 | { | |
5644 | bfd_vma got_offset, plt_offset, plt_got_offset, plt_got_insn_size; | |
5645 | asection *plt, *got; | |
5646 | bfd_boolean got_after_plt; | |
5647 | int32_t got_pcrel_offset; | |
5648 | const bfd_byte *got_plt_entry; | |
5649 | ||
5650 | /* Set the entry in the GOT procedure linkage table. */ | |
5651 | plt = htab->plt_got; | |
5652 | got = htab->elf.sgot; | |
5653 | got_offset = h->got.offset; | |
5654 | ||
5655 | if (got_offset == (bfd_vma) -1 | |
5656 | || h->type == STT_GNU_IFUNC | |
5657 | || plt == NULL | |
5658 | || got == NULL) | |
5659 | abort (); | |
70256ad8 | 5660 | |
dd7e64d4 L |
5661 | /* Use the second PLT entry template for the GOT PLT since they |
5662 | are the identical. */ | |
5663 | plt_got_insn_size = elf_x86_64_bnd_arch_bed.plt_got_insn_size; | |
5664 | plt_got_offset = elf_x86_64_bnd_arch_bed.plt_got_offset; | |
5665 | if (eh->has_bnd_reloc) | |
5666 | got_plt_entry = elf_x86_64_bnd_plt2_entry; | |
5667 | else | |
70256ad8 | 5668 | { |
dd7e64d4 L |
5669 | got_plt_entry = elf_x86_64_legacy_plt2_entry; |
5670 | ||
5671 | /* Subtract 1 since there is no BND prefix. */ | |
5672 | plt_got_insn_size -= 1; | |
5673 | plt_got_offset -= 1; | |
70256ad8 | 5674 | } |
dd7e64d4 L |
5675 | |
5676 | /* Fill in the entry in the GOT procedure linkage table. */ | |
5677 | plt_offset = eh->plt_got.offset; | |
5678 | memcpy (plt->contents + plt_offset, | |
5679 | got_plt_entry, sizeof (elf_x86_64_legacy_plt2_entry)); | |
5680 | ||
5681 | /* Put offset the PC-relative instruction referring to the GOT | |
5682 | entry, subtracting the size of that instruction. */ | |
5683 | got_pcrel_offset = (got->output_section->vma | |
5684 | + got->output_offset | |
5685 | + got_offset | |
5686 | - plt->output_section->vma | |
5687 | - plt->output_offset | |
5688 | - plt_offset | |
5689 | - plt_got_insn_size); | |
5690 | ||
5691 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
5692 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
5693 | if ((got_after_plt && got_pcrel_offset < 0) | |
5694 | || (!got_after_plt && got_pcrel_offset > 0)) | |
5695 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"), | |
5696 | output_bfd, h->root.root.string); | |
5697 | ||
5698 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
5699 | plt->contents + plt_offset + plt_got_offset); | |
5700 | } | |
5701 | ||
aec6b87e L |
5702 | if (!local_undefweak |
5703 | && !h->def_regular | |
dd7e64d4 L |
5704 | && (h->plt.offset != (bfd_vma) -1 |
5705 | || eh->plt_got.offset != (bfd_vma) -1)) | |
5706 | { | |
5707 | /* Mark the symbol as undefined, rather than as defined in | |
5708 | the .plt section. Leave the value if there were any | |
5709 | relocations where pointer equality matters (this is a clue | |
5710 | for the dynamic linker, to make function pointer | |
5711 | comparisons work between an application and shared | |
5712 | library), otherwise set it to zero. If a function is only | |
5713 | called from a binary, there is no need to slow down | |
5714 | shared libraries because of that. */ | |
5715 | sym->st_shndx = SHN_UNDEF; | |
5716 | if (!h->pointer_equality_needed) | |
5717 | sym->st_value = 0; | |
70256ad8 AJ |
5718 | } |
5719 | ||
aec6b87e L |
5720 | /* Don't generate dynamic GOT relocation against undefined weak |
5721 | symbol in executable. */ | |
bffbf940 | 5722 | if (h->got.offset != (bfd_vma) -1 |
351f65ca | 5723 | && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type) |
aec6b87e L |
5724 | && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE |
5725 | && !local_undefweak) | |
053579d7 | 5726 | { |
053579d7 AJ |
5727 | Elf_Internal_Rela rela; |
5728 | ||
5729 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 5730 | up. */ |
6de2ae4a | 5731 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 5732 | abort (); |
053579d7 | 5733 | |
6de2ae4a L |
5734 | rela.r_offset = (htab->elf.sgot->output_section->vma |
5735 | + htab->elf.sgot->output_offset | |
dc810e39 | 5736 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
5737 | |
5738 | /* If this is a static link, or it is a -Bsymbolic link and the | |
5739 | symbol is defined locally or was forced to be local because | |
5740 | of a version file, we just want to emit a RELATIVE reloc. | |
5741 | The entry in the global offset table will already have been | |
5742 | initialized in the relocate_section function. */ | |
710ab287 | 5743 | if (h->def_regular |
0018b0a3 L |
5744 | && h->type == STT_GNU_IFUNC) |
5745 | { | |
0e1862bb | 5746 | if (bfd_link_pic (info)) |
710ab287 L |
5747 | { |
5748 | /* Generate R_X86_64_GLOB_DAT. */ | |
5749 | goto do_glob_dat; | |
5750 | } | |
5751 | else | |
5752 | { | |
90d60710 L |
5753 | asection *plt; |
5754 | ||
710ab287 L |
5755 | if (!h->pointer_equality_needed) |
5756 | abort (); | |
5757 | ||
5758 | /* For non-shared object, we can't use .got.plt, which | |
5759 | contains the real function addres if we need pointer | |
5760 | equality. We load the GOT entry with the PLT entry. */ | |
90d60710 | 5761 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
5762 | bfd_put_64 (output_bfd, (plt->output_section->vma |
5763 | + plt->output_offset | |
5764 | + h->plt.offset), | |
6de2ae4a | 5765 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
5766 | return TRUE; |
5767 | } | |
0018b0a3 | 5768 | } |
0e1862bb | 5769 | else if (bfd_link_pic (info) |
0018b0a3 | 5770 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
053579d7 | 5771 | { |
41bed6dd L |
5772 | if (!h->def_regular) |
5773 | return FALSE; | |
cc78d0af | 5774 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 5775 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
5776 | rela.r_addend = (h->root.u.def.value |
5777 | + h->root.u.def.section->output_section->vma | |
5778 | + h->root.u.def.section->output_offset); | |
5779 | } | |
5780 | else | |
5781 | { | |
5782 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 5783 | do_glob_dat: |
c434dee6 | 5784 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 5785 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 5786 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
5787 | rela.r_addend = 0; |
5788 | } | |
5789 | ||
351f65ca | 5790 | elf_append_rela (output_bfd, htab->elf.srelgot, &rela); |
053579d7 AJ |
5791 | } |
5792 | ||
f5385ebf | 5793 | if (h->needs_copy) |
70256ad8 | 5794 | { |
70256ad8 AJ |
5795 | Elf_Internal_Rela rela; |
5796 | ||
5797 | /* This symbol needs a copy reloc. Set it up. */ | |
5798 | ||
c434dee6 AJ |
5799 | if (h->dynindx == -1 |
5800 | || (h->root.type != bfd_link_hash_defined | |
5801 | && h->root.type != bfd_link_hash_defweak) | |
5802 | || htab->srelbss == NULL) | |
5803 | abort (); | |
70256ad8 AJ |
5804 | |
5805 | rela.r_offset = (h->root.u.def.value | |
5806 | + h->root.u.def.section->output_section->vma | |
5807 | + h->root.u.def.section->output_offset); | |
351f65ca | 5808 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 5809 | rela.r_addend = 0; |
351f65ca | 5810 | elf_append_rela (output_bfd, htab->srelbss, &rela); |
70256ad8 AJ |
5811 | } |
5812 | ||
b34976b6 | 5813 | return TRUE; |
70256ad8 AJ |
5814 | } |
5815 | ||
c25bc9fc L |
5816 | /* Finish up local dynamic symbol handling. We set the contents of |
5817 | various dynamic sections here. */ | |
5818 | ||
5819 | static bfd_boolean | |
351f65ca | 5820 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
5821 | { |
5822 | struct elf_link_hash_entry *h | |
5823 | = (struct elf_link_hash_entry *) *slot; | |
5824 | struct bfd_link_info *info | |
eed180f8 | 5825 | = (struct bfd_link_info *) inf; |
c25bc9fc | 5826 | |
351f65ca | 5827 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
c25bc9fc L |
5828 | info, h, NULL); |
5829 | } | |
5830 | ||
aec6b87e L |
5831 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
5832 | here since undefined weak symbol may not be dynamic and may not be | |
5833 | called for elf_x86_64_finish_dynamic_symbol. */ | |
5834 | ||
5835 | static bfd_boolean | |
5836 | elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
5837 | void *inf) | |
5838 | { | |
5839 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
5840 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
5841 | ||
5842 | if (h->root.type != bfd_link_hash_undefweak | |
5843 | || h->dynindx != -1) | |
5844 | return TRUE; | |
5845 | ||
5846 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, | |
5847 | info, h, NULL); | |
5848 | } | |
5849 | ||
c434dee6 AJ |
5850 | /* Used to decide how to sort relocs in an optimal manner for the |
5851 | dynamic linker, before writing them out. */ | |
5852 | ||
5853 | static enum elf_reloc_type_class | |
cae1fbbb | 5854 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
5855 | const asection *rel_sec ATTRIBUTE_UNUSED, |
5856 | const Elf_Internal_Rela *rela) | |
c434dee6 | 5857 | { |
cae1fbbb L |
5858 | bfd *abfd = info->output_bfd; |
5859 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
5860 | struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info); | |
cae1fbbb | 5861 | |
d9e3b590 L |
5862 | if (htab->elf.dynsym != NULL |
5863 | && htab->elf.dynsym->contents != NULL) | |
5864 | { | |
5865 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
5866 | dynamic symbols. */ | |
5867 | unsigned long r_symndx = htab->r_sym (rela->r_info); | |
5868 | Elf_Internal_Sym sym; | |
5869 | if (!bed->s->swap_symbol_in (abfd, | |
5870 | (htab->elf.dynsym->contents | |
5871 | + r_symndx * bed->s->sizeof_sym), | |
5872 | 0, &sym)) | |
5873 | abort (); | |
5874 | ||
5875 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) | |
5876 | return reloc_class_ifunc; | |
5877 | } | |
cae1fbbb | 5878 | |
351f65ca | 5879 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 AJ |
5880 | { |
5881 | case R_X86_64_RELATIVE: | |
1da80baa | 5882 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
5883 | return reloc_class_relative; |
5884 | case R_X86_64_JUMP_SLOT: | |
5885 | return reloc_class_plt; | |
5886 | case R_X86_64_COPY: | |
5887 | return reloc_class_copy; | |
5888 | default: | |
5889 | return reloc_class_normal; | |
5890 | } | |
5891 | } | |
5892 | ||
70256ad8 AJ |
5893 | /* Finish up the dynamic sections. */ |
5894 | ||
b34976b6 | 5895 | static bfd_boolean |
351f65ca L |
5896 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
5897 | struct bfd_link_info *info) | |
70256ad8 | 5898 | { |
351f65ca | 5899 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
5900 | bfd *dynobj; |
5901 | asection *sdyn; | |
0ff2b86e | 5902 | const struct elf_x86_64_backend_data *abed; |
70256ad8 | 5903 | |
351f65ca | 5904 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
5905 | if (htab == NULL) |
5906 | return FALSE; | |
5907 | ||
0ff2b86e L |
5908 | /* Use MPX backend data in case of BND relocation. Use .plt_bnd |
5909 | section only if there is .plt section. */ | |
5910 | abed = (htab->elf.splt != NULL && htab->plt_bnd != NULL | |
5911 | ? &elf_x86_64_bnd_arch_bed | |
5912 | : get_elf_x86_64_backend_data (output_bfd)); | |
5913 | ||
c434dee6 | 5914 | dynobj = htab->elf.dynobj; |
3d4d4302 | 5915 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
70256ad8 | 5916 | |
c434dee6 | 5917 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 5918 | { |
82e96e07 L |
5919 | bfd_byte *dyncon, *dynconend; |
5920 | const struct elf_backend_data *bed; | |
5921 | bfd_size_type sizeof_dyn; | |
70256ad8 | 5922 | |
6de2ae4a | 5923 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 5924 | abort (); |
70256ad8 | 5925 | |
82e96e07 L |
5926 | bed = get_elf_backend_data (dynobj); |
5927 | sizeof_dyn = bed->s->sizeof_dyn; | |
5928 | dyncon = sdyn->contents; | |
5929 | dynconend = sdyn->contents + sdyn->size; | |
5930 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
5931 | { |
5932 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
5933 | asection *s; |
5934 | ||
82e96e07 | 5935 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
5936 | |
5937 | switch (dyn.d_tag) | |
5938 | { | |
5939 | default: | |
053579d7 | 5940 | continue; |
70256ad8 AJ |
5941 | |
5942 | case DT_PLTGOT: | |
6de2ae4a | 5943 | s = htab->elf.sgotplt; |
8c37241b | 5944 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 5945 | break; |
70256ad8 AJ |
5946 | |
5947 | case DT_JMPREL: | |
6de2ae4a | 5948 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 5949 | break; |
70256ad8 | 5950 | |
c434dee6 | 5951 | case DT_PLTRELSZ: |
6de2ae4a | 5952 | s = htab->elf.srelplt->output_section; |
eea6121a | 5953 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
5954 | break; |
5955 | ||
5956 | case DT_RELASZ: | |
c434dee6 AJ |
5957 | /* The procedure linkage table relocs (DT_JMPREL) should |
5958 | not be included in the overall relocs (DT_RELA). | |
5959 | Therefore, we override the DT_RELASZ entry here to | |
5960 | make it not include the JMPREL relocs. Since the | |
5961 | linker script arranges for .rela.plt to follow all | |
5962 | other relocation sections, we don't have to worry | |
5963 | about changing the DT_RELA entry. */ | |
6de2ae4a | 5964 | if (htab->elf.srelplt != NULL) |
70256ad8 | 5965 | { |
6de2ae4a | 5966 | s = htab->elf.srelplt->output_section; |
eea6121a | 5967 | dyn.d_un.d_val -= s->size; |
70256ad8 AJ |
5968 | } |
5969 | break; | |
67a4f2b7 AO |
5970 | |
5971 | case DT_TLSDESC_PLT: | |
6de2ae4a | 5972 | s = htab->elf.splt; |
67a4f2b7 AO |
5973 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
5974 | + htab->tlsdesc_plt; | |
5975 | break; | |
5976 | ||
5977 | case DT_TLSDESC_GOT: | |
6de2ae4a | 5978 | s = htab->elf.sgot; |
67a4f2b7 AO |
5979 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
5980 | + htab->tlsdesc_got; | |
5981 | break; | |
70256ad8 | 5982 | } |
c434dee6 | 5983 | |
82e96e07 | 5984 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
5985 | } |
5986 | ||
c434dee6 | 5987 | /* Fill in the special first entry in the procedure linkage table. */ |
6de2ae4a | 5988 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 5989 | { |
653165cc | 5990 | /* Fill in the first entry in the procedure linkage table. */ |
eed180f8 RM |
5991 | memcpy (htab->elf.splt->contents, |
5992 | abed->plt0_entry, abed->plt_entry_size); | |
653165cc AJ |
5993 | /* Add offset for pushq GOT+8(%rip), since the instruction |
5994 | uses 6 bytes subtract this value. */ | |
5995 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
5996 | (htab->elf.sgotplt->output_section->vma |
5997 | + htab->elf.sgotplt->output_offset | |
653165cc | 5998 | + 8 |
6de2ae4a L |
5999 | - htab->elf.splt->output_section->vma |
6000 | - htab->elf.splt->output_offset | |
653165cc | 6001 | - 6), |
eed180f8 RM |
6002 | htab->elf.splt->contents + abed->plt0_got1_offset); |
6003 | /* Add offset for the PC-relative instruction accessing GOT+16, | |
6004 | subtracting the offset to the end of that instruction. */ | |
653165cc | 6005 | bfd_put_32 (output_bfd, |
6de2ae4a L |
6006 | (htab->elf.sgotplt->output_section->vma |
6007 | + htab->elf.sgotplt->output_offset | |
653165cc | 6008 | + 16 |
6de2ae4a L |
6009 | - htab->elf.splt->output_section->vma |
6010 | - htab->elf.splt->output_offset | |
eed180f8 RM |
6011 | - abed->plt0_got2_insn_end), |
6012 | htab->elf.splt->contents + abed->plt0_got2_offset); | |
653165cc | 6013 | |
eed180f8 RM |
6014 | elf_section_data (htab->elf.splt->output_section) |
6015 | ->this_hdr.sh_entsize = abed->plt_entry_size; | |
67a4f2b7 AO |
6016 | |
6017 | if (htab->tlsdesc_plt) | |
6018 | { | |
6019 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6de2ae4a | 6020 | htab->elf.sgot->contents + htab->tlsdesc_got); |
67a4f2b7 | 6021 | |
6de2ae4a | 6022 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, |
eed180f8 | 6023 | abed->plt0_entry, abed->plt_entry_size); |
67a4f2b7 AO |
6024 | |
6025 | /* Add offset for pushq GOT+8(%rip), since the | |
6026 | instruction uses 6 bytes subtract this value. */ | |
6027 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
6028 | (htab->elf.sgotplt->output_section->vma |
6029 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 6030 | + 8 |
6de2ae4a L |
6031 | - htab->elf.splt->output_section->vma |
6032 | - htab->elf.splt->output_offset | |
67a4f2b7 AO |
6033 | - htab->tlsdesc_plt |
6034 | - 6), | |
eed180f8 RM |
6035 | htab->elf.splt->contents |
6036 | + htab->tlsdesc_plt + abed->plt0_got1_offset); | |
6037 | /* Add offset for the PC-relative instruction accessing GOT+TDG, | |
6038 | where TGD stands for htab->tlsdesc_got, subtracting the offset | |
6039 | to the end of that instruction. */ | |
67a4f2b7 | 6040 | bfd_put_32 (output_bfd, |
6de2ae4a L |
6041 | (htab->elf.sgot->output_section->vma |
6042 | + htab->elf.sgot->output_offset | |
67a4f2b7 | 6043 | + htab->tlsdesc_got |
6de2ae4a L |
6044 | - htab->elf.splt->output_section->vma |
6045 | - htab->elf.splt->output_offset | |
67a4f2b7 | 6046 | - htab->tlsdesc_plt |
eed180f8 RM |
6047 | - abed->plt0_got2_insn_end), |
6048 | htab->elf.splt->contents | |
6049 | + htab->tlsdesc_plt + abed->plt0_got2_offset); | |
67a4f2b7 | 6050 | } |
70256ad8 | 6051 | } |
70256ad8 AJ |
6052 | } |
6053 | ||
0ff2b86e L |
6054 | if (htab->plt_bnd != NULL) |
6055 | elf_section_data (htab->plt_bnd->output_section) | |
6056 | ->this_hdr.sh_entsize = sizeof (elf_x86_64_bnd_plt2_entry); | |
6057 | ||
6de2ae4a | 6058 | if (htab->elf.sgotplt) |
70256ad8 | 6059 | { |
56d4289c L |
6060 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
6061 | { | |
6062 | (*_bfd_error_handler) | |
6063 | (_("discarded output section: `%A'"), htab->elf.sgotplt); | |
6064 | return FALSE; | |
6065 | } | |
6066 | ||
c434dee6 | 6067 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 6068 | if (htab->elf.sgotplt->size > 0) |
c434dee6 AJ |
6069 | { |
6070 | /* Set the first entry in the global offset table to the address of | |
6071 | the dynamic section. */ | |
6072 | if (sdyn == NULL) | |
6de2ae4a | 6073 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); |
c434dee6 AJ |
6074 | else |
6075 | bfd_put_64 (output_bfd, | |
6076 | sdyn->output_section->vma + sdyn->output_offset, | |
6de2ae4a | 6077 | htab->elf.sgotplt->contents); |
c434dee6 | 6078 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
6de2ae4a L |
6079 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); |
6080 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
c434dee6 | 6081 | } |
70256ad8 | 6082 | |
6de2ae4a | 6083 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = |
c434dee6 AJ |
6084 | GOT_ENTRY_SIZE; |
6085 | } | |
70256ad8 | 6086 | |
e41b3a13 | 6087 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
6088 | if (htab->plt_eh_frame != NULL |
6089 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
6090 | { |
6091 | if (htab->elf.splt != NULL | |
6092 | && htab->elf.splt->size != 0 | |
6093 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
6094 | && htab->elf.splt->output_section != NULL | |
6095 | && htab->plt_eh_frame->output_section != NULL) | |
6096 | { | |
6097 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
6098 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
6099 | + htab->plt_eh_frame->output_offset | |
6100 | + PLT_FDE_START_OFFSET; | |
6101 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
6102 | htab->plt_eh_frame->contents | |
6103 | + PLT_FDE_START_OFFSET); | |
6104 | } | |
dbaa2011 | 6105 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
6106 | { |
6107 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
6108 | htab->plt_eh_frame, | |
6109 | htab->plt_eh_frame->contents)) | |
6110 | return FALSE; | |
6111 | } | |
6112 | } | |
6113 | ||
6de2ae4a L |
6114 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
6115 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
6116 | = GOT_ENTRY_SIZE; |
6117 | ||
c25bc9fc L |
6118 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
6119 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 6120 | elf_x86_64_finish_local_dynamic_symbol, |
c25bc9fc L |
6121 | info); |
6122 | ||
aec6b87e L |
6123 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
6124 | if (bfd_link_pie (info)) | |
6125 | bfd_hash_traverse (&info->hash->table, | |
6126 | elf_x86_64_pie_finish_undefweak_symbol, | |
6127 | info); | |
6128 | ||
b34976b6 | 6129 | return TRUE; |
8d88c4ca NC |
6130 | } |
6131 | ||
3972882e | 6132 | /* Return an array of PLT entry symbol values. */ |
4c45e5c9 | 6133 | |
3972882e L |
6134 | static bfd_vma * |
6135 | elf_x86_64_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt, | |
6136 | asection *relplt) | |
4c45e5c9 | 6137 | { |
3972882e L |
6138 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
6139 | arelent *p; | |
6140 | long count, i; | |
6141 | bfd_vma *plt_sym_val; | |
144bed8d | 6142 | bfd_vma plt_offset; |
3972882e L |
6143 | bfd_byte *plt_contents; |
6144 | const struct elf_x86_64_backend_data *bed; | |
6145 | Elf_Internal_Shdr *hdr; | |
6146 | asection *plt_bnd; | |
144bed8d | 6147 | |
3972882e L |
6148 | /* Get the .plt section contents. PLT passed down may point to the |
6149 | .plt.bnd section. Make sure that PLT always points to the .plt | |
6150 | section. */ | |
6151 | plt_bnd = bfd_get_section_by_name (abfd, ".plt.bnd"); | |
6152 | if (plt_bnd) | |
6153 | { | |
6154 | if (plt != plt_bnd) | |
6155 | abort (); | |
6156 | plt = bfd_get_section_by_name (abfd, ".plt"); | |
6157 | if (plt == NULL) | |
6158 | abort (); | |
6159 | bed = &elf_x86_64_bnd_arch_bed; | |
6160 | } | |
6161 | else | |
6162 | bed = get_elf_x86_64_backend_data (abfd); | |
cca5b8b6 | 6163 | |
3972882e L |
6164 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); |
6165 | if (plt_contents == NULL) | |
6166 | return NULL; | |
6167 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
6168 | plt_contents, 0, plt->size)) | |
144bed8d | 6169 | { |
3972882e L |
6170 | bad_return: |
6171 | free (plt_contents); | |
6172 | return NULL; | |
144bed8d L |
6173 | } |
6174 | ||
3972882e L |
6175 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
6176 | if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) | |
6177 | goto bad_return; | |
144bed8d | 6178 | |
3972882e L |
6179 | hdr = &elf_section_data (relplt)->this_hdr; |
6180 | count = relplt->size / hdr->sh_entsize; | |
144bed8d | 6181 | |
3972882e L |
6182 | plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count); |
6183 | if (plt_sym_val == NULL) | |
6184 | goto bad_return; | |
cca5b8b6 | 6185 | |
35181b3e | 6186 | for (i = 0; i < count; i++) |
3972882e | 6187 | plt_sym_val[i] = -1; |
cca5b8b6 | 6188 | |
3972882e L |
6189 | plt_offset = bed->plt_entry_size; |
6190 | p = relplt->relocation; | |
6191 | for (i = 0; i < count; i++, p++) | |
144bed8d | 6192 | { |
3972882e | 6193 | long reloc_index; |
144bed8d | 6194 | |
6f25f223 | 6195 | /* Skip unknown relocation. */ |
533d0af0 | 6196 | if (p->howto == NULL) |
6f25f223 | 6197 | continue; |
533d0af0 | 6198 | |
3972882e L |
6199 | if (p->howto->type != R_X86_64_JUMP_SLOT |
6200 | && p->howto->type != R_X86_64_IRELATIVE) | |
6201 | continue; | |
144bed8d | 6202 | |
3972882e L |
6203 | reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset |
6204 | + bed->plt_reloc_offset)); | |
ec1f73bb | 6205 | if (reloc_index < count) |
144bed8d | 6206 | { |
ec1f73bb AM |
6207 | if (plt_bnd) |
6208 | { | |
6209 | /* This is the index in .plt section. */ | |
6210 | long plt_index = plt_offset / bed->plt_entry_size; | |
6211 | /* Store VMA + the offset in .plt.bnd section. */ | |
6212 | plt_sym_val[reloc_index] = | |
6213 | (plt_bnd->vma | |
6214 | + (plt_index - 1) * sizeof (elf_x86_64_legacy_plt2_entry)); | |
6215 | } | |
6216 | else | |
6217 | plt_sym_val[reloc_index] = plt->vma + plt_offset; | |
144bed8d L |
6218 | } |
6219 | plt_offset += bed->plt_entry_size; | |
fca6ae69 L |
6220 | |
6221 | /* PR binutils/18437: Skip extra relocations in the .rela.plt | |
6222 | section. */ | |
6223 | if (plt_offset >= plt->size) | |
6224 | break; | |
144bed8d L |
6225 | } |
6226 | ||
3972882e L |
6227 | free (plt_contents); |
6228 | ||
6229 | return plt_sym_val; | |
4c45e5c9 | 6230 | } |
8df9fc9d | 6231 | |
0ff2b86e L |
6232 | /* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section |
6233 | support. */ | |
6234 | ||
6235 | static long | |
6236 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
6237 | long symcount, | |
6238 | asymbol **syms, | |
6239 | long dynsymcount, | |
6240 | asymbol **dynsyms, | |
6241 | asymbol **ret) | |
6242 | { | |
3972882e L |
6243 | /* Pass the .plt.bnd section to _bfd_elf_ifunc_get_synthetic_symtab |
6244 | as PLT if it exists. */ | |
6245 | asection *plt = bfd_get_section_by_name (abfd, ".plt.bnd"); | |
0ff2b86e | 6246 | if (plt == NULL) |
3972882e L |
6247 | plt = bfd_get_section_by_name (abfd, ".plt"); |
6248 | return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms, | |
6249 | dynsymcount, dynsyms, ret, | |
6250 | plt, | |
6251 | elf_x86_64_get_plt_sym_val); | |
0ff2b86e L |
6252 | } |
6253 | ||
d2b2c203 DJ |
6254 | /* Handle an x86-64 specific section when reading an object file. This |
6255 | is called when elfcode.h finds a section with an unknown type. */ | |
6256 | ||
6257 | static bfd_boolean | |
0c723101 L |
6258 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
6259 | const char *name, int shindex) | |
d2b2c203 DJ |
6260 | { |
6261 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
6262 | return FALSE; | |
6263 | ||
6dc132d9 | 6264 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
6265 | return FALSE; |
6266 | ||
6267 | return TRUE; | |
6268 | } | |
6269 | ||
3b22753a L |
6270 | /* Hook called by the linker routine which adds symbols from an object |
6271 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
6272 | of .bss. */ | |
6273 | ||
6274 | static bfd_boolean | |
351f65ca | 6275 | elf_x86_64_add_symbol_hook (bfd *abfd, |
a43942db | 6276 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
351f65ca L |
6277 | Elf_Internal_Sym *sym, |
6278 | const char **namep ATTRIBUTE_UNUSED, | |
6279 | flagword *flagsp ATTRIBUTE_UNUSED, | |
6280 | asection **secp, | |
6281 | bfd_vma *valp) | |
3b22753a L |
6282 | { |
6283 | asection *lcomm; | |
6284 | ||
6285 | switch (sym->st_shndx) | |
6286 | { | |
6287 | case SHN_X86_64_LCOMMON: | |
6288 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
6289 | if (lcomm == NULL) | |
6290 | { | |
6291 | lcomm = bfd_make_section_with_flags (abfd, | |
6292 | "LARGE_COMMON", | |
6293 | (SEC_ALLOC | |
6294 | | SEC_IS_COMMON | |
6295 | | SEC_LINKER_CREATED)); | |
6296 | if (lcomm == NULL) | |
6297 | return FALSE; | |
6298 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
6299 | } | |
6300 | *secp = lcomm; | |
6301 | *valp = sym->st_size; | |
c35bdf6e | 6302 | return TRUE; |
3b22753a | 6303 | } |
d8045f23 | 6304 | |
3b22753a L |
6305 | return TRUE; |
6306 | } | |
6307 | ||
6308 | ||
6309 | /* Given a BFD section, try to locate the corresponding ELF section | |
6310 | index. */ | |
6311 | ||
6312 | static bfd_boolean | |
351f65ca L |
6313 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
6314 | asection *sec, int *index_return) | |
3b22753a L |
6315 | { |
6316 | if (sec == &_bfd_elf_large_com_section) | |
6317 | { | |
91d6fa6a | 6318 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
6319 | return TRUE; |
6320 | } | |
6321 | return FALSE; | |
6322 | } | |
6323 | ||
6324 | /* Process a symbol. */ | |
6325 | ||
6326 | static void | |
351f65ca L |
6327 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
6328 | asymbol *asym) | |
3b22753a L |
6329 | { |
6330 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
6331 | ||
6332 | switch (elfsym->internal_elf_sym.st_shndx) | |
6333 | { | |
6334 | case SHN_X86_64_LCOMMON: | |
6335 | asym->section = &_bfd_elf_large_com_section; | |
6336 | asym->value = elfsym->internal_elf_sym.st_size; | |
6337 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
6338 | asym->flags &= ~BSF_GLOBAL; | |
6339 | break; | |
6340 | } | |
6341 | } | |
6342 | ||
6343 | static bfd_boolean | |
351f65ca | 6344 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
6345 | { |
6346 | return (sym->st_shndx == SHN_COMMON | |
6347 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
6348 | } | |
6349 | ||
6350 | static unsigned int | |
351f65ca | 6351 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
6352 | { |
6353 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
6354 | return SHN_COMMON; | |
6355 | else | |
6356 | return SHN_X86_64_LCOMMON; | |
6357 | } | |
6358 | ||
6359 | static asection * | |
351f65ca | 6360 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
6361 | { |
6362 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
6363 | return bfd_com_section_ptr; | |
6364 | else | |
6365 | return &_bfd_elf_large_com_section; | |
6366 | } | |
6367 | ||
6368 | static bfd_boolean | |
5d13b3b3 AM |
6369 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
6370 | const Elf_Internal_Sym *sym, | |
351f65ca | 6371 | asection **psec, |
5d13b3b3 AM |
6372 | bfd_boolean newdef, |
6373 | bfd_boolean olddef, | |
351f65ca | 6374 | bfd *oldbfd, |
5d13b3b3 | 6375 | const asection *oldsec) |
3b22753a L |
6376 | { |
6377 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
6378 | normal common symbol. We turn the large common symbol into a |
6379 | normal one. */ | |
5d13b3b3 | 6380 | if (!olddef |
3b22753a | 6381 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
6382 | && !newdef |
6383 | && bfd_is_com_section (*psec) | |
6384 | && oldsec != *psec) | |
3b22753a | 6385 | { |
00492999 | 6386 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 6387 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
6388 | { |
6389 | h->root.u.c.p->section | |
6390 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
6391 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
6392 | } | |
6393 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
6394 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
6395 | *psec = bfd_com_section_ptr; | |
3b22753a L |
6396 | } |
6397 | ||
6398 | return TRUE; | |
6399 | } | |
6400 | ||
6401 | static int | |
351f65ca L |
6402 | elf_x86_64_additional_program_headers (bfd *abfd, |
6403 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
6404 | { |
6405 | asection *s; | |
9a2e389a | 6406 | int count = 0; |
3b22753a L |
6407 | |
6408 | /* Check to see if we need a large readonly segment. */ | |
6409 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
6410 | if (s && (s->flags & SEC_LOAD)) | |
6411 | count++; | |
6412 | ||
6413 | /* Check to see if we need a large data segment. Since .lbss sections | |
6414 | is placed right after the .bss section, there should be no need for | |
6415 | a large data segment just because of .lbss. */ | |
6416 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
6417 | if (s && (s->flags & SEC_LOAD)) | |
6418 | count++; | |
6419 | ||
6420 | return count; | |
6421 | } | |
6422 | ||
fdc90cb4 JJ |
6423 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
6424 | ||
6425 | static bfd_boolean | |
351f65ca | 6426 | elf_x86_64_hash_symbol (struct elf_link_hash_entry *h) |
fdc90cb4 JJ |
6427 | { |
6428 | if (h->plt.offset != (bfd_vma) -1 | |
6429 | && !h->def_regular | |
6430 | && !h->pointer_equality_needed) | |
6431 | return FALSE; | |
6432 | ||
6433 | return _bfd_elf_hash_symbol (h); | |
6434 | } | |
6435 | ||
c543bf9a L |
6436 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
6437 | ||
6438 | static bfd_boolean | |
6439 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
6440 | const bfd_target *output) | |
6441 | { | |
6442 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
6443 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
6444 | && _bfd_elf_relocs_compatible (input, output)); | |
6445 | } | |
6446 | ||
9a2e389a | 6447 | static const struct bfd_elf_special_section |
351f65ca | 6448 | elf_x86_64_special_sections[]= |
3b22753a | 6449 | { |
0112cd26 NC |
6450 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
6451 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
6452 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
6453 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
6454 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
6455 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
6456 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
6457 | }; |
6458 | ||
6d00b590 | 6459 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
6460 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
6461 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 6462 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 6463 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 6464 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 6465 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 6466 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
6467 | |
6468 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 6469 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
6470 | #define elf_backend_want_got_plt 1 |
6471 | #define elf_backend_plt_readonly 1 | |
6472 | #define elf_backend_want_plt_sym 0 | |
6473 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 6474 | #define elf_backend_rela_normal 1 |
e41b3a13 | 6475 | #define elf_backend_plt_alignment 4 |
f7483970 | 6476 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 6477 | #define elf_backend_caches_rawsize 1 |
70256ad8 | 6478 | |
351f65ca | 6479 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 6480 | |
70256ad8 | 6481 | #define bfd_elf64_bfd_link_hash_table_create \ |
351f65ca | 6482 | elf_x86_64_link_hash_table_create |
351f65ca | 6483 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 6484 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 6485 | elf_x86_64_reloc_name_lookup |
70256ad8 | 6486 | |
351f65ca | 6487 | #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol |
c543bf9a | 6488 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca L |
6489 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
6490 | #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol | |
6491 | #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections | |
6492 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections | |
6493 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
6494 | #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook | |
351f65ca L |
6495 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus |
6496 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
6497 | #ifdef CORE_HEADER |
6498 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
6499 | #endif | |
351f65ca L |
6500 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
6501 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
6502 | #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections | |
6503 | #define elf_backend_always_size_sections elf_x86_64_always_size_sections | |
74541ad4 | 6504 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 6505 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
351f65ca | 6506 | #define bfd_elf64_mkobject elf_x86_64_mkobject |
0ff2b86e | 6507 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 6508 | |
d2b2c203 | 6509 | #define elf_backend_section_from_shdr \ |
351f65ca | 6510 | elf_x86_64_section_from_shdr |
d2b2c203 | 6511 | |
3b22753a | 6512 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 6513 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 6514 | #define elf_backend_add_symbol_hook \ |
351f65ca | 6515 | elf_x86_64_add_symbol_hook |
3b22753a | 6516 | #define elf_backend_symbol_processing \ |
351f65ca | 6517 | elf_x86_64_symbol_processing |
3b22753a | 6518 | #define elf_backend_common_section_index \ |
351f65ca | 6519 | elf_x86_64_common_section_index |
3b22753a | 6520 | #define elf_backend_common_section \ |
351f65ca | 6521 | elf_x86_64_common_section |
3b22753a | 6522 | #define elf_backend_common_definition \ |
351f65ca | 6523 | elf_x86_64_common_definition |
3b22753a | 6524 | #define elf_backend_merge_symbol \ |
351f65ca | 6525 | elf_x86_64_merge_symbol |
3b22753a | 6526 | #define elf_backend_special_sections \ |
351f65ca | 6527 | elf_x86_64_special_sections |
3b22753a | 6528 | #define elf_backend_additional_program_headers \ |
351f65ca | 6529 | elf_x86_64_additional_program_headers |
fdc90cb4 | 6530 | #define elf_backend_hash_symbol \ |
351f65ca | 6531 | elf_x86_64_hash_symbol |
8f79b794 L |
6532 | #define elf_backend_omit_section_dynsym \ |
6533 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
aec6b87e L |
6534 | #define elf_backend_fixup_symbol \ |
6535 | elf_x86_64_fixup_symbol | |
3b22753a | 6536 | |
8d88c4ca | 6537 | #include "elf64-target.h" |
9d7cbccd | 6538 | |
6036f486 ES |
6539 | /* CloudABI support. */ |
6540 | ||
6541 | #undef TARGET_LITTLE_SYM | |
6542 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec | |
6543 | #undef TARGET_LITTLE_NAME | |
6544 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" | |
6545 | ||
6546 | #undef ELF_OSABI | |
6547 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
6548 | ||
6549 | #undef elf64_bed | |
6550 | #define elf64_bed elf64_x86_64_cloudabi_bed | |
6551 | ||
6552 | #include "elf64-target.h" | |
6553 | ||
9d7cbccd NC |
6554 | /* FreeBSD support. */ |
6555 | ||
6556 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6557 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
9d7cbccd NC |
6558 | #undef TARGET_LITTLE_NAME |
6559 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
6560 | ||
d1036acb L |
6561 | #undef ELF_OSABI |
6562 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 6563 | |
9d7cbccd NC |
6564 | #undef elf64_bed |
6565 | #define elf64_bed elf64_x86_64_fbsd_bed | |
6566 | ||
6567 | #include "elf64-target.h" | |
8a9036a4 | 6568 | |
a6cc6b3b RO |
6569 | /* Solaris 2 support. */ |
6570 | ||
6571 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6572 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
6573 | #undef TARGET_LITTLE_NAME |
6574 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
6575 | ||
6576 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
6577 | objects won't be recognized. */ | |
6578 | #undef ELF_OSABI | |
6579 | ||
6580 | #undef elf64_bed | |
6581 | #define elf64_bed elf64_x86_64_sol2_bed | |
6582 | ||
7dc98aea RO |
6583 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
6584 | boundary. */ | |
84865015 | 6585 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
6586 | #define elf_backend_static_tls_alignment 16 |
6587 | ||
a6cc6b3b RO |
6588 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
6589 | ||
6590 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
6591 | File, p.63. */ | |
84865015 | 6592 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
6593 | #define elf_backend_want_plt_sym 1 |
6594 | ||
84865015 NC |
6595 | #undef elf_backend_strtab_flags |
6596 | #define elf_backend_strtab_flags SHF_STRINGS | |
6597 | ||
6598 | static bfd_boolean | |
5522f910 NC |
6599 | elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
6600 | bfd *obfd ATTRIBUTE_UNUSED, | |
6601 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
6602 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
6603 | { |
6604 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
6605 | and sh_link fields of Solaris specific section types. */ | |
6606 | return FALSE; | |
6607 | } | |
6608 | ||
5522f910 NC |
6609 | #undef elf_backend_copy_special_section_fields |
6610 | #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields | |
84865015 | 6611 | |
a6cc6b3b RO |
6612 | #include "elf64-target.h" |
6613 | ||
8059fb19 RM |
6614 | /* Native Client support. */ |
6615 | ||
64b384e1 RM |
6616 | static bfd_boolean |
6617 | elf64_x86_64_nacl_elf_object_p (bfd *abfd) | |
6618 | { | |
6619 | /* Set the right machine number for a NaCl x86-64 ELF64 file. */ | |
6620 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl); | |
6621 | return TRUE; | |
6622 | } | |
6623 | ||
8059fb19 | 6624 | #undef TARGET_LITTLE_SYM |
6d00b590 | 6625 | #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec |
8059fb19 RM |
6626 | #undef TARGET_LITTLE_NAME |
6627 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
6628 | #undef elf64_bed | |
6629 | #define elf64_bed elf64_x86_64_nacl_bed | |
6630 | ||
6631 | #undef ELF_MAXPAGESIZE | |
6632 | #undef ELF_MINPAGESIZE | |
6633 | #undef ELF_COMMONPAGESIZE | |
6634 | #define ELF_MAXPAGESIZE 0x10000 | |
6635 | #define ELF_MINPAGESIZE 0x10000 | |
6636 | #define ELF_COMMONPAGESIZE 0x10000 | |
6637 | ||
6638 | /* Restore defaults. */ | |
6639 | #undef ELF_OSABI | |
6640 | #undef elf_backend_static_tls_alignment | |
6641 | #undef elf_backend_want_plt_sym | |
6642 | #define elf_backend_want_plt_sym 0 | |
84865015 | 6643 | #undef elf_backend_strtab_flags |
5522f910 | 6644 | #undef elf_backend_copy_special_section_fields |
8059fb19 RM |
6645 | |
6646 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
6647 | ||
6648 | #undef elf_backend_plt_alignment | |
6649 | #define elf_backend_plt_alignment 5 | |
6650 | #define NACL_PLT_ENTRY_SIZE 64 | |
6651 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
6652 | ||
6653 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
6654 | { | |
6655 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
6656 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ | |
6657 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
6658 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
6659 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
6660 | ||
ea2d813e | 6661 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
70cc877f | 6662 | 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */ |
ea2d813e RM |
6663 | |
6664 | /* 32 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 6665 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 6666 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 6667 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 6668 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 6669 | 0x66, /* excess data16 prefix */ |
ea2d813e | 6670 | 0x90 /* nop */ |
8059fb19 RM |
6671 | }; |
6672 | ||
6673 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6674 | { | |
6675 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
6676 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
6677 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
6678 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
6679 | ||
6680 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
3ddf1bdd | 6681 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
6682 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
6683 | ||
6684 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6685 | 0x68, /* pushq immediate */ | |
6686 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
6687 | 0xe9, /* jmp relative */ | |
6688 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
6689 | ||
6690 | /* 22 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 6691 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
6692 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
6693 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ | |
6694 | }; | |
6695 | ||
6696 | /* .eh_frame covering the .plt section. */ | |
6697 | ||
6698 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
6699 | { | |
6700 | #if (PLT_CIE_LENGTH != 20 \ | |
6701 | || PLT_FDE_LENGTH != 36 \ | |
6702 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
6703 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
6704 | # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!" | |
6705 | #endif | |
6706 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
6707 | 0, 0, 0, 0, /* CIE ID */ | |
6708 | 1, /* CIE version */ | |
6709 | 'z', 'R', 0, /* Augmentation string */ | |
6710 | 1, /* Code alignment factor */ | |
6711 | 0x78, /* Data alignment factor */ | |
6712 | 16, /* Return address column */ | |
6713 | 1, /* Augmentation size */ | |
6714 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
6715 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
6716 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
6717 | DW_CFA_nop, DW_CFA_nop, | |
6718 | ||
6719 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
6720 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
6721 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
6722 | 0, 0, 0, 0, /* .plt size goes here */ | |
6723 | 0, /* Augmentation size */ | |
6724 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
6725 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
6726 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
6727 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
6728 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
6729 | 13, /* Block length */ | |
6730 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
6731 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
6732 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
6733 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
6734 | DW_CFA_nop, DW_CFA_nop | |
6735 | }; | |
6736 | ||
6737 | static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed = | |
6738 | { | |
6739 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ | |
6740 | elf_x86_64_nacl_plt_entry, /* plt_entry */ | |
6741 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
6742 | 2, /* plt0_got1_offset */ | |
6743 | 9, /* plt0_got2_offset */ | |
6744 | 13, /* plt0_got2_insn_end */ | |
6745 | 3, /* plt_got_offset */ | |
6746 | 33, /* plt_reloc_offset */ | |
6747 | 38, /* plt_plt_offset */ | |
6748 | 7, /* plt_got_insn_size */ | |
6749 | 42, /* plt_plt_insn_end */ | |
6750 | 32, /* plt_lazy_offset */ | |
6751 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ | |
6752 | sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */ | |
6753 | }; | |
6754 | ||
6755 | #undef elf_backend_arch_data | |
6756 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
6757 | ||
64b384e1 RM |
6758 | #undef elf_backend_object_p |
6759 | #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p | |
5a68afcf RM |
6760 | #undef elf_backend_modify_segment_map |
6761 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
6762 | #undef elf_backend_modify_program_headers | |
6763 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
6764 | #undef elf_backend_final_write_processing |
6765 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 6766 | |
8059fb19 RM |
6767 | #include "elf64-target.h" |
6768 | ||
6769 | /* Native Client x32 support. */ | |
6770 | ||
64b384e1 RM |
6771 | static bfd_boolean |
6772 | elf32_x86_64_nacl_elf_object_p (bfd *abfd) | |
6773 | { | |
6774 | /* Set the right machine number for a NaCl x86-64 ELF32 file. */ | |
6775 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl); | |
6776 | return TRUE; | |
6777 | } | |
6778 | ||
8059fb19 | 6779 | #undef TARGET_LITTLE_SYM |
6d00b590 | 6780 | #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec |
8059fb19 RM |
6781 | #undef TARGET_LITTLE_NAME |
6782 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" | |
6783 | #undef elf32_bed | |
6784 | #define elf32_bed elf32_x86_64_nacl_bed | |
6785 | ||
6786 | #define bfd_elf32_bfd_link_hash_table_create \ | |
6787 | elf_x86_64_link_hash_table_create | |
8059fb19 RM |
6788 | #define bfd_elf32_bfd_reloc_type_lookup \ |
6789 | elf_x86_64_reloc_type_lookup | |
6790 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
6791 | elf_x86_64_reloc_name_lookup | |
6792 | #define bfd_elf32_mkobject \ | |
6793 | elf_x86_64_mkobject | |
b7365e5d L |
6794 | #define bfd_elf32_get_synthetic_symtab \ |
6795 | elf_x86_64_get_synthetic_symtab | |
8059fb19 RM |
6796 | |
6797 | #undef elf_backend_object_p | |
6798 | #define elf_backend_object_p \ | |
64b384e1 | 6799 | elf32_x86_64_nacl_elf_object_p |
8059fb19 RM |
6800 | |
6801 | #undef elf_backend_bfd_from_remote_memory | |
6802 | #define elf_backend_bfd_from_remote_memory \ | |
6803 | _bfd_elf32_bfd_from_remote_memory | |
6804 | ||
6805 | #undef elf_backend_size_info | |
6806 | #define elf_backend_size_info \ | |
6807 | _bfd_elf32_size_info | |
6808 | ||
6809 | #include "elf32-target.h" | |
6810 | ||
6811 | /* Restore defaults. */ | |
5a68afcf | 6812 | #undef elf_backend_object_p |
8059fb19 | 6813 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
6814 | #undef elf_backend_bfd_from_remote_memory |
6815 | #undef elf_backend_size_info | |
6816 | #undef elf_backend_modify_segment_map | |
6817 | #undef elf_backend_modify_program_headers | |
887badb3 | 6818 | #undef elf_backend_final_write_processing |
8059fb19 | 6819 | |
8a9036a4 L |
6820 | /* Intel L1OM support. */ |
6821 | ||
6822 | static bfd_boolean | |
6823 | elf64_l1om_elf_object_p (bfd *abfd) | |
6824 | { | |
6825 | /* Set the right machine number for an L1OM elf64 file. */ | |
6826 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
6827 | return TRUE; | |
6828 | } | |
6829 | ||
6830 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6831 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
6832 | #undef TARGET_LITTLE_NAME |
6833 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
6834 | #undef ELF_ARCH | |
6835 | #define ELF_ARCH bfd_arch_l1om | |
6836 | ||
6837 | #undef ELF_MACHINE_CODE | |
6838 | #define ELF_MACHINE_CODE EM_L1OM | |
6839 | ||
6840 | #undef ELF_OSABI | |
6841 | ||
6842 | #undef elf64_bed | |
6843 | #define elf64_bed elf64_l1om_bed | |
6844 | ||
6845 | #undef elf_backend_object_p | |
6846 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
6847 | ||
8059fb19 RM |
6848 | /* Restore defaults. */ |
6849 | #undef ELF_MAXPAGESIZE | |
6850 | #undef ELF_MINPAGESIZE | |
6851 | #undef ELF_COMMONPAGESIZE | |
6852 | #define ELF_MAXPAGESIZE 0x200000 | |
6853 | #define ELF_MINPAGESIZE 0x1000 | |
6854 | #define ELF_COMMONPAGESIZE 0x1000 | |
6855 | #undef elf_backend_plt_alignment | |
6856 | #define elf_backend_plt_alignment 4 | |
6857 | #undef elf_backend_arch_data | |
6858 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 6859 | |
8a9036a4 L |
6860 | #include "elf64-target.h" |
6861 | ||
6862 | /* FreeBSD L1OM support. */ | |
6863 | ||
6864 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6865 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
6866 | #undef TARGET_LITTLE_NAME |
6867 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
6868 | ||
6869 | #undef ELF_OSABI | |
6870 | #define ELF_OSABI ELFOSABI_FREEBSD | |
6871 | ||
6872 | #undef elf64_bed | |
6873 | #define elf64_bed elf64_l1om_fbsd_bed | |
6874 | ||
8a9036a4 | 6875 | #include "elf64-target.h" |
351f65ca | 6876 | |
7a9068fe L |
6877 | /* Intel K1OM support. */ |
6878 | ||
6879 | static bfd_boolean | |
6880 | elf64_k1om_elf_object_p (bfd *abfd) | |
6881 | { | |
6882 | /* Set the right machine number for an K1OM elf64 file. */ | |
6883 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
6884 | return TRUE; | |
6885 | } | |
6886 | ||
6887 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6888 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
6889 | #undef TARGET_LITTLE_NAME |
6890 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
6891 | #undef ELF_ARCH | |
6892 | #define ELF_ARCH bfd_arch_k1om | |
6893 | ||
6894 | #undef ELF_MACHINE_CODE | |
6895 | #define ELF_MACHINE_CODE EM_K1OM | |
6896 | ||
6897 | #undef ELF_OSABI | |
6898 | ||
6899 | #undef elf64_bed | |
6900 | #define elf64_bed elf64_k1om_bed | |
6901 | ||
6902 | #undef elf_backend_object_p | |
6903 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
6904 | ||
6905 | #undef elf_backend_static_tls_alignment | |
6906 | ||
6907 | #undef elf_backend_want_plt_sym | |
6908 | #define elf_backend_want_plt_sym 0 | |
6909 | ||
6910 | #include "elf64-target.h" | |
6911 | ||
6912 | /* FreeBSD K1OM support. */ | |
6913 | ||
6914 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6915 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
6916 | #undef TARGET_LITTLE_NAME |
6917 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
6918 | ||
6919 | #undef ELF_OSABI | |
6920 | #define ELF_OSABI ELFOSABI_FREEBSD | |
6921 | ||
6922 | #undef elf64_bed | |
6923 | #define elf64_bed elf64_k1om_fbsd_bed | |
6924 | ||
6925 | #include "elf64-target.h" | |
6926 | ||
351f65ca L |
6927 | /* 32bit x86-64 support. */ |
6928 | ||
351f65ca | 6929 | #undef TARGET_LITTLE_SYM |
6d00b590 | 6930 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
6931 | #undef TARGET_LITTLE_NAME |
6932 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 6933 | #undef elf32_bed |
351f65ca L |
6934 | |
6935 | #undef ELF_ARCH | |
6936 | #define ELF_ARCH bfd_arch_i386 | |
6937 | ||
6938 | #undef ELF_MACHINE_CODE | |
6939 | #define ELF_MACHINE_CODE EM_X86_64 | |
6940 | ||
351f65ca L |
6941 | #undef ELF_OSABI |
6942 | ||
351f65ca L |
6943 | #undef elf_backend_object_p |
6944 | #define elf_backend_object_p \ | |
6945 | elf32_x86_64_elf_object_p | |
6946 | ||
6947 | #undef elf_backend_bfd_from_remote_memory | |
6948 | #define elf_backend_bfd_from_remote_memory \ | |
6949 | _bfd_elf32_bfd_from_remote_memory | |
6950 | ||
6951 | #undef elf_backend_size_info | |
6952 | #define elf_backend_size_info \ | |
6953 | _bfd_elf32_size_info | |
6954 | ||
6955 | #include "elf32-target.h" |