Commit | Line | Data |
---|---|---|
351f65ca | 1 | /* X86-64 specific support for ELF |
2571583a | 2 | Copyright (C) 2000-2017 Free Software Foundation, Inc. |
8d88c4ca NC |
3 | Contributed by Jan Hubicka <jh@suse.cz>. |
4 | ||
ae9a127f | 5 | This file is part of BFD, the Binary File Descriptor library. |
8d88c4ca | 6 | |
ae9a127f NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
ae9a127f | 10 | (at your option) any later version. |
8d88c4ca | 11 | |
ae9a127f NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
8d88c4ca | 16 | |
ae9a127f NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
8d88c4ca | 21 | |
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 | { | |
695344c0 | 288 | /* xgettext:c-format */ |
4eca0228 AM |
289 | _bfd_error_handler (_("%B: invalid relocation type %d"), |
290 | abfd, (int) r_type); | |
67a4f2b7 AO |
291 | r_type = R_X86_64_NONE; |
292 | } | |
293 | i = r_type; | |
294 | } | |
295 | else | |
296 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
297 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
298 | return &x86_64_elf_howto_table[i]; | |
299 | } | |
8d88c4ca NC |
300 | |
301 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
302 | static reloc_howto_type * | |
351f65ca L |
303 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
304 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
305 | { |
306 | unsigned int i; | |
27482721 | 307 | |
8d88c4ca NC |
308 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
309 | i++) | |
310 | { | |
311 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
312 | return elf_x86_64_rtype_to_howto (abfd, |
313 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca | 314 | } |
5860e3f8 | 315 | return NULL; |
8d88c4ca NC |
316 | } |
317 | ||
157090f7 | 318 | static reloc_howto_type * |
d7921315 | 319 | elf_x86_64_reloc_name_lookup (bfd *abfd, |
351f65ca | 320 | const char *r_name) |
157090f7 AM |
321 | { |
322 | unsigned int i; | |
323 | ||
d7921315 L |
324 | if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0) |
325 | { | |
326 | /* Get x32 R_X86_64_32. */ | |
327 | reloc_howto_type *reloc | |
328 | = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1]; | |
329 | BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32); | |
330 | return reloc; | |
331 | } | |
332 | ||
333 | for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++) | |
157090f7 AM |
334 | if (x86_64_elf_howto_table[i].name != NULL |
335 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
336 | return &x86_64_elf_howto_table[i]; | |
337 | ||
338 | return NULL; | |
339 | } | |
340 | ||
8d88c4ca | 341 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 342 | |
8d88c4ca | 343 | static void |
351f65ca L |
344 | elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
345 | Elf_Internal_Rela *dst) | |
8d88c4ca | 346 | { |
67a4f2b7 | 347 | unsigned r_type; |
8d88c4ca | 348 | |
351f65ca L |
349 | r_type = ELF32_R_TYPE (dst->r_info); |
350 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); | |
8d88c4ca NC |
351 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
352 | } | |
70256ad8 | 353 | \f |
3bab7989 | 354 | /* Support for core dump NOTE sections. */ |
b34976b6 | 355 | static bfd_boolean |
351f65ca | 356 | elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
357 | { |
358 | int offset; | |
eea6121a | 359 | size_t size; |
3bab7989 ML |
360 | |
361 | switch (note->descsz) | |
362 | { | |
363 | default: | |
b34976b6 | 364 | return FALSE; |
3bab7989 | 365 | |
bcd823f1 L |
366 | case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */ |
367 | /* pr_cursig */ | |
228e534f | 368 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
bcd823f1 L |
369 | |
370 | /* pr_pid */ | |
228e534f | 371 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
bcd823f1 L |
372 | |
373 | /* pr_reg */ | |
374 | offset = 72; | |
375 | size = 216; | |
376 | ||
377 | break; | |
378 | ||
3bab7989 ML |
379 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ |
380 | /* pr_cursig */ | |
228e534f | 381 | elf_tdata (abfd)->core->signal |
3bab7989 ML |
382 | = bfd_get_16 (abfd, note->descdata + 12); |
383 | ||
384 | /* pr_pid */ | |
228e534f | 385 | elf_tdata (abfd)->core->lwpid |
3bab7989 ML |
386 | = bfd_get_32 (abfd, note->descdata + 32); |
387 | ||
388 | /* pr_reg */ | |
389 | offset = 112; | |
eea6121a | 390 | size = 216; |
3bab7989 ML |
391 | |
392 | break; | |
393 | } | |
394 | ||
395 | /* Make a ".reg/999" section. */ | |
396 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 397 | size, note->descpos + offset); |
3bab7989 ML |
398 | } |
399 | ||
b34976b6 | 400 | static bfd_boolean |
351f65ca | 401 | elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
402 | { |
403 | switch (note->descsz) | |
404 | { | |
405 | default: | |
b34976b6 | 406 | return FALSE; |
3bab7989 | 407 | |
bcd823f1 | 408 | case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */ |
228e534f | 409 | elf_tdata (abfd)->core->pid |
bcd823f1 | 410 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 411 | elf_tdata (abfd)->core->program |
bcd823f1 | 412 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 413 | elf_tdata (abfd)->core->command |
bcd823f1 L |
414 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
415 | break; | |
416 | ||
3bab7989 | 417 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ |
228e534f | 418 | elf_tdata (abfd)->core->pid |
261b8d08 | 419 | = bfd_get_32 (abfd, note->descdata + 24); |
228e534f | 420 | elf_tdata (abfd)->core->program |
3bab7989 | 421 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
228e534f | 422 | elf_tdata (abfd)->core->command |
3bab7989 ML |
423 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
424 | } | |
425 | ||
426 | /* Note that for some reason, a spurious space is tacked | |
427 | onto the end of the args in some (at least one anyway) | |
428 | implementations, so strip it off if it exists. */ | |
429 | ||
430 | { | |
228e534f | 431 | char *command = elf_tdata (abfd)->core->command; |
3bab7989 ML |
432 | int n = strlen (command); |
433 | ||
434 | if (0 < n && command[n - 1] == ' ') | |
435 | command[n - 1] = '\0'; | |
436 | } | |
437 | ||
b34976b6 | 438 | return TRUE; |
3bab7989 | 439 | } |
8fd79e71 L |
440 | |
441 | #ifdef CORE_HEADER | |
442 | static char * | |
443 | elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz, | |
444 | int note_type, ...) | |
445 | { | |
446 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8fd79e71 L |
447 | va_list ap; |
448 | const char *fname, *psargs; | |
449 | long pid; | |
450 | int cursig; | |
451 | const void *gregs; | |
452 | ||
453 | switch (note_type) | |
454 | { | |
455 | default: | |
456 | return NULL; | |
457 | ||
458 | case NT_PRPSINFO: | |
459 | va_start (ap, note_type); | |
460 | fname = va_arg (ap, const char *); | |
461 | psargs = va_arg (ap, const char *); | |
462 | va_end (ap); | |
463 | ||
464 | if (bed->s->elfclass == ELFCLASS32) | |
465 | { | |
466 | prpsinfo32_t data; | |
467 | memset (&data, 0, sizeof (data)); | |
468 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
469 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
470 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
471 | &data, sizeof (data)); | |
8fd79e71 L |
472 | } |
473 | else | |
474 | { | |
b1bd052d | 475 | prpsinfo64_t data; |
8fd79e71 L |
476 | memset (&data, 0, sizeof (data)); |
477 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
478 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
479 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
480 | &data, sizeof (data)); | |
8fd79e71 | 481 | } |
e85c6a70 | 482 | /* NOTREACHED */ |
8fd79e71 L |
483 | |
484 | case NT_PRSTATUS: | |
485 | va_start (ap, note_type); | |
486 | pid = va_arg (ap, long); | |
487 | cursig = va_arg (ap, int); | |
488 | gregs = va_arg (ap, const void *); | |
489 | va_end (ap); | |
490 | ||
491 | if (bed->s->elfclass == ELFCLASS32) | |
492 | { | |
493 | if (bed->elf_machine_code == EM_X86_64) | |
494 | { | |
495 | prstatusx32_t prstat; | |
496 | memset (&prstat, 0, sizeof (prstat)); | |
497 | prstat.pr_pid = pid; | |
498 | prstat.pr_cursig = cursig; | |
499 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
500 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
501 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
502 | } |
503 | else | |
504 | { | |
505 | prstatus32_t prstat; | |
506 | memset (&prstat, 0, sizeof (prstat)); | |
507 | prstat.pr_pid = pid; | |
508 | prstat.pr_cursig = cursig; | |
509 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
510 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
511 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
512 | } |
513 | } | |
514 | else | |
515 | { | |
b1bd052d | 516 | prstatus64_t prstat; |
8fd79e71 L |
517 | memset (&prstat, 0, sizeof (prstat)); |
518 | prstat.pr_pid = pid; | |
519 | prstat.pr_cursig = cursig; | |
520 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
521 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
522 | &prstat, sizeof (prstat)); | |
8fd79e71 | 523 | } |
8fd79e71 | 524 | } |
e85c6a70 | 525 | /* NOTREACHED */ |
8fd79e71 L |
526 | } |
527 | #endif | |
3bab7989 | 528 | \f |
407443a3 | 529 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 530 | |
407443a3 | 531 | /* The name of the dynamic interpreter. This is put in the .interp |
70256ad8 AJ |
532 | section. */ |
533 | ||
351f65ca | 534 | #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
eec9dd95 | 535 | #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1" |
70256ad8 | 536 | |
d40d037c AJ |
537 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
538 | copying dynamic variables from a shared lib into an app's dynbss | |
539 | section, and instead use a dynamic relocation to point into the | |
540 | shared lib. */ | |
541 | #define ELIMINATE_COPY_RELOCS 1 | |
542 | ||
70256ad8 AJ |
543 | /* The size in bytes of an entry in the global offset table. */ |
544 | ||
545 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 546 | |
38b12349 | 547 | /* The size in bytes of an entry in the lazy procedure linkage table. */ |
8d88c4ca | 548 | |
38b12349 | 549 | #define LAZY_PLT_ENTRY_SIZE 16 |
70256ad8 | 550 | |
38b12349 L |
551 | /* The size in bytes of an entry in the non-lazy procedure linkage |
552 | table. */ | |
70256ad8 | 553 | |
38b12349 L |
554 | #define NON_LAZY_PLT_ENTRY_SIZE 8 |
555 | ||
556 | /* The first entry in a lazy procedure linkage table looks like this. | |
557 | See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this | |
558 | works. */ | |
559 | ||
560 | static const bfd_byte elf_x86_64_lazy_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
70256ad8 | 561 | { |
653165cc AJ |
562 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
563 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 564 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
565 | }; |
566 | ||
38b12349 | 567 | /* Subsequent entries in a lazy procedure linkage table look like this. */ |
70256ad8 | 568 | |
38b12349 | 569 | static const bfd_byte elf_x86_64_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
70256ad8 | 570 | { |
653165cc | 571 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 572 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 573 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
574 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
575 | 0xe9, /* jmp relative */ | |
576 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
577 | }; | |
578 | ||
38b12349 | 579 | /* The first entry in a lazy procedure linkage table with BND prefix |
0ff2b86e L |
580 | like this. */ |
581 | ||
38b12349 | 582 | static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e L |
583 | { |
584 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
585 | 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */ | |
586 | 0x0f, 0x1f, 0 /* nopl (%rax) */ | |
587 | }; | |
588 | ||
38b12349 L |
589 | /* Subsequent entries for branches with BND prefx in a lazy procedure |
590 | linkage table look like this. */ | |
0ff2b86e | 591 | |
38b12349 | 592 | static const bfd_byte elf_x86_64_lazy_bnd_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e L |
593 | { |
594 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
595 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
596 | 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */ | |
597 | }; | |
598 | ||
38b12349 | 599 | /* Entries in the non-lazey procedure linkage table look like this. */ |
0ff2b86e | 600 | |
38b12349 | 601 | static const bfd_byte elf_x86_64_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 602 | { |
38b12349 L |
603 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
604 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
605 | 0x66, 0x90 /* xchg %ax,%ax */ | |
0ff2b86e L |
606 | }; |
607 | ||
38b12349 L |
608 | /* Entries for branches with BND prefix in the non-lazey procedure |
609 | linkage table look like this. */ | |
0ff2b86e | 610 | |
38b12349 | 611 | static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
0ff2b86e | 612 | { |
38b12349 L |
613 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ |
614 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
615 | 0x90 /* nop */ | |
0ff2b86e L |
616 | }; |
617 | ||
38b12349 | 618 | /* .eh_frame covering the lazy .plt section. */ |
e41b3a13 | 619 | |
38b12349 | 620 | static const bfd_byte elf_x86_64_eh_frame_lazy_plt[] = |
e41b3a13 JJ |
621 | { |
622 | #define PLT_CIE_LENGTH 20 | |
623 | #define PLT_FDE_LENGTH 36 | |
624 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
625 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
626 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
627 | 0, 0, 0, 0, /* CIE ID */ | |
628 | 1, /* CIE version */ | |
629 | 'z', 'R', 0, /* Augmentation string */ | |
630 | 1, /* Code alignment factor */ | |
631 | 0x78, /* Data alignment factor */ | |
632 | 16, /* Return address column */ | |
633 | 1, /* Augmentation size */ | |
634 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
635 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
636 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
637 | DW_CFA_nop, DW_CFA_nop, | |
638 | ||
639 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
640 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
641 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
642 | 0, 0, 0, 0, /* .plt size goes here */ | |
643 | 0, /* Augmentation size */ | |
644 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
645 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
646 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
647 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
648 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
649 | 11, /* Block length */ | |
650 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
651 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
652 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
653 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
654 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
655 | }; | |
656 | ||
38b12349 | 657 | /* .eh_frame covering the lazy BND .plt section. */ |
9e659176 | 658 | |
38b12349 | 659 | static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt[] = |
9e659176 L |
660 | { |
661 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
662 | 0, 0, 0, 0, /* CIE ID */ | |
663 | 1, /* CIE version */ | |
664 | 'z', 'R', 0, /* Augmentation string */ | |
665 | 1, /* Code alignment factor */ | |
666 | 0x78, /* Data alignment factor */ | |
667 | 16, /* Return address column */ | |
668 | 1, /* Augmentation size */ | |
669 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
670 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
671 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
672 | DW_CFA_nop, DW_CFA_nop, | |
673 | ||
674 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
675 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
676 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
677 | 0, 0, 0, 0, /* .plt size goes here */ | |
678 | 0, /* Augmentation size */ | |
679 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
680 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
681 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
682 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
683 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
684 | 11, /* Block length */ | |
685 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
686 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
687 | DW_OP_lit15, DW_OP_and, DW_OP_lit5, DW_OP_ge, | |
688 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
689 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
690 | }; | |
691 | ||
38b12349 | 692 | /* .eh_frame covering the non-lazy .plt section. */ |
fff53dae | 693 | |
38b12349 | 694 | static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt[] = |
fff53dae L |
695 | { |
696 | #define PLT_GOT_FDE_LENGTH 20 | |
697 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
698 | 0, 0, 0, 0, /* CIE ID */ | |
699 | 1, /* CIE version */ | |
700 | 'z', 'R', 0, /* Augmentation string */ | |
701 | 1, /* Code alignment factor */ | |
702 | 0x78, /* Data alignment factor */ | |
703 | 16, /* Return address column */ | |
704 | 1, /* Augmentation size */ | |
705 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
706 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
707 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
708 | DW_CFA_nop, DW_CFA_nop, | |
709 | ||
710 | PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
711 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
38b12349 L |
712 | 0, 0, 0, 0, /* the start of non-lazy .plt goes here */ |
713 | 0, 0, 0, 0, /* non-lazy .plt size goes here */ | |
fff53dae L |
714 | 0, /* Augmentation size */ |
715 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, | |
716 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
717 | }; | |
718 | ||
38b12349 | 719 | struct elf_x86_64_lazy_plt_layout |
eed180f8 RM |
720 | { |
721 | /* Templates for the initial PLT entry and for subsequent entries. */ | |
722 | const bfd_byte *plt0_entry; | |
723 | const bfd_byte *plt_entry; | |
724 | unsigned int plt_entry_size; /* Size of each PLT entry. */ | |
725 | ||
726 | /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */ | |
727 | unsigned int plt0_got1_offset; | |
728 | unsigned int plt0_got2_offset; | |
729 | ||
730 | /* Offset of the end of the PC-relative instruction containing | |
731 | plt0_got2_offset. */ | |
732 | unsigned int plt0_got2_insn_end; | |
733 | ||
734 | /* Offsets into plt_entry that are to be replaced with... */ | |
735 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
736 | unsigned int plt_reloc_offset; /* ... offset into relocation table. */ | |
737 | unsigned int plt_plt_offset; /* ... offset to start of .plt. */ | |
738 | ||
739 | /* Length of the PC-relative instruction containing plt_got_offset. */ | |
740 | unsigned int plt_got_insn_size; | |
741 | ||
742 | /* Offset of the end of the PC-relative jump to plt0_entry. */ | |
743 | unsigned int plt_plt_insn_end; | |
744 | ||
745 | /* Offset into plt_entry where the initial value of the GOT entry points. */ | |
746 | unsigned int plt_lazy_offset; | |
747 | ||
38b12349 L |
748 | /* .eh_frame covering the lazy .plt section. */ |
749 | const bfd_byte *eh_frame_plt; | |
750 | unsigned int eh_frame_plt_size; | |
751 | }; | |
752 | ||
753 | struct elf_x86_64_non_lazy_plt_layout | |
754 | { | |
755 | /* Template for the lazy PLT entries. */ | |
756 | const bfd_byte *plt_entry; | |
757 | unsigned int plt_entry_size; /* Size of each PLT entry. */ | |
758 | ||
759 | /* Offsets into plt_entry that are to be replaced with... */ | |
760 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
761 | ||
762 | /* Length of the PC-relative instruction containing plt_got_offset. */ | |
763 | unsigned int plt_got_insn_size; | |
764 | ||
765 | /* .eh_frame covering the non-lazy .plt section. */ | |
766 | const bfd_byte *eh_frame_plt; | |
767 | unsigned int eh_frame_plt_size; | |
768 | }; | |
769 | ||
770 | struct elf_x86_64_plt_layout | |
771 | { | |
772 | /* Template for the PLT entries. */ | |
773 | const bfd_byte *plt_entry; | |
774 | unsigned int plt_entry_size; /* Size of each PLT entry. */ | |
775 | ||
776 | /* 1 has PLT0. */ | |
777 | unsigned int has_plt0; | |
778 | ||
779 | /* Offsets into plt_entry that are to be replaced with... */ | |
780 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
781 | ||
782 | /* Length of the PC-relative instruction containing plt_got_offset. */ | |
783 | unsigned int plt_got_insn_size; | |
784 | ||
eed180f8 RM |
785 | /* .eh_frame covering the .plt section. */ |
786 | const bfd_byte *eh_frame_plt; | |
787 | unsigned int eh_frame_plt_size; | |
38b12349 | 788 | }; |
fff53dae | 789 | |
38b12349 L |
790 | /* Architecture-specific backend data for x86-64. */ |
791 | ||
792 | struct elf_x86_64_backend_data | |
793 | { | |
794 | /* Target system. */ | |
795 | enum | |
796 | { | |
797 | is_normal, | |
798 | is_nacl | |
799 | } os; | |
eed180f8 RM |
800 | }; |
801 | ||
f8222080 L |
802 | #define get_elf_x86_64_arch_data(bed) \ |
803 | ((const struct elf_x86_64_backend_data *) (bed)->arch_data) | |
804 | ||
eed180f8 | 805 | #define get_elf_x86_64_backend_data(abfd) \ |
f8222080 | 806 | get_elf_x86_64_arch_data (get_elf_backend_data (abfd)) |
eed180f8 | 807 | |
eed180f8 | 808 | /* These are the standard parameters. */ |
38b12349 | 809 | static const struct elf_x86_64_lazy_plt_layout elf_x86_64_lazy_plt = |
eed180f8 | 810 | { |
38b12349 L |
811 | elf_x86_64_lazy_plt0_entry, /* plt0_entry */ |
812 | elf_x86_64_lazy_plt_entry, /* plt_entry */ | |
813 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
eed180f8 RM |
814 | 2, /* plt0_got1_offset */ |
815 | 8, /* plt0_got2_offset */ | |
816 | 12, /* plt0_got2_insn_end */ | |
817 | 2, /* plt_got_offset */ | |
818 | 7, /* plt_reloc_offset */ | |
819 | 12, /* plt_plt_offset */ | |
820 | 6, /* plt_got_insn_size */ | |
38b12349 | 821 | LAZY_PLT_ENTRY_SIZE, /* plt_plt_insn_end */ |
eed180f8 | 822 | 6, /* plt_lazy_offset */ |
38b12349 L |
823 | elf_x86_64_eh_frame_lazy_plt, /* eh_frame_plt */ |
824 | sizeof (elf_x86_64_eh_frame_lazy_plt) /* eh_frame_plt_size */ | |
825 | }; | |
826 | ||
827 | static const struct elf_x86_64_non_lazy_plt_layout elf_x86_64_non_lazy_plt = | |
828 | { | |
829 | elf_x86_64_non_lazy_plt_entry, /* plt_entry */ | |
830 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
831 | 2, /* plt_got_offset */ | |
832 | 6, /* plt_got_insn_size */ | |
833 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
834 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
eed180f8 RM |
835 | }; |
836 | ||
38b12349 | 837 | static const struct elf_x86_64_lazy_plt_layout elf_x86_64_lazy_bnd_plt = |
0ff2b86e | 838 | { |
38b12349 L |
839 | elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */ |
840 | elf_x86_64_lazy_bnd_plt_entry, /* plt_entry */ | |
841 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
0ff2b86e L |
842 | 2, /* plt0_got1_offset */ |
843 | 1+8, /* plt0_got2_offset */ | |
844 | 1+12, /* plt0_got2_insn_end */ | |
845 | 1+2, /* plt_got_offset */ | |
846 | 1, /* plt_reloc_offset */ | |
847 | 7, /* plt_plt_offset */ | |
848 | 1+6, /* plt_got_insn_size */ | |
849 | 11, /* plt_plt_insn_end */ | |
850 | 0, /* plt_lazy_offset */ | |
38b12349 L |
851 | elf_x86_64_eh_frame_lazy_bnd_plt, /* eh_frame_plt */ |
852 | sizeof (elf_x86_64_eh_frame_lazy_bnd_plt) /* eh_frame_plt_size */ | |
853 | }; | |
854 | ||
855 | static const struct elf_x86_64_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt = | |
856 | { | |
857 | elf_x86_64_non_lazy_bnd_plt_entry, /* plt_entry */ | |
858 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
859 | 1+2, /* plt_got_offset */ | |
860 | 1+6, /* plt_got_insn_size */ | |
861 | elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
862 | sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
863 | }; | |
864 | ||
865 | static const struct elf_x86_64_backend_data elf_x86_64_arch_bed = | |
866 | { | |
867 | is_normal /* os */ | |
0ff2b86e L |
868 | }; |
869 | ||
eed180f8 RM |
870 | #define elf_backend_arch_data &elf_x86_64_arch_bed |
871 | ||
aec6b87e L |
872 | /* Is a undefined weak symbol which is resolved to 0. Reference to an |
873 | undefined weak symbol is resolved to 0 when building executable if | |
874 | it isn't dynamic and | |
875 | 1. Has non-GOT/non-PLT relocations in text section. Or | |
876 | 2. Has no GOT/PLT relocation. | |
877 | */ | |
e62b9723 | 878 | #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \ |
aec6b87e L |
879 | ((EH)->elf.root.type == bfd_link_hash_undefweak \ |
880 | && bfd_link_executable (INFO) \ | |
881 | && (elf_x86_64_hash_table (INFO)->interp == NULL \ | |
e62b9723 | 882 | || !(GOT_RELOC) \ |
aec6b87e L |
883 | || (EH)->has_non_got_reloc \ |
884 | || !(INFO)->dynamic_undefined_weak)) | |
885 | ||
70256ad8 AJ |
886 | /* x86-64 ELF linker hash entry. */ |
887 | ||
351f65ca | 888 | struct elf_x86_64_link_hash_entry |
70256ad8 | 889 | { |
c434dee6 | 890 | struct elf_link_hash_entry elf; |
70256ad8 | 891 | |
c434dee6 | 892 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 893 | struct elf_dyn_relocs *dyn_relocs; |
bffbf940 JJ |
894 | |
895 | #define GOT_UNKNOWN 0 | |
896 | #define GOT_NORMAL 1 | |
897 | #define GOT_TLS_GD 2 | |
898 | #define GOT_TLS_IE 3 | |
67a4f2b7 AO |
899 | #define GOT_TLS_GDESC 4 |
900 | #define GOT_TLS_GD_BOTH_P(type) \ | |
901 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
902 | #define GOT_TLS_GD_P(type) \ | |
903 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
904 | #define GOT_TLS_GDESC_P(type) \ | |
905 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
906 | #define GOT_TLS_GD_ANY_P(type) \ | |
907 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
bffbf940 | 908 | unsigned char tls_type; |
67a4f2b7 | 909 | |
bc696fd5 L |
910 | /* TRUE if a weak symbol with a real definition needs a copy reloc. |
911 | When there is a weak symbol with a real definition, the processor | |
912 | independent code will have arranged for us to see the real | |
913 | definition first. We need to copy the needs_copy bit from the | |
914 | real definition and check it when allowing copy reloc in PIE. */ | |
915 | unsigned int needs_copy : 1; | |
916 | ||
aec6b87e L |
917 | /* TRUE if symbol has GOT or PLT relocations. */ |
918 | unsigned int has_got_reloc : 1; | |
919 | ||
920 | /* TRUE if symbol has non-GOT/non-PLT relocations in text sections. */ | |
921 | unsigned int has_non_got_reloc : 1; | |
922 | ||
9e9821dd L |
923 | /* Don't call finish_dynamic_symbol on this symbol. */ |
924 | unsigned int no_finish_dynamic_symbol : 1; | |
925 | ||
e2cbcd91 L |
926 | /* 0: symbol isn't __tls_get_addr. |
927 | 1: symbol is __tls_get_addr. | |
928 | 2: symbol is unknown. */ | |
929 | unsigned int tls_get_addr : 2; | |
930 | ||
04ebc307 L |
931 | /* Reference count of C/C++ function pointer relocations in read-write |
932 | section which can be resolved at run-time. */ | |
933 | bfd_signed_vma func_pointer_refcount; | |
934 | ||
dd7e64d4 L |
935 | /* Information about the GOT PLT entry. Filled when there are both |
936 | GOT and PLT relocations against the same function. */ | |
937 | union gotplt_union plt_got; | |
938 | ||
f2c29a16 L |
939 | /* Information about the second PLT entry. */ |
940 | union gotplt_union plt_second; | |
0ff2b86e | 941 | |
67a4f2b7 AO |
942 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, |
943 | starting at the end of the jump table. */ | |
944 | bfd_vma tlsdesc_got; | |
bffbf940 JJ |
945 | }; |
946 | ||
351f65ca L |
947 | #define elf_x86_64_hash_entry(ent) \ |
948 | ((struct elf_x86_64_link_hash_entry *)(ent)) | |
bffbf940 | 949 | |
351f65ca | 950 | struct elf_x86_64_obj_tdata |
bffbf940 JJ |
951 | { |
952 | struct elf_obj_tdata root; | |
953 | ||
954 | /* tls_type for each local got entry. */ | |
955 | char *local_got_tls_type; | |
67a4f2b7 AO |
956 | |
957 | /* GOTPLT entries for TLS descriptors. */ | |
958 | bfd_vma *local_tlsdesc_gotent; | |
70256ad8 AJ |
959 | }; |
960 | ||
351f65ca L |
961 | #define elf_x86_64_tdata(abfd) \ |
962 | ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any) | |
bffbf940 | 963 | |
351f65ca L |
964 | #define elf_x86_64_local_got_tls_type(abfd) \ |
965 | (elf_x86_64_tdata (abfd)->local_got_tls_type) | |
bffbf940 | 966 | |
351f65ca L |
967 | #define elf_x86_64_local_tlsdesc_gotent(abfd) \ |
968 | (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent) | |
bffbf940 | 969 | |
0ffa91dd NC |
970 | #define is_x86_64_elf(bfd) \ |
971 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
972 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 973 | && elf_object_id (bfd) == X86_64_ELF_DATA) |
0ffa91dd NC |
974 | |
975 | static bfd_boolean | |
351f65ca | 976 | elf_x86_64_mkobject (bfd *abfd) |
0ffa91dd | 977 | { |
351f65ca | 978 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata), |
4dfe6ac6 | 979 | X86_64_ELF_DATA); |
0ffa91dd NC |
980 | } |
981 | ||
c434dee6 | 982 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 983 | |
351f65ca | 984 | struct elf_x86_64_link_hash_table |
407443a3 | 985 | { |
c434dee6 | 986 | struct elf_link_hash_table elf; |
70256ad8 | 987 | |
c434dee6 | 988 | /* Short-cuts to get to dynamic linker sections. */ |
aec6b87e | 989 | asection *interp; |
e41b3a13 | 990 | asection *plt_eh_frame; |
f2c29a16 L |
991 | asection *plt_second; |
992 | asection *plt_second_eh_frame; | |
dd7e64d4 | 993 | asection *plt_got; |
fff53dae | 994 | asection *plt_got_eh_frame; |
70256ad8 | 995 | |
38b12349 L |
996 | /* Parameters describing PLT generation, lazy or non-lazy. */ |
997 | struct elf_x86_64_plt_layout plt; | |
998 | ||
999 | /* Parameters describing lazy PLT generation. */ | |
1000 | const struct elf_x86_64_lazy_plt_layout *lazy_plt; | |
1001 | ||
1002 | /* Parameters describing non-lazy PLT generation. */ | |
1003 | const struct elf_x86_64_non_lazy_plt_layout *non_lazy_plt; | |
1004 | ||
4dfe6ac6 NC |
1005 | union |
1006 | { | |
bffbf940 JJ |
1007 | bfd_signed_vma refcount; |
1008 | bfd_vma offset; | |
1009 | } tls_ld_got; | |
1010 | ||
67a4f2b7 AO |
1011 | /* The amount of space used by the jump slots in the GOT. */ |
1012 | bfd_vma sgotplt_jump_table_size; | |
1013 | ||
87d72d41 AM |
1014 | /* Small local sym cache. */ |
1015 | struct sym_cache sym_cache; | |
9f03412a | 1016 | |
351f65ca L |
1017 | bfd_vma (*r_info) (bfd_vma, bfd_vma); |
1018 | bfd_vma (*r_sym) (bfd_vma); | |
248775ba | 1019 | unsigned int pointer_r_type; |
351f65ca L |
1020 | const char *dynamic_interpreter; |
1021 | int dynamic_interpreter_size; | |
1022 | ||
9f03412a AO |
1023 | /* _TLS_MODULE_BASE_ symbol. */ |
1024 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
1025 | |
1026 | /* Used by local STT_GNU_IFUNC symbols. */ | |
1027 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
1028 | void * loc_hash_memory; |
1029 | ||
1030 | /* The offset into splt of the PLT entry for the TLS descriptor | |
1031 | resolver. Special values are 0, if not necessary (or not found | |
1032 | to be necessary yet), and -1 if needed but not determined | |
1033 | yet. */ | |
1034 | bfd_vma tlsdesc_plt; | |
1035 | /* The offset into sgot of the GOT entry used by the PLT entry | |
1036 | above. */ | |
1037 | bfd_vma tlsdesc_got; | |
e1f98742 L |
1038 | |
1039 | /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */ | |
1040 | bfd_vma next_jump_slot_index; | |
1041 | /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */ | |
1042 | bfd_vma next_irelative_index; | |
2df3368d L |
1043 | |
1044 | /* TRUE if there are dynamic relocs against IFUNC symbols that apply | |
1045 | to read-only sections. */ | |
1046 | bfd_boolean readonly_dynrelocs_against_ifunc; | |
c434dee6 | 1047 | }; |
70256ad8 AJ |
1048 | |
1049 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca | 1050 | |
351f65ca | 1051 | #define elf_x86_64_hash_table(p) \ |
4dfe6ac6 | 1052 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
351f65ca | 1053 | == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL) |
8d88c4ca | 1054 | |
351f65ca | 1055 | #define elf_x86_64_compute_jump_table_size(htab) \ |
6de2ae4a | 1056 | ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE) |
67a4f2b7 | 1057 | |
407443a3 | 1058 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
1059 | |
1060 | static struct bfd_hash_entry * | |
351f65ca L |
1061 | elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry, |
1062 | struct bfd_hash_table *table, | |
1063 | const char *string) | |
70256ad8 | 1064 | { |
70256ad8 | 1065 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
1066 | subclass. */ |
1067 | if (entry == NULL) | |
1068 | { | |
a50b1753 | 1069 | entry = (struct bfd_hash_entry *) |
eed180f8 RM |
1070 | bfd_hash_allocate (table, |
1071 | sizeof (struct elf_x86_64_link_hash_entry)); | |
c434dee6 AJ |
1072 | if (entry == NULL) |
1073 | return entry; | |
1074 | } | |
70256ad8 AJ |
1075 | |
1076 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
1077 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
1078 | if (entry != NULL) | |
70256ad8 | 1079 | { |
351f65ca | 1080 | struct elf_x86_64_link_hash_entry *eh; |
c434dee6 | 1081 | |
351f65ca | 1082 | eh = (struct elf_x86_64_link_hash_entry *) entry; |
c434dee6 | 1083 | eh->dyn_relocs = NULL; |
bffbf940 | 1084 | eh->tls_type = GOT_UNKNOWN; |
bc696fd5 | 1085 | eh->needs_copy = 0; |
aec6b87e L |
1086 | eh->has_got_reloc = 0; |
1087 | eh->has_non_got_reloc = 0; | |
9e9821dd | 1088 | eh->no_finish_dynamic_symbol = 0; |
e2cbcd91 | 1089 | eh->tls_get_addr = 2; |
04ebc307 | 1090 | eh->func_pointer_refcount = 0; |
f2c29a16 | 1091 | eh->plt_second.offset = (bfd_vma) -1; |
dd7e64d4 | 1092 | eh->plt_got.offset = (bfd_vma) -1; |
67a4f2b7 | 1093 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
1094 | } |
1095 | ||
c434dee6 | 1096 | return entry; |
70256ad8 AJ |
1097 | } |
1098 | ||
c25bc9fc L |
1099 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
1100 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
1101 | as global symbol. We reuse indx and dynstr_index for local symbol | |
1102 | hash since they aren't used by global symbols in this backend. */ | |
1103 | ||
1104 | static hashval_t | |
351f65ca | 1105 | elf_x86_64_local_htab_hash (const void *ptr) |
c25bc9fc L |
1106 | { |
1107 | struct elf_link_hash_entry *h | |
1108 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 1109 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
1110 | } |
1111 | ||
1112 | /* Compare local hash entries. */ | |
1113 | ||
1114 | static int | |
351f65ca | 1115 | elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2) |
c25bc9fc L |
1116 | { |
1117 | struct elf_link_hash_entry *h1 | |
1118 | = (struct elf_link_hash_entry *) ptr1; | |
1119 | struct elf_link_hash_entry *h2 | |
1120 | = (struct elf_link_hash_entry *) ptr2; | |
1121 | ||
1122 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
1123 | } | |
1124 | ||
1125 | /* Find and/or create a hash entry for local symbol. */ | |
1126 | ||
1127 | static struct elf_link_hash_entry * | |
351f65ca L |
1128 | elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab, |
1129 | bfd *abfd, const Elf_Internal_Rela *rel, | |
1130 | bfd_boolean create) | |
c25bc9fc | 1131 | { |
351f65ca | 1132 | struct elf_x86_64_link_hash_entry e, *ret; |
c25bc9fc | 1133 | asection *sec = abfd->sections; |
d2149d72 | 1134 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
351f65ca | 1135 | htab->r_sym (rel->r_info)); |
c25bc9fc L |
1136 | void **slot; |
1137 | ||
1138 | e.elf.indx = sec->id; | |
351f65ca | 1139 | e.elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc L |
1140 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, |
1141 | create ? INSERT : NO_INSERT); | |
1142 | ||
1143 | if (!slot) | |
1144 | return NULL; | |
1145 | ||
1146 | if (*slot) | |
1147 | { | |
351f65ca | 1148 | ret = (struct elf_x86_64_link_hash_entry *) *slot; |
c25bc9fc L |
1149 | return &ret->elf; |
1150 | } | |
1151 | ||
351f65ca | 1152 | ret = (struct elf_x86_64_link_hash_entry *) |
c25bc9fc | 1153 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, |
351f65ca | 1154 | sizeof (struct elf_x86_64_link_hash_entry)); |
c25bc9fc L |
1155 | if (ret) |
1156 | { | |
1157 | memset (ret, 0, sizeof (*ret)); | |
1158 | ret->elf.indx = sec->id; | |
351f65ca | 1159 | ret->elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc | 1160 | ret->elf.dynindx = -1; |
04ebc307 | 1161 | ret->func_pointer_refcount = 0; |
dd7e64d4 | 1162 | ret->plt_got.offset = (bfd_vma) -1; |
c25bc9fc L |
1163 | *slot = ret; |
1164 | } | |
1165 | return &ret->elf; | |
1166 | } | |
1167 | ||
68faa637 AM |
1168 | /* Destroy an X86-64 ELF linker hash table. */ |
1169 | ||
1170 | static void | |
d495ab0d | 1171 | elf_x86_64_link_hash_table_free (bfd *obfd) |
68faa637 AM |
1172 | { |
1173 | struct elf_x86_64_link_hash_table *htab | |
d495ab0d | 1174 | = (struct elf_x86_64_link_hash_table *) obfd->link.hash; |
68faa637 AM |
1175 | |
1176 | if (htab->loc_hash_table) | |
1177 | htab_delete (htab->loc_hash_table); | |
1178 | if (htab->loc_hash_memory) | |
1179 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
d495ab0d | 1180 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
1181 | } |
1182 | ||
8d88c4ca NC |
1183 | /* Create an X86-64 ELF linker hash table. */ |
1184 | ||
1185 | static struct bfd_link_hash_table * | |
351f65ca | 1186 | elf_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca | 1187 | { |
351f65ca L |
1188 | struct elf_x86_64_link_hash_table *ret; |
1189 | bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table); | |
8d88c4ca | 1190 | |
7bf52ea2 | 1191 | ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt); |
c434dee6 | 1192 | if (ret == NULL) |
8d88c4ca NC |
1193 | return NULL; |
1194 | ||
eb4ff4d6 | 1195 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
351f65ca L |
1196 | elf_x86_64_link_hash_newfunc, |
1197 | sizeof (struct elf_x86_64_link_hash_entry), | |
4dfe6ac6 | 1198 | X86_64_ELF_DATA)) |
8d88c4ca | 1199 | { |
e2d34d7d | 1200 | free (ret); |
8d88c4ca NC |
1201 | return NULL; |
1202 | } | |
1203 | ||
351f65ca L |
1204 | if (ABI_64_P (abfd)) |
1205 | { | |
1206 | ret->r_info = elf64_r_info; | |
1207 | ret->r_sym = elf64_r_sym; | |
248775ba | 1208 | ret->pointer_r_type = R_X86_64_64; |
351f65ca L |
1209 | ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; |
1210 | ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; | |
1211 | } | |
1212 | else | |
1213 | { | |
1214 | ret->r_info = elf32_r_info; | |
1215 | ret->r_sym = elf32_r_sym; | |
248775ba | 1216 | ret->pointer_r_type = R_X86_64_32; |
351f65ca L |
1217 | ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; |
1218 | ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER; | |
1219 | } | |
1220 | ||
c25bc9fc | 1221 | ret->loc_hash_table = htab_try_create (1024, |
351f65ca L |
1222 | elf_x86_64_local_htab_hash, |
1223 | elf_x86_64_local_htab_eq, | |
c25bc9fc L |
1224 | NULL); |
1225 | ret->loc_hash_memory = objalloc_create (); | |
1226 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
1227 | { | |
d495ab0d | 1228 | elf_x86_64_link_hash_table_free (abfd); |
c25bc9fc L |
1229 | return NULL; |
1230 | } | |
d495ab0d | 1231 | ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free; |
c25bc9fc | 1232 | |
c434dee6 AJ |
1233 | return &ret->elf.root; |
1234 | } | |
1235 | ||
c434dee6 AJ |
1236 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
1237 | ||
1238 | static void | |
351f65ca L |
1239 | elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
1240 | struct elf_link_hash_entry *dir, | |
1241 | struct elf_link_hash_entry *ind) | |
c434dee6 | 1242 | { |
351f65ca | 1243 | struct elf_x86_64_link_hash_entry *edir, *eind; |
c434dee6 | 1244 | |
351f65ca L |
1245 | edir = (struct elf_x86_64_link_hash_entry *) dir; |
1246 | eind = (struct elf_x86_64_link_hash_entry *) ind; | |
c434dee6 | 1247 | |
e81830c5 AM |
1248 | edir->has_got_reloc |= eind->has_got_reloc; |
1249 | edir->has_non_got_reloc |= eind->has_non_got_reloc; | |
aec6b87e | 1250 | |
c434dee6 AJ |
1251 | if (eind->dyn_relocs != NULL) |
1252 | { | |
1253 | if (edir->dyn_relocs != NULL) | |
1254 | { | |
e03a8ed8 L |
1255 | struct elf_dyn_relocs **pp; |
1256 | struct elf_dyn_relocs *p; | |
c434dee6 | 1257 | |
fcfa13d2 | 1258 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
1259 | list. Merge any entries against the same section. */ |
1260 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1261 | { | |
e03a8ed8 | 1262 | struct elf_dyn_relocs *q; |
c434dee6 AJ |
1263 | |
1264 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1265 | if (q->sec == p->sec) | |
1266 | { | |
1267 | q->pc_count += p->pc_count; | |
1268 | q->count += p->count; | |
1269 | *pp = p->next; | |
1270 | break; | |
1271 | } | |
1272 | if (q == NULL) | |
1273 | pp = &p->next; | |
1274 | } | |
1275 | *pp = edir->dyn_relocs; | |
1276 | } | |
1277 | ||
1278 | edir->dyn_relocs = eind->dyn_relocs; | |
1279 | eind->dyn_relocs = NULL; | |
1280 | } | |
1281 | ||
bffbf940 JJ |
1282 | if (ind->root.type == bfd_link_hash_indirect |
1283 | && dir->got.refcount <= 0) | |
1284 | { | |
1285 | edir->tls_type = eind->tls_type; | |
1286 | eind->tls_type = GOT_UNKNOWN; | |
1287 | } | |
1288 | ||
d40d037c AJ |
1289 | if (ELIMINATE_COPY_RELOCS |
1290 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1291 | && dir->dynamic_adjusted) |
1292 | { | |
1293 | /* If called to transfer flags for a weakdef during processing | |
1294 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1295 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
e81830c5 AM |
1296 | if (dir->versioned != versioned_hidden) |
1297 | dir->ref_dynamic |= ind->ref_dynamic; | |
f5385ebf AM |
1298 | dir->ref_regular |= ind->ref_regular; |
1299 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1300 | dir->needs_plt |= ind->needs_plt; | |
1301 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1302 | } | |
d40d037c | 1303 | else |
04ebc307 L |
1304 | { |
1305 | if (eind->func_pointer_refcount > 0) | |
1306 | { | |
1307 | edir->func_pointer_refcount += eind->func_pointer_refcount; | |
1308 | eind->func_pointer_refcount = 0; | |
1309 | } | |
1310 | ||
1311 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
1312 | } | |
8d88c4ca NC |
1313 | } |
1314 | ||
b34976b6 | 1315 | static bfd_boolean |
27482721 | 1316 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 1317 | { |
8d88c4ca NC |
1318 | /* Set the right machine number for an x86-64 elf64 file. */ |
1319 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 1320 | return TRUE; |
8d88c4ca NC |
1321 | } |
1322 | ||
8059fb19 RM |
1323 | static bfd_boolean |
1324 | elf32_x86_64_elf_object_p (bfd *abfd) | |
1325 | { | |
1326 | /* Set the right machine number for an x86-64 elf32 file. */ | |
1327 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
1328 | return TRUE; | |
1329 | } | |
1330 | ||
142411ca L |
1331 | /* Return TRUE if the TLS access code sequence support transition |
1332 | from R_TYPE. */ | |
1333 | ||
1334 | static bfd_boolean | |
351f65ca L |
1335 | elf_x86_64_check_tls_transition (bfd *abfd, |
1336 | struct bfd_link_info *info, | |
1337 | asection *sec, | |
1338 | bfd_byte *contents, | |
1339 | Elf_Internal_Shdr *symtab_hdr, | |
1340 | struct elf_link_hash_entry **sym_hashes, | |
1341 | unsigned int r_type, | |
1342 | const Elf_Internal_Rela *rel, | |
1343 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1344 | { |
142411ca L |
1345 | unsigned int val; |
1346 | unsigned long r_symndx; | |
5c98a14e | 1347 | bfd_boolean largepic = FALSE; |
142411ca L |
1348 | struct elf_link_hash_entry *h; |
1349 | bfd_vma offset; | |
351f65ca | 1350 | struct elf_x86_64_link_hash_table *htab; |
e2cbcd91 L |
1351 | bfd_byte *call; |
1352 | bfd_boolean indirect_call, tls_get_addr; | |
142411ca | 1353 | |
351f65ca | 1354 | htab = elf_x86_64_hash_table (info); |
142411ca | 1355 | offset = rel->r_offset; |
bffbf940 | 1356 | switch (r_type) |
142411ca L |
1357 | { |
1358 | case R_X86_64_TLSGD: | |
1359 | case R_X86_64_TLSLD: | |
1360 | if ((rel + 1) >= relend) | |
1361 | return FALSE; | |
1362 | ||
1363 | if (r_type == R_X86_64_TLSGD) | |
1364 | { | |
52bc799a | 1365 | /* Check transition from GD access model. For 64bit, only |
142411ca | 1366 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
e2cbcd91 L |
1367 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1368 | or | |
1369 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
1370 | .byte 0x66; rex64 | |
1371 | call *__tls_get_addr@GOTPCREL(%rip) | |
1372 | which may be converted to | |
1373 | addr32 call __tls_get_addr | |
52bc799a L |
1374 | can transit to different access model. For 32bit, only |
1375 | leaq foo@tlsgd(%rip), %rdi | |
e2cbcd91 L |
1376 | .word 0x6666; rex64; call __tls_get_addr@PLT |
1377 | or | |
1378 | leaq foo@tlsgd(%rip), %rdi | |
1379 | .byte 0x66; rex64 | |
1380 | call *__tls_get_addr@GOTPCREL(%rip) | |
1381 | which may be converted to | |
1382 | addr32 call __tls_get_addr | |
1383 | can transit to different access model. For largepic, | |
5c98a14e | 1384 | we also support: |
e2cbcd91 L |
1385 | leaq foo@tlsgd(%rip), %rdi |
1386 | movabsq $__tls_get_addr@pltoff, %rax | |
1387 | addq $r15, %rax | |
1388 | call *%rax | |
1389 | or | |
5c98a14e JJ |
1390 | leaq foo@tlsgd(%rip), %rdi |
1391 | movabsq $__tls_get_addr@pltoff, %rax | |
1392 | addq $rbx, %rax | |
e2cbcd91 | 1393 | call *%rax */ |
142411ca | 1394 | |
fa289a5f AM |
1395 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; |
1396 | ||
5c98a14e | 1397 | if ((offset + 12) > sec->size) |
142411ca | 1398 | return FALSE; |
52bc799a | 1399 | |
e2cbcd91 L |
1400 | call = contents + offset + 4; |
1401 | if (call[0] != 0x66 | |
1402 | || !((call[1] == 0x48 | |
1403 | && call[2] == 0xff | |
1404 | && call[3] == 0x15) | |
1405 | || (call[1] == 0x48 | |
1406 | && call[2] == 0x67 | |
1407 | && call[3] == 0xe8) | |
1408 | || (call[1] == 0x66 | |
1409 | && call[2] == 0x48 | |
1410 | && call[3] == 0xe8))) | |
5c98a14e JJ |
1411 | { |
1412 | if (!ABI_64_P (abfd) | |
1413 | || (offset + 19) > sec->size | |
1414 | || offset < 3 | |
e2cbcd91 L |
1415 | || memcmp (call - 7, leaq + 1, 3) != 0 |
1416 | || memcmp (call, "\x48\xb8", 2) != 0 | |
1417 | || call[11] != 0x01 | |
1418 | || call[13] != 0xff | |
1419 | || call[14] != 0xd0 | |
1420 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1421 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1422 | return FALSE; |
1423 | largepic = TRUE; | |
1424 | } | |
1425 | else if (ABI_64_P (abfd)) | |
52bc799a | 1426 | { |
52bc799a | 1427 | if (offset < 4 |
fa289a5f | 1428 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1429 | return FALSE; |
1430 | } | |
1431 | else | |
1432 | { | |
52bc799a | 1433 | if (offset < 3 |
fa289a5f | 1434 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1435 | return FALSE; |
1436 | } | |
e2cbcd91 | 1437 | indirect_call = call[2] == 0xff; |
142411ca L |
1438 | } |
1439 | else | |
1440 | { | |
1441 | /* Check transition from LD access model. Only | |
1442 | leaq foo@tlsld(%rip), %rdi; | |
e2cbcd91 L |
1443 | call __tls_get_addr@PLT |
1444 | or | |
1445 | leaq foo@tlsld(%rip), %rdi; | |
1446 | call *__tls_get_addr@GOTPCREL(%rip) | |
1447 | which may be converted to | |
1448 | addr32 call __tls_get_addr | |
5c98a14e JJ |
1449 | can transit to different access model. For largepic |
1450 | we also support: | |
e2cbcd91 L |
1451 | leaq foo@tlsld(%rip), %rdi |
1452 | movabsq $__tls_get_addr@pltoff, %rax | |
1453 | addq $r15, %rax | |
1454 | call *%rax | |
1455 | or | |
5c98a14e JJ |
1456 | leaq foo@tlsld(%rip), %rdi |
1457 | movabsq $__tls_get_addr@pltoff, %rax | |
1458 | addq $rbx, %rax | |
e2cbcd91 | 1459 | call *%rax */ |
142411ca | 1460 | |
fa289a5f | 1461 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1462 | |
1463 | if (offset < 3 || (offset + 9) > sec->size) | |
1464 | return FALSE; | |
1465 | ||
5c98a14e | 1466 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
142411ca | 1467 | return FALSE; |
5c98a14e | 1468 | |
e2cbcd91 L |
1469 | call = contents + offset + 4; |
1470 | if (!(call[0] == 0xe8 | |
1471 | || (call[0] == 0xff && call[1] == 0x15) | |
1472 | || (call[0] == 0x67 && call[1] == 0xe8))) | |
5c98a14e JJ |
1473 | { |
1474 | if (!ABI_64_P (abfd) | |
1475 | || (offset + 19) > sec->size | |
e2cbcd91 L |
1476 | || memcmp (call, "\x48\xb8", 2) != 0 |
1477 | || call[11] != 0x01 | |
1478 | || call[13] != 0xff | |
1479 | || call[14] != 0xd0 | |
1480 | || !((call[10] == 0x48 && call[12] == 0xd8) | |
1481 | || (call[10] == 0x4c && call[12] == 0xf8))) | |
5c98a14e JJ |
1482 | return FALSE; |
1483 | largepic = TRUE; | |
1484 | } | |
e2cbcd91 | 1485 | indirect_call = call[0] == 0xff; |
142411ca L |
1486 | } |
1487 | ||
351f65ca | 1488 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1489 | if (r_symndx < symtab_hdr->sh_info) |
1490 | return FALSE; | |
1491 | ||
e2cbcd91 | 1492 | tls_get_addr = FALSE; |
142411ca | 1493 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
e2cbcd91 L |
1494 | if (h != NULL && h->root.root.string != NULL) |
1495 | { | |
1496 | struct elf_x86_64_link_hash_entry *eh | |
1497 | = (struct elf_x86_64_link_hash_entry *) h; | |
1498 | tls_get_addr = eh->tls_get_addr == 1; | |
1499 | if (eh->tls_get_addr > 1) | |
1500 | { | |
1501 | /* Use strncmp to check __tls_get_addr since | |
1502 | __tls_get_addr may be versioned. */ | |
1503 | if (strncmp (h->root.root.string, "__tls_get_addr", 14) | |
1504 | == 0) | |
1505 | { | |
1506 | eh->tls_get_addr = 1; | |
1507 | tls_get_addr = TRUE; | |
1508 | } | |
1509 | else | |
1510 | eh->tls_get_addr = 0; | |
1511 | } | |
1512 | } | |
1513 | ||
1514 | if (!tls_get_addr) | |
1515 | return FALSE; | |
1516 | else if (largepic) | |
1517 | return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64; | |
1518 | else if (indirect_call) | |
1519 | return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_GOTPCRELX; | |
1520 | else | |
1521 | return (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32 | |
1522 | || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
142411ca L |
1523 | |
1524 | case R_X86_64_GOTTPOFF: | |
1525 | /* Check transition from IE access model: | |
4a4c5f25 L |
1526 | mov foo@gottpoff(%rip), %reg |
1527 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1528 | */ |
1529 | ||
4a4c5f25 L |
1530 | /* Check REX prefix first. */ |
1531 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1532 | { | |
1533 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1534 | if (val != 0x48 && val != 0x4c) | |
1535 | { | |
1536 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1537 | if (ABI_64_P (abfd)) | |
1538 | return FALSE; | |
1539 | } | |
1540 | } | |
1541 | else | |
1542 | { | |
1543 | /* X32 may not have any REX prefix. */ | |
1544 | if (ABI_64_P (abfd)) | |
1545 | return FALSE; | |
1546 | if (offset < 2 || (offset + 3) > sec->size) | |
1547 | return FALSE; | |
1548 | } | |
142411ca L |
1549 | |
1550 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1551 | if (val != 0x8b && val != 0x03) | |
1552 | return FALSE; | |
1553 | ||
1554 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1555 | return (val & 0xc7) == 5; | |
1556 | ||
1557 | case R_X86_64_GOTPC32_TLSDESC: | |
1558 | /* Check transition from GDesc access model: | |
1559 | leaq x@tlsdesc(%rip), %rax | |
1560 | ||
1561 | Make sure it's a leaq adding rip to a 32-bit offset | |
1562 | into any register, although it's probably almost always | |
1563 | going to be rax. */ | |
1564 | ||
1565 | if (offset < 3 || (offset + 4) > sec->size) | |
1566 | return FALSE; | |
1567 | ||
1568 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1569 | if ((val & 0xfb) != 0x48) | |
1570 | return FALSE; | |
1571 | ||
1572 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1573 | return FALSE; | |
1574 | ||
1575 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1576 | return (val & 0xc7) == 0x05; | |
1577 | ||
1578 | case R_X86_64_TLSDESC_CALL: | |
1579 | /* Check transition from GDesc access model: | |
1580 | call *x@tlsdesc(%rax) | |
1581 | */ | |
1582 | if (offset + 2 <= sec->size) | |
1583 | { | |
1584 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
e2cbcd91 L |
1585 | call = contents + offset; |
1586 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1587 | } |
1588 | ||
1589 | return FALSE; | |
1590 | ||
1591 | default: | |
1592 | abort (); | |
1593 | } | |
1594 | } | |
1595 | ||
1596 | /* Return TRUE if the TLS access transition is OK or no transition | |
1597 | will be performed. Update R_TYPE if there is a transition. */ | |
1598 | ||
1599 | static bfd_boolean | |
351f65ca L |
1600 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1601 | asection *sec, bfd_byte *contents, | |
1602 | Elf_Internal_Shdr *symtab_hdr, | |
1603 | struct elf_link_hash_entry **sym_hashes, | |
1604 | unsigned int *r_type, int tls_type, | |
1605 | const Elf_Internal_Rela *rel, | |
1606 | const Elf_Internal_Rela *relend, | |
1607 | struct elf_link_hash_entry *h, | |
bedfd056 L |
1608 | unsigned long r_symndx, |
1609 | bfd_boolean from_relocate_section) | |
142411ca L |
1610 | { |
1611 | unsigned int from_type = *r_type; | |
1612 | unsigned int to_type = from_type; | |
1613 | bfd_boolean check = TRUE; | |
1614 | ||
bb1cb422 L |
1615 | /* Skip TLS transition for functions. */ |
1616 | if (h != NULL | |
1617 | && (h->type == STT_FUNC | |
1618 | || h->type == STT_GNU_IFUNC)) | |
1619 | return TRUE; | |
1620 | ||
142411ca | 1621 | switch (from_type) |
bffbf940 JJ |
1622 | { |
1623 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1624 | case R_X86_64_GOTPC32_TLSDESC: |
1625 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1626 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1627 | if (bfd_link_executable (info)) |
142411ca L |
1628 | { |
1629 | if (h == NULL) | |
1630 | to_type = R_X86_64_TPOFF32; | |
1631 | else | |
1632 | to_type = R_X86_64_GOTTPOFF; | |
1633 | } | |
1634 | ||
bedfd056 L |
1635 | /* When we are called from elf_x86_64_relocate_section, there may |
1636 | be additional transitions based on TLS_TYPE. */ | |
1637 | if (from_relocate_section) | |
142411ca L |
1638 | { |
1639 | unsigned int new_to_type = to_type; | |
1640 | ||
0e1862bb | 1641 | if (bfd_link_executable (info) |
142411ca L |
1642 | && h != NULL |
1643 | && h->dynindx == -1 | |
1644 | && tls_type == GOT_TLS_IE) | |
1645 | new_to_type = R_X86_64_TPOFF32; | |
1646 | ||
1647 | if (to_type == R_X86_64_TLSGD | |
1648 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1649 | || to_type == R_X86_64_TLSDESC_CALL) | |
1650 | { | |
1651 | if (tls_type == GOT_TLS_IE) | |
1652 | new_to_type = R_X86_64_GOTTPOFF; | |
1653 | } | |
1654 | ||
1655 | /* We checked the transition before when we were called from | |
351f65ca | 1656 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1657 | transition which hasn't been checked before. */ |
1658 | check = new_to_type != to_type && from_type == to_type; | |
1659 | to_type = new_to_type; | |
1660 | } | |
1661 | ||
1662 | break; | |
1663 | ||
bffbf940 | 1664 | case R_X86_64_TLSLD: |
0e1862bb | 1665 | if (bfd_link_executable (info)) |
142411ca L |
1666 | to_type = R_X86_64_TPOFF32; |
1667 | break; | |
1668 | ||
1669 | default: | |
1670 | return TRUE; | |
bffbf940 JJ |
1671 | } |
1672 | ||
142411ca L |
1673 | /* Return TRUE if there is no transition. */ |
1674 | if (from_type == to_type) | |
1675 | return TRUE; | |
1676 | ||
1677 | /* Check if the transition can be performed. */ | |
1678 | if (check | |
351f65ca L |
1679 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1680 | symtab_hdr, sym_hashes, | |
1681 | from_type, rel, relend)) | |
142411ca | 1682 | { |
2f629d23 | 1683 | reloc_howto_type *from, *to; |
4c544807 | 1684 | const char *name; |
142411ca | 1685 | |
351f65ca L |
1686 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1687 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1688 | |
4c544807 L |
1689 | if (h) |
1690 | name = h->root.root.string; | |
1691 | else | |
1692 | { | |
351f65ca | 1693 | struct elf_x86_64_link_hash_table *htab; |
4dfe6ac6 | 1694 | |
351f65ca | 1695 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1696 | if (htab == NULL) |
1697 | name = "*unknown*"; | |
1698 | else | |
1699 | { | |
1700 | Elf_Internal_Sym *isym; | |
1701 | ||
1702 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1703 | abfd, r_symndx); | |
1704 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1705 | } | |
4c544807 L |
1706 | } |
1707 | ||
4eca0228 | 1708 | _bfd_error_handler |
695344c0 | 1709 | /* xgettext:c-format */ |
142411ca L |
1710 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " |
1711 | "in section `%A' failed"), | |
c08bb8dd AM |
1712 | abfd, from->name, to->name, name, |
1713 | (unsigned long) rel->r_offset, sec); | |
142411ca L |
1714 | bfd_set_error (bfd_error_bad_value); |
1715 | return FALSE; | |
1716 | } | |
1717 | ||
1718 | *r_type = to_type; | |
1719 | return TRUE; | |
bffbf940 JJ |
1720 | } |
1721 | ||
c1d11331 L |
1722 | /* Rename some of the generic section flags to better document how they |
1723 | are used here. */ | |
338c190a L |
1724 | #define need_convert_load sec_flg0 |
1725 | #define check_relocs_failed sec_flg1 | |
1726 | ||
1727 | static bfd_boolean | |
1728 | elf_x86_64_need_pic (bfd *input_bfd, asection *sec, | |
1729 | struct elf_link_hash_entry *h, | |
1730 | Elf_Internal_Shdr *symtab_hdr, | |
1731 | Elf_Internal_Sym *isym, | |
1732 | reloc_howto_type *howto) | |
1733 | { | |
1734 | const char *v = ""; | |
1735 | const char *und = ""; | |
1736 | const char *pic = ""; | |
1737 | ||
1738 | const char *name; | |
1739 | if (h) | |
1740 | { | |
1741 | name = h->root.root.string; | |
1742 | switch (ELF_ST_VISIBILITY (h->other)) | |
1743 | { | |
1744 | case STV_HIDDEN: | |
1745 | v = _("hidden symbol "); | |
1746 | break; | |
1747 | case STV_INTERNAL: | |
1748 | v = _("internal symbol "); | |
1749 | break; | |
1750 | case STV_PROTECTED: | |
1751 | v = _("protected symbol "); | |
1752 | break; | |
1753 | default: | |
1754 | v = _("symbol "); | |
1755 | pic = _("; recompile with -fPIC"); | |
1756 | break; | |
1757 | } | |
1758 | ||
1759 | if (!h->def_regular && !h->def_dynamic) | |
1760 | und = _("undefined "); | |
1761 | } | |
1762 | else | |
1763 | { | |
1764 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL); | |
1765 | pic = _("; recompile with -fPIC"); | |
1766 | } | |
1767 | ||
695344c0 | 1768 | /* xgettext:c-format */ |
4eca0228 AM |
1769 | _bfd_error_handler (_("%B: relocation %s against %s%s`%s' can " |
1770 | "not be used when making a shared object%s"), | |
1771 | input_bfd, howto->name, und, v, name, pic); | |
338c190a L |
1772 | bfd_set_error (bfd_error_bad_value); |
1773 | sec->check_relocs_failed = 1; | |
1774 | return FALSE; | |
1775 | } | |
c1d11331 | 1776 | |
c175a657 L |
1777 | /* With the local symbol, foo, we convert |
1778 | mov foo@GOTPCREL(%rip), %reg | |
1779 | to | |
1780 | lea foo(%rip), %reg | |
1781 | and convert | |
1782 | call/jmp *foo@GOTPCREL(%rip) | |
1783 | to | |
1784 | nop call foo/jmp foo nop | |
1785 | When PIC is false, convert | |
1786 | test %reg, foo@GOTPCREL(%rip) | |
1787 | to | |
1788 | test $foo, %reg | |
1789 | and convert | |
1790 | binop foo@GOTPCREL(%rip), %reg | |
1791 | to | |
1792 | binop $foo, %reg | |
1793 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1794 | instructions. */ | |
1795 | ||
1796 | static bfd_boolean | |
1797 | elf_x86_64_convert_load_reloc (bfd *abfd, asection *sec, | |
1798 | bfd_byte *contents, | |
1799 | Elf_Internal_Rela *irel, | |
1800 | struct elf_link_hash_entry *h, | |
1801 | bfd_boolean *converted, | |
1802 | struct bfd_link_info *link_info) | |
1803 | { | |
1804 | struct elf_x86_64_link_hash_table *htab; | |
1805 | bfd_boolean is_pic; | |
1806 | bfd_boolean require_reloc_pc32; | |
1807 | bfd_boolean relocx; | |
1808 | bfd_boolean to_reloc_pc32; | |
1809 | asection *tsec; | |
1810 | char symtype; | |
1811 | bfd_signed_vma raddend; | |
1812 | unsigned int opcode; | |
1813 | unsigned int modrm; | |
1814 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
1815 | unsigned int r_symndx; | |
1816 | bfd_vma toff; | |
1817 | bfd_vma roff = irel->r_offset; | |
1818 | ||
1819 | if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2)) | |
1820 | return TRUE; | |
1821 | ||
1822 | raddend = irel->r_addend; | |
1823 | /* Addend for 32-bit PC-relative relocation must be -4. */ | |
1824 | if (raddend != -4) | |
1825 | return TRUE; | |
1826 | ||
1827 | htab = elf_x86_64_hash_table (link_info); | |
1828 | is_pic = bfd_link_pic (link_info); | |
1829 | ||
1830 | relocx = (r_type == R_X86_64_GOTPCRELX | |
1831 | || r_type == R_X86_64_REX_GOTPCRELX); | |
1832 | ||
1833 | /* TRUE if we can convert only to R_X86_64_PC32. Enable it for | |
1834 | --no-relax. */ | |
1835 | require_reloc_pc32 | |
1836 | = link_info->disable_target_specific_optimizations > 1; | |
1837 | ||
1838 | r_symndx = htab->r_sym (irel->r_info); | |
1839 | ||
1840 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1841 | ||
1842 | /* Convert mov to lea since it has been done for a while. */ | |
1843 | if (opcode != 0x8b) | |
1844 | { | |
1845 | /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX | |
1846 | for call, jmp or one of adc, add, and, cmp, or, sbb, sub, | |
1847 | test, xor instructions. */ | |
1848 | if (!relocx) | |
1849 | return TRUE; | |
1850 | } | |
1851 | ||
1852 | /* We convert only to R_X86_64_PC32: | |
1853 | 1. Branch. | |
1854 | 2. R_X86_64_GOTPCREL since we can't modify REX byte. | |
1855 | 3. require_reloc_pc32 is true. | |
1856 | 4. PIC. | |
1857 | */ | |
1858 | to_reloc_pc32 = (opcode == 0xff | |
1859 | || !relocx | |
1860 | || require_reloc_pc32 | |
1861 | || is_pic); | |
1862 | ||
1863 | /* Get the symbol referred to by the reloc. */ | |
1864 | if (h == NULL) | |
1865 | { | |
1866 | Elf_Internal_Sym *isym | |
1867 | = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx); | |
1868 | ||
1869 | /* Skip relocation against undefined symbols. */ | |
1870 | if (isym->st_shndx == SHN_UNDEF) | |
1871 | return TRUE; | |
1872 | ||
1873 | symtype = ELF_ST_TYPE (isym->st_info); | |
1874 | ||
1875 | if (isym->st_shndx == SHN_ABS) | |
1876 | tsec = bfd_abs_section_ptr; | |
1877 | else if (isym->st_shndx == SHN_COMMON) | |
1878 | tsec = bfd_com_section_ptr; | |
1879 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
1880 | tsec = &_bfd_elf_large_com_section; | |
1881 | else | |
1882 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1883 | ||
1884 | toff = isym->st_value; | |
1885 | } | |
1886 | else | |
1887 | { | |
1888 | /* Undefined weak symbol is only bound locally in executable | |
1889 | and its reference is resolved as 0 without relocation | |
1890 | overflow. We can only perform this optimization for | |
1891 | GOTPCRELX relocations since we need to modify REX byte. | |
1892 | It is OK convert mov with R_X86_64_GOTPCREL to | |
1893 | R_X86_64_PC32. */ | |
1894 | if ((relocx || opcode == 0x8b) | |
1895 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, | |
1896 | TRUE, | |
1897 | elf_x86_64_hash_entry (h))) | |
1898 | { | |
1899 | if (opcode == 0xff) | |
1900 | { | |
1901 | /* Skip for branch instructions since R_X86_64_PC32 | |
1902 | may overflow. */ | |
1903 | if (require_reloc_pc32) | |
1904 | return TRUE; | |
1905 | } | |
1906 | else if (relocx) | |
1907 | { | |
1908 | /* For non-branch instructions, we can convert to | |
1909 | R_X86_64_32/R_X86_64_32S since we know if there | |
1910 | is a REX byte. */ | |
1911 | to_reloc_pc32 = FALSE; | |
1912 | } | |
1913 | ||
1914 | /* Since we don't know the current PC when PIC is true, | |
1915 | we can't convert to R_X86_64_PC32. */ | |
1916 | if (to_reloc_pc32 && is_pic) | |
1917 | return TRUE; | |
1918 | ||
1919 | goto convert; | |
1920 | } | |
1921 | /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since | |
1922 | ld.so may use its link-time address. */ | |
1923 | else if ((h->def_regular | |
1924 | || h->root.type == bfd_link_hash_defined | |
1925 | || h->root.type == bfd_link_hash_defweak) | |
1926 | && h != htab->elf.hdynamic | |
1927 | && SYMBOL_REFERENCES_LOCAL (link_info, h)) | |
1928 | { | |
1929 | /* bfd_link_hash_new or bfd_link_hash_undefined is | |
1930 | set by an assignment in a linker script in | |
1931 | bfd_elf_record_link_assignment. */ | |
1932 | if (h->def_regular | |
1933 | && (h->root.type == bfd_link_hash_new | |
f02cb058 AM |
1934 | || h->root.type == bfd_link_hash_undefined |
1935 | || ((h->root.type == bfd_link_hash_defined | |
1936 | || h->root.type == bfd_link_hash_defweak) | |
1937 | && h->root.u.def.section == bfd_und_section_ptr))) | |
c175a657 L |
1938 | { |
1939 | /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */ | |
1940 | if (require_reloc_pc32) | |
1941 | return TRUE; | |
1942 | goto convert; | |
1943 | } | |
1944 | tsec = h->root.u.def.section; | |
1945 | toff = h->root.u.def.value; | |
1946 | symtype = h->type; | |
1947 | } | |
1948 | else | |
1949 | return TRUE; | |
1950 | } | |
1951 | ||
2168b268 L |
1952 | /* Don't convert GOTPCREL relocation against large section. */ |
1953 | if (elf_section_data (tsec) != NULL | |
1954 | && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0) | |
1955 | return TRUE; | |
1956 | ||
c175a657 L |
1957 | /* We can only estimate relocation overflow for R_X86_64_PC32. */ |
1958 | if (!to_reloc_pc32) | |
1959 | goto convert; | |
1960 | ||
1961 | if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE) | |
1962 | { | |
1963 | /* At this stage in linking, no SEC_MERGE symbol has been | |
1964 | adjusted, so all references to such symbols need to be | |
1965 | passed through _bfd_merged_section_offset. (Later, in | |
1966 | relocate_section, all SEC_MERGE symbols *except* for | |
1967 | section symbols have been adjusted.) | |
1968 | ||
1969 | gas may reduce relocations against symbols in SEC_MERGE | |
1970 | sections to a relocation against the section symbol when | |
1971 | the original addend was zero. When the reloc is against | |
1972 | a section symbol we should include the addend in the | |
1973 | offset passed to _bfd_merged_section_offset, since the | |
1974 | location of interest is the original symbol. On the | |
1975 | other hand, an access to "sym+addend" where "sym" is not | |
1976 | a section symbol should not include the addend; Such an | |
1977 | access is presumed to be an offset from "sym"; The | |
1978 | location of interest is just "sym". */ | |
1979 | if (symtype == STT_SECTION) | |
1980 | toff += raddend; | |
1981 | ||
1982 | toff = _bfd_merged_section_offset (abfd, &tsec, | |
1983 | elf_section_data (tsec)->sec_info, | |
1984 | toff); | |
1985 | ||
1986 | if (symtype != STT_SECTION) | |
1987 | toff += raddend; | |
1988 | } | |
1989 | else | |
1990 | toff += raddend; | |
1991 | ||
1992 | /* Don't convert if R_X86_64_PC32 relocation overflows. */ | |
1993 | if (tsec->output_section == sec->output_section) | |
1994 | { | |
1995 | if ((toff - roff + 0x80000000) > 0xffffffff) | |
1996 | return TRUE; | |
1997 | } | |
1998 | else | |
1999 | { | |
2000 | bfd_signed_vma distance; | |
2001 | ||
2002 | /* At this point, we don't know the load addresses of TSEC | |
2003 | section nor SEC section. We estimate the distrance between | |
2004 | SEC and TSEC. We store the estimated distances in the | |
2005 | compressed_size field of the output section, which is only | |
2006 | used to decompress the compressed input section. */ | |
2007 | if (sec->output_section->compressed_size == 0) | |
2008 | { | |
2009 | asection *asect; | |
2010 | bfd_size_type size = 0; | |
2011 | for (asect = link_info->output_bfd->sections; | |
2012 | asect != NULL; | |
2013 | asect = asect->next) | |
2014 | /* Skip debug sections since compressed_size is used to | |
2015 | compress debug sections. */ | |
2016 | if ((asect->flags & SEC_DEBUGGING) == 0) | |
2017 | { | |
2018 | asection *i; | |
2019 | for (i = asect->map_head.s; | |
2020 | i != NULL; | |
2021 | i = i->map_head.s) | |
2022 | { | |
2023 | size = align_power (size, i->alignment_power); | |
2024 | size += i->size; | |
2025 | } | |
2026 | asect->compressed_size = size; | |
2027 | } | |
2028 | } | |
2029 | ||
2030 | /* Don't convert GOTPCREL relocations if TSEC isn't placed | |
2031 | after SEC. */ | |
2032 | distance = (tsec->output_section->compressed_size | |
2033 | - sec->output_section->compressed_size); | |
2034 | if (distance < 0) | |
2035 | return TRUE; | |
2036 | ||
2037 | /* Take PT_GNU_RELRO segment into account by adding | |
2038 | maxpagesize. */ | |
2039 | if ((toff + distance + get_elf_backend_data (abfd)->maxpagesize | |
2040 | - roff + 0x80000000) > 0xffffffff) | |
2041 | return TRUE; | |
2042 | } | |
2043 | ||
2044 | convert: | |
2045 | if (opcode == 0xff) | |
2046 | { | |
2047 | /* We have "call/jmp *foo@GOTPCREL(%rip)". */ | |
2048 | unsigned int nop; | |
2049 | unsigned int disp; | |
2050 | bfd_vma nop_offset; | |
2051 | ||
2052 | /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to | |
2053 | R_X86_64_PC32. */ | |
2054 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
2055 | if (modrm == 0x25) | |
2056 | { | |
2057 | /* Convert to "jmp foo nop". */ | |
2058 | modrm = 0xe9; | |
2059 | nop = NOP_OPCODE; | |
2060 | nop_offset = irel->r_offset + 3; | |
2061 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
2062 | irel->r_offset -= 1; | |
2063 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
2064 | } | |
2065 | else | |
2066 | { | |
e2cbcd91 L |
2067 | struct elf_x86_64_link_hash_entry *eh |
2068 | = (struct elf_x86_64_link_hash_entry *) h; | |
2069 | ||
c175a657 L |
2070 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
2071 | is a nop prefix. */ | |
2072 | modrm = 0xe8; | |
e2cbcd91 L |
2073 | /* To support TLS optimization, always use addr32 prefix for |
2074 | "call *__tls_get_addr@GOTPCREL(%rip)". */ | |
2075 | if (eh && eh->tls_get_addr == 1) | |
c175a657 | 2076 | { |
e2cbcd91 L |
2077 | nop = 0x67; |
2078 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
2079 | } |
2080 | else | |
e2cbcd91 L |
2081 | { |
2082 | nop = link_info->call_nop_byte; | |
2083 | if (link_info->call_nop_as_suffix) | |
2084 | { | |
2085 | nop_offset = irel->r_offset + 3; | |
2086 | disp = bfd_get_32 (abfd, contents + irel->r_offset); | |
2087 | irel->r_offset -= 1; | |
2088 | bfd_put_32 (abfd, disp, contents + irel->r_offset); | |
2089 | } | |
2090 | else | |
2091 | nop_offset = irel->r_offset - 2; | |
2092 | } | |
c175a657 L |
2093 | } |
2094 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
2095 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
2096 | r_type = R_X86_64_PC32; | |
2097 | } | |
2098 | else | |
2099 | { | |
2100 | unsigned int rex; | |
2101 | unsigned int rex_mask = REX_R; | |
2102 | ||
2103 | if (r_type == R_X86_64_REX_GOTPCRELX) | |
2104 | rex = bfd_get_8 (abfd, contents + roff - 3); | |
2105 | else | |
2106 | rex = 0; | |
2107 | ||
2108 | if (opcode == 0x8b) | |
2109 | { | |
2110 | if (to_reloc_pc32) | |
2111 | { | |
2112 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
2113 | "lea foo(%rip), %reg". */ | |
2114 | opcode = 0x8d; | |
2115 | r_type = R_X86_64_PC32; | |
2116 | } | |
2117 | else | |
2118 | { | |
2119 | /* Convert "mov foo@GOTPCREL(%rip), %reg" to | |
2120 | "mov $foo, %reg". */ | |
2121 | opcode = 0xc7; | |
2122 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
2123 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
2124 | if ((rex & REX_W) != 0 | |
2125 | && ABI_64_P (link_info->output_bfd)) | |
2126 | { | |
2127 | /* Keep the REX_W bit in REX byte for LP64. */ | |
2128 | r_type = R_X86_64_32S; | |
2129 | goto rewrite_modrm_rex; | |
2130 | } | |
2131 | else | |
2132 | { | |
2133 | /* If the REX_W bit in REX byte isn't needed, | |
2134 | use R_X86_64_32 and clear the W bit to avoid | |
2135 | sign-extend imm32 to imm64. */ | |
2136 | r_type = R_X86_64_32; | |
2137 | /* Clear the W bit in REX byte. */ | |
2138 | rex_mask |= REX_W; | |
2139 | goto rewrite_modrm_rex; | |
2140 | } | |
2141 | } | |
2142 | } | |
2143 | else | |
2144 | { | |
2145 | /* R_X86_64_PC32 isn't supported. */ | |
2146 | if (to_reloc_pc32) | |
2147 | return TRUE; | |
2148 | ||
2149 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
2150 | if (opcode == 0x85) | |
2151 | { | |
2152 | /* Convert "test %reg, foo@GOTPCREL(%rip)" to | |
2153 | "test $foo, %reg". */ | |
2154 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
2155 | opcode = 0xf7; | |
2156 | } | |
2157 | else | |
2158 | { | |
2159 | /* Convert "binop foo@GOTPCREL(%rip), %reg" to | |
2160 | "binop $foo, %reg". */ | |
2161 | modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c); | |
2162 | opcode = 0x81; | |
2163 | } | |
2164 | ||
2165 | /* Use R_X86_64_32 with 32-bit operand to avoid relocation | |
2166 | overflow when sign-extending imm32 to imm64. */ | |
2167 | r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32; | |
2168 | ||
2169 | rewrite_modrm_rex: | |
2170 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
2171 | ||
2172 | if (rex) | |
2173 | { | |
2174 | /* Move the R bit to the B bit in REX byte. */ | |
2175 | rex = (rex & ~rex_mask) | (rex & REX_R) >> 2; | |
2176 | bfd_put_8 (abfd, rex, contents + roff - 3); | |
2177 | } | |
2178 | ||
2179 | /* No addend for R_X86_64_32/R_X86_64_32S relocations. */ | |
2180 | irel->r_addend = 0; | |
2181 | } | |
2182 | ||
2183 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
2184 | } | |
2185 | ||
2186 | irel->r_info = htab->r_info (r_symndx, r_type); | |
2187 | ||
2188 | *converted = TRUE; | |
2189 | ||
2190 | return TRUE; | |
2191 | } | |
2192 | ||
70256ad8 | 2193 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
2194 | calculate needed space in the global offset table, procedure |
2195 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 2196 | |
b34976b6 | 2197 | static bfd_boolean |
351f65ca L |
2198 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
2199 | asection *sec, | |
2200 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 2201 | { |
351f65ca | 2202 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2203 | Elf_Internal_Shdr *symtab_hdr; |
2204 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
2205 | const Elf_Internal_Rela *rel; |
2206 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 2207 | asection *sreloc; |
bedfd056 | 2208 | bfd_byte *contents; |
70256ad8 | 2209 | |
0e1862bb | 2210 | if (bfd_link_relocatable (info)) |
b34976b6 | 2211 | return TRUE; |
70256ad8 | 2212 | |
081b1afe L |
2213 | /* Don't do anything special with non-loaded, non-alloced sections. |
2214 | In particular, any relocs in such sections should not affect GOT | |
2215 | and PLT reference counting (ie. we don't allow them to create GOT | |
2216 | or PLT entries), there's no possibility or desire to optimize TLS | |
2217 | relocs, and there's not much point in propagating relocs to shared | |
2218 | libs that the dynamic linker won't relocate. */ | |
2219 | if ((sec->flags & SEC_ALLOC) == 0) | |
2220 | return TRUE; | |
2221 | ||
0ffa91dd NC |
2222 | BFD_ASSERT (is_x86_64_elf (abfd)); |
2223 | ||
351f65ca | 2224 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 | 2225 | if (htab == NULL) |
afd9acee L |
2226 | { |
2227 | sec->check_relocs_failed = 1; | |
2228 | return FALSE; | |
2229 | } | |
4dfe6ac6 | 2230 | |
bedfd056 L |
2231 | /* Get the section contents. */ |
2232 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2233 | contents = elf_section_data (sec)->this_hdr.contents; | |
2234 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2235 | { | |
2236 | sec->check_relocs_failed = 1; | |
2237 | return FALSE; | |
2238 | } | |
2239 | ||
0ffa91dd | 2240 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 2241 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 2242 | |
c434dee6 | 2243 | sreloc = NULL; |
cbe950e9 | 2244 | |
70256ad8 AJ |
2245 | rel_end = relocs + sec->reloc_count; |
2246 | for (rel = relocs; rel < rel_end; rel++) | |
2247 | { | |
bffbf940 | 2248 | unsigned int r_type; |
70256ad8 AJ |
2249 | unsigned long r_symndx; |
2250 | struct elf_link_hash_entry *h; | |
aec6b87e | 2251 | struct elf_x86_64_link_hash_entry *eh; |
4c544807 L |
2252 | Elf_Internal_Sym *isym; |
2253 | const char *name; | |
06a6a421 | 2254 | bfd_boolean size_reloc; |
70256ad8 | 2255 | |
351f65ca L |
2256 | r_symndx = htab->r_sym (rel->r_info); |
2257 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
2258 | |
2259 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
2260 | { | |
695344c0 | 2261 | /* xgettext:c-format */ |
4eca0228 AM |
2262 | _bfd_error_handler (_("%B: bad symbol index: %d"), |
2263 | abfd, r_symndx); | |
afd9acee | 2264 | goto error_return; |
c434dee6 AJ |
2265 | } |
2266 | ||
70256ad8 | 2267 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
2268 | { |
2269 | /* A local symbol. */ | |
c2e61a4e L |
2270 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
2271 | abfd, r_symndx); | |
2272 | if (isym == NULL) | |
afd9acee | 2273 | goto error_return; |
c25bc9fc L |
2274 | |
2275 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 2276 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 2277 | { |
351f65ca L |
2278 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, |
2279 | TRUE); | |
c25bc9fc | 2280 | if (h == NULL) |
afd9acee | 2281 | goto error_return; |
6bbec505 | 2282 | |
c25bc9fc | 2283 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
2284 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
2285 | isym, NULL); | |
c25bc9fc L |
2286 | h->type = STT_GNU_IFUNC; |
2287 | h->def_regular = 1; | |
2288 | h->ref_regular = 1; | |
2289 | h->forced_local = 1; | |
2290 | h->root.type = bfd_link_hash_defined; | |
2291 | } | |
2292 | else | |
2293 | h = NULL; | |
2294 | } | |
70256ad8 | 2295 | else |
71cb9464 | 2296 | { |
4c544807 | 2297 | isym = NULL; |
71cb9464 L |
2298 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
2299 | while (h->root.type == bfd_link_hash_indirect | |
2300 | || h->root.type == bfd_link_hash_warning) | |
2301 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 2302 | } |
cbe950e9 | 2303 | |
d1534d16 L |
2304 | /* Check invalid x32 relocations. */ |
2305 | if (!ABI_64_P (abfd)) | |
2306 | switch (r_type) | |
2307 | { | |
2308 | default: | |
2309 | break; | |
2310 | ||
d1534d16 L |
2311 | case R_X86_64_DTPOFF64: |
2312 | case R_X86_64_TPOFF64: | |
2313 | case R_X86_64_PC64: | |
2314 | case R_X86_64_GOTOFF64: | |
2315 | case R_X86_64_GOT64: | |
2316 | case R_X86_64_GOTPCREL64: | |
2317 | case R_X86_64_GOTPC64: | |
2318 | case R_X86_64_GOTPLT64: | |
2319 | case R_X86_64_PLTOFF64: | |
2320 | { | |
2321 | if (h) | |
2322 | name = h->root.root.string; | |
2323 | else | |
2324 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
2325 | NULL); | |
4eca0228 | 2326 | _bfd_error_handler |
695344c0 | 2327 | /* xgettext:c-format */ |
d1534d16 L |
2328 | (_("%B: relocation %s against symbol `%s' isn't " |
2329 | "supported in x32 mode"), abfd, | |
2330 | x86_64_elf_howto_table[r_type].name, name); | |
2331 | bfd_set_error (bfd_error_bad_value); | |
afd9acee | 2332 | goto error_return; |
d1534d16 L |
2333 | } |
2334 | break; | |
2335 | } | |
2336 | ||
c25bc9fc L |
2337 | if (h != NULL) |
2338 | { | |
ad1e85de L |
2339 | /* It is referenced by a non-shared object. */ |
2340 | h->ref_regular = 1; | |
bc4e12de | 2341 | h->root.non_ir_ref_regular = 1; |
13a2df29 L |
2342 | |
2343 | if (h->type == STT_GNU_IFUNC) | |
2344 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
2345 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 2346 | } |
70256ad8 | 2347 | |
bedfd056 | 2348 | if (! elf_x86_64_tls_transition (info, abfd, sec, contents, |
351f65ca L |
2349 | symtab_hdr, sym_hashes, |
2350 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 2351 | rel, rel_end, h, r_symndx, FALSE)) |
afd9acee | 2352 | goto error_return; |
142411ca | 2353 | |
aec6b87e | 2354 | eh = (struct elf_x86_64_link_hash_entry *) h; |
bffbf940 | 2355 | switch (r_type) |
70256ad8 | 2356 | { |
bffbf940 JJ |
2357 | case R_X86_64_TLSLD: |
2358 | htab->tls_ld_got.refcount += 1; | |
2359 | goto create_got; | |
2360 | ||
2361 | case R_X86_64_TPOFF32: | |
0e1862bb | 2362 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
338c190a L |
2363 | return elf_x86_64_need_pic (abfd, sec, h, symtab_hdr, isym, |
2364 | &x86_64_elf_howto_table[r_type]); | |
aec6b87e L |
2365 | if (eh != NULL) |
2366 | eh->has_got_reloc = 1; | |
bffbf940 | 2367 | break; |
c434dee6 | 2368 | |
bffbf940 | 2369 | case R_X86_64_GOTTPOFF: |
0e1862bb | 2370 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
2371 | info->flags |= DF_STATIC_TLS; |
2372 | /* Fall through */ | |
70256ad8 | 2373 | |
bffbf940 JJ |
2374 | case R_X86_64_GOT32: |
2375 | case R_X86_64_GOTPCREL: | |
56ceb5b5 L |
2376 | case R_X86_64_GOTPCRELX: |
2377 | case R_X86_64_REX_GOTPCRELX: | |
bffbf940 | 2378 | case R_X86_64_TLSGD: |
7b81dfbb AJ |
2379 | case R_X86_64_GOT64: |
2380 | case R_X86_64_GOTPCREL64: | |
2381 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
2382 | case R_X86_64_GOTPC32_TLSDESC: |
2383 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
2384 | /* This symbol requires a global offset table entry. */ |
2385 | { | |
2386 | int tls_type, old_tls_type; | |
2387 | ||
2388 | switch (r_type) | |
2389 | { | |
2390 | default: tls_type = GOT_NORMAL; break; | |
2391 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
2392 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
2393 | case R_X86_64_GOTPC32_TLSDESC: |
2394 | case R_X86_64_TLSDESC_CALL: | |
2395 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
2396 | } |
2397 | ||
2398 | if (h != NULL) | |
2399 | { | |
2400 | h->got.refcount += 1; | |
aec6b87e | 2401 | old_tls_type = eh->tls_type; |
bffbf940 JJ |
2402 | } |
2403 | else | |
2404 | { | |
2405 | bfd_signed_vma *local_got_refcounts; | |
2406 | ||
2407 | /* This is a global offset table entry for a local symbol. */ | |
2408 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2409 | if (local_got_refcounts == NULL) | |
2410 | { | |
2411 | bfd_size_type size; | |
2412 | ||
2413 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
2414 | size *= sizeof (bfd_signed_vma) |
2415 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
2416 | local_got_refcounts = ((bfd_signed_vma *) |
2417 | bfd_zalloc (abfd, size)); | |
2418 | if (local_got_refcounts == NULL) | |
afd9acee | 2419 | goto error_return; |
bffbf940 | 2420 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
351f65ca | 2421 | elf_x86_64_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 2422 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
351f65ca | 2423 | elf_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 2424 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
2425 | } |
2426 | local_got_refcounts[r_symndx] += 1; | |
2427 | old_tls_type | |
351f65ca | 2428 | = elf_x86_64_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
2429 | } |
2430 | ||
2431 | /* If a TLS symbol is accessed using IE at least once, | |
2432 | there is no point to use dynamic model for it. */ | |
2433 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
2434 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
2435 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 2436 | { |
67a4f2b7 | 2437 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 2438 | tls_type = old_tls_type; |
67a4f2b7 AO |
2439 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2440 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2441 | tls_type |= old_tls_type; | |
bffbf940 JJ |
2442 | else |
2443 | { | |
09a24cbf | 2444 | if (h) |
4c544807 L |
2445 | name = h->root.root.string; |
2446 | else | |
2447 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
2448 | isym, NULL); | |
4eca0228 | 2449 | _bfd_error_handler |
695344c0 | 2450 | /* xgettext:c-format */ |
63a5468a AM |
2451 | (_("%B: '%s' accessed both as normal and" |
2452 | " thread local symbol"), | |
4c544807 | 2453 | abfd, name); |
68c4a57e | 2454 | bfd_set_error (bfd_error_bad_value); |
afd9acee | 2455 | goto error_return; |
bffbf940 JJ |
2456 | } |
2457 | } | |
2458 | ||
2459 | if (old_tls_type != tls_type) | |
2460 | { | |
aec6b87e L |
2461 | if (eh != NULL) |
2462 | eh->tls_type = tls_type; | |
bffbf940 | 2463 | else |
351f65ca | 2464 | elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
2465 | } |
2466 | } | |
c434dee6 AJ |
2467 | /* Fall through */ |
2468 | ||
d6ab8113 JB |
2469 | case R_X86_64_GOTOFF64: |
2470 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2471 | case R_X86_64_GOTPC64: |
bffbf940 | 2472 | create_got: |
aec6b87e L |
2473 | if (eh != NULL) |
2474 | eh->has_got_reloc = 1; | |
70256ad8 AJ |
2475 | break; |
2476 | ||
2477 | case R_X86_64_PLT32: | |
c3320543 | 2478 | case R_X86_64_PLT32_BND: |
70256ad8 | 2479 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
2480 | actually build the entry in adjust_dynamic_symbol, |
2481 | because this might be a case of linking PIC code which is | |
2482 | never referenced by a dynamic object, in which case we | |
2483 | don't need to generate a procedure linkage table entry | |
2484 | after all. */ | |
70256ad8 AJ |
2485 | |
2486 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 2487 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
2488 | if (h == NULL) |
2489 | continue; | |
2490 | ||
aec6b87e | 2491 | eh->has_got_reloc = 1; |
f5385ebf | 2492 | h->needs_plt = 1; |
51b64d56 | 2493 | h->plt.refcount += 1; |
70256ad8 AJ |
2494 | break; |
2495 | ||
7b81dfbb AJ |
2496 | case R_X86_64_PLTOFF64: |
2497 | /* This tries to form the 'address' of a function relative | |
2498 | to GOT. For global symbols we need a PLT entry. */ | |
2499 | if (h != NULL) | |
2500 | { | |
2501 | h->needs_plt = 1; | |
2502 | h->plt.refcount += 1; | |
2503 | } | |
2504 | goto create_got; | |
2505 | ||
6a3e1bae L |
2506 | case R_X86_64_SIZE32: |
2507 | case R_X86_64_SIZE64: | |
06a6a421 | 2508 | size_reloc = TRUE; |
6a3e1bae L |
2509 | goto do_size; |
2510 | ||
248775ba L |
2511 | case R_X86_64_32: |
2512 | if (!ABI_64_P (abfd)) | |
2513 | goto pointer; | |
1a0670f3 | 2514 | /* Fall through. */ |
cc78d0af AJ |
2515 | case R_X86_64_8: |
2516 | case R_X86_64_16: | |
70256ad8 | 2517 | case R_X86_64_32S: |
338c190a L |
2518 | /* Check relocation overflow as these relocs may lead to |
2519 | run-time relocation overflow. Don't error out for | |
1b71fb54 | 2520 | sections we don't care about, such as debug sections or |
338c190a | 2521 | when relocation overflow check is disabled. */ |
4c10bbaa | 2522 | if (!info->no_reloc_overflow_check |
338c190a L |
2523 | && (bfd_link_pic (info) |
2524 | || (bfd_link_executable (info) | |
2525 | && h != NULL | |
2526 | && !h->def_regular | |
2527 | && h->def_dynamic | |
081b1afe | 2528 | && (sec->flags & SEC_READONLY) == 0))) |
338c190a L |
2529 | return elf_x86_64_need_pic (abfd, sec, h, symtab_hdr, isym, |
2530 | &x86_64_elf_howto_table[r_type]); | |
1b71fb54 AJ |
2531 | /* Fall through. */ |
2532 | ||
c434dee6 AJ |
2533 | case R_X86_64_PC8: |
2534 | case R_X86_64_PC16: | |
70256ad8 | 2535 | case R_X86_64_PC32: |
c3320543 | 2536 | case R_X86_64_PC32_BND: |
d6ab8113 | 2537 | case R_X86_64_PC64: |
1b71fb54 | 2538 | case R_X86_64_64: |
248775ba | 2539 | pointer: |
aec6b87e L |
2540 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
2541 | eh->has_non_got_reloc = 1; | |
bf52d7c7 L |
2542 | /* We are called after all symbols have been resolved. Only |
2543 | relocation against STT_GNU_IFUNC symbol must go through | |
2544 | PLT. */ | |
d1ed1c7d L |
2545 | if (h != NULL |
2546 | && (bfd_link_executable (info) | |
bf52d7c7 | 2547 | || h->type == STT_GNU_IFUNC)) |
c434dee6 AJ |
2548 | { |
2549 | /* If this reloc is in a read-only section, we might | |
2550 | need a copy reloc. We can't check reliably at this | |
2551 | stage whether the section is read-only, as input | |
2552 | sections have not yet been mapped to output sections. | |
2553 | Tentatively set the flag for now, and correct in | |
2554 | adjust_dynamic_symbol. */ | |
f5385ebf | 2555 | h->non_got_ref = 1; |
c434dee6 | 2556 | |
233cc9c1 L |
2557 | /* We may need a .plt entry if the symbol is a function |
2558 | defined in a shared lib or is a STT_GNU_IFUNC function | |
2559 | referenced from the code or read-only section. */ | |
2560 | if (!h->def_regular | |
2561 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
2562 | h->plt.refcount += 1; | |
2563 | ||
5db4f0d3 L |
2564 | if (r_type == R_X86_64_PC32) |
2565 | { | |
2566 | /* Since something like ".long foo - ." may be used | |
2567 | as pointer, make sure that PLT is used if foo is | |
2568 | a function defined in a shared library. */ | |
2569 | if ((sec->flags & SEC_CODE) == 0) | |
2570 | h->pointer_equality_needed = 1; | |
2571 | } | |
2572 | else if (r_type != R_X86_64_PC32_BND | |
2573 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
2574 | { |
2575 | h->pointer_equality_needed = 1; | |
2576 | /* At run-time, R_X86_64_64 can be resolved for both | |
2577 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
2578 | can only be resolved for x32. */ | |
2579 | if ((sec->flags & SEC_READONLY) == 0 | |
2580 | && (r_type == R_X86_64_64 | |
2581 | || (!ABI_64_P (abfd) | |
2582 | && (r_type == R_X86_64_32 | |
2583 | || r_type == R_X86_64_32S)))) | |
aec6b87e | 2584 | eh->func_pointer_refcount += 1; |
04ebc307 | 2585 | } |
c434dee6 | 2586 | } |
70256ad8 | 2587 | |
06a6a421 | 2588 | size_reloc = FALSE; |
6a3e1bae | 2589 | do_size: |
70256ad8 AJ |
2590 | /* If we are creating a shared library, and this is a reloc |
2591 | against a global symbol, or a non PC relative reloc | |
2592 | against a local symbol, then we need to copy the reloc | |
2593 | into the shared library. However, if we are linking with | |
2594 | -Bsymbolic, we do not need to copy a reloc against a | |
2595 | global symbol which is defined in an object we are | |
407443a3 | 2596 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
2597 | this point we have not seen all the input files, so it is |
2598 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
2599 | later (it is never cleared). In case of a weak definition, |
2600 | DEF_REGULAR may be cleared later by a strong definition in | |
2601 | a shared library. We account for that possibility below by | |
2602 | storing information in the relocs_copied field of the hash | |
2603 | table entry. A similar situation occurs when creating | |
2604 | shared libraries and symbol visibility changes render the | |
31c0ebfe | 2605 | symbol local. |
c434dee6 AJ |
2606 | |
2607 | If on the other hand, we are creating an executable, we | |
2608 | may need to keep relocations for symbols satisfied by a | |
2609 | dynamic library if we manage to avoid copy relocs for the | |
233cc9c1 L |
2610 | symbol. |
2611 | ||
2612 | Generate dynamic pointer relocation against STT_GNU_IFUNC | |
2613 | symbol in the non-code section. */ | |
081b1afe L |
2614 | if ((bfd_link_pic (info) |
2615 | && (! IS_X86_64_PCREL_TYPE (r_type) | |
2616 | || (h != NULL | |
2617 | && (! (bfd_link_pie (info) | |
2618 | || SYMBOLIC_BIND (info, h)) | |
2619 | || h->root.type == bfd_link_hash_defweak | |
2620 | || !h->def_regular)))) | |
233cc9c1 L |
2621 | || (h != NULL |
2622 | && h->type == STT_GNU_IFUNC | |
2623 | && r_type == htab->pointer_r_type | |
2624 | && (sec->flags & SEC_CODE) == 0) | |
081b1afe L |
2625 | || (ELIMINATE_COPY_RELOCS |
2626 | && !bfd_link_pic (info) | |
2627 | && h != NULL | |
2628 | && (h->root.type == bfd_link_hash_defweak | |
2629 | || !h->def_regular))) | |
70256ad8 | 2630 | { |
e03a8ed8 L |
2631 | struct elf_dyn_relocs *p; |
2632 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2633 | |
2634 | /* We must copy these reloc types into the output file. | |
2635 | Create a reloc section in dynobj and make room for | |
2636 | this reloc. */ | |
70256ad8 AJ |
2637 | if (sreloc == NULL) |
2638 | { | |
83bac4b0 | 2639 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
2640 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
2641 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 2642 | |
70256ad8 | 2643 | if (sreloc == NULL) |
afd9acee | 2644 | goto error_return; |
70256ad8 AJ |
2645 | } |
2646 | ||
c434dee6 AJ |
2647 | /* If this is a global symbol, we count the number of |
2648 | relocations we need for this symbol. */ | |
2649 | if (h != NULL) | |
aec6b87e | 2650 | head = &eh->dyn_relocs; |
c434dee6 AJ |
2651 | else |
2652 | { | |
2653 | /* Track dynamic relocs needed for local syms too. | |
2654 | We really need local syms available to do this | |
2655 | easily. Oh well. */ | |
c434dee6 | 2656 | asection *s; |
87d72d41 | 2657 | void **vpp; |
87d72d41 AM |
2658 | |
2659 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2660 | abfd, r_symndx); | |
2661 | if (isym == NULL) | |
afd9acee | 2662 | goto error_return; |
87d72d41 AM |
2663 | |
2664 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2665 | if (s == NULL) |
87d72d41 | 2666 | s = sec; |
70256ad8 | 2667 | |
e81d3500 DD |
2668 | /* Beware of type punned pointers vs strict aliasing |
2669 | rules. */ | |
2670 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2671 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2672 | } |
70256ad8 | 2673 | |
c434dee6 AJ |
2674 | p = *head; |
2675 | if (p == NULL || p->sec != sec) | |
2676 | { | |
2677 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 2678 | |
e03a8ed8 | 2679 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2680 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2681 | if (p == NULL) |
afd9acee | 2682 | goto error_return; |
c434dee6 AJ |
2683 | p->next = *head; |
2684 | *head = p; | |
2685 | p->sec = sec; | |
2686 | p->count = 0; | |
2687 | p->pc_count = 0; | |
70256ad8 | 2688 | } |
c434dee6 AJ |
2689 | |
2690 | p->count += 1; | |
06a6a421 L |
2691 | /* Count size relocation as PC-relative relocation. */ |
2692 | if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc) | |
c434dee6 | 2693 | p->pc_count += 1; |
70256ad8 AJ |
2694 | } |
2695 | break; | |
fe4770f4 AJ |
2696 | |
2697 | /* This relocation describes the C++ object vtable hierarchy. | |
2698 | Reconstruct it for later use during GC. */ | |
2699 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2700 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
afd9acee | 2701 | goto error_return; |
fe4770f4 AJ |
2702 | break; |
2703 | ||
2704 | /* This relocation describes which C++ vtable entries are actually | |
2705 | used. Record for later use during GC. */ | |
2706 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
2707 | BFD_ASSERT (h != NULL); |
2708 | if (h != NULL | |
2709 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
afd9acee | 2710 | goto error_return; |
fe4770f4 | 2711 | break; |
c434dee6 AJ |
2712 | |
2713 | default: | |
2714 | break; | |
70256ad8 | 2715 | } |
dd7e64d4 | 2716 | |
56ceb5b5 L |
2717 | if ((r_type == R_X86_64_GOTPCREL |
2718 | || r_type == R_X86_64_GOTPCRELX | |
2719 | || r_type == R_X86_64_REX_GOTPCRELX) | |
c1d11331 | 2720 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
56ceb5b5 | 2721 | sec->need_convert_load = 1; |
70256ad8 AJ |
2722 | } |
2723 | ||
bedfd056 L |
2724 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2725 | { | |
2726 | if (!info->keep_memory) | |
2727 | free (contents); | |
2728 | else | |
2729 | { | |
2730 | /* Cache the section contents for elf_link_input_bfd. */ | |
2731 | elf_section_data (sec)->this_hdr.contents = contents; | |
2732 | } | |
2733 | } | |
2734 | ||
b34976b6 | 2735 | return TRUE; |
afd9acee L |
2736 | |
2737 | error_return: | |
bedfd056 L |
2738 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2739 | free (contents); | |
afd9acee L |
2740 | sec->check_relocs_failed = 1; |
2741 | return FALSE; | |
70256ad8 AJ |
2742 | } |
2743 | ||
2744 | /* Return the section that should be marked against GC for a given | |
407443a3 | 2745 | relocation. */ |
70256ad8 AJ |
2746 | |
2747 | static asection * | |
351f65ca L |
2748 | elf_x86_64_gc_mark_hook (asection *sec, |
2749 | struct bfd_link_info *info, | |
2750 | Elf_Internal_Rela *rel, | |
2751 | struct elf_link_hash_entry *h, | |
2752 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
2753 | { |
2754 | if (h != NULL) | |
351f65ca | 2755 | switch (ELF32_R_TYPE (rel->r_info)) |
07adf181 AM |
2756 | { |
2757 | case R_X86_64_GNU_VTINHERIT: | |
2758 | case R_X86_64_GNU_VTENTRY: | |
2759 | return NULL; | |
2760 | } | |
2761 | ||
2762 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
2763 | } |
2764 | ||
aec6b87e L |
2765 | /* Remove undefined weak symbol from the dynamic symbol table if it |
2766 | is resolved to 0. */ | |
2767 | ||
2768 | static bfd_boolean | |
2769 | elf_x86_64_fixup_symbol (struct bfd_link_info *info, | |
2770 | struct elf_link_hash_entry *h) | |
2771 | { | |
2772 | if (h->dynindx != -1 | |
2773 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, | |
e62b9723 | 2774 | elf_x86_64_hash_entry (h)->has_got_reloc, |
aec6b87e L |
2775 | elf_x86_64_hash_entry (h))) |
2776 | { | |
2777 | h->dynindx = -1; | |
2778 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
2779 | h->dynstr_index); | |
2780 | } | |
2781 | return TRUE; | |
2782 | } | |
2783 | ||
70256ad8 AJ |
2784 | /* Adjust a symbol defined by a dynamic object and referenced by a |
2785 | regular object. The current definition is in some section of the | |
2786 | dynamic object, but we're not including those sections. We have to | |
2787 | change the definition to something the rest of the link can | |
407443a3 | 2788 | understand. */ |
70256ad8 | 2789 | |
b34976b6 | 2790 | static bfd_boolean |
351f65ca L |
2791 | elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
2792 | struct elf_link_hash_entry *h) | |
70256ad8 | 2793 | { |
351f65ca | 2794 | struct elf_x86_64_link_hash_table *htab; |
5474d94f | 2795 | asection *s, *srel; |
5ca5bb35 L |
2796 | struct elf_x86_64_link_hash_entry *eh; |
2797 | struct elf_dyn_relocs *p; | |
70256ad8 | 2798 | |
cbe950e9 L |
2799 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2800 | if (h->type == STT_GNU_IFUNC) | |
2801 | { | |
73bcf233 L |
2802 | /* All local STT_GNU_IFUNC references must be treate as local |
2803 | calls via local PLT. */ | |
5ca5bb35 L |
2804 | if (h->ref_regular |
2805 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2806 | { | |
73bcf233 | 2807 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2808 | struct elf_dyn_relocs **pp; |
2809 | ||
2810 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2811 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2812 | { | |
2813 | pc_count += p->pc_count; | |
2814 | p->count -= p->pc_count; | |
2815 | p->pc_count = 0; | |
73bcf233 | 2816 | count += p->count; |
5ca5bb35 L |
2817 | if (p->count == 0) |
2818 | *pp = p->next; | |
2819 | else | |
2820 | pp = &p->next; | |
2821 | } | |
2822 | ||
73bcf233 | 2823 | if (pc_count || count) |
5ca5bb35 | 2824 | { |
5ca5bb35 | 2825 | h->non_got_ref = 1; |
233cc9c1 L |
2826 | if (pc_count) |
2827 | { | |
2828 | /* Increment PLT reference count only for PC-relative | |
2829 | references. */ | |
2830 | h->needs_plt = 1; | |
2831 | if (h->plt.refcount <= 0) | |
2832 | h->plt.refcount = 1; | |
2833 | else | |
2834 | h->plt.refcount += 1; | |
2835 | } | |
5ca5bb35 L |
2836 | } |
2837 | } | |
2838 | ||
cbe950e9 L |
2839 | if (h->plt.refcount <= 0) |
2840 | { | |
2841 | h->plt.offset = (bfd_vma) -1; | |
2842 | h->needs_plt = 0; | |
2843 | } | |
2844 | return TRUE; | |
2845 | } | |
2846 | ||
70256ad8 AJ |
2847 | /* If this is a function, put it in the procedure linkage table. We |
2848 | will fill in the contents of the procedure linkage table later, | |
2849 | when we know the address of the .got section. */ | |
2850 | if (h->type == STT_FUNC | |
f5385ebf | 2851 | || h->needs_plt) |
70256ad8 | 2852 | { |
c434dee6 | 2853 | if (h->plt.refcount <= 0 |
27482721 AJ |
2854 | || SYMBOL_CALLS_LOCAL (info, h) |
2855 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2856 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 2857 | { |
70256ad8 AJ |
2858 | /* This case can occur if we saw a PLT32 reloc in an input |
2859 | file, but the symbol was never referred to by a dynamic | |
2860 | object, or if all references were garbage collected. In | |
2861 | such a case, we don't actually need to build a procedure | |
2862 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 2863 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2864 | h->needs_plt = 0; |
70256ad8 AJ |
2865 | } |
2866 | ||
b34976b6 | 2867 | return TRUE; |
70256ad8 | 2868 | } |
bbd7ec4a | 2869 | else |
c434dee6 AJ |
2870 | /* It's possible that we incorrectly decided a .plt reloc was |
2871 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
2872 | check_relocs. We can't decide accurately between function and | |
2873 | non-function syms in check-relocs; Objects loaded later in | |
2874 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2875 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
2876 | |
2877 | /* If this is a weak symbol, and there is a real definition, the | |
2878 | processor independent code will have arranged for us to see the | |
407443a3 | 2879 | real definition first, and we can just use the same value. */ |
f6e332e6 | 2880 | if (h->u.weakdef != NULL) |
70256ad8 | 2881 | { |
f6e332e6 AM |
2882 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2883 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2884 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2885 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 2886 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
bc696fd5 L |
2887 | { |
2888 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2889 | h->non_got_ref = h->u.weakdef->non_got_ref; | |
2890 | eh->needs_copy = h->u.weakdef->needs_copy; | |
2891 | } | |
b34976b6 | 2892 | return TRUE; |
70256ad8 AJ |
2893 | } |
2894 | ||
2895 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 2896 | is not a function. */ |
70256ad8 AJ |
2897 | |
2898 | /* If we are creating a shared library, we must presume that the | |
2899 | only references to the symbol are via the global offset table. | |
2900 | For such cases we need not do anything here; the relocations will | |
407443a3 | 2901 | be handled correctly by relocate_section. */ |
0e1862bb | 2902 | if (!bfd_link_executable (info)) |
b34976b6 | 2903 | return TRUE; |
70256ad8 AJ |
2904 | |
2905 | /* If there are no references to this symbol that do not use the | |
2906 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 2907 | if (!h->non_got_ref) |
b34976b6 | 2908 | return TRUE; |
70256ad8 | 2909 | |
c434dee6 AJ |
2910 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2911 | if (info->nocopyreloc) | |
2912 | { | |
f5385ebf | 2913 | h->non_got_ref = 0; |
b34976b6 | 2914 | return TRUE; |
c434dee6 AJ |
2915 | } |
2916 | ||
31c0ebfe | 2917 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 2918 | { |
351f65ca | 2919 | eh = (struct elf_x86_64_link_hash_entry *) h; |
d40d037c AJ |
2920 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2921 | { | |
2922 | s = p->sec->output_section; | |
2923 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2924 | break; | |
2925 | } | |
2926 | ||
2927 | /* If we didn't find any dynamic relocs in read-only sections, then | |
2928 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
2929 | if (p == NULL) | |
2930 | { | |
f5385ebf | 2931 | h->non_got_ref = 0; |
d40d037c AJ |
2932 | return TRUE; |
2933 | } | |
c434dee6 AJ |
2934 | } |
2935 | ||
70256ad8 | 2936 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 2937 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
2938 | an entry for this symbol in the .dynsym section. The dynamic |
2939 | object will contain position independent code, so all references | |
2940 | from the dynamic object to this symbol will go through the global | |
2941 | offset table. The dynamic linker will use the .dynsym entry to | |
2942 | determine the address it must put in the global offset table, so | |
2943 | both the dynamic object and the regular object will refer to the | |
2944 | same memory location for the variable. */ | |
2945 | ||
351f65ca | 2946 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2947 | if (htab == NULL) |
2948 | return FALSE; | |
70256ad8 AJ |
2949 | |
2950 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
2951 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 2952 | runtime process image. */ |
5474d94f AM |
2953 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
2954 | { | |
2955 | s = htab->elf.sdynrelro; | |
2956 | srel = htab->elf.sreldynrelro; | |
2957 | } | |
2958 | else | |
2959 | { | |
2960 | s = htab->elf.sdynbss; | |
2961 | srel = htab->elf.srelbss; | |
2962 | } | |
1d7e9d18 | 2963 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
70256ad8 | 2964 | { |
351f65ca L |
2965 | const struct elf_backend_data *bed; |
2966 | bed = get_elf_backend_data (info->output_bfd); | |
5474d94f | 2967 | srel->size += bed->s->sizeof_rela; |
f5385ebf | 2968 | h->needs_copy = 1; |
70256ad8 AJ |
2969 | } |
2970 | ||
6cabe1ea | 2971 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
70256ad8 AJ |
2972 | } |
2973 | ||
c434dee6 AJ |
2974 | /* Allocate space in .plt, .got and associated reloc sections for |
2975 | dynamic relocs. */ | |
2976 | ||
b34976b6 | 2977 | static bfd_boolean |
351f65ca | 2978 | elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
2979 | { |
2980 | struct bfd_link_info *info; | |
351f65ca L |
2981 | struct elf_x86_64_link_hash_table *htab; |
2982 | struct elf_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 2983 | struct elf_dyn_relocs *p; |
351f65ca | 2984 | const struct elf_backend_data *bed; |
eed180f8 | 2985 | unsigned int plt_entry_size; |
aec6b87e | 2986 | bfd_boolean resolved_to_zero; |
c434dee6 | 2987 | |
e92d460e | 2988 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2989 | return TRUE; |
c434dee6 | 2990 | |
351f65ca | 2991 | eh = (struct elf_x86_64_link_hash_entry *) h; |
e92d460e | 2992 | |
c434dee6 | 2993 | info = (struct bfd_link_info *) inf; |
351f65ca | 2994 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2995 | if (htab == NULL) |
2996 | return FALSE; | |
351f65ca | 2997 | bed = get_elf_backend_data (info->output_bfd); |
38b12349 | 2998 | plt_entry_size = htab->plt.plt_entry_size; |
c434dee6 | 2999 | |
e62b9723 L |
3000 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
3001 | eh->has_got_reloc, | |
3002 | eh); | |
aec6b87e | 3003 | |
dd7e64d4 L |
3004 | /* We can't use the GOT PLT if pointer equality is needed since |
3005 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
3006 | linker won't update the GOT slot. We will get into an infinite | |
3007 | loop at run-time. */ | |
3008 | if (htab->plt_got != NULL | |
3009 | && h->type != STT_GNU_IFUNC | |
3010 | && !h->pointer_equality_needed | |
3011 | && h->plt.refcount > 0 | |
3012 | && h->got.refcount > 0) | |
3013 | { | |
3014 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
3015 | reloctions. */ | |
3016 | h->plt.offset = (bfd_vma) -1; | |
3017 | ||
3018 | /* Use the GOT PLT. */ | |
3019 | eh->plt_got.refcount = 1; | |
3020 | } | |
3021 | ||
04ebc307 L |
3022 | /* Clear the reference count of function pointer relocations if |
3023 | symbol isn't a normal function. */ | |
3024 | if (h->type != STT_FUNC) | |
3025 | eh->func_pointer_refcount = 0; | |
3026 | ||
cbe950e9 L |
3027 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
3028 | here if it is defined and referenced in a non-shared object. */ | |
3029 | if (h->type == STT_GNU_IFUNC | |
3030 | && h->def_regular) | |
0ff2b86e L |
3031 | { |
3032 | if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, | |
3033 | &eh->dyn_relocs, | |
2df3368d | 3034 | &htab->readonly_dynrelocs_against_ifunc, |
0ff2b86e | 3035 | plt_entry_size, |
38b12349 L |
3036 | (htab->plt.has_plt0 |
3037 | * plt_entry_size), | |
233cc9c1 | 3038 | GOT_ENTRY_SIZE, TRUE)) |
0ff2b86e | 3039 | { |
f2c29a16 | 3040 | asection *s = htab->plt_second; |
0ff2b86e L |
3041 | if (h->plt.offset != (bfd_vma) -1 && s != NULL) |
3042 | { | |
f2c29a16 L |
3043 | /* Use the second PLT section if it is created. */ |
3044 | eh->plt_second.offset = s->size; | |
0ff2b86e | 3045 | |
f2c29a16 | 3046 | /* Make room for this entry in the second PLT section. */ |
38b12349 | 3047 | s->size += htab->non_lazy_plt->plt_entry_size; |
0ff2b86e L |
3048 | } |
3049 | ||
3050 | return TRUE; | |
3051 | } | |
3052 | else | |
3053 | return FALSE; | |
3054 | } | |
04ebc307 L |
3055 | /* Don't create the PLT entry if there are only function pointer |
3056 | relocations which can be resolved at run-time. */ | |
cbe950e9 | 3057 | else if (htab->elf.dynamic_sections_created |
04ebc307 L |
3058 | && (h->plt.refcount > eh->func_pointer_refcount |
3059 | || eh->plt_got.refcount > 0)) | |
c434dee6 | 3060 | { |
dc2be3d2 | 3061 | bfd_boolean use_plt_got = eh->plt_got.refcount > 0; |
25070364 | 3062 | |
04ebc307 L |
3063 | /* Clear the reference count of function pointer relocations |
3064 | if PLT is used. */ | |
3065 | eh->func_pointer_refcount = 0; | |
3066 | ||
c434dee6 AJ |
3067 | /* Make sure this symbol is output as a dynamic symbol. |
3068 | Undefined weak syms won't yet be marked as dynamic. */ | |
3069 | if (h->dynindx == -1 | |
aec6b87e | 3070 | && !h->forced_local |
9e9821dd L |
3071 | && !resolved_to_zero |
3072 | && h->root.type == bfd_link_hash_undefweak) | |
c434dee6 | 3073 | { |
c152c796 | 3074 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 3075 | return FALSE; |
c434dee6 AJ |
3076 | } |
3077 | ||
0e1862bb | 3078 | if (bfd_link_pic (info) |
27482721 | 3079 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
c434dee6 | 3080 | { |
6de2ae4a | 3081 | asection *s = htab->elf.splt; |
f2c29a16 | 3082 | asection *second_s = htab->plt_second; |
dd7e64d4 | 3083 | asection *got_s = htab->plt_got; |
c434dee6 | 3084 | |
7c1e8d3e L |
3085 | /* If this is the first .plt entry, make room for the special |
3086 | first entry. The .plt section is used by prelink to undo | |
3087 | prelinking for dynamic relocations. */ | |
3088 | if (s->size == 0) | |
38b12349 | 3089 | s->size = htab->plt.has_plt0 * plt_entry_size; |
7c1e8d3e | 3090 | |
dd7e64d4 L |
3091 | if (use_plt_got) |
3092 | eh->plt_got.offset = got_s->size; | |
3093 | else | |
3094 | { | |
3095 | h->plt.offset = s->size; | |
f2c29a16 L |
3096 | if (second_s) |
3097 | eh->plt_second.offset = second_s->size; | |
dd7e64d4 | 3098 | } |
c434dee6 AJ |
3099 | |
3100 | /* If this symbol is not defined in a regular file, and we are | |
3101 | not generating a shared library, then set the symbol to this | |
3102 | location in the .plt. This is required to make function | |
3103 | pointers compare as equal between the normal executable and | |
3104 | the shared library. */ | |
0e1862bb | 3105 | if (! bfd_link_pic (info) |
f5385ebf | 3106 | && !h->def_regular) |
c434dee6 | 3107 | { |
dd7e64d4 | 3108 | if (use_plt_got) |
0ff2b86e | 3109 | { |
dd7e64d4 L |
3110 | /* We need to make a call to the entry of the GOT PLT |
3111 | instead of regular PLT entry. */ | |
3112 | h->root.u.def.section = got_s; | |
3113 | h->root.u.def.value = eh->plt_got.offset; | |
0ff2b86e L |
3114 | } |
3115 | else | |
3116 | { | |
f2c29a16 | 3117 | if (second_s) |
dd7e64d4 | 3118 | { |
f2c29a16 L |
3119 | /* We need to make a call to the entry of the |
3120 | second PLT instead of regular PLT entry. */ | |
3121 | h->root.u.def.section = second_s; | |
3122 | h->root.u.def.value = eh->plt_second.offset; | |
dd7e64d4 L |
3123 | } |
3124 | else | |
3125 | { | |
3126 | h->root.u.def.section = s; | |
3127 | h->root.u.def.value = h->plt.offset; | |
3128 | } | |
0ff2b86e | 3129 | } |
c434dee6 AJ |
3130 | } |
3131 | ||
3132 | /* Make room for this entry. */ | |
dd7e64d4 | 3133 | if (use_plt_got) |
38b12349 | 3134 | got_s->size += htab->non_lazy_plt->plt_entry_size; |
dd7e64d4 L |
3135 | else |
3136 | { | |
3137 | s->size += plt_entry_size; | |
f2c29a16 L |
3138 | if (second_s) |
3139 | second_s->size += htab->non_lazy_plt->plt_entry_size; | |
c434dee6 | 3140 | |
dd7e64d4 L |
3141 | /* We also need to make an entry in the .got.plt section, |
3142 | which will be placed in the .got section by the linker | |
3143 | script. */ | |
3144 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; | |
c434dee6 | 3145 | |
aec6b87e L |
3146 | /* There should be no PLT relocation against resolved |
3147 | undefined weak symbol in executable. */ | |
3148 | if (!resolved_to_zero) | |
3149 | { | |
3150 | /* We also need to make an entry in the .rela.plt | |
3151 | section. */ | |
3152 | htab->elf.srelplt->size += bed->s->sizeof_rela; | |
3153 | htab->elf.srelplt->reloc_count++; | |
3154 | } | |
dd7e64d4 | 3155 | } |
c434dee6 AJ |
3156 | } |
3157 | else | |
3158 | { | |
13f42277 | 3159 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 3160 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 3161 | h->needs_plt = 0; |
c434dee6 AJ |
3162 | } |
3163 | } | |
3164 | else | |
3165 | { | |
13f42277 | 3166 | eh->plt_got.offset = (bfd_vma) -1; |
c434dee6 | 3167 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 3168 | h->needs_plt = 0; |
c434dee6 AJ |
3169 | } |
3170 | ||
67a4f2b7 AO |
3171 | eh->tlsdesc_got = (bfd_vma) -1; |
3172 | ||
bffbf940 JJ |
3173 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
3174 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
3175 | if (h->got.refcount > 0 | |
0e1862bb | 3176 | && bfd_link_executable (info) |
bffbf940 | 3177 | && h->dynindx == -1 |
351f65ca | 3178 | && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) |
d8045f23 NC |
3179 | { |
3180 | h->got.offset = (bfd_vma) -1; | |
3181 | } | |
bffbf940 | 3182 | else if (h->got.refcount > 0) |
c434dee6 AJ |
3183 | { |
3184 | asection *s; | |
b34976b6 | 3185 | bfd_boolean dyn; |
351f65ca | 3186 | int tls_type = elf_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
3187 | |
3188 | /* Make sure this symbol is output as a dynamic symbol. | |
3189 | Undefined weak syms won't yet be marked as dynamic. */ | |
3190 | if (h->dynindx == -1 | |
aec6b87e | 3191 | && !h->forced_local |
9e9821dd L |
3192 | && !resolved_to_zero |
3193 | && h->root.type == bfd_link_hash_undefweak) | |
c434dee6 | 3194 | { |
c152c796 | 3195 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 3196 | return FALSE; |
c434dee6 AJ |
3197 | } |
3198 | ||
67a4f2b7 AO |
3199 | if (GOT_TLS_GDESC_P (tls_type)) |
3200 | { | |
6de2ae4a | 3201 | eh->tlsdesc_got = htab->elf.sgotplt->size |
351f65ca | 3202 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 3203 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
3204 | h->got.offset = (bfd_vma) -2; |
3205 | } | |
3206 | if (! GOT_TLS_GDESC_P (tls_type) | |
3207 | || GOT_TLS_GD_P (tls_type)) | |
3208 | { | |
6de2ae4a | 3209 | s = htab->elf.sgot; |
67a4f2b7 AO |
3210 | h->got.offset = s->size; |
3211 | s->size += GOT_ENTRY_SIZE; | |
3212 | if (GOT_TLS_GD_P (tls_type)) | |
3213 | s->size += GOT_ENTRY_SIZE; | |
3214 | } | |
c434dee6 | 3215 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 | 3216 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
aec6b87e L |
3217 | and two if global. R_X86_64_GOTTPOFF needs one dynamic |
3218 | relocation. No dynamic relocation against resolved undefined | |
3219 | weak symbol in executable. */ | |
67a4f2b7 | 3220 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 3221 | || tls_type == GOT_TLS_IE) |
351f65ca | 3222 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 | 3223 | else if (GOT_TLS_GD_P (tls_type)) |
351f65ca | 3224 | htab->elf.srelgot->size += 2 * bed->s->sizeof_rela; |
67a4f2b7 | 3225 | else if (! GOT_TLS_GDESC_P (tls_type) |
aec6b87e L |
3226 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
3227 | && !resolved_to_zero) | |
67a4f2b7 | 3228 | || h->root.type != bfd_link_hash_undefweak) |
0e1862bb | 3229 | && (bfd_link_pic (info) |
27482721 | 3230 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
351f65ca | 3231 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
3232 | if (GOT_TLS_GDESC_P (tls_type)) |
3233 | { | |
351f65ca | 3234 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
3235 | htab->tlsdesc_plt = (bfd_vma) -1; |
3236 | } | |
c434dee6 AJ |
3237 | } |
3238 | else | |
3239 | h->got.offset = (bfd_vma) -1; | |
3240 | ||
c434dee6 | 3241 | if (eh->dyn_relocs == NULL) |
b34976b6 | 3242 | return TRUE; |
c434dee6 AJ |
3243 | |
3244 | /* In the shared -Bsymbolic case, discard space allocated for | |
3245 | dynamic pc-relative relocs against symbols which turn out to be | |
3246 | defined in regular objects. For the normal shared case, discard | |
3247 | space for pc-relative relocs that have become local due to symbol | |
3248 | visibility changes. */ | |
3249 | ||
0e1862bb | 3250 | if (bfd_link_pic (info)) |
c434dee6 | 3251 | { |
27482721 AJ |
3252 | /* Relocs that use pc_count are those that appear on a call |
3253 | insn, or certain REL relocs that can generated via assembly. | |
3254 | We want calls to protected symbols to resolve directly to the | |
3255 | function rather than going via the plt. If people want | |
3256 | function pointer comparisons to work as expected then they | |
3257 | should avoid writing weird assembly. */ | |
3258 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 3259 | { |
e03a8ed8 | 3260 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
3261 | |
3262 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
3263 | { | |
c3ce498c L |
3264 | p->count -= p->pc_count; |
3265 | p->pc_count = 0; | |
c434dee6 AJ |
3266 | if (p->count == 0) |
3267 | *pp = p->next; | |
3268 | else | |
3269 | pp = &p->next; | |
3270 | } | |
3271 | } | |
4e795f50 AM |
3272 | |
3273 | /* Also discard relocs on undefined weak syms with non-default | |
aec6b87e | 3274 | visibility or in PIE. */ |
31c0ebfe | 3275 | if (eh->dyn_relocs != NULL) |
22d606e9 | 3276 | { |
31c0ebfe L |
3277 | if (h->root.type == bfd_link_hash_undefweak) |
3278 | { | |
aec6b87e L |
3279 | /* Undefined weak symbol is never bound locally in shared |
3280 | library. */ | |
3281 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
3282 | || resolved_to_zero) | |
31c0ebfe | 3283 | eh->dyn_relocs = NULL; |
31c0ebfe L |
3284 | else if (h->dynindx == -1 |
3285 | && ! h->forced_local | |
3286 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
3287 | return FALSE; | |
3288 | } | |
9d1d54d5 L |
3289 | /* For PIE, discard space for pc-relative relocs against |
3290 | symbols which turn out to need copy relocs. */ | |
0e1862bb | 3291 | else if (bfd_link_executable (info) |
bc696fd5 | 3292 | && (h->needs_copy || eh->needs_copy) |
31c0ebfe L |
3293 | && h->def_dynamic |
3294 | && !h->def_regular) | |
9d1d54d5 L |
3295 | { |
3296 | struct elf_dyn_relocs **pp; | |
3297 | ||
3298 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
3299 | { | |
3300 | if (p->pc_count != 0) | |
3301 | *pp = p->next; | |
3302 | else | |
3303 | pp = &p->next; | |
3304 | } | |
3305 | } | |
22d606e9 | 3306 | } |
d8045f23 | 3307 | } |
d40d037c | 3308 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
3309 | { |
3310 | /* For the non-shared case, discard space for relocs against | |
3311 | symbols which turn out to need copy relocs or are not | |
04ebc307 L |
3312 | dynamic. Keep dynamic relocations for run-time function |
3313 | pointer initialization. */ | |
c434dee6 | 3314 | |
aec6b87e L |
3315 | if ((!h->non_got_ref |
3316 | || eh->func_pointer_refcount > 0 | |
3317 | || (h->root.type == bfd_link_hash_undefweak | |
3318 | && !resolved_to_zero)) | |
f5385ebf AM |
3319 | && ((h->def_dynamic |
3320 | && !h->def_regular) | |
c434dee6 AJ |
3321 | || (htab->elf.dynamic_sections_created |
3322 | && (h->root.type == bfd_link_hash_undefweak | |
3323 | || h->root.type == bfd_link_hash_undefined)))) | |
3324 | { | |
3325 | /* Make sure this symbol is output as a dynamic symbol. | |
3326 | Undefined weak syms won't yet be marked as dynamic. */ | |
3327 | if (h->dynindx == -1 | |
d8045f23 | 3328 | && ! h->forced_local |
aec6b87e | 3329 | && ! resolved_to_zero |
9e9821dd | 3330 | && h->root.type == bfd_link_hash_undefweak |
d8045f23 NC |
3331 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
3332 | return FALSE; | |
c434dee6 AJ |
3333 | |
3334 | /* If that succeeded, we know we'll be keeping all the | |
3335 | relocs. */ | |
3336 | if (h->dynindx != -1) | |
3337 | goto keep; | |
3338 | } | |
3339 | ||
3340 | eh->dyn_relocs = NULL; | |
04ebc307 | 3341 | eh->func_pointer_refcount = 0; |
c434dee6 AJ |
3342 | |
3343 | keep: ; | |
3344 | } | |
3345 | ||
3346 | /* Finally, allocate space. */ | |
3347 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
3348 | { | |
e7c33416 NC |
3349 | asection * sreloc; |
3350 | ||
cbe950e9 | 3351 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
3352 | |
3353 | BFD_ASSERT (sreloc != NULL); | |
3354 | ||
351f65ca | 3355 | sreloc->size += p->count * bed->s->sizeof_rela; |
c434dee6 AJ |
3356 | } |
3357 | ||
b34976b6 | 3358 | return TRUE; |
c434dee6 AJ |
3359 | } |
3360 | ||
c25bc9fc L |
3361 | /* Allocate space in .plt, .got and associated reloc sections for |
3362 | local dynamic relocs. */ | |
3363 | ||
3364 | static bfd_boolean | |
351f65ca | 3365 | elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf) |
c25bc9fc L |
3366 | { |
3367 | struct elf_link_hash_entry *h | |
3368 | = (struct elf_link_hash_entry *) *slot; | |
3369 | ||
3370 | if (h->type != STT_GNU_IFUNC | |
3371 | || !h->def_regular | |
3372 | || !h->ref_regular | |
3373 | || !h->forced_local | |
3374 | || h->root.type != bfd_link_hash_defined) | |
3375 | abort (); | |
3376 | ||
351f65ca | 3377 | return elf_x86_64_allocate_dynrelocs (h, inf); |
c25bc9fc L |
3378 | } |
3379 | ||
c434dee6 AJ |
3380 | /* Find any dynamic relocs that apply to read-only sections. */ |
3381 | ||
b34976b6 | 3382 | static bfd_boolean |
351f65ca L |
3383 | elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h, |
3384 | void * inf) | |
c434dee6 | 3385 | { |
351f65ca | 3386 | struct elf_x86_64_link_hash_entry *eh; |
e03a8ed8 | 3387 | struct elf_dyn_relocs *p; |
c434dee6 | 3388 | |
aa715242 L |
3389 | /* Skip local IFUNC symbols. */ |
3390 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
3391 | return TRUE; | |
3392 | ||
351f65ca | 3393 | eh = (struct elf_x86_64_link_hash_entry *) h; |
c434dee6 AJ |
3394 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
3395 | { | |
3396 | asection *s = p->sec->output_section; | |
3397 | ||
3398 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
3399 | { | |
3400 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
3401 | ||
3402 | info->flags |= DF_TEXTREL; | |
3403 | ||
0e1862bb | 3404 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd | 3405 | || info->error_textrel) |
695344c0 | 3406 | /* xgettext:c-format */ |
1952c5cd | 3407 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"), |
b70321a2 L |
3408 | p->sec->owner, h->root.root.string, |
3409 | p->sec); | |
3410 | ||
c434dee6 | 3411 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 3412 | return FALSE; |
c434dee6 AJ |
3413 | } |
3414 | } | |
b34976b6 | 3415 | return TRUE; |
c434dee6 AJ |
3416 | } |
3417 | ||
c175a657 | 3418 | /* Convert load via the GOT slot to load immediate. */ |
daa67607 L |
3419 | |
3420 | static bfd_boolean | |
56ceb5b5 L |
3421 | elf_x86_64_convert_load (bfd *abfd, asection *sec, |
3422 | struct bfd_link_info *link_info) | |
daa67607 L |
3423 | { |
3424 | Elf_Internal_Shdr *symtab_hdr; | |
3425 | Elf_Internal_Rela *internal_relocs; | |
3426 | Elf_Internal_Rela *irel, *irelend; | |
3427 | bfd_byte *contents; | |
3428 | struct elf_x86_64_link_hash_table *htab; | |
c175a657 | 3429 | bfd_boolean changed; |
daa67607 L |
3430 | bfd_signed_vma *local_got_refcounts; |
3431 | ||
3432 | /* Don't even try to convert non-ELF outputs. */ | |
3433 | if (!is_elf_hash_table (link_info->hash)) | |
3434 | return FALSE; | |
3435 | ||
c1d11331 | 3436 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 3437 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
56ceb5b5 | 3438 | || sec->need_convert_load == 0 |
c8831961 | 3439 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
3440 | return TRUE; |
3441 | ||
3442 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3443 | ||
3444 | /* Load the relocations for this section. */ | |
3445 | internal_relocs = (_bfd_elf_link_read_relocs | |
3446 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
3447 | link_info->keep_memory)); | |
3448 | if (internal_relocs == NULL) | |
3449 | return FALSE; | |
3450 | ||
c175a657 | 3451 | changed = FALSE; |
daa67607 | 3452 | htab = elf_x86_64_hash_table (link_info); |
daa67607 L |
3453 | local_got_refcounts = elf_local_got_refcounts (abfd); |
3454 | ||
3455 | /* Get the section contents. */ | |
3456 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
3457 | contents = elf_section_data (sec)->this_hdr.contents; | |
3458 | else | |
3459 | { | |
3460 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
3461 | goto error_return; | |
3462 | } | |
3463 | ||
3464 | irelend = internal_relocs + sec->reloc_count; | |
3465 | for (irel = internal_relocs; irel < irelend; irel++) | |
3466 | { | |
3467 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
c175a657 | 3468 | unsigned int r_symndx; |
daa67607 | 3469 | struct elf_link_hash_entry *h; |
c175a657 | 3470 | bfd_boolean converted; |
59cab532 | 3471 | |
c175a657 L |
3472 | if (r_type != R_X86_64_GOTPCRELX |
3473 | && r_type != R_X86_64_REX_GOTPCRELX | |
3474 | && r_type != R_X86_64_GOTPCREL) | |
dfc87947 L |
3475 | continue; |
3476 | ||
c175a657 | 3477 | r_symndx = htab->r_sym (irel->r_info); |
daa67607 | 3478 | if (r_symndx < symtab_hdr->sh_info) |
c175a657 L |
3479 | h = elf_x86_64_get_local_sym_hash (htab, sec->owner, |
3480 | (const Elf_Internal_Rela *) irel, | |
3481 | FALSE); | |
59cab532 L |
3482 | else |
3483 | { | |
c175a657 | 3484 | h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info]; |
59cab532 L |
3485 | while (h->root.type == bfd_link_hash_indirect |
3486 | || h->root.type == bfd_link_hash_warning) | |
3487 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
59cab532 L |
3488 | } |
3489 | ||
c175a657 L |
3490 | /* STT_GNU_IFUNC must keep GOTPCREL relocations. */ |
3491 | if (h != NULL && h->type == STT_GNU_IFUNC) | |
3492 | continue; | |
daa67607 | 3493 | |
c175a657 L |
3494 | converted = FALSE; |
3495 | if (!elf_x86_64_convert_load_reloc (abfd, sec, contents, irel, h, | |
3496 | &converted, link_info)) | |
3497 | goto error_return; | |
56ceb5b5 | 3498 | |
c175a657 | 3499 | if (converted) |
56ceb5b5 | 3500 | { |
c175a657 L |
3501 | changed = converted; |
3502 | if (h) | |
56ceb5b5 | 3503 | { |
c175a657 L |
3504 | if (h->got.refcount > 0) |
3505 | h->got.refcount -= 1; | |
56ceb5b5 L |
3506 | } |
3507 | else | |
3508 | { | |
c175a657 L |
3509 | if (local_got_refcounts != NULL |
3510 | && local_got_refcounts[r_symndx] > 0) | |
3511 | local_got_refcounts[r_symndx] -= 1; | |
56ceb5b5 | 3512 | } |
daa67607 L |
3513 | } |
3514 | } | |
3515 | ||
3516 | if (contents != NULL | |
3517 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3518 | { | |
c175a657 | 3519 | if (!changed && !link_info->keep_memory) |
daa67607 L |
3520 | free (contents); |
3521 | else | |
3522 | { | |
3523 | /* Cache the section contents for elf_link_input_bfd. */ | |
3524 | elf_section_data (sec)->this_hdr.contents = contents; | |
3525 | } | |
3526 | } | |
3527 | ||
3528 | if (elf_section_data (sec)->relocs != internal_relocs) | |
3529 | { | |
c175a657 | 3530 | if (!changed) |
daa67607 L |
3531 | free (internal_relocs); |
3532 | else | |
3533 | elf_section_data (sec)->relocs = internal_relocs; | |
3534 | } | |
3535 | ||
3536 | return TRUE; | |
3537 | ||
3538 | error_return: | |
3539 | if (contents != NULL | |
3540 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3541 | free (contents); | |
3542 | if (internal_relocs != NULL | |
3543 | && elf_section_data (sec)->relocs != internal_relocs) | |
3544 | free (internal_relocs); | |
3545 | return FALSE; | |
3546 | } | |
3547 | ||
70256ad8 AJ |
3548 | /* Set the sizes of the dynamic sections. */ |
3549 | ||
b34976b6 | 3550 | static bfd_boolean |
351f65ca L |
3551 | elf_x86_64_size_dynamic_sections (bfd *output_bfd, |
3552 | struct bfd_link_info *info) | |
70256ad8 | 3553 | { |
351f65ca | 3554 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
3555 | bfd *dynobj; |
3556 | asection *s; | |
b34976b6 | 3557 | bfd_boolean relocs; |
c434dee6 | 3558 | bfd *ibfd; |
351f65ca | 3559 | const struct elf_backend_data *bed; |
70256ad8 | 3560 | |
351f65ca | 3561 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3562 | if (htab == NULL) |
3563 | return FALSE; | |
351f65ca | 3564 | bed = get_elf_backend_data (output_bfd); |
4dfe6ac6 | 3565 | |
c434dee6 AJ |
3566 | dynobj = htab->elf.dynobj; |
3567 | if (dynobj == NULL) | |
3568 | abort (); | |
70256ad8 | 3569 | |
c434dee6 AJ |
3570 | /* Set up .got offsets for local syms, and space for local dynamic |
3571 | relocs. */ | |
c72f2fb2 | 3572 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
70256ad8 | 3573 | { |
c434dee6 AJ |
3574 | bfd_signed_vma *local_got; |
3575 | bfd_signed_vma *end_local_got; | |
bffbf940 | 3576 | char *local_tls_type; |
67a4f2b7 | 3577 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
3578 | bfd_size_type locsymcount; |
3579 | Elf_Internal_Shdr *symtab_hdr; | |
3580 | asection *srel; | |
70256ad8 | 3581 | |
0ffa91dd | 3582 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
3583 | continue; |
3584 | ||
c434dee6 | 3585 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 3586 | { |
e03a8ed8 | 3587 | struct elf_dyn_relocs *p; |
c434dee6 | 3588 | |
56ceb5b5 | 3589 | if (!elf_x86_64_convert_load (ibfd, s, info)) |
daa67607 L |
3590 | return FALSE; |
3591 | ||
e03a8ed8 | 3592 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 3593 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
3594 | p != NULL; |
3595 | p = p->next) | |
70256ad8 | 3596 | { |
c434dee6 AJ |
3597 | if (!bfd_is_abs_section (p->sec) |
3598 | && bfd_is_abs_section (p->sec->output_section)) | |
3599 | { | |
3600 | /* Input section has been discarded, either because | |
3601 | it is a copy of a linkonce section or due to | |
3602 | linker script /DISCARD/, so we'll be discarding | |
3603 | the relocs too. */ | |
3604 | } | |
3605 | else if (p->count != 0) | |
3606 | { | |
3607 | srel = elf_section_data (p->sec)->sreloc; | |
351f65ca | 3608 | srel->size += p->count * bed->s->sizeof_rela; |
4b819e1f L |
3609 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
3610 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
3611 | { |
3612 | info->flags |= DF_TEXTREL; | |
0e1862bb | 3613 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd | 3614 | || info->error_textrel) |
695344c0 | 3615 | /* xgettext:c-format */ |
1952c5cd | 3616 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), |
b70321a2 | 3617 | p->sec->owner, p->sec); |
b70321a2 | 3618 | } |
c434dee6 | 3619 | } |
70256ad8 AJ |
3620 | } |
3621 | } | |
c434dee6 AJ |
3622 | |
3623 | local_got = elf_local_got_refcounts (ibfd); | |
3624 | if (!local_got) | |
3625 | continue; | |
3626 | ||
0ffa91dd | 3627 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
3628 | locsymcount = symtab_hdr->sh_info; |
3629 | end_local_got = local_got + locsymcount; | |
351f65ca L |
3630 | local_tls_type = elf_x86_64_local_got_tls_type (ibfd); |
3631 | local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd); | |
6de2ae4a L |
3632 | s = htab->elf.sgot; |
3633 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
3634 | for (; local_got < end_local_got; |
3635 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 3636 | { |
67a4f2b7 | 3637 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 3638 | if (*local_got > 0) |
70256ad8 | 3639 | { |
67a4f2b7 AO |
3640 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
3641 | { | |
6de2ae4a | 3642 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
351f65ca | 3643 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 3644 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
3645 | *local_got = (bfd_vma) -2; |
3646 | } | |
3647 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3648 | || GOT_TLS_GD_P (*local_tls_type)) | |
3649 | { | |
3650 | *local_got = s->size; | |
3651 | s->size += GOT_ENTRY_SIZE; | |
3652 | if (GOT_TLS_GD_P (*local_tls_type)) | |
3653 | s->size += GOT_ENTRY_SIZE; | |
3654 | } | |
0e1862bb | 3655 | if (bfd_link_pic (info) |
67a4f2b7 | 3656 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 3657 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
3658 | { |
3659 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
3660 | { | |
6de2ae4a | 3661 | htab->elf.srelplt->size |
351f65ca | 3662 | += bed->s->sizeof_rela; |
67a4f2b7 AO |
3663 | htab->tlsdesc_plt = (bfd_vma) -1; |
3664 | } | |
3665 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3666 | || GOT_TLS_GD_P (*local_tls_type)) | |
351f65ca | 3667 | srel->size += bed->s->sizeof_rela; |
67a4f2b7 | 3668 | } |
70256ad8 AJ |
3669 | } |
3670 | else | |
c434dee6 AJ |
3671 | *local_got = (bfd_vma) -1; |
3672 | } | |
3673 | } | |
70256ad8 | 3674 | |
bffbf940 JJ |
3675 | if (htab->tls_ld_got.refcount > 0) |
3676 | { | |
3677 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
3678 | relocs. */ | |
6de2ae4a L |
3679 | htab->tls_ld_got.offset = htab->elf.sgot->size; |
3680 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; | |
351f65ca | 3681 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
bffbf940 JJ |
3682 | } |
3683 | else | |
3684 | htab->tls_ld_got.offset = -1; | |
3685 | ||
c434dee6 AJ |
3686 | /* Allocate global sym .plt and .got entries, and space for global |
3687 | sym dynamic relocs. */ | |
351f65ca | 3688 | elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs, |
eb4ff4d6 | 3689 | info); |
c434dee6 | 3690 | |
c25bc9fc L |
3691 | /* Allocate .plt and .got entries, and space for local symbols. */ |
3692 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 3693 | elf_x86_64_allocate_local_dynrelocs, |
c25bc9fc L |
3694 | info); |
3695 | ||
67a4f2b7 AO |
3696 | /* For every jump slot reserved in the sgotplt, reloc_count is |
3697 | incremented. However, when we reserve space for TLS descriptors, | |
3698 | it's not incremented, so in order to compute the space reserved | |
3699 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 L |
3700 | slot size. |
3701 | ||
3702 | PR ld/13302: We start next_irelative_index at the end of .rela.plt | |
3703 | so that R_X86_64_IRELATIVE entries come last. */ | |
6de2ae4a | 3704 | if (htab->elf.srelplt) |
e1f98742 L |
3705 | { |
3706 | htab->sgotplt_jump_table_size | |
3707 | = elf_x86_64_compute_jump_table_size (htab); | |
3708 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
3709 | } | |
3710 | else if (htab->elf.irelplt) | |
3711 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
67a4f2b7 AO |
3712 | |
3713 | if (htab->tlsdesc_plt) | |
3714 | { | |
3715 | /* If we're not using lazy TLS relocations, don't generate the | |
3716 | PLT and GOT entries they require. */ | |
3717 | if ((info->flags & DF_BIND_NOW)) | |
3718 | htab->tlsdesc_plt = 0; | |
3719 | else | |
3720 | { | |
6de2ae4a L |
3721 | htab->tlsdesc_got = htab->elf.sgot->size; |
3722 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
3723 | /* Reserve room for the initial entry. |
3724 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a | 3725 | if (htab->elf.splt->size == 0) |
38b12349 | 3726 | htab->elf.splt->size = htab->plt.plt_entry_size; |
6de2ae4a | 3727 | htab->tlsdesc_plt = htab->elf.splt->size; |
38b12349 | 3728 | htab->elf.splt->size += htab->plt.plt_entry_size; |
67a4f2b7 AO |
3729 | } |
3730 | } | |
3731 | ||
a7b16ceb L |
3732 | if (htab->elf.sgotplt) |
3733 | { | |
3734 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
eed180f8 | 3735 | entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
3736 | if ((htab->elf.hgot == NULL |
3737 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
3738 | && (htab->elf.sgotplt->size |
3739 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
3740 | && (htab->elf.splt == NULL |
3741 | || htab->elf.splt->size == 0) | |
3742 | && (htab->elf.sgot == NULL | |
3743 | || htab->elf.sgot->size == 0) | |
3744 | && (htab->elf.iplt == NULL | |
3745 | || htab->elf.iplt->size == 0) | |
3746 | && (htab->elf.igotplt == NULL | |
3747 | || htab->elf.igotplt->size == 0)) | |
3748 | htab->elf.sgotplt->size = 0; | |
3749 | } | |
3750 | ||
fff53dae | 3751 | if (_bfd_elf_eh_frame_present (info)) |
9a2a56cc | 3752 | { |
fff53dae L |
3753 | if (htab->plt_eh_frame != NULL |
3754 | && htab->elf.splt != NULL | |
3755 | && htab->elf.splt->size != 0 | |
3756 | && !bfd_is_abs_section (htab->elf.splt->output_section)) | |
38b12349 | 3757 | htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size; |
fff53dae L |
3758 | |
3759 | if (htab->plt_got_eh_frame != NULL | |
3760 | && htab->plt_got != NULL | |
3761 | && htab->plt_got->size != 0 | |
3762 | && !bfd_is_abs_section (htab->plt_got->output_section)) | |
38b12349 L |
3763 | htab->plt_got_eh_frame->size |
3764 | = htab->non_lazy_plt->eh_frame_plt_size; | |
8361ed4d | 3765 | |
f2c29a16 | 3766 | /* Unwind info for the second PLT and .plt.got sections are |
8361ed4d | 3767 | identical. */ |
f2c29a16 L |
3768 | if (htab->plt_second_eh_frame != NULL |
3769 | && htab->plt_second != NULL | |
3770 | && htab->plt_second->size != 0 | |
3771 | && !bfd_is_abs_section (htab->plt_second->output_section)) | |
3772 | htab->plt_second_eh_frame->size | |
38b12349 | 3773 | = htab->non_lazy_plt->eh_frame_plt_size; |
9a2a56cc AM |
3774 | } |
3775 | ||
c434dee6 AJ |
3776 | /* We now have determined the sizes of the various dynamic sections. |
3777 | Allocate memory for them. */ | |
b34976b6 | 3778 | relocs = FALSE; |
c434dee6 AJ |
3779 | for (s = dynobj->sections; s != NULL; s = s->next) |
3780 | { | |
3781 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3782 | continue; | |
3783 | ||
6de2ae4a L |
3784 | if (s == htab->elf.splt |
3785 | || s == htab->elf.sgot | |
3786 | || s == htab->elf.sgotplt | |
3787 | || s == htab->elf.iplt | |
3788 | || s == htab->elf.igotplt | |
f2c29a16 | 3789 | || s == htab->plt_second |
dd7e64d4 | 3790 | || s == htab->plt_got |
9a2a56cc | 3791 | || s == htab->plt_eh_frame |
fff53dae | 3792 | || s == htab->plt_got_eh_frame |
f2c29a16 | 3793 | || s == htab->plt_second_eh_frame |
5474d94f AM |
3794 | || s == htab->elf.sdynbss |
3795 | || s == htab->elf.sdynrelro) | |
c434dee6 AJ |
3796 | { |
3797 | /* Strip this section if we don't need it; see the | |
3798 | comment below. */ | |
3799 | } | |
0112cd26 | 3800 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 3801 | { |
6de2ae4a | 3802 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 3803 | relocs = TRUE; |
c434dee6 AJ |
3804 | |
3805 | /* We use the reloc_count field as a counter if we need | |
3806 | to copy relocs into the output file. */ | |
6de2ae4a | 3807 | if (s != htab->elf.srelplt) |
67a4f2b7 | 3808 | s->reloc_count = 0; |
70256ad8 | 3809 | } |
c434dee6 | 3810 | else |
70256ad8 AJ |
3811 | { |
3812 | /* It's not one of our sections, so don't allocate space. */ | |
3813 | continue; | |
3814 | } | |
3815 | ||
eea6121a | 3816 | if (s->size == 0) |
70256ad8 | 3817 | { |
c434dee6 AJ |
3818 | /* If we don't need this section, strip it from the |
3819 | output file. This is mostly to handle .rela.bss and | |
3820 | .rela.plt. We must create both sections in | |
3821 | create_dynamic_sections, because they must be created | |
3822 | before the linker maps input sections to output | |
3823 | sections. The linker does that before | |
3824 | adjust_dynamic_symbol is called, and it is that | |
3825 | function which decides whether anything needs to go | |
3826 | into these sections. */ | |
3827 | ||
8423293d | 3828 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
3829 | continue; |
3830 | } | |
3831 | ||
c456f082 AM |
3832 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3833 | continue; | |
3834 | ||
70256ad8 AJ |
3835 | /* Allocate memory for the section contents. We use bfd_zalloc |
3836 | here in case unused entries are not reclaimed before the | |
3837 | section's contents are written out. This should not happen, | |
3838 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
3839 | of garbage. */ | |
eea6121a | 3840 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 3841 | if (s->contents == NULL) |
b34976b6 | 3842 | return FALSE; |
70256ad8 AJ |
3843 | } |
3844 | ||
e41b3a13 | 3845 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3846 | && htab->plt_eh_frame->contents != NULL) |
3847 | { | |
9a2a56cc | 3848 | memcpy (htab->plt_eh_frame->contents, |
38b12349 | 3849 | htab->plt.eh_frame_plt, htab->plt_eh_frame->size); |
9a2a56cc AM |
3850 | bfd_put_32 (dynobj, htab->elf.splt->size, |
3851 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
3852 | } | |
e41b3a13 | 3853 | |
fff53dae L |
3854 | if (htab->plt_got_eh_frame != NULL |
3855 | && htab->plt_got_eh_frame->contents != NULL) | |
3856 | { | |
fff53dae | 3857 | memcpy (htab->plt_got_eh_frame->contents, |
38b12349 | 3858 | htab->non_lazy_plt->eh_frame_plt, |
fff53dae L |
3859 | htab->plt_got_eh_frame->size); |
3860 | bfd_put_32 (dynobj, htab->plt_got->size, | |
3861 | (htab->plt_got_eh_frame->contents | |
3862 | + PLT_FDE_LEN_OFFSET)); | |
3863 | } | |
3864 | ||
f2c29a16 L |
3865 | if (htab->plt_second_eh_frame != NULL |
3866 | && htab->plt_second_eh_frame->contents != NULL) | |
8361ed4d | 3867 | { |
f2c29a16 | 3868 | memcpy (htab->plt_second_eh_frame->contents, |
38b12349 | 3869 | htab->non_lazy_plt->eh_frame_plt, |
f2c29a16 L |
3870 | htab->plt_second_eh_frame->size); |
3871 | bfd_put_32 (dynobj, htab->plt_second->size, | |
3872 | (htab->plt_second_eh_frame->contents | |
8361ed4d L |
3873 | + PLT_FDE_LEN_OFFSET)); |
3874 | } | |
3875 | ||
c434dee6 | 3876 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
3877 | { |
3878 | /* Add some entries to the .dynamic section. We fill in the | |
351f65ca | 3879 | values later, in elf_x86_64_finish_dynamic_sections, but we |
70256ad8 | 3880 | must add the entries now so that we get the correct size for |
407443a3 | 3881 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 3882 | dynamic linker and used by the debugger. */ |
dc810e39 | 3883 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3884 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3885 | |
0e1862bb | 3886 | if (bfd_link_executable (info)) |
70256ad8 | 3887 | { |
dc810e39 | 3888 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3889 | return FALSE; |
70256ad8 AJ |
3890 | } |
3891 | ||
6de2ae4a | 3892 | if (htab->elf.splt->size != 0) |
70256ad8 | 3893 | { |
7c1e8d3e L |
3894 | /* DT_PLTGOT is used by prelink even if there is no PLT |
3895 | relocation. */ | |
3896 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
b34976b6 | 3897 | return FALSE; |
97d343d4 | 3898 | } |
67a4f2b7 | 3899 | |
97d343d4 L |
3900 | if (htab->elf.srelplt->size != 0) |
3901 | { | |
3902 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
3903 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
3904 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
67a4f2b7 | 3905 | return FALSE; |
70256ad8 AJ |
3906 | } |
3907 | ||
97d343d4 L |
3908 | if (htab->tlsdesc_plt |
3909 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
3910 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
3911 | return FALSE; | |
3912 | ||
70256ad8 AJ |
3913 | if (relocs) |
3914 | { | |
dc810e39 AM |
3915 | if (!add_dynamic_entry (DT_RELA, 0) |
3916 | || !add_dynamic_entry (DT_RELASZ, 0) | |
351f65ca | 3917 | || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela)) |
b34976b6 | 3918 | return FALSE; |
70256ad8 | 3919 | |
c434dee6 AJ |
3920 | /* If any dynamic relocs apply to a read-only section, |
3921 | then we need a DT_TEXTREL entry. */ | |
3922 | if ((info->flags & DF_TEXTREL) == 0) | |
eed180f8 | 3923 | elf_link_hash_traverse (&htab->elf, |
351f65ca | 3924 | elf_x86_64_readonly_dynrelocs, |
eb4ff4d6 | 3925 | info); |
c434dee6 AJ |
3926 | |
3927 | if ((info->flags & DF_TEXTREL) != 0) | |
3928 | { | |
2df3368d | 3929 | if (htab->readonly_dynrelocs_against_ifunc) |
8efa2874 L |
3930 | { |
3931 | info->callbacks->einfo | |
3932 | (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n")); | |
3933 | bfd_set_error (bfd_error_bad_value); | |
3934 | return FALSE; | |
3935 | } | |
3936 | ||
c434dee6 | 3937 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 3938 | return FALSE; |
c434dee6 | 3939 | } |
70256ad8 AJ |
3940 | } |
3941 | } | |
dc810e39 | 3942 | #undef add_dynamic_entry |
70256ad8 | 3943 | |
b34976b6 | 3944 | return TRUE; |
70256ad8 AJ |
3945 | } |
3946 | ||
67a4f2b7 | 3947 | static bfd_boolean |
351f65ca L |
3948 | elf_x86_64_always_size_sections (bfd *output_bfd, |
3949 | struct bfd_link_info *info) | |
67a4f2b7 AO |
3950 | { |
3951 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3952 | ||
3953 | if (tls_sec) | |
3954 | { | |
3955 | struct elf_link_hash_entry *tlsbase; | |
3956 | ||
3957 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3958 | "_TLS_MODULE_BASE_", | |
3959 | FALSE, FALSE, FALSE); | |
3960 | ||
3961 | if (tlsbase && tlsbase->type == STT_TLS) | |
3962 | { | |
351f65ca | 3963 | struct elf_x86_64_link_hash_table *htab; |
67a4f2b7 AO |
3964 | struct bfd_link_hash_entry *bh = NULL; |
3965 | const struct elf_backend_data *bed | |
3966 | = get_elf_backend_data (output_bfd); | |
3967 | ||
351f65ca | 3968 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3969 | if (htab == NULL) |
3970 | return FALSE; | |
3971 | ||
67a4f2b7 AO |
3972 | if (!(_bfd_generic_link_add_one_symbol |
3973 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3974 | tls_sec, 0, NULL, FALSE, | |
3975 | bed->collect, &bh))) | |
3976 | return FALSE; | |
9f03412a | 3977 | |
4dfe6ac6 | 3978 | htab->tls_module_base = bh; |
9f03412a | 3979 | |
67a4f2b7 AO |
3980 | tlsbase = (struct elf_link_hash_entry *)bh; |
3981 | tlsbase->def_regular = 1; | |
3982 | tlsbase->other = STV_HIDDEN; | |
576fa883 | 3983 | tlsbase->root.linker_def = 1; |
67a4f2b7 AO |
3984 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
3985 | } | |
3986 | } | |
3987 | ||
3988 | return TRUE; | |
3989 | } | |
3990 | ||
9f03412a AO |
3991 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
3992 | executables. Rather than setting it to the beginning of the TLS | |
3993 | section, we have to set it to the end. This function may be called | |
3994 | multiple times, it is idempotent. */ | |
3995 | ||
3996 | static void | |
351f65ca | 3997 | elf_x86_64_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 3998 | { |
351f65ca | 3999 | struct elf_x86_64_link_hash_table *htab; |
9f03412a AO |
4000 | struct bfd_link_hash_entry *base; |
4001 | ||
0e1862bb | 4002 | if (!bfd_link_executable (info)) |
9f03412a AO |
4003 | return; |
4004 | ||
351f65ca | 4005 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4006 | if (htab == NULL) |
4007 | return; | |
9f03412a | 4008 | |
4dfe6ac6 NC |
4009 | base = htab->tls_module_base; |
4010 | if (base == NULL) | |
9f03412a AO |
4011 | return; |
4012 | ||
4dfe6ac6 | 4013 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
4014 | } |
4015 | ||
bffbf940 JJ |
4016 | /* Return the base VMA address which should be subtracted from real addresses |
4017 | when resolving @dtpoff relocation. | |
4018 | This is PT_TLS segment p_vaddr. */ | |
4019 | ||
4020 | static bfd_vma | |
351f65ca | 4021 | elf_x86_64_dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 4022 | { |
e1918d23 AM |
4023 | /* If tls_sec is NULL, we should have signalled an error already. */ |
4024 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 4025 | return 0; |
e1918d23 | 4026 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
4027 | } |
4028 | ||
4029 | /* Return the relocation value for @tpoff relocation | |
4030 | if STT_TLS virtual address is ADDRESS. */ | |
4031 | ||
4032 | static bfd_vma | |
351f65ca | 4033 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 4034 | { |
e1918d23 | 4035 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
4036 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
4037 | bfd_vma static_tls_size; | |
bffbf940 JJ |
4038 | |
4039 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 4040 | if (htab->tls_sec == NULL) |
bffbf940 | 4041 | return 0; |
7dc98aea RO |
4042 | |
4043 | /* Consider special static TLS alignment requirements. */ | |
4044 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
4045 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
4046 | } |
4047 | ||
90f487df L |
4048 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
4049 | branch? */ | |
4050 | ||
4051 | static bfd_boolean | |
4052 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
4053 | { | |
4054 | /* Opcode Instruction | |
4055 | 0xe8 call | |
4056 | 0xe9 jump | |
4057 | 0x0f 0x8x conditional jump */ | |
4058 | return ((offset > 0 | |
4059 | && (contents [offset - 1] == 0xe8 | |
4060 | || contents [offset - 1] == 0xe9)) | |
4061 | || (offset > 1 | |
4062 | && contents [offset - 2] == 0x0f | |
4063 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
4064 | } | |
4065 | ||
8d88c4ca NC |
4066 | /* Relocate an x86_64 ELF section. */ |
4067 | ||
b34976b6 | 4068 | static bfd_boolean |
351f65ca L |
4069 | elf_x86_64_relocate_section (bfd *output_bfd, |
4070 | struct bfd_link_info *info, | |
4071 | bfd *input_bfd, | |
4072 | asection *input_section, | |
4073 | bfd_byte *contents, | |
4074 | Elf_Internal_Rela *relocs, | |
4075 | Elf_Internal_Sym *local_syms, | |
4076 | asection **local_sections) | |
8d88c4ca | 4077 | { |
351f65ca | 4078 | struct elf_x86_64_link_hash_table *htab; |
8d88c4ca NC |
4079 | Elf_Internal_Shdr *symtab_hdr; |
4080 | struct elf_link_hash_entry **sym_hashes; | |
4081 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 4082 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 4083 | Elf_Internal_Rela *rel; |
60f2e42e | 4084 | Elf_Internal_Rela *wrel; |
8d88c4ca | 4085 | Elf_Internal_Rela *relend; |
38b12349 | 4086 | unsigned int plt_entry_size; |
8d88c4ca | 4087 | |
0ffa91dd NC |
4088 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
4089 | ||
338c190a L |
4090 | /* Skip if check_relocs failed. */ |
4091 | if (input_section->check_relocs_failed) | |
4092 | return FALSE; | |
4093 | ||
351f65ca | 4094 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4095 | if (htab == NULL) |
4096 | return FALSE; | |
38b12349 | 4097 | plt_entry_size = htab->plt.plt_entry_size; |
0ffa91dd | 4098 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
4099 | sym_hashes = elf_sym_hashes (input_bfd); |
4100 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
351f65ca | 4101 | local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 4102 | |
351f65ca | 4103 | elf_x86_64_set_tls_module_base (info); |
9f03412a | 4104 | |
60f2e42e | 4105 | rel = wrel = relocs; |
8d88c4ca | 4106 | relend = relocs + input_section->reloc_count; |
60f2e42e | 4107 | for (; rel < relend; wrel++, rel++) |
8d88c4ca | 4108 | { |
bffbf940 | 4109 | unsigned int r_type; |
8d88c4ca NC |
4110 | reloc_howto_type *howto; |
4111 | unsigned long r_symndx; | |
4112 | struct elf_link_hash_entry *h; | |
0ff2b86e | 4113 | struct elf_x86_64_link_hash_entry *eh; |
8d88c4ca NC |
4114 | Elf_Internal_Sym *sym; |
4115 | asection *sec; | |
0ff2b86e | 4116 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 4117 | bfd_vma relocation; |
b34976b6 | 4118 | bfd_boolean unresolved_reloc; |
8d88c4ca | 4119 | bfd_reloc_status_type r; |
bffbf940 | 4120 | int tls_type; |
0ff2b86e | 4121 | asection *base_got, *resolved_plt; |
1788fc08 | 4122 | bfd_vma st_size; |
aec6b87e | 4123 | bfd_boolean resolved_to_zero; |
9e9821dd | 4124 | bfd_boolean relative_reloc; |
8d88c4ca | 4125 | |
351f65ca | 4126 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
4127 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
4128 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
18954b29 L |
4129 | { |
4130 | if (wrel != rel) | |
4131 | *wrel = *rel; | |
4132 | continue; | |
4133 | } | |
8d88c4ca | 4134 | |
9911c0fc | 4135 | if (r_type >= (int) R_X86_64_standard) |
8da6118f | 4136 | { |
4eca0228 | 4137 | _bfd_error_handler |
695344c0 | 4138 | /* xgettext:c-format */ |
9911c0fc | 4139 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), |
c08bb8dd | 4140 | input_bfd, r_type, input_section); |
8da6118f | 4141 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 4142 | return FALSE; |
8da6118f | 4143 | } |
8d88c4ca | 4144 | |
d7921315 | 4145 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 4146 | || ABI_64_P (output_bfd)) |
d7921315 L |
4147 | howto = x86_64_elf_howto_table + r_type; |
4148 | else | |
4149 | howto = (x86_64_elf_howto_table | |
4150 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 4151 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
4152 | h = NULL; |
4153 | sym = NULL; | |
4154 | sec = NULL; | |
b34976b6 | 4155 | unresolved_reloc = FALSE; |
8d88c4ca | 4156 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
4157 | { |
4158 | sym = local_syms + r_symndx; | |
4159 | sec = local_sections[r_symndx]; | |
c434dee6 | 4160 | |
c25bc9fc L |
4161 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
4162 | &sec, rel); | |
1788fc08 | 4163 | st_size = sym->st_size; |
c25bc9fc L |
4164 | |
4165 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 4166 | if (!bfd_link_relocatable (info) |
351f65ca | 4167 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 4168 | { |
351f65ca L |
4169 | h = elf_x86_64_get_local_sym_hash (htab, input_bfd, |
4170 | rel, FALSE); | |
c25bc9fc L |
4171 | if (h == NULL) |
4172 | abort (); | |
4173 | ||
eed180f8 | 4174 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
4175 | h->root.u.def.value = sym->st_value; |
4176 | h->root.u.def.section = sec; | |
4177 | } | |
8da6118f | 4178 | } |
8d88c4ca | 4179 | else |
8da6118f | 4180 | { |
c9736ba0 | 4181 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 4182 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
c434dee6 | 4183 | |
b2a8e766 AM |
4184 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
4185 | r_symndx, symtab_hdr, sym_hashes, | |
4186 | h, sec, relocation, | |
62d887d4 | 4187 | unresolved_reloc, warned, ignored); |
1788fc08 | 4188 | st_size = h->size; |
8da6118f | 4189 | } |
ab96bf03 | 4190 | |
dbaa2011 | 4191 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
4192 | { |
4193 | _bfd_clear_contents (howto, input_bfd, input_section, | |
4194 | contents + rel->r_offset); | |
4195 | wrel->r_offset = rel->r_offset; | |
4196 | wrel->r_info = 0; | |
4197 | wrel->r_addend = 0; | |
4198 | ||
4199 | /* For ld -r, remove relocations in debug sections against | |
4200 | sections defined in discarded sections. Not done for | |
4201 | eh_frame editing code expects to be present. */ | |
4202 | if (bfd_link_relocatable (info) | |
4203 | && (input_section->flags & SEC_DEBUGGING)) | |
4204 | wrel--; | |
4205 | ||
4206 | continue; | |
4207 | } | |
ab96bf03 | 4208 | |
0e1862bb | 4209 | if (bfd_link_relocatable (info)) |
2d5da473 L |
4210 | { |
4211 | if (wrel != rel) | |
4212 | *wrel = *rel; | |
4213 | continue; | |
4214 | } | |
ab96bf03 | 4215 | |
1788fc08 | 4216 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 4217 | { |
1788fc08 L |
4218 | if (r_type == R_X86_64_64) |
4219 | { | |
4220 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
4221 | zero-extend it to 64bit if addend is zero. */ | |
4222 | r_type = R_X86_64_32; | |
4223 | memset (contents + rel->r_offset + 4, 0, 4); | |
4224 | } | |
4225 | else if (r_type == R_X86_64_SIZE64) | |
4226 | { | |
4227 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
4228 | zero-extend it to 64bit if addend is zero. */ | |
4229 | r_type = R_X86_64_SIZE32; | |
4230 | memset (contents + rel->r_offset + 4, 0, 4); | |
4231 | } | |
64d25c44 L |
4232 | } |
4233 | ||
0ff2b86e L |
4234 | eh = (struct elf_x86_64_link_hash_entry *) h; |
4235 | ||
cbe950e9 L |
4236 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
4237 | it here if it is defined in a non-shared object. */ | |
4238 | if (h != NULL | |
4239 | && h->type == STT_GNU_IFUNC | |
4240 | && h->def_regular) | |
4241 | { | |
cbe950e9 | 4242 | bfd_vma plt_index; |
4c544807 | 4243 | const char *name; |
cbe950e9 | 4244 | |
97dc35c8 L |
4245 | if ((input_section->flags & SEC_ALLOC) == 0) |
4246 | { | |
4247 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
4248 | sections because such sections are not SEC_ALLOC and | |
4249 | thus ld.so will not process them. */ | |
4250 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 4251 | continue; |
97dc35c8 L |
4252 | abort (); |
4253 | } | |
233cc9c1 L |
4254 | |
4255 | switch (r_type) | |
4256 | { | |
4257 | default: | |
4258 | break; | |
4259 | ||
4260 | case R_X86_64_GOTPCREL: | |
4261 | case R_X86_64_GOTPCRELX: | |
4262 | case R_X86_64_REX_GOTPCRELX: | |
4263 | case R_X86_64_GOTPCREL64: | |
4264 | base_got = htab->elf.sgot; | |
4265 | off = h->got.offset; | |
4266 | ||
4267 | if (base_got == NULL) | |
4268 | abort (); | |
4269 | ||
4270 | if (off == (bfd_vma) -1) | |
4271 | { | |
4272 | /* We can't use h->got.offset here to save state, or | |
4273 | even just remember the offset, as finish_dynamic_symbol | |
4274 | would use that as offset into .got. */ | |
4275 | ||
4276 | if (h->plt.offset == (bfd_vma) -1) | |
4277 | abort (); | |
4278 | ||
4279 | if (htab->elf.splt != NULL) | |
4280 | { | |
38b12349 L |
4281 | plt_index = (h->plt.offset / plt_entry_size |
4282 | - htab->plt.has_plt0); | |
233cc9c1 L |
4283 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
4284 | base_got = htab->elf.sgotplt; | |
4285 | } | |
4286 | else | |
4287 | { | |
4288 | plt_index = h->plt.offset / plt_entry_size; | |
4289 | off = plt_index * GOT_ENTRY_SIZE; | |
4290 | base_got = htab->elf.igotplt; | |
4291 | } | |
4292 | ||
4293 | if (h->dynindx == -1 | |
4294 | || h->forced_local | |
4295 | || info->symbolic) | |
4296 | { | |
4297 | /* This references the local defitionion. We must | |
4298 | initialize this entry in the global offset table. | |
4299 | Since the offset must always be a multiple of 8, | |
4300 | we use the least significant bit to record | |
4301 | whether we have initialized it already. | |
4302 | ||
4303 | When doing a dynamic link, we create a .rela.got | |
4304 | relocation entry to initialize the value. This | |
4305 | is done in the finish_dynamic_symbol routine. */ | |
4306 | if ((off & 1) != 0) | |
4307 | off &= ~1; | |
4308 | else | |
4309 | { | |
4310 | bfd_put_64 (output_bfd, relocation, | |
4311 | base_got->contents + off); | |
4312 | /* Note that this is harmless for the GOTPLT64 | |
4313 | case, as -1 | 1 still is -1. */ | |
4314 | h->got.offset |= 1; | |
4315 | } | |
4316 | } | |
4317 | } | |
4318 | ||
4319 | relocation = (base_got->output_section->vma | |
4320 | + base_got->output_offset + off); | |
4321 | ||
4322 | goto do_relocation; | |
4323 | } | |
4324 | ||
4325 | if (h->plt.offset == (bfd_vma) -1) | |
4326 | { | |
4327 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
4328 | if (r_type == htab->pointer_r_type | |
4329 | && (input_section->flags & SEC_CODE) == 0) | |
4330 | goto do_ifunc_pointer; | |
4331 | goto bad_ifunc_reloc; | |
4332 | } | |
cbe950e9 L |
4333 | |
4334 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
4335 | if (htab->elf.splt != NULL) |
4336 | { | |
f2c29a16 | 4337 | if (htab->plt_second != NULL) |
0ff2b86e | 4338 | { |
f2c29a16 L |
4339 | resolved_plt = htab->plt_second; |
4340 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
4341 | } |
4342 | else | |
4343 | { | |
4344 | resolved_plt = htab->elf.splt; | |
4345 | plt_offset = h->plt.offset; | |
4346 | } | |
4347 | } | |
4348 | else | |
4349 | { | |
4350 | resolved_plt = htab->elf.iplt; | |
4351 | plt_offset = h->plt.offset; | |
4352 | } | |
4353 | ||
4354 | relocation = (resolved_plt->output_section->vma | |
4355 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
4356 | |
4357 | switch (r_type) | |
4358 | { | |
4359 | default: | |
233cc9c1 | 4360 | bad_ifunc_reloc: |
4c544807 L |
4361 | if (h->root.root.string) |
4362 | name = h->root.root.string; | |
4363 | else | |
4364 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
4365 | NULL); | |
4eca0228 | 4366 | _bfd_error_handler |
695344c0 | 4367 | /* xgettext:c-format */ |
cbe950e9 | 4368 | (_("%B: relocation %s against STT_GNU_IFUNC " |
233cc9c1 L |
4369 | "symbol `%s' isn't supported"), input_bfd, |
4370 | howto->name, name); | |
cbe950e9 L |
4371 | bfd_set_error (bfd_error_bad_value); |
4372 | return FALSE; | |
4373 | ||
4374 | case R_X86_64_32S: | |
0e1862bb | 4375 | if (bfd_link_pic (info)) |
cbe950e9 | 4376 | abort (); |
710ab287 L |
4377 | goto do_relocation; |
4378 | ||
248775ba L |
4379 | case R_X86_64_32: |
4380 | if (ABI_64_P (output_bfd)) | |
4381 | goto do_relocation; | |
17672001 | 4382 | /* FALLTHROUGH */ |
eed180f8 | 4383 | case R_X86_64_64: |
233cc9c1 | 4384 | do_ifunc_pointer: |
710ab287 L |
4385 | if (rel->r_addend != 0) |
4386 | { | |
4c544807 L |
4387 | if (h->root.root.string) |
4388 | name = h->root.root.string; | |
4389 | else | |
4390 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
4391 | sym, NULL); | |
4eca0228 | 4392 | _bfd_error_handler |
695344c0 | 4393 | /* xgettext:c-format */ |
710ab287 L |
4394 | (_("%B: relocation %s against STT_GNU_IFUNC " |
4395 | "symbol `%s' has non-zero addend: %d"), | |
ef77d6af | 4396 | input_bfd, howto->name, name, rel->r_addend); |
710ab287 L |
4397 | bfd_set_error (bfd_error_bad_value); |
4398 | return FALSE; | |
4399 | } | |
4400 | ||
4401 | /* Generate dynamic relcoation only when there is a | |
233cc9c1 L |
4402 | non-GOT reference in a shared object or there is no |
4403 | PLT. */ | |
4404 | if ((bfd_link_pic (info) && h->non_got_ref) | |
4405 | || h->plt.offset == (bfd_vma) -1) | |
710ab287 L |
4406 | { |
4407 | Elf_Internal_Rela outrel; | |
710ab287 L |
4408 | asection *sreloc; |
4409 | ||
c25bc9fc L |
4410 | /* Need a dynamic relocation to get the real function |
4411 | address. */ | |
710ab287 L |
4412 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
4413 | info, | |
4414 | input_section, | |
4415 | rel->r_offset); | |
4416 | if (outrel.r_offset == (bfd_vma) -1 | |
4417 | || outrel.r_offset == (bfd_vma) -2) | |
4418 | abort (); | |
4419 | ||
4420 | outrel.r_offset += (input_section->output_section->vma | |
4421 | + input_section->output_offset); | |
4422 | ||
4423 | if (h->dynindx == -1 | |
44c4ea11 | 4424 | || h->forced_local |
0e1862bb | 4425 | || bfd_link_executable (info)) |
710ab287 | 4426 | { |
6322e5c5 L |
4427 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
4428 | h->root.root.string, | |
4429 | h->root.u.def.section->owner); | |
4430 | ||
710ab287 | 4431 | /* This symbol is resolved locally. */ |
56b8aada L |
4432 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
4433 | outrel.r_addend = (h->root.u.def.value | |
4434 | + h->root.u.def.section->output_section->vma | |
4435 | + h->root.u.def.section->output_offset); | |
710ab287 L |
4436 | } |
4437 | else | |
4438 | { | |
351f65ca | 4439 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
4440 | outrel.r_addend = 0; |
4441 | } | |
4442 | ||
233cc9c1 L |
4443 | /* Dynamic relocations are stored in |
4444 | 1. .rela.ifunc section in PIC object. | |
4445 | 2. .rela.got section in dynamic executable. | |
4446 | 3. .rela.iplt section in static executable. */ | |
4447 | if (bfd_link_pic (info)) | |
4448 | sreloc = htab->elf.irelifunc; | |
4449 | else if (htab->elf.splt != NULL) | |
4450 | sreloc = htab->elf.srelgot; | |
4451 | else | |
4452 | sreloc = htab->elf.irelplt; | |
351f65ca | 4453 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
4454 | |
4455 | /* If this reloc is against an external symbol, we | |
4456 | do not want to fiddle with the addend. Otherwise, | |
4457 | we need to include the symbol value so that it | |
4458 | becomes an addend for the dynamic reloc. For an | |
4459 | internal symbol, we have updated addend. */ | |
56b8aada | 4460 | continue; |
710ab287 | 4461 | } |
17672001 | 4462 | /* FALLTHROUGH */ |
cbe950e9 | 4463 | case R_X86_64_PC32: |
c3320543 | 4464 | case R_X86_64_PC32_BND: |
cbe950e9 L |
4465 | case R_X86_64_PC64: |
4466 | case R_X86_64_PLT32: | |
c3320543 | 4467 | case R_X86_64_PLT32_BND: |
cbe950e9 | 4468 | goto do_relocation; |
cbe950e9 L |
4469 | } |
4470 | } | |
4471 | ||
aec6b87e | 4472 | resolved_to_zero = (eh != NULL |
e62b9723 L |
4473 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
4474 | eh->has_got_reloc, | |
4475 | eh)); | |
aec6b87e | 4476 | |
70256ad8 AJ |
4477 | /* When generating a shared object, the relocations handled here are |
4478 | copied into the output file to be resolved at run time. */ | |
4479 | switch (r_type) | |
4480 | { | |
4481 | case R_X86_64_GOT32: | |
7b81dfbb | 4482 | case R_X86_64_GOT64: |
70256ad8 AJ |
4483 | /* Relocation is to the entry for this symbol in the global |
4484 | offset table. */ | |
70256ad8 | 4485 | case R_X86_64_GOTPCREL: |
56ceb5b5 L |
4486 | case R_X86_64_GOTPCRELX: |
4487 | case R_X86_64_REX_GOTPCRELX: | |
7b81dfbb AJ |
4488 | case R_X86_64_GOTPCREL64: |
4489 | /* Use global offset table entry as symbol value. */ | |
4490 | case R_X86_64_GOTPLT64: | |
553d1284 | 4491 | /* This is obsolete and treated the the same as GOT64. */ |
6de2ae4a | 4492 | base_got = htab->elf.sgot; |
7b81dfbb | 4493 | |
6de2ae4a | 4494 | if (htab->elf.sgot == NULL) |
c434dee6 | 4495 | abort (); |
053579d7 | 4496 | |
9e9821dd | 4497 | relative_reloc = FALSE; |
51e0a107 | 4498 | if (h != NULL) |
70256ad8 | 4499 | { |
b34976b6 | 4500 | bfd_boolean dyn; |
c434dee6 AJ |
4501 | |
4502 | off = h->got.offset; | |
7b81dfbb | 4503 | if (h->needs_plt |
eed180f8 | 4504 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
4505 | && off == (bfd_vma)-1) |
4506 | { | |
4507 | /* We can't use h->got.offset here to save | |
4508 | state, or even just remember the offset, as | |
4509 | finish_dynamic_symbol would use that as offset into | |
4510 | .got. */ | |
38b12349 L |
4511 | bfd_vma plt_index = (h->plt.offset / plt_entry_size |
4512 | - htab->plt.has_plt0); | |
7b81dfbb | 4513 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 4514 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
4515 | } |
4516 | ||
c434dee6 | 4517 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 4518 | |
0e1862bb L |
4519 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
4520 | || (bfd_link_pic (info) | |
27482721 | 4521 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
4522 | || (ELF_ST_VISIBILITY (h->other) |
4523 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
4524 | { |
4525 | /* This is actually a static link, or it is a -Bsymbolic | |
4526 | link and the symbol is defined locally, or the symbol | |
407443a3 | 4527 | was forced to be local because of a version file. We |
51e0a107 JH |
4528 | must initialize this entry in the global offset table. |
4529 | Since the offset must always be a multiple of 8, we | |
4530 | use the least significant bit to record whether we | |
4531 | have initialized it already. | |
4532 | ||
4533 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
4534 | relocation entry to initialize the value. This is |
4535 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
4536 | if ((off & 1) != 0) |
4537 | off &= ~1; | |
4538 | else | |
4539 | { | |
4540 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
4541 | base_got->contents + off); |
4542 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 4543 | as -1 | 1 still is -1. */ |
51e0a107 | 4544 | h->got.offset |= 1; |
9e9821dd L |
4545 | |
4546 | if (h->dynindx == -1 | |
4547 | && !h->forced_local | |
4548 | && h->root.type != bfd_link_hash_undefweak | |
4549 | && bfd_link_pic (info)) | |
4550 | { | |
4551 | /* If this symbol isn't dynamic in PIC, | |
4552 | generate R_X86_64_RELATIVE here. */ | |
4553 | eh->no_finish_dynamic_symbol = 1; | |
4554 | relative_reloc = TRUE; | |
4555 | } | |
51e0a107 JH |
4556 | } |
4557 | } | |
053579d7 | 4558 | else |
b34976b6 | 4559 | unresolved_reloc = FALSE; |
70256ad8 | 4560 | } |
51e0a107 JH |
4561 | else |
4562 | { | |
c434dee6 AJ |
4563 | if (local_got_offsets == NULL) |
4564 | abort (); | |
51e0a107 JH |
4565 | |
4566 | off = local_got_offsets[r_symndx]; | |
4567 | ||
4568 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
4569 | the least significant bit to record whether we have |
4570 | already generated the necessary reloc. */ | |
51e0a107 JH |
4571 | if ((off & 1) != 0) |
4572 | off &= ~1; | |
4573 | else | |
4574 | { | |
c434dee6 | 4575 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 4576 | base_got->contents + off); |
9e9821dd | 4577 | local_got_offsets[r_symndx] |= 1; |
51e0a107 | 4578 | |
0e1862bb | 4579 | if (bfd_link_pic (info)) |
9e9821dd | 4580 | relative_reloc = TRUE; |
51e0a107 | 4581 | } |
51e0a107 | 4582 | } |
6a2bda3f | 4583 | |
9e9821dd L |
4584 | if (relative_reloc) |
4585 | { | |
4586 | asection *s; | |
4587 | Elf_Internal_Rela outrel; | |
4588 | ||
4589 | /* We need to generate a R_X86_64_RELATIVE reloc | |
4590 | for the dynamic linker. */ | |
4591 | s = htab->elf.srelgot; | |
4592 | if (s == NULL) | |
4593 | abort (); | |
4594 | ||
4595 | outrel.r_offset = (base_got->output_section->vma | |
4596 | + base_got->output_offset | |
4597 | + off); | |
4598 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); | |
4599 | outrel.r_addend = relocation; | |
4600 | elf_append_rela (output_bfd, s, &outrel); | |
4601 | } | |
4602 | ||
c434dee6 AJ |
4603 | if (off >= (bfd_vma) -2) |
4604 | abort (); | |
4605 | ||
7b81dfbb AJ |
4606 | relocation = base_got->output_section->vma |
4607 | + base_got->output_offset + off; | |
56ceb5b5 L |
4608 | if (r_type != R_X86_64_GOTPCREL |
4609 | && r_type != R_X86_64_GOTPCRELX | |
4610 | && r_type != R_X86_64_REX_GOTPCRELX | |
4611 | && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
4612 | relocation -= htab->elf.sgotplt->output_section->vma |
4613 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 4614 | |
70256ad8 AJ |
4615 | break; |
4616 | ||
d6ab8113 JB |
4617 | case R_X86_64_GOTOFF64: |
4618 | /* Relocation is relative to the start of the global offset | |
4619 | table. */ | |
4620 | ||
3d949995 L |
4621 | /* Check to make sure it isn't a protected function or data |
4622 | symbol for shared library since it may not be local when | |
e3c0e327 L |
4623 | used as function address or with copy relocation. We also |
4624 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 4625 | if (bfd_link_pic (info) && h) |
d6ab8113 | 4626 | { |
e3c0e327 L |
4627 | if (!h->def_regular) |
4628 | { | |
4629 | const char *v; | |
4630 | ||
4631 | switch (ELF_ST_VISIBILITY (h->other)) | |
4632 | { | |
4633 | case STV_HIDDEN: | |
4634 | v = _("hidden symbol"); | |
4635 | break; | |
4636 | case STV_INTERNAL: | |
4637 | v = _("internal symbol"); | |
4638 | break; | |
4639 | case STV_PROTECTED: | |
4640 | v = _("protected symbol"); | |
4641 | break; | |
4642 | default: | |
4643 | v = _("symbol"); | |
4644 | break; | |
4645 | } | |
4646 | ||
4eca0228 | 4647 | _bfd_error_handler |
695344c0 | 4648 | /* xgettext:c-format */ |
63a5468a AM |
4649 | (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s" |
4650 | " `%s' can not be used when making a shared object"), | |
e3c0e327 L |
4651 | input_bfd, v, h->root.root.string); |
4652 | bfd_set_error (bfd_error_bad_value); | |
4653 | return FALSE; | |
4654 | } | |
0e1862bb | 4655 | else if (!bfd_link_executable (info) |
e3c0e327 L |
4656 | && !SYMBOL_REFERENCES_LOCAL (info, h) |
4657 | && (h->type == STT_FUNC | |
4658 | || h->type == STT_OBJECT) | |
4659 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
4660 | { | |
4eca0228 | 4661 | _bfd_error_handler |
695344c0 | 4662 | /* xgettext:c-format */ |
63a5468a AM |
4663 | (_("%B: relocation R_X86_64_GOTOFF64 against protected %s" |
4664 | " `%s' can not be used when making a shared object"), | |
e3c0e327 L |
4665 | input_bfd, |
4666 | h->type == STT_FUNC ? "function" : "data", | |
4667 | h->root.root.string); | |
4668 | bfd_set_error (bfd_error_bad_value); | |
d6ab8113 | 4669 | return FALSE; |
e3c0e327 | 4670 | } |
d6ab8113 JB |
4671 | } |
4672 | ||
4673 | /* Note that sgot is not involved in this | |
4674 | calculation. We always want the start of .got.plt. If we | |
4675 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
4676 | permitted by the ABI, we might have to change this | |
4677 | calculation. */ | |
6de2ae4a L |
4678 | relocation -= htab->elf.sgotplt->output_section->vma |
4679 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4680 | break; |
4681 | ||
4682 | case R_X86_64_GOTPC32: | |
7b81dfbb | 4683 | case R_X86_64_GOTPC64: |
d6ab8113 | 4684 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
4685 | relocation = htab->elf.sgotplt->output_section->vma |
4686 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4687 | unresolved_reloc = FALSE; |
4688 | break; | |
7b81dfbb AJ |
4689 | |
4690 | case R_X86_64_PLTOFF64: | |
4691 | /* Relocation is PLT entry relative to GOT. For local | |
4692 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 4693 | if (h != NULL |
7b81dfbb | 4694 | /* See PLT32 handling. */ |
9d734efa L |
4695 | && (h->plt.offset != (bfd_vma) -1 |
4696 | || eh->plt_got.offset != (bfd_vma) -1) | |
6de2ae4a | 4697 | && htab->elf.splt != NULL) |
7b81dfbb | 4698 | { |
9d734efa L |
4699 | if (eh->plt_got.offset != (bfd_vma) -1) |
4700 | { | |
4701 | /* Use the GOT PLT. */ | |
4702 | resolved_plt = htab->plt_got; | |
4703 | plt_offset = eh->plt_got.offset; | |
4704 | } | |
f2c29a16 | 4705 | else if (htab->plt_second != NULL) |
0ff2b86e | 4706 | { |
f2c29a16 L |
4707 | resolved_plt = htab->plt_second; |
4708 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
4709 | } |
4710 | else | |
4711 | { | |
4712 | resolved_plt = htab->elf.splt; | |
4713 | plt_offset = h->plt.offset; | |
4714 | } | |
4715 | ||
4716 | relocation = (resolved_plt->output_section->vma | |
4717 | + resolved_plt->output_offset | |
4718 | + plt_offset); | |
7b81dfbb AJ |
4719 | unresolved_reloc = FALSE; |
4720 | } | |
4721 | ||
6de2ae4a L |
4722 | relocation -= htab->elf.sgotplt->output_section->vma |
4723 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 4724 | break; |
d6ab8113 | 4725 | |
70256ad8 | 4726 | case R_X86_64_PLT32: |
c3320543 | 4727 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
4728 | /* Relocation is to the entry for this symbol in the |
4729 | procedure linkage table. */ | |
4730 | ||
4731 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 4732 | without using the procedure linkage table. */ |
70256ad8 AJ |
4733 | if (h == NULL) |
4734 | break; | |
4735 | ||
dd7e64d4 L |
4736 | if ((h->plt.offset == (bfd_vma) -1 |
4737 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 4738 | || htab->elf.splt == NULL) |
70256ad8 AJ |
4739 | { |
4740 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
4741 | happens when statically linking PIC code, or when |
4742 | using -Bsymbolic. */ | |
70256ad8 AJ |
4743 | break; |
4744 | } | |
4745 | ||
dd7e64d4 | 4746 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 4747 | { |
f2c29a16 | 4748 | if (htab->plt_second != NULL) |
dd7e64d4 | 4749 | { |
f2c29a16 L |
4750 | resolved_plt = htab->plt_second; |
4751 | plt_offset = eh->plt_second.offset; | |
dd7e64d4 L |
4752 | } |
4753 | else | |
4754 | { | |
4755 | resolved_plt = htab->elf.splt; | |
4756 | plt_offset = h->plt.offset; | |
4757 | } | |
0ff2b86e L |
4758 | } |
4759 | else | |
4760 | { | |
dd7e64d4 L |
4761 | /* Use the GOT PLT. */ |
4762 | resolved_plt = htab->plt_got; | |
4763 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
4764 | } |
4765 | ||
4766 | relocation = (resolved_plt->output_section->vma | |
4767 | + resolved_plt->output_offset | |
4768 | + plt_offset); | |
b34976b6 | 4769 | unresolved_reloc = FALSE; |
70256ad8 AJ |
4770 | break; |
4771 | ||
1788fc08 L |
4772 | case R_X86_64_SIZE32: |
4773 | case R_X86_64_SIZE64: | |
1788fc08 L |
4774 | /* Set to symbol size. */ |
4775 | relocation = st_size; | |
4776 | goto direct; | |
4777 | ||
fd8ab9e5 AJ |
4778 | case R_X86_64_PC8: |
4779 | case R_X86_64_PC16: | |
4780 | case R_X86_64_PC32: | |
c3320543 | 4781 | case R_X86_64_PC32_BND: |
6333bc0d | 4782 | /* Don't complain about -fPIC if the symbol is undefined when |
aec6b87e L |
4783 | building executable unless it is unresolved weak symbol. */ |
4784 | if ((input_section->flags & SEC_ALLOC) != 0 | |
90f487df | 4785 | && (input_section->flags & SEC_READONLY) != 0 |
6333bc0d | 4786 | && h != NULL |
aec6b87e L |
4787 | && ((bfd_link_executable (info) |
4788 | && h->root.type == bfd_link_hash_undefweak | |
4789 | && !resolved_to_zero) | |
4790 | || (bfd_link_pic (info) | |
4791 | && !(bfd_link_pie (info) | |
4792 | && h->root.type == bfd_link_hash_undefined)))) | |
6610a52d | 4793 | { |
41bed6dd L |
4794 | bfd_boolean fail = FALSE; |
4795 | bfd_boolean branch | |
c3320543 L |
4796 | = ((r_type == R_X86_64_PC32 |
4797 | || r_type == R_X86_64_PC32_BND) | |
41bed6dd L |
4798 | && is_32bit_relative_branch (contents, rel->r_offset)); |
4799 | ||
4800 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
4801 | { | |
4802 | /* Symbol is referenced locally. Make sure it is | |
4803 | defined locally or for a branch. */ | |
8170f769 L |
4804 | fail = (!(h->def_regular || ELF_COMMON_DEF_P (h)) |
4805 | && !branch); | |
41bed6dd | 4806 | } |
aec6b87e | 4807 | else if (!(bfd_link_pie (info) |
bc696fd5 | 4808 | && (h->needs_copy || eh->needs_copy))) |
41bed6dd | 4809 | { |
9a926d55 L |
4810 | /* Symbol doesn't need copy reloc and isn't referenced |
4811 | locally. We only allow branch to symbol with | |
4812 | non-default visibility. */ | |
41bed6dd L |
4813 | fail = (!branch |
4814 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
4815 | } | |
4816 | ||
4817 | if (fail) | |
338c190a L |
4818 | return elf_x86_64_need_pic (input_bfd, input_section, |
4819 | h, NULL, NULL, howto); | |
6610a52d L |
4820 | } |
4821 | /* Fall through. */ | |
4822 | ||
70256ad8 AJ |
4823 | case R_X86_64_8: |
4824 | case R_X86_64_16: | |
4825 | case R_X86_64_32: | |
d6ab8113 | 4826 | case R_X86_64_PC64: |
6b3db546 | 4827 | case R_X86_64_64: |
80643fbc | 4828 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 4829 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 4830 | |
1788fc08 | 4831 | direct: |
b1e24c02 | 4832 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
4833 | break; |
4834 | ||
9a926d55 | 4835 | /* Don't copy a pc-relative relocation into the output file |
6333bc0d | 4836 | if the symbol needs copy reloc or the symbol is undefined |
04ebc307 | 4837 | when building executable. Copy dynamic function pointer |
aec6b87e L |
4838 | relocations. Don't generate dynamic relocations against |
4839 | resolved undefined weak symbols in PIE. */ | |
0e1862bb | 4840 | if ((bfd_link_pic (info) |
aec6b87e | 4841 | && !(bfd_link_pie (info) |
fd9edc90 | 4842 | && h != NULL |
6333bc0d L |
4843 | && (h->needs_copy |
4844 | || eh->needs_copy | |
4845 | || h->root.type == bfd_link_hash_undefined) | |
d8457a04 L |
4846 | && (IS_X86_64_PCREL_TYPE (r_type) |
4847 | || r_type == R_X86_64_SIZE32 | |
4848 | || r_type == R_X86_64_SIZE64)) | |
4bc6e03a | 4849 | && (h == NULL |
aec6b87e L |
4850 | || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
4851 | && !resolved_to_zero) | |
4852 | || h->root.type != bfd_link_hash_undefweak)) | |
1788fc08 L |
4853 | && ((! IS_X86_64_PCREL_TYPE (r_type) |
4854 | && r_type != R_X86_64_SIZE32 | |
4855 | && r_type != R_X86_64_SIZE64) | |
d8045f23 | 4856 | || ! SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c | 4857 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 4858 | && !bfd_link_pic (info) |
c434dee6 AJ |
4859 | && h != NULL |
4860 | && h->dynindx != -1 | |
aec6b87e L |
4861 | && (!h->non_got_ref |
4862 | || eh->func_pointer_refcount > 0 | |
4863 | || (h->root.type == bfd_link_hash_undefweak | |
4864 | && !resolved_to_zero)) | |
bae420ef L |
4865 | && ((h->def_dynamic && !h->def_regular) |
4866 | /* Undefined weak symbol is bound locally when | |
4867 | PIC is false. */ | |
0f88be7a | 4868 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
4869 | { |
4870 | Elf_Internal_Rela outrel; | |
b34976b6 | 4871 | bfd_boolean skip, relocate; |
c434dee6 | 4872 | asection *sreloc; |
70256ad8 AJ |
4873 | |
4874 | /* When generating a shared object, these relocations | |
4875 | are copied into the output file to be resolved at run | |
407443a3 | 4876 | time. */ |
b34976b6 AM |
4877 | skip = FALSE; |
4878 | relocate = FALSE; | |
70256ad8 | 4879 | |
c629eae0 JJ |
4880 | outrel.r_offset = |
4881 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 4882 | rel->r_offset); |
c629eae0 | 4883 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 4884 | skip = TRUE; |
0fb19cbc | 4885 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 4886 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
4887 | |
4888 | outrel.r_offset += (input_section->output_section->vma | |
4889 | + input_section->output_offset); | |
4890 | ||
4891 | if (skip) | |
0bb2d96a | 4892 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 4893 | |
fd8ab9e5 AJ |
4894 | /* h->dynindx may be -1 if this symbol was marked to |
4895 | become local. */ | |
4896 | else if (h != NULL | |
c434dee6 | 4897 | && h->dynindx != -1 |
d8045f23 | 4898 | && (IS_X86_64_PCREL_TYPE (r_type) |
4e0c91e4 L |
4899 | || !(bfd_link_executable (info) |
4900 | || SYMBOLIC_BIND (info, h)) | |
d8045f23 | 4901 | || ! h->def_regular)) |
70256ad8 | 4902 | { |
351f65ca | 4903 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 4904 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
4905 | } |
4906 | else | |
4907 | { | |
4c10bbaa L |
4908 | /* This symbol is local, or marked to become local. |
4909 | When relocation overflow check is disabled, we | |
4910 | convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
4911 | if (r_type == htab->pointer_r_type | |
4912 | || (r_type == R_X86_64_32 | |
4913 | && info->no_reloc_overflow_check)) | |
607c0e09 | 4914 | { |
b34976b6 | 4915 | relocate = TRUE; |
351f65ca | 4916 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
4917 | outrel.r_addend = relocation + rel->r_addend; |
4918 | } | |
64d25c44 L |
4919 | else if (r_type == R_X86_64_64 |
4920 | && !ABI_64_P (output_bfd)) | |
4921 | { | |
4922 | relocate = TRUE; | |
4923 | outrel.r_info = htab->r_info (0, | |
4924 | R_X86_64_RELATIVE64); | |
4925 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
4926 | /* Check addend overflow. */ |
4927 | if ((outrel.r_addend & 0x80000000) | |
4928 | != (rel->r_addend & 0x80000000)) | |
4929 | { | |
4930 | const char *name; | |
268a8d3a | 4931 | int addend = rel->r_addend; |
8cf0d2dd L |
4932 | if (h && h->root.root.string) |
4933 | name = h->root.root.string; | |
4934 | else | |
4935 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
4936 | sym, NULL); | |
6f2c9068 | 4937 | if (addend < 0) |
4eca0228 | 4938 | _bfd_error_handler |
695344c0 | 4939 | /* xgettext:c-format */ |
268a8d3a | 4940 | (_("%B: addend -0x%x in relocation %s against " |
6f2c9068 L |
4941 | "symbol `%s' at 0x%lx in section `%A' is " |
4942 | "out of range"), | |
c08bb8dd AM |
4943 | input_bfd, addend, howto->name, name, |
4944 | (unsigned long) rel->r_offset, input_section); | |
6f2c9068 | 4945 | else |
4eca0228 | 4946 | _bfd_error_handler |
695344c0 | 4947 | /* xgettext:c-format */ |
268a8d3a | 4948 | (_("%B: addend 0x%x in relocation %s against " |
6f2c9068 L |
4949 | "symbol `%s' at 0x%lx in section `%A' is " |
4950 | "out of range"), | |
c08bb8dd AM |
4951 | input_bfd, addend, howto->name, name, |
4952 | (unsigned long) rel->r_offset, input_section); | |
8cf0d2dd L |
4953 | bfd_set_error (bfd_error_bad_value); |
4954 | return FALSE; | |
4955 | } | |
64d25c44 | 4956 | } |
607c0e09 AS |
4957 | else |
4958 | { | |
4959 | long sindx; | |
4960 | ||
8517fae7 | 4961 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
4962 | sindx = 0; |
4963 | else if (sec == NULL || sec->owner == NULL) | |
4964 | { | |
4965 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 4966 | return FALSE; |
607c0e09 AS |
4967 | } |
4968 | else | |
4969 | { | |
4970 | asection *osec; | |
4971 | ||
74541ad4 AM |
4972 | /* We are turning this relocation into one |
4973 | against a section symbol. It would be | |
4974 | proper to subtract the symbol's value, | |
4975 | osec->vma, from the emitted reloc addend, | |
4976 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
4977 | osec = sec->output_section; |
4978 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
4979 | if (sindx == 0) |
4980 | { | |
4981 | asection *oi = htab->elf.text_index_section; | |
4982 | sindx = elf_section_data (oi)->dynindx; | |
4983 | } | |
4984 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
4985 | } |
4986 | ||
351f65ca | 4987 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
4988 | outrel.r_addend = relocation + rel->r_addend; |
4989 | } | |
70256ad8 AJ |
4990 | } |
4991 | ||
cbe950e9 | 4992 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 4993 | |
62d78908 L |
4994 | if (sreloc == NULL || sreloc->contents == NULL) |
4995 | { | |
4996 | r = bfd_reloc_notsupported; | |
4997 | goto check_relocation_error; | |
4998 | } | |
c434dee6 | 4999 | |
351f65ca | 5000 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
5001 | |
5002 | /* If this reloc is against an external symbol, we do | |
5003 | not want to fiddle with the addend. Otherwise, we | |
5004 | need to include the symbol value so that it becomes | |
5005 | an addend for the dynamic reloc. */ | |
0f88be7a | 5006 | if (! relocate) |
70256ad8 AJ |
5007 | continue; |
5008 | } | |
5009 | ||
5010 | break; | |
5011 | ||
bffbf940 | 5012 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
5013 | case R_X86_64_GOTPC32_TLSDESC: |
5014 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 5015 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
5016 | tls_type = GOT_UNKNOWN; |
5017 | if (h == NULL && local_got_offsets) | |
351f65ca | 5018 | tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 5019 | else if (h != NULL) |
351f65ca | 5020 | tls_type = elf_x86_64_hash_entry (h)->tls_type; |
142411ca | 5021 | |
351f65ca L |
5022 | if (! elf_x86_64_tls_transition (info, input_bfd, |
5023 | input_section, contents, | |
5024 | symtab_hdr, sym_hashes, | |
5025 | &r_type, tls_type, rel, | |
bedfd056 | 5026 | relend, h, r_symndx, TRUE)) |
534a31f6 | 5027 | return FALSE; |
bffbf940 JJ |
5028 | |
5029 | if (r_type == R_X86_64_TPOFF32) | |
5030 | { | |
142411ca L |
5031 | bfd_vma roff = rel->r_offset; |
5032 | ||
bffbf940 | 5033 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 5034 | |
351f65ca | 5035 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 5036 | { |
52bc799a | 5037 | /* GD->LE transition. For 64bit, change |
e2cbcd91 L |
5038 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
5039 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5040 | or | |
5041 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
5042 | .byte 0x66; rex64 | |
5043 | call *__tls_get_addr@GOTPCREL(%rip) | |
5044 | which may be converted to | |
5045 | addr32 call __tls_get_addr | |
52bc799a | 5046 | into: |
e2cbcd91 L |
5047 | movq %fs:0, %rax |
5048 | leaq foo@tpoff(%rax), %rax | |
52bc799a | 5049 | For 32bit, change |
e2cbcd91 L |
5050 | leaq foo@tlsgd(%rip), %rdi |
5051 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5052 | or | |
5053 | leaq foo@tlsgd(%rip), %rdi | |
5054 | .byte 0x66; rex64 | |
5055 | call *__tls_get_addr@GOTPCREL(%rip) | |
5056 | which may be converted to | |
5057 | addr32 call __tls_get_addr | |
52bc799a | 5058 | into: |
e2cbcd91 L |
5059 | movl %fs:0, %eax |
5060 | leaq foo@tpoff(%rax), %rax | |
5c98a14e | 5061 | For largepic, change: |
e2cbcd91 L |
5062 | leaq foo@tlsgd(%rip), %rdi |
5063 | movabsq $__tls_get_addr@pltoff, %rax | |
5064 | addq %r15, %rax | |
5065 | call *%rax | |
5c98a14e | 5066 | into: |
e2cbcd91 L |
5067 | movq %fs:0, %rax |
5068 | leaq foo@tpoff(%rax), %rax | |
5069 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 5070 | int largepic = 0; |
e2cbcd91 | 5071 | if (ABI_64_P (output_bfd)) |
5c98a14e | 5072 | { |
e2cbcd91 L |
5073 | if (contents[roff + 5] == 0xb8) |
5074 | { | |
5075 | memcpy (contents + roff - 3, | |
5076 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
5077 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
5078 | largepic = 1; | |
5079 | } | |
5080 | else | |
5081 | memcpy (contents + roff - 4, | |
5082 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
5083 | 16); | |
5c98a14e | 5084 | } |
52bc799a L |
5085 | else |
5086 | memcpy (contents + roff - 3, | |
5087 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
5088 | 15); | |
eb4ff4d6 | 5089 | bfd_put_32 (output_bfd, |
351f65ca | 5090 | elf_x86_64_tpoff (info, relocation), |
5c98a14e | 5091 | contents + roff + 8 + largepic); |
e2cbcd91 L |
5092 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, |
5093 | R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */ | |
bffbf940 | 5094 | rel++; |
60f2e42e | 5095 | wrel++; |
bffbf940 JJ |
5096 | continue; |
5097 | } | |
351f65ca | 5098 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
5099 | { |
5100 | /* GDesc -> LE transition. | |
5101 | It's originally something like: | |
5102 | leaq x@tlsdesc(%rip), %rax | |
5103 | ||
5104 | Change it to: | |
c9736ba0 | 5105 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 5106 | |
c9736ba0 | 5107 | unsigned int val, type; |
67a4f2b7 | 5108 | |
67a4f2b7 | 5109 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 5110 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
5111 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
5112 | contents + roff - 3); | |
5113 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
5114 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
5115 | contents + roff - 1); | |
eb4ff4d6 | 5116 | bfd_put_32 (output_bfd, |
351f65ca | 5117 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
5118 | contents + roff); |
5119 | continue; | |
5120 | } | |
351f65ca | 5121 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
5122 | { |
5123 | /* GDesc -> LE transition. | |
5124 | It's originally: | |
5125 | call *(%rax) | |
5126 | Turn it into: | |
142411ca | 5127 | xchg %ax,%ax. */ |
10efb593 | 5128 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
5129 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
5130 | continue; | |
5131 | } | |
351f65ca | 5132 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 5133 | { |
bffbf940 | 5134 | /* IE->LE transition: |
cf61b747 | 5135 | For 64bit, originally it can be one of: |
bffbf940 JJ |
5136 | movq foo@gottpoff(%rip), %reg |
5137 | addq foo@gottpoff(%rip), %reg | |
5138 | We change it into: | |
5139 | movq $foo, %reg | |
5140 | leaq foo(%reg), %reg | |
cf61b747 L |
5141 | addq $foo, %reg. |
5142 | For 32bit, originally it can be one of: | |
5143 | movq foo@gottpoff(%rip), %reg | |
5144 | addl foo@gottpoff(%rip), %reg | |
5145 | We change it into: | |
5146 | movq $foo, %reg | |
5147 | leal foo(%reg), %reg | |
5148 | addl $foo, %reg. */ | |
142411ca L |
5149 | |
5150 | unsigned int val, type, reg; | |
5151 | ||
cf61b747 L |
5152 | if (roff >= 3) |
5153 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
5154 | else | |
5155 | val = 0; | |
142411ca L |
5156 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
5157 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 5158 | reg >>= 3; |
bffbf940 JJ |
5159 | if (type == 0x8b) |
5160 | { | |
5161 | /* movq */ | |
5162 | if (val == 0x4c) | |
5163 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 5164 | contents + roff - 3); |
4a4c5f25 L |
5165 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5166 | bfd_put_8 (output_bfd, 0x41, | |
5167 | contents + roff - 3); | |
bffbf940 | 5168 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 5169 | contents + roff - 2); |
bffbf940 | 5170 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 5171 | contents + roff - 1); |
bffbf940 JJ |
5172 | } |
5173 | else if (reg == 4) | |
5174 | { | |
cf61b747 L |
5175 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
5176 | is special */ | |
bffbf940 JJ |
5177 | if (val == 0x4c) |
5178 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 5179 | contents + roff - 3); |
4a4c5f25 L |
5180 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5181 | bfd_put_8 (output_bfd, 0x41, | |
5182 | contents + roff - 3); | |
bffbf940 | 5183 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 5184 | contents + roff - 2); |
bffbf940 | 5185 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 5186 | contents + roff - 1); |
bffbf940 JJ |
5187 | } |
5188 | else | |
5189 | { | |
cf61b747 | 5190 | /* addq/addl -> leaq/leal */ |
bffbf940 JJ |
5191 | if (val == 0x4c) |
5192 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 5193 | contents + roff - 3); |
4a4c5f25 L |
5194 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
5195 | bfd_put_8 (output_bfd, 0x45, | |
5196 | contents + roff - 3); | |
bffbf940 | 5197 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 5198 | contents + roff - 2); |
bffbf940 | 5199 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 5200 | contents + roff - 1); |
bffbf940 | 5201 | } |
eb4ff4d6 | 5202 | bfd_put_32 (output_bfd, |
351f65ca | 5203 | elf_x86_64_tpoff (info, relocation), |
142411ca | 5204 | contents + roff); |
bffbf940 JJ |
5205 | continue; |
5206 | } | |
142411ca L |
5207 | else |
5208 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
5209 | } |
5210 | ||
6de2ae4a | 5211 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
5212 | abort (); |
5213 | ||
5214 | if (h != NULL) | |
67a4f2b7 AO |
5215 | { |
5216 | off = h->got.offset; | |
351f65ca | 5217 | offplt = elf_x86_64_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 5218 | } |
bffbf940 JJ |
5219 | else |
5220 | { | |
5221 | if (local_got_offsets == NULL) | |
5222 | abort (); | |
5223 | ||
5224 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 5225 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
5226 | } |
5227 | ||
5228 | if ((off & 1) != 0) | |
5229 | off &= ~1; | |
26e41594 | 5230 | else |
bffbf940 JJ |
5231 | { |
5232 | Elf_Internal_Rela outrel; | |
bffbf940 | 5233 | int dr_type, indx; |
67a4f2b7 | 5234 | asection *sreloc; |
bffbf940 | 5235 | |
6de2ae4a | 5236 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
5237 | abort (); |
5238 | ||
67a4f2b7 AO |
5239 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
5240 | ||
5241 | if (GOT_TLS_GDESC_P (tls_type)) | |
5242 | { | |
351f65ca | 5243 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 5244 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
5245 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
5246 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
5247 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
5248 | + offplt |
5249 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 5250 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 5251 | if (indx == 0) |
351f65ca | 5252 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
67a4f2b7 AO |
5253 | else |
5254 | outrel.r_addend = 0; | |
351f65ca | 5255 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
5256 | } |
5257 | ||
6de2ae4a | 5258 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 5259 | |
6de2ae4a L |
5260 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5261 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 5262 | |
67a4f2b7 | 5263 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 5264 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
5265 | else if (GOT_TLS_GDESC_P (tls_type)) |
5266 | goto dr_done; | |
bffbf940 JJ |
5267 | else |
5268 | dr_type = R_X86_64_TPOFF64; | |
5269 | ||
6de2ae4a | 5270 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 5271 | outrel.r_addend = 0; |
67a4f2b7 AO |
5272 | if ((dr_type == R_X86_64_TPOFF64 |
5273 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
351f65ca L |
5274 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
5275 | outrel.r_info = htab->r_info (indx, dr_type); | |
bffbf940 | 5276 | |
351f65ca | 5277 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 5278 | |
67a4f2b7 | 5279 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
5280 | { |
5281 | if (indx == 0) | |
5282 | { | |
d40d037c | 5283 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 5284 | bfd_put_64 (output_bfd, |
351f65ca | 5285 | relocation - elf_x86_64_dtpoff_base (info), |
6de2ae4a | 5286 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
5287 | } |
5288 | else | |
5289 | { | |
5290 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5291 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5292 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
5293 | R_X86_64_DTPOFF64); |
5294 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 5295 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 5296 | &outrel); |
bffbf940 JJ |
5297 | } |
5298 | } | |
5299 | ||
67a4f2b7 | 5300 | dr_done: |
bffbf940 JJ |
5301 | if (h != NULL) |
5302 | h->got.offset |= 1; | |
5303 | else | |
5304 | local_got_offsets[r_symndx] |= 1; | |
5305 | } | |
5306 | ||
67a4f2b7 AO |
5307 | if (off >= (bfd_vma) -2 |
5308 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 5309 | abort (); |
351f65ca | 5310 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 5311 | { |
67a4f2b7 AO |
5312 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
5313 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
5314 | relocation = htab->elf.sgotplt->output_section->vma |
5315 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
5316 | + offplt + htab->sgotplt_jump_table_size; |
5317 | else | |
6de2ae4a L |
5318 | relocation = htab->elf.sgot->output_section->vma |
5319 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5320 | unresolved_reloc = FALSE; |
bffbf940 | 5321 | } |
142411ca | 5322 | else |
67a4f2b7 | 5323 | { |
142411ca | 5324 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 5325 | |
351f65ca | 5326 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 5327 | { |
52bc799a | 5328 | /* GD->IE transition. For 64bit, change |
e2cbcd91 L |
5329 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
5330 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5331 | or | |
5332 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
5333 | .byte 0x66; rex64 | |
5334 | call *__tls_get_addr@GOTPCREL(%rip | |
5335 | which may be converted to | |
5336 | addr32 call __tls_get_addr | |
52bc799a | 5337 | into: |
e2cbcd91 L |
5338 | movq %fs:0, %rax |
5339 | addq foo@gottpoff(%rip), %rax | |
52bc799a | 5340 | For 32bit, change |
e2cbcd91 L |
5341 | leaq foo@tlsgd(%rip), %rdi |
5342 | .word 0x6666; rex64; call __tls_get_addr@PLT | |
5343 | or | |
5344 | leaq foo@tlsgd(%rip), %rdi | |
5345 | .byte 0x66; rex64; | |
5346 | call *__tls_get_addr@GOTPCREL(%rip) | |
5347 | which may be converted to | |
5348 | addr32 call __tls_get_addr | |
52bc799a | 5349 | into: |
e2cbcd91 L |
5350 | movl %fs:0, %eax |
5351 | addq foo@gottpoff(%rip), %rax | |
5c98a14e | 5352 | For largepic, change: |
e2cbcd91 L |
5353 | leaq foo@tlsgd(%rip), %rdi |
5354 | movabsq $__tls_get_addr@pltoff, %rax | |
5355 | addq %r15, %rax | |
5356 | call *%rax | |
5c98a14e | 5357 | into: |
e2cbcd91 L |
5358 | movq %fs:0, %rax |
5359 | addq foo@gottpoff(%rax), %rax | |
5360 | nopw 0x0(%rax,%rax,1) */ | |
5c98a14e | 5361 | int largepic = 0; |
e2cbcd91 | 5362 | if (ABI_64_P (output_bfd)) |
5c98a14e | 5363 | { |
e2cbcd91 L |
5364 | if (contents[roff + 5] == 0xb8) |
5365 | { | |
5366 | memcpy (contents + roff - 3, | |
5367 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
5368 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
5369 | largepic = 1; | |
5370 | } | |
5371 | else | |
5372 | memcpy (contents + roff - 4, | |
5373 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
5374 | 16); | |
5c98a14e | 5375 | } |
52bc799a L |
5376 | else |
5377 | memcpy (contents + roff - 3, | |
5378 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
5379 | 15); | |
142411ca | 5380 | |
6de2ae4a L |
5381 | relocation = (htab->elf.sgot->output_section->vma |
5382 | + htab->elf.sgot->output_offset + off | |
142411ca | 5383 | - roff |
5c98a14e | 5384 | - largepic |
142411ca L |
5385 | - input_section->output_section->vma |
5386 | - input_section->output_offset | |
5387 | - 12); | |
5388 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
5389 | contents + roff + 8 + largepic); |
5390 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca | 5391 | rel++; |
60f2e42e | 5392 | wrel++; |
142411ca L |
5393 | continue; |
5394 | } | |
351f65ca | 5395 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
5396 | { |
5397 | /* GDesc -> IE transition. | |
5398 | It's originally something like: | |
5399 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 5400 | |
142411ca | 5401 | Change it to: |
c9736ba0 | 5402 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 5403 | |
142411ca L |
5404 | /* Now modify the instruction as appropriate. To |
5405 | turn a leaq into a movq in the form we use it, it | |
5406 | suffices to change the second byte from 0x8d to | |
5407 | 0x8b. */ | |
5408 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
5409 | ||
5410 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
5411 | htab->elf.sgot->output_section->vma |
5412 | + htab->elf.sgot->output_offset + off | |
142411ca L |
5413 | - rel->r_offset |
5414 | - input_section->output_section->vma | |
5415 | - input_section->output_offset | |
5416 | - 4, | |
5417 | contents + roff); | |
5418 | continue; | |
5419 | } | |
351f65ca | 5420 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
5421 | { |
5422 | /* GDesc -> IE transition. | |
5423 | It's originally: | |
5424 | call *(%rax) | |
5425 | ||
5426 | Change it to: | |
c9736ba0 | 5427 | xchg %ax, %ax. */ |
142411ca | 5428 | |
142411ca L |
5429 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
5430 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
5431 | continue; | |
5432 | } | |
5433 | else | |
5434 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 5435 | } |
bffbf940 JJ |
5436 | break; |
5437 | ||
5438 | case R_X86_64_TLSLD: | |
351f65ca L |
5439 | if (! elf_x86_64_tls_transition (info, input_bfd, |
5440 | input_section, contents, | |
5441 | symtab_hdr, sym_hashes, | |
bedfd056 L |
5442 | &r_type, GOT_UNKNOWN, rel, |
5443 | relend, h, r_symndx, TRUE)) | |
142411ca | 5444 | return FALSE; |
a3fadc9a | 5445 | |
142411ca L |
5446 | if (r_type != R_X86_64_TLSLD) |
5447 | { | |
bffbf940 | 5448 | /* LD->LE transition: |
e2cbcd91 L |
5449 | leaq foo@tlsld(%rip), %rdi |
5450 | call __tls_get_addr@PLT | |
5451 | For 64bit, we change it into: | |
5452 | .word 0x6666; .byte 0x66; movq %fs:0, %rax | |
5453 | For 32bit, we change it into: | |
5454 | nopl 0x0(%rax); movl %fs:0, %eax | |
5455 | Or | |
5456 | leaq foo@tlsld(%rip), %rdi; | |
5457 | call *__tls_get_addr@GOTPCREL(%rip) | |
5458 | which may be converted to | |
5459 | addr32 call __tls_get_addr | |
52bc799a | 5460 | For 64bit, we change it into: |
e2cbcd91 | 5461 | .word 0x6666; .word 0x6666; movq %fs:0, %rax |
52bc799a | 5462 | For 32bit, we change it into: |
e2cbcd91 | 5463 | nopw 0x0(%rax); movl %fs:0, %eax |
5c98a14e | 5464 | For largepic, change: |
e2cbcd91 L |
5465 | leaq foo@tlsgd(%rip), %rdi |
5466 | movabsq $__tls_get_addr@pltoff, %rax | |
5467 | addq %rbx, %rax | |
5468 | call *%rax | |
5469 | into | |
5470 | data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
5471 | movq %fs:0, %eax */ | |
142411ca L |
5472 | |
5473 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
e2cbcd91 L |
5474 | if (ABI_64_P (output_bfd)) |
5475 | { | |
5476 | if (contents[rel->r_offset + 5] == 0xb8) | |
5477 | memcpy (contents + rel->r_offset - 3, | |
5478 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
5479 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
5480 | else if (contents[rel->r_offset + 4] == 0xff | |
5481 | || contents[rel->r_offset + 4] == 0x67) | |
5482 | memcpy (contents + rel->r_offset - 3, | |
5483 | "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", | |
5484 | 13); | |
5485 | else | |
5486 | memcpy (contents + rel->r_offset - 3, | |
5487 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
5488 | } | |
52bc799a | 5489 | else |
e2cbcd91 L |
5490 | { |
5491 | if (contents[rel->r_offset + 4] == 0xff) | |
5492 | memcpy (contents + rel->r_offset - 3, | |
5493 | "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", | |
5494 | 13); | |
5495 | else | |
5496 | memcpy (contents + rel->r_offset - 3, | |
5497 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
5498 | } | |
5499 | /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX | |
5500 | and R_X86_64_PLTOFF64. */ | |
bffbf940 | 5501 | rel++; |
60f2e42e | 5502 | wrel++; |
bffbf940 JJ |
5503 | continue; |
5504 | } | |
5505 | ||
6de2ae4a | 5506 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
5507 | abort (); |
5508 | ||
5509 | off = htab->tls_ld_got.offset; | |
5510 | if (off & 1) | |
5511 | off &= ~1; | |
5512 | else | |
5513 | { | |
5514 | Elf_Internal_Rela outrel; | |
bffbf940 | 5515 | |
6de2ae4a | 5516 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
5517 | abort (); |
5518 | ||
6de2ae4a L |
5519 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5520 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
5521 | |
5522 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5523 | htab->elf.sgot->contents + off); |
bffbf940 | 5524 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 5525 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5526 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 5527 | outrel.r_addend = 0; |
351f65ca | 5528 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 5529 | &outrel); |
bffbf940 JJ |
5530 | htab->tls_ld_got.offset |= 1; |
5531 | } | |
6de2ae4a L |
5532 | relocation = htab->elf.sgot->output_section->vma |
5533 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5534 | unresolved_reloc = FALSE; |
bffbf940 JJ |
5535 | break; |
5536 | ||
5537 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
5538 | if (!bfd_link_executable (info) |
5539 | || (input_section->flags & SEC_CODE) == 0) | |
351f65ca | 5540 | relocation -= elf_x86_64_dtpoff_base (info); |
bffbf940 | 5541 | else |
351f65ca | 5542 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5543 | break; |
5544 | ||
5545 | case R_X86_64_TPOFF32: | |
6769d501 | 5546 | case R_X86_64_TPOFF64: |
0e1862bb | 5547 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 5548 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5549 | break; |
5550 | ||
a69ed7f7 L |
5551 | case R_X86_64_DTPOFF64: |
5552 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
5553 | relocation -= elf_x86_64_dtpoff_base (info); | |
5554 | break; | |
5555 | ||
70256ad8 AJ |
5556 | default: |
5557 | break; | |
5558 | } | |
8d88c4ca | 5559 | |
239e1f3a AM |
5560 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
5561 | because such sections are not SEC_ALLOC and thus ld.so will | |
5562 | not process them. */ | |
c434dee6 | 5563 | if (unresolved_reloc |
239e1f3a | 5564 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
5565 | && h->def_dynamic) |
5566 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
5567 | rel->r_offset) != (bfd_vma) -1) | |
a040981f | 5568 | { |
4eca0228 | 5569 | _bfd_error_handler |
695344c0 | 5570 | /* xgettext:c-format */ |
a040981f L |
5571 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
5572 | input_bfd, | |
5573 | input_section, | |
5574 | (long) rel->r_offset, | |
5575 | howto->name, | |
5576 | h->root.root.string); | |
5577 | return FALSE; | |
5578 | } | |
c434dee6 | 5579 | |
cbe950e9 | 5580 | do_relocation: |
8d88c4ca | 5581 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
5582 | contents, rel->r_offset, |
5583 | relocation, rel->r_addend); | |
8d88c4ca | 5584 | |
62d78908 | 5585 | check_relocation_error: |
8d88c4ca | 5586 | if (r != bfd_reloc_ok) |
8da6118f | 5587 | { |
c434dee6 AJ |
5588 | const char *name; |
5589 | ||
5590 | if (h != NULL) | |
5591 | name = h->root.root.string; | |
5592 | else | |
8da6118f | 5593 | { |
c434dee6 AJ |
5594 | name = bfd_elf_string_from_elf_section (input_bfd, |
5595 | symtab_hdr->sh_link, | |
5596 | sym->st_name); | |
5597 | if (name == NULL) | |
b34976b6 | 5598 | return FALSE; |
c434dee6 AJ |
5599 | if (*name == '\0') |
5600 | name = bfd_section_name (input_bfd, sec); | |
5601 | } | |
5602 | ||
5603 | if (r == bfd_reloc_overflow) | |
1a72702b AM |
5604 | (*info->callbacks->reloc_overflow) |
5605 | (info, (h ? &h->root : NULL), name, howto->name, | |
5606 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
c434dee6 AJ |
5607 | else |
5608 | { | |
4eca0228 | 5609 | _bfd_error_handler |
695344c0 | 5610 | /* xgettext:c-format */ |
bb95161d | 5611 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
d003868e | 5612 | input_bfd, input_section, |
c434dee6 | 5613 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 5614 | return FALSE; |
8da6118f KH |
5615 | } |
5616 | } | |
60f2e42e L |
5617 | |
5618 | if (wrel != rel) | |
5619 | *wrel = *rel; | |
5620 | } | |
5621 | ||
5622 | if (wrel != rel) | |
5623 | { | |
5624 | Elf_Internal_Shdr *rel_hdr; | |
5625 | size_t deleted = rel - wrel; | |
5626 | ||
5627 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
5628 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5629 | if (rel_hdr->sh_size == 0) | |
5630 | { | |
5631 | /* It is too late to remove an empty reloc section. Leave | |
5632 | one NONE reloc. | |
5633 | ??? What is wrong with an empty section??? */ | |
5634 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
5635 | deleted -= 1; | |
5636 | } | |
5637 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
5638 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5639 | input_section->reloc_count -= deleted; | |
8d88c4ca | 5640 | } |
70256ad8 | 5641 | |
b34976b6 | 5642 | return TRUE; |
70256ad8 AJ |
5643 | } |
5644 | ||
5645 | /* Finish up dynamic symbol handling. We set the contents of various | |
5646 | dynamic sections here. */ | |
5647 | ||
b34976b6 | 5648 | static bfd_boolean |
351f65ca L |
5649 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
5650 | struct bfd_link_info *info, | |
5651 | struct elf_link_hash_entry *h, | |
aec6b87e | 5652 | Elf_Internal_Sym *sym) |
70256ad8 | 5653 | { |
351f65ca | 5654 | struct elf_x86_64_link_hash_table *htab; |
f2c29a16 | 5655 | bfd_boolean use_plt_second; |
dd7e64d4 | 5656 | struct elf_x86_64_link_hash_entry *eh; |
aec6b87e | 5657 | bfd_boolean local_undefweak; |
70256ad8 | 5658 | |
351f65ca | 5659 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
5660 | if (htab == NULL) |
5661 | return FALSE; | |
70256ad8 | 5662 | |
f2c29a16 L |
5663 | /* Use the second PLT section only if there is .plt section. */ |
5664 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
0ff2b86e | 5665 | |
dd7e64d4 | 5666 | eh = (struct elf_x86_64_link_hash_entry *) h; |
9e9821dd L |
5667 | if (eh->no_finish_dynamic_symbol) |
5668 | abort (); | |
dd7e64d4 | 5669 | |
aec6b87e L |
5670 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
5671 | resolved undefined weak symbols in executable so that their | |
5672 | references have value 0 at run-time. */ | |
e62b9723 L |
5673 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
5674 | eh->has_got_reloc, | |
5675 | eh); | |
aec6b87e | 5676 | |
70256ad8 AJ |
5677 | if (h->plt.offset != (bfd_vma) -1) |
5678 | { | |
70256ad8 | 5679 | bfd_vma plt_index; |
38b12349 | 5680 | bfd_vma got_offset, plt_offset; |
70256ad8 | 5681 | Elf_Internal_Rela rela; |
947216bf | 5682 | bfd_byte *loc; |
0ff2b86e | 5683 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 5684 | const struct elf_backend_data *bed; |
5974eba6 | 5685 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
5686 | |
5687 | /* When building a static executable, use .iplt, .igot.plt and | |
5688 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 5689 | if (htab->elf.splt != NULL) |
cbe950e9 | 5690 | { |
6de2ae4a L |
5691 | plt = htab->elf.splt; |
5692 | gotplt = htab->elf.sgotplt; | |
5693 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
5694 | } |
5695 | else | |
5696 | { | |
6de2ae4a L |
5697 | plt = htab->elf.iplt; |
5698 | gotplt = htab->elf.igotplt; | |
5699 | relplt = htab->elf.irelplt; | |
cbe950e9 | 5700 | } |
70256ad8 AJ |
5701 | |
5702 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 5703 | it up. */ |
cbe950e9 | 5704 | if ((h->dynindx == -1 |
aec6b87e | 5705 | && !local_undefweak |
0e1862bb | 5706 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
5707 | && h->def_regular |
5708 | && h->type == STT_GNU_IFUNC)) | |
5709 | || plt == NULL | |
5710 | || gotplt == NULL | |
5711 | || relplt == NULL) | |
cec7f46a | 5712 | abort (); |
70256ad8 AJ |
5713 | |
5714 | /* Get the index in the procedure linkage table which | |
5715 | corresponds to this symbol. This is the index of this symbol | |
5716 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 5717 | first entry in the procedure linkage table is reserved. |
6bbec505 | 5718 | |
cbe950e9 | 5719 | Get the offset into the .got table of the entry that |
407443a3 | 5720 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
5721 | bytes. The first three are reserved for the dynamic linker. |
5722 | ||
5723 | For static executables, we don't reserve anything. */ | |
5724 | ||
6de2ae4a | 5725 | if (plt == htab->elf.splt) |
cbe950e9 | 5726 | { |
38b12349 L |
5727 | got_offset = (h->plt.offset / htab->plt.plt_entry_size |
5728 | - htab->plt.has_plt0); | |
e1f98742 | 5729 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
5730 | } |
5731 | else | |
5732 | { | |
38b12349 | 5733 | got_offset = h->plt.offset / htab->plt.plt_entry_size; |
e1f98742 | 5734 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 5735 | } |
70256ad8 | 5736 | |
38b12349 L |
5737 | /* Fill in the entry in the procedure linkage table. */ |
5738 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, | |
5739 | htab->plt.plt_entry_size); | |
f2c29a16 | 5740 | if (use_plt_second) |
0ff2b86e | 5741 | { |
f2c29a16 | 5742 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
38b12349 L |
5743 | htab->non_lazy_plt->plt_entry, |
5744 | htab->non_lazy_plt->plt_entry_size); | |
0ff2b86e | 5745 | |
f2c29a16 L |
5746 | resolved_plt = htab->plt_second; |
5747 | plt_offset = eh->plt_second.offset; | |
0ff2b86e L |
5748 | } |
5749 | else | |
5750 | { | |
0ff2b86e L |
5751 | resolved_plt = plt; |
5752 | plt_offset = h->plt.offset; | |
5753 | } | |
eed180f8 RM |
5754 | |
5755 | /* Insert the relocation positions of the plt section. */ | |
5756 | ||
5757 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
5758 | subtracting the size of that instruction. */ | |
ab7fede8 L |
5759 | plt_got_pcrel_offset = (gotplt->output_section->vma |
5760 | + gotplt->output_offset | |
5761 | + got_offset | |
5762 | - resolved_plt->output_section->vma | |
5763 | - resolved_plt->output_offset | |
5764 | - plt_offset | |
38b12349 | 5765 | - htab->plt.plt_got_insn_size); |
ab7fede8 L |
5766 | |
5767 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 5768 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
695344c0 | 5769 | /* xgettext:c-format */ |
ab7fede8 L |
5770 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"), |
5771 | output_bfd, h->root.root.string); | |
5772 | ||
5773 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
38b12349 L |
5774 | (resolved_plt->contents + plt_offset |
5775 | + htab->plt.plt_got_offset)); | |
cbe950e9 | 5776 | |
653165cc | 5777 | /* Fill in the entry in the global offset table, initially this |
aec6b87e L |
5778 | points to the second part of the PLT entry. Leave the entry |
5779 | as zero for undefined weak symbol in PIE. No PLT relocation | |
5780 | against undefined weak symbol in PIE. */ | |
5781 | if (!local_undefweak) | |
cbe950e9 | 5782 | { |
38b12349 L |
5783 | if (htab->plt.has_plt0) |
5784 | bfd_put_64 (output_bfd, (plt->output_section->vma | |
5785 | + plt->output_offset | |
5786 | + h->plt.offset | |
5787 | + htab->lazy_plt->plt_lazy_offset), | |
5788 | gotplt->contents + got_offset); | |
aec6b87e L |
5789 | |
5790 | /* Fill in the entry in the .rela.plt section. */ | |
5791 | rela.r_offset = (gotplt->output_section->vma | |
5792 | + gotplt->output_offset | |
5793 | + got_offset); | |
5794 | if (h->dynindx == -1 | |
5795 | || ((bfd_link_executable (info) | |
5796 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
5797 | && h->def_regular | |
5798 | && h->type == STT_GNU_IFUNC)) | |
5799 | { | |
6322e5c5 L |
5800 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
5801 | h->root.root.string, | |
5802 | h->root.u.def.section->owner); | |
5803 | ||
aec6b87e L |
5804 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
5805 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
5806 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); | |
5807 | rela.r_addend = (h->root.u.def.value | |
5808 | + h->root.u.def.section->output_section->vma | |
5809 | + h->root.u.def.section->output_offset); | |
5810 | /* R_X86_64_IRELATIVE comes last. */ | |
5811 | plt_index = htab->next_irelative_index--; | |
5812 | } | |
5813 | else | |
5814 | { | |
5815 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); | |
5816 | rela.r_addend = 0; | |
5817 | plt_index = htab->next_jump_slot_index++; | |
5818 | } | |
e1f98742 | 5819 | |
38b12349 L |
5820 | /* Don't fill the second and third slots in PLT entry for |
5821 | static executables nor without PLT0. */ | |
5822 | if (plt == htab->elf.splt && htab->plt.has_plt0) | |
aec6b87e | 5823 | { |
38b12349 L |
5824 | bfd_vma plt0_offset |
5825 | = h->plt.offset + htab->lazy_plt->plt_plt_insn_end; | |
aec6b87e L |
5826 | |
5827 | /* Put relocation index. */ | |
5828 | bfd_put_32 (output_bfd, plt_index, | |
5829 | (plt->contents + h->plt.offset | |
38b12349 | 5830 | + htab->lazy_plt->plt_reloc_offset)); |
aec6b87e L |
5831 | |
5832 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
5833 | check relocation index for overflow since branch displacement | |
5834 | will overflow first. */ | |
5835 | if (plt0_offset > 0x80000000) | |
695344c0 | 5836 | /* xgettext:c-format */ |
aec6b87e L |
5837 | info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"), |
5838 | output_bfd, h->root.root.string); | |
5839 | bfd_put_32 (output_bfd, - plt0_offset, | |
38b12349 L |
5840 | (plt->contents + h->plt.offset |
5841 | + htab->lazy_plt->plt_plt_offset)); | |
aec6b87e | 5842 | } |
351f65ca | 5843 | |
aec6b87e L |
5844 | bed = get_elf_backend_data (output_bfd); |
5845 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
5846 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
5847 | } | |
dd7e64d4 L |
5848 | } |
5849 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
5850 | { | |
38b12349 | 5851 | bfd_vma got_offset, plt_offset; |
dd7e64d4 L |
5852 | asection *plt, *got; |
5853 | bfd_boolean got_after_plt; | |
5854 | int32_t got_pcrel_offset; | |
dd7e64d4 L |
5855 | |
5856 | /* Set the entry in the GOT procedure linkage table. */ | |
5857 | plt = htab->plt_got; | |
5858 | got = htab->elf.sgot; | |
5859 | got_offset = h->got.offset; | |
5860 | ||
5861 | if (got_offset == (bfd_vma) -1 | |
e492d2f8 | 5862 | || (h->type == STT_GNU_IFUNC && h->def_regular) |
dd7e64d4 L |
5863 | || plt == NULL |
5864 | || got == NULL) | |
5865 | abort (); | |
70256ad8 | 5866 | |
38b12349 | 5867 | /* Use the non-lazy PLT entry template for the GOT PLT since they |
dd7e64d4 | 5868 | are the identical. */ |
dd7e64d4 L |
5869 | /* Fill in the entry in the GOT procedure linkage table. */ |
5870 | plt_offset = eh->plt_got.offset; | |
5871 | memcpy (plt->contents + plt_offset, | |
38b12349 L |
5872 | htab->non_lazy_plt->plt_entry, |
5873 | htab->non_lazy_plt->plt_entry_size); | |
dd7e64d4 L |
5874 | |
5875 | /* Put offset the PC-relative instruction referring to the GOT | |
5876 | entry, subtracting the size of that instruction. */ | |
5877 | got_pcrel_offset = (got->output_section->vma | |
5878 | + got->output_offset | |
5879 | + got_offset | |
5880 | - plt->output_section->vma | |
5881 | - plt->output_offset | |
5882 | - plt_offset | |
38b12349 | 5883 | - htab->non_lazy_plt->plt_got_insn_size); |
dd7e64d4 L |
5884 | |
5885 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
5886 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
5887 | if ((got_after_plt && got_pcrel_offset < 0) | |
5888 | || (!got_after_plt && got_pcrel_offset > 0)) | |
695344c0 | 5889 | /* xgettext:c-format */ |
dd7e64d4 L |
5890 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"), |
5891 | output_bfd, h->root.root.string); | |
5892 | ||
5893 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
38b12349 L |
5894 | (plt->contents + plt_offset |
5895 | + htab->non_lazy_plt->plt_got_offset)); | |
dd7e64d4 L |
5896 | } |
5897 | ||
aec6b87e L |
5898 | if (!local_undefweak |
5899 | && !h->def_regular | |
dd7e64d4 L |
5900 | && (h->plt.offset != (bfd_vma) -1 |
5901 | || eh->plt_got.offset != (bfd_vma) -1)) | |
5902 | { | |
5903 | /* Mark the symbol as undefined, rather than as defined in | |
5904 | the .plt section. Leave the value if there were any | |
5905 | relocations where pointer equality matters (this is a clue | |
5906 | for the dynamic linker, to make function pointer | |
5907 | comparisons work between an application and shared | |
5908 | library), otherwise set it to zero. If a function is only | |
5909 | called from a binary, there is no need to slow down | |
5910 | shared libraries because of that. */ | |
5911 | sym->st_shndx = SHN_UNDEF; | |
5912 | if (!h->pointer_equality_needed) | |
5913 | sym->st_value = 0; | |
70256ad8 AJ |
5914 | } |
5915 | ||
aec6b87e L |
5916 | /* Don't generate dynamic GOT relocation against undefined weak |
5917 | symbol in executable. */ | |
bffbf940 | 5918 | if (h->got.offset != (bfd_vma) -1 |
351f65ca | 5919 | && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type) |
aec6b87e L |
5920 | && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE |
5921 | && !local_undefweak) | |
053579d7 | 5922 | { |
053579d7 | 5923 | Elf_Internal_Rela rela; |
233cc9c1 | 5924 | asection *relgot = htab->elf.srelgot; |
053579d7 AJ |
5925 | |
5926 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 5927 | up. */ |
6de2ae4a | 5928 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 5929 | abort (); |
053579d7 | 5930 | |
6de2ae4a L |
5931 | rela.r_offset = (htab->elf.sgot->output_section->vma |
5932 | + htab->elf.sgot->output_offset | |
dc810e39 | 5933 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
5934 | |
5935 | /* If this is a static link, or it is a -Bsymbolic link and the | |
5936 | symbol is defined locally or was forced to be local because | |
5937 | of a version file, we just want to emit a RELATIVE reloc. | |
5938 | The entry in the global offset table will already have been | |
5939 | initialized in the relocate_section function. */ | |
710ab287 | 5940 | if (h->def_regular |
0018b0a3 L |
5941 | && h->type == STT_GNU_IFUNC) |
5942 | { | |
233cc9c1 L |
5943 | if (h->plt.offset == (bfd_vma) -1) |
5944 | { | |
5945 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
5946 | if (htab->elf.splt == NULL) | |
5947 | { | |
5948 | /* use .rel[a].iplt section to store .got relocations | |
5949 | in static executable. */ | |
5950 | relgot = htab->elf.irelplt; | |
5951 | } | |
5952 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
5953 | { | |
6322e5c5 L |
5954 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
5955 | output_bfd, | |
5956 | h->root.root.string, | |
5957 | h->root.u.def.section->owner); | |
5958 | ||
233cc9c1 L |
5959 | rela.r_info = htab->r_info (0, |
5960 | R_X86_64_IRELATIVE); | |
5961 | rela.r_addend = (h->root.u.def.value | |
5962 | + h->root.u.def.section->output_section->vma | |
5963 | + h->root.u.def.section->output_offset); | |
5964 | } | |
5965 | else | |
5966 | goto do_glob_dat; | |
5967 | } | |
5968 | else if (bfd_link_pic (info)) | |
710ab287 L |
5969 | { |
5970 | /* Generate R_X86_64_GLOB_DAT. */ | |
5971 | goto do_glob_dat; | |
5972 | } | |
5973 | else | |
5974 | { | |
90d60710 | 5975 | asection *plt; |
aab82f4c | 5976 | bfd_vma plt_offset; |
90d60710 | 5977 | |
710ab287 L |
5978 | if (!h->pointer_equality_needed) |
5979 | abort (); | |
5980 | ||
5981 | /* For non-shared object, we can't use .got.plt, which | |
5982 | contains the real function addres if we need pointer | |
5983 | equality. We load the GOT entry with the PLT entry. */ | |
f2c29a16 | 5984 | if (htab->plt_second != NULL) |
aab82f4c | 5985 | { |
f2c29a16 L |
5986 | plt = htab->plt_second; |
5987 | plt_offset = eh->plt_second.offset; | |
aab82f4c L |
5988 | } |
5989 | else | |
5990 | { | |
5991 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
5992 | plt_offset = h->plt.offset; | |
5993 | } | |
710ab287 L |
5994 | bfd_put_64 (output_bfd, (plt->output_section->vma |
5995 | + plt->output_offset | |
aab82f4c | 5996 | + plt_offset), |
6de2ae4a | 5997 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
5998 | return TRUE; |
5999 | } | |
0018b0a3 | 6000 | } |
0e1862bb | 6001 | else if (bfd_link_pic (info) |
0018b0a3 | 6002 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
053579d7 | 6003 | { |
41bed6dd L |
6004 | if (!h->def_regular) |
6005 | return FALSE; | |
cc78d0af | 6006 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 6007 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
6008 | rela.r_addend = (h->root.u.def.value |
6009 | + h->root.u.def.section->output_section->vma | |
6010 | + h->root.u.def.section->output_offset); | |
6011 | } | |
6012 | else | |
6013 | { | |
6014 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 6015 | do_glob_dat: |
c434dee6 | 6016 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 6017 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 6018 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
6019 | rela.r_addend = 0; |
6020 | } | |
6021 | ||
233cc9c1 | 6022 | elf_append_rela (output_bfd, relgot, &rela); |
053579d7 AJ |
6023 | } |
6024 | ||
f5385ebf | 6025 | if (h->needs_copy) |
70256ad8 | 6026 | { |
70256ad8 | 6027 | Elf_Internal_Rela rela; |
5474d94f | 6028 | asection *s; |
70256ad8 AJ |
6029 | |
6030 | /* This symbol needs a copy reloc. Set it up. */ | |
6031 | ||
c434dee6 AJ |
6032 | if (h->dynindx == -1 |
6033 | || (h->root.type != bfd_link_hash_defined | |
6034 | && h->root.type != bfd_link_hash_defweak) | |
5474d94f AM |
6035 | || htab->elf.srelbss == NULL |
6036 | || htab->elf.sreldynrelro == NULL) | |
c434dee6 | 6037 | abort (); |
70256ad8 AJ |
6038 | |
6039 | rela.r_offset = (h->root.u.def.value | |
6040 | + h->root.u.def.section->output_section->vma | |
6041 | + h->root.u.def.section->output_offset); | |
351f65ca | 6042 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 6043 | rela.r_addend = 0; |
afbf7e8e | 6044 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
6045 | s = htab->elf.sreldynrelro; |
6046 | else | |
6047 | s = htab->elf.srelbss; | |
6048 | elf_append_rela (output_bfd, s, &rela); | |
70256ad8 AJ |
6049 | } |
6050 | ||
b34976b6 | 6051 | return TRUE; |
70256ad8 AJ |
6052 | } |
6053 | ||
c25bc9fc L |
6054 | /* Finish up local dynamic symbol handling. We set the contents of |
6055 | various dynamic sections here. */ | |
6056 | ||
6057 | static bfd_boolean | |
351f65ca | 6058 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
6059 | { |
6060 | struct elf_link_hash_entry *h | |
6061 | = (struct elf_link_hash_entry *) *slot; | |
6062 | struct bfd_link_info *info | |
eed180f8 | 6063 | = (struct bfd_link_info *) inf; |
c25bc9fc | 6064 | |
351f65ca | 6065 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
c25bc9fc L |
6066 | info, h, NULL); |
6067 | } | |
6068 | ||
aec6b87e L |
6069 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
6070 | here since undefined weak symbol may not be dynamic and may not be | |
6071 | called for elf_x86_64_finish_dynamic_symbol. */ | |
6072 | ||
6073 | static bfd_boolean | |
6074 | elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
6075 | void *inf) | |
6076 | { | |
6077 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
6078 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
6079 | ||
6080 | if (h->root.type != bfd_link_hash_undefweak | |
6081 | || h->dynindx != -1) | |
6082 | return TRUE; | |
6083 | ||
6084 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, | |
6085 | info, h, NULL); | |
6086 | } | |
6087 | ||
c434dee6 AJ |
6088 | /* Used to decide how to sort relocs in an optimal manner for the |
6089 | dynamic linker, before writing them out. */ | |
6090 | ||
6091 | static enum elf_reloc_type_class | |
cae1fbbb | 6092 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
6093 | const asection *rel_sec ATTRIBUTE_UNUSED, |
6094 | const Elf_Internal_Rela *rela) | |
c434dee6 | 6095 | { |
cae1fbbb L |
6096 | bfd *abfd = info->output_bfd; |
6097 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
6098 | struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info); | |
cae1fbbb | 6099 | |
d9e3b590 L |
6100 | if (htab->elf.dynsym != NULL |
6101 | && htab->elf.dynsym->contents != NULL) | |
6102 | { | |
6103 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
6104 | dynamic symbols. */ | |
6105 | unsigned long r_symndx = htab->r_sym (rela->r_info); | |
897463b1 L |
6106 | if (r_symndx != STN_UNDEF) |
6107 | { | |
6108 | Elf_Internal_Sym sym; | |
6109 | if (!bed->s->swap_symbol_in (abfd, | |
6110 | (htab->elf.dynsym->contents | |
6111 | + r_symndx * bed->s->sizeof_sym), | |
6112 | 0, &sym)) | |
6113 | abort (); | |
d9e3b590 | 6114 | |
897463b1 L |
6115 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
6116 | return reloc_class_ifunc; | |
6117 | } | |
d9e3b590 | 6118 | } |
cae1fbbb | 6119 | |
351f65ca | 6120 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 | 6121 | { |
c428ce9d L |
6122 | case R_X86_64_IRELATIVE: |
6123 | return reloc_class_ifunc; | |
c434dee6 | 6124 | case R_X86_64_RELATIVE: |
1da80baa | 6125 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
6126 | return reloc_class_relative; |
6127 | case R_X86_64_JUMP_SLOT: | |
6128 | return reloc_class_plt; | |
6129 | case R_X86_64_COPY: | |
6130 | return reloc_class_copy; | |
6131 | default: | |
6132 | return reloc_class_normal; | |
6133 | } | |
6134 | } | |
6135 | ||
70256ad8 AJ |
6136 | /* Finish up the dynamic sections. */ |
6137 | ||
b34976b6 | 6138 | static bfd_boolean |
351f65ca L |
6139 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
6140 | struct bfd_link_info *info) | |
70256ad8 | 6141 | { |
351f65ca | 6142 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
6143 | bfd *dynobj; |
6144 | asection *sdyn; | |
70256ad8 | 6145 | |
351f65ca | 6146 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
6147 | if (htab == NULL) |
6148 | return FALSE; | |
6149 | ||
c434dee6 | 6150 | dynobj = htab->elf.dynobj; |
3d4d4302 | 6151 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
70256ad8 | 6152 | |
c434dee6 | 6153 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 6154 | { |
82e96e07 L |
6155 | bfd_byte *dyncon, *dynconend; |
6156 | const struct elf_backend_data *bed; | |
6157 | bfd_size_type sizeof_dyn; | |
70256ad8 | 6158 | |
6de2ae4a | 6159 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 6160 | abort (); |
70256ad8 | 6161 | |
82e96e07 L |
6162 | bed = get_elf_backend_data (dynobj); |
6163 | sizeof_dyn = bed->s->sizeof_dyn; | |
6164 | dyncon = sdyn->contents; | |
6165 | dynconend = sdyn->contents + sdyn->size; | |
6166 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
6167 | { |
6168 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
6169 | asection *s; |
6170 | ||
82e96e07 | 6171 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
6172 | |
6173 | switch (dyn.d_tag) | |
6174 | { | |
6175 | default: | |
053579d7 | 6176 | continue; |
70256ad8 AJ |
6177 | |
6178 | case DT_PLTGOT: | |
6de2ae4a | 6179 | s = htab->elf.sgotplt; |
8c37241b | 6180 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 6181 | break; |
70256ad8 AJ |
6182 | |
6183 | case DT_JMPREL: | |
6de2ae4a | 6184 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 6185 | break; |
70256ad8 | 6186 | |
c434dee6 | 6187 | case DT_PLTRELSZ: |
6de2ae4a | 6188 | s = htab->elf.srelplt->output_section; |
eea6121a | 6189 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
6190 | break; |
6191 | ||
67a4f2b7 | 6192 | case DT_TLSDESC_PLT: |
6de2ae4a | 6193 | s = htab->elf.splt; |
67a4f2b7 AO |
6194 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
6195 | + htab->tlsdesc_plt; | |
6196 | break; | |
6197 | ||
6198 | case DT_TLSDESC_GOT: | |
6de2ae4a | 6199 | s = htab->elf.sgot; |
67a4f2b7 AO |
6200 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
6201 | + htab->tlsdesc_got; | |
6202 | break; | |
70256ad8 | 6203 | } |
c434dee6 | 6204 | |
82e96e07 | 6205 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
6206 | } |
6207 | ||
6de2ae4a | 6208 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 6209 | { |
eed180f8 | 6210 | elf_section_data (htab->elf.splt->output_section) |
38b12349 | 6211 | ->this_hdr.sh_entsize = htab->plt.plt_entry_size; |
67a4f2b7 | 6212 | |
38b12349 | 6213 | if (htab->plt.has_plt0) |
67a4f2b7 | 6214 | { |
38b12349 L |
6215 | /* Fill in the special first entry in the procedure linkage |
6216 | table. */ | |
6217 | memcpy (htab->elf.splt->contents, | |
6218 | htab->lazy_plt->plt0_entry, | |
6219 | htab->lazy_plt->plt_entry_size); | |
6220 | /* Add offset for pushq GOT+8(%rip), since the instruction | |
6221 | uses 6 bytes subtract this value. */ | |
67a4f2b7 | 6222 | bfd_put_32 (output_bfd, |
6de2ae4a L |
6223 | (htab->elf.sgotplt->output_section->vma |
6224 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 6225 | + 8 |
6de2ae4a L |
6226 | - htab->elf.splt->output_section->vma |
6227 | - htab->elf.splt->output_offset | |
67a4f2b7 | 6228 | - 6), |
38b12349 L |
6229 | (htab->elf.splt->contents |
6230 | + htab->lazy_plt->plt0_got1_offset)); | |
6231 | /* Add offset for the PC-relative instruction accessing | |
6232 | GOT+16, subtracting the offset to the end of that | |
6233 | instruction. */ | |
67a4f2b7 | 6234 | bfd_put_32 (output_bfd, |
38b12349 L |
6235 | (htab->elf.sgotplt->output_section->vma |
6236 | + htab->elf.sgotplt->output_offset | |
6237 | + 16 | |
6de2ae4a L |
6238 | - htab->elf.splt->output_section->vma |
6239 | - htab->elf.splt->output_offset | |
38b12349 L |
6240 | - htab->lazy_plt->plt0_got2_insn_end), |
6241 | (htab->elf.splt->contents | |
6242 | + htab->lazy_plt->plt0_got2_offset)); | |
6243 | ||
6244 | if (htab->tlsdesc_plt) | |
6245 | { | |
6246 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6247 | htab->elf.sgot->contents + htab->tlsdesc_got); | |
6248 | ||
6249 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, | |
6250 | htab->lazy_plt->plt0_entry, | |
6251 | htab->lazy_plt->plt_entry_size); | |
6252 | ||
6253 | /* Add offset for pushq GOT+8(%rip), since the | |
6254 | instruction uses 6 bytes subtract this value. */ | |
6255 | bfd_put_32 (output_bfd, | |
6256 | (htab->elf.sgotplt->output_section->vma | |
6257 | + htab->elf.sgotplt->output_offset | |
6258 | + 8 | |
6259 | - htab->elf.splt->output_section->vma | |
6260 | - htab->elf.splt->output_offset | |
6261 | - htab->tlsdesc_plt | |
6262 | - 6), | |
6263 | (htab->elf.splt->contents | |
6264 | + htab->tlsdesc_plt | |
6265 | + htab->lazy_plt->plt0_got1_offset)); | |
6266 | /* Add offset for the PC-relative instruction accessing | |
6267 | GOT+TDG, where TDG stands for htab->tlsdesc_got, | |
6268 | subtracting the offset to the end of that | |
6269 | instruction. */ | |
6270 | bfd_put_32 (output_bfd, | |
6271 | (htab->elf.sgot->output_section->vma | |
6272 | + htab->elf.sgot->output_offset | |
6273 | + htab->tlsdesc_got | |
6274 | - htab->elf.splt->output_section->vma | |
6275 | - htab->elf.splt->output_offset | |
6276 | - htab->tlsdesc_plt | |
6277 | - htab->lazy_plt->plt0_got2_insn_end), | |
6278 | (htab->elf.splt->contents | |
6279 | + htab->tlsdesc_plt | |
6280 | + htab->lazy_plt->plt0_got2_offset)); | |
6281 | } | |
67a4f2b7 | 6282 | } |
70256ad8 | 6283 | } |
70256ad8 AJ |
6284 | } |
6285 | ||
38b12349 L |
6286 | if (htab->plt_got != NULL && htab->plt_got->size > 0) |
6287 | elf_section_data (htab->plt_got->output_section) | |
6288 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; | |
6289 | ||
f2c29a16 L |
6290 | if (htab->plt_second != NULL && htab->plt_second->size > 0) |
6291 | elf_section_data (htab->plt_second->output_section) | |
38b12349 | 6292 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; |
0ff2b86e | 6293 | |
38b12349 L |
6294 | /* GOT is always created in setup_gnu_properties. But it may not be |
6295 | needed. */ | |
6296 | if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0) | |
70256ad8 | 6297 | { |
56d4289c L |
6298 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
6299 | { | |
4eca0228 | 6300 | _bfd_error_handler |
56d4289c L |
6301 | (_("discarded output section: `%A'"), htab->elf.sgotplt); |
6302 | return FALSE; | |
6303 | } | |
6304 | ||
38b12349 L |
6305 | /* Set the first entry in the global offset table to the address of |
6306 | the dynamic section. */ | |
6307 | if (sdyn == NULL) | |
6308 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); | |
6309 | else | |
6310 | bfd_put_64 (output_bfd, | |
6311 | sdyn->output_section->vma + sdyn->output_offset, | |
6312 | htab->elf.sgotplt->contents); | |
6313 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ | |
6314 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6315 | htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); | |
6316 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6317 | htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
6318 | ||
6319 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize | |
6320 | = GOT_ENTRY_SIZE; | |
c434dee6 | 6321 | } |
70256ad8 | 6322 | |
e41b3a13 | 6323 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
6324 | if (htab->plt_eh_frame != NULL |
6325 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
6326 | { |
6327 | if (htab->elf.splt != NULL | |
6328 | && htab->elf.splt->size != 0 | |
6329 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
6330 | && htab->elf.splt->output_section != NULL | |
6331 | && htab->plt_eh_frame->output_section != NULL) | |
6332 | { | |
6333 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
6334 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
6335 | + htab->plt_eh_frame->output_offset | |
6336 | + PLT_FDE_START_OFFSET; | |
6337 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
6338 | htab->plt_eh_frame->contents | |
6339 | + PLT_FDE_START_OFFSET); | |
6340 | } | |
dbaa2011 | 6341 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
6342 | { |
6343 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
6344 | htab->plt_eh_frame, | |
6345 | htab->plt_eh_frame->contents)) | |
6346 | return FALSE; | |
6347 | } | |
6348 | } | |
6349 | ||
fff53dae L |
6350 | /* Adjust .eh_frame for .plt.got section. */ |
6351 | if (htab->plt_got_eh_frame != NULL | |
6352 | && htab->plt_got_eh_frame->contents != NULL) | |
6353 | { | |
6354 | if (htab->plt_got != NULL | |
6355 | && htab->plt_got->size != 0 | |
6356 | && (htab->plt_got->flags & SEC_EXCLUDE) == 0 | |
6357 | && htab->plt_got->output_section != NULL | |
6358 | && htab->plt_got_eh_frame->output_section != NULL) | |
6359 | { | |
6360 | bfd_vma plt_start = htab->plt_got->output_section->vma; | |
6361 | bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma | |
6362 | + htab->plt_got_eh_frame->output_offset | |
6363 | + PLT_FDE_START_OFFSET; | |
6364 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
6365 | htab->plt_got_eh_frame->contents | |
6366 | + PLT_FDE_START_OFFSET); | |
6367 | } | |
6368 | if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
6369 | { | |
6370 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
6371 | htab->plt_got_eh_frame, | |
6372 | htab->plt_got_eh_frame->contents)) | |
6373 | return FALSE; | |
6374 | } | |
6375 | } | |
6376 | ||
f2c29a16 L |
6377 | /* Adjust .eh_frame for the second PLT section. */ |
6378 | if (htab->plt_second_eh_frame != NULL | |
6379 | && htab->plt_second_eh_frame->contents != NULL) | |
8361ed4d | 6380 | { |
f2c29a16 L |
6381 | if (htab->plt_second != NULL |
6382 | && htab->plt_second->size != 0 | |
6383 | && (htab->plt_second->flags & SEC_EXCLUDE) == 0 | |
6384 | && htab->plt_second->output_section != NULL | |
6385 | && htab->plt_second_eh_frame->output_section != NULL) | |
8361ed4d | 6386 | { |
f2c29a16 L |
6387 | bfd_vma plt_start = htab->plt_second->output_section->vma; |
6388 | bfd_vma eh_frame_start | |
6389 | = (htab->plt_second_eh_frame->output_section->vma | |
6390 | + htab->plt_second_eh_frame->output_offset | |
6391 | + PLT_FDE_START_OFFSET); | |
8361ed4d | 6392 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, |
f2c29a16 | 6393 | htab->plt_second_eh_frame->contents |
8361ed4d L |
6394 | + PLT_FDE_START_OFFSET); |
6395 | } | |
f2c29a16 L |
6396 | if (htab->plt_second_eh_frame->sec_info_type |
6397 | == SEC_INFO_TYPE_EH_FRAME) | |
8361ed4d L |
6398 | { |
6399 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
f2c29a16 L |
6400 | htab->plt_second_eh_frame, |
6401 | htab->plt_second_eh_frame->contents)) | |
8361ed4d L |
6402 | return FALSE; |
6403 | } | |
6404 | } | |
6405 | ||
6de2ae4a L |
6406 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
6407 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
6408 | = GOT_ENTRY_SIZE; |
6409 | ||
aec6b87e L |
6410 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
6411 | if (bfd_link_pie (info)) | |
6412 | bfd_hash_traverse (&info->hash->table, | |
6413 | elf_x86_64_pie_finish_undefweak_symbol, | |
6414 | info); | |
6415 | ||
b34976b6 | 6416 | return TRUE; |
8d88c4ca NC |
6417 | } |
6418 | ||
233cc9c1 L |
6419 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
6420 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
6421 | It has to be done before elf_link_sort_relocs is called so that | |
6422 | dynamic relocations are properly sorted. */ | |
6423 | ||
6424 | static bfd_boolean | |
6425 | elf_x86_64_output_arch_local_syms | |
6426 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
6427 | struct bfd_link_info *info, | |
6428 | void *flaginfo ATTRIBUTE_UNUSED, | |
6429 | int (*func) (void *, const char *, | |
6430 | Elf_Internal_Sym *, | |
6431 | asection *, | |
6432 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
6433 | { | |
6434 | struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info); | |
6435 | if (htab == NULL) | |
6436 | return FALSE; | |
6437 | ||
6438 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
6439 | htab_traverse (htab->loc_hash_table, | |
6440 | elf_x86_64_finish_local_dynamic_symbol, | |
6441 | info); | |
6442 | ||
6443 | return TRUE; | |
6444 | } | |
6445 | ||
38b12349 | 6446 | /* Sort relocs into address order. */ |
4c45e5c9 | 6447 | |
38b12349 L |
6448 | static int |
6449 | compare_relocs (const void *ap, const void *bp) | |
4c45e5c9 | 6450 | { |
38b12349 L |
6451 | const arelent *a = * (const arelent **) ap; |
6452 | const arelent *b = * (const arelent **) bp; | |
144bed8d | 6453 | |
38b12349 L |
6454 | if (a->address > b->address) |
6455 | return 1; | |
6456 | else if (a->address < b->address) | |
6457 | return -1; | |
3972882e | 6458 | else |
38b12349 L |
6459 | return 0; |
6460 | } | |
cca5b8b6 | 6461 | |
38b12349 L |
6462 | enum elf_x86_64_plt_type |
6463 | { | |
6464 | plt_non_lazy = 0, | |
6465 | plt_lazy = 1 << 0, | |
f2c29a16 | 6466 | plt_second = 1 << 1, |
38b12349 L |
6467 | plt_unknown = -1 |
6468 | }; | |
6469 | ||
6470 | struct elf_x86_64_plt | |
6471 | { | |
6472 | const char *name; | |
6473 | asection *sec; | |
6474 | bfd_byte *contents; | |
6475 | enum elf_x86_64_plt_type type; | |
6476 | unsigned int plt_got_offset; | |
6477 | unsigned int plt_got_insn_size; | |
6478 | unsigned int plt_entry_size; | |
6479 | long count; | |
6480 | }; | |
6481 | ||
6482 | /* Forward declaration. */ | |
6483 | static const struct elf_x86_64_lazy_plt_layout elf_x86_64_nacl_plt; | |
6484 | ||
6485 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all | |
6486 | dynamic relocations. */ | |
6487 | ||
6488 | static long | |
6489 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
6490 | long symcount ATTRIBUTE_UNUSED, | |
6491 | asymbol **syms ATTRIBUTE_UNUSED, | |
6492 | long dynsymcount, | |
6493 | asymbol **dynsyms, | |
6494 | asymbol **ret) | |
6495 | { | |
6496 | long size, count, i, n; | |
6497 | int j; | |
6498 | unsigned int plt_got_offset, plt_entry_size, plt_got_insn_size; | |
6499 | asymbol *s; | |
6500 | bfd_byte *plt_contents; | |
6501 | long dynrelcount, relsize; | |
6502 | arelent **dynrelbuf; | |
6503 | const struct elf_x86_64_lazy_plt_layout *lazy_plt; | |
6504 | const struct elf_x86_64_non_lazy_plt_layout *non_lazy_plt; | |
6505 | const struct elf_x86_64_lazy_plt_layout *lazy_bnd_plt; | |
6506 | const struct elf_x86_64_non_lazy_plt_layout *non_lazy_bnd_plt; | |
6507 | asection *plt; | |
6508 | char *names; | |
6509 | enum elf_x86_64_plt_type plt_type; | |
6510 | struct elf_x86_64_plt plts[] = | |
144bed8d | 6511 | { |
38b12349 L |
6512 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
6513 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
f2c29a16 L |
6514 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, |
6515 | { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
dd9e66ee | 6516 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } |
38b12349 | 6517 | }; |
144bed8d | 6518 | |
38b12349 | 6519 | *ret = NULL; |
144bed8d | 6520 | |
38b12349 L |
6521 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
6522 | return 0; | |
144bed8d | 6523 | |
38b12349 L |
6524 | if (dynsymcount <= 0) |
6525 | return 0; | |
cca5b8b6 | 6526 | |
38b12349 L |
6527 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
6528 | if (relsize <= 0) | |
6529 | return -1; | |
6530 | ||
6531 | dynrelbuf = (arelent **) bfd_malloc (relsize); | |
6532 | if (dynrelbuf == NULL) | |
6533 | return -1; | |
6534 | ||
6535 | dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf, | |
6536 | dynsyms); | |
cca5b8b6 | 6537 | |
38b12349 L |
6538 | /* Sort the relocs by address. */ |
6539 | qsort (dynrelbuf, dynrelcount, sizeof (arelent *), compare_relocs); | |
6540 | ||
6541 | if (get_elf_x86_64_backend_data (abfd)->os == is_normal) | |
144bed8d | 6542 | { |
38b12349 L |
6543 | lazy_plt = &elf_x86_64_lazy_plt; |
6544 | non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
6545 | lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt; | |
6546 | non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt; | |
6547 | } | |
6548 | else | |
6549 | { | |
6550 | lazy_plt = &elf_x86_64_nacl_plt; | |
6551 | non_lazy_plt = NULL; | |
6552 | lazy_bnd_plt = NULL; | |
6553 | non_lazy_bnd_plt = NULL; | |
6554 | } | |
144bed8d | 6555 | |
38b12349 L |
6556 | count = 0; |
6557 | for (j = 0; plts[j].name != NULL; j++) | |
6558 | { | |
6559 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
6560 | if (plt == NULL) | |
6f25f223 | 6561 | continue; |
533d0af0 | 6562 | |
38b12349 L |
6563 | /* Get the PLT section contents. */ |
6564 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
6565 | if (plt_contents == NULL) | |
6566 | break; | |
6567 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
6568 | plt_contents, 0, plt->size)) | |
6569 | { | |
6570 | free (plt_contents); | |
6571 | break; | |
6572 | } | |
144bed8d | 6573 | |
38b12349 L |
6574 | /* Check what kind of PLT it is. */ |
6575 | plt_type = plt_unknown; | |
6576 | if (plts[j].type == plt_unknown) | |
144bed8d | 6577 | { |
38b12349 L |
6578 | /* Match lazy PLT first. Need to check the first two |
6579 | instructions. */ | |
6580 | if ((memcmp (plt_contents, lazy_plt->plt0_entry, | |
6581 | lazy_plt->plt0_got1_offset) == 0) | |
6582 | && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6, | |
6583 | 2) == 0)) | |
6584 | plt_type = plt_lazy; | |
6585 | else if (lazy_bnd_plt != NULL | |
6586 | && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry, | |
6587 | lazy_bnd_plt->plt0_got1_offset) == 0) | |
6588 | && (memcmp (plt_contents + 6, | |
6589 | lazy_bnd_plt->plt0_entry + 6, 3) == 0)) | |
ec1f73bb | 6590 | { |
f2c29a16 | 6591 | plt_type = plt_lazy | plt_second; |
38b12349 | 6592 | lazy_plt = lazy_bnd_plt; |
ec1f73bb | 6593 | } |
144bed8d | 6594 | } |
fca6ae69 | 6595 | |
38b12349 L |
6596 | if (non_lazy_plt != NULL |
6597 | && (plt_type == plt_unknown || plt_type == plt_non_lazy)) | |
6598 | { | |
6599 | /* Match non-lazy PLT. */ | |
6600 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
6601 | non_lazy_plt->plt_got_offset) == 0) | |
6602 | plt_type = plt_non_lazy; | |
6603 | } | |
6604 | ||
6605 | if (non_lazy_bnd_plt != NULL | |
f2c29a16 | 6606 | && (plt_type == plt_unknown || plt_type == plt_second)) |
38b12349 L |
6607 | { |
6608 | /* Match BND PLT. */ | |
6609 | if (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry, | |
6610 | non_lazy_bnd_plt->plt_got_offset) == 0) | |
6611 | { | |
f2c29a16 | 6612 | plt_type = plt_second; |
38b12349 L |
6613 | non_lazy_plt = non_lazy_bnd_plt; |
6614 | } | |
6615 | } | |
6616 | ||
6617 | if (plt_type == plt_unknown) | |
6618 | continue; | |
6619 | ||
6620 | plts[j].sec = plt; | |
6621 | plts[j].type = plt_type; | |
6622 | ||
6623 | if ((plt_type & plt_lazy)) | |
6624 | { | |
6625 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
6626 | plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size; | |
6627 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
6628 | /* Skip PLT0 in lazy PLT. */ | |
6629 | i = 1; | |
6630 | } | |
6631 | else | |
6632 | { | |
6633 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
6634 | plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size; | |
6635 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
6636 | i = 0; | |
6637 | } | |
6638 | ||
f2c29a16 L |
6639 | /* Skip lazy PLT when the second PLT is used. */ |
6640 | if (plt_type == (plt_lazy | plt_second)) | |
38b12349 L |
6641 | plts[j].count = 0; |
6642 | else | |
6643 | { | |
6644 | n = plt->size / plts[j].plt_entry_size; | |
6645 | plts[j].count = n; | |
6646 | count += n - i; | |
6647 | } | |
6648 | ||
6649 | plts[j].contents = plt_contents; | |
144bed8d L |
6650 | } |
6651 | ||
38b12349 L |
6652 | size = count * sizeof (asymbol); |
6653 | s = *ret = (asymbol *) bfd_zmalloc (size); | |
6654 | if (s == NULL) | |
6655 | { | |
6656 | bad_return: | |
6657 | for (j = 0; plts[j].name != NULL; j++) | |
6658 | if (plts[j].contents != NULL) | |
6659 | free (plts[j].contents); | |
6660 | free (dynrelbuf); | |
6661 | return -1; | |
6662 | } | |
3972882e | 6663 | |
38b12349 L |
6664 | /* Check for each PLT section. */ |
6665 | size = 0; | |
6666 | n = 0; | |
6667 | for (j = 0; plts[j].name != NULL; j++) | |
6668 | if ((plt_contents = plts[j].contents) != NULL) | |
6669 | { | |
6670 | long k; | |
6671 | bfd_vma offset; | |
8df9fc9d | 6672 | |
38b12349 L |
6673 | plt_got_offset = plts[j].plt_got_offset; |
6674 | plt_got_insn_size = plts[j].plt_got_insn_size; | |
6675 | plt_entry_size = plts[j].plt_entry_size; | |
0ff2b86e | 6676 | |
38b12349 L |
6677 | plt = plts[j].sec; |
6678 | ||
6679 | if ((plts[j].type & plt_lazy)) | |
6680 | { | |
6681 | /* Skip PLT0 in lazy PLT. */ | |
6682 | k = 1; | |
6683 | offset = plt_entry_size; | |
6684 | } | |
6685 | else | |
6686 | { | |
6687 | k = 0; | |
6688 | offset = 0; | |
6689 | } | |
6690 | ||
6691 | /* Check each PLT entry against dynamic relocations. */ | |
6692 | for (; k < plts[j].count; k++) | |
6693 | { | |
6694 | int off; | |
6695 | bfd_vma got_vma; | |
6696 | long min, max, mid; | |
6697 | arelent *p; | |
6698 | ||
6699 | /* Get the PC-relative offset, a signed 32-bit integer. */ | |
6700 | off = H_GET_32 (abfd, (plt_contents + offset | |
6701 | + plt_got_offset)); | |
6702 | got_vma = plt->vma + offset + off + plt_got_insn_size; | |
6703 | ||
6704 | /* Binary search. */ | |
6705 | p = dynrelbuf[0]; | |
6706 | min = 0; | |
6707 | max = dynrelcount; | |
6708 | while ((min + 1) < max) | |
6709 | { | |
6710 | arelent *r; | |
6711 | ||
6712 | mid = (min + max) / 2; | |
6713 | r = dynrelbuf[mid]; | |
6714 | if (got_vma > r->address) | |
6715 | min = mid; | |
6716 | else if (got_vma < r->address) | |
6717 | max = mid; | |
6718 | else | |
6719 | { | |
6720 | p = r; | |
6721 | break; | |
6722 | } | |
6723 | } | |
6724 | ||
6725 | /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */ | |
6726 | if (got_vma == p->address | |
6727 | && p->howto != NULL | |
6728 | && (p->howto->type == R_X86_64_JUMP_SLOT | |
6729 | || p->howto->type == R_X86_64_GLOB_DAT | |
6730 | || p->howto->type == R_X86_64_IRELATIVE)) | |
6731 | { | |
6732 | *s = **p->sym_ptr_ptr; | |
6733 | /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL | |
6734 | set. Since we are defining a symbol, ensure one | |
6735 | of them is set. */ | |
6736 | if ((s->flags & BSF_LOCAL) == 0) | |
6737 | s->flags |= BSF_GLOBAL; | |
6738 | s->flags |= BSF_SYNTHETIC; | |
6739 | /* This is no longer a section symbol. */ | |
6740 | s->flags &= ~BSF_SECTION_SYM; | |
6741 | s->section = plt; | |
6742 | s->the_bfd = plt->owner; | |
6743 | s->value = offset; | |
6744 | /* Store relocation for later use. */ | |
6745 | s->udata.p = p; | |
6746 | /* Add @plt to function name later. */ | |
6747 | size += strlen (s->name) + sizeof ("@plt"); | |
6748 | if (p->addend != 0) | |
6749 | size += sizeof ("+0x") - 1 + 8 + 8 * ABI_64_P (abfd); | |
6750 | n++; | |
6751 | s++; | |
6752 | } | |
6753 | offset += plt_entry_size; | |
6754 | } | |
6755 | } | |
6756 | ||
6757 | /* PLT entries with R_X86_64_TLSDESC relocations are skipped. */ | |
6758 | if (n == 0) | |
6759 | goto bad_return; | |
6760 | ||
6761 | count = n; | |
6762 | ||
6763 | /* Allocate space for @plt suffixes. */ | |
6764 | names = (char *) bfd_malloc (size); | |
6765 | if (s == NULL) | |
6766 | goto bad_return; | |
6767 | ||
6768 | s = *ret; | |
6769 | for (i = 0; i < count; i++) | |
6770 | { | |
6771 | /* Add @plt to function name. */ | |
6772 | arelent *p = (arelent *) s->udata.p; | |
6773 | /* Clear it now. */ | |
6774 | s->udata.p = NULL; | |
6775 | size = strlen (s->name); | |
6776 | memcpy (names, s->name, size); | |
6777 | s->name = names; | |
6778 | names += size; | |
6779 | if (p->addend != 0) | |
6780 | { | |
6781 | char buf[30], *a; | |
6782 | ||
6783 | memcpy (names, "+0x", sizeof ("+0x") - 1); | |
6784 | names += sizeof ("+0x") - 1; | |
6785 | bfd_sprintf_vma (abfd, buf, p->addend); | |
6786 | for (a = buf; *a == '0'; ++a) | |
6787 | ; | |
6788 | size = strlen (a); | |
6789 | memcpy (names, a, size); | |
6790 | names += size; | |
6791 | } | |
6792 | memcpy (names, "@plt", sizeof ("@plt")); | |
6793 | names += sizeof ("@plt"); | |
6794 | s++; | |
6795 | } | |
6796 | ||
6797 | for (j = 0; plts[j].name != NULL; j++) | |
6798 | if (plts[j].contents != NULL) | |
6799 | free (plts[j].contents); | |
6800 | ||
6801 | free (dynrelbuf); | |
6802 | ||
6803 | return count; | |
0ff2b86e L |
6804 | } |
6805 | ||
d2b2c203 DJ |
6806 | /* Handle an x86-64 specific section when reading an object file. This |
6807 | is called when elfcode.h finds a section with an unknown type. */ | |
6808 | ||
6809 | static bfd_boolean | |
0c723101 L |
6810 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
6811 | const char *name, int shindex) | |
d2b2c203 DJ |
6812 | { |
6813 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
6814 | return FALSE; | |
6815 | ||
6dc132d9 | 6816 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
6817 | return FALSE; |
6818 | ||
6819 | return TRUE; | |
6820 | } | |
6821 | ||
3b22753a L |
6822 | /* Hook called by the linker routine which adds symbols from an object |
6823 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
6824 | of .bss. */ | |
6825 | ||
6826 | static bfd_boolean | |
351f65ca | 6827 | elf_x86_64_add_symbol_hook (bfd *abfd, |
a43942db | 6828 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
351f65ca L |
6829 | Elf_Internal_Sym *sym, |
6830 | const char **namep ATTRIBUTE_UNUSED, | |
6831 | flagword *flagsp ATTRIBUTE_UNUSED, | |
6832 | asection **secp, | |
6833 | bfd_vma *valp) | |
3b22753a L |
6834 | { |
6835 | asection *lcomm; | |
6836 | ||
6837 | switch (sym->st_shndx) | |
6838 | { | |
6839 | case SHN_X86_64_LCOMMON: | |
6840 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
6841 | if (lcomm == NULL) | |
6842 | { | |
6843 | lcomm = bfd_make_section_with_flags (abfd, | |
6844 | "LARGE_COMMON", | |
6845 | (SEC_ALLOC | |
6846 | | SEC_IS_COMMON | |
6847 | | SEC_LINKER_CREATED)); | |
6848 | if (lcomm == NULL) | |
6849 | return FALSE; | |
6850 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
6851 | } | |
6852 | *secp = lcomm; | |
6853 | *valp = sym->st_size; | |
c35bdf6e | 6854 | return TRUE; |
3b22753a | 6855 | } |
d8045f23 | 6856 | |
3b22753a L |
6857 | return TRUE; |
6858 | } | |
6859 | ||
6860 | ||
6861 | /* Given a BFD section, try to locate the corresponding ELF section | |
6862 | index. */ | |
6863 | ||
6864 | static bfd_boolean | |
351f65ca L |
6865 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
6866 | asection *sec, int *index_return) | |
3b22753a L |
6867 | { |
6868 | if (sec == &_bfd_elf_large_com_section) | |
6869 | { | |
91d6fa6a | 6870 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
6871 | return TRUE; |
6872 | } | |
6873 | return FALSE; | |
6874 | } | |
6875 | ||
6876 | /* Process a symbol. */ | |
6877 | ||
6878 | static void | |
351f65ca L |
6879 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
6880 | asymbol *asym) | |
3b22753a L |
6881 | { |
6882 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
6883 | ||
6884 | switch (elfsym->internal_elf_sym.st_shndx) | |
6885 | { | |
6886 | case SHN_X86_64_LCOMMON: | |
6887 | asym->section = &_bfd_elf_large_com_section; | |
6888 | asym->value = elfsym->internal_elf_sym.st_size; | |
6889 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
6890 | asym->flags &= ~BSF_GLOBAL; | |
6891 | break; | |
6892 | } | |
6893 | } | |
6894 | ||
6895 | static bfd_boolean | |
351f65ca | 6896 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
6897 | { |
6898 | return (sym->st_shndx == SHN_COMMON | |
6899 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
6900 | } | |
6901 | ||
6902 | static unsigned int | |
351f65ca | 6903 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
6904 | { |
6905 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
6906 | return SHN_COMMON; | |
6907 | else | |
6908 | return SHN_X86_64_LCOMMON; | |
6909 | } | |
6910 | ||
6911 | static asection * | |
351f65ca | 6912 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
6913 | { |
6914 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
6915 | return bfd_com_section_ptr; | |
6916 | else | |
6917 | return &_bfd_elf_large_com_section; | |
6918 | } | |
6919 | ||
6920 | static bfd_boolean | |
5d13b3b3 AM |
6921 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
6922 | const Elf_Internal_Sym *sym, | |
351f65ca | 6923 | asection **psec, |
5d13b3b3 AM |
6924 | bfd_boolean newdef, |
6925 | bfd_boolean olddef, | |
351f65ca | 6926 | bfd *oldbfd, |
5d13b3b3 | 6927 | const asection *oldsec) |
3b22753a L |
6928 | { |
6929 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
6930 | normal common symbol. We turn the large common symbol into a |
6931 | normal one. */ | |
5d13b3b3 | 6932 | if (!olddef |
3b22753a | 6933 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
6934 | && !newdef |
6935 | && bfd_is_com_section (*psec) | |
6936 | && oldsec != *psec) | |
3b22753a | 6937 | { |
00492999 | 6938 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 6939 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
6940 | { |
6941 | h->root.u.c.p->section | |
6942 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
6943 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
6944 | } | |
6945 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
6946 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
6947 | *psec = bfd_com_section_ptr; | |
3b22753a L |
6948 | } |
6949 | ||
6950 | return TRUE; | |
6951 | } | |
6952 | ||
6953 | static int | |
351f65ca L |
6954 | elf_x86_64_additional_program_headers (bfd *abfd, |
6955 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
6956 | { |
6957 | asection *s; | |
9a2e389a | 6958 | int count = 0; |
3b22753a L |
6959 | |
6960 | /* Check to see if we need a large readonly segment. */ | |
6961 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
6962 | if (s && (s->flags & SEC_LOAD)) | |
6963 | count++; | |
6964 | ||
6965 | /* Check to see if we need a large data segment. Since .lbss sections | |
6966 | is placed right after the .bss section, there should be no need for | |
6967 | a large data segment just because of .lbss. */ | |
6968 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
6969 | if (s && (s->flags & SEC_LOAD)) | |
6970 | count++; | |
6971 | ||
6972 | return count; | |
6973 | } | |
6974 | ||
fdc90cb4 JJ |
6975 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
6976 | ||
6977 | static bfd_boolean | |
351f65ca | 6978 | elf_x86_64_hash_symbol (struct elf_link_hash_entry *h) |
fdc90cb4 JJ |
6979 | { |
6980 | if (h->plt.offset != (bfd_vma) -1 | |
6981 | && !h->def_regular | |
6982 | && !h->pointer_equality_needed) | |
6983 | return FALSE; | |
6984 | ||
6985 | return _bfd_elf_hash_symbol (h); | |
6986 | } | |
6987 | ||
c543bf9a L |
6988 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
6989 | ||
6990 | static bfd_boolean | |
6991 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
6992 | const bfd_target *output) | |
6993 | { | |
6994 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
6995 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
6996 | && _bfd_elf_relocs_compatible (input, output)); | |
6997 | } | |
6998 | ||
46bed679 L |
6999 | /* Parse x86-64 GNU properties. */ |
7000 | ||
7001 | static enum elf_property_kind | |
7002 | elf_x86_64_parse_gnu_properties (bfd *abfd, unsigned int type, | |
7003 | bfd_byte *ptr, unsigned int datasz) | |
7004 | { | |
7005 | elf_property *prop; | |
7006 | ||
7007 | switch (type) | |
7008 | { | |
7009 | case GNU_PROPERTY_X86_ISA_1_USED: | |
7010 | case GNU_PROPERTY_X86_ISA_1_NEEDED: | |
7011 | if (datasz != 4) | |
7012 | { | |
7013 | _bfd_error_handler | |
7014 | ((type == GNU_PROPERTY_X86_ISA_1_USED | |
e4097f5e L |
7015 | ? _("error: %B: <corrupt x86 ISA used size: 0x%x>") |
7016 | : _("error: %B: <corrupt x86 ISA needed size: 0x%x>")), | |
46bed679 L |
7017 | abfd, datasz); |
7018 | return property_corrupt; | |
7019 | } | |
7020 | prop = _bfd_elf_get_property (abfd, type, datasz); | |
73caa85d L |
7021 | /* Combine properties of the same type. */ |
7022 | prop->u.number |= bfd_h_get_32 (abfd, ptr); | |
46bed679 L |
7023 | prop->pr_kind = property_number; |
7024 | break; | |
7025 | ||
7026 | default: | |
7027 | return property_ignored; | |
7028 | } | |
7029 | ||
7030 | return property_number; | |
7031 | } | |
7032 | ||
7033 | /* Merge x86-64 GNU property BPROP with APROP. If APROP isn't NULL, | |
7034 | return TRUE if APROP is updated. Otherwise, return TRUE if BPROP | |
7035 | should be merged with ABFD. */ | |
7036 | ||
7037 | static bfd_boolean | |
7038 | elf_x86_64_merge_gnu_properties (bfd *abfd ATTRIBUTE_UNUSED, | |
7039 | elf_property *aprop, | |
7040 | elf_property *bprop) | |
7041 | { | |
7042 | unsigned int number; | |
7043 | bfd_boolean updated = FALSE; | |
7044 | unsigned int pr_type = aprop != NULL ? aprop->pr_type : bprop->pr_type; | |
7045 | ||
7046 | switch (pr_type) | |
7047 | { | |
7048 | case GNU_PROPERTY_X86_ISA_1_USED: | |
7049 | case GNU_PROPERTY_X86_ISA_1_NEEDED: | |
7050 | if (aprop != NULL && bprop != NULL) | |
7051 | { | |
7052 | number = aprop->u.number; | |
7053 | aprop->u.number = number | bprop->u.number; | |
7054 | updated = number != (unsigned int) aprop->u.number; | |
7055 | } | |
7056 | else | |
7057 | { | |
7058 | /* Return TRUE if APROP is NULL to indicate that BPROP should | |
7059 | be added to ABFD. */ | |
7060 | updated = aprop == NULL; | |
7061 | } | |
7062 | break; | |
7063 | ||
7064 | default: | |
7065 | /* Never should happen. */ | |
7066 | abort (); | |
7067 | } | |
7068 | ||
7069 | return updated; | |
7070 | } | |
7071 | ||
38b12349 L |
7072 | /* Set up x86-64 GNU properties. Return the first relocatable ELF input |
7073 | with GNU properties if found. Otherwise, return NULL. */ | |
7074 | ||
7075 | static bfd * | |
7076 | elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info) | |
7077 | { | |
7078 | bfd_boolean normal_target; | |
7079 | bfd_boolean lazy_plt; | |
7080 | asection *sec, *pltsec; | |
7081 | bfd *dynobj; | |
7082 | unsigned int plt_alignment; | |
7083 | struct elf_x86_64_link_hash_table *htab; | |
7084 | bfd *pbfd = _bfd_elf_link_setup_gnu_properties (info); | |
7085 | ||
7086 | if (bfd_link_relocatable (info)) | |
7087 | return pbfd; | |
7088 | ||
7089 | htab = elf_x86_64_hash_table (info); | |
7090 | if (htab == NULL) | |
7091 | return pbfd; | |
7092 | ||
7093 | dynobj = htab->elf.dynobj; | |
7094 | ||
7095 | /* Set htab->elf.dynobj here so that there is no need to check and | |
7096 | set it in check_relocs. */ | |
7097 | if (dynobj == NULL) | |
7098 | { | |
7099 | bfd *abfd; | |
7100 | ||
7101 | /* Find a normal input file to hold linker created | |
7102 | sections. */ | |
7103 | for (abfd = info->input_bfds; | |
7104 | abfd != NULL; | |
7105 | abfd = abfd->link.next) | |
7106 | if ((abfd->flags | |
7107 | & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0) | |
7108 | { | |
7109 | htab->elf.dynobj = abfd; | |
7110 | dynobj = abfd; | |
7111 | break; | |
7112 | } | |
7113 | } | |
7114 | ||
7115 | /* Even when lazy binding is disabled by "-z now", the PLT0 entry may | |
7116 | still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for | |
7117 | canonical function address. */ | |
7118 | htab->plt.has_plt0 = 1; | |
7119 | ||
7120 | if (get_elf_x86_64_backend_data (info->output_bfd)->os | |
7121 | == is_normal) | |
7122 | { | |
7123 | if (info->bndplt) | |
7124 | { | |
7125 | htab->lazy_plt = &elf_x86_64_lazy_bnd_plt; | |
7126 | htab->non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt; | |
7127 | } | |
7128 | else | |
7129 | { | |
7130 | htab->lazy_plt = &elf_x86_64_lazy_plt; | |
7131 | htab->non_lazy_plt = &elf_x86_64_non_lazy_plt; | |
7132 | } | |
7133 | normal_target = TRUE; | |
7134 | } | |
7135 | else | |
7136 | { | |
7137 | htab->lazy_plt = &elf_x86_64_nacl_plt; | |
7138 | htab->non_lazy_plt = NULL; | |
7139 | normal_target = FALSE; | |
7140 | } | |
7141 | ||
7142 | pltsec = htab->elf.splt; | |
7143 | ||
7144 | /* If the non-lazy PLT is available, use it for all PLT entries if | |
7145 | there are no PLT0 or no .plt section. */ | |
7146 | if (htab->non_lazy_plt != NULL | |
7147 | && (!htab->plt.has_plt0 || pltsec == NULL)) | |
7148 | { | |
7149 | lazy_plt = FALSE; | |
7150 | htab->plt.plt_entry | |
7151 | = htab->non_lazy_plt->plt_entry; | |
7152 | htab->plt.plt_entry_size | |
7153 | = htab->non_lazy_plt->plt_entry_size; | |
7154 | htab->plt.plt_got_offset | |
7155 | = htab->non_lazy_plt->plt_got_offset; | |
7156 | htab->plt.plt_got_insn_size | |
7157 | = htab->non_lazy_plt->plt_got_insn_size; | |
7158 | htab->plt.eh_frame_plt_size | |
7159 | = htab->non_lazy_plt->eh_frame_plt_size; | |
7160 | htab->plt.eh_frame_plt | |
7161 | = htab->non_lazy_plt->eh_frame_plt; | |
7162 | } | |
7163 | else | |
7164 | { | |
7165 | lazy_plt = TRUE; | |
7166 | htab->plt.plt_entry | |
7167 | = htab->lazy_plt->plt_entry; | |
7168 | htab->plt.plt_entry_size | |
7169 | = htab->lazy_plt->plt_entry_size; | |
7170 | htab->plt.plt_got_offset | |
7171 | = htab->lazy_plt->plt_got_offset; | |
7172 | htab->plt.plt_got_insn_size | |
7173 | = htab->lazy_plt->plt_got_insn_size; | |
7174 | htab->plt.eh_frame_plt_size | |
7175 | = htab->lazy_plt->eh_frame_plt_size; | |
7176 | htab->plt.eh_frame_plt | |
7177 | = htab->lazy_plt->eh_frame_plt; | |
7178 | } | |
7179 | ||
7180 | /* Return if there are no normal input files. */ | |
7181 | if (dynobj == NULL) | |
7182 | return pbfd; | |
7183 | ||
7184 | /* Since create_dynamic_sections isn't always called, but GOT | |
7185 | relocations need GOT relocations, create them here so that we | |
7186 | don't need to do it in check_relocs. */ | |
7187 | if (htab->elf.sgot == NULL | |
7188 | && !_bfd_elf_create_got_section (dynobj, info)) | |
7189 | info->callbacks->einfo (_("%F: failed to create GOT sections\n")); | |
7190 | ||
7191 | /* Align .got and .got.plt sections to their entry size. Do it here | |
7192 | instead of in create_dynamic_sections so that they are always | |
7193 | properly aligned even if create_dynamic_sections isn't called. */ | |
7194 | sec = htab->elf.sgot; | |
7195 | if (!bfd_set_section_alignment (dynobj, sec, 3)) | |
7196 | { | |
7197 | error_alignment: | |
7198 | info->callbacks->einfo (_("%F%A: failed to align section\n"), | |
7199 | sec); | |
7200 | } | |
7201 | ||
7202 | sec = htab->elf.sgotplt; | |
7203 | if (!bfd_set_section_alignment (dynobj, sec, 3)) | |
7204 | goto error_alignment; | |
7205 | ||
7206 | /* Create the ifunc sections here so that check_relocs can be | |
7207 | simplified. */ | |
7208 | if (!_bfd_elf_create_ifunc_sections (dynobj, info)) | |
7209 | info->callbacks->einfo (_("%F: failed to create ifunc sections\n")); | |
7210 | ||
7211 | plt_alignment = bfd_log2 (htab->plt.plt_entry_size); | |
7212 | ||
7213 | if (pltsec != NULL) | |
7214 | { | |
7215 | /* Whe creating executable, set the contents of the .interp | |
7216 | section to the interpreter. */ | |
7217 | if (bfd_link_executable (info) && !info->nointerp) | |
7218 | { | |
7219 | asection *s = bfd_get_linker_section (dynobj, ".interp"); | |
7220 | if (s == NULL) | |
7221 | abort (); | |
7222 | s->size = htab->dynamic_interpreter_size; | |
7223 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
7224 | htab->interp = s; | |
7225 | } | |
7226 | ||
7227 | /* Don't change PLT section alignment for NaCl since it uses | |
7228 | 64-byte PLT entry and sets PLT section alignment to 32 | |
7229 | bytes. Don't create additional PLT sections for NaCl. */ | |
7230 | if (normal_target) | |
7231 | { | |
7232 | const struct elf_backend_data *bed | |
7233 | = get_elf_backend_data (dynobj); | |
7234 | flagword pltflags = (bed->dynamic_sec_flags | |
7235 | | SEC_ALLOC | |
7236 | | SEC_CODE | |
7237 | | SEC_LOAD | |
7238 | | SEC_READONLY); | |
7239 | unsigned int non_lazy_plt_alignment | |
7240 | = bfd_log2 (htab->non_lazy_plt->plt_entry_size); | |
7241 | ||
7242 | sec = pltsec; | |
7243 | if (!bfd_set_section_alignment (sec->owner, sec, | |
7244 | plt_alignment)) | |
7245 | goto error_alignment; | |
7246 | ||
7247 | /* Create the GOT procedure linkage table. */ | |
7248 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
7249 | ".plt.got", | |
7250 | pltflags); | |
7251 | if (sec == NULL) | |
7252 | info->callbacks->einfo (_("%F: failed to create GOT PLT section\n")); | |
7253 | ||
7254 | if (!bfd_set_section_alignment (dynobj, sec, | |
7255 | non_lazy_plt_alignment)) | |
7256 | goto error_alignment; | |
7257 | ||
7258 | htab->plt_got = sec; | |
7259 | ||
7260 | /* MPX PLT is supported only for non-NaCl target in 64-bit | |
7261 | mode and is needed only for lazy binding. */ | |
7262 | if (lazy_plt | |
25f94347 | 7263 | && info->bndplt && ABI_64_P (dynobj)) |
38b12349 L |
7264 | { |
7265 | /* Create the second PLT for Intel MPX support. */ | |
7266 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
f2c29a16 | 7267 | ".plt.sec", |
38b12349 L |
7268 | pltflags); |
7269 | if (sec == NULL) | |
7270 | info->callbacks->einfo (_("%F: failed to create BND PLT section\n")); | |
7271 | ||
7272 | if (!bfd_set_section_alignment (dynobj, sec, | |
7273 | non_lazy_plt_alignment)) | |
7274 | goto error_alignment; | |
7275 | ||
f2c29a16 | 7276 | htab->plt_second = sec; |
38b12349 L |
7277 | } |
7278 | } | |
7279 | ||
7280 | if (!info->no_ld_generated_unwind_info) | |
7281 | { | |
7282 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | |
7283 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
7284 | | SEC_LINKER_CREATED); | |
7285 | ||
7286 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
7287 | ".eh_frame", | |
7288 | flags); | |
7289 | if (sec == NULL) | |
7290 | info->callbacks->einfo (_("%F: failed to create PLT .eh_frame section\n")); | |
7291 | ||
7292 | if (!bfd_set_section_alignment (dynobj, sec, | |
7293 | ABI_64_P (dynobj) ? 3 : 2)) | |
7294 | goto error_alignment; | |
7295 | ||
7296 | htab->plt_eh_frame = sec; | |
7297 | ||
7298 | if (htab->plt_got != NULL) | |
7299 | { | |
7300 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
7301 | ".eh_frame", | |
7302 | flags); | |
7303 | if (sec == NULL) | |
7304 | info->callbacks->einfo (_("%F: failed to create GOT PLT .eh_frame section\n")); | |
7305 | ||
7306 | if (!bfd_set_section_alignment (dynobj, sec, | |
7307 | ABI_64_P (dynobj) ? 3 : 2)) | |
7308 | goto error_alignment; | |
7309 | ||
7310 | htab->plt_got_eh_frame = sec; | |
7311 | } | |
7312 | ||
f2c29a16 | 7313 | if (htab->plt_second != NULL) |
38b12349 L |
7314 | { |
7315 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
7316 | ".eh_frame", | |
7317 | flags); | |
7318 | if (sec == NULL) | |
7319 | info->callbacks->einfo (_("%F: failed to create BND PLT .eh_frame section\n")); | |
7320 | ||
7321 | if (!bfd_set_section_alignment (dynobj, sec, 3)) | |
7322 | goto error_alignment; | |
7323 | ||
f2c29a16 | 7324 | htab->plt_second_eh_frame = sec; |
38b12349 L |
7325 | } |
7326 | } | |
7327 | } | |
7328 | ||
7329 | if (normal_target) | |
7330 | { | |
7331 | /* The .iplt section is used for IFUNC symbols in static | |
7332 | executables. */ | |
7333 | sec = htab->elf.iplt; | |
7334 | if (sec != NULL | |
7335 | && !bfd_set_section_alignment (sec->owner, sec, | |
7336 | plt_alignment)) | |
7337 | goto error_alignment; | |
7338 | } | |
7339 | ||
7340 | return pbfd; | |
7341 | } | |
7342 | ||
9a2e389a | 7343 | static const struct bfd_elf_special_section |
46bed679 | 7344 | elf_x86_64_special_sections[]= |
3b22753a | 7345 | { |
0112cd26 NC |
7346 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
7347 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
7348 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
7349 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
7350 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
7351 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
7352 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
7353 | }; |
7354 | ||
6d00b590 | 7355 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
7356 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
7357 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 7358 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 7359 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 7360 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 7361 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 7362 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
7363 | |
7364 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 7365 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
7366 | #define elf_backend_want_got_plt 1 |
7367 | #define elf_backend_plt_readonly 1 | |
7368 | #define elf_backend_want_plt_sym 0 | |
7369 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 7370 | #define elf_backend_rela_normal 1 |
e41b3a13 | 7371 | #define elf_backend_plt_alignment 4 |
f7483970 | 7372 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 7373 | #define elf_backend_caches_rawsize 1 |
64f52338 | 7374 | #define elf_backend_dtrel_excludes_plt 1 |
5474d94f | 7375 | #define elf_backend_want_dynrelro 1 |
70256ad8 | 7376 | |
351f65ca | 7377 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 7378 | |
70256ad8 | 7379 | #define bfd_elf64_bfd_link_hash_table_create \ |
351f65ca | 7380 | elf_x86_64_link_hash_table_create |
351f65ca | 7381 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 7382 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 7383 | elf_x86_64_reloc_name_lookup |
70256ad8 | 7384 | |
351f65ca | 7385 | #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol |
c543bf9a | 7386 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca L |
7387 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
7388 | #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol | |
38b12349 | 7389 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
351f65ca L |
7390 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections |
7391 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
233cc9c1 | 7392 | #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms |
351f65ca | 7393 | #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook |
351f65ca L |
7394 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus |
7395 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
7396 | #ifdef CORE_HEADER |
7397 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
7398 | #endif | |
351f65ca L |
7399 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
7400 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
7401 | #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections | |
7402 | #define elf_backend_always_size_sections elf_x86_64_always_size_sections | |
74541ad4 | 7403 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 7404 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
351f65ca | 7405 | #define bfd_elf64_mkobject elf_x86_64_mkobject |
0ff2b86e | 7406 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 7407 | |
d2b2c203 | 7408 | #define elf_backend_section_from_shdr \ |
351f65ca | 7409 | elf_x86_64_section_from_shdr |
d2b2c203 | 7410 | |
3b22753a | 7411 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 7412 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 7413 | #define elf_backend_add_symbol_hook \ |
351f65ca | 7414 | elf_x86_64_add_symbol_hook |
3b22753a | 7415 | #define elf_backend_symbol_processing \ |
351f65ca | 7416 | elf_x86_64_symbol_processing |
3b22753a | 7417 | #define elf_backend_common_section_index \ |
351f65ca | 7418 | elf_x86_64_common_section_index |
3b22753a | 7419 | #define elf_backend_common_section \ |
351f65ca | 7420 | elf_x86_64_common_section |
3b22753a | 7421 | #define elf_backend_common_definition \ |
351f65ca | 7422 | elf_x86_64_common_definition |
3b22753a | 7423 | #define elf_backend_merge_symbol \ |
351f65ca | 7424 | elf_x86_64_merge_symbol |
3b22753a | 7425 | #define elf_backend_special_sections \ |
351f65ca | 7426 | elf_x86_64_special_sections |
3b22753a | 7427 | #define elf_backend_additional_program_headers \ |
351f65ca | 7428 | elf_x86_64_additional_program_headers |
fdc90cb4 | 7429 | #define elf_backend_hash_symbol \ |
351f65ca | 7430 | elf_x86_64_hash_symbol |
8f79b794 L |
7431 | #define elf_backend_omit_section_dynsym \ |
7432 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
aec6b87e L |
7433 | #define elf_backend_fixup_symbol \ |
7434 | elf_x86_64_fixup_symbol | |
46bed679 L |
7435 | #define elf_backend_parse_gnu_properties \ |
7436 | elf_x86_64_parse_gnu_properties | |
7437 | #define elf_backend_merge_gnu_properties \ | |
7438 | elf_x86_64_merge_gnu_properties | |
38b12349 L |
7439 | #define elf_backend_setup_gnu_properties \ |
7440 | elf_x86_64_link_setup_gnu_properties | |
3b22753a | 7441 | |
8d88c4ca | 7442 | #include "elf64-target.h" |
9d7cbccd | 7443 | |
6036f486 ES |
7444 | /* CloudABI support. */ |
7445 | ||
7446 | #undef TARGET_LITTLE_SYM | |
7447 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec | |
7448 | #undef TARGET_LITTLE_NAME | |
7449 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" | |
7450 | ||
7451 | #undef ELF_OSABI | |
7452 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
7453 | ||
7454 | #undef elf64_bed | |
7455 | #define elf64_bed elf64_x86_64_cloudabi_bed | |
7456 | ||
7457 | #include "elf64-target.h" | |
7458 | ||
9d7cbccd NC |
7459 | /* FreeBSD support. */ |
7460 | ||
7461 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7462 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
9d7cbccd NC |
7463 | #undef TARGET_LITTLE_NAME |
7464 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
7465 | ||
d1036acb L |
7466 | #undef ELF_OSABI |
7467 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 7468 | |
9d7cbccd NC |
7469 | #undef elf64_bed |
7470 | #define elf64_bed elf64_x86_64_fbsd_bed | |
7471 | ||
7472 | #include "elf64-target.h" | |
8a9036a4 | 7473 | |
a6cc6b3b RO |
7474 | /* Solaris 2 support. */ |
7475 | ||
7476 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7477 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
7478 | #undef TARGET_LITTLE_NAME |
7479 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
7480 | ||
7481 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
7482 | objects won't be recognized. */ | |
7483 | #undef ELF_OSABI | |
7484 | ||
7485 | #undef elf64_bed | |
7486 | #define elf64_bed elf64_x86_64_sol2_bed | |
7487 | ||
7dc98aea RO |
7488 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
7489 | boundary. */ | |
84865015 | 7490 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
7491 | #define elf_backend_static_tls_alignment 16 |
7492 | ||
a6cc6b3b RO |
7493 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
7494 | ||
7495 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
7496 | File, p.63. */ | |
84865015 | 7497 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
7498 | #define elf_backend_want_plt_sym 1 |
7499 | ||
84865015 NC |
7500 | #undef elf_backend_strtab_flags |
7501 | #define elf_backend_strtab_flags SHF_STRINGS | |
7502 | ||
7503 | static bfd_boolean | |
5522f910 NC |
7504 | elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
7505 | bfd *obfd ATTRIBUTE_UNUSED, | |
7506 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
7507 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
7508 | { |
7509 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
7510 | and sh_link fields of Solaris specific section types. */ | |
7511 | return FALSE; | |
7512 | } | |
7513 | ||
5522f910 NC |
7514 | #undef elf_backend_copy_special_section_fields |
7515 | #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields | |
84865015 | 7516 | |
a6cc6b3b RO |
7517 | #include "elf64-target.h" |
7518 | ||
8059fb19 RM |
7519 | /* Native Client support. */ |
7520 | ||
64b384e1 RM |
7521 | static bfd_boolean |
7522 | elf64_x86_64_nacl_elf_object_p (bfd *abfd) | |
7523 | { | |
7524 | /* Set the right machine number for a NaCl x86-64 ELF64 file. */ | |
7525 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl); | |
7526 | return TRUE; | |
7527 | } | |
7528 | ||
8059fb19 | 7529 | #undef TARGET_LITTLE_SYM |
6d00b590 | 7530 | #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec |
8059fb19 RM |
7531 | #undef TARGET_LITTLE_NAME |
7532 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
7533 | #undef elf64_bed | |
7534 | #define elf64_bed elf64_x86_64_nacl_bed | |
7535 | ||
7536 | #undef ELF_MAXPAGESIZE | |
7537 | #undef ELF_MINPAGESIZE | |
7538 | #undef ELF_COMMONPAGESIZE | |
7539 | #define ELF_MAXPAGESIZE 0x10000 | |
7540 | #define ELF_MINPAGESIZE 0x10000 | |
7541 | #define ELF_COMMONPAGESIZE 0x10000 | |
7542 | ||
7543 | /* Restore defaults. */ | |
7544 | #undef ELF_OSABI | |
7545 | #undef elf_backend_static_tls_alignment | |
7546 | #undef elf_backend_want_plt_sym | |
7547 | #define elf_backend_want_plt_sym 0 | |
84865015 | 7548 | #undef elf_backend_strtab_flags |
5522f910 | 7549 | #undef elf_backend_copy_special_section_fields |
8059fb19 RM |
7550 | |
7551 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
7552 | ||
7553 | #undef elf_backend_plt_alignment | |
7554 | #define elf_backend_plt_alignment 5 | |
7555 | #define NACL_PLT_ENTRY_SIZE 64 | |
7556 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
7557 | ||
7558 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
7559 | { | |
7560 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
7561 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ | |
7562 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
7563 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
7564 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
7565 | ||
ea2d813e | 7566 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
70cc877f | 7567 | 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */ |
ea2d813e RM |
7568 | |
7569 | /* 32 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 7570 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 7571 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 7572 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 | 7573 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
3ddf1bdd | 7574 | 0x66, /* excess data16 prefix */ |
ea2d813e | 7575 | 0x90 /* nop */ |
8059fb19 RM |
7576 | }; |
7577 | ||
7578 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
7579 | { | |
7580 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
7581 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
7582 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
7583 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
7584 | ||
7585 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
3ddf1bdd | 7586 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
7587 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
7588 | ||
7589 | /* Lazy GOT entries point here (32-byte aligned). */ | |
7590 | 0x68, /* pushq immediate */ | |
7591 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
7592 | 0xe9, /* jmp relative */ | |
7593 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
7594 | ||
7595 | /* 22 bytes of nop to pad out to the standard size. */ | |
3ddf1bdd | 7596 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */ |
8059fb19 RM |
7597 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ |
7598 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ | |
7599 | }; | |
7600 | ||
7601 | /* .eh_frame covering the .plt section. */ | |
7602 | ||
7603 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
7604 | { | |
7605 | #if (PLT_CIE_LENGTH != 20 \ | |
7606 | || PLT_FDE_LENGTH != 36 \ | |
7607 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
7608 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
7609 | # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!" | |
7610 | #endif | |
7611 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
7612 | 0, 0, 0, 0, /* CIE ID */ | |
7613 | 1, /* CIE version */ | |
7614 | 'z', 'R', 0, /* Augmentation string */ | |
7615 | 1, /* Code alignment factor */ | |
7616 | 0x78, /* Data alignment factor */ | |
7617 | 16, /* Return address column */ | |
7618 | 1, /* Augmentation size */ | |
7619 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
7620 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
7621 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
7622 | DW_CFA_nop, DW_CFA_nop, | |
7623 | ||
7624 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
7625 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
7626 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
7627 | 0, 0, 0, 0, /* .plt size goes here */ | |
7628 | 0, /* Augmentation size */ | |
7629 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
7630 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
7631 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
7632 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
7633 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
7634 | 13, /* Block length */ | |
7635 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
7636 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
7637 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
7638 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
7639 | DW_CFA_nop, DW_CFA_nop | |
7640 | }; | |
7641 | ||
38b12349 | 7642 | static const struct elf_x86_64_lazy_plt_layout elf_x86_64_nacl_plt = |
8059fb19 RM |
7643 | { |
7644 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ | |
7645 | elf_x86_64_nacl_plt_entry, /* plt_entry */ | |
7646 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
7647 | 2, /* plt0_got1_offset */ | |
7648 | 9, /* plt0_got2_offset */ | |
7649 | 13, /* plt0_got2_insn_end */ | |
7650 | 3, /* plt_got_offset */ | |
7651 | 33, /* plt_reloc_offset */ | |
7652 | 38, /* plt_plt_offset */ | |
7653 | 7, /* plt_got_insn_size */ | |
7654 | 42, /* plt_plt_insn_end */ | |
7655 | 32, /* plt_lazy_offset */ | |
7656 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ | |
38b12349 L |
7657 | sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */ |
7658 | }; | |
7659 | ||
7660 | static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed = | |
7661 | { | |
7662 | is_nacl /* os */ | |
8059fb19 RM |
7663 | }; |
7664 | ||
7665 | #undef elf_backend_arch_data | |
7666 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
7667 | ||
64b384e1 RM |
7668 | #undef elf_backend_object_p |
7669 | #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p | |
5a68afcf RM |
7670 | #undef elf_backend_modify_segment_map |
7671 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
7672 | #undef elf_backend_modify_program_headers | |
7673 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
7674 | #undef elf_backend_final_write_processing |
7675 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 7676 | |
8059fb19 RM |
7677 | #include "elf64-target.h" |
7678 | ||
7679 | /* Native Client x32 support. */ | |
7680 | ||
64b384e1 RM |
7681 | static bfd_boolean |
7682 | elf32_x86_64_nacl_elf_object_p (bfd *abfd) | |
7683 | { | |
7684 | /* Set the right machine number for a NaCl x86-64 ELF32 file. */ | |
7685 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl); | |
7686 | return TRUE; | |
7687 | } | |
7688 | ||
8059fb19 | 7689 | #undef TARGET_LITTLE_SYM |
6d00b590 | 7690 | #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec |
8059fb19 RM |
7691 | #undef TARGET_LITTLE_NAME |
7692 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" | |
7693 | #undef elf32_bed | |
7694 | #define elf32_bed elf32_x86_64_nacl_bed | |
7695 | ||
7696 | #define bfd_elf32_bfd_link_hash_table_create \ | |
7697 | elf_x86_64_link_hash_table_create | |
8059fb19 RM |
7698 | #define bfd_elf32_bfd_reloc_type_lookup \ |
7699 | elf_x86_64_reloc_type_lookup | |
7700 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
7701 | elf_x86_64_reloc_name_lookup | |
7702 | #define bfd_elf32_mkobject \ | |
7703 | elf_x86_64_mkobject | |
b7365e5d L |
7704 | #define bfd_elf32_get_synthetic_symtab \ |
7705 | elf_x86_64_get_synthetic_symtab | |
8059fb19 RM |
7706 | |
7707 | #undef elf_backend_object_p | |
7708 | #define elf_backend_object_p \ | |
64b384e1 | 7709 | elf32_x86_64_nacl_elf_object_p |
8059fb19 RM |
7710 | |
7711 | #undef elf_backend_bfd_from_remote_memory | |
7712 | #define elf_backend_bfd_from_remote_memory \ | |
7713 | _bfd_elf32_bfd_from_remote_memory | |
7714 | ||
7715 | #undef elf_backend_size_info | |
7716 | #define elf_backend_size_info \ | |
7717 | _bfd_elf32_size_info | |
7718 | ||
7719 | #include "elf32-target.h" | |
7720 | ||
7721 | /* Restore defaults. */ | |
5a68afcf | 7722 | #undef elf_backend_object_p |
8059fb19 | 7723 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
7724 | #undef elf_backend_bfd_from_remote_memory |
7725 | #undef elf_backend_size_info | |
7726 | #undef elf_backend_modify_segment_map | |
7727 | #undef elf_backend_modify_program_headers | |
887badb3 | 7728 | #undef elf_backend_final_write_processing |
8059fb19 | 7729 | |
8a9036a4 L |
7730 | /* Intel L1OM support. */ |
7731 | ||
7732 | static bfd_boolean | |
7733 | elf64_l1om_elf_object_p (bfd *abfd) | |
7734 | { | |
7735 | /* Set the right machine number for an L1OM elf64 file. */ | |
7736 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
7737 | return TRUE; | |
7738 | } | |
7739 | ||
7740 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7741 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
7742 | #undef TARGET_LITTLE_NAME |
7743 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
7744 | #undef ELF_ARCH | |
7745 | #define ELF_ARCH bfd_arch_l1om | |
7746 | ||
7747 | #undef ELF_MACHINE_CODE | |
7748 | #define ELF_MACHINE_CODE EM_L1OM | |
7749 | ||
7750 | #undef ELF_OSABI | |
7751 | ||
7752 | #undef elf64_bed | |
7753 | #define elf64_bed elf64_l1om_bed | |
7754 | ||
7755 | #undef elf_backend_object_p | |
7756 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
7757 | ||
8059fb19 RM |
7758 | /* Restore defaults. */ |
7759 | #undef ELF_MAXPAGESIZE | |
7760 | #undef ELF_MINPAGESIZE | |
7761 | #undef ELF_COMMONPAGESIZE | |
7762 | #define ELF_MAXPAGESIZE 0x200000 | |
7763 | #define ELF_MINPAGESIZE 0x1000 | |
7764 | #define ELF_COMMONPAGESIZE 0x1000 | |
7765 | #undef elf_backend_plt_alignment | |
7766 | #define elf_backend_plt_alignment 4 | |
7767 | #undef elf_backend_arch_data | |
7768 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 7769 | |
8a9036a4 L |
7770 | #include "elf64-target.h" |
7771 | ||
7772 | /* FreeBSD L1OM support. */ | |
7773 | ||
7774 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7775 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
7776 | #undef TARGET_LITTLE_NAME |
7777 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
7778 | ||
7779 | #undef ELF_OSABI | |
7780 | #define ELF_OSABI ELFOSABI_FREEBSD | |
7781 | ||
7782 | #undef elf64_bed | |
7783 | #define elf64_bed elf64_l1om_fbsd_bed | |
7784 | ||
8a9036a4 | 7785 | #include "elf64-target.h" |
351f65ca | 7786 | |
7a9068fe L |
7787 | /* Intel K1OM support. */ |
7788 | ||
7789 | static bfd_boolean | |
7790 | elf64_k1om_elf_object_p (bfd *abfd) | |
7791 | { | |
7792 | /* Set the right machine number for an K1OM elf64 file. */ | |
7793 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
7794 | return TRUE; | |
7795 | } | |
7796 | ||
7797 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7798 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
7799 | #undef TARGET_LITTLE_NAME |
7800 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
7801 | #undef ELF_ARCH | |
7802 | #define ELF_ARCH bfd_arch_k1om | |
7803 | ||
7804 | #undef ELF_MACHINE_CODE | |
7805 | #define ELF_MACHINE_CODE EM_K1OM | |
7806 | ||
7807 | #undef ELF_OSABI | |
7808 | ||
7809 | #undef elf64_bed | |
7810 | #define elf64_bed elf64_k1om_bed | |
7811 | ||
7812 | #undef elf_backend_object_p | |
7813 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
7814 | ||
7815 | #undef elf_backend_static_tls_alignment | |
7816 | ||
7817 | #undef elf_backend_want_plt_sym | |
7818 | #define elf_backend_want_plt_sym 0 | |
7819 | ||
7820 | #include "elf64-target.h" | |
7821 | ||
7822 | /* FreeBSD K1OM support. */ | |
7823 | ||
7824 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7825 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
7826 | #undef TARGET_LITTLE_NAME |
7827 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
7828 | ||
7829 | #undef ELF_OSABI | |
7830 | #define ELF_OSABI ELFOSABI_FREEBSD | |
7831 | ||
7832 | #undef elf64_bed | |
7833 | #define elf64_bed elf64_k1om_fbsd_bed | |
7834 | ||
7835 | #include "elf64-target.h" | |
7836 | ||
351f65ca L |
7837 | /* 32bit x86-64 support. */ |
7838 | ||
351f65ca | 7839 | #undef TARGET_LITTLE_SYM |
6d00b590 | 7840 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
7841 | #undef TARGET_LITTLE_NAME |
7842 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 7843 | #undef elf32_bed |
351f65ca L |
7844 | |
7845 | #undef ELF_ARCH | |
7846 | #define ELF_ARCH bfd_arch_i386 | |
7847 | ||
7848 | #undef ELF_MACHINE_CODE | |
7849 | #define ELF_MACHINE_CODE EM_X86_64 | |
7850 | ||
351f65ca L |
7851 | #undef ELF_OSABI |
7852 | ||
351f65ca L |
7853 | #undef elf_backend_object_p |
7854 | #define elf_backend_object_p \ | |
7855 | elf32_x86_64_elf_object_p | |
7856 | ||
7857 | #undef elf_backend_bfd_from_remote_memory | |
7858 | #define elf_backend_bfd_from_remote_memory \ | |
7859 | _bfd_elf32_bfd_from_remote_memory | |
7860 | ||
7861 | #undef elf_backend_size_info | |
7862 | #define elf_backend_size_info \ | |
7863 | _bfd_elf32_size_info | |
7864 | ||
7865 | #include "elf32-target.h" |