Commit | Line | Data |
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351f65ca | 1 | /* X86-64 specific support for ELF |
b90efa5b | 2 | Copyright (C) 2000-2015 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 NC |
33 | |
34 | #include "elf/x86-64.h" | |
35 | ||
8fd79e71 L |
36 | #ifdef CORE_HEADER |
37 | #include <stdarg.h> | |
38 | #include CORE_HEADER | |
39 | #endif | |
40 | ||
8d88c4ca NC |
41 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
42 | #define MINUS_ONE (~ (bfd_vma) 0) | |
43 | ||
351f65ca L |
44 | /* Since both 32-bit and 64-bit x86-64 encode relocation type in the |
45 | identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get | |
46 | relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE | |
47 | since they are the same. */ | |
48 | ||
49 | #define ABI_64_P(abfd) \ | |
50 | (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64) | |
51 | ||
8d88c4ca | 52 | /* The relocation "howto" table. Order of fields: |
7b81dfbb AJ |
53 | type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow, |
54 | special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */ | |
70256ad8 AJ |
55 | static reloc_howto_type x86_64_elf_howto_table[] = |
56 | { | |
6346d5ca | 57 | HOWTO(R_X86_64_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont, |
b34976b6 AM |
58 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, |
59 | FALSE), | |
60 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
61 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, | |
62 | FALSE), | |
63 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
64 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, | |
65 | TRUE), | |
66 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
67 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, | |
68 | FALSE), | |
69 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
70 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, | |
71 | TRUE), | |
72 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
73 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, | |
74 | FALSE), | |
75 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
76 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, | |
77 | MINUS_ONE, FALSE), | |
78 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
79 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, | |
80 | MINUS_ONE, FALSE), | |
81 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
82 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, | |
83 | MINUS_ONE, FALSE), | |
84 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
85 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, | |
86 | 0xffffffff, TRUE), | |
87 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, | |
88 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
89 | FALSE), | |
90 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
91 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, | |
92 | FALSE), | |
93 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
94 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), | |
b0360d8c | 95 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
b34976b6 | 96 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), |
ac2aa337 | 97 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
b34976b6 AM |
98 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), |
99 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
100 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), | |
101 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
102 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, | |
103 | MINUS_ONE, FALSE), | |
104 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
105 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, | |
106 | MINUS_ONE, FALSE), | |
107 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
108 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, | |
109 | MINUS_ONE, FALSE), | |
110 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
111 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, | |
112 | 0xffffffff, TRUE), | |
113 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
114 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, | |
115 | 0xffffffff, TRUE), | |
ac2aa337 | 116 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
b34976b6 AM |
117 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, |
118 | 0xffffffff, FALSE), | |
119 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
120 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, | |
121 | 0xffffffff, TRUE), | |
122 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
123 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, | |
124 | 0xffffffff, FALSE), | |
d6ab8113 JB |
125 | HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
126 | bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE, | |
127 | TRUE), | |
128 | HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
129 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", | |
130 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
131 | HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
132 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", | |
133 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
7b81dfbb AJ |
134 | HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, |
135 | bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE, | |
136 | FALSE), | |
137 | HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
138 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE, | |
139 | MINUS_ONE, TRUE), | |
140 | HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
141 | bfd_elf_generic_reloc, "R_X86_64_GOTPC64", | |
142 | FALSE, MINUS_ONE, MINUS_ONE, TRUE), | |
143 | HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
144 | bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE, | |
145 | MINUS_ONE, FALSE), | |
146 | HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
147 | bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE, | |
148 | MINUS_ONE, FALSE), | |
1788fc08 L |
149 | HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, |
150 | bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff, | |
151 | FALSE), | |
152 | HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned, | |
153 | bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE, | |
154 | FALSE), | |
67a4f2b7 AO |
155 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0, |
156 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
157 | "R_X86_64_GOTPC32_TLSDESC", | |
158 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
159 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0, | |
160 | complain_overflow_dont, bfd_elf_generic_reloc, | |
161 | "R_X86_64_TLSDESC_CALL", | |
162 | FALSE, 0, 0, FALSE), | |
163 | HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0, | |
164 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
165 | "R_X86_64_TLSDESC", | |
166 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
cbe950e9 L |
167 | HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
168 | bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE, | |
169 | MINUS_ONE, FALSE), | |
64d25c44 L |
170 | HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
171 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE, | |
172 | MINUS_ONE, FALSE), | |
c3320543 L |
173 | HOWTO(R_X86_64_PC32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
174 | bfd_elf_generic_reloc, "R_X86_64_PC32_BND", FALSE, 0xffffffff, 0xffffffff, | |
175 | TRUE), | |
176 | HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
177 | bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", FALSE, 0xffffffff, 0xffffffff, | |
178 | TRUE), | |
fe4770f4 | 179 | |
a33d77bc JB |
180 | /* We have a gap in the reloc numbers here. |
181 | R_X86_64_standard counts the number up to this point, and | |
182 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
183 | R_X86_64_GNU_VT* to form an index into this table. */ | |
c3320543 | 184 | #define R_X86_64_standard (R_X86_64_PLT32_BND + 1) |
a33d77bc JB |
185 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
186 | ||
fe4770f4 | 187 | /* GNU extension to record C++ vtable hierarchy. */ |
b34976b6 AM |
188 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
189 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
190 | |
191 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
192 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
193 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
d7921315 L |
194 | FALSE), |
195 | ||
196 | /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */ | |
197 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
198 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
199 | FALSE) | |
8d88c4ca NC |
200 | }; |
201 | ||
d8045f23 NC |
202 | #define IS_X86_64_PCREL_TYPE(TYPE) \ |
203 | ( ((TYPE) == R_X86_64_PC8) \ | |
204 | || ((TYPE) == R_X86_64_PC16) \ | |
205 | || ((TYPE) == R_X86_64_PC32) \ | |
c3320543 | 206 | || ((TYPE) == R_X86_64_PC32_BND) \ |
d8045f23 NC |
207 | || ((TYPE) == R_X86_64_PC64)) |
208 | ||
8d88c4ca | 209 | /* Map BFD relocs to the x86_64 elf relocs. */ |
70256ad8 AJ |
210 | struct elf_reloc_map |
211 | { | |
8d88c4ca NC |
212 | bfd_reloc_code_real_type bfd_reloc_val; |
213 | unsigned char elf_reloc_val; | |
214 | }; | |
215 | ||
dc810e39 | 216 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 217 | { |
70256ad8 AJ |
218 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
219 | { BFD_RELOC_64, R_X86_64_64, }, | |
220 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
221 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
222 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
223 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
224 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
225 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
226 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
227 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
228 | { BFD_RELOC_32, R_X86_64_32, }, | |
229 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
230 | { BFD_RELOC_16, R_X86_64_16, }, | |
231 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
232 | { BFD_RELOC_8, R_X86_64_8, }, | |
233 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
234 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
235 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
236 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
237 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
238 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
239 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
240 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
241 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
242 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
243 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
244 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
245 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
246 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
247 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
248 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
249 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
1788fc08 L |
250 | { BFD_RELOC_SIZE32, R_X86_64_SIZE32, }, |
251 | { BFD_RELOC_SIZE64, R_X86_64_SIZE64, }, | |
67a4f2b7 AO |
252 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
253 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
254 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
cbe950e9 | 255 | { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, }, |
c3320543 L |
256 | { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND,}, |
257 | { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND,}, | |
fe4770f4 AJ |
258 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
259 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
260 | }; |
261 | ||
67a4f2b7 | 262 | static reloc_howto_type * |
351f65ca | 263 | elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) |
67a4f2b7 AO |
264 | { |
265 | unsigned i; | |
266 | ||
d7921315 L |
267 | if (r_type == (unsigned int) R_X86_64_32) |
268 | { | |
269 | if (ABI_64_P (abfd)) | |
270 | i = r_type; | |
271 | else | |
272 | i = ARRAY_SIZE (x86_64_elf_howto_table) - 1; | |
273 | } | |
274 | else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
275 | || r_type >= (unsigned int) R_X86_64_max) | |
67a4f2b7 AO |
276 | { |
277 | if (r_type >= (unsigned int) R_X86_64_standard) | |
278 | { | |
279 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), | |
280 | abfd, (int) r_type); | |
281 | r_type = R_X86_64_NONE; | |
282 | } | |
283 | i = r_type; | |
284 | } | |
285 | else | |
286 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
287 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
288 | return &x86_64_elf_howto_table[i]; | |
289 | } | |
8d88c4ca NC |
290 | |
291 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
292 | static reloc_howto_type * | |
351f65ca L |
293 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
294 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
295 | { |
296 | unsigned int i; | |
27482721 | 297 | |
8d88c4ca NC |
298 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
299 | i++) | |
300 | { | |
301 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
302 | return elf_x86_64_rtype_to_howto (abfd, |
303 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca | 304 | } |
5860e3f8 | 305 | return NULL; |
8d88c4ca NC |
306 | } |
307 | ||
157090f7 | 308 | static reloc_howto_type * |
d7921315 | 309 | elf_x86_64_reloc_name_lookup (bfd *abfd, |
351f65ca | 310 | const char *r_name) |
157090f7 AM |
311 | { |
312 | unsigned int i; | |
313 | ||
d7921315 L |
314 | if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0) |
315 | { | |
316 | /* Get x32 R_X86_64_32. */ | |
317 | reloc_howto_type *reloc | |
318 | = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1]; | |
319 | BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32); | |
320 | return reloc; | |
321 | } | |
322 | ||
323 | for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++) | |
157090f7 AM |
324 | if (x86_64_elf_howto_table[i].name != NULL |
325 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
326 | return &x86_64_elf_howto_table[i]; | |
327 | ||
328 | return NULL; | |
329 | } | |
330 | ||
8d88c4ca | 331 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 332 | |
8d88c4ca | 333 | static void |
351f65ca L |
334 | elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
335 | Elf_Internal_Rela *dst) | |
8d88c4ca | 336 | { |
67a4f2b7 | 337 | unsigned r_type; |
8d88c4ca | 338 | |
351f65ca L |
339 | r_type = ELF32_R_TYPE (dst->r_info); |
340 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); | |
8d88c4ca NC |
341 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
342 | } | |
70256ad8 | 343 | \f |
3bab7989 | 344 | /* Support for core dump NOTE sections. */ |
b34976b6 | 345 | static bfd_boolean |
351f65ca | 346 | elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
347 | { |
348 | int offset; | |
eea6121a | 349 | size_t size; |
3bab7989 ML |
350 | |
351 | switch (note->descsz) | |
352 | { | |
353 | default: | |
b34976b6 | 354 | return FALSE; |
3bab7989 | 355 | |
bcd823f1 L |
356 | case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */ |
357 | /* pr_cursig */ | |
228e534f | 358 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
bcd823f1 L |
359 | |
360 | /* pr_pid */ | |
228e534f | 361 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
bcd823f1 L |
362 | |
363 | /* pr_reg */ | |
364 | offset = 72; | |
365 | size = 216; | |
366 | ||
367 | break; | |
368 | ||
3bab7989 ML |
369 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ |
370 | /* pr_cursig */ | |
228e534f | 371 | elf_tdata (abfd)->core->signal |
3bab7989 ML |
372 | = bfd_get_16 (abfd, note->descdata + 12); |
373 | ||
374 | /* pr_pid */ | |
228e534f | 375 | elf_tdata (abfd)->core->lwpid |
3bab7989 ML |
376 | = bfd_get_32 (abfd, note->descdata + 32); |
377 | ||
378 | /* pr_reg */ | |
379 | offset = 112; | |
eea6121a | 380 | size = 216; |
3bab7989 ML |
381 | |
382 | break; | |
383 | } | |
384 | ||
385 | /* Make a ".reg/999" section. */ | |
386 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 387 | size, note->descpos + offset); |
3bab7989 ML |
388 | } |
389 | ||
b34976b6 | 390 | static bfd_boolean |
351f65ca | 391 | elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
392 | { |
393 | switch (note->descsz) | |
394 | { | |
395 | default: | |
b34976b6 | 396 | return FALSE; |
3bab7989 | 397 | |
bcd823f1 | 398 | case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */ |
228e534f | 399 | elf_tdata (abfd)->core->pid |
bcd823f1 | 400 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 401 | elf_tdata (abfd)->core->program |
bcd823f1 | 402 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 403 | elf_tdata (abfd)->core->command |
bcd823f1 L |
404 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
405 | break; | |
406 | ||
3bab7989 | 407 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ |
228e534f | 408 | elf_tdata (abfd)->core->pid |
261b8d08 | 409 | = bfd_get_32 (abfd, note->descdata + 24); |
228e534f | 410 | elf_tdata (abfd)->core->program |
3bab7989 | 411 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
228e534f | 412 | elf_tdata (abfd)->core->command |
3bab7989 ML |
413 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
414 | } | |
415 | ||
416 | /* Note that for some reason, a spurious space is tacked | |
417 | onto the end of the args in some (at least one anyway) | |
418 | implementations, so strip it off if it exists. */ | |
419 | ||
420 | { | |
228e534f | 421 | char *command = elf_tdata (abfd)->core->command; |
3bab7989 ML |
422 | int n = strlen (command); |
423 | ||
424 | if (0 < n && command[n - 1] == ' ') | |
425 | command[n - 1] = '\0'; | |
426 | } | |
427 | ||
b34976b6 | 428 | return TRUE; |
3bab7989 | 429 | } |
8fd79e71 L |
430 | |
431 | #ifdef CORE_HEADER | |
432 | static char * | |
433 | elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz, | |
434 | int note_type, ...) | |
435 | { | |
436 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8fd79e71 L |
437 | va_list ap; |
438 | const char *fname, *psargs; | |
439 | long pid; | |
440 | int cursig; | |
441 | const void *gregs; | |
442 | ||
443 | switch (note_type) | |
444 | { | |
445 | default: | |
446 | return NULL; | |
447 | ||
448 | case NT_PRPSINFO: | |
449 | va_start (ap, note_type); | |
450 | fname = va_arg (ap, const char *); | |
451 | psargs = va_arg (ap, const char *); | |
452 | va_end (ap); | |
453 | ||
454 | if (bed->s->elfclass == ELFCLASS32) | |
455 | { | |
456 | prpsinfo32_t data; | |
457 | memset (&data, 0, sizeof (data)); | |
458 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
459 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
460 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
461 | &data, sizeof (data)); | |
8fd79e71 L |
462 | } |
463 | else | |
464 | { | |
b1bd052d | 465 | prpsinfo64_t data; |
8fd79e71 L |
466 | memset (&data, 0, sizeof (data)); |
467 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
468 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
469 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
470 | &data, sizeof (data)); | |
8fd79e71 | 471 | } |
e85c6a70 | 472 | /* NOTREACHED */ |
8fd79e71 L |
473 | |
474 | case NT_PRSTATUS: | |
475 | va_start (ap, note_type); | |
476 | pid = va_arg (ap, long); | |
477 | cursig = va_arg (ap, int); | |
478 | gregs = va_arg (ap, const void *); | |
479 | va_end (ap); | |
480 | ||
481 | if (bed->s->elfclass == ELFCLASS32) | |
482 | { | |
483 | if (bed->elf_machine_code == EM_X86_64) | |
484 | { | |
485 | prstatusx32_t prstat; | |
486 | memset (&prstat, 0, sizeof (prstat)); | |
487 | prstat.pr_pid = pid; | |
488 | prstat.pr_cursig = cursig; | |
489 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
490 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
491 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
492 | } |
493 | else | |
494 | { | |
495 | prstatus32_t prstat; | |
496 | memset (&prstat, 0, sizeof (prstat)); | |
497 | prstat.pr_pid = pid; | |
498 | prstat.pr_cursig = cursig; | |
499 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
500 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
501 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
502 | } |
503 | } | |
504 | else | |
505 | { | |
b1bd052d | 506 | prstatus64_t prstat; |
8fd79e71 L |
507 | memset (&prstat, 0, sizeof (prstat)); |
508 | prstat.pr_pid = pid; | |
509 | prstat.pr_cursig = cursig; | |
510 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
511 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
512 | &prstat, sizeof (prstat)); | |
8fd79e71 | 513 | } |
8fd79e71 | 514 | } |
e85c6a70 | 515 | /* NOTREACHED */ |
8fd79e71 L |
516 | } |
517 | #endif | |
3bab7989 | 518 | \f |
407443a3 | 519 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 520 | |
407443a3 | 521 | /* The name of the dynamic interpreter. This is put in the .interp |
70256ad8 AJ |
522 | section. */ |
523 | ||
351f65ca | 524 | #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
eec9dd95 | 525 | #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1" |
70256ad8 | 526 | |
d40d037c AJ |
527 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
528 | copying dynamic variables from a shared lib into an app's dynbss | |
529 | section, and instead use a dynamic relocation to point into the | |
530 | shared lib. */ | |
531 | #define ELIMINATE_COPY_RELOCS 1 | |
532 | ||
70256ad8 AJ |
533 | /* The size in bytes of an entry in the global offset table. */ |
534 | ||
535 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 536 | |
70256ad8 | 537 | /* The size in bytes of an entry in the procedure linkage table. */ |
8d88c4ca | 538 | |
70256ad8 AJ |
539 | #define PLT_ENTRY_SIZE 16 |
540 | ||
541 | /* The first entry in a procedure linkage table looks like this. See the | |
542 | SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */ | |
543 | ||
351f65ca | 544 | static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] = |
70256ad8 | 545 | { |
653165cc AJ |
546 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
547 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 548 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
549 | }; |
550 | ||
551 | /* Subsequent entries in a procedure linkage table look like this. */ | |
552 | ||
351f65ca | 553 | static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] = |
70256ad8 | 554 | { |
653165cc | 555 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 556 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 557 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
558 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
559 | 0xe9, /* jmp relative */ | |
560 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
561 | }; | |
562 | ||
0ff2b86e L |
563 | /* The first entry in a procedure linkage table with BND relocations |
564 | like this. */ | |
565 | ||
566 | static const bfd_byte elf_x86_64_bnd_plt0_entry[PLT_ENTRY_SIZE] = | |
567 | { | |
568 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
569 | 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */ | |
570 | 0x0f, 0x1f, 0 /* nopl (%rax) */ | |
571 | }; | |
572 | ||
573 | /* Subsequent entries for legacy branches in a procedure linkage table | |
574 | with BND relocations look like this. */ | |
575 | ||
576 | static const bfd_byte elf_x86_64_legacy_plt_entry[PLT_ENTRY_SIZE] = | |
577 | { | |
578 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
579 | 0xe9, 0, 0, 0, 0, /* jmpq relative */ | |
580 | 0x66, 0x0f, 0x1f, 0x44, 0, 0 /* nopw (%rax,%rax,1) */ | |
581 | }; | |
582 | ||
583 | /* Subsequent entries for branches with BND prefx in a procedure linkage | |
584 | table with BND relocations look like this. */ | |
585 | ||
586 | static const bfd_byte elf_x86_64_bnd_plt_entry[PLT_ENTRY_SIZE] = | |
587 | { | |
588 | 0x68, 0, 0, 0, 0, /* pushq immediate */ | |
589 | 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */ | |
590 | 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */ | |
591 | }; | |
592 | ||
593 | /* Entries for legacy branches in the second procedure linkage table | |
594 | look like this. */ | |
595 | ||
596 | static const bfd_byte elf_x86_64_legacy_plt2_entry[8] = | |
597 | { | |
598 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ | |
599 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
600 | 0x66, 0x90 /* xchg %ax,%ax */ | |
601 | }; | |
602 | ||
603 | /* Entries for branches with BND prefix in the second procedure linkage | |
604 | table look like this. */ | |
605 | ||
606 | static const bfd_byte elf_x86_64_bnd_plt2_entry[8] = | |
607 | { | |
608 | 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */ | |
609 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ | |
610 | 0x90 /* nop */ | |
611 | }; | |
612 | ||
e41b3a13 JJ |
613 | /* .eh_frame covering the .plt section. */ |
614 | ||
615 | static const bfd_byte elf_x86_64_eh_frame_plt[] = | |
616 | { | |
617 | #define PLT_CIE_LENGTH 20 | |
618 | #define PLT_FDE_LENGTH 36 | |
619 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
620 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
621 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
622 | 0, 0, 0, 0, /* CIE ID */ | |
623 | 1, /* CIE version */ | |
624 | 'z', 'R', 0, /* Augmentation string */ | |
625 | 1, /* Code alignment factor */ | |
626 | 0x78, /* Data alignment factor */ | |
627 | 16, /* Return address column */ | |
628 | 1, /* Augmentation size */ | |
629 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
630 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
631 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
632 | DW_CFA_nop, DW_CFA_nop, | |
633 | ||
634 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
635 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
636 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
637 | 0, 0, 0, 0, /* .plt size goes here */ | |
638 | 0, /* Augmentation size */ | |
639 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
640 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
641 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
642 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
643 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
644 | 11, /* Block length */ | |
645 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
646 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
647 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
648 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
649 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
650 | }; | |
651 | ||
eed180f8 RM |
652 | /* Architecture-specific backend data for x86-64. */ |
653 | ||
654 | struct elf_x86_64_backend_data | |
655 | { | |
656 | /* Templates for the initial PLT entry and for subsequent entries. */ | |
657 | const bfd_byte *plt0_entry; | |
658 | const bfd_byte *plt_entry; | |
659 | unsigned int plt_entry_size; /* Size of each PLT entry. */ | |
660 | ||
661 | /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */ | |
662 | unsigned int plt0_got1_offset; | |
663 | unsigned int plt0_got2_offset; | |
664 | ||
665 | /* Offset of the end of the PC-relative instruction containing | |
666 | plt0_got2_offset. */ | |
667 | unsigned int plt0_got2_insn_end; | |
668 | ||
669 | /* Offsets into plt_entry that are to be replaced with... */ | |
670 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
671 | unsigned int plt_reloc_offset; /* ... offset into relocation table. */ | |
672 | unsigned int plt_plt_offset; /* ... offset to start of .plt. */ | |
673 | ||
674 | /* Length of the PC-relative instruction containing plt_got_offset. */ | |
675 | unsigned int plt_got_insn_size; | |
676 | ||
677 | /* Offset of the end of the PC-relative jump to plt0_entry. */ | |
678 | unsigned int plt_plt_insn_end; | |
679 | ||
680 | /* Offset into plt_entry where the initial value of the GOT entry points. */ | |
681 | unsigned int plt_lazy_offset; | |
682 | ||
683 | /* .eh_frame covering the .plt section. */ | |
684 | const bfd_byte *eh_frame_plt; | |
685 | unsigned int eh_frame_plt_size; | |
686 | }; | |
687 | ||
f8222080 L |
688 | #define get_elf_x86_64_arch_data(bed) \ |
689 | ((const struct elf_x86_64_backend_data *) (bed)->arch_data) | |
690 | ||
eed180f8 | 691 | #define get_elf_x86_64_backend_data(abfd) \ |
f8222080 | 692 | get_elf_x86_64_arch_data (get_elf_backend_data (abfd)) |
eed180f8 RM |
693 | |
694 | #define GET_PLT_ENTRY_SIZE(abfd) \ | |
695 | get_elf_x86_64_backend_data (abfd)->plt_entry_size | |
696 | ||
697 | /* These are the standard parameters. */ | |
698 | static const struct elf_x86_64_backend_data elf_x86_64_arch_bed = | |
699 | { | |
700 | elf_x86_64_plt0_entry, /* plt0_entry */ | |
701 | elf_x86_64_plt_entry, /* plt_entry */ | |
702 | sizeof (elf_x86_64_plt_entry), /* plt_entry_size */ | |
703 | 2, /* plt0_got1_offset */ | |
704 | 8, /* plt0_got2_offset */ | |
705 | 12, /* plt0_got2_insn_end */ | |
706 | 2, /* plt_got_offset */ | |
707 | 7, /* plt_reloc_offset */ | |
708 | 12, /* plt_plt_offset */ | |
709 | 6, /* plt_got_insn_size */ | |
710 | PLT_ENTRY_SIZE, /* plt_plt_insn_end */ | |
711 | 6, /* plt_lazy_offset */ | |
712 | elf_x86_64_eh_frame_plt, /* eh_frame_plt */ | |
713 | sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */ | |
714 | }; | |
715 | ||
0ff2b86e L |
716 | static const struct elf_x86_64_backend_data elf_x86_64_bnd_arch_bed = |
717 | { | |
718 | elf_x86_64_bnd_plt0_entry, /* plt0_entry */ | |
719 | elf_x86_64_bnd_plt_entry, /* plt_entry */ | |
720 | sizeof (elf_x86_64_bnd_plt_entry), /* plt_entry_size */ | |
721 | 2, /* plt0_got1_offset */ | |
722 | 1+8, /* plt0_got2_offset */ | |
723 | 1+12, /* plt0_got2_insn_end */ | |
724 | 1+2, /* plt_got_offset */ | |
725 | 1, /* plt_reloc_offset */ | |
726 | 7, /* plt_plt_offset */ | |
727 | 1+6, /* plt_got_insn_size */ | |
728 | 11, /* plt_plt_insn_end */ | |
729 | 0, /* plt_lazy_offset */ | |
730 | elf_x86_64_eh_frame_plt, /* eh_frame_plt */ | |
731 | sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */ | |
732 | }; | |
733 | ||
eed180f8 RM |
734 | #define elf_backend_arch_data &elf_x86_64_arch_bed |
735 | ||
70256ad8 AJ |
736 | /* x86-64 ELF linker hash entry. */ |
737 | ||
351f65ca | 738 | struct elf_x86_64_link_hash_entry |
70256ad8 | 739 | { |
c434dee6 | 740 | struct elf_link_hash_entry elf; |
70256ad8 | 741 | |
c434dee6 | 742 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 743 | struct elf_dyn_relocs *dyn_relocs; |
bffbf940 JJ |
744 | |
745 | #define GOT_UNKNOWN 0 | |
746 | #define GOT_NORMAL 1 | |
747 | #define GOT_TLS_GD 2 | |
748 | #define GOT_TLS_IE 3 | |
67a4f2b7 AO |
749 | #define GOT_TLS_GDESC 4 |
750 | #define GOT_TLS_GD_BOTH_P(type) \ | |
751 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
752 | #define GOT_TLS_GD_P(type) \ | |
753 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
754 | #define GOT_TLS_GDESC_P(type) \ | |
755 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
756 | #define GOT_TLS_GD_ANY_P(type) \ | |
757 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
bffbf940 | 758 | unsigned char tls_type; |
67a4f2b7 | 759 | |
bc696fd5 L |
760 | /* TRUE if a weak symbol with a real definition needs a copy reloc. |
761 | When there is a weak symbol with a real definition, the processor | |
762 | independent code will have arranged for us to see the real | |
763 | definition first. We need to copy the needs_copy bit from the | |
764 | real definition and check it when allowing copy reloc in PIE. */ | |
765 | unsigned int needs_copy : 1; | |
766 | ||
0ff2b86e | 767 | /* TRUE if symbol has at least one BND relocation. */ |
bc696fd5 | 768 | unsigned int has_bnd_reloc : 1; |
0ff2b86e | 769 | |
04ebc307 L |
770 | /* Reference count of C/C++ function pointer relocations in read-write |
771 | section which can be resolved at run-time. */ | |
772 | bfd_signed_vma func_pointer_refcount; | |
773 | ||
dd7e64d4 L |
774 | /* Information about the GOT PLT entry. Filled when there are both |
775 | GOT and PLT relocations against the same function. */ | |
776 | union gotplt_union plt_got; | |
777 | ||
0ff2b86e L |
778 | /* Information about the second PLT entry. Filled when has_bnd_reloc is |
779 | set. */ | |
780 | union gotplt_union plt_bnd; | |
781 | ||
67a4f2b7 AO |
782 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, |
783 | starting at the end of the jump table. */ | |
784 | bfd_vma tlsdesc_got; | |
bffbf940 JJ |
785 | }; |
786 | ||
351f65ca L |
787 | #define elf_x86_64_hash_entry(ent) \ |
788 | ((struct elf_x86_64_link_hash_entry *)(ent)) | |
bffbf940 | 789 | |
351f65ca | 790 | struct elf_x86_64_obj_tdata |
bffbf940 JJ |
791 | { |
792 | struct elf_obj_tdata root; | |
793 | ||
794 | /* tls_type for each local got entry. */ | |
795 | char *local_got_tls_type; | |
67a4f2b7 AO |
796 | |
797 | /* GOTPLT entries for TLS descriptors. */ | |
798 | bfd_vma *local_tlsdesc_gotent; | |
70256ad8 AJ |
799 | }; |
800 | ||
351f65ca L |
801 | #define elf_x86_64_tdata(abfd) \ |
802 | ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any) | |
bffbf940 | 803 | |
351f65ca L |
804 | #define elf_x86_64_local_got_tls_type(abfd) \ |
805 | (elf_x86_64_tdata (abfd)->local_got_tls_type) | |
bffbf940 | 806 | |
351f65ca L |
807 | #define elf_x86_64_local_tlsdesc_gotent(abfd) \ |
808 | (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent) | |
bffbf940 | 809 | |
0ffa91dd NC |
810 | #define is_x86_64_elf(bfd) \ |
811 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
812 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 813 | && elf_object_id (bfd) == X86_64_ELF_DATA) |
0ffa91dd NC |
814 | |
815 | static bfd_boolean | |
351f65ca | 816 | elf_x86_64_mkobject (bfd *abfd) |
0ffa91dd | 817 | { |
351f65ca | 818 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata), |
4dfe6ac6 | 819 | X86_64_ELF_DATA); |
0ffa91dd NC |
820 | } |
821 | ||
c434dee6 | 822 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 823 | |
351f65ca | 824 | struct elf_x86_64_link_hash_table |
407443a3 | 825 | { |
c434dee6 | 826 | struct elf_link_hash_table elf; |
70256ad8 | 827 | |
c434dee6 | 828 | /* Short-cuts to get to dynamic linker sections. */ |
c434dee6 AJ |
829 | asection *sdynbss; |
830 | asection *srelbss; | |
e41b3a13 | 831 | asection *plt_eh_frame; |
0ff2b86e | 832 | asection *plt_bnd; |
dd7e64d4 | 833 | asection *plt_got; |
70256ad8 | 834 | |
4dfe6ac6 NC |
835 | union |
836 | { | |
bffbf940 JJ |
837 | bfd_signed_vma refcount; |
838 | bfd_vma offset; | |
839 | } tls_ld_got; | |
840 | ||
67a4f2b7 AO |
841 | /* The amount of space used by the jump slots in the GOT. */ |
842 | bfd_vma sgotplt_jump_table_size; | |
843 | ||
87d72d41 AM |
844 | /* Small local sym cache. */ |
845 | struct sym_cache sym_cache; | |
9f03412a | 846 | |
351f65ca L |
847 | bfd_vma (*r_info) (bfd_vma, bfd_vma); |
848 | bfd_vma (*r_sym) (bfd_vma); | |
248775ba | 849 | unsigned int pointer_r_type; |
351f65ca L |
850 | const char *dynamic_interpreter; |
851 | int dynamic_interpreter_size; | |
852 | ||
9f03412a AO |
853 | /* _TLS_MODULE_BASE_ symbol. */ |
854 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
855 | |
856 | /* Used by local STT_GNU_IFUNC symbols. */ | |
857 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
858 | void * loc_hash_memory; |
859 | ||
860 | /* The offset into splt of the PLT entry for the TLS descriptor | |
861 | resolver. Special values are 0, if not necessary (or not found | |
862 | to be necessary yet), and -1 if needed but not determined | |
863 | yet. */ | |
864 | bfd_vma tlsdesc_plt; | |
865 | /* The offset into sgot of the GOT entry used by the PLT entry | |
866 | above. */ | |
867 | bfd_vma tlsdesc_got; | |
e1f98742 L |
868 | |
869 | /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */ | |
870 | bfd_vma next_jump_slot_index; | |
871 | /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */ | |
872 | bfd_vma next_irelative_index; | |
c434dee6 | 873 | }; |
70256ad8 AJ |
874 | |
875 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca | 876 | |
351f65ca | 877 | #define elf_x86_64_hash_table(p) \ |
4dfe6ac6 | 878 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
351f65ca | 879 | == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL) |
8d88c4ca | 880 | |
351f65ca | 881 | #define elf_x86_64_compute_jump_table_size(htab) \ |
6de2ae4a | 882 | ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE) |
67a4f2b7 | 883 | |
407443a3 | 884 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
885 | |
886 | static struct bfd_hash_entry * | |
351f65ca L |
887 | elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry, |
888 | struct bfd_hash_table *table, | |
889 | const char *string) | |
70256ad8 | 890 | { |
70256ad8 | 891 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
892 | subclass. */ |
893 | if (entry == NULL) | |
894 | { | |
a50b1753 | 895 | entry = (struct bfd_hash_entry *) |
eed180f8 RM |
896 | bfd_hash_allocate (table, |
897 | sizeof (struct elf_x86_64_link_hash_entry)); | |
c434dee6 AJ |
898 | if (entry == NULL) |
899 | return entry; | |
900 | } | |
70256ad8 AJ |
901 | |
902 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
903 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
904 | if (entry != NULL) | |
70256ad8 | 905 | { |
351f65ca | 906 | struct elf_x86_64_link_hash_entry *eh; |
c434dee6 | 907 | |
351f65ca | 908 | eh = (struct elf_x86_64_link_hash_entry *) entry; |
c434dee6 | 909 | eh->dyn_relocs = NULL; |
bffbf940 | 910 | eh->tls_type = GOT_UNKNOWN; |
bc696fd5 L |
911 | eh->needs_copy = 0; |
912 | eh->has_bnd_reloc = 0; | |
04ebc307 | 913 | eh->func_pointer_refcount = 0; |
0ff2b86e | 914 | eh->plt_bnd.offset = (bfd_vma) -1; |
dd7e64d4 | 915 | eh->plt_got.offset = (bfd_vma) -1; |
67a4f2b7 | 916 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
917 | } |
918 | ||
c434dee6 | 919 | return entry; |
70256ad8 AJ |
920 | } |
921 | ||
c25bc9fc L |
922 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
923 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
924 | as global symbol. We reuse indx and dynstr_index for local symbol | |
925 | hash since they aren't used by global symbols in this backend. */ | |
926 | ||
927 | static hashval_t | |
351f65ca | 928 | elf_x86_64_local_htab_hash (const void *ptr) |
c25bc9fc L |
929 | { |
930 | struct elf_link_hash_entry *h | |
931 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 932 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
933 | } |
934 | ||
935 | /* Compare local hash entries. */ | |
936 | ||
937 | static int | |
351f65ca | 938 | elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2) |
c25bc9fc L |
939 | { |
940 | struct elf_link_hash_entry *h1 | |
941 | = (struct elf_link_hash_entry *) ptr1; | |
942 | struct elf_link_hash_entry *h2 | |
943 | = (struct elf_link_hash_entry *) ptr2; | |
944 | ||
945 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
946 | } | |
947 | ||
948 | /* Find and/or create a hash entry for local symbol. */ | |
949 | ||
950 | static struct elf_link_hash_entry * | |
351f65ca L |
951 | elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab, |
952 | bfd *abfd, const Elf_Internal_Rela *rel, | |
953 | bfd_boolean create) | |
c25bc9fc | 954 | { |
351f65ca | 955 | struct elf_x86_64_link_hash_entry e, *ret; |
c25bc9fc | 956 | asection *sec = abfd->sections; |
d2149d72 | 957 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
351f65ca | 958 | htab->r_sym (rel->r_info)); |
c25bc9fc L |
959 | void **slot; |
960 | ||
961 | e.elf.indx = sec->id; | |
351f65ca | 962 | e.elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc L |
963 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, |
964 | create ? INSERT : NO_INSERT); | |
965 | ||
966 | if (!slot) | |
967 | return NULL; | |
968 | ||
969 | if (*slot) | |
970 | { | |
351f65ca | 971 | ret = (struct elf_x86_64_link_hash_entry *) *slot; |
c25bc9fc L |
972 | return &ret->elf; |
973 | } | |
974 | ||
351f65ca | 975 | ret = (struct elf_x86_64_link_hash_entry *) |
c25bc9fc | 976 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, |
351f65ca | 977 | sizeof (struct elf_x86_64_link_hash_entry)); |
c25bc9fc L |
978 | if (ret) |
979 | { | |
980 | memset (ret, 0, sizeof (*ret)); | |
981 | ret->elf.indx = sec->id; | |
351f65ca | 982 | ret->elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc | 983 | ret->elf.dynindx = -1; |
04ebc307 | 984 | ret->func_pointer_refcount = 0; |
dd7e64d4 | 985 | ret->plt_got.offset = (bfd_vma) -1; |
c25bc9fc L |
986 | *slot = ret; |
987 | } | |
988 | return &ret->elf; | |
989 | } | |
990 | ||
68faa637 AM |
991 | /* Destroy an X86-64 ELF linker hash table. */ |
992 | ||
993 | static void | |
d495ab0d | 994 | elf_x86_64_link_hash_table_free (bfd *obfd) |
68faa637 AM |
995 | { |
996 | struct elf_x86_64_link_hash_table *htab | |
d495ab0d | 997 | = (struct elf_x86_64_link_hash_table *) obfd->link.hash; |
68faa637 AM |
998 | |
999 | if (htab->loc_hash_table) | |
1000 | htab_delete (htab->loc_hash_table); | |
1001 | if (htab->loc_hash_memory) | |
1002 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
d495ab0d | 1003 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
1004 | } |
1005 | ||
8d88c4ca NC |
1006 | /* Create an X86-64 ELF linker hash table. */ |
1007 | ||
1008 | static struct bfd_link_hash_table * | |
351f65ca | 1009 | elf_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca | 1010 | { |
351f65ca L |
1011 | struct elf_x86_64_link_hash_table *ret; |
1012 | bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table); | |
8d88c4ca | 1013 | |
7bf52ea2 | 1014 | ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt); |
c434dee6 | 1015 | if (ret == NULL) |
8d88c4ca NC |
1016 | return NULL; |
1017 | ||
eb4ff4d6 | 1018 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
351f65ca L |
1019 | elf_x86_64_link_hash_newfunc, |
1020 | sizeof (struct elf_x86_64_link_hash_entry), | |
4dfe6ac6 | 1021 | X86_64_ELF_DATA)) |
8d88c4ca | 1022 | { |
e2d34d7d | 1023 | free (ret); |
8d88c4ca NC |
1024 | return NULL; |
1025 | } | |
1026 | ||
351f65ca L |
1027 | if (ABI_64_P (abfd)) |
1028 | { | |
1029 | ret->r_info = elf64_r_info; | |
1030 | ret->r_sym = elf64_r_sym; | |
248775ba | 1031 | ret->pointer_r_type = R_X86_64_64; |
351f65ca L |
1032 | ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; |
1033 | ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; | |
1034 | } | |
1035 | else | |
1036 | { | |
1037 | ret->r_info = elf32_r_info; | |
1038 | ret->r_sym = elf32_r_sym; | |
248775ba | 1039 | ret->pointer_r_type = R_X86_64_32; |
351f65ca L |
1040 | ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; |
1041 | ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER; | |
1042 | } | |
1043 | ||
c25bc9fc | 1044 | ret->loc_hash_table = htab_try_create (1024, |
351f65ca L |
1045 | elf_x86_64_local_htab_hash, |
1046 | elf_x86_64_local_htab_eq, | |
c25bc9fc L |
1047 | NULL); |
1048 | ret->loc_hash_memory = objalloc_create (); | |
1049 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
1050 | { | |
d495ab0d | 1051 | elf_x86_64_link_hash_table_free (abfd); |
c25bc9fc L |
1052 | return NULL; |
1053 | } | |
d495ab0d | 1054 | ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free; |
c25bc9fc | 1055 | |
c434dee6 AJ |
1056 | return &ret->elf.root; |
1057 | } | |
1058 | ||
c434dee6 AJ |
1059 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
1060 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
1061 | hash table. */ | |
1062 | ||
b34976b6 | 1063 | static bfd_boolean |
351f65ca L |
1064 | elf_x86_64_create_dynamic_sections (bfd *dynobj, |
1065 | struct bfd_link_info *info) | |
c434dee6 | 1066 | { |
351f65ca | 1067 | struct elf_x86_64_link_hash_table *htab; |
c434dee6 | 1068 | |
c434dee6 | 1069 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 1070 | return FALSE; |
c434dee6 | 1071 | |
351f65ca | 1072 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1073 | if (htab == NULL) |
1074 | return FALSE; | |
1075 | ||
3d4d4302 | 1076 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
9a926d55 | 1077 | if (!htab->sdynbss) |
c434dee6 AJ |
1078 | abort (); |
1079 | ||
0e1862bb | 1080 | if (bfd_link_executable (info)) |
9a926d55 L |
1081 | { |
1082 | /* Always allow copy relocs for building executables. */ | |
9d157cb9 | 1083 | asection *s = bfd_get_linker_section (dynobj, ".rela.bss"); |
9a926d55 L |
1084 | if (s == NULL) |
1085 | { | |
1086 | const struct elf_backend_data *bed = get_elf_backend_data (dynobj); | |
1087 | s = bfd_make_section_anyway_with_flags (dynobj, | |
1088 | ".rela.bss", | |
1089 | (bed->dynamic_sec_flags | |
1090 | | SEC_READONLY)); | |
1091 | if (s == NULL | |
1092 | || ! bfd_set_section_alignment (dynobj, s, | |
1093 | bed->s->log_file_align)) | |
1094 | return FALSE; | |
1095 | } | |
1096 | htab->srelbss = s; | |
1097 | } | |
1098 | ||
e41b3a13 | 1099 | if (!info->no_ld_generated_unwind_info |
2fe0fd06 | 1100 | && htab->plt_eh_frame == NULL |
e4de50d4 | 1101 | && htab->elf.splt != NULL) |
e41b3a13 | 1102 | { |
bbf96e4e L |
1103 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
1104 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1105 | | SEC_LINKER_CREATED); | |
e41b3a13 | 1106 | htab->plt_eh_frame |
bbf96e4e | 1107 | = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags); |
e41b3a13 JJ |
1108 | if (htab->plt_eh_frame == NULL |
1109 | || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3)) | |
1110 | return FALSE; | |
e41b3a13 | 1111 | } |
b34976b6 | 1112 | return TRUE; |
c434dee6 AJ |
1113 | } |
1114 | ||
1115 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
1116 | ||
1117 | static void | |
351f65ca L |
1118 | elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
1119 | struct elf_link_hash_entry *dir, | |
1120 | struct elf_link_hash_entry *ind) | |
c434dee6 | 1121 | { |
351f65ca | 1122 | struct elf_x86_64_link_hash_entry *edir, *eind; |
c434dee6 | 1123 | |
351f65ca L |
1124 | edir = (struct elf_x86_64_link_hash_entry *) dir; |
1125 | eind = (struct elf_x86_64_link_hash_entry *) ind; | |
c434dee6 | 1126 | |
0ff2b86e L |
1127 | if (!edir->has_bnd_reloc) |
1128 | edir->has_bnd_reloc = eind->has_bnd_reloc; | |
1129 | ||
c434dee6 AJ |
1130 | if (eind->dyn_relocs != NULL) |
1131 | { | |
1132 | if (edir->dyn_relocs != NULL) | |
1133 | { | |
e03a8ed8 L |
1134 | struct elf_dyn_relocs **pp; |
1135 | struct elf_dyn_relocs *p; | |
c434dee6 | 1136 | |
fcfa13d2 | 1137 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
1138 | list. Merge any entries against the same section. */ |
1139 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1140 | { | |
e03a8ed8 | 1141 | struct elf_dyn_relocs *q; |
c434dee6 AJ |
1142 | |
1143 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1144 | if (q->sec == p->sec) | |
1145 | { | |
1146 | q->pc_count += p->pc_count; | |
1147 | q->count += p->count; | |
1148 | *pp = p->next; | |
1149 | break; | |
1150 | } | |
1151 | if (q == NULL) | |
1152 | pp = &p->next; | |
1153 | } | |
1154 | *pp = edir->dyn_relocs; | |
1155 | } | |
1156 | ||
1157 | edir->dyn_relocs = eind->dyn_relocs; | |
1158 | eind->dyn_relocs = NULL; | |
1159 | } | |
1160 | ||
bffbf940 JJ |
1161 | if (ind->root.type == bfd_link_hash_indirect |
1162 | && dir->got.refcount <= 0) | |
1163 | { | |
1164 | edir->tls_type = eind->tls_type; | |
1165 | eind->tls_type = GOT_UNKNOWN; | |
1166 | } | |
1167 | ||
d40d037c AJ |
1168 | if (ELIMINATE_COPY_RELOCS |
1169 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1170 | && dir->dynamic_adjusted) |
1171 | { | |
1172 | /* If called to transfer flags for a weakdef during processing | |
1173 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1174 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
1175 | dir->ref_dynamic |= ind->ref_dynamic; | |
1176 | dir->ref_regular |= ind->ref_regular; | |
1177 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1178 | dir->needs_plt |= ind->needs_plt; | |
1179 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1180 | } | |
d40d037c | 1181 | else |
04ebc307 L |
1182 | { |
1183 | if (eind->func_pointer_refcount > 0) | |
1184 | { | |
1185 | edir->func_pointer_refcount += eind->func_pointer_refcount; | |
1186 | eind->func_pointer_refcount = 0; | |
1187 | } | |
1188 | ||
1189 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
1190 | } | |
8d88c4ca NC |
1191 | } |
1192 | ||
b34976b6 | 1193 | static bfd_boolean |
27482721 | 1194 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 1195 | { |
8d88c4ca NC |
1196 | /* Set the right machine number for an x86-64 elf64 file. */ |
1197 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 1198 | return TRUE; |
8d88c4ca NC |
1199 | } |
1200 | ||
8059fb19 RM |
1201 | static bfd_boolean |
1202 | elf32_x86_64_elf_object_p (bfd *abfd) | |
1203 | { | |
1204 | /* Set the right machine number for an x86-64 elf32 file. */ | |
1205 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
1206 | return TRUE; | |
1207 | } | |
1208 | ||
142411ca L |
1209 | /* Return TRUE if the TLS access code sequence support transition |
1210 | from R_TYPE. */ | |
1211 | ||
1212 | static bfd_boolean | |
351f65ca L |
1213 | elf_x86_64_check_tls_transition (bfd *abfd, |
1214 | struct bfd_link_info *info, | |
1215 | asection *sec, | |
1216 | bfd_byte *contents, | |
1217 | Elf_Internal_Shdr *symtab_hdr, | |
1218 | struct elf_link_hash_entry **sym_hashes, | |
1219 | unsigned int r_type, | |
1220 | const Elf_Internal_Rela *rel, | |
1221 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1222 | { |
142411ca L |
1223 | unsigned int val; |
1224 | unsigned long r_symndx; | |
5c98a14e | 1225 | bfd_boolean largepic = FALSE; |
142411ca L |
1226 | struct elf_link_hash_entry *h; |
1227 | bfd_vma offset; | |
351f65ca | 1228 | struct elf_x86_64_link_hash_table *htab; |
142411ca L |
1229 | |
1230 | /* Get the section contents. */ | |
1231 | if (contents == NULL) | |
1232 | { | |
1233 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1234 | contents = elf_section_data (sec)->this_hdr.contents; | |
1235 | else | |
1236 | { | |
1237 | /* FIXME: How to better handle error condition? */ | |
1238 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1239 | return FALSE; | |
bffbf940 | 1240 | |
142411ca L |
1241 | /* Cache the section contents for elf_link_input_bfd. */ |
1242 | elf_section_data (sec)->this_hdr.contents = contents; | |
1243 | } | |
1244 | } | |
1245 | ||
351f65ca | 1246 | htab = elf_x86_64_hash_table (info); |
142411ca | 1247 | offset = rel->r_offset; |
bffbf940 | 1248 | switch (r_type) |
142411ca L |
1249 | { |
1250 | case R_X86_64_TLSGD: | |
1251 | case R_X86_64_TLSLD: | |
1252 | if ((rel + 1) >= relend) | |
1253 | return FALSE; | |
1254 | ||
1255 | if (r_type == R_X86_64_TLSGD) | |
1256 | { | |
52bc799a | 1257 | /* Check transition from GD access model. For 64bit, only |
142411ca L |
1258 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
1259 | .word 0x6666; rex64; call __tls_get_addr | |
52bc799a L |
1260 | can transit to different access model. For 32bit, only |
1261 | leaq foo@tlsgd(%rip), %rdi | |
1262 | .word 0x6666; rex64; call __tls_get_addr | |
5c98a14e JJ |
1263 | can transit to different access model. For largepic |
1264 | we also support: | |
1265 | leaq foo@tlsgd(%rip), %rdi | |
1266 | movabsq $__tls_get_addr@pltoff, %rax | |
1267 | addq $rbx, %rax | |
1268 | call *%rax. */ | |
142411ca | 1269 | |
fa289a5f AM |
1270 | static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 }; |
1271 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; | |
1272 | ||
5c98a14e | 1273 | if ((offset + 12) > sec->size) |
142411ca | 1274 | return FALSE; |
52bc799a | 1275 | |
5c98a14e JJ |
1276 | if (memcmp (contents + offset + 4, call, 4) != 0) |
1277 | { | |
1278 | if (!ABI_64_P (abfd) | |
1279 | || (offset + 19) > sec->size | |
1280 | || offset < 3 | |
1281 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0 | |
1282 | || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0 | |
1283 | || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5) | |
1284 | != 0) | |
1285 | return FALSE; | |
1286 | largepic = TRUE; | |
1287 | } | |
1288 | else if (ABI_64_P (abfd)) | |
52bc799a | 1289 | { |
52bc799a | 1290 | if (offset < 4 |
fa289a5f | 1291 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1292 | return FALSE; |
1293 | } | |
1294 | else | |
1295 | { | |
52bc799a | 1296 | if (offset < 3 |
fa289a5f | 1297 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1298 | return FALSE; |
1299 | } | |
142411ca L |
1300 | } |
1301 | else | |
1302 | { | |
1303 | /* Check transition from LD access model. Only | |
1304 | leaq foo@tlsld(%rip), %rdi; | |
1305 | call __tls_get_addr | |
5c98a14e JJ |
1306 | can transit to different access model. For largepic |
1307 | we also support: | |
1308 | leaq foo@tlsld(%rip), %rdi | |
1309 | movabsq $__tls_get_addr@pltoff, %rax | |
1310 | addq $rbx, %rax | |
1311 | call *%rax. */ | |
142411ca | 1312 | |
fa289a5f | 1313 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1314 | |
1315 | if (offset < 3 || (offset + 9) > sec->size) | |
1316 | return FALSE; | |
1317 | ||
5c98a14e | 1318 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
142411ca | 1319 | return FALSE; |
5c98a14e JJ |
1320 | |
1321 | if (0xe8 != *(contents + offset + 4)) | |
1322 | { | |
1323 | if (!ABI_64_P (abfd) | |
1324 | || (offset + 19) > sec->size | |
1325 | || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0 | |
1326 | || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5) | |
1327 | != 0) | |
1328 | return FALSE; | |
1329 | largepic = TRUE; | |
1330 | } | |
142411ca L |
1331 | } |
1332 | ||
351f65ca | 1333 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1334 | if (r_symndx < symtab_hdr->sh_info) |
1335 | return FALSE; | |
1336 | ||
1337 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
c4fb387b | 1338 | /* Use strncmp to check __tls_get_addr since __tls_get_addr |
eed180f8 | 1339 | may be versioned. */ |
142411ca L |
1340 | return (h != NULL |
1341 | && h->root.root.string != NULL | |
5c98a14e JJ |
1342 | && (largepic |
1343 | ? ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64 | |
1344 | : (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32 | |
1345 | || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32)) | |
c4fb387b L |
1346 | && (strncmp (h->root.root.string, |
1347 | "__tls_get_addr", 14) == 0)); | |
142411ca L |
1348 | |
1349 | case R_X86_64_GOTTPOFF: | |
1350 | /* Check transition from IE access model: | |
4a4c5f25 L |
1351 | mov foo@gottpoff(%rip), %reg |
1352 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1353 | */ |
1354 | ||
4a4c5f25 L |
1355 | /* Check REX prefix first. */ |
1356 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1357 | { | |
1358 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1359 | if (val != 0x48 && val != 0x4c) | |
1360 | { | |
1361 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1362 | if (ABI_64_P (abfd)) | |
1363 | return FALSE; | |
1364 | } | |
1365 | } | |
1366 | else | |
1367 | { | |
1368 | /* X32 may not have any REX prefix. */ | |
1369 | if (ABI_64_P (abfd)) | |
1370 | return FALSE; | |
1371 | if (offset < 2 || (offset + 3) > sec->size) | |
1372 | return FALSE; | |
1373 | } | |
142411ca L |
1374 | |
1375 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1376 | if (val != 0x8b && val != 0x03) | |
1377 | return FALSE; | |
1378 | ||
1379 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1380 | return (val & 0xc7) == 5; | |
1381 | ||
1382 | case R_X86_64_GOTPC32_TLSDESC: | |
1383 | /* Check transition from GDesc access model: | |
1384 | leaq x@tlsdesc(%rip), %rax | |
1385 | ||
1386 | Make sure it's a leaq adding rip to a 32-bit offset | |
1387 | into any register, although it's probably almost always | |
1388 | going to be rax. */ | |
1389 | ||
1390 | if (offset < 3 || (offset + 4) > sec->size) | |
1391 | return FALSE; | |
1392 | ||
1393 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1394 | if ((val & 0xfb) != 0x48) | |
1395 | return FALSE; | |
1396 | ||
1397 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1398 | return FALSE; | |
1399 | ||
1400 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1401 | return (val & 0xc7) == 0x05; | |
1402 | ||
1403 | case R_X86_64_TLSDESC_CALL: | |
1404 | /* Check transition from GDesc access model: | |
1405 | call *x@tlsdesc(%rax) | |
1406 | */ | |
1407 | if (offset + 2 <= sec->size) | |
1408 | { | |
1409 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
fa289a5f AM |
1410 | static const unsigned char call[] = { 0xff, 0x10 }; |
1411 | return memcmp (contents + offset, call, 2) == 0; | |
142411ca L |
1412 | } |
1413 | ||
1414 | return FALSE; | |
1415 | ||
1416 | default: | |
1417 | abort (); | |
1418 | } | |
1419 | } | |
1420 | ||
1421 | /* Return TRUE if the TLS access transition is OK or no transition | |
1422 | will be performed. Update R_TYPE if there is a transition. */ | |
1423 | ||
1424 | static bfd_boolean | |
351f65ca L |
1425 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1426 | asection *sec, bfd_byte *contents, | |
1427 | Elf_Internal_Shdr *symtab_hdr, | |
1428 | struct elf_link_hash_entry **sym_hashes, | |
1429 | unsigned int *r_type, int tls_type, | |
1430 | const Elf_Internal_Rela *rel, | |
1431 | const Elf_Internal_Rela *relend, | |
1432 | struct elf_link_hash_entry *h, | |
1433 | unsigned long r_symndx) | |
142411ca L |
1434 | { |
1435 | unsigned int from_type = *r_type; | |
1436 | unsigned int to_type = from_type; | |
1437 | bfd_boolean check = TRUE; | |
1438 | ||
bb1cb422 L |
1439 | /* Skip TLS transition for functions. */ |
1440 | if (h != NULL | |
1441 | && (h->type == STT_FUNC | |
1442 | || h->type == STT_GNU_IFUNC)) | |
1443 | return TRUE; | |
1444 | ||
142411ca | 1445 | switch (from_type) |
bffbf940 JJ |
1446 | { |
1447 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1448 | case R_X86_64_GOTPC32_TLSDESC: |
1449 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1450 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1451 | if (bfd_link_executable (info)) |
142411ca L |
1452 | { |
1453 | if (h == NULL) | |
1454 | to_type = R_X86_64_TPOFF32; | |
1455 | else | |
1456 | to_type = R_X86_64_GOTTPOFF; | |
1457 | } | |
1458 | ||
351f65ca | 1459 | /* When we are called from elf_x86_64_relocate_section, |
142411ca L |
1460 | CONTENTS isn't NULL and there may be additional transitions |
1461 | based on TLS_TYPE. */ | |
1462 | if (contents != NULL) | |
1463 | { | |
1464 | unsigned int new_to_type = to_type; | |
1465 | ||
0e1862bb | 1466 | if (bfd_link_executable (info) |
142411ca L |
1467 | && h != NULL |
1468 | && h->dynindx == -1 | |
1469 | && tls_type == GOT_TLS_IE) | |
1470 | new_to_type = R_X86_64_TPOFF32; | |
1471 | ||
1472 | if (to_type == R_X86_64_TLSGD | |
1473 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1474 | || to_type == R_X86_64_TLSDESC_CALL) | |
1475 | { | |
1476 | if (tls_type == GOT_TLS_IE) | |
1477 | new_to_type = R_X86_64_GOTTPOFF; | |
1478 | } | |
1479 | ||
1480 | /* We checked the transition before when we were called from | |
351f65ca | 1481 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1482 | transition which hasn't been checked before. */ |
1483 | check = new_to_type != to_type && from_type == to_type; | |
1484 | to_type = new_to_type; | |
1485 | } | |
1486 | ||
1487 | break; | |
1488 | ||
bffbf940 | 1489 | case R_X86_64_TLSLD: |
0e1862bb | 1490 | if (bfd_link_executable (info)) |
142411ca L |
1491 | to_type = R_X86_64_TPOFF32; |
1492 | break; | |
1493 | ||
1494 | default: | |
1495 | return TRUE; | |
bffbf940 JJ |
1496 | } |
1497 | ||
142411ca L |
1498 | /* Return TRUE if there is no transition. */ |
1499 | if (from_type == to_type) | |
1500 | return TRUE; | |
1501 | ||
1502 | /* Check if the transition can be performed. */ | |
1503 | if (check | |
351f65ca L |
1504 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1505 | symtab_hdr, sym_hashes, | |
1506 | from_type, rel, relend)) | |
142411ca | 1507 | { |
2f629d23 | 1508 | reloc_howto_type *from, *to; |
4c544807 | 1509 | const char *name; |
142411ca | 1510 | |
351f65ca L |
1511 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1512 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1513 | |
4c544807 L |
1514 | if (h) |
1515 | name = h->root.root.string; | |
1516 | else | |
1517 | { | |
351f65ca | 1518 | struct elf_x86_64_link_hash_table *htab; |
4dfe6ac6 | 1519 | |
351f65ca | 1520 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1521 | if (htab == NULL) |
1522 | name = "*unknown*"; | |
1523 | else | |
1524 | { | |
1525 | Elf_Internal_Sym *isym; | |
1526 | ||
1527 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1528 | abfd, r_symndx); | |
1529 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1530 | } | |
4c544807 L |
1531 | } |
1532 | ||
142411ca L |
1533 | (*_bfd_error_handler) |
1534 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1535 | "in section `%A' failed"), | |
4c544807 | 1536 | abfd, sec, from->name, to->name, name, |
142411ca L |
1537 | (unsigned long) rel->r_offset); |
1538 | bfd_set_error (bfd_error_bad_value); | |
1539 | return FALSE; | |
1540 | } | |
1541 | ||
1542 | *r_type = to_type; | |
1543 | return TRUE; | |
bffbf940 JJ |
1544 | } |
1545 | ||
c1d11331 L |
1546 | /* Rename some of the generic section flags to better document how they |
1547 | are used here. */ | |
1548 | #define need_convert_mov_to_lea sec_flg0 | |
1549 | ||
70256ad8 | 1550 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1551 | calculate needed space in the global offset table, procedure |
1552 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1553 | |
b34976b6 | 1554 | static bfd_boolean |
351f65ca L |
1555 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1556 | asection *sec, | |
1557 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1558 | { |
351f65ca | 1559 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1560 | Elf_Internal_Shdr *symtab_hdr; |
1561 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1562 | const Elf_Internal_Rela *rel; |
1563 | const Elf_Internal_Rela *rel_end; | |
70256ad8 | 1564 | asection *sreloc; |
dd7e64d4 | 1565 | bfd_boolean use_plt_got; |
70256ad8 | 1566 | |
0e1862bb | 1567 | if (bfd_link_relocatable (info)) |
b34976b6 | 1568 | return TRUE; |
70256ad8 | 1569 | |
0ffa91dd NC |
1570 | BFD_ASSERT (is_x86_64_elf (abfd)); |
1571 | ||
351f65ca | 1572 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1573 | if (htab == NULL) |
1574 | return FALSE; | |
1575 | ||
dd7e64d4 L |
1576 | use_plt_got = get_elf_x86_64_backend_data (abfd) == &elf_x86_64_arch_bed; |
1577 | ||
0ffa91dd | 1578 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1579 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1580 | |
c434dee6 | 1581 | sreloc = NULL; |
cbe950e9 | 1582 | |
70256ad8 AJ |
1583 | rel_end = relocs + sec->reloc_count; |
1584 | for (rel = relocs; rel < rel_end; rel++) | |
1585 | { | |
bffbf940 | 1586 | unsigned int r_type; |
70256ad8 AJ |
1587 | unsigned long r_symndx; |
1588 | struct elf_link_hash_entry *h; | |
4c544807 L |
1589 | Elf_Internal_Sym *isym; |
1590 | const char *name; | |
06a6a421 | 1591 | bfd_boolean size_reloc; |
70256ad8 | 1592 | |
351f65ca L |
1593 | r_symndx = htab->r_sym (rel->r_info); |
1594 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1595 | |
1596 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1597 | { | |
d003868e AM |
1598 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1599 | abfd, r_symndx); | |
b34976b6 | 1600 | return FALSE; |
c434dee6 AJ |
1601 | } |
1602 | ||
70256ad8 | 1603 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1604 | { |
1605 | /* A local symbol. */ | |
c2e61a4e L |
1606 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1607 | abfd, r_symndx); | |
1608 | if (isym == NULL) | |
1609 | return FALSE; | |
c25bc9fc L |
1610 | |
1611 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1612 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1613 | { |
351f65ca L |
1614 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, |
1615 | TRUE); | |
c25bc9fc | 1616 | if (h == NULL) |
c2e61a4e | 1617 | return FALSE; |
6bbec505 | 1618 | |
c25bc9fc L |
1619 | /* Fake a STT_GNU_IFUNC symbol. */ |
1620 | h->type = STT_GNU_IFUNC; | |
1621 | h->def_regular = 1; | |
1622 | h->ref_regular = 1; | |
1623 | h->forced_local = 1; | |
1624 | h->root.type = bfd_link_hash_defined; | |
1625 | } | |
1626 | else | |
1627 | h = NULL; | |
1628 | } | |
70256ad8 | 1629 | else |
71cb9464 | 1630 | { |
4c544807 | 1631 | isym = NULL; |
71cb9464 L |
1632 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1633 | while (h->root.type == bfd_link_hash_indirect | |
1634 | || h->root.type == bfd_link_hash_warning) | |
1635 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1636 | } |
cbe950e9 | 1637 | |
d1534d16 L |
1638 | /* Check invalid x32 relocations. */ |
1639 | if (!ABI_64_P (abfd)) | |
1640 | switch (r_type) | |
1641 | { | |
1642 | default: | |
1643 | break; | |
1644 | ||
d1534d16 L |
1645 | case R_X86_64_DTPOFF64: |
1646 | case R_X86_64_TPOFF64: | |
1647 | case R_X86_64_PC64: | |
1648 | case R_X86_64_GOTOFF64: | |
1649 | case R_X86_64_GOT64: | |
1650 | case R_X86_64_GOTPCREL64: | |
1651 | case R_X86_64_GOTPC64: | |
1652 | case R_X86_64_GOTPLT64: | |
1653 | case R_X86_64_PLTOFF64: | |
1654 | { | |
1655 | if (h) | |
1656 | name = h->root.root.string; | |
1657 | else | |
1658 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1659 | NULL); | |
1660 | (*_bfd_error_handler) | |
1661 | (_("%B: relocation %s against symbol `%s' isn't " | |
1662 | "supported in x32 mode"), abfd, | |
1663 | x86_64_elf_howto_table[r_type].name, name); | |
1664 | bfd_set_error (bfd_error_bad_value); | |
1665 | return FALSE; | |
1666 | } | |
1667 | break; | |
1668 | } | |
1669 | ||
c25bc9fc L |
1670 | if (h != NULL) |
1671 | { | |
cbe950e9 L |
1672 | /* Create the ifunc sections for static executables. If we |
1673 | never see an indirect function symbol nor we are building | |
1674 | a static executable, those sections will be empty and | |
1675 | won't appear in output. */ | |
1676 | switch (r_type) | |
1677 | { | |
1678 | default: | |
1679 | break; | |
1680 | ||
0ff2b86e L |
1681 | case R_X86_64_PC32_BND: |
1682 | case R_X86_64_PLT32_BND: | |
d258b828 IZ |
1683 | case R_X86_64_PC32: |
1684 | case R_X86_64_PLT32: | |
1685 | case R_X86_64_32: | |
1686 | case R_X86_64_64: | |
0ff2b86e L |
1687 | /* MPX PLT is supported only if elf_x86_64_arch_bed |
1688 | is used in 64-bit mode. */ | |
1689 | if (ABI_64_P (abfd) | |
d258b828 IZ |
1690 | && info->bndplt |
1691 | && (get_elf_x86_64_backend_data (abfd) | |
1692 | == &elf_x86_64_arch_bed)) | |
0ff2b86e | 1693 | { |
bc696fd5 | 1694 | elf_x86_64_hash_entry (h)->has_bnd_reloc = 1; |
0ff2b86e L |
1695 | |
1696 | /* Create the second PLT for Intel MPX support. */ | |
1697 | if (htab->plt_bnd == NULL) | |
1698 | { | |
1699 | unsigned int plt_bnd_align; | |
1700 | const struct elf_backend_data *bed; | |
1701 | ||
1702 | bed = get_elf_backend_data (info->output_bfd); | |
6db50b4c L |
1703 | BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry) == 8 |
1704 | && (sizeof (elf_x86_64_bnd_plt2_entry) | |
1705 | == sizeof (elf_x86_64_legacy_plt2_entry))); | |
1706 | plt_bnd_align = 3; | |
0ff2b86e L |
1707 | |
1708 | if (htab->elf.dynobj == NULL) | |
1709 | htab->elf.dynobj = abfd; | |
1710 | htab->plt_bnd | |
1711 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
1712 | ".plt.bnd", | |
1713 | (bed->dynamic_sec_flags | |
1714 | | SEC_ALLOC | |
1715 | | SEC_CODE | |
1716 | | SEC_LOAD | |
1717 | | SEC_READONLY)); | |
1718 | if (htab->plt_bnd == NULL | |
1719 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
1720 | htab->plt_bnd, | |
1721 | plt_bnd_align)) | |
1722 | return FALSE; | |
1723 | } | |
1724 | } | |
1725 | ||
cbe950e9 | 1726 | case R_X86_64_32S: |
cbe950e9 | 1727 | case R_X86_64_PC64: |
cbe950e9 L |
1728 | case R_X86_64_GOTPCREL: |
1729 | case R_X86_64_GOTPCREL64: | |
9d4057ee AM |
1730 | if (htab->elf.dynobj == NULL) |
1731 | htab->elf.dynobj = abfd; | |
1732 | if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) | |
c2e61a4e | 1733 | return FALSE; |
cbe950e9 L |
1734 | break; |
1735 | } | |
1736 | ||
ad1e85de L |
1737 | /* It is referenced by a non-shared object. */ |
1738 | h->ref_regular = 1; | |
61315175 | 1739 | h->root.non_ir_ref = 1; |
13a2df29 L |
1740 | |
1741 | if (h->type == STT_GNU_IFUNC) | |
1742 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
1743 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 1744 | } |
70256ad8 | 1745 | |
351f65ca L |
1746 | if (! elf_x86_64_tls_transition (info, abfd, sec, NULL, |
1747 | symtab_hdr, sym_hashes, | |
1748 | &r_type, GOT_UNKNOWN, | |
1749 | rel, rel_end, h, r_symndx)) | |
c2e61a4e | 1750 | return FALSE; |
142411ca | 1751 | |
bffbf940 | 1752 | switch (r_type) |
70256ad8 | 1753 | { |
bffbf940 JJ |
1754 | case R_X86_64_TLSLD: |
1755 | htab->tls_ld_got.refcount += 1; | |
1756 | goto create_got; | |
1757 | ||
1758 | case R_X86_64_TPOFF32: | |
0e1862bb | 1759 | if (!bfd_link_executable (info) && ABI_64_P (abfd)) |
70256ad8 | 1760 | { |
09a24cbf | 1761 | if (h) |
4c544807 L |
1762 | name = h->root.root.string; |
1763 | else | |
1764 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1765 | NULL); | |
bffbf940 | 1766 | (*_bfd_error_handler) |
d003868e AM |
1767 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
1768 | abfd, | |
4c544807 | 1769 | x86_64_elf_howto_table[r_type].name, name); |
bffbf940 | 1770 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1771 | return FALSE; |
70256ad8 | 1772 | } |
bffbf940 | 1773 | break; |
c434dee6 | 1774 | |
bffbf940 | 1775 | case R_X86_64_GOTTPOFF: |
0e1862bb | 1776 | if (!bfd_link_executable (info)) |
bffbf940 JJ |
1777 | info->flags |= DF_STATIC_TLS; |
1778 | /* Fall through */ | |
70256ad8 | 1779 | |
bffbf940 JJ |
1780 | case R_X86_64_GOT32: |
1781 | case R_X86_64_GOTPCREL: | |
1782 | case R_X86_64_TLSGD: | |
7b81dfbb AJ |
1783 | case R_X86_64_GOT64: |
1784 | case R_X86_64_GOTPCREL64: | |
1785 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
1786 | case R_X86_64_GOTPC32_TLSDESC: |
1787 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
1788 | /* This symbol requires a global offset table entry. */ |
1789 | { | |
1790 | int tls_type, old_tls_type; | |
1791 | ||
1792 | switch (r_type) | |
1793 | { | |
1794 | default: tls_type = GOT_NORMAL; break; | |
1795 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
1796 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
1797 | case R_X86_64_GOTPC32_TLSDESC: |
1798 | case R_X86_64_TLSDESC_CALL: | |
1799 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
1800 | } |
1801 | ||
1802 | if (h != NULL) | |
1803 | { | |
1804 | h->got.refcount += 1; | |
351f65ca | 1805 | old_tls_type = elf_x86_64_hash_entry (h)->tls_type; |
bffbf940 JJ |
1806 | } |
1807 | else | |
1808 | { | |
1809 | bfd_signed_vma *local_got_refcounts; | |
1810 | ||
1811 | /* This is a global offset table entry for a local symbol. */ | |
1812 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1813 | if (local_got_refcounts == NULL) | |
1814 | { | |
1815 | bfd_size_type size; | |
1816 | ||
1817 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1818 | size *= sizeof (bfd_signed_vma) |
1819 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
1820 | local_got_refcounts = ((bfd_signed_vma *) |
1821 | bfd_zalloc (abfd, size)); | |
1822 | if (local_got_refcounts == NULL) | |
c2e61a4e | 1823 | return FALSE; |
bffbf940 | 1824 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
351f65ca | 1825 | elf_x86_64_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 1826 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
351f65ca | 1827 | elf_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 1828 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
1829 | } |
1830 | local_got_refcounts[r_symndx] += 1; | |
1831 | old_tls_type | |
351f65ca | 1832 | = elf_x86_64_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
1833 | } |
1834 | ||
1835 | /* If a TLS symbol is accessed using IE at least once, | |
1836 | there is no point to use dynamic model for it. */ | |
1837 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
1838 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
1839 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 1840 | { |
67a4f2b7 | 1841 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 1842 | tls_type = old_tls_type; |
67a4f2b7 AO |
1843 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1844 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1845 | tls_type |= old_tls_type; | |
bffbf940 JJ |
1846 | else |
1847 | { | |
09a24cbf | 1848 | if (h) |
4c544807 L |
1849 | name = h->root.root.string; |
1850 | else | |
1851 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
1852 | isym, NULL); | |
bffbf940 | 1853 | (*_bfd_error_handler) |
1f7a4e42 | 1854 | (_("%B: '%s' accessed both as normal and thread local symbol"), |
4c544807 | 1855 | abfd, name); |
68c4a57e | 1856 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1857 | return FALSE; |
bffbf940 JJ |
1858 | } |
1859 | } | |
1860 | ||
1861 | if (old_tls_type != tls_type) | |
1862 | { | |
1863 | if (h != NULL) | |
351f65ca | 1864 | elf_x86_64_hash_entry (h)->tls_type = tls_type; |
bffbf940 | 1865 | else |
351f65ca | 1866 | elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
1867 | } |
1868 | } | |
c434dee6 AJ |
1869 | /* Fall through */ |
1870 | ||
d6ab8113 JB |
1871 | case R_X86_64_GOTOFF64: |
1872 | case R_X86_64_GOTPC32: | |
7b81dfbb | 1873 | case R_X86_64_GOTPC64: |
bffbf940 | 1874 | create_got: |
6de2ae4a | 1875 | if (htab->elf.sgot == NULL) |
c434dee6 AJ |
1876 | { |
1877 | if (htab->elf.dynobj == NULL) | |
1878 | htab->elf.dynobj = abfd; | |
6de2ae4a L |
1879 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, |
1880 | info)) | |
c2e61a4e | 1881 | return FALSE; |
c434dee6 | 1882 | } |
70256ad8 AJ |
1883 | break; |
1884 | ||
1885 | case R_X86_64_PLT32: | |
c3320543 | 1886 | case R_X86_64_PLT32_BND: |
70256ad8 | 1887 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
1888 | actually build the entry in adjust_dynamic_symbol, |
1889 | because this might be a case of linking PIC code which is | |
1890 | never referenced by a dynamic object, in which case we | |
1891 | don't need to generate a procedure linkage table entry | |
1892 | after all. */ | |
70256ad8 AJ |
1893 | |
1894 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 1895 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
1896 | if (h == NULL) |
1897 | continue; | |
1898 | ||
f5385ebf | 1899 | h->needs_plt = 1; |
51b64d56 | 1900 | h->plt.refcount += 1; |
70256ad8 AJ |
1901 | break; |
1902 | ||
7b81dfbb AJ |
1903 | case R_X86_64_PLTOFF64: |
1904 | /* This tries to form the 'address' of a function relative | |
1905 | to GOT. For global symbols we need a PLT entry. */ | |
1906 | if (h != NULL) | |
1907 | { | |
1908 | h->needs_plt = 1; | |
1909 | h->plt.refcount += 1; | |
1910 | } | |
1911 | goto create_got; | |
1912 | ||
6a3e1bae L |
1913 | case R_X86_64_SIZE32: |
1914 | case R_X86_64_SIZE64: | |
06a6a421 | 1915 | size_reloc = TRUE; |
6a3e1bae L |
1916 | goto do_size; |
1917 | ||
248775ba L |
1918 | case R_X86_64_32: |
1919 | if (!ABI_64_P (abfd)) | |
1920 | goto pointer; | |
cc78d0af AJ |
1921 | case R_X86_64_8: |
1922 | case R_X86_64_16: | |
70256ad8 | 1923 | case R_X86_64_32S: |
1b71fb54 AJ |
1924 | /* Let's help debug shared library creation. These relocs |
1925 | cannot be used in shared libs. Don't error out for | |
1926 | sections we don't care about, such as debug sections or | |
1927 | non-constant sections. */ | |
0e1862bb | 1928 | if (bfd_link_pic (info) |
1b71fb54 AJ |
1929 | && (sec->flags & SEC_ALLOC) != 0 |
1930 | && (sec->flags & SEC_READONLY) != 0) | |
1931 | { | |
09a24cbf | 1932 | if (h) |
4c544807 L |
1933 | name = h->root.root.string; |
1934 | else | |
1935 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1b71fb54 | 1936 | (*_bfd_error_handler) |
d003868e | 1937 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
4c544807 | 1938 | abfd, x86_64_elf_howto_table[r_type].name, name); |
1b71fb54 | 1939 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1940 | return FALSE; |
1b71fb54 AJ |
1941 | } |
1942 | /* Fall through. */ | |
1943 | ||
c434dee6 AJ |
1944 | case R_X86_64_PC8: |
1945 | case R_X86_64_PC16: | |
70256ad8 | 1946 | case R_X86_64_PC32: |
c3320543 | 1947 | case R_X86_64_PC32_BND: |
d6ab8113 | 1948 | case R_X86_64_PC64: |
1b71fb54 | 1949 | case R_X86_64_64: |
248775ba | 1950 | pointer: |
0e1862bb | 1951 | if (h != NULL && bfd_link_executable (info)) |
c434dee6 AJ |
1952 | { |
1953 | /* If this reloc is in a read-only section, we might | |
1954 | need a copy reloc. We can't check reliably at this | |
1955 | stage whether the section is read-only, as input | |
1956 | sections have not yet been mapped to output sections. | |
1957 | Tentatively set the flag for now, and correct in | |
1958 | adjust_dynamic_symbol. */ | |
f5385ebf | 1959 | h->non_got_ref = 1; |
c434dee6 AJ |
1960 | |
1961 | /* We may need a .plt entry if the function this reloc | |
1962 | refers to is in a shared lib. */ | |
1963 | h->plt.refcount += 1; | |
c3320543 L |
1964 | if (r_type != R_X86_64_PC32 |
1965 | && r_type != R_X86_64_PC32_BND | |
1966 | && r_type != R_X86_64_PC64) | |
04ebc307 L |
1967 | { |
1968 | h->pointer_equality_needed = 1; | |
1969 | /* At run-time, R_X86_64_64 can be resolved for both | |
1970 | x86-64 and x32. But R_X86_64_32 and R_X86_64_32S | |
1971 | can only be resolved for x32. */ | |
1972 | if ((sec->flags & SEC_READONLY) == 0 | |
1973 | && (r_type == R_X86_64_64 | |
1974 | || (!ABI_64_P (abfd) | |
1975 | && (r_type == R_X86_64_32 | |
1976 | || r_type == R_X86_64_32S)))) | |
1977 | { | |
1978 | struct elf_x86_64_link_hash_entry *eh | |
1979 | = (struct elf_x86_64_link_hash_entry *) h; | |
1980 | eh->func_pointer_refcount += 1; | |
1981 | } | |
1982 | } | |
c434dee6 | 1983 | } |
70256ad8 | 1984 | |
06a6a421 | 1985 | size_reloc = FALSE; |
6a3e1bae | 1986 | do_size: |
70256ad8 AJ |
1987 | /* If we are creating a shared library, and this is a reloc |
1988 | against a global symbol, or a non PC relative reloc | |
1989 | against a local symbol, then we need to copy the reloc | |
1990 | into the shared library. However, if we are linking with | |
1991 | -Bsymbolic, we do not need to copy a reloc against a | |
1992 | global symbol which is defined in an object we are | |
407443a3 | 1993 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
1994 | this point we have not seen all the input files, so it is |
1995 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
1996 | later (it is never cleared). In case of a weak definition, |
1997 | DEF_REGULAR may be cleared later by a strong definition in | |
1998 | a shared library. We account for that possibility below by | |
1999 | storing information in the relocs_copied field of the hash | |
2000 | table entry. A similar situation occurs when creating | |
2001 | shared libraries and symbol visibility changes render the | |
31c0ebfe | 2002 | symbol local. |
c434dee6 AJ |
2003 | |
2004 | If on the other hand, we are creating an executable, we | |
2005 | may need to keep relocations for symbols satisfied by a | |
2006 | dynamic library if we manage to avoid copy relocs for the | |
0f88be7a | 2007 | symbol. */ |
0e1862bb | 2008 | if ((bfd_link_pic (info) |
c434dee6 | 2009 | && (sec->flags & SEC_ALLOC) != 0 |
d8045f23 | 2010 | && (! IS_X86_64_PCREL_TYPE (r_type) |
c434dee6 | 2011 | || (h != NULL |
55255dae | 2012 | && (! SYMBOLIC_BIND (info, h) |
c434dee6 | 2013 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 2014 | || !h->def_regular)))) |
d40d037c | 2015 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 2016 | && !bfd_link_pic (info) |
c434dee6 AJ |
2017 | && (sec->flags & SEC_ALLOC) != 0 |
2018 | && h != NULL | |
2019 | && (h->root.type == bfd_link_hash_defweak | |
0f88be7a | 2020 | || !h->def_regular))) |
70256ad8 | 2021 | { |
e03a8ed8 L |
2022 | struct elf_dyn_relocs *p; |
2023 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
2024 | |
2025 | /* We must copy these reloc types into the output file. | |
2026 | Create a reloc section in dynobj and make room for | |
2027 | this reloc. */ | |
70256ad8 AJ |
2028 | if (sreloc == NULL) |
2029 | { | |
c434dee6 AJ |
2030 | if (htab->elf.dynobj == NULL) |
2031 | htab->elf.dynobj = abfd; | |
2032 | ||
83bac4b0 | 2033 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
2034 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
2035 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 2036 | |
70256ad8 | 2037 | if (sreloc == NULL) |
c2e61a4e | 2038 | return FALSE; |
70256ad8 AJ |
2039 | } |
2040 | ||
c434dee6 AJ |
2041 | /* If this is a global symbol, we count the number of |
2042 | relocations we need for this symbol. */ | |
2043 | if (h != NULL) | |
70256ad8 | 2044 | { |
351f65ca | 2045 | head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs; |
c434dee6 AJ |
2046 | } |
2047 | else | |
2048 | { | |
2049 | /* Track dynamic relocs needed for local syms too. | |
2050 | We really need local syms available to do this | |
2051 | easily. Oh well. */ | |
c434dee6 | 2052 | asection *s; |
87d72d41 | 2053 | void **vpp; |
87d72d41 AM |
2054 | |
2055 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2056 | abfd, r_symndx); | |
2057 | if (isym == NULL) | |
2058 | return FALSE; | |
2059 | ||
2060 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 2061 | if (s == NULL) |
87d72d41 | 2062 | s = sec; |
70256ad8 | 2063 | |
e81d3500 DD |
2064 | /* Beware of type punned pointers vs strict aliasing |
2065 | rules. */ | |
2066 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2067 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2068 | } |
70256ad8 | 2069 | |
c434dee6 AJ |
2070 | p = *head; |
2071 | if (p == NULL || p->sec != sec) | |
2072 | { | |
2073 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 2074 | |
e03a8ed8 | 2075 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2076 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2077 | if (p == NULL) |
c2e61a4e | 2078 | return FALSE; |
c434dee6 AJ |
2079 | p->next = *head; |
2080 | *head = p; | |
2081 | p->sec = sec; | |
2082 | p->count = 0; | |
2083 | p->pc_count = 0; | |
70256ad8 | 2084 | } |
c434dee6 AJ |
2085 | |
2086 | p->count += 1; | |
06a6a421 L |
2087 | /* Count size relocation as PC-relative relocation. */ |
2088 | if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc) | |
c434dee6 | 2089 | p->pc_count += 1; |
70256ad8 AJ |
2090 | } |
2091 | break; | |
fe4770f4 AJ |
2092 | |
2093 | /* This relocation describes the C++ object vtable hierarchy. | |
2094 | Reconstruct it for later use during GC. */ | |
2095 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2096 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c2e61a4e | 2097 | return FALSE; |
fe4770f4 AJ |
2098 | break; |
2099 | ||
2100 | /* This relocation describes which C++ vtable entries are actually | |
2101 | used. Record for later use during GC. */ | |
2102 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
2103 | BFD_ASSERT (h != NULL); |
2104 | if (h != NULL | |
2105 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
c2e61a4e | 2106 | return FALSE; |
fe4770f4 | 2107 | break; |
c434dee6 AJ |
2108 | |
2109 | default: | |
2110 | break; | |
70256ad8 | 2111 | } |
dd7e64d4 L |
2112 | |
2113 | if (use_plt_got | |
2114 | && h != NULL | |
2115 | && h->plt.refcount > 0 | |
8ded2ddc L |
2116 | && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
2117 | || h->got.refcount > 0) | |
dd7e64d4 L |
2118 | && htab->plt_got == NULL) |
2119 | { | |
2120 | /* Create the GOT procedure linkage table. */ | |
2121 | unsigned int plt_got_align; | |
2122 | const struct elf_backend_data *bed; | |
2123 | ||
2124 | bed = get_elf_backend_data (info->output_bfd); | |
2125 | BFD_ASSERT (sizeof (elf_x86_64_legacy_plt2_entry) == 8 | |
2126 | && (sizeof (elf_x86_64_bnd_plt2_entry) | |
2127 | == sizeof (elf_x86_64_legacy_plt2_entry))); | |
2128 | plt_got_align = 3; | |
2129 | ||
2130 | if (htab->elf.dynobj == NULL) | |
2131 | htab->elf.dynobj = abfd; | |
2132 | htab->plt_got | |
2133 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
2134 | ".plt.got", | |
2135 | (bed->dynamic_sec_flags | |
2136 | | SEC_ALLOC | |
2137 | | SEC_CODE | |
2138 | | SEC_LOAD | |
2139 | | SEC_READONLY)); | |
2140 | if (htab->plt_got == NULL | |
2141 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
2142 | htab->plt_got, | |
2143 | plt_got_align)) | |
2144 | return FALSE; | |
2145 | } | |
c1d11331 L |
2146 | |
2147 | if (r_type == R_X86_64_GOTPCREL | |
2148 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
2149 | sec->need_convert_mov_to_lea = 1; | |
70256ad8 AJ |
2150 | } |
2151 | ||
b34976b6 | 2152 | return TRUE; |
70256ad8 AJ |
2153 | } |
2154 | ||
2155 | /* Return the section that should be marked against GC for a given | |
407443a3 | 2156 | relocation. */ |
70256ad8 AJ |
2157 | |
2158 | static asection * | |
351f65ca L |
2159 | elf_x86_64_gc_mark_hook (asection *sec, |
2160 | struct bfd_link_info *info, | |
2161 | Elf_Internal_Rela *rel, | |
2162 | struct elf_link_hash_entry *h, | |
2163 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
2164 | { |
2165 | if (h != NULL) | |
351f65ca | 2166 | switch (ELF32_R_TYPE (rel->r_info)) |
07adf181 AM |
2167 | { |
2168 | case R_X86_64_GNU_VTINHERIT: | |
2169 | case R_X86_64_GNU_VTENTRY: | |
2170 | return NULL; | |
2171 | } | |
2172 | ||
2173 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
2174 | } |
2175 | ||
407443a3 | 2176 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 | 2177 | |
b34976b6 | 2178 | static bfd_boolean |
351f65ca L |
2179 | elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, |
2180 | asection *sec, | |
2181 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 2182 | { |
351f65ca | 2183 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2184 | Elf_Internal_Shdr *symtab_hdr; |
2185 | struct elf_link_hash_entry **sym_hashes; | |
2186 | bfd_signed_vma *local_got_refcounts; | |
2187 | const Elf_Internal_Rela *rel, *relend; | |
c434dee6 | 2188 | |
0e1862bb | 2189 | if (bfd_link_relocatable (info)) |
7dda2462 TG |
2190 | return TRUE; |
2191 | ||
351f65ca | 2192 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2193 | if (htab == NULL) |
2194 | return FALSE; | |
2195 | ||
c434dee6 | 2196 | elf_section_data (sec)->local_dynrel = NULL; |
70256ad8 | 2197 | |
0ffa91dd | 2198 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 AJ |
2199 | sym_hashes = elf_sym_hashes (abfd); |
2200 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2201 | ||
351f65ca | 2202 | htab = elf_x86_64_hash_table (info); |
70256ad8 AJ |
2203 | relend = relocs + sec->reloc_count; |
2204 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
2205 | { |
2206 | unsigned long r_symndx; | |
2207 | unsigned int r_type; | |
2208 | struct elf_link_hash_entry *h = NULL; | |
04ebc307 | 2209 | bfd_boolean pointer_reloc; |
70256ad8 | 2210 | |
351f65ca | 2211 | r_symndx = htab->r_sym (rel->r_info); |
26e41594 AM |
2212 | if (r_symndx >= symtab_hdr->sh_info) |
2213 | { | |
26e41594 | 2214 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
2215 | while (h->root.type == bfd_link_hash_indirect |
2216 | || h->root.type == bfd_link_hash_warning) | |
2217 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 2218 | } |
bb1cb422 L |
2219 | else |
2220 | { | |
2221 | /* A local symbol. */ | |
2222 | Elf_Internal_Sym *isym; | |
2223 | ||
2224 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2225 | abfd, r_symndx); | |
2226 | ||
2227 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
2228 | if (isym != NULL | |
82e96e07 | 2229 | && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
bb1cb422 | 2230 | { |
351f65ca | 2231 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE); |
bb1cb422 L |
2232 | if (h == NULL) |
2233 | abort (); | |
2234 | } | |
2235 | } | |
c434dee6 | 2236 | |
3db2e7dd L |
2237 | if (h) |
2238 | { | |
2239 | struct elf_x86_64_link_hash_entry *eh; | |
2240 | struct elf_dyn_relocs **pp; | |
2241 | struct elf_dyn_relocs *p; | |
2242 | ||
2243 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2244 | ||
2245 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
2246 | if (p->sec == sec) | |
2247 | { | |
2248 | /* Everything must go for SEC. */ | |
2249 | *pp = p->next; | |
2250 | break; | |
2251 | } | |
2252 | } | |
2253 | ||
351f65ca L |
2254 | r_type = ELF32_R_TYPE (rel->r_info); |
2255 | if (! elf_x86_64_tls_transition (info, abfd, sec, NULL, | |
2256 | symtab_hdr, sym_hashes, | |
2257 | &r_type, GOT_UNKNOWN, | |
2258 | rel, relend, h, r_symndx)) | |
142411ca L |
2259 | return FALSE; |
2260 | ||
04ebc307 | 2261 | pointer_reloc = FALSE; |
26e41594 AM |
2262 | switch (r_type) |
2263 | { | |
2264 | case R_X86_64_TLSLD: | |
4dfe6ac6 NC |
2265 | if (htab->tls_ld_got.refcount > 0) |
2266 | htab->tls_ld_got.refcount -= 1; | |
26e41594 | 2267 | break; |
c434dee6 | 2268 | |
26e41594 | 2269 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
2270 | case R_X86_64_GOTPC32_TLSDESC: |
2271 | case R_X86_64_TLSDESC_CALL: | |
26e41594 AM |
2272 | case R_X86_64_GOTTPOFF: |
2273 | case R_X86_64_GOT32: | |
2274 | case R_X86_64_GOTPCREL: | |
7b81dfbb AJ |
2275 | case R_X86_64_GOT64: |
2276 | case R_X86_64_GOTPCREL64: | |
2277 | case R_X86_64_GOTPLT64: | |
26e41594 AM |
2278 | if (h != NULL) |
2279 | { | |
2280 | if (h->got.refcount > 0) | |
2281 | h->got.refcount -= 1; | |
bb1cb422 L |
2282 | if (h->type == STT_GNU_IFUNC) |
2283 | { | |
2284 | if (h->plt.refcount > 0) | |
2285 | h->plt.refcount -= 1; | |
2286 | } | |
26e41594 AM |
2287 | } |
2288 | else if (local_got_refcounts != NULL) | |
2289 | { | |
2290 | if (local_got_refcounts[r_symndx] > 0) | |
2291 | local_got_refcounts[r_symndx] -= 1; | |
2292 | } | |
2293 | break; | |
c434dee6 | 2294 | |
26e41594 | 2295 | case R_X86_64_32: |
26e41594 | 2296 | case R_X86_64_32S: |
04ebc307 L |
2297 | pointer_reloc = !ABI_64_P (abfd); |
2298 | goto pointer; | |
2299 | ||
2300 | case R_X86_64_64: | |
2301 | pointer_reloc = TRUE; | |
2302 | case R_X86_64_8: | |
2303 | case R_X86_64_16: | |
26e41594 AM |
2304 | case R_X86_64_PC8: |
2305 | case R_X86_64_PC16: | |
2306 | case R_X86_64_PC32: | |
c3320543 | 2307 | case R_X86_64_PC32_BND: |
d6ab8113 | 2308 | case R_X86_64_PC64: |
1788fc08 L |
2309 | case R_X86_64_SIZE32: |
2310 | case R_X86_64_SIZE64: | |
04ebc307 | 2311 | pointer: |
0e1862bb | 2312 | if (bfd_link_pic (info) |
3db2e7dd | 2313 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
26e41594 AM |
2314 | break; |
2315 | /* Fall thru */ | |
c434dee6 | 2316 | |
26e41594 | 2317 | case R_X86_64_PLT32: |
c3320543 | 2318 | case R_X86_64_PLT32_BND: |
7b81dfbb | 2319 | case R_X86_64_PLTOFF64: |
26e41594 AM |
2320 | if (h != NULL) |
2321 | { | |
2322 | if (h->plt.refcount > 0) | |
2323 | h->plt.refcount -= 1; | |
04ebc307 L |
2324 | if (pointer_reloc && (sec->flags & SEC_READONLY) == 0) |
2325 | { | |
2326 | struct elf_x86_64_link_hash_entry *eh | |
2327 | = (struct elf_x86_64_link_hash_entry *) h; | |
2328 | if (eh->func_pointer_refcount > 0) | |
2329 | eh->func_pointer_refcount -= 1; | |
2330 | } | |
26e41594 AM |
2331 | } |
2332 | break; | |
70256ad8 | 2333 | |
26e41594 AM |
2334 | default: |
2335 | break; | |
2336 | } | |
2337 | } | |
70256ad8 | 2338 | |
b34976b6 | 2339 | return TRUE; |
70256ad8 AJ |
2340 | } |
2341 | ||
2342 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
2343 | regular object. The current definition is in some section of the | |
2344 | dynamic object, but we're not including those sections. We have to | |
2345 | change the definition to something the rest of the link can | |
407443a3 | 2346 | understand. */ |
70256ad8 | 2347 | |
b34976b6 | 2348 | static bfd_boolean |
351f65ca L |
2349 | elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
2350 | struct elf_link_hash_entry *h) | |
70256ad8 | 2351 | { |
351f65ca | 2352 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 | 2353 | asection *s; |
5ca5bb35 L |
2354 | struct elf_x86_64_link_hash_entry *eh; |
2355 | struct elf_dyn_relocs *p; | |
70256ad8 | 2356 | |
cbe950e9 L |
2357 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2358 | if (h->type == STT_GNU_IFUNC) | |
2359 | { | |
73bcf233 L |
2360 | /* All local STT_GNU_IFUNC references must be treate as local |
2361 | calls via local PLT. */ | |
5ca5bb35 L |
2362 | if (h->ref_regular |
2363 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2364 | { | |
73bcf233 | 2365 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2366 | struct elf_dyn_relocs **pp; |
2367 | ||
2368 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2369 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2370 | { | |
2371 | pc_count += p->pc_count; | |
2372 | p->count -= p->pc_count; | |
2373 | p->pc_count = 0; | |
73bcf233 | 2374 | count += p->count; |
5ca5bb35 L |
2375 | if (p->count == 0) |
2376 | *pp = p->next; | |
2377 | else | |
2378 | pp = &p->next; | |
2379 | } | |
2380 | ||
73bcf233 | 2381 | if (pc_count || count) |
5ca5bb35 L |
2382 | { |
2383 | h->needs_plt = 1; | |
5ca5bb35 | 2384 | h->non_got_ref = 1; |
a5479e5f L |
2385 | if (h->plt.refcount <= 0) |
2386 | h->plt.refcount = 1; | |
2387 | else | |
2388 | h->plt.refcount += 1; | |
5ca5bb35 L |
2389 | } |
2390 | } | |
2391 | ||
cbe950e9 L |
2392 | if (h->plt.refcount <= 0) |
2393 | { | |
2394 | h->plt.offset = (bfd_vma) -1; | |
2395 | h->needs_plt = 0; | |
2396 | } | |
2397 | return TRUE; | |
2398 | } | |
2399 | ||
70256ad8 AJ |
2400 | /* If this is a function, put it in the procedure linkage table. We |
2401 | will fill in the contents of the procedure linkage table later, | |
2402 | when we know the address of the .got section. */ | |
2403 | if (h->type == STT_FUNC | |
f5385ebf | 2404 | || h->needs_plt) |
70256ad8 | 2405 | { |
c434dee6 | 2406 | if (h->plt.refcount <= 0 |
27482721 AJ |
2407 | || SYMBOL_CALLS_LOCAL (info, h) |
2408 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2409 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 2410 | { |
70256ad8 AJ |
2411 | /* This case can occur if we saw a PLT32 reloc in an input |
2412 | file, but the symbol was never referred to by a dynamic | |
2413 | object, or if all references were garbage collected. In | |
2414 | such a case, we don't actually need to build a procedure | |
2415 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 2416 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2417 | h->needs_plt = 0; |
70256ad8 AJ |
2418 | } |
2419 | ||
b34976b6 | 2420 | return TRUE; |
70256ad8 | 2421 | } |
bbd7ec4a | 2422 | else |
c434dee6 AJ |
2423 | /* It's possible that we incorrectly decided a .plt reloc was |
2424 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
2425 | check_relocs. We can't decide accurately between function and | |
2426 | non-function syms in check-relocs; Objects loaded later in | |
2427 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2428 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
2429 | |
2430 | /* If this is a weak symbol, and there is a real definition, the | |
2431 | processor independent code will have arranged for us to see the | |
407443a3 | 2432 | real definition first, and we can just use the same value. */ |
f6e332e6 | 2433 | if (h->u.weakdef != NULL) |
70256ad8 | 2434 | { |
f6e332e6 AM |
2435 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2436 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2437 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2438 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 2439 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
bc696fd5 L |
2440 | { |
2441 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2442 | h->non_got_ref = h->u.weakdef->non_got_ref; | |
2443 | eh->needs_copy = h->u.weakdef->needs_copy; | |
2444 | } | |
b34976b6 | 2445 | return TRUE; |
70256ad8 AJ |
2446 | } |
2447 | ||
2448 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 2449 | is not a function. */ |
70256ad8 AJ |
2450 | |
2451 | /* If we are creating a shared library, we must presume that the | |
2452 | only references to the symbol are via the global offset table. | |
2453 | For such cases we need not do anything here; the relocations will | |
407443a3 | 2454 | be handled correctly by relocate_section. */ |
0e1862bb | 2455 | if (!bfd_link_executable (info)) |
b34976b6 | 2456 | return TRUE; |
70256ad8 AJ |
2457 | |
2458 | /* If there are no references to this symbol that do not use the | |
2459 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 2460 | if (!h->non_got_ref) |
b34976b6 | 2461 | return TRUE; |
70256ad8 | 2462 | |
c434dee6 AJ |
2463 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2464 | if (info->nocopyreloc) | |
2465 | { | |
f5385ebf | 2466 | h->non_got_ref = 0; |
b34976b6 | 2467 | return TRUE; |
c434dee6 AJ |
2468 | } |
2469 | ||
31c0ebfe | 2470 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 2471 | { |
351f65ca | 2472 | eh = (struct elf_x86_64_link_hash_entry *) h; |
d40d037c AJ |
2473 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2474 | { | |
2475 | s = p->sec->output_section; | |
2476 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2477 | break; | |
2478 | } | |
2479 | ||
2480 | /* If we didn't find any dynamic relocs in read-only sections, then | |
2481 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
2482 | if (p == NULL) | |
2483 | { | |
f5385ebf | 2484 | h->non_got_ref = 0; |
d40d037c AJ |
2485 | return TRUE; |
2486 | } | |
c434dee6 AJ |
2487 | } |
2488 | ||
70256ad8 | 2489 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 2490 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
2491 | an entry for this symbol in the .dynsym section. The dynamic |
2492 | object will contain position independent code, so all references | |
2493 | from the dynamic object to this symbol will go through the global | |
2494 | offset table. The dynamic linker will use the .dynsym entry to | |
2495 | determine the address it must put in the global offset table, so | |
2496 | both the dynamic object and the regular object will refer to the | |
2497 | same memory location for the variable. */ | |
2498 | ||
351f65ca | 2499 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2500 | if (htab == NULL) |
2501 | return FALSE; | |
70256ad8 AJ |
2502 | |
2503 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
2504 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 2505 | runtime process image. */ |
1d7e9d18 | 2506 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
70256ad8 | 2507 | { |
351f65ca L |
2508 | const struct elf_backend_data *bed; |
2509 | bed = get_elf_backend_data (info->output_bfd); | |
2510 | htab->srelbss->size += bed->s->sizeof_rela; | |
f5385ebf | 2511 | h->needs_copy = 1; |
70256ad8 AJ |
2512 | } |
2513 | ||
c434dee6 | 2514 | s = htab->sdynbss; |
70256ad8 | 2515 | |
6cabe1ea | 2516 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
70256ad8 AJ |
2517 | } |
2518 | ||
c434dee6 AJ |
2519 | /* Allocate space in .plt, .got and associated reloc sections for |
2520 | dynamic relocs. */ | |
2521 | ||
b34976b6 | 2522 | static bfd_boolean |
351f65ca | 2523 | elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
2524 | { |
2525 | struct bfd_link_info *info; | |
351f65ca L |
2526 | struct elf_x86_64_link_hash_table *htab; |
2527 | struct elf_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 2528 | struct elf_dyn_relocs *p; |
351f65ca | 2529 | const struct elf_backend_data *bed; |
eed180f8 | 2530 | unsigned int plt_entry_size; |
c434dee6 | 2531 | |
e92d460e | 2532 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2533 | return TRUE; |
c434dee6 | 2534 | |
351f65ca | 2535 | eh = (struct elf_x86_64_link_hash_entry *) h; |
e92d460e | 2536 | |
c434dee6 | 2537 | info = (struct bfd_link_info *) inf; |
351f65ca | 2538 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2539 | if (htab == NULL) |
2540 | return FALSE; | |
351f65ca | 2541 | bed = get_elf_backend_data (info->output_bfd); |
eed180f8 | 2542 | plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
c434dee6 | 2543 | |
dd7e64d4 L |
2544 | /* We can't use the GOT PLT if pointer equality is needed since |
2545 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
2546 | linker won't update the GOT slot. We will get into an infinite | |
2547 | loop at run-time. */ | |
2548 | if (htab->plt_got != NULL | |
2549 | && h->type != STT_GNU_IFUNC | |
2550 | && !h->pointer_equality_needed | |
2551 | && h->plt.refcount > 0 | |
2552 | && h->got.refcount > 0) | |
2553 | { | |
2554 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
2555 | reloctions. */ | |
2556 | h->plt.offset = (bfd_vma) -1; | |
2557 | ||
2558 | /* Use the GOT PLT. */ | |
2559 | eh->plt_got.refcount = 1; | |
2560 | } | |
2561 | ||
04ebc307 L |
2562 | /* Clear the reference count of function pointer relocations if |
2563 | symbol isn't a normal function. */ | |
2564 | if (h->type != STT_FUNC) | |
2565 | eh->func_pointer_refcount = 0; | |
2566 | ||
cbe950e9 L |
2567 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2568 | here if it is defined and referenced in a non-shared object. */ | |
2569 | if (h->type == STT_GNU_IFUNC | |
2570 | && h->def_regular) | |
0ff2b86e L |
2571 | { |
2572 | if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, | |
2573 | &eh->dyn_relocs, | |
2574 | plt_entry_size, | |
2575 | plt_entry_size, | |
2576 | GOT_ENTRY_SIZE)) | |
2577 | { | |
2578 | asection *s = htab->plt_bnd; | |
2579 | if (h->plt.offset != (bfd_vma) -1 && s != NULL) | |
2580 | { | |
2581 | /* Use the .plt.bnd section if it is created. */ | |
2582 | eh->plt_bnd.offset = s->size; | |
2583 | ||
2584 | /* Make room for this entry in the .plt.bnd section. */ | |
2585 | s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
2586 | } | |
2587 | ||
2588 | return TRUE; | |
2589 | } | |
2590 | else | |
2591 | return FALSE; | |
2592 | } | |
04ebc307 L |
2593 | /* Don't create the PLT entry if there are only function pointer |
2594 | relocations which can be resolved at run-time. */ | |
cbe950e9 | 2595 | else if (htab->elf.dynamic_sections_created |
04ebc307 L |
2596 | && (h->plt.refcount > eh->func_pointer_refcount |
2597 | || eh->plt_got.refcount > 0)) | |
c434dee6 | 2598 | { |
25070364 L |
2599 | bfd_boolean use_plt_got; |
2600 | ||
04ebc307 L |
2601 | /* Clear the reference count of function pointer relocations |
2602 | if PLT is used. */ | |
2603 | eh->func_pointer_refcount = 0; | |
2604 | ||
8ded2ddc | 2605 | if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
25070364 L |
2606 | { |
2607 | /* Don't use the regular PLT for DF_BIND_NOW. */ | |
2608 | h->plt.offset = (bfd_vma) -1; | |
2609 | ||
2610 | /* Use the GOT PLT. */ | |
2611 | h->got.refcount = 1; | |
2612 | eh->plt_got.refcount = 1; | |
2613 | } | |
2614 | ||
2615 | use_plt_got = eh->plt_got.refcount > 0; | |
dd7e64d4 | 2616 | |
c434dee6 AJ |
2617 | /* Make sure this symbol is output as a dynamic symbol. |
2618 | Undefined weak syms won't yet be marked as dynamic. */ | |
2619 | if (h->dynindx == -1 | |
f5385ebf | 2620 | && !h->forced_local) |
c434dee6 | 2621 | { |
c152c796 | 2622 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2623 | return FALSE; |
c434dee6 AJ |
2624 | } |
2625 | ||
0e1862bb | 2626 | if (bfd_link_pic (info) |
27482721 | 2627 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
c434dee6 | 2628 | { |
6de2ae4a | 2629 | asection *s = htab->elf.splt; |
0ff2b86e | 2630 | asection *bnd_s = htab->plt_bnd; |
dd7e64d4 | 2631 | asection *got_s = htab->plt_got; |
c434dee6 | 2632 | |
7c1e8d3e L |
2633 | /* If this is the first .plt entry, make room for the special |
2634 | first entry. The .plt section is used by prelink to undo | |
2635 | prelinking for dynamic relocations. */ | |
2636 | if (s->size == 0) | |
2637 | s->size = plt_entry_size; | |
2638 | ||
dd7e64d4 L |
2639 | if (use_plt_got) |
2640 | eh->plt_got.offset = got_s->size; | |
2641 | else | |
2642 | { | |
2643 | h->plt.offset = s->size; | |
2644 | if (bnd_s) | |
2645 | eh->plt_bnd.offset = bnd_s->size; | |
2646 | } | |
c434dee6 AJ |
2647 | |
2648 | /* If this symbol is not defined in a regular file, and we are | |
2649 | not generating a shared library, then set the symbol to this | |
2650 | location in the .plt. This is required to make function | |
2651 | pointers compare as equal between the normal executable and | |
2652 | the shared library. */ | |
0e1862bb | 2653 | if (! bfd_link_pic (info) |
f5385ebf | 2654 | && !h->def_regular) |
c434dee6 | 2655 | { |
dd7e64d4 | 2656 | if (use_plt_got) |
0ff2b86e | 2657 | { |
dd7e64d4 L |
2658 | /* We need to make a call to the entry of the GOT PLT |
2659 | instead of regular PLT entry. */ | |
2660 | h->root.u.def.section = got_s; | |
2661 | h->root.u.def.value = eh->plt_got.offset; | |
0ff2b86e L |
2662 | } |
2663 | else | |
2664 | { | |
dd7e64d4 L |
2665 | if (bnd_s) |
2666 | { | |
2667 | /* We need to make a call to the entry of the second | |
2668 | PLT instead of regular PLT entry. */ | |
2669 | h->root.u.def.section = bnd_s; | |
2670 | h->root.u.def.value = eh->plt_bnd.offset; | |
2671 | } | |
2672 | else | |
2673 | { | |
2674 | h->root.u.def.section = s; | |
2675 | h->root.u.def.value = h->plt.offset; | |
2676 | } | |
0ff2b86e | 2677 | } |
c434dee6 AJ |
2678 | } |
2679 | ||
2680 | /* Make room for this entry. */ | |
dd7e64d4 L |
2681 | if (use_plt_got) |
2682 | got_s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
2683 | else | |
2684 | { | |
2685 | s->size += plt_entry_size; | |
2686 | if (bnd_s) | |
2687 | bnd_s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
c434dee6 | 2688 | |
dd7e64d4 L |
2689 | /* We also need to make an entry in the .got.plt section, |
2690 | which will be placed in the .got section by the linker | |
2691 | script. */ | |
2692 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; | |
c434dee6 | 2693 | |
dd7e64d4 L |
2694 | /* We also need to make an entry in the .rela.plt |
2695 | section. */ | |
2696 | htab->elf.srelplt->size += bed->s->sizeof_rela; | |
2697 | htab->elf.srelplt->reloc_count++; | |
2698 | } | |
c434dee6 AJ |
2699 | } |
2700 | else | |
2701 | { | |
2702 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 2703 | h->needs_plt = 0; |
c434dee6 AJ |
2704 | } |
2705 | } | |
2706 | else | |
2707 | { | |
2708 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 2709 | h->needs_plt = 0; |
c434dee6 AJ |
2710 | } |
2711 | ||
67a4f2b7 AO |
2712 | eh->tlsdesc_got = (bfd_vma) -1; |
2713 | ||
bffbf940 JJ |
2714 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
2715 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
2716 | if (h->got.refcount > 0 | |
0e1862bb | 2717 | && bfd_link_executable (info) |
bffbf940 | 2718 | && h->dynindx == -1 |
351f65ca | 2719 | && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) |
d8045f23 NC |
2720 | { |
2721 | h->got.offset = (bfd_vma) -1; | |
2722 | } | |
bffbf940 | 2723 | else if (h->got.refcount > 0) |
c434dee6 AJ |
2724 | { |
2725 | asection *s; | |
b34976b6 | 2726 | bfd_boolean dyn; |
351f65ca | 2727 | int tls_type = elf_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
2728 | |
2729 | /* Make sure this symbol is output as a dynamic symbol. | |
2730 | Undefined weak syms won't yet be marked as dynamic. */ | |
2731 | if (h->dynindx == -1 | |
f5385ebf | 2732 | && !h->forced_local) |
c434dee6 | 2733 | { |
c152c796 | 2734 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2735 | return FALSE; |
c434dee6 AJ |
2736 | } |
2737 | ||
67a4f2b7 AO |
2738 | if (GOT_TLS_GDESC_P (tls_type)) |
2739 | { | |
6de2ae4a | 2740 | eh->tlsdesc_got = htab->elf.sgotplt->size |
351f65ca | 2741 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2742 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2743 | h->got.offset = (bfd_vma) -2; |
2744 | } | |
2745 | if (! GOT_TLS_GDESC_P (tls_type) | |
2746 | || GOT_TLS_GD_P (tls_type)) | |
2747 | { | |
6de2ae4a | 2748 | s = htab->elf.sgot; |
67a4f2b7 AO |
2749 | h->got.offset = s->size; |
2750 | s->size += GOT_ENTRY_SIZE; | |
2751 | if (GOT_TLS_GD_P (tls_type)) | |
2752 | s->size += GOT_ENTRY_SIZE; | |
2753 | } | |
c434dee6 | 2754 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 JJ |
2755 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
2756 | and two if global. | |
2757 | R_X86_64_GOTTPOFF needs one dynamic relocation. */ | |
67a4f2b7 | 2758 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 2759 | || tls_type == GOT_TLS_IE) |
351f65ca | 2760 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 | 2761 | else if (GOT_TLS_GD_P (tls_type)) |
351f65ca | 2762 | htab->elf.srelgot->size += 2 * bed->s->sizeof_rela; |
67a4f2b7 AO |
2763 | else if (! GOT_TLS_GDESC_P (tls_type) |
2764 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2765 | || h->root.type != bfd_link_hash_undefweak) | |
0e1862bb | 2766 | && (bfd_link_pic (info) |
27482721 | 2767 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
351f65ca | 2768 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2769 | if (GOT_TLS_GDESC_P (tls_type)) |
2770 | { | |
351f65ca | 2771 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2772 | htab->tlsdesc_plt = (bfd_vma) -1; |
2773 | } | |
c434dee6 AJ |
2774 | } |
2775 | else | |
2776 | h->got.offset = (bfd_vma) -1; | |
2777 | ||
c434dee6 | 2778 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2779 | return TRUE; |
c434dee6 AJ |
2780 | |
2781 | /* In the shared -Bsymbolic case, discard space allocated for | |
2782 | dynamic pc-relative relocs against symbols which turn out to be | |
2783 | defined in regular objects. For the normal shared case, discard | |
2784 | space for pc-relative relocs that have become local due to symbol | |
2785 | visibility changes. */ | |
2786 | ||
0e1862bb | 2787 | if (bfd_link_pic (info)) |
c434dee6 | 2788 | { |
27482721 AJ |
2789 | /* Relocs that use pc_count are those that appear on a call |
2790 | insn, or certain REL relocs that can generated via assembly. | |
2791 | We want calls to protected symbols to resolve directly to the | |
2792 | function rather than going via the plt. If people want | |
2793 | function pointer comparisons to work as expected then they | |
2794 | should avoid writing weird assembly. */ | |
2795 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 2796 | { |
e03a8ed8 | 2797 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
2798 | |
2799 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2800 | { | |
c3ce498c L |
2801 | p->count -= p->pc_count; |
2802 | p->pc_count = 0; | |
c434dee6 AJ |
2803 | if (p->count == 0) |
2804 | *pp = p->next; | |
2805 | else | |
2806 | pp = &p->next; | |
2807 | } | |
2808 | } | |
4e795f50 AM |
2809 | |
2810 | /* Also discard relocs on undefined weak syms with non-default | |
c353e543 | 2811 | visibility. */ |
31c0ebfe | 2812 | if (eh->dyn_relocs != NULL) |
22d606e9 | 2813 | { |
31c0ebfe L |
2814 | if (h->root.type == bfd_link_hash_undefweak) |
2815 | { | |
2816 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2817 | eh->dyn_relocs = NULL; | |
2818 | ||
2819 | /* Make sure undefined weak symbols are output as a dynamic | |
2820 | symbol in PIEs. */ | |
2821 | else if (h->dynindx == -1 | |
2822 | && ! h->forced_local | |
2823 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2824 | return FALSE; | |
2825 | } | |
9d1d54d5 L |
2826 | /* For PIE, discard space for pc-relative relocs against |
2827 | symbols which turn out to need copy relocs. */ | |
0e1862bb | 2828 | else if (bfd_link_executable (info) |
bc696fd5 | 2829 | && (h->needs_copy || eh->needs_copy) |
31c0ebfe L |
2830 | && h->def_dynamic |
2831 | && !h->def_regular) | |
9d1d54d5 L |
2832 | { |
2833 | struct elf_dyn_relocs **pp; | |
2834 | ||
2835 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2836 | { | |
2837 | if (p->pc_count != 0) | |
2838 | *pp = p->next; | |
2839 | else | |
2840 | pp = &p->next; | |
2841 | } | |
2842 | } | |
22d606e9 | 2843 | } |
d8045f23 | 2844 | } |
d40d037c | 2845 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
2846 | { |
2847 | /* For the non-shared case, discard space for relocs against | |
2848 | symbols which turn out to need copy relocs or are not | |
04ebc307 L |
2849 | dynamic. Keep dynamic relocations for run-time function |
2850 | pointer initialization. */ | |
c434dee6 | 2851 | |
04ebc307 | 2852 | if ((!h->non_got_ref || eh->func_pointer_refcount > 0) |
f5385ebf AM |
2853 | && ((h->def_dynamic |
2854 | && !h->def_regular) | |
c434dee6 AJ |
2855 | || (htab->elf.dynamic_sections_created |
2856 | && (h->root.type == bfd_link_hash_undefweak | |
2857 | || h->root.type == bfd_link_hash_undefined)))) | |
2858 | { | |
2859 | /* Make sure this symbol is output as a dynamic symbol. | |
2860 | Undefined weak syms won't yet be marked as dynamic. */ | |
2861 | if (h->dynindx == -1 | |
d8045f23 NC |
2862 | && ! h->forced_local |
2863 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2864 | return FALSE; | |
c434dee6 AJ |
2865 | |
2866 | /* If that succeeded, we know we'll be keeping all the | |
2867 | relocs. */ | |
2868 | if (h->dynindx != -1) | |
2869 | goto keep; | |
2870 | } | |
2871 | ||
2872 | eh->dyn_relocs = NULL; | |
04ebc307 | 2873 | eh->func_pointer_refcount = 0; |
c434dee6 AJ |
2874 | |
2875 | keep: ; | |
2876 | } | |
2877 | ||
2878 | /* Finally, allocate space. */ | |
2879 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2880 | { | |
e7c33416 NC |
2881 | asection * sreloc; |
2882 | ||
cbe950e9 | 2883 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2884 | |
2885 | BFD_ASSERT (sreloc != NULL); | |
2886 | ||
351f65ca | 2887 | sreloc->size += p->count * bed->s->sizeof_rela; |
c434dee6 AJ |
2888 | } |
2889 | ||
b34976b6 | 2890 | return TRUE; |
c434dee6 AJ |
2891 | } |
2892 | ||
c25bc9fc L |
2893 | /* Allocate space in .plt, .got and associated reloc sections for |
2894 | local dynamic relocs. */ | |
2895 | ||
2896 | static bfd_boolean | |
351f65ca | 2897 | elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf) |
c25bc9fc L |
2898 | { |
2899 | struct elf_link_hash_entry *h | |
2900 | = (struct elf_link_hash_entry *) *slot; | |
2901 | ||
2902 | if (h->type != STT_GNU_IFUNC | |
2903 | || !h->def_regular | |
2904 | || !h->ref_regular | |
2905 | || !h->forced_local | |
2906 | || h->root.type != bfd_link_hash_defined) | |
2907 | abort (); | |
2908 | ||
351f65ca | 2909 | return elf_x86_64_allocate_dynrelocs (h, inf); |
c25bc9fc L |
2910 | } |
2911 | ||
c434dee6 AJ |
2912 | /* Find any dynamic relocs that apply to read-only sections. */ |
2913 | ||
b34976b6 | 2914 | static bfd_boolean |
351f65ca L |
2915 | elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h, |
2916 | void * inf) | |
c434dee6 | 2917 | { |
351f65ca | 2918 | struct elf_x86_64_link_hash_entry *eh; |
e03a8ed8 | 2919 | struct elf_dyn_relocs *p; |
c434dee6 | 2920 | |
aa715242 L |
2921 | /* Skip local IFUNC symbols. */ |
2922 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
2923 | return TRUE; | |
2924 | ||
351f65ca | 2925 | eh = (struct elf_x86_64_link_hash_entry *) h; |
c434dee6 AJ |
2926 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2927 | { | |
2928 | asection *s = p->sec->output_section; | |
2929 | ||
2930 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2931 | { | |
2932 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2933 | ||
2934 | info->flags |= DF_TEXTREL; | |
2935 | ||
0e1862bb | 2936 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd L |
2937 | || info->error_textrel) |
2938 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"), | |
b70321a2 L |
2939 | p->sec->owner, h->root.root.string, |
2940 | p->sec); | |
2941 | ||
c434dee6 | 2942 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 2943 | return FALSE; |
c434dee6 AJ |
2944 | } |
2945 | } | |
b34976b6 | 2946 | return TRUE; |
c434dee6 AJ |
2947 | } |
2948 | ||
daa67607 L |
2949 | /* Convert |
2950 | mov foo@GOTPCREL(%rip), %reg | |
2951 | to | |
2952 | lea foo(%rip), %reg | |
2953 | with the local symbol, foo. */ | |
2954 | ||
2955 | static bfd_boolean | |
2956 | elf_x86_64_convert_mov_to_lea (bfd *abfd, asection *sec, | |
2957 | struct bfd_link_info *link_info) | |
2958 | { | |
2959 | Elf_Internal_Shdr *symtab_hdr; | |
2960 | Elf_Internal_Rela *internal_relocs; | |
2961 | Elf_Internal_Rela *irel, *irelend; | |
2962 | bfd_byte *contents; | |
2963 | struct elf_x86_64_link_hash_table *htab; | |
2964 | bfd_boolean changed_contents; | |
2965 | bfd_boolean changed_relocs; | |
2966 | bfd_signed_vma *local_got_refcounts; | |
59cab532 | 2967 | bfd_vma maxpagesize; |
daa67607 L |
2968 | |
2969 | /* Don't even try to convert non-ELF outputs. */ | |
2970 | if (!is_elf_hash_table (link_info->hash)) | |
2971 | return FALSE; | |
2972 | ||
c1d11331 | 2973 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 2974 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
c1d11331 | 2975 | || sec->need_convert_mov_to_lea == 0 |
c8831961 | 2976 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
2977 | return TRUE; |
2978 | ||
2979 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2980 | ||
2981 | /* Load the relocations for this section. */ | |
2982 | internal_relocs = (_bfd_elf_link_read_relocs | |
2983 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
2984 | link_info->keep_memory)); | |
2985 | if (internal_relocs == NULL) | |
2986 | return FALSE; | |
2987 | ||
2988 | htab = elf_x86_64_hash_table (link_info); | |
2989 | changed_contents = FALSE; | |
2990 | changed_relocs = FALSE; | |
2991 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
59cab532 | 2992 | maxpagesize = get_elf_backend_data (abfd)->maxpagesize; |
daa67607 L |
2993 | |
2994 | /* Get the section contents. */ | |
2995 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2996 | contents = elf_section_data (sec)->this_hdr.contents; | |
2997 | else | |
2998 | { | |
2999 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
3000 | goto error_return; | |
3001 | } | |
3002 | ||
3003 | irelend = internal_relocs + sec->reloc_count; | |
3004 | for (irel = internal_relocs; irel < irelend; irel++) | |
3005 | { | |
3006 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
3007 | unsigned int r_symndx = htab->r_sym (irel->r_info); | |
3008 | unsigned int indx; | |
3009 | struct elf_link_hash_entry *h; | |
59cab532 L |
3010 | asection *tsec; |
3011 | char symtype; | |
3012 | bfd_vma toff, roff; | |
dfc87947 | 3013 | unsigned int opcode; |
daa67607 L |
3014 | |
3015 | if (r_type != R_X86_64_GOTPCREL) | |
3016 | continue; | |
3017 | ||
59cab532 L |
3018 | roff = irel->r_offset; |
3019 | ||
dfc87947 L |
3020 | if (roff < 2) |
3021 | continue; | |
3022 | ||
3023 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
3024 | ||
3025 | /* PR ld/18591: Don't convert R_X86_64_GOTPCREL relocation if it | |
3026 | isn't for mov instruction. */ | |
3027 | if (opcode != 0x8b) | |
59cab532 L |
3028 | continue; |
3029 | ||
daa67607 L |
3030 | /* Get the symbol referred to by the reloc. */ |
3031 | if (r_symndx < symtab_hdr->sh_info) | |
3032 | { | |
3033 | Elf_Internal_Sym *isym; | |
3034 | ||
3035 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
3036 | abfd, r_symndx); | |
3037 | ||
59cab532 L |
3038 | symtype = ELF_ST_TYPE (isym->st_info); |
3039 | ||
3040 | /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation and | |
3041 | skip relocation against undefined symbols. */ | |
77697d41 L |
3042 | if (symtype == STT_GNU_IFUNC || isym->st_shndx == SHN_UNDEF) |
3043 | continue; | |
59cab532 | 3044 | |
77697d41 L |
3045 | if (isym->st_shndx == SHN_ABS) |
3046 | tsec = bfd_abs_section_ptr; | |
3047 | else if (isym->st_shndx == SHN_COMMON) | |
3048 | tsec = bfd_com_section_ptr; | |
3049 | else if (isym->st_shndx == SHN_X86_64_LCOMMON) | |
3050 | tsec = &_bfd_elf_large_com_section; | |
3051 | else | |
3052 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
3053 | ||
3054 | h = NULL; | |
3055 | toff = isym->st_value; | |
59cab532 L |
3056 | } |
3057 | else | |
3058 | { | |
3059 | indx = r_symndx - symtab_hdr->sh_info; | |
3060 | h = elf_sym_hashes (abfd)[indx]; | |
3061 | BFD_ASSERT (h != NULL); | |
3062 | ||
3063 | while (h->root.type == bfd_link_hash_indirect | |
3064 | || h->root.type == bfd_link_hash_warning) | |
3065 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3066 | ||
3067 | /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also | |
3068 | avoid optimizing _DYNAMIC since ld.so may use its link-time | |
3069 | address. */ | |
3070 | if (h->def_regular | |
3071 | && h->type != STT_GNU_IFUNC | |
3072 | && h != htab->elf.hdynamic | |
3073 | && SYMBOL_REFERENCES_LOCAL (link_info, h)) | |
3074 | { | |
3075 | tsec = h->root.u.def.section; | |
3076 | toff = h->root.u.def.value; | |
3077 | symtype = h->type; | |
59cab532 | 3078 | } |
77697d41 L |
3079 | else |
3080 | continue; | |
59cab532 L |
3081 | } |
3082 | ||
59cab532 L |
3083 | if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE) |
3084 | { | |
3085 | /* At this stage in linking, no SEC_MERGE symbol has been | |
3086 | adjusted, so all references to such symbols need to be | |
3087 | passed through _bfd_merged_section_offset. (Later, in | |
3088 | relocate_section, all SEC_MERGE symbols *except* for | |
3089 | section symbols have been adjusted.) | |
3090 | ||
3091 | gas may reduce relocations against symbols in SEC_MERGE | |
3092 | sections to a relocation against the section symbol when | |
3093 | the original addend was zero. When the reloc is against | |
3094 | a section symbol we should include the addend in the | |
3095 | offset passed to _bfd_merged_section_offset, since the | |
3096 | location of interest is the original symbol. On the | |
3097 | other hand, an access to "sym+addend" where "sym" is not | |
3098 | a section symbol should not include the addend; Such an | |
3099 | access is presumed to be an offset from "sym"; The | |
3100 | location of interest is just "sym". */ | |
3101 | if (symtype == STT_SECTION) | |
3102 | toff += irel->r_addend; | |
3103 | ||
3104 | toff = _bfd_merged_section_offset (abfd, &tsec, | |
3105 | elf_section_data (tsec)->sec_info, | |
3106 | toff); | |
3107 | ||
3108 | if (symtype != STT_SECTION) | |
3109 | toff += irel->r_addend; | |
3110 | } | |
3111 | else | |
3112 | toff += irel->r_addend; | |
3113 | ||
3114 | /* Don't convert if R_X86_64_PC32 relocation overflows. */ | |
3115 | if (tsec->output_section == sec->output_section) | |
3116 | { | |
3117 | if ((toff - roff + 0x80000000) > 0xffffffff) | |
3118 | continue; | |
3119 | } | |
3120 | else | |
3121 | { | |
3122 | asection *asect; | |
3123 | bfd_size_type size; | |
3124 | ||
3125 | /* At this point, we don't know the load addresses of TSEC | |
3126 | section nor SEC section. We estimate the distrance between | |
3127 | SEC and TSEC. */ | |
3128 | size = 0; | |
3129 | for (asect = sec->output_section; | |
3130 | asect != NULL && asect != tsec->output_section; | |
3131 | asect = asect->next) | |
3132 | { | |
3133 | asection *i; | |
3134 | for (i = asect->output_section->map_head.s; | |
3135 | i != NULL; | |
3136 | i = i->map_head.s) | |
3137 | { | |
3138 | size = align_power (size, i->alignment_power); | |
3139 | size += i->size; | |
3140 | } | |
daa67607 | 3141 | } |
59cab532 L |
3142 | |
3143 | /* Don't convert R_X86_64_GOTPCREL if TSEC isn't placed after | |
3144 | SEC. */ | |
3145 | if (asect == NULL) | |
3146 | continue; | |
3147 | ||
3148 | /* Take PT_GNU_RELRO segment into account by adding | |
3149 | maxpagesize. */ | |
3150 | if ((toff + size + maxpagesize - roff + 0x80000000) | |
3151 | > 0xffffffff) | |
3152 | continue; | |
daa67607 L |
3153 | } |
3154 | ||
59cab532 L |
3155 | bfd_put_8 (abfd, 0x8d, contents + roff - 2); |
3156 | irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32); | |
3157 | changed_contents = TRUE; | |
3158 | changed_relocs = TRUE; | |
3159 | ||
77697d41 | 3160 | if (h) |
59cab532 | 3161 | { |
77697d41 L |
3162 | if (h->got.refcount > 0) |
3163 | h->got.refcount -= 1; | |
59cab532 L |
3164 | } |
3165 | else | |
daa67607 | 3166 | { |
77697d41 L |
3167 | if (local_got_refcounts != NULL |
3168 | && local_got_refcounts[r_symndx] > 0) | |
3169 | local_got_refcounts[r_symndx] -= 1; | |
daa67607 L |
3170 | } |
3171 | } | |
3172 | ||
3173 | if (contents != NULL | |
3174 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3175 | { | |
3176 | if (!changed_contents && !link_info->keep_memory) | |
3177 | free (contents); | |
3178 | else | |
3179 | { | |
3180 | /* Cache the section contents for elf_link_input_bfd. */ | |
3181 | elf_section_data (sec)->this_hdr.contents = contents; | |
3182 | } | |
3183 | } | |
3184 | ||
3185 | if (elf_section_data (sec)->relocs != internal_relocs) | |
3186 | { | |
3187 | if (!changed_relocs) | |
3188 | free (internal_relocs); | |
3189 | else | |
3190 | elf_section_data (sec)->relocs = internal_relocs; | |
3191 | } | |
3192 | ||
3193 | return TRUE; | |
3194 | ||
3195 | error_return: | |
3196 | if (contents != NULL | |
3197 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3198 | free (contents); | |
3199 | if (internal_relocs != NULL | |
3200 | && elf_section_data (sec)->relocs != internal_relocs) | |
3201 | free (internal_relocs); | |
3202 | return FALSE; | |
3203 | } | |
3204 | ||
70256ad8 AJ |
3205 | /* Set the sizes of the dynamic sections. */ |
3206 | ||
b34976b6 | 3207 | static bfd_boolean |
351f65ca L |
3208 | elf_x86_64_size_dynamic_sections (bfd *output_bfd, |
3209 | struct bfd_link_info *info) | |
70256ad8 | 3210 | { |
351f65ca | 3211 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
3212 | bfd *dynobj; |
3213 | asection *s; | |
b34976b6 | 3214 | bfd_boolean relocs; |
c434dee6 | 3215 | bfd *ibfd; |
351f65ca | 3216 | const struct elf_backend_data *bed; |
70256ad8 | 3217 | |
351f65ca | 3218 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3219 | if (htab == NULL) |
3220 | return FALSE; | |
351f65ca | 3221 | bed = get_elf_backend_data (output_bfd); |
4dfe6ac6 | 3222 | |
c434dee6 AJ |
3223 | dynobj = htab->elf.dynobj; |
3224 | if (dynobj == NULL) | |
3225 | abort (); | |
70256ad8 | 3226 | |
c434dee6 | 3227 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
3228 | { |
3229 | /* Set the contents of the .interp section to the interpreter. */ | |
9b8b325a | 3230 | if (bfd_link_executable (info) && !info->nointerp) |
70256ad8 | 3231 | { |
3d4d4302 | 3232 | s = bfd_get_linker_section (dynobj, ".interp"); |
c434dee6 AJ |
3233 | if (s == NULL) |
3234 | abort (); | |
351f65ca L |
3235 | s->size = htab->dynamic_interpreter_size; |
3236 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
70256ad8 AJ |
3237 | } |
3238 | } | |
70256ad8 | 3239 | |
c434dee6 AJ |
3240 | /* Set up .got offsets for local syms, and space for local dynamic |
3241 | relocs. */ | |
c72f2fb2 | 3242 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
70256ad8 | 3243 | { |
c434dee6 AJ |
3244 | bfd_signed_vma *local_got; |
3245 | bfd_signed_vma *end_local_got; | |
bffbf940 | 3246 | char *local_tls_type; |
67a4f2b7 | 3247 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
3248 | bfd_size_type locsymcount; |
3249 | Elf_Internal_Shdr *symtab_hdr; | |
3250 | asection *srel; | |
70256ad8 | 3251 | |
0ffa91dd | 3252 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
3253 | continue; |
3254 | ||
c434dee6 | 3255 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 3256 | { |
e03a8ed8 | 3257 | struct elf_dyn_relocs *p; |
c434dee6 | 3258 | |
daa67607 L |
3259 | if (!elf_x86_64_convert_mov_to_lea (ibfd, s, info)) |
3260 | return FALSE; | |
3261 | ||
e03a8ed8 | 3262 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 3263 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
3264 | p != NULL; |
3265 | p = p->next) | |
70256ad8 | 3266 | { |
c434dee6 AJ |
3267 | if (!bfd_is_abs_section (p->sec) |
3268 | && bfd_is_abs_section (p->sec->output_section)) | |
3269 | { | |
3270 | /* Input section has been discarded, either because | |
3271 | it is a copy of a linkonce section or due to | |
3272 | linker script /DISCARD/, so we'll be discarding | |
3273 | the relocs too. */ | |
3274 | } | |
3275 | else if (p->count != 0) | |
3276 | { | |
3277 | srel = elf_section_data (p->sec)->sreloc; | |
351f65ca | 3278 | srel->size += p->count * bed->s->sizeof_rela; |
4b819e1f L |
3279 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
3280 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
3281 | { |
3282 | info->flags |= DF_TEXTREL; | |
0e1862bb | 3283 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd L |
3284 | || info->error_textrel) |
3285 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), | |
b70321a2 | 3286 | p->sec->owner, p->sec); |
b70321a2 | 3287 | } |
c434dee6 | 3288 | } |
70256ad8 AJ |
3289 | } |
3290 | } | |
c434dee6 AJ |
3291 | |
3292 | local_got = elf_local_got_refcounts (ibfd); | |
3293 | if (!local_got) | |
3294 | continue; | |
3295 | ||
0ffa91dd | 3296 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
3297 | locsymcount = symtab_hdr->sh_info; |
3298 | end_local_got = local_got + locsymcount; | |
351f65ca L |
3299 | local_tls_type = elf_x86_64_local_got_tls_type (ibfd); |
3300 | local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd); | |
6de2ae4a L |
3301 | s = htab->elf.sgot; |
3302 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
3303 | for (; local_got < end_local_got; |
3304 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 3305 | { |
67a4f2b7 | 3306 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 3307 | if (*local_got > 0) |
70256ad8 | 3308 | { |
67a4f2b7 AO |
3309 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
3310 | { | |
6de2ae4a | 3311 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
351f65ca | 3312 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 3313 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
3314 | *local_got = (bfd_vma) -2; |
3315 | } | |
3316 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3317 | || GOT_TLS_GD_P (*local_tls_type)) | |
3318 | { | |
3319 | *local_got = s->size; | |
3320 | s->size += GOT_ENTRY_SIZE; | |
3321 | if (GOT_TLS_GD_P (*local_tls_type)) | |
3322 | s->size += GOT_ENTRY_SIZE; | |
3323 | } | |
0e1862bb | 3324 | if (bfd_link_pic (info) |
67a4f2b7 | 3325 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 3326 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
3327 | { |
3328 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
3329 | { | |
6de2ae4a | 3330 | htab->elf.srelplt->size |
351f65ca | 3331 | += bed->s->sizeof_rela; |
67a4f2b7 AO |
3332 | htab->tlsdesc_plt = (bfd_vma) -1; |
3333 | } | |
3334 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3335 | || GOT_TLS_GD_P (*local_tls_type)) | |
351f65ca | 3336 | srel->size += bed->s->sizeof_rela; |
67a4f2b7 | 3337 | } |
70256ad8 AJ |
3338 | } |
3339 | else | |
c434dee6 AJ |
3340 | *local_got = (bfd_vma) -1; |
3341 | } | |
3342 | } | |
70256ad8 | 3343 | |
bffbf940 JJ |
3344 | if (htab->tls_ld_got.refcount > 0) |
3345 | { | |
3346 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
3347 | relocs. */ | |
6de2ae4a L |
3348 | htab->tls_ld_got.offset = htab->elf.sgot->size; |
3349 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; | |
351f65ca | 3350 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
bffbf940 JJ |
3351 | } |
3352 | else | |
3353 | htab->tls_ld_got.offset = -1; | |
3354 | ||
c434dee6 AJ |
3355 | /* Allocate global sym .plt and .got entries, and space for global |
3356 | sym dynamic relocs. */ | |
351f65ca | 3357 | elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs, |
eb4ff4d6 | 3358 | info); |
c434dee6 | 3359 | |
c25bc9fc L |
3360 | /* Allocate .plt and .got entries, and space for local symbols. */ |
3361 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 3362 | elf_x86_64_allocate_local_dynrelocs, |
c25bc9fc L |
3363 | info); |
3364 | ||
67a4f2b7 AO |
3365 | /* For every jump slot reserved in the sgotplt, reloc_count is |
3366 | incremented. However, when we reserve space for TLS descriptors, | |
3367 | it's not incremented, so in order to compute the space reserved | |
3368 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 L |
3369 | slot size. |
3370 | ||
3371 | PR ld/13302: We start next_irelative_index at the end of .rela.plt | |
3372 | so that R_X86_64_IRELATIVE entries come last. */ | |
6de2ae4a | 3373 | if (htab->elf.srelplt) |
e1f98742 L |
3374 | { |
3375 | htab->sgotplt_jump_table_size | |
3376 | = elf_x86_64_compute_jump_table_size (htab); | |
3377 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
3378 | } | |
3379 | else if (htab->elf.irelplt) | |
3380 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
67a4f2b7 AO |
3381 | |
3382 | if (htab->tlsdesc_plt) | |
3383 | { | |
3384 | /* If we're not using lazy TLS relocations, don't generate the | |
3385 | PLT and GOT entries they require. */ | |
3386 | if ((info->flags & DF_BIND_NOW)) | |
3387 | htab->tlsdesc_plt = 0; | |
3388 | else | |
3389 | { | |
6de2ae4a L |
3390 | htab->tlsdesc_got = htab->elf.sgot->size; |
3391 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
3392 | /* Reserve room for the initial entry. |
3393 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a | 3394 | if (htab->elf.splt->size == 0) |
eed180f8 | 3395 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
6de2ae4a | 3396 | htab->tlsdesc_plt = htab->elf.splt->size; |
eed180f8 | 3397 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
67a4f2b7 AO |
3398 | } |
3399 | } | |
3400 | ||
a7b16ceb L |
3401 | if (htab->elf.sgotplt) |
3402 | { | |
3403 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
eed180f8 | 3404 | entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
3405 | if ((htab->elf.hgot == NULL |
3406 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
3407 | && (htab->elf.sgotplt->size |
3408 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
3409 | && (htab->elf.splt == NULL |
3410 | || htab->elf.splt->size == 0) | |
3411 | && (htab->elf.sgot == NULL | |
3412 | || htab->elf.sgot->size == 0) | |
3413 | && (htab->elf.iplt == NULL | |
3414 | || htab->elf.iplt->size == 0) | |
3415 | && (htab->elf.igotplt == NULL | |
3416 | || htab->elf.igotplt->size == 0)) | |
3417 | htab->elf.sgotplt->size = 0; | |
3418 | } | |
3419 | ||
9a2a56cc AM |
3420 | if (htab->plt_eh_frame != NULL |
3421 | && htab->elf.splt != NULL | |
3422 | && htab->elf.splt->size != 0 | |
3423 | && !bfd_is_abs_section (htab->elf.splt->output_section) | |
3424 | && _bfd_elf_eh_frame_present (info)) | |
3425 | { | |
3426 | const struct elf_x86_64_backend_data *arch_data | |
f8222080 | 3427 | = get_elf_x86_64_arch_data (bed); |
9a2a56cc AM |
3428 | htab->plt_eh_frame->size = arch_data->eh_frame_plt_size; |
3429 | } | |
3430 | ||
c434dee6 AJ |
3431 | /* We now have determined the sizes of the various dynamic sections. |
3432 | Allocate memory for them. */ | |
b34976b6 | 3433 | relocs = FALSE; |
c434dee6 AJ |
3434 | for (s = dynobj->sections; s != NULL; s = s->next) |
3435 | { | |
3436 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3437 | continue; | |
3438 | ||
6de2ae4a L |
3439 | if (s == htab->elf.splt |
3440 | || s == htab->elf.sgot | |
3441 | || s == htab->elf.sgotplt | |
3442 | || s == htab->elf.iplt | |
3443 | || s == htab->elf.igotplt | |
0ff2b86e | 3444 | || s == htab->plt_bnd |
dd7e64d4 | 3445 | || s == htab->plt_got |
9a2a56cc | 3446 | || s == htab->plt_eh_frame |
75ff4589 | 3447 | || s == htab->sdynbss) |
c434dee6 AJ |
3448 | { |
3449 | /* Strip this section if we don't need it; see the | |
3450 | comment below. */ | |
3451 | } | |
0112cd26 | 3452 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 3453 | { |
6de2ae4a | 3454 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 3455 | relocs = TRUE; |
c434dee6 AJ |
3456 | |
3457 | /* We use the reloc_count field as a counter if we need | |
3458 | to copy relocs into the output file. */ | |
6de2ae4a | 3459 | if (s != htab->elf.srelplt) |
67a4f2b7 | 3460 | s->reloc_count = 0; |
70256ad8 | 3461 | } |
c434dee6 | 3462 | else |
70256ad8 AJ |
3463 | { |
3464 | /* It's not one of our sections, so don't allocate space. */ | |
3465 | continue; | |
3466 | } | |
3467 | ||
eea6121a | 3468 | if (s->size == 0) |
70256ad8 | 3469 | { |
c434dee6 AJ |
3470 | /* If we don't need this section, strip it from the |
3471 | output file. This is mostly to handle .rela.bss and | |
3472 | .rela.plt. We must create both sections in | |
3473 | create_dynamic_sections, because they must be created | |
3474 | before the linker maps input sections to output | |
3475 | sections. The linker does that before | |
3476 | adjust_dynamic_symbol is called, and it is that | |
3477 | function which decides whether anything needs to go | |
3478 | into these sections. */ | |
3479 | ||
8423293d | 3480 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
3481 | continue; |
3482 | } | |
3483 | ||
c456f082 AM |
3484 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3485 | continue; | |
3486 | ||
70256ad8 AJ |
3487 | /* Allocate memory for the section contents. We use bfd_zalloc |
3488 | here in case unused entries are not reclaimed before the | |
3489 | section's contents are written out. This should not happen, | |
3490 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
3491 | of garbage. */ | |
eea6121a | 3492 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 3493 | if (s->contents == NULL) |
b34976b6 | 3494 | return FALSE; |
70256ad8 AJ |
3495 | } |
3496 | ||
e41b3a13 | 3497 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3498 | && htab->plt_eh_frame->contents != NULL) |
3499 | { | |
3500 | const struct elf_x86_64_backend_data *arch_data | |
f8222080 | 3501 | = get_elf_x86_64_arch_data (bed); |
9a2a56cc AM |
3502 | |
3503 | memcpy (htab->plt_eh_frame->contents, | |
3504 | arch_data->eh_frame_plt, htab->plt_eh_frame->size); | |
3505 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
3506 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
3507 | } | |
e41b3a13 | 3508 | |
c434dee6 | 3509 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
3510 | { |
3511 | /* Add some entries to the .dynamic section. We fill in the | |
351f65ca | 3512 | values later, in elf_x86_64_finish_dynamic_sections, but we |
70256ad8 | 3513 | must add the entries now so that we get the correct size for |
407443a3 | 3514 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 3515 | dynamic linker and used by the debugger. */ |
dc810e39 | 3516 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3517 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3518 | |
0e1862bb | 3519 | if (bfd_link_executable (info)) |
70256ad8 | 3520 | { |
dc810e39 | 3521 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3522 | return FALSE; |
70256ad8 AJ |
3523 | } |
3524 | ||
6de2ae4a | 3525 | if (htab->elf.splt->size != 0) |
70256ad8 | 3526 | { |
7c1e8d3e L |
3527 | /* DT_PLTGOT is used by prelink even if there is no PLT |
3528 | relocation. */ | |
3529 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
b34976b6 | 3530 | return FALSE; |
67a4f2b7 | 3531 | |
7c1e8d3e L |
3532 | if (htab->elf.srelplt->size != 0) |
3533 | { | |
3534 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
3535 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
3536 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
3537 | return FALSE; | |
3538 | } | |
3539 | ||
67a4f2b7 AO |
3540 | if (htab->tlsdesc_plt |
3541 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
3542 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
3543 | return FALSE; | |
70256ad8 AJ |
3544 | } |
3545 | ||
3546 | if (relocs) | |
3547 | { | |
dc810e39 AM |
3548 | if (!add_dynamic_entry (DT_RELA, 0) |
3549 | || !add_dynamic_entry (DT_RELASZ, 0) | |
351f65ca | 3550 | || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela)) |
b34976b6 | 3551 | return FALSE; |
70256ad8 | 3552 | |
c434dee6 AJ |
3553 | /* If any dynamic relocs apply to a read-only section, |
3554 | then we need a DT_TEXTREL entry. */ | |
3555 | if ((info->flags & DF_TEXTREL) == 0) | |
eed180f8 | 3556 | elf_link_hash_traverse (&htab->elf, |
351f65ca | 3557 | elf_x86_64_readonly_dynrelocs, |
eb4ff4d6 | 3558 | info); |
c434dee6 AJ |
3559 | |
3560 | if ((info->flags & DF_TEXTREL) != 0) | |
3561 | { | |
8efa2874 L |
3562 | if ((elf_tdata (output_bfd)->has_gnu_symbols |
3563 | & elf_gnu_symbol_ifunc) == elf_gnu_symbol_ifunc) | |
3564 | { | |
3565 | info->callbacks->einfo | |
3566 | (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n")); | |
3567 | bfd_set_error (bfd_error_bad_value); | |
3568 | return FALSE; | |
3569 | } | |
3570 | ||
c434dee6 | 3571 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 3572 | return FALSE; |
c434dee6 | 3573 | } |
70256ad8 AJ |
3574 | } |
3575 | } | |
dc810e39 | 3576 | #undef add_dynamic_entry |
70256ad8 | 3577 | |
b34976b6 | 3578 | return TRUE; |
70256ad8 AJ |
3579 | } |
3580 | ||
67a4f2b7 | 3581 | static bfd_boolean |
351f65ca L |
3582 | elf_x86_64_always_size_sections (bfd *output_bfd, |
3583 | struct bfd_link_info *info) | |
67a4f2b7 AO |
3584 | { |
3585 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3586 | ||
3587 | if (tls_sec) | |
3588 | { | |
3589 | struct elf_link_hash_entry *tlsbase; | |
3590 | ||
3591 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3592 | "_TLS_MODULE_BASE_", | |
3593 | FALSE, FALSE, FALSE); | |
3594 | ||
3595 | if (tlsbase && tlsbase->type == STT_TLS) | |
3596 | { | |
351f65ca | 3597 | struct elf_x86_64_link_hash_table *htab; |
67a4f2b7 AO |
3598 | struct bfd_link_hash_entry *bh = NULL; |
3599 | const struct elf_backend_data *bed | |
3600 | = get_elf_backend_data (output_bfd); | |
3601 | ||
351f65ca | 3602 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3603 | if (htab == NULL) |
3604 | return FALSE; | |
3605 | ||
67a4f2b7 AO |
3606 | if (!(_bfd_generic_link_add_one_symbol |
3607 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3608 | tls_sec, 0, NULL, FALSE, | |
3609 | bed->collect, &bh))) | |
3610 | return FALSE; | |
9f03412a | 3611 | |
4dfe6ac6 | 3612 | htab->tls_module_base = bh; |
9f03412a | 3613 | |
67a4f2b7 AO |
3614 | tlsbase = (struct elf_link_hash_entry *)bh; |
3615 | tlsbase->def_regular = 1; | |
3616 | tlsbase->other = STV_HIDDEN; | |
576fa883 | 3617 | tlsbase->root.linker_def = 1; |
67a4f2b7 AO |
3618 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
3619 | } | |
3620 | } | |
3621 | ||
3622 | return TRUE; | |
3623 | } | |
3624 | ||
9f03412a AO |
3625 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
3626 | executables. Rather than setting it to the beginning of the TLS | |
3627 | section, we have to set it to the end. This function may be called | |
3628 | multiple times, it is idempotent. */ | |
3629 | ||
3630 | static void | |
351f65ca | 3631 | elf_x86_64_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 3632 | { |
351f65ca | 3633 | struct elf_x86_64_link_hash_table *htab; |
9f03412a AO |
3634 | struct bfd_link_hash_entry *base; |
3635 | ||
0e1862bb | 3636 | if (!bfd_link_executable (info)) |
9f03412a AO |
3637 | return; |
3638 | ||
351f65ca | 3639 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3640 | if (htab == NULL) |
3641 | return; | |
9f03412a | 3642 | |
4dfe6ac6 NC |
3643 | base = htab->tls_module_base; |
3644 | if (base == NULL) | |
9f03412a AO |
3645 | return; |
3646 | ||
4dfe6ac6 | 3647 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
3648 | } |
3649 | ||
bffbf940 JJ |
3650 | /* Return the base VMA address which should be subtracted from real addresses |
3651 | when resolving @dtpoff relocation. | |
3652 | This is PT_TLS segment p_vaddr. */ | |
3653 | ||
3654 | static bfd_vma | |
351f65ca | 3655 | elf_x86_64_dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 3656 | { |
e1918d23 AM |
3657 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3658 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 3659 | return 0; |
e1918d23 | 3660 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
3661 | } |
3662 | ||
3663 | /* Return the relocation value for @tpoff relocation | |
3664 | if STT_TLS virtual address is ADDRESS. */ | |
3665 | ||
3666 | static bfd_vma | |
351f65ca | 3667 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 3668 | { |
e1918d23 | 3669 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3670 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3671 | bfd_vma static_tls_size; | |
bffbf940 JJ |
3672 | |
3673 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 3674 | if (htab->tls_sec == NULL) |
bffbf940 | 3675 | return 0; |
7dc98aea RO |
3676 | |
3677 | /* Consider special static TLS alignment requirements. */ | |
3678 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3679 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
3680 | } |
3681 | ||
90f487df L |
3682 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
3683 | branch? */ | |
3684 | ||
3685 | static bfd_boolean | |
3686 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
3687 | { | |
3688 | /* Opcode Instruction | |
3689 | 0xe8 call | |
3690 | 0xe9 jump | |
3691 | 0x0f 0x8x conditional jump */ | |
3692 | return ((offset > 0 | |
3693 | && (contents [offset - 1] == 0xe8 | |
3694 | || contents [offset - 1] == 0xe9)) | |
3695 | || (offset > 1 | |
3696 | && contents [offset - 2] == 0x0f | |
3697 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
3698 | } | |
3699 | ||
8d88c4ca NC |
3700 | /* Relocate an x86_64 ELF section. */ |
3701 | ||
b34976b6 | 3702 | static bfd_boolean |
351f65ca L |
3703 | elf_x86_64_relocate_section (bfd *output_bfd, |
3704 | struct bfd_link_info *info, | |
3705 | bfd *input_bfd, | |
3706 | asection *input_section, | |
3707 | bfd_byte *contents, | |
3708 | Elf_Internal_Rela *relocs, | |
3709 | Elf_Internal_Sym *local_syms, | |
3710 | asection **local_sections) | |
8d88c4ca | 3711 | { |
351f65ca | 3712 | struct elf_x86_64_link_hash_table *htab; |
8d88c4ca NC |
3713 | Elf_Internal_Shdr *symtab_hdr; |
3714 | struct elf_link_hash_entry **sym_hashes; | |
3715 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3716 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 3717 | Elf_Internal_Rela *rel; |
8d88c4ca | 3718 | Elf_Internal_Rela *relend; |
eed180f8 | 3719 | const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
8d88c4ca | 3720 | |
0ffa91dd NC |
3721 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
3722 | ||
351f65ca | 3723 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3724 | if (htab == NULL) |
3725 | return FALSE; | |
0ffa91dd | 3726 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
3727 | sym_hashes = elf_sym_hashes (input_bfd); |
3728 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
351f65ca | 3729 | local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 3730 | |
351f65ca | 3731 | elf_x86_64_set_tls_module_base (info); |
9f03412a | 3732 | |
c434dee6 | 3733 | rel = relocs; |
8d88c4ca | 3734 | relend = relocs + input_section->reloc_count; |
c434dee6 | 3735 | for (; rel < relend; rel++) |
8d88c4ca | 3736 | { |
bffbf940 | 3737 | unsigned int r_type; |
8d88c4ca NC |
3738 | reloc_howto_type *howto; |
3739 | unsigned long r_symndx; | |
3740 | struct elf_link_hash_entry *h; | |
0ff2b86e | 3741 | struct elf_x86_64_link_hash_entry *eh; |
8d88c4ca NC |
3742 | Elf_Internal_Sym *sym; |
3743 | asection *sec; | |
0ff2b86e | 3744 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 3745 | bfd_vma relocation; |
b34976b6 | 3746 | bfd_boolean unresolved_reloc; |
8d88c4ca | 3747 | bfd_reloc_status_type r; |
bffbf940 | 3748 | int tls_type; |
0ff2b86e | 3749 | asection *base_got, *resolved_plt; |
1788fc08 | 3750 | bfd_vma st_size; |
8d88c4ca | 3751 | |
351f65ca | 3752 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
3753 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
3754 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
3755 | continue; | |
8d88c4ca | 3756 | |
9911c0fc | 3757 | if (r_type >= (int) R_X86_64_standard) |
8da6118f | 3758 | { |
9911c0fc L |
3759 | (*_bfd_error_handler) |
3760 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), | |
3761 | input_bfd, input_section, r_type); | |
8da6118f | 3762 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 3763 | return FALSE; |
8da6118f | 3764 | } |
8d88c4ca | 3765 | |
d7921315 | 3766 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 3767 | || ABI_64_P (output_bfd)) |
d7921315 L |
3768 | howto = x86_64_elf_howto_table + r_type; |
3769 | else | |
3770 | howto = (x86_64_elf_howto_table | |
3771 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 3772 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
3773 | h = NULL; |
3774 | sym = NULL; | |
3775 | sec = NULL; | |
b34976b6 | 3776 | unresolved_reloc = FALSE; |
8d88c4ca | 3777 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
3778 | { |
3779 | sym = local_syms + r_symndx; | |
3780 | sec = local_sections[r_symndx]; | |
c434dee6 | 3781 | |
c25bc9fc L |
3782 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
3783 | &sec, rel); | |
1788fc08 | 3784 | st_size = sym->st_size; |
c25bc9fc L |
3785 | |
3786 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0e1862bb | 3787 | if (!bfd_link_relocatable (info) |
351f65ca | 3788 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 3789 | { |
351f65ca L |
3790 | h = elf_x86_64_get_local_sym_hash (htab, input_bfd, |
3791 | rel, FALSE); | |
c25bc9fc L |
3792 | if (h == NULL) |
3793 | abort (); | |
3794 | ||
eed180f8 | 3795 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
3796 | h->root.u.def.value = sym->st_value; |
3797 | h->root.u.def.section = sec; | |
3798 | } | |
8da6118f | 3799 | } |
8d88c4ca | 3800 | else |
8da6118f | 3801 | { |
c9736ba0 | 3802 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 3803 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
c434dee6 | 3804 | |
b2a8e766 AM |
3805 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3806 | r_symndx, symtab_hdr, sym_hashes, | |
3807 | h, sec, relocation, | |
62d887d4 | 3808 | unresolved_reloc, warned, ignored); |
1788fc08 | 3809 | st_size = h->size; |
8da6118f | 3810 | } |
ab96bf03 | 3811 | |
dbaa2011 | 3812 | if (sec != NULL && discarded_section (sec)) |
0672748a | 3813 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 3814 | rel, 1, relend, howto, 0, contents); |
ab96bf03 | 3815 | |
0e1862bb | 3816 | if (bfd_link_relocatable (info)) |
ab96bf03 AM |
3817 | continue; |
3818 | ||
1788fc08 | 3819 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 3820 | { |
1788fc08 L |
3821 | if (r_type == R_X86_64_64) |
3822 | { | |
3823 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
3824 | zero-extend it to 64bit if addend is zero. */ | |
3825 | r_type = R_X86_64_32; | |
3826 | memset (contents + rel->r_offset + 4, 0, 4); | |
3827 | } | |
3828 | else if (r_type == R_X86_64_SIZE64) | |
3829 | { | |
3830 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
3831 | zero-extend it to 64bit if addend is zero. */ | |
3832 | r_type = R_X86_64_SIZE32; | |
3833 | memset (contents + rel->r_offset + 4, 0, 4); | |
3834 | } | |
64d25c44 L |
3835 | } |
3836 | ||
0ff2b86e L |
3837 | eh = (struct elf_x86_64_link_hash_entry *) h; |
3838 | ||
cbe950e9 L |
3839 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3840 | it here if it is defined in a non-shared object. */ | |
3841 | if (h != NULL | |
3842 | && h->type == STT_GNU_IFUNC | |
3843 | && h->def_regular) | |
3844 | { | |
cbe950e9 | 3845 | bfd_vma plt_index; |
4c544807 | 3846 | const char *name; |
cbe950e9 | 3847 | |
97dc35c8 L |
3848 | if ((input_section->flags & SEC_ALLOC) == 0) |
3849 | { | |
3850 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
3851 | sections because such sections are not SEC_ALLOC and | |
3852 | thus ld.so will not process them. */ | |
3853 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 3854 | continue; |
97dc35c8 L |
3855 | abort (); |
3856 | } | |
3857 | else if (h->plt.offset == (bfd_vma) -1) | |
cbe950e9 L |
3858 | abort (); |
3859 | ||
3860 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
3861 | if (htab->elf.splt != NULL) |
3862 | { | |
3863 | if (htab->plt_bnd != NULL) | |
3864 | { | |
3865 | resolved_plt = htab->plt_bnd; | |
3866 | plt_offset = eh->plt_bnd.offset; | |
3867 | } | |
3868 | else | |
3869 | { | |
3870 | resolved_plt = htab->elf.splt; | |
3871 | plt_offset = h->plt.offset; | |
3872 | } | |
3873 | } | |
3874 | else | |
3875 | { | |
3876 | resolved_plt = htab->elf.iplt; | |
3877 | plt_offset = h->plt.offset; | |
3878 | } | |
3879 | ||
3880 | relocation = (resolved_plt->output_section->vma | |
3881 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
3882 | |
3883 | switch (r_type) | |
3884 | { | |
3885 | default: | |
4c544807 L |
3886 | if (h->root.root.string) |
3887 | name = h->root.root.string; | |
3888 | else | |
3889 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
3890 | NULL); | |
cbe950e9 L |
3891 | (*_bfd_error_handler) |
3892 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
3893 | "symbol `%s' isn't handled by %s"), input_bfd, | |
3894 | x86_64_elf_howto_table[r_type].name, | |
4c544807 | 3895 | name, __FUNCTION__); |
cbe950e9 L |
3896 | bfd_set_error (bfd_error_bad_value); |
3897 | return FALSE; | |
3898 | ||
3899 | case R_X86_64_32S: | |
0e1862bb | 3900 | if (bfd_link_pic (info)) |
cbe950e9 | 3901 | abort (); |
710ab287 L |
3902 | goto do_relocation; |
3903 | ||
248775ba L |
3904 | case R_X86_64_32: |
3905 | if (ABI_64_P (output_bfd)) | |
3906 | goto do_relocation; | |
17672001 | 3907 | /* FALLTHROUGH */ |
eed180f8 | 3908 | case R_X86_64_64: |
710ab287 L |
3909 | if (rel->r_addend != 0) |
3910 | { | |
4c544807 L |
3911 | if (h->root.root.string) |
3912 | name = h->root.root.string; | |
3913 | else | |
3914 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3915 | sym, NULL); | |
710ab287 L |
3916 | (*_bfd_error_handler) |
3917 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
3918 | "symbol `%s' has non-zero addend: %d"), | |
3919 | input_bfd, x86_64_elf_howto_table[r_type].name, | |
4c544807 | 3920 | name, rel->r_addend); |
710ab287 L |
3921 | bfd_set_error (bfd_error_bad_value); |
3922 | return FALSE; | |
3923 | } | |
3924 | ||
3925 | /* Generate dynamic relcoation only when there is a | |
c293fa49 | 3926 | non-GOT reference in a shared object. */ |
0e1862bb | 3927 | if (bfd_link_pic (info) && h->non_got_ref) |
710ab287 L |
3928 | { |
3929 | Elf_Internal_Rela outrel; | |
710ab287 L |
3930 | asection *sreloc; |
3931 | ||
c25bc9fc L |
3932 | /* Need a dynamic relocation to get the real function |
3933 | address. */ | |
710ab287 L |
3934 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
3935 | info, | |
3936 | input_section, | |
3937 | rel->r_offset); | |
3938 | if (outrel.r_offset == (bfd_vma) -1 | |
3939 | || outrel.r_offset == (bfd_vma) -2) | |
3940 | abort (); | |
3941 | ||
3942 | outrel.r_offset += (input_section->output_section->vma | |
3943 | + input_section->output_offset); | |
3944 | ||
3945 | if (h->dynindx == -1 | |
44c4ea11 | 3946 | || h->forced_local |
0e1862bb | 3947 | || bfd_link_executable (info)) |
710ab287 L |
3948 | { |
3949 | /* This symbol is resolved locally. */ | |
56b8aada L |
3950 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
3951 | outrel.r_addend = (h->root.u.def.value | |
3952 | + h->root.u.def.section->output_section->vma | |
3953 | + h->root.u.def.section->output_offset); | |
710ab287 L |
3954 | } |
3955 | else | |
3956 | { | |
351f65ca | 3957 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
3958 | outrel.r_addend = 0; |
3959 | } | |
3960 | ||
6de2ae4a | 3961 | sreloc = htab->elf.irelifunc; |
351f65ca | 3962 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
3963 | |
3964 | /* If this reloc is against an external symbol, we | |
3965 | do not want to fiddle with the addend. Otherwise, | |
3966 | we need to include the symbol value so that it | |
3967 | becomes an addend for the dynamic reloc. For an | |
3968 | internal symbol, we have updated addend. */ | |
56b8aada | 3969 | continue; |
710ab287 | 3970 | } |
17672001 | 3971 | /* FALLTHROUGH */ |
cbe950e9 | 3972 | case R_X86_64_PC32: |
c3320543 | 3973 | case R_X86_64_PC32_BND: |
cbe950e9 L |
3974 | case R_X86_64_PC64: |
3975 | case R_X86_64_PLT32: | |
c3320543 | 3976 | case R_X86_64_PLT32_BND: |
cbe950e9 L |
3977 | goto do_relocation; |
3978 | ||
3979 | case R_X86_64_GOTPCREL: | |
3980 | case R_X86_64_GOTPCREL64: | |
6de2ae4a | 3981 | base_got = htab->elf.sgot; |
cbe950e9 L |
3982 | off = h->got.offset; |
3983 | ||
7afd84dc | 3984 | if (base_got == NULL) |
cbe950e9 L |
3985 | abort (); |
3986 | ||
7afd84dc | 3987 | if (off == (bfd_vma) -1) |
cbe950e9 | 3988 | { |
7afd84dc L |
3989 | /* We can't use h->got.offset here to save state, or |
3990 | even just remember the offset, as finish_dynamic_symbol | |
3991 | would use that as offset into .got. */ | |
cbe950e9 | 3992 | |
6de2ae4a | 3993 | if (htab->elf.splt != NULL) |
7afd84dc | 3994 | { |
eed180f8 | 3995 | plt_index = h->plt.offset / plt_entry_size - 1; |
7afd84dc | 3996 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 3997 | base_got = htab->elf.sgotplt; |
7afd84dc | 3998 | } |
cbe950e9 L |
3999 | else |
4000 | { | |
eed180f8 | 4001 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 4002 | off = plt_index * GOT_ENTRY_SIZE; |
6de2ae4a | 4003 | base_got = htab->elf.igotplt; |
7afd84dc L |
4004 | } |
4005 | ||
4006 | if (h->dynindx == -1 | |
4007 | || h->forced_local | |
4008 | || info->symbolic) | |
4009 | { | |
eed180f8 | 4010 | /* This references the local defitionion. We must |
7afd84dc | 4011 | initialize this entry in the global offset table. |
eed180f8 | 4012 | Since the offset must always be a multiple of 8, |
7afd84dc L |
4013 | we use the least significant bit to record |
4014 | whether we have initialized it already. | |
4015 | ||
4016 | When doing a dynamic link, we create a .rela.got | |
4017 | relocation entry to initialize the value. This | |
4018 | is done in the finish_dynamic_symbol routine. */ | |
4019 | if ((off & 1) != 0) | |
4020 | off &= ~1; | |
4021 | else | |
4022 | { | |
4023 | bfd_put_64 (output_bfd, relocation, | |
4024 | base_got->contents + off); | |
4025 | /* Note that this is harmless for the GOTPLT64 | |
4026 | case, as -1 | 1 still is -1. */ | |
4027 | h->got.offset |= 1; | |
4028 | } | |
cbe950e9 L |
4029 | } |
4030 | } | |
4031 | ||
4032 | relocation = (base_got->output_section->vma | |
4033 | + base_got->output_offset + off); | |
4034 | ||
cbe950e9 L |
4035 | goto do_relocation; |
4036 | } | |
4037 | } | |
4038 | ||
70256ad8 AJ |
4039 | /* When generating a shared object, the relocations handled here are |
4040 | copied into the output file to be resolved at run time. */ | |
4041 | switch (r_type) | |
4042 | { | |
4043 | case R_X86_64_GOT32: | |
7b81dfbb | 4044 | case R_X86_64_GOT64: |
70256ad8 AJ |
4045 | /* Relocation is to the entry for this symbol in the global |
4046 | offset table. */ | |
70256ad8 | 4047 | case R_X86_64_GOTPCREL: |
7b81dfbb AJ |
4048 | case R_X86_64_GOTPCREL64: |
4049 | /* Use global offset table entry as symbol value. */ | |
4050 | case R_X86_64_GOTPLT64: | |
553d1284 | 4051 | /* This is obsolete and treated the the same as GOT64. */ |
6de2ae4a | 4052 | base_got = htab->elf.sgot; |
7b81dfbb | 4053 | |
6de2ae4a | 4054 | if (htab->elf.sgot == NULL) |
c434dee6 | 4055 | abort (); |
053579d7 | 4056 | |
51e0a107 | 4057 | if (h != NULL) |
70256ad8 | 4058 | { |
b34976b6 | 4059 | bfd_boolean dyn; |
c434dee6 AJ |
4060 | |
4061 | off = h->got.offset; | |
7b81dfbb | 4062 | if (h->needs_plt |
eed180f8 | 4063 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
4064 | && off == (bfd_vma)-1) |
4065 | { | |
4066 | /* We can't use h->got.offset here to save | |
4067 | state, or even just remember the offset, as | |
4068 | finish_dynamic_symbol would use that as offset into | |
4069 | .got. */ | |
eed180f8 | 4070 | bfd_vma plt_index = h->plt.offset / plt_entry_size - 1; |
7b81dfbb | 4071 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 4072 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
4073 | } |
4074 | ||
c434dee6 | 4075 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 4076 | |
0e1862bb L |
4077 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
4078 | || (bfd_link_pic (info) | |
27482721 | 4079 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
4080 | || (ELF_ST_VISIBILITY (h->other) |
4081 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
4082 | { |
4083 | /* This is actually a static link, or it is a -Bsymbolic | |
4084 | link and the symbol is defined locally, or the symbol | |
407443a3 | 4085 | was forced to be local because of a version file. We |
51e0a107 JH |
4086 | must initialize this entry in the global offset table. |
4087 | Since the offset must always be a multiple of 8, we | |
4088 | use the least significant bit to record whether we | |
4089 | have initialized it already. | |
4090 | ||
4091 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
4092 | relocation entry to initialize the value. This is |
4093 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
4094 | if ((off & 1) != 0) |
4095 | off &= ~1; | |
4096 | else | |
4097 | { | |
4098 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
4099 | base_got->contents + off); |
4100 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 4101 | as -1 | 1 still is -1. */ |
51e0a107 JH |
4102 | h->got.offset |= 1; |
4103 | } | |
4104 | } | |
053579d7 | 4105 | else |
b34976b6 | 4106 | unresolved_reloc = FALSE; |
70256ad8 | 4107 | } |
51e0a107 JH |
4108 | else |
4109 | { | |
c434dee6 AJ |
4110 | if (local_got_offsets == NULL) |
4111 | abort (); | |
51e0a107 JH |
4112 | |
4113 | off = local_got_offsets[r_symndx]; | |
4114 | ||
4115 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
4116 | the least significant bit to record whether we have |
4117 | already generated the necessary reloc. */ | |
51e0a107 JH |
4118 | if ((off & 1) != 0) |
4119 | off &= ~1; | |
4120 | else | |
4121 | { | |
c434dee6 | 4122 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 4123 | base_got->contents + off); |
51e0a107 | 4124 | |
0e1862bb | 4125 | if (bfd_link_pic (info)) |
51e0a107 | 4126 | { |
947216bf | 4127 | asection *s; |
51e0a107 | 4128 | Elf_Internal_Rela outrel; |
70256ad8 | 4129 | |
51e0a107 JH |
4130 | /* We need to generate a R_X86_64_RELATIVE reloc |
4131 | for the dynamic linker. */ | |
6de2ae4a | 4132 | s = htab->elf.srelgot; |
947216bf | 4133 | if (s == NULL) |
c434dee6 | 4134 | abort (); |
51e0a107 | 4135 | |
7b81dfbb AJ |
4136 | outrel.r_offset = (base_got->output_section->vma |
4137 | + base_got->output_offset | |
51e0a107 | 4138 | + off); |
351f65ca | 4139 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
51e0a107 | 4140 | outrel.r_addend = relocation; |
351f65ca | 4141 | elf_append_rela (output_bfd, s, &outrel); |
51e0a107 JH |
4142 | } |
4143 | ||
4144 | local_got_offsets[r_symndx] |= 1; | |
4145 | } | |
51e0a107 | 4146 | } |
6a2bda3f | 4147 | |
c434dee6 AJ |
4148 | if (off >= (bfd_vma) -2) |
4149 | abort (); | |
4150 | ||
7b81dfbb AJ |
4151 | relocation = base_got->output_section->vma |
4152 | + base_got->output_offset + off; | |
4153 | if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
4154 | relocation -= htab->elf.sgotplt->output_section->vma |
4155 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 4156 | |
70256ad8 AJ |
4157 | break; |
4158 | ||
d6ab8113 JB |
4159 | case R_X86_64_GOTOFF64: |
4160 | /* Relocation is relative to the start of the global offset | |
4161 | table. */ | |
4162 | ||
3d949995 L |
4163 | /* Check to make sure it isn't a protected function or data |
4164 | symbol for shared library since it may not be local when | |
e3c0e327 L |
4165 | used as function address or with copy relocation. We also |
4166 | need to make sure that a symbol is referenced locally. */ | |
0e1862bb | 4167 | if (bfd_link_pic (info) && h) |
d6ab8113 | 4168 | { |
e3c0e327 L |
4169 | if (!h->def_regular) |
4170 | { | |
4171 | const char *v; | |
4172 | ||
4173 | switch (ELF_ST_VISIBILITY (h->other)) | |
4174 | { | |
4175 | case STV_HIDDEN: | |
4176 | v = _("hidden symbol"); | |
4177 | break; | |
4178 | case STV_INTERNAL: | |
4179 | v = _("internal symbol"); | |
4180 | break; | |
4181 | case STV_PROTECTED: | |
4182 | v = _("protected symbol"); | |
4183 | break; | |
4184 | default: | |
4185 | v = _("symbol"); | |
4186 | break; | |
4187 | } | |
4188 | ||
4189 | (*_bfd_error_handler) | |
4190 | (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s `%s' can not be used when making a shared object"), | |
4191 | input_bfd, v, h->root.root.string); | |
4192 | bfd_set_error (bfd_error_bad_value); | |
4193 | return FALSE; | |
4194 | } | |
0e1862bb | 4195 | else if (!bfd_link_executable (info) |
e3c0e327 L |
4196 | && !SYMBOL_REFERENCES_LOCAL (info, h) |
4197 | && (h->type == STT_FUNC | |
4198 | || h->type == STT_OBJECT) | |
4199 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
4200 | { | |
4201 | (*_bfd_error_handler) | |
4202 | (_("%B: relocation R_X86_64_GOTOFF64 against protected %s `%s' can not be used when making a shared object"), | |
4203 | input_bfd, | |
4204 | h->type == STT_FUNC ? "function" : "data", | |
4205 | h->root.root.string); | |
4206 | bfd_set_error (bfd_error_bad_value); | |
d6ab8113 | 4207 | return FALSE; |
e3c0e327 | 4208 | } |
d6ab8113 JB |
4209 | } |
4210 | ||
4211 | /* Note that sgot is not involved in this | |
4212 | calculation. We always want the start of .got.plt. If we | |
4213 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
4214 | permitted by the ABI, we might have to change this | |
4215 | calculation. */ | |
6de2ae4a L |
4216 | relocation -= htab->elf.sgotplt->output_section->vma |
4217 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4218 | break; |
4219 | ||
4220 | case R_X86_64_GOTPC32: | |
7b81dfbb | 4221 | case R_X86_64_GOTPC64: |
d6ab8113 | 4222 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
4223 | relocation = htab->elf.sgotplt->output_section->vma |
4224 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
4225 | unresolved_reloc = FALSE; |
4226 | break; | |
7b81dfbb AJ |
4227 | |
4228 | case R_X86_64_PLTOFF64: | |
4229 | /* Relocation is PLT entry relative to GOT. For local | |
4230 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 4231 | if (h != NULL |
7b81dfbb AJ |
4232 | /* See PLT32 handling. */ |
4233 | && h->plt.offset != (bfd_vma) -1 | |
6de2ae4a | 4234 | && htab->elf.splt != NULL) |
7b81dfbb | 4235 | { |
0ff2b86e L |
4236 | if (htab->plt_bnd != NULL) |
4237 | { | |
4238 | resolved_plt = htab->plt_bnd; | |
4239 | plt_offset = eh->plt_bnd.offset; | |
4240 | } | |
4241 | else | |
4242 | { | |
4243 | resolved_plt = htab->elf.splt; | |
4244 | plt_offset = h->plt.offset; | |
4245 | } | |
4246 | ||
4247 | relocation = (resolved_plt->output_section->vma | |
4248 | + resolved_plt->output_offset | |
4249 | + plt_offset); | |
7b81dfbb AJ |
4250 | unresolved_reloc = FALSE; |
4251 | } | |
4252 | ||
6de2ae4a L |
4253 | relocation -= htab->elf.sgotplt->output_section->vma |
4254 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 4255 | break; |
d6ab8113 | 4256 | |
70256ad8 | 4257 | case R_X86_64_PLT32: |
c3320543 | 4258 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
4259 | /* Relocation is to the entry for this symbol in the |
4260 | procedure linkage table. */ | |
4261 | ||
4262 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 4263 | without using the procedure linkage table. */ |
70256ad8 AJ |
4264 | if (h == NULL) |
4265 | break; | |
4266 | ||
dd7e64d4 L |
4267 | if ((h->plt.offset == (bfd_vma) -1 |
4268 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 4269 | || htab->elf.splt == NULL) |
70256ad8 AJ |
4270 | { |
4271 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
4272 | happens when statically linking PIC code, or when |
4273 | using -Bsymbolic. */ | |
70256ad8 AJ |
4274 | break; |
4275 | } | |
4276 | ||
dd7e64d4 | 4277 | if (h->plt.offset != (bfd_vma) -1) |
0ff2b86e | 4278 | { |
dd7e64d4 L |
4279 | if (htab->plt_bnd != NULL) |
4280 | { | |
4281 | resolved_plt = htab->plt_bnd; | |
4282 | plt_offset = eh->plt_bnd.offset; | |
4283 | } | |
4284 | else | |
4285 | { | |
4286 | resolved_plt = htab->elf.splt; | |
4287 | plt_offset = h->plt.offset; | |
4288 | } | |
0ff2b86e L |
4289 | } |
4290 | else | |
4291 | { | |
dd7e64d4 L |
4292 | /* Use the GOT PLT. */ |
4293 | resolved_plt = htab->plt_got; | |
4294 | plt_offset = eh->plt_got.offset; | |
0ff2b86e L |
4295 | } |
4296 | ||
4297 | relocation = (resolved_plt->output_section->vma | |
4298 | + resolved_plt->output_offset | |
4299 | + plt_offset); | |
b34976b6 | 4300 | unresolved_reloc = FALSE; |
70256ad8 AJ |
4301 | break; |
4302 | ||
1788fc08 L |
4303 | case R_X86_64_SIZE32: |
4304 | case R_X86_64_SIZE64: | |
1788fc08 L |
4305 | /* Set to symbol size. */ |
4306 | relocation = st_size; | |
4307 | goto direct; | |
4308 | ||
fd8ab9e5 AJ |
4309 | case R_X86_64_PC8: |
4310 | case R_X86_64_PC16: | |
4311 | case R_X86_64_PC32: | |
c3320543 | 4312 | case R_X86_64_PC32_BND: |
6333bc0d L |
4313 | /* Don't complain about -fPIC if the symbol is undefined when |
4314 | building executable. */ | |
0e1862bb | 4315 | if (bfd_link_pic (info) |
ba3bee0b | 4316 | && (input_section->flags & SEC_ALLOC) != 0 |
90f487df | 4317 | && (input_section->flags & SEC_READONLY) != 0 |
6333bc0d | 4318 | && h != NULL |
0e1862bb | 4319 | && !(bfd_link_executable (info) |
6333bc0d | 4320 | && h->root.type == bfd_link_hash_undefined)) |
6610a52d | 4321 | { |
41bed6dd L |
4322 | bfd_boolean fail = FALSE; |
4323 | bfd_boolean branch | |
c3320543 L |
4324 | = ((r_type == R_X86_64_PC32 |
4325 | || r_type == R_X86_64_PC32_BND) | |
41bed6dd L |
4326 | && is_32bit_relative_branch (contents, rel->r_offset)); |
4327 | ||
4328 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
4329 | { | |
4330 | /* Symbol is referenced locally. Make sure it is | |
4331 | defined locally or for a branch. */ | |
4332 | fail = !h->def_regular && !branch; | |
4333 | } | |
0e1862bb | 4334 | else if (!(bfd_link_executable (info) |
bc696fd5 | 4335 | && (h->needs_copy || eh->needs_copy))) |
41bed6dd | 4336 | { |
9a926d55 L |
4337 | /* Symbol doesn't need copy reloc and isn't referenced |
4338 | locally. We only allow branch to symbol with | |
4339 | non-default visibility. */ | |
41bed6dd L |
4340 | fail = (!branch |
4341 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
4342 | } | |
4343 | ||
4344 | if (fail) | |
4345 | { | |
4346 | const char *fmt; | |
4347 | const char *v; | |
4348 | const char *pic = ""; | |
4349 | ||
4350 | switch (ELF_ST_VISIBILITY (h->other)) | |
4351 | { | |
4352 | case STV_HIDDEN: | |
4353 | v = _("hidden symbol"); | |
4354 | break; | |
4355 | case STV_INTERNAL: | |
4356 | v = _("internal symbol"); | |
4357 | break; | |
4358 | case STV_PROTECTED: | |
4359 | v = _("protected symbol"); | |
4360 | break; | |
4361 | default: | |
4362 | v = _("symbol"); | |
4363 | pic = _("; recompile with -fPIC"); | |
4364 | break; | |
4365 | } | |
4366 | ||
4367 | if (h->def_regular) | |
4368 | fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s"); | |
4369 | else | |
4370 | fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s"); | |
4371 | ||
4372 | (*_bfd_error_handler) (fmt, input_bfd, | |
4373 | x86_64_elf_howto_table[r_type].name, | |
4374 | v, h->root.root.string, pic); | |
4375 | bfd_set_error (bfd_error_bad_value); | |
4376 | return FALSE; | |
4377 | } | |
6610a52d L |
4378 | } |
4379 | /* Fall through. */ | |
4380 | ||
70256ad8 AJ |
4381 | case R_X86_64_8: |
4382 | case R_X86_64_16: | |
4383 | case R_X86_64_32: | |
d6ab8113 | 4384 | case R_X86_64_PC64: |
6b3db546 | 4385 | case R_X86_64_64: |
80643fbc | 4386 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 4387 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 4388 | |
1788fc08 | 4389 | direct: |
b1e24c02 | 4390 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
4391 | break; |
4392 | ||
9a926d55 | 4393 | /* Don't copy a pc-relative relocation into the output file |
6333bc0d | 4394 | if the symbol needs copy reloc or the symbol is undefined |
04ebc307 L |
4395 | when building executable. Copy dynamic function pointer |
4396 | relocations. */ | |
0e1862bb L |
4397 | if ((bfd_link_pic (info) |
4398 | && !(bfd_link_executable (info) | |
fd9edc90 | 4399 | && h != NULL |
6333bc0d L |
4400 | && (h->needs_copy |
4401 | || eh->needs_copy | |
4402 | || h->root.type == bfd_link_hash_undefined) | |
9a926d55 | 4403 | && IS_X86_64_PCREL_TYPE (r_type)) |
4bc6e03a AJ |
4404 | && (h == NULL |
4405 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
4406 | || h->root.type != bfd_link_hash_undefweak) | |
1788fc08 L |
4407 | && ((! IS_X86_64_PCREL_TYPE (r_type) |
4408 | && r_type != R_X86_64_SIZE32 | |
4409 | && r_type != R_X86_64_SIZE64) | |
d8045f23 | 4410 | || ! SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c | 4411 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 4412 | && !bfd_link_pic (info) |
c434dee6 AJ |
4413 | && h != NULL |
4414 | && h->dynindx != -1 | |
04ebc307 | 4415 | && (!h->non_got_ref || eh->func_pointer_refcount > 0) |
f5385ebf AM |
4416 | && ((h->def_dynamic |
4417 | && !h->def_regular) | |
c434dee6 | 4418 | || h->root.type == bfd_link_hash_undefweak |
0f88be7a | 4419 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
4420 | { |
4421 | Elf_Internal_Rela outrel; | |
b34976b6 | 4422 | bfd_boolean skip, relocate; |
c434dee6 | 4423 | asection *sreloc; |
70256ad8 AJ |
4424 | |
4425 | /* When generating a shared object, these relocations | |
4426 | are copied into the output file to be resolved at run | |
407443a3 | 4427 | time. */ |
b34976b6 AM |
4428 | skip = FALSE; |
4429 | relocate = FALSE; | |
70256ad8 | 4430 | |
c629eae0 JJ |
4431 | outrel.r_offset = |
4432 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 4433 | rel->r_offset); |
c629eae0 | 4434 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 4435 | skip = TRUE; |
0fb19cbc | 4436 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 4437 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
4438 | |
4439 | outrel.r_offset += (input_section->output_section->vma | |
4440 | + input_section->output_offset); | |
4441 | ||
4442 | if (skip) | |
0bb2d96a | 4443 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 4444 | |
fd8ab9e5 AJ |
4445 | /* h->dynindx may be -1 if this symbol was marked to |
4446 | become local. */ | |
4447 | else if (h != NULL | |
c434dee6 | 4448 | && h->dynindx != -1 |
d8045f23 | 4449 | && (IS_X86_64_PCREL_TYPE (r_type) |
0e1862bb | 4450 | || ! bfd_link_pic (info) |
d8045f23 NC |
4451 | || ! SYMBOLIC_BIND (info, h) |
4452 | || ! h->def_regular)) | |
70256ad8 | 4453 | { |
351f65ca | 4454 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 4455 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
4456 | } |
4457 | else | |
4458 | { | |
c434dee6 | 4459 | /* This symbol is local, or marked to become local. */ |
248775ba | 4460 | if (r_type == htab->pointer_r_type) |
607c0e09 | 4461 | { |
b34976b6 | 4462 | relocate = TRUE; |
351f65ca | 4463 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
4464 | outrel.r_addend = relocation + rel->r_addend; |
4465 | } | |
64d25c44 L |
4466 | else if (r_type == R_X86_64_64 |
4467 | && !ABI_64_P (output_bfd)) | |
4468 | { | |
4469 | relocate = TRUE; | |
4470 | outrel.r_info = htab->r_info (0, | |
4471 | R_X86_64_RELATIVE64); | |
4472 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
4473 | /* Check addend overflow. */ |
4474 | if ((outrel.r_addend & 0x80000000) | |
4475 | != (rel->r_addend & 0x80000000)) | |
4476 | { | |
4477 | const char *name; | |
268a8d3a | 4478 | int addend = rel->r_addend; |
8cf0d2dd L |
4479 | if (h && h->root.root.string) |
4480 | name = h->root.root.string; | |
4481 | else | |
4482 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
4483 | sym, NULL); | |
6f2c9068 L |
4484 | if (addend < 0) |
4485 | (*_bfd_error_handler) | |
268a8d3a | 4486 | (_("%B: addend -0x%x in relocation %s against " |
6f2c9068 L |
4487 | "symbol `%s' at 0x%lx in section `%A' is " |
4488 | "out of range"), | |
4489 | input_bfd, input_section, addend, | |
4490 | x86_64_elf_howto_table[r_type].name, | |
4491 | name, (unsigned long) rel->r_offset); | |
4492 | else | |
4493 | (*_bfd_error_handler) | |
268a8d3a | 4494 | (_("%B: addend 0x%x in relocation %s against " |
6f2c9068 L |
4495 | "symbol `%s' at 0x%lx in section `%A' is " |
4496 | "out of range"), | |
4497 | input_bfd, input_section, addend, | |
4498 | x86_64_elf_howto_table[r_type].name, | |
4499 | name, (unsigned long) rel->r_offset); | |
8cf0d2dd L |
4500 | bfd_set_error (bfd_error_bad_value); |
4501 | return FALSE; | |
4502 | } | |
64d25c44 | 4503 | } |
607c0e09 AS |
4504 | else |
4505 | { | |
4506 | long sindx; | |
4507 | ||
8517fae7 | 4508 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
4509 | sindx = 0; |
4510 | else if (sec == NULL || sec->owner == NULL) | |
4511 | { | |
4512 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 4513 | return FALSE; |
607c0e09 AS |
4514 | } |
4515 | else | |
4516 | { | |
4517 | asection *osec; | |
4518 | ||
74541ad4 AM |
4519 | /* We are turning this relocation into one |
4520 | against a section symbol. It would be | |
4521 | proper to subtract the symbol's value, | |
4522 | osec->vma, from the emitted reloc addend, | |
4523 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
4524 | osec = sec->output_section; |
4525 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
4526 | if (sindx == 0) |
4527 | { | |
4528 | asection *oi = htab->elf.text_index_section; | |
4529 | sindx = elf_section_data (oi)->dynindx; | |
4530 | } | |
4531 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
4532 | } |
4533 | ||
351f65ca | 4534 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
4535 | outrel.r_addend = relocation + rel->r_addend; |
4536 | } | |
70256ad8 AJ |
4537 | } |
4538 | ||
cbe950e9 | 4539 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 4540 | |
62d78908 L |
4541 | if (sreloc == NULL || sreloc->contents == NULL) |
4542 | { | |
4543 | r = bfd_reloc_notsupported; | |
4544 | goto check_relocation_error; | |
4545 | } | |
c434dee6 | 4546 | |
351f65ca | 4547 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
4548 | |
4549 | /* If this reloc is against an external symbol, we do | |
4550 | not want to fiddle with the addend. Otherwise, we | |
4551 | need to include the symbol value so that it becomes | |
4552 | an addend for the dynamic reloc. */ | |
0f88be7a | 4553 | if (! relocate) |
70256ad8 AJ |
4554 | continue; |
4555 | } | |
4556 | ||
4557 | break; | |
4558 | ||
bffbf940 | 4559 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
4560 | case R_X86_64_GOTPC32_TLSDESC: |
4561 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 4562 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
4563 | tls_type = GOT_UNKNOWN; |
4564 | if (h == NULL && local_got_offsets) | |
351f65ca | 4565 | tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 4566 | else if (h != NULL) |
351f65ca | 4567 | tls_type = elf_x86_64_hash_entry (h)->tls_type; |
142411ca | 4568 | |
351f65ca L |
4569 | if (! elf_x86_64_tls_transition (info, input_bfd, |
4570 | input_section, contents, | |
4571 | symtab_hdr, sym_hashes, | |
4572 | &r_type, tls_type, rel, | |
4573 | relend, h, r_symndx)) | |
534a31f6 | 4574 | return FALSE; |
bffbf940 JJ |
4575 | |
4576 | if (r_type == R_X86_64_TPOFF32) | |
4577 | { | |
142411ca L |
4578 | bfd_vma roff = rel->r_offset; |
4579 | ||
bffbf940 | 4580 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 4581 | |
351f65ca | 4582 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 4583 | { |
52bc799a | 4584 | /* GD->LE transition. For 64bit, change |
abcf1d52 | 4585 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
a3fadc9a | 4586 | .word 0x6666; rex64; call __tls_get_addr |
52bc799a | 4587 | into: |
bffbf940 | 4588 | movq %fs:0, %rax |
52bc799a L |
4589 | leaq foo@tpoff(%rax), %rax |
4590 | For 32bit, change | |
4591 | leaq foo@tlsgd(%rip), %rdi | |
4592 | .word 0x6666; rex64; call __tls_get_addr | |
4593 | into: | |
4594 | movl %fs:0, %eax | |
5c98a14e JJ |
4595 | leaq foo@tpoff(%rax), %rax |
4596 | For largepic, change: | |
4597 | leaq foo@tlsgd(%rip), %rdi | |
4598 | movabsq $__tls_get_addr@pltoff, %rax | |
4599 | addq %rbx, %rax | |
4600 | call *%rax | |
4601 | into: | |
4602 | movq %fs:0, %rax | |
4603 | leaq foo@tpoff(%rax), %rax | |
4604 | nopw 0x0(%rax,%rax,1) */ | |
4605 | int largepic = 0; | |
4606 | if (ABI_64_P (output_bfd) | |
4607 | && contents[roff + 5] == (bfd_byte) '\xb8') | |
4608 | { | |
4609 | memcpy (contents + roff - 3, | |
4610 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
4611 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
4612 | largepic = 1; | |
4613 | } | |
4614 | else if (ABI_64_P (output_bfd)) | |
52bc799a L |
4615 | memcpy (contents + roff - 4, |
4616 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
4617 | 16); | |
4618 | else | |
4619 | memcpy (contents + roff - 3, | |
4620 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
4621 | 15); | |
eb4ff4d6 | 4622 | bfd_put_32 (output_bfd, |
351f65ca | 4623 | elf_x86_64_tpoff (info, relocation), |
5c98a14e JJ |
4624 | contents + roff + 8 + largepic); |
4625 | /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
bffbf940 JJ |
4626 | rel++; |
4627 | continue; | |
4628 | } | |
351f65ca | 4629 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
4630 | { |
4631 | /* GDesc -> LE transition. | |
4632 | It's originally something like: | |
4633 | leaq x@tlsdesc(%rip), %rax | |
4634 | ||
4635 | Change it to: | |
c9736ba0 | 4636 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 4637 | |
c9736ba0 | 4638 | unsigned int val, type; |
67a4f2b7 | 4639 | |
67a4f2b7 | 4640 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 4641 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
4642 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
4643 | contents + roff - 3); | |
4644 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
4645 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4646 | contents + roff - 1); | |
eb4ff4d6 | 4647 | bfd_put_32 (output_bfd, |
351f65ca | 4648 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
4649 | contents + roff); |
4650 | continue; | |
4651 | } | |
351f65ca | 4652 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
4653 | { |
4654 | /* GDesc -> LE transition. | |
4655 | It's originally: | |
4656 | call *(%rax) | |
4657 | Turn it into: | |
142411ca | 4658 | xchg %ax,%ax. */ |
10efb593 | 4659 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
4660 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4661 | continue; | |
4662 | } | |
351f65ca | 4663 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 4664 | { |
bffbf940 | 4665 | /* IE->LE transition: |
cf61b747 | 4666 | For 64bit, originally it can be one of: |
bffbf940 JJ |
4667 | movq foo@gottpoff(%rip), %reg |
4668 | addq foo@gottpoff(%rip), %reg | |
4669 | We change it into: | |
4670 | movq $foo, %reg | |
4671 | leaq foo(%reg), %reg | |
cf61b747 L |
4672 | addq $foo, %reg. |
4673 | For 32bit, originally it can be one of: | |
4674 | movq foo@gottpoff(%rip), %reg | |
4675 | addl foo@gottpoff(%rip), %reg | |
4676 | We change it into: | |
4677 | movq $foo, %reg | |
4678 | leal foo(%reg), %reg | |
4679 | addl $foo, %reg. */ | |
142411ca L |
4680 | |
4681 | unsigned int val, type, reg; | |
4682 | ||
cf61b747 L |
4683 | if (roff >= 3) |
4684 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
4685 | else | |
4686 | val = 0; | |
142411ca L |
4687 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
4688 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 4689 | reg >>= 3; |
bffbf940 JJ |
4690 | if (type == 0x8b) |
4691 | { | |
4692 | /* movq */ | |
4693 | if (val == 0x4c) | |
4694 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 4695 | contents + roff - 3); |
4a4c5f25 L |
4696 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4697 | bfd_put_8 (output_bfd, 0x41, | |
4698 | contents + roff - 3); | |
bffbf940 | 4699 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 4700 | contents + roff - 2); |
bffbf940 | 4701 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 4702 | contents + roff - 1); |
bffbf940 JJ |
4703 | } |
4704 | else if (reg == 4) | |
4705 | { | |
cf61b747 L |
4706 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
4707 | is special */ | |
bffbf940 JJ |
4708 | if (val == 0x4c) |
4709 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 4710 | contents + roff - 3); |
4a4c5f25 L |
4711 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4712 | bfd_put_8 (output_bfd, 0x41, | |
4713 | contents + roff - 3); | |
bffbf940 | 4714 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 4715 | contents + roff - 2); |
bffbf940 | 4716 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 4717 | contents + roff - 1); |
bffbf940 JJ |
4718 | } |
4719 | else | |
4720 | { | |
cf61b747 | 4721 | /* addq/addl -> leaq/leal */ |
bffbf940 JJ |
4722 | if (val == 0x4c) |
4723 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 4724 | contents + roff - 3); |
4a4c5f25 L |
4725 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4726 | bfd_put_8 (output_bfd, 0x45, | |
4727 | contents + roff - 3); | |
bffbf940 | 4728 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 4729 | contents + roff - 2); |
bffbf940 | 4730 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 4731 | contents + roff - 1); |
bffbf940 | 4732 | } |
eb4ff4d6 | 4733 | bfd_put_32 (output_bfd, |
351f65ca | 4734 | elf_x86_64_tpoff (info, relocation), |
142411ca | 4735 | contents + roff); |
bffbf940 JJ |
4736 | continue; |
4737 | } | |
142411ca L |
4738 | else |
4739 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
4740 | } |
4741 | ||
6de2ae4a | 4742 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
4743 | abort (); |
4744 | ||
4745 | if (h != NULL) | |
67a4f2b7 AO |
4746 | { |
4747 | off = h->got.offset; | |
351f65ca | 4748 | offplt = elf_x86_64_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 4749 | } |
bffbf940 JJ |
4750 | else |
4751 | { | |
4752 | if (local_got_offsets == NULL) | |
4753 | abort (); | |
4754 | ||
4755 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 4756 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
4757 | } |
4758 | ||
4759 | if ((off & 1) != 0) | |
4760 | off &= ~1; | |
26e41594 | 4761 | else |
bffbf940 JJ |
4762 | { |
4763 | Elf_Internal_Rela outrel; | |
bffbf940 | 4764 | int dr_type, indx; |
67a4f2b7 | 4765 | asection *sreloc; |
bffbf940 | 4766 | |
6de2ae4a | 4767 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
4768 | abort (); |
4769 | ||
67a4f2b7 AO |
4770 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4771 | ||
4772 | if (GOT_TLS_GDESC_P (tls_type)) | |
4773 | { | |
351f65ca | 4774 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 4775 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
4776 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
4777 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4778 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4779 | + offplt |
4780 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4781 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4782 | if (indx == 0) |
351f65ca | 4783 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
67a4f2b7 AO |
4784 | else |
4785 | outrel.r_addend = 0; | |
351f65ca | 4786 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
4787 | } |
4788 | ||
6de2ae4a | 4789 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4790 | |
6de2ae4a L |
4791 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4792 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 4793 | |
67a4f2b7 | 4794 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 4795 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
4796 | else if (GOT_TLS_GDESC_P (tls_type)) |
4797 | goto dr_done; | |
bffbf940 JJ |
4798 | else |
4799 | dr_type = R_X86_64_TPOFF64; | |
4800 | ||
6de2ae4a | 4801 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 4802 | outrel.r_addend = 0; |
67a4f2b7 AO |
4803 | if ((dr_type == R_X86_64_TPOFF64 |
4804 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
351f65ca L |
4805 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
4806 | outrel.r_info = htab->r_info (indx, dr_type); | |
bffbf940 | 4807 | |
351f65ca | 4808 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 4809 | |
67a4f2b7 | 4810 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
4811 | { |
4812 | if (indx == 0) | |
4813 | { | |
d40d037c | 4814 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 4815 | bfd_put_64 (output_bfd, |
351f65ca | 4816 | relocation - elf_x86_64_dtpoff_base (info), |
6de2ae4a | 4817 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
4818 | } |
4819 | else | |
4820 | { | |
4821 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 4822 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 4823 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
4824 | R_X86_64_DTPOFF64); |
4825 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 4826 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 4827 | &outrel); |
bffbf940 JJ |
4828 | } |
4829 | } | |
4830 | ||
67a4f2b7 | 4831 | dr_done: |
bffbf940 JJ |
4832 | if (h != NULL) |
4833 | h->got.offset |= 1; | |
4834 | else | |
4835 | local_got_offsets[r_symndx] |= 1; | |
4836 | } | |
4837 | ||
67a4f2b7 AO |
4838 | if (off >= (bfd_vma) -2 |
4839 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 4840 | abort (); |
351f65ca | 4841 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 4842 | { |
67a4f2b7 AO |
4843 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
4844 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
4845 | relocation = htab->elf.sgotplt->output_section->vma |
4846 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4847 | + offplt + htab->sgotplt_jump_table_size; |
4848 | else | |
6de2ae4a L |
4849 | relocation = htab->elf.sgot->output_section->vma |
4850 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 4851 | unresolved_reloc = FALSE; |
bffbf940 | 4852 | } |
142411ca | 4853 | else |
67a4f2b7 | 4854 | { |
142411ca | 4855 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 4856 | |
351f65ca | 4857 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 4858 | { |
52bc799a | 4859 | /* GD->IE transition. For 64bit, change |
142411ca L |
4860 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
4861 | .word 0x6666; rex64; call __tls_get_addr@plt | |
52bc799a | 4862 | into: |
142411ca | 4863 | movq %fs:0, %rax |
52bc799a L |
4864 | addq foo@gottpoff(%rip), %rax |
4865 | For 32bit, change | |
4866 | leaq foo@tlsgd(%rip), %rdi | |
4867 | .word 0x6666; rex64; call __tls_get_addr@plt | |
4868 | into: | |
4869 | movl %fs:0, %eax | |
5c98a14e JJ |
4870 | addq foo@gottpoff(%rip), %rax |
4871 | For largepic, change: | |
4872 | leaq foo@tlsgd(%rip), %rdi | |
4873 | movabsq $__tls_get_addr@pltoff, %rax | |
4874 | addq %rbx, %rax | |
4875 | call *%rax | |
4876 | into: | |
4877 | movq %fs:0, %rax | |
4878 | addq foo@gottpoff(%rax), %rax | |
4879 | nopw 0x0(%rax,%rax,1) */ | |
4880 | int largepic = 0; | |
4881 | if (ABI_64_P (output_bfd) | |
4882 | && contents[roff + 5] == (bfd_byte) '\xb8') | |
4883 | { | |
4884 | memcpy (contents + roff - 3, | |
4885 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
4886 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
4887 | largepic = 1; | |
4888 | } | |
4889 | else if (ABI_64_P (output_bfd)) | |
52bc799a L |
4890 | memcpy (contents + roff - 4, |
4891 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
4892 | 16); | |
4893 | else | |
4894 | memcpy (contents + roff - 3, | |
4895 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
4896 | 15); | |
142411ca | 4897 | |
6de2ae4a L |
4898 | relocation = (htab->elf.sgot->output_section->vma |
4899 | + htab->elf.sgot->output_offset + off | |
142411ca | 4900 | - roff |
5c98a14e | 4901 | - largepic |
142411ca L |
4902 | - input_section->output_section->vma |
4903 | - input_section->output_offset | |
4904 | - 12); | |
4905 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
4906 | contents + roff + 8 + largepic); |
4907 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca L |
4908 | rel++; |
4909 | continue; | |
4910 | } | |
351f65ca | 4911 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
4912 | { |
4913 | /* GDesc -> IE transition. | |
4914 | It's originally something like: | |
4915 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 4916 | |
142411ca | 4917 | Change it to: |
c9736ba0 | 4918 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 4919 | |
142411ca L |
4920 | /* Now modify the instruction as appropriate. To |
4921 | turn a leaq into a movq in the form we use it, it | |
4922 | suffices to change the second byte from 0x8d to | |
4923 | 0x8b. */ | |
4924 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
4925 | ||
4926 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4927 | htab->elf.sgot->output_section->vma |
4928 | + htab->elf.sgot->output_offset + off | |
142411ca L |
4929 | - rel->r_offset |
4930 | - input_section->output_section->vma | |
4931 | - input_section->output_offset | |
4932 | - 4, | |
4933 | contents + roff); | |
4934 | continue; | |
4935 | } | |
351f65ca | 4936 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
4937 | { |
4938 | /* GDesc -> IE transition. | |
4939 | It's originally: | |
4940 | call *(%rax) | |
4941 | ||
4942 | Change it to: | |
c9736ba0 | 4943 | xchg %ax, %ax. */ |
142411ca | 4944 | |
142411ca L |
4945 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
4946 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
4947 | continue; | |
4948 | } | |
4949 | else | |
4950 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 4951 | } |
bffbf940 JJ |
4952 | break; |
4953 | ||
4954 | case R_X86_64_TLSLD: | |
351f65ca L |
4955 | if (! elf_x86_64_tls_transition (info, input_bfd, |
4956 | input_section, contents, | |
4957 | symtab_hdr, sym_hashes, | |
4958 | &r_type, GOT_UNKNOWN, | |
4959 | rel, relend, h, r_symndx)) | |
142411ca | 4960 | return FALSE; |
a3fadc9a | 4961 | |
142411ca L |
4962 | if (r_type != R_X86_64_TLSLD) |
4963 | { | |
bffbf940 | 4964 | /* LD->LE transition: |
a3fadc9a | 4965 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr. |
52bc799a L |
4966 | For 64bit, we change it into: |
4967 | .word 0x6666; .byte 0x66; movq %fs:0, %rax. | |
4968 | For 32bit, we change it into: | |
5c98a14e JJ |
4969 | nopl 0x0(%rax); movl %fs:0, %eax. |
4970 | For largepic, change: | |
4971 | leaq foo@tlsgd(%rip), %rdi | |
4972 | movabsq $__tls_get_addr@pltoff, %rax | |
4973 | addq %rbx, %rax | |
4974 | call *%rax | |
4975 | into: | |
4976 | data32 data32 data32 nopw %cs:0x0(%rax,%rax,1) | |
4977 | movq %fs:0, %eax */ | |
142411ca L |
4978 | |
4979 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
5c98a14e JJ |
4980 | if (ABI_64_P (output_bfd) |
4981 | && contents[rel->r_offset + 5] == (bfd_byte) '\xb8') | |
4982 | memcpy (contents + rel->r_offset - 3, | |
4983 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
4984 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
4985 | else if (ABI_64_P (output_bfd)) | |
52bc799a L |
4986 | memcpy (contents + rel->r_offset - 3, |
4987 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
4988 | else | |
4989 | memcpy (contents + rel->r_offset - 3, | |
4990 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
5c98a14e | 4991 | /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */ |
bffbf940 JJ |
4992 | rel++; |
4993 | continue; | |
4994 | } | |
4995 | ||
6de2ae4a | 4996 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
4997 | abort (); |
4998 | ||
4999 | off = htab->tls_ld_got.offset; | |
5000 | if (off & 1) | |
5001 | off &= ~1; | |
5002 | else | |
5003 | { | |
5004 | Elf_Internal_Rela outrel; | |
bffbf940 | 5005 | |
6de2ae4a | 5006 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
5007 | abort (); |
5008 | ||
6de2ae4a L |
5009 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5010 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
5011 | |
5012 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 5013 | htab->elf.sgot->contents + off); |
bffbf940 | 5014 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 5015 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 5016 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 5017 | outrel.r_addend = 0; |
351f65ca | 5018 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 5019 | &outrel); |
bffbf940 JJ |
5020 | htab->tls_ld_got.offset |= 1; |
5021 | } | |
6de2ae4a L |
5022 | relocation = htab->elf.sgot->output_section->vma |
5023 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 5024 | unresolved_reloc = FALSE; |
bffbf940 JJ |
5025 | break; |
5026 | ||
5027 | case R_X86_64_DTPOFF32: | |
0e1862bb L |
5028 | if (!bfd_link_executable (info) |
5029 | || (input_section->flags & SEC_CODE) == 0) | |
351f65ca | 5030 | relocation -= elf_x86_64_dtpoff_base (info); |
bffbf940 | 5031 | else |
351f65ca | 5032 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5033 | break; |
5034 | ||
5035 | case R_X86_64_TPOFF32: | |
6769d501 | 5036 | case R_X86_64_TPOFF64: |
0e1862bb | 5037 | BFD_ASSERT (bfd_link_executable (info)); |
351f65ca | 5038 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
5039 | break; |
5040 | ||
a69ed7f7 L |
5041 | case R_X86_64_DTPOFF64: |
5042 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
5043 | relocation -= elf_x86_64_dtpoff_base (info); | |
5044 | break; | |
5045 | ||
70256ad8 AJ |
5046 | default: |
5047 | break; | |
5048 | } | |
8d88c4ca | 5049 | |
239e1f3a AM |
5050 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
5051 | because such sections are not SEC_ALLOC and thus ld.so will | |
5052 | not process them. */ | |
c434dee6 | 5053 | if (unresolved_reloc |
239e1f3a | 5054 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
5055 | && h->def_dynamic) |
5056 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
5057 | rel->r_offset) != (bfd_vma) -1) | |
a040981f L |
5058 | { |
5059 | (*_bfd_error_handler) | |
5060 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), | |
5061 | input_bfd, | |
5062 | input_section, | |
5063 | (long) rel->r_offset, | |
5064 | howto->name, | |
5065 | h->root.root.string); | |
5066 | return FALSE; | |
5067 | } | |
c434dee6 | 5068 | |
cbe950e9 | 5069 | do_relocation: |
8d88c4ca | 5070 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
5071 | contents, rel->r_offset, |
5072 | relocation, rel->r_addend); | |
8d88c4ca | 5073 | |
62d78908 | 5074 | check_relocation_error: |
8d88c4ca | 5075 | if (r != bfd_reloc_ok) |
8da6118f | 5076 | { |
c434dee6 AJ |
5077 | const char *name; |
5078 | ||
5079 | if (h != NULL) | |
5080 | name = h->root.root.string; | |
5081 | else | |
8da6118f | 5082 | { |
c434dee6 AJ |
5083 | name = bfd_elf_string_from_elf_section (input_bfd, |
5084 | symtab_hdr->sh_link, | |
5085 | sym->st_name); | |
5086 | if (name == NULL) | |
b34976b6 | 5087 | return FALSE; |
c434dee6 AJ |
5088 | if (*name == '\0') |
5089 | name = bfd_section_name (input_bfd, sec); | |
5090 | } | |
5091 | ||
5092 | if (r == bfd_reloc_overflow) | |
5093 | { | |
c434dee6 | 5094 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
5095 | (info, (h ? &h->root : NULL), name, howto->name, |
5096 | (bfd_vma) 0, input_bfd, input_section, | |
5097 | rel->r_offset))) | |
b34976b6 | 5098 | return FALSE; |
c434dee6 AJ |
5099 | } |
5100 | else | |
5101 | { | |
5102 | (*_bfd_error_handler) | |
bb95161d | 5103 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
d003868e | 5104 | input_bfd, input_section, |
c434dee6 | 5105 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 5106 | return FALSE; |
8da6118f KH |
5107 | } |
5108 | } | |
8d88c4ca | 5109 | } |
70256ad8 | 5110 | |
b34976b6 | 5111 | return TRUE; |
70256ad8 AJ |
5112 | } |
5113 | ||
5114 | /* Finish up dynamic symbol handling. We set the contents of various | |
5115 | dynamic sections here. */ | |
5116 | ||
b34976b6 | 5117 | static bfd_boolean |
351f65ca L |
5118 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
5119 | struct bfd_link_info *info, | |
5120 | struct elf_link_hash_entry *h, | |
220cf809 | 5121 | Elf_Internal_Sym *sym ATTRIBUTE_UNUSED) |
70256ad8 | 5122 | { |
351f65ca | 5123 | struct elf_x86_64_link_hash_table *htab; |
0ff2b86e L |
5124 | const struct elf_x86_64_backend_data *abed; |
5125 | bfd_boolean use_plt_bnd; | |
dd7e64d4 | 5126 | struct elf_x86_64_link_hash_entry *eh; |
70256ad8 | 5127 | |
351f65ca | 5128 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
5129 | if (htab == NULL) |
5130 | return FALSE; | |
70256ad8 | 5131 | |
0ff2b86e L |
5132 | /* Use MPX backend data in case of BND relocation. Use .plt_bnd |
5133 | section only if there is .plt section. */ | |
5134 | use_plt_bnd = htab->elf.splt != NULL && htab->plt_bnd != NULL; | |
5135 | abed = (use_plt_bnd | |
5136 | ? &elf_x86_64_bnd_arch_bed | |
5137 | : get_elf_x86_64_backend_data (output_bfd)); | |
5138 | ||
dd7e64d4 L |
5139 | eh = (struct elf_x86_64_link_hash_entry *) h; |
5140 | ||
70256ad8 AJ |
5141 | if (h->plt.offset != (bfd_vma) -1) |
5142 | { | |
70256ad8 | 5143 | bfd_vma plt_index; |
0ff2b86e L |
5144 | bfd_vma got_offset, plt_offset, plt_plt_offset, plt_got_offset; |
5145 | bfd_vma plt_plt_insn_end, plt_got_insn_size; | |
70256ad8 | 5146 | Elf_Internal_Rela rela; |
947216bf | 5147 | bfd_byte *loc; |
0ff2b86e | 5148 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 5149 | const struct elf_backend_data *bed; |
5974eba6 | 5150 | bfd_vma plt_got_pcrel_offset; |
cbe950e9 L |
5151 | |
5152 | /* When building a static executable, use .iplt, .igot.plt and | |
5153 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 5154 | if (htab->elf.splt != NULL) |
cbe950e9 | 5155 | { |
6de2ae4a L |
5156 | plt = htab->elf.splt; |
5157 | gotplt = htab->elf.sgotplt; | |
5158 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
5159 | } |
5160 | else | |
5161 | { | |
6de2ae4a L |
5162 | plt = htab->elf.iplt; |
5163 | gotplt = htab->elf.igotplt; | |
5164 | relplt = htab->elf.irelplt; | |
cbe950e9 | 5165 | } |
70256ad8 AJ |
5166 | |
5167 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 5168 | it up. */ |
cbe950e9 | 5169 | if ((h->dynindx == -1 |
0e1862bb | 5170 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
5171 | && h->def_regular |
5172 | && h->type == STT_GNU_IFUNC)) | |
5173 | || plt == NULL | |
5174 | || gotplt == NULL | |
5175 | || relplt == NULL) | |
cec7f46a | 5176 | abort (); |
70256ad8 AJ |
5177 | |
5178 | /* Get the index in the procedure linkage table which | |
5179 | corresponds to this symbol. This is the index of this symbol | |
5180 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 5181 | first entry in the procedure linkage table is reserved. |
6bbec505 | 5182 | |
cbe950e9 | 5183 | Get the offset into the .got table of the entry that |
407443a3 | 5184 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
5185 | bytes. The first three are reserved for the dynamic linker. |
5186 | ||
5187 | For static executables, we don't reserve anything. */ | |
5188 | ||
6de2ae4a | 5189 | if (plt == htab->elf.splt) |
cbe950e9 | 5190 | { |
eed180f8 | 5191 | got_offset = h->plt.offset / abed->plt_entry_size - 1; |
e1f98742 | 5192 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
5193 | } |
5194 | else | |
5195 | { | |
eed180f8 | 5196 | got_offset = h->plt.offset / abed->plt_entry_size; |
e1f98742 | 5197 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 5198 | } |
70256ad8 | 5199 | |
0ff2b86e L |
5200 | plt_plt_insn_end = abed->plt_plt_insn_end; |
5201 | plt_plt_offset = abed->plt_plt_offset; | |
5202 | plt_got_insn_size = abed->plt_got_insn_size; | |
5203 | plt_got_offset = abed->plt_got_offset; | |
5204 | if (use_plt_bnd) | |
5205 | { | |
5206 | /* Use the second PLT with BND relocations. */ | |
5207 | const bfd_byte *plt_entry, *plt2_entry; | |
0ff2b86e L |
5208 | |
5209 | if (eh->has_bnd_reloc) | |
5210 | { | |
5211 | plt_entry = elf_x86_64_bnd_plt_entry; | |
5212 | plt2_entry = elf_x86_64_bnd_plt2_entry; | |
5213 | } | |
5214 | else | |
5215 | { | |
5216 | plt_entry = elf_x86_64_legacy_plt_entry; | |
5217 | plt2_entry = elf_x86_64_legacy_plt2_entry; | |
5218 | ||
5219 | /* Subtract 1 since there is no BND prefix. */ | |
5220 | plt_plt_insn_end -= 1; | |
5221 | plt_plt_offset -= 1; | |
5222 | plt_got_insn_size -= 1; | |
5223 | plt_got_offset -= 1; | |
5224 | } | |
5225 | ||
5226 | BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry) | |
5227 | == sizeof (elf_x86_64_legacy_plt_entry)); | |
5228 | ||
5229 | /* Fill in the entry in the procedure linkage table. */ | |
5230 | memcpy (plt->contents + h->plt.offset, | |
5231 | plt_entry, sizeof (elf_x86_64_legacy_plt_entry)); | |
5232 | /* Fill in the entry in the second PLT. */ | |
5233 | memcpy (htab->plt_bnd->contents + eh->plt_bnd.offset, | |
5234 | plt2_entry, sizeof (elf_x86_64_legacy_plt2_entry)); | |
5235 | ||
5236 | resolved_plt = htab->plt_bnd; | |
5237 | plt_offset = eh->plt_bnd.offset; | |
5238 | } | |
5239 | else | |
5240 | { | |
5241 | /* Fill in the entry in the procedure linkage table. */ | |
5242 | memcpy (plt->contents + h->plt.offset, abed->plt_entry, | |
5243 | abed->plt_entry_size); | |
5244 | ||
5245 | resolved_plt = plt; | |
5246 | plt_offset = h->plt.offset; | |
5247 | } | |
eed180f8 RM |
5248 | |
5249 | /* Insert the relocation positions of the plt section. */ | |
5250 | ||
5251 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
5252 | subtracting the size of that instruction. */ | |
ab7fede8 L |
5253 | plt_got_pcrel_offset = (gotplt->output_section->vma |
5254 | + gotplt->output_offset | |
5255 | + got_offset | |
5256 | - resolved_plt->output_section->vma | |
5257 | - resolved_plt->output_offset | |
5258 | - plt_offset | |
5259 | - plt_got_insn_size); | |
5260 | ||
5261 | /* Check PC-relative offset overflow in PLT entry. */ | |
5974eba6 | 5262 | if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff) |
ab7fede8 L |
5263 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"), |
5264 | output_bfd, h->root.root.string); | |
5265 | ||
5266 | bfd_put_32 (output_bfd, plt_got_pcrel_offset, | |
0ff2b86e | 5267 | resolved_plt->contents + plt_offset + plt_got_offset); |
cbe950e9 | 5268 | |
653165cc | 5269 | /* Fill in the entry in the global offset table, initially this |
eed180f8 | 5270 | points to the second part of the PLT entry. */ |
cbe950e9 L |
5271 | bfd_put_64 (output_bfd, (plt->output_section->vma |
5272 | + plt->output_offset | |
eed180f8 | 5273 | + h->plt.offset + abed->plt_lazy_offset), |
cbe950e9 | 5274 | gotplt->contents + got_offset); |
70256ad8 AJ |
5275 | |
5276 | /* Fill in the entry in the .rela.plt section. */ | |
cbe950e9 L |
5277 | rela.r_offset = (gotplt->output_section->vma |
5278 | + gotplt->output_offset | |
70256ad8 | 5279 | + got_offset); |
cbe950e9 | 5280 | if (h->dynindx == -1 |
0e1862bb | 5281 | || ((bfd_link_executable (info) |
cbe950e9 L |
5282 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
5283 | && h->def_regular | |
5284 | && h->type == STT_GNU_IFUNC)) | |
5285 | { | |
5286 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
5287 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
351f65ca | 5288 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
cbe950e9 L |
5289 | rela.r_addend = (h->root.u.def.value |
5290 | + h->root.u.def.section->output_section->vma | |
5291 | + h->root.u.def.section->output_offset); | |
e1f98742 L |
5292 | /* R_X86_64_IRELATIVE comes last. */ |
5293 | plt_index = htab->next_irelative_index--; | |
cbe950e9 L |
5294 | } |
5295 | else | |
5296 | { | |
351f65ca | 5297 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); |
cbe950e9 | 5298 | rela.r_addend = 0; |
e1f98742 L |
5299 | plt_index = htab->next_jump_slot_index++; |
5300 | } | |
5301 | ||
5302 | /* Don't fill PLT entry for static executables. */ | |
5303 | if (plt == htab->elf.splt) | |
5304 | { | |
35a14c6b L |
5305 | bfd_vma plt0_offset = h->plt.offset + plt_plt_insn_end; |
5306 | ||
e1f98742 L |
5307 | /* Put relocation index. */ |
5308 | bfd_put_32 (output_bfd, plt_index, | |
eed180f8 | 5309 | plt->contents + h->plt.offset + abed->plt_reloc_offset); |
35a14c6b L |
5310 | |
5311 | /* Put offset for jmp .PLT0 and check for overflow. We don't | |
5312 | check relocation index for overflow since branch displacement | |
5313 | will overflow first. */ | |
5314 | if (plt0_offset > 0x80000000) | |
5315 | info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"), | |
5316 | output_bfd, h->root.root.string); | |
5317 | bfd_put_32 (output_bfd, - plt0_offset, | |
0ff2b86e | 5318 | plt->contents + h->plt.offset + plt_plt_offset); |
cbe950e9 | 5319 | } |
351f65ca L |
5320 | |
5321 | bed = get_elf_backend_data (output_bfd); | |
5322 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
82e96e07 | 5323 | bed->s->swap_reloca_out (output_bfd, &rela, loc); |
dd7e64d4 L |
5324 | } |
5325 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
5326 | { | |
5327 | bfd_vma got_offset, plt_offset, plt_got_offset, plt_got_insn_size; | |
5328 | asection *plt, *got; | |
5329 | bfd_boolean got_after_plt; | |
5330 | int32_t got_pcrel_offset; | |
5331 | const bfd_byte *got_plt_entry; | |
5332 | ||
5333 | /* Set the entry in the GOT procedure linkage table. */ | |
5334 | plt = htab->plt_got; | |
5335 | got = htab->elf.sgot; | |
5336 | got_offset = h->got.offset; | |
5337 | ||
5338 | if (got_offset == (bfd_vma) -1 | |
5339 | || h->type == STT_GNU_IFUNC | |
5340 | || plt == NULL | |
5341 | || got == NULL) | |
5342 | abort (); | |
70256ad8 | 5343 | |
dd7e64d4 L |
5344 | /* Use the second PLT entry template for the GOT PLT since they |
5345 | are the identical. */ | |
5346 | plt_got_insn_size = elf_x86_64_bnd_arch_bed.plt_got_insn_size; | |
5347 | plt_got_offset = elf_x86_64_bnd_arch_bed.plt_got_offset; | |
5348 | if (eh->has_bnd_reloc) | |
5349 | got_plt_entry = elf_x86_64_bnd_plt2_entry; | |
5350 | else | |
70256ad8 | 5351 | { |
dd7e64d4 L |
5352 | got_plt_entry = elf_x86_64_legacy_plt2_entry; |
5353 | ||
5354 | /* Subtract 1 since there is no BND prefix. */ | |
5355 | plt_got_insn_size -= 1; | |
5356 | plt_got_offset -= 1; | |
70256ad8 | 5357 | } |
dd7e64d4 L |
5358 | |
5359 | /* Fill in the entry in the GOT procedure linkage table. */ | |
5360 | plt_offset = eh->plt_got.offset; | |
5361 | memcpy (plt->contents + plt_offset, | |
5362 | got_plt_entry, sizeof (elf_x86_64_legacy_plt2_entry)); | |
5363 | ||
5364 | /* Put offset the PC-relative instruction referring to the GOT | |
5365 | entry, subtracting the size of that instruction. */ | |
5366 | got_pcrel_offset = (got->output_section->vma | |
5367 | + got->output_offset | |
5368 | + got_offset | |
5369 | - plt->output_section->vma | |
5370 | - plt->output_offset | |
5371 | - plt_offset | |
5372 | - plt_got_insn_size); | |
5373 | ||
5374 | /* Check PC-relative offset overflow in GOT PLT entry. */ | |
5375 | got_after_plt = got->output_section->vma > plt->output_section->vma; | |
5376 | if ((got_after_plt && got_pcrel_offset < 0) | |
5377 | || (!got_after_plt && got_pcrel_offset > 0)) | |
5378 | info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"), | |
5379 | output_bfd, h->root.root.string); | |
5380 | ||
5381 | bfd_put_32 (output_bfd, got_pcrel_offset, | |
5382 | plt->contents + plt_offset + plt_got_offset); | |
5383 | } | |
5384 | ||
5385 | if (!h->def_regular | |
5386 | && (h->plt.offset != (bfd_vma) -1 | |
5387 | || eh->plt_got.offset != (bfd_vma) -1)) | |
5388 | { | |
5389 | /* Mark the symbol as undefined, rather than as defined in | |
5390 | the .plt section. Leave the value if there were any | |
5391 | relocations where pointer equality matters (this is a clue | |
5392 | for the dynamic linker, to make function pointer | |
5393 | comparisons work between an application and shared | |
5394 | library), otherwise set it to zero. If a function is only | |
5395 | called from a binary, there is no need to slow down | |
5396 | shared libraries because of that. */ | |
5397 | sym->st_shndx = SHN_UNDEF; | |
5398 | if (!h->pointer_equality_needed) | |
5399 | sym->st_value = 0; | |
70256ad8 AJ |
5400 | } |
5401 | ||
bffbf940 | 5402 | if (h->got.offset != (bfd_vma) -1 |
351f65ca L |
5403 | && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type) |
5404 | && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE) | |
053579d7 | 5405 | { |
053579d7 AJ |
5406 | Elf_Internal_Rela rela; |
5407 | ||
5408 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 5409 | up. */ |
6de2ae4a | 5410 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 5411 | abort (); |
053579d7 | 5412 | |
6de2ae4a L |
5413 | rela.r_offset = (htab->elf.sgot->output_section->vma |
5414 | + htab->elf.sgot->output_offset | |
dc810e39 | 5415 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
5416 | |
5417 | /* If this is a static link, or it is a -Bsymbolic link and the | |
5418 | symbol is defined locally or was forced to be local because | |
5419 | of a version file, we just want to emit a RELATIVE reloc. | |
5420 | The entry in the global offset table will already have been | |
5421 | initialized in the relocate_section function. */ | |
710ab287 | 5422 | if (h->def_regular |
0018b0a3 L |
5423 | && h->type == STT_GNU_IFUNC) |
5424 | { | |
0e1862bb | 5425 | if (bfd_link_pic (info)) |
710ab287 L |
5426 | { |
5427 | /* Generate R_X86_64_GLOB_DAT. */ | |
5428 | goto do_glob_dat; | |
5429 | } | |
5430 | else | |
5431 | { | |
90d60710 L |
5432 | asection *plt; |
5433 | ||
710ab287 L |
5434 | if (!h->pointer_equality_needed) |
5435 | abort (); | |
5436 | ||
5437 | /* For non-shared object, we can't use .got.plt, which | |
5438 | contains the real function addres if we need pointer | |
5439 | equality. We load the GOT entry with the PLT entry. */ | |
90d60710 | 5440 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
5441 | bfd_put_64 (output_bfd, (plt->output_section->vma |
5442 | + plt->output_offset | |
5443 | + h->plt.offset), | |
6de2ae4a | 5444 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
5445 | return TRUE; |
5446 | } | |
0018b0a3 | 5447 | } |
0e1862bb | 5448 | else if (bfd_link_pic (info) |
0018b0a3 | 5449 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
053579d7 | 5450 | { |
41bed6dd L |
5451 | if (!h->def_regular) |
5452 | return FALSE; | |
cc78d0af | 5453 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 5454 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
5455 | rela.r_addend = (h->root.u.def.value |
5456 | + h->root.u.def.section->output_section->vma | |
5457 | + h->root.u.def.section->output_offset); | |
5458 | } | |
5459 | else | |
5460 | { | |
5461 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 5462 | do_glob_dat: |
c434dee6 | 5463 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 5464 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 5465 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
5466 | rela.r_addend = 0; |
5467 | } | |
5468 | ||
351f65ca | 5469 | elf_append_rela (output_bfd, htab->elf.srelgot, &rela); |
053579d7 AJ |
5470 | } |
5471 | ||
f5385ebf | 5472 | if (h->needs_copy) |
70256ad8 | 5473 | { |
70256ad8 AJ |
5474 | Elf_Internal_Rela rela; |
5475 | ||
5476 | /* This symbol needs a copy reloc. Set it up. */ | |
5477 | ||
c434dee6 AJ |
5478 | if (h->dynindx == -1 |
5479 | || (h->root.type != bfd_link_hash_defined | |
5480 | && h->root.type != bfd_link_hash_defweak) | |
5481 | || htab->srelbss == NULL) | |
5482 | abort (); | |
70256ad8 AJ |
5483 | |
5484 | rela.r_offset = (h->root.u.def.value | |
5485 | + h->root.u.def.section->output_section->vma | |
5486 | + h->root.u.def.section->output_offset); | |
351f65ca | 5487 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 5488 | rela.r_addend = 0; |
351f65ca | 5489 | elf_append_rela (output_bfd, htab->srelbss, &rela); |
70256ad8 AJ |
5490 | } |
5491 | ||
b34976b6 | 5492 | return TRUE; |
70256ad8 AJ |
5493 | } |
5494 | ||
c25bc9fc L |
5495 | /* Finish up local dynamic symbol handling. We set the contents of |
5496 | various dynamic sections here. */ | |
5497 | ||
5498 | static bfd_boolean | |
351f65ca | 5499 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
5500 | { |
5501 | struct elf_link_hash_entry *h | |
5502 | = (struct elf_link_hash_entry *) *slot; | |
5503 | struct bfd_link_info *info | |
eed180f8 | 5504 | = (struct bfd_link_info *) inf; |
c25bc9fc | 5505 | |
351f65ca | 5506 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
c25bc9fc L |
5507 | info, h, NULL); |
5508 | } | |
5509 | ||
c434dee6 AJ |
5510 | /* Used to decide how to sort relocs in an optimal manner for the |
5511 | dynamic linker, before writing them out. */ | |
5512 | ||
5513 | static enum elf_reloc_type_class | |
cae1fbbb | 5514 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
5515 | const asection *rel_sec ATTRIBUTE_UNUSED, |
5516 | const Elf_Internal_Rela *rela) | |
c434dee6 | 5517 | { |
cae1fbbb L |
5518 | bfd *abfd = info->output_bfd; |
5519 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
5520 | struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info); | |
5521 | unsigned long r_symndx = htab->r_sym (rela->r_info); | |
5522 | Elf_Internal_Sym sym; | |
5523 | ||
5524 | if (htab->elf.dynsym == NULL | |
5525 | || !bed->s->swap_symbol_in (abfd, | |
5526 | (htab->elf.dynsym->contents | |
5527 | + r_symndx * bed->s->sizeof_sym), | |
5528 | 0, &sym)) | |
5529 | abort (); | |
5530 | ||
5531 | /* Check relocation against STT_GNU_IFUNC symbol. */ | |
5532 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) | |
5533 | return reloc_class_ifunc; | |
5534 | ||
351f65ca | 5535 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 AJ |
5536 | { |
5537 | case R_X86_64_RELATIVE: | |
1da80baa | 5538 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
5539 | return reloc_class_relative; |
5540 | case R_X86_64_JUMP_SLOT: | |
5541 | return reloc_class_plt; | |
5542 | case R_X86_64_COPY: | |
5543 | return reloc_class_copy; | |
5544 | default: | |
5545 | return reloc_class_normal; | |
5546 | } | |
5547 | } | |
5548 | ||
70256ad8 AJ |
5549 | /* Finish up the dynamic sections. */ |
5550 | ||
b34976b6 | 5551 | static bfd_boolean |
351f65ca L |
5552 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
5553 | struct bfd_link_info *info) | |
70256ad8 | 5554 | { |
351f65ca | 5555 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
5556 | bfd *dynobj; |
5557 | asection *sdyn; | |
0ff2b86e | 5558 | const struct elf_x86_64_backend_data *abed; |
70256ad8 | 5559 | |
351f65ca | 5560 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
5561 | if (htab == NULL) |
5562 | return FALSE; | |
5563 | ||
0ff2b86e L |
5564 | /* Use MPX backend data in case of BND relocation. Use .plt_bnd |
5565 | section only if there is .plt section. */ | |
5566 | abed = (htab->elf.splt != NULL && htab->plt_bnd != NULL | |
5567 | ? &elf_x86_64_bnd_arch_bed | |
5568 | : get_elf_x86_64_backend_data (output_bfd)); | |
5569 | ||
c434dee6 | 5570 | dynobj = htab->elf.dynobj; |
3d4d4302 | 5571 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
70256ad8 | 5572 | |
c434dee6 | 5573 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 5574 | { |
82e96e07 L |
5575 | bfd_byte *dyncon, *dynconend; |
5576 | const struct elf_backend_data *bed; | |
5577 | bfd_size_type sizeof_dyn; | |
70256ad8 | 5578 | |
6de2ae4a | 5579 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 5580 | abort (); |
70256ad8 | 5581 | |
82e96e07 L |
5582 | bed = get_elf_backend_data (dynobj); |
5583 | sizeof_dyn = bed->s->sizeof_dyn; | |
5584 | dyncon = sdyn->contents; | |
5585 | dynconend = sdyn->contents + sdyn->size; | |
5586 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
5587 | { |
5588 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
5589 | asection *s; |
5590 | ||
82e96e07 | 5591 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
5592 | |
5593 | switch (dyn.d_tag) | |
5594 | { | |
5595 | default: | |
053579d7 | 5596 | continue; |
70256ad8 AJ |
5597 | |
5598 | case DT_PLTGOT: | |
6de2ae4a | 5599 | s = htab->elf.sgotplt; |
8c37241b | 5600 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 5601 | break; |
70256ad8 AJ |
5602 | |
5603 | case DT_JMPREL: | |
6de2ae4a | 5604 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 5605 | break; |
70256ad8 | 5606 | |
c434dee6 | 5607 | case DT_PLTRELSZ: |
6de2ae4a | 5608 | s = htab->elf.srelplt->output_section; |
eea6121a | 5609 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
5610 | break; |
5611 | ||
5612 | case DT_RELASZ: | |
c434dee6 AJ |
5613 | /* The procedure linkage table relocs (DT_JMPREL) should |
5614 | not be included in the overall relocs (DT_RELA). | |
5615 | Therefore, we override the DT_RELASZ entry here to | |
5616 | make it not include the JMPREL relocs. Since the | |
5617 | linker script arranges for .rela.plt to follow all | |
5618 | other relocation sections, we don't have to worry | |
5619 | about changing the DT_RELA entry. */ | |
6de2ae4a | 5620 | if (htab->elf.srelplt != NULL) |
70256ad8 | 5621 | { |
6de2ae4a | 5622 | s = htab->elf.srelplt->output_section; |
eea6121a | 5623 | dyn.d_un.d_val -= s->size; |
70256ad8 AJ |
5624 | } |
5625 | break; | |
67a4f2b7 AO |
5626 | |
5627 | case DT_TLSDESC_PLT: | |
6de2ae4a | 5628 | s = htab->elf.splt; |
67a4f2b7 AO |
5629 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
5630 | + htab->tlsdesc_plt; | |
5631 | break; | |
5632 | ||
5633 | case DT_TLSDESC_GOT: | |
6de2ae4a | 5634 | s = htab->elf.sgot; |
67a4f2b7 AO |
5635 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
5636 | + htab->tlsdesc_got; | |
5637 | break; | |
70256ad8 | 5638 | } |
c434dee6 | 5639 | |
82e96e07 | 5640 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
5641 | } |
5642 | ||
c434dee6 | 5643 | /* Fill in the special first entry in the procedure linkage table. */ |
6de2ae4a | 5644 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 5645 | { |
653165cc | 5646 | /* Fill in the first entry in the procedure linkage table. */ |
eed180f8 RM |
5647 | memcpy (htab->elf.splt->contents, |
5648 | abed->plt0_entry, abed->plt_entry_size); | |
653165cc AJ |
5649 | /* Add offset for pushq GOT+8(%rip), since the instruction |
5650 | uses 6 bytes subtract this value. */ | |
5651 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
5652 | (htab->elf.sgotplt->output_section->vma |
5653 | + htab->elf.sgotplt->output_offset | |
653165cc | 5654 | + 8 |
6de2ae4a L |
5655 | - htab->elf.splt->output_section->vma |
5656 | - htab->elf.splt->output_offset | |
653165cc | 5657 | - 6), |
eed180f8 RM |
5658 | htab->elf.splt->contents + abed->plt0_got1_offset); |
5659 | /* Add offset for the PC-relative instruction accessing GOT+16, | |
5660 | subtracting the offset to the end of that instruction. */ | |
653165cc | 5661 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5662 | (htab->elf.sgotplt->output_section->vma |
5663 | + htab->elf.sgotplt->output_offset | |
653165cc | 5664 | + 16 |
6de2ae4a L |
5665 | - htab->elf.splt->output_section->vma |
5666 | - htab->elf.splt->output_offset | |
eed180f8 RM |
5667 | - abed->plt0_got2_insn_end), |
5668 | htab->elf.splt->contents + abed->plt0_got2_offset); | |
653165cc | 5669 | |
eed180f8 RM |
5670 | elf_section_data (htab->elf.splt->output_section) |
5671 | ->this_hdr.sh_entsize = abed->plt_entry_size; | |
67a4f2b7 AO |
5672 | |
5673 | if (htab->tlsdesc_plt) | |
5674 | { | |
5675 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6de2ae4a | 5676 | htab->elf.sgot->contents + htab->tlsdesc_got); |
67a4f2b7 | 5677 | |
6de2ae4a | 5678 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, |
eed180f8 | 5679 | abed->plt0_entry, abed->plt_entry_size); |
67a4f2b7 AO |
5680 | |
5681 | /* Add offset for pushq GOT+8(%rip), since the | |
5682 | instruction uses 6 bytes subtract this value. */ | |
5683 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
5684 | (htab->elf.sgotplt->output_section->vma |
5685 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 5686 | + 8 |
6de2ae4a L |
5687 | - htab->elf.splt->output_section->vma |
5688 | - htab->elf.splt->output_offset | |
67a4f2b7 AO |
5689 | - htab->tlsdesc_plt |
5690 | - 6), | |
eed180f8 RM |
5691 | htab->elf.splt->contents |
5692 | + htab->tlsdesc_plt + abed->plt0_got1_offset); | |
5693 | /* Add offset for the PC-relative instruction accessing GOT+TDG, | |
5694 | where TGD stands for htab->tlsdesc_got, subtracting the offset | |
5695 | to the end of that instruction. */ | |
67a4f2b7 | 5696 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5697 | (htab->elf.sgot->output_section->vma |
5698 | + htab->elf.sgot->output_offset | |
67a4f2b7 | 5699 | + htab->tlsdesc_got |
6de2ae4a L |
5700 | - htab->elf.splt->output_section->vma |
5701 | - htab->elf.splt->output_offset | |
67a4f2b7 | 5702 | - htab->tlsdesc_plt |
eed180f8 RM |
5703 | - abed->plt0_got2_insn_end), |
5704 | htab->elf.splt->contents | |
5705 | + htab->tlsdesc_plt + abed->plt0_got2_offset); | |
67a4f2b7 | 5706 | } |
70256ad8 | 5707 | } |
70256ad8 AJ |
5708 | } |
5709 | ||
0ff2b86e L |
5710 | if (htab->plt_bnd != NULL) |
5711 | elf_section_data (htab->plt_bnd->output_section) | |
5712 | ->this_hdr.sh_entsize = sizeof (elf_x86_64_bnd_plt2_entry); | |
5713 | ||
6de2ae4a | 5714 | if (htab->elf.sgotplt) |
70256ad8 | 5715 | { |
56d4289c L |
5716 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
5717 | { | |
5718 | (*_bfd_error_handler) | |
5719 | (_("discarded output section: `%A'"), htab->elf.sgotplt); | |
5720 | return FALSE; | |
5721 | } | |
5722 | ||
c434dee6 | 5723 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 5724 | if (htab->elf.sgotplt->size > 0) |
c434dee6 AJ |
5725 | { |
5726 | /* Set the first entry in the global offset table to the address of | |
5727 | the dynamic section. */ | |
5728 | if (sdyn == NULL) | |
6de2ae4a | 5729 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); |
c434dee6 AJ |
5730 | else |
5731 | bfd_put_64 (output_bfd, | |
5732 | sdyn->output_section->vma + sdyn->output_offset, | |
6de2ae4a | 5733 | htab->elf.sgotplt->contents); |
c434dee6 | 5734 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
6de2ae4a L |
5735 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); |
5736 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
c434dee6 | 5737 | } |
70256ad8 | 5738 | |
6de2ae4a | 5739 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = |
c434dee6 AJ |
5740 | GOT_ENTRY_SIZE; |
5741 | } | |
70256ad8 | 5742 | |
e41b3a13 | 5743 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
5744 | if (htab->plt_eh_frame != NULL |
5745 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
5746 | { |
5747 | if (htab->elf.splt != NULL | |
5748 | && htab->elf.splt->size != 0 | |
5749 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
5750 | && htab->elf.splt->output_section != NULL | |
5751 | && htab->plt_eh_frame->output_section != NULL) | |
5752 | { | |
5753 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
5754 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
5755 | + htab->plt_eh_frame->output_offset | |
5756 | + PLT_FDE_START_OFFSET; | |
5757 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5758 | htab->plt_eh_frame->contents | |
5759 | + PLT_FDE_START_OFFSET); | |
5760 | } | |
dbaa2011 | 5761 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
5762 | { |
5763 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5764 | htab->plt_eh_frame, | |
5765 | htab->plt_eh_frame->contents)) | |
5766 | return FALSE; | |
5767 | } | |
5768 | } | |
5769 | ||
6de2ae4a L |
5770 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
5771 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
5772 | = GOT_ENTRY_SIZE; |
5773 | ||
c25bc9fc L |
5774 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
5775 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 5776 | elf_x86_64_finish_local_dynamic_symbol, |
c25bc9fc L |
5777 | info); |
5778 | ||
b34976b6 | 5779 | return TRUE; |
8d88c4ca NC |
5780 | } |
5781 | ||
3972882e | 5782 | /* Return an array of PLT entry symbol values. */ |
4c45e5c9 | 5783 | |
3972882e L |
5784 | static bfd_vma * |
5785 | elf_x86_64_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt, | |
5786 | asection *relplt) | |
4c45e5c9 | 5787 | { |
3972882e L |
5788 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
5789 | arelent *p; | |
5790 | long count, i; | |
5791 | bfd_vma *plt_sym_val; | |
144bed8d | 5792 | bfd_vma plt_offset; |
3972882e L |
5793 | bfd_byte *plt_contents; |
5794 | const struct elf_x86_64_backend_data *bed; | |
5795 | Elf_Internal_Shdr *hdr; | |
5796 | asection *plt_bnd; | |
144bed8d | 5797 | |
3972882e L |
5798 | /* Get the .plt section contents. PLT passed down may point to the |
5799 | .plt.bnd section. Make sure that PLT always points to the .plt | |
5800 | section. */ | |
5801 | plt_bnd = bfd_get_section_by_name (abfd, ".plt.bnd"); | |
5802 | if (plt_bnd) | |
5803 | { | |
5804 | if (plt != plt_bnd) | |
5805 | abort (); | |
5806 | plt = bfd_get_section_by_name (abfd, ".plt"); | |
5807 | if (plt == NULL) | |
5808 | abort (); | |
5809 | bed = &elf_x86_64_bnd_arch_bed; | |
5810 | } | |
5811 | else | |
5812 | bed = get_elf_x86_64_backend_data (abfd); | |
cca5b8b6 | 5813 | |
3972882e L |
5814 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); |
5815 | if (plt_contents == NULL) | |
5816 | return NULL; | |
5817 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
5818 | plt_contents, 0, plt->size)) | |
144bed8d | 5819 | { |
3972882e L |
5820 | bad_return: |
5821 | free (plt_contents); | |
5822 | return NULL; | |
144bed8d L |
5823 | } |
5824 | ||
3972882e L |
5825 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
5826 | if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) | |
5827 | goto bad_return; | |
144bed8d | 5828 | |
3972882e L |
5829 | hdr = &elf_section_data (relplt)->this_hdr; |
5830 | count = relplt->size / hdr->sh_entsize; | |
144bed8d | 5831 | |
3972882e L |
5832 | plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count); |
5833 | if (plt_sym_val == NULL) | |
5834 | goto bad_return; | |
cca5b8b6 | 5835 | |
35181b3e | 5836 | for (i = 0; i < count; i++) |
3972882e | 5837 | plt_sym_val[i] = -1; |
cca5b8b6 | 5838 | |
3972882e L |
5839 | plt_offset = bed->plt_entry_size; |
5840 | p = relplt->relocation; | |
5841 | for (i = 0; i < count; i++, p++) | |
144bed8d | 5842 | { |
3972882e | 5843 | long reloc_index; |
144bed8d | 5844 | |
6f25f223 | 5845 | /* Skip unknown relocation. */ |
533d0af0 | 5846 | if (p->howto == NULL) |
6f25f223 | 5847 | continue; |
533d0af0 | 5848 | |
3972882e L |
5849 | if (p->howto->type != R_X86_64_JUMP_SLOT |
5850 | && p->howto->type != R_X86_64_IRELATIVE) | |
5851 | continue; | |
144bed8d | 5852 | |
3972882e L |
5853 | reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset |
5854 | + bed->plt_reloc_offset)); | |
5855 | if (reloc_index >= count) | |
5856 | abort (); | |
5857 | if (plt_bnd) | |
144bed8d L |
5858 | { |
5859 | /* This is the index in .plt section. */ | |
5860 | long plt_index = plt_offset / bed->plt_entry_size; | |
3972882e L |
5861 | /* Store VMA + the offset in .plt.bnd section. */ |
5862 | plt_sym_val[reloc_index] = | |
5863 | (plt_bnd->vma | |
5864 | + (plt_index - 1) * sizeof (elf_x86_64_legacy_plt2_entry)); | |
144bed8d | 5865 | } |
3972882e L |
5866 | else |
5867 | plt_sym_val[reloc_index] = plt->vma + plt_offset; | |
144bed8d | 5868 | plt_offset += bed->plt_entry_size; |
fca6ae69 L |
5869 | |
5870 | /* PR binutils/18437: Skip extra relocations in the .rela.plt | |
5871 | section. */ | |
5872 | if (plt_offset >= plt->size) | |
5873 | break; | |
144bed8d L |
5874 | } |
5875 | ||
3972882e L |
5876 | free (plt_contents); |
5877 | ||
5878 | return plt_sym_val; | |
4c45e5c9 | 5879 | } |
8df9fc9d | 5880 | |
0ff2b86e L |
5881 | /* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section |
5882 | support. */ | |
5883 | ||
5884 | static long | |
5885 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
5886 | long symcount, | |
5887 | asymbol **syms, | |
5888 | long dynsymcount, | |
5889 | asymbol **dynsyms, | |
5890 | asymbol **ret) | |
5891 | { | |
3972882e L |
5892 | /* Pass the .plt.bnd section to _bfd_elf_ifunc_get_synthetic_symtab |
5893 | as PLT if it exists. */ | |
5894 | asection *plt = bfd_get_section_by_name (abfd, ".plt.bnd"); | |
0ff2b86e | 5895 | if (plt == NULL) |
3972882e L |
5896 | plt = bfd_get_section_by_name (abfd, ".plt"); |
5897 | return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms, | |
5898 | dynsymcount, dynsyms, ret, | |
5899 | plt, | |
5900 | elf_x86_64_get_plt_sym_val); | |
0ff2b86e L |
5901 | } |
5902 | ||
d2b2c203 DJ |
5903 | /* Handle an x86-64 specific section when reading an object file. This |
5904 | is called when elfcode.h finds a section with an unknown type. */ | |
5905 | ||
5906 | static bfd_boolean | |
0c723101 L |
5907 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
5908 | const char *name, int shindex) | |
d2b2c203 DJ |
5909 | { |
5910 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
5911 | return FALSE; | |
5912 | ||
6dc132d9 | 5913 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
5914 | return FALSE; |
5915 | ||
5916 | return TRUE; | |
5917 | } | |
5918 | ||
3b22753a L |
5919 | /* Hook called by the linker routine which adds symbols from an object |
5920 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
5921 | of .bss. */ | |
5922 | ||
5923 | static bfd_boolean | |
351f65ca L |
5924 | elf_x86_64_add_symbol_hook (bfd *abfd, |
5925 | struct bfd_link_info *info, | |
5926 | Elf_Internal_Sym *sym, | |
5927 | const char **namep ATTRIBUTE_UNUSED, | |
5928 | flagword *flagsp ATTRIBUTE_UNUSED, | |
5929 | asection **secp, | |
5930 | bfd_vma *valp) | |
3b22753a L |
5931 | { |
5932 | asection *lcomm; | |
5933 | ||
5934 | switch (sym->st_shndx) | |
5935 | { | |
5936 | case SHN_X86_64_LCOMMON: | |
5937 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
5938 | if (lcomm == NULL) | |
5939 | { | |
5940 | lcomm = bfd_make_section_with_flags (abfd, | |
5941 | "LARGE_COMMON", | |
5942 | (SEC_ALLOC | |
5943 | | SEC_IS_COMMON | |
5944 | | SEC_LINKER_CREATED)); | |
5945 | if (lcomm == NULL) | |
5946 | return FALSE; | |
5947 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
5948 | } | |
5949 | *secp = lcomm; | |
5950 | *valp = sym->st_size; | |
c35bdf6e | 5951 | return TRUE; |
3b22753a | 5952 | } |
d8045f23 | 5953 | |
13a2df29 | 5954 | if (ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE |
f1885d1e AM |
5955 | && (abfd->flags & DYNAMIC) == 0 |
5956 | && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) | |
13a2df29 L |
5957 | elf_tdata (info->output_bfd)->has_gnu_symbols |
5958 | |= elf_gnu_symbol_unique; | |
d8045f23 | 5959 | |
3b22753a L |
5960 | return TRUE; |
5961 | } | |
5962 | ||
5963 | ||
5964 | /* Given a BFD section, try to locate the corresponding ELF section | |
5965 | index. */ | |
5966 | ||
5967 | static bfd_boolean | |
351f65ca L |
5968 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
5969 | asection *sec, int *index_return) | |
3b22753a L |
5970 | { |
5971 | if (sec == &_bfd_elf_large_com_section) | |
5972 | { | |
91d6fa6a | 5973 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
5974 | return TRUE; |
5975 | } | |
5976 | return FALSE; | |
5977 | } | |
5978 | ||
5979 | /* Process a symbol. */ | |
5980 | ||
5981 | static void | |
351f65ca L |
5982 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
5983 | asymbol *asym) | |
3b22753a L |
5984 | { |
5985 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
5986 | ||
5987 | switch (elfsym->internal_elf_sym.st_shndx) | |
5988 | { | |
5989 | case SHN_X86_64_LCOMMON: | |
5990 | asym->section = &_bfd_elf_large_com_section; | |
5991 | asym->value = elfsym->internal_elf_sym.st_size; | |
5992 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
5993 | asym->flags &= ~BSF_GLOBAL; | |
5994 | break; | |
5995 | } | |
5996 | } | |
5997 | ||
5998 | static bfd_boolean | |
351f65ca | 5999 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
6000 | { |
6001 | return (sym->st_shndx == SHN_COMMON | |
6002 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
6003 | } | |
6004 | ||
6005 | static unsigned int | |
351f65ca | 6006 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
6007 | { |
6008 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
6009 | return SHN_COMMON; | |
6010 | else | |
6011 | return SHN_X86_64_LCOMMON; | |
6012 | } | |
6013 | ||
6014 | static asection * | |
351f65ca | 6015 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
6016 | { |
6017 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
6018 | return bfd_com_section_ptr; | |
6019 | else | |
6020 | return &_bfd_elf_large_com_section; | |
6021 | } | |
6022 | ||
6023 | static bfd_boolean | |
5d13b3b3 AM |
6024 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
6025 | const Elf_Internal_Sym *sym, | |
351f65ca | 6026 | asection **psec, |
5d13b3b3 AM |
6027 | bfd_boolean newdef, |
6028 | bfd_boolean olddef, | |
351f65ca | 6029 | bfd *oldbfd, |
5d13b3b3 | 6030 | const asection *oldsec) |
3b22753a L |
6031 | { |
6032 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
6033 | normal common symbol. We turn the large common symbol into a |
6034 | normal one. */ | |
5d13b3b3 | 6035 | if (!olddef |
3b22753a | 6036 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
6037 | && !newdef |
6038 | && bfd_is_com_section (*psec) | |
6039 | && oldsec != *psec) | |
3b22753a | 6040 | { |
00492999 | 6041 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 6042 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
6043 | { |
6044 | h->root.u.c.p->section | |
6045 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
6046 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
6047 | } | |
6048 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
6049 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
6050 | *psec = bfd_com_section_ptr; | |
3b22753a L |
6051 | } |
6052 | ||
6053 | return TRUE; | |
6054 | } | |
6055 | ||
6056 | static int | |
351f65ca L |
6057 | elf_x86_64_additional_program_headers (bfd *abfd, |
6058 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
6059 | { |
6060 | asection *s; | |
9a2e389a | 6061 | int count = 0; |
3b22753a L |
6062 | |
6063 | /* Check to see if we need a large readonly segment. */ | |
6064 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
6065 | if (s && (s->flags & SEC_LOAD)) | |
6066 | count++; | |
6067 | ||
6068 | /* Check to see if we need a large data segment. Since .lbss sections | |
6069 | is placed right after the .bss section, there should be no need for | |
6070 | a large data segment just because of .lbss. */ | |
6071 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
6072 | if (s && (s->flags & SEC_LOAD)) | |
6073 | count++; | |
6074 | ||
6075 | return count; | |
6076 | } | |
6077 | ||
fdc90cb4 JJ |
6078 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
6079 | ||
6080 | static bfd_boolean | |
351f65ca | 6081 | elf_x86_64_hash_symbol (struct elf_link_hash_entry *h) |
fdc90cb4 JJ |
6082 | { |
6083 | if (h->plt.offset != (bfd_vma) -1 | |
6084 | && !h->def_regular | |
6085 | && !h->pointer_equality_needed) | |
6086 | return FALSE; | |
6087 | ||
6088 | return _bfd_elf_hash_symbol (h); | |
6089 | } | |
6090 | ||
c543bf9a L |
6091 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
6092 | ||
6093 | static bfd_boolean | |
6094 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
6095 | const bfd_target *output) | |
6096 | { | |
6097 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
6098 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
6099 | && _bfd_elf_relocs_compatible (input, output)); | |
6100 | } | |
6101 | ||
9a2e389a | 6102 | static const struct bfd_elf_special_section |
351f65ca | 6103 | elf_x86_64_special_sections[]= |
3b22753a | 6104 | { |
0112cd26 NC |
6105 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
6106 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
6107 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
6108 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
6109 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
6110 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
6111 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
6112 | }; |
6113 | ||
6d00b590 | 6114 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
6115 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
6116 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 6117 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 6118 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 6119 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 6120 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 6121 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
6122 | |
6123 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 6124 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
6125 | #define elf_backend_want_got_plt 1 |
6126 | #define elf_backend_plt_readonly 1 | |
6127 | #define elf_backend_want_plt_sym 0 | |
6128 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 6129 | #define elf_backend_rela_normal 1 |
e41b3a13 | 6130 | #define elf_backend_plt_alignment 4 |
f7483970 | 6131 | #define elf_backend_extern_protected_data 1 |
70256ad8 | 6132 | |
351f65ca | 6133 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 6134 | |
70256ad8 | 6135 | #define bfd_elf64_bfd_link_hash_table_create \ |
351f65ca | 6136 | elf_x86_64_link_hash_table_create |
351f65ca | 6137 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 6138 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 6139 | elf_x86_64_reloc_name_lookup |
70256ad8 | 6140 | |
351f65ca | 6141 | #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol |
c543bf9a | 6142 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca L |
6143 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
6144 | #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol | |
6145 | #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections | |
6146 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections | |
6147 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
6148 | #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook | |
6149 | #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook | |
6150 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus | |
6151 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
6152 | #ifdef CORE_HEADER |
6153 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
6154 | #endif | |
351f65ca L |
6155 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
6156 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
6157 | #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections | |
6158 | #define elf_backend_always_size_sections elf_x86_64_always_size_sections | |
74541ad4 | 6159 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
407443a3 | 6160 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
351f65ca | 6161 | #define bfd_elf64_mkobject elf_x86_64_mkobject |
0ff2b86e | 6162 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 6163 | |
d2b2c203 | 6164 | #define elf_backend_section_from_shdr \ |
351f65ca | 6165 | elf_x86_64_section_from_shdr |
d2b2c203 | 6166 | |
3b22753a | 6167 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 6168 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 6169 | #define elf_backend_add_symbol_hook \ |
351f65ca | 6170 | elf_x86_64_add_symbol_hook |
3b22753a | 6171 | #define elf_backend_symbol_processing \ |
351f65ca | 6172 | elf_x86_64_symbol_processing |
3b22753a | 6173 | #define elf_backend_common_section_index \ |
351f65ca | 6174 | elf_x86_64_common_section_index |
3b22753a | 6175 | #define elf_backend_common_section \ |
351f65ca | 6176 | elf_x86_64_common_section |
3b22753a | 6177 | #define elf_backend_common_definition \ |
351f65ca | 6178 | elf_x86_64_common_definition |
3b22753a | 6179 | #define elf_backend_merge_symbol \ |
351f65ca | 6180 | elf_x86_64_merge_symbol |
3b22753a | 6181 | #define elf_backend_special_sections \ |
351f65ca | 6182 | elf_x86_64_special_sections |
3b22753a | 6183 | #define elf_backend_additional_program_headers \ |
351f65ca | 6184 | elf_x86_64_additional_program_headers |
fdc90cb4 | 6185 | #define elf_backend_hash_symbol \ |
351f65ca | 6186 | elf_x86_64_hash_symbol |
3b22753a | 6187 | |
8d88c4ca | 6188 | #include "elf64-target.h" |
9d7cbccd | 6189 | |
6036f486 ES |
6190 | /* CloudABI support. */ |
6191 | ||
6192 | #undef TARGET_LITTLE_SYM | |
6193 | #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec | |
6194 | #undef TARGET_LITTLE_NAME | |
6195 | #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi" | |
6196 | ||
6197 | #undef ELF_OSABI | |
6198 | #define ELF_OSABI ELFOSABI_CLOUDABI | |
6199 | ||
6200 | #undef elf64_bed | |
6201 | #define elf64_bed elf64_x86_64_cloudabi_bed | |
6202 | ||
6203 | #include "elf64-target.h" | |
6204 | ||
9d7cbccd NC |
6205 | /* FreeBSD support. */ |
6206 | ||
6207 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6208 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
9d7cbccd NC |
6209 | #undef TARGET_LITTLE_NAME |
6210 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
6211 | ||
d1036acb L |
6212 | #undef ELF_OSABI |
6213 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 6214 | |
9d7cbccd NC |
6215 | #undef elf64_bed |
6216 | #define elf64_bed elf64_x86_64_fbsd_bed | |
6217 | ||
6218 | #include "elf64-target.h" | |
8a9036a4 | 6219 | |
a6cc6b3b RO |
6220 | /* Solaris 2 support. */ |
6221 | ||
6222 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6223 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
6224 | #undef TARGET_LITTLE_NAME |
6225 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
6226 | ||
6227 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
6228 | objects won't be recognized. */ | |
6229 | #undef ELF_OSABI | |
6230 | ||
6231 | #undef elf64_bed | |
6232 | #define elf64_bed elf64_x86_64_sol2_bed | |
6233 | ||
7dc98aea RO |
6234 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
6235 | boundary. */ | |
6236 | #undef elf_backend_static_tls_alignment | |
6237 | #define elf_backend_static_tls_alignment 16 | |
6238 | ||
a6cc6b3b RO |
6239 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
6240 | ||
6241 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
6242 | File, p.63. */ | |
6243 | #undef elf_backend_want_plt_sym | |
6244 | #define elf_backend_want_plt_sym 1 | |
6245 | ||
6246 | #include "elf64-target.h" | |
6247 | ||
8059fb19 RM |
6248 | /* Native Client support. */ |
6249 | ||
64b384e1 RM |
6250 | static bfd_boolean |
6251 | elf64_x86_64_nacl_elf_object_p (bfd *abfd) | |
6252 | { | |
6253 | /* Set the right machine number for a NaCl x86-64 ELF64 file. */ | |
6254 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl); | |
6255 | return TRUE; | |
6256 | } | |
6257 | ||
8059fb19 | 6258 | #undef TARGET_LITTLE_SYM |
6d00b590 | 6259 | #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec |
8059fb19 RM |
6260 | #undef TARGET_LITTLE_NAME |
6261 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
6262 | #undef elf64_bed | |
6263 | #define elf64_bed elf64_x86_64_nacl_bed | |
6264 | ||
6265 | #undef ELF_MAXPAGESIZE | |
6266 | #undef ELF_MINPAGESIZE | |
6267 | #undef ELF_COMMONPAGESIZE | |
6268 | #define ELF_MAXPAGESIZE 0x10000 | |
6269 | #define ELF_MINPAGESIZE 0x10000 | |
6270 | #define ELF_COMMONPAGESIZE 0x10000 | |
6271 | ||
6272 | /* Restore defaults. */ | |
6273 | #undef ELF_OSABI | |
6274 | #undef elf_backend_static_tls_alignment | |
6275 | #undef elf_backend_want_plt_sym | |
6276 | #define elf_backend_want_plt_sym 0 | |
6277 | ||
6278 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
6279 | ||
6280 | #undef elf_backend_plt_alignment | |
6281 | #define elf_backend_plt_alignment 5 | |
6282 | #define NACL_PLT_ENTRY_SIZE 64 | |
6283 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
6284 | ||
6285 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
6286 | { | |
6287 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
6288 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ | |
6289 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
6290 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
6291 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
6292 | ||
ea2d813e | 6293 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
70cc877f | 6294 | 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */ |
ea2d813e RM |
6295 | |
6296 | /* 32 bytes of nop to pad out to the standard size. */ | |
8059fb19 RM |
6297 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ |
6298 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
6299 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
6300 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
ea2d813e RM |
6301 | 0x66, /* excess data32 prefix */ |
6302 | 0x90 /* nop */ | |
8059fb19 RM |
6303 | }; |
6304 | ||
6305 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6306 | { | |
6307 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
6308 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
6309 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
6310 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
6311 | ||
6312 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
6313 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
6314 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
6315 | ||
6316 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6317 | 0x68, /* pushq immediate */ | |
6318 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
6319 | 0xe9, /* jmp relative */ | |
6320 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
6321 | ||
6322 | /* 22 bytes of nop to pad out to the standard size. */ | |
6323 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
6324 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
6325 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ | |
6326 | }; | |
6327 | ||
6328 | /* .eh_frame covering the .plt section. */ | |
6329 | ||
6330 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
6331 | { | |
6332 | #if (PLT_CIE_LENGTH != 20 \ | |
6333 | || PLT_FDE_LENGTH != 36 \ | |
6334 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
6335 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
6336 | # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!" | |
6337 | #endif | |
6338 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
6339 | 0, 0, 0, 0, /* CIE ID */ | |
6340 | 1, /* CIE version */ | |
6341 | 'z', 'R', 0, /* Augmentation string */ | |
6342 | 1, /* Code alignment factor */ | |
6343 | 0x78, /* Data alignment factor */ | |
6344 | 16, /* Return address column */ | |
6345 | 1, /* Augmentation size */ | |
6346 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
6347 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
6348 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
6349 | DW_CFA_nop, DW_CFA_nop, | |
6350 | ||
6351 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
6352 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
6353 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
6354 | 0, 0, 0, 0, /* .plt size goes here */ | |
6355 | 0, /* Augmentation size */ | |
6356 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
6357 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
6358 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
6359 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
6360 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
6361 | 13, /* Block length */ | |
6362 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
6363 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
6364 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
6365 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
6366 | DW_CFA_nop, DW_CFA_nop | |
6367 | }; | |
6368 | ||
6369 | static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed = | |
6370 | { | |
6371 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ | |
6372 | elf_x86_64_nacl_plt_entry, /* plt_entry */ | |
6373 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
6374 | 2, /* plt0_got1_offset */ | |
6375 | 9, /* plt0_got2_offset */ | |
6376 | 13, /* plt0_got2_insn_end */ | |
6377 | 3, /* plt_got_offset */ | |
6378 | 33, /* plt_reloc_offset */ | |
6379 | 38, /* plt_plt_offset */ | |
6380 | 7, /* plt_got_insn_size */ | |
6381 | 42, /* plt_plt_insn_end */ | |
6382 | 32, /* plt_lazy_offset */ | |
6383 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ | |
6384 | sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */ | |
6385 | }; | |
6386 | ||
6387 | #undef elf_backend_arch_data | |
6388 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
6389 | ||
64b384e1 RM |
6390 | #undef elf_backend_object_p |
6391 | #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p | |
5a68afcf RM |
6392 | #undef elf_backend_modify_segment_map |
6393 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
6394 | #undef elf_backend_modify_program_headers | |
6395 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
6396 | #undef elf_backend_final_write_processing |
6397 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 6398 | |
8059fb19 RM |
6399 | #include "elf64-target.h" |
6400 | ||
6401 | /* Native Client x32 support. */ | |
6402 | ||
64b384e1 RM |
6403 | static bfd_boolean |
6404 | elf32_x86_64_nacl_elf_object_p (bfd *abfd) | |
6405 | { | |
6406 | /* Set the right machine number for a NaCl x86-64 ELF32 file. */ | |
6407 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl); | |
6408 | return TRUE; | |
6409 | } | |
6410 | ||
8059fb19 | 6411 | #undef TARGET_LITTLE_SYM |
6d00b590 | 6412 | #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec |
8059fb19 RM |
6413 | #undef TARGET_LITTLE_NAME |
6414 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" | |
6415 | #undef elf32_bed | |
6416 | #define elf32_bed elf32_x86_64_nacl_bed | |
6417 | ||
6418 | #define bfd_elf32_bfd_link_hash_table_create \ | |
6419 | elf_x86_64_link_hash_table_create | |
8059fb19 RM |
6420 | #define bfd_elf32_bfd_reloc_type_lookup \ |
6421 | elf_x86_64_reloc_type_lookup | |
6422 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
6423 | elf_x86_64_reloc_name_lookup | |
6424 | #define bfd_elf32_mkobject \ | |
6425 | elf_x86_64_mkobject | |
b7365e5d L |
6426 | #define bfd_elf32_get_synthetic_symtab \ |
6427 | elf_x86_64_get_synthetic_symtab | |
8059fb19 RM |
6428 | |
6429 | #undef elf_backend_object_p | |
6430 | #define elf_backend_object_p \ | |
64b384e1 | 6431 | elf32_x86_64_nacl_elf_object_p |
8059fb19 RM |
6432 | |
6433 | #undef elf_backend_bfd_from_remote_memory | |
6434 | #define elf_backend_bfd_from_remote_memory \ | |
6435 | _bfd_elf32_bfd_from_remote_memory | |
6436 | ||
6437 | #undef elf_backend_size_info | |
6438 | #define elf_backend_size_info \ | |
6439 | _bfd_elf32_size_info | |
6440 | ||
6441 | #include "elf32-target.h" | |
6442 | ||
6443 | /* Restore defaults. */ | |
5a68afcf | 6444 | #undef elf_backend_object_p |
8059fb19 | 6445 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
6446 | #undef elf_backend_bfd_from_remote_memory |
6447 | #undef elf_backend_size_info | |
6448 | #undef elf_backend_modify_segment_map | |
6449 | #undef elf_backend_modify_program_headers | |
887badb3 | 6450 | #undef elf_backend_final_write_processing |
8059fb19 | 6451 | |
8a9036a4 L |
6452 | /* Intel L1OM support. */ |
6453 | ||
6454 | static bfd_boolean | |
6455 | elf64_l1om_elf_object_p (bfd *abfd) | |
6456 | { | |
6457 | /* Set the right machine number for an L1OM elf64 file. */ | |
6458 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
6459 | return TRUE; | |
6460 | } | |
6461 | ||
6462 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6463 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
6464 | #undef TARGET_LITTLE_NAME |
6465 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
6466 | #undef ELF_ARCH | |
6467 | #define ELF_ARCH bfd_arch_l1om | |
6468 | ||
6469 | #undef ELF_MACHINE_CODE | |
6470 | #define ELF_MACHINE_CODE EM_L1OM | |
6471 | ||
6472 | #undef ELF_OSABI | |
6473 | ||
6474 | #undef elf64_bed | |
6475 | #define elf64_bed elf64_l1om_bed | |
6476 | ||
6477 | #undef elf_backend_object_p | |
6478 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
6479 | ||
8059fb19 RM |
6480 | /* Restore defaults. */ |
6481 | #undef ELF_MAXPAGESIZE | |
6482 | #undef ELF_MINPAGESIZE | |
6483 | #undef ELF_COMMONPAGESIZE | |
6484 | #define ELF_MAXPAGESIZE 0x200000 | |
6485 | #define ELF_MINPAGESIZE 0x1000 | |
6486 | #define ELF_COMMONPAGESIZE 0x1000 | |
6487 | #undef elf_backend_plt_alignment | |
6488 | #define elf_backend_plt_alignment 4 | |
6489 | #undef elf_backend_arch_data | |
6490 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 6491 | |
8a9036a4 L |
6492 | #include "elf64-target.h" |
6493 | ||
6494 | /* FreeBSD L1OM support. */ | |
6495 | ||
6496 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6497 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
6498 | #undef TARGET_LITTLE_NAME |
6499 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
6500 | ||
6501 | #undef ELF_OSABI | |
6502 | #define ELF_OSABI ELFOSABI_FREEBSD | |
6503 | ||
6504 | #undef elf64_bed | |
6505 | #define elf64_bed elf64_l1om_fbsd_bed | |
6506 | ||
8a9036a4 | 6507 | #include "elf64-target.h" |
351f65ca | 6508 | |
7a9068fe L |
6509 | /* Intel K1OM support. */ |
6510 | ||
6511 | static bfd_boolean | |
6512 | elf64_k1om_elf_object_p (bfd *abfd) | |
6513 | { | |
6514 | /* Set the right machine number for an K1OM elf64 file. */ | |
6515 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
6516 | return TRUE; | |
6517 | } | |
6518 | ||
6519 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6520 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
6521 | #undef TARGET_LITTLE_NAME |
6522 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
6523 | #undef ELF_ARCH | |
6524 | #define ELF_ARCH bfd_arch_k1om | |
6525 | ||
6526 | #undef ELF_MACHINE_CODE | |
6527 | #define ELF_MACHINE_CODE EM_K1OM | |
6528 | ||
6529 | #undef ELF_OSABI | |
6530 | ||
6531 | #undef elf64_bed | |
6532 | #define elf64_bed elf64_k1om_bed | |
6533 | ||
6534 | #undef elf_backend_object_p | |
6535 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
6536 | ||
6537 | #undef elf_backend_static_tls_alignment | |
6538 | ||
6539 | #undef elf_backend_want_plt_sym | |
6540 | #define elf_backend_want_plt_sym 0 | |
6541 | ||
6542 | #include "elf64-target.h" | |
6543 | ||
6544 | /* FreeBSD K1OM support. */ | |
6545 | ||
6546 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6547 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
6548 | #undef TARGET_LITTLE_NAME |
6549 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
6550 | ||
6551 | #undef ELF_OSABI | |
6552 | #define ELF_OSABI ELFOSABI_FREEBSD | |
6553 | ||
6554 | #undef elf64_bed | |
6555 | #define elf64_bed elf64_k1om_fbsd_bed | |
6556 | ||
6557 | #include "elf64-target.h" | |
6558 | ||
351f65ca L |
6559 | /* 32bit x86-64 support. */ |
6560 | ||
351f65ca | 6561 | #undef TARGET_LITTLE_SYM |
6d00b590 | 6562 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
6563 | #undef TARGET_LITTLE_NAME |
6564 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 6565 | #undef elf32_bed |
351f65ca L |
6566 | |
6567 | #undef ELF_ARCH | |
6568 | #define ELF_ARCH bfd_arch_i386 | |
6569 | ||
6570 | #undef ELF_MACHINE_CODE | |
6571 | #define ELF_MACHINE_CODE EM_X86_64 | |
6572 | ||
351f65ca L |
6573 | #undef ELF_OSABI |
6574 | ||
351f65ca L |
6575 | #undef elf_backend_object_p |
6576 | #define elf_backend_object_p \ | |
6577 | elf32_x86_64_elf_object_p | |
6578 | ||
6579 | #undef elf_backend_bfd_from_remote_memory | |
6580 | #define elf_backend_bfd_from_remote_memory \ | |
6581 | _bfd_elf32_bfd_from_remote_memory | |
6582 | ||
6583 | #undef elf_backend_size_info | |
6584 | #define elf_backend_size_info \ | |
6585 | _bfd_elf32_size_info | |
6586 | ||
6587 | #include "elf32-target.h" |