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351f65ca | 1 | /* X86-64 specific support for ELF |
4b95cf5c | 2 | Copyright (C) 2000-2014 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 | { | |
b34976b6 AM |
57 | HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
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 NC |
304 | } |
305 | return 0; | |
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 | |
0ff2b86e L |
760 | /* TRUE if symbol has at least one BND relocation. */ |
761 | bfd_boolean has_bnd_reloc; | |
762 | ||
763 | /* Information about the second PLT entry. Filled when has_bnd_reloc is | |
764 | set. */ | |
765 | union gotplt_union plt_bnd; | |
766 | ||
67a4f2b7 AO |
767 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, |
768 | starting at the end of the jump table. */ | |
769 | bfd_vma tlsdesc_got; | |
bffbf940 JJ |
770 | }; |
771 | ||
351f65ca L |
772 | #define elf_x86_64_hash_entry(ent) \ |
773 | ((struct elf_x86_64_link_hash_entry *)(ent)) | |
bffbf940 | 774 | |
351f65ca | 775 | struct elf_x86_64_obj_tdata |
bffbf940 JJ |
776 | { |
777 | struct elf_obj_tdata root; | |
778 | ||
779 | /* tls_type for each local got entry. */ | |
780 | char *local_got_tls_type; | |
67a4f2b7 AO |
781 | |
782 | /* GOTPLT entries for TLS descriptors. */ | |
783 | bfd_vma *local_tlsdesc_gotent; | |
70256ad8 AJ |
784 | }; |
785 | ||
351f65ca L |
786 | #define elf_x86_64_tdata(abfd) \ |
787 | ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any) | |
bffbf940 | 788 | |
351f65ca L |
789 | #define elf_x86_64_local_got_tls_type(abfd) \ |
790 | (elf_x86_64_tdata (abfd)->local_got_tls_type) | |
bffbf940 | 791 | |
351f65ca L |
792 | #define elf_x86_64_local_tlsdesc_gotent(abfd) \ |
793 | (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent) | |
bffbf940 | 794 | |
0ffa91dd NC |
795 | #define is_x86_64_elf(bfd) \ |
796 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
797 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 798 | && elf_object_id (bfd) == X86_64_ELF_DATA) |
0ffa91dd NC |
799 | |
800 | static bfd_boolean | |
351f65ca | 801 | elf_x86_64_mkobject (bfd *abfd) |
0ffa91dd | 802 | { |
351f65ca | 803 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata), |
4dfe6ac6 | 804 | X86_64_ELF_DATA); |
0ffa91dd NC |
805 | } |
806 | ||
c434dee6 | 807 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 808 | |
351f65ca | 809 | struct elf_x86_64_link_hash_table |
407443a3 | 810 | { |
c434dee6 | 811 | struct elf_link_hash_table elf; |
70256ad8 | 812 | |
c434dee6 | 813 | /* Short-cuts to get to dynamic linker sections. */ |
c434dee6 AJ |
814 | asection *sdynbss; |
815 | asection *srelbss; | |
e41b3a13 | 816 | asection *plt_eh_frame; |
0ff2b86e | 817 | asection *plt_bnd; |
70256ad8 | 818 | |
4dfe6ac6 NC |
819 | union |
820 | { | |
bffbf940 JJ |
821 | bfd_signed_vma refcount; |
822 | bfd_vma offset; | |
823 | } tls_ld_got; | |
824 | ||
67a4f2b7 AO |
825 | /* The amount of space used by the jump slots in the GOT. */ |
826 | bfd_vma sgotplt_jump_table_size; | |
827 | ||
87d72d41 AM |
828 | /* Small local sym cache. */ |
829 | struct sym_cache sym_cache; | |
9f03412a | 830 | |
351f65ca L |
831 | bfd_vma (*r_info) (bfd_vma, bfd_vma); |
832 | bfd_vma (*r_sym) (bfd_vma); | |
248775ba | 833 | unsigned int pointer_r_type; |
351f65ca L |
834 | const char *dynamic_interpreter; |
835 | int dynamic_interpreter_size; | |
836 | ||
9f03412a AO |
837 | /* _TLS_MODULE_BASE_ symbol. */ |
838 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
839 | |
840 | /* Used by local STT_GNU_IFUNC symbols. */ | |
841 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
842 | void * loc_hash_memory; |
843 | ||
844 | /* The offset into splt of the PLT entry for the TLS descriptor | |
845 | resolver. Special values are 0, if not necessary (or not found | |
846 | to be necessary yet), and -1 if needed but not determined | |
847 | yet. */ | |
848 | bfd_vma tlsdesc_plt; | |
849 | /* The offset into sgot of the GOT entry used by the PLT entry | |
850 | above. */ | |
851 | bfd_vma tlsdesc_got; | |
e1f98742 L |
852 | |
853 | /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */ | |
854 | bfd_vma next_jump_slot_index; | |
855 | /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */ | |
856 | bfd_vma next_irelative_index; | |
c434dee6 | 857 | }; |
70256ad8 AJ |
858 | |
859 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca | 860 | |
351f65ca | 861 | #define elf_x86_64_hash_table(p) \ |
4dfe6ac6 | 862 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
351f65ca | 863 | == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL) |
8d88c4ca | 864 | |
351f65ca | 865 | #define elf_x86_64_compute_jump_table_size(htab) \ |
6de2ae4a | 866 | ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE) |
67a4f2b7 | 867 | |
407443a3 | 868 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
869 | |
870 | static struct bfd_hash_entry * | |
351f65ca L |
871 | elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry, |
872 | struct bfd_hash_table *table, | |
873 | const char *string) | |
70256ad8 | 874 | { |
70256ad8 | 875 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
876 | subclass. */ |
877 | if (entry == NULL) | |
878 | { | |
a50b1753 | 879 | entry = (struct bfd_hash_entry *) |
eed180f8 RM |
880 | bfd_hash_allocate (table, |
881 | sizeof (struct elf_x86_64_link_hash_entry)); | |
c434dee6 AJ |
882 | if (entry == NULL) |
883 | return entry; | |
884 | } | |
70256ad8 AJ |
885 | |
886 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
887 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
888 | if (entry != NULL) | |
70256ad8 | 889 | { |
351f65ca | 890 | struct elf_x86_64_link_hash_entry *eh; |
c434dee6 | 891 | |
351f65ca | 892 | eh = (struct elf_x86_64_link_hash_entry *) entry; |
c434dee6 | 893 | eh->dyn_relocs = NULL; |
bffbf940 | 894 | eh->tls_type = GOT_UNKNOWN; |
0ff2b86e L |
895 | eh->has_bnd_reloc = FALSE; |
896 | eh->plt_bnd.offset = (bfd_vma) -1; | |
67a4f2b7 | 897 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
898 | } |
899 | ||
c434dee6 | 900 | return entry; |
70256ad8 AJ |
901 | } |
902 | ||
c25bc9fc L |
903 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
904 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
905 | as global symbol. We reuse indx and dynstr_index for local symbol | |
906 | hash since they aren't used by global symbols in this backend. */ | |
907 | ||
908 | static hashval_t | |
351f65ca | 909 | elf_x86_64_local_htab_hash (const void *ptr) |
c25bc9fc L |
910 | { |
911 | struct elf_link_hash_entry *h | |
912 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 913 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
914 | } |
915 | ||
916 | /* Compare local hash entries. */ | |
917 | ||
918 | static int | |
351f65ca | 919 | elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2) |
c25bc9fc L |
920 | { |
921 | struct elf_link_hash_entry *h1 | |
922 | = (struct elf_link_hash_entry *) ptr1; | |
923 | struct elf_link_hash_entry *h2 | |
924 | = (struct elf_link_hash_entry *) ptr2; | |
925 | ||
926 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
927 | } | |
928 | ||
929 | /* Find and/or create a hash entry for local symbol. */ | |
930 | ||
931 | static struct elf_link_hash_entry * | |
351f65ca L |
932 | elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab, |
933 | bfd *abfd, const Elf_Internal_Rela *rel, | |
934 | bfd_boolean create) | |
c25bc9fc | 935 | { |
351f65ca | 936 | struct elf_x86_64_link_hash_entry e, *ret; |
c25bc9fc | 937 | asection *sec = abfd->sections; |
d2149d72 | 938 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
351f65ca | 939 | htab->r_sym (rel->r_info)); |
c25bc9fc L |
940 | void **slot; |
941 | ||
942 | e.elf.indx = sec->id; | |
351f65ca | 943 | e.elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc L |
944 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, |
945 | create ? INSERT : NO_INSERT); | |
946 | ||
947 | if (!slot) | |
948 | return NULL; | |
949 | ||
950 | if (*slot) | |
951 | { | |
351f65ca | 952 | ret = (struct elf_x86_64_link_hash_entry *) *slot; |
c25bc9fc L |
953 | return &ret->elf; |
954 | } | |
955 | ||
351f65ca | 956 | ret = (struct elf_x86_64_link_hash_entry *) |
c25bc9fc | 957 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, |
351f65ca | 958 | sizeof (struct elf_x86_64_link_hash_entry)); |
c25bc9fc L |
959 | if (ret) |
960 | { | |
961 | memset (ret, 0, sizeof (*ret)); | |
962 | ret->elf.indx = sec->id; | |
351f65ca | 963 | ret->elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc | 964 | ret->elf.dynindx = -1; |
c25bc9fc L |
965 | *slot = ret; |
966 | } | |
967 | return &ret->elf; | |
968 | } | |
969 | ||
68faa637 AM |
970 | /* Destroy an X86-64 ELF linker hash table. */ |
971 | ||
972 | static void | |
d495ab0d | 973 | elf_x86_64_link_hash_table_free (bfd *obfd) |
68faa637 AM |
974 | { |
975 | struct elf_x86_64_link_hash_table *htab | |
d495ab0d | 976 | = (struct elf_x86_64_link_hash_table *) obfd->link.hash; |
68faa637 AM |
977 | |
978 | if (htab->loc_hash_table) | |
979 | htab_delete (htab->loc_hash_table); | |
980 | if (htab->loc_hash_memory) | |
981 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
d495ab0d | 982 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
983 | } |
984 | ||
8d88c4ca NC |
985 | /* Create an X86-64 ELF linker hash table. */ |
986 | ||
987 | static struct bfd_link_hash_table * | |
351f65ca | 988 | elf_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca | 989 | { |
351f65ca L |
990 | struct elf_x86_64_link_hash_table *ret; |
991 | bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table); | |
8d88c4ca | 992 | |
7bf52ea2 | 993 | ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt); |
c434dee6 | 994 | if (ret == NULL) |
8d88c4ca NC |
995 | return NULL; |
996 | ||
eb4ff4d6 | 997 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
351f65ca L |
998 | elf_x86_64_link_hash_newfunc, |
999 | sizeof (struct elf_x86_64_link_hash_entry), | |
4dfe6ac6 | 1000 | X86_64_ELF_DATA)) |
8d88c4ca | 1001 | { |
e2d34d7d | 1002 | free (ret); |
8d88c4ca NC |
1003 | return NULL; |
1004 | } | |
1005 | ||
351f65ca L |
1006 | if (ABI_64_P (abfd)) |
1007 | { | |
1008 | ret->r_info = elf64_r_info; | |
1009 | ret->r_sym = elf64_r_sym; | |
248775ba | 1010 | ret->pointer_r_type = R_X86_64_64; |
351f65ca L |
1011 | ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; |
1012 | ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; | |
1013 | } | |
1014 | else | |
1015 | { | |
1016 | ret->r_info = elf32_r_info; | |
1017 | ret->r_sym = elf32_r_sym; | |
248775ba | 1018 | ret->pointer_r_type = R_X86_64_32; |
351f65ca L |
1019 | ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; |
1020 | ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER; | |
1021 | } | |
1022 | ||
c25bc9fc | 1023 | ret->loc_hash_table = htab_try_create (1024, |
351f65ca L |
1024 | elf_x86_64_local_htab_hash, |
1025 | elf_x86_64_local_htab_eq, | |
c25bc9fc L |
1026 | NULL); |
1027 | ret->loc_hash_memory = objalloc_create (); | |
1028 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
1029 | { | |
d495ab0d | 1030 | elf_x86_64_link_hash_table_free (abfd); |
c25bc9fc L |
1031 | return NULL; |
1032 | } | |
d495ab0d | 1033 | ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free; |
c25bc9fc | 1034 | |
c434dee6 AJ |
1035 | return &ret->elf.root; |
1036 | } | |
1037 | ||
c434dee6 AJ |
1038 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
1039 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
1040 | hash table. */ | |
1041 | ||
b34976b6 | 1042 | static bfd_boolean |
351f65ca L |
1043 | elf_x86_64_create_dynamic_sections (bfd *dynobj, |
1044 | struct bfd_link_info *info) | |
c434dee6 | 1045 | { |
351f65ca | 1046 | struct elf_x86_64_link_hash_table *htab; |
c434dee6 | 1047 | |
c434dee6 | 1048 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 1049 | return FALSE; |
c434dee6 | 1050 | |
351f65ca | 1051 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1052 | if (htab == NULL) |
1053 | return FALSE; | |
1054 | ||
3d4d4302 | 1055 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
c434dee6 | 1056 | if (!info->shared) |
3d4d4302 | 1057 | htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); |
c434dee6 | 1058 | |
6de2ae4a | 1059 | if (!htab->sdynbss |
c434dee6 AJ |
1060 | || (!info->shared && !htab->srelbss)) |
1061 | abort (); | |
1062 | ||
e41b3a13 | 1063 | if (!info->no_ld_generated_unwind_info |
2fe0fd06 | 1064 | && htab->plt_eh_frame == NULL |
e4de50d4 | 1065 | && htab->elf.splt != NULL) |
e41b3a13 | 1066 | { |
bbf96e4e L |
1067 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
1068 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1069 | | SEC_LINKER_CREATED); | |
e41b3a13 | 1070 | htab->plt_eh_frame |
bbf96e4e | 1071 | = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags); |
e41b3a13 JJ |
1072 | if (htab->plt_eh_frame == NULL |
1073 | || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3)) | |
1074 | return FALSE; | |
e41b3a13 | 1075 | } |
b34976b6 | 1076 | return TRUE; |
c434dee6 AJ |
1077 | } |
1078 | ||
1079 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
1080 | ||
1081 | static void | |
351f65ca L |
1082 | elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
1083 | struct elf_link_hash_entry *dir, | |
1084 | struct elf_link_hash_entry *ind) | |
c434dee6 | 1085 | { |
351f65ca | 1086 | struct elf_x86_64_link_hash_entry *edir, *eind; |
c434dee6 | 1087 | |
351f65ca L |
1088 | edir = (struct elf_x86_64_link_hash_entry *) dir; |
1089 | eind = (struct elf_x86_64_link_hash_entry *) ind; | |
c434dee6 | 1090 | |
0ff2b86e L |
1091 | if (!edir->has_bnd_reloc) |
1092 | edir->has_bnd_reloc = eind->has_bnd_reloc; | |
1093 | ||
c434dee6 AJ |
1094 | if (eind->dyn_relocs != NULL) |
1095 | { | |
1096 | if (edir->dyn_relocs != NULL) | |
1097 | { | |
e03a8ed8 L |
1098 | struct elf_dyn_relocs **pp; |
1099 | struct elf_dyn_relocs *p; | |
c434dee6 | 1100 | |
fcfa13d2 | 1101 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
1102 | list. Merge any entries against the same section. */ |
1103 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1104 | { | |
e03a8ed8 | 1105 | struct elf_dyn_relocs *q; |
c434dee6 AJ |
1106 | |
1107 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1108 | if (q->sec == p->sec) | |
1109 | { | |
1110 | q->pc_count += p->pc_count; | |
1111 | q->count += p->count; | |
1112 | *pp = p->next; | |
1113 | break; | |
1114 | } | |
1115 | if (q == NULL) | |
1116 | pp = &p->next; | |
1117 | } | |
1118 | *pp = edir->dyn_relocs; | |
1119 | } | |
1120 | ||
1121 | edir->dyn_relocs = eind->dyn_relocs; | |
1122 | eind->dyn_relocs = NULL; | |
1123 | } | |
1124 | ||
bffbf940 JJ |
1125 | if (ind->root.type == bfd_link_hash_indirect |
1126 | && dir->got.refcount <= 0) | |
1127 | { | |
1128 | edir->tls_type = eind->tls_type; | |
1129 | eind->tls_type = GOT_UNKNOWN; | |
1130 | } | |
1131 | ||
d40d037c AJ |
1132 | if (ELIMINATE_COPY_RELOCS |
1133 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1134 | && dir->dynamic_adjusted) |
1135 | { | |
1136 | /* If called to transfer flags for a weakdef during processing | |
1137 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1138 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
1139 | dir->ref_dynamic |= ind->ref_dynamic; | |
1140 | dir->ref_regular |= ind->ref_regular; | |
1141 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1142 | dir->needs_plt |= ind->needs_plt; | |
1143 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1144 | } | |
d40d037c | 1145 | else |
fcfa13d2 | 1146 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
8d88c4ca NC |
1147 | } |
1148 | ||
b34976b6 | 1149 | static bfd_boolean |
27482721 | 1150 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 1151 | { |
8d88c4ca NC |
1152 | /* Set the right machine number for an x86-64 elf64 file. */ |
1153 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 1154 | return TRUE; |
8d88c4ca NC |
1155 | } |
1156 | ||
8059fb19 RM |
1157 | static bfd_boolean |
1158 | elf32_x86_64_elf_object_p (bfd *abfd) | |
1159 | { | |
1160 | /* Set the right machine number for an x86-64 elf32 file. */ | |
1161 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
1162 | return TRUE; | |
1163 | } | |
1164 | ||
142411ca L |
1165 | /* Return TRUE if the TLS access code sequence support transition |
1166 | from R_TYPE. */ | |
1167 | ||
1168 | static bfd_boolean | |
351f65ca L |
1169 | elf_x86_64_check_tls_transition (bfd *abfd, |
1170 | struct bfd_link_info *info, | |
1171 | asection *sec, | |
1172 | bfd_byte *contents, | |
1173 | Elf_Internal_Shdr *symtab_hdr, | |
1174 | struct elf_link_hash_entry **sym_hashes, | |
1175 | unsigned int r_type, | |
1176 | const Elf_Internal_Rela *rel, | |
1177 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1178 | { |
142411ca L |
1179 | unsigned int val; |
1180 | unsigned long r_symndx; | |
5c98a14e | 1181 | bfd_boolean largepic = FALSE; |
142411ca L |
1182 | struct elf_link_hash_entry *h; |
1183 | bfd_vma offset; | |
351f65ca | 1184 | struct elf_x86_64_link_hash_table *htab; |
142411ca L |
1185 | |
1186 | /* Get the section contents. */ | |
1187 | if (contents == NULL) | |
1188 | { | |
1189 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1190 | contents = elf_section_data (sec)->this_hdr.contents; | |
1191 | else | |
1192 | { | |
1193 | /* FIXME: How to better handle error condition? */ | |
1194 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1195 | return FALSE; | |
bffbf940 | 1196 | |
142411ca L |
1197 | /* Cache the section contents for elf_link_input_bfd. */ |
1198 | elf_section_data (sec)->this_hdr.contents = contents; | |
1199 | } | |
1200 | } | |
1201 | ||
351f65ca | 1202 | htab = elf_x86_64_hash_table (info); |
142411ca | 1203 | offset = rel->r_offset; |
bffbf940 | 1204 | switch (r_type) |
142411ca L |
1205 | { |
1206 | case R_X86_64_TLSGD: | |
1207 | case R_X86_64_TLSLD: | |
1208 | if ((rel + 1) >= relend) | |
1209 | return FALSE; | |
1210 | ||
1211 | if (r_type == R_X86_64_TLSGD) | |
1212 | { | |
52bc799a | 1213 | /* Check transition from GD access model. For 64bit, only |
142411ca L |
1214 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
1215 | .word 0x6666; rex64; call __tls_get_addr | |
52bc799a L |
1216 | can transit to different access model. For 32bit, only |
1217 | leaq foo@tlsgd(%rip), %rdi | |
1218 | .word 0x6666; rex64; call __tls_get_addr | |
5c98a14e JJ |
1219 | can transit to different access model. For largepic |
1220 | we also support: | |
1221 | leaq foo@tlsgd(%rip), %rdi | |
1222 | movabsq $__tls_get_addr@pltoff, %rax | |
1223 | addq $rbx, %rax | |
1224 | call *%rax. */ | |
142411ca | 1225 | |
fa289a5f AM |
1226 | static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 }; |
1227 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; | |
1228 | ||
5c98a14e | 1229 | if ((offset + 12) > sec->size) |
142411ca | 1230 | return FALSE; |
52bc799a | 1231 | |
5c98a14e JJ |
1232 | if (memcmp (contents + offset + 4, call, 4) != 0) |
1233 | { | |
1234 | if (!ABI_64_P (abfd) | |
1235 | || (offset + 19) > sec->size | |
1236 | || offset < 3 | |
1237 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0 | |
1238 | || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0 | |
1239 | || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5) | |
1240 | != 0) | |
1241 | return FALSE; | |
1242 | largepic = TRUE; | |
1243 | } | |
1244 | else if (ABI_64_P (abfd)) | |
52bc799a | 1245 | { |
52bc799a | 1246 | if (offset < 4 |
fa289a5f | 1247 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1248 | return FALSE; |
1249 | } | |
1250 | else | |
1251 | { | |
52bc799a | 1252 | if (offset < 3 |
fa289a5f | 1253 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1254 | return FALSE; |
1255 | } | |
142411ca L |
1256 | } |
1257 | else | |
1258 | { | |
1259 | /* Check transition from LD access model. Only | |
1260 | leaq foo@tlsld(%rip), %rdi; | |
1261 | call __tls_get_addr | |
5c98a14e JJ |
1262 | can transit to different access model. For largepic |
1263 | we also support: | |
1264 | leaq foo@tlsld(%rip), %rdi | |
1265 | movabsq $__tls_get_addr@pltoff, %rax | |
1266 | addq $rbx, %rax | |
1267 | call *%rax. */ | |
142411ca | 1268 | |
fa289a5f | 1269 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1270 | |
1271 | if (offset < 3 || (offset + 9) > sec->size) | |
1272 | return FALSE; | |
1273 | ||
5c98a14e | 1274 | if (memcmp (contents + offset - 3, lea, 3) != 0) |
142411ca | 1275 | return FALSE; |
5c98a14e JJ |
1276 | |
1277 | if (0xe8 != *(contents + offset + 4)) | |
1278 | { | |
1279 | if (!ABI_64_P (abfd) | |
1280 | || (offset + 19) > sec->size | |
1281 | || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0 | |
1282 | || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5) | |
1283 | != 0) | |
1284 | return FALSE; | |
1285 | largepic = TRUE; | |
1286 | } | |
142411ca L |
1287 | } |
1288 | ||
351f65ca | 1289 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1290 | if (r_symndx < symtab_hdr->sh_info) |
1291 | return FALSE; | |
1292 | ||
1293 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
c4fb387b | 1294 | /* Use strncmp to check __tls_get_addr since __tls_get_addr |
eed180f8 | 1295 | may be versioned. */ |
142411ca L |
1296 | return (h != NULL |
1297 | && h->root.root.string != NULL | |
5c98a14e JJ |
1298 | && (largepic |
1299 | ? ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64 | |
1300 | : (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32 | |
1301 | || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32)) | |
c4fb387b L |
1302 | && (strncmp (h->root.root.string, |
1303 | "__tls_get_addr", 14) == 0)); | |
142411ca L |
1304 | |
1305 | case R_X86_64_GOTTPOFF: | |
1306 | /* Check transition from IE access model: | |
4a4c5f25 L |
1307 | mov foo@gottpoff(%rip), %reg |
1308 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1309 | */ |
1310 | ||
4a4c5f25 L |
1311 | /* Check REX prefix first. */ |
1312 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1313 | { | |
1314 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1315 | if (val != 0x48 && val != 0x4c) | |
1316 | { | |
1317 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1318 | if (ABI_64_P (abfd)) | |
1319 | return FALSE; | |
1320 | } | |
1321 | } | |
1322 | else | |
1323 | { | |
1324 | /* X32 may not have any REX prefix. */ | |
1325 | if (ABI_64_P (abfd)) | |
1326 | return FALSE; | |
1327 | if (offset < 2 || (offset + 3) > sec->size) | |
1328 | return FALSE; | |
1329 | } | |
142411ca L |
1330 | |
1331 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1332 | if (val != 0x8b && val != 0x03) | |
1333 | return FALSE; | |
1334 | ||
1335 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1336 | return (val & 0xc7) == 5; | |
1337 | ||
1338 | case R_X86_64_GOTPC32_TLSDESC: | |
1339 | /* Check transition from GDesc access model: | |
1340 | leaq x@tlsdesc(%rip), %rax | |
1341 | ||
1342 | Make sure it's a leaq adding rip to a 32-bit offset | |
1343 | into any register, although it's probably almost always | |
1344 | going to be rax. */ | |
1345 | ||
1346 | if (offset < 3 || (offset + 4) > sec->size) | |
1347 | return FALSE; | |
1348 | ||
1349 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1350 | if ((val & 0xfb) != 0x48) | |
1351 | return FALSE; | |
1352 | ||
1353 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1354 | return FALSE; | |
1355 | ||
1356 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1357 | return (val & 0xc7) == 0x05; | |
1358 | ||
1359 | case R_X86_64_TLSDESC_CALL: | |
1360 | /* Check transition from GDesc access model: | |
1361 | call *x@tlsdesc(%rax) | |
1362 | */ | |
1363 | if (offset + 2 <= sec->size) | |
1364 | { | |
1365 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
fa289a5f AM |
1366 | static const unsigned char call[] = { 0xff, 0x10 }; |
1367 | return memcmp (contents + offset, call, 2) == 0; | |
142411ca L |
1368 | } |
1369 | ||
1370 | return FALSE; | |
1371 | ||
1372 | default: | |
1373 | abort (); | |
1374 | } | |
1375 | } | |
1376 | ||
1377 | /* Return TRUE if the TLS access transition is OK or no transition | |
1378 | will be performed. Update R_TYPE if there is a transition. */ | |
1379 | ||
1380 | static bfd_boolean | |
351f65ca L |
1381 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1382 | asection *sec, bfd_byte *contents, | |
1383 | Elf_Internal_Shdr *symtab_hdr, | |
1384 | struct elf_link_hash_entry **sym_hashes, | |
1385 | unsigned int *r_type, int tls_type, | |
1386 | const Elf_Internal_Rela *rel, | |
1387 | const Elf_Internal_Rela *relend, | |
1388 | struct elf_link_hash_entry *h, | |
1389 | unsigned long r_symndx) | |
142411ca L |
1390 | { |
1391 | unsigned int from_type = *r_type; | |
1392 | unsigned int to_type = from_type; | |
1393 | bfd_boolean check = TRUE; | |
1394 | ||
bb1cb422 L |
1395 | /* Skip TLS transition for functions. */ |
1396 | if (h != NULL | |
1397 | && (h->type == STT_FUNC | |
1398 | || h->type == STT_GNU_IFUNC)) | |
1399 | return TRUE; | |
1400 | ||
142411ca | 1401 | switch (from_type) |
bffbf940 JJ |
1402 | { |
1403 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1404 | case R_X86_64_GOTPC32_TLSDESC: |
1405 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1406 | case R_X86_64_GOTTPOFF: |
1d85728f | 1407 | if (info->executable) |
142411ca L |
1408 | { |
1409 | if (h == NULL) | |
1410 | to_type = R_X86_64_TPOFF32; | |
1411 | else | |
1412 | to_type = R_X86_64_GOTTPOFF; | |
1413 | } | |
1414 | ||
351f65ca | 1415 | /* When we are called from elf_x86_64_relocate_section, |
142411ca L |
1416 | CONTENTS isn't NULL and there may be additional transitions |
1417 | based on TLS_TYPE. */ | |
1418 | if (contents != NULL) | |
1419 | { | |
1420 | unsigned int new_to_type = to_type; | |
1421 | ||
1d85728f | 1422 | if (info->executable |
142411ca L |
1423 | && h != NULL |
1424 | && h->dynindx == -1 | |
1425 | && tls_type == GOT_TLS_IE) | |
1426 | new_to_type = R_X86_64_TPOFF32; | |
1427 | ||
1428 | if (to_type == R_X86_64_TLSGD | |
1429 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1430 | || to_type == R_X86_64_TLSDESC_CALL) | |
1431 | { | |
1432 | if (tls_type == GOT_TLS_IE) | |
1433 | new_to_type = R_X86_64_GOTTPOFF; | |
1434 | } | |
1435 | ||
1436 | /* We checked the transition before when we were called from | |
351f65ca | 1437 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1438 | transition which hasn't been checked before. */ |
1439 | check = new_to_type != to_type && from_type == to_type; | |
1440 | to_type = new_to_type; | |
1441 | } | |
1442 | ||
1443 | break; | |
1444 | ||
bffbf940 | 1445 | case R_X86_64_TLSLD: |
1d85728f | 1446 | if (info->executable) |
142411ca L |
1447 | to_type = R_X86_64_TPOFF32; |
1448 | break; | |
1449 | ||
1450 | default: | |
1451 | return TRUE; | |
bffbf940 JJ |
1452 | } |
1453 | ||
142411ca L |
1454 | /* Return TRUE if there is no transition. */ |
1455 | if (from_type == to_type) | |
1456 | return TRUE; | |
1457 | ||
1458 | /* Check if the transition can be performed. */ | |
1459 | if (check | |
351f65ca L |
1460 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1461 | symtab_hdr, sym_hashes, | |
1462 | from_type, rel, relend)) | |
142411ca | 1463 | { |
2f629d23 | 1464 | reloc_howto_type *from, *to; |
4c544807 | 1465 | const char *name; |
142411ca | 1466 | |
351f65ca L |
1467 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1468 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1469 | |
4c544807 L |
1470 | if (h) |
1471 | name = h->root.root.string; | |
1472 | else | |
1473 | { | |
351f65ca | 1474 | struct elf_x86_64_link_hash_table *htab; |
4dfe6ac6 | 1475 | |
351f65ca | 1476 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1477 | if (htab == NULL) |
1478 | name = "*unknown*"; | |
1479 | else | |
1480 | { | |
1481 | Elf_Internal_Sym *isym; | |
1482 | ||
1483 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1484 | abfd, r_symndx); | |
1485 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1486 | } | |
4c544807 L |
1487 | } |
1488 | ||
142411ca L |
1489 | (*_bfd_error_handler) |
1490 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1491 | "in section `%A' failed"), | |
4c544807 | 1492 | abfd, sec, from->name, to->name, name, |
142411ca L |
1493 | (unsigned long) rel->r_offset); |
1494 | bfd_set_error (bfd_error_bad_value); | |
1495 | return FALSE; | |
1496 | } | |
1497 | ||
1498 | *r_type = to_type; | |
1499 | return TRUE; | |
bffbf940 JJ |
1500 | } |
1501 | ||
70256ad8 | 1502 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1503 | calculate needed space in the global offset table, procedure |
1504 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1505 | |
b34976b6 | 1506 | static bfd_boolean |
351f65ca L |
1507 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1508 | asection *sec, | |
1509 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1510 | { |
351f65ca | 1511 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1512 | Elf_Internal_Shdr *symtab_hdr; |
1513 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1514 | const Elf_Internal_Rela *rel; |
1515 | const Elf_Internal_Rela *rel_end; | |
70256ad8 AJ |
1516 | asection *sreloc; |
1517 | ||
1049f94e | 1518 | if (info->relocatable) |
b34976b6 | 1519 | return TRUE; |
70256ad8 | 1520 | |
0ffa91dd NC |
1521 | BFD_ASSERT (is_x86_64_elf (abfd)); |
1522 | ||
351f65ca | 1523 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1524 | if (htab == NULL) |
1525 | return FALSE; | |
1526 | ||
0ffa91dd | 1527 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1528 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1529 | |
c434dee6 | 1530 | sreloc = NULL; |
cbe950e9 | 1531 | |
70256ad8 AJ |
1532 | rel_end = relocs + sec->reloc_count; |
1533 | for (rel = relocs; rel < rel_end; rel++) | |
1534 | { | |
bffbf940 | 1535 | unsigned int r_type; |
70256ad8 AJ |
1536 | unsigned long r_symndx; |
1537 | struct elf_link_hash_entry *h; | |
4c544807 L |
1538 | Elf_Internal_Sym *isym; |
1539 | const char *name; | |
06a6a421 | 1540 | bfd_boolean size_reloc; |
70256ad8 | 1541 | |
351f65ca L |
1542 | r_symndx = htab->r_sym (rel->r_info); |
1543 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1544 | |
1545 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1546 | { | |
d003868e AM |
1547 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1548 | abfd, r_symndx); | |
b34976b6 | 1549 | return FALSE; |
c434dee6 AJ |
1550 | } |
1551 | ||
70256ad8 | 1552 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1553 | { |
1554 | /* A local symbol. */ | |
c2e61a4e L |
1555 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1556 | abfd, r_symndx); | |
1557 | if (isym == NULL) | |
1558 | return FALSE; | |
c25bc9fc L |
1559 | |
1560 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1561 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1562 | { |
351f65ca L |
1563 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, |
1564 | TRUE); | |
c25bc9fc | 1565 | if (h == NULL) |
c2e61a4e | 1566 | return FALSE; |
6bbec505 | 1567 | |
c25bc9fc L |
1568 | /* Fake a STT_GNU_IFUNC symbol. */ |
1569 | h->type = STT_GNU_IFUNC; | |
1570 | h->def_regular = 1; | |
1571 | h->ref_regular = 1; | |
1572 | h->forced_local = 1; | |
1573 | h->root.type = bfd_link_hash_defined; | |
1574 | } | |
1575 | else | |
1576 | h = NULL; | |
1577 | } | |
70256ad8 | 1578 | else |
71cb9464 | 1579 | { |
4c544807 | 1580 | isym = NULL; |
71cb9464 L |
1581 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1582 | while (h->root.type == bfd_link_hash_indirect | |
1583 | || h->root.type == bfd_link_hash_warning) | |
1584 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1585 | } |
cbe950e9 | 1586 | |
d1534d16 L |
1587 | /* Check invalid x32 relocations. */ |
1588 | if (!ABI_64_P (abfd)) | |
1589 | switch (r_type) | |
1590 | { | |
1591 | default: | |
1592 | break; | |
1593 | ||
d1534d16 L |
1594 | case R_X86_64_DTPOFF64: |
1595 | case R_X86_64_TPOFF64: | |
1596 | case R_X86_64_PC64: | |
1597 | case R_X86_64_GOTOFF64: | |
1598 | case R_X86_64_GOT64: | |
1599 | case R_X86_64_GOTPCREL64: | |
1600 | case R_X86_64_GOTPC64: | |
1601 | case R_X86_64_GOTPLT64: | |
1602 | case R_X86_64_PLTOFF64: | |
1603 | { | |
1604 | if (h) | |
1605 | name = h->root.root.string; | |
1606 | else | |
1607 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1608 | NULL); | |
1609 | (*_bfd_error_handler) | |
1610 | (_("%B: relocation %s against symbol `%s' isn't " | |
1611 | "supported in x32 mode"), abfd, | |
1612 | x86_64_elf_howto_table[r_type].name, name); | |
1613 | bfd_set_error (bfd_error_bad_value); | |
1614 | return FALSE; | |
1615 | } | |
1616 | break; | |
1617 | } | |
1618 | ||
c25bc9fc L |
1619 | if (h != NULL) |
1620 | { | |
cbe950e9 L |
1621 | /* Create the ifunc sections for static executables. If we |
1622 | never see an indirect function symbol nor we are building | |
1623 | a static executable, those sections will be empty and | |
1624 | won't appear in output. */ | |
1625 | switch (r_type) | |
1626 | { | |
1627 | default: | |
1628 | break; | |
1629 | ||
0ff2b86e L |
1630 | case R_X86_64_PC32_BND: |
1631 | case R_X86_64_PLT32_BND: | |
1632 | /* MPX PLT is supported only if elf_x86_64_arch_bed | |
1633 | is used in 64-bit mode. */ | |
1634 | if (ABI_64_P (abfd) | |
1635 | && (get_elf_x86_64_backend_data (abfd) | |
1636 | == &elf_x86_64_arch_bed)) | |
1637 | { | |
1638 | elf_x86_64_hash_entry (h)->has_bnd_reloc = TRUE; | |
1639 | ||
1640 | /* Create the second PLT for Intel MPX support. */ | |
1641 | if (htab->plt_bnd == NULL) | |
1642 | { | |
1643 | unsigned int plt_bnd_align; | |
1644 | const struct elf_backend_data *bed; | |
1645 | ||
1646 | bed = get_elf_backend_data (info->output_bfd); | |
1647 | switch (sizeof (elf_x86_64_bnd_plt2_entry)) | |
1648 | { | |
1649 | case 8: | |
1650 | plt_bnd_align = 3; | |
1651 | break; | |
1652 | case 16: | |
1653 | plt_bnd_align = 4; | |
1654 | break; | |
1655 | default: | |
1656 | abort (); | |
1657 | } | |
1658 | ||
1659 | if (htab->elf.dynobj == NULL) | |
1660 | htab->elf.dynobj = abfd; | |
1661 | htab->plt_bnd | |
1662 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
1663 | ".plt.bnd", | |
1664 | (bed->dynamic_sec_flags | |
1665 | | SEC_ALLOC | |
1666 | | SEC_CODE | |
1667 | | SEC_LOAD | |
1668 | | SEC_READONLY)); | |
1669 | if (htab->plt_bnd == NULL | |
1670 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
1671 | htab->plt_bnd, | |
1672 | plt_bnd_align)) | |
1673 | return FALSE; | |
1674 | } | |
1675 | } | |
1676 | ||
cbe950e9 L |
1677 | case R_X86_64_32S: |
1678 | case R_X86_64_32: | |
1679 | case R_X86_64_64: | |
1680 | case R_X86_64_PC32: | |
1681 | case R_X86_64_PC64: | |
1682 | case R_X86_64_PLT32: | |
1683 | case R_X86_64_GOTPCREL: | |
1684 | case R_X86_64_GOTPCREL64: | |
9d4057ee AM |
1685 | if (htab->elf.dynobj == NULL) |
1686 | htab->elf.dynobj = abfd; | |
1687 | if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) | |
c2e61a4e | 1688 | return FALSE; |
cbe950e9 L |
1689 | break; |
1690 | } | |
1691 | ||
ad1e85de L |
1692 | /* It is referenced by a non-shared object. */ |
1693 | h->ref_regular = 1; | |
61315175 | 1694 | h->root.non_ir_ref = 1; |
71cb9464 | 1695 | } |
70256ad8 | 1696 | |
351f65ca L |
1697 | if (! elf_x86_64_tls_transition (info, abfd, sec, NULL, |
1698 | symtab_hdr, sym_hashes, | |
1699 | &r_type, GOT_UNKNOWN, | |
1700 | rel, rel_end, h, r_symndx)) | |
c2e61a4e | 1701 | return FALSE; |
142411ca | 1702 | |
bffbf940 | 1703 | switch (r_type) |
70256ad8 | 1704 | { |
bffbf940 JJ |
1705 | case R_X86_64_TLSLD: |
1706 | htab->tls_ld_got.refcount += 1; | |
1707 | goto create_got; | |
1708 | ||
1709 | case R_X86_64_TPOFF32: | |
351f65ca | 1710 | if (!info->executable && ABI_64_P (abfd)) |
70256ad8 | 1711 | { |
09a24cbf | 1712 | if (h) |
4c544807 L |
1713 | name = h->root.root.string; |
1714 | else | |
1715 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1716 | NULL); | |
bffbf940 | 1717 | (*_bfd_error_handler) |
d003868e AM |
1718 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
1719 | abfd, | |
4c544807 | 1720 | x86_64_elf_howto_table[r_type].name, name); |
bffbf940 | 1721 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1722 | return FALSE; |
70256ad8 | 1723 | } |
bffbf940 | 1724 | break; |
c434dee6 | 1725 | |
bffbf940 | 1726 | case R_X86_64_GOTTPOFF: |
1d85728f | 1727 | if (!info->executable) |
bffbf940 JJ |
1728 | info->flags |= DF_STATIC_TLS; |
1729 | /* Fall through */ | |
70256ad8 | 1730 | |
bffbf940 JJ |
1731 | case R_X86_64_GOT32: |
1732 | case R_X86_64_GOTPCREL: | |
1733 | case R_X86_64_TLSGD: | |
7b81dfbb AJ |
1734 | case R_X86_64_GOT64: |
1735 | case R_X86_64_GOTPCREL64: | |
1736 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
1737 | case R_X86_64_GOTPC32_TLSDESC: |
1738 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
1739 | /* This symbol requires a global offset table entry. */ |
1740 | { | |
1741 | int tls_type, old_tls_type; | |
1742 | ||
1743 | switch (r_type) | |
1744 | { | |
1745 | default: tls_type = GOT_NORMAL; break; | |
1746 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
1747 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
1748 | case R_X86_64_GOTPC32_TLSDESC: |
1749 | case R_X86_64_TLSDESC_CALL: | |
1750 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
1751 | } |
1752 | ||
1753 | if (h != NULL) | |
1754 | { | |
1755 | h->got.refcount += 1; | |
351f65ca | 1756 | old_tls_type = elf_x86_64_hash_entry (h)->tls_type; |
bffbf940 JJ |
1757 | } |
1758 | else | |
1759 | { | |
1760 | bfd_signed_vma *local_got_refcounts; | |
1761 | ||
1762 | /* This is a global offset table entry for a local symbol. */ | |
1763 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1764 | if (local_got_refcounts == NULL) | |
1765 | { | |
1766 | bfd_size_type size; | |
1767 | ||
1768 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1769 | size *= sizeof (bfd_signed_vma) |
1770 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
1771 | local_got_refcounts = ((bfd_signed_vma *) |
1772 | bfd_zalloc (abfd, size)); | |
1773 | if (local_got_refcounts == NULL) | |
c2e61a4e | 1774 | return FALSE; |
bffbf940 | 1775 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
351f65ca | 1776 | elf_x86_64_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 1777 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
351f65ca | 1778 | elf_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 1779 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
1780 | } |
1781 | local_got_refcounts[r_symndx] += 1; | |
1782 | old_tls_type | |
351f65ca | 1783 | = elf_x86_64_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
1784 | } |
1785 | ||
1786 | /* If a TLS symbol is accessed using IE at least once, | |
1787 | there is no point to use dynamic model for it. */ | |
1788 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
1789 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
1790 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 1791 | { |
67a4f2b7 | 1792 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 1793 | tls_type = old_tls_type; |
67a4f2b7 AO |
1794 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1795 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1796 | tls_type |= old_tls_type; | |
bffbf940 JJ |
1797 | else |
1798 | { | |
09a24cbf | 1799 | if (h) |
4c544807 L |
1800 | name = h->root.root.string; |
1801 | else | |
1802 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
1803 | isym, NULL); | |
bffbf940 | 1804 | (*_bfd_error_handler) |
1f7a4e42 | 1805 | (_("%B: '%s' accessed both as normal and thread local symbol"), |
4c544807 | 1806 | abfd, name); |
68c4a57e | 1807 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1808 | return FALSE; |
bffbf940 JJ |
1809 | } |
1810 | } | |
1811 | ||
1812 | if (old_tls_type != tls_type) | |
1813 | { | |
1814 | if (h != NULL) | |
351f65ca | 1815 | elf_x86_64_hash_entry (h)->tls_type = tls_type; |
bffbf940 | 1816 | else |
351f65ca | 1817 | elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
1818 | } |
1819 | } | |
c434dee6 AJ |
1820 | /* Fall through */ |
1821 | ||
d6ab8113 JB |
1822 | case R_X86_64_GOTOFF64: |
1823 | case R_X86_64_GOTPC32: | |
7b81dfbb | 1824 | case R_X86_64_GOTPC64: |
bffbf940 | 1825 | create_got: |
6de2ae4a | 1826 | if (htab->elf.sgot == NULL) |
c434dee6 AJ |
1827 | { |
1828 | if (htab->elf.dynobj == NULL) | |
1829 | htab->elf.dynobj = abfd; | |
6de2ae4a L |
1830 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, |
1831 | info)) | |
c2e61a4e | 1832 | return FALSE; |
c434dee6 | 1833 | } |
70256ad8 AJ |
1834 | break; |
1835 | ||
1836 | case R_X86_64_PLT32: | |
c3320543 | 1837 | case R_X86_64_PLT32_BND: |
70256ad8 | 1838 | /* This symbol requires a procedure linkage table entry. We |
407443a3 AJ |
1839 | actually build the entry in adjust_dynamic_symbol, |
1840 | because this might be a case of linking PIC code which is | |
1841 | never referenced by a dynamic object, in which case we | |
1842 | don't need to generate a procedure linkage table entry | |
1843 | after all. */ | |
70256ad8 AJ |
1844 | |
1845 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 1846 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
1847 | if (h == NULL) |
1848 | continue; | |
1849 | ||
f5385ebf | 1850 | h->needs_plt = 1; |
51b64d56 | 1851 | h->plt.refcount += 1; |
70256ad8 AJ |
1852 | break; |
1853 | ||
7b81dfbb AJ |
1854 | case R_X86_64_PLTOFF64: |
1855 | /* This tries to form the 'address' of a function relative | |
1856 | to GOT. For global symbols we need a PLT entry. */ | |
1857 | if (h != NULL) | |
1858 | { | |
1859 | h->needs_plt = 1; | |
1860 | h->plt.refcount += 1; | |
1861 | } | |
1862 | goto create_got; | |
1863 | ||
6a3e1bae L |
1864 | case R_X86_64_SIZE32: |
1865 | case R_X86_64_SIZE64: | |
06a6a421 | 1866 | size_reloc = TRUE; |
6a3e1bae L |
1867 | goto do_size; |
1868 | ||
248775ba L |
1869 | case R_X86_64_32: |
1870 | if (!ABI_64_P (abfd)) | |
1871 | goto pointer; | |
cc78d0af AJ |
1872 | case R_X86_64_8: |
1873 | case R_X86_64_16: | |
70256ad8 | 1874 | case R_X86_64_32S: |
1b71fb54 AJ |
1875 | /* Let's help debug shared library creation. These relocs |
1876 | cannot be used in shared libs. Don't error out for | |
1877 | sections we don't care about, such as debug sections or | |
1878 | non-constant sections. */ | |
1879 | if (info->shared | |
1880 | && (sec->flags & SEC_ALLOC) != 0 | |
1881 | && (sec->flags & SEC_READONLY) != 0) | |
1882 | { | |
09a24cbf | 1883 | if (h) |
4c544807 L |
1884 | name = h->root.root.string; |
1885 | else | |
1886 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1b71fb54 | 1887 | (*_bfd_error_handler) |
d003868e | 1888 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
4c544807 | 1889 | abfd, x86_64_elf_howto_table[r_type].name, name); |
1b71fb54 | 1890 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1891 | return FALSE; |
1b71fb54 AJ |
1892 | } |
1893 | /* Fall through. */ | |
1894 | ||
c434dee6 AJ |
1895 | case R_X86_64_PC8: |
1896 | case R_X86_64_PC16: | |
70256ad8 | 1897 | case R_X86_64_PC32: |
c3320543 | 1898 | case R_X86_64_PC32_BND: |
d6ab8113 | 1899 | case R_X86_64_PC64: |
1b71fb54 | 1900 | case R_X86_64_64: |
248775ba | 1901 | pointer: |
710ab287 | 1902 | if (h != NULL && info->executable) |
c434dee6 AJ |
1903 | { |
1904 | /* If this reloc is in a read-only section, we might | |
1905 | need a copy reloc. We can't check reliably at this | |
1906 | stage whether the section is read-only, as input | |
1907 | sections have not yet been mapped to output sections. | |
1908 | Tentatively set the flag for now, and correct in | |
1909 | adjust_dynamic_symbol. */ | |
f5385ebf | 1910 | h->non_got_ref = 1; |
c434dee6 AJ |
1911 | |
1912 | /* We may need a .plt entry if the function this reloc | |
1913 | refers to is in a shared lib. */ | |
1914 | h->plt.refcount += 1; | |
c3320543 L |
1915 | if (r_type != R_X86_64_PC32 |
1916 | && r_type != R_X86_64_PC32_BND | |
1917 | && r_type != R_X86_64_PC64) | |
f5385ebf | 1918 | h->pointer_equality_needed = 1; |
c434dee6 | 1919 | } |
70256ad8 | 1920 | |
06a6a421 | 1921 | size_reloc = FALSE; |
6a3e1bae | 1922 | do_size: |
70256ad8 AJ |
1923 | /* If we are creating a shared library, and this is a reloc |
1924 | against a global symbol, or a non PC relative reloc | |
1925 | against a local symbol, then we need to copy the reloc | |
1926 | into the shared library. However, if we are linking with | |
1927 | -Bsymbolic, we do not need to copy a reloc against a | |
1928 | global symbol which is defined in an object we are | |
407443a3 | 1929 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
1930 | this point we have not seen all the input files, so it is |
1931 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
1932 | later (it is never cleared). In case of a weak definition, |
1933 | DEF_REGULAR may be cleared later by a strong definition in | |
1934 | a shared library. We account for that possibility below by | |
1935 | storing information in the relocs_copied field of the hash | |
1936 | table entry. A similar situation occurs when creating | |
1937 | shared libraries and symbol visibility changes render the | |
1938 | symbol local. | |
1939 | ||
1940 | If on the other hand, we are creating an executable, we | |
1941 | may need to keep relocations for symbols satisfied by a | |
1942 | dynamic library if we manage to avoid copy relocs for the | |
0f88be7a | 1943 | symbol. */ |
c434dee6 AJ |
1944 | if ((info->shared |
1945 | && (sec->flags & SEC_ALLOC) != 0 | |
d8045f23 | 1946 | && (! IS_X86_64_PCREL_TYPE (r_type) |
c434dee6 | 1947 | || (h != NULL |
55255dae | 1948 | && (! SYMBOLIC_BIND (info, h) |
c434dee6 | 1949 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1950 | || !h->def_regular)))) |
d40d037c AJ |
1951 | || (ELIMINATE_COPY_RELOCS |
1952 | && !info->shared | |
c434dee6 AJ |
1953 | && (sec->flags & SEC_ALLOC) != 0 |
1954 | && h != NULL | |
1955 | && (h->root.type == bfd_link_hash_defweak | |
0f88be7a | 1956 | || !h->def_regular))) |
70256ad8 | 1957 | { |
e03a8ed8 L |
1958 | struct elf_dyn_relocs *p; |
1959 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
1960 | |
1961 | /* We must copy these reloc types into the output file. | |
1962 | Create a reloc section in dynobj and make room for | |
1963 | this reloc. */ | |
70256ad8 AJ |
1964 | if (sreloc == NULL) |
1965 | { | |
c434dee6 AJ |
1966 | if (htab->elf.dynobj == NULL) |
1967 | htab->elf.dynobj = abfd; | |
1968 | ||
83bac4b0 | 1969 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
1970 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
1971 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 1972 | |
70256ad8 | 1973 | if (sreloc == NULL) |
c2e61a4e | 1974 | return FALSE; |
70256ad8 AJ |
1975 | } |
1976 | ||
c434dee6 AJ |
1977 | /* If this is a global symbol, we count the number of |
1978 | relocations we need for this symbol. */ | |
1979 | if (h != NULL) | |
70256ad8 | 1980 | { |
351f65ca | 1981 | head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs; |
c434dee6 AJ |
1982 | } |
1983 | else | |
1984 | { | |
1985 | /* Track dynamic relocs needed for local syms too. | |
1986 | We really need local syms available to do this | |
1987 | easily. Oh well. */ | |
c434dee6 | 1988 | asection *s; |
87d72d41 | 1989 | void **vpp; |
87d72d41 AM |
1990 | |
1991 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1992 | abfd, r_symndx); | |
1993 | if (isym == NULL) | |
1994 | return FALSE; | |
1995 | ||
1996 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 1997 | if (s == NULL) |
87d72d41 | 1998 | s = sec; |
70256ad8 | 1999 | |
e81d3500 DD |
2000 | /* Beware of type punned pointers vs strict aliasing |
2001 | rules. */ | |
2002 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 2003 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 2004 | } |
70256ad8 | 2005 | |
c434dee6 AJ |
2006 | p = *head; |
2007 | if (p == NULL || p->sec != sec) | |
2008 | { | |
2009 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 2010 | |
e03a8ed8 | 2011 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 2012 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 2013 | if (p == NULL) |
c2e61a4e | 2014 | return FALSE; |
c434dee6 AJ |
2015 | p->next = *head; |
2016 | *head = p; | |
2017 | p->sec = sec; | |
2018 | p->count = 0; | |
2019 | p->pc_count = 0; | |
70256ad8 | 2020 | } |
c434dee6 AJ |
2021 | |
2022 | p->count += 1; | |
06a6a421 L |
2023 | /* Count size relocation as PC-relative relocation. */ |
2024 | if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc) | |
c434dee6 | 2025 | p->pc_count += 1; |
70256ad8 AJ |
2026 | } |
2027 | break; | |
fe4770f4 AJ |
2028 | |
2029 | /* This relocation describes the C++ object vtable hierarchy. | |
2030 | Reconstruct it for later use during GC. */ | |
2031 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 2032 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c2e61a4e | 2033 | return FALSE; |
fe4770f4 AJ |
2034 | break; |
2035 | ||
2036 | /* This relocation describes which C++ vtable entries are actually | |
2037 | used. Record for later use during GC. */ | |
2038 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
2039 | BFD_ASSERT (h != NULL); |
2040 | if (h != NULL | |
2041 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
c2e61a4e | 2042 | return FALSE; |
fe4770f4 | 2043 | break; |
c434dee6 AJ |
2044 | |
2045 | default: | |
2046 | break; | |
70256ad8 AJ |
2047 | } |
2048 | } | |
2049 | ||
b34976b6 | 2050 | return TRUE; |
70256ad8 AJ |
2051 | } |
2052 | ||
2053 | /* Return the section that should be marked against GC for a given | |
407443a3 | 2054 | relocation. */ |
70256ad8 AJ |
2055 | |
2056 | static asection * | |
351f65ca L |
2057 | elf_x86_64_gc_mark_hook (asection *sec, |
2058 | struct bfd_link_info *info, | |
2059 | Elf_Internal_Rela *rel, | |
2060 | struct elf_link_hash_entry *h, | |
2061 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
2062 | { |
2063 | if (h != NULL) | |
351f65ca | 2064 | switch (ELF32_R_TYPE (rel->r_info)) |
07adf181 AM |
2065 | { |
2066 | case R_X86_64_GNU_VTINHERIT: | |
2067 | case R_X86_64_GNU_VTENTRY: | |
2068 | return NULL; | |
2069 | } | |
2070 | ||
2071 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
2072 | } |
2073 | ||
407443a3 | 2074 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 | 2075 | |
b34976b6 | 2076 | static bfd_boolean |
351f65ca L |
2077 | elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, |
2078 | asection *sec, | |
2079 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 2080 | { |
351f65ca | 2081 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2082 | Elf_Internal_Shdr *symtab_hdr; |
2083 | struct elf_link_hash_entry **sym_hashes; | |
2084 | bfd_signed_vma *local_got_refcounts; | |
2085 | const Elf_Internal_Rela *rel, *relend; | |
c434dee6 | 2086 | |
7dda2462 TG |
2087 | if (info->relocatable) |
2088 | return TRUE; | |
2089 | ||
351f65ca | 2090 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2091 | if (htab == NULL) |
2092 | return FALSE; | |
2093 | ||
c434dee6 | 2094 | elf_section_data (sec)->local_dynrel = NULL; |
70256ad8 | 2095 | |
0ffa91dd | 2096 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 AJ |
2097 | sym_hashes = elf_sym_hashes (abfd); |
2098 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2099 | ||
351f65ca | 2100 | htab = elf_x86_64_hash_table (info); |
70256ad8 AJ |
2101 | relend = relocs + sec->reloc_count; |
2102 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
2103 | { |
2104 | unsigned long r_symndx; | |
2105 | unsigned int r_type; | |
2106 | struct elf_link_hash_entry *h = NULL; | |
70256ad8 | 2107 | |
351f65ca | 2108 | r_symndx = htab->r_sym (rel->r_info); |
26e41594 AM |
2109 | if (r_symndx >= symtab_hdr->sh_info) |
2110 | { | |
26e41594 | 2111 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
2112 | while (h->root.type == bfd_link_hash_indirect |
2113 | || h->root.type == bfd_link_hash_warning) | |
2114 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 2115 | } |
bb1cb422 L |
2116 | else |
2117 | { | |
2118 | /* A local symbol. */ | |
2119 | Elf_Internal_Sym *isym; | |
2120 | ||
2121 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2122 | abfd, r_symndx); | |
2123 | ||
2124 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
2125 | if (isym != NULL | |
82e96e07 | 2126 | && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
bb1cb422 | 2127 | { |
351f65ca | 2128 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE); |
bb1cb422 L |
2129 | if (h == NULL) |
2130 | abort (); | |
2131 | } | |
2132 | } | |
c434dee6 | 2133 | |
3db2e7dd L |
2134 | if (h) |
2135 | { | |
2136 | struct elf_x86_64_link_hash_entry *eh; | |
2137 | struct elf_dyn_relocs **pp; | |
2138 | struct elf_dyn_relocs *p; | |
2139 | ||
2140 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2141 | ||
2142 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
2143 | if (p->sec == sec) | |
2144 | { | |
2145 | /* Everything must go for SEC. */ | |
2146 | *pp = p->next; | |
2147 | break; | |
2148 | } | |
2149 | } | |
2150 | ||
351f65ca L |
2151 | r_type = ELF32_R_TYPE (rel->r_info); |
2152 | if (! elf_x86_64_tls_transition (info, abfd, sec, NULL, | |
2153 | symtab_hdr, sym_hashes, | |
2154 | &r_type, GOT_UNKNOWN, | |
2155 | rel, relend, h, r_symndx)) | |
142411ca L |
2156 | return FALSE; |
2157 | ||
26e41594 AM |
2158 | switch (r_type) |
2159 | { | |
2160 | case R_X86_64_TLSLD: | |
4dfe6ac6 NC |
2161 | if (htab->tls_ld_got.refcount > 0) |
2162 | htab->tls_ld_got.refcount -= 1; | |
26e41594 | 2163 | break; |
c434dee6 | 2164 | |
26e41594 | 2165 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
2166 | case R_X86_64_GOTPC32_TLSDESC: |
2167 | case R_X86_64_TLSDESC_CALL: | |
26e41594 AM |
2168 | case R_X86_64_GOTTPOFF: |
2169 | case R_X86_64_GOT32: | |
2170 | case R_X86_64_GOTPCREL: | |
7b81dfbb AJ |
2171 | case R_X86_64_GOT64: |
2172 | case R_X86_64_GOTPCREL64: | |
2173 | case R_X86_64_GOTPLT64: | |
26e41594 AM |
2174 | if (h != NULL) |
2175 | { | |
2176 | if (h->got.refcount > 0) | |
2177 | h->got.refcount -= 1; | |
bb1cb422 L |
2178 | if (h->type == STT_GNU_IFUNC) |
2179 | { | |
2180 | if (h->plt.refcount > 0) | |
2181 | h->plt.refcount -= 1; | |
2182 | } | |
26e41594 AM |
2183 | } |
2184 | else if (local_got_refcounts != NULL) | |
2185 | { | |
2186 | if (local_got_refcounts[r_symndx] > 0) | |
2187 | local_got_refcounts[r_symndx] -= 1; | |
2188 | } | |
2189 | break; | |
c434dee6 | 2190 | |
26e41594 AM |
2191 | case R_X86_64_8: |
2192 | case R_X86_64_16: | |
2193 | case R_X86_64_32: | |
2194 | case R_X86_64_64: | |
2195 | case R_X86_64_32S: | |
2196 | case R_X86_64_PC8: | |
2197 | case R_X86_64_PC16: | |
2198 | case R_X86_64_PC32: | |
c3320543 | 2199 | case R_X86_64_PC32_BND: |
d6ab8113 | 2200 | case R_X86_64_PC64: |
1788fc08 L |
2201 | case R_X86_64_SIZE32: |
2202 | case R_X86_64_SIZE64: | |
3db2e7dd L |
2203 | if (info->shared |
2204 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
26e41594 AM |
2205 | break; |
2206 | /* Fall thru */ | |
c434dee6 | 2207 | |
26e41594 | 2208 | case R_X86_64_PLT32: |
c3320543 | 2209 | case R_X86_64_PLT32_BND: |
7b81dfbb | 2210 | case R_X86_64_PLTOFF64: |
26e41594 AM |
2211 | if (h != NULL) |
2212 | { | |
2213 | if (h->plt.refcount > 0) | |
2214 | h->plt.refcount -= 1; | |
2215 | } | |
2216 | break; | |
70256ad8 | 2217 | |
26e41594 AM |
2218 | default: |
2219 | break; | |
2220 | } | |
2221 | } | |
70256ad8 | 2222 | |
b34976b6 | 2223 | return TRUE; |
70256ad8 AJ |
2224 | } |
2225 | ||
2226 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
2227 | regular object. The current definition is in some section of the | |
2228 | dynamic object, but we're not including those sections. We have to | |
2229 | change the definition to something the rest of the link can | |
407443a3 | 2230 | understand. */ |
70256ad8 | 2231 | |
b34976b6 | 2232 | static bfd_boolean |
351f65ca L |
2233 | elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
2234 | struct elf_link_hash_entry *h) | |
70256ad8 | 2235 | { |
351f65ca | 2236 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 | 2237 | asection *s; |
5ca5bb35 L |
2238 | struct elf_x86_64_link_hash_entry *eh; |
2239 | struct elf_dyn_relocs *p; | |
70256ad8 | 2240 | |
cbe950e9 L |
2241 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2242 | if (h->type == STT_GNU_IFUNC) | |
2243 | { | |
73bcf233 L |
2244 | /* All local STT_GNU_IFUNC references must be treate as local |
2245 | calls via local PLT. */ | |
5ca5bb35 L |
2246 | if (h->ref_regular |
2247 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2248 | { | |
73bcf233 | 2249 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2250 | struct elf_dyn_relocs **pp; |
2251 | ||
2252 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2253 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2254 | { | |
2255 | pc_count += p->pc_count; | |
2256 | p->count -= p->pc_count; | |
2257 | p->pc_count = 0; | |
73bcf233 | 2258 | count += p->count; |
5ca5bb35 L |
2259 | if (p->count == 0) |
2260 | *pp = p->next; | |
2261 | else | |
2262 | pp = &p->next; | |
2263 | } | |
2264 | ||
73bcf233 | 2265 | if (pc_count || count) |
5ca5bb35 L |
2266 | { |
2267 | h->needs_plt = 1; | |
5ca5bb35 | 2268 | h->non_got_ref = 1; |
a5479e5f L |
2269 | if (h->plt.refcount <= 0) |
2270 | h->plt.refcount = 1; | |
2271 | else | |
2272 | h->plt.refcount += 1; | |
5ca5bb35 L |
2273 | } |
2274 | } | |
2275 | ||
cbe950e9 L |
2276 | if (h->plt.refcount <= 0) |
2277 | { | |
2278 | h->plt.offset = (bfd_vma) -1; | |
2279 | h->needs_plt = 0; | |
2280 | } | |
2281 | return TRUE; | |
2282 | } | |
2283 | ||
70256ad8 AJ |
2284 | /* If this is a function, put it in the procedure linkage table. We |
2285 | will fill in the contents of the procedure linkage table later, | |
2286 | when we know the address of the .got section. */ | |
2287 | if (h->type == STT_FUNC | |
f5385ebf | 2288 | || h->needs_plt) |
70256ad8 | 2289 | { |
c434dee6 | 2290 | if (h->plt.refcount <= 0 |
27482721 AJ |
2291 | || SYMBOL_CALLS_LOCAL (info, h) |
2292 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2293 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 2294 | { |
70256ad8 AJ |
2295 | /* This case can occur if we saw a PLT32 reloc in an input |
2296 | file, but the symbol was never referred to by a dynamic | |
2297 | object, or if all references were garbage collected. In | |
2298 | such a case, we don't actually need to build a procedure | |
2299 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 2300 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2301 | h->needs_plt = 0; |
70256ad8 AJ |
2302 | } |
2303 | ||
b34976b6 | 2304 | return TRUE; |
70256ad8 | 2305 | } |
bbd7ec4a | 2306 | else |
c434dee6 AJ |
2307 | /* It's possible that we incorrectly decided a .plt reloc was |
2308 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
2309 | check_relocs. We can't decide accurately between function and | |
2310 | non-function syms in check-relocs; Objects loaded later in | |
2311 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2312 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
2313 | |
2314 | /* If this is a weak symbol, and there is a real definition, the | |
2315 | processor independent code will have arranged for us to see the | |
407443a3 | 2316 | real definition first, and we can just use the same value. */ |
f6e332e6 | 2317 | if (h->u.weakdef != NULL) |
70256ad8 | 2318 | { |
f6e332e6 AM |
2319 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2320 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2321 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2322 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 2323 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 2324 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 2325 | return TRUE; |
70256ad8 AJ |
2326 | } |
2327 | ||
2328 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 2329 | is not a function. */ |
70256ad8 AJ |
2330 | |
2331 | /* If we are creating a shared library, we must presume that the | |
2332 | only references to the symbol are via the global offset table. | |
2333 | For such cases we need not do anything here; the relocations will | |
407443a3 | 2334 | be handled correctly by relocate_section. */ |
70256ad8 | 2335 | if (info->shared) |
b34976b6 | 2336 | return TRUE; |
70256ad8 AJ |
2337 | |
2338 | /* If there are no references to this symbol that do not use the | |
2339 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 2340 | if (!h->non_got_ref) |
b34976b6 | 2341 | return TRUE; |
70256ad8 | 2342 | |
c434dee6 AJ |
2343 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2344 | if (info->nocopyreloc) | |
2345 | { | |
f5385ebf | 2346 | h->non_got_ref = 0; |
b34976b6 | 2347 | return TRUE; |
c434dee6 AJ |
2348 | } |
2349 | ||
d40d037c | 2350 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 2351 | { |
351f65ca | 2352 | eh = (struct elf_x86_64_link_hash_entry *) h; |
d40d037c AJ |
2353 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2354 | { | |
2355 | s = p->sec->output_section; | |
2356 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2357 | break; | |
2358 | } | |
2359 | ||
2360 | /* If we didn't find any dynamic relocs in read-only sections, then | |
2361 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
2362 | if (p == NULL) | |
2363 | { | |
f5385ebf | 2364 | h->non_got_ref = 0; |
d40d037c AJ |
2365 | return TRUE; |
2366 | } | |
c434dee6 AJ |
2367 | } |
2368 | ||
70256ad8 | 2369 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 2370 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
2371 | an entry for this symbol in the .dynsym section. The dynamic |
2372 | object will contain position independent code, so all references | |
2373 | from the dynamic object to this symbol will go through the global | |
2374 | offset table. The dynamic linker will use the .dynsym entry to | |
2375 | determine the address it must put in the global offset table, so | |
2376 | both the dynamic object and the regular object will refer to the | |
2377 | same memory location for the variable. */ | |
2378 | ||
351f65ca | 2379 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2380 | if (htab == NULL) |
2381 | return FALSE; | |
70256ad8 AJ |
2382 | |
2383 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
2384 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 2385 | runtime process image. */ |
1d7e9d18 | 2386 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
70256ad8 | 2387 | { |
351f65ca L |
2388 | const struct elf_backend_data *bed; |
2389 | bed = get_elf_backend_data (info->output_bfd); | |
2390 | htab->srelbss->size += bed->s->sizeof_rela; | |
f5385ebf | 2391 | h->needs_copy = 1; |
70256ad8 AJ |
2392 | } |
2393 | ||
c434dee6 | 2394 | s = htab->sdynbss; |
70256ad8 | 2395 | |
027297b7 | 2396 | return _bfd_elf_adjust_dynamic_copy (h, s); |
70256ad8 AJ |
2397 | } |
2398 | ||
c434dee6 AJ |
2399 | /* Allocate space in .plt, .got and associated reloc sections for |
2400 | dynamic relocs. */ | |
2401 | ||
b34976b6 | 2402 | static bfd_boolean |
351f65ca | 2403 | elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
2404 | { |
2405 | struct bfd_link_info *info; | |
351f65ca L |
2406 | struct elf_x86_64_link_hash_table *htab; |
2407 | struct elf_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 2408 | struct elf_dyn_relocs *p; |
351f65ca | 2409 | const struct elf_backend_data *bed; |
eed180f8 | 2410 | unsigned int plt_entry_size; |
c434dee6 | 2411 | |
e92d460e | 2412 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2413 | return TRUE; |
c434dee6 | 2414 | |
351f65ca | 2415 | eh = (struct elf_x86_64_link_hash_entry *) h; |
e92d460e | 2416 | |
c434dee6 | 2417 | info = (struct bfd_link_info *) inf; |
351f65ca | 2418 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2419 | if (htab == NULL) |
2420 | return FALSE; | |
351f65ca | 2421 | bed = get_elf_backend_data (info->output_bfd); |
eed180f8 | 2422 | plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
c434dee6 | 2423 | |
cbe950e9 L |
2424 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2425 | here if it is defined and referenced in a non-shared object. */ | |
2426 | if (h->type == STT_GNU_IFUNC | |
2427 | && h->def_regular) | |
0ff2b86e L |
2428 | { |
2429 | if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, | |
2430 | &eh->dyn_relocs, | |
2431 | plt_entry_size, | |
2432 | plt_entry_size, | |
2433 | GOT_ENTRY_SIZE)) | |
2434 | { | |
2435 | asection *s = htab->plt_bnd; | |
2436 | if (h->plt.offset != (bfd_vma) -1 && s != NULL) | |
2437 | { | |
2438 | /* Use the .plt.bnd section if it is created. */ | |
2439 | eh->plt_bnd.offset = s->size; | |
2440 | ||
2441 | /* Make room for this entry in the .plt.bnd section. */ | |
2442 | s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
2443 | } | |
2444 | ||
2445 | return TRUE; | |
2446 | } | |
2447 | else | |
2448 | return FALSE; | |
2449 | } | |
cbe950e9 L |
2450 | else if (htab->elf.dynamic_sections_created |
2451 | && h->plt.refcount > 0) | |
c434dee6 AJ |
2452 | { |
2453 | /* Make sure this symbol is output as a dynamic symbol. | |
2454 | Undefined weak syms won't yet be marked as dynamic. */ | |
2455 | if (h->dynindx == -1 | |
f5385ebf | 2456 | && !h->forced_local) |
c434dee6 | 2457 | { |
c152c796 | 2458 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2459 | return FALSE; |
c434dee6 AJ |
2460 | } |
2461 | ||
27482721 AJ |
2462 | if (info->shared |
2463 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
c434dee6 | 2464 | { |
6de2ae4a | 2465 | asection *s = htab->elf.splt; |
0ff2b86e | 2466 | asection *bnd_s = htab->plt_bnd; |
c434dee6 AJ |
2467 | |
2468 | /* If this is the first .plt entry, make room for the special | |
2469 | first entry. */ | |
eea6121a | 2470 | if (s->size == 0) |
bb81b736 | 2471 | s->size = plt_entry_size; |
c434dee6 | 2472 | |
eea6121a | 2473 | h->plt.offset = s->size; |
0ff2b86e L |
2474 | if (bnd_s) |
2475 | eh->plt_bnd.offset = bnd_s->size; | |
c434dee6 AJ |
2476 | |
2477 | /* If this symbol is not defined in a regular file, and we are | |
2478 | not generating a shared library, then set the symbol to this | |
2479 | location in the .plt. This is required to make function | |
2480 | pointers compare as equal between the normal executable and | |
2481 | the shared library. */ | |
2482 | if (! info->shared | |
f5385ebf | 2483 | && !h->def_regular) |
c434dee6 | 2484 | { |
0ff2b86e L |
2485 | if (bnd_s) |
2486 | { | |
2487 | /* We need to make a call to the entry of the second | |
2488 | PLT instead of regular PLT entry. */ | |
2489 | h->root.u.def.section = bnd_s; | |
2490 | h->root.u.def.value = eh->plt_bnd.offset; | |
2491 | } | |
2492 | else | |
2493 | { | |
2494 | h->root.u.def.section = s; | |
2495 | h->root.u.def.value = h->plt.offset; | |
2496 | } | |
c434dee6 AJ |
2497 | } |
2498 | ||
2499 | /* Make room for this entry. */ | |
eed180f8 | 2500 | s->size += plt_entry_size; |
0ff2b86e L |
2501 | if (bnd_s) |
2502 | { | |
2503 | BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry) | |
2504 | == sizeof (elf_x86_64_legacy_plt2_entry)); | |
2505 | bnd_s->size += sizeof (elf_x86_64_legacy_plt2_entry); | |
2506 | } | |
c434dee6 AJ |
2507 | |
2508 | /* We also need to make an entry in the .got.plt section, which | |
2509 | will be placed in the .got section by the linker script. */ | |
6de2ae4a | 2510 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; |
c434dee6 AJ |
2511 | |
2512 | /* We also need to make an entry in the .rela.plt section. */ | |
351f65ca | 2513 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
6de2ae4a | 2514 | htab->elf.srelplt->reloc_count++; |
c434dee6 AJ |
2515 | } |
2516 | else | |
2517 | { | |
2518 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 2519 | h->needs_plt = 0; |
c434dee6 AJ |
2520 | } |
2521 | } | |
2522 | else | |
2523 | { | |
2524 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 2525 | h->needs_plt = 0; |
c434dee6 AJ |
2526 | } |
2527 | ||
67a4f2b7 AO |
2528 | eh->tlsdesc_got = (bfd_vma) -1; |
2529 | ||
bffbf940 JJ |
2530 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
2531 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
2532 | if (h->got.refcount > 0 | |
1d85728f | 2533 | && info->executable |
bffbf940 | 2534 | && h->dynindx == -1 |
351f65ca | 2535 | && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) |
d8045f23 NC |
2536 | { |
2537 | h->got.offset = (bfd_vma) -1; | |
2538 | } | |
bffbf940 | 2539 | else if (h->got.refcount > 0) |
c434dee6 AJ |
2540 | { |
2541 | asection *s; | |
b34976b6 | 2542 | bfd_boolean dyn; |
351f65ca | 2543 | int tls_type = elf_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
2544 | |
2545 | /* Make sure this symbol is output as a dynamic symbol. | |
2546 | Undefined weak syms won't yet be marked as dynamic. */ | |
2547 | if (h->dynindx == -1 | |
f5385ebf | 2548 | && !h->forced_local) |
c434dee6 | 2549 | { |
c152c796 | 2550 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2551 | return FALSE; |
c434dee6 AJ |
2552 | } |
2553 | ||
67a4f2b7 AO |
2554 | if (GOT_TLS_GDESC_P (tls_type)) |
2555 | { | |
6de2ae4a | 2556 | eh->tlsdesc_got = htab->elf.sgotplt->size |
351f65ca | 2557 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2558 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2559 | h->got.offset = (bfd_vma) -2; |
2560 | } | |
2561 | if (! GOT_TLS_GDESC_P (tls_type) | |
2562 | || GOT_TLS_GD_P (tls_type)) | |
2563 | { | |
6de2ae4a | 2564 | s = htab->elf.sgot; |
67a4f2b7 AO |
2565 | h->got.offset = s->size; |
2566 | s->size += GOT_ENTRY_SIZE; | |
2567 | if (GOT_TLS_GD_P (tls_type)) | |
2568 | s->size += GOT_ENTRY_SIZE; | |
2569 | } | |
c434dee6 | 2570 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 JJ |
2571 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
2572 | and two if global. | |
2573 | R_X86_64_GOTTPOFF needs one dynamic relocation. */ | |
67a4f2b7 | 2574 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 2575 | || tls_type == GOT_TLS_IE) |
351f65ca | 2576 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 | 2577 | else if (GOT_TLS_GD_P (tls_type)) |
351f65ca | 2578 | htab->elf.srelgot->size += 2 * bed->s->sizeof_rela; |
67a4f2b7 AO |
2579 | else if (! GOT_TLS_GDESC_P (tls_type) |
2580 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2581 | || h->root.type != bfd_link_hash_undefweak) | |
27482721 AJ |
2582 | && (info->shared |
2583 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
351f65ca | 2584 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2585 | if (GOT_TLS_GDESC_P (tls_type)) |
2586 | { | |
351f65ca | 2587 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2588 | htab->tlsdesc_plt = (bfd_vma) -1; |
2589 | } | |
c434dee6 AJ |
2590 | } |
2591 | else | |
2592 | h->got.offset = (bfd_vma) -1; | |
2593 | ||
c434dee6 | 2594 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2595 | return TRUE; |
c434dee6 AJ |
2596 | |
2597 | /* In the shared -Bsymbolic case, discard space allocated for | |
2598 | dynamic pc-relative relocs against symbols which turn out to be | |
2599 | defined in regular objects. For the normal shared case, discard | |
2600 | space for pc-relative relocs that have become local due to symbol | |
2601 | visibility changes. */ | |
2602 | ||
2603 | if (info->shared) | |
2604 | { | |
27482721 AJ |
2605 | /* Relocs that use pc_count are those that appear on a call |
2606 | insn, or certain REL relocs that can generated via assembly. | |
2607 | We want calls to protected symbols to resolve directly to the | |
2608 | function rather than going via the plt. If people want | |
2609 | function pointer comparisons to work as expected then they | |
2610 | should avoid writing weird assembly. */ | |
2611 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 2612 | { |
e03a8ed8 | 2613 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
2614 | |
2615 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2616 | { | |
c3ce498c L |
2617 | p->count -= p->pc_count; |
2618 | p->pc_count = 0; | |
c434dee6 AJ |
2619 | if (p->count == 0) |
2620 | *pp = p->next; | |
2621 | else | |
2622 | pp = &p->next; | |
2623 | } | |
2624 | } | |
4e795f50 AM |
2625 | |
2626 | /* Also discard relocs on undefined weak syms with non-default | |
c353e543 | 2627 | visibility. */ |
22d606e9 | 2628 | if (eh->dyn_relocs != NULL |
c353e543 | 2629 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
2630 | { |
2631 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2632 | eh->dyn_relocs = NULL; | |
2633 | ||
2634 | /* Make sure undefined weak symbols are output as a dynamic | |
2635 | symbol in PIEs. */ | |
2636 | else if (h->dynindx == -1 | |
d8045f23 NC |
2637 | && ! h->forced_local |
2638 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2639 | return FALSE; | |
22d606e9 | 2640 | } |
cbe950e9 | 2641 | |
d8045f23 | 2642 | } |
d40d037c | 2643 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
2644 | { |
2645 | /* For the non-shared case, discard space for relocs against | |
2646 | symbols which turn out to need copy relocs or are not | |
2647 | dynamic. */ | |
2648 | ||
f5385ebf AM |
2649 | if (!h->non_got_ref |
2650 | && ((h->def_dynamic | |
2651 | && !h->def_regular) | |
c434dee6 AJ |
2652 | || (htab->elf.dynamic_sections_created |
2653 | && (h->root.type == bfd_link_hash_undefweak | |
2654 | || h->root.type == bfd_link_hash_undefined)))) | |
2655 | { | |
2656 | /* Make sure this symbol is output as a dynamic symbol. | |
2657 | Undefined weak syms won't yet be marked as dynamic. */ | |
2658 | if (h->dynindx == -1 | |
d8045f23 NC |
2659 | && ! h->forced_local |
2660 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2661 | return FALSE; | |
c434dee6 AJ |
2662 | |
2663 | /* If that succeeded, we know we'll be keeping all the | |
2664 | relocs. */ | |
2665 | if (h->dynindx != -1) | |
2666 | goto keep; | |
2667 | } | |
2668 | ||
2669 | eh->dyn_relocs = NULL; | |
2670 | ||
2671 | keep: ; | |
2672 | } | |
2673 | ||
2674 | /* Finally, allocate space. */ | |
2675 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2676 | { | |
e7c33416 NC |
2677 | asection * sreloc; |
2678 | ||
cbe950e9 | 2679 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2680 | |
2681 | BFD_ASSERT (sreloc != NULL); | |
2682 | ||
351f65ca | 2683 | sreloc->size += p->count * bed->s->sizeof_rela; |
c434dee6 AJ |
2684 | } |
2685 | ||
b34976b6 | 2686 | return TRUE; |
c434dee6 AJ |
2687 | } |
2688 | ||
c25bc9fc L |
2689 | /* Allocate space in .plt, .got and associated reloc sections for |
2690 | local dynamic relocs. */ | |
2691 | ||
2692 | static bfd_boolean | |
351f65ca | 2693 | elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf) |
c25bc9fc L |
2694 | { |
2695 | struct elf_link_hash_entry *h | |
2696 | = (struct elf_link_hash_entry *) *slot; | |
2697 | ||
2698 | if (h->type != STT_GNU_IFUNC | |
2699 | || !h->def_regular | |
2700 | || !h->ref_regular | |
2701 | || !h->forced_local | |
2702 | || h->root.type != bfd_link_hash_defined) | |
2703 | abort (); | |
2704 | ||
351f65ca | 2705 | return elf_x86_64_allocate_dynrelocs (h, inf); |
c25bc9fc L |
2706 | } |
2707 | ||
c434dee6 AJ |
2708 | /* Find any dynamic relocs that apply to read-only sections. */ |
2709 | ||
b34976b6 | 2710 | static bfd_boolean |
351f65ca L |
2711 | elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h, |
2712 | void * inf) | |
c434dee6 | 2713 | { |
351f65ca | 2714 | struct elf_x86_64_link_hash_entry *eh; |
e03a8ed8 | 2715 | struct elf_dyn_relocs *p; |
c434dee6 | 2716 | |
aa715242 L |
2717 | /* Skip local IFUNC symbols. */ |
2718 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
2719 | return TRUE; | |
2720 | ||
351f65ca | 2721 | eh = (struct elf_x86_64_link_hash_entry *) h; |
c434dee6 AJ |
2722 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2723 | { | |
2724 | asection *s = p->sec->output_section; | |
2725 | ||
2726 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2727 | { | |
2728 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2729 | ||
2730 | info->flags |= DF_TEXTREL; | |
2731 | ||
b70321a2 L |
2732 | if (info->warn_shared_textrel && info->shared) |
2733 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"), | |
2734 | p->sec->owner, h->root.root.string, | |
2735 | p->sec); | |
2736 | ||
c434dee6 | 2737 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 2738 | return FALSE; |
c434dee6 AJ |
2739 | } |
2740 | } | |
b34976b6 | 2741 | return TRUE; |
c434dee6 AJ |
2742 | } |
2743 | ||
daa67607 L |
2744 | /* Convert |
2745 | mov foo@GOTPCREL(%rip), %reg | |
2746 | to | |
2747 | lea foo(%rip), %reg | |
2748 | with the local symbol, foo. */ | |
2749 | ||
2750 | static bfd_boolean | |
2751 | elf_x86_64_convert_mov_to_lea (bfd *abfd, asection *sec, | |
2752 | struct bfd_link_info *link_info) | |
2753 | { | |
2754 | Elf_Internal_Shdr *symtab_hdr; | |
2755 | Elf_Internal_Rela *internal_relocs; | |
2756 | Elf_Internal_Rela *irel, *irelend; | |
2757 | bfd_byte *contents; | |
2758 | struct elf_x86_64_link_hash_table *htab; | |
2759 | bfd_boolean changed_contents; | |
2760 | bfd_boolean changed_relocs; | |
2761 | bfd_signed_vma *local_got_refcounts; | |
2762 | ||
2763 | /* Don't even try to convert non-ELF outputs. */ | |
2764 | if (!is_elf_hash_table (link_info->hash)) | |
2765 | return FALSE; | |
2766 | ||
fbdc86d9 | 2767 | /* Nothing to do if there are no codes, no relocations or no output. */ |
daa67607 | 2768 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
fbdc86d9 | 2769 | || sec->reloc_count == 0 |
c8831961 | 2770 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
2771 | return TRUE; |
2772 | ||
2773 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2774 | ||
2775 | /* Load the relocations for this section. */ | |
2776 | internal_relocs = (_bfd_elf_link_read_relocs | |
2777 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
2778 | link_info->keep_memory)); | |
2779 | if (internal_relocs == NULL) | |
2780 | return FALSE; | |
2781 | ||
2782 | htab = elf_x86_64_hash_table (link_info); | |
2783 | changed_contents = FALSE; | |
2784 | changed_relocs = FALSE; | |
2785 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2786 | ||
2787 | /* Get the section contents. */ | |
2788 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2789 | contents = elf_section_data (sec)->this_hdr.contents; | |
2790 | else | |
2791 | { | |
2792 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2793 | goto error_return; | |
2794 | } | |
2795 | ||
2796 | irelend = internal_relocs + sec->reloc_count; | |
2797 | for (irel = internal_relocs; irel < irelend; irel++) | |
2798 | { | |
2799 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
2800 | unsigned int r_symndx = htab->r_sym (irel->r_info); | |
2801 | unsigned int indx; | |
2802 | struct elf_link_hash_entry *h; | |
2803 | ||
2804 | if (r_type != R_X86_64_GOTPCREL) | |
2805 | continue; | |
2806 | ||
2807 | /* Get the symbol referred to by the reloc. */ | |
2808 | if (r_symndx < symtab_hdr->sh_info) | |
2809 | { | |
2810 | Elf_Internal_Sym *isym; | |
2811 | ||
2812 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2813 | abfd, r_symndx); | |
2814 | ||
2815 | /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */ | |
2816 | if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC | |
5697705a | 2817 | && irel->r_offset >= 2 |
daa67607 L |
2818 | && bfd_get_8 (input_bfd, |
2819 | contents + irel->r_offset - 2) == 0x8b) | |
2820 | { | |
2821 | bfd_put_8 (output_bfd, 0x8d, | |
2822 | contents + irel->r_offset - 2); | |
2823 | irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32); | |
2824 | if (local_got_refcounts != NULL | |
2825 | && local_got_refcounts[r_symndx] > 0) | |
2826 | local_got_refcounts[r_symndx] -= 1; | |
2827 | changed_contents = TRUE; | |
2828 | changed_relocs = TRUE; | |
2829 | } | |
2830 | continue; | |
2831 | } | |
2832 | ||
2833 | indx = r_symndx - symtab_hdr->sh_info; | |
2834 | h = elf_sym_hashes (abfd)[indx]; | |
2835 | BFD_ASSERT (h != NULL); | |
2836 | ||
2837 | while (h->root.type == bfd_link_hash_indirect | |
2838 | || h->root.type == bfd_link_hash_warning) | |
2839 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2840 | ||
3f65f599 L |
2841 | /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also |
2842 | avoid optimizing _DYNAMIC since ld.so may use its link-time | |
2843 | address. */ | |
daa67607 L |
2844 | if (h->def_regular |
2845 | && h->type != STT_GNU_IFUNC | |
9637f6ef | 2846 | && h != htab->elf.hdynamic |
daa67607 | 2847 | && SYMBOL_REFERENCES_LOCAL (link_info, h) |
5697705a | 2848 | && irel->r_offset >= 2 |
daa67607 L |
2849 | && bfd_get_8 (input_bfd, |
2850 | contents + irel->r_offset - 2) == 0x8b) | |
2851 | { | |
2852 | bfd_put_8 (output_bfd, 0x8d, | |
2853 | contents + irel->r_offset - 2); | |
2854 | irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32); | |
2855 | if (h->got.refcount > 0) | |
2856 | h->got.refcount -= 1; | |
2857 | changed_contents = TRUE; | |
2858 | changed_relocs = TRUE; | |
2859 | } | |
2860 | } | |
2861 | ||
2862 | if (contents != NULL | |
2863 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2864 | { | |
2865 | if (!changed_contents && !link_info->keep_memory) | |
2866 | free (contents); | |
2867 | else | |
2868 | { | |
2869 | /* Cache the section contents for elf_link_input_bfd. */ | |
2870 | elf_section_data (sec)->this_hdr.contents = contents; | |
2871 | } | |
2872 | } | |
2873 | ||
2874 | if (elf_section_data (sec)->relocs != internal_relocs) | |
2875 | { | |
2876 | if (!changed_relocs) | |
2877 | free (internal_relocs); | |
2878 | else | |
2879 | elf_section_data (sec)->relocs = internal_relocs; | |
2880 | } | |
2881 | ||
2882 | return TRUE; | |
2883 | ||
2884 | error_return: | |
2885 | if (contents != NULL | |
2886 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2887 | free (contents); | |
2888 | if (internal_relocs != NULL | |
2889 | && elf_section_data (sec)->relocs != internal_relocs) | |
2890 | free (internal_relocs); | |
2891 | return FALSE; | |
2892 | } | |
2893 | ||
70256ad8 AJ |
2894 | /* Set the sizes of the dynamic sections. */ |
2895 | ||
b34976b6 | 2896 | static bfd_boolean |
351f65ca L |
2897 | elf_x86_64_size_dynamic_sections (bfd *output_bfd, |
2898 | struct bfd_link_info *info) | |
70256ad8 | 2899 | { |
351f65ca | 2900 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2901 | bfd *dynobj; |
2902 | asection *s; | |
b34976b6 | 2903 | bfd_boolean relocs; |
c434dee6 | 2904 | bfd *ibfd; |
351f65ca | 2905 | const struct elf_backend_data *bed; |
70256ad8 | 2906 | |
351f65ca | 2907 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2908 | if (htab == NULL) |
2909 | return FALSE; | |
351f65ca | 2910 | bed = get_elf_backend_data (output_bfd); |
4dfe6ac6 | 2911 | |
c434dee6 AJ |
2912 | dynobj = htab->elf.dynobj; |
2913 | if (dynobj == NULL) | |
2914 | abort (); | |
70256ad8 | 2915 | |
c434dee6 | 2916 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
2917 | { |
2918 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 2919 | if (info->executable) |
70256ad8 | 2920 | { |
3d4d4302 | 2921 | s = bfd_get_linker_section (dynobj, ".interp"); |
c434dee6 AJ |
2922 | if (s == NULL) |
2923 | abort (); | |
351f65ca L |
2924 | s->size = htab->dynamic_interpreter_size; |
2925 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
70256ad8 AJ |
2926 | } |
2927 | } | |
70256ad8 | 2928 | |
c434dee6 AJ |
2929 | /* Set up .got offsets for local syms, and space for local dynamic |
2930 | relocs. */ | |
c72f2fb2 | 2931 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
70256ad8 | 2932 | { |
c434dee6 AJ |
2933 | bfd_signed_vma *local_got; |
2934 | bfd_signed_vma *end_local_got; | |
bffbf940 | 2935 | char *local_tls_type; |
67a4f2b7 | 2936 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
2937 | bfd_size_type locsymcount; |
2938 | Elf_Internal_Shdr *symtab_hdr; | |
2939 | asection *srel; | |
70256ad8 | 2940 | |
0ffa91dd | 2941 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
2942 | continue; |
2943 | ||
c434dee6 | 2944 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 2945 | { |
e03a8ed8 | 2946 | struct elf_dyn_relocs *p; |
c434dee6 | 2947 | |
daa67607 L |
2948 | if (!elf_x86_64_convert_mov_to_lea (ibfd, s, info)) |
2949 | return FALSE; | |
2950 | ||
e03a8ed8 | 2951 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 2952 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
2953 | p != NULL; |
2954 | p = p->next) | |
70256ad8 | 2955 | { |
c434dee6 AJ |
2956 | if (!bfd_is_abs_section (p->sec) |
2957 | && bfd_is_abs_section (p->sec->output_section)) | |
2958 | { | |
2959 | /* Input section has been discarded, either because | |
2960 | it is a copy of a linkonce section or due to | |
2961 | linker script /DISCARD/, so we'll be discarding | |
2962 | the relocs too. */ | |
2963 | } | |
2964 | else if (p->count != 0) | |
2965 | { | |
2966 | srel = elf_section_data (p->sec)->sreloc; | |
351f65ca | 2967 | srel->size += p->count * bed->s->sizeof_rela; |
4b819e1f L |
2968 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
2969 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
2970 | { |
2971 | info->flags |= DF_TEXTREL; | |
2972 | if (info->warn_shared_textrel && info->shared) | |
2973 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"), | |
2974 | p->sec->owner, p->sec); | |
b70321a2 | 2975 | } |
c434dee6 | 2976 | } |
70256ad8 AJ |
2977 | } |
2978 | } | |
c434dee6 AJ |
2979 | |
2980 | local_got = elf_local_got_refcounts (ibfd); | |
2981 | if (!local_got) | |
2982 | continue; | |
2983 | ||
0ffa91dd | 2984 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
2985 | locsymcount = symtab_hdr->sh_info; |
2986 | end_local_got = local_got + locsymcount; | |
351f65ca L |
2987 | local_tls_type = elf_x86_64_local_got_tls_type (ibfd); |
2988 | local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd); | |
6de2ae4a L |
2989 | s = htab->elf.sgot; |
2990 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
2991 | for (; local_got < end_local_got; |
2992 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 2993 | { |
67a4f2b7 | 2994 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 2995 | if (*local_got > 0) |
70256ad8 | 2996 | { |
67a4f2b7 AO |
2997 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
2998 | { | |
6de2ae4a | 2999 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
351f65ca | 3000 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 3001 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
3002 | *local_got = (bfd_vma) -2; |
3003 | } | |
3004 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3005 | || GOT_TLS_GD_P (*local_tls_type)) | |
3006 | { | |
3007 | *local_got = s->size; | |
3008 | s->size += GOT_ENTRY_SIZE; | |
3009 | if (GOT_TLS_GD_P (*local_tls_type)) | |
3010 | s->size += GOT_ENTRY_SIZE; | |
3011 | } | |
bffbf940 | 3012 | if (info->shared |
67a4f2b7 | 3013 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 3014 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
3015 | { |
3016 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
3017 | { | |
6de2ae4a | 3018 | htab->elf.srelplt->size |
351f65ca | 3019 | += bed->s->sizeof_rela; |
67a4f2b7 AO |
3020 | htab->tlsdesc_plt = (bfd_vma) -1; |
3021 | } | |
3022 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3023 | || GOT_TLS_GD_P (*local_tls_type)) | |
351f65ca | 3024 | srel->size += bed->s->sizeof_rela; |
67a4f2b7 | 3025 | } |
70256ad8 AJ |
3026 | } |
3027 | else | |
c434dee6 AJ |
3028 | *local_got = (bfd_vma) -1; |
3029 | } | |
3030 | } | |
70256ad8 | 3031 | |
bffbf940 JJ |
3032 | if (htab->tls_ld_got.refcount > 0) |
3033 | { | |
3034 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
3035 | relocs. */ | |
6de2ae4a L |
3036 | htab->tls_ld_got.offset = htab->elf.sgot->size; |
3037 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; | |
351f65ca | 3038 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
bffbf940 JJ |
3039 | } |
3040 | else | |
3041 | htab->tls_ld_got.offset = -1; | |
3042 | ||
c434dee6 AJ |
3043 | /* Allocate global sym .plt and .got entries, and space for global |
3044 | sym dynamic relocs. */ | |
351f65ca | 3045 | elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs, |
eb4ff4d6 | 3046 | info); |
c434dee6 | 3047 | |
c25bc9fc L |
3048 | /* Allocate .plt and .got entries, and space for local symbols. */ |
3049 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 3050 | elf_x86_64_allocate_local_dynrelocs, |
c25bc9fc L |
3051 | info); |
3052 | ||
67a4f2b7 AO |
3053 | /* For every jump slot reserved in the sgotplt, reloc_count is |
3054 | incremented. However, when we reserve space for TLS descriptors, | |
3055 | it's not incremented, so in order to compute the space reserved | |
3056 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 L |
3057 | slot size. |
3058 | ||
3059 | PR ld/13302: We start next_irelative_index at the end of .rela.plt | |
3060 | so that R_X86_64_IRELATIVE entries come last. */ | |
6de2ae4a | 3061 | if (htab->elf.srelplt) |
e1f98742 L |
3062 | { |
3063 | htab->sgotplt_jump_table_size | |
3064 | = elf_x86_64_compute_jump_table_size (htab); | |
3065 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
3066 | } | |
3067 | else if (htab->elf.irelplt) | |
3068 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
67a4f2b7 AO |
3069 | |
3070 | if (htab->tlsdesc_plt) | |
3071 | { | |
3072 | /* If we're not using lazy TLS relocations, don't generate the | |
3073 | PLT and GOT entries they require. */ | |
3074 | if ((info->flags & DF_BIND_NOW)) | |
3075 | htab->tlsdesc_plt = 0; | |
3076 | else | |
3077 | { | |
6de2ae4a L |
3078 | htab->tlsdesc_got = htab->elf.sgot->size; |
3079 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
3080 | /* Reserve room for the initial entry. |
3081 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a | 3082 | if (htab->elf.splt->size == 0) |
eed180f8 | 3083 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
6de2ae4a | 3084 | htab->tlsdesc_plt = htab->elf.splt->size; |
eed180f8 | 3085 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
67a4f2b7 AO |
3086 | } |
3087 | } | |
3088 | ||
a7b16ceb L |
3089 | if (htab->elf.sgotplt) |
3090 | { | |
3091 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
eed180f8 | 3092 | entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
3093 | if ((htab->elf.hgot == NULL |
3094 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
3095 | && (htab->elf.sgotplt->size |
3096 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
3097 | && (htab->elf.splt == NULL |
3098 | || htab->elf.splt->size == 0) | |
3099 | && (htab->elf.sgot == NULL | |
3100 | || htab->elf.sgot->size == 0) | |
3101 | && (htab->elf.iplt == NULL | |
3102 | || htab->elf.iplt->size == 0) | |
3103 | && (htab->elf.igotplt == NULL | |
3104 | || htab->elf.igotplt->size == 0)) | |
3105 | htab->elf.sgotplt->size = 0; | |
3106 | } | |
3107 | ||
9a2a56cc AM |
3108 | if (htab->plt_eh_frame != NULL |
3109 | && htab->elf.splt != NULL | |
3110 | && htab->elf.splt->size != 0 | |
3111 | && !bfd_is_abs_section (htab->elf.splt->output_section) | |
3112 | && _bfd_elf_eh_frame_present (info)) | |
3113 | { | |
3114 | const struct elf_x86_64_backend_data *arch_data | |
f8222080 | 3115 | = get_elf_x86_64_arch_data (bed); |
9a2a56cc AM |
3116 | htab->plt_eh_frame->size = arch_data->eh_frame_plt_size; |
3117 | } | |
3118 | ||
c434dee6 AJ |
3119 | /* We now have determined the sizes of the various dynamic sections. |
3120 | Allocate memory for them. */ | |
b34976b6 | 3121 | relocs = FALSE; |
c434dee6 AJ |
3122 | for (s = dynobj->sections; s != NULL; s = s->next) |
3123 | { | |
3124 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3125 | continue; | |
3126 | ||
6de2ae4a L |
3127 | if (s == htab->elf.splt |
3128 | || s == htab->elf.sgot | |
3129 | || s == htab->elf.sgotplt | |
3130 | || s == htab->elf.iplt | |
3131 | || s == htab->elf.igotplt | |
0ff2b86e | 3132 | || s == htab->plt_bnd |
9a2a56cc | 3133 | || s == htab->plt_eh_frame |
75ff4589 | 3134 | || s == htab->sdynbss) |
c434dee6 AJ |
3135 | { |
3136 | /* Strip this section if we don't need it; see the | |
3137 | comment below. */ | |
3138 | } | |
0112cd26 | 3139 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 3140 | { |
6de2ae4a | 3141 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 3142 | relocs = TRUE; |
c434dee6 AJ |
3143 | |
3144 | /* We use the reloc_count field as a counter if we need | |
3145 | to copy relocs into the output file. */ | |
6de2ae4a | 3146 | if (s != htab->elf.srelplt) |
67a4f2b7 | 3147 | s->reloc_count = 0; |
70256ad8 | 3148 | } |
c434dee6 | 3149 | else |
70256ad8 AJ |
3150 | { |
3151 | /* It's not one of our sections, so don't allocate space. */ | |
3152 | continue; | |
3153 | } | |
3154 | ||
eea6121a | 3155 | if (s->size == 0) |
70256ad8 | 3156 | { |
c434dee6 AJ |
3157 | /* If we don't need this section, strip it from the |
3158 | output file. This is mostly to handle .rela.bss and | |
3159 | .rela.plt. We must create both sections in | |
3160 | create_dynamic_sections, because they must be created | |
3161 | before the linker maps input sections to output | |
3162 | sections. The linker does that before | |
3163 | adjust_dynamic_symbol is called, and it is that | |
3164 | function which decides whether anything needs to go | |
3165 | into these sections. */ | |
3166 | ||
8423293d | 3167 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
3168 | continue; |
3169 | } | |
3170 | ||
c456f082 AM |
3171 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3172 | continue; | |
3173 | ||
70256ad8 AJ |
3174 | /* Allocate memory for the section contents. We use bfd_zalloc |
3175 | here in case unused entries are not reclaimed before the | |
3176 | section's contents are written out. This should not happen, | |
3177 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
3178 | of garbage. */ | |
eea6121a | 3179 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 3180 | if (s->contents == NULL) |
b34976b6 | 3181 | return FALSE; |
70256ad8 AJ |
3182 | } |
3183 | ||
e41b3a13 | 3184 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3185 | && htab->plt_eh_frame->contents != NULL) |
3186 | { | |
3187 | const struct elf_x86_64_backend_data *arch_data | |
f8222080 | 3188 | = get_elf_x86_64_arch_data (bed); |
9a2a56cc AM |
3189 | |
3190 | memcpy (htab->plt_eh_frame->contents, | |
3191 | arch_data->eh_frame_plt, htab->plt_eh_frame->size); | |
3192 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
3193 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
3194 | } | |
e41b3a13 | 3195 | |
c434dee6 | 3196 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
3197 | { |
3198 | /* Add some entries to the .dynamic section. We fill in the | |
351f65ca | 3199 | values later, in elf_x86_64_finish_dynamic_sections, but we |
70256ad8 | 3200 | must add the entries now so that we get the correct size for |
407443a3 | 3201 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 3202 | dynamic linker and used by the debugger. */ |
dc810e39 | 3203 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3204 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3205 | |
36af4a4e | 3206 | if (info->executable) |
70256ad8 | 3207 | { |
dc810e39 | 3208 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3209 | return FALSE; |
70256ad8 AJ |
3210 | } |
3211 | ||
6de2ae4a | 3212 | if (htab->elf.splt->size != 0) |
70256ad8 | 3213 | { |
dc810e39 AM |
3214 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
3215 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
3216 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
3217 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 3218 | return FALSE; |
67a4f2b7 AO |
3219 | |
3220 | if (htab->tlsdesc_plt | |
3221 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
3222 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
3223 | return FALSE; | |
70256ad8 AJ |
3224 | } |
3225 | ||
3226 | if (relocs) | |
3227 | { | |
dc810e39 AM |
3228 | if (!add_dynamic_entry (DT_RELA, 0) |
3229 | || !add_dynamic_entry (DT_RELASZ, 0) | |
351f65ca | 3230 | || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela)) |
b34976b6 | 3231 | return FALSE; |
70256ad8 | 3232 | |
c434dee6 AJ |
3233 | /* If any dynamic relocs apply to a read-only section, |
3234 | then we need a DT_TEXTREL entry. */ | |
3235 | if ((info->flags & DF_TEXTREL) == 0) | |
eed180f8 | 3236 | elf_link_hash_traverse (&htab->elf, |
351f65ca | 3237 | elf_x86_64_readonly_dynrelocs, |
eb4ff4d6 | 3238 | info); |
c434dee6 AJ |
3239 | |
3240 | if ((info->flags & DF_TEXTREL) != 0) | |
3241 | { | |
3242 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 3243 | return FALSE; |
c434dee6 | 3244 | } |
70256ad8 AJ |
3245 | } |
3246 | } | |
dc810e39 | 3247 | #undef add_dynamic_entry |
70256ad8 | 3248 | |
b34976b6 | 3249 | return TRUE; |
70256ad8 AJ |
3250 | } |
3251 | ||
67a4f2b7 | 3252 | static bfd_boolean |
351f65ca L |
3253 | elf_x86_64_always_size_sections (bfd *output_bfd, |
3254 | struct bfd_link_info *info) | |
67a4f2b7 AO |
3255 | { |
3256 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3257 | ||
3258 | if (tls_sec) | |
3259 | { | |
3260 | struct elf_link_hash_entry *tlsbase; | |
3261 | ||
3262 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3263 | "_TLS_MODULE_BASE_", | |
3264 | FALSE, FALSE, FALSE); | |
3265 | ||
3266 | if (tlsbase && tlsbase->type == STT_TLS) | |
3267 | { | |
351f65ca | 3268 | struct elf_x86_64_link_hash_table *htab; |
67a4f2b7 AO |
3269 | struct bfd_link_hash_entry *bh = NULL; |
3270 | const struct elf_backend_data *bed | |
3271 | = get_elf_backend_data (output_bfd); | |
3272 | ||
351f65ca | 3273 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3274 | if (htab == NULL) |
3275 | return FALSE; | |
3276 | ||
67a4f2b7 AO |
3277 | if (!(_bfd_generic_link_add_one_symbol |
3278 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3279 | tls_sec, 0, NULL, FALSE, | |
3280 | bed->collect, &bh))) | |
3281 | return FALSE; | |
9f03412a | 3282 | |
4dfe6ac6 | 3283 | htab->tls_module_base = bh; |
9f03412a | 3284 | |
67a4f2b7 AO |
3285 | tlsbase = (struct elf_link_hash_entry *)bh; |
3286 | tlsbase->def_regular = 1; | |
3287 | tlsbase->other = STV_HIDDEN; | |
3288 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
3289 | } | |
3290 | } | |
3291 | ||
3292 | return TRUE; | |
3293 | } | |
3294 | ||
9f03412a AO |
3295 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
3296 | executables. Rather than setting it to the beginning of the TLS | |
3297 | section, we have to set it to the end. This function may be called | |
3298 | multiple times, it is idempotent. */ | |
3299 | ||
3300 | static void | |
351f65ca | 3301 | elf_x86_64_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 3302 | { |
351f65ca | 3303 | struct elf_x86_64_link_hash_table *htab; |
9f03412a AO |
3304 | struct bfd_link_hash_entry *base; |
3305 | ||
3306 | if (!info->executable) | |
3307 | return; | |
3308 | ||
351f65ca | 3309 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3310 | if (htab == NULL) |
3311 | return; | |
9f03412a | 3312 | |
4dfe6ac6 NC |
3313 | base = htab->tls_module_base; |
3314 | if (base == NULL) | |
9f03412a AO |
3315 | return; |
3316 | ||
4dfe6ac6 | 3317 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
3318 | } |
3319 | ||
bffbf940 JJ |
3320 | /* Return the base VMA address which should be subtracted from real addresses |
3321 | when resolving @dtpoff relocation. | |
3322 | This is PT_TLS segment p_vaddr. */ | |
3323 | ||
3324 | static bfd_vma | |
351f65ca | 3325 | elf_x86_64_dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 3326 | { |
e1918d23 AM |
3327 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3328 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 3329 | return 0; |
e1918d23 | 3330 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
3331 | } |
3332 | ||
3333 | /* Return the relocation value for @tpoff relocation | |
3334 | if STT_TLS virtual address is ADDRESS. */ | |
3335 | ||
3336 | static bfd_vma | |
351f65ca | 3337 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 3338 | { |
e1918d23 | 3339 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3340 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3341 | bfd_vma static_tls_size; | |
bffbf940 JJ |
3342 | |
3343 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 3344 | if (htab->tls_sec == NULL) |
bffbf940 | 3345 | return 0; |
7dc98aea RO |
3346 | |
3347 | /* Consider special static TLS alignment requirements. */ | |
3348 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3349 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
3350 | } |
3351 | ||
90f487df L |
3352 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
3353 | branch? */ | |
3354 | ||
3355 | static bfd_boolean | |
3356 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
3357 | { | |
3358 | /* Opcode Instruction | |
3359 | 0xe8 call | |
3360 | 0xe9 jump | |
3361 | 0x0f 0x8x conditional jump */ | |
3362 | return ((offset > 0 | |
3363 | && (contents [offset - 1] == 0xe8 | |
3364 | || contents [offset - 1] == 0xe9)) | |
3365 | || (offset > 1 | |
3366 | && contents [offset - 2] == 0x0f | |
3367 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
3368 | } | |
3369 | ||
8d88c4ca NC |
3370 | /* Relocate an x86_64 ELF section. */ |
3371 | ||
b34976b6 | 3372 | static bfd_boolean |
351f65ca L |
3373 | elf_x86_64_relocate_section (bfd *output_bfd, |
3374 | struct bfd_link_info *info, | |
3375 | bfd *input_bfd, | |
3376 | asection *input_section, | |
3377 | bfd_byte *contents, | |
3378 | Elf_Internal_Rela *relocs, | |
3379 | Elf_Internal_Sym *local_syms, | |
3380 | asection **local_sections) | |
8d88c4ca | 3381 | { |
351f65ca | 3382 | struct elf_x86_64_link_hash_table *htab; |
8d88c4ca NC |
3383 | Elf_Internal_Shdr *symtab_hdr; |
3384 | struct elf_link_hash_entry **sym_hashes; | |
3385 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3386 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 3387 | Elf_Internal_Rela *rel; |
8d88c4ca | 3388 | Elf_Internal_Rela *relend; |
eed180f8 | 3389 | const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
8d88c4ca | 3390 | |
0ffa91dd NC |
3391 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
3392 | ||
351f65ca | 3393 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3394 | if (htab == NULL) |
3395 | return FALSE; | |
0ffa91dd | 3396 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
3397 | sym_hashes = elf_sym_hashes (input_bfd); |
3398 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
351f65ca | 3399 | local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 3400 | |
351f65ca | 3401 | elf_x86_64_set_tls_module_base (info); |
9f03412a | 3402 | |
c434dee6 | 3403 | rel = relocs; |
8d88c4ca | 3404 | relend = relocs + input_section->reloc_count; |
c434dee6 | 3405 | for (; rel < relend; rel++) |
8d88c4ca | 3406 | { |
bffbf940 | 3407 | unsigned int r_type; |
8d88c4ca NC |
3408 | reloc_howto_type *howto; |
3409 | unsigned long r_symndx; | |
3410 | struct elf_link_hash_entry *h; | |
0ff2b86e | 3411 | struct elf_x86_64_link_hash_entry *eh; |
8d88c4ca NC |
3412 | Elf_Internal_Sym *sym; |
3413 | asection *sec; | |
0ff2b86e | 3414 | bfd_vma off, offplt, plt_offset; |
8d88c4ca | 3415 | bfd_vma relocation; |
b34976b6 | 3416 | bfd_boolean unresolved_reloc; |
8d88c4ca | 3417 | bfd_reloc_status_type r; |
bffbf940 | 3418 | int tls_type; |
0ff2b86e | 3419 | asection *base_got, *resolved_plt; |
1788fc08 | 3420 | bfd_vma st_size; |
8d88c4ca | 3421 | |
351f65ca | 3422 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
3423 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
3424 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
3425 | continue; | |
8d88c4ca | 3426 | |
9911c0fc | 3427 | if (r_type >= (int) R_X86_64_standard) |
8da6118f | 3428 | { |
9911c0fc L |
3429 | (*_bfd_error_handler) |
3430 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), | |
3431 | input_bfd, input_section, r_type); | |
8da6118f | 3432 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 3433 | return FALSE; |
8da6118f | 3434 | } |
8d88c4ca | 3435 | |
d7921315 | 3436 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 3437 | || ABI_64_P (output_bfd)) |
d7921315 L |
3438 | howto = x86_64_elf_howto_table + r_type; |
3439 | else | |
3440 | howto = (x86_64_elf_howto_table | |
3441 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 3442 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
3443 | h = NULL; |
3444 | sym = NULL; | |
3445 | sec = NULL; | |
b34976b6 | 3446 | unresolved_reloc = FALSE; |
8d88c4ca | 3447 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
3448 | { |
3449 | sym = local_syms + r_symndx; | |
3450 | sec = local_sections[r_symndx]; | |
c434dee6 | 3451 | |
c25bc9fc L |
3452 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
3453 | &sec, rel); | |
1788fc08 | 3454 | st_size = sym->st_size; |
c25bc9fc L |
3455 | |
3456 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
1f85278f | 3457 | if (!info->relocatable |
351f65ca | 3458 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 3459 | { |
351f65ca L |
3460 | h = elf_x86_64_get_local_sym_hash (htab, input_bfd, |
3461 | rel, FALSE); | |
c25bc9fc L |
3462 | if (h == NULL) |
3463 | abort (); | |
3464 | ||
eed180f8 | 3465 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
3466 | h->root.u.def.value = sym->st_value; |
3467 | h->root.u.def.section = sec; | |
3468 | } | |
8da6118f | 3469 | } |
8d88c4ca | 3470 | else |
8da6118f | 3471 | { |
c9736ba0 | 3472 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 3473 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
c434dee6 | 3474 | |
b2a8e766 AM |
3475 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3476 | r_symndx, symtab_hdr, sym_hashes, | |
3477 | h, sec, relocation, | |
62d887d4 | 3478 | unresolved_reloc, warned, ignored); |
1788fc08 | 3479 | st_size = h->size; |
8da6118f | 3480 | } |
ab96bf03 | 3481 | |
dbaa2011 | 3482 | if (sec != NULL && discarded_section (sec)) |
0672748a | 3483 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 3484 | rel, 1, relend, howto, 0, contents); |
ab96bf03 AM |
3485 | |
3486 | if (info->relocatable) | |
3487 | continue; | |
3488 | ||
1788fc08 | 3489 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 3490 | { |
1788fc08 L |
3491 | if (r_type == R_X86_64_64) |
3492 | { | |
3493 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
3494 | zero-extend it to 64bit if addend is zero. */ | |
3495 | r_type = R_X86_64_32; | |
3496 | memset (contents + rel->r_offset + 4, 0, 4); | |
3497 | } | |
3498 | else if (r_type == R_X86_64_SIZE64) | |
3499 | { | |
3500 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
3501 | zero-extend it to 64bit if addend is zero. */ | |
3502 | r_type = R_X86_64_SIZE32; | |
3503 | memset (contents + rel->r_offset + 4, 0, 4); | |
3504 | } | |
64d25c44 L |
3505 | } |
3506 | ||
0ff2b86e L |
3507 | eh = (struct elf_x86_64_link_hash_entry *) h; |
3508 | ||
cbe950e9 L |
3509 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3510 | it here if it is defined in a non-shared object. */ | |
3511 | if (h != NULL | |
3512 | && h->type == STT_GNU_IFUNC | |
3513 | && h->def_regular) | |
3514 | { | |
cbe950e9 | 3515 | bfd_vma plt_index; |
4c544807 | 3516 | const char *name; |
cbe950e9 L |
3517 | |
3518 | if ((input_section->flags & SEC_ALLOC) == 0 | |
3519 | || h->plt.offset == (bfd_vma) -1) | |
3520 | abort (); | |
3521 | ||
3522 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
0ff2b86e L |
3523 | if (htab->elf.splt != NULL) |
3524 | { | |
3525 | if (htab->plt_bnd != NULL) | |
3526 | { | |
3527 | resolved_plt = htab->plt_bnd; | |
3528 | plt_offset = eh->plt_bnd.offset; | |
3529 | } | |
3530 | else | |
3531 | { | |
3532 | resolved_plt = htab->elf.splt; | |
3533 | plt_offset = h->plt.offset; | |
3534 | } | |
3535 | } | |
3536 | else | |
3537 | { | |
3538 | resolved_plt = htab->elf.iplt; | |
3539 | plt_offset = h->plt.offset; | |
3540 | } | |
3541 | ||
3542 | relocation = (resolved_plt->output_section->vma | |
3543 | + resolved_plt->output_offset + plt_offset); | |
cbe950e9 L |
3544 | |
3545 | switch (r_type) | |
3546 | { | |
3547 | default: | |
4c544807 L |
3548 | if (h->root.root.string) |
3549 | name = h->root.root.string; | |
3550 | else | |
3551 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
3552 | NULL); | |
cbe950e9 L |
3553 | (*_bfd_error_handler) |
3554 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
3555 | "symbol `%s' isn't handled by %s"), input_bfd, | |
3556 | x86_64_elf_howto_table[r_type].name, | |
4c544807 | 3557 | name, __FUNCTION__); |
cbe950e9 L |
3558 | bfd_set_error (bfd_error_bad_value); |
3559 | return FALSE; | |
3560 | ||
3561 | case R_X86_64_32S: | |
710ab287 | 3562 | if (info->shared) |
cbe950e9 | 3563 | abort (); |
710ab287 L |
3564 | goto do_relocation; |
3565 | ||
248775ba L |
3566 | case R_X86_64_32: |
3567 | if (ABI_64_P (output_bfd)) | |
3568 | goto do_relocation; | |
17672001 | 3569 | /* FALLTHROUGH */ |
eed180f8 | 3570 | case R_X86_64_64: |
710ab287 L |
3571 | if (rel->r_addend != 0) |
3572 | { | |
4c544807 L |
3573 | if (h->root.root.string) |
3574 | name = h->root.root.string; | |
3575 | else | |
3576 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3577 | sym, NULL); | |
710ab287 L |
3578 | (*_bfd_error_handler) |
3579 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
3580 | "symbol `%s' has non-zero addend: %d"), | |
3581 | input_bfd, x86_64_elf_howto_table[r_type].name, | |
4c544807 | 3582 | name, rel->r_addend); |
710ab287 L |
3583 | bfd_set_error (bfd_error_bad_value); |
3584 | return FALSE; | |
3585 | } | |
3586 | ||
3587 | /* Generate dynamic relcoation only when there is a | |
c293fa49 | 3588 | non-GOT reference in a shared object. */ |
710ab287 L |
3589 | if (info->shared && h->non_got_ref) |
3590 | { | |
3591 | Elf_Internal_Rela outrel; | |
710ab287 L |
3592 | asection *sreloc; |
3593 | ||
c25bc9fc L |
3594 | /* Need a dynamic relocation to get the real function |
3595 | address. */ | |
710ab287 L |
3596 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
3597 | info, | |
3598 | input_section, | |
3599 | rel->r_offset); | |
3600 | if (outrel.r_offset == (bfd_vma) -1 | |
3601 | || outrel.r_offset == (bfd_vma) -2) | |
3602 | abort (); | |
3603 | ||
3604 | outrel.r_offset += (input_section->output_section->vma | |
3605 | + input_section->output_offset); | |
3606 | ||
3607 | if (h->dynindx == -1 | |
44c4ea11 L |
3608 | || h->forced_local |
3609 | || info->executable) | |
710ab287 L |
3610 | { |
3611 | /* This symbol is resolved locally. */ | |
56b8aada L |
3612 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
3613 | outrel.r_addend = (h->root.u.def.value | |
3614 | + h->root.u.def.section->output_section->vma | |
3615 | + h->root.u.def.section->output_offset); | |
710ab287 L |
3616 | } |
3617 | else | |
3618 | { | |
351f65ca | 3619 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
3620 | outrel.r_addend = 0; |
3621 | } | |
3622 | ||
6de2ae4a | 3623 | sreloc = htab->elf.irelifunc; |
351f65ca | 3624 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
3625 | |
3626 | /* If this reloc is against an external symbol, we | |
3627 | do not want to fiddle with the addend. Otherwise, | |
3628 | we need to include the symbol value so that it | |
3629 | becomes an addend for the dynamic reloc. For an | |
3630 | internal symbol, we have updated addend. */ | |
56b8aada | 3631 | continue; |
710ab287 | 3632 | } |
17672001 | 3633 | /* FALLTHROUGH */ |
cbe950e9 | 3634 | case R_X86_64_PC32: |
c3320543 | 3635 | case R_X86_64_PC32_BND: |
cbe950e9 L |
3636 | case R_X86_64_PC64: |
3637 | case R_X86_64_PLT32: | |
c3320543 | 3638 | case R_X86_64_PLT32_BND: |
cbe950e9 L |
3639 | goto do_relocation; |
3640 | ||
3641 | case R_X86_64_GOTPCREL: | |
3642 | case R_X86_64_GOTPCREL64: | |
6de2ae4a | 3643 | base_got = htab->elf.sgot; |
cbe950e9 L |
3644 | off = h->got.offset; |
3645 | ||
7afd84dc | 3646 | if (base_got == NULL) |
cbe950e9 L |
3647 | abort (); |
3648 | ||
7afd84dc | 3649 | if (off == (bfd_vma) -1) |
cbe950e9 | 3650 | { |
7afd84dc L |
3651 | /* We can't use h->got.offset here to save state, or |
3652 | even just remember the offset, as finish_dynamic_symbol | |
3653 | would use that as offset into .got. */ | |
cbe950e9 | 3654 | |
6de2ae4a | 3655 | if (htab->elf.splt != NULL) |
7afd84dc | 3656 | { |
eed180f8 | 3657 | plt_index = h->plt.offset / plt_entry_size - 1; |
7afd84dc | 3658 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 3659 | base_got = htab->elf.sgotplt; |
7afd84dc | 3660 | } |
cbe950e9 L |
3661 | else |
3662 | { | |
eed180f8 | 3663 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 3664 | off = plt_index * GOT_ENTRY_SIZE; |
6de2ae4a | 3665 | base_got = htab->elf.igotplt; |
7afd84dc L |
3666 | } |
3667 | ||
3668 | if (h->dynindx == -1 | |
3669 | || h->forced_local | |
3670 | || info->symbolic) | |
3671 | { | |
eed180f8 | 3672 | /* This references the local defitionion. We must |
7afd84dc | 3673 | initialize this entry in the global offset table. |
eed180f8 | 3674 | Since the offset must always be a multiple of 8, |
7afd84dc L |
3675 | we use the least significant bit to record |
3676 | whether we have initialized it already. | |
3677 | ||
3678 | When doing a dynamic link, we create a .rela.got | |
3679 | relocation entry to initialize the value. This | |
3680 | is done in the finish_dynamic_symbol routine. */ | |
3681 | if ((off & 1) != 0) | |
3682 | off &= ~1; | |
3683 | else | |
3684 | { | |
3685 | bfd_put_64 (output_bfd, relocation, | |
3686 | base_got->contents + off); | |
3687 | /* Note that this is harmless for the GOTPLT64 | |
3688 | case, as -1 | 1 still is -1. */ | |
3689 | h->got.offset |= 1; | |
3690 | } | |
cbe950e9 L |
3691 | } |
3692 | } | |
3693 | ||
3694 | relocation = (base_got->output_section->vma | |
3695 | + base_got->output_offset + off); | |
3696 | ||
cbe950e9 L |
3697 | goto do_relocation; |
3698 | } | |
3699 | } | |
3700 | ||
70256ad8 AJ |
3701 | /* When generating a shared object, the relocations handled here are |
3702 | copied into the output file to be resolved at run time. */ | |
3703 | switch (r_type) | |
3704 | { | |
3705 | case R_X86_64_GOT32: | |
7b81dfbb | 3706 | case R_X86_64_GOT64: |
70256ad8 AJ |
3707 | /* Relocation is to the entry for this symbol in the global |
3708 | offset table. */ | |
70256ad8 | 3709 | case R_X86_64_GOTPCREL: |
7b81dfbb AJ |
3710 | case R_X86_64_GOTPCREL64: |
3711 | /* Use global offset table entry as symbol value. */ | |
3712 | case R_X86_64_GOTPLT64: | |
553d1284 | 3713 | /* This is obsolete and treated the the same as GOT64. */ |
6de2ae4a | 3714 | base_got = htab->elf.sgot; |
7b81dfbb | 3715 | |
6de2ae4a | 3716 | if (htab->elf.sgot == NULL) |
c434dee6 | 3717 | abort (); |
053579d7 | 3718 | |
51e0a107 | 3719 | if (h != NULL) |
70256ad8 | 3720 | { |
b34976b6 | 3721 | bfd_boolean dyn; |
c434dee6 AJ |
3722 | |
3723 | off = h->got.offset; | |
7b81dfbb | 3724 | if (h->needs_plt |
eed180f8 | 3725 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
3726 | && off == (bfd_vma)-1) |
3727 | { | |
3728 | /* We can't use h->got.offset here to save | |
3729 | state, or even just remember the offset, as | |
3730 | finish_dynamic_symbol would use that as offset into | |
3731 | .got. */ | |
eed180f8 | 3732 | bfd_vma plt_index = h->plt.offset / plt_entry_size - 1; |
7b81dfbb | 3733 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 3734 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
3735 | } |
3736 | ||
c434dee6 | 3737 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 3738 | |
27482721 | 3739 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
51e0a107 | 3740 | || (info->shared |
27482721 | 3741 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
3742 | || (ELF_ST_VISIBILITY (h->other) |
3743 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
3744 | { |
3745 | /* This is actually a static link, or it is a -Bsymbolic | |
3746 | link and the symbol is defined locally, or the symbol | |
407443a3 | 3747 | was forced to be local because of a version file. We |
51e0a107 JH |
3748 | must initialize this entry in the global offset table. |
3749 | Since the offset must always be a multiple of 8, we | |
3750 | use the least significant bit to record whether we | |
3751 | have initialized it already. | |
3752 | ||
3753 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
3754 | relocation entry to initialize the value. This is |
3755 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
3756 | if ((off & 1) != 0) |
3757 | off &= ~1; | |
3758 | else | |
3759 | { | |
3760 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
3761 | base_got->contents + off); |
3762 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 3763 | as -1 | 1 still is -1. */ |
51e0a107 JH |
3764 | h->got.offset |= 1; |
3765 | } | |
3766 | } | |
053579d7 | 3767 | else |
b34976b6 | 3768 | unresolved_reloc = FALSE; |
70256ad8 | 3769 | } |
51e0a107 JH |
3770 | else |
3771 | { | |
c434dee6 AJ |
3772 | if (local_got_offsets == NULL) |
3773 | abort (); | |
51e0a107 JH |
3774 | |
3775 | off = local_got_offsets[r_symndx]; | |
3776 | ||
3777 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
3778 | the least significant bit to record whether we have |
3779 | already generated the necessary reloc. */ | |
51e0a107 JH |
3780 | if ((off & 1) != 0) |
3781 | off &= ~1; | |
3782 | else | |
3783 | { | |
c434dee6 | 3784 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 3785 | base_got->contents + off); |
51e0a107 JH |
3786 | |
3787 | if (info->shared) | |
3788 | { | |
947216bf | 3789 | asection *s; |
51e0a107 | 3790 | Elf_Internal_Rela outrel; |
70256ad8 | 3791 | |
51e0a107 JH |
3792 | /* We need to generate a R_X86_64_RELATIVE reloc |
3793 | for the dynamic linker. */ | |
6de2ae4a | 3794 | s = htab->elf.srelgot; |
947216bf | 3795 | if (s == NULL) |
c434dee6 | 3796 | abort (); |
51e0a107 | 3797 | |
7b81dfbb AJ |
3798 | outrel.r_offset = (base_got->output_section->vma |
3799 | + base_got->output_offset | |
51e0a107 | 3800 | + off); |
351f65ca | 3801 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
51e0a107 | 3802 | outrel.r_addend = relocation; |
351f65ca | 3803 | elf_append_rela (output_bfd, s, &outrel); |
51e0a107 JH |
3804 | } |
3805 | ||
3806 | local_got_offsets[r_symndx] |= 1; | |
3807 | } | |
51e0a107 | 3808 | } |
6a2bda3f | 3809 | |
c434dee6 AJ |
3810 | if (off >= (bfd_vma) -2) |
3811 | abort (); | |
3812 | ||
7b81dfbb AJ |
3813 | relocation = base_got->output_section->vma |
3814 | + base_got->output_offset + off; | |
3815 | if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
3816 | relocation -= htab->elf.sgotplt->output_section->vma |
3817 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 3818 | |
70256ad8 AJ |
3819 | break; |
3820 | ||
d6ab8113 JB |
3821 | case R_X86_64_GOTOFF64: |
3822 | /* Relocation is relative to the start of the global offset | |
3823 | table. */ | |
3824 | ||
3825 | /* Check to make sure it isn't a protected function symbol | |
3826 | for shared library since it may not be local when used | |
3827 | as function address. */ | |
bdb892b9 | 3828 | if (!info->executable |
d6ab8113 | 3829 | && h |
bdb892b9 | 3830 | && !SYMBOLIC_BIND (info, h) |
d6ab8113 JB |
3831 | && h->def_regular |
3832 | && h->type == STT_FUNC | |
3833 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
3834 | { | |
3835 | (*_bfd_error_handler) | |
3836 | (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"), | |
3837 | input_bfd, h->root.root.string); | |
3838 | bfd_set_error (bfd_error_bad_value); | |
3839 | return FALSE; | |
3840 | } | |
3841 | ||
3842 | /* Note that sgot is not involved in this | |
3843 | calculation. We always want the start of .got.plt. If we | |
3844 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
3845 | permitted by the ABI, we might have to change this | |
3846 | calculation. */ | |
6de2ae4a L |
3847 | relocation -= htab->elf.sgotplt->output_section->vma |
3848 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3849 | break; |
3850 | ||
3851 | case R_X86_64_GOTPC32: | |
7b81dfbb | 3852 | case R_X86_64_GOTPC64: |
d6ab8113 | 3853 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
3854 | relocation = htab->elf.sgotplt->output_section->vma |
3855 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3856 | unresolved_reloc = FALSE; |
3857 | break; | |
7b81dfbb AJ |
3858 | |
3859 | case R_X86_64_PLTOFF64: | |
3860 | /* Relocation is PLT entry relative to GOT. For local | |
3861 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 3862 | if (h != NULL |
7b81dfbb AJ |
3863 | /* See PLT32 handling. */ |
3864 | && h->plt.offset != (bfd_vma) -1 | |
6de2ae4a | 3865 | && htab->elf.splt != NULL) |
7b81dfbb | 3866 | { |
0ff2b86e L |
3867 | if (htab->plt_bnd != NULL) |
3868 | { | |
3869 | resolved_plt = htab->plt_bnd; | |
3870 | plt_offset = eh->plt_bnd.offset; | |
3871 | } | |
3872 | else | |
3873 | { | |
3874 | resolved_plt = htab->elf.splt; | |
3875 | plt_offset = h->plt.offset; | |
3876 | } | |
3877 | ||
3878 | relocation = (resolved_plt->output_section->vma | |
3879 | + resolved_plt->output_offset | |
3880 | + plt_offset); | |
7b81dfbb AJ |
3881 | unresolved_reloc = FALSE; |
3882 | } | |
3883 | ||
6de2ae4a L |
3884 | relocation -= htab->elf.sgotplt->output_section->vma |
3885 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 3886 | break; |
d6ab8113 | 3887 | |
70256ad8 | 3888 | case R_X86_64_PLT32: |
c3320543 | 3889 | case R_X86_64_PLT32_BND: |
70256ad8 AJ |
3890 | /* Relocation is to the entry for this symbol in the |
3891 | procedure linkage table. */ | |
3892 | ||
3893 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 3894 | without using the procedure linkage table. */ |
70256ad8 AJ |
3895 | if (h == NULL) |
3896 | break; | |
3897 | ||
c434dee6 | 3898 | if (h->plt.offset == (bfd_vma) -1 |
6de2ae4a | 3899 | || htab->elf.splt == NULL) |
70256ad8 AJ |
3900 | { |
3901 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
3902 | happens when statically linking PIC code, or when |
3903 | using -Bsymbolic. */ | |
70256ad8 AJ |
3904 | break; |
3905 | } | |
3906 | ||
0ff2b86e L |
3907 | if (htab->plt_bnd != NULL) |
3908 | { | |
3909 | resolved_plt = htab->plt_bnd; | |
3910 | plt_offset = eh->plt_bnd.offset; | |
3911 | } | |
3912 | else | |
3913 | { | |
3914 | resolved_plt = htab->elf.splt; | |
3915 | plt_offset = h->plt.offset; | |
3916 | } | |
3917 | ||
3918 | relocation = (resolved_plt->output_section->vma | |
3919 | + resolved_plt->output_offset | |
3920 | + plt_offset); | |
b34976b6 | 3921 | unresolved_reloc = FALSE; |
70256ad8 AJ |
3922 | break; |
3923 | ||
1788fc08 L |
3924 | case R_X86_64_SIZE32: |
3925 | case R_X86_64_SIZE64: | |
1788fc08 L |
3926 | /* Set to symbol size. */ |
3927 | relocation = st_size; | |
3928 | goto direct; | |
3929 | ||
fd8ab9e5 AJ |
3930 | case R_X86_64_PC8: |
3931 | case R_X86_64_PC16: | |
3932 | case R_X86_64_PC32: | |
c3320543 | 3933 | case R_X86_64_PC32_BND: |
6610a52d | 3934 | if (info->shared |
ba3bee0b | 3935 | && (input_section->flags & SEC_ALLOC) != 0 |
90f487df | 3936 | && (input_section->flags & SEC_READONLY) != 0 |
41bed6dd | 3937 | && h != NULL) |
6610a52d | 3938 | { |
41bed6dd L |
3939 | bfd_boolean fail = FALSE; |
3940 | bfd_boolean branch | |
c3320543 L |
3941 | = ((r_type == R_X86_64_PC32 |
3942 | || r_type == R_X86_64_PC32_BND) | |
41bed6dd L |
3943 | && is_32bit_relative_branch (contents, rel->r_offset)); |
3944 | ||
3945 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
3946 | { | |
3947 | /* Symbol is referenced locally. Make sure it is | |
3948 | defined locally or for a branch. */ | |
3949 | fail = !h->def_regular && !branch; | |
3950 | } | |
90f487df | 3951 | else |
41bed6dd L |
3952 | { |
3953 | /* Symbol isn't referenced locally. We only allow | |
3954 | branch to symbol with non-default visibility. */ | |
3955 | fail = (!branch | |
3956 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
3957 | } | |
3958 | ||
3959 | if (fail) | |
3960 | { | |
3961 | const char *fmt; | |
3962 | const char *v; | |
3963 | const char *pic = ""; | |
3964 | ||
3965 | switch (ELF_ST_VISIBILITY (h->other)) | |
3966 | { | |
3967 | case STV_HIDDEN: | |
3968 | v = _("hidden symbol"); | |
3969 | break; | |
3970 | case STV_INTERNAL: | |
3971 | v = _("internal symbol"); | |
3972 | break; | |
3973 | case STV_PROTECTED: | |
3974 | v = _("protected symbol"); | |
3975 | break; | |
3976 | default: | |
3977 | v = _("symbol"); | |
3978 | pic = _("; recompile with -fPIC"); | |
3979 | break; | |
3980 | } | |
3981 | ||
3982 | if (h->def_regular) | |
3983 | fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s"); | |
3984 | else | |
3985 | fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s"); | |
3986 | ||
3987 | (*_bfd_error_handler) (fmt, input_bfd, | |
3988 | x86_64_elf_howto_table[r_type].name, | |
3989 | v, h->root.root.string, pic); | |
3990 | bfd_set_error (bfd_error_bad_value); | |
3991 | return FALSE; | |
3992 | } | |
6610a52d L |
3993 | } |
3994 | /* Fall through. */ | |
3995 | ||
70256ad8 AJ |
3996 | case R_X86_64_8: |
3997 | case R_X86_64_16: | |
3998 | case R_X86_64_32: | |
d6ab8113 | 3999 | case R_X86_64_PC64: |
6b3db546 | 4000 | case R_X86_64_64: |
80643fbc | 4001 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 4002 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 4003 | |
1788fc08 | 4004 | direct: |
b1e24c02 | 4005 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
4006 | break; |
4007 | ||
4008 | if ((info->shared | |
4bc6e03a AJ |
4009 | && (h == NULL |
4010 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
4011 | || h->root.type != bfd_link_hash_undefweak) | |
1788fc08 L |
4012 | && ((! IS_X86_64_PCREL_TYPE (r_type) |
4013 | && r_type != R_X86_64_SIZE32 | |
4014 | && r_type != R_X86_64_SIZE64) | |
d8045f23 | 4015 | || ! SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c AJ |
4016 | || (ELIMINATE_COPY_RELOCS |
4017 | && !info->shared | |
c434dee6 AJ |
4018 | && h != NULL |
4019 | && h->dynindx != -1 | |
f5385ebf AM |
4020 | && !h->non_got_ref |
4021 | && ((h->def_dynamic | |
4022 | && !h->def_regular) | |
c434dee6 | 4023 | || h->root.type == bfd_link_hash_undefweak |
0f88be7a | 4024 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
4025 | { |
4026 | Elf_Internal_Rela outrel; | |
b34976b6 | 4027 | bfd_boolean skip, relocate; |
c434dee6 | 4028 | asection *sreloc; |
70256ad8 AJ |
4029 | |
4030 | /* When generating a shared object, these relocations | |
4031 | are copied into the output file to be resolved at run | |
407443a3 | 4032 | time. */ |
b34976b6 AM |
4033 | skip = FALSE; |
4034 | relocate = FALSE; | |
70256ad8 | 4035 | |
c629eae0 JJ |
4036 | outrel.r_offset = |
4037 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 4038 | rel->r_offset); |
c629eae0 | 4039 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 4040 | skip = TRUE; |
0fb19cbc | 4041 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 4042 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
4043 | |
4044 | outrel.r_offset += (input_section->output_section->vma | |
4045 | + input_section->output_offset); | |
4046 | ||
4047 | if (skip) | |
0bb2d96a | 4048 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 4049 | |
fd8ab9e5 AJ |
4050 | /* h->dynindx may be -1 if this symbol was marked to |
4051 | become local. */ | |
4052 | else if (h != NULL | |
c434dee6 | 4053 | && h->dynindx != -1 |
d8045f23 NC |
4054 | && (IS_X86_64_PCREL_TYPE (r_type) |
4055 | || ! info->shared | |
4056 | || ! SYMBOLIC_BIND (info, h) | |
4057 | || ! h->def_regular)) | |
70256ad8 | 4058 | { |
351f65ca | 4059 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 4060 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
4061 | } |
4062 | else | |
4063 | { | |
c434dee6 | 4064 | /* This symbol is local, or marked to become local. */ |
248775ba | 4065 | if (r_type == htab->pointer_r_type) |
607c0e09 | 4066 | { |
b34976b6 | 4067 | relocate = TRUE; |
351f65ca | 4068 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
4069 | outrel.r_addend = relocation + rel->r_addend; |
4070 | } | |
64d25c44 L |
4071 | else if (r_type == R_X86_64_64 |
4072 | && !ABI_64_P (output_bfd)) | |
4073 | { | |
4074 | relocate = TRUE; | |
4075 | outrel.r_info = htab->r_info (0, | |
4076 | R_X86_64_RELATIVE64); | |
4077 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
4078 | /* Check addend overflow. */ |
4079 | if ((outrel.r_addend & 0x80000000) | |
4080 | != (rel->r_addend & 0x80000000)) | |
4081 | { | |
4082 | const char *name; | |
268a8d3a | 4083 | int addend = rel->r_addend; |
8cf0d2dd L |
4084 | if (h && h->root.root.string) |
4085 | name = h->root.root.string; | |
4086 | else | |
4087 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
4088 | sym, NULL); | |
6f2c9068 L |
4089 | if (addend < 0) |
4090 | (*_bfd_error_handler) | |
268a8d3a | 4091 | (_("%B: addend -0x%x in relocation %s against " |
6f2c9068 L |
4092 | "symbol `%s' at 0x%lx in section `%A' is " |
4093 | "out of range"), | |
4094 | input_bfd, input_section, addend, | |
4095 | x86_64_elf_howto_table[r_type].name, | |
4096 | name, (unsigned long) rel->r_offset); | |
4097 | else | |
4098 | (*_bfd_error_handler) | |
268a8d3a | 4099 | (_("%B: addend 0x%x in relocation %s against " |
6f2c9068 L |
4100 | "symbol `%s' at 0x%lx in section `%A' is " |
4101 | "out of range"), | |
4102 | input_bfd, input_section, addend, | |
4103 | x86_64_elf_howto_table[r_type].name, | |
4104 | name, (unsigned long) rel->r_offset); | |
8cf0d2dd L |
4105 | bfd_set_error (bfd_error_bad_value); |
4106 | return FALSE; | |
4107 | } | |
64d25c44 | 4108 | } |
607c0e09 AS |
4109 | else |
4110 | { | |
4111 | long sindx; | |
4112 | ||
8517fae7 | 4113 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
4114 | sindx = 0; |
4115 | else if (sec == NULL || sec->owner == NULL) | |
4116 | { | |
4117 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 4118 | return FALSE; |
607c0e09 AS |
4119 | } |
4120 | else | |
4121 | { | |
4122 | asection *osec; | |
4123 | ||
74541ad4 AM |
4124 | /* We are turning this relocation into one |
4125 | against a section symbol. It would be | |
4126 | proper to subtract the symbol's value, | |
4127 | osec->vma, from the emitted reloc addend, | |
4128 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
4129 | osec = sec->output_section; |
4130 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
4131 | if (sindx == 0) |
4132 | { | |
4133 | asection *oi = htab->elf.text_index_section; | |
4134 | sindx = elf_section_data (oi)->dynindx; | |
4135 | } | |
4136 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
4137 | } |
4138 | ||
351f65ca | 4139 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
4140 | outrel.r_addend = relocation + rel->r_addend; |
4141 | } | |
70256ad8 AJ |
4142 | } |
4143 | ||
cbe950e9 | 4144 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 4145 | |
62d78908 L |
4146 | if (sreloc == NULL || sreloc->contents == NULL) |
4147 | { | |
4148 | r = bfd_reloc_notsupported; | |
4149 | goto check_relocation_error; | |
4150 | } | |
c434dee6 | 4151 | |
351f65ca | 4152 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
4153 | |
4154 | /* If this reloc is against an external symbol, we do | |
4155 | not want to fiddle with the addend. Otherwise, we | |
4156 | need to include the symbol value so that it becomes | |
4157 | an addend for the dynamic reloc. */ | |
0f88be7a | 4158 | if (! relocate) |
70256ad8 AJ |
4159 | continue; |
4160 | } | |
4161 | ||
4162 | break; | |
4163 | ||
bffbf940 | 4164 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
4165 | case R_X86_64_GOTPC32_TLSDESC: |
4166 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 4167 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
4168 | tls_type = GOT_UNKNOWN; |
4169 | if (h == NULL && local_got_offsets) | |
351f65ca | 4170 | tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 4171 | else if (h != NULL) |
351f65ca | 4172 | tls_type = elf_x86_64_hash_entry (h)->tls_type; |
142411ca | 4173 | |
351f65ca L |
4174 | if (! elf_x86_64_tls_transition (info, input_bfd, |
4175 | input_section, contents, | |
4176 | symtab_hdr, sym_hashes, | |
4177 | &r_type, tls_type, rel, | |
4178 | relend, h, r_symndx)) | |
534a31f6 | 4179 | return FALSE; |
bffbf940 JJ |
4180 | |
4181 | if (r_type == R_X86_64_TPOFF32) | |
4182 | { | |
142411ca L |
4183 | bfd_vma roff = rel->r_offset; |
4184 | ||
bffbf940 | 4185 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 4186 | |
351f65ca | 4187 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 4188 | { |
52bc799a | 4189 | /* GD->LE transition. For 64bit, change |
abcf1d52 | 4190 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
a3fadc9a | 4191 | .word 0x6666; rex64; call __tls_get_addr |
52bc799a | 4192 | into: |
bffbf940 | 4193 | movq %fs:0, %rax |
52bc799a L |
4194 | leaq foo@tpoff(%rax), %rax |
4195 | For 32bit, change | |
4196 | leaq foo@tlsgd(%rip), %rdi | |
4197 | .word 0x6666; rex64; call __tls_get_addr | |
4198 | into: | |
4199 | movl %fs:0, %eax | |
5c98a14e JJ |
4200 | leaq foo@tpoff(%rax), %rax |
4201 | For largepic, change: | |
4202 | leaq foo@tlsgd(%rip), %rdi | |
4203 | movabsq $__tls_get_addr@pltoff, %rax | |
4204 | addq %rbx, %rax | |
4205 | call *%rax | |
4206 | into: | |
4207 | movq %fs:0, %rax | |
4208 | leaq foo@tpoff(%rax), %rax | |
4209 | nopw 0x0(%rax,%rax,1) */ | |
4210 | int largepic = 0; | |
4211 | if (ABI_64_P (output_bfd) | |
4212 | && contents[roff + 5] == (bfd_byte) '\xb8') | |
4213 | { | |
4214 | memcpy (contents + roff - 3, | |
4215 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80" | |
4216 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
4217 | largepic = 1; | |
4218 | } | |
4219 | else if (ABI_64_P (output_bfd)) | |
52bc799a L |
4220 | memcpy (contents + roff - 4, |
4221 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
4222 | 16); | |
4223 | else | |
4224 | memcpy (contents + roff - 3, | |
4225 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
4226 | 15); | |
eb4ff4d6 | 4227 | bfd_put_32 (output_bfd, |
351f65ca | 4228 | elf_x86_64_tpoff (info, relocation), |
5c98a14e JJ |
4229 | contents + roff + 8 + largepic); |
4230 | /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
bffbf940 JJ |
4231 | rel++; |
4232 | continue; | |
4233 | } | |
351f65ca | 4234 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
4235 | { |
4236 | /* GDesc -> LE transition. | |
4237 | It's originally something like: | |
4238 | leaq x@tlsdesc(%rip), %rax | |
4239 | ||
4240 | Change it to: | |
c9736ba0 | 4241 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 4242 | |
c9736ba0 | 4243 | unsigned int val, type; |
67a4f2b7 | 4244 | |
67a4f2b7 | 4245 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 4246 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
4247 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
4248 | contents + roff - 3); | |
4249 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
4250 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4251 | contents + roff - 1); | |
eb4ff4d6 | 4252 | bfd_put_32 (output_bfd, |
351f65ca | 4253 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
4254 | contents + roff); |
4255 | continue; | |
4256 | } | |
351f65ca | 4257 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
4258 | { |
4259 | /* GDesc -> LE transition. | |
4260 | It's originally: | |
4261 | call *(%rax) | |
4262 | Turn it into: | |
142411ca | 4263 | xchg %ax,%ax. */ |
10efb593 | 4264 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
4265 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4266 | continue; | |
4267 | } | |
351f65ca | 4268 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 4269 | { |
bffbf940 | 4270 | /* IE->LE transition: |
cf61b747 | 4271 | For 64bit, originally it can be one of: |
bffbf940 JJ |
4272 | movq foo@gottpoff(%rip), %reg |
4273 | addq foo@gottpoff(%rip), %reg | |
4274 | We change it into: | |
4275 | movq $foo, %reg | |
4276 | leaq foo(%reg), %reg | |
cf61b747 L |
4277 | addq $foo, %reg. |
4278 | For 32bit, originally it can be one of: | |
4279 | movq foo@gottpoff(%rip), %reg | |
4280 | addl foo@gottpoff(%rip), %reg | |
4281 | We change it into: | |
4282 | movq $foo, %reg | |
4283 | leal foo(%reg), %reg | |
4284 | addl $foo, %reg. */ | |
142411ca L |
4285 | |
4286 | unsigned int val, type, reg; | |
4287 | ||
cf61b747 L |
4288 | if (roff >= 3) |
4289 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
4290 | else | |
4291 | val = 0; | |
142411ca L |
4292 | type = bfd_get_8 (input_bfd, contents + roff - 2); |
4293 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 4294 | reg >>= 3; |
bffbf940 JJ |
4295 | if (type == 0x8b) |
4296 | { | |
4297 | /* movq */ | |
4298 | if (val == 0x4c) | |
4299 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 4300 | contents + roff - 3); |
4a4c5f25 L |
4301 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4302 | bfd_put_8 (output_bfd, 0x41, | |
4303 | contents + roff - 3); | |
bffbf940 | 4304 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 4305 | contents + roff - 2); |
bffbf940 | 4306 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 4307 | contents + roff - 1); |
bffbf940 JJ |
4308 | } |
4309 | else if (reg == 4) | |
4310 | { | |
cf61b747 L |
4311 | /* addq/addl -> addq/addl - addressing with %rsp/%r12 |
4312 | is special */ | |
bffbf940 JJ |
4313 | if (val == 0x4c) |
4314 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 4315 | contents + roff - 3); |
4a4c5f25 L |
4316 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4317 | bfd_put_8 (output_bfd, 0x41, | |
4318 | contents + roff - 3); | |
bffbf940 | 4319 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 4320 | contents + roff - 2); |
bffbf940 | 4321 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 4322 | contents + roff - 1); |
bffbf940 JJ |
4323 | } |
4324 | else | |
4325 | { | |
cf61b747 | 4326 | /* addq/addl -> leaq/leal */ |
bffbf940 JJ |
4327 | if (val == 0x4c) |
4328 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 4329 | contents + roff - 3); |
4a4c5f25 L |
4330 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4331 | bfd_put_8 (output_bfd, 0x45, | |
4332 | contents + roff - 3); | |
bffbf940 | 4333 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 4334 | contents + roff - 2); |
bffbf940 | 4335 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 4336 | contents + roff - 1); |
bffbf940 | 4337 | } |
eb4ff4d6 | 4338 | bfd_put_32 (output_bfd, |
351f65ca | 4339 | elf_x86_64_tpoff (info, relocation), |
142411ca | 4340 | contents + roff); |
bffbf940 JJ |
4341 | continue; |
4342 | } | |
142411ca L |
4343 | else |
4344 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
4345 | } |
4346 | ||
6de2ae4a | 4347 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
4348 | abort (); |
4349 | ||
4350 | if (h != NULL) | |
67a4f2b7 AO |
4351 | { |
4352 | off = h->got.offset; | |
351f65ca | 4353 | offplt = elf_x86_64_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 4354 | } |
bffbf940 JJ |
4355 | else |
4356 | { | |
4357 | if (local_got_offsets == NULL) | |
4358 | abort (); | |
4359 | ||
4360 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 4361 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
4362 | } |
4363 | ||
4364 | if ((off & 1) != 0) | |
4365 | off &= ~1; | |
26e41594 | 4366 | else |
bffbf940 JJ |
4367 | { |
4368 | Elf_Internal_Rela outrel; | |
bffbf940 | 4369 | int dr_type, indx; |
67a4f2b7 | 4370 | asection *sreloc; |
bffbf940 | 4371 | |
6de2ae4a | 4372 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
4373 | abort (); |
4374 | ||
67a4f2b7 AO |
4375 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4376 | ||
4377 | if (GOT_TLS_GDESC_P (tls_type)) | |
4378 | { | |
351f65ca | 4379 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 4380 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
4381 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
4382 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4383 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4384 | + offplt |
4385 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4386 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4387 | if (indx == 0) |
351f65ca | 4388 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
67a4f2b7 AO |
4389 | else |
4390 | outrel.r_addend = 0; | |
351f65ca | 4391 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
4392 | } |
4393 | ||
6de2ae4a | 4394 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4395 | |
6de2ae4a L |
4396 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4397 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 4398 | |
67a4f2b7 | 4399 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 4400 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
4401 | else if (GOT_TLS_GDESC_P (tls_type)) |
4402 | goto dr_done; | |
bffbf940 JJ |
4403 | else |
4404 | dr_type = R_X86_64_TPOFF64; | |
4405 | ||
6de2ae4a | 4406 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 4407 | outrel.r_addend = 0; |
67a4f2b7 AO |
4408 | if ((dr_type == R_X86_64_TPOFF64 |
4409 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
351f65ca L |
4410 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
4411 | outrel.r_info = htab->r_info (indx, dr_type); | |
bffbf940 | 4412 | |
351f65ca | 4413 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 4414 | |
67a4f2b7 | 4415 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
4416 | { |
4417 | if (indx == 0) | |
4418 | { | |
d40d037c | 4419 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 4420 | bfd_put_64 (output_bfd, |
351f65ca | 4421 | relocation - elf_x86_64_dtpoff_base (info), |
6de2ae4a | 4422 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
4423 | } |
4424 | else | |
4425 | { | |
4426 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 4427 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 4428 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
4429 | R_X86_64_DTPOFF64); |
4430 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 4431 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 4432 | &outrel); |
bffbf940 JJ |
4433 | } |
4434 | } | |
4435 | ||
67a4f2b7 | 4436 | dr_done: |
bffbf940 JJ |
4437 | if (h != NULL) |
4438 | h->got.offset |= 1; | |
4439 | else | |
4440 | local_got_offsets[r_symndx] |= 1; | |
4441 | } | |
4442 | ||
67a4f2b7 AO |
4443 | if (off >= (bfd_vma) -2 |
4444 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 4445 | abort (); |
351f65ca | 4446 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 4447 | { |
67a4f2b7 AO |
4448 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
4449 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
4450 | relocation = htab->elf.sgotplt->output_section->vma |
4451 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4452 | + offplt + htab->sgotplt_jump_table_size; |
4453 | else | |
6de2ae4a L |
4454 | relocation = htab->elf.sgot->output_section->vma |
4455 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 4456 | unresolved_reloc = FALSE; |
bffbf940 | 4457 | } |
142411ca | 4458 | else |
67a4f2b7 | 4459 | { |
142411ca | 4460 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 4461 | |
351f65ca | 4462 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 4463 | { |
52bc799a | 4464 | /* GD->IE transition. For 64bit, change |
142411ca L |
4465 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
4466 | .word 0x6666; rex64; call __tls_get_addr@plt | |
52bc799a | 4467 | into: |
142411ca | 4468 | movq %fs:0, %rax |
52bc799a L |
4469 | addq foo@gottpoff(%rip), %rax |
4470 | For 32bit, change | |
4471 | leaq foo@tlsgd(%rip), %rdi | |
4472 | .word 0x6666; rex64; call __tls_get_addr@plt | |
4473 | into: | |
4474 | movl %fs:0, %eax | |
5c98a14e JJ |
4475 | addq foo@gottpoff(%rip), %rax |
4476 | For largepic, change: | |
4477 | leaq foo@tlsgd(%rip), %rdi | |
4478 | movabsq $__tls_get_addr@pltoff, %rax | |
4479 | addq %rbx, %rax | |
4480 | call *%rax | |
4481 | into: | |
4482 | movq %fs:0, %rax | |
4483 | addq foo@gottpoff(%rax), %rax | |
4484 | nopw 0x0(%rax,%rax,1) */ | |
4485 | int largepic = 0; | |
4486 | if (ABI_64_P (output_bfd) | |
4487 | && contents[roff + 5] == (bfd_byte) '\xb8') | |
4488 | { | |
4489 | memcpy (contents + roff - 3, | |
4490 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05" | |
4491 | "\0\0\0\0\x66\x0f\x1f\x44\0", 22); | |
4492 | largepic = 1; | |
4493 | } | |
4494 | else if (ABI_64_P (output_bfd)) | |
52bc799a L |
4495 | memcpy (contents + roff - 4, |
4496 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
4497 | 16); | |
4498 | else | |
4499 | memcpy (contents + roff - 3, | |
4500 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
4501 | 15); | |
142411ca | 4502 | |
6de2ae4a L |
4503 | relocation = (htab->elf.sgot->output_section->vma |
4504 | + htab->elf.sgot->output_offset + off | |
142411ca | 4505 | - roff |
5c98a14e | 4506 | - largepic |
142411ca L |
4507 | - input_section->output_section->vma |
4508 | - input_section->output_offset | |
4509 | - 12); | |
4510 | bfd_put_32 (output_bfd, relocation, | |
5c98a14e JJ |
4511 | contents + roff + 8 + largepic); |
4512 | /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */ | |
142411ca L |
4513 | rel++; |
4514 | continue; | |
4515 | } | |
351f65ca | 4516 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
4517 | { |
4518 | /* GDesc -> IE transition. | |
4519 | It's originally something like: | |
4520 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 4521 | |
142411ca | 4522 | Change it to: |
c9736ba0 | 4523 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 4524 | |
142411ca L |
4525 | /* Now modify the instruction as appropriate. To |
4526 | turn a leaq into a movq in the form we use it, it | |
4527 | suffices to change the second byte from 0x8d to | |
4528 | 0x8b. */ | |
4529 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
4530 | ||
4531 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4532 | htab->elf.sgot->output_section->vma |
4533 | + htab->elf.sgot->output_offset + off | |
142411ca L |
4534 | - rel->r_offset |
4535 | - input_section->output_section->vma | |
4536 | - input_section->output_offset | |
4537 | - 4, | |
4538 | contents + roff); | |
4539 | continue; | |
4540 | } | |
351f65ca | 4541 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
4542 | { |
4543 | /* GDesc -> IE transition. | |
4544 | It's originally: | |
4545 | call *(%rax) | |
4546 | ||
4547 | Change it to: | |
c9736ba0 | 4548 | xchg %ax, %ax. */ |
142411ca | 4549 | |
142411ca L |
4550 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
4551 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
4552 | continue; | |
4553 | } | |
4554 | else | |
4555 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 4556 | } |
bffbf940 JJ |
4557 | break; |
4558 | ||
4559 | case R_X86_64_TLSLD: | |
351f65ca L |
4560 | if (! elf_x86_64_tls_transition (info, input_bfd, |
4561 | input_section, contents, | |
4562 | symtab_hdr, sym_hashes, | |
4563 | &r_type, GOT_UNKNOWN, | |
4564 | rel, relend, h, r_symndx)) | |
142411ca | 4565 | return FALSE; |
a3fadc9a | 4566 | |
142411ca L |
4567 | if (r_type != R_X86_64_TLSLD) |
4568 | { | |
bffbf940 | 4569 | /* LD->LE transition: |
a3fadc9a | 4570 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr. |
52bc799a L |
4571 | For 64bit, we change it into: |
4572 | .word 0x6666; .byte 0x66; movq %fs:0, %rax. | |
4573 | For 32bit, we change it into: | |
5c98a14e JJ |
4574 | nopl 0x0(%rax); movl %fs:0, %eax. |
4575 | For largepic, change: | |
4576 | leaq foo@tlsgd(%rip), %rdi | |
4577 | movabsq $__tls_get_addr@pltoff, %rax | |
4578 | addq %rbx, %rax | |
4579 | call *%rax | |
4580 | into: | |
4581 | data32 data32 data32 nopw %cs:0x0(%rax,%rax,1) | |
4582 | movq %fs:0, %eax */ | |
142411ca L |
4583 | |
4584 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
5c98a14e JJ |
4585 | if (ABI_64_P (output_bfd) |
4586 | && contents[rel->r_offset + 5] == (bfd_byte) '\xb8') | |
4587 | memcpy (contents + rel->r_offset - 3, | |
4588 | "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0" | |
4589 | "\x64\x48\x8b\x04\x25\0\0\0", 22); | |
4590 | else if (ABI_64_P (output_bfd)) | |
52bc799a L |
4591 | memcpy (contents + rel->r_offset - 3, |
4592 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
4593 | else | |
4594 | memcpy (contents + rel->r_offset - 3, | |
4595 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
5c98a14e | 4596 | /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */ |
bffbf940 JJ |
4597 | rel++; |
4598 | continue; | |
4599 | } | |
4600 | ||
6de2ae4a | 4601 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
4602 | abort (); |
4603 | ||
4604 | off = htab->tls_ld_got.offset; | |
4605 | if (off & 1) | |
4606 | off &= ~1; | |
4607 | else | |
4608 | { | |
4609 | Elf_Internal_Rela outrel; | |
bffbf940 | 4610 | |
6de2ae4a | 4611 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
4612 | abort (); |
4613 | ||
6de2ae4a L |
4614 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4615 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
4616 | |
4617 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 4618 | htab->elf.sgot->contents + off); |
bffbf940 | 4619 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 4620 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 4621 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 4622 | outrel.r_addend = 0; |
351f65ca | 4623 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 4624 | &outrel); |
bffbf940 JJ |
4625 | htab->tls_ld_got.offset |= 1; |
4626 | } | |
6de2ae4a L |
4627 | relocation = htab->elf.sgot->output_section->vma |
4628 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 4629 | unresolved_reloc = FALSE; |
bffbf940 JJ |
4630 | break; |
4631 | ||
4632 | case R_X86_64_DTPOFF32: | |
1d85728f | 4633 | if (!info->executable|| (input_section->flags & SEC_CODE) == 0) |
351f65ca | 4634 | relocation -= elf_x86_64_dtpoff_base (info); |
bffbf940 | 4635 | else |
351f65ca | 4636 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
4637 | break; |
4638 | ||
4639 | case R_X86_64_TPOFF32: | |
6769d501 | 4640 | case R_X86_64_TPOFF64: |
9b769489 | 4641 | BFD_ASSERT (info->executable); |
351f65ca | 4642 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
4643 | break; |
4644 | ||
a69ed7f7 L |
4645 | case R_X86_64_DTPOFF64: |
4646 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
4647 | relocation -= elf_x86_64_dtpoff_base (info); | |
4648 | break; | |
4649 | ||
70256ad8 AJ |
4650 | default: |
4651 | break; | |
4652 | } | |
8d88c4ca | 4653 | |
239e1f3a AM |
4654 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
4655 | because such sections are not SEC_ALLOC and thus ld.so will | |
4656 | not process them. */ | |
c434dee6 | 4657 | if (unresolved_reloc |
239e1f3a | 4658 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
4659 | && h->def_dynamic) |
4660 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
4661 | rel->r_offset) != (bfd_vma) -1) | |
a040981f L |
4662 | { |
4663 | (*_bfd_error_handler) | |
4664 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), | |
4665 | input_bfd, | |
4666 | input_section, | |
4667 | (long) rel->r_offset, | |
4668 | howto->name, | |
4669 | h->root.root.string); | |
4670 | return FALSE; | |
4671 | } | |
c434dee6 | 4672 | |
cbe950e9 | 4673 | do_relocation: |
8d88c4ca | 4674 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
4675 | contents, rel->r_offset, |
4676 | relocation, rel->r_addend); | |
8d88c4ca | 4677 | |
62d78908 | 4678 | check_relocation_error: |
8d88c4ca | 4679 | if (r != bfd_reloc_ok) |
8da6118f | 4680 | { |
c434dee6 AJ |
4681 | const char *name; |
4682 | ||
4683 | if (h != NULL) | |
4684 | name = h->root.root.string; | |
4685 | else | |
8da6118f | 4686 | { |
c434dee6 AJ |
4687 | name = bfd_elf_string_from_elf_section (input_bfd, |
4688 | symtab_hdr->sh_link, | |
4689 | sym->st_name); | |
4690 | if (name == NULL) | |
b34976b6 | 4691 | return FALSE; |
c434dee6 AJ |
4692 | if (*name == '\0') |
4693 | name = bfd_section_name (input_bfd, sec); | |
4694 | } | |
4695 | ||
4696 | if (r == bfd_reloc_overflow) | |
4697 | { | |
c434dee6 | 4698 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
4699 | (info, (h ? &h->root : NULL), name, howto->name, |
4700 | (bfd_vma) 0, input_bfd, input_section, | |
4701 | rel->r_offset))) | |
b34976b6 | 4702 | return FALSE; |
c434dee6 AJ |
4703 | } |
4704 | else | |
4705 | { | |
4706 | (*_bfd_error_handler) | |
bb95161d | 4707 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
d003868e | 4708 | input_bfd, input_section, |
c434dee6 | 4709 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 4710 | return FALSE; |
8da6118f KH |
4711 | } |
4712 | } | |
8d88c4ca | 4713 | } |
70256ad8 | 4714 | |
b34976b6 | 4715 | return TRUE; |
70256ad8 AJ |
4716 | } |
4717 | ||
4718 | /* Finish up dynamic symbol handling. We set the contents of various | |
4719 | dynamic sections here. */ | |
4720 | ||
b34976b6 | 4721 | static bfd_boolean |
351f65ca L |
4722 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
4723 | struct bfd_link_info *info, | |
4724 | struct elf_link_hash_entry *h, | |
220cf809 | 4725 | Elf_Internal_Sym *sym ATTRIBUTE_UNUSED) |
70256ad8 | 4726 | { |
351f65ca | 4727 | struct elf_x86_64_link_hash_table *htab; |
0ff2b86e L |
4728 | const struct elf_x86_64_backend_data *abed; |
4729 | bfd_boolean use_plt_bnd; | |
70256ad8 | 4730 | |
351f65ca | 4731 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4732 | if (htab == NULL) |
4733 | return FALSE; | |
70256ad8 | 4734 | |
0ff2b86e L |
4735 | /* Use MPX backend data in case of BND relocation. Use .plt_bnd |
4736 | section only if there is .plt section. */ | |
4737 | use_plt_bnd = htab->elf.splt != NULL && htab->plt_bnd != NULL; | |
4738 | abed = (use_plt_bnd | |
4739 | ? &elf_x86_64_bnd_arch_bed | |
4740 | : get_elf_x86_64_backend_data (output_bfd)); | |
4741 | ||
70256ad8 AJ |
4742 | if (h->plt.offset != (bfd_vma) -1) |
4743 | { | |
70256ad8 | 4744 | bfd_vma plt_index; |
0ff2b86e L |
4745 | bfd_vma got_offset, plt_offset, plt_plt_offset, plt_got_offset; |
4746 | bfd_vma plt_plt_insn_end, plt_got_insn_size; | |
70256ad8 | 4747 | Elf_Internal_Rela rela; |
947216bf | 4748 | bfd_byte *loc; |
0ff2b86e | 4749 | asection *plt, *gotplt, *relplt, *resolved_plt; |
351f65ca | 4750 | const struct elf_backend_data *bed; |
cbe950e9 L |
4751 | |
4752 | /* When building a static executable, use .iplt, .igot.plt and | |
4753 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 4754 | if (htab->elf.splt != NULL) |
cbe950e9 | 4755 | { |
6de2ae4a L |
4756 | plt = htab->elf.splt; |
4757 | gotplt = htab->elf.sgotplt; | |
4758 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
4759 | } |
4760 | else | |
4761 | { | |
6de2ae4a L |
4762 | plt = htab->elf.iplt; |
4763 | gotplt = htab->elf.igotplt; | |
4764 | relplt = htab->elf.irelplt; | |
cbe950e9 | 4765 | } |
70256ad8 AJ |
4766 | |
4767 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 4768 | it up. */ |
cbe950e9 L |
4769 | if ((h->dynindx == -1 |
4770 | && !((h->forced_local || info->executable) | |
4771 | && h->def_regular | |
4772 | && h->type == STT_GNU_IFUNC)) | |
4773 | || plt == NULL | |
4774 | || gotplt == NULL | |
4775 | || relplt == NULL) | |
cec7f46a | 4776 | abort (); |
70256ad8 AJ |
4777 | |
4778 | /* Get the index in the procedure linkage table which | |
4779 | corresponds to this symbol. This is the index of this symbol | |
4780 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 4781 | first entry in the procedure linkage table is reserved. |
6bbec505 | 4782 | |
cbe950e9 | 4783 | Get the offset into the .got table of the entry that |
407443a3 | 4784 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
4785 | bytes. The first three are reserved for the dynamic linker. |
4786 | ||
4787 | For static executables, we don't reserve anything. */ | |
4788 | ||
6de2ae4a | 4789 | if (plt == htab->elf.splt) |
cbe950e9 | 4790 | { |
eed180f8 | 4791 | got_offset = h->plt.offset / abed->plt_entry_size - 1; |
e1f98742 | 4792 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
4793 | } |
4794 | else | |
4795 | { | |
eed180f8 | 4796 | got_offset = h->plt.offset / abed->plt_entry_size; |
e1f98742 | 4797 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 4798 | } |
70256ad8 | 4799 | |
0ff2b86e L |
4800 | plt_plt_insn_end = abed->plt_plt_insn_end; |
4801 | plt_plt_offset = abed->plt_plt_offset; | |
4802 | plt_got_insn_size = abed->plt_got_insn_size; | |
4803 | plt_got_offset = abed->plt_got_offset; | |
4804 | if (use_plt_bnd) | |
4805 | { | |
4806 | /* Use the second PLT with BND relocations. */ | |
4807 | const bfd_byte *plt_entry, *plt2_entry; | |
4808 | struct elf_x86_64_link_hash_entry *eh | |
4809 | = (struct elf_x86_64_link_hash_entry *) h; | |
4810 | ||
4811 | if (eh->has_bnd_reloc) | |
4812 | { | |
4813 | plt_entry = elf_x86_64_bnd_plt_entry; | |
4814 | plt2_entry = elf_x86_64_bnd_plt2_entry; | |
4815 | } | |
4816 | else | |
4817 | { | |
4818 | plt_entry = elf_x86_64_legacy_plt_entry; | |
4819 | plt2_entry = elf_x86_64_legacy_plt2_entry; | |
4820 | ||
4821 | /* Subtract 1 since there is no BND prefix. */ | |
4822 | plt_plt_insn_end -= 1; | |
4823 | plt_plt_offset -= 1; | |
4824 | plt_got_insn_size -= 1; | |
4825 | plt_got_offset -= 1; | |
4826 | } | |
4827 | ||
4828 | BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry) | |
4829 | == sizeof (elf_x86_64_legacy_plt_entry)); | |
4830 | ||
4831 | /* Fill in the entry in the procedure linkage table. */ | |
4832 | memcpy (plt->contents + h->plt.offset, | |
4833 | plt_entry, sizeof (elf_x86_64_legacy_plt_entry)); | |
4834 | /* Fill in the entry in the second PLT. */ | |
4835 | memcpy (htab->plt_bnd->contents + eh->plt_bnd.offset, | |
4836 | plt2_entry, sizeof (elf_x86_64_legacy_plt2_entry)); | |
4837 | ||
4838 | resolved_plt = htab->plt_bnd; | |
4839 | plt_offset = eh->plt_bnd.offset; | |
4840 | } | |
4841 | else | |
4842 | { | |
4843 | /* Fill in the entry in the procedure linkage table. */ | |
4844 | memcpy (plt->contents + h->plt.offset, abed->plt_entry, | |
4845 | abed->plt_entry_size); | |
4846 | ||
4847 | resolved_plt = plt; | |
4848 | plt_offset = h->plt.offset; | |
4849 | } | |
eed180f8 RM |
4850 | |
4851 | /* Insert the relocation positions of the plt section. */ | |
4852 | ||
4853 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
4854 | subtracting the size of that instruction. */ | |
653165cc | 4855 | bfd_put_32 (output_bfd, |
eed180f8 RM |
4856 | (gotplt->output_section->vma |
4857 | + gotplt->output_offset | |
4858 | + got_offset | |
0ff2b86e L |
4859 | - resolved_plt->output_section->vma |
4860 | - resolved_plt->output_offset | |
4861 | - plt_offset | |
4862 | - plt_got_insn_size), | |
4863 | resolved_plt->contents + plt_offset + plt_got_offset); | |
cbe950e9 | 4864 | |
653165cc | 4865 | /* Fill in the entry in the global offset table, initially this |
eed180f8 | 4866 | points to the second part of the PLT entry. */ |
cbe950e9 L |
4867 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4868 | + plt->output_offset | |
eed180f8 | 4869 | + h->plt.offset + abed->plt_lazy_offset), |
cbe950e9 | 4870 | gotplt->contents + got_offset); |
70256ad8 AJ |
4871 | |
4872 | /* Fill in the entry in the .rela.plt section. */ | |
cbe950e9 L |
4873 | rela.r_offset = (gotplt->output_section->vma |
4874 | + gotplt->output_offset | |
70256ad8 | 4875 | + got_offset); |
cbe950e9 L |
4876 | if (h->dynindx == -1 |
4877 | || ((info->executable | |
4878 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
4879 | && h->def_regular | |
4880 | && h->type == STT_GNU_IFUNC)) | |
4881 | { | |
4882 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
4883 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
351f65ca | 4884 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
cbe950e9 L |
4885 | rela.r_addend = (h->root.u.def.value |
4886 | + h->root.u.def.section->output_section->vma | |
4887 | + h->root.u.def.section->output_offset); | |
e1f98742 L |
4888 | /* R_X86_64_IRELATIVE comes last. */ |
4889 | plt_index = htab->next_irelative_index--; | |
cbe950e9 L |
4890 | } |
4891 | else | |
4892 | { | |
351f65ca | 4893 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); |
cbe950e9 | 4894 | rela.r_addend = 0; |
e1f98742 L |
4895 | plt_index = htab->next_jump_slot_index++; |
4896 | } | |
4897 | ||
4898 | /* Don't fill PLT entry for static executables. */ | |
4899 | if (plt == htab->elf.splt) | |
4900 | { | |
4901 | /* Put relocation index. */ | |
4902 | bfd_put_32 (output_bfd, plt_index, | |
eed180f8 | 4903 | plt->contents + h->plt.offset + abed->plt_reloc_offset); |
e1f98742 | 4904 | /* Put offset for jmp .PLT0. */ |
0ff2b86e L |
4905 | bfd_put_32 (output_bfd, - (h->plt.offset + plt_plt_insn_end), |
4906 | plt->contents + h->plt.offset + plt_plt_offset); | |
cbe950e9 | 4907 | } |
351f65ca L |
4908 | |
4909 | bed = get_elf_backend_data (output_bfd); | |
4910 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
82e96e07 | 4911 | bed->s->swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 | 4912 | |
f5385ebf | 4913 | if (!h->def_regular) |
70256ad8 AJ |
4914 | { |
4915 | /* Mark the symbol as undefined, rather than as defined in | |
47a9f7b3 JJ |
4916 | the .plt section. Leave the value if there were any |
4917 | relocations where pointer equality matters (this is a clue | |
c434dee6 AJ |
4918 | for the dynamic linker, to make function pointer |
4919 | comparisons work between an application and shared | |
47a9f7b3 JJ |
4920 | library), otherwise set it to zero. If a function is only |
4921 | called from a binary, there is no need to slow down | |
4922 | shared libraries because of that. */ | |
70256ad8 | 4923 | sym->st_shndx = SHN_UNDEF; |
f5385ebf | 4924 | if (!h->pointer_equality_needed) |
47a9f7b3 | 4925 | sym->st_value = 0; |
70256ad8 AJ |
4926 | } |
4927 | } | |
4928 | ||
bffbf940 | 4929 | if (h->got.offset != (bfd_vma) -1 |
351f65ca L |
4930 | && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type) |
4931 | && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE) | |
053579d7 | 4932 | { |
053579d7 AJ |
4933 | Elf_Internal_Rela rela; |
4934 | ||
4935 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 4936 | up. */ |
6de2ae4a | 4937 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 4938 | abort (); |
053579d7 | 4939 | |
6de2ae4a L |
4940 | rela.r_offset = (htab->elf.sgot->output_section->vma |
4941 | + htab->elf.sgot->output_offset | |
dc810e39 | 4942 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
4943 | |
4944 | /* If this is a static link, or it is a -Bsymbolic link and the | |
4945 | symbol is defined locally or was forced to be local because | |
4946 | of a version file, we just want to emit a RELATIVE reloc. | |
4947 | The entry in the global offset table will already have been | |
4948 | initialized in the relocate_section function. */ | |
710ab287 | 4949 | if (h->def_regular |
0018b0a3 L |
4950 | && h->type == STT_GNU_IFUNC) |
4951 | { | |
710ab287 L |
4952 | if (info->shared) |
4953 | { | |
4954 | /* Generate R_X86_64_GLOB_DAT. */ | |
4955 | goto do_glob_dat; | |
4956 | } | |
4957 | else | |
4958 | { | |
90d60710 L |
4959 | asection *plt; |
4960 | ||
710ab287 L |
4961 | if (!h->pointer_equality_needed) |
4962 | abort (); | |
4963 | ||
4964 | /* For non-shared object, we can't use .got.plt, which | |
4965 | contains the real function addres if we need pointer | |
4966 | equality. We load the GOT entry with the PLT entry. */ | |
90d60710 | 4967 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
4968 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4969 | + plt->output_offset | |
4970 | + h->plt.offset), | |
6de2ae4a | 4971 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
4972 | return TRUE; |
4973 | } | |
0018b0a3 L |
4974 | } |
4975 | else if (info->shared | |
4976 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
053579d7 | 4977 | { |
41bed6dd L |
4978 | if (!h->def_regular) |
4979 | return FALSE; | |
cc78d0af | 4980 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 4981 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
4982 | rela.r_addend = (h->root.u.def.value |
4983 | + h->root.u.def.section->output_section->vma | |
4984 | + h->root.u.def.section->output_offset); | |
4985 | } | |
4986 | else | |
4987 | { | |
4988 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 4989 | do_glob_dat: |
c434dee6 | 4990 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4991 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 4992 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
4993 | rela.r_addend = 0; |
4994 | } | |
4995 | ||
351f65ca | 4996 | elf_append_rela (output_bfd, htab->elf.srelgot, &rela); |
053579d7 AJ |
4997 | } |
4998 | ||
f5385ebf | 4999 | if (h->needs_copy) |
70256ad8 | 5000 | { |
70256ad8 AJ |
5001 | Elf_Internal_Rela rela; |
5002 | ||
5003 | /* This symbol needs a copy reloc. Set it up. */ | |
5004 | ||
c434dee6 AJ |
5005 | if (h->dynindx == -1 |
5006 | || (h->root.type != bfd_link_hash_defined | |
5007 | && h->root.type != bfd_link_hash_defweak) | |
5008 | || htab->srelbss == NULL) | |
5009 | abort (); | |
70256ad8 AJ |
5010 | |
5011 | rela.r_offset = (h->root.u.def.value | |
5012 | + h->root.u.def.section->output_section->vma | |
5013 | + h->root.u.def.section->output_offset); | |
351f65ca | 5014 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 5015 | rela.r_addend = 0; |
351f65ca | 5016 | elf_append_rela (output_bfd, htab->srelbss, &rela); |
70256ad8 AJ |
5017 | } |
5018 | ||
b34976b6 | 5019 | return TRUE; |
70256ad8 AJ |
5020 | } |
5021 | ||
c25bc9fc L |
5022 | /* Finish up local dynamic symbol handling. We set the contents of |
5023 | various dynamic sections here. */ | |
5024 | ||
5025 | static bfd_boolean | |
351f65ca | 5026 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
5027 | { |
5028 | struct elf_link_hash_entry *h | |
5029 | = (struct elf_link_hash_entry *) *slot; | |
5030 | struct bfd_link_info *info | |
eed180f8 | 5031 | = (struct bfd_link_info *) inf; |
c25bc9fc | 5032 | |
351f65ca | 5033 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
c25bc9fc L |
5034 | info, h, NULL); |
5035 | } | |
5036 | ||
c434dee6 AJ |
5037 | /* Used to decide how to sort relocs in an optimal manner for the |
5038 | dynamic linker, before writing them out. */ | |
5039 | ||
5040 | static enum elf_reloc_type_class | |
7e612e98 AM |
5041 | elf_x86_64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
5042 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
5043 | const Elf_Internal_Rela *rela) | |
c434dee6 | 5044 | { |
351f65ca | 5045 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 AJ |
5046 | { |
5047 | case R_X86_64_RELATIVE: | |
1da80baa | 5048 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
5049 | return reloc_class_relative; |
5050 | case R_X86_64_JUMP_SLOT: | |
5051 | return reloc_class_plt; | |
5052 | case R_X86_64_COPY: | |
5053 | return reloc_class_copy; | |
5054 | default: | |
5055 | return reloc_class_normal; | |
5056 | } | |
5057 | } | |
5058 | ||
70256ad8 AJ |
5059 | /* Finish up the dynamic sections. */ |
5060 | ||
b34976b6 | 5061 | static bfd_boolean |
351f65ca L |
5062 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
5063 | struct bfd_link_info *info) | |
70256ad8 | 5064 | { |
351f65ca | 5065 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
5066 | bfd *dynobj; |
5067 | asection *sdyn; | |
0ff2b86e | 5068 | const struct elf_x86_64_backend_data *abed; |
70256ad8 | 5069 | |
351f65ca | 5070 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
5071 | if (htab == NULL) |
5072 | return FALSE; | |
5073 | ||
0ff2b86e L |
5074 | /* Use MPX backend data in case of BND relocation. Use .plt_bnd |
5075 | section only if there is .plt section. */ | |
5076 | abed = (htab->elf.splt != NULL && htab->plt_bnd != NULL | |
5077 | ? &elf_x86_64_bnd_arch_bed | |
5078 | : get_elf_x86_64_backend_data (output_bfd)); | |
5079 | ||
c434dee6 | 5080 | dynobj = htab->elf.dynobj; |
3d4d4302 | 5081 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
70256ad8 | 5082 | |
c434dee6 | 5083 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 5084 | { |
82e96e07 L |
5085 | bfd_byte *dyncon, *dynconend; |
5086 | const struct elf_backend_data *bed; | |
5087 | bfd_size_type sizeof_dyn; | |
70256ad8 | 5088 | |
6de2ae4a | 5089 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 5090 | abort (); |
70256ad8 | 5091 | |
82e96e07 L |
5092 | bed = get_elf_backend_data (dynobj); |
5093 | sizeof_dyn = bed->s->sizeof_dyn; | |
5094 | dyncon = sdyn->contents; | |
5095 | dynconend = sdyn->contents + sdyn->size; | |
5096 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
5097 | { |
5098 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
5099 | asection *s; |
5100 | ||
82e96e07 | 5101 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
5102 | |
5103 | switch (dyn.d_tag) | |
5104 | { | |
5105 | default: | |
053579d7 | 5106 | continue; |
70256ad8 AJ |
5107 | |
5108 | case DT_PLTGOT: | |
6de2ae4a | 5109 | s = htab->elf.sgotplt; |
8c37241b | 5110 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 5111 | break; |
70256ad8 AJ |
5112 | |
5113 | case DT_JMPREL: | |
6de2ae4a | 5114 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 5115 | break; |
70256ad8 | 5116 | |
c434dee6 | 5117 | case DT_PLTRELSZ: |
6de2ae4a | 5118 | s = htab->elf.srelplt->output_section; |
eea6121a | 5119 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
5120 | break; |
5121 | ||
5122 | case DT_RELASZ: | |
c434dee6 AJ |
5123 | /* The procedure linkage table relocs (DT_JMPREL) should |
5124 | not be included in the overall relocs (DT_RELA). | |
5125 | Therefore, we override the DT_RELASZ entry here to | |
5126 | make it not include the JMPREL relocs. Since the | |
5127 | linker script arranges for .rela.plt to follow all | |
5128 | other relocation sections, we don't have to worry | |
5129 | about changing the DT_RELA entry. */ | |
6de2ae4a | 5130 | if (htab->elf.srelplt != NULL) |
70256ad8 | 5131 | { |
6de2ae4a | 5132 | s = htab->elf.srelplt->output_section; |
eea6121a | 5133 | dyn.d_un.d_val -= s->size; |
70256ad8 AJ |
5134 | } |
5135 | break; | |
67a4f2b7 AO |
5136 | |
5137 | case DT_TLSDESC_PLT: | |
6de2ae4a | 5138 | s = htab->elf.splt; |
67a4f2b7 AO |
5139 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
5140 | + htab->tlsdesc_plt; | |
5141 | break; | |
5142 | ||
5143 | case DT_TLSDESC_GOT: | |
6de2ae4a | 5144 | s = htab->elf.sgot; |
67a4f2b7 AO |
5145 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
5146 | + htab->tlsdesc_got; | |
5147 | break; | |
70256ad8 | 5148 | } |
c434dee6 | 5149 | |
82e96e07 | 5150 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
5151 | } |
5152 | ||
c434dee6 | 5153 | /* Fill in the special first entry in the procedure linkage table. */ |
6de2ae4a | 5154 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 5155 | { |
653165cc | 5156 | /* Fill in the first entry in the procedure linkage table. */ |
eed180f8 RM |
5157 | memcpy (htab->elf.splt->contents, |
5158 | abed->plt0_entry, abed->plt_entry_size); | |
653165cc AJ |
5159 | /* Add offset for pushq GOT+8(%rip), since the instruction |
5160 | uses 6 bytes subtract this value. */ | |
5161 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
5162 | (htab->elf.sgotplt->output_section->vma |
5163 | + htab->elf.sgotplt->output_offset | |
653165cc | 5164 | + 8 |
6de2ae4a L |
5165 | - htab->elf.splt->output_section->vma |
5166 | - htab->elf.splt->output_offset | |
653165cc | 5167 | - 6), |
eed180f8 RM |
5168 | htab->elf.splt->contents + abed->plt0_got1_offset); |
5169 | /* Add offset for the PC-relative instruction accessing GOT+16, | |
5170 | subtracting the offset to the end of that instruction. */ | |
653165cc | 5171 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5172 | (htab->elf.sgotplt->output_section->vma |
5173 | + htab->elf.sgotplt->output_offset | |
653165cc | 5174 | + 16 |
6de2ae4a L |
5175 | - htab->elf.splt->output_section->vma |
5176 | - htab->elf.splt->output_offset | |
eed180f8 RM |
5177 | - abed->plt0_got2_insn_end), |
5178 | htab->elf.splt->contents + abed->plt0_got2_offset); | |
653165cc | 5179 | |
eed180f8 RM |
5180 | elf_section_data (htab->elf.splt->output_section) |
5181 | ->this_hdr.sh_entsize = abed->plt_entry_size; | |
67a4f2b7 AO |
5182 | |
5183 | if (htab->tlsdesc_plt) | |
5184 | { | |
5185 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6de2ae4a | 5186 | htab->elf.sgot->contents + htab->tlsdesc_got); |
67a4f2b7 | 5187 | |
6de2ae4a | 5188 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, |
eed180f8 | 5189 | abed->plt0_entry, abed->plt_entry_size); |
67a4f2b7 AO |
5190 | |
5191 | /* Add offset for pushq GOT+8(%rip), since the | |
5192 | instruction uses 6 bytes subtract this value. */ | |
5193 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
5194 | (htab->elf.sgotplt->output_section->vma |
5195 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 5196 | + 8 |
6de2ae4a L |
5197 | - htab->elf.splt->output_section->vma |
5198 | - htab->elf.splt->output_offset | |
67a4f2b7 AO |
5199 | - htab->tlsdesc_plt |
5200 | - 6), | |
eed180f8 RM |
5201 | htab->elf.splt->contents |
5202 | + htab->tlsdesc_plt + abed->plt0_got1_offset); | |
5203 | /* Add offset for the PC-relative instruction accessing GOT+TDG, | |
5204 | where TGD stands for htab->tlsdesc_got, subtracting the offset | |
5205 | to the end of that instruction. */ | |
67a4f2b7 | 5206 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5207 | (htab->elf.sgot->output_section->vma |
5208 | + htab->elf.sgot->output_offset | |
67a4f2b7 | 5209 | + htab->tlsdesc_got |
6de2ae4a L |
5210 | - htab->elf.splt->output_section->vma |
5211 | - htab->elf.splt->output_offset | |
67a4f2b7 | 5212 | - htab->tlsdesc_plt |
eed180f8 RM |
5213 | - abed->plt0_got2_insn_end), |
5214 | htab->elf.splt->contents | |
5215 | + htab->tlsdesc_plt + abed->plt0_got2_offset); | |
67a4f2b7 | 5216 | } |
70256ad8 | 5217 | } |
70256ad8 AJ |
5218 | } |
5219 | ||
0ff2b86e L |
5220 | if (htab->plt_bnd != NULL) |
5221 | elf_section_data (htab->plt_bnd->output_section) | |
5222 | ->this_hdr.sh_entsize = sizeof (elf_x86_64_bnd_plt2_entry); | |
5223 | ||
6de2ae4a | 5224 | if (htab->elf.sgotplt) |
70256ad8 | 5225 | { |
56d4289c L |
5226 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
5227 | { | |
5228 | (*_bfd_error_handler) | |
5229 | (_("discarded output section: `%A'"), htab->elf.sgotplt); | |
5230 | return FALSE; | |
5231 | } | |
5232 | ||
c434dee6 | 5233 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 5234 | if (htab->elf.sgotplt->size > 0) |
c434dee6 AJ |
5235 | { |
5236 | /* Set the first entry in the global offset table to the address of | |
5237 | the dynamic section. */ | |
5238 | if (sdyn == NULL) | |
6de2ae4a | 5239 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); |
c434dee6 AJ |
5240 | else |
5241 | bfd_put_64 (output_bfd, | |
5242 | sdyn->output_section->vma + sdyn->output_offset, | |
6de2ae4a | 5243 | htab->elf.sgotplt->contents); |
c434dee6 | 5244 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
6de2ae4a L |
5245 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); |
5246 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
c434dee6 | 5247 | } |
70256ad8 | 5248 | |
6de2ae4a | 5249 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = |
c434dee6 AJ |
5250 | GOT_ENTRY_SIZE; |
5251 | } | |
70256ad8 | 5252 | |
e41b3a13 | 5253 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
5254 | if (htab->plt_eh_frame != NULL |
5255 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
5256 | { |
5257 | if (htab->elf.splt != NULL | |
5258 | && htab->elf.splt->size != 0 | |
5259 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
5260 | && htab->elf.splt->output_section != NULL | |
5261 | && htab->plt_eh_frame->output_section != NULL) | |
5262 | { | |
5263 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
5264 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
5265 | + htab->plt_eh_frame->output_offset | |
5266 | + PLT_FDE_START_OFFSET; | |
5267 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5268 | htab->plt_eh_frame->contents | |
5269 | + PLT_FDE_START_OFFSET); | |
5270 | } | |
dbaa2011 | 5271 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
5272 | { |
5273 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5274 | htab->plt_eh_frame, | |
5275 | htab->plt_eh_frame->contents)) | |
5276 | return FALSE; | |
5277 | } | |
5278 | } | |
5279 | ||
6de2ae4a L |
5280 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
5281 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
5282 | = GOT_ENTRY_SIZE; |
5283 | ||
c25bc9fc L |
5284 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
5285 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 5286 | elf_x86_64_finish_local_dynamic_symbol, |
c25bc9fc L |
5287 | info); |
5288 | ||
b34976b6 | 5289 | return TRUE; |
8d88c4ca NC |
5290 | } |
5291 | ||
144bed8d L |
5292 | /* Return address in section PLT for the Ith GOTPLT relocation, for |
5293 | relocation REL or (bfd_vma) -1 if it should not be included. */ | |
4c45e5c9 JJ |
5294 | |
5295 | static bfd_vma | |
351f65ca | 5296 | elf_x86_64_plt_sym_val (bfd_vma i, const asection *plt, |
144bed8d | 5297 | const arelent *rel) |
4c45e5c9 | 5298 | { |
144bed8d L |
5299 | bfd *abfd; |
5300 | const struct elf_x86_64_backend_data *bed; | |
5301 | bfd_vma plt_offset; | |
5302 | ||
5303 | /* Only match R_X86_64_JUMP_SLOT and R_X86_64_IRELATIVE. */ | |
5304 | if (rel->howto->type != R_X86_64_JUMP_SLOT | |
5305 | && rel->howto->type != R_X86_64_IRELATIVE) | |
5306 | return (bfd_vma) -1; | |
5307 | ||
5308 | abfd = plt->owner; | |
5309 | bed = get_elf_x86_64_backend_data (abfd); | |
5310 | plt_offset = bed->plt_entry_size; | |
cca5b8b6 L |
5311 | |
5312 | if (elf_elfheader (abfd)->e_ident[EI_OSABI] != ELFOSABI_GNU) | |
5313 | return plt->vma + (i + 1) * plt_offset; | |
5314 | ||
144bed8d L |
5315 | while (plt_offset < plt->size) |
5316 | { | |
5317 | bfd_vma reloc_index; | |
5318 | bfd_byte reloc_index_raw[4]; | |
5319 | ||
5320 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
5321 | reloc_index_raw, | |
5322 | plt_offset + bed->plt_reloc_offset, | |
5323 | sizeof (reloc_index_raw))) | |
5324 | return (bfd_vma) -1; | |
5325 | ||
5326 | reloc_index = H_GET_32 (abfd, reloc_index_raw); | |
5327 | if (reloc_index == i) | |
5328 | return plt->vma + plt_offset; | |
5329 | plt_offset += bed->plt_entry_size; | |
5330 | } | |
5331 | ||
5332 | abort (); | |
5333 | } | |
5334 | ||
5335 | /* Return offset in .plt.bnd section for the Ith GOTPLT relocation with | |
5336 | PLT section, or (bfd_vma) -1 if it should not be included. */ | |
5337 | ||
5338 | static bfd_vma | |
5339 | elf_x86_64_plt_sym_val_offset_plt_bnd (bfd_vma i, const asection *plt) | |
5340 | { | |
5341 | const struct elf_x86_64_backend_data *bed = &elf_x86_64_bnd_arch_bed; | |
5342 | bfd *abfd = plt->owner; | |
5343 | bfd_vma plt_offset = bed->plt_entry_size; | |
cca5b8b6 L |
5344 | |
5345 | if (elf_elfheader (abfd)->e_ident[EI_OSABI] != ELFOSABI_GNU) | |
5346 | return i * sizeof (elf_x86_64_legacy_plt2_entry); | |
5347 | ||
144bed8d L |
5348 | while (plt_offset < plt->size) |
5349 | { | |
5350 | bfd_vma reloc_index; | |
5351 | bfd_byte reloc_index_raw[4]; | |
5352 | ||
5353 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
5354 | reloc_index_raw, | |
5355 | plt_offset + bed->plt_reloc_offset, | |
5356 | sizeof (reloc_index_raw))) | |
5357 | return (bfd_vma) -1; | |
5358 | ||
5359 | reloc_index = H_GET_32 (abfd, reloc_index_raw); | |
5360 | if (reloc_index == i) | |
5361 | { | |
5362 | /* This is the index in .plt section. */ | |
5363 | long plt_index = plt_offset / bed->plt_entry_size; | |
5364 | /* Return the offset in .plt.bnd section. */ | |
5365 | return (plt_index - 1) * sizeof (elf_x86_64_legacy_plt2_entry); | |
5366 | } | |
5367 | plt_offset += bed->plt_entry_size; | |
5368 | } | |
5369 | ||
5370 | abort (); | |
4c45e5c9 | 5371 | } |
8df9fc9d | 5372 | |
0ff2b86e L |
5373 | /* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section |
5374 | support. */ | |
5375 | ||
5376 | static long | |
5377 | elf_x86_64_get_synthetic_symtab (bfd *abfd, | |
5378 | long symcount, | |
5379 | asymbol **syms, | |
5380 | long dynsymcount, | |
5381 | asymbol **dynsyms, | |
5382 | asymbol **ret) | |
5383 | { | |
5384 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
5385 | asection *relplt; | |
5386 | asymbol *s; | |
5387 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); | |
5388 | arelent *p; | |
5389 | long count, i, n; | |
5390 | size_t size; | |
5391 | Elf_Internal_Shdr *hdr; | |
5392 | char *names; | |
144bed8d L |
5393 | asection *plt, *plt_push; |
5394 | ||
5395 | plt_push = bfd_get_section_by_name (abfd, ".plt"); | |
5396 | if (plt_push == NULL) | |
5397 | return 0; | |
0ff2b86e L |
5398 | |
5399 | plt = bfd_get_section_by_name (abfd, ".plt.bnd"); | |
5400 | /* Use the generic ELF version if there is no .plt.bnd section. */ | |
5401 | if (plt == NULL) | |
5402 | return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms, | |
5403 | dynsymcount, dynsyms, ret); | |
5404 | ||
5405 | *ret = NULL; | |
5406 | ||
5407 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) | |
5408 | return 0; | |
5409 | ||
5410 | if (dynsymcount <= 0) | |
5411 | return 0; | |
5412 | ||
5413 | relplt = bfd_get_section_by_name (abfd, ".rela.plt"); | |
5414 | if (relplt == NULL) | |
5415 | return 0; | |
5416 | ||
5417 | hdr = &elf_section_data (relplt)->this_hdr; | |
5418 | if (hdr->sh_link != elf_dynsymtab (abfd) | |
5419 | || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA)) | |
5420 | return 0; | |
5421 | ||
5422 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; | |
5423 | if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) | |
5424 | return -1; | |
5425 | ||
5426 | count = relplt->size / hdr->sh_entsize; | |
5427 | size = count * sizeof (asymbol); | |
5428 | p = relplt->relocation; | |
5429 | for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel) | |
5430 | { | |
5431 | size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); | |
5432 | if (p->addend != 0) | |
5433 | size += sizeof ("+0x") - 1 + 8 + 8; | |
5434 | } | |
5435 | ||
5436 | s = *ret = (asymbol *) bfd_malloc (size); | |
5437 | if (s == NULL) | |
5438 | return -1; | |
5439 | ||
5440 | names = (char *) (s + count); | |
5441 | p = relplt->relocation; | |
5442 | n = 0; | |
0ff2b86e L |
5443 | for (i = 0; i < count; i++, p++) |
5444 | { | |
144bed8d | 5445 | bfd_vma offset; |
0ff2b86e L |
5446 | size_t len; |
5447 | ||
144bed8d L |
5448 | if (p->howto->type != R_X86_64_JUMP_SLOT |
5449 | && p->howto->type != R_X86_64_IRELATIVE) | |
5450 | continue; | |
5451 | ||
5452 | offset = elf_x86_64_plt_sym_val_offset_plt_bnd (i, plt_push); | |
5453 | ||
0ff2b86e L |
5454 | *s = **p->sym_ptr_ptr; |
5455 | /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since | |
5456 | we are defining a symbol, ensure one of them is set. */ | |
5457 | if ((s->flags & BSF_LOCAL) == 0) | |
5458 | s->flags |= BSF_GLOBAL; | |
5459 | s->flags |= BSF_SYNTHETIC; | |
5460 | s->section = plt; | |
144bed8d | 5461 | s->value = offset; |
0ff2b86e L |
5462 | s->name = names; |
5463 | s->udata.p = NULL; | |
5464 | len = strlen ((*p->sym_ptr_ptr)->name); | |
5465 | memcpy (names, (*p->sym_ptr_ptr)->name, len); | |
5466 | names += len; | |
5467 | if (p->addend != 0) | |
5468 | { | |
5469 | char buf[30], *a; | |
5470 | ||
5471 | memcpy (names, "+0x", sizeof ("+0x") - 1); | |
5472 | names += sizeof ("+0x") - 1; | |
5473 | bfd_sprintf_vma (abfd, buf, p->addend); | |
5474 | for (a = buf; *a == '0'; ++a) | |
5475 | ; | |
5476 | len = strlen (a); | |
5477 | memcpy (names, a, len); | |
5478 | names += len; | |
5479 | } | |
5480 | memcpy (names, "@plt", sizeof ("@plt")); | |
5481 | names += sizeof ("@plt"); | |
5482 | ++s, ++n; | |
0ff2b86e L |
5483 | } |
5484 | ||
5485 | return n; | |
5486 | } | |
5487 | ||
d2b2c203 DJ |
5488 | /* Handle an x86-64 specific section when reading an object file. This |
5489 | is called when elfcode.h finds a section with an unknown type. */ | |
5490 | ||
5491 | static bfd_boolean | |
0c723101 L |
5492 | elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, |
5493 | const char *name, int shindex) | |
d2b2c203 DJ |
5494 | { |
5495 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
5496 | return FALSE; | |
5497 | ||
6dc132d9 | 5498 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
5499 | return FALSE; |
5500 | ||
5501 | return TRUE; | |
5502 | } | |
5503 | ||
3b22753a L |
5504 | /* Hook called by the linker routine which adds symbols from an object |
5505 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
5506 | of .bss. */ | |
5507 | ||
5508 | static bfd_boolean | |
351f65ca L |
5509 | elf_x86_64_add_symbol_hook (bfd *abfd, |
5510 | struct bfd_link_info *info, | |
5511 | Elf_Internal_Sym *sym, | |
5512 | const char **namep ATTRIBUTE_UNUSED, | |
5513 | flagword *flagsp ATTRIBUTE_UNUSED, | |
5514 | asection **secp, | |
5515 | bfd_vma *valp) | |
3b22753a L |
5516 | { |
5517 | asection *lcomm; | |
5518 | ||
5519 | switch (sym->st_shndx) | |
5520 | { | |
5521 | case SHN_X86_64_LCOMMON: | |
5522 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
5523 | if (lcomm == NULL) | |
5524 | { | |
5525 | lcomm = bfd_make_section_with_flags (abfd, | |
5526 | "LARGE_COMMON", | |
5527 | (SEC_ALLOC | |
5528 | | SEC_IS_COMMON | |
5529 | | SEC_LINKER_CREATED)); | |
5530 | if (lcomm == NULL) | |
5531 | return FALSE; | |
5532 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
5533 | } | |
5534 | *secp = lcomm; | |
5535 | *valp = sym->st_size; | |
c35bdf6e | 5536 | return TRUE; |
3b22753a | 5537 | } |
d8045f23 | 5538 | |
f1885d1e AM |
5539 | if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
5540 | || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE) | |
5541 | && (abfd->flags & DYNAMIC) == 0 | |
5542 | && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) | |
f64b2e8d | 5543 | elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE; |
d8045f23 | 5544 | |
3b22753a L |
5545 | return TRUE; |
5546 | } | |
5547 | ||
5548 | ||
5549 | /* Given a BFD section, try to locate the corresponding ELF section | |
5550 | index. */ | |
5551 | ||
5552 | static bfd_boolean | |
351f65ca L |
5553 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
5554 | asection *sec, int *index_return) | |
3b22753a L |
5555 | { |
5556 | if (sec == &_bfd_elf_large_com_section) | |
5557 | { | |
91d6fa6a | 5558 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
5559 | return TRUE; |
5560 | } | |
5561 | return FALSE; | |
5562 | } | |
5563 | ||
5564 | /* Process a symbol. */ | |
5565 | ||
5566 | static void | |
351f65ca L |
5567 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
5568 | asymbol *asym) | |
3b22753a L |
5569 | { |
5570 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
5571 | ||
5572 | switch (elfsym->internal_elf_sym.st_shndx) | |
5573 | { | |
5574 | case SHN_X86_64_LCOMMON: | |
5575 | asym->section = &_bfd_elf_large_com_section; | |
5576 | asym->value = elfsym->internal_elf_sym.st_size; | |
5577 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
5578 | asym->flags &= ~BSF_GLOBAL; | |
5579 | break; | |
5580 | } | |
5581 | } | |
5582 | ||
5583 | static bfd_boolean | |
351f65ca | 5584 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
5585 | { |
5586 | return (sym->st_shndx == SHN_COMMON | |
5587 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
5588 | } | |
5589 | ||
5590 | static unsigned int | |
351f65ca | 5591 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
5592 | { |
5593 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
5594 | return SHN_COMMON; | |
5595 | else | |
5596 | return SHN_X86_64_LCOMMON; | |
5597 | } | |
5598 | ||
5599 | static asection * | |
351f65ca | 5600 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
5601 | { |
5602 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
5603 | return bfd_com_section_ptr; | |
5604 | else | |
5605 | return &_bfd_elf_large_com_section; | |
5606 | } | |
5607 | ||
5608 | static bfd_boolean | |
5d13b3b3 AM |
5609 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
5610 | const Elf_Internal_Sym *sym, | |
351f65ca | 5611 | asection **psec, |
5d13b3b3 AM |
5612 | bfd_boolean newdef, |
5613 | bfd_boolean olddef, | |
351f65ca | 5614 | bfd *oldbfd, |
5d13b3b3 | 5615 | const asection *oldsec) |
3b22753a L |
5616 | { |
5617 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
5618 | normal common symbol. We turn the large common symbol into a |
5619 | normal one. */ | |
5d13b3b3 | 5620 | if (!olddef |
3b22753a | 5621 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
5622 | && !newdef |
5623 | && bfd_is_com_section (*psec) | |
5624 | && oldsec != *psec) | |
3b22753a | 5625 | { |
00492999 | 5626 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 5627 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
5628 | { |
5629 | h->root.u.c.p->section | |
5630 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
5631 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
5632 | } | |
5633 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
5634 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
5635 | *psec = bfd_com_section_ptr; | |
3b22753a L |
5636 | } |
5637 | ||
5638 | return TRUE; | |
5639 | } | |
5640 | ||
5641 | static int | |
351f65ca L |
5642 | elf_x86_64_additional_program_headers (bfd *abfd, |
5643 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
5644 | { |
5645 | asection *s; | |
9a2e389a | 5646 | int count = 0; |
3b22753a L |
5647 | |
5648 | /* Check to see if we need a large readonly segment. */ | |
5649 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
5650 | if (s && (s->flags & SEC_LOAD)) | |
5651 | count++; | |
5652 | ||
5653 | /* Check to see if we need a large data segment. Since .lbss sections | |
5654 | is placed right after the .bss section, there should be no need for | |
5655 | a large data segment just because of .lbss. */ | |
5656 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
5657 | if (s && (s->flags & SEC_LOAD)) | |
5658 | count++; | |
5659 | ||
5660 | return count; | |
5661 | } | |
5662 | ||
fdc90cb4 JJ |
5663 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
5664 | ||
5665 | static bfd_boolean | |
351f65ca | 5666 | elf_x86_64_hash_symbol (struct elf_link_hash_entry *h) |
fdc90cb4 JJ |
5667 | { |
5668 | if (h->plt.offset != (bfd_vma) -1 | |
5669 | && !h->def_regular | |
5670 | && !h->pointer_equality_needed) | |
5671 | return FALSE; | |
5672 | ||
5673 | return _bfd_elf_hash_symbol (h); | |
5674 | } | |
5675 | ||
c543bf9a L |
5676 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
5677 | ||
5678 | static bfd_boolean | |
5679 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
5680 | const bfd_target *output) | |
5681 | { | |
5682 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
5683 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
5684 | && _bfd_elf_relocs_compatible (input, output)); | |
5685 | } | |
5686 | ||
9a2e389a | 5687 | static const struct bfd_elf_special_section |
351f65ca | 5688 | elf_x86_64_special_sections[]= |
3b22753a | 5689 | { |
0112cd26 NC |
5690 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
5691 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
5692 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
5693 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
5694 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
5695 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
5696 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
5697 | }; |
5698 | ||
6d00b590 | 5699 | #define TARGET_LITTLE_SYM x86_64_elf64_vec |
70256ad8 AJ |
5700 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
5701 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 5702 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 5703 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 5704 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 5705 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 5706 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
5707 | |
5708 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 5709 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
5710 | #define elf_backend_want_got_plt 1 |
5711 | #define elf_backend_plt_readonly 1 | |
5712 | #define elf_backend_want_plt_sym 0 | |
5713 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 5714 | #define elf_backend_rela_normal 1 |
e41b3a13 | 5715 | #define elf_backend_plt_alignment 4 |
70256ad8 | 5716 | |
351f65ca | 5717 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 5718 | |
70256ad8 | 5719 | #define bfd_elf64_bfd_link_hash_table_create \ |
351f65ca | 5720 | elf_x86_64_link_hash_table_create |
351f65ca | 5721 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup |
157090f7 | 5722 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 5723 | elf_x86_64_reloc_name_lookup |
70256ad8 | 5724 | |
351f65ca | 5725 | #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol |
c543bf9a | 5726 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca L |
5727 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
5728 | #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol | |
5729 | #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections | |
5730 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections | |
5731 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
5732 | #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook | |
5733 | #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook | |
5734 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus | |
5735 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
5736 | #ifdef CORE_HEADER |
5737 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
5738 | #endif | |
351f65ca L |
5739 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
5740 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
5741 | #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections | |
5742 | #define elf_backend_always_size_sections elf_x86_64_always_size_sections | |
74541ad4 | 5743 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
351f65ca | 5744 | #define elf_backend_plt_sym_val elf_x86_64_plt_sym_val |
407443a3 | 5745 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
351f65ca | 5746 | #define bfd_elf64_mkobject elf_x86_64_mkobject |
0ff2b86e | 5747 | #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab |
8d88c4ca | 5748 | |
d2b2c203 | 5749 | #define elf_backend_section_from_shdr \ |
351f65ca | 5750 | elf_x86_64_section_from_shdr |
d2b2c203 | 5751 | |
3b22753a | 5752 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 5753 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 5754 | #define elf_backend_add_symbol_hook \ |
351f65ca | 5755 | elf_x86_64_add_symbol_hook |
3b22753a | 5756 | #define elf_backend_symbol_processing \ |
351f65ca | 5757 | elf_x86_64_symbol_processing |
3b22753a | 5758 | #define elf_backend_common_section_index \ |
351f65ca | 5759 | elf_x86_64_common_section_index |
3b22753a | 5760 | #define elf_backend_common_section \ |
351f65ca | 5761 | elf_x86_64_common_section |
3b22753a | 5762 | #define elf_backend_common_definition \ |
351f65ca | 5763 | elf_x86_64_common_definition |
3b22753a | 5764 | #define elf_backend_merge_symbol \ |
351f65ca | 5765 | elf_x86_64_merge_symbol |
3b22753a | 5766 | #define elf_backend_special_sections \ |
351f65ca | 5767 | elf_x86_64_special_sections |
3b22753a | 5768 | #define elf_backend_additional_program_headers \ |
351f65ca | 5769 | elf_x86_64_additional_program_headers |
fdc90cb4 | 5770 | #define elf_backend_hash_symbol \ |
351f65ca | 5771 | elf_x86_64_hash_symbol |
3b22753a | 5772 | |
8d88c4ca | 5773 | #include "elf64-target.h" |
9d7cbccd NC |
5774 | |
5775 | /* FreeBSD support. */ | |
5776 | ||
5777 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5778 | #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec |
9d7cbccd NC |
5779 | #undef TARGET_LITTLE_NAME |
5780 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
5781 | ||
d1036acb L |
5782 | #undef ELF_OSABI |
5783 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 5784 | |
9d7cbccd NC |
5785 | #undef elf64_bed |
5786 | #define elf64_bed elf64_x86_64_fbsd_bed | |
5787 | ||
5788 | #include "elf64-target.h" | |
8a9036a4 | 5789 | |
a6cc6b3b RO |
5790 | /* Solaris 2 support. */ |
5791 | ||
5792 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5793 | #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec |
a6cc6b3b RO |
5794 | #undef TARGET_LITTLE_NAME |
5795 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
5796 | ||
5797 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
5798 | objects won't be recognized. */ | |
5799 | #undef ELF_OSABI | |
5800 | ||
5801 | #undef elf64_bed | |
5802 | #define elf64_bed elf64_x86_64_sol2_bed | |
5803 | ||
7dc98aea RO |
5804 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
5805 | boundary. */ | |
5806 | #undef elf_backend_static_tls_alignment | |
5807 | #define elf_backend_static_tls_alignment 16 | |
5808 | ||
a6cc6b3b RO |
5809 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
5810 | ||
5811 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
5812 | File, p.63. */ | |
5813 | #undef elf_backend_want_plt_sym | |
5814 | #define elf_backend_want_plt_sym 1 | |
5815 | ||
5816 | #include "elf64-target.h" | |
5817 | ||
0ff2b86e L |
5818 | #undef bfd_elf64_get_synthetic_symtab |
5819 | ||
8059fb19 RM |
5820 | /* Native Client support. */ |
5821 | ||
64b384e1 RM |
5822 | static bfd_boolean |
5823 | elf64_x86_64_nacl_elf_object_p (bfd *abfd) | |
5824 | { | |
5825 | /* Set the right machine number for a NaCl x86-64 ELF64 file. */ | |
5826 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl); | |
5827 | return TRUE; | |
5828 | } | |
5829 | ||
8059fb19 | 5830 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5831 | #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec |
8059fb19 RM |
5832 | #undef TARGET_LITTLE_NAME |
5833 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
5834 | #undef elf64_bed | |
5835 | #define elf64_bed elf64_x86_64_nacl_bed | |
5836 | ||
5837 | #undef ELF_MAXPAGESIZE | |
5838 | #undef ELF_MINPAGESIZE | |
5839 | #undef ELF_COMMONPAGESIZE | |
5840 | #define ELF_MAXPAGESIZE 0x10000 | |
5841 | #define ELF_MINPAGESIZE 0x10000 | |
5842 | #define ELF_COMMONPAGESIZE 0x10000 | |
5843 | ||
5844 | /* Restore defaults. */ | |
5845 | #undef ELF_OSABI | |
5846 | #undef elf_backend_static_tls_alignment | |
5847 | #undef elf_backend_want_plt_sym | |
5848 | #define elf_backend_want_plt_sym 0 | |
5849 | ||
5850 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
5851 | ||
5852 | #undef elf_backend_plt_alignment | |
5853 | #define elf_backend_plt_alignment 5 | |
5854 | #define NACL_PLT_ENTRY_SIZE 64 | |
5855 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
5856 | ||
5857 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
5858 | { | |
5859 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
5860 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ | |
5861 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
5862 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5863 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
5864 | ||
ea2d813e | 5865 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
70cc877f | 5866 | 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */ |
ea2d813e RM |
5867 | |
5868 | /* 32 bytes of nop to pad out to the standard size. */ | |
8059fb19 RM |
5869 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ |
5870 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
5871 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
5872 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
ea2d813e RM |
5873 | 0x66, /* excess data32 prefix */ |
5874 | 0x90 /* nop */ | |
8059fb19 RM |
5875 | }; |
5876 | ||
5877 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
5878 | { | |
5879 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
5880 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
5881 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5882 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
5883 | ||
5884 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
5885 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
5886 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
5887 | ||
5888 | /* Lazy GOT entries point here (32-byte aligned). */ | |
5889 | 0x68, /* pushq immediate */ | |
5890 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
5891 | 0xe9, /* jmp relative */ | |
5892 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
5893 | ||
5894 | /* 22 bytes of nop to pad out to the standard size. */ | |
5895 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
5896 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
5897 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ | |
5898 | }; | |
5899 | ||
5900 | /* .eh_frame covering the .plt section. */ | |
5901 | ||
5902 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
5903 | { | |
5904 | #if (PLT_CIE_LENGTH != 20 \ | |
5905 | || PLT_FDE_LENGTH != 36 \ | |
5906 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
5907 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
5908 | # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!" | |
5909 | #endif | |
5910 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
5911 | 0, 0, 0, 0, /* CIE ID */ | |
5912 | 1, /* CIE version */ | |
5913 | 'z', 'R', 0, /* Augmentation string */ | |
5914 | 1, /* Code alignment factor */ | |
5915 | 0x78, /* Data alignment factor */ | |
5916 | 16, /* Return address column */ | |
5917 | 1, /* Augmentation size */ | |
5918 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
5919 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
5920 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
5921 | DW_CFA_nop, DW_CFA_nop, | |
5922 | ||
5923 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
5924 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
5925 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
5926 | 0, 0, 0, 0, /* .plt size goes here */ | |
5927 | 0, /* Augmentation size */ | |
5928 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
5929 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
5930 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
5931 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
5932 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
5933 | 13, /* Block length */ | |
5934 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
5935 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
5936 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
5937 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
5938 | DW_CFA_nop, DW_CFA_nop | |
5939 | }; | |
5940 | ||
5941 | static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed = | |
5942 | { | |
5943 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ | |
5944 | elf_x86_64_nacl_plt_entry, /* plt_entry */ | |
5945 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
5946 | 2, /* plt0_got1_offset */ | |
5947 | 9, /* plt0_got2_offset */ | |
5948 | 13, /* plt0_got2_insn_end */ | |
5949 | 3, /* plt_got_offset */ | |
5950 | 33, /* plt_reloc_offset */ | |
5951 | 38, /* plt_plt_offset */ | |
5952 | 7, /* plt_got_insn_size */ | |
5953 | 42, /* plt_plt_insn_end */ | |
5954 | 32, /* plt_lazy_offset */ | |
5955 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ | |
5956 | sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */ | |
5957 | }; | |
5958 | ||
5959 | #undef elf_backend_arch_data | |
5960 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
5961 | ||
64b384e1 RM |
5962 | #undef elf_backend_object_p |
5963 | #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p | |
5a68afcf RM |
5964 | #undef elf_backend_modify_segment_map |
5965 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
5966 | #undef elf_backend_modify_program_headers | |
5967 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
5968 | #undef elf_backend_final_write_processing |
5969 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 5970 | |
8059fb19 RM |
5971 | #include "elf64-target.h" |
5972 | ||
5973 | /* Native Client x32 support. */ | |
5974 | ||
64b384e1 RM |
5975 | static bfd_boolean |
5976 | elf32_x86_64_nacl_elf_object_p (bfd *abfd) | |
5977 | { | |
5978 | /* Set the right machine number for a NaCl x86-64 ELF32 file. */ | |
5979 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl); | |
5980 | return TRUE; | |
5981 | } | |
5982 | ||
8059fb19 | 5983 | #undef TARGET_LITTLE_SYM |
6d00b590 | 5984 | #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec |
8059fb19 RM |
5985 | #undef TARGET_LITTLE_NAME |
5986 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" | |
5987 | #undef elf32_bed | |
5988 | #define elf32_bed elf32_x86_64_nacl_bed | |
5989 | ||
5990 | #define bfd_elf32_bfd_link_hash_table_create \ | |
5991 | elf_x86_64_link_hash_table_create | |
8059fb19 RM |
5992 | #define bfd_elf32_bfd_reloc_type_lookup \ |
5993 | elf_x86_64_reloc_type_lookup | |
5994 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
5995 | elf_x86_64_reloc_name_lookup | |
5996 | #define bfd_elf32_mkobject \ | |
5997 | elf_x86_64_mkobject | |
5998 | ||
5999 | #undef elf_backend_object_p | |
6000 | #define elf_backend_object_p \ | |
64b384e1 | 6001 | elf32_x86_64_nacl_elf_object_p |
8059fb19 RM |
6002 | |
6003 | #undef elf_backend_bfd_from_remote_memory | |
6004 | #define elf_backend_bfd_from_remote_memory \ | |
6005 | _bfd_elf32_bfd_from_remote_memory | |
6006 | ||
6007 | #undef elf_backend_size_info | |
6008 | #define elf_backend_size_info \ | |
6009 | _bfd_elf32_size_info | |
6010 | ||
6011 | #include "elf32-target.h" | |
6012 | ||
6013 | /* Restore defaults. */ | |
5a68afcf | 6014 | #undef elf_backend_object_p |
8059fb19 | 6015 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
6016 | #undef elf_backend_bfd_from_remote_memory |
6017 | #undef elf_backend_size_info | |
6018 | #undef elf_backend_modify_segment_map | |
6019 | #undef elf_backend_modify_program_headers | |
887badb3 | 6020 | #undef elf_backend_final_write_processing |
8059fb19 | 6021 | |
8a9036a4 L |
6022 | /* Intel L1OM support. */ |
6023 | ||
6024 | static bfd_boolean | |
6025 | elf64_l1om_elf_object_p (bfd *abfd) | |
6026 | { | |
6027 | /* Set the right machine number for an L1OM elf64 file. */ | |
6028 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
6029 | return TRUE; | |
6030 | } | |
6031 | ||
6032 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6033 | #define TARGET_LITTLE_SYM l1om_elf64_vec |
8a9036a4 L |
6034 | #undef TARGET_LITTLE_NAME |
6035 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
6036 | #undef ELF_ARCH | |
6037 | #define ELF_ARCH bfd_arch_l1om | |
6038 | ||
6039 | #undef ELF_MACHINE_CODE | |
6040 | #define ELF_MACHINE_CODE EM_L1OM | |
6041 | ||
6042 | #undef ELF_OSABI | |
6043 | ||
6044 | #undef elf64_bed | |
6045 | #define elf64_bed elf64_l1om_bed | |
6046 | ||
6047 | #undef elf_backend_object_p | |
6048 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
6049 | ||
8059fb19 RM |
6050 | /* Restore defaults. */ |
6051 | #undef ELF_MAXPAGESIZE | |
6052 | #undef ELF_MINPAGESIZE | |
6053 | #undef ELF_COMMONPAGESIZE | |
6054 | #define ELF_MAXPAGESIZE 0x200000 | |
6055 | #define ELF_MINPAGESIZE 0x1000 | |
6056 | #define ELF_COMMONPAGESIZE 0x1000 | |
6057 | #undef elf_backend_plt_alignment | |
6058 | #define elf_backend_plt_alignment 4 | |
6059 | #undef elf_backend_arch_data | |
6060 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 6061 | |
8a9036a4 L |
6062 | #include "elf64-target.h" |
6063 | ||
6064 | /* FreeBSD L1OM support. */ | |
6065 | ||
6066 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6067 | #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec |
8a9036a4 L |
6068 | #undef TARGET_LITTLE_NAME |
6069 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
6070 | ||
6071 | #undef ELF_OSABI | |
6072 | #define ELF_OSABI ELFOSABI_FREEBSD | |
6073 | ||
6074 | #undef elf64_bed | |
6075 | #define elf64_bed elf64_l1om_fbsd_bed | |
6076 | ||
8a9036a4 | 6077 | #include "elf64-target.h" |
351f65ca | 6078 | |
7a9068fe L |
6079 | /* Intel K1OM support. */ |
6080 | ||
6081 | static bfd_boolean | |
6082 | elf64_k1om_elf_object_p (bfd *abfd) | |
6083 | { | |
6084 | /* Set the right machine number for an K1OM elf64 file. */ | |
6085 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
6086 | return TRUE; | |
6087 | } | |
6088 | ||
6089 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6090 | #define TARGET_LITTLE_SYM k1om_elf64_vec |
7a9068fe L |
6091 | #undef TARGET_LITTLE_NAME |
6092 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
6093 | #undef ELF_ARCH | |
6094 | #define ELF_ARCH bfd_arch_k1om | |
6095 | ||
6096 | #undef ELF_MACHINE_CODE | |
6097 | #define ELF_MACHINE_CODE EM_K1OM | |
6098 | ||
6099 | #undef ELF_OSABI | |
6100 | ||
6101 | #undef elf64_bed | |
6102 | #define elf64_bed elf64_k1om_bed | |
6103 | ||
6104 | #undef elf_backend_object_p | |
6105 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
6106 | ||
6107 | #undef elf_backend_static_tls_alignment | |
6108 | ||
6109 | #undef elf_backend_want_plt_sym | |
6110 | #define elf_backend_want_plt_sym 0 | |
6111 | ||
6112 | #include "elf64-target.h" | |
6113 | ||
6114 | /* FreeBSD K1OM support. */ | |
6115 | ||
6116 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6117 | #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec |
7a9068fe L |
6118 | #undef TARGET_LITTLE_NAME |
6119 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
6120 | ||
6121 | #undef ELF_OSABI | |
6122 | #define ELF_OSABI ELFOSABI_FREEBSD | |
6123 | ||
6124 | #undef elf64_bed | |
6125 | #define elf64_bed elf64_k1om_fbsd_bed | |
6126 | ||
6127 | #include "elf64-target.h" | |
6128 | ||
351f65ca L |
6129 | /* 32bit x86-64 support. */ |
6130 | ||
351f65ca | 6131 | #undef TARGET_LITTLE_SYM |
6d00b590 | 6132 | #define TARGET_LITTLE_SYM x86_64_elf32_vec |
351f65ca L |
6133 | #undef TARGET_LITTLE_NAME |
6134 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 6135 | #undef elf32_bed |
351f65ca L |
6136 | |
6137 | #undef ELF_ARCH | |
6138 | #define ELF_ARCH bfd_arch_i386 | |
6139 | ||
6140 | #undef ELF_MACHINE_CODE | |
6141 | #define ELF_MACHINE_CODE EM_X86_64 | |
6142 | ||
351f65ca L |
6143 | #undef ELF_OSABI |
6144 | ||
351f65ca L |
6145 | #undef elf_backend_object_p |
6146 | #define elf_backend_object_p \ | |
6147 | elf32_x86_64_elf_object_p | |
6148 | ||
6149 | #undef elf_backend_bfd_from_remote_memory | |
6150 | #define elf_backend_bfd_from_remote_memory \ | |
6151 | _bfd_elf32_bfd_from_remote_memory | |
6152 | ||
6153 | #undef elf_backend_size_info | |
6154 | #define elf_backend_size_info \ | |
6155 | _bfd_elf32_size_info | |
6156 | ||
6157 | #include "elf32-target.h" |