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351f65ca | 1 | /* X86-64 specific support for ELF |
4dfe6ac6 | 2 | Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, |
3ce231f8 | 3 | 2010, 2011, 2012 |
9f973f28 | 4 | Free Software Foundation, Inc. |
8d88c4ca NC |
5 | Contributed by Jan Hubicka <jh@suse.cz>. |
6 | ||
ae9a127f | 7 | This file is part of BFD, the Binary File Descriptor library. |
8d88c4ca | 8 | |
ae9a127f NC |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 11 | the Free Software Foundation; either version 3 of the License, or |
ae9a127f | 12 | (at your option) any later version. |
8d88c4ca | 13 | |
ae9a127f NC |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
8d88c4ca | 18 | |
ae9a127f NC |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
21 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
22 | MA 02110-1301, USA. */ | |
8d88c4ca | 23 | |
8d88c4ca | 24 | #include "sysdep.h" |
3db64b00 | 25 | #include "bfd.h" |
c434dee6 | 26 | #include "bfdlink.h" |
8d88c4ca NC |
27 | #include "libbfd.h" |
28 | #include "elf-bfd.h" | |
5a68afcf | 29 | #include "elf-nacl.h" |
142411ca | 30 | #include "bfd_stdint.h" |
c25bc9fc L |
31 | #include "objalloc.h" |
32 | #include "hashtab.h" | |
e41b3a13 | 33 | #include "dwarf2.h" |
d7921315 | 34 | #include "libiberty.h" |
8d88c4ca NC |
35 | |
36 | #include "elf/x86-64.h" | |
37 | ||
8fd79e71 L |
38 | #ifdef CORE_HEADER |
39 | #include <stdarg.h> | |
40 | #include CORE_HEADER | |
41 | #endif | |
42 | ||
8d88c4ca NC |
43 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
44 | #define MINUS_ONE (~ (bfd_vma) 0) | |
45 | ||
351f65ca L |
46 | /* Since both 32-bit and 64-bit x86-64 encode relocation type in the |
47 | identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get | |
48 | relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE | |
49 | since they are the same. */ | |
50 | ||
51 | #define ABI_64_P(abfd) \ | |
52 | (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64) | |
53 | ||
8d88c4ca | 54 | /* The relocation "howto" table. Order of fields: |
7b81dfbb AJ |
55 | type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow, |
56 | special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */ | |
70256ad8 AJ |
57 | static reloc_howto_type x86_64_elf_howto_table[] = |
58 | { | |
b34976b6 AM |
59 | HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
60 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, | |
61 | FALSE), | |
62 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
63 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, | |
64 | FALSE), | |
65 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
66 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, | |
67 | TRUE), | |
68 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
69 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, | |
70 | FALSE), | |
71 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
72 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, | |
73 | TRUE), | |
74 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
75 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, | |
76 | FALSE), | |
77 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
78 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, | |
79 | MINUS_ONE, FALSE), | |
80 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
81 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, | |
82 | MINUS_ONE, FALSE), | |
83 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
84 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, | |
85 | MINUS_ONE, FALSE), | |
86 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
87 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, | |
88 | 0xffffffff, TRUE), | |
89 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, | |
90 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
91 | FALSE), | |
92 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
93 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, | |
94 | FALSE), | |
95 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
96 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), | |
b0360d8c | 97 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
b34976b6 | 98 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), |
ac2aa337 | 99 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
b34976b6 AM |
100 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), |
101 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
102 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), | |
103 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
104 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, | |
105 | MINUS_ONE, FALSE), | |
106 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
107 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, | |
108 | MINUS_ONE, FALSE), | |
109 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
110 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, | |
111 | MINUS_ONE, FALSE), | |
112 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
113 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, | |
114 | 0xffffffff, TRUE), | |
115 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
116 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, | |
117 | 0xffffffff, TRUE), | |
ac2aa337 | 118 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
b34976b6 AM |
119 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, |
120 | 0xffffffff, FALSE), | |
121 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
122 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, | |
123 | 0xffffffff, TRUE), | |
124 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
125 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, | |
126 | 0xffffffff, FALSE), | |
d6ab8113 JB |
127 | HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
128 | bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE, | |
129 | TRUE), | |
130 | HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
131 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", | |
132 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
133 | HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
134 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", | |
135 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
7b81dfbb AJ |
136 | HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, |
137 | bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE, | |
138 | FALSE), | |
139 | HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
140 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE, | |
141 | MINUS_ONE, TRUE), | |
142 | HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
143 | bfd_elf_generic_reloc, "R_X86_64_GOTPC64", | |
144 | FALSE, MINUS_ONE, MINUS_ONE, TRUE), | |
145 | HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
146 | bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE, | |
147 | MINUS_ONE, FALSE), | |
148 | HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
149 | bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE, | |
150 | MINUS_ONE, FALSE), | |
1788fc08 L |
151 | HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, |
152 | bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff, | |
153 | FALSE), | |
154 | HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned, | |
155 | bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE, | |
156 | FALSE), | |
67a4f2b7 AO |
157 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0, |
158 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
159 | "R_X86_64_GOTPC32_TLSDESC", | |
160 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
161 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0, | |
162 | complain_overflow_dont, bfd_elf_generic_reloc, | |
163 | "R_X86_64_TLSDESC_CALL", | |
164 | FALSE, 0, 0, FALSE), | |
165 | HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0, | |
166 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
167 | "R_X86_64_TLSDESC", | |
168 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
cbe950e9 L |
169 | HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
170 | bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE, | |
171 | MINUS_ONE, FALSE), | |
64d25c44 L |
172 | HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
173 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE, | |
174 | MINUS_ONE, FALSE), | |
fe4770f4 | 175 | |
a33d77bc JB |
176 | /* We have a gap in the reloc numbers here. |
177 | R_X86_64_standard counts the number up to this point, and | |
178 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
179 | R_X86_64_GNU_VT* to form an index into this table. */ | |
1e536451 | 180 | #define R_X86_64_standard (R_X86_64_RELATIVE64 + 1) |
a33d77bc JB |
181 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
182 | ||
fe4770f4 | 183 | /* GNU extension to record C++ vtable hierarchy. */ |
b34976b6 AM |
184 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
185 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
186 | |
187 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
188 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
189 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
d7921315 L |
190 | FALSE), |
191 | ||
192 | /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */ | |
193 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
194 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
195 | FALSE) | |
8d88c4ca NC |
196 | }; |
197 | ||
d8045f23 NC |
198 | #define IS_X86_64_PCREL_TYPE(TYPE) \ |
199 | ( ((TYPE) == R_X86_64_PC8) \ | |
200 | || ((TYPE) == R_X86_64_PC16) \ | |
201 | || ((TYPE) == R_X86_64_PC32) \ | |
202 | || ((TYPE) == R_X86_64_PC64)) | |
203 | ||
8d88c4ca | 204 | /* Map BFD relocs to the x86_64 elf relocs. */ |
70256ad8 AJ |
205 | struct elf_reloc_map |
206 | { | |
8d88c4ca NC |
207 | bfd_reloc_code_real_type bfd_reloc_val; |
208 | unsigned char elf_reloc_val; | |
209 | }; | |
210 | ||
dc810e39 | 211 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 212 | { |
70256ad8 AJ |
213 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
214 | { BFD_RELOC_64, R_X86_64_64, }, | |
215 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
216 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
217 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
218 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
219 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
220 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
221 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
222 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
223 | { BFD_RELOC_32, R_X86_64_32, }, | |
224 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
225 | { BFD_RELOC_16, R_X86_64_16, }, | |
226 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
227 | { BFD_RELOC_8, R_X86_64_8, }, | |
228 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
229 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
230 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
231 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
232 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
233 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
234 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
235 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
236 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
237 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
238 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
239 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
240 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
241 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
242 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
243 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
244 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
1788fc08 L |
245 | { BFD_RELOC_SIZE32, R_X86_64_SIZE32, }, |
246 | { BFD_RELOC_SIZE64, R_X86_64_SIZE64, }, | |
67a4f2b7 AO |
247 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
248 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
249 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
cbe950e9 | 250 | { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, }, |
fe4770f4 AJ |
251 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
252 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
253 | }; |
254 | ||
67a4f2b7 | 255 | static reloc_howto_type * |
351f65ca | 256 | elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) |
67a4f2b7 AO |
257 | { |
258 | unsigned i; | |
259 | ||
d7921315 L |
260 | if (r_type == (unsigned int) R_X86_64_32) |
261 | { | |
262 | if (ABI_64_P (abfd)) | |
263 | i = r_type; | |
264 | else | |
265 | i = ARRAY_SIZE (x86_64_elf_howto_table) - 1; | |
266 | } | |
267 | else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
268 | || r_type >= (unsigned int) R_X86_64_max) | |
67a4f2b7 AO |
269 | { |
270 | if (r_type >= (unsigned int) R_X86_64_standard) | |
271 | { | |
272 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), | |
273 | abfd, (int) r_type); | |
274 | r_type = R_X86_64_NONE; | |
275 | } | |
276 | i = r_type; | |
277 | } | |
278 | else | |
279 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
280 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
281 | return &x86_64_elf_howto_table[i]; | |
282 | } | |
8d88c4ca NC |
283 | |
284 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
285 | static reloc_howto_type * | |
351f65ca L |
286 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
287 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
288 | { |
289 | unsigned int i; | |
27482721 | 290 | |
8d88c4ca NC |
291 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
292 | i++) | |
293 | { | |
294 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
295 | return elf_x86_64_rtype_to_howto (abfd, |
296 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca NC |
297 | } |
298 | return 0; | |
299 | } | |
300 | ||
157090f7 | 301 | static reloc_howto_type * |
d7921315 | 302 | elf_x86_64_reloc_name_lookup (bfd *abfd, |
351f65ca | 303 | const char *r_name) |
157090f7 AM |
304 | { |
305 | unsigned int i; | |
306 | ||
d7921315 L |
307 | if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0) |
308 | { | |
309 | /* Get x32 R_X86_64_32. */ | |
310 | reloc_howto_type *reloc | |
311 | = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1]; | |
312 | BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32); | |
313 | return reloc; | |
314 | } | |
315 | ||
316 | for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++) | |
157090f7 AM |
317 | if (x86_64_elf_howto_table[i].name != NULL |
318 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
319 | return &x86_64_elf_howto_table[i]; | |
320 | ||
321 | return NULL; | |
322 | } | |
323 | ||
8d88c4ca | 324 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 325 | |
8d88c4ca | 326 | static void |
351f65ca L |
327 | elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
328 | Elf_Internal_Rela *dst) | |
8d88c4ca | 329 | { |
67a4f2b7 | 330 | unsigned r_type; |
8d88c4ca | 331 | |
351f65ca L |
332 | r_type = ELF32_R_TYPE (dst->r_info); |
333 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); | |
8d88c4ca NC |
334 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
335 | } | |
70256ad8 | 336 | \f |
3bab7989 | 337 | /* Support for core dump NOTE sections. */ |
b34976b6 | 338 | static bfd_boolean |
351f65ca | 339 | elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
340 | { |
341 | int offset; | |
eea6121a | 342 | size_t size; |
3bab7989 ML |
343 | |
344 | switch (note->descsz) | |
345 | { | |
346 | default: | |
b34976b6 | 347 | return FALSE; |
3bab7989 | 348 | |
bcd823f1 L |
349 | case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */ |
350 | /* pr_cursig */ | |
351 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); | |
352 | ||
353 | /* pr_pid */ | |
354 | elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24); | |
355 | ||
356 | /* pr_reg */ | |
357 | offset = 72; | |
358 | size = 216; | |
359 | ||
360 | break; | |
361 | ||
3bab7989 ML |
362 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ |
363 | /* pr_cursig */ | |
cedb70c5 | 364 | elf_tdata (abfd)->core_signal |
3bab7989 ML |
365 | = bfd_get_16 (abfd, note->descdata + 12); |
366 | ||
367 | /* pr_pid */ | |
261b8d08 | 368 | elf_tdata (abfd)->core_lwpid |
3bab7989 ML |
369 | = bfd_get_32 (abfd, note->descdata + 32); |
370 | ||
371 | /* pr_reg */ | |
372 | offset = 112; | |
eea6121a | 373 | size = 216; |
3bab7989 ML |
374 | |
375 | break; | |
376 | } | |
377 | ||
378 | /* Make a ".reg/999" section. */ | |
379 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 380 | size, note->descpos + offset); |
3bab7989 ML |
381 | } |
382 | ||
b34976b6 | 383 | static bfd_boolean |
351f65ca | 384 | elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
385 | { |
386 | switch (note->descsz) | |
387 | { | |
388 | default: | |
b34976b6 | 389 | return FALSE; |
3bab7989 | 390 | |
bcd823f1 L |
391 | case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */ |
392 | elf_tdata (abfd)->core_pid | |
393 | = bfd_get_32 (abfd, note->descdata + 12); | |
394 | elf_tdata (abfd)->core_program | |
395 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); | |
396 | elf_tdata (abfd)->core_command | |
397 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); | |
398 | break; | |
399 | ||
3bab7989 | 400 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ |
261b8d08 PA |
401 | elf_tdata (abfd)->core_pid |
402 | = bfd_get_32 (abfd, note->descdata + 24); | |
3bab7989 ML |
403 | elf_tdata (abfd)->core_program |
404 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); | |
405 | elf_tdata (abfd)->core_command | |
406 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); | |
407 | } | |
408 | ||
409 | /* Note that for some reason, a spurious space is tacked | |
410 | onto the end of the args in some (at least one anyway) | |
411 | implementations, so strip it off if it exists. */ | |
412 | ||
413 | { | |
414 | char *command = elf_tdata (abfd)->core_command; | |
415 | int n = strlen (command); | |
416 | ||
417 | if (0 < n && command[n - 1] == ' ') | |
418 | command[n - 1] = '\0'; | |
419 | } | |
420 | ||
b34976b6 | 421 | return TRUE; |
3bab7989 | 422 | } |
8fd79e71 L |
423 | |
424 | #ifdef CORE_HEADER | |
425 | static char * | |
426 | elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz, | |
427 | int note_type, ...) | |
428 | { | |
429 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8fd79e71 L |
430 | va_list ap; |
431 | const char *fname, *psargs; | |
432 | long pid; | |
433 | int cursig; | |
434 | const void *gregs; | |
435 | ||
436 | switch (note_type) | |
437 | { | |
438 | default: | |
439 | return NULL; | |
440 | ||
441 | case NT_PRPSINFO: | |
442 | va_start (ap, note_type); | |
443 | fname = va_arg (ap, const char *); | |
444 | psargs = va_arg (ap, const char *); | |
445 | va_end (ap); | |
446 | ||
447 | if (bed->s->elfclass == ELFCLASS32) | |
448 | { | |
449 | prpsinfo32_t data; | |
450 | memset (&data, 0, sizeof (data)); | |
451 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
452 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
453 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
454 | &data, sizeof (data)); | |
8fd79e71 L |
455 | } |
456 | else | |
457 | { | |
b1bd052d | 458 | prpsinfo64_t data; |
8fd79e71 L |
459 | memset (&data, 0, sizeof (data)); |
460 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
461 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
462 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
463 | &data, sizeof (data)); | |
8fd79e71 | 464 | } |
e85c6a70 | 465 | /* NOTREACHED */ |
8fd79e71 L |
466 | |
467 | case NT_PRSTATUS: | |
468 | va_start (ap, note_type); | |
469 | pid = va_arg (ap, long); | |
470 | cursig = va_arg (ap, int); | |
471 | gregs = va_arg (ap, const void *); | |
472 | va_end (ap); | |
473 | ||
474 | if (bed->s->elfclass == ELFCLASS32) | |
475 | { | |
476 | if (bed->elf_machine_code == EM_X86_64) | |
477 | { | |
478 | prstatusx32_t prstat; | |
479 | memset (&prstat, 0, sizeof (prstat)); | |
480 | prstat.pr_pid = pid; | |
481 | prstat.pr_cursig = cursig; | |
482 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
483 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
484 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
485 | } |
486 | else | |
487 | { | |
488 | prstatus32_t prstat; | |
489 | memset (&prstat, 0, sizeof (prstat)); | |
490 | prstat.pr_pid = pid; | |
491 | prstat.pr_cursig = cursig; | |
492 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
493 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
494 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
495 | } |
496 | } | |
497 | else | |
498 | { | |
b1bd052d | 499 | prstatus64_t prstat; |
8fd79e71 L |
500 | memset (&prstat, 0, sizeof (prstat)); |
501 | prstat.pr_pid = pid; | |
502 | prstat.pr_cursig = cursig; | |
503 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
504 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
505 | &prstat, sizeof (prstat)); | |
8fd79e71 | 506 | } |
8fd79e71 | 507 | } |
e85c6a70 | 508 | /* NOTREACHED */ |
8fd79e71 L |
509 | } |
510 | #endif | |
3bab7989 | 511 | \f |
407443a3 | 512 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 513 | |
407443a3 | 514 | /* The name of the dynamic interpreter. This is put in the .interp |
70256ad8 AJ |
515 | section. */ |
516 | ||
351f65ca | 517 | #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
eec9dd95 | 518 | #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1" |
70256ad8 | 519 | |
d40d037c AJ |
520 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
521 | copying dynamic variables from a shared lib into an app's dynbss | |
522 | section, and instead use a dynamic relocation to point into the | |
523 | shared lib. */ | |
524 | #define ELIMINATE_COPY_RELOCS 1 | |
525 | ||
70256ad8 AJ |
526 | /* The size in bytes of an entry in the global offset table. */ |
527 | ||
528 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 529 | |
70256ad8 | 530 | /* The size in bytes of an entry in the procedure linkage table. */ |
8d88c4ca | 531 | |
70256ad8 AJ |
532 | #define PLT_ENTRY_SIZE 16 |
533 | ||
534 | /* The first entry in a procedure linkage table looks like this. See the | |
535 | SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */ | |
536 | ||
351f65ca | 537 | static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] = |
70256ad8 | 538 | { |
653165cc AJ |
539 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
540 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 541 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
542 | }; |
543 | ||
544 | /* Subsequent entries in a procedure linkage table look like this. */ | |
545 | ||
351f65ca | 546 | static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] = |
70256ad8 | 547 | { |
653165cc | 548 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 549 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 550 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
551 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
552 | 0xe9, /* jmp relative */ | |
553 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
554 | }; | |
555 | ||
e41b3a13 JJ |
556 | /* .eh_frame covering the .plt section. */ |
557 | ||
558 | static const bfd_byte elf_x86_64_eh_frame_plt[] = | |
559 | { | |
560 | #define PLT_CIE_LENGTH 20 | |
561 | #define PLT_FDE_LENGTH 36 | |
562 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
563 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
564 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
565 | 0, 0, 0, 0, /* CIE ID */ | |
566 | 1, /* CIE version */ | |
567 | 'z', 'R', 0, /* Augmentation string */ | |
568 | 1, /* Code alignment factor */ | |
569 | 0x78, /* Data alignment factor */ | |
570 | 16, /* Return address column */ | |
571 | 1, /* Augmentation size */ | |
572 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
573 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
574 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
575 | DW_CFA_nop, DW_CFA_nop, | |
576 | ||
577 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
578 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
579 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
580 | 0, 0, 0, 0, /* .plt size goes here */ | |
581 | 0, /* Augmentation size */ | |
582 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
583 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
584 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
585 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
586 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
587 | 11, /* Block length */ | |
588 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
589 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
590 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
591 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
592 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
593 | }; | |
594 | ||
eed180f8 RM |
595 | /* Architecture-specific backend data for x86-64. */ |
596 | ||
597 | struct elf_x86_64_backend_data | |
598 | { | |
599 | /* Templates for the initial PLT entry and for subsequent entries. */ | |
600 | const bfd_byte *plt0_entry; | |
601 | const bfd_byte *plt_entry; | |
602 | unsigned int plt_entry_size; /* Size of each PLT entry. */ | |
603 | ||
604 | /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */ | |
605 | unsigned int plt0_got1_offset; | |
606 | unsigned int plt0_got2_offset; | |
607 | ||
608 | /* Offset of the end of the PC-relative instruction containing | |
609 | plt0_got2_offset. */ | |
610 | unsigned int plt0_got2_insn_end; | |
611 | ||
612 | /* Offsets into plt_entry that are to be replaced with... */ | |
613 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
614 | unsigned int plt_reloc_offset; /* ... offset into relocation table. */ | |
615 | unsigned int plt_plt_offset; /* ... offset to start of .plt. */ | |
616 | ||
617 | /* Length of the PC-relative instruction containing plt_got_offset. */ | |
618 | unsigned int plt_got_insn_size; | |
619 | ||
620 | /* Offset of the end of the PC-relative jump to plt0_entry. */ | |
621 | unsigned int plt_plt_insn_end; | |
622 | ||
623 | /* Offset into plt_entry where the initial value of the GOT entry points. */ | |
624 | unsigned int plt_lazy_offset; | |
625 | ||
626 | /* .eh_frame covering the .plt section. */ | |
627 | const bfd_byte *eh_frame_plt; | |
628 | unsigned int eh_frame_plt_size; | |
629 | }; | |
630 | ||
631 | #define get_elf_x86_64_backend_data(abfd) \ | |
632 | ((const struct elf_x86_64_backend_data *) \ | |
633 | get_elf_backend_data (abfd)->arch_data) | |
634 | ||
635 | #define GET_PLT_ENTRY_SIZE(abfd) \ | |
636 | get_elf_x86_64_backend_data (abfd)->plt_entry_size | |
637 | ||
638 | /* These are the standard parameters. */ | |
639 | static const struct elf_x86_64_backend_data elf_x86_64_arch_bed = | |
640 | { | |
641 | elf_x86_64_plt0_entry, /* plt0_entry */ | |
642 | elf_x86_64_plt_entry, /* plt_entry */ | |
643 | sizeof (elf_x86_64_plt_entry), /* plt_entry_size */ | |
644 | 2, /* plt0_got1_offset */ | |
645 | 8, /* plt0_got2_offset */ | |
646 | 12, /* plt0_got2_insn_end */ | |
647 | 2, /* plt_got_offset */ | |
648 | 7, /* plt_reloc_offset */ | |
649 | 12, /* plt_plt_offset */ | |
650 | 6, /* plt_got_insn_size */ | |
651 | PLT_ENTRY_SIZE, /* plt_plt_insn_end */ | |
652 | 6, /* plt_lazy_offset */ | |
653 | elf_x86_64_eh_frame_plt, /* eh_frame_plt */ | |
654 | sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */ | |
655 | }; | |
656 | ||
657 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
658 | ||
70256ad8 AJ |
659 | /* x86-64 ELF linker hash entry. */ |
660 | ||
351f65ca | 661 | struct elf_x86_64_link_hash_entry |
70256ad8 | 662 | { |
c434dee6 | 663 | struct elf_link_hash_entry elf; |
70256ad8 | 664 | |
c434dee6 | 665 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 666 | struct elf_dyn_relocs *dyn_relocs; |
bffbf940 JJ |
667 | |
668 | #define GOT_UNKNOWN 0 | |
669 | #define GOT_NORMAL 1 | |
670 | #define GOT_TLS_GD 2 | |
671 | #define GOT_TLS_IE 3 | |
67a4f2b7 AO |
672 | #define GOT_TLS_GDESC 4 |
673 | #define GOT_TLS_GD_BOTH_P(type) \ | |
674 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
675 | #define GOT_TLS_GD_P(type) \ | |
676 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
677 | #define GOT_TLS_GDESC_P(type) \ | |
678 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
679 | #define GOT_TLS_GD_ANY_P(type) \ | |
680 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
bffbf940 | 681 | unsigned char tls_type; |
67a4f2b7 AO |
682 | |
683 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, | |
684 | starting at the end of the jump table. */ | |
685 | bfd_vma tlsdesc_got; | |
bffbf940 JJ |
686 | }; |
687 | ||
351f65ca L |
688 | #define elf_x86_64_hash_entry(ent) \ |
689 | ((struct elf_x86_64_link_hash_entry *)(ent)) | |
bffbf940 | 690 | |
351f65ca | 691 | struct elf_x86_64_obj_tdata |
bffbf940 JJ |
692 | { |
693 | struct elf_obj_tdata root; | |
694 | ||
695 | /* tls_type for each local got entry. */ | |
696 | char *local_got_tls_type; | |
67a4f2b7 AO |
697 | |
698 | /* GOTPLT entries for TLS descriptors. */ | |
699 | bfd_vma *local_tlsdesc_gotent; | |
70256ad8 AJ |
700 | }; |
701 | ||
351f65ca L |
702 | #define elf_x86_64_tdata(abfd) \ |
703 | ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any) | |
bffbf940 | 704 | |
351f65ca L |
705 | #define elf_x86_64_local_got_tls_type(abfd) \ |
706 | (elf_x86_64_tdata (abfd)->local_got_tls_type) | |
bffbf940 | 707 | |
351f65ca L |
708 | #define elf_x86_64_local_tlsdesc_gotent(abfd) \ |
709 | (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent) | |
bffbf940 | 710 | |
0ffa91dd NC |
711 | #define is_x86_64_elf(bfd) \ |
712 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
713 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 714 | && elf_object_id (bfd) == X86_64_ELF_DATA) |
0ffa91dd NC |
715 | |
716 | static bfd_boolean | |
351f65ca | 717 | elf_x86_64_mkobject (bfd *abfd) |
0ffa91dd | 718 | { |
351f65ca | 719 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata), |
4dfe6ac6 | 720 | X86_64_ELF_DATA); |
0ffa91dd NC |
721 | } |
722 | ||
c434dee6 | 723 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 724 | |
351f65ca | 725 | struct elf_x86_64_link_hash_table |
407443a3 | 726 | { |
c434dee6 | 727 | struct elf_link_hash_table elf; |
70256ad8 | 728 | |
c434dee6 | 729 | /* Short-cuts to get to dynamic linker sections. */ |
c434dee6 AJ |
730 | asection *sdynbss; |
731 | asection *srelbss; | |
e41b3a13 | 732 | asection *plt_eh_frame; |
70256ad8 | 733 | |
4dfe6ac6 NC |
734 | union |
735 | { | |
bffbf940 JJ |
736 | bfd_signed_vma refcount; |
737 | bfd_vma offset; | |
738 | } tls_ld_got; | |
739 | ||
67a4f2b7 AO |
740 | /* The amount of space used by the jump slots in the GOT. */ |
741 | bfd_vma sgotplt_jump_table_size; | |
742 | ||
87d72d41 AM |
743 | /* Small local sym cache. */ |
744 | struct sym_cache sym_cache; | |
9f03412a | 745 | |
351f65ca L |
746 | bfd_vma (*r_info) (bfd_vma, bfd_vma); |
747 | bfd_vma (*r_sym) (bfd_vma); | |
248775ba | 748 | unsigned int pointer_r_type; |
351f65ca L |
749 | const char *dynamic_interpreter; |
750 | int dynamic_interpreter_size; | |
751 | ||
9f03412a AO |
752 | /* _TLS_MODULE_BASE_ symbol. */ |
753 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
754 | |
755 | /* Used by local STT_GNU_IFUNC symbols. */ | |
756 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
757 | void * loc_hash_memory; |
758 | ||
759 | /* The offset into splt of the PLT entry for the TLS descriptor | |
760 | resolver. Special values are 0, if not necessary (or not found | |
761 | to be necessary yet), and -1 if needed but not determined | |
762 | yet. */ | |
763 | bfd_vma tlsdesc_plt; | |
764 | /* The offset into sgot of the GOT entry used by the PLT entry | |
765 | above. */ | |
766 | bfd_vma tlsdesc_got; | |
e1f98742 L |
767 | |
768 | /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */ | |
769 | bfd_vma next_jump_slot_index; | |
770 | /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */ | |
771 | bfd_vma next_irelative_index; | |
c434dee6 | 772 | }; |
70256ad8 AJ |
773 | |
774 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca | 775 | |
351f65ca | 776 | #define elf_x86_64_hash_table(p) \ |
4dfe6ac6 | 777 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
351f65ca | 778 | == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL) |
8d88c4ca | 779 | |
351f65ca | 780 | #define elf_x86_64_compute_jump_table_size(htab) \ |
6de2ae4a | 781 | ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE) |
67a4f2b7 | 782 | |
407443a3 | 783 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
784 | |
785 | static struct bfd_hash_entry * | |
351f65ca L |
786 | elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry, |
787 | struct bfd_hash_table *table, | |
788 | const char *string) | |
70256ad8 | 789 | { |
70256ad8 | 790 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
791 | subclass. */ |
792 | if (entry == NULL) | |
793 | { | |
a50b1753 | 794 | entry = (struct bfd_hash_entry *) |
eed180f8 RM |
795 | bfd_hash_allocate (table, |
796 | sizeof (struct elf_x86_64_link_hash_entry)); | |
c434dee6 AJ |
797 | if (entry == NULL) |
798 | return entry; | |
799 | } | |
70256ad8 AJ |
800 | |
801 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
802 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
803 | if (entry != NULL) | |
70256ad8 | 804 | { |
351f65ca | 805 | struct elf_x86_64_link_hash_entry *eh; |
c434dee6 | 806 | |
351f65ca | 807 | eh = (struct elf_x86_64_link_hash_entry *) entry; |
c434dee6 | 808 | eh->dyn_relocs = NULL; |
bffbf940 | 809 | eh->tls_type = GOT_UNKNOWN; |
67a4f2b7 | 810 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
811 | } |
812 | ||
c434dee6 | 813 | return entry; |
70256ad8 AJ |
814 | } |
815 | ||
c25bc9fc L |
816 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
817 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
818 | as global symbol. We reuse indx and dynstr_index for local symbol | |
819 | hash since they aren't used by global symbols in this backend. */ | |
820 | ||
821 | static hashval_t | |
351f65ca | 822 | elf_x86_64_local_htab_hash (const void *ptr) |
c25bc9fc L |
823 | { |
824 | struct elf_link_hash_entry *h | |
825 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 826 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
827 | } |
828 | ||
829 | /* Compare local hash entries. */ | |
830 | ||
831 | static int | |
351f65ca | 832 | elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2) |
c25bc9fc L |
833 | { |
834 | struct elf_link_hash_entry *h1 | |
835 | = (struct elf_link_hash_entry *) ptr1; | |
836 | struct elf_link_hash_entry *h2 | |
837 | = (struct elf_link_hash_entry *) ptr2; | |
838 | ||
839 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
840 | } | |
841 | ||
842 | /* Find and/or create a hash entry for local symbol. */ | |
843 | ||
844 | static struct elf_link_hash_entry * | |
351f65ca L |
845 | elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab, |
846 | bfd *abfd, const Elf_Internal_Rela *rel, | |
847 | bfd_boolean create) | |
c25bc9fc | 848 | { |
351f65ca | 849 | struct elf_x86_64_link_hash_entry e, *ret; |
c25bc9fc | 850 | asection *sec = abfd->sections; |
d2149d72 | 851 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
351f65ca | 852 | htab->r_sym (rel->r_info)); |
c25bc9fc L |
853 | void **slot; |
854 | ||
855 | e.elf.indx = sec->id; | |
351f65ca | 856 | e.elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc L |
857 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, |
858 | create ? INSERT : NO_INSERT); | |
859 | ||
860 | if (!slot) | |
861 | return NULL; | |
862 | ||
863 | if (*slot) | |
864 | { | |
351f65ca | 865 | ret = (struct elf_x86_64_link_hash_entry *) *slot; |
c25bc9fc L |
866 | return &ret->elf; |
867 | } | |
868 | ||
351f65ca | 869 | ret = (struct elf_x86_64_link_hash_entry *) |
c25bc9fc | 870 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, |
351f65ca | 871 | sizeof (struct elf_x86_64_link_hash_entry)); |
c25bc9fc L |
872 | if (ret) |
873 | { | |
874 | memset (ret, 0, sizeof (*ret)); | |
875 | ret->elf.indx = sec->id; | |
351f65ca | 876 | ret->elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc | 877 | ret->elf.dynindx = -1; |
c25bc9fc L |
878 | *slot = ret; |
879 | } | |
880 | return &ret->elf; | |
881 | } | |
882 | ||
8d88c4ca NC |
883 | /* Create an X86-64 ELF linker hash table. */ |
884 | ||
885 | static struct bfd_link_hash_table * | |
351f65ca | 886 | elf_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca | 887 | { |
351f65ca L |
888 | struct elf_x86_64_link_hash_table *ret; |
889 | bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table); | |
8d88c4ca | 890 | |
351f65ca | 891 | ret = (struct elf_x86_64_link_hash_table *) bfd_malloc (amt); |
c434dee6 | 892 | if (ret == NULL) |
8d88c4ca NC |
893 | return NULL; |
894 | ||
eb4ff4d6 | 895 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
351f65ca L |
896 | elf_x86_64_link_hash_newfunc, |
897 | sizeof (struct elf_x86_64_link_hash_entry), | |
4dfe6ac6 | 898 | X86_64_ELF_DATA)) |
8d88c4ca | 899 | { |
e2d34d7d | 900 | free (ret); |
8d88c4ca NC |
901 | return NULL; |
902 | } | |
903 | ||
c434dee6 AJ |
904 | ret->sdynbss = NULL; |
905 | ret->srelbss = NULL; | |
332ce62b | 906 | ret->plt_eh_frame = NULL; |
87d72d41 | 907 | ret->sym_cache.abfd = NULL; |
67a4f2b7 AO |
908 | ret->tlsdesc_plt = 0; |
909 | ret->tlsdesc_got = 0; | |
bffbf940 | 910 | ret->tls_ld_got.refcount = 0; |
67a4f2b7 | 911 | ret->sgotplt_jump_table_size = 0; |
9f03412a | 912 | ret->tls_module_base = NULL; |
eed180f8 | 913 | ret->next_jump_slot_index = 0; |
e1f98742 | 914 | ret->next_irelative_index = 0; |
6bbec505 | 915 | |
351f65ca L |
916 | if (ABI_64_P (abfd)) |
917 | { | |
918 | ret->r_info = elf64_r_info; | |
919 | ret->r_sym = elf64_r_sym; | |
248775ba | 920 | ret->pointer_r_type = R_X86_64_64; |
351f65ca L |
921 | ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; |
922 | ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; | |
923 | } | |
924 | else | |
925 | { | |
926 | ret->r_info = elf32_r_info; | |
927 | ret->r_sym = elf32_r_sym; | |
248775ba | 928 | ret->pointer_r_type = R_X86_64_32; |
351f65ca L |
929 | ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; |
930 | ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER; | |
931 | } | |
932 | ||
c25bc9fc | 933 | ret->loc_hash_table = htab_try_create (1024, |
351f65ca L |
934 | elf_x86_64_local_htab_hash, |
935 | elf_x86_64_local_htab_eq, | |
c25bc9fc L |
936 | NULL); |
937 | ret->loc_hash_memory = objalloc_create (); | |
938 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
939 | { | |
940 | free (ret); | |
941 | return NULL; | |
942 | } | |
943 | ||
c434dee6 AJ |
944 | return &ret->elf.root; |
945 | } | |
946 | ||
c25bc9fc L |
947 | /* Destroy an X86-64 ELF linker hash table. */ |
948 | ||
949 | static void | |
351f65ca | 950 | elf_x86_64_link_hash_table_free (struct bfd_link_hash_table *hash) |
c25bc9fc | 951 | { |
351f65ca L |
952 | struct elf_x86_64_link_hash_table *htab |
953 | = (struct elf_x86_64_link_hash_table *) hash; | |
c25bc9fc L |
954 | |
955 | if (htab->loc_hash_table) | |
956 | htab_delete (htab->loc_hash_table); | |
957 | if (htab->loc_hash_memory) | |
958 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
959 | _bfd_generic_link_hash_table_free (hash); | |
960 | } | |
961 | ||
c434dee6 AJ |
962 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
963 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
964 | hash table. */ | |
965 | ||
b34976b6 | 966 | static bfd_boolean |
351f65ca L |
967 | elf_x86_64_create_dynamic_sections (bfd *dynobj, |
968 | struct bfd_link_info *info) | |
c434dee6 | 969 | { |
351f65ca | 970 | struct elf_x86_64_link_hash_table *htab; |
c434dee6 | 971 | |
c434dee6 | 972 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 973 | return FALSE; |
c434dee6 | 974 | |
351f65ca | 975 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
976 | if (htab == NULL) |
977 | return FALSE; | |
978 | ||
3d4d4302 | 979 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
c434dee6 | 980 | if (!info->shared) |
3d4d4302 | 981 | htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); |
c434dee6 | 982 | |
6de2ae4a | 983 | if (!htab->sdynbss |
c434dee6 AJ |
984 | || (!info->shared && !htab->srelbss)) |
985 | abort (); | |
986 | ||
e41b3a13 | 987 | if (!info->no_ld_generated_unwind_info |
2fe0fd06 | 988 | && htab->plt_eh_frame == NULL |
e4de50d4 | 989 | && htab->elf.splt != NULL) |
e41b3a13 | 990 | { |
bbf96e4e L |
991 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
992 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
993 | | SEC_LINKER_CREATED); | |
e41b3a13 | 994 | htab->plt_eh_frame |
bbf96e4e | 995 | = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags); |
e41b3a13 JJ |
996 | if (htab->plt_eh_frame == NULL |
997 | || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3)) | |
998 | return FALSE; | |
e41b3a13 | 999 | } |
b34976b6 | 1000 | return TRUE; |
c434dee6 AJ |
1001 | } |
1002 | ||
1003 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
1004 | ||
1005 | static void | |
351f65ca L |
1006 | elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
1007 | struct elf_link_hash_entry *dir, | |
1008 | struct elf_link_hash_entry *ind) | |
c434dee6 | 1009 | { |
351f65ca | 1010 | struct elf_x86_64_link_hash_entry *edir, *eind; |
c434dee6 | 1011 | |
351f65ca L |
1012 | edir = (struct elf_x86_64_link_hash_entry *) dir; |
1013 | eind = (struct elf_x86_64_link_hash_entry *) ind; | |
c434dee6 AJ |
1014 | |
1015 | if (eind->dyn_relocs != NULL) | |
1016 | { | |
1017 | if (edir->dyn_relocs != NULL) | |
1018 | { | |
e03a8ed8 L |
1019 | struct elf_dyn_relocs **pp; |
1020 | struct elf_dyn_relocs *p; | |
c434dee6 | 1021 | |
fcfa13d2 | 1022 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
1023 | list. Merge any entries against the same section. */ |
1024 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1025 | { | |
e03a8ed8 | 1026 | struct elf_dyn_relocs *q; |
c434dee6 AJ |
1027 | |
1028 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1029 | if (q->sec == p->sec) | |
1030 | { | |
1031 | q->pc_count += p->pc_count; | |
1032 | q->count += p->count; | |
1033 | *pp = p->next; | |
1034 | break; | |
1035 | } | |
1036 | if (q == NULL) | |
1037 | pp = &p->next; | |
1038 | } | |
1039 | *pp = edir->dyn_relocs; | |
1040 | } | |
1041 | ||
1042 | edir->dyn_relocs = eind->dyn_relocs; | |
1043 | eind->dyn_relocs = NULL; | |
1044 | } | |
1045 | ||
bffbf940 JJ |
1046 | if (ind->root.type == bfd_link_hash_indirect |
1047 | && dir->got.refcount <= 0) | |
1048 | { | |
1049 | edir->tls_type = eind->tls_type; | |
1050 | eind->tls_type = GOT_UNKNOWN; | |
1051 | } | |
1052 | ||
d40d037c AJ |
1053 | if (ELIMINATE_COPY_RELOCS |
1054 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1055 | && dir->dynamic_adjusted) |
1056 | { | |
1057 | /* If called to transfer flags for a weakdef during processing | |
1058 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1059 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
1060 | dir->ref_dynamic |= ind->ref_dynamic; | |
1061 | dir->ref_regular |= ind->ref_regular; | |
1062 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1063 | dir->needs_plt |= ind->needs_plt; | |
1064 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1065 | } | |
d40d037c | 1066 | else |
fcfa13d2 | 1067 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
8d88c4ca NC |
1068 | } |
1069 | ||
b34976b6 | 1070 | static bfd_boolean |
27482721 | 1071 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 1072 | { |
8d88c4ca NC |
1073 | /* Set the right machine number for an x86-64 elf64 file. */ |
1074 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 1075 | return TRUE; |
8d88c4ca NC |
1076 | } |
1077 | ||
8059fb19 RM |
1078 | static bfd_boolean |
1079 | elf32_x86_64_elf_object_p (bfd *abfd) | |
1080 | { | |
1081 | /* Set the right machine number for an x86-64 elf32 file. */ | |
1082 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
1083 | return TRUE; | |
1084 | } | |
1085 | ||
142411ca L |
1086 | /* Return TRUE if the TLS access code sequence support transition |
1087 | from R_TYPE. */ | |
1088 | ||
1089 | static bfd_boolean | |
351f65ca L |
1090 | elf_x86_64_check_tls_transition (bfd *abfd, |
1091 | struct bfd_link_info *info, | |
1092 | asection *sec, | |
1093 | bfd_byte *contents, | |
1094 | Elf_Internal_Shdr *symtab_hdr, | |
1095 | struct elf_link_hash_entry **sym_hashes, | |
1096 | unsigned int r_type, | |
1097 | const Elf_Internal_Rela *rel, | |
1098 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1099 | { |
142411ca L |
1100 | unsigned int val; |
1101 | unsigned long r_symndx; | |
1102 | struct elf_link_hash_entry *h; | |
1103 | bfd_vma offset; | |
351f65ca | 1104 | struct elf_x86_64_link_hash_table *htab; |
142411ca L |
1105 | |
1106 | /* Get the section contents. */ | |
1107 | if (contents == NULL) | |
1108 | { | |
1109 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1110 | contents = elf_section_data (sec)->this_hdr.contents; | |
1111 | else | |
1112 | { | |
1113 | /* FIXME: How to better handle error condition? */ | |
1114 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1115 | return FALSE; | |
bffbf940 | 1116 | |
142411ca L |
1117 | /* Cache the section contents for elf_link_input_bfd. */ |
1118 | elf_section_data (sec)->this_hdr.contents = contents; | |
1119 | } | |
1120 | } | |
1121 | ||
351f65ca | 1122 | htab = elf_x86_64_hash_table (info); |
142411ca | 1123 | offset = rel->r_offset; |
bffbf940 | 1124 | switch (r_type) |
142411ca L |
1125 | { |
1126 | case R_X86_64_TLSGD: | |
1127 | case R_X86_64_TLSLD: | |
1128 | if ((rel + 1) >= relend) | |
1129 | return FALSE; | |
1130 | ||
1131 | if (r_type == R_X86_64_TLSGD) | |
1132 | { | |
52bc799a | 1133 | /* Check transition from GD access model. For 64bit, only |
142411ca L |
1134 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
1135 | .word 0x6666; rex64; call __tls_get_addr | |
52bc799a L |
1136 | can transit to different access model. For 32bit, only |
1137 | leaq foo@tlsgd(%rip), %rdi | |
1138 | .word 0x6666; rex64; call __tls_get_addr | |
142411ca L |
1139 | can transit to different access model. */ |
1140 | ||
fa289a5f AM |
1141 | static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 }; |
1142 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; | |
1143 | ||
52bc799a | 1144 | if ((offset + 12) > sec->size |
fa289a5f | 1145 | || memcmp (contents + offset + 4, call, 4) != 0) |
142411ca | 1146 | return FALSE; |
52bc799a L |
1147 | |
1148 | if (ABI_64_P (abfd)) | |
1149 | { | |
52bc799a | 1150 | if (offset < 4 |
fa289a5f | 1151 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1152 | return FALSE; |
1153 | } | |
1154 | else | |
1155 | { | |
52bc799a | 1156 | if (offset < 3 |
fa289a5f | 1157 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1158 | return FALSE; |
1159 | } | |
142411ca L |
1160 | } |
1161 | else | |
1162 | { | |
1163 | /* Check transition from LD access model. Only | |
1164 | leaq foo@tlsld(%rip), %rdi; | |
1165 | call __tls_get_addr | |
1166 | can transit to different access model. */ | |
1167 | ||
fa289a5f | 1168 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1169 | |
1170 | if (offset < 3 || (offset + 9) > sec->size) | |
1171 | return FALSE; | |
1172 | ||
fa289a5f AM |
1173 | if (memcmp (contents + offset - 3, lea, 3) != 0 |
1174 | || 0xe8 != *(contents + offset + 4)) | |
142411ca L |
1175 | return FALSE; |
1176 | } | |
1177 | ||
351f65ca | 1178 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1179 | if (r_symndx < symtab_hdr->sh_info) |
1180 | return FALSE; | |
1181 | ||
1182 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
c4fb387b | 1183 | /* Use strncmp to check __tls_get_addr since __tls_get_addr |
eed180f8 | 1184 | may be versioned. */ |
142411ca L |
1185 | return (h != NULL |
1186 | && h->root.root.string != NULL | |
351f65ca L |
1187 | && (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32 |
1188 | || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32) | |
c4fb387b L |
1189 | && (strncmp (h->root.root.string, |
1190 | "__tls_get_addr", 14) == 0)); | |
142411ca L |
1191 | |
1192 | case R_X86_64_GOTTPOFF: | |
1193 | /* Check transition from IE access model: | |
4a4c5f25 L |
1194 | mov foo@gottpoff(%rip), %reg |
1195 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1196 | */ |
1197 | ||
4a4c5f25 L |
1198 | /* Check REX prefix first. */ |
1199 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1200 | { | |
1201 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1202 | if (val != 0x48 && val != 0x4c) | |
1203 | { | |
1204 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1205 | if (ABI_64_P (abfd)) | |
1206 | return FALSE; | |
1207 | } | |
1208 | } | |
1209 | else | |
1210 | { | |
1211 | /* X32 may not have any REX prefix. */ | |
1212 | if (ABI_64_P (abfd)) | |
1213 | return FALSE; | |
1214 | if (offset < 2 || (offset + 3) > sec->size) | |
1215 | return FALSE; | |
1216 | } | |
142411ca L |
1217 | |
1218 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1219 | if (val != 0x8b && val != 0x03) | |
1220 | return FALSE; | |
1221 | ||
1222 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1223 | return (val & 0xc7) == 5; | |
1224 | ||
1225 | case R_X86_64_GOTPC32_TLSDESC: | |
1226 | /* Check transition from GDesc access model: | |
1227 | leaq x@tlsdesc(%rip), %rax | |
1228 | ||
1229 | Make sure it's a leaq adding rip to a 32-bit offset | |
1230 | into any register, although it's probably almost always | |
1231 | going to be rax. */ | |
1232 | ||
1233 | if (offset < 3 || (offset + 4) > sec->size) | |
1234 | return FALSE; | |
1235 | ||
1236 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1237 | if ((val & 0xfb) != 0x48) | |
1238 | return FALSE; | |
1239 | ||
1240 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1241 | return FALSE; | |
1242 | ||
1243 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1244 | return (val & 0xc7) == 0x05; | |
1245 | ||
1246 | case R_X86_64_TLSDESC_CALL: | |
1247 | /* Check transition from GDesc access model: | |
1248 | call *x@tlsdesc(%rax) | |
1249 | */ | |
1250 | if (offset + 2 <= sec->size) | |
1251 | { | |
1252 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
fa289a5f AM |
1253 | static const unsigned char call[] = { 0xff, 0x10 }; |
1254 | return memcmp (contents + offset, call, 2) == 0; | |
142411ca L |
1255 | } |
1256 | ||
1257 | return FALSE; | |
1258 | ||
1259 | default: | |
1260 | abort (); | |
1261 | } | |
1262 | } | |
1263 | ||
1264 | /* Return TRUE if the TLS access transition is OK or no transition | |
1265 | will be performed. Update R_TYPE if there is a transition. */ | |
1266 | ||
1267 | static bfd_boolean | |
351f65ca L |
1268 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1269 | asection *sec, bfd_byte *contents, | |
1270 | Elf_Internal_Shdr *symtab_hdr, | |
1271 | struct elf_link_hash_entry **sym_hashes, | |
1272 | unsigned int *r_type, int tls_type, | |
1273 | const Elf_Internal_Rela *rel, | |
1274 | const Elf_Internal_Rela *relend, | |
1275 | struct elf_link_hash_entry *h, | |
1276 | unsigned long r_symndx) | |
142411ca L |
1277 | { |
1278 | unsigned int from_type = *r_type; | |
1279 | unsigned int to_type = from_type; | |
1280 | bfd_boolean check = TRUE; | |
1281 | ||
bb1cb422 L |
1282 | /* Skip TLS transition for functions. */ |
1283 | if (h != NULL | |
1284 | && (h->type == STT_FUNC | |
1285 | || h->type == STT_GNU_IFUNC)) | |
1286 | return TRUE; | |
1287 | ||
142411ca | 1288 | switch (from_type) |
bffbf940 JJ |
1289 | { |
1290 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1291 | case R_X86_64_GOTPC32_TLSDESC: |
1292 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1293 | case R_X86_64_GOTTPOFF: |
1d85728f | 1294 | if (info->executable) |
142411ca L |
1295 | { |
1296 | if (h == NULL) | |
1297 | to_type = R_X86_64_TPOFF32; | |
1298 | else | |
1299 | to_type = R_X86_64_GOTTPOFF; | |
1300 | } | |
1301 | ||
351f65ca | 1302 | /* When we are called from elf_x86_64_relocate_section, |
142411ca L |
1303 | CONTENTS isn't NULL and there may be additional transitions |
1304 | based on TLS_TYPE. */ | |
1305 | if (contents != NULL) | |
1306 | { | |
1307 | unsigned int new_to_type = to_type; | |
1308 | ||
1d85728f | 1309 | if (info->executable |
142411ca L |
1310 | && h != NULL |
1311 | && h->dynindx == -1 | |
1312 | && tls_type == GOT_TLS_IE) | |
1313 | new_to_type = R_X86_64_TPOFF32; | |
1314 | ||
1315 | if (to_type == R_X86_64_TLSGD | |
1316 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1317 | || to_type == R_X86_64_TLSDESC_CALL) | |
1318 | { | |
1319 | if (tls_type == GOT_TLS_IE) | |
1320 | new_to_type = R_X86_64_GOTTPOFF; | |
1321 | } | |
1322 | ||
1323 | /* We checked the transition before when we were called from | |
351f65ca | 1324 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1325 | transition which hasn't been checked before. */ |
1326 | check = new_to_type != to_type && from_type == to_type; | |
1327 | to_type = new_to_type; | |
1328 | } | |
1329 | ||
1330 | break; | |
1331 | ||
bffbf940 | 1332 | case R_X86_64_TLSLD: |
1d85728f | 1333 | if (info->executable) |
142411ca L |
1334 | to_type = R_X86_64_TPOFF32; |
1335 | break; | |
1336 | ||
1337 | default: | |
1338 | return TRUE; | |
bffbf940 JJ |
1339 | } |
1340 | ||
142411ca L |
1341 | /* Return TRUE if there is no transition. */ |
1342 | if (from_type == to_type) | |
1343 | return TRUE; | |
1344 | ||
1345 | /* Check if the transition can be performed. */ | |
1346 | if (check | |
351f65ca L |
1347 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1348 | symtab_hdr, sym_hashes, | |
1349 | from_type, rel, relend)) | |
142411ca | 1350 | { |
2f629d23 | 1351 | reloc_howto_type *from, *to; |
4c544807 | 1352 | const char *name; |
142411ca | 1353 | |
351f65ca L |
1354 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1355 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1356 | |
4c544807 L |
1357 | if (h) |
1358 | name = h->root.root.string; | |
1359 | else | |
1360 | { | |
351f65ca | 1361 | struct elf_x86_64_link_hash_table *htab; |
4dfe6ac6 | 1362 | |
351f65ca | 1363 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1364 | if (htab == NULL) |
1365 | name = "*unknown*"; | |
1366 | else | |
1367 | { | |
1368 | Elf_Internal_Sym *isym; | |
1369 | ||
1370 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1371 | abfd, r_symndx); | |
1372 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1373 | } | |
4c544807 L |
1374 | } |
1375 | ||
142411ca L |
1376 | (*_bfd_error_handler) |
1377 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1378 | "in section `%A' failed"), | |
4c544807 | 1379 | abfd, sec, from->name, to->name, name, |
142411ca L |
1380 | (unsigned long) rel->r_offset); |
1381 | bfd_set_error (bfd_error_bad_value); | |
1382 | return FALSE; | |
1383 | } | |
1384 | ||
1385 | *r_type = to_type; | |
1386 | return TRUE; | |
bffbf940 JJ |
1387 | } |
1388 | ||
70256ad8 | 1389 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1390 | calculate needed space in the global offset table, procedure |
1391 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1392 | |
b34976b6 | 1393 | static bfd_boolean |
351f65ca L |
1394 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1395 | asection *sec, | |
1396 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1397 | { |
351f65ca | 1398 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1399 | Elf_Internal_Shdr *symtab_hdr; |
1400 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1401 | const Elf_Internal_Rela *rel; |
1402 | const Elf_Internal_Rela *rel_end; | |
70256ad8 AJ |
1403 | asection *sreloc; |
1404 | ||
1049f94e | 1405 | if (info->relocatable) |
b34976b6 | 1406 | return TRUE; |
70256ad8 | 1407 | |
0ffa91dd NC |
1408 | BFD_ASSERT (is_x86_64_elf (abfd)); |
1409 | ||
351f65ca | 1410 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1411 | if (htab == NULL) |
1412 | return FALSE; | |
1413 | ||
0ffa91dd | 1414 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1415 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1416 | |
c434dee6 | 1417 | sreloc = NULL; |
cbe950e9 | 1418 | |
70256ad8 AJ |
1419 | rel_end = relocs + sec->reloc_count; |
1420 | for (rel = relocs; rel < rel_end; rel++) | |
1421 | { | |
bffbf940 | 1422 | unsigned int r_type; |
70256ad8 AJ |
1423 | unsigned long r_symndx; |
1424 | struct elf_link_hash_entry *h; | |
4c544807 L |
1425 | Elf_Internal_Sym *isym; |
1426 | const char *name; | |
70256ad8 | 1427 | |
351f65ca L |
1428 | r_symndx = htab->r_sym (rel->r_info); |
1429 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1430 | |
1431 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1432 | { | |
d003868e AM |
1433 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1434 | abfd, r_symndx); | |
b34976b6 | 1435 | return FALSE; |
c434dee6 AJ |
1436 | } |
1437 | ||
70256ad8 | 1438 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1439 | { |
1440 | /* A local symbol. */ | |
c2e61a4e L |
1441 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1442 | abfd, r_symndx); | |
1443 | if (isym == NULL) | |
1444 | return FALSE; | |
c25bc9fc L |
1445 | |
1446 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1447 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1448 | { |
351f65ca L |
1449 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, |
1450 | TRUE); | |
c25bc9fc | 1451 | if (h == NULL) |
c2e61a4e | 1452 | return FALSE; |
6bbec505 | 1453 | |
c25bc9fc L |
1454 | /* Fake a STT_GNU_IFUNC symbol. */ |
1455 | h->type = STT_GNU_IFUNC; | |
1456 | h->def_regular = 1; | |
1457 | h->ref_regular = 1; | |
1458 | h->forced_local = 1; | |
1459 | h->root.type = bfd_link_hash_defined; | |
1460 | } | |
1461 | else | |
1462 | h = NULL; | |
1463 | } | |
70256ad8 | 1464 | else |
71cb9464 | 1465 | { |
4c544807 | 1466 | isym = NULL; |
71cb9464 L |
1467 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1468 | while (h->root.type == bfd_link_hash_indirect | |
1469 | || h->root.type == bfd_link_hash_warning) | |
1470 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1471 | } |
cbe950e9 | 1472 | |
d1534d16 L |
1473 | /* Check invalid x32 relocations. */ |
1474 | if (!ABI_64_P (abfd)) | |
1475 | switch (r_type) | |
1476 | { | |
1477 | default: | |
1478 | break; | |
1479 | ||
d1534d16 L |
1480 | case R_X86_64_DTPOFF64: |
1481 | case R_X86_64_TPOFF64: | |
1482 | case R_X86_64_PC64: | |
1483 | case R_X86_64_GOTOFF64: | |
1484 | case R_X86_64_GOT64: | |
1485 | case R_X86_64_GOTPCREL64: | |
1486 | case R_X86_64_GOTPC64: | |
1487 | case R_X86_64_GOTPLT64: | |
1488 | case R_X86_64_PLTOFF64: | |
1489 | { | |
1490 | if (h) | |
1491 | name = h->root.root.string; | |
1492 | else | |
1493 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1494 | NULL); | |
1495 | (*_bfd_error_handler) | |
1496 | (_("%B: relocation %s against symbol `%s' isn't " | |
1497 | "supported in x32 mode"), abfd, | |
1498 | x86_64_elf_howto_table[r_type].name, name); | |
1499 | bfd_set_error (bfd_error_bad_value); | |
1500 | return FALSE; | |
1501 | } | |
1502 | break; | |
1503 | } | |
1504 | ||
c25bc9fc L |
1505 | if (h != NULL) |
1506 | { | |
cbe950e9 L |
1507 | /* Create the ifunc sections for static executables. If we |
1508 | never see an indirect function symbol nor we are building | |
1509 | a static executable, those sections will be empty and | |
1510 | won't appear in output. */ | |
1511 | switch (r_type) | |
1512 | { | |
1513 | default: | |
1514 | break; | |
1515 | ||
1516 | case R_X86_64_32S: | |
1517 | case R_X86_64_32: | |
1518 | case R_X86_64_64: | |
1519 | case R_X86_64_PC32: | |
1520 | case R_X86_64_PC64: | |
1521 | case R_X86_64_PLT32: | |
1522 | case R_X86_64_GOTPCREL: | |
1523 | case R_X86_64_GOTPCREL64: | |
9d4057ee AM |
1524 | if (htab->elf.dynobj == NULL) |
1525 | htab->elf.dynobj = abfd; | |
1526 | if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) | |
c2e61a4e | 1527 | return FALSE; |
cbe950e9 L |
1528 | break; |
1529 | } | |
1530 | ||
ad1e85de L |
1531 | /* It is referenced by a non-shared object. */ |
1532 | h->ref_regular = 1; | |
71cb9464 | 1533 | } |
70256ad8 | 1534 | |
351f65ca L |
1535 | if (! elf_x86_64_tls_transition (info, abfd, sec, NULL, |
1536 | symtab_hdr, sym_hashes, | |
1537 | &r_type, GOT_UNKNOWN, | |
1538 | rel, rel_end, h, r_symndx)) | |
c2e61a4e | 1539 | return FALSE; |
142411ca | 1540 | |
bffbf940 | 1541 | switch (r_type) |
70256ad8 | 1542 | { |
bffbf940 JJ |
1543 | case R_X86_64_TLSLD: |
1544 | htab->tls_ld_got.refcount += 1; | |
1545 | goto create_got; | |
1546 | ||
1547 | case R_X86_64_TPOFF32: | |
351f65ca | 1548 | if (!info->executable && ABI_64_P (abfd)) |
70256ad8 | 1549 | { |
09a24cbf | 1550 | if (h) |
4c544807 L |
1551 | name = h->root.root.string; |
1552 | else | |
1553 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1554 | NULL); | |
bffbf940 | 1555 | (*_bfd_error_handler) |
d003868e AM |
1556 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
1557 | abfd, | |
4c544807 | 1558 | x86_64_elf_howto_table[r_type].name, name); |
bffbf940 | 1559 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1560 | return FALSE; |
70256ad8 | 1561 | } |
bffbf940 | 1562 | break; |
c434dee6 | 1563 | |
bffbf940 | 1564 | case R_X86_64_GOTTPOFF: |
1d85728f | 1565 | if (!info->executable) |
bffbf940 JJ |
1566 | info->flags |= DF_STATIC_TLS; |
1567 | /* Fall through */ | |
70256ad8 | 1568 | |
bffbf940 JJ |
1569 | case R_X86_64_GOT32: |
1570 | case R_X86_64_GOTPCREL: | |
1571 | case R_X86_64_TLSGD: | |
7b81dfbb AJ |
1572 | case R_X86_64_GOT64: |
1573 | case R_X86_64_GOTPCREL64: | |
1574 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
1575 | case R_X86_64_GOTPC32_TLSDESC: |
1576 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
1577 | /* This symbol requires a global offset table entry. */ |
1578 | { | |
1579 | int tls_type, old_tls_type; | |
1580 | ||
1581 | switch (r_type) | |
1582 | { | |
1583 | default: tls_type = GOT_NORMAL; break; | |
1584 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
1585 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
1586 | case R_X86_64_GOTPC32_TLSDESC: |
1587 | case R_X86_64_TLSDESC_CALL: | |
1588 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
1589 | } |
1590 | ||
1591 | if (h != NULL) | |
1592 | { | |
7b81dfbb AJ |
1593 | if (r_type == R_X86_64_GOTPLT64) |
1594 | { | |
1595 | /* This relocation indicates that we also need | |
1596 | a PLT entry, as this is a function. We don't need | |
1597 | a PLT entry for local symbols. */ | |
1598 | h->needs_plt = 1; | |
1599 | h->plt.refcount += 1; | |
1600 | } | |
bffbf940 | 1601 | h->got.refcount += 1; |
351f65ca | 1602 | old_tls_type = elf_x86_64_hash_entry (h)->tls_type; |
bffbf940 JJ |
1603 | } |
1604 | else | |
1605 | { | |
1606 | bfd_signed_vma *local_got_refcounts; | |
1607 | ||
1608 | /* This is a global offset table entry for a local symbol. */ | |
1609 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1610 | if (local_got_refcounts == NULL) | |
1611 | { | |
1612 | bfd_size_type size; | |
1613 | ||
1614 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1615 | size *= sizeof (bfd_signed_vma) |
1616 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
1617 | local_got_refcounts = ((bfd_signed_vma *) |
1618 | bfd_zalloc (abfd, size)); | |
1619 | if (local_got_refcounts == NULL) | |
c2e61a4e | 1620 | return FALSE; |
bffbf940 | 1621 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
351f65ca | 1622 | elf_x86_64_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 1623 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
351f65ca | 1624 | elf_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 1625 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
1626 | } |
1627 | local_got_refcounts[r_symndx] += 1; | |
1628 | old_tls_type | |
351f65ca | 1629 | = elf_x86_64_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
1630 | } |
1631 | ||
1632 | /* If a TLS symbol is accessed using IE at least once, | |
1633 | there is no point to use dynamic model for it. */ | |
1634 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
1635 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
1636 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 1637 | { |
67a4f2b7 | 1638 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 1639 | tls_type = old_tls_type; |
67a4f2b7 AO |
1640 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1641 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1642 | tls_type |= old_tls_type; | |
bffbf940 JJ |
1643 | else |
1644 | { | |
09a24cbf | 1645 | if (h) |
4c544807 L |
1646 | name = h->root.root.string; |
1647 | else | |
1648 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
1649 | isym, NULL); | |
bffbf940 | 1650 | (*_bfd_error_handler) |
1f7a4e42 | 1651 | (_("%B: '%s' accessed both as normal and thread local symbol"), |
4c544807 | 1652 | abfd, name); |
68c4a57e | 1653 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1654 | return FALSE; |
bffbf940 JJ |
1655 | } |
1656 | } | |
1657 | ||
1658 | if (old_tls_type != tls_type) | |
1659 | { | |
1660 | if (h != NULL) | |
351f65ca | 1661 | elf_x86_64_hash_entry (h)->tls_type = tls_type; |
bffbf940 | 1662 | else |
351f65ca | 1663 | elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
1664 | } |
1665 | } | |
c434dee6 AJ |
1666 | /* Fall through */ |
1667 | ||
d6ab8113 JB |
1668 | case R_X86_64_GOTOFF64: |
1669 | case R_X86_64_GOTPC32: | |
7b81dfbb | 1670 | case R_X86_64_GOTPC64: |
bffbf940 | 1671 | create_got: |
6de2ae4a | 1672 | if (htab->elf.sgot == NULL) |
c434dee6 AJ |
1673 | { |
1674 | if (htab->elf.dynobj == NULL) | |
1675 | htab->elf.dynobj = abfd; | |
6de2ae4a L |
1676 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, |
1677 | info)) | |
c2e61a4e | 1678 | return FALSE; |
c434dee6 | 1679 | } |
70256ad8 AJ |
1680 | break; |
1681 | ||
1682 | case R_X86_64_PLT32: | |
1683 | /* This symbol requires a procedure linkage table entry. We | |
407443a3 AJ |
1684 | actually build the entry in adjust_dynamic_symbol, |
1685 | because this might be a case of linking PIC code which is | |
1686 | never referenced by a dynamic object, in which case we | |
1687 | don't need to generate a procedure linkage table entry | |
1688 | after all. */ | |
70256ad8 AJ |
1689 | |
1690 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 1691 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
1692 | if (h == NULL) |
1693 | continue; | |
1694 | ||
f5385ebf | 1695 | h->needs_plt = 1; |
51b64d56 | 1696 | h->plt.refcount += 1; |
70256ad8 AJ |
1697 | break; |
1698 | ||
7b81dfbb AJ |
1699 | case R_X86_64_PLTOFF64: |
1700 | /* This tries to form the 'address' of a function relative | |
1701 | to GOT. For global symbols we need a PLT entry. */ | |
1702 | if (h != NULL) | |
1703 | { | |
1704 | h->needs_plt = 1; | |
1705 | h->plt.refcount += 1; | |
1706 | } | |
1707 | goto create_got; | |
1708 | ||
248775ba L |
1709 | case R_X86_64_32: |
1710 | if (!ABI_64_P (abfd)) | |
1711 | goto pointer; | |
cc78d0af AJ |
1712 | case R_X86_64_8: |
1713 | case R_X86_64_16: | |
70256ad8 | 1714 | case R_X86_64_32S: |
1b71fb54 AJ |
1715 | /* Let's help debug shared library creation. These relocs |
1716 | cannot be used in shared libs. Don't error out for | |
1717 | sections we don't care about, such as debug sections or | |
1718 | non-constant sections. */ | |
1719 | if (info->shared | |
1720 | && (sec->flags & SEC_ALLOC) != 0 | |
1721 | && (sec->flags & SEC_READONLY) != 0) | |
1722 | { | |
09a24cbf | 1723 | if (h) |
4c544807 L |
1724 | name = h->root.root.string; |
1725 | else | |
1726 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1b71fb54 | 1727 | (*_bfd_error_handler) |
d003868e | 1728 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
4c544807 | 1729 | abfd, x86_64_elf_howto_table[r_type].name, name); |
1b71fb54 | 1730 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1731 | return FALSE; |
1b71fb54 AJ |
1732 | } |
1733 | /* Fall through. */ | |
1734 | ||
c434dee6 AJ |
1735 | case R_X86_64_PC8: |
1736 | case R_X86_64_PC16: | |
70256ad8 | 1737 | case R_X86_64_PC32: |
d6ab8113 | 1738 | case R_X86_64_PC64: |
1b71fb54 | 1739 | case R_X86_64_64: |
1788fc08 L |
1740 | case R_X86_64_SIZE32: |
1741 | case R_X86_64_SIZE64: | |
248775ba | 1742 | pointer: |
710ab287 | 1743 | if (h != NULL && info->executable) |
c434dee6 AJ |
1744 | { |
1745 | /* If this reloc is in a read-only section, we might | |
1746 | need a copy reloc. We can't check reliably at this | |
1747 | stage whether the section is read-only, as input | |
1748 | sections have not yet been mapped to output sections. | |
1749 | Tentatively set the flag for now, and correct in | |
1750 | adjust_dynamic_symbol. */ | |
f5385ebf | 1751 | h->non_got_ref = 1; |
c434dee6 AJ |
1752 | |
1753 | /* We may need a .plt entry if the function this reloc | |
1754 | refers to is in a shared lib. */ | |
1755 | h->plt.refcount += 1; | |
d6ab8113 | 1756 | if (r_type != R_X86_64_PC32 && r_type != R_X86_64_PC64) |
f5385ebf | 1757 | h->pointer_equality_needed = 1; |
c434dee6 | 1758 | } |
70256ad8 AJ |
1759 | |
1760 | /* If we are creating a shared library, and this is a reloc | |
1761 | against a global symbol, or a non PC relative reloc | |
1762 | against a local symbol, then we need to copy the reloc | |
1763 | into the shared library. However, if we are linking with | |
1764 | -Bsymbolic, we do not need to copy a reloc against a | |
1765 | global symbol which is defined in an object we are | |
407443a3 | 1766 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
1767 | this point we have not seen all the input files, so it is |
1768 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
1769 | later (it is never cleared). In case of a weak definition, |
1770 | DEF_REGULAR may be cleared later by a strong definition in | |
1771 | a shared library. We account for that possibility below by | |
1772 | storing information in the relocs_copied field of the hash | |
1773 | table entry. A similar situation occurs when creating | |
1774 | shared libraries and symbol visibility changes render the | |
1775 | symbol local. | |
1776 | ||
1777 | If on the other hand, we are creating an executable, we | |
1778 | may need to keep relocations for symbols satisfied by a | |
1779 | dynamic library if we manage to avoid copy relocs for the | |
0f88be7a | 1780 | symbol. */ |
c434dee6 AJ |
1781 | if ((info->shared |
1782 | && (sec->flags & SEC_ALLOC) != 0 | |
d8045f23 | 1783 | && (! IS_X86_64_PCREL_TYPE (r_type) |
c434dee6 | 1784 | || (h != NULL |
55255dae | 1785 | && (! SYMBOLIC_BIND (info, h) |
c434dee6 | 1786 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1787 | || !h->def_regular)))) |
d40d037c AJ |
1788 | || (ELIMINATE_COPY_RELOCS |
1789 | && !info->shared | |
c434dee6 AJ |
1790 | && (sec->flags & SEC_ALLOC) != 0 |
1791 | && h != NULL | |
1792 | && (h->root.type == bfd_link_hash_defweak | |
0f88be7a | 1793 | || !h->def_regular))) |
70256ad8 | 1794 | { |
e03a8ed8 L |
1795 | struct elf_dyn_relocs *p; |
1796 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
1797 | |
1798 | /* We must copy these reloc types into the output file. | |
1799 | Create a reloc section in dynobj and make room for | |
1800 | this reloc. */ | |
70256ad8 AJ |
1801 | if (sreloc == NULL) |
1802 | { | |
c434dee6 AJ |
1803 | if (htab->elf.dynobj == NULL) |
1804 | htab->elf.dynobj = abfd; | |
1805 | ||
83bac4b0 | 1806 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
1807 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
1808 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 1809 | |
70256ad8 | 1810 | if (sreloc == NULL) |
c2e61a4e | 1811 | return FALSE; |
70256ad8 AJ |
1812 | } |
1813 | ||
c434dee6 AJ |
1814 | /* If this is a global symbol, we count the number of |
1815 | relocations we need for this symbol. */ | |
1816 | if (h != NULL) | |
70256ad8 | 1817 | { |
351f65ca | 1818 | head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs; |
c434dee6 AJ |
1819 | } |
1820 | else | |
1821 | { | |
1822 | /* Track dynamic relocs needed for local syms too. | |
1823 | We really need local syms available to do this | |
1824 | easily. Oh well. */ | |
c434dee6 | 1825 | asection *s; |
87d72d41 | 1826 | void **vpp; |
87d72d41 AM |
1827 | |
1828 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1829 | abfd, r_symndx); | |
1830 | if (isym == NULL) | |
1831 | return FALSE; | |
1832 | ||
1833 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 1834 | if (s == NULL) |
87d72d41 | 1835 | s = sec; |
70256ad8 | 1836 | |
e81d3500 DD |
1837 | /* Beware of type punned pointers vs strict aliasing |
1838 | rules. */ | |
1839 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 1840 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 1841 | } |
70256ad8 | 1842 | |
c434dee6 AJ |
1843 | p = *head; |
1844 | if (p == NULL || p->sec != sec) | |
1845 | { | |
1846 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 1847 | |
e03a8ed8 | 1848 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 1849 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 1850 | if (p == NULL) |
c2e61a4e | 1851 | return FALSE; |
c434dee6 AJ |
1852 | p->next = *head; |
1853 | *head = p; | |
1854 | p->sec = sec; | |
1855 | p->count = 0; | |
1856 | p->pc_count = 0; | |
70256ad8 | 1857 | } |
c434dee6 AJ |
1858 | |
1859 | p->count += 1; | |
d8045f23 | 1860 | if (IS_X86_64_PCREL_TYPE (r_type)) |
c434dee6 | 1861 | p->pc_count += 1; |
70256ad8 AJ |
1862 | } |
1863 | break; | |
fe4770f4 AJ |
1864 | |
1865 | /* This relocation describes the C++ object vtable hierarchy. | |
1866 | Reconstruct it for later use during GC. */ | |
1867 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 1868 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c2e61a4e | 1869 | return FALSE; |
fe4770f4 AJ |
1870 | break; |
1871 | ||
1872 | /* This relocation describes which C++ vtable entries are actually | |
1873 | used. Record for later use during GC. */ | |
1874 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
1875 | BFD_ASSERT (h != NULL); |
1876 | if (h != NULL | |
1877 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
c2e61a4e | 1878 | return FALSE; |
fe4770f4 | 1879 | break; |
c434dee6 AJ |
1880 | |
1881 | default: | |
1882 | break; | |
70256ad8 AJ |
1883 | } |
1884 | } | |
1885 | ||
b34976b6 | 1886 | return TRUE; |
70256ad8 AJ |
1887 | } |
1888 | ||
1889 | /* Return the section that should be marked against GC for a given | |
407443a3 | 1890 | relocation. */ |
70256ad8 AJ |
1891 | |
1892 | static asection * | |
351f65ca L |
1893 | elf_x86_64_gc_mark_hook (asection *sec, |
1894 | struct bfd_link_info *info, | |
1895 | Elf_Internal_Rela *rel, | |
1896 | struct elf_link_hash_entry *h, | |
1897 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
1898 | { |
1899 | if (h != NULL) | |
351f65ca | 1900 | switch (ELF32_R_TYPE (rel->r_info)) |
07adf181 AM |
1901 | { |
1902 | case R_X86_64_GNU_VTINHERIT: | |
1903 | case R_X86_64_GNU_VTENTRY: | |
1904 | return NULL; | |
1905 | } | |
1906 | ||
1907 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
1908 | } |
1909 | ||
407443a3 | 1910 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 | 1911 | |
b34976b6 | 1912 | static bfd_boolean |
351f65ca L |
1913 | elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, |
1914 | asection *sec, | |
1915 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1916 | { |
351f65ca | 1917 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1918 | Elf_Internal_Shdr *symtab_hdr; |
1919 | struct elf_link_hash_entry **sym_hashes; | |
1920 | bfd_signed_vma *local_got_refcounts; | |
1921 | const Elf_Internal_Rela *rel, *relend; | |
c434dee6 | 1922 | |
7dda2462 TG |
1923 | if (info->relocatable) |
1924 | return TRUE; | |
1925 | ||
351f65ca | 1926 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1927 | if (htab == NULL) |
1928 | return FALSE; | |
1929 | ||
c434dee6 | 1930 | elf_section_data (sec)->local_dynrel = NULL; |
70256ad8 | 1931 | |
0ffa91dd | 1932 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 AJ |
1933 | sym_hashes = elf_sym_hashes (abfd); |
1934 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1935 | ||
351f65ca | 1936 | htab = elf_x86_64_hash_table (info); |
70256ad8 AJ |
1937 | relend = relocs + sec->reloc_count; |
1938 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
1939 | { |
1940 | unsigned long r_symndx; | |
1941 | unsigned int r_type; | |
1942 | struct elf_link_hash_entry *h = NULL; | |
70256ad8 | 1943 | |
351f65ca | 1944 | r_symndx = htab->r_sym (rel->r_info); |
26e41594 AM |
1945 | if (r_symndx >= symtab_hdr->sh_info) |
1946 | { | |
26e41594 | 1947 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1948 | while (h->root.type == bfd_link_hash_indirect |
1949 | || h->root.type == bfd_link_hash_warning) | |
1950 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1951 | } |
bb1cb422 L |
1952 | else |
1953 | { | |
1954 | /* A local symbol. */ | |
1955 | Elf_Internal_Sym *isym; | |
1956 | ||
1957 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1958 | abfd, r_symndx); | |
1959 | ||
1960 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
1961 | if (isym != NULL | |
82e96e07 | 1962 | && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
bb1cb422 | 1963 | { |
351f65ca | 1964 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE); |
bb1cb422 L |
1965 | if (h == NULL) |
1966 | abort (); | |
1967 | } | |
1968 | } | |
c434dee6 | 1969 | |
3db2e7dd L |
1970 | if (h) |
1971 | { | |
1972 | struct elf_x86_64_link_hash_entry *eh; | |
1973 | struct elf_dyn_relocs **pp; | |
1974 | struct elf_dyn_relocs *p; | |
1975 | ||
1976 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
1977 | ||
1978 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
1979 | if (p->sec == sec) | |
1980 | { | |
1981 | /* Everything must go for SEC. */ | |
1982 | *pp = p->next; | |
1983 | break; | |
1984 | } | |
1985 | } | |
1986 | ||
351f65ca L |
1987 | r_type = ELF32_R_TYPE (rel->r_info); |
1988 | if (! elf_x86_64_tls_transition (info, abfd, sec, NULL, | |
1989 | symtab_hdr, sym_hashes, | |
1990 | &r_type, GOT_UNKNOWN, | |
1991 | rel, relend, h, r_symndx)) | |
142411ca L |
1992 | return FALSE; |
1993 | ||
26e41594 AM |
1994 | switch (r_type) |
1995 | { | |
1996 | case R_X86_64_TLSLD: | |
4dfe6ac6 NC |
1997 | if (htab->tls_ld_got.refcount > 0) |
1998 | htab->tls_ld_got.refcount -= 1; | |
26e41594 | 1999 | break; |
c434dee6 | 2000 | |
26e41594 | 2001 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
2002 | case R_X86_64_GOTPC32_TLSDESC: |
2003 | case R_X86_64_TLSDESC_CALL: | |
26e41594 AM |
2004 | case R_X86_64_GOTTPOFF: |
2005 | case R_X86_64_GOT32: | |
2006 | case R_X86_64_GOTPCREL: | |
7b81dfbb AJ |
2007 | case R_X86_64_GOT64: |
2008 | case R_X86_64_GOTPCREL64: | |
2009 | case R_X86_64_GOTPLT64: | |
26e41594 AM |
2010 | if (h != NULL) |
2011 | { | |
7b81dfbb | 2012 | if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0) |
eed180f8 | 2013 | h->plt.refcount -= 1; |
26e41594 AM |
2014 | if (h->got.refcount > 0) |
2015 | h->got.refcount -= 1; | |
bb1cb422 L |
2016 | if (h->type == STT_GNU_IFUNC) |
2017 | { | |
2018 | if (h->plt.refcount > 0) | |
2019 | h->plt.refcount -= 1; | |
2020 | } | |
26e41594 AM |
2021 | } |
2022 | else if (local_got_refcounts != NULL) | |
2023 | { | |
2024 | if (local_got_refcounts[r_symndx] > 0) | |
2025 | local_got_refcounts[r_symndx] -= 1; | |
2026 | } | |
2027 | break; | |
c434dee6 | 2028 | |
26e41594 AM |
2029 | case R_X86_64_8: |
2030 | case R_X86_64_16: | |
2031 | case R_X86_64_32: | |
2032 | case R_X86_64_64: | |
2033 | case R_X86_64_32S: | |
2034 | case R_X86_64_PC8: | |
2035 | case R_X86_64_PC16: | |
2036 | case R_X86_64_PC32: | |
d6ab8113 | 2037 | case R_X86_64_PC64: |
1788fc08 L |
2038 | case R_X86_64_SIZE32: |
2039 | case R_X86_64_SIZE64: | |
3db2e7dd L |
2040 | if (info->shared |
2041 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
26e41594 AM |
2042 | break; |
2043 | /* Fall thru */ | |
c434dee6 | 2044 | |
26e41594 | 2045 | case R_X86_64_PLT32: |
7b81dfbb | 2046 | case R_X86_64_PLTOFF64: |
26e41594 AM |
2047 | if (h != NULL) |
2048 | { | |
2049 | if (h->plt.refcount > 0) | |
2050 | h->plt.refcount -= 1; | |
2051 | } | |
2052 | break; | |
70256ad8 | 2053 | |
26e41594 AM |
2054 | default: |
2055 | break; | |
2056 | } | |
2057 | } | |
70256ad8 | 2058 | |
b34976b6 | 2059 | return TRUE; |
70256ad8 AJ |
2060 | } |
2061 | ||
2062 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
2063 | regular object. The current definition is in some section of the | |
2064 | dynamic object, but we're not including those sections. We have to | |
2065 | change the definition to something the rest of the link can | |
407443a3 | 2066 | understand. */ |
70256ad8 | 2067 | |
b34976b6 | 2068 | static bfd_boolean |
351f65ca L |
2069 | elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
2070 | struct elf_link_hash_entry *h) | |
70256ad8 | 2071 | { |
351f65ca | 2072 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 | 2073 | asection *s; |
5ca5bb35 L |
2074 | struct elf_x86_64_link_hash_entry *eh; |
2075 | struct elf_dyn_relocs *p; | |
70256ad8 | 2076 | |
cbe950e9 L |
2077 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2078 | if (h->type == STT_GNU_IFUNC) | |
2079 | { | |
73bcf233 L |
2080 | /* All local STT_GNU_IFUNC references must be treate as local |
2081 | calls via local PLT. */ | |
5ca5bb35 L |
2082 | if (h->ref_regular |
2083 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2084 | { | |
73bcf233 | 2085 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2086 | struct elf_dyn_relocs **pp; |
2087 | ||
2088 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2089 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2090 | { | |
2091 | pc_count += p->pc_count; | |
2092 | p->count -= p->pc_count; | |
2093 | p->pc_count = 0; | |
73bcf233 | 2094 | count += p->count; |
5ca5bb35 L |
2095 | if (p->count == 0) |
2096 | *pp = p->next; | |
2097 | else | |
2098 | pp = &p->next; | |
2099 | } | |
2100 | ||
73bcf233 | 2101 | if (pc_count || count) |
5ca5bb35 L |
2102 | { |
2103 | h->needs_plt = 1; | |
5ca5bb35 | 2104 | h->non_got_ref = 1; |
a5479e5f L |
2105 | if (h->plt.refcount <= 0) |
2106 | h->plt.refcount = 1; | |
2107 | else | |
2108 | h->plt.refcount += 1; | |
5ca5bb35 L |
2109 | } |
2110 | } | |
2111 | ||
cbe950e9 L |
2112 | if (h->plt.refcount <= 0) |
2113 | { | |
2114 | h->plt.offset = (bfd_vma) -1; | |
2115 | h->needs_plt = 0; | |
2116 | } | |
2117 | return TRUE; | |
2118 | } | |
2119 | ||
70256ad8 AJ |
2120 | /* If this is a function, put it in the procedure linkage table. We |
2121 | will fill in the contents of the procedure linkage table later, | |
2122 | when we know the address of the .got section. */ | |
2123 | if (h->type == STT_FUNC | |
f5385ebf | 2124 | || h->needs_plt) |
70256ad8 | 2125 | { |
c434dee6 | 2126 | if (h->plt.refcount <= 0 |
27482721 AJ |
2127 | || SYMBOL_CALLS_LOCAL (info, h) |
2128 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2129 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 2130 | { |
70256ad8 AJ |
2131 | /* This case can occur if we saw a PLT32 reloc in an input |
2132 | file, but the symbol was never referred to by a dynamic | |
2133 | object, or if all references were garbage collected. In | |
2134 | such a case, we don't actually need to build a procedure | |
2135 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 2136 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2137 | h->needs_plt = 0; |
70256ad8 AJ |
2138 | } |
2139 | ||
b34976b6 | 2140 | return TRUE; |
70256ad8 | 2141 | } |
bbd7ec4a | 2142 | else |
c434dee6 AJ |
2143 | /* It's possible that we incorrectly decided a .plt reloc was |
2144 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
2145 | check_relocs. We can't decide accurately between function and | |
2146 | non-function syms in check-relocs; Objects loaded later in | |
2147 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2148 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
2149 | |
2150 | /* If this is a weak symbol, and there is a real definition, the | |
2151 | processor independent code will have arranged for us to see the | |
407443a3 | 2152 | real definition first, and we can just use the same value. */ |
f6e332e6 | 2153 | if (h->u.weakdef != NULL) |
70256ad8 | 2154 | { |
f6e332e6 AM |
2155 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2156 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2157 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2158 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 2159 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 2160 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 2161 | return TRUE; |
70256ad8 AJ |
2162 | } |
2163 | ||
2164 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 2165 | is not a function. */ |
70256ad8 AJ |
2166 | |
2167 | /* If we are creating a shared library, we must presume that the | |
2168 | only references to the symbol are via the global offset table. | |
2169 | For such cases we need not do anything here; the relocations will | |
407443a3 | 2170 | be handled correctly by relocate_section. */ |
70256ad8 | 2171 | if (info->shared) |
b34976b6 | 2172 | return TRUE; |
70256ad8 AJ |
2173 | |
2174 | /* If there are no references to this symbol that do not use the | |
2175 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 2176 | if (!h->non_got_ref) |
b34976b6 | 2177 | return TRUE; |
70256ad8 | 2178 | |
c434dee6 AJ |
2179 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2180 | if (info->nocopyreloc) | |
2181 | { | |
f5385ebf | 2182 | h->non_got_ref = 0; |
b34976b6 | 2183 | return TRUE; |
c434dee6 AJ |
2184 | } |
2185 | ||
d40d037c | 2186 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 2187 | { |
351f65ca | 2188 | eh = (struct elf_x86_64_link_hash_entry *) h; |
d40d037c AJ |
2189 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2190 | { | |
2191 | s = p->sec->output_section; | |
2192 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2193 | break; | |
2194 | } | |
2195 | ||
2196 | /* If we didn't find any dynamic relocs in read-only sections, then | |
2197 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
2198 | if (p == NULL) | |
2199 | { | |
f5385ebf | 2200 | h->non_got_ref = 0; |
d40d037c AJ |
2201 | return TRUE; |
2202 | } | |
c434dee6 AJ |
2203 | } |
2204 | ||
70256ad8 | 2205 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 2206 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
2207 | an entry for this symbol in the .dynsym section. The dynamic |
2208 | object will contain position independent code, so all references | |
2209 | from the dynamic object to this symbol will go through the global | |
2210 | offset table. The dynamic linker will use the .dynsym entry to | |
2211 | determine the address it must put in the global offset table, so | |
2212 | both the dynamic object and the regular object will refer to the | |
2213 | same memory location for the variable. */ | |
2214 | ||
351f65ca | 2215 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2216 | if (htab == NULL) |
2217 | return FALSE; | |
70256ad8 AJ |
2218 | |
2219 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
2220 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 2221 | runtime process image. */ |
1d7e9d18 | 2222 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
70256ad8 | 2223 | { |
351f65ca L |
2224 | const struct elf_backend_data *bed; |
2225 | bed = get_elf_backend_data (info->output_bfd); | |
2226 | htab->srelbss->size += bed->s->sizeof_rela; | |
f5385ebf | 2227 | h->needs_copy = 1; |
70256ad8 AJ |
2228 | } |
2229 | ||
c434dee6 | 2230 | s = htab->sdynbss; |
70256ad8 | 2231 | |
027297b7 | 2232 | return _bfd_elf_adjust_dynamic_copy (h, s); |
70256ad8 AJ |
2233 | } |
2234 | ||
c434dee6 AJ |
2235 | /* Allocate space in .plt, .got and associated reloc sections for |
2236 | dynamic relocs. */ | |
2237 | ||
b34976b6 | 2238 | static bfd_boolean |
351f65ca | 2239 | elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
2240 | { |
2241 | struct bfd_link_info *info; | |
351f65ca L |
2242 | struct elf_x86_64_link_hash_table *htab; |
2243 | struct elf_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 2244 | struct elf_dyn_relocs *p; |
351f65ca | 2245 | const struct elf_backend_data *bed; |
eed180f8 | 2246 | unsigned int plt_entry_size; |
c434dee6 | 2247 | |
e92d460e | 2248 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2249 | return TRUE; |
c434dee6 | 2250 | |
351f65ca | 2251 | eh = (struct elf_x86_64_link_hash_entry *) h; |
e92d460e | 2252 | |
c434dee6 | 2253 | info = (struct bfd_link_info *) inf; |
351f65ca | 2254 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2255 | if (htab == NULL) |
2256 | return FALSE; | |
351f65ca | 2257 | bed = get_elf_backend_data (info->output_bfd); |
eed180f8 | 2258 | plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
c434dee6 | 2259 | |
cbe950e9 L |
2260 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2261 | here if it is defined and referenced in a non-shared object. */ | |
2262 | if (h->type == STT_GNU_IFUNC | |
2263 | && h->def_regular) | |
e03a8ed8 L |
2264 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, |
2265 | &eh->dyn_relocs, | |
eed180f8 | 2266 | plt_entry_size, |
e03a8ed8 | 2267 | GOT_ENTRY_SIZE); |
cbe950e9 L |
2268 | else if (htab->elf.dynamic_sections_created |
2269 | && h->plt.refcount > 0) | |
c434dee6 AJ |
2270 | { |
2271 | /* Make sure this symbol is output as a dynamic symbol. | |
2272 | Undefined weak syms won't yet be marked as dynamic. */ | |
2273 | if (h->dynindx == -1 | |
f5385ebf | 2274 | && !h->forced_local) |
c434dee6 | 2275 | { |
c152c796 | 2276 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2277 | return FALSE; |
c434dee6 AJ |
2278 | } |
2279 | ||
27482721 AJ |
2280 | if (info->shared |
2281 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
c434dee6 | 2282 | { |
6de2ae4a | 2283 | asection *s = htab->elf.splt; |
c434dee6 AJ |
2284 | |
2285 | /* If this is the first .plt entry, make room for the special | |
2286 | first entry. */ | |
eea6121a | 2287 | if (s->size == 0) |
eed180f8 | 2288 | s->size += plt_entry_size; |
c434dee6 | 2289 | |
eea6121a | 2290 | h->plt.offset = s->size; |
c434dee6 AJ |
2291 | |
2292 | /* If this symbol is not defined in a regular file, and we are | |
2293 | not generating a shared library, then set the symbol to this | |
2294 | location in the .plt. This is required to make function | |
2295 | pointers compare as equal between the normal executable and | |
2296 | the shared library. */ | |
2297 | if (! info->shared | |
f5385ebf | 2298 | && !h->def_regular) |
c434dee6 AJ |
2299 | { |
2300 | h->root.u.def.section = s; | |
2301 | h->root.u.def.value = h->plt.offset; | |
2302 | } | |
2303 | ||
2304 | /* Make room for this entry. */ | |
eed180f8 | 2305 | s->size += plt_entry_size; |
c434dee6 AJ |
2306 | |
2307 | /* We also need to make an entry in the .got.plt section, which | |
2308 | will be placed in the .got section by the linker script. */ | |
6de2ae4a | 2309 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; |
c434dee6 AJ |
2310 | |
2311 | /* We also need to make an entry in the .rela.plt section. */ | |
351f65ca | 2312 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
6de2ae4a | 2313 | htab->elf.srelplt->reloc_count++; |
c434dee6 AJ |
2314 | } |
2315 | else | |
2316 | { | |
2317 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 2318 | h->needs_plt = 0; |
c434dee6 AJ |
2319 | } |
2320 | } | |
2321 | else | |
2322 | { | |
2323 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 2324 | h->needs_plt = 0; |
c434dee6 AJ |
2325 | } |
2326 | ||
67a4f2b7 AO |
2327 | eh->tlsdesc_got = (bfd_vma) -1; |
2328 | ||
bffbf940 JJ |
2329 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
2330 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
2331 | if (h->got.refcount > 0 | |
1d85728f | 2332 | && info->executable |
bffbf940 | 2333 | && h->dynindx == -1 |
351f65ca | 2334 | && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) |
d8045f23 NC |
2335 | { |
2336 | h->got.offset = (bfd_vma) -1; | |
2337 | } | |
bffbf940 | 2338 | else if (h->got.refcount > 0) |
c434dee6 AJ |
2339 | { |
2340 | asection *s; | |
b34976b6 | 2341 | bfd_boolean dyn; |
351f65ca | 2342 | int tls_type = elf_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
2343 | |
2344 | /* Make sure this symbol is output as a dynamic symbol. | |
2345 | Undefined weak syms won't yet be marked as dynamic. */ | |
2346 | if (h->dynindx == -1 | |
f5385ebf | 2347 | && !h->forced_local) |
c434dee6 | 2348 | { |
c152c796 | 2349 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2350 | return FALSE; |
c434dee6 AJ |
2351 | } |
2352 | ||
67a4f2b7 AO |
2353 | if (GOT_TLS_GDESC_P (tls_type)) |
2354 | { | |
6de2ae4a | 2355 | eh->tlsdesc_got = htab->elf.sgotplt->size |
351f65ca | 2356 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2357 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2358 | h->got.offset = (bfd_vma) -2; |
2359 | } | |
2360 | if (! GOT_TLS_GDESC_P (tls_type) | |
2361 | || GOT_TLS_GD_P (tls_type)) | |
2362 | { | |
6de2ae4a | 2363 | s = htab->elf.sgot; |
67a4f2b7 AO |
2364 | h->got.offset = s->size; |
2365 | s->size += GOT_ENTRY_SIZE; | |
2366 | if (GOT_TLS_GD_P (tls_type)) | |
2367 | s->size += GOT_ENTRY_SIZE; | |
2368 | } | |
c434dee6 | 2369 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 JJ |
2370 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
2371 | and two if global. | |
2372 | R_X86_64_GOTTPOFF needs one dynamic relocation. */ | |
67a4f2b7 | 2373 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 2374 | || tls_type == GOT_TLS_IE) |
351f65ca | 2375 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 | 2376 | else if (GOT_TLS_GD_P (tls_type)) |
351f65ca | 2377 | htab->elf.srelgot->size += 2 * bed->s->sizeof_rela; |
67a4f2b7 AO |
2378 | else if (! GOT_TLS_GDESC_P (tls_type) |
2379 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2380 | || h->root.type != bfd_link_hash_undefweak) | |
27482721 AJ |
2381 | && (info->shared |
2382 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
351f65ca | 2383 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2384 | if (GOT_TLS_GDESC_P (tls_type)) |
2385 | { | |
351f65ca | 2386 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2387 | htab->tlsdesc_plt = (bfd_vma) -1; |
2388 | } | |
c434dee6 AJ |
2389 | } |
2390 | else | |
2391 | h->got.offset = (bfd_vma) -1; | |
2392 | ||
c434dee6 | 2393 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2394 | return TRUE; |
c434dee6 AJ |
2395 | |
2396 | /* In the shared -Bsymbolic case, discard space allocated for | |
2397 | dynamic pc-relative relocs against symbols which turn out to be | |
2398 | defined in regular objects. For the normal shared case, discard | |
2399 | space for pc-relative relocs that have become local due to symbol | |
2400 | visibility changes. */ | |
2401 | ||
2402 | if (info->shared) | |
2403 | { | |
27482721 AJ |
2404 | /* Relocs that use pc_count are those that appear on a call |
2405 | insn, or certain REL relocs that can generated via assembly. | |
2406 | We want calls to protected symbols to resolve directly to the | |
2407 | function rather than going via the plt. If people want | |
2408 | function pointer comparisons to work as expected then they | |
2409 | should avoid writing weird assembly. */ | |
2410 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 2411 | { |
e03a8ed8 | 2412 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
2413 | |
2414 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2415 | { | |
2416 | p->count -= p->pc_count; | |
2417 | p->pc_count = 0; | |
2418 | if (p->count == 0) | |
2419 | *pp = p->next; | |
2420 | else | |
2421 | pp = &p->next; | |
2422 | } | |
2423 | } | |
4e795f50 AM |
2424 | |
2425 | /* Also discard relocs on undefined weak syms with non-default | |
2426 | visibility. */ | |
22d606e9 | 2427 | if (eh->dyn_relocs != NULL |
4e795f50 | 2428 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
2429 | { |
2430 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2431 | eh->dyn_relocs = NULL; | |
2432 | ||
2433 | /* Make sure undefined weak symbols are output as a dynamic | |
2434 | symbol in PIEs. */ | |
2435 | else if (h->dynindx == -1 | |
d8045f23 NC |
2436 | && ! h->forced_local |
2437 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2438 | return FALSE; | |
22d606e9 | 2439 | } |
cbe950e9 | 2440 | |
d8045f23 | 2441 | } |
d40d037c | 2442 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
2443 | { |
2444 | /* For the non-shared case, discard space for relocs against | |
2445 | symbols which turn out to need copy relocs or are not | |
2446 | dynamic. */ | |
2447 | ||
f5385ebf AM |
2448 | if (!h->non_got_ref |
2449 | && ((h->def_dynamic | |
2450 | && !h->def_regular) | |
c434dee6 AJ |
2451 | || (htab->elf.dynamic_sections_created |
2452 | && (h->root.type == bfd_link_hash_undefweak | |
2453 | || h->root.type == bfd_link_hash_undefined)))) | |
2454 | { | |
2455 | /* Make sure this symbol is output as a dynamic symbol. | |
2456 | Undefined weak syms won't yet be marked as dynamic. */ | |
2457 | if (h->dynindx == -1 | |
d8045f23 NC |
2458 | && ! h->forced_local |
2459 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2460 | return FALSE; | |
c434dee6 AJ |
2461 | |
2462 | /* If that succeeded, we know we'll be keeping all the | |
2463 | relocs. */ | |
2464 | if (h->dynindx != -1) | |
2465 | goto keep; | |
2466 | } | |
2467 | ||
2468 | eh->dyn_relocs = NULL; | |
2469 | ||
2470 | keep: ; | |
2471 | } | |
2472 | ||
2473 | /* Finally, allocate space. */ | |
2474 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2475 | { | |
e7c33416 NC |
2476 | asection * sreloc; |
2477 | ||
cbe950e9 | 2478 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2479 | |
2480 | BFD_ASSERT (sreloc != NULL); | |
2481 | ||
351f65ca | 2482 | sreloc->size += p->count * bed->s->sizeof_rela; |
c434dee6 AJ |
2483 | } |
2484 | ||
b34976b6 | 2485 | return TRUE; |
c434dee6 AJ |
2486 | } |
2487 | ||
c25bc9fc L |
2488 | /* Allocate space in .plt, .got and associated reloc sections for |
2489 | local dynamic relocs. */ | |
2490 | ||
2491 | static bfd_boolean | |
351f65ca | 2492 | elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf) |
c25bc9fc L |
2493 | { |
2494 | struct elf_link_hash_entry *h | |
2495 | = (struct elf_link_hash_entry *) *slot; | |
2496 | ||
2497 | if (h->type != STT_GNU_IFUNC | |
2498 | || !h->def_regular | |
2499 | || !h->ref_regular | |
2500 | || !h->forced_local | |
2501 | || h->root.type != bfd_link_hash_defined) | |
2502 | abort (); | |
2503 | ||
351f65ca | 2504 | return elf_x86_64_allocate_dynrelocs (h, inf); |
c25bc9fc L |
2505 | } |
2506 | ||
c434dee6 AJ |
2507 | /* Find any dynamic relocs that apply to read-only sections. */ |
2508 | ||
b34976b6 | 2509 | static bfd_boolean |
351f65ca L |
2510 | elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h, |
2511 | void * inf) | |
c434dee6 | 2512 | { |
351f65ca | 2513 | struct elf_x86_64_link_hash_entry *eh; |
e03a8ed8 | 2514 | struct elf_dyn_relocs *p; |
c434dee6 | 2515 | |
aa715242 L |
2516 | /* Skip local IFUNC symbols. */ |
2517 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
2518 | return TRUE; | |
2519 | ||
351f65ca | 2520 | eh = (struct elf_x86_64_link_hash_entry *) h; |
c434dee6 AJ |
2521 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2522 | { | |
2523 | asection *s = p->sec->output_section; | |
2524 | ||
2525 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2526 | { | |
2527 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2528 | ||
2529 | info->flags |= DF_TEXTREL; | |
2530 | ||
b70321a2 L |
2531 | if (info->warn_shared_textrel && info->shared) |
2532 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"), | |
2533 | p->sec->owner, h->root.root.string, | |
2534 | p->sec); | |
2535 | ||
c434dee6 | 2536 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 2537 | return FALSE; |
c434dee6 AJ |
2538 | } |
2539 | } | |
b34976b6 | 2540 | return TRUE; |
c434dee6 AJ |
2541 | } |
2542 | ||
daa67607 L |
2543 | /* Convert |
2544 | mov foo@GOTPCREL(%rip), %reg | |
2545 | to | |
2546 | lea foo(%rip), %reg | |
2547 | with the local symbol, foo. */ | |
2548 | ||
2549 | static bfd_boolean | |
2550 | elf_x86_64_convert_mov_to_lea (bfd *abfd, asection *sec, | |
2551 | struct bfd_link_info *link_info) | |
2552 | { | |
2553 | Elf_Internal_Shdr *symtab_hdr; | |
2554 | Elf_Internal_Rela *internal_relocs; | |
2555 | Elf_Internal_Rela *irel, *irelend; | |
2556 | bfd_byte *contents; | |
2557 | struct elf_x86_64_link_hash_table *htab; | |
2558 | bfd_boolean changed_contents; | |
2559 | bfd_boolean changed_relocs; | |
2560 | bfd_signed_vma *local_got_refcounts; | |
2561 | ||
2562 | /* Don't even try to convert non-ELF outputs. */ | |
2563 | if (!is_elf_hash_table (link_info->hash)) | |
2564 | return FALSE; | |
2565 | ||
fbdc86d9 | 2566 | /* Nothing to do if there are no codes, no relocations or no output. */ |
daa67607 | 2567 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
fbdc86d9 L |
2568 | || sec->reloc_count == 0 |
2569 | || discarded_section (sec)) | |
daa67607 L |
2570 | return TRUE; |
2571 | ||
2572 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2573 | ||
2574 | /* Load the relocations for this section. */ | |
2575 | internal_relocs = (_bfd_elf_link_read_relocs | |
2576 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
2577 | link_info->keep_memory)); | |
2578 | if (internal_relocs == NULL) | |
2579 | return FALSE; | |
2580 | ||
2581 | htab = elf_x86_64_hash_table (link_info); | |
2582 | changed_contents = FALSE; | |
2583 | changed_relocs = FALSE; | |
2584 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2585 | ||
2586 | /* Get the section contents. */ | |
2587 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2588 | contents = elf_section_data (sec)->this_hdr.contents; | |
2589 | else | |
2590 | { | |
2591 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2592 | goto error_return; | |
2593 | } | |
2594 | ||
2595 | irelend = internal_relocs + sec->reloc_count; | |
2596 | for (irel = internal_relocs; irel < irelend; irel++) | |
2597 | { | |
2598 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
2599 | unsigned int r_symndx = htab->r_sym (irel->r_info); | |
2600 | unsigned int indx; | |
2601 | struct elf_link_hash_entry *h; | |
2602 | ||
2603 | if (r_type != R_X86_64_GOTPCREL) | |
2604 | continue; | |
2605 | ||
2606 | /* Get the symbol referred to by the reloc. */ | |
2607 | if (r_symndx < symtab_hdr->sh_info) | |
2608 | { | |
2609 | Elf_Internal_Sym *isym; | |
2610 | ||
2611 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2612 | abfd, r_symndx); | |
2613 | ||
2614 | /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */ | |
2615 | if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC | |
2616 | && bfd_get_8 (input_bfd, | |
2617 | contents + irel->r_offset - 2) == 0x8b) | |
2618 | { | |
2619 | bfd_put_8 (output_bfd, 0x8d, | |
2620 | contents + irel->r_offset - 2); | |
2621 | irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32); | |
2622 | if (local_got_refcounts != NULL | |
2623 | && local_got_refcounts[r_symndx] > 0) | |
2624 | local_got_refcounts[r_symndx] -= 1; | |
2625 | changed_contents = TRUE; | |
2626 | changed_relocs = TRUE; | |
2627 | } | |
2628 | continue; | |
2629 | } | |
2630 | ||
2631 | indx = r_symndx - symtab_hdr->sh_info; | |
2632 | h = elf_sym_hashes (abfd)[indx]; | |
2633 | BFD_ASSERT (h != NULL); | |
2634 | ||
2635 | while (h->root.type == bfd_link_hash_indirect | |
2636 | || h->root.type == bfd_link_hash_warning) | |
2637 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2638 | ||
3f65f599 L |
2639 | /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also |
2640 | avoid optimizing _DYNAMIC since ld.so may use its link-time | |
2641 | address. */ | |
daa67607 L |
2642 | if (h->def_regular |
2643 | && h->type != STT_GNU_IFUNC | |
9637f6ef | 2644 | && h != htab->elf.hdynamic |
daa67607 L |
2645 | && SYMBOL_REFERENCES_LOCAL (link_info, h) |
2646 | && bfd_get_8 (input_bfd, | |
2647 | contents + irel->r_offset - 2) == 0x8b) | |
2648 | { | |
2649 | bfd_put_8 (output_bfd, 0x8d, | |
2650 | contents + irel->r_offset - 2); | |
2651 | irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32); | |
2652 | if (h->got.refcount > 0) | |
2653 | h->got.refcount -= 1; | |
2654 | changed_contents = TRUE; | |
2655 | changed_relocs = TRUE; | |
2656 | } | |
2657 | } | |
2658 | ||
2659 | if (contents != NULL | |
2660 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2661 | { | |
2662 | if (!changed_contents && !link_info->keep_memory) | |
2663 | free (contents); | |
2664 | else | |
2665 | { | |
2666 | /* Cache the section contents for elf_link_input_bfd. */ | |
2667 | elf_section_data (sec)->this_hdr.contents = contents; | |
2668 | } | |
2669 | } | |
2670 | ||
2671 | if (elf_section_data (sec)->relocs != internal_relocs) | |
2672 | { | |
2673 | if (!changed_relocs) | |
2674 | free (internal_relocs); | |
2675 | else | |
2676 | elf_section_data (sec)->relocs = internal_relocs; | |
2677 | } | |
2678 | ||
2679 | return TRUE; | |
2680 | ||
2681 | error_return: | |
2682 | if (contents != NULL | |
2683 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2684 | free (contents); | |
2685 | if (internal_relocs != NULL | |
2686 | && elf_section_data (sec)->relocs != internal_relocs) | |
2687 | free (internal_relocs); | |
2688 | return FALSE; | |
2689 | } | |
2690 | ||
70256ad8 AJ |
2691 | /* Set the sizes of the dynamic sections. */ |
2692 | ||
b34976b6 | 2693 | static bfd_boolean |
351f65ca L |
2694 | elf_x86_64_size_dynamic_sections (bfd *output_bfd, |
2695 | struct bfd_link_info *info) | |
70256ad8 | 2696 | { |
351f65ca | 2697 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2698 | bfd *dynobj; |
2699 | asection *s; | |
b34976b6 | 2700 | bfd_boolean relocs; |
c434dee6 | 2701 | bfd *ibfd; |
351f65ca | 2702 | const struct elf_backend_data *bed; |
70256ad8 | 2703 | |
351f65ca | 2704 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2705 | if (htab == NULL) |
2706 | return FALSE; | |
351f65ca | 2707 | bed = get_elf_backend_data (output_bfd); |
4dfe6ac6 | 2708 | |
c434dee6 AJ |
2709 | dynobj = htab->elf.dynobj; |
2710 | if (dynobj == NULL) | |
2711 | abort (); | |
70256ad8 | 2712 | |
c434dee6 | 2713 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
2714 | { |
2715 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 2716 | if (info->executable) |
70256ad8 | 2717 | { |
3d4d4302 | 2718 | s = bfd_get_linker_section (dynobj, ".interp"); |
c434dee6 AJ |
2719 | if (s == NULL) |
2720 | abort (); | |
351f65ca L |
2721 | s->size = htab->dynamic_interpreter_size; |
2722 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
70256ad8 AJ |
2723 | } |
2724 | } | |
70256ad8 | 2725 | |
c434dee6 AJ |
2726 | /* Set up .got offsets for local syms, and space for local dynamic |
2727 | relocs. */ | |
2728 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
70256ad8 | 2729 | { |
c434dee6 AJ |
2730 | bfd_signed_vma *local_got; |
2731 | bfd_signed_vma *end_local_got; | |
bffbf940 | 2732 | char *local_tls_type; |
67a4f2b7 | 2733 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
2734 | bfd_size_type locsymcount; |
2735 | Elf_Internal_Shdr *symtab_hdr; | |
2736 | asection *srel; | |
70256ad8 | 2737 | |
0ffa91dd | 2738 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
2739 | continue; |
2740 | ||
c434dee6 | 2741 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 2742 | { |
e03a8ed8 | 2743 | struct elf_dyn_relocs *p; |
c434dee6 | 2744 | |
daa67607 L |
2745 | if (!elf_x86_64_convert_mov_to_lea (ibfd, s, info)) |
2746 | return FALSE; | |
2747 | ||
e03a8ed8 | 2748 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 2749 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
2750 | p != NULL; |
2751 | p = p->next) | |
70256ad8 | 2752 | { |
c434dee6 AJ |
2753 | if (!bfd_is_abs_section (p->sec) |
2754 | && bfd_is_abs_section (p->sec->output_section)) | |
2755 | { | |
2756 | /* Input section has been discarded, either because | |
2757 | it is a copy of a linkonce section or due to | |
2758 | linker script /DISCARD/, so we'll be discarding | |
2759 | the relocs too. */ | |
2760 | } | |
2761 | else if (p->count != 0) | |
2762 | { | |
2763 | srel = elf_section_data (p->sec)->sreloc; | |
351f65ca | 2764 | srel->size += p->count * bed->s->sizeof_rela; |
4b819e1f L |
2765 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
2766 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
2767 | { |
2768 | info->flags |= DF_TEXTREL; | |
2769 | if (info->warn_shared_textrel && info->shared) | |
2770 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"), | |
2771 | p->sec->owner, p->sec); | |
b70321a2 | 2772 | } |
c434dee6 | 2773 | } |
70256ad8 AJ |
2774 | } |
2775 | } | |
c434dee6 AJ |
2776 | |
2777 | local_got = elf_local_got_refcounts (ibfd); | |
2778 | if (!local_got) | |
2779 | continue; | |
2780 | ||
0ffa91dd | 2781 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
2782 | locsymcount = symtab_hdr->sh_info; |
2783 | end_local_got = local_got + locsymcount; | |
351f65ca L |
2784 | local_tls_type = elf_x86_64_local_got_tls_type (ibfd); |
2785 | local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd); | |
6de2ae4a L |
2786 | s = htab->elf.sgot; |
2787 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
2788 | for (; local_got < end_local_got; |
2789 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 2790 | { |
67a4f2b7 | 2791 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 2792 | if (*local_got > 0) |
70256ad8 | 2793 | { |
67a4f2b7 AO |
2794 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
2795 | { | |
6de2ae4a | 2796 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
351f65ca | 2797 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2798 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2799 | *local_got = (bfd_vma) -2; |
2800 | } | |
2801 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2802 | || GOT_TLS_GD_P (*local_tls_type)) | |
2803 | { | |
2804 | *local_got = s->size; | |
2805 | s->size += GOT_ENTRY_SIZE; | |
2806 | if (GOT_TLS_GD_P (*local_tls_type)) | |
2807 | s->size += GOT_ENTRY_SIZE; | |
2808 | } | |
bffbf940 | 2809 | if (info->shared |
67a4f2b7 | 2810 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 2811 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
2812 | { |
2813 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
2814 | { | |
6de2ae4a | 2815 | htab->elf.srelplt->size |
351f65ca | 2816 | += bed->s->sizeof_rela; |
67a4f2b7 AO |
2817 | htab->tlsdesc_plt = (bfd_vma) -1; |
2818 | } | |
2819 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2820 | || GOT_TLS_GD_P (*local_tls_type)) | |
351f65ca | 2821 | srel->size += bed->s->sizeof_rela; |
67a4f2b7 | 2822 | } |
70256ad8 AJ |
2823 | } |
2824 | else | |
c434dee6 AJ |
2825 | *local_got = (bfd_vma) -1; |
2826 | } | |
2827 | } | |
70256ad8 | 2828 | |
bffbf940 JJ |
2829 | if (htab->tls_ld_got.refcount > 0) |
2830 | { | |
2831 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
2832 | relocs. */ | |
6de2ae4a L |
2833 | htab->tls_ld_got.offset = htab->elf.sgot->size; |
2834 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; | |
351f65ca | 2835 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
bffbf940 JJ |
2836 | } |
2837 | else | |
2838 | htab->tls_ld_got.offset = -1; | |
2839 | ||
c434dee6 AJ |
2840 | /* Allocate global sym .plt and .got entries, and space for global |
2841 | sym dynamic relocs. */ | |
351f65ca | 2842 | elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs, |
eb4ff4d6 | 2843 | info); |
c434dee6 | 2844 | |
c25bc9fc L |
2845 | /* Allocate .plt and .got entries, and space for local symbols. */ |
2846 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 2847 | elf_x86_64_allocate_local_dynrelocs, |
c25bc9fc L |
2848 | info); |
2849 | ||
67a4f2b7 AO |
2850 | /* For every jump slot reserved in the sgotplt, reloc_count is |
2851 | incremented. However, when we reserve space for TLS descriptors, | |
2852 | it's not incremented, so in order to compute the space reserved | |
2853 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 L |
2854 | slot size. |
2855 | ||
2856 | PR ld/13302: We start next_irelative_index at the end of .rela.plt | |
2857 | so that R_X86_64_IRELATIVE entries come last. */ | |
6de2ae4a | 2858 | if (htab->elf.srelplt) |
e1f98742 L |
2859 | { |
2860 | htab->sgotplt_jump_table_size | |
2861 | = elf_x86_64_compute_jump_table_size (htab); | |
2862 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
2863 | } | |
2864 | else if (htab->elf.irelplt) | |
2865 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
67a4f2b7 AO |
2866 | |
2867 | if (htab->tlsdesc_plt) | |
2868 | { | |
2869 | /* If we're not using lazy TLS relocations, don't generate the | |
2870 | PLT and GOT entries they require. */ | |
2871 | if ((info->flags & DF_BIND_NOW)) | |
2872 | htab->tlsdesc_plt = 0; | |
2873 | else | |
2874 | { | |
6de2ae4a L |
2875 | htab->tlsdesc_got = htab->elf.sgot->size; |
2876 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
2877 | /* Reserve room for the initial entry. |
2878 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a | 2879 | if (htab->elf.splt->size == 0) |
eed180f8 | 2880 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
6de2ae4a | 2881 | htab->tlsdesc_plt = htab->elf.splt->size; |
eed180f8 | 2882 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
67a4f2b7 AO |
2883 | } |
2884 | } | |
2885 | ||
a7b16ceb L |
2886 | if (htab->elf.sgotplt) |
2887 | { | |
2888 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
eed180f8 | 2889 | entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
2890 | if ((htab->elf.hgot == NULL |
2891 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
2892 | && (htab->elf.sgotplt->size |
2893 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
2894 | && (htab->elf.splt == NULL |
2895 | || htab->elf.splt->size == 0) | |
2896 | && (htab->elf.sgot == NULL | |
2897 | || htab->elf.sgot->size == 0) | |
2898 | && (htab->elf.iplt == NULL | |
2899 | || htab->elf.iplt->size == 0) | |
2900 | && (htab->elf.igotplt == NULL | |
2901 | || htab->elf.igotplt->size == 0)) | |
2902 | htab->elf.sgotplt->size = 0; | |
2903 | } | |
2904 | ||
9a2a56cc AM |
2905 | if (htab->plt_eh_frame != NULL |
2906 | && htab->elf.splt != NULL | |
2907 | && htab->elf.splt->size != 0 | |
2908 | && !bfd_is_abs_section (htab->elf.splt->output_section) | |
2909 | && _bfd_elf_eh_frame_present (info)) | |
2910 | { | |
2911 | const struct elf_x86_64_backend_data *arch_data | |
2912 | = (const struct elf_x86_64_backend_data *) bed->arch_data; | |
2913 | htab->plt_eh_frame->size = arch_data->eh_frame_plt_size; | |
2914 | } | |
2915 | ||
c434dee6 AJ |
2916 | /* We now have determined the sizes of the various dynamic sections. |
2917 | Allocate memory for them. */ | |
b34976b6 | 2918 | relocs = FALSE; |
c434dee6 AJ |
2919 | for (s = dynobj->sections; s != NULL; s = s->next) |
2920 | { | |
2921 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2922 | continue; | |
2923 | ||
6de2ae4a L |
2924 | if (s == htab->elf.splt |
2925 | || s == htab->elf.sgot | |
2926 | || s == htab->elf.sgotplt | |
2927 | || s == htab->elf.iplt | |
2928 | || s == htab->elf.igotplt | |
9a2a56cc | 2929 | || s == htab->plt_eh_frame |
75ff4589 | 2930 | || s == htab->sdynbss) |
c434dee6 AJ |
2931 | { |
2932 | /* Strip this section if we don't need it; see the | |
2933 | comment below. */ | |
2934 | } | |
0112cd26 | 2935 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 2936 | { |
6de2ae4a | 2937 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 2938 | relocs = TRUE; |
c434dee6 AJ |
2939 | |
2940 | /* We use the reloc_count field as a counter if we need | |
2941 | to copy relocs into the output file. */ | |
6de2ae4a | 2942 | if (s != htab->elf.srelplt) |
67a4f2b7 | 2943 | s->reloc_count = 0; |
70256ad8 | 2944 | } |
c434dee6 | 2945 | else |
70256ad8 AJ |
2946 | { |
2947 | /* It's not one of our sections, so don't allocate space. */ | |
2948 | continue; | |
2949 | } | |
2950 | ||
eea6121a | 2951 | if (s->size == 0) |
70256ad8 | 2952 | { |
c434dee6 AJ |
2953 | /* If we don't need this section, strip it from the |
2954 | output file. This is mostly to handle .rela.bss and | |
2955 | .rela.plt. We must create both sections in | |
2956 | create_dynamic_sections, because they must be created | |
2957 | before the linker maps input sections to output | |
2958 | sections. The linker does that before | |
2959 | adjust_dynamic_symbol is called, and it is that | |
2960 | function which decides whether anything needs to go | |
2961 | into these sections. */ | |
2962 | ||
8423293d | 2963 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
2964 | continue; |
2965 | } | |
2966 | ||
c456f082 AM |
2967 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
2968 | continue; | |
2969 | ||
70256ad8 AJ |
2970 | /* Allocate memory for the section contents. We use bfd_zalloc |
2971 | here in case unused entries are not reclaimed before the | |
2972 | section's contents are written out. This should not happen, | |
2973 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
2974 | of garbage. */ | |
eea6121a | 2975 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 2976 | if (s->contents == NULL) |
b34976b6 | 2977 | return FALSE; |
70256ad8 AJ |
2978 | } |
2979 | ||
e41b3a13 | 2980 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
2981 | && htab->plt_eh_frame->contents != NULL) |
2982 | { | |
2983 | const struct elf_x86_64_backend_data *arch_data | |
2984 | = (const struct elf_x86_64_backend_data *) bed->arch_data; | |
2985 | ||
2986 | memcpy (htab->plt_eh_frame->contents, | |
2987 | arch_data->eh_frame_plt, htab->plt_eh_frame->size); | |
2988 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
2989 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
2990 | } | |
e41b3a13 | 2991 | |
c434dee6 | 2992 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
2993 | { |
2994 | /* Add some entries to the .dynamic section. We fill in the | |
351f65ca | 2995 | values later, in elf_x86_64_finish_dynamic_sections, but we |
70256ad8 | 2996 | must add the entries now so that we get the correct size for |
407443a3 | 2997 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 2998 | dynamic linker and used by the debugger. */ |
dc810e39 | 2999 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3000 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3001 | |
36af4a4e | 3002 | if (info->executable) |
70256ad8 | 3003 | { |
dc810e39 | 3004 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3005 | return FALSE; |
70256ad8 AJ |
3006 | } |
3007 | ||
6de2ae4a | 3008 | if (htab->elf.splt->size != 0) |
70256ad8 | 3009 | { |
dc810e39 AM |
3010 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
3011 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
3012 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
3013 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 3014 | return FALSE; |
67a4f2b7 AO |
3015 | |
3016 | if (htab->tlsdesc_plt | |
3017 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
3018 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
3019 | return FALSE; | |
70256ad8 AJ |
3020 | } |
3021 | ||
3022 | if (relocs) | |
3023 | { | |
dc810e39 AM |
3024 | if (!add_dynamic_entry (DT_RELA, 0) |
3025 | || !add_dynamic_entry (DT_RELASZ, 0) | |
351f65ca | 3026 | || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela)) |
b34976b6 | 3027 | return FALSE; |
70256ad8 | 3028 | |
c434dee6 AJ |
3029 | /* If any dynamic relocs apply to a read-only section, |
3030 | then we need a DT_TEXTREL entry. */ | |
3031 | if ((info->flags & DF_TEXTREL) == 0) | |
eed180f8 | 3032 | elf_link_hash_traverse (&htab->elf, |
351f65ca | 3033 | elf_x86_64_readonly_dynrelocs, |
eb4ff4d6 | 3034 | info); |
c434dee6 AJ |
3035 | |
3036 | if ((info->flags & DF_TEXTREL) != 0) | |
3037 | { | |
3038 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 3039 | return FALSE; |
c434dee6 | 3040 | } |
70256ad8 AJ |
3041 | } |
3042 | } | |
dc810e39 | 3043 | #undef add_dynamic_entry |
70256ad8 | 3044 | |
b34976b6 | 3045 | return TRUE; |
70256ad8 AJ |
3046 | } |
3047 | ||
67a4f2b7 | 3048 | static bfd_boolean |
351f65ca L |
3049 | elf_x86_64_always_size_sections (bfd *output_bfd, |
3050 | struct bfd_link_info *info) | |
67a4f2b7 AO |
3051 | { |
3052 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3053 | ||
3054 | if (tls_sec) | |
3055 | { | |
3056 | struct elf_link_hash_entry *tlsbase; | |
3057 | ||
3058 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3059 | "_TLS_MODULE_BASE_", | |
3060 | FALSE, FALSE, FALSE); | |
3061 | ||
3062 | if (tlsbase && tlsbase->type == STT_TLS) | |
3063 | { | |
351f65ca | 3064 | struct elf_x86_64_link_hash_table *htab; |
67a4f2b7 AO |
3065 | struct bfd_link_hash_entry *bh = NULL; |
3066 | const struct elf_backend_data *bed | |
3067 | = get_elf_backend_data (output_bfd); | |
3068 | ||
351f65ca | 3069 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3070 | if (htab == NULL) |
3071 | return FALSE; | |
3072 | ||
67a4f2b7 AO |
3073 | if (!(_bfd_generic_link_add_one_symbol |
3074 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3075 | tls_sec, 0, NULL, FALSE, | |
3076 | bed->collect, &bh))) | |
3077 | return FALSE; | |
9f03412a | 3078 | |
4dfe6ac6 | 3079 | htab->tls_module_base = bh; |
9f03412a | 3080 | |
67a4f2b7 AO |
3081 | tlsbase = (struct elf_link_hash_entry *)bh; |
3082 | tlsbase->def_regular = 1; | |
3083 | tlsbase->other = STV_HIDDEN; | |
3084 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
3085 | } | |
3086 | } | |
3087 | ||
3088 | return TRUE; | |
3089 | } | |
3090 | ||
9f03412a AO |
3091 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
3092 | executables. Rather than setting it to the beginning of the TLS | |
3093 | section, we have to set it to the end. This function may be called | |
3094 | multiple times, it is idempotent. */ | |
3095 | ||
3096 | static void | |
351f65ca | 3097 | elf_x86_64_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 3098 | { |
351f65ca | 3099 | struct elf_x86_64_link_hash_table *htab; |
9f03412a AO |
3100 | struct bfd_link_hash_entry *base; |
3101 | ||
3102 | if (!info->executable) | |
3103 | return; | |
3104 | ||
351f65ca | 3105 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3106 | if (htab == NULL) |
3107 | return; | |
9f03412a | 3108 | |
4dfe6ac6 NC |
3109 | base = htab->tls_module_base; |
3110 | if (base == NULL) | |
9f03412a AO |
3111 | return; |
3112 | ||
4dfe6ac6 | 3113 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
3114 | } |
3115 | ||
bffbf940 JJ |
3116 | /* Return the base VMA address which should be subtracted from real addresses |
3117 | when resolving @dtpoff relocation. | |
3118 | This is PT_TLS segment p_vaddr. */ | |
3119 | ||
3120 | static bfd_vma | |
351f65ca | 3121 | elf_x86_64_dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 3122 | { |
e1918d23 AM |
3123 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3124 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 3125 | return 0; |
e1918d23 | 3126 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
3127 | } |
3128 | ||
3129 | /* Return the relocation value for @tpoff relocation | |
3130 | if STT_TLS virtual address is ADDRESS. */ | |
3131 | ||
3132 | static bfd_vma | |
351f65ca | 3133 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 3134 | { |
e1918d23 | 3135 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3136 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3137 | bfd_vma static_tls_size; | |
bffbf940 JJ |
3138 | |
3139 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 3140 | if (htab->tls_sec == NULL) |
bffbf940 | 3141 | return 0; |
7dc98aea RO |
3142 | |
3143 | /* Consider special static TLS alignment requirements. */ | |
3144 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3145 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
3146 | } |
3147 | ||
90f487df L |
3148 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
3149 | branch? */ | |
3150 | ||
3151 | static bfd_boolean | |
3152 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
3153 | { | |
3154 | /* Opcode Instruction | |
3155 | 0xe8 call | |
3156 | 0xe9 jump | |
3157 | 0x0f 0x8x conditional jump */ | |
3158 | return ((offset > 0 | |
3159 | && (contents [offset - 1] == 0xe8 | |
3160 | || contents [offset - 1] == 0xe9)) | |
3161 | || (offset > 1 | |
3162 | && contents [offset - 2] == 0x0f | |
3163 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
3164 | } | |
3165 | ||
8d88c4ca NC |
3166 | /* Relocate an x86_64 ELF section. */ |
3167 | ||
b34976b6 | 3168 | static bfd_boolean |
351f65ca L |
3169 | elf_x86_64_relocate_section (bfd *output_bfd, |
3170 | struct bfd_link_info *info, | |
3171 | bfd *input_bfd, | |
3172 | asection *input_section, | |
3173 | bfd_byte *contents, | |
3174 | Elf_Internal_Rela *relocs, | |
3175 | Elf_Internal_Sym *local_syms, | |
3176 | asection **local_sections) | |
8d88c4ca | 3177 | { |
351f65ca | 3178 | struct elf_x86_64_link_hash_table *htab; |
8d88c4ca NC |
3179 | Elf_Internal_Shdr *symtab_hdr; |
3180 | struct elf_link_hash_entry **sym_hashes; | |
3181 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3182 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 3183 | Elf_Internal_Rela *rel; |
8d88c4ca | 3184 | Elf_Internal_Rela *relend; |
eed180f8 | 3185 | const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
8d88c4ca | 3186 | |
0ffa91dd NC |
3187 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
3188 | ||
351f65ca | 3189 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3190 | if (htab == NULL) |
3191 | return FALSE; | |
0ffa91dd | 3192 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
3193 | sym_hashes = elf_sym_hashes (input_bfd); |
3194 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
351f65ca | 3195 | local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 3196 | |
351f65ca | 3197 | elf_x86_64_set_tls_module_base (info); |
9f03412a | 3198 | |
c434dee6 | 3199 | rel = relocs; |
8d88c4ca | 3200 | relend = relocs + input_section->reloc_count; |
c434dee6 | 3201 | for (; rel < relend; rel++) |
8d88c4ca | 3202 | { |
bffbf940 | 3203 | unsigned int r_type; |
8d88c4ca NC |
3204 | reloc_howto_type *howto; |
3205 | unsigned long r_symndx; | |
3206 | struct elf_link_hash_entry *h; | |
3207 | Elf_Internal_Sym *sym; | |
3208 | asection *sec; | |
67a4f2b7 | 3209 | bfd_vma off, offplt; |
8d88c4ca | 3210 | bfd_vma relocation; |
b34976b6 | 3211 | bfd_boolean unresolved_reloc; |
8d88c4ca | 3212 | bfd_reloc_status_type r; |
bffbf940 | 3213 | int tls_type; |
cbe950e9 | 3214 | asection *base_got; |
1788fc08 | 3215 | bfd_vma st_size; |
8d88c4ca | 3216 | |
351f65ca | 3217 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
3218 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
3219 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
3220 | continue; | |
8d88c4ca | 3221 | |
9911c0fc | 3222 | if (r_type >= (int) R_X86_64_standard) |
8da6118f | 3223 | { |
9911c0fc L |
3224 | (*_bfd_error_handler) |
3225 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), | |
3226 | input_bfd, input_section, r_type); | |
8da6118f | 3227 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 3228 | return FALSE; |
8da6118f | 3229 | } |
8d88c4ca | 3230 | |
d7921315 | 3231 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 3232 | || ABI_64_P (output_bfd)) |
d7921315 L |
3233 | howto = x86_64_elf_howto_table + r_type; |
3234 | else | |
3235 | howto = (x86_64_elf_howto_table | |
3236 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 3237 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
3238 | h = NULL; |
3239 | sym = NULL; | |
3240 | sec = NULL; | |
b34976b6 | 3241 | unresolved_reloc = FALSE; |
8d88c4ca | 3242 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
3243 | { |
3244 | sym = local_syms + r_symndx; | |
3245 | sec = local_sections[r_symndx]; | |
c434dee6 | 3246 | |
c25bc9fc L |
3247 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
3248 | &sec, rel); | |
1788fc08 | 3249 | st_size = sym->st_size; |
c25bc9fc L |
3250 | |
3251 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
1f85278f | 3252 | if (!info->relocatable |
351f65ca | 3253 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 3254 | { |
351f65ca L |
3255 | h = elf_x86_64_get_local_sym_hash (htab, input_bfd, |
3256 | rel, FALSE); | |
c25bc9fc L |
3257 | if (h == NULL) |
3258 | abort (); | |
3259 | ||
eed180f8 | 3260 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
3261 | h->root.u.def.value = sym->st_value; |
3262 | h->root.u.def.section = sec; | |
3263 | } | |
8da6118f | 3264 | } |
8d88c4ca | 3265 | else |
8da6118f | 3266 | { |
c9736ba0 | 3267 | bfd_boolean warned ATTRIBUTE_UNUSED; |
c434dee6 | 3268 | |
b2a8e766 AM |
3269 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3270 | r_symndx, symtab_hdr, sym_hashes, | |
3271 | h, sec, relocation, | |
3272 | unresolved_reloc, warned); | |
1788fc08 | 3273 | st_size = h->size; |
8da6118f | 3274 | } |
ab96bf03 | 3275 | |
dbaa2011 | 3276 | if (sec != NULL && discarded_section (sec)) |
0672748a | 3277 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 3278 | rel, 1, relend, howto, 0, contents); |
ab96bf03 AM |
3279 | |
3280 | if (info->relocatable) | |
3281 | continue; | |
3282 | ||
1788fc08 | 3283 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 3284 | { |
1788fc08 L |
3285 | if (r_type == R_X86_64_64) |
3286 | { | |
3287 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
3288 | zero-extend it to 64bit if addend is zero. */ | |
3289 | r_type = R_X86_64_32; | |
3290 | memset (contents + rel->r_offset + 4, 0, 4); | |
3291 | } | |
3292 | else if (r_type == R_X86_64_SIZE64) | |
3293 | { | |
3294 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
3295 | zero-extend it to 64bit if addend is zero. */ | |
3296 | r_type = R_X86_64_SIZE32; | |
3297 | memset (contents + rel->r_offset + 4, 0, 4); | |
3298 | } | |
64d25c44 L |
3299 | } |
3300 | ||
cbe950e9 L |
3301 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3302 | it here if it is defined in a non-shared object. */ | |
3303 | if (h != NULL | |
3304 | && h->type == STT_GNU_IFUNC | |
3305 | && h->def_regular) | |
3306 | { | |
3307 | asection *plt; | |
3308 | bfd_vma plt_index; | |
4c544807 | 3309 | const char *name; |
cbe950e9 L |
3310 | |
3311 | if ((input_section->flags & SEC_ALLOC) == 0 | |
3312 | || h->plt.offset == (bfd_vma) -1) | |
3313 | abort (); | |
3314 | ||
3315 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 3316 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
cbe950e9 L |
3317 | relocation = (plt->output_section->vma |
3318 | + plt->output_offset + h->plt.offset); | |
3319 | ||
3320 | switch (r_type) | |
3321 | { | |
3322 | default: | |
4c544807 L |
3323 | if (h->root.root.string) |
3324 | name = h->root.root.string; | |
3325 | else | |
3326 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
3327 | NULL); | |
cbe950e9 L |
3328 | (*_bfd_error_handler) |
3329 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
3330 | "symbol `%s' isn't handled by %s"), input_bfd, | |
3331 | x86_64_elf_howto_table[r_type].name, | |
4c544807 | 3332 | name, __FUNCTION__); |
cbe950e9 L |
3333 | bfd_set_error (bfd_error_bad_value); |
3334 | return FALSE; | |
3335 | ||
3336 | case R_X86_64_32S: | |
710ab287 | 3337 | if (info->shared) |
cbe950e9 | 3338 | abort (); |
710ab287 L |
3339 | goto do_relocation; |
3340 | ||
248775ba L |
3341 | case R_X86_64_32: |
3342 | if (ABI_64_P (output_bfd)) | |
3343 | goto do_relocation; | |
17672001 | 3344 | /* FALLTHROUGH */ |
eed180f8 | 3345 | case R_X86_64_64: |
710ab287 L |
3346 | if (rel->r_addend != 0) |
3347 | { | |
4c544807 L |
3348 | if (h->root.root.string) |
3349 | name = h->root.root.string; | |
3350 | else | |
3351 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3352 | sym, NULL); | |
710ab287 L |
3353 | (*_bfd_error_handler) |
3354 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
3355 | "symbol `%s' has non-zero addend: %d"), | |
3356 | input_bfd, x86_64_elf_howto_table[r_type].name, | |
4c544807 | 3357 | name, rel->r_addend); |
710ab287 L |
3358 | bfd_set_error (bfd_error_bad_value); |
3359 | return FALSE; | |
3360 | } | |
3361 | ||
3362 | /* Generate dynamic relcoation only when there is a | |
c293fa49 | 3363 | non-GOT reference in a shared object. */ |
710ab287 L |
3364 | if (info->shared && h->non_got_ref) |
3365 | { | |
3366 | Elf_Internal_Rela outrel; | |
710ab287 L |
3367 | asection *sreloc; |
3368 | ||
c25bc9fc L |
3369 | /* Need a dynamic relocation to get the real function |
3370 | address. */ | |
710ab287 L |
3371 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
3372 | info, | |
3373 | input_section, | |
3374 | rel->r_offset); | |
3375 | if (outrel.r_offset == (bfd_vma) -1 | |
3376 | || outrel.r_offset == (bfd_vma) -2) | |
3377 | abort (); | |
3378 | ||
3379 | outrel.r_offset += (input_section->output_section->vma | |
3380 | + input_section->output_offset); | |
3381 | ||
3382 | if (h->dynindx == -1 | |
44c4ea11 L |
3383 | || h->forced_local |
3384 | || info->executable) | |
710ab287 L |
3385 | { |
3386 | /* This symbol is resolved locally. */ | |
56b8aada L |
3387 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
3388 | outrel.r_addend = (h->root.u.def.value | |
3389 | + h->root.u.def.section->output_section->vma | |
3390 | + h->root.u.def.section->output_offset); | |
710ab287 L |
3391 | } |
3392 | else | |
3393 | { | |
351f65ca | 3394 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
3395 | outrel.r_addend = 0; |
3396 | } | |
3397 | ||
6de2ae4a | 3398 | sreloc = htab->elf.irelifunc; |
351f65ca | 3399 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
3400 | |
3401 | /* If this reloc is against an external symbol, we | |
3402 | do not want to fiddle with the addend. Otherwise, | |
3403 | we need to include the symbol value so that it | |
3404 | becomes an addend for the dynamic reloc. For an | |
3405 | internal symbol, we have updated addend. */ | |
56b8aada | 3406 | continue; |
710ab287 | 3407 | } |
17672001 | 3408 | /* FALLTHROUGH */ |
cbe950e9 L |
3409 | case R_X86_64_PC32: |
3410 | case R_X86_64_PC64: | |
3411 | case R_X86_64_PLT32: | |
3412 | goto do_relocation; | |
3413 | ||
3414 | case R_X86_64_GOTPCREL: | |
3415 | case R_X86_64_GOTPCREL64: | |
6de2ae4a | 3416 | base_got = htab->elf.sgot; |
cbe950e9 L |
3417 | off = h->got.offset; |
3418 | ||
7afd84dc | 3419 | if (base_got == NULL) |
cbe950e9 L |
3420 | abort (); |
3421 | ||
7afd84dc | 3422 | if (off == (bfd_vma) -1) |
cbe950e9 | 3423 | { |
7afd84dc L |
3424 | /* We can't use h->got.offset here to save state, or |
3425 | even just remember the offset, as finish_dynamic_symbol | |
3426 | would use that as offset into .got. */ | |
cbe950e9 | 3427 | |
6de2ae4a | 3428 | if (htab->elf.splt != NULL) |
7afd84dc | 3429 | { |
eed180f8 | 3430 | plt_index = h->plt.offset / plt_entry_size - 1; |
7afd84dc | 3431 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 3432 | base_got = htab->elf.sgotplt; |
7afd84dc | 3433 | } |
cbe950e9 L |
3434 | else |
3435 | { | |
eed180f8 | 3436 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 3437 | off = plt_index * GOT_ENTRY_SIZE; |
6de2ae4a | 3438 | base_got = htab->elf.igotplt; |
7afd84dc L |
3439 | } |
3440 | ||
3441 | if (h->dynindx == -1 | |
3442 | || h->forced_local | |
3443 | || info->symbolic) | |
3444 | { | |
eed180f8 | 3445 | /* This references the local defitionion. We must |
7afd84dc | 3446 | initialize this entry in the global offset table. |
eed180f8 | 3447 | Since the offset must always be a multiple of 8, |
7afd84dc L |
3448 | we use the least significant bit to record |
3449 | whether we have initialized it already. | |
3450 | ||
3451 | When doing a dynamic link, we create a .rela.got | |
3452 | relocation entry to initialize the value. This | |
3453 | is done in the finish_dynamic_symbol routine. */ | |
3454 | if ((off & 1) != 0) | |
3455 | off &= ~1; | |
3456 | else | |
3457 | { | |
3458 | bfd_put_64 (output_bfd, relocation, | |
3459 | base_got->contents + off); | |
3460 | /* Note that this is harmless for the GOTPLT64 | |
3461 | case, as -1 | 1 still is -1. */ | |
3462 | h->got.offset |= 1; | |
3463 | } | |
cbe950e9 L |
3464 | } |
3465 | } | |
3466 | ||
3467 | relocation = (base_got->output_section->vma | |
3468 | + base_got->output_offset + off); | |
3469 | ||
cbe950e9 L |
3470 | goto do_relocation; |
3471 | } | |
3472 | } | |
3473 | ||
70256ad8 AJ |
3474 | /* When generating a shared object, the relocations handled here are |
3475 | copied into the output file to be resolved at run time. */ | |
3476 | switch (r_type) | |
3477 | { | |
3478 | case R_X86_64_GOT32: | |
7b81dfbb | 3479 | case R_X86_64_GOT64: |
70256ad8 AJ |
3480 | /* Relocation is to the entry for this symbol in the global |
3481 | offset table. */ | |
70256ad8 | 3482 | case R_X86_64_GOTPCREL: |
7b81dfbb AJ |
3483 | case R_X86_64_GOTPCREL64: |
3484 | /* Use global offset table entry as symbol value. */ | |
3485 | case R_X86_64_GOTPLT64: | |
3486 | /* This is the same as GOT64 for relocation purposes, but | |
3487 | indicates the existence of a PLT entry. The difficulty is, | |
3488 | that we must calculate the GOT slot offset from the PLT | |
3489 | offset, if this symbol got a PLT entry (it was global). | |
3490 | Additionally if it's computed from the PLT entry, then that | |
3491 | GOT offset is relative to .got.plt, not to .got. */ | |
6de2ae4a | 3492 | base_got = htab->elf.sgot; |
7b81dfbb | 3493 | |
6de2ae4a | 3494 | if (htab->elf.sgot == NULL) |
c434dee6 | 3495 | abort (); |
053579d7 | 3496 | |
51e0a107 | 3497 | if (h != NULL) |
70256ad8 | 3498 | { |
b34976b6 | 3499 | bfd_boolean dyn; |
c434dee6 AJ |
3500 | |
3501 | off = h->got.offset; | |
7b81dfbb | 3502 | if (h->needs_plt |
eed180f8 | 3503 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
3504 | && off == (bfd_vma)-1) |
3505 | { | |
3506 | /* We can't use h->got.offset here to save | |
3507 | state, or even just remember the offset, as | |
3508 | finish_dynamic_symbol would use that as offset into | |
3509 | .got. */ | |
eed180f8 | 3510 | bfd_vma plt_index = h->plt.offset / plt_entry_size - 1; |
7b81dfbb | 3511 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 3512 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
3513 | } |
3514 | ||
c434dee6 | 3515 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 3516 | |
27482721 | 3517 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
51e0a107 | 3518 | || (info->shared |
27482721 | 3519 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
3520 | || (ELF_ST_VISIBILITY (h->other) |
3521 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
3522 | { |
3523 | /* This is actually a static link, or it is a -Bsymbolic | |
3524 | link and the symbol is defined locally, or the symbol | |
407443a3 | 3525 | was forced to be local because of a version file. We |
51e0a107 JH |
3526 | must initialize this entry in the global offset table. |
3527 | Since the offset must always be a multiple of 8, we | |
3528 | use the least significant bit to record whether we | |
3529 | have initialized it already. | |
3530 | ||
3531 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
3532 | relocation entry to initialize the value. This is |
3533 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
3534 | if ((off & 1) != 0) |
3535 | off &= ~1; | |
3536 | else | |
3537 | { | |
3538 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
3539 | base_got->contents + off); |
3540 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 3541 | as -1 | 1 still is -1. */ |
51e0a107 JH |
3542 | h->got.offset |= 1; |
3543 | } | |
3544 | } | |
053579d7 | 3545 | else |
b34976b6 | 3546 | unresolved_reloc = FALSE; |
70256ad8 | 3547 | } |
51e0a107 JH |
3548 | else |
3549 | { | |
c434dee6 AJ |
3550 | if (local_got_offsets == NULL) |
3551 | abort (); | |
51e0a107 JH |
3552 | |
3553 | off = local_got_offsets[r_symndx]; | |
3554 | ||
3555 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
3556 | the least significant bit to record whether we have |
3557 | already generated the necessary reloc. */ | |
51e0a107 JH |
3558 | if ((off & 1) != 0) |
3559 | off &= ~1; | |
3560 | else | |
3561 | { | |
c434dee6 | 3562 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 3563 | base_got->contents + off); |
51e0a107 JH |
3564 | |
3565 | if (info->shared) | |
3566 | { | |
947216bf | 3567 | asection *s; |
51e0a107 | 3568 | Elf_Internal_Rela outrel; |
70256ad8 | 3569 | |
51e0a107 JH |
3570 | /* We need to generate a R_X86_64_RELATIVE reloc |
3571 | for the dynamic linker. */ | |
6de2ae4a | 3572 | s = htab->elf.srelgot; |
947216bf | 3573 | if (s == NULL) |
c434dee6 | 3574 | abort (); |
51e0a107 | 3575 | |
7b81dfbb AJ |
3576 | outrel.r_offset = (base_got->output_section->vma |
3577 | + base_got->output_offset | |
51e0a107 | 3578 | + off); |
351f65ca | 3579 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
51e0a107 | 3580 | outrel.r_addend = relocation; |
351f65ca | 3581 | elf_append_rela (output_bfd, s, &outrel); |
51e0a107 JH |
3582 | } |
3583 | ||
3584 | local_got_offsets[r_symndx] |= 1; | |
3585 | } | |
51e0a107 | 3586 | } |
6a2bda3f | 3587 | |
c434dee6 AJ |
3588 | if (off >= (bfd_vma) -2) |
3589 | abort (); | |
3590 | ||
7b81dfbb AJ |
3591 | relocation = base_got->output_section->vma |
3592 | + base_got->output_offset + off; | |
3593 | if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
3594 | relocation -= htab->elf.sgotplt->output_section->vma |
3595 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 3596 | |
70256ad8 AJ |
3597 | break; |
3598 | ||
d6ab8113 JB |
3599 | case R_X86_64_GOTOFF64: |
3600 | /* Relocation is relative to the start of the global offset | |
3601 | table. */ | |
3602 | ||
3603 | /* Check to make sure it isn't a protected function symbol | |
3604 | for shared library since it may not be local when used | |
3605 | as function address. */ | |
bdb892b9 | 3606 | if (!info->executable |
d6ab8113 | 3607 | && h |
bdb892b9 | 3608 | && !SYMBOLIC_BIND (info, h) |
d6ab8113 JB |
3609 | && h->def_regular |
3610 | && h->type == STT_FUNC | |
3611 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
3612 | { | |
3613 | (*_bfd_error_handler) | |
3614 | (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"), | |
3615 | input_bfd, h->root.root.string); | |
3616 | bfd_set_error (bfd_error_bad_value); | |
3617 | return FALSE; | |
3618 | } | |
3619 | ||
3620 | /* Note that sgot is not involved in this | |
3621 | calculation. We always want the start of .got.plt. If we | |
3622 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
3623 | permitted by the ABI, we might have to change this | |
3624 | calculation. */ | |
6de2ae4a L |
3625 | relocation -= htab->elf.sgotplt->output_section->vma |
3626 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3627 | break; |
3628 | ||
3629 | case R_X86_64_GOTPC32: | |
7b81dfbb | 3630 | case R_X86_64_GOTPC64: |
d6ab8113 | 3631 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
3632 | relocation = htab->elf.sgotplt->output_section->vma |
3633 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3634 | unresolved_reloc = FALSE; |
3635 | break; | |
7b81dfbb AJ |
3636 | |
3637 | case R_X86_64_PLTOFF64: | |
3638 | /* Relocation is PLT entry relative to GOT. For local | |
3639 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 3640 | if (h != NULL |
7b81dfbb AJ |
3641 | /* See PLT32 handling. */ |
3642 | && h->plt.offset != (bfd_vma) -1 | |
6de2ae4a | 3643 | && htab->elf.splt != NULL) |
7b81dfbb | 3644 | { |
6de2ae4a L |
3645 | relocation = (htab->elf.splt->output_section->vma |
3646 | + htab->elf.splt->output_offset | |
7b81dfbb AJ |
3647 | + h->plt.offset); |
3648 | unresolved_reloc = FALSE; | |
3649 | } | |
3650 | ||
6de2ae4a L |
3651 | relocation -= htab->elf.sgotplt->output_section->vma |
3652 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 3653 | break; |
d6ab8113 | 3654 | |
70256ad8 AJ |
3655 | case R_X86_64_PLT32: |
3656 | /* Relocation is to the entry for this symbol in the | |
3657 | procedure linkage table. */ | |
3658 | ||
3659 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 3660 | without using the procedure linkage table. */ |
70256ad8 AJ |
3661 | if (h == NULL) |
3662 | break; | |
3663 | ||
c434dee6 | 3664 | if (h->plt.offset == (bfd_vma) -1 |
6de2ae4a | 3665 | || htab->elf.splt == NULL) |
70256ad8 AJ |
3666 | { |
3667 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
3668 | happens when statically linking PIC code, or when |
3669 | using -Bsymbolic. */ | |
70256ad8 AJ |
3670 | break; |
3671 | } | |
3672 | ||
6de2ae4a L |
3673 | relocation = (htab->elf.splt->output_section->vma |
3674 | + htab->elf.splt->output_offset | |
70256ad8 | 3675 | + h->plt.offset); |
b34976b6 | 3676 | unresolved_reloc = FALSE; |
70256ad8 AJ |
3677 | break; |
3678 | ||
1788fc08 L |
3679 | case R_X86_64_SIZE32: |
3680 | case R_X86_64_SIZE64: | |
3681 | if (h | |
3682 | && h->type == STT_TLS | |
3683 | && (h->root.type == bfd_link_hash_defined | |
3684 | || h->root.type == bfd_link_hash_defweak) | |
3685 | && h->root.u.def.section->output_section != NULL | |
3686 | && htab->elf.tls_sec == NULL) | |
3687 | { | |
3688 | (*_bfd_error_handler) | |
3689 | (_("%B: `%s' accessed both as normal and thread local symbol"), | |
3690 | input_bfd, h->root.root.string); | |
3691 | bfd_set_error (bfd_error_bad_value); | |
3692 | return FALSE; | |
3693 | } | |
3694 | ||
3695 | /* Set to symbol size. */ | |
3696 | relocation = st_size; | |
3697 | goto direct; | |
3698 | ||
fd8ab9e5 AJ |
3699 | case R_X86_64_PC8: |
3700 | case R_X86_64_PC16: | |
3701 | case R_X86_64_PC32: | |
6610a52d | 3702 | if (info->shared |
ba3bee0b | 3703 | && (input_section->flags & SEC_ALLOC) != 0 |
90f487df | 3704 | && (input_section->flags & SEC_READONLY) != 0 |
41bed6dd | 3705 | && h != NULL) |
6610a52d | 3706 | { |
41bed6dd L |
3707 | bfd_boolean fail = FALSE; |
3708 | bfd_boolean branch | |
3709 | = (r_type == R_X86_64_PC32 | |
3710 | && is_32bit_relative_branch (contents, rel->r_offset)); | |
3711 | ||
3712 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
3713 | { | |
3714 | /* Symbol is referenced locally. Make sure it is | |
3715 | defined locally or for a branch. */ | |
3716 | fail = !h->def_regular && !branch; | |
3717 | } | |
90f487df | 3718 | else |
41bed6dd L |
3719 | { |
3720 | /* Symbol isn't referenced locally. We only allow | |
3721 | branch to symbol with non-default visibility. */ | |
3722 | fail = (!branch | |
3723 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
3724 | } | |
3725 | ||
3726 | if (fail) | |
3727 | { | |
3728 | const char *fmt; | |
3729 | const char *v; | |
3730 | const char *pic = ""; | |
3731 | ||
3732 | switch (ELF_ST_VISIBILITY (h->other)) | |
3733 | { | |
3734 | case STV_HIDDEN: | |
3735 | v = _("hidden symbol"); | |
3736 | break; | |
3737 | case STV_INTERNAL: | |
3738 | v = _("internal symbol"); | |
3739 | break; | |
3740 | case STV_PROTECTED: | |
3741 | v = _("protected symbol"); | |
3742 | break; | |
3743 | default: | |
3744 | v = _("symbol"); | |
3745 | pic = _("; recompile with -fPIC"); | |
3746 | break; | |
3747 | } | |
3748 | ||
3749 | if (h->def_regular) | |
3750 | fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s"); | |
3751 | else | |
3752 | fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s"); | |
3753 | ||
3754 | (*_bfd_error_handler) (fmt, input_bfd, | |
3755 | x86_64_elf_howto_table[r_type].name, | |
3756 | v, h->root.root.string, pic); | |
3757 | bfd_set_error (bfd_error_bad_value); | |
3758 | return FALSE; | |
3759 | } | |
6610a52d L |
3760 | } |
3761 | /* Fall through. */ | |
3762 | ||
70256ad8 AJ |
3763 | case R_X86_64_8: |
3764 | case R_X86_64_16: | |
3765 | case R_X86_64_32: | |
d6ab8113 | 3766 | case R_X86_64_PC64: |
6b3db546 | 3767 | case R_X86_64_64: |
80643fbc | 3768 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 3769 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 3770 | |
1788fc08 | 3771 | direct: |
b1e24c02 | 3772 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
3773 | break; |
3774 | ||
3775 | if ((info->shared | |
4bc6e03a AJ |
3776 | && (h == NULL |
3777 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3778 | || h->root.type != bfd_link_hash_undefweak) | |
1788fc08 L |
3779 | && ((! IS_X86_64_PCREL_TYPE (r_type) |
3780 | && r_type != R_X86_64_SIZE32 | |
3781 | && r_type != R_X86_64_SIZE64) | |
d8045f23 | 3782 | || ! SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c AJ |
3783 | || (ELIMINATE_COPY_RELOCS |
3784 | && !info->shared | |
c434dee6 AJ |
3785 | && h != NULL |
3786 | && h->dynindx != -1 | |
f5385ebf AM |
3787 | && !h->non_got_ref |
3788 | && ((h->def_dynamic | |
3789 | && !h->def_regular) | |
c434dee6 | 3790 | || h->root.type == bfd_link_hash_undefweak |
0f88be7a | 3791 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
3792 | { |
3793 | Elf_Internal_Rela outrel; | |
b34976b6 | 3794 | bfd_boolean skip, relocate; |
c434dee6 | 3795 | asection *sreloc; |
70256ad8 AJ |
3796 | |
3797 | /* When generating a shared object, these relocations | |
3798 | are copied into the output file to be resolved at run | |
407443a3 | 3799 | time. */ |
b34976b6 AM |
3800 | skip = FALSE; |
3801 | relocate = FALSE; | |
70256ad8 | 3802 | |
c629eae0 JJ |
3803 | outrel.r_offset = |
3804 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 3805 | rel->r_offset); |
c629eae0 | 3806 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 3807 | skip = TRUE; |
0fb19cbc | 3808 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 3809 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
3810 | |
3811 | outrel.r_offset += (input_section->output_section->vma | |
3812 | + input_section->output_offset); | |
3813 | ||
3814 | if (skip) | |
0bb2d96a | 3815 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 3816 | |
fd8ab9e5 AJ |
3817 | /* h->dynindx may be -1 if this symbol was marked to |
3818 | become local. */ | |
3819 | else if (h != NULL | |
c434dee6 | 3820 | && h->dynindx != -1 |
d8045f23 NC |
3821 | && (IS_X86_64_PCREL_TYPE (r_type) |
3822 | || ! info->shared | |
3823 | || ! SYMBOLIC_BIND (info, h) | |
3824 | || ! h->def_regular)) | |
70256ad8 | 3825 | { |
351f65ca | 3826 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 3827 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
3828 | } |
3829 | else | |
3830 | { | |
c434dee6 | 3831 | /* This symbol is local, or marked to become local. */ |
248775ba | 3832 | if (r_type == htab->pointer_r_type) |
607c0e09 | 3833 | { |
b34976b6 | 3834 | relocate = TRUE; |
351f65ca | 3835 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
3836 | outrel.r_addend = relocation + rel->r_addend; |
3837 | } | |
64d25c44 L |
3838 | else if (r_type == R_X86_64_64 |
3839 | && !ABI_64_P (output_bfd)) | |
3840 | { | |
3841 | relocate = TRUE; | |
3842 | outrel.r_info = htab->r_info (0, | |
3843 | R_X86_64_RELATIVE64); | |
3844 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
3845 | /* Check addend overflow. */ |
3846 | if ((outrel.r_addend & 0x80000000) | |
3847 | != (rel->r_addend & 0x80000000)) | |
3848 | { | |
3849 | const char *name; | |
268a8d3a | 3850 | int addend = rel->r_addend; |
8cf0d2dd L |
3851 | if (h && h->root.root.string) |
3852 | name = h->root.root.string; | |
3853 | else | |
3854 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3855 | sym, NULL); | |
6f2c9068 L |
3856 | if (addend < 0) |
3857 | (*_bfd_error_handler) | |
268a8d3a | 3858 | (_("%B: addend -0x%x in relocation %s against " |
6f2c9068 L |
3859 | "symbol `%s' at 0x%lx in section `%A' is " |
3860 | "out of range"), | |
3861 | input_bfd, input_section, addend, | |
3862 | x86_64_elf_howto_table[r_type].name, | |
3863 | name, (unsigned long) rel->r_offset); | |
3864 | else | |
3865 | (*_bfd_error_handler) | |
268a8d3a | 3866 | (_("%B: addend 0x%x in relocation %s against " |
6f2c9068 L |
3867 | "symbol `%s' at 0x%lx in section `%A' is " |
3868 | "out of range"), | |
3869 | input_bfd, input_section, addend, | |
3870 | x86_64_elf_howto_table[r_type].name, | |
3871 | name, (unsigned long) rel->r_offset); | |
8cf0d2dd L |
3872 | bfd_set_error (bfd_error_bad_value); |
3873 | return FALSE; | |
3874 | } | |
64d25c44 | 3875 | } |
607c0e09 AS |
3876 | else |
3877 | { | |
3878 | long sindx; | |
3879 | ||
8517fae7 | 3880 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
3881 | sindx = 0; |
3882 | else if (sec == NULL || sec->owner == NULL) | |
3883 | { | |
3884 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3885 | return FALSE; |
607c0e09 AS |
3886 | } |
3887 | else | |
3888 | { | |
3889 | asection *osec; | |
3890 | ||
74541ad4 AM |
3891 | /* We are turning this relocation into one |
3892 | against a section symbol. It would be | |
3893 | proper to subtract the symbol's value, | |
3894 | osec->vma, from the emitted reloc addend, | |
3895 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
3896 | osec = sec->output_section; |
3897 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
3898 | if (sindx == 0) |
3899 | { | |
3900 | asection *oi = htab->elf.text_index_section; | |
3901 | sindx = elf_section_data (oi)->dynindx; | |
3902 | } | |
3903 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
3904 | } |
3905 | ||
351f65ca | 3906 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
3907 | outrel.r_addend = relocation + rel->r_addend; |
3908 | } | |
70256ad8 AJ |
3909 | } |
3910 | ||
cbe950e9 | 3911 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 3912 | |
62d78908 L |
3913 | if (sreloc == NULL || sreloc->contents == NULL) |
3914 | { | |
3915 | r = bfd_reloc_notsupported; | |
3916 | goto check_relocation_error; | |
3917 | } | |
c434dee6 | 3918 | |
351f65ca | 3919 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
3920 | |
3921 | /* If this reloc is against an external symbol, we do | |
3922 | not want to fiddle with the addend. Otherwise, we | |
3923 | need to include the symbol value so that it becomes | |
3924 | an addend for the dynamic reloc. */ | |
0f88be7a | 3925 | if (! relocate) |
70256ad8 AJ |
3926 | continue; |
3927 | } | |
3928 | ||
3929 | break; | |
3930 | ||
bffbf940 | 3931 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
3932 | case R_X86_64_GOTPC32_TLSDESC: |
3933 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 3934 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
3935 | tls_type = GOT_UNKNOWN; |
3936 | if (h == NULL && local_got_offsets) | |
351f65ca | 3937 | tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 3938 | else if (h != NULL) |
351f65ca | 3939 | tls_type = elf_x86_64_hash_entry (h)->tls_type; |
142411ca | 3940 | |
351f65ca L |
3941 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3942 | input_section, contents, | |
3943 | symtab_hdr, sym_hashes, | |
3944 | &r_type, tls_type, rel, | |
3945 | relend, h, r_symndx)) | |
534a31f6 | 3946 | return FALSE; |
bffbf940 JJ |
3947 | |
3948 | if (r_type == R_X86_64_TPOFF32) | |
3949 | { | |
142411ca L |
3950 | bfd_vma roff = rel->r_offset; |
3951 | ||
bffbf940 | 3952 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 3953 | |
351f65ca | 3954 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 3955 | { |
52bc799a | 3956 | /* GD->LE transition. For 64bit, change |
abcf1d52 | 3957 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
a3fadc9a | 3958 | .word 0x6666; rex64; call __tls_get_addr |
52bc799a | 3959 | into: |
bffbf940 | 3960 | movq %fs:0, %rax |
52bc799a L |
3961 | leaq foo@tpoff(%rax), %rax |
3962 | For 32bit, change | |
3963 | leaq foo@tlsgd(%rip), %rdi | |
3964 | .word 0x6666; rex64; call __tls_get_addr | |
3965 | into: | |
3966 | movl %fs:0, %eax | |
bffbf940 | 3967 | leaq foo@tpoff(%rax), %rax */ |
52bc799a L |
3968 | if (ABI_64_P (output_bfd)) |
3969 | memcpy (contents + roff - 4, | |
3970 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3971 | 16); | |
3972 | else | |
3973 | memcpy (contents + roff - 3, | |
3974 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3975 | 15); | |
eb4ff4d6 | 3976 | bfd_put_32 (output_bfd, |
351f65ca | 3977 | elf_x86_64_tpoff (info, relocation), |
142411ca | 3978 | contents + roff + 8); |
a3fadc9a | 3979 | /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ |
bffbf940 JJ |
3980 | rel++; |
3981 | continue; | |
3982 | } | |
351f65ca | 3983 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
3984 | { |
3985 | /* GDesc -> LE transition. | |
3986 | It's originally something like: | |
3987 | leaq x@tlsdesc(%rip), %rax | |
3988 | ||
3989 | Change it to: | |
c9736ba0 | 3990 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 3991 | |
c9736ba0 | 3992 | unsigned int val, type; |
67a4f2b7 | 3993 | |
67a4f2b7 | 3994 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 3995 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
3996 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
3997 | contents + roff - 3); | |
3998 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
3999 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4000 | contents + roff - 1); | |
eb4ff4d6 | 4001 | bfd_put_32 (output_bfd, |
351f65ca | 4002 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
4003 | contents + roff); |
4004 | continue; | |
4005 | } | |
351f65ca | 4006 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
4007 | { |
4008 | /* GDesc -> LE transition. | |
4009 | It's originally: | |
4010 | call *(%rax) | |
4011 | Turn it into: | |
142411ca | 4012 | xchg %ax,%ax. */ |
10efb593 | 4013 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
4014 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4015 | continue; | |
4016 | } | |
351f65ca | 4017 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 4018 | { |
bffbf940 JJ |
4019 | /* IE->LE transition: |
4020 | Originally it can be one of: | |
4021 | movq foo@gottpoff(%rip), %reg | |
4022 | addq foo@gottpoff(%rip), %reg | |
4023 | We change it into: | |
4024 | movq $foo, %reg | |
4025 | leaq foo(%reg), %reg | |
4026 | addq $foo, %reg. */ | |
142411ca L |
4027 | |
4028 | unsigned int val, type, reg; | |
4029 | ||
4030 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
4031 | type = bfd_get_8 (input_bfd, contents + roff - 2); | |
4032 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 4033 | reg >>= 3; |
bffbf940 JJ |
4034 | if (type == 0x8b) |
4035 | { | |
4036 | /* movq */ | |
4037 | if (val == 0x4c) | |
4038 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 4039 | contents + roff - 3); |
4a4c5f25 L |
4040 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4041 | bfd_put_8 (output_bfd, 0x41, | |
4042 | contents + roff - 3); | |
bffbf940 | 4043 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 4044 | contents + roff - 2); |
bffbf940 | 4045 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 4046 | contents + roff - 1); |
bffbf940 JJ |
4047 | } |
4048 | else if (reg == 4) | |
4049 | { | |
4050 | /* addq -> addq - addressing with %rsp/%r12 is | |
4051 | special */ | |
4052 | if (val == 0x4c) | |
4053 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 4054 | contents + roff - 3); |
4a4c5f25 L |
4055 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4056 | bfd_put_8 (output_bfd, 0x41, | |
4057 | contents + roff - 3); | |
bffbf940 | 4058 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 4059 | contents + roff - 2); |
bffbf940 | 4060 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 4061 | contents + roff - 1); |
bffbf940 JJ |
4062 | } |
4063 | else | |
4064 | { | |
4065 | /* addq -> leaq */ | |
4066 | if (val == 0x4c) | |
4067 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 4068 | contents + roff - 3); |
4a4c5f25 L |
4069 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4070 | bfd_put_8 (output_bfd, 0x45, | |
4071 | contents + roff - 3); | |
bffbf940 | 4072 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 4073 | contents + roff - 2); |
bffbf940 | 4074 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 4075 | contents + roff - 1); |
bffbf940 | 4076 | } |
eb4ff4d6 | 4077 | bfd_put_32 (output_bfd, |
351f65ca | 4078 | elf_x86_64_tpoff (info, relocation), |
142411ca | 4079 | contents + roff); |
bffbf940 JJ |
4080 | continue; |
4081 | } | |
142411ca L |
4082 | else |
4083 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
4084 | } |
4085 | ||
6de2ae4a | 4086 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
4087 | abort (); |
4088 | ||
4089 | if (h != NULL) | |
67a4f2b7 AO |
4090 | { |
4091 | off = h->got.offset; | |
351f65ca | 4092 | offplt = elf_x86_64_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 4093 | } |
bffbf940 JJ |
4094 | else |
4095 | { | |
4096 | if (local_got_offsets == NULL) | |
4097 | abort (); | |
4098 | ||
4099 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 4100 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
4101 | } |
4102 | ||
4103 | if ((off & 1) != 0) | |
4104 | off &= ~1; | |
26e41594 | 4105 | else |
bffbf940 JJ |
4106 | { |
4107 | Elf_Internal_Rela outrel; | |
bffbf940 | 4108 | int dr_type, indx; |
67a4f2b7 | 4109 | asection *sreloc; |
bffbf940 | 4110 | |
6de2ae4a | 4111 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
4112 | abort (); |
4113 | ||
67a4f2b7 AO |
4114 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4115 | ||
4116 | if (GOT_TLS_GDESC_P (tls_type)) | |
4117 | { | |
351f65ca | 4118 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 4119 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
4120 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
4121 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4122 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4123 | + offplt |
4124 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4125 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4126 | if (indx == 0) |
351f65ca | 4127 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
67a4f2b7 AO |
4128 | else |
4129 | outrel.r_addend = 0; | |
351f65ca | 4130 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
4131 | } |
4132 | ||
6de2ae4a | 4133 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4134 | |
6de2ae4a L |
4135 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4136 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 4137 | |
67a4f2b7 | 4138 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 4139 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
4140 | else if (GOT_TLS_GDESC_P (tls_type)) |
4141 | goto dr_done; | |
bffbf940 JJ |
4142 | else |
4143 | dr_type = R_X86_64_TPOFF64; | |
4144 | ||
6de2ae4a | 4145 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 4146 | outrel.r_addend = 0; |
67a4f2b7 AO |
4147 | if ((dr_type == R_X86_64_TPOFF64 |
4148 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
351f65ca L |
4149 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
4150 | outrel.r_info = htab->r_info (indx, dr_type); | |
bffbf940 | 4151 | |
351f65ca | 4152 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 4153 | |
67a4f2b7 | 4154 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
4155 | { |
4156 | if (indx == 0) | |
4157 | { | |
d40d037c | 4158 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 4159 | bfd_put_64 (output_bfd, |
351f65ca | 4160 | relocation - elf_x86_64_dtpoff_base (info), |
6de2ae4a | 4161 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
4162 | } |
4163 | else | |
4164 | { | |
4165 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 4166 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 4167 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
4168 | R_X86_64_DTPOFF64); |
4169 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 4170 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 4171 | &outrel); |
bffbf940 JJ |
4172 | } |
4173 | } | |
4174 | ||
67a4f2b7 | 4175 | dr_done: |
bffbf940 JJ |
4176 | if (h != NULL) |
4177 | h->got.offset |= 1; | |
4178 | else | |
4179 | local_got_offsets[r_symndx] |= 1; | |
4180 | } | |
4181 | ||
67a4f2b7 AO |
4182 | if (off >= (bfd_vma) -2 |
4183 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 4184 | abort (); |
351f65ca | 4185 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 4186 | { |
67a4f2b7 AO |
4187 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
4188 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
4189 | relocation = htab->elf.sgotplt->output_section->vma |
4190 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4191 | + offplt + htab->sgotplt_jump_table_size; |
4192 | else | |
6de2ae4a L |
4193 | relocation = htab->elf.sgot->output_section->vma |
4194 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 4195 | unresolved_reloc = FALSE; |
bffbf940 | 4196 | } |
142411ca | 4197 | else |
67a4f2b7 | 4198 | { |
142411ca | 4199 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 4200 | |
351f65ca | 4201 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 4202 | { |
52bc799a | 4203 | /* GD->IE transition. For 64bit, change |
142411ca L |
4204 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
4205 | .word 0x6666; rex64; call __tls_get_addr@plt | |
52bc799a | 4206 | into: |
142411ca | 4207 | movq %fs:0, %rax |
52bc799a L |
4208 | addq foo@gottpoff(%rip), %rax |
4209 | For 32bit, change | |
4210 | leaq foo@tlsgd(%rip), %rdi | |
4211 | .word 0x6666; rex64; call __tls_get_addr@plt | |
4212 | into: | |
4213 | movl %fs:0, %eax | |
142411ca | 4214 | addq foo@gottpoff(%rip), %rax */ |
52bc799a L |
4215 | if (ABI_64_P (output_bfd)) |
4216 | memcpy (contents + roff - 4, | |
4217 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
4218 | 16); | |
4219 | else | |
4220 | memcpy (contents + roff - 3, | |
4221 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
4222 | 15); | |
142411ca | 4223 | |
6de2ae4a L |
4224 | relocation = (htab->elf.sgot->output_section->vma |
4225 | + htab->elf.sgot->output_offset + off | |
142411ca L |
4226 | - roff |
4227 | - input_section->output_section->vma | |
4228 | - input_section->output_offset | |
4229 | - 12); | |
4230 | bfd_put_32 (output_bfd, relocation, | |
4231 | contents + roff + 8); | |
4232 | /* Skip R_X86_64_PLT32. */ | |
4233 | rel++; | |
4234 | continue; | |
4235 | } | |
351f65ca | 4236 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
4237 | { |
4238 | /* GDesc -> IE transition. | |
4239 | It's originally something like: | |
4240 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 4241 | |
142411ca | 4242 | Change it to: |
c9736ba0 | 4243 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 4244 | |
142411ca L |
4245 | /* Now modify the instruction as appropriate. To |
4246 | turn a leaq into a movq in the form we use it, it | |
4247 | suffices to change the second byte from 0x8d to | |
4248 | 0x8b. */ | |
4249 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
4250 | ||
4251 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4252 | htab->elf.sgot->output_section->vma |
4253 | + htab->elf.sgot->output_offset + off | |
142411ca L |
4254 | - rel->r_offset |
4255 | - input_section->output_section->vma | |
4256 | - input_section->output_offset | |
4257 | - 4, | |
4258 | contents + roff); | |
4259 | continue; | |
4260 | } | |
351f65ca | 4261 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
4262 | { |
4263 | /* GDesc -> IE transition. | |
4264 | It's originally: | |
4265 | call *(%rax) | |
4266 | ||
4267 | Change it to: | |
c9736ba0 | 4268 | xchg %ax, %ax. */ |
142411ca | 4269 | |
142411ca L |
4270 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
4271 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
4272 | continue; | |
4273 | } | |
4274 | else | |
4275 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 4276 | } |
bffbf940 JJ |
4277 | break; |
4278 | ||
4279 | case R_X86_64_TLSLD: | |
351f65ca L |
4280 | if (! elf_x86_64_tls_transition (info, input_bfd, |
4281 | input_section, contents, | |
4282 | symtab_hdr, sym_hashes, | |
4283 | &r_type, GOT_UNKNOWN, | |
4284 | rel, relend, h, r_symndx)) | |
142411ca | 4285 | return FALSE; |
a3fadc9a | 4286 | |
142411ca L |
4287 | if (r_type != R_X86_64_TLSLD) |
4288 | { | |
bffbf940 | 4289 | /* LD->LE transition: |
a3fadc9a | 4290 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr. |
52bc799a L |
4291 | For 64bit, we change it into: |
4292 | .word 0x6666; .byte 0x66; movq %fs:0, %rax. | |
4293 | For 32bit, we change it into: | |
4294 | nopl 0x0(%rax); movl %fs:0, %eax. */ | |
142411ca L |
4295 | |
4296 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
52bc799a L |
4297 | if (ABI_64_P (output_bfd)) |
4298 | memcpy (contents + rel->r_offset - 3, | |
4299 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
4300 | else | |
4301 | memcpy (contents + rel->r_offset - 3, | |
4302 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
a3fadc9a | 4303 | /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ |
bffbf940 JJ |
4304 | rel++; |
4305 | continue; | |
4306 | } | |
4307 | ||
6de2ae4a | 4308 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
4309 | abort (); |
4310 | ||
4311 | off = htab->tls_ld_got.offset; | |
4312 | if (off & 1) | |
4313 | off &= ~1; | |
4314 | else | |
4315 | { | |
4316 | Elf_Internal_Rela outrel; | |
bffbf940 | 4317 | |
6de2ae4a | 4318 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
4319 | abort (); |
4320 | ||
6de2ae4a L |
4321 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4322 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
4323 | |
4324 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 4325 | htab->elf.sgot->contents + off); |
bffbf940 | 4326 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 4327 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 4328 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 4329 | outrel.r_addend = 0; |
351f65ca | 4330 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 4331 | &outrel); |
bffbf940 JJ |
4332 | htab->tls_ld_got.offset |= 1; |
4333 | } | |
6de2ae4a L |
4334 | relocation = htab->elf.sgot->output_section->vma |
4335 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 4336 | unresolved_reloc = FALSE; |
bffbf940 JJ |
4337 | break; |
4338 | ||
4339 | case R_X86_64_DTPOFF32: | |
1d85728f | 4340 | if (!info->executable|| (input_section->flags & SEC_CODE) == 0) |
351f65ca | 4341 | relocation -= elf_x86_64_dtpoff_base (info); |
bffbf940 | 4342 | else |
351f65ca | 4343 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
4344 | break; |
4345 | ||
4346 | case R_X86_64_TPOFF32: | |
6769d501 | 4347 | case R_X86_64_TPOFF64: |
9b769489 | 4348 | BFD_ASSERT (info->executable); |
351f65ca | 4349 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
4350 | break; |
4351 | ||
70256ad8 AJ |
4352 | default: |
4353 | break; | |
4354 | } | |
8d88c4ca | 4355 | |
239e1f3a AM |
4356 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
4357 | because such sections are not SEC_ALLOC and thus ld.so will | |
4358 | not process them. */ | |
c434dee6 | 4359 | if (unresolved_reloc |
239e1f3a | 4360 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
4361 | && h->def_dynamic) |
4362 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
4363 | rel->r_offset) != (bfd_vma) -1) | |
a040981f L |
4364 | { |
4365 | (*_bfd_error_handler) | |
4366 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), | |
4367 | input_bfd, | |
4368 | input_section, | |
4369 | (long) rel->r_offset, | |
4370 | howto->name, | |
4371 | h->root.root.string); | |
4372 | return FALSE; | |
4373 | } | |
c434dee6 | 4374 | |
cbe950e9 | 4375 | do_relocation: |
8d88c4ca | 4376 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
4377 | contents, rel->r_offset, |
4378 | relocation, rel->r_addend); | |
8d88c4ca | 4379 | |
62d78908 | 4380 | check_relocation_error: |
8d88c4ca | 4381 | if (r != bfd_reloc_ok) |
8da6118f | 4382 | { |
c434dee6 AJ |
4383 | const char *name; |
4384 | ||
4385 | if (h != NULL) | |
4386 | name = h->root.root.string; | |
4387 | else | |
8da6118f | 4388 | { |
c434dee6 AJ |
4389 | name = bfd_elf_string_from_elf_section (input_bfd, |
4390 | symtab_hdr->sh_link, | |
4391 | sym->st_name); | |
4392 | if (name == NULL) | |
b34976b6 | 4393 | return FALSE; |
c434dee6 AJ |
4394 | if (*name == '\0') |
4395 | name = bfd_section_name (input_bfd, sec); | |
4396 | } | |
4397 | ||
4398 | if (r == bfd_reloc_overflow) | |
4399 | { | |
c434dee6 | 4400 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
4401 | (info, (h ? &h->root : NULL), name, howto->name, |
4402 | (bfd_vma) 0, input_bfd, input_section, | |
4403 | rel->r_offset))) | |
b34976b6 | 4404 | return FALSE; |
c434dee6 AJ |
4405 | } |
4406 | else | |
4407 | { | |
4408 | (*_bfd_error_handler) | |
bb95161d | 4409 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
d003868e | 4410 | input_bfd, input_section, |
c434dee6 | 4411 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 4412 | return FALSE; |
8da6118f KH |
4413 | } |
4414 | } | |
8d88c4ca | 4415 | } |
70256ad8 | 4416 | |
b34976b6 | 4417 | return TRUE; |
70256ad8 AJ |
4418 | } |
4419 | ||
4420 | /* Finish up dynamic symbol handling. We set the contents of various | |
4421 | dynamic sections here. */ | |
4422 | ||
b34976b6 | 4423 | static bfd_boolean |
351f65ca L |
4424 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
4425 | struct bfd_link_info *info, | |
4426 | struct elf_link_hash_entry *h, | |
220cf809 | 4427 | Elf_Internal_Sym *sym ATTRIBUTE_UNUSED) |
70256ad8 | 4428 | { |
351f65ca | 4429 | struct elf_x86_64_link_hash_table *htab; |
eed180f8 RM |
4430 | const struct elf_x86_64_backend_data *const abed |
4431 | = get_elf_x86_64_backend_data (output_bfd); | |
70256ad8 | 4432 | |
351f65ca | 4433 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4434 | if (htab == NULL) |
4435 | return FALSE; | |
70256ad8 AJ |
4436 | |
4437 | if (h->plt.offset != (bfd_vma) -1) | |
4438 | { | |
70256ad8 AJ |
4439 | bfd_vma plt_index; |
4440 | bfd_vma got_offset; | |
4441 | Elf_Internal_Rela rela; | |
947216bf | 4442 | bfd_byte *loc; |
cbe950e9 | 4443 | asection *plt, *gotplt, *relplt; |
351f65ca | 4444 | const struct elf_backend_data *bed; |
cbe950e9 L |
4445 | |
4446 | /* When building a static executable, use .iplt, .igot.plt and | |
4447 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 4448 | if (htab->elf.splt != NULL) |
cbe950e9 | 4449 | { |
6de2ae4a L |
4450 | plt = htab->elf.splt; |
4451 | gotplt = htab->elf.sgotplt; | |
4452 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
4453 | } |
4454 | else | |
4455 | { | |
6de2ae4a L |
4456 | plt = htab->elf.iplt; |
4457 | gotplt = htab->elf.igotplt; | |
4458 | relplt = htab->elf.irelplt; | |
cbe950e9 | 4459 | } |
70256ad8 AJ |
4460 | |
4461 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 4462 | it up. */ |
cbe950e9 L |
4463 | if ((h->dynindx == -1 |
4464 | && !((h->forced_local || info->executable) | |
4465 | && h->def_regular | |
4466 | && h->type == STT_GNU_IFUNC)) | |
4467 | || plt == NULL | |
4468 | || gotplt == NULL | |
4469 | || relplt == NULL) | |
cec7f46a | 4470 | abort (); |
70256ad8 AJ |
4471 | |
4472 | /* Get the index in the procedure linkage table which | |
4473 | corresponds to this symbol. This is the index of this symbol | |
4474 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 4475 | first entry in the procedure linkage table is reserved. |
6bbec505 | 4476 | |
cbe950e9 | 4477 | Get the offset into the .got table of the entry that |
407443a3 | 4478 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
4479 | bytes. The first three are reserved for the dynamic linker. |
4480 | ||
4481 | For static executables, we don't reserve anything. */ | |
4482 | ||
6de2ae4a | 4483 | if (plt == htab->elf.splt) |
cbe950e9 | 4484 | { |
eed180f8 | 4485 | got_offset = h->plt.offset / abed->plt_entry_size - 1; |
e1f98742 | 4486 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
4487 | } |
4488 | else | |
4489 | { | |
eed180f8 | 4490 | got_offset = h->plt.offset / abed->plt_entry_size; |
e1f98742 | 4491 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 4492 | } |
70256ad8 AJ |
4493 | |
4494 | /* Fill in the entry in the procedure linkage table. */ | |
eed180f8 RM |
4495 | memcpy (plt->contents + h->plt.offset, abed->plt_entry, |
4496 | abed->plt_entry_size); | |
4497 | ||
4498 | /* Insert the relocation positions of the plt section. */ | |
4499 | ||
4500 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
4501 | subtracting the size of that instruction. */ | |
653165cc | 4502 | bfd_put_32 (output_bfd, |
eed180f8 RM |
4503 | (gotplt->output_section->vma |
4504 | + gotplt->output_offset | |
4505 | + got_offset | |
4506 | - plt->output_section->vma | |
4507 | - plt->output_offset | |
4508 | - h->plt.offset | |
4509 | - abed->plt_got_insn_size), | |
4510 | plt->contents + h->plt.offset + abed->plt_got_offset); | |
cbe950e9 | 4511 | |
653165cc | 4512 | /* Fill in the entry in the global offset table, initially this |
eed180f8 | 4513 | points to the second part of the PLT entry. */ |
cbe950e9 L |
4514 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4515 | + plt->output_offset | |
eed180f8 | 4516 | + h->plt.offset + abed->plt_lazy_offset), |
cbe950e9 | 4517 | gotplt->contents + got_offset); |
70256ad8 AJ |
4518 | |
4519 | /* Fill in the entry in the .rela.plt section. */ | |
cbe950e9 L |
4520 | rela.r_offset = (gotplt->output_section->vma |
4521 | + gotplt->output_offset | |
70256ad8 | 4522 | + got_offset); |
cbe950e9 L |
4523 | if (h->dynindx == -1 |
4524 | || ((info->executable | |
4525 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
4526 | && h->def_regular | |
4527 | && h->type == STT_GNU_IFUNC)) | |
4528 | { | |
4529 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
4530 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
351f65ca | 4531 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
cbe950e9 L |
4532 | rela.r_addend = (h->root.u.def.value |
4533 | + h->root.u.def.section->output_section->vma | |
4534 | + h->root.u.def.section->output_offset); | |
e1f98742 L |
4535 | /* R_X86_64_IRELATIVE comes last. */ |
4536 | plt_index = htab->next_irelative_index--; | |
cbe950e9 L |
4537 | } |
4538 | else | |
4539 | { | |
351f65ca | 4540 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); |
cbe950e9 | 4541 | rela.r_addend = 0; |
e1f98742 L |
4542 | plt_index = htab->next_jump_slot_index++; |
4543 | } | |
4544 | ||
4545 | /* Don't fill PLT entry for static executables. */ | |
4546 | if (plt == htab->elf.splt) | |
4547 | { | |
4548 | /* Put relocation index. */ | |
4549 | bfd_put_32 (output_bfd, plt_index, | |
eed180f8 | 4550 | plt->contents + h->plt.offset + abed->plt_reloc_offset); |
e1f98742 | 4551 | /* Put offset for jmp .PLT0. */ |
eed180f8 RM |
4552 | bfd_put_32 (output_bfd, - (h->plt.offset + abed->plt_plt_insn_end), |
4553 | plt->contents + h->plt.offset + abed->plt_plt_offset); | |
cbe950e9 | 4554 | } |
351f65ca L |
4555 | |
4556 | bed = get_elf_backend_data (output_bfd); | |
4557 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
82e96e07 | 4558 | bed->s->swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 | 4559 | |
f5385ebf | 4560 | if (!h->def_regular) |
70256ad8 AJ |
4561 | { |
4562 | /* Mark the symbol as undefined, rather than as defined in | |
47a9f7b3 JJ |
4563 | the .plt section. Leave the value if there were any |
4564 | relocations where pointer equality matters (this is a clue | |
c434dee6 AJ |
4565 | for the dynamic linker, to make function pointer |
4566 | comparisons work between an application and shared | |
47a9f7b3 JJ |
4567 | library), otherwise set it to zero. If a function is only |
4568 | called from a binary, there is no need to slow down | |
4569 | shared libraries because of that. */ | |
70256ad8 | 4570 | sym->st_shndx = SHN_UNDEF; |
f5385ebf | 4571 | if (!h->pointer_equality_needed) |
47a9f7b3 | 4572 | sym->st_value = 0; |
70256ad8 AJ |
4573 | } |
4574 | } | |
4575 | ||
bffbf940 | 4576 | if (h->got.offset != (bfd_vma) -1 |
351f65ca L |
4577 | && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type) |
4578 | && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE) | |
053579d7 | 4579 | { |
053579d7 AJ |
4580 | Elf_Internal_Rela rela; |
4581 | ||
4582 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 4583 | up. */ |
6de2ae4a | 4584 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 4585 | abort (); |
053579d7 | 4586 | |
6de2ae4a L |
4587 | rela.r_offset = (htab->elf.sgot->output_section->vma |
4588 | + htab->elf.sgot->output_offset | |
dc810e39 | 4589 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
4590 | |
4591 | /* If this is a static link, or it is a -Bsymbolic link and the | |
4592 | symbol is defined locally or was forced to be local because | |
4593 | of a version file, we just want to emit a RELATIVE reloc. | |
4594 | The entry in the global offset table will already have been | |
4595 | initialized in the relocate_section function. */ | |
710ab287 | 4596 | if (h->def_regular |
0018b0a3 L |
4597 | && h->type == STT_GNU_IFUNC) |
4598 | { | |
710ab287 L |
4599 | if (info->shared) |
4600 | { | |
4601 | /* Generate R_X86_64_GLOB_DAT. */ | |
4602 | goto do_glob_dat; | |
4603 | } | |
4604 | else | |
4605 | { | |
90d60710 L |
4606 | asection *plt; |
4607 | ||
710ab287 L |
4608 | if (!h->pointer_equality_needed) |
4609 | abort (); | |
4610 | ||
4611 | /* For non-shared object, we can't use .got.plt, which | |
4612 | contains the real function addres if we need pointer | |
4613 | equality. We load the GOT entry with the PLT entry. */ | |
90d60710 | 4614 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
4615 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4616 | + plt->output_offset | |
4617 | + h->plt.offset), | |
6de2ae4a | 4618 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
4619 | return TRUE; |
4620 | } | |
0018b0a3 L |
4621 | } |
4622 | else if (info->shared | |
4623 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
053579d7 | 4624 | { |
41bed6dd L |
4625 | if (!h->def_regular) |
4626 | return FALSE; | |
cc78d0af | 4627 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 4628 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
4629 | rela.r_addend = (h->root.u.def.value |
4630 | + h->root.u.def.section->output_section->vma | |
4631 | + h->root.u.def.section->output_offset); | |
4632 | } | |
4633 | else | |
4634 | { | |
4635 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 4636 | do_glob_dat: |
c434dee6 | 4637 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4638 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 4639 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
4640 | rela.r_addend = 0; |
4641 | } | |
4642 | ||
351f65ca | 4643 | elf_append_rela (output_bfd, htab->elf.srelgot, &rela); |
053579d7 AJ |
4644 | } |
4645 | ||
f5385ebf | 4646 | if (h->needs_copy) |
70256ad8 | 4647 | { |
70256ad8 AJ |
4648 | Elf_Internal_Rela rela; |
4649 | ||
4650 | /* This symbol needs a copy reloc. Set it up. */ | |
4651 | ||
c434dee6 AJ |
4652 | if (h->dynindx == -1 |
4653 | || (h->root.type != bfd_link_hash_defined | |
4654 | && h->root.type != bfd_link_hash_defweak) | |
4655 | || htab->srelbss == NULL) | |
4656 | abort (); | |
70256ad8 AJ |
4657 | |
4658 | rela.r_offset = (h->root.u.def.value | |
4659 | + h->root.u.def.section->output_section->vma | |
4660 | + h->root.u.def.section->output_offset); | |
351f65ca | 4661 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 4662 | rela.r_addend = 0; |
351f65ca | 4663 | elf_append_rela (output_bfd, htab->srelbss, &rela); |
70256ad8 AJ |
4664 | } |
4665 | ||
b34976b6 | 4666 | return TRUE; |
70256ad8 AJ |
4667 | } |
4668 | ||
c25bc9fc L |
4669 | /* Finish up local dynamic symbol handling. We set the contents of |
4670 | various dynamic sections here. */ | |
4671 | ||
4672 | static bfd_boolean | |
351f65ca | 4673 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
4674 | { |
4675 | struct elf_link_hash_entry *h | |
4676 | = (struct elf_link_hash_entry *) *slot; | |
4677 | struct bfd_link_info *info | |
eed180f8 | 4678 | = (struct bfd_link_info *) inf; |
c25bc9fc | 4679 | |
351f65ca | 4680 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
c25bc9fc L |
4681 | info, h, NULL); |
4682 | } | |
4683 | ||
c434dee6 AJ |
4684 | /* Used to decide how to sort relocs in an optimal manner for the |
4685 | dynamic linker, before writing them out. */ | |
4686 | ||
4687 | static enum elf_reloc_type_class | |
351f65ca | 4688 | elf_x86_64_reloc_type_class (const Elf_Internal_Rela *rela) |
c434dee6 | 4689 | { |
351f65ca | 4690 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 AJ |
4691 | { |
4692 | case R_X86_64_RELATIVE: | |
1da80baa | 4693 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
4694 | return reloc_class_relative; |
4695 | case R_X86_64_JUMP_SLOT: | |
4696 | return reloc_class_plt; | |
4697 | case R_X86_64_COPY: | |
4698 | return reloc_class_copy; | |
4699 | default: | |
4700 | return reloc_class_normal; | |
4701 | } | |
4702 | } | |
4703 | ||
70256ad8 AJ |
4704 | /* Finish up the dynamic sections. */ |
4705 | ||
b34976b6 | 4706 | static bfd_boolean |
351f65ca L |
4707 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
4708 | struct bfd_link_info *info) | |
70256ad8 | 4709 | { |
351f65ca | 4710 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
4711 | bfd *dynobj; |
4712 | asection *sdyn; | |
eed180f8 RM |
4713 | const struct elf_x86_64_backend_data *const abed |
4714 | = get_elf_x86_64_backend_data (output_bfd); | |
70256ad8 | 4715 | |
351f65ca | 4716 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4717 | if (htab == NULL) |
4718 | return FALSE; | |
4719 | ||
c434dee6 | 4720 | dynobj = htab->elf.dynobj; |
3d4d4302 | 4721 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
70256ad8 | 4722 | |
c434dee6 | 4723 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 4724 | { |
82e96e07 L |
4725 | bfd_byte *dyncon, *dynconend; |
4726 | const struct elf_backend_data *bed; | |
4727 | bfd_size_type sizeof_dyn; | |
70256ad8 | 4728 | |
6de2ae4a | 4729 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 4730 | abort (); |
70256ad8 | 4731 | |
82e96e07 L |
4732 | bed = get_elf_backend_data (dynobj); |
4733 | sizeof_dyn = bed->s->sizeof_dyn; | |
4734 | dyncon = sdyn->contents; | |
4735 | dynconend = sdyn->contents + sdyn->size; | |
4736 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
4737 | { |
4738 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
4739 | asection *s; |
4740 | ||
82e96e07 | 4741 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
4742 | |
4743 | switch (dyn.d_tag) | |
4744 | { | |
4745 | default: | |
053579d7 | 4746 | continue; |
70256ad8 AJ |
4747 | |
4748 | case DT_PLTGOT: | |
6de2ae4a | 4749 | s = htab->elf.sgotplt; |
8c37241b | 4750 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 4751 | break; |
70256ad8 AJ |
4752 | |
4753 | case DT_JMPREL: | |
6de2ae4a | 4754 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 4755 | break; |
70256ad8 | 4756 | |
c434dee6 | 4757 | case DT_PLTRELSZ: |
6de2ae4a | 4758 | s = htab->elf.srelplt->output_section; |
eea6121a | 4759 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
4760 | break; |
4761 | ||
4762 | case DT_RELASZ: | |
c434dee6 AJ |
4763 | /* The procedure linkage table relocs (DT_JMPREL) should |
4764 | not be included in the overall relocs (DT_RELA). | |
4765 | Therefore, we override the DT_RELASZ entry here to | |
4766 | make it not include the JMPREL relocs. Since the | |
4767 | linker script arranges for .rela.plt to follow all | |
4768 | other relocation sections, we don't have to worry | |
4769 | about changing the DT_RELA entry. */ | |
6de2ae4a | 4770 | if (htab->elf.srelplt != NULL) |
70256ad8 | 4771 | { |
6de2ae4a | 4772 | s = htab->elf.srelplt->output_section; |
eea6121a | 4773 | dyn.d_un.d_val -= s->size; |
70256ad8 AJ |
4774 | } |
4775 | break; | |
67a4f2b7 AO |
4776 | |
4777 | case DT_TLSDESC_PLT: | |
6de2ae4a | 4778 | s = htab->elf.splt; |
67a4f2b7 AO |
4779 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
4780 | + htab->tlsdesc_plt; | |
4781 | break; | |
4782 | ||
4783 | case DT_TLSDESC_GOT: | |
6de2ae4a | 4784 | s = htab->elf.sgot; |
67a4f2b7 AO |
4785 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
4786 | + htab->tlsdesc_got; | |
4787 | break; | |
70256ad8 | 4788 | } |
c434dee6 | 4789 | |
82e96e07 | 4790 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
4791 | } |
4792 | ||
c434dee6 | 4793 | /* Fill in the special first entry in the procedure linkage table. */ |
6de2ae4a | 4794 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 4795 | { |
653165cc | 4796 | /* Fill in the first entry in the procedure linkage table. */ |
eed180f8 RM |
4797 | memcpy (htab->elf.splt->contents, |
4798 | abed->plt0_entry, abed->plt_entry_size); | |
653165cc AJ |
4799 | /* Add offset for pushq GOT+8(%rip), since the instruction |
4800 | uses 6 bytes subtract this value. */ | |
4801 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4802 | (htab->elf.sgotplt->output_section->vma |
4803 | + htab->elf.sgotplt->output_offset | |
653165cc | 4804 | + 8 |
6de2ae4a L |
4805 | - htab->elf.splt->output_section->vma |
4806 | - htab->elf.splt->output_offset | |
653165cc | 4807 | - 6), |
eed180f8 RM |
4808 | htab->elf.splt->contents + abed->plt0_got1_offset); |
4809 | /* Add offset for the PC-relative instruction accessing GOT+16, | |
4810 | subtracting the offset to the end of that instruction. */ | |
653165cc | 4811 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4812 | (htab->elf.sgotplt->output_section->vma |
4813 | + htab->elf.sgotplt->output_offset | |
653165cc | 4814 | + 16 |
6de2ae4a L |
4815 | - htab->elf.splt->output_section->vma |
4816 | - htab->elf.splt->output_offset | |
eed180f8 RM |
4817 | - abed->plt0_got2_insn_end), |
4818 | htab->elf.splt->contents + abed->plt0_got2_offset); | |
653165cc | 4819 | |
eed180f8 RM |
4820 | elf_section_data (htab->elf.splt->output_section) |
4821 | ->this_hdr.sh_entsize = abed->plt_entry_size; | |
67a4f2b7 AO |
4822 | |
4823 | if (htab->tlsdesc_plt) | |
4824 | { | |
4825 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6de2ae4a | 4826 | htab->elf.sgot->contents + htab->tlsdesc_got); |
67a4f2b7 | 4827 | |
6de2ae4a | 4828 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, |
eed180f8 | 4829 | abed->plt0_entry, abed->plt_entry_size); |
67a4f2b7 AO |
4830 | |
4831 | /* Add offset for pushq GOT+8(%rip), since the | |
4832 | instruction uses 6 bytes subtract this value. */ | |
4833 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4834 | (htab->elf.sgotplt->output_section->vma |
4835 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 4836 | + 8 |
6de2ae4a L |
4837 | - htab->elf.splt->output_section->vma |
4838 | - htab->elf.splt->output_offset | |
67a4f2b7 AO |
4839 | - htab->tlsdesc_plt |
4840 | - 6), | |
eed180f8 RM |
4841 | htab->elf.splt->contents |
4842 | + htab->tlsdesc_plt + abed->plt0_got1_offset); | |
4843 | /* Add offset for the PC-relative instruction accessing GOT+TDG, | |
4844 | where TGD stands for htab->tlsdesc_got, subtracting the offset | |
4845 | to the end of that instruction. */ | |
67a4f2b7 | 4846 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4847 | (htab->elf.sgot->output_section->vma |
4848 | + htab->elf.sgot->output_offset | |
67a4f2b7 | 4849 | + htab->tlsdesc_got |
6de2ae4a L |
4850 | - htab->elf.splt->output_section->vma |
4851 | - htab->elf.splt->output_offset | |
67a4f2b7 | 4852 | - htab->tlsdesc_plt |
eed180f8 RM |
4853 | - abed->plt0_got2_insn_end), |
4854 | htab->elf.splt->contents | |
4855 | + htab->tlsdesc_plt + abed->plt0_got2_offset); | |
67a4f2b7 | 4856 | } |
70256ad8 | 4857 | } |
70256ad8 AJ |
4858 | } |
4859 | ||
6de2ae4a | 4860 | if (htab->elf.sgotplt) |
70256ad8 | 4861 | { |
56d4289c L |
4862 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
4863 | { | |
4864 | (*_bfd_error_handler) | |
4865 | (_("discarded output section: `%A'"), htab->elf.sgotplt); | |
4866 | return FALSE; | |
4867 | } | |
4868 | ||
c434dee6 | 4869 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 4870 | if (htab->elf.sgotplt->size > 0) |
c434dee6 AJ |
4871 | { |
4872 | /* Set the first entry in the global offset table to the address of | |
4873 | the dynamic section. */ | |
4874 | if (sdyn == NULL) | |
6de2ae4a | 4875 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); |
c434dee6 AJ |
4876 | else |
4877 | bfd_put_64 (output_bfd, | |
4878 | sdyn->output_section->vma + sdyn->output_offset, | |
6de2ae4a | 4879 | htab->elf.sgotplt->contents); |
c434dee6 | 4880 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
6de2ae4a L |
4881 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); |
4882 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
c434dee6 | 4883 | } |
70256ad8 | 4884 | |
6de2ae4a | 4885 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = |
c434dee6 AJ |
4886 | GOT_ENTRY_SIZE; |
4887 | } | |
70256ad8 | 4888 | |
e41b3a13 | 4889 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
4890 | if (htab->plt_eh_frame != NULL |
4891 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
4892 | { |
4893 | if (htab->elf.splt != NULL | |
4894 | && htab->elf.splt->size != 0 | |
4895 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
4896 | && htab->elf.splt->output_section != NULL | |
4897 | && htab->plt_eh_frame->output_section != NULL) | |
4898 | { | |
4899 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
4900 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
4901 | + htab->plt_eh_frame->output_offset | |
4902 | + PLT_FDE_START_OFFSET; | |
4903 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
4904 | htab->plt_eh_frame->contents | |
4905 | + PLT_FDE_START_OFFSET); | |
4906 | } | |
dbaa2011 | 4907 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
4908 | { |
4909 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
4910 | htab->plt_eh_frame, | |
4911 | htab->plt_eh_frame->contents)) | |
4912 | return FALSE; | |
4913 | } | |
4914 | } | |
4915 | ||
6de2ae4a L |
4916 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
4917 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
4918 | = GOT_ENTRY_SIZE; |
4919 | ||
c25bc9fc L |
4920 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
4921 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 4922 | elf_x86_64_finish_local_dynamic_symbol, |
c25bc9fc L |
4923 | info); |
4924 | ||
b34976b6 | 4925 | return TRUE; |
8d88c4ca NC |
4926 | } |
4927 | ||
4c45e5c9 JJ |
4928 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
4929 | or (bfd_vma) -1 if it should not be included. */ | |
4930 | ||
4931 | static bfd_vma | |
351f65ca L |
4932 | elf_x86_64_plt_sym_val (bfd_vma i, const asection *plt, |
4933 | const arelent *rel ATTRIBUTE_UNUSED) | |
4c45e5c9 | 4934 | { |
eed180f8 | 4935 | return plt->vma + (i + 1) * GET_PLT_ENTRY_SIZE (plt->owner); |
4c45e5c9 | 4936 | } |
8df9fc9d | 4937 | |
d2b2c203 DJ |
4938 | /* Handle an x86-64 specific section when reading an object file. This |
4939 | is called when elfcode.h finds a section with an unknown type. */ | |
4940 | ||
4941 | static bfd_boolean | |
351f65ca | 4942 | elf_x86_64_section_from_shdr (bfd *abfd, |
6dc132d9 L |
4943 | Elf_Internal_Shdr *hdr, |
4944 | const char *name, | |
4945 | int shindex) | |
d2b2c203 DJ |
4946 | { |
4947 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
4948 | return FALSE; | |
4949 | ||
6dc132d9 | 4950 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
4951 | return FALSE; |
4952 | ||
4953 | return TRUE; | |
4954 | } | |
4955 | ||
3b22753a L |
4956 | /* Hook called by the linker routine which adds symbols from an object |
4957 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
4958 | of .bss. */ | |
4959 | ||
4960 | static bfd_boolean | |
351f65ca L |
4961 | elf_x86_64_add_symbol_hook (bfd *abfd, |
4962 | struct bfd_link_info *info, | |
4963 | Elf_Internal_Sym *sym, | |
4964 | const char **namep ATTRIBUTE_UNUSED, | |
4965 | flagword *flagsp ATTRIBUTE_UNUSED, | |
4966 | asection **secp, | |
4967 | bfd_vma *valp) | |
3b22753a L |
4968 | { |
4969 | asection *lcomm; | |
4970 | ||
4971 | switch (sym->st_shndx) | |
4972 | { | |
4973 | case SHN_X86_64_LCOMMON: | |
4974 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
4975 | if (lcomm == NULL) | |
4976 | { | |
4977 | lcomm = bfd_make_section_with_flags (abfd, | |
4978 | "LARGE_COMMON", | |
4979 | (SEC_ALLOC | |
4980 | | SEC_IS_COMMON | |
4981 | | SEC_LINKER_CREATED)); | |
4982 | if (lcomm == NULL) | |
4983 | return FALSE; | |
4984 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
4985 | } | |
4986 | *secp = lcomm; | |
4987 | *valp = sym->st_size; | |
c35bdf6e | 4988 | return TRUE; |
3b22753a | 4989 | } |
d8045f23 | 4990 | |
c16153ae | 4991 | if ((abfd->flags & DYNAMIC) == 0 |
f64b2e8d NC |
4992 | && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
4993 | || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)) | |
4994 | elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE; | |
d8045f23 | 4995 | |
3b22753a L |
4996 | return TRUE; |
4997 | } | |
4998 | ||
4999 | ||
5000 | /* Given a BFD section, try to locate the corresponding ELF section | |
5001 | index. */ | |
5002 | ||
5003 | static bfd_boolean | |
351f65ca L |
5004 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
5005 | asection *sec, int *index_return) | |
3b22753a L |
5006 | { |
5007 | if (sec == &_bfd_elf_large_com_section) | |
5008 | { | |
91d6fa6a | 5009 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
5010 | return TRUE; |
5011 | } | |
5012 | return FALSE; | |
5013 | } | |
5014 | ||
5015 | /* Process a symbol. */ | |
5016 | ||
5017 | static void | |
351f65ca L |
5018 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
5019 | asymbol *asym) | |
3b22753a L |
5020 | { |
5021 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
5022 | ||
5023 | switch (elfsym->internal_elf_sym.st_shndx) | |
5024 | { | |
5025 | case SHN_X86_64_LCOMMON: | |
5026 | asym->section = &_bfd_elf_large_com_section; | |
5027 | asym->value = elfsym->internal_elf_sym.st_size; | |
5028 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
5029 | asym->flags &= ~BSF_GLOBAL; | |
5030 | break; | |
5031 | } | |
5032 | } | |
5033 | ||
5034 | static bfd_boolean | |
351f65ca | 5035 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
5036 | { |
5037 | return (sym->st_shndx == SHN_COMMON | |
5038 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
5039 | } | |
5040 | ||
5041 | static unsigned int | |
351f65ca | 5042 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
5043 | { |
5044 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
5045 | return SHN_COMMON; | |
5046 | else | |
5047 | return SHN_X86_64_LCOMMON; | |
5048 | } | |
5049 | ||
5050 | static asection * | |
351f65ca | 5051 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
5052 | { |
5053 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
5054 | return bfd_com_section_ptr; | |
5055 | else | |
5056 | return &_bfd_elf_large_com_section; | |
5057 | } | |
5058 | ||
5059 | static bfd_boolean | |
351f65ca L |
5060 | elf_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
5061 | struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED, | |
5062 | struct elf_link_hash_entry *h, | |
5063 | Elf_Internal_Sym *sym, | |
5064 | asection **psec, | |
5065 | bfd_vma *pvalue ATTRIBUTE_UNUSED, | |
5066 | unsigned int *pold_alignment ATTRIBUTE_UNUSED, | |
5067 | bfd_boolean *skip ATTRIBUTE_UNUSED, | |
5068 | bfd_boolean *override ATTRIBUTE_UNUSED, | |
5069 | bfd_boolean *type_change_ok ATTRIBUTE_UNUSED, | |
5070 | bfd_boolean *size_change_ok ATTRIBUTE_UNUSED, | |
71e7aa7d L |
5071 | bfd_boolean *newdyn ATTRIBUTE_UNUSED, |
5072 | bfd_boolean *newdef, | |
351f65ca L |
5073 | bfd_boolean *newdyncommon ATTRIBUTE_UNUSED, |
5074 | bfd_boolean *newweak ATTRIBUTE_UNUSED, | |
5075 | bfd *abfd ATTRIBUTE_UNUSED, | |
5076 | asection **sec, | |
71e7aa7d L |
5077 | bfd_boolean *olddyn ATTRIBUTE_UNUSED, |
5078 | bfd_boolean *olddef, | |
351f65ca L |
5079 | bfd_boolean *olddyncommon ATTRIBUTE_UNUSED, |
5080 | bfd_boolean *oldweak ATTRIBUTE_UNUSED, | |
5081 | bfd *oldbfd, | |
5082 | asection **oldsec) | |
3b22753a L |
5083 | { |
5084 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
5085 | normal common symbol. We turn the large common symbol into a |
5086 | normal one. */ | |
71e7aa7d | 5087 | if (!*olddef |
3b22753a | 5088 | && h->root.type == bfd_link_hash_common |
71e7aa7d | 5089 | && !*newdef |
3b22753a | 5090 | && bfd_is_com_section (*sec) |
00492999 | 5091 | && *oldsec != *sec) |
3b22753a | 5092 | { |
00492999 L |
5093 | if (sym->st_shndx == SHN_COMMON |
5094 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0) | |
5095 | { | |
5096 | h->root.u.c.p->section | |
5097 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
5098 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
5099 | } | |
5100 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5101 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0) | |
9a2e389a | 5102 | *psec = *sec = bfd_com_section_ptr; |
3b22753a L |
5103 | } |
5104 | ||
5105 | return TRUE; | |
5106 | } | |
5107 | ||
5108 | static int | |
351f65ca L |
5109 | elf_x86_64_additional_program_headers (bfd *abfd, |
5110 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
5111 | { |
5112 | asection *s; | |
9a2e389a | 5113 | int count = 0; |
3b22753a L |
5114 | |
5115 | /* Check to see if we need a large readonly segment. */ | |
5116 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
5117 | if (s && (s->flags & SEC_LOAD)) | |
5118 | count++; | |
5119 | ||
5120 | /* Check to see if we need a large data segment. Since .lbss sections | |
5121 | is placed right after the .bss section, there should be no need for | |
5122 | a large data segment just because of .lbss. */ | |
5123 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
5124 | if (s && (s->flags & SEC_LOAD)) | |
5125 | count++; | |
5126 | ||
5127 | return count; | |
5128 | } | |
5129 | ||
fdc90cb4 JJ |
5130 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
5131 | ||
5132 | static bfd_boolean | |
351f65ca | 5133 | elf_x86_64_hash_symbol (struct elf_link_hash_entry *h) |
fdc90cb4 JJ |
5134 | { |
5135 | if (h->plt.offset != (bfd_vma) -1 | |
5136 | && !h->def_regular | |
5137 | && !h->pointer_equality_needed) | |
5138 | return FALSE; | |
5139 | ||
5140 | return _bfd_elf_hash_symbol (h); | |
5141 | } | |
5142 | ||
c543bf9a L |
5143 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
5144 | ||
5145 | static bfd_boolean | |
5146 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
5147 | const bfd_target *output) | |
5148 | { | |
5149 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
5150 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
5151 | && _bfd_elf_relocs_compatible (input, output)); | |
5152 | } | |
5153 | ||
9a2e389a | 5154 | static const struct bfd_elf_special_section |
351f65ca | 5155 | elf_x86_64_special_sections[]= |
3b22753a | 5156 | { |
0112cd26 NC |
5157 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
5158 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
5159 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
5160 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
5161 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
5162 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
5163 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
5164 | }; |
5165 | ||
70256ad8 AJ |
5166 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec |
5167 | #define TARGET_LITTLE_NAME "elf64-x86-64" | |
5168 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 5169 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 5170 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 5171 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 5172 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 5173 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
5174 | |
5175 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 5176 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
5177 | #define elf_backend_want_got_plt 1 |
5178 | #define elf_backend_plt_readonly 1 | |
5179 | #define elf_backend_want_plt_sym 0 | |
5180 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 5181 | #define elf_backend_rela_normal 1 |
e41b3a13 | 5182 | #define elf_backend_plt_alignment 4 |
70256ad8 | 5183 | |
351f65ca | 5184 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 5185 | |
70256ad8 | 5186 | #define bfd_elf64_bfd_link_hash_table_create \ |
351f65ca | 5187 | elf_x86_64_link_hash_table_create |
c25bc9fc | 5188 | #define bfd_elf64_bfd_link_hash_table_free \ |
351f65ca L |
5189 | elf_x86_64_link_hash_table_free |
5190 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup | |
157090f7 | 5191 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 5192 | elf_x86_64_reloc_name_lookup |
70256ad8 | 5193 | |
351f65ca | 5194 | #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol |
c543bf9a | 5195 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca L |
5196 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
5197 | #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol | |
5198 | #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections | |
5199 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections | |
5200 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
5201 | #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook | |
5202 | #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook | |
5203 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus | |
5204 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
5205 | #ifdef CORE_HEADER |
5206 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
5207 | #endif | |
351f65ca L |
5208 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
5209 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
5210 | #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections | |
5211 | #define elf_backend_always_size_sections elf_x86_64_always_size_sections | |
74541ad4 | 5212 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
351f65ca | 5213 | #define elf_backend_plt_sym_val elf_x86_64_plt_sym_val |
407443a3 | 5214 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
351f65ca | 5215 | #define bfd_elf64_mkobject elf_x86_64_mkobject |
8d88c4ca | 5216 | |
d2b2c203 | 5217 | #define elf_backend_section_from_shdr \ |
351f65ca | 5218 | elf_x86_64_section_from_shdr |
d2b2c203 | 5219 | |
3b22753a | 5220 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 5221 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 5222 | #define elf_backend_add_symbol_hook \ |
351f65ca | 5223 | elf_x86_64_add_symbol_hook |
3b22753a | 5224 | #define elf_backend_symbol_processing \ |
351f65ca | 5225 | elf_x86_64_symbol_processing |
3b22753a | 5226 | #define elf_backend_common_section_index \ |
351f65ca | 5227 | elf_x86_64_common_section_index |
3b22753a | 5228 | #define elf_backend_common_section \ |
351f65ca | 5229 | elf_x86_64_common_section |
3b22753a | 5230 | #define elf_backend_common_definition \ |
351f65ca | 5231 | elf_x86_64_common_definition |
3b22753a | 5232 | #define elf_backend_merge_symbol \ |
351f65ca | 5233 | elf_x86_64_merge_symbol |
3b22753a | 5234 | #define elf_backend_special_sections \ |
351f65ca | 5235 | elf_x86_64_special_sections |
3b22753a | 5236 | #define elf_backend_additional_program_headers \ |
351f65ca | 5237 | elf_x86_64_additional_program_headers |
fdc90cb4 | 5238 | #define elf_backend_hash_symbol \ |
351f65ca | 5239 | elf_x86_64_hash_symbol |
3b22753a | 5240 | |
d8045f23 NC |
5241 | #define elf_backend_post_process_headers _bfd_elf_set_osabi |
5242 | ||
8d88c4ca | 5243 | #include "elf64-target.h" |
9d7cbccd NC |
5244 | |
5245 | /* FreeBSD support. */ | |
5246 | ||
5247 | #undef TARGET_LITTLE_SYM | |
5248 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec | |
5249 | #undef TARGET_LITTLE_NAME | |
5250 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
5251 | ||
d1036acb L |
5252 | #undef ELF_OSABI |
5253 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 5254 | |
9d7cbccd NC |
5255 | #undef elf64_bed |
5256 | #define elf64_bed elf64_x86_64_fbsd_bed | |
5257 | ||
5258 | #include "elf64-target.h" | |
8a9036a4 | 5259 | |
a6cc6b3b RO |
5260 | /* Solaris 2 support. */ |
5261 | ||
5262 | #undef TARGET_LITTLE_SYM | |
5263 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec | |
5264 | #undef TARGET_LITTLE_NAME | |
5265 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
5266 | ||
5267 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
5268 | objects won't be recognized. */ | |
5269 | #undef ELF_OSABI | |
5270 | ||
5271 | #undef elf64_bed | |
5272 | #define elf64_bed elf64_x86_64_sol2_bed | |
5273 | ||
7dc98aea RO |
5274 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
5275 | boundary. */ | |
5276 | #undef elf_backend_static_tls_alignment | |
5277 | #define elf_backend_static_tls_alignment 16 | |
5278 | ||
a6cc6b3b RO |
5279 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
5280 | ||
5281 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
5282 | File, p.63. */ | |
5283 | #undef elf_backend_want_plt_sym | |
5284 | #define elf_backend_want_plt_sym 1 | |
5285 | ||
5286 | #include "elf64-target.h" | |
5287 | ||
8059fb19 RM |
5288 | /* Native Client support. */ |
5289 | ||
5290 | #undef TARGET_LITTLE_SYM | |
5291 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_nacl_vec | |
5292 | #undef TARGET_LITTLE_NAME | |
5293 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
5294 | #undef elf64_bed | |
5295 | #define elf64_bed elf64_x86_64_nacl_bed | |
5296 | ||
5297 | #undef ELF_MAXPAGESIZE | |
5298 | #undef ELF_MINPAGESIZE | |
5299 | #undef ELF_COMMONPAGESIZE | |
5300 | #define ELF_MAXPAGESIZE 0x10000 | |
5301 | #define ELF_MINPAGESIZE 0x10000 | |
5302 | #define ELF_COMMONPAGESIZE 0x10000 | |
5303 | ||
5304 | /* Restore defaults. */ | |
5305 | #undef ELF_OSABI | |
5306 | #undef elf_backend_static_tls_alignment | |
5307 | #undef elf_backend_want_plt_sym | |
5308 | #define elf_backend_want_plt_sym 0 | |
5309 | ||
5310 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
5311 | ||
5312 | #undef elf_backend_plt_alignment | |
5313 | #define elf_backend_plt_alignment 5 | |
5314 | #define NACL_PLT_ENTRY_SIZE 64 | |
5315 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
5316 | ||
5317 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
5318 | { | |
5319 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
5320 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ | |
5321 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
5322 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5323 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
5324 | ||
ea2d813e RM |
5325 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
5326 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopl %cs:0x0(%rax,%rax,1) */ | |
5327 | ||
5328 | /* 32 bytes of nop to pad out to the standard size. */ | |
8059fb19 RM |
5329 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ |
5330 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
5331 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
5332 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
ea2d813e RM |
5333 | 0x66, /* excess data32 prefix */ |
5334 | 0x90 /* nop */ | |
8059fb19 RM |
5335 | }; |
5336 | ||
5337 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
5338 | { | |
5339 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
5340 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
5341 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5342 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
5343 | ||
5344 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
5345 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
5346 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
5347 | ||
5348 | /* Lazy GOT entries point here (32-byte aligned). */ | |
5349 | 0x68, /* pushq immediate */ | |
5350 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
5351 | 0xe9, /* jmp relative */ | |
5352 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
5353 | ||
5354 | /* 22 bytes of nop to pad out to the standard size. */ | |
5355 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
5356 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
5357 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ | |
5358 | }; | |
5359 | ||
5360 | /* .eh_frame covering the .plt section. */ | |
5361 | ||
5362 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
5363 | { | |
5364 | #if (PLT_CIE_LENGTH != 20 \ | |
5365 | || PLT_FDE_LENGTH != 36 \ | |
5366 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
5367 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
5368 | # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!" | |
5369 | #endif | |
5370 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
5371 | 0, 0, 0, 0, /* CIE ID */ | |
5372 | 1, /* CIE version */ | |
5373 | 'z', 'R', 0, /* Augmentation string */ | |
5374 | 1, /* Code alignment factor */ | |
5375 | 0x78, /* Data alignment factor */ | |
5376 | 16, /* Return address column */ | |
5377 | 1, /* Augmentation size */ | |
5378 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
5379 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
5380 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
5381 | DW_CFA_nop, DW_CFA_nop, | |
5382 | ||
5383 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
5384 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
5385 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
5386 | 0, 0, 0, 0, /* .plt size goes here */ | |
5387 | 0, /* Augmentation size */ | |
5388 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
5389 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
5390 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
5391 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
5392 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
5393 | 13, /* Block length */ | |
5394 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
5395 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
5396 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
5397 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
5398 | DW_CFA_nop, DW_CFA_nop | |
5399 | }; | |
5400 | ||
5401 | static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed = | |
5402 | { | |
5403 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ | |
5404 | elf_x86_64_nacl_plt_entry, /* plt_entry */ | |
5405 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
5406 | 2, /* plt0_got1_offset */ | |
5407 | 9, /* plt0_got2_offset */ | |
5408 | 13, /* plt0_got2_insn_end */ | |
5409 | 3, /* plt_got_offset */ | |
5410 | 33, /* plt_reloc_offset */ | |
5411 | 38, /* plt_plt_offset */ | |
5412 | 7, /* plt_got_insn_size */ | |
5413 | 42, /* plt_plt_insn_end */ | |
5414 | 32, /* plt_lazy_offset */ | |
5415 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ | |
5416 | sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */ | |
5417 | }; | |
5418 | ||
5419 | #undef elf_backend_arch_data | |
5420 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
5421 | ||
5a68afcf RM |
5422 | #undef elf_backend_modify_segment_map |
5423 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
5424 | #undef elf_backend_modify_program_headers | |
5425 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
5426 | ||
8059fb19 RM |
5427 | #include "elf64-target.h" |
5428 | ||
5429 | /* Native Client x32 support. */ | |
5430 | ||
5431 | #undef TARGET_LITTLE_SYM | |
5432 | #define TARGET_LITTLE_SYM bfd_elf32_x86_64_nacl_vec | |
5433 | #undef TARGET_LITTLE_NAME | |
5434 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" | |
5435 | #undef elf32_bed | |
5436 | #define elf32_bed elf32_x86_64_nacl_bed | |
5437 | ||
5438 | #define bfd_elf32_bfd_link_hash_table_create \ | |
5439 | elf_x86_64_link_hash_table_create | |
5440 | #define bfd_elf32_bfd_link_hash_table_free \ | |
5441 | elf_x86_64_link_hash_table_free | |
5442 | #define bfd_elf32_bfd_reloc_type_lookup \ | |
5443 | elf_x86_64_reloc_type_lookup | |
5444 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
5445 | elf_x86_64_reloc_name_lookup | |
5446 | #define bfd_elf32_mkobject \ | |
5447 | elf_x86_64_mkobject | |
5448 | ||
5449 | #undef elf_backend_object_p | |
5450 | #define elf_backend_object_p \ | |
5451 | elf32_x86_64_elf_object_p | |
5452 | ||
5453 | #undef elf_backend_bfd_from_remote_memory | |
5454 | #define elf_backend_bfd_from_remote_memory \ | |
5455 | _bfd_elf32_bfd_from_remote_memory | |
5456 | ||
5457 | #undef elf_backend_size_info | |
5458 | #define elf_backend_size_info \ | |
5459 | _bfd_elf32_size_info | |
5460 | ||
5461 | #include "elf32-target.h" | |
5462 | ||
5463 | /* Restore defaults. */ | |
5a68afcf | 5464 | #undef elf_backend_object_p |
8059fb19 | 5465 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
5466 | #undef elf_backend_bfd_from_remote_memory |
5467 | #undef elf_backend_size_info | |
5468 | #undef elf_backend_modify_segment_map | |
5469 | #undef elf_backend_modify_program_headers | |
8059fb19 | 5470 | |
8a9036a4 L |
5471 | /* Intel L1OM support. */ |
5472 | ||
5473 | static bfd_boolean | |
5474 | elf64_l1om_elf_object_p (bfd *abfd) | |
5475 | { | |
5476 | /* Set the right machine number for an L1OM elf64 file. */ | |
5477 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
5478 | return TRUE; | |
5479 | } | |
5480 | ||
5481 | #undef TARGET_LITTLE_SYM | |
5482 | #define TARGET_LITTLE_SYM bfd_elf64_l1om_vec | |
5483 | #undef TARGET_LITTLE_NAME | |
5484 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
5485 | #undef ELF_ARCH | |
5486 | #define ELF_ARCH bfd_arch_l1om | |
5487 | ||
5488 | #undef ELF_MACHINE_CODE | |
5489 | #define ELF_MACHINE_CODE EM_L1OM | |
5490 | ||
5491 | #undef ELF_OSABI | |
5492 | ||
5493 | #undef elf64_bed | |
5494 | #define elf64_bed elf64_l1om_bed | |
5495 | ||
5496 | #undef elf_backend_object_p | |
5497 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
5498 | ||
8059fb19 RM |
5499 | /* Restore defaults. */ |
5500 | #undef ELF_MAXPAGESIZE | |
5501 | #undef ELF_MINPAGESIZE | |
5502 | #undef ELF_COMMONPAGESIZE | |
5503 | #define ELF_MAXPAGESIZE 0x200000 | |
5504 | #define ELF_MINPAGESIZE 0x1000 | |
5505 | #define ELF_COMMONPAGESIZE 0x1000 | |
5506 | #undef elf_backend_plt_alignment | |
5507 | #define elf_backend_plt_alignment 4 | |
5508 | #undef elf_backend_arch_data | |
5509 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 5510 | |
8a9036a4 L |
5511 | #include "elf64-target.h" |
5512 | ||
5513 | /* FreeBSD L1OM support. */ | |
5514 | ||
5515 | #undef TARGET_LITTLE_SYM | |
5516 | #define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec | |
5517 | #undef TARGET_LITTLE_NAME | |
5518 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
5519 | ||
5520 | #undef ELF_OSABI | |
5521 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5522 | ||
5523 | #undef elf64_bed | |
5524 | #define elf64_bed elf64_l1om_fbsd_bed | |
5525 | ||
8a9036a4 | 5526 | #include "elf64-target.h" |
351f65ca | 5527 | |
7a9068fe L |
5528 | /* Intel K1OM support. */ |
5529 | ||
5530 | static bfd_boolean | |
5531 | elf64_k1om_elf_object_p (bfd *abfd) | |
5532 | { | |
5533 | /* Set the right machine number for an K1OM elf64 file. */ | |
5534 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
5535 | return TRUE; | |
5536 | } | |
5537 | ||
5538 | #undef TARGET_LITTLE_SYM | |
5539 | #define TARGET_LITTLE_SYM bfd_elf64_k1om_vec | |
5540 | #undef TARGET_LITTLE_NAME | |
5541 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
5542 | #undef ELF_ARCH | |
5543 | #define ELF_ARCH bfd_arch_k1om | |
5544 | ||
5545 | #undef ELF_MACHINE_CODE | |
5546 | #define ELF_MACHINE_CODE EM_K1OM | |
5547 | ||
5548 | #undef ELF_OSABI | |
5549 | ||
5550 | #undef elf64_bed | |
5551 | #define elf64_bed elf64_k1om_bed | |
5552 | ||
5553 | #undef elf_backend_object_p | |
5554 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
5555 | ||
5556 | #undef elf_backend_static_tls_alignment | |
5557 | ||
5558 | #undef elf_backend_want_plt_sym | |
5559 | #define elf_backend_want_plt_sym 0 | |
5560 | ||
5561 | #include "elf64-target.h" | |
5562 | ||
5563 | /* FreeBSD K1OM support. */ | |
5564 | ||
5565 | #undef TARGET_LITTLE_SYM | |
5566 | #define TARGET_LITTLE_SYM bfd_elf64_k1om_freebsd_vec | |
5567 | #undef TARGET_LITTLE_NAME | |
5568 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
5569 | ||
5570 | #undef ELF_OSABI | |
5571 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5572 | ||
5573 | #undef elf64_bed | |
5574 | #define elf64_bed elf64_k1om_fbsd_bed | |
5575 | ||
5576 | #include "elf64-target.h" | |
5577 | ||
351f65ca L |
5578 | /* 32bit x86-64 support. */ |
5579 | ||
351f65ca L |
5580 | #undef TARGET_LITTLE_SYM |
5581 | #define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec | |
5582 | #undef TARGET_LITTLE_NAME | |
5583 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 5584 | #undef elf32_bed |
351f65ca L |
5585 | |
5586 | #undef ELF_ARCH | |
5587 | #define ELF_ARCH bfd_arch_i386 | |
5588 | ||
5589 | #undef ELF_MACHINE_CODE | |
5590 | #define ELF_MACHINE_CODE EM_X86_64 | |
5591 | ||
351f65ca L |
5592 | #undef ELF_OSABI |
5593 | ||
351f65ca L |
5594 | #undef elf_backend_object_p |
5595 | #define elf_backend_object_p \ | |
5596 | elf32_x86_64_elf_object_p | |
5597 | ||
5598 | #undef elf_backend_bfd_from_remote_memory | |
5599 | #define elf_backend_bfd_from_remote_memory \ | |
5600 | _bfd_elf32_bfd_from_remote_memory | |
5601 | ||
5602 | #undef elf_backend_size_info | |
5603 | #define elf_backend_size_info \ | |
5604 | _bfd_elf32_size_info | |
5605 | ||
5606 | #include "elf32-target.h" |