Commit | Line | Data |
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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 */ | |
228e534f | 351 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
bcd823f1 L |
352 | |
353 | /* pr_pid */ | |
228e534f | 354 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
bcd823f1 L |
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 */ | |
228e534f | 364 | elf_tdata (abfd)->core->signal |
3bab7989 ML |
365 | = bfd_get_16 (abfd, note->descdata + 12); |
366 | ||
367 | /* pr_pid */ | |
228e534f | 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 | 391 | case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */ |
228e534f | 392 | elf_tdata (abfd)->core->pid |
bcd823f1 | 393 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 394 | elf_tdata (abfd)->core->program |
bcd823f1 | 395 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 396 | elf_tdata (abfd)->core->command |
bcd823f1 L |
397 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
398 | break; | |
399 | ||
3bab7989 | 400 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ |
228e534f | 401 | elf_tdata (abfd)->core->pid |
261b8d08 | 402 | = bfd_get_32 (abfd, note->descdata + 24); |
228e534f | 403 | elf_tdata (abfd)->core->program |
3bab7989 | 404 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
228e534f | 405 | elf_tdata (abfd)->core->command |
3bab7989 ML |
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 | { | |
228e534f | 414 | char *command = elf_tdata (abfd)->core->command; |
3bab7989 ML |
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 | |
7bf52ea2 | 891 | ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (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 | ||
351f65ca L |
904 | if (ABI_64_P (abfd)) |
905 | { | |
906 | ret->r_info = elf64_r_info; | |
907 | ret->r_sym = elf64_r_sym; | |
248775ba | 908 | ret->pointer_r_type = R_X86_64_64; |
351f65ca L |
909 | ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; |
910 | ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; | |
911 | } | |
912 | else | |
913 | { | |
914 | ret->r_info = elf32_r_info; | |
915 | ret->r_sym = elf32_r_sym; | |
248775ba | 916 | ret->pointer_r_type = R_X86_64_32; |
351f65ca L |
917 | ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; |
918 | ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER; | |
919 | } | |
920 | ||
c25bc9fc | 921 | ret->loc_hash_table = htab_try_create (1024, |
351f65ca L |
922 | elf_x86_64_local_htab_hash, |
923 | elf_x86_64_local_htab_eq, | |
c25bc9fc L |
924 | NULL); |
925 | ret->loc_hash_memory = objalloc_create (); | |
926 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
927 | { | |
928 | free (ret); | |
929 | return NULL; | |
930 | } | |
931 | ||
c434dee6 AJ |
932 | return &ret->elf.root; |
933 | } | |
934 | ||
c25bc9fc L |
935 | /* Destroy an X86-64 ELF linker hash table. */ |
936 | ||
937 | static void | |
351f65ca | 938 | elf_x86_64_link_hash_table_free (struct bfd_link_hash_table *hash) |
c25bc9fc | 939 | { |
351f65ca L |
940 | struct elf_x86_64_link_hash_table *htab |
941 | = (struct elf_x86_64_link_hash_table *) hash; | |
c25bc9fc L |
942 | |
943 | if (htab->loc_hash_table) | |
944 | htab_delete (htab->loc_hash_table); | |
945 | if (htab->loc_hash_memory) | |
946 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
9f7c3e5e | 947 | _bfd_elf_link_hash_table_free (hash); |
c25bc9fc L |
948 | } |
949 | ||
c434dee6 AJ |
950 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
951 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
952 | hash table. */ | |
953 | ||
b34976b6 | 954 | static bfd_boolean |
351f65ca L |
955 | elf_x86_64_create_dynamic_sections (bfd *dynobj, |
956 | struct bfd_link_info *info) | |
c434dee6 | 957 | { |
351f65ca | 958 | struct elf_x86_64_link_hash_table *htab; |
c434dee6 | 959 | |
c434dee6 | 960 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 961 | return FALSE; |
c434dee6 | 962 | |
351f65ca | 963 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
964 | if (htab == NULL) |
965 | return FALSE; | |
966 | ||
3d4d4302 | 967 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
c434dee6 | 968 | if (!info->shared) |
3d4d4302 | 969 | htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); |
c434dee6 | 970 | |
6de2ae4a | 971 | if (!htab->sdynbss |
c434dee6 AJ |
972 | || (!info->shared && !htab->srelbss)) |
973 | abort (); | |
974 | ||
e41b3a13 | 975 | if (!info->no_ld_generated_unwind_info |
2fe0fd06 | 976 | && htab->plt_eh_frame == NULL |
e4de50d4 | 977 | && htab->elf.splt != NULL) |
e41b3a13 | 978 | { |
bbf96e4e L |
979 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
980 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
981 | | SEC_LINKER_CREATED); | |
e41b3a13 | 982 | htab->plt_eh_frame |
bbf96e4e | 983 | = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags); |
e41b3a13 JJ |
984 | if (htab->plt_eh_frame == NULL |
985 | || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3)) | |
986 | return FALSE; | |
e41b3a13 | 987 | } |
b34976b6 | 988 | return TRUE; |
c434dee6 AJ |
989 | } |
990 | ||
991 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
992 | ||
993 | static void | |
351f65ca L |
994 | elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
995 | struct elf_link_hash_entry *dir, | |
996 | struct elf_link_hash_entry *ind) | |
c434dee6 | 997 | { |
351f65ca | 998 | struct elf_x86_64_link_hash_entry *edir, *eind; |
c434dee6 | 999 | |
351f65ca L |
1000 | edir = (struct elf_x86_64_link_hash_entry *) dir; |
1001 | eind = (struct elf_x86_64_link_hash_entry *) ind; | |
c434dee6 AJ |
1002 | |
1003 | if (eind->dyn_relocs != NULL) | |
1004 | { | |
1005 | if (edir->dyn_relocs != NULL) | |
1006 | { | |
e03a8ed8 L |
1007 | struct elf_dyn_relocs **pp; |
1008 | struct elf_dyn_relocs *p; | |
c434dee6 | 1009 | |
fcfa13d2 | 1010 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
1011 | list. Merge any entries against the same section. */ |
1012 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1013 | { | |
e03a8ed8 | 1014 | struct elf_dyn_relocs *q; |
c434dee6 AJ |
1015 | |
1016 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1017 | if (q->sec == p->sec) | |
1018 | { | |
1019 | q->pc_count += p->pc_count; | |
1020 | q->count += p->count; | |
1021 | *pp = p->next; | |
1022 | break; | |
1023 | } | |
1024 | if (q == NULL) | |
1025 | pp = &p->next; | |
1026 | } | |
1027 | *pp = edir->dyn_relocs; | |
1028 | } | |
1029 | ||
1030 | edir->dyn_relocs = eind->dyn_relocs; | |
1031 | eind->dyn_relocs = NULL; | |
1032 | } | |
1033 | ||
bffbf940 JJ |
1034 | if (ind->root.type == bfd_link_hash_indirect |
1035 | && dir->got.refcount <= 0) | |
1036 | { | |
1037 | edir->tls_type = eind->tls_type; | |
1038 | eind->tls_type = GOT_UNKNOWN; | |
1039 | } | |
1040 | ||
d40d037c AJ |
1041 | if (ELIMINATE_COPY_RELOCS |
1042 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1043 | && dir->dynamic_adjusted) |
1044 | { | |
1045 | /* If called to transfer flags for a weakdef during processing | |
1046 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1047 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
1048 | dir->ref_dynamic |= ind->ref_dynamic; | |
1049 | dir->ref_regular |= ind->ref_regular; | |
1050 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1051 | dir->needs_plt |= ind->needs_plt; | |
1052 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1053 | } | |
d40d037c | 1054 | else |
fcfa13d2 | 1055 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
8d88c4ca NC |
1056 | } |
1057 | ||
b34976b6 | 1058 | static bfd_boolean |
27482721 | 1059 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 1060 | { |
8d88c4ca NC |
1061 | /* Set the right machine number for an x86-64 elf64 file. */ |
1062 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 1063 | return TRUE; |
8d88c4ca NC |
1064 | } |
1065 | ||
8059fb19 RM |
1066 | static bfd_boolean |
1067 | elf32_x86_64_elf_object_p (bfd *abfd) | |
1068 | { | |
1069 | /* Set the right machine number for an x86-64 elf32 file. */ | |
1070 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
1071 | return TRUE; | |
1072 | } | |
1073 | ||
142411ca L |
1074 | /* Return TRUE if the TLS access code sequence support transition |
1075 | from R_TYPE. */ | |
1076 | ||
1077 | static bfd_boolean | |
351f65ca L |
1078 | elf_x86_64_check_tls_transition (bfd *abfd, |
1079 | struct bfd_link_info *info, | |
1080 | asection *sec, | |
1081 | bfd_byte *contents, | |
1082 | Elf_Internal_Shdr *symtab_hdr, | |
1083 | struct elf_link_hash_entry **sym_hashes, | |
1084 | unsigned int r_type, | |
1085 | const Elf_Internal_Rela *rel, | |
1086 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1087 | { |
142411ca L |
1088 | unsigned int val; |
1089 | unsigned long r_symndx; | |
1090 | struct elf_link_hash_entry *h; | |
1091 | bfd_vma offset; | |
351f65ca | 1092 | struct elf_x86_64_link_hash_table *htab; |
142411ca L |
1093 | |
1094 | /* Get the section contents. */ | |
1095 | if (contents == NULL) | |
1096 | { | |
1097 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1098 | contents = elf_section_data (sec)->this_hdr.contents; | |
1099 | else | |
1100 | { | |
1101 | /* FIXME: How to better handle error condition? */ | |
1102 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1103 | return FALSE; | |
bffbf940 | 1104 | |
142411ca L |
1105 | /* Cache the section contents for elf_link_input_bfd. */ |
1106 | elf_section_data (sec)->this_hdr.contents = contents; | |
1107 | } | |
1108 | } | |
1109 | ||
351f65ca | 1110 | htab = elf_x86_64_hash_table (info); |
142411ca | 1111 | offset = rel->r_offset; |
bffbf940 | 1112 | switch (r_type) |
142411ca L |
1113 | { |
1114 | case R_X86_64_TLSGD: | |
1115 | case R_X86_64_TLSLD: | |
1116 | if ((rel + 1) >= relend) | |
1117 | return FALSE; | |
1118 | ||
1119 | if (r_type == R_X86_64_TLSGD) | |
1120 | { | |
52bc799a | 1121 | /* Check transition from GD access model. For 64bit, only |
142411ca L |
1122 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
1123 | .word 0x6666; rex64; call __tls_get_addr | |
52bc799a L |
1124 | can transit to different access model. For 32bit, only |
1125 | leaq foo@tlsgd(%rip), %rdi | |
1126 | .word 0x6666; rex64; call __tls_get_addr | |
142411ca L |
1127 | can transit to different access model. */ |
1128 | ||
fa289a5f AM |
1129 | static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 }; |
1130 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; | |
1131 | ||
52bc799a | 1132 | if ((offset + 12) > sec->size |
fa289a5f | 1133 | || memcmp (contents + offset + 4, call, 4) != 0) |
142411ca | 1134 | return FALSE; |
52bc799a L |
1135 | |
1136 | if (ABI_64_P (abfd)) | |
1137 | { | |
52bc799a | 1138 | if (offset < 4 |
fa289a5f | 1139 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1140 | return FALSE; |
1141 | } | |
1142 | else | |
1143 | { | |
52bc799a | 1144 | if (offset < 3 |
fa289a5f | 1145 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1146 | return FALSE; |
1147 | } | |
142411ca L |
1148 | } |
1149 | else | |
1150 | { | |
1151 | /* Check transition from LD access model. Only | |
1152 | leaq foo@tlsld(%rip), %rdi; | |
1153 | call __tls_get_addr | |
1154 | can transit to different access model. */ | |
1155 | ||
fa289a5f | 1156 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1157 | |
1158 | if (offset < 3 || (offset + 9) > sec->size) | |
1159 | return FALSE; | |
1160 | ||
fa289a5f AM |
1161 | if (memcmp (contents + offset - 3, lea, 3) != 0 |
1162 | || 0xe8 != *(contents + offset + 4)) | |
142411ca L |
1163 | return FALSE; |
1164 | } | |
1165 | ||
351f65ca | 1166 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1167 | if (r_symndx < symtab_hdr->sh_info) |
1168 | return FALSE; | |
1169 | ||
1170 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
c4fb387b | 1171 | /* Use strncmp to check __tls_get_addr since __tls_get_addr |
eed180f8 | 1172 | may be versioned. */ |
142411ca L |
1173 | return (h != NULL |
1174 | && h->root.root.string != NULL | |
351f65ca L |
1175 | && (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32 |
1176 | || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32) | |
c4fb387b L |
1177 | && (strncmp (h->root.root.string, |
1178 | "__tls_get_addr", 14) == 0)); | |
142411ca L |
1179 | |
1180 | case R_X86_64_GOTTPOFF: | |
1181 | /* Check transition from IE access model: | |
4a4c5f25 L |
1182 | mov foo@gottpoff(%rip), %reg |
1183 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1184 | */ |
1185 | ||
4a4c5f25 L |
1186 | /* Check REX prefix first. */ |
1187 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1188 | { | |
1189 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1190 | if (val != 0x48 && val != 0x4c) | |
1191 | { | |
1192 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1193 | if (ABI_64_P (abfd)) | |
1194 | return FALSE; | |
1195 | } | |
1196 | } | |
1197 | else | |
1198 | { | |
1199 | /* X32 may not have any REX prefix. */ | |
1200 | if (ABI_64_P (abfd)) | |
1201 | return FALSE; | |
1202 | if (offset < 2 || (offset + 3) > sec->size) | |
1203 | return FALSE; | |
1204 | } | |
142411ca L |
1205 | |
1206 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1207 | if (val != 0x8b && val != 0x03) | |
1208 | return FALSE; | |
1209 | ||
1210 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1211 | return (val & 0xc7) == 5; | |
1212 | ||
1213 | case R_X86_64_GOTPC32_TLSDESC: | |
1214 | /* Check transition from GDesc access model: | |
1215 | leaq x@tlsdesc(%rip), %rax | |
1216 | ||
1217 | Make sure it's a leaq adding rip to a 32-bit offset | |
1218 | into any register, although it's probably almost always | |
1219 | going to be rax. */ | |
1220 | ||
1221 | if (offset < 3 || (offset + 4) > sec->size) | |
1222 | return FALSE; | |
1223 | ||
1224 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1225 | if ((val & 0xfb) != 0x48) | |
1226 | return FALSE; | |
1227 | ||
1228 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1229 | return FALSE; | |
1230 | ||
1231 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1232 | return (val & 0xc7) == 0x05; | |
1233 | ||
1234 | case R_X86_64_TLSDESC_CALL: | |
1235 | /* Check transition from GDesc access model: | |
1236 | call *x@tlsdesc(%rax) | |
1237 | */ | |
1238 | if (offset + 2 <= sec->size) | |
1239 | { | |
1240 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
fa289a5f AM |
1241 | static const unsigned char call[] = { 0xff, 0x10 }; |
1242 | return memcmp (contents + offset, call, 2) == 0; | |
142411ca L |
1243 | } |
1244 | ||
1245 | return FALSE; | |
1246 | ||
1247 | default: | |
1248 | abort (); | |
1249 | } | |
1250 | } | |
1251 | ||
1252 | /* Return TRUE if the TLS access transition is OK or no transition | |
1253 | will be performed. Update R_TYPE if there is a transition. */ | |
1254 | ||
1255 | static bfd_boolean | |
351f65ca L |
1256 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1257 | asection *sec, bfd_byte *contents, | |
1258 | Elf_Internal_Shdr *symtab_hdr, | |
1259 | struct elf_link_hash_entry **sym_hashes, | |
1260 | unsigned int *r_type, int tls_type, | |
1261 | const Elf_Internal_Rela *rel, | |
1262 | const Elf_Internal_Rela *relend, | |
1263 | struct elf_link_hash_entry *h, | |
1264 | unsigned long r_symndx) | |
142411ca L |
1265 | { |
1266 | unsigned int from_type = *r_type; | |
1267 | unsigned int to_type = from_type; | |
1268 | bfd_boolean check = TRUE; | |
1269 | ||
bb1cb422 L |
1270 | /* Skip TLS transition for functions. */ |
1271 | if (h != NULL | |
1272 | && (h->type == STT_FUNC | |
1273 | || h->type == STT_GNU_IFUNC)) | |
1274 | return TRUE; | |
1275 | ||
142411ca | 1276 | switch (from_type) |
bffbf940 JJ |
1277 | { |
1278 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1279 | case R_X86_64_GOTPC32_TLSDESC: |
1280 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1281 | case R_X86_64_GOTTPOFF: |
1d85728f | 1282 | if (info->executable) |
142411ca L |
1283 | { |
1284 | if (h == NULL) | |
1285 | to_type = R_X86_64_TPOFF32; | |
1286 | else | |
1287 | to_type = R_X86_64_GOTTPOFF; | |
1288 | } | |
1289 | ||
351f65ca | 1290 | /* When we are called from elf_x86_64_relocate_section, |
142411ca L |
1291 | CONTENTS isn't NULL and there may be additional transitions |
1292 | based on TLS_TYPE. */ | |
1293 | if (contents != NULL) | |
1294 | { | |
1295 | unsigned int new_to_type = to_type; | |
1296 | ||
1d85728f | 1297 | if (info->executable |
142411ca L |
1298 | && h != NULL |
1299 | && h->dynindx == -1 | |
1300 | && tls_type == GOT_TLS_IE) | |
1301 | new_to_type = R_X86_64_TPOFF32; | |
1302 | ||
1303 | if (to_type == R_X86_64_TLSGD | |
1304 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1305 | || to_type == R_X86_64_TLSDESC_CALL) | |
1306 | { | |
1307 | if (tls_type == GOT_TLS_IE) | |
1308 | new_to_type = R_X86_64_GOTTPOFF; | |
1309 | } | |
1310 | ||
1311 | /* We checked the transition before when we were called from | |
351f65ca | 1312 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1313 | transition which hasn't been checked before. */ |
1314 | check = new_to_type != to_type && from_type == to_type; | |
1315 | to_type = new_to_type; | |
1316 | } | |
1317 | ||
1318 | break; | |
1319 | ||
bffbf940 | 1320 | case R_X86_64_TLSLD: |
1d85728f | 1321 | if (info->executable) |
142411ca L |
1322 | to_type = R_X86_64_TPOFF32; |
1323 | break; | |
1324 | ||
1325 | default: | |
1326 | return TRUE; | |
bffbf940 JJ |
1327 | } |
1328 | ||
142411ca L |
1329 | /* Return TRUE if there is no transition. */ |
1330 | if (from_type == to_type) | |
1331 | return TRUE; | |
1332 | ||
1333 | /* Check if the transition can be performed. */ | |
1334 | if (check | |
351f65ca L |
1335 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1336 | symtab_hdr, sym_hashes, | |
1337 | from_type, rel, relend)) | |
142411ca | 1338 | { |
2f629d23 | 1339 | reloc_howto_type *from, *to; |
4c544807 | 1340 | const char *name; |
142411ca | 1341 | |
351f65ca L |
1342 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1343 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1344 | |
4c544807 L |
1345 | if (h) |
1346 | name = h->root.root.string; | |
1347 | else | |
1348 | { | |
351f65ca | 1349 | struct elf_x86_64_link_hash_table *htab; |
4dfe6ac6 | 1350 | |
351f65ca | 1351 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1352 | if (htab == NULL) |
1353 | name = "*unknown*"; | |
1354 | else | |
1355 | { | |
1356 | Elf_Internal_Sym *isym; | |
1357 | ||
1358 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1359 | abfd, r_symndx); | |
1360 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1361 | } | |
4c544807 L |
1362 | } |
1363 | ||
142411ca L |
1364 | (*_bfd_error_handler) |
1365 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1366 | "in section `%A' failed"), | |
4c544807 | 1367 | abfd, sec, from->name, to->name, name, |
142411ca L |
1368 | (unsigned long) rel->r_offset); |
1369 | bfd_set_error (bfd_error_bad_value); | |
1370 | return FALSE; | |
1371 | } | |
1372 | ||
1373 | *r_type = to_type; | |
1374 | return TRUE; | |
bffbf940 JJ |
1375 | } |
1376 | ||
70256ad8 | 1377 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1378 | calculate needed space in the global offset table, procedure |
1379 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1380 | |
b34976b6 | 1381 | static bfd_boolean |
351f65ca L |
1382 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1383 | asection *sec, | |
1384 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1385 | { |
351f65ca | 1386 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1387 | Elf_Internal_Shdr *symtab_hdr; |
1388 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1389 | const Elf_Internal_Rela *rel; |
1390 | const Elf_Internal_Rela *rel_end; | |
70256ad8 AJ |
1391 | asection *sreloc; |
1392 | ||
1049f94e | 1393 | if (info->relocatable) |
b34976b6 | 1394 | return TRUE; |
70256ad8 | 1395 | |
0ffa91dd NC |
1396 | BFD_ASSERT (is_x86_64_elf (abfd)); |
1397 | ||
351f65ca | 1398 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1399 | if (htab == NULL) |
1400 | return FALSE; | |
1401 | ||
0ffa91dd | 1402 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1403 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1404 | |
c434dee6 | 1405 | sreloc = NULL; |
cbe950e9 | 1406 | |
70256ad8 AJ |
1407 | rel_end = relocs + sec->reloc_count; |
1408 | for (rel = relocs; rel < rel_end; rel++) | |
1409 | { | |
bffbf940 | 1410 | unsigned int r_type; |
70256ad8 AJ |
1411 | unsigned long r_symndx; |
1412 | struct elf_link_hash_entry *h; | |
4c544807 L |
1413 | Elf_Internal_Sym *isym; |
1414 | const char *name; | |
06a6a421 | 1415 | bfd_boolean size_reloc; |
70256ad8 | 1416 | |
351f65ca L |
1417 | r_symndx = htab->r_sym (rel->r_info); |
1418 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1419 | |
1420 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1421 | { | |
d003868e AM |
1422 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1423 | abfd, r_symndx); | |
b34976b6 | 1424 | return FALSE; |
c434dee6 AJ |
1425 | } |
1426 | ||
70256ad8 | 1427 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1428 | { |
1429 | /* A local symbol. */ | |
c2e61a4e L |
1430 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1431 | abfd, r_symndx); | |
1432 | if (isym == NULL) | |
1433 | return FALSE; | |
c25bc9fc L |
1434 | |
1435 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1436 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1437 | { |
351f65ca L |
1438 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, |
1439 | TRUE); | |
c25bc9fc | 1440 | if (h == NULL) |
c2e61a4e | 1441 | return FALSE; |
6bbec505 | 1442 | |
c25bc9fc L |
1443 | /* Fake a STT_GNU_IFUNC symbol. */ |
1444 | h->type = STT_GNU_IFUNC; | |
1445 | h->def_regular = 1; | |
1446 | h->ref_regular = 1; | |
1447 | h->forced_local = 1; | |
1448 | h->root.type = bfd_link_hash_defined; | |
1449 | } | |
1450 | else | |
1451 | h = NULL; | |
1452 | } | |
70256ad8 | 1453 | else |
71cb9464 | 1454 | { |
4c544807 | 1455 | isym = NULL; |
71cb9464 L |
1456 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1457 | while (h->root.type == bfd_link_hash_indirect | |
1458 | || h->root.type == bfd_link_hash_warning) | |
1459 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1460 | } |
cbe950e9 | 1461 | |
d1534d16 L |
1462 | /* Check invalid x32 relocations. */ |
1463 | if (!ABI_64_P (abfd)) | |
1464 | switch (r_type) | |
1465 | { | |
1466 | default: | |
1467 | break; | |
1468 | ||
d1534d16 L |
1469 | case R_X86_64_DTPOFF64: |
1470 | case R_X86_64_TPOFF64: | |
1471 | case R_X86_64_PC64: | |
1472 | case R_X86_64_GOTOFF64: | |
1473 | case R_X86_64_GOT64: | |
1474 | case R_X86_64_GOTPCREL64: | |
1475 | case R_X86_64_GOTPC64: | |
1476 | case R_X86_64_GOTPLT64: | |
1477 | case R_X86_64_PLTOFF64: | |
1478 | { | |
1479 | if (h) | |
1480 | name = h->root.root.string; | |
1481 | else | |
1482 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1483 | NULL); | |
1484 | (*_bfd_error_handler) | |
1485 | (_("%B: relocation %s against symbol `%s' isn't " | |
1486 | "supported in x32 mode"), abfd, | |
1487 | x86_64_elf_howto_table[r_type].name, name); | |
1488 | bfd_set_error (bfd_error_bad_value); | |
1489 | return FALSE; | |
1490 | } | |
1491 | break; | |
1492 | } | |
1493 | ||
c25bc9fc L |
1494 | if (h != NULL) |
1495 | { | |
cbe950e9 L |
1496 | /* Create the ifunc sections for static executables. If we |
1497 | never see an indirect function symbol nor we are building | |
1498 | a static executable, those sections will be empty and | |
1499 | won't appear in output. */ | |
1500 | switch (r_type) | |
1501 | { | |
1502 | default: | |
1503 | break; | |
1504 | ||
1505 | case R_X86_64_32S: | |
1506 | case R_X86_64_32: | |
1507 | case R_X86_64_64: | |
1508 | case R_X86_64_PC32: | |
1509 | case R_X86_64_PC64: | |
1510 | case R_X86_64_PLT32: | |
1511 | case R_X86_64_GOTPCREL: | |
1512 | case R_X86_64_GOTPCREL64: | |
9d4057ee AM |
1513 | if (htab->elf.dynobj == NULL) |
1514 | htab->elf.dynobj = abfd; | |
1515 | if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) | |
c2e61a4e | 1516 | return FALSE; |
cbe950e9 L |
1517 | break; |
1518 | } | |
1519 | ||
ad1e85de L |
1520 | /* It is referenced by a non-shared object. */ |
1521 | h->ref_regular = 1; | |
71cb9464 | 1522 | } |
70256ad8 | 1523 | |
351f65ca L |
1524 | if (! elf_x86_64_tls_transition (info, abfd, sec, NULL, |
1525 | symtab_hdr, sym_hashes, | |
1526 | &r_type, GOT_UNKNOWN, | |
1527 | rel, rel_end, h, r_symndx)) | |
c2e61a4e | 1528 | return FALSE; |
142411ca | 1529 | |
bffbf940 | 1530 | switch (r_type) |
70256ad8 | 1531 | { |
bffbf940 JJ |
1532 | case R_X86_64_TLSLD: |
1533 | htab->tls_ld_got.refcount += 1; | |
1534 | goto create_got; | |
1535 | ||
1536 | case R_X86_64_TPOFF32: | |
351f65ca | 1537 | if (!info->executable && ABI_64_P (abfd)) |
70256ad8 | 1538 | { |
09a24cbf | 1539 | if (h) |
4c544807 L |
1540 | name = h->root.root.string; |
1541 | else | |
1542 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1543 | NULL); | |
bffbf940 | 1544 | (*_bfd_error_handler) |
d003868e AM |
1545 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
1546 | abfd, | |
4c544807 | 1547 | x86_64_elf_howto_table[r_type].name, name); |
bffbf940 | 1548 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1549 | return FALSE; |
70256ad8 | 1550 | } |
bffbf940 | 1551 | break; |
c434dee6 | 1552 | |
bffbf940 | 1553 | case R_X86_64_GOTTPOFF: |
1d85728f | 1554 | if (!info->executable) |
bffbf940 JJ |
1555 | info->flags |= DF_STATIC_TLS; |
1556 | /* Fall through */ | |
70256ad8 | 1557 | |
bffbf940 JJ |
1558 | case R_X86_64_GOT32: |
1559 | case R_X86_64_GOTPCREL: | |
1560 | case R_X86_64_TLSGD: | |
7b81dfbb AJ |
1561 | case R_X86_64_GOT64: |
1562 | case R_X86_64_GOTPCREL64: | |
1563 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
1564 | case R_X86_64_GOTPC32_TLSDESC: |
1565 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
1566 | /* This symbol requires a global offset table entry. */ |
1567 | { | |
1568 | int tls_type, old_tls_type; | |
1569 | ||
1570 | switch (r_type) | |
1571 | { | |
1572 | default: tls_type = GOT_NORMAL; break; | |
1573 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
1574 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
1575 | case R_X86_64_GOTPC32_TLSDESC: |
1576 | case R_X86_64_TLSDESC_CALL: | |
1577 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
1578 | } |
1579 | ||
1580 | if (h != NULL) | |
1581 | { | |
7b81dfbb AJ |
1582 | if (r_type == R_X86_64_GOTPLT64) |
1583 | { | |
1584 | /* This relocation indicates that we also need | |
1585 | a PLT entry, as this is a function. We don't need | |
1586 | a PLT entry for local symbols. */ | |
1587 | h->needs_plt = 1; | |
1588 | h->plt.refcount += 1; | |
1589 | } | |
bffbf940 | 1590 | h->got.refcount += 1; |
351f65ca | 1591 | old_tls_type = elf_x86_64_hash_entry (h)->tls_type; |
bffbf940 JJ |
1592 | } |
1593 | else | |
1594 | { | |
1595 | bfd_signed_vma *local_got_refcounts; | |
1596 | ||
1597 | /* This is a global offset table entry for a local symbol. */ | |
1598 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1599 | if (local_got_refcounts == NULL) | |
1600 | { | |
1601 | bfd_size_type size; | |
1602 | ||
1603 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1604 | size *= sizeof (bfd_signed_vma) |
1605 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
1606 | local_got_refcounts = ((bfd_signed_vma *) |
1607 | bfd_zalloc (abfd, size)); | |
1608 | if (local_got_refcounts == NULL) | |
c2e61a4e | 1609 | return FALSE; |
bffbf940 | 1610 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
351f65ca | 1611 | elf_x86_64_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 1612 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
351f65ca | 1613 | elf_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 1614 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
1615 | } |
1616 | local_got_refcounts[r_symndx] += 1; | |
1617 | old_tls_type | |
351f65ca | 1618 | = elf_x86_64_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
1619 | } |
1620 | ||
1621 | /* If a TLS symbol is accessed using IE at least once, | |
1622 | there is no point to use dynamic model for it. */ | |
1623 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
1624 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
1625 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 1626 | { |
67a4f2b7 | 1627 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 1628 | tls_type = old_tls_type; |
67a4f2b7 AO |
1629 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1630 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1631 | tls_type |= old_tls_type; | |
bffbf940 JJ |
1632 | else |
1633 | { | |
09a24cbf | 1634 | if (h) |
4c544807 L |
1635 | name = h->root.root.string; |
1636 | else | |
1637 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
1638 | isym, NULL); | |
bffbf940 | 1639 | (*_bfd_error_handler) |
1f7a4e42 | 1640 | (_("%B: '%s' accessed both as normal and thread local symbol"), |
4c544807 | 1641 | abfd, name); |
68c4a57e | 1642 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1643 | return FALSE; |
bffbf940 JJ |
1644 | } |
1645 | } | |
1646 | ||
1647 | if (old_tls_type != tls_type) | |
1648 | { | |
1649 | if (h != NULL) | |
351f65ca | 1650 | elf_x86_64_hash_entry (h)->tls_type = tls_type; |
bffbf940 | 1651 | else |
351f65ca | 1652 | elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
1653 | } |
1654 | } | |
c434dee6 AJ |
1655 | /* Fall through */ |
1656 | ||
d6ab8113 JB |
1657 | case R_X86_64_GOTOFF64: |
1658 | case R_X86_64_GOTPC32: | |
7b81dfbb | 1659 | case R_X86_64_GOTPC64: |
bffbf940 | 1660 | create_got: |
6de2ae4a | 1661 | if (htab->elf.sgot == NULL) |
c434dee6 AJ |
1662 | { |
1663 | if (htab->elf.dynobj == NULL) | |
1664 | htab->elf.dynobj = abfd; | |
6de2ae4a L |
1665 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, |
1666 | info)) | |
c2e61a4e | 1667 | return FALSE; |
c434dee6 | 1668 | } |
70256ad8 AJ |
1669 | break; |
1670 | ||
1671 | case R_X86_64_PLT32: | |
1672 | /* This symbol requires a procedure linkage table entry. We | |
407443a3 AJ |
1673 | actually build the entry in adjust_dynamic_symbol, |
1674 | because this might be a case of linking PIC code which is | |
1675 | never referenced by a dynamic object, in which case we | |
1676 | don't need to generate a procedure linkage table entry | |
1677 | after all. */ | |
70256ad8 AJ |
1678 | |
1679 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 1680 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
1681 | if (h == NULL) |
1682 | continue; | |
1683 | ||
f5385ebf | 1684 | h->needs_plt = 1; |
51b64d56 | 1685 | h->plt.refcount += 1; |
70256ad8 AJ |
1686 | break; |
1687 | ||
7b81dfbb AJ |
1688 | case R_X86_64_PLTOFF64: |
1689 | /* This tries to form the 'address' of a function relative | |
1690 | to GOT. For global symbols we need a PLT entry. */ | |
1691 | if (h != NULL) | |
1692 | { | |
1693 | h->needs_plt = 1; | |
1694 | h->plt.refcount += 1; | |
1695 | } | |
1696 | goto create_got; | |
1697 | ||
6a3e1bae L |
1698 | case R_X86_64_SIZE32: |
1699 | case R_X86_64_SIZE64: | |
06a6a421 | 1700 | size_reloc = TRUE; |
6a3e1bae L |
1701 | goto do_size; |
1702 | ||
248775ba L |
1703 | case R_X86_64_32: |
1704 | if (!ABI_64_P (abfd)) | |
1705 | goto pointer; | |
cc78d0af AJ |
1706 | case R_X86_64_8: |
1707 | case R_X86_64_16: | |
70256ad8 | 1708 | case R_X86_64_32S: |
1b71fb54 AJ |
1709 | /* Let's help debug shared library creation. These relocs |
1710 | cannot be used in shared libs. Don't error out for | |
1711 | sections we don't care about, such as debug sections or | |
1712 | non-constant sections. */ | |
1713 | if (info->shared | |
1714 | && (sec->flags & SEC_ALLOC) != 0 | |
1715 | && (sec->flags & SEC_READONLY) != 0) | |
1716 | { | |
09a24cbf | 1717 | if (h) |
4c544807 L |
1718 | name = h->root.root.string; |
1719 | else | |
1720 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1b71fb54 | 1721 | (*_bfd_error_handler) |
d003868e | 1722 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
4c544807 | 1723 | abfd, x86_64_elf_howto_table[r_type].name, name); |
1b71fb54 | 1724 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1725 | return FALSE; |
1b71fb54 AJ |
1726 | } |
1727 | /* Fall through. */ | |
1728 | ||
c434dee6 AJ |
1729 | case R_X86_64_PC8: |
1730 | case R_X86_64_PC16: | |
70256ad8 | 1731 | case R_X86_64_PC32: |
d6ab8113 | 1732 | case R_X86_64_PC64: |
1b71fb54 | 1733 | case R_X86_64_64: |
248775ba | 1734 | pointer: |
710ab287 | 1735 | if (h != NULL && info->executable) |
c434dee6 AJ |
1736 | { |
1737 | /* If this reloc is in a read-only section, we might | |
1738 | need a copy reloc. We can't check reliably at this | |
1739 | stage whether the section is read-only, as input | |
1740 | sections have not yet been mapped to output sections. | |
1741 | Tentatively set the flag for now, and correct in | |
1742 | adjust_dynamic_symbol. */ | |
f5385ebf | 1743 | h->non_got_ref = 1; |
c434dee6 AJ |
1744 | |
1745 | /* We may need a .plt entry if the function this reloc | |
1746 | refers to is in a shared lib. */ | |
1747 | h->plt.refcount += 1; | |
d6ab8113 | 1748 | if (r_type != R_X86_64_PC32 && r_type != R_X86_64_PC64) |
f5385ebf | 1749 | h->pointer_equality_needed = 1; |
c434dee6 | 1750 | } |
70256ad8 | 1751 | |
06a6a421 | 1752 | size_reloc = FALSE; |
6a3e1bae | 1753 | do_size: |
70256ad8 AJ |
1754 | /* If we are creating a shared library, and this is a reloc |
1755 | against a global symbol, or a non PC relative reloc | |
1756 | against a local symbol, then we need to copy the reloc | |
1757 | into the shared library. However, if we are linking with | |
1758 | -Bsymbolic, we do not need to copy a reloc against a | |
1759 | global symbol which is defined in an object we are | |
407443a3 | 1760 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
1761 | this point we have not seen all the input files, so it is |
1762 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
1763 | later (it is never cleared). In case of a weak definition, |
1764 | DEF_REGULAR may be cleared later by a strong definition in | |
1765 | a shared library. We account for that possibility below by | |
1766 | storing information in the relocs_copied field of the hash | |
1767 | table entry. A similar situation occurs when creating | |
1768 | shared libraries and symbol visibility changes render the | |
1769 | symbol local. | |
1770 | ||
1771 | If on the other hand, we are creating an executable, we | |
1772 | may need to keep relocations for symbols satisfied by a | |
1773 | dynamic library if we manage to avoid copy relocs for the | |
0f88be7a | 1774 | symbol. */ |
c434dee6 AJ |
1775 | if ((info->shared |
1776 | && (sec->flags & SEC_ALLOC) != 0 | |
d8045f23 | 1777 | && (! IS_X86_64_PCREL_TYPE (r_type) |
c434dee6 | 1778 | || (h != NULL |
55255dae | 1779 | && (! SYMBOLIC_BIND (info, h) |
c434dee6 | 1780 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1781 | || !h->def_regular)))) |
d40d037c AJ |
1782 | || (ELIMINATE_COPY_RELOCS |
1783 | && !info->shared | |
c434dee6 AJ |
1784 | && (sec->flags & SEC_ALLOC) != 0 |
1785 | && h != NULL | |
1786 | && (h->root.type == bfd_link_hash_defweak | |
0f88be7a | 1787 | || !h->def_regular))) |
70256ad8 | 1788 | { |
e03a8ed8 L |
1789 | struct elf_dyn_relocs *p; |
1790 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
1791 | |
1792 | /* We must copy these reloc types into the output file. | |
1793 | Create a reloc section in dynobj and make room for | |
1794 | this reloc. */ | |
70256ad8 AJ |
1795 | if (sreloc == NULL) |
1796 | { | |
c434dee6 AJ |
1797 | if (htab->elf.dynobj == NULL) |
1798 | htab->elf.dynobj = abfd; | |
1799 | ||
83bac4b0 | 1800 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
1801 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
1802 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 1803 | |
70256ad8 | 1804 | if (sreloc == NULL) |
c2e61a4e | 1805 | return FALSE; |
70256ad8 AJ |
1806 | } |
1807 | ||
c434dee6 AJ |
1808 | /* If this is a global symbol, we count the number of |
1809 | relocations we need for this symbol. */ | |
1810 | if (h != NULL) | |
70256ad8 | 1811 | { |
351f65ca | 1812 | head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs; |
c434dee6 AJ |
1813 | } |
1814 | else | |
1815 | { | |
1816 | /* Track dynamic relocs needed for local syms too. | |
1817 | We really need local syms available to do this | |
1818 | easily. Oh well. */ | |
c434dee6 | 1819 | asection *s; |
87d72d41 | 1820 | void **vpp; |
87d72d41 AM |
1821 | |
1822 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1823 | abfd, r_symndx); | |
1824 | if (isym == NULL) | |
1825 | return FALSE; | |
1826 | ||
1827 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 1828 | if (s == NULL) |
87d72d41 | 1829 | s = sec; |
70256ad8 | 1830 | |
e81d3500 DD |
1831 | /* Beware of type punned pointers vs strict aliasing |
1832 | rules. */ | |
1833 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 1834 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 1835 | } |
70256ad8 | 1836 | |
c434dee6 AJ |
1837 | p = *head; |
1838 | if (p == NULL || p->sec != sec) | |
1839 | { | |
1840 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 1841 | |
e03a8ed8 | 1842 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 1843 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 1844 | if (p == NULL) |
c2e61a4e | 1845 | return FALSE; |
c434dee6 AJ |
1846 | p->next = *head; |
1847 | *head = p; | |
1848 | p->sec = sec; | |
1849 | p->count = 0; | |
1850 | p->pc_count = 0; | |
70256ad8 | 1851 | } |
c434dee6 AJ |
1852 | |
1853 | p->count += 1; | |
06a6a421 L |
1854 | /* Count size relocation as PC-relative relocation. */ |
1855 | if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc) | |
c434dee6 | 1856 | p->pc_count += 1; |
70256ad8 AJ |
1857 | } |
1858 | break; | |
fe4770f4 AJ |
1859 | |
1860 | /* This relocation describes the C++ object vtable hierarchy. | |
1861 | Reconstruct it for later use during GC. */ | |
1862 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 1863 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c2e61a4e | 1864 | return FALSE; |
fe4770f4 AJ |
1865 | break; |
1866 | ||
1867 | /* This relocation describes which C++ vtable entries are actually | |
1868 | used. Record for later use during GC. */ | |
1869 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
1870 | BFD_ASSERT (h != NULL); |
1871 | if (h != NULL | |
1872 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
c2e61a4e | 1873 | return FALSE; |
fe4770f4 | 1874 | break; |
c434dee6 AJ |
1875 | |
1876 | default: | |
1877 | break; | |
70256ad8 AJ |
1878 | } |
1879 | } | |
1880 | ||
b34976b6 | 1881 | return TRUE; |
70256ad8 AJ |
1882 | } |
1883 | ||
1884 | /* Return the section that should be marked against GC for a given | |
407443a3 | 1885 | relocation. */ |
70256ad8 AJ |
1886 | |
1887 | static asection * | |
351f65ca L |
1888 | elf_x86_64_gc_mark_hook (asection *sec, |
1889 | struct bfd_link_info *info, | |
1890 | Elf_Internal_Rela *rel, | |
1891 | struct elf_link_hash_entry *h, | |
1892 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
1893 | { |
1894 | if (h != NULL) | |
351f65ca | 1895 | switch (ELF32_R_TYPE (rel->r_info)) |
07adf181 AM |
1896 | { |
1897 | case R_X86_64_GNU_VTINHERIT: | |
1898 | case R_X86_64_GNU_VTENTRY: | |
1899 | return NULL; | |
1900 | } | |
1901 | ||
1902 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
1903 | } |
1904 | ||
407443a3 | 1905 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 | 1906 | |
b34976b6 | 1907 | static bfd_boolean |
351f65ca L |
1908 | elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, |
1909 | asection *sec, | |
1910 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1911 | { |
351f65ca | 1912 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1913 | Elf_Internal_Shdr *symtab_hdr; |
1914 | struct elf_link_hash_entry **sym_hashes; | |
1915 | bfd_signed_vma *local_got_refcounts; | |
1916 | const Elf_Internal_Rela *rel, *relend; | |
c434dee6 | 1917 | |
7dda2462 TG |
1918 | if (info->relocatable) |
1919 | return TRUE; | |
1920 | ||
351f65ca | 1921 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1922 | if (htab == NULL) |
1923 | return FALSE; | |
1924 | ||
c434dee6 | 1925 | elf_section_data (sec)->local_dynrel = NULL; |
70256ad8 | 1926 | |
0ffa91dd | 1927 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 AJ |
1928 | sym_hashes = elf_sym_hashes (abfd); |
1929 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1930 | ||
351f65ca | 1931 | htab = elf_x86_64_hash_table (info); |
70256ad8 AJ |
1932 | relend = relocs + sec->reloc_count; |
1933 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
1934 | { |
1935 | unsigned long r_symndx; | |
1936 | unsigned int r_type; | |
1937 | struct elf_link_hash_entry *h = NULL; | |
70256ad8 | 1938 | |
351f65ca | 1939 | r_symndx = htab->r_sym (rel->r_info); |
26e41594 AM |
1940 | if (r_symndx >= symtab_hdr->sh_info) |
1941 | { | |
26e41594 | 1942 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1943 | while (h->root.type == bfd_link_hash_indirect |
1944 | || h->root.type == bfd_link_hash_warning) | |
1945 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1946 | } |
bb1cb422 L |
1947 | else |
1948 | { | |
1949 | /* A local symbol. */ | |
1950 | Elf_Internal_Sym *isym; | |
1951 | ||
1952 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1953 | abfd, r_symndx); | |
1954 | ||
1955 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
1956 | if (isym != NULL | |
82e96e07 | 1957 | && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
bb1cb422 | 1958 | { |
351f65ca | 1959 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE); |
bb1cb422 L |
1960 | if (h == NULL) |
1961 | abort (); | |
1962 | } | |
1963 | } | |
c434dee6 | 1964 | |
3db2e7dd L |
1965 | if (h) |
1966 | { | |
1967 | struct elf_x86_64_link_hash_entry *eh; | |
1968 | struct elf_dyn_relocs **pp; | |
1969 | struct elf_dyn_relocs *p; | |
1970 | ||
1971 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
1972 | ||
1973 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
1974 | if (p->sec == sec) | |
1975 | { | |
1976 | /* Everything must go for SEC. */ | |
1977 | *pp = p->next; | |
1978 | break; | |
1979 | } | |
1980 | } | |
1981 | ||
351f65ca L |
1982 | r_type = ELF32_R_TYPE (rel->r_info); |
1983 | if (! elf_x86_64_tls_transition (info, abfd, sec, NULL, | |
1984 | symtab_hdr, sym_hashes, | |
1985 | &r_type, GOT_UNKNOWN, | |
1986 | rel, relend, h, r_symndx)) | |
142411ca L |
1987 | return FALSE; |
1988 | ||
26e41594 AM |
1989 | switch (r_type) |
1990 | { | |
1991 | case R_X86_64_TLSLD: | |
4dfe6ac6 NC |
1992 | if (htab->tls_ld_got.refcount > 0) |
1993 | htab->tls_ld_got.refcount -= 1; | |
26e41594 | 1994 | break; |
c434dee6 | 1995 | |
26e41594 | 1996 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
1997 | case R_X86_64_GOTPC32_TLSDESC: |
1998 | case R_X86_64_TLSDESC_CALL: | |
26e41594 AM |
1999 | case R_X86_64_GOTTPOFF: |
2000 | case R_X86_64_GOT32: | |
2001 | case R_X86_64_GOTPCREL: | |
7b81dfbb AJ |
2002 | case R_X86_64_GOT64: |
2003 | case R_X86_64_GOTPCREL64: | |
2004 | case R_X86_64_GOTPLT64: | |
26e41594 AM |
2005 | if (h != NULL) |
2006 | { | |
7b81dfbb | 2007 | if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0) |
eed180f8 | 2008 | h->plt.refcount -= 1; |
26e41594 AM |
2009 | if (h->got.refcount > 0) |
2010 | h->got.refcount -= 1; | |
bb1cb422 L |
2011 | if (h->type == STT_GNU_IFUNC) |
2012 | { | |
2013 | if (h->plt.refcount > 0) | |
2014 | h->plt.refcount -= 1; | |
2015 | } | |
26e41594 AM |
2016 | } |
2017 | else if (local_got_refcounts != NULL) | |
2018 | { | |
2019 | if (local_got_refcounts[r_symndx] > 0) | |
2020 | local_got_refcounts[r_symndx] -= 1; | |
2021 | } | |
2022 | break; | |
c434dee6 | 2023 | |
26e41594 AM |
2024 | case R_X86_64_8: |
2025 | case R_X86_64_16: | |
2026 | case R_X86_64_32: | |
2027 | case R_X86_64_64: | |
2028 | case R_X86_64_32S: | |
2029 | case R_X86_64_PC8: | |
2030 | case R_X86_64_PC16: | |
2031 | case R_X86_64_PC32: | |
d6ab8113 | 2032 | case R_X86_64_PC64: |
1788fc08 L |
2033 | case R_X86_64_SIZE32: |
2034 | case R_X86_64_SIZE64: | |
3db2e7dd L |
2035 | if (info->shared |
2036 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
26e41594 AM |
2037 | break; |
2038 | /* Fall thru */ | |
c434dee6 | 2039 | |
26e41594 | 2040 | case R_X86_64_PLT32: |
7b81dfbb | 2041 | case R_X86_64_PLTOFF64: |
26e41594 AM |
2042 | if (h != NULL) |
2043 | { | |
2044 | if (h->plt.refcount > 0) | |
2045 | h->plt.refcount -= 1; | |
2046 | } | |
2047 | break; | |
70256ad8 | 2048 | |
26e41594 AM |
2049 | default: |
2050 | break; | |
2051 | } | |
2052 | } | |
70256ad8 | 2053 | |
b34976b6 | 2054 | return TRUE; |
70256ad8 AJ |
2055 | } |
2056 | ||
2057 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
2058 | regular object. The current definition is in some section of the | |
2059 | dynamic object, but we're not including those sections. We have to | |
2060 | change the definition to something the rest of the link can | |
407443a3 | 2061 | understand. */ |
70256ad8 | 2062 | |
b34976b6 | 2063 | static bfd_boolean |
351f65ca L |
2064 | elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
2065 | struct elf_link_hash_entry *h) | |
70256ad8 | 2066 | { |
351f65ca | 2067 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 | 2068 | asection *s; |
5ca5bb35 L |
2069 | struct elf_x86_64_link_hash_entry *eh; |
2070 | struct elf_dyn_relocs *p; | |
70256ad8 | 2071 | |
cbe950e9 L |
2072 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2073 | if (h->type == STT_GNU_IFUNC) | |
2074 | { | |
73bcf233 L |
2075 | /* All local STT_GNU_IFUNC references must be treate as local |
2076 | calls via local PLT. */ | |
5ca5bb35 L |
2077 | if (h->ref_regular |
2078 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2079 | { | |
73bcf233 | 2080 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2081 | struct elf_dyn_relocs **pp; |
2082 | ||
2083 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2084 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2085 | { | |
2086 | pc_count += p->pc_count; | |
2087 | p->count -= p->pc_count; | |
2088 | p->pc_count = 0; | |
73bcf233 | 2089 | count += p->count; |
5ca5bb35 L |
2090 | if (p->count == 0) |
2091 | *pp = p->next; | |
2092 | else | |
2093 | pp = &p->next; | |
2094 | } | |
2095 | ||
73bcf233 | 2096 | if (pc_count || count) |
5ca5bb35 L |
2097 | { |
2098 | h->needs_plt = 1; | |
5ca5bb35 | 2099 | h->non_got_ref = 1; |
a5479e5f L |
2100 | if (h->plt.refcount <= 0) |
2101 | h->plt.refcount = 1; | |
2102 | else | |
2103 | h->plt.refcount += 1; | |
5ca5bb35 L |
2104 | } |
2105 | } | |
2106 | ||
cbe950e9 L |
2107 | if (h->plt.refcount <= 0) |
2108 | { | |
2109 | h->plt.offset = (bfd_vma) -1; | |
2110 | h->needs_plt = 0; | |
2111 | } | |
2112 | return TRUE; | |
2113 | } | |
2114 | ||
70256ad8 AJ |
2115 | /* If this is a function, put it in the procedure linkage table. We |
2116 | will fill in the contents of the procedure linkage table later, | |
2117 | when we know the address of the .got section. */ | |
2118 | if (h->type == STT_FUNC | |
f5385ebf | 2119 | || h->needs_plt) |
70256ad8 | 2120 | { |
c434dee6 | 2121 | if (h->plt.refcount <= 0 |
27482721 AJ |
2122 | || SYMBOL_CALLS_LOCAL (info, h) |
2123 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2124 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 2125 | { |
70256ad8 AJ |
2126 | /* This case can occur if we saw a PLT32 reloc in an input |
2127 | file, but the symbol was never referred to by a dynamic | |
2128 | object, or if all references were garbage collected. In | |
2129 | such a case, we don't actually need to build a procedure | |
2130 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 2131 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2132 | h->needs_plt = 0; |
70256ad8 AJ |
2133 | } |
2134 | ||
b34976b6 | 2135 | return TRUE; |
70256ad8 | 2136 | } |
bbd7ec4a | 2137 | else |
c434dee6 AJ |
2138 | /* It's possible that we incorrectly decided a .plt reloc was |
2139 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
2140 | check_relocs. We can't decide accurately between function and | |
2141 | non-function syms in check-relocs; Objects loaded later in | |
2142 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2143 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
2144 | |
2145 | /* If this is a weak symbol, and there is a real definition, the | |
2146 | processor independent code will have arranged for us to see the | |
407443a3 | 2147 | real definition first, and we can just use the same value. */ |
f6e332e6 | 2148 | if (h->u.weakdef != NULL) |
70256ad8 | 2149 | { |
f6e332e6 AM |
2150 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2151 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2152 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2153 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 2154 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 2155 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 2156 | return TRUE; |
70256ad8 AJ |
2157 | } |
2158 | ||
2159 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 2160 | is not a function. */ |
70256ad8 AJ |
2161 | |
2162 | /* If we are creating a shared library, we must presume that the | |
2163 | only references to the symbol are via the global offset table. | |
2164 | For such cases we need not do anything here; the relocations will | |
407443a3 | 2165 | be handled correctly by relocate_section. */ |
70256ad8 | 2166 | if (info->shared) |
b34976b6 | 2167 | return TRUE; |
70256ad8 AJ |
2168 | |
2169 | /* If there are no references to this symbol that do not use the | |
2170 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 2171 | if (!h->non_got_ref) |
b34976b6 | 2172 | return TRUE; |
70256ad8 | 2173 | |
c434dee6 AJ |
2174 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2175 | if (info->nocopyreloc) | |
2176 | { | |
f5385ebf | 2177 | h->non_got_ref = 0; |
b34976b6 | 2178 | return TRUE; |
c434dee6 AJ |
2179 | } |
2180 | ||
d40d037c | 2181 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 2182 | { |
351f65ca | 2183 | eh = (struct elf_x86_64_link_hash_entry *) h; |
d40d037c AJ |
2184 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2185 | { | |
2186 | s = p->sec->output_section; | |
2187 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2188 | break; | |
2189 | } | |
2190 | ||
2191 | /* If we didn't find any dynamic relocs in read-only sections, then | |
2192 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
2193 | if (p == NULL) | |
2194 | { | |
f5385ebf | 2195 | h->non_got_ref = 0; |
d40d037c AJ |
2196 | return TRUE; |
2197 | } | |
c434dee6 AJ |
2198 | } |
2199 | ||
70256ad8 | 2200 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 2201 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
2202 | an entry for this symbol in the .dynsym section. The dynamic |
2203 | object will contain position independent code, so all references | |
2204 | from the dynamic object to this symbol will go through the global | |
2205 | offset table. The dynamic linker will use the .dynsym entry to | |
2206 | determine the address it must put in the global offset table, so | |
2207 | both the dynamic object and the regular object will refer to the | |
2208 | same memory location for the variable. */ | |
2209 | ||
351f65ca | 2210 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2211 | if (htab == NULL) |
2212 | return FALSE; | |
70256ad8 AJ |
2213 | |
2214 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
2215 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 2216 | runtime process image. */ |
1d7e9d18 | 2217 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
70256ad8 | 2218 | { |
351f65ca L |
2219 | const struct elf_backend_data *bed; |
2220 | bed = get_elf_backend_data (info->output_bfd); | |
2221 | htab->srelbss->size += bed->s->sizeof_rela; | |
f5385ebf | 2222 | h->needs_copy = 1; |
70256ad8 AJ |
2223 | } |
2224 | ||
c434dee6 | 2225 | s = htab->sdynbss; |
70256ad8 | 2226 | |
027297b7 | 2227 | return _bfd_elf_adjust_dynamic_copy (h, s); |
70256ad8 AJ |
2228 | } |
2229 | ||
c434dee6 AJ |
2230 | /* Allocate space in .plt, .got and associated reloc sections for |
2231 | dynamic relocs. */ | |
2232 | ||
b34976b6 | 2233 | static bfd_boolean |
351f65ca | 2234 | elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
2235 | { |
2236 | struct bfd_link_info *info; | |
351f65ca L |
2237 | struct elf_x86_64_link_hash_table *htab; |
2238 | struct elf_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 2239 | struct elf_dyn_relocs *p; |
351f65ca | 2240 | const struct elf_backend_data *bed; |
eed180f8 | 2241 | unsigned int plt_entry_size; |
c434dee6 | 2242 | |
e92d460e | 2243 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2244 | return TRUE; |
c434dee6 | 2245 | |
351f65ca | 2246 | eh = (struct elf_x86_64_link_hash_entry *) h; |
e92d460e | 2247 | |
c434dee6 | 2248 | info = (struct bfd_link_info *) inf; |
351f65ca | 2249 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2250 | if (htab == NULL) |
2251 | return FALSE; | |
351f65ca | 2252 | bed = get_elf_backend_data (info->output_bfd); |
eed180f8 | 2253 | plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
c434dee6 | 2254 | |
cbe950e9 L |
2255 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2256 | here if it is defined and referenced in a non-shared object. */ | |
2257 | if (h->type == STT_GNU_IFUNC | |
2258 | && h->def_regular) | |
e03a8ed8 L |
2259 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, |
2260 | &eh->dyn_relocs, | |
eed180f8 | 2261 | plt_entry_size, |
e03a8ed8 | 2262 | GOT_ENTRY_SIZE); |
cbe950e9 L |
2263 | else if (htab->elf.dynamic_sections_created |
2264 | && h->plt.refcount > 0) | |
c434dee6 AJ |
2265 | { |
2266 | /* Make sure this symbol is output as a dynamic symbol. | |
2267 | Undefined weak syms won't yet be marked as dynamic. */ | |
2268 | if (h->dynindx == -1 | |
f5385ebf | 2269 | && !h->forced_local) |
c434dee6 | 2270 | { |
c152c796 | 2271 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2272 | return FALSE; |
c434dee6 AJ |
2273 | } |
2274 | ||
27482721 AJ |
2275 | if (info->shared |
2276 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
c434dee6 | 2277 | { |
6de2ae4a | 2278 | asection *s = htab->elf.splt; |
c434dee6 AJ |
2279 | |
2280 | /* If this is the first .plt entry, make room for the special | |
2281 | first entry. */ | |
eea6121a | 2282 | if (s->size == 0) |
eed180f8 | 2283 | s->size += plt_entry_size; |
c434dee6 | 2284 | |
eea6121a | 2285 | h->plt.offset = s->size; |
c434dee6 AJ |
2286 | |
2287 | /* If this symbol is not defined in a regular file, and we are | |
2288 | not generating a shared library, then set the symbol to this | |
2289 | location in the .plt. This is required to make function | |
2290 | pointers compare as equal between the normal executable and | |
2291 | the shared library. */ | |
2292 | if (! info->shared | |
f5385ebf | 2293 | && !h->def_regular) |
c434dee6 AJ |
2294 | { |
2295 | h->root.u.def.section = s; | |
2296 | h->root.u.def.value = h->plt.offset; | |
2297 | } | |
2298 | ||
2299 | /* Make room for this entry. */ | |
eed180f8 | 2300 | s->size += plt_entry_size; |
c434dee6 AJ |
2301 | |
2302 | /* We also need to make an entry in the .got.plt section, which | |
2303 | will be placed in the .got section by the linker script. */ | |
6de2ae4a | 2304 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; |
c434dee6 AJ |
2305 | |
2306 | /* We also need to make an entry in the .rela.plt section. */ | |
351f65ca | 2307 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
6de2ae4a | 2308 | htab->elf.srelplt->reloc_count++; |
c434dee6 AJ |
2309 | } |
2310 | else | |
2311 | { | |
2312 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 2313 | h->needs_plt = 0; |
c434dee6 AJ |
2314 | } |
2315 | } | |
2316 | else | |
2317 | { | |
2318 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 2319 | h->needs_plt = 0; |
c434dee6 AJ |
2320 | } |
2321 | ||
67a4f2b7 AO |
2322 | eh->tlsdesc_got = (bfd_vma) -1; |
2323 | ||
bffbf940 JJ |
2324 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
2325 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
2326 | if (h->got.refcount > 0 | |
1d85728f | 2327 | && info->executable |
bffbf940 | 2328 | && h->dynindx == -1 |
351f65ca | 2329 | && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) |
d8045f23 NC |
2330 | { |
2331 | h->got.offset = (bfd_vma) -1; | |
2332 | } | |
bffbf940 | 2333 | else if (h->got.refcount > 0) |
c434dee6 AJ |
2334 | { |
2335 | asection *s; | |
b34976b6 | 2336 | bfd_boolean dyn; |
351f65ca | 2337 | int tls_type = elf_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
2338 | |
2339 | /* Make sure this symbol is output as a dynamic symbol. | |
2340 | Undefined weak syms won't yet be marked as dynamic. */ | |
2341 | if (h->dynindx == -1 | |
f5385ebf | 2342 | && !h->forced_local) |
c434dee6 | 2343 | { |
c152c796 | 2344 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2345 | return FALSE; |
c434dee6 AJ |
2346 | } |
2347 | ||
67a4f2b7 AO |
2348 | if (GOT_TLS_GDESC_P (tls_type)) |
2349 | { | |
6de2ae4a | 2350 | eh->tlsdesc_got = htab->elf.sgotplt->size |
351f65ca | 2351 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2352 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2353 | h->got.offset = (bfd_vma) -2; |
2354 | } | |
2355 | if (! GOT_TLS_GDESC_P (tls_type) | |
2356 | || GOT_TLS_GD_P (tls_type)) | |
2357 | { | |
6de2ae4a | 2358 | s = htab->elf.sgot; |
67a4f2b7 AO |
2359 | h->got.offset = s->size; |
2360 | s->size += GOT_ENTRY_SIZE; | |
2361 | if (GOT_TLS_GD_P (tls_type)) | |
2362 | s->size += GOT_ENTRY_SIZE; | |
2363 | } | |
c434dee6 | 2364 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 JJ |
2365 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
2366 | and two if global. | |
2367 | R_X86_64_GOTTPOFF needs one dynamic relocation. */ | |
67a4f2b7 | 2368 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 2369 | || tls_type == GOT_TLS_IE) |
351f65ca | 2370 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 | 2371 | else if (GOT_TLS_GD_P (tls_type)) |
351f65ca | 2372 | htab->elf.srelgot->size += 2 * bed->s->sizeof_rela; |
67a4f2b7 AO |
2373 | else if (! GOT_TLS_GDESC_P (tls_type) |
2374 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2375 | || h->root.type != bfd_link_hash_undefweak) | |
27482721 AJ |
2376 | && (info->shared |
2377 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
351f65ca | 2378 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2379 | if (GOT_TLS_GDESC_P (tls_type)) |
2380 | { | |
351f65ca | 2381 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2382 | htab->tlsdesc_plt = (bfd_vma) -1; |
2383 | } | |
c434dee6 AJ |
2384 | } |
2385 | else | |
2386 | h->got.offset = (bfd_vma) -1; | |
2387 | ||
c434dee6 | 2388 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2389 | return TRUE; |
c434dee6 AJ |
2390 | |
2391 | /* In the shared -Bsymbolic case, discard space allocated for | |
2392 | dynamic pc-relative relocs against symbols which turn out to be | |
2393 | defined in regular objects. For the normal shared case, discard | |
2394 | space for pc-relative relocs that have become local due to symbol | |
2395 | visibility changes. */ | |
2396 | ||
2397 | if (info->shared) | |
2398 | { | |
27482721 AJ |
2399 | /* Relocs that use pc_count are those that appear on a call |
2400 | insn, or certain REL relocs that can generated via assembly. | |
2401 | We want calls to protected symbols to resolve directly to the | |
2402 | function rather than going via the plt. If people want | |
2403 | function pointer comparisons to work as expected then they | |
2404 | should avoid writing weird assembly. */ | |
2405 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 2406 | { |
e03a8ed8 | 2407 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
2408 | |
2409 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2410 | { | |
2411 | p->count -= p->pc_count; | |
2412 | p->pc_count = 0; | |
2413 | if (p->count == 0) | |
2414 | *pp = p->next; | |
2415 | else | |
2416 | pp = &p->next; | |
2417 | } | |
2418 | } | |
4e795f50 AM |
2419 | |
2420 | /* Also discard relocs on undefined weak syms with non-default | |
2421 | visibility. */ | |
22d606e9 | 2422 | if (eh->dyn_relocs != NULL |
4e795f50 | 2423 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
2424 | { |
2425 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2426 | eh->dyn_relocs = NULL; | |
2427 | ||
2428 | /* Make sure undefined weak symbols are output as a dynamic | |
2429 | symbol in PIEs. */ | |
2430 | else if (h->dynindx == -1 | |
d8045f23 NC |
2431 | && ! h->forced_local |
2432 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2433 | return FALSE; | |
22d606e9 | 2434 | } |
cbe950e9 | 2435 | |
d8045f23 | 2436 | } |
d40d037c | 2437 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
2438 | { |
2439 | /* For the non-shared case, discard space for relocs against | |
2440 | symbols which turn out to need copy relocs or are not | |
2441 | dynamic. */ | |
2442 | ||
f5385ebf AM |
2443 | if (!h->non_got_ref |
2444 | && ((h->def_dynamic | |
2445 | && !h->def_regular) | |
c434dee6 AJ |
2446 | || (htab->elf.dynamic_sections_created |
2447 | && (h->root.type == bfd_link_hash_undefweak | |
2448 | || h->root.type == bfd_link_hash_undefined)))) | |
2449 | { | |
2450 | /* Make sure this symbol is output as a dynamic symbol. | |
2451 | Undefined weak syms won't yet be marked as dynamic. */ | |
2452 | if (h->dynindx == -1 | |
d8045f23 NC |
2453 | && ! h->forced_local |
2454 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2455 | return FALSE; | |
c434dee6 AJ |
2456 | |
2457 | /* If that succeeded, we know we'll be keeping all the | |
2458 | relocs. */ | |
2459 | if (h->dynindx != -1) | |
2460 | goto keep; | |
2461 | } | |
2462 | ||
2463 | eh->dyn_relocs = NULL; | |
2464 | ||
2465 | keep: ; | |
2466 | } | |
2467 | ||
2468 | /* Finally, allocate space. */ | |
2469 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2470 | { | |
e7c33416 NC |
2471 | asection * sreloc; |
2472 | ||
cbe950e9 | 2473 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2474 | |
2475 | BFD_ASSERT (sreloc != NULL); | |
2476 | ||
351f65ca | 2477 | sreloc->size += p->count * bed->s->sizeof_rela; |
c434dee6 AJ |
2478 | } |
2479 | ||
b34976b6 | 2480 | return TRUE; |
c434dee6 AJ |
2481 | } |
2482 | ||
c25bc9fc L |
2483 | /* Allocate space in .plt, .got and associated reloc sections for |
2484 | local dynamic relocs. */ | |
2485 | ||
2486 | static bfd_boolean | |
351f65ca | 2487 | elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf) |
c25bc9fc L |
2488 | { |
2489 | struct elf_link_hash_entry *h | |
2490 | = (struct elf_link_hash_entry *) *slot; | |
2491 | ||
2492 | if (h->type != STT_GNU_IFUNC | |
2493 | || !h->def_regular | |
2494 | || !h->ref_regular | |
2495 | || !h->forced_local | |
2496 | || h->root.type != bfd_link_hash_defined) | |
2497 | abort (); | |
2498 | ||
351f65ca | 2499 | return elf_x86_64_allocate_dynrelocs (h, inf); |
c25bc9fc L |
2500 | } |
2501 | ||
c434dee6 AJ |
2502 | /* Find any dynamic relocs that apply to read-only sections. */ |
2503 | ||
b34976b6 | 2504 | static bfd_boolean |
351f65ca L |
2505 | elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h, |
2506 | void * inf) | |
c434dee6 | 2507 | { |
351f65ca | 2508 | struct elf_x86_64_link_hash_entry *eh; |
e03a8ed8 | 2509 | struct elf_dyn_relocs *p; |
c434dee6 | 2510 | |
aa715242 L |
2511 | /* Skip local IFUNC symbols. */ |
2512 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
2513 | return TRUE; | |
2514 | ||
351f65ca | 2515 | eh = (struct elf_x86_64_link_hash_entry *) h; |
c434dee6 AJ |
2516 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2517 | { | |
2518 | asection *s = p->sec->output_section; | |
2519 | ||
2520 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2521 | { | |
2522 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2523 | ||
2524 | info->flags |= DF_TEXTREL; | |
2525 | ||
b70321a2 L |
2526 | if (info->warn_shared_textrel && info->shared) |
2527 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"), | |
2528 | p->sec->owner, h->root.root.string, | |
2529 | p->sec); | |
2530 | ||
c434dee6 | 2531 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 2532 | return FALSE; |
c434dee6 AJ |
2533 | } |
2534 | } | |
b34976b6 | 2535 | return TRUE; |
c434dee6 AJ |
2536 | } |
2537 | ||
daa67607 L |
2538 | /* Convert |
2539 | mov foo@GOTPCREL(%rip), %reg | |
2540 | to | |
2541 | lea foo(%rip), %reg | |
2542 | with the local symbol, foo. */ | |
2543 | ||
2544 | static bfd_boolean | |
2545 | elf_x86_64_convert_mov_to_lea (bfd *abfd, asection *sec, | |
2546 | struct bfd_link_info *link_info) | |
2547 | { | |
2548 | Elf_Internal_Shdr *symtab_hdr; | |
2549 | Elf_Internal_Rela *internal_relocs; | |
2550 | Elf_Internal_Rela *irel, *irelend; | |
2551 | bfd_byte *contents; | |
2552 | struct elf_x86_64_link_hash_table *htab; | |
2553 | bfd_boolean changed_contents; | |
2554 | bfd_boolean changed_relocs; | |
2555 | bfd_signed_vma *local_got_refcounts; | |
2556 | ||
2557 | /* Don't even try to convert non-ELF outputs. */ | |
2558 | if (!is_elf_hash_table (link_info->hash)) | |
2559 | return FALSE; | |
2560 | ||
fbdc86d9 | 2561 | /* Nothing to do if there are no codes, no relocations or no output. */ |
daa67607 | 2562 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
fbdc86d9 L |
2563 | || sec->reloc_count == 0 |
2564 | || discarded_section (sec)) | |
daa67607 L |
2565 | return TRUE; |
2566 | ||
2567 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2568 | ||
2569 | /* Load the relocations for this section. */ | |
2570 | internal_relocs = (_bfd_elf_link_read_relocs | |
2571 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
2572 | link_info->keep_memory)); | |
2573 | if (internal_relocs == NULL) | |
2574 | return FALSE; | |
2575 | ||
2576 | htab = elf_x86_64_hash_table (link_info); | |
2577 | changed_contents = FALSE; | |
2578 | changed_relocs = FALSE; | |
2579 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2580 | ||
2581 | /* Get the section contents. */ | |
2582 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2583 | contents = elf_section_data (sec)->this_hdr.contents; | |
2584 | else | |
2585 | { | |
2586 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2587 | goto error_return; | |
2588 | } | |
2589 | ||
2590 | irelend = internal_relocs + sec->reloc_count; | |
2591 | for (irel = internal_relocs; irel < irelend; irel++) | |
2592 | { | |
2593 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
2594 | unsigned int r_symndx = htab->r_sym (irel->r_info); | |
2595 | unsigned int indx; | |
2596 | struct elf_link_hash_entry *h; | |
2597 | ||
2598 | if (r_type != R_X86_64_GOTPCREL) | |
2599 | continue; | |
2600 | ||
2601 | /* Get the symbol referred to by the reloc. */ | |
2602 | if (r_symndx < symtab_hdr->sh_info) | |
2603 | { | |
2604 | Elf_Internal_Sym *isym; | |
2605 | ||
2606 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2607 | abfd, r_symndx); | |
2608 | ||
2609 | /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */ | |
2610 | if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC | |
2611 | && bfd_get_8 (input_bfd, | |
2612 | contents + irel->r_offset - 2) == 0x8b) | |
2613 | { | |
2614 | bfd_put_8 (output_bfd, 0x8d, | |
2615 | contents + irel->r_offset - 2); | |
2616 | irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32); | |
2617 | if (local_got_refcounts != NULL | |
2618 | && local_got_refcounts[r_symndx] > 0) | |
2619 | local_got_refcounts[r_symndx] -= 1; | |
2620 | changed_contents = TRUE; | |
2621 | changed_relocs = TRUE; | |
2622 | } | |
2623 | continue; | |
2624 | } | |
2625 | ||
2626 | indx = r_symndx - symtab_hdr->sh_info; | |
2627 | h = elf_sym_hashes (abfd)[indx]; | |
2628 | BFD_ASSERT (h != NULL); | |
2629 | ||
2630 | while (h->root.type == bfd_link_hash_indirect | |
2631 | || h->root.type == bfd_link_hash_warning) | |
2632 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2633 | ||
3f65f599 L |
2634 | /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also |
2635 | avoid optimizing _DYNAMIC since ld.so may use its link-time | |
2636 | address. */ | |
daa67607 L |
2637 | if (h->def_regular |
2638 | && h->type != STT_GNU_IFUNC | |
9637f6ef | 2639 | && h != htab->elf.hdynamic |
daa67607 L |
2640 | && SYMBOL_REFERENCES_LOCAL (link_info, h) |
2641 | && bfd_get_8 (input_bfd, | |
2642 | contents + irel->r_offset - 2) == 0x8b) | |
2643 | { | |
2644 | bfd_put_8 (output_bfd, 0x8d, | |
2645 | contents + irel->r_offset - 2); | |
2646 | irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32); | |
2647 | if (h->got.refcount > 0) | |
2648 | h->got.refcount -= 1; | |
2649 | changed_contents = TRUE; | |
2650 | changed_relocs = TRUE; | |
2651 | } | |
2652 | } | |
2653 | ||
2654 | if (contents != NULL | |
2655 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2656 | { | |
2657 | if (!changed_contents && !link_info->keep_memory) | |
2658 | free (contents); | |
2659 | else | |
2660 | { | |
2661 | /* Cache the section contents for elf_link_input_bfd. */ | |
2662 | elf_section_data (sec)->this_hdr.contents = contents; | |
2663 | } | |
2664 | } | |
2665 | ||
2666 | if (elf_section_data (sec)->relocs != internal_relocs) | |
2667 | { | |
2668 | if (!changed_relocs) | |
2669 | free (internal_relocs); | |
2670 | else | |
2671 | elf_section_data (sec)->relocs = internal_relocs; | |
2672 | } | |
2673 | ||
2674 | return TRUE; | |
2675 | ||
2676 | error_return: | |
2677 | if (contents != NULL | |
2678 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2679 | free (contents); | |
2680 | if (internal_relocs != NULL | |
2681 | && elf_section_data (sec)->relocs != internal_relocs) | |
2682 | free (internal_relocs); | |
2683 | return FALSE; | |
2684 | } | |
2685 | ||
70256ad8 AJ |
2686 | /* Set the sizes of the dynamic sections. */ |
2687 | ||
b34976b6 | 2688 | static bfd_boolean |
351f65ca L |
2689 | elf_x86_64_size_dynamic_sections (bfd *output_bfd, |
2690 | struct bfd_link_info *info) | |
70256ad8 | 2691 | { |
351f65ca | 2692 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2693 | bfd *dynobj; |
2694 | asection *s; | |
b34976b6 | 2695 | bfd_boolean relocs; |
c434dee6 | 2696 | bfd *ibfd; |
351f65ca | 2697 | const struct elf_backend_data *bed; |
70256ad8 | 2698 | |
351f65ca | 2699 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2700 | if (htab == NULL) |
2701 | return FALSE; | |
351f65ca | 2702 | bed = get_elf_backend_data (output_bfd); |
4dfe6ac6 | 2703 | |
c434dee6 AJ |
2704 | dynobj = htab->elf.dynobj; |
2705 | if (dynobj == NULL) | |
2706 | abort (); | |
70256ad8 | 2707 | |
c434dee6 | 2708 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
2709 | { |
2710 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 2711 | if (info->executable) |
70256ad8 | 2712 | { |
3d4d4302 | 2713 | s = bfd_get_linker_section (dynobj, ".interp"); |
c434dee6 AJ |
2714 | if (s == NULL) |
2715 | abort (); | |
351f65ca L |
2716 | s->size = htab->dynamic_interpreter_size; |
2717 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
70256ad8 AJ |
2718 | } |
2719 | } | |
70256ad8 | 2720 | |
c434dee6 AJ |
2721 | /* Set up .got offsets for local syms, and space for local dynamic |
2722 | relocs. */ | |
2723 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
70256ad8 | 2724 | { |
c434dee6 AJ |
2725 | bfd_signed_vma *local_got; |
2726 | bfd_signed_vma *end_local_got; | |
bffbf940 | 2727 | char *local_tls_type; |
67a4f2b7 | 2728 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
2729 | bfd_size_type locsymcount; |
2730 | Elf_Internal_Shdr *symtab_hdr; | |
2731 | asection *srel; | |
70256ad8 | 2732 | |
0ffa91dd | 2733 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
2734 | continue; |
2735 | ||
c434dee6 | 2736 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 2737 | { |
e03a8ed8 | 2738 | struct elf_dyn_relocs *p; |
c434dee6 | 2739 | |
daa67607 L |
2740 | if (!elf_x86_64_convert_mov_to_lea (ibfd, s, info)) |
2741 | return FALSE; | |
2742 | ||
e03a8ed8 | 2743 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 2744 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
2745 | p != NULL; |
2746 | p = p->next) | |
70256ad8 | 2747 | { |
c434dee6 AJ |
2748 | if (!bfd_is_abs_section (p->sec) |
2749 | && bfd_is_abs_section (p->sec->output_section)) | |
2750 | { | |
2751 | /* Input section has been discarded, either because | |
2752 | it is a copy of a linkonce section or due to | |
2753 | linker script /DISCARD/, so we'll be discarding | |
2754 | the relocs too. */ | |
2755 | } | |
2756 | else if (p->count != 0) | |
2757 | { | |
2758 | srel = elf_section_data (p->sec)->sreloc; | |
351f65ca | 2759 | srel->size += p->count * bed->s->sizeof_rela; |
4b819e1f L |
2760 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
2761 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
2762 | { |
2763 | info->flags |= DF_TEXTREL; | |
2764 | if (info->warn_shared_textrel && info->shared) | |
2765 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"), | |
2766 | p->sec->owner, p->sec); | |
b70321a2 | 2767 | } |
c434dee6 | 2768 | } |
70256ad8 AJ |
2769 | } |
2770 | } | |
c434dee6 AJ |
2771 | |
2772 | local_got = elf_local_got_refcounts (ibfd); | |
2773 | if (!local_got) | |
2774 | continue; | |
2775 | ||
0ffa91dd | 2776 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
2777 | locsymcount = symtab_hdr->sh_info; |
2778 | end_local_got = local_got + locsymcount; | |
351f65ca L |
2779 | local_tls_type = elf_x86_64_local_got_tls_type (ibfd); |
2780 | local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd); | |
6de2ae4a L |
2781 | s = htab->elf.sgot; |
2782 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
2783 | for (; local_got < end_local_got; |
2784 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 2785 | { |
67a4f2b7 | 2786 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 2787 | if (*local_got > 0) |
70256ad8 | 2788 | { |
67a4f2b7 AO |
2789 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
2790 | { | |
6de2ae4a | 2791 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
351f65ca | 2792 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2793 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2794 | *local_got = (bfd_vma) -2; |
2795 | } | |
2796 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2797 | || GOT_TLS_GD_P (*local_tls_type)) | |
2798 | { | |
2799 | *local_got = s->size; | |
2800 | s->size += GOT_ENTRY_SIZE; | |
2801 | if (GOT_TLS_GD_P (*local_tls_type)) | |
2802 | s->size += GOT_ENTRY_SIZE; | |
2803 | } | |
bffbf940 | 2804 | if (info->shared |
67a4f2b7 | 2805 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 2806 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
2807 | { |
2808 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
2809 | { | |
6de2ae4a | 2810 | htab->elf.srelplt->size |
351f65ca | 2811 | += bed->s->sizeof_rela; |
67a4f2b7 AO |
2812 | htab->tlsdesc_plt = (bfd_vma) -1; |
2813 | } | |
2814 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2815 | || GOT_TLS_GD_P (*local_tls_type)) | |
351f65ca | 2816 | srel->size += bed->s->sizeof_rela; |
67a4f2b7 | 2817 | } |
70256ad8 AJ |
2818 | } |
2819 | else | |
c434dee6 AJ |
2820 | *local_got = (bfd_vma) -1; |
2821 | } | |
2822 | } | |
70256ad8 | 2823 | |
bffbf940 JJ |
2824 | if (htab->tls_ld_got.refcount > 0) |
2825 | { | |
2826 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
2827 | relocs. */ | |
6de2ae4a L |
2828 | htab->tls_ld_got.offset = htab->elf.sgot->size; |
2829 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; | |
351f65ca | 2830 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
bffbf940 JJ |
2831 | } |
2832 | else | |
2833 | htab->tls_ld_got.offset = -1; | |
2834 | ||
c434dee6 AJ |
2835 | /* Allocate global sym .plt and .got entries, and space for global |
2836 | sym dynamic relocs. */ | |
351f65ca | 2837 | elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs, |
eb4ff4d6 | 2838 | info); |
c434dee6 | 2839 | |
c25bc9fc L |
2840 | /* Allocate .plt and .got entries, and space for local symbols. */ |
2841 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 2842 | elf_x86_64_allocate_local_dynrelocs, |
c25bc9fc L |
2843 | info); |
2844 | ||
67a4f2b7 AO |
2845 | /* For every jump slot reserved in the sgotplt, reloc_count is |
2846 | incremented. However, when we reserve space for TLS descriptors, | |
2847 | it's not incremented, so in order to compute the space reserved | |
2848 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 L |
2849 | slot size. |
2850 | ||
2851 | PR ld/13302: We start next_irelative_index at the end of .rela.plt | |
2852 | so that R_X86_64_IRELATIVE entries come last. */ | |
6de2ae4a | 2853 | if (htab->elf.srelplt) |
e1f98742 L |
2854 | { |
2855 | htab->sgotplt_jump_table_size | |
2856 | = elf_x86_64_compute_jump_table_size (htab); | |
2857 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
2858 | } | |
2859 | else if (htab->elf.irelplt) | |
2860 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
67a4f2b7 AO |
2861 | |
2862 | if (htab->tlsdesc_plt) | |
2863 | { | |
2864 | /* If we're not using lazy TLS relocations, don't generate the | |
2865 | PLT and GOT entries they require. */ | |
2866 | if ((info->flags & DF_BIND_NOW)) | |
2867 | htab->tlsdesc_plt = 0; | |
2868 | else | |
2869 | { | |
6de2ae4a L |
2870 | htab->tlsdesc_got = htab->elf.sgot->size; |
2871 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
2872 | /* Reserve room for the initial entry. |
2873 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a | 2874 | if (htab->elf.splt->size == 0) |
eed180f8 | 2875 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
6de2ae4a | 2876 | htab->tlsdesc_plt = htab->elf.splt->size; |
eed180f8 | 2877 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
67a4f2b7 AO |
2878 | } |
2879 | } | |
2880 | ||
a7b16ceb L |
2881 | if (htab->elf.sgotplt) |
2882 | { | |
2883 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
eed180f8 | 2884 | entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
2885 | if ((htab->elf.hgot == NULL |
2886 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
2887 | && (htab->elf.sgotplt->size |
2888 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
2889 | && (htab->elf.splt == NULL |
2890 | || htab->elf.splt->size == 0) | |
2891 | && (htab->elf.sgot == NULL | |
2892 | || htab->elf.sgot->size == 0) | |
2893 | && (htab->elf.iplt == NULL | |
2894 | || htab->elf.iplt->size == 0) | |
2895 | && (htab->elf.igotplt == NULL | |
2896 | || htab->elf.igotplt->size == 0)) | |
2897 | htab->elf.sgotplt->size = 0; | |
2898 | } | |
2899 | ||
9a2a56cc AM |
2900 | if (htab->plt_eh_frame != NULL |
2901 | && htab->elf.splt != NULL | |
2902 | && htab->elf.splt->size != 0 | |
2903 | && !bfd_is_abs_section (htab->elf.splt->output_section) | |
2904 | && _bfd_elf_eh_frame_present (info)) | |
2905 | { | |
2906 | const struct elf_x86_64_backend_data *arch_data | |
2907 | = (const struct elf_x86_64_backend_data *) bed->arch_data; | |
2908 | htab->plt_eh_frame->size = arch_data->eh_frame_plt_size; | |
2909 | } | |
2910 | ||
c434dee6 AJ |
2911 | /* We now have determined the sizes of the various dynamic sections. |
2912 | Allocate memory for them. */ | |
b34976b6 | 2913 | relocs = FALSE; |
c434dee6 AJ |
2914 | for (s = dynobj->sections; s != NULL; s = s->next) |
2915 | { | |
2916 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2917 | continue; | |
2918 | ||
6de2ae4a L |
2919 | if (s == htab->elf.splt |
2920 | || s == htab->elf.sgot | |
2921 | || s == htab->elf.sgotplt | |
2922 | || s == htab->elf.iplt | |
2923 | || s == htab->elf.igotplt | |
9a2a56cc | 2924 | || s == htab->plt_eh_frame |
75ff4589 | 2925 | || s == htab->sdynbss) |
c434dee6 AJ |
2926 | { |
2927 | /* Strip this section if we don't need it; see the | |
2928 | comment below. */ | |
2929 | } | |
0112cd26 | 2930 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 2931 | { |
6de2ae4a | 2932 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 2933 | relocs = TRUE; |
c434dee6 AJ |
2934 | |
2935 | /* We use the reloc_count field as a counter if we need | |
2936 | to copy relocs into the output file. */ | |
6de2ae4a | 2937 | if (s != htab->elf.srelplt) |
67a4f2b7 | 2938 | s->reloc_count = 0; |
70256ad8 | 2939 | } |
c434dee6 | 2940 | else |
70256ad8 AJ |
2941 | { |
2942 | /* It's not one of our sections, so don't allocate space. */ | |
2943 | continue; | |
2944 | } | |
2945 | ||
eea6121a | 2946 | if (s->size == 0) |
70256ad8 | 2947 | { |
c434dee6 AJ |
2948 | /* If we don't need this section, strip it from the |
2949 | output file. This is mostly to handle .rela.bss and | |
2950 | .rela.plt. We must create both sections in | |
2951 | create_dynamic_sections, because they must be created | |
2952 | before the linker maps input sections to output | |
2953 | sections. The linker does that before | |
2954 | adjust_dynamic_symbol is called, and it is that | |
2955 | function which decides whether anything needs to go | |
2956 | into these sections. */ | |
2957 | ||
8423293d | 2958 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
2959 | continue; |
2960 | } | |
2961 | ||
c456f082 AM |
2962 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
2963 | continue; | |
2964 | ||
70256ad8 AJ |
2965 | /* Allocate memory for the section contents. We use bfd_zalloc |
2966 | here in case unused entries are not reclaimed before the | |
2967 | section's contents are written out. This should not happen, | |
2968 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
2969 | of garbage. */ | |
eea6121a | 2970 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 2971 | if (s->contents == NULL) |
b34976b6 | 2972 | return FALSE; |
70256ad8 AJ |
2973 | } |
2974 | ||
e41b3a13 | 2975 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
2976 | && htab->plt_eh_frame->contents != NULL) |
2977 | { | |
2978 | const struct elf_x86_64_backend_data *arch_data | |
2979 | = (const struct elf_x86_64_backend_data *) bed->arch_data; | |
2980 | ||
2981 | memcpy (htab->plt_eh_frame->contents, | |
2982 | arch_data->eh_frame_plt, htab->plt_eh_frame->size); | |
2983 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
2984 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
2985 | } | |
e41b3a13 | 2986 | |
c434dee6 | 2987 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
2988 | { |
2989 | /* Add some entries to the .dynamic section. We fill in the | |
351f65ca | 2990 | values later, in elf_x86_64_finish_dynamic_sections, but we |
70256ad8 | 2991 | must add the entries now so that we get the correct size for |
407443a3 | 2992 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 2993 | dynamic linker and used by the debugger. */ |
dc810e39 | 2994 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 2995 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 2996 | |
36af4a4e | 2997 | if (info->executable) |
70256ad8 | 2998 | { |
dc810e39 | 2999 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3000 | return FALSE; |
70256ad8 AJ |
3001 | } |
3002 | ||
6de2ae4a | 3003 | if (htab->elf.splt->size != 0) |
70256ad8 | 3004 | { |
dc810e39 AM |
3005 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
3006 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
3007 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
3008 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 3009 | return FALSE; |
67a4f2b7 AO |
3010 | |
3011 | if (htab->tlsdesc_plt | |
3012 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
3013 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
3014 | return FALSE; | |
70256ad8 AJ |
3015 | } |
3016 | ||
3017 | if (relocs) | |
3018 | { | |
dc810e39 AM |
3019 | if (!add_dynamic_entry (DT_RELA, 0) |
3020 | || !add_dynamic_entry (DT_RELASZ, 0) | |
351f65ca | 3021 | || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela)) |
b34976b6 | 3022 | return FALSE; |
70256ad8 | 3023 | |
c434dee6 AJ |
3024 | /* If any dynamic relocs apply to a read-only section, |
3025 | then we need a DT_TEXTREL entry. */ | |
3026 | if ((info->flags & DF_TEXTREL) == 0) | |
eed180f8 | 3027 | elf_link_hash_traverse (&htab->elf, |
351f65ca | 3028 | elf_x86_64_readonly_dynrelocs, |
eb4ff4d6 | 3029 | info); |
c434dee6 AJ |
3030 | |
3031 | if ((info->flags & DF_TEXTREL) != 0) | |
3032 | { | |
3033 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 3034 | return FALSE; |
c434dee6 | 3035 | } |
70256ad8 AJ |
3036 | } |
3037 | } | |
dc810e39 | 3038 | #undef add_dynamic_entry |
70256ad8 | 3039 | |
b34976b6 | 3040 | return TRUE; |
70256ad8 AJ |
3041 | } |
3042 | ||
67a4f2b7 | 3043 | static bfd_boolean |
351f65ca L |
3044 | elf_x86_64_always_size_sections (bfd *output_bfd, |
3045 | struct bfd_link_info *info) | |
67a4f2b7 AO |
3046 | { |
3047 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3048 | ||
3049 | if (tls_sec) | |
3050 | { | |
3051 | struct elf_link_hash_entry *tlsbase; | |
3052 | ||
3053 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3054 | "_TLS_MODULE_BASE_", | |
3055 | FALSE, FALSE, FALSE); | |
3056 | ||
3057 | if (tlsbase && tlsbase->type == STT_TLS) | |
3058 | { | |
351f65ca | 3059 | struct elf_x86_64_link_hash_table *htab; |
67a4f2b7 AO |
3060 | struct bfd_link_hash_entry *bh = NULL; |
3061 | const struct elf_backend_data *bed | |
3062 | = get_elf_backend_data (output_bfd); | |
3063 | ||
351f65ca | 3064 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3065 | if (htab == NULL) |
3066 | return FALSE; | |
3067 | ||
67a4f2b7 AO |
3068 | if (!(_bfd_generic_link_add_one_symbol |
3069 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3070 | tls_sec, 0, NULL, FALSE, | |
3071 | bed->collect, &bh))) | |
3072 | return FALSE; | |
9f03412a | 3073 | |
4dfe6ac6 | 3074 | htab->tls_module_base = bh; |
9f03412a | 3075 | |
67a4f2b7 AO |
3076 | tlsbase = (struct elf_link_hash_entry *)bh; |
3077 | tlsbase->def_regular = 1; | |
3078 | tlsbase->other = STV_HIDDEN; | |
3079 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
3080 | } | |
3081 | } | |
3082 | ||
3083 | return TRUE; | |
3084 | } | |
3085 | ||
9f03412a AO |
3086 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
3087 | executables. Rather than setting it to the beginning of the TLS | |
3088 | section, we have to set it to the end. This function may be called | |
3089 | multiple times, it is idempotent. */ | |
3090 | ||
3091 | static void | |
351f65ca | 3092 | elf_x86_64_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 3093 | { |
351f65ca | 3094 | struct elf_x86_64_link_hash_table *htab; |
9f03412a AO |
3095 | struct bfd_link_hash_entry *base; |
3096 | ||
3097 | if (!info->executable) | |
3098 | return; | |
3099 | ||
351f65ca | 3100 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3101 | if (htab == NULL) |
3102 | return; | |
9f03412a | 3103 | |
4dfe6ac6 NC |
3104 | base = htab->tls_module_base; |
3105 | if (base == NULL) | |
9f03412a AO |
3106 | return; |
3107 | ||
4dfe6ac6 | 3108 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
3109 | } |
3110 | ||
bffbf940 JJ |
3111 | /* Return the base VMA address which should be subtracted from real addresses |
3112 | when resolving @dtpoff relocation. | |
3113 | This is PT_TLS segment p_vaddr. */ | |
3114 | ||
3115 | static bfd_vma | |
351f65ca | 3116 | elf_x86_64_dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 3117 | { |
e1918d23 AM |
3118 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3119 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 3120 | return 0; |
e1918d23 | 3121 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
3122 | } |
3123 | ||
3124 | /* Return the relocation value for @tpoff relocation | |
3125 | if STT_TLS virtual address is ADDRESS. */ | |
3126 | ||
3127 | static bfd_vma | |
351f65ca | 3128 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 3129 | { |
e1918d23 | 3130 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3131 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3132 | bfd_vma static_tls_size; | |
bffbf940 JJ |
3133 | |
3134 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 3135 | if (htab->tls_sec == NULL) |
bffbf940 | 3136 | return 0; |
7dc98aea RO |
3137 | |
3138 | /* Consider special static TLS alignment requirements. */ | |
3139 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3140 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
3141 | } |
3142 | ||
90f487df L |
3143 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
3144 | branch? */ | |
3145 | ||
3146 | static bfd_boolean | |
3147 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
3148 | { | |
3149 | /* Opcode Instruction | |
3150 | 0xe8 call | |
3151 | 0xe9 jump | |
3152 | 0x0f 0x8x conditional jump */ | |
3153 | return ((offset > 0 | |
3154 | && (contents [offset - 1] == 0xe8 | |
3155 | || contents [offset - 1] == 0xe9)) | |
3156 | || (offset > 1 | |
3157 | && contents [offset - 2] == 0x0f | |
3158 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
3159 | } | |
3160 | ||
8d88c4ca NC |
3161 | /* Relocate an x86_64 ELF section. */ |
3162 | ||
b34976b6 | 3163 | static bfd_boolean |
351f65ca L |
3164 | elf_x86_64_relocate_section (bfd *output_bfd, |
3165 | struct bfd_link_info *info, | |
3166 | bfd *input_bfd, | |
3167 | asection *input_section, | |
3168 | bfd_byte *contents, | |
3169 | Elf_Internal_Rela *relocs, | |
3170 | Elf_Internal_Sym *local_syms, | |
3171 | asection **local_sections) | |
8d88c4ca | 3172 | { |
351f65ca | 3173 | struct elf_x86_64_link_hash_table *htab; |
8d88c4ca NC |
3174 | Elf_Internal_Shdr *symtab_hdr; |
3175 | struct elf_link_hash_entry **sym_hashes; | |
3176 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3177 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 3178 | Elf_Internal_Rela *rel; |
8d88c4ca | 3179 | Elf_Internal_Rela *relend; |
eed180f8 | 3180 | const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
8d88c4ca | 3181 | |
0ffa91dd NC |
3182 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
3183 | ||
351f65ca | 3184 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3185 | if (htab == NULL) |
3186 | return FALSE; | |
0ffa91dd | 3187 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
3188 | sym_hashes = elf_sym_hashes (input_bfd); |
3189 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
351f65ca | 3190 | local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 3191 | |
351f65ca | 3192 | elf_x86_64_set_tls_module_base (info); |
9f03412a | 3193 | |
c434dee6 | 3194 | rel = relocs; |
8d88c4ca | 3195 | relend = relocs + input_section->reloc_count; |
c434dee6 | 3196 | for (; rel < relend; rel++) |
8d88c4ca | 3197 | { |
bffbf940 | 3198 | unsigned int r_type; |
8d88c4ca NC |
3199 | reloc_howto_type *howto; |
3200 | unsigned long r_symndx; | |
3201 | struct elf_link_hash_entry *h; | |
3202 | Elf_Internal_Sym *sym; | |
3203 | asection *sec; | |
67a4f2b7 | 3204 | bfd_vma off, offplt; |
8d88c4ca | 3205 | bfd_vma relocation; |
b34976b6 | 3206 | bfd_boolean unresolved_reloc; |
8d88c4ca | 3207 | bfd_reloc_status_type r; |
bffbf940 | 3208 | int tls_type; |
cbe950e9 | 3209 | asection *base_got; |
1788fc08 | 3210 | bfd_vma st_size; |
8d88c4ca | 3211 | |
351f65ca | 3212 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
3213 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
3214 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
3215 | continue; | |
8d88c4ca | 3216 | |
9911c0fc | 3217 | if (r_type >= (int) R_X86_64_standard) |
8da6118f | 3218 | { |
9911c0fc L |
3219 | (*_bfd_error_handler) |
3220 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), | |
3221 | input_bfd, input_section, r_type); | |
8da6118f | 3222 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 3223 | return FALSE; |
8da6118f | 3224 | } |
8d88c4ca | 3225 | |
d7921315 | 3226 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 3227 | || ABI_64_P (output_bfd)) |
d7921315 L |
3228 | howto = x86_64_elf_howto_table + r_type; |
3229 | else | |
3230 | howto = (x86_64_elf_howto_table | |
3231 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 3232 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
3233 | h = NULL; |
3234 | sym = NULL; | |
3235 | sec = NULL; | |
b34976b6 | 3236 | unresolved_reloc = FALSE; |
8d88c4ca | 3237 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
3238 | { |
3239 | sym = local_syms + r_symndx; | |
3240 | sec = local_sections[r_symndx]; | |
c434dee6 | 3241 | |
c25bc9fc L |
3242 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
3243 | &sec, rel); | |
1788fc08 | 3244 | st_size = sym->st_size; |
c25bc9fc L |
3245 | |
3246 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
1f85278f | 3247 | if (!info->relocatable |
351f65ca | 3248 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 3249 | { |
351f65ca L |
3250 | h = elf_x86_64_get_local_sym_hash (htab, input_bfd, |
3251 | rel, FALSE); | |
c25bc9fc L |
3252 | if (h == NULL) |
3253 | abort (); | |
3254 | ||
eed180f8 | 3255 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
3256 | h->root.u.def.value = sym->st_value; |
3257 | h->root.u.def.section = sec; | |
3258 | } | |
8da6118f | 3259 | } |
8d88c4ca | 3260 | else |
8da6118f | 3261 | { |
c9736ba0 | 3262 | bfd_boolean warned ATTRIBUTE_UNUSED; |
c434dee6 | 3263 | |
b2a8e766 AM |
3264 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3265 | r_symndx, symtab_hdr, sym_hashes, | |
3266 | h, sec, relocation, | |
3267 | unresolved_reloc, warned); | |
1788fc08 | 3268 | st_size = h->size; |
8da6118f | 3269 | } |
ab96bf03 | 3270 | |
dbaa2011 | 3271 | if (sec != NULL && discarded_section (sec)) |
0672748a | 3272 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 3273 | rel, 1, relend, howto, 0, contents); |
ab96bf03 AM |
3274 | |
3275 | if (info->relocatable) | |
3276 | continue; | |
3277 | ||
1788fc08 | 3278 | if (rel->r_addend == 0 && !ABI_64_P (output_bfd)) |
64d25c44 | 3279 | { |
1788fc08 L |
3280 | if (r_type == R_X86_64_64) |
3281 | { | |
3282 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and | |
3283 | zero-extend it to 64bit if addend is zero. */ | |
3284 | r_type = R_X86_64_32; | |
3285 | memset (contents + rel->r_offset + 4, 0, 4); | |
3286 | } | |
3287 | else if (r_type == R_X86_64_SIZE64) | |
3288 | { | |
3289 | /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and | |
3290 | zero-extend it to 64bit if addend is zero. */ | |
3291 | r_type = R_X86_64_SIZE32; | |
3292 | memset (contents + rel->r_offset + 4, 0, 4); | |
3293 | } | |
64d25c44 L |
3294 | } |
3295 | ||
cbe950e9 L |
3296 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3297 | it here if it is defined in a non-shared object. */ | |
3298 | if (h != NULL | |
3299 | && h->type == STT_GNU_IFUNC | |
3300 | && h->def_regular) | |
3301 | { | |
3302 | asection *plt; | |
3303 | bfd_vma plt_index; | |
4c544807 | 3304 | const char *name; |
cbe950e9 L |
3305 | |
3306 | if ((input_section->flags & SEC_ALLOC) == 0 | |
3307 | || h->plt.offset == (bfd_vma) -1) | |
3308 | abort (); | |
3309 | ||
3310 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 3311 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
cbe950e9 L |
3312 | relocation = (plt->output_section->vma |
3313 | + plt->output_offset + h->plt.offset); | |
3314 | ||
3315 | switch (r_type) | |
3316 | { | |
3317 | default: | |
4c544807 L |
3318 | if (h->root.root.string) |
3319 | name = h->root.root.string; | |
3320 | else | |
3321 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
3322 | NULL); | |
cbe950e9 L |
3323 | (*_bfd_error_handler) |
3324 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
3325 | "symbol `%s' isn't handled by %s"), input_bfd, | |
3326 | x86_64_elf_howto_table[r_type].name, | |
4c544807 | 3327 | name, __FUNCTION__); |
cbe950e9 L |
3328 | bfd_set_error (bfd_error_bad_value); |
3329 | return FALSE; | |
3330 | ||
3331 | case R_X86_64_32S: | |
710ab287 | 3332 | if (info->shared) |
cbe950e9 | 3333 | abort (); |
710ab287 L |
3334 | goto do_relocation; |
3335 | ||
248775ba L |
3336 | case R_X86_64_32: |
3337 | if (ABI_64_P (output_bfd)) | |
3338 | goto do_relocation; | |
17672001 | 3339 | /* FALLTHROUGH */ |
eed180f8 | 3340 | case R_X86_64_64: |
710ab287 L |
3341 | if (rel->r_addend != 0) |
3342 | { | |
4c544807 L |
3343 | if (h->root.root.string) |
3344 | name = h->root.root.string; | |
3345 | else | |
3346 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3347 | sym, NULL); | |
710ab287 L |
3348 | (*_bfd_error_handler) |
3349 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
3350 | "symbol `%s' has non-zero addend: %d"), | |
3351 | input_bfd, x86_64_elf_howto_table[r_type].name, | |
4c544807 | 3352 | name, rel->r_addend); |
710ab287 L |
3353 | bfd_set_error (bfd_error_bad_value); |
3354 | return FALSE; | |
3355 | } | |
3356 | ||
3357 | /* Generate dynamic relcoation only when there is a | |
c293fa49 | 3358 | non-GOT reference in a shared object. */ |
710ab287 L |
3359 | if (info->shared && h->non_got_ref) |
3360 | { | |
3361 | Elf_Internal_Rela outrel; | |
710ab287 L |
3362 | asection *sreloc; |
3363 | ||
c25bc9fc L |
3364 | /* Need a dynamic relocation to get the real function |
3365 | address. */ | |
710ab287 L |
3366 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
3367 | info, | |
3368 | input_section, | |
3369 | rel->r_offset); | |
3370 | if (outrel.r_offset == (bfd_vma) -1 | |
3371 | || outrel.r_offset == (bfd_vma) -2) | |
3372 | abort (); | |
3373 | ||
3374 | outrel.r_offset += (input_section->output_section->vma | |
3375 | + input_section->output_offset); | |
3376 | ||
3377 | if (h->dynindx == -1 | |
44c4ea11 L |
3378 | || h->forced_local |
3379 | || info->executable) | |
710ab287 L |
3380 | { |
3381 | /* This symbol is resolved locally. */ | |
56b8aada L |
3382 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
3383 | outrel.r_addend = (h->root.u.def.value | |
3384 | + h->root.u.def.section->output_section->vma | |
3385 | + h->root.u.def.section->output_offset); | |
710ab287 L |
3386 | } |
3387 | else | |
3388 | { | |
351f65ca | 3389 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
3390 | outrel.r_addend = 0; |
3391 | } | |
3392 | ||
6de2ae4a | 3393 | sreloc = htab->elf.irelifunc; |
351f65ca | 3394 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
3395 | |
3396 | /* If this reloc is against an external symbol, we | |
3397 | do not want to fiddle with the addend. Otherwise, | |
3398 | we need to include the symbol value so that it | |
3399 | becomes an addend for the dynamic reloc. For an | |
3400 | internal symbol, we have updated addend. */ | |
56b8aada | 3401 | continue; |
710ab287 | 3402 | } |
17672001 | 3403 | /* FALLTHROUGH */ |
cbe950e9 L |
3404 | case R_X86_64_PC32: |
3405 | case R_X86_64_PC64: | |
3406 | case R_X86_64_PLT32: | |
3407 | goto do_relocation; | |
3408 | ||
3409 | case R_X86_64_GOTPCREL: | |
3410 | case R_X86_64_GOTPCREL64: | |
6de2ae4a | 3411 | base_got = htab->elf.sgot; |
cbe950e9 L |
3412 | off = h->got.offset; |
3413 | ||
7afd84dc | 3414 | if (base_got == NULL) |
cbe950e9 L |
3415 | abort (); |
3416 | ||
7afd84dc | 3417 | if (off == (bfd_vma) -1) |
cbe950e9 | 3418 | { |
7afd84dc L |
3419 | /* We can't use h->got.offset here to save state, or |
3420 | even just remember the offset, as finish_dynamic_symbol | |
3421 | would use that as offset into .got. */ | |
cbe950e9 | 3422 | |
6de2ae4a | 3423 | if (htab->elf.splt != NULL) |
7afd84dc | 3424 | { |
eed180f8 | 3425 | plt_index = h->plt.offset / plt_entry_size - 1; |
7afd84dc | 3426 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 3427 | base_got = htab->elf.sgotplt; |
7afd84dc | 3428 | } |
cbe950e9 L |
3429 | else |
3430 | { | |
eed180f8 | 3431 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 3432 | off = plt_index * GOT_ENTRY_SIZE; |
6de2ae4a | 3433 | base_got = htab->elf.igotplt; |
7afd84dc L |
3434 | } |
3435 | ||
3436 | if (h->dynindx == -1 | |
3437 | || h->forced_local | |
3438 | || info->symbolic) | |
3439 | { | |
eed180f8 | 3440 | /* This references the local defitionion. We must |
7afd84dc | 3441 | initialize this entry in the global offset table. |
eed180f8 | 3442 | Since the offset must always be a multiple of 8, |
7afd84dc L |
3443 | we use the least significant bit to record |
3444 | whether we have initialized it already. | |
3445 | ||
3446 | When doing a dynamic link, we create a .rela.got | |
3447 | relocation entry to initialize the value. This | |
3448 | is done in the finish_dynamic_symbol routine. */ | |
3449 | if ((off & 1) != 0) | |
3450 | off &= ~1; | |
3451 | else | |
3452 | { | |
3453 | bfd_put_64 (output_bfd, relocation, | |
3454 | base_got->contents + off); | |
3455 | /* Note that this is harmless for the GOTPLT64 | |
3456 | case, as -1 | 1 still is -1. */ | |
3457 | h->got.offset |= 1; | |
3458 | } | |
cbe950e9 L |
3459 | } |
3460 | } | |
3461 | ||
3462 | relocation = (base_got->output_section->vma | |
3463 | + base_got->output_offset + off); | |
3464 | ||
cbe950e9 L |
3465 | goto do_relocation; |
3466 | } | |
3467 | } | |
3468 | ||
70256ad8 AJ |
3469 | /* When generating a shared object, the relocations handled here are |
3470 | copied into the output file to be resolved at run time. */ | |
3471 | switch (r_type) | |
3472 | { | |
3473 | case R_X86_64_GOT32: | |
7b81dfbb | 3474 | case R_X86_64_GOT64: |
70256ad8 AJ |
3475 | /* Relocation is to the entry for this symbol in the global |
3476 | offset table. */ | |
70256ad8 | 3477 | case R_X86_64_GOTPCREL: |
7b81dfbb AJ |
3478 | case R_X86_64_GOTPCREL64: |
3479 | /* Use global offset table entry as symbol value. */ | |
3480 | case R_X86_64_GOTPLT64: | |
3481 | /* This is the same as GOT64 for relocation purposes, but | |
3482 | indicates the existence of a PLT entry. The difficulty is, | |
3483 | that we must calculate the GOT slot offset from the PLT | |
3484 | offset, if this symbol got a PLT entry (it was global). | |
3485 | Additionally if it's computed from the PLT entry, then that | |
3486 | GOT offset is relative to .got.plt, not to .got. */ | |
6de2ae4a | 3487 | base_got = htab->elf.sgot; |
7b81dfbb | 3488 | |
6de2ae4a | 3489 | if (htab->elf.sgot == NULL) |
c434dee6 | 3490 | abort (); |
053579d7 | 3491 | |
51e0a107 | 3492 | if (h != NULL) |
70256ad8 | 3493 | { |
b34976b6 | 3494 | bfd_boolean dyn; |
c434dee6 AJ |
3495 | |
3496 | off = h->got.offset; | |
7b81dfbb | 3497 | if (h->needs_plt |
eed180f8 | 3498 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
3499 | && off == (bfd_vma)-1) |
3500 | { | |
3501 | /* We can't use h->got.offset here to save | |
3502 | state, or even just remember the offset, as | |
3503 | finish_dynamic_symbol would use that as offset into | |
3504 | .got. */ | |
eed180f8 | 3505 | bfd_vma plt_index = h->plt.offset / plt_entry_size - 1; |
7b81dfbb | 3506 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 3507 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
3508 | } |
3509 | ||
c434dee6 | 3510 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 3511 | |
27482721 | 3512 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
51e0a107 | 3513 | || (info->shared |
27482721 | 3514 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
3515 | || (ELF_ST_VISIBILITY (h->other) |
3516 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
3517 | { |
3518 | /* This is actually a static link, or it is a -Bsymbolic | |
3519 | link and the symbol is defined locally, or the symbol | |
407443a3 | 3520 | was forced to be local because of a version file. We |
51e0a107 JH |
3521 | must initialize this entry in the global offset table. |
3522 | Since the offset must always be a multiple of 8, we | |
3523 | use the least significant bit to record whether we | |
3524 | have initialized it already. | |
3525 | ||
3526 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
3527 | relocation entry to initialize the value. This is |
3528 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
3529 | if ((off & 1) != 0) |
3530 | off &= ~1; | |
3531 | else | |
3532 | { | |
3533 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
3534 | base_got->contents + off); |
3535 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 3536 | as -1 | 1 still is -1. */ |
51e0a107 JH |
3537 | h->got.offset |= 1; |
3538 | } | |
3539 | } | |
053579d7 | 3540 | else |
b34976b6 | 3541 | unresolved_reloc = FALSE; |
70256ad8 | 3542 | } |
51e0a107 JH |
3543 | else |
3544 | { | |
c434dee6 AJ |
3545 | if (local_got_offsets == NULL) |
3546 | abort (); | |
51e0a107 JH |
3547 | |
3548 | off = local_got_offsets[r_symndx]; | |
3549 | ||
3550 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
3551 | the least significant bit to record whether we have |
3552 | already generated the necessary reloc. */ | |
51e0a107 JH |
3553 | if ((off & 1) != 0) |
3554 | off &= ~1; | |
3555 | else | |
3556 | { | |
c434dee6 | 3557 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 3558 | base_got->contents + off); |
51e0a107 JH |
3559 | |
3560 | if (info->shared) | |
3561 | { | |
947216bf | 3562 | asection *s; |
51e0a107 | 3563 | Elf_Internal_Rela outrel; |
70256ad8 | 3564 | |
51e0a107 JH |
3565 | /* We need to generate a R_X86_64_RELATIVE reloc |
3566 | for the dynamic linker. */ | |
6de2ae4a | 3567 | s = htab->elf.srelgot; |
947216bf | 3568 | if (s == NULL) |
c434dee6 | 3569 | abort (); |
51e0a107 | 3570 | |
7b81dfbb AJ |
3571 | outrel.r_offset = (base_got->output_section->vma |
3572 | + base_got->output_offset | |
51e0a107 | 3573 | + off); |
351f65ca | 3574 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
51e0a107 | 3575 | outrel.r_addend = relocation; |
351f65ca | 3576 | elf_append_rela (output_bfd, s, &outrel); |
51e0a107 JH |
3577 | } |
3578 | ||
3579 | local_got_offsets[r_symndx] |= 1; | |
3580 | } | |
51e0a107 | 3581 | } |
6a2bda3f | 3582 | |
c434dee6 AJ |
3583 | if (off >= (bfd_vma) -2) |
3584 | abort (); | |
3585 | ||
7b81dfbb AJ |
3586 | relocation = base_got->output_section->vma |
3587 | + base_got->output_offset + off; | |
3588 | if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
3589 | relocation -= htab->elf.sgotplt->output_section->vma |
3590 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 3591 | |
70256ad8 AJ |
3592 | break; |
3593 | ||
d6ab8113 JB |
3594 | case R_X86_64_GOTOFF64: |
3595 | /* Relocation is relative to the start of the global offset | |
3596 | table. */ | |
3597 | ||
3598 | /* Check to make sure it isn't a protected function symbol | |
3599 | for shared library since it may not be local when used | |
3600 | as function address. */ | |
bdb892b9 | 3601 | if (!info->executable |
d6ab8113 | 3602 | && h |
bdb892b9 | 3603 | && !SYMBOLIC_BIND (info, h) |
d6ab8113 JB |
3604 | && h->def_regular |
3605 | && h->type == STT_FUNC | |
3606 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
3607 | { | |
3608 | (*_bfd_error_handler) | |
3609 | (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"), | |
3610 | input_bfd, h->root.root.string); | |
3611 | bfd_set_error (bfd_error_bad_value); | |
3612 | return FALSE; | |
3613 | } | |
3614 | ||
3615 | /* Note that sgot is not involved in this | |
3616 | calculation. We always want the start of .got.plt. If we | |
3617 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
3618 | permitted by the ABI, we might have to change this | |
3619 | calculation. */ | |
6de2ae4a L |
3620 | relocation -= htab->elf.sgotplt->output_section->vma |
3621 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3622 | break; |
3623 | ||
3624 | case R_X86_64_GOTPC32: | |
7b81dfbb | 3625 | case R_X86_64_GOTPC64: |
d6ab8113 | 3626 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
3627 | relocation = htab->elf.sgotplt->output_section->vma |
3628 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3629 | unresolved_reloc = FALSE; |
3630 | break; | |
7b81dfbb AJ |
3631 | |
3632 | case R_X86_64_PLTOFF64: | |
3633 | /* Relocation is PLT entry relative to GOT. For local | |
3634 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 3635 | if (h != NULL |
7b81dfbb AJ |
3636 | /* See PLT32 handling. */ |
3637 | && h->plt.offset != (bfd_vma) -1 | |
6de2ae4a | 3638 | && htab->elf.splt != NULL) |
7b81dfbb | 3639 | { |
6de2ae4a L |
3640 | relocation = (htab->elf.splt->output_section->vma |
3641 | + htab->elf.splt->output_offset | |
7b81dfbb AJ |
3642 | + h->plt.offset); |
3643 | unresolved_reloc = FALSE; | |
3644 | } | |
3645 | ||
6de2ae4a L |
3646 | relocation -= htab->elf.sgotplt->output_section->vma |
3647 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 3648 | break; |
d6ab8113 | 3649 | |
70256ad8 AJ |
3650 | case R_X86_64_PLT32: |
3651 | /* Relocation is to the entry for this symbol in the | |
3652 | procedure linkage table. */ | |
3653 | ||
3654 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 3655 | without using the procedure linkage table. */ |
70256ad8 AJ |
3656 | if (h == NULL) |
3657 | break; | |
3658 | ||
c434dee6 | 3659 | if (h->plt.offset == (bfd_vma) -1 |
6de2ae4a | 3660 | || htab->elf.splt == NULL) |
70256ad8 AJ |
3661 | { |
3662 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
3663 | happens when statically linking PIC code, or when |
3664 | using -Bsymbolic. */ | |
70256ad8 AJ |
3665 | break; |
3666 | } | |
3667 | ||
6de2ae4a L |
3668 | relocation = (htab->elf.splt->output_section->vma |
3669 | + htab->elf.splt->output_offset | |
70256ad8 | 3670 | + h->plt.offset); |
b34976b6 | 3671 | unresolved_reloc = FALSE; |
70256ad8 AJ |
3672 | break; |
3673 | ||
1788fc08 L |
3674 | case R_X86_64_SIZE32: |
3675 | case R_X86_64_SIZE64: | |
1788fc08 L |
3676 | /* Set to symbol size. */ |
3677 | relocation = st_size; | |
3678 | goto direct; | |
3679 | ||
fd8ab9e5 AJ |
3680 | case R_X86_64_PC8: |
3681 | case R_X86_64_PC16: | |
3682 | case R_X86_64_PC32: | |
6610a52d | 3683 | if (info->shared |
ba3bee0b | 3684 | && (input_section->flags & SEC_ALLOC) != 0 |
90f487df | 3685 | && (input_section->flags & SEC_READONLY) != 0 |
41bed6dd | 3686 | && h != NULL) |
6610a52d | 3687 | { |
41bed6dd L |
3688 | bfd_boolean fail = FALSE; |
3689 | bfd_boolean branch | |
3690 | = (r_type == R_X86_64_PC32 | |
3691 | && is_32bit_relative_branch (contents, rel->r_offset)); | |
3692 | ||
3693 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
3694 | { | |
3695 | /* Symbol is referenced locally. Make sure it is | |
3696 | defined locally or for a branch. */ | |
3697 | fail = !h->def_regular && !branch; | |
3698 | } | |
90f487df | 3699 | else |
41bed6dd L |
3700 | { |
3701 | /* Symbol isn't referenced locally. We only allow | |
3702 | branch to symbol with non-default visibility. */ | |
3703 | fail = (!branch | |
3704 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
3705 | } | |
3706 | ||
3707 | if (fail) | |
3708 | { | |
3709 | const char *fmt; | |
3710 | const char *v; | |
3711 | const char *pic = ""; | |
3712 | ||
3713 | switch (ELF_ST_VISIBILITY (h->other)) | |
3714 | { | |
3715 | case STV_HIDDEN: | |
3716 | v = _("hidden symbol"); | |
3717 | break; | |
3718 | case STV_INTERNAL: | |
3719 | v = _("internal symbol"); | |
3720 | break; | |
3721 | case STV_PROTECTED: | |
3722 | v = _("protected symbol"); | |
3723 | break; | |
3724 | default: | |
3725 | v = _("symbol"); | |
3726 | pic = _("; recompile with -fPIC"); | |
3727 | break; | |
3728 | } | |
3729 | ||
3730 | if (h->def_regular) | |
3731 | fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s"); | |
3732 | else | |
3733 | fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s"); | |
3734 | ||
3735 | (*_bfd_error_handler) (fmt, input_bfd, | |
3736 | x86_64_elf_howto_table[r_type].name, | |
3737 | v, h->root.root.string, pic); | |
3738 | bfd_set_error (bfd_error_bad_value); | |
3739 | return FALSE; | |
3740 | } | |
6610a52d L |
3741 | } |
3742 | /* Fall through. */ | |
3743 | ||
70256ad8 AJ |
3744 | case R_X86_64_8: |
3745 | case R_X86_64_16: | |
3746 | case R_X86_64_32: | |
d6ab8113 | 3747 | case R_X86_64_PC64: |
6b3db546 | 3748 | case R_X86_64_64: |
80643fbc | 3749 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 3750 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 3751 | |
1788fc08 | 3752 | direct: |
b1e24c02 | 3753 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
3754 | break; |
3755 | ||
3756 | if ((info->shared | |
4bc6e03a AJ |
3757 | && (h == NULL |
3758 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3759 | || h->root.type != bfd_link_hash_undefweak) | |
1788fc08 L |
3760 | && ((! IS_X86_64_PCREL_TYPE (r_type) |
3761 | && r_type != R_X86_64_SIZE32 | |
3762 | && r_type != R_X86_64_SIZE64) | |
d8045f23 | 3763 | || ! SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c AJ |
3764 | || (ELIMINATE_COPY_RELOCS |
3765 | && !info->shared | |
c434dee6 AJ |
3766 | && h != NULL |
3767 | && h->dynindx != -1 | |
f5385ebf AM |
3768 | && !h->non_got_ref |
3769 | && ((h->def_dynamic | |
3770 | && !h->def_regular) | |
c434dee6 | 3771 | || h->root.type == bfd_link_hash_undefweak |
0f88be7a | 3772 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
3773 | { |
3774 | Elf_Internal_Rela outrel; | |
b34976b6 | 3775 | bfd_boolean skip, relocate; |
c434dee6 | 3776 | asection *sreloc; |
70256ad8 AJ |
3777 | |
3778 | /* When generating a shared object, these relocations | |
3779 | are copied into the output file to be resolved at run | |
407443a3 | 3780 | time. */ |
b34976b6 AM |
3781 | skip = FALSE; |
3782 | relocate = FALSE; | |
70256ad8 | 3783 | |
c629eae0 JJ |
3784 | outrel.r_offset = |
3785 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 3786 | rel->r_offset); |
c629eae0 | 3787 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 3788 | skip = TRUE; |
0fb19cbc | 3789 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 3790 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
3791 | |
3792 | outrel.r_offset += (input_section->output_section->vma | |
3793 | + input_section->output_offset); | |
3794 | ||
3795 | if (skip) | |
0bb2d96a | 3796 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 3797 | |
fd8ab9e5 AJ |
3798 | /* h->dynindx may be -1 if this symbol was marked to |
3799 | become local. */ | |
3800 | else if (h != NULL | |
c434dee6 | 3801 | && h->dynindx != -1 |
d8045f23 NC |
3802 | && (IS_X86_64_PCREL_TYPE (r_type) |
3803 | || ! info->shared | |
3804 | || ! SYMBOLIC_BIND (info, h) | |
3805 | || ! h->def_regular)) | |
70256ad8 | 3806 | { |
351f65ca | 3807 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 3808 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
3809 | } |
3810 | else | |
3811 | { | |
c434dee6 | 3812 | /* This symbol is local, or marked to become local. */ |
248775ba | 3813 | if (r_type == htab->pointer_r_type) |
607c0e09 | 3814 | { |
b34976b6 | 3815 | relocate = TRUE; |
351f65ca | 3816 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
3817 | outrel.r_addend = relocation + rel->r_addend; |
3818 | } | |
64d25c44 L |
3819 | else if (r_type == R_X86_64_64 |
3820 | && !ABI_64_P (output_bfd)) | |
3821 | { | |
3822 | relocate = TRUE; | |
3823 | outrel.r_info = htab->r_info (0, | |
3824 | R_X86_64_RELATIVE64); | |
3825 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
3826 | /* Check addend overflow. */ |
3827 | if ((outrel.r_addend & 0x80000000) | |
3828 | != (rel->r_addend & 0x80000000)) | |
3829 | { | |
3830 | const char *name; | |
268a8d3a | 3831 | int addend = rel->r_addend; |
8cf0d2dd L |
3832 | if (h && h->root.root.string) |
3833 | name = h->root.root.string; | |
3834 | else | |
3835 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3836 | sym, NULL); | |
6f2c9068 L |
3837 | if (addend < 0) |
3838 | (*_bfd_error_handler) | |
268a8d3a | 3839 | (_("%B: addend -0x%x in relocation %s against " |
6f2c9068 L |
3840 | "symbol `%s' at 0x%lx in section `%A' is " |
3841 | "out of range"), | |
3842 | input_bfd, input_section, addend, | |
3843 | x86_64_elf_howto_table[r_type].name, | |
3844 | name, (unsigned long) rel->r_offset); | |
3845 | else | |
3846 | (*_bfd_error_handler) | |
268a8d3a | 3847 | (_("%B: addend 0x%x in relocation %s against " |
6f2c9068 L |
3848 | "symbol `%s' at 0x%lx in section `%A' is " |
3849 | "out of range"), | |
3850 | input_bfd, input_section, addend, | |
3851 | x86_64_elf_howto_table[r_type].name, | |
3852 | name, (unsigned long) rel->r_offset); | |
8cf0d2dd L |
3853 | bfd_set_error (bfd_error_bad_value); |
3854 | return FALSE; | |
3855 | } | |
64d25c44 | 3856 | } |
607c0e09 AS |
3857 | else |
3858 | { | |
3859 | long sindx; | |
3860 | ||
8517fae7 | 3861 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
3862 | sindx = 0; |
3863 | else if (sec == NULL || sec->owner == NULL) | |
3864 | { | |
3865 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3866 | return FALSE; |
607c0e09 AS |
3867 | } |
3868 | else | |
3869 | { | |
3870 | asection *osec; | |
3871 | ||
74541ad4 AM |
3872 | /* We are turning this relocation into one |
3873 | against a section symbol. It would be | |
3874 | proper to subtract the symbol's value, | |
3875 | osec->vma, from the emitted reloc addend, | |
3876 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
3877 | osec = sec->output_section; |
3878 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
3879 | if (sindx == 0) |
3880 | { | |
3881 | asection *oi = htab->elf.text_index_section; | |
3882 | sindx = elf_section_data (oi)->dynindx; | |
3883 | } | |
3884 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
3885 | } |
3886 | ||
351f65ca | 3887 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
3888 | outrel.r_addend = relocation + rel->r_addend; |
3889 | } | |
70256ad8 AJ |
3890 | } |
3891 | ||
cbe950e9 | 3892 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 3893 | |
62d78908 L |
3894 | if (sreloc == NULL || sreloc->contents == NULL) |
3895 | { | |
3896 | r = bfd_reloc_notsupported; | |
3897 | goto check_relocation_error; | |
3898 | } | |
c434dee6 | 3899 | |
351f65ca | 3900 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
3901 | |
3902 | /* If this reloc is against an external symbol, we do | |
3903 | not want to fiddle with the addend. Otherwise, we | |
3904 | need to include the symbol value so that it becomes | |
3905 | an addend for the dynamic reloc. */ | |
0f88be7a | 3906 | if (! relocate) |
70256ad8 AJ |
3907 | continue; |
3908 | } | |
3909 | ||
3910 | break; | |
3911 | ||
bffbf940 | 3912 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
3913 | case R_X86_64_GOTPC32_TLSDESC: |
3914 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 3915 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
3916 | tls_type = GOT_UNKNOWN; |
3917 | if (h == NULL && local_got_offsets) | |
351f65ca | 3918 | tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 3919 | else if (h != NULL) |
351f65ca | 3920 | tls_type = elf_x86_64_hash_entry (h)->tls_type; |
142411ca | 3921 | |
351f65ca L |
3922 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3923 | input_section, contents, | |
3924 | symtab_hdr, sym_hashes, | |
3925 | &r_type, tls_type, rel, | |
3926 | relend, h, r_symndx)) | |
534a31f6 | 3927 | return FALSE; |
bffbf940 JJ |
3928 | |
3929 | if (r_type == R_X86_64_TPOFF32) | |
3930 | { | |
142411ca L |
3931 | bfd_vma roff = rel->r_offset; |
3932 | ||
bffbf940 | 3933 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 3934 | |
351f65ca | 3935 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 3936 | { |
52bc799a | 3937 | /* GD->LE transition. For 64bit, change |
abcf1d52 | 3938 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
a3fadc9a | 3939 | .word 0x6666; rex64; call __tls_get_addr |
52bc799a | 3940 | into: |
bffbf940 | 3941 | movq %fs:0, %rax |
52bc799a L |
3942 | leaq foo@tpoff(%rax), %rax |
3943 | For 32bit, change | |
3944 | leaq foo@tlsgd(%rip), %rdi | |
3945 | .word 0x6666; rex64; call __tls_get_addr | |
3946 | into: | |
3947 | movl %fs:0, %eax | |
bffbf940 | 3948 | leaq foo@tpoff(%rax), %rax */ |
52bc799a L |
3949 | if (ABI_64_P (output_bfd)) |
3950 | memcpy (contents + roff - 4, | |
3951 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3952 | 16); | |
3953 | else | |
3954 | memcpy (contents + roff - 3, | |
3955 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3956 | 15); | |
eb4ff4d6 | 3957 | bfd_put_32 (output_bfd, |
351f65ca | 3958 | elf_x86_64_tpoff (info, relocation), |
142411ca | 3959 | contents + roff + 8); |
a3fadc9a | 3960 | /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ |
bffbf940 JJ |
3961 | rel++; |
3962 | continue; | |
3963 | } | |
351f65ca | 3964 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
3965 | { |
3966 | /* GDesc -> LE transition. | |
3967 | It's originally something like: | |
3968 | leaq x@tlsdesc(%rip), %rax | |
3969 | ||
3970 | Change it to: | |
c9736ba0 | 3971 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 3972 | |
c9736ba0 | 3973 | unsigned int val, type; |
67a4f2b7 | 3974 | |
67a4f2b7 | 3975 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 3976 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
3977 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
3978 | contents + roff - 3); | |
3979 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
3980 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3981 | contents + roff - 1); | |
eb4ff4d6 | 3982 | bfd_put_32 (output_bfd, |
351f65ca | 3983 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
3984 | contents + roff); |
3985 | continue; | |
3986 | } | |
351f65ca | 3987 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
3988 | { |
3989 | /* GDesc -> LE transition. | |
3990 | It's originally: | |
3991 | call *(%rax) | |
3992 | Turn it into: | |
142411ca | 3993 | xchg %ax,%ax. */ |
10efb593 | 3994 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
3995 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3996 | continue; | |
3997 | } | |
351f65ca | 3998 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 3999 | { |
bffbf940 JJ |
4000 | /* IE->LE transition: |
4001 | Originally it can be one of: | |
4002 | movq foo@gottpoff(%rip), %reg | |
4003 | addq foo@gottpoff(%rip), %reg | |
4004 | We change it into: | |
4005 | movq $foo, %reg | |
4006 | leaq foo(%reg), %reg | |
4007 | addq $foo, %reg. */ | |
142411ca L |
4008 | |
4009 | unsigned int val, type, reg; | |
4010 | ||
4011 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
4012 | type = bfd_get_8 (input_bfd, contents + roff - 2); | |
4013 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 4014 | reg >>= 3; |
bffbf940 JJ |
4015 | if (type == 0x8b) |
4016 | { | |
4017 | /* movq */ | |
4018 | if (val == 0x4c) | |
4019 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 4020 | contents + roff - 3); |
4a4c5f25 L |
4021 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4022 | bfd_put_8 (output_bfd, 0x41, | |
4023 | contents + roff - 3); | |
bffbf940 | 4024 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 4025 | contents + roff - 2); |
bffbf940 | 4026 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 4027 | contents + roff - 1); |
bffbf940 JJ |
4028 | } |
4029 | else if (reg == 4) | |
4030 | { | |
4031 | /* addq -> addq - addressing with %rsp/%r12 is | |
4032 | special */ | |
4033 | if (val == 0x4c) | |
4034 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 4035 | contents + roff - 3); |
4a4c5f25 L |
4036 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4037 | bfd_put_8 (output_bfd, 0x41, | |
4038 | contents + roff - 3); | |
bffbf940 | 4039 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 4040 | contents + roff - 2); |
bffbf940 | 4041 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 4042 | contents + roff - 1); |
bffbf940 JJ |
4043 | } |
4044 | else | |
4045 | { | |
4046 | /* addq -> leaq */ | |
4047 | if (val == 0x4c) | |
4048 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 4049 | contents + roff - 3); |
4a4c5f25 L |
4050 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4051 | bfd_put_8 (output_bfd, 0x45, | |
4052 | contents + roff - 3); | |
bffbf940 | 4053 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 4054 | contents + roff - 2); |
bffbf940 | 4055 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 4056 | contents + roff - 1); |
bffbf940 | 4057 | } |
eb4ff4d6 | 4058 | bfd_put_32 (output_bfd, |
351f65ca | 4059 | elf_x86_64_tpoff (info, relocation), |
142411ca | 4060 | contents + roff); |
bffbf940 JJ |
4061 | continue; |
4062 | } | |
142411ca L |
4063 | else |
4064 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
4065 | } |
4066 | ||
6de2ae4a | 4067 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
4068 | abort (); |
4069 | ||
4070 | if (h != NULL) | |
67a4f2b7 AO |
4071 | { |
4072 | off = h->got.offset; | |
351f65ca | 4073 | offplt = elf_x86_64_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 4074 | } |
bffbf940 JJ |
4075 | else |
4076 | { | |
4077 | if (local_got_offsets == NULL) | |
4078 | abort (); | |
4079 | ||
4080 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 4081 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
4082 | } |
4083 | ||
4084 | if ((off & 1) != 0) | |
4085 | off &= ~1; | |
26e41594 | 4086 | else |
bffbf940 JJ |
4087 | { |
4088 | Elf_Internal_Rela outrel; | |
bffbf940 | 4089 | int dr_type, indx; |
67a4f2b7 | 4090 | asection *sreloc; |
bffbf940 | 4091 | |
6de2ae4a | 4092 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
4093 | abort (); |
4094 | ||
67a4f2b7 AO |
4095 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4096 | ||
4097 | if (GOT_TLS_GDESC_P (tls_type)) | |
4098 | { | |
351f65ca | 4099 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 4100 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
4101 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
4102 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4103 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4104 | + offplt |
4105 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4106 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4107 | if (indx == 0) |
351f65ca | 4108 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
67a4f2b7 AO |
4109 | else |
4110 | outrel.r_addend = 0; | |
351f65ca | 4111 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
4112 | } |
4113 | ||
6de2ae4a | 4114 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4115 | |
6de2ae4a L |
4116 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4117 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 4118 | |
67a4f2b7 | 4119 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 4120 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
4121 | else if (GOT_TLS_GDESC_P (tls_type)) |
4122 | goto dr_done; | |
bffbf940 JJ |
4123 | else |
4124 | dr_type = R_X86_64_TPOFF64; | |
4125 | ||
6de2ae4a | 4126 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 4127 | outrel.r_addend = 0; |
67a4f2b7 AO |
4128 | if ((dr_type == R_X86_64_TPOFF64 |
4129 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
351f65ca L |
4130 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
4131 | outrel.r_info = htab->r_info (indx, dr_type); | |
bffbf940 | 4132 | |
351f65ca | 4133 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 4134 | |
67a4f2b7 | 4135 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
4136 | { |
4137 | if (indx == 0) | |
4138 | { | |
d40d037c | 4139 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 4140 | bfd_put_64 (output_bfd, |
351f65ca | 4141 | relocation - elf_x86_64_dtpoff_base (info), |
6de2ae4a | 4142 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
4143 | } |
4144 | else | |
4145 | { | |
4146 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 4147 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 4148 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
4149 | R_X86_64_DTPOFF64); |
4150 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 4151 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 4152 | &outrel); |
bffbf940 JJ |
4153 | } |
4154 | } | |
4155 | ||
67a4f2b7 | 4156 | dr_done: |
bffbf940 JJ |
4157 | if (h != NULL) |
4158 | h->got.offset |= 1; | |
4159 | else | |
4160 | local_got_offsets[r_symndx] |= 1; | |
4161 | } | |
4162 | ||
67a4f2b7 AO |
4163 | if (off >= (bfd_vma) -2 |
4164 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 4165 | abort (); |
351f65ca | 4166 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 4167 | { |
67a4f2b7 AO |
4168 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
4169 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
4170 | relocation = htab->elf.sgotplt->output_section->vma |
4171 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4172 | + offplt + htab->sgotplt_jump_table_size; |
4173 | else | |
6de2ae4a L |
4174 | relocation = htab->elf.sgot->output_section->vma |
4175 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 4176 | unresolved_reloc = FALSE; |
bffbf940 | 4177 | } |
142411ca | 4178 | else |
67a4f2b7 | 4179 | { |
142411ca | 4180 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 4181 | |
351f65ca | 4182 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 4183 | { |
52bc799a | 4184 | /* GD->IE transition. For 64bit, change |
142411ca L |
4185 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
4186 | .word 0x6666; rex64; call __tls_get_addr@plt | |
52bc799a | 4187 | into: |
142411ca | 4188 | movq %fs:0, %rax |
52bc799a L |
4189 | addq foo@gottpoff(%rip), %rax |
4190 | For 32bit, change | |
4191 | leaq foo@tlsgd(%rip), %rdi | |
4192 | .word 0x6666; rex64; call __tls_get_addr@plt | |
4193 | into: | |
4194 | movl %fs:0, %eax | |
142411ca | 4195 | addq foo@gottpoff(%rip), %rax */ |
52bc799a L |
4196 | if (ABI_64_P (output_bfd)) |
4197 | memcpy (contents + roff - 4, | |
4198 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
4199 | 16); | |
4200 | else | |
4201 | memcpy (contents + roff - 3, | |
4202 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
4203 | 15); | |
142411ca | 4204 | |
6de2ae4a L |
4205 | relocation = (htab->elf.sgot->output_section->vma |
4206 | + htab->elf.sgot->output_offset + off | |
142411ca L |
4207 | - roff |
4208 | - input_section->output_section->vma | |
4209 | - input_section->output_offset | |
4210 | - 12); | |
4211 | bfd_put_32 (output_bfd, relocation, | |
4212 | contents + roff + 8); | |
4213 | /* Skip R_X86_64_PLT32. */ | |
4214 | rel++; | |
4215 | continue; | |
4216 | } | |
351f65ca | 4217 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
4218 | { |
4219 | /* GDesc -> IE transition. | |
4220 | It's originally something like: | |
4221 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 4222 | |
142411ca | 4223 | Change it to: |
c9736ba0 | 4224 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 4225 | |
142411ca L |
4226 | /* Now modify the instruction as appropriate. To |
4227 | turn a leaq into a movq in the form we use it, it | |
4228 | suffices to change the second byte from 0x8d to | |
4229 | 0x8b. */ | |
4230 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
4231 | ||
4232 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4233 | htab->elf.sgot->output_section->vma |
4234 | + htab->elf.sgot->output_offset + off | |
142411ca L |
4235 | - rel->r_offset |
4236 | - input_section->output_section->vma | |
4237 | - input_section->output_offset | |
4238 | - 4, | |
4239 | contents + roff); | |
4240 | continue; | |
4241 | } | |
351f65ca | 4242 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
4243 | { |
4244 | /* GDesc -> IE transition. | |
4245 | It's originally: | |
4246 | call *(%rax) | |
4247 | ||
4248 | Change it to: | |
c9736ba0 | 4249 | xchg %ax, %ax. */ |
142411ca | 4250 | |
142411ca L |
4251 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
4252 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
4253 | continue; | |
4254 | } | |
4255 | else | |
4256 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 4257 | } |
bffbf940 JJ |
4258 | break; |
4259 | ||
4260 | case R_X86_64_TLSLD: | |
351f65ca L |
4261 | if (! elf_x86_64_tls_transition (info, input_bfd, |
4262 | input_section, contents, | |
4263 | symtab_hdr, sym_hashes, | |
4264 | &r_type, GOT_UNKNOWN, | |
4265 | rel, relend, h, r_symndx)) | |
142411ca | 4266 | return FALSE; |
a3fadc9a | 4267 | |
142411ca L |
4268 | if (r_type != R_X86_64_TLSLD) |
4269 | { | |
bffbf940 | 4270 | /* LD->LE transition: |
a3fadc9a | 4271 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr. |
52bc799a L |
4272 | For 64bit, we change it into: |
4273 | .word 0x6666; .byte 0x66; movq %fs:0, %rax. | |
4274 | For 32bit, we change it into: | |
4275 | nopl 0x0(%rax); movl %fs:0, %eax. */ | |
142411ca L |
4276 | |
4277 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
52bc799a L |
4278 | if (ABI_64_P (output_bfd)) |
4279 | memcpy (contents + rel->r_offset - 3, | |
4280 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
4281 | else | |
4282 | memcpy (contents + rel->r_offset - 3, | |
4283 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
a3fadc9a | 4284 | /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ |
bffbf940 JJ |
4285 | rel++; |
4286 | continue; | |
4287 | } | |
4288 | ||
6de2ae4a | 4289 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
4290 | abort (); |
4291 | ||
4292 | off = htab->tls_ld_got.offset; | |
4293 | if (off & 1) | |
4294 | off &= ~1; | |
4295 | else | |
4296 | { | |
4297 | Elf_Internal_Rela outrel; | |
bffbf940 | 4298 | |
6de2ae4a | 4299 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
4300 | abort (); |
4301 | ||
6de2ae4a L |
4302 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4303 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
4304 | |
4305 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 4306 | htab->elf.sgot->contents + off); |
bffbf940 | 4307 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 4308 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 4309 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 4310 | outrel.r_addend = 0; |
351f65ca | 4311 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 4312 | &outrel); |
bffbf940 JJ |
4313 | htab->tls_ld_got.offset |= 1; |
4314 | } | |
6de2ae4a L |
4315 | relocation = htab->elf.sgot->output_section->vma |
4316 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 4317 | unresolved_reloc = FALSE; |
bffbf940 JJ |
4318 | break; |
4319 | ||
4320 | case R_X86_64_DTPOFF32: | |
1d85728f | 4321 | if (!info->executable|| (input_section->flags & SEC_CODE) == 0) |
351f65ca | 4322 | relocation -= elf_x86_64_dtpoff_base (info); |
bffbf940 | 4323 | else |
351f65ca | 4324 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
4325 | break; |
4326 | ||
4327 | case R_X86_64_TPOFF32: | |
6769d501 | 4328 | case R_X86_64_TPOFF64: |
9b769489 | 4329 | BFD_ASSERT (info->executable); |
351f65ca | 4330 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
4331 | break; |
4332 | ||
70256ad8 AJ |
4333 | default: |
4334 | break; | |
4335 | } | |
8d88c4ca | 4336 | |
239e1f3a AM |
4337 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
4338 | because such sections are not SEC_ALLOC and thus ld.so will | |
4339 | not process them. */ | |
c434dee6 | 4340 | if (unresolved_reloc |
239e1f3a | 4341 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
4342 | && h->def_dynamic) |
4343 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
4344 | rel->r_offset) != (bfd_vma) -1) | |
a040981f L |
4345 | { |
4346 | (*_bfd_error_handler) | |
4347 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), | |
4348 | input_bfd, | |
4349 | input_section, | |
4350 | (long) rel->r_offset, | |
4351 | howto->name, | |
4352 | h->root.root.string); | |
4353 | return FALSE; | |
4354 | } | |
c434dee6 | 4355 | |
cbe950e9 | 4356 | do_relocation: |
8d88c4ca | 4357 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
4358 | contents, rel->r_offset, |
4359 | relocation, rel->r_addend); | |
8d88c4ca | 4360 | |
62d78908 | 4361 | check_relocation_error: |
8d88c4ca | 4362 | if (r != bfd_reloc_ok) |
8da6118f | 4363 | { |
c434dee6 AJ |
4364 | const char *name; |
4365 | ||
4366 | if (h != NULL) | |
4367 | name = h->root.root.string; | |
4368 | else | |
8da6118f | 4369 | { |
c434dee6 AJ |
4370 | name = bfd_elf_string_from_elf_section (input_bfd, |
4371 | symtab_hdr->sh_link, | |
4372 | sym->st_name); | |
4373 | if (name == NULL) | |
b34976b6 | 4374 | return FALSE; |
c434dee6 AJ |
4375 | if (*name == '\0') |
4376 | name = bfd_section_name (input_bfd, sec); | |
4377 | } | |
4378 | ||
4379 | if (r == bfd_reloc_overflow) | |
4380 | { | |
c434dee6 | 4381 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
4382 | (info, (h ? &h->root : NULL), name, howto->name, |
4383 | (bfd_vma) 0, input_bfd, input_section, | |
4384 | rel->r_offset))) | |
b34976b6 | 4385 | return FALSE; |
c434dee6 AJ |
4386 | } |
4387 | else | |
4388 | { | |
4389 | (*_bfd_error_handler) | |
bb95161d | 4390 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
d003868e | 4391 | input_bfd, input_section, |
c434dee6 | 4392 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 4393 | return FALSE; |
8da6118f KH |
4394 | } |
4395 | } | |
8d88c4ca | 4396 | } |
70256ad8 | 4397 | |
b34976b6 | 4398 | return TRUE; |
70256ad8 AJ |
4399 | } |
4400 | ||
4401 | /* Finish up dynamic symbol handling. We set the contents of various | |
4402 | dynamic sections here. */ | |
4403 | ||
b34976b6 | 4404 | static bfd_boolean |
351f65ca L |
4405 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
4406 | struct bfd_link_info *info, | |
4407 | struct elf_link_hash_entry *h, | |
220cf809 | 4408 | Elf_Internal_Sym *sym ATTRIBUTE_UNUSED) |
70256ad8 | 4409 | { |
351f65ca | 4410 | struct elf_x86_64_link_hash_table *htab; |
eed180f8 RM |
4411 | const struct elf_x86_64_backend_data *const abed |
4412 | = get_elf_x86_64_backend_data (output_bfd); | |
70256ad8 | 4413 | |
351f65ca | 4414 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4415 | if (htab == NULL) |
4416 | return FALSE; | |
70256ad8 AJ |
4417 | |
4418 | if (h->plt.offset != (bfd_vma) -1) | |
4419 | { | |
70256ad8 AJ |
4420 | bfd_vma plt_index; |
4421 | bfd_vma got_offset; | |
4422 | Elf_Internal_Rela rela; | |
947216bf | 4423 | bfd_byte *loc; |
cbe950e9 | 4424 | asection *plt, *gotplt, *relplt; |
351f65ca | 4425 | const struct elf_backend_data *bed; |
cbe950e9 L |
4426 | |
4427 | /* When building a static executable, use .iplt, .igot.plt and | |
4428 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 4429 | if (htab->elf.splt != NULL) |
cbe950e9 | 4430 | { |
6de2ae4a L |
4431 | plt = htab->elf.splt; |
4432 | gotplt = htab->elf.sgotplt; | |
4433 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
4434 | } |
4435 | else | |
4436 | { | |
6de2ae4a L |
4437 | plt = htab->elf.iplt; |
4438 | gotplt = htab->elf.igotplt; | |
4439 | relplt = htab->elf.irelplt; | |
cbe950e9 | 4440 | } |
70256ad8 AJ |
4441 | |
4442 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 4443 | it up. */ |
cbe950e9 L |
4444 | if ((h->dynindx == -1 |
4445 | && !((h->forced_local || info->executable) | |
4446 | && h->def_regular | |
4447 | && h->type == STT_GNU_IFUNC)) | |
4448 | || plt == NULL | |
4449 | || gotplt == NULL | |
4450 | || relplt == NULL) | |
cec7f46a | 4451 | abort (); |
70256ad8 AJ |
4452 | |
4453 | /* Get the index in the procedure linkage table which | |
4454 | corresponds to this symbol. This is the index of this symbol | |
4455 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 4456 | first entry in the procedure linkage table is reserved. |
6bbec505 | 4457 | |
cbe950e9 | 4458 | Get the offset into the .got table of the entry that |
407443a3 | 4459 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
4460 | bytes. The first three are reserved for the dynamic linker. |
4461 | ||
4462 | For static executables, we don't reserve anything. */ | |
4463 | ||
6de2ae4a | 4464 | if (plt == htab->elf.splt) |
cbe950e9 | 4465 | { |
eed180f8 | 4466 | got_offset = h->plt.offset / abed->plt_entry_size - 1; |
e1f98742 | 4467 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
4468 | } |
4469 | else | |
4470 | { | |
eed180f8 | 4471 | got_offset = h->plt.offset / abed->plt_entry_size; |
e1f98742 | 4472 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 4473 | } |
70256ad8 AJ |
4474 | |
4475 | /* Fill in the entry in the procedure linkage table. */ | |
eed180f8 RM |
4476 | memcpy (plt->contents + h->plt.offset, abed->plt_entry, |
4477 | abed->plt_entry_size); | |
4478 | ||
4479 | /* Insert the relocation positions of the plt section. */ | |
4480 | ||
4481 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
4482 | subtracting the size of that instruction. */ | |
653165cc | 4483 | bfd_put_32 (output_bfd, |
eed180f8 RM |
4484 | (gotplt->output_section->vma |
4485 | + gotplt->output_offset | |
4486 | + got_offset | |
4487 | - plt->output_section->vma | |
4488 | - plt->output_offset | |
4489 | - h->plt.offset | |
4490 | - abed->plt_got_insn_size), | |
4491 | plt->contents + h->plt.offset + abed->plt_got_offset); | |
cbe950e9 | 4492 | |
653165cc | 4493 | /* Fill in the entry in the global offset table, initially this |
eed180f8 | 4494 | points to the second part of the PLT entry. */ |
cbe950e9 L |
4495 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4496 | + plt->output_offset | |
eed180f8 | 4497 | + h->plt.offset + abed->plt_lazy_offset), |
cbe950e9 | 4498 | gotplt->contents + got_offset); |
70256ad8 AJ |
4499 | |
4500 | /* Fill in the entry in the .rela.plt section. */ | |
cbe950e9 L |
4501 | rela.r_offset = (gotplt->output_section->vma |
4502 | + gotplt->output_offset | |
70256ad8 | 4503 | + got_offset); |
cbe950e9 L |
4504 | if (h->dynindx == -1 |
4505 | || ((info->executable | |
4506 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
4507 | && h->def_regular | |
4508 | && h->type == STT_GNU_IFUNC)) | |
4509 | { | |
4510 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
4511 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
351f65ca | 4512 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
cbe950e9 L |
4513 | rela.r_addend = (h->root.u.def.value |
4514 | + h->root.u.def.section->output_section->vma | |
4515 | + h->root.u.def.section->output_offset); | |
e1f98742 L |
4516 | /* R_X86_64_IRELATIVE comes last. */ |
4517 | plt_index = htab->next_irelative_index--; | |
cbe950e9 L |
4518 | } |
4519 | else | |
4520 | { | |
351f65ca | 4521 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); |
cbe950e9 | 4522 | rela.r_addend = 0; |
e1f98742 L |
4523 | plt_index = htab->next_jump_slot_index++; |
4524 | } | |
4525 | ||
4526 | /* Don't fill PLT entry for static executables. */ | |
4527 | if (plt == htab->elf.splt) | |
4528 | { | |
4529 | /* Put relocation index. */ | |
4530 | bfd_put_32 (output_bfd, plt_index, | |
eed180f8 | 4531 | plt->contents + h->plt.offset + abed->plt_reloc_offset); |
e1f98742 | 4532 | /* Put offset for jmp .PLT0. */ |
eed180f8 RM |
4533 | bfd_put_32 (output_bfd, - (h->plt.offset + abed->plt_plt_insn_end), |
4534 | plt->contents + h->plt.offset + abed->plt_plt_offset); | |
cbe950e9 | 4535 | } |
351f65ca L |
4536 | |
4537 | bed = get_elf_backend_data (output_bfd); | |
4538 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
82e96e07 | 4539 | bed->s->swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 | 4540 | |
f5385ebf | 4541 | if (!h->def_regular) |
70256ad8 AJ |
4542 | { |
4543 | /* Mark the symbol as undefined, rather than as defined in | |
47a9f7b3 JJ |
4544 | the .plt section. Leave the value if there were any |
4545 | relocations where pointer equality matters (this is a clue | |
c434dee6 AJ |
4546 | for the dynamic linker, to make function pointer |
4547 | comparisons work between an application and shared | |
47a9f7b3 JJ |
4548 | library), otherwise set it to zero. If a function is only |
4549 | called from a binary, there is no need to slow down | |
4550 | shared libraries because of that. */ | |
70256ad8 | 4551 | sym->st_shndx = SHN_UNDEF; |
f5385ebf | 4552 | if (!h->pointer_equality_needed) |
47a9f7b3 | 4553 | sym->st_value = 0; |
70256ad8 AJ |
4554 | } |
4555 | } | |
4556 | ||
bffbf940 | 4557 | if (h->got.offset != (bfd_vma) -1 |
351f65ca L |
4558 | && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type) |
4559 | && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE) | |
053579d7 | 4560 | { |
053579d7 AJ |
4561 | Elf_Internal_Rela rela; |
4562 | ||
4563 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 4564 | up. */ |
6de2ae4a | 4565 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 4566 | abort (); |
053579d7 | 4567 | |
6de2ae4a L |
4568 | rela.r_offset = (htab->elf.sgot->output_section->vma |
4569 | + htab->elf.sgot->output_offset | |
dc810e39 | 4570 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
4571 | |
4572 | /* If this is a static link, or it is a -Bsymbolic link and the | |
4573 | symbol is defined locally or was forced to be local because | |
4574 | of a version file, we just want to emit a RELATIVE reloc. | |
4575 | The entry in the global offset table will already have been | |
4576 | initialized in the relocate_section function. */ | |
710ab287 | 4577 | if (h->def_regular |
0018b0a3 L |
4578 | && h->type == STT_GNU_IFUNC) |
4579 | { | |
710ab287 L |
4580 | if (info->shared) |
4581 | { | |
4582 | /* Generate R_X86_64_GLOB_DAT. */ | |
4583 | goto do_glob_dat; | |
4584 | } | |
4585 | else | |
4586 | { | |
90d60710 L |
4587 | asection *plt; |
4588 | ||
710ab287 L |
4589 | if (!h->pointer_equality_needed) |
4590 | abort (); | |
4591 | ||
4592 | /* For non-shared object, we can't use .got.plt, which | |
4593 | contains the real function addres if we need pointer | |
4594 | equality. We load the GOT entry with the PLT entry. */ | |
90d60710 | 4595 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
4596 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4597 | + plt->output_offset | |
4598 | + h->plt.offset), | |
6de2ae4a | 4599 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
4600 | return TRUE; |
4601 | } | |
0018b0a3 L |
4602 | } |
4603 | else if (info->shared | |
4604 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
053579d7 | 4605 | { |
41bed6dd L |
4606 | if (!h->def_regular) |
4607 | return FALSE; | |
cc78d0af | 4608 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 4609 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
4610 | rela.r_addend = (h->root.u.def.value |
4611 | + h->root.u.def.section->output_section->vma | |
4612 | + h->root.u.def.section->output_offset); | |
4613 | } | |
4614 | else | |
4615 | { | |
4616 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 4617 | do_glob_dat: |
c434dee6 | 4618 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4619 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 4620 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
4621 | rela.r_addend = 0; |
4622 | } | |
4623 | ||
351f65ca | 4624 | elf_append_rela (output_bfd, htab->elf.srelgot, &rela); |
053579d7 AJ |
4625 | } |
4626 | ||
f5385ebf | 4627 | if (h->needs_copy) |
70256ad8 | 4628 | { |
70256ad8 AJ |
4629 | Elf_Internal_Rela rela; |
4630 | ||
4631 | /* This symbol needs a copy reloc. Set it up. */ | |
4632 | ||
c434dee6 AJ |
4633 | if (h->dynindx == -1 |
4634 | || (h->root.type != bfd_link_hash_defined | |
4635 | && h->root.type != bfd_link_hash_defweak) | |
4636 | || htab->srelbss == NULL) | |
4637 | abort (); | |
70256ad8 AJ |
4638 | |
4639 | rela.r_offset = (h->root.u.def.value | |
4640 | + h->root.u.def.section->output_section->vma | |
4641 | + h->root.u.def.section->output_offset); | |
351f65ca | 4642 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 4643 | rela.r_addend = 0; |
351f65ca | 4644 | elf_append_rela (output_bfd, htab->srelbss, &rela); |
70256ad8 AJ |
4645 | } |
4646 | ||
b34976b6 | 4647 | return TRUE; |
70256ad8 AJ |
4648 | } |
4649 | ||
c25bc9fc L |
4650 | /* Finish up local dynamic symbol handling. We set the contents of |
4651 | various dynamic sections here. */ | |
4652 | ||
4653 | static bfd_boolean | |
351f65ca | 4654 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
4655 | { |
4656 | struct elf_link_hash_entry *h | |
4657 | = (struct elf_link_hash_entry *) *slot; | |
4658 | struct bfd_link_info *info | |
eed180f8 | 4659 | = (struct bfd_link_info *) inf; |
c25bc9fc | 4660 | |
351f65ca | 4661 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
c25bc9fc L |
4662 | info, h, NULL); |
4663 | } | |
4664 | ||
c434dee6 AJ |
4665 | /* Used to decide how to sort relocs in an optimal manner for the |
4666 | dynamic linker, before writing them out. */ | |
4667 | ||
4668 | static enum elf_reloc_type_class | |
351f65ca | 4669 | elf_x86_64_reloc_type_class (const Elf_Internal_Rela *rela) |
c434dee6 | 4670 | { |
351f65ca | 4671 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 AJ |
4672 | { |
4673 | case R_X86_64_RELATIVE: | |
1da80baa | 4674 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
4675 | return reloc_class_relative; |
4676 | case R_X86_64_JUMP_SLOT: | |
4677 | return reloc_class_plt; | |
4678 | case R_X86_64_COPY: | |
4679 | return reloc_class_copy; | |
4680 | default: | |
4681 | return reloc_class_normal; | |
4682 | } | |
4683 | } | |
4684 | ||
70256ad8 AJ |
4685 | /* Finish up the dynamic sections. */ |
4686 | ||
b34976b6 | 4687 | static bfd_boolean |
351f65ca L |
4688 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
4689 | struct bfd_link_info *info) | |
70256ad8 | 4690 | { |
351f65ca | 4691 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
4692 | bfd *dynobj; |
4693 | asection *sdyn; | |
eed180f8 RM |
4694 | const struct elf_x86_64_backend_data *const abed |
4695 | = get_elf_x86_64_backend_data (output_bfd); | |
70256ad8 | 4696 | |
351f65ca | 4697 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4698 | if (htab == NULL) |
4699 | return FALSE; | |
4700 | ||
c434dee6 | 4701 | dynobj = htab->elf.dynobj; |
3d4d4302 | 4702 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
70256ad8 | 4703 | |
c434dee6 | 4704 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 4705 | { |
82e96e07 L |
4706 | bfd_byte *dyncon, *dynconend; |
4707 | const struct elf_backend_data *bed; | |
4708 | bfd_size_type sizeof_dyn; | |
70256ad8 | 4709 | |
6de2ae4a | 4710 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 4711 | abort (); |
70256ad8 | 4712 | |
82e96e07 L |
4713 | bed = get_elf_backend_data (dynobj); |
4714 | sizeof_dyn = bed->s->sizeof_dyn; | |
4715 | dyncon = sdyn->contents; | |
4716 | dynconend = sdyn->contents + sdyn->size; | |
4717 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
4718 | { |
4719 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
4720 | asection *s; |
4721 | ||
82e96e07 | 4722 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
4723 | |
4724 | switch (dyn.d_tag) | |
4725 | { | |
4726 | default: | |
053579d7 | 4727 | continue; |
70256ad8 AJ |
4728 | |
4729 | case DT_PLTGOT: | |
6de2ae4a | 4730 | s = htab->elf.sgotplt; |
8c37241b | 4731 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 4732 | break; |
70256ad8 AJ |
4733 | |
4734 | case DT_JMPREL: | |
6de2ae4a | 4735 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 4736 | break; |
70256ad8 | 4737 | |
c434dee6 | 4738 | case DT_PLTRELSZ: |
6de2ae4a | 4739 | s = htab->elf.srelplt->output_section; |
eea6121a | 4740 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
4741 | break; |
4742 | ||
4743 | case DT_RELASZ: | |
c434dee6 AJ |
4744 | /* The procedure linkage table relocs (DT_JMPREL) should |
4745 | not be included in the overall relocs (DT_RELA). | |
4746 | Therefore, we override the DT_RELASZ entry here to | |
4747 | make it not include the JMPREL relocs. Since the | |
4748 | linker script arranges for .rela.plt to follow all | |
4749 | other relocation sections, we don't have to worry | |
4750 | about changing the DT_RELA entry. */ | |
6de2ae4a | 4751 | if (htab->elf.srelplt != NULL) |
70256ad8 | 4752 | { |
6de2ae4a | 4753 | s = htab->elf.srelplt->output_section; |
eea6121a | 4754 | dyn.d_un.d_val -= s->size; |
70256ad8 AJ |
4755 | } |
4756 | break; | |
67a4f2b7 AO |
4757 | |
4758 | case DT_TLSDESC_PLT: | |
6de2ae4a | 4759 | s = htab->elf.splt; |
67a4f2b7 AO |
4760 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
4761 | + htab->tlsdesc_plt; | |
4762 | break; | |
4763 | ||
4764 | case DT_TLSDESC_GOT: | |
6de2ae4a | 4765 | s = htab->elf.sgot; |
67a4f2b7 AO |
4766 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
4767 | + htab->tlsdesc_got; | |
4768 | break; | |
70256ad8 | 4769 | } |
c434dee6 | 4770 | |
82e96e07 | 4771 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
4772 | } |
4773 | ||
c434dee6 | 4774 | /* Fill in the special first entry in the procedure linkage table. */ |
6de2ae4a | 4775 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 4776 | { |
653165cc | 4777 | /* Fill in the first entry in the procedure linkage table. */ |
eed180f8 RM |
4778 | memcpy (htab->elf.splt->contents, |
4779 | abed->plt0_entry, abed->plt_entry_size); | |
653165cc AJ |
4780 | /* Add offset for pushq GOT+8(%rip), since the instruction |
4781 | uses 6 bytes subtract this value. */ | |
4782 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4783 | (htab->elf.sgotplt->output_section->vma |
4784 | + htab->elf.sgotplt->output_offset | |
653165cc | 4785 | + 8 |
6de2ae4a L |
4786 | - htab->elf.splt->output_section->vma |
4787 | - htab->elf.splt->output_offset | |
653165cc | 4788 | - 6), |
eed180f8 RM |
4789 | htab->elf.splt->contents + abed->plt0_got1_offset); |
4790 | /* Add offset for the PC-relative instruction accessing GOT+16, | |
4791 | subtracting the offset to the end of that instruction. */ | |
653165cc | 4792 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4793 | (htab->elf.sgotplt->output_section->vma |
4794 | + htab->elf.sgotplt->output_offset | |
653165cc | 4795 | + 16 |
6de2ae4a L |
4796 | - htab->elf.splt->output_section->vma |
4797 | - htab->elf.splt->output_offset | |
eed180f8 RM |
4798 | - abed->plt0_got2_insn_end), |
4799 | htab->elf.splt->contents + abed->plt0_got2_offset); | |
653165cc | 4800 | |
eed180f8 RM |
4801 | elf_section_data (htab->elf.splt->output_section) |
4802 | ->this_hdr.sh_entsize = abed->plt_entry_size; | |
67a4f2b7 AO |
4803 | |
4804 | if (htab->tlsdesc_plt) | |
4805 | { | |
4806 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6de2ae4a | 4807 | htab->elf.sgot->contents + htab->tlsdesc_got); |
67a4f2b7 | 4808 | |
6de2ae4a | 4809 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, |
eed180f8 | 4810 | abed->plt0_entry, abed->plt_entry_size); |
67a4f2b7 AO |
4811 | |
4812 | /* Add offset for pushq GOT+8(%rip), since the | |
4813 | instruction uses 6 bytes subtract this value. */ | |
4814 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4815 | (htab->elf.sgotplt->output_section->vma |
4816 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 4817 | + 8 |
6de2ae4a L |
4818 | - htab->elf.splt->output_section->vma |
4819 | - htab->elf.splt->output_offset | |
67a4f2b7 AO |
4820 | - htab->tlsdesc_plt |
4821 | - 6), | |
eed180f8 RM |
4822 | htab->elf.splt->contents |
4823 | + htab->tlsdesc_plt + abed->plt0_got1_offset); | |
4824 | /* Add offset for the PC-relative instruction accessing GOT+TDG, | |
4825 | where TGD stands for htab->tlsdesc_got, subtracting the offset | |
4826 | to the end of that instruction. */ | |
67a4f2b7 | 4827 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4828 | (htab->elf.sgot->output_section->vma |
4829 | + htab->elf.sgot->output_offset | |
67a4f2b7 | 4830 | + htab->tlsdesc_got |
6de2ae4a L |
4831 | - htab->elf.splt->output_section->vma |
4832 | - htab->elf.splt->output_offset | |
67a4f2b7 | 4833 | - htab->tlsdesc_plt |
eed180f8 RM |
4834 | - abed->plt0_got2_insn_end), |
4835 | htab->elf.splt->contents | |
4836 | + htab->tlsdesc_plt + abed->plt0_got2_offset); | |
67a4f2b7 | 4837 | } |
70256ad8 | 4838 | } |
70256ad8 AJ |
4839 | } |
4840 | ||
6de2ae4a | 4841 | if (htab->elf.sgotplt) |
70256ad8 | 4842 | { |
56d4289c L |
4843 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
4844 | { | |
4845 | (*_bfd_error_handler) | |
4846 | (_("discarded output section: `%A'"), htab->elf.sgotplt); | |
4847 | return FALSE; | |
4848 | } | |
4849 | ||
c434dee6 | 4850 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 4851 | if (htab->elf.sgotplt->size > 0) |
c434dee6 AJ |
4852 | { |
4853 | /* Set the first entry in the global offset table to the address of | |
4854 | the dynamic section. */ | |
4855 | if (sdyn == NULL) | |
6de2ae4a | 4856 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); |
c434dee6 AJ |
4857 | else |
4858 | bfd_put_64 (output_bfd, | |
4859 | sdyn->output_section->vma + sdyn->output_offset, | |
6de2ae4a | 4860 | htab->elf.sgotplt->contents); |
c434dee6 | 4861 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
6de2ae4a L |
4862 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); |
4863 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
c434dee6 | 4864 | } |
70256ad8 | 4865 | |
6de2ae4a | 4866 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = |
c434dee6 AJ |
4867 | GOT_ENTRY_SIZE; |
4868 | } | |
70256ad8 | 4869 | |
e41b3a13 | 4870 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
4871 | if (htab->plt_eh_frame != NULL |
4872 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
4873 | { |
4874 | if (htab->elf.splt != NULL | |
4875 | && htab->elf.splt->size != 0 | |
4876 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
4877 | && htab->elf.splt->output_section != NULL | |
4878 | && htab->plt_eh_frame->output_section != NULL) | |
4879 | { | |
4880 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
4881 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
4882 | + htab->plt_eh_frame->output_offset | |
4883 | + PLT_FDE_START_OFFSET; | |
4884 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
4885 | htab->plt_eh_frame->contents | |
4886 | + PLT_FDE_START_OFFSET); | |
4887 | } | |
dbaa2011 | 4888 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
4889 | { |
4890 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
4891 | htab->plt_eh_frame, | |
4892 | htab->plt_eh_frame->contents)) | |
4893 | return FALSE; | |
4894 | } | |
4895 | } | |
4896 | ||
6de2ae4a L |
4897 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
4898 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
4899 | = GOT_ENTRY_SIZE; |
4900 | ||
c25bc9fc L |
4901 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
4902 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 4903 | elf_x86_64_finish_local_dynamic_symbol, |
c25bc9fc L |
4904 | info); |
4905 | ||
b34976b6 | 4906 | return TRUE; |
8d88c4ca NC |
4907 | } |
4908 | ||
4c45e5c9 JJ |
4909 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
4910 | or (bfd_vma) -1 if it should not be included. */ | |
4911 | ||
4912 | static bfd_vma | |
351f65ca L |
4913 | elf_x86_64_plt_sym_val (bfd_vma i, const asection *plt, |
4914 | const arelent *rel ATTRIBUTE_UNUSED) | |
4c45e5c9 | 4915 | { |
eed180f8 | 4916 | return plt->vma + (i + 1) * GET_PLT_ENTRY_SIZE (plt->owner); |
4c45e5c9 | 4917 | } |
8df9fc9d | 4918 | |
d2b2c203 DJ |
4919 | /* Handle an x86-64 specific section when reading an object file. This |
4920 | is called when elfcode.h finds a section with an unknown type. */ | |
4921 | ||
4922 | static bfd_boolean | |
351f65ca | 4923 | elf_x86_64_section_from_shdr (bfd *abfd, |
6dc132d9 L |
4924 | Elf_Internal_Shdr *hdr, |
4925 | const char *name, | |
4926 | int shindex) | |
d2b2c203 DJ |
4927 | { |
4928 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
4929 | return FALSE; | |
4930 | ||
6dc132d9 | 4931 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
4932 | return FALSE; |
4933 | ||
4934 | return TRUE; | |
4935 | } | |
4936 | ||
3b22753a L |
4937 | /* Hook called by the linker routine which adds symbols from an object |
4938 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
4939 | of .bss. */ | |
4940 | ||
4941 | static bfd_boolean | |
351f65ca L |
4942 | elf_x86_64_add_symbol_hook (bfd *abfd, |
4943 | struct bfd_link_info *info, | |
4944 | Elf_Internal_Sym *sym, | |
4945 | const char **namep ATTRIBUTE_UNUSED, | |
4946 | flagword *flagsp ATTRIBUTE_UNUSED, | |
4947 | asection **secp, | |
4948 | bfd_vma *valp) | |
3b22753a L |
4949 | { |
4950 | asection *lcomm; | |
4951 | ||
4952 | switch (sym->st_shndx) | |
4953 | { | |
4954 | case SHN_X86_64_LCOMMON: | |
4955 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
4956 | if (lcomm == NULL) | |
4957 | { | |
4958 | lcomm = bfd_make_section_with_flags (abfd, | |
4959 | "LARGE_COMMON", | |
4960 | (SEC_ALLOC | |
4961 | | SEC_IS_COMMON | |
4962 | | SEC_LINKER_CREATED)); | |
4963 | if (lcomm == NULL) | |
4964 | return FALSE; | |
4965 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
4966 | } | |
4967 | *secp = lcomm; | |
4968 | *valp = sym->st_size; | |
c35bdf6e | 4969 | return TRUE; |
3b22753a | 4970 | } |
d8045f23 | 4971 | |
c16153ae | 4972 | if ((abfd->flags & DYNAMIC) == 0 |
f64b2e8d NC |
4973 | && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
4974 | || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)) | |
4975 | elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE; | |
d8045f23 | 4976 | |
3b22753a L |
4977 | return TRUE; |
4978 | } | |
4979 | ||
4980 | ||
4981 | /* Given a BFD section, try to locate the corresponding ELF section | |
4982 | index. */ | |
4983 | ||
4984 | static bfd_boolean | |
351f65ca L |
4985 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
4986 | asection *sec, int *index_return) | |
3b22753a L |
4987 | { |
4988 | if (sec == &_bfd_elf_large_com_section) | |
4989 | { | |
91d6fa6a | 4990 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
4991 | return TRUE; |
4992 | } | |
4993 | return FALSE; | |
4994 | } | |
4995 | ||
4996 | /* Process a symbol. */ | |
4997 | ||
4998 | static void | |
351f65ca L |
4999 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
5000 | asymbol *asym) | |
3b22753a L |
5001 | { |
5002 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
5003 | ||
5004 | switch (elfsym->internal_elf_sym.st_shndx) | |
5005 | { | |
5006 | case SHN_X86_64_LCOMMON: | |
5007 | asym->section = &_bfd_elf_large_com_section; | |
5008 | asym->value = elfsym->internal_elf_sym.st_size; | |
5009 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
5010 | asym->flags &= ~BSF_GLOBAL; | |
5011 | break; | |
5012 | } | |
5013 | } | |
5014 | ||
5015 | static bfd_boolean | |
351f65ca | 5016 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
5017 | { |
5018 | return (sym->st_shndx == SHN_COMMON | |
5019 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
5020 | } | |
5021 | ||
5022 | static unsigned int | |
351f65ca | 5023 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
5024 | { |
5025 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
5026 | return SHN_COMMON; | |
5027 | else | |
5028 | return SHN_X86_64_LCOMMON; | |
5029 | } | |
5030 | ||
5031 | static asection * | |
351f65ca | 5032 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
5033 | { |
5034 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
5035 | return bfd_com_section_ptr; | |
5036 | else | |
5037 | return &_bfd_elf_large_com_section; | |
5038 | } | |
5039 | ||
5040 | static bfd_boolean | |
5d13b3b3 AM |
5041 | elf_x86_64_merge_symbol (struct elf_link_hash_entry *h, |
5042 | const Elf_Internal_Sym *sym, | |
351f65ca | 5043 | asection **psec, |
5d13b3b3 AM |
5044 | bfd_boolean newdef, |
5045 | bfd_boolean olddef, | |
351f65ca | 5046 | bfd *oldbfd, |
5d13b3b3 | 5047 | const asection *oldsec) |
3b22753a L |
5048 | { |
5049 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
5050 | normal common symbol. We turn the large common symbol into a |
5051 | normal one. */ | |
5d13b3b3 | 5052 | if (!olddef |
3b22753a | 5053 | && h->root.type == bfd_link_hash_common |
5d13b3b3 AM |
5054 | && !newdef |
5055 | && bfd_is_com_section (*psec) | |
5056 | && oldsec != *psec) | |
3b22753a | 5057 | { |
00492999 | 5058 | if (sym->st_shndx == SHN_COMMON |
5d13b3b3 | 5059 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0) |
00492999 L |
5060 | { |
5061 | h->root.u.c.p->section | |
5062 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
5063 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
5064 | } | |
5065 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5d13b3b3 AM |
5066 | && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0) |
5067 | *psec = bfd_com_section_ptr; | |
3b22753a L |
5068 | } |
5069 | ||
5070 | return TRUE; | |
5071 | } | |
5072 | ||
5073 | static int | |
351f65ca L |
5074 | elf_x86_64_additional_program_headers (bfd *abfd, |
5075 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
5076 | { |
5077 | asection *s; | |
9a2e389a | 5078 | int count = 0; |
3b22753a L |
5079 | |
5080 | /* Check to see if we need a large readonly segment. */ | |
5081 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
5082 | if (s && (s->flags & SEC_LOAD)) | |
5083 | count++; | |
5084 | ||
5085 | /* Check to see if we need a large data segment. Since .lbss sections | |
5086 | is placed right after the .bss section, there should be no need for | |
5087 | a large data segment just because of .lbss. */ | |
5088 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
5089 | if (s && (s->flags & SEC_LOAD)) | |
5090 | count++; | |
5091 | ||
5092 | return count; | |
5093 | } | |
5094 | ||
fdc90cb4 JJ |
5095 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
5096 | ||
5097 | static bfd_boolean | |
351f65ca | 5098 | elf_x86_64_hash_symbol (struct elf_link_hash_entry *h) |
fdc90cb4 JJ |
5099 | { |
5100 | if (h->plt.offset != (bfd_vma) -1 | |
5101 | && !h->def_regular | |
5102 | && !h->pointer_equality_needed) | |
5103 | return FALSE; | |
5104 | ||
5105 | return _bfd_elf_hash_symbol (h); | |
5106 | } | |
5107 | ||
c543bf9a L |
5108 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
5109 | ||
5110 | static bfd_boolean | |
5111 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
5112 | const bfd_target *output) | |
5113 | { | |
5114 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
5115 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
5116 | && _bfd_elf_relocs_compatible (input, output)); | |
5117 | } | |
5118 | ||
9a2e389a | 5119 | static const struct bfd_elf_special_section |
351f65ca | 5120 | elf_x86_64_special_sections[]= |
3b22753a | 5121 | { |
0112cd26 NC |
5122 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
5123 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
5124 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
5125 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
5126 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
5127 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
5128 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
5129 | }; |
5130 | ||
70256ad8 AJ |
5131 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec |
5132 | #define TARGET_LITTLE_NAME "elf64-x86-64" | |
5133 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 5134 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 5135 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 5136 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 5137 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 5138 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
5139 | |
5140 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 5141 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
5142 | #define elf_backend_want_got_plt 1 |
5143 | #define elf_backend_plt_readonly 1 | |
5144 | #define elf_backend_want_plt_sym 0 | |
5145 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 5146 | #define elf_backend_rela_normal 1 |
e41b3a13 | 5147 | #define elf_backend_plt_alignment 4 |
70256ad8 | 5148 | |
351f65ca | 5149 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 5150 | |
70256ad8 | 5151 | #define bfd_elf64_bfd_link_hash_table_create \ |
351f65ca | 5152 | elf_x86_64_link_hash_table_create |
c25bc9fc | 5153 | #define bfd_elf64_bfd_link_hash_table_free \ |
351f65ca L |
5154 | elf_x86_64_link_hash_table_free |
5155 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup | |
157090f7 | 5156 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 5157 | elf_x86_64_reloc_name_lookup |
70256ad8 | 5158 | |
351f65ca | 5159 | #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol |
c543bf9a | 5160 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca L |
5161 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
5162 | #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol | |
5163 | #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections | |
5164 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections | |
5165 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
5166 | #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook | |
5167 | #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook | |
5168 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus | |
5169 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
5170 | #ifdef CORE_HEADER |
5171 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
5172 | #endif | |
351f65ca L |
5173 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
5174 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
5175 | #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections | |
5176 | #define elf_backend_always_size_sections elf_x86_64_always_size_sections | |
74541ad4 | 5177 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
351f65ca | 5178 | #define elf_backend_plt_sym_val elf_x86_64_plt_sym_val |
407443a3 | 5179 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
351f65ca | 5180 | #define bfd_elf64_mkobject elf_x86_64_mkobject |
8d88c4ca | 5181 | |
d2b2c203 | 5182 | #define elf_backend_section_from_shdr \ |
351f65ca | 5183 | elf_x86_64_section_from_shdr |
d2b2c203 | 5184 | |
3b22753a | 5185 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 5186 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 5187 | #define elf_backend_add_symbol_hook \ |
351f65ca | 5188 | elf_x86_64_add_symbol_hook |
3b22753a | 5189 | #define elf_backend_symbol_processing \ |
351f65ca | 5190 | elf_x86_64_symbol_processing |
3b22753a | 5191 | #define elf_backend_common_section_index \ |
351f65ca | 5192 | elf_x86_64_common_section_index |
3b22753a | 5193 | #define elf_backend_common_section \ |
351f65ca | 5194 | elf_x86_64_common_section |
3b22753a | 5195 | #define elf_backend_common_definition \ |
351f65ca | 5196 | elf_x86_64_common_definition |
3b22753a | 5197 | #define elf_backend_merge_symbol \ |
351f65ca | 5198 | elf_x86_64_merge_symbol |
3b22753a | 5199 | #define elf_backend_special_sections \ |
351f65ca | 5200 | elf_x86_64_special_sections |
3b22753a | 5201 | #define elf_backend_additional_program_headers \ |
351f65ca | 5202 | elf_x86_64_additional_program_headers |
fdc90cb4 | 5203 | #define elf_backend_hash_symbol \ |
351f65ca | 5204 | elf_x86_64_hash_symbol |
3b22753a | 5205 | |
d8045f23 NC |
5206 | #define elf_backend_post_process_headers _bfd_elf_set_osabi |
5207 | ||
8d88c4ca | 5208 | #include "elf64-target.h" |
9d7cbccd NC |
5209 | |
5210 | /* FreeBSD support. */ | |
5211 | ||
5212 | #undef TARGET_LITTLE_SYM | |
5213 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec | |
5214 | #undef TARGET_LITTLE_NAME | |
5215 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
5216 | ||
d1036acb L |
5217 | #undef ELF_OSABI |
5218 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 5219 | |
9d7cbccd NC |
5220 | #undef elf64_bed |
5221 | #define elf64_bed elf64_x86_64_fbsd_bed | |
5222 | ||
5223 | #include "elf64-target.h" | |
8a9036a4 | 5224 | |
a6cc6b3b RO |
5225 | /* Solaris 2 support. */ |
5226 | ||
5227 | #undef TARGET_LITTLE_SYM | |
5228 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec | |
5229 | #undef TARGET_LITTLE_NAME | |
5230 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
5231 | ||
5232 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
5233 | objects won't be recognized. */ | |
5234 | #undef ELF_OSABI | |
5235 | ||
5236 | #undef elf64_bed | |
5237 | #define elf64_bed elf64_x86_64_sol2_bed | |
5238 | ||
7dc98aea RO |
5239 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
5240 | boundary. */ | |
5241 | #undef elf_backend_static_tls_alignment | |
5242 | #define elf_backend_static_tls_alignment 16 | |
5243 | ||
a6cc6b3b RO |
5244 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
5245 | ||
5246 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
5247 | File, p.63. */ | |
5248 | #undef elf_backend_want_plt_sym | |
5249 | #define elf_backend_want_plt_sym 1 | |
5250 | ||
5251 | #include "elf64-target.h" | |
5252 | ||
8059fb19 RM |
5253 | /* Native Client support. */ |
5254 | ||
5255 | #undef TARGET_LITTLE_SYM | |
5256 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_nacl_vec | |
5257 | #undef TARGET_LITTLE_NAME | |
5258 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
5259 | #undef elf64_bed | |
5260 | #define elf64_bed elf64_x86_64_nacl_bed | |
5261 | ||
5262 | #undef ELF_MAXPAGESIZE | |
5263 | #undef ELF_MINPAGESIZE | |
5264 | #undef ELF_COMMONPAGESIZE | |
5265 | #define ELF_MAXPAGESIZE 0x10000 | |
5266 | #define ELF_MINPAGESIZE 0x10000 | |
5267 | #define ELF_COMMONPAGESIZE 0x10000 | |
5268 | ||
5269 | /* Restore defaults. */ | |
5270 | #undef ELF_OSABI | |
5271 | #undef elf_backend_static_tls_alignment | |
5272 | #undef elf_backend_want_plt_sym | |
5273 | #define elf_backend_want_plt_sym 0 | |
5274 | ||
5275 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
5276 | ||
5277 | #undef elf_backend_plt_alignment | |
5278 | #define elf_backend_plt_alignment 5 | |
5279 | #define NACL_PLT_ENTRY_SIZE 64 | |
5280 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
5281 | ||
5282 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
5283 | { | |
5284 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
5285 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ | |
5286 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
5287 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5288 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
5289 | ||
ea2d813e RM |
5290 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
5291 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopl %cs:0x0(%rax,%rax,1) */ | |
5292 | ||
5293 | /* 32 bytes of nop to pad out to the standard size. */ | |
8059fb19 RM |
5294 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ |
5295 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
5296 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
5297 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
ea2d813e RM |
5298 | 0x66, /* excess data32 prefix */ |
5299 | 0x90 /* nop */ | |
8059fb19 RM |
5300 | }; |
5301 | ||
5302 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
5303 | { | |
5304 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
5305 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
5306 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5307 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
5308 | ||
5309 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
5310 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
5311 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
5312 | ||
5313 | /* Lazy GOT entries point here (32-byte aligned). */ | |
5314 | 0x68, /* pushq immediate */ | |
5315 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
5316 | 0xe9, /* jmp relative */ | |
5317 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
5318 | ||
5319 | /* 22 bytes of nop to pad out to the standard size. */ | |
5320 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
5321 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
5322 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ | |
5323 | }; | |
5324 | ||
5325 | /* .eh_frame covering the .plt section. */ | |
5326 | ||
5327 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
5328 | { | |
5329 | #if (PLT_CIE_LENGTH != 20 \ | |
5330 | || PLT_FDE_LENGTH != 36 \ | |
5331 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
5332 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
5333 | # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!" | |
5334 | #endif | |
5335 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
5336 | 0, 0, 0, 0, /* CIE ID */ | |
5337 | 1, /* CIE version */ | |
5338 | 'z', 'R', 0, /* Augmentation string */ | |
5339 | 1, /* Code alignment factor */ | |
5340 | 0x78, /* Data alignment factor */ | |
5341 | 16, /* Return address column */ | |
5342 | 1, /* Augmentation size */ | |
5343 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
5344 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
5345 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
5346 | DW_CFA_nop, DW_CFA_nop, | |
5347 | ||
5348 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
5349 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
5350 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
5351 | 0, 0, 0, 0, /* .plt size goes here */ | |
5352 | 0, /* Augmentation size */ | |
5353 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
5354 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
5355 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
5356 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
5357 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
5358 | 13, /* Block length */ | |
5359 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
5360 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
5361 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
5362 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
5363 | DW_CFA_nop, DW_CFA_nop | |
5364 | }; | |
5365 | ||
5366 | static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed = | |
5367 | { | |
5368 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ | |
5369 | elf_x86_64_nacl_plt_entry, /* plt_entry */ | |
5370 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
5371 | 2, /* plt0_got1_offset */ | |
5372 | 9, /* plt0_got2_offset */ | |
5373 | 13, /* plt0_got2_insn_end */ | |
5374 | 3, /* plt_got_offset */ | |
5375 | 33, /* plt_reloc_offset */ | |
5376 | 38, /* plt_plt_offset */ | |
5377 | 7, /* plt_got_insn_size */ | |
5378 | 42, /* plt_plt_insn_end */ | |
5379 | 32, /* plt_lazy_offset */ | |
5380 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ | |
5381 | sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */ | |
5382 | }; | |
5383 | ||
5384 | #undef elf_backend_arch_data | |
5385 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
5386 | ||
5a68afcf RM |
5387 | #undef elf_backend_modify_segment_map |
5388 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
5389 | #undef elf_backend_modify_program_headers | |
5390 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
5391 | ||
8059fb19 RM |
5392 | #include "elf64-target.h" |
5393 | ||
5394 | /* Native Client x32 support. */ | |
5395 | ||
5396 | #undef TARGET_LITTLE_SYM | |
5397 | #define TARGET_LITTLE_SYM bfd_elf32_x86_64_nacl_vec | |
5398 | #undef TARGET_LITTLE_NAME | |
5399 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" | |
5400 | #undef elf32_bed | |
5401 | #define elf32_bed elf32_x86_64_nacl_bed | |
5402 | ||
5403 | #define bfd_elf32_bfd_link_hash_table_create \ | |
5404 | elf_x86_64_link_hash_table_create | |
5405 | #define bfd_elf32_bfd_link_hash_table_free \ | |
5406 | elf_x86_64_link_hash_table_free | |
5407 | #define bfd_elf32_bfd_reloc_type_lookup \ | |
5408 | elf_x86_64_reloc_type_lookup | |
5409 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
5410 | elf_x86_64_reloc_name_lookup | |
5411 | #define bfd_elf32_mkobject \ | |
5412 | elf_x86_64_mkobject | |
5413 | ||
5414 | #undef elf_backend_object_p | |
5415 | #define elf_backend_object_p \ | |
5416 | elf32_x86_64_elf_object_p | |
5417 | ||
5418 | #undef elf_backend_bfd_from_remote_memory | |
5419 | #define elf_backend_bfd_from_remote_memory \ | |
5420 | _bfd_elf32_bfd_from_remote_memory | |
5421 | ||
5422 | #undef elf_backend_size_info | |
5423 | #define elf_backend_size_info \ | |
5424 | _bfd_elf32_size_info | |
5425 | ||
5426 | #include "elf32-target.h" | |
5427 | ||
5428 | /* Restore defaults. */ | |
5a68afcf | 5429 | #undef elf_backend_object_p |
8059fb19 | 5430 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
5431 | #undef elf_backend_bfd_from_remote_memory |
5432 | #undef elf_backend_size_info | |
5433 | #undef elf_backend_modify_segment_map | |
5434 | #undef elf_backend_modify_program_headers | |
8059fb19 | 5435 | |
8a9036a4 L |
5436 | /* Intel L1OM support. */ |
5437 | ||
5438 | static bfd_boolean | |
5439 | elf64_l1om_elf_object_p (bfd *abfd) | |
5440 | { | |
5441 | /* Set the right machine number for an L1OM elf64 file. */ | |
5442 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
5443 | return TRUE; | |
5444 | } | |
5445 | ||
5446 | #undef TARGET_LITTLE_SYM | |
5447 | #define TARGET_LITTLE_SYM bfd_elf64_l1om_vec | |
5448 | #undef TARGET_LITTLE_NAME | |
5449 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
5450 | #undef ELF_ARCH | |
5451 | #define ELF_ARCH bfd_arch_l1om | |
5452 | ||
5453 | #undef ELF_MACHINE_CODE | |
5454 | #define ELF_MACHINE_CODE EM_L1OM | |
5455 | ||
5456 | #undef ELF_OSABI | |
5457 | ||
5458 | #undef elf64_bed | |
5459 | #define elf64_bed elf64_l1om_bed | |
5460 | ||
5461 | #undef elf_backend_object_p | |
5462 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
5463 | ||
8059fb19 RM |
5464 | /* Restore defaults. */ |
5465 | #undef ELF_MAXPAGESIZE | |
5466 | #undef ELF_MINPAGESIZE | |
5467 | #undef ELF_COMMONPAGESIZE | |
5468 | #define ELF_MAXPAGESIZE 0x200000 | |
5469 | #define ELF_MINPAGESIZE 0x1000 | |
5470 | #define ELF_COMMONPAGESIZE 0x1000 | |
5471 | #undef elf_backend_plt_alignment | |
5472 | #define elf_backend_plt_alignment 4 | |
5473 | #undef elf_backend_arch_data | |
5474 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 5475 | |
8a9036a4 L |
5476 | #include "elf64-target.h" |
5477 | ||
5478 | /* FreeBSD L1OM support. */ | |
5479 | ||
5480 | #undef TARGET_LITTLE_SYM | |
5481 | #define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec | |
5482 | #undef TARGET_LITTLE_NAME | |
5483 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
5484 | ||
5485 | #undef ELF_OSABI | |
5486 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5487 | ||
5488 | #undef elf64_bed | |
5489 | #define elf64_bed elf64_l1om_fbsd_bed | |
5490 | ||
8a9036a4 | 5491 | #include "elf64-target.h" |
351f65ca | 5492 | |
7a9068fe L |
5493 | /* Intel K1OM support. */ |
5494 | ||
5495 | static bfd_boolean | |
5496 | elf64_k1om_elf_object_p (bfd *abfd) | |
5497 | { | |
5498 | /* Set the right machine number for an K1OM elf64 file. */ | |
5499 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
5500 | return TRUE; | |
5501 | } | |
5502 | ||
5503 | #undef TARGET_LITTLE_SYM | |
5504 | #define TARGET_LITTLE_SYM bfd_elf64_k1om_vec | |
5505 | #undef TARGET_LITTLE_NAME | |
5506 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
5507 | #undef ELF_ARCH | |
5508 | #define ELF_ARCH bfd_arch_k1om | |
5509 | ||
5510 | #undef ELF_MACHINE_CODE | |
5511 | #define ELF_MACHINE_CODE EM_K1OM | |
5512 | ||
5513 | #undef ELF_OSABI | |
5514 | ||
5515 | #undef elf64_bed | |
5516 | #define elf64_bed elf64_k1om_bed | |
5517 | ||
5518 | #undef elf_backend_object_p | |
5519 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
5520 | ||
5521 | #undef elf_backend_static_tls_alignment | |
5522 | ||
5523 | #undef elf_backend_want_plt_sym | |
5524 | #define elf_backend_want_plt_sym 0 | |
5525 | ||
5526 | #include "elf64-target.h" | |
5527 | ||
5528 | /* FreeBSD K1OM support. */ | |
5529 | ||
5530 | #undef TARGET_LITTLE_SYM | |
5531 | #define TARGET_LITTLE_SYM bfd_elf64_k1om_freebsd_vec | |
5532 | #undef TARGET_LITTLE_NAME | |
5533 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
5534 | ||
5535 | #undef ELF_OSABI | |
5536 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5537 | ||
5538 | #undef elf64_bed | |
5539 | #define elf64_bed elf64_k1om_fbsd_bed | |
5540 | ||
5541 | #include "elf64-target.h" | |
5542 | ||
351f65ca L |
5543 | /* 32bit x86-64 support. */ |
5544 | ||
351f65ca L |
5545 | #undef TARGET_LITTLE_SYM |
5546 | #define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec | |
5547 | #undef TARGET_LITTLE_NAME | |
5548 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 5549 | #undef elf32_bed |
351f65ca L |
5550 | |
5551 | #undef ELF_ARCH | |
5552 | #define ELF_ARCH bfd_arch_i386 | |
5553 | ||
5554 | #undef ELF_MACHINE_CODE | |
5555 | #define ELF_MACHINE_CODE EM_X86_64 | |
5556 | ||
351f65ca L |
5557 | #undef ELF_OSABI |
5558 | ||
351f65ca L |
5559 | #undef elf_backend_object_p |
5560 | #define elf_backend_object_p \ | |
5561 | elf32_x86_64_elf_object_p | |
5562 | ||
5563 | #undef elf_backend_bfd_from_remote_memory | |
5564 | #define elf_backend_bfd_from_remote_memory \ | |
5565 | _bfd_elf32_bfd_from_remote_memory | |
5566 | ||
5567 | #undef elf_backend_size_info | |
5568 | #define elf_backend_size_info \ | |
5569 | _bfd_elf32_size_info | |
5570 | ||
5571 | #include "elf32-target.h" |