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), | |
67a4f2b7 AO |
151 | EMPTY_HOWTO (32), |
152 | EMPTY_HOWTO (33), | |
153 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0, | |
154 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
155 | "R_X86_64_GOTPC32_TLSDESC", | |
156 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
157 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0, | |
158 | complain_overflow_dont, bfd_elf_generic_reloc, | |
159 | "R_X86_64_TLSDESC_CALL", | |
160 | FALSE, 0, 0, FALSE), | |
161 | HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0, | |
162 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
163 | "R_X86_64_TLSDESC", | |
164 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
cbe950e9 L |
165 | HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
166 | bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE, | |
167 | MINUS_ONE, FALSE), | |
64d25c44 L |
168 | HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
169 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE, | |
170 | MINUS_ONE, FALSE), | |
fe4770f4 | 171 | |
a33d77bc JB |
172 | /* We have a gap in the reloc numbers here. |
173 | R_X86_64_standard counts the number up to this point, and | |
174 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
175 | R_X86_64_GNU_VT* to form an index into this table. */ | |
cbe950e9 | 176 | #define R_X86_64_standard (R_X86_64_IRELATIVE + 1) |
a33d77bc JB |
177 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
178 | ||
fe4770f4 | 179 | /* GNU extension to record C++ vtable hierarchy. */ |
b34976b6 AM |
180 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
181 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
182 | |
183 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
184 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
185 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
d7921315 L |
186 | FALSE), |
187 | ||
188 | /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */ | |
189 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
190 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
191 | FALSE) | |
8d88c4ca NC |
192 | }; |
193 | ||
d8045f23 NC |
194 | #define IS_X86_64_PCREL_TYPE(TYPE) \ |
195 | ( ((TYPE) == R_X86_64_PC8) \ | |
196 | || ((TYPE) == R_X86_64_PC16) \ | |
197 | || ((TYPE) == R_X86_64_PC32) \ | |
198 | || ((TYPE) == R_X86_64_PC64)) | |
199 | ||
8d88c4ca | 200 | /* Map BFD relocs to the x86_64 elf relocs. */ |
70256ad8 AJ |
201 | struct elf_reloc_map |
202 | { | |
8d88c4ca NC |
203 | bfd_reloc_code_real_type bfd_reloc_val; |
204 | unsigned char elf_reloc_val; | |
205 | }; | |
206 | ||
dc810e39 | 207 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 208 | { |
70256ad8 AJ |
209 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
210 | { BFD_RELOC_64, R_X86_64_64, }, | |
211 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
212 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
213 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
214 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
215 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
216 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
217 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
218 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
219 | { BFD_RELOC_32, R_X86_64_32, }, | |
220 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
221 | { BFD_RELOC_16, R_X86_64_16, }, | |
222 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
223 | { BFD_RELOC_8, R_X86_64_8, }, | |
224 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
225 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
226 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
227 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
228 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
229 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
230 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
231 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
232 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
233 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
234 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
235 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
236 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
237 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
238 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
239 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
240 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
67a4f2b7 AO |
241 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
242 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
243 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
cbe950e9 | 244 | { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, }, |
fe4770f4 AJ |
245 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
246 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
247 | }; |
248 | ||
67a4f2b7 | 249 | static reloc_howto_type * |
351f65ca | 250 | elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) |
67a4f2b7 AO |
251 | { |
252 | unsigned i; | |
253 | ||
d7921315 L |
254 | if (r_type == (unsigned int) R_X86_64_32) |
255 | { | |
256 | if (ABI_64_P (abfd)) | |
257 | i = r_type; | |
258 | else | |
259 | i = ARRAY_SIZE (x86_64_elf_howto_table) - 1; | |
260 | } | |
261 | else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
262 | || r_type >= (unsigned int) R_X86_64_max) | |
67a4f2b7 AO |
263 | { |
264 | if (r_type >= (unsigned int) R_X86_64_standard) | |
265 | { | |
266 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), | |
267 | abfd, (int) r_type); | |
268 | r_type = R_X86_64_NONE; | |
269 | } | |
270 | i = r_type; | |
271 | } | |
272 | else | |
273 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
274 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
275 | return &x86_64_elf_howto_table[i]; | |
276 | } | |
8d88c4ca NC |
277 | |
278 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
279 | static reloc_howto_type * | |
351f65ca L |
280 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
281 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
282 | { |
283 | unsigned int i; | |
27482721 | 284 | |
8d88c4ca NC |
285 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
286 | i++) | |
287 | { | |
288 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
289 | return elf_x86_64_rtype_to_howto (abfd, |
290 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca NC |
291 | } |
292 | return 0; | |
293 | } | |
294 | ||
157090f7 | 295 | static reloc_howto_type * |
d7921315 | 296 | elf_x86_64_reloc_name_lookup (bfd *abfd, |
351f65ca | 297 | const char *r_name) |
157090f7 AM |
298 | { |
299 | unsigned int i; | |
300 | ||
d7921315 L |
301 | if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0) |
302 | { | |
303 | /* Get x32 R_X86_64_32. */ | |
304 | reloc_howto_type *reloc | |
305 | = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1]; | |
306 | BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32); | |
307 | return reloc; | |
308 | } | |
309 | ||
310 | for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++) | |
157090f7 AM |
311 | if (x86_64_elf_howto_table[i].name != NULL |
312 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
313 | return &x86_64_elf_howto_table[i]; | |
314 | ||
315 | return NULL; | |
316 | } | |
317 | ||
8d88c4ca | 318 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 319 | |
8d88c4ca | 320 | static void |
351f65ca L |
321 | elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
322 | Elf_Internal_Rela *dst) | |
8d88c4ca | 323 | { |
67a4f2b7 | 324 | unsigned r_type; |
8d88c4ca | 325 | |
351f65ca L |
326 | r_type = ELF32_R_TYPE (dst->r_info); |
327 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); | |
8d88c4ca NC |
328 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
329 | } | |
70256ad8 | 330 | \f |
3bab7989 | 331 | /* Support for core dump NOTE sections. */ |
b34976b6 | 332 | static bfd_boolean |
351f65ca | 333 | elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
334 | { |
335 | int offset; | |
eea6121a | 336 | size_t size; |
3bab7989 ML |
337 | |
338 | switch (note->descsz) | |
339 | { | |
340 | default: | |
b34976b6 | 341 | return FALSE; |
3bab7989 | 342 | |
bcd823f1 L |
343 | case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */ |
344 | /* pr_cursig */ | |
345 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); | |
346 | ||
347 | /* pr_pid */ | |
348 | elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24); | |
349 | ||
350 | /* pr_reg */ | |
351 | offset = 72; | |
352 | size = 216; | |
353 | ||
354 | break; | |
355 | ||
3bab7989 ML |
356 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ |
357 | /* pr_cursig */ | |
cedb70c5 | 358 | elf_tdata (abfd)->core_signal |
3bab7989 ML |
359 | = bfd_get_16 (abfd, note->descdata + 12); |
360 | ||
361 | /* pr_pid */ | |
261b8d08 | 362 | elf_tdata (abfd)->core_lwpid |
3bab7989 ML |
363 | = bfd_get_32 (abfd, note->descdata + 32); |
364 | ||
365 | /* pr_reg */ | |
366 | offset = 112; | |
eea6121a | 367 | size = 216; |
3bab7989 ML |
368 | |
369 | break; | |
370 | } | |
371 | ||
372 | /* Make a ".reg/999" section. */ | |
373 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 374 | size, note->descpos + offset); |
3bab7989 ML |
375 | } |
376 | ||
b34976b6 | 377 | static bfd_boolean |
351f65ca | 378 | elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
379 | { |
380 | switch (note->descsz) | |
381 | { | |
382 | default: | |
b34976b6 | 383 | return FALSE; |
3bab7989 | 384 | |
bcd823f1 L |
385 | case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */ |
386 | elf_tdata (abfd)->core_pid | |
387 | = bfd_get_32 (abfd, note->descdata + 12); | |
388 | elf_tdata (abfd)->core_program | |
389 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); | |
390 | elf_tdata (abfd)->core_command | |
391 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); | |
392 | break; | |
393 | ||
3bab7989 | 394 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ |
261b8d08 PA |
395 | elf_tdata (abfd)->core_pid |
396 | = bfd_get_32 (abfd, note->descdata + 24); | |
3bab7989 ML |
397 | elf_tdata (abfd)->core_program |
398 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); | |
399 | elf_tdata (abfd)->core_command | |
400 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); | |
401 | } | |
402 | ||
403 | /* Note that for some reason, a spurious space is tacked | |
404 | onto the end of the args in some (at least one anyway) | |
405 | implementations, so strip it off if it exists. */ | |
406 | ||
407 | { | |
408 | char *command = elf_tdata (abfd)->core_command; | |
409 | int n = strlen (command); | |
410 | ||
411 | if (0 < n && command[n - 1] == ' ') | |
412 | command[n - 1] = '\0'; | |
413 | } | |
414 | ||
b34976b6 | 415 | return TRUE; |
3bab7989 | 416 | } |
8fd79e71 L |
417 | |
418 | #ifdef CORE_HEADER | |
419 | static char * | |
420 | elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz, | |
421 | int note_type, ...) | |
422 | { | |
423 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8fd79e71 L |
424 | va_list ap; |
425 | const char *fname, *psargs; | |
426 | long pid; | |
427 | int cursig; | |
428 | const void *gregs; | |
429 | ||
430 | switch (note_type) | |
431 | { | |
432 | default: | |
433 | return NULL; | |
434 | ||
435 | case NT_PRPSINFO: | |
436 | va_start (ap, note_type); | |
437 | fname = va_arg (ap, const char *); | |
438 | psargs = va_arg (ap, const char *); | |
439 | va_end (ap); | |
440 | ||
441 | if (bed->s->elfclass == ELFCLASS32) | |
442 | { | |
443 | prpsinfo32_t data; | |
444 | memset (&data, 0, sizeof (data)); | |
445 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
446 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
447 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
448 | &data, sizeof (data)); | |
8fd79e71 L |
449 | } |
450 | else | |
451 | { | |
452 | prpsinfo_t data; | |
453 | memset (&data, 0, sizeof (data)); | |
454 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
455 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
e85c6a70 JK |
456 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
457 | &data, sizeof (data)); | |
8fd79e71 | 458 | } |
e85c6a70 | 459 | /* NOTREACHED */ |
8fd79e71 L |
460 | |
461 | case NT_PRSTATUS: | |
462 | va_start (ap, note_type); | |
463 | pid = va_arg (ap, long); | |
464 | cursig = va_arg (ap, int); | |
465 | gregs = va_arg (ap, const void *); | |
466 | va_end (ap); | |
467 | ||
468 | if (bed->s->elfclass == ELFCLASS32) | |
469 | { | |
470 | if (bed->elf_machine_code == EM_X86_64) | |
471 | { | |
472 | prstatusx32_t prstat; | |
473 | memset (&prstat, 0, sizeof (prstat)); | |
474 | prstat.pr_pid = pid; | |
475 | prstat.pr_cursig = cursig; | |
476 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
477 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
478 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
479 | } |
480 | else | |
481 | { | |
482 | prstatus32_t prstat; | |
483 | memset (&prstat, 0, sizeof (prstat)); | |
484 | prstat.pr_pid = pid; | |
485 | prstat.pr_cursig = cursig; | |
486 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
487 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
488 | &prstat, sizeof (prstat)); | |
8fd79e71 L |
489 | } |
490 | } | |
491 | else | |
492 | { | |
493 | prstatus_t prstat; | |
494 | memset (&prstat, 0, sizeof (prstat)); | |
495 | prstat.pr_pid = pid; | |
496 | prstat.pr_cursig = cursig; | |
497 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
e85c6a70 JK |
498 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
499 | &prstat, sizeof (prstat)); | |
8fd79e71 | 500 | } |
8fd79e71 | 501 | } |
e85c6a70 | 502 | /* NOTREACHED */ |
8fd79e71 L |
503 | } |
504 | #endif | |
3bab7989 | 505 | \f |
407443a3 | 506 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 507 | |
407443a3 | 508 | /* The name of the dynamic interpreter. This is put in the .interp |
70256ad8 AJ |
509 | section. */ |
510 | ||
351f65ca | 511 | #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
eec9dd95 | 512 | #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1" |
70256ad8 | 513 | |
d40d037c AJ |
514 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
515 | copying dynamic variables from a shared lib into an app's dynbss | |
516 | section, and instead use a dynamic relocation to point into the | |
517 | shared lib. */ | |
518 | #define ELIMINATE_COPY_RELOCS 1 | |
519 | ||
70256ad8 AJ |
520 | /* The size in bytes of an entry in the global offset table. */ |
521 | ||
522 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 523 | |
70256ad8 | 524 | /* The size in bytes of an entry in the procedure linkage table. */ |
8d88c4ca | 525 | |
70256ad8 AJ |
526 | #define PLT_ENTRY_SIZE 16 |
527 | ||
528 | /* The first entry in a procedure linkage table looks like this. See the | |
529 | SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */ | |
530 | ||
351f65ca | 531 | static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] = |
70256ad8 | 532 | { |
653165cc AJ |
533 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
534 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 535 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
536 | }; |
537 | ||
538 | /* Subsequent entries in a procedure linkage table look like this. */ | |
539 | ||
351f65ca | 540 | static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] = |
70256ad8 | 541 | { |
653165cc | 542 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 543 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 544 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
545 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
546 | 0xe9, /* jmp relative */ | |
547 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
548 | }; | |
549 | ||
e41b3a13 JJ |
550 | /* .eh_frame covering the .plt section. */ |
551 | ||
552 | static const bfd_byte elf_x86_64_eh_frame_plt[] = | |
553 | { | |
554 | #define PLT_CIE_LENGTH 20 | |
555 | #define PLT_FDE_LENGTH 36 | |
556 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
557 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
558 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
559 | 0, 0, 0, 0, /* CIE ID */ | |
560 | 1, /* CIE version */ | |
561 | 'z', 'R', 0, /* Augmentation string */ | |
562 | 1, /* Code alignment factor */ | |
563 | 0x78, /* Data alignment factor */ | |
564 | 16, /* Return address column */ | |
565 | 1, /* Augmentation size */ | |
566 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
567 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
568 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
569 | DW_CFA_nop, DW_CFA_nop, | |
570 | ||
571 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
572 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
573 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
574 | 0, 0, 0, 0, /* .plt size goes here */ | |
575 | 0, /* Augmentation size */ | |
576 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
577 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
578 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
579 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
580 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
581 | 11, /* Block length */ | |
582 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
583 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
584 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
585 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
586 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
587 | }; | |
588 | ||
eed180f8 RM |
589 | /* Architecture-specific backend data for x86-64. */ |
590 | ||
591 | struct elf_x86_64_backend_data | |
592 | { | |
593 | /* Templates for the initial PLT entry and for subsequent entries. */ | |
594 | const bfd_byte *plt0_entry; | |
595 | const bfd_byte *plt_entry; | |
596 | unsigned int plt_entry_size; /* Size of each PLT entry. */ | |
597 | ||
598 | /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */ | |
599 | unsigned int plt0_got1_offset; | |
600 | unsigned int plt0_got2_offset; | |
601 | ||
602 | /* Offset of the end of the PC-relative instruction containing | |
603 | plt0_got2_offset. */ | |
604 | unsigned int plt0_got2_insn_end; | |
605 | ||
606 | /* Offsets into plt_entry that are to be replaced with... */ | |
607 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
608 | unsigned int plt_reloc_offset; /* ... offset into relocation table. */ | |
609 | unsigned int plt_plt_offset; /* ... offset to start of .plt. */ | |
610 | ||
611 | /* Length of the PC-relative instruction containing plt_got_offset. */ | |
612 | unsigned int plt_got_insn_size; | |
613 | ||
614 | /* Offset of the end of the PC-relative jump to plt0_entry. */ | |
615 | unsigned int plt_plt_insn_end; | |
616 | ||
617 | /* Offset into plt_entry where the initial value of the GOT entry points. */ | |
618 | unsigned int plt_lazy_offset; | |
619 | ||
620 | /* .eh_frame covering the .plt section. */ | |
621 | const bfd_byte *eh_frame_plt; | |
622 | unsigned int eh_frame_plt_size; | |
623 | }; | |
624 | ||
625 | #define get_elf_x86_64_backend_data(abfd) \ | |
626 | ((const struct elf_x86_64_backend_data *) \ | |
627 | get_elf_backend_data (abfd)->arch_data) | |
628 | ||
629 | #define GET_PLT_ENTRY_SIZE(abfd) \ | |
630 | get_elf_x86_64_backend_data (abfd)->plt_entry_size | |
631 | ||
632 | /* These are the standard parameters. */ | |
633 | static const struct elf_x86_64_backend_data elf_x86_64_arch_bed = | |
634 | { | |
635 | elf_x86_64_plt0_entry, /* plt0_entry */ | |
636 | elf_x86_64_plt_entry, /* plt_entry */ | |
637 | sizeof (elf_x86_64_plt_entry), /* plt_entry_size */ | |
638 | 2, /* plt0_got1_offset */ | |
639 | 8, /* plt0_got2_offset */ | |
640 | 12, /* plt0_got2_insn_end */ | |
641 | 2, /* plt_got_offset */ | |
642 | 7, /* plt_reloc_offset */ | |
643 | 12, /* plt_plt_offset */ | |
644 | 6, /* plt_got_insn_size */ | |
645 | PLT_ENTRY_SIZE, /* plt_plt_insn_end */ | |
646 | 6, /* plt_lazy_offset */ | |
647 | elf_x86_64_eh_frame_plt, /* eh_frame_plt */ | |
648 | sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */ | |
649 | }; | |
650 | ||
651 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
652 | ||
70256ad8 AJ |
653 | /* x86-64 ELF linker hash entry. */ |
654 | ||
351f65ca | 655 | struct elf_x86_64_link_hash_entry |
70256ad8 | 656 | { |
c434dee6 | 657 | struct elf_link_hash_entry elf; |
70256ad8 | 658 | |
c434dee6 | 659 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 660 | struct elf_dyn_relocs *dyn_relocs; |
bffbf940 JJ |
661 | |
662 | #define GOT_UNKNOWN 0 | |
663 | #define GOT_NORMAL 1 | |
664 | #define GOT_TLS_GD 2 | |
665 | #define GOT_TLS_IE 3 | |
67a4f2b7 AO |
666 | #define GOT_TLS_GDESC 4 |
667 | #define GOT_TLS_GD_BOTH_P(type) \ | |
668 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
669 | #define GOT_TLS_GD_P(type) \ | |
670 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
671 | #define GOT_TLS_GDESC_P(type) \ | |
672 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
673 | #define GOT_TLS_GD_ANY_P(type) \ | |
674 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
bffbf940 | 675 | unsigned char tls_type; |
67a4f2b7 AO |
676 | |
677 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, | |
678 | starting at the end of the jump table. */ | |
679 | bfd_vma tlsdesc_got; | |
bffbf940 JJ |
680 | }; |
681 | ||
351f65ca L |
682 | #define elf_x86_64_hash_entry(ent) \ |
683 | ((struct elf_x86_64_link_hash_entry *)(ent)) | |
bffbf940 | 684 | |
351f65ca | 685 | struct elf_x86_64_obj_tdata |
bffbf940 JJ |
686 | { |
687 | struct elf_obj_tdata root; | |
688 | ||
689 | /* tls_type for each local got entry. */ | |
690 | char *local_got_tls_type; | |
67a4f2b7 AO |
691 | |
692 | /* GOTPLT entries for TLS descriptors. */ | |
693 | bfd_vma *local_tlsdesc_gotent; | |
70256ad8 AJ |
694 | }; |
695 | ||
351f65ca L |
696 | #define elf_x86_64_tdata(abfd) \ |
697 | ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any) | |
bffbf940 | 698 | |
351f65ca L |
699 | #define elf_x86_64_local_got_tls_type(abfd) \ |
700 | (elf_x86_64_tdata (abfd)->local_got_tls_type) | |
bffbf940 | 701 | |
351f65ca L |
702 | #define elf_x86_64_local_tlsdesc_gotent(abfd) \ |
703 | (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent) | |
bffbf940 | 704 | |
0ffa91dd NC |
705 | #define is_x86_64_elf(bfd) \ |
706 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
707 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 708 | && elf_object_id (bfd) == X86_64_ELF_DATA) |
0ffa91dd NC |
709 | |
710 | static bfd_boolean | |
351f65ca | 711 | elf_x86_64_mkobject (bfd *abfd) |
0ffa91dd | 712 | { |
351f65ca | 713 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata), |
4dfe6ac6 | 714 | X86_64_ELF_DATA); |
0ffa91dd NC |
715 | } |
716 | ||
c434dee6 | 717 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 718 | |
351f65ca | 719 | struct elf_x86_64_link_hash_table |
407443a3 | 720 | { |
c434dee6 | 721 | struct elf_link_hash_table elf; |
70256ad8 | 722 | |
c434dee6 | 723 | /* Short-cuts to get to dynamic linker sections. */ |
c434dee6 AJ |
724 | asection *sdynbss; |
725 | asection *srelbss; | |
e41b3a13 | 726 | asection *plt_eh_frame; |
70256ad8 | 727 | |
4dfe6ac6 NC |
728 | union |
729 | { | |
bffbf940 JJ |
730 | bfd_signed_vma refcount; |
731 | bfd_vma offset; | |
732 | } tls_ld_got; | |
733 | ||
67a4f2b7 AO |
734 | /* The amount of space used by the jump slots in the GOT. */ |
735 | bfd_vma sgotplt_jump_table_size; | |
736 | ||
87d72d41 AM |
737 | /* Small local sym cache. */ |
738 | struct sym_cache sym_cache; | |
9f03412a | 739 | |
351f65ca L |
740 | bfd_vma (*r_info) (bfd_vma, bfd_vma); |
741 | bfd_vma (*r_sym) (bfd_vma); | |
248775ba | 742 | unsigned int pointer_r_type; |
351f65ca L |
743 | const char *dynamic_interpreter; |
744 | int dynamic_interpreter_size; | |
745 | ||
9f03412a AO |
746 | /* _TLS_MODULE_BASE_ symbol. */ |
747 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
748 | |
749 | /* Used by local STT_GNU_IFUNC symbols. */ | |
750 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
751 | void * loc_hash_memory; |
752 | ||
753 | /* The offset into splt of the PLT entry for the TLS descriptor | |
754 | resolver. Special values are 0, if not necessary (or not found | |
755 | to be necessary yet), and -1 if needed but not determined | |
756 | yet. */ | |
757 | bfd_vma tlsdesc_plt; | |
758 | /* The offset into sgot of the GOT entry used by the PLT entry | |
759 | above. */ | |
760 | bfd_vma tlsdesc_got; | |
e1f98742 L |
761 | |
762 | /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */ | |
763 | bfd_vma next_jump_slot_index; | |
764 | /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */ | |
765 | bfd_vma next_irelative_index; | |
c434dee6 | 766 | }; |
70256ad8 AJ |
767 | |
768 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca | 769 | |
351f65ca | 770 | #define elf_x86_64_hash_table(p) \ |
4dfe6ac6 | 771 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
351f65ca | 772 | == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL) |
8d88c4ca | 773 | |
351f65ca | 774 | #define elf_x86_64_compute_jump_table_size(htab) \ |
6de2ae4a | 775 | ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE) |
67a4f2b7 | 776 | |
407443a3 | 777 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
778 | |
779 | static struct bfd_hash_entry * | |
351f65ca L |
780 | elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry, |
781 | struct bfd_hash_table *table, | |
782 | const char *string) | |
70256ad8 | 783 | { |
70256ad8 | 784 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
785 | subclass. */ |
786 | if (entry == NULL) | |
787 | { | |
a50b1753 | 788 | entry = (struct bfd_hash_entry *) |
eed180f8 RM |
789 | bfd_hash_allocate (table, |
790 | sizeof (struct elf_x86_64_link_hash_entry)); | |
c434dee6 AJ |
791 | if (entry == NULL) |
792 | return entry; | |
793 | } | |
70256ad8 AJ |
794 | |
795 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
796 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
797 | if (entry != NULL) | |
70256ad8 | 798 | { |
351f65ca | 799 | struct elf_x86_64_link_hash_entry *eh; |
c434dee6 | 800 | |
351f65ca | 801 | eh = (struct elf_x86_64_link_hash_entry *) entry; |
c434dee6 | 802 | eh->dyn_relocs = NULL; |
bffbf940 | 803 | eh->tls_type = GOT_UNKNOWN; |
67a4f2b7 | 804 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
805 | } |
806 | ||
c434dee6 | 807 | return entry; |
70256ad8 AJ |
808 | } |
809 | ||
c25bc9fc L |
810 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
811 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
812 | as global symbol. We reuse indx and dynstr_index for local symbol | |
813 | hash since they aren't used by global symbols in this backend. */ | |
814 | ||
815 | static hashval_t | |
351f65ca | 816 | elf_x86_64_local_htab_hash (const void *ptr) |
c25bc9fc L |
817 | { |
818 | struct elf_link_hash_entry *h | |
819 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 820 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
821 | } |
822 | ||
823 | /* Compare local hash entries. */ | |
824 | ||
825 | static int | |
351f65ca | 826 | elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2) |
c25bc9fc L |
827 | { |
828 | struct elf_link_hash_entry *h1 | |
829 | = (struct elf_link_hash_entry *) ptr1; | |
830 | struct elf_link_hash_entry *h2 | |
831 | = (struct elf_link_hash_entry *) ptr2; | |
832 | ||
833 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
834 | } | |
835 | ||
836 | /* Find and/or create a hash entry for local symbol. */ | |
837 | ||
838 | static struct elf_link_hash_entry * | |
351f65ca L |
839 | elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab, |
840 | bfd *abfd, const Elf_Internal_Rela *rel, | |
841 | bfd_boolean create) | |
c25bc9fc | 842 | { |
351f65ca | 843 | struct elf_x86_64_link_hash_entry e, *ret; |
c25bc9fc | 844 | asection *sec = abfd->sections; |
d2149d72 | 845 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
351f65ca | 846 | htab->r_sym (rel->r_info)); |
c25bc9fc L |
847 | void **slot; |
848 | ||
849 | e.elf.indx = sec->id; | |
351f65ca | 850 | e.elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc L |
851 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, |
852 | create ? INSERT : NO_INSERT); | |
853 | ||
854 | if (!slot) | |
855 | return NULL; | |
856 | ||
857 | if (*slot) | |
858 | { | |
351f65ca | 859 | ret = (struct elf_x86_64_link_hash_entry *) *slot; |
c25bc9fc L |
860 | return &ret->elf; |
861 | } | |
862 | ||
351f65ca | 863 | ret = (struct elf_x86_64_link_hash_entry *) |
c25bc9fc | 864 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, |
351f65ca | 865 | sizeof (struct elf_x86_64_link_hash_entry)); |
c25bc9fc L |
866 | if (ret) |
867 | { | |
868 | memset (ret, 0, sizeof (*ret)); | |
869 | ret->elf.indx = sec->id; | |
351f65ca | 870 | ret->elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc | 871 | ret->elf.dynindx = -1; |
c25bc9fc L |
872 | *slot = ret; |
873 | } | |
874 | return &ret->elf; | |
875 | } | |
876 | ||
8d88c4ca NC |
877 | /* Create an X86-64 ELF linker hash table. */ |
878 | ||
879 | static struct bfd_link_hash_table * | |
351f65ca | 880 | elf_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca | 881 | { |
351f65ca L |
882 | struct elf_x86_64_link_hash_table *ret; |
883 | bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table); | |
8d88c4ca | 884 | |
351f65ca | 885 | ret = (struct elf_x86_64_link_hash_table *) bfd_malloc (amt); |
c434dee6 | 886 | if (ret == NULL) |
8d88c4ca NC |
887 | return NULL; |
888 | ||
eb4ff4d6 | 889 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
351f65ca L |
890 | elf_x86_64_link_hash_newfunc, |
891 | sizeof (struct elf_x86_64_link_hash_entry), | |
4dfe6ac6 | 892 | X86_64_ELF_DATA)) |
8d88c4ca | 893 | { |
e2d34d7d | 894 | free (ret); |
8d88c4ca NC |
895 | return NULL; |
896 | } | |
897 | ||
c434dee6 AJ |
898 | ret->sdynbss = NULL; |
899 | ret->srelbss = NULL; | |
332ce62b | 900 | ret->plt_eh_frame = NULL; |
87d72d41 | 901 | ret->sym_cache.abfd = NULL; |
67a4f2b7 AO |
902 | ret->tlsdesc_plt = 0; |
903 | ret->tlsdesc_got = 0; | |
bffbf940 | 904 | ret->tls_ld_got.refcount = 0; |
67a4f2b7 | 905 | ret->sgotplt_jump_table_size = 0; |
9f03412a | 906 | ret->tls_module_base = NULL; |
eed180f8 | 907 | ret->next_jump_slot_index = 0; |
e1f98742 | 908 | ret->next_irelative_index = 0; |
6bbec505 | 909 | |
351f65ca L |
910 | if (ABI_64_P (abfd)) |
911 | { | |
912 | ret->r_info = elf64_r_info; | |
913 | ret->r_sym = elf64_r_sym; | |
248775ba | 914 | ret->pointer_r_type = R_X86_64_64; |
351f65ca L |
915 | ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; |
916 | ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; | |
917 | } | |
918 | else | |
919 | { | |
920 | ret->r_info = elf32_r_info; | |
921 | ret->r_sym = elf32_r_sym; | |
248775ba | 922 | ret->pointer_r_type = R_X86_64_32; |
351f65ca L |
923 | ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; |
924 | ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER; | |
925 | } | |
926 | ||
c25bc9fc | 927 | ret->loc_hash_table = htab_try_create (1024, |
351f65ca L |
928 | elf_x86_64_local_htab_hash, |
929 | elf_x86_64_local_htab_eq, | |
c25bc9fc L |
930 | NULL); |
931 | ret->loc_hash_memory = objalloc_create (); | |
932 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
933 | { | |
934 | free (ret); | |
935 | return NULL; | |
936 | } | |
937 | ||
c434dee6 AJ |
938 | return &ret->elf.root; |
939 | } | |
940 | ||
c25bc9fc L |
941 | /* Destroy an X86-64 ELF linker hash table. */ |
942 | ||
943 | static void | |
351f65ca | 944 | elf_x86_64_link_hash_table_free (struct bfd_link_hash_table *hash) |
c25bc9fc | 945 | { |
351f65ca L |
946 | struct elf_x86_64_link_hash_table *htab |
947 | = (struct elf_x86_64_link_hash_table *) hash; | |
c25bc9fc L |
948 | |
949 | if (htab->loc_hash_table) | |
950 | htab_delete (htab->loc_hash_table); | |
951 | if (htab->loc_hash_memory) | |
952 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
953 | _bfd_generic_link_hash_table_free (hash); | |
954 | } | |
955 | ||
c434dee6 AJ |
956 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
957 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
958 | hash table. */ | |
959 | ||
b34976b6 | 960 | static bfd_boolean |
351f65ca L |
961 | elf_x86_64_create_dynamic_sections (bfd *dynobj, |
962 | struct bfd_link_info *info) | |
c434dee6 | 963 | { |
351f65ca | 964 | struct elf_x86_64_link_hash_table *htab; |
c434dee6 | 965 | |
c434dee6 | 966 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 967 | return FALSE; |
c434dee6 | 968 | |
351f65ca | 969 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
970 | if (htab == NULL) |
971 | return FALSE; | |
972 | ||
3d4d4302 | 973 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
c434dee6 | 974 | if (!info->shared) |
3d4d4302 | 975 | htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); |
c434dee6 | 976 | |
6de2ae4a | 977 | if (!htab->sdynbss |
c434dee6 AJ |
978 | || (!info->shared && !htab->srelbss)) |
979 | abort (); | |
980 | ||
e41b3a13 | 981 | if (!info->no_ld_generated_unwind_info |
2fe0fd06 | 982 | && htab->plt_eh_frame == NULL |
e4de50d4 | 983 | && htab->elf.splt != NULL) |
e41b3a13 | 984 | { |
bbf96e4e L |
985 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
986 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
987 | | SEC_LINKER_CREATED); | |
e41b3a13 | 988 | htab->plt_eh_frame |
bbf96e4e | 989 | = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags); |
e41b3a13 JJ |
990 | if (htab->plt_eh_frame == NULL |
991 | || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3)) | |
992 | return FALSE; | |
e41b3a13 | 993 | } |
b34976b6 | 994 | return TRUE; |
c434dee6 AJ |
995 | } |
996 | ||
997 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
998 | ||
999 | static void | |
351f65ca L |
1000 | elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
1001 | struct elf_link_hash_entry *dir, | |
1002 | struct elf_link_hash_entry *ind) | |
c434dee6 | 1003 | { |
351f65ca | 1004 | struct elf_x86_64_link_hash_entry *edir, *eind; |
c434dee6 | 1005 | |
351f65ca L |
1006 | edir = (struct elf_x86_64_link_hash_entry *) dir; |
1007 | eind = (struct elf_x86_64_link_hash_entry *) ind; | |
c434dee6 AJ |
1008 | |
1009 | if (eind->dyn_relocs != NULL) | |
1010 | { | |
1011 | if (edir->dyn_relocs != NULL) | |
1012 | { | |
e03a8ed8 L |
1013 | struct elf_dyn_relocs **pp; |
1014 | struct elf_dyn_relocs *p; | |
c434dee6 | 1015 | |
fcfa13d2 | 1016 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
1017 | list. Merge any entries against the same section. */ |
1018 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1019 | { | |
e03a8ed8 | 1020 | struct elf_dyn_relocs *q; |
c434dee6 AJ |
1021 | |
1022 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1023 | if (q->sec == p->sec) | |
1024 | { | |
1025 | q->pc_count += p->pc_count; | |
1026 | q->count += p->count; | |
1027 | *pp = p->next; | |
1028 | break; | |
1029 | } | |
1030 | if (q == NULL) | |
1031 | pp = &p->next; | |
1032 | } | |
1033 | *pp = edir->dyn_relocs; | |
1034 | } | |
1035 | ||
1036 | edir->dyn_relocs = eind->dyn_relocs; | |
1037 | eind->dyn_relocs = NULL; | |
1038 | } | |
1039 | ||
bffbf940 JJ |
1040 | if (ind->root.type == bfd_link_hash_indirect |
1041 | && dir->got.refcount <= 0) | |
1042 | { | |
1043 | edir->tls_type = eind->tls_type; | |
1044 | eind->tls_type = GOT_UNKNOWN; | |
1045 | } | |
1046 | ||
d40d037c AJ |
1047 | if (ELIMINATE_COPY_RELOCS |
1048 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1049 | && dir->dynamic_adjusted) |
1050 | { | |
1051 | /* If called to transfer flags for a weakdef during processing | |
1052 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1053 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
1054 | dir->ref_dynamic |= ind->ref_dynamic; | |
1055 | dir->ref_regular |= ind->ref_regular; | |
1056 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1057 | dir->needs_plt |= ind->needs_plt; | |
1058 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1059 | } | |
d40d037c | 1060 | else |
fcfa13d2 | 1061 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
8d88c4ca NC |
1062 | } |
1063 | ||
b34976b6 | 1064 | static bfd_boolean |
27482721 | 1065 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 1066 | { |
8d88c4ca NC |
1067 | /* Set the right machine number for an x86-64 elf64 file. */ |
1068 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 1069 | return TRUE; |
8d88c4ca NC |
1070 | } |
1071 | ||
8059fb19 RM |
1072 | static bfd_boolean |
1073 | elf32_x86_64_elf_object_p (bfd *abfd) | |
1074 | { | |
1075 | /* Set the right machine number for an x86-64 elf32 file. */ | |
1076 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
1077 | return TRUE; | |
1078 | } | |
1079 | ||
142411ca L |
1080 | /* Return TRUE if the TLS access code sequence support transition |
1081 | from R_TYPE. */ | |
1082 | ||
1083 | static bfd_boolean | |
351f65ca L |
1084 | elf_x86_64_check_tls_transition (bfd *abfd, |
1085 | struct bfd_link_info *info, | |
1086 | asection *sec, | |
1087 | bfd_byte *contents, | |
1088 | Elf_Internal_Shdr *symtab_hdr, | |
1089 | struct elf_link_hash_entry **sym_hashes, | |
1090 | unsigned int r_type, | |
1091 | const Elf_Internal_Rela *rel, | |
1092 | const Elf_Internal_Rela *relend) | |
bffbf940 | 1093 | { |
142411ca L |
1094 | unsigned int val; |
1095 | unsigned long r_symndx; | |
1096 | struct elf_link_hash_entry *h; | |
1097 | bfd_vma offset; | |
351f65ca | 1098 | struct elf_x86_64_link_hash_table *htab; |
142411ca L |
1099 | |
1100 | /* Get the section contents. */ | |
1101 | if (contents == NULL) | |
1102 | { | |
1103 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1104 | contents = elf_section_data (sec)->this_hdr.contents; | |
1105 | else | |
1106 | { | |
1107 | /* FIXME: How to better handle error condition? */ | |
1108 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1109 | return FALSE; | |
bffbf940 | 1110 | |
142411ca L |
1111 | /* Cache the section contents for elf_link_input_bfd. */ |
1112 | elf_section_data (sec)->this_hdr.contents = contents; | |
1113 | } | |
1114 | } | |
1115 | ||
351f65ca | 1116 | htab = elf_x86_64_hash_table (info); |
142411ca | 1117 | offset = rel->r_offset; |
bffbf940 | 1118 | switch (r_type) |
142411ca L |
1119 | { |
1120 | case R_X86_64_TLSGD: | |
1121 | case R_X86_64_TLSLD: | |
1122 | if ((rel + 1) >= relend) | |
1123 | return FALSE; | |
1124 | ||
1125 | if (r_type == R_X86_64_TLSGD) | |
1126 | { | |
52bc799a | 1127 | /* Check transition from GD access model. For 64bit, only |
142411ca L |
1128 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
1129 | .word 0x6666; rex64; call __tls_get_addr | |
52bc799a L |
1130 | can transit to different access model. For 32bit, only |
1131 | leaq foo@tlsgd(%rip), %rdi | |
1132 | .word 0x6666; rex64; call __tls_get_addr | |
142411ca L |
1133 | can transit to different access model. */ |
1134 | ||
fa289a5f AM |
1135 | static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 }; |
1136 | static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d }; | |
1137 | ||
52bc799a | 1138 | if ((offset + 12) > sec->size |
fa289a5f | 1139 | || memcmp (contents + offset + 4, call, 4) != 0) |
142411ca | 1140 | return FALSE; |
52bc799a L |
1141 | |
1142 | if (ABI_64_P (abfd)) | |
1143 | { | |
52bc799a | 1144 | if (offset < 4 |
fa289a5f | 1145 | || memcmp (contents + offset - 4, leaq, 4) != 0) |
52bc799a L |
1146 | return FALSE; |
1147 | } | |
1148 | else | |
1149 | { | |
52bc799a | 1150 | if (offset < 3 |
fa289a5f | 1151 | || memcmp (contents + offset - 3, leaq + 1, 3) != 0) |
52bc799a L |
1152 | return FALSE; |
1153 | } | |
142411ca L |
1154 | } |
1155 | else | |
1156 | { | |
1157 | /* Check transition from LD access model. Only | |
1158 | leaq foo@tlsld(%rip), %rdi; | |
1159 | call __tls_get_addr | |
1160 | can transit to different access model. */ | |
1161 | ||
fa289a5f | 1162 | static const unsigned char lea[] = { 0x48, 0x8d, 0x3d }; |
142411ca L |
1163 | |
1164 | if (offset < 3 || (offset + 9) > sec->size) | |
1165 | return FALSE; | |
1166 | ||
fa289a5f AM |
1167 | if (memcmp (contents + offset - 3, lea, 3) != 0 |
1168 | || 0xe8 != *(contents + offset + 4)) | |
142411ca L |
1169 | return FALSE; |
1170 | } | |
1171 | ||
351f65ca | 1172 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
1173 | if (r_symndx < symtab_hdr->sh_info) |
1174 | return FALSE; | |
1175 | ||
1176 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
c4fb387b | 1177 | /* Use strncmp to check __tls_get_addr since __tls_get_addr |
eed180f8 | 1178 | may be versioned. */ |
142411ca L |
1179 | return (h != NULL |
1180 | && h->root.root.string != NULL | |
351f65ca L |
1181 | && (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32 |
1182 | || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32) | |
c4fb387b L |
1183 | && (strncmp (h->root.root.string, |
1184 | "__tls_get_addr", 14) == 0)); | |
142411ca L |
1185 | |
1186 | case R_X86_64_GOTTPOFF: | |
1187 | /* Check transition from IE access model: | |
4a4c5f25 L |
1188 | mov foo@gottpoff(%rip), %reg |
1189 | add foo@gottpoff(%rip), %reg | |
142411ca L |
1190 | */ |
1191 | ||
4a4c5f25 L |
1192 | /* Check REX prefix first. */ |
1193 | if (offset >= 3 && (offset + 4) <= sec->size) | |
1194 | { | |
1195 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1196 | if (val != 0x48 && val != 0x4c) | |
1197 | { | |
1198 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
1199 | if (ABI_64_P (abfd)) | |
1200 | return FALSE; | |
1201 | } | |
1202 | } | |
1203 | else | |
1204 | { | |
1205 | /* X32 may not have any REX prefix. */ | |
1206 | if (ABI_64_P (abfd)) | |
1207 | return FALSE; | |
1208 | if (offset < 2 || (offset + 3) > sec->size) | |
1209 | return FALSE; | |
1210 | } | |
142411ca L |
1211 | |
1212 | val = bfd_get_8 (abfd, contents + offset - 2); | |
1213 | if (val != 0x8b && val != 0x03) | |
1214 | return FALSE; | |
1215 | ||
1216 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1217 | return (val & 0xc7) == 5; | |
1218 | ||
1219 | case R_X86_64_GOTPC32_TLSDESC: | |
1220 | /* Check transition from GDesc access model: | |
1221 | leaq x@tlsdesc(%rip), %rax | |
1222 | ||
1223 | Make sure it's a leaq adding rip to a 32-bit offset | |
1224 | into any register, although it's probably almost always | |
1225 | going to be rax. */ | |
1226 | ||
1227 | if (offset < 3 || (offset + 4) > sec->size) | |
1228 | return FALSE; | |
1229 | ||
1230 | val = bfd_get_8 (abfd, contents + offset - 3); | |
1231 | if ((val & 0xfb) != 0x48) | |
1232 | return FALSE; | |
1233 | ||
1234 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1235 | return FALSE; | |
1236 | ||
1237 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1238 | return (val & 0xc7) == 0x05; | |
1239 | ||
1240 | case R_X86_64_TLSDESC_CALL: | |
1241 | /* Check transition from GDesc access model: | |
1242 | call *x@tlsdesc(%rax) | |
1243 | */ | |
1244 | if (offset + 2 <= sec->size) | |
1245 | { | |
1246 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
fa289a5f AM |
1247 | static const unsigned char call[] = { 0xff, 0x10 }; |
1248 | return memcmp (contents + offset, call, 2) == 0; | |
142411ca L |
1249 | } |
1250 | ||
1251 | return FALSE; | |
1252 | ||
1253 | default: | |
1254 | abort (); | |
1255 | } | |
1256 | } | |
1257 | ||
1258 | /* Return TRUE if the TLS access transition is OK or no transition | |
1259 | will be performed. Update R_TYPE if there is a transition. */ | |
1260 | ||
1261 | static bfd_boolean | |
351f65ca L |
1262 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1263 | asection *sec, bfd_byte *contents, | |
1264 | Elf_Internal_Shdr *symtab_hdr, | |
1265 | struct elf_link_hash_entry **sym_hashes, | |
1266 | unsigned int *r_type, int tls_type, | |
1267 | const Elf_Internal_Rela *rel, | |
1268 | const Elf_Internal_Rela *relend, | |
1269 | struct elf_link_hash_entry *h, | |
1270 | unsigned long r_symndx) | |
142411ca L |
1271 | { |
1272 | unsigned int from_type = *r_type; | |
1273 | unsigned int to_type = from_type; | |
1274 | bfd_boolean check = TRUE; | |
1275 | ||
bb1cb422 L |
1276 | /* Skip TLS transition for functions. */ |
1277 | if (h != NULL | |
1278 | && (h->type == STT_FUNC | |
1279 | || h->type == STT_GNU_IFUNC)) | |
1280 | return TRUE; | |
1281 | ||
142411ca | 1282 | switch (from_type) |
bffbf940 JJ |
1283 | { |
1284 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1285 | case R_X86_64_GOTPC32_TLSDESC: |
1286 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1287 | case R_X86_64_GOTTPOFF: |
1d85728f | 1288 | if (info->executable) |
142411ca L |
1289 | { |
1290 | if (h == NULL) | |
1291 | to_type = R_X86_64_TPOFF32; | |
1292 | else | |
1293 | to_type = R_X86_64_GOTTPOFF; | |
1294 | } | |
1295 | ||
351f65ca | 1296 | /* When we are called from elf_x86_64_relocate_section, |
142411ca L |
1297 | CONTENTS isn't NULL and there may be additional transitions |
1298 | based on TLS_TYPE. */ | |
1299 | if (contents != NULL) | |
1300 | { | |
1301 | unsigned int new_to_type = to_type; | |
1302 | ||
1d85728f | 1303 | if (info->executable |
142411ca L |
1304 | && h != NULL |
1305 | && h->dynindx == -1 | |
1306 | && tls_type == GOT_TLS_IE) | |
1307 | new_to_type = R_X86_64_TPOFF32; | |
1308 | ||
1309 | if (to_type == R_X86_64_TLSGD | |
1310 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1311 | || to_type == R_X86_64_TLSDESC_CALL) | |
1312 | { | |
1313 | if (tls_type == GOT_TLS_IE) | |
1314 | new_to_type = R_X86_64_GOTTPOFF; | |
1315 | } | |
1316 | ||
1317 | /* We checked the transition before when we were called from | |
351f65ca | 1318 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1319 | transition which hasn't been checked before. */ |
1320 | check = new_to_type != to_type && from_type == to_type; | |
1321 | to_type = new_to_type; | |
1322 | } | |
1323 | ||
1324 | break; | |
1325 | ||
bffbf940 | 1326 | case R_X86_64_TLSLD: |
1d85728f | 1327 | if (info->executable) |
142411ca L |
1328 | to_type = R_X86_64_TPOFF32; |
1329 | break; | |
1330 | ||
1331 | default: | |
1332 | return TRUE; | |
bffbf940 JJ |
1333 | } |
1334 | ||
142411ca L |
1335 | /* Return TRUE if there is no transition. */ |
1336 | if (from_type == to_type) | |
1337 | return TRUE; | |
1338 | ||
1339 | /* Check if the transition can be performed. */ | |
1340 | if (check | |
351f65ca L |
1341 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1342 | symtab_hdr, sym_hashes, | |
1343 | from_type, rel, relend)) | |
142411ca | 1344 | { |
2f629d23 | 1345 | reloc_howto_type *from, *to; |
4c544807 | 1346 | const char *name; |
142411ca | 1347 | |
351f65ca L |
1348 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1349 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1350 | |
4c544807 L |
1351 | if (h) |
1352 | name = h->root.root.string; | |
1353 | else | |
1354 | { | |
351f65ca | 1355 | struct elf_x86_64_link_hash_table *htab; |
4dfe6ac6 | 1356 | |
351f65ca | 1357 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1358 | if (htab == NULL) |
1359 | name = "*unknown*"; | |
1360 | else | |
1361 | { | |
1362 | Elf_Internal_Sym *isym; | |
1363 | ||
1364 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1365 | abfd, r_symndx); | |
1366 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1367 | } | |
4c544807 L |
1368 | } |
1369 | ||
142411ca L |
1370 | (*_bfd_error_handler) |
1371 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1372 | "in section `%A' failed"), | |
4c544807 | 1373 | abfd, sec, from->name, to->name, name, |
142411ca L |
1374 | (unsigned long) rel->r_offset); |
1375 | bfd_set_error (bfd_error_bad_value); | |
1376 | return FALSE; | |
1377 | } | |
1378 | ||
1379 | *r_type = to_type; | |
1380 | return TRUE; | |
bffbf940 JJ |
1381 | } |
1382 | ||
70256ad8 | 1383 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1384 | calculate needed space in the global offset table, procedure |
1385 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1386 | |
b34976b6 | 1387 | static bfd_boolean |
351f65ca L |
1388 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1389 | asection *sec, | |
1390 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1391 | { |
351f65ca | 1392 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1393 | Elf_Internal_Shdr *symtab_hdr; |
1394 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1395 | const Elf_Internal_Rela *rel; |
1396 | const Elf_Internal_Rela *rel_end; | |
70256ad8 AJ |
1397 | asection *sreloc; |
1398 | ||
1049f94e | 1399 | if (info->relocatable) |
b34976b6 | 1400 | return TRUE; |
70256ad8 | 1401 | |
0ffa91dd NC |
1402 | BFD_ASSERT (is_x86_64_elf (abfd)); |
1403 | ||
351f65ca | 1404 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1405 | if (htab == NULL) |
1406 | return FALSE; | |
1407 | ||
0ffa91dd | 1408 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1409 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1410 | |
c434dee6 | 1411 | sreloc = NULL; |
cbe950e9 | 1412 | |
70256ad8 AJ |
1413 | rel_end = relocs + sec->reloc_count; |
1414 | for (rel = relocs; rel < rel_end; rel++) | |
1415 | { | |
bffbf940 | 1416 | unsigned int r_type; |
70256ad8 AJ |
1417 | unsigned long r_symndx; |
1418 | struct elf_link_hash_entry *h; | |
4c544807 L |
1419 | Elf_Internal_Sym *isym; |
1420 | const char *name; | |
70256ad8 | 1421 | |
351f65ca L |
1422 | r_symndx = htab->r_sym (rel->r_info); |
1423 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1424 | |
1425 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1426 | { | |
d003868e AM |
1427 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1428 | abfd, r_symndx); | |
b34976b6 | 1429 | return FALSE; |
c434dee6 AJ |
1430 | } |
1431 | ||
70256ad8 | 1432 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1433 | { |
1434 | /* A local symbol. */ | |
c2e61a4e L |
1435 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1436 | abfd, r_symndx); | |
1437 | if (isym == NULL) | |
1438 | return FALSE; | |
c25bc9fc L |
1439 | |
1440 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1441 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1442 | { |
351f65ca L |
1443 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, |
1444 | TRUE); | |
c25bc9fc | 1445 | if (h == NULL) |
c2e61a4e | 1446 | return FALSE; |
6bbec505 | 1447 | |
c25bc9fc L |
1448 | /* Fake a STT_GNU_IFUNC symbol. */ |
1449 | h->type = STT_GNU_IFUNC; | |
1450 | h->def_regular = 1; | |
1451 | h->ref_regular = 1; | |
1452 | h->forced_local = 1; | |
1453 | h->root.type = bfd_link_hash_defined; | |
1454 | } | |
1455 | else | |
1456 | h = NULL; | |
1457 | } | |
70256ad8 | 1458 | else |
71cb9464 | 1459 | { |
4c544807 | 1460 | isym = NULL; |
71cb9464 L |
1461 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1462 | while (h->root.type == bfd_link_hash_indirect | |
1463 | || h->root.type == bfd_link_hash_warning) | |
1464 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1465 | } |
cbe950e9 | 1466 | |
d1534d16 L |
1467 | /* Check invalid x32 relocations. */ |
1468 | if (!ABI_64_P (abfd)) | |
1469 | switch (r_type) | |
1470 | { | |
1471 | default: | |
1472 | break; | |
1473 | ||
d1534d16 L |
1474 | case R_X86_64_DTPOFF64: |
1475 | case R_X86_64_TPOFF64: | |
1476 | case R_X86_64_PC64: | |
1477 | case R_X86_64_GOTOFF64: | |
1478 | case R_X86_64_GOT64: | |
1479 | case R_X86_64_GOTPCREL64: | |
1480 | case R_X86_64_GOTPC64: | |
1481 | case R_X86_64_GOTPLT64: | |
1482 | case R_X86_64_PLTOFF64: | |
1483 | { | |
1484 | if (h) | |
1485 | name = h->root.root.string; | |
1486 | else | |
1487 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1488 | NULL); | |
1489 | (*_bfd_error_handler) | |
1490 | (_("%B: relocation %s against symbol `%s' isn't " | |
1491 | "supported in x32 mode"), abfd, | |
1492 | x86_64_elf_howto_table[r_type].name, name); | |
1493 | bfd_set_error (bfd_error_bad_value); | |
1494 | return FALSE; | |
1495 | } | |
1496 | break; | |
1497 | } | |
1498 | ||
c25bc9fc L |
1499 | if (h != NULL) |
1500 | { | |
cbe950e9 L |
1501 | /* Create the ifunc sections for static executables. If we |
1502 | never see an indirect function symbol nor we are building | |
1503 | a static executable, those sections will be empty and | |
1504 | won't appear in output. */ | |
1505 | switch (r_type) | |
1506 | { | |
1507 | default: | |
1508 | break; | |
1509 | ||
1510 | case R_X86_64_32S: | |
1511 | case R_X86_64_32: | |
1512 | case R_X86_64_64: | |
1513 | case R_X86_64_PC32: | |
1514 | case R_X86_64_PC64: | |
1515 | case R_X86_64_PLT32: | |
1516 | case R_X86_64_GOTPCREL: | |
1517 | case R_X86_64_GOTPCREL64: | |
9d4057ee AM |
1518 | if (htab->elf.dynobj == NULL) |
1519 | htab->elf.dynobj = abfd; | |
1520 | if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) | |
c2e61a4e | 1521 | return FALSE; |
cbe950e9 L |
1522 | break; |
1523 | } | |
1524 | ||
1525 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle | |
1526 | it here if it is defined in a non-shared object. */ | |
1527 | if (h->type == STT_GNU_IFUNC | |
1528 | && h->def_regular) | |
1529 | { | |
1530 | /* It is referenced by a non-shared object. */ | |
1531 | h->ref_regular = 1; | |
7ae26bc1 | 1532 | h->needs_plt = 1; |
6bbec505 | 1533 | |
cbe950e9 L |
1534 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
1535 | h->plt.refcount += 1; | |
1536 | ||
1537 | /* STT_GNU_IFUNC needs dynamic sections. */ | |
1538 | if (htab->elf.dynobj == NULL) | |
1539 | htab->elf.dynobj = abfd; | |
1540 | ||
1541 | switch (r_type) | |
1542 | { | |
048cbda4 | 1543 | default: |
4c544807 L |
1544 | if (h->root.root.string) |
1545 | name = h->root.root.string; | |
1546 | else | |
1547 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1548 | NULL); | |
048cbda4 L |
1549 | (*_bfd_error_handler) |
1550 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
1551 | "symbol `%s' isn't handled by %s"), abfd, | |
1552 | x86_64_elf_howto_table[r_type].name, | |
4c544807 | 1553 | name, __FUNCTION__); |
048cbda4 | 1554 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1555 | return FALSE; |
cbe950e9 | 1556 | |
248775ba L |
1557 | case R_X86_64_32: |
1558 | if (ABI_64_P (abfd)) | |
1559 | goto not_pointer; | |
710ab287 L |
1560 | case R_X86_64_64: |
1561 | h->non_got_ref = 1; | |
1562 | h->pointer_equality_needed = 1; | |
1563 | if (info->shared) | |
1564 | { | |
710ab287 L |
1565 | /* We must copy these reloc types into the output |
1566 | file. Create a reloc section in dynobj and | |
1567 | make room for this reloc. */ | |
e03a8ed8 L |
1568 | sreloc = _bfd_elf_create_ifunc_dyn_reloc |
1569 | (abfd, info, sec, sreloc, | |
351f65ca | 1570 | &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs); |
710ab287 | 1571 | if (sreloc == NULL) |
c2e61a4e | 1572 | return FALSE; |
710ab287 L |
1573 | } |
1574 | break; | |
1575 | ||
cbe950e9 | 1576 | case R_X86_64_32S: |
cbe950e9 L |
1577 | case R_X86_64_PC32: |
1578 | case R_X86_64_PC64: | |
248775ba | 1579 | not_pointer: |
cbe950e9 L |
1580 | h->non_got_ref = 1; |
1581 | if (r_type != R_X86_64_PC32 | |
1582 | && r_type != R_X86_64_PC64) | |
1583 | h->pointer_equality_needed = 1; | |
1584 | break; | |
1585 | ||
1586 | case R_X86_64_PLT32: | |
1587 | break; | |
1588 | ||
1589 | case R_X86_64_GOTPCREL: | |
1590 | case R_X86_64_GOTPCREL64: | |
7afd84dc | 1591 | h->got.refcount += 1; |
6de2ae4a L |
1592 | if (htab->elf.sgot == NULL |
1593 | && !_bfd_elf_create_got_section (htab->elf.dynobj, | |
1594 | info)) | |
c2e61a4e | 1595 | return FALSE; |
cbe950e9 L |
1596 | break; |
1597 | } | |
1598 | ||
1599 | continue; | |
1600 | } | |
71cb9464 | 1601 | } |
70256ad8 | 1602 | |
351f65ca L |
1603 | if (! elf_x86_64_tls_transition (info, abfd, sec, NULL, |
1604 | symtab_hdr, sym_hashes, | |
1605 | &r_type, GOT_UNKNOWN, | |
1606 | rel, rel_end, h, r_symndx)) | |
c2e61a4e | 1607 | return FALSE; |
142411ca | 1608 | |
bffbf940 | 1609 | switch (r_type) |
70256ad8 | 1610 | { |
bffbf940 JJ |
1611 | case R_X86_64_TLSLD: |
1612 | htab->tls_ld_got.refcount += 1; | |
1613 | goto create_got; | |
1614 | ||
1615 | case R_X86_64_TPOFF32: | |
351f65ca | 1616 | if (!info->executable && ABI_64_P (abfd)) |
70256ad8 | 1617 | { |
09a24cbf | 1618 | if (h) |
4c544807 L |
1619 | name = h->root.root.string; |
1620 | else | |
1621 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1622 | NULL); | |
bffbf940 | 1623 | (*_bfd_error_handler) |
d003868e AM |
1624 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
1625 | abfd, | |
4c544807 | 1626 | x86_64_elf_howto_table[r_type].name, name); |
bffbf940 | 1627 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1628 | return FALSE; |
70256ad8 | 1629 | } |
bffbf940 | 1630 | break; |
c434dee6 | 1631 | |
bffbf940 | 1632 | case R_X86_64_GOTTPOFF: |
1d85728f | 1633 | if (!info->executable) |
bffbf940 JJ |
1634 | info->flags |= DF_STATIC_TLS; |
1635 | /* Fall through */ | |
70256ad8 | 1636 | |
bffbf940 JJ |
1637 | case R_X86_64_GOT32: |
1638 | case R_X86_64_GOTPCREL: | |
1639 | case R_X86_64_TLSGD: | |
7b81dfbb AJ |
1640 | case R_X86_64_GOT64: |
1641 | case R_X86_64_GOTPCREL64: | |
1642 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
1643 | case R_X86_64_GOTPC32_TLSDESC: |
1644 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
1645 | /* This symbol requires a global offset table entry. */ |
1646 | { | |
1647 | int tls_type, old_tls_type; | |
1648 | ||
1649 | switch (r_type) | |
1650 | { | |
1651 | default: tls_type = GOT_NORMAL; break; | |
1652 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
1653 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
1654 | case R_X86_64_GOTPC32_TLSDESC: |
1655 | case R_X86_64_TLSDESC_CALL: | |
1656 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
1657 | } |
1658 | ||
1659 | if (h != NULL) | |
1660 | { | |
7b81dfbb AJ |
1661 | if (r_type == R_X86_64_GOTPLT64) |
1662 | { | |
1663 | /* This relocation indicates that we also need | |
1664 | a PLT entry, as this is a function. We don't need | |
1665 | a PLT entry for local symbols. */ | |
1666 | h->needs_plt = 1; | |
1667 | h->plt.refcount += 1; | |
1668 | } | |
bffbf940 | 1669 | h->got.refcount += 1; |
351f65ca | 1670 | old_tls_type = elf_x86_64_hash_entry (h)->tls_type; |
bffbf940 JJ |
1671 | } |
1672 | else | |
1673 | { | |
1674 | bfd_signed_vma *local_got_refcounts; | |
1675 | ||
1676 | /* This is a global offset table entry for a local symbol. */ | |
1677 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1678 | if (local_got_refcounts == NULL) | |
1679 | { | |
1680 | bfd_size_type size; | |
1681 | ||
1682 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1683 | size *= sizeof (bfd_signed_vma) |
1684 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
1685 | local_got_refcounts = ((bfd_signed_vma *) |
1686 | bfd_zalloc (abfd, size)); | |
1687 | if (local_got_refcounts == NULL) | |
c2e61a4e | 1688 | return FALSE; |
bffbf940 | 1689 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
351f65ca | 1690 | elf_x86_64_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 1691 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
351f65ca | 1692 | elf_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 1693 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
1694 | } |
1695 | local_got_refcounts[r_symndx] += 1; | |
1696 | old_tls_type | |
351f65ca | 1697 | = elf_x86_64_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
1698 | } |
1699 | ||
1700 | /* If a TLS symbol is accessed using IE at least once, | |
1701 | there is no point to use dynamic model for it. */ | |
1702 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
1703 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
1704 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 1705 | { |
67a4f2b7 | 1706 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 1707 | tls_type = old_tls_type; |
67a4f2b7 AO |
1708 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1709 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1710 | tls_type |= old_tls_type; | |
bffbf940 JJ |
1711 | else |
1712 | { | |
09a24cbf | 1713 | if (h) |
4c544807 L |
1714 | name = h->root.root.string; |
1715 | else | |
1716 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
1717 | isym, NULL); | |
bffbf940 | 1718 | (*_bfd_error_handler) |
1f7a4e42 | 1719 | (_("%B: '%s' accessed both as normal and thread local symbol"), |
4c544807 | 1720 | abfd, name); |
c2e61a4e | 1721 | return FALSE; |
bffbf940 JJ |
1722 | } |
1723 | } | |
1724 | ||
1725 | if (old_tls_type != tls_type) | |
1726 | { | |
1727 | if (h != NULL) | |
351f65ca | 1728 | elf_x86_64_hash_entry (h)->tls_type = tls_type; |
bffbf940 | 1729 | else |
351f65ca | 1730 | elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
1731 | } |
1732 | } | |
c434dee6 AJ |
1733 | /* Fall through */ |
1734 | ||
d6ab8113 JB |
1735 | case R_X86_64_GOTOFF64: |
1736 | case R_X86_64_GOTPC32: | |
7b81dfbb | 1737 | case R_X86_64_GOTPC64: |
bffbf940 | 1738 | create_got: |
6de2ae4a | 1739 | if (htab->elf.sgot == NULL) |
c434dee6 AJ |
1740 | { |
1741 | if (htab->elf.dynobj == NULL) | |
1742 | htab->elf.dynobj = abfd; | |
6de2ae4a L |
1743 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, |
1744 | info)) | |
c2e61a4e | 1745 | return FALSE; |
c434dee6 | 1746 | } |
70256ad8 AJ |
1747 | break; |
1748 | ||
1749 | case R_X86_64_PLT32: | |
1750 | /* This symbol requires a procedure linkage table entry. We | |
407443a3 AJ |
1751 | actually build the entry in adjust_dynamic_symbol, |
1752 | because this might be a case of linking PIC code which is | |
1753 | never referenced by a dynamic object, in which case we | |
1754 | don't need to generate a procedure linkage table entry | |
1755 | after all. */ | |
70256ad8 AJ |
1756 | |
1757 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 1758 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
1759 | if (h == NULL) |
1760 | continue; | |
1761 | ||
f5385ebf | 1762 | h->needs_plt = 1; |
51b64d56 | 1763 | h->plt.refcount += 1; |
70256ad8 AJ |
1764 | break; |
1765 | ||
7b81dfbb AJ |
1766 | case R_X86_64_PLTOFF64: |
1767 | /* This tries to form the 'address' of a function relative | |
1768 | to GOT. For global symbols we need a PLT entry. */ | |
1769 | if (h != NULL) | |
1770 | { | |
1771 | h->needs_plt = 1; | |
1772 | h->plt.refcount += 1; | |
1773 | } | |
1774 | goto create_got; | |
1775 | ||
248775ba L |
1776 | case R_X86_64_32: |
1777 | if (!ABI_64_P (abfd)) | |
1778 | goto pointer; | |
cc78d0af AJ |
1779 | case R_X86_64_8: |
1780 | case R_X86_64_16: | |
70256ad8 | 1781 | case R_X86_64_32S: |
1b71fb54 AJ |
1782 | /* Let's help debug shared library creation. These relocs |
1783 | cannot be used in shared libs. Don't error out for | |
1784 | sections we don't care about, such as debug sections or | |
1785 | non-constant sections. */ | |
1786 | if (info->shared | |
1787 | && (sec->flags & SEC_ALLOC) != 0 | |
1788 | && (sec->flags & SEC_READONLY) != 0) | |
1789 | { | |
09a24cbf | 1790 | if (h) |
4c544807 L |
1791 | name = h->root.root.string; |
1792 | else | |
1793 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1b71fb54 | 1794 | (*_bfd_error_handler) |
d003868e | 1795 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
4c544807 | 1796 | abfd, x86_64_elf_howto_table[r_type].name, name); |
1b71fb54 | 1797 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1798 | return FALSE; |
1b71fb54 AJ |
1799 | } |
1800 | /* Fall through. */ | |
1801 | ||
c434dee6 AJ |
1802 | case R_X86_64_PC8: |
1803 | case R_X86_64_PC16: | |
70256ad8 | 1804 | case R_X86_64_PC32: |
d6ab8113 | 1805 | case R_X86_64_PC64: |
1b71fb54 | 1806 | case R_X86_64_64: |
248775ba | 1807 | pointer: |
710ab287 | 1808 | if (h != NULL && info->executable) |
c434dee6 AJ |
1809 | { |
1810 | /* If this reloc is in a read-only section, we might | |
1811 | need a copy reloc. We can't check reliably at this | |
1812 | stage whether the section is read-only, as input | |
1813 | sections have not yet been mapped to output sections. | |
1814 | Tentatively set the flag for now, and correct in | |
1815 | adjust_dynamic_symbol. */ | |
f5385ebf | 1816 | h->non_got_ref = 1; |
c434dee6 AJ |
1817 | |
1818 | /* We may need a .plt entry if the function this reloc | |
1819 | refers to is in a shared lib. */ | |
1820 | h->plt.refcount += 1; | |
d6ab8113 | 1821 | if (r_type != R_X86_64_PC32 && r_type != R_X86_64_PC64) |
f5385ebf | 1822 | h->pointer_equality_needed = 1; |
c434dee6 | 1823 | } |
70256ad8 AJ |
1824 | |
1825 | /* If we are creating a shared library, and this is a reloc | |
1826 | against a global symbol, or a non PC relative reloc | |
1827 | against a local symbol, then we need to copy the reloc | |
1828 | into the shared library. However, if we are linking with | |
1829 | -Bsymbolic, we do not need to copy a reloc against a | |
1830 | global symbol which is defined in an object we are | |
407443a3 | 1831 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
1832 | this point we have not seen all the input files, so it is |
1833 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
1834 | later (it is never cleared). In case of a weak definition, |
1835 | DEF_REGULAR may be cleared later by a strong definition in | |
1836 | a shared library. We account for that possibility below by | |
1837 | storing information in the relocs_copied field of the hash | |
1838 | table entry. A similar situation occurs when creating | |
1839 | shared libraries and symbol visibility changes render the | |
1840 | symbol local. | |
1841 | ||
1842 | If on the other hand, we are creating an executable, we | |
1843 | may need to keep relocations for symbols satisfied by a | |
1844 | dynamic library if we manage to avoid copy relocs for the | |
0f88be7a | 1845 | symbol. */ |
c434dee6 AJ |
1846 | if ((info->shared |
1847 | && (sec->flags & SEC_ALLOC) != 0 | |
d8045f23 | 1848 | && (! IS_X86_64_PCREL_TYPE (r_type) |
c434dee6 | 1849 | || (h != NULL |
55255dae | 1850 | && (! SYMBOLIC_BIND (info, h) |
c434dee6 | 1851 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1852 | || !h->def_regular)))) |
d40d037c AJ |
1853 | || (ELIMINATE_COPY_RELOCS |
1854 | && !info->shared | |
c434dee6 AJ |
1855 | && (sec->flags & SEC_ALLOC) != 0 |
1856 | && h != NULL | |
1857 | && (h->root.type == bfd_link_hash_defweak | |
0f88be7a | 1858 | || !h->def_regular))) |
70256ad8 | 1859 | { |
e03a8ed8 L |
1860 | struct elf_dyn_relocs *p; |
1861 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
1862 | |
1863 | /* We must copy these reloc types into the output file. | |
1864 | Create a reloc section in dynobj and make room for | |
1865 | this reloc. */ | |
70256ad8 AJ |
1866 | if (sreloc == NULL) |
1867 | { | |
c434dee6 AJ |
1868 | if (htab->elf.dynobj == NULL) |
1869 | htab->elf.dynobj = abfd; | |
1870 | ||
83bac4b0 | 1871 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
1872 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
1873 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 1874 | |
70256ad8 | 1875 | if (sreloc == NULL) |
c2e61a4e | 1876 | return FALSE; |
70256ad8 AJ |
1877 | } |
1878 | ||
c434dee6 AJ |
1879 | /* If this is a global symbol, we count the number of |
1880 | relocations we need for this symbol. */ | |
1881 | if (h != NULL) | |
70256ad8 | 1882 | { |
351f65ca | 1883 | head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs; |
c434dee6 AJ |
1884 | } |
1885 | else | |
1886 | { | |
1887 | /* Track dynamic relocs needed for local syms too. | |
1888 | We really need local syms available to do this | |
1889 | easily. Oh well. */ | |
c434dee6 | 1890 | asection *s; |
87d72d41 | 1891 | void **vpp; |
87d72d41 AM |
1892 | |
1893 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1894 | abfd, r_symndx); | |
1895 | if (isym == NULL) | |
1896 | return FALSE; | |
1897 | ||
1898 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 1899 | if (s == NULL) |
87d72d41 | 1900 | s = sec; |
70256ad8 | 1901 | |
e81d3500 DD |
1902 | /* Beware of type punned pointers vs strict aliasing |
1903 | rules. */ | |
1904 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 1905 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 1906 | } |
70256ad8 | 1907 | |
c434dee6 AJ |
1908 | p = *head; |
1909 | if (p == NULL || p->sec != sec) | |
1910 | { | |
1911 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 1912 | |
e03a8ed8 | 1913 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 1914 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 1915 | if (p == NULL) |
c2e61a4e | 1916 | return FALSE; |
c434dee6 AJ |
1917 | p->next = *head; |
1918 | *head = p; | |
1919 | p->sec = sec; | |
1920 | p->count = 0; | |
1921 | p->pc_count = 0; | |
70256ad8 | 1922 | } |
c434dee6 AJ |
1923 | |
1924 | p->count += 1; | |
d8045f23 | 1925 | if (IS_X86_64_PCREL_TYPE (r_type)) |
c434dee6 | 1926 | p->pc_count += 1; |
70256ad8 AJ |
1927 | } |
1928 | break; | |
fe4770f4 AJ |
1929 | |
1930 | /* This relocation describes the C++ object vtable hierarchy. | |
1931 | Reconstruct it for later use during GC. */ | |
1932 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 1933 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c2e61a4e | 1934 | return FALSE; |
fe4770f4 AJ |
1935 | break; |
1936 | ||
1937 | /* This relocation describes which C++ vtable entries are actually | |
1938 | used. Record for later use during GC. */ | |
1939 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
1940 | BFD_ASSERT (h != NULL); |
1941 | if (h != NULL | |
1942 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
c2e61a4e | 1943 | return FALSE; |
fe4770f4 | 1944 | break; |
c434dee6 AJ |
1945 | |
1946 | default: | |
1947 | break; | |
70256ad8 AJ |
1948 | } |
1949 | } | |
1950 | ||
b34976b6 | 1951 | return TRUE; |
70256ad8 AJ |
1952 | } |
1953 | ||
1954 | /* Return the section that should be marked against GC for a given | |
407443a3 | 1955 | relocation. */ |
70256ad8 AJ |
1956 | |
1957 | static asection * | |
351f65ca L |
1958 | elf_x86_64_gc_mark_hook (asection *sec, |
1959 | struct bfd_link_info *info, | |
1960 | Elf_Internal_Rela *rel, | |
1961 | struct elf_link_hash_entry *h, | |
1962 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
1963 | { |
1964 | if (h != NULL) | |
351f65ca | 1965 | switch (ELF32_R_TYPE (rel->r_info)) |
07adf181 AM |
1966 | { |
1967 | case R_X86_64_GNU_VTINHERIT: | |
1968 | case R_X86_64_GNU_VTENTRY: | |
1969 | return NULL; | |
1970 | } | |
1971 | ||
1972 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
1973 | } |
1974 | ||
407443a3 | 1975 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 | 1976 | |
b34976b6 | 1977 | static bfd_boolean |
351f65ca L |
1978 | elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, |
1979 | asection *sec, | |
1980 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1981 | { |
351f65ca | 1982 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1983 | Elf_Internal_Shdr *symtab_hdr; |
1984 | struct elf_link_hash_entry **sym_hashes; | |
1985 | bfd_signed_vma *local_got_refcounts; | |
1986 | const Elf_Internal_Rela *rel, *relend; | |
c434dee6 | 1987 | |
7dda2462 TG |
1988 | if (info->relocatable) |
1989 | return TRUE; | |
1990 | ||
351f65ca | 1991 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1992 | if (htab == NULL) |
1993 | return FALSE; | |
1994 | ||
c434dee6 | 1995 | elf_section_data (sec)->local_dynrel = NULL; |
70256ad8 | 1996 | |
0ffa91dd | 1997 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 AJ |
1998 | sym_hashes = elf_sym_hashes (abfd); |
1999 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2000 | ||
351f65ca | 2001 | htab = elf_x86_64_hash_table (info); |
70256ad8 AJ |
2002 | relend = relocs + sec->reloc_count; |
2003 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
2004 | { |
2005 | unsigned long r_symndx; | |
2006 | unsigned int r_type; | |
2007 | struct elf_link_hash_entry *h = NULL; | |
70256ad8 | 2008 | |
351f65ca | 2009 | r_symndx = htab->r_sym (rel->r_info); |
26e41594 AM |
2010 | if (r_symndx >= symtab_hdr->sh_info) |
2011 | { | |
26e41594 | 2012 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
2013 | while (h->root.type == bfd_link_hash_indirect |
2014 | || h->root.type == bfd_link_hash_warning) | |
2015 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 2016 | } |
bb1cb422 L |
2017 | else |
2018 | { | |
2019 | /* A local symbol. */ | |
2020 | Elf_Internal_Sym *isym; | |
2021 | ||
2022 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2023 | abfd, r_symndx); | |
2024 | ||
2025 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
2026 | if (isym != NULL | |
82e96e07 | 2027 | && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
bb1cb422 | 2028 | { |
351f65ca | 2029 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE); |
bb1cb422 L |
2030 | if (h == NULL) |
2031 | abort (); | |
2032 | } | |
2033 | } | |
c434dee6 | 2034 | |
3db2e7dd L |
2035 | if (h) |
2036 | { | |
2037 | struct elf_x86_64_link_hash_entry *eh; | |
2038 | struct elf_dyn_relocs **pp; | |
2039 | struct elf_dyn_relocs *p; | |
2040 | ||
2041 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
2042 | ||
2043 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
2044 | if (p->sec == sec) | |
2045 | { | |
2046 | /* Everything must go for SEC. */ | |
2047 | *pp = p->next; | |
2048 | break; | |
2049 | } | |
2050 | } | |
2051 | ||
351f65ca L |
2052 | r_type = ELF32_R_TYPE (rel->r_info); |
2053 | if (! elf_x86_64_tls_transition (info, abfd, sec, NULL, | |
2054 | symtab_hdr, sym_hashes, | |
2055 | &r_type, GOT_UNKNOWN, | |
2056 | rel, relend, h, r_symndx)) | |
142411ca L |
2057 | return FALSE; |
2058 | ||
26e41594 AM |
2059 | switch (r_type) |
2060 | { | |
2061 | case R_X86_64_TLSLD: | |
4dfe6ac6 NC |
2062 | if (htab->tls_ld_got.refcount > 0) |
2063 | htab->tls_ld_got.refcount -= 1; | |
26e41594 | 2064 | break; |
c434dee6 | 2065 | |
26e41594 | 2066 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
2067 | case R_X86_64_GOTPC32_TLSDESC: |
2068 | case R_X86_64_TLSDESC_CALL: | |
26e41594 AM |
2069 | case R_X86_64_GOTTPOFF: |
2070 | case R_X86_64_GOT32: | |
2071 | case R_X86_64_GOTPCREL: | |
7b81dfbb AJ |
2072 | case R_X86_64_GOT64: |
2073 | case R_X86_64_GOTPCREL64: | |
2074 | case R_X86_64_GOTPLT64: | |
26e41594 AM |
2075 | if (h != NULL) |
2076 | { | |
7b81dfbb | 2077 | if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0) |
eed180f8 | 2078 | h->plt.refcount -= 1; |
26e41594 AM |
2079 | if (h->got.refcount > 0) |
2080 | h->got.refcount -= 1; | |
bb1cb422 L |
2081 | if (h->type == STT_GNU_IFUNC) |
2082 | { | |
2083 | if (h->plt.refcount > 0) | |
2084 | h->plt.refcount -= 1; | |
2085 | } | |
26e41594 AM |
2086 | } |
2087 | else if (local_got_refcounts != NULL) | |
2088 | { | |
2089 | if (local_got_refcounts[r_symndx] > 0) | |
2090 | local_got_refcounts[r_symndx] -= 1; | |
2091 | } | |
2092 | break; | |
c434dee6 | 2093 | |
26e41594 AM |
2094 | case R_X86_64_8: |
2095 | case R_X86_64_16: | |
2096 | case R_X86_64_32: | |
2097 | case R_X86_64_64: | |
2098 | case R_X86_64_32S: | |
2099 | case R_X86_64_PC8: | |
2100 | case R_X86_64_PC16: | |
2101 | case R_X86_64_PC32: | |
d6ab8113 | 2102 | case R_X86_64_PC64: |
3db2e7dd L |
2103 | if (info->shared |
2104 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
26e41594 AM |
2105 | break; |
2106 | /* Fall thru */ | |
c434dee6 | 2107 | |
26e41594 | 2108 | case R_X86_64_PLT32: |
7b81dfbb | 2109 | case R_X86_64_PLTOFF64: |
26e41594 AM |
2110 | if (h != NULL) |
2111 | { | |
2112 | if (h->plt.refcount > 0) | |
2113 | h->plt.refcount -= 1; | |
2114 | } | |
2115 | break; | |
70256ad8 | 2116 | |
26e41594 AM |
2117 | default: |
2118 | break; | |
2119 | } | |
2120 | } | |
70256ad8 | 2121 | |
b34976b6 | 2122 | return TRUE; |
70256ad8 AJ |
2123 | } |
2124 | ||
2125 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
2126 | regular object. The current definition is in some section of the | |
2127 | dynamic object, but we're not including those sections. We have to | |
2128 | change the definition to something the rest of the link can | |
407443a3 | 2129 | understand. */ |
70256ad8 | 2130 | |
b34976b6 | 2131 | static bfd_boolean |
351f65ca L |
2132 | elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
2133 | struct elf_link_hash_entry *h) | |
70256ad8 | 2134 | { |
351f65ca | 2135 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 | 2136 | asection *s; |
70256ad8 | 2137 | |
cbe950e9 L |
2138 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2139 | if (h->type == STT_GNU_IFUNC) | |
2140 | { | |
2141 | if (h->plt.refcount <= 0) | |
2142 | { | |
2143 | h->plt.offset = (bfd_vma) -1; | |
2144 | h->needs_plt = 0; | |
2145 | } | |
2146 | return TRUE; | |
2147 | } | |
2148 | ||
70256ad8 AJ |
2149 | /* If this is a function, put it in the procedure linkage table. We |
2150 | will fill in the contents of the procedure linkage table later, | |
2151 | when we know the address of the .got section. */ | |
2152 | if (h->type == STT_FUNC | |
f5385ebf | 2153 | || h->needs_plt) |
70256ad8 | 2154 | { |
c434dee6 | 2155 | if (h->plt.refcount <= 0 |
27482721 AJ |
2156 | || SYMBOL_CALLS_LOCAL (info, h) |
2157 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2158 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 2159 | { |
70256ad8 AJ |
2160 | /* This case can occur if we saw a PLT32 reloc in an input |
2161 | file, but the symbol was never referred to by a dynamic | |
2162 | object, or if all references were garbage collected. In | |
2163 | such a case, we don't actually need to build a procedure | |
2164 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 2165 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2166 | h->needs_plt = 0; |
70256ad8 AJ |
2167 | } |
2168 | ||
b34976b6 | 2169 | return TRUE; |
70256ad8 | 2170 | } |
bbd7ec4a | 2171 | else |
c434dee6 AJ |
2172 | /* It's possible that we incorrectly decided a .plt reloc was |
2173 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
2174 | check_relocs. We can't decide accurately between function and | |
2175 | non-function syms in check-relocs; Objects loaded later in | |
2176 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2177 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
2178 | |
2179 | /* If this is a weak symbol, and there is a real definition, the | |
2180 | processor independent code will have arranged for us to see the | |
407443a3 | 2181 | real definition first, and we can just use the same value. */ |
f6e332e6 | 2182 | if (h->u.weakdef != NULL) |
70256ad8 | 2183 | { |
f6e332e6 AM |
2184 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2185 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2186 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2187 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 2188 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 2189 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 2190 | return TRUE; |
70256ad8 AJ |
2191 | } |
2192 | ||
2193 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 2194 | is not a function. */ |
70256ad8 AJ |
2195 | |
2196 | /* If we are creating a shared library, we must presume that the | |
2197 | only references to the symbol are via the global offset table. | |
2198 | For such cases we need not do anything here; the relocations will | |
407443a3 | 2199 | be handled correctly by relocate_section. */ |
70256ad8 | 2200 | if (info->shared) |
b34976b6 | 2201 | return TRUE; |
70256ad8 AJ |
2202 | |
2203 | /* If there are no references to this symbol that do not use the | |
2204 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 2205 | if (!h->non_got_ref) |
b34976b6 | 2206 | return TRUE; |
70256ad8 | 2207 | |
c434dee6 AJ |
2208 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2209 | if (info->nocopyreloc) | |
2210 | { | |
f5385ebf | 2211 | h->non_got_ref = 0; |
b34976b6 | 2212 | return TRUE; |
c434dee6 AJ |
2213 | } |
2214 | ||
d40d037c | 2215 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 2216 | { |
351f65ca | 2217 | struct elf_x86_64_link_hash_entry * eh; |
e03a8ed8 | 2218 | struct elf_dyn_relocs *p; |
c434dee6 | 2219 | |
351f65ca | 2220 | eh = (struct elf_x86_64_link_hash_entry *) h; |
d40d037c AJ |
2221 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2222 | { | |
2223 | s = p->sec->output_section; | |
2224 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2225 | break; | |
2226 | } | |
2227 | ||
2228 | /* If we didn't find any dynamic relocs in read-only sections, then | |
2229 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
2230 | if (p == NULL) | |
2231 | { | |
f5385ebf | 2232 | h->non_got_ref = 0; |
d40d037c AJ |
2233 | return TRUE; |
2234 | } | |
c434dee6 AJ |
2235 | } |
2236 | ||
70256ad8 | 2237 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 2238 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
2239 | an entry for this symbol in the .dynsym section. The dynamic |
2240 | object will contain position independent code, so all references | |
2241 | from the dynamic object to this symbol will go through the global | |
2242 | offset table. The dynamic linker will use the .dynsym entry to | |
2243 | determine the address it must put in the global offset table, so | |
2244 | both the dynamic object and the regular object will refer to the | |
2245 | same memory location for the variable. */ | |
2246 | ||
351f65ca | 2247 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2248 | if (htab == NULL) |
2249 | return FALSE; | |
70256ad8 AJ |
2250 | |
2251 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
2252 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 2253 | runtime process image. */ |
1d7e9d18 | 2254 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
70256ad8 | 2255 | { |
351f65ca L |
2256 | const struct elf_backend_data *bed; |
2257 | bed = get_elf_backend_data (info->output_bfd); | |
2258 | htab->srelbss->size += bed->s->sizeof_rela; | |
f5385ebf | 2259 | h->needs_copy = 1; |
70256ad8 AJ |
2260 | } |
2261 | ||
c434dee6 | 2262 | s = htab->sdynbss; |
70256ad8 | 2263 | |
027297b7 | 2264 | return _bfd_elf_adjust_dynamic_copy (h, s); |
70256ad8 AJ |
2265 | } |
2266 | ||
c434dee6 AJ |
2267 | /* Allocate space in .plt, .got and associated reloc sections for |
2268 | dynamic relocs. */ | |
2269 | ||
b34976b6 | 2270 | static bfd_boolean |
351f65ca | 2271 | elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
2272 | { |
2273 | struct bfd_link_info *info; | |
351f65ca L |
2274 | struct elf_x86_64_link_hash_table *htab; |
2275 | struct elf_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 2276 | struct elf_dyn_relocs *p; |
351f65ca | 2277 | const struct elf_backend_data *bed; |
eed180f8 | 2278 | unsigned int plt_entry_size; |
c434dee6 | 2279 | |
e92d460e | 2280 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2281 | return TRUE; |
c434dee6 | 2282 | |
351f65ca | 2283 | eh = (struct elf_x86_64_link_hash_entry *) h; |
e92d460e | 2284 | |
c434dee6 | 2285 | info = (struct bfd_link_info *) inf; |
351f65ca | 2286 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2287 | if (htab == NULL) |
2288 | return FALSE; | |
351f65ca | 2289 | bed = get_elf_backend_data (info->output_bfd); |
eed180f8 | 2290 | plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
c434dee6 | 2291 | |
cbe950e9 L |
2292 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2293 | here if it is defined and referenced in a non-shared object. */ | |
2294 | if (h->type == STT_GNU_IFUNC | |
2295 | && h->def_regular) | |
e03a8ed8 L |
2296 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, |
2297 | &eh->dyn_relocs, | |
eed180f8 | 2298 | plt_entry_size, |
e03a8ed8 | 2299 | GOT_ENTRY_SIZE); |
cbe950e9 L |
2300 | else if (htab->elf.dynamic_sections_created |
2301 | && h->plt.refcount > 0) | |
c434dee6 AJ |
2302 | { |
2303 | /* Make sure this symbol is output as a dynamic symbol. | |
2304 | Undefined weak syms won't yet be marked as dynamic. */ | |
2305 | if (h->dynindx == -1 | |
f5385ebf | 2306 | && !h->forced_local) |
c434dee6 | 2307 | { |
c152c796 | 2308 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2309 | return FALSE; |
c434dee6 AJ |
2310 | } |
2311 | ||
27482721 AJ |
2312 | if (info->shared |
2313 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
c434dee6 | 2314 | { |
6de2ae4a | 2315 | asection *s = htab->elf.splt; |
c434dee6 AJ |
2316 | |
2317 | /* If this is the first .plt entry, make room for the special | |
2318 | first entry. */ | |
eea6121a | 2319 | if (s->size == 0) |
eed180f8 | 2320 | s->size += plt_entry_size; |
c434dee6 | 2321 | |
eea6121a | 2322 | h->plt.offset = s->size; |
c434dee6 AJ |
2323 | |
2324 | /* If this symbol is not defined in a regular file, and we are | |
2325 | not generating a shared library, then set the symbol to this | |
2326 | location in the .plt. This is required to make function | |
2327 | pointers compare as equal between the normal executable and | |
2328 | the shared library. */ | |
2329 | if (! info->shared | |
f5385ebf | 2330 | && !h->def_regular) |
c434dee6 AJ |
2331 | { |
2332 | h->root.u.def.section = s; | |
2333 | h->root.u.def.value = h->plt.offset; | |
2334 | } | |
2335 | ||
2336 | /* Make room for this entry. */ | |
eed180f8 | 2337 | s->size += plt_entry_size; |
c434dee6 AJ |
2338 | |
2339 | /* We also need to make an entry in the .got.plt section, which | |
2340 | will be placed in the .got section by the linker script. */ | |
6de2ae4a | 2341 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; |
c434dee6 AJ |
2342 | |
2343 | /* We also need to make an entry in the .rela.plt section. */ | |
351f65ca | 2344 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
6de2ae4a | 2345 | htab->elf.srelplt->reloc_count++; |
c434dee6 AJ |
2346 | } |
2347 | else | |
2348 | { | |
2349 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 2350 | h->needs_plt = 0; |
c434dee6 AJ |
2351 | } |
2352 | } | |
2353 | else | |
2354 | { | |
2355 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 2356 | h->needs_plt = 0; |
c434dee6 AJ |
2357 | } |
2358 | ||
67a4f2b7 AO |
2359 | eh->tlsdesc_got = (bfd_vma) -1; |
2360 | ||
bffbf940 JJ |
2361 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
2362 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
2363 | if (h->got.refcount > 0 | |
1d85728f | 2364 | && info->executable |
bffbf940 | 2365 | && h->dynindx == -1 |
351f65ca | 2366 | && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) |
d8045f23 NC |
2367 | { |
2368 | h->got.offset = (bfd_vma) -1; | |
2369 | } | |
bffbf940 | 2370 | else if (h->got.refcount > 0) |
c434dee6 AJ |
2371 | { |
2372 | asection *s; | |
b34976b6 | 2373 | bfd_boolean dyn; |
351f65ca | 2374 | int tls_type = elf_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
2375 | |
2376 | /* Make sure this symbol is output as a dynamic symbol. | |
2377 | Undefined weak syms won't yet be marked as dynamic. */ | |
2378 | if (h->dynindx == -1 | |
f5385ebf | 2379 | && !h->forced_local) |
c434dee6 | 2380 | { |
c152c796 | 2381 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2382 | return FALSE; |
c434dee6 AJ |
2383 | } |
2384 | ||
67a4f2b7 AO |
2385 | if (GOT_TLS_GDESC_P (tls_type)) |
2386 | { | |
6de2ae4a | 2387 | eh->tlsdesc_got = htab->elf.sgotplt->size |
351f65ca | 2388 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2389 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2390 | h->got.offset = (bfd_vma) -2; |
2391 | } | |
2392 | if (! GOT_TLS_GDESC_P (tls_type) | |
2393 | || GOT_TLS_GD_P (tls_type)) | |
2394 | { | |
6de2ae4a | 2395 | s = htab->elf.sgot; |
67a4f2b7 AO |
2396 | h->got.offset = s->size; |
2397 | s->size += GOT_ENTRY_SIZE; | |
2398 | if (GOT_TLS_GD_P (tls_type)) | |
2399 | s->size += GOT_ENTRY_SIZE; | |
2400 | } | |
c434dee6 | 2401 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 JJ |
2402 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
2403 | and two if global. | |
2404 | R_X86_64_GOTTPOFF needs one dynamic relocation. */ | |
67a4f2b7 | 2405 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 2406 | || tls_type == GOT_TLS_IE) |
351f65ca | 2407 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 | 2408 | else if (GOT_TLS_GD_P (tls_type)) |
351f65ca | 2409 | htab->elf.srelgot->size += 2 * bed->s->sizeof_rela; |
67a4f2b7 AO |
2410 | else if (! GOT_TLS_GDESC_P (tls_type) |
2411 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2412 | || h->root.type != bfd_link_hash_undefweak) | |
27482721 AJ |
2413 | && (info->shared |
2414 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
351f65ca | 2415 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2416 | if (GOT_TLS_GDESC_P (tls_type)) |
2417 | { | |
351f65ca | 2418 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2419 | htab->tlsdesc_plt = (bfd_vma) -1; |
2420 | } | |
c434dee6 AJ |
2421 | } |
2422 | else | |
2423 | h->got.offset = (bfd_vma) -1; | |
2424 | ||
c434dee6 | 2425 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2426 | return TRUE; |
c434dee6 AJ |
2427 | |
2428 | /* In the shared -Bsymbolic case, discard space allocated for | |
2429 | dynamic pc-relative relocs against symbols which turn out to be | |
2430 | defined in regular objects. For the normal shared case, discard | |
2431 | space for pc-relative relocs that have become local due to symbol | |
2432 | visibility changes. */ | |
2433 | ||
2434 | if (info->shared) | |
2435 | { | |
27482721 AJ |
2436 | /* Relocs that use pc_count are those that appear on a call |
2437 | insn, or certain REL relocs that can generated via assembly. | |
2438 | We want calls to protected symbols to resolve directly to the | |
2439 | function rather than going via the plt. If people want | |
2440 | function pointer comparisons to work as expected then they | |
2441 | should avoid writing weird assembly. */ | |
2442 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 2443 | { |
e03a8ed8 | 2444 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
2445 | |
2446 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2447 | { | |
2448 | p->count -= p->pc_count; | |
2449 | p->pc_count = 0; | |
2450 | if (p->count == 0) | |
2451 | *pp = p->next; | |
2452 | else | |
2453 | pp = &p->next; | |
2454 | } | |
2455 | } | |
4e795f50 AM |
2456 | |
2457 | /* Also discard relocs on undefined weak syms with non-default | |
2458 | visibility. */ | |
22d606e9 | 2459 | if (eh->dyn_relocs != NULL |
4e795f50 | 2460 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
2461 | { |
2462 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2463 | eh->dyn_relocs = NULL; | |
2464 | ||
2465 | /* Make sure undefined weak symbols are output as a dynamic | |
2466 | symbol in PIEs. */ | |
2467 | else if (h->dynindx == -1 | |
d8045f23 NC |
2468 | && ! h->forced_local |
2469 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2470 | return FALSE; | |
22d606e9 | 2471 | } |
cbe950e9 | 2472 | |
d8045f23 | 2473 | } |
d40d037c | 2474 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
2475 | { |
2476 | /* For the non-shared case, discard space for relocs against | |
2477 | symbols which turn out to need copy relocs or are not | |
2478 | dynamic. */ | |
2479 | ||
f5385ebf AM |
2480 | if (!h->non_got_ref |
2481 | && ((h->def_dynamic | |
2482 | && !h->def_regular) | |
c434dee6 AJ |
2483 | || (htab->elf.dynamic_sections_created |
2484 | && (h->root.type == bfd_link_hash_undefweak | |
2485 | || h->root.type == bfd_link_hash_undefined)))) | |
2486 | { | |
2487 | /* Make sure this symbol is output as a dynamic symbol. | |
2488 | Undefined weak syms won't yet be marked as dynamic. */ | |
2489 | if (h->dynindx == -1 | |
d8045f23 NC |
2490 | && ! h->forced_local |
2491 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2492 | return FALSE; | |
c434dee6 AJ |
2493 | |
2494 | /* If that succeeded, we know we'll be keeping all the | |
2495 | relocs. */ | |
2496 | if (h->dynindx != -1) | |
2497 | goto keep; | |
2498 | } | |
2499 | ||
2500 | eh->dyn_relocs = NULL; | |
2501 | ||
2502 | keep: ; | |
2503 | } | |
2504 | ||
2505 | /* Finally, allocate space. */ | |
2506 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2507 | { | |
e7c33416 NC |
2508 | asection * sreloc; |
2509 | ||
cbe950e9 | 2510 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2511 | |
2512 | BFD_ASSERT (sreloc != NULL); | |
2513 | ||
351f65ca | 2514 | sreloc->size += p->count * bed->s->sizeof_rela; |
c434dee6 AJ |
2515 | } |
2516 | ||
b34976b6 | 2517 | return TRUE; |
c434dee6 AJ |
2518 | } |
2519 | ||
c25bc9fc L |
2520 | /* Allocate space in .plt, .got and associated reloc sections for |
2521 | local dynamic relocs. */ | |
2522 | ||
2523 | static bfd_boolean | |
351f65ca | 2524 | elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf) |
c25bc9fc L |
2525 | { |
2526 | struct elf_link_hash_entry *h | |
2527 | = (struct elf_link_hash_entry *) *slot; | |
2528 | ||
2529 | if (h->type != STT_GNU_IFUNC | |
2530 | || !h->def_regular | |
2531 | || !h->ref_regular | |
2532 | || !h->forced_local | |
2533 | || h->root.type != bfd_link_hash_defined) | |
2534 | abort (); | |
2535 | ||
351f65ca | 2536 | return elf_x86_64_allocate_dynrelocs (h, inf); |
c25bc9fc L |
2537 | } |
2538 | ||
c434dee6 AJ |
2539 | /* Find any dynamic relocs that apply to read-only sections. */ |
2540 | ||
b34976b6 | 2541 | static bfd_boolean |
351f65ca L |
2542 | elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h, |
2543 | void * inf) | |
c434dee6 | 2544 | { |
351f65ca | 2545 | struct elf_x86_64_link_hash_entry *eh; |
e03a8ed8 | 2546 | struct elf_dyn_relocs *p; |
c434dee6 | 2547 | |
aa715242 L |
2548 | /* Skip local IFUNC symbols. */ |
2549 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
2550 | return TRUE; | |
2551 | ||
351f65ca | 2552 | eh = (struct elf_x86_64_link_hash_entry *) h; |
c434dee6 AJ |
2553 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2554 | { | |
2555 | asection *s = p->sec->output_section; | |
2556 | ||
2557 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2558 | { | |
2559 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2560 | ||
2561 | info->flags |= DF_TEXTREL; | |
2562 | ||
b70321a2 L |
2563 | if (info->warn_shared_textrel && info->shared) |
2564 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"), | |
2565 | p->sec->owner, h->root.root.string, | |
2566 | p->sec); | |
2567 | ||
c434dee6 | 2568 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 2569 | return FALSE; |
c434dee6 AJ |
2570 | } |
2571 | } | |
b34976b6 | 2572 | return TRUE; |
c434dee6 AJ |
2573 | } |
2574 | ||
daa67607 L |
2575 | /* Convert |
2576 | mov foo@GOTPCREL(%rip), %reg | |
2577 | to | |
2578 | lea foo(%rip), %reg | |
2579 | with the local symbol, foo. */ | |
2580 | ||
2581 | static bfd_boolean | |
2582 | elf_x86_64_convert_mov_to_lea (bfd *abfd, asection *sec, | |
2583 | struct bfd_link_info *link_info) | |
2584 | { | |
2585 | Elf_Internal_Shdr *symtab_hdr; | |
2586 | Elf_Internal_Rela *internal_relocs; | |
2587 | Elf_Internal_Rela *irel, *irelend; | |
2588 | bfd_byte *contents; | |
2589 | struct elf_x86_64_link_hash_table *htab; | |
2590 | bfd_boolean changed_contents; | |
2591 | bfd_boolean changed_relocs; | |
2592 | bfd_signed_vma *local_got_refcounts; | |
2593 | ||
2594 | /* Don't even try to convert non-ELF outputs. */ | |
2595 | if (!is_elf_hash_table (link_info->hash)) | |
2596 | return FALSE; | |
2597 | ||
2598 | /* Nothing to do if there are no codes or no relocations. */ | |
2599 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) | |
2600 | || sec->reloc_count == 0) | |
2601 | return TRUE; | |
2602 | ||
2603 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2604 | ||
2605 | /* Load the relocations for this section. */ | |
2606 | internal_relocs = (_bfd_elf_link_read_relocs | |
2607 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
2608 | link_info->keep_memory)); | |
2609 | if (internal_relocs == NULL) | |
2610 | return FALSE; | |
2611 | ||
2612 | htab = elf_x86_64_hash_table (link_info); | |
2613 | changed_contents = FALSE; | |
2614 | changed_relocs = FALSE; | |
2615 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2616 | ||
2617 | /* Get the section contents. */ | |
2618 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2619 | contents = elf_section_data (sec)->this_hdr.contents; | |
2620 | else | |
2621 | { | |
2622 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2623 | goto error_return; | |
2624 | } | |
2625 | ||
2626 | irelend = internal_relocs + sec->reloc_count; | |
2627 | for (irel = internal_relocs; irel < irelend; irel++) | |
2628 | { | |
2629 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
2630 | unsigned int r_symndx = htab->r_sym (irel->r_info); | |
2631 | unsigned int indx; | |
2632 | struct elf_link_hash_entry *h; | |
2633 | ||
2634 | if (r_type != R_X86_64_GOTPCREL) | |
2635 | continue; | |
2636 | ||
2637 | /* Get the symbol referred to by the reloc. */ | |
2638 | if (r_symndx < symtab_hdr->sh_info) | |
2639 | { | |
2640 | Elf_Internal_Sym *isym; | |
2641 | ||
2642 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2643 | abfd, r_symndx); | |
2644 | ||
2645 | /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */ | |
2646 | if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC | |
2647 | && bfd_get_8 (input_bfd, | |
2648 | contents + irel->r_offset - 2) == 0x8b) | |
2649 | { | |
2650 | bfd_put_8 (output_bfd, 0x8d, | |
2651 | contents + irel->r_offset - 2); | |
2652 | irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32); | |
2653 | if (local_got_refcounts != NULL | |
2654 | && local_got_refcounts[r_symndx] > 0) | |
2655 | local_got_refcounts[r_symndx] -= 1; | |
2656 | changed_contents = TRUE; | |
2657 | changed_relocs = TRUE; | |
2658 | } | |
2659 | continue; | |
2660 | } | |
2661 | ||
2662 | indx = r_symndx - symtab_hdr->sh_info; | |
2663 | h = elf_sym_hashes (abfd)[indx]; | |
2664 | BFD_ASSERT (h != NULL); | |
2665 | ||
2666 | while (h->root.type == bfd_link_hash_indirect | |
2667 | || h->root.type == bfd_link_hash_warning) | |
2668 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2669 | ||
3f65f599 L |
2670 | /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also |
2671 | avoid optimizing _DYNAMIC since ld.so may use its link-time | |
2672 | address. */ | |
daa67607 L |
2673 | if (h->def_regular |
2674 | && h->type != STT_GNU_IFUNC | |
9637f6ef | 2675 | && h != htab->elf.hdynamic |
daa67607 L |
2676 | && SYMBOL_REFERENCES_LOCAL (link_info, h) |
2677 | && bfd_get_8 (input_bfd, | |
2678 | contents + irel->r_offset - 2) == 0x8b) | |
2679 | { | |
2680 | bfd_put_8 (output_bfd, 0x8d, | |
2681 | contents + irel->r_offset - 2); | |
2682 | irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32); | |
2683 | if (h->got.refcount > 0) | |
2684 | h->got.refcount -= 1; | |
2685 | changed_contents = TRUE; | |
2686 | changed_relocs = TRUE; | |
2687 | } | |
2688 | } | |
2689 | ||
2690 | if (contents != NULL | |
2691 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2692 | { | |
2693 | if (!changed_contents && !link_info->keep_memory) | |
2694 | free (contents); | |
2695 | else | |
2696 | { | |
2697 | /* Cache the section contents for elf_link_input_bfd. */ | |
2698 | elf_section_data (sec)->this_hdr.contents = contents; | |
2699 | } | |
2700 | } | |
2701 | ||
2702 | if (elf_section_data (sec)->relocs != internal_relocs) | |
2703 | { | |
2704 | if (!changed_relocs) | |
2705 | free (internal_relocs); | |
2706 | else | |
2707 | elf_section_data (sec)->relocs = internal_relocs; | |
2708 | } | |
2709 | ||
2710 | return TRUE; | |
2711 | ||
2712 | error_return: | |
2713 | if (contents != NULL | |
2714 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2715 | free (contents); | |
2716 | if (internal_relocs != NULL | |
2717 | && elf_section_data (sec)->relocs != internal_relocs) | |
2718 | free (internal_relocs); | |
2719 | return FALSE; | |
2720 | } | |
2721 | ||
70256ad8 AJ |
2722 | /* Set the sizes of the dynamic sections. */ |
2723 | ||
b34976b6 | 2724 | static bfd_boolean |
351f65ca L |
2725 | elf_x86_64_size_dynamic_sections (bfd *output_bfd, |
2726 | struct bfd_link_info *info) | |
70256ad8 | 2727 | { |
351f65ca | 2728 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2729 | bfd *dynobj; |
2730 | asection *s; | |
b34976b6 | 2731 | bfd_boolean relocs; |
c434dee6 | 2732 | bfd *ibfd; |
351f65ca | 2733 | const struct elf_backend_data *bed; |
70256ad8 | 2734 | |
351f65ca | 2735 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2736 | if (htab == NULL) |
2737 | return FALSE; | |
351f65ca | 2738 | bed = get_elf_backend_data (output_bfd); |
4dfe6ac6 | 2739 | |
c434dee6 AJ |
2740 | dynobj = htab->elf.dynobj; |
2741 | if (dynobj == NULL) | |
2742 | abort (); | |
70256ad8 | 2743 | |
c434dee6 | 2744 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
2745 | { |
2746 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 2747 | if (info->executable) |
70256ad8 | 2748 | { |
3d4d4302 | 2749 | s = bfd_get_linker_section (dynobj, ".interp"); |
c434dee6 AJ |
2750 | if (s == NULL) |
2751 | abort (); | |
351f65ca L |
2752 | s->size = htab->dynamic_interpreter_size; |
2753 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
70256ad8 AJ |
2754 | } |
2755 | } | |
70256ad8 | 2756 | |
c434dee6 AJ |
2757 | /* Set up .got offsets for local syms, and space for local dynamic |
2758 | relocs. */ | |
2759 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
70256ad8 | 2760 | { |
c434dee6 AJ |
2761 | bfd_signed_vma *local_got; |
2762 | bfd_signed_vma *end_local_got; | |
bffbf940 | 2763 | char *local_tls_type; |
67a4f2b7 | 2764 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
2765 | bfd_size_type locsymcount; |
2766 | Elf_Internal_Shdr *symtab_hdr; | |
2767 | asection *srel; | |
70256ad8 | 2768 | |
0ffa91dd | 2769 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
2770 | continue; |
2771 | ||
c434dee6 | 2772 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 2773 | { |
e03a8ed8 | 2774 | struct elf_dyn_relocs *p; |
c434dee6 | 2775 | |
daa67607 L |
2776 | if (!elf_x86_64_convert_mov_to_lea (ibfd, s, info)) |
2777 | return FALSE; | |
2778 | ||
e03a8ed8 | 2779 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 2780 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
2781 | p != NULL; |
2782 | p = p->next) | |
70256ad8 | 2783 | { |
c434dee6 AJ |
2784 | if (!bfd_is_abs_section (p->sec) |
2785 | && bfd_is_abs_section (p->sec->output_section)) | |
2786 | { | |
2787 | /* Input section has been discarded, either because | |
2788 | it is a copy of a linkonce section or due to | |
2789 | linker script /DISCARD/, so we'll be discarding | |
2790 | the relocs too. */ | |
2791 | } | |
2792 | else if (p->count != 0) | |
2793 | { | |
2794 | srel = elf_section_data (p->sec)->sreloc; | |
351f65ca | 2795 | srel->size += p->count * bed->s->sizeof_rela; |
4b819e1f L |
2796 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
2797 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
2798 | { |
2799 | info->flags |= DF_TEXTREL; | |
2800 | if (info->warn_shared_textrel && info->shared) | |
2801 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"), | |
2802 | p->sec->owner, p->sec); | |
b70321a2 | 2803 | } |
c434dee6 | 2804 | } |
70256ad8 AJ |
2805 | } |
2806 | } | |
c434dee6 AJ |
2807 | |
2808 | local_got = elf_local_got_refcounts (ibfd); | |
2809 | if (!local_got) | |
2810 | continue; | |
2811 | ||
0ffa91dd | 2812 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
2813 | locsymcount = symtab_hdr->sh_info; |
2814 | end_local_got = local_got + locsymcount; | |
351f65ca L |
2815 | local_tls_type = elf_x86_64_local_got_tls_type (ibfd); |
2816 | local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd); | |
6de2ae4a L |
2817 | s = htab->elf.sgot; |
2818 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
2819 | for (; local_got < end_local_got; |
2820 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 2821 | { |
67a4f2b7 | 2822 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 2823 | if (*local_got > 0) |
70256ad8 | 2824 | { |
67a4f2b7 AO |
2825 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
2826 | { | |
6de2ae4a | 2827 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
351f65ca | 2828 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2829 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2830 | *local_got = (bfd_vma) -2; |
2831 | } | |
2832 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2833 | || GOT_TLS_GD_P (*local_tls_type)) | |
2834 | { | |
2835 | *local_got = s->size; | |
2836 | s->size += GOT_ENTRY_SIZE; | |
2837 | if (GOT_TLS_GD_P (*local_tls_type)) | |
2838 | s->size += GOT_ENTRY_SIZE; | |
2839 | } | |
bffbf940 | 2840 | if (info->shared |
67a4f2b7 | 2841 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 2842 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
2843 | { |
2844 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
2845 | { | |
6de2ae4a | 2846 | htab->elf.srelplt->size |
351f65ca | 2847 | += bed->s->sizeof_rela; |
67a4f2b7 AO |
2848 | htab->tlsdesc_plt = (bfd_vma) -1; |
2849 | } | |
2850 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2851 | || GOT_TLS_GD_P (*local_tls_type)) | |
351f65ca | 2852 | srel->size += bed->s->sizeof_rela; |
67a4f2b7 | 2853 | } |
70256ad8 AJ |
2854 | } |
2855 | else | |
c434dee6 AJ |
2856 | *local_got = (bfd_vma) -1; |
2857 | } | |
2858 | } | |
70256ad8 | 2859 | |
bffbf940 JJ |
2860 | if (htab->tls_ld_got.refcount > 0) |
2861 | { | |
2862 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
2863 | relocs. */ | |
6de2ae4a L |
2864 | htab->tls_ld_got.offset = htab->elf.sgot->size; |
2865 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; | |
351f65ca | 2866 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
bffbf940 JJ |
2867 | } |
2868 | else | |
2869 | htab->tls_ld_got.offset = -1; | |
2870 | ||
c434dee6 AJ |
2871 | /* Allocate global sym .plt and .got entries, and space for global |
2872 | sym dynamic relocs. */ | |
351f65ca | 2873 | elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs, |
eb4ff4d6 | 2874 | info); |
c434dee6 | 2875 | |
c25bc9fc L |
2876 | /* Allocate .plt and .got entries, and space for local symbols. */ |
2877 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 2878 | elf_x86_64_allocate_local_dynrelocs, |
c25bc9fc L |
2879 | info); |
2880 | ||
67a4f2b7 AO |
2881 | /* For every jump slot reserved in the sgotplt, reloc_count is |
2882 | incremented. However, when we reserve space for TLS descriptors, | |
2883 | it's not incremented, so in order to compute the space reserved | |
2884 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 L |
2885 | slot size. |
2886 | ||
2887 | PR ld/13302: We start next_irelative_index at the end of .rela.plt | |
2888 | so that R_X86_64_IRELATIVE entries come last. */ | |
6de2ae4a | 2889 | if (htab->elf.srelplt) |
e1f98742 L |
2890 | { |
2891 | htab->sgotplt_jump_table_size | |
2892 | = elf_x86_64_compute_jump_table_size (htab); | |
2893 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
2894 | } | |
2895 | else if (htab->elf.irelplt) | |
2896 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
67a4f2b7 AO |
2897 | |
2898 | if (htab->tlsdesc_plt) | |
2899 | { | |
2900 | /* If we're not using lazy TLS relocations, don't generate the | |
2901 | PLT and GOT entries they require. */ | |
2902 | if ((info->flags & DF_BIND_NOW)) | |
2903 | htab->tlsdesc_plt = 0; | |
2904 | else | |
2905 | { | |
6de2ae4a L |
2906 | htab->tlsdesc_got = htab->elf.sgot->size; |
2907 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
2908 | /* Reserve room for the initial entry. |
2909 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a | 2910 | if (htab->elf.splt->size == 0) |
eed180f8 | 2911 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
6de2ae4a | 2912 | htab->tlsdesc_plt = htab->elf.splt->size; |
eed180f8 | 2913 | htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd); |
67a4f2b7 AO |
2914 | } |
2915 | } | |
2916 | ||
a7b16ceb L |
2917 | if (htab->elf.sgotplt) |
2918 | { | |
e28df02b L |
2919 | struct elf_link_hash_entry *got; |
2920 | got = elf_link_hash_lookup (elf_hash_table (info), | |
2921 | "_GLOBAL_OFFSET_TABLE_", | |
2922 | FALSE, FALSE, FALSE); | |
2923 | ||
a7b16ceb | 2924 | /* Don't allocate .got.plt section if there are no GOT nor PLT |
eed180f8 | 2925 | entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ |
e28df02b L |
2926 | if ((got == NULL |
2927 | || !got->ref_regular_nonweak) | |
2928 | && (htab->elf.sgotplt->size | |
2929 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
2930 | && (htab->elf.splt == NULL |
2931 | || htab->elf.splt->size == 0) | |
2932 | && (htab->elf.sgot == NULL | |
2933 | || htab->elf.sgot->size == 0) | |
2934 | && (htab->elf.iplt == NULL | |
2935 | || htab->elf.iplt->size == 0) | |
2936 | && (htab->elf.igotplt == NULL | |
2937 | || htab->elf.igotplt->size == 0)) | |
2938 | htab->elf.sgotplt->size = 0; | |
2939 | } | |
2940 | ||
9a2a56cc AM |
2941 | if (htab->plt_eh_frame != NULL |
2942 | && htab->elf.splt != NULL | |
2943 | && htab->elf.splt->size != 0 | |
2944 | && !bfd_is_abs_section (htab->elf.splt->output_section) | |
2945 | && _bfd_elf_eh_frame_present (info)) | |
2946 | { | |
2947 | const struct elf_x86_64_backend_data *arch_data | |
2948 | = (const struct elf_x86_64_backend_data *) bed->arch_data; | |
2949 | htab->plt_eh_frame->size = arch_data->eh_frame_plt_size; | |
2950 | } | |
2951 | ||
c434dee6 AJ |
2952 | /* We now have determined the sizes of the various dynamic sections. |
2953 | Allocate memory for them. */ | |
b34976b6 | 2954 | relocs = FALSE; |
c434dee6 AJ |
2955 | for (s = dynobj->sections; s != NULL; s = s->next) |
2956 | { | |
2957 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2958 | continue; | |
2959 | ||
6de2ae4a L |
2960 | if (s == htab->elf.splt |
2961 | || s == htab->elf.sgot | |
2962 | || s == htab->elf.sgotplt | |
2963 | || s == htab->elf.iplt | |
2964 | || s == htab->elf.igotplt | |
9a2a56cc | 2965 | || s == htab->plt_eh_frame |
75ff4589 | 2966 | || s == htab->sdynbss) |
c434dee6 AJ |
2967 | { |
2968 | /* Strip this section if we don't need it; see the | |
2969 | comment below. */ | |
2970 | } | |
0112cd26 | 2971 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 2972 | { |
6de2ae4a | 2973 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 2974 | relocs = TRUE; |
c434dee6 AJ |
2975 | |
2976 | /* We use the reloc_count field as a counter if we need | |
2977 | to copy relocs into the output file. */ | |
6de2ae4a | 2978 | if (s != htab->elf.srelplt) |
67a4f2b7 | 2979 | s->reloc_count = 0; |
70256ad8 | 2980 | } |
c434dee6 | 2981 | else |
70256ad8 AJ |
2982 | { |
2983 | /* It's not one of our sections, so don't allocate space. */ | |
2984 | continue; | |
2985 | } | |
2986 | ||
eea6121a | 2987 | if (s->size == 0) |
70256ad8 | 2988 | { |
c434dee6 AJ |
2989 | /* If we don't need this section, strip it from the |
2990 | output file. This is mostly to handle .rela.bss and | |
2991 | .rela.plt. We must create both sections in | |
2992 | create_dynamic_sections, because they must be created | |
2993 | before the linker maps input sections to output | |
2994 | sections. The linker does that before | |
2995 | adjust_dynamic_symbol is called, and it is that | |
2996 | function which decides whether anything needs to go | |
2997 | into these sections. */ | |
2998 | ||
8423293d | 2999 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
3000 | continue; |
3001 | } | |
3002 | ||
c456f082 AM |
3003 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3004 | continue; | |
3005 | ||
70256ad8 AJ |
3006 | /* Allocate memory for the section contents. We use bfd_zalloc |
3007 | here in case unused entries are not reclaimed before the | |
3008 | section's contents are written out. This should not happen, | |
3009 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
3010 | of garbage. */ | |
eea6121a | 3011 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 3012 | if (s->contents == NULL) |
b34976b6 | 3013 | return FALSE; |
70256ad8 AJ |
3014 | } |
3015 | ||
e41b3a13 | 3016 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3017 | && htab->plt_eh_frame->contents != NULL) |
3018 | { | |
3019 | const struct elf_x86_64_backend_data *arch_data | |
3020 | = (const struct elf_x86_64_backend_data *) bed->arch_data; | |
3021 | ||
3022 | memcpy (htab->plt_eh_frame->contents, | |
3023 | arch_data->eh_frame_plt, htab->plt_eh_frame->size); | |
3024 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
3025 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
3026 | } | |
e41b3a13 | 3027 | |
c434dee6 | 3028 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
3029 | { |
3030 | /* Add some entries to the .dynamic section. We fill in the | |
351f65ca | 3031 | values later, in elf_x86_64_finish_dynamic_sections, but we |
70256ad8 | 3032 | must add the entries now so that we get the correct size for |
407443a3 | 3033 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 3034 | dynamic linker and used by the debugger. */ |
dc810e39 | 3035 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3036 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3037 | |
36af4a4e | 3038 | if (info->executable) |
70256ad8 | 3039 | { |
dc810e39 | 3040 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3041 | return FALSE; |
70256ad8 AJ |
3042 | } |
3043 | ||
6de2ae4a | 3044 | if (htab->elf.splt->size != 0) |
70256ad8 | 3045 | { |
dc810e39 AM |
3046 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
3047 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
3048 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
3049 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 3050 | return FALSE; |
67a4f2b7 AO |
3051 | |
3052 | if (htab->tlsdesc_plt | |
3053 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
3054 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
3055 | return FALSE; | |
70256ad8 AJ |
3056 | } |
3057 | ||
3058 | if (relocs) | |
3059 | { | |
dc810e39 AM |
3060 | if (!add_dynamic_entry (DT_RELA, 0) |
3061 | || !add_dynamic_entry (DT_RELASZ, 0) | |
351f65ca | 3062 | || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela)) |
b34976b6 | 3063 | return FALSE; |
70256ad8 | 3064 | |
c434dee6 AJ |
3065 | /* If any dynamic relocs apply to a read-only section, |
3066 | then we need a DT_TEXTREL entry. */ | |
3067 | if ((info->flags & DF_TEXTREL) == 0) | |
eed180f8 | 3068 | elf_link_hash_traverse (&htab->elf, |
351f65ca | 3069 | elf_x86_64_readonly_dynrelocs, |
eb4ff4d6 | 3070 | info); |
c434dee6 AJ |
3071 | |
3072 | if ((info->flags & DF_TEXTREL) != 0) | |
3073 | { | |
3074 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 3075 | return FALSE; |
c434dee6 | 3076 | } |
70256ad8 AJ |
3077 | } |
3078 | } | |
dc810e39 | 3079 | #undef add_dynamic_entry |
70256ad8 | 3080 | |
b34976b6 | 3081 | return TRUE; |
70256ad8 AJ |
3082 | } |
3083 | ||
67a4f2b7 | 3084 | static bfd_boolean |
351f65ca L |
3085 | elf_x86_64_always_size_sections (bfd *output_bfd, |
3086 | struct bfd_link_info *info) | |
67a4f2b7 AO |
3087 | { |
3088 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3089 | ||
3090 | if (tls_sec) | |
3091 | { | |
3092 | struct elf_link_hash_entry *tlsbase; | |
3093 | ||
3094 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3095 | "_TLS_MODULE_BASE_", | |
3096 | FALSE, FALSE, FALSE); | |
3097 | ||
3098 | if (tlsbase && tlsbase->type == STT_TLS) | |
3099 | { | |
351f65ca | 3100 | struct elf_x86_64_link_hash_table *htab; |
67a4f2b7 AO |
3101 | struct bfd_link_hash_entry *bh = NULL; |
3102 | const struct elf_backend_data *bed | |
3103 | = get_elf_backend_data (output_bfd); | |
3104 | ||
351f65ca | 3105 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3106 | if (htab == NULL) |
3107 | return FALSE; | |
3108 | ||
67a4f2b7 AO |
3109 | if (!(_bfd_generic_link_add_one_symbol |
3110 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3111 | tls_sec, 0, NULL, FALSE, | |
3112 | bed->collect, &bh))) | |
3113 | return FALSE; | |
9f03412a | 3114 | |
4dfe6ac6 | 3115 | htab->tls_module_base = bh; |
9f03412a | 3116 | |
67a4f2b7 AO |
3117 | tlsbase = (struct elf_link_hash_entry *)bh; |
3118 | tlsbase->def_regular = 1; | |
3119 | tlsbase->other = STV_HIDDEN; | |
3120 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
3121 | } | |
3122 | } | |
3123 | ||
3124 | return TRUE; | |
3125 | } | |
3126 | ||
9f03412a AO |
3127 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
3128 | executables. Rather than setting it to the beginning of the TLS | |
3129 | section, we have to set it to the end. This function may be called | |
3130 | multiple times, it is idempotent. */ | |
3131 | ||
3132 | static void | |
351f65ca | 3133 | elf_x86_64_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 3134 | { |
351f65ca | 3135 | struct elf_x86_64_link_hash_table *htab; |
9f03412a AO |
3136 | struct bfd_link_hash_entry *base; |
3137 | ||
3138 | if (!info->executable) | |
3139 | return; | |
3140 | ||
351f65ca | 3141 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3142 | if (htab == NULL) |
3143 | return; | |
9f03412a | 3144 | |
4dfe6ac6 NC |
3145 | base = htab->tls_module_base; |
3146 | if (base == NULL) | |
9f03412a AO |
3147 | return; |
3148 | ||
4dfe6ac6 | 3149 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
3150 | } |
3151 | ||
bffbf940 JJ |
3152 | /* Return the base VMA address which should be subtracted from real addresses |
3153 | when resolving @dtpoff relocation. | |
3154 | This is PT_TLS segment p_vaddr. */ | |
3155 | ||
3156 | static bfd_vma | |
351f65ca | 3157 | elf_x86_64_dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 3158 | { |
e1918d23 AM |
3159 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3160 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 3161 | return 0; |
e1918d23 | 3162 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
3163 | } |
3164 | ||
3165 | /* Return the relocation value for @tpoff relocation | |
3166 | if STT_TLS virtual address is ADDRESS. */ | |
3167 | ||
3168 | static bfd_vma | |
351f65ca | 3169 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 3170 | { |
e1918d23 | 3171 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3172 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3173 | bfd_vma static_tls_size; | |
bffbf940 JJ |
3174 | |
3175 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 3176 | if (htab->tls_sec == NULL) |
bffbf940 | 3177 | return 0; |
7dc98aea RO |
3178 | |
3179 | /* Consider special static TLS alignment requirements. */ | |
3180 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3181 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
3182 | } |
3183 | ||
90f487df L |
3184 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
3185 | branch? */ | |
3186 | ||
3187 | static bfd_boolean | |
3188 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
3189 | { | |
3190 | /* Opcode Instruction | |
3191 | 0xe8 call | |
3192 | 0xe9 jump | |
3193 | 0x0f 0x8x conditional jump */ | |
3194 | return ((offset > 0 | |
3195 | && (contents [offset - 1] == 0xe8 | |
3196 | || contents [offset - 1] == 0xe9)) | |
3197 | || (offset > 1 | |
3198 | && contents [offset - 2] == 0x0f | |
3199 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
3200 | } | |
3201 | ||
8d88c4ca NC |
3202 | /* Relocate an x86_64 ELF section. */ |
3203 | ||
b34976b6 | 3204 | static bfd_boolean |
351f65ca L |
3205 | elf_x86_64_relocate_section (bfd *output_bfd, |
3206 | struct bfd_link_info *info, | |
3207 | bfd *input_bfd, | |
3208 | asection *input_section, | |
3209 | bfd_byte *contents, | |
3210 | Elf_Internal_Rela *relocs, | |
3211 | Elf_Internal_Sym *local_syms, | |
3212 | asection **local_sections) | |
8d88c4ca | 3213 | { |
351f65ca | 3214 | struct elf_x86_64_link_hash_table *htab; |
8d88c4ca NC |
3215 | Elf_Internal_Shdr *symtab_hdr; |
3216 | struct elf_link_hash_entry **sym_hashes; | |
3217 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3218 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 3219 | Elf_Internal_Rela *rel; |
8d88c4ca | 3220 | Elf_Internal_Rela *relend; |
eed180f8 | 3221 | const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
8d88c4ca | 3222 | |
0ffa91dd NC |
3223 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
3224 | ||
351f65ca | 3225 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3226 | if (htab == NULL) |
3227 | return FALSE; | |
0ffa91dd | 3228 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
3229 | sym_hashes = elf_sym_hashes (input_bfd); |
3230 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
351f65ca | 3231 | local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 3232 | |
351f65ca | 3233 | elf_x86_64_set_tls_module_base (info); |
9f03412a | 3234 | |
c434dee6 | 3235 | rel = relocs; |
8d88c4ca | 3236 | relend = relocs + input_section->reloc_count; |
c434dee6 | 3237 | for (; rel < relend; rel++) |
8d88c4ca | 3238 | { |
bffbf940 | 3239 | unsigned int r_type; |
8d88c4ca NC |
3240 | reloc_howto_type *howto; |
3241 | unsigned long r_symndx; | |
3242 | struct elf_link_hash_entry *h; | |
3243 | Elf_Internal_Sym *sym; | |
3244 | asection *sec; | |
67a4f2b7 | 3245 | bfd_vma off, offplt; |
8d88c4ca | 3246 | bfd_vma relocation; |
b34976b6 | 3247 | bfd_boolean unresolved_reloc; |
8d88c4ca | 3248 | bfd_reloc_status_type r; |
bffbf940 | 3249 | int tls_type; |
cbe950e9 | 3250 | asection *base_got; |
8d88c4ca | 3251 | |
351f65ca | 3252 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
3253 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
3254 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
3255 | continue; | |
8d88c4ca | 3256 | |
bffbf940 | 3257 | if (r_type >= R_X86_64_max) |
8da6118f KH |
3258 | { |
3259 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3260 | return FALSE; |
8da6118f | 3261 | } |
8d88c4ca | 3262 | |
d7921315 | 3263 | if (r_type != (int) R_X86_64_32 |
eed180f8 | 3264 | || ABI_64_P (output_bfd)) |
d7921315 L |
3265 | howto = x86_64_elf_howto_table + r_type; |
3266 | else | |
3267 | howto = (x86_64_elf_howto_table | |
3268 | + ARRAY_SIZE (x86_64_elf_howto_table) - 1); | |
351f65ca | 3269 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
3270 | h = NULL; |
3271 | sym = NULL; | |
3272 | sec = NULL; | |
b34976b6 | 3273 | unresolved_reloc = FALSE; |
8d88c4ca | 3274 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
3275 | { |
3276 | sym = local_syms + r_symndx; | |
3277 | sec = local_sections[r_symndx]; | |
c434dee6 | 3278 | |
c25bc9fc L |
3279 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
3280 | &sec, rel); | |
3281 | ||
3282 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
1f85278f | 3283 | if (!info->relocatable |
351f65ca | 3284 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 3285 | { |
351f65ca L |
3286 | h = elf_x86_64_get_local_sym_hash (htab, input_bfd, |
3287 | rel, FALSE); | |
c25bc9fc L |
3288 | if (h == NULL) |
3289 | abort (); | |
3290 | ||
eed180f8 | 3291 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
3292 | h->root.u.def.value = sym->st_value; |
3293 | h->root.u.def.section = sec; | |
3294 | } | |
8da6118f | 3295 | } |
8d88c4ca | 3296 | else |
8da6118f | 3297 | { |
c9736ba0 | 3298 | bfd_boolean warned ATTRIBUTE_UNUSED; |
c434dee6 | 3299 | |
b2a8e766 AM |
3300 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3301 | r_symndx, symtab_hdr, sym_hashes, | |
3302 | h, sec, relocation, | |
3303 | unresolved_reloc, warned); | |
8da6118f | 3304 | } |
ab96bf03 | 3305 | |
dbaa2011 | 3306 | if (sec != NULL && discarded_section (sec)) |
0672748a | 3307 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 3308 | rel, 1, relend, howto, 0, contents); |
ab96bf03 AM |
3309 | |
3310 | if (info->relocatable) | |
3311 | continue; | |
3312 | ||
64d25c44 L |
3313 | if (rel->r_addend == 0 |
3314 | && r_type == R_X86_64_64 | |
3315 | && !ABI_64_P (output_bfd)) | |
3316 | { | |
3317 | /* For x32, treat R_X86_64_64 like R_X86_64_32 and zero-extend | |
3318 | it to 64bit if addend is zero. */ | |
3319 | r_type = R_X86_64_32; | |
3320 | memset (contents + rel->r_offset + 4, 0, 4); | |
3321 | } | |
3322 | ||
cbe950e9 L |
3323 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3324 | it here if it is defined in a non-shared object. */ | |
3325 | if (h != NULL | |
3326 | && h->type == STT_GNU_IFUNC | |
3327 | && h->def_regular) | |
3328 | { | |
3329 | asection *plt; | |
3330 | bfd_vma plt_index; | |
4c544807 | 3331 | const char *name; |
cbe950e9 L |
3332 | |
3333 | if ((input_section->flags & SEC_ALLOC) == 0 | |
3334 | || h->plt.offset == (bfd_vma) -1) | |
3335 | abort (); | |
3336 | ||
3337 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 3338 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
cbe950e9 L |
3339 | relocation = (plt->output_section->vma |
3340 | + plt->output_offset + h->plt.offset); | |
3341 | ||
3342 | switch (r_type) | |
3343 | { | |
3344 | default: | |
4c544807 L |
3345 | if (h->root.root.string) |
3346 | name = h->root.root.string; | |
3347 | else | |
3348 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
3349 | NULL); | |
cbe950e9 L |
3350 | (*_bfd_error_handler) |
3351 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
3352 | "symbol `%s' isn't handled by %s"), input_bfd, | |
3353 | x86_64_elf_howto_table[r_type].name, | |
4c544807 | 3354 | name, __FUNCTION__); |
cbe950e9 L |
3355 | bfd_set_error (bfd_error_bad_value); |
3356 | return FALSE; | |
3357 | ||
3358 | case R_X86_64_32S: | |
710ab287 | 3359 | if (info->shared) |
cbe950e9 | 3360 | abort (); |
710ab287 L |
3361 | goto do_relocation; |
3362 | ||
248775ba L |
3363 | case R_X86_64_32: |
3364 | if (ABI_64_P (output_bfd)) | |
3365 | goto do_relocation; | |
17672001 | 3366 | /* FALLTHROUGH */ |
eed180f8 | 3367 | case R_X86_64_64: |
710ab287 L |
3368 | if (rel->r_addend != 0) |
3369 | { | |
4c544807 L |
3370 | if (h->root.root.string) |
3371 | name = h->root.root.string; | |
3372 | else | |
3373 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3374 | sym, NULL); | |
710ab287 L |
3375 | (*_bfd_error_handler) |
3376 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
3377 | "symbol `%s' has non-zero addend: %d"), | |
3378 | input_bfd, x86_64_elf_howto_table[r_type].name, | |
4c544807 | 3379 | name, rel->r_addend); |
710ab287 L |
3380 | bfd_set_error (bfd_error_bad_value); |
3381 | return FALSE; | |
3382 | } | |
3383 | ||
3384 | /* Generate dynamic relcoation only when there is a | |
c293fa49 | 3385 | non-GOT reference in a shared object. */ |
710ab287 L |
3386 | if (info->shared && h->non_got_ref) |
3387 | { | |
3388 | Elf_Internal_Rela outrel; | |
710ab287 L |
3389 | asection *sreloc; |
3390 | ||
c25bc9fc L |
3391 | /* Need a dynamic relocation to get the real function |
3392 | address. */ | |
710ab287 L |
3393 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
3394 | info, | |
3395 | input_section, | |
3396 | rel->r_offset); | |
3397 | if (outrel.r_offset == (bfd_vma) -1 | |
3398 | || outrel.r_offset == (bfd_vma) -2) | |
3399 | abort (); | |
3400 | ||
3401 | outrel.r_offset += (input_section->output_section->vma | |
3402 | + input_section->output_offset); | |
3403 | ||
3404 | if (h->dynindx == -1 | |
44c4ea11 L |
3405 | || h->forced_local |
3406 | || info->executable) | |
710ab287 L |
3407 | { |
3408 | /* This symbol is resolved locally. */ | |
56b8aada L |
3409 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
3410 | outrel.r_addend = (h->root.u.def.value | |
3411 | + h->root.u.def.section->output_section->vma | |
3412 | + h->root.u.def.section->output_offset); | |
710ab287 L |
3413 | } |
3414 | else | |
3415 | { | |
351f65ca | 3416 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
3417 | outrel.r_addend = 0; |
3418 | } | |
3419 | ||
6de2ae4a | 3420 | sreloc = htab->elf.irelifunc; |
351f65ca | 3421 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
3422 | |
3423 | /* If this reloc is against an external symbol, we | |
3424 | do not want to fiddle with the addend. Otherwise, | |
3425 | we need to include the symbol value so that it | |
3426 | becomes an addend for the dynamic reloc. For an | |
3427 | internal symbol, we have updated addend. */ | |
56b8aada | 3428 | continue; |
710ab287 | 3429 | } |
17672001 | 3430 | /* FALLTHROUGH */ |
cbe950e9 L |
3431 | case R_X86_64_PC32: |
3432 | case R_X86_64_PC64: | |
3433 | case R_X86_64_PLT32: | |
3434 | goto do_relocation; | |
3435 | ||
3436 | case R_X86_64_GOTPCREL: | |
3437 | case R_X86_64_GOTPCREL64: | |
6de2ae4a | 3438 | base_got = htab->elf.sgot; |
cbe950e9 L |
3439 | off = h->got.offset; |
3440 | ||
7afd84dc | 3441 | if (base_got == NULL) |
cbe950e9 L |
3442 | abort (); |
3443 | ||
7afd84dc | 3444 | if (off == (bfd_vma) -1) |
cbe950e9 | 3445 | { |
7afd84dc L |
3446 | /* We can't use h->got.offset here to save state, or |
3447 | even just remember the offset, as finish_dynamic_symbol | |
3448 | would use that as offset into .got. */ | |
cbe950e9 | 3449 | |
6de2ae4a | 3450 | if (htab->elf.splt != NULL) |
7afd84dc | 3451 | { |
eed180f8 | 3452 | plt_index = h->plt.offset / plt_entry_size - 1; |
7afd84dc | 3453 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 3454 | base_got = htab->elf.sgotplt; |
7afd84dc | 3455 | } |
cbe950e9 L |
3456 | else |
3457 | { | |
eed180f8 | 3458 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 3459 | off = plt_index * GOT_ENTRY_SIZE; |
6de2ae4a | 3460 | base_got = htab->elf.igotplt; |
7afd84dc L |
3461 | } |
3462 | ||
3463 | if (h->dynindx == -1 | |
3464 | || h->forced_local | |
3465 | || info->symbolic) | |
3466 | { | |
eed180f8 | 3467 | /* This references the local defitionion. We must |
7afd84dc | 3468 | initialize this entry in the global offset table. |
eed180f8 | 3469 | Since the offset must always be a multiple of 8, |
7afd84dc L |
3470 | we use the least significant bit to record |
3471 | whether we have initialized it already. | |
3472 | ||
3473 | When doing a dynamic link, we create a .rela.got | |
3474 | relocation entry to initialize the value. This | |
3475 | is done in the finish_dynamic_symbol routine. */ | |
3476 | if ((off & 1) != 0) | |
3477 | off &= ~1; | |
3478 | else | |
3479 | { | |
3480 | bfd_put_64 (output_bfd, relocation, | |
3481 | base_got->contents + off); | |
3482 | /* Note that this is harmless for the GOTPLT64 | |
3483 | case, as -1 | 1 still is -1. */ | |
3484 | h->got.offset |= 1; | |
3485 | } | |
cbe950e9 L |
3486 | } |
3487 | } | |
3488 | ||
3489 | relocation = (base_got->output_section->vma | |
3490 | + base_got->output_offset + off); | |
3491 | ||
cbe950e9 L |
3492 | goto do_relocation; |
3493 | } | |
3494 | } | |
3495 | ||
70256ad8 AJ |
3496 | /* When generating a shared object, the relocations handled here are |
3497 | copied into the output file to be resolved at run time. */ | |
3498 | switch (r_type) | |
3499 | { | |
3500 | case R_X86_64_GOT32: | |
7b81dfbb | 3501 | case R_X86_64_GOT64: |
70256ad8 AJ |
3502 | /* Relocation is to the entry for this symbol in the global |
3503 | offset table. */ | |
70256ad8 | 3504 | case R_X86_64_GOTPCREL: |
7b81dfbb AJ |
3505 | case R_X86_64_GOTPCREL64: |
3506 | /* Use global offset table entry as symbol value. */ | |
3507 | case R_X86_64_GOTPLT64: | |
3508 | /* This is the same as GOT64 for relocation purposes, but | |
3509 | indicates the existence of a PLT entry. The difficulty is, | |
3510 | that we must calculate the GOT slot offset from the PLT | |
3511 | offset, if this symbol got a PLT entry (it was global). | |
3512 | Additionally if it's computed from the PLT entry, then that | |
3513 | GOT offset is relative to .got.plt, not to .got. */ | |
6de2ae4a | 3514 | base_got = htab->elf.sgot; |
7b81dfbb | 3515 | |
6de2ae4a | 3516 | if (htab->elf.sgot == NULL) |
c434dee6 | 3517 | abort (); |
053579d7 | 3518 | |
51e0a107 | 3519 | if (h != NULL) |
70256ad8 | 3520 | { |
b34976b6 | 3521 | bfd_boolean dyn; |
c434dee6 AJ |
3522 | |
3523 | off = h->got.offset; | |
7b81dfbb | 3524 | if (h->needs_plt |
eed180f8 | 3525 | && h->plt.offset != (bfd_vma)-1 |
7b81dfbb AJ |
3526 | && off == (bfd_vma)-1) |
3527 | { | |
3528 | /* We can't use h->got.offset here to save | |
3529 | state, or even just remember the offset, as | |
3530 | finish_dynamic_symbol would use that as offset into | |
3531 | .got. */ | |
eed180f8 | 3532 | bfd_vma plt_index = h->plt.offset / plt_entry_size - 1; |
7b81dfbb | 3533 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
6de2ae4a | 3534 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
3535 | } |
3536 | ||
c434dee6 | 3537 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 3538 | |
27482721 | 3539 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
51e0a107 | 3540 | || (info->shared |
27482721 | 3541 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
3542 | || (ELF_ST_VISIBILITY (h->other) |
3543 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
3544 | { |
3545 | /* This is actually a static link, or it is a -Bsymbolic | |
3546 | link and the symbol is defined locally, or the symbol | |
407443a3 | 3547 | was forced to be local because of a version file. We |
51e0a107 JH |
3548 | must initialize this entry in the global offset table. |
3549 | Since the offset must always be a multiple of 8, we | |
3550 | use the least significant bit to record whether we | |
3551 | have initialized it already. | |
3552 | ||
3553 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
3554 | relocation entry to initialize the value. This is |
3555 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
3556 | if ((off & 1) != 0) |
3557 | off &= ~1; | |
3558 | else | |
3559 | { | |
3560 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
3561 | base_got->contents + off); |
3562 | /* Note that this is harmless for the GOTPLT64 case, | |
eed180f8 | 3563 | as -1 | 1 still is -1. */ |
51e0a107 JH |
3564 | h->got.offset |= 1; |
3565 | } | |
3566 | } | |
053579d7 | 3567 | else |
b34976b6 | 3568 | unresolved_reloc = FALSE; |
70256ad8 | 3569 | } |
51e0a107 JH |
3570 | else |
3571 | { | |
c434dee6 AJ |
3572 | if (local_got_offsets == NULL) |
3573 | abort (); | |
51e0a107 JH |
3574 | |
3575 | off = local_got_offsets[r_symndx]; | |
3576 | ||
3577 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
3578 | the least significant bit to record whether we have |
3579 | already generated the necessary reloc. */ | |
51e0a107 JH |
3580 | if ((off & 1) != 0) |
3581 | off &= ~1; | |
3582 | else | |
3583 | { | |
c434dee6 | 3584 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 3585 | base_got->contents + off); |
51e0a107 JH |
3586 | |
3587 | if (info->shared) | |
3588 | { | |
947216bf | 3589 | asection *s; |
51e0a107 | 3590 | Elf_Internal_Rela outrel; |
70256ad8 | 3591 | |
51e0a107 JH |
3592 | /* We need to generate a R_X86_64_RELATIVE reloc |
3593 | for the dynamic linker. */ | |
6de2ae4a | 3594 | s = htab->elf.srelgot; |
947216bf | 3595 | if (s == NULL) |
c434dee6 | 3596 | abort (); |
51e0a107 | 3597 | |
7b81dfbb AJ |
3598 | outrel.r_offset = (base_got->output_section->vma |
3599 | + base_got->output_offset | |
51e0a107 | 3600 | + off); |
351f65ca | 3601 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
51e0a107 | 3602 | outrel.r_addend = relocation; |
351f65ca | 3603 | elf_append_rela (output_bfd, s, &outrel); |
51e0a107 JH |
3604 | } |
3605 | ||
3606 | local_got_offsets[r_symndx] |= 1; | |
3607 | } | |
51e0a107 | 3608 | } |
6a2bda3f | 3609 | |
c434dee6 AJ |
3610 | if (off >= (bfd_vma) -2) |
3611 | abort (); | |
3612 | ||
7b81dfbb AJ |
3613 | relocation = base_got->output_section->vma |
3614 | + base_got->output_offset + off; | |
3615 | if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
3616 | relocation -= htab->elf.sgotplt->output_section->vma |
3617 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 3618 | |
70256ad8 AJ |
3619 | break; |
3620 | ||
d6ab8113 JB |
3621 | case R_X86_64_GOTOFF64: |
3622 | /* Relocation is relative to the start of the global offset | |
3623 | table. */ | |
3624 | ||
3625 | /* Check to make sure it isn't a protected function symbol | |
3626 | for shared library since it may not be local when used | |
3627 | as function address. */ | |
bdb892b9 | 3628 | if (!info->executable |
d6ab8113 | 3629 | && h |
bdb892b9 | 3630 | && !SYMBOLIC_BIND (info, h) |
d6ab8113 JB |
3631 | && h->def_regular |
3632 | && h->type == STT_FUNC | |
3633 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
3634 | { | |
3635 | (*_bfd_error_handler) | |
3636 | (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"), | |
3637 | input_bfd, h->root.root.string); | |
3638 | bfd_set_error (bfd_error_bad_value); | |
3639 | return FALSE; | |
3640 | } | |
3641 | ||
3642 | /* Note that sgot is not involved in this | |
3643 | calculation. We always want the start of .got.plt. If we | |
3644 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
3645 | permitted by the ABI, we might have to change this | |
3646 | calculation. */ | |
6de2ae4a L |
3647 | relocation -= htab->elf.sgotplt->output_section->vma |
3648 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3649 | break; |
3650 | ||
3651 | case R_X86_64_GOTPC32: | |
7b81dfbb | 3652 | case R_X86_64_GOTPC64: |
d6ab8113 | 3653 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
3654 | relocation = htab->elf.sgotplt->output_section->vma |
3655 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3656 | unresolved_reloc = FALSE; |
3657 | break; | |
7b81dfbb AJ |
3658 | |
3659 | case R_X86_64_PLTOFF64: | |
3660 | /* Relocation is PLT entry relative to GOT. For local | |
3661 | symbols it's the symbol itself relative to GOT. */ | |
eed180f8 | 3662 | if (h != NULL |
7b81dfbb AJ |
3663 | /* See PLT32 handling. */ |
3664 | && h->plt.offset != (bfd_vma) -1 | |
6de2ae4a | 3665 | && htab->elf.splt != NULL) |
7b81dfbb | 3666 | { |
6de2ae4a L |
3667 | relocation = (htab->elf.splt->output_section->vma |
3668 | + htab->elf.splt->output_offset | |
7b81dfbb AJ |
3669 | + h->plt.offset); |
3670 | unresolved_reloc = FALSE; | |
3671 | } | |
3672 | ||
6de2ae4a L |
3673 | relocation -= htab->elf.sgotplt->output_section->vma |
3674 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 3675 | break; |
d6ab8113 | 3676 | |
70256ad8 AJ |
3677 | case R_X86_64_PLT32: |
3678 | /* Relocation is to the entry for this symbol in the | |
3679 | procedure linkage table. */ | |
3680 | ||
3681 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 3682 | without using the procedure linkage table. */ |
70256ad8 AJ |
3683 | if (h == NULL) |
3684 | break; | |
3685 | ||
c434dee6 | 3686 | if (h->plt.offset == (bfd_vma) -1 |
6de2ae4a | 3687 | || htab->elf.splt == NULL) |
70256ad8 AJ |
3688 | { |
3689 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
3690 | happens when statically linking PIC code, or when |
3691 | using -Bsymbolic. */ | |
70256ad8 AJ |
3692 | break; |
3693 | } | |
3694 | ||
6de2ae4a L |
3695 | relocation = (htab->elf.splt->output_section->vma |
3696 | + htab->elf.splt->output_offset | |
70256ad8 | 3697 | + h->plt.offset); |
b34976b6 | 3698 | unresolved_reloc = FALSE; |
70256ad8 AJ |
3699 | break; |
3700 | ||
fd8ab9e5 AJ |
3701 | case R_X86_64_PC8: |
3702 | case R_X86_64_PC16: | |
3703 | case R_X86_64_PC32: | |
6610a52d | 3704 | if (info->shared |
ba3bee0b | 3705 | && (input_section->flags & SEC_ALLOC) != 0 |
90f487df | 3706 | && (input_section->flags & SEC_READONLY) != 0 |
41bed6dd | 3707 | && h != NULL) |
6610a52d | 3708 | { |
41bed6dd L |
3709 | bfd_boolean fail = FALSE; |
3710 | bfd_boolean branch | |
3711 | = (r_type == R_X86_64_PC32 | |
3712 | && is_32bit_relative_branch (contents, rel->r_offset)); | |
3713 | ||
3714 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
3715 | { | |
3716 | /* Symbol is referenced locally. Make sure it is | |
3717 | defined locally or for a branch. */ | |
3718 | fail = !h->def_regular && !branch; | |
3719 | } | |
90f487df | 3720 | else |
41bed6dd L |
3721 | { |
3722 | /* Symbol isn't referenced locally. We only allow | |
3723 | branch to symbol with non-default visibility. */ | |
3724 | fail = (!branch | |
3725 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
3726 | } | |
3727 | ||
3728 | if (fail) | |
3729 | { | |
3730 | const char *fmt; | |
3731 | const char *v; | |
3732 | const char *pic = ""; | |
3733 | ||
3734 | switch (ELF_ST_VISIBILITY (h->other)) | |
3735 | { | |
3736 | case STV_HIDDEN: | |
3737 | v = _("hidden symbol"); | |
3738 | break; | |
3739 | case STV_INTERNAL: | |
3740 | v = _("internal symbol"); | |
3741 | break; | |
3742 | case STV_PROTECTED: | |
3743 | v = _("protected symbol"); | |
3744 | break; | |
3745 | default: | |
3746 | v = _("symbol"); | |
3747 | pic = _("; recompile with -fPIC"); | |
3748 | break; | |
3749 | } | |
3750 | ||
3751 | if (h->def_regular) | |
3752 | fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s"); | |
3753 | else | |
3754 | fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s"); | |
3755 | ||
3756 | (*_bfd_error_handler) (fmt, input_bfd, | |
3757 | x86_64_elf_howto_table[r_type].name, | |
3758 | v, h->root.root.string, pic); | |
3759 | bfd_set_error (bfd_error_bad_value); | |
3760 | return FALSE; | |
3761 | } | |
6610a52d L |
3762 | } |
3763 | /* Fall through. */ | |
3764 | ||
70256ad8 AJ |
3765 | case R_X86_64_8: |
3766 | case R_X86_64_16: | |
3767 | case R_X86_64_32: | |
d6ab8113 | 3768 | case R_X86_64_PC64: |
6b3db546 | 3769 | case R_X86_64_64: |
80643fbc | 3770 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 3771 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 3772 | |
b1e24c02 | 3773 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
3774 | break; |
3775 | ||
3776 | if ((info->shared | |
4bc6e03a AJ |
3777 | && (h == NULL |
3778 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3779 | || h->root.type != bfd_link_hash_undefweak) | |
d8045f23 NC |
3780 | && (! IS_X86_64_PCREL_TYPE (r_type) |
3781 | || ! SYMBOL_CALLS_LOCAL (info, h))) | |
d40d037c AJ |
3782 | || (ELIMINATE_COPY_RELOCS |
3783 | && !info->shared | |
c434dee6 AJ |
3784 | && h != NULL |
3785 | && h->dynindx != -1 | |
f5385ebf AM |
3786 | && !h->non_got_ref |
3787 | && ((h->def_dynamic | |
3788 | && !h->def_regular) | |
c434dee6 | 3789 | || h->root.type == bfd_link_hash_undefweak |
0f88be7a | 3790 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
3791 | { |
3792 | Elf_Internal_Rela outrel; | |
b34976b6 | 3793 | bfd_boolean skip, relocate; |
c434dee6 | 3794 | asection *sreloc; |
70256ad8 AJ |
3795 | |
3796 | /* When generating a shared object, these relocations | |
3797 | are copied into the output file to be resolved at run | |
407443a3 | 3798 | time. */ |
b34976b6 AM |
3799 | skip = FALSE; |
3800 | relocate = FALSE; | |
70256ad8 | 3801 | |
c629eae0 JJ |
3802 | outrel.r_offset = |
3803 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 3804 | rel->r_offset); |
c629eae0 | 3805 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 3806 | skip = TRUE; |
0fb19cbc | 3807 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 3808 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
3809 | |
3810 | outrel.r_offset += (input_section->output_section->vma | |
3811 | + input_section->output_offset); | |
3812 | ||
3813 | if (skip) | |
0bb2d96a | 3814 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 3815 | |
fd8ab9e5 AJ |
3816 | /* h->dynindx may be -1 if this symbol was marked to |
3817 | become local. */ | |
3818 | else if (h != NULL | |
c434dee6 | 3819 | && h->dynindx != -1 |
d8045f23 NC |
3820 | && (IS_X86_64_PCREL_TYPE (r_type) |
3821 | || ! info->shared | |
3822 | || ! SYMBOLIC_BIND (info, h) | |
3823 | || ! h->def_regular)) | |
70256ad8 | 3824 | { |
351f65ca | 3825 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 3826 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
3827 | } |
3828 | else | |
3829 | { | |
c434dee6 | 3830 | /* This symbol is local, or marked to become local. */ |
248775ba | 3831 | if (r_type == htab->pointer_r_type) |
607c0e09 | 3832 | { |
b34976b6 | 3833 | relocate = TRUE; |
351f65ca | 3834 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
3835 | outrel.r_addend = relocation + rel->r_addend; |
3836 | } | |
64d25c44 L |
3837 | else if (r_type == R_X86_64_64 |
3838 | && !ABI_64_P (output_bfd)) | |
3839 | { | |
3840 | relocate = TRUE; | |
3841 | outrel.r_info = htab->r_info (0, | |
3842 | R_X86_64_RELATIVE64); | |
3843 | outrel.r_addend = relocation + rel->r_addend; | |
8cf0d2dd L |
3844 | /* Check addend overflow. */ |
3845 | if ((outrel.r_addend & 0x80000000) | |
3846 | != (rel->r_addend & 0x80000000)) | |
3847 | { | |
3848 | const char *name; | |
268a8d3a | 3849 | int addend = rel->r_addend; |
8cf0d2dd L |
3850 | if (h && h->root.root.string) |
3851 | name = h->root.root.string; | |
3852 | else | |
3853 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3854 | sym, NULL); | |
6f2c9068 L |
3855 | if (addend < 0) |
3856 | (*_bfd_error_handler) | |
268a8d3a | 3857 | (_("%B: addend -0x%x in relocation %s against " |
6f2c9068 L |
3858 | "symbol `%s' at 0x%lx in section `%A' is " |
3859 | "out of range"), | |
3860 | input_bfd, input_section, addend, | |
3861 | x86_64_elf_howto_table[r_type].name, | |
3862 | name, (unsigned long) rel->r_offset); | |
3863 | else | |
3864 | (*_bfd_error_handler) | |
268a8d3a | 3865 | (_("%B: addend 0x%x in relocation %s against " |
6f2c9068 L |
3866 | "symbol `%s' at 0x%lx in section `%A' is " |
3867 | "out of range"), | |
3868 | input_bfd, input_section, addend, | |
3869 | x86_64_elf_howto_table[r_type].name, | |
3870 | name, (unsigned long) rel->r_offset); | |
8cf0d2dd L |
3871 | bfd_set_error (bfd_error_bad_value); |
3872 | return FALSE; | |
3873 | } | |
64d25c44 | 3874 | } |
607c0e09 AS |
3875 | else |
3876 | { | |
3877 | long sindx; | |
3878 | ||
8517fae7 | 3879 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
3880 | sindx = 0; |
3881 | else if (sec == NULL || sec->owner == NULL) | |
3882 | { | |
3883 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3884 | return FALSE; |
607c0e09 AS |
3885 | } |
3886 | else | |
3887 | { | |
3888 | asection *osec; | |
3889 | ||
74541ad4 AM |
3890 | /* We are turning this relocation into one |
3891 | against a section symbol. It would be | |
3892 | proper to subtract the symbol's value, | |
3893 | osec->vma, from the emitted reloc addend, | |
3894 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
3895 | osec = sec->output_section; |
3896 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
3897 | if (sindx == 0) |
3898 | { | |
3899 | asection *oi = htab->elf.text_index_section; | |
3900 | sindx = elf_section_data (oi)->dynindx; | |
3901 | } | |
3902 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
3903 | } |
3904 | ||
351f65ca | 3905 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
3906 | outrel.r_addend = relocation + rel->r_addend; |
3907 | } | |
70256ad8 AJ |
3908 | } |
3909 | ||
cbe950e9 | 3910 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 3911 | |
62d78908 L |
3912 | if (sreloc == NULL || sreloc->contents == NULL) |
3913 | { | |
3914 | r = bfd_reloc_notsupported; | |
3915 | goto check_relocation_error; | |
3916 | } | |
c434dee6 | 3917 | |
351f65ca | 3918 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
3919 | |
3920 | /* If this reloc is against an external symbol, we do | |
3921 | not want to fiddle with the addend. Otherwise, we | |
3922 | need to include the symbol value so that it becomes | |
3923 | an addend for the dynamic reloc. */ | |
0f88be7a | 3924 | if (! relocate) |
70256ad8 AJ |
3925 | continue; |
3926 | } | |
3927 | ||
3928 | break; | |
3929 | ||
bffbf940 | 3930 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
3931 | case R_X86_64_GOTPC32_TLSDESC: |
3932 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 3933 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
3934 | tls_type = GOT_UNKNOWN; |
3935 | if (h == NULL && local_got_offsets) | |
351f65ca | 3936 | tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 3937 | else if (h != NULL) |
351f65ca | 3938 | tls_type = elf_x86_64_hash_entry (h)->tls_type; |
142411ca | 3939 | |
351f65ca L |
3940 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3941 | input_section, contents, | |
3942 | symtab_hdr, sym_hashes, | |
3943 | &r_type, tls_type, rel, | |
3944 | relend, h, r_symndx)) | |
534a31f6 | 3945 | return FALSE; |
bffbf940 JJ |
3946 | |
3947 | if (r_type == R_X86_64_TPOFF32) | |
3948 | { | |
142411ca L |
3949 | bfd_vma roff = rel->r_offset; |
3950 | ||
bffbf940 | 3951 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 3952 | |
351f65ca | 3953 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 3954 | { |
52bc799a | 3955 | /* GD->LE transition. For 64bit, change |
abcf1d52 | 3956 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
a3fadc9a | 3957 | .word 0x6666; rex64; call __tls_get_addr |
52bc799a | 3958 | into: |
bffbf940 | 3959 | movq %fs:0, %rax |
52bc799a L |
3960 | leaq foo@tpoff(%rax), %rax |
3961 | For 32bit, change | |
3962 | leaq foo@tlsgd(%rip), %rdi | |
3963 | .word 0x6666; rex64; call __tls_get_addr | |
3964 | into: | |
3965 | movl %fs:0, %eax | |
bffbf940 | 3966 | leaq foo@tpoff(%rax), %rax */ |
52bc799a L |
3967 | if (ABI_64_P (output_bfd)) |
3968 | memcpy (contents + roff - 4, | |
3969 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3970 | 16); | |
3971 | else | |
3972 | memcpy (contents + roff - 3, | |
3973 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3974 | 15); | |
eb4ff4d6 | 3975 | bfd_put_32 (output_bfd, |
351f65ca | 3976 | elf_x86_64_tpoff (info, relocation), |
142411ca | 3977 | contents + roff + 8); |
a3fadc9a | 3978 | /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ |
bffbf940 JJ |
3979 | rel++; |
3980 | continue; | |
3981 | } | |
351f65ca | 3982 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
3983 | { |
3984 | /* GDesc -> LE transition. | |
3985 | It's originally something like: | |
3986 | leaq x@tlsdesc(%rip), %rax | |
3987 | ||
3988 | Change it to: | |
c9736ba0 | 3989 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 3990 | |
c9736ba0 | 3991 | unsigned int val, type; |
67a4f2b7 | 3992 | |
67a4f2b7 | 3993 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 3994 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
3995 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
3996 | contents + roff - 3); | |
3997 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
3998 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3999 | contents + roff - 1); | |
eb4ff4d6 | 4000 | bfd_put_32 (output_bfd, |
351f65ca | 4001 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
4002 | contents + roff); |
4003 | continue; | |
4004 | } | |
351f65ca | 4005 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
4006 | { |
4007 | /* GDesc -> LE transition. | |
4008 | It's originally: | |
4009 | call *(%rax) | |
4010 | Turn it into: | |
142411ca | 4011 | xchg %ax,%ax. */ |
10efb593 | 4012 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
4013 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4014 | continue; | |
4015 | } | |
351f65ca | 4016 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 4017 | { |
bffbf940 JJ |
4018 | /* IE->LE transition: |
4019 | Originally it can be one of: | |
4020 | movq foo@gottpoff(%rip), %reg | |
4021 | addq foo@gottpoff(%rip), %reg | |
4022 | We change it into: | |
4023 | movq $foo, %reg | |
4024 | leaq foo(%reg), %reg | |
4025 | addq $foo, %reg. */ | |
142411ca L |
4026 | |
4027 | unsigned int val, type, reg; | |
4028 | ||
4029 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
4030 | type = bfd_get_8 (input_bfd, contents + roff - 2); | |
4031 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 4032 | reg >>= 3; |
bffbf940 JJ |
4033 | if (type == 0x8b) |
4034 | { | |
4035 | /* movq */ | |
4036 | if (val == 0x4c) | |
4037 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 4038 | contents + roff - 3); |
4a4c5f25 L |
4039 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4040 | bfd_put_8 (output_bfd, 0x41, | |
4041 | contents + roff - 3); | |
bffbf940 | 4042 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 4043 | contents + roff - 2); |
bffbf940 | 4044 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 4045 | contents + roff - 1); |
bffbf940 JJ |
4046 | } |
4047 | else if (reg == 4) | |
4048 | { | |
4049 | /* addq -> addq - addressing with %rsp/%r12 is | |
4050 | special */ | |
4051 | if (val == 0x4c) | |
4052 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 4053 | contents + roff - 3); |
4a4c5f25 L |
4054 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4055 | bfd_put_8 (output_bfd, 0x41, | |
4056 | contents + roff - 3); | |
bffbf940 | 4057 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 4058 | contents + roff - 2); |
bffbf940 | 4059 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 4060 | contents + roff - 1); |
bffbf940 JJ |
4061 | } |
4062 | else | |
4063 | { | |
4064 | /* addq -> leaq */ | |
4065 | if (val == 0x4c) | |
4066 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 4067 | contents + roff - 3); |
4a4c5f25 L |
4068 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
4069 | bfd_put_8 (output_bfd, 0x45, | |
4070 | contents + roff - 3); | |
bffbf940 | 4071 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 4072 | contents + roff - 2); |
bffbf940 | 4073 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 4074 | contents + roff - 1); |
bffbf940 | 4075 | } |
eb4ff4d6 | 4076 | bfd_put_32 (output_bfd, |
351f65ca | 4077 | elf_x86_64_tpoff (info, relocation), |
142411ca | 4078 | contents + roff); |
bffbf940 JJ |
4079 | continue; |
4080 | } | |
142411ca L |
4081 | else |
4082 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
4083 | } |
4084 | ||
6de2ae4a | 4085 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
4086 | abort (); |
4087 | ||
4088 | if (h != NULL) | |
67a4f2b7 AO |
4089 | { |
4090 | off = h->got.offset; | |
351f65ca | 4091 | offplt = elf_x86_64_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 4092 | } |
bffbf940 JJ |
4093 | else |
4094 | { | |
4095 | if (local_got_offsets == NULL) | |
4096 | abort (); | |
4097 | ||
4098 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 4099 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
4100 | } |
4101 | ||
4102 | if ((off & 1) != 0) | |
4103 | off &= ~1; | |
26e41594 | 4104 | else |
bffbf940 JJ |
4105 | { |
4106 | Elf_Internal_Rela outrel; | |
bffbf940 | 4107 | int dr_type, indx; |
67a4f2b7 | 4108 | asection *sreloc; |
bffbf940 | 4109 | |
6de2ae4a | 4110 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
4111 | abort (); |
4112 | ||
67a4f2b7 AO |
4113 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4114 | ||
4115 | if (GOT_TLS_GDESC_P (tls_type)) | |
4116 | { | |
351f65ca | 4117 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 4118 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
4119 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
4120 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4121 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4122 | + offplt |
4123 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4124 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4125 | if (indx == 0) |
351f65ca | 4126 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
67a4f2b7 AO |
4127 | else |
4128 | outrel.r_addend = 0; | |
351f65ca | 4129 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
4130 | } |
4131 | ||
6de2ae4a | 4132 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4133 | |
6de2ae4a L |
4134 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4135 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 4136 | |
67a4f2b7 | 4137 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 4138 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
4139 | else if (GOT_TLS_GDESC_P (tls_type)) |
4140 | goto dr_done; | |
bffbf940 JJ |
4141 | else |
4142 | dr_type = R_X86_64_TPOFF64; | |
4143 | ||
6de2ae4a | 4144 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 4145 | outrel.r_addend = 0; |
67a4f2b7 AO |
4146 | if ((dr_type == R_X86_64_TPOFF64 |
4147 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
351f65ca L |
4148 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
4149 | outrel.r_info = htab->r_info (indx, dr_type); | |
bffbf940 | 4150 | |
351f65ca | 4151 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 4152 | |
67a4f2b7 | 4153 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
4154 | { |
4155 | if (indx == 0) | |
4156 | { | |
d40d037c | 4157 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 4158 | bfd_put_64 (output_bfd, |
351f65ca | 4159 | relocation - elf_x86_64_dtpoff_base (info), |
6de2ae4a | 4160 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
4161 | } |
4162 | else | |
4163 | { | |
4164 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 4165 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 4166 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
4167 | R_X86_64_DTPOFF64); |
4168 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 4169 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 4170 | &outrel); |
bffbf940 JJ |
4171 | } |
4172 | } | |
4173 | ||
67a4f2b7 | 4174 | dr_done: |
bffbf940 JJ |
4175 | if (h != NULL) |
4176 | h->got.offset |= 1; | |
4177 | else | |
4178 | local_got_offsets[r_symndx] |= 1; | |
4179 | } | |
4180 | ||
67a4f2b7 AO |
4181 | if (off >= (bfd_vma) -2 |
4182 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 4183 | abort (); |
351f65ca | 4184 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 4185 | { |
67a4f2b7 AO |
4186 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
4187 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
4188 | relocation = htab->elf.sgotplt->output_section->vma |
4189 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4190 | + offplt + htab->sgotplt_jump_table_size; |
4191 | else | |
6de2ae4a L |
4192 | relocation = htab->elf.sgot->output_section->vma |
4193 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 4194 | unresolved_reloc = FALSE; |
bffbf940 | 4195 | } |
142411ca | 4196 | else |
67a4f2b7 | 4197 | { |
142411ca | 4198 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 4199 | |
351f65ca | 4200 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 4201 | { |
52bc799a | 4202 | /* GD->IE transition. For 64bit, change |
142411ca L |
4203 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
4204 | .word 0x6666; rex64; call __tls_get_addr@plt | |
52bc799a | 4205 | into: |
142411ca | 4206 | movq %fs:0, %rax |
52bc799a L |
4207 | addq foo@gottpoff(%rip), %rax |
4208 | For 32bit, change | |
4209 | leaq foo@tlsgd(%rip), %rdi | |
4210 | .word 0x6666; rex64; call __tls_get_addr@plt | |
4211 | into: | |
4212 | movl %fs:0, %eax | |
142411ca | 4213 | addq foo@gottpoff(%rip), %rax */ |
52bc799a L |
4214 | if (ABI_64_P (output_bfd)) |
4215 | memcpy (contents + roff - 4, | |
4216 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
4217 | 16); | |
4218 | else | |
4219 | memcpy (contents + roff - 3, | |
4220 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
4221 | 15); | |
142411ca | 4222 | |
6de2ae4a L |
4223 | relocation = (htab->elf.sgot->output_section->vma |
4224 | + htab->elf.sgot->output_offset + off | |
142411ca L |
4225 | - roff |
4226 | - input_section->output_section->vma | |
4227 | - input_section->output_offset | |
4228 | - 12); | |
4229 | bfd_put_32 (output_bfd, relocation, | |
4230 | contents + roff + 8); | |
4231 | /* Skip R_X86_64_PLT32. */ | |
4232 | rel++; | |
4233 | continue; | |
4234 | } | |
351f65ca | 4235 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
4236 | { |
4237 | /* GDesc -> IE transition. | |
4238 | It's originally something like: | |
4239 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 4240 | |
142411ca | 4241 | Change it to: |
c9736ba0 | 4242 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 4243 | |
142411ca L |
4244 | /* Now modify the instruction as appropriate. To |
4245 | turn a leaq into a movq in the form we use it, it | |
4246 | suffices to change the second byte from 0x8d to | |
4247 | 0x8b. */ | |
4248 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
4249 | ||
4250 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4251 | htab->elf.sgot->output_section->vma |
4252 | + htab->elf.sgot->output_offset + off | |
142411ca L |
4253 | - rel->r_offset |
4254 | - input_section->output_section->vma | |
4255 | - input_section->output_offset | |
4256 | - 4, | |
4257 | contents + roff); | |
4258 | continue; | |
4259 | } | |
351f65ca | 4260 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
4261 | { |
4262 | /* GDesc -> IE transition. | |
4263 | It's originally: | |
4264 | call *(%rax) | |
4265 | ||
4266 | Change it to: | |
c9736ba0 | 4267 | xchg %ax, %ax. */ |
142411ca | 4268 | |
142411ca L |
4269 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
4270 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
4271 | continue; | |
4272 | } | |
4273 | else | |
4274 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 4275 | } |
bffbf940 JJ |
4276 | break; |
4277 | ||
4278 | case R_X86_64_TLSLD: | |
351f65ca L |
4279 | if (! elf_x86_64_tls_transition (info, input_bfd, |
4280 | input_section, contents, | |
4281 | symtab_hdr, sym_hashes, | |
4282 | &r_type, GOT_UNKNOWN, | |
4283 | rel, relend, h, r_symndx)) | |
142411ca | 4284 | return FALSE; |
a3fadc9a | 4285 | |
142411ca L |
4286 | if (r_type != R_X86_64_TLSLD) |
4287 | { | |
bffbf940 | 4288 | /* LD->LE transition: |
a3fadc9a | 4289 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr. |
52bc799a L |
4290 | For 64bit, we change it into: |
4291 | .word 0x6666; .byte 0x66; movq %fs:0, %rax. | |
4292 | For 32bit, we change it into: | |
4293 | nopl 0x0(%rax); movl %fs:0, %eax. */ | |
142411ca L |
4294 | |
4295 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
52bc799a L |
4296 | if (ABI_64_P (output_bfd)) |
4297 | memcpy (contents + rel->r_offset - 3, | |
4298 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
4299 | else | |
4300 | memcpy (contents + rel->r_offset - 3, | |
4301 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
a3fadc9a | 4302 | /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ |
bffbf940 JJ |
4303 | rel++; |
4304 | continue; | |
4305 | } | |
4306 | ||
6de2ae4a | 4307 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
4308 | abort (); |
4309 | ||
4310 | off = htab->tls_ld_got.offset; | |
4311 | if (off & 1) | |
4312 | off &= ~1; | |
4313 | else | |
4314 | { | |
4315 | Elf_Internal_Rela outrel; | |
bffbf940 | 4316 | |
6de2ae4a | 4317 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
4318 | abort (); |
4319 | ||
6de2ae4a L |
4320 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4321 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
4322 | |
4323 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 4324 | htab->elf.sgot->contents + off); |
bffbf940 | 4325 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 4326 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 4327 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 4328 | outrel.r_addend = 0; |
351f65ca | 4329 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 4330 | &outrel); |
bffbf940 JJ |
4331 | htab->tls_ld_got.offset |= 1; |
4332 | } | |
6de2ae4a L |
4333 | relocation = htab->elf.sgot->output_section->vma |
4334 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 4335 | unresolved_reloc = FALSE; |
bffbf940 JJ |
4336 | break; |
4337 | ||
4338 | case R_X86_64_DTPOFF32: | |
1d85728f | 4339 | if (!info->executable|| (input_section->flags & SEC_CODE) == 0) |
351f65ca | 4340 | relocation -= elf_x86_64_dtpoff_base (info); |
bffbf940 | 4341 | else |
351f65ca | 4342 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
4343 | break; |
4344 | ||
4345 | case R_X86_64_TPOFF32: | |
6769d501 | 4346 | case R_X86_64_TPOFF64: |
9b769489 | 4347 | BFD_ASSERT (info->executable); |
351f65ca | 4348 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
4349 | break; |
4350 | ||
70256ad8 AJ |
4351 | default: |
4352 | break; | |
4353 | } | |
8d88c4ca | 4354 | |
239e1f3a AM |
4355 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
4356 | because such sections are not SEC_ALLOC and thus ld.so will | |
4357 | not process them. */ | |
c434dee6 | 4358 | if (unresolved_reloc |
239e1f3a | 4359 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
4360 | && h->def_dynamic) |
4361 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
4362 | rel->r_offset) != (bfd_vma) -1) | |
a040981f L |
4363 | { |
4364 | (*_bfd_error_handler) | |
4365 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), | |
4366 | input_bfd, | |
4367 | input_section, | |
4368 | (long) rel->r_offset, | |
4369 | howto->name, | |
4370 | h->root.root.string); | |
4371 | return FALSE; | |
4372 | } | |
c434dee6 | 4373 | |
cbe950e9 | 4374 | do_relocation: |
8d88c4ca | 4375 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
4376 | contents, rel->r_offset, |
4377 | relocation, rel->r_addend); | |
8d88c4ca | 4378 | |
62d78908 | 4379 | check_relocation_error: |
8d88c4ca | 4380 | if (r != bfd_reloc_ok) |
8da6118f | 4381 | { |
c434dee6 AJ |
4382 | const char *name; |
4383 | ||
4384 | if (h != NULL) | |
4385 | name = h->root.root.string; | |
4386 | else | |
8da6118f | 4387 | { |
c434dee6 AJ |
4388 | name = bfd_elf_string_from_elf_section (input_bfd, |
4389 | symtab_hdr->sh_link, | |
4390 | sym->st_name); | |
4391 | if (name == NULL) | |
b34976b6 | 4392 | return FALSE; |
c434dee6 AJ |
4393 | if (*name == '\0') |
4394 | name = bfd_section_name (input_bfd, sec); | |
4395 | } | |
4396 | ||
4397 | if (r == bfd_reloc_overflow) | |
4398 | { | |
c434dee6 | 4399 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
4400 | (info, (h ? &h->root : NULL), name, howto->name, |
4401 | (bfd_vma) 0, input_bfd, input_section, | |
4402 | rel->r_offset))) | |
b34976b6 | 4403 | return FALSE; |
c434dee6 AJ |
4404 | } |
4405 | else | |
4406 | { | |
4407 | (*_bfd_error_handler) | |
bb95161d | 4408 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
d003868e | 4409 | input_bfd, input_section, |
c434dee6 | 4410 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 4411 | return FALSE; |
8da6118f KH |
4412 | } |
4413 | } | |
8d88c4ca | 4414 | } |
70256ad8 | 4415 | |
b34976b6 | 4416 | return TRUE; |
70256ad8 AJ |
4417 | } |
4418 | ||
4419 | /* Finish up dynamic symbol handling. We set the contents of various | |
4420 | dynamic sections here. */ | |
4421 | ||
b34976b6 | 4422 | static bfd_boolean |
351f65ca L |
4423 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
4424 | struct bfd_link_info *info, | |
4425 | struct elf_link_hash_entry *h, | |
220cf809 | 4426 | Elf_Internal_Sym *sym ATTRIBUTE_UNUSED) |
70256ad8 | 4427 | { |
351f65ca | 4428 | struct elf_x86_64_link_hash_table *htab; |
eed180f8 RM |
4429 | const struct elf_x86_64_backend_data *const abed |
4430 | = get_elf_x86_64_backend_data (output_bfd); | |
70256ad8 | 4431 | |
351f65ca | 4432 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4433 | if (htab == NULL) |
4434 | return FALSE; | |
70256ad8 AJ |
4435 | |
4436 | if (h->plt.offset != (bfd_vma) -1) | |
4437 | { | |
70256ad8 AJ |
4438 | bfd_vma plt_index; |
4439 | bfd_vma got_offset; | |
4440 | Elf_Internal_Rela rela; | |
947216bf | 4441 | bfd_byte *loc; |
cbe950e9 | 4442 | asection *plt, *gotplt, *relplt; |
351f65ca | 4443 | const struct elf_backend_data *bed; |
cbe950e9 L |
4444 | |
4445 | /* When building a static executable, use .iplt, .igot.plt and | |
4446 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 4447 | if (htab->elf.splt != NULL) |
cbe950e9 | 4448 | { |
6de2ae4a L |
4449 | plt = htab->elf.splt; |
4450 | gotplt = htab->elf.sgotplt; | |
4451 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
4452 | } |
4453 | else | |
4454 | { | |
6de2ae4a L |
4455 | plt = htab->elf.iplt; |
4456 | gotplt = htab->elf.igotplt; | |
4457 | relplt = htab->elf.irelplt; | |
cbe950e9 | 4458 | } |
70256ad8 AJ |
4459 | |
4460 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 4461 | it up. */ |
cbe950e9 L |
4462 | if ((h->dynindx == -1 |
4463 | && !((h->forced_local || info->executable) | |
4464 | && h->def_regular | |
4465 | && h->type == STT_GNU_IFUNC)) | |
4466 | || plt == NULL | |
4467 | || gotplt == NULL | |
4468 | || relplt == NULL) | |
f6df62c8 | 4469 | return FALSE; |
70256ad8 AJ |
4470 | |
4471 | /* Get the index in the procedure linkage table which | |
4472 | corresponds to this symbol. This is the index of this symbol | |
4473 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 4474 | first entry in the procedure linkage table is reserved. |
6bbec505 | 4475 | |
cbe950e9 | 4476 | Get the offset into the .got table of the entry that |
407443a3 | 4477 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
4478 | bytes. The first three are reserved for the dynamic linker. |
4479 | ||
4480 | For static executables, we don't reserve anything. */ | |
4481 | ||
6de2ae4a | 4482 | if (plt == htab->elf.splt) |
cbe950e9 | 4483 | { |
eed180f8 | 4484 | got_offset = h->plt.offset / abed->plt_entry_size - 1; |
e1f98742 | 4485 | got_offset = (got_offset + 3) * GOT_ENTRY_SIZE; |
cbe950e9 L |
4486 | } |
4487 | else | |
4488 | { | |
eed180f8 | 4489 | got_offset = h->plt.offset / abed->plt_entry_size; |
e1f98742 | 4490 | got_offset = got_offset * GOT_ENTRY_SIZE; |
cbe950e9 | 4491 | } |
70256ad8 AJ |
4492 | |
4493 | /* Fill in the entry in the procedure linkage table. */ | |
eed180f8 RM |
4494 | memcpy (plt->contents + h->plt.offset, abed->plt_entry, |
4495 | abed->plt_entry_size); | |
4496 | ||
4497 | /* Insert the relocation positions of the plt section. */ | |
4498 | ||
4499 | /* Put offset the PC-relative instruction referring to the GOT entry, | |
4500 | subtracting the size of that instruction. */ | |
653165cc | 4501 | bfd_put_32 (output_bfd, |
eed180f8 RM |
4502 | (gotplt->output_section->vma |
4503 | + gotplt->output_offset | |
4504 | + got_offset | |
4505 | - plt->output_section->vma | |
4506 | - plt->output_offset | |
4507 | - h->plt.offset | |
4508 | - abed->plt_got_insn_size), | |
4509 | plt->contents + h->plt.offset + abed->plt_got_offset); | |
cbe950e9 | 4510 | |
653165cc | 4511 | /* Fill in the entry in the global offset table, initially this |
eed180f8 | 4512 | points to the second part of the PLT entry. */ |
cbe950e9 L |
4513 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4514 | + plt->output_offset | |
eed180f8 | 4515 | + h->plt.offset + abed->plt_lazy_offset), |
cbe950e9 | 4516 | gotplt->contents + got_offset); |
70256ad8 AJ |
4517 | |
4518 | /* Fill in the entry in the .rela.plt section. */ | |
cbe950e9 L |
4519 | rela.r_offset = (gotplt->output_section->vma |
4520 | + gotplt->output_offset | |
70256ad8 | 4521 | + got_offset); |
cbe950e9 L |
4522 | if (h->dynindx == -1 |
4523 | || ((info->executable | |
4524 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
4525 | && h->def_regular | |
4526 | && h->type == STT_GNU_IFUNC)) | |
4527 | { | |
4528 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
4529 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
351f65ca | 4530 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
cbe950e9 L |
4531 | rela.r_addend = (h->root.u.def.value |
4532 | + h->root.u.def.section->output_section->vma | |
4533 | + h->root.u.def.section->output_offset); | |
e1f98742 L |
4534 | /* R_X86_64_IRELATIVE comes last. */ |
4535 | plt_index = htab->next_irelative_index--; | |
cbe950e9 L |
4536 | } |
4537 | else | |
4538 | { | |
351f65ca | 4539 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); |
cbe950e9 | 4540 | rela.r_addend = 0; |
e1f98742 L |
4541 | plt_index = htab->next_jump_slot_index++; |
4542 | } | |
4543 | ||
4544 | /* Don't fill PLT entry for static executables. */ | |
4545 | if (plt == htab->elf.splt) | |
4546 | { | |
4547 | /* Put relocation index. */ | |
4548 | bfd_put_32 (output_bfd, plt_index, | |
eed180f8 | 4549 | plt->contents + h->plt.offset + abed->plt_reloc_offset); |
e1f98742 | 4550 | /* Put offset for jmp .PLT0. */ |
eed180f8 RM |
4551 | bfd_put_32 (output_bfd, - (h->plt.offset + abed->plt_plt_insn_end), |
4552 | plt->contents + h->plt.offset + abed->plt_plt_offset); | |
cbe950e9 | 4553 | } |
351f65ca L |
4554 | |
4555 | bed = get_elf_backend_data (output_bfd); | |
4556 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
82e96e07 | 4557 | bed->s->swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 | 4558 | |
f5385ebf | 4559 | if (!h->def_regular) |
70256ad8 AJ |
4560 | { |
4561 | /* Mark the symbol as undefined, rather than as defined in | |
47a9f7b3 JJ |
4562 | the .plt section. Leave the value if there were any |
4563 | relocations where pointer equality matters (this is a clue | |
c434dee6 AJ |
4564 | for the dynamic linker, to make function pointer |
4565 | comparisons work between an application and shared | |
47a9f7b3 JJ |
4566 | library), otherwise set it to zero. If a function is only |
4567 | called from a binary, there is no need to slow down | |
4568 | shared libraries because of that. */ | |
70256ad8 | 4569 | sym->st_shndx = SHN_UNDEF; |
f5385ebf | 4570 | if (!h->pointer_equality_needed) |
47a9f7b3 | 4571 | sym->st_value = 0; |
70256ad8 AJ |
4572 | } |
4573 | } | |
4574 | ||
bffbf940 | 4575 | if (h->got.offset != (bfd_vma) -1 |
351f65ca L |
4576 | && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type) |
4577 | && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE) | |
053579d7 | 4578 | { |
053579d7 AJ |
4579 | Elf_Internal_Rela rela; |
4580 | ||
4581 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 4582 | up. */ |
6de2ae4a | 4583 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 4584 | abort (); |
053579d7 | 4585 | |
6de2ae4a L |
4586 | rela.r_offset = (htab->elf.sgot->output_section->vma |
4587 | + htab->elf.sgot->output_offset | |
dc810e39 | 4588 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
4589 | |
4590 | /* If this is a static link, or it is a -Bsymbolic link and the | |
4591 | symbol is defined locally or was forced to be local because | |
4592 | of a version file, we just want to emit a RELATIVE reloc. | |
4593 | The entry in the global offset table will already have been | |
4594 | initialized in the relocate_section function. */ | |
710ab287 | 4595 | if (h->def_regular |
0018b0a3 L |
4596 | && h->type == STT_GNU_IFUNC) |
4597 | { | |
710ab287 L |
4598 | if (info->shared) |
4599 | { | |
4600 | /* Generate R_X86_64_GLOB_DAT. */ | |
4601 | goto do_glob_dat; | |
4602 | } | |
4603 | else | |
4604 | { | |
90d60710 L |
4605 | asection *plt; |
4606 | ||
710ab287 L |
4607 | if (!h->pointer_equality_needed) |
4608 | abort (); | |
4609 | ||
4610 | /* For non-shared object, we can't use .got.plt, which | |
4611 | contains the real function addres if we need pointer | |
4612 | equality. We load the GOT entry with the PLT entry. */ | |
90d60710 | 4613 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
4614 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4615 | + plt->output_offset | |
4616 | + h->plt.offset), | |
6de2ae4a | 4617 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
4618 | return TRUE; |
4619 | } | |
0018b0a3 L |
4620 | } |
4621 | else if (info->shared | |
4622 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
053579d7 | 4623 | { |
41bed6dd L |
4624 | if (!h->def_regular) |
4625 | return FALSE; | |
cc78d0af | 4626 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 4627 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
4628 | rela.r_addend = (h->root.u.def.value |
4629 | + h->root.u.def.section->output_section->vma | |
4630 | + h->root.u.def.section->output_offset); | |
4631 | } | |
4632 | else | |
4633 | { | |
4634 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 4635 | do_glob_dat: |
c434dee6 | 4636 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4637 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 4638 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
4639 | rela.r_addend = 0; |
4640 | } | |
4641 | ||
351f65ca | 4642 | elf_append_rela (output_bfd, htab->elf.srelgot, &rela); |
053579d7 AJ |
4643 | } |
4644 | ||
f5385ebf | 4645 | if (h->needs_copy) |
70256ad8 | 4646 | { |
70256ad8 AJ |
4647 | Elf_Internal_Rela rela; |
4648 | ||
4649 | /* This symbol needs a copy reloc. Set it up. */ | |
4650 | ||
c434dee6 AJ |
4651 | if (h->dynindx == -1 |
4652 | || (h->root.type != bfd_link_hash_defined | |
4653 | && h->root.type != bfd_link_hash_defweak) | |
4654 | || htab->srelbss == NULL) | |
4655 | abort (); | |
70256ad8 AJ |
4656 | |
4657 | rela.r_offset = (h->root.u.def.value | |
4658 | + h->root.u.def.section->output_section->vma | |
4659 | + h->root.u.def.section->output_offset); | |
351f65ca | 4660 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 4661 | rela.r_addend = 0; |
351f65ca | 4662 | elf_append_rela (output_bfd, htab->srelbss, &rela); |
70256ad8 AJ |
4663 | } |
4664 | ||
b34976b6 | 4665 | return TRUE; |
70256ad8 AJ |
4666 | } |
4667 | ||
c25bc9fc L |
4668 | /* Finish up local dynamic symbol handling. We set the contents of |
4669 | various dynamic sections here. */ | |
4670 | ||
4671 | static bfd_boolean | |
351f65ca | 4672 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
4673 | { |
4674 | struct elf_link_hash_entry *h | |
4675 | = (struct elf_link_hash_entry *) *slot; | |
4676 | struct bfd_link_info *info | |
eed180f8 | 4677 | = (struct bfd_link_info *) inf; |
c25bc9fc | 4678 | |
351f65ca | 4679 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
c25bc9fc L |
4680 | info, h, NULL); |
4681 | } | |
4682 | ||
c434dee6 AJ |
4683 | /* Used to decide how to sort relocs in an optimal manner for the |
4684 | dynamic linker, before writing them out. */ | |
4685 | ||
4686 | static enum elf_reloc_type_class | |
351f65ca | 4687 | elf_x86_64_reloc_type_class (const Elf_Internal_Rela *rela) |
c434dee6 | 4688 | { |
351f65ca | 4689 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 AJ |
4690 | { |
4691 | case R_X86_64_RELATIVE: | |
1da80baa | 4692 | case R_X86_64_RELATIVE64: |
c434dee6 AJ |
4693 | return reloc_class_relative; |
4694 | case R_X86_64_JUMP_SLOT: | |
4695 | return reloc_class_plt; | |
4696 | case R_X86_64_COPY: | |
4697 | return reloc_class_copy; | |
4698 | default: | |
4699 | return reloc_class_normal; | |
4700 | } | |
4701 | } | |
4702 | ||
70256ad8 AJ |
4703 | /* Finish up the dynamic sections. */ |
4704 | ||
b34976b6 | 4705 | static bfd_boolean |
351f65ca L |
4706 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
4707 | struct bfd_link_info *info) | |
70256ad8 | 4708 | { |
351f65ca | 4709 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
4710 | bfd *dynobj; |
4711 | asection *sdyn; | |
eed180f8 RM |
4712 | const struct elf_x86_64_backend_data *const abed |
4713 | = get_elf_x86_64_backend_data (output_bfd); | |
70256ad8 | 4714 | |
351f65ca | 4715 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4716 | if (htab == NULL) |
4717 | return FALSE; | |
4718 | ||
c434dee6 | 4719 | dynobj = htab->elf.dynobj; |
3d4d4302 | 4720 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
70256ad8 | 4721 | |
c434dee6 | 4722 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 4723 | { |
82e96e07 L |
4724 | bfd_byte *dyncon, *dynconend; |
4725 | const struct elf_backend_data *bed; | |
4726 | bfd_size_type sizeof_dyn; | |
70256ad8 | 4727 | |
6de2ae4a | 4728 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 4729 | abort (); |
70256ad8 | 4730 | |
82e96e07 L |
4731 | bed = get_elf_backend_data (dynobj); |
4732 | sizeof_dyn = bed->s->sizeof_dyn; | |
4733 | dyncon = sdyn->contents; | |
4734 | dynconend = sdyn->contents + sdyn->size; | |
4735 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
4736 | { |
4737 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
4738 | asection *s; |
4739 | ||
82e96e07 | 4740 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
4741 | |
4742 | switch (dyn.d_tag) | |
4743 | { | |
4744 | default: | |
053579d7 | 4745 | continue; |
70256ad8 AJ |
4746 | |
4747 | case DT_PLTGOT: | |
6de2ae4a | 4748 | s = htab->elf.sgotplt; |
8c37241b | 4749 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 4750 | break; |
70256ad8 AJ |
4751 | |
4752 | case DT_JMPREL: | |
6de2ae4a | 4753 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 4754 | break; |
70256ad8 | 4755 | |
c434dee6 | 4756 | case DT_PLTRELSZ: |
6de2ae4a | 4757 | s = htab->elf.srelplt->output_section; |
eea6121a | 4758 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
4759 | break; |
4760 | ||
4761 | case DT_RELASZ: | |
c434dee6 AJ |
4762 | /* The procedure linkage table relocs (DT_JMPREL) should |
4763 | not be included in the overall relocs (DT_RELA). | |
4764 | Therefore, we override the DT_RELASZ entry here to | |
4765 | make it not include the JMPREL relocs. Since the | |
4766 | linker script arranges for .rela.plt to follow all | |
4767 | other relocation sections, we don't have to worry | |
4768 | about changing the DT_RELA entry. */ | |
6de2ae4a | 4769 | if (htab->elf.srelplt != NULL) |
70256ad8 | 4770 | { |
6de2ae4a | 4771 | s = htab->elf.srelplt->output_section; |
eea6121a | 4772 | dyn.d_un.d_val -= s->size; |
70256ad8 AJ |
4773 | } |
4774 | break; | |
67a4f2b7 AO |
4775 | |
4776 | case DT_TLSDESC_PLT: | |
6de2ae4a | 4777 | s = htab->elf.splt; |
67a4f2b7 AO |
4778 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
4779 | + htab->tlsdesc_plt; | |
4780 | break; | |
4781 | ||
4782 | case DT_TLSDESC_GOT: | |
6de2ae4a | 4783 | s = htab->elf.sgot; |
67a4f2b7 AO |
4784 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
4785 | + htab->tlsdesc_got; | |
4786 | break; | |
70256ad8 | 4787 | } |
c434dee6 | 4788 | |
82e96e07 | 4789 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
4790 | } |
4791 | ||
c434dee6 | 4792 | /* Fill in the special first entry in the procedure linkage table. */ |
6de2ae4a | 4793 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 4794 | { |
653165cc | 4795 | /* Fill in the first entry in the procedure linkage table. */ |
eed180f8 RM |
4796 | memcpy (htab->elf.splt->contents, |
4797 | abed->plt0_entry, abed->plt_entry_size); | |
653165cc AJ |
4798 | /* Add offset for pushq GOT+8(%rip), since the instruction |
4799 | uses 6 bytes subtract this value. */ | |
4800 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4801 | (htab->elf.sgotplt->output_section->vma |
4802 | + htab->elf.sgotplt->output_offset | |
653165cc | 4803 | + 8 |
6de2ae4a L |
4804 | - htab->elf.splt->output_section->vma |
4805 | - htab->elf.splt->output_offset | |
653165cc | 4806 | - 6), |
eed180f8 RM |
4807 | htab->elf.splt->contents + abed->plt0_got1_offset); |
4808 | /* Add offset for the PC-relative instruction accessing GOT+16, | |
4809 | subtracting the offset to the end of that instruction. */ | |
653165cc | 4810 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4811 | (htab->elf.sgotplt->output_section->vma |
4812 | + htab->elf.sgotplt->output_offset | |
653165cc | 4813 | + 16 |
6de2ae4a L |
4814 | - htab->elf.splt->output_section->vma |
4815 | - htab->elf.splt->output_offset | |
eed180f8 RM |
4816 | - abed->plt0_got2_insn_end), |
4817 | htab->elf.splt->contents + abed->plt0_got2_offset); | |
653165cc | 4818 | |
eed180f8 RM |
4819 | elf_section_data (htab->elf.splt->output_section) |
4820 | ->this_hdr.sh_entsize = abed->plt_entry_size; | |
67a4f2b7 AO |
4821 | |
4822 | if (htab->tlsdesc_plt) | |
4823 | { | |
4824 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6de2ae4a | 4825 | htab->elf.sgot->contents + htab->tlsdesc_got); |
67a4f2b7 | 4826 | |
6de2ae4a | 4827 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, |
eed180f8 | 4828 | abed->plt0_entry, abed->plt_entry_size); |
67a4f2b7 AO |
4829 | |
4830 | /* Add offset for pushq GOT+8(%rip), since the | |
4831 | instruction uses 6 bytes subtract this value. */ | |
4832 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4833 | (htab->elf.sgotplt->output_section->vma |
4834 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 4835 | + 8 |
6de2ae4a L |
4836 | - htab->elf.splt->output_section->vma |
4837 | - htab->elf.splt->output_offset | |
67a4f2b7 AO |
4838 | - htab->tlsdesc_plt |
4839 | - 6), | |
eed180f8 RM |
4840 | htab->elf.splt->contents |
4841 | + htab->tlsdesc_plt + abed->plt0_got1_offset); | |
4842 | /* Add offset for the PC-relative instruction accessing GOT+TDG, | |
4843 | where TGD stands for htab->tlsdesc_got, subtracting the offset | |
4844 | to the end of that instruction. */ | |
67a4f2b7 | 4845 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4846 | (htab->elf.sgot->output_section->vma |
4847 | + htab->elf.sgot->output_offset | |
67a4f2b7 | 4848 | + htab->tlsdesc_got |
6de2ae4a L |
4849 | - htab->elf.splt->output_section->vma |
4850 | - htab->elf.splt->output_offset | |
67a4f2b7 | 4851 | - htab->tlsdesc_plt |
eed180f8 RM |
4852 | - abed->plt0_got2_insn_end), |
4853 | htab->elf.splt->contents | |
4854 | + htab->tlsdesc_plt + abed->plt0_got2_offset); | |
67a4f2b7 | 4855 | } |
70256ad8 | 4856 | } |
70256ad8 AJ |
4857 | } |
4858 | ||
6de2ae4a | 4859 | if (htab->elf.sgotplt) |
70256ad8 | 4860 | { |
56d4289c L |
4861 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
4862 | { | |
4863 | (*_bfd_error_handler) | |
4864 | (_("discarded output section: `%A'"), htab->elf.sgotplt); | |
4865 | return FALSE; | |
4866 | } | |
4867 | ||
c434dee6 | 4868 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 4869 | if (htab->elf.sgotplt->size > 0) |
c434dee6 AJ |
4870 | { |
4871 | /* Set the first entry in the global offset table to the address of | |
4872 | the dynamic section. */ | |
4873 | if (sdyn == NULL) | |
6de2ae4a | 4874 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); |
c434dee6 AJ |
4875 | else |
4876 | bfd_put_64 (output_bfd, | |
4877 | sdyn->output_section->vma + sdyn->output_offset, | |
6de2ae4a | 4878 | htab->elf.sgotplt->contents); |
c434dee6 | 4879 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
6de2ae4a L |
4880 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); |
4881 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
c434dee6 | 4882 | } |
70256ad8 | 4883 | |
6de2ae4a | 4884 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = |
c434dee6 AJ |
4885 | GOT_ENTRY_SIZE; |
4886 | } | |
70256ad8 | 4887 | |
e41b3a13 | 4888 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
4889 | if (htab->plt_eh_frame != NULL |
4890 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
4891 | { |
4892 | if (htab->elf.splt != NULL | |
4893 | && htab->elf.splt->size != 0 | |
4894 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
4895 | && htab->elf.splt->output_section != NULL | |
4896 | && htab->plt_eh_frame->output_section != NULL) | |
4897 | { | |
4898 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
4899 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
4900 | + htab->plt_eh_frame->output_offset | |
4901 | + PLT_FDE_START_OFFSET; | |
4902 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
4903 | htab->plt_eh_frame->contents | |
4904 | + PLT_FDE_START_OFFSET); | |
4905 | } | |
dbaa2011 | 4906 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
4907 | { |
4908 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
4909 | htab->plt_eh_frame, | |
4910 | htab->plt_eh_frame->contents)) | |
4911 | return FALSE; | |
4912 | } | |
4913 | } | |
4914 | ||
6de2ae4a L |
4915 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
4916 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
4917 | = GOT_ENTRY_SIZE; |
4918 | ||
c25bc9fc L |
4919 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
4920 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 4921 | elf_x86_64_finish_local_dynamic_symbol, |
c25bc9fc L |
4922 | info); |
4923 | ||
b34976b6 | 4924 | return TRUE; |
8d88c4ca NC |
4925 | } |
4926 | ||
4c45e5c9 JJ |
4927 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
4928 | or (bfd_vma) -1 if it should not be included. */ | |
4929 | ||
4930 | static bfd_vma | |
351f65ca L |
4931 | elf_x86_64_plt_sym_val (bfd_vma i, const asection *plt, |
4932 | const arelent *rel ATTRIBUTE_UNUSED) | |
4c45e5c9 | 4933 | { |
eed180f8 | 4934 | return plt->vma + (i + 1) * GET_PLT_ENTRY_SIZE (plt->owner); |
4c45e5c9 | 4935 | } |
8df9fc9d | 4936 | |
d2b2c203 DJ |
4937 | /* Handle an x86-64 specific section when reading an object file. This |
4938 | is called when elfcode.h finds a section with an unknown type. */ | |
4939 | ||
4940 | static bfd_boolean | |
351f65ca | 4941 | elf_x86_64_section_from_shdr (bfd *abfd, |
6dc132d9 L |
4942 | Elf_Internal_Shdr *hdr, |
4943 | const char *name, | |
4944 | int shindex) | |
d2b2c203 DJ |
4945 | { |
4946 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
4947 | return FALSE; | |
4948 | ||
6dc132d9 | 4949 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
4950 | return FALSE; |
4951 | ||
4952 | return TRUE; | |
4953 | } | |
4954 | ||
3b22753a L |
4955 | /* Hook called by the linker routine which adds symbols from an object |
4956 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
4957 | of .bss. */ | |
4958 | ||
4959 | static bfd_boolean | |
351f65ca L |
4960 | elf_x86_64_add_symbol_hook (bfd *abfd, |
4961 | struct bfd_link_info *info, | |
4962 | Elf_Internal_Sym *sym, | |
4963 | const char **namep ATTRIBUTE_UNUSED, | |
4964 | flagword *flagsp ATTRIBUTE_UNUSED, | |
4965 | asection **secp, | |
4966 | bfd_vma *valp) | |
3b22753a L |
4967 | { |
4968 | asection *lcomm; | |
4969 | ||
4970 | switch (sym->st_shndx) | |
4971 | { | |
4972 | case SHN_X86_64_LCOMMON: | |
4973 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
4974 | if (lcomm == NULL) | |
4975 | { | |
4976 | lcomm = bfd_make_section_with_flags (abfd, | |
4977 | "LARGE_COMMON", | |
4978 | (SEC_ALLOC | |
4979 | | SEC_IS_COMMON | |
4980 | | SEC_LINKER_CREATED)); | |
4981 | if (lcomm == NULL) | |
4982 | return FALSE; | |
4983 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
4984 | } | |
4985 | *secp = lcomm; | |
4986 | *valp = sym->st_size; | |
c35bdf6e | 4987 | return TRUE; |
3b22753a | 4988 | } |
d8045f23 | 4989 | |
c16153ae | 4990 | if ((abfd->flags & DYNAMIC) == 0 |
f64b2e8d NC |
4991 | && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
4992 | || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)) | |
4993 | elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE; | |
d8045f23 | 4994 | |
3b22753a L |
4995 | return TRUE; |
4996 | } | |
4997 | ||
4998 | ||
4999 | /* Given a BFD section, try to locate the corresponding ELF section | |
5000 | index. */ | |
5001 | ||
5002 | static bfd_boolean | |
351f65ca L |
5003 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
5004 | asection *sec, int *index_return) | |
3b22753a L |
5005 | { |
5006 | if (sec == &_bfd_elf_large_com_section) | |
5007 | { | |
91d6fa6a | 5008 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
5009 | return TRUE; |
5010 | } | |
5011 | return FALSE; | |
5012 | } | |
5013 | ||
5014 | /* Process a symbol. */ | |
5015 | ||
5016 | static void | |
351f65ca L |
5017 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
5018 | asymbol *asym) | |
3b22753a L |
5019 | { |
5020 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
5021 | ||
5022 | switch (elfsym->internal_elf_sym.st_shndx) | |
5023 | { | |
5024 | case SHN_X86_64_LCOMMON: | |
5025 | asym->section = &_bfd_elf_large_com_section; | |
5026 | asym->value = elfsym->internal_elf_sym.st_size; | |
5027 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
5028 | asym->flags &= ~BSF_GLOBAL; | |
5029 | break; | |
5030 | } | |
5031 | } | |
5032 | ||
5033 | static bfd_boolean | |
351f65ca | 5034 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
5035 | { |
5036 | return (sym->st_shndx == SHN_COMMON | |
5037 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
5038 | } | |
5039 | ||
5040 | static unsigned int | |
351f65ca | 5041 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
5042 | { |
5043 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
5044 | return SHN_COMMON; | |
5045 | else | |
5046 | return SHN_X86_64_LCOMMON; | |
5047 | } | |
5048 | ||
5049 | static asection * | |
351f65ca | 5050 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
5051 | { |
5052 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
5053 | return bfd_com_section_ptr; | |
5054 | else | |
5055 | return &_bfd_elf_large_com_section; | |
5056 | } | |
5057 | ||
5058 | static bfd_boolean | |
351f65ca L |
5059 | elf_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
5060 | struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED, | |
5061 | struct elf_link_hash_entry *h, | |
5062 | Elf_Internal_Sym *sym, | |
5063 | asection **psec, | |
5064 | bfd_vma *pvalue ATTRIBUTE_UNUSED, | |
5065 | unsigned int *pold_alignment ATTRIBUTE_UNUSED, | |
5066 | bfd_boolean *skip ATTRIBUTE_UNUSED, | |
5067 | bfd_boolean *override ATTRIBUTE_UNUSED, | |
5068 | bfd_boolean *type_change_ok ATTRIBUTE_UNUSED, | |
5069 | bfd_boolean *size_change_ok ATTRIBUTE_UNUSED, | |
71e7aa7d L |
5070 | bfd_boolean *newdyn ATTRIBUTE_UNUSED, |
5071 | bfd_boolean *newdef, | |
351f65ca L |
5072 | bfd_boolean *newdyncommon ATTRIBUTE_UNUSED, |
5073 | bfd_boolean *newweak ATTRIBUTE_UNUSED, | |
5074 | bfd *abfd ATTRIBUTE_UNUSED, | |
5075 | asection **sec, | |
71e7aa7d L |
5076 | bfd_boolean *olddyn ATTRIBUTE_UNUSED, |
5077 | bfd_boolean *olddef, | |
351f65ca L |
5078 | bfd_boolean *olddyncommon ATTRIBUTE_UNUSED, |
5079 | bfd_boolean *oldweak ATTRIBUTE_UNUSED, | |
5080 | bfd *oldbfd, | |
5081 | asection **oldsec) | |
3b22753a L |
5082 | { |
5083 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
5084 | normal common symbol. We turn the large common symbol into a |
5085 | normal one. */ | |
71e7aa7d | 5086 | if (!*olddef |
3b22753a | 5087 | && h->root.type == bfd_link_hash_common |
71e7aa7d | 5088 | && !*newdef |
3b22753a | 5089 | && bfd_is_com_section (*sec) |
00492999 | 5090 | && *oldsec != *sec) |
3b22753a | 5091 | { |
00492999 L |
5092 | if (sym->st_shndx == SHN_COMMON |
5093 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0) | |
5094 | { | |
5095 | h->root.u.c.p->section | |
5096 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
5097 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
5098 | } | |
5099 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
5100 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0) | |
9a2e389a | 5101 | *psec = *sec = bfd_com_section_ptr; |
3b22753a L |
5102 | } |
5103 | ||
5104 | return TRUE; | |
5105 | } | |
5106 | ||
5107 | static int | |
351f65ca L |
5108 | elf_x86_64_additional_program_headers (bfd *abfd, |
5109 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
5110 | { |
5111 | asection *s; | |
9a2e389a | 5112 | int count = 0; |
3b22753a L |
5113 | |
5114 | /* Check to see if we need a large readonly segment. */ | |
5115 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
5116 | if (s && (s->flags & SEC_LOAD)) | |
5117 | count++; | |
5118 | ||
5119 | /* Check to see if we need a large data segment. Since .lbss sections | |
5120 | is placed right after the .bss section, there should be no need for | |
5121 | a large data segment just because of .lbss. */ | |
5122 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
5123 | if (s && (s->flags & SEC_LOAD)) | |
5124 | count++; | |
5125 | ||
5126 | return count; | |
5127 | } | |
5128 | ||
fdc90cb4 JJ |
5129 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
5130 | ||
5131 | static bfd_boolean | |
351f65ca | 5132 | elf_x86_64_hash_symbol (struct elf_link_hash_entry *h) |
fdc90cb4 JJ |
5133 | { |
5134 | if (h->plt.offset != (bfd_vma) -1 | |
5135 | && !h->def_regular | |
5136 | && !h->pointer_equality_needed) | |
5137 | return FALSE; | |
5138 | ||
5139 | return _bfd_elf_hash_symbol (h); | |
5140 | } | |
5141 | ||
c543bf9a L |
5142 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
5143 | ||
5144 | static bfd_boolean | |
5145 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
5146 | const bfd_target *output) | |
5147 | { | |
5148 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
5149 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
5150 | && _bfd_elf_relocs_compatible (input, output)); | |
5151 | } | |
5152 | ||
9a2e389a | 5153 | static const struct bfd_elf_special_section |
351f65ca | 5154 | elf_x86_64_special_sections[]= |
3b22753a | 5155 | { |
0112cd26 NC |
5156 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
5157 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
5158 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
5159 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
5160 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
5161 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
5162 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
5163 | }; |
5164 | ||
70256ad8 AJ |
5165 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec |
5166 | #define TARGET_LITTLE_NAME "elf64-x86-64" | |
5167 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 5168 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 5169 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 5170 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 5171 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 5172 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
5173 | |
5174 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 5175 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
5176 | #define elf_backend_want_got_plt 1 |
5177 | #define elf_backend_plt_readonly 1 | |
5178 | #define elf_backend_want_plt_sym 0 | |
5179 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 5180 | #define elf_backend_rela_normal 1 |
e41b3a13 | 5181 | #define elf_backend_plt_alignment 4 |
70256ad8 | 5182 | |
351f65ca | 5183 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 5184 | |
70256ad8 | 5185 | #define bfd_elf64_bfd_link_hash_table_create \ |
351f65ca | 5186 | elf_x86_64_link_hash_table_create |
c25bc9fc | 5187 | #define bfd_elf64_bfd_link_hash_table_free \ |
351f65ca L |
5188 | elf_x86_64_link_hash_table_free |
5189 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup | |
157090f7 | 5190 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 5191 | elf_x86_64_reloc_name_lookup |
70256ad8 | 5192 | |
351f65ca | 5193 | #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol |
c543bf9a | 5194 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca L |
5195 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
5196 | #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol | |
5197 | #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections | |
5198 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections | |
5199 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
5200 | #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook | |
5201 | #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook | |
5202 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus | |
5203 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
8fd79e71 L |
5204 | #ifdef CORE_HEADER |
5205 | #define elf_backend_write_core_note elf_x86_64_write_core_note | |
5206 | #endif | |
351f65ca L |
5207 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class |
5208 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
5209 | #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections | |
5210 | #define elf_backend_always_size_sections elf_x86_64_always_size_sections | |
74541ad4 | 5211 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
351f65ca | 5212 | #define elf_backend_plt_sym_val elf_x86_64_plt_sym_val |
407443a3 | 5213 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
351f65ca | 5214 | #define bfd_elf64_mkobject elf_x86_64_mkobject |
8d88c4ca | 5215 | |
d2b2c203 | 5216 | #define elf_backend_section_from_shdr \ |
351f65ca | 5217 | elf_x86_64_section_from_shdr |
d2b2c203 | 5218 | |
3b22753a | 5219 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 5220 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 5221 | #define elf_backend_add_symbol_hook \ |
351f65ca | 5222 | elf_x86_64_add_symbol_hook |
3b22753a | 5223 | #define elf_backend_symbol_processing \ |
351f65ca | 5224 | elf_x86_64_symbol_processing |
3b22753a | 5225 | #define elf_backend_common_section_index \ |
351f65ca | 5226 | elf_x86_64_common_section_index |
3b22753a | 5227 | #define elf_backend_common_section \ |
351f65ca | 5228 | elf_x86_64_common_section |
3b22753a | 5229 | #define elf_backend_common_definition \ |
351f65ca | 5230 | elf_x86_64_common_definition |
3b22753a | 5231 | #define elf_backend_merge_symbol \ |
351f65ca | 5232 | elf_x86_64_merge_symbol |
3b22753a | 5233 | #define elf_backend_special_sections \ |
351f65ca | 5234 | elf_x86_64_special_sections |
3b22753a | 5235 | #define elf_backend_additional_program_headers \ |
351f65ca | 5236 | elf_x86_64_additional_program_headers |
fdc90cb4 | 5237 | #define elf_backend_hash_symbol \ |
351f65ca | 5238 | elf_x86_64_hash_symbol |
3b22753a | 5239 | |
d8045f23 NC |
5240 | #define elf_backend_post_process_headers _bfd_elf_set_osabi |
5241 | ||
8d88c4ca | 5242 | #include "elf64-target.h" |
9d7cbccd NC |
5243 | |
5244 | /* FreeBSD support. */ | |
5245 | ||
5246 | #undef TARGET_LITTLE_SYM | |
5247 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec | |
5248 | #undef TARGET_LITTLE_NAME | |
5249 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
5250 | ||
d1036acb L |
5251 | #undef ELF_OSABI |
5252 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 5253 | |
9d7cbccd NC |
5254 | #undef elf64_bed |
5255 | #define elf64_bed elf64_x86_64_fbsd_bed | |
5256 | ||
5257 | #include "elf64-target.h" | |
8a9036a4 | 5258 | |
a6cc6b3b RO |
5259 | /* Solaris 2 support. */ |
5260 | ||
5261 | #undef TARGET_LITTLE_SYM | |
5262 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec | |
5263 | #undef TARGET_LITTLE_NAME | |
5264 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
5265 | ||
5266 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
5267 | objects won't be recognized. */ | |
5268 | #undef ELF_OSABI | |
5269 | ||
5270 | #undef elf64_bed | |
5271 | #define elf64_bed elf64_x86_64_sol2_bed | |
5272 | ||
7dc98aea RO |
5273 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
5274 | boundary. */ | |
5275 | #undef elf_backend_static_tls_alignment | |
5276 | #define elf_backend_static_tls_alignment 16 | |
5277 | ||
a6cc6b3b RO |
5278 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
5279 | ||
5280 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
5281 | File, p.63. */ | |
5282 | #undef elf_backend_want_plt_sym | |
5283 | #define elf_backend_want_plt_sym 1 | |
5284 | ||
5285 | #include "elf64-target.h" | |
5286 | ||
8059fb19 RM |
5287 | /* Native Client support. */ |
5288 | ||
5289 | #undef TARGET_LITTLE_SYM | |
5290 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_nacl_vec | |
5291 | #undef TARGET_LITTLE_NAME | |
5292 | #define TARGET_LITTLE_NAME "elf64-x86-64-nacl" | |
5293 | #undef elf64_bed | |
5294 | #define elf64_bed elf64_x86_64_nacl_bed | |
5295 | ||
5296 | #undef ELF_MAXPAGESIZE | |
5297 | #undef ELF_MINPAGESIZE | |
5298 | #undef ELF_COMMONPAGESIZE | |
5299 | #define ELF_MAXPAGESIZE 0x10000 | |
5300 | #define ELF_MINPAGESIZE 0x10000 | |
5301 | #define ELF_COMMONPAGESIZE 0x10000 | |
5302 | ||
5303 | /* Restore defaults. */ | |
5304 | #undef ELF_OSABI | |
5305 | #undef elf_backend_static_tls_alignment | |
5306 | #undef elf_backend_want_plt_sym | |
5307 | #define elf_backend_want_plt_sym 0 | |
5308 | ||
5309 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
5310 | ||
5311 | #undef elf_backend_plt_alignment | |
5312 | #define elf_backend_plt_alignment 5 | |
5313 | #define NACL_PLT_ENTRY_SIZE 64 | |
5314 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
5315 | ||
5316 | static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] = | |
5317 | { | |
5318 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ | |
5319 | 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */ | |
5320 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
5321 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5322 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
5323 | ||
ea2d813e RM |
5324 | /* 9-byte nop sequence to pad out to the next 32-byte boundary. */ |
5325 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopl %cs:0x0(%rax,%rax,1) */ | |
5326 | ||
5327 | /* 32 bytes of nop to pad out to the standard size. */ | |
8059fb19 RM |
5328 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ |
5329 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
5330 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
5331 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
ea2d813e RM |
5332 | 0x66, /* excess data32 prefix */ |
5333 | 0x90 /* nop */ | |
8059fb19 RM |
5334 | }; |
5335 | ||
5336 | static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
5337 | { | |
5338 | 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */ | |
5339 | 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */ | |
5340 | 0x4d, 0x01, 0xfb, /* add %r15, %r11 */ | |
5341 | 0x41, 0xff, 0xe3, /* jmpq *%r11 */ | |
5342 | ||
5343 | /* 15-byte nop sequence to pad out to the next 32-byte boundary. */ | |
5344 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
5345 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
5346 | ||
5347 | /* Lazy GOT entries point here (32-byte aligned). */ | |
5348 | 0x68, /* pushq immediate */ | |
5349 | 0, 0, 0, 0, /* replaced with index into relocation table. */ | |
5350 | 0xe9, /* jmp relative */ | |
5351 | 0, 0, 0, 0, /* replaced with offset to start of .plt0. */ | |
5352 | ||
5353 | /* 22 bytes of nop to pad out to the standard size. */ | |
5354 | 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */ | |
5355 | 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */ | |
5356 | 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */ | |
5357 | }; | |
5358 | ||
5359 | /* .eh_frame covering the .plt section. */ | |
5360 | ||
5361 | static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] = | |
5362 | { | |
5363 | #if (PLT_CIE_LENGTH != 20 \ | |
5364 | || PLT_FDE_LENGTH != 36 \ | |
5365 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
5366 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
5367 | # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!" | |
5368 | #endif | |
5369 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
5370 | 0, 0, 0, 0, /* CIE ID */ | |
5371 | 1, /* CIE version */ | |
5372 | 'z', 'R', 0, /* Augmentation string */ | |
5373 | 1, /* Code alignment factor */ | |
5374 | 0x78, /* Data alignment factor */ | |
5375 | 16, /* Return address column */ | |
5376 | 1, /* Augmentation size */ | |
5377 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
5378 | DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */ | |
5379 | DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */ | |
5380 | DW_CFA_nop, DW_CFA_nop, | |
5381 | ||
5382 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
5383 | PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */ | |
5384 | 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */ | |
5385 | 0, 0, 0, 0, /* .plt size goes here */ | |
5386 | 0, /* Augmentation size */ | |
5387 | DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */ | |
5388 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
5389 | DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */ | |
5390 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
5391 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
5392 | 13, /* Block length */ | |
5393 | DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */ | |
5394 | DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */ | |
5395 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
5396 | DW_OP_lit3, DW_OP_shl, DW_OP_plus, | |
5397 | DW_CFA_nop, DW_CFA_nop | |
5398 | }; | |
5399 | ||
5400 | static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed = | |
5401 | { | |
5402 | elf_x86_64_nacl_plt0_entry, /* plt0_entry */ | |
5403 | elf_x86_64_nacl_plt_entry, /* plt_entry */ | |
5404 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
5405 | 2, /* plt0_got1_offset */ | |
5406 | 9, /* plt0_got2_offset */ | |
5407 | 13, /* plt0_got2_insn_end */ | |
5408 | 3, /* plt_got_offset */ | |
5409 | 33, /* plt_reloc_offset */ | |
5410 | 38, /* plt_plt_offset */ | |
5411 | 7, /* plt_got_insn_size */ | |
5412 | 42, /* plt_plt_insn_end */ | |
5413 | 32, /* plt_lazy_offset */ | |
5414 | elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */ | |
5415 | sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */ | |
5416 | }; | |
5417 | ||
5418 | #undef elf_backend_arch_data | |
5419 | #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed | |
5420 | ||
5a68afcf RM |
5421 | #undef elf_backend_modify_segment_map |
5422 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
5423 | #undef elf_backend_modify_program_headers | |
5424 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
5425 | ||
8059fb19 RM |
5426 | #include "elf64-target.h" |
5427 | ||
5428 | /* Native Client x32 support. */ | |
5429 | ||
5430 | #undef TARGET_LITTLE_SYM | |
5431 | #define TARGET_LITTLE_SYM bfd_elf32_x86_64_nacl_vec | |
5432 | #undef TARGET_LITTLE_NAME | |
5433 | #define TARGET_LITTLE_NAME "elf32-x86-64-nacl" | |
5434 | #undef elf32_bed | |
5435 | #define elf32_bed elf32_x86_64_nacl_bed | |
5436 | ||
5437 | #define bfd_elf32_bfd_link_hash_table_create \ | |
5438 | elf_x86_64_link_hash_table_create | |
5439 | #define bfd_elf32_bfd_link_hash_table_free \ | |
5440 | elf_x86_64_link_hash_table_free | |
5441 | #define bfd_elf32_bfd_reloc_type_lookup \ | |
5442 | elf_x86_64_reloc_type_lookup | |
5443 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
5444 | elf_x86_64_reloc_name_lookup | |
5445 | #define bfd_elf32_mkobject \ | |
5446 | elf_x86_64_mkobject | |
5447 | ||
5448 | #undef elf_backend_object_p | |
5449 | #define elf_backend_object_p \ | |
5450 | elf32_x86_64_elf_object_p | |
5451 | ||
5452 | #undef elf_backend_bfd_from_remote_memory | |
5453 | #define elf_backend_bfd_from_remote_memory \ | |
5454 | _bfd_elf32_bfd_from_remote_memory | |
5455 | ||
5456 | #undef elf_backend_size_info | |
5457 | #define elf_backend_size_info \ | |
5458 | _bfd_elf32_size_info | |
5459 | ||
5460 | #include "elf32-target.h" | |
5461 | ||
5462 | /* Restore defaults. */ | |
5a68afcf | 5463 | #undef elf_backend_object_p |
8059fb19 | 5464 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
5a68afcf RM |
5465 | #undef elf_backend_bfd_from_remote_memory |
5466 | #undef elf_backend_size_info | |
5467 | #undef elf_backend_modify_segment_map | |
5468 | #undef elf_backend_modify_program_headers | |
8059fb19 | 5469 | |
8a9036a4 L |
5470 | /* Intel L1OM support. */ |
5471 | ||
5472 | static bfd_boolean | |
5473 | elf64_l1om_elf_object_p (bfd *abfd) | |
5474 | { | |
5475 | /* Set the right machine number for an L1OM elf64 file. */ | |
5476 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
5477 | return TRUE; | |
5478 | } | |
5479 | ||
5480 | #undef TARGET_LITTLE_SYM | |
5481 | #define TARGET_LITTLE_SYM bfd_elf64_l1om_vec | |
5482 | #undef TARGET_LITTLE_NAME | |
5483 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
5484 | #undef ELF_ARCH | |
5485 | #define ELF_ARCH bfd_arch_l1om | |
5486 | ||
5487 | #undef ELF_MACHINE_CODE | |
5488 | #define ELF_MACHINE_CODE EM_L1OM | |
5489 | ||
5490 | #undef ELF_OSABI | |
5491 | ||
5492 | #undef elf64_bed | |
5493 | #define elf64_bed elf64_l1om_bed | |
5494 | ||
5495 | #undef elf_backend_object_p | |
5496 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
5497 | ||
8059fb19 RM |
5498 | /* Restore defaults. */ |
5499 | #undef ELF_MAXPAGESIZE | |
5500 | #undef ELF_MINPAGESIZE | |
5501 | #undef ELF_COMMONPAGESIZE | |
5502 | #define ELF_MAXPAGESIZE 0x200000 | |
5503 | #define ELF_MINPAGESIZE 0x1000 | |
5504 | #define ELF_COMMONPAGESIZE 0x1000 | |
5505 | #undef elf_backend_plt_alignment | |
5506 | #define elf_backend_plt_alignment 4 | |
5507 | #undef elf_backend_arch_data | |
5508 | #define elf_backend_arch_data &elf_x86_64_arch_bed | |
1a0c107f | 5509 | |
8a9036a4 L |
5510 | #include "elf64-target.h" |
5511 | ||
5512 | /* FreeBSD L1OM support. */ | |
5513 | ||
5514 | #undef TARGET_LITTLE_SYM | |
5515 | #define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec | |
5516 | #undef TARGET_LITTLE_NAME | |
5517 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
5518 | ||
5519 | #undef ELF_OSABI | |
5520 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5521 | ||
5522 | #undef elf64_bed | |
5523 | #define elf64_bed elf64_l1om_fbsd_bed | |
5524 | ||
8a9036a4 | 5525 | #include "elf64-target.h" |
351f65ca | 5526 | |
7a9068fe L |
5527 | /* Intel K1OM support. */ |
5528 | ||
5529 | static bfd_boolean | |
5530 | elf64_k1om_elf_object_p (bfd *abfd) | |
5531 | { | |
5532 | /* Set the right machine number for an K1OM elf64 file. */ | |
5533 | bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om); | |
5534 | return TRUE; | |
5535 | } | |
5536 | ||
5537 | #undef TARGET_LITTLE_SYM | |
5538 | #define TARGET_LITTLE_SYM bfd_elf64_k1om_vec | |
5539 | #undef TARGET_LITTLE_NAME | |
5540 | #define TARGET_LITTLE_NAME "elf64-k1om" | |
5541 | #undef ELF_ARCH | |
5542 | #define ELF_ARCH bfd_arch_k1om | |
5543 | ||
5544 | #undef ELF_MACHINE_CODE | |
5545 | #define ELF_MACHINE_CODE EM_K1OM | |
5546 | ||
5547 | #undef ELF_OSABI | |
5548 | ||
5549 | #undef elf64_bed | |
5550 | #define elf64_bed elf64_k1om_bed | |
5551 | ||
5552 | #undef elf_backend_object_p | |
5553 | #define elf_backend_object_p elf64_k1om_elf_object_p | |
5554 | ||
5555 | #undef elf_backend_static_tls_alignment | |
5556 | ||
5557 | #undef elf_backend_want_plt_sym | |
5558 | #define elf_backend_want_plt_sym 0 | |
5559 | ||
5560 | #include "elf64-target.h" | |
5561 | ||
5562 | /* FreeBSD K1OM support. */ | |
5563 | ||
5564 | #undef TARGET_LITTLE_SYM | |
5565 | #define TARGET_LITTLE_SYM bfd_elf64_k1om_freebsd_vec | |
5566 | #undef TARGET_LITTLE_NAME | |
5567 | #define TARGET_LITTLE_NAME "elf64-k1om-freebsd" | |
5568 | ||
5569 | #undef ELF_OSABI | |
5570 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5571 | ||
5572 | #undef elf64_bed | |
5573 | #define elf64_bed elf64_k1om_fbsd_bed | |
5574 | ||
5575 | #include "elf64-target.h" | |
5576 | ||
351f65ca L |
5577 | /* 32bit x86-64 support. */ |
5578 | ||
351f65ca L |
5579 | #undef TARGET_LITTLE_SYM |
5580 | #define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec | |
5581 | #undef TARGET_LITTLE_NAME | |
5582 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
8059fb19 | 5583 | #undef elf32_bed |
351f65ca L |
5584 | |
5585 | #undef ELF_ARCH | |
5586 | #define ELF_ARCH bfd_arch_i386 | |
5587 | ||
5588 | #undef ELF_MACHINE_CODE | |
5589 | #define ELF_MACHINE_CODE EM_X86_64 | |
5590 | ||
351f65ca L |
5591 | #undef ELF_OSABI |
5592 | ||
351f65ca L |
5593 | #undef elf_backend_object_p |
5594 | #define elf_backend_object_p \ | |
5595 | elf32_x86_64_elf_object_p | |
5596 | ||
5597 | #undef elf_backend_bfd_from_remote_memory | |
5598 | #define elf_backend_bfd_from_remote_memory \ | |
5599 | _bfd_elf32_bfd_from_remote_memory | |
5600 | ||
5601 | #undef elf_backend_size_info | |
5602 | #define elf_backend_size_info \ | |
5603 | _bfd_elf32_size_info | |
5604 | ||
5605 | #include "elf32-target.h" |