Commit | Line | Data |
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8d88c4ca | 1 | /* X86-64 specific support for 64-bit ELF |
4dfe6ac6 NC |
2 | Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, |
3 | 2010 Free Software Foundation, Inc. | |
8d88c4ca NC |
4 | Contributed by Jan Hubicka <jh@suse.cz>. |
5 | ||
ae9a127f | 6 | This file is part of BFD, the Binary File Descriptor library. |
8d88c4ca | 7 | |
ae9a127f NC |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 10 | the Free Software Foundation; either version 3 of the License, or |
ae9a127f | 11 | (at your option) any later version. |
8d88c4ca | 12 | |
ae9a127f NC |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
8d88c4ca | 17 | |
ae9a127f NC |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
21 | MA 02110-1301, USA. */ | |
8d88c4ca | 22 | |
8d88c4ca | 23 | #include "sysdep.h" |
3db64b00 | 24 | #include "bfd.h" |
c434dee6 | 25 | #include "bfdlink.h" |
8d88c4ca NC |
26 | #include "libbfd.h" |
27 | #include "elf-bfd.h" | |
142411ca | 28 | #include "bfd_stdint.h" |
c25bc9fc L |
29 | #include "objalloc.h" |
30 | #include "hashtab.h" | |
8d88c4ca NC |
31 | |
32 | #include "elf/x86-64.h" | |
33 | ||
8d88c4ca NC |
34 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
35 | #define MINUS_ONE (~ (bfd_vma) 0) | |
36 | ||
37 | /* The relocation "howto" table. Order of fields: | |
7b81dfbb AJ |
38 | type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow, |
39 | special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */ | |
70256ad8 AJ |
40 | static reloc_howto_type x86_64_elf_howto_table[] = |
41 | { | |
b34976b6 AM |
42 | HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
43 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, | |
44 | FALSE), | |
45 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
46 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, | |
47 | FALSE), | |
48 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
49 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, | |
50 | TRUE), | |
51 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
52 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, | |
53 | FALSE), | |
54 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
55 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, | |
56 | TRUE), | |
57 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
58 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, | |
59 | FALSE), | |
60 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
61 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, | |
62 | MINUS_ONE, FALSE), | |
63 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
64 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, | |
65 | MINUS_ONE, FALSE), | |
66 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
67 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, | |
68 | MINUS_ONE, FALSE), | |
69 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
70 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, | |
71 | 0xffffffff, TRUE), | |
72 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, | |
73 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
74 | FALSE), | |
75 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
76 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, | |
77 | FALSE), | |
78 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
79 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), | |
b0360d8c | 80 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
b34976b6 | 81 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), |
ac2aa337 | 82 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
b34976b6 AM |
83 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), |
84 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
85 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), | |
86 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
87 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, | |
88 | MINUS_ONE, FALSE), | |
89 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
90 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, | |
91 | MINUS_ONE, FALSE), | |
92 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
93 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, | |
94 | MINUS_ONE, FALSE), | |
95 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
96 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, | |
97 | 0xffffffff, TRUE), | |
98 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
99 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, | |
100 | 0xffffffff, TRUE), | |
ac2aa337 | 101 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
b34976b6 AM |
102 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, |
103 | 0xffffffff, FALSE), | |
104 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
105 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, | |
106 | 0xffffffff, TRUE), | |
107 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
108 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, | |
109 | 0xffffffff, FALSE), | |
d6ab8113 JB |
110 | HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
111 | bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE, | |
112 | TRUE), | |
113 | HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
114 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", | |
115 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
116 | HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
117 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", | |
118 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
7b81dfbb AJ |
119 | HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, |
120 | bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE, | |
121 | FALSE), | |
122 | HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
123 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE, | |
124 | MINUS_ONE, TRUE), | |
125 | HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
126 | bfd_elf_generic_reloc, "R_X86_64_GOTPC64", | |
127 | FALSE, MINUS_ONE, MINUS_ONE, TRUE), | |
128 | HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
129 | bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE, | |
130 | MINUS_ONE, FALSE), | |
131 | HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
132 | bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE, | |
133 | MINUS_ONE, FALSE), | |
67a4f2b7 AO |
134 | EMPTY_HOWTO (32), |
135 | EMPTY_HOWTO (33), | |
136 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0, | |
137 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
138 | "R_X86_64_GOTPC32_TLSDESC", | |
139 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
140 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0, | |
141 | complain_overflow_dont, bfd_elf_generic_reloc, | |
142 | "R_X86_64_TLSDESC_CALL", | |
143 | FALSE, 0, 0, FALSE), | |
144 | HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0, | |
145 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
146 | "R_X86_64_TLSDESC", | |
147 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
cbe950e9 L |
148 | HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
149 | bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE, | |
150 | MINUS_ONE, FALSE), | |
fe4770f4 | 151 | |
a33d77bc JB |
152 | /* We have a gap in the reloc numbers here. |
153 | R_X86_64_standard counts the number up to this point, and | |
154 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
155 | R_X86_64_GNU_VT* to form an index into this table. */ | |
cbe950e9 | 156 | #define R_X86_64_standard (R_X86_64_IRELATIVE + 1) |
a33d77bc JB |
157 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
158 | ||
fe4770f4 | 159 | /* GNU extension to record C++ vtable hierarchy. */ |
b34976b6 AM |
160 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
161 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
162 | |
163 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
164 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
165 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
166 | FALSE) | |
8d88c4ca NC |
167 | }; |
168 | ||
d8045f23 NC |
169 | #define IS_X86_64_PCREL_TYPE(TYPE) \ |
170 | ( ((TYPE) == R_X86_64_PC8) \ | |
171 | || ((TYPE) == R_X86_64_PC16) \ | |
172 | || ((TYPE) == R_X86_64_PC32) \ | |
173 | || ((TYPE) == R_X86_64_PC64)) | |
174 | ||
8d88c4ca | 175 | /* Map BFD relocs to the x86_64 elf relocs. */ |
70256ad8 AJ |
176 | struct elf_reloc_map |
177 | { | |
8d88c4ca NC |
178 | bfd_reloc_code_real_type bfd_reloc_val; |
179 | unsigned char elf_reloc_val; | |
180 | }; | |
181 | ||
dc810e39 | 182 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 183 | { |
70256ad8 AJ |
184 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
185 | { BFD_RELOC_64, R_X86_64_64, }, | |
186 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
187 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
188 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
189 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
190 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
191 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
192 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
193 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
194 | { BFD_RELOC_32, R_X86_64_32, }, | |
195 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
196 | { BFD_RELOC_16, R_X86_64_16, }, | |
197 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
198 | { BFD_RELOC_8, R_X86_64_8, }, | |
199 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
200 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
201 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
202 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
203 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
204 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
205 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
206 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
207 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
208 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
209 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
210 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
211 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
212 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
213 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
214 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
215 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
67a4f2b7 AO |
216 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
217 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
218 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
cbe950e9 | 219 | { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, }, |
fe4770f4 AJ |
220 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
221 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
222 | }; |
223 | ||
67a4f2b7 AO |
224 | static reloc_howto_type * |
225 | elf64_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) | |
226 | { | |
227 | unsigned i; | |
228 | ||
229 | if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
230 | || r_type >= (unsigned int) R_X86_64_max) | |
231 | { | |
232 | if (r_type >= (unsigned int) R_X86_64_standard) | |
233 | { | |
234 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), | |
235 | abfd, (int) r_type); | |
236 | r_type = R_X86_64_NONE; | |
237 | } | |
238 | i = r_type; | |
239 | } | |
240 | else | |
241 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
242 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
243 | return &x86_64_elf_howto_table[i]; | |
244 | } | |
8d88c4ca NC |
245 | |
246 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
247 | static reloc_howto_type * | |
67a4f2b7 | 248 | elf64_x86_64_reloc_type_lookup (bfd *abfd, |
27482721 | 249 | bfd_reloc_code_real_type code) |
8d88c4ca NC |
250 | { |
251 | unsigned int i; | |
27482721 | 252 | |
8d88c4ca NC |
253 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
254 | i++) | |
255 | { | |
256 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
67a4f2b7 AO |
257 | return elf64_x86_64_rtype_to_howto (abfd, |
258 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca NC |
259 | } |
260 | return 0; | |
261 | } | |
262 | ||
157090f7 AM |
263 | static reloc_howto_type * |
264 | elf64_x86_64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
265 | const char *r_name) | |
266 | { | |
267 | unsigned int i; | |
268 | ||
269 | for (i = 0; | |
270 | i < (sizeof (x86_64_elf_howto_table) | |
271 | / sizeof (x86_64_elf_howto_table[0])); | |
272 | i++) | |
273 | if (x86_64_elf_howto_table[i].name != NULL | |
274 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
275 | return &x86_64_elf_howto_table[i]; | |
276 | ||
277 | return NULL; | |
278 | } | |
279 | ||
8d88c4ca | 280 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 281 | |
8d88c4ca | 282 | static void |
27482721 AJ |
283 | elf64_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
284 | Elf_Internal_Rela *dst) | |
8d88c4ca | 285 | { |
67a4f2b7 | 286 | unsigned r_type; |
8d88c4ca NC |
287 | |
288 | r_type = ELF64_R_TYPE (dst->r_info); | |
67a4f2b7 | 289 | cache_ptr->howto = elf64_x86_64_rtype_to_howto (abfd, r_type); |
8d88c4ca NC |
290 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
291 | } | |
70256ad8 | 292 | \f |
3bab7989 | 293 | /* Support for core dump NOTE sections. */ |
b34976b6 | 294 | static bfd_boolean |
27482721 | 295 | elf64_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
296 | { |
297 | int offset; | |
eea6121a | 298 | size_t size; |
3bab7989 ML |
299 | |
300 | switch (note->descsz) | |
301 | { | |
302 | default: | |
b34976b6 | 303 | return FALSE; |
3bab7989 ML |
304 | |
305 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ | |
306 | /* pr_cursig */ | |
cedb70c5 | 307 | elf_tdata (abfd)->core_signal |
3bab7989 ML |
308 | = bfd_get_16 (abfd, note->descdata + 12); |
309 | ||
310 | /* pr_pid */ | |
cedb70c5 | 311 | elf_tdata (abfd)->core_pid |
3bab7989 ML |
312 | = bfd_get_32 (abfd, note->descdata + 32); |
313 | ||
314 | /* pr_reg */ | |
315 | offset = 112; | |
eea6121a | 316 | size = 216; |
3bab7989 ML |
317 | |
318 | break; | |
319 | } | |
320 | ||
321 | /* Make a ".reg/999" section. */ | |
322 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 323 | size, note->descpos + offset); |
3bab7989 ML |
324 | } |
325 | ||
b34976b6 | 326 | static bfd_boolean |
27482721 | 327 | elf64_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
328 | { |
329 | switch (note->descsz) | |
330 | { | |
331 | default: | |
b34976b6 | 332 | return FALSE; |
3bab7989 ML |
333 | |
334 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ | |
335 | elf_tdata (abfd)->core_program | |
336 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); | |
337 | elf_tdata (abfd)->core_command | |
338 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); | |
339 | } | |
340 | ||
341 | /* Note that for some reason, a spurious space is tacked | |
342 | onto the end of the args in some (at least one anyway) | |
343 | implementations, so strip it off if it exists. */ | |
344 | ||
345 | { | |
346 | char *command = elf_tdata (abfd)->core_command; | |
347 | int n = strlen (command); | |
348 | ||
349 | if (0 < n && command[n - 1] == ' ') | |
350 | command[n - 1] = '\0'; | |
351 | } | |
352 | ||
b34976b6 | 353 | return TRUE; |
3bab7989 ML |
354 | } |
355 | \f | |
407443a3 | 356 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 357 | |
407443a3 | 358 | /* The name of the dynamic interpreter. This is put in the .interp |
70256ad8 AJ |
359 | section. */ |
360 | ||
407443a3 | 361 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
70256ad8 | 362 | |
d40d037c AJ |
363 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
364 | copying dynamic variables from a shared lib into an app's dynbss | |
365 | section, and instead use a dynamic relocation to point into the | |
366 | shared lib. */ | |
367 | #define ELIMINATE_COPY_RELOCS 1 | |
368 | ||
70256ad8 AJ |
369 | /* The size in bytes of an entry in the global offset table. */ |
370 | ||
371 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 372 | |
70256ad8 | 373 | /* The size in bytes of an entry in the procedure linkage table. */ |
8d88c4ca | 374 | |
70256ad8 AJ |
375 | #define PLT_ENTRY_SIZE 16 |
376 | ||
377 | /* The first entry in a procedure linkage table looks like this. See the | |
378 | SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */ | |
379 | ||
380 | static const bfd_byte elf64_x86_64_plt0_entry[PLT_ENTRY_SIZE] = | |
381 | { | |
653165cc AJ |
382 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
383 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 384 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
385 | }; |
386 | ||
387 | /* Subsequent entries in a procedure linkage table look like this. */ | |
388 | ||
389 | static const bfd_byte elf64_x86_64_plt_entry[PLT_ENTRY_SIZE] = | |
390 | { | |
653165cc | 391 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 392 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 393 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
394 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
395 | 0xe9, /* jmp relative */ | |
396 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
397 | }; | |
398 | ||
70256ad8 AJ |
399 | /* x86-64 ELF linker hash entry. */ |
400 | ||
401 | struct elf64_x86_64_link_hash_entry | |
402 | { | |
c434dee6 | 403 | struct elf_link_hash_entry elf; |
70256ad8 | 404 | |
c434dee6 | 405 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 406 | struct elf_dyn_relocs *dyn_relocs; |
bffbf940 JJ |
407 | |
408 | #define GOT_UNKNOWN 0 | |
409 | #define GOT_NORMAL 1 | |
410 | #define GOT_TLS_GD 2 | |
411 | #define GOT_TLS_IE 3 | |
67a4f2b7 AO |
412 | #define GOT_TLS_GDESC 4 |
413 | #define GOT_TLS_GD_BOTH_P(type) \ | |
414 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
415 | #define GOT_TLS_GD_P(type) \ | |
416 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
417 | #define GOT_TLS_GDESC_P(type) \ | |
418 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
419 | #define GOT_TLS_GD_ANY_P(type) \ | |
420 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
bffbf940 | 421 | unsigned char tls_type; |
67a4f2b7 AO |
422 | |
423 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, | |
424 | starting at the end of the jump table. */ | |
425 | bfd_vma tlsdesc_got; | |
bffbf940 JJ |
426 | }; |
427 | ||
428 | #define elf64_x86_64_hash_entry(ent) \ | |
429 | ((struct elf64_x86_64_link_hash_entry *)(ent)) | |
430 | ||
431 | struct elf64_x86_64_obj_tdata | |
432 | { | |
433 | struct elf_obj_tdata root; | |
434 | ||
435 | /* tls_type for each local got entry. */ | |
436 | char *local_got_tls_type; | |
67a4f2b7 AO |
437 | |
438 | /* GOTPLT entries for TLS descriptors. */ | |
439 | bfd_vma *local_tlsdesc_gotent; | |
70256ad8 AJ |
440 | }; |
441 | ||
bffbf940 JJ |
442 | #define elf64_x86_64_tdata(abfd) \ |
443 | ((struct elf64_x86_64_obj_tdata *) (abfd)->tdata.any) | |
444 | ||
445 | #define elf64_x86_64_local_got_tls_type(abfd) \ | |
446 | (elf64_x86_64_tdata (abfd)->local_got_tls_type) | |
447 | ||
67a4f2b7 AO |
448 | #define elf64_x86_64_local_tlsdesc_gotent(abfd) \ |
449 | (elf64_x86_64_tdata (abfd)->local_tlsdesc_gotent) | |
bffbf940 | 450 | |
0ffa91dd NC |
451 | #define is_x86_64_elf(bfd) \ |
452 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
453 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 454 | && elf_object_id (bfd) == X86_64_ELF_DATA) |
0ffa91dd NC |
455 | |
456 | static bfd_boolean | |
457 | elf64_x86_64_mkobject (bfd *abfd) | |
458 | { | |
459 | return bfd_elf_allocate_object (abfd, sizeof (struct elf64_x86_64_obj_tdata), | |
4dfe6ac6 | 460 | X86_64_ELF_DATA); |
0ffa91dd NC |
461 | } |
462 | ||
c434dee6 | 463 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 464 | |
407443a3 AJ |
465 | struct elf64_x86_64_link_hash_table |
466 | { | |
c434dee6 | 467 | struct elf_link_hash_table elf; |
70256ad8 | 468 | |
c434dee6 | 469 | /* Short-cuts to get to dynamic linker sections. */ |
c434dee6 AJ |
470 | asection *sdynbss; |
471 | asection *srelbss; | |
70256ad8 | 472 | |
4dfe6ac6 NC |
473 | union |
474 | { | |
bffbf940 JJ |
475 | bfd_signed_vma refcount; |
476 | bfd_vma offset; | |
477 | } tls_ld_got; | |
478 | ||
67a4f2b7 AO |
479 | /* The amount of space used by the jump slots in the GOT. */ |
480 | bfd_vma sgotplt_jump_table_size; | |
481 | ||
87d72d41 AM |
482 | /* Small local sym cache. */ |
483 | struct sym_cache sym_cache; | |
9f03412a AO |
484 | |
485 | /* _TLS_MODULE_BASE_ symbol. */ | |
486 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
487 | |
488 | /* Used by local STT_GNU_IFUNC symbols. */ | |
489 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
490 | void * loc_hash_memory; |
491 | ||
492 | /* The offset into splt of the PLT entry for the TLS descriptor | |
493 | resolver. Special values are 0, if not necessary (or not found | |
494 | to be necessary yet), and -1 if needed but not determined | |
495 | yet. */ | |
496 | bfd_vma tlsdesc_plt; | |
497 | /* The offset into sgot of the GOT entry used by the PLT entry | |
498 | above. */ | |
499 | bfd_vma tlsdesc_got; | |
c434dee6 | 500 | }; |
70256ad8 AJ |
501 | |
502 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca NC |
503 | |
504 | #define elf64_x86_64_hash_table(p) \ | |
4dfe6ac6 NC |
505 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
506 | == X86_64_ELF_DATA ? ((struct elf64_x86_64_link_hash_table *) ((p)->hash)) : NULL) | |
8d88c4ca | 507 | |
67a4f2b7 | 508 | #define elf64_x86_64_compute_jump_table_size(htab) \ |
6de2ae4a | 509 | ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE) |
67a4f2b7 | 510 | |
407443a3 | 511 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
512 | |
513 | static struct bfd_hash_entry * | |
eb4ff4d6 L |
514 | elf64_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry, |
515 | struct bfd_hash_table *table, | |
516 | const char *string) | |
70256ad8 | 517 | { |
70256ad8 | 518 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
519 | subclass. */ |
520 | if (entry == NULL) | |
521 | { | |
a50b1753 NC |
522 | entry = (struct bfd_hash_entry *) |
523 | bfd_hash_allocate (table, | |
524 | sizeof (struct elf64_x86_64_link_hash_entry)); | |
c434dee6 AJ |
525 | if (entry == NULL) |
526 | return entry; | |
527 | } | |
70256ad8 AJ |
528 | |
529 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
530 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
531 | if (entry != NULL) | |
70256ad8 | 532 | { |
c434dee6 AJ |
533 | struct elf64_x86_64_link_hash_entry *eh; |
534 | ||
535 | eh = (struct elf64_x86_64_link_hash_entry *) entry; | |
536 | eh->dyn_relocs = NULL; | |
bffbf940 | 537 | eh->tls_type = GOT_UNKNOWN; |
67a4f2b7 | 538 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
539 | } |
540 | ||
c434dee6 | 541 | return entry; |
70256ad8 AJ |
542 | } |
543 | ||
c25bc9fc L |
544 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
545 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
546 | as global symbol. We reuse indx and dynstr_index for local symbol | |
547 | hash since they aren't used by global symbols in this backend. */ | |
548 | ||
549 | static hashval_t | |
550 | elf64_x86_64_local_htab_hash (const void *ptr) | |
551 | { | |
552 | struct elf_link_hash_entry *h | |
553 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 554 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
555 | } |
556 | ||
557 | /* Compare local hash entries. */ | |
558 | ||
559 | static int | |
560 | elf64_x86_64_local_htab_eq (const void *ptr1, const void *ptr2) | |
561 | { | |
562 | struct elf_link_hash_entry *h1 | |
563 | = (struct elf_link_hash_entry *) ptr1; | |
564 | struct elf_link_hash_entry *h2 | |
565 | = (struct elf_link_hash_entry *) ptr2; | |
566 | ||
567 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
568 | } | |
569 | ||
570 | /* Find and/or create a hash entry for local symbol. */ | |
571 | ||
572 | static struct elf_link_hash_entry * | |
573 | elf64_x86_64_get_local_sym_hash (struct elf64_x86_64_link_hash_table *htab, | |
574 | bfd *abfd, const Elf_Internal_Rela *rel, | |
575 | bfd_boolean create) | |
576 | { | |
577 | struct elf64_x86_64_link_hash_entry e, *ret; | |
578 | asection *sec = abfd->sections; | |
d2149d72 L |
579 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
580 | ELF64_R_SYM (rel->r_info)); | |
c25bc9fc L |
581 | void **slot; |
582 | ||
583 | e.elf.indx = sec->id; | |
584 | e.elf.dynstr_index = ELF64_R_SYM (rel->r_info); | |
585 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, | |
586 | create ? INSERT : NO_INSERT); | |
587 | ||
588 | if (!slot) | |
589 | return NULL; | |
590 | ||
591 | if (*slot) | |
592 | { | |
593 | ret = (struct elf64_x86_64_link_hash_entry *) *slot; | |
594 | return &ret->elf; | |
595 | } | |
596 | ||
597 | ret = (struct elf64_x86_64_link_hash_entry *) | |
598 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, | |
599 | sizeof (struct elf64_x86_64_link_hash_entry)); | |
600 | if (ret) | |
601 | { | |
602 | memset (ret, 0, sizeof (*ret)); | |
603 | ret->elf.indx = sec->id; | |
604 | ret->elf.dynstr_index = ELF64_R_SYM (rel->r_info); | |
605 | ret->elf.dynindx = -1; | |
c25bc9fc L |
606 | *slot = ret; |
607 | } | |
608 | return &ret->elf; | |
609 | } | |
610 | ||
8d88c4ca NC |
611 | /* Create an X86-64 ELF linker hash table. */ |
612 | ||
613 | static struct bfd_link_hash_table * | |
27482721 | 614 | elf64_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca NC |
615 | { |
616 | struct elf64_x86_64_link_hash_table *ret; | |
dc810e39 | 617 | bfd_size_type amt = sizeof (struct elf64_x86_64_link_hash_table); |
8d88c4ca | 618 | |
e2d34d7d | 619 | ret = (struct elf64_x86_64_link_hash_table *) bfd_malloc (amt); |
c434dee6 | 620 | if (ret == NULL) |
8d88c4ca NC |
621 | return NULL; |
622 | ||
eb4ff4d6 L |
623 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
624 | elf64_x86_64_link_hash_newfunc, | |
4dfe6ac6 NC |
625 | sizeof (struct elf64_x86_64_link_hash_entry), |
626 | X86_64_ELF_DATA)) | |
8d88c4ca | 627 | { |
e2d34d7d | 628 | free (ret); |
8d88c4ca NC |
629 | return NULL; |
630 | } | |
631 | ||
c434dee6 AJ |
632 | ret->sdynbss = NULL; |
633 | ret->srelbss = NULL; | |
87d72d41 | 634 | ret->sym_cache.abfd = NULL; |
67a4f2b7 AO |
635 | ret->tlsdesc_plt = 0; |
636 | ret->tlsdesc_got = 0; | |
bffbf940 | 637 | ret->tls_ld_got.refcount = 0; |
67a4f2b7 | 638 | ret->sgotplt_jump_table_size = 0; |
9f03412a | 639 | ret->tls_module_base = NULL; |
6bbec505 | 640 | |
c25bc9fc L |
641 | ret->loc_hash_table = htab_try_create (1024, |
642 | elf64_x86_64_local_htab_hash, | |
643 | elf64_x86_64_local_htab_eq, | |
644 | NULL); | |
645 | ret->loc_hash_memory = objalloc_create (); | |
646 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
647 | { | |
648 | free (ret); | |
649 | return NULL; | |
650 | } | |
651 | ||
c434dee6 AJ |
652 | return &ret->elf.root; |
653 | } | |
654 | ||
c25bc9fc L |
655 | /* Destroy an X86-64 ELF linker hash table. */ |
656 | ||
657 | static void | |
658 | elf64_x86_64_link_hash_table_free (struct bfd_link_hash_table *hash) | |
659 | { | |
660 | struct elf64_x86_64_link_hash_table *htab | |
661 | = (struct elf64_x86_64_link_hash_table *) hash; | |
662 | ||
663 | if (htab->loc_hash_table) | |
664 | htab_delete (htab->loc_hash_table); | |
665 | if (htab->loc_hash_memory) | |
666 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
667 | _bfd_generic_link_hash_table_free (hash); | |
668 | } | |
669 | ||
c434dee6 AJ |
670 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
671 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
672 | hash table. */ | |
673 | ||
b34976b6 | 674 | static bfd_boolean |
27482721 | 675 | elf64_x86_64_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
c434dee6 AJ |
676 | { |
677 | struct elf64_x86_64_link_hash_table *htab; | |
678 | ||
c434dee6 | 679 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 680 | return FALSE; |
c434dee6 | 681 | |
6de2ae4a | 682 | htab = elf64_x86_64_hash_table (info); |
4dfe6ac6 NC |
683 | if (htab == NULL) |
684 | return FALSE; | |
685 | ||
c434dee6 AJ |
686 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); |
687 | if (!info->shared) | |
688 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
689 | ||
6de2ae4a | 690 | if (!htab->sdynbss |
c434dee6 AJ |
691 | || (!info->shared && !htab->srelbss)) |
692 | abort (); | |
693 | ||
b34976b6 | 694 | return TRUE; |
c434dee6 AJ |
695 | } |
696 | ||
697 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
698 | ||
699 | static void | |
fcfa13d2 | 700 | elf64_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
27482721 AJ |
701 | struct elf_link_hash_entry *dir, |
702 | struct elf_link_hash_entry *ind) | |
c434dee6 AJ |
703 | { |
704 | struct elf64_x86_64_link_hash_entry *edir, *eind; | |
705 | ||
706 | edir = (struct elf64_x86_64_link_hash_entry *) dir; | |
707 | eind = (struct elf64_x86_64_link_hash_entry *) ind; | |
708 | ||
709 | if (eind->dyn_relocs != NULL) | |
710 | { | |
711 | if (edir->dyn_relocs != NULL) | |
712 | { | |
e03a8ed8 L |
713 | struct elf_dyn_relocs **pp; |
714 | struct elf_dyn_relocs *p; | |
c434dee6 | 715 | |
fcfa13d2 | 716 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
717 | list. Merge any entries against the same section. */ |
718 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
719 | { | |
e03a8ed8 | 720 | struct elf_dyn_relocs *q; |
c434dee6 AJ |
721 | |
722 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
723 | if (q->sec == p->sec) | |
724 | { | |
725 | q->pc_count += p->pc_count; | |
726 | q->count += p->count; | |
727 | *pp = p->next; | |
728 | break; | |
729 | } | |
730 | if (q == NULL) | |
731 | pp = &p->next; | |
732 | } | |
733 | *pp = edir->dyn_relocs; | |
734 | } | |
735 | ||
736 | edir->dyn_relocs = eind->dyn_relocs; | |
737 | eind->dyn_relocs = NULL; | |
738 | } | |
739 | ||
bffbf940 JJ |
740 | if (ind->root.type == bfd_link_hash_indirect |
741 | && dir->got.refcount <= 0) | |
742 | { | |
743 | edir->tls_type = eind->tls_type; | |
744 | eind->tls_type = GOT_UNKNOWN; | |
745 | } | |
746 | ||
d40d037c AJ |
747 | if (ELIMINATE_COPY_RELOCS |
748 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
749 | && dir->dynamic_adjusted) |
750 | { | |
751 | /* If called to transfer flags for a weakdef during processing | |
752 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
753 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
754 | dir->ref_dynamic |= ind->ref_dynamic; | |
755 | dir->ref_regular |= ind->ref_regular; | |
756 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
757 | dir->needs_plt |= ind->needs_plt; | |
758 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
759 | } | |
d40d037c | 760 | else |
fcfa13d2 | 761 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
8d88c4ca NC |
762 | } |
763 | ||
b34976b6 | 764 | static bfd_boolean |
27482721 | 765 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 766 | { |
8d88c4ca NC |
767 | /* Set the right machine number for an x86-64 elf64 file. */ |
768 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 769 | return TRUE; |
8d88c4ca NC |
770 | } |
771 | ||
142411ca L |
772 | typedef union |
773 | { | |
774 | unsigned char c[2]; | |
775 | uint16_t i; | |
776 | } | |
777 | x86_64_opcode16; | |
778 | ||
779 | typedef union | |
780 | { | |
781 | unsigned char c[4]; | |
782 | uint32_t i; | |
783 | } | |
784 | x86_64_opcode32; | |
785 | ||
786 | /* Return TRUE if the TLS access code sequence support transition | |
787 | from R_TYPE. */ | |
788 | ||
789 | static bfd_boolean | |
790 | elf64_x86_64_check_tls_transition (bfd *abfd, asection *sec, | |
791 | bfd_byte *contents, | |
792 | Elf_Internal_Shdr *symtab_hdr, | |
793 | struct elf_link_hash_entry **sym_hashes, | |
794 | unsigned int r_type, | |
795 | const Elf_Internal_Rela *rel, | |
796 | const Elf_Internal_Rela *relend) | |
bffbf940 | 797 | { |
142411ca L |
798 | unsigned int val; |
799 | unsigned long r_symndx; | |
800 | struct elf_link_hash_entry *h; | |
801 | bfd_vma offset; | |
802 | ||
803 | /* Get the section contents. */ | |
804 | if (contents == NULL) | |
805 | { | |
806 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
807 | contents = elf_section_data (sec)->this_hdr.contents; | |
808 | else | |
809 | { | |
810 | /* FIXME: How to better handle error condition? */ | |
811 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
812 | return FALSE; | |
bffbf940 | 813 | |
142411ca L |
814 | /* Cache the section contents for elf_link_input_bfd. */ |
815 | elf_section_data (sec)->this_hdr.contents = contents; | |
816 | } | |
817 | } | |
818 | ||
819 | offset = rel->r_offset; | |
bffbf940 | 820 | switch (r_type) |
142411ca L |
821 | { |
822 | case R_X86_64_TLSGD: | |
823 | case R_X86_64_TLSLD: | |
824 | if ((rel + 1) >= relend) | |
825 | return FALSE; | |
826 | ||
827 | if (r_type == R_X86_64_TLSGD) | |
828 | { | |
829 | /* Check transition from GD access model. Only | |
830 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
831 | .word 0x6666; rex64; call __tls_get_addr | |
832 | can transit to different access model. */ | |
833 | ||
834 | static x86_64_opcode32 leaq = { { 0x66, 0x48, 0x8d, 0x3d } }, | |
835 | call = { { 0x66, 0x66, 0x48, 0xe8 } }; | |
836 | if (offset < 4 | |
837 | || (offset + 12) > sec->size | |
838 | || bfd_get_32 (abfd, contents + offset - 4) != leaq.i | |
839 | || bfd_get_32 (abfd, contents + offset + 4) != call.i) | |
840 | return FALSE; | |
841 | } | |
842 | else | |
843 | { | |
844 | /* Check transition from LD access model. Only | |
845 | leaq foo@tlsld(%rip), %rdi; | |
846 | call __tls_get_addr | |
847 | can transit to different access model. */ | |
848 | ||
849 | static x86_64_opcode32 ld = { { 0x48, 0x8d, 0x3d, 0xe8 } }; | |
850 | x86_64_opcode32 op; | |
851 | ||
852 | if (offset < 3 || (offset + 9) > sec->size) | |
853 | return FALSE; | |
854 | ||
855 | op.i = bfd_get_32 (abfd, contents + offset - 3); | |
856 | op.c[3] = bfd_get_8 (abfd, contents + offset + 4); | |
857 | if (op.i != ld.i) | |
858 | return FALSE; | |
859 | } | |
860 | ||
861 | r_symndx = ELF64_R_SYM (rel[1].r_info); | |
862 | if (r_symndx < symtab_hdr->sh_info) | |
863 | return FALSE; | |
864 | ||
865 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
c4fb387b L |
866 | /* Use strncmp to check __tls_get_addr since __tls_get_addr |
867 | may be versioned. */ | |
142411ca L |
868 | return (h != NULL |
869 | && h->root.root.string != NULL | |
870 | && (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PC32 | |
871 | || ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32) | |
c4fb387b L |
872 | && (strncmp (h->root.root.string, |
873 | "__tls_get_addr", 14) == 0)); | |
142411ca L |
874 | |
875 | case R_X86_64_GOTTPOFF: | |
876 | /* Check transition from IE access model: | |
877 | movq foo@gottpoff(%rip), %reg | |
878 | addq foo@gottpoff(%rip), %reg | |
879 | */ | |
880 | ||
881 | if (offset < 3 || (offset + 4) > sec->size) | |
882 | return FALSE; | |
883 | ||
884 | val = bfd_get_8 (abfd, contents + offset - 3); | |
885 | if (val != 0x48 && val != 0x4c) | |
886 | return FALSE; | |
887 | ||
888 | val = bfd_get_8 (abfd, contents + offset - 2); | |
889 | if (val != 0x8b && val != 0x03) | |
890 | return FALSE; | |
891 | ||
892 | val = bfd_get_8 (abfd, contents + offset - 1); | |
893 | return (val & 0xc7) == 5; | |
894 | ||
895 | case R_X86_64_GOTPC32_TLSDESC: | |
896 | /* Check transition from GDesc access model: | |
897 | leaq x@tlsdesc(%rip), %rax | |
898 | ||
899 | Make sure it's a leaq adding rip to a 32-bit offset | |
900 | into any register, although it's probably almost always | |
901 | going to be rax. */ | |
902 | ||
903 | if (offset < 3 || (offset + 4) > sec->size) | |
904 | return FALSE; | |
905 | ||
906 | val = bfd_get_8 (abfd, contents + offset - 3); | |
907 | if ((val & 0xfb) != 0x48) | |
908 | return FALSE; | |
909 | ||
910 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
911 | return FALSE; | |
912 | ||
913 | val = bfd_get_8 (abfd, contents + offset - 1); | |
914 | return (val & 0xc7) == 0x05; | |
915 | ||
916 | case R_X86_64_TLSDESC_CALL: | |
917 | /* Check transition from GDesc access model: | |
918 | call *x@tlsdesc(%rax) | |
919 | */ | |
920 | if (offset + 2 <= sec->size) | |
921 | { | |
922 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
923 | static x86_64_opcode16 call = { { 0xff, 0x10 } }; | |
924 | return bfd_get_16 (abfd, contents + offset) == call.i; | |
925 | } | |
926 | ||
927 | return FALSE; | |
928 | ||
929 | default: | |
930 | abort (); | |
931 | } | |
932 | } | |
933 | ||
934 | /* Return TRUE if the TLS access transition is OK or no transition | |
935 | will be performed. Update R_TYPE if there is a transition. */ | |
936 | ||
937 | static bfd_boolean | |
938 | elf64_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, | |
939 | asection *sec, bfd_byte *contents, | |
940 | Elf_Internal_Shdr *symtab_hdr, | |
941 | struct elf_link_hash_entry **sym_hashes, | |
942 | unsigned int *r_type, int tls_type, | |
943 | const Elf_Internal_Rela *rel, | |
944 | const Elf_Internal_Rela *relend, | |
4c544807 L |
945 | struct elf_link_hash_entry *h, |
946 | unsigned long r_symndx) | |
142411ca L |
947 | { |
948 | unsigned int from_type = *r_type; | |
949 | unsigned int to_type = from_type; | |
950 | bfd_boolean check = TRUE; | |
951 | ||
bb1cb422 L |
952 | /* Skip TLS transition for functions. */ |
953 | if (h != NULL | |
954 | && (h->type == STT_FUNC | |
955 | || h->type == STT_GNU_IFUNC)) | |
956 | return TRUE; | |
957 | ||
142411ca | 958 | switch (from_type) |
bffbf940 JJ |
959 | { |
960 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
961 | case R_X86_64_GOTPC32_TLSDESC: |
962 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 963 | case R_X86_64_GOTTPOFF: |
1d85728f | 964 | if (info->executable) |
142411ca L |
965 | { |
966 | if (h == NULL) | |
967 | to_type = R_X86_64_TPOFF32; | |
968 | else | |
969 | to_type = R_X86_64_GOTTPOFF; | |
970 | } | |
971 | ||
972 | /* When we are called from elf64_x86_64_relocate_section, | |
973 | CONTENTS isn't NULL and there may be additional transitions | |
974 | based on TLS_TYPE. */ | |
975 | if (contents != NULL) | |
976 | { | |
977 | unsigned int new_to_type = to_type; | |
978 | ||
1d85728f | 979 | if (info->executable |
142411ca L |
980 | && h != NULL |
981 | && h->dynindx == -1 | |
982 | && tls_type == GOT_TLS_IE) | |
983 | new_to_type = R_X86_64_TPOFF32; | |
984 | ||
985 | if (to_type == R_X86_64_TLSGD | |
986 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
987 | || to_type == R_X86_64_TLSDESC_CALL) | |
988 | { | |
989 | if (tls_type == GOT_TLS_IE) | |
990 | new_to_type = R_X86_64_GOTTPOFF; | |
991 | } | |
992 | ||
993 | /* We checked the transition before when we were called from | |
994 | elf64_x86_64_check_relocs. We only want to check the new | |
995 | transition which hasn't been checked before. */ | |
996 | check = new_to_type != to_type && from_type == to_type; | |
997 | to_type = new_to_type; | |
998 | } | |
999 | ||
1000 | break; | |
1001 | ||
bffbf940 | 1002 | case R_X86_64_TLSLD: |
1d85728f | 1003 | if (info->executable) |
142411ca L |
1004 | to_type = R_X86_64_TPOFF32; |
1005 | break; | |
1006 | ||
1007 | default: | |
1008 | return TRUE; | |
bffbf940 JJ |
1009 | } |
1010 | ||
142411ca L |
1011 | /* Return TRUE if there is no transition. */ |
1012 | if (from_type == to_type) | |
1013 | return TRUE; | |
1014 | ||
1015 | /* Check if the transition can be performed. */ | |
1016 | if (check | |
1017 | && ! elf64_x86_64_check_tls_transition (abfd, sec, contents, | |
1018 | symtab_hdr, sym_hashes, | |
1019 | from_type, rel, relend)) | |
1020 | { | |
2f629d23 | 1021 | reloc_howto_type *from, *to; |
4c544807 | 1022 | const char *name; |
142411ca L |
1023 | |
1024 | from = elf64_x86_64_rtype_to_howto (abfd, from_type); | |
1025 | to = elf64_x86_64_rtype_to_howto (abfd, to_type); | |
1026 | ||
4c544807 L |
1027 | if (h) |
1028 | name = h->root.root.string; | |
1029 | else | |
1030 | { | |
4c544807 | 1031 | struct elf64_x86_64_link_hash_table *htab; |
4dfe6ac6 | 1032 | |
4c544807 | 1033 | htab = elf64_x86_64_hash_table (info); |
4dfe6ac6 NC |
1034 | if (htab == NULL) |
1035 | name = "*unknown*"; | |
1036 | else | |
1037 | { | |
1038 | Elf_Internal_Sym *isym; | |
1039 | ||
1040 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1041 | abfd, r_symndx); | |
1042 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1043 | } | |
4c544807 L |
1044 | } |
1045 | ||
142411ca L |
1046 | (*_bfd_error_handler) |
1047 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1048 | "in section `%A' failed"), | |
4c544807 | 1049 | abfd, sec, from->name, to->name, name, |
142411ca L |
1050 | (unsigned long) rel->r_offset); |
1051 | bfd_set_error (bfd_error_bad_value); | |
1052 | return FALSE; | |
1053 | } | |
1054 | ||
1055 | *r_type = to_type; | |
1056 | return TRUE; | |
bffbf940 JJ |
1057 | } |
1058 | ||
70256ad8 | 1059 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1060 | calculate needed space in the global offset table, procedure |
1061 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1062 | |
b34976b6 | 1063 | static bfd_boolean |
142411ca L |
1064 | elf64_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1065 | asection *sec, | |
27482721 | 1066 | const Elf_Internal_Rela *relocs) |
70256ad8 | 1067 | { |
c434dee6 | 1068 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1069 | Elf_Internal_Shdr *symtab_hdr; |
1070 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1071 | const Elf_Internal_Rela *rel; |
1072 | const Elf_Internal_Rela *rel_end; | |
70256ad8 AJ |
1073 | asection *sreloc; |
1074 | ||
1049f94e | 1075 | if (info->relocatable) |
b34976b6 | 1076 | return TRUE; |
70256ad8 | 1077 | |
0ffa91dd NC |
1078 | BFD_ASSERT (is_x86_64_elf (abfd)); |
1079 | ||
c434dee6 | 1080 | htab = elf64_x86_64_hash_table (info); |
4dfe6ac6 NC |
1081 | if (htab == NULL) |
1082 | return FALSE; | |
1083 | ||
0ffa91dd | 1084 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1085 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1086 | |
c434dee6 | 1087 | sreloc = NULL; |
cbe950e9 | 1088 | |
70256ad8 AJ |
1089 | rel_end = relocs + sec->reloc_count; |
1090 | for (rel = relocs; rel < rel_end; rel++) | |
1091 | { | |
bffbf940 | 1092 | unsigned int r_type; |
70256ad8 AJ |
1093 | unsigned long r_symndx; |
1094 | struct elf_link_hash_entry *h; | |
4c544807 L |
1095 | Elf_Internal_Sym *isym; |
1096 | const char *name; | |
70256ad8 AJ |
1097 | |
1098 | r_symndx = ELF64_R_SYM (rel->r_info); | |
bffbf940 | 1099 | r_type = ELF64_R_TYPE (rel->r_info); |
c434dee6 AJ |
1100 | |
1101 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1102 | { | |
d003868e AM |
1103 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1104 | abfd, r_symndx); | |
b34976b6 | 1105 | return FALSE; |
c434dee6 AJ |
1106 | } |
1107 | ||
70256ad8 | 1108 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1109 | { |
1110 | /* A local symbol. */ | |
c2e61a4e L |
1111 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1112 | abfd, r_symndx); | |
1113 | if (isym == NULL) | |
1114 | return FALSE; | |
c25bc9fc L |
1115 | |
1116 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
c25bc9fc L |
1117 | if (ELF64_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
1118 | { | |
1119 | h = elf64_x86_64_get_local_sym_hash (htab, abfd, rel, | |
1120 | TRUE); | |
1121 | if (h == NULL) | |
c2e61a4e | 1122 | return FALSE; |
6bbec505 | 1123 | |
c25bc9fc L |
1124 | /* Fake a STT_GNU_IFUNC symbol. */ |
1125 | h->type = STT_GNU_IFUNC; | |
1126 | h->def_regular = 1; | |
1127 | h->ref_regular = 1; | |
1128 | h->forced_local = 1; | |
1129 | h->root.type = bfd_link_hash_defined; | |
1130 | } | |
1131 | else | |
1132 | h = NULL; | |
1133 | } | |
70256ad8 | 1134 | else |
71cb9464 | 1135 | { |
4c544807 | 1136 | isym = NULL; |
71cb9464 L |
1137 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1138 | while (h->root.type == bfd_link_hash_indirect | |
1139 | || h->root.type == bfd_link_hash_warning) | |
1140 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1141 | } |
cbe950e9 | 1142 | |
c25bc9fc L |
1143 | if (h != NULL) |
1144 | { | |
cbe950e9 L |
1145 | /* Create the ifunc sections for static executables. If we |
1146 | never see an indirect function symbol nor we are building | |
1147 | a static executable, those sections will be empty and | |
1148 | won't appear in output. */ | |
1149 | switch (r_type) | |
1150 | { | |
1151 | default: | |
1152 | break; | |
1153 | ||
1154 | case R_X86_64_32S: | |
1155 | case R_X86_64_32: | |
1156 | case R_X86_64_64: | |
1157 | case R_X86_64_PC32: | |
1158 | case R_X86_64_PC64: | |
1159 | case R_X86_64_PLT32: | |
1160 | case R_X86_64_GOTPCREL: | |
1161 | case R_X86_64_GOTPCREL64: | |
6de2ae4a | 1162 | if (!_bfd_elf_create_ifunc_sections (abfd, info)) |
c2e61a4e | 1163 | return FALSE; |
cbe950e9 L |
1164 | break; |
1165 | } | |
1166 | ||
1167 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle | |
1168 | it here if it is defined in a non-shared object. */ | |
1169 | if (h->type == STT_GNU_IFUNC | |
1170 | && h->def_regular) | |
1171 | { | |
1172 | /* It is referenced by a non-shared object. */ | |
1173 | h->ref_regular = 1; | |
7ae26bc1 | 1174 | h->needs_plt = 1; |
6bbec505 | 1175 | |
cbe950e9 L |
1176 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
1177 | h->plt.refcount += 1; | |
1178 | ||
1179 | /* STT_GNU_IFUNC needs dynamic sections. */ | |
1180 | if (htab->elf.dynobj == NULL) | |
1181 | htab->elf.dynobj = abfd; | |
1182 | ||
1183 | switch (r_type) | |
1184 | { | |
048cbda4 | 1185 | default: |
4c544807 L |
1186 | if (h->root.root.string) |
1187 | name = h->root.root.string; | |
1188 | else | |
1189 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1190 | NULL); | |
048cbda4 L |
1191 | (*_bfd_error_handler) |
1192 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
1193 | "symbol `%s' isn't handled by %s"), abfd, | |
1194 | x86_64_elf_howto_table[r_type].name, | |
4c544807 | 1195 | name, __FUNCTION__); |
048cbda4 | 1196 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1197 | return FALSE; |
cbe950e9 | 1198 | |
710ab287 L |
1199 | case R_X86_64_64: |
1200 | h->non_got_ref = 1; | |
1201 | h->pointer_equality_needed = 1; | |
1202 | if (info->shared) | |
1203 | { | |
710ab287 L |
1204 | /* We must copy these reloc types into the output |
1205 | file. Create a reloc section in dynobj and | |
1206 | make room for this reloc. */ | |
e03a8ed8 L |
1207 | sreloc = _bfd_elf_create_ifunc_dyn_reloc |
1208 | (abfd, info, sec, sreloc, | |
1209 | &((struct elf64_x86_64_link_hash_entry *) h)->dyn_relocs); | |
710ab287 | 1210 | if (sreloc == NULL) |
c2e61a4e | 1211 | return FALSE; |
710ab287 L |
1212 | } |
1213 | break; | |
1214 | ||
cbe950e9 L |
1215 | case R_X86_64_32S: |
1216 | case R_X86_64_32: | |
cbe950e9 L |
1217 | case R_X86_64_PC32: |
1218 | case R_X86_64_PC64: | |
1219 | h->non_got_ref = 1; | |
1220 | if (r_type != R_X86_64_PC32 | |
1221 | && r_type != R_X86_64_PC64) | |
1222 | h->pointer_equality_needed = 1; | |
1223 | break; | |
1224 | ||
1225 | case R_X86_64_PLT32: | |
1226 | break; | |
1227 | ||
1228 | case R_X86_64_GOTPCREL: | |
1229 | case R_X86_64_GOTPCREL64: | |
7afd84dc | 1230 | h->got.refcount += 1; |
6de2ae4a L |
1231 | if (htab->elf.sgot == NULL |
1232 | && !_bfd_elf_create_got_section (htab->elf.dynobj, | |
1233 | info)) | |
c2e61a4e | 1234 | return FALSE; |
cbe950e9 L |
1235 | break; |
1236 | } | |
1237 | ||
1238 | continue; | |
1239 | } | |
71cb9464 | 1240 | } |
70256ad8 | 1241 | |
142411ca L |
1242 | if (! elf64_x86_64_tls_transition (info, abfd, sec, NULL, |
1243 | symtab_hdr, sym_hashes, | |
1244 | &r_type, GOT_UNKNOWN, | |
4c544807 | 1245 | rel, rel_end, h, r_symndx)) |
c2e61a4e | 1246 | return FALSE; |
142411ca | 1247 | |
bffbf940 | 1248 | switch (r_type) |
70256ad8 | 1249 | { |
bffbf940 JJ |
1250 | case R_X86_64_TLSLD: |
1251 | htab->tls_ld_got.refcount += 1; | |
1252 | goto create_got; | |
1253 | ||
1254 | case R_X86_64_TPOFF32: | |
9b769489 | 1255 | if (!info->executable) |
70256ad8 | 1256 | { |
09a24cbf | 1257 | if (h) |
4c544807 L |
1258 | name = h->root.root.string; |
1259 | else | |
1260 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1261 | NULL); | |
bffbf940 | 1262 | (*_bfd_error_handler) |
d003868e AM |
1263 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
1264 | abfd, | |
4c544807 | 1265 | x86_64_elf_howto_table[r_type].name, name); |
bffbf940 | 1266 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1267 | return FALSE; |
70256ad8 | 1268 | } |
bffbf940 | 1269 | break; |
c434dee6 | 1270 | |
bffbf940 | 1271 | case R_X86_64_GOTTPOFF: |
1d85728f | 1272 | if (!info->executable) |
bffbf940 JJ |
1273 | info->flags |= DF_STATIC_TLS; |
1274 | /* Fall through */ | |
70256ad8 | 1275 | |
bffbf940 JJ |
1276 | case R_X86_64_GOT32: |
1277 | case R_X86_64_GOTPCREL: | |
1278 | case R_X86_64_TLSGD: | |
7b81dfbb AJ |
1279 | case R_X86_64_GOT64: |
1280 | case R_X86_64_GOTPCREL64: | |
1281 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
1282 | case R_X86_64_GOTPC32_TLSDESC: |
1283 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
1284 | /* This symbol requires a global offset table entry. */ |
1285 | { | |
1286 | int tls_type, old_tls_type; | |
1287 | ||
1288 | switch (r_type) | |
1289 | { | |
1290 | default: tls_type = GOT_NORMAL; break; | |
1291 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
1292 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
1293 | case R_X86_64_GOTPC32_TLSDESC: |
1294 | case R_X86_64_TLSDESC_CALL: | |
1295 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
1296 | } |
1297 | ||
1298 | if (h != NULL) | |
1299 | { | |
7b81dfbb AJ |
1300 | if (r_type == R_X86_64_GOTPLT64) |
1301 | { | |
1302 | /* This relocation indicates that we also need | |
1303 | a PLT entry, as this is a function. We don't need | |
1304 | a PLT entry for local symbols. */ | |
1305 | h->needs_plt = 1; | |
1306 | h->plt.refcount += 1; | |
1307 | } | |
bffbf940 JJ |
1308 | h->got.refcount += 1; |
1309 | old_tls_type = elf64_x86_64_hash_entry (h)->tls_type; | |
1310 | } | |
1311 | else | |
1312 | { | |
1313 | bfd_signed_vma *local_got_refcounts; | |
1314 | ||
1315 | /* This is a global offset table entry for a local symbol. */ | |
1316 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1317 | if (local_got_refcounts == NULL) | |
1318 | { | |
1319 | bfd_size_type size; | |
1320 | ||
1321 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1322 | size *= sizeof (bfd_signed_vma) |
1323 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
1324 | local_got_refcounts = ((bfd_signed_vma *) |
1325 | bfd_zalloc (abfd, size)); | |
1326 | if (local_got_refcounts == NULL) | |
c2e61a4e | 1327 | return FALSE; |
bffbf940 | 1328 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
67a4f2b7 AO |
1329 | elf64_x86_64_local_tlsdesc_gotent (abfd) |
1330 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); | |
bffbf940 | 1331 | elf64_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 1332 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
1333 | } |
1334 | local_got_refcounts[r_symndx] += 1; | |
1335 | old_tls_type | |
1336 | = elf64_x86_64_local_got_tls_type (abfd) [r_symndx]; | |
1337 | } | |
1338 | ||
1339 | /* If a TLS symbol is accessed using IE at least once, | |
1340 | there is no point to use dynamic model for it. */ | |
1341 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
1342 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
1343 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 1344 | { |
67a4f2b7 | 1345 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 1346 | tls_type = old_tls_type; |
67a4f2b7 AO |
1347 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1348 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1349 | tls_type |= old_tls_type; | |
bffbf940 JJ |
1350 | else |
1351 | { | |
09a24cbf | 1352 | if (h) |
4c544807 L |
1353 | name = h->root.root.string; |
1354 | else | |
1355 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
1356 | isym, NULL); | |
bffbf940 | 1357 | (*_bfd_error_handler) |
1f7a4e42 | 1358 | (_("%B: '%s' accessed both as normal and thread local symbol"), |
4c544807 | 1359 | abfd, name); |
c2e61a4e | 1360 | return FALSE; |
bffbf940 JJ |
1361 | } |
1362 | } | |
1363 | ||
1364 | if (old_tls_type != tls_type) | |
1365 | { | |
1366 | if (h != NULL) | |
1367 | elf64_x86_64_hash_entry (h)->tls_type = tls_type; | |
1368 | else | |
1369 | elf64_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1370 | } | |
1371 | } | |
c434dee6 AJ |
1372 | /* Fall through */ |
1373 | ||
d6ab8113 JB |
1374 | case R_X86_64_GOTOFF64: |
1375 | case R_X86_64_GOTPC32: | |
7b81dfbb | 1376 | case R_X86_64_GOTPC64: |
bffbf940 | 1377 | create_got: |
6de2ae4a | 1378 | if (htab->elf.sgot == NULL) |
c434dee6 AJ |
1379 | { |
1380 | if (htab->elf.dynobj == NULL) | |
1381 | htab->elf.dynobj = abfd; | |
6de2ae4a L |
1382 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, |
1383 | info)) | |
c2e61a4e | 1384 | return FALSE; |
c434dee6 | 1385 | } |
70256ad8 AJ |
1386 | break; |
1387 | ||
1388 | case R_X86_64_PLT32: | |
1389 | /* This symbol requires a procedure linkage table entry. We | |
407443a3 AJ |
1390 | actually build the entry in adjust_dynamic_symbol, |
1391 | because this might be a case of linking PIC code which is | |
1392 | never referenced by a dynamic object, in which case we | |
1393 | don't need to generate a procedure linkage table entry | |
1394 | after all. */ | |
70256ad8 AJ |
1395 | |
1396 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 1397 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
1398 | if (h == NULL) |
1399 | continue; | |
1400 | ||
f5385ebf | 1401 | h->needs_plt = 1; |
51b64d56 | 1402 | h->plt.refcount += 1; |
70256ad8 AJ |
1403 | break; |
1404 | ||
7b81dfbb AJ |
1405 | case R_X86_64_PLTOFF64: |
1406 | /* This tries to form the 'address' of a function relative | |
1407 | to GOT. For global symbols we need a PLT entry. */ | |
1408 | if (h != NULL) | |
1409 | { | |
1410 | h->needs_plt = 1; | |
1411 | h->plt.refcount += 1; | |
1412 | } | |
1413 | goto create_got; | |
1414 | ||
cc78d0af AJ |
1415 | case R_X86_64_8: |
1416 | case R_X86_64_16: | |
70256ad8 AJ |
1417 | case R_X86_64_32: |
1418 | case R_X86_64_32S: | |
1b71fb54 AJ |
1419 | /* Let's help debug shared library creation. These relocs |
1420 | cannot be used in shared libs. Don't error out for | |
1421 | sections we don't care about, such as debug sections or | |
1422 | non-constant sections. */ | |
1423 | if (info->shared | |
1424 | && (sec->flags & SEC_ALLOC) != 0 | |
1425 | && (sec->flags & SEC_READONLY) != 0) | |
1426 | { | |
09a24cbf | 1427 | if (h) |
4c544807 L |
1428 | name = h->root.root.string; |
1429 | else | |
1430 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1b71fb54 | 1431 | (*_bfd_error_handler) |
d003868e | 1432 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
4c544807 | 1433 | abfd, x86_64_elf_howto_table[r_type].name, name); |
1b71fb54 | 1434 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1435 | return FALSE; |
1b71fb54 AJ |
1436 | } |
1437 | /* Fall through. */ | |
1438 | ||
c434dee6 AJ |
1439 | case R_X86_64_PC8: |
1440 | case R_X86_64_PC16: | |
70256ad8 | 1441 | case R_X86_64_PC32: |
d6ab8113 | 1442 | case R_X86_64_PC64: |
1b71fb54 | 1443 | case R_X86_64_64: |
710ab287 | 1444 | if (h != NULL && info->executable) |
c434dee6 AJ |
1445 | { |
1446 | /* If this reloc is in a read-only section, we might | |
1447 | need a copy reloc. We can't check reliably at this | |
1448 | stage whether the section is read-only, as input | |
1449 | sections have not yet been mapped to output sections. | |
1450 | Tentatively set the flag for now, and correct in | |
1451 | adjust_dynamic_symbol. */ | |
f5385ebf | 1452 | h->non_got_ref = 1; |
c434dee6 AJ |
1453 | |
1454 | /* We may need a .plt entry if the function this reloc | |
1455 | refers to is in a shared lib. */ | |
1456 | h->plt.refcount += 1; | |
d6ab8113 | 1457 | if (r_type != R_X86_64_PC32 && r_type != R_X86_64_PC64) |
f5385ebf | 1458 | h->pointer_equality_needed = 1; |
c434dee6 | 1459 | } |
70256ad8 AJ |
1460 | |
1461 | /* If we are creating a shared library, and this is a reloc | |
1462 | against a global symbol, or a non PC relative reloc | |
1463 | against a local symbol, then we need to copy the reloc | |
1464 | into the shared library. However, if we are linking with | |
1465 | -Bsymbolic, we do not need to copy a reloc against a | |
1466 | global symbol which is defined in an object we are | |
407443a3 | 1467 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
1468 | this point we have not seen all the input files, so it is |
1469 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
1470 | later (it is never cleared). In case of a weak definition, |
1471 | DEF_REGULAR may be cleared later by a strong definition in | |
1472 | a shared library. We account for that possibility below by | |
1473 | storing information in the relocs_copied field of the hash | |
1474 | table entry. A similar situation occurs when creating | |
1475 | shared libraries and symbol visibility changes render the | |
1476 | symbol local. | |
1477 | ||
1478 | If on the other hand, we are creating an executable, we | |
1479 | may need to keep relocations for symbols satisfied by a | |
1480 | dynamic library if we manage to avoid copy relocs for the | |
0f88be7a | 1481 | symbol. */ |
c434dee6 AJ |
1482 | if ((info->shared |
1483 | && (sec->flags & SEC_ALLOC) != 0 | |
d8045f23 | 1484 | && (! IS_X86_64_PCREL_TYPE (r_type) |
c434dee6 | 1485 | || (h != NULL |
55255dae | 1486 | && (! SYMBOLIC_BIND (info, h) |
c434dee6 | 1487 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1488 | || !h->def_regular)))) |
d40d037c AJ |
1489 | || (ELIMINATE_COPY_RELOCS |
1490 | && !info->shared | |
c434dee6 AJ |
1491 | && (sec->flags & SEC_ALLOC) != 0 |
1492 | && h != NULL | |
1493 | && (h->root.type == bfd_link_hash_defweak | |
0f88be7a | 1494 | || !h->def_regular))) |
70256ad8 | 1495 | { |
e03a8ed8 L |
1496 | struct elf_dyn_relocs *p; |
1497 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
1498 | |
1499 | /* We must copy these reloc types into the output file. | |
1500 | Create a reloc section in dynobj and make room for | |
1501 | this reloc. */ | |
70256ad8 AJ |
1502 | if (sreloc == NULL) |
1503 | { | |
c434dee6 AJ |
1504 | if (htab->elf.dynobj == NULL) |
1505 | htab->elf.dynobj = abfd; | |
1506 | ||
83bac4b0 NC |
1507 | sreloc = _bfd_elf_make_dynamic_reloc_section |
1508 | (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE); | |
70256ad8 | 1509 | |
70256ad8 | 1510 | if (sreloc == NULL) |
c2e61a4e | 1511 | return FALSE; |
70256ad8 AJ |
1512 | } |
1513 | ||
c434dee6 AJ |
1514 | /* If this is a global symbol, we count the number of |
1515 | relocations we need for this symbol. */ | |
1516 | if (h != NULL) | |
70256ad8 | 1517 | { |
c434dee6 AJ |
1518 | head = &((struct elf64_x86_64_link_hash_entry *) h)->dyn_relocs; |
1519 | } | |
1520 | else | |
1521 | { | |
1522 | /* Track dynamic relocs needed for local syms too. | |
1523 | We really need local syms available to do this | |
1524 | easily. Oh well. */ | |
c434dee6 | 1525 | asection *s; |
87d72d41 | 1526 | void **vpp; |
87d72d41 AM |
1527 | |
1528 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1529 | abfd, r_symndx); | |
1530 | if (isym == NULL) | |
1531 | return FALSE; | |
1532 | ||
1533 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 1534 | if (s == NULL) |
87d72d41 | 1535 | s = sec; |
70256ad8 | 1536 | |
e81d3500 DD |
1537 | /* Beware of type punned pointers vs strict aliasing |
1538 | rules. */ | |
1539 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 1540 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 1541 | } |
70256ad8 | 1542 | |
c434dee6 AJ |
1543 | p = *head; |
1544 | if (p == NULL || p->sec != sec) | |
1545 | { | |
1546 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 1547 | |
e03a8ed8 | 1548 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 1549 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 1550 | if (p == NULL) |
c2e61a4e | 1551 | return FALSE; |
c434dee6 AJ |
1552 | p->next = *head; |
1553 | *head = p; | |
1554 | p->sec = sec; | |
1555 | p->count = 0; | |
1556 | p->pc_count = 0; | |
70256ad8 | 1557 | } |
c434dee6 AJ |
1558 | |
1559 | p->count += 1; | |
d8045f23 | 1560 | if (IS_X86_64_PCREL_TYPE (r_type)) |
c434dee6 | 1561 | p->pc_count += 1; |
70256ad8 AJ |
1562 | } |
1563 | break; | |
fe4770f4 AJ |
1564 | |
1565 | /* This relocation describes the C++ object vtable hierarchy. | |
1566 | Reconstruct it for later use during GC. */ | |
1567 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 1568 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c2e61a4e | 1569 | return FALSE; |
fe4770f4 AJ |
1570 | break; |
1571 | ||
1572 | /* This relocation describes which C++ vtable entries are actually | |
1573 | used. Record for later use during GC. */ | |
1574 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
1575 | BFD_ASSERT (h != NULL); |
1576 | if (h != NULL | |
1577 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
c2e61a4e | 1578 | return FALSE; |
fe4770f4 | 1579 | break; |
c434dee6 AJ |
1580 | |
1581 | default: | |
1582 | break; | |
70256ad8 AJ |
1583 | } |
1584 | } | |
1585 | ||
b34976b6 | 1586 | return TRUE; |
70256ad8 AJ |
1587 | } |
1588 | ||
1589 | /* Return the section that should be marked against GC for a given | |
407443a3 | 1590 | relocation. */ |
70256ad8 AJ |
1591 | |
1592 | static asection * | |
27482721 | 1593 | elf64_x86_64_gc_mark_hook (asection *sec, |
07adf181 | 1594 | struct bfd_link_info *info, |
27482721 AJ |
1595 | Elf_Internal_Rela *rel, |
1596 | struct elf_link_hash_entry *h, | |
1597 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
1598 | { |
1599 | if (h != NULL) | |
07adf181 AM |
1600 | switch (ELF64_R_TYPE (rel->r_info)) |
1601 | { | |
1602 | case R_X86_64_GNU_VTINHERIT: | |
1603 | case R_X86_64_GNU_VTENTRY: | |
1604 | return NULL; | |
1605 | } | |
1606 | ||
1607 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
1608 | } |
1609 | ||
407443a3 | 1610 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 | 1611 | |
b34976b6 | 1612 | static bfd_boolean |
27482721 | 1613 | elf64_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, |
142411ca L |
1614 | asection *sec, |
1615 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1616 | { |
4dfe6ac6 | 1617 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1618 | Elf_Internal_Shdr *symtab_hdr; |
1619 | struct elf_link_hash_entry **sym_hashes; | |
1620 | bfd_signed_vma *local_got_refcounts; | |
1621 | const Elf_Internal_Rela *rel, *relend; | |
c434dee6 | 1622 | |
7dda2462 TG |
1623 | if (info->relocatable) |
1624 | return TRUE; | |
1625 | ||
4dfe6ac6 NC |
1626 | htab = elf64_x86_64_hash_table (info); |
1627 | if (htab == NULL) | |
1628 | return FALSE; | |
1629 | ||
c434dee6 | 1630 | elf_section_data (sec)->local_dynrel = NULL; |
70256ad8 | 1631 | |
0ffa91dd | 1632 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 AJ |
1633 | sym_hashes = elf_sym_hashes (abfd); |
1634 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1635 | ||
70256ad8 AJ |
1636 | relend = relocs + sec->reloc_count; |
1637 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
1638 | { |
1639 | unsigned long r_symndx; | |
1640 | unsigned int r_type; | |
1641 | struct elf_link_hash_entry *h = NULL; | |
70256ad8 | 1642 | |
26e41594 AM |
1643 | r_symndx = ELF64_R_SYM (rel->r_info); |
1644 | if (r_symndx >= symtab_hdr->sh_info) | |
1645 | { | |
1646 | struct elf64_x86_64_link_hash_entry *eh; | |
e03a8ed8 L |
1647 | struct elf_dyn_relocs **pp; |
1648 | struct elf_dyn_relocs *p; | |
c434dee6 | 1649 | |
26e41594 | 1650 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1651 | while (h->root.type == bfd_link_hash_indirect |
1652 | || h->root.type == bfd_link_hash_warning) | |
1653 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1654 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
c434dee6 | 1655 | |
26e41594 AM |
1656 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1657 | if (p->sec == sec) | |
1658 | { | |
1659 | /* Everything must go for SEC. */ | |
1660 | *pp = p->next; | |
1661 | break; | |
1662 | } | |
1663 | } | |
bb1cb422 L |
1664 | else |
1665 | { | |
1666 | /* A local symbol. */ | |
1667 | Elf_Internal_Sym *isym; | |
1668 | ||
1669 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1670 | abfd, r_symndx); | |
1671 | ||
1672 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
1673 | if (isym != NULL | |
1674 | && ELF64_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) | |
1675 | { | |
1676 | h = elf64_x86_64_get_local_sym_hash (htab, abfd, rel, | |
1677 | FALSE); | |
1678 | if (h == NULL) | |
1679 | abort (); | |
1680 | } | |
1681 | } | |
c434dee6 | 1682 | |
26e41594 | 1683 | r_type = ELF64_R_TYPE (rel->r_info); |
142411ca L |
1684 | if (! elf64_x86_64_tls_transition (info, abfd, sec, NULL, |
1685 | symtab_hdr, sym_hashes, | |
1686 | &r_type, GOT_UNKNOWN, | |
4c544807 | 1687 | rel, relend, h, r_symndx)) |
142411ca L |
1688 | return FALSE; |
1689 | ||
26e41594 AM |
1690 | switch (r_type) |
1691 | { | |
1692 | case R_X86_64_TLSLD: | |
4dfe6ac6 NC |
1693 | if (htab->tls_ld_got.refcount > 0) |
1694 | htab->tls_ld_got.refcount -= 1; | |
26e41594 | 1695 | break; |
c434dee6 | 1696 | |
26e41594 | 1697 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
1698 | case R_X86_64_GOTPC32_TLSDESC: |
1699 | case R_X86_64_TLSDESC_CALL: | |
26e41594 AM |
1700 | case R_X86_64_GOTTPOFF: |
1701 | case R_X86_64_GOT32: | |
1702 | case R_X86_64_GOTPCREL: | |
7b81dfbb AJ |
1703 | case R_X86_64_GOT64: |
1704 | case R_X86_64_GOTPCREL64: | |
1705 | case R_X86_64_GOTPLT64: | |
26e41594 AM |
1706 | if (h != NULL) |
1707 | { | |
7b81dfbb AJ |
1708 | if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0) |
1709 | h->plt.refcount -= 1; | |
26e41594 AM |
1710 | if (h->got.refcount > 0) |
1711 | h->got.refcount -= 1; | |
bb1cb422 L |
1712 | if (h->type == STT_GNU_IFUNC) |
1713 | { | |
1714 | if (h->plt.refcount > 0) | |
1715 | h->plt.refcount -= 1; | |
1716 | } | |
26e41594 AM |
1717 | } |
1718 | else if (local_got_refcounts != NULL) | |
1719 | { | |
1720 | if (local_got_refcounts[r_symndx] > 0) | |
1721 | local_got_refcounts[r_symndx] -= 1; | |
1722 | } | |
1723 | break; | |
c434dee6 | 1724 | |
26e41594 AM |
1725 | case R_X86_64_8: |
1726 | case R_X86_64_16: | |
1727 | case R_X86_64_32: | |
1728 | case R_X86_64_64: | |
1729 | case R_X86_64_32S: | |
1730 | case R_X86_64_PC8: | |
1731 | case R_X86_64_PC16: | |
1732 | case R_X86_64_PC32: | |
d6ab8113 | 1733 | case R_X86_64_PC64: |
26e41594 AM |
1734 | if (info->shared) |
1735 | break; | |
1736 | /* Fall thru */ | |
c434dee6 | 1737 | |
26e41594 | 1738 | case R_X86_64_PLT32: |
7b81dfbb | 1739 | case R_X86_64_PLTOFF64: |
26e41594 AM |
1740 | if (h != NULL) |
1741 | { | |
1742 | if (h->plt.refcount > 0) | |
1743 | h->plt.refcount -= 1; | |
1744 | } | |
1745 | break; | |
70256ad8 | 1746 | |
26e41594 AM |
1747 | default: |
1748 | break; | |
1749 | } | |
1750 | } | |
70256ad8 | 1751 | |
b34976b6 | 1752 | return TRUE; |
70256ad8 AJ |
1753 | } |
1754 | ||
1755 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1756 | regular object. The current definition is in some section of the | |
1757 | dynamic object, but we're not including those sections. We have to | |
1758 | change the definition to something the rest of the link can | |
407443a3 | 1759 | understand. */ |
70256ad8 | 1760 | |
b34976b6 | 1761 | static bfd_boolean |
27482721 AJ |
1762 | elf64_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
1763 | struct elf_link_hash_entry *h) | |
70256ad8 | 1764 | { |
c434dee6 | 1765 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 | 1766 | asection *s; |
70256ad8 | 1767 | |
cbe950e9 L |
1768 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
1769 | if (h->type == STT_GNU_IFUNC) | |
1770 | { | |
1771 | if (h->plt.refcount <= 0) | |
1772 | { | |
1773 | h->plt.offset = (bfd_vma) -1; | |
1774 | h->needs_plt = 0; | |
1775 | } | |
1776 | return TRUE; | |
1777 | } | |
1778 | ||
70256ad8 AJ |
1779 | /* If this is a function, put it in the procedure linkage table. We |
1780 | will fill in the contents of the procedure linkage table later, | |
1781 | when we know the address of the .got section. */ | |
1782 | if (h->type == STT_FUNC | |
f5385ebf | 1783 | || h->needs_plt) |
70256ad8 | 1784 | { |
c434dee6 | 1785 | if (h->plt.refcount <= 0 |
27482721 AJ |
1786 | || SYMBOL_CALLS_LOCAL (info, h) |
1787 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1788 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 1789 | { |
70256ad8 AJ |
1790 | /* This case can occur if we saw a PLT32 reloc in an input |
1791 | file, but the symbol was never referred to by a dynamic | |
1792 | object, or if all references were garbage collected. In | |
1793 | such a case, we don't actually need to build a procedure | |
1794 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 1795 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 1796 | h->needs_plt = 0; |
70256ad8 AJ |
1797 | } |
1798 | ||
b34976b6 | 1799 | return TRUE; |
70256ad8 | 1800 | } |
bbd7ec4a | 1801 | else |
c434dee6 AJ |
1802 | /* It's possible that we incorrectly decided a .plt reloc was |
1803 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
1804 | check_relocs. We can't decide accurately between function and | |
1805 | non-function syms in check-relocs; Objects loaded later in | |
1806 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1807 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
1808 | |
1809 | /* If this is a weak symbol, and there is a real definition, the | |
1810 | processor independent code will have arranged for us to see the | |
407443a3 | 1811 | real definition first, and we can just use the same value. */ |
f6e332e6 | 1812 | if (h->u.weakdef != NULL) |
70256ad8 | 1813 | { |
f6e332e6 AM |
1814 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1815 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1816 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1817 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 1818 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 1819 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 1820 | return TRUE; |
70256ad8 AJ |
1821 | } |
1822 | ||
1823 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 1824 | is not a function. */ |
70256ad8 AJ |
1825 | |
1826 | /* If we are creating a shared library, we must presume that the | |
1827 | only references to the symbol are via the global offset table. | |
1828 | For such cases we need not do anything here; the relocations will | |
407443a3 | 1829 | be handled correctly by relocate_section. */ |
70256ad8 | 1830 | if (info->shared) |
b34976b6 | 1831 | return TRUE; |
70256ad8 AJ |
1832 | |
1833 | /* If there are no references to this symbol that do not use the | |
1834 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 1835 | if (!h->non_got_ref) |
b34976b6 | 1836 | return TRUE; |
70256ad8 | 1837 | |
c434dee6 AJ |
1838 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1839 | if (info->nocopyreloc) | |
1840 | { | |
f5385ebf | 1841 | h->non_got_ref = 0; |
b34976b6 | 1842 | return TRUE; |
c434dee6 AJ |
1843 | } |
1844 | ||
d40d037c | 1845 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 1846 | { |
d40d037c | 1847 | struct elf64_x86_64_link_hash_entry * eh; |
e03a8ed8 | 1848 | struct elf_dyn_relocs *p; |
c434dee6 | 1849 | |
d40d037c AJ |
1850 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
1851 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1852 | { | |
1853 | s = p->sec->output_section; | |
1854 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1855 | break; | |
1856 | } | |
1857 | ||
1858 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1859 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1860 | if (p == NULL) | |
1861 | { | |
f5385ebf | 1862 | h->non_got_ref = 0; |
d40d037c AJ |
1863 | return TRUE; |
1864 | } | |
c434dee6 AJ |
1865 | } |
1866 | ||
909272ee AM |
1867 | if (h->size == 0) |
1868 | { | |
1869 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), | |
1870 | h->root.root.string); | |
1871 | return TRUE; | |
1872 | } | |
1873 | ||
70256ad8 | 1874 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 1875 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
1876 | an entry for this symbol in the .dynsym section. The dynamic |
1877 | object will contain position independent code, so all references | |
1878 | from the dynamic object to this symbol will go through the global | |
1879 | offset table. The dynamic linker will use the .dynsym entry to | |
1880 | determine the address it must put in the global offset table, so | |
1881 | both the dynamic object and the regular object will refer to the | |
1882 | same memory location for the variable. */ | |
1883 | ||
c434dee6 | 1884 | htab = elf64_x86_64_hash_table (info); |
4dfe6ac6 NC |
1885 | if (htab == NULL) |
1886 | return FALSE; | |
70256ad8 AJ |
1887 | |
1888 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
1889 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 1890 | runtime process image. */ |
70256ad8 AJ |
1891 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1892 | { | |
eea6121a | 1893 | htab->srelbss->size += sizeof (Elf64_External_Rela); |
f5385ebf | 1894 | h->needs_copy = 1; |
70256ad8 AJ |
1895 | } |
1896 | ||
c434dee6 | 1897 | s = htab->sdynbss; |
70256ad8 | 1898 | |
027297b7 | 1899 | return _bfd_elf_adjust_dynamic_copy (h, s); |
70256ad8 AJ |
1900 | } |
1901 | ||
c434dee6 AJ |
1902 | /* Allocate space in .plt, .got and associated reloc sections for |
1903 | dynamic relocs. */ | |
1904 | ||
b34976b6 | 1905 | static bfd_boolean |
eb4ff4d6 | 1906 | elf64_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
1907 | { |
1908 | struct bfd_link_info *info; | |
1909 | struct elf64_x86_64_link_hash_table *htab; | |
1910 | struct elf64_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 1911 | struct elf_dyn_relocs *p; |
c434dee6 | 1912 | |
e92d460e | 1913 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1914 | return TRUE; |
c434dee6 | 1915 | |
e92d460e AM |
1916 | if (h->root.type == bfd_link_hash_warning) |
1917 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
cbe950e9 | 1918 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
e92d460e | 1919 | |
c434dee6 AJ |
1920 | info = (struct bfd_link_info *) inf; |
1921 | htab = elf64_x86_64_hash_table (info); | |
4dfe6ac6 NC |
1922 | if (htab == NULL) |
1923 | return FALSE; | |
c434dee6 | 1924 | |
cbe950e9 L |
1925 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
1926 | here if it is defined and referenced in a non-shared object. */ | |
1927 | if (h->type == STT_GNU_IFUNC | |
1928 | && h->def_regular) | |
e03a8ed8 L |
1929 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, |
1930 | &eh->dyn_relocs, | |
1931 | PLT_ENTRY_SIZE, | |
1932 | GOT_ENTRY_SIZE); | |
cbe950e9 L |
1933 | else if (htab->elf.dynamic_sections_created |
1934 | && h->plt.refcount > 0) | |
c434dee6 AJ |
1935 | { |
1936 | /* Make sure this symbol is output as a dynamic symbol. | |
1937 | Undefined weak syms won't yet be marked as dynamic. */ | |
1938 | if (h->dynindx == -1 | |
f5385ebf | 1939 | && !h->forced_local) |
c434dee6 | 1940 | { |
c152c796 | 1941 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1942 | return FALSE; |
c434dee6 AJ |
1943 | } |
1944 | ||
27482721 AJ |
1945 | if (info->shared |
1946 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
c434dee6 | 1947 | { |
6de2ae4a | 1948 | asection *s = htab->elf.splt; |
c434dee6 AJ |
1949 | |
1950 | /* If this is the first .plt entry, make room for the special | |
1951 | first entry. */ | |
eea6121a AM |
1952 | if (s->size == 0) |
1953 | s->size += PLT_ENTRY_SIZE; | |
c434dee6 | 1954 | |
eea6121a | 1955 | h->plt.offset = s->size; |
c434dee6 AJ |
1956 | |
1957 | /* If this symbol is not defined in a regular file, and we are | |
1958 | not generating a shared library, then set the symbol to this | |
1959 | location in the .plt. This is required to make function | |
1960 | pointers compare as equal between the normal executable and | |
1961 | the shared library. */ | |
1962 | if (! info->shared | |
f5385ebf | 1963 | && !h->def_regular) |
c434dee6 AJ |
1964 | { |
1965 | h->root.u.def.section = s; | |
1966 | h->root.u.def.value = h->plt.offset; | |
1967 | } | |
1968 | ||
1969 | /* Make room for this entry. */ | |
eea6121a | 1970 | s->size += PLT_ENTRY_SIZE; |
c434dee6 AJ |
1971 | |
1972 | /* We also need to make an entry in the .got.plt section, which | |
1973 | will be placed in the .got section by the linker script. */ | |
6de2ae4a | 1974 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; |
c434dee6 AJ |
1975 | |
1976 | /* We also need to make an entry in the .rela.plt section. */ | |
6de2ae4a L |
1977 | htab->elf.srelplt->size += sizeof (Elf64_External_Rela); |
1978 | htab->elf.srelplt->reloc_count++; | |
c434dee6 AJ |
1979 | } |
1980 | else | |
1981 | { | |
1982 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1983 | h->needs_plt = 0; |
c434dee6 AJ |
1984 | } |
1985 | } | |
1986 | else | |
1987 | { | |
1988 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1989 | h->needs_plt = 0; |
c434dee6 AJ |
1990 | } |
1991 | ||
67a4f2b7 AO |
1992 | eh->tlsdesc_got = (bfd_vma) -1; |
1993 | ||
bffbf940 JJ |
1994 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
1995 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
1996 | if (h->got.refcount > 0 | |
1d85728f | 1997 | && info->executable |
bffbf940 JJ |
1998 | && h->dynindx == -1 |
1999 | && elf64_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) | |
d8045f23 NC |
2000 | { |
2001 | h->got.offset = (bfd_vma) -1; | |
2002 | } | |
bffbf940 | 2003 | else if (h->got.refcount > 0) |
c434dee6 AJ |
2004 | { |
2005 | asection *s; | |
b34976b6 | 2006 | bfd_boolean dyn; |
bffbf940 | 2007 | int tls_type = elf64_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
2008 | |
2009 | /* Make sure this symbol is output as a dynamic symbol. | |
2010 | Undefined weak syms won't yet be marked as dynamic. */ | |
2011 | if (h->dynindx == -1 | |
f5385ebf | 2012 | && !h->forced_local) |
c434dee6 | 2013 | { |
c152c796 | 2014 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2015 | return FALSE; |
c434dee6 AJ |
2016 | } |
2017 | ||
67a4f2b7 AO |
2018 | if (GOT_TLS_GDESC_P (tls_type)) |
2019 | { | |
6de2ae4a | 2020 | eh->tlsdesc_got = htab->elf.sgotplt->size |
67a4f2b7 | 2021 | - elf64_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2022 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2023 | h->got.offset = (bfd_vma) -2; |
2024 | } | |
2025 | if (! GOT_TLS_GDESC_P (tls_type) | |
2026 | || GOT_TLS_GD_P (tls_type)) | |
2027 | { | |
6de2ae4a | 2028 | s = htab->elf.sgot; |
67a4f2b7 AO |
2029 | h->got.offset = s->size; |
2030 | s->size += GOT_ENTRY_SIZE; | |
2031 | if (GOT_TLS_GD_P (tls_type)) | |
2032 | s->size += GOT_ENTRY_SIZE; | |
2033 | } | |
c434dee6 | 2034 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 JJ |
2035 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
2036 | and two if global. | |
2037 | R_X86_64_GOTTPOFF needs one dynamic relocation. */ | |
67a4f2b7 | 2038 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 2039 | || tls_type == GOT_TLS_IE) |
6de2ae4a | 2040 | htab->elf.srelgot->size += sizeof (Elf64_External_Rela); |
67a4f2b7 | 2041 | else if (GOT_TLS_GD_P (tls_type)) |
6de2ae4a | 2042 | htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela); |
67a4f2b7 AO |
2043 | else if (! GOT_TLS_GDESC_P (tls_type) |
2044 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2045 | || h->root.type != bfd_link_hash_undefweak) | |
27482721 AJ |
2046 | && (info->shared |
2047 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
6de2ae4a | 2048 | htab->elf.srelgot->size += sizeof (Elf64_External_Rela); |
67a4f2b7 AO |
2049 | if (GOT_TLS_GDESC_P (tls_type)) |
2050 | { | |
6de2ae4a | 2051 | htab->elf.srelplt->size += sizeof (Elf64_External_Rela); |
67a4f2b7 AO |
2052 | htab->tlsdesc_plt = (bfd_vma) -1; |
2053 | } | |
c434dee6 AJ |
2054 | } |
2055 | else | |
2056 | h->got.offset = (bfd_vma) -1; | |
2057 | ||
c434dee6 | 2058 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2059 | return TRUE; |
c434dee6 AJ |
2060 | |
2061 | /* In the shared -Bsymbolic case, discard space allocated for | |
2062 | dynamic pc-relative relocs against symbols which turn out to be | |
2063 | defined in regular objects. For the normal shared case, discard | |
2064 | space for pc-relative relocs that have become local due to symbol | |
2065 | visibility changes. */ | |
2066 | ||
2067 | if (info->shared) | |
2068 | { | |
27482721 AJ |
2069 | /* Relocs that use pc_count are those that appear on a call |
2070 | insn, or certain REL relocs that can generated via assembly. | |
2071 | We want calls to protected symbols to resolve directly to the | |
2072 | function rather than going via the plt. If people want | |
2073 | function pointer comparisons to work as expected then they | |
2074 | should avoid writing weird assembly. */ | |
2075 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 2076 | { |
e03a8ed8 | 2077 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
2078 | |
2079 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2080 | { | |
2081 | p->count -= p->pc_count; | |
2082 | p->pc_count = 0; | |
2083 | if (p->count == 0) | |
2084 | *pp = p->next; | |
2085 | else | |
2086 | pp = &p->next; | |
2087 | } | |
2088 | } | |
4e795f50 AM |
2089 | |
2090 | /* Also discard relocs on undefined weak syms with non-default | |
2091 | visibility. */ | |
22d606e9 | 2092 | if (eh->dyn_relocs != NULL |
4e795f50 | 2093 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
2094 | { |
2095 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2096 | eh->dyn_relocs = NULL; | |
2097 | ||
2098 | /* Make sure undefined weak symbols are output as a dynamic | |
2099 | symbol in PIEs. */ | |
2100 | else if (h->dynindx == -1 | |
d8045f23 NC |
2101 | && ! h->forced_local |
2102 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2103 | return FALSE; | |
22d606e9 | 2104 | } |
cbe950e9 | 2105 | |
d8045f23 | 2106 | } |
d40d037c | 2107 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
2108 | { |
2109 | /* For the non-shared case, discard space for relocs against | |
2110 | symbols which turn out to need copy relocs or are not | |
2111 | dynamic. */ | |
2112 | ||
f5385ebf AM |
2113 | if (!h->non_got_ref |
2114 | && ((h->def_dynamic | |
2115 | && !h->def_regular) | |
c434dee6 AJ |
2116 | || (htab->elf.dynamic_sections_created |
2117 | && (h->root.type == bfd_link_hash_undefweak | |
2118 | || h->root.type == bfd_link_hash_undefined)))) | |
2119 | { | |
2120 | /* Make sure this symbol is output as a dynamic symbol. | |
2121 | Undefined weak syms won't yet be marked as dynamic. */ | |
2122 | if (h->dynindx == -1 | |
d8045f23 NC |
2123 | && ! h->forced_local |
2124 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2125 | return FALSE; | |
c434dee6 AJ |
2126 | |
2127 | /* If that succeeded, we know we'll be keeping all the | |
2128 | relocs. */ | |
2129 | if (h->dynindx != -1) | |
2130 | goto keep; | |
2131 | } | |
2132 | ||
2133 | eh->dyn_relocs = NULL; | |
2134 | ||
2135 | keep: ; | |
2136 | } | |
2137 | ||
2138 | /* Finally, allocate space. */ | |
2139 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2140 | { | |
e7c33416 NC |
2141 | asection * sreloc; |
2142 | ||
cbe950e9 | 2143 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2144 | |
2145 | BFD_ASSERT (sreloc != NULL); | |
2146 | ||
eea6121a | 2147 | sreloc->size += p->count * sizeof (Elf64_External_Rela); |
c434dee6 AJ |
2148 | } |
2149 | ||
b34976b6 | 2150 | return TRUE; |
c434dee6 AJ |
2151 | } |
2152 | ||
c25bc9fc L |
2153 | /* Allocate space in .plt, .got and associated reloc sections for |
2154 | local dynamic relocs. */ | |
2155 | ||
2156 | static bfd_boolean | |
2157 | elf64_x86_64_allocate_local_dynrelocs (void **slot, void *inf) | |
2158 | { | |
2159 | struct elf_link_hash_entry *h | |
2160 | = (struct elf_link_hash_entry *) *slot; | |
2161 | ||
2162 | if (h->type != STT_GNU_IFUNC | |
2163 | || !h->def_regular | |
2164 | || !h->ref_regular | |
2165 | || !h->forced_local | |
2166 | || h->root.type != bfd_link_hash_defined) | |
2167 | abort (); | |
2168 | ||
2169 | return elf64_x86_64_allocate_dynrelocs (h, inf); | |
2170 | } | |
2171 | ||
c434dee6 AJ |
2172 | /* Find any dynamic relocs that apply to read-only sections. */ |
2173 | ||
b34976b6 | 2174 | static bfd_boolean |
eb4ff4d6 | 2175 | elf64_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
2176 | { |
2177 | struct elf64_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 2178 | struct elf_dyn_relocs *p; |
c434dee6 | 2179 | |
e92d460e AM |
2180 | if (h->root.type == bfd_link_hash_warning) |
2181 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2182 | ||
c434dee6 AJ |
2183 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
2184 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2185 | { | |
2186 | asection *s = p->sec->output_section; | |
2187 | ||
2188 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2189 | { | |
2190 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2191 | ||
2192 | info->flags |= DF_TEXTREL; | |
2193 | ||
2194 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 2195 | return FALSE; |
c434dee6 AJ |
2196 | } |
2197 | } | |
b34976b6 | 2198 | return TRUE; |
c434dee6 AJ |
2199 | } |
2200 | ||
70256ad8 AJ |
2201 | /* Set the sizes of the dynamic sections. */ |
2202 | ||
b34976b6 | 2203 | static bfd_boolean |
27482721 AJ |
2204 | elf64_x86_64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
2205 | struct bfd_link_info *info) | |
70256ad8 | 2206 | { |
c434dee6 | 2207 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2208 | bfd *dynobj; |
2209 | asection *s; | |
b34976b6 | 2210 | bfd_boolean relocs; |
c434dee6 | 2211 | bfd *ibfd; |
70256ad8 | 2212 | |
c434dee6 | 2213 | htab = elf64_x86_64_hash_table (info); |
4dfe6ac6 NC |
2214 | if (htab == NULL) |
2215 | return FALSE; | |
2216 | ||
c434dee6 AJ |
2217 | dynobj = htab->elf.dynobj; |
2218 | if (dynobj == NULL) | |
2219 | abort (); | |
70256ad8 | 2220 | |
c434dee6 | 2221 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
2222 | { |
2223 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 2224 | if (info->executable) |
70256ad8 AJ |
2225 | { |
2226 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
c434dee6 AJ |
2227 | if (s == NULL) |
2228 | abort (); | |
eea6121a | 2229 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
70256ad8 AJ |
2230 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
2231 | } | |
2232 | } | |
70256ad8 | 2233 | |
c434dee6 AJ |
2234 | /* Set up .got offsets for local syms, and space for local dynamic |
2235 | relocs. */ | |
2236 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
70256ad8 | 2237 | { |
c434dee6 AJ |
2238 | bfd_signed_vma *local_got; |
2239 | bfd_signed_vma *end_local_got; | |
bffbf940 | 2240 | char *local_tls_type; |
67a4f2b7 | 2241 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
2242 | bfd_size_type locsymcount; |
2243 | Elf_Internal_Shdr *symtab_hdr; | |
2244 | asection *srel; | |
70256ad8 | 2245 | |
0ffa91dd | 2246 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
2247 | continue; |
2248 | ||
c434dee6 | 2249 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 2250 | { |
e03a8ed8 | 2251 | struct elf_dyn_relocs *p; |
c434dee6 | 2252 | |
e03a8ed8 | 2253 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 2254 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
2255 | p != NULL; |
2256 | p = p->next) | |
70256ad8 | 2257 | { |
c434dee6 AJ |
2258 | if (!bfd_is_abs_section (p->sec) |
2259 | && bfd_is_abs_section (p->sec->output_section)) | |
2260 | { | |
2261 | /* Input section has been discarded, either because | |
2262 | it is a copy of a linkonce section or due to | |
2263 | linker script /DISCARD/, so we'll be discarding | |
2264 | the relocs too. */ | |
2265 | } | |
2266 | else if (p->count != 0) | |
2267 | { | |
2268 | srel = elf_section_data (p->sec)->sreloc; | |
eea6121a | 2269 | srel->size += p->count * sizeof (Elf64_External_Rela); |
c434dee6 AJ |
2270 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
2271 | info->flags |= DF_TEXTREL; | |
c434dee6 | 2272 | } |
70256ad8 AJ |
2273 | } |
2274 | } | |
c434dee6 AJ |
2275 | |
2276 | local_got = elf_local_got_refcounts (ibfd); | |
2277 | if (!local_got) | |
2278 | continue; | |
2279 | ||
0ffa91dd | 2280 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
2281 | locsymcount = symtab_hdr->sh_info; |
2282 | end_local_got = local_got + locsymcount; | |
bffbf940 | 2283 | local_tls_type = elf64_x86_64_local_got_tls_type (ibfd); |
67a4f2b7 | 2284 | local_tlsdesc_gotent = elf64_x86_64_local_tlsdesc_gotent (ibfd); |
6de2ae4a L |
2285 | s = htab->elf.sgot; |
2286 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
2287 | for (; local_got < end_local_got; |
2288 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 2289 | { |
67a4f2b7 | 2290 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 2291 | if (*local_got > 0) |
70256ad8 | 2292 | { |
67a4f2b7 AO |
2293 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
2294 | { | |
6de2ae4a | 2295 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
67a4f2b7 | 2296 | - elf64_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2297 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2298 | *local_got = (bfd_vma) -2; |
2299 | } | |
2300 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2301 | || GOT_TLS_GD_P (*local_tls_type)) | |
2302 | { | |
2303 | *local_got = s->size; | |
2304 | s->size += GOT_ENTRY_SIZE; | |
2305 | if (GOT_TLS_GD_P (*local_tls_type)) | |
2306 | s->size += GOT_ENTRY_SIZE; | |
2307 | } | |
bffbf940 | 2308 | if (info->shared |
67a4f2b7 | 2309 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 2310 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
2311 | { |
2312 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
2313 | { | |
6de2ae4a L |
2314 | htab->elf.srelplt->size |
2315 | += sizeof (Elf64_External_Rela); | |
67a4f2b7 AO |
2316 | htab->tlsdesc_plt = (bfd_vma) -1; |
2317 | } | |
2318 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2319 | || GOT_TLS_GD_P (*local_tls_type)) | |
2320 | srel->size += sizeof (Elf64_External_Rela); | |
2321 | } | |
70256ad8 AJ |
2322 | } |
2323 | else | |
c434dee6 AJ |
2324 | *local_got = (bfd_vma) -1; |
2325 | } | |
2326 | } | |
70256ad8 | 2327 | |
bffbf940 JJ |
2328 | if (htab->tls_ld_got.refcount > 0) |
2329 | { | |
2330 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
2331 | relocs. */ | |
6de2ae4a L |
2332 | htab->tls_ld_got.offset = htab->elf.sgot->size; |
2333 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; | |
2334 | htab->elf.srelgot->size += sizeof (Elf64_External_Rela); | |
bffbf940 JJ |
2335 | } |
2336 | else | |
2337 | htab->tls_ld_got.offset = -1; | |
2338 | ||
c434dee6 AJ |
2339 | /* Allocate global sym .plt and .got entries, and space for global |
2340 | sym dynamic relocs. */ | |
eb4ff4d6 L |
2341 | elf_link_hash_traverse (&htab->elf, elf64_x86_64_allocate_dynrelocs, |
2342 | info); | |
c434dee6 | 2343 | |
c25bc9fc L |
2344 | /* Allocate .plt and .got entries, and space for local symbols. */ |
2345 | htab_traverse (htab->loc_hash_table, | |
2346 | elf64_x86_64_allocate_local_dynrelocs, | |
2347 | info); | |
2348 | ||
67a4f2b7 AO |
2349 | /* For every jump slot reserved in the sgotplt, reloc_count is |
2350 | incremented. However, when we reserve space for TLS descriptors, | |
2351 | it's not incremented, so in order to compute the space reserved | |
2352 | for them, it suffices to multiply the reloc count by the jump | |
2353 | slot size. */ | |
6de2ae4a | 2354 | if (htab->elf.srelplt) |
67a4f2b7 AO |
2355 | htab->sgotplt_jump_table_size |
2356 | = elf64_x86_64_compute_jump_table_size (htab); | |
2357 | ||
2358 | if (htab->tlsdesc_plt) | |
2359 | { | |
2360 | /* If we're not using lazy TLS relocations, don't generate the | |
2361 | PLT and GOT entries they require. */ | |
2362 | if ((info->flags & DF_BIND_NOW)) | |
2363 | htab->tlsdesc_plt = 0; | |
2364 | else | |
2365 | { | |
6de2ae4a L |
2366 | htab->tlsdesc_got = htab->elf.sgot->size; |
2367 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
2368 | /* Reserve room for the initial entry. |
2369 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a L |
2370 | if (htab->elf.splt->size == 0) |
2371 | htab->elf.splt->size += PLT_ENTRY_SIZE; | |
2372 | htab->tlsdesc_plt = htab->elf.splt->size; | |
2373 | htab->elf.splt->size += PLT_ENTRY_SIZE; | |
67a4f2b7 AO |
2374 | } |
2375 | } | |
2376 | ||
a7b16ceb L |
2377 | if (htab->elf.sgotplt) |
2378 | { | |
2379 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
2380 | entries. */ | |
2381 | if ((htab->elf.sgotplt->size | |
2382 | == get_elf_backend_data (output_bfd)->got_header_size) | |
2383 | && (htab->elf.splt == NULL | |
2384 | || htab->elf.splt->size == 0) | |
2385 | && (htab->elf.sgot == NULL | |
2386 | || htab->elf.sgot->size == 0) | |
2387 | && (htab->elf.iplt == NULL | |
2388 | || htab->elf.iplt->size == 0) | |
2389 | && (htab->elf.igotplt == NULL | |
2390 | || htab->elf.igotplt->size == 0)) | |
2391 | htab->elf.sgotplt->size = 0; | |
2392 | } | |
2393 | ||
c434dee6 AJ |
2394 | /* We now have determined the sizes of the various dynamic sections. |
2395 | Allocate memory for them. */ | |
b34976b6 | 2396 | relocs = FALSE; |
c434dee6 AJ |
2397 | for (s = dynobj->sections; s != NULL; s = s->next) |
2398 | { | |
2399 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2400 | continue; | |
2401 | ||
6de2ae4a L |
2402 | if (s == htab->elf.splt |
2403 | || s == htab->elf.sgot | |
2404 | || s == htab->elf.sgotplt | |
2405 | || s == htab->elf.iplt | |
2406 | || s == htab->elf.igotplt | |
75ff4589 | 2407 | || s == htab->sdynbss) |
c434dee6 AJ |
2408 | { |
2409 | /* Strip this section if we don't need it; see the | |
2410 | comment below. */ | |
2411 | } | |
0112cd26 | 2412 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 2413 | { |
6de2ae4a | 2414 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 2415 | relocs = TRUE; |
c434dee6 AJ |
2416 | |
2417 | /* We use the reloc_count field as a counter if we need | |
2418 | to copy relocs into the output file. */ | |
6de2ae4a | 2419 | if (s != htab->elf.srelplt) |
67a4f2b7 | 2420 | s->reloc_count = 0; |
70256ad8 | 2421 | } |
c434dee6 | 2422 | else |
70256ad8 AJ |
2423 | { |
2424 | /* It's not one of our sections, so don't allocate space. */ | |
2425 | continue; | |
2426 | } | |
2427 | ||
eea6121a | 2428 | if (s->size == 0) |
70256ad8 | 2429 | { |
c434dee6 AJ |
2430 | /* If we don't need this section, strip it from the |
2431 | output file. This is mostly to handle .rela.bss and | |
2432 | .rela.plt. We must create both sections in | |
2433 | create_dynamic_sections, because they must be created | |
2434 | before the linker maps input sections to output | |
2435 | sections. The linker does that before | |
2436 | adjust_dynamic_symbol is called, and it is that | |
2437 | function which decides whether anything needs to go | |
2438 | into these sections. */ | |
2439 | ||
8423293d | 2440 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
2441 | continue; |
2442 | } | |
2443 | ||
c456f082 AM |
2444 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
2445 | continue; | |
2446 | ||
70256ad8 AJ |
2447 | /* Allocate memory for the section contents. We use bfd_zalloc |
2448 | here in case unused entries are not reclaimed before the | |
2449 | section's contents are written out. This should not happen, | |
2450 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
2451 | of garbage. */ | |
eea6121a | 2452 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 2453 | if (s->contents == NULL) |
b34976b6 | 2454 | return FALSE; |
70256ad8 AJ |
2455 | } |
2456 | ||
c434dee6 | 2457 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
2458 | { |
2459 | /* Add some entries to the .dynamic section. We fill in the | |
2460 | values later, in elf64_x86_64_finish_dynamic_sections, but we | |
2461 | must add the entries now so that we get the correct size for | |
407443a3 | 2462 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 2463 | dynamic linker and used by the debugger. */ |
dc810e39 | 2464 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 2465 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 2466 | |
36af4a4e | 2467 | if (info->executable) |
70256ad8 | 2468 | { |
dc810e39 | 2469 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2470 | return FALSE; |
70256ad8 AJ |
2471 | } |
2472 | ||
6de2ae4a | 2473 | if (htab->elf.splt->size != 0) |
70256ad8 | 2474 | { |
dc810e39 AM |
2475 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2476 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2477 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2478 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2479 | return FALSE; |
67a4f2b7 AO |
2480 | |
2481 | if (htab->tlsdesc_plt | |
2482 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
2483 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
2484 | return FALSE; | |
70256ad8 AJ |
2485 | } |
2486 | ||
2487 | if (relocs) | |
2488 | { | |
dc810e39 AM |
2489 | if (!add_dynamic_entry (DT_RELA, 0) |
2490 | || !add_dynamic_entry (DT_RELASZ, 0) | |
2491 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
b34976b6 | 2492 | return FALSE; |
70256ad8 | 2493 | |
c434dee6 AJ |
2494 | /* If any dynamic relocs apply to a read-only section, |
2495 | then we need a DT_TEXTREL entry. */ | |
2496 | if ((info->flags & DF_TEXTREL) == 0) | |
eb4ff4d6 L |
2497 | elf_link_hash_traverse (&htab->elf, |
2498 | elf64_x86_64_readonly_dynrelocs, | |
2499 | info); | |
c434dee6 AJ |
2500 | |
2501 | if ((info->flags & DF_TEXTREL) != 0) | |
2502 | { | |
2503 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 2504 | return FALSE; |
c434dee6 | 2505 | } |
70256ad8 AJ |
2506 | } |
2507 | } | |
dc810e39 | 2508 | #undef add_dynamic_entry |
70256ad8 | 2509 | |
b34976b6 | 2510 | return TRUE; |
70256ad8 AJ |
2511 | } |
2512 | ||
67a4f2b7 AO |
2513 | static bfd_boolean |
2514 | elf64_x86_64_always_size_sections (bfd *output_bfd, | |
2515 | struct bfd_link_info *info) | |
2516 | { | |
2517 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
2518 | ||
2519 | if (tls_sec) | |
2520 | { | |
2521 | struct elf_link_hash_entry *tlsbase; | |
2522 | ||
2523 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
2524 | "_TLS_MODULE_BASE_", | |
2525 | FALSE, FALSE, FALSE); | |
2526 | ||
2527 | if (tlsbase && tlsbase->type == STT_TLS) | |
2528 | { | |
4dfe6ac6 | 2529 | struct elf64_x86_64_link_hash_table *htab; |
67a4f2b7 AO |
2530 | struct bfd_link_hash_entry *bh = NULL; |
2531 | const struct elf_backend_data *bed | |
2532 | = get_elf_backend_data (output_bfd); | |
2533 | ||
4dfe6ac6 NC |
2534 | htab = elf64_x86_64_hash_table (info); |
2535 | if (htab == NULL) | |
2536 | return FALSE; | |
2537 | ||
67a4f2b7 AO |
2538 | if (!(_bfd_generic_link_add_one_symbol |
2539 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
2540 | tls_sec, 0, NULL, FALSE, | |
2541 | bed->collect, &bh))) | |
2542 | return FALSE; | |
9f03412a | 2543 | |
4dfe6ac6 | 2544 | htab->tls_module_base = bh; |
9f03412a | 2545 | |
67a4f2b7 AO |
2546 | tlsbase = (struct elf_link_hash_entry *)bh; |
2547 | tlsbase->def_regular = 1; | |
2548 | tlsbase->other = STV_HIDDEN; | |
2549 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
2550 | } | |
2551 | } | |
2552 | ||
2553 | return TRUE; | |
2554 | } | |
2555 | ||
9f03412a AO |
2556 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
2557 | executables. Rather than setting it to the beginning of the TLS | |
2558 | section, we have to set it to the end. This function may be called | |
2559 | multiple times, it is idempotent. */ | |
2560 | ||
2561 | static void | |
eb4ff4d6 | 2562 | elf64_x86_64_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 2563 | { |
4dfe6ac6 | 2564 | struct elf64_x86_64_link_hash_table *htab; |
9f03412a AO |
2565 | struct bfd_link_hash_entry *base; |
2566 | ||
2567 | if (!info->executable) | |
2568 | return; | |
2569 | ||
4dfe6ac6 NC |
2570 | htab = elf64_x86_64_hash_table (info); |
2571 | if (htab == NULL) | |
2572 | return; | |
9f03412a | 2573 | |
4dfe6ac6 NC |
2574 | base = htab->tls_module_base; |
2575 | if (base == NULL) | |
9f03412a AO |
2576 | return; |
2577 | ||
4dfe6ac6 | 2578 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
2579 | } |
2580 | ||
bffbf940 JJ |
2581 | /* Return the base VMA address which should be subtracted from real addresses |
2582 | when resolving @dtpoff relocation. | |
2583 | This is PT_TLS segment p_vaddr. */ | |
2584 | ||
2585 | static bfd_vma | |
eb4ff4d6 | 2586 | elf64_x86_64_dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 2587 | { |
e1918d23 AM |
2588 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2589 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 2590 | return 0; |
e1918d23 | 2591 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
2592 | } |
2593 | ||
2594 | /* Return the relocation value for @tpoff relocation | |
2595 | if STT_TLS virtual address is ADDRESS. */ | |
2596 | ||
2597 | static bfd_vma | |
eb4ff4d6 | 2598 | elf64_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 2599 | { |
e1918d23 | 2600 | struct elf_link_hash_table *htab = elf_hash_table (info); |
bffbf940 JJ |
2601 | |
2602 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 2603 | if (htab->tls_sec == NULL) |
bffbf940 | 2604 | return 0; |
e1918d23 | 2605 | return address - htab->tls_size - htab->tls_sec->vma; |
bffbf940 JJ |
2606 | } |
2607 | ||
90f487df L |
2608 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
2609 | branch? */ | |
2610 | ||
2611 | static bfd_boolean | |
2612 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
2613 | { | |
2614 | /* Opcode Instruction | |
2615 | 0xe8 call | |
2616 | 0xe9 jump | |
2617 | 0x0f 0x8x conditional jump */ | |
2618 | return ((offset > 0 | |
2619 | && (contents [offset - 1] == 0xe8 | |
2620 | || contents [offset - 1] == 0xe9)) | |
2621 | || (offset > 1 | |
2622 | && contents [offset - 2] == 0x0f | |
2623 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
2624 | } | |
2625 | ||
464d3bd4 L |
2626 | static void |
2627 | elf64_x86_64_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
2628 | { | |
2629 | bfd_byte *loc = s->contents; | |
2630 | loc += s->reloc_count++ * sizeof (Elf64_External_Rela); | |
2631 | BFD_ASSERT (loc + sizeof (Elf64_External_Rela) | |
2632 | <= s->contents + s->size); | |
2633 | bfd_elf64_swap_reloca_out (abfd, rel, loc); | |
2634 | } | |
2635 | ||
8d88c4ca NC |
2636 | /* Relocate an x86_64 ELF section. */ |
2637 | ||
b34976b6 | 2638 | static bfd_boolean |
27482721 AJ |
2639 | elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info, |
2640 | bfd *input_bfd, asection *input_section, | |
2641 | bfd_byte *contents, Elf_Internal_Rela *relocs, | |
2642 | Elf_Internal_Sym *local_syms, | |
2643 | asection **local_sections) | |
8d88c4ca | 2644 | { |
c434dee6 | 2645 | struct elf64_x86_64_link_hash_table *htab; |
8d88c4ca NC |
2646 | Elf_Internal_Shdr *symtab_hdr; |
2647 | struct elf_link_hash_entry **sym_hashes; | |
2648 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2649 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 2650 | Elf_Internal_Rela *rel; |
8d88c4ca NC |
2651 | Elf_Internal_Rela *relend; |
2652 | ||
0ffa91dd NC |
2653 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
2654 | ||
c434dee6 | 2655 | htab = elf64_x86_64_hash_table (info); |
4dfe6ac6 NC |
2656 | if (htab == NULL) |
2657 | return FALSE; | |
0ffa91dd | 2658 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
2659 | sym_hashes = elf_sym_hashes (input_bfd); |
2660 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
67a4f2b7 | 2661 | local_tlsdesc_gotents = elf64_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 2662 | |
eb4ff4d6 | 2663 | elf64_x86_64_set_tls_module_base (info); |
9f03412a | 2664 | |
c434dee6 | 2665 | rel = relocs; |
8d88c4ca | 2666 | relend = relocs + input_section->reloc_count; |
c434dee6 | 2667 | for (; rel < relend; rel++) |
8d88c4ca | 2668 | { |
bffbf940 | 2669 | unsigned int r_type; |
8d88c4ca NC |
2670 | reloc_howto_type *howto; |
2671 | unsigned long r_symndx; | |
2672 | struct elf_link_hash_entry *h; | |
2673 | Elf_Internal_Sym *sym; | |
2674 | asection *sec; | |
67a4f2b7 | 2675 | bfd_vma off, offplt; |
8d88c4ca | 2676 | bfd_vma relocation; |
b34976b6 | 2677 | bfd_boolean unresolved_reloc; |
8d88c4ca | 2678 | bfd_reloc_status_type r; |
bffbf940 | 2679 | int tls_type; |
cbe950e9 | 2680 | asection *base_got; |
8d88c4ca | 2681 | |
c434dee6 | 2682 | r_type = ELF64_R_TYPE (rel->r_info); |
fe4770f4 AJ |
2683 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
2684 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
2685 | continue; | |
8d88c4ca | 2686 | |
bffbf940 | 2687 | if (r_type >= R_X86_64_max) |
8da6118f KH |
2688 | { |
2689 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2690 | return FALSE; |
8da6118f | 2691 | } |
8d88c4ca | 2692 | |
b491616a | 2693 | howto = x86_64_elf_howto_table + r_type; |
c434dee6 | 2694 | r_symndx = ELF64_R_SYM (rel->r_info); |
8d88c4ca NC |
2695 | h = NULL; |
2696 | sym = NULL; | |
2697 | sec = NULL; | |
b34976b6 | 2698 | unresolved_reloc = FALSE; |
8d88c4ca | 2699 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
2700 | { |
2701 | sym = local_syms + r_symndx; | |
2702 | sec = local_sections[r_symndx]; | |
c434dee6 | 2703 | |
c25bc9fc L |
2704 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
2705 | &sec, rel); | |
2706 | ||
2707 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
1f85278f L |
2708 | if (!info->relocatable |
2709 | && ELF64_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
c25bc9fc L |
2710 | { |
2711 | h = elf64_x86_64_get_local_sym_hash (htab, input_bfd, | |
2712 | rel, FALSE); | |
2713 | if (h == NULL) | |
2714 | abort (); | |
2715 | ||
2716 | /* Set STT_GNU_IFUNC symbol value. */ | |
2717 | h->root.u.def.value = sym->st_value; | |
2718 | h->root.u.def.section = sec; | |
2719 | } | |
8da6118f | 2720 | } |
8d88c4ca | 2721 | else |
8da6118f | 2722 | { |
c9736ba0 | 2723 | bfd_boolean warned ATTRIBUTE_UNUSED; |
c434dee6 | 2724 | |
b2a8e766 AM |
2725 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2726 | r_symndx, symtab_hdr, sym_hashes, | |
2727 | h, sec, relocation, | |
2728 | unresolved_reloc, warned); | |
8da6118f | 2729 | } |
ab96bf03 AM |
2730 | |
2731 | if (sec != NULL && elf_discarded_section (sec)) | |
0672748a L |
2732 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
2733 | rel, relend, howto, contents); | |
ab96bf03 AM |
2734 | |
2735 | if (info->relocatable) | |
2736 | continue; | |
2737 | ||
cbe950e9 L |
2738 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
2739 | it here if it is defined in a non-shared object. */ | |
2740 | if (h != NULL | |
2741 | && h->type == STT_GNU_IFUNC | |
2742 | && h->def_regular) | |
2743 | { | |
2744 | asection *plt; | |
2745 | bfd_vma plt_index; | |
4c544807 | 2746 | const char *name; |
cbe950e9 L |
2747 | |
2748 | if ((input_section->flags & SEC_ALLOC) == 0 | |
2749 | || h->plt.offset == (bfd_vma) -1) | |
2750 | abort (); | |
2751 | ||
2752 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 2753 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
cbe950e9 L |
2754 | relocation = (plt->output_section->vma |
2755 | + plt->output_offset + h->plt.offset); | |
2756 | ||
2757 | switch (r_type) | |
2758 | { | |
2759 | default: | |
4c544807 L |
2760 | if (h->root.root.string) |
2761 | name = h->root.root.string; | |
2762 | else | |
2763 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
2764 | NULL); | |
cbe950e9 L |
2765 | (*_bfd_error_handler) |
2766 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
2767 | "symbol `%s' isn't handled by %s"), input_bfd, | |
2768 | x86_64_elf_howto_table[r_type].name, | |
4c544807 | 2769 | name, __FUNCTION__); |
cbe950e9 L |
2770 | bfd_set_error (bfd_error_bad_value); |
2771 | return FALSE; | |
2772 | ||
2773 | case R_X86_64_32S: | |
710ab287 | 2774 | if (info->shared) |
cbe950e9 | 2775 | abort (); |
710ab287 L |
2776 | goto do_relocation; |
2777 | ||
2778 | case R_X86_64_64: | |
2779 | if (rel->r_addend != 0) | |
2780 | { | |
4c544807 L |
2781 | if (h->root.root.string) |
2782 | name = h->root.root.string; | |
2783 | else | |
2784 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
2785 | sym, NULL); | |
710ab287 L |
2786 | (*_bfd_error_handler) |
2787 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
2788 | "symbol `%s' has non-zero addend: %d"), | |
2789 | input_bfd, x86_64_elf_howto_table[r_type].name, | |
4c544807 | 2790 | name, rel->r_addend); |
710ab287 L |
2791 | bfd_set_error (bfd_error_bad_value); |
2792 | return FALSE; | |
2793 | } | |
2794 | ||
2795 | /* Generate dynamic relcoation only when there is a | |
2796 | non-GOF reference in a shared object. */ | |
2797 | if (info->shared && h->non_got_ref) | |
2798 | { | |
2799 | Elf_Internal_Rela outrel; | |
710ab287 L |
2800 | asection *sreloc; |
2801 | ||
c25bc9fc L |
2802 | /* Need a dynamic relocation to get the real function |
2803 | address. */ | |
710ab287 L |
2804 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
2805 | info, | |
2806 | input_section, | |
2807 | rel->r_offset); | |
2808 | if (outrel.r_offset == (bfd_vma) -1 | |
2809 | || outrel.r_offset == (bfd_vma) -2) | |
2810 | abort (); | |
2811 | ||
2812 | outrel.r_offset += (input_section->output_section->vma | |
2813 | + input_section->output_offset); | |
2814 | ||
2815 | if (h->dynindx == -1 | |
44c4ea11 L |
2816 | || h->forced_local |
2817 | || info->executable) | |
710ab287 L |
2818 | { |
2819 | /* This symbol is resolved locally. */ | |
2820 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_IRELATIVE); | |
2821 | outrel.r_addend = (h->root.u.def.value | |
2822 | + h->root.u.def.section->output_section->vma | |
2823 | + h->root.u.def.section->output_offset); | |
2824 | } | |
2825 | else | |
2826 | { | |
2827 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); | |
2828 | outrel.r_addend = 0; | |
2829 | } | |
2830 | ||
6de2ae4a | 2831 | sreloc = htab->elf.irelifunc; |
464d3bd4 | 2832 | elf64_x86_64_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
2833 | |
2834 | /* If this reloc is against an external symbol, we | |
2835 | do not want to fiddle with the addend. Otherwise, | |
2836 | we need to include the symbol value so that it | |
2837 | becomes an addend for the dynamic reloc. For an | |
2838 | internal symbol, we have updated addend. */ | |
2839 | continue; | |
2840 | } | |
cbe950e9 L |
2841 | |
2842 | case R_X86_64_32: | |
cbe950e9 L |
2843 | case R_X86_64_PC32: |
2844 | case R_X86_64_PC64: | |
2845 | case R_X86_64_PLT32: | |
2846 | goto do_relocation; | |
2847 | ||
2848 | case R_X86_64_GOTPCREL: | |
2849 | case R_X86_64_GOTPCREL64: | |
6de2ae4a | 2850 | base_got = htab->elf.sgot; |
cbe950e9 L |
2851 | off = h->got.offset; |
2852 | ||
7afd84dc | 2853 | if (base_got == NULL) |
cbe950e9 L |
2854 | abort (); |
2855 | ||
7afd84dc | 2856 | if (off == (bfd_vma) -1) |
cbe950e9 | 2857 | { |
7afd84dc L |
2858 | /* We can't use h->got.offset here to save state, or |
2859 | even just remember the offset, as finish_dynamic_symbol | |
2860 | would use that as offset into .got. */ | |
cbe950e9 | 2861 | |
6de2ae4a | 2862 | if (htab->elf.splt != NULL) |
7afd84dc L |
2863 | { |
2864 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
2865 | off = (plt_index + 3) * GOT_ENTRY_SIZE; | |
6de2ae4a | 2866 | base_got = htab->elf.sgotplt; |
7afd84dc | 2867 | } |
cbe950e9 L |
2868 | else |
2869 | { | |
7afd84dc L |
2870 | plt_index = h->plt.offset / PLT_ENTRY_SIZE; |
2871 | off = plt_index * GOT_ENTRY_SIZE; | |
6de2ae4a | 2872 | base_got = htab->elf.igotplt; |
7afd84dc L |
2873 | } |
2874 | ||
2875 | if (h->dynindx == -1 | |
2876 | || h->forced_local | |
2877 | || info->symbolic) | |
2878 | { | |
2879 | /* This references the local defitionion. We must | |
2880 | initialize this entry in the global offset table. | |
2881 | Since the offset must always be a multiple of 8, | |
2882 | we use the least significant bit to record | |
2883 | whether we have initialized it already. | |
2884 | ||
2885 | When doing a dynamic link, we create a .rela.got | |
2886 | relocation entry to initialize the value. This | |
2887 | is done in the finish_dynamic_symbol routine. */ | |
2888 | if ((off & 1) != 0) | |
2889 | off &= ~1; | |
2890 | else | |
2891 | { | |
2892 | bfd_put_64 (output_bfd, relocation, | |
2893 | base_got->contents + off); | |
2894 | /* Note that this is harmless for the GOTPLT64 | |
2895 | case, as -1 | 1 still is -1. */ | |
2896 | h->got.offset |= 1; | |
2897 | } | |
cbe950e9 L |
2898 | } |
2899 | } | |
2900 | ||
2901 | relocation = (base_got->output_section->vma | |
2902 | + base_got->output_offset + off); | |
2903 | ||
2904 | if (r_type != R_X86_64_GOTPCREL | |
2905 | && r_type != R_X86_64_GOTPCREL64) | |
2906 | { | |
2907 | asection *gotplt; | |
6de2ae4a L |
2908 | if (htab->elf.splt != NULL) |
2909 | gotplt = htab->elf.sgotplt; | |
cbe950e9 | 2910 | else |
6de2ae4a | 2911 | gotplt = htab->elf.igotplt; |
cbe950e9 L |
2912 | relocation -= (gotplt->output_section->vma |
2913 | - gotplt->output_offset); | |
2914 | } | |
2915 | ||
2916 | goto do_relocation; | |
2917 | } | |
2918 | } | |
2919 | ||
70256ad8 AJ |
2920 | /* When generating a shared object, the relocations handled here are |
2921 | copied into the output file to be resolved at run time. */ | |
2922 | switch (r_type) | |
2923 | { | |
2924 | case R_X86_64_GOT32: | |
7b81dfbb | 2925 | case R_X86_64_GOT64: |
70256ad8 AJ |
2926 | /* Relocation is to the entry for this symbol in the global |
2927 | offset table. */ | |
70256ad8 | 2928 | case R_X86_64_GOTPCREL: |
7b81dfbb AJ |
2929 | case R_X86_64_GOTPCREL64: |
2930 | /* Use global offset table entry as symbol value. */ | |
2931 | case R_X86_64_GOTPLT64: | |
2932 | /* This is the same as GOT64 for relocation purposes, but | |
2933 | indicates the existence of a PLT entry. The difficulty is, | |
2934 | that we must calculate the GOT slot offset from the PLT | |
2935 | offset, if this symbol got a PLT entry (it was global). | |
2936 | Additionally if it's computed from the PLT entry, then that | |
2937 | GOT offset is relative to .got.plt, not to .got. */ | |
6de2ae4a | 2938 | base_got = htab->elf.sgot; |
7b81dfbb | 2939 | |
6de2ae4a | 2940 | if (htab->elf.sgot == NULL) |
c434dee6 | 2941 | abort (); |
053579d7 | 2942 | |
51e0a107 | 2943 | if (h != NULL) |
70256ad8 | 2944 | { |
b34976b6 | 2945 | bfd_boolean dyn; |
c434dee6 AJ |
2946 | |
2947 | off = h->got.offset; | |
7b81dfbb AJ |
2948 | if (h->needs_plt |
2949 | && h->plt.offset != (bfd_vma)-1 | |
2950 | && off == (bfd_vma)-1) | |
2951 | { | |
2952 | /* We can't use h->got.offset here to save | |
2953 | state, or even just remember the offset, as | |
2954 | finish_dynamic_symbol would use that as offset into | |
2955 | .got. */ | |
2956 | bfd_vma plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
2957 | off = (plt_index + 3) * GOT_ENTRY_SIZE; | |
6de2ae4a | 2958 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
2959 | } |
2960 | ||
c434dee6 | 2961 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 2962 | |
27482721 | 2963 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
51e0a107 | 2964 | || (info->shared |
27482721 | 2965 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
2966 | || (ELF_ST_VISIBILITY (h->other) |
2967 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
2968 | { |
2969 | /* This is actually a static link, or it is a -Bsymbolic | |
2970 | link and the symbol is defined locally, or the symbol | |
407443a3 | 2971 | was forced to be local because of a version file. We |
51e0a107 JH |
2972 | must initialize this entry in the global offset table. |
2973 | Since the offset must always be a multiple of 8, we | |
2974 | use the least significant bit to record whether we | |
2975 | have initialized it already. | |
2976 | ||
2977 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
2978 | relocation entry to initialize the value. This is |
2979 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
2980 | if ((off & 1) != 0) |
2981 | off &= ~1; | |
2982 | else | |
2983 | { | |
2984 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
2985 | base_got->contents + off); |
2986 | /* Note that this is harmless for the GOTPLT64 case, | |
2987 | as -1 | 1 still is -1. */ | |
51e0a107 JH |
2988 | h->got.offset |= 1; |
2989 | } | |
2990 | } | |
053579d7 | 2991 | else |
b34976b6 | 2992 | unresolved_reloc = FALSE; |
70256ad8 | 2993 | } |
51e0a107 JH |
2994 | else |
2995 | { | |
c434dee6 AJ |
2996 | if (local_got_offsets == NULL) |
2997 | abort (); | |
51e0a107 JH |
2998 | |
2999 | off = local_got_offsets[r_symndx]; | |
3000 | ||
3001 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
3002 | the least significant bit to record whether we have |
3003 | already generated the necessary reloc. */ | |
51e0a107 JH |
3004 | if ((off & 1) != 0) |
3005 | off &= ~1; | |
3006 | else | |
3007 | { | |
c434dee6 | 3008 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 3009 | base_got->contents + off); |
51e0a107 JH |
3010 | |
3011 | if (info->shared) | |
3012 | { | |
947216bf | 3013 | asection *s; |
51e0a107 | 3014 | Elf_Internal_Rela outrel; |
70256ad8 | 3015 | |
51e0a107 JH |
3016 | /* We need to generate a R_X86_64_RELATIVE reloc |
3017 | for the dynamic linker. */ | |
6de2ae4a | 3018 | s = htab->elf.srelgot; |
947216bf | 3019 | if (s == NULL) |
c434dee6 | 3020 | abort (); |
51e0a107 | 3021 | |
7b81dfbb AJ |
3022 | outrel.r_offset = (base_got->output_section->vma |
3023 | + base_got->output_offset | |
51e0a107 JH |
3024 | + off); |
3025 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); | |
3026 | outrel.r_addend = relocation; | |
464d3bd4 | 3027 | elf64_x86_64_append_rela (output_bfd, s, &outrel); |
51e0a107 JH |
3028 | } |
3029 | ||
3030 | local_got_offsets[r_symndx] |= 1; | |
3031 | } | |
51e0a107 | 3032 | } |
6a2bda3f | 3033 | |
c434dee6 AJ |
3034 | if (off >= (bfd_vma) -2) |
3035 | abort (); | |
3036 | ||
7b81dfbb AJ |
3037 | relocation = base_got->output_section->vma |
3038 | + base_got->output_offset + off; | |
3039 | if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
3040 | relocation -= htab->elf.sgotplt->output_section->vma |
3041 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 3042 | |
70256ad8 AJ |
3043 | break; |
3044 | ||
d6ab8113 JB |
3045 | case R_X86_64_GOTOFF64: |
3046 | /* Relocation is relative to the start of the global offset | |
3047 | table. */ | |
3048 | ||
3049 | /* Check to make sure it isn't a protected function symbol | |
3050 | for shared library since it may not be local when used | |
3051 | as function address. */ | |
3052 | if (info->shared | |
3053 | && h | |
3054 | && h->def_regular | |
3055 | && h->type == STT_FUNC | |
3056 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
3057 | { | |
3058 | (*_bfd_error_handler) | |
3059 | (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"), | |
3060 | input_bfd, h->root.root.string); | |
3061 | bfd_set_error (bfd_error_bad_value); | |
3062 | return FALSE; | |
3063 | } | |
3064 | ||
3065 | /* Note that sgot is not involved in this | |
3066 | calculation. We always want the start of .got.plt. If we | |
3067 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
3068 | permitted by the ABI, we might have to change this | |
3069 | calculation. */ | |
6de2ae4a L |
3070 | relocation -= htab->elf.sgotplt->output_section->vma |
3071 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3072 | break; |
3073 | ||
3074 | case R_X86_64_GOTPC32: | |
7b81dfbb | 3075 | case R_X86_64_GOTPC64: |
d6ab8113 | 3076 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
3077 | relocation = htab->elf.sgotplt->output_section->vma |
3078 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3079 | unresolved_reloc = FALSE; |
3080 | break; | |
7b81dfbb AJ |
3081 | |
3082 | case R_X86_64_PLTOFF64: | |
3083 | /* Relocation is PLT entry relative to GOT. For local | |
3084 | symbols it's the symbol itself relative to GOT. */ | |
3085 | if (h != NULL | |
3086 | /* See PLT32 handling. */ | |
3087 | && h->plt.offset != (bfd_vma) -1 | |
6de2ae4a | 3088 | && htab->elf.splt != NULL) |
7b81dfbb | 3089 | { |
6de2ae4a L |
3090 | relocation = (htab->elf.splt->output_section->vma |
3091 | + htab->elf.splt->output_offset | |
7b81dfbb AJ |
3092 | + h->plt.offset); |
3093 | unresolved_reloc = FALSE; | |
3094 | } | |
3095 | ||
6de2ae4a L |
3096 | relocation -= htab->elf.sgotplt->output_section->vma |
3097 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 3098 | break; |
d6ab8113 | 3099 | |
70256ad8 AJ |
3100 | case R_X86_64_PLT32: |
3101 | /* Relocation is to the entry for this symbol in the | |
3102 | procedure linkage table. */ | |
3103 | ||
3104 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 3105 | without using the procedure linkage table. */ |
70256ad8 AJ |
3106 | if (h == NULL) |
3107 | break; | |
3108 | ||
c434dee6 | 3109 | if (h->plt.offset == (bfd_vma) -1 |
6de2ae4a | 3110 | || htab->elf.splt == NULL) |
70256ad8 AJ |
3111 | { |
3112 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
3113 | happens when statically linking PIC code, or when |
3114 | using -Bsymbolic. */ | |
70256ad8 AJ |
3115 | break; |
3116 | } | |
3117 | ||
6de2ae4a L |
3118 | relocation = (htab->elf.splt->output_section->vma |
3119 | + htab->elf.splt->output_offset | |
70256ad8 | 3120 | + h->plt.offset); |
b34976b6 | 3121 | unresolved_reloc = FALSE; |
70256ad8 AJ |
3122 | break; |
3123 | ||
fd8ab9e5 AJ |
3124 | case R_X86_64_PC8: |
3125 | case R_X86_64_PC16: | |
3126 | case R_X86_64_PC32: | |
6610a52d | 3127 | if (info->shared |
ba3bee0b | 3128 | && (input_section->flags & SEC_ALLOC) != 0 |
90f487df | 3129 | && (input_section->flags & SEC_READONLY) != 0 |
41bed6dd | 3130 | && h != NULL) |
6610a52d | 3131 | { |
41bed6dd L |
3132 | bfd_boolean fail = FALSE; |
3133 | bfd_boolean branch | |
3134 | = (r_type == R_X86_64_PC32 | |
3135 | && is_32bit_relative_branch (contents, rel->r_offset)); | |
3136 | ||
3137 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
3138 | { | |
3139 | /* Symbol is referenced locally. Make sure it is | |
3140 | defined locally or for a branch. */ | |
3141 | fail = !h->def_regular && !branch; | |
3142 | } | |
90f487df | 3143 | else |
41bed6dd L |
3144 | { |
3145 | /* Symbol isn't referenced locally. We only allow | |
3146 | branch to symbol with non-default visibility. */ | |
3147 | fail = (!branch | |
3148 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
3149 | } | |
3150 | ||
3151 | if (fail) | |
3152 | { | |
3153 | const char *fmt; | |
3154 | const char *v; | |
3155 | const char *pic = ""; | |
3156 | ||
3157 | switch (ELF_ST_VISIBILITY (h->other)) | |
3158 | { | |
3159 | case STV_HIDDEN: | |
3160 | v = _("hidden symbol"); | |
3161 | break; | |
3162 | case STV_INTERNAL: | |
3163 | v = _("internal symbol"); | |
3164 | break; | |
3165 | case STV_PROTECTED: | |
3166 | v = _("protected symbol"); | |
3167 | break; | |
3168 | default: | |
3169 | v = _("symbol"); | |
3170 | pic = _("; recompile with -fPIC"); | |
3171 | break; | |
3172 | } | |
3173 | ||
3174 | if (h->def_regular) | |
3175 | fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s"); | |
3176 | else | |
3177 | fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s"); | |
3178 | ||
3179 | (*_bfd_error_handler) (fmt, input_bfd, | |
3180 | x86_64_elf_howto_table[r_type].name, | |
3181 | v, h->root.root.string, pic); | |
3182 | bfd_set_error (bfd_error_bad_value); | |
3183 | return FALSE; | |
3184 | } | |
6610a52d L |
3185 | } |
3186 | /* Fall through. */ | |
3187 | ||
70256ad8 AJ |
3188 | case R_X86_64_8: |
3189 | case R_X86_64_16: | |
3190 | case R_X86_64_32: | |
d6ab8113 | 3191 | case R_X86_64_PC64: |
6b3db546 | 3192 | case R_X86_64_64: |
80643fbc | 3193 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 3194 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 3195 | |
b1e24c02 | 3196 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
3197 | break; |
3198 | ||
3199 | if ((info->shared | |
4bc6e03a AJ |
3200 | && (h == NULL |
3201 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3202 | || h->root.type != bfd_link_hash_undefweak) | |
d8045f23 NC |
3203 | && (! IS_X86_64_PCREL_TYPE (r_type) |
3204 | || ! SYMBOL_CALLS_LOCAL (info, h))) | |
d40d037c AJ |
3205 | || (ELIMINATE_COPY_RELOCS |
3206 | && !info->shared | |
c434dee6 AJ |
3207 | && h != NULL |
3208 | && h->dynindx != -1 | |
f5385ebf AM |
3209 | && !h->non_got_ref |
3210 | && ((h->def_dynamic | |
3211 | && !h->def_regular) | |
c434dee6 | 3212 | || h->root.type == bfd_link_hash_undefweak |
0f88be7a | 3213 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
3214 | { |
3215 | Elf_Internal_Rela outrel; | |
b34976b6 | 3216 | bfd_boolean skip, relocate; |
c434dee6 | 3217 | asection *sreloc; |
70256ad8 AJ |
3218 | |
3219 | /* When generating a shared object, these relocations | |
3220 | are copied into the output file to be resolved at run | |
407443a3 | 3221 | time. */ |
b34976b6 AM |
3222 | skip = FALSE; |
3223 | relocate = FALSE; | |
70256ad8 | 3224 | |
c629eae0 JJ |
3225 | outrel.r_offset = |
3226 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 3227 | rel->r_offset); |
c629eae0 | 3228 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 3229 | skip = TRUE; |
0fb19cbc | 3230 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 3231 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
3232 | |
3233 | outrel.r_offset += (input_section->output_section->vma | |
3234 | + input_section->output_offset); | |
3235 | ||
3236 | if (skip) | |
0bb2d96a | 3237 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 3238 | |
fd8ab9e5 AJ |
3239 | /* h->dynindx may be -1 if this symbol was marked to |
3240 | become local. */ | |
3241 | else if (h != NULL | |
c434dee6 | 3242 | && h->dynindx != -1 |
d8045f23 NC |
3243 | && (IS_X86_64_PCREL_TYPE (r_type) |
3244 | || ! info->shared | |
3245 | || ! SYMBOLIC_BIND (info, h) | |
3246 | || ! h->def_regular)) | |
70256ad8 | 3247 | { |
70256ad8 | 3248 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
c434dee6 | 3249 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
3250 | } |
3251 | else | |
3252 | { | |
c434dee6 | 3253 | /* This symbol is local, or marked to become local. */ |
607c0e09 AS |
3254 | if (r_type == R_X86_64_64) |
3255 | { | |
b34976b6 | 3256 | relocate = TRUE; |
607c0e09 AS |
3257 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
3258 | outrel.r_addend = relocation + rel->r_addend; | |
3259 | } | |
3260 | else | |
3261 | { | |
3262 | long sindx; | |
3263 | ||
8517fae7 | 3264 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
3265 | sindx = 0; |
3266 | else if (sec == NULL || sec->owner == NULL) | |
3267 | { | |
3268 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3269 | return FALSE; |
607c0e09 AS |
3270 | } |
3271 | else | |
3272 | { | |
3273 | asection *osec; | |
3274 | ||
74541ad4 AM |
3275 | /* We are turning this relocation into one |
3276 | against a section symbol. It would be | |
3277 | proper to subtract the symbol's value, | |
3278 | osec->vma, from the emitted reloc addend, | |
3279 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
3280 | osec = sec->output_section; |
3281 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
3282 | if (sindx == 0) |
3283 | { | |
3284 | asection *oi = htab->elf.text_index_section; | |
3285 | sindx = elf_section_data (oi)->dynindx; | |
3286 | } | |
3287 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
3288 | } |
3289 | ||
3290 | outrel.r_info = ELF64_R_INFO (sindx, r_type); | |
3291 | outrel.r_addend = relocation + rel->r_addend; | |
3292 | } | |
70256ad8 AJ |
3293 | } |
3294 | ||
cbe950e9 | 3295 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 3296 | |
e7c33416 | 3297 | BFD_ASSERT (sreloc != NULL && sreloc->contents != NULL); |
c434dee6 | 3298 | |
464d3bd4 | 3299 | elf64_x86_64_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
3300 | |
3301 | /* If this reloc is against an external symbol, we do | |
3302 | not want to fiddle with the addend. Otherwise, we | |
3303 | need to include the symbol value so that it becomes | |
3304 | an addend for the dynamic reloc. */ | |
0f88be7a | 3305 | if (! relocate) |
70256ad8 AJ |
3306 | continue; |
3307 | } | |
3308 | ||
3309 | break; | |
3310 | ||
bffbf940 | 3311 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
3312 | case R_X86_64_GOTPC32_TLSDESC: |
3313 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 3314 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
3315 | tls_type = GOT_UNKNOWN; |
3316 | if (h == NULL && local_got_offsets) | |
3317 | tls_type = elf64_x86_64_local_got_tls_type (input_bfd) [r_symndx]; | |
3318 | else if (h != NULL) | |
142411ca L |
3319 | tls_type = elf64_x86_64_hash_entry (h)->tls_type; |
3320 | ||
3321 | if (! elf64_x86_64_tls_transition (info, input_bfd, | |
3322 | input_section, contents, | |
3323 | symtab_hdr, sym_hashes, | |
3324 | &r_type, tls_type, rel, | |
4c544807 | 3325 | relend, h, r_symndx)) |
534a31f6 | 3326 | return FALSE; |
bffbf940 JJ |
3327 | |
3328 | if (r_type == R_X86_64_TPOFF32) | |
3329 | { | |
142411ca L |
3330 | bfd_vma roff = rel->r_offset; |
3331 | ||
bffbf940 | 3332 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 3333 | |
bffbf940 JJ |
3334 | if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
3335 | { | |
bffbf940 | 3336 | /* GD->LE transition. |
abcf1d52 | 3337 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
a3fadc9a | 3338 | .word 0x6666; rex64; call __tls_get_addr |
bffbf940 JJ |
3339 | Change it into: |
3340 | movq %fs:0, %rax | |
3341 | leaq foo@tpoff(%rax), %rax */ | |
142411ca | 3342 | memcpy (contents + roff - 4, |
bffbf940 JJ |
3343 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", |
3344 | 16); | |
eb4ff4d6 L |
3345 | bfd_put_32 (output_bfd, |
3346 | elf64_x86_64_tpoff (info, relocation), | |
142411ca | 3347 | contents + roff + 8); |
a3fadc9a | 3348 | /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ |
bffbf940 JJ |
3349 | rel++; |
3350 | continue; | |
3351 | } | |
67a4f2b7 AO |
3352 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
3353 | { | |
3354 | /* GDesc -> LE transition. | |
3355 | It's originally something like: | |
3356 | leaq x@tlsdesc(%rip), %rax | |
3357 | ||
3358 | Change it to: | |
c9736ba0 | 3359 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 3360 | |
c9736ba0 | 3361 | unsigned int val, type; |
67a4f2b7 | 3362 | |
67a4f2b7 | 3363 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 3364 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
3365 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
3366 | contents + roff - 3); | |
3367 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
3368 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3369 | contents + roff - 1); | |
eb4ff4d6 L |
3370 | bfd_put_32 (output_bfd, |
3371 | elf64_x86_64_tpoff (info, relocation), | |
67a4f2b7 AO |
3372 | contents + roff); |
3373 | continue; | |
3374 | } | |
3375 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) | |
3376 | { | |
3377 | /* GDesc -> LE transition. | |
3378 | It's originally: | |
3379 | call *(%rax) | |
3380 | Turn it into: | |
142411ca | 3381 | xchg %ax,%ax. */ |
10efb593 | 3382 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
3383 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3384 | continue; | |
3385 | } | |
142411ca | 3386 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 3387 | { |
bffbf940 JJ |
3388 | /* IE->LE transition: |
3389 | Originally it can be one of: | |
3390 | movq foo@gottpoff(%rip), %reg | |
3391 | addq foo@gottpoff(%rip), %reg | |
3392 | We change it into: | |
3393 | movq $foo, %reg | |
3394 | leaq foo(%reg), %reg | |
3395 | addq $foo, %reg. */ | |
142411ca L |
3396 | |
3397 | unsigned int val, type, reg; | |
3398 | ||
3399 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
3400 | type = bfd_get_8 (input_bfd, contents + roff - 2); | |
3401 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 3402 | reg >>= 3; |
bffbf940 JJ |
3403 | if (type == 0x8b) |
3404 | { | |
3405 | /* movq */ | |
3406 | if (val == 0x4c) | |
3407 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3408 | contents + roff - 3); |
bffbf940 | 3409 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 3410 | contents + roff - 2); |
bffbf940 | 3411 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3412 | contents + roff - 1); |
bffbf940 JJ |
3413 | } |
3414 | else if (reg == 4) | |
3415 | { | |
3416 | /* addq -> addq - addressing with %rsp/%r12 is | |
3417 | special */ | |
3418 | if (val == 0x4c) | |
3419 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3420 | contents + roff - 3); |
bffbf940 | 3421 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 3422 | contents + roff - 2); |
bffbf940 | 3423 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3424 | contents + roff - 1); |
bffbf940 JJ |
3425 | } |
3426 | else | |
3427 | { | |
3428 | /* addq -> leaq */ | |
3429 | if (val == 0x4c) | |
3430 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 3431 | contents + roff - 3); |
bffbf940 | 3432 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 3433 | contents + roff - 2); |
bffbf940 | 3434 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 3435 | contents + roff - 1); |
bffbf940 | 3436 | } |
eb4ff4d6 L |
3437 | bfd_put_32 (output_bfd, |
3438 | elf64_x86_64_tpoff (info, relocation), | |
142411ca | 3439 | contents + roff); |
bffbf940 JJ |
3440 | continue; |
3441 | } | |
142411ca L |
3442 | else |
3443 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
3444 | } |
3445 | ||
6de2ae4a | 3446 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3447 | abort (); |
3448 | ||
3449 | if (h != NULL) | |
67a4f2b7 AO |
3450 | { |
3451 | off = h->got.offset; | |
3452 | offplt = elf64_x86_64_hash_entry (h)->tlsdesc_got; | |
3453 | } | |
bffbf940 JJ |
3454 | else |
3455 | { | |
3456 | if (local_got_offsets == NULL) | |
3457 | abort (); | |
3458 | ||
3459 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 3460 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
3461 | } |
3462 | ||
3463 | if ((off & 1) != 0) | |
3464 | off &= ~1; | |
26e41594 | 3465 | else |
bffbf940 JJ |
3466 | { |
3467 | Elf_Internal_Rela outrel; | |
bffbf940 | 3468 | int dr_type, indx; |
67a4f2b7 | 3469 | asection *sreloc; |
bffbf940 | 3470 | |
6de2ae4a | 3471 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3472 | abort (); |
3473 | ||
67a4f2b7 AO |
3474 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3475 | ||
3476 | if (GOT_TLS_GDESC_P (tls_type)) | |
3477 | { | |
3478 | outrel.r_info = ELF64_R_INFO (indx, R_X86_64_TLSDESC); | |
3479 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt | |
6de2ae4a L |
3480 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
3481 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
3482 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3483 | + offplt |
3484 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 3485 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 3486 | if (indx == 0) |
eb4ff4d6 | 3487 | outrel.r_addend = relocation - elf64_x86_64_dtpoff_base (info); |
67a4f2b7 AO |
3488 | else |
3489 | outrel.r_addend = 0; | |
464d3bd4 | 3490 | elf64_x86_64_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
3491 | } |
3492 | ||
6de2ae4a | 3493 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 3494 | |
6de2ae4a L |
3495 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3496 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 3497 | |
67a4f2b7 | 3498 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 3499 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
3500 | else if (GOT_TLS_GDESC_P (tls_type)) |
3501 | goto dr_done; | |
bffbf940 JJ |
3502 | else |
3503 | dr_type = R_X86_64_TPOFF64; | |
3504 | ||
6de2ae4a | 3505 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 3506 | outrel.r_addend = 0; |
67a4f2b7 AO |
3507 | if ((dr_type == R_X86_64_TPOFF64 |
3508 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
eb4ff4d6 | 3509 | outrel.r_addend = relocation - elf64_x86_64_dtpoff_base (info); |
bffbf940 JJ |
3510 | outrel.r_info = ELF64_R_INFO (indx, dr_type); |
3511 | ||
464d3bd4 | 3512 | elf64_x86_64_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 3513 | |
67a4f2b7 | 3514 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
3515 | { |
3516 | if (indx == 0) | |
3517 | { | |
d40d037c | 3518 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 3519 | bfd_put_64 (output_bfd, |
eb4ff4d6 | 3520 | relocation - elf64_x86_64_dtpoff_base (info), |
6de2ae4a | 3521 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
3522 | } |
3523 | else | |
3524 | { | |
3525 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3526 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
3527 | outrel.r_info = ELF64_R_INFO (indx, |
3528 | R_X86_64_DTPOFF64); | |
3529 | outrel.r_offset += GOT_ENTRY_SIZE; | |
464d3bd4 L |
3530 | elf64_x86_64_append_rela (output_bfd, sreloc, |
3531 | &outrel); | |
bffbf940 JJ |
3532 | } |
3533 | } | |
3534 | ||
67a4f2b7 | 3535 | dr_done: |
bffbf940 JJ |
3536 | if (h != NULL) |
3537 | h->got.offset |= 1; | |
3538 | else | |
3539 | local_got_offsets[r_symndx] |= 1; | |
3540 | } | |
3541 | ||
67a4f2b7 AO |
3542 | if (off >= (bfd_vma) -2 |
3543 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 JJ |
3544 | abort (); |
3545 | if (r_type == ELF64_R_TYPE (rel->r_info)) | |
3546 | { | |
67a4f2b7 AO |
3547 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
3548 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
3549 | relocation = htab->elf.sgotplt->output_section->vma |
3550 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3551 | + offplt + htab->sgotplt_jump_table_size; |
3552 | else | |
6de2ae4a L |
3553 | relocation = htab->elf.sgot->output_section->vma |
3554 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3555 | unresolved_reloc = FALSE; |
bffbf940 | 3556 | } |
142411ca | 3557 | else |
67a4f2b7 | 3558 | { |
142411ca | 3559 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 3560 | |
142411ca L |
3561 | if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
3562 | { | |
3563 | /* GD->IE transition. | |
3564 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3565 | .word 0x6666; rex64; call __tls_get_addr@plt | |
3566 | Change it into: | |
3567 | movq %fs:0, %rax | |
3568 | addq foo@gottpoff(%rip), %rax */ | |
3569 | memcpy (contents + roff - 4, | |
3570 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3571 | 16); | |
3572 | ||
6de2ae4a L |
3573 | relocation = (htab->elf.sgot->output_section->vma |
3574 | + htab->elf.sgot->output_offset + off | |
142411ca L |
3575 | - roff |
3576 | - input_section->output_section->vma | |
3577 | - input_section->output_offset | |
3578 | - 12); | |
3579 | bfd_put_32 (output_bfd, relocation, | |
3580 | contents + roff + 8); | |
3581 | /* Skip R_X86_64_PLT32. */ | |
3582 | rel++; | |
3583 | continue; | |
3584 | } | |
3585 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) | |
3586 | { | |
3587 | /* GDesc -> IE transition. | |
3588 | It's originally something like: | |
3589 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 3590 | |
142411ca | 3591 | Change it to: |
c9736ba0 | 3592 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 3593 | |
142411ca L |
3594 | /* Now modify the instruction as appropriate. To |
3595 | turn a leaq into a movq in the form we use it, it | |
3596 | suffices to change the second byte from 0x8d to | |
3597 | 0x8b. */ | |
3598 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
3599 | ||
3600 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
3601 | htab->elf.sgot->output_section->vma |
3602 | + htab->elf.sgot->output_offset + off | |
142411ca L |
3603 | - rel->r_offset |
3604 | - input_section->output_section->vma | |
3605 | - input_section->output_offset | |
3606 | - 4, | |
3607 | contents + roff); | |
3608 | continue; | |
3609 | } | |
3610 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) | |
3611 | { | |
3612 | /* GDesc -> IE transition. | |
3613 | It's originally: | |
3614 | call *(%rax) | |
3615 | ||
3616 | Change it to: | |
c9736ba0 | 3617 | xchg %ax, %ax. */ |
142411ca | 3618 | |
142411ca L |
3619 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
3620 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
3621 | continue; | |
3622 | } | |
3623 | else | |
3624 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 3625 | } |
bffbf940 JJ |
3626 | break; |
3627 | ||
3628 | case R_X86_64_TLSLD: | |
142411ca L |
3629 | if (! elf64_x86_64_tls_transition (info, input_bfd, |
3630 | input_section, contents, | |
3631 | symtab_hdr, sym_hashes, | |
3632 | &r_type, GOT_UNKNOWN, | |
4c544807 | 3633 | rel, relend, h, r_symndx)) |
142411ca | 3634 | return FALSE; |
a3fadc9a | 3635 | |
142411ca L |
3636 | if (r_type != R_X86_64_TLSLD) |
3637 | { | |
bffbf940 | 3638 | /* LD->LE transition: |
a3fadc9a | 3639 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr. |
bffbf940 JJ |
3640 | We change it into: |
3641 | .word 0x6666; .byte 0x66; movl %fs:0, %rax. */ | |
142411ca L |
3642 | |
3643 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
bffbf940 JJ |
3644 | memcpy (contents + rel->r_offset - 3, |
3645 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
a3fadc9a | 3646 | /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ |
bffbf940 JJ |
3647 | rel++; |
3648 | continue; | |
3649 | } | |
3650 | ||
6de2ae4a | 3651 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3652 | abort (); |
3653 | ||
3654 | off = htab->tls_ld_got.offset; | |
3655 | if (off & 1) | |
3656 | off &= ~1; | |
3657 | else | |
3658 | { | |
3659 | Elf_Internal_Rela outrel; | |
bffbf940 | 3660 | |
6de2ae4a | 3661 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3662 | abort (); |
3663 | ||
6de2ae4a L |
3664 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3665 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
3666 | |
3667 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3668 | htab->elf.sgot->contents + off); |
bffbf940 | 3669 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 3670 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
3671 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_DTPMOD64); |
3672 | outrel.r_addend = 0; | |
464d3bd4 L |
3673 | elf64_x86_64_append_rela (output_bfd, htab->elf.srelgot, |
3674 | &outrel); | |
bffbf940 JJ |
3675 | htab->tls_ld_got.offset |= 1; |
3676 | } | |
6de2ae4a L |
3677 | relocation = htab->elf.sgot->output_section->vma |
3678 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3679 | unresolved_reloc = FALSE; |
bffbf940 JJ |
3680 | break; |
3681 | ||
3682 | case R_X86_64_DTPOFF32: | |
1d85728f | 3683 | if (!info->executable|| (input_section->flags & SEC_CODE) == 0) |
eb4ff4d6 | 3684 | relocation -= elf64_x86_64_dtpoff_base (info); |
bffbf940 | 3685 | else |
eb4ff4d6 | 3686 | relocation = elf64_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
3687 | break; |
3688 | ||
3689 | case R_X86_64_TPOFF32: | |
9b769489 | 3690 | BFD_ASSERT (info->executable); |
eb4ff4d6 | 3691 | relocation = elf64_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
3692 | break; |
3693 | ||
70256ad8 AJ |
3694 | default: |
3695 | break; | |
3696 | } | |
8d88c4ca | 3697 | |
239e1f3a AM |
3698 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3699 | because such sections are not SEC_ALLOC and thus ld.so will | |
3700 | not process them. */ | |
c434dee6 | 3701 | if (unresolved_reloc |
239e1f3a | 3702 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
f5385ebf | 3703 | && h->def_dynamic)) |
c434dee6 | 3704 | (*_bfd_error_handler) |
843fe662 | 3705 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
3706 | input_bfd, |
3707 | input_section, | |
c434dee6 | 3708 | (long) rel->r_offset, |
843fe662 | 3709 | howto->name, |
c434dee6 AJ |
3710 | h->root.root.string); |
3711 | ||
cbe950e9 | 3712 | do_relocation: |
8d88c4ca | 3713 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
3714 | contents, rel->r_offset, |
3715 | relocation, rel->r_addend); | |
8d88c4ca NC |
3716 | |
3717 | if (r != bfd_reloc_ok) | |
8da6118f | 3718 | { |
c434dee6 AJ |
3719 | const char *name; |
3720 | ||
3721 | if (h != NULL) | |
3722 | name = h->root.root.string; | |
3723 | else | |
8da6118f | 3724 | { |
c434dee6 AJ |
3725 | name = bfd_elf_string_from_elf_section (input_bfd, |
3726 | symtab_hdr->sh_link, | |
3727 | sym->st_name); | |
3728 | if (name == NULL) | |
b34976b6 | 3729 | return FALSE; |
c434dee6 AJ |
3730 | if (*name == '\0') |
3731 | name = bfd_section_name (input_bfd, sec); | |
3732 | } | |
3733 | ||
3734 | if (r == bfd_reloc_overflow) | |
3735 | { | |
c434dee6 | 3736 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
3737 | (info, (h ? &h->root : NULL), name, howto->name, |
3738 | (bfd_vma) 0, input_bfd, input_section, | |
3739 | rel->r_offset))) | |
b34976b6 | 3740 | return FALSE; |
c434dee6 AJ |
3741 | } |
3742 | else | |
3743 | { | |
3744 | (*_bfd_error_handler) | |
d003868e AM |
3745 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
3746 | input_bfd, input_section, | |
c434dee6 | 3747 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 3748 | return FALSE; |
8da6118f KH |
3749 | } |
3750 | } | |
8d88c4ca | 3751 | } |
70256ad8 | 3752 | |
b34976b6 | 3753 | return TRUE; |
70256ad8 AJ |
3754 | } |
3755 | ||
3756 | /* Finish up dynamic symbol handling. We set the contents of various | |
3757 | dynamic sections here. */ | |
3758 | ||
b34976b6 | 3759 | static bfd_boolean |
27482721 AJ |
3760 | elf64_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
3761 | struct bfd_link_info *info, | |
3762 | struct elf_link_hash_entry *h, | |
3763 | Elf_Internal_Sym *sym) | |
70256ad8 | 3764 | { |
c434dee6 | 3765 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 | 3766 | |
c434dee6 | 3767 | htab = elf64_x86_64_hash_table (info); |
4dfe6ac6 NC |
3768 | if (htab == NULL) |
3769 | return FALSE; | |
70256ad8 AJ |
3770 | |
3771 | if (h->plt.offset != (bfd_vma) -1) | |
3772 | { | |
70256ad8 AJ |
3773 | bfd_vma plt_index; |
3774 | bfd_vma got_offset; | |
3775 | Elf_Internal_Rela rela; | |
947216bf | 3776 | bfd_byte *loc; |
cbe950e9 L |
3777 | asection *plt, *gotplt, *relplt; |
3778 | ||
3779 | /* When building a static executable, use .iplt, .igot.plt and | |
3780 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 3781 | if (htab->elf.splt != NULL) |
cbe950e9 | 3782 | { |
6de2ae4a L |
3783 | plt = htab->elf.splt; |
3784 | gotplt = htab->elf.sgotplt; | |
3785 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
3786 | } |
3787 | else | |
3788 | { | |
6de2ae4a L |
3789 | plt = htab->elf.iplt; |
3790 | gotplt = htab->elf.igotplt; | |
3791 | relplt = htab->elf.irelplt; | |
cbe950e9 | 3792 | } |
70256ad8 AJ |
3793 | |
3794 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 3795 | it up. */ |
cbe950e9 L |
3796 | if ((h->dynindx == -1 |
3797 | && !((h->forced_local || info->executable) | |
3798 | && h->def_regular | |
3799 | && h->type == STT_GNU_IFUNC)) | |
3800 | || plt == NULL | |
3801 | || gotplt == NULL | |
3802 | || relplt == NULL) | |
c434dee6 | 3803 | abort (); |
70256ad8 AJ |
3804 | |
3805 | /* Get the index in the procedure linkage table which | |
3806 | corresponds to this symbol. This is the index of this symbol | |
3807 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 3808 | first entry in the procedure linkage table is reserved. |
6bbec505 | 3809 | |
cbe950e9 | 3810 | Get the offset into the .got table of the entry that |
407443a3 | 3811 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
3812 | bytes. The first three are reserved for the dynamic linker. |
3813 | ||
3814 | For static executables, we don't reserve anything. */ | |
3815 | ||
6de2ae4a | 3816 | if (plt == htab->elf.splt) |
cbe950e9 L |
3817 | { |
3818 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
3819 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; | |
3820 | } | |
3821 | else | |
3822 | { | |
3823 | plt_index = h->plt.offset / PLT_ENTRY_SIZE; | |
3824 | got_offset = plt_index * GOT_ENTRY_SIZE; | |
3825 | } | |
70256ad8 AJ |
3826 | |
3827 | /* Fill in the entry in the procedure linkage table. */ | |
cbe950e9 | 3828 | memcpy (plt->contents + h->plt.offset, elf64_x86_64_plt_entry, |
70256ad8 AJ |
3829 | PLT_ENTRY_SIZE); |
3830 | ||
3831 | /* Insert the relocation positions of the plt section. The magic | |
3832 | numbers at the end of the statements are the positions of the | |
3833 | relocations in the plt section. */ | |
653165cc AJ |
3834 | /* Put offset for jmp *name@GOTPCREL(%rip), since the |
3835 | instruction uses 6 bytes, subtract this value. */ | |
3836 | bfd_put_32 (output_bfd, | |
cbe950e9 L |
3837 | (gotplt->output_section->vma |
3838 | + gotplt->output_offset | |
653165cc | 3839 | + got_offset |
cbe950e9 L |
3840 | - plt->output_section->vma |
3841 | - plt->output_offset | |
653165cc AJ |
3842 | - h->plt.offset |
3843 | - 6), | |
cbe950e9 L |
3844 | plt->contents + h->plt.offset + 2); |
3845 | ||
3846 | /* Don't fill PLT entry for static executables. */ | |
6de2ae4a | 3847 | if (plt == htab->elf.splt) |
cbe950e9 L |
3848 | { |
3849 | /* Put relocation index. */ | |
3850 | bfd_put_32 (output_bfd, plt_index, | |
3851 | plt->contents + h->plt.offset + 7); | |
3852 | /* Put offset for jmp .PLT0. */ | |
3853 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), | |
3854 | plt->contents + h->plt.offset + 12); | |
3855 | } | |
70256ad8 | 3856 | |
653165cc AJ |
3857 | /* Fill in the entry in the global offset table, initially this |
3858 | points to the pushq instruction in the PLT which is at offset 6. */ | |
cbe950e9 L |
3859 | bfd_put_64 (output_bfd, (plt->output_section->vma |
3860 | + plt->output_offset | |
70256ad8 | 3861 | + h->plt.offset + 6), |
cbe950e9 | 3862 | gotplt->contents + got_offset); |
70256ad8 AJ |
3863 | |
3864 | /* Fill in the entry in the .rela.plt section. */ | |
cbe950e9 L |
3865 | rela.r_offset = (gotplt->output_section->vma |
3866 | + gotplt->output_offset | |
70256ad8 | 3867 | + got_offset); |
cbe950e9 L |
3868 | if (h->dynindx == -1 |
3869 | || ((info->executable | |
3870 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
3871 | && h->def_regular | |
3872 | && h->type == STT_GNU_IFUNC)) | |
3873 | { | |
3874 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
3875 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
3876 | rela.r_info = ELF64_R_INFO (0, R_X86_64_IRELATIVE); | |
3877 | rela.r_addend = (h->root.u.def.value | |
3878 | + h->root.u.def.section->output_section->vma | |
3879 | + h->root.u.def.section->output_offset); | |
3880 | } | |
3881 | else | |
3882 | { | |
3883 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_JUMP_SLOT); | |
3884 | rela.r_addend = 0; | |
3885 | } | |
3886 | loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela); | |
c434dee6 | 3887 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 | 3888 | |
f5385ebf | 3889 | if (!h->def_regular) |
70256ad8 AJ |
3890 | { |
3891 | /* Mark the symbol as undefined, rather than as defined in | |
47a9f7b3 JJ |
3892 | the .plt section. Leave the value if there were any |
3893 | relocations where pointer equality matters (this is a clue | |
c434dee6 AJ |
3894 | for the dynamic linker, to make function pointer |
3895 | comparisons work between an application and shared | |
47a9f7b3 JJ |
3896 | library), otherwise set it to zero. If a function is only |
3897 | called from a binary, there is no need to slow down | |
3898 | shared libraries because of that. */ | |
70256ad8 | 3899 | sym->st_shndx = SHN_UNDEF; |
f5385ebf | 3900 | if (!h->pointer_equality_needed) |
47a9f7b3 | 3901 | sym->st_value = 0; |
70256ad8 AJ |
3902 | } |
3903 | } | |
3904 | ||
bffbf940 | 3905 | if (h->got.offset != (bfd_vma) -1 |
67a4f2b7 | 3906 | && ! GOT_TLS_GD_ANY_P (elf64_x86_64_hash_entry (h)->tls_type) |
bffbf940 | 3907 | && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE) |
053579d7 | 3908 | { |
053579d7 AJ |
3909 | Elf_Internal_Rela rela; |
3910 | ||
3911 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 3912 | up. */ |
6de2ae4a | 3913 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 3914 | abort (); |
053579d7 | 3915 | |
6de2ae4a L |
3916 | rela.r_offset = (htab->elf.sgot->output_section->vma |
3917 | + htab->elf.sgot->output_offset | |
dc810e39 | 3918 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
3919 | |
3920 | /* If this is a static link, or it is a -Bsymbolic link and the | |
3921 | symbol is defined locally or was forced to be local because | |
3922 | of a version file, we just want to emit a RELATIVE reloc. | |
3923 | The entry in the global offset table will already have been | |
3924 | initialized in the relocate_section function. */ | |
710ab287 | 3925 | if (h->def_regular |
0018b0a3 L |
3926 | && h->type == STT_GNU_IFUNC) |
3927 | { | |
710ab287 L |
3928 | if (info->shared) |
3929 | { | |
3930 | /* Generate R_X86_64_GLOB_DAT. */ | |
3931 | goto do_glob_dat; | |
3932 | } | |
3933 | else | |
3934 | { | |
90d60710 L |
3935 | asection *plt; |
3936 | ||
710ab287 L |
3937 | if (!h->pointer_equality_needed) |
3938 | abort (); | |
3939 | ||
3940 | /* For non-shared object, we can't use .got.plt, which | |
3941 | contains the real function addres if we need pointer | |
3942 | equality. We load the GOT entry with the PLT entry. */ | |
90d60710 | 3943 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
3944 | bfd_put_64 (output_bfd, (plt->output_section->vma |
3945 | + plt->output_offset | |
3946 | + h->plt.offset), | |
6de2ae4a | 3947 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
3948 | return TRUE; |
3949 | } | |
0018b0a3 L |
3950 | } |
3951 | else if (info->shared | |
3952 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
053579d7 | 3953 | { |
41bed6dd L |
3954 | if (!h->def_regular) |
3955 | return FALSE; | |
cc78d0af | 3956 | BFD_ASSERT((h->got.offset & 1) != 0); |
053579d7 AJ |
3957 | rela.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
3958 | rela.r_addend = (h->root.u.def.value | |
3959 | + h->root.u.def.section->output_section->vma | |
3960 | + h->root.u.def.section->output_offset); | |
3961 | } | |
3962 | else | |
3963 | { | |
3964 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 3965 | do_glob_dat: |
c434dee6 | 3966 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 3967 | htab->elf.sgot->contents + h->got.offset); |
053579d7 AJ |
3968 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_GLOB_DAT); |
3969 | rela.r_addend = 0; | |
3970 | } | |
3971 | ||
464d3bd4 | 3972 | elf64_x86_64_append_rela (output_bfd, htab->elf.srelgot, &rela); |
053579d7 AJ |
3973 | } |
3974 | ||
f5385ebf | 3975 | if (h->needs_copy) |
70256ad8 | 3976 | { |
70256ad8 AJ |
3977 | Elf_Internal_Rela rela; |
3978 | ||
3979 | /* This symbol needs a copy reloc. Set it up. */ | |
3980 | ||
c434dee6 AJ |
3981 | if (h->dynindx == -1 |
3982 | || (h->root.type != bfd_link_hash_defined | |
3983 | && h->root.type != bfd_link_hash_defweak) | |
3984 | || htab->srelbss == NULL) | |
3985 | abort (); | |
70256ad8 AJ |
3986 | |
3987 | rela.r_offset = (h->root.u.def.value | |
3988 | + h->root.u.def.section->output_section->vma | |
3989 | + h->root.u.def.section->output_offset); | |
3990 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_COPY); | |
3991 | rela.r_addend = 0; | |
464d3bd4 | 3992 | elf64_x86_64_append_rela (output_bfd, htab->srelbss, &rela); |
70256ad8 AJ |
3993 | } |
3994 | ||
c25bc9fc L |
3995 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may |
3996 | be NULL for local symbols. */ | |
3997 | if (sym != NULL | |
3998 | && (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
3999 | || h == htab->elf.hgot)) | |
70256ad8 AJ |
4000 | sym->st_shndx = SHN_ABS; |
4001 | ||
b34976b6 | 4002 | return TRUE; |
70256ad8 AJ |
4003 | } |
4004 | ||
c25bc9fc L |
4005 | /* Finish up local dynamic symbol handling. We set the contents of |
4006 | various dynamic sections here. */ | |
4007 | ||
4008 | static bfd_boolean | |
4009 | elf64_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) | |
4010 | { | |
4011 | struct elf_link_hash_entry *h | |
4012 | = (struct elf_link_hash_entry *) *slot; | |
4013 | struct bfd_link_info *info | |
4014 | = (struct bfd_link_info *) inf; | |
4015 | ||
4016 | return elf64_x86_64_finish_dynamic_symbol (info->output_bfd, | |
4017 | info, h, NULL); | |
4018 | } | |
4019 | ||
c434dee6 AJ |
4020 | /* Used to decide how to sort relocs in an optimal manner for the |
4021 | dynamic linker, before writing them out. */ | |
4022 | ||
4023 | static enum elf_reloc_type_class | |
27482721 | 4024 | elf64_x86_64_reloc_type_class (const Elf_Internal_Rela *rela) |
c434dee6 AJ |
4025 | { |
4026 | switch ((int) ELF64_R_TYPE (rela->r_info)) | |
4027 | { | |
4028 | case R_X86_64_RELATIVE: | |
4029 | return reloc_class_relative; | |
4030 | case R_X86_64_JUMP_SLOT: | |
4031 | return reloc_class_plt; | |
4032 | case R_X86_64_COPY: | |
4033 | return reloc_class_copy; | |
4034 | default: | |
4035 | return reloc_class_normal; | |
4036 | } | |
4037 | } | |
4038 | ||
70256ad8 AJ |
4039 | /* Finish up the dynamic sections. */ |
4040 | ||
b34976b6 | 4041 | static bfd_boolean |
27482721 | 4042 | elf64_x86_64_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
70256ad8 | 4043 | { |
c434dee6 | 4044 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
4045 | bfd *dynobj; |
4046 | asection *sdyn; | |
70256ad8 | 4047 | |
c434dee6 | 4048 | htab = elf64_x86_64_hash_table (info); |
4dfe6ac6 NC |
4049 | if (htab == NULL) |
4050 | return FALSE; | |
4051 | ||
c434dee6 | 4052 | dynobj = htab->elf.dynobj; |
70256ad8 AJ |
4053 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
4054 | ||
c434dee6 | 4055 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 4056 | { |
70256ad8 AJ |
4057 | Elf64_External_Dyn *dyncon, *dynconend; |
4058 | ||
6de2ae4a | 4059 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 4060 | abort (); |
70256ad8 AJ |
4061 | |
4062 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
eea6121a | 4063 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); |
70256ad8 AJ |
4064 | for (; dyncon < dynconend; dyncon++) |
4065 | { | |
4066 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
4067 | asection *s; |
4068 | ||
4069 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); | |
4070 | ||
4071 | switch (dyn.d_tag) | |
4072 | { | |
4073 | default: | |
053579d7 | 4074 | continue; |
70256ad8 AJ |
4075 | |
4076 | case DT_PLTGOT: | |
6de2ae4a | 4077 | s = htab->elf.sgotplt; |
8c37241b | 4078 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 4079 | break; |
70256ad8 AJ |
4080 | |
4081 | case DT_JMPREL: | |
6de2ae4a | 4082 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 4083 | break; |
70256ad8 | 4084 | |
c434dee6 | 4085 | case DT_PLTRELSZ: |
6de2ae4a | 4086 | s = htab->elf.srelplt->output_section; |
eea6121a | 4087 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
4088 | break; |
4089 | ||
4090 | case DT_RELASZ: | |
c434dee6 AJ |
4091 | /* The procedure linkage table relocs (DT_JMPREL) should |
4092 | not be included in the overall relocs (DT_RELA). | |
4093 | Therefore, we override the DT_RELASZ entry here to | |
4094 | make it not include the JMPREL relocs. Since the | |
4095 | linker script arranges for .rela.plt to follow all | |
4096 | other relocation sections, we don't have to worry | |
4097 | about changing the DT_RELA entry. */ | |
6de2ae4a | 4098 | if (htab->elf.srelplt != NULL) |
70256ad8 | 4099 | { |
6de2ae4a | 4100 | s = htab->elf.srelplt->output_section; |
eea6121a | 4101 | dyn.d_un.d_val -= s->size; |
70256ad8 AJ |
4102 | } |
4103 | break; | |
67a4f2b7 AO |
4104 | |
4105 | case DT_TLSDESC_PLT: | |
6de2ae4a | 4106 | s = htab->elf.splt; |
67a4f2b7 AO |
4107 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
4108 | + htab->tlsdesc_plt; | |
4109 | break; | |
4110 | ||
4111 | case DT_TLSDESC_GOT: | |
6de2ae4a | 4112 | s = htab->elf.sgot; |
67a4f2b7 AO |
4113 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
4114 | + htab->tlsdesc_got; | |
4115 | break; | |
70256ad8 | 4116 | } |
c434dee6 | 4117 | |
70256ad8 AJ |
4118 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
4119 | } | |
4120 | ||
c434dee6 | 4121 | /* Fill in the special first entry in the procedure linkage table. */ |
6de2ae4a | 4122 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 4123 | { |
653165cc | 4124 | /* Fill in the first entry in the procedure linkage table. */ |
6de2ae4a | 4125 | memcpy (htab->elf.splt->contents, elf64_x86_64_plt0_entry, |
c434dee6 | 4126 | PLT_ENTRY_SIZE); |
653165cc AJ |
4127 | /* Add offset for pushq GOT+8(%rip), since the instruction |
4128 | uses 6 bytes subtract this value. */ | |
4129 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4130 | (htab->elf.sgotplt->output_section->vma |
4131 | + htab->elf.sgotplt->output_offset | |
653165cc | 4132 | + 8 |
6de2ae4a L |
4133 | - htab->elf.splt->output_section->vma |
4134 | - htab->elf.splt->output_offset | |
653165cc | 4135 | - 6), |
6de2ae4a | 4136 | htab->elf.splt->contents + 2); |
653165cc AJ |
4137 | /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to |
4138 | the end of the instruction. */ | |
4139 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4140 | (htab->elf.sgotplt->output_section->vma |
4141 | + htab->elf.sgotplt->output_offset | |
653165cc | 4142 | + 16 |
6de2ae4a L |
4143 | - htab->elf.splt->output_section->vma |
4144 | - htab->elf.splt->output_offset | |
653165cc | 4145 | - 12), |
6de2ae4a | 4146 | htab->elf.splt->contents + 8); |
653165cc | 4147 | |
6de2ae4a | 4148 | elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize = |
c434dee6 | 4149 | PLT_ENTRY_SIZE; |
67a4f2b7 AO |
4150 | |
4151 | if (htab->tlsdesc_plt) | |
4152 | { | |
4153 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6de2ae4a | 4154 | htab->elf.sgot->contents + htab->tlsdesc_got); |
67a4f2b7 | 4155 | |
6de2ae4a | 4156 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, |
67a4f2b7 AO |
4157 | elf64_x86_64_plt0_entry, |
4158 | PLT_ENTRY_SIZE); | |
4159 | ||
4160 | /* Add offset for pushq GOT+8(%rip), since the | |
4161 | instruction uses 6 bytes subtract this value. */ | |
4162 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4163 | (htab->elf.sgotplt->output_section->vma |
4164 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 4165 | + 8 |
6de2ae4a L |
4166 | - htab->elf.splt->output_section->vma |
4167 | - htab->elf.splt->output_offset | |
67a4f2b7 AO |
4168 | - htab->tlsdesc_plt |
4169 | - 6), | |
6de2ae4a | 4170 | htab->elf.splt->contents + htab->tlsdesc_plt + 2); |
67a4f2b7 AO |
4171 | /* Add offset for jmp *GOT+TDG(%rip), where TGD stands for |
4172 | htab->tlsdesc_got. The 12 is the offset to the end of | |
4173 | the instruction. */ | |
4174 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4175 | (htab->elf.sgot->output_section->vma |
4176 | + htab->elf.sgot->output_offset | |
67a4f2b7 | 4177 | + htab->tlsdesc_got |
6de2ae4a L |
4178 | - htab->elf.splt->output_section->vma |
4179 | - htab->elf.splt->output_offset | |
67a4f2b7 AO |
4180 | - htab->tlsdesc_plt |
4181 | - 12), | |
6de2ae4a | 4182 | htab->elf.splt->contents + htab->tlsdesc_plt + 8); |
67a4f2b7 | 4183 | } |
70256ad8 | 4184 | } |
70256ad8 AJ |
4185 | } |
4186 | ||
6de2ae4a | 4187 | if (htab->elf.sgotplt) |
70256ad8 | 4188 | { |
c434dee6 | 4189 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 4190 | if (htab->elf.sgotplt->size > 0) |
c434dee6 AJ |
4191 | { |
4192 | /* Set the first entry in the global offset table to the address of | |
4193 | the dynamic section. */ | |
4194 | if (sdyn == NULL) | |
6de2ae4a | 4195 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); |
c434dee6 AJ |
4196 | else |
4197 | bfd_put_64 (output_bfd, | |
4198 | sdyn->output_section->vma + sdyn->output_offset, | |
6de2ae4a | 4199 | htab->elf.sgotplt->contents); |
c434dee6 | 4200 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
6de2ae4a L |
4201 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); |
4202 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
c434dee6 | 4203 | } |
70256ad8 | 4204 | |
6de2ae4a | 4205 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = |
c434dee6 AJ |
4206 | GOT_ENTRY_SIZE; |
4207 | } | |
70256ad8 | 4208 | |
6de2ae4a L |
4209 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
4210 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
4211 | = GOT_ENTRY_SIZE; |
4212 | ||
c25bc9fc L |
4213 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
4214 | htab_traverse (htab->loc_hash_table, | |
4215 | elf64_x86_64_finish_local_dynamic_symbol, | |
4216 | info); | |
4217 | ||
b34976b6 | 4218 | return TRUE; |
8d88c4ca NC |
4219 | } |
4220 | ||
4c45e5c9 JJ |
4221 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
4222 | or (bfd_vma) -1 if it should not be included. */ | |
4223 | ||
4224 | static bfd_vma | |
4225 | elf64_x86_64_plt_sym_val (bfd_vma i, const asection *plt, | |
4226 | const arelent *rel ATTRIBUTE_UNUSED) | |
4227 | { | |
4228 | return plt->vma + (i + 1) * PLT_ENTRY_SIZE; | |
4229 | } | |
8df9fc9d | 4230 | |
d2b2c203 DJ |
4231 | /* Handle an x86-64 specific section when reading an object file. This |
4232 | is called when elfcode.h finds a section with an unknown type. */ | |
4233 | ||
4234 | static bfd_boolean | |
6dc132d9 L |
4235 | elf64_x86_64_section_from_shdr (bfd *abfd, |
4236 | Elf_Internal_Shdr *hdr, | |
4237 | const char *name, | |
4238 | int shindex) | |
d2b2c203 DJ |
4239 | { |
4240 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
4241 | return FALSE; | |
4242 | ||
6dc132d9 | 4243 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
4244 | return FALSE; |
4245 | ||
4246 | return TRUE; | |
4247 | } | |
4248 | ||
3b22753a L |
4249 | /* Hook called by the linker routine which adds symbols from an object |
4250 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
4251 | of .bss. */ | |
4252 | ||
4253 | static bfd_boolean | |
4254 | elf64_x86_64_add_symbol_hook (bfd *abfd, | |
d8045f23 | 4255 | struct bfd_link_info *info, |
3b22753a L |
4256 | Elf_Internal_Sym *sym, |
4257 | const char **namep ATTRIBUTE_UNUSED, | |
4258 | flagword *flagsp ATTRIBUTE_UNUSED, | |
d8045f23 NC |
4259 | asection **secp, |
4260 | bfd_vma *valp) | |
3b22753a L |
4261 | { |
4262 | asection *lcomm; | |
4263 | ||
4264 | switch (sym->st_shndx) | |
4265 | { | |
4266 | case SHN_X86_64_LCOMMON: | |
4267 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
4268 | if (lcomm == NULL) | |
4269 | { | |
4270 | lcomm = bfd_make_section_with_flags (abfd, | |
4271 | "LARGE_COMMON", | |
4272 | (SEC_ALLOC | |
4273 | | SEC_IS_COMMON | |
4274 | | SEC_LINKER_CREATED)); | |
4275 | if (lcomm == NULL) | |
4276 | return FALSE; | |
4277 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
4278 | } | |
4279 | *secp = lcomm; | |
4280 | *valp = sym->st_size; | |
c35bdf6e | 4281 | return TRUE; |
3b22753a | 4282 | } |
d8045f23 | 4283 | |
c16153ae L |
4284 | if ((abfd->flags & DYNAMIC) == 0 |
4285 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
d8045f23 NC |
4286 | elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE; |
4287 | ||
3b22753a L |
4288 | return TRUE; |
4289 | } | |
4290 | ||
4291 | ||
4292 | /* Given a BFD section, try to locate the corresponding ELF section | |
4293 | index. */ | |
4294 | ||
4295 | static bfd_boolean | |
4296 | elf64_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, | |
91d6fa6a | 4297 | asection *sec, int *index_return) |
3b22753a L |
4298 | { |
4299 | if (sec == &_bfd_elf_large_com_section) | |
4300 | { | |
91d6fa6a | 4301 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
4302 | return TRUE; |
4303 | } | |
4304 | return FALSE; | |
4305 | } | |
4306 | ||
4307 | /* Process a symbol. */ | |
4308 | ||
4309 | static void | |
4310 | elf64_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, | |
4311 | asymbol *asym) | |
4312 | { | |
4313 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
4314 | ||
4315 | switch (elfsym->internal_elf_sym.st_shndx) | |
4316 | { | |
4317 | case SHN_X86_64_LCOMMON: | |
4318 | asym->section = &_bfd_elf_large_com_section; | |
4319 | asym->value = elfsym->internal_elf_sym.st_size; | |
4320 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
4321 | asym->flags &= ~BSF_GLOBAL; | |
4322 | break; | |
4323 | } | |
4324 | } | |
4325 | ||
4326 | static bfd_boolean | |
4327 | elf64_x86_64_common_definition (Elf_Internal_Sym *sym) | |
4328 | { | |
4329 | return (sym->st_shndx == SHN_COMMON | |
4330 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
4331 | } | |
4332 | ||
4333 | static unsigned int | |
4334 | elf64_x86_64_common_section_index (asection *sec) | |
4335 | { | |
4336 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
4337 | return SHN_COMMON; | |
4338 | else | |
4339 | return SHN_X86_64_LCOMMON; | |
4340 | } | |
4341 | ||
4342 | static asection * | |
4343 | elf64_x86_64_common_section (asection *sec) | |
4344 | { | |
4345 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
4346 | return bfd_com_section_ptr; | |
4347 | else | |
4348 | return &_bfd_elf_large_com_section; | |
4349 | } | |
4350 | ||
4351 | static bfd_boolean | |
4352 | elf64_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
4353 | struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED, | |
4354 | struct elf_link_hash_entry *h, | |
4355 | Elf_Internal_Sym *sym, | |
00492999 | 4356 | asection **psec, |
3b22753a L |
4357 | bfd_vma *pvalue ATTRIBUTE_UNUSED, |
4358 | unsigned int *pold_alignment ATTRIBUTE_UNUSED, | |
4359 | bfd_boolean *skip ATTRIBUTE_UNUSED, | |
4360 | bfd_boolean *override ATTRIBUTE_UNUSED, | |
4361 | bfd_boolean *type_change_ok ATTRIBUTE_UNUSED, | |
4362 | bfd_boolean *size_change_ok ATTRIBUTE_UNUSED, | |
4363 | bfd_boolean *newdef ATTRIBUTE_UNUSED, | |
4364 | bfd_boolean *newdyn, | |
4365 | bfd_boolean *newdyncommon ATTRIBUTE_UNUSED, | |
4366 | bfd_boolean *newweak ATTRIBUTE_UNUSED, | |
4367 | bfd *abfd ATTRIBUTE_UNUSED, | |
4368 | asection **sec, | |
4369 | bfd_boolean *olddef ATTRIBUTE_UNUSED, | |
4370 | bfd_boolean *olddyn, | |
4371 | bfd_boolean *olddyncommon ATTRIBUTE_UNUSED, | |
4372 | bfd_boolean *oldweak ATTRIBUTE_UNUSED, | |
00492999 | 4373 | bfd *oldbfd, |
3b22753a L |
4374 | asection **oldsec) |
4375 | { | |
4376 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
4377 | normal common symbol. We turn the large common symbol into a |
4378 | normal one. */ | |
3b22753a L |
4379 | if (!*olddyn |
4380 | && h->root.type == bfd_link_hash_common | |
4381 | && !*newdyn | |
4382 | && bfd_is_com_section (*sec) | |
00492999 | 4383 | && *oldsec != *sec) |
3b22753a | 4384 | { |
00492999 L |
4385 | if (sym->st_shndx == SHN_COMMON |
4386 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0) | |
4387 | { | |
4388 | h->root.u.c.p->section | |
4389 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
4390 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
4391 | } | |
4392 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
4393 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0) | |
9a2e389a | 4394 | *psec = *sec = bfd_com_section_ptr; |
3b22753a L |
4395 | } |
4396 | ||
4397 | return TRUE; | |
4398 | } | |
4399 | ||
4400 | static int | |
a6b96beb AM |
4401 | elf64_x86_64_additional_program_headers (bfd *abfd, |
4402 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
4403 | { |
4404 | asection *s; | |
9a2e389a | 4405 | int count = 0; |
3b22753a L |
4406 | |
4407 | /* Check to see if we need a large readonly segment. */ | |
4408 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
4409 | if (s && (s->flags & SEC_LOAD)) | |
4410 | count++; | |
4411 | ||
4412 | /* Check to see if we need a large data segment. Since .lbss sections | |
4413 | is placed right after the .bss section, there should be no need for | |
4414 | a large data segment just because of .lbss. */ | |
4415 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
4416 | if (s && (s->flags & SEC_LOAD)) | |
4417 | count++; | |
4418 | ||
4419 | return count; | |
4420 | } | |
4421 | ||
fdc90cb4 JJ |
4422 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
4423 | ||
4424 | static bfd_boolean | |
4425 | elf64_x86_64_hash_symbol (struct elf_link_hash_entry *h) | |
4426 | { | |
4427 | if (h->plt.offset != (bfd_vma) -1 | |
4428 | && !h->def_regular | |
4429 | && !h->pointer_equality_needed) | |
4430 | return FALSE; | |
4431 | ||
4432 | return _bfd_elf_hash_symbol (h); | |
4433 | } | |
4434 | ||
9a2e389a | 4435 | static const struct bfd_elf_special_section |
3b22753a L |
4436 | elf64_x86_64_special_sections[]= |
4437 | { | |
0112cd26 NC |
4438 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
4439 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
4440 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
4441 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
4442 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
4443 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
4444 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
4445 | }; |
4446 | ||
70256ad8 AJ |
4447 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec |
4448 | #define TARGET_LITTLE_NAME "elf64-x86-64" | |
4449 | #define ELF_ARCH bfd_arch_i386 | |
4450 | #define ELF_MACHINE_CODE EM_X86_64 | |
f7661549 | 4451 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 4452 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 4453 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
4454 | |
4455 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 4456 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
4457 | #define elf_backend_want_got_plt 1 |
4458 | #define elf_backend_plt_readonly 1 | |
4459 | #define elf_backend_want_plt_sym 0 | |
4460 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 4461 | #define elf_backend_rela_normal 1 |
70256ad8 AJ |
4462 | |
4463 | #define elf_info_to_howto elf64_x86_64_info_to_howto | |
70256ad8 | 4464 | |
70256ad8 AJ |
4465 | #define bfd_elf64_bfd_link_hash_table_create \ |
4466 | elf64_x86_64_link_hash_table_create | |
c25bc9fc L |
4467 | #define bfd_elf64_bfd_link_hash_table_free \ |
4468 | elf64_x86_64_link_hash_table_free | |
407443a3 | 4469 | #define bfd_elf64_bfd_reloc_type_lookup elf64_x86_64_reloc_type_lookup |
157090f7 AM |
4470 | #define bfd_elf64_bfd_reloc_name_lookup \ |
4471 | elf64_x86_64_reloc_name_lookup | |
70256ad8 AJ |
4472 | |
4473 | #define elf_backend_adjust_dynamic_symbol elf64_x86_64_adjust_dynamic_symbol | |
13285a1b | 4474 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
70256ad8 | 4475 | #define elf_backend_check_relocs elf64_x86_64_check_relocs |
c434dee6 AJ |
4476 | #define elf_backend_copy_indirect_symbol elf64_x86_64_copy_indirect_symbol |
4477 | #define elf_backend_create_dynamic_sections elf64_x86_64_create_dynamic_sections | |
4478 | #define elf_backend_finish_dynamic_sections elf64_x86_64_finish_dynamic_sections | |
70256ad8 AJ |
4479 | #define elf_backend_finish_dynamic_symbol elf64_x86_64_finish_dynamic_symbol |
4480 | #define elf_backend_gc_mark_hook elf64_x86_64_gc_mark_hook | |
4481 | #define elf_backend_gc_sweep_hook elf64_x86_64_gc_sweep_hook | |
3bab7989 ML |
4482 | #define elf_backend_grok_prstatus elf64_x86_64_grok_prstatus |
4483 | #define elf_backend_grok_psinfo elf64_x86_64_grok_psinfo | |
c434dee6 | 4484 | #define elf_backend_reloc_type_class elf64_x86_64_reloc_type_class |
70256ad8 AJ |
4485 | #define elf_backend_relocate_section elf64_x86_64_relocate_section |
4486 | #define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections | |
67a4f2b7 | 4487 | #define elf_backend_always_size_sections elf64_x86_64_always_size_sections |
74541ad4 | 4488 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
4c45e5c9 | 4489 | #define elf_backend_plt_sym_val elf64_x86_64_plt_sym_val |
407443a3 | 4490 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
bffbf940 | 4491 | #define bfd_elf64_mkobject elf64_x86_64_mkobject |
8d88c4ca | 4492 | |
d2b2c203 DJ |
4493 | #define elf_backend_section_from_shdr \ |
4494 | elf64_x86_64_section_from_shdr | |
4495 | ||
3b22753a L |
4496 | #define elf_backend_section_from_bfd_section \ |
4497 | elf64_x86_64_elf_section_from_bfd_section | |
4498 | #define elf_backend_add_symbol_hook \ | |
4499 | elf64_x86_64_add_symbol_hook | |
4500 | #define elf_backend_symbol_processing \ | |
4501 | elf64_x86_64_symbol_processing | |
4502 | #define elf_backend_common_section_index \ | |
4503 | elf64_x86_64_common_section_index | |
4504 | #define elf_backend_common_section \ | |
4505 | elf64_x86_64_common_section | |
4506 | #define elf_backend_common_definition \ | |
4507 | elf64_x86_64_common_definition | |
4508 | #define elf_backend_merge_symbol \ | |
4509 | elf64_x86_64_merge_symbol | |
4510 | #define elf_backend_special_sections \ | |
4511 | elf64_x86_64_special_sections | |
4512 | #define elf_backend_additional_program_headers \ | |
4513 | elf64_x86_64_additional_program_headers | |
fdc90cb4 JJ |
4514 | #define elf_backend_hash_symbol \ |
4515 | elf64_x86_64_hash_symbol | |
3b22753a | 4516 | |
d8045f23 NC |
4517 | #undef elf_backend_post_process_headers |
4518 | #define elf_backend_post_process_headers _bfd_elf_set_osabi | |
4519 | ||
8d88c4ca | 4520 | #include "elf64-target.h" |
9d7cbccd NC |
4521 | |
4522 | /* FreeBSD support. */ | |
4523 | ||
4524 | #undef TARGET_LITTLE_SYM | |
4525 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec | |
4526 | #undef TARGET_LITTLE_NAME | |
4527 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
4528 | ||
d1036acb L |
4529 | #undef ELF_OSABI |
4530 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 4531 | |
9d7cbccd NC |
4532 | #undef elf64_bed |
4533 | #define elf64_bed elf64_x86_64_fbsd_bed | |
4534 | ||
4535 | #include "elf64-target.h" | |
8a9036a4 | 4536 | |
a6cc6b3b RO |
4537 | /* Solaris 2 support. */ |
4538 | ||
4539 | #undef TARGET_LITTLE_SYM | |
4540 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec | |
4541 | #undef TARGET_LITTLE_NAME | |
4542 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
4543 | ||
4544 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
4545 | objects won't be recognized. */ | |
4546 | #undef ELF_OSABI | |
4547 | ||
4548 | #undef elf64_bed | |
4549 | #define elf64_bed elf64_x86_64_sol2_bed | |
4550 | ||
4551 | /* The Solaris 2 ABI requires a plt symbol on all platforms. | |
4552 | ||
4553 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
4554 | File, p.63. */ | |
4555 | #undef elf_backend_want_plt_sym | |
4556 | #define elf_backend_want_plt_sym 1 | |
4557 | ||
4558 | #include "elf64-target.h" | |
4559 | ||
8a9036a4 L |
4560 | /* Intel L1OM support. */ |
4561 | ||
4562 | static bfd_boolean | |
4563 | elf64_l1om_elf_object_p (bfd *abfd) | |
4564 | { | |
4565 | /* Set the right machine number for an L1OM elf64 file. */ | |
4566 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
4567 | return TRUE; | |
4568 | } | |
4569 | ||
4570 | #undef TARGET_LITTLE_SYM | |
4571 | #define TARGET_LITTLE_SYM bfd_elf64_l1om_vec | |
4572 | #undef TARGET_LITTLE_NAME | |
4573 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
4574 | #undef ELF_ARCH | |
4575 | #define ELF_ARCH bfd_arch_l1om | |
4576 | ||
4577 | #undef ELF_MACHINE_CODE | |
4578 | #define ELF_MACHINE_CODE EM_L1OM | |
4579 | ||
4580 | #undef ELF_OSABI | |
4581 | ||
4582 | #undef elf64_bed | |
4583 | #define elf64_bed elf64_l1om_bed | |
4584 | ||
4585 | #undef elf_backend_object_p | |
4586 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
4587 | ||
4588 | #undef elf_backend_post_process_headers | |
4589 | ||
4590 | #include "elf64-target.h" | |
4591 | ||
4592 | /* FreeBSD L1OM support. */ | |
4593 | ||
4594 | #undef TARGET_LITTLE_SYM | |
4595 | #define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec | |
4596 | #undef TARGET_LITTLE_NAME | |
4597 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
4598 | ||
4599 | #undef ELF_OSABI | |
4600 | #define ELF_OSABI ELFOSABI_FREEBSD | |
4601 | ||
4602 | #undef elf64_bed | |
4603 | #define elf64_bed elf64_l1om_fbsd_bed | |
4604 | ||
4605 | #undef elf_backend_post_process_headers | |
4606 | #define elf_backend_post_process_headers _bfd_elf_set_osabi | |
4607 | ||
4608 | #include "elf64-target.h" |