Commit | Line | Data |
---|---|---|
8d88c4ca | 1 | /* X86-64 specific support for 64-bit ELF |
0ffa91dd | 2 | Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
3eb128b2 | 3 | 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 \ | |
454 | && elf_object_id (bfd) == X86_64_ELF_TDATA) | |
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), | |
460 | X86_64_ELF_TDATA); | |
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 | |
67a4f2b7 AO |
473 | /* The offset into splt of the PLT entry for the TLS descriptor |
474 | resolver. Special values are 0, if not necessary (or not found | |
475 | to be necessary yet), and -1 if needed but not determined | |
476 | yet. */ | |
477 | bfd_vma tlsdesc_plt; | |
478 | /* The offset into sgot of the GOT entry used by the PLT entry | |
479 | above. */ | |
480 | bfd_vma tlsdesc_got; | |
481 | ||
bffbf940 JJ |
482 | union { |
483 | bfd_signed_vma refcount; | |
484 | bfd_vma offset; | |
485 | } tls_ld_got; | |
486 | ||
67a4f2b7 AO |
487 | /* The amount of space used by the jump slots in the GOT. */ |
488 | bfd_vma sgotplt_jump_table_size; | |
489 | ||
87d72d41 AM |
490 | /* Small local sym cache. */ |
491 | struct sym_cache sym_cache; | |
9f03412a AO |
492 | |
493 | /* _TLS_MODULE_BASE_ symbol. */ | |
494 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
495 | |
496 | /* Used by local STT_GNU_IFUNC symbols. */ | |
497 | htab_t loc_hash_table; | |
498 | void *loc_hash_memory; | |
c434dee6 | 499 | }; |
70256ad8 AJ |
500 | |
501 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca NC |
502 | |
503 | #define elf64_x86_64_hash_table(p) \ | |
504 | ((struct elf64_x86_64_link_hash_table *) ((p)->hash)) | |
505 | ||
67a4f2b7 | 506 | #define elf64_x86_64_compute_jump_table_size(htab) \ |
6de2ae4a | 507 | ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE) |
67a4f2b7 | 508 | |
407443a3 | 509 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
510 | |
511 | static struct bfd_hash_entry * | |
eb4ff4d6 L |
512 | elf64_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry, |
513 | struct bfd_hash_table *table, | |
514 | const char *string) | |
70256ad8 | 515 | { |
70256ad8 | 516 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
517 | subclass. */ |
518 | if (entry == NULL) | |
519 | { | |
520 | entry = bfd_hash_allocate (table, | |
521 | sizeof (struct elf64_x86_64_link_hash_entry)); | |
522 | if (entry == NULL) | |
523 | return entry; | |
524 | } | |
70256ad8 AJ |
525 | |
526 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
527 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
528 | if (entry != NULL) | |
70256ad8 | 529 | { |
c434dee6 AJ |
530 | struct elf64_x86_64_link_hash_entry *eh; |
531 | ||
532 | eh = (struct elf64_x86_64_link_hash_entry *) entry; | |
533 | eh->dyn_relocs = NULL; | |
bffbf940 | 534 | eh->tls_type = GOT_UNKNOWN; |
67a4f2b7 | 535 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
536 | } |
537 | ||
c434dee6 | 538 | return entry; |
70256ad8 AJ |
539 | } |
540 | ||
c25bc9fc L |
541 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
542 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
543 | as global symbol. We reuse indx and dynstr_index for local symbol | |
544 | hash since they aren't used by global symbols in this backend. */ | |
545 | ||
546 | static hashval_t | |
547 | elf64_x86_64_local_htab_hash (const void *ptr) | |
548 | { | |
549 | struct elf_link_hash_entry *h | |
550 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 551 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
552 | } |
553 | ||
554 | /* Compare local hash entries. */ | |
555 | ||
556 | static int | |
557 | elf64_x86_64_local_htab_eq (const void *ptr1, const void *ptr2) | |
558 | { | |
559 | struct elf_link_hash_entry *h1 | |
560 | = (struct elf_link_hash_entry *) ptr1; | |
561 | struct elf_link_hash_entry *h2 | |
562 | = (struct elf_link_hash_entry *) ptr2; | |
563 | ||
564 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
565 | } | |
566 | ||
567 | /* Find and/or create a hash entry for local symbol. */ | |
568 | ||
569 | static struct elf_link_hash_entry * | |
570 | elf64_x86_64_get_local_sym_hash (struct elf64_x86_64_link_hash_table *htab, | |
571 | bfd *abfd, const Elf_Internal_Rela *rel, | |
572 | bfd_boolean create) | |
573 | { | |
574 | struct elf64_x86_64_link_hash_entry e, *ret; | |
575 | asection *sec = abfd->sections; | |
d2149d72 L |
576 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
577 | ELF64_R_SYM (rel->r_info)); | |
c25bc9fc L |
578 | void **slot; |
579 | ||
580 | e.elf.indx = sec->id; | |
581 | e.elf.dynstr_index = ELF64_R_SYM (rel->r_info); | |
582 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, | |
583 | create ? INSERT : NO_INSERT); | |
584 | ||
585 | if (!slot) | |
586 | return NULL; | |
587 | ||
588 | if (*slot) | |
589 | { | |
590 | ret = (struct elf64_x86_64_link_hash_entry *) *slot; | |
591 | return &ret->elf; | |
592 | } | |
593 | ||
594 | ret = (struct elf64_x86_64_link_hash_entry *) | |
595 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, | |
596 | sizeof (struct elf64_x86_64_link_hash_entry)); | |
597 | if (ret) | |
598 | { | |
599 | memset (ret, 0, sizeof (*ret)); | |
600 | ret->elf.indx = sec->id; | |
601 | ret->elf.dynstr_index = ELF64_R_SYM (rel->r_info); | |
602 | ret->elf.dynindx = -1; | |
603 | ret->elf.plt.offset = (bfd_vma) -1; | |
604 | ret->elf.got.offset = (bfd_vma) -1; | |
605 | *slot = ret; | |
606 | } | |
607 | return &ret->elf; | |
608 | } | |
609 | ||
8d88c4ca NC |
610 | /* Create an X86-64 ELF linker hash table. */ |
611 | ||
612 | static struct bfd_link_hash_table * | |
27482721 | 613 | elf64_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca NC |
614 | { |
615 | struct elf64_x86_64_link_hash_table *ret; | |
dc810e39 | 616 | bfd_size_type amt = sizeof (struct elf64_x86_64_link_hash_table); |
8d88c4ca | 617 | |
e2d34d7d | 618 | ret = (struct elf64_x86_64_link_hash_table *) bfd_malloc (amt); |
c434dee6 | 619 | if (ret == NULL) |
8d88c4ca NC |
620 | return NULL; |
621 | ||
eb4ff4d6 L |
622 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
623 | elf64_x86_64_link_hash_newfunc, | |
66eb6687 | 624 | sizeof (struct elf64_x86_64_link_hash_entry))) |
8d88c4ca | 625 | { |
e2d34d7d | 626 | free (ret); |
8d88c4ca NC |
627 | return NULL; |
628 | } | |
629 | ||
c434dee6 AJ |
630 | ret->sdynbss = NULL; |
631 | ret->srelbss = NULL; | |
87d72d41 | 632 | ret->sym_cache.abfd = NULL; |
67a4f2b7 AO |
633 | ret->tlsdesc_plt = 0; |
634 | ret->tlsdesc_got = 0; | |
bffbf940 | 635 | ret->tls_ld_got.refcount = 0; |
67a4f2b7 | 636 | ret->sgotplt_jump_table_size = 0; |
9f03412a | 637 | ret->tls_module_base = NULL; |
c434dee6 | 638 | |
c25bc9fc L |
639 | ret->loc_hash_table = htab_try_create (1024, |
640 | elf64_x86_64_local_htab_hash, | |
641 | elf64_x86_64_local_htab_eq, | |
642 | NULL); | |
643 | ret->loc_hash_memory = objalloc_create (); | |
644 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
645 | { | |
646 | free (ret); | |
647 | return NULL; | |
648 | } | |
649 | ||
c434dee6 AJ |
650 | return &ret->elf.root; |
651 | } | |
652 | ||
c25bc9fc L |
653 | /* Destroy an X86-64 ELF linker hash table. */ |
654 | ||
655 | static void | |
656 | elf64_x86_64_link_hash_table_free (struct bfd_link_hash_table *hash) | |
657 | { | |
658 | struct elf64_x86_64_link_hash_table *htab | |
659 | = (struct elf64_x86_64_link_hash_table *) hash; | |
660 | ||
661 | if (htab->loc_hash_table) | |
662 | htab_delete (htab->loc_hash_table); | |
663 | if (htab->loc_hash_memory) | |
664 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
665 | _bfd_generic_link_hash_table_free (hash); | |
666 | } | |
667 | ||
c434dee6 AJ |
668 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
669 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
670 | hash table. */ | |
671 | ||
b34976b6 | 672 | static bfd_boolean |
27482721 | 673 | elf64_x86_64_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
c434dee6 AJ |
674 | { |
675 | struct elf64_x86_64_link_hash_table *htab; | |
676 | ||
c434dee6 | 677 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 678 | return FALSE; |
c434dee6 | 679 | |
6de2ae4a | 680 | htab = elf64_x86_64_hash_table (info); |
c434dee6 AJ |
681 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); |
682 | if (!info->shared) | |
683 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
684 | ||
6de2ae4a | 685 | if (!htab->sdynbss |
c434dee6 AJ |
686 | || (!info->shared && !htab->srelbss)) |
687 | abort (); | |
688 | ||
b34976b6 | 689 | return TRUE; |
c434dee6 AJ |
690 | } |
691 | ||
692 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
693 | ||
694 | static void | |
fcfa13d2 | 695 | elf64_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
27482721 AJ |
696 | struct elf_link_hash_entry *dir, |
697 | struct elf_link_hash_entry *ind) | |
c434dee6 AJ |
698 | { |
699 | struct elf64_x86_64_link_hash_entry *edir, *eind; | |
700 | ||
701 | edir = (struct elf64_x86_64_link_hash_entry *) dir; | |
702 | eind = (struct elf64_x86_64_link_hash_entry *) ind; | |
703 | ||
704 | if (eind->dyn_relocs != NULL) | |
705 | { | |
706 | if (edir->dyn_relocs != NULL) | |
707 | { | |
e03a8ed8 L |
708 | struct elf_dyn_relocs **pp; |
709 | struct elf_dyn_relocs *p; | |
c434dee6 | 710 | |
fcfa13d2 | 711 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
712 | list. Merge any entries against the same section. */ |
713 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
714 | { | |
e03a8ed8 | 715 | struct elf_dyn_relocs *q; |
c434dee6 AJ |
716 | |
717 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
718 | if (q->sec == p->sec) | |
719 | { | |
720 | q->pc_count += p->pc_count; | |
721 | q->count += p->count; | |
722 | *pp = p->next; | |
723 | break; | |
724 | } | |
725 | if (q == NULL) | |
726 | pp = &p->next; | |
727 | } | |
728 | *pp = edir->dyn_relocs; | |
729 | } | |
730 | ||
731 | edir->dyn_relocs = eind->dyn_relocs; | |
732 | eind->dyn_relocs = NULL; | |
733 | } | |
734 | ||
bffbf940 JJ |
735 | if (ind->root.type == bfd_link_hash_indirect |
736 | && dir->got.refcount <= 0) | |
737 | { | |
738 | edir->tls_type = eind->tls_type; | |
739 | eind->tls_type = GOT_UNKNOWN; | |
740 | } | |
741 | ||
d40d037c AJ |
742 | if (ELIMINATE_COPY_RELOCS |
743 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
744 | && dir->dynamic_adjusted) |
745 | { | |
746 | /* If called to transfer flags for a weakdef during processing | |
747 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
748 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
749 | dir->ref_dynamic |= ind->ref_dynamic; | |
750 | dir->ref_regular |= ind->ref_regular; | |
751 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
752 | dir->needs_plt |= ind->needs_plt; | |
753 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
754 | } | |
d40d037c | 755 | else |
fcfa13d2 | 756 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
8d88c4ca NC |
757 | } |
758 | ||
b34976b6 | 759 | static bfd_boolean |
27482721 | 760 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 761 | { |
8d88c4ca NC |
762 | /* Set the right machine number for an x86-64 elf64 file. */ |
763 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 764 | return TRUE; |
8d88c4ca NC |
765 | } |
766 | ||
142411ca L |
767 | typedef union |
768 | { | |
769 | unsigned char c[2]; | |
770 | uint16_t i; | |
771 | } | |
772 | x86_64_opcode16; | |
773 | ||
774 | typedef union | |
775 | { | |
776 | unsigned char c[4]; | |
777 | uint32_t i; | |
778 | } | |
779 | x86_64_opcode32; | |
780 | ||
781 | /* Return TRUE if the TLS access code sequence support transition | |
782 | from R_TYPE. */ | |
783 | ||
784 | static bfd_boolean | |
785 | elf64_x86_64_check_tls_transition (bfd *abfd, asection *sec, | |
786 | bfd_byte *contents, | |
787 | Elf_Internal_Shdr *symtab_hdr, | |
788 | struct elf_link_hash_entry **sym_hashes, | |
789 | unsigned int r_type, | |
790 | const Elf_Internal_Rela *rel, | |
791 | const Elf_Internal_Rela *relend) | |
bffbf940 | 792 | { |
142411ca L |
793 | unsigned int val; |
794 | unsigned long r_symndx; | |
795 | struct elf_link_hash_entry *h; | |
796 | bfd_vma offset; | |
797 | ||
798 | /* Get the section contents. */ | |
799 | if (contents == NULL) | |
800 | { | |
801 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
802 | contents = elf_section_data (sec)->this_hdr.contents; | |
803 | else | |
804 | { | |
805 | /* FIXME: How to better handle error condition? */ | |
806 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
807 | return FALSE; | |
bffbf940 | 808 | |
142411ca L |
809 | /* Cache the section contents for elf_link_input_bfd. */ |
810 | elf_section_data (sec)->this_hdr.contents = contents; | |
811 | } | |
812 | } | |
813 | ||
814 | offset = rel->r_offset; | |
bffbf940 | 815 | switch (r_type) |
142411ca L |
816 | { |
817 | case R_X86_64_TLSGD: | |
818 | case R_X86_64_TLSLD: | |
819 | if ((rel + 1) >= relend) | |
820 | return FALSE; | |
821 | ||
822 | if (r_type == R_X86_64_TLSGD) | |
823 | { | |
824 | /* Check transition from GD access model. Only | |
825 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
826 | .word 0x6666; rex64; call __tls_get_addr | |
827 | can transit to different access model. */ | |
828 | ||
829 | static x86_64_opcode32 leaq = { { 0x66, 0x48, 0x8d, 0x3d } }, | |
830 | call = { { 0x66, 0x66, 0x48, 0xe8 } }; | |
831 | if (offset < 4 | |
832 | || (offset + 12) > sec->size | |
833 | || bfd_get_32 (abfd, contents + offset - 4) != leaq.i | |
834 | || bfd_get_32 (abfd, contents + offset + 4) != call.i) | |
835 | return FALSE; | |
836 | } | |
837 | else | |
838 | { | |
839 | /* Check transition from LD access model. Only | |
840 | leaq foo@tlsld(%rip), %rdi; | |
841 | call __tls_get_addr | |
842 | can transit to different access model. */ | |
843 | ||
844 | static x86_64_opcode32 ld = { { 0x48, 0x8d, 0x3d, 0xe8 } }; | |
845 | x86_64_opcode32 op; | |
846 | ||
847 | if (offset < 3 || (offset + 9) > sec->size) | |
848 | return FALSE; | |
849 | ||
850 | op.i = bfd_get_32 (abfd, contents + offset - 3); | |
851 | op.c[3] = bfd_get_8 (abfd, contents + offset + 4); | |
852 | if (op.i != ld.i) | |
853 | return FALSE; | |
854 | } | |
855 | ||
856 | r_symndx = ELF64_R_SYM (rel[1].r_info); | |
857 | if (r_symndx < symtab_hdr->sh_info) | |
858 | return FALSE; | |
859 | ||
860 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
c4fb387b L |
861 | /* Use strncmp to check __tls_get_addr since __tls_get_addr |
862 | may be versioned. */ | |
142411ca L |
863 | return (h != NULL |
864 | && h->root.root.string != NULL | |
865 | && (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PC32 | |
866 | || ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32) | |
c4fb387b L |
867 | && (strncmp (h->root.root.string, |
868 | "__tls_get_addr", 14) == 0)); | |
142411ca L |
869 | |
870 | case R_X86_64_GOTTPOFF: | |
871 | /* Check transition from IE access model: | |
872 | movq foo@gottpoff(%rip), %reg | |
873 | addq foo@gottpoff(%rip), %reg | |
874 | */ | |
875 | ||
876 | if (offset < 3 || (offset + 4) > sec->size) | |
877 | return FALSE; | |
878 | ||
879 | val = bfd_get_8 (abfd, contents + offset - 3); | |
880 | if (val != 0x48 && val != 0x4c) | |
881 | return FALSE; | |
882 | ||
883 | val = bfd_get_8 (abfd, contents + offset - 2); | |
884 | if (val != 0x8b && val != 0x03) | |
885 | return FALSE; | |
886 | ||
887 | val = bfd_get_8 (abfd, contents + offset - 1); | |
888 | return (val & 0xc7) == 5; | |
889 | ||
890 | case R_X86_64_GOTPC32_TLSDESC: | |
891 | /* Check transition from GDesc access model: | |
892 | leaq x@tlsdesc(%rip), %rax | |
893 | ||
894 | Make sure it's a leaq adding rip to a 32-bit offset | |
895 | into any register, although it's probably almost always | |
896 | going to be rax. */ | |
897 | ||
898 | if (offset < 3 || (offset + 4) > sec->size) | |
899 | return FALSE; | |
900 | ||
901 | val = bfd_get_8 (abfd, contents + offset - 3); | |
902 | if ((val & 0xfb) != 0x48) | |
903 | return FALSE; | |
904 | ||
905 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
906 | return FALSE; | |
907 | ||
908 | val = bfd_get_8 (abfd, contents + offset - 1); | |
909 | return (val & 0xc7) == 0x05; | |
910 | ||
911 | case R_X86_64_TLSDESC_CALL: | |
912 | /* Check transition from GDesc access model: | |
913 | call *x@tlsdesc(%rax) | |
914 | */ | |
915 | if (offset + 2 <= sec->size) | |
916 | { | |
917 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
918 | static x86_64_opcode16 call = { { 0xff, 0x10 } }; | |
919 | return bfd_get_16 (abfd, contents + offset) == call.i; | |
920 | } | |
921 | ||
922 | return FALSE; | |
923 | ||
924 | default: | |
925 | abort (); | |
926 | } | |
927 | } | |
928 | ||
929 | /* Return TRUE if the TLS access transition is OK or no transition | |
930 | will be performed. Update R_TYPE if there is a transition. */ | |
931 | ||
932 | static bfd_boolean | |
933 | elf64_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, | |
934 | asection *sec, bfd_byte *contents, | |
935 | Elf_Internal_Shdr *symtab_hdr, | |
936 | struct elf_link_hash_entry **sym_hashes, | |
937 | unsigned int *r_type, int tls_type, | |
938 | const Elf_Internal_Rela *rel, | |
939 | const Elf_Internal_Rela *relend, | |
4c544807 L |
940 | struct elf_link_hash_entry *h, |
941 | unsigned long r_symndx) | |
142411ca L |
942 | { |
943 | unsigned int from_type = *r_type; | |
944 | unsigned int to_type = from_type; | |
945 | bfd_boolean check = TRUE; | |
946 | ||
947 | switch (from_type) | |
bffbf940 JJ |
948 | { |
949 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
950 | case R_X86_64_GOTPC32_TLSDESC: |
951 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 952 | case R_X86_64_GOTTPOFF: |
142411ca L |
953 | if (!info->shared) |
954 | { | |
955 | if (h == NULL) | |
956 | to_type = R_X86_64_TPOFF32; | |
957 | else | |
958 | to_type = R_X86_64_GOTTPOFF; | |
959 | } | |
960 | ||
961 | /* When we are called from elf64_x86_64_relocate_section, | |
962 | CONTENTS isn't NULL and there may be additional transitions | |
963 | based on TLS_TYPE. */ | |
964 | if (contents != NULL) | |
965 | { | |
966 | unsigned int new_to_type = to_type; | |
967 | ||
968 | if (!info->shared | |
969 | && h != NULL | |
970 | && h->dynindx == -1 | |
971 | && tls_type == GOT_TLS_IE) | |
972 | new_to_type = R_X86_64_TPOFF32; | |
973 | ||
974 | if (to_type == R_X86_64_TLSGD | |
975 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
976 | || to_type == R_X86_64_TLSDESC_CALL) | |
977 | { | |
978 | if (tls_type == GOT_TLS_IE) | |
979 | new_to_type = R_X86_64_GOTTPOFF; | |
980 | } | |
981 | ||
982 | /* We checked the transition before when we were called from | |
983 | elf64_x86_64_check_relocs. We only want to check the new | |
984 | transition which hasn't been checked before. */ | |
985 | check = new_to_type != to_type && from_type == to_type; | |
986 | to_type = new_to_type; | |
987 | } | |
988 | ||
989 | break; | |
990 | ||
bffbf940 | 991 | case R_X86_64_TLSLD: |
142411ca L |
992 | if (!info->shared) |
993 | to_type = R_X86_64_TPOFF32; | |
994 | break; | |
995 | ||
996 | default: | |
997 | return TRUE; | |
bffbf940 JJ |
998 | } |
999 | ||
142411ca L |
1000 | /* Return TRUE if there is no transition. */ |
1001 | if (from_type == to_type) | |
1002 | return TRUE; | |
1003 | ||
1004 | /* Check if the transition can be performed. */ | |
1005 | if (check | |
1006 | && ! elf64_x86_64_check_tls_transition (abfd, sec, contents, | |
1007 | symtab_hdr, sym_hashes, | |
1008 | from_type, rel, relend)) | |
1009 | { | |
2f629d23 | 1010 | reloc_howto_type *from, *to; |
4c544807 | 1011 | const char *name; |
142411ca L |
1012 | |
1013 | from = elf64_x86_64_rtype_to_howto (abfd, from_type); | |
1014 | to = elf64_x86_64_rtype_to_howto (abfd, to_type); | |
1015 | ||
4c544807 L |
1016 | if (h) |
1017 | name = h->root.root.string; | |
1018 | else | |
1019 | { | |
1020 | Elf_Internal_Sym *isym; | |
1021 | struct elf64_x86_64_link_hash_table *htab; | |
1022 | htab = elf64_x86_64_hash_table (info); | |
1023 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1024 | abfd, r_symndx); | |
1025 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1026 | } | |
1027 | ||
142411ca L |
1028 | (*_bfd_error_handler) |
1029 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1030 | "in section `%A' failed"), | |
4c544807 | 1031 | abfd, sec, from->name, to->name, name, |
142411ca L |
1032 | (unsigned long) rel->r_offset); |
1033 | bfd_set_error (bfd_error_bad_value); | |
1034 | return FALSE; | |
1035 | } | |
1036 | ||
1037 | *r_type = to_type; | |
1038 | return TRUE; | |
bffbf940 JJ |
1039 | } |
1040 | ||
70256ad8 | 1041 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1042 | calculate needed space in the global offset table, procedure |
1043 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1044 | |
b34976b6 | 1045 | static bfd_boolean |
142411ca L |
1046 | elf64_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1047 | asection *sec, | |
27482721 | 1048 | const Elf_Internal_Rela *relocs) |
70256ad8 | 1049 | { |
c434dee6 | 1050 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1051 | Elf_Internal_Shdr *symtab_hdr; |
1052 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1053 | const Elf_Internal_Rela *rel; |
1054 | const Elf_Internal_Rela *rel_end; | |
70256ad8 AJ |
1055 | asection *sreloc; |
1056 | ||
1049f94e | 1057 | if (info->relocatable) |
b34976b6 | 1058 | return TRUE; |
70256ad8 | 1059 | |
0ffa91dd NC |
1060 | BFD_ASSERT (is_x86_64_elf (abfd)); |
1061 | ||
c434dee6 | 1062 | htab = elf64_x86_64_hash_table (info); |
0ffa91dd | 1063 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1064 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1065 | |
c434dee6 | 1066 | sreloc = NULL; |
cbe950e9 | 1067 | |
70256ad8 AJ |
1068 | rel_end = relocs + sec->reloc_count; |
1069 | for (rel = relocs; rel < rel_end; rel++) | |
1070 | { | |
bffbf940 | 1071 | unsigned int r_type; |
70256ad8 AJ |
1072 | unsigned long r_symndx; |
1073 | struct elf_link_hash_entry *h; | |
4c544807 L |
1074 | Elf_Internal_Sym *isym; |
1075 | const char *name; | |
70256ad8 AJ |
1076 | |
1077 | r_symndx = ELF64_R_SYM (rel->r_info); | |
bffbf940 | 1078 | r_type = ELF64_R_TYPE (rel->r_info); |
c434dee6 AJ |
1079 | |
1080 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1081 | { | |
d003868e AM |
1082 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1083 | abfd, r_symndx); | |
b34976b6 | 1084 | return FALSE; |
c434dee6 AJ |
1085 | } |
1086 | ||
70256ad8 | 1087 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1088 | { |
1089 | /* A local symbol. */ | |
c2e61a4e L |
1090 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1091 | abfd, r_symndx); | |
1092 | if (isym == NULL) | |
1093 | return FALSE; | |
c25bc9fc L |
1094 | |
1095 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
c25bc9fc L |
1096 | if (ELF64_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
1097 | { | |
1098 | h = elf64_x86_64_get_local_sym_hash (htab, abfd, rel, | |
1099 | TRUE); | |
1100 | if (h == NULL) | |
c2e61a4e | 1101 | return FALSE; |
c25bc9fc L |
1102 | |
1103 | /* Fake a STT_GNU_IFUNC symbol. */ | |
1104 | h->type = STT_GNU_IFUNC; | |
1105 | h->def_regular = 1; | |
1106 | h->ref_regular = 1; | |
1107 | h->forced_local = 1; | |
1108 | h->root.type = bfd_link_hash_defined; | |
1109 | } | |
1110 | else | |
1111 | h = NULL; | |
1112 | } | |
70256ad8 | 1113 | else |
71cb9464 | 1114 | { |
4c544807 | 1115 | isym = NULL; |
71cb9464 L |
1116 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1117 | while (h->root.type == bfd_link_hash_indirect | |
1118 | || h->root.type == bfd_link_hash_warning) | |
1119 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1120 | } |
cbe950e9 | 1121 | |
c25bc9fc L |
1122 | if (h != NULL) |
1123 | { | |
cbe950e9 L |
1124 | /* Create the ifunc sections for static executables. If we |
1125 | never see an indirect function symbol nor we are building | |
1126 | a static executable, those sections will be empty and | |
1127 | won't appear in output. */ | |
1128 | switch (r_type) | |
1129 | { | |
1130 | default: | |
1131 | break; | |
1132 | ||
1133 | case R_X86_64_32S: | |
1134 | case R_X86_64_32: | |
1135 | case R_X86_64_64: | |
1136 | case R_X86_64_PC32: | |
1137 | case R_X86_64_PC64: | |
1138 | case R_X86_64_PLT32: | |
1139 | case R_X86_64_GOTPCREL: | |
1140 | case R_X86_64_GOTPCREL64: | |
6de2ae4a | 1141 | if (!_bfd_elf_create_ifunc_sections (abfd, info)) |
c2e61a4e | 1142 | return FALSE; |
cbe950e9 L |
1143 | break; |
1144 | } | |
1145 | ||
1146 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle | |
1147 | it here if it is defined in a non-shared object. */ | |
1148 | if (h->type == STT_GNU_IFUNC | |
1149 | && h->def_regular) | |
1150 | { | |
1151 | /* It is referenced by a non-shared object. */ | |
1152 | h->ref_regular = 1; | |
1153 | ||
1154 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
1155 | h->plt.refcount += 1; | |
1156 | ||
1157 | /* STT_GNU_IFUNC needs dynamic sections. */ | |
1158 | if (htab->elf.dynobj == NULL) | |
1159 | htab->elf.dynobj = abfd; | |
1160 | ||
1161 | switch (r_type) | |
1162 | { | |
048cbda4 | 1163 | default: |
4c544807 L |
1164 | if (h->root.root.string) |
1165 | name = h->root.root.string; | |
1166 | else | |
1167 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1168 | NULL); | |
048cbda4 L |
1169 | (*_bfd_error_handler) |
1170 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
1171 | "symbol `%s' isn't handled by %s"), abfd, | |
1172 | x86_64_elf_howto_table[r_type].name, | |
4c544807 | 1173 | name, __FUNCTION__); |
048cbda4 | 1174 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1175 | return FALSE; |
cbe950e9 | 1176 | |
710ab287 L |
1177 | case R_X86_64_64: |
1178 | h->non_got_ref = 1; | |
1179 | h->pointer_equality_needed = 1; | |
1180 | if (info->shared) | |
1181 | { | |
710ab287 L |
1182 | /* We must copy these reloc types into the output |
1183 | file. Create a reloc section in dynobj and | |
1184 | make room for this reloc. */ | |
e03a8ed8 L |
1185 | sreloc = _bfd_elf_create_ifunc_dyn_reloc |
1186 | (abfd, info, sec, sreloc, | |
1187 | &((struct elf64_x86_64_link_hash_entry *) h)->dyn_relocs); | |
710ab287 | 1188 | if (sreloc == NULL) |
c2e61a4e | 1189 | return FALSE; |
710ab287 L |
1190 | } |
1191 | break; | |
1192 | ||
cbe950e9 L |
1193 | case R_X86_64_32S: |
1194 | case R_X86_64_32: | |
cbe950e9 L |
1195 | case R_X86_64_PC32: |
1196 | case R_X86_64_PC64: | |
1197 | h->non_got_ref = 1; | |
1198 | if (r_type != R_X86_64_PC32 | |
1199 | && r_type != R_X86_64_PC64) | |
1200 | h->pointer_equality_needed = 1; | |
1201 | break; | |
1202 | ||
1203 | case R_X86_64_PLT32: | |
1204 | break; | |
1205 | ||
1206 | case R_X86_64_GOTPCREL: | |
1207 | case R_X86_64_GOTPCREL64: | |
7afd84dc | 1208 | h->got.refcount += 1; |
6de2ae4a L |
1209 | if (htab->elf.sgot == NULL |
1210 | && !_bfd_elf_create_got_section (htab->elf.dynobj, | |
1211 | info)) | |
c2e61a4e | 1212 | return FALSE; |
cbe950e9 L |
1213 | break; |
1214 | } | |
1215 | ||
1216 | continue; | |
1217 | } | |
71cb9464 | 1218 | } |
70256ad8 | 1219 | |
142411ca L |
1220 | if (! elf64_x86_64_tls_transition (info, abfd, sec, NULL, |
1221 | symtab_hdr, sym_hashes, | |
1222 | &r_type, GOT_UNKNOWN, | |
4c544807 | 1223 | rel, rel_end, h, r_symndx)) |
c2e61a4e | 1224 | return FALSE; |
142411ca | 1225 | |
bffbf940 | 1226 | switch (r_type) |
70256ad8 | 1227 | { |
bffbf940 JJ |
1228 | case R_X86_64_TLSLD: |
1229 | htab->tls_ld_got.refcount += 1; | |
1230 | goto create_got; | |
1231 | ||
1232 | case R_X86_64_TPOFF32: | |
1233 | if (info->shared) | |
70256ad8 | 1234 | { |
09a24cbf | 1235 | if (h) |
4c544807 L |
1236 | name = h->root.root.string; |
1237 | else | |
1238 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1239 | NULL); | |
bffbf940 | 1240 | (*_bfd_error_handler) |
d003868e AM |
1241 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
1242 | abfd, | |
4c544807 | 1243 | x86_64_elf_howto_table[r_type].name, name); |
bffbf940 | 1244 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1245 | return FALSE; |
70256ad8 | 1246 | } |
bffbf940 | 1247 | break; |
c434dee6 | 1248 | |
bffbf940 JJ |
1249 | case R_X86_64_GOTTPOFF: |
1250 | if (info->shared) | |
1251 | info->flags |= DF_STATIC_TLS; | |
1252 | /* Fall through */ | |
70256ad8 | 1253 | |
bffbf940 JJ |
1254 | case R_X86_64_GOT32: |
1255 | case R_X86_64_GOTPCREL: | |
1256 | case R_X86_64_TLSGD: | |
7b81dfbb AJ |
1257 | case R_X86_64_GOT64: |
1258 | case R_X86_64_GOTPCREL64: | |
1259 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
1260 | case R_X86_64_GOTPC32_TLSDESC: |
1261 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
1262 | /* This symbol requires a global offset table entry. */ |
1263 | { | |
1264 | int tls_type, old_tls_type; | |
1265 | ||
1266 | switch (r_type) | |
1267 | { | |
1268 | default: tls_type = GOT_NORMAL; break; | |
1269 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
1270 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
1271 | case R_X86_64_GOTPC32_TLSDESC: |
1272 | case R_X86_64_TLSDESC_CALL: | |
1273 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
1274 | } |
1275 | ||
1276 | if (h != NULL) | |
1277 | { | |
7b81dfbb AJ |
1278 | if (r_type == R_X86_64_GOTPLT64) |
1279 | { | |
1280 | /* This relocation indicates that we also need | |
1281 | a PLT entry, as this is a function. We don't need | |
1282 | a PLT entry for local symbols. */ | |
1283 | h->needs_plt = 1; | |
1284 | h->plt.refcount += 1; | |
1285 | } | |
bffbf940 JJ |
1286 | h->got.refcount += 1; |
1287 | old_tls_type = elf64_x86_64_hash_entry (h)->tls_type; | |
1288 | } | |
1289 | else | |
1290 | { | |
1291 | bfd_signed_vma *local_got_refcounts; | |
1292 | ||
1293 | /* This is a global offset table entry for a local symbol. */ | |
1294 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1295 | if (local_got_refcounts == NULL) | |
1296 | { | |
1297 | bfd_size_type size; | |
1298 | ||
1299 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1300 | size *= sizeof (bfd_signed_vma) |
1301 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
1302 | local_got_refcounts = ((bfd_signed_vma *) |
1303 | bfd_zalloc (abfd, size)); | |
1304 | if (local_got_refcounts == NULL) | |
c2e61a4e | 1305 | return FALSE; |
bffbf940 | 1306 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
67a4f2b7 AO |
1307 | elf64_x86_64_local_tlsdesc_gotent (abfd) |
1308 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); | |
bffbf940 | 1309 | elf64_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 1310 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
1311 | } |
1312 | local_got_refcounts[r_symndx] += 1; | |
1313 | old_tls_type | |
1314 | = elf64_x86_64_local_got_tls_type (abfd) [r_symndx]; | |
1315 | } | |
1316 | ||
1317 | /* If a TLS symbol is accessed using IE at least once, | |
1318 | there is no point to use dynamic model for it. */ | |
1319 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
1320 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
1321 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 1322 | { |
67a4f2b7 | 1323 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 1324 | tls_type = old_tls_type; |
67a4f2b7 AO |
1325 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1326 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1327 | tls_type |= old_tls_type; | |
bffbf940 JJ |
1328 | else |
1329 | { | |
09a24cbf | 1330 | if (h) |
4c544807 L |
1331 | name = h->root.root.string; |
1332 | else | |
1333 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
1334 | isym, NULL); | |
bffbf940 | 1335 | (*_bfd_error_handler) |
1f7a4e42 | 1336 | (_("%B: '%s' accessed both as normal and thread local symbol"), |
4c544807 | 1337 | abfd, name); |
c2e61a4e | 1338 | return FALSE; |
bffbf940 JJ |
1339 | } |
1340 | } | |
1341 | ||
1342 | if (old_tls_type != tls_type) | |
1343 | { | |
1344 | if (h != NULL) | |
1345 | elf64_x86_64_hash_entry (h)->tls_type = tls_type; | |
1346 | else | |
1347 | elf64_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1348 | } | |
1349 | } | |
c434dee6 AJ |
1350 | /* Fall through */ |
1351 | ||
d6ab8113 JB |
1352 | case R_X86_64_GOTOFF64: |
1353 | case R_X86_64_GOTPC32: | |
7b81dfbb | 1354 | case R_X86_64_GOTPC64: |
bffbf940 | 1355 | create_got: |
6de2ae4a | 1356 | if (htab->elf.sgot == NULL) |
c434dee6 AJ |
1357 | { |
1358 | if (htab->elf.dynobj == NULL) | |
1359 | htab->elf.dynobj = abfd; | |
6de2ae4a L |
1360 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, |
1361 | info)) | |
c2e61a4e | 1362 | return FALSE; |
c434dee6 | 1363 | } |
70256ad8 AJ |
1364 | break; |
1365 | ||
1366 | case R_X86_64_PLT32: | |
1367 | /* This symbol requires a procedure linkage table entry. We | |
407443a3 AJ |
1368 | actually build the entry in adjust_dynamic_symbol, |
1369 | because this might be a case of linking PIC code which is | |
1370 | never referenced by a dynamic object, in which case we | |
1371 | don't need to generate a procedure linkage table entry | |
1372 | after all. */ | |
70256ad8 AJ |
1373 | |
1374 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 1375 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
1376 | if (h == NULL) |
1377 | continue; | |
1378 | ||
f5385ebf | 1379 | h->needs_plt = 1; |
51b64d56 | 1380 | h->plt.refcount += 1; |
70256ad8 AJ |
1381 | break; |
1382 | ||
7b81dfbb AJ |
1383 | case R_X86_64_PLTOFF64: |
1384 | /* This tries to form the 'address' of a function relative | |
1385 | to GOT. For global symbols we need a PLT entry. */ | |
1386 | if (h != NULL) | |
1387 | { | |
1388 | h->needs_plt = 1; | |
1389 | h->plt.refcount += 1; | |
1390 | } | |
1391 | goto create_got; | |
1392 | ||
cc78d0af AJ |
1393 | case R_X86_64_8: |
1394 | case R_X86_64_16: | |
70256ad8 AJ |
1395 | case R_X86_64_32: |
1396 | case R_X86_64_32S: | |
1b71fb54 AJ |
1397 | /* Let's help debug shared library creation. These relocs |
1398 | cannot be used in shared libs. Don't error out for | |
1399 | sections we don't care about, such as debug sections or | |
1400 | non-constant sections. */ | |
1401 | if (info->shared | |
1402 | && (sec->flags & SEC_ALLOC) != 0 | |
1403 | && (sec->flags & SEC_READONLY) != 0) | |
1404 | { | |
09a24cbf | 1405 | if (h) |
4c544807 L |
1406 | name = h->root.root.string; |
1407 | else | |
1408 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1b71fb54 | 1409 | (*_bfd_error_handler) |
d003868e | 1410 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
4c544807 | 1411 | abfd, x86_64_elf_howto_table[r_type].name, name); |
1b71fb54 | 1412 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1413 | return FALSE; |
1b71fb54 AJ |
1414 | } |
1415 | /* Fall through. */ | |
1416 | ||
c434dee6 AJ |
1417 | case R_X86_64_PC8: |
1418 | case R_X86_64_PC16: | |
70256ad8 | 1419 | case R_X86_64_PC32: |
d6ab8113 | 1420 | case R_X86_64_PC64: |
1b71fb54 | 1421 | case R_X86_64_64: |
710ab287 | 1422 | if (h != NULL && info->executable) |
c434dee6 AJ |
1423 | { |
1424 | /* If this reloc is in a read-only section, we might | |
1425 | need a copy reloc. We can't check reliably at this | |
1426 | stage whether the section is read-only, as input | |
1427 | sections have not yet been mapped to output sections. | |
1428 | Tentatively set the flag for now, and correct in | |
1429 | adjust_dynamic_symbol. */ | |
f5385ebf | 1430 | h->non_got_ref = 1; |
c434dee6 AJ |
1431 | |
1432 | /* We may need a .plt entry if the function this reloc | |
1433 | refers to is in a shared lib. */ | |
1434 | h->plt.refcount += 1; | |
d6ab8113 | 1435 | if (r_type != R_X86_64_PC32 && r_type != R_X86_64_PC64) |
f5385ebf | 1436 | h->pointer_equality_needed = 1; |
c434dee6 | 1437 | } |
70256ad8 AJ |
1438 | |
1439 | /* If we are creating a shared library, and this is a reloc | |
1440 | against a global symbol, or a non PC relative reloc | |
1441 | against a local symbol, then we need to copy the reloc | |
1442 | into the shared library. However, if we are linking with | |
1443 | -Bsymbolic, we do not need to copy a reloc against a | |
1444 | global symbol which is defined in an object we are | |
407443a3 | 1445 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
1446 | this point we have not seen all the input files, so it is |
1447 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
1448 | later (it is never cleared). In case of a weak definition, |
1449 | DEF_REGULAR may be cleared later by a strong definition in | |
1450 | a shared library. We account for that possibility below by | |
1451 | storing information in the relocs_copied field of the hash | |
1452 | table entry. A similar situation occurs when creating | |
1453 | shared libraries and symbol visibility changes render the | |
1454 | symbol local. | |
1455 | ||
1456 | If on the other hand, we are creating an executable, we | |
1457 | may need to keep relocations for symbols satisfied by a | |
1458 | dynamic library if we manage to avoid copy relocs for the | |
0f88be7a | 1459 | symbol. */ |
c434dee6 AJ |
1460 | if ((info->shared |
1461 | && (sec->flags & SEC_ALLOC) != 0 | |
d8045f23 | 1462 | && (! IS_X86_64_PCREL_TYPE (r_type) |
c434dee6 | 1463 | || (h != NULL |
55255dae | 1464 | && (! SYMBOLIC_BIND (info, h) |
c434dee6 | 1465 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1466 | || !h->def_regular)))) |
d40d037c AJ |
1467 | || (ELIMINATE_COPY_RELOCS |
1468 | && !info->shared | |
c434dee6 AJ |
1469 | && (sec->flags & SEC_ALLOC) != 0 |
1470 | && h != NULL | |
1471 | && (h->root.type == bfd_link_hash_defweak | |
0f88be7a | 1472 | || !h->def_regular))) |
70256ad8 | 1473 | { |
e03a8ed8 L |
1474 | struct elf_dyn_relocs *p; |
1475 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
1476 | |
1477 | /* We must copy these reloc types into the output file. | |
1478 | Create a reloc section in dynobj and make room for | |
1479 | this reloc. */ | |
70256ad8 AJ |
1480 | if (sreloc == NULL) |
1481 | { | |
c434dee6 AJ |
1482 | if (htab->elf.dynobj == NULL) |
1483 | htab->elf.dynobj = abfd; | |
1484 | ||
83bac4b0 NC |
1485 | sreloc = _bfd_elf_make_dynamic_reloc_section |
1486 | (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE); | |
70256ad8 | 1487 | |
70256ad8 | 1488 | if (sreloc == NULL) |
c2e61a4e | 1489 | return FALSE; |
70256ad8 AJ |
1490 | } |
1491 | ||
c434dee6 AJ |
1492 | /* If this is a global symbol, we count the number of |
1493 | relocations we need for this symbol. */ | |
1494 | if (h != NULL) | |
70256ad8 | 1495 | { |
c434dee6 AJ |
1496 | head = &((struct elf64_x86_64_link_hash_entry *) h)->dyn_relocs; |
1497 | } | |
1498 | else | |
1499 | { | |
1500 | /* Track dynamic relocs needed for local syms too. | |
1501 | We really need local syms available to do this | |
1502 | easily. Oh well. */ | |
c434dee6 | 1503 | asection *s; |
87d72d41 AM |
1504 | void **vpp; |
1505 | Elf_Internal_Sym *isym; | |
1506 | ||
1507 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1508 | abfd, r_symndx); | |
1509 | if (isym == NULL) | |
1510 | return FALSE; | |
1511 | ||
1512 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 1513 | if (s == NULL) |
87d72d41 | 1514 | s = sec; |
70256ad8 | 1515 | |
e81d3500 DD |
1516 | /* Beware of type punned pointers vs strict aliasing |
1517 | rules. */ | |
1518 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 1519 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 1520 | } |
70256ad8 | 1521 | |
c434dee6 AJ |
1522 | p = *head; |
1523 | if (p == NULL || p->sec != sec) | |
1524 | { | |
1525 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 1526 | |
e03a8ed8 | 1527 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 1528 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 1529 | if (p == NULL) |
c2e61a4e | 1530 | return FALSE; |
c434dee6 AJ |
1531 | p->next = *head; |
1532 | *head = p; | |
1533 | p->sec = sec; | |
1534 | p->count = 0; | |
1535 | p->pc_count = 0; | |
70256ad8 | 1536 | } |
c434dee6 AJ |
1537 | |
1538 | p->count += 1; | |
d8045f23 | 1539 | if (IS_X86_64_PCREL_TYPE (r_type)) |
c434dee6 | 1540 | p->pc_count += 1; |
70256ad8 AJ |
1541 | } |
1542 | break; | |
fe4770f4 AJ |
1543 | |
1544 | /* This relocation describes the C++ object vtable hierarchy. | |
1545 | Reconstruct it for later use during GC. */ | |
1546 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 1547 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c2e61a4e | 1548 | return FALSE; |
fe4770f4 AJ |
1549 | break; |
1550 | ||
1551 | /* This relocation describes which C++ vtable entries are actually | |
1552 | used. Record for later use during GC. */ | |
1553 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
1554 | BFD_ASSERT (h != NULL); |
1555 | if (h != NULL | |
1556 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
c2e61a4e | 1557 | return FALSE; |
fe4770f4 | 1558 | break; |
c434dee6 AJ |
1559 | |
1560 | default: | |
1561 | break; | |
70256ad8 AJ |
1562 | } |
1563 | } | |
1564 | ||
b34976b6 | 1565 | return TRUE; |
70256ad8 AJ |
1566 | } |
1567 | ||
1568 | /* Return the section that should be marked against GC for a given | |
407443a3 | 1569 | relocation. */ |
70256ad8 AJ |
1570 | |
1571 | static asection * | |
27482721 | 1572 | elf64_x86_64_gc_mark_hook (asection *sec, |
07adf181 | 1573 | struct bfd_link_info *info, |
27482721 AJ |
1574 | Elf_Internal_Rela *rel, |
1575 | struct elf_link_hash_entry *h, | |
1576 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
1577 | { |
1578 | if (h != NULL) | |
07adf181 AM |
1579 | switch (ELF64_R_TYPE (rel->r_info)) |
1580 | { | |
1581 | case R_X86_64_GNU_VTINHERIT: | |
1582 | case R_X86_64_GNU_VTENTRY: | |
1583 | return NULL; | |
1584 | } | |
1585 | ||
1586 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
1587 | } |
1588 | ||
407443a3 | 1589 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 | 1590 | |
b34976b6 | 1591 | static bfd_boolean |
27482721 | 1592 | elf64_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, |
142411ca L |
1593 | asection *sec, |
1594 | const Elf_Internal_Rela *relocs) | |
70256ad8 AJ |
1595 | { |
1596 | Elf_Internal_Shdr *symtab_hdr; | |
1597 | struct elf_link_hash_entry **sym_hashes; | |
1598 | bfd_signed_vma *local_got_refcounts; | |
1599 | const Elf_Internal_Rela *rel, *relend; | |
c434dee6 | 1600 | |
7dda2462 TG |
1601 | if (info->relocatable) |
1602 | return TRUE; | |
1603 | ||
c434dee6 | 1604 | elf_section_data (sec)->local_dynrel = NULL; |
70256ad8 | 1605 | |
0ffa91dd | 1606 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 AJ |
1607 | sym_hashes = elf_sym_hashes (abfd); |
1608 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1609 | ||
70256ad8 AJ |
1610 | relend = relocs + sec->reloc_count; |
1611 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
1612 | { |
1613 | unsigned long r_symndx; | |
1614 | unsigned int r_type; | |
1615 | struct elf_link_hash_entry *h = NULL; | |
70256ad8 | 1616 | |
26e41594 AM |
1617 | r_symndx = ELF64_R_SYM (rel->r_info); |
1618 | if (r_symndx >= symtab_hdr->sh_info) | |
1619 | { | |
1620 | struct elf64_x86_64_link_hash_entry *eh; | |
e03a8ed8 L |
1621 | struct elf_dyn_relocs **pp; |
1622 | struct elf_dyn_relocs *p; | |
c434dee6 | 1623 | |
26e41594 | 1624 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1625 | while (h->root.type == bfd_link_hash_indirect |
1626 | || h->root.type == bfd_link_hash_warning) | |
1627 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1628 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
c434dee6 | 1629 | |
26e41594 AM |
1630 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1631 | if (p->sec == sec) | |
1632 | { | |
1633 | /* Everything must go for SEC. */ | |
1634 | *pp = p->next; | |
1635 | break; | |
1636 | } | |
1637 | } | |
c434dee6 | 1638 | |
26e41594 | 1639 | r_type = ELF64_R_TYPE (rel->r_info); |
142411ca L |
1640 | if (! elf64_x86_64_tls_transition (info, abfd, sec, NULL, |
1641 | symtab_hdr, sym_hashes, | |
1642 | &r_type, GOT_UNKNOWN, | |
4c544807 | 1643 | rel, relend, h, r_symndx)) |
142411ca L |
1644 | return FALSE; |
1645 | ||
26e41594 AM |
1646 | switch (r_type) |
1647 | { | |
1648 | case R_X86_64_TLSLD: | |
1649 | if (elf64_x86_64_hash_table (info)->tls_ld_got.refcount > 0) | |
1650 | elf64_x86_64_hash_table (info)->tls_ld_got.refcount -= 1; | |
1651 | break; | |
c434dee6 | 1652 | |
26e41594 | 1653 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
1654 | case R_X86_64_GOTPC32_TLSDESC: |
1655 | case R_X86_64_TLSDESC_CALL: | |
26e41594 AM |
1656 | case R_X86_64_GOTTPOFF: |
1657 | case R_X86_64_GOT32: | |
1658 | case R_X86_64_GOTPCREL: | |
7b81dfbb AJ |
1659 | case R_X86_64_GOT64: |
1660 | case R_X86_64_GOTPCREL64: | |
1661 | case R_X86_64_GOTPLT64: | |
26e41594 AM |
1662 | if (h != NULL) |
1663 | { | |
7b81dfbb AJ |
1664 | if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0) |
1665 | h->plt.refcount -= 1; | |
26e41594 AM |
1666 | if (h->got.refcount > 0) |
1667 | h->got.refcount -= 1; | |
1668 | } | |
1669 | else if (local_got_refcounts != NULL) | |
1670 | { | |
1671 | if (local_got_refcounts[r_symndx] > 0) | |
1672 | local_got_refcounts[r_symndx] -= 1; | |
1673 | } | |
1674 | break; | |
c434dee6 | 1675 | |
26e41594 AM |
1676 | case R_X86_64_8: |
1677 | case R_X86_64_16: | |
1678 | case R_X86_64_32: | |
1679 | case R_X86_64_64: | |
1680 | case R_X86_64_32S: | |
1681 | case R_X86_64_PC8: | |
1682 | case R_X86_64_PC16: | |
1683 | case R_X86_64_PC32: | |
d6ab8113 | 1684 | case R_X86_64_PC64: |
26e41594 AM |
1685 | if (info->shared) |
1686 | break; | |
1687 | /* Fall thru */ | |
c434dee6 | 1688 | |
26e41594 | 1689 | case R_X86_64_PLT32: |
7b81dfbb | 1690 | case R_X86_64_PLTOFF64: |
26e41594 AM |
1691 | if (h != NULL) |
1692 | { | |
1693 | if (h->plt.refcount > 0) | |
1694 | h->plt.refcount -= 1; | |
1695 | } | |
1696 | break; | |
70256ad8 | 1697 | |
26e41594 AM |
1698 | default: |
1699 | break; | |
1700 | } | |
1701 | } | |
70256ad8 | 1702 | |
b34976b6 | 1703 | return TRUE; |
70256ad8 AJ |
1704 | } |
1705 | ||
1706 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1707 | regular object. The current definition is in some section of the | |
1708 | dynamic object, but we're not including those sections. We have to | |
1709 | change the definition to something the rest of the link can | |
407443a3 | 1710 | understand. */ |
70256ad8 | 1711 | |
b34976b6 | 1712 | static bfd_boolean |
27482721 AJ |
1713 | elf64_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
1714 | struct elf_link_hash_entry *h) | |
70256ad8 | 1715 | { |
c434dee6 | 1716 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 | 1717 | asection *s; |
70256ad8 | 1718 | |
cbe950e9 L |
1719 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
1720 | if (h->type == STT_GNU_IFUNC) | |
1721 | { | |
1722 | if (h->plt.refcount <= 0) | |
1723 | { | |
1724 | h->plt.offset = (bfd_vma) -1; | |
1725 | h->needs_plt = 0; | |
1726 | } | |
1727 | return TRUE; | |
1728 | } | |
1729 | ||
70256ad8 AJ |
1730 | /* If this is a function, put it in the procedure linkage table. We |
1731 | will fill in the contents of the procedure linkage table later, | |
1732 | when we know the address of the .got section. */ | |
1733 | if (h->type == STT_FUNC | |
f5385ebf | 1734 | || h->needs_plt) |
70256ad8 | 1735 | { |
c434dee6 | 1736 | if (h->plt.refcount <= 0 |
27482721 AJ |
1737 | || SYMBOL_CALLS_LOCAL (info, h) |
1738 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1739 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 1740 | { |
70256ad8 AJ |
1741 | /* This case can occur if we saw a PLT32 reloc in an input |
1742 | file, but the symbol was never referred to by a dynamic | |
1743 | object, or if all references were garbage collected. In | |
1744 | such a case, we don't actually need to build a procedure | |
1745 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 1746 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 1747 | h->needs_plt = 0; |
70256ad8 AJ |
1748 | } |
1749 | ||
b34976b6 | 1750 | return TRUE; |
70256ad8 | 1751 | } |
bbd7ec4a | 1752 | else |
c434dee6 AJ |
1753 | /* It's possible that we incorrectly decided a .plt reloc was |
1754 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
1755 | check_relocs. We can't decide accurately between function and | |
1756 | non-function syms in check-relocs; Objects loaded later in | |
1757 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1758 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
1759 | |
1760 | /* If this is a weak symbol, and there is a real definition, the | |
1761 | processor independent code will have arranged for us to see the | |
407443a3 | 1762 | real definition first, and we can just use the same value. */ |
f6e332e6 | 1763 | if (h->u.weakdef != NULL) |
70256ad8 | 1764 | { |
f6e332e6 AM |
1765 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1766 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1767 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1768 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 1769 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 1770 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 1771 | return TRUE; |
70256ad8 AJ |
1772 | } |
1773 | ||
1774 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 1775 | is not a function. */ |
70256ad8 AJ |
1776 | |
1777 | /* If we are creating a shared library, we must presume that the | |
1778 | only references to the symbol are via the global offset table. | |
1779 | For such cases we need not do anything here; the relocations will | |
407443a3 | 1780 | be handled correctly by relocate_section. */ |
70256ad8 | 1781 | if (info->shared) |
b34976b6 | 1782 | return TRUE; |
70256ad8 AJ |
1783 | |
1784 | /* If there are no references to this symbol that do not use the | |
1785 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 1786 | if (!h->non_got_ref) |
b34976b6 | 1787 | return TRUE; |
70256ad8 | 1788 | |
c434dee6 AJ |
1789 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1790 | if (info->nocopyreloc) | |
1791 | { | |
f5385ebf | 1792 | h->non_got_ref = 0; |
b34976b6 | 1793 | return TRUE; |
c434dee6 AJ |
1794 | } |
1795 | ||
d40d037c | 1796 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 1797 | { |
d40d037c | 1798 | struct elf64_x86_64_link_hash_entry * eh; |
e03a8ed8 | 1799 | struct elf_dyn_relocs *p; |
c434dee6 | 1800 | |
d40d037c AJ |
1801 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
1802 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1803 | { | |
1804 | s = p->sec->output_section; | |
1805 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1806 | break; | |
1807 | } | |
1808 | ||
1809 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1810 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1811 | if (p == NULL) | |
1812 | { | |
f5385ebf | 1813 | h->non_got_ref = 0; |
d40d037c AJ |
1814 | return TRUE; |
1815 | } | |
c434dee6 AJ |
1816 | } |
1817 | ||
909272ee AM |
1818 | if (h->size == 0) |
1819 | { | |
1820 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), | |
1821 | h->root.root.string); | |
1822 | return TRUE; | |
1823 | } | |
1824 | ||
70256ad8 | 1825 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 1826 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
1827 | an entry for this symbol in the .dynsym section. The dynamic |
1828 | object will contain position independent code, so all references | |
1829 | from the dynamic object to this symbol will go through the global | |
1830 | offset table. The dynamic linker will use the .dynsym entry to | |
1831 | determine the address it must put in the global offset table, so | |
1832 | both the dynamic object and the regular object will refer to the | |
1833 | same memory location for the variable. */ | |
1834 | ||
c434dee6 | 1835 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
1836 | |
1837 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
1838 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 1839 | runtime process image. */ |
70256ad8 AJ |
1840 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1841 | { | |
eea6121a | 1842 | htab->srelbss->size += sizeof (Elf64_External_Rela); |
f5385ebf | 1843 | h->needs_copy = 1; |
70256ad8 AJ |
1844 | } |
1845 | ||
c434dee6 | 1846 | s = htab->sdynbss; |
70256ad8 | 1847 | |
027297b7 | 1848 | return _bfd_elf_adjust_dynamic_copy (h, s); |
70256ad8 AJ |
1849 | } |
1850 | ||
c434dee6 AJ |
1851 | /* Allocate space in .plt, .got and associated reloc sections for |
1852 | dynamic relocs. */ | |
1853 | ||
b34976b6 | 1854 | static bfd_boolean |
eb4ff4d6 | 1855 | elf64_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
1856 | { |
1857 | struct bfd_link_info *info; | |
1858 | struct elf64_x86_64_link_hash_table *htab; | |
1859 | struct elf64_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 1860 | struct elf_dyn_relocs *p; |
c434dee6 | 1861 | |
e92d460e | 1862 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1863 | return TRUE; |
c434dee6 | 1864 | |
e92d460e AM |
1865 | if (h->root.type == bfd_link_hash_warning) |
1866 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
cbe950e9 | 1867 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
e92d460e | 1868 | |
c434dee6 AJ |
1869 | info = (struct bfd_link_info *) inf; |
1870 | htab = elf64_x86_64_hash_table (info); | |
1871 | ||
cbe950e9 L |
1872 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
1873 | here if it is defined and referenced in a non-shared object. */ | |
1874 | if (h->type == STT_GNU_IFUNC | |
1875 | && h->def_regular) | |
e03a8ed8 L |
1876 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, |
1877 | &eh->dyn_relocs, | |
1878 | PLT_ENTRY_SIZE, | |
1879 | GOT_ENTRY_SIZE); | |
cbe950e9 L |
1880 | else if (htab->elf.dynamic_sections_created |
1881 | && h->plt.refcount > 0) | |
c434dee6 AJ |
1882 | { |
1883 | /* Make sure this symbol is output as a dynamic symbol. | |
1884 | Undefined weak syms won't yet be marked as dynamic. */ | |
1885 | if (h->dynindx == -1 | |
f5385ebf | 1886 | && !h->forced_local) |
c434dee6 | 1887 | { |
c152c796 | 1888 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1889 | return FALSE; |
c434dee6 AJ |
1890 | } |
1891 | ||
27482721 AJ |
1892 | if (info->shared |
1893 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
c434dee6 | 1894 | { |
6de2ae4a | 1895 | asection *s = htab->elf.splt; |
c434dee6 AJ |
1896 | |
1897 | /* If this is the first .plt entry, make room for the special | |
1898 | first entry. */ | |
eea6121a AM |
1899 | if (s->size == 0) |
1900 | s->size += PLT_ENTRY_SIZE; | |
c434dee6 | 1901 | |
eea6121a | 1902 | h->plt.offset = s->size; |
c434dee6 AJ |
1903 | |
1904 | /* If this symbol is not defined in a regular file, and we are | |
1905 | not generating a shared library, then set the symbol to this | |
1906 | location in the .plt. This is required to make function | |
1907 | pointers compare as equal between the normal executable and | |
1908 | the shared library. */ | |
1909 | if (! info->shared | |
f5385ebf | 1910 | && !h->def_regular) |
c434dee6 AJ |
1911 | { |
1912 | h->root.u.def.section = s; | |
1913 | h->root.u.def.value = h->plt.offset; | |
1914 | } | |
1915 | ||
1916 | /* Make room for this entry. */ | |
eea6121a | 1917 | s->size += PLT_ENTRY_SIZE; |
c434dee6 AJ |
1918 | |
1919 | /* We also need to make an entry in the .got.plt section, which | |
1920 | will be placed in the .got section by the linker script. */ | |
6de2ae4a | 1921 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; |
c434dee6 AJ |
1922 | |
1923 | /* We also need to make an entry in the .rela.plt section. */ | |
6de2ae4a L |
1924 | htab->elf.srelplt->size += sizeof (Elf64_External_Rela); |
1925 | htab->elf.srelplt->reloc_count++; | |
c434dee6 AJ |
1926 | } |
1927 | else | |
1928 | { | |
1929 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1930 | h->needs_plt = 0; |
c434dee6 AJ |
1931 | } |
1932 | } | |
1933 | else | |
1934 | { | |
1935 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1936 | h->needs_plt = 0; |
c434dee6 AJ |
1937 | } |
1938 | ||
67a4f2b7 AO |
1939 | eh->tlsdesc_got = (bfd_vma) -1; |
1940 | ||
bffbf940 JJ |
1941 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
1942 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
1943 | if (h->got.refcount > 0 | |
1944 | && !info->shared | |
1945 | && h->dynindx == -1 | |
1946 | && elf64_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) | |
d8045f23 NC |
1947 | { |
1948 | h->got.offset = (bfd_vma) -1; | |
1949 | } | |
bffbf940 | 1950 | else if (h->got.refcount > 0) |
c434dee6 AJ |
1951 | { |
1952 | asection *s; | |
b34976b6 | 1953 | bfd_boolean dyn; |
bffbf940 | 1954 | int tls_type = elf64_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
1955 | |
1956 | /* Make sure this symbol is output as a dynamic symbol. | |
1957 | Undefined weak syms won't yet be marked as dynamic. */ | |
1958 | if (h->dynindx == -1 | |
f5385ebf | 1959 | && !h->forced_local) |
c434dee6 | 1960 | { |
c152c796 | 1961 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1962 | return FALSE; |
c434dee6 AJ |
1963 | } |
1964 | ||
67a4f2b7 AO |
1965 | if (GOT_TLS_GDESC_P (tls_type)) |
1966 | { | |
6de2ae4a | 1967 | eh->tlsdesc_got = htab->elf.sgotplt->size |
67a4f2b7 | 1968 | - elf64_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 1969 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
1970 | h->got.offset = (bfd_vma) -2; |
1971 | } | |
1972 | if (! GOT_TLS_GDESC_P (tls_type) | |
1973 | || GOT_TLS_GD_P (tls_type)) | |
1974 | { | |
6de2ae4a | 1975 | s = htab->elf.sgot; |
67a4f2b7 AO |
1976 | h->got.offset = s->size; |
1977 | s->size += GOT_ENTRY_SIZE; | |
1978 | if (GOT_TLS_GD_P (tls_type)) | |
1979 | s->size += GOT_ENTRY_SIZE; | |
1980 | } | |
c434dee6 | 1981 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 JJ |
1982 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
1983 | and two if global. | |
1984 | R_X86_64_GOTTPOFF needs one dynamic relocation. */ | |
67a4f2b7 | 1985 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 1986 | || tls_type == GOT_TLS_IE) |
6de2ae4a | 1987 | htab->elf.srelgot->size += sizeof (Elf64_External_Rela); |
67a4f2b7 | 1988 | else if (GOT_TLS_GD_P (tls_type)) |
6de2ae4a | 1989 | htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela); |
67a4f2b7 AO |
1990 | else if (! GOT_TLS_GDESC_P (tls_type) |
1991 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1992 | || h->root.type != bfd_link_hash_undefweak) | |
27482721 AJ |
1993 | && (info->shared |
1994 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
6de2ae4a | 1995 | htab->elf.srelgot->size += sizeof (Elf64_External_Rela); |
67a4f2b7 AO |
1996 | if (GOT_TLS_GDESC_P (tls_type)) |
1997 | { | |
6de2ae4a | 1998 | htab->elf.srelplt->size += sizeof (Elf64_External_Rela); |
67a4f2b7 AO |
1999 | htab->tlsdesc_plt = (bfd_vma) -1; |
2000 | } | |
c434dee6 AJ |
2001 | } |
2002 | else | |
2003 | h->got.offset = (bfd_vma) -1; | |
2004 | ||
c434dee6 | 2005 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2006 | return TRUE; |
c434dee6 AJ |
2007 | |
2008 | /* In the shared -Bsymbolic case, discard space allocated for | |
2009 | dynamic pc-relative relocs against symbols which turn out to be | |
2010 | defined in regular objects. For the normal shared case, discard | |
2011 | space for pc-relative relocs that have become local due to symbol | |
2012 | visibility changes. */ | |
2013 | ||
2014 | if (info->shared) | |
2015 | { | |
27482721 AJ |
2016 | /* Relocs that use pc_count are those that appear on a call |
2017 | insn, or certain REL relocs that can generated via assembly. | |
2018 | We want calls to protected symbols to resolve directly to the | |
2019 | function rather than going via the plt. If people want | |
2020 | function pointer comparisons to work as expected then they | |
2021 | should avoid writing weird assembly. */ | |
2022 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 2023 | { |
e03a8ed8 | 2024 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
2025 | |
2026 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2027 | { | |
2028 | p->count -= p->pc_count; | |
2029 | p->pc_count = 0; | |
2030 | if (p->count == 0) | |
2031 | *pp = p->next; | |
2032 | else | |
2033 | pp = &p->next; | |
2034 | } | |
2035 | } | |
4e795f50 AM |
2036 | |
2037 | /* Also discard relocs on undefined weak syms with non-default | |
2038 | visibility. */ | |
22d606e9 | 2039 | if (eh->dyn_relocs != NULL |
4e795f50 | 2040 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
2041 | { |
2042 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2043 | eh->dyn_relocs = NULL; | |
2044 | ||
2045 | /* Make sure undefined weak symbols are output as a dynamic | |
2046 | symbol in PIEs. */ | |
2047 | else if (h->dynindx == -1 | |
d8045f23 NC |
2048 | && ! h->forced_local |
2049 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2050 | return FALSE; | |
22d606e9 | 2051 | } |
cbe950e9 | 2052 | |
d8045f23 | 2053 | } |
d40d037c | 2054 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
2055 | { |
2056 | /* For the non-shared case, discard space for relocs against | |
2057 | symbols which turn out to need copy relocs or are not | |
2058 | dynamic. */ | |
2059 | ||
f5385ebf AM |
2060 | if (!h->non_got_ref |
2061 | && ((h->def_dynamic | |
2062 | && !h->def_regular) | |
c434dee6 AJ |
2063 | || (htab->elf.dynamic_sections_created |
2064 | && (h->root.type == bfd_link_hash_undefweak | |
2065 | || h->root.type == bfd_link_hash_undefined)))) | |
2066 | { | |
2067 | /* Make sure this symbol is output as a dynamic symbol. | |
2068 | Undefined weak syms won't yet be marked as dynamic. */ | |
2069 | if (h->dynindx == -1 | |
d8045f23 NC |
2070 | && ! h->forced_local |
2071 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2072 | return FALSE; | |
c434dee6 AJ |
2073 | |
2074 | /* If that succeeded, we know we'll be keeping all the | |
2075 | relocs. */ | |
2076 | if (h->dynindx != -1) | |
2077 | goto keep; | |
2078 | } | |
2079 | ||
2080 | eh->dyn_relocs = NULL; | |
2081 | ||
2082 | keep: ; | |
2083 | } | |
2084 | ||
2085 | /* Finally, allocate space. */ | |
2086 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2087 | { | |
e7c33416 NC |
2088 | asection * sreloc; |
2089 | ||
cbe950e9 | 2090 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2091 | |
2092 | BFD_ASSERT (sreloc != NULL); | |
2093 | ||
eea6121a | 2094 | sreloc->size += p->count * sizeof (Elf64_External_Rela); |
c434dee6 AJ |
2095 | } |
2096 | ||
b34976b6 | 2097 | return TRUE; |
c434dee6 AJ |
2098 | } |
2099 | ||
c25bc9fc L |
2100 | /* Allocate space in .plt, .got and associated reloc sections for |
2101 | local dynamic relocs. */ | |
2102 | ||
2103 | static bfd_boolean | |
2104 | elf64_x86_64_allocate_local_dynrelocs (void **slot, void *inf) | |
2105 | { | |
2106 | struct elf_link_hash_entry *h | |
2107 | = (struct elf_link_hash_entry *) *slot; | |
2108 | ||
2109 | if (h->type != STT_GNU_IFUNC | |
2110 | || !h->def_regular | |
2111 | || !h->ref_regular | |
2112 | || !h->forced_local | |
2113 | || h->root.type != bfd_link_hash_defined) | |
2114 | abort (); | |
2115 | ||
2116 | return elf64_x86_64_allocate_dynrelocs (h, inf); | |
2117 | } | |
2118 | ||
c434dee6 AJ |
2119 | /* Find any dynamic relocs that apply to read-only sections. */ |
2120 | ||
b34976b6 | 2121 | static bfd_boolean |
eb4ff4d6 | 2122 | elf64_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
2123 | { |
2124 | struct elf64_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 2125 | struct elf_dyn_relocs *p; |
c434dee6 | 2126 | |
e92d460e AM |
2127 | if (h->root.type == bfd_link_hash_warning) |
2128 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2129 | ||
c434dee6 AJ |
2130 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
2131 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2132 | { | |
2133 | asection *s = p->sec->output_section; | |
2134 | ||
2135 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2136 | { | |
2137 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2138 | ||
2139 | info->flags |= DF_TEXTREL; | |
2140 | ||
2141 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 2142 | return FALSE; |
c434dee6 AJ |
2143 | } |
2144 | } | |
b34976b6 | 2145 | return TRUE; |
c434dee6 AJ |
2146 | } |
2147 | ||
70256ad8 AJ |
2148 | /* Set the sizes of the dynamic sections. */ |
2149 | ||
b34976b6 | 2150 | static bfd_boolean |
27482721 AJ |
2151 | elf64_x86_64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
2152 | struct bfd_link_info *info) | |
70256ad8 | 2153 | { |
c434dee6 | 2154 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2155 | bfd *dynobj; |
2156 | asection *s; | |
b34976b6 | 2157 | bfd_boolean relocs; |
c434dee6 | 2158 | bfd *ibfd; |
70256ad8 | 2159 | |
c434dee6 AJ |
2160 | htab = elf64_x86_64_hash_table (info); |
2161 | dynobj = htab->elf.dynobj; | |
2162 | if (dynobj == NULL) | |
2163 | abort (); | |
70256ad8 | 2164 | |
c434dee6 | 2165 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
2166 | { |
2167 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 2168 | if (info->executable) |
70256ad8 AJ |
2169 | { |
2170 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
c434dee6 AJ |
2171 | if (s == NULL) |
2172 | abort (); | |
eea6121a | 2173 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
70256ad8 AJ |
2174 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
2175 | } | |
2176 | } | |
70256ad8 | 2177 | |
c434dee6 AJ |
2178 | /* Set up .got offsets for local syms, and space for local dynamic |
2179 | relocs. */ | |
2180 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
70256ad8 | 2181 | { |
c434dee6 AJ |
2182 | bfd_signed_vma *local_got; |
2183 | bfd_signed_vma *end_local_got; | |
bffbf940 | 2184 | char *local_tls_type; |
67a4f2b7 | 2185 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
2186 | bfd_size_type locsymcount; |
2187 | Elf_Internal_Shdr *symtab_hdr; | |
2188 | asection *srel; | |
70256ad8 | 2189 | |
0ffa91dd | 2190 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
2191 | continue; |
2192 | ||
c434dee6 | 2193 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 2194 | { |
e03a8ed8 | 2195 | struct elf_dyn_relocs *p; |
c434dee6 | 2196 | |
e03a8ed8 | 2197 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 2198 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
2199 | p != NULL; |
2200 | p = p->next) | |
70256ad8 | 2201 | { |
c434dee6 AJ |
2202 | if (!bfd_is_abs_section (p->sec) |
2203 | && bfd_is_abs_section (p->sec->output_section)) | |
2204 | { | |
2205 | /* Input section has been discarded, either because | |
2206 | it is a copy of a linkonce section or due to | |
2207 | linker script /DISCARD/, so we'll be discarding | |
2208 | the relocs too. */ | |
2209 | } | |
2210 | else if (p->count != 0) | |
2211 | { | |
2212 | srel = elf_section_data (p->sec)->sreloc; | |
eea6121a | 2213 | srel->size += p->count * sizeof (Elf64_External_Rela); |
c434dee6 AJ |
2214 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
2215 | info->flags |= DF_TEXTREL; | |
c434dee6 | 2216 | } |
70256ad8 AJ |
2217 | } |
2218 | } | |
c434dee6 AJ |
2219 | |
2220 | local_got = elf_local_got_refcounts (ibfd); | |
2221 | if (!local_got) | |
2222 | continue; | |
2223 | ||
0ffa91dd | 2224 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
2225 | locsymcount = symtab_hdr->sh_info; |
2226 | end_local_got = local_got + locsymcount; | |
bffbf940 | 2227 | local_tls_type = elf64_x86_64_local_got_tls_type (ibfd); |
67a4f2b7 | 2228 | local_tlsdesc_gotent = elf64_x86_64_local_tlsdesc_gotent (ibfd); |
6de2ae4a L |
2229 | s = htab->elf.sgot; |
2230 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
2231 | for (; local_got < end_local_got; |
2232 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 2233 | { |
67a4f2b7 | 2234 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 2235 | if (*local_got > 0) |
70256ad8 | 2236 | { |
67a4f2b7 AO |
2237 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
2238 | { | |
6de2ae4a | 2239 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
67a4f2b7 | 2240 | - elf64_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2241 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2242 | *local_got = (bfd_vma) -2; |
2243 | } | |
2244 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2245 | || GOT_TLS_GD_P (*local_tls_type)) | |
2246 | { | |
2247 | *local_got = s->size; | |
2248 | s->size += GOT_ENTRY_SIZE; | |
2249 | if (GOT_TLS_GD_P (*local_tls_type)) | |
2250 | s->size += GOT_ENTRY_SIZE; | |
2251 | } | |
bffbf940 | 2252 | if (info->shared |
67a4f2b7 | 2253 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 2254 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
2255 | { |
2256 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
2257 | { | |
6de2ae4a L |
2258 | htab->elf.srelplt->size |
2259 | += sizeof (Elf64_External_Rela); | |
67a4f2b7 AO |
2260 | htab->tlsdesc_plt = (bfd_vma) -1; |
2261 | } | |
2262 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2263 | || GOT_TLS_GD_P (*local_tls_type)) | |
2264 | srel->size += sizeof (Elf64_External_Rela); | |
2265 | } | |
70256ad8 AJ |
2266 | } |
2267 | else | |
c434dee6 AJ |
2268 | *local_got = (bfd_vma) -1; |
2269 | } | |
2270 | } | |
70256ad8 | 2271 | |
bffbf940 JJ |
2272 | if (htab->tls_ld_got.refcount > 0) |
2273 | { | |
2274 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
2275 | relocs. */ | |
6de2ae4a L |
2276 | htab->tls_ld_got.offset = htab->elf.sgot->size; |
2277 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; | |
2278 | htab->elf.srelgot->size += sizeof (Elf64_External_Rela); | |
bffbf940 JJ |
2279 | } |
2280 | else | |
2281 | htab->tls_ld_got.offset = -1; | |
2282 | ||
c434dee6 AJ |
2283 | /* Allocate global sym .plt and .got entries, and space for global |
2284 | sym dynamic relocs. */ | |
eb4ff4d6 L |
2285 | elf_link_hash_traverse (&htab->elf, elf64_x86_64_allocate_dynrelocs, |
2286 | info); | |
c434dee6 | 2287 | |
c25bc9fc L |
2288 | /* Allocate .plt and .got entries, and space for local symbols. */ |
2289 | htab_traverse (htab->loc_hash_table, | |
2290 | elf64_x86_64_allocate_local_dynrelocs, | |
2291 | info); | |
2292 | ||
67a4f2b7 AO |
2293 | /* For every jump slot reserved in the sgotplt, reloc_count is |
2294 | incremented. However, when we reserve space for TLS descriptors, | |
2295 | it's not incremented, so in order to compute the space reserved | |
2296 | for them, it suffices to multiply the reloc count by the jump | |
2297 | slot size. */ | |
6de2ae4a | 2298 | if (htab->elf.srelplt) |
67a4f2b7 AO |
2299 | htab->sgotplt_jump_table_size |
2300 | = elf64_x86_64_compute_jump_table_size (htab); | |
2301 | ||
2302 | if (htab->tlsdesc_plt) | |
2303 | { | |
2304 | /* If we're not using lazy TLS relocations, don't generate the | |
2305 | PLT and GOT entries they require. */ | |
2306 | if ((info->flags & DF_BIND_NOW)) | |
2307 | htab->tlsdesc_plt = 0; | |
2308 | else | |
2309 | { | |
6de2ae4a L |
2310 | htab->tlsdesc_got = htab->elf.sgot->size; |
2311 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
2312 | /* Reserve room for the initial entry. |
2313 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a L |
2314 | if (htab->elf.splt->size == 0) |
2315 | htab->elf.splt->size += PLT_ENTRY_SIZE; | |
2316 | htab->tlsdesc_plt = htab->elf.splt->size; | |
2317 | htab->elf.splt->size += PLT_ENTRY_SIZE; | |
67a4f2b7 AO |
2318 | } |
2319 | } | |
2320 | ||
c434dee6 AJ |
2321 | /* We now have determined the sizes of the various dynamic sections. |
2322 | Allocate memory for them. */ | |
b34976b6 | 2323 | relocs = FALSE; |
c434dee6 AJ |
2324 | for (s = dynobj->sections; s != NULL; s = s->next) |
2325 | { | |
2326 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2327 | continue; | |
2328 | ||
6de2ae4a L |
2329 | if (s == htab->elf.splt |
2330 | || s == htab->elf.sgot | |
2331 | || s == htab->elf.sgotplt | |
2332 | || s == htab->elf.iplt | |
2333 | || s == htab->elf.igotplt | |
75ff4589 | 2334 | || s == htab->sdynbss) |
c434dee6 AJ |
2335 | { |
2336 | /* Strip this section if we don't need it; see the | |
2337 | comment below. */ | |
2338 | } | |
0112cd26 | 2339 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 2340 | { |
6de2ae4a | 2341 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 2342 | relocs = TRUE; |
c434dee6 AJ |
2343 | |
2344 | /* We use the reloc_count field as a counter if we need | |
2345 | to copy relocs into the output file. */ | |
6de2ae4a | 2346 | if (s != htab->elf.srelplt) |
67a4f2b7 | 2347 | s->reloc_count = 0; |
70256ad8 | 2348 | } |
c434dee6 | 2349 | else |
70256ad8 AJ |
2350 | { |
2351 | /* It's not one of our sections, so don't allocate space. */ | |
2352 | continue; | |
2353 | } | |
2354 | ||
eea6121a | 2355 | if (s->size == 0) |
70256ad8 | 2356 | { |
c434dee6 AJ |
2357 | /* If we don't need this section, strip it from the |
2358 | output file. This is mostly to handle .rela.bss and | |
2359 | .rela.plt. We must create both sections in | |
2360 | create_dynamic_sections, because they must be created | |
2361 | before the linker maps input sections to output | |
2362 | sections. The linker does that before | |
2363 | adjust_dynamic_symbol is called, and it is that | |
2364 | function which decides whether anything needs to go | |
2365 | into these sections. */ | |
2366 | ||
8423293d | 2367 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
2368 | continue; |
2369 | } | |
2370 | ||
c456f082 AM |
2371 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
2372 | continue; | |
2373 | ||
70256ad8 AJ |
2374 | /* Allocate memory for the section contents. We use bfd_zalloc |
2375 | here in case unused entries are not reclaimed before the | |
2376 | section's contents are written out. This should not happen, | |
2377 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
2378 | of garbage. */ | |
eea6121a | 2379 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 2380 | if (s->contents == NULL) |
b34976b6 | 2381 | return FALSE; |
70256ad8 AJ |
2382 | } |
2383 | ||
c434dee6 | 2384 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
2385 | { |
2386 | /* Add some entries to the .dynamic section. We fill in the | |
2387 | values later, in elf64_x86_64_finish_dynamic_sections, but we | |
2388 | must add the entries now so that we get the correct size for | |
407443a3 | 2389 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 2390 | dynamic linker and used by the debugger. */ |
dc810e39 | 2391 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 2392 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 2393 | |
36af4a4e | 2394 | if (info->executable) |
70256ad8 | 2395 | { |
dc810e39 | 2396 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2397 | return FALSE; |
70256ad8 AJ |
2398 | } |
2399 | ||
6de2ae4a | 2400 | if (htab->elf.splt->size != 0) |
70256ad8 | 2401 | { |
dc810e39 AM |
2402 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2403 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2404 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2405 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2406 | return FALSE; |
67a4f2b7 AO |
2407 | |
2408 | if (htab->tlsdesc_plt | |
2409 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
2410 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
2411 | return FALSE; | |
70256ad8 AJ |
2412 | } |
2413 | ||
2414 | if (relocs) | |
2415 | { | |
dc810e39 AM |
2416 | if (!add_dynamic_entry (DT_RELA, 0) |
2417 | || !add_dynamic_entry (DT_RELASZ, 0) | |
2418 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
b34976b6 | 2419 | return FALSE; |
70256ad8 | 2420 | |
c434dee6 AJ |
2421 | /* If any dynamic relocs apply to a read-only section, |
2422 | then we need a DT_TEXTREL entry. */ | |
2423 | if ((info->flags & DF_TEXTREL) == 0) | |
eb4ff4d6 L |
2424 | elf_link_hash_traverse (&htab->elf, |
2425 | elf64_x86_64_readonly_dynrelocs, | |
2426 | info); | |
c434dee6 AJ |
2427 | |
2428 | if ((info->flags & DF_TEXTREL) != 0) | |
2429 | { | |
2430 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 2431 | return FALSE; |
c434dee6 | 2432 | } |
70256ad8 AJ |
2433 | } |
2434 | } | |
dc810e39 | 2435 | #undef add_dynamic_entry |
70256ad8 | 2436 | |
b34976b6 | 2437 | return TRUE; |
70256ad8 AJ |
2438 | } |
2439 | ||
67a4f2b7 AO |
2440 | static bfd_boolean |
2441 | elf64_x86_64_always_size_sections (bfd *output_bfd, | |
2442 | struct bfd_link_info *info) | |
2443 | { | |
2444 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
2445 | ||
2446 | if (tls_sec) | |
2447 | { | |
2448 | struct elf_link_hash_entry *tlsbase; | |
2449 | ||
2450 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
2451 | "_TLS_MODULE_BASE_", | |
2452 | FALSE, FALSE, FALSE); | |
2453 | ||
2454 | if (tlsbase && tlsbase->type == STT_TLS) | |
2455 | { | |
2456 | struct bfd_link_hash_entry *bh = NULL; | |
2457 | const struct elf_backend_data *bed | |
2458 | = get_elf_backend_data (output_bfd); | |
2459 | ||
2460 | if (!(_bfd_generic_link_add_one_symbol | |
2461 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
2462 | tls_sec, 0, NULL, FALSE, | |
2463 | bed->collect, &bh))) | |
2464 | return FALSE; | |
9f03412a AO |
2465 | |
2466 | elf64_x86_64_hash_table (info)->tls_module_base = bh; | |
2467 | ||
67a4f2b7 AO |
2468 | tlsbase = (struct elf_link_hash_entry *)bh; |
2469 | tlsbase->def_regular = 1; | |
2470 | tlsbase->other = STV_HIDDEN; | |
2471 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
2472 | } | |
2473 | } | |
2474 | ||
2475 | return TRUE; | |
2476 | } | |
2477 | ||
9f03412a AO |
2478 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
2479 | executables. Rather than setting it to the beginning of the TLS | |
2480 | section, we have to set it to the end. This function may be called | |
2481 | multiple times, it is idempotent. */ | |
2482 | ||
2483 | static void | |
eb4ff4d6 | 2484 | elf64_x86_64_set_tls_module_base (struct bfd_link_info *info) |
9f03412a AO |
2485 | { |
2486 | struct bfd_link_hash_entry *base; | |
2487 | ||
2488 | if (!info->executable) | |
2489 | return; | |
2490 | ||
2491 | base = elf64_x86_64_hash_table (info)->tls_module_base; | |
2492 | ||
2493 | if (!base) | |
2494 | return; | |
2495 | ||
2496 | base->u.def.value = elf_hash_table (info)->tls_size; | |
2497 | } | |
2498 | ||
bffbf940 JJ |
2499 | /* Return the base VMA address which should be subtracted from real addresses |
2500 | when resolving @dtpoff relocation. | |
2501 | This is PT_TLS segment p_vaddr. */ | |
2502 | ||
2503 | static bfd_vma | |
eb4ff4d6 | 2504 | elf64_x86_64_dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 2505 | { |
e1918d23 AM |
2506 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2507 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 2508 | return 0; |
e1918d23 | 2509 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
2510 | } |
2511 | ||
2512 | /* Return the relocation value for @tpoff relocation | |
2513 | if STT_TLS virtual address is ADDRESS. */ | |
2514 | ||
2515 | static bfd_vma | |
eb4ff4d6 | 2516 | elf64_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 2517 | { |
e1918d23 | 2518 | struct elf_link_hash_table *htab = elf_hash_table (info); |
bffbf940 JJ |
2519 | |
2520 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 2521 | if (htab->tls_sec == NULL) |
bffbf940 | 2522 | return 0; |
e1918d23 | 2523 | return address - htab->tls_size - htab->tls_sec->vma; |
bffbf940 JJ |
2524 | } |
2525 | ||
90f487df L |
2526 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
2527 | branch? */ | |
2528 | ||
2529 | static bfd_boolean | |
2530 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
2531 | { | |
2532 | /* Opcode Instruction | |
2533 | 0xe8 call | |
2534 | 0xe9 jump | |
2535 | 0x0f 0x8x conditional jump */ | |
2536 | return ((offset > 0 | |
2537 | && (contents [offset - 1] == 0xe8 | |
2538 | || contents [offset - 1] == 0xe9)) | |
2539 | || (offset > 1 | |
2540 | && contents [offset - 2] == 0x0f | |
2541 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
2542 | } | |
2543 | ||
8d88c4ca NC |
2544 | /* Relocate an x86_64 ELF section. */ |
2545 | ||
b34976b6 | 2546 | static bfd_boolean |
27482721 AJ |
2547 | elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info, |
2548 | bfd *input_bfd, asection *input_section, | |
2549 | bfd_byte *contents, Elf_Internal_Rela *relocs, | |
2550 | Elf_Internal_Sym *local_syms, | |
2551 | asection **local_sections) | |
8d88c4ca | 2552 | { |
c434dee6 | 2553 | struct elf64_x86_64_link_hash_table *htab; |
8d88c4ca NC |
2554 | Elf_Internal_Shdr *symtab_hdr; |
2555 | struct elf_link_hash_entry **sym_hashes; | |
2556 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2557 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 2558 | Elf_Internal_Rela *rel; |
8d88c4ca NC |
2559 | Elf_Internal_Rela *relend; |
2560 | ||
0ffa91dd NC |
2561 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
2562 | ||
c434dee6 | 2563 | htab = elf64_x86_64_hash_table (info); |
0ffa91dd | 2564 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
2565 | sym_hashes = elf_sym_hashes (input_bfd); |
2566 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
67a4f2b7 | 2567 | local_tlsdesc_gotents = elf64_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 2568 | |
eb4ff4d6 | 2569 | elf64_x86_64_set_tls_module_base (info); |
9f03412a | 2570 | |
c434dee6 | 2571 | rel = relocs; |
8d88c4ca | 2572 | relend = relocs + input_section->reloc_count; |
c434dee6 | 2573 | for (; rel < relend; rel++) |
8d88c4ca | 2574 | { |
bffbf940 | 2575 | unsigned int r_type; |
8d88c4ca NC |
2576 | reloc_howto_type *howto; |
2577 | unsigned long r_symndx; | |
2578 | struct elf_link_hash_entry *h; | |
2579 | Elf_Internal_Sym *sym; | |
2580 | asection *sec; | |
67a4f2b7 | 2581 | bfd_vma off, offplt; |
8d88c4ca | 2582 | bfd_vma relocation; |
b34976b6 | 2583 | bfd_boolean unresolved_reloc; |
8d88c4ca | 2584 | bfd_reloc_status_type r; |
bffbf940 | 2585 | int tls_type; |
cbe950e9 | 2586 | asection *base_got; |
8d88c4ca | 2587 | |
c434dee6 | 2588 | r_type = ELF64_R_TYPE (rel->r_info); |
fe4770f4 AJ |
2589 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
2590 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
2591 | continue; | |
8d88c4ca | 2592 | |
bffbf940 | 2593 | if (r_type >= R_X86_64_max) |
8da6118f KH |
2594 | { |
2595 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2596 | return FALSE; |
8da6118f | 2597 | } |
8d88c4ca | 2598 | |
b491616a | 2599 | howto = x86_64_elf_howto_table + r_type; |
c434dee6 | 2600 | r_symndx = ELF64_R_SYM (rel->r_info); |
8d88c4ca NC |
2601 | h = NULL; |
2602 | sym = NULL; | |
2603 | sec = NULL; | |
b34976b6 | 2604 | unresolved_reloc = FALSE; |
8d88c4ca | 2605 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
2606 | { |
2607 | sym = local_syms + r_symndx; | |
2608 | sec = local_sections[r_symndx]; | |
c434dee6 | 2609 | |
c25bc9fc L |
2610 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
2611 | &sec, rel); | |
2612 | ||
2613 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
2614 | if (ELF64_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
2615 | { | |
2616 | h = elf64_x86_64_get_local_sym_hash (htab, input_bfd, | |
2617 | rel, FALSE); | |
2618 | if (h == NULL) | |
2619 | abort (); | |
2620 | ||
2621 | /* Set STT_GNU_IFUNC symbol value. */ | |
2622 | h->root.u.def.value = sym->st_value; | |
2623 | h->root.u.def.section = sec; | |
2624 | } | |
8da6118f | 2625 | } |
8d88c4ca | 2626 | else |
8da6118f | 2627 | { |
560e09e9 | 2628 | bfd_boolean warned; |
c434dee6 | 2629 | |
b2a8e766 AM |
2630 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2631 | r_symndx, symtab_hdr, sym_hashes, | |
2632 | h, sec, relocation, | |
2633 | unresolved_reloc, warned); | |
8da6118f | 2634 | } |
ab96bf03 AM |
2635 | |
2636 | if (sec != NULL && elf_discarded_section (sec)) | |
2637 | { | |
2638 | /* For relocs against symbols from removed linkonce sections, | |
2639 | or sections discarded by a linker script, we just want the | |
2640 | section contents zeroed. Avoid any special processing. */ | |
2641 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
2642 | rel->r_info = 0; | |
2643 | rel->r_addend = 0; | |
2644 | continue; | |
2645 | } | |
2646 | ||
2647 | if (info->relocatable) | |
2648 | continue; | |
2649 | ||
cbe950e9 L |
2650 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
2651 | it here if it is defined in a non-shared object. */ | |
2652 | if (h != NULL | |
2653 | && h->type == STT_GNU_IFUNC | |
2654 | && h->def_regular) | |
2655 | { | |
2656 | asection *plt; | |
2657 | bfd_vma plt_index; | |
4c544807 | 2658 | const char *name; |
cbe950e9 L |
2659 | |
2660 | if ((input_section->flags & SEC_ALLOC) == 0 | |
2661 | || h->plt.offset == (bfd_vma) -1) | |
2662 | abort (); | |
2663 | ||
2664 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 2665 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
cbe950e9 L |
2666 | relocation = (plt->output_section->vma |
2667 | + plt->output_offset + h->plt.offset); | |
2668 | ||
2669 | switch (r_type) | |
2670 | { | |
2671 | default: | |
4c544807 L |
2672 | if (h->root.root.string) |
2673 | name = h->root.root.string; | |
2674 | else | |
2675 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
2676 | NULL); | |
cbe950e9 L |
2677 | (*_bfd_error_handler) |
2678 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
2679 | "symbol `%s' isn't handled by %s"), input_bfd, | |
2680 | x86_64_elf_howto_table[r_type].name, | |
4c544807 | 2681 | name, __FUNCTION__); |
cbe950e9 L |
2682 | bfd_set_error (bfd_error_bad_value); |
2683 | return FALSE; | |
2684 | ||
2685 | case R_X86_64_32S: | |
710ab287 | 2686 | if (info->shared) |
cbe950e9 | 2687 | abort (); |
710ab287 L |
2688 | goto do_relocation; |
2689 | ||
2690 | case R_X86_64_64: | |
2691 | if (rel->r_addend != 0) | |
2692 | { | |
4c544807 L |
2693 | if (h->root.root.string) |
2694 | name = h->root.root.string; | |
2695 | else | |
2696 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
2697 | sym, NULL); | |
710ab287 L |
2698 | (*_bfd_error_handler) |
2699 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
2700 | "symbol `%s' has non-zero addend: %d"), | |
2701 | input_bfd, x86_64_elf_howto_table[r_type].name, | |
4c544807 | 2702 | name, rel->r_addend); |
710ab287 L |
2703 | bfd_set_error (bfd_error_bad_value); |
2704 | return FALSE; | |
2705 | } | |
2706 | ||
2707 | /* Generate dynamic relcoation only when there is a | |
2708 | non-GOF reference in a shared object. */ | |
2709 | if (info->shared && h->non_got_ref) | |
2710 | { | |
2711 | Elf_Internal_Rela outrel; | |
2712 | bfd_byte *loc; | |
2713 | asection *sreloc; | |
2714 | ||
c25bc9fc L |
2715 | /* Need a dynamic relocation to get the real function |
2716 | address. */ | |
710ab287 L |
2717 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
2718 | info, | |
2719 | input_section, | |
2720 | rel->r_offset); | |
2721 | if (outrel.r_offset == (bfd_vma) -1 | |
2722 | || outrel.r_offset == (bfd_vma) -2) | |
2723 | abort (); | |
2724 | ||
2725 | outrel.r_offset += (input_section->output_section->vma | |
2726 | + input_section->output_offset); | |
2727 | ||
2728 | if (h->dynindx == -1 | |
44c4ea11 L |
2729 | || h->forced_local |
2730 | || info->executable) | |
710ab287 L |
2731 | { |
2732 | /* This symbol is resolved locally. */ | |
2733 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_IRELATIVE); | |
2734 | outrel.r_addend = (h->root.u.def.value | |
2735 | + h->root.u.def.section->output_section->vma | |
2736 | + h->root.u.def.section->output_offset); | |
2737 | } | |
2738 | else | |
2739 | { | |
2740 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); | |
2741 | outrel.r_addend = 0; | |
2742 | } | |
2743 | ||
6de2ae4a | 2744 | sreloc = htab->elf.irelifunc; |
710ab287 L |
2745 | loc = sreloc->contents; |
2746 | loc += (sreloc->reloc_count++ | |
2747 | * sizeof (Elf64_External_Rela)); | |
2748 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2749 | ||
2750 | /* If this reloc is against an external symbol, we | |
2751 | do not want to fiddle with the addend. Otherwise, | |
2752 | we need to include the symbol value so that it | |
2753 | becomes an addend for the dynamic reloc. For an | |
2754 | internal symbol, we have updated addend. */ | |
2755 | continue; | |
2756 | } | |
cbe950e9 L |
2757 | |
2758 | case R_X86_64_32: | |
cbe950e9 L |
2759 | case R_X86_64_PC32: |
2760 | case R_X86_64_PC64: | |
2761 | case R_X86_64_PLT32: | |
2762 | goto do_relocation; | |
2763 | ||
2764 | case R_X86_64_GOTPCREL: | |
2765 | case R_X86_64_GOTPCREL64: | |
6de2ae4a | 2766 | base_got = htab->elf.sgot; |
cbe950e9 L |
2767 | off = h->got.offset; |
2768 | ||
7afd84dc | 2769 | if (base_got == NULL) |
cbe950e9 L |
2770 | abort (); |
2771 | ||
7afd84dc | 2772 | if (off == (bfd_vma) -1) |
cbe950e9 | 2773 | { |
7afd84dc L |
2774 | /* We can't use h->got.offset here to save state, or |
2775 | even just remember the offset, as finish_dynamic_symbol | |
2776 | would use that as offset into .got. */ | |
cbe950e9 | 2777 | |
6de2ae4a | 2778 | if (htab->elf.splt != NULL) |
7afd84dc L |
2779 | { |
2780 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
2781 | off = (plt_index + 3) * GOT_ENTRY_SIZE; | |
6de2ae4a | 2782 | base_got = htab->elf.sgotplt; |
7afd84dc | 2783 | } |
cbe950e9 L |
2784 | else |
2785 | { | |
7afd84dc L |
2786 | plt_index = h->plt.offset / PLT_ENTRY_SIZE; |
2787 | off = plt_index * GOT_ENTRY_SIZE; | |
6de2ae4a | 2788 | base_got = htab->elf.igotplt; |
7afd84dc L |
2789 | } |
2790 | ||
2791 | if (h->dynindx == -1 | |
2792 | || h->forced_local | |
2793 | || info->symbolic) | |
2794 | { | |
2795 | /* This references the local defitionion. We must | |
2796 | initialize this entry in the global offset table. | |
2797 | Since the offset must always be a multiple of 8, | |
2798 | we use the least significant bit to record | |
2799 | whether we have initialized it already. | |
2800 | ||
2801 | When doing a dynamic link, we create a .rela.got | |
2802 | relocation entry to initialize the value. This | |
2803 | is done in the finish_dynamic_symbol routine. */ | |
2804 | if ((off & 1) != 0) | |
2805 | off &= ~1; | |
2806 | else | |
2807 | { | |
2808 | bfd_put_64 (output_bfd, relocation, | |
2809 | base_got->contents + off); | |
2810 | /* Note that this is harmless for the GOTPLT64 | |
2811 | case, as -1 | 1 still is -1. */ | |
2812 | h->got.offset |= 1; | |
2813 | } | |
cbe950e9 L |
2814 | } |
2815 | } | |
2816 | ||
2817 | relocation = (base_got->output_section->vma | |
2818 | + base_got->output_offset + off); | |
2819 | ||
2820 | if (r_type != R_X86_64_GOTPCREL | |
2821 | && r_type != R_X86_64_GOTPCREL64) | |
2822 | { | |
2823 | asection *gotplt; | |
6de2ae4a L |
2824 | if (htab->elf.splt != NULL) |
2825 | gotplt = htab->elf.sgotplt; | |
cbe950e9 | 2826 | else |
6de2ae4a | 2827 | gotplt = htab->elf.igotplt; |
cbe950e9 L |
2828 | relocation -= (gotplt->output_section->vma |
2829 | - gotplt->output_offset); | |
2830 | } | |
2831 | ||
2832 | goto do_relocation; | |
2833 | } | |
2834 | } | |
2835 | ||
70256ad8 AJ |
2836 | /* When generating a shared object, the relocations handled here are |
2837 | copied into the output file to be resolved at run time. */ | |
2838 | switch (r_type) | |
2839 | { | |
2840 | case R_X86_64_GOT32: | |
7b81dfbb | 2841 | case R_X86_64_GOT64: |
70256ad8 AJ |
2842 | /* Relocation is to the entry for this symbol in the global |
2843 | offset table. */ | |
70256ad8 | 2844 | case R_X86_64_GOTPCREL: |
7b81dfbb AJ |
2845 | case R_X86_64_GOTPCREL64: |
2846 | /* Use global offset table entry as symbol value. */ | |
2847 | case R_X86_64_GOTPLT64: | |
2848 | /* This is the same as GOT64 for relocation purposes, but | |
2849 | indicates the existence of a PLT entry. The difficulty is, | |
2850 | that we must calculate the GOT slot offset from the PLT | |
2851 | offset, if this symbol got a PLT entry (it was global). | |
2852 | Additionally if it's computed from the PLT entry, then that | |
2853 | GOT offset is relative to .got.plt, not to .got. */ | |
6de2ae4a | 2854 | base_got = htab->elf.sgot; |
7b81dfbb | 2855 | |
6de2ae4a | 2856 | if (htab->elf.sgot == NULL) |
c434dee6 | 2857 | abort (); |
053579d7 | 2858 | |
51e0a107 | 2859 | if (h != NULL) |
70256ad8 | 2860 | { |
b34976b6 | 2861 | bfd_boolean dyn; |
c434dee6 AJ |
2862 | |
2863 | off = h->got.offset; | |
7b81dfbb AJ |
2864 | if (h->needs_plt |
2865 | && h->plt.offset != (bfd_vma)-1 | |
2866 | && off == (bfd_vma)-1) | |
2867 | { | |
2868 | /* We can't use h->got.offset here to save | |
2869 | state, or even just remember the offset, as | |
2870 | finish_dynamic_symbol would use that as offset into | |
2871 | .got. */ | |
2872 | bfd_vma plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
2873 | off = (plt_index + 3) * GOT_ENTRY_SIZE; | |
6de2ae4a | 2874 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
2875 | } |
2876 | ||
c434dee6 | 2877 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 2878 | |
27482721 | 2879 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
51e0a107 | 2880 | || (info->shared |
27482721 | 2881 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
2882 | || (ELF_ST_VISIBILITY (h->other) |
2883 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
2884 | { |
2885 | /* This is actually a static link, or it is a -Bsymbolic | |
2886 | link and the symbol is defined locally, or the symbol | |
407443a3 | 2887 | was forced to be local because of a version file. We |
51e0a107 JH |
2888 | must initialize this entry in the global offset table. |
2889 | Since the offset must always be a multiple of 8, we | |
2890 | use the least significant bit to record whether we | |
2891 | have initialized it already. | |
2892 | ||
2893 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
2894 | relocation entry to initialize the value. This is |
2895 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
2896 | if ((off & 1) != 0) |
2897 | off &= ~1; | |
2898 | else | |
2899 | { | |
2900 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
2901 | base_got->contents + off); |
2902 | /* Note that this is harmless for the GOTPLT64 case, | |
2903 | as -1 | 1 still is -1. */ | |
51e0a107 JH |
2904 | h->got.offset |= 1; |
2905 | } | |
2906 | } | |
053579d7 | 2907 | else |
b34976b6 | 2908 | unresolved_reloc = FALSE; |
70256ad8 | 2909 | } |
51e0a107 JH |
2910 | else |
2911 | { | |
c434dee6 AJ |
2912 | if (local_got_offsets == NULL) |
2913 | abort (); | |
51e0a107 JH |
2914 | |
2915 | off = local_got_offsets[r_symndx]; | |
2916 | ||
2917 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
2918 | the least significant bit to record whether we have |
2919 | already generated the necessary reloc. */ | |
51e0a107 JH |
2920 | if ((off & 1) != 0) |
2921 | off &= ~1; | |
2922 | else | |
2923 | { | |
c434dee6 | 2924 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 2925 | base_got->contents + off); |
51e0a107 JH |
2926 | |
2927 | if (info->shared) | |
2928 | { | |
947216bf | 2929 | asection *s; |
51e0a107 | 2930 | Elf_Internal_Rela outrel; |
947216bf | 2931 | bfd_byte *loc; |
70256ad8 | 2932 | |
51e0a107 JH |
2933 | /* We need to generate a R_X86_64_RELATIVE reloc |
2934 | for the dynamic linker. */ | |
6de2ae4a | 2935 | s = htab->elf.srelgot; |
947216bf | 2936 | if (s == NULL) |
c434dee6 | 2937 | abort (); |
51e0a107 | 2938 | |
7b81dfbb AJ |
2939 | outrel.r_offset = (base_got->output_section->vma |
2940 | + base_got->output_offset | |
51e0a107 JH |
2941 | + off); |
2942 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); | |
2943 | outrel.r_addend = relocation; | |
947216bf AM |
2944 | loc = s->contents; |
2945 | loc += s->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 2946 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
51e0a107 JH |
2947 | } |
2948 | ||
2949 | local_got_offsets[r_symndx] |= 1; | |
2950 | } | |
51e0a107 | 2951 | } |
6a2bda3f | 2952 | |
c434dee6 AJ |
2953 | if (off >= (bfd_vma) -2) |
2954 | abort (); | |
2955 | ||
7b81dfbb AJ |
2956 | relocation = base_got->output_section->vma |
2957 | + base_got->output_offset + off; | |
2958 | if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
2959 | relocation -= htab->elf.sgotplt->output_section->vma |
2960 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 2961 | |
70256ad8 AJ |
2962 | break; |
2963 | ||
d6ab8113 JB |
2964 | case R_X86_64_GOTOFF64: |
2965 | /* Relocation is relative to the start of the global offset | |
2966 | table. */ | |
2967 | ||
2968 | /* Check to make sure it isn't a protected function symbol | |
2969 | for shared library since it may not be local when used | |
2970 | as function address. */ | |
2971 | if (info->shared | |
2972 | && h | |
2973 | && h->def_regular | |
2974 | && h->type == STT_FUNC | |
2975 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
2976 | { | |
2977 | (*_bfd_error_handler) | |
2978 | (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"), | |
2979 | input_bfd, h->root.root.string); | |
2980 | bfd_set_error (bfd_error_bad_value); | |
2981 | return FALSE; | |
2982 | } | |
2983 | ||
2984 | /* Note that sgot is not involved in this | |
2985 | calculation. We always want the start of .got.plt. If we | |
2986 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
2987 | permitted by the ABI, we might have to change this | |
2988 | calculation. */ | |
6de2ae4a L |
2989 | relocation -= htab->elf.sgotplt->output_section->vma |
2990 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
2991 | break; |
2992 | ||
2993 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2994 | case R_X86_64_GOTPC64: |
d6ab8113 | 2995 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
2996 | relocation = htab->elf.sgotplt->output_section->vma |
2997 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
2998 | unresolved_reloc = FALSE; |
2999 | break; | |
7b81dfbb AJ |
3000 | |
3001 | case R_X86_64_PLTOFF64: | |
3002 | /* Relocation is PLT entry relative to GOT. For local | |
3003 | symbols it's the symbol itself relative to GOT. */ | |
3004 | if (h != NULL | |
3005 | /* See PLT32 handling. */ | |
3006 | && h->plt.offset != (bfd_vma) -1 | |
6de2ae4a | 3007 | && htab->elf.splt != NULL) |
7b81dfbb | 3008 | { |
6de2ae4a L |
3009 | relocation = (htab->elf.splt->output_section->vma |
3010 | + htab->elf.splt->output_offset | |
7b81dfbb AJ |
3011 | + h->plt.offset); |
3012 | unresolved_reloc = FALSE; | |
3013 | } | |
3014 | ||
6de2ae4a L |
3015 | relocation -= htab->elf.sgotplt->output_section->vma |
3016 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 3017 | break; |
d6ab8113 | 3018 | |
70256ad8 AJ |
3019 | case R_X86_64_PLT32: |
3020 | /* Relocation is to the entry for this symbol in the | |
3021 | procedure linkage table. */ | |
3022 | ||
3023 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 3024 | without using the procedure linkage table. */ |
70256ad8 AJ |
3025 | if (h == NULL) |
3026 | break; | |
3027 | ||
c434dee6 | 3028 | if (h->plt.offset == (bfd_vma) -1 |
6de2ae4a | 3029 | || htab->elf.splt == NULL) |
70256ad8 AJ |
3030 | { |
3031 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
3032 | happens when statically linking PIC code, or when |
3033 | using -Bsymbolic. */ | |
70256ad8 AJ |
3034 | break; |
3035 | } | |
3036 | ||
6de2ae4a L |
3037 | relocation = (htab->elf.splt->output_section->vma |
3038 | + htab->elf.splt->output_offset | |
70256ad8 | 3039 | + h->plt.offset); |
b34976b6 | 3040 | unresolved_reloc = FALSE; |
70256ad8 AJ |
3041 | break; |
3042 | ||
fd8ab9e5 AJ |
3043 | case R_X86_64_PC8: |
3044 | case R_X86_64_PC16: | |
3045 | case R_X86_64_PC32: | |
6610a52d | 3046 | if (info->shared |
ba3bee0b | 3047 | && (input_section->flags & SEC_ALLOC) != 0 |
90f487df | 3048 | && (input_section->flags & SEC_READONLY) != 0 |
41bed6dd | 3049 | && h != NULL) |
6610a52d | 3050 | { |
41bed6dd L |
3051 | bfd_boolean fail = FALSE; |
3052 | bfd_boolean branch | |
3053 | = (r_type == R_X86_64_PC32 | |
3054 | && is_32bit_relative_branch (contents, rel->r_offset)); | |
3055 | ||
3056 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
3057 | { | |
3058 | /* Symbol is referenced locally. Make sure it is | |
3059 | defined locally or for a branch. */ | |
3060 | fail = !h->def_regular && !branch; | |
3061 | } | |
90f487df | 3062 | else |
41bed6dd L |
3063 | { |
3064 | /* Symbol isn't referenced locally. We only allow | |
3065 | branch to symbol with non-default visibility. */ | |
3066 | fail = (!branch | |
3067 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
3068 | } | |
3069 | ||
3070 | if (fail) | |
3071 | { | |
3072 | const char *fmt; | |
3073 | const char *v; | |
3074 | const char *pic = ""; | |
3075 | ||
3076 | switch (ELF_ST_VISIBILITY (h->other)) | |
3077 | { | |
3078 | case STV_HIDDEN: | |
3079 | v = _("hidden symbol"); | |
3080 | break; | |
3081 | case STV_INTERNAL: | |
3082 | v = _("internal symbol"); | |
3083 | break; | |
3084 | case STV_PROTECTED: | |
3085 | v = _("protected symbol"); | |
3086 | break; | |
3087 | default: | |
3088 | v = _("symbol"); | |
3089 | pic = _("; recompile with -fPIC"); | |
3090 | break; | |
3091 | } | |
3092 | ||
3093 | if (h->def_regular) | |
3094 | fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s"); | |
3095 | else | |
3096 | fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s"); | |
3097 | ||
3098 | (*_bfd_error_handler) (fmt, input_bfd, | |
3099 | x86_64_elf_howto_table[r_type].name, | |
3100 | v, h->root.root.string, pic); | |
3101 | bfd_set_error (bfd_error_bad_value); | |
3102 | return FALSE; | |
3103 | } | |
6610a52d L |
3104 | } |
3105 | /* Fall through. */ | |
3106 | ||
70256ad8 AJ |
3107 | case R_X86_64_8: |
3108 | case R_X86_64_16: | |
3109 | case R_X86_64_32: | |
d6ab8113 | 3110 | case R_X86_64_PC64: |
6b3db546 | 3111 | case R_X86_64_64: |
80643fbc | 3112 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 3113 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 3114 | |
b1e24c02 | 3115 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
3116 | break; |
3117 | ||
3118 | if ((info->shared | |
4bc6e03a AJ |
3119 | && (h == NULL |
3120 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3121 | || h->root.type != bfd_link_hash_undefweak) | |
d8045f23 NC |
3122 | && (! IS_X86_64_PCREL_TYPE (r_type) |
3123 | || ! SYMBOL_CALLS_LOCAL (info, h))) | |
d40d037c AJ |
3124 | || (ELIMINATE_COPY_RELOCS |
3125 | && !info->shared | |
c434dee6 AJ |
3126 | && h != NULL |
3127 | && h->dynindx != -1 | |
f5385ebf AM |
3128 | && !h->non_got_ref |
3129 | && ((h->def_dynamic | |
3130 | && !h->def_regular) | |
c434dee6 | 3131 | || h->root.type == bfd_link_hash_undefweak |
0f88be7a | 3132 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
3133 | { |
3134 | Elf_Internal_Rela outrel; | |
947216bf | 3135 | bfd_byte *loc; |
b34976b6 | 3136 | bfd_boolean skip, relocate; |
c434dee6 | 3137 | asection *sreloc; |
70256ad8 AJ |
3138 | |
3139 | /* When generating a shared object, these relocations | |
3140 | are copied into the output file to be resolved at run | |
407443a3 | 3141 | time. */ |
b34976b6 AM |
3142 | skip = FALSE; |
3143 | relocate = FALSE; | |
70256ad8 | 3144 | |
c629eae0 JJ |
3145 | outrel.r_offset = |
3146 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 3147 | rel->r_offset); |
c629eae0 | 3148 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 3149 | skip = TRUE; |
0fb19cbc | 3150 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 3151 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
3152 | |
3153 | outrel.r_offset += (input_section->output_section->vma | |
3154 | + input_section->output_offset); | |
3155 | ||
3156 | if (skip) | |
0bb2d96a | 3157 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 3158 | |
fd8ab9e5 AJ |
3159 | /* h->dynindx may be -1 if this symbol was marked to |
3160 | become local. */ | |
3161 | else if (h != NULL | |
c434dee6 | 3162 | && h->dynindx != -1 |
d8045f23 NC |
3163 | && (IS_X86_64_PCREL_TYPE (r_type) |
3164 | || ! info->shared | |
3165 | || ! SYMBOLIC_BIND (info, h) | |
3166 | || ! h->def_regular)) | |
70256ad8 | 3167 | { |
70256ad8 | 3168 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
c434dee6 | 3169 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
3170 | } |
3171 | else | |
3172 | { | |
c434dee6 | 3173 | /* This symbol is local, or marked to become local. */ |
607c0e09 AS |
3174 | if (r_type == R_X86_64_64) |
3175 | { | |
b34976b6 | 3176 | relocate = TRUE; |
607c0e09 AS |
3177 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
3178 | outrel.r_addend = relocation + rel->r_addend; | |
3179 | } | |
3180 | else | |
3181 | { | |
3182 | long sindx; | |
3183 | ||
8517fae7 | 3184 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
3185 | sindx = 0; |
3186 | else if (sec == NULL || sec->owner == NULL) | |
3187 | { | |
3188 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3189 | return FALSE; |
607c0e09 AS |
3190 | } |
3191 | else | |
3192 | { | |
3193 | asection *osec; | |
3194 | ||
74541ad4 AM |
3195 | /* We are turning this relocation into one |
3196 | against a section symbol. It would be | |
3197 | proper to subtract the symbol's value, | |
3198 | osec->vma, from the emitted reloc addend, | |
3199 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
3200 | osec = sec->output_section; |
3201 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
3202 | if (sindx == 0) |
3203 | { | |
3204 | asection *oi = htab->elf.text_index_section; | |
3205 | sindx = elf_section_data (oi)->dynindx; | |
3206 | } | |
3207 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
3208 | } |
3209 | ||
3210 | outrel.r_info = ELF64_R_INFO (sindx, r_type); | |
3211 | outrel.r_addend = relocation + rel->r_addend; | |
3212 | } | |
70256ad8 AJ |
3213 | } |
3214 | ||
cbe950e9 | 3215 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 3216 | |
e7c33416 | 3217 | BFD_ASSERT (sreloc != NULL && sreloc->contents != NULL); |
c434dee6 | 3218 | |
947216bf AM |
3219 | loc = sreloc->contents; |
3220 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 3221 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
70256ad8 AJ |
3222 | |
3223 | /* If this reloc is against an external symbol, we do | |
3224 | not want to fiddle with the addend. Otherwise, we | |
3225 | need to include the symbol value so that it becomes | |
3226 | an addend for the dynamic reloc. */ | |
0f88be7a | 3227 | if (! relocate) |
70256ad8 AJ |
3228 | continue; |
3229 | } | |
3230 | ||
3231 | break; | |
3232 | ||
bffbf940 | 3233 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
3234 | case R_X86_64_GOTPC32_TLSDESC: |
3235 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 3236 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
3237 | tls_type = GOT_UNKNOWN; |
3238 | if (h == NULL && local_got_offsets) | |
3239 | tls_type = elf64_x86_64_local_got_tls_type (input_bfd) [r_symndx]; | |
3240 | else if (h != NULL) | |
142411ca L |
3241 | tls_type = elf64_x86_64_hash_entry (h)->tls_type; |
3242 | ||
3243 | if (! elf64_x86_64_tls_transition (info, input_bfd, | |
3244 | input_section, contents, | |
3245 | symtab_hdr, sym_hashes, | |
3246 | &r_type, tls_type, rel, | |
4c544807 | 3247 | relend, h, r_symndx)) |
534a31f6 | 3248 | return FALSE; |
bffbf940 JJ |
3249 | |
3250 | if (r_type == R_X86_64_TPOFF32) | |
3251 | { | |
142411ca L |
3252 | bfd_vma roff = rel->r_offset; |
3253 | ||
bffbf940 | 3254 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 3255 | |
bffbf940 JJ |
3256 | if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
3257 | { | |
bffbf940 | 3258 | /* GD->LE transition. |
abcf1d52 | 3259 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
a3fadc9a | 3260 | .word 0x6666; rex64; call __tls_get_addr |
bffbf940 JJ |
3261 | Change it into: |
3262 | movq %fs:0, %rax | |
3263 | leaq foo@tpoff(%rax), %rax */ | |
142411ca | 3264 | memcpy (contents + roff - 4, |
bffbf940 JJ |
3265 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", |
3266 | 16); | |
eb4ff4d6 L |
3267 | bfd_put_32 (output_bfd, |
3268 | elf64_x86_64_tpoff (info, relocation), | |
142411ca | 3269 | contents + roff + 8); |
a3fadc9a | 3270 | /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ |
bffbf940 JJ |
3271 | rel++; |
3272 | continue; | |
3273 | } | |
67a4f2b7 AO |
3274 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
3275 | { | |
3276 | /* GDesc -> LE transition. | |
3277 | It's originally something like: | |
3278 | leaq x@tlsdesc(%rip), %rax | |
3279 | ||
3280 | Change it to: | |
3281 | movl $x@tpoff, %rax | |
142411ca | 3282 | */ |
67a4f2b7 AO |
3283 | |
3284 | unsigned int val, type, type2; | |
67a4f2b7 | 3285 | |
67a4f2b7 | 3286 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 3287 | type2 = bfd_get_8 (input_bfd, contents + roff - 2); |
67a4f2b7 | 3288 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
3289 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
3290 | contents + roff - 3); | |
3291 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
3292 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3293 | contents + roff - 1); | |
eb4ff4d6 L |
3294 | bfd_put_32 (output_bfd, |
3295 | elf64_x86_64_tpoff (info, relocation), | |
67a4f2b7 AO |
3296 | contents + roff); |
3297 | continue; | |
3298 | } | |
3299 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) | |
3300 | { | |
3301 | /* GDesc -> LE transition. | |
3302 | It's originally: | |
3303 | call *(%rax) | |
3304 | Turn it into: | |
142411ca | 3305 | xchg %ax,%ax. */ |
10efb593 | 3306 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
3307 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3308 | continue; | |
3309 | } | |
142411ca | 3310 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 3311 | { |
bffbf940 JJ |
3312 | /* IE->LE transition: |
3313 | Originally it can be one of: | |
3314 | movq foo@gottpoff(%rip), %reg | |
3315 | addq foo@gottpoff(%rip), %reg | |
3316 | We change it into: | |
3317 | movq $foo, %reg | |
3318 | leaq foo(%reg), %reg | |
3319 | addq $foo, %reg. */ | |
142411ca L |
3320 | |
3321 | unsigned int val, type, reg; | |
3322 | ||
3323 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
3324 | type = bfd_get_8 (input_bfd, contents + roff - 2); | |
3325 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 3326 | reg >>= 3; |
bffbf940 JJ |
3327 | if (type == 0x8b) |
3328 | { | |
3329 | /* movq */ | |
3330 | if (val == 0x4c) | |
3331 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3332 | contents + roff - 3); |
bffbf940 | 3333 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 3334 | contents + roff - 2); |
bffbf940 | 3335 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3336 | contents + roff - 1); |
bffbf940 JJ |
3337 | } |
3338 | else if (reg == 4) | |
3339 | { | |
3340 | /* addq -> addq - addressing with %rsp/%r12 is | |
3341 | special */ | |
3342 | if (val == 0x4c) | |
3343 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3344 | contents + roff - 3); |
bffbf940 | 3345 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 3346 | contents + roff - 2); |
bffbf940 | 3347 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3348 | contents + roff - 1); |
bffbf940 JJ |
3349 | } |
3350 | else | |
3351 | { | |
3352 | /* addq -> leaq */ | |
3353 | if (val == 0x4c) | |
3354 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 3355 | contents + roff - 3); |
bffbf940 | 3356 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 3357 | contents + roff - 2); |
bffbf940 | 3358 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 3359 | contents + roff - 1); |
bffbf940 | 3360 | } |
eb4ff4d6 L |
3361 | bfd_put_32 (output_bfd, |
3362 | elf64_x86_64_tpoff (info, relocation), | |
142411ca | 3363 | contents + roff); |
bffbf940 JJ |
3364 | continue; |
3365 | } | |
142411ca L |
3366 | else |
3367 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
3368 | } |
3369 | ||
6de2ae4a | 3370 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3371 | abort (); |
3372 | ||
3373 | if (h != NULL) | |
67a4f2b7 AO |
3374 | { |
3375 | off = h->got.offset; | |
3376 | offplt = elf64_x86_64_hash_entry (h)->tlsdesc_got; | |
3377 | } | |
bffbf940 JJ |
3378 | else |
3379 | { | |
3380 | if (local_got_offsets == NULL) | |
3381 | abort (); | |
3382 | ||
3383 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 3384 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
3385 | } |
3386 | ||
3387 | if ((off & 1) != 0) | |
3388 | off &= ~1; | |
26e41594 | 3389 | else |
bffbf940 JJ |
3390 | { |
3391 | Elf_Internal_Rela outrel; | |
947216bf | 3392 | bfd_byte *loc; |
bffbf940 | 3393 | int dr_type, indx; |
67a4f2b7 | 3394 | asection *sreloc; |
bffbf940 | 3395 | |
6de2ae4a | 3396 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3397 | abort (); |
3398 | ||
67a4f2b7 AO |
3399 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3400 | ||
3401 | if (GOT_TLS_GDESC_P (tls_type)) | |
3402 | { | |
3403 | outrel.r_info = ELF64_R_INFO (indx, R_X86_64_TLSDESC); | |
3404 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt | |
6de2ae4a L |
3405 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
3406 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
3407 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3408 | + offplt |
3409 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 3410 | sreloc = htab->elf.srelplt; |
67a4f2b7 AO |
3411 | loc = sreloc->contents; |
3412 | loc += sreloc->reloc_count++ | |
3413 | * sizeof (Elf64_External_Rela); | |
3414 | BFD_ASSERT (loc + sizeof (Elf64_External_Rela) | |
3415 | <= sreloc->contents + sreloc->size); | |
3416 | if (indx == 0) | |
eb4ff4d6 | 3417 | outrel.r_addend = relocation - elf64_x86_64_dtpoff_base (info); |
67a4f2b7 AO |
3418 | else |
3419 | outrel.r_addend = 0; | |
3420 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
3421 | } | |
3422 | ||
6de2ae4a | 3423 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 3424 | |
6de2ae4a L |
3425 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3426 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 3427 | |
67a4f2b7 | 3428 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 3429 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
3430 | else if (GOT_TLS_GDESC_P (tls_type)) |
3431 | goto dr_done; | |
bffbf940 JJ |
3432 | else |
3433 | dr_type = R_X86_64_TPOFF64; | |
3434 | ||
6de2ae4a | 3435 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 3436 | outrel.r_addend = 0; |
67a4f2b7 AO |
3437 | if ((dr_type == R_X86_64_TPOFF64 |
3438 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
eb4ff4d6 | 3439 | outrel.r_addend = relocation - elf64_x86_64_dtpoff_base (info); |
bffbf940 JJ |
3440 | outrel.r_info = ELF64_R_INFO (indx, dr_type); |
3441 | ||
67a4f2b7 AO |
3442 | loc = sreloc->contents; |
3443 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
3444 | BFD_ASSERT (loc + sizeof (Elf64_External_Rela) | |
3445 | <= sreloc->contents + sreloc->size); | |
bffbf940 JJ |
3446 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
3447 | ||
67a4f2b7 | 3448 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
3449 | { |
3450 | if (indx == 0) | |
3451 | { | |
d40d037c | 3452 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 3453 | bfd_put_64 (output_bfd, |
eb4ff4d6 | 3454 | relocation - elf64_x86_64_dtpoff_base (info), |
6de2ae4a | 3455 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
3456 | } |
3457 | else | |
3458 | { | |
3459 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3460 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
3461 | outrel.r_info = ELF64_R_INFO (indx, |
3462 | R_X86_64_DTPOFF64); | |
3463 | outrel.r_offset += GOT_ENTRY_SIZE; | |
67a4f2b7 | 3464 | sreloc->reloc_count++; |
947216bf | 3465 | loc += sizeof (Elf64_External_Rela); |
67a4f2b7 AO |
3466 | BFD_ASSERT (loc + sizeof (Elf64_External_Rela) |
3467 | <= sreloc->contents + sreloc->size); | |
947216bf | 3468 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
bffbf940 JJ |
3469 | } |
3470 | } | |
3471 | ||
67a4f2b7 | 3472 | dr_done: |
bffbf940 JJ |
3473 | if (h != NULL) |
3474 | h->got.offset |= 1; | |
3475 | else | |
3476 | local_got_offsets[r_symndx] |= 1; | |
3477 | } | |
3478 | ||
67a4f2b7 AO |
3479 | if (off >= (bfd_vma) -2 |
3480 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 JJ |
3481 | abort (); |
3482 | if (r_type == ELF64_R_TYPE (rel->r_info)) | |
3483 | { | |
67a4f2b7 AO |
3484 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
3485 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
3486 | relocation = htab->elf.sgotplt->output_section->vma |
3487 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3488 | + offplt + htab->sgotplt_jump_table_size; |
3489 | else | |
6de2ae4a L |
3490 | relocation = htab->elf.sgot->output_section->vma |
3491 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3492 | unresolved_reloc = FALSE; |
bffbf940 | 3493 | } |
142411ca | 3494 | else |
67a4f2b7 | 3495 | { |
142411ca | 3496 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 3497 | |
142411ca L |
3498 | if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
3499 | { | |
3500 | /* GD->IE transition. | |
3501 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3502 | .word 0x6666; rex64; call __tls_get_addr@plt | |
3503 | Change it into: | |
3504 | movq %fs:0, %rax | |
3505 | addq foo@gottpoff(%rip), %rax */ | |
3506 | memcpy (contents + roff - 4, | |
3507 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3508 | 16); | |
3509 | ||
6de2ae4a L |
3510 | relocation = (htab->elf.sgot->output_section->vma |
3511 | + htab->elf.sgot->output_offset + off | |
142411ca L |
3512 | - roff |
3513 | - input_section->output_section->vma | |
3514 | - input_section->output_offset | |
3515 | - 12); | |
3516 | bfd_put_32 (output_bfd, relocation, | |
3517 | contents + roff + 8); | |
3518 | /* Skip R_X86_64_PLT32. */ | |
3519 | rel++; | |
3520 | continue; | |
3521 | } | |
3522 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) | |
3523 | { | |
3524 | /* GDesc -> IE transition. | |
3525 | It's originally something like: | |
3526 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 3527 | |
142411ca L |
3528 | Change it to: |
3529 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax | |
3530 | */ | |
67a4f2b7 | 3531 | |
142411ca | 3532 | unsigned int val, type, type2; |
67a4f2b7 | 3533 | |
142411ca L |
3534 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
3535 | type2 = bfd_get_8 (input_bfd, contents + roff - 2); | |
3536 | val = bfd_get_8 (input_bfd, contents + roff - 1); | |
67a4f2b7 | 3537 | |
142411ca L |
3538 | /* Now modify the instruction as appropriate. To |
3539 | turn a leaq into a movq in the form we use it, it | |
3540 | suffices to change the second byte from 0x8d to | |
3541 | 0x8b. */ | |
3542 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
3543 | ||
3544 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
3545 | htab->elf.sgot->output_section->vma |
3546 | + htab->elf.sgot->output_offset + off | |
142411ca L |
3547 | - rel->r_offset |
3548 | - input_section->output_section->vma | |
3549 | - input_section->output_offset | |
3550 | - 4, | |
3551 | contents + roff); | |
3552 | continue; | |
3553 | } | |
3554 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) | |
3555 | { | |
3556 | /* GDesc -> IE transition. | |
3557 | It's originally: | |
3558 | call *(%rax) | |
3559 | ||
3560 | Change it to: | |
3561 | xchg %ax,%ax. */ | |
3562 | ||
3563 | unsigned int val, type; | |
3564 | ||
3565 | type = bfd_get_8 (input_bfd, contents + roff); | |
3566 | val = bfd_get_8 (input_bfd, contents + roff + 1); | |
3567 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
3568 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
3569 | continue; | |
3570 | } | |
3571 | else | |
3572 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 3573 | } |
bffbf940 JJ |
3574 | break; |
3575 | ||
3576 | case R_X86_64_TLSLD: | |
142411ca L |
3577 | if (! elf64_x86_64_tls_transition (info, input_bfd, |
3578 | input_section, contents, | |
3579 | symtab_hdr, sym_hashes, | |
3580 | &r_type, GOT_UNKNOWN, | |
4c544807 | 3581 | rel, relend, h, r_symndx)) |
142411ca | 3582 | return FALSE; |
a3fadc9a | 3583 | |
142411ca L |
3584 | if (r_type != R_X86_64_TLSLD) |
3585 | { | |
bffbf940 | 3586 | /* LD->LE transition: |
a3fadc9a | 3587 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr. |
bffbf940 JJ |
3588 | We change it into: |
3589 | .word 0x6666; .byte 0x66; movl %fs:0, %rax. */ | |
142411ca L |
3590 | |
3591 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
bffbf940 JJ |
3592 | memcpy (contents + rel->r_offset - 3, |
3593 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
a3fadc9a | 3594 | /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ |
bffbf940 JJ |
3595 | rel++; |
3596 | continue; | |
3597 | } | |
3598 | ||
6de2ae4a | 3599 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3600 | abort (); |
3601 | ||
3602 | off = htab->tls_ld_got.offset; | |
3603 | if (off & 1) | |
3604 | off &= ~1; | |
3605 | else | |
3606 | { | |
3607 | Elf_Internal_Rela outrel; | |
947216bf | 3608 | bfd_byte *loc; |
bffbf940 | 3609 | |
6de2ae4a | 3610 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3611 | abort (); |
3612 | ||
6de2ae4a L |
3613 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3614 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
3615 | |
3616 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3617 | htab->elf.sgot->contents + off); |
bffbf940 | 3618 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 3619 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
3620 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_DTPMOD64); |
3621 | outrel.r_addend = 0; | |
6de2ae4a L |
3622 | loc = htab->elf.srelgot->contents; |
3623 | loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
bffbf940 JJ |
3624 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
3625 | htab->tls_ld_got.offset |= 1; | |
3626 | } | |
6de2ae4a L |
3627 | relocation = htab->elf.sgot->output_section->vma |
3628 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3629 | unresolved_reloc = FALSE; |
bffbf940 JJ |
3630 | break; |
3631 | ||
3632 | case R_X86_64_DTPOFF32: | |
a45bb67d | 3633 | if (info->shared || (input_section->flags & SEC_CODE) == 0) |
eb4ff4d6 | 3634 | relocation -= elf64_x86_64_dtpoff_base (info); |
bffbf940 | 3635 | else |
eb4ff4d6 | 3636 | relocation = elf64_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
3637 | break; |
3638 | ||
3639 | case R_X86_64_TPOFF32: | |
3640 | BFD_ASSERT (! info->shared); | |
eb4ff4d6 | 3641 | relocation = elf64_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
3642 | break; |
3643 | ||
70256ad8 AJ |
3644 | default: |
3645 | break; | |
3646 | } | |
8d88c4ca | 3647 | |
239e1f3a AM |
3648 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3649 | because such sections are not SEC_ALLOC and thus ld.so will | |
3650 | not process them. */ | |
c434dee6 | 3651 | if (unresolved_reloc |
239e1f3a | 3652 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
f5385ebf | 3653 | && h->def_dynamic)) |
c434dee6 | 3654 | (*_bfd_error_handler) |
843fe662 | 3655 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
3656 | input_bfd, |
3657 | input_section, | |
c434dee6 | 3658 | (long) rel->r_offset, |
843fe662 | 3659 | howto->name, |
c434dee6 AJ |
3660 | h->root.root.string); |
3661 | ||
cbe950e9 | 3662 | do_relocation: |
8d88c4ca | 3663 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
3664 | contents, rel->r_offset, |
3665 | relocation, rel->r_addend); | |
8d88c4ca NC |
3666 | |
3667 | if (r != bfd_reloc_ok) | |
8da6118f | 3668 | { |
c434dee6 AJ |
3669 | const char *name; |
3670 | ||
3671 | if (h != NULL) | |
3672 | name = h->root.root.string; | |
3673 | else | |
8da6118f | 3674 | { |
c434dee6 AJ |
3675 | name = bfd_elf_string_from_elf_section (input_bfd, |
3676 | symtab_hdr->sh_link, | |
3677 | sym->st_name); | |
3678 | if (name == NULL) | |
b34976b6 | 3679 | return FALSE; |
c434dee6 AJ |
3680 | if (*name == '\0') |
3681 | name = bfd_section_name (input_bfd, sec); | |
3682 | } | |
3683 | ||
3684 | if (r == bfd_reloc_overflow) | |
3685 | { | |
c434dee6 | 3686 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
3687 | (info, (h ? &h->root : NULL), name, howto->name, |
3688 | (bfd_vma) 0, input_bfd, input_section, | |
3689 | rel->r_offset))) | |
b34976b6 | 3690 | return FALSE; |
c434dee6 AJ |
3691 | } |
3692 | else | |
3693 | { | |
3694 | (*_bfd_error_handler) | |
d003868e AM |
3695 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
3696 | input_bfd, input_section, | |
c434dee6 | 3697 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 3698 | return FALSE; |
8da6118f KH |
3699 | } |
3700 | } | |
8d88c4ca | 3701 | } |
70256ad8 | 3702 | |
b34976b6 | 3703 | return TRUE; |
70256ad8 AJ |
3704 | } |
3705 | ||
3706 | /* Finish up dynamic symbol handling. We set the contents of various | |
3707 | dynamic sections here. */ | |
3708 | ||
b34976b6 | 3709 | static bfd_boolean |
27482721 AJ |
3710 | elf64_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
3711 | struct bfd_link_info *info, | |
3712 | struct elf_link_hash_entry *h, | |
3713 | Elf_Internal_Sym *sym) | |
70256ad8 | 3714 | { |
c434dee6 | 3715 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 | 3716 | |
c434dee6 | 3717 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
3718 | |
3719 | if (h->plt.offset != (bfd_vma) -1) | |
3720 | { | |
70256ad8 AJ |
3721 | bfd_vma plt_index; |
3722 | bfd_vma got_offset; | |
3723 | Elf_Internal_Rela rela; | |
947216bf | 3724 | bfd_byte *loc; |
cbe950e9 L |
3725 | asection *plt, *gotplt, *relplt; |
3726 | ||
3727 | /* When building a static executable, use .iplt, .igot.plt and | |
3728 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 3729 | if (htab->elf.splt != NULL) |
cbe950e9 | 3730 | { |
6de2ae4a L |
3731 | plt = htab->elf.splt; |
3732 | gotplt = htab->elf.sgotplt; | |
3733 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
3734 | } |
3735 | else | |
3736 | { | |
6de2ae4a L |
3737 | plt = htab->elf.iplt; |
3738 | gotplt = htab->elf.igotplt; | |
3739 | relplt = htab->elf.irelplt; | |
cbe950e9 | 3740 | } |
70256ad8 AJ |
3741 | |
3742 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 3743 | it up. */ |
cbe950e9 L |
3744 | if ((h->dynindx == -1 |
3745 | && !((h->forced_local || info->executable) | |
3746 | && h->def_regular | |
3747 | && h->type == STT_GNU_IFUNC)) | |
3748 | || plt == NULL | |
3749 | || gotplt == NULL | |
3750 | || relplt == NULL) | |
c434dee6 | 3751 | abort (); |
70256ad8 AJ |
3752 | |
3753 | /* Get the index in the procedure linkage table which | |
3754 | corresponds to this symbol. This is the index of this symbol | |
3755 | in all the symbols for which we are making plt entries. The | |
cbe950e9 L |
3756 | first entry in the procedure linkage table is reserved. |
3757 | ||
3758 | Get the offset into the .got table of the entry that | |
407443a3 | 3759 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
3760 | bytes. The first three are reserved for the dynamic linker. |
3761 | ||
3762 | For static executables, we don't reserve anything. */ | |
3763 | ||
6de2ae4a | 3764 | if (plt == htab->elf.splt) |
cbe950e9 L |
3765 | { |
3766 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
3767 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; | |
3768 | } | |
3769 | else | |
3770 | { | |
3771 | plt_index = h->plt.offset / PLT_ENTRY_SIZE; | |
3772 | got_offset = plt_index * GOT_ENTRY_SIZE; | |
3773 | } | |
70256ad8 AJ |
3774 | |
3775 | /* Fill in the entry in the procedure linkage table. */ | |
cbe950e9 | 3776 | memcpy (plt->contents + h->plt.offset, elf64_x86_64_plt_entry, |
70256ad8 AJ |
3777 | PLT_ENTRY_SIZE); |
3778 | ||
3779 | /* Insert the relocation positions of the plt section. The magic | |
3780 | numbers at the end of the statements are the positions of the | |
3781 | relocations in the plt section. */ | |
653165cc AJ |
3782 | /* Put offset for jmp *name@GOTPCREL(%rip), since the |
3783 | instruction uses 6 bytes, subtract this value. */ | |
3784 | bfd_put_32 (output_bfd, | |
cbe950e9 L |
3785 | (gotplt->output_section->vma |
3786 | + gotplt->output_offset | |
653165cc | 3787 | + got_offset |
cbe950e9 L |
3788 | - plt->output_section->vma |
3789 | - plt->output_offset | |
653165cc AJ |
3790 | - h->plt.offset |
3791 | - 6), | |
cbe950e9 L |
3792 | plt->contents + h->plt.offset + 2); |
3793 | ||
3794 | /* Don't fill PLT entry for static executables. */ | |
6de2ae4a | 3795 | if (plt == htab->elf.splt) |
cbe950e9 L |
3796 | { |
3797 | /* Put relocation index. */ | |
3798 | bfd_put_32 (output_bfd, plt_index, | |
3799 | plt->contents + h->plt.offset + 7); | |
3800 | /* Put offset for jmp .PLT0. */ | |
3801 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), | |
3802 | plt->contents + h->plt.offset + 12); | |
3803 | } | |
70256ad8 | 3804 | |
653165cc AJ |
3805 | /* Fill in the entry in the global offset table, initially this |
3806 | points to the pushq instruction in the PLT which is at offset 6. */ | |
cbe950e9 L |
3807 | bfd_put_64 (output_bfd, (plt->output_section->vma |
3808 | + plt->output_offset | |
70256ad8 | 3809 | + h->plt.offset + 6), |
cbe950e9 | 3810 | gotplt->contents + got_offset); |
70256ad8 AJ |
3811 | |
3812 | /* Fill in the entry in the .rela.plt section. */ | |
cbe950e9 L |
3813 | rela.r_offset = (gotplt->output_section->vma |
3814 | + gotplt->output_offset | |
70256ad8 | 3815 | + got_offset); |
cbe950e9 L |
3816 | if (h->dynindx == -1 |
3817 | || ((info->executable | |
3818 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
3819 | && h->def_regular | |
3820 | && h->type == STT_GNU_IFUNC)) | |
3821 | { | |
3822 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
3823 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
3824 | rela.r_info = ELF64_R_INFO (0, R_X86_64_IRELATIVE); | |
3825 | rela.r_addend = (h->root.u.def.value | |
3826 | + h->root.u.def.section->output_section->vma | |
3827 | + h->root.u.def.section->output_offset); | |
3828 | } | |
3829 | else | |
3830 | { | |
3831 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_JUMP_SLOT); | |
3832 | rela.r_addend = 0; | |
3833 | } | |
3834 | loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela); | |
c434dee6 | 3835 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 | 3836 | |
f5385ebf | 3837 | if (!h->def_regular) |
70256ad8 AJ |
3838 | { |
3839 | /* Mark the symbol as undefined, rather than as defined in | |
47a9f7b3 JJ |
3840 | the .plt section. Leave the value if there were any |
3841 | relocations where pointer equality matters (this is a clue | |
c434dee6 AJ |
3842 | for the dynamic linker, to make function pointer |
3843 | comparisons work between an application and shared | |
47a9f7b3 JJ |
3844 | library), otherwise set it to zero. If a function is only |
3845 | called from a binary, there is no need to slow down | |
3846 | shared libraries because of that. */ | |
70256ad8 | 3847 | sym->st_shndx = SHN_UNDEF; |
f5385ebf | 3848 | if (!h->pointer_equality_needed) |
47a9f7b3 | 3849 | sym->st_value = 0; |
70256ad8 AJ |
3850 | } |
3851 | } | |
3852 | ||
bffbf940 | 3853 | if (h->got.offset != (bfd_vma) -1 |
67a4f2b7 | 3854 | && ! GOT_TLS_GD_ANY_P (elf64_x86_64_hash_entry (h)->tls_type) |
bffbf940 | 3855 | && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE) |
053579d7 | 3856 | { |
053579d7 | 3857 | Elf_Internal_Rela rela; |
947216bf | 3858 | bfd_byte *loc; |
053579d7 AJ |
3859 | |
3860 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 3861 | up. */ |
6de2ae4a | 3862 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 3863 | abort (); |
053579d7 | 3864 | |
6de2ae4a L |
3865 | rela.r_offset = (htab->elf.sgot->output_section->vma |
3866 | + htab->elf.sgot->output_offset | |
dc810e39 | 3867 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
3868 | |
3869 | /* If this is a static link, or it is a -Bsymbolic link and the | |
3870 | symbol is defined locally or was forced to be local because | |
3871 | of a version file, we just want to emit a RELATIVE reloc. | |
3872 | The entry in the global offset table will already have been | |
3873 | initialized in the relocate_section function. */ | |
710ab287 | 3874 | if (h->def_regular |
0018b0a3 L |
3875 | && h->type == STT_GNU_IFUNC) |
3876 | { | |
710ab287 L |
3877 | if (info->shared) |
3878 | { | |
3879 | /* Generate R_X86_64_GLOB_DAT. */ | |
3880 | goto do_glob_dat; | |
3881 | } | |
3882 | else | |
3883 | { | |
3884 | if (!h->pointer_equality_needed) | |
3885 | abort (); | |
3886 | ||
3887 | /* For non-shared object, we can't use .got.plt, which | |
3888 | contains the real function addres if we need pointer | |
3889 | equality. We load the GOT entry with the PLT entry. */ | |
6de2ae4a | 3890 | asection *plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
3891 | bfd_put_64 (output_bfd, (plt->output_section->vma |
3892 | + plt->output_offset | |
3893 | + h->plt.offset), | |
6de2ae4a | 3894 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
3895 | return TRUE; |
3896 | } | |
0018b0a3 L |
3897 | } |
3898 | else if (info->shared | |
3899 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
053579d7 | 3900 | { |
41bed6dd L |
3901 | if (!h->def_regular) |
3902 | return FALSE; | |
cc78d0af | 3903 | BFD_ASSERT((h->got.offset & 1) != 0); |
053579d7 AJ |
3904 | rela.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
3905 | rela.r_addend = (h->root.u.def.value | |
3906 | + h->root.u.def.section->output_section->vma | |
3907 | + h->root.u.def.section->output_offset); | |
3908 | } | |
3909 | else | |
3910 | { | |
3911 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 3912 | do_glob_dat: |
c434dee6 | 3913 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 3914 | htab->elf.sgot->contents + h->got.offset); |
053579d7 AJ |
3915 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_GLOB_DAT); |
3916 | rela.r_addend = 0; | |
3917 | } | |
3918 | ||
6de2ae4a L |
3919 | loc = htab->elf.srelgot->contents; |
3920 | loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 3921 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
053579d7 AJ |
3922 | } |
3923 | ||
f5385ebf | 3924 | if (h->needs_copy) |
70256ad8 | 3925 | { |
70256ad8 | 3926 | Elf_Internal_Rela rela; |
947216bf | 3927 | bfd_byte *loc; |
70256ad8 AJ |
3928 | |
3929 | /* This symbol needs a copy reloc. Set it up. */ | |
3930 | ||
c434dee6 AJ |
3931 | if (h->dynindx == -1 |
3932 | || (h->root.type != bfd_link_hash_defined | |
3933 | && h->root.type != bfd_link_hash_defweak) | |
3934 | || htab->srelbss == NULL) | |
3935 | abort (); | |
70256ad8 AJ |
3936 | |
3937 | rela.r_offset = (h->root.u.def.value | |
3938 | + h->root.u.def.section->output_section->vma | |
3939 | + h->root.u.def.section->output_offset); | |
3940 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_COPY); | |
3941 | rela.r_addend = 0; | |
947216bf AM |
3942 | loc = htab->srelbss->contents; |
3943 | loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 3944 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 AJ |
3945 | } |
3946 | ||
c25bc9fc L |
3947 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may |
3948 | be NULL for local symbols. */ | |
3949 | if (sym != NULL | |
3950 | && (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
3951 | || h == htab->elf.hgot)) | |
70256ad8 AJ |
3952 | sym->st_shndx = SHN_ABS; |
3953 | ||
b34976b6 | 3954 | return TRUE; |
70256ad8 AJ |
3955 | } |
3956 | ||
c25bc9fc L |
3957 | /* Finish up local dynamic symbol handling. We set the contents of |
3958 | various dynamic sections here. */ | |
3959 | ||
3960 | static bfd_boolean | |
3961 | elf64_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) | |
3962 | { | |
3963 | struct elf_link_hash_entry *h | |
3964 | = (struct elf_link_hash_entry *) *slot; | |
3965 | struct bfd_link_info *info | |
3966 | = (struct bfd_link_info *) inf; | |
3967 | ||
3968 | return elf64_x86_64_finish_dynamic_symbol (info->output_bfd, | |
3969 | info, h, NULL); | |
3970 | } | |
3971 | ||
c434dee6 AJ |
3972 | /* Used to decide how to sort relocs in an optimal manner for the |
3973 | dynamic linker, before writing them out. */ | |
3974 | ||
3975 | static enum elf_reloc_type_class | |
27482721 | 3976 | elf64_x86_64_reloc_type_class (const Elf_Internal_Rela *rela) |
c434dee6 AJ |
3977 | { |
3978 | switch ((int) ELF64_R_TYPE (rela->r_info)) | |
3979 | { | |
3980 | case R_X86_64_RELATIVE: | |
3981 | return reloc_class_relative; | |
3982 | case R_X86_64_JUMP_SLOT: | |
3983 | return reloc_class_plt; | |
3984 | case R_X86_64_COPY: | |
3985 | return reloc_class_copy; | |
3986 | default: | |
3987 | return reloc_class_normal; | |
3988 | } | |
3989 | } | |
3990 | ||
70256ad8 AJ |
3991 | /* Finish up the dynamic sections. */ |
3992 | ||
b34976b6 | 3993 | static bfd_boolean |
27482721 | 3994 | elf64_x86_64_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
70256ad8 | 3995 | { |
c434dee6 | 3996 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
3997 | bfd *dynobj; |
3998 | asection *sdyn; | |
70256ad8 | 3999 | |
c434dee6 AJ |
4000 | htab = elf64_x86_64_hash_table (info); |
4001 | dynobj = htab->elf.dynobj; | |
70256ad8 AJ |
4002 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
4003 | ||
c434dee6 | 4004 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 4005 | { |
70256ad8 AJ |
4006 | Elf64_External_Dyn *dyncon, *dynconend; |
4007 | ||
6de2ae4a | 4008 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 4009 | abort (); |
70256ad8 AJ |
4010 | |
4011 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
eea6121a | 4012 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); |
70256ad8 AJ |
4013 | for (; dyncon < dynconend; dyncon++) |
4014 | { | |
4015 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
4016 | asection *s; |
4017 | ||
4018 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); | |
4019 | ||
4020 | switch (dyn.d_tag) | |
4021 | { | |
4022 | default: | |
053579d7 | 4023 | continue; |
70256ad8 AJ |
4024 | |
4025 | case DT_PLTGOT: | |
6de2ae4a | 4026 | s = htab->elf.sgotplt; |
8c37241b | 4027 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 4028 | break; |
70256ad8 AJ |
4029 | |
4030 | case DT_JMPREL: | |
6de2ae4a | 4031 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 4032 | break; |
70256ad8 | 4033 | |
c434dee6 | 4034 | case DT_PLTRELSZ: |
6de2ae4a | 4035 | s = htab->elf.srelplt->output_section; |
eea6121a | 4036 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
4037 | break; |
4038 | ||
4039 | case DT_RELASZ: | |
c434dee6 AJ |
4040 | /* The procedure linkage table relocs (DT_JMPREL) should |
4041 | not be included in the overall relocs (DT_RELA). | |
4042 | Therefore, we override the DT_RELASZ entry here to | |
4043 | make it not include the JMPREL relocs. Since the | |
4044 | linker script arranges for .rela.plt to follow all | |
4045 | other relocation sections, we don't have to worry | |
4046 | about changing the DT_RELA entry. */ | |
6de2ae4a | 4047 | if (htab->elf.srelplt != NULL) |
70256ad8 | 4048 | { |
6de2ae4a | 4049 | s = htab->elf.srelplt->output_section; |
eea6121a | 4050 | dyn.d_un.d_val -= s->size; |
70256ad8 AJ |
4051 | } |
4052 | break; | |
67a4f2b7 AO |
4053 | |
4054 | case DT_TLSDESC_PLT: | |
6de2ae4a | 4055 | s = htab->elf.splt; |
67a4f2b7 AO |
4056 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
4057 | + htab->tlsdesc_plt; | |
4058 | break; | |
4059 | ||
4060 | case DT_TLSDESC_GOT: | |
6de2ae4a | 4061 | s = htab->elf.sgot; |
67a4f2b7 AO |
4062 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
4063 | + htab->tlsdesc_got; | |
4064 | break; | |
70256ad8 | 4065 | } |
c434dee6 | 4066 | |
70256ad8 AJ |
4067 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
4068 | } | |
4069 | ||
c434dee6 | 4070 | /* Fill in the special first entry in the procedure linkage table. */ |
6de2ae4a | 4071 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 4072 | { |
653165cc | 4073 | /* Fill in the first entry in the procedure linkage table. */ |
6de2ae4a | 4074 | memcpy (htab->elf.splt->contents, elf64_x86_64_plt0_entry, |
c434dee6 | 4075 | PLT_ENTRY_SIZE); |
653165cc AJ |
4076 | /* Add offset for pushq GOT+8(%rip), since the instruction |
4077 | uses 6 bytes subtract this value. */ | |
4078 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4079 | (htab->elf.sgotplt->output_section->vma |
4080 | + htab->elf.sgotplt->output_offset | |
653165cc | 4081 | + 8 |
6de2ae4a L |
4082 | - htab->elf.splt->output_section->vma |
4083 | - htab->elf.splt->output_offset | |
653165cc | 4084 | - 6), |
6de2ae4a | 4085 | htab->elf.splt->contents + 2); |
653165cc AJ |
4086 | /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to |
4087 | the end of the instruction. */ | |
4088 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4089 | (htab->elf.sgotplt->output_section->vma |
4090 | + htab->elf.sgotplt->output_offset | |
653165cc | 4091 | + 16 |
6de2ae4a L |
4092 | - htab->elf.splt->output_section->vma |
4093 | - htab->elf.splt->output_offset | |
653165cc | 4094 | - 12), |
6de2ae4a | 4095 | htab->elf.splt->contents + 8); |
653165cc | 4096 | |
6de2ae4a | 4097 | elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize = |
c434dee6 | 4098 | PLT_ENTRY_SIZE; |
67a4f2b7 AO |
4099 | |
4100 | if (htab->tlsdesc_plt) | |
4101 | { | |
4102 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6de2ae4a | 4103 | htab->elf.sgot->contents + htab->tlsdesc_got); |
67a4f2b7 | 4104 | |
6de2ae4a | 4105 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, |
67a4f2b7 AO |
4106 | elf64_x86_64_plt0_entry, |
4107 | PLT_ENTRY_SIZE); | |
4108 | ||
4109 | /* Add offset for pushq GOT+8(%rip), since the | |
4110 | instruction uses 6 bytes subtract this value. */ | |
4111 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4112 | (htab->elf.sgotplt->output_section->vma |
4113 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 4114 | + 8 |
6de2ae4a L |
4115 | - htab->elf.splt->output_section->vma |
4116 | - htab->elf.splt->output_offset | |
67a4f2b7 AO |
4117 | - htab->tlsdesc_plt |
4118 | - 6), | |
6de2ae4a | 4119 | htab->elf.splt->contents + htab->tlsdesc_plt + 2); |
67a4f2b7 AO |
4120 | /* Add offset for jmp *GOT+TDG(%rip), where TGD stands for |
4121 | htab->tlsdesc_got. The 12 is the offset to the end of | |
4122 | the instruction. */ | |
4123 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4124 | (htab->elf.sgot->output_section->vma |
4125 | + htab->elf.sgot->output_offset | |
67a4f2b7 | 4126 | + htab->tlsdesc_got |
6de2ae4a L |
4127 | - htab->elf.splt->output_section->vma |
4128 | - htab->elf.splt->output_offset | |
67a4f2b7 AO |
4129 | - htab->tlsdesc_plt |
4130 | - 12), | |
6de2ae4a | 4131 | htab->elf.splt->contents + htab->tlsdesc_plt + 8); |
67a4f2b7 | 4132 | } |
70256ad8 | 4133 | } |
70256ad8 AJ |
4134 | } |
4135 | ||
6de2ae4a | 4136 | if (htab->elf.sgotplt) |
70256ad8 | 4137 | { |
c434dee6 | 4138 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 4139 | if (htab->elf.sgotplt->size > 0) |
c434dee6 AJ |
4140 | { |
4141 | /* Set the first entry in the global offset table to the address of | |
4142 | the dynamic section. */ | |
4143 | if (sdyn == NULL) | |
6de2ae4a | 4144 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); |
c434dee6 AJ |
4145 | else |
4146 | bfd_put_64 (output_bfd, | |
4147 | sdyn->output_section->vma + sdyn->output_offset, | |
6de2ae4a | 4148 | htab->elf.sgotplt->contents); |
c434dee6 | 4149 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
6de2ae4a L |
4150 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); |
4151 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
c434dee6 | 4152 | } |
70256ad8 | 4153 | |
6de2ae4a | 4154 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = |
c434dee6 AJ |
4155 | GOT_ENTRY_SIZE; |
4156 | } | |
70256ad8 | 4157 | |
6de2ae4a L |
4158 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
4159 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
4160 | = GOT_ENTRY_SIZE; |
4161 | ||
c25bc9fc L |
4162 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
4163 | htab_traverse (htab->loc_hash_table, | |
4164 | elf64_x86_64_finish_local_dynamic_symbol, | |
4165 | info); | |
4166 | ||
b34976b6 | 4167 | return TRUE; |
8d88c4ca NC |
4168 | } |
4169 | ||
4c45e5c9 JJ |
4170 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
4171 | or (bfd_vma) -1 if it should not be included. */ | |
4172 | ||
4173 | static bfd_vma | |
4174 | elf64_x86_64_plt_sym_val (bfd_vma i, const asection *plt, | |
4175 | const arelent *rel ATTRIBUTE_UNUSED) | |
4176 | { | |
4177 | return plt->vma + (i + 1) * PLT_ENTRY_SIZE; | |
4178 | } | |
8df9fc9d | 4179 | |
d2b2c203 DJ |
4180 | /* Handle an x86-64 specific section when reading an object file. This |
4181 | is called when elfcode.h finds a section with an unknown type. */ | |
4182 | ||
4183 | static bfd_boolean | |
6dc132d9 L |
4184 | elf64_x86_64_section_from_shdr (bfd *abfd, |
4185 | Elf_Internal_Shdr *hdr, | |
4186 | const char *name, | |
4187 | int shindex) | |
d2b2c203 DJ |
4188 | { |
4189 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
4190 | return FALSE; | |
4191 | ||
6dc132d9 | 4192 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
4193 | return FALSE; |
4194 | ||
4195 | return TRUE; | |
4196 | } | |
4197 | ||
3b22753a L |
4198 | /* Hook called by the linker routine which adds symbols from an object |
4199 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
4200 | of .bss. */ | |
4201 | ||
4202 | static bfd_boolean | |
4203 | elf64_x86_64_add_symbol_hook (bfd *abfd, | |
d8045f23 | 4204 | struct bfd_link_info *info, |
3b22753a L |
4205 | Elf_Internal_Sym *sym, |
4206 | const char **namep ATTRIBUTE_UNUSED, | |
4207 | flagword *flagsp ATTRIBUTE_UNUSED, | |
d8045f23 NC |
4208 | asection **secp, |
4209 | bfd_vma *valp) | |
3b22753a L |
4210 | { |
4211 | asection *lcomm; | |
4212 | ||
4213 | switch (sym->st_shndx) | |
4214 | { | |
4215 | case SHN_X86_64_LCOMMON: | |
4216 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
4217 | if (lcomm == NULL) | |
4218 | { | |
4219 | lcomm = bfd_make_section_with_flags (abfd, | |
4220 | "LARGE_COMMON", | |
4221 | (SEC_ALLOC | |
4222 | | SEC_IS_COMMON | |
4223 | | SEC_LINKER_CREATED)); | |
4224 | if (lcomm == NULL) | |
4225 | return FALSE; | |
4226 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
4227 | } | |
4228 | *secp = lcomm; | |
4229 | *valp = sym->st_size; | |
4230 | break; | |
4231 | } | |
d8045f23 NC |
4232 | |
4233 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
4234 | elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE; | |
4235 | ||
3b22753a L |
4236 | return TRUE; |
4237 | } | |
4238 | ||
4239 | ||
4240 | /* Given a BFD section, try to locate the corresponding ELF section | |
4241 | index. */ | |
4242 | ||
4243 | static bfd_boolean | |
4244 | elf64_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, | |
4245 | asection *sec, int *index) | |
4246 | { | |
4247 | if (sec == &_bfd_elf_large_com_section) | |
4248 | { | |
4249 | *index = SHN_X86_64_LCOMMON; | |
4250 | return TRUE; | |
4251 | } | |
4252 | return FALSE; | |
4253 | } | |
4254 | ||
4255 | /* Process a symbol. */ | |
4256 | ||
4257 | static void | |
4258 | elf64_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, | |
4259 | asymbol *asym) | |
4260 | { | |
4261 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
4262 | ||
4263 | switch (elfsym->internal_elf_sym.st_shndx) | |
4264 | { | |
4265 | case SHN_X86_64_LCOMMON: | |
4266 | asym->section = &_bfd_elf_large_com_section; | |
4267 | asym->value = elfsym->internal_elf_sym.st_size; | |
4268 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
4269 | asym->flags &= ~BSF_GLOBAL; | |
4270 | break; | |
4271 | } | |
4272 | } | |
4273 | ||
4274 | static bfd_boolean | |
4275 | elf64_x86_64_common_definition (Elf_Internal_Sym *sym) | |
4276 | { | |
4277 | return (sym->st_shndx == SHN_COMMON | |
4278 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
4279 | } | |
4280 | ||
4281 | static unsigned int | |
4282 | elf64_x86_64_common_section_index (asection *sec) | |
4283 | { | |
4284 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
4285 | return SHN_COMMON; | |
4286 | else | |
4287 | return SHN_X86_64_LCOMMON; | |
4288 | } | |
4289 | ||
4290 | static asection * | |
4291 | elf64_x86_64_common_section (asection *sec) | |
4292 | { | |
4293 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
4294 | return bfd_com_section_ptr; | |
4295 | else | |
4296 | return &_bfd_elf_large_com_section; | |
4297 | } | |
4298 | ||
4299 | static bfd_boolean | |
4300 | elf64_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
4301 | struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED, | |
4302 | struct elf_link_hash_entry *h, | |
4303 | Elf_Internal_Sym *sym, | |
00492999 | 4304 | asection **psec, |
3b22753a L |
4305 | bfd_vma *pvalue ATTRIBUTE_UNUSED, |
4306 | unsigned int *pold_alignment ATTRIBUTE_UNUSED, | |
4307 | bfd_boolean *skip ATTRIBUTE_UNUSED, | |
4308 | bfd_boolean *override ATTRIBUTE_UNUSED, | |
4309 | bfd_boolean *type_change_ok ATTRIBUTE_UNUSED, | |
4310 | bfd_boolean *size_change_ok ATTRIBUTE_UNUSED, | |
4311 | bfd_boolean *newdef ATTRIBUTE_UNUSED, | |
4312 | bfd_boolean *newdyn, | |
4313 | bfd_boolean *newdyncommon ATTRIBUTE_UNUSED, | |
4314 | bfd_boolean *newweak ATTRIBUTE_UNUSED, | |
4315 | bfd *abfd ATTRIBUTE_UNUSED, | |
4316 | asection **sec, | |
4317 | bfd_boolean *olddef ATTRIBUTE_UNUSED, | |
4318 | bfd_boolean *olddyn, | |
4319 | bfd_boolean *olddyncommon ATTRIBUTE_UNUSED, | |
4320 | bfd_boolean *oldweak ATTRIBUTE_UNUSED, | |
00492999 | 4321 | bfd *oldbfd, |
3b22753a L |
4322 | asection **oldsec) |
4323 | { | |
4324 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
4325 | normal common symbol. We turn the large common symbol into a |
4326 | normal one. */ | |
3b22753a L |
4327 | if (!*olddyn |
4328 | && h->root.type == bfd_link_hash_common | |
4329 | && !*newdyn | |
4330 | && bfd_is_com_section (*sec) | |
00492999 | 4331 | && *oldsec != *sec) |
3b22753a | 4332 | { |
00492999 L |
4333 | if (sym->st_shndx == SHN_COMMON |
4334 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0) | |
4335 | { | |
4336 | h->root.u.c.p->section | |
4337 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
4338 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
4339 | } | |
4340 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
4341 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0) | |
9a2e389a | 4342 | *psec = *sec = bfd_com_section_ptr; |
3b22753a L |
4343 | } |
4344 | ||
4345 | return TRUE; | |
4346 | } | |
4347 | ||
4348 | static int | |
a6b96beb AM |
4349 | elf64_x86_64_additional_program_headers (bfd *abfd, |
4350 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
4351 | { |
4352 | asection *s; | |
9a2e389a | 4353 | int count = 0; |
3b22753a L |
4354 | |
4355 | /* Check to see if we need a large readonly segment. */ | |
4356 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
4357 | if (s && (s->flags & SEC_LOAD)) | |
4358 | count++; | |
4359 | ||
4360 | /* Check to see if we need a large data segment. Since .lbss sections | |
4361 | is placed right after the .bss section, there should be no need for | |
4362 | a large data segment just because of .lbss. */ | |
4363 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
4364 | if (s && (s->flags & SEC_LOAD)) | |
4365 | count++; | |
4366 | ||
4367 | return count; | |
4368 | } | |
4369 | ||
fdc90cb4 JJ |
4370 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
4371 | ||
4372 | static bfd_boolean | |
4373 | elf64_x86_64_hash_symbol (struct elf_link_hash_entry *h) | |
4374 | { | |
4375 | if (h->plt.offset != (bfd_vma) -1 | |
4376 | && !h->def_regular | |
4377 | && !h->pointer_equality_needed) | |
4378 | return FALSE; | |
4379 | ||
4380 | return _bfd_elf_hash_symbol (h); | |
4381 | } | |
4382 | ||
9a2e389a | 4383 | static const struct bfd_elf_special_section |
3b22753a L |
4384 | elf64_x86_64_special_sections[]= |
4385 | { | |
0112cd26 NC |
4386 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
4387 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
4388 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
4389 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
4390 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
4391 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
4392 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
4393 | }; |
4394 | ||
70256ad8 AJ |
4395 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec |
4396 | #define TARGET_LITTLE_NAME "elf64-x86-64" | |
4397 | #define ELF_ARCH bfd_arch_i386 | |
4398 | #define ELF_MACHINE_CODE EM_X86_64 | |
f7661549 | 4399 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 4400 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 4401 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
4402 | |
4403 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 4404 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
4405 | #define elf_backend_want_got_plt 1 |
4406 | #define elf_backend_plt_readonly 1 | |
4407 | #define elf_backend_want_plt_sym 0 | |
4408 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 4409 | #define elf_backend_rela_normal 1 |
70256ad8 AJ |
4410 | |
4411 | #define elf_info_to_howto elf64_x86_64_info_to_howto | |
70256ad8 | 4412 | |
70256ad8 AJ |
4413 | #define bfd_elf64_bfd_link_hash_table_create \ |
4414 | elf64_x86_64_link_hash_table_create | |
c25bc9fc L |
4415 | #define bfd_elf64_bfd_link_hash_table_free \ |
4416 | elf64_x86_64_link_hash_table_free | |
407443a3 | 4417 | #define bfd_elf64_bfd_reloc_type_lookup elf64_x86_64_reloc_type_lookup |
157090f7 AM |
4418 | #define bfd_elf64_bfd_reloc_name_lookup \ |
4419 | elf64_x86_64_reloc_name_lookup | |
70256ad8 AJ |
4420 | |
4421 | #define elf_backend_adjust_dynamic_symbol elf64_x86_64_adjust_dynamic_symbol | |
13285a1b | 4422 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
70256ad8 | 4423 | #define elf_backend_check_relocs elf64_x86_64_check_relocs |
c434dee6 AJ |
4424 | #define elf_backend_copy_indirect_symbol elf64_x86_64_copy_indirect_symbol |
4425 | #define elf_backend_create_dynamic_sections elf64_x86_64_create_dynamic_sections | |
4426 | #define elf_backend_finish_dynamic_sections elf64_x86_64_finish_dynamic_sections | |
70256ad8 AJ |
4427 | #define elf_backend_finish_dynamic_symbol elf64_x86_64_finish_dynamic_symbol |
4428 | #define elf_backend_gc_mark_hook elf64_x86_64_gc_mark_hook | |
4429 | #define elf_backend_gc_sweep_hook elf64_x86_64_gc_sweep_hook | |
3bab7989 ML |
4430 | #define elf_backend_grok_prstatus elf64_x86_64_grok_prstatus |
4431 | #define elf_backend_grok_psinfo elf64_x86_64_grok_psinfo | |
c434dee6 | 4432 | #define elf_backend_reloc_type_class elf64_x86_64_reloc_type_class |
70256ad8 AJ |
4433 | #define elf_backend_relocate_section elf64_x86_64_relocate_section |
4434 | #define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections | |
67a4f2b7 | 4435 | #define elf_backend_always_size_sections elf64_x86_64_always_size_sections |
74541ad4 | 4436 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
4c45e5c9 | 4437 | #define elf_backend_plt_sym_val elf64_x86_64_plt_sym_val |
407443a3 | 4438 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
bffbf940 | 4439 | #define bfd_elf64_mkobject elf64_x86_64_mkobject |
8d88c4ca | 4440 | |
d2b2c203 DJ |
4441 | #define elf_backend_section_from_shdr \ |
4442 | elf64_x86_64_section_from_shdr | |
4443 | ||
3b22753a L |
4444 | #define elf_backend_section_from_bfd_section \ |
4445 | elf64_x86_64_elf_section_from_bfd_section | |
4446 | #define elf_backend_add_symbol_hook \ | |
4447 | elf64_x86_64_add_symbol_hook | |
4448 | #define elf_backend_symbol_processing \ | |
4449 | elf64_x86_64_symbol_processing | |
4450 | #define elf_backend_common_section_index \ | |
4451 | elf64_x86_64_common_section_index | |
4452 | #define elf_backend_common_section \ | |
4453 | elf64_x86_64_common_section | |
4454 | #define elf_backend_common_definition \ | |
4455 | elf64_x86_64_common_definition | |
4456 | #define elf_backend_merge_symbol \ | |
4457 | elf64_x86_64_merge_symbol | |
4458 | #define elf_backend_special_sections \ | |
4459 | elf64_x86_64_special_sections | |
4460 | #define elf_backend_additional_program_headers \ | |
4461 | elf64_x86_64_additional_program_headers | |
fdc90cb4 JJ |
4462 | #define elf_backend_hash_symbol \ |
4463 | elf64_x86_64_hash_symbol | |
3b22753a | 4464 | |
d8045f23 NC |
4465 | #undef elf_backend_post_process_headers |
4466 | #define elf_backend_post_process_headers _bfd_elf_set_osabi | |
4467 | ||
8d88c4ca | 4468 | #include "elf64-target.h" |
9d7cbccd NC |
4469 | |
4470 | /* FreeBSD support. */ | |
4471 | ||
4472 | #undef TARGET_LITTLE_SYM | |
4473 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec | |
4474 | #undef TARGET_LITTLE_NAME | |
4475 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
4476 | ||
d1036acb L |
4477 | #undef ELF_OSABI |
4478 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 4479 | |
9d7cbccd NC |
4480 | #undef elf64_bed |
4481 | #define elf64_bed elf64_x86_64_fbsd_bed | |
4482 | ||
4483 | #include "elf64-target.h" |