Commit | Line | Data |
---|---|---|
8d88c4ca | 1 | /* X86-64 specific support for 64-bit ELF |
ab96bf03 | 2 | Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
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" |
8d88c4ca NC |
29 | |
30 | #include "elf/x86-64.h" | |
31 | ||
8d88c4ca NC |
32 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
33 | #define MINUS_ONE (~ (bfd_vma) 0) | |
34 | ||
35 | /* The relocation "howto" table. Order of fields: | |
7b81dfbb AJ |
36 | type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow, |
37 | special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */ | |
70256ad8 AJ |
38 | static reloc_howto_type x86_64_elf_howto_table[] = |
39 | { | |
b34976b6 AM |
40 | HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
41 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, | |
42 | FALSE), | |
43 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
44 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, | |
45 | FALSE), | |
46 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
47 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, | |
48 | TRUE), | |
49 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
50 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, | |
51 | FALSE), | |
52 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
53 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, | |
54 | TRUE), | |
55 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
56 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, | |
57 | FALSE), | |
58 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
59 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, | |
60 | MINUS_ONE, FALSE), | |
61 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
62 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, | |
63 | MINUS_ONE, FALSE), | |
64 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
65 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, | |
66 | MINUS_ONE, FALSE), | |
67 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
68 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, | |
69 | 0xffffffff, TRUE), | |
70 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, | |
71 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
72 | FALSE), | |
73 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
74 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, | |
75 | FALSE), | |
76 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
77 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), | |
b0360d8c | 78 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
b34976b6 | 79 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), |
ac2aa337 | 80 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
b34976b6 AM |
81 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), |
82 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
83 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), | |
84 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
85 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, | |
86 | MINUS_ONE, FALSE), | |
87 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
88 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, | |
89 | MINUS_ONE, FALSE), | |
90 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
91 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, | |
92 | MINUS_ONE, FALSE), | |
93 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
94 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, | |
95 | 0xffffffff, TRUE), | |
96 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
97 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, | |
98 | 0xffffffff, TRUE), | |
ac2aa337 | 99 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
b34976b6 AM |
100 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, |
101 | 0xffffffff, FALSE), | |
102 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
103 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, | |
104 | 0xffffffff, TRUE), | |
105 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
106 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, | |
107 | 0xffffffff, FALSE), | |
d6ab8113 JB |
108 | HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
109 | bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE, | |
110 | TRUE), | |
111 | HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
112 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", | |
113 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
114 | HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
115 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", | |
116 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
7b81dfbb AJ |
117 | HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, |
118 | bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE, | |
119 | FALSE), | |
120 | HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
121 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE, | |
122 | MINUS_ONE, TRUE), | |
123 | HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
124 | bfd_elf_generic_reloc, "R_X86_64_GOTPC64", | |
125 | FALSE, MINUS_ONE, MINUS_ONE, TRUE), | |
126 | HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
127 | bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE, | |
128 | MINUS_ONE, FALSE), | |
129 | HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
130 | bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE, | |
131 | MINUS_ONE, FALSE), | |
67a4f2b7 AO |
132 | EMPTY_HOWTO (32), |
133 | EMPTY_HOWTO (33), | |
134 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0, | |
135 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
136 | "R_X86_64_GOTPC32_TLSDESC", | |
137 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
138 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0, | |
139 | complain_overflow_dont, bfd_elf_generic_reloc, | |
140 | "R_X86_64_TLSDESC_CALL", | |
141 | FALSE, 0, 0, FALSE), | |
142 | HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0, | |
143 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
144 | "R_X86_64_TLSDESC", | |
145 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
fe4770f4 | 146 | |
a33d77bc JB |
147 | /* We have a gap in the reloc numbers here. |
148 | R_X86_64_standard counts the number up to this point, and | |
149 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
150 | R_X86_64_GNU_VT* to form an index into this table. */ | |
67a4f2b7 | 151 | #define R_X86_64_standard (R_X86_64_TLSDESC + 1) |
a33d77bc JB |
152 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
153 | ||
fe4770f4 | 154 | /* GNU extension to record C++ vtable hierarchy. */ |
b34976b6 AM |
155 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
156 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
157 | |
158 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
159 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
160 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
161 | FALSE) | |
8d88c4ca NC |
162 | }; |
163 | ||
164 | /* Map BFD relocs to the x86_64 elf relocs. */ | |
70256ad8 AJ |
165 | struct elf_reloc_map |
166 | { | |
8d88c4ca NC |
167 | bfd_reloc_code_real_type bfd_reloc_val; |
168 | unsigned char elf_reloc_val; | |
169 | }; | |
170 | ||
dc810e39 | 171 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 172 | { |
70256ad8 AJ |
173 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
174 | { BFD_RELOC_64, R_X86_64_64, }, | |
175 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
176 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
177 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
178 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
179 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
180 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
181 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
182 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
183 | { BFD_RELOC_32, R_X86_64_32, }, | |
184 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
185 | { BFD_RELOC_16, R_X86_64_16, }, | |
186 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
187 | { BFD_RELOC_8, R_X86_64_8, }, | |
188 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
189 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
190 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
191 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
192 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
193 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
194 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
195 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
196 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
197 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
198 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
199 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
200 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
201 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
202 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
203 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
204 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
67a4f2b7 AO |
205 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
206 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
207 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
fe4770f4 AJ |
208 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
209 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
210 | }; |
211 | ||
67a4f2b7 AO |
212 | static reloc_howto_type * |
213 | elf64_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) | |
214 | { | |
215 | unsigned i; | |
216 | ||
217 | if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
218 | || r_type >= (unsigned int) R_X86_64_max) | |
219 | { | |
220 | if (r_type >= (unsigned int) R_X86_64_standard) | |
221 | { | |
222 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), | |
223 | abfd, (int) r_type); | |
224 | r_type = R_X86_64_NONE; | |
225 | } | |
226 | i = r_type; | |
227 | } | |
228 | else | |
229 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
230 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
231 | return &x86_64_elf_howto_table[i]; | |
232 | } | |
8d88c4ca NC |
233 | |
234 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
235 | static reloc_howto_type * | |
67a4f2b7 | 236 | elf64_x86_64_reloc_type_lookup (bfd *abfd, |
27482721 | 237 | bfd_reloc_code_real_type code) |
8d88c4ca NC |
238 | { |
239 | unsigned int i; | |
27482721 | 240 | |
8d88c4ca NC |
241 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
242 | i++) | |
243 | { | |
244 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
67a4f2b7 AO |
245 | return elf64_x86_64_rtype_to_howto (abfd, |
246 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca NC |
247 | } |
248 | return 0; | |
249 | } | |
250 | ||
157090f7 AM |
251 | static reloc_howto_type * |
252 | elf64_x86_64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
253 | const char *r_name) | |
254 | { | |
255 | unsigned int i; | |
256 | ||
257 | for (i = 0; | |
258 | i < (sizeof (x86_64_elf_howto_table) | |
259 | / sizeof (x86_64_elf_howto_table[0])); | |
260 | i++) | |
261 | if (x86_64_elf_howto_table[i].name != NULL | |
262 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
263 | return &x86_64_elf_howto_table[i]; | |
264 | ||
265 | return NULL; | |
266 | } | |
267 | ||
8d88c4ca | 268 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 269 | |
8d88c4ca | 270 | static void |
27482721 AJ |
271 | elf64_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
272 | Elf_Internal_Rela *dst) | |
8d88c4ca | 273 | { |
67a4f2b7 | 274 | unsigned r_type; |
8d88c4ca NC |
275 | |
276 | r_type = ELF64_R_TYPE (dst->r_info); | |
67a4f2b7 | 277 | cache_ptr->howto = elf64_x86_64_rtype_to_howto (abfd, r_type); |
8d88c4ca NC |
278 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
279 | } | |
70256ad8 | 280 | \f |
3bab7989 | 281 | /* Support for core dump NOTE sections. */ |
b34976b6 | 282 | static bfd_boolean |
27482721 | 283 | elf64_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
284 | { |
285 | int offset; | |
eea6121a | 286 | size_t size; |
3bab7989 ML |
287 | |
288 | switch (note->descsz) | |
289 | { | |
290 | default: | |
b34976b6 | 291 | return FALSE; |
3bab7989 ML |
292 | |
293 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ | |
294 | /* pr_cursig */ | |
cedb70c5 | 295 | elf_tdata (abfd)->core_signal |
3bab7989 ML |
296 | = bfd_get_16 (abfd, note->descdata + 12); |
297 | ||
298 | /* pr_pid */ | |
cedb70c5 | 299 | elf_tdata (abfd)->core_pid |
3bab7989 ML |
300 | = bfd_get_32 (abfd, note->descdata + 32); |
301 | ||
302 | /* pr_reg */ | |
303 | offset = 112; | |
eea6121a | 304 | size = 216; |
3bab7989 ML |
305 | |
306 | break; | |
307 | } | |
308 | ||
309 | /* Make a ".reg/999" section. */ | |
310 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 311 | size, note->descpos + offset); |
3bab7989 ML |
312 | } |
313 | ||
b34976b6 | 314 | static bfd_boolean |
27482721 | 315 | elf64_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
316 | { |
317 | switch (note->descsz) | |
318 | { | |
319 | default: | |
b34976b6 | 320 | return FALSE; |
3bab7989 ML |
321 | |
322 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ | |
323 | elf_tdata (abfd)->core_program | |
324 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); | |
325 | elf_tdata (abfd)->core_command | |
326 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); | |
327 | } | |
328 | ||
329 | /* Note that for some reason, a spurious space is tacked | |
330 | onto the end of the args in some (at least one anyway) | |
331 | implementations, so strip it off if it exists. */ | |
332 | ||
333 | { | |
334 | char *command = elf_tdata (abfd)->core_command; | |
335 | int n = strlen (command); | |
336 | ||
337 | if (0 < n && command[n - 1] == ' ') | |
338 | command[n - 1] = '\0'; | |
339 | } | |
340 | ||
b34976b6 | 341 | return TRUE; |
3bab7989 ML |
342 | } |
343 | \f | |
407443a3 | 344 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 345 | |
407443a3 | 346 | /* The name of the dynamic interpreter. This is put in the .interp |
70256ad8 AJ |
347 | section. */ |
348 | ||
407443a3 | 349 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
70256ad8 | 350 | |
d40d037c AJ |
351 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
352 | copying dynamic variables from a shared lib into an app's dynbss | |
353 | section, and instead use a dynamic relocation to point into the | |
354 | shared lib. */ | |
355 | #define ELIMINATE_COPY_RELOCS 1 | |
356 | ||
70256ad8 AJ |
357 | /* The size in bytes of an entry in the global offset table. */ |
358 | ||
359 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 360 | |
70256ad8 | 361 | /* The size in bytes of an entry in the procedure linkage table. */ |
8d88c4ca | 362 | |
70256ad8 AJ |
363 | #define PLT_ENTRY_SIZE 16 |
364 | ||
365 | /* The first entry in a procedure linkage table looks like this. See the | |
366 | SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */ | |
367 | ||
368 | static const bfd_byte elf64_x86_64_plt0_entry[PLT_ENTRY_SIZE] = | |
369 | { | |
653165cc AJ |
370 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
371 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 372 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
373 | }; |
374 | ||
375 | /* Subsequent entries in a procedure linkage table look like this. */ | |
376 | ||
377 | static const bfd_byte elf64_x86_64_plt_entry[PLT_ENTRY_SIZE] = | |
378 | { | |
653165cc | 379 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 380 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 381 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
382 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
383 | 0xe9, /* jmp relative */ | |
384 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
385 | }; | |
386 | ||
387 | /* The x86-64 linker needs to keep track of the number of relocs that | |
985142a4 | 388 | it decides to copy as dynamic relocs in check_relocs for each symbol. |
c434dee6 AJ |
389 | This is so that it can later discard them if they are found to be |
390 | unnecessary. We store the information in a field extending the | |
391 | regular ELF linker hash table. */ | |
70256ad8 | 392 | |
c434dee6 | 393 | struct elf64_x86_64_dyn_relocs |
70256ad8 AJ |
394 | { |
395 | /* Next section. */ | |
c434dee6 AJ |
396 | struct elf64_x86_64_dyn_relocs *next; |
397 | ||
398 | /* The input section of the reloc. */ | |
399 | asection *sec; | |
400 | ||
401 | /* Total number of relocs copied for the input section. */ | |
70256ad8 | 402 | bfd_size_type count; |
c434dee6 AJ |
403 | |
404 | /* Number of pc-relative relocs copied for the input section. */ | |
405 | bfd_size_type pc_count; | |
70256ad8 AJ |
406 | }; |
407 | ||
408 | /* x86-64 ELF linker hash entry. */ | |
409 | ||
410 | struct elf64_x86_64_link_hash_entry | |
411 | { | |
c434dee6 | 412 | struct elf_link_hash_entry elf; |
70256ad8 | 413 | |
c434dee6 AJ |
414 | /* Track dynamic relocs copied for this symbol. */ |
415 | struct elf64_x86_64_dyn_relocs *dyn_relocs; | |
bffbf940 JJ |
416 | |
417 | #define GOT_UNKNOWN 0 | |
418 | #define GOT_NORMAL 1 | |
419 | #define GOT_TLS_GD 2 | |
420 | #define GOT_TLS_IE 3 | |
67a4f2b7 AO |
421 | #define GOT_TLS_GDESC 4 |
422 | #define GOT_TLS_GD_BOTH_P(type) \ | |
423 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
424 | #define GOT_TLS_GD_P(type) \ | |
425 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
426 | #define GOT_TLS_GDESC_P(type) \ | |
427 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
428 | #define GOT_TLS_GD_ANY_P(type) \ | |
429 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
bffbf940 | 430 | unsigned char tls_type; |
67a4f2b7 AO |
431 | |
432 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, | |
433 | starting at the end of the jump table. */ | |
434 | bfd_vma tlsdesc_got; | |
bffbf940 JJ |
435 | }; |
436 | ||
437 | #define elf64_x86_64_hash_entry(ent) \ | |
438 | ((struct elf64_x86_64_link_hash_entry *)(ent)) | |
439 | ||
440 | struct elf64_x86_64_obj_tdata | |
441 | { | |
442 | struct elf_obj_tdata root; | |
443 | ||
444 | /* tls_type for each local got entry. */ | |
445 | char *local_got_tls_type; | |
67a4f2b7 AO |
446 | |
447 | /* GOTPLT entries for TLS descriptors. */ | |
448 | bfd_vma *local_tlsdesc_gotent; | |
70256ad8 AJ |
449 | }; |
450 | ||
bffbf940 JJ |
451 | #define elf64_x86_64_tdata(abfd) \ |
452 | ((struct elf64_x86_64_obj_tdata *) (abfd)->tdata.any) | |
453 | ||
454 | #define elf64_x86_64_local_got_tls_type(abfd) \ | |
455 | (elf64_x86_64_tdata (abfd)->local_got_tls_type) | |
456 | ||
67a4f2b7 AO |
457 | #define elf64_x86_64_local_tlsdesc_gotent(abfd) \ |
458 | (elf64_x86_64_tdata (abfd)->local_tlsdesc_gotent) | |
bffbf940 | 459 | |
c434dee6 | 460 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 461 | |
407443a3 AJ |
462 | struct elf64_x86_64_link_hash_table |
463 | { | |
c434dee6 | 464 | struct elf_link_hash_table elf; |
70256ad8 | 465 | |
c434dee6 AJ |
466 | /* Short-cuts to get to dynamic linker sections. */ |
467 | asection *sgot; | |
468 | asection *sgotplt; | |
469 | asection *srelgot; | |
470 | asection *splt; | |
471 | asection *srelplt; | |
472 | asection *sdynbss; | |
473 | asection *srelbss; | |
70256ad8 | 474 | |
67a4f2b7 AO |
475 | /* The offset into splt of the PLT entry for the TLS descriptor |
476 | resolver. Special values are 0, if not necessary (or not found | |
477 | to be necessary yet), and -1 if needed but not determined | |
478 | yet. */ | |
479 | bfd_vma tlsdesc_plt; | |
480 | /* The offset into sgot of the GOT entry used by the PLT entry | |
481 | above. */ | |
482 | bfd_vma tlsdesc_got; | |
483 | ||
bffbf940 JJ |
484 | union { |
485 | bfd_signed_vma refcount; | |
486 | bfd_vma offset; | |
487 | } tls_ld_got; | |
488 | ||
67a4f2b7 AO |
489 | /* The amount of space used by the jump slots in the GOT. */ |
490 | bfd_vma sgotplt_jump_table_size; | |
491 | ||
c434dee6 AJ |
492 | /* Small local sym to section mapping cache. */ |
493 | struct sym_sec_cache sym_sec; | |
494 | }; | |
70256ad8 AJ |
495 | |
496 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca NC |
497 | |
498 | #define elf64_x86_64_hash_table(p) \ | |
499 | ((struct elf64_x86_64_link_hash_table *) ((p)->hash)) | |
500 | ||
67a4f2b7 AO |
501 | #define elf64_x86_64_compute_jump_table_size(htab) \ |
502 | ((htab)->srelplt->reloc_count * GOT_ENTRY_SIZE) | |
503 | ||
407443a3 | 504 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
505 | |
506 | static struct bfd_hash_entry * | |
27482721 AJ |
507 | link_hash_newfunc (struct bfd_hash_entry *entry, struct bfd_hash_table *table, |
508 | const char *string) | |
70256ad8 | 509 | { |
70256ad8 | 510 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
511 | subclass. */ |
512 | if (entry == NULL) | |
513 | { | |
514 | entry = bfd_hash_allocate (table, | |
515 | sizeof (struct elf64_x86_64_link_hash_entry)); | |
516 | if (entry == NULL) | |
517 | return entry; | |
518 | } | |
70256ad8 AJ |
519 | |
520 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
521 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
522 | if (entry != NULL) | |
70256ad8 | 523 | { |
c434dee6 AJ |
524 | struct elf64_x86_64_link_hash_entry *eh; |
525 | ||
526 | eh = (struct elf64_x86_64_link_hash_entry *) entry; | |
527 | eh->dyn_relocs = NULL; | |
bffbf940 | 528 | eh->tls_type = GOT_UNKNOWN; |
67a4f2b7 | 529 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
530 | } |
531 | ||
c434dee6 | 532 | return entry; |
70256ad8 AJ |
533 | } |
534 | ||
8d88c4ca NC |
535 | /* Create an X86-64 ELF linker hash table. */ |
536 | ||
537 | static struct bfd_link_hash_table * | |
27482721 | 538 | elf64_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca NC |
539 | { |
540 | struct elf64_x86_64_link_hash_table *ret; | |
dc810e39 | 541 | bfd_size_type amt = sizeof (struct elf64_x86_64_link_hash_table); |
8d88c4ca | 542 | |
e2d34d7d | 543 | ret = (struct elf64_x86_64_link_hash_table *) bfd_malloc (amt); |
c434dee6 | 544 | if (ret == NULL) |
8d88c4ca NC |
545 | return NULL; |
546 | ||
66eb6687 AM |
547 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, |
548 | sizeof (struct elf64_x86_64_link_hash_entry))) | |
8d88c4ca | 549 | { |
e2d34d7d | 550 | free (ret); |
8d88c4ca NC |
551 | return NULL; |
552 | } | |
553 | ||
c434dee6 AJ |
554 | ret->sgot = NULL; |
555 | ret->sgotplt = NULL; | |
556 | ret->srelgot = NULL; | |
557 | ret->splt = NULL; | |
558 | ret->srelplt = NULL; | |
559 | ret->sdynbss = NULL; | |
560 | ret->srelbss = NULL; | |
561 | ret->sym_sec.abfd = NULL; | |
67a4f2b7 AO |
562 | ret->tlsdesc_plt = 0; |
563 | ret->tlsdesc_got = 0; | |
bffbf940 | 564 | ret->tls_ld_got.refcount = 0; |
67a4f2b7 | 565 | ret->sgotplt_jump_table_size = 0; |
c434dee6 AJ |
566 | |
567 | return &ret->elf.root; | |
568 | } | |
569 | ||
570 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
571 | shortcuts to them in our hash table. */ | |
572 | ||
b34976b6 | 573 | static bfd_boolean |
27482721 | 574 | create_got_section (bfd *dynobj, struct bfd_link_info *info) |
c434dee6 AJ |
575 | { |
576 | struct elf64_x86_64_link_hash_table *htab; | |
577 | ||
578 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 579 | return FALSE; |
c434dee6 AJ |
580 | |
581 | htab = elf64_x86_64_hash_table (info); | |
582 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
583 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
584 | if (!htab->sgot || !htab->sgotplt) | |
585 | abort (); | |
586 | ||
3496cb2a L |
587 | htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got", |
588 | (SEC_ALLOC | SEC_LOAD | |
589 | | SEC_HAS_CONTENTS | |
590 | | SEC_IN_MEMORY | |
591 | | SEC_LINKER_CREATED | |
592 | | SEC_READONLY)); | |
c434dee6 | 593 | if (htab->srelgot == NULL |
c434dee6 | 594 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) |
b34976b6 AM |
595 | return FALSE; |
596 | return TRUE; | |
c434dee6 AJ |
597 | } |
598 | ||
599 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
600 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
601 | hash table. */ | |
602 | ||
b34976b6 | 603 | static bfd_boolean |
27482721 | 604 | elf64_x86_64_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
c434dee6 AJ |
605 | { |
606 | struct elf64_x86_64_link_hash_table *htab; | |
607 | ||
608 | htab = elf64_x86_64_hash_table (info); | |
609 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
b34976b6 | 610 | return FALSE; |
c434dee6 AJ |
611 | |
612 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
b34976b6 | 613 | return FALSE; |
c434dee6 AJ |
614 | |
615 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
616 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
617 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
618 | if (!info->shared) | |
619 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
620 | ||
621 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
622 | || (!info->shared && !htab->srelbss)) | |
623 | abort (); | |
624 | ||
b34976b6 | 625 | return TRUE; |
c434dee6 AJ |
626 | } |
627 | ||
628 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
629 | ||
630 | static void | |
fcfa13d2 | 631 | elf64_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
27482721 AJ |
632 | struct elf_link_hash_entry *dir, |
633 | struct elf_link_hash_entry *ind) | |
c434dee6 AJ |
634 | { |
635 | struct elf64_x86_64_link_hash_entry *edir, *eind; | |
636 | ||
637 | edir = (struct elf64_x86_64_link_hash_entry *) dir; | |
638 | eind = (struct elf64_x86_64_link_hash_entry *) ind; | |
639 | ||
640 | if (eind->dyn_relocs != NULL) | |
641 | { | |
642 | if (edir->dyn_relocs != NULL) | |
643 | { | |
644 | struct elf64_x86_64_dyn_relocs **pp; | |
645 | struct elf64_x86_64_dyn_relocs *p; | |
646 | ||
fcfa13d2 | 647 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
648 | list. Merge any entries against the same section. */ |
649 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
650 | { | |
651 | struct elf64_x86_64_dyn_relocs *q; | |
652 | ||
653 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
654 | if (q->sec == p->sec) | |
655 | { | |
656 | q->pc_count += p->pc_count; | |
657 | q->count += p->count; | |
658 | *pp = p->next; | |
659 | break; | |
660 | } | |
661 | if (q == NULL) | |
662 | pp = &p->next; | |
663 | } | |
664 | *pp = edir->dyn_relocs; | |
665 | } | |
666 | ||
667 | edir->dyn_relocs = eind->dyn_relocs; | |
668 | eind->dyn_relocs = NULL; | |
669 | } | |
670 | ||
bffbf940 JJ |
671 | if (ind->root.type == bfd_link_hash_indirect |
672 | && dir->got.refcount <= 0) | |
673 | { | |
674 | edir->tls_type = eind->tls_type; | |
675 | eind->tls_type = GOT_UNKNOWN; | |
676 | } | |
677 | ||
d40d037c AJ |
678 | if (ELIMINATE_COPY_RELOCS |
679 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
680 | && dir->dynamic_adjusted) |
681 | { | |
682 | /* If called to transfer flags for a weakdef during processing | |
683 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
684 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
685 | dir->ref_dynamic |= ind->ref_dynamic; | |
686 | dir->ref_regular |= ind->ref_regular; | |
687 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
688 | dir->needs_plt |= ind->needs_plt; | |
689 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
690 | } | |
d40d037c | 691 | else |
fcfa13d2 | 692 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
8d88c4ca NC |
693 | } |
694 | ||
b34976b6 | 695 | static bfd_boolean |
27482721 | 696 | elf64_x86_64_mkobject (bfd *abfd) |
8d88c4ca | 697 | { |
bffbf940 | 698 | if (abfd->tdata.any == NULL) |
62d7a5f6 AM |
699 | { |
700 | bfd_size_type amt = sizeof (struct elf64_x86_64_obj_tdata); | |
701 | abfd->tdata.any = bfd_zalloc (abfd, amt); | |
702 | if (abfd->tdata.any == NULL) | |
703 | return FALSE; | |
704 | } | |
705 | return bfd_elf_mkobject (abfd); | |
bffbf940 JJ |
706 | } |
707 | ||
b34976b6 | 708 | static bfd_boolean |
27482721 | 709 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 710 | { |
8d88c4ca NC |
711 | /* Set the right machine number for an x86-64 elf64 file. */ |
712 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 713 | return TRUE; |
8d88c4ca NC |
714 | } |
715 | ||
142411ca L |
716 | typedef union |
717 | { | |
718 | unsigned char c[2]; | |
719 | uint16_t i; | |
720 | } | |
721 | x86_64_opcode16; | |
722 | ||
723 | typedef union | |
724 | { | |
725 | unsigned char c[4]; | |
726 | uint32_t i; | |
727 | } | |
728 | x86_64_opcode32; | |
729 | ||
730 | /* Return TRUE if the TLS access code sequence support transition | |
731 | from R_TYPE. */ | |
732 | ||
733 | static bfd_boolean | |
734 | elf64_x86_64_check_tls_transition (bfd *abfd, asection *sec, | |
735 | bfd_byte *contents, | |
736 | Elf_Internal_Shdr *symtab_hdr, | |
737 | struct elf_link_hash_entry **sym_hashes, | |
738 | unsigned int r_type, | |
739 | const Elf_Internal_Rela *rel, | |
740 | const Elf_Internal_Rela *relend) | |
bffbf940 | 741 | { |
142411ca L |
742 | unsigned int val; |
743 | unsigned long r_symndx; | |
744 | struct elf_link_hash_entry *h; | |
745 | bfd_vma offset; | |
746 | ||
747 | /* Get the section contents. */ | |
748 | if (contents == NULL) | |
749 | { | |
750 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
751 | contents = elf_section_data (sec)->this_hdr.contents; | |
752 | else | |
753 | { | |
754 | /* FIXME: How to better handle error condition? */ | |
755 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
756 | return FALSE; | |
bffbf940 | 757 | |
142411ca L |
758 | /* Cache the section contents for elf_link_input_bfd. */ |
759 | elf_section_data (sec)->this_hdr.contents = contents; | |
760 | } | |
761 | } | |
762 | ||
763 | offset = rel->r_offset; | |
bffbf940 | 764 | switch (r_type) |
142411ca L |
765 | { |
766 | case R_X86_64_TLSGD: | |
767 | case R_X86_64_TLSLD: | |
768 | if ((rel + 1) >= relend) | |
769 | return FALSE; | |
770 | ||
771 | if (r_type == R_X86_64_TLSGD) | |
772 | { | |
773 | /* Check transition from GD access model. Only | |
774 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
775 | .word 0x6666; rex64; call __tls_get_addr | |
776 | can transit to different access model. */ | |
777 | ||
778 | static x86_64_opcode32 leaq = { { 0x66, 0x48, 0x8d, 0x3d } }, | |
779 | call = { { 0x66, 0x66, 0x48, 0xe8 } }; | |
780 | if (offset < 4 | |
781 | || (offset + 12) > sec->size | |
782 | || bfd_get_32 (abfd, contents + offset - 4) != leaq.i | |
783 | || bfd_get_32 (abfd, contents + offset + 4) != call.i) | |
784 | return FALSE; | |
785 | } | |
786 | else | |
787 | { | |
788 | /* Check transition from LD access model. Only | |
789 | leaq foo@tlsld(%rip), %rdi; | |
790 | call __tls_get_addr | |
791 | can transit to different access model. */ | |
792 | ||
793 | static x86_64_opcode32 ld = { { 0x48, 0x8d, 0x3d, 0xe8 } }; | |
794 | x86_64_opcode32 op; | |
795 | ||
796 | if (offset < 3 || (offset + 9) > sec->size) | |
797 | return FALSE; | |
798 | ||
799 | op.i = bfd_get_32 (abfd, contents + offset - 3); | |
800 | op.c[3] = bfd_get_8 (abfd, contents + offset + 4); | |
801 | if (op.i != ld.i) | |
802 | return FALSE; | |
803 | } | |
804 | ||
805 | r_symndx = ELF64_R_SYM (rel[1].r_info); | |
806 | if (r_symndx < symtab_hdr->sh_info) | |
807 | return FALSE; | |
808 | ||
809 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
810 | return (h != NULL | |
811 | && h->root.root.string != NULL | |
812 | && (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PC32 | |
813 | || ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32) | |
814 | && (strcmp (h->root.root.string, "__tls_get_addr") == 0)); | |
815 | ||
816 | case R_X86_64_GOTTPOFF: | |
817 | /* Check transition from IE access model: | |
818 | movq foo@gottpoff(%rip), %reg | |
819 | addq foo@gottpoff(%rip), %reg | |
820 | */ | |
821 | ||
822 | if (offset < 3 || (offset + 4) > sec->size) | |
823 | return FALSE; | |
824 | ||
825 | val = bfd_get_8 (abfd, contents + offset - 3); | |
826 | if (val != 0x48 && val != 0x4c) | |
827 | return FALSE; | |
828 | ||
829 | val = bfd_get_8 (abfd, contents + offset - 2); | |
830 | if (val != 0x8b && val != 0x03) | |
831 | return FALSE; | |
832 | ||
833 | val = bfd_get_8 (abfd, contents + offset - 1); | |
834 | return (val & 0xc7) == 5; | |
835 | ||
836 | case R_X86_64_GOTPC32_TLSDESC: | |
837 | /* Check transition from GDesc access model: | |
838 | leaq x@tlsdesc(%rip), %rax | |
839 | ||
840 | Make sure it's a leaq adding rip to a 32-bit offset | |
841 | into any register, although it's probably almost always | |
842 | going to be rax. */ | |
843 | ||
844 | if (offset < 3 || (offset + 4) > sec->size) | |
845 | return FALSE; | |
846 | ||
847 | val = bfd_get_8 (abfd, contents + offset - 3); | |
848 | if ((val & 0xfb) != 0x48) | |
849 | return FALSE; | |
850 | ||
851 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
852 | return FALSE; | |
853 | ||
854 | val = bfd_get_8 (abfd, contents + offset - 1); | |
855 | return (val & 0xc7) == 0x05; | |
856 | ||
857 | case R_X86_64_TLSDESC_CALL: | |
858 | /* Check transition from GDesc access model: | |
859 | call *x@tlsdesc(%rax) | |
860 | */ | |
861 | if (offset + 2 <= sec->size) | |
862 | { | |
863 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
864 | static x86_64_opcode16 call = { { 0xff, 0x10 } }; | |
865 | return bfd_get_16 (abfd, contents + offset) == call.i; | |
866 | } | |
867 | ||
868 | return FALSE; | |
869 | ||
870 | default: | |
871 | abort (); | |
872 | } | |
873 | } | |
874 | ||
875 | /* Return TRUE if the TLS access transition is OK or no transition | |
876 | will be performed. Update R_TYPE if there is a transition. */ | |
877 | ||
878 | static bfd_boolean | |
879 | elf64_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, | |
880 | asection *sec, bfd_byte *contents, | |
881 | Elf_Internal_Shdr *symtab_hdr, | |
882 | struct elf_link_hash_entry **sym_hashes, | |
883 | unsigned int *r_type, int tls_type, | |
884 | const Elf_Internal_Rela *rel, | |
885 | const Elf_Internal_Rela *relend, | |
886 | struct elf_link_hash_entry *h) | |
887 | { | |
888 | unsigned int from_type = *r_type; | |
889 | unsigned int to_type = from_type; | |
890 | bfd_boolean check = TRUE; | |
891 | ||
892 | switch (from_type) | |
bffbf940 JJ |
893 | { |
894 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
895 | case R_X86_64_GOTPC32_TLSDESC: |
896 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 897 | case R_X86_64_GOTTPOFF: |
142411ca L |
898 | if (!info->shared) |
899 | { | |
900 | if (h == NULL) | |
901 | to_type = R_X86_64_TPOFF32; | |
902 | else | |
903 | to_type = R_X86_64_GOTTPOFF; | |
904 | } | |
905 | ||
906 | /* When we are called from elf64_x86_64_relocate_section, | |
907 | CONTENTS isn't NULL and there may be additional transitions | |
908 | based on TLS_TYPE. */ | |
909 | if (contents != NULL) | |
910 | { | |
911 | unsigned int new_to_type = to_type; | |
912 | ||
913 | if (!info->shared | |
914 | && h != NULL | |
915 | && h->dynindx == -1 | |
916 | && tls_type == GOT_TLS_IE) | |
917 | new_to_type = R_X86_64_TPOFF32; | |
918 | ||
919 | if (to_type == R_X86_64_TLSGD | |
920 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
921 | || to_type == R_X86_64_TLSDESC_CALL) | |
922 | { | |
923 | if (tls_type == GOT_TLS_IE) | |
924 | new_to_type = R_X86_64_GOTTPOFF; | |
925 | } | |
926 | ||
927 | /* We checked the transition before when we were called from | |
928 | elf64_x86_64_check_relocs. We only want to check the new | |
929 | transition which hasn't been checked before. */ | |
930 | check = new_to_type != to_type && from_type == to_type; | |
931 | to_type = new_to_type; | |
932 | } | |
933 | ||
934 | break; | |
935 | ||
bffbf940 | 936 | case R_X86_64_TLSLD: |
142411ca L |
937 | if (!info->shared) |
938 | to_type = R_X86_64_TPOFF32; | |
939 | break; | |
940 | ||
941 | default: | |
942 | return TRUE; | |
bffbf940 JJ |
943 | } |
944 | ||
142411ca L |
945 | /* Return TRUE if there is no transition. */ |
946 | if (from_type == to_type) | |
947 | return TRUE; | |
948 | ||
949 | /* Check if the transition can be performed. */ | |
950 | if (check | |
951 | && ! elf64_x86_64_check_tls_transition (abfd, sec, contents, | |
952 | symtab_hdr, sym_hashes, | |
953 | from_type, rel, relend)) | |
954 | { | |
2f629d23 | 955 | reloc_howto_type *from, *to; |
142411ca L |
956 | |
957 | from = elf64_x86_64_rtype_to_howto (abfd, from_type); | |
958 | to = elf64_x86_64_rtype_to_howto (abfd, to_type); | |
959 | ||
960 | (*_bfd_error_handler) | |
961 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
962 | "in section `%A' failed"), | |
963 | abfd, sec, from->name, to->name, | |
964 | h ? h->root.root.string : "a local symbol", | |
965 | (unsigned long) rel->r_offset); | |
966 | bfd_set_error (bfd_error_bad_value); | |
967 | return FALSE; | |
968 | } | |
969 | ||
970 | *r_type = to_type; | |
971 | return TRUE; | |
bffbf940 JJ |
972 | } |
973 | ||
70256ad8 | 974 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
975 | calculate needed space in the global offset table, procedure |
976 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 977 | |
b34976b6 | 978 | static bfd_boolean |
142411ca L |
979 | elf64_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
980 | asection *sec, | |
27482721 | 981 | const Elf_Internal_Rela *relocs) |
70256ad8 | 982 | { |
c434dee6 | 983 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
984 | Elf_Internal_Shdr *symtab_hdr; |
985 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
986 | const Elf_Internal_Rela *rel; |
987 | const Elf_Internal_Rela *rel_end; | |
70256ad8 AJ |
988 | asection *sreloc; |
989 | ||
1049f94e | 990 | if (info->relocatable) |
b34976b6 | 991 | return TRUE; |
70256ad8 | 992 | |
c434dee6 | 993 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
994 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
995 | sym_hashes = elf_sym_hashes (abfd); | |
70256ad8 | 996 | |
c434dee6 AJ |
997 | sreloc = NULL; |
998 | ||
70256ad8 AJ |
999 | rel_end = relocs + sec->reloc_count; |
1000 | for (rel = relocs; rel < rel_end; rel++) | |
1001 | { | |
bffbf940 | 1002 | unsigned int r_type; |
70256ad8 AJ |
1003 | unsigned long r_symndx; |
1004 | struct elf_link_hash_entry *h; | |
1005 | ||
1006 | r_symndx = ELF64_R_SYM (rel->r_info); | |
bffbf940 | 1007 | r_type = ELF64_R_TYPE (rel->r_info); |
c434dee6 AJ |
1008 | |
1009 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1010 | { | |
d003868e AM |
1011 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1012 | abfd, r_symndx); | |
b34976b6 | 1013 | return FALSE; |
c434dee6 AJ |
1014 | } |
1015 | ||
70256ad8 AJ |
1016 | if (r_symndx < symtab_hdr->sh_info) |
1017 | h = NULL; | |
1018 | else | |
71cb9464 L |
1019 | { |
1020 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1021 | while (h->root.type == bfd_link_hash_indirect | |
1022 | || h->root.type == bfd_link_hash_warning) | |
1023 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1024 | } | |
70256ad8 | 1025 | |
142411ca L |
1026 | if (! elf64_x86_64_tls_transition (info, abfd, sec, NULL, |
1027 | symtab_hdr, sym_hashes, | |
1028 | &r_type, GOT_UNKNOWN, | |
1029 | rel, rel_end, h)) | |
1030 | return FALSE; | |
1031 | ||
bffbf940 | 1032 | switch (r_type) |
70256ad8 | 1033 | { |
bffbf940 JJ |
1034 | case R_X86_64_TLSLD: |
1035 | htab->tls_ld_got.refcount += 1; | |
1036 | goto create_got; | |
1037 | ||
1038 | case R_X86_64_TPOFF32: | |
1039 | if (info->shared) | |
70256ad8 | 1040 | { |
bffbf940 | 1041 | (*_bfd_error_handler) |
d003868e AM |
1042 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
1043 | abfd, | |
6610a52d L |
1044 | x86_64_elf_howto_table[r_type].name, |
1045 | (h) ? h->root.root.string : "a local symbol"); | |
bffbf940 | 1046 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 1047 | return FALSE; |
70256ad8 | 1048 | } |
bffbf940 | 1049 | break; |
c434dee6 | 1050 | |
bffbf940 JJ |
1051 | case R_X86_64_GOTTPOFF: |
1052 | if (info->shared) | |
1053 | info->flags |= DF_STATIC_TLS; | |
1054 | /* Fall through */ | |
70256ad8 | 1055 | |
bffbf940 JJ |
1056 | case R_X86_64_GOT32: |
1057 | case R_X86_64_GOTPCREL: | |
1058 | case R_X86_64_TLSGD: | |
7b81dfbb AJ |
1059 | case R_X86_64_GOT64: |
1060 | case R_X86_64_GOTPCREL64: | |
1061 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
1062 | case R_X86_64_GOTPC32_TLSDESC: |
1063 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
1064 | /* This symbol requires a global offset table entry. */ |
1065 | { | |
1066 | int tls_type, old_tls_type; | |
1067 | ||
1068 | switch (r_type) | |
1069 | { | |
1070 | default: tls_type = GOT_NORMAL; break; | |
1071 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
1072 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
1073 | case R_X86_64_GOTPC32_TLSDESC: |
1074 | case R_X86_64_TLSDESC_CALL: | |
1075 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
1076 | } |
1077 | ||
1078 | if (h != NULL) | |
1079 | { | |
7b81dfbb AJ |
1080 | if (r_type == R_X86_64_GOTPLT64) |
1081 | { | |
1082 | /* This relocation indicates that we also need | |
1083 | a PLT entry, as this is a function. We don't need | |
1084 | a PLT entry for local symbols. */ | |
1085 | h->needs_plt = 1; | |
1086 | h->plt.refcount += 1; | |
1087 | } | |
bffbf940 JJ |
1088 | h->got.refcount += 1; |
1089 | old_tls_type = elf64_x86_64_hash_entry (h)->tls_type; | |
1090 | } | |
1091 | else | |
1092 | { | |
1093 | bfd_signed_vma *local_got_refcounts; | |
1094 | ||
1095 | /* This is a global offset table entry for a local symbol. */ | |
1096 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1097 | if (local_got_refcounts == NULL) | |
1098 | { | |
1099 | bfd_size_type size; | |
1100 | ||
1101 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1102 | size *= sizeof (bfd_signed_vma) |
1103 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
1104 | local_got_refcounts = ((bfd_signed_vma *) |
1105 | bfd_zalloc (abfd, size)); | |
1106 | if (local_got_refcounts == NULL) | |
b34976b6 | 1107 | return FALSE; |
bffbf940 | 1108 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
67a4f2b7 AO |
1109 | elf64_x86_64_local_tlsdesc_gotent (abfd) |
1110 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); | |
bffbf940 | 1111 | elf64_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 1112 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
1113 | } |
1114 | local_got_refcounts[r_symndx] += 1; | |
1115 | old_tls_type | |
1116 | = elf64_x86_64_local_got_tls_type (abfd) [r_symndx]; | |
1117 | } | |
1118 | ||
1119 | /* If a TLS symbol is accessed using IE at least once, | |
1120 | there is no point to use dynamic model for it. */ | |
1121 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
1122 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
1123 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 1124 | { |
67a4f2b7 | 1125 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 1126 | tls_type = old_tls_type; |
67a4f2b7 AO |
1127 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1128 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1129 | tls_type |= old_tls_type; | |
bffbf940 JJ |
1130 | else |
1131 | { | |
1132 | (*_bfd_error_handler) | |
d003868e AM |
1133 | (_("%B: %s' accessed both as normal and thread local symbol"), |
1134 | abfd, h ? h->root.root.string : "<local>"); | |
b34976b6 | 1135 | return FALSE; |
bffbf940 JJ |
1136 | } |
1137 | } | |
1138 | ||
1139 | if (old_tls_type != tls_type) | |
1140 | { | |
1141 | if (h != NULL) | |
1142 | elf64_x86_64_hash_entry (h)->tls_type = tls_type; | |
1143 | else | |
1144 | elf64_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1145 | } | |
1146 | } | |
c434dee6 AJ |
1147 | /* Fall through */ |
1148 | ||
d6ab8113 JB |
1149 | case R_X86_64_GOTOFF64: |
1150 | case R_X86_64_GOTPC32: | |
7b81dfbb | 1151 | case R_X86_64_GOTPC64: |
bffbf940 | 1152 | create_got: |
c434dee6 AJ |
1153 | if (htab->sgot == NULL) |
1154 | { | |
1155 | if (htab->elf.dynobj == NULL) | |
1156 | htab->elf.dynobj = abfd; | |
1157 | if (!create_got_section (htab->elf.dynobj, info)) | |
b34976b6 | 1158 | return FALSE; |
c434dee6 | 1159 | } |
70256ad8 AJ |
1160 | break; |
1161 | ||
1162 | case R_X86_64_PLT32: | |
1163 | /* This symbol requires a procedure linkage table entry. We | |
407443a3 AJ |
1164 | actually build the entry in adjust_dynamic_symbol, |
1165 | because this might be a case of linking PIC code which is | |
1166 | never referenced by a dynamic object, in which case we | |
1167 | don't need to generate a procedure linkage table entry | |
1168 | after all. */ | |
70256ad8 AJ |
1169 | |
1170 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 1171 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
1172 | if (h == NULL) |
1173 | continue; | |
1174 | ||
f5385ebf | 1175 | h->needs_plt = 1; |
51b64d56 | 1176 | h->plt.refcount += 1; |
70256ad8 AJ |
1177 | break; |
1178 | ||
7b81dfbb AJ |
1179 | case R_X86_64_PLTOFF64: |
1180 | /* This tries to form the 'address' of a function relative | |
1181 | to GOT. For global symbols we need a PLT entry. */ | |
1182 | if (h != NULL) | |
1183 | { | |
1184 | h->needs_plt = 1; | |
1185 | h->plt.refcount += 1; | |
1186 | } | |
1187 | goto create_got; | |
1188 | ||
cc78d0af AJ |
1189 | case R_X86_64_8: |
1190 | case R_X86_64_16: | |
70256ad8 AJ |
1191 | case R_X86_64_32: |
1192 | case R_X86_64_32S: | |
1b71fb54 AJ |
1193 | /* Let's help debug shared library creation. These relocs |
1194 | cannot be used in shared libs. Don't error out for | |
1195 | sections we don't care about, such as debug sections or | |
1196 | non-constant sections. */ | |
1197 | if (info->shared | |
1198 | && (sec->flags & SEC_ALLOC) != 0 | |
1199 | && (sec->flags & SEC_READONLY) != 0) | |
1200 | { | |
1201 | (*_bfd_error_handler) | |
d003868e AM |
1202 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
1203 | abfd, | |
6610a52d L |
1204 | x86_64_elf_howto_table[r_type].name, |
1205 | (h) ? h->root.root.string : "a local symbol"); | |
1b71fb54 | 1206 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 1207 | return FALSE; |
1b71fb54 AJ |
1208 | } |
1209 | /* Fall through. */ | |
1210 | ||
c434dee6 AJ |
1211 | case R_X86_64_PC8: |
1212 | case R_X86_64_PC16: | |
70256ad8 | 1213 | case R_X86_64_PC32: |
d6ab8113 | 1214 | case R_X86_64_PC64: |
1b71fb54 | 1215 | case R_X86_64_64: |
c434dee6 AJ |
1216 | if (h != NULL && !info->shared) |
1217 | { | |
1218 | /* If this reloc is in a read-only section, we might | |
1219 | need a copy reloc. We can't check reliably at this | |
1220 | stage whether the section is read-only, as input | |
1221 | sections have not yet been mapped to output sections. | |
1222 | Tentatively set the flag for now, and correct in | |
1223 | adjust_dynamic_symbol. */ | |
f5385ebf | 1224 | h->non_got_ref = 1; |
c434dee6 AJ |
1225 | |
1226 | /* We may need a .plt entry if the function this reloc | |
1227 | refers to is in a shared lib. */ | |
1228 | h->plt.refcount += 1; | |
d6ab8113 | 1229 | if (r_type != R_X86_64_PC32 && r_type != R_X86_64_PC64) |
f5385ebf | 1230 | h->pointer_equality_needed = 1; |
c434dee6 | 1231 | } |
70256ad8 AJ |
1232 | |
1233 | /* If we are creating a shared library, and this is a reloc | |
1234 | against a global symbol, or a non PC relative reloc | |
1235 | against a local symbol, then we need to copy the reloc | |
1236 | into the shared library. However, if we are linking with | |
1237 | -Bsymbolic, we do not need to copy a reloc against a | |
1238 | global symbol which is defined in an object we are | |
407443a3 | 1239 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
1240 | this point we have not seen all the input files, so it is |
1241 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
1242 | later (it is never cleared). In case of a weak definition, |
1243 | DEF_REGULAR may be cleared later by a strong definition in | |
1244 | a shared library. We account for that possibility below by | |
1245 | storing information in the relocs_copied field of the hash | |
1246 | table entry. A similar situation occurs when creating | |
1247 | shared libraries and symbol visibility changes render the | |
1248 | symbol local. | |
1249 | ||
1250 | If on the other hand, we are creating an executable, we | |
1251 | may need to keep relocations for symbols satisfied by a | |
1252 | dynamic library if we manage to avoid copy relocs for the | |
1253 | symbol. */ | |
1254 | if ((info->shared | |
1255 | && (sec->flags & SEC_ALLOC) != 0 | |
bffbf940 JJ |
1256 | && (((r_type != R_X86_64_PC8) |
1257 | && (r_type != R_X86_64_PC16) | |
d6ab8113 JB |
1258 | && (r_type != R_X86_64_PC32) |
1259 | && (r_type != R_X86_64_PC64)) | |
c434dee6 | 1260 | || (h != NULL |
55255dae | 1261 | && (! SYMBOLIC_BIND (info, h) |
c434dee6 | 1262 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1263 | || !h->def_regular)))) |
d40d037c AJ |
1264 | || (ELIMINATE_COPY_RELOCS |
1265 | && !info->shared | |
c434dee6 AJ |
1266 | && (sec->flags & SEC_ALLOC) != 0 |
1267 | && h != NULL | |
1268 | && (h->root.type == bfd_link_hash_defweak | |
f5385ebf | 1269 | || !h->def_regular))) |
70256ad8 | 1270 | { |
c434dee6 AJ |
1271 | struct elf64_x86_64_dyn_relocs *p; |
1272 | struct elf64_x86_64_dyn_relocs **head; | |
1273 | ||
1274 | /* We must copy these reloc types into the output file. | |
1275 | Create a reloc section in dynobj and make room for | |
1276 | this reloc. */ | |
70256ad8 AJ |
1277 | if (sreloc == NULL) |
1278 | { | |
1279 | const char *name; | |
c434dee6 | 1280 | bfd *dynobj; |
70256ad8 AJ |
1281 | |
1282 | name = (bfd_elf_string_from_elf_section | |
1283 | (abfd, | |
1284 | elf_elfheader (abfd)->e_shstrndx, | |
1285 | elf_section_data (sec)->rel_hdr.sh_name)); | |
1286 | if (name == NULL) | |
b34976b6 | 1287 | return FALSE; |
70256ad8 | 1288 | |
0112cd26 | 1289 | if (! CONST_STRNEQ (name, ".rela") |
c434dee6 AJ |
1290 | || strcmp (bfd_get_section_name (abfd, sec), |
1291 | name + 5) != 0) | |
1292 | { | |
1293 | (*_bfd_error_handler) | |
d003868e AM |
1294 | (_("%B: bad relocation section name `%s\'"), |
1295 | abfd, name); | |
c434dee6 AJ |
1296 | } |
1297 | ||
1298 | if (htab->elf.dynobj == NULL) | |
1299 | htab->elf.dynobj = abfd; | |
1300 | ||
1301 | dynobj = htab->elf.dynobj; | |
70256ad8 AJ |
1302 | |
1303 | sreloc = bfd_get_section_by_name (dynobj, name); | |
1304 | if (sreloc == NULL) | |
1305 | { | |
1306 | flagword flags; | |
1307 | ||
70256ad8 AJ |
1308 | flags = (SEC_HAS_CONTENTS | SEC_READONLY |
1309 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
1310 | if ((sec->flags & SEC_ALLOC) != 0) | |
1311 | flags |= SEC_ALLOC | SEC_LOAD; | |
3496cb2a L |
1312 | sreloc = bfd_make_section_with_flags (dynobj, |
1313 | name, | |
1314 | flags); | |
70256ad8 | 1315 | if (sreloc == NULL |
cc78d0af | 1316 | || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
b34976b6 | 1317 | return FALSE; |
70256ad8 | 1318 | } |
c434dee6 | 1319 | elf_section_data (sec)->sreloc = sreloc; |
70256ad8 AJ |
1320 | } |
1321 | ||
c434dee6 AJ |
1322 | /* If this is a global symbol, we count the number of |
1323 | relocations we need for this symbol. */ | |
1324 | if (h != NULL) | |
70256ad8 | 1325 | { |
c434dee6 AJ |
1326 | head = &((struct elf64_x86_64_link_hash_entry *) h)->dyn_relocs; |
1327 | } | |
1328 | else | |
1329 | { | |
e81d3500 | 1330 | void **vpp; |
c434dee6 AJ |
1331 | /* Track dynamic relocs needed for local syms too. |
1332 | We really need local syms available to do this | |
1333 | easily. Oh well. */ | |
1334 | ||
1335 | asection *s; | |
1336 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
1337 | sec, r_symndx); | |
1338 | if (s == NULL) | |
b34976b6 | 1339 | return FALSE; |
70256ad8 | 1340 | |
e81d3500 DD |
1341 | /* Beware of type punned pointers vs strict aliasing |
1342 | rules. */ | |
1343 | vpp = &(elf_section_data (s)->local_dynrel); | |
1344 | head = (struct elf64_x86_64_dyn_relocs **)vpp; | |
c434dee6 | 1345 | } |
70256ad8 | 1346 | |
c434dee6 AJ |
1347 | p = *head; |
1348 | if (p == NULL || p->sec != sec) | |
1349 | { | |
1350 | bfd_size_type amt = sizeof *p; | |
1351 | p = ((struct elf64_x86_64_dyn_relocs *) | |
1352 | bfd_alloc (htab->elf.dynobj, amt)); | |
70256ad8 | 1353 | if (p == NULL) |
b34976b6 | 1354 | return FALSE; |
c434dee6 AJ |
1355 | p->next = *head; |
1356 | *head = p; | |
1357 | p->sec = sec; | |
1358 | p->count = 0; | |
1359 | p->pc_count = 0; | |
70256ad8 | 1360 | } |
c434dee6 AJ |
1361 | |
1362 | p->count += 1; | |
bffbf940 JJ |
1363 | if (r_type == R_X86_64_PC8 |
1364 | || r_type == R_X86_64_PC16 | |
d6ab8113 JB |
1365 | || r_type == R_X86_64_PC32 |
1366 | || r_type == R_X86_64_PC64) | |
c434dee6 | 1367 | p->pc_count += 1; |
70256ad8 AJ |
1368 | } |
1369 | break; | |
fe4770f4 AJ |
1370 | |
1371 | /* This relocation describes the C++ object vtable hierarchy. | |
1372 | Reconstruct it for later use during GC. */ | |
1373 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 1374 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 1375 | return FALSE; |
fe4770f4 AJ |
1376 | break; |
1377 | ||
1378 | /* This relocation describes which C++ vtable entries are actually | |
1379 | used. Record for later use during GC. */ | |
1380 | case R_X86_64_GNU_VTENTRY: | |
c152c796 | 1381 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
b34976b6 | 1382 | return FALSE; |
fe4770f4 | 1383 | break; |
c434dee6 AJ |
1384 | |
1385 | default: | |
1386 | break; | |
70256ad8 AJ |
1387 | } |
1388 | } | |
1389 | ||
b34976b6 | 1390 | return TRUE; |
70256ad8 AJ |
1391 | } |
1392 | ||
1393 | /* Return the section that should be marked against GC for a given | |
407443a3 | 1394 | relocation. */ |
70256ad8 AJ |
1395 | |
1396 | static asection * | |
27482721 | 1397 | elf64_x86_64_gc_mark_hook (asection *sec, |
07adf181 | 1398 | struct bfd_link_info *info, |
27482721 AJ |
1399 | Elf_Internal_Rela *rel, |
1400 | struct elf_link_hash_entry *h, | |
1401 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
1402 | { |
1403 | if (h != NULL) | |
07adf181 AM |
1404 | switch (ELF64_R_TYPE (rel->r_info)) |
1405 | { | |
1406 | case R_X86_64_GNU_VTINHERIT: | |
1407 | case R_X86_64_GNU_VTENTRY: | |
1408 | return NULL; | |
1409 | } | |
1410 | ||
1411 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
1412 | } |
1413 | ||
407443a3 | 1414 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 | 1415 | |
b34976b6 | 1416 | static bfd_boolean |
27482721 | 1417 | elf64_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, |
142411ca L |
1418 | asection *sec, |
1419 | const Elf_Internal_Rela *relocs) | |
70256ad8 AJ |
1420 | { |
1421 | Elf_Internal_Shdr *symtab_hdr; | |
1422 | struct elf_link_hash_entry **sym_hashes; | |
1423 | bfd_signed_vma *local_got_refcounts; | |
1424 | const Elf_Internal_Rela *rel, *relend; | |
c434dee6 AJ |
1425 | |
1426 | elf_section_data (sec)->local_dynrel = NULL; | |
70256ad8 AJ |
1427 | |
1428 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1429 | sym_hashes = elf_sym_hashes (abfd); | |
1430 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1431 | ||
70256ad8 AJ |
1432 | relend = relocs + sec->reloc_count; |
1433 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
1434 | { |
1435 | unsigned long r_symndx; | |
1436 | unsigned int r_type; | |
1437 | struct elf_link_hash_entry *h = NULL; | |
70256ad8 | 1438 | |
26e41594 AM |
1439 | r_symndx = ELF64_R_SYM (rel->r_info); |
1440 | if (r_symndx >= symtab_hdr->sh_info) | |
1441 | { | |
1442 | struct elf64_x86_64_link_hash_entry *eh; | |
1443 | struct elf64_x86_64_dyn_relocs **pp; | |
1444 | struct elf64_x86_64_dyn_relocs *p; | |
c434dee6 | 1445 | |
26e41594 | 1446 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1447 | while (h->root.type == bfd_link_hash_indirect |
1448 | || h->root.type == bfd_link_hash_warning) | |
1449 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1450 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
c434dee6 | 1451 | |
26e41594 AM |
1452 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1453 | if (p->sec == sec) | |
1454 | { | |
1455 | /* Everything must go for SEC. */ | |
1456 | *pp = p->next; | |
1457 | break; | |
1458 | } | |
1459 | } | |
c434dee6 | 1460 | |
26e41594 | 1461 | r_type = ELF64_R_TYPE (rel->r_info); |
142411ca L |
1462 | if (! elf64_x86_64_tls_transition (info, abfd, sec, NULL, |
1463 | symtab_hdr, sym_hashes, | |
1464 | &r_type, GOT_UNKNOWN, | |
1465 | rel, relend, h)) | |
1466 | return FALSE; | |
1467 | ||
26e41594 AM |
1468 | switch (r_type) |
1469 | { | |
1470 | case R_X86_64_TLSLD: | |
1471 | if (elf64_x86_64_hash_table (info)->tls_ld_got.refcount > 0) | |
1472 | elf64_x86_64_hash_table (info)->tls_ld_got.refcount -= 1; | |
1473 | break; | |
c434dee6 | 1474 | |
26e41594 | 1475 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
1476 | case R_X86_64_GOTPC32_TLSDESC: |
1477 | case R_X86_64_TLSDESC_CALL: | |
26e41594 AM |
1478 | case R_X86_64_GOTTPOFF: |
1479 | case R_X86_64_GOT32: | |
1480 | case R_X86_64_GOTPCREL: | |
7b81dfbb AJ |
1481 | case R_X86_64_GOT64: |
1482 | case R_X86_64_GOTPCREL64: | |
1483 | case R_X86_64_GOTPLT64: | |
26e41594 AM |
1484 | if (h != NULL) |
1485 | { | |
7b81dfbb AJ |
1486 | if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0) |
1487 | h->plt.refcount -= 1; | |
26e41594 AM |
1488 | if (h->got.refcount > 0) |
1489 | h->got.refcount -= 1; | |
1490 | } | |
1491 | else if (local_got_refcounts != NULL) | |
1492 | { | |
1493 | if (local_got_refcounts[r_symndx] > 0) | |
1494 | local_got_refcounts[r_symndx] -= 1; | |
1495 | } | |
1496 | break; | |
c434dee6 | 1497 | |
26e41594 AM |
1498 | case R_X86_64_8: |
1499 | case R_X86_64_16: | |
1500 | case R_X86_64_32: | |
1501 | case R_X86_64_64: | |
1502 | case R_X86_64_32S: | |
1503 | case R_X86_64_PC8: | |
1504 | case R_X86_64_PC16: | |
1505 | case R_X86_64_PC32: | |
d6ab8113 | 1506 | case R_X86_64_PC64: |
26e41594 AM |
1507 | if (info->shared) |
1508 | break; | |
1509 | /* Fall thru */ | |
c434dee6 | 1510 | |
26e41594 | 1511 | case R_X86_64_PLT32: |
7b81dfbb | 1512 | case R_X86_64_PLTOFF64: |
26e41594 AM |
1513 | if (h != NULL) |
1514 | { | |
1515 | if (h->plt.refcount > 0) | |
1516 | h->plt.refcount -= 1; | |
1517 | } | |
1518 | break; | |
70256ad8 | 1519 | |
26e41594 AM |
1520 | default: |
1521 | break; | |
1522 | } | |
1523 | } | |
70256ad8 | 1524 | |
b34976b6 | 1525 | return TRUE; |
70256ad8 AJ |
1526 | } |
1527 | ||
1528 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1529 | regular object. The current definition is in some section of the | |
1530 | dynamic object, but we're not including those sections. We have to | |
1531 | change the definition to something the rest of the link can | |
407443a3 | 1532 | understand. */ |
70256ad8 | 1533 | |
b34976b6 | 1534 | static bfd_boolean |
27482721 AJ |
1535 | elf64_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
1536 | struct elf_link_hash_entry *h) | |
70256ad8 | 1537 | { |
c434dee6 | 1538 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 | 1539 | asection *s; |
70256ad8 | 1540 | |
70256ad8 AJ |
1541 | /* If this is a function, put it in the procedure linkage table. We |
1542 | will fill in the contents of the procedure linkage table later, | |
1543 | when we know the address of the .got section. */ | |
1544 | if (h->type == STT_FUNC | |
f5385ebf | 1545 | || h->needs_plt) |
70256ad8 | 1546 | { |
c434dee6 | 1547 | if (h->plt.refcount <= 0 |
27482721 AJ |
1548 | || SYMBOL_CALLS_LOCAL (info, h) |
1549 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1550 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 1551 | { |
70256ad8 AJ |
1552 | /* This case can occur if we saw a PLT32 reloc in an input |
1553 | file, but the symbol was never referred to by a dynamic | |
1554 | object, or if all references were garbage collected. In | |
1555 | such a case, we don't actually need to build a procedure | |
1556 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 1557 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 1558 | h->needs_plt = 0; |
70256ad8 AJ |
1559 | } |
1560 | ||
b34976b6 | 1561 | return TRUE; |
70256ad8 | 1562 | } |
bbd7ec4a | 1563 | else |
c434dee6 AJ |
1564 | /* It's possible that we incorrectly decided a .plt reloc was |
1565 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
1566 | check_relocs. We can't decide accurately between function and | |
1567 | non-function syms in check-relocs; Objects loaded later in | |
1568 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1569 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
1570 | |
1571 | /* If this is a weak symbol, and there is a real definition, the | |
1572 | processor independent code will have arranged for us to see the | |
407443a3 | 1573 | real definition first, and we can just use the same value. */ |
f6e332e6 | 1574 | if (h->u.weakdef != NULL) |
70256ad8 | 1575 | { |
f6e332e6 AM |
1576 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1577 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1578 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1579 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 1580 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 1581 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 1582 | return TRUE; |
70256ad8 AJ |
1583 | } |
1584 | ||
1585 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 1586 | is not a function. */ |
70256ad8 AJ |
1587 | |
1588 | /* If we are creating a shared library, we must presume that the | |
1589 | only references to the symbol are via the global offset table. | |
1590 | For such cases we need not do anything here; the relocations will | |
407443a3 | 1591 | be handled correctly by relocate_section. */ |
70256ad8 | 1592 | if (info->shared) |
b34976b6 | 1593 | return TRUE; |
70256ad8 AJ |
1594 | |
1595 | /* If there are no references to this symbol that do not use the | |
1596 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 1597 | if (!h->non_got_ref) |
b34976b6 | 1598 | return TRUE; |
70256ad8 | 1599 | |
c434dee6 AJ |
1600 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1601 | if (info->nocopyreloc) | |
1602 | { | |
f5385ebf | 1603 | h->non_got_ref = 0; |
b34976b6 | 1604 | return TRUE; |
c434dee6 AJ |
1605 | } |
1606 | ||
d40d037c | 1607 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 1608 | { |
d40d037c AJ |
1609 | struct elf64_x86_64_link_hash_entry * eh; |
1610 | struct elf64_x86_64_dyn_relocs *p; | |
c434dee6 | 1611 | |
d40d037c AJ |
1612 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
1613 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1614 | { | |
1615 | s = p->sec->output_section; | |
1616 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1617 | break; | |
1618 | } | |
1619 | ||
1620 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1621 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1622 | if (p == NULL) | |
1623 | { | |
f5385ebf | 1624 | h->non_got_ref = 0; |
d40d037c AJ |
1625 | return TRUE; |
1626 | } | |
c434dee6 AJ |
1627 | } |
1628 | ||
909272ee AM |
1629 | if (h->size == 0) |
1630 | { | |
1631 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), | |
1632 | h->root.root.string); | |
1633 | return TRUE; | |
1634 | } | |
1635 | ||
70256ad8 | 1636 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 1637 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
1638 | an entry for this symbol in the .dynsym section. The dynamic |
1639 | object will contain position independent code, so all references | |
1640 | from the dynamic object to this symbol will go through the global | |
1641 | offset table. The dynamic linker will use the .dynsym entry to | |
1642 | determine the address it must put in the global offset table, so | |
1643 | both the dynamic object and the regular object will refer to the | |
1644 | same memory location for the variable. */ | |
1645 | ||
c434dee6 | 1646 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
1647 | |
1648 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
1649 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 1650 | runtime process image. */ |
70256ad8 AJ |
1651 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1652 | { | |
eea6121a | 1653 | htab->srelbss->size += sizeof (Elf64_External_Rela); |
f5385ebf | 1654 | h->needs_copy = 1; |
70256ad8 AJ |
1655 | } |
1656 | ||
c434dee6 | 1657 | s = htab->sdynbss; |
70256ad8 | 1658 | |
027297b7 | 1659 | return _bfd_elf_adjust_dynamic_copy (h, s); |
70256ad8 AJ |
1660 | } |
1661 | ||
c434dee6 AJ |
1662 | /* Allocate space in .plt, .got and associated reloc sections for |
1663 | dynamic relocs. */ | |
1664 | ||
b34976b6 | 1665 | static bfd_boolean |
27482721 | 1666 | allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
1667 | { |
1668 | struct bfd_link_info *info; | |
1669 | struct elf64_x86_64_link_hash_table *htab; | |
1670 | struct elf64_x86_64_link_hash_entry *eh; | |
1671 | struct elf64_x86_64_dyn_relocs *p; | |
1672 | ||
e92d460e | 1673 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1674 | return TRUE; |
c434dee6 | 1675 | |
e92d460e AM |
1676 | if (h->root.type == bfd_link_hash_warning) |
1677 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1678 | ||
c434dee6 AJ |
1679 | info = (struct bfd_link_info *) inf; |
1680 | htab = elf64_x86_64_hash_table (info); | |
1681 | ||
1682 | if (htab->elf.dynamic_sections_created | |
27482721 | 1683 | && h->plt.refcount > 0) |
c434dee6 AJ |
1684 | { |
1685 | /* Make sure this symbol is output as a dynamic symbol. | |
1686 | Undefined weak syms won't yet be marked as dynamic. */ | |
1687 | if (h->dynindx == -1 | |
f5385ebf | 1688 | && !h->forced_local) |
c434dee6 | 1689 | { |
c152c796 | 1690 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1691 | return FALSE; |
c434dee6 AJ |
1692 | } |
1693 | ||
27482721 AJ |
1694 | if (info->shared |
1695 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
c434dee6 AJ |
1696 | { |
1697 | asection *s = htab->splt; | |
1698 | ||
1699 | /* If this is the first .plt entry, make room for the special | |
1700 | first entry. */ | |
eea6121a AM |
1701 | if (s->size == 0) |
1702 | s->size += PLT_ENTRY_SIZE; | |
c434dee6 | 1703 | |
eea6121a | 1704 | h->plt.offset = s->size; |
c434dee6 AJ |
1705 | |
1706 | /* If this symbol is not defined in a regular file, and we are | |
1707 | not generating a shared library, then set the symbol to this | |
1708 | location in the .plt. This is required to make function | |
1709 | pointers compare as equal between the normal executable and | |
1710 | the shared library. */ | |
1711 | if (! info->shared | |
f5385ebf | 1712 | && !h->def_regular) |
c434dee6 AJ |
1713 | { |
1714 | h->root.u.def.section = s; | |
1715 | h->root.u.def.value = h->plt.offset; | |
1716 | } | |
1717 | ||
1718 | /* Make room for this entry. */ | |
eea6121a | 1719 | s->size += PLT_ENTRY_SIZE; |
c434dee6 AJ |
1720 | |
1721 | /* We also need to make an entry in the .got.plt section, which | |
1722 | will be placed in the .got section by the linker script. */ | |
eea6121a | 1723 | htab->sgotplt->size += GOT_ENTRY_SIZE; |
c434dee6 AJ |
1724 | |
1725 | /* We also need to make an entry in the .rela.plt section. */ | |
eea6121a | 1726 | htab->srelplt->size += sizeof (Elf64_External_Rela); |
67a4f2b7 | 1727 | htab->srelplt->reloc_count++; |
c434dee6 AJ |
1728 | } |
1729 | else | |
1730 | { | |
1731 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1732 | h->needs_plt = 0; |
c434dee6 AJ |
1733 | } |
1734 | } | |
1735 | else | |
1736 | { | |
1737 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1738 | h->needs_plt = 0; |
c434dee6 AJ |
1739 | } |
1740 | ||
67a4f2b7 AO |
1741 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
1742 | eh->tlsdesc_got = (bfd_vma) -1; | |
1743 | ||
bffbf940 JJ |
1744 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
1745 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
1746 | if (h->got.refcount > 0 | |
1747 | && !info->shared | |
1748 | && h->dynindx == -1 | |
1749 | && elf64_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) | |
1750 | h->got.offset = (bfd_vma) -1; | |
1751 | else if (h->got.refcount > 0) | |
c434dee6 AJ |
1752 | { |
1753 | asection *s; | |
b34976b6 | 1754 | bfd_boolean dyn; |
bffbf940 | 1755 | int tls_type = elf64_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
1756 | |
1757 | /* Make sure this symbol is output as a dynamic symbol. | |
1758 | Undefined weak syms won't yet be marked as dynamic. */ | |
1759 | if (h->dynindx == -1 | |
f5385ebf | 1760 | && !h->forced_local) |
c434dee6 | 1761 | { |
c152c796 | 1762 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1763 | return FALSE; |
c434dee6 AJ |
1764 | } |
1765 | ||
67a4f2b7 AO |
1766 | if (GOT_TLS_GDESC_P (tls_type)) |
1767 | { | |
1768 | eh->tlsdesc_got = htab->sgotplt->size | |
1769 | - elf64_x86_64_compute_jump_table_size (htab); | |
1770 | htab->sgotplt->size += 2 * GOT_ENTRY_SIZE; | |
1771 | h->got.offset = (bfd_vma) -2; | |
1772 | } | |
1773 | if (! GOT_TLS_GDESC_P (tls_type) | |
1774 | || GOT_TLS_GD_P (tls_type)) | |
1775 | { | |
1776 | s = htab->sgot; | |
1777 | h->got.offset = s->size; | |
1778 | s->size += GOT_ENTRY_SIZE; | |
1779 | if (GOT_TLS_GD_P (tls_type)) | |
1780 | s->size += GOT_ENTRY_SIZE; | |
1781 | } | |
c434dee6 | 1782 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 JJ |
1783 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
1784 | and two if global. | |
1785 | R_X86_64_GOTTPOFF needs one dynamic relocation. */ | |
67a4f2b7 | 1786 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 1787 | || tls_type == GOT_TLS_IE) |
eea6121a | 1788 | htab->srelgot->size += sizeof (Elf64_External_Rela); |
67a4f2b7 | 1789 | else if (GOT_TLS_GD_P (tls_type)) |
eea6121a | 1790 | htab->srelgot->size += 2 * sizeof (Elf64_External_Rela); |
67a4f2b7 AO |
1791 | else if (! GOT_TLS_GDESC_P (tls_type) |
1792 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1793 | || h->root.type != bfd_link_hash_undefweak) | |
27482721 AJ |
1794 | && (info->shared |
1795 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
eea6121a | 1796 | htab->srelgot->size += sizeof (Elf64_External_Rela); |
67a4f2b7 AO |
1797 | if (GOT_TLS_GDESC_P (tls_type)) |
1798 | { | |
1799 | htab->srelplt->size += sizeof (Elf64_External_Rela); | |
1800 | htab->tlsdesc_plt = (bfd_vma) -1; | |
1801 | } | |
c434dee6 AJ |
1802 | } |
1803 | else | |
1804 | h->got.offset = (bfd_vma) -1; | |
1805 | ||
c434dee6 | 1806 | if (eh->dyn_relocs == NULL) |
b34976b6 | 1807 | return TRUE; |
c434dee6 AJ |
1808 | |
1809 | /* In the shared -Bsymbolic case, discard space allocated for | |
1810 | dynamic pc-relative relocs against symbols which turn out to be | |
1811 | defined in regular objects. For the normal shared case, discard | |
1812 | space for pc-relative relocs that have become local due to symbol | |
1813 | visibility changes. */ | |
1814 | ||
1815 | if (info->shared) | |
1816 | { | |
27482721 AJ |
1817 | /* Relocs that use pc_count are those that appear on a call |
1818 | insn, or certain REL relocs that can generated via assembly. | |
1819 | We want calls to protected symbols to resolve directly to the | |
1820 | function rather than going via the plt. If people want | |
1821 | function pointer comparisons to work as expected then they | |
1822 | should avoid writing weird assembly. */ | |
1823 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 AJ |
1824 | { |
1825 | struct elf64_x86_64_dyn_relocs **pp; | |
1826 | ||
1827 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1828 | { | |
1829 | p->count -= p->pc_count; | |
1830 | p->pc_count = 0; | |
1831 | if (p->count == 0) | |
1832 | *pp = p->next; | |
1833 | else | |
1834 | pp = &p->next; | |
1835 | } | |
1836 | } | |
4e795f50 AM |
1837 | |
1838 | /* Also discard relocs on undefined weak syms with non-default | |
1839 | visibility. */ | |
22d606e9 | 1840 | if (eh->dyn_relocs != NULL |
4e795f50 | 1841 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
1842 | { |
1843 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
1844 | eh->dyn_relocs = NULL; | |
1845 | ||
1846 | /* Make sure undefined weak symbols are output as a dynamic | |
1847 | symbol in PIEs. */ | |
1848 | else if (h->dynindx == -1 | |
1849 | && !h->forced_local) | |
1850 | { | |
1851 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
1852 | return FALSE; | |
1853 | } | |
1854 | } | |
c434dee6 | 1855 | } |
d40d037c | 1856 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
1857 | { |
1858 | /* For the non-shared case, discard space for relocs against | |
1859 | symbols which turn out to need copy relocs or are not | |
1860 | dynamic. */ | |
1861 | ||
f5385ebf AM |
1862 | if (!h->non_got_ref |
1863 | && ((h->def_dynamic | |
1864 | && !h->def_regular) | |
c434dee6 AJ |
1865 | || (htab->elf.dynamic_sections_created |
1866 | && (h->root.type == bfd_link_hash_undefweak | |
1867 | || h->root.type == bfd_link_hash_undefined)))) | |
1868 | { | |
1869 | /* Make sure this symbol is output as a dynamic symbol. | |
1870 | Undefined weak syms won't yet be marked as dynamic. */ | |
1871 | if (h->dynindx == -1 | |
f5385ebf | 1872 | && !h->forced_local) |
c434dee6 | 1873 | { |
c152c796 | 1874 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1875 | return FALSE; |
c434dee6 AJ |
1876 | } |
1877 | ||
1878 | /* If that succeeded, we know we'll be keeping all the | |
1879 | relocs. */ | |
1880 | if (h->dynindx != -1) | |
1881 | goto keep; | |
1882 | } | |
1883 | ||
1884 | eh->dyn_relocs = NULL; | |
1885 | ||
1886 | keep: ; | |
1887 | } | |
1888 | ||
1889 | /* Finally, allocate space. */ | |
1890 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1891 | { | |
1892 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
eea6121a | 1893 | sreloc->size += p->count * sizeof (Elf64_External_Rela); |
c434dee6 AJ |
1894 | } |
1895 | ||
b34976b6 | 1896 | return TRUE; |
c434dee6 AJ |
1897 | } |
1898 | ||
1899 | /* Find any dynamic relocs that apply to read-only sections. */ | |
1900 | ||
b34976b6 | 1901 | static bfd_boolean |
27482721 | 1902 | readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
1903 | { |
1904 | struct elf64_x86_64_link_hash_entry *eh; | |
1905 | struct elf64_x86_64_dyn_relocs *p; | |
1906 | ||
e92d460e AM |
1907 | if (h->root.type == bfd_link_hash_warning) |
1908 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1909 | ||
c434dee6 AJ |
1910 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
1911 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1912 | { | |
1913 | asection *s = p->sec->output_section; | |
1914 | ||
1915 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1916 | { | |
1917 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1918 | ||
1919 | info->flags |= DF_TEXTREL; | |
1920 | ||
1921 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 1922 | return FALSE; |
c434dee6 AJ |
1923 | } |
1924 | } | |
b34976b6 | 1925 | return TRUE; |
c434dee6 AJ |
1926 | } |
1927 | ||
70256ad8 AJ |
1928 | /* Set the sizes of the dynamic sections. */ |
1929 | ||
b34976b6 | 1930 | static bfd_boolean |
27482721 AJ |
1931 | elf64_x86_64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
1932 | struct bfd_link_info *info) | |
70256ad8 | 1933 | { |
c434dee6 | 1934 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1935 | bfd *dynobj; |
1936 | asection *s; | |
b34976b6 | 1937 | bfd_boolean relocs; |
c434dee6 | 1938 | bfd *ibfd; |
70256ad8 | 1939 | |
c434dee6 AJ |
1940 | htab = elf64_x86_64_hash_table (info); |
1941 | dynobj = htab->elf.dynobj; | |
1942 | if (dynobj == NULL) | |
1943 | abort (); | |
70256ad8 | 1944 | |
c434dee6 | 1945 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
1946 | { |
1947 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 1948 | if (info->executable) |
70256ad8 AJ |
1949 | { |
1950 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
c434dee6 AJ |
1951 | if (s == NULL) |
1952 | abort (); | |
eea6121a | 1953 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
70256ad8 AJ |
1954 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1955 | } | |
1956 | } | |
70256ad8 | 1957 | |
c434dee6 AJ |
1958 | /* Set up .got offsets for local syms, and space for local dynamic |
1959 | relocs. */ | |
1960 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
70256ad8 | 1961 | { |
c434dee6 AJ |
1962 | bfd_signed_vma *local_got; |
1963 | bfd_signed_vma *end_local_got; | |
bffbf940 | 1964 | char *local_tls_type; |
67a4f2b7 | 1965 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
1966 | bfd_size_type locsymcount; |
1967 | Elf_Internal_Shdr *symtab_hdr; | |
1968 | asection *srel; | |
70256ad8 | 1969 | |
c434dee6 | 1970 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
70256ad8 AJ |
1971 | continue; |
1972 | ||
c434dee6 | 1973 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 1974 | { |
c434dee6 AJ |
1975 | struct elf64_x86_64_dyn_relocs *p; |
1976 | ||
e81d3500 DD |
1977 | for (p = (struct elf64_x86_64_dyn_relocs *) |
1978 | (elf_section_data (s)->local_dynrel); | |
c434dee6 AJ |
1979 | p != NULL; |
1980 | p = p->next) | |
70256ad8 | 1981 | { |
c434dee6 AJ |
1982 | if (!bfd_is_abs_section (p->sec) |
1983 | && bfd_is_abs_section (p->sec->output_section)) | |
1984 | { | |
1985 | /* Input section has been discarded, either because | |
1986 | it is a copy of a linkonce section or due to | |
1987 | linker script /DISCARD/, so we'll be discarding | |
1988 | the relocs too. */ | |
1989 | } | |
1990 | else if (p->count != 0) | |
1991 | { | |
1992 | srel = elf_section_data (p->sec)->sreloc; | |
eea6121a | 1993 | srel->size += p->count * sizeof (Elf64_External_Rela); |
c434dee6 AJ |
1994 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
1995 | info->flags |= DF_TEXTREL; | |
1996 | ||
1997 | } | |
70256ad8 AJ |
1998 | } |
1999 | } | |
c434dee6 AJ |
2000 | |
2001 | local_got = elf_local_got_refcounts (ibfd); | |
2002 | if (!local_got) | |
2003 | continue; | |
2004 | ||
2005 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
2006 | locsymcount = symtab_hdr->sh_info; | |
2007 | end_local_got = local_got + locsymcount; | |
bffbf940 | 2008 | local_tls_type = elf64_x86_64_local_got_tls_type (ibfd); |
67a4f2b7 | 2009 | local_tlsdesc_gotent = elf64_x86_64_local_tlsdesc_gotent (ibfd); |
c434dee6 AJ |
2010 | s = htab->sgot; |
2011 | srel = htab->srelgot; | |
67a4f2b7 AO |
2012 | for (; local_got < end_local_got; |
2013 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 2014 | { |
67a4f2b7 | 2015 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 2016 | if (*local_got > 0) |
70256ad8 | 2017 | { |
67a4f2b7 AO |
2018 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
2019 | { | |
2020 | *local_tlsdesc_gotent = htab->sgotplt->size | |
2021 | - elf64_x86_64_compute_jump_table_size (htab); | |
2022 | htab->sgotplt->size += 2 * GOT_ENTRY_SIZE; | |
2023 | *local_got = (bfd_vma) -2; | |
2024 | } | |
2025 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2026 | || GOT_TLS_GD_P (*local_tls_type)) | |
2027 | { | |
2028 | *local_got = s->size; | |
2029 | s->size += GOT_ENTRY_SIZE; | |
2030 | if (GOT_TLS_GD_P (*local_tls_type)) | |
2031 | s->size += GOT_ENTRY_SIZE; | |
2032 | } | |
bffbf940 | 2033 | if (info->shared |
67a4f2b7 | 2034 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 2035 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
2036 | { |
2037 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
2038 | { | |
2039 | htab->srelplt->size += sizeof (Elf64_External_Rela); | |
2040 | htab->tlsdesc_plt = (bfd_vma) -1; | |
2041 | } | |
2042 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2043 | || GOT_TLS_GD_P (*local_tls_type)) | |
2044 | srel->size += sizeof (Elf64_External_Rela); | |
2045 | } | |
70256ad8 AJ |
2046 | } |
2047 | else | |
c434dee6 AJ |
2048 | *local_got = (bfd_vma) -1; |
2049 | } | |
2050 | } | |
70256ad8 | 2051 | |
bffbf940 JJ |
2052 | if (htab->tls_ld_got.refcount > 0) |
2053 | { | |
2054 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
2055 | relocs. */ | |
eea6121a AM |
2056 | htab->tls_ld_got.offset = htab->sgot->size; |
2057 | htab->sgot->size += 2 * GOT_ENTRY_SIZE; | |
2058 | htab->srelgot->size += sizeof (Elf64_External_Rela); | |
bffbf940 JJ |
2059 | } |
2060 | else | |
2061 | htab->tls_ld_got.offset = -1; | |
2062 | ||
c434dee6 AJ |
2063 | /* Allocate global sym .plt and .got entries, and space for global |
2064 | sym dynamic relocs. */ | |
2065 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); | |
2066 | ||
67a4f2b7 AO |
2067 | /* For every jump slot reserved in the sgotplt, reloc_count is |
2068 | incremented. However, when we reserve space for TLS descriptors, | |
2069 | it's not incremented, so in order to compute the space reserved | |
2070 | for them, it suffices to multiply the reloc count by the jump | |
2071 | slot size. */ | |
2072 | if (htab->srelplt) | |
2073 | htab->sgotplt_jump_table_size | |
2074 | = elf64_x86_64_compute_jump_table_size (htab); | |
2075 | ||
2076 | if (htab->tlsdesc_plt) | |
2077 | { | |
2078 | /* If we're not using lazy TLS relocations, don't generate the | |
2079 | PLT and GOT entries they require. */ | |
2080 | if ((info->flags & DF_BIND_NOW)) | |
2081 | htab->tlsdesc_plt = 0; | |
2082 | else | |
2083 | { | |
2084 | htab->tlsdesc_got = htab->sgot->size; | |
2085 | htab->sgot->size += GOT_ENTRY_SIZE; | |
2086 | /* Reserve room for the initial entry. | |
2087 | FIXME: we could probably do away with it in this case. */ | |
2088 | if (htab->splt->size == 0) | |
2089 | htab->splt->size += PLT_ENTRY_SIZE; | |
2090 | htab->tlsdesc_plt = htab->splt->size; | |
2091 | htab->splt->size += PLT_ENTRY_SIZE; | |
2092 | } | |
2093 | } | |
2094 | ||
c434dee6 AJ |
2095 | /* We now have determined the sizes of the various dynamic sections. |
2096 | Allocate memory for them. */ | |
b34976b6 | 2097 | relocs = FALSE; |
c434dee6 AJ |
2098 | for (s = dynobj->sections; s != NULL; s = s->next) |
2099 | { | |
2100 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2101 | continue; | |
2102 | ||
2103 | if (s == htab->splt | |
2104 | || s == htab->sgot | |
75ff4589 L |
2105 | || s == htab->sgotplt |
2106 | || s == htab->sdynbss) | |
c434dee6 AJ |
2107 | { |
2108 | /* Strip this section if we don't need it; see the | |
2109 | comment below. */ | |
2110 | } | |
0112cd26 | 2111 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 2112 | { |
eea6121a | 2113 | if (s->size != 0 && s != htab->srelplt) |
b34976b6 | 2114 | relocs = TRUE; |
c434dee6 AJ |
2115 | |
2116 | /* We use the reloc_count field as a counter if we need | |
2117 | to copy relocs into the output file. */ | |
67a4f2b7 AO |
2118 | if (s != htab->srelplt) |
2119 | s->reloc_count = 0; | |
70256ad8 | 2120 | } |
c434dee6 | 2121 | else |
70256ad8 AJ |
2122 | { |
2123 | /* It's not one of our sections, so don't allocate space. */ | |
2124 | continue; | |
2125 | } | |
2126 | ||
eea6121a | 2127 | if (s->size == 0) |
70256ad8 | 2128 | { |
c434dee6 AJ |
2129 | /* If we don't need this section, strip it from the |
2130 | output file. This is mostly to handle .rela.bss and | |
2131 | .rela.plt. We must create both sections in | |
2132 | create_dynamic_sections, because they must be created | |
2133 | before the linker maps input sections to output | |
2134 | sections. The linker does that before | |
2135 | adjust_dynamic_symbol is called, and it is that | |
2136 | function which decides whether anything needs to go | |
2137 | into these sections. */ | |
2138 | ||
8423293d | 2139 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
2140 | continue; |
2141 | } | |
2142 | ||
c456f082 AM |
2143 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
2144 | continue; | |
2145 | ||
70256ad8 AJ |
2146 | /* Allocate memory for the section contents. We use bfd_zalloc |
2147 | here in case unused entries are not reclaimed before the | |
2148 | section's contents are written out. This should not happen, | |
2149 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
2150 | of garbage. */ | |
eea6121a | 2151 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 2152 | if (s->contents == NULL) |
b34976b6 | 2153 | return FALSE; |
70256ad8 AJ |
2154 | } |
2155 | ||
c434dee6 | 2156 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
2157 | { |
2158 | /* Add some entries to the .dynamic section. We fill in the | |
2159 | values later, in elf64_x86_64_finish_dynamic_sections, but we | |
2160 | must add the entries now so that we get the correct size for | |
407443a3 | 2161 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 2162 | dynamic linker and used by the debugger. */ |
dc810e39 | 2163 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 2164 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 2165 | |
36af4a4e | 2166 | if (info->executable) |
70256ad8 | 2167 | { |
dc810e39 | 2168 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2169 | return FALSE; |
70256ad8 AJ |
2170 | } |
2171 | ||
eea6121a | 2172 | if (htab->splt->size != 0) |
70256ad8 | 2173 | { |
dc810e39 AM |
2174 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2175 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2176 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2177 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2178 | return FALSE; |
67a4f2b7 AO |
2179 | |
2180 | if (htab->tlsdesc_plt | |
2181 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
2182 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
2183 | return FALSE; | |
70256ad8 AJ |
2184 | } |
2185 | ||
2186 | if (relocs) | |
2187 | { | |
dc810e39 AM |
2188 | if (!add_dynamic_entry (DT_RELA, 0) |
2189 | || !add_dynamic_entry (DT_RELASZ, 0) | |
2190 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
b34976b6 | 2191 | return FALSE; |
70256ad8 | 2192 | |
c434dee6 AJ |
2193 | /* If any dynamic relocs apply to a read-only section, |
2194 | then we need a DT_TEXTREL entry. */ | |
2195 | if ((info->flags & DF_TEXTREL) == 0) | |
2196 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
2197 | (PTR) info); | |
2198 | ||
2199 | if ((info->flags & DF_TEXTREL) != 0) | |
2200 | { | |
2201 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 2202 | return FALSE; |
c434dee6 | 2203 | } |
70256ad8 AJ |
2204 | } |
2205 | } | |
dc810e39 | 2206 | #undef add_dynamic_entry |
70256ad8 | 2207 | |
b34976b6 | 2208 | return TRUE; |
70256ad8 AJ |
2209 | } |
2210 | ||
67a4f2b7 AO |
2211 | static bfd_boolean |
2212 | elf64_x86_64_always_size_sections (bfd *output_bfd, | |
2213 | struct bfd_link_info *info) | |
2214 | { | |
2215 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
2216 | ||
2217 | if (tls_sec) | |
2218 | { | |
2219 | struct elf_link_hash_entry *tlsbase; | |
2220 | ||
2221 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
2222 | "_TLS_MODULE_BASE_", | |
2223 | FALSE, FALSE, FALSE); | |
2224 | ||
2225 | if (tlsbase && tlsbase->type == STT_TLS) | |
2226 | { | |
2227 | struct bfd_link_hash_entry *bh = NULL; | |
2228 | const struct elf_backend_data *bed | |
2229 | = get_elf_backend_data (output_bfd); | |
2230 | ||
2231 | if (!(_bfd_generic_link_add_one_symbol | |
2232 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
2233 | tls_sec, 0, NULL, FALSE, | |
2234 | bed->collect, &bh))) | |
2235 | return FALSE; | |
2236 | tlsbase = (struct elf_link_hash_entry *)bh; | |
2237 | tlsbase->def_regular = 1; | |
2238 | tlsbase->other = STV_HIDDEN; | |
2239 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
2240 | } | |
2241 | } | |
2242 | ||
2243 | return TRUE; | |
2244 | } | |
2245 | ||
bffbf940 JJ |
2246 | /* Return the base VMA address which should be subtracted from real addresses |
2247 | when resolving @dtpoff relocation. | |
2248 | This is PT_TLS segment p_vaddr. */ | |
2249 | ||
2250 | static bfd_vma | |
27482721 | 2251 | dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 2252 | { |
e1918d23 AM |
2253 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2254 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 2255 | return 0; |
e1918d23 | 2256 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
2257 | } |
2258 | ||
2259 | /* Return the relocation value for @tpoff relocation | |
2260 | if STT_TLS virtual address is ADDRESS. */ | |
2261 | ||
2262 | static bfd_vma | |
27482721 | 2263 | tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 2264 | { |
e1918d23 | 2265 | struct elf_link_hash_table *htab = elf_hash_table (info); |
bffbf940 JJ |
2266 | |
2267 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 2268 | if (htab->tls_sec == NULL) |
bffbf940 | 2269 | return 0; |
e1918d23 | 2270 | return address - htab->tls_size - htab->tls_sec->vma; |
bffbf940 JJ |
2271 | } |
2272 | ||
90f487df L |
2273 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
2274 | branch? */ | |
2275 | ||
2276 | static bfd_boolean | |
2277 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
2278 | { | |
2279 | /* Opcode Instruction | |
2280 | 0xe8 call | |
2281 | 0xe9 jump | |
2282 | 0x0f 0x8x conditional jump */ | |
2283 | return ((offset > 0 | |
2284 | && (contents [offset - 1] == 0xe8 | |
2285 | || contents [offset - 1] == 0xe9)) | |
2286 | || (offset > 1 | |
2287 | && contents [offset - 2] == 0x0f | |
2288 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
2289 | } | |
2290 | ||
8d88c4ca NC |
2291 | /* Relocate an x86_64 ELF section. */ |
2292 | ||
b34976b6 | 2293 | static bfd_boolean |
27482721 AJ |
2294 | elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info, |
2295 | bfd *input_bfd, asection *input_section, | |
2296 | bfd_byte *contents, Elf_Internal_Rela *relocs, | |
2297 | Elf_Internal_Sym *local_syms, | |
2298 | asection **local_sections) | |
8d88c4ca | 2299 | { |
c434dee6 | 2300 | struct elf64_x86_64_link_hash_table *htab; |
8d88c4ca NC |
2301 | Elf_Internal_Shdr *symtab_hdr; |
2302 | struct elf_link_hash_entry **sym_hashes; | |
2303 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2304 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 2305 | Elf_Internal_Rela *rel; |
8d88c4ca NC |
2306 | Elf_Internal_Rela *relend; |
2307 | ||
c434dee6 | 2308 | htab = elf64_x86_64_hash_table (info); |
8d88c4ca NC |
2309 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
2310 | sym_hashes = elf_sym_hashes (input_bfd); | |
2311 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
67a4f2b7 | 2312 | local_tlsdesc_gotents = elf64_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 2313 | |
c434dee6 | 2314 | rel = relocs; |
8d88c4ca | 2315 | relend = relocs + input_section->reloc_count; |
c434dee6 | 2316 | for (; rel < relend; rel++) |
8d88c4ca | 2317 | { |
bffbf940 | 2318 | unsigned int r_type; |
8d88c4ca NC |
2319 | reloc_howto_type *howto; |
2320 | unsigned long r_symndx; | |
2321 | struct elf_link_hash_entry *h; | |
2322 | Elf_Internal_Sym *sym; | |
2323 | asection *sec; | |
67a4f2b7 | 2324 | bfd_vma off, offplt; |
8d88c4ca | 2325 | bfd_vma relocation; |
b34976b6 | 2326 | bfd_boolean unresolved_reloc; |
8d88c4ca | 2327 | bfd_reloc_status_type r; |
bffbf940 | 2328 | int tls_type; |
8d88c4ca | 2329 | |
c434dee6 | 2330 | r_type = ELF64_R_TYPE (rel->r_info); |
fe4770f4 AJ |
2331 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
2332 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
2333 | continue; | |
8d88c4ca | 2334 | |
bffbf940 | 2335 | if (r_type >= R_X86_64_max) |
8da6118f KH |
2336 | { |
2337 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2338 | return FALSE; |
8da6118f | 2339 | } |
8d88c4ca | 2340 | |
b491616a | 2341 | howto = x86_64_elf_howto_table + r_type; |
c434dee6 | 2342 | r_symndx = ELF64_R_SYM (rel->r_info); |
8d88c4ca NC |
2343 | h = NULL; |
2344 | sym = NULL; | |
2345 | sec = NULL; | |
b34976b6 | 2346 | unresolved_reloc = FALSE; |
8d88c4ca | 2347 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
2348 | { |
2349 | sym = local_syms + r_symndx; | |
2350 | sec = local_sections[r_symndx]; | |
c434dee6 | 2351 | |
8517fae7 | 2352 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
8da6118f | 2353 | } |
8d88c4ca | 2354 | else |
8da6118f | 2355 | { |
560e09e9 | 2356 | bfd_boolean warned; |
c434dee6 | 2357 | |
b2a8e766 AM |
2358 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2359 | r_symndx, symtab_hdr, sym_hashes, | |
2360 | h, sec, relocation, | |
2361 | unresolved_reloc, warned); | |
8da6118f | 2362 | } |
ab96bf03 AM |
2363 | |
2364 | if (sec != NULL && elf_discarded_section (sec)) | |
2365 | { | |
2366 | /* For relocs against symbols from removed linkonce sections, | |
2367 | or sections discarded by a linker script, we just want the | |
2368 | section contents zeroed. Avoid any special processing. */ | |
2369 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
2370 | rel->r_info = 0; | |
2371 | rel->r_addend = 0; | |
2372 | continue; | |
2373 | } | |
2374 | ||
2375 | if (info->relocatable) | |
2376 | continue; | |
2377 | ||
70256ad8 AJ |
2378 | /* When generating a shared object, the relocations handled here are |
2379 | copied into the output file to be resolved at run time. */ | |
2380 | switch (r_type) | |
2381 | { | |
7b81dfbb | 2382 | asection *base_got; |
70256ad8 | 2383 | case R_X86_64_GOT32: |
7b81dfbb | 2384 | case R_X86_64_GOT64: |
70256ad8 AJ |
2385 | /* Relocation is to the entry for this symbol in the global |
2386 | offset table. */ | |
70256ad8 | 2387 | case R_X86_64_GOTPCREL: |
7b81dfbb AJ |
2388 | case R_X86_64_GOTPCREL64: |
2389 | /* Use global offset table entry as symbol value. */ | |
2390 | case R_X86_64_GOTPLT64: | |
2391 | /* This is the same as GOT64 for relocation purposes, but | |
2392 | indicates the existence of a PLT entry. The difficulty is, | |
2393 | that we must calculate the GOT slot offset from the PLT | |
2394 | offset, if this symbol got a PLT entry (it was global). | |
2395 | Additionally if it's computed from the PLT entry, then that | |
2396 | GOT offset is relative to .got.plt, not to .got. */ | |
2397 | base_got = htab->sgot; | |
2398 | ||
c434dee6 AJ |
2399 | if (htab->sgot == NULL) |
2400 | abort (); | |
053579d7 | 2401 | |
51e0a107 | 2402 | if (h != NULL) |
70256ad8 | 2403 | { |
b34976b6 | 2404 | bfd_boolean dyn; |
c434dee6 AJ |
2405 | |
2406 | off = h->got.offset; | |
7b81dfbb AJ |
2407 | if (h->needs_plt |
2408 | && h->plt.offset != (bfd_vma)-1 | |
2409 | && off == (bfd_vma)-1) | |
2410 | { | |
2411 | /* We can't use h->got.offset here to save | |
2412 | state, or even just remember the offset, as | |
2413 | finish_dynamic_symbol would use that as offset into | |
2414 | .got. */ | |
2415 | bfd_vma plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
2416 | off = (plt_index + 3) * GOT_ENTRY_SIZE; | |
2417 | base_got = htab->sgotplt; | |
2418 | } | |
2419 | ||
c434dee6 | 2420 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 2421 | |
27482721 | 2422 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
51e0a107 | 2423 | || (info->shared |
27482721 | 2424 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
2425 | || (ELF_ST_VISIBILITY (h->other) |
2426 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
2427 | { |
2428 | /* This is actually a static link, or it is a -Bsymbolic | |
2429 | link and the symbol is defined locally, or the symbol | |
407443a3 | 2430 | was forced to be local because of a version file. We |
51e0a107 JH |
2431 | must initialize this entry in the global offset table. |
2432 | Since the offset must always be a multiple of 8, we | |
2433 | use the least significant bit to record whether we | |
2434 | have initialized it already. | |
2435 | ||
2436 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
2437 | relocation entry to initialize the value. This is |
2438 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
2439 | if ((off & 1) != 0) |
2440 | off &= ~1; | |
2441 | else | |
2442 | { | |
2443 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
2444 | base_got->contents + off); |
2445 | /* Note that this is harmless for the GOTPLT64 case, | |
2446 | as -1 | 1 still is -1. */ | |
51e0a107 JH |
2447 | h->got.offset |= 1; |
2448 | } | |
2449 | } | |
053579d7 | 2450 | else |
b34976b6 | 2451 | unresolved_reloc = FALSE; |
70256ad8 | 2452 | } |
51e0a107 JH |
2453 | else |
2454 | { | |
c434dee6 AJ |
2455 | if (local_got_offsets == NULL) |
2456 | abort (); | |
51e0a107 JH |
2457 | |
2458 | off = local_got_offsets[r_symndx]; | |
2459 | ||
2460 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
2461 | the least significant bit to record whether we have |
2462 | already generated the necessary reloc. */ | |
51e0a107 JH |
2463 | if ((off & 1) != 0) |
2464 | off &= ~1; | |
2465 | else | |
2466 | { | |
c434dee6 | 2467 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 2468 | base_got->contents + off); |
51e0a107 JH |
2469 | |
2470 | if (info->shared) | |
2471 | { | |
947216bf | 2472 | asection *s; |
51e0a107 | 2473 | Elf_Internal_Rela outrel; |
947216bf | 2474 | bfd_byte *loc; |
70256ad8 | 2475 | |
51e0a107 JH |
2476 | /* We need to generate a R_X86_64_RELATIVE reloc |
2477 | for the dynamic linker. */ | |
947216bf AM |
2478 | s = htab->srelgot; |
2479 | if (s == NULL) | |
c434dee6 | 2480 | abort (); |
51e0a107 | 2481 | |
7b81dfbb AJ |
2482 | outrel.r_offset = (base_got->output_section->vma |
2483 | + base_got->output_offset | |
51e0a107 JH |
2484 | + off); |
2485 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); | |
2486 | outrel.r_addend = relocation; | |
947216bf AM |
2487 | loc = s->contents; |
2488 | loc += s->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 2489 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
51e0a107 JH |
2490 | } |
2491 | ||
2492 | local_got_offsets[r_symndx] |= 1; | |
2493 | } | |
51e0a107 | 2494 | } |
6a2bda3f | 2495 | |
c434dee6 AJ |
2496 | if (off >= (bfd_vma) -2) |
2497 | abort (); | |
2498 | ||
7b81dfbb AJ |
2499 | relocation = base_got->output_section->vma |
2500 | + base_got->output_offset + off; | |
2501 | if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64) | |
8c37241b JJ |
2502 | relocation -= htab->sgotplt->output_section->vma |
2503 | - htab->sgotplt->output_offset; | |
c434dee6 | 2504 | |
70256ad8 AJ |
2505 | break; |
2506 | ||
d6ab8113 JB |
2507 | case R_X86_64_GOTOFF64: |
2508 | /* Relocation is relative to the start of the global offset | |
2509 | table. */ | |
2510 | ||
2511 | /* Check to make sure it isn't a protected function symbol | |
2512 | for shared library since it may not be local when used | |
2513 | as function address. */ | |
2514 | if (info->shared | |
2515 | && h | |
2516 | && h->def_regular | |
2517 | && h->type == STT_FUNC | |
2518 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
2519 | { | |
2520 | (*_bfd_error_handler) | |
2521 | (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"), | |
2522 | input_bfd, h->root.root.string); | |
2523 | bfd_set_error (bfd_error_bad_value); | |
2524 | return FALSE; | |
2525 | } | |
2526 | ||
2527 | /* Note that sgot is not involved in this | |
2528 | calculation. We always want the start of .got.plt. If we | |
2529 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
2530 | permitted by the ABI, we might have to change this | |
2531 | calculation. */ | |
2532 | relocation -= htab->sgotplt->output_section->vma | |
2533 | + htab->sgotplt->output_offset; | |
2534 | break; | |
2535 | ||
2536 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2537 | case R_X86_64_GOTPC64: |
d6ab8113 JB |
2538 | /* Use global offset table as symbol value. */ |
2539 | relocation = htab->sgotplt->output_section->vma | |
2540 | + htab->sgotplt->output_offset; | |
2541 | unresolved_reloc = FALSE; | |
2542 | break; | |
7b81dfbb AJ |
2543 | |
2544 | case R_X86_64_PLTOFF64: | |
2545 | /* Relocation is PLT entry relative to GOT. For local | |
2546 | symbols it's the symbol itself relative to GOT. */ | |
2547 | if (h != NULL | |
2548 | /* See PLT32 handling. */ | |
2549 | && h->plt.offset != (bfd_vma) -1 | |
2550 | && htab->splt != NULL) | |
2551 | { | |
2552 | relocation = (htab->splt->output_section->vma | |
2553 | + htab->splt->output_offset | |
2554 | + h->plt.offset); | |
2555 | unresolved_reloc = FALSE; | |
2556 | } | |
2557 | ||
2558 | relocation -= htab->sgotplt->output_section->vma | |
2559 | + htab->sgotplt->output_offset; | |
2560 | break; | |
d6ab8113 | 2561 | |
70256ad8 AJ |
2562 | case R_X86_64_PLT32: |
2563 | /* Relocation is to the entry for this symbol in the | |
2564 | procedure linkage table. */ | |
2565 | ||
2566 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 2567 | without using the procedure linkage table. */ |
70256ad8 AJ |
2568 | if (h == NULL) |
2569 | break; | |
2570 | ||
c434dee6 AJ |
2571 | if (h->plt.offset == (bfd_vma) -1 |
2572 | || htab->splt == NULL) | |
70256ad8 AJ |
2573 | { |
2574 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
2575 | happens when statically linking PIC code, or when |
2576 | using -Bsymbolic. */ | |
70256ad8 AJ |
2577 | break; |
2578 | } | |
2579 | ||
c434dee6 AJ |
2580 | relocation = (htab->splt->output_section->vma |
2581 | + htab->splt->output_offset | |
70256ad8 | 2582 | + h->plt.offset); |
b34976b6 | 2583 | unresolved_reloc = FALSE; |
70256ad8 AJ |
2584 | break; |
2585 | ||
fd8ab9e5 AJ |
2586 | case R_X86_64_PC8: |
2587 | case R_X86_64_PC16: | |
2588 | case R_X86_64_PC32: | |
6610a52d L |
2589 | if (info->shared |
2590 | && !SYMBOL_REFERENCES_LOCAL (info, h) | |
ba3bee0b | 2591 | && (input_section->flags & SEC_ALLOC) != 0 |
90f487df L |
2592 | && (input_section->flags & SEC_READONLY) != 0 |
2593 | && (!h->def_regular | |
2594 | || r_type != R_X86_64_PC32 | |
2595 | || h->type != STT_FUNC | |
2596 | || ELF_ST_VISIBILITY (h->other) != STV_PROTECTED | |
2597 | || !is_32bit_relative_branch (contents, | |
2598 | rel->r_offset))) | |
6610a52d | 2599 | { |
90f487df L |
2600 | if (h->def_regular |
2601 | && r_type == R_X86_64_PC32 | |
2602 | && h->type == STT_FUNC | |
2603 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
2604 | (*_bfd_error_handler) | |
2605 | (_("%B: relocation R_X86_64_PC32 against protected function `%s' can not be used when making a shared object"), | |
2606 | input_bfd, h->root.root.string); | |
2607 | else | |
2608 | (*_bfd_error_handler) | |
2609 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), | |
2610 | input_bfd, x86_64_elf_howto_table[r_type].name, | |
2611 | h->root.root.string); | |
6610a52d L |
2612 | bfd_set_error (bfd_error_bad_value); |
2613 | return FALSE; | |
2614 | } | |
2615 | /* Fall through. */ | |
2616 | ||
70256ad8 AJ |
2617 | case R_X86_64_8: |
2618 | case R_X86_64_16: | |
2619 | case R_X86_64_32: | |
d6ab8113 | 2620 | case R_X86_64_PC64: |
6b3db546 | 2621 | case R_X86_64_64: |
80643fbc | 2622 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 2623 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 2624 | |
b1e24c02 | 2625 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
2626 | break; |
2627 | ||
2628 | if ((info->shared | |
4bc6e03a AJ |
2629 | && (h == NULL |
2630 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2631 | || h->root.type != bfd_link_hash_undefweak) | |
c434dee6 AJ |
2632 | && ((r_type != R_X86_64_PC8 |
2633 | && r_type != R_X86_64_PC16 | |
d6ab8113 JB |
2634 | && r_type != R_X86_64_PC32 |
2635 | && r_type != R_X86_64_PC64) | |
f6c52c13 | 2636 | || !SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c AJ |
2637 | || (ELIMINATE_COPY_RELOCS |
2638 | && !info->shared | |
c434dee6 AJ |
2639 | && h != NULL |
2640 | && h->dynindx != -1 | |
f5385ebf AM |
2641 | && !h->non_got_ref |
2642 | && ((h->def_dynamic | |
2643 | && !h->def_regular) | |
c434dee6 AJ |
2644 | || h->root.type == bfd_link_hash_undefweak |
2645 | || h->root.type == bfd_link_hash_undefined))) | |
70256ad8 AJ |
2646 | { |
2647 | Elf_Internal_Rela outrel; | |
947216bf | 2648 | bfd_byte *loc; |
b34976b6 | 2649 | bfd_boolean skip, relocate; |
c434dee6 | 2650 | asection *sreloc; |
70256ad8 AJ |
2651 | |
2652 | /* When generating a shared object, these relocations | |
2653 | are copied into the output file to be resolved at run | |
407443a3 | 2654 | time. */ |
b34976b6 AM |
2655 | skip = FALSE; |
2656 | relocate = FALSE; | |
70256ad8 | 2657 | |
c629eae0 JJ |
2658 | outrel.r_offset = |
2659 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 2660 | rel->r_offset); |
c629eae0 | 2661 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 2662 | skip = TRUE; |
0fb19cbc | 2663 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2664 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
2665 | |
2666 | outrel.r_offset += (input_section->output_section->vma | |
2667 | + input_section->output_offset); | |
2668 | ||
2669 | if (skip) | |
0bb2d96a | 2670 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 2671 | |
fd8ab9e5 AJ |
2672 | /* h->dynindx may be -1 if this symbol was marked to |
2673 | become local. */ | |
2674 | else if (h != NULL | |
c434dee6 AJ |
2675 | && h->dynindx != -1 |
2676 | && (r_type == R_X86_64_PC8 | |
2677 | || r_type == R_X86_64_PC16 | |
2678 | || r_type == R_X86_64_PC32 | |
d6ab8113 | 2679 | || r_type == R_X86_64_PC64 |
c434dee6 | 2680 | || !info->shared |
55255dae | 2681 | || !SYMBOLIC_BIND (info, h) |
f5385ebf | 2682 | || !h->def_regular)) |
70256ad8 | 2683 | { |
70256ad8 | 2684 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
c434dee6 | 2685 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
2686 | } |
2687 | else | |
2688 | { | |
c434dee6 | 2689 | /* This symbol is local, or marked to become local. */ |
607c0e09 AS |
2690 | if (r_type == R_X86_64_64) |
2691 | { | |
b34976b6 | 2692 | relocate = TRUE; |
607c0e09 AS |
2693 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
2694 | outrel.r_addend = relocation + rel->r_addend; | |
2695 | } | |
2696 | else | |
2697 | { | |
2698 | long sindx; | |
2699 | ||
8517fae7 | 2700 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
2701 | sindx = 0; |
2702 | else if (sec == NULL || sec->owner == NULL) | |
2703 | { | |
2704 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2705 | return FALSE; |
607c0e09 AS |
2706 | } |
2707 | else | |
2708 | { | |
2709 | asection *osec; | |
2710 | ||
74541ad4 AM |
2711 | /* We are turning this relocation into one |
2712 | against a section symbol. It would be | |
2713 | proper to subtract the symbol's value, | |
2714 | osec->vma, from the emitted reloc addend, | |
2715 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
2716 | osec = sec->output_section; |
2717 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
2718 | if (sindx == 0) |
2719 | { | |
2720 | asection *oi = htab->elf.text_index_section; | |
2721 | sindx = elf_section_data (oi)->dynindx; | |
2722 | } | |
2723 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
2724 | } |
2725 | ||
2726 | outrel.r_info = ELF64_R_INFO (sindx, r_type); | |
2727 | outrel.r_addend = relocation + rel->r_addend; | |
2728 | } | |
70256ad8 AJ |
2729 | } |
2730 | ||
c434dee6 AJ |
2731 | sreloc = elf_section_data (input_section)->sreloc; |
2732 | if (sreloc == NULL) | |
2733 | abort (); | |
2734 | ||
947216bf AM |
2735 | loc = sreloc->contents; |
2736 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 2737 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
70256ad8 AJ |
2738 | |
2739 | /* If this reloc is against an external symbol, we do | |
2740 | not want to fiddle with the addend. Otherwise, we | |
2741 | need to include the symbol value so that it becomes | |
2742 | an addend for the dynamic reloc. */ | |
2743 | if (! relocate) | |
2744 | continue; | |
2745 | } | |
2746 | ||
2747 | break; | |
2748 | ||
bffbf940 | 2749 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
2750 | case R_X86_64_GOTPC32_TLSDESC: |
2751 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 2752 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
2753 | tls_type = GOT_UNKNOWN; |
2754 | if (h == NULL && local_got_offsets) | |
2755 | tls_type = elf64_x86_64_local_got_tls_type (input_bfd) [r_symndx]; | |
2756 | else if (h != NULL) | |
142411ca L |
2757 | tls_type = elf64_x86_64_hash_entry (h)->tls_type; |
2758 | ||
2759 | if (! elf64_x86_64_tls_transition (info, input_bfd, | |
2760 | input_section, contents, | |
2761 | symtab_hdr, sym_hashes, | |
2762 | &r_type, tls_type, rel, | |
2763 | relend, h)) | |
534a31f6 | 2764 | return FALSE; |
bffbf940 JJ |
2765 | |
2766 | if (r_type == R_X86_64_TPOFF32) | |
2767 | { | |
142411ca L |
2768 | bfd_vma roff = rel->r_offset; |
2769 | ||
bffbf940 | 2770 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 2771 | |
bffbf940 JJ |
2772 | if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
2773 | { | |
bffbf940 | 2774 | /* GD->LE transition. |
abcf1d52 | 2775 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
a3fadc9a | 2776 | .word 0x6666; rex64; call __tls_get_addr |
bffbf940 JJ |
2777 | Change it into: |
2778 | movq %fs:0, %rax | |
2779 | leaq foo@tpoff(%rax), %rax */ | |
142411ca | 2780 | memcpy (contents + roff - 4, |
bffbf940 JJ |
2781 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", |
2782 | 16); | |
2783 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
142411ca | 2784 | contents + roff + 8); |
a3fadc9a | 2785 | /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ |
bffbf940 JJ |
2786 | rel++; |
2787 | continue; | |
2788 | } | |
67a4f2b7 AO |
2789 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
2790 | { | |
2791 | /* GDesc -> LE transition. | |
2792 | It's originally something like: | |
2793 | leaq x@tlsdesc(%rip), %rax | |
2794 | ||
2795 | Change it to: | |
2796 | movl $x@tpoff, %rax | |
142411ca | 2797 | */ |
67a4f2b7 AO |
2798 | |
2799 | unsigned int val, type, type2; | |
67a4f2b7 | 2800 | |
67a4f2b7 | 2801 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 2802 | type2 = bfd_get_8 (input_bfd, contents + roff - 2); |
67a4f2b7 | 2803 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
2804 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
2805 | contents + roff - 3); | |
2806 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
2807 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
2808 | contents + roff - 1); | |
2809 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
2810 | contents + roff); | |
2811 | continue; | |
2812 | } | |
2813 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) | |
2814 | { | |
2815 | /* GDesc -> LE transition. | |
2816 | It's originally: | |
2817 | call *(%rax) | |
2818 | Turn it into: | |
142411ca | 2819 | xchg %ax,%ax. */ |
10efb593 | 2820 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
2821 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
2822 | continue; | |
2823 | } | |
142411ca | 2824 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 2825 | { |
bffbf940 JJ |
2826 | /* IE->LE transition: |
2827 | Originally it can be one of: | |
2828 | movq foo@gottpoff(%rip), %reg | |
2829 | addq foo@gottpoff(%rip), %reg | |
2830 | We change it into: | |
2831 | movq $foo, %reg | |
2832 | leaq foo(%reg), %reg | |
2833 | addq $foo, %reg. */ | |
142411ca L |
2834 | |
2835 | unsigned int val, type, reg; | |
2836 | ||
2837 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
2838 | type = bfd_get_8 (input_bfd, contents + roff - 2); | |
2839 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 2840 | reg >>= 3; |
bffbf940 JJ |
2841 | if (type == 0x8b) |
2842 | { | |
2843 | /* movq */ | |
2844 | if (val == 0x4c) | |
2845 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 2846 | contents + roff - 3); |
bffbf940 | 2847 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 2848 | contents + roff - 2); |
bffbf940 | 2849 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 2850 | contents + roff - 1); |
bffbf940 JJ |
2851 | } |
2852 | else if (reg == 4) | |
2853 | { | |
2854 | /* addq -> addq - addressing with %rsp/%r12 is | |
2855 | special */ | |
2856 | if (val == 0x4c) | |
2857 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 2858 | contents + roff - 3); |
bffbf940 | 2859 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 2860 | contents + roff - 2); |
bffbf940 | 2861 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 2862 | contents + roff - 1); |
bffbf940 JJ |
2863 | } |
2864 | else | |
2865 | { | |
2866 | /* addq -> leaq */ | |
2867 | if (val == 0x4c) | |
2868 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 2869 | contents + roff - 3); |
bffbf940 | 2870 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 2871 | contents + roff - 2); |
bffbf940 | 2872 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 2873 | contents + roff - 1); |
bffbf940 JJ |
2874 | } |
2875 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
142411ca | 2876 | contents + roff); |
bffbf940 JJ |
2877 | continue; |
2878 | } | |
142411ca L |
2879 | else |
2880 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
2881 | } |
2882 | ||
2883 | if (htab->sgot == NULL) | |
2884 | abort (); | |
2885 | ||
2886 | if (h != NULL) | |
67a4f2b7 AO |
2887 | { |
2888 | off = h->got.offset; | |
2889 | offplt = elf64_x86_64_hash_entry (h)->tlsdesc_got; | |
2890 | } | |
bffbf940 JJ |
2891 | else |
2892 | { | |
2893 | if (local_got_offsets == NULL) | |
2894 | abort (); | |
2895 | ||
2896 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 2897 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
2898 | } |
2899 | ||
2900 | if ((off & 1) != 0) | |
2901 | off &= ~1; | |
26e41594 | 2902 | else |
bffbf940 JJ |
2903 | { |
2904 | Elf_Internal_Rela outrel; | |
947216bf | 2905 | bfd_byte *loc; |
bffbf940 | 2906 | int dr_type, indx; |
67a4f2b7 | 2907 | asection *sreloc; |
bffbf940 JJ |
2908 | |
2909 | if (htab->srelgot == NULL) | |
2910 | abort (); | |
2911 | ||
67a4f2b7 AO |
2912 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
2913 | ||
2914 | if (GOT_TLS_GDESC_P (tls_type)) | |
2915 | { | |
2916 | outrel.r_info = ELF64_R_INFO (indx, R_X86_64_TLSDESC); | |
2917 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt | |
2918 | + 2 * GOT_ENTRY_SIZE <= htab->sgotplt->size); | |
2919 | outrel.r_offset = (htab->sgotplt->output_section->vma | |
2920 | + htab->sgotplt->output_offset | |
2921 | + offplt | |
2922 | + htab->sgotplt_jump_table_size); | |
2923 | sreloc = htab->srelplt; | |
2924 | loc = sreloc->contents; | |
2925 | loc += sreloc->reloc_count++ | |
2926 | * sizeof (Elf64_External_Rela); | |
2927 | BFD_ASSERT (loc + sizeof (Elf64_External_Rela) | |
2928 | <= sreloc->contents + sreloc->size); | |
2929 | if (indx == 0) | |
2930 | outrel.r_addend = relocation - dtpoff_base (info); | |
2931 | else | |
2932 | outrel.r_addend = 0; | |
2933 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2934 | } | |
2935 | ||
2936 | sreloc = htab->srelgot; | |
2937 | ||
bffbf940 JJ |
2938 | outrel.r_offset = (htab->sgot->output_section->vma |
2939 | + htab->sgot->output_offset + off); | |
2940 | ||
67a4f2b7 | 2941 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 2942 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
2943 | else if (GOT_TLS_GDESC_P (tls_type)) |
2944 | goto dr_done; | |
bffbf940 JJ |
2945 | else |
2946 | dr_type = R_X86_64_TPOFF64; | |
2947 | ||
2948 | bfd_put_64 (output_bfd, 0, htab->sgot->contents + off); | |
2949 | outrel.r_addend = 0; | |
67a4f2b7 AO |
2950 | if ((dr_type == R_X86_64_TPOFF64 |
2951 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
bffbf940 JJ |
2952 | outrel.r_addend = relocation - dtpoff_base (info); |
2953 | outrel.r_info = ELF64_R_INFO (indx, dr_type); | |
2954 | ||
67a4f2b7 AO |
2955 | loc = sreloc->contents; |
2956 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2957 | BFD_ASSERT (loc + sizeof (Elf64_External_Rela) | |
2958 | <= sreloc->contents + sreloc->size); | |
bffbf940 JJ |
2959 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
2960 | ||
67a4f2b7 | 2961 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
2962 | { |
2963 | if (indx == 0) | |
2964 | { | |
d40d037c | 2965 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 JJ |
2966 | bfd_put_64 (output_bfd, |
2967 | relocation - dtpoff_base (info), | |
2968 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2969 | } | |
2970 | else | |
2971 | { | |
2972 | bfd_put_64 (output_bfd, 0, | |
2973 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2974 | outrel.r_info = ELF64_R_INFO (indx, | |
2975 | R_X86_64_DTPOFF64); | |
2976 | outrel.r_offset += GOT_ENTRY_SIZE; | |
67a4f2b7 | 2977 | sreloc->reloc_count++; |
947216bf | 2978 | loc += sizeof (Elf64_External_Rela); |
67a4f2b7 AO |
2979 | BFD_ASSERT (loc + sizeof (Elf64_External_Rela) |
2980 | <= sreloc->contents + sreloc->size); | |
947216bf | 2981 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
bffbf940 JJ |
2982 | } |
2983 | } | |
2984 | ||
67a4f2b7 | 2985 | dr_done: |
bffbf940 JJ |
2986 | if (h != NULL) |
2987 | h->got.offset |= 1; | |
2988 | else | |
2989 | local_got_offsets[r_symndx] |= 1; | |
2990 | } | |
2991 | ||
67a4f2b7 AO |
2992 | if (off >= (bfd_vma) -2 |
2993 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 JJ |
2994 | abort (); |
2995 | if (r_type == ELF64_R_TYPE (rel->r_info)) | |
2996 | { | |
67a4f2b7 AO |
2997 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
2998 | || r_type == R_X86_64_TLSDESC_CALL) | |
2999 | relocation = htab->sgotplt->output_section->vma | |
3000 | + htab->sgotplt->output_offset | |
3001 | + offplt + htab->sgotplt_jump_table_size; | |
3002 | else | |
3003 | relocation = htab->sgot->output_section->vma | |
3004 | + htab->sgot->output_offset + off; | |
b34976b6 | 3005 | unresolved_reloc = FALSE; |
bffbf940 | 3006 | } |
142411ca | 3007 | else |
67a4f2b7 | 3008 | { |
142411ca | 3009 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 3010 | |
142411ca L |
3011 | if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
3012 | { | |
3013 | /* GD->IE transition. | |
3014 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi | |
3015 | .word 0x6666; rex64; call __tls_get_addr@plt | |
3016 | Change it into: | |
3017 | movq %fs:0, %rax | |
3018 | addq foo@gottpoff(%rip), %rax */ | |
3019 | memcpy (contents + roff - 4, | |
3020 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3021 | 16); | |
3022 | ||
3023 | relocation = (htab->sgot->output_section->vma | |
3024 | + htab->sgot->output_offset + off | |
3025 | - roff | |
3026 | - input_section->output_section->vma | |
3027 | - input_section->output_offset | |
3028 | - 12); | |
3029 | bfd_put_32 (output_bfd, relocation, | |
3030 | contents + roff + 8); | |
3031 | /* Skip R_X86_64_PLT32. */ | |
3032 | rel++; | |
3033 | continue; | |
3034 | } | |
3035 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) | |
3036 | { | |
3037 | /* GDesc -> IE transition. | |
3038 | It's originally something like: | |
3039 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 3040 | |
142411ca L |
3041 | Change it to: |
3042 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax | |
3043 | */ | |
67a4f2b7 | 3044 | |
142411ca | 3045 | unsigned int val, type, type2; |
67a4f2b7 | 3046 | |
142411ca L |
3047 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
3048 | type2 = bfd_get_8 (input_bfd, contents + roff - 2); | |
3049 | val = bfd_get_8 (input_bfd, contents + roff - 1); | |
67a4f2b7 | 3050 | |
142411ca L |
3051 | /* Now modify the instruction as appropriate. To |
3052 | turn a leaq into a movq in the form we use it, it | |
3053 | suffices to change the second byte from 0x8d to | |
3054 | 0x8b. */ | |
3055 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
3056 | ||
3057 | bfd_put_32 (output_bfd, | |
3058 | htab->sgot->output_section->vma | |
3059 | + htab->sgot->output_offset + off | |
3060 | - rel->r_offset | |
3061 | - input_section->output_section->vma | |
3062 | - input_section->output_offset | |
3063 | - 4, | |
3064 | contents + roff); | |
3065 | continue; | |
3066 | } | |
3067 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) | |
3068 | { | |
3069 | /* GDesc -> IE transition. | |
3070 | It's originally: | |
3071 | call *(%rax) | |
3072 | ||
3073 | Change it to: | |
3074 | xchg %ax,%ax. */ | |
3075 | ||
3076 | unsigned int val, type; | |
3077 | ||
3078 | type = bfd_get_8 (input_bfd, contents + roff); | |
3079 | val = bfd_get_8 (input_bfd, contents + roff + 1); | |
3080 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
3081 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
3082 | continue; | |
3083 | } | |
3084 | else | |
3085 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 3086 | } |
bffbf940 JJ |
3087 | break; |
3088 | ||
3089 | case R_X86_64_TLSLD: | |
142411ca L |
3090 | if (! elf64_x86_64_tls_transition (info, input_bfd, |
3091 | input_section, contents, | |
3092 | symtab_hdr, sym_hashes, | |
3093 | &r_type, GOT_UNKNOWN, | |
3094 | rel, relend, h)) | |
3095 | return FALSE; | |
a3fadc9a | 3096 | |
142411ca L |
3097 | if (r_type != R_X86_64_TLSLD) |
3098 | { | |
bffbf940 | 3099 | /* LD->LE transition: |
a3fadc9a | 3100 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr. |
bffbf940 JJ |
3101 | We change it into: |
3102 | .word 0x6666; .byte 0x66; movl %fs:0, %rax. */ | |
142411ca L |
3103 | |
3104 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
bffbf940 JJ |
3105 | memcpy (contents + rel->r_offset - 3, |
3106 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
a3fadc9a | 3107 | /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ |
bffbf940 JJ |
3108 | rel++; |
3109 | continue; | |
3110 | } | |
3111 | ||
3112 | if (htab->sgot == NULL) | |
3113 | abort (); | |
3114 | ||
3115 | off = htab->tls_ld_got.offset; | |
3116 | if (off & 1) | |
3117 | off &= ~1; | |
3118 | else | |
3119 | { | |
3120 | Elf_Internal_Rela outrel; | |
947216bf | 3121 | bfd_byte *loc; |
bffbf940 JJ |
3122 | |
3123 | if (htab->srelgot == NULL) | |
3124 | abort (); | |
3125 | ||
3126 | outrel.r_offset = (htab->sgot->output_section->vma | |
3127 | + htab->sgot->output_offset + off); | |
3128 | ||
3129 | bfd_put_64 (output_bfd, 0, | |
3130 | htab->sgot->contents + off); | |
3131 | bfd_put_64 (output_bfd, 0, | |
3132 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
3133 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_DTPMOD64); | |
3134 | outrel.r_addend = 0; | |
947216bf AM |
3135 | loc = htab->srelgot->contents; |
3136 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
bffbf940 JJ |
3137 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
3138 | htab->tls_ld_got.offset |= 1; | |
3139 | } | |
3140 | relocation = htab->sgot->output_section->vma | |
3141 | + htab->sgot->output_offset + off; | |
b34976b6 | 3142 | unresolved_reloc = FALSE; |
bffbf940 JJ |
3143 | break; |
3144 | ||
3145 | case R_X86_64_DTPOFF32: | |
a45bb67d | 3146 | if (info->shared || (input_section->flags & SEC_CODE) == 0) |
bffbf940 JJ |
3147 | relocation -= dtpoff_base (info); |
3148 | else | |
3149 | relocation = tpoff (info, relocation); | |
3150 | break; | |
3151 | ||
3152 | case R_X86_64_TPOFF32: | |
3153 | BFD_ASSERT (! info->shared); | |
3154 | relocation = tpoff (info, relocation); | |
3155 | break; | |
3156 | ||
70256ad8 AJ |
3157 | default: |
3158 | break; | |
3159 | } | |
8d88c4ca | 3160 | |
239e1f3a AM |
3161 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3162 | because such sections are not SEC_ALLOC and thus ld.so will | |
3163 | not process them. */ | |
c434dee6 | 3164 | if (unresolved_reloc |
239e1f3a | 3165 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
f5385ebf | 3166 | && h->def_dynamic)) |
c434dee6 | 3167 | (*_bfd_error_handler) |
843fe662 | 3168 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
3169 | input_bfd, |
3170 | input_section, | |
c434dee6 | 3171 | (long) rel->r_offset, |
843fe662 | 3172 | howto->name, |
c434dee6 AJ |
3173 | h->root.root.string); |
3174 | ||
8d88c4ca | 3175 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
3176 | contents, rel->r_offset, |
3177 | relocation, rel->r_addend); | |
8d88c4ca NC |
3178 | |
3179 | if (r != bfd_reloc_ok) | |
8da6118f | 3180 | { |
c434dee6 AJ |
3181 | const char *name; |
3182 | ||
3183 | if (h != NULL) | |
3184 | name = h->root.root.string; | |
3185 | else | |
8da6118f | 3186 | { |
c434dee6 AJ |
3187 | name = bfd_elf_string_from_elf_section (input_bfd, |
3188 | symtab_hdr->sh_link, | |
3189 | sym->st_name); | |
3190 | if (name == NULL) | |
b34976b6 | 3191 | return FALSE; |
c434dee6 AJ |
3192 | if (*name == '\0') |
3193 | name = bfd_section_name (input_bfd, sec); | |
3194 | } | |
3195 | ||
3196 | if (r == bfd_reloc_overflow) | |
3197 | { | |
c434dee6 | 3198 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
3199 | (info, (h ? &h->root : NULL), name, howto->name, |
3200 | (bfd_vma) 0, input_bfd, input_section, | |
3201 | rel->r_offset))) | |
b34976b6 | 3202 | return FALSE; |
c434dee6 AJ |
3203 | } |
3204 | else | |
3205 | { | |
3206 | (*_bfd_error_handler) | |
d003868e AM |
3207 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
3208 | input_bfd, input_section, | |
c434dee6 | 3209 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 3210 | return FALSE; |
8da6118f KH |
3211 | } |
3212 | } | |
8d88c4ca | 3213 | } |
70256ad8 | 3214 | |
b34976b6 | 3215 | return TRUE; |
70256ad8 AJ |
3216 | } |
3217 | ||
3218 | /* Finish up dynamic symbol handling. We set the contents of various | |
3219 | dynamic sections here. */ | |
3220 | ||
b34976b6 | 3221 | static bfd_boolean |
27482721 AJ |
3222 | elf64_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
3223 | struct bfd_link_info *info, | |
3224 | struct elf_link_hash_entry *h, | |
3225 | Elf_Internal_Sym *sym) | |
70256ad8 | 3226 | { |
c434dee6 | 3227 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 | 3228 | |
c434dee6 | 3229 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
3230 | |
3231 | if (h->plt.offset != (bfd_vma) -1) | |
3232 | { | |
70256ad8 AJ |
3233 | bfd_vma plt_index; |
3234 | bfd_vma got_offset; | |
3235 | Elf_Internal_Rela rela; | |
947216bf | 3236 | bfd_byte *loc; |
70256ad8 AJ |
3237 | |
3238 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 3239 | it up. */ |
c434dee6 AJ |
3240 | if (h->dynindx == -1 |
3241 | || htab->splt == NULL | |
3242 | || htab->sgotplt == NULL | |
3243 | || htab->srelplt == NULL) | |
3244 | abort (); | |
70256ad8 AJ |
3245 | |
3246 | /* Get the index in the procedure linkage table which | |
3247 | corresponds to this symbol. This is the index of this symbol | |
3248 | in all the symbols for which we are making plt entries. The | |
3249 | first entry in the procedure linkage table is reserved. */ | |
3250 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
3251 | ||
3252 | /* Get the offset into the .got table of the entry that | |
407443a3 | 3253 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
fe4770f4 | 3254 | bytes. The first three are reserved for the dynamic linker. */ |
70256ad8 AJ |
3255 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
3256 | ||
3257 | /* Fill in the entry in the procedure linkage table. */ | |
c434dee6 | 3258 | memcpy (htab->splt->contents + h->plt.offset, elf64_x86_64_plt_entry, |
70256ad8 AJ |
3259 | PLT_ENTRY_SIZE); |
3260 | ||
3261 | /* Insert the relocation positions of the plt section. The magic | |
3262 | numbers at the end of the statements are the positions of the | |
3263 | relocations in the plt section. */ | |
653165cc AJ |
3264 | /* Put offset for jmp *name@GOTPCREL(%rip), since the |
3265 | instruction uses 6 bytes, subtract this value. */ | |
3266 | bfd_put_32 (output_bfd, | |
c434dee6 AJ |
3267 | (htab->sgotplt->output_section->vma |
3268 | + htab->sgotplt->output_offset | |
653165cc | 3269 | + got_offset |
c434dee6 AJ |
3270 | - htab->splt->output_section->vma |
3271 | - htab->splt->output_offset | |
653165cc AJ |
3272 | - h->plt.offset |
3273 | - 6), | |
c434dee6 | 3274 | htab->splt->contents + h->plt.offset + 2); |
653165cc AJ |
3275 | /* Put relocation index. */ |
3276 | bfd_put_32 (output_bfd, plt_index, | |
c434dee6 | 3277 | htab->splt->contents + h->plt.offset + 7); |
653165cc AJ |
3278 | /* Put offset for jmp .PLT0. */ |
3279 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), | |
c434dee6 | 3280 | htab->splt->contents + h->plt.offset + 12); |
70256ad8 | 3281 | |
653165cc AJ |
3282 | /* Fill in the entry in the global offset table, initially this |
3283 | points to the pushq instruction in the PLT which is at offset 6. */ | |
c434dee6 AJ |
3284 | bfd_put_64 (output_bfd, (htab->splt->output_section->vma |
3285 | + htab->splt->output_offset | |
70256ad8 | 3286 | + h->plt.offset + 6), |
c434dee6 | 3287 | htab->sgotplt->contents + got_offset); |
70256ad8 AJ |
3288 | |
3289 | /* Fill in the entry in the .rela.plt section. */ | |
c434dee6 AJ |
3290 | rela.r_offset = (htab->sgotplt->output_section->vma |
3291 | + htab->sgotplt->output_offset | |
70256ad8 AJ |
3292 | + got_offset); |
3293 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_JUMP_SLOT); | |
3294 | rela.r_addend = 0; | |
947216bf | 3295 | loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela); |
c434dee6 | 3296 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 | 3297 | |
f5385ebf | 3298 | if (!h->def_regular) |
70256ad8 AJ |
3299 | { |
3300 | /* Mark the symbol as undefined, rather than as defined in | |
47a9f7b3 JJ |
3301 | the .plt section. Leave the value if there were any |
3302 | relocations where pointer equality matters (this is a clue | |
c434dee6 AJ |
3303 | for the dynamic linker, to make function pointer |
3304 | comparisons work between an application and shared | |
47a9f7b3 JJ |
3305 | library), otherwise set it to zero. If a function is only |
3306 | called from a binary, there is no need to slow down | |
3307 | shared libraries because of that. */ | |
70256ad8 | 3308 | sym->st_shndx = SHN_UNDEF; |
f5385ebf | 3309 | if (!h->pointer_equality_needed) |
47a9f7b3 | 3310 | sym->st_value = 0; |
70256ad8 AJ |
3311 | } |
3312 | } | |
3313 | ||
bffbf940 | 3314 | if (h->got.offset != (bfd_vma) -1 |
67a4f2b7 | 3315 | && ! GOT_TLS_GD_ANY_P (elf64_x86_64_hash_entry (h)->tls_type) |
bffbf940 | 3316 | && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE) |
053579d7 | 3317 | { |
053579d7 | 3318 | Elf_Internal_Rela rela; |
947216bf | 3319 | bfd_byte *loc; |
053579d7 AJ |
3320 | |
3321 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 3322 | up. */ |
c434dee6 AJ |
3323 | if (htab->sgot == NULL || htab->srelgot == NULL) |
3324 | abort (); | |
053579d7 | 3325 | |
c434dee6 AJ |
3326 | rela.r_offset = (htab->sgot->output_section->vma |
3327 | + htab->sgot->output_offset | |
dc810e39 | 3328 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
3329 | |
3330 | /* If this is a static link, or it is a -Bsymbolic link and the | |
3331 | symbol is defined locally or was forced to be local because | |
3332 | of a version file, we just want to emit a RELATIVE reloc. | |
3333 | The entry in the global offset table will already have been | |
3334 | initialized in the relocate_section function. */ | |
c434dee6 | 3335 | if (info->shared |
27482721 | 3336 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
053579d7 | 3337 | { |
cc78d0af | 3338 | BFD_ASSERT((h->got.offset & 1) != 0); |
053579d7 AJ |
3339 | rela.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
3340 | rela.r_addend = (h->root.u.def.value | |
3341 | + h->root.u.def.section->output_section->vma | |
3342 | + h->root.u.def.section->output_offset); | |
3343 | } | |
3344 | else | |
3345 | { | |
3346 | BFD_ASSERT((h->got.offset & 1) == 0); | |
c434dee6 AJ |
3347 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
3348 | htab->sgot->contents + h->got.offset); | |
053579d7 AJ |
3349 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_GLOB_DAT); |
3350 | rela.r_addend = 0; | |
3351 | } | |
3352 | ||
947216bf AM |
3353 | loc = htab->srelgot->contents; |
3354 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 3355 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
053579d7 AJ |
3356 | } |
3357 | ||
f5385ebf | 3358 | if (h->needs_copy) |
70256ad8 | 3359 | { |
70256ad8 | 3360 | Elf_Internal_Rela rela; |
947216bf | 3361 | bfd_byte *loc; |
70256ad8 AJ |
3362 | |
3363 | /* This symbol needs a copy reloc. Set it up. */ | |
3364 | ||
c434dee6 AJ |
3365 | if (h->dynindx == -1 |
3366 | || (h->root.type != bfd_link_hash_defined | |
3367 | && h->root.type != bfd_link_hash_defweak) | |
3368 | || htab->srelbss == NULL) | |
3369 | abort (); | |
70256ad8 AJ |
3370 | |
3371 | rela.r_offset = (h->root.u.def.value | |
3372 | + h->root.u.def.section->output_section->vma | |
3373 | + h->root.u.def.section->output_offset); | |
3374 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_COPY); | |
3375 | rela.r_addend = 0; | |
947216bf AM |
3376 | loc = htab->srelbss->contents; |
3377 | loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 3378 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 AJ |
3379 | } |
3380 | ||
3381 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
3382 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
22edb2f1 | 3383 | || h == htab->elf.hgot) |
70256ad8 AJ |
3384 | sym->st_shndx = SHN_ABS; |
3385 | ||
b34976b6 | 3386 | return TRUE; |
70256ad8 AJ |
3387 | } |
3388 | ||
c434dee6 AJ |
3389 | /* Used to decide how to sort relocs in an optimal manner for the |
3390 | dynamic linker, before writing them out. */ | |
3391 | ||
3392 | static enum elf_reloc_type_class | |
27482721 | 3393 | elf64_x86_64_reloc_type_class (const Elf_Internal_Rela *rela) |
c434dee6 AJ |
3394 | { |
3395 | switch ((int) ELF64_R_TYPE (rela->r_info)) | |
3396 | { | |
3397 | case R_X86_64_RELATIVE: | |
3398 | return reloc_class_relative; | |
3399 | case R_X86_64_JUMP_SLOT: | |
3400 | return reloc_class_plt; | |
3401 | case R_X86_64_COPY: | |
3402 | return reloc_class_copy; | |
3403 | default: | |
3404 | return reloc_class_normal; | |
3405 | } | |
3406 | } | |
3407 | ||
70256ad8 AJ |
3408 | /* Finish up the dynamic sections. */ |
3409 | ||
b34976b6 | 3410 | static bfd_boolean |
27482721 | 3411 | elf64_x86_64_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
70256ad8 | 3412 | { |
c434dee6 | 3413 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
3414 | bfd *dynobj; |
3415 | asection *sdyn; | |
70256ad8 | 3416 | |
c434dee6 AJ |
3417 | htab = elf64_x86_64_hash_table (info); |
3418 | dynobj = htab->elf.dynobj; | |
70256ad8 AJ |
3419 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
3420 | ||
c434dee6 | 3421 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 3422 | { |
70256ad8 AJ |
3423 | Elf64_External_Dyn *dyncon, *dynconend; |
3424 | ||
c434dee6 AJ |
3425 | if (sdyn == NULL || htab->sgot == NULL) |
3426 | abort (); | |
70256ad8 AJ |
3427 | |
3428 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
eea6121a | 3429 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); |
70256ad8 AJ |
3430 | for (; dyncon < dynconend; dyncon++) |
3431 | { | |
3432 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
3433 | asection *s; |
3434 | ||
3435 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); | |
3436 | ||
3437 | switch (dyn.d_tag) | |
3438 | { | |
3439 | default: | |
053579d7 | 3440 | continue; |
70256ad8 AJ |
3441 | |
3442 | case DT_PLTGOT: | |
8c37241b JJ |
3443 | s = htab->sgotplt; |
3444 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
c434dee6 | 3445 | break; |
70256ad8 AJ |
3446 | |
3447 | case DT_JMPREL: | |
c434dee6 AJ |
3448 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
3449 | break; | |
70256ad8 | 3450 | |
c434dee6 AJ |
3451 | case DT_PLTRELSZ: |
3452 | s = htab->srelplt->output_section; | |
eea6121a | 3453 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
3454 | break; |
3455 | ||
3456 | case DT_RELASZ: | |
c434dee6 AJ |
3457 | /* The procedure linkage table relocs (DT_JMPREL) should |
3458 | not be included in the overall relocs (DT_RELA). | |
3459 | Therefore, we override the DT_RELASZ entry here to | |
3460 | make it not include the JMPREL relocs. Since the | |
3461 | linker script arranges for .rela.plt to follow all | |
3462 | other relocation sections, we don't have to worry | |
3463 | about changing the DT_RELA entry. */ | |
3464 | if (htab->srelplt != NULL) | |
70256ad8 | 3465 | { |
c434dee6 | 3466 | s = htab->srelplt->output_section; |
eea6121a | 3467 | dyn.d_un.d_val -= s->size; |
70256ad8 AJ |
3468 | } |
3469 | break; | |
67a4f2b7 AO |
3470 | |
3471 | case DT_TLSDESC_PLT: | |
3472 | s = htab->splt; | |
3473 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset | |
3474 | + htab->tlsdesc_plt; | |
3475 | break; | |
3476 | ||
3477 | case DT_TLSDESC_GOT: | |
3478 | s = htab->sgot; | |
3479 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset | |
3480 | + htab->tlsdesc_got; | |
3481 | break; | |
70256ad8 | 3482 | } |
c434dee6 | 3483 | |
70256ad8 AJ |
3484 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
3485 | } | |
3486 | ||
c434dee6 | 3487 | /* Fill in the special first entry in the procedure linkage table. */ |
eea6121a | 3488 | if (htab->splt && htab->splt->size > 0) |
70256ad8 | 3489 | { |
653165cc | 3490 | /* Fill in the first entry in the procedure linkage table. */ |
c434dee6 AJ |
3491 | memcpy (htab->splt->contents, elf64_x86_64_plt0_entry, |
3492 | PLT_ENTRY_SIZE); | |
653165cc AJ |
3493 | /* Add offset for pushq GOT+8(%rip), since the instruction |
3494 | uses 6 bytes subtract this value. */ | |
3495 | bfd_put_32 (output_bfd, | |
c434dee6 AJ |
3496 | (htab->sgotplt->output_section->vma |
3497 | + htab->sgotplt->output_offset | |
653165cc | 3498 | + 8 |
c434dee6 AJ |
3499 | - htab->splt->output_section->vma |
3500 | - htab->splt->output_offset | |
653165cc | 3501 | - 6), |
c434dee6 | 3502 | htab->splt->contents + 2); |
653165cc AJ |
3503 | /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to |
3504 | the end of the instruction. */ | |
3505 | bfd_put_32 (output_bfd, | |
c434dee6 AJ |
3506 | (htab->sgotplt->output_section->vma |
3507 | + htab->sgotplt->output_offset | |
653165cc | 3508 | + 16 |
c434dee6 AJ |
3509 | - htab->splt->output_section->vma |
3510 | - htab->splt->output_offset | |
653165cc | 3511 | - 12), |
c434dee6 | 3512 | htab->splt->contents + 8); |
653165cc | 3513 | |
c434dee6 AJ |
3514 | elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize = |
3515 | PLT_ENTRY_SIZE; | |
67a4f2b7 AO |
3516 | |
3517 | if (htab->tlsdesc_plt) | |
3518 | { | |
3519 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
3520 | htab->sgot->contents + htab->tlsdesc_got); | |
3521 | ||
3522 | memcpy (htab->splt->contents + htab->tlsdesc_plt, | |
3523 | elf64_x86_64_plt0_entry, | |
3524 | PLT_ENTRY_SIZE); | |
3525 | ||
3526 | /* Add offset for pushq GOT+8(%rip), since the | |
3527 | instruction uses 6 bytes subtract this value. */ | |
3528 | bfd_put_32 (output_bfd, | |
3529 | (htab->sgotplt->output_section->vma | |
3530 | + htab->sgotplt->output_offset | |
3531 | + 8 | |
3532 | - htab->splt->output_section->vma | |
3533 | - htab->splt->output_offset | |
3534 | - htab->tlsdesc_plt | |
3535 | - 6), | |
3536 | htab->splt->contents + htab->tlsdesc_plt + 2); | |
3537 | /* Add offset for jmp *GOT+TDG(%rip), where TGD stands for | |
3538 | htab->tlsdesc_got. The 12 is the offset to the end of | |
3539 | the instruction. */ | |
3540 | bfd_put_32 (output_bfd, | |
3541 | (htab->sgot->output_section->vma | |
3542 | + htab->sgot->output_offset | |
3543 | + htab->tlsdesc_got | |
3544 | - htab->splt->output_section->vma | |
3545 | - htab->splt->output_offset | |
3546 | - htab->tlsdesc_plt | |
3547 | - 12), | |
3548 | htab->splt->contents + htab->tlsdesc_plt + 8); | |
3549 | } | |
70256ad8 | 3550 | } |
70256ad8 AJ |
3551 | } |
3552 | ||
c434dee6 | 3553 | if (htab->sgotplt) |
70256ad8 | 3554 | { |
c434dee6 | 3555 | /* Fill in the first three entries in the global offset table. */ |
eea6121a | 3556 | if (htab->sgotplt->size > 0) |
c434dee6 AJ |
3557 | { |
3558 | /* Set the first entry in the global offset table to the address of | |
3559 | the dynamic section. */ | |
3560 | if (sdyn == NULL) | |
3561 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents); | |
3562 | else | |
3563 | bfd_put_64 (output_bfd, | |
3564 | sdyn->output_section->vma + sdyn->output_offset, | |
3565 | htab->sgotplt->contents); | |
3566 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ | |
3567 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE); | |
3568 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE*2); | |
3569 | } | |
70256ad8 | 3570 | |
c434dee6 AJ |
3571 | elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = |
3572 | GOT_ENTRY_SIZE; | |
3573 | } | |
70256ad8 | 3574 | |
eea6121a | 3575 | if (htab->sgot && htab->sgot->size > 0) |
8c37241b JJ |
3576 | elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize |
3577 | = GOT_ENTRY_SIZE; | |
3578 | ||
b34976b6 | 3579 | return TRUE; |
8d88c4ca NC |
3580 | } |
3581 | ||
4c45e5c9 JJ |
3582 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
3583 | or (bfd_vma) -1 if it should not be included. */ | |
3584 | ||
3585 | static bfd_vma | |
3586 | elf64_x86_64_plt_sym_val (bfd_vma i, const asection *plt, | |
3587 | const arelent *rel ATTRIBUTE_UNUSED) | |
3588 | { | |
3589 | return plt->vma + (i + 1) * PLT_ENTRY_SIZE; | |
3590 | } | |
8df9fc9d | 3591 | |
d2b2c203 DJ |
3592 | /* Handle an x86-64 specific section when reading an object file. This |
3593 | is called when elfcode.h finds a section with an unknown type. */ | |
3594 | ||
3595 | static bfd_boolean | |
6dc132d9 L |
3596 | elf64_x86_64_section_from_shdr (bfd *abfd, |
3597 | Elf_Internal_Shdr *hdr, | |
3598 | const char *name, | |
3599 | int shindex) | |
d2b2c203 DJ |
3600 | { |
3601 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
3602 | return FALSE; | |
3603 | ||
6dc132d9 | 3604 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
3605 | return FALSE; |
3606 | ||
3607 | return TRUE; | |
3608 | } | |
3609 | ||
3b22753a L |
3610 | /* Hook called by the linker routine which adds symbols from an object |
3611 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
3612 | of .bss. */ | |
3613 | ||
3614 | static bfd_boolean | |
3615 | elf64_x86_64_add_symbol_hook (bfd *abfd, | |
3616 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
3617 | Elf_Internal_Sym *sym, | |
3618 | const char **namep ATTRIBUTE_UNUSED, | |
3619 | flagword *flagsp ATTRIBUTE_UNUSED, | |
3620 | asection **secp, bfd_vma *valp) | |
3621 | { | |
3622 | asection *lcomm; | |
3623 | ||
3624 | switch (sym->st_shndx) | |
3625 | { | |
3626 | case SHN_X86_64_LCOMMON: | |
3627 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
3628 | if (lcomm == NULL) | |
3629 | { | |
3630 | lcomm = bfd_make_section_with_flags (abfd, | |
3631 | "LARGE_COMMON", | |
3632 | (SEC_ALLOC | |
3633 | | SEC_IS_COMMON | |
3634 | | SEC_LINKER_CREATED)); | |
3635 | if (lcomm == NULL) | |
3636 | return FALSE; | |
3637 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
3638 | } | |
3639 | *secp = lcomm; | |
3640 | *valp = sym->st_size; | |
3641 | break; | |
3642 | } | |
3643 | return TRUE; | |
3644 | } | |
3645 | ||
3646 | ||
3647 | /* Given a BFD section, try to locate the corresponding ELF section | |
3648 | index. */ | |
3649 | ||
3650 | static bfd_boolean | |
3651 | elf64_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, | |
3652 | asection *sec, int *index) | |
3653 | { | |
3654 | if (sec == &_bfd_elf_large_com_section) | |
3655 | { | |
3656 | *index = SHN_X86_64_LCOMMON; | |
3657 | return TRUE; | |
3658 | } | |
3659 | return FALSE; | |
3660 | } | |
3661 | ||
3662 | /* Process a symbol. */ | |
3663 | ||
3664 | static void | |
3665 | elf64_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, | |
3666 | asymbol *asym) | |
3667 | { | |
3668 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
3669 | ||
3670 | switch (elfsym->internal_elf_sym.st_shndx) | |
3671 | { | |
3672 | case SHN_X86_64_LCOMMON: | |
3673 | asym->section = &_bfd_elf_large_com_section; | |
3674 | asym->value = elfsym->internal_elf_sym.st_size; | |
3675 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
3676 | asym->flags &= ~BSF_GLOBAL; | |
3677 | break; | |
3678 | } | |
3679 | } | |
3680 | ||
3681 | static bfd_boolean | |
3682 | elf64_x86_64_common_definition (Elf_Internal_Sym *sym) | |
3683 | { | |
3684 | return (sym->st_shndx == SHN_COMMON | |
3685 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
3686 | } | |
3687 | ||
3688 | static unsigned int | |
3689 | elf64_x86_64_common_section_index (asection *sec) | |
3690 | { | |
3691 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
3692 | return SHN_COMMON; | |
3693 | else | |
3694 | return SHN_X86_64_LCOMMON; | |
3695 | } | |
3696 | ||
3697 | static asection * | |
3698 | elf64_x86_64_common_section (asection *sec) | |
3699 | { | |
3700 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
3701 | return bfd_com_section_ptr; | |
3702 | else | |
3703 | return &_bfd_elf_large_com_section; | |
3704 | } | |
3705 | ||
3706 | static bfd_boolean | |
3707 | elf64_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
3708 | struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED, | |
3709 | struct elf_link_hash_entry *h, | |
3710 | Elf_Internal_Sym *sym, | |
00492999 | 3711 | asection **psec, |
3b22753a L |
3712 | bfd_vma *pvalue ATTRIBUTE_UNUSED, |
3713 | unsigned int *pold_alignment ATTRIBUTE_UNUSED, | |
3714 | bfd_boolean *skip ATTRIBUTE_UNUSED, | |
3715 | bfd_boolean *override ATTRIBUTE_UNUSED, | |
3716 | bfd_boolean *type_change_ok ATTRIBUTE_UNUSED, | |
3717 | bfd_boolean *size_change_ok ATTRIBUTE_UNUSED, | |
3718 | bfd_boolean *newdef ATTRIBUTE_UNUSED, | |
3719 | bfd_boolean *newdyn, | |
3720 | bfd_boolean *newdyncommon ATTRIBUTE_UNUSED, | |
3721 | bfd_boolean *newweak ATTRIBUTE_UNUSED, | |
3722 | bfd *abfd ATTRIBUTE_UNUSED, | |
3723 | asection **sec, | |
3724 | bfd_boolean *olddef ATTRIBUTE_UNUSED, | |
3725 | bfd_boolean *olddyn, | |
3726 | bfd_boolean *olddyncommon ATTRIBUTE_UNUSED, | |
3727 | bfd_boolean *oldweak ATTRIBUTE_UNUSED, | |
00492999 | 3728 | bfd *oldbfd, |
3b22753a L |
3729 | asection **oldsec) |
3730 | { | |
3731 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
3732 | normal common symbol. We turn the large common symbol into a |
3733 | normal one. */ | |
3b22753a L |
3734 | if (!*olddyn |
3735 | && h->root.type == bfd_link_hash_common | |
3736 | && !*newdyn | |
3737 | && bfd_is_com_section (*sec) | |
00492999 | 3738 | && *oldsec != *sec) |
3b22753a | 3739 | { |
00492999 L |
3740 | if (sym->st_shndx == SHN_COMMON |
3741 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0) | |
3742 | { | |
3743 | h->root.u.c.p->section | |
3744 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
3745 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
3746 | } | |
3747 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
3748 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0) | |
9a2e389a | 3749 | *psec = *sec = bfd_com_section_ptr; |
3b22753a L |
3750 | } |
3751 | ||
3752 | return TRUE; | |
3753 | } | |
3754 | ||
3755 | static int | |
a6b96beb AM |
3756 | elf64_x86_64_additional_program_headers (bfd *abfd, |
3757 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
3758 | { |
3759 | asection *s; | |
9a2e389a | 3760 | int count = 0; |
3b22753a L |
3761 | |
3762 | /* Check to see if we need a large readonly segment. */ | |
3763 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
3764 | if (s && (s->flags & SEC_LOAD)) | |
3765 | count++; | |
3766 | ||
3767 | /* Check to see if we need a large data segment. Since .lbss sections | |
3768 | is placed right after the .bss section, there should be no need for | |
3769 | a large data segment just because of .lbss. */ | |
3770 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
3771 | if (s && (s->flags & SEC_LOAD)) | |
3772 | count++; | |
3773 | ||
3774 | return count; | |
3775 | } | |
3776 | ||
fdc90cb4 JJ |
3777 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
3778 | ||
3779 | static bfd_boolean | |
3780 | elf64_x86_64_hash_symbol (struct elf_link_hash_entry *h) | |
3781 | { | |
3782 | if (h->plt.offset != (bfd_vma) -1 | |
3783 | && !h->def_regular | |
3784 | && !h->pointer_equality_needed) | |
3785 | return FALSE; | |
3786 | ||
3787 | return _bfd_elf_hash_symbol (h); | |
3788 | } | |
3789 | ||
9a2e389a | 3790 | static const struct bfd_elf_special_section |
3b22753a L |
3791 | elf64_x86_64_special_sections[]= |
3792 | { | |
0112cd26 NC |
3793 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
3794 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
3795 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
3796 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
3797 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
3798 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
3799 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
3800 | }; |
3801 | ||
70256ad8 AJ |
3802 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec |
3803 | #define TARGET_LITTLE_NAME "elf64-x86-64" | |
3804 | #define ELF_ARCH bfd_arch_i386 | |
3805 | #define ELF_MACHINE_CODE EM_X86_64 | |
f7661549 | 3806 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 3807 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 3808 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
3809 | |
3810 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 3811 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
3812 | #define elf_backend_want_got_plt 1 |
3813 | #define elf_backend_plt_readonly 1 | |
3814 | #define elf_backend_want_plt_sym 0 | |
3815 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 3816 | #define elf_backend_rela_normal 1 |
70256ad8 AJ |
3817 | |
3818 | #define elf_info_to_howto elf64_x86_64_info_to_howto | |
70256ad8 | 3819 | |
70256ad8 AJ |
3820 | #define bfd_elf64_bfd_link_hash_table_create \ |
3821 | elf64_x86_64_link_hash_table_create | |
407443a3 | 3822 | #define bfd_elf64_bfd_reloc_type_lookup elf64_x86_64_reloc_type_lookup |
157090f7 AM |
3823 | #define bfd_elf64_bfd_reloc_name_lookup \ |
3824 | elf64_x86_64_reloc_name_lookup | |
70256ad8 AJ |
3825 | |
3826 | #define elf_backend_adjust_dynamic_symbol elf64_x86_64_adjust_dynamic_symbol | |
3827 | #define elf_backend_check_relocs elf64_x86_64_check_relocs | |
c434dee6 AJ |
3828 | #define elf_backend_copy_indirect_symbol elf64_x86_64_copy_indirect_symbol |
3829 | #define elf_backend_create_dynamic_sections elf64_x86_64_create_dynamic_sections | |
3830 | #define elf_backend_finish_dynamic_sections elf64_x86_64_finish_dynamic_sections | |
70256ad8 AJ |
3831 | #define elf_backend_finish_dynamic_symbol elf64_x86_64_finish_dynamic_symbol |
3832 | #define elf_backend_gc_mark_hook elf64_x86_64_gc_mark_hook | |
3833 | #define elf_backend_gc_sweep_hook elf64_x86_64_gc_sweep_hook | |
3bab7989 ML |
3834 | #define elf_backend_grok_prstatus elf64_x86_64_grok_prstatus |
3835 | #define elf_backend_grok_psinfo elf64_x86_64_grok_psinfo | |
c434dee6 | 3836 | #define elf_backend_reloc_type_class elf64_x86_64_reloc_type_class |
70256ad8 AJ |
3837 | #define elf_backend_relocate_section elf64_x86_64_relocate_section |
3838 | #define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections | |
67a4f2b7 | 3839 | #define elf_backend_always_size_sections elf64_x86_64_always_size_sections |
74541ad4 | 3840 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
4c45e5c9 | 3841 | #define elf_backend_plt_sym_val elf64_x86_64_plt_sym_val |
407443a3 | 3842 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
bffbf940 | 3843 | #define bfd_elf64_mkobject elf64_x86_64_mkobject |
8d88c4ca | 3844 | |
d2b2c203 DJ |
3845 | #define elf_backend_section_from_shdr \ |
3846 | elf64_x86_64_section_from_shdr | |
3847 | ||
3b22753a L |
3848 | #define elf_backend_section_from_bfd_section \ |
3849 | elf64_x86_64_elf_section_from_bfd_section | |
3850 | #define elf_backend_add_symbol_hook \ | |
3851 | elf64_x86_64_add_symbol_hook | |
3852 | #define elf_backend_symbol_processing \ | |
3853 | elf64_x86_64_symbol_processing | |
3854 | #define elf_backend_common_section_index \ | |
3855 | elf64_x86_64_common_section_index | |
3856 | #define elf_backend_common_section \ | |
3857 | elf64_x86_64_common_section | |
3858 | #define elf_backend_common_definition \ | |
3859 | elf64_x86_64_common_definition | |
3860 | #define elf_backend_merge_symbol \ | |
3861 | elf64_x86_64_merge_symbol | |
3862 | #define elf_backend_special_sections \ | |
3863 | elf64_x86_64_special_sections | |
3864 | #define elf_backend_additional_program_headers \ | |
3865 | elf64_x86_64_additional_program_headers | |
fdc90cb4 JJ |
3866 | #define elf_backend_hash_symbol \ |
3867 | elf64_x86_64_hash_symbol | |
3b22753a | 3868 | |
8d88c4ca | 3869 | #include "elf64-target.h" |
9d7cbccd NC |
3870 | |
3871 | /* FreeBSD support. */ | |
3872 | ||
3873 | #undef TARGET_LITTLE_SYM | |
3874 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec | |
3875 | #undef TARGET_LITTLE_NAME | |
3876 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
3877 | ||
d1036acb L |
3878 | #undef ELF_OSABI |
3879 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd NC |
3880 | |
3881 | #undef elf_backend_post_process_headers | |
d1036acb | 3882 | #define elf_backend_post_process_headers _bfd_elf_set_osabi |
9d7cbccd NC |
3883 | |
3884 | #undef elf64_bed | |
3885 | #define elf64_bed elf64_x86_64_fbsd_bed | |
3886 | ||
3887 | #include "elf64-target.h" |