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 | |
10 | the Free Software Foundation; either version 2 of the License, or | |
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 | |
3e110533 | 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
8d88c4ca NC |
21 | |
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
c434dee6 | 24 | #include "bfdlink.h" |
8d88c4ca NC |
25 | #include "libbfd.h" |
26 | #include "elf-bfd.h" | |
27 | ||
28 | #include "elf/x86-64.h" | |
29 | ||
8d88c4ca NC |
30 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
31 | #define MINUS_ONE (~ (bfd_vma) 0) | |
32 | ||
33 | /* The relocation "howto" table. Order of fields: | |
7b81dfbb AJ |
34 | type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow, |
35 | special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */ | |
70256ad8 AJ |
36 | static reloc_howto_type x86_64_elf_howto_table[] = |
37 | { | |
b34976b6 AM |
38 | HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
39 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, | |
40 | FALSE), | |
41 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
42 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, | |
43 | FALSE), | |
44 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
45 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, | |
46 | TRUE), | |
47 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
48 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, | |
49 | FALSE), | |
50 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
51 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, | |
52 | TRUE), | |
53 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
54 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, | |
55 | FALSE), | |
56 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
57 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, | |
58 | MINUS_ONE, FALSE), | |
59 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
60 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, | |
61 | MINUS_ONE, FALSE), | |
62 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
63 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, | |
64 | MINUS_ONE, FALSE), | |
65 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
66 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, | |
67 | 0xffffffff, TRUE), | |
68 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, | |
69 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
70 | FALSE), | |
71 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
72 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, | |
73 | FALSE), | |
74 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
75 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), | |
b0360d8c | 76 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
b34976b6 | 77 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), |
ac2aa337 | 78 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
b34976b6 AM |
79 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), |
80 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
81 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), | |
82 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
83 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, | |
84 | MINUS_ONE, FALSE), | |
85 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
86 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, | |
87 | MINUS_ONE, FALSE), | |
88 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
89 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, | |
90 | MINUS_ONE, FALSE), | |
91 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
92 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, | |
93 | 0xffffffff, TRUE), | |
94 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
95 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, | |
96 | 0xffffffff, TRUE), | |
ac2aa337 | 97 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
b34976b6 AM |
98 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, |
99 | 0xffffffff, FALSE), | |
100 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
101 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, | |
102 | 0xffffffff, TRUE), | |
103 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
104 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, | |
105 | 0xffffffff, FALSE), | |
d6ab8113 JB |
106 | HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
107 | bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE, | |
108 | TRUE), | |
109 | HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
110 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", | |
111 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
112 | HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
113 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", | |
114 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
7b81dfbb AJ |
115 | HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, |
116 | bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE, | |
117 | FALSE), | |
118 | HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
119 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE, | |
120 | MINUS_ONE, TRUE), | |
121 | HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
122 | bfd_elf_generic_reloc, "R_X86_64_GOTPC64", | |
123 | FALSE, MINUS_ONE, MINUS_ONE, TRUE), | |
124 | HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
125 | bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE, | |
126 | MINUS_ONE, FALSE), | |
127 | HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
128 | bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE, | |
129 | MINUS_ONE, FALSE), | |
67a4f2b7 AO |
130 | EMPTY_HOWTO (32), |
131 | EMPTY_HOWTO (33), | |
132 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0, | |
133 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
134 | "R_X86_64_GOTPC32_TLSDESC", | |
135 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
136 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0, | |
137 | complain_overflow_dont, bfd_elf_generic_reloc, | |
138 | "R_X86_64_TLSDESC_CALL", | |
139 | FALSE, 0, 0, FALSE), | |
140 | HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0, | |
141 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
142 | "R_X86_64_TLSDESC", | |
143 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
fe4770f4 | 144 | |
a33d77bc JB |
145 | /* We have a gap in the reloc numbers here. |
146 | R_X86_64_standard counts the number up to this point, and | |
147 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
148 | R_X86_64_GNU_VT* to form an index into this table. */ | |
67a4f2b7 | 149 | #define R_X86_64_standard (R_X86_64_TLSDESC + 1) |
a33d77bc JB |
150 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
151 | ||
fe4770f4 | 152 | /* GNU extension to record C++ vtable hierarchy. */ |
b34976b6 AM |
153 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
154 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
155 | |
156 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
157 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
158 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
159 | FALSE) | |
8d88c4ca NC |
160 | }; |
161 | ||
162 | /* Map BFD relocs to the x86_64 elf relocs. */ | |
70256ad8 AJ |
163 | struct elf_reloc_map |
164 | { | |
8d88c4ca NC |
165 | bfd_reloc_code_real_type bfd_reloc_val; |
166 | unsigned char elf_reloc_val; | |
167 | }; | |
168 | ||
dc810e39 | 169 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 170 | { |
70256ad8 AJ |
171 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
172 | { BFD_RELOC_64, R_X86_64_64, }, | |
173 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
174 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
175 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
176 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
177 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
178 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
179 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
180 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
181 | { BFD_RELOC_32, R_X86_64_32, }, | |
182 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
183 | { BFD_RELOC_16, R_X86_64_16, }, | |
184 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
185 | { BFD_RELOC_8, R_X86_64_8, }, | |
186 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
187 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
188 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
189 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
190 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
191 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
192 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
193 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
194 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
195 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
196 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
197 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
198 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
199 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
200 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
201 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
202 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
67a4f2b7 AO |
203 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
204 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
205 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
fe4770f4 AJ |
206 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
207 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
208 | }; |
209 | ||
67a4f2b7 AO |
210 | static reloc_howto_type * |
211 | elf64_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) | |
212 | { | |
213 | unsigned i; | |
214 | ||
215 | if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
216 | || r_type >= (unsigned int) R_X86_64_max) | |
217 | { | |
218 | if (r_type >= (unsigned int) R_X86_64_standard) | |
219 | { | |
220 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), | |
221 | abfd, (int) r_type); | |
222 | r_type = R_X86_64_NONE; | |
223 | } | |
224 | i = r_type; | |
225 | } | |
226 | else | |
227 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
228 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
229 | return &x86_64_elf_howto_table[i]; | |
230 | } | |
8d88c4ca NC |
231 | |
232 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
233 | static reloc_howto_type * | |
67a4f2b7 | 234 | elf64_x86_64_reloc_type_lookup (bfd *abfd, |
27482721 | 235 | bfd_reloc_code_real_type code) |
8d88c4ca NC |
236 | { |
237 | unsigned int i; | |
27482721 | 238 | |
8d88c4ca NC |
239 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
240 | i++) | |
241 | { | |
242 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
67a4f2b7 AO |
243 | return elf64_x86_64_rtype_to_howto (abfd, |
244 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca NC |
245 | } |
246 | return 0; | |
247 | } | |
248 | ||
157090f7 AM |
249 | static reloc_howto_type * |
250 | elf64_x86_64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
251 | const char *r_name) | |
252 | { | |
253 | unsigned int i; | |
254 | ||
255 | for (i = 0; | |
256 | i < (sizeof (x86_64_elf_howto_table) | |
257 | / sizeof (x86_64_elf_howto_table[0])); | |
258 | i++) | |
259 | if (x86_64_elf_howto_table[i].name != NULL | |
260 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
261 | return &x86_64_elf_howto_table[i]; | |
262 | ||
263 | return NULL; | |
264 | } | |
265 | ||
8d88c4ca | 266 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 267 | |
8d88c4ca | 268 | static void |
27482721 AJ |
269 | elf64_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
270 | Elf_Internal_Rela *dst) | |
8d88c4ca | 271 | { |
67a4f2b7 | 272 | unsigned r_type; |
8d88c4ca NC |
273 | |
274 | r_type = ELF64_R_TYPE (dst->r_info); | |
67a4f2b7 | 275 | cache_ptr->howto = elf64_x86_64_rtype_to_howto (abfd, r_type); |
8d88c4ca NC |
276 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
277 | } | |
70256ad8 | 278 | \f |
3bab7989 | 279 | /* Support for core dump NOTE sections. */ |
b34976b6 | 280 | static bfd_boolean |
27482721 | 281 | elf64_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
282 | { |
283 | int offset; | |
eea6121a | 284 | size_t size; |
3bab7989 ML |
285 | |
286 | switch (note->descsz) | |
287 | { | |
288 | default: | |
b34976b6 | 289 | return FALSE; |
3bab7989 ML |
290 | |
291 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ | |
292 | /* pr_cursig */ | |
cedb70c5 | 293 | elf_tdata (abfd)->core_signal |
3bab7989 ML |
294 | = bfd_get_16 (abfd, note->descdata + 12); |
295 | ||
296 | /* pr_pid */ | |
cedb70c5 | 297 | elf_tdata (abfd)->core_pid |
3bab7989 ML |
298 | = bfd_get_32 (abfd, note->descdata + 32); |
299 | ||
300 | /* pr_reg */ | |
301 | offset = 112; | |
eea6121a | 302 | size = 216; |
3bab7989 ML |
303 | |
304 | break; | |
305 | } | |
306 | ||
307 | /* Make a ".reg/999" section. */ | |
308 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 309 | size, note->descpos + offset); |
3bab7989 ML |
310 | } |
311 | ||
b34976b6 | 312 | static bfd_boolean |
27482721 | 313 | elf64_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
314 | { |
315 | switch (note->descsz) | |
316 | { | |
317 | default: | |
b34976b6 | 318 | return FALSE; |
3bab7989 ML |
319 | |
320 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ | |
321 | elf_tdata (abfd)->core_program | |
322 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); | |
323 | elf_tdata (abfd)->core_command | |
324 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); | |
325 | } | |
326 | ||
327 | /* Note that for some reason, a spurious space is tacked | |
328 | onto the end of the args in some (at least one anyway) | |
329 | implementations, so strip it off if it exists. */ | |
330 | ||
331 | { | |
332 | char *command = elf_tdata (abfd)->core_command; | |
333 | int n = strlen (command); | |
334 | ||
335 | if (0 < n && command[n - 1] == ' ') | |
336 | command[n - 1] = '\0'; | |
337 | } | |
338 | ||
b34976b6 | 339 | return TRUE; |
3bab7989 ML |
340 | } |
341 | \f | |
407443a3 | 342 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 343 | |
407443a3 | 344 | /* The name of the dynamic interpreter. This is put in the .interp |
70256ad8 AJ |
345 | section. */ |
346 | ||
407443a3 | 347 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
70256ad8 | 348 | |
d40d037c AJ |
349 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
350 | copying dynamic variables from a shared lib into an app's dynbss | |
351 | section, and instead use a dynamic relocation to point into the | |
352 | shared lib. */ | |
353 | #define ELIMINATE_COPY_RELOCS 1 | |
354 | ||
70256ad8 AJ |
355 | /* The size in bytes of an entry in the global offset table. */ |
356 | ||
357 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 358 | |
70256ad8 | 359 | /* The size in bytes of an entry in the procedure linkage table. */ |
8d88c4ca | 360 | |
70256ad8 AJ |
361 | #define PLT_ENTRY_SIZE 16 |
362 | ||
363 | /* The first entry in a procedure linkage table looks like this. See the | |
364 | SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */ | |
365 | ||
366 | static const bfd_byte elf64_x86_64_plt0_entry[PLT_ENTRY_SIZE] = | |
367 | { | |
653165cc AJ |
368 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
369 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 370 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
371 | }; |
372 | ||
373 | /* Subsequent entries in a procedure linkage table look like this. */ | |
374 | ||
375 | static const bfd_byte elf64_x86_64_plt_entry[PLT_ENTRY_SIZE] = | |
376 | { | |
653165cc | 377 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 378 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 379 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
380 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
381 | 0xe9, /* jmp relative */ | |
382 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
383 | }; | |
384 | ||
385 | /* The x86-64 linker needs to keep track of the number of relocs that | |
985142a4 | 386 | it decides to copy as dynamic relocs in check_relocs for each symbol. |
c434dee6 AJ |
387 | This is so that it can later discard them if they are found to be |
388 | unnecessary. We store the information in a field extending the | |
389 | regular ELF linker hash table. */ | |
70256ad8 | 390 | |
c434dee6 | 391 | struct elf64_x86_64_dyn_relocs |
70256ad8 AJ |
392 | { |
393 | /* Next section. */ | |
c434dee6 AJ |
394 | struct elf64_x86_64_dyn_relocs *next; |
395 | ||
396 | /* The input section of the reloc. */ | |
397 | asection *sec; | |
398 | ||
399 | /* Total number of relocs copied for the input section. */ | |
70256ad8 | 400 | bfd_size_type count; |
c434dee6 AJ |
401 | |
402 | /* Number of pc-relative relocs copied for the input section. */ | |
403 | bfd_size_type pc_count; | |
70256ad8 AJ |
404 | }; |
405 | ||
406 | /* x86-64 ELF linker hash entry. */ | |
407 | ||
408 | struct elf64_x86_64_link_hash_entry | |
409 | { | |
c434dee6 | 410 | struct elf_link_hash_entry elf; |
70256ad8 | 411 | |
c434dee6 AJ |
412 | /* Track dynamic relocs copied for this symbol. */ |
413 | struct elf64_x86_64_dyn_relocs *dyn_relocs; | |
bffbf940 JJ |
414 | |
415 | #define GOT_UNKNOWN 0 | |
416 | #define GOT_NORMAL 1 | |
417 | #define GOT_TLS_GD 2 | |
418 | #define GOT_TLS_IE 3 | |
67a4f2b7 AO |
419 | #define GOT_TLS_GDESC 4 |
420 | #define GOT_TLS_GD_BOTH_P(type) \ | |
421 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
422 | #define GOT_TLS_GD_P(type) \ | |
423 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
424 | #define GOT_TLS_GDESC_P(type) \ | |
425 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
426 | #define GOT_TLS_GD_ANY_P(type) \ | |
427 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
bffbf940 | 428 | unsigned char tls_type; |
67a4f2b7 AO |
429 | |
430 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, | |
431 | starting at the end of the jump table. */ | |
432 | bfd_vma tlsdesc_got; | |
bffbf940 JJ |
433 | }; |
434 | ||
435 | #define elf64_x86_64_hash_entry(ent) \ | |
436 | ((struct elf64_x86_64_link_hash_entry *)(ent)) | |
437 | ||
438 | struct elf64_x86_64_obj_tdata | |
439 | { | |
440 | struct elf_obj_tdata root; | |
441 | ||
442 | /* tls_type for each local got entry. */ | |
443 | char *local_got_tls_type; | |
67a4f2b7 AO |
444 | |
445 | /* GOTPLT entries for TLS descriptors. */ | |
446 | bfd_vma *local_tlsdesc_gotent; | |
70256ad8 AJ |
447 | }; |
448 | ||
bffbf940 JJ |
449 | #define elf64_x86_64_tdata(abfd) \ |
450 | ((struct elf64_x86_64_obj_tdata *) (abfd)->tdata.any) | |
451 | ||
452 | #define elf64_x86_64_local_got_tls_type(abfd) \ | |
453 | (elf64_x86_64_tdata (abfd)->local_got_tls_type) | |
454 | ||
67a4f2b7 AO |
455 | #define elf64_x86_64_local_tlsdesc_gotent(abfd) \ |
456 | (elf64_x86_64_tdata (abfd)->local_tlsdesc_gotent) | |
bffbf940 | 457 | |
c434dee6 | 458 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 459 | |
407443a3 AJ |
460 | struct elf64_x86_64_link_hash_table |
461 | { | |
c434dee6 | 462 | struct elf_link_hash_table elf; |
70256ad8 | 463 | |
c434dee6 AJ |
464 | /* Short-cuts to get to dynamic linker sections. */ |
465 | asection *sgot; | |
466 | asection *sgotplt; | |
467 | asection *srelgot; | |
468 | asection *splt; | |
469 | asection *srelplt; | |
470 | asection *sdynbss; | |
471 | asection *srelbss; | |
70256ad8 | 472 | |
67a4f2b7 AO |
473 | /* The offset into splt of the PLT entry for the TLS descriptor |
474 | resolver. Special values are 0, if not necessary (or not found | |
475 | to be necessary yet), and -1 if needed but not determined | |
476 | yet. */ | |
477 | bfd_vma tlsdesc_plt; | |
478 | /* The offset into sgot of the GOT entry used by the PLT entry | |
479 | above. */ | |
480 | bfd_vma tlsdesc_got; | |
481 | ||
bffbf940 JJ |
482 | union { |
483 | bfd_signed_vma refcount; | |
484 | bfd_vma offset; | |
485 | } tls_ld_got; | |
486 | ||
67a4f2b7 AO |
487 | /* The amount of space used by the jump slots in the GOT. */ |
488 | bfd_vma sgotplt_jump_table_size; | |
489 | ||
c434dee6 AJ |
490 | /* Small local sym to section mapping cache. */ |
491 | struct sym_sec_cache sym_sec; | |
492 | }; | |
70256ad8 AJ |
493 | |
494 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca NC |
495 | |
496 | #define elf64_x86_64_hash_table(p) \ | |
497 | ((struct elf64_x86_64_link_hash_table *) ((p)->hash)) | |
498 | ||
67a4f2b7 AO |
499 | #define elf64_x86_64_compute_jump_table_size(htab) \ |
500 | ((htab)->srelplt->reloc_count * GOT_ENTRY_SIZE) | |
501 | ||
407443a3 | 502 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
503 | |
504 | static struct bfd_hash_entry * | |
27482721 AJ |
505 | link_hash_newfunc (struct bfd_hash_entry *entry, struct bfd_hash_table *table, |
506 | const char *string) | |
70256ad8 | 507 | { |
70256ad8 | 508 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
509 | subclass. */ |
510 | if (entry == NULL) | |
511 | { | |
512 | entry = bfd_hash_allocate (table, | |
513 | sizeof (struct elf64_x86_64_link_hash_entry)); | |
514 | if (entry == NULL) | |
515 | return entry; | |
516 | } | |
70256ad8 AJ |
517 | |
518 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
519 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
520 | if (entry != NULL) | |
70256ad8 | 521 | { |
c434dee6 AJ |
522 | struct elf64_x86_64_link_hash_entry *eh; |
523 | ||
524 | eh = (struct elf64_x86_64_link_hash_entry *) entry; | |
525 | eh->dyn_relocs = NULL; | |
bffbf940 | 526 | eh->tls_type = GOT_UNKNOWN; |
67a4f2b7 | 527 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
528 | } |
529 | ||
c434dee6 | 530 | return entry; |
70256ad8 AJ |
531 | } |
532 | ||
8d88c4ca NC |
533 | /* Create an X86-64 ELF linker hash table. */ |
534 | ||
535 | static struct bfd_link_hash_table * | |
27482721 | 536 | elf64_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca NC |
537 | { |
538 | struct elf64_x86_64_link_hash_table *ret; | |
dc810e39 | 539 | bfd_size_type amt = sizeof (struct elf64_x86_64_link_hash_table); |
8d88c4ca | 540 | |
e2d34d7d | 541 | ret = (struct elf64_x86_64_link_hash_table *) bfd_malloc (amt); |
c434dee6 | 542 | if (ret == NULL) |
8d88c4ca NC |
543 | return NULL; |
544 | ||
66eb6687 AM |
545 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, |
546 | sizeof (struct elf64_x86_64_link_hash_entry))) | |
8d88c4ca | 547 | { |
e2d34d7d | 548 | free (ret); |
8d88c4ca NC |
549 | return NULL; |
550 | } | |
551 | ||
c434dee6 AJ |
552 | ret->sgot = NULL; |
553 | ret->sgotplt = NULL; | |
554 | ret->srelgot = NULL; | |
555 | ret->splt = NULL; | |
556 | ret->srelplt = NULL; | |
557 | ret->sdynbss = NULL; | |
558 | ret->srelbss = NULL; | |
559 | ret->sym_sec.abfd = NULL; | |
67a4f2b7 AO |
560 | ret->tlsdesc_plt = 0; |
561 | ret->tlsdesc_got = 0; | |
bffbf940 | 562 | ret->tls_ld_got.refcount = 0; |
67a4f2b7 | 563 | ret->sgotplt_jump_table_size = 0; |
c434dee6 AJ |
564 | |
565 | return &ret->elf.root; | |
566 | } | |
567 | ||
568 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
569 | shortcuts to them in our hash table. */ | |
570 | ||
b34976b6 | 571 | static bfd_boolean |
27482721 | 572 | create_got_section (bfd *dynobj, struct bfd_link_info *info) |
c434dee6 AJ |
573 | { |
574 | struct elf64_x86_64_link_hash_table *htab; | |
575 | ||
576 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 577 | return FALSE; |
c434dee6 AJ |
578 | |
579 | htab = elf64_x86_64_hash_table (info); | |
580 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
581 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
582 | if (!htab->sgot || !htab->sgotplt) | |
583 | abort (); | |
584 | ||
3496cb2a L |
585 | htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got", |
586 | (SEC_ALLOC | SEC_LOAD | |
587 | | SEC_HAS_CONTENTS | |
588 | | SEC_IN_MEMORY | |
589 | | SEC_LINKER_CREATED | |
590 | | SEC_READONLY)); | |
c434dee6 | 591 | if (htab->srelgot == NULL |
c434dee6 | 592 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) |
b34976b6 AM |
593 | return FALSE; |
594 | return TRUE; | |
c434dee6 AJ |
595 | } |
596 | ||
597 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
598 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
599 | hash table. */ | |
600 | ||
b34976b6 | 601 | static bfd_boolean |
27482721 | 602 | elf64_x86_64_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
c434dee6 AJ |
603 | { |
604 | struct elf64_x86_64_link_hash_table *htab; | |
605 | ||
606 | htab = elf64_x86_64_hash_table (info); | |
607 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
b34976b6 | 608 | return FALSE; |
c434dee6 AJ |
609 | |
610 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
b34976b6 | 611 | return FALSE; |
c434dee6 AJ |
612 | |
613 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
614 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
615 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
616 | if (!info->shared) | |
617 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
618 | ||
619 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
620 | || (!info->shared && !htab->srelbss)) | |
621 | abort (); | |
622 | ||
b34976b6 | 623 | return TRUE; |
c434dee6 AJ |
624 | } |
625 | ||
626 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
627 | ||
628 | static void | |
fcfa13d2 | 629 | elf64_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
27482721 AJ |
630 | struct elf_link_hash_entry *dir, |
631 | struct elf_link_hash_entry *ind) | |
c434dee6 AJ |
632 | { |
633 | struct elf64_x86_64_link_hash_entry *edir, *eind; | |
634 | ||
635 | edir = (struct elf64_x86_64_link_hash_entry *) dir; | |
636 | eind = (struct elf64_x86_64_link_hash_entry *) ind; | |
637 | ||
638 | if (eind->dyn_relocs != NULL) | |
639 | { | |
640 | if (edir->dyn_relocs != NULL) | |
641 | { | |
642 | struct elf64_x86_64_dyn_relocs **pp; | |
643 | struct elf64_x86_64_dyn_relocs *p; | |
644 | ||
fcfa13d2 | 645 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
646 | list. Merge any entries against the same section. */ |
647 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
648 | { | |
649 | struct elf64_x86_64_dyn_relocs *q; | |
650 | ||
651 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
652 | if (q->sec == p->sec) | |
653 | { | |
654 | q->pc_count += p->pc_count; | |
655 | q->count += p->count; | |
656 | *pp = p->next; | |
657 | break; | |
658 | } | |
659 | if (q == NULL) | |
660 | pp = &p->next; | |
661 | } | |
662 | *pp = edir->dyn_relocs; | |
663 | } | |
664 | ||
665 | edir->dyn_relocs = eind->dyn_relocs; | |
666 | eind->dyn_relocs = NULL; | |
667 | } | |
668 | ||
bffbf940 JJ |
669 | if (ind->root.type == bfd_link_hash_indirect |
670 | && dir->got.refcount <= 0) | |
671 | { | |
672 | edir->tls_type = eind->tls_type; | |
673 | eind->tls_type = GOT_UNKNOWN; | |
674 | } | |
675 | ||
d40d037c AJ |
676 | if (ELIMINATE_COPY_RELOCS |
677 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
678 | && dir->dynamic_adjusted) |
679 | { | |
680 | /* If called to transfer flags for a weakdef during processing | |
681 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
682 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
683 | dir->ref_dynamic |= ind->ref_dynamic; | |
684 | dir->ref_regular |= ind->ref_regular; | |
685 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
686 | dir->needs_plt |= ind->needs_plt; | |
687 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
688 | } | |
d40d037c | 689 | else |
fcfa13d2 | 690 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
8d88c4ca NC |
691 | } |
692 | ||
b34976b6 | 693 | static bfd_boolean |
27482721 | 694 | elf64_x86_64_mkobject (bfd *abfd) |
8d88c4ca | 695 | { |
bffbf940 | 696 | if (abfd->tdata.any == NULL) |
62d7a5f6 AM |
697 | { |
698 | bfd_size_type amt = sizeof (struct elf64_x86_64_obj_tdata); | |
699 | abfd->tdata.any = bfd_zalloc (abfd, amt); | |
700 | if (abfd->tdata.any == NULL) | |
701 | return FALSE; | |
702 | } | |
703 | return bfd_elf_mkobject (abfd); | |
bffbf940 JJ |
704 | } |
705 | ||
b34976b6 | 706 | static bfd_boolean |
27482721 | 707 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 708 | { |
8d88c4ca NC |
709 | /* Set the right machine number for an x86-64 elf64 file. */ |
710 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 711 | return TRUE; |
8d88c4ca NC |
712 | } |
713 | ||
bffbf940 | 714 | static int |
27482721 | 715 | elf64_x86_64_tls_transition (struct bfd_link_info *info, int r_type, int is_local) |
bffbf940 JJ |
716 | { |
717 | if (info->shared) | |
718 | return r_type; | |
719 | ||
720 | switch (r_type) | |
721 | { | |
722 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
723 | case R_X86_64_GOTPC32_TLSDESC: |
724 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
725 | case R_X86_64_GOTTPOFF: |
726 | if (is_local) | |
727 | return R_X86_64_TPOFF32; | |
728 | return R_X86_64_GOTTPOFF; | |
729 | case R_X86_64_TLSLD: | |
730 | return R_X86_64_TPOFF32; | |
731 | } | |
732 | ||
733 | return r_type; | |
734 | } | |
735 | ||
70256ad8 | 736 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
737 | calculate needed space in the global offset table, procedure |
738 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 739 | |
b34976b6 | 740 | static bfd_boolean |
27482721 AJ |
741 | elf64_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec, |
742 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 743 | { |
c434dee6 | 744 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
745 | Elf_Internal_Shdr *symtab_hdr; |
746 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
747 | const Elf_Internal_Rela *rel; |
748 | const Elf_Internal_Rela *rel_end; | |
70256ad8 AJ |
749 | asection *sreloc; |
750 | ||
1049f94e | 751 | if (info->relocatable) |
b34976b6 | 752 | return TRUE; |
70256ad8 | 753 | |
c434dee6 | 754 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
755 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
756 | sym_hashes = elf_sym_hashes (abfd); | |
70256ad8 | 757 | |
c434dee6 AJ |
758 | sreloc = NULL; |
759 | ||
70256ad8 AJ |
760 | rel_end = relocs + sec->reloc_count; |
761 | for (rel = relocs; rel < rel_end; rel++) | |
762 | { | |
bffbf940 | 763 | unsigned int r_type; |
70256ad8 AJ |
764 | unsigned long r_symndx; |
765 | struct elf_link_hash_entry *h; | |
766 | ||
767 | r_symndx = ELF64_R_SYM (rel->r_info); | |
bffbf940 | 768 | r_type = ELF64_R_TYPE (rel->r_info); |
c434dee6 AJ |
769 | |
770 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
771 | { | |
d003868e AM |
772 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
773 | abfd, r_symndx); | |
b34976b6 | 774 | return FALSE; |
c434dee6 AJ |
775 | } |
776 | ||
70256ad8 AJ |
777 | if (r_symndx < symtab_hdr->sh_info) |
778 | h = NULL; | |
779 | else | |
71cb9464 L |
780 | { |
781 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
782 | while (h->root.type == bfd_link_hash_indirect | |
783 | || h->root.type == bfd_link_hash_warning) | |
784 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
785 | } | |
70256ad8 | 786 | |
bffbf940 JJ |
787 | r_type = elf64_x86_64_tls_transition (info, r_type, h == NULL); |
788 | switch (r_type) | |
70256ad8 | 789 | { |
bffbf940 JJ |
790 | case R_X86_64_TLSLD: |
791 | htab->tls_ld_got.refcount += 1; | |
792 | goto create_got; | |
793 | ||
794 | case R_X86_64_TPOFF32: | |
795 | if (info->shared) | |
70256ad8 | 796 | { |
bffbf940 | 797 | (*_bfd_error_handler) |
d003868e AM |
798 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
799 | abfd, | |
6610a52d L |
800 | x86_64_elf_howto_table[r_type].name, |
801 | (h) ? h->root.root.string : "a local symbol"); | |
bffbf940 | 802 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 803 | return FALSE; |
70256ad8 | 804 | } |
bffbf940 | 805 | break; |
c434dee6 | 806 | |
bffbf940 JJ |
807 | case R_X86_64_GOTTPOFF: |
808 | if (info->shared) | |
809 | info->flags |= DF_STATIC_TLS; | |
810 | /* Fall through */ | |
70256ad8 | 811 | |
bffbf940 JJ |
812 | case R_X86_64_GOT32: |
813 | case R_X86_64_GOTPCREL: | |
814 | case R_X86_64_TLSGD: | |
7b81dfbb AJ |
815 | case R_X86_64_GOT64: |
816 | case R_X86_64_GOTPCREL64: | |
817 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
818 | case R_X86_64_GOTPC32_TLSDESC: |
819 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
820 | /* This symbol requires a global offset table entry. */ |
821 | { | |
822 | int tls_type, old_tls_type; | |
823 | ||
824 | switch (r_type) | |
825 | { | |
826 | default: tls_type = GOT_NORMAL; break; | |
827 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
828 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
829 | case R_X86_64_GOTPC32_TLSDESC: |
830 | case R_X86_64_TLSDESC_CALL: | |
831 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
832 | } |
833 | ||
834 | if (h != NULL) | |
835 | { | |
7b81dfbb AJ |
836 | if (r_type == R_X86_64_GOTPLT64) |
837 | { | |
838 | /* This relocation indicates that we also need | |
839 | a PLT entry, as this is a function. We don't need | |
840 | a PLT entry for local symbols. */ | |
841 | h->needs_plt = 1; | |
842 | h->plt.refcount += 1; | |
843 | } | |
bffbf940 JJ |
844 | h->got.refcount += 1; |
845 | old_tls_type = elf64_x86_64_hash_entry (h)->tls_type; | |
846 | } | |
847 | else | |
848 | { | |
849 | bfd_signed_vma *local_got_refcounts; | |
850 | ||
851 | /* This is a global offset table entry for a local symbol. */ | |
852 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
853 | if (local_got_refcounts == NULL) | |
854 | { | |
855 | bfd_size_type size; | |
856 | ||
857 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
858 | size *= sizeof (bfd_signed_vma) |
859 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
860 | local_got_refcounts = ((bfd_signed_vma *) |
861 | bfd_zalloc (abfd, size)); | |
862 | if (local_got_refcounts == NULL) | |
b34976b6 | 863 | return FALSE; |
bffbf940 | 864 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
67a4f2b7 AO |
865 | elf64_x86_64_local_tlsdesc_gotent (abfd) |
866 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); | |
bffbf940 | 867 | elf64_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 868 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
869 | } |
870 | local_got_refcounts[r_symndx] += 1; | |
871 | old_tls_type | |
872 | = elf64_x86_64_local_got_tls_type (abfd) [r_symndx]; | |
873 | } | |
874 | ||
875 | /* If a TLS symbol is accessed using IE at least once, | |
876 | there is no point to use dynamic model for it. */ | |
877 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
878 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
879 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 880 | { |
67a4f2b7 | 881 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 882 | tls_type = old_tls_type; |
67a4f2b7 AO |
883 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
884 | && GOT_TLS_GD_ANY_P (tls_type)) | |
885 | tls_type |= old_tls_type; | |
bffbf940 JJ |
886 | else |
887 | { | |
888 | (*_bfd_error_handler) | |
d003868e AM |
889 | (_("%B: %s' accessed both as normal and thread local symbol"), |
890 | abfd, h ? h->root.root.string : "<local>"); | |
b34976b6 | 891 | return FALSE; |
bffbf940 JJ |
892 | } |
893 | } | |
894 | ||
895 | if (old_tls_type != tls_type) | |
896 | { | |
897 | if (h != NULL) | |
898 | elf64_x86_64_hash_entry (h)->tls_type = tls_type; | |
899 | else | |
900 | elf64_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
901 | } | |
902 | } | |
c434dee6 AJ |
903 | /* Fall through */ |
904 | ||
d6ab8113 JB |
905 | case R_X86_64_GOTOFF64: |
906 | case R_X86_64_GOTPC32: | |
7b81dfbb | 907 | case R_X86_64_GOTPC64: |
bffbf940 | 908 | create_got: |
c434dee6 AJ |
909 | if (htab->sgot == NULL) |
910 | { | |
911 | if (htab->elf.dynobj == NULL) | |
912 | htab->elf.dynobj = abfd; | |
913 | if (!create_got_section (htab->elf.dynobj, info)) | |
b34976b6 | 914 | return FALSE; |
c434dee6 | 915 | } |
70256ad8 AJ |
916 | break; |
917 | ||
918 | case R_X86_64_PLT32: | |
919 | /* This symbol requires a procedure linkage table entry. We | |
407443a3 AJ |
920 | actually build the entry in adjust_dynamic_symbol, |
921 | because this might be a case of linking PIC code which is | |
922 | never referenced by a dynamic object, in which case we | |
923 | don't need to generate a procedure linkage table entry | |
924 | after all. */ | |
70256ad8 AJ |
925 | |
926 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 927 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
928 | if (h == NULL) |
929 | continue; | |
930 | ||
f5385ebf | 931 | h->needs_plt = 1; |
51b64d56 | 932 | h->plt.refcount += 1; |
70256ad8 AJ |
933 | break; |
934 | ||
7b81dfbb AJ |
935 | case R_X86_64_PLTOFF64: |
936 | /* This tries to form the 'address' of a function relative | |
937 | to GOT. For global symbols we need a PLT entry. */ | |
938 | if (h != NULL) | |
939 | { | |
940 | h->needs_plt = 1; | |
941 | h->plt.refcount += 1; | |
942 | } | |
943 | goto create_got; | |
944 | ||
cc78d0af AJ |
945 | case R_X86_64_8: |
946 | case R_X86_64_16: | |
70256ad8 AJ |
947 | case R_X86_64_32: |
948 | case R_X86_64_32S: | |
1b71fb54 AJ |
949 | /* Let's help debug shared library creation. These relocs |
950 | cannot be used in shared libs. Don't error out for | |
951 | sections we don't care about, such as debug sections or | |
952 | non-constant sections. */ | |
953 | if (info->shared | |
954 | && (sec->flags & SEC_ALLOC) != 0 | |
955 | && (sec->flags & SEC_READONLY) != 0) | |
956 | { | |
957 | (*_bfd_error_handler) | |
d003868e AM |
958 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
959 | abfd, | |
6610a52d L |
960 | x86_64_elf_howto_table[r_type].name, |
961 | (h) ? h->root.root.string : "a local symbol"); | |
1b71fb54 | 962 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 963 | return FALSE; |
1b71fb54 AJ |
964 | } |
965 | /* Fall through. */ | |
966 | ||
c434dee6 AJ |
967 | case R_X86_64_PC8: |
968 | case R_X86_64_PC16: | |
70256ad8 | 969 | case R_X86_64_PC32: |
d6ab8113 | 970 | case R_X86_64_PC64: |
1b71fb54 | 971 | case R_X86_64_64: |
c434dee6 AJ |
972 | if (h != NULL && !info->shared) |
973 | { | |
974 | /* If this reloc is in a read-only section, we might | |
975 | need a copy reloc. We can't check reliably at this | |
976 | stage whether the section is read-only, as input | |
977 | sections have not yet been mapped to output sections. | |
978 | Tentatively set the flag for now, and correct in | |
979 | adjust_dynamic_symbol. */ | |
f5385ebf | 980 | h->non_got_ref = 1; |
c434dee6 AJ |
981 | |
982 | /* We may need a .plt entry if the function this reloc | |
983 | refers to is in a shared lib. */ | |
984 | h->plt.refcount += 1; | |
d6ab8113 | 985 | if (r_type != R_X86_64_PC32 && r_type != R_X86_64_PC64) |
f5385ebf | 986 | h->pointer_equality_needed = 1; |
c434dee6 | 987 | } |
70256ad8 AJ |
988 | |
989 | /* If we are creating a shared library, and this is a reloc | |
990 | against a global symbol, or a non PC relative reloc | |
991 | against a local symbol, then we need to copy the reloc | |
992 | into the shared library. However, if we are linking with | |
993 | -Bsymbolic, we do not need to copy a reloc against a | |
994 | global symbol which is defined in an object we are | |
407443a3 | 995 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
996 | this point we have not seen all the input files, so it is |
997 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
998 | later (it is never cleared). In case of a weak definition, |
999 | DEF_REGULAR may be cleared later by a strong definition in | |
1000 | a shared library. We account for that possibility below by | |
1001 | storing information in the relocs_copied field of the hash | |
1002 | table entry. A similar situation occurs when creating | |
1003 | shared libraries and symbol visibility changes render the | |
1004 | symbol local. | |
1005 | ||
1006 | If on the other hand, we are creating an executable, we | |
1007 | may need to keep relocations for symbols satisfied by a | |
1008 | dynamic library if we manage to avoid copy relocs for the | |
1009 | symbol. */ | |
1010 | if ((info->shared | |
1011 | && (sec->flags & SEC_ALLOC) != 0 | |
bffbf940 JJ |
1012 | && (((r_type != R_X86_64_PC8) |
1013 | && (r_type != R_X86_64_PC16) | |
d6ab8113 JB |
1014 | && (r_type != R_X86_64_PC32) |
1015 | && (r_type != R_X86_64_PC64)) | |
c434dee6 | 1016 | || (h != NULL |
55255dae | 1017 | && (! SYMBOLIC_BIND (info, h) |
c434dee6 | 1018 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1019 | || !h->def_regular)))) |
d40d037c AJ |
1020 | || (ELIMINATE_COPY_RELOCS |
1021 | && !info->shared | |
c434dee6 AJ |
1022 | && (sec->flags & SEC_ALLOC) != 0 |
1023 | && h != NULL | |
1024 | && (h->root.type == bfd_link_hash_defweak | |
f5385ebf | 1025 | || !h->def_regular))) |
70256ad8 | 1026 | { |
c434dee6 AJ |
1027 | struct elf64_x86_64_dyn_relocs *p; |
1028 | struct elf64_x86_64_dyn_relocs **head; | |
1029 | ||
1030 | /* We must copy these reloc types into the output file. | |
1031 | Create a reloc section in dynobj and make room for | |
1032 | this reloc. */ | |
70256ad8 AJ |
1033 | if (sreloc == NULL) |
1034 | { | |
1035 | const char *name; | |
c434dee6 | 1036 | bfd *dynobj; |
70256ad8 AJ |
1037 | |
1038 | name = (bfd_elf_string_from_elf_section | |
1039 | (abfd, | |
1040 | elf_elfheader (abfd)->e_shstrndx, | |
1041 | elf_section_data (sec)->rel_hdr.sh_name)); | |
1042 | if (name == NULL) | |
b34976b6 | 1043 | return FALSE; |
70256ad8 | 1044 | |
0112cd26 | 1045 | if (! CONST_STRNEQ (name, ".rela") |
c434dee6 AJ |
1046 | || strcmp (bfd_get_section_name (abfd, sec), |
1047 | name + 5) != 0) | |
1048 | { | |
1049 | (*_bfd_error_handler) | |
d003868e AM |
1050 | (_("%B: bad relocation section name `%s\'"), |
1051 | abfd, name); | |
c434dee6 AJ |
1052 | } |
1053 | ||
1054 | if (htab->elf.dynobj == NULL) | |
1055 | htab->elf.dynobj = abfd; | |
1056 | ||
1057 | dynobj = htab->elf.dynobj; | |
70256ad8 AJ |
1058 | |
1059 | sreloc = bfd_get_section_by_name (dynobj, name); | |
1060 | if (sreloc == NULL) | |
1061 | { | |
1062 | flagword flags; | |
1063 | ||
70256ad8 AJ |
1064 | flags = (SEC_HAS_CONTENTS | SEC_READONLY |
1065 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
1066 | if ((sec->flags & SEC_ALLOC) != 0) | |
1067 | flags |= SEC_ALLOC | SEC_LOAD; | |
3496cb2a L |
1068 | sreloc = bfd_make_section_with_flags (dynobj, |
1069 | name, | |
1070 | flags); | |
70256ad8 | 1071 | if (sreloc == NULL |
cc78d0af | 1072 | || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
b34976b6 | 1073 | return FALSE; |
70256ad8 | 1074 | } |
c434dee6 | 1075 | elf_section_data (sec)->sreloc = sreloc; |
70256ad8 AJ |
1076 | } |
1077 | ||
c434dee6 AJ |
1078 | /* If this is a global symbol, we count the number of |
1079 | relocations we need for this symbol. */ | |
1080 | if (h != NULL) | |
70256ad8 | 1081 | { |
c434dee6 AJ |
1082 | head = &((struct elf64_x86_64_link_hash_entry *) h)->dyn_relocs; |
1083 | } | |
1084 | else | |
1085 | { | |
e81d3500 | 1086 | void **vpp; |
c434dee6 AJ |
1087 | /* Track dynamic relocs needed for local syms too. |
1088 | We really need local syms available to do this | |
1089 | easily. Oh well. */ | |
1090 | ||
1091 | asection *s; | |
1092 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
1093 | sec, r_symndx); | |
1094 | if (s == NULL) | |
b34976b6 | 1095 | return FALSE; |
70256ad8 | 1096 | |
e81d3500 DD |
1097 | /* Beware of type punned pointers vs strict aliasing |
1098 | rules. */ | |
1099 | vpp = &(elf_section_data (s)->local_dynrel); | |
1100 | head = (struct elf64_x86_64_dyn_relocs **)vpp; | |
c434dee6 | 1101 | } |
70256ad8 | 1102 | |
c434dee6 AJ |
1103 | p = *head; |
1104 | if (p == NULL || p->sec != sec) | |
1105 | { | |
1106 | bfd_size_type amt = sizeof *p; | |
1107 | p = ((struct elf64_x86_64_dyn_relocs *) | |
1108 | bfd_alloc (htab->elf.dynobj, amt)); | |
70256ad8 | 1109 | if (p == NULL) |
b34976b6 | 1110 | return FALSE; |
c434dee6 AJ |
1111 | p->next = *head; |
1112 | *head = p; | |
1113 | p->sec = sec; | |
1114 | p->count = 0; | |
1115 | p->pc_count = 0; | |
70256ad8 | 1116 | } |
c434dee6 AJ |
1117 | |
1118 | p->count += 1; | |
bffbf940 JJ |
1119 | if (r_type == R_X86_64_PC8 |
1120 | || r_type == R_X86_64_PC16 | |
d6ab8113 JB |
1121 | || r_type == R_X86_64_PC32 |
1122 | || r_type == R_X86_64_PC64) | |
c434dee6 | 1123 | p->pc_count += 1; |
70256ad8 AJ |
1124 | } |
1125 | break; | |
fe4770f4 AJ |
1126 | |
1127 | /* This relocation describes the C++ object vtable hierarchy. | |
1128 | Reconstruct it for later use during GC. */ | |
1129 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 1130 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 1131 | return FALSE; |
fe4770f4 AJ |
1132 | break; |
1133 | ||
1134 | /* This relocation describes which C++ vtable entries are actually | |
1135 | used. Record for later use during GC. */ | |
1136 | case R_X86_64_GNU_VTENTRY: | |
c152c796 | 1137 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
b34976b6 | 1138 | return FALSE; |
fe4770f4 | 1139 | break; |
c434dee6 AJ |
1140 | |
1141 | default: | |
1142 | break; | |
70256ad8 AJ |
1143 | } |
1144 | } | |
1145 | ||
b34976b6 | 1146 | return TRUE; |
70256ad8 AJ |
1147 | } |
1148 | ||
1149 | /* Return the section that should be marked against GC for a given | |
407443a3 | 1150 | relocation. */ |
70256ad8 AJ |
1151 | |
1152 | static asection * | |
27482721 | 1153 | elf64_x86_64_gc_mark_hook (asection *sec, |
07adf181 | 1154 | struct bfd_link_info *info, |
27482721 AJ |
1155 | Elf_Internal_Rela *rel, |
1156 | struct elf_link_hash_entry *h, | |
1157 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
1158 | { |
1159 | if (h != NULL) | |
07adf181 AM |
1160 | switch (ELF64_R_TYPE (rel->r_info)) |
1161 | { | |
1162 | case R_X86_64_GNU_VTINHERIT: | |
1163 | case R_X86_64_GNU_VTENTRY: | |
1164 | return NULL; | |
1165 | } | |
1166 | ||
1167 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
1168 | } |
1169 | ||
407443a3 | 1170 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 | 1171 | |
b34976b6 | 1172 | static bfd_boolean |
27482721 AJ |
1173 | elf64_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, |
1174 | asection *sec, const Elf_Internal_Rela *relocs) | |
70256ad8 AJ |
1175 | { |
1176 | Elf_Internal_Shdr *symtab_hdr; | |
1177 | struct elf_link_hash_entry **sym_hashes; | |
1178 | bfd_signed_vma *local_got_refcounts; | |
1179 | const Elf_Internal_Rela *rel, *relend; | |
c434dee6 AJ |
1180 | |
1181 | elf_section_data (sec)->local_dynrel = NULL; | |
70256ad8 AJ |
1182 | |
1183 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1184 | sym_hashes = elf_sym_hashes (abfd); | |
1185 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1186 | ||
70256ad8 AJ |
1187 | relend = relocs + sec->reloc_count; |
1188 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
1189 | { |
1190 | unsigned long r_symndx; | |
1191 | unsigned int r_type; | |
1192 | struct elf_link_hash_entry *h = NULL; | |
70256ad8 | 1193 | |
26e41594 AM |
1194 | r_symndx = ELF64_R_SYM (rel->r_info); |
1195 | if (r_symndx >= symtab_hdr->sh_info) | |
1196 | { | |
1197 | struct elf64_x86_64_link_hash_entry *eh; | |
1198 | struct elf64_x86_64_dyn_relocs **pp; | |
1199 | struct elf64_x86_64_dyn_relocs *p; | |
c434dee6 | 1200 | |
26e41594 | 1201 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1202 | while (h->root.type == bfd_link_hash_indirect |
1203 | || h->root.type == bfd_link_hash_warning) | |
1204 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1205 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
c434dee6 | 1206 | |
26e41594 AM |
1207 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1208 | if (p->sec == sec) | |
1209 | { | |
1210 | /* Everything must go for SEC. */ | |
1211 | *pp = p->next; | |
1212 | break; | |
1213 | } | |
1214 | } | |
c434dee6 | 1215 | |
26e41594 AM |
1216 | r_type = ELF64_R_TYPE (rel->r_info); |
1217 | r_type = elf64_x86_64_tls_transition (info, r_type, h != NULL); | |
1218 | switch (r_type) | |
1219 | { | |
1220 | case R_X86_64_TLSLD: | |
1221 | if (elf64_x86_64_hash_table (info)->tls_ld_got.refcount > 0) | |
1222 | elf64_x86_64_hash_table (info)->tls_ld_got.refcount -= 1; | |
1223 | break; | |
c434dee6 | 1224 | |
26e41594 | 1225 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
1226 | case R_X86_64_GOTPC32_TLSDESC: |
1227 | case R_X86_64_TLSDESC_CALL: | |
26e41594 AM |
1228 | case R_X86_64_GOTTPOFF: |
1229 | case R_X86_64_GOT32: | |
1230 | case R_X86_64_GOTPCREL: | |
7b81dfbb AJ |
1231 | case R_X86_64_GOT64: |
1232 | case R_X86_64_GOTPCREL64: | |
1233 | case R_X86_64_GOTPLT64: | |
26e41594 AM |
1234 | if (h != NULL) |
1235 | { | |
7b81dfbb AJ |
1236 | if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0) |
1237 | h->plt.refcount -= 1; | |
26e41594 AM |
1238 | if (h->got.refcount > 0) |
1239 | h->got.refcount -= 1; | |
1240 | } | |
1241 | else if (local_got_refcounts != NULL) | |
1242 | { | |
1243 | if (local_got_refcounts[r_symndx] > 0) | |
1244 | local_got_refcounts[r_symndx] -= 1; | |
1245 | } | |
1246 | break; | |
c434dee6 | 1247 | |
26e41594 AM |
1248 | case R_X86_64_8: |
1249 | case R_X86_64_16: | |
1250 | case R_X86_64_32: | |
1251 | case R_X86_64_64: | |
1252 | case R_X86_64_32S: | |
1253 | case R_X86_64_PC8: | |
1254 | case R_X86_64_PC16: | |
1255 | case R_X86_64_PC32: | |
d6ab8113 | 1256 | case R_X86_64_PC64: |
26e41594 AM |
1257 | if (info->shared) |
1258 | break; | |
1259 | /* Fall thru */ | |
c434dee6 | 1260 | |
26e41594 | 1261 | case R_X86_64_PLT32: |
7b81dfbb | 1262 | case R_X86_64_PLTOFF64: |
26e41594 AM |
1263 | if (h != NULL) |
1264 | { | |
1265 | if (h->plt.refcount > 0) | |
1266 | h->plt.refcount -= 1; | |
1267 | } | |
1268 | break; | |
70256ad8 | 1269 | |
26e41594 AM |
1270 | default: |
1271 | break; | |
1272 | } | |
1273 | } | |
70256ad8 | 1274 | |
b34976b6 | 1275 | return TRUE; |
70256ad8 AJ |
1276 | } |
1277 | ||
1278 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1279 | regular object. The current definition is in some section of the | |
1280 | dynamic object, but we're not including those sections. We have to | |
1281 | change the definition to something the rest of the link can | |
407443a3 | 1282 | understand. */ |
70256ad8 | 1283 | |
b34976b6 | 1284 | static bfd_boolean |
27482721 AJ |
1285 | elf64_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
1286 | struct elf_link_hash_entry *h) | |
70256ad8 | 1287 | { |
c434dee6 | 1288 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1289 | asection *s; |
1290 | unsigned int power_of_two; | |
1291 | ||
70256ad8 AJ |
1292 | /* If this is a function, put it in the procedure linkage table. We |
1293 | will fill in the contents of the procedure linkage table later, | |
1294 | when we know the address of the .got section. */ | |
1295 | if (h->type == STT_FUNC | |
f5385ebf | 1296 | || h->needs_plt) |
70256ad8 | 1297 | { |
c434dee6 | 1298 | if (h->plt.refcount <= 0 |
27482721 AJ |
1299 | || SYMBOL_CALLS_LOCAL (info, h) |
1300 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1301 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 1302 | { |
70256ad8 AJ |
1303 | /* This case can occur if we saw a PLT32 reloc in an input |
1304 | file, but the symbol was never referred to by a dynamic | |
1305 | object, or if all references were garbage collected. In | |
1306 | such a case, we don't actually need to build a procedure | |
1307 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 1308 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 1309 | h->needs_plt = 0; |
70256ad8 AJ |
1310 | } |
1311 | ||
b34976b6 | 1312 | return TRUE; |
70256ad8 | 1313 | } |
bbd7ec4a | 1314 | else |
c434dee6 AJ |
1315 | /* It's possible that we incorrectly decided a .plt reloc was |
1316 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
1317 | check_relocs. We can't decide accurately between function and | |
1318 | non-function syms in check-relocs; Objects loaded later in | |
1319 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1320 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
1321 | |
1322 | /* If this is a weak symbol, and there is a real definition, the | |
1323 | processor independent code will have arranged for us to see the | |
407443a3 | 1324 | real definition first, and we can just use the same value. */ |
f6e332e6 | 1325 | if (h->u.weakdef != NULL) |
70256ad8 | 1326 | { |
f6e332e6 AM |
1327 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1328 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1329 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1330 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 1331 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 1332 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 1333 | return TRUE; |
70256ad8 AJ |
1334 | } |
1335 | ||
1336 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 1337 | is not a function. */ |
70256ad8 AJ |
1338 | |
1339 | /* If we are creating a shared library, we must presume that the | |
1340 | only references to the symbol are via the global offset table. | |
1341 | For such cases we need not do anything here; the relocations will | |
407443a3 | 1342 | be handled correctly by relocate_section. */ |
70256ad8 | 1343 | if (info->shared) |
b34976b6 | 1344 | return TRUE; |
70256ad8 AJ |
1345 | |
1346 | /* If there are no references to this symbol that do not use the | |
1347 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 1348 | if (!h->non_got_ref) |
b34976b6 | 1349 | return TRUE; |
70256ad8 | 1350 | |
c434dee6 AJ |
1351 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1352 | if (info->nocopyreloc) | |
1353 | { | |
f5385ebf | 1354 | h->non_got_ref = 0; |
b34976b6 | 1355 | return TRUE; |
c434dee6 AJ |
1356 | } |
1357 | ||
d40d037c | 1358 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 1359 | { |
d40d037c AJ |
1360 | struct elf64_x86_64_link_hash_entry * eh; |
1361 | struct elf64_x86_64_dyn_relocs *p; | |
c434dee6 | 1362 | |
d40d037c AJ |
1363 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
1364 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1365 | { | |
1366 | s = p->sec->output_section; | |
1367 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1368 | break; | |
1369 | } | |
1370 | ||
1371 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1372 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1373 | if (p == NULL) | |
1374 | { | |
f5385ebf | 1375 | h->non_got_ref = 0; |
d40d037c AJ |
1376 | return TRUE; |
1377 | } | |
c434dee6 AJ |
1378 | } |
1379 | ||
909272ee AM |
1380 | if (h->size == 0) |
1381 | { | |
1382 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), | |
1383 | h->root.root.string); | |
1384 | return TRUE; | |
1385 | } | |
1386 | ||
70256ad8 | 1387 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 1388 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
1389 | an entry for this symbol in the .dynsym section. The dynamic |
1390 | object will contain position independent code, so all references | |
1391 | from the dynamic object to this symbol will go through the global | |
1392 | offset table. The dynamic linker will use the .dynsym entry to | |
1393 | determine the address it must put in the global offset table, so | |
1394 | both the dynamic object and the regular object will refer to the | |
1395 | same memory location for the variable. */ | |
1396 | ||
c434dee6 | 1397 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
1398 | |
1399 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
1400 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 1401 | runtime process image. */ |
70256ad8 AJ |
1402 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1403 | { | |
eea6121a | 1404 | htab->srelbss->size += sizeof (Elf64_External_Rela); |
f5385ebf | 1405 | h->needs_copy = 1; |
70256ad8 AJ |
1406 | } |
1407 | ||
1408 | /* We need to figure out the alignment required for this symbol. I | |
407443a3 | 1409 | have no idea how ELF linkers handle this. 16-bytes is the size |
70256ad8 AJ |
1410 | of the largest type that requires hard alignment -- long double. */ |
1411 | /* FIXME: This is VERY ugly. Should be fixed for all architectures using | |
1412 | this construct. */ | |
1413 | power_of_two = bfd_log2 (h->size); | |
1414 | if (power_of_two > 4) | |
1415 | power_of_two = 4; | |
1416 | ||
1417 | /* Apply the required alignment. */ | |
c434dee6 | 1418 | s = htab->sdynbss; |
eea6121a | 1419 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); |
c434dee6 | 1420 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) |
70256ad8 | 1421 | { |
c434dee6 | 1422 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
b34976b6 | 1423 | return FALSE; |
70256ad8 AJ |
1424 | } |
1425 | ||
1426 | /* Define the symbol as being at this point in the section. */ | |
1427 | h->root.u.def.section = s; | |
eea6121a | 1428 | h->root.u.def.value = s->size; |
70256ad8 AJ |
1429 | |
1430 | /* Increment the section size to make room for the symbol. */ | |
eea6121a | 1431 | s->size += h->size; |
70256ad8 | 1432 | |
b34976b6 | 1433 | return TRUE; |
70256ad8 AJ |
1434 | } |
1435 | ||
c434dee6 AJ |
1436 | /* Allocate space in .plt, .got and associated reloc sections for |
1437 | dynamic relocs. */ | |
1438 | ||
b34976b6 | 1439 | static bfd_boolean |
27482721 | 1440 | allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
1441 | { |
1442 | struct bfd_link_info *info; | |
1443 | struct elf64_x86_64_link_hash_table *htab; | |
1444 | struct elf64_x86_64_link_hash_entry *eh; | |
1445 | struct elf64_x86_64_dyn_relocs *p; | |
1446 | ||
e92d460e | 1447 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1448 | return TRUE; |
c434dee6 | 1449 | |
e92d460e AM |
1450 | if (h->root.type == bfd_link_hash_warning) |
1451 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1452 | ||
c434dee6 AJ |
1453 | info = (struct bfd_link_info *) inf; |
1454 | htab = elf64_x86_64_hash_table (info); | |
1455 | ||
1456 | if (htab->elf.dynamic_sections_created | |
27482721 | 1457 | && h->plt.refcount > 0) |
c434dee6 AJ |
1458 | { |
1459 | /* Make sure this symbol is output as a dynamic symbol. | |
1460 | Undefined weak syms won't yet be marked as dynamic. */ | |
1461 | if (h->dynindx == -1 | |
f5385ebf | 1462 | && !h->forced_local) |
c434dee6 | 1463 | { |
c152c796 | 1464 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1465 | return FALSE; |
c434dee6 AJ |
1466 | } |
1467 | ||
27482721 AJ |
1468 | if (info->shared |
1469 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
c434dee6 AJ |
1470 | { |
1471 | asection *s = htab->splt; | |
1472 | ||
1473 | /* If this is the first .plt entry, make room for the special | |
1474 | first entry. */ | |
eea6121a AM |
1475 | if (s->size == 0) |
1476 | s->size += PLT_ENTRY_SIZE; | |
c434dee6 | 1477 | |
eea6121a | 1478 | h->plt.offset = s->size; |
c434dee6 AJ |
1479 | |
1480 | /* If this symbol is not defined in a regular file, and we are | |
1481 | not generating a shared library, then set the symbol to this | |
1482 | location in the .plt. This is required to make function | |
1483 | pointers compare as equal between the normal executable and | |
1484 | the shared library. */ | |
1485 | if (! info->shared | |
f5385ebf | 1486 | && !h->def_regular) |
c434dee6 AJ |
1487 | { |
1488 | h->root.u.def.section = s; | |
1489 | h->root.u.def.value = h->plt.offset; | |
1490 | } | |
1491 | ||
1492 | /* Make room for this entry. */ | |
eea6121a | 1493 | s->size += PLT_ENTRY_SIZE; |
c434dee6 AJ |
1494 | |
1495 | /* We also need to make an entry in the .got.plt section, which | |
1496 | will be placed in the .got section by the linker script. */ | |
eea6121a | 1497 | htab->sgotplt->size += GOT_ENTRY_SIZE; |
c434dee6 AJ |
1498 | |
1499 | /* We also need to make an entry in the .rela.plt section. */ | |
eea6121a | 1500 | htab->srelplt->size += sizeof (Elf64_External_Rela); |
67a4f2b7 | 1501 | htab->srelplt->reloc_count++; |
c434dee6 AJ |
1502 | } |
1503 | else | |
1504 | { | |
1505 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1506 | h->needs_plt = 0; |
c434dee6 AJ |
1507 | } |
1508 | } | |
1509 | else | |
1510 | { | |
1511 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1512 | h->needs_plt = 0; |
c434dee6 AJ |
1513 | } |
1514 | ||
67a4f2b7 AO |
1515 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
1516 | eh->tlsdesc_got = (bfd_vma) -1; | |
1517 | ||
bffbf940 JJ |
1518 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
1519 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
1520 | if (h->got.refcount > 0 | |
1521 | && !info->shared | |
1522 | && h->dynindx == -1 | |
1523 | && elf64_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) | |
1524 | h->got.offset = (bfd_vma) -1; | |
1525 | else if (h->got.refcount > 0) | |
c434dee6 AJ |
1526 | { |
1527 | asection *s; | |
b34976b6 | 1528 | bfd_boolean dyn; |
bffbf940 | 1529 | int tls_type = elf64_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
1530 | |
1531 | /* Make sure this symbol is output as a dynamic symbol. | |
1532 | Undefined weak syms won't yet be marked as dynamic. */ | |
1533 | if (h->dynindx == -1 | |
f5385ebf | 1534 | && !h->forced_local) |
c434dee6 | 1535 | { |
c152c796 | 1536 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1537 | return FALSE; |
c434dee6 AJ |
1538 | } |
1539 | ||
67a4f2b7 AO |
1540 | if (GOT_TLS_GDESC_P (tls_type)) |
1541 | { | |
1542 | eh->tlsdesc_got = htab->sgotplt->size | |
1543 | - elf64_x86_64_compute_jump_table_size (htab); | |
1544 | htab->sgotplt->size += 2 * GOT_ENTRY_SIZE; | |
1545 | h->got.offset = (bfd_vma) -2; | |
1546 | } | |
1547 | if (! GOT_TLS_GDESC_P (tls_type) | |
1548 | || GOT_TLS_GD_P (tls_type)) | |
1549 | { | |
1550 | s = htab->sgot; | |
1551 | h->got.offset = s->size; | |
1552 | s->size += GOT_ENTRY_SIZE; | |
1553 | if (GOT_TLS_GD_P (tls_type)) | |
1554 | s->size += GOT_ENTRY_SIZE; | |
1555 | } | |
c434dee6 | 1556 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 JJ |
1557 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
1558 | and two if global. | |
1559 | R_X86_64_GOTTPOFF needs one dynamic relocation. */ | |
67a4f2b7 | 1560 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 1561 | || tls_type == GOT_TLS_IE) |
eea6121a | 1562 | htab->srelgot->size += sizeof (Elf64_External_Rela); |
67a4f2b7 | 1563 | else if (GOT_TLS_GD_P (tls_type)) |
eea6121a | 1564 | htab->srelgot->size += 2 * sizeof (Elf64_External_Rela); |
67a4f2b7 AO |
1565 | else if (! GOT_TLS_GDESC_P (tls_type) |
1566 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1567 | || h->root.type != bfd_link_hash_undefweak) | |
27482721 AJ |
1568 | && (info->shared |
1569 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
eea6121a | 1570 | htab->srelgot->size += sizeof (Elf64_External_Rela); |
67a4f2b7 AO |
1571 | if (GOT_TLS_GDESC_P (tls_type)) |
1572 | { | |
1573 | htab->srelplt->size += sizeof (Elf64_External_Rela); | |
1574 | htab->tlsdesc_plt = (bfd_vma) -1; | |
1575 | } | |
c434dee6 AJ |
1576 | } |
1577 | else | |
1578 | h->got.offset = (bfd_vma) -1; | |
1579 | ||
c434dee6 | 1580 | if (eh->dyn_relocs == NULL) |
b34976b6 | 1581 | return TRUE; |
c434dee6 AJ |
1582 | |
1583 | /* In the shared -Bsymbolic case, discard space allocated for | |
1584 | dynamic pc-relative relocs against symbols which turn out to be | |
1585 | defined in regular objects. For the normal shared case, discard | |
1586 | space for pc-relative relocs that have become local due to symbol | |
1587 | visibility changes. */ | |
1588 | ||
1589 | if (info->shared) | |
1590 | { | |
27482721 AJ |
1591 | /* Relocs that use pc_count are those that appear on a call |
1592 | insn, or certain REL relocs that can generated via assembly. | |
1593 | We want calls to protected symbols to resolve directly to the | |
1594 | function rather than going via the plt. If people want | |
1595 | function pointer comparisons to work as expected then they | |
1596 | should avoid writing weird assembly. */ | |
1597 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 AJ |
1598 | { |
1599 | struct elf64_x86_64_dyn_relocs **pp; | |
1600 | ||
1601 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1602 | { | |
1603 | p->count -= p->pc_count; | |
1604 | p->pc_count = 0; | |
1605 | if (p->count == 0) | |
1606 | *pp = p->next; | |
1607 | else | |
1608 | pp = &p->next; | |
1609 | } | |
1610 | } | |
4e795f50 AM |
1611 | |
1612 | /* Also discard relocs on undefined weak syms with non-default | |
1613 | visibility. */ | |
22d606e9 | 1614 | if (eh->dyn_relocs != NULL |
4e795f50 | 1615 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
1616 | { |
1617 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
1618 | eh->dyn_relocs = NULL; | |
1619 | ||
1620 | /* Make sure undefined weak symbols are output as a dynamic | |
1621 | symbol in PIEs. */ | |
1622 | else if (h->dynindx == -1 | |
1623 | && !h->forced_local) | |
1624 | { | |
1625 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
1626 | return FALSE; | |
1627 | } | |
1628 | } | |
c434dee6 | 1629 | } |
d40d037c | 1630 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
1631 | { |
1632 | /* For the non-shared case, discard space for relocs against | |
1633 | symbols which turn out to need copy relocs or are not | |
1634 | dynamic. */ | |
1635 | ||
f5385ebf AM |
1636 | if (!h->non_got_ref |
1637 | && ((h->def_dynamic | |
1638 | && !h->def_regular) | |
c434dee6 AJ |
1639 | || (htab->elf.dynamic_sections_created |
1640 | && (h->root.type == bfd_link_hash_undefweak | |
1641 | || h->root.type == bfd_link_hash_undefined)))) | |
1642 | { | |
1643 | /* Make sure this symbol is output as a dynamic symbol. | |
1644 | Undefined weak syms won't yet be marked as dynamic. */ | |
1645 | if (h->dynindx == -1 | |
f5385ebf | 1646 | && !h->forced_local) |
c434dee6 | 1647 | { |
c152c796 | 1648 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1649 | return FALSE; |
c434dee6 AJ |
1650 | } |
1651 | ||
1652 | /* If that succeeded, we know we'll be keeping all the | |
1653 | relocs. */ | |
1654 | if (h->dynindx != -1) | |
1655 | goto keep; | |
1656 | } | |
1657 | ||
1658 | eh->dyn_relocs = NULL; | |
1659 | ||
1660 | keep: ; | |
1661 | } | |
1662 | ||
1663 | /* Finally, allocate space. */ | |
1664 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1665 | { | |
1666 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
eea6121a | 1667 | sreloc->size += p->count * sizeof (Elf64_External_Rela); |
c434dee6 AJ |
1668 | } |
1669 | ||
b34976b6 | 1670 | return TRUE; |
c434dee6 AJ |
1671 | } |
1672 | ||
1673 | /* Find any dynamic relocs that apply to read-only sections. */ | |
1674 | ||
b34976b6 | 1675 | static bfd_boolean |
27482721 | 1676 | readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
1677 | { |
1678 | struct elf64_x86_64_link_hash_entry *eh; | |
1679 | struct elf64_x86_64_dyn_relocs *p; | |
1680 | ||
e92d460e AM |
1681 | if (h->root.type == bfd_link_hash_warning) |
1682 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1683 | ||
c434dee6 AJ |
1684 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
1685 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1686 | { | |
1687 | asection *s = p->sec->output_section; | |
1688 | ||
1689 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1690 | { | |
1691 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1692 | ||
1693 | info->flags |= DF_TEXTREL; | |
1694 | ||
1695 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 1696 | return FALSE; |
c434dee6 AJ |
1697 | } |
1698 | } | |
b34976b6 | 1699 | return TRUE; |
c434dee6 AJ |
1700 | } |
1701 | ||
70256ad8 AJ |
1702 | /* Set the sizes of the dynamic sections. */ |
1703 | ||
b34976b6 | 1704 | static bfd_boolean |
27482721 AJ |
1705 | elf64_x86_64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
1706 | struct bfd_link_info *info) | |
70256ad8 | 1707 | { |
c434dee6 | 1708 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1709 | bfd *dynobj; |
1710 | asection *s; | |
b34976b6 | 1711 | bfd_boolean relocs; |
c434dee6 | 1712 | bfd *ibfd; |
70256ad8 | 1713 | |
c434dee6 AJ |
1714 | htab = elf64_x86_64_hash_table (info); |
1715 | dynobj = htab->elf.dynobj; | |
1716 | if (dynobj == NULL) | |
1717 | abort (); | |
70256ad8 | 1718 | |
c434dee6 | 1719 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
1720 | { |
1721 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 1722 | if (info->executable) |
70256ad8 AJ |
1723 | { |
1724 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
c434dee6 AJ |
1725 | if (s == NULL) |
1726 | abort (); | |
eea6121a | 1727 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
70256ad8 AJ |
1728 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1729 | } | |
1730 | } | |
70256ad8 | 1731 | |
c434dee6 AJ |
1732 | /* Set up .got offsets for local syms, and space for local dynamic |
1733 | relocs. */ | |
1734 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
70256ad8 | 1735 | { |
c434dee6 AJ |
1736 | bfd_signed_vma *local_got; |
1737 | bfd_signed_vma *end_local_got; | |
bffbf940 | 1738 | char *local_tls_type; |
67a4f2b7 | 1739 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
1740 | bfd_size_type locsymcount; |
1741 | Elf_Internal_Shdr *symtab_hdr; | |
1742 | asection *srel; | |
70256ad8 | 1743 | |
c434dee6 | 1744 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
70256ad8 AJ |
1745 | continue; |
1746 | ||
c434dee6 | 1747 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 1748 | { |
c434dee6 AJ |
1749 | struct elf64_x86_64_dyn_relocs *p; |
1750 | ||
e81d3500 DD |
1751 | for (p = (struct elf64_x86_64_dyn_relocs *) |
1752 | (elf_section_data (s)->local_dynrel); | |
c434dee6 AJ |
1753 | p != NULL; |
1754 | p = p->next) | |
70256ad8 | 1755 | { |
c434dee6 AJ |
1756 | if (!bfd_is_abs_section (p->sec) |
1757 | && bfd_is_abs_section (p->sec->output_section)) | |
1758 | { | |
1759 | /* Input section has been discarded, either because | |
1760 | it is a copy of a linkonce section or due to | |
1761 | linker script /DISCARD/, so we'll be discarding | |
1762 | the relocs too. */ | |
1763 | } | |
1764 | else if (p->count != 0) | |
1765 | { | |
1766 | srel = elf_section_data (p->sec)->sreloc; | |
eea6121a | 1767 | srel->size += p->count * sizeof (Elf64_External_Rela); |
c434dee6 AJ |
1768 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
1769 | info->flags |= DF_TEXTREL; | |
1770 | ||
1771 | } | |
70256ad8 AJ |
1772 | } |
1773 | } | |
c434dee6 AJ |
1774 | |
1775 | local_got = elf_local_got_refcounts (ibfd); | |
1776 | if (!local_got) | |
1777 | continue; | |
1778 | ||
1779 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
1780 | locsymcount = symtab_hdr->sh_info; | |
1781 | end_local_got = local_got + locsymcount; | |
bffbf940 | 1782 | local_tls_type = elf64_x86_64_local_got_tls_type (ibfd); |
67a4f2b7 | 1783 | local_tlsdesc_gotent = elf64_x86_64_local_tlsdesc_gotent (ibfd); |
c434dee6 AJ |
1784 | s = htab->sgot; |
1785 | srel = htab->srelgot; | |
67a4f2b7 AO |
1786 | for (; local_got < end_local_got; |
1787 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 1788 | { |
67a4f2b7 | 1789 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 1790 | if (*local_got > 0) |
70256ad8 | 1791 | { |
67a4f2b7 AO |
1792 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
1793 | { | |
1794 | *local_tlsdesc_gotent = htab->sgotplt->size | |
1795 | - elf64_x86_64_compute_jump_table_size (htab); | |
1796 | htab->sgotplt->size += 2 * GOT_ENTRY_SIZE; | |
1797 | *local_got = (bfd_vma) -2; | |
1798 | } | |
1799 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
1800 | || GOT_TLS_GD_P (*local_tls_type)) | |
1801 | { | |
1802 | *local_got = s->size; | |
1803 | s->size += GOT_ENTRY_SIZE; | |
1804 | if (GOT_TLS_GD_P (*local_tls_type)) | |
1805 | s->size += GOT_ENTRY_SIZE; | |
1806 | } | |
bffbf940 | 1807 | if (info->shared |
67a4f2b7 | 1808 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 1809 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
1810 | { |
1811 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
1812 | { | |
1813 | htab->srelplt->size += sizeof (Elf64_External_Rela); | |
1814 | htab->tlsdesc_plt = (bfd_vma) -1; | |
1815 | } | |
1816 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
1817 | || GOT_TLS_GD_P (*local_tls_type)) | |
1818 | srel->size += sizeof (Elf64_External_Rela); | |
1819 | } | |
70256ad8 AJ |
1820 | } |
1821 | else | |
c434dee6 AJ |
1822 | *local_got = (bfd_vma) -1; |
1823 | } | |
1824 | } | |
70256ad8 | 1825 | |
bffbf940 JJ |
1826 | if (htab->tls_ld_got.refcount > 0) |
1827 | { | |
1828 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
1829 | relocs. */ | |
eea6121a AM |
1830 | htab->tls_ld_got.offset = htab->sgot->size; |
1831 | htab->sgot->size += 2 * GOT_ENTRY_SIZE; | |
1832 | htab->srelgot->size += sizeof (Elf64_External_Rela); | |
bffbf940 JJ |
1833 | } |
1834 | else | |
1835 | htab->tls_ld_got.offset = -1; | |
1836 | ||
c434dee6 AJ |
1837 | /* Allocate global sym .plt and .got entries, and space for global |
1838 | sym dynamic relocs. */ | |
1839 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); | |
1840 | ||
67a4f2b7 AO |
1841 | /* For every jump slot reserved in the sgotplt, reloc_count is |
1842 | incremented. However, when we reserve space for TLS descriptors, | |
1843 | it's not incremented, so in order to compute the space reserved | |
1844 | for them, it suffices to multiply the reloc count by the jump | |
1845 | slot size. */ | |
1846 | if (htab->srelplt) | |
1847 | htab->sgotplt_jump_table_size | |
1848 | = elf64_x86_64_compute_jump_table_size (htab); | |
1849 | ||
1850 | if (htab->tlsdesc_plt) | |
1851 | { | |
1852 | /* If we're not using lazy TLS relocations, don't generate the | |
1853 | PLT and GOT entries they require. */ | |
1854 | if ((info->flags & DF_BIND_NOW)) | |
1855 | htab->tlsdesc_plt = 0; | |
1856 | else | |
1857 | { | |
1858 | htab->tlsdesc_got = htab->sgot->size; | |
1859 | htab->sgot->size += GOT_ENTRY_SIZE; | |
1860 | /* Reserve room for the initial entry. | |
1861 | FIXME: we could probably do away with it in this case. */ | |
1862 | if (htab->splt->size == 0) | |
1863 | htab->splt->size += PLT_ENTRY_SIZE; | |
1864 | htab->tlsdesc_plt = htab->splt->size; | |
1865 | htab->splt->size += PLT_ENTRY_SIZE; | |
1866 | } | |
1867 | } | |
1868 | ||
c434dee6 AJ |
1869 | /* We now have determined the sizes of the various dynamic sections. |
1870 | Allocate memory for them. */ | |
b34976b6 | 1871 | relocs = FALSE; |
c434dee6 AJ |
1872 | for (s = dynobj->sections; s != NULL; s = s->next) |
1873 | { | |
1874 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1875 | continue; | |
1876 | ||
1877 | if (s == htab->splt | |
1878 | || s == htab->sgot | |
75ff4589 L |
1879 | || s == htab->sgotplt |
1880 | || s == htab->sdynbss) | |
c434dee6 AJ |
1881 | { |
1882 | /* Strip this section if we don't need it; see the | |
1883 | comment below. */ | |
1884 | } | |
0112cd26 | 1885 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 1886 | { |
eea6121a | 1887 | if (s->size != 0 && s != htab->srelplt) |
b34976b6 | 1888 | relocs = TRUE; |
c434dee6 AJ |
1889 | |
1890 | /* We use the reloc_count field as a counter if we need | |
1891 | to copy relocs into the output file. */ | |
67a4f2b7 AO |
1892 | if (s != htab->srelplt) |
1893 | s->reloc_count = 0; | |
70256ad8 | 1894 | } |
c434dee6 | 1895 | else |
70256ad8 AJ |
1896 | { |
1897 | /* It's not one of our sections, so don't allocate space. */ | |
1898 | continue; | |
1899 | } | |
1900 | ||
eea6121a | 1901 | if (s->size == 0) |
70256ad8 | 1902 | { |
c434dee6 AJ |
1903 | /* If we don't need this section, strip it from the |
1904 | output file. This is mostly to handle .rela.bss and | |
1905 | .rela.plt. We must create both sections in | |
1906 | create_dynamic_sections, because they must be created | |
1907 | before the linker maps input sections to output | |
1908 | sections. The linker does that before | |
1909 | adjust_dynamic_symbol is called, and it is that | |
1910 | function which decides whether anything needs to go | |
1911 | into these sections. */ | |
1912 | ||
8423293d | 1913 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
1914 | continue; |
1915 | } | |
1916 | ||
c456f082 AM |
1917 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
1918 | continue; | |
1919 | ||
70256ad8 AJ |
1920 | /* Allocate memory for the section contents. We use bfd_zalloc |
1921 | here in case unused entries are not reclaimed before the | |
1922 | section's contents are written out. This should not happen, | |
1923 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
1924 | of garbage. */ | |
eea6121a | 1925 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 1926 | if (s->contents == NULL) |
b34976b6 | 1927 | return FALSE; |
70256ad8 AJ |
1928 | } |
1929 | ||
c434dee6 | 1930 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
1931 | { |
1932 | /* Add some entries to the .dynamic section. We fill in the | |
1933 | values later, in elf64_x86_64_finish_dynamic_sections, but we | |
1934 | must add the entries now so that we get the correct size for | |
407443a3 | 1935 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 1936 | dynamic linker and used by the debugger. */ |
dc810e39 | 1937 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 1938 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 1939 | |
36af4a4e | 1940 | if (info->executable) |
70256ad8 | 1941 | { |
dc810e39 | 1942 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 1943 | return FALSE; |
70256ad8 AJ |
1944 | } |
1945 | ||
eea6121a | 1946 | if (htab->splt->size != 0) |
70256ad8 | 1947 | { |
dc810e39 AM |
1948 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
1949 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
1950 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
1951 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 1952 | return FALSE; |
67a4f2b7 AO |
1953 | |
1954 | if (htab->tlsdesc_plt | |
1955 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
1956 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
1957 | return FALSE; | |
70256ad8 AJ |
1958 | } |
1959 | ||
1960 | if (relocs) | |
1961 | { | |
dc810e39 AM |
1962 | if (!add_dynamic_entry (DT_RELA, 0) |
1963 | || !add_dynamic_entry (DT_RELASZ, 0) | |
1964 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
b34976b6 | 1965 | return FALSE; |
70256ad8 | 1966 | |
c434dee6 AJ |
1967 | /* If any dynamic relocs apply to a read-only section, |
1968 | then we need a DT_TEXTREL entry. */ | |
1969 | if ((info->flags & DF_TEXTREL) == 0) | |
1970 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
1971 | (PTR) info); | |
1972 | ||
1973 | if ((info->flags & DF_TEXTREL) != 0) | |
1974 | { | |
1975 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 1976 | return FALSE; |
c434dee6 | 1977 | } |
70256ad8 AJ |
1978 | } |
1979 | } | |
dc810e39 | 1980 | #undef add_dynamic_entry |
70256ad8 | 1981 | |
b34976b6 | 1982 | return TRUE; |
70256ad8 AJ |
1983 | } |
1984 | ||
67a4f2b7 AO |
1985 | static bfd_boolean |
1986 | elf64_x86_64_always_size_sections (bfd *output_bfd, | |
1987 | struct bfd_link_info *info) | |
1988 | { | |
1989 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
1990 | ||
1991 | if (tls_sec) | |
1992 | { | |
1993 | struct elf_link_hash_entry *tlsbase; | |
1994 | ||
1995 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
1996 | "_TLS_MODULE_BASE_", | |
1997 | FALSE, FALSE, FALSE); | |
1998 | ||
1999 | if (tlsbase && tlsbase->type == STT_TLS) | |
2000 | { | |
2001 | struct bfd_link_hash_entry *bh = NULL; | |
2002 | const struct elf_backend_data *bed | |
2003 | = get_elf_backend_data (output_bfd); | |
2004 | ||
2005 | if (!(_bfd_generic_link_add_one_symbol | |
2006 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
2007 | tls_sec, 0, NULL, FALSE, | |
2008 | bed->collect, &bh))) | |
2009 | return FALSE; | |
2010 | tlsbase = (struct elf_link_hash_entry *)bh; | |
2011 | tlsbase->def_regular = 1; | |
2012 | tlsbase->other = STV_HIDDEN; | |
2013 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
2014 | } | |
2015 | } | |
2016 | ||
2017 | return TRUE; | |
2018 | } | |
2019 | ||
bffbf940 JJ |
2020 | /* Return the base VMA address which should be subtracted from real addresses |
2021 | when resolving @dtpoff relocation. | |
2022 | This is PT_TLS segment p_vaddr. */ | |
2023 | ||
2024 | static bfd_vma | |
27482721 | 2025 | dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 2026 | { |
e1918d23 AM |
2027 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2028 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 2029 | return 0; |
e1918d23 | 2030 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
2031 | } |
2032 | ||
2033 | /* Return the relocation value for @tpoff relocation | |
2034 | if STT_TLS virtual address is ADDRESS. */ | |
2035 | ||
2036 | static bfd_vma | |
27482721 | 2037 | tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 2038 | { |
e1918d23 | 2039 | struct elf_link_hash_table *htab = elf_hash_table (info); |
bffbf940 JJ |
2040 | |
2041 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 2042 | if (htab->tls_sec == NULL) |
bffbf940 | 2043 | return 0; |
e1918d23 | 2044 | return address - htab->tls_size - htab->tls_sec->vma; |
bffbf940 JJ |
2045 | } |
2046 | ||
90f487df L |
2047 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
2048 | branch? */ | |
2049 | ||
2050 | static bfd_boolean | |
2051 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
2052 | { | |
2053 | /* Opcode Instruction | |
2054 | 0xe8 call | |
2055 | 0xe9 jump | |
2056 | 0x0f 0x8x conditional jump */ | |
2057 | return ((offset > 0 | |
2058 | && (contents [offset - 1] == 0xe8 | |
2059 | || contents [offset - 1] == 0xe9)) | |
2060 | || (offset > 1 | |
2061 | && contents [offset - 2] == 0x0f | |
2062 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
2063 | } | |
2064 | ||
8d88c4ca NC |
2065 | /* Relocate an x86_64 ELF section. */ |
2066 | ||
b34976b6 | 2067 | static bfd_boolean |
27482721 AJ |
2068 | elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info, |
2069 | bfd *input_bfd, asection *input_section, | |
2070 | bfd_byte *contents, Elf_Internal_Rela *relocs, | |
2071 | Elf_Internal_Sym *local_syms, | |
2072 | asection **local_sections) | |
8d88c4ca | 2073 | { |
c434dee6 | 2074 | struct elf64_x86_64_link_hash_table *htab; |
8d88c4ca NC |
2075 | Elf_Internal_Shdr *symtab_hdr; |
2076 | struct elf_link_hash_entry **sym_hashes; | |
2077 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2078 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 2079 | Elf_Internal_Rela *rel; |
8d88c4ca NC |
2080 | Elf_Internal_Rela *relend; |
2081 | ||
c434dee6 | 2082 | htab = elf64_x86_64_hash_table (info); |
8d88c4ca NC |
2083 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
2084 | sym_hashes = elf_sym_hashes (input_bfd); | |
2085 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
67a4f2b7 | 2086 | local_tlsdesc_gotents = elf64_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 2087 | |
c434dee6 | 2088 | rel = relocs; |
8d88c4ca | 2089 | relend = relocs + input_section->reloc_count; |
c434dee6 | 2090 | for (; rel < relend; rel++) |
8d88c4ca | 2091 | { |
bffbf940 | 2092 | unsigned int r_type; |
8d88c4ca NC |
2093 | reloc_howto_type *howto; |
2094 | unsigned long r_symndx; | |
2095 | struct elf_link_hash_entry *h; | |
2096 | Elf_Internal_Sym *sym; | |
2097 | asection *sec; | |
67a4f2b7 | 2098 | bfd_vma off, offplt; |
8d88c4ca | 2099 | bfd_vma relocation; |
b34976b6 | 2100 | bfd_boolean unresolved_reloc; |
8d88c4ca | 2101 | bfd_reloc_status_type r; |
bffbf940 | 2102 | int tls_type; |
8d88c4ca | 2103 | |
c434dee6 | 2104 | r_type = ELF64_R_TYPE (rel->r_info); |
fe4770f4 AJ |
2105 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
2106 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
2107 | continue; | |
8d88c4ca | 2108 | |
bffbf940 | 2109 | if (r_type >= R_X86_64_max) |
8da6118f KH |
2110 | { |
2111 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2112 | return FALSE; |
8da6118f | 2113 | } |
8d88c4ca | 2114 | |
b491616a | 2115 | howto = x86_64_elf_howto_table + r_type; |
c434dee6 | 2116 | r_symndx = ELF64_R_SYM (rel->r_info); |
8d88c4ca NC |
2117 | h = NULL; |
2118 | sym = NULL; | |
2119 | sec = NULL; | |
b34976b6 | 2120 | unresolved_reloc = FALSE; |
8d88c4ca | 2121 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
2122 | { |
2123 | sym = local_syms + r_symndx; | |
2124 | sec = local_sections[r_symndx]; | |
c434dee6 | 2125 | |
8517fae7 | 2126 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
8da6118f | 2127 | } |
8d88c4ca | 2128 | else |
8da6118f | 2129 | { |
560e09e9 | 2130 | bfd_boolean warned; |
c434dee6 | 2131 | |
b2a8e766 AM |
2132 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2133 | r_symndx, symtab_hdr, sym_hashes, | |
2134 | h, sec, relocation, | |
2135 | unresolved_reloc, warned); | |
8da6118f | 2136 | } |
ab96bf03 AM |
2137 | |
2138 | if (sec != NULL && elf_discarded_section (sec)) | |
2139 | { | |
2140 | /* For relocs against symbols from removed linkonce sections, | |
2141 | or sections discarded by a linker script, we just want the | |
2142 | section contents zeroed. Avoid any special processing. */ | |
2143 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
2144 | rel->r_info = 0; | |
2145 | rel->r_addend = 0; | |
2146 | continue; | |
2147 | } | |
2148 | ||
2149 | if (info->relocatable) | |
2150 | continue; | |
2151 | ||
70256ad8 AJ |
2152 | /* When generating a shared object, the relocations handled here are |
2153 | copied into the output file to be resolved at run time. */ | |
2154 | switch (r_type) | |
2155 | { | |
7b81dfbb | 2156 | asection *base_got; |
70256ad8 | 2157 | case R_X86_64_GOT32: |
7b81dfbb | 2158 | case R_X86_64_GOT64: |
70256ad8 AJ |
2159 | /* Relocation is to the entry for this symbol in the global |
2160 | offset table. */ | |
70256ad8 | 2161 | case R_X86_64_GOTPCREL: |
7b81dfbb AJ |
2162 | case R_X86_64_GOTPCREL64: |
2163 | /* Use global offset table entry as symbol value. */ | |
2164 | case R_X86_64_GOTPLT64: | |
2165 | /* This is the same as GOT64 for relocation purposes, but | |
2166 | indicates the existence of a PLT entry. The difficulty is, | |
2167 | that we must calculate the GOT slot offset from the PLT | |
2168 | offset, if this symbol got a PLT entry (it was global). | |
2169 | Additionally if it's computed from the PLT entry, then that | |
2170 | GOT offset is relative to .got.plt, not to .got. */ | |
2171 | base_got = htab->sgot; | |
2172 | ||
c434dee6 AJ |
2173 | if (htab->sgot == NULL) |
2174 | abort (); | |
053579d7 | 2175 | |
51e0a107 | 2176 | if (h != NULL) |
70256ad8 | 2177 | { |
b34976b6 | 2178 | bfd_boolean dyn; |
c434dee6 AJ |
2179 | |
2180 | off = h->got.offset; | |
7b81dfbb AJ |
2181 | if (h->needs_plt |
2182 | && h->plt.offset != (bfd_vma)-1 | |
2183 | && off == (bfd_vma)-1) | |
2184 | { | |
2185 | /* We can't use h->got.offset here to save | |
2186 | state, or even just remember the offset, as | |
2187 | finish_dynamic_symbol would use that as offset into | |
2188 | .got. */ | |
2189 | bfd_vma plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
2190 | off = (plt_index + 3) * GOT_ENTRY_SIZE; | |
2191 | base_got = htab->sgotplt; | |
2192 | } | |
2193 | ||
c434dee6 | 2194 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 2195 | |
27482721 | 2196 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
51e0a107 | 2197 | || (info->shared |
27482721 | 2198 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
2199 | || (ELF_ST_VISIBILITY (h->other) |
2200 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
2201 | { |
2202 | /* This is actually a static link, or it is a -Bsymbolic | |
2203 | link and the symbol is defined locally, or the symbol | |
407443a3 | 2204 | was forced to be local because of a version file. We |
51e0a107 JH |
2205 | must initialize this entry in the global offset table. |
2206 | Since the offset must always be a multiple of 8, we | |
2207 | use the least significant bit to record whether we | |
2208 | have initialized it already. | |
2209 | ||
2210 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
2211 | relocation entry to initialize the value. This is |
2212 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
2213 | if ((off & 1) != 0) |
2214 | off &= ~1; | |
2215 | else | |
2216 | { | |
2217 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
2218 | base_got->contents + off); |
2219 | /* Note that this is harmless for the GOTPLT64 case, | |
2220 | as -1 | 1 still is -1. */ | |
51e0a107 JH |
2221 | h->got.offset |= 1; |
2222 | } | |
2223 | } | |
053579d7 | 2224 | else |
b34976b6 | 2225 | unresolved_reloc = FALSE; |
70256ad8 | 2226 | } |
51e0a107 JH |
2227 | else |
2228 | { | |
c434dee6 AJ |
2229 | if (local_got_offsets == NULL) |
2230 | abort (); | |
51e0a107 JH |
2231 | |
2232 | off = local_got_offsets[r_symndx]; | |
2233 | ||
2234 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
2235 | the least significant bit to record whether we have |
2236 | already generated the necessary reloc. */ | |
51e0a107 JH |
2237 | if ((off & 1) != 0) |
2238 | off &= ~1; | |
2239 | else | |
2240 | { | |
c434dee6 | 2241 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 2242 | base_got->contents + off); |
51e0a107 JH |
2243 | |
2244 | if (info->shared) | |
2245 | { | |
947216bf | 2246 | asection *s; |
51e0a107 | 2247 | Elf_Internal_Rela outrel; |
947216bf | 2248 | bfd_byte *loc; |
70256ad8 | 2249 | |
51e0a107 JH |
2250 | /* We need to generate a R_X86_64_RELATIVE reloc |
2251 | for the dynamic linker. */ | |
947216bf AM |
2252 | s = htab->srelgot; |
2253 | if (s == NULL) | |
c434dee6 | 2254 | abort (); |
51e0a107 | 2255 | |
7b81dfbb AJ |
2256 | outrel.r_offset = (base_got->output_section->vma |
2257 | + base_got->output_offset | |
51e0a107 JH |
2258 | + off); |
2259 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); | |
2260 | outrel.r_addend = relocation; | |
947216bf AM |
2261 | loc = s->contents; |
2262 | loc += s->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 2263 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
51e0a107 JH |
2264 | } |
2265 | ||
2266 | local_got_offsets[r_symndx] |= 1; | |
2267 | } | |
51e0a107 | 2268 | } |
6a2bda3f | 2269 | |
c434dee6 AJ |
2270 | if (off >= (bfd_vma) -2) |
2271 | abort (); | |
2272 | ||
7b81dfbb AJ |
2273 | relocation = base_got->output_section->vma |
2274 | + base_got->output_offset + off; | |
2275 | if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64) | |
8c37241b JJ |
2276 | relocation -= htab->sgotplt->output_section->vma |
2277 | - htab->sgotplt->output_offset; | |
c434dee6 | 2278 | |
70256ad8 AJ |
2279 | break; |
2280 | ||
d6ab8113 JB |
2281 | case R_X86_64_GOTOFF64: |
2282 | /* Relocation is relative to the start of the global offset | |
2283 | table. */ | |
2284 | ||
2285 | /* Check to make sure it isn't a protected function symbol | |
2286 | for shared library since it may not be local when used | |
2287 | as function address. */ | |
2288 | if (info->shared | |
2289 | && h | |
2290 | && h->def_regular | |
2291 | && h->type == STT_FUNC | |
2292 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
2293 | { | |
2294 | (*_bfd_error_handler) | |
2295 | (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"), | |
2296 | input_bfd, h->root.root.string); | |
2297 | bfd_set_error (bfd_error_bad_value); | |
2298 | return FALSE; | |
2299 | } | |
2300 | ||
2301 | /* Note that sgot is not involved in this | |
2302 | calculation. We always want the start of .got.plt. If we | |
2303 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
2304 | permitted by the ABI, we might have to change this | |
2305 | calculation. */ | |
2306 | relocation -= htab->sgotplt->output_section->vma | |
2307 | + htab->sgotplt->output_offset; | |
2308 | break; | |
2309 | ||
2310 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2311 | case R_X86_64_GOTPC64: |
d6ab8113 JB |
2312 | /* Use global offset table as symbol value. */ |
2313 | relocation = htab->sgotplt->output_section->vma | |
2314 | + htab->sgotplt->output_offset; | |
2315 | unresolved_reloc = FALSE; | |
2316 | break; | |
7b81dfbb AJ |
2317 | |
2318 | case R_X86_64_PLTOFF64: | |
2319 | /* Relocation is PLT entry relative to GOT. For local | |
2320 | symbols it's the symbol itself relative to GOT. */ | |
2321 | if (h != NULL | |
2322 | /* See PLT32 handling. */ | |
2323 | && h->plt.offset != (bfd_vma) -1 | |
2324 | && htab->splt != NULL) | |
2325 | { | |
2326 | relocation = (htab->splt->output_section->vma | |
2327 | + htab->splt->output_offset | |
2328 | + h->plt.offset); | |
2329 | unresolved_reloc = FALSE; | |
2330 | } | |
2331 | ||
2332 | relocation -= htab->sgotplt->output_section->vma | |
2333 | + htab->sgotplt->output_offset; | |
2334 | break; | |
d6ab8113 | 2335 | |
70256ad8 AJ |
2336 | case R_X86_64_PLT32: |
2337 | /* Relocation is to the entry for this symbol in the | |
2338 | procedure linkage table. */ | |
2339 | ||
2340 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 2341 | without using the procedure linkage table. */ |
70256ad8 AJ |
2342 | if (h == NULL) |
2343 | break; | |
2344 | ||
c434dee6 AJ |
2345 | if (h->plt.offset == (bfd_vma) -1 |
2346 | || htab->splt == NULL) | |
70256ad8 AJ |
2347 | { |
2348 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
2349 | happens when statically linking PIC code, or when |
2350 | using -Bsymbolic. */ | |
70256ad8 AJ |
2351 | break; |
2352 | } | |
2353 | ||
c434dee6 AJ |
2354 | relocation = (htab->splt->output_section->vma |
2355 | + htab->splt->output_offset | |
70256ad8 | 2356 | + h->plt.offset); |
b34976b6 | 2357 | unresolved_reloc = FALSE; |
70256ad8 AJ |
2358 | break; |
2359 | ||
fd8ab9e5 AJ |
2360 | case R_X86_64_PC8: |
2361 | case R_X86_64_PC16: | |
2362 | case R_X86_64_PC32: | |
6610a52d L |
2363 | if (info->shared |
2364 | && !SYMBOL_REFERENCES_LOCAL (info, h) | |
ba3bee0b | 2365 | && (input_section->flags & SEC_ALLOC) != 0 |
90f487df L |
2366 | && (input_section->flags & SEC_READONLY) != 0 |
2367 | && (!h->def_regular | |
2368 | || r_type != R_X86_64_PC32 | |
2369 | || h->type != STT_FUNC | |
2370 | || ELF_ST_VISIBILITY (h->other) != STV_PROTECTED | |
2371 | || !is_32bit_relative_branch (contents, | |
2372 | rel->r_offset))) | |
6610a52d | 2373 | { |
90f487df L |
2374 | if (h->def_regular |
2375 | && r_type == R_X86_64_PC32 | |
2376 | && h->type == STT_FUNC | |
2377 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
2378 | (*_bfd_error_handler) | |
2379 | (_("%B: relocation R_X86_64_PC32 against protected function `%s' can not be used when making a shared object"), | |
2380 | input_bfd, h->root.root.string); | |
2381 | else | |
2382 | (*_bfd_error_handler) | |
2383 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), | |
2384 | input_bfd, x86_64_elf_howto_table[r_type].name, | |
2385 | h->root.root.string); | |
6610a52d L |
2386 | bfd_set_error (bfd_error_bad_value); |
2387 | return FALSE; | |
2388 | } | |
2389 | /* Fall through. */ | |
2390 | ||
70256ad8 AJ |
2391 | case R_X86_64_8: |
2392 | case R_X86_64_16: | |
2393 | case R_X86_64_32: | |
d6ab8113 | 2394 | case R_X86_64_PC64: |
6b3db546 | 2395 | case R_X86_64_64: |
80643fbc | 2396 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 2397 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 2398 | |
b1e24c02 | 2399 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
2400 | break; |
2401 | ||
2402 | if ((info->shared | |
4bc6e03a AJ |
2403 | && (h == NULL |
2404 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2405 | || h->root.type != bfd_link_hash_undefweak) | |
c434dee6 AJ |
2406 | && ((r_type != R_X86_64_PC8 |
2407 | && r_type != R_X86_64_PC16 | |
d6ab8113 JB |
2408 | && r_type != R_X86_64_PC32 |
2409 | && r_type != R_X86_64_PC64) | |
f6c52c13 | 2410 | || !SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c AJ |
2411 | || (ELIMINATE_COPY_RELOCS |
2412 | && !info->shared | |
c434dee6 AJ |
2413 | && h != NULL |
2414 | && h->dynindx != -1 | |
f5385ebf AM |
2415 | && !h->non_got_ref |
2416 | && ((h->def_dynamic | |
2417 | && !h->def_regular) | |
c434dee6 AJ |
2418 | || h->root.type == bfd_link_hash_undefweak |
2419 | || h->root.type == bfd_link_hash_undefined))) | |
70256ad8 AJ |
2420 | { |
2421 | Elf_Internal_Rela outrel; | |
947216bf | 2422 | bfd_byte *loc; |
b34976b6 | 2423 | bfd_boolean skip, relocate; |
c434dee6 | 2424 | asection *sreloc; |
70256ad8 AJ |
2425 | |
2426 | /* When generating a shared object, these relocations | |
2427 | are copied into the output file to be resolved at run | |
407443a3 | 2428 | time. */ |
b34976b6 AM |
2429 | skip = FALSE; |
2430 | relocate = FALSE; | |
70256ad8 | 2431 | |
c629eae0 JJ |
2432 | outrel.r_offset = |
2433 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 2434 | rel->r_offset); |
c629eae0 | 2435 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 2436 | skip = TRUE; |
0fb19cbc | 2437 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2438 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
2439 | |
2440 | outrel.r_offset += (input_section->output_section->vma | |
2441 | + input_section->output_offset); | |
2442 | ||
2443 | if (skip) | |
0bb2d96a | 2444 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 2445 | |
fd8ab9e5 AJ |
2446 | /* h->dynindx may be -1 if this symbol was marked to |
2447 | become local. */ | |
2448 | else if (h != NULL | |
c434dee6 AJ |
2449 | && h->dynindx != -1 |
2450 | && (r_type == R_X86_64_PC8 | |
2451 | || r_type == R_X86_64_PC16 | |
2452 | || r_type == R_X86_64_PC32 | |
d6ab8113 | 2453 | || r_type == R_X86_64_PC64 |
c434dee6 | 2454 | || !info->shared |
55255dae | 2455 | || !SYMBOLIC_BIND (info, h) |
f5385ebf | 2456 | || !h->def_regular)) |
70256ad8 | 2457 | { |
70256ad8 | 2458 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
c434dee6 | 2459 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
2460 | } |
2461 | else | |
2462 | { | |
c434dee6 | 2463 | /* This symbol is local, or marked to become local. */ |
607c0e09 AS |
2464 | if (r_type == R_X86_64_64) |
2465 | { | |
b34976b6 | 2466 | relocate = TRUE; |
607c0e09 AS |
2467 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
2468 | outrel.r_addend = relocation + rel->r_addend; | |
2469 | } | |
2470 | else | |
2471 | { | |
2472 | long sindx; | |
2473 | ||
8517fae7 | 2474 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
2475 | sindx = 0; |
2476 | else if (sec == NULL || sec->owner == NULL) | |
2477 | { | |
2478 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2479 | return FALSE; |
607c0e09 AS |
2480 | } |
2481 | else | |
2482 | { | |
2483 | asection *osec; | |
2484 | ||
74541ad4 AM |
2485 | /* We are turning this relocation into one |
2486 | against a section symbol. It would be | |
2487 | proper to subtract the symbol's value, | |
2488 | osec->vma, from the emitted reloc addend, | |
2489 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
2490 | osec = sec->output_section; |
2491 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
2492 | if (sindx == 0) |
2493 | { | |
2494 | asection *oi = htab->elf.text_index_section; | |
2495 | sindx = elf_section_data (oi)->dynindx; | |
2496 | } | |
2497 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
2498 | } |
2499 | ||
2500 | outrel.r_info = ELF64_R_INFO (sindx, r_type); | |
2501 | outrel.r_addend = relocation + rel->r_addend; | |
2502 | } | |
70256ad8 AJ |
2503 | } |
2504 | ||
c434dee6 AJ |
2505 | sreloc = elf_section_data (input_section)->sreloc; |
2506 | if (sreloc == NULL) | |
2507 | abort (); | |
2508 | ||
947216bf AM |
2509 | loc = sreloc->contents; |
2510 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 2511 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
70256ad8 AJ |
2512 | |
2513 | /* If this reloc is against an external symbol, we do | |
2514 | not want to fiddle with the addend. Otherwise, we | |
2515 | need to include the symbol value so that it becomes | |
2516 | an addend for the dynamic reloc. */ | |
2517 | if (! relocate) | |
2518 | continue; | |
2519 | } | |
2520 | ||
2521 | break; | |
2522 | ||
bffbf940 | 2523 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
2524 | case R_X86_64_GOTPC32_TLSDESC: |
2525 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
2526 | case R_X86_64_GOTTPOFF: |
2527 | r_type = elf64_x86_64_tls_transition (info, r_type, h == NULL); | |
2528 | tls_type = GOT_UNKNOWN; | |
2529 | if (h == NULL && local_got_offsets) | |
2530 | tls_type = elf64_x86_64_local_got_tls_type (input_bfd) [r_symndx]; | |
2531 | else if (h != NULL) | |
2532 | { | |
2533 | tls_type = elf64_x86_64_hash_entry (h)->tls_type; | |
2534 | if (!info->shared && h->dynindx == -1 && tls_type == GOT_TLS_IE) | |
2535 | r_type = R_X86_64_TPOFF32; | |
2536 | } | |
67a4f2b7 AO |
2537 | if (r_type == R_X86_64_TLSGD |
2538 | || r_type == R_X86_64_GOTPC32_TLSDESC | |
2539 | || r_type == R_X86_64_TLSDESC_CALL) | |
bffbf940 JJ |
2540 | { |
2541 | if (tls_type == GOT_TLS_IE) | |
2542 | r_type = R_X86_64_GOTTPOFF; | |
2543 | } | |
2544 | ||
2545 | if (r_type == R_X86_64_TPOFF32) | |
2546 | { | |
2547 | BFD_ASSERT (! unresolved_reloc); | |
2548 | if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSGD) | |
2549 | { | |
2550 | unsigned int i; | |
abcf1d52 JJ |
2551 | static unsigned char tlsgd[8] |
2552 | = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 }; | |
bffbf940 JJ |
2553 | |
2554 | /* GD->LE transition. | |
abcf1d52 JJ |
2555 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
2556 | .word 0x6666; rex64; call __tls_get_addr@plt | |
bffbf940 JJ |
2557 | Change it into: |
2558 | movq %fs:0, %rax | |
2559 | leaq foo@tpoff(%rax), %rax */ | |
abcf1d52 JJ |
2560 | BFD_ASSERT (rel->r_offset >= 4); |
2561 | for (i = 0; i < 4; i++) | |
bffbf940 | 2562 | BFD_ASSERT (bfd_get_8 (input_bfd, |
abcf1d52 | 2563 | contents + rel->r_offset - 4 + i) |
bffbf940 | 2564 | == tlsgd[i]); |
eea6121a | 2565 | BFD_ASSERT (rel->r_offset + 12 <= input_section->size); |
abcf1d52 JJ |
2566 | for (i = 0; i < 4; i++) |
2567 | BFD_ASSERT (bfd_get_8 (input_bfd, | |
2568 | contents + rel->r_offset + 4 + i) | |
2569 | == tlsgd[i+4]); | |
bffbf940 JJ |
2570 | BFD_ASSERT (rel + 1 < relend); |
2571 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
abcf1d52 | 2572 | memcpy (contents + rel->r_offset - 4, |
bffbf940 JJ |
2573 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", |
2574 | 16); | |
2575 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
abcf1d52 | 2576 | contents + rel->r_offset + 8); |
bffbf940 JJ |
2577 | /* Skip R_X86_64_PLT32. */ |
2578 | rel++; | |
2579 | continue; | |
2580 | } | |
67a4f2b7 AO |
2581 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
2582 | { | |
2583 | /* GDesc -> LE transition. | |
2584 | It's originally something like: | |
2585 | leaq x@tlsdesc(%rip), %rax | |
2586 | ||
2587 | Change it to: | |
2588 | movl $x@tpoff, %rax | |
2589 | ||
2590 | Registers other than %rax may be set up here. */ | |
2591 | ||
2592 | unsigned int val, type, type2; | |
2593 | bfd_vma roff; | |
2594 | ||
2595 | /* First, make sure it's a leaq adding rip to a | |
2596 | 32-bit offset into any register, although it's | |
2597 | probably almost always going to be rax. */ | |
2598 | roff = rel->r_offset; | |
2599 | BFD_ASSERT (roff >= 3); | |
2600 | type = bfd_get_8 (input_bfd, contents + roff - 3); | |
2601 | BFD_ASSERT ((type & 0xfb) == 0x48); | |
2602 | type2 = bfd_get_8 (input_bfd, contents + roff - 2); | |
2603 | BFD_ASSERT (type2 == 0x8d); | |
2604 | val = bfd_get_8 (input_bfd, contents + roff - 1); | |
2605 | BFD_ASSERT ((val & 0xc7) == 0x05); | |
2606 | BFD_ASSERT (roff + 4 <= input_section->size); | |
2607 | ||
2608 | /* Now modify the instruction as appropriate. */ | |
2609 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), | |
2610 | contents + roff - 3); | |
2611 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
2612 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
2613 | contents + roff - 1); | |
2614 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
2615 | contents + roff); | |
2616 | continue; | |
2617 | } | |
2618 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) | |
2619 | { | |
2620 | /* GDesc -> LE transition. | |
2621 | It's originally: | |
2622 | call *(%rax) | |
2623 | Turn it into: | |
2624 | nop; nop. */ | |
2625 | ||
2626 | unsigned int val, type; | |
2627 | bfd_vma roff; | |
2628 | ||
2629 | /* First, make sure it's a call *(%rax). */ | |
2630 | roff = rel->r_offset; | |
2631 | BFD_ASSERT (roff + 2 <= input_section->size); | |
2632 | type = bfd_get_8 (input_bfd, contents + roff); | |
2633 | BFD_ASSERT (type == 0xff); | |
2634 | val = bfd_get_8 (input_bfd, contents + roff + 1); | |
2635 | BFD_ASSERT (val == 0x10); | |
2636 | ||
10efb593 L |
2637 | /* Now modify the instruction as appropriate. Use |
2638 | xchg %ax,%ax instead of 2 nops. */ | |
2639 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
2640 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
2641 | continue; | |
2642 | } | |
bffbf940 JJ |
2643 | else |
2644 | { | |
2645 | unsigned int val, type, reg; | |
2646 | ||
2647 | /* IE->LE transition: | |
2648 | Originally it can be one of: | |
2649 | movq foo@gottpoff(%rip), %reg | |
2650 | addq foo@gottpoff(%rip), %reg | |
2651 | We change it into: | |
2652 | movq $foo, %reg | |
2653 | leaq foo(%reg), %reg | |
2654 | addq $foo, %reg. */ | |
2655 | BFD_ASSERT (rel->r_offset >= 3); | |
2656 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 3); | |
2657 | BFD_ASSERT (val == 0x48 || val == 0x4c); | |
2658 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
2659 | BFD_ASSERT (type == 0x8b || type == 0x03); | |
2660 | reg = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
2661 | BFD_ASSERT ((reg & 0xc7) == 5); | |
2662 | reg >>= 3; | |
eea6121a | 2663 | BFD_ASSERT (rel->r_offset + 4 <= input_section->size); |
bffbf940 JJ |
2664 | if (type == 0x8b) |
2665 | { | |
2666 | /* movq */ | |
2667 | if (val == 0x4c) | |
2668 | bfd_put_8 (output_bfd, 0x49, | |
2669 | contents + rel->r_offset - 3); | |
2670 | bfd_put_8 (output_bfd, 0xc7, | |
2671 | contents + rel->r_offset - 2); | |
2672 | bfd_put_8 (output_bfd, 0xc0 | reg, | |
2673 | contents + rel->r_offset - 1); | |
2674 | } | |
2675 | else if (reg == 4) | |
2676 | { | |
2677 | /* addq -> addq - addressing with %rsp/%r12 is | |
2678 | special */ | |
2679 | if (val == 0x4c) | |
2680 | bfd_put_8 (output_bfd, 0x49, | |
2681 | contents + rel->r_offset - 3); | |
2682 | bfd_put_8 (output_bfd, 0x81, | |
2683 | contents + rel->r_offset - 2); | |
2684 | bfd_put_8 (output_bfd, 0xc0 | reg, | |
2685 | contents + rel->r_offset - 1); | |
2686 | } | |
2687 | else | |
2688 | { | |
2689 | /* addq -> leaq */ | |
2690 | if (val == 0x4c) | |
2691 | bfd_put_8 (output_bfd, 0x4d, | |
2692 | contents + rel->r_offset - 3); | |
2693 | bfd_put_8 (output_bfd, 0x8d, | |
2694 | contents + rel->r_offset - 2); | |
2695 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), | |
2696 | contents + rel->r_offset - 1); | |
2697 | } | |
2698 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
2699 | contents + rel->r_offset); | |
2700 | continue; | |
2701 | } | |
2702 | } | |
2703 | ||
2704 | if (htab->sgot == NULL) | |
2705 | abort (); | |
2706 | ||
2707 | if (h != NULL) | |
67a4f2b7 AO |
2708 | { |
2709 | off = h->got.offset; | |
2710 | offplt = elf64_x86_64_hash_entry (h)->tlsdesc_got; | |
2711 | } | |
bffbf940 JJ |
2712 | else |
2713 | { | |
2714 | if (local_got_offsets == NULL) | |
2715 | abort (); | |
2716 | ||
2717 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 2718 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
2719 | } |
2720 | ||
2721 | if ((off & 1) != 0) | |
2722 | off &= ~1; | |
26e41594 | 2723 | else |
bffbf940 JJ |
2724 | { |
2725 | Elf_Internal_Rela outrel; | |
947216bf | 2726 | bfd_byte *loc; |
bffbf940 | 2727 | int dr_type, indx; |
67a4f2b7 | 2728 | asection *sreloc; |
bffbf940 JJ |
2729 | |
2730 | if (htab->srelgot == NULL) | |
2731 | abort (); | |
2732 | ||
67a4f2b7 AO |
2733 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
2734 | ||
2735 | if (GOT_TLS_GDESC_P (tls_type)) | |
2736 | { | |
2737 | outrel.r_info = ELF64_R_INFO (indx, R_X86_64_TLSDESC); | |
2738 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt | |
2739 | + 2 * GOT_ENTRY_SIZE <= htab->sgotplt->size); | |
2740 | outrel.r_offset = (htab->sgotplt->output_section->vma | |
2741 | + htab->sgotplt->output_offset | |
2742 | + offplt | |
2743 | + htab->sgotplt_jump_table_size); | |
2744 | sreloc = htab->srelplt; | |
2745 | loc = sreloc->contents; | |
2746 | loc += sreloc->reloc_count++ | |
2747 | * sizeof (Elf64_External_Rela); | |
2748 | BFD_ASSERT (loc + sizeof (Elf64_External_Rela) | |
2749 | <= sreloc->contents + sreloc->size); | |
2750 | if (indx == 0) | |
2751 | outrel.r_addend = relocation - dtpoff_base (info); | |
2752 | else | |
2753 | outrel.r_addend = 0; | |
2754 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2755 | } | |
2756 | ||
2757 | sreloc = htab->srelgot; | |
2758 | ||
bffbf940 JJ |
2759 | outrel.r_offset = (htab->sgot->output_section->vma |
2760 | + htab->sgot->output_offset + off); | |
2761 | ||
67a4f2b7 | 2762 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 2763 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
2764 | else if (GOT_TLS_GDESC_P (tls_type)) |
2765 | goto dr_done; | |
bffbf940 JJ |
2766 | else |
2767 | dr_type = R_X86_64_TPOFF64; | |
2768 | ||
2769 | bfd_put_64 (output_bfd, 0, htab->sgot->contents + off); | |
2770 | outrel.r_addend = 0; | |
67a4f2b7 AO |
2771 | if ((dr_type == R_X86_64_TPOFF64 |
2772 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
bffbf940 JJ |
2773 | outrel.r_addend = relocation - dtpoff_base (info); |
2774 | outrel.r_info = ELF64_R_INFO (indx, dr_type); | |
2775 | ||
67a4f2b7 AO |
2776 | loc = sreloc->contents; |
2777 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2778 | BFD_ASSERT (loc + sizeof (Elf64_External_Rela) | |
2779 | <= sreloc->contents + sreloc->size); | |
bffbf940 JJ |
2780 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
2781 | ||
67a4f2b7 | 2782 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
2783 | { |
2784 | if (indx == 0) | |
2785 | { | |
d40d037c | 2786 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 JJ |
2787 | bfd_put_64 (output_bfd, |
2788 | relocation - dtpoff_base (info), | |
2789 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2790 | } | |
2791 | else | |
2792 | { | |
2793 | bfd_put_64 (output_bfd, 0, | |
2794 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2795 | outrel.r_info = ELF64_R_INFO (indx, | |
2796 | R_X86_64_DTPOFF64); | |
2797 | outrel.r_offset += GOT_ENTRY_SIZE; | |
67a4f2b7 | 2798 | sreloc->reloc_count++; |
947216bf | 2799 | loc += sizeof (Elf64_External_Rela); |
67a4f2b7 AO |
2800 | BFD_ASSERT (loc + sizeof (Elf64_External_Rela) |
2801 | <= sreloc->contents + sreloc->size); | |
947216bf | 2802 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
bffbf940 JJ |
2803 | } |
2804 | } | |
2805 | ||
67a4f2b7 | 2806 | dr_done: |
bffbf940 JJ |
2807 | if (h != NULL) |
2808 | h->got.offset |= 1; | |
2809 | else | |
2810 | local_got_offsets[r_symndx] |= 1; | |
2811 | } | |
2812 | ||
67a4f2b7 AO |
2813 | if (off >= (bfd_vma) -2 |
2814 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 JJ |
2815 | abort (); |
2816 | if (r_type == ELF64_R_TYPE (rel->r_info)) | |
2817 | { | |
67a4f2b7 AO |
2818 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
2819 | || r_type == R_X86_64_TLSDESC_CALL) | |
2820 | relocation = htab->sgotplt->output_section->vma | |
2821 | + htab->sgotplt->output_offset | |
2822 | + offplt + htab->sgotplt_jump_table_size; | |
2823 | else | |
2824 | relocation = htab->sgot->output_section->vma | |
2825 | + htab->sgot->output_offset + off; | |
b34976b6 | 2826 | unresolved_reloc = FALSE; |
bffbf940 | 2827 | } |
67a4f2b7 | 2828 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 JJ |
2829 | { |
2830 | unsigned int i; | |
abcf1d52 JJ |
2831 | static unsigned char tlsgd[8] |
2832 | = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 }; | |
bffbf940 JJ |
2833 | |
2834 | /* GD->IE transition. | |
abcf1d52 JJ |
2835 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
2836 | .word 0x6666; rex64; call __tls_get_addr@plt | |
bffbf940 JJ |
2837 | Change it into: |
2838 | movq %fs:0, %rax | |
2839 | addq foo@gottpoff(%rip), %rax */ | |
abcf1d52 JJ |
2840 | BFD_ASSERT (rel->r_offset >= 4); |
2841 | for (i = 0; i < 4; i++) | |
26e41594 | 2842 | BFD_ASSERT (bfd_get_8 (input_bfd, |
abcf1d52 | 2843 | contents + rel->r_offset - 4 + i) |
bffbf940 | 2844 | == tlsgd[i]); |
eea6121a | 2845 | BFD_ASSERT (rel->r_offset + 12 <= input_section->size); |
abcf1d52 | 2846 | for (i = 0; i < 4; i++) |
26e41594 | 2847 | BFD_ASSERT (bfd_get_8 (input_bfd, |
abcf1d52 JJ |
2848 | contents + rel->r_offset + 4 + i) |
2849 | == tlsgd[i+4]); | |
bffbf940 JJ |
2850 | BFD_ASSERT (rel + 1 < relend); |
2851 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
abcf1d52 | 2852 | memcpy (contents + rel->r_offset - 4, |
bffbf940 JJ |
2853 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", |
2854 | 16); | |
2855 | ||
2856 | relocation = (htab->sgot->output_section->vma | |
2857 | + htab->sgot->output_offset + off | |
2858 | - rel->r_offset | |
2859 | - input_section->output_section->vma | |
2860 | - input_section->output_offset | |
abcf1d52 | 2861 | - 12); |
bffbf940 | 2862 | bfd_put_32 (output_bfd, relocation, |
abcf1d52 | 2863 | contents + rel->r_offset + 8); |
bffbf940 JJ |
2864 | /* Skip R_X86_64_PLT32. */ |
2865 | rel++; | |
2866 | continue; | |
2867 | } | |
67a4f2b7 AO |
2868 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
2869 | { | |
2870 | /* GDesc -> IE transition. | |
2871 | It's originally something like: | |
2872 | leaq x@tlsdesc(%rip), %rax | |
2873 | ||
2874 | Change it to: | |
2875 | movq x@gottpoff(%rip), %rax # before nop; nop | |
2876 | ||
2877 | Registers other than %rax may be set up here. */ | |
2878 | ||
2879 | unsigned int val, type, type2; | |
2880 | bfd_vma roff; | |
2881 | ||
2882 | /* First, make sure it's a leaq adding rip to a 32-bit | |
2883 | offset into any register, although it's probably | |
2884 | almost always going to be rax. */ | |
2885 | roff = rel->r_offset; | |
2886 | BFD_ASSERT (roff >= 3); | |
2887 | type = bfd_get_8 (input_bfd, contents + roff - 3); | |
2888 | BFD_ASSERT ((type & 0xfb) == 0x48); | |
2889 | type2 = bfd_get_8 (input_bfd, contents + roff - 2); | |
2890 | BFD_ASSERT (type2 == 0x8d); | |
2891 | val = bfd_get_8 (input_bfd, contents + roff - 1); | |
2892 | BFD_ASSERT ((val & 0xc7) == 0x05); | |
2893 | BFD_ASSERT (roff + 4 <= input_section->size); | |
2894 | ||
2895 | /* Now modify the instruction as appropriate. */ | |
2896 | /* To turn a leaq into a movq in the form we use it, it | |
2897 | suffices to change the second byte from 0x8d to | |
2898 | 0x8b. */ | |
2899 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
2900 | ||
2901 | bfd_put_32 (output_bfd, | |
2902 | htab->sgot->output_section->vma | |
2903 | + htab->sgot->output_offset + off | |
2904 | - rel->r_offset | |
2905 | - input_section->output_section->vma | |
2906 | - input_section->output_offset | |
2907 | - 4, | |
2908 | contents + roff); | |
2909 | continue; | |
2910 | } | |
2911 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) | |
2912 | { | |
2913 | /* GDesc -> IE transition. | |
2914 | It's originally: | |
2915 | call *(%rax) | |
2916 | ||
2917 | Change it to: | |
2918 | nop; nop. */ | |
2919 | ||
2920 | unsigned int val, type; | |
2921 | bfd_vma roff; | |
2922 | ||
2923 | /* First, make sure it's a call *(%eax). */ | |
2924 | roff = rel->r_offset; | |
2925 | BFD_ASSERT (roff + 2 <= input_section->size); | |
2926 | type = bfd_get_8 (input_bfd, contents + roff); | |
2927 | BFD_ASSERT (type == 0xff); | |
2928 | val = bfd_get_8 (input_bfd, contents + roff + 1); | |
2929 | BFD_ASSERT (val == 0x10); | |
2930 | ||
10efb593 L |
2931 | /* Now modify the instruction as appropriate. Use |
2932 | xchg %ax,%ax instead of 2 nops. */ | |
2933 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
2934 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
2935 | ||
2936 | continue; | |
2937 | } | |
2938 | else | |
2939 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
2940 | break; |
2941 | ||
2942 | case R_X86_64_TLSLD: | |
2943 | if (! info->shared) | |
2944 | { | |
2945 | /* LD->LE transition: | |
2946 | Ensure it is: | |
2947 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr@plt. | |
2948 | We change it into: | |
2949 | .word 0x6666; .byte 0x66; movl %fs:0, %rax. */ | |
2950 | BFD_ASSERT (rel->r_offset >= 3); | |
2951 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 3) | |
2952 | == 0x48); | |
2953 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2) | |
2954 | == 0x8d); | |
2955 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 1) | |
2956 | == 0x3d); | |
eea6121a | 2957 | BFD_ASSERT (rel->r_offset + 9 <= input_section->size); |
bffbf940 JJ |
2958 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4) |
2959 | == 0xe8); | |
2960 | BFD_ASSERT (rel + 1 < relend); | |
2961 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
2962 | memcpy (contents + rel->r_offset - 3, | |
2963 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
2964 | /* Skip R_X86_64_PLT32. */ | |
2965 | rel++; | |
2966 | continue; | |
2967 | } | |
2968 | ||
2969 | if (htab->sgot == NULL) | |
2970 | abort (); | |
2971 | ||
2972 | off = htab->tls_ld_got.offset; | |
2973 | if (off & 1) | |
2974 | off &= ~1; | |
2975 | else | |
2976 | { | |
2977 | Elf_Internal_Rela outrel; | |
947216bf | 2978 | bfd_byte *loc; |
bffbf940 JJ |
2979 | |
2980 | if (htab->srelgot == NULL) | |
2981 | abort (); | |
2982 | ||
2983 | outrel.r_offset = (htab->sgot->output_section->vma | |
2984 | + htab->sgot->output_offset + off); | |
2985 | ||
2986 | bfd_put_64 (output_bfd, 0, | |
2987 | htab->sgot->contents + off); | |
2988 | bfd_put_64 (output_bfd, 0, | |
2989 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2990 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_DTPMOD64); | |
2991 | outrel.r_addend = 0; | |
947216bf AM |
2992 | loc = htab->srelgot->contents; |
2993 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
bffbf940 JJ |
2994 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
2995 | htab->tls_ld_got.offset |= 1; | |
2996 | } | |
2997 | relocation = htab->sgot->output_section->vma | |
2998 | + htab->sgot->output_offset + off; | |
b34976b6 | 2999 | unresolved_reloc = FALSE; |
bffbf940 JJ |
3000 | break; |
3001 | ||
3002 | case R_X86_64_DTPOFF32: | |
a45bb67d | 3003 | if (info->shared || (input_section->flags & SEC_CODE) == 0) |
bffbf940 JJ |
3004 | relocation -= dtpoff_base (info); |
3005 | else | |
3006 | relocation = tpoff (info, relocation); | |
3007 | break; | |
3008 | ||
3009 | case R_X86_64_TPOFF32: | |
3010 | BFD_ASSERT (! info->shared); | |
3011 | relocation = tpoff (info, relocation); | |
3012 | break; | |
3013 | ||
70256ad8 AJ |
3014 | default: |
3015 | break; | |
3016 | } | |
8d88c4ca | 3017 | |
239e1f3a AM |
3018 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3019 | because such sections are not SEC_ALLOC and thus ld.so will | |
3020 | not process them. */ | |
c434dee6 | 3021 | if (unresolved_reloc |
239e1f3a | 3022 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
f5385ebf | 3023 | && h->def_dynamic)) |
c434dee6 | 3024 | (*_bfd_error_handler) |
843fe662 | 3025 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
3026 | input_bfd, |
3027 | input_section, | |
c434dee6 | 3028 | (long) rel->r_offset, |
843fe662 | 3029 | howto->name, |
c434dee6 AJ |
3030 | h->root.root.string); |
3031 | ||
8d88c4ca | 3032 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
3033 | contents, rel->r_offset, |
3034 | relocation, rel->r_addend); | |
8d88c4ca NC |
3035 | |
3036 | if (r != bfd_reloc_ok) | |
8da6118f | 3037 | { |
c434dee6 AJ |
3038 | const char *name; |
3039 | ||
3040 | if (h != NULL) | |
3041 | name = h->root.root.string; | |
3042 | else | |
8da6118f | 3043 | { |
c434dee6 AJ |
3044 | name = bfd_elf_string_from_elf_section (input_bfd, |
3045 | symtab_hdr->sh_link, | |
3046 | sym->st_name); | |
3047 | if (name == NULL) | |
b34976b6 | 3048 | return FALSE; |
c434dee6 AJ |
3049 | if (*name == '\0') |
3050 | name = bfd_section_name (input_bfd, sec); | |
3051 | } | |
3052 | ||
3053 | if (r == bfd_reloc_overflow) | |
3054 | { | |
c434dee6 | 3055 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
3056 | (info, (h ? &h->root : NULL), name, howto->name, |
3057 | (bfd_vma) 0, input_bfd, input_section, | |
3058 | rel->r_offset))) | |
b34976b6 | 3059 | return FALSE; |
c434dee6 AJ |
3060 | } |
3061 | else | |
3062 | { | |
3063 | (*_bfd_error_handler) | |
d003868e AM |
3064 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
3065 | input_bfd, input_section, | |
c434dee6 | 3066 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 3067 | return FALSE; |
8da6118f KH |
3068 | } |
3069 | } | |
8d88c4ca | 3070 | } |
70256ad8 | 3071 | |
b34976b6 | 3072 | return TRUE; |
70256ad8 AJ |
3073 | } |
3074 | ||
3075 | /* Finish up dynamic symbol handling. We set the contents of various | |
3076 | dynamic sections here. */ | |
3077 | ||
b34976b6 | 3078 | static bfd_boolean |
27482721 AJ |
3079 | elf64_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
3080 | struct bfd_link_info *info, | |
3081 | struct elf_link_hash_entry *h, | |
3082 | Elf_Internal_Sym *sym) | |
70256ad8 | 3083 | { |
c434dee6 | 3084 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 | 3085 | |
c434dee6 | 3086 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
3087 | |
3088 | if (h->plt.offset != (bfd_vma) -1) | |
3089 | { | |
70256ad8 AJ |
3090 | bfd_vma plt_index; |
3091 | bfd_vma got_offset; | |
3092 | Elf_Internal_Rela rela; | |
947216bf | 3093 | bfd_byte *loc; |
70256ad8 AJ |
3094 | |
3095 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 3096 | it up. */ |
c434dee6 AJ |
3097 | if (h->dynindx == -1 |
3098 | || htab->splt == NULL | |
3099 | || htab->sgotplt == NULL | |
3100 | || htab->srelplt == NULL) | |
3101 | abort (); | |
70256ad8 AJ |
3102 | |
3103 | /* Get the index in the procedure linkage table which | |
3104 | corresponds to this symbol. This is the index of this symbol | |
3105 | in all the symbols for which we are making plt entries. The | |
3106 | first entry in the procedure linkage table is reserved. */ | |
3107 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
3108 | ||
3109 | /* Get the offset into the .got table of the entry that | |
407443a3 | 3110 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
fe4770f4 | 3111 | bytes. The first three are reserved for the dynamic linker. */ |
70256ad8 AJ |
3112 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
3113 | ||
3114 | /* Fill in the entry in the procedure linkage table. */ | |
c434dee6 | 3115 | memcpy (htab->splt->contents + h->plt.offset, elf64_x86_64_plt_entry, |
70256ad8 AJ |
3116 | PLT_ENTRY_SIZE); |
3117 | ||
3118 | /* Insert the relocation positions of the plt section. The magic | |
3119 | numbers at the end of the statements are the positions of the | |
3120 | relocations in the plt section. */ | |
653165cc AJ |
3121 | /* Put offset for jmp *name@GOTPCREL(%rip), since the |
3122 | instruction uses 6 bytes, subtract this value. */ | |
3123 | bfd_put_32 (output_bfd, | |
c434dee6 AJ |
3124 | (htab->sgotplt->output_section->vma |
3125 | + htab->sgotplt->output_offset | |
653165cc | 3126 | + got_offset |
c434dee6 AJ |
3127 | - htab->splt->output_section->vma |
3128 | - htab->splt->output_offset | |
653165cc AJ |
3129 | - h->plt.offset |
3130 | - 6), | |
c434dee6 | 3131 | htab->splt->contents + h->plt.offset + 2); |
653165cc AJ |
3132 | /* Put relocation index. */ |
3133 | bfd_put_32 (output_bfd, plt_index, | |
c434dee6 | 3134 | htab->splt->contents + h->plt.offset + 7); |
653165cc AJ |
3135 | /* Put offset for jmp .PLT0. */ |
3136 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), | |
c434dee6 | 3137 | htab->splt->contents + h->plt.offset + 12); |
70256ad8 | 3138 | |
653165cc AJ |
3139 | /* Fill in the entry in the global offset table, initially this |
3140 | points to the pushq instruction in the PLT which is at offset 6. */ | |
c434dee6 AJ |
3141 | bfd_put_64 (output_bfd, (htab->splt->output_section->vma |
3142 | + htab->splt->output_offset | |
70256ad8 | 3143 | + h->plt.offset + 6), |
c434dee6 | 3144 | htab->sgotplt->contents + got_offset); |
70256ad8 AJ |
3145 | |
3146 | /* Fill in the entry in the .rela.plt section. */ | |
c434dee6 AJ |
3147 | rela.r_offset = (htab->sgotplt->output_section->vma |
3148 | + htab->sgotplt->output_offset | |
70256ad8 AJ |
3149 | + got_offset); |
3150 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_JUMP_SLOT); | |
3151 | rela.r_addend = 0; | |
947216bf | 3152 | loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela); |
c434dee6 | 3153 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 | 3154 | |
f5385ebf | 3155 | if (!h->def_regular) |
70256ad8 AJ |
3156 | { |
3157 | /* Mark the symbol as undefined, rather than as defined in | |
47a9f7b3 JJ |
3158 | the .plt section. Leave the value if there were any |
3159 | relocations where pointer equality matters (this is a clue | |
c434dee6 AJ |
3160 | for the dynamic linker, to make function pointer |
3161 | comparisons work between an application and shared | |
47a9f7b3 JJ |
3162 | library), otherwise set it to zero. If a function is only |
3163 | called from a binary, there is no need to slow down | |
3164 | shared libraries because of that. */ | |
70256ad8 | 3165 | sym->st_shndx = SHN_UNDEF; |
f5385ebf | 3166 | if (!h->pointer_equality_needed) |
47a9f7b3 | 3167 | sym->st_value = 0; |
70256ad8 AJ |
3168 | } |
3169 | } | |
3170 | ||
bffbf940 | 3171 | if (h->got.offset != (bfd_vma) -1 |
67a4f2b7 | 3172 | && ! GOT_TLS_GD_ANY_P (elf64_x86_64_hash_entry (h)->tls_type) |
bffbf940 | 3173 | && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE) |
053579d7 | 3174 | { |
053579d7 | 3175 | Elf_Internal_Rela rela; |
947216bf | 3176 | bfd_byte *loc; |
053579d7 AJ |
3177 | |
3178 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 3179 | up. */ |
c434dee6 AJ |
3180 | if (htab->sgot == NULL || htab->srelgot == NULL) |
3181 | abort (); | |
053579d7 | 3182 | |
c434dee6 AJ |
3183 | rela.r_offset = (htab->sgot->output_section->vma |
3184 | + htab->sgot->output_offset | |
dc810e39 | 3185 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
3186 | |
3187 | /* If this is a static link, or it is a -Bsymbolic link and the | |
3188 | symbol is defined locally or was forced to be local because | |
3189 | of a version file, we just want to emit a RELATIVE reloc. | |
3190 | The entry in the global offset table will already have been | |
3191 | initialized in the relocate_section function. */ | |
c434dee6 | 3192 | if (info->shared |
27482721 | 3193 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
053579d7 | 3194 | { |
cc78d0af | 3195 | BFD_ASSERT((h->got.offset & 1) != 0); |
053579d7 AJ |
3196 | rela.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
3197 | rela.r_addend = (h->root.u.def.value | |
3198 | + h->root.u.def.section->output_section->vma | |
3199 | + h->root.u.def.section->output_offset); | |
3200 | } | |
3201 | else | |
3202 | { | |
3203 | BFD_ASSERT((h->got.offset & 1) == 0); | |
c434dee6 AJ |
3204 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
3205 | htab->sgot->contents + h->got.offset); | |
053579d7 AJ |
3206 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_GLOB_DAT); |
3207 | rela.r_addend = 0; | |
3208 | } | |
3209 | ||
947216bf AM |
3210 | loc = htab->srelgot->contents; |
3211 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 3212 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
053579d7 AJ |
3213 | } |
3214 | ||
f5385ebf | 3215 | if (h->needs_copy) |
70256ad8 | 3216 | { |
70256ad8 | 3217 | Elf_Internal_Rela rela; |
947216bf | 3218 | bfd_byte *loc; |
70256ad8 AJ |
3219 | |
3220 | /* This symbol needs a copy reloc. Set it up. */ | |
3221 | ||
c434dee6 AJ |
3222 | if (h->dynindx == -1 |
3223 | || (h->root.type != bfd_link_hash_defined | |
3224 | && h->root.type != bfd_link_hash_defweak) | |
3225 | || htab->srelbss == NULL) | |
3226 | abort (); | |
70256ad8 AJ |
3227 | |
3228 | rela.r_offset = (h->root.u.def.value | |
3229 | + h->root.u.def.section->output_section->vma | |
3230 | + h->root.u.def.section->output_offset); | |
3231 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_COPY); | |
3232 | rela.r_addend = 0; | |
947216bf AM |
3233 | loc = htab->srelbss->contents; |
3234 | loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 3235 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 AJ |
3236 | } |
3237 | ||
3238 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
3239 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
22edb2f1 | 3240 | || h == htab->elf.hgot) |
70256ad8 AJ |
3241 | sym->st_shndx = SHN_ABS; |
3242 | ||
b34976b6 | 3243 | return TRUE; |
70256ad8 AJ |
3244 | } |
3245 | ||
c434dee6 AJ |
3246 | /* Used to decide how to sort relocs in an optimal manner for the |
3247 | dynamic linker, before writing them out. */ | |
3248 | ||
3249 | static enum elf_reloc_type_class | |
27482721 | 3250 | elf64_x86_64_reloc_type_class (const Elf_Internal_Rela *rela) |
c434dee6 AJ |
3251 | { |
3252 | switch ((int) ELF64_R_TYPE (rela->r_info)) | |
3253 | { | |
3254 | case R_X86_64_RELATIVE: | |
3255 | return reloc_class_relative; | |
3256 | case R_X86_64_JUMP_SLOT: | |
3257 | return reloc_class_plt; | |
3258 | case R_X86_64_COPY: | |
3259 | return reloc_class_copy; | |
3260 | default: | |
3261 | return reloc_class_normal; | |
3262 | } | |
3263 | } | |
3264 | ||
70256ad8 AJ |
3265 | /* Finish up the dynamic sections. */ |
3266 | ||
b34976b6 | 3267 | static bfd_boolean |
27482721 | 3268 | elf64_x86_64_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
70256ad8 | 3269 | { |
c434dee6 | 3270 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
3271 | bfd *dynobj; |
3272 | asection *sdyn; | |
70256ad8 | 3273 | |
c434dee6 AJ |
3274 | htab = elf64_x86_64_hash_table (info); |
3275 | dynobj = htab->elf.dynobj; | |
70256ad8 AJ |
3276 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
3277 | ||
c434dee6 | 3278 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 3279 | { |
70256ad8 AJ |
3280 | Elf64_External_Dyn *dyncon, *dynconend; |
3281 | ||
c434dee6 AJ |
3282 | if (sdyn == NULL || htab->sgot == NULL) |
3283 | abort (); | |
70256ad8 AJ |
3284 | |
3285 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
eea6121a | 3286 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); |
70256ad8 AJ |
3287 | for (; dyncon < dynconend; dyncon++) |
3288 | { | |
3289 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
3290 | asection *s; |
3291 | ||
3292 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); | |
3293 | ||
3294 | switch (dyn.d_tag) | |
3295 | { | |
3296 | default: | |
053579d7 | 3297 | continue; |
70256ad8 AJ |
3298 | |
3299 | case DT_PLTGOT: | |
8c37241b JJ |
3300 | s = htab->sgotplt; |
3301 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
c434dee6 | 3302 | break; |
70256ad8 AJ |
3303 | |
3304 | case DT_JMPREL: | |
c434dee6 AJ |
3305 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
3306 | break; | |
70256ad8 | 3307 | |
c434dee6 AJ |
3308 | case DT_PLTRELSZ: |
3309 | s = htab->srelplt->output_section; | |
eea6121a | 3310 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
3311 | break; |
3312 | ||
3313 | case DT_RELASZ: | |
c434dee6 AJ |
3314 | /* The procedure linkage table relocs (DT_JMPREL) should |
3315 | not be included in the overall relocs (DT_RELA). | |
3316 | Therefore, we override the DT_RELASZ entry here to | |
3317 | make it not include the JMPREL relocs. Since the | |
3318 | linker script arranges for .rela.plt to follow all | |
3319 | other relocation sections, we don't have to worry | |
3320 | about changing the DT_RELA entry. */ | |
3321 | if (htab->srelplt != NULL) | |
70256ad8 | 3322 | { |
c434dee6 | 3323 | s = htab->srelplt->output_section; |
eea6121a | 3324 | dyn.d_un.d_val -= s->size; |
70256ad8 AJ |
3325 | } |
3326 | break; | |
67a4f2b7 AO |
3327 | |
3328 | case DT_TLSDESC_PLT: | |
3329 | s = htab->splt; | |
3330 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset | |
3331 | + htab->tlsdesc_plt; | |
3332 | break; | |
3333 | ||
3334 | case DT_TLSDESC_GOT: | |
3335 | s = htab->sgot; | |
3336 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset | |
3337 | + htab->tlsdesc_got; | |
3338 | break; | |
70256ad8 | 3339 | } |
c434dee6 | 3340 | |
70256ad8 AJ |
3341 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
3342 | } | |
3343 | ||
c434dee6 | 3344 | /* Fill in the special first entry in the procedure linkage table. */ |
eea6121a | 3345 | if (htab->splt && htab->splt->size > 0) |
70256ad8 | 3346 | { |
653165cc | 3347 | /* Fill in the first entry in the procedure linkage table. */ |
c434dee6 AJ |
3348 | memcpy (htab->splt->contents, elf64_x86_64_plt0_entry, |
3349 | PLT_ENTRY_SIZE); | |
653165cc AJ |
3350 | /* Add offset for pushq GOT+8(%rip), since the instruction |
3351 | uses 6 bytes subtract this value. */ | |
3352 | bfd_put_32 (output_bfd, | |
c434dee6 AJ |
3353 | (htab->sgotplt->output_section->vma |
3354 | + htab->sgotplt->output_offset | |
653165cc | 3355 | + 8 |
c434dee6 AJ |
3356 | - htab->splt->output_section->vma |
3357 | - htab->splt->output_offset | |
653165cc | 3358 | - 6), |
c434dee6 | 3359 | htab->splt->contents + 2); |
653165cc AJ |
3360 | /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to |
3361 | the end of the instruction. */ | |
3362 | bfd_put_32 (output_bfd, | |
c434dee6 AJ |
3363 | (htab->sgotplt->output_section->vma |
3364 | + htab->sgotplt->output_offset | |
653165cc | 3365 | + 16 |
c434dee6 AJ |
3366 | - htab->splt->output_section->vma |
3367 | - htab->splt->output_offset | |
653165cc | 3368 | - 12), |
c434dee6 | 3369 | htab->splt->contents + 8); |
653165cc | 3370 | |
c434dee6 AJ |
3371 | elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize = |
3372 | PLT_ENTRY_SIZE; | |
67a4f2b7 AO |
3373 | |
3374 | if (htab->tlsdesc_plt) | |
3375 | { | |
3376 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
3377 | htab->sgot->contents + htab->tlsdesc_got); | |
3378 | ||
3379 | memcpy (htab->splt->contents + htab->tlsdesc_plt, | |
3380 | elf64_x86_64_plt0_entry, | |
3381 | PLT_ENTRY_SIZE); | |
3382 | ||
3383 | /* Add offset for pushq GOT+8(%rip), since the | |
3384 | instruction uses 6 bytes subtract this value. */ | |
3385 | bfd_put_32 (output_bfd, | |
3386 | (htab->sgotplt->output_section->vma | |
3387 | + htab->sgotplt->output_offset | |
3388 | + 8 | |
3389 | - htab->splt->output_section->vma | |
3390 | - htab->splt->output_offset | |
3391 | - htab->tlsdesc_plt | |
3392 | - 6), | |
3393 | htab->splt->contents + htab->tlsdesc_plt + 2); | |
3394 | /* Add offset for jmp *GOT+TDG(%rip), where TGD stands for | |
3395 | htab->tlsdesc_got. The 12 is the offset to the end of | |
3396 | the instruction. */ | |
3397 | bfd_put_32 (output_bfd, | |
3398 | (htab->sgot->output_section->vma | |
3399 | + htab->sgot->output_offset | |
3400 | + htab->tlsdesc_got | |
3401 | - htab->splt->output_section->vma | |
3402 | - htab->splt->output_offset | |
3403 | - htab->tlsdesc_plt | |
3404 | - 12), | |
3405 | htab->splt->contents + htab->tlsdesc_plt + 8); | |
3406 | } | |
70256ad8 | 3407 | } |
70256ad8 AJ |
3408 | } |
3409 | ||
c434dee6 | 3410 | if (htab->sgotplt) |
70256ad8 | 3411 | { |
c434dee6 | 3412 | /* Fill in the first three entries in the global offset table. */ |
eea6121a | 3413 | if (htab->sgotplt->size > 0) |
c434dee6 AJ |
3414 | { |
3415 | /* Set the first entry in the global offset table to the address of | |
3416 | the dynamic section. */ | |
3417 | if (sdyn == NULL) | |
3418 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents); | |
3419 | else | |
3420 | bfd_put_64 (output_bfd, | |
3421 | sdyn->output_section->vma + sdyn->output_offset, | |
3422 | htab->sgotplt->contents); | |
3423 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ | |
3424 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE); | |
3425 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE*2); | |
3426 | } | |
70256ad8 | 3427 | |
c434dee6 AJ |
3428 | elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = |
3429 | GOT_ENTRY_SIZE; | |
3430 | } | |
70256ad8 | 3431 | |
eea6121a | 3432 | if (htab->sgot && htab->sgot->size > 0) |
8c37241b JJ |
3433 | elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize |
3434 | = GOT_ENTRY_SIZE; | |
3435 | ||
b34976b6 | 3436 | return TRUE; |
8d88c4ca NC |
3437 | } |
3438 | ||
4c45e5c9 JJ |
3439 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
3440 | or (bfd_vma) -1 if it should not be included. */ | |
3441 | ||
3442 | static bfd_vma | |
3443 | elf64_x86_64_plt_sym_val (bfd_vma i, const asection *plt, | |
3444 | const arelent *rel ATTRIBUTE_UNUSED) | |
3445 | { | |
3446 | return plt->vma + (i + 1) * PLT_ENTRY_SIZE; | |
3447 | } | |
8df9fc9d | 3448 | |
d2b2c203 DJ |
3449 | /* Handle an x86-64 specific section when reading an object file. This |
3450 | is called when elfcode.h finds a section with an unknown type. */ | |
3451 | ||
3452 | static bfd_boolean | |
6dc132d9 L |
3453 | elf64_x86_64_section_from_shdr (bfd *abfd, |
3454 | Elf_Internal_Shdr *hdr, | |
3455 | const char *name, | |
3456 | int shindex) | |
d2b2c203 DJ |
3457 | { |
3458 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
3459 | return FALSE; | |
3460 | ||
6dc132d9 | 3461 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
3462 | return FALSE; |
3463 | ||
3464 | return TRUE; | |
3465 | } | |
3466 | ||
3b22753a L |
3467 | /* Hook called by the linker routine which adds symbols from an object |
3468 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
3469 | of .bss. */ | |
3470 | ||
3471 | static bfd_boolean | |
3472 | elf64_x86_64_add_symbol_hook (bfd *abfd, | |
3473 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
3474 | Elf_Internal_Sym *sym, | |
3475 | const char **namep ATTRIBUTE_UNUSED, | |
3476 | flagword *flagsp ATTRIBUTE_UNUSED, | |
3477 | asection **secp, bfd_vma *valp) | |
3478 | { | |
3479 | asection *lcomm; | |
3480 | ||
3481 | switch (sym->st_shndx) | |
3482 | { | |
3483 | case SHN_X86_64_LCOMMON: | |
3484 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
3485 | if (lcomm == NULL) | |
3486 | { | |
3487 | lcomm = bfd_make_section_with_flags (abfd, | |
3488 | "LARGE_COMMON", | |
3489 | (SEC_ALLOC | |
3490 | | SEC_IS_COMMON | |
3491 | | SEC_LINKER_CREATED)); | |
3492 | if (lcomm == NULL) | |
3493 | return FALSE; | |
3494 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
3495 | } | |
3496 | *secp = lcomm; | |
3497 | *valp = sym->st_size; | |
3498 | break; | |
3499 | } | |
3500 | return TRUE; | |
3501 | } | |
3502 | ||
3503 | ||
3504 | /* Given a BFD section, try to locate the corresponding ELF section | |
3505 | index. */ | |
3506 | ||
3507 | static bfd_boolean | |
3508 | elf64_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, | |
3509 | asection *sec, int *index) | |
3510 | { | |
3511 | if (sec == &_bfd_elf_large_com_section) | |
3512 | { | |
3513 | *index = SHN_X86_64_LCOMMON; | |
3514 | return TRUE; | |
3515 | } | |
3516 | return FALSE; | |
3517 | } | |
3518 | ||
3519 | /* Process a symbol. */ | |
3520 | ||
3521 | static void | |
3522 | elf64_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, | |
3523 | asymbol *asym) | |
3524 | { | |
3525 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
3526 | ||
3527 | switch (elfsym->internal_elf_sym.st_shndx) | |
3528 | { | |
3529 | case SHN_X86_64_LCOMMON: | |
3530 | asym->section = &_bfd_elf_large_com_section; | |
3531 | asym->value = elfsym->internal_elf_sym.st_size; | |
3532 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
3533 | asym->flags &= ~BSF_GLOBAL; | |
3534 | break; | |
3535 | } | |
3536 | } | |
3537 | ||
3538 | static bfd_boolean | |
3539 | elf64_x86_64_common_definition (Elf_Internal_Sym *sym) | |
3540 | { | |
3541 | return (sym->st_shndx == SHN_COMMON | |
3542 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
3543 | } | |
3544 | ||
3545 | static unsigned int | |
3546 | elf64_x86_64_common_section_index (asection *sec) | |
3547 | { | |
3548 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
3549 | return SHN_COMMON; | |
3550 | else | |
3551 | return SHN_X86_64_LCOMMON; | |
3552 | } | |
3553 | ||
3554 | static asection * | |
3555 | elf64_x86_64_common_section (asection *sec) | |
3556 | { | |
3557 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
3558 | return bfd_com_section_ptr; | |
3559 | else | |
3560 | return &_bfd_elf_large_com_section; | |
3561 | } | |
3562 | ||
3563 | static bfd_boolean | |
3564 | elf64_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
3565 | struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED, | |
3566 | struct elf_link_hash_entry *h, | |
3567 | Elf_Internal_Sym *sym, | |
00492999 | 3568 | asection **psec, |
3b22753a L |
3569 | bfd_vma *pvalue ATTRIBUTE_UNUSED, |
3570 | unsigned int *pold_alignment ATTRIBUTE_UNUSED, | |
3571 | bfd_boolean *skip ATTRIBUTE_UNUSED, | |
3572 | bfd_boolean *override ATTRIBUTE_UNUSED, | |
3573 | bfd_boolean *type_change_ok ATTRIBUTE_UNUSED, | |
3574 | bfd_boolean *size_change_ok ATTRIBUTE_UNUSED, | |
3575 | bfd_boolean *newdef ATTRIBUTE_UNUSED, | |
3576 | bfd_boolean *newdyn, | |
3577 | bfd_boolean *newdyncommon ATTRIBUTE_UNUSED, | |
3578 | bfd_boolean *newweak ATTRIBUTE_UNUSED, | |
3579 | bfd *abfd ATTRIBUTE_UNUSED, | |
3580 | asection **sec, | |
3581 | bfd_boolean *olddef ATTRIBUTE_UNUSED, | |
3582 | bfd_boolean *olddyn, | |
3583 | bfd_boolean *olddyncommon ATTRIBUTE_UNUSED, | |
3584 | bfd_boolean *oldweak ATTRIBUTE_UNUSED, | |
00492999 | 3585 | bfd *oldbfd, |
3b22753a L |
3586 | asection **oldsec) |
3587 | { | |
3588 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
3589 | normal common symbol. We turn the large common symbol into a |
3590 | normal one. */ | |
3b22753a L |
3591 | if (!*olddyn |
3592 | && h->root.type == bfd_link_hash_common | |
3593 | && !*newdyn | |
3594 | && bfd_is_com_section (*sec) | |
00492999 | 3595 | && *oldsec != *sec) |
3b22753a | 3596 | { |
00492999 L |
3597 | if (sym->st_shndx == SHN_COMMON |
3598 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0) | |
3599 | { | |
3600 | h->root.u.c.p->section | |
3601 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
3602 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
3603 | } | |
3604 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
3605 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0) | |
3606 | *psec = *sec = bfd_com_section_ptr; | |
3b22753a L |
3607 | } |
3608 | ||
3609 | return TRUE; | |
3610 | } | |
3611 | ||
3612 | static int | |
a6b96beb AM |
3613 | elf64_x86_64_additional_program_headers (bfd *abfd, |
3614 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
3615 | { |
3616 | asection *s; | |
3617 | int count = 0; | |
3618 | ||
3619 | /* Check to see if we need a large readonly segment. */ | |
3620 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
3621 | if (s && (s->flags & SEC_LOAD)) | |
3622 | count++; | |
3623 | ||
3624 | /* Check to see if we need a large data segment. Since .lbss sections | |
3625 | is placed right after the .bss section, there should be no need for | |
3626 | a large data segment just because of .lbss. */ | |
3627 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
3628 | if (s && (s->flags & SEC_LOAD)) | |
3629 | count++; | |
3630 | ||
3631 | return count; | |
3632 | } | |
3633 | ||
fdc90cb4 JJ |
3634 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
3635 | ||
3636 | static bfd_boolean | |
3637 | elf64_x86_64_hash_symbol (struct elf_link_hash_entry *h) | |
3638 | { | |
3639 | if (h->plt.offset != (bfd_vma) -1 | |
3640 | && !h->def_regular | |
3641 | && !h->pointer_equality_needed) | |
3642 | return FALSE; | |
3643 | ||
3644 | return _bfd_elf_hash_symbol (h); | |
3645 | } | |
3646 | ||
3b22753a L |
3647 | static const struct bfd_elf_special_section |
3648 | elf64_x86_64_special_sections[]= | |
3649 | { | |
0112cd26 NC |
3650 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
3651 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
3652 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
3653 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
3654 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
3655 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
3656 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
3657 | }; |
3658 | ||
70256ad8 AJ |
3659 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec |
3660 | #define TARGET_LITTLE_NAME "elf64-x86-64" | |
3661 | #define ELF_ARCH bfd_arch_i386 | |
3662 | #define ELF_MACHINE_CODE EM_X86_64 | |
f7661549 | 3663 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 3664 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 3665 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
3666 | |
3667 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 3668 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
3669 | #define elf_backend_want_got_plt 1 |
3670 | #define elf_backend_plt_readonly 1 | |
3671 | #define elf_backend_want_plt_sym 0 | |
3672 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 3673 | #define elf_backend_rela_normal 1 |
70256ad8 AJ |
3674 | |
3675 | #define elf_info_to_howto elf64_x86_64_info_to_howto | |
70256ad8 | 3676 | |
70256ad8 AJ |
3677 | #define bfd_elf64_bfd_link_hash_table_create \ |
3678 | elf64_x86_64_link_hash_table_create | |
407443a3 | 3679 | #define bfd_elf64_bfd_reloc_type_lookup elf64_x86_64_reloc_type_lookup |
157090f7 AM |
3680 | #define bfd_elf64_bfd_reloc_name_lookup \ |
3681 | elf64_x86_64_reloc_name_lookup | |
70256ad8 AJ |
3682 | |
3683 | #define elf_backend_adjust_dynamic_symbol elf64_x86_64_adjust_dynamic_symbol | |
3684 | #define elf_backend_check_relocs elf64_x86_64_check_relocs | |
c434dee6 AJ |
3685 | #define elf_backend_copy_indirect_symbol elf64_x86_64_copy_indirect_symbol |
3686 | #define elf_backend_create_dynamic_sections elf64_x86_64_create_dynamic_sections | |
3687 | #define elf_backend_finish_dynamic_sections elf64_x86_64_finish_dynamic_sections | |
70256ad8 AJ |
3688 | #define elf_backend_finish_dynamic_symbol elf64_x86_64_finish_dynamic_symbol |
3689 | #define elf_backend_gc_mark_hook elf64_x86_64_gc_mark_hook | |
3690 | #define elf_backend_gc_sweep_hook elf64_x86_64_gc_sweep_hook | |
3bab7989 ML |
3691 | #define elf_backend_grok_prstatus elf64_x86_64_grok_prstatus |
3692 | #define elf_backend_grok_psinfo elf64_x86_64_grok_psinfo | |
c434dee6 | 3693 | #define elf_backend_reloc_type_class elf64_x86_64_reloc_type_class |
70256ad8 AJ |
3694 | #define elf_backend_relocate_section elf64_x86_64_relocate_section |
3695 | #define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections | |
67a4f2b7 | 3696 | #define elf_backend_always_size_sections elf64_x86_64_always_size_sections |
74541ad4 | 3697 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
4c45e5c9 | 3698 | #define elf_backend_plt_sym_val elf64_x86_64_plt_sym_val |
407443a3 | 3699 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
bffbf940 | 3700 | #define bfd_elf64_mkobject elf64_x86_64_mkobject |
8d88c4ca | 3701 | |
d2b2c203 DJ |
3702 | #define elf_backend_section_from_shdr \ |
3703 | elf64_x86_64_section_from_shdr | |
3704 | ||
3b22753a L |
3705 | #define elf_backend_section_from_bfd_section \ |
3706 | elf64_x86_64_elf_section_from_bfd_section | |
3707 | #define elf_backend_add_symbol_hook \ | |
3708 | elf64_x86_64_add_symbol_hook | |
3709 | #define elf_backend_symbol_processing \ | |
3710 | elf64_x86_64_symbol_processing | |
3711 | #define elf_backend_common_section_index \ | |
3712 | elf64_x86_64_common_section_index | |
3713 | #define elf_backend_common_section \ | |
3714 | elf64_x86_64_common_section | |
3715 | #define elf_backend_common_definition \ | |
3716 | elf64_x86_64_common_definition | |
3717 | #define elf_backend_merge_symbol \ | |
3718 | elf64_x86_64_merge_symbol | |
3719 | #define elf_backend_special_sections \ | |
3720 | elf64_x86_64_special_sections | |
3721 | #define elf_backend_additional_program_headers \ | |
3722 | elf64_x86_64_additional_program_headers | |
fdc90cb4 JJ |
3723 | #define elf_backend_hash_symbol \ |
3724 | elf64_x86_64_hash_symbol | |
3b22753a | 3725 | |
8d88c4ca | 3726 | #include "elf64-target.h" |
9d7cbccd NC |
3727 | |
3728 | /* FreeBSD support. */ | |
3729 | ||
3730 | #undef TARGET_LITTLE_SYM | |
3731 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec | |
3732 | #undef TARGET_LITTLE_NAME | |
3733 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
3734 | ||
d1036acb L |
3735 | #undef ELF_OSABI |
3736 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd NC |
3737 | |
3738 | #undef elf_backend_post_process_headers | |
d1036acb | 3739 | #define elf_backend_post_process_headers _bfd_elf_set_osabi |
9d7cbccd NC |
3740 | |
3741 | #undef elf64_bed | |
3742 | #define elf64_bed elf64_x86_64_fbsd_bed | |
3743 | ||
3744 | #include "elf64-target.h" |