Commit | Line | Data |
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8d88c4ca | 1 | /* X86-64 specific support for 64-bit ELF |
ae9a127f | 2 | Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
8d88c4ca NC |
3 | Contributed by Jan Hubicka <jh@suse.cz>. |
4 | ||
ae9a127f | 5 | This file is part of BFD, the Binary File Descriptor library. |
8d88c4ca | 6 | |
ae9a127f NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
8d88c4ca | 11 | |
ae9a127f NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
8d88c4ca | 16 | |
ae9a127f NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
8d88c4ca NC |
20 | |
21 | #include "bfd.h" | |
22 | #include "sysdep.h" | |
c434dee6 | 23 | #include "bfdlink.h" |
8d88c4ca NC |
24 | #include "libbfd.h" |
25 | #include "elf-bfd.h" | |
26 | ||
27 | #include "elf/x86-64.h" | |
28 | ||
8d88c4ca NC |
29 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
30 | #define MINUS_ONE (~ (bfd_vma) 0) | |
31 | ||
32 | /* The relocation "howto" table. Order of fields: | |
407443a3 AJ |
33 | type, size, bitsize, pc_relative, complain_on_overflow, |
34 | special_function, name, partial_inplace, src_mask, dst_pack, pcrel_offset. */ | |
70256ad8 AJ |
35 | static reloc_howto_type x86_64_elf_howto_table[] = |
36 | { | |
b34976b6 AM |
37 | HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
38 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, | |
39 | FALSE), | |
40 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
41 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, | |
42 | FALSE), | |
43 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
44 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, | |
45 | TRUE), | |
46 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
47 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, | |
48 | FALSE), | |
49 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
50 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, | |
51 | TRUE), | |
52 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
53 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, | |
54 | FALSE), | |
55 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
56 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, | |
57 | MINUS_ONE, FALSE), | |
58 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
59 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, | |
60 | MINUS_ONE, FALSE), | |
61 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
62 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, | |
63 | MINUS_ONE, FALSE), | |
64 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
65 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, | |
66 | 0xffffffff, TRUE), | |
67 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, | |
68 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
69 | FALSE), | |
70 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
71 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, | |
72 | FALSE), | |
73 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
74 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), | |
75 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
76 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), | |
77 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_signed, | |
78 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), | |
79 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
80 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), | |
81 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
82 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, | |
83 | MINUS_ONE, FALSE), | |
84 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
85 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, | |
86 | MINUS_ONE, FALSE), | |
87 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
88 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, | |
89 | MINUS_ONE, FALSE), | |
90 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
91 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, | |
92 | 0xffffffff, TRUE), | |
93 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
94 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, | |
95 | 0xffffffff, TRUE), | |
96 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
97 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, | |
98 | 0xffffffff, FALSE), | |
99 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
100 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, | |
101 | 0xffffffff, TRUE), | |
102 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
103 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, | |
104 | 0xffffffff, FALSE), | |
fe4770f4 AJ |
105 | |
106 | /* GNU extension to record C++ vtable hierarchy. */ | |
b34976b6 AM |
107 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
108 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
109 | |
110 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
111 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
112 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
113 | FALSE) | |
8d88c4ca NC |
114 | }; |
115 | ||
116 | /* Map BFD relocs to the x86_64 elf relocs. */ | |
70256ad8 AJ |
117 | struct elf_reloc_map |
118 | { | |
8d88c4ca NC |
119 | bfd_reloc_code_real_type bfd_reloc_val; |
120 | unsigned char elf_reloc_val; | |
121 | }; | |
122 | ||
dc810e39 | 123 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 124 | { |
70256ad8 AJ |
125 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
126 | { BFD_RELOC_64, R_X86_64_64, }, | |
127 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
128 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
129 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
130 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
131 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
132 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
133 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
134 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
135 | { BFD_RELOC_32, R_X86_64_32, }, | |
136 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
137 | { BFD_RELOC_16, R_X86_64_16, }, | |
138 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
139 | { BFD_RELOC_8, R_X86_64_8, }, | |
140 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
141 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
142 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
143 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
144 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
145 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
146 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
147 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
148 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
fe4770f4 AJ |
149 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
150 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
151 | }; |
152 | ||
8d88c4ca NC |
153 | static reloc_howto_type *elf64_x86_64_reloc_type_lookup |
154 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
155 | static void elf64_x86_64_info_to_howto | |
947216bf | 156 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
b34976b6 | 157 | static bfd_boolean elf64_x86_64_grok_prstatus |
3bab7989 | 158 | PARAMS ((bfd *, Elf_Internal_Note *)); |
b34976b6 | 159 | static bfd_boolean elf64_x86_64_grok_psinfo |
3bab7989 | 160 | PARAMS ((bfd *, Elf_Internal_Note *)); |
8d88c4ca NC |
161 | static struct bfd_link_hash_table *elf64_x86_64_link_hash_table_create |
162 | PARAMS ((bfd *)); | |
bffbf940 JJ |
163 | static int elf64_x86_64_tls_transition |
164 | PARAMS ((struct bfd_link_info *, int, int)); | |
b34976b6 | 165 | static bfd_boolean elf64_x86_64_mkobject |
bffbf940 | 166 | PARAMS((bfd *)); |
b34976b6 AM |
167 | static bfd_boolean elf64_x86_64_elf_object_p PARAMS ((bfd *abfd)); |
168 | static bfd_boolean create_got_section | |
c434dee6 | 169 | PARAMS((bfd *, struct bfd_link_info *)); |
b34976b6 | 170 | static bfd_boolean elf64_x86_64_create_dynamic_sections |
c434dee6 AJ |
171 | PARAMS((bfd *, struct bfd_link_info *)); |
172 | static void elf64_x86_64_copy_indirect_symbol | |
b48fa14c AM |
173 | PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *, |
174 | struct elf_link_hash_entry *)); | |
b34976b6 | 175 | static bfd_boolean elf64_x86_64_check_relocs |
1e1b3bc2 AJ |
176 | PARAMS ((bfd *, struct bfd_link_info *, asection *sec, |
177 | const Elf_Internal_Rela *)); | |
178 | static asection *elf64_x86_64_gc_mark_hook | |
1e2f5b6e | 179 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
1e1b3bc2 AJ |
180 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
181 | ||
b34976b6 | 182 | static bfd_boolean elf64_x86_64_gc_sweep_hook |
1e1b3bc2 AJ |
183 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
184 | const Elf_Internal_Rela *)); | |
70256ad8 | 185 | |
c434dee6 | 186 | static struct bfd_hash_entry *link_hash_newfunc |
70256ad8 | 187 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
b34976b6 | 188 | static bfd_boolean elf64_x86_64_adjust_dynamic_symbol |
70256ad8 AJ |
189 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
190 | ||
b34976b6 | 191 | static bfd_boolean allocate_dynrelocs |
c434dee6 | 192 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 193 | static bfd_boolean readonly_dynrelocs |
c434dee6 | 194 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 195 | static bfd_boolean elf64_x86_64_size_dynamic_sections |
70256ad8 | 196 | PARAMS ((bfd *, struct bfd_link_info *)); |
bffbf940 JJ |
197 | static bfd_vma dtpoff_base |
198 | PARAMS ((struct bfd_link_info *)); | |
199 | static bfd_vma tpoff | |
200 | PARAMS ((struct bfd_link_info *, bfd_vma)); | |
b34976b6 | 201 | static bfd_boolean elf64_x86_64_relocate_section |
8d88c4ca | 202 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
407443a3 | 203 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
b34976b6 | 204 | static bfd_boolean elf64_x86_64_finish_dynamic_symbol |
70256ad8 AJ |
205 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
206 | Elf_Internal_Sym *sym)); | |
b34976b6 | 207 | static bfd_boolean elf64_x86_64_finish_dynamic_sections |
70256ad8 | 208 | PARAMS ((bfd *, struct bfd_link_info *)); |
f51e552e AM |
209 | static enum elf_reloc_type_class elf64_x86_64_reloc_type_class |
210 | PARAMS ((const Elf_Internal_Rela *)); | |
8d88c4ca NC |
211 | |
212 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
213 | static reloc_howto_type * | |
214 | elf64_x86_64_reloc_type_lookup (abfd, code) | |
215 | bfd *abfd ATTRIBUTE_UNUSED; | |
216 | bfd_reloc_code_real_type code; | |
217 | { | |
218 | unsigned int i; | |
219 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); | |
220 | i++) | |
221 | { | |
222 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
ffaef159 | 223 | return &x86_64_elf_howto_table[i]; |
8d88c4ca NC |
224 | } |
225 | return 0; | |
226 | } | |
227 | ||
8d88c4ca | 228 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 229 | |
8d88c4ca NC |
230 | static void |
231 | elf64_x86_64_info_to_howto (abfd, cache_ptr, dst) | |
232 | bfd *abfd ATTRIBUTE_UNUSED; | |
233 | arelent *cache_ptr; | |
947216bf | 234 | Elf_Internal_Rela *dst; |
8d88c4ca | 235 | { |
fe4770f4 | 236 | unsigned r_type, i; |
8d88c4ca NC |
237 | |
238 | r_type = ELF64_R_TYPE (dst->r_info); | |
fe4770f4 AJ |
239 | if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT) |
240 | { | |
bffbf940 | 241 | BFD_ASSERT (r_type <= (unsigned int) R_X86_64_TPOFF32); |
fe4770f4 AJ |
242 | i = r_type; |
243 | } | |
244 | else | |
245 | { | |
246 | BFD_ASSERT (r_type < (unsigned int) R_X86_64_max); | |
bffbf940 | 247 | i = r_type - ((unsigned int) R_X86_64_GNU_VTINHERIT - R_X86_64_TPOFF32 - 1); |
fe4770f4 AJ |
248 | } |
249 | cache_ptr->howto = &x86_64_elf_howto_table[i]; | |
8d88c4ca NC |
250 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
251 | } | |
70256ad8 | 252 | \f |
3bab7989 | 253 | /* Support for core dump NOTE sections. */ |
b34976b6 | 254 | static bfd_boolean |
3bab7989 ML |
255 | elf64_x86_64_grok_prstatus (abfd, note) |
256 | bfd *abfd; | |
257 | Elf_Internal_Note *note; | |
258 | { | |
259 | int offset; | |
260 | size_t raw_size; | |
261 | ||
262 | switch (note->descsz) | |
263 | { | |
264 | default: | |
b34976b6 | 265 | return FALSE; |
3bab7989 ML |
266 | |
267 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ | |
268 | /* pr_cursig */ | |
cedb70c5 | 269 | elf_tdata (abfd)->core_signal |
3bab7989 ML |
270 | = bfd_get_16 (abfd, note->descdata + 12); |
271 | ||
272 | /* pr_pid */ | |
cedb70c5 | 273 | elf_tdata (abfd)->core_pid |
3bab7989 ML |
274 | = bfd_get_32 (abfd, note->descdata + 32); |
275 | ||
276 | /* pr_reg */ | |
277 | offset = 112; | |
278 | raw_size = 216; | |
279 | ||
280 | break; | |
281 | } | |
282 | ||
283 | /* Make a ".reg/999" section. */ | |
284 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
285 | raw_size, note->descpos + offset); | |
286 | } | |
287 | ||
b34976b6 | 288 | static bfd_boolean |
3bab7989 ML |
289 | elf64_x86_64_grok_psinfo (abfd, note) |
290 | bfd *abfd; | |
291 | Elf_Internal_Note *note; | |
292 | { | |
293 | switch (note->descsz) | |
294 | { | |
295 | default: | |
b34976b6 | 296 | return FALSE; |
3bab7989 ML |
297 | |
298 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ | |
299 | elf_tdata (abfd)->core_program | |
300 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); | |
301 | elf_tdata (abfd)->core_command | |
302 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); | |
303 | } | |
304 | ||
305 | /* Note that for some reason, a spurious space is tacked | |
306 | onto the end of the args in some (at least one anyway) | |
307 | implementations, so strip it off if it exists. */ | |
308 | ||
309 | { | |
310 | char *command = elf_tdata (abfd)->core_command; | |
311 | int n = strlen (command); | |
312 | ||
313 | if (0 < n && command[n - 1] == ' ') | |
314 | command[n - 1] = '\0'; | |
315 | } | |
316 | ||
b34976b6 | 317 | return TRUE; |
3bab7989 ML |
318 | } |
319 | \f | |
407443a3 | 320 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 321 | |
407443a3 | 322 | /* The name of the dynamic interpreter. This is put in the .interp |
70256ad8 AJ |
323 | section. */ |
324 | ||
407443a3 | 325 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
70256ad8 AJ |
326 | |
327 | /* The size in bytes of an entry in the global offset table. */ | |
328 | ||
329 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 330 | |
70256ad8 | 331 | /* The size in bytes of an entry in the procedure linkage table. */ |
8d88c4ca | 332 | |
70256ad8 AJ |
333 | #define PLT_ENTRY_SIZE 16 |
334 | ||
335 | /* The first entry in a procedure linkage table looks like this. See the | |
336 | SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */ | |
337 | ||
338 | static const bfd_byte elf64_x86_64_plt0_entry[PLT_ENTRY_SIZE] = | |
339 | { | |
653165cc AJ |
340 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
341 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
342 | 0x90, 0x90, 0x90, 0x90 /* pad out to 16 bytes with nops. */ | |
70256ad8 AJ |
343 | }; |
344 | ||
345 | /* Subsequent entries in a procedure linkage table look like this. */ | |
346 | ||
347 | static const bfd_byte elf64_x86_64_plt_entry[PLT_ENTRY_SIZE] = | |
348 | { | |
653165cc | 349 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 350 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 351 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
352 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
353 | 0xe9, /* jmp relative */ | |
354 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
355 | }; | |
356 | ||
357 | /* The x86-64 linker needs to keep track of the number of relocs that | |
985142a4 | 358 | it decides to copy as dynamic relocs in check_relocs for each symbol. |
c434dee6 AJ |
359 | This is so that it can later discard them if they are found to be |
360 | unnecessary. We store the information in a field extending the | |
361 | regular ELF linker hash table. */ | |
70256ad8 | 362 | |
c434dee6 | 363 | struct elf64_x86_64_dyn_relocs |
70256ad8 AJ |
364 | { |
365 | /* Next section. */ | |
c434dee6 AJ |
366 | struct elf64_x86_64_dyn_relocs *next; |
367 | ||
368 | /* The input section of the reloc. */ | |
369 | asection *sec; | |
370 | ||
371 | /* Total number of relocs copied for the input section. */ | |
70256ad8 | 372 | bfd_size_type count; |
c434dee6 AJ |
373 | |
374 | /* Number of pc-relative relocs copied for the input section. */ | |
375 | bfd_size_type pc_count; | |
70256ad8 AJ |
376 | }; |
377 | ||
378 | /* x86-64 ELF linker hash entry. */ | |
379 | ||
380 | struct elf64_x86_64_link_hash_entry | |
381 | { | |
c434dee6 | 382 | struct elf_link_hash_entry elf; |
70256ad8 | 383 | |
c434dee6 AJ |
384 | /* Track dynamic relocs copied for this symbol. */ |
385 | struct elf64_x86_64_dyn_relocs *dyn_relocs; | |
bffbf940 JJ |
386 | |
387 | #define GOT_UNKNOWN 0 | |
388 | #define GOT_NORMAL 1 | |
389 | #define GOT_TLS_GD 2 | |
390 | #define GOT_TLS_IE 3 | |
391 | unsigned char tls_type; | |
392 | }; | |
393 | ||
394 | #define elf64_x86_64_hash_entry(ent) \ | |
395 | ((struct elf64_x86_64_link_hash_entry *)(ent)) | |
396 | ||
397 | struct elf64_x86_64_obj_tdata | |
398 | { | |
399 | struct elf_obj_tdata root; | |
400 | ||
401 | /* tls_type for each local got entry. */ | |
402 | char *local_got_tls_type; | |
70256ad8 AJ |
403 | }; |
404 | ||
bffbf940 JJ |
405 | #define elf64_x86_64_tdata(abfd) \ |
406 | ((struct elf64_x86_64_obj_tdata *) (abfd)->tdata.any) | |
407 | ||
408 | #define elf64_x86_64_local_got_tls_type(abfd) \ | |
409 | (elf64_x86_64_tdata (abfd)->local_got_tls_type) | |
410 | ||
411 | ||
c434dee6 | 412 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 413 | |
407443a3 AJ |
414 | struct elf64_x86_64_link_hash_table |
415 | { | |
c434dee6 | 416 | struct elf_link_hash_table elf; |
70256ad8 | 417 | |
c434dee6 AJ |
418 | /* Short-cuts to get to dynamic linker sections. */ |
419 | asection *sgot; | |
420 | asection *sgotplt; | |
421 | asection *srelgot; | |
422 | asection *splt; | |
423 | asection *srelplt; | |
424 | asection *sdynbss; | |
425 | asection *srelbss; | |
70256ad8 | 426 | |
bffbf940 JJ |
427 | union { |
428 | bfd_signed_vma refcount; | |
429 | bfd_vma offset; | |
430 | } tls_ld_got; | |
431 | ||
c434dee6 AJ |
432 | /* Small local sym to section mapping cache. */ |
433 | struct sym_sec_cache sym_sec; | |
434 | }; | |
70256ad8 AJ |
435 | |
436 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca NC |
437 | |
438 | #define elf64_x86_64_hash_table(p) \ | |
439 | ((struct elf64_x86_64_link_hash_table *) ((p)->hash)) | |
440 | ||
407443a3 | 441 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
442 | |
443 | static struct bfd_hash_entry * | |
c434dee6 | 444 | link_hash_newfunc (entry, table, string) |
70256ad8 AJ |
445 | struct bfd_hash_entry *entry; |
446 | struct bfd_hash_table *table; | |
447 | const char *string; | |
448 | { | |
70256ad8 | 449 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
450 | subclass. */ |
451 | if (entry == NULL) | |
452 | { | |
453 | entry = bfd_hash_allocate (table, | |
454 | sizeof (struct elf64_x86_64_link_hash_entry)); | |
455 | if (entry == NULL) | |
456 | return entry; | |
457 | } | |
70256ad8 AJ |
458 | |
459 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
460 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
461 | if (entry != NULL) | |
70256ad8 | 462 | { |
c434dee6 AJ |
463 | struct elf64_x86_64_link_hash_entry *eh; |
464 | ||
465 | eh = (struct elf64_x86_64_link_hash_entry *) entry; | |
466 | eh->dyn_relocs = NULL; | |
bffbf940 | 467 | eh->tls_type = GOT_UNKNOWN; |
70256ad8 AJ |
468 | } |
469 | ||
c434dee6 | 470 | return entry; |
70256ad8 AJ |
471 | } |
472 | ||
8d88c4ca NC |
473 | /* Create an X86-64 ELF linker hash table. */ |
474 | ||
475 | static struct bfd_link_hash_table * | |
476 | elf64_x86_64_link_hash_table_create (abfd) | |
477 | bfd *abfd; | |
478 | { | |
479 | struct elf64_x86_64_link_hash_table *ret; | |
dc810e39 | 480 | bfd_size_type amt = sizeof (struct elf64_x86_64_link_hash_table); |
8d88c4ca | 481 | |
e2d34d7d | 482 | ret = (struct elf64_x86_64_link_hash_table *) bfd_malloc (amt); |
c434dee6 | 483 | if (ret == NULL) |
8d88c4ca NC |
484 | return NULL; |
485 | ||
c434dee6 | 486 | if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc)) |
8d88c4ca | 487 | { |
e2d34d7d | 488 | free (ret); |
8d88c4ca NC |
489 | return NULL; |
490 | } | |
491 | ||
c434dee6 AJ |
492 | ret->sgot = NULL; |
493 | ret->sgotplt = NULL; | |
494 | ret->srelgot = NULL; | |
495 | ret->splt = NULL; | |
496 | ret->srelplt = NULL; | |
497 | ret->sdynbss = NULL; | |
498 | ret->srelbss = NULL; | |
499 | ret->sym_sec.abfd = NULL; | |
bffbf940 | 500 | ret->tls_ld_got.refcount = 0; |
c434dee6 AJ |
501 | |
502 | return &ret->elf.root; | |
503 | } | |
504 | ||
505 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
506 | shortcuts to them in our hash table. */ | |
507 | ||
b34976b6 | 508 | static bfd_boolean |
c434dee6 AJ |
509 | create_got_section (dynobj, info) |
510 | bfd *dynobj; | |
511 | struct bfd_link_info *info; | |
512 | { | |
513 | struct elf64_x86_64_link_hash_table *htab; | |
514 | ||
515 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 516 | return FALSE; |
c434dee6 AJ |
517 | |
518 | htab = elf64_x86_64_hash_table (info); | |
519 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
520 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
521 | if (!htab->sgot || !htab->sgotplt) | |
522 | abort (); | |
523 | ||
524 | htab->srelgot = bfd_make_section (dynobj, ".rela.got"); | |
525 | if (htab->srelgot == NULL | |
526 | || ! bfd_set_section_flags (dynobj, htab->srelgot, | |
527 | (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
528 | | SEC_IN_MEMORY | SEC_LINKER_CREATED | |
529 | | SEC_READONLY)) | |
530 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) | |
b34976b6 AM |
531 | return FALSE; |
532 | return TRUE; | |
c434dee6 AJ |
533 | } |
534 | ||
535 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
536 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
537 | hash table. */ | |
538 | ||
b34976b6 | 539 | static bfd_boolean |
c434dee6 AJ |
540 | elf64_x86_64_create_dynamic_sections (dynobj, info) |
541 | bfd *dynobj; | |
542 | struct bfd_link_info *info; | |
543 | { | |
544 | struct elf64_x86_64_link_hash_table *htab; | |
545 | ||
546 | htab = elf64_x86_64_hash_table (info); | |
547 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
b34976b6 | 548 | return FALSE; |
c434dee6 AJ |
549 | |
550 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
b34976b6 | 551 | return FALSE; |
c434dee6 AJ |
552 | |
553 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
554 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
555 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
556 | if (!info->shared) | |
557 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
558 | ||
559 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
560 | || (!info->shared && !htab->srelbss)) | |
561 | abort (); | |
562 | ||
b34976b6 | 563 | return TRUE; |
c434dee6 AJ |
564 | } |
565 | ||
566 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
567 | ||
568 | static void | |
b48fa14c AM |
569 | elf64_x86_64_copy_indirect_symbol (bed, dir, ind) |
570 | struct elf_backend_data *bed; | |
c434dee6 AJ |
571 | struct elf_link_hash_entry *dir, *ind; |
572 | { | |
573 | struct elf64_x86_64_link_hash_entry *edir, *eind; | |
574 | ||
575 | edir = (struct elf64_x86_64_link_hash_entry *) dir; | |
576 | eind = (struct elf64_x86_64_link_hash_entry *) ind; | |
577 | ||
578 | if (eind->dyn_relocs != NULL) | |
579 | { | |
580 | if (edir->dyn_relocs != NULL) | |
581 | { | |
582 | struct elf64_x86_64_dyn_relocs **pp; | |
583 | struct elf64_x86_64_dyn_relocs *p; | |
584 | ||
585 | if (ind->root.type == bfd_link_hash_indirect) | |
586 | abort (); | |
587 | ||
588 | /* Add reloc counts against the weak sym to the strong sym | |
589 | list. Merge any entries against the same section. */ | |
590 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
591 | { | |
592 | struct elf64_x86_64_dyn_relocs *q; | |
593 | ||
594 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
595 | if (q->sec == p->sec) | |
596 | { | |
597 | q->pc_count += p->pc_count; | |
598 | q->count += p->count; | |
599 | *pp = p->next; | |
600 | break; | |
601 | } | |
602 | if (q == NULL) | |
603 | pp = &p->next; | |
604 | } | |
605 | *pp = edir->dyn_relocs; | |
606 | } | |
607 | ||
608 | edir->dyn_relocs = eind->dyn_relocs; | |
609 | eind->dyn_relocs = NULL; | |
610 | } | |
611 | ||
bffbf940 JJ |
612 | if (ind->root.type == bfd_link_hash_indirect |
613 | && dir->got.refcount <= 0) | |
614 | { | |
615 | edir->tls_type = eind->tls_type; | |
616 | eind->tls_type = GOT_UNKNOWN; | |
617 | } | |
618 | ||
b48fa14c | 619 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); |
8d88c4ca NC |
620 | } |
621 | ||
b34976b6 | 622 | static bfd_boolean |
bffbf940 | 623 | elf64_x86_64_mkobject (abfd) |
8d88c4ca NC |
624 | bfd *abfd; |
625 | { | |
bffbf940 JJ |
626 | bfd_size_type amt = sizeof (struct elf64_x86_64_obj_tdata); |
627 | abfd->tdata.any = bfd_zalloc (abfd, amt); | |
628 | if (abfd->tdata.any == NULL) | |
b34976b6 AM |
629 | return FALSE; |
630 | return TRUE; | |
bffbf940 JJ |
631 | } |
632 | ||
b34976b6 | 633 | static bfd_boolean |
bffbf940 JJ |
634 | elf64_x86_64_elf_object_p (abfd) |
635 | bfd *abfd; | |
636 | { | |
637 | /* Allocate our special target data. */ | |
638 | struct elf64_x86_64_obj_tdata *new_tdata; | |
639 | bfd_size_type amt = sizeof (struct elf64_x86_64_obj_tdata); | |
640 | new_tdata = bfd_zalloc (abfd, amt); | |
641 | if (new_tdata == NULL) | |
b34976b6 | 642 | return FALSE; |
bffbf940 JJ |
643 | new_tdata->root = *abfd->tdata.elf_obj_data; |
644 | abfd->tdata.any = new_tdata; | |
8d88c4ca NC |
645 | /* Set the right machine number for an x86-64 elf64 file. */ |
646 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 647 | return TRUE; |
8d88c4ca NC |
648 | } |
649 | ||
bffbf940 JJ |
650 | static int |
651 | elf64_x86_64_tls_transition (info, r_type, is_local) | |
652 | struct bfd_link_info *info; | |
653 | int r_type; | |
654 | int is_local; | |
655 | { | |
656 | if (info->shared) | |
657 | return r_type; | |
658 | ||
659 | switch (r_type) | |
660 | { | |
661 | case R_X86_64_TLSGD: | |
662 | case R_X86_64_GOTTPOFF: | |
663 | if (is_local) | |
664 | return R_X86_64_TPOFF32; | |
665 | return R_X86_64_GOTTPOFF; | |
666 | case R_X86_64_TLSLD: | |
667 | return R_X86_64_TPOFF32; | |
668 | } | |
669 | ||
670 | return r_type; | |
671 | } | |
672 | ||
70256ad8 | 673 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
674 | calculate needed space in the global offset table, procedure |
675 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 676 | |
b34976b6 | 677 | static bfd_boolean |
70256ad8 AJ |
678 | elf64_x86_64_check_relocs (abfd, info, sec, relocs) |
679 | bfd *abfd; | |
680 | struct bfd_link_info *info; | |
681 | asection *sec; | |
682 | const Elf_Internal_Rela *relocs; | |
683 | { | |
c434dee6 | 684 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
685 | Elf_Internal_Shdr *symtab_hdr; |
686 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
687 | const Elf_Internal_Rela *rel; |
688 | const Elf_Internal_Rela *rel_end; | |
70256ad8 AJ |
689 | asection *sreloc; |
690 | ||
691 | if (info->relocateable) | |
b34976b6 | 692 | return TRUE; |
70256ad8 | 693 | |
c434dee6 | 694 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
695 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
696 | sym_hashes = elf_sym_hashes (abfd); | |
70256ad8 | 697 | |
c434dee6 AJ |
698 | sreloc = NULL; |
699 | ||
70256ad8 AJ |
700 | rel_end = relocs + sec->reloc_count; |
701 | for (rel = relocs; rel < rel_end; rel++) | |
702 | { | |
bffbf940 | 703 | unsigned int r_type; |
70256ad8 AJ |
704 | unsigned long r_symndx; |
705 | struct elf_link_hash_entry *h; | |
706 | ||
707 | r_symndx = ELF64_R_SYM (rel->r_info); | |
bffbf940 | 708 | r_type = ELF64_R_TYPE (rel->r_info); |
c434dee6 AJ |
709 | |
710 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
711 | { | |
712 | (*_bfd_error_handler) (_("%s: bad symbol index: %d"), | |
713 | bfd_archive_filename (abfd), | |
714 | r_symndx); | |
b34976b6 | 715 | return FALSE; |
c434dee6 AJ |
716 | } |
717 | ||
70256ad8 AJ |
718 | if (r_symndx < symtab_hdr->sh_info) |
719 | h = NULL; | |
720 | else | |
721 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
722 | ||
bffbf940 JJ |
723 | r_type = elf64_x86_64_tls_transition (info, r_type, h == NULL); |
724 | switch (r_type) | |
70256ad8 | 725 | { |
bffbf940 JJ |
726 | case R_X86_64_TLSLD: |
727 | htab->tls_ld_got.refcount += 1; | |
728 | goto create_got; | |
729 | ||
730 | case R_X86_64_TPOFF32: | |
731 | if (info->shared) | |
70256ad8 | 732 | { |
bffbf940 JJ |
733 | (*_bfd_error_handler) |
734 | (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"), | |
735 | bfd_archive_filename (abfd), | |
736 | x86_64_elf_howto_table[r_type].name); | |
737 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 738 | return FALSE; |
70256ad8 | 739 | } |
bffbf940 | 740 | break; |
c434dee6 | 741 | |
bffbf940 JJ |
742 | case R_X86_64_GOTTPOFF: |
743 | if (info->shared) | |
744 | info->flags |= DF_STATIC_TLS; | |
745 | /* Fall through */ | |
70256ad8 | 746 | |
bffbf940 JJ |
747 | case R_X86_64_GOT32: |
748 | case R_X86_64_GOTPCREL: | |
749 | case R_X86_64_TLSGD: | |
750 | /* This symbol requires a global offset table entry. */ | |
751 | { | |
752 | int tls_type, old_tls_type; | |
753 | ||
754 | switch (r_type) | |
755 | { | |
756 | default: tls_type = GOT_NORMAL; break; | |
757 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
758 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
759 | } | |
760 | ||
761 | if (h != NULL) | |
762 | { | |
763 | h->got.refcount += 1; | |
764 | old_tls_type = elf64_x86_64_hash_entry (h)->tls_type; | |
765 | } | |
766 | else | |
767 | { | |
768 | bfd_signed_vma *local_got_refcounts; | |
769 | ||
770 | /* This is a global offset table entry for a local symbol. */ | |
771 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
772 | if (local_got_refcounts == NULL) | |
773 | { | |
774 | bfd_size_type size; | |
775 | ||
776 | size = symtab_hdr->sh_info; | |
777 | size *= sizeof (bfd_signed_vma) + sizeof (char); | |
778 | local_got_refcounts = ((bfd_signed_vma *) | |
779 | bfd_zalloc (abfd, size)); | |
780 | if (local_got_refcounts == NULL) | |
b34976b6 | 781 | return FALSE; |
bffbf940 JJ |
782 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
783 | elf64_x86_64_local_got_tls_type (abfd) | |
784 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); | |
785 | } | |
786 | local_got_refcounts[r_symndx] += 1; | |
787 | old_tls_type | |
788 | = elf64_x86_64_local_got_tls_type (abfd) [r_symndx]; | |
789 | } | |
790 | ||
791 | /* If a TLS symbol is accessed using IE at least once, | |
792 | there is no point to use dynamic model for it. */ | |
793 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
794 | && (old_tls_type != GOT_TLS_GD || tls_type != GOT_TLS_IE)) | |
795 | { | |
796 | if (old_tls_type == GOT_TLS_IE && tls_type == GOT_TLS_GD) | |
797 | tls_type = old_tls_type; | |
798 | else | |
799 | { | |
800 | (*_bfd_error_handler) | |
801 | (_("%s: %s' accessed both as normal and thread local symbol"), | |
802 | bfd_archive_filename (abfd), | |
803 | h ? h->root.root.string : "<local>"); | |
b34976b6 | 804 | return FALSE; |
bffbf940 JJ |
805 | } |
806 | } | |
807 | ||
808 | if (old_tls_type != tls_type) | |
809 | { | |
810 | if (h != NULL) | |
811 | elf64_x86_64_hash_entry (h)->tls_type = tls_type; | |
812 | else | |
813 | elf64_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
814 | } | |
815 | } | |
c434dee6 AJ |
816 | /* Fall through */ |
817 | ||
818 | //case R_X86_64_GOTPCREL: | |
bffbf940 | 819 | create_got: |
c434dee6 AJ |
820 | if (htab->sgot == NULL) |
821 | { | |
822 | if (htab->elf.dynobj == NULL) | |
823 | htab->elf.dynobj = abfd; | |
824 | if (!create_got_section (htab->elf.dynobj, info)) | |
b34976b6 | 825 | return FALSE; |
c434dee6 | 826 | } |
70256ad8 AJ |
827 | break; |
828 | ||
829 | case R_X86_64_PLT32: | |
830 | /* This symbol requires a procedure linkage table entry. We | |
407443a3 AJ |
831 | actually build the entry in adjust_dynamic_symbol, |
832 | because this might be a case of linking PIC code which is | |
833 | never referenced by a dynamic object, in which case we | |
834 | don't need to generate a procedure linkage table entry | |
835 | after all. */ | |
70256ad8 AJ |
836 | |
837 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 838 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
839 | if (h == NULL) |
840 | continue; | |
841 | ||
cc78d0af | 842 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
51b64d56 | 843 | h->plt.refcount += 1; |
70256ad8 AJ |
844 | break; |
845 | ||
cc78d0af AJ |
846 | case R_X86_64_8: |
847 | case R_X86_64_16: | |
70256ad8 AJ |
848 | case R_X86_64_32: |
849 | case R_X86_64_32S: | |
1b71fb54 AJ |
850 | /* Let's help debug shared library creation. These relocs |
851 | cannot be used in shared libs. Don't error out for | |
852 | sections we don't care about, such as debug sections or | |
853 | non-constant sections. */ | |
854 | if (info->shared | |
855 | && (sec->flags & SEC_ALLOC) != 0 | |
856 | && (sec->flags & SEC_READONLY) != 0) | |
857 | { | |
858 | (*_bfd_error_handler) | |
859 | (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"), | |
860 | bfd_archive_filename (abfd), | |
bffbf940 | 861 | x86_64_elf_howto_table[r_type].name); |
1b71fb54 | 862 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 863 | return FALSE; |
1b71fb54 AJ |
864 | } |
865 | /* Fall through. */ | |
866 | ||
c434dee6 AJ |
867 | case R_X86_64_PC8: |
868 | case R_X86_64_PC16: | |
70256ad8 | 869 | case R_X86_64_PC32: |
1b71fb54 | 870 | case R_X86_64_64: |
c434dee6 AJ |
871 | if (h != NULL && !info->shared) |
872 | { | |
873 | /* If this reloc is in a read-only section, we might | |
874 | need a copy reloc. We can't check reliably at this | |
875 | stage whether the section is read-only, as input | |
876 | sections have not yet been mapped to output sections. | |
877 | Tentatively set the flag for now, and correct in | |
878 | adjust_dynamic_symbol. */ | |
879 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
880 | ||
881 | /* We may need a .plt entry if the function this reloc | |
882 | refers to is in a shared lib. */ | |
883 | h->plt.refcount += 1; | |
884 | } | |
70256ad8 AJ |
885 | |
886 | /* If we are creating a shared library, and this is a reloc | |
887 | against a global symbol, or a non PC relative reloc | |
888 | against a local symbol, then we need to copy the reloc | |
889 | into the shared library. However, if we are linking with | |
890 | -Bsymbolic, we do not need to copy a reloc against a | |
891 | global symbol which is defined in an object we are | |
407443a3 | 892 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
893 | this point we have not seen all the input files, so it is |
894 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
895 | later (it is never cleared). In case of a weak definition, |
896 | DEF_REGULAR may be cleared later by a strong definition in | |
897 | a shared library. We account for that possibility below by | |
898 | storing information in the relocs_copied field of the hash | |
899 | table entry. A similar situation occurs when creating | |
900 | shared libraries and symbol visibility changes render the | |
901 | symbol local. | |
902 | ||
903 | If on the other hand, we are creating an executable, we | |
904 | may need to keep relocations for symbols satisfied by a | |
905 | dynamic library if we manage to avoid copy relocs for the | |
906 | symbol. */ | |
907 | if ((info->shared | |
908 | && (sec->flags & SEC_ALLOC) != 0 | |
bffbf940 JJ |
909 | && (((r_type != R_X86_64_PC8) |
910 | && (r_type != R_X86_64_PC16) | |
911 | && (r_type != R_X86_64_PC32)) | |
c434dee6 AJ |
912 | || (h != NULL |
913 | && (! info->symbolic | |
914 | || h->root.type == bfd_link_hash_defweak | |
915 | || (h->elf_link_hash_flags | |
916 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
917 | || (!info->shared | |
918 | && (sec->flags & SEC_ALLOC) != 0 | |
919 | && h != NULL | |
920 | && (h->root.type == bfd_link_hash_defweak | |
921 | || (h->elf_link_hash_flags | |
922 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
70256ad8 | 923 | { |
c434dee6 AJ |
924 | struct elf64_x86_64_dyn_relocs *p; |
925 | struct elf64_x86_64_dyn_relocs **head; | |
926 | ||
927 | /* We must copy these reloc types into the output file. | |
928 | Create a reloc section in dynobj and make room for | |
929 | this reloc. */ | |
70256ad8 AJ |
930 | if (sreloc == NULL) |
931 | { | |
932 | const char *name; | |
c434dee6 | 933 | bfd *dynobj; |
70256ad8 AJ |
934 | |
935 | name = (bfd_elf_string_from_elf_section | |
936 | (abfd, | |
937 | elf_elfheader (abfd)->e_shstrndx, | |
938 | elf_section_data (sec)->rel_hdr.sh_name)); | |
939 | if (name == NULL) | |
b34976b6 | 940 | return FALSE; |
70256ad8 | 941 | |
c434dee6 AJ |
942 | if (strncmp (name, ".rela", 5) != 0 |
943 | || strcmp (bfd_get_section_name (abfd, sec), | |
944 | name + 5) != 0) | |
945 | { | |
946 | (*_bfd_error_handler) | |
947 | (_("%s: bad relocation section name `%s\'"), | |
948 | bfd_archive_filename (abfd), name); | |
949 | } | |
950 | ||
951 | if (htab->elf.dynobj == NULL) | |
952 | htab->elf.dynobj = abfd; | |
953 | ||
954 | dynobj = htab->elf.dynobj; | |
70256ad8 AJ |
955 | |
956 | sreloc = bfd_get_section_by_name (dynobj, name); | |
957 | if (sreloc == NULL) | |
958 | { | |
959 | flagword flags; | |
960 | ||
961 | sreloc = bfd_make_section (dynobj, name); | |
962 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
963 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
964 | if ((sec->flags & SEC_ALLOC) != 0) | |
965 | flags |= SEC_ALLOC | SEC_LOAD; | |
966 | if (sreloc == NULL | |
967 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
cc78d0af | 968 | || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
b34976b6 | 969 | return FALSE; |
70256ad8 | 970 | } |
c434dee6 | 971 | elf_section_data (sec)->sreloc = sreloc; |
70256ad8 AJ |
972 | } |
973 | ||
c434dee6 AJ |
974 | /* If this is a global symbol, we count the number of |
975 | relocations we need for this symbol. */ | |
976 | if (h != NULL) | |
70256ad8 | 977 | { |
c434dee6 AJ |
978 | head = &((struct elf64_x86_64_link_hash_entry *) h)->dyn_relocs; |
979 | } | |
980 | else | |
981 | { | |
982 | /* Track dynamic relocs needed for local syms too. | |
983 | We really need local syms available to do this | |
984 | easily. Oh well. */ | |
985 | ||
986 | asection *s; | |
987 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
988 | sec, r_symndx); | |
989 | if (s == NULL) | |
b34976b6 | 990 | return FALSE; |
70256ad8 | 991 | |
c434dee6 AJ |
992 | head = ((struct elf64_x86_64_dyn_relocs **) |
993 | &elf_section_data (s)->local_dynrel); | |
994 | } | |
70256ad8 | 995 | |
c434dee6 AJ |
996 | p = *head; |
997 | if (p == NULL || p->sec != sec) | |
998 | { | |
999 | bfd_size_type amt = sizeof *p; | |
1000 | p = ((struct elf64_x86_64_dyn_relocs *) | |
1001 | bfd_alloc (htab->elf.dynobj, amt)); | |
70256ad8 | 1002 | if (p == NULL) |
b34976b6 | 1003 | return FALSE; |
c434dee6 AJ |
1004 | p->next = *head; |
1005 | *head = p; | |
1006 | p->sec = sec; | |
1007 | p->count = 0; | |
1008 | p->pc_count = 0; | |
70256ad8 | 1009 | } |
c434dee6 AJ |
1010 | |
1011 | p->count += 1; | |
bffbf940 JJ |
1012 | if (r_type == R_X86_64_PC8 |
1013 | || r_type == R_X86_64_PC16 | |
1014 | || r_type == R_X86_64_PC32) | |
c434dee6 | 1015 | p->pc_count += 1; |
70256ad8 AJ |
1016 | } |
1017 | break; | |
fe4770f4 AJ |
1018 | |
1019 | /* This relocation describes the C++ object vtable hierarchy. | |
1020 | Reconstruct it for later use during GC. */ | |
1021 | case R_X86_64_GNU_VTINHERIT: | |
1022 | if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
b34976b6 | 1023 | return FALSE; |
fe4770f4 AJ |
1024 | break; |
1025 | ||
1026 | /* This relocation describes which C++ vtable entries are actually | |
1027 | used. Record for later use during GC. */ | |
1028 | case R_X86_64_GNU_VTENTRY: | |
cc78d0af | 1029 | if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
b34976b6 | 1030 | return FALSE; |
fe4770f4 | 1031 | break; |
c434dee6 AJ |
1032 | |
1033 | default: | |
1034 | break; | |
70256ad8 AJ |
1035 | } |
1036 | } | |
1037 | ||
b34976b6 | 1038 | return TRUE; |
70256ad8 AJ |
1039 | } |
1040 | ||
1041 | /* Return the section that should be marked against GC for a given | |
407443a3 | 1042 | relocation. */ |
70256ad8 AJ |
1043 | |
1044 | static asection * | |
1e2f5b6e AM |
1045 | elf64_x86_64_gc_mark_hook (sec, info, rel, h, sym) |
1046 | asection *sec; | |
70256ad8 | 1047 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
c434dee6 | 1048 | Elf_Internal_Rela *rel; |
70256ad8 AJ |
1049 | struct elf_link_hash_entry *h; |
1050 | Elf_Internal_Sym *sym; | |
1051 | { | |
1052 | if (h != NULL) | |
1053 | { | |
fe4770f4 | 1054 | switch (ELF64_R_TYPE (rel->r_info)) |
70256ad8 | 1055 | { |
fe4770f4 AJ |
1056 | case R_X86_64_GNU_VTINHERIT: |
1057 | case R_X86_64_GNU_VTENTRY: | |
1058 | break; | |
70256ad8 AJ |
1059 | |
1060 | default: | |
fe4770f4 AJ |
1061 | switch (h->root.type) |
1062 | { | |
1063 | case bfd_link_hash_defined: | |
1064 | case bfd_link_hash_defweak: | |
1065 | return h->root.u.def.section; | |
1066 | ||
1067 | case bfd_link_hash_common: | |
1068 | return h->root.u.c.p->section; | |
1069 | ||
1070 | default: | |
1071 | break; | |
1072 | } | |
70256ad8 AJ |
1073 | } |
1074 | } | |
1075 | else | |
1e2f5b6e | 1076 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
70256ad8 AJ |
1077 | |
1078 | return NULL; | |
1079 | } | |
1080 | ||
407443a3 | 1081 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 | 1082 | |
b34976b6 | 1083 | static bfd_boolean |
70256ad8 AJ |
1084 | elf64_x86_64_gc_sweep_hook (abfd, info, sec, relocs) |
1085 | bfd *abfd; | |
c434dee6 | 1086 | struct bfd_link_info *info; |
70256ad8 AJ |
1087 | asection *sec; |
1088 | const Elf_Internal_Rela *relocs; | |
1089 | { | |
1090 | Elf_Internal_Shdr *symtab_hdr; | |
1091 | struct elf_link_hash_entry **sym_hashes; | |
1092 | bfd_signed_vma *local_got_refcounts; | |
1093 | const Elf_Internal_Rela *rel, *relend; | |
c434dee6 AJ |
1094 | |
1095 | elf_section_data (sec)->local_dynrel = NULL; | |
70256ad8 AJ |
1096 | |
1097 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1098 | sym_hashes = elf_sym_hashes (abfd); | |
1099 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1100 | ||
70256ad8 AJ |
1101 | relend = relocs + sec->reloc_count; |
1102 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
1103 | { |
1104 | unsigned long r_symndx; | |
1105 | unsigned int r_type; | |
1106 | struct elf_link_hash_entry *h = NULL; | |
70256ad8 | 1107 | |
26e41594 AM |
1108 | r_symndx = ELF64_R_SYM (rel->r_info); |
1109 | if (r_symndx >= symtab_hdr->sh_info) | |
1110 | { | |
1111 | struct elf64_x86_64_link_hash_entry *eh; | |
1112 | struct elf64_x86_64_dyn_relocs **pp; | |
1113 | struct elf64_x86_64_dyn_relocs *p; | |
c434dee6 | 1114 | |
26e41594 AM |
1115 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1116 | eh = (struct elf64_x86_64_link_hash_entry *) h; | |
c434dee6 | 1117 | |
26e41594 AM |
1118 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1119 | if (p->sec == sec) | |
1120 | { | |
1121 | /* Everything must go for SEC. */ | |
1122 | *pp = p->next; | |
1123 | break; | |
1124 | } | |
1125 | } | |
c434dee6 | 1126 | |
26e41594 AM |
1127 | r_type = ELF64_R_TYPE (rel->r_info); |
1128 | r_type = elf64_x86_64_tls_transition (info, r_type, h != NULL); | |
1129 | switch (r_type) | |
1130 | { | |
1131 | case R_X86_64_TLSLD: | |
1132 | if (elf64_x86_64_hash_table (info)->tls_ld_got.refcount > 0) | |
1133 | elf64_x86_64_hash_table (info)->tls_ld_got.refcount -= 1; | |
1134 | break; | |
c434dee6 | 1135 | |
26e41594 AM |
1136 | case R_X86_64_TLSGD: |
1137 | case R_X86_64_GOTTPOFF: | |
1138 | case R_X86_64_GOT32: | |
1139 | case R_X86_64_GOTPCREL: | |
1140 | if (h != NULL) | |
1141 | { | |
1142 | if (h->got.refcount > 0) | |
1143 | h->got.refcount -= 1; | |
1144 | } | |
1145 | else if (local_got_refcounts != NULL) | |
1146 | { | |
1147 | if (local_got_refcounts[r_symndx] > 0) | |
1148 | local_got_refcounts[r_symndx] -= 1; | |
1149 | } | |
1150 | break; | |
c434dee6 | 1151 | |
26e41594 AM |
1152 | case R_X86_64_8: |
1153 | case R_X86_64_16: | |
1154 | case R_X86_64_32: | |
1155 | case R_X86_64_64: | |
1156 | case R_X86_64_32S: | |
1157 | case R_X86_64_PC8: | |
1158 | case R_X86_64_PC16: | |
1159 | case R_X86_64_PC32: | |
1160 | if (info->shared) | |
1161 | break; | |
1162 | /* Fall thru */ | |
c434dee6 | 1163 | |
26e41594 AM |
1164 | case R_X86_64_PLT32: |
1165 | if (h != NULL) | |
1166 | { | |
1167 | if (h->plt.refcount > 0) | |
1168 | h->plt.refcount -= 1; | |
1169 | } | |
1170 | break; | |
70256ad8 | 1171 | |
26e41594 AM |
1172 | default: |
1173 | break; | |
1174 | } | |
1175 | } | |
70256ad8 | 1176 | |
b34976b6 | 1177 | return TRUE; |
70256ad8 AJ |
1178 | } |
1179 | ||
1180 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1181 | regular object. The current definition is in some section of the | |
1182 | dynamic object, but we're not including those sections. We have to | |
1183 | change the definition to something the rest of the link can | |
407443a3 | 1184 | understand. */ |
70256ad8 | 1185 | |
b34976b6 | 1186 | static bfd_boolean |
70256ad8 AJ |
1187 | elf64_x86_64_adjust_dynamic_symbol (info, h) |
1188 | struct bfd_link_info *info; | |
1189 | struct elf_link_hash_entry *h; | |
1190 | { | |
c434dee6 AJ |
1191 | struct elf64_x86_64_link_hash_table *htab; |
1192 | struct elf64_x86_64_link_hash_entry * eh; | |
1193 | struct elf64_x86_64_dyn_relocs *p; | |
70256ad8 AJ |
1194 | asection *s; |
1195 | unsigned int power_of_two; | |
1196 | ||
70256ad8 AJ |
1197 | /* If this is a function, put it in the procedure linkage table. We |
1198 | will fill in the contents of the procedure linkage table later, | |
1199 | when we know the address of the .got section. */ | |
1200 | if (h->type == STT_FUNC | |
1201 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
1202 | { | |
c434dee6 AJ |
1203 | if (h->plt.refcount <= 0 |
1204 | || (! info->shared | |
1205 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
1206 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 | |
1207 | && h->root.type != bfd_link_hash_undefweak | |
1208 | && h->root.type != bfd_link_hash_undefined)) | |
70256ad8 | 1209 | { |
70256ad8 AJ |
1210 | /* This case can occur if we saw a PLT32 reloc in an input |
1211 | file, but the symbol was never referred to by a dynamic | |
1212 | object, or if all references were garbage collected. In | |
1213 | such a case, we don't actually need to build a procedure | |
1214 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 AJ |
1215 | h->plt.offset = (bfd_vma) -1; |
1216 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
70256ad8 AJ |
1217 | } |
1218 | ||
b34976b6 | 1219 | return TRUE; |
70256ad8 | 1220 | } |
bbd7ec4a | 1221 | else |
c434dee6 AJ |
1222 | /* It's possible that we incorrectly decided a .plt reloc was |
1223 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
1224 | check_relocs. We can't decide accurately between function and | |
1225 | non-function syms in check-relocs; Objects loaded later in | |
1226 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1227 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
1228 | |
1229 | /* If this is a weak symbol, and there is a real definition, the | |
1230 | processor independent code will have arranged for us to see the | |
407443a3 | 1231 | real definition first, and we can just use the same value. */ |
70256ad8 AJ |
1232 | if (h->weakdef != NULL) |
1233 | { | |
1234 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
1235 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
1236 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
1237 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
b34976b6 | 1238 | return TRUE; |
70256ad8 AJ |
1239 | } |
1240 | ||
1241 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 1242 | is not a function. */ |
70256ad8 AJ |
1243 | |
1244 | /* If we are creating a shared library, we must presume that the | |
1245 | only references to the symbol are via the global offset table. | |
1246 | For such cases we need not do anything here; the relocations will | |
407443a3 | 1247 | be handled correctly by relocate_section. */ |
70256ad8 | 1248 | if (info->shared) |
b34976b6 | 1249 | return TRUE; |
70256ad8 AJ |
1250 | |
1251 | /* If there are no references to this symbol that do not use the | |
1252 | GOT, we don't need to generate a copy reloc. */ | |
1253 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) | |
b34976b6 | 1254 | return TRUE; |
70256ad8 | 1255 | |
c434dee6 AJ |
1256 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1257 | if (info->nocopyreloc) | |
1258 | { | |
1259 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
b34976b6 | 1260 | return TRUE; |
c434dee6 AJ |
1261 | } |
1262 | ||
1263 | eh = (struct elf64_x86_64_link_hash_entry *) h; | |
1264 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1265 | { | |
1266 | s = p->sec->output_section; | |
1267 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1268 | break; | |
1269 | } | |
1270 | ||
1271 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1272 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1273 | if (p == NULL) | |
1274 | { | |
1275 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
b34976b6 | 1276 | return TRUE; |
c434dee6 AJ |
1277 | } |
1278 | ||
70256ad8 | 1279 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 1280 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
1281 | an entry for this symbol in the .dynsym section. The dynamic |
1282 | object will contain position independent code, so all references | |
1283 | from the dynamic object to this symbol will go through the global | |
1284 | offset table. The dynamic linker will use the .dynsym entry to | |
1285 | determine the address it must put in the global offset table, so | |
1286 | both the dynamic object and the regular object will refer to the | |
1287 | same memory location for the variable. */ | |
1288 | ||
c434dee6 | 1289 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
1290 | |
1291 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
1292 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 1293 | runtime process image. */ |
70256ad8 AJ |
1294 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1295 | { | |
c434dee6 | 1296 | htab->srelbss->_raw_size += sizeof (Elf64_External_Rela); |
70256ad8 AJ |
1297 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
1298 | } | |
1299 | ||
1300 | /* We need to figure out the alignment required for this symbol. I | |
407443a3 | 1301 | have no idea how ELF linkers handle this. 16-bytes is the size |
70256ad8 AJ |
1302 | of the largest type that requires hard alignment -- long double. */ |
1303 | /* FIXME: This is VERY ugly. Should be fixed for all architectures using | |
1304 | this construct. */ | |
1305 | power_of_two = bfd_log2 (h->size); | |
1306 | if (power_of_two > 4) | |
1307 | power_of_two = 4; | |
1308 | ||
1309 | /* Apply the required alignment. */ | |
c434dee6 | 1310 | s = htab->sdynbss; |
70256ad8 | 1311 | s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); |
c434dee6 | 1312 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) |
70256ad8 | 1313 | { |
c434dee6 | 1314 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
b34976b6 | 1315 | return FALSE; |
70256ad8 AJ |
1316 | } |
1317 | ||
1318 | /* Define the symbol as being at this point in the section. */ | |
1319 | h->root.u.def.section = s; | |
1320 | h->root.u.def.value = s->_raw_size; | |
1321 | ||
1322 | /* Increment the section size to make room for the symbol. */ | |
1323 | s->_raw_size += h->size; | |
1324 | ||
b34976b6 | 1325 | return TRUE; |
70256ad8 AJ |
1326 | } |
1327 | ||
c434dee6 AJ |
1328 | /* This is the condition under which elf64_x86_64_finish_dynamic_symbol |
1329 | will be called from elflink.h. If elflink.h doesn't call our | |
1330 | finish_dynamic_symbol routine, we'll need to do something about | |
1331 | initializing any .plt and .got entries in elf64_x86_64_relocate_section. */ | |
1332 | #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ | |
1333 | ((DYN) \ | |
1334 | && ((INFO)->shared \ | |
1335 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ | |
1336 | && ((H)->dynindx != -1 \ | |
1337 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) | |
1338 | ||
1339 | /* Allocate space in .plt, .got and associated reloc sections for | |
1340 | dynamic relocs. */ | |
1341 | ||
b34976b6 | 1342 | static bfd_boolean |
c434dee6 AJ |
1343 | allocate_dynrelocs (h, inf) |
1344 | struct elf_link_hash_entry *h; | |
1345 | PTR inf; | |
1346 | { | |
1347 | struct bfd_link_info *info; | |
1348 | struct elf64_x86_64_link_hash_table *htab; | |
1349 | struct elf64_x86_64_link_hash_entry *eh; | |
1350 | struct elf64_x86_64_dyn_relocs *p; | |
1351 | ||
e92d460e | 1352 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1353 | return TRUE; |
c434dee6 | 1354 | |
e92d460e AM |
1355 | if (h->root.type == bfd_link_hash_warning) |
1356 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1357 | ||
c434dee6 AJ |
1358 | info = (struct bfd_link_info *) inf; |
1359 | htab = elf64_x86_64_hash_table (info); | |
1360 | ||
1361 | if (htab->elf.dynamic_sections_created | |
1362 | && h->plt.refcount > 0) | |
1363 | { | |
1364 | /* Make sure this symbol is output as a dynamic symbol. | |
1365 | Undefined weak syms won't yet be marked as dynamic. */ | |
1366 | if (h->dynindx == -1 | |
1367 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1368 | { | |
1369 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 1370 | return FALSE; |
c434dee6 AJ |
1371 | } |
1372 | ||
1373 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h)) | |
1374 | { | |
1375 | asection *s = htab->splt; | |
1376 | ||
1377 | /* If this is the first .plt entry, make room for the special | |
1378 | first entry. */ | |
1379 | if (s->_raw_size == 0) | |
1380 | s->_raw_size += PLT_ENTRY_SIZE; | |
1381 | ||
1382 | h->plt.offset = s->_raw_size; | |
1383 | ||
1384 | /* If this symbol is not defined in a regular file, and we are | |
1385 | not generating a shared library, then set the symbol to this | |
1386 | location in the .plt. This is required to make function | |
1387 | pointers compare as equal between the normal executable and | |
1388 | the shared library. */ | |
1389 | if (! info->shared | |
1390 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1391 | { | |
1392 | h->root.u.def.section = s; | |
1393 | h->root.u.def.value = h->plt.offset; | |
1394 | } | |
1395 | ||
1396 | /* Make room for this entry. */ | |
1397 | s->_raw_size += PLT_ENTRY_SIZE; | |
1398 | ||
1399 | /* We also need to make an entry in the .got.plt section, which | |
1400 | will be placed in the .got section by the linker script. */ | |
1401 | htab->sgotplt->_raw_size += GOT_ENTRY_SIZE; | |
1402 | ||
1403 | /* We also need to make an entry in the .rela.plt section. */ | |
1404 | htab->srelplt->_raw_size += sizeof (Elf64_External_Rela); | |
1405 | } | |
1406 | else | |
1407 | { | |
1408 | h->plt.offset = (bfd_vma) -1; | |
1409 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
1410 | } | |
1411 | } | |
1412 | else | |
1413 | { | |
1414 | h->plt.offset = (bfd_vma) -1; | |
1415 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
1416 | } | |
1417 | ||
bffbf940 JJ |
1418 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
1419 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
1420 | if (h->got.refcount > 0 | |
1421 | && !info->shared | |
1422 | && h->dynindx == -1 | |
1423 | && elf64_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) | |
1424 | h->got.offset = (bfd_vma) -1; | |
1425 | else if (h->got.refcount > 0) | |
c434dee6 AJ |
1426 | { |
1427 | asection *s; | |
b34976b6 | 1428 | bfd_boolean dyn; |
bffbf940 | 1429 | int tls_type = elf64_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
1430 | |
1431 | /* Make sure this symbol is output as a dynamic symbol. | |
1432 | Undefined weak syms won't yet be marked as dynamic. */ | |
1433 | if (h->dynindx == -1 | |
1434 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1435 | { | |
1436 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 1437 | return FALSE; |
c434dee6 AJ |
1438 | } |
1439 | ||
1440 | s = htab->sgot; | |
1441 | h->got.offset = s->_raw_size; | |
1442 | s->_raw_size += GOT_ENTRY_SIZE; | |
bffbf940 JJ |
1443 | /* R_X86_64_TLSGD needs 2 consecutive GOT slots. */ |
1444 | if (tls_type == GOT_TLS_GD) | |
1445 | s->_raw_size += GOT_ENTRY_SIZE; | |
c434dee6 | 1446 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 JJ |
1447 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
1448 | and two if global. | |
1449 | R_X86_64_GOTTPOFF needs one dynamic relocation. */ | |
1450 | if ((tls_type == GOT_TLS_GD && h->dynindx == -1) | |
1451 | || tls_type == GOT_TLS_IE) | |
1452 | htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); | |
1453 | else if (tls_type == GOT_TLS_GD) | |
1454 | htab->srelgot->_raw_size += 2 * sizeof (Elf64_External_Rela); | |
1455 | else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) | |
c434dee6 AJ |
1456 | htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); |
1457 | } | |
1458 | else | |
1459 | h->got.offset = (bfd_vma) -1; | |
1460 | ||
1461 | eh = (struct elf64_x86_64_link_hash_entry *) h; | |
1462 | if (eh->dyn_relocs == NULL) | |
b34976b6 | 1463 | return TRUE; |
c434dee6 AJ |
1464 | |
1465 | /* In the shared -Bsymbolic case, discard space allocated for | |
1466 | dynamic pc-relative relocs against symbols which turn out to be | |
1467 | defined in regular objects. For the normal shared case, discard | |
1468 | space for pc-relative relocs that have become local due to symbol | |
1469 | visibility changes. */ | |
1470 | ||
1471 | if (info->shared) | |
1472 | { | |
1473 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
1474 | && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 | |
1475 | || info->symbolic)) | |
1476 | { | |
1477 | struct elf64_x86_64_dyn_relocs **pp; | |
1478 | ||
1479 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1480 | { | |
1481 | p->count -= p->pc_count; | |
1482 | p->pc_count = 0; | |
1483 | if (p->count == 0) | |
1484 | *pp = p->next; | |
1485 | else | |
1486 | pp = &p->next; | |
1487 | } | |
1488 | } | |
1489 | } | |
1490 | else | |
1491 | { | |
1492 | /* For the non-shared case, discard space for relocs against | |
1493 | symbols which turn out to need copy relocs or are not | |
1494 | dynamic. */ | |
1495 | ||
1496 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
1497 | && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1498 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1499 | || (htab->elf.dynamic_sections_created | |
1500 | && (h->root.type == bfd_link_hash_undefweak | |
1501 | || h->root.type == bfd_link_hash_undefined)))) | |
1502 | { | |
1503 | /* Make sure this symbol is output as a dynamic symbol. | |
1504 | Undefined weak syms won't yet be marked as dynamic. */ | |
1505 | if (h->dynindx == -1 | |
1506 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1507 | { | |
1508 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 1509 | return FALSE; |
c434dee6 AJ |
1510 | } |
1511 | ||
1512 | /* If that succeeded, we know we'll be keeping all the | |
1513 | relocs. */ | |
1514 | if (h->dynindx != -1) | |
1515 | goto keep; | |
1516 | } | |
1517 | ||
1518 | eh->dyn_relocs = NULL; | |
1519 | ||
1520 | keep: ; | |
1521 | } | |
1522 | ||
1523 | /* Finally, allocate space. */ | |
1524 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1525 | { | |
1526 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
1527 | sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela); | |
1528 | } | |
1529 | ||
b34976b6 | 1530 | return TRUE; |
c434dee6 AJ |
1531 | } |
1532 | ||
1533 | /* Find any dynamic relocs that apply to read-only sections. */ | |
1534 | ||
b34976b6 | 1535 | static bfd_boolean |
c434dee6 AJ |
1536 | readonly_dynrelocs (h, inf) |
1537 | struct elf_link_hash_entry *h; | |
1538 | PTR inf; | |
1539 | { | |
1540 | struct elf64_x86_64_link_hash_entry *eh; | |
1541 | struct elf64_x86_64_dyn_relocs *p; | |
1542 | ||
e92d460e AM |
1543 | if (h->root.type == bfd_link_hash_warning) |
1544 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1545 | ||
c434dee6 AJ |
1546 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
1547 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1548 | { | |
1549 | asection *s = p->sec->output_section; | |
1550 | ||
1551 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1552 | { | |
1553 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1554 | ||
1555 | info->flags |= DF_TEXTREL; | |
1556 | ||
1557 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 1558 | return FALSE; |
c434dee6 AJ |
1559 | } |
1560 | } | |
b34976b6 | 1561 | return TRUE; |
c434dee6 AJ |
1562 | } |
1563 | ||
70256ad8 AJ |
1564 | /* Set the sizes of the dynamic sections. */ |
1565 | ||
b34976b6 | 1566 | static bfd_boolean |
70256ad8 | 1567 | elf64_x86_64_size_dynamic_sections (output_bfd, info) |
8df9fc9d | 1568 | bfd *output_bfd ATTRIBUTE_UNUSED; |
70256ad8 AJ |
1569 | struct bfd_link_info *info; |
1570 | { | |
c434dee6 | 1571 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1572 | bfd *dynobj; |
1573 | asection *s; | |
b34976b6 | 1574 | bfd_boolean relocs; |
c434dee6 | 1575 | bfd *ibfd; |
70256ad8 | 1576 | |
c434dee6 AJ |
1577 | htab = elf64_x86_64_hash_table (info); |
1578 | dynobj = htab->elf.dynobj; | |
1579 | if (dynobj == NULL) | |
1580 | abort (); | |
70256ad8 | 1581 | |
c434dee6 | 1582 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
1583 | { |
1584 | /* Set the contents of the .interp section to the interpreter. */ | |
1585 | if (! info->shared) | |
1586 | { | |
1587 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
c434dee6 AJ |
1588 | if (s == NULL) |
1589 | abort (); | |
70256ad8 AJ |
1590 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
1591 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1592 | } | |
1593 | } | |
70256ad8 | 1594 | |
c434dee6 AJ |
1595 | /* Set up .got offsets for local syms, and space for local dynamic |
1596 | relocs. */ | |
1597 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
70256ad8 | 1598 | { |
c434dee6 AJ |
1599 | bfd_signed_vma *local_got; |
1600 | bfd_signed_vma *end_local_got; | |
bffbf940 | 1601 | char *local_tls_type; |
c434dee6 AJ |
1602 | bfd_size_type locsymcount; |
1603 | Elf_Internal_Shdr *symtab_hdr; | |
1604 | asection *srel; | |
70256ad8 | 1605 | |
c434dee6 | 1606 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
70256ad8 AJ |
1607 | continue; |
1608 | ||
c434dee6 | 1609 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 1610 | { |
c434dee6 AJ |
1611 | struct elf64_x86_64_dyn_relocs *p; |
1612 | ||
1613 | for (p = *((struct elf64_x86_64_dyn_relocs **) | |
1614 | &elf_section_data (s)->local_dynrel); | |
1615 | p != NULL; | |
1616 | p = p->next) | |
70256ad8 | 1617 | { |
c434dee6 AJ |
1618 | if (!bfd_is_abs_section (p->sec) |
1619 | && bfd_is_abs_section (p->sec->output_section)) | |
1620 | { | |
1621 | /* Input section has been discarded, either because | |
1622 | it is a copy of a linkonce section or due to | |
1623 | linker script /DISCARD/, so we'll be discarding | |
1624 | the relocs too. */ | |
1625 | } | |
1626 | else if (p->count != 0) | |
1627 | { | |
1628 | srel = elf_section_data (p->sec)->sreloc; | |
1629 | srel->_raw_size += p->count * sizeof (Elf64_External_Rela); | |
1630 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) | |
1631 | info->flags |= DF_TEXTREL; | |
1632 | ||
1633 | } | |
70256ad8 AJ |
1634 | } |
1635 | } | |
c434dee6 AJ |
1636 | |
1637 | local_got = elf_local_got_refcounts (ibfd); | |
1638 | if (!local_got) | |
1639 | continue; | |
1640 | ||
1641 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
1642 | locsymcount = symtab_hdr->sh_info; | |
1643 | end_local_got = local_got + locsymcount; | |
bffbf940 | 1644 | local_tls_type = elf64_x86_64_local_got_tls_type (ibfd); |
c434dee6 AJ |
1645 | s = htab->sgot; |
1646 | srel = htab->srelgot; | |
bffbf940 | 1647 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
70256ad8 | 1648 | { |
c434dee6 | 1649 | if (*local_got > 0) |
70256ad8 | 1650 | { |
c434dee6 AJ |
1651 | *local_got = s->_raw_size; |
1652 | s->_raw_size += GOT_ENTRY_SIZE; | |
bffbf940 JJ |
1653 | if (*local_tls_type == GOT_TLS_GD) |
1654 | s->_raw_size += GOT_ENTRY_SIZE; | |
1655 | if (info->shared | |
1656 | || *local_tls_type == GOT_TLS_GD | |
1657 | || *local_tls_type == GOT_TLS_IE) | |
c434dee6 | 1658 | srel->_raw_size += sizeof (Elf64_External_Rela); |
70256ad8 AJ |
1659 | } |
1660 | else | |
c434dee6 AJ |
1661 | *local_got = (bfd_vma) -1; |
1662 | } | |
1663 | } | |
70256ad8 | 1664 | |
bffbf940 JJ |
1665 | if (htab->tls_ld_got.refcount > 0) |
1666 | { | |
1667 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
1668 | relocs. */ | |
1669 | htab->tls_ld_got.offset = htab->sgot->_raw_size; | |
1670 | htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE; | |
1671 | htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); | |
1672 | } | |
1673 | else | |
1674 | htab->tls_ld_got.offset = -1; | |
1675 | ||
c434dee6 AJ |
1676 | /* Allocate global sym .plt and .got entries, and space for global |
1677 | sym dynamic relocs. */ | |
1678 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); | |
1679 | ||
1680 | /* We now have determined the sizes of the various dynamic sections. | |
1681 | Allocate memory for them. */ | |
b34976b6 | 1682 | relocs = FALSE; |
c434dee6 AJ |
1683 | for (s = dynobj->sections; s != NULL; s = s->next) |
1684 | { | |
1685 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1686 | continue; | |
1687 | ||
1688 | if (s == htab->splt | |
1689 | || s == htab->sgot | |
1690 | || s == htab->sgotplt) | |
1691 | { | |
1692 | /* Strip this section if we don't need it; see the | |
1693 | comment below. */ | |
1694 | } | |
1695 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) | |
1696 | { | |
1697 | if (s->_raw_size != 0 && s != htab->srelplt) | |
b34976b6 | 1698 | relocs = TRUE; |
c434dee6 AJ |
1699 | |
1700 | /* We use the reloc_count field as a counter if we need | |
1701 | to copy relocs into the output file. */ | |
1702 | s->reloc_count = 0; | |
70256ad8 | 1703 | } |
c434dee6 | 1704 | else |
70256ad8 AJ |
1705 | { |
1706 | /* It's not one of our sections, so don't allocate space. */ | |
1707 | continue; | |
1708 | } | |
1709 | ||
c434dee6 | 1710 | if (s->_raw_size == 0) |
70256ad8 | 1711 | { |
c434dee6 AJ |
1712 | /* If we don't need this section, strip it from the |
1713 | output file. This is mostly to handle .rela.bss and | |
1714 | .rela.plt. We must create both sections in | |
1715 | create_dynamic_sections, because they must be created | |
1716 | before the linker maps input sections to output | |
1717 | sections. The linker does that before | |
1718 | adjust_dynamic_symbol is called, and it is that | |
1719 | function which decides whether anything needs to go | |
1720 | into these sections. */ | |
1721 | ||
70256ad8 AJ |
1722 | _bfd_strip_section_from_output (info, s); |
1723 | continue; | |
1724 | } | |
1725 | ||
1726 | /* Allocate memory for the section contents. We use bfd_zalloc | |
1727 | here in case unused entries are not reclaimed before the | |
1728 | section's contents are written out. This should not happen, | |
1729 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
1730 | of garbage. */ | |
1731 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
c434dee6 | 1732 | if (s->contents == NULL) |
b34976b6 | 1733 | return FALSE; |
70256ad8 AJ |
1734 | } |
1735 | ||
c434dee6 | 1736 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
1737 | { |
1738 | /* Add some entries to the .dynamic section. We fill in the | |
1739 | values later, in elf64_x86_64_finish_dynamic_sections, but we | |
1740 | must add the entries now so that we get the correct size for | |
407443a3 | 1741 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 1742 | dynamic linker and used by the debugger. */ |
dc810e39 AM |
1743 | #define add_dynamic_entry(TAG, VAL) \ |
1744 | bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
1745 | ||
70256ad8 AJ |
1746 | if (! info->shared) |
1747 | { | |
dc810e39 | 1748 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 1749 | return FALSE; |
70256ad8 AJ |
1750 | } |
1751 | ||
c434dee6 | 1752 | if (htab->splt->_raw_size != 0) |
70256ad8 | 1753 | { |
dc810e39 AM |
1754 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
1755 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
1756 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
1757 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 1758 | return FALSE; |
70256ad8 AJ |
1759 | } |
1760 | ||
1761 | if (relocs) | |
1762 | { | |
dc810e39 AM |
1763 | if (!add_dynamic_entry (DT_RELA, 0) |
1764 | || !add_dynamic_entry (DT_RELASZ, 0) | |
1765 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
b34976b6 | 1766 | return FALSE; |
70256ad8 | 1767 | |
c434dee6 AJ |
1768 | /* If any dynamic relocs apply to a read-only section, |
1769 | then we need a DT_TEXTREL entry. */ | |
1770 | if ((info->flags & DF_TEXTREL) == 0) | |
1771 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
1772 | (PTR) info); | |
1773 | ||
1774 | if ((info->flags & DF_TEXTREL) != 0) | |
1775 | { | |
1776 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 1777 | return FALSE; |
c434dee6 | 1778 | } |
70256ad8 AJ |
1779 | } |
1780 | } | |
dc810e39 | 1781 | #undef add_dynamic_entry |
70256ad8 | 1782 | |
b34976b6 | 1783 | return TRUE; |
70256ad8 AJ |
1784 | } |
1785 | ||
bffbf940 JJ |
1786 | /* Return the base VMA address which should be subtracted from real addresses |
1787 | when resolving @dtpoff relocation. | |
1788 | This is PT_TLS segment p_vaddr. */ | |
1789 | ||
1790 | static bfd_vma | |
1791 | dtpoff_base (info) | |
1792 | struct bfd_link_info *info; | |
1793 | { | |
1794 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
1795 | if (elf_hash_table (info)->tls_segment == NULL) | |
1796 | return 0; | |
1797 | return elf_hash_table (info)->tls_segment->start; | |
1798 | } | |
1799 | ||
1800 | /* Return the relocation value for @tpoff relocation | |
1801 | if STT_TLS virtual address is ADDRESS. */ | |
1802 | ||
1803 | static bfd_vma | |
1804 | tpoff (info, address) | |
1805 | struct bfd_link_info *info; | |
1806 | bfd_vma address; | |
1807 | { | |
1808 | struct elf_link_tls_segment *tls_segment | |
1809 | = elf_hash_table (info)->tls_segment; | |
1810 | ||
1811 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
1812 | if (tls_segment == NULL) | |
1813 | return 0; | |
1814 | return address - align_power (tls_segment->size, tls_segment->align) | |
1815 | - tls_segment->start; | |
1816 | } | |
1817 | ||
8d88c4ca NC |
1818 | /* Relocate an x86_64 ELF section. */ |
1819 | ||
b34976b6 | 1820 | static bfd_boolean |
8d88c4ca | 1821 | elf64_x86_64_relocate_section (output_bfd, info, input_bfd, input_section, |
fe4770f4 | 1822 | contents, relocs, local_syms, local_sections) |
8d88c4ca NC |
1823 | bfd *output_bfd; |
1824 | struct bfd_link_info *info; | |
1825 | bfd *input_bfd; | |
1826 | asection *input_section; | |
1827 | bfd_byte *contents; | |
1828 | Elf_Internal_Rela *relocs; | |
1829 | Elf_Internal_Sym *local_syms; | |
1830 | asection **local_sections; | |
1831 | { | |
c434dee6 | 1832 | struct elf64_x86_64_link_hash_table *htab; |
8d88c4ca NC |
1833 | Elf_Internal_Shdr *symtab_hdr; |
1834 | struct elf_link_hash_entry **sym_hashes; | |
1835 | bfd_vma *local_got_offsets; | |
c434dee6 | 1836 | Elf_Internal_Rela *rel; |
8d88c4ca NC |
1837 | Elf_Internal_Rela *relend; |
1838 | ||
b491616a | 1839 | if (info->relocateable) |
b34976b6 | 1840 | return TRUE; |
b491616a | 1841 | |
c434dee6 | 1842 | htab = elf64_x86_64_hash_table (info); |
8d88c4ca NC |
1843 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
1844 | sym_hashes = elf_sym_hashes (input_bfd); | |
1845 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1846 | ||
c434dee6 | 1847 | rel = relocs; |
8d88c4ca | 1848 | relend = relocs + input_section->reloc_count; |
c434dee6 | 1849 | for (; rel < relend; rel++) |
8d88c4ca | 1850 | { |
bffbf940 | 1851 | unsigned int r_type; |
8d88c4ca NC |
1852 | reloc_howto_type *howto; |
1853 | unsigned long r_symndx; | |
1854 | struct elf_link_hash_entry *h; | |
1855 | Elf_Internal_Sym *sym; | |
1856 | asection *sec; | |
c434dee6 | 1857 | bfd_vma off; |
8d88c4ca | 1858 | bfd_vma relocation; |
b34976b6 | 1859 | bfd_boolean unresolved_reloc; |
8d88c4ca | 1860 | bfd_reloc_status_type r; |
bffbf940 | 1861 | int tls_type; |
8d88c4ca | 1862 | |
c434dee6 | 1863 | r_type = ELF64_R_TYPE (rel->r_info); |
fe4770f4 AJ |
1864 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
1865 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
1866 | continue; | |
8d88c4ca | 1867 | |
bffbf940 | 1868 | if (r_type >= R_X86_64_max) |
8da6118f KH |
1869 | { |
1870 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 1871 | return FALSE; |
8da6118f | 1872 | } |
8d88c4ca | 1873 | |
b491616a | 1874 | howto = x86_64_elf_howto_table + r_type; |
c434dee6 | 1875 | r_symndx = ELF64_R_SYM (rel->r_info); |
8d88c4ca NC |
1876 | h = NULL; |
1877 | sym = NULL; | |
1878 | sec = NULL; | |
b34976b6 | 1879 | unresolved_reloc = FALSE; |
8d88c4ca | 1880 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
1881 | { |
1882 | sym = local_syms + r_symndx; | |
1883 | sec = local_sections[r_symndx]; | |
c434dee6 AJ |
1884 | |
1885 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); | |
8da6118f | 1886 | } |
8d88c4ca | 1887 | else |
8da6118f KH |
1888 | { |
1889 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1890 | while (h->root.type == bfd_link_hash_indirect | |
1891 | || h->root.type == bfd_link_hash_warning) | |
1892 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c434dee6 | 1893 | |
8da6118f KH |
1894 | if (h->root.type == bfd_link_hash_defined |
1895 | || h->root.type == bfd_link_hash_defweak) | |
1896 | { | |
1897 | sec = h->root.u.def.section; | |
c434dee6 | 1898 | if (sec->output_section == NULL) |
8da6118f | 1899 | { |
c434dee6 AJ |
1900 | /* Set a flag that will be cleared later if we find a |
1901 | relocation value for this symbol. output_section | |
1902 | is typically NULL for symbols satisfied by a shared | |
1903 | library. */ | |
b34976b6 | 1904 | unresolved_reloc = TRUE; |
8da6118f KH |
1905 | relocation = 0; |
1906 | } | |
1907 | else | |
1908 | relocation = (h->root.u.def.value | |
1909 | + sec->output_section->vma | |
1910 | + sec->output_offset); | |
1911 | } | |
1912 | else if (h->root.type == bfd_link_hash_undefweak) | |
1913 | relocation = 0; | |
671bae9c | 1914 | else if (info->shared |
671bae9c | 1915 | && !info->no_undefined |
70256ad8 AJ |
1916 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
1917 | relocation = 0; | |
8da6118f KH |
1918 | else |
1919 | { | |
1920 | if (! ((*info->callbacks->undefined_symbol) | |
1921 | (info, h->root.root.string, input_bfd, | |
c434dee6 | 1922 | input_section, rel->r_offset, |
8da6118f KH |
1923 | (!info->shared || info->no_undefined |
1924 | || ELF_ST_VISIBILITY (h->other))))) | |
b34976b6 | 1925 | return FALSE; |
8da6118f KH |
1926 | relocation = 0; |
1927 | } | |
1928 | } | |
70256ad8 AJ |
1929 | /* When generating a shared object, the relocations handled here are |
1930 | copied into the output file to be resolved at run time. */ | |
1931 | switch (r_type) | |
1932 | { | |
1933 | case R_X86_64_GOT32: | |
1934 | /* Relocation is to the entry for this symbol in the global | |
1935 | offset table. */ | |
70256ad8 AJ |
1936 | case R_X86_64_GOTPCREL: |
1937 | /* Use global offset table as symbol value. */ | |
c434dee6 AJ |
1938 | if (htab->sgot == NULL) |
1939 | abort (); | |
053579d7 | 1940 | |
51e0a107 | 1941 | if (h != NULL) |
70256ad8 | 1942 | { |
b34976b6 | 1943 | bfd_boolean dyn; |
c434dee6 AJ |
1944 | |
1945 | off = h->got.offset; | |
1946 | dyn = htab->elf.dynamic_sections_created; | |
51e0a107 | 1947 | |
c434dee6 | 1948 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h) |
51e0a107 | 1949 | || (info->shared |
c434dee6 AJ |
1950 | && (info->symbolic |
1951 | || h->dynindx == -1 | |
1952 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
51e0a107 JH |
1953 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) |
1954 | { | |
1955 | /* This is actually a static link, or it is a -Bsymbolic | |
1956 | link and the symbol is defined locally, or the symbol | |
407443a3 | 1957 | was forced to be local because of a version file. We |
51e0a107 JH |
1958 | must initialize this entry in the global offset table. |
1959 | Since the offset must always be a multiple of 8, we | |
1960 | use the least significant bit to record whether we | |
1961 | have initialized it already. | |
1962 | ||
1963 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
1964 | relocation entry to initialize the value. This is |
1965 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
1966 | if ((off & 1) != 0) |
1967 | off &= ~1; | |
1968 | else | |
1969 | { | |
1970 | bfd_put_64 (output_bfd, relocation, | |
c434dee6 | 1971 | htab->sgot->contents + off); |
51e0a107 JH |
1972 | h->got.offset |= 1; |
1973 | } | |
1974 | } | |
053579d7 | 1975 | else |
b34976b6 | 1976 | unresolved_reloc = FALSE; |
70256ad8 | 1977 | } |
51e0a107 JH |
1978 | else |
1979 | { | |
c434dee6 AJ |
1980 | if (local_got_offsets == NULL) |
1981 | abort (); | |
51e0a107 JH |
1982 | |
1983 | off = local_got_offsets[r_symndx]; | |
1984 | ||
1985 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
1986 | the least significant bit to record whether we have |
1987 | already generated the necessary reloc. */ | |
51e0a107 JH |
1988 | if ((off & 1) != 0) |
1989 | off &= ~1; | |
1990 | else | |
1991 | { | |
c434dee6 AJ |
1992 | bfd_put_64 (output_bfd, relocation, |
1993 | htab->sgot->contents + off); | |
51e0a107 JH |
1994 | |
1995 | if (info->shared) | |
1996 | { | |
947216bf | 1997 | asection *s; |
51e0a107 | 1998 | Elf_Internal_Rela outrel; |
947216bf | 1999 | bfd_byte *loc; |
70256ad8 | 2000 | |
51e0a107 JH |
2001 | /* We need to generate a R_X86_64_RELATIVE reloc |
2002 | for the dynamic linker. */ | |
947216bf AM |
2003 | s = htab->srelgot; |
2004 | if (s == NULL) | |
c434dee6 | 2005 | abort (); |
51e0a107 | 2006 | |
c434dee6 AJ |
2007 | outrel.r_offset = (htab->sgot->output_section->vma |
2008 | + htab->sgot->output_offset | |
51e0a107 JH |
2009 | + off); |
2010 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); | |
2011 | outrel.r_addend = relocation; | |
947216bf AM |
2012 | loc = s->contents; |
2013 | loc += s->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 2014 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
51e0a107 JH |
2015 | } |
2016 | ||
2017 | local_got_offsets[r_symndx] |= 1; | |
2018 | } | |
51e0a107 | 2019 | } |
6a2bda3f | 2020 | |
c434dee6 AJ |
2021 | if (off >= (bfd_vma) -2) |
2022 | abort (); | |
2023 | ||
2024 | relocation = htab->sgot->output_offset + off; | |
2025 | if (r_type == R_X86_64_GOTPCREL) | |
2026 | relocation += htab->sgot->output_section->vma; | |
2027 | ||
70256ad8 AJ |
2028 | break; |
2029 | ||
2030 | case R_X86_64_PLT32: | |
2031 | /* Relocation is to the entry for this symbol in the | |
2032 | procedure linkage table. */ | |
2033 | ||
2034 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 2035 | without using the procedure linkage table. */ |
70256ad8 AJ |
2036 | if (h == NULL) |
2037 | break; | |
2038 | ||
c434dee6 AJ |
2039 | if (h->plt.offset == (bfd_vma) -1 |
2040 | || htab->splt == NULL) | |
70256ad8 AJ |
2041 | { |
2042 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
2043 | happens when statically linking PIC code, or when |
2044 | using -Bsymbolic. */ | |
70256ad8 AJ |
2045 | break; |
2046 | } | |
2047 | ||
c434dee6 AJ |
2048 | relocation = (htab->splt->output_section->vma |
2049 | + htab->splt->output_offset | |
70256ad8 | 2050 | + h->plt.offset); |
b34976b6 | 2051 | unresolved_reloc = FALSE; |
70256ad8 AJ |
2052 | break; |
2053 | ||
fd8ab9e5 AJ |
2054 | case R_X86_64_PC8: |
2055 | case R_X86_64_PC16: | |
2056 | case R_X86_64_PC32: | |
70256ad8 AJ |
2057 | case R_X86_64_8: |
2058 | case R_X86_64_16: | |
2059 | case R_X86_64_32: | |
6b3db546 | 2060 | case R_X86_64_64: |
80643fbc | 2061 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 2062 | the same when it's zeroextended to 64 bit. */ |
c434dee6 AJ |
2063 | |
2064 | /* r_symndx will be zero only for relocs against symbols | |
2065 | from removed linkonce sections, or sections discarded by | |
2066 | a linker script. */ | |
2067 | if (r_symndx == 0 | |
2068 | || (input_section->flags & SEC_ALLOC) == 0) | |
2069 | break; | |
2070 | ||
2071 | if ((info->shared | |
2072 | && ((r_type != R_X86_64_PC8 | |
2073 | && r_type != R_X86_64_PC16 | |
2074 | && r_type != R_X86_64_PC32) | |
2075 | || (h != NULL | |
2076 | && h->dynindx != -1 | |
2077 | && (! info->symbolic | |
2078 | || (h->elf_link_hash_flags | |
2079 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
2080 | || (!info->shared | |
2081 | && h != NULL | |
2082 | && h->dynindx != -1 | |
2083 | && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
2084 | && (((h->elf_link_hash_flags | |
2085 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2086 | && (h->elf_link_hash_flags | |
2087 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2088 | || h->root.type == bfd_link_hash_undefweak | |
2089 | || h->root.type == bfd_link_hash_undefined))) | |
70256ad8 AJ |
2090 | { |
2091 | Elf_Internal_Rela outrel; | |
947216bf | 2092 | bfd_byte *loc; |
b34976b6 | 2093 | bfd_boolean skip, relocate; |
c434dee6 | 2094 | asection *sreloc; |
70256ad8 AJ |
2095 | |
2096 | /* When generating a shared object, these relocations | |
2097 | are copied into the output file to be resolved at run | |
407443a3 | 2098 | time. */ |
b34976b6 AM |
2099 | skip = FALSE; |
2100 | relocate = FALSE; | |
70256ad8 | 2101 | |
c629eae0 JJ |
2102 | outrel.r_offset = |
2103 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 2104 | rel->r_offset); |
c629eae0 | 2105 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 2106 | skip = TRUE; |
0fb19cbc | 2107 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2108 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
2109 | |
2110 | outrel.r_offset += (input_section->output_section->vma | |
2111 | + input_section->output_offset); | |
2112 | ||
2113 | if (skip) | |
0bb2d96a | 2114 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 2115 | |
fd8ab9e5 AJ |
2116 | /* h->dynindx may be -1 if this symbol was marked to |
2117 | become local. */ | |
2118 | else if (h != NULL | |
c434dee6 AJ |
2119 | && h->dynindx != -1 |
2120 | && (r_type == R_X86_64_PC8 | |
2121 | || r_type == R_X86_64_PC16 | |
2122 | || r_type == R_X86_64_PC32 | |
2123 | || !info->shared | |
2124 | || !info->symbolic | |
fd8ab9e5 AJ |
2125 | || (h->elf_link_hash_flags |
2126 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
70256ad8 | 2127 | { |
70256ad8 | 2128 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
c434dee6 | 2129 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
2130 | } |
2131 | else | |
2132 | { | |
c434dee6 | 2133 | /* This symbol is local, or marked to become local. */ |
607c0e09 AS |
2134 | if (r_type == R_X86_64_64) |
2135 | { | |
b34976b6 | 2136 | relocate = TRUE; |
607c0e09 AS |
2137 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
2138 | outrel.r_addend = relocation + rel->r_addend; | |
2139 | } | |
2140 | else | |
2141 | { | |
2142 | long sindx; | |
2143 | ||
2144 | if (h == NULL) | |
2145 | sec = local_sections[r_symndx]; | |
2146 | else | |
2147 | { | |
2148 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
2149 | || (h->root.type | |
2150 | == bfd_link_hash_defweak)); | |
2151 | sec = h->root.u.def.section; | |
2152 | } | |
2153 | if (sec != NULL && bfd_is_abs_section (sec)) | |
2154 | sindx = 0; | |
2155 | else if (sec == NULL || sec->owner == NULL) | |
2156 | { | |
2157 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2158 | return FALSE; |
607c0e09 AS |
2159 | } |
2160 | else | |
2161 | { | |
2162 | asection *osec; | |
2163 | ||
2164 | osec = sec->output_section; | |
2165 | sindx = elf_section_data (osec)->dynindx; | |
2166 | BFD_ASSERT (sindx > 0); | |
2167 | } | |
2168 | ||
2169 | outrel.r_info = ELF64_R_INFO (sindx, r_type); | |
2170 | outrel.r_addend = relocation + rel->r_addend; | |
2171 | } | |
70256ad8 AJ |
2172 | } |
2173 | ||
c434dee6 AJ |
2174 | sreloc = elf_section_data (input_section)->sreloc; |
2175 | if (sreloc == NULL) | |
2176 | abort (); | |
2177 | ||
947216bf AM |
2178 | loc = sreloc->contents; |
2179 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 2180 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
70256ad8 AJ |
2181 | |
2182 | /* If this reloc is against an external symbol, we do | |
2183 | not want to fiddle with the addend. Otherwise, we | |
2184 | need to include the symbol value so that it becomes | |
2185 | an addend for the dynamic reloc. */ | |
2186 | if (! relocate) | |
2187 | continue; | |
2188 | } | |
2189 | ||
2190 | break; | |
2191 | ||
bffbf940 JJ |
2192 | case R_X86_64_TLSGD: |
2193 | case R_X86_64_GOTTPOFF: | |
2194 | r_type = elf64_x86_64_tls_transition (info, r_type, h == NULL); | |
2195 | tls_type = GOT_UNKNOWN; | |
2196 | if (h == NULL && local_got_offsets) | |
2197 | tls_type = elf64_x86_64_local_got_tls_type (input_bfd) [r_symndx]; | |
2198 | else if (h != NULL) | |
2199 | { | |
2200 | tls_type = elf64_x86_64_hash_entry (h)->tls_type; | |
2201 | if (!info->shared && h->dynindx == -1 && tls_type == GOT_TLS_IE) | |
2202 | r_type = R_X86_64_TPOFF32; | |
2203 | } | |
2204 | if (r_type == R_X86_64_TLSGD) | |
2205 | { | |
2206 | if (tls_type == GOT_TLS_IE) | |
2207 | r_type = R_X86_64_GOTTPOFF; | |
2208 | } | |
2209 | ||
2210 | if (r_type == R_X86_64_TPOFF32) | |
2211 | { | |
2212 | BFD_ASSERT (! unresolved_reloc); | |
2213 | if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSGD) | |
2214 | { | |
2215 | unsigned int i; | |
abcf1d52 JJ |
2216 | static unsigned char tlsgd[8] |
2217 | = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 }; | |
bffbf940 JJ |
2218 | |
2219 | /* GD->LE transition. | |
abcf1d52 JJ |
2220 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
2221 | .word 0x6666; rex64; call __tls_get_addr@plt | |
bffbf940 JJ |
2222 | Change it into: |
2223 | movq %fs:0, %rax | |
2224 | leaq foo@tpoff(%rax), %rax */ | |
abcf1d52 JJ |
2225 | BFD_ASSERT (rel->r_offset >= 4); |
2226 | for (i = 0; i < 4; i++) | |
bffbf940 | 2227 | BFD_ASSERT (bfd_get_8 (input_bfd, |
abcf1d52 | 2228 | contents + rel->r_offset - 4 + i) |
bffbf940 | 2229 | == tlsgd[i]); |
abcf1d52 JJ |
2230 | BFD_ASSERT (rel->r_offset + 12 <= input_section->_raw_size); |
2231 | for (i = 0; i < 4; i++) | |
2232 | BFD_ASSERT (bfd_get_8 (input_bfd, | |
2233 | contents + rel->r_offset + 4 + i) | |
2234 | == tlsgd[i+4]); | |
bffbf940 JJ |
2235 | BFD_ASSERT (rel + 1 < relend); |
2236 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
abcf1d52 | 2237 | memcpy (contents + rel->r_offset - 4, |
bffbf940 JJ |
2238 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", |
2239 | 16); | |
2240 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
abcf1d52 | 2241 | contents + rel->r_offset + 8); |
bffbf940 JJ |
2242 | /* Skip R_X86_64_PLT32. */ |
2243 | rel++; | |
2244 | continue; | |
2245 | } | |
2246 | else | |
2247 | { | |
2248 | unsigned int val, type, reg; | |
2249 | ||
2250 | /* IE->LE transition: | |
2251 | Originally it can be one of: | |
2252 | movq foo@gottpoff(%rip), %reg | |
2253 | addq foo@gottpoff(%rip), %reg | |
2254 | We change it into: | |
2255 | movq $foo, %reg | |
2256 | leaq foo(%reg), %reg | |
2257 | addq $foo, %reg. */ | |
2258 | BFD_ASSERT (rel->r_offset >= 3); | |
2259 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 3); | |
2260 | BFD_ASSERT (val == 0x48 || val == 0x4c); | |
2261 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
2262 | BFD_ASSERT (type == 0x8b || type == 0x03); | |
2263 | reg = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
2264 | BFD_ASSERT ((reg & 0xc7) == 5); | |
2265 | reg >>= 3; | |
2266 | BFD_ASSERT (rel->r_offset + 4 <= input_section->_raw_size); | |
2267 | if (type == 0x8b) | |
2268 | { | |
2269 | /* movq */ | |
2270 | if (val == 0x4c) | |
2271 | bfd_put_8 (output_bfd, 0x49, | |
2272 | contents + rel->r_offset - 3); | |
2273 | bfd_put_8 (output_bfd, 0xc7, | |
2274 | contents + rel->r_offset - 2); | |
2275 | bfd_put_8 (output_bfd, 0xc0 | reg, | |
2276 | contents + rel->r_offset - 1); | |
2277 | } | |
2278 | else if (reg == 4) | |
2279 | { | |
2280 | /* addq -> addq - addressing with %rsp/%r12 is | |
2281 | special */ | |
2282 | if (val == 0x4c) | |
2283 | bfd_put_8 (output_bfd, 0x49, | |
2284 | contents + rel->r_offset - 3); | |
2285 | bfd_put_8 (output_bfd, 0x81, | |
2286 | contents + rel->r_offset - 2); | |
2287 | bfd_put_8 (output_bfd, 0xc0 | reg, | |
2288 | contents + rel->r_offset - 1); | |
2289 | } | |
2290 | else | |
2291 | { | |
2292 | /* addq -> leaq */ | |
2293 | if (val == 0x4c) | |
2294 | bfd_put_8 (output_bfd, 0x4d, | |
2295 | contents + rel->r_offset - 3); | |
2296 | bfd_put_8 (output_bfd, 0x8d, | |
2297 | contents + rel->r_offset - 2); | |
2298 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), | |
2299 | contents + rel->r_offset - 1); | |
2300 | } | |
2301 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
2302 | contents + rel->r_offset); | |
2303 | continue; | |
2304 | } | |
2305 | } | |
2306 | ||
2307 | if (htab->sgot == NULL) | |
2308 | abort (); | |
2309 | ||
2310 | if (h != NULL) | |
2311 | off = h->got.offset; | |
2312 | else | |
2313 | { | |
2314 | if (local_got_offsets == NULL) | |
2315 | abort (); | |
2316 | ||
2317 | off = local_got_offsets[r_symndx]; | |
2318 | } | |
2319 | ||
2320 | if ((off & 1) != 0) | |
2321 | off &= ~1; | |
26e41594 | 2322 | else |
bffbf940 JJ |
2323 | { |
2324 | Elf_Internal_Rela outrel; | |
947216bf | 2325 | bfd_byte *loc; |
bffbf940 JJ |
2326 | int dr_type, indx; |
2327 | ||
2328 | if (htab->srelgot == NULL) | |
2329 | abort (); | |
2330 | ||
2331 | outrel.r_offset = (htab->sgot->output_section->vma | |
2332 | + htab->sgot->output_offset + off); | |
2333 | ||
2334 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
2335 | if (r_type == R_X86_64_TLSGD) | |
2336 | dr_type = R_X86_64_DTPMOD64; | |
2337 | else | |
2338 | dr_type = R_X86_64_TPOFF64; | |
2339 | ||
2340 | bfd_put_64 (output_bfd, 0, htab->sgot->contents + off); | |
2341 | outrel.r_addend = 0; | |
2342 | if (dr_type == R_X86_64_TPOFF64 && indx == 0) | |
2343 | outrel.r_addend = relocation - dtpoff_base (info); | |
2344 | outrel.r_info = ELF64_R_INFO (indx, dr_type); | |
2345 | ||
947216bf AM |
2346 | loc = htab->srelgot->contents; |
2347 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
bffbf940 JJ |
2348 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
2349 | ||
2350 | if (r_type == R_X86_64_TLSGD) | |
2351 | { | |
2352 | if (indx == 0) | |
2353 | { | |
2354 | BFD_ASSERT (! unresolved_reloc); | |
2355 | bfd_put_64 (output_bfd, | |
2356 | relocation - dtpoff_base (info), | |
2357 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2358 | } | |
2359 | else | |
2360 | { | |
2361 | bfd_put_64 (output_bfd, 0, | |
2362 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2363 | outrel.r_info = ELF64_R_INFO (indx, | |
2364 | R_X86_64_DTPOFF64); | |
2365 | outrel.r_offset += GOT_ENTRY_SIZE; | |
2366 | htab->srelgot->reloc_count++; | |
947216bf AM |
2367 | loc += sizeof (Elf64_External_Rela); |
2368 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
bffbf940 JJ |
2369 | } |
2370 | } | |
2371 | ||
2372 | if (h != NULL) | |
2373 | h->got.offset |= 1; | |
2374 | else | |
2375 | local_got_offsets[r_symndx] |= 1; | |
2376 | } | |
2377 | ||
2378 | if (off >= (bfd_vma) -2) | |
2379 | abort (); | |
2380 | if (r_type == ELF64_R_TYPE (rel->r_info)) | |
2381 | { | |
2382 | relocation = htab->sgot->output_section->vma | |
2383 | + htab->sgot->output_offset + off; | |
b34976b6 | 2384 | unresolved_reloc = FALSE; |
bffbf940 JJ |
2385 | } |
2386 | else | |
2387 | { | |
2388 | unsigned int i; | |
abcf1d52 JJ |
2389 | static unsigned char tlsgd[8] |
2390 | = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 }; | |
bffbf940 JJ |
2391 | |
2392 | /* GD->IE transition. | |
abcf1d52 JJ |
2393 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
2394 | .word 0x6666; rex64; call __tls_get_addr@plt | |
bffbf940 JJ |
2395 | Change it into: |
2396 | movq %fs:0, %rax | |
2397 | addq foo@gottpoff(%rip), %rax */ | |
abcf1d52 JJ |
2398 | BFD_ASSERT (rel->r_offset >= 4); |
2399 | for (i = 0; i < 4; i++) | |
26e41594 | 2400 | BFD_ASSERT (bfd_get_8 (input_bfd, |
abcf1d52 | 2401 | contents + rel->r_offset - 4 + i) |
bffbf940 | 2402 | == tlsgd[i]); |
abcf1d52 JJ |
2403 | BFD_ASSERT (rel->r_offset + 12 <= input_section->_raw_size); |
2404 | for (i = 0; i < 4; i++) | |
26e41594 | 2405 | BFD_ASSERT (bfd_get_8 (input_bfd, |
abcf1d52 JJ |
2406 | contents + rel->r_offset + 4 + i) |
2407 | == tlsgd[i+4]); | |
bffbf940 JJ |
2408 | BFD_ASSERT (rel + 1 < relend); |
2409 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
abcf1d52 | 2410 | memcpy (contents + rel->r_offset - 4, |
bffbf940 JJ |
2411 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", |
2412 | 16); | |
2413 | ||
2414 | relocation = (htab->sgot->output_section->vma | |
2415 | + htab->sgot->output_offset + off | |
2416 | - rel->r_offset | |
2417 | - input_section->output_section->vma | |
2418 | - input_section->output_offset | |
abcf1d52 | 2419 | - 12); |
bffbf940 | 2420 | bfd_put_32 (output_bfd, relocation, |
abcf1d52 | 2421 | contents + rel->r_offset + 8); |
bffbf940 JJ |
2422 | /* Skip R_X86_64_PLT32. */ |
2423 | rel++; | |
2424 | continue; | |
2425 | } | |
2426 | break; | |
2427 | ||
2428 | case R_X86_64_TLSLD: | |
2429 | if (! info->shared) | |
2430 | { | |
2431 | /* LD->LE transition: | |
2432 | Ensure it is: | |
2433 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr@plt. | |
2434 | We change it into: | |
2435 | .word 0x6666; .byte 0x66; movl %fs:0, %rax. */ | |
2436 | BFD_ASSERT (rel->r_offset >= 3); | |
2437 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 3) | |
2438 | == 0x48); | |
2439 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2) | |
2440 | == 0x8d); | |
2441 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 1) | |
2442 | == 0x3d); | |
2443 | BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size); | |
2444 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4) | |
2445 | == 0xe8); | |
2446 | BFD_ASSERT (rel + 1 < relend); | |
2447 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
2448 | memcpy (contents + rel->r_offset - 3, | |
2449 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
2450 | /* Skip R_X86_64_PLT32. */ | |
2451 | rel++; | |
2452 | continue; | |
2453 | } | |
2454 | ||
2455 | if (htab->sgot == NULL) | |
2456 | abort (); | |
2457 | ||
2458 | off = htab->tls_ld_got.offset; | |
2459 | if (off & 1) | |
2460 | off &= ~1; | |
2461 | else | |
2462 | { | |
2463 | Elf_Internal_Rela outrel; | |
947216bf | 2464 | bfd_byte *loc; |
bffbf940 JJ |
2465 | |
2466 | if (htab->srelgot == NULL) | |
2467 | abort (); | |
2468 | ||
2469 | outrel.r_offset = (htab->sgot->output_section->vma | |
2470 | + htab->sgot->output_offset + off); | |
2471 | ||
2472 | bfd_put_64 (output_bfd, 0, | |
2473 | htab->sgot->contents + off); | |
2474 | bfd_put_64 (output_bfd, 0, | |
2475 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2476 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_DTPMOD64); | |
2477 | outrel.r_addend = 0; | |
947216bf AM |
2478 | loc = htab->srelgot->contents; |
2479 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
bffbf940 JJ |
2480 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
2481 | htab->tls_ld_got.offset |= 1; | |
2482 | } | |
2483 | relocation = htab->sgot->output_section->vma | |
2484 | + htab->sgot->output_offset + off; | |
b34976b6 | 2485 | unresolved_reloc = FALSE; |
bffbf940 JJ |
2486 | break; |
2487 | ||
2488 | case R_X86_64_DTPOFF32: | |
a45bb67d | 2489 | if (info->shared || (input_section->flags & SEC_CODE) == 0) |
bffbf940 JJ |
2490 | relocation -= dtpoff_base (info); |
2491 | else | |
2492 | relocation = tpoff (info, relocation); | |
2493 | break; | |
2494 | ||
2495 | case R_X86_64_TPOFF32: | |
2496 | BFD_ASSERT (! info->shared); | |
2497 | relocation = tpoff (info, relocation); | |
2498 | break; | |
2499 | ||
70256ad8 AJ |
2500 | default: |
2501 | break; | |
2502 | } | |
8d88c4ca | 2503 | |
239e1f3a AM |
2504 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
2505 | because such sections are not SEC_ALLOC and thus ld.so will | |
2506 | not process them. */ | |
c434dee6 | 2507 | if (unresolved_reloc |
239e1f3a | 2508 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
c434dee6 AJ |
2509 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) |
2510 | (*_bfd_error_handler) | |
2511 | (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), | |
2512 | bfd_archive_filename (input_bfd), | |
2513 | bfd_get_section_name (input_bfd, input_section), | |
2514 | (long) rel->r_offset, | |
2515 | h->root.root.string); | |
2516 | ||
8d88c4ca | 2517 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
2518 | contents, rel->r_offset, |
2519 | relocation, rel->r_addend); | |
8d88c4ca NC |
2520 | |
2521 | if (r != bfd_reloc_ok) | |
8da6118f | 2522 | { |
c434dee6 AJ |
2523 | const char *name; |
2524 | ||
2525 | if (h != NULL) | |
2526 | name = h->root.root.string; | |
2527 | else | |
8da6118f | 2528 | { |
c434dee6 AJ |
2529 | name = bfd_elf_string_from_elf_section (input_bfd, |
2530 | symtab_hdr->sh_link, | |
2531 | sym->st_name); | |
2532 | if (name == NULL) | |
b34976b6 | 2533 | return FALSE; |
c434dee6 AJ |
2534 | if (*name == '\0') |
2535 | name = bfd_section_name (input_bfd, sec); | |
2536 | } | |
2537 | ||
2538 | if (r == bfd_reloc_overflow) | |
2539 | { | |
2540 | ||
2541 | if (! ((*info->callbacks->reloc_overflow) | |
2542 | (info, name, howto->name, (bfd_vma) 0, | |
2543 | input_bfd, input_section, rel->r_offset))) | |
b34976b6 | 2544 | return FALSE; |
c434dee6 AJ |
2545 | } |
2546 | else | |
2547 | { | |
2548 | (*_bfd_error_handler) | |
2549 | (_("%s(%s+0x%lx): reloc against `%s': error %d"), | |
2550 | bfd_archive_filename (input_bfd), | |
2551 | bfd_get_section_name (input_bfd, input_section), | |
2552 | (long) rel->r_offset, name, (int) r); | |
b34976b6 | 2553 | return FALSE; |
8da6118f KH |
2554 | } |
2555 | } | |
8d88c4ca | 2556 | } |
70256ad8 | 2557 | |
b34976b6 | 2558 | return TRUE; |
70256ad8 AJ |
2559 | } |
2560 | ||
2561 | /* Finish up dynamic symbol handling. We set the contents of various | |
2562 | dynamic sections here. */ | |
2563 | ||
b34976b6 | 2564 | static bfd_boolean |
70256ad8 AJ |
2565 | elf64_x86_64_finish_dynamic_symbol (output_bfd, info, h, sym) |
2566 | bfd *output_bfd; | |
2567 | struct bfd_link_info *info; | |
2568 | struct elf_link_hash_entry *h; | |
2569 | Elf_Internal_Sym *sym; | |
2570 | { | |
c434dee6 | 2571 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 | 2572 | |
c434dee6 | 2573 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
2574 | |
2575 | if (h->plt.offset != (bfd_vma) -1) | |
2576 | { | |
70256ad8 AJ |
2577 | bfd_vma plt_index; |
2578 | bfd_vma got_offset; | |
2579 | Elf_Internal_Rela rela; | |
947216bf | 2580 | bfd_byte *loc; |
70256ad8 AJ |
2581 | |
2582 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 2583 | it up. */ |
c434dee6 AJ |
2584 | if (h->dynindx == -1 |
2585 | || htab->splt == NULL | |
2586 | || htab->sgotplt == NULL | |
2587 | || htab->srelplt == NULL) | |
2588 | abort (); | |
70256ad8 AJ |
2589 | |
2590 | /* Get the index in the procedure linkage table which | |
2591 | corresponds to this symbol. This is the index of this symbol | |
2592 | in all the symbols for which we are making plt entries. The | |
2593 | first entry in the procedure linkage table is reserved. */ | |
2594 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
2595 | ||
2596 | /* Get the offset into the .got table of the entry that | |
407443a3 | 2597 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
fe4770f4 | 2598 | bytes. The first three are reserved for the dynamic linker. */ |
70256ad8 AJ |
2599 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
2600 | ||
2601 | /* Fill in the entry in the procedure linkage table. */ | |
c434dee6 | 2602 | memcpy (htab->splt->contents + h->plt.offset, elf64_x86_64_plt_entry, |
70256ad8 AJ |
2603 | PLT_ENTRY_SIZE); |
2604 | ||
2605 | /* Insert the relocation positions of the plt section. The magic | |
2606 | numbers at the end of the statements are the positions of the | |
2607 | relocations in the plt section. */ | |
653165cc AJ |
2608 | /* Put offset for jmp *name@GOTPCREL(%rip), since the |
2609 | instruction uses 6 bytes, subtract this value. */ | |
2610 | bfd_put_32 (output_bfd, | |
c434dee6 AJ |
2611 | (htab->sgotplt->output_section->vma |
2612 | + htab->sgotplt->output_offset | |
653165cc | 2613 | + got_offset |
c434dee6 AJ |
2614 | - htab->splt->output_section->vma |
2615 | - htab->splt->output_offset | |
653165cc AJ |
2616 | - h->plt.offset |
2617 | - 6), | |
c434dee6 | 2618 | htab->splt->contents + h->plt.offset + 2); |
653165cc AJ |
2619 | /* Put relocation index. */ |
2620 | bfd_put_32 (output_bfd, plt_index, | |
c434dee6 | 2621 | htab->splt->contents + h->plt.offset + 7); |
653165cc AJ |
2622 | /* Put offset for jmp .PLT0. */ |
2623 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), | |
c434dee6 | 2624 | htab->splt->contents + h->plt.offset + 12); |
70256ad8 | 2625 | |
653165cc AJ |
2626 | /* Fill in the entry in the global offset table, initially this |
2627 | points to the pushq instruction in the PLT which is at offset 6. */ | |
c434dee6 AJ |
2628 | bfd_put_64 (output_bfd, (htab->splt->output_section->vma |
2629 | + htab->splt->output_offset | |
70256ad8 | 2630 | + h->plt.offset + 6), |
c434dee6 | 2631 | htab->sgotplt->contents + got_offset); |
70256ad8 AJ |
2632 | |
2633 | /* Fill in the entry in the .rela.plt section. */ | |
c434dee6 AJ |
2634 | rela.r_offset = (htab->sgotplt->output_section->vma |
2635 | + htab->sgotplt->output_offset | |
70256ad8 AJ |
2636 | + got_offset); |
2637 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_JUMP_SLOT); | |
2638 | rela.r_addend = 0; | |
947216bf | 2639 | loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela); |
c434dee6 | 2640 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 AJ |
2641 | |
2642 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2643 | { | |
2644 | /* Mark the symbol as undefined, rather than as defined in | |
c434dee6 AJ |
2645 | the .plt section. Leave the value alone. This is a clue |
2646 | for the dynamic linker, to make function pointer | |
2647 | comparisons work between an application and shared | |
2648 | library. */ | |
70256ad8 AJ |
2649 | sym->st_shndx = SHN_UNDEF; |
2650 | } | |
2651 | } | |
2652 | ||
bffbf940 JJ |
2653 | if (h->got.offset != (bfd_vma) -1 |
2654 | && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_GD | |
2655 | && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE) | |
053579d7 | 2656 | { |
053579d7 | 2657 | Elf_Internal_Rela rela; |
947216bf | 2658 | bfd_byte *loc; |
053579d7 AJ |
2659 | |
2660 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 2661 | up. */ |
c434dee6 AJ |
2662 | if (htab->sgot == NULL || htab->srelgot == NULL) |
2663 | abort (); | |
053579d7 | 2664 | |
c434dee6 AJ |
2665 | rela.r_offset = (htab->sgot->output_section->vma |
2666 | + htab->sgot->output_offset | |
dc810e39 | 2667 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
2668 | |
2669 | /* If this is a static link, or it is a -Bsymbolic link and the | |
2670 | symbol is defined locally or was forced to be local because | |
2671 | of a version file, we just want to emit a RELATIVE reloc. | |
2672 | The entry in the global offset table will already have been | |
2673 | initialized in the relocate_section function. */ | |
c434dee6 AJ |
2674 | if (info->shared |
2675 | && (info->symbolic | |
2676 | || h->dynindx == -1 | |
2677 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
2678 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
053579d7 | 2679 | { |
cc78d0af | 2680 | BFD_ASSERT((h->got.offset & 1) != 0); |
053579d7 AJ |
2681 | rela.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
2682 | rela.r_addend = (h->root.u.def.value | |
2683 | + h->root.u.def.section->output_section->vma | |
2684 | + h->root.u.def.section->output_offset); | |
2685 | } | |
2686 | else | |
2687 | { | |
2688 | BFD_ASSERT((h->got.offset & 1) == 0); | |
c434dee6 AJ |
2689 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
2690 | htab->sgot->contents + h->got.offset); | |
053579d7 AJ |
2691 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_GLOB_DAT); |
2692 | rela.r_addend = 0; | |
2693 | } | |
2694 | ||
947216bf AM |
2695 | loc = htab->srelgot->contents; |
2696 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 2697 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
053579d7 AJ |
2698 | } |
2699 | ||
70256ad8 AJ |
2700 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
2701 | { | |
70256ad8 | 2702 | Elf_Internal_Rela rela; |
947216bf | 2703 | bfd_byte *loc; |
70256ad8 AJ |
2704 | |
2705 | /* This symbol needs a copy reloc. Set it up. */ | |
2706 | ||
c434dee6 AJ |
2707 | if (h->dynindx == -1 |
2708 | || (h->root.type != bfd_link_hash_defined | |
2709 | && h->root.type != bfd_link_hash_defweak) | |
2710 | || htab->srelbss == NULL) | |
2711 | abort (); | |
70256ad8 AJ |
2712 | |
2713 | rela.r_offset = (h->root.u.def.value | |
2714 | + h->root.u.def.section->output_section->vma | |
2715 | + h->root.u.def.section->output_offset); | |
2716 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_COPY); | |
2717 | rela.r_addend = 0; | |
947216bf AM |
2718 | loc = htab->srelbss->contents; |
2719 | loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 2720 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 AJ |
2721 | } |
2722 | ||
2723 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2724 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
2725 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2726 | sym->st_shndx = SHN_ABS; | |
2727 | ||
b34976b6 | 2728 | return TRUE; |
70256ad8 AJ |
2729 | } |
2730 | ||
c434dee6 AJ |
2731 | /* Used to decide how to sort relocs in an optimal manner for the |
2732 | dynamic linker, before writing them out. */ | |
2733 | ||
2734 | static enum elf_reloc_type_class | |
2735 | elf64_x86_64_reloc_type_class (rela) | |
2736 | const Elf_Internal_Rela *rela; | |
2737 | { | |
2738 | switch ((int) ELF64_R_TYPE (rela->r_info)) | |
2739 | { | |
2740 | case R_X86_64_RELATIVE: | |
2741 | return reloc_class_relative; | |
2742 | case R_X86_64_JUMP_SLOT: | |
2743 | return reloc_class_plt; | |
2744 | case R_X86_64_COPY: | |
2745 | return reloc_class_copy; | |
2746 | default: | |
2747 | return reloc_class_normal; | |
2748 | } | |
2749 | } | |
2750 | ||
70256ad8 AJ |
2751 | /* Finish up the dynamic sections. */ |
2752 | ||
b34976b6 | 2753 | static bfd_boolean |
70256ad8 AJ |
2754 | elf64_x86_64_finish_dynamic_sections (output_bfd, info) |
2755 | bfd *output_bfd; | |
2756 | struct bfd_link_info *info; | |
2757 | { | |
c434dee6 | 2758 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2759 | bfd *dynobj; |
2760 | asection *sdyn; | |
70256ad8 | 2761 | |
c434dee6 AJ |
2762 | htab = elf64_x86_64_hash_table (info); |
2763 | dynobj = htab->elf.dynobj; | |
70256ad8 AJ |
2764 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
2765 | ||
c434dee6 | 2766 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 2767 | { |
70256ad8 AJ |
2768 | Elf64_External_Dyn *dyncon, *dynconend; |
2769 | ||
c434dee6 AJ |
2770 | if (sdyn == NULL || htab->sgot == NULL) |
2771 | abort (); | |
70256ad8 AJ |
2772 | |
2773 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
2774 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
2775 | for (; dyncon < dynconend; dyncon++) | |
2776 | { | |
2777 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
2778 | asection *s; |
2779 | ||
2780 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); | |
2781 | ||
2782 | switch (dyn.d_tag) | |
2783 | { | |
2784 | default: | |
053579d7 | 2785 | continue; |
70256ad8 AJ |
2786 | |
2787 | case DT_PLTGOT: | |
c434dee6 AJ |
2788 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
2789 | break; | |
70256ad8 AJ |
2790 | |
2791 | case DT_JMPREL: | |
c434dee6 AJ |
2792 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
2793 | break; | |
70256ad8 | 2794 | |
c434dee6 AJ |
2795 | case DT_PLTRELSZ: |
2796 | s = htab->srelplt->output_section; | |
2797 | if (s->_cooked_size != 0) | |
2798 | dyn.d_un.d_val = s->_cooked_size; | |
2799 | else | |
2800 | dyn.d_un.d_val = s->_raw_size; | |
70256ad8 AJ |
2801 | break; |
2802 | ||
2803 | case DT_RELASZ: | |
c434dee6 AJ |
2804 | /* The procedure linkage table relocs (DT_JMPREL) should |
2805 | not be included in the overall relocs (DT_RELA). | |
2806 | Therefore, we override the DT_RELASZ entry here to | |
2807 | make it not include the JMPREL relocs. Since the | |
2808 | linker script arranges for .rela.plt to follow all | |
2809 | other relocation sections, we don't have to worry | |
2810 | about changing the DT_RELA entry. */ | |
2811 | if (htab->srelplt != NULL) | |
70256ad8 | 2812 | { |
c434dee6 AJ |
2813 | s = htab->srelplt->output_section; |
2814 | if (s->_cooked_size != 0) | |
2815 | dyn.d_un.d_val -= s->_cooked_size; | |
2816 | else | |
2817 | dyn.d_un.d_val -= s->_raw_size; | |
70256ad8 AJ |
2818 | } |
2819 | break; | |
70256ad8 | 2820 | } |
c434dee6 | 2821 | |
70256ad8 AJ |
2822 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
2823 | } | |
2824 | ||
c434dee6 AJ |
2825 | /* Fill in the special first entry in the procedure linkage table. */ |
2826 | if (htab->splt && htab->splt->_raw_size > 0) | |
70256ad8 | 2827 | { |
653165cc | 2828 | /* Fill in the first entry in the procedure linkage table. */ |
c434dee6 AJ |
2829 | memcpy (htab->splt->contents, elf64_x86_64_plt0_entry, |
2830 | PLT_ENTRY_SIZE); | |
653165cc AJ |
2831 | /* Add offset for pushq GOT+8(%rip), since the instruction |
2832 | uses 6 bytes subtract this value. */ | |
2833 | bfd_put_32 (output_bfd, | |
c434dee6 AJ |
2834 | (htab->sgotplt->output_section->vma |
2835 | + htab->sgotplt->output_offset | |
653165cc | 2836 | + 8 |
c434dee6 AJ |
2837 | - htab->splt->output_section->vma |
2838 | - htab->splt->output_offset | |
653165cc | 2839 | - 6), |
c434dee6 | 2840 | htab->splt->contents + 2); |
653165cc AJ |
2841 | /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to |
2842 | the end of the instruction. */ | |
2843 | bfd_put_32 (output_bfd, | |
c434dee6 AJ |
2844 | (htab->sgotplt->output_section->vma |
2845 | + htab->sgotplt->output_offset | |
653165cc | 2846 | + 16 |
c434dee6 AJ |
2847 | - htab->splt->output_section->vma |
2848 | - htab->splt->output_offset | |
653165cc | 2849 | - 12), |
c434dee6 | 2850 | htab->splt->contents + 8); |
653165cc | 2851 | |
c434dee6 AJ |
2852 | elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize = |
2853 | PLT_ENTRY_SIZE; | |
70256ad8 | 2854 | } |
70256ad8 AJ |
2855 | } |
2856 | ||
c434dee6 | 2857 | if (htab->sgotplt) |
70256ad8 | 2858 | { |
c434dee6 AJ |
2859 | /* Fill in the first three entries in the global offset table. */ |
2860 | if (htab->sgotplt->_raw_size > 0) | |
2861 | { | |
2862 | /* Set the first entry in the global offset table to the address of | |
2863 | the dynamic section. */ | |
2864 | if (sdyn == NULL) | |
2865 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents); | |
2866 | else | |
2867 | bfd_put_64 (output_bfd, | |
2868 | sdyn->output_section->vma + sdyn->output_offset, | |
2869 | htab->sgotplt->contents); | |
2870 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ | |
2871 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE); | |
2872 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE*2); | |
2873 | } | |
70256ad8 | 2874 | |
c434dee6 AJ |
2875 | elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = |
2876 | GOT_ENTRY_SIZE; | |
2877 | } | |
70256ad8 | 2878 | |
b34976b6 | 2879 | return TRUE; |
8d88c4ca NC |
2880 | } |
2881 | ||
8df9fc9d | 2882 | |
70256ad8 AJ |
2883 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec |
2884 | #define TARGET_LITTLE_NAME "elf64-x86-64" | |
2885 | #define ELF_ARCH bfd_arch_i386 | |
2886 | #define ELF_MACHINE_CODE EM_X86_64 | |
2887 | #define ELF_MAXPAGESIZE 0x100000 | |
2888 | ||
2889 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 2890 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
2891 | #define elf_backend_want_got_plt 1 |
2892 | #define elf_backend_plt_readonly 1 | |
2893 | #define elf_backend_want_plt_sym 0 | |
2894 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
2895 | #define elf_backend_plt_header_size PLT_ENTRY_SIZE | |
b491616a | 2896 | #define elf_backend_rela_normal 1 |
70256ad8 AJ |
2897 | |
2898 | #define elf_info_to_howto elf64_x86_64_info_to_howto | |
70256ad8 | 2899 | |
70256ad8 AJ |
2900 | #define bfd_elf64_bfd_link_hash_table_create \ |
2901 | elf64_x86_64_link_hash_table_create | |
407443a3 | 2902 | #define bfd_elf64_bfd_reloc_type_lookup elf64_x86_64_reloc_type_lookup |
70256ad8 AJ |
2903 | |
2904 | #define elf_backend_adjust_dynamic_symbol elf64_x86_64_adjust_dynamic_symbol | |
2905 | #define elf_backend_check_relocs elf64_x86_64_check_relocs | |
c434dee6 AJ |
2906 | #define elf_backend_copy_indirect_symbol elf64_x86_64_copy_indirect_symbol |
2907 | #define elf_backend_create_dynamic_sections elf64_x86_64_create_dynamic_sections | |
2908 | #define elf_backend_finish_dynamic_sections elf64_x86_64_finish_dynamic_sections | |
70256ad8 AJ |
2909 | #define elf_backend_finish_dynamic_symbol elf64_x86_64_finish_dynamic_symbol |
2910 | #define elf_backend_gc_mark_hook elf64_x86_64_gc_mark_hook | |
2911 | #define elf_backend_gc_sweep_hook elf64_x86_64_gc_sweep_hook | |
3bab7989 ML |
2912 | #define elf_backend_grok_prstatus elf64_x86_64_grok_prstatus |
2913 | #define elf_backend_grok_psinfo elf64_x86_64_grok_psinfo | |
c434dee6 | 2914 | #define elf_backend_reloc_type_class elf64_x86_64_reloc_type_class |
70256ad8 AJ |
2915 | #define elf_backend_relocate_section elf64_x86_64_relocate_section |
2916 | #define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections | |
407443a3 | 2917 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
bffbf940 | 2918 | #define bfd_elf64_mkobject elf64_x86_64_mkobject |
8d88c4ca NC |
2919 | |
2920 | #include "elf64-target.h" |