Commit | Line | Data |
---|---|---|
8d88c4ca | 1 | /* X86-64 specific support for 64-bit ELF |
3eb128b2 AM |
2 | Copyright 2000, 2001, 2002, 2003, 2004, 2005 |
3 | Free Software Foundation, Inc. | |
8d88c4ca NC |
4 | Contributed by Jan Hubicka <jh@suse.cz>. |
5 | ||
ae9a127f | 6 | This file is part of BFD, the Binary File Descriptor library. |
8d88c4ca | 7 | |
ae9a127f NC |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
8d88c4ca | 12 | |
ae9a127f NC |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
8d88c4ca | 17 | |
ae9a127f NC |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
3e110533 | 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
8d88c4ca NC |
21 | |
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
c434dee6 | 24 | #include "bfdlink.h" |
8d88c4ca NC |
25 | #include "libbfd.h" |
26 | #include "elf-bfd.h" | |
27 | ||
28 | #include "elf/x86-64.h" | |
29 | ||
8d88c4ca NC |
30 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
31 | #define MINUS_ONE (~ (bfd_vma) 0) | |
32 | ||
33 | /* The relocation "howto" table. Order of fields: | |
407443a3 AJ |
34 | type, size, bitsize, pc_relative, complain_on_overflow, |
35 | special_function, name, partial_inplace, src_mask, dst_pack, pcrel_offset. */ | |
70256ad8 AJ |
36 | static reloc_howto_type x86_64_elf_howto_table[] = |
37 | { | |
b34976b6 AM |
38 | HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
39 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, | |
40 | FALSE), | |
41 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
42 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, | |
43 | FALSE), | |
44 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
45 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, | |
46 | TRUE), | |
47 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
48 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, | |
49 | FALSE), | |
50 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
51 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, | |
52 | TRUE), | |
53 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
54 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, | |
55 | FALSE), | |
56 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
57 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, | |
58 | MINUS_ONE, FALSE), | |
59 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
60 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, | |
61 | MINUS_ONE, FALSE), | |
62 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
63 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, | |
64 | MINUS_ONE, FALSE), | |
65 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
66 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, | |
67 | 0xffffffff, TRUE), | |
68 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, | |
69 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
70 | FALSE), | |
71 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
72 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, | |
73 | FALSE), | |
74 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
75 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), | |
b0360d8c | 76 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
b34976b6 | 77 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), |
ac2aa337 | 78 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
b34976b6 AM |
79 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), |
80 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
81 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), | |
82 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
83 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, | |
84 | MINUS_ONE, FALSE), | |
85 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
86 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, | |
87 | MINUS_ONE, FALSE), | |
88 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
89 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, | |
90 | MINUS_ONE, FALSE), | |
91 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
92 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, | |
93 | 0xffffffff, TRUE), | |
94 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
95 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, | |
96 | 0xffffffff, TRUE), | |
ac2aa337 | 97 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
b34976b6 AM |
98 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, |
99 | 0xffffffff, FALSE), | |
100 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
101 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, | |
102 | 0xffffffff, TRUE), | |
103 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
104 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, | |
105 | 0xffffffff, FALSE), | |
d6ab8113 JB |
106 | HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
107 | bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE, | |
108 | TRUE), | |
109 | HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
110 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", | |
111 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
112 | HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
113 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", | |
114 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
fe4770f4 | 115 | |
a33d77bc JB |
116 | /* We have a gap in the reloc numbers here. |
117 | R_X86_64_standard counts the number up to this point, and | |
118 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
119 | R_X86_64_GNU_VT* to form an index into this table. */ | |
120 | #define R_X86_64_standard (R_X86_64_GOTPC32 + 1) | |
121 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) | |
122 | ||
fe4770f4 | 123 | /* GNU extension to record C++ vtable hierarchy. */ |
b34976b6 AM |
124 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
125 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
126 | |
127 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
128 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
129 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
130 | FALSE) | |
8d88c4ca NC |
131 | }; |
132 | ||
133 | /* Map BFD relocs to the x86_64 elf relocs. */ | |
70256ad8 AJ |
134 | struct elf_reloc_map |
135 | { | |
8d88c4ca NC |
136 | bfd_reloc_code_real_type bfd_reloc_val; |
137 | unsigned char elf_reloc_val; | |
138 | }; | |
139 | ||
dc810e39 | 140 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 141 | { |
70256ad8 AJ |
142 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
143 | { BFD_RELOC_64, R_X86_64_64, }, | |
144 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
145 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
146 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
147 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
148 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
149 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
150 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
151 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
152 | { BFD_RELOC_32, R_X86_64_32, }, | |
153 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
154 | { BFD_RELOC_16, R_X86_64_16, }, | |
155 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
156 | { BFD_RELOC_8, R_X86_64_8, }, | |
157 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
158 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
159 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
160 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
161 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
162 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
163 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
164 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
165 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
166 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
167 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
168 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
fe4770f4 AJ |
169 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
170 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
171 | }; |
172 | ||
8d88c4ca NC |
173 | |
174 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
175 | static reloc_howto_type * | |
27482721 AJ |
176 | elf64_x86_64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
177 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
178 | { |
179 | unsigned int i; | |
27482721 | 180 | |
8d88c4ca NC |
181 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
182 | i++) | |
183 | { | |
184 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
ffaef159 | 185 | return &x86_64_elf_howto_table[i]; |
8d88c4ca NC |
186 | } |
187 | return 0; | |
188 | } | |
189 | ||
8d88c4ca | 190 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 191 | |
8d88c4ca | 192 | static void |
27482721 AJ |
193 | elf64_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
194 | Elf_Internal_Rela *dst) | |
8d88c4ca | 195 | { |
fe4770f4 | 196 | unsigned r_type, i; |
8d88c4ca NC |
197 | |
198 | r_type = ELF64_R_TYPE (dst->r_info); | |
d0fb9a8d JJ |
199 | if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT |
200 | || r_type >= (unsigned int) R_X86_64_max) | |
fe4770f4 | 201 | { |
a33d77bc | 202 | if (r_type >= (unsigned int) R_X86_64_standard) |
d0fb9a8d JJ |
203 | { |
204 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), | |
205 | abfd, (int) r_type); | |
206 | r_type = R_X86_64_NONE; | |
207 | } | |
fe4770f4 AJ |
208 | i = r_type; |
209 | } | |
210 | else | |
a33d77bc | 211 | i = r_type - (unsigned int) R_X86_64_vt_offset; |
fe4770f4 | 212 | cache_ptr->howto = &x86_64_elf_howto_table[i]; |
8d88c4ca NC |
213 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
214 | } | |
70256ad8 | 215 | \f |
3bab7989 | 216 | /* Support for core dump NOTE sections. */ |
b34976b6 | 217 | static bfd_boolean |
27482721 | 218 | elf64_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
219 | { |
220 | int offset; | |
eea6121a | 221 | size_t size; |
3bab7989 ML |
222 | |
223 | switch (note->descsz) | |
224 | { | |
225 | default: | |
b34976b6 | 226 | return FALSE; |
3bab7989 ML |
227 | |
228 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ | |
229 | /* pr_cursig */ | |
cedb70c5 | 230 | elf_tdata (abfd)->core_signal |
3bab7989 ML |
231 | = bfd_get_16 (abfd, note->descdata + 12); |
232 | ||
233 | /* pr_pid */ | |
cedb70c5 | 234 | elf_tdata (abfd)->core_pid |
3bab7989 ML |
235 | = bfd_get_32 (abfd, note->descdata + 32); |
236 | ||
237 | /* pr_reg */ | |
238 | offset = 112; | |
eea6121a | 239 | size = 216; |
3bab7989 ML |
240 | |
241 | break; | |
242 | } | |
243 | ||
244 | /* Make a ".reg/999" section. */ | |
245 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 246 | size, note->descpos + offset); |
3bab7989 ML |
247 | } |
248 | ||
b34976b6 | 249 | static bfd_boolean |
27482721 | 250 | elf64_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
251 | { |
252 | switch (note->descsz) | |
253 | { | |
254 | default: | |
b34976b6 | 255 | return FALSE; |
3bab7989 ML |
256 | |
257 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ | |
258 | elf_tdata (abfd)->core_program | |
259 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); | |
260 | elf_tdata (abfd)->core_command | |
261 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); | |
262 | } | |
263 | ||
264 | /* Note that for some reason, a spurious space is tacked | |
265 | onto the end of the args in some (at least one anyway) | |
266 | implementations, so strip it off if it exists. */ | |
267 | ||
268 | { | |
269 | char *command = elf_tdata (abfd)->core_command; | |
270 | int n = strlen (command); | |
271 | ||
272 | if (0 < n && command[n - 1] == ' ') | |
273 | command[n - 1] = '\0'; | |
274 | } | |
275 | ||
b34976b6 | 276 | return TRUE; |
3bab7989 ML |
277 | } |
278 | \f | |
407443a3 | 279 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 280 | |
407443a3 | 281 | /* The name of the dynamic interpreter. This is put in the .interp |
70256ad8 AJ |
282 | section. */ |
283 | ||
407443a3 | 284 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
70256ad8 | 285 | |
d40d037c AJ |
286 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
287 | copying dynamic variables from a shared lib into an app's dynbss | |
288 | section, and instead use a dynamic relocation to point into the | |
289 | shared lib. */ | |
290 | #define ELIMINATE_COPY_RELOCS 1 | |
291 | ||
70256ad8 AJ |
292 | /* The size in bytes of an entry in the global offset table. */ |
293 | ||
294 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 295 | |
70256ad8 | 296 | /* The size in bytes of an entry in the procedure linkage table. */ |
8d88c4ca | 297 | |
70256ad8 AJ |
298 | #define PLT_ENTRY_SIZE 16 |
299 | ||
300 | /* The first entry in a procedure linkage table looks like this. See the | |
301 | SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */ | |
302 | ||
303 | static const bfd_byte elf64_x86_64_plt0_entry[PLT_ENTRY_SIZE] = | |
304 | { | |
653165cc AJ |
305 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
306 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
307 | 0x90, 0x90, 0x90, 0x90 /* pad out to 16 bytes with nops. */ | |
70256ad8 AJ |
308 | }; |
309 | ||
310 | /* Subsequent entries in a procedure linkage table look like this. */ | |
311 | ||
312 | static const bfd_byte elf64_x86_64_plt_entry[PLT_ENTRY_SIZE] = | |
313 | { | |
653165cc | 314 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 315 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 316 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
317 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
318 | 0xe9, /* jmp relative */ | |
319 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
320 | }; | |
321 | ||
322 | /* The x86-64 linker needs to keep track of the number of relocs that | |
985142a4 | 323 | it decides to copy as dynamic relocs in check_relocs for each symbol. |
c434dee6 AJ |
324 | This is so that it can later discard them if they are found to be |
325 | unnecessary. We store the information in a field extending the | |
326 | regular ELF linker hash table. */ | |
70256ad8 | 327 | |
c434dee6 | 328 | struct elf64_x86_64_dyn_relocs |
70256ad8 AJ |
329 | { |
330 | /* Next section. */ | |
c434dee6 AJ |
331 | struct elf64_x86_64_dyn_relocs *next; |
332 | ||
333 | /* The input section of the reloc. */ | |
334 | asection *sec; | |
335 | ||
336 | /* Total number of relocs copied for the input section. */ | |
70256ad8 | 337 | bfd_size_type count; |
c434dee6 AJ |
338 | |
339 | /* Number of pc-relative relocs copied for the input section. */ | |
340 | bfd_size_type pc_count; | |
70256ad8 AJ |
341 | }; |
342 | ||
343 | /* x86-64 ELF linker hash entry. */ | |
344 | ||
345 | struct elf64_x86_64_link_hash_entry | |
346 | { | |
c434dee6 | 347 | struct elf_link_hash_entry elf; |
70256ad8 | 348 | |
c434dee6 AJ |
349 | /* Track dynamic relocs copied for this symbol. */ |
350 | struct elf64_x86_64_dyn_relocs *dyn_relocs; | |
bffbf940 JJ |
351 | |
352 | #define GOT_UNKNOWN 0 | |
353 | #define GOT_NORMAL 1 | |
354 | #define GOT_TLS_GD 2 | |
355 | #define GOT_TLS_IE 3 | |
356 | unsigned char tls_type; | |
357 | }; | |
358 | ||
359 | #define elf64_x86_64_hash_entry(ent) \ | |
360 | ((struct elf64_x86_64_link_hash_entry *)(ent)) | |
361 | ||
362 | struct elf64_x86_64_obj_tdata | |
363 | { | |
364 | struct elf_obj_tdata root; | |
365 | ||
366 | /* tls_type for each local got entry. */ | |
367 | char *local_got_tls_type; | |
70256ad8 AJ |
368 | }; |
369 | ||
bffbf940 JJ |
370 | #define elf64_x86_64_tdata(abfd) \ |
371 | ((struct elf64_x86_64_obj_tdata *) (abfd)->tdata.any) | |
372 | ||
373 | #define elf64_x86_64_local_got_tls_type(abfd) \ | |
374 | (elf64_x86_64_tdata (abfd)->local_got_tls_type) | |
375 | ||
376 | ||
c434dee6 | 377 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 378 | |
407443a3 AJ |
379 | struct elf64_x86_64_link_hash_table |
380 | { | |
c434dee6 | 381 | struct elf_link_hash_table elf; |
70256ad8 | 382 | |
c434dee6 AJ |
383 | /* Short-cuts to get to dynamic linker sections. */ |
384 | asection *sgot; | |
385 | asection *sgotplt; | |
386 | asection *srelgot; | |
387 | asection *splt; | |
388 | asection *srelplt; | |
389 | asection *sdynbss; | |
390 | asection *srelbss; | |
70256ad8 | 391 | |
bffbf940 JJ |
392 | union { |
393 | bfd_signed_vma refcount; | |
394 | bfd_vma offset; | |
395 | } tls_ld_got; | |
396 | ||
c434dee6 AJ |
397 | /* Small local sym to section mapping cache. */ |
398 | struct sym_sec_cache sym_sec; | |
399 | }; | |
70256ad8 AJ |
400 | |
401 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca NC |
402 | |
403 | #define elf64_x86_64_hash_table(p) \ | |
404 | ((struct elf64_x86_64_link_hash_table *) ((p)->hash)) | |
405 | ||
407443a3 | 406 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
407 | |
408 | static struct bfd_hash_entry * | |
27482721 AJ |
409 | link_hash_newfunc (struct bfd_hash_entry *entry, struct bfd_hash_table *table, |
410 | const char *string) | |
70256ad8 | 411 | { |
70256ad8 | 412 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
413 | subclass. */ |
414 | if (entry == NULL) | |
415 | { | |
416 | entry = bfd_hash_allocate (table, | |
417 | sizeof (struct elf64_x86_64_link_hash_entry)); | |
418 | if (entry == NULL) | |
419 | return entry; | |
420 | } | |
70256ad8 AJ |
421 | |
422 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
423 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
424 | if (entry != NULL) | |
70256ad8 | 425 | { |
c434dee6 AJ |
426 | struct elf64_x86_64_link_hash_entry *eh; |
427 | ||
428 | eh = (struct elf64_x86_64_link_hash_entry *) entry; | |
429 | eh->dyn_relocs = NULL; | |
bffbf940 | 430 | eh->tls_type = GOT_UNKNOWN; |
70256ad8 AJ |
431 | } |
432 | ||
c434dee6 | 433 | return entry; |
70256ad8 AJ |
434 | } |
435 | ||
8d88c4ca NC |
436 | /* Create an X86-64 ELF linker hash table. */ |
437 | ||
438 | static struct bfd_link_hash_table * | |
27482721 | 439 | elf64_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca NC |
440 | { |
441 | struct elf64_x86_64_link_hash_table *ret; | |
dc810e39 | 442 | bfd_size_type amt = sizeof (struct elf64_x86_64_link_hash_table); |
8d88c4ca | 443 | |
e2d34d7d | 444 | ret = (struct elf64_x86_64_link_hash_table *) bfd_malloc (amt); |
c434dee6 | 445 | if (ret == NULL) |
8d88c4ca NC |
446 | return NULL; |
447 | ||
c434dee6 | 448 | if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc)) |
8d88c4ca | 449 | { |
e2d34d7d | 450 | free (ret); |
8d88c4ca NC |
451 | return NULL; |
452 | } | |
453 | ||
c434dee6 AJ |
454 | ret->sgot = NULL; |
455 | ret->sgotplt = NULL; | |
456 | ret->srelgot = NULL; | |
457 | ret->splt = NULL; | |
458 | ret->srelplt = NULL; | |
459 | ret->sdynbss = NULL; | |
460 | ret->srelbss = NULL; | |
461 | ret->sym_sec.abfd = NULL; | |
bffbf940 | 462 | ret->tls_ld_got.refcount = 0; |
c434dee6 AJ |
463 | |
464 | return &ret->elf.root; | |
465 | } | |
466 | ||
467 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
468 | shortcuts to them in our hash table. */ | |
469 | ||
b34976b6 | 470 | static bfd_boolean |
27482721 | 471 | create_got_section (bfd *dynobj, struct bfd_link_info *info) |
c434dee6 AJ |
472 | { |
473 | struct elf64_x86_64_link_hash_table *htab; | |
474 | ||
475 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 476 | return FALSE; |
c434dee6 AJ |
477 | |
478 | htab = elf64_x86_64_hash_table (info); | |
479 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
480 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
481 | if (!htab->sgot || !htab->sgotplt) | |
482 | abort (); | |
483 | ||
3496cb2a L |
484 | htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got", |
485 | (SEC_ALLOC | SEC_LOAD | |
486 | | SEC_HAS_CONTENTS | |
487 | | SEC_IN_MEMORY | |
488 | | SEC_LINKER_CREATED | |
489 | | SEC_READONLY)); | |
c434dee6 | 490 | if (htab->srelgot == NULL |
c434dee6 | 491 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) |
b34976b6 AM |
492 | return FALSE; |
493 | return TRUE; | |
c434dee6 AJ |
494 | } |
495 | ||
496 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
497 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
498 | hash table. */ | |
499 | ||
b34976b6 | 500 | static bfd_boolean |
27482721 | 501 | elf64_x86_64_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
c434dee6 AJ |
502 | { |
503 | struct elf64_x86_64_link_hash_table *htab; | |
504 | ||
505 | htab = elf64_x86_64_hash_table (info); | |
506 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
b34976b6 | 507 | return FALSE; |
c434dee6 AJ |
508 | |
509 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
b34976b6 | 510 | return FALSE; |
c434dee6 AJ |
511 | |
512 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
513 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
514 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
515 | if (!info->shared) | |
516 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
517 | ||
518 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
519 | || (!info->shared && !htab->srelbss)) | |
520 | abort (); | |
521 | ||
b34976b6 | 522 | return TRUE; |
c434dee6 AJ |
523 | } |
524 | ||
525 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
526 | ||
527 | static void | |
9c5bfbb7 | 528 | elf64_x86_64_copy_indirect_symbol (const struct elf_backend_data *bed, |
27482721 AJ |
529 | struct elf_link_hash_entry *dir, |
530 | struct elf_link_hash_entry *ind) | |
c434dee6 AJ |
531 | { |
532 | struct elf64_x86_64_link_hash_entry *edir, *eind; | |
533 | ||
534 | edir = (struct elf64_x86_64_link_hash_entry *) dir; | |
535 | eind = (struct elf64_x86_64_link_hash_entry *) ind; | |
536 | ||
537 | if (eind->dyn_relocs != NULL) | |
538 | { | |
539 | if (edir->dyn_relocs != NULL) | |
540 | { | |
541 | struct elf64_x86_64_dyn_relocs **pp; | |
542 | struct elf64_x86_64_dyn_relocs *p; | |
543 | ||
544 | if (ind->root.type == bfd_link_hash_indirect) | |
545 | abort (); | |
546 | ||
547 | /* Add reloc counts against the weak sym to the strong sym | |
548 | list. Merge any entries against the same section. */ | |
549 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
550 | { | |
551 | struct elf64_x86_64_dyn_relocs *q; | |
552 | ||
553 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
554 | if (q->sec == p->sec) | |
555 | { | |
556 | q->pc_count += p->pc_count; | |
557 | q->count += p->count; | |
558 | *pp = p->next; | |
559 | break; | |
560 | } | |
561 | if (q == NULL) | |
562 | pp = &p->next; | |
563 | } | |
564 | *pp = edir->dyn_relocs; | |
565 | } | |
566 | ||
567 | edir->dyn_relocs = eind->dyn_relocs; | |
568 | eind->dyn_relocs = NULL; | |
569 | } | |
570 | ||
bffbf940 JJ |
571 | if (ind->root.type == bfd_link_hash_indirect |
572 | && dir->got.refcount <= 0) | |
573 | { | |
574 | edir->tls_type = eind->tls_type; | |
575 | eind->tls_type = GOT_UNKNOWN; | |
576 | } | |
577 | ||
d40d037c AJ |
578 | if (ELIMINATE_COPY_RELOCS |
579 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
580 | && dir->dynamic_adjusted) |
581 | { | |
582 | /* If called to transfer flags for a weakdef during processing | |
583 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
584 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
585 | dir->ref_dynamic |= ind->ref_dynamic; | |
586 | dir->ref_regular |= ind->ref_regular; | |
587 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
588 | dir->needs_plt |= ind->needs_plt; | |
589 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
590 | } | |
d40d037c AJ |
591 | else |
592 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); | |
8d88c4ca NC |
593 | } |
594 | ||
b34976b6 | 595 | static bfd_boolean |
27482721 | 596 | elf64_x86_64_mkobject (bfd *abfd) |
8d88c4ca | 597 | { |
bffbf940 JJ |
598 | bfd_size_type amt = sizeof (struct elf64_x86_64_obj_tdata); |
599 | abfd->tdata.any = bfd_zalloc (abfd, amt); | |
600 | if (abfd->tdata.any == NULL) | |
b34976b6 AM |
601 | return FALSE; |
602 | return TRUE; | |
bffbf940 JJ |
603 | } |
604 | ||
b34976b6 | 605 | static bfd_boolean |
27482721 | 606 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 607 | { |
8d88c4ca NC |
608 | /* Set the right machine number for an x86-64 elf64 file. */ |
609 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 610 | return TRUE; |
8d88c4ca NC |
611 | } |
612 | ||
bffbf940 | 613 | static int |
27482721 | 614 | elf64_x86_64_tls_transition (struct bfd_link_info *info, int r_type, int is_local) |
bffbf940 JJ |
615 | { |
616 | if (info->shared) | |
617 | return r_type; | |
618 | ||
619 | switch (r_type) | |
620 | { | |
621 | case R_X86_64_TLSGD: | |
622 | case R_X86_64_GOTTPOFF: | |
623 | if (is_local) | |
624 | return R_X86_64_TPOFF32; | |
625 | return R_X86_64_GOTTPOFF; | |
626 | case R_X86_64_TLSLD: | |
627 | return R_X86_64_TPOFF32; | |
628 | } | |
629 | ||
630 | return r_type; | |
631 | } | |
632 | ||
70256ad8 | 633 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
634 | calculate needed space in the global offset table, procedure |
635 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 636 | |
b34976b6 | 637 | static bfd_boolean |
27482721 AJ |
638 | elf64_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec, |
639 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 640 | { |
c434dee6 | 641 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
642 | Elf_Internal_Shdr *symtab_hdr; |
643 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
644 | const Elf_Internal_Rela *rel; |
645 | const Elf_Internal_Rela *rel_end; | |
70256ad8 AJ |
646 | asection *sreloc; |
647 | ||
1049f94e | 648 | if (info->relocatable) |
b34976b6 | 649 | return TRUE; |
70256ad8 | 650 | |
c434dee6 | 651 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
652 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
653 | sym_hashes = elf_sym_hashes (abfd); | |
70256ad8 | 654 | |
c434dee6 AJ |
655 | sreloc = NULL; |
656 | ||
70256ad8 AJ |
657 | rel_end = relocs + sec->reloc_count; |
658 | for (rel = relocs; rel < rel_end; rel++) | |
659 | { | |
bffbf940 | 660 | unsigned int r_type; |
70256ad8 AJ |
661 | unsigned long r_symndx; |
662 | struct elf_link_hash_entry *h; | |
663 | ||
664 | r_symndx = ELF64_R_SYM (rel->r_info); | |
bffbf940 | 665 | r_type = ELF64_R_TYPE (rel->r_info); |
c434dee6 AJ |
666 | |
667 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
668 | { | |
d003868e AM |
669 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
670 | abfd, r_symndx); | |
b34976b6 | 671 | return FALSE; |
c434dee6 AJ |
672 | } |
673 | ||
70256ad8 AJ |
674 | if (r_symndx < symtab_hdr->sh_info) |
675 | h = NULL; | |
676 | else | |
71cb9464 L |
677 | { |
678 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
679 | while (h->root.type == bfd_link_hash_indirect | |
680 | || h->root.type == bfd_link_hash_warning) | |
681 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
682 | } | |
70256ad8 | 683 | |
bffbf940 JJ |
684 | r_type = elf64_x86_64_tls_transition (info, r_type, h == NULL); |
685 | switch (r_type) | |
70256ad8 | 686 | { |
bffbf940 JJ |
687 | case R_X86_64_TLSLD: |
688 | htab->tls_ld_got.refcount += 1; | |
689 | goto create_got; | |
690 | ||
691 | case R_X86_64_TPOFF32: | |
692 | if (info->shared) | |
70256ad8 | 693 | { |
bffbf940 | 694 | (*_bfd_error_handler) |
d003868e AM |
695 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
696 | abfd, | |
6610a52d L |
697 | x86_64_elf_howto_table[r_type].name, |
698 | (h) ? h->root.root.string : "a local symbol"); | |
bffbf940 | 699 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 700 | return FALSE; |
70256ad8 | 701 | } |
bffbf940 | 702 | break; |
c434dee6 | 703 | |
bffbf940 JJ |
704 | case R_X86_64_GOTTPOFF: |
705 | if (info->shared) | |
706 | info->flags |= DF_STATIC_TLS; | |
707 | /* Fall through */ | |
70256ad8 | 708 | |
bffbf940 JJ |
709 | case R_X86_64_GOT32: |
710 | case R_X86_64_GOTPCREL: | |
711 | case R_X86_64_TLSGD: | |
712 | /* This symbol requires a global offset table entry. */ | |
713 | { | |
714 | int tls_type, old_tls_type; | |
715 | ||
716 | switch (r_type) | |
717 | { | |
718 | default: tls_type = GOT_NORMAL; break; | |
719 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
720 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
721 | } | |
722 | ||
723 | if (h != NULL) | |
724 | { | |
725 | h->got.refcount += 1; | |
726 | old_tls_type = elf64_x86_64_hash_entry (h)->tls_type; | |
727 | } | |
728 | else | |
729 | { | |
730 | bfd_signed_vma *local_got_refcounts; | |
731 | ||
732 | /* This is a global offset table entry for a local symbol. */ | |
733 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
734 | if (local_got_refcounts == NULL) | |
735 | { | |
736 | bfd_size_type size; | |
737 | ||
738 | size = symtab_hdr->sh_info; | |
739 | size *= sizeof (bfd_signed_vma) + sizeof (char); | |
740 | local_got_refcounts = ((bfd_signed_vma *) | |
741 | bfd_zalloc (abfd, size)); | |
742 | if (local_got_refcounts == NULL) | |
b34976b6 | 743 | return FALSE; |
bffbf940 JJ |
744 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
745 | elf64_x86_64_local_got_tls_type (abfd) | |
746 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); | |
747 | } | |
748 | local_got_refcounts[r_symndx] += 1; | |
749 | old_tls_type | |
750 | = elf64_x86_64_local_got_tls_type (abfd) [r_symndx]; | |
751 | } | |
752 | ||
753 | /* If a TLS symbol is accessed using IE at least once, | |
754 | there is no point to use dynamic model for it. */ | |
755 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
756 | && (old_tls_type != GOT_TLS_GD || tls_type != GOT_TLS_IE)) | |
757 | { | |
758 | if (old_tls_type == GOT_TLS_IE && tls_type == GOT_TLS_GD) | |
759 | tls_type = old_tls_type; | |
760 | else | |
761 | { | |
762 | (*_bfd_error_handler) | |
d003868e AM |
763 | (_("%B: %s' accessed both as normal and thread local symbol"), |
764 | abfd, h ? h->root.root.string : "<local>"); | |
b34976b6 | 765 | return FALSE; |
bffbf940 JJ |
766 | } |
767 | } | |
768 | ||
769 | if (old_tls_type != tls_type) | |
770 | { | |
771 | if (h != NULL) | |
772 | elf64_x86_64_hash_entry (h)->tls_type = tls_type; | |
773 | else | |
774 | elf64_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
775 | } | |
776 | } | |
c434dee6 AJ |
777 | /* Fall through */ |
778 | ||
d6ab8113 JB |
779 | case R_X86_64_GOTOFF64: |
780 | case R_X86_64_GOTPC32: | |
bffbf940 | 781 | create_got: |
c434dee6 AJ |
782 | if (htab->sgot == NULL) |
783 | { | |
784 | if (htab->elf.dynobj == NULL) | |
785 | htab->elf.dynobj = abfd; | |
786 | if (!create_got_section (htab->elf.dynobj, info)) | |
b34976b6 | 787 | return FALSE; |
c434dee6 | 788 | } |
70256ad8 AJ |
789 | break; |
790 | ||
791 | case R_X86_64_PLT32: | |
792 | /* This symbol requires a procedure linkage table entry. We | |
407443a3 AJ |
793 | actually build the entry in adjust_dynamic_symbol, |
794 | because this might be a case of linking PIC code which is | |
795 | never referenced by a dynamic object, in which case we | |
796 | don't need to generate a procedure linkage table entry | |
797 | after all. */ | |
70256ad8 AJ |
798 | |
799 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 800 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
801 | if (h == NULL) |
802 | continue; | |
803 | ||
f5385ebf | 804 | h->needs_plt = 1; |
51b64d56 | 805 | h->plt.refcount += 1; |
70256ad8 AJ |
806 | break; |
807 | ||
cc78d0af AJ |
808 | case R_X86_64_8: |
809 | case R_X86_64_16: | |
70256ad8 AJ |
810 | case R_X86_64_32: |
811 | case R_X86_64_32S: | |
1b71fb54 AJ |
812 | /* Let's help debug shared library creation. These relocs |
813 | cannot be used in shared libs. Don't error out for | |
814 | sections we don't care about, such as debug sections or | |
815 | non-constant sections. */ | |
816 | if (info->shared | |
817 | && (sec->flags & SEC_ALLOC) != 0 | |
818 | && (sec->flags & SEC_READONLY) != 0) | |
819 | { | |
820 | (*_bfd_error_handler) | |
d003868e AM |
821 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
822 | abfd, | |
6610a52d L |
823 | x86_64_elf_howto_table[r_type].name, |
824 | (h) ? h->root.root.string : "a local symbol"); | |
1b71fb54 | 825 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 826 | return FALSE; |
1b71fb54 AJ |
827 | } |
828 | /* Fall through. */ | |
829 | ||
c434dee6 AJ |
830 | case R_X86_64_PC8: |
831 | case R_X86_64_PC16: | |
70256ad8 | 832 | case R_X86_64_PC32: |
d6ab8113 | 833 | case R_X86_64_PC64: |
1b71fb54 | 834 | case R_X86_64_64: |
c434dee6 AJ |
835 | if (h != NULL && !info->shared) |
836 | { | |
837 | /* If this reloc is in a read-only section, we might | |
838 | need a copy reloc. We can't check reliably at this | |
839 | stage whether the section is read-only, as input | |
840 | sections have not yet been mapped to output sections. | |
841 | Tentatively set the flag for now, and correct in | |
842 | adjust_dynamic_symbol. */ | |
f5385ebf | 843 | h->non_got_ref = 1; |
c434dee6 AJ |
844 | |
845 | /* We may need a .plt entry if the function this reloc | |
846 | refers to is in a shared lib. */ | |
847 | h->plt.refcount += 1; | |
d6ab8113 | 848 | if (r_type != R_X86_64_PC32 && r_type != R_X86_64_PC64) |
f5385ebf | 849 | h->pointer_equality_needed = 1; |
c434dee6 | 850 | } |
70256ad8 AJ |
851 | |
852 | /* If we are creating a shared library, and this is a reloc | |
853 | against a global symbol, or a non PC relative reloc | |
854 | against a local symbol, then we need to copy the reloc | |
855 | into the shared library. However, if we are linking with | |
856 | -Bsymbolic, we do not need to copy a reloc against a | |
857 | global symbol which is defined in an object we are | |
407443a3 | 858 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
859 | this point we have not seen all the input files, so it is |
860 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
861 | later (it is never cleared). In case of a weak definition, |
862 | DEF_REGULAR may be cleared later by a strong definition in | |
863 | a shared library. We account for that possibility below by | |
864 | storing information in the relocs_copied field of the hash | |
865 | table entry. A similar situation occurs when creating | |
866 | shared libraries and symbol visibility changes render the | |
867 | symbol local. | |
868 | ||
869 | If on the other hand, we are creating an executable, we | |
870 | may need to keep relocations for symbols satisfied by a | |
871 | dynamic library if we manage to avoid copy relocs for the | |
872 | symbol. */ | |
873 | if ((info->shared | |
874 | && (sec->flags & SEC_ALLOC) != 0 | |
bffbf940 JJ |
875 | && (((r_type != R_X86_64_PC8) |
876 | && (r_type != R_X86_64_PC16) | |
d6ab8113 JB |
877 | && (r_type != R_X86_64_PC32) |
878 | && (r_type != R_X86_64_PC64)) | |
c434dee6 AJ |
879 | || (h != NULL |
880 | && (! info->symbolic | |
881 | || h->root.type == bfd_link_hash_defweak | |
f5385ebf | 882 | || !h->def_regular)))) |
d40d037c AJ |
883 | || (ELIMINATE_COPY_RELOCS |
884 | && !info->shared | |
c434dee6 AJ |
885 | && (sec->flags & SEC_ALLOC) != 0 |
886 | && h != NULL | |
887 | && (h->root.type == bfd_link_hash_defweak | |
f5385ebf | 888 | || !h->def_regular))) |
70256ad8 | 889 | { |
c434dee6 AJ |
890 | struct elf64_x86_64_dyn_relocs *p; |
891 | struct elf64_x86_64_dyn_relocs **head; | |
892 | ||
893 | /* We must copy these reloc types into the output file. | |
894 | Create a reloc section in dynobj and make room for | |
895 | this reloc. */ | |
70256ad8 AJ |
896 | if (sreloc == NULL) |
897 | { | |
898 | const char *name; | |
c434dee6 | 899 | bfd *dynobj; |
70256ad8 AJ |
900 | |
901 | name = (bfd_elf_string_from_elf_section | |
902 | (abfd, | |
903 | elf_elfheader (abfd)->e_shstrndx, | |
904 | elf_section_data (sec)->rel_hdr.sh_name)); | |
905 | if (name == NULL) | |
b34976b6 | 906 | return FALSE; |
70256ad8 | 907 | |
c434dee6 AJ |
908 | if (strncmp (name, ".rela", 5) != 0 |
909 | || strcmp (bfd_get_section_name (abfd, sec), | |
910 | name + 5) != 0) | |
911 | { | |
912 | (*_bfd_error_handler) | |
d003868e AM |
913 | (_("%B: bad relocation section name `%s\'"), |
914 | abfd, name); | |
c434dee6 AJ |
915 | } |
916 | ||
917 | if (htab->elf.dynobj == NULL) | |
918 | htab->elf.dynobj = abfd; | |
919 | ||
920 | dynobj = htab->elf.dynobj; | |
70256ad8 AJ |
921 | |
922 | sreloc = bfd_get_section_by_name (dynobj, name); | |
923 | if (sreloc == NULL) | |
924 | { | |
925 | flagword flags; | |
926 | ||
70256ad8 AJ |
927 | flags = (SEC_HAS_CONTENTS | SEC_READONLY |
928 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
929 | if ((sec->flags & SEC_ALLOC) != 0) | |
930 | flags |= SEC_ALLOC | SEC_LOAD; | |
3496cb2a L |
931 | sreloc = bfd_make_section_with_flags (dynobj, |
932 | name, | |
933 | flags); | |
70256ad8 | 934 | if (sreloc == NULL |
cc78d0af | 935 | || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
b34976b6 | 936 | return FALSE; |
70256ad8 | 937 | } |
c434dee6 | 938 | elf_section_data (sec)->sreloc = sreloc; |
70256ad8 AJ |
939 | } |
940 | ||
c434dee6 AJ |
941 | /* If this is a global symbol, we count the number of |
942 | relocations we need for this symbol. */ | |
943 | if (h != NULL) | |
70256ad8 | 944 | { |
c434dee6 AJ |
945 | head = &((struct elf64_x86_64_link_hash_entry *) h)->dyn_relocs; |
946 | } | |
947 | else | |
948 | { | |
949 | /* Track dynamic relocs needed for local syms too. | |
950 | We really need local syms available to do this | |
951 | easily. Oh well. */ | |
952 | ||
953 | asection *s; | |
954 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
955 | sec, r_symndx); | |
956 | if (s == NULL) | |
b34976b6 | 957 | return FALSE; |
70256ad8 | 958 | |
c434dee6 AJ |
959 | head = ((struct elf64_x86_64_dyn_relocs **) |
960 | &elf_section_data (s)->local_dynrel); | |
961 | } | |
70256ad8 | 962 | |
c434dee6 AJ |
963 | p = *head; |
964 | if (p == NULL || p->sec != sec) | |
965 | { | |
966 | bfd_size_type amt = sizeof *p; | |
967 | p = ((struct elf64_x86_64_dyn_relocs *) | |
968 | bfd_alloc (htab->elf.dynobj, amt)); | |
70256ad8 | 969 | if (p == NULL) |
b34976b6 | 970 | return FALSE; |
c434dee6 AJ |
971 | p->next = *head; |
972 | *head = p; | |
973 | p->sec = sec; | |
974 | p->count = 0; | |
975 | p->pc_count = 0; | |
70256ad8 | 976 | } |
c434dee6 AJ |
977 | |
978 | p->count += 1; | |
bffbf940 JJ |
979 | if (r_type == R_X86_64_PC8 |
980 | || r_type == R_X86_64_PC16 | |
d6ab8113 JB |
981 | || r_type == R_X86_64_PC32 |
982 | || r_type == R_X86_64_PC64) | |
c434dee6 | 983 | p->pc_count += 1; |
70256ad8 AJ |
984 | } |
985 | break; | |
fe4770f4 AJ |
986 | |
987 | /* This relocation describes the C++ object vtable hierarchy. | |
988 | Reconstruct it for later use during GC. */ | |
989 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 990 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 991 | return FALSE; |
fe4770f4 AJ |
992 | break; |
993 | ||
994 | /* This relocation describes which C++ vtable entries are actually | |
995 | used. Record for later use during GC. */ | |
996 | case R_X86_64_GNU_VTENTRY: | |
c152c796 | 997 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
b34976b6 | 998 | return FALSE; |
fe4770f4 | 999 | break; |
c434dee6 AJ |
1000 | |
1001 | default: | |
1002 | break; | |
70256ad8 AJ |
1003 | } |
1004 | } | |
1005 | ||
b34976b6 | 1006 | return TRUE; |
70256ad8 AJ |
1007 | } |
1008 | ||
1009 | /* Return the section that should be marked against GC for a given | |
407443a3 | 1010 | relocation. */ |
70256ad8 AJ |
1011 | |
1012 | static asection * | |
27482721 AJ |
1013 | elf64_x86_64_gc_mark_hook (asection *sec, |
1014 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
1015 | Elf_Internal_Rela *rel, | |
1016 | struct elf_link_hash_entry *h, | |
1017 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
1018 | { |
1019 | if (h != NULL) | |
1020 | { | |
fe4770f4 | 1021 | switch (ELF64_R_TYPE (rel->r_info)) |
70256ad8 | 1022 | { |
fe4770f4 AJ |
1023 | case R_X86_64_GNU_VTINHERIT: |
1024 | case R_X86_64_GNU_VTENTRY: | |
1025 | break; | |
70256ad8 AJ |
1026 | |
1027 | default: | |
fe4770f4 AJ |
1028 | switch (h->root.type) |
1029 | { | |
1030 | case bfd_link_hash_defined: | |
1031 | case bfd_link_hash_defweak: | |
1032 | return h->root.u.def.section; | |
1033 | ||
1034 | case bfd_link_hash_common: | |
1035 | return h->root.u.c.p->section; | |
1036 | ||
1037 | default: | |
1038 | break; | |
1039 | } | |
70256ad8 AJ |
1040 | } |
1041 | } | |
1042 | else | |
1e2f5b6e | 1043 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
70256ad8 AJ |
1044 | |
1045 | return NULL; | |
1046 | } | |
1047 | ||
407443a3 | 1048 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 | 1049 | |
b34976b6 | 1050 | static bfd_boolean |
27482721 AJ |
1051 | elf64_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, |
1052 | asection *sec, const Elf_Internal_Rela *relocs) | |
70256ad8 AJ |
1053 | { |
1054 | Elf_Internal_Shdr *symtab_hdr; | |
1055 | struct elf_link_hash_entry **sym_hashes; | |
1056 | bfd_signed_vma *local_got_refcounts; | |
1057 | const Elf_Internal_Rela *rel, *relend; | |
c434dee6 AJ |
1058 | |
1059 | elf_section_data (sec)->local_dynrel = NULL; | |
70256ad8 AJ |
1060 | |
1061 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1062 | sym_hashes = elf_sym_hashes (abfd); | |
1063 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1064 | ||
70256ad8 AJ |
1065 | relend = relocs + sec->reloc_count; |
1066 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
1067 | { |
1068 | unsigned long r_symndx; | |
1069 | unsigned int r_type; | |
1070 | struct elf_link_hash_entry *h = NULL; | |
70256ad8 | 1071 | |
26e41594 AM |
1072 | r_symndx = ELF64_R_SYM (rel->r_info); |
1073 | if (r_symndx >= symtab_hdr->sh_info) | |
1074 | { | |
1075 | struct elf64_x86_64_link_hash_entry *eh; | |
1076 | struct elf64_x86_64_dyn_relocs **pp; | |
1077 | struct elf64_x86_64_dyn_relocs *p; | |
c434dee6 | 1078 | |
26e41594 | 1079 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1080 | while (h->root.type == bfd_link_hash_indirect |
1081 | || h->root.type == bfd_link_hash_warning) | |
1082 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1083 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
c434dee6 | 1084 | |
26e41594 AM |
1085 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1086 | if (p->sec == sec) | |
1087 | { | |
1088 | /* Everything must go for SEC. */ | |
1089 | *pp = p->next; | |
1090 | break; | |
1091 | } | |
1092 | } | |
c434dee6 | 1093 | |
26e41594 AM |
1094 | r_type = ELF64_R_TYPE (rel->r_info); |
1095 | r_type = elf64_x86_64_tls_transition (info, r_type, h != NULL); | |
1096 | switch (r_type) | |
1097 | { | |
1098 | case R_X86_64_TLSLD: | |
1099 | if (elf64_x86_64_hash_table (info)->tls_ld_got.refcount > 0) | |
1100 | elf64_x86_64_hash_table (info)->tls_ld_got.refcount -= 1; | |
1101 | break; | |
c434dee6 | 1102 | |
26e41594 AM |
1103 | case R_X86_64_TLSGD: |
1104 | case R_X86_64_GOTTPOFF: | |
1105 | case R_X86_64_GOT32: | |
1106 | case R_X86_64_GOTPCREL: | |
1107 | if (h != NULL) | |
1108 | { | |
1109 | if (h->got.refcount > 0) | |
1110 | h->got.refcount -= 1; | |
1111 | } | |
1112 | else if (local_got_refcounts != NULL) | |
1113 | { | |
1114 | if (local_got_refcounts[r_symndx] > 0) | |
1115 | local_got_refcounts[r_symndx] -= 1; | |
1116 | } | |
1117 | break; | |
c434dee6 | 1118 | |
26e41594 AM |
1119 | case R_X86_64_8: |
1120 | case R_X86_64_16: | |
1121 | case R_X86_64_32: | |
1122 | case R_X86_64_64: | |
1123 | case R_X86_64_32S: | |
1124 | case R_X86_64_PC8: | |
1125 | case R_X86_64_PC16: | |
1126 | case R_X86_64_PC32: | |
d6ab8113 | 1127 | case R_X86_64_PC64: |
26e41594 AM |
1128 | if (info->shared) |
1129 | break; | |
1130 | /* Fall thru */ | |
c434dee6 | 1131 | |
26e41594 AM |
1132 | case R_X86_64_PLT32: |
1133 | if (h != NULL) | |
1134 | { | |
1135 | if (h->plt.refcount > 0) | |
1136 | h->plt.refcount -= 1; | |
1137 | } | |
1138 | break; | |
70256ad8 | 1139 | |
26e41594 AM |
1140 | default: |
1141 | break; | |
1142 | } | |
1143 | } | |
70256ad8 | 1144 | |
b34976b6 | 1145 | return TRUE; |
70256ad8 AJ |
1146 | } |
1147 | ||
1148 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1149 | regular object. The current definition is in some section of the | |
1150 | dynamic object, but we're not including those sections. We have to | |
1151 | change the definition to something the rest of the link can | |
407443a3 | 1152 | understand. */ |
70256ad8 | 1153 | |
b34976b6 | 1154 | static bfd_boolean |
27482721 AJ |
1155 | elf64_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
1156 | struct elf_link_hash_entry *h) | |
70256ad8 | 1157 | { |
c434dee6 | 1158 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1159 | asection *s; |
1160 | unsigned int power_of_two; | |
1161 | ||
70256ad8 AJ |
1162 | /* If this is a function, put it in the procedure linkage table. We |
1163 | will fill in the contents of the procedure linkage table later, | |
1164 | when we know the address of the .got section. */ | |
1165 | if (h->type == STT_FUNC | |
f5385ebf | 1166 | || h->needs_plt) |
70256ad8 | 1167 | { |
c434dee6 | 1168 | if (h->plt.refcount <= 0 |
27482721 AJ |
1169 | || SYMBOL_CALLS_LOCAL (info, h) |
1170 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1171 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 1172 | { |
70256ad8 AJ |
1173 | /* This case can occur if we saw a PLT32 reloc in an input |
1174 | file, but the symbol was never referred to by a dynamic | |
1175 | object, or if all references were garbage collected. In | |
1176 | such a case, we don't actually need to build a procedure | |
1177 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 1178 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 1179 | h->needs_plt = 0; |
70256ad8 AJ |
1180 | } |
1181 | ||
b34976b6 | 1182 | return TRUE; |
70256ad8 | 1183 | } |
bbd7ec4a | 1184 | else |
c434dee6 AJ |
1185 | /* It's possible that we incorrectly decided a .plt reloc was |
1186 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
1187 | check_relocs. We can't decide accurately between function and | |
1188 | non-function syms in check-relocs; Objects loaded later in | |
1189 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1190 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
1191 | |
1192 | /* If this is a weak symbol, and there is a real definition, the | |
1193 | processor independent code will have arranged for us to see the | |
407443a3 | 1194 | real definition first, and we can just use the same value. */ |
f6e332e6 | 1195 | if (h->u.weakdef != NULL) |
70256ad8 | 1196 | { |
f6e332e6 AM |
1197 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1198 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1199 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1200 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 1201 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 1202 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 1203 | return TRUE; |
70256ad8 AJ |
1204 | } |
1205 | ||
1206 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 1207 | is not a function. */ |
70256ad8 AJ |
1208 | |
1209 | /* If we are creating a shared library, we must presume that the | |
1210 | only references to the symbol are via the global offset table. | |
1211 | For such cases we need not do anything here; the relocations will | |
407443a3 | 1212 | be handled correctly by relocate_section. */ |
70256ad8 | 1213 | if (info->shared) |
b34976b6 | 1214 | return TRUE; |
70256ad8 AJ |
1215 | |
1216 | /* If there are no references to this symbol that do not use the | |
1217 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 1218 | if (!h->non_got_ref) |
b34976b6 | 1219 | return TRUE; |
70256ad8 | 1220 | |
c434dee6 AJ |
1221 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1222 | if (info->nocopyreloc) | |
1223 | { | |
f5385ebf | 1224 | h->non_got_ref = 0; |
b34976b6 | 1225 | return TRUE; |
c434dee6 AJ |
1226 | } |
1227 | ||
d40d037c | 1228 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 1229 | { |
d40d037c AJ |
1230 | struct elf64_x86_64_link_hash_entry * eh; |
1231 | struct elf64_x86_64_dyn_relocs *p; | |
c434dee6 | 1232 | |
d40d037c AJ |
1233 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
1234 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1235 | { | |
1236 | s = p->sec->output_section; | |
1237 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1238 | break; | |
1239 | } | |
1240 | ||
1241 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1242 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1243 | if (p == NULL) | |
1244 | { | |
f5385ebf | 1245 | h->non_got_ref = 0; |
d40d037c AJ |
1246 | return TRUE; |
1247 | } | |
c434dee6 AJ |
1248 | } |
1249 | ||
70256ad8 | 1250 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 1251 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
1252 | an entry for this symbol in the .dynsym section. The dynamic |
1253 | object will contain position independent code, so all references | |
1254 | from the dynamic object to this symbol will go through the global | |
1255 | offset table. The dynamic linker will use the .dynsym entry to | |
1256 | determine the address it must put in the global offset table, so | |
1257 | both the dynamic object and the regular object will refer to the | |
1258 | same memory location for the variable. */ | |
1259 | ||
c434dee6 | 1260 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
1261 | |
1262 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
1263 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 1264 | runtime process image. */ |
70256ad8 AJ |
1265 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1266 | { | |
eea6121a | 1267 | htab->srelbss->size += sizeof (Elf64_External_Rela); |
f5385ebf | 1268 | h->needs_copy = 1; |
70256ad8 AJ |
1269 | } |
1270 | ||
1271 | /* We need to figure out the alignment required for this symbol. I | |
407443a3 | 1272 | have no idea how ELF linkers handle this. 16-bytes is the size |
70256ad8 AJ |
1273 | of the largest type that requires hard alignment -- long double. */ |
1274 | /* FIXME: This is VERY ugly. Should be fixed for all architectures using | |
1275 | this construct. */ | |
1276 | power_of_two = bfd_log2 (h->size); | |
1277 | if (power_of_two > 4) | |
1278 | power_of_two = 4; | |
1279 | ||
1280 | /* Apply the required alignment. */ | |
c434dee6 | 1281 | s = htab->sdynbss; |
eea6121a | 1282 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); |
c434dee6 | 1283 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) |
70256ad8 | 1284 | { |
c434dee6 | 1285 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
b34976b6 | 1286 | return FALSE; |
70256ad8 AJ |
1287 | } |
1288 | ||
1289 | /* Define the symbol as being at this point in the section. */ | |
1290 | h->root.u.def.section = s; | |
eea6121a | 1291 | h->root.u.def.value = s->size; |
70256ad8 AJ |
1292 | |
1293 | /* Increment the section size to make room for the symbol. */ | |
eea6121a | 1294 | s->size += h->size; |
70256ad8 | 1295 | |
b34976b6 | 1296 | return TRUE; |
70256ad8 AJ |
1297 | } |
1298 | ||
c434dee6 AJ |
1299 | /* Allocate space in .plt, .got and associated reloc sections for |
1300 | dynamic relocs. */ | |
1301 | ||
b34976b6 | 1302 | static bfd_boolean |
27482721 | 1303 | allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
1304 | { |
1305 | struct bfd_link_info *info; | |
1306 | struct elf64_x86_64_link_hash_table *htab; | |
1307 | struct elf64_x86_64_link_hash_entry *eh; | |
1308 | struct elf64_x86_64_dyn_relocs *p; | |
1309 | ||
e92d460e | 1310 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1311 | return TRUE; |
c434dee6 | 1312 | |
e92d460e AM |
1313 | if (h->root.type == bfd_link_hash_warning) |
1314 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1315 | ||
c434dee6 AJ |
1316 | info = (struct bfd_link_info *) inf; |
1317 | htab = elf64_x86_64_hash_table (info); | |
1318 | ||
1319 | if (htab->elf.dynamic_sections_created | |
27482721 | 1320 | && h->plt.refcount > 0) |
c434dee6 AJ |
1321 | { |
1322 | /* Make sure this symbol is output as a dynamic symbol. | |
1323 | Undefined weak syms won't yet be marked as dynamic. */ | |
1324 | if (h->dynindx == -1 | |
f5385ebf | 1325 | && !h->forced_local) |
c434dee6 | 1326 | { |
c152c796 | 1327 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1328 | return FALSE; |
c434dee6 AJ |
1329 | } |
1330 | ||
27482721 AJ |
1331 | if (info->shared |
1332 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
c434dee6 AJ |
1333 | { |
1334 | asection *s = htab->splt; | |
1335 | ||
1336 | /* If this is the first .plt entry, make room for the special | |
1337 | first entry. */ | |
eea6121a AM |
1338 | if (s->size == 0) |
1339 | s->size += PLT_ENTRY_SIZE; | |
c434dee6 | 1340 | |
eea6121a | 1341 | h->plt.offset = s->size; |
c434dee6 AJ |
1342 | |
1343 | /* If this symbol is not defined in a regular file, and we are | |
1344 | not generating a shared library, then set the symbol to this | |
1345 | location in the .plt. This is required to make function | |
1346 | pointers compare as equal between the normal executable and | |
1347 | the shared library. */ | |
1348 | if (! info->shared | |
f5385ebf | 1349 | && !h->def_regular) |
c434dee6 AJ |
1350 | { |
1351 | h->root.u.def.section = s; | |
1352 | h->root.u.def.value = h->plt.offset; | |
1353 | } | |
1354 | ||
1355 | /* Make room for this entry. */ | |
eea6121a | 1356 | s->size += PLT_ENTRY_SIZE; |
c434dee6 AJ |
1357 | |
1358 | /* We also need to make an entry in the .got.plt section, which | |
1359 | will be placed in the .got section by the linker script. */ | |
eea6121a | 1360 | htab->sgotplt->size += GOT_ENTRY_SIZE; |
c434dee6 AJ |
1361 | |
1362 | /* We also need to make an entry in the .rela.plt section. */ | |
eea6121a | 1363 | htab->srelplt->size += sizeof (Elf64_External_Rela); |
c434dee6 AJ |
1364 | } |
1365 | else | |
1366 | { | |
1367 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1368 | h->needs_plt = 0; |
c434dee6 AJ |
1369 | } |
1370 | } | |
1371 | else | |
1372 | { | |
1373 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1374 | h->needs_plt = 0; |
c434dee6 AJ |
1375 | } |
1376 | ||
bffbf940 JJ |
1377 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
1378 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
1379 | if (h->got.refcount > 0 | |
1380 | && !info->shared | |
1381 | && h->dynindx == -1 | |
1382 | && elf64_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) | |
1383 | h->got.offset = (bfd_vma) -1; | |
1384 | else if (h->got.refcount > 0) | |
c434dee6 AJ |
1385 | { |
1386 | asection *s; | |
b34976b6 | 1387 | bfd_boolean dyn; |
bffbf940 | 1388 | int tls_type = elf64_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
1389 | |
1390 | /* Make sure this symbol is output as a dynamic symbol. | |
1391 | Undefined weak syms won't yet be marked as dynamic. */ | |
1392 | if (h->dynindx == -1 | |
f5385ebf | 1393 | && !h->forced_local) |
c434dee6 | 1394 | { |
c152c796 | 1395 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1396 | return FALSE; |
c434dee6 AJ |
1397 | } |
1398 | ||
1399 | s = htab->sgot; | |
eea6121a AM |
1400 | h->got.offset = s->size; |
1401 | s->size += GOT_ENTRY_SIZE; | |
bffbf940 JJ |
1402 | /* R_X86_64_TLSGD needs 2 consecutive GOT slots. */ |
1403 | if (tls_type == GOT_TLS_GD) | |
eea6121a | 1404 | s->size += GOT_ENTRY_SIZE; |
c434dee6 | 1405 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 JJ |
1406 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
1407 | and two if global. | |
1408 | R_X86_64_GOTTPOFF needs one dynamic relocation. */ | |
1409 | if ((tls_type == GOT_TLS_GD && h->dynindx == -1) | |
1410 | || tls_type == GOT_TLS_IE) | |
eea6121a | 1411 | htab->srelgot->size += sizeof (Elf64_External_Rela); |
bffbf940 | 1412 | else if (tls_type == GOT_TLS_GD) |
eea6121a | 1413 | htab->srelgot->size += 2 * sizeof (Elf64_External_Rela); |
4bc6e03a AJ |
1414 | else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
1415 | || h->root.type != bfd_link_hash_undefweak) | |
27482721 AJ |
1416 | && (info->shared |
1417 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
eea6121a | 1418 | htab->srelgot->size += sizeof (Elf64_External_Rela); |
c434dee6 AJ |
1419 | } |
1420 | else | |
1421 | h->got.offset = (bfd_vma) -1; | |
1422 | ||
1423 | eh = (struct elf64_x86_64_link_hash_entry *) h; | |
1424 | if (eh->dyn_relocs == NULL) | |
b34976b6 | 1425 | return TRUE; |
c434dee6 AJ |
1426 | |
1427 | /* In the shared -Bsymbolic case, discard space allocated for | |
1428 | dynamic pc-relative relocs against symbols which turn out to be | |
1429 | defined in regular objects. For the normal shared case, discard | |
1430 | space for pc-relative relocs that have become local due to symbol | |
1431 | visibility changes. */ | |
1432 | ||
1433 | if (info->shared) | |
1434 | { | |
27482721 AJ |
1435 | /* Relocs that use pc_count are those that appear on a call |
1436 | insn, or certain REL relocs that can generated via assembly. | |
1437 | We want calls to protected symbols to resolve directly to the | |
1438 | function rather than going via the plt. If people want | |
1439 | function pointer comparisons to work as expected then they | |
1440 | should avoid writing weird assembly. */ | |
1441 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 AJ |
1442 | { |
1443 | struct elf64_x86_64_dyn_relocs **pp; | |
1444 | ||
1445 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1446 | { | |
1447 | p->count -= p->pc_count; | |
1448 | p->pc_count = 0; | |
1449 | if (p->count == 0) | |
1450 | *pp = p->next; | |
1451 | else | |
1452 | pp = &p->next; | |
1453 | } | |
1454 | } | |
4e795f50 AM |
1455 | |
1456 | /* Also discard relocs on undefined weak syms with non-default | |
1457 | visibility. */ | |
1458 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1459 | && h->root.type == bfd_link_hash_undefweak) | |
1460 | eh->dyn_relocs = NULL; | |
c434dee6 | 1461 | } |
d40d037c | 1462 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
1463 | { |
1464 | /* For the non-shared case, discard space for relocs against | |
1465 | symbols which turn out to need copy relocs or are not | |
1466 | dynamic. */ | |
1467 | ||
f5385ebf AM |
1468 | if (!h->non_got_ref |
1469 | && ((h->def_dynamic | |
1470 | && !h->def_regular) | |
c434dee6 AJ |
1471 | || (htab->elf.dynamic_sections_created |
1472 | && (h->root.type == bfd_link_hash_undefweak | |
1473 | || h->root.type == bfd_link_hash_undefined)))) | |
1474 | { | |
1475 | /* Make sure this symbol is output as a dynamic symbol. | |
1476 | Undefined weak syms won't yet be marked as dynamic. */ | |
1477 | if (h->dynindx == -1 | |
f5385ebf | 1478 | && !h->forced_local) |
c434dee6 | 1479 | { |
c152c796 | 1480 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1481 | return FALSE; |
c434dee6 AJ |
1482 | } |
1483 | ||
1484 | /* If that succeeded, we know we'll be keeping all the | |
1485 | relocs. */ | |
1486 | if (h->dynindx != -1) | |
1487 | goto keep; | |
1488 | } | |
1489 | ||
1490 | eh->dyn_relocs = NULL; | |
1491 | ||
1492 | keep: ; | |
1493 | } | |
1494 | ||
1495 | /* Finally, allocate space. */ | |
1496 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1497 | { | |
1498 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
eea6121a | 1499 | sreloc->size += p->count * sizeof (Elf64_External_Rela); |
c434dee6 AJ |
1500 | } |
1501 | ||
b34976b6 | 1502 | return TRUE; |
c434dee6 AJ |
1503 | } |
1504 | ||
1505 | /* Find any dynamic relocs that apply to read-only sections. */ | |
1506 | ||
b34976b6 | 1507 | static bfd_boolean |
27482721 | 1508 | readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
1509 | { |
1510 | struct elf64_x86_64_link_hash_entry *eh; | |
1511 | struct elf64_x86_64_dyn_relocs *p; | |
1512 | ||
e92d460e AM |
1513 | if (h->root.type == bfd_link_hash_warning) |
1514 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1515 | ||
c434dee6 AJ |
1516 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
1517 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1518 | { | |
1519 | asection *s = p->sec->output_section; | |
1520 | ||
1521 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1522 | { | |
1523 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1524 | ||
1525 | info->flags |= DF_TEXTREL; | |
1526 | ||
1527 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 1528 | return FALSE; |
c434dee6 AJ |
1529 | } |
1530 | } | |
b34976b6 | 1531 | return TRUE; |
c434dee6 AJ |
1532 | } |
1533 | ||
70256ad8 AJ |
1534 | /* Set the sizes of the dynamic sections. */ |
1535 | ||
b34976b6 | 1536 | static bfd_boolean |
27482721 AJ |
1537 | elf64_x86_64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
1538 | struct bfd_link_info *info) | |
70256ad8 | 1539 | { |
c434dee6 | 1540 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1541 | bfd *dynobj; |
1542 | asection *s; | |
b34976b6 | 1543 | bfd_boolean relocs; |
c434dee6 | 1544 | bfd *ibfd; |
70256ad8 | 1545 | |
c434dee6 AJ |
1546 | htab = elf64_x86_64_hash_table (info); |
1547 | dynobj = htab->elf.dynobj; | |
1548 | if (dynobj == NULL) | |
1549 | abort (); | |
70256ad8 | 1550 | |
c434dee6 | 1551 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
1552 | { |
1553 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 1554 | if (info->executable) |
70256ad8 AJ |
1555 | { |
1556 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
c434dee6 AJ |
1557 | if (s == NULL) |
1558 | abort (); | |
eea6121a | 1559 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
70256ad8 AJ |
1560 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1561 | } | |
1562 | } | |
70256ad8 | 1563 | |
c434dee6 AJ |
1564 | /* Set up .got offsets for local syms, and space for local dynamic |
1565 | relocs. */ | |
1566 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
70256ad8 | 1567 | { |
c434dee6 AJ |
1568 | bfd_signed_vma *local_got; |
1569 | bfd_signed_vma *end_local_got; | |
bffbf940 | 1570 | char *local_tls_type; |
c434dee6 AJ |
1571 | bfd_size_type locsymcount; |
1572 | Elf_Internal_Shdr *symtab_hdr; | |
1573 | asection *srel; | |
70256ad8 | 1574 | |
c434dee6 | 1575 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
70256ad8 AJ |
1576 | continue; |
1577 | ||
c434dee6 | 1578 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 1579 | { |
c434dee6 AJ |
1580 | struct elf64_x86_64_dyn_relocs *p; |
1581 | ||
1582 | for (p = *((struct elf64_x86_64_dyn_relocs **) | |
1583 | &elf_section_data (s)->local_dynrel); | |
1584 | p != NULL; | |
1585 | p = p->next) | |
70256ad8 | 1586 | { |
c434dee6 AJ |
1587 | if (!bfd_is_abs_section (p->sec) |
1588 | && bfd_is_abs_section (p->sec->output_section)) | |
1589 | { | |
1590 | /* Input section has been discarded, either because | |
1591 | it is a copy of a linkonce section or due to | |
1592 | linker script /DISCARD/, so we'll be discarding | |
1593 | the relocs too. */ | |
1594 | } | |
1595 | else if (p->count != 0) | |
1596 | { | |
1597 | srel = elf_section_data (p->sec)->sreloc; | |
eea6121a | 1598 | srel->size += p->count * sizeof (Elf64_External_Rela); |
c434dee6 AJ |
1599 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
1600 | info->flags |= DF_TEXTREL; | |
1601 | ||
1602 | } | |
70256ad8 AJ |
1603 | } |
1604 | } | |
c434dee6 AJ |
1605 | |
1606 | local_got = elf_local_got_refcounts (ibfd); | |
1607 | if (!local_got) | |
1608 | continue; | |
1609 | ||
1610 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
1611 | locsymcount = symtab_hdr->sh_info; | |
1612 | end_local_got = local_got + locsymcount; | |
bffbf940 | 1613 | local_tls_type = elf64_x86_64_local_got_tls_type (ibfd); |
c434dee6 AJ |
1614 | s = htab->sgot; |
1615 | srel = htab->srelgot; | |
bffbf940 | 1616 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
70256ad8 | 1617 | { |
c434dee6 | 1618 | if (*local_got > 0) |
70256ad8 | 1619 | { |
eea6121a AM |
1620 | *local_got = s->size; |
1621 | s->size += GOT_ENTRY_SIZE; | |
bffbf940 | 1622 | if (*local_tls_type == GOT_TLS_GD) |
eea6121a | 1623 | s->size += GOT_ENTRY_SIZE; |
bffbf940 JJ |
1624 | if (info->shared |
1625 | || *local_tls_type == GOT_TLS_GD | |
1626 | || *local_tls_type == GOT_TLS_IE) | |
eea6121a | 1627 | srel->size += sizeof (Elf64_External_Rela); |
70256ad8 AJ |
1628 | } |
1629 | else | |
c434dee6 AJ |
1630 | *local_got = (bfd_vma) -1; |
1631 | } | |
1632 | } | |
70256ad8 | 1633 | |
bffbf940 JJ |
1634 | if (htab->tls_ld_got.refcount > 0) |
1635 | { | |
1636 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
1637 | relocs. */ | |
eea6121a AM |
1638 | htab->tls_ld_got.offset = htab->sgot->size; |
1639 | htab->sgot->size += 2 * GOT_ENTRY_SIZE; | |
1640 | htab->srelgot->size += sizeof (Elf64_External_Rela); | |
bffbf940 JJ |
1641 | } |
1642 | else | |
1643 | htab->tls_ld_got.offset = -1; | |
1644 | ||
c434dee6 AJ |
1645 | /* Allocate global sym .plt and .got entries, and space for global |
1646 | sym dynamic relocs. */ | |
1647 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); | |
1648 | ||
1649 | /* We now have determined the sizes of the various dynamic sections. | |
1650 | Allocate memory for them. */ | |
b34976b6 | 1651 | relocs = FALSE; |
c434dee6 AJ |
1652 | for (s = dynobj->sections; s != NULL; s = s->next) |
1653 | { | |
1654 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1655 | continue; | |
1656 | ||
1657 | if (s == htab->splt | |
1658 | || s == htab->sgot | |
75ff4589 L |
1659 | || s == htab->sgotplt |
1660 | || s == htab->sdynbss) | |
c434dee6 AJ |
1661 | { |
1662 | /* Strip this section if we don't need it; see the | |
1663 | comment below. */ | |
1664 | } | |
1665 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) | |
1666 | { | |
eea6121a | 1667 | if (s->size != 0 && s != htab->srelplt) |
b34976b6 | 1668 | relocs = TRUE; |
c434dee6 AJ |
1669 | |
1670 | /* We use the reloc_count field as a counter if we need | |
1671 | to copy relocs into the output file. */ | |
1672 | s->reloc_count = 0; | |
70256ad8 | 1673 | } |
c434dee6 | 1674 | else |
70256ad8 AJ |
1675 | { |
1676 | /* It's not one of our sections, so don't allocate space. */ | |
1677 | continue; | |
1678 | } | |
1679 | ||
eea6121a | 1680 | if (s->size == 0) |
70256ad8 | 1681 | { |
c434dee6 AJ |
1682 | /* If we don't need this section, strip it from the |
1683 | output file. This is mostly to handle .rela.bss and | |
1684 | .rela.plt. We must create both sections in | |
1685 | create_dynamic_sections, because they must be created | |
1686 | before the linker maps input sections to output | |
1687 | sections. The linker does that before | |
1688 | adjust_dynamic_symbol is called, and it is that | |
1689 | function which decides whether anything needs to go | |
1690 | into these sections. */ | |
1691 | ||
8423293d | 1692 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
1693 | continue; |
1694 | } | |
1695 | ||
c456f082 AM |
1696 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
1697 | continue; | |
1698 | ||
70256ad8 AJ |
1699 | /* Allocate memory for the section contents. We use bfd_zalloc |
1700 | here in case unused entries are not reclaimed before the | |
1701 | section's contents are written out. This should not happen, | |
1702 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
1703 | of garbage. */ | |
eea6121a | 1704 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 1705 | if (s->contents == NULL) |
b34976b6 | 1706 | return FALSE; |
70256ad8 AJ |
1707 | } |
1708 | ||
c434dee6 | 1709 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
1710 | { |
1711 | /* Add some entries to the .dynamic section. We fill in the | |
1712 | values later, in elf64_x86_64_finish_dynamic_sections, but we | |
1713 | must add the entries now so that we get the correct size for | |
407443a3 | 1714 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 1715 | dynamic linker and used by the debugger. */ |
dc810e39 | 1716 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 1717 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 1718 | |
36af4a4e | 1719 | if (info->executable) |
70256ad8 | 1720 | { |
dc810e39 | 1721 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 1722 | return FALSE; |
70256ad8 AJ |
1723 | } |
1724 | ||
eea6121a | 1725 | if (htab->splt->size != 0) |
70256ad8 | 1726 | { |
dc810e39 AM |
1727 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
1728 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
1729 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
1730 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 1731 | return FALSE; |
70256ad8 AJ |
1732 | } |
1733 | ||
1734 | if (relocs) | |
1735 | { | |
dc810e39 AM |
1736 | if (!add_dynamic_entry (DT_RELA, 0) |
1737 | || !add_dynamic_entry (DT_RELASZ, 0) | |
1738 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
b34976b6 | 1739 | return FALSE; |
70256ad8 | 1740 | |
c434dee6 AJ |
1741 | /* If any dynamic relocs apply to a read-only section, |
1742 | then we need a DT_TEXTREL entry. */ | |
1743 | if ((info->flags & DF_TEXTREL) == 0) | |
1744 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
1745 | (PTR) info); | |
1746 | ||
1747 | if ((info->flags & DF_TEXTREL) != 0) | |
1748 | { | |
1749 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 1750 | return FALSE; |
c434dee6 | 1751 | } |
70256ad8 AJ |
1752 | } |
1753 | } | |
dc810e39 | 1754 | #undef add_dynamic_entry |
70256ad8 | 1755 | |
b34976b6 | 1756 | return TRUE; |
70256ad8 AJ |
1757 | } |
1758 | ||
bffbf940 JJ |
1759 | /* Return the base VMA address which should be subtracted from real addresses |
1760 | when resolving @dtpoff relocation. | |
1761 | This is PT_TLS segment p_vaddr. */ | |
1762 | ||
1763 | static bfd_vma | |
27482721 | 1764 | dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 1765 | { |
e1918d23 AM |
1766 | /* If tls_sec is NULL, we should have signalled an error already. */ |
1767 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 1768 | return 0; |
e1918d23 | 1769 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
1770 | } |
1771 | ||
1772 | /* Return the relocation value for @tpoff relocation | |
1773 | if STT_TLS virtual address is ADDRESS. */ | |
1774 | ||
1775 | static bfd_vma | |
27482721 | 1776 | tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 1777 | { |
e1918d23 | 1778 | struct elf_link_hash_table *htab = elf_hash_table (info); |
bffbf940 JJ |
1779 | |
1780 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 1781 | if (htab->tls_sec == NULL) |
bffbf940 | 1782 | return 0; |
e1918d23 | 1783 | return address - htab->tls_size - htab->tls_sec->vma; |
bffbf940 JJ |
1784 | } |
1785 | ||
90f487df L |
1786 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
1787 | branch? */ | |
1788 | ||
1789 | static bfd_boolean | |
1790 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
1791 | { | |
1792 | /* Opcode Instruction | |
1793 | 0xe8 call | |
1794 | 0xe9 jump | |
1795 | 0x0f 0x8x conditional jump */ | |
1796 | return ((offset > 0 | |
1797 | && (contents [offset - 1] == 0xe8 | |
1798 | || contents [offset - 1] == 0xe9)) | |
1799 | || (offset > 1 | |
1800 | && contents [offset - 2] == 0x0f | |
1801 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
1802 | } | |
1803 | ||
8d88c4ca NC |
1804 | /* Relocate an x86_64 ELF section. */ |
1805 | ||
b34976b6 | 1806 | static bfd_boolean |
27482721 AJ |
1807 | elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info, |
1808 | bfd *input_bfd, asection *input_section, | |
1809 | bfd_byte *contents, Elf_Internal_Rela *relocs, | |
1810 | Elf_Internal_Sym *local_syms, | |
1811 | asection **local_sections) | |
8d88c4ca | 1812 | { |
c434dee6 | 1813 | struct elf64_x86_64_link_hash_table *htab; |
8d88c4ca NC |
1814 | Elf_Internal_Shdr *symtab_hdr; |
1815 | struct elf_link_hash_entry **sym_hashes; | |
1816 | bfd_vma *local_got_offsets; | |
c434dee6 | 1817 | Elf_Internal_Rela *rel; |
8d88c4ca NC |
1818 | Elf_Internal_Rela *relend; |
1819 | ||
1049f94e | 1820 | if (info->relocatable) |
b34976b6 | 1821 | return TRUE; |
b491616a | 1822 | |
c434dee6 | 1823 | htab = elf64_x86_64_hash_table (info); |
8d88c4ca NC |
1824 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
1825 | sym_hashes = elf_sym_hashes (input_bfd); | |
1826 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1827 | ||
c434dee6 | 1828 | rel = relocs; |
8d88c4ca | 1829 | relend = relocs + input_section->reloc_count; |
c434dee6 | 1830 | for (; rel < relend; rel++) |
8d88c4ca | 1831 | { |
bffbf940 | 1832 | unsigned int r_type; |
8d88c4ca NC |
1833 | reloc_howto_type *howto; |
1834 | unsigned long r_symndx; | |
1835 | struct elf_link_hash_entry *h; | |
1836 | Elf_Internal_Sym *sym; | |
1837 | asection *sec; | |
c434dee6 | 1838 | bfd_vma off; |
8d88c4ca | 1839 | bfd_vma relocation; |
b34976b6 | 1840 | bfd_boolean unresolved_reloc; |
8d88c4ca | 1841 | bfd_reloc_status_type r; |
bffbf940 | 1842 | int tls_type; |
8d88c4ca | 1843 | |
c434dee6 | 1844 | r_type = ELF64_R_TYPE (rel->r_info); |
fe4770f4 AJ |
1845 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
1846 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
1847 | continue; | |
8d88c4ca | 1848 | |
bffbf940 | 1849 | if (r_type >= R_X86_64_max) |
8da6118f KH |
1850 | { |
1851 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 1852 | return FALSE; |
8da6118f | 1853 | } |
8d88c4ca | 1854 | |
b491616a | 1855 | howto = x86_64_elf_howto_table + r_type; |
c434dee6 | 1856 | r_symndx = ELF64_R_SYM (rel->r_info); |
8d88c4ca NC |
1857 | h = NULL; |
1858 | sym = NULL; | |
1859 | sec = NULL; | |
b34976b6 | 1860 | unresolved_reloc = FALSE; |
8d88c4ca | 1861 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
1862 | { |
1863 | sym = local_syms + r_symndx; | |
1864 | sec = local_sections[r_symndx]; | |
c434dee6 | 1865 | |
8517fae7 | 1866 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
8da6118f | 1867 | } |
8d88c4ca | 1868 | else |
8da6118f | 1869 | { |
560e09e9 | 1870 | bfd_boolean warned; |
c434dee6 | 1871 | |
b2a8e766 AM |
1872 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
1873 | r_symndx, symtab_hdr, sym_hashes, | |
1874 | h, sec, relocation, | |
1875 | unresolved_reloc, warned); | |
8da6118f | 1876 | } |
70256ad8 AJ |
1877 | /* When generating a shared object, the relocations handled here are |
1878 | copied into the output file to be resolved at run time. */ | |
1879 | switch (r_type) | |
1880 | { | |
1881 | case R_X86_64_GOT32: | |
1882 | /* Relocation is to the entry for this symbol in the global | |
1883 | offset table. */ | |
70256ad8 AJ |
1884 | case R_X86_64_GOTPCREL: |
1885 | /* Use global offset table as symbol value. */ | |
c434dee6 AJ |
1886 | if (htab->sgot == NULL) |
1887 | abort (); | |
053579d7 | 1888 | |
51e0a107 | 1889 | if (h != NULL) |
70256ad8 | 1890 | { |
b34976b6 | 1891 | bfd_boolean dyn; |
c434dee6 AJ |
1892 | |
1893 | off = h->got.offset; | |
1894 | dyn = htab->elf.dynamic_sections_created; | |
51e0a107 | 1895 | |
27482721 | 1896 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
51e0a107 | 1897 | || (info->shared |
27482721 | 1898 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
1899 | || (ELF_ST_VISIBILITY (h->other) |
1900 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
1901 | { |
1902 | /* This is actually a static link, or it is a -Bsymbolic | |
1903 | link and the symbol is defined locally, or the symbol | |
407443a3 | 1904 | was forced to be local because of a version file. We |
51e0a107 JH |
1905 | must initialize this entry in the global offset table. |
1906 | Since the offset must always be a multiple of 8, we | |
1907 | use the least significant bit to record whether we | |
1908 | have initialized it already. | |
1909 | ||
1910 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
1911 | relocation entry to initialize the value. This is |
1912 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
1913 | if ((off & 1) != 0) |
1914 | off &= ~1; | |
1915 | else | |
1916 | { | |
1917 | bfd_put_64 (output_bfd, relocation, | |
c434dee6 | 1918 | htab->sgot->contents + off); |
51e0a107 JH |
1919 | h->got.offset |= 1; |
1920 | } | |
1921 | } | |
053579d7 | 1922 | else |
b34976b6 | 1923 | unresolved_reloc = FALSE; |
70256ad8 | 1924 | } |
51e0a107 JH |
1925 | else |
1926 | { | |
c434dee6 AJ |
1927 | if (local_got_offsets == NULL) |
1928 | abort (); | |
51e0a107 JH |
1929 | |
1930 | off = local_got_offsets[r_symndx]; | |
1931 | ||
1932 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
1933 | the least significant bit to record whether we have |
1934 | already generated the necessary reloc. */ | |
51e0a107 JH |
1935 | if ((off & 1) != 0) |
1936 | off &= ~1; | |
1937 | else | |
1938 | { | |
c434dee6 AJ |
1939 | bfd_put_64 (output_bfd, relocation, |
1940 | htab->sgot->contents + off); | |
51e0a107 JH |
1941 | |
1942 | if (info->shared) | |
1943 | { | |
947216bf | 1944 | asection *s; |
51e0a107 | 1945 | Elf_Internal_Rela outrel; |
947216bf | 1946 | bfd_byte *loc; |
70256ad8 | 1947 | |
51e0a107 JH |
1948 | /* We need to generate a R_X86_64_RELATIVE reloc |
1949 | for the dynamic linker. */ | |
947216bf AM |
1950 | s = htab->srelgot; |
1951 | if (s == NULL) | |
c434dee6 | 1952 | abort (); |
51e0a107 | 1953 | |
c434dee6 AJ |
1954 | outrel.r_offset = (htab->sgot->output_section->vma |
1955 | + htab->sgot->output_offset | |
51e0a107 JH |
1956 | + off); |
1957 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); | |
1958 | outrel.r_addend = relocation; | |
947216bf AM |
1959 | loc = s->contents; |
1960 | loc += s->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 1961 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
51e0a107 JH |
1962 | } |
1963 | ||
1964 | local_got_offsets[r_symndx] |= 1; | |
1965 | } | |
51e0a107 | 1966 | } |
6a2bda3f | 1967 | |
c434dee6 AJ |
1968 | if (off >= (bfd_vma) -2) |
1969 | abort (); | |
1970 | ||
8c37241b JJ |
1971 | relocation = htab->sgot->output_section->vma |
1972 | + htab->sgot->output_offset + off; | |
1973 | if (r_type != R_X86_64_GOTPCREL) | |
1974 | relocation -= htab->sgotplt->output_section->vma | |
1975 | - htab->sgotplt->output_offset; | |
c434dee6 | 1976 | |
70256ad8 AJ |
1977 | break; |
1978 | ||
d6ab8113 JB |
1979 | case R_X86_64_GOTOFF64: |
1980 | /* Relocation is relative to the start of the global offset | |
1981 | table. */ | |
1982 | ||
1983 | /* Check to make sure it isn't a protected function symbol | |
1984 | for shared library since it may not be local when used | |
1985 | as function address. */ | |
1986 | if (info->shared | |
1987 | && h | |
1988 | && h->def_regular | |
1989 | && h->type == STT_FUNC | |
1990 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
1991 | { | |
1992 | (*_bfd_error_handler) | |
1993 | (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"), | |
1994 | input_bfd, h->root.root.string); | |
1995 | bfd_set_error (bfd_error_bad_value); | |
1996 | return FALSE; | |
1997 | } | |
1998 | ||
1999 | /* Note that sgot is not involved in this | |
2000 | calculation. We always want the start of .got.plt. If we | |
2001 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
2002 | permitted by the ABI, we might have to change this | |
2003 | calculation. */ | |
2004 | relocation -= htab->sgotplt->output_section->vma | |
2005 | + htab->sgotplt->output_offset; | |
2006 | break; | |
2007 | ||
2008 | case R_X86_64_GOTPC32: | |
2009 | /* Use global offset table as symbol value. */ | |
2010 | relocation = htab->sgotplt->output_section->vma | |
2011 | + htab->sgotplt->output_offset; | |
2012 | unresolved_reloc = FALSE; | |
2013 | break; | |
2014 | ||
70256ad8 AJ |
2015 | case R_X86_64_PLT32: |
2016 | /* Relocation is to the entry for this symbol in the | |
2017 | procedure linkage table. */ | |
2018 | ||
2019 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 2020 | without using the procedure linkage table. */ |
70256ad8 AJ |
2021 | if (h == NULL) |
2022 | break; | |
2023 | ||
c434dee6 AJ |
2024 | if (h->plt.offset == (bfd_vma) -1 |
2025 | || htab->splt == NULL) | |
70256ad8 AJ |
2026 | { |
2027 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
2028 | happens when statically linking PIC code, or when |
2029 | using -Bsymbolic. */ | |
70256ad8 AJ |
2030 | break; |
2031 | } | |
2032 | ||
c434dee6 AJ |
2033 | relocation = (htab->splt->output_section->vma |
2034 | + htab->splt->output_offset | |
70256ad8 | 2035 | + h->plt.offset); |
b34976b6 | 2036 | unresolved_reloc = FALSE; |
70256ad8 AJ |
2037 | break; |
2038 | ||
fd8ab9e5 AJ |
2039 | case R_X86_64_PC8: |
2040 | case R_X86_64_PC16: | |
2041 | case R_X86_64_PC32: | |
6610a52d L |
2042 | if (info->shared |
2043 | && !SYMBOL_REFERENCES_LOCAL (info, h) | |
ba3bee0b | 2044 | && (input_section->flags & SEC_ALLOC) != 0 |
90f487df L |
2045 | && (input_section->flags & SEC_READONLY) != 0 |
2046 | && (!h->def_regular | |
2047 | || r_type != R_X86_64_PC32 | |
2048 | || h->type != STT_FUNC | |
2049 | || ELF_ST_VISIBILITY (h->other) != STV_PROTECTED | |
2050 | || !is_32bit_relative_branch (contents, | |
2051 | rel->r_offset))) | |
6610a52d | 2052 | { |
90f487df L |
2053 | if (h->def_regular |
2054 | && r_type == R_X86_64_PC32 | |
2055 | && h->type == STT_FUNC | |
2056 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
2057 | (*_bfd_error_handler) | |
2058 | (_("%B: relocation R_X86_64_PC32 against protected function `%s' can not be used when making a shared object"), | |
2059 | input_bfd, h->root.root.string); | |
2060 | else | |
2061 | (*_bfd_error_handler) | |
2062 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), | |
2063 | input_bfd, x86_64_elf_howto_table[r_type].name, | |
2064 | h->root.root.string); | |
6610a52d L |
2065 | bfd_set_error (bfd_error_bad_value); |
2066 | return FALSE; | |
2067 | } | |
2068 | /* Fall through. */ | |
2069 | ||
70256ad8 AJ |
2070 | case R_X86_64_8: |
2071 | case R_X86_64_16: | |
2072 | case R_X86_64_32: | |
d6ab8113 | 2073 | case R_X86_64_PC64: |
6b3db546 | 2074 | case R_X86_64_64: |
80643fbc | 2075 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 2076 | the same when it's zeroextended to 64 bit. */ |
c434dee6 AJ |
2077 | |
2078 | /* r_symndx will be zero only for relocs against symbols | |
2079 | from removed linkonce sections, or sections discarded by | |
2080 | a linker script. */ | |
2081 | if (r_symndx == 0 | |
2082 | || (input_section->flags & SEC_ALLOC) == 0) | |
2083 | break; | |
2084 | ||
2085 | if ((info->shared | |
4bc6e03a AJ |
2086 | && (h == NULL |
2087 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2088 | || h->root.type != bfd_link_hash_undefweak) | |
c434dee6 AJ |
2089 | && ((r_type != R_X86_64_PC8 |
2090 | && r_type != R_X86_64_PC16 | |
d6ab8113 JB |
2091 | && r_type != R_X86_64_PC32 |
2092 | && r_type != R_X86_64_PC64) | |
f6c52c13 | 2093 | || !SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c AJ |
2094 | || (ELIMINATE_COPY_RELOCS |
2095 | && !info->shared | |
c434dee6 AJ |
2096 | && h != NULL |
2097 | && h->dynindx != -1 | |
f5385ebf AM |
2098 | && !h->non_got_ref |
2099 | && ((h->def_dynamic | |
2100 | && !h->def_regular) | |
c434dee6 AJ |
2101 | || h->root.type == bfd_link_hash_undefweak |
2102 | || h->root.type == bfd_link_hash_undefined))) | |
70256ad8 AJ |
2103 | { |
2104 | Elf_Internal_Rela outrel; | |
947216bf | 2105 | bfd_byte *loc; |
b34976b6 | 2106 | bfd_boolean skip, relocate; |
c434dee6 | 2107 | asection *sreloc; |
70256ad8 AJ |
2108 | |
2109 | /* When generating a shared object, these relocations | |
2110 | are copied into the output file to be resolved at run | |
407443a3 | 2111 | time. */ |
b34976b6 AM |
2112 | skip = FALSE; |
2113 | relocate = FALSE; | |
70256ad8 | 2114 | |
c629eae0 JJ |
2115 | outrel.r_offset = |
2116 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 2117 | rel->r_offset); |
c629eae0 | 2118 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 2119 | skip = TRUE; |
0fb19cbc | 2120 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2121 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
2122 | |
2123 | outrel.r_offset += (input_section->output_section->vma | |
2124 | + input_section->output_offset); | |
2125 | ||
2126 | if (skip) | |
0bb2d96a | 2127 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 2128 | |
fd8ab9e5 AJ |
2129 | /* h->dynindx may be -1 if this symbol was marked to |
2130 | become local. */ | |
2131 | else if (h != NULL | |
c434dee6 AJ |
2132 | && h->dynindx != -1 |
2133 | && (r_type == R_X86_64_PC8 | |
2134 | || r_type == R_X86_64_PC16 | |
2135 | || r_type == R_X86_64_PC32 | |
d6ab8113 | 2136 | || r_type == R_X86_64_PC64 |
c434dee6 AJ |
2137 | || !info->shared |
2138 | || !info->symbolic | |
f5385ebf | 2139 | || !h->def_regular)) |
70256ad8 | 2140 | { |
70256ad8 | 2141 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
c434dee6 | 2142 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
2143 | } |
2144 | else | |
2145 | { | |
c434dee6 | 2146 | /* This symbol is local, or marked to become local. */ |
607c0e09 AS |
2147 | if (r_type == R_X86_64_64) |
2148 | { | |
b34976b6 | 2149 | relocate = TRUE; |
607c0e09 AS |
2150 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
2151 | outrel.r_addend = relocation + rel->r_addend; | |
2152 | } | |
2153 | else | |
2154 | { | |
2155 | long sindx; | |
2156 | ||
8517fae7 | 2157 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
2158 | sindx = 0; |
2159 | else if (sec == NULL || sec->owner == NULL) | |
2160 | { | |
2161 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2162 | return FALSE; |
607c0e09 AS |
2163 | } |
2164 | else | |
2165 | { | |
2166 | asection *osec; | |
2167 | ||
2168 | osec = sec->output_section; | |
2169 | sindx = elf_section_data (osec)->dynindx; | |
2170 | BFD_ASSERT (sindx > 0); | |
2171 | } | |
2172 | ||
2173 | outrel.r_info = ELF64_R_INFO (sindx, r_type); | |
2174 | outrel.r_addend = relocation + rel->r_addend; | |
2175 | } | |
70256ad8 AJ |
2176 | } |
2177 | ||
c434dee6 AJ |
2178 | sreloc = elf_section_data (input_section)->sreloc; |
2179 | if (sreloc == NULL) | |
2180 | abort (); | |
2181 | ||
947216bf AM |
2182 | loc = sreloc->contents; |
2183 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 2184 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
70256ad8 AJ |
2185 | |
2186 | /* If this reloc is against an external symbol, we do | |
2187 | not want to fiddle with the addend. Otherwise, we | |
2188 | need to include the symbol value so that it becomes | |
2189 | an addend for the dynamic reloc. */ | |
2190 | if (! relocate) | |
2191 | continue; | |
2192 | } | |
2193 | ||
2194 | break; | |
2195 | ||
bffbf940 JJ |
2196 | case R_X86_64_TLSGD: |
2197 | case R_X86_64_GOTTPOFF: | |
2198 | r_type = elf64_x86_64_tls_transition (info, r_type, h == NULL); | |
2199 | tls_type = GOT_UNKNOWN; | |
2200 | if (h == NULL && local_got_offsets) | |
2201 | tls_type = elf64_x86_64_local_got_tls_type (input_bfd) [r_symndx]; | |
2202 | else if (h != NULL) | |
2203 | { | |
2204 | tls_type = elf64_x86_64_hash_entry (h)->tls_type; | |
2205 | if (!info->shared && h->dynindx == -1 && tls_type == GOT_TLS_IE) | |
2206 | r_type = R_X86_64_TPOFF32; | |
2207 | } | |
2208 | if (r_type == R_X86_64_TLSGD) | |
2209 | { | |
2210 | if (tls_type == GOT_TLS_IE) | |
2211 | r_type = R_X86_64_GOTTPOFF; | |
2212 | } | |
2213 | ||
2214 | if (r_type == R_X86_64_TPOFF32) | |
2215 | { | |
2216 | BFD_ASSERT (! unresolved_reloc); | |
2217 | if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSGD) | |
2218 | { | |
2219 | unsigned int i; | |
abcf1d52 JJ |
2220 | static unsigned char tlsgd[8] |
2221 | = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 }; | |
bffbf940 JJ |
2222 | |
2223 | /* GD->LE transition. | |
abcf1d52 JJ |
2224 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
2225 | .word 0x6666; rex64; call __tls_get_addr@plt | |
bffbf940 JJ |
2226 | Change it into: |
2227 | movq %fs:0, %rax | |
2228 | leaq foo@tpoff(%rax), %rax */ | |
abcf1d52 JJ |
2229 | BFD_ASSERT (rel->r_offset >= 4); |
2230 | for (i = 0; i < 4; i++) | |
bffbf940 | 2231 | BFD_ASSERT (bfd_get_8 (input_bfd, |
abcf1d52 | 2232 | contents + rel->r_offset - 4 + i) |
bffbf940 | 2233 | == tlsgd[i]); |
eea6121a | 2234 | BFD_ASSERT (rel->r_offset + 12 <= input_section->size); |
abcf1d52 JJ |
2235 | for (i = 0; i < 4; i++) |
2236 | BFD_ASSERT (bfd_get_8 (input_bfd, | |
2237 | contents + rel->r_offset + 4 + i) | |
2238 | == tlsgd[i+4]); | |
bffbf940 JJ |
2239 | BFD_ASSERT (rel + 1 < relend); |
2240 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
abcf1d52 | 2241 | memcpy (contents + rel->r_offset - 4, |
bffbf940 JJ |
2242 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", |
2243 | 16); | |
2244 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
abcf1d52 | 2245 | contents + rel->r_offset + 8); |
bffbf940 JJ |
2246 | /* Skip R_X86_64_PLT32. */ |
2247 | rel++; | |
2248 | continue; | |
2249 | } | |
2250 | else | |
2251 | { | |
2252 | unsigned int val, type, reg; | |
2253 | ||
2254 | /* IE->LE transition: | |
2255 | Originally it can be one of: | |
2256 | movq foo@gottpoff(%rip), %reg | |
2257 | addq foo@gottpoff(%rip), %reg | |
2258 | We change it into: | |
2259 | movq $foo, %reg | |
2260 | leaq foo(%reg), %reg | |
2261 | addq $foo, %reg. */ | |
2262 | BFD_ASSERT (rel->r_offset >= 3); | |
2263 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 3); | |
2264 | BFD_ASSERT (val == 0x48 || val == 0x4c); | |
2265 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
2266 | BFD_ASSERT (type == 0x8b || type == 0x03); | |
2267 | reg = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
2268 | BFD_ASSERT ((reg & 0xc7) == 5); | |
2269 | reg >>= 3; | |
eea6121a | 2270 | BFD_ASSERT (rel->r_offset + 4 <= input_section->size); |
bffbf940 JJ |
2271 | if (type == 0x8b) |
2272 | { | |
2273 | /* movq */ | |
2274 | if (val == 0x4c) | |
2275 | bfd_put_8 (output_bfd, 0x49, | |
2276 | contents + rel->r_offset - 3); | |
2277 | bfd_put_8 (output_bfd, 0xc7, | |
2278 | contents + rel->r_offset - 2); | |
2279 | bfd_put_8 (output_bfd, 0xc0 | reg, | |
2280 | contents + rel->r_offset - 1); | |
2281 | } | |
2282 | else if (reg == 4) | |
2283 | { | |
2284 | /* addq -> addq - addressing with %rsp/%r12 is | |
2285 | special */ | |
2286 | if (val == 0x4c) | |
2287 | bfd_put_8 (output_bfd, 0x49, | |
2288 | contents + rel->r_offset - 3); | |
2289 | bfd_put_8 (output_bfd, 0x81, | |
2290 | contents + rel->r_offset - 2); | |
2291 | bfd_put_8 (output_bfd, 0xc0 | reg, | |
2292 | contents + rel->r_offset - 1); | |
2293 | } | |
2294 | else | |
2295 | { | |
2296 | /* addq -> leaq */ | |
2297 | if (val == 0x4c) | |
2298 | bfd_put_8 (output_bfd, 0x4d, | |
2299 | contents + rel->r_offset - 3); | |
2300 | bfd_put_8 (output_bfd, 0x8d, | |
2301 | contents + rel->r_offset - 2); | |
2302 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), | |
2303 | contents + rel->r_offset - 1); | |
2304 | } | |
2305 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
2306 | contents + rel->r_offset); | |
2307 | continue; | |
2308 | } | |
2309 | } | |
2310 | ||
2311 | if (htab->sgot == NULL) | |
2312 | abort (); | |
2313 | ||
2314 | if (h != NULL) | |
2315 | off = h->got.offset; | |
2316 | else | |
2317 | { | |
2318 | if (local_got_offsets == NULL) | |
2319 | abort (); | |
2320 | ||
2321 | off = local_got_offsets[r_symndx]; | |
2322 | } | |
2323 | ||
2324 | if ((off & 1) != 0) | |
2325 | off &= ~1; | |
26e41594 | 2326 | else |
bffbf940 JJ |
2327 | { |
2328 | Elf_Internal_Rela outrel; | |
947216bf | 2329 | bfd_byte *loc; |
bffbf940 JJ |
2330 | int dr_type, indx; |
2331 | ||
2332 | if (htab->srelgot == NULL) | |
2333 | abort (); | |
2334 | ||
2335 | outrel.r_offset = (htab->sgot->output_section->vma | |
2336 | + htab->sgot->output_offset + off); | |
2337 | ||
2338 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
2339 | if (r_type == R_X86_64_TLSGD) | |
2340 | dr_type = R_X86_64_DTPMOD64; | |
2341 | else | |
2342 | dr_type = R_X86_64_TPOFF64; | |
2343 | ||
2344 | bfd_put_64 (output_bfd, 0, htab->sgot->contents + off); | |
2345 | outrel.r_addend = 0; | |
2346 | if (dr_type == R_X86_64_TPOFF64 && indx == 0) | |
2347 | outrel.r_addend = relocation - dtpoff_base (info); | |
2348 | outrel.r_info = ELF64_R_INFO (indx, dr_type); | |
2349 | ||
947216bf AM |
2350 | loc = htab->srelgot->contents; |
2351 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
bffbf940 JJ |
2352 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
2353 | ||
2354 | if (r_type == R_X86_64_TLSGD) | |
2355 | { | |
2356 | if (indx == 0) | |
2357 | { | |
d40d037c | 2358 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 JJ |
2359 | bfd_put_64 (output_bfd, |
2360 | relocation - dtpoff_base (info), | |
2361 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2362 | } | |
2363 | else | |
2364 | { | |
2365 | bfd_put_64 (output_bfd, 0, | |
2366 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2367 | outrel.r_info = ELF64_R_INFO (indx, | |
2368 | R_X86_64_DTPOFF64); | |
2369 | outrel.r_offset += GOT_ENTRY_SIZE; | |
2370 | htab->srelgot->reloc_count++; | |
947216bf AM |
2371 | loc += sizeof (Elf64_External_Rela); |
2372 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
bffbf940 JJ |
2373 | } |
2374 | } | |
2375 | ||
2376 | if (h != NULL) | |
2377 | h->got.offset |= 1; | |
2378 | else | |
2379 | local_got_offsets[r_symndx] |= 1; | |
2380 | } | |
2381 | ||
2382 | if (off >= (bfd_vma) -2) | |
2383 | abort (); | |
2384 | if (r_type == ELF64_R_TYPE (rel->r_info)) | |
2385 | { | |
2386 | relocation = htab->sgot->output_section->vma | |
2387 | + htab->sgot->output_offset + off; | |
b34976b6 | 2388 | unresolved_reloc = FALSE; |
bffbf940 JJ |
2389 | } |
2390 | else | |
2391 | { | |
2392 | unsigned int i; | |
abcf1d52 JJ |
2393 | static unsigned char tlsgd[8] |
2394 | = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 }; | |
bffbf940 JJ |
2395 | |
2396 | /* GD->IE transition. | |
abcf1d52 JJ |
2397 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
2398 | .word 0x6666; rex64; call __tls_get_addr@plt | |
bffbf940 JJ |
2399 | Change it into: |
2400 | movq %fs:0, %rax | |
2401 | addq foo@gottpoff(%rip), %rax */ | |
abcf1d52 JJ |
2402 | BFD_ASSERT (rel->r_offset >= 4); |
2403 | for (i = 0; i < 4; i++) | |
26e41594 | 2404 | BFD_ASSERT (bfd_get_8 (input_bfd, |
abcf1d52 | 2405 | contents + rel->r_offset - 4 + i) |
bffbf940 | 2406 | == tlsgd[i]); |
eea6121a | 2407 | BFD_ASSERT (rel->r_offset + 12 <= input_section->size); |
abcf1d52 | 2408 | for (i = 0; i < 4; i++) |
26e41594 | 2409 | BFD_ASSERT (bfd_get_8 (input_bfd, |
abcf1d52 JJ |
2410 | contents + rel->r_offset + 4 + i) |
2411 | == tlsgd[i+4]); | |
bffbf940 JJ |
2412 | BFD_ASSERT (rel + 1 < relend); |
2413 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
abcf1d52 | 2414 | memcpy (contents + rel->r_offset - 4, |
bffbf940 JJ |
2415 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", |
2416 | 16); | |
2417 | ||
2418 | relocation = (htab->sgot->output_section->vma | |
2419 | + htab->sgot->output_offset + off | |
2420 | - rel->r_offset | |
2421 | - input_section->output_section->vma | |
2422 | - input_section->output_offset | |
abcf1d52 | 2423 | - 12); |
bffbf940 | 2424 | bfd_put_32 (output_bfd, relocation, |
abcf1d52 | 2425 | contents + rel->r_offset + 8); |
bffbf940 JJ |
2426 | /* Skip R_X86_64_PLT32. */ |
2427 | rel++; | |
2428 | continue; | |
2429 | } | |
2430 | break; | |
2431 | ||
2432 | case R_X86_64_TLSLD: | |
2433 | if (! info->shared) | |
2434 | { | |
2435 | /* LD->LE transition: | |
2436 | Ensure it is: | |
2437 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr@plt. | |
2438 | We change it into: | |
2439 | .word 0x6666; .byte 0x66; movl %fs:0, %rax. */ | |
2440 | BFD_ASSERT (rel->r_offset >= 3); | |
2441 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 3) | |
2442 | == 0x48); | |
2443 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2) | |
2444 | == 0x8d); | |
2445 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 1) | |
2446 | == 0x3d); | |
eea6121a | 2447 | BFD_ASSERT (rel->r_offset + 9 <= input_section->size); |
bffbf940 JJ |
2448 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4) |
2449 | == 0xe8); | |
2450 | BFD_ASSERT (rel + 1 < relend); | |
2451 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
2452 | memcpy (contents + rel->r_offset - 3, | |
2453 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
2454 | /* Skip R_X86_64_PLT32. */ | |
2455 | rel++; | |
2456 | continue; | |
2457 | } | |
2458 | ||
2459 | if (htab->sgot == NULL) | |
2460 | abort (); | |
2461 | ||
2462 | off = htab->tls_ld_got.offset; | |
2463 | if (off & 1) | |
2464 | off &= ~1; | |
2465 | else | |
2466 | { | |
2467 | Elf_Internal_Rela outrel; | |
947216bf | 2468 | bfd_byte *loc; |
bffbf940 JJ |
2469 | |
2470 | if (htab->srelgot == NULL) | |
2471 | abort (); | |
2472 | ||
2473 | outrel.r_offset = (htab->sgot->output_section->vma | |
2474 | + htab->sgot->output_offset + off); | |
2475 | ||
2476 | bfd_put_64 (output_bfd, 0, | |
2477 | htab->sgot->contents + off); | |
2478 | bfd_put_64 (output_bfd, 0, | |
2479 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2480 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_DTPMOD64); | |
2481 | outrel.r_addend = 0; | |
947216bf AM |
2482 | loc = htab->srelgot->contents; |
2483 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
bffbf940 JJ |
2484 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
2485 | htab->tls_ld_got.offset |= 1; | |
2486 | } | |
2487 | relocation = htab->sgot->output_section->vma | |
2488 | + htab->sgot->output_offset + off; | |
b34976b6 | 2489 | unresolved_reloc = FALSE; |
bffbf940 JJ |
2490 | break; |
2491 | ||
2492 | case R_X86_64_DTPOFF32: | |
a45bb67d | 2493 | if (info->shared || (input_section->flags & SEC_CODE) == 0) |
bffbf940 JJ |
2494 | relocation -= dtpoff_base (info); |
2495 | else | |
2496 | relocation = tpoff (info, relocation); | |
2497 | break; | |
2498 | ||
2499 | case R_X86_64_TPOFF32: | |
2500 | BFD_ASSERT (! info->shared); | |
2501 | relocation = tpoff (info, relocation); | |
2502 | break; | |
2503 | ||
70256ad8 AJ |
2504 | default: |
2505 | break; | |
2506 | } | |
8d88c4ca | 2507 | |
239e1f3a AM |
2508 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
2509 | because such sections are not SEC_ALLOC and thus ld.so will | |
2510 | not process them. */ | |
c434dee6 | 2511 | if (unresolved_reloc |
239e1f3a | 2512 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
f5385ebf | 2513 | && h->def_dynamic)) |
c434dee6 | 2514 | (*_bfd_error_handler) |
d003868e AM |
2515 | (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"), |
2516 | input_bfd, | |
2517 | input_section, | |
c434dee6 AJ |
2518 | (long) rel->r_offset, |
2519 | h->root.root.string); | |
2520 | ||
8d88c4ca | 2521 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
2522 | contents, rel->r_offset, |
2523 | relocation, rel->r_addend); | |
8d88c4ca NC |
2524 | |
2525 | if (r != bfd_reloc_ok) | |
8da6118f | 2526 | { |
c434dee6 AJ |
2527 | const char *name; |
2528 | ||
2529 | if (h != NULL) | |
2530 | name = h->root.root.string; | |
2531 | else | |
8da6118f | 2532 | { |
c434dee6 AJ |
2533 | name = bfd_elf_string_from_elf_section (input_bfd, |
2534 | symtab_hdr->sh_link, | |
2535 | sym->st_name); | |
2536 | if (name == NULL) | |
b34976b6 | 2537 | return FALSE; |
c434dee6 AJ |
2538 | if (*name == '\0') |
2539 | name = bfd_section_name (input_bfd, sec); | |
2540 | } | |
2541 | ||
2542 | if (r == bfd_reloc_overflow) | |
2543 | { | |
3ffa5234 AM |
2544 | if (h != NULL |
2545 | && h->root.type == bfd_link_hash_undefweak | |
2546 | && howto->pc_relative) | |
2547 | /* Ignore reloc overflow on branches to undefweak syms. */ | |
2548 | continue; | |
c434dee6 AJ |
2549 | |
2550 | if (! ((*info->callbacks->reloc_overflow) | |
dfeffb9f L |
2551 | (info, (h ? &h->root : NULL), name, howto->name, |
2552 | (bfd_vma) 0, input_bfd, input_section, | |
2553 | rel->r_offset))) | |
b34976b6 | 2554 | return FALSE; |
c434dee6 AJ |
2555 | } |
2556 | else | |
2557 | { | |
2558 | (*_bfd_error_handler) | |
d003868e AM |
2559 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
2560 | input_bfd, input_section, | |
c434dee6 | 2561 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 2562 | return FALSE; |
8da6118f KH |
2563 | } |
2564 | } | |
8d88c4ca | 2565 | } |
70256ad8 | 2566 | |
b34976b6 | 2567 | return TRUE; |
70256ad8 AJ |
2568 | } |
2569 | ||
2570 | /* Finish up dynamic symbol handling. We set the contents of various | |
2571 | dynamic sections here. */ | |
2572 | ||
b34976b6 | 2573 | static bfd_boolean |
27482721 AJ |
2574 | elf64_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
2575 | struct bfd_link_info *info, | |
2576 | struct elf_link_hash_entry *h, | |
2577 | Elf_Internal_Sym *sym) | |
70256ad8 | 2578 | { |
c434dee6 | 2579 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 | 2580 | |
c434dee6 | 2581 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
2582 | |
2583 | if (h->plt.offset != (bfd_vma) -1) | |
2584 | { | |
70256ad8 AJ |
2585 | bfd_vma plt_index; |
2586 | bfd_vma got_offset; | |
2587 | Elf_Internal_Rela rela; | |
947216bf | 2588 | bfd_byte *loc; |
70256ad8 AJ |
2589 | |
2590 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 2591 | it up. */ |
c434dee6 AJ |
2592 | if (h->dynindx == -1 |
2593 | || htab->splt == NULL | |
2594 | || htab->sgotplt == NULL | |
2595 | || htab->srelplt == NULL) | |
2596 | abort (); | |
70256ad8 AJ |
2597 | |
2598 | /* Get the index in the procedure linkage table which | |
2599 | corresponds to this symbol. This is the index of this symbol | |
2600 | in all the symbols for which we are making plt entries. The | |
2601 | first entry in the procedure linkage table is reserved. */ | |
2602 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
2603 | ||
2604 | /* Get the offset into the .got table of the entry that | |
407443a3 | 2605 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
fe4770f4 | 2606 | bytes. The first three are reserved for the dynamic linker. */ |
70256ad8 AJ |
2607 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
2608 | ||
2609 | /* Fill in the entry in the procedure linkage table. */ | |
c434dee6 | 2610 | memcpy (htab->splt->contents + h->plt.offset, elf64_x86_64_plt_entry, |
70256ad8 AJ |
2611 | PLT_ENTRY_SIZE); |
2612 | ||
2613 | /* Insert the relocation positions of the plt section. The magic | |
2614 | numbers at the end of the statements are the positions of the | |
2615 | relocations in the plt section. */ | |
653165cc AJ |
2616 | /* Put offset for jmp *name@GOTPCREL(%rip), since the |
2617 | instruction uses 6 bytes, subtract this value. */ | |
2618 | bfd_put_32 (output_bfd, | |
c434dee6 AJ |
2619 | (htab->sgotplt->output_section->vma |
2620 | + htab->sgotplt->output_offset | |
653165cc | 2621 | + got_offset |
c434dee6 AJ |
2622 | - htab->splt->output_section->vma |
2623 | - htab->splt->output_offset | |
653165cc AJ |
2624 | - h->plt.offset |
2625 | - 6), | |
c434dee6 | 2626 | htab->splt->contents + h->plt.offset + 2); |
653165cc AJ |
2627 | /* Put relocation index. */ |
2628 | bfd_put_32 (output_bfd, plt_index, | |
c434dee6 | 2629 | htab->splt->contents + h->plt.offset + 7); |
653165cc AJ |
2630 | /* Put offset for jmp .PLT0. */ |
2631 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), | |
c434dee6 | 2632 | htab->splt->contents + h->plt.offset + 12); |
70256ad8 | 2633 | |
653165cc AJ |
2634 | /* Fill in the entry in the global offset table, initially this |
2635 | points to the pushq instruction in the PLT which is at offset 6. */ | |
c434dee6 AJ |
2636 | bfd_put_64 (output_bfd, (htab->splt->output_section->vma |
2637 | + htab->splt->output_offset | |
70256ad8 | 2638 | + h->plt.offset + 6), |
c434dee6 | 2639 | htab->sgotplt->contents + got_offset); |
70256ad8 AJ |
2640 | |
2641 | /* Fill in the entry in the .rela.plt section. */ | |
c434dee6 AJ |
2642 | rela.r_offset = (htab->sgotplt->output_section->vma |
2643 | + htab->sgotplt->output_offset | |
70256ad8 AJ |
2644 | + got_offset); |
2645 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_JUMP_SLOT); | |
2646 | rela.r_addend = 0; | |
947216bf | 2647 | loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela); |
c434dee6 | 2648 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 | 2649 | |
f5385ebf | 2650 | if (!h->def_regular) |
70256ad8 AJ |
2651 | { |
2652 | /* Mark the symbol as undefined, rather than as defined in | |
47a9f7b3 JJ |
2653 | the .plt section. Leave the value if there were any |
2654 | relocations where pointer equality matters (this is a clue | |
c434dee6 AJ |
2655 | for the dynamic linker, to make function pointer |
2656 | comparisons work between an application and shared | |
47a9f7b3 JJ |
2657 | library), otherwise set it to zero. If a function is only |
2658 | called from a binary, there is no need to slow down | |
2659 | shared libraries because of that. */ | |
70256ad8 | 2660 | sym->st_shndx = SHN_UNDEF; |
f5385ebf | 2661 | if (!h->pointer_equality_needed) |
47a9f7b3 | 2662 | sym->st_value = 0; |
70256ad8 AJ |
2663 | } |
2664 | } | |
2665 | ||
bffbf940 JJ |
2666 | if (h->got.offset != (bfd_vma) -1 |
2667 | && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_GD | |
2668 | && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE) | |
053579d7 | 2669 | { |
053579d7 | 2670 | Elf_Internal_Rela rela; |
947216bf | 2671 | bfd_byte *loc; |
053579d7 AJ |
2672 | |
2673 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 2674 | up. */ |
c434dee6 AJ |
2675 | if (htab->sgot == NULL || htab->srelgot == NULL) |
2676 | abort (); | |
053579d7 | 2677 | |
c434dee6 AJ |
2678 | rela.r_offset = (htab->sgot->output_section->vma |
2679 | + htab->sgot->output_offset | |
dc810e39 | 2680 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
2681 | |
2682 | /* If this is a static link, or it is a -Bsymbolic link and the | |
2683 | symbol is defined locally or was forced to be local because | |
2684 | of a version file, we just want to emit a RELATIVE reloc. | |
2685 | The entry in the global offset table will already have been | |
2686 | initialized in the relocate_section function. */ | |
c434dee6 | 2687 | if (info->shared |
27482721 | 2688 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
053579d7 | 2689 | { |
cc78d0af | 2690 | BFD_ASSERT((h->got.offset & 1) != 0); |
053579d7 AJ |
2691 | rela.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
2692 | rela.r_addend = (h->root.u.def.value | |
2693 | + h->root.u.def.section->output_section->vma | |
2694 | + h->root.u.def.section->output_offset); | |
2695 | } | |
2696 | else | |
2697 | { | |
2698 | BFD_ASSERT((h->got.offset & 1) == 0); | |
c434dee6 AJ |
2699 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
2700 | htab->sgot->contents + h->got.offset); | |
053579d7 AJ |
2701 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_GLOB_DAT); |
2702 | rela.r_addend = 0; | |
2703 | } | |
2704 | ||
947216bf AM |
2705 | loc = htab->srelgot->contents; |
2706 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 2707 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
053579d7 AJ |
2708 | } |
2709 | ||
f5385ebf | 2710 | if (h->needs_copy) |
70256ad8 | 2711 | { |
70256ad8 | 2712 | Elf_Internal_Rela rela; |
947216bf | 2713 | bfd_byte *loc; |
70256ad8 AJ |
2714 | |
2715 | /* This symbol needs a copy reloc. Set it up. */ | |
2716 | ||
c434dee6 AJ |
2717 | if (h->dynindx == -1 |
2718 | || (h->root.type != bfd_link_hash_defined | |
2719 | && h->root.type != bfd_link_hash_defweak) | |
2720 | || htab->srelbss == NULL) | |
2721 | abort (); | |
70256ad8 AJ |
2722 | |
2723 | rela.r_offset = (h->root.u.def.value | |
2724 | + h->root.u.def.section->output_section->vma | |
2725 | + h->root.u.def.section->output_offset); | |
2726 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_COPY); | |
2727 | rela.r_addend = 0; | |
947216bf AM |
2728 | loc = htab->srelbss->contents; |
2729 | loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 2730 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 AJ |
2731 | } |
2732 | ||
2733 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2734 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
2735 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2736 | sym->st_shndx = SHN_ABS; | |
2737 | ||
b34976b6 | 2738 | return TRUE; |
70256ad8 AJ |
2739 | } |
2740 | ||
c434dee6 AJ |
2741 | /* Used to decide how to sort relocs in an optimal manner for the |
2742 | dynamic linker, before writing them out. */ | |
2743 | ||
2744 | static enum elf_reloc_type_class | |
27482721 | 2745 | elf64_x86_64_reloc_type_class (const Elf_Internal_Rela *rela) |
c434dee6 AJ |
2746 | { |
2747 | switch ((int) ELF64_R_TYPE (rela->r_info)) | |
2748 | { | |
2749 | case R_X86_64_RELATIVE: | |
2750 | return reloc_class_relative; | |
2751 | case R_X86_64_JUMP_SLOT: | |
2752 | return reloc_class_plt; | |
2753 | case R_X86_64_COPY: | |
2754 | return reloc_class_copy; | |
2755 | default: | |
2756 | return reloc_class_normal; | |
2757 | } | |
2758 | } | |
2759 | ||
70256ad8 AJ |
2760 | /* Finish up the dynamic sections. */ |
2761 | ||
b34976b6 | 2762 | static bfd_boolean |
27482721 | 2763 | elf64_x86_64_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
70256ad8 | 2764 | { |
c434dee6 | 2765 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2766 | bfd *dynobj; |
2767 | asection *sdyn; | |
70256ad8 | 2768 | |
c434dee6 AJ |
2769 | htab = elf64_x86_64_hash_table (info); |
2770 | dynobj = htab->elf.dynobj; | |
70256ad8 AJ |
2771 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
2772 | ||
c434dee6 | 2773 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 2774 | { |
70256ad8 AJ |
2775 | Elf64_External_Dyn *dyncon, *dynconend; |
2776 | ||
c434dee6 AJ |
2777 | if (sdyn == NULL || htab->sgot == NULL) |
2778 | abort (); | |
70256ad8 AJ |
2779 | |
2780 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
eea6121a | 2781 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); |
70256ad8 AJ |
2782 | for (; dyncon < dynconend; dyncon++) |
2783 | { | |
2784 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
2785 | asection *s; |
2786 | ||
2787 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); | |
2788 | ||
2789 | switch (dyn.d_tag) | |
2790 | { | |
2791 | default: | |
053579d7 | 2792 | continue; |
70256ad8 AJ |
2793 | |
2794 | case DT_PLTGOT: | |
8c37241b JJ |
2795 | s = htab->sgotplt; |
2796 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
c434dee6 | 2797 | break; |
70256ad8 AJ |
2798 | |
2799 | case DT_JMPREL: | |
c434dee6 AJ |
2800 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
2801 | break; | |
70256ad8 | 2802 | |
c434dee6 AJ |
2803 | case DT_PLTRELSZ: |
2804 | s = htab->srelplt->output_section; | |
eea6121a | 2805 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
2806 | break; |
2807 | ||
2808 | case DT_RELASZ: | |
c434dee6 AJ |
2809 | /* The procedure linkage table relocs (DT_JMPREL) should |
2810 | not be included in the overall relocs (DT_RELA). | |
2811 | Therefore, we override the DT_RELASZ entry here to | |
2812 | make it not include the JMPREL relocs. Since the | |
2813 | linker script arranges for .rela.plt to follow all | |
2814 | other relocation sections, we don't have to worry | |
2815 | about changing the DT_RELA entry. */ | |
2816 | if (htab->srelplt != NULL) | |
70256ad8 | 2817 | { |
c434dee6 | 2818 | s = htab->srelplt->output_section; |
eea6121a | 2819 | dyn.d_un.d_val -= s->size; |
70256ad8 AJ |
2820 | } |
2821 | break; | |
70256ad8 | 2822 | } |
c434dee6 | 2823 | |
70256ad8 AJ |
2824 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
2825 | } | |
2826 | ||
c434dee6 | 2827 | /* Fill in the special first entry in the procedure linkage table. */ |
eea6121a | 2828 | if (htab->splt && htab->splt->size > 0) |
70256ad8 | 2829 | { |
653165cc | 2830 | /* Fill in the first entry in the procedure linkage table. */ |
c434dee6 AJ |
2831 | memcpy (htab->splt->contents, elf64_x86_64_plt0_entry, |
2832 | PLT_ENTRY_SIZE); | |
653165cc AJ |
2833 | /* Add offset for pushq GOT+8(%rip), since the instruction |
2834 | uses 6 bytes subtract this value. */ | |
2835 | bfd_put_32 (output_bfd, | |
c434dee6 AJ |
2836 | (htab->sgotplt->output_section->vma |
2837 | + htab->sgotplt->output_offset | |
653165cc | 2838 | + 8 |
c434dee6 AJ |
2839 | - htab->splt->output_section->vma |
2840 | - htab->splt->output_offset | |
653165cc | 2841 | - 6), |
c434dee6 | 2842 | htab->splt->contents + 2); |
653165cc AJ |
2843 | /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to |
2844 | the end of the instruction. */ | |
2845 | bfd_put_32 (output_bfd, | |
c434dee6 AJ |
2846 | (htab->sgotplt->output_section->vma |
2847 | + htab->sgotplt->output_offset | |
653165cc | 2848 | + 16 |
c434dee6 AJ |
2849 | - htab->splt->output_section->vma |
2850 | - htab->splt->output_offset | |
653165cc | 2851 | - 12), |
c434dee6 | 2852 | htab->splt->contents + 8); |
653165cc | 2853 | |
c434dee6 AJ |
2854 | elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize = |
2855 | PLT_ENTRY_SIZE; | |
70256ad8 | 2856 | } |
70256ad8 AJ |
2857 | } |
2858 | ||
c434dee6 | 2859 | if (htab->sgotplt) |
70256ad8 | 2860 | { |
c434dee6 | 2861 | /* Fill in the first three entries in the global offset table. */ |
eea6121a | 2862 | if (htab->sgotplt->size > 0) |
c434dee6 AJ |
2863 | { |
2864 | /* Set the first entry in the global offset table to the address of | |
2865 | the dynamic section. */ | |
2866 | if (sdyn == NULL) | |
2867 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents); | |
2868 | else | |
2869 | bfd_put_64 (output_bfd, | |
2870 | sdyn->output_section->vma + sdyn->output_offset, | |
2871 | htab->sgotplt->contents); | |
2872 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ | |
2873 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE); | |
2874 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE*2); | |
2875 | } | |
70256ad8 | 2876 | |
c434dee6 AJ |
2877 | elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = |
2878 | GOT_ENTRY_SIZE; | |
2879 | } | |
70256ad8 | 2880 | |
eea6121a | 2881 | if (htab->sgot && htab->sgot->size > 0) |
8c37241b JJ |
2882 | elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize |
2883 | = GOT_ENTRY_SIZE; | |
2884 | ||
b34976b6 | 2885 | return TRUE; |
8d88c4ca NC |
2886 | } |
2887 | ||
4c45e5c9 JJ |
2888 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
2889 | or (bfd_vma) -1 if it should not be included. */ | |
2890 | ||
2891 | static bfd_vma | |
2892 | elf64_x86_64_plt_sym_val (bfd_vma i, const asection *plt, | |
2893 | const arelent *rel ATTRIBUTE_UNUSED) | |
2894 | { | |
2895 | return plt->vma + (i + 1) * PLT_ENTRY_SIZE; | |
2896 | } | |
8df9fc9d | 2897 | |
d2b2c203 DJ |
2898 | /* Handle an x86-64 specific section when reading an object file. This |
2899 | is called when elfcode.h finds a section with an unknown type. */ | |
2900 | ||
2901 | static bfd_boolean | |
6dc132d9 L |
2902 | elf64_x86_64_section_from_shdr (bfd *abfd, |
2903 | Elf_Internal_Shdr *hdr, | |
2904 | const char *name, | |
2905 | int shindex) | |
d2b2c203 DJ |
2906 | { |
2907 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
2908 | return FALSE; | |
2909 | ||
6dc132d9 | 2910 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
2911 | return FALSE; |
2912 | ||
2913 | return TRUE; | |
2914 | } | |
2915 | ||
3b22753a L |
2916 | /* Hook called by the linker routine which adds symbols from an object |
2917 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
2918 | of .bss. */ | |
2919 | ||
2920 | static bfd_boolean | |
2921 | elf64_x86_64_add_symbol_hook (bfd *abfd, | |
2922 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
2923 | Elf_Internal_Sym *sym, | |
2924 | const char **namep ATTRIBUTE_UNUSED, | |
2925 | flagword *flagsp ATTRIBUTE_UNUSED, | |
2926 | asection **secp, bfd_vma *valp) | |
2927 | { | |
2928 | asection *lcomm; | |
2929 | ||
2930 | switch (sym->st_shndx) | |
2931 | { | |
2932 | case SHN_X86_64_LCOMMON: | |
2933 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
2934 | if (lcomm == NULL) | |
2935 | { | |
2936 | lcomm = bfd_make_section_with_flags (abfd, | |
2937 | "LARGE_COMMON", | |
2938 | (SEC_ALLOC | |
2939 | | SEC_IS_COMMON | |
2940 | | SEC_LINKER_CREATED)); | |
2941 | if (lcomm == NULL) | |
2942 | return FALSE; | |
2943 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
2944 | } | |
2945 | *secp = lcomm; | |
2946 | *valp = sym->st_size; | |
2947 | break; | |
2948 | } | |
2949 | return TRUE; | |
2950 | } | |
2951 | ||
2952 | ||
2953 | /* Given a BFD section, try to locate the corresponding ELF section | |
2954 | index. */ | |
2955 | ||
2956 | static bfd_boolean | |
2957 | elf64_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, | |
2958 | asection *sec, int *index) | |
2959 | { | |
2960 | if (sec == &_bfd_elf_large_com_section) | |
2961 | { | |
2962 | *index = SHN_X86_64_LCOMMON; | |
2963 | return TRUE; | |
2964 | } | |
2965 | return FALSE; | |
2966 | } | |
2967 | ||
2968 | /* Process a symbol. */ | |
2969 | ||
2970 | static void | |
2971 | elf64_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, | |
2972 | asymbol *asym) | |
2973 | { | |
2974 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
2975 | ||
2976 | switch (elfsym->internal_elf_sym.st_shndx) | |
2977 | { | |
2978 | case SHN_X86_64_LCOMMON: | |
2979 | asym->section = &_bfd_elf_large_com_section; | |
2980 | asym->value = elfsym->internal_elf_sym.st_size; | |
2981 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
2982 | asym->flags &= ~BSF_GLOBAL; | |
2983 | break; | |
2984 | } | |
2985 | } | |
2986 | ||
2987 | static bfd_boolean | |
2988 | elf64_x86_64_common_definition (Elf_Internal_Sym *sym) | |
2989 | { | |
2990 | return (sym->st_shndx == SHN_COMMON | |
2991 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
2992 | } | |
2993 | ||
2994 | static unsigned int | |
2995 | elf64_x86_64_common_section_index (asection *sec) | |
2996 | { | |
2997 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
2998 | return SHN_COMMON; | |
2999 | else | |
3000 | return SHN_X86_64_LCOMMON; | |
3001 | } | |
3002 | ||
3003 | static asection * | |
3004 | elf64_x86_64_common_section (asection *sec) | |
3005 | { | |
3006 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
3007 | return bfd_com_section_ptr; | |
3008 | else | |
3009 | return &_bfd_elf_large_com_section; | |
3010 | } | |
3011 | ||
3012 | static bfd_boolean | |
3013 | elf64_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
3014 | struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED, | |
3015 | struct elf_link_hash_entry *h, | |
3016 | Elf_Internal_Sym *sym, | |
00492999 | 3017 | asection **psec, |
3b22753a L |
3018 | bfd_vma *pvalue ATTRIBUTE_UNUSED, |
3019 | unsigned int *pold_alignment ATTRIBUTE_UNUSED, | |
3020 | bfd_boolean *skip ATTRIBUTE_UNUSED, | |
3021 | bfd_boolean *override ATTRIBUTE_UNUSED, | |
3022 | bfd_boolean *type_change_ok ATTRIBUTE_UNUSED, | |
3023 | bfd_boolean *size_change_ok ATTRIBUTE_UNUSED, | |
3024 | bfd_boolean *newdef ATTRIBUTE_UNUSED, | |
3025 | bfd_boolean *newdyn, | |
3026 | bfd_boolean *newdyncommon ATTRIBUTE_UNUSED, | |
3027 | bfd_boolean *newweak ATTRIBUTE_UNUSED, | |
3028 | bfd *abfd ATTRIBUTE_UNUSED, | |
3029 | asection **sec, | |
3030 | bfd_boolean *olddef ATTRIBUTE_UNUSED, | |
3031 | bfd_boolean *olddyn, | |
3032 | bfd_boolean *olddyncommon ATTRIBUTE_UNUSED, | |
3033 | bfd_boolean *oldweak ATTRIBUTE_UNUSED, | |
00492999 | 3034 | bfd *oldbfd, |
3b22753a L |
3035 | asection **oldsec) |
3036 | { | |
3037 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
3038 | normal common symbol. We turn the large common symbol into a |
3039 | normal one. */ | |
3b22753a L |
3040 | if (!*olddyn |
3041 | && h->root.type == bfd_link_hash_common | |
3042 | && !*newdyn | |
3043 | && bfd_is_com_section (*sec) | |
00492999 | 3044 | && *oldsec != *sec) |
3b22753a | 3045 | { |
00492999 L |
3046 | if (sym->st_shndx == SHN_COMMON |
3047 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0) | |
3048 | { | |
3049 | h->root.u.c.p->section | |
3050 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
3051 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
3052 | } | |
3053 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
3054 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0) | |
3055 | *psec = *sec = bfd_com_section_ptr; | |
3b22753a L |
3056 | } |
3057 | ||
3058 | return TRUE; | |
3059 | } | |
3060 | ||
3061 | static int | |
3062 | elf64_x86_64_additional_program_headers (bfd *abfd) | |
3063 | { | |
3064 | asection *s; | |
3065 | int count = 0; | |
3066 | ||
3067 | /* Check to see if we need a large readonly segment. */ | |
3068 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
3069 | if (s && (s->flags & SEC_LOAD)) | |
3070 | count++; | |
3071 | ||
3072 | /* Check to see if we need a large data segment. Since .lbss sections | |
3073 | is placed right after the .bss section, there should be no need for | |
3074 | a large data segment just because of .lbss. */ | |
3075 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
3076 | if (s && (s->flags & SEC_LOAD)) | |
3077 | count++; | |
3078 | ||
3079 | return count; | |
3080 | } | |
3081 | ||
3082 | static const struct bfd_elf_special_section | |
3083 | elf64_x86_64_special_sections[]= | |
3084 | { | |
3085 | { ".gnu.linkonce.lb", 16, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
3086 | { ".gnu.linkonce.lr", 16, -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
3087 | { ".gnu.linkonce.lt", 16, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
3088 | { ".lbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
3089 | { ".ldata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
3090 | { ".lrodata", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
3091 | { NULL, 0, 0, 0, 0 } | |
3092 | }; | |
3093 | ||
70256ad8 AJ |
3094 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec |
3095 | #define TARGET_LITTLE_NAME "elf64-x86-64" | |
3096 | #define ELF_ARCH bfd_arch_i386 | |
3097 | #define ELF_MACHINE_CODE EM_X86_64 | |
3098 | #define ELF_MAXPAGESIZE 0x100000 | |
3099 | ||
3100 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 3101 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
3102 | #define elf_backend_want_got_plt 1 |
3103 | #define elf_backend_plt_readonly 1 | |
3104 | #define elf_backend_want_plt_sym 0 | |
3105 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 3106 | #define elf_backend_rela_normal 1 |
70256ad8 AJ |
3107 | |
3108 | #define elf_info_to_howto elf64_x86_64_info_to_howto | |
70256ad8 | 3109 | |
70256ad8 AJ |
3110 | #define bfd_elf64_bfd_link_hash_table_create \ |
3111 | elf64_x86_64_link_hash_table_create | |
407443a3 | 3112 | #define bfd_elf64_bfd_reloc_type_lookup elf64_x86_64_reloc_type_lookup |
70256ad8 AJ |
3113 | |
3114 | #define elf_backend_adjust_dynamic_symbol elf64_x86_64_adjust_dynamic_symbol | |
3115 | #define elf_backend_check_relocs elf64_x86_64_check_relocs | |
c434dee6 AJ |
3116 | #define elf_backend_copy_indirect_symbol elf64_x86_64_copy_indirect_symbol |
3117 | #define elf_backend_create_dynamic_sections elf64_x86_64_create_dynamic_sections | |
3118 | #define elf_backend_finish_dynamic_sections elf64_x86_64_finish_dynamic_sections | |
70256ad8 AJ |
3119 | #define elf_backend_finish_dynamic_symbol elf64_x86_64_finish_dynamic_symbol |
3120 | #define elf_backend_gc_mark_hook elf64_x86_64_gc_mark_hook | |
3121 | #define elf_backend_gc_sweep_hook elf64_x86_64_gc_sweep_hook | |
3bab7989 ML |
3122 | #define elf_backend_grok_prstatus elf64_x86_64_grok_prstatus |
3123 | #define elf_backend_grok_psinfo elf64_x86_64_grok_psinfo | |
c434dee6 | 3124 | #define elf_backend_reloc_type_class elf64_x86_64_reloc_type_class |
70256ad8 AJ |
3125 | #define elf_backend_relocate_section elf64_x86_64_relocate_section |
3126 | #define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections | |
4c45e5c9 | 3127 | #define elf_backend_plt_sym_val elf64_x86_64_plt_sym_val |
407443a3 | 3128 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
bffbf940 | 3129 | #define bfd_elf64_mkobject elf64_x86_64_mkobject |
8d88c4ca | 3130 | |
d2b2c203 DJ |
3131 | #define elf_backend_section_from_shdr \ |
3132 | elf64_x86_64_section_from_shdr | |
3133 | ||
3b22753a L |
3134 | #define elf_backend_section_from_bfd_section \ |
3135 | elf64_x86_64_elf_section_from_bfd_section | |
3136 | #define elf_backend_add_symbol_hook \ | |
3137 | elf64_x86_64_add_symbol_hook | |
3138 | #define elf_backend_symbol_processing \ | |
3139 | elf64_x86_64_symbol_processing | |
3140 | #define elf_backend_common_section_index \ | |
3141 | elf64_x86_64_common_section_index | |
3142 | #define elf_backend_common_section \ | |
3143 | elf64_x86_64_common_section | |
3144 | #define elf_backend_common_definition \ | |
3145 | elf64_x86_64_common_definition | |
3146 | #define elf_backend_merge_symbol \ | |
3147 | elf64_x86_64_merge_symbol | |
3148 | #define elf_backend_special_sections \ | |
3149 | elf64_x86_64_special_sections | |
3150 | #define elf_backend_additional_program_headers \ | |
3151 | elf64_x86_64_additional_program_headers | |
3152 | ||
8d88c4ca | 3153 | #include "elf64-target.h" |