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